1/* 2 * fs/nfs/nfs4proc.c 3 * 4 * Client-side procedure declarations for NFSv4. 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38#include <linux/mm.h> 39#include <linux/delay.h> 40#include <linux/errno.h> 41#include <linux/string.h> 42#include <linux/ratelimit.h> 43#include <linux/printk.h> 44#include <linux/slab.h> 45#include <linux/sunrpc/clnt.h> 46#include <linux/nfs.h> 47#include <linux/nfs4.h> 48#include <linux/nfs_fs.h> 49#include <linux/nfs_page.h> 50#include <linux/nfs_mount.h> 51#include <linux/namei.h> 52#include <linux/mount.h> 53#include <linux/module.h> 54#include <linux/xattr.h> 55#include <linux/utsname.h> 56#include <linux/freezer.h> 57#include <linux/iversion.h> 58 59#include "nfs4_fs.h" 60#include "delegation.h" 61#include "internal.h" 62#include "iostat.h" 63#include "callback.h" 64#include "pnfs.h" 65#include "netns.h" 66#include "sysfs.h" 67#include "nfs4idmap.h" 68#include "nfs4session.h" 69#include "fscache.h" 70#include "nfs42.h" 71 72#include "nfs4trace.h" 73 74#define NFSDBG_FACILITY NFSDBG_PROC 75 76#define NFS4_BITMASK_SZ 3 77 78#define NFS4_POLL_RETRY_MIN (HZ/10) 79#define NFS4_POLL_RETRY_MAX (15*HZ) 80 81/* file attributes which can be mapped to nfs attributes */ 82#define NFS4_VALID_ATTRS (ATTR_MODE \ 83 | ATTR_UID \ 84 | ATTR_GID \ 85 | ATTR_SIZE \ 86 | ATTR_ATIME \ 87 | ATTR_MTIME \ 88 | ATTR_CTIME \ 89 | ATTR_ATIME_SET \ 90 | ATTR_MTIME_SET) 91 92struct nfs4_opendata; 93static int _nfs4_recover_proc_open(struct nfs4_opendata *data); 94static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 95static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); 96static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 97 struct nfs_fattr *fattr, struct inode *inode); 98static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 99 struct nfs_fattr *fattr, struct iattr *sattr, 100 struct nfs_open_context *ctx, struct nfs4_label *ilabel); 101#ifdef CONFIG_NFS_V4_1 102static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 103 const struct cred *cred, 104 struct nfs4_slot *slot, 105 bool is_privileged); 106static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 107 const struct cred *); 108static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *, 109 const struct cred *, bool); 110#endif 111 112#ifdef CONFIG_NFS_V4_SECURITY_LABEL 113static inline struct nfs4_label * 114nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 115 struct iattr *sattr, struct nfs4_label *label) 116{ 117 int err; 118 119 if (label == NULL) 120 return NULL; 121 122 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 123 return NULL; 124 125 label->lfs = 0; 126 label->pi = 0; 127 label->len = 0; 128 label->label = NULL; 129 130 err = security_dentry_init_security(dentry, sattr->ia_mode, 131 &dentry->d_name, NULL, 132 (void **)&label->label, &label->len); 133 if (err == 0) 134 return label; 135 136 return NULL; 137} 138static inline void 139nfs4_label_release_security(struct nfs4_label *label) 140{ 141 if (label) 142 security_release_secctx(label->label, label->len); 143} 144static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 145{ 146 if (label) 147 return server->attr_bitmask; 148 149 return server->attr_bitmask_nl; 150} 151#else 152static inline struct nfs4_label * 153nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 154 struct iattr *sattr, struct nfs4_label *l) 155{ return NULL; } 156static inline void 157nfs4_label_release_security(struct nfs4_label *label) 158{ return; } 159static inline u32 * 160nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 161{ return server->attr_bitmask; } 162#endif 163 164/* Prevent leaks of NFSv4 errors into userland */ 165static int nfs4_map_errors(int err) 166{ 167 if (err >= -1000) 168 return err; 169 switch (err) { 170 case -NFS4ERR_RESOURCE: 171 case -NFS4ERR_LAYOUTTRYLATER: 172 case -NFS4ERR_RECALLCONFLICT: 173 case -NFS4ERR_RETURNCONFLICT: 174 return -EREMOTEIO; 175 case -NFS4ERR_WRONGSEC: 176 case -NFS4ERR_WRONG_CRED: 177 return -EPERM; 178 case -NFS4ERR_BADOWNER: 179 case -NFS4ERR_BADNAME: 180 return -EINVAL; 181 case -NFS4ERR_SHARE_DENIED: 182 return -EACCES; 183 case -NFS4ERR_MINOR_VERS_MISMATCH: 184 return -EPROTONOSUPPORT; 185 case -NFS4ERR_FILE_OPEN: 186 return -EBUSY; 187 case -NFS4ERR_NOT_SAME: 188 return -ENOTSYNC; 189 default: 190 dprintk("%s could not handle NFSv4 error %d\n", 191 __func__, -err); 192 break; 193 } 194 return -EIO; 195} 196 197/* 198 * This is our standard bitmap for GETATTR requests. 199 */ 200const u32 nfs4_fattr_bitmap[3] = { 201 FATTR4_WORD0_TYPE 202 | FATTR4_WORD0_CHANGE 203 | FATTR4_WORD0_SIZE 204 | FATTR4_WORD0_FSID 205 | FATTR4_WORD0_FILEID, 206 FATTR4_WORD1_MODE 207 | FATTR4_WORD1_NUMLINKS 208 | FATTR4_WORD1_OWNER 209 | FATTR4_WORD1_OWNER_GROUP 210 | FATTR4_WORD1_RAWDEV 211 | FATTR4_WORD1_SPACE_USED 212 | FATTR4_WORD1_TIME_ACCESS 213 | FATTR4_WORD1_TIME_METADATA 214 | FATTR4_WORD1_TIME_MODIFY 215 | FATTR4_WORD1_MOUNTED_ON_FILEID, 216#ifdef CONFIG_NFS_V4_SECURITY_LABEL 217 FATTR4_WORD2_SECURITY_LABEL 218#endif 219}; 220 221static const u32 nfs4_pnfs_open_bitmap[3] = { 222 FATTR4_WORD0_TYPE 223 | FATTR4_WORD0_CHANGE 224 | FATTR4_WORD0_SIZE 225 | FATTR4_WORD0_FSID 226 | FATTR4_WORD0_FILEID, 227 FATTR4_WORD1_MODE 228 | FATTR4_WORD1_NUMLINKS 229 | FATTR4_WORD1_OWNER 230 | FATTR4_WORD1_OWNER_GROUP 231 | FATTR4_WORD1_RAWDEV 232 | FATTR4_WORD1_SPACE_USED 233 | FATTR4_WORD1_TIME_ACCESS 234 | FATTR4_WORD1_TIME_METADATA 235 | FATTR4_WORD1_TIME_MODIFY, 236 FATTR4_WORD2_MDSTHRESHOLD 237#ifdef CONFIG_NFS_V4_SECURITY_LABEL 238 | FATTR4_WORD2_SECURITY_LABEL 239#endif 240}; 241 242static const u32 nfs4_open_noattr_bitmap[3] = { 243 FATTR4_WORD0_TYPE 244 | FATTR4_WORD0_FILEID, 245}; 246 247const u32 nfs4_statfs_bitmap[3] = { 248 FATTR4_WORD0_FILES_AVAIL 249 | FATTR4_WORD0_FILES_FREE 250 | FATTR4_WORD0_FILES_TOTAL, 251 FATTR4_WORD1_SPACE_AVAIL 252 | FATTR4_WORD1_SPACE_FREE 253 | FATTR4_WORD1_SPACE_TOTAL 254}; 255 256const u32 nfs4_pathconf_bitmap[3] = { 257 FATTR4_WORD0_MAXLINK 258 | FATTR4_WORD0_MAXNAME, 259 0 260}; 261 262const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 263 | FATTR4_WORD0_MAXREAD 264 | FATTR4_WORD0_MAXWRITE 265 | FATTR4_WORD0_LEASE_TIME, 266 FATTR4_WORD1_TIME_DELTA 267 | FATTR4_WORD1_FS_LAYOUT_TYPES, 268 FATTR4_WORD2_LAYOUT_BLKSIZE 269 | FATTR4_WORD2_CLONE_BLKSIZE 270 | FATTR4_WORD2_CHANGE_ATTR_TYPE 271 | FATTR4_WORD2_XATTR_SUPPORT 272}; 273 274const u32 nfs4_fs_locations_bitmap[3] = { 275 FATTR4_WORD0_CHANGE 276 | FATTR4_WORD0_SIZE 277 | FATTR4_WORD0_FSID 278 | FATTR4_WORD0_FILEID 279 | FATTR4_WORD0_FS_LOCATIONS, 280 FATTR4_WORD1_OWNER 281 | FATTR4_WORD1_OWNER_GROUP 282 | FATTR4_WORD1_RAWDEV 283 | FATTR4_WORD1_SPACE_USED 284 | FATTR4_WORD1_TIME_ACCESS 285 | FATTR4_WORD1_TIME_METADATA 286 | FATTR4_WORD1_TIME_MODIFY 287 | FATTR4_WORD1_MOUNTED_ON_FILEID, 288}; 289 290static void nfs4_bitmap_copy_adjust(__u32 *dst, const __u32 *src, 291 struct inode *inode, unsigned long flags) 292{ 293 unsigned long cache_validity; 294 295 memcpy(dst, src, NFS4_BITMASK_SZ*sizeof(*dst)); 296 if (!inode || !nfs4_have_delegation(inode, FMODE_READ)) 297 return; 298 299 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity) | flags; 300 301 /* Remove the attributes over which we have full control */ 302 dst[1] &= ~FATTR4_WORD1_RAWDEV; 303 if (!(cache_validity & NFS_INO_INVALID_SIZE)) 304 dst[0] &= ~FATTR4_WORD0_SIZE; 305 306 if (!(cache_validity & NFS_INO_INVALID_CHANGE)) 307 dst[0] &= ~FATTR4_WORD0_CHANGE; 308 309 if (!(cache_validity & NFS_INO_INVALID_MODE)) 310 dst[1] &= ~FATTR4_WORD1_MODE; 311 if (!(cache_validity & NFS_INO_INVALID_OTHER)) 312 dst[1] &= ~(FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP); 313} 314 315static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 316 struct nfs4_readdir_arg *readdir) 317{ 318 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; 319 __be32 *start, *p; 320 321 if (cookie > 2) { 322 readdir->cookie = cookie; 323 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 324 return; 325 } 326 327 readdir->cookie = 0; 328 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 329 if (cookie == 2) 330 return; 331 332 /* 333 * NFSv4 servers do not return entries for '.' and '..' 334 * Therefore, we fake these entries here. We let '.' 335 * have cookie 0 and '..' have cookie 1. Note that 336 * when talking to the server, we always send cookie 0 337 * instead of 1 or 2. 338 */ 339 start = p = kmap_atomic(*readdir->pages); 340 341 if (cookie == 0) { 342 *p++ = xdr_one; /* next */ 343 *p++ = xdr_zero; /* cookie, first word */ 344 *p++ = xdr_one; /* cookie, second word */ 345 *p++ = xdr_one; /* entry len */ 346 memcpy(p, ".\0\0\0", 4); /* entry */ 347 p++; 348 *p++ = xdr_one; /* bitmap length */ 349 *p++ = htonl(attrs); /* bitmap */ 350 *p++ = htonl(12); /* attribute buffer length */ 351 *p++ = htonl(NF4DIR); 352 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 353 } 354 355 *p++ = xdr_one; /* next */ 356 *p++ = xdr_zero; /* cookie, first word */ 357 *p++ = xdr_two; /* cookie, second word */ 358 *p++ = xdr_two; /* entry len */ 359 memcpy(p, "..\0\0", 4); /* entry */ 360 p++; 361 *p++ = xdr_one; /* bitmap length */ 362 *p++ = htonl(attrs); /* bitmap */ 363 *p++ = htonl(12); /* attribute buffer length */ 364 *p++ = htonl(NF4DIR); 365 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 366 367 readdir->pgbase = (char *)p - (char *)start; 368 readdir->count -= readdir->pgbase; 369 kunmap_atomic(start); 370} 371 372static void nfs4_fattr_set_prechange(struct nfs_fattr *fattr, u64 version) 373{ 374 if (!(fattr->valid & NFS_ATTR_FATTR_PRECHANGE)) { 375 fattr->pre_change_attr = version; 376 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; 377 } 378} 379 380static void nfs4_test_and_free_stateid(struct nfs_server *server, 381 nfs4_stateid *stateid, 382 const struct cred *cred) 383{ 384 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 385 386 ops->test_and_free_expired(server, stateid, cred); 387} 388 389static void __nfs4_free_revoked_stateid(struct nfs_server *server, 390 nfs4_stateid *stateid, 391 const struct cred *cred) 392{ 393 stateid->type = NFS4_REVOKED_STATEID_TYPE; 394 nfs4_test_and_free_stateid(server, stateid, cred); 395} 396 397static void nfs4_free_revoked_stateid(struct nfs_server *server, 398 const nfs4_stateid *stateid, 399 const struct cred *cred) 400{ 401 nfs4_stateid tmp; 402 403 nfs4_stateid_copy(&tmp, stateid); 404 __nfs4_free_revoked_stateid(server, &tmp, cred); 405} 406 407static long nfs4_update_delay(long *timeout) 408{ 409 long ret; 410 if (!timeout) 411 return NFS4_POLL_RETRY_MAX; 412 if (*timeout <= 0) 413 *timeout = NFS4_POLL_RETRY_MIN; 414 if (*timeout > NFS4_POLL_RETRY_MAX) 415 *timeout = NFS4_POLL_RETRY_MAX; 416 ret = *timeout; 417 *timeout <<= 1; 418 return ret; 419} 420 421static int nfs4_delay_killable(long *timeout) 422{ 423 might_sleep(); 424 425 __set_current_state(TASK_KILLABLE|TASK_FREEZABLE_UNSAFE); 426 schedule_timeout(nfs4_update_delay(timeout)); 427 if (!__fatal_signal_pending(current)) 428 return 0; 429 return -EINTR; 430} 431 432static int nfs4_delay_interruptible(long *timeout) 433{ 434 might_sleep(); 435 436 __set_current_state(TASK_INTERRUPTIBLE|TASK_FREEZABLE_UNSAFE); 437 schedule_timeout(nfs4_update_delay(timeout)); 438 if (!signal_pending(current)) 439 return 0; 440 return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS; 441} 442 443static int nfs4_delay(long *timeout, bool interruptible) 444{ 445 if (interruptible) 446 return nfs4_delay_interruptible(timeout); 447 return nfs4_delay_killable(timeout); 448} 449 450static const nfs4_stateid * 451nfs4_recoverable_stateid(const nfs4_stateid *stateid) 452{ 453 if (!stateid) 454 return NULL; 455 switch (stateid->type) { 456 case NFS4_OPEN_STATEID_TYPE: 457 case NFS4_LOCK_STATEID_TYPE: 458 case NFS4_DELEGATION_STATEID_TYPE: 459 return stateid; 460 default: 461 break; 462 } 463 return NULL; 464} 465 466/* This is the error handling routine for processes that are allowed 467 * to sleep. 468 */ 469static int nfs4_do_handle_exception(struct nfs_server *server, 470 int errorcode, struct nfs4_exception *exception) 471{ 472 struct nfs_client *clp = server->nfs_client; 473 struct nfs4_state *state = exception->state; 474 const nfs4_stateid *stateid; 475 struct inode *inode = exception->inode; 476 int ret = errorcode; 477 478 exception->delay = 0; 479 exception->recovering = 0; 480 exception->retry = 0; 481 482 stateid = nfs4_recoverable_stateid(exception->stateid); 483 if (stateid == NULL && state != NULL) 484 stateid = nfs4_recoverable_stateid(&state->stateid); 485 486 switch(errorcode) { 487 case 0: 488 return 0; 489 case -NFS4ERR_BADHANDLE: 490 case -ESTALE: 491 if (inode != NULL && S_ISREG(inode->i_mode)) 492 pnfs_destroy_layout(NFS_I(inode)); 493 break; 494 case -NFS4ERR_DELEG_REVOKED: 495 case -NFS4ERR_ADMIN_REVOKED: 496 case -NFS4ERR_EXPIRED: 497 case -NFS4ERR_BAD_STATEID: 498 case -NFS4ERR_PARTNER_NO_AUTH: 499 if (inode != NULL && stateid != NULL) { 500 nfs_inode_find_state_and_recover(inode, 501 stateid); 502 goto wait_on_recovery; 503 } 504 fallthrough; 505 case -NFS4ERR_OPENMODE: 506 if (inode) { 507 int err; 508 509 err = nfs_async_inode_return_delegation(inode, 510 stateid); 511 if (err == 0) 512 goto wait_on_recovery; 513 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { 514 exception->retry = 1; 515 break; 516 } 517 } 518 if (state == NULL) 519 break; 520 ret = nfs4_schedule_stateid_recovery(server, state); 521 if (ret < 0) 522 break; 523 goto wait_on_recovery; 524 case -NFS4ERR_STALE_STATEID: 525 case -NFS4ERR_STALE_CLIENTID: 526 nfs4_schedule_lease_recovery(clp); 527 goto wait_on_recovery; 528 case -NFS4ERR_MOVED: 529 ret = nfs4_schedule_migration_recovery(server); 530 if (ret < 0) 531 break; 532 goto wait_on_recovery; 533 case -NFS4ERR_LEASE_MOVED: 534 nfs4_schedule_lease_moved_recovery(clp); 535 goto wait_on_recovery; 536#if defined(CONFIG_NFS_V4_1) 537 case -NFS4ERR_BADSESSION: 538 case -NFS4ERR_BADSLOT: 539 case -NFS4ERR_BAD_HIGH_SLOT: 540 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 541 case -NFS4ERR_DEADSESSION: 542 case -NFS4ERR_SEQ_FALSE_RETRY: 543 case -NFS4ERR_SEQ_MISORDERED: 544 /* Handled in nfs41_sequence_process() */ 545 goto wait_on_recovery; 546#endif /* defined(CONFIG_NFS_V4_1) */ 547 case -NFS4ERR_FILE_OPEN: 548 if (exception->timeout > HZ) { 549 /* We have retried a decent amount, time to 550 * fail 551 */ 552 ret = -EBUSY; 553 break; 554 } 555 fallthrough; 556 case -NFS4ERR_DELAY: 557 nfs_inc_server_stats(server, NFSIOS_DELAY); 558 fallthrough; 559 case -NFS4ERR_GRACE: 560 case -NFS4ERR_LAYOUTTRYLATER: 561 case -NFS4ERR_RECALLCONFLICT: 562 case -NFS4ERR_RETURNCONFLICT: 563 exception->delay = 1; 564 return 0; 565 566 case -NFS4ERR_RETRY_UNCACHED_REP: 567 case -NFS4ERR_OLD_STATEID: 568 exception->retry = 1; 569 break; 570 case -NFS4ERR_BADOWNER: 571 /* The following works around a Linux server bug! */ 572 case -NFS4ERR_BADNAME: 573 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 574 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 575 exception->retry = 1; 576 printk(KERN_WARNING "NFS: v4 server %s " 577 "does not accept raw " 578 "uid/gids. " 579 "Reenabling the idmapper.\n", 580 server->nfs_client->cl_hostname); 581 } 582 } 583 /* We failed to handle the error */ 584 return nfs4_map_errors(ret); 585wait_on_recovery: 586 exception->recovering = 1; 587 return 0; 588} 589 590/* 591 * Track the number of NFS4ERR_DELAY related retransmissions and return 592 * EAGAIN if the 'softerr' mount option is set, and we've exceeded the limit 593 * set by 'nfs_delay_retrans'. 594 */ 595static int nfs4_exception_should_retrans(const struct nfs_server *server, 596 struct nfs4_exception *exception) 597{ 598 if (server->flags & NFS_MOUNT_SOFTERR && nfs_delay_retrans >= 0) { 599 if (exception->retrans++ >= (unsigned short)nfs_delay_retrans) 600 return -EAGAIN; 601 } 602 return 0; 603} 604 605/* This is the error handling routine for processes that are allowed 606 * to sleep. 607 */ 608int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 609{ 610 struct nfs_client *clp = server->nfs_client; 611 int ret; 612 613 ret = nfs4_do_handle_exception(server, errorcode, exception); 614 if (exception->delay) { 615 int ret2 = nfs4_exception_should_retrans(server, exception); 616 if (ret2 < 0) { 617 exception->retry = 0; 618 return ret2; 619 } 620 ret = nfs4_delay(&exception->timeout, 621 exception->interruptible); 622 goto out_retry; 623 } 624 if (exception->recovering) { 625 if (exception->task_is_privileged) 626 return -EDEADLOCK; 627 ret = nfs4_wait_clnt_recover(clp); 628 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 629 return -EIO; 630 goto out_retry; 631 } 632 return ret; 633out_retry: 634 if (ret == 0) 635 exception->retry = 1; 636 return ret; 637} 638 639static int 640nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 641 int errorcode, struct nfs4_exception *exception) 642{ 643 struct nfs_client *clp = server->nfs_client; 644 int ret; 645 646 ret = nfs4_do_handle_exception(server, errorcode, exception); 647 if (exception->delay) { 648 int ret2 = nfs4_exception_should_retrans(server, exception); 649 if (ret2 < 0) { 650 exception->retry = 0; 651 return ret2; 652 } 653 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 654 goto out_retry; 655 } 656 if (exception->recovering) { 657 if (exception->task_is_privileged) 658 return -EDEADLOCK; 659 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 660 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 661 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 662 goto out_retry; 663 } 664 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 665 ret = -EIO; 666 return ret; 667out_retry: 668 if (ret == 0) { 669 exception->retry = 1; 670 /* 671 * For NFS4ERR_MOVED, the client transport will need to 672 * be recomputed after migration recovery has completed. 673 */ 674 if (errorcode == -NFS4ERR_MOVED) 675 rpc_task_release_transport(task); 676 } 677 return ret; 678} 679 680int 681nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 682 struct nfs4_state *state, long *timeout) 683{ 684 struct nfs4_exception exception = { 685 .state = state, 686 }; 687 688 if (task->tk_status >= 0) 689 return 0; 690 if (timeout) 691 exception.timeout = *timeout; 692 task->tk_status = nfs4_async_handle_exception(task, server, 693 task->tk_status, 694 &exception); 695 if (exception.delay && timeout) 696 *timeout = exception.timeout; 697 if (exception.retry) 698 return -EAGAIN; 699 return 0; 700} 701 702/* 703 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 704 * or 'false' otherwise. 705 */ 706static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 707{ 708 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 709 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); 710} 711 712static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 713{ 714 spin_lock(&clp->cl_lock); 715 if (time_before(clp->cl_last_renewal,timestamp)) 716 clp->cl_last_renewal = timestamp; 717 spin_unlock(&clp->cl_lock); 718} 719 720static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 721{ 722 struct nfs_client *clp = server->nfs_client; 723 724 if (!nfs4_has_session(clp)) 725 do_renew_lease(clp, timestamp); 726} 727 728struct nfs4_call_sync_data { 729 const struct nfs_server *seq_server; 730 struct nfs4_sequence_args *seq_args; 731 struct nfs4_sequence_res *seq_res; 732}; 733 734void nfs4_init_sequence(struct nfs4_sequence_args *args, 735 struct nfs4_sequence_res *res, int cache_reply, 736 int privileged) 737{ 738 args->sa_slot = NULL; 739 args->sa_cache_this = cache_reply; 740 args->sa_privileged = privileged; 741 742 res->sr_slot = NULL; 743} 744 745static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 746{ 747 struct nfs4_slot *slot = res->sr_slot; 748 struct nfs4_slot_table *tbl; 749 750 tbl = slot->table; 751 spin_lock(&tbl->slot_tbl_lock); 752 if (!nfs41_wake_and_assign_slot(tbl, slot)) 753 nfs4_free_slot(tbl, slot); 754 spin_unlock(&tbl->slot_tbl_lock); 755 756 res->sr_slot = NULL; 757} 758 759static int nfs40_sequence_done(struct rpc_task *task, 760 struct nfs4_sequence_res *res) 761{ 762 if (res->sr_slot != NULL) 763 nfs40_sequence_free_slot(res); 764 return 1; 765} 766 767#if defined(CONFIG_NFS_V4_1) 768 769static void nfs41_release_slot(struct nfs4_slot *slot) 770{ 771 struct nfs4_session *session; 772 struct nfs4_slot_table *tbl; 773 bool send_new_highest_used_slotid = false; 774 775 if (!slot) 776 return; 777 tbl = slot->table; 778 session = tbl->session; 779 780 /* Bump the slot sequence number */ 781 if (slot->seq_done) 782 slot->seq_nr++; 783 slot->seq_done = 0; 784 785 spin_lock(&tbl->slot_tbl_lock); 786 /* Be nice to the server: try to ensure that the last transmitted 787 * value for highest_user_slotid <= target_highest_slotid 788 */ 789 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 790 send_new_highest_used_slotid = true; 791 792 if (nfs41_wake_and_assign_slot(tbl, slot)) { 793 send_new_highest_used_slotid = false; 794 goto out_unlock; 795 } 796 nfs4_free_slot(tbl, slot); 797 798 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 799 send_new_highest_used_slotid = false; 800out_unlock: 801 spin_unlock(&tbl->slot_tbl_lock); 802 if (send_new_highest_used_slotid) 803 nfs41_notify_server(session->clp); 804 if (waitqueue_active(&tbl->slot_waitq)) 805 wake_up_all(&tbl->slot_waitq); 806} 807 808static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 809{ 810 nfs41_release_slot(res->sr_slot); 811 res->sr_slot = NULL; 812} 813 814static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot, 815 u32 seqnr) 816{ 817 if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0) 818 slot->seq_nr_highest_sent = seqnr; 819} 820static void nfs4_slot_sequence_acked(struct nfs4_slot *slot, u32 seqnr) 821{ 822 nfs4_slot_sequence_record_sent(slot, seqnr); 823 slot->seq_nr_last_acked = seqnr; 824} 825 826static void nfs4_probe_sequence(struct nfs_client *client, const struct cred *cred, 827 struct nfs4_slot *slot) 828{ 829 struct rpc_task *task = _nfs41_proc_sequence(client, cred, slot, true); 830 if (!IS_ERR(task)) 831 rpc_put_task_async(task); 832} 833 834static int nfs41_sequence_process(struct rpc_task *task, 835 struct nfs4_sequence_res *res) 836{ 837 struct nfs4_session *session; 838 struct nfs4_slot *slot = res->sr_slot; 839 struct nfs_client *clp; 840 int status; 841 int ret = 1; 842 843 if (slot == NULL) 844 goto out_noaction; 845 /* don't increment the sequence number if the task wasn't sent */ 846 if (!RPC_WAS_SENT(task) || slot->seq_done) 847 goto out; 848 849 session = slot->table->session; 850 clp = session->clp; 851 852 trace_nfs4_sequence_done(session, res); 853 854 status = res->sr_status; 855 if (task->tk_status == -NFS4ERR_DEADSESSION) 856 status = -NFS4ERR_DEADSESSION; 857 858 /* Check the SEQUENCE operation status */ 859 switch (status) { 860 case 0: 861 /* Mark this sequence number as having been acked */ 862 nfs4_slot_sequence_acked(slot, slot->seq_nr); 863 /* Update the slot's sequence and clientid lease timer */ 864 slot->seq_done = 1; 865 do_renew_lease(clp, res->sr_timestamp); 866 /* Check sequence flags */ 867 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 868 !!slot->privileged); 869 nfs41_update_target_slotid(slot->table, slot, res); 870 break; 871 case 1: 872 /* 873 * sr_status remains 1 if an RPC level error occurred. 874 * The server may or may not have processed the sequence 875 * operation.. 876 */ 877 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 878 slot->seq_done = 1; 879 goto out; 880 case -NFS4ERR_DELAY: 881 /* The server detected a resend of the RPC call and 882 * returned NFS4ERR_DELAY as per Section 2.10.6.2 883 * of RFC5661. 884 */ 885 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 886 __func__, 887 slot->slot_nr, 888 slot->seq_nr); 889 goto out_retry; 890 case -NFS4ERR_RETRY_UNCACHED_REP: 891 case -NFS4ERR_SEQ_FALSE_RETRY: 892 /* 893 * The server thinks we tried to replay a request. 894 * Retry the call after bumping the sequence ID. 895 */ 896 nfs4_slot_sequence_acked(slot, slot->seq_nr); 897 goto retry_new_seq; 898 case -NFS4ERR_BADSLOT: 899 /* 900 * The slot id we used was probably retired. Try again 901 * using a different slot id. 902 */ 903 if (slot->slot_nr < slot->table->target_highest_slotid) 904 goto session_recover; 905 goto retry_nowait; 906 case -NFS4ERR_SEQ_MISORDERED: 907 nfs4_slot_sequence_record_sent(slot, slot->seq_nr); 908 /* 909 * Were one or more calls using this slot interrupted? 910 * If the server never received the request, then our 911 * transmitted slot sequence number may be too high. However, 912 * if the server did receive the request then it might 913 * accidentally give us a reply with a mismatched operation. 914 * We can sort this out by sending a lone sequence operation 915 * to the server on the same slot. 916 */ 917 if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) { 918 slot->seq_nr--; 919 if (task->tk_msg.rpc_proc != &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE]) { 920 nfs4_probe_sequence(clp, task->tk_msg.rpc_cred, slot); 921 res->sr_slot = NULL; 922 } 923 goto retry_nowait; 924 } 925 /* 926 * RFC5661: 927 * A retry might be sent while the original request is 928 * still in progress on the replier. The replier SHOULD 929 * deal with the issue by returning NFS4ERR_DELAY as the 930 * reply to SEQUENCE or CB_SEQUENCE operation, but 931 * implementations MAY return NFS4ERR_SEQ_MISORDERED. 932 * 933 * Restart the search after a delay. 934 */ 935 slot->seq_nr = slot->seq_nr_highest_sent; 936 goto out_retry; 937 case -NFS4ERR_BADSESSION: 938 case -NFS4ERR_DEADSESSION: 939 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 940 goto session_recover; 941 default: 942 /* Just update the slot sequence no. */ 943 slot->seq_done = 1; 944 } 945out: 946 /* The session may be reset by one of the error handlers. */ 947 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 948out_noaction: 949 return ret; 950session_recover: 951 set_bit(NFS4_SLOT_TBL_DRAINING, &session->fc_slot_table.slot_tbl_state); 952 nfs4_schedule_session_recovery(session, status); 953 dprintk("%s ERROR: %d Reset session\n", __func__, status); 954 nfs41_sequence_free_slot(res); 955 goto out; 956retry_new_seq: 957 ++slot->seq_nr; 958retry_nowait: 959 if (rpc_restart_call_prepare(task)) { 960 nfs41_sequence_free_slot(res); 961 task->tk_status = 0; 962 ret = 0; 963 } 964 goto out; 965out_retry: 966 if (!rpc_restart_call(task)) 967 goto out; 968 rpc_delay(task, NFS4_POLL_RETRY_MAX); 969 return 0; 970} 971 972int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 973{ 974 if (!nfs41_sequence_process(task, res)) 975 return 0; 976 if (res->sr_slot != NULL) 977 nfs41_sequence_free_slot(res); 978 return 1; 979 980} 981EXPORT_SYMBOL_GPL(nfs41_sequence_done); 982 983static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 984{ 985 if (res->sr_slot == NULL) 986 return 1; 987 if (res->sr_slot->table->session != NULL) 988 return nfs41_sequence_process(task, res); 989 return nfs40_sequence_done(task, res); 990} 991 992static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 993{ 994 if (res->sr_slot != NULL) { 995 if (res->sr_slot->table->session != NULL) 996 nfs41_sequence_free_slot(res); 997 else 998 nfs40_sequence_free_slot(res); 999 } 1000} 1001 1002int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 1003{ 1004 if (res->sr_slot == NULL) 1005 return 1; 1006 if (!res->sr_slot->table->session) 1007 return nfs40_sequence_done(task, res); 1008 return nfs41_sequence_done(task, res); 1009} 1010EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1011 1012static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 1013{ 1014 struct nfs4_call_sync_data *data = calldata; 1015 1016 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 1017 1018 nfs4_setup_sequence(data->seq_server->nfs_client, 1019 data->seq_args, data->seq_res, task); 1020} 1021 1022static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 1023{ 1024 struct nfs4_call_sync_data *data = calldata; 1025 1026 nfs41_sequence_done(task, data->seq_res); 1027} 1028 1029static const struct rpc_call_ops nfs41_call_sync_ops = { 1030 .rpc_call_prepare = nfs41_call_sync_prepare, 1031 .rpc_call_done = nfs41_call_sync_done, 1032}; 1033 1034#else /* !CONFIG_NFS_V4_1 */ 1035 1036static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 1037{ 1038 return nfs40_sequence_done(task, res); 1039} 1040 1041static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 1042{ 1043 if (res->sr_slot != NULL) 1044 nfs40_sequence_free_slot(res); 1045} 1046 1047int nfs4_sequence_done(struct rpc_task *task, 1048 struct nfs4_sequence_res *res) 1049{ 1050 return nfs40_sequence_done(task, res); 1051} 1052EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1053 1054#endif /* !CONFIG_NFS_V4_1 */ 1055 1056static void nfs41_sequence_res_init(struct nfs4_sequence_res *res) 1057{ 1058 res->sr_timestamp = jiffies; 1059 res->sr_status_flags = 0; 1060 res->sr_status = 1; 1061} 1062 1063static 1064void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args, 1065 struct nfs4_sequence_res *res, 1066 struct nfs4_slot *slot) 1067{ 1068 if (!slot) 1069 return; 1070 slot->privileged = args->sa_privileged ? 1 : 0; 1071 args->sa_slot = slot; 1072 1073 res->sr_slot = slot; 1074} 1075 1076int nfs4_setup_sequence(struct nfs_client *client, 1077 struct nfs4_sequence_args *args, 1078 struct nfs4_sequence_res *res, 1079 struct rpc_task *task) 1080{ 1081 struct nfs4_session *session = nfs4_get_session(client); 1082 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 1083 struct nfs4_slot *slot; 1084 1085 /* slot already allocated? */ 1086 if (res->sr_slot != NULL) 1087 goto out_start; 1088 1089 if (session) 1090 tbl = &session->fc_slot_table; 1091 1092 spin_lock(&tbl->slot_tbl_lock); 1093 /* The state manager will wait until the slot table is empty */ 1094 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 1095 goto out_sleep; 1096 1097 slot = nfs4_alloc_slot(tbl); 1098 if (IS_ERR(slot)) { 1099 if (slot == ERR_PTR(-ENOMEM)) 1100 goto out_sleep_timeout; 1101 goto out_sleep; 1102 } 1103 spin_unlock(&tbl->slot_tbl_lock); 1104 1105 nfs4_sequence_attach_slot(args, res, slot); 1106 1107 trace_nfs4_setup_sequence(session, args); 1108out_start: 1109 nfs41_sequence_res_init(res); 1110 rpc_call_start(task); 1111 return 0; 1112out_sleep_timeout: 1113 /* Try again in 1/4 second */ 1114 if (args->sa_privileged) 1115 rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task, 1116 jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED); 1117 else 1118 rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task, 1119 NULL, jiffies + (HZ >> 2)); 1120 spin_unlock(&tbl->slot_tbl_lock); 1121 return -EAGAIN; 1122out_sleep: 1123 if (args->sa_privileged) 1124 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 1125 RPC_PRIORITY_PRIVILEGED); 1126 else 1127 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 1128 spin_unlock(&tbl->slot_tbl_lock); 1129 return -EAGAIN; 1130} 1131EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 1132 1133static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1134{ 1135 struct nfs4_call_sync_data *data = calldata; 1136 nfs4_setup_sequence(data->seq_server->nfs_client, 1137 data->seq_args, data->seq_res, task); 1138} 1139 1140static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1141{ 1142 struct nfs4_call_sync_data *data = calldata; 1143 nfs4_sequence_done(task, data->seq_res); 1144} 1145 1146static const struct rpc_call_ops nfs40_call_sync_ops = { 1147 .rpc_call_prepare = nfs40_call_sync_prepare, 1148 .rpc_call_done = nfs40_call_sync_done, 1149}; 1150 1151static int nfs4_call_sync_custom(struct rpc_task_setup *task_setup) 1152{ 1153 int ret; 1154 struct rpc_task *task; 1155 1156 task = rpc_run_task(task_setup); 1157 if (IS_ERR(task)) 1158 return PTR_ERR(task); 1159 1160 ret = task->tk_status; 1161 rpc_put_task(task); 1162 return ret; 1163} 1164 1165static int nfs4_do_call_sync(struct rpc_clnt *clnt, 1166 struct nfs_server *server, 1167 struct rpc_message *msg, 1168 struct nfs4_sequence_args *args, 1169 struct nfs4_sequence_res *res, 1170 unsigned short task_flags) 1171{ 1172 struct nfs_client *clp = server->nfs_client; 1173 struct nfs4_call_sync_data data = { 1174 .seq_server = server, 1175 .seq_args = args, 1176 .seq_res = res, 1177 }; 1178 struct rpc_task_setup task_setup = { 1179 .rpc_client = clnt, 1180 .rpc_message = msg, 1181 .callback_ops = clp->cl_mvops->call_sync_ops, 1182 .callback_data = &data, 1183 .flags = task_flags, 1184 }; 1185 1186 return nfs4_call_sync_custom(&task_setup); 1187} 1188 1189static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1190 struct nfs_server *server, 1191 struct rpc_message *msg, 1192 struct nfs4_sequence_args *args, 1193 struct nfs4_sequence_res *res) 1194{ 1195 unsigned short task_flags = 0; 1196 1197 if (server->caps & NFS_CAP_MOVEABLE) 1198 task_flags = RPC_TASK_MOVEABLE; 1199 return nfs4_do_call_sync(clnt, server, msg, args, res, task_flags); 1200} 1201 1202 1203int nfs4_call_sync(struct rpc_clnt *clnt, 1204 struct nfs_server *server, 1205 struct rpc_message *msg, 1206 struct nfs4_sequence_args *args, 1207 struct nfs4_sequence_res *res, 1208 int cache_reply) 1209{ 1210 nfs4_init_sequence(args, res, cache_reply, 0); 1211 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1212} 1213 1214static void 1215nfs4_inc_nlink_locked(struct inode *inode) 1216{ 1217 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1218 NFS_INO_INVALID_CTIME | 1219 NFS_INO_INVALID_NLINK); 1220 inc_nlink(inode); 1221} 1222 1223static void 1224nfs4_inc_nlink(struct inode *inode) 1225{ 1226 spin_lock(&inode->i_lock); 1227 nfs4_inc_nlink_locked(inode); 1228 spin_unlock(&inode->i_lock); 1229} 1230 1231static void 1232nfs4_dec_nlink_locked(struct inode *inode) 1233{ 1234 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 1235 NFS_INO_INVALID_CTIME | 1236 NFS_INO_INVALID_NLINK); 1237 drop_nlink(inode); 1238} 1239 1240static void 1241nfs4_update_changeattr_locked(struct inode *inode, 1242 struct nfs4_change_info *cinfo, 1243 unsigned long timestamp, unsigned long cache_validity) 1244{ 1245 struct nfs_inode *nfsi = NFS_I(inode); 1246 u64 change_attr = inode_peek_iversion_raw(inode); 1247 1248 cache_validity |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME; 1249 if (S_ISDIR(inode->i_mode)) 1250 cache_validity |= NFS_INO_INVALID_DATA; 1251 1252 switch (NFS_SERVER(inode)->change_attr_type) { 1253 case NFS4_CHANGE_TYPE_IS_UNDEFINED: 1254 if (cinfo->after == change_attr) 1255 goto out; 1256 break; 1257 default: 1258 if ((s64)(change_attr - cinfo->after) >= 0) 1259 goto out; 1260 } 1261 1262 inode_set_iversion_raw(inode, cinfo->after); 1263 if (!cinfo->atomic || cinfo->before != change_attr) { 1264 if (S_ISDIR(inode->i_mode)) 1265 nfs_force_lookup_revalidate(inode); 1266 1267 if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) 1268 cache_validity |= 1269 NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL | 1270 NFS_INO_INVALID_SIZE | NFS_INO_INVALID_OTHER | 1271 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_NLINK | 1272 NFS_INO_INVALID_MODE | NFS_INO_INVALID_XATTR; 1273 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); 1274 } 1275 nfsi->attrtimeo_timestamp = jiffies; 1276 nfsi->read_cache_jiffies = timestamp; 1277 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1278 nfsi->cache_validity &= ~NFS_INO_INVALID_CHANGE; 1279out: 1280 nfs_set_cache_invalid(inode, cache_validity); 1281} 1282 1283void 1284nfs4_update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1285 unsigned long timestamp, unsigned long cache_validity) 1286{ 1287 spin_lock(&dir->i_lock); 1288 nfs4_update_changeattr_locked(dir, cinfo, timestamp, cache_validity); 1289 spin_unlock(&dir->i_lock); 1290} 1291 1292struct nfs4_open_createattrs { 1293 struct nfs4_label *label; 1294 struct iattr *sattr; 1295 const __u32 verf[2]; 1296}; 1297 1298static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1299 int err, struct nfs4_exception *exception) 1300{ 1301 if (err != -EINVAL) 1302 return false; 1303 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1304 return false; 1305 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1306 exception->retry = 1; 1307 return true; 1308} 1309 1310static fmode_t _nfs4_ctx_to_accessmode(const struct nfs_open_context *ctx) 1311{ 1312 return ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 1313} 1314 1315static fmode_t _nfs4_ctx_to_openmode(const struct nfs_open_context *ctx) 1316{ 1317 fmode_t ret = ctx->mode & (FMODE_READ|FMODE_WRITE); 1318 1319 return (ctx->mode & FMODE_EXEC) ? FMODE_READ | ret : ret; 1320} 1321 1322static u32 1323nfs4_map_atomic_open_share(struct nfs_server *server, 1324 fmode_t fmode, int openflags) 1325{ 1326 u32 res = 0; 1327 1328 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1329 case FMODE_READ: 1330 res = NFS4_SHARE_ACCESS_READ; 1331 break; 1332 case FMODE_WRITE: 1333 res = NFS4_SHARE_ACCESS_WRITE; 1334 break; 1335 case FMODE_READ|FMODE_WRITE: 1336 res = NFS4_SHARE_ACCESS_BOTH; 1337 } 1338 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1339 goto out; 1340 /* Want no delegation if we're using O_DIRECT */ 1341 if (openflags & O_DIRECT) 1342 res |= NFS4_SHARE_WANT_NO_DELEG; 1343out: 1344 return res; 1345} 1346 1347static enum open_claim_type4 1348nfs4_map_atomic_open_claim(struct nfs_server *server, 1349 enum open_claim_type4 claim) 1350{ 1351 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1352 return claim; 1353 switch (claim) { 1354 default: 1355 return claim; 1356 case NFS4_OPEN_CLAIM_FH: 1357 return NFS4_OPEN_CLAIM_NULL; 1358 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1359 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1360 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1361 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1362 } 1363} 1364 1365static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1366{ 1367 p->o_res.f_attr = &p->f_attr; 1368 p->o_res.seqid = p->o_arg.seqid; 1369 p->c_res.seqid = p->c_arg.seqid; 1370 p->o_res.server = p->o_arg.server; 1371 p->o_res.access_request = p->o_arg.access; 1372 nfs_fattr_init(&p->f_attr); 1373 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1374} 1375 1376static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1377 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1378 const struct nfs4_open_createattrs *c, 1379 enum open_claim_type4 claim, 1380 gfp_t gfp_mask) 1381{ 1382 struct dentry *parent = dget_parent(dentry); 1383 struct inode *dir = d_inode(parent); 1384 struct nfs_server *server = NFS_SERVER(dir); 1385 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1386 struct nfs4_label *label = (c != NULL) ? c->label : NULL; 1387 struct nfs4_opendata *p; 1388 1389 p = kzalloc(sizeof(*p), gfp_mask); 1390 if (p == NULL) 1391 goto err; 1392 1393 p->f_attr.label = nfs4_label_alloc(server, gfp_mask); 1394 if (IS_ERR(p->f_attr.label)) 1395 goto err_free_p; 1396 1397 p->a_label = nfs4_label_alloc(server, gfp_mask); 1398 if (IS_ERR(p->a_label)) 1399 goto err_free_f; 1400 1401 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1402 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1403 if (IS_ERR(p->o_arg.seqid)) 1404 goto err_free_label; 1405 nfs_sb_active(dentry->d_sb); 1406 p->dentry = dget(dentry); 1407 p->dir = parent; 1408 p->owner = sp; 1409 atomic_inc(&sp->so_count); 1410 p->o_arg.open_flags = flags; 1411 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1412 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1413 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1414 fmode, flags); 1415 if (flags & O_CREAT) { 1416 p->o_arg.umask = current_umask(); 1417 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1418 if (c->sattr != NULL && c->sattr->ia_valid != 0) { 1419 p->o_arg.u.attrs = &p->attrs; 1420 memcpy(&p->attrs, c->sattr, sizeof(p->attrs)); 1421 1422 memcpy(p->o_arg.u.verifier.data, c->verf, 1423 sizeof(p->o_arg.u.verifier.data)); 1424 } 1425 } 1426 /* ask server to check for all possible rights as results 1427 * are cached */ 1428 switch (p->o_arg.claim) { 1429 default: 1430 break; 1431 case NFS4_OPEN_CLAIM_NULL: 1432 case NFS4_OPEN_CLAIM_FH: 1433 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | 1434 NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE | 1435 NFS4_ACCESS_EXECUTE | 1436 nfs_access_xattr_mask(server); 1437 } 1438 p->o_arg.clientid = server->nfs_client->cl_clientid; 1439 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1440 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1441 p->o_arg.name = &dentry->d_name; 1442 p->o_arg.server = server; 1443 p->o_arg.bitmask = nfs4_bitmask(server, label); 1444 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1445 switch (p->o_arg.claim) { 1446 case NFS4_OPEN_CLAIM_NULL: 1447 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1448 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1449 p->o_arg.fh = NFS_FH(dir); 1450 break; 1451 case NFS4_OPEN_CLAIM_PREVIOUS: 1452 case NFS4_OPEN_CLAIM_FH: 1453 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1454 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1455 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1456 } 1457 p->c_arg.fh = &p->o_res.fh; 1458 p->c_arg.stateid = &p->o_res.stateid; 1459 p->c_arg.seqid = p->o_arg.seqid; 1460 nfs4_init_opendata_res(p); 1461 kref_init(&p->kref); 1462 return p; 1463 1464err_free_label: 1465 nfs4_label_free(p->a_label); 1466err_free_f: 1467 nfs4_label_free(p->f_attr.label); 1468err_free_p: 1469 kfree(p); 1470err: 1471 dput(parent); 1472 return NULL; 1473} 1474 1475static void nfs4_opendata_free(struct kref *kref) 1476{ 1477 struct nfs4_opendata *p = container_of(kref, 1478 struct nfs4_opendata, kref); 1479 struct super_block *sb = p->dentry->d_sb; 1480 1481 nfs4_lgopen_release(p->lgp); 1482 nfs_free_seqid(p->o_arg.seqid); 1483 nfs4_sequence_free_slot(&p->o_res.seq_res); 1484 if (p->state != NULL) 1485 nfs4_put_open_state(p->state); 1486 nfs4_put_state_owner(p->owner); 1487 1488 nfs4_label_free(p->a_label); 1489 nfs4_label_free(p->f_attr.label); 1490 1491 dput(p->dir); 1492 dput(p->dentry); 1493 nfs_sb_deactive(sb); 1494 nfs_fattr_free_names(&p->f_attr); 1495 kfree(p->f_attr.mdsthreshold); 1496 kfree(p); 1497} 1498 1499static void nfs4_opendata_put(struct nfs4_opendata *p) 1500{ 1501 if (p != NULL) 1502 kref_put(&p->kref, nfs4_opendata_free); 1503} 1504 1505static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1506 fmode_t fmode) 1507{ 1508 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1509 case FMODE_READ|FMODE_WRITE: 1510 return state->n_rdwr != 0; 1511 case FMODE_WRITE: 1512 return state->n_wronly != 0; 1513 case FMODE_READ: 1514 return state->n_rdonly != 0; 1515 } 1516 WARN_ON_ONCE(1); 1517 return false; 1518} 1519 1520static int can_open_cached(struct nfs4_state *state, fmode_t mode, 1521 int open_mode, enum open_claim_type4 claim) 1522{ 1523 int ret = 0; 1524 1525 if (open_mode & (O_EXCL|O_TRUNC)) 1526 goto out; 1527 switch (claim) { 1528 case NFS4_OPEN_CLAIM_NULL: 1529 case NFS4_OPEN_CLAIM_FH: 1530 goto out; 1531 default: 1532 break; 1533 } 1534 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1535 case FMODE_READ: 1536 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1537 && state->n_rdonly != 0; 1538 break; 1539 case FMODE_WRITE: 1540 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1541 && state->n_wronly != 0; 1542 break; 1543 case FMODE_READ|FMODE_WRITE: 1544 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1545 && state->n_rdwr != 0; 1546 } 1547out: 1548 return ret; 1549} 1550 1551static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1552 enum open_claim_type4 claim) 1553{ 1554 if (delegation == NULL) 1555 return 0; 1556 if ((delegation->type & fmode) != fmode) 1557 return 0; 1558 switch (claim) { 1559 case NFS4_OPEN_CLAIM_NULL: 1560 case NFS4_OPEN_CLAIM_FH: 1561 break; 1562 case NFS4_OPEN_CLAIM_PREVIOUS: 1563 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1564 break; 1565 fallthrough; 1566 default: 1567 return 0; 1568 } 1569 nfs_mark_delegation_referenced(delegation); 1570 return 1; 1571} 1572 1573static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1574{ 1575 switch (fmode) { 1576 case FMODE_WRITE: 1577 state->n_wronly++; 1578 break; 1579 case FMODE_READ: 1580 state->n_rdonly++; 1581 break; 1582 case FMODE_READ|FMODE_WRITE: 1583 state->n_rdwr++; 1584 } 1585 nfs4_state_set_mode_locked(state, state->state | fmode); 1586} 1587 1588#ifdef CONFIG_NFS_V4_1 1589static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1590{ 1591 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1592 return true; 1593 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1594 return true; 1595 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1596 return true; 1597 return false; 1598} 1599#endif /* CONFIG_NFS_V4_1 */ 1600 1601static void nfs_state_log_update_open_stateid(struct nfs4_state *state) 1602{ 1603 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags)) 1604 wake_up_all(&state->waitq); 1605} 1606 1607static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1608{ 1609 struct nfs_client *clp = state->owner->so_server->nfs_client; 1610 bool need_recover = false; 1611 1612 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1613 need_recover = true; 1614 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1615 need_recover = true; 1616 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1617 need_recover = true; 1618 if (need_recover) 1619 nfs4_state_mark_reclaim_nograce(clp, state); 1620} 1621 1622/* 1623 * Check for whether or not the caller may update the open stateid 1624 * to the value passed in by stateid. 1625 * 1626 * Note: This function relies heavily on the server implementing 1627 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2 1628 * correctly. 1629 * i.e. The stateid seqids have to be initialised to 1, and 1630 * are then incremented on every state transition. 1631 */ 1632static bool nfs_stateid_is_sequential(struct nfs4_state *state, 1633 const nfs4_stateid *stateid) 1634{ 1635 if (test_bit(NFS_OPEN_STATE, &state->flags)) { 1636 /* The common case - we're updating to a new sequence number */ 1637 if (nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1638 if (nfs4_stateid_is_next(&state->open_stateid, stateid)) 1639 return true; 1640 return false; 1641 } 1642 /* The server returned a new stateid */ 1643 } 1644 /* This is the first OPEN in this generation */ 1645 if (stateid->seqid == cpu_to_be32(1)) 1646 return true; 1647 return false; 1648} 1649 1650static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1651{ 1652 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1653 return; 1654 if (state->n_wronly) 1655 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1656 if (state->n_rdonly) 1657 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1658 if (state->n_rdwr) 1659 set_bit(NFS_O_RDWR_STATE, &state->flags); 1660 set_bit(NFS_OPEN_STATE, &state->flags); 1661} 1662 1663static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1664 nfs4_stateid *stateid, fmode_t fmode) 1665{ 1666 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1667 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1668 case FMODE_WRITE: 1669 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1670 break; 1671 case FMODE_READ: 1672 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1673 break; 1674 case 0: 1675 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1676 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1677 clear_bit(NFS_OPEN_STATE, &state->flags); 1678 } 1679 if (stateid == NULL) 1680 return; 1681 /* Handle OPEN+OPEN_DOWNGRADE races */ 1682 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1683 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1684 nfs_resync_open_stateid_locked(state); 1685 goto out; 1686 } 1687 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1688 nfs4_stateid_copy(&state->stateid, stateid); 1689 nfs4_stateid_copy(&state->open_stateid, stateid); 1690 trace_nfs4_open_stateid_update(state->inode, stateid, 0); 1691out: 1692 nfs_state_log_update_open_stateid(state); 1693} 1694 1695static void nfs_clear_open_stateid(struct nfs4_state *state, 1696 nfs4_stateid *arg_stateid, 1697 nfs4_stateid *stateid, fmode_t fmode) 1698{ 1699 write_seqlock(&state->seqlock); 1700 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1701 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1702 nfs_clear_open_stateid_locked(state, stateid, fmode); 1703 write_sequnlock(&state->seqlock); 1704 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1705 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1706} 1707 1708static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1709 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1710 __must_hold(&state->owner->so_lock) 1711 __must_hold(&state->seqlock) 1712 __must_hold(RCU) 1713 1714{ 1715 DEFINE_WAIT(wait); 1716 int status = 0; 1717 for (;;) { 1718 1719 if (nfs_stateid_is_sequential(state, stateid)) 1720 break; 1721 1722 if (status) 1723 break; 1724 /* Rely on seqids for serialisation with NFSv4.0 */ 1725 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client)) 1726 break; 1727 1728 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 1729 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 1730 /* 1731 * Ensure we process the state changes in the same order 1732 * in which the server processed them by delaying the 1733 * update of the stateid until we are in sequence. 1734 */ 1735 write_sequnlock(&state->seqlock); 1736 spin_unlock(&state->owner->so_lock); 1737 rcu_read_unlock(); 1738 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0); 1739 1740 if (!fatal_signal_pending(current)) { 1741 if (schedule_timeout(5*HZ) == 0) 1742 status = -EAGAIN; 1743 else 1744 status = 0; 1745 } else 1746 status = -EINTR; 1747 finish_wait(&state->waitq, &wait); 1748 rcu_read_lock(); 1749 spin_lock(&state->owner->so_lock); 1750 write_seqlock(&state->seqlock); 1751 } 1752 1753 if (test_bit(NFS_OPEN_STATE, &state->flags) && 1754 !nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1755 nfs4_stateid_copy(freeme, &state->open_stateid); 1756 nfs_test_and_clear_all_open_stateid(state); 1757 } 1758 1759 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1760 nfs4_stateid_copy(&state->stateid, stateid); 1761 nfs4_stateid_copy(&state->open_stateid, stateid); 1762 trace_nfs4_open_stateid_update(state->inode, stateid, status); 1763 nfs_state_log_update_open_stateid(state); 1764} 1765 1766static void nfs_state_set_open_stateid(struct nfs4_state *state, 1767 const nfs4_stateid *open_stateid, 1768 fmode_t fmode, 1769 nfs4_stateid *freeme) 1770{ 1771 /* 1772 * Protect the call to nfs4_state_set_mode_locked and 1773 * serialise the stateid update 1774 */ 1775 write_seqlock(&state->seqlock); 1776 nfs_set_open_stateid_locked(state, open_stateid, freeme); 1777 switch (fmode) { 1778 case FMODE_READ: 1779 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1780 break; 1781 case FMODE_WRITE: 1782 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1783 break; 1784 case FMODE_READ|FMODE_WRITE: 1785 set_bit(NFS_O_RDWR_STATE, &state->flags); 1786 } 1787 set_bit(NFS_OPEN_STATE, &state->flags); 1788 write_sequnlock(&state->seqlock); 1789} 1790 1791static void nfs_state_clear_open_state_flags(struct nfs4_state *state) 1792{ 1793 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1794 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1795 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1796 clear_bit(NFS_OPEN_STATE, &state->flags); 1797} 1798 1799static void nfs_state_set_delegation(struct nfs4_state *state, 1800 const nfs4_stateid *deleg_stateid, 1801 fmode_t fmode) 1802{ 1803 /* 1804 * Protect the call to nfs4_state_set_mode_locked and 1805 * serialise the stateid update 1806 */ 1807 write_seqlock(&state->seqlock); 1808 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1809 set_bit(NFS_DELEGATED_STATE, &state->flags); 1810 write_sequnlock(&state->seqlock); 1811} 1812 1813static void nfs_state_clear_delegation(struct nfs4_state *state) 1814{ 1815 write_seqlock(&state->seqlock); 1816 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1817 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1818 write_sequnlock(&state->seqlock); 1819} 1820 1821int update_open_stateid(struct nfs4_state *state, 1822 const nfs4_stateid *open_stateid, 1823 const nfs4_stateid *delegation, 1824 fmode_t fmode) 1825{ 1826 struct nfs_server *server = NFS_SERVER(state->inode); 1827 struct nfs_client *clp = server->nfs_client; 1828 struct nfs_inode *nfsi = NFS_I(state->inode); 1829 struct nfs_delegation *deleg_cur; 1830 nfs4_stateid freeme = { }; 1831 int ret = 0; 1832 1833 fmode &= (FMODE_READ|FMODE_WRITE); 1834 1835 rcu_read_lock(); 1836 spin_lock(&state->owner->so_lock); 1837 if (open_stateid != NULL) { 1838 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme); 1839 ret = 1; 1840 } 1841 1842 deleg_cur = nfs4_get_valid_delegation(state->inode); 1843 if (deleg_cur == NULL) 1844 goto no_delegation; 1845 1846 spin_lock(&deleg_cur->lock); 1847 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1848 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1849 (deleg_cur->type & fmode) != fmode) 1850 goto no_delegation_unlock; 1851 1852 if (delegation == NULL) 1853 delegation = &deleg_cur->stateid; 1854 else if (!nfs4_stateid_match_other(&deleg_cur->stateid, delegation)) 1855 goto no_delegation_unlock; 1856 1857 nfs_mark_delegation_referenced(deleg_cur); 1858 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode); 1859 ret = 1; 1860no_delegation_unlock: 1861 spin_unlock(&deleg_cur->lock); 1862no_delegation: 1863 if (ret) 1864 update_open_stateflags(state, fmode); 1865 spin_unlock(&state->owner->so_lock); 1866 rcu_read_unlock(); 1867 1868 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1869 nfs4_schedule_state_manager(clp); 1870 if (freeme.type != 0) 1871 nfs4_test_and_free_stateid(server, &freeme, 1872 state->owner->so_cred); 1873 1874 return ret; 1875} 1876 1877static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1878 const nfs4_stateid *stateid) 1879{ 1880 struct nfs4_state *state = lsp->ls_state; 1881 bool ret = false; 1882 1883 spin_lock(&state->state_lock); 1884 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1885 goto out_noupdate; 1886 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1887 goto out_noupdate; 1888 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1889 ret = true; 1890out_noupdate: 1891 spin_unlock(&state->state_lock); 1892 return ret; 1893} 1894 1895static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1896{ 1897 struct nfs_delegation *delegation; 1898 1899 fmode &= FMODE_READ|FMODE_WRITE; 1900 rcu_read_lock(); 1901 delegation = nfs4_get_valid_delegation(inode); 1902 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1903 rcu_read_unlock(); 1904 return; 1905 } 1906 rcu_read_unlock(); 1907 nfs4_inode_return_delegation(inode); 1908} 1909 1910static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1911{ 1912 struct nfs4_state *state = opendata->state; 1913 struct nfs_delegation *delegation; 1914 int open_mode = opendata->o_arg.open_flags; 1915 fmode_t fmode = opendata->o_arg.fmode; 1916 enum open_claim_type4 claim = opendata->o_arg.claim; 1917 nfs4_stateid stateid; 1918 int ret = -EAGAIN; 1919 1920 for (;;) { 1921 spin_lock(&state->owner->so_lock); 1922 if (can_open_cached(state, fmode, open_mode, claim)) { 1923 update_open_stateflags(state, fmode); 1924 spin_unlock(&state->owner->so_lock); 1925 goto out_return_state; 1926 } 1927 spin_unlock(&state->owner->so_lock); 1928 rcu_read_lock(); 1929 delegation = nfs4_get_valid_delegation(state->inode); 1930 if (!can_open_delegated(delegation, fmode, claim)) { 1931 rcu_read_unlock(); 1932 break; 1933 } 1934 /* Save the delegation */ 1935 nfs4_stateid_copy(&stateid, &delegation->stateid); 1936 rcu_read_unlock(); 1937 nfs_release_seqid(opendata->o_arg.seqid); 1938 if (!opendata->is_recover) { 1939 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1940 if (ret != 0) 1941 goto out; 1942 } 1943 ret = -EAGAIN; 1944 1945 /* Try to update the stateid using the delegation */ 1946 if (update_open_stateid(state, NULL, &stateid, fmode)) 1947 goto out_return_state; 1948 } 1949out: 1950 return ERR_PTR(ret); 1951out_return_state: 1952 refcount_inc(&state->count); 1953 return state; 1954} 1955 1956static void 1957nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1958{ 1959 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1960 struct nfs_delegation *delegation; 1961 int delegation_flags = 0; 1962 1963 rcu_read_lock(); 1964 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1965 if (delegation) 1966 delegation_flags = delegation->flags; 1967 rcu_read_unlock(); 1968 switch (data->o_arg.claim) { 1969 default: 1970 break; 1971 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1972 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1973 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1974 "returning a delegation for " 1975 "OPEN(CLAIM_DELEGATE_CUR)\n", 1976 clp->cl_hostname); 1977 return; 1978 } 1979 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1980 nfs_inode_set_delegation(state->inode, 1981 data->owner->so_cred, 1982 data->o_res.delegation_type, 1983 &data->o_res.delegation, 1984 data->o_res.pagemod_limit); 1985 else 1986 nfs_inode_reclaim_delegation(state->inode, 1987 data->owner->so_cred, 1988 data->o_res.delegation_type, 1989 &data->o_res.delegation, 1990 data->o_res.pagemod_limit); 1991 1992 if (data->o_res.do_recall) 1993 nfs_async_inode_return_delegation(state->inode, 1994 &data->o_res.delegation); 1995} 1996 1997/* 1998 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1999 * and update the nfs4_state. 2000 */ 2001static struct nfs4_state * 2002_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 2003{ 2004 struct inode *inode = data->state->inode; 2005 struct nfs4_state *state = data->state; 2006 int ret; 2007 2008 if (!data->rpc_done) { 2009 if (data->rpc_status) 2010 return ERR_PTR(data->rpc_status); 2011 return nfs4_try_open_cached(data); 2012 } 2013 2014 ret = nfs_refresh_inode(inode, &data->f_attr); 2015 if (ret) 2016 return ERR_PTR(ret); 2017 2018 if (data->o_res.delegation_type != 0) 2019 nfs4_opendata_check_deleg(data, state); 2020 2021 if (!update_open_stateid(state, &data->o_res.stateid, 2022 NULL, data->o_arg.fmode)) 2023 return ERR_PTR(-EAGAIN); 2024 refcount_inc(&state->count); 2025 2026 return state; 2027} 2028 2029static struct inode * 2030nfs4_opendata_get_inode(struct nfs4_opendata *data) 2031{ 2032 struct inode *inode; 2033 2034 switch (data->o_arg.claim) { 2035 case NFS4_OPEN_CLAIM_NULL: 2036 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 2037 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 2038 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 2039 return ERR_PTR(-EAGAIN); 2040 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, 2041 &data->f_attr); 2042 break; 2043 default: 2044 inode = d_inode(data->dentry); 2045 ihold(inode); 2046 nfs_refresh_inode(inode, &data->f_attr); 2047 } 2048 return inode; 2049} 2050 2051static struct nfs4_state * 2052nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data) 2053{ 2054 struct nfs4_state *state; 2055 struct inode *inode; 2056 2057 inode = nfs4_opendata_get_inode(data); 2058 if (IS_ERR(inode)) 2059 return ERR_CAST(inode); 2060 if (data->state != NULL && data->state->inode == inode) { 2061 state = data->state; 2062 refcount_inc(&state->count); 2063 } else 2064 state = nfs4_get_open_state(inode, data->owner); 2065 iput(inode); 2066 if (state == NULL) 2067 state = ERR_PTR(-ENOMEM); 2068 return state; 2069} 2070 2071static struct nfs4_state * 2072_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2073{ 2074 struct nfs4_state *state; 2075 2076 if (!data->rpc_done) { 2077 state = nfs4_try_open_cached(data); 2078 trace_nfs4_cached_open(data->state); 2079 goto out; 2080 } 2081 2082 state = nfs4_opendata_find_nfs4_state(data); 2083 if (IS_ERR(state)) 2084 goto out; 2085 2086 if (data->o_res.delegation_type != 0) 2087 nfs4_opendata_check_deleg(data, state); 2088 if (!update_open_stateid(state, &data->o_res.stateid, 2089 NULL, data->o_arg.fmode)) { 2090 nfs4_put_open_state(state); 2091 state = ERR_PTR(-EAGAIN); 2092 } 2093out: 2094 nfs_release_seqid(data->o_arg.seqid); 2095 return state; 2096} 2097 2098static struct nfs4_state * 2099nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 2100{ 2101 struct nfs4_state *ret; 2102 2103 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 2104 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 2105 else 2106 ret = _nfs4_opendata_to_nfs4_state(data); 2107 nfs4_sequence_free_slot(&data->o_res.seq_res); 2108 return ret; 2109} 2110 2111static struct nfs_open_context * 2112nfs4_state_find_open_context_mode(struct nfs4_state *state, fmode_t mode) 2113{ 2114 struct nfs_inode *nfsi = NFS_I(state->inode); 2115 struct nfs_open_context *ctx; 2116 2117 rcu_read_lock(); 2118 list_for_each_entry_rcu(ctx, &nfsi->open_files, list) { 2119 if (ctx->state != state) 2120 continue; 2121 if ((ctx->mode & mode) != mode) 2122 continue; 2123 if (!get_nfs_open_context(ctx)) 2124 continue; 2125 rcu_read_unlock(); 2126 return ctx; 2127 } 2128 rcu_read_unlock(); 2129 return ERR_PTR(-ENOENT); 2130} 2131 2132static struct nfs_open_context * 2133nfs4_state_find_open_context(struct nfs4_state *state) 2134{ 2135 struct nfs_open_context *ctx; 2136 2137 ctx = nfs4_state_find_open_context_mode(state, FMODE_READ|FMODE_WRITE); 2138 if (!IS_ERR(ctx)) 2139 return ctx; 2140 ctx = nfs4_state_find_open_context_mode(state, FMODE_WRITE); 2141 if (!IS_ERR(ctx)) 2142 return ctx; 2143 return nfs4_state_find_open_context_mode(state, FMODE_READ); 2144} 2145 2146static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 2147 struct nfs4_state *state, enum open_claim_type4 claim) 2148{ 2149 struct nfs4_opendata *opendata; 2150 2151 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 2152 NULL, claim, GFP_NOFS); 2153 if (opendata == NULL) 2154 return ERR_PTR(-ENOMEM); 2155 opendata->state = state; 2156 refcount_inc(&state->count); 2157 return opendata; 2158} 2159 2160static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 2161 fmode_t fmode) 2162{ 2163 struct nfs4_state *newstate; 2164 struct nfs_server *server = NFS_SB(opendata->dentry->d_sb); 2165 int openflags = opendata->o_arg.open_flags; 2166 int ret; 2167 2168 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 2169 return 0; 2170 opendata->o_arg.fmode = fmode; 2171 opendata->o_arg.share_access = 2172 nfs4_map_atomic_open_share(server, fmode, openflags); 2173 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 2174 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 2175 nfs4_init_opendata_res(opendata); 2176 ret = _nfs4_recover_proc_open(opendata); 2177 if (ret != 0) 2178 return ret; 2179 newstate = nfs4_opendata_to_nfs4_state(opendata); 2180 if (IS_ERR(newstate)) 2181 return PTR_ERR(newstate); 2182 if (newstate != opendata->state) 2183 ret = -ESTALE; 2184 nfs4_close_state(newstate, fmode); 2185 return ret; 2186} 2187 2188static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 2189{ 2190 int ret; 2191 2192 /* memory barrier prior to reading state->n_* */ 2193 smp_rmb(); 2194 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2195 if (ret != 0) 2196 return ret; 2197 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2198 if (ret != 0) 2199 return ret; 2200 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 2201 if (ret != 0) 2202 return ret; 2203 /* 2204 * We may have performed cached opens for all three recoveries. 2205 * Check if we need to update the current stateid. 2206 */ 2207 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 2208 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 2209 write_seqlock(&state->seqlock); 2210 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2211 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2212 write_sequnlock(&state->seqlock); 2213 } 2214 return 0; 2215} 2216 2217/* 2218 * OPEN_RECLAIM: 2219 * reclaim state on the server after a reboot. 2220 */ 2221static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2222{ 2223 struct nfs_delegation *delegation; 2224 struct nfs4_opendata *opendata; 2225 fmode_t delegation_type = 0; 2226 int status; 2227 2228 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2229 NFS4_OPEN_CLAIM_PREVIOUS); 2230 if (IS_ERR(opendata)) 2231 return PTR_ERR(opendata); 2232 rcu_read_lock(); 2233 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2234 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 2235 delegation_type = delegation->type; 2236 rcu_read_unlock(); 2237 opendata->o_arg.u.delegation_type = delegation_type; 2238 status = nfs4_open_recover(opendata, state); 2239 nfs4_opendata_put(opendata); 2240 return status; 2241} 2242 2243static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 2244{ 2245 struct nfs_server *server = NFS_SERVER(state->inode); 2246 struct nfs4_exception exception = { }; 2247 int err; 2248 do { 2249 err = _nfs4_do_open_reclaim(ctx, state); 2250 trace_nfs4_open_reclaim(ctx, 0, err); 2251 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2252 continue; 2253 if (err != -NFS4ERR_DELAY) 2254 break; 2255 nfs4_handle_exception(server, err, &exception); 2256 } while (exception.retry); 2257 return err; 2258} 2259 2260static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 2261{ 2262 struct nfs_open_context *ctx; 2263 int ret; 2264 2265 ctx = nfs4_state_find_open_context(state); 2266 if (IS_ERR(ctx)) 2267 return -EAGAIN; 2268 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2269 nfs_state_clear_open_state_flags(state); 2270 ret = nfs4_do_open_reclaim(ctx, state); 2271 put_nfs_open_context(ctx); 2272 return ret; 2273} 2274 2275static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, struct file_lock *fl, int err) 2276{ 2277 switch (err) { 2278 default: 2279 printk(KERN_ERR "NFS: %s: unhandled error " 2280 "%d.\n", __func__, err); 2281 fallthrough; 2282 case 0: 2283 case -ENOENT: 2284 case -EAGAIN: 2285 case -ESTALE: 2286 case -ETIMEDOUT: 2287 break; 2288 case -NFS4ERR_BADSESSION: 2289 case -NFS4ERR_BADSLOT: 2290 case -NFS4ERR_BAD_HIGH_SLOT: 2291 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 2292 case -NFS4ERR_DEADSESSION: 2293 return -EAGAIN; 2294 case -NFS4ERR_STALE_CLIENTID: 2295 case -NFS4ERR_STALE_STATEID: 2296 /* Don't recall a delegation if it was lost */ 2297 nfs4_schedule_lease_recovery(server->nfs_client); 2298 return -EAGAIN; 2299 case -NFS4ERR_MOVED: 2300 nfs4_schedule_migration_recovery(server); 2301 return -EAGAIN; 2302 case -NFS4ERR_LEASE_MOVED: 2303 nfs4_schedule_lease_moved_recovery(server->nfs_client); 2304 return -EAGAIN; 2305 case -NFS4ERR_DELEG_REVOKED: 2306 case -NFS4ERR_ADMIN_REVOKED: 2307 case -NFS4ERR_EXPIRED: 2308 case -NFS4ERR_BAD_STATEID: 2309 case -NFS4ERR_OPENMODE: 2310 nfs_inode_find_state_and_recover(state->inode, 2311 stateid); 2312 nfs4_schedule_stateid_recovery(server, state); 2313 return -EAGAIN; 2314 case -NFS4ERR_DELAY: 2315 case -NFS4ERR_GRACE: 2316 ssleep(1); 2317 return -EAGAIN; 2318 case -ENOMEM: 2319 case -NFS4ERR_DENIED: 2320 if (fl) { 2321 struct nfs4_lock_state *lsp = fl->fl_u.nfs4_fl.owner; 2322 if (lsp) 2323 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2324 } 2325 return 0; 2326 } 2327 return err; 2328} 2329 2330int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 2331 struct nfs4_state *state, const nfs4_stateid *stateid) 2332{ 2333 struct nfs_server *server = NFS_SERVER(state->inode); 2334 struct nfs4_opendata *opendata; 2335 int err = 0; 2336 2337 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2338 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2339 if (IS_ERR(opendata)) 2340 return PTR_ERR(opendata); 2341 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2342 if (!test_bit(NFS_O_RDWR_STATE, &state->flags)) { 2343 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2344 if (err) 2345 goto out; 2346 } 2347 if (!test_bit(NFS_O_WRONLY_STATE, &state->flags)) { 2348 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2349 if (err) 2350 goto out; 2351 } 2352 if (!test_bit(NFS_O_RDONLY_STATE, &state->flags)) { 2353 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2354 if (err) 2355 goto out; 2356 } 2357 nfs_state_clear_delegation(state); 2358out: 2359 nfs4_opendata_put(opendata); 2360 return nfs4_handle_delegation_recall_error(server, state, stateid, NULL, err); 2361} 2362 2363static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2364{ 2365 struct nfs4_opendata *data = calldata; 2366 2367 nfs4_setup_sequence(data->o_arg.server->nfs_client, 2368 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2369} 2370 2371static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2372{ 2373 struct nfs4_opendata *data = calldata; 2374 2375 nfs40_sequence_done(task, &data->c_res.seq_res); 2376 2377 data->rpc_status = task->tk_status; 2378 if (data->rpc_status == 0) { 2379 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2380 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2381 renew_lease(data->o_res.server, data->timestamp); 2382 data->rpc_done = true; 2383 } 2384} 2385 2386static void nfs4_open_confirm_release(void *calldata) 2387{ 2388 struct nfs4_opendata *data = calldata; 2389 struct nfs4_state *state = NULL; 2390 2391 /* If this request hasn't been cancelled, do nothing */ 2392 if (!data->cancelled) 2393 goto out_free; 2394 /* In case of error, no cleanup! */ 2395 if (!data->rpc_done) 2396 goto out_free; 2397 state = nfs4_opendata_to_nfs4_state(data); 2398 if (!IS_ERR(state)) 2399 nfs4_close_state(state, data->o_arg.fmode); 2400out_free: 2401 nfs4_opendata_put(data); 2402} 2403 2404static const struct rpc_call_ops nfs4_open_confirm_ops = { 2405 .rpc_call_prepare = nfs4_open_confirm_prepare, 2406 .rpc_call_done = nfs4_open_confirm_done, 2407 .rpc_release = nfs4_open_confirm_release, 2408}; 2409 2410/* 2411 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2412 */ 2413static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2414{ 2415 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2416 struct rpc_task *task; 2417 struct rpc_message msg = { 2418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2419 .rpc_argp = &data->c_arg, 2420 .rpc_resp = &data->c_res, 2421 .rpc_cred = data->owner->so_cred, 2422 }; 2423 struct rpc_task_setup task_setup_data = { 2424 .rpc_client = server->client, 2425 .rpc_message = &msg, 2426 .callback_ops = &nfs4_open_confirm_ops, 2427 .callback_data = data, 2428 .workqueue = nfsiod_workqueue, 2429 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2430 }; 2431 int status; 2432 2433 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1, 2434 data->is_recover); 2435 kref_get(&data->kref); 2436 data->rpc_done = false; 2437 data->rpc_status = 0; 2438 data->timestamp = jiffies; 2439 task = rpc_run_task(&task_setup_data); 2440 if (IS_ERR(task)) 2441 return PTR_ERR(task); 2442 status = rpc_wait_for_completion_task(task); 2443 if (status != 0) { 2444 data->cancelled = true; 2445 smp_wmb(); 2446 } else 2447 status = data->rpc_status; 2448 rpc_put_task(task); 2449 return status; 2450} 2451 2452static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2453{ 2454 struct nfs4_opendata *data = calldata; 2455 struct nfs4_state_owner *sp = data->owner; 2456 struct nfs_client *clp = sp->so_server->nfs_client; 2457 enum open_claim_type4 claim = data->o_arg.claim; 2458 2459 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2460 goto out_wait; 2461 /* 2462 * Check if we still need to send an OPEN call, or if we can use 2463 * a delegation instead. 2464 */ 2465 if (data->state != NULL) { 2466 struct nfs_delegation *delegation; 2467 2468 if (can_open_cached(data->state, data->o_arg.fmode, 2469 data->o_arg.open_flags, claim)) 2470 goto out_no_action; 2471 rcu_read_lock(); 2472 delegation = nfs4_get_valid_delegation(data->state->inode); 2473 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2474 goto unlock_no_action; 2475 rcu_read_unlock(); 2476 } 2477 /* Update client id. */ 2478 data->o_arg.clientid = clp->cl_clientid; 2479 switch (claim) { 2480 default: 2481 break; 2482 case NFS4_OPEN_CLAIM_PREVIOUS: 2483 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2484 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2485 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2486 fallthrough; 2487 case NFS4_OPEN_CLAIM_FH: 2488 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2489 } 2490 data->timestamp = jiffies; 2491 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2492 &data->o_arg.seq_args, 2493 &data->o_res.seq_res, 2494 task) != 0) 2495 nfs_release_seqid(data->o_arg.seqid); 2496 2497 /* Set the create mode (note dependency on the session type) */ 2498 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2499 if (data->o_arg.open_flags & O_EXCL) { 2500 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2501 if (clp->cl_mvops->minor_version == 0) { 2502 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2503 /* don't put an ACCESS op in OPEN compound if O_EXCL, 2504 * because ACCESS will return permission denied for 2505 * all bits until close */ 2506 data->o_res.access_request = data->o_arg.access = 0; 2507 } else if (nfs4_has_persistent_session(clp)) 2508 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2509 } 2510 return; 2511unlock_no_action: 2512 trace_nfs4_cached_open(data->state); 2513 rcu_read_unlock(); 2514out_no_action: 2515 task->tk_action = NULL; 2516out_wait: 2517 nfs4_sequence_done(task, &data->o_res.seq_res); 2518} 2519 2520static void nfs4_open_done(struct rpc_task *task, void *calldata) 2521{ 2522 struct nfs4_opendata *data = calldata; 2523 2524 data->rpc_status = task->tk_status; 2525 2526 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2527 return; 2528 2529 if (task->tk_status == 0) { 2530 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2531 switch (data->o_res.f_attr->mode & S_IFMT) { 2532 case S_IFREG: 2533 break; 2534 case S_IFLNK: 2535 data->rpc_status = -ELOOP; 2536 break; 2537 case S_IFDIR: 2538 data->rpc_status = -EISDIR; 2539 break; 2540 default: 2541 data->rpc_status = -ENOTDIR; 2542 } 2543 } 2544 renew_lease(data->o_res.server, data->timestamp); 2545 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2546 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2547 } 2548 data->rpc_done = true; 2549} 2550 2551static void nfs4_open_release(void *calldata) 2552{ 2553 struct nfs4_opendata *data = calldata; 2554 struct nfs4_state *state = NULL; 2555 2556 /* If this request hasn't been cancelled, do nothing */ 2557 if (!data->cancelled) 2558 goto out_free; 2559 /* In case of error, no cleanup! */ 2560 if (data->rpc_status != 0 || !data->rpc_done) 2561 goto out_free; 2562 /* In case we need an open_confirm, no cleanup! */ 2563 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2564 goto out_free; 2565 state = nfs4_opendata_to_nfs4_state(data); 2566 if (!IS_ERR(state)) 2567 nfs4_close_state(state, data->o_arg.fmode); 2568out_free: 2569 nfs4_opendata_put(data); 2570} 2571 2572static const struct rpc_call_ops nfs4_open_ops = { 2573 .rpc_call_prepare = nfs4_open_prepare, 2574 .rpc_call_done = nfs4_open_done, 2575 .rpc_release = nfs4_open_release, 2576}; 2577 2578static int nfs4_run_open_task(struct nfs4_opendata *data, 2579 struct nfs_open_context *ctx) 2580{ 2581 struct inode *dir = d_inode(data->dir); 2582 struct nfs_server *server = NFS_SERVER(dir); 2583 struct nfs_openargs *o_arg = &data->o_arg; 2584 struct nfs_openres *o_res = &data->o_res; 2585 struct rpc_task *task; 2586 struct rpc_message msg = { 2587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2588 .rpc_argp = o_arg, 2589 .rpc_resp = o_res, 2590 .rpc_cred = data->owner->so_cred, 2591 }; 2592 struct rpc_task_setup task_setup_data = { 2593 .rpc_client = server->client, 2594 .rpc_message = &msg, 2595 .callback_ops = &nfs4_open_ops, 2596 .callback_data = data, 2597 .workqueue = nfsiod_workqueue, 2598 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 2599 }; 2600 int status; 2601 2602 if (nfs_server_capable(dir, NFS_CAP_MOVEABLE)) 2603 task_setup_data.flags |= RPC_TASK_MOVEABLE; 2604 2605 kref_get(&data->kref); 2606 data->rpc_done = false; 2607 data->rpc_status = 0; 2608 data->cancelled = false; 2609 data->is_recover = false; 2610 if (!ctx) { 2611 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 1); 2612 data->is_recover = true; 2613 task_setup_data.flags |= RPC_TASK_TIMEOUT; 2614 } else { 2615 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1, 0); 2616 pnfs_lgopen_prepare(data, ctx); 2617 } 2618 task = rpc_run_task(&task_setup_data); 2619 if (IS_ERR(task)) 2620 return PTR_ERR(task); 2621 status = rpc_wait_for_completion_task(task); 2622 if (status != 0) { 2623 data->cancelled = true; 2624 smp_wmb(); 2625 } else 2626 status = data->rpc_status; 2627 rpc_put_task(task); 2628 2629 return status; 2630} 2631 2632static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2633{ 2634 struct inode *dir = d_inode(data->dir); 2635 struct nfs_openres *o_res = &data->o_res; 2636 int status; 2637 2638 status = nfs4_run_open_task(data, NULL); 2639 if (status != 0 || !data->rpc_done) 2640 return status; 2641 2642 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2643 2644 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2645 status = _nfs4_proc_open_confirm(data); 2646 2647 return status; 2648} 2649 2650/* 2651 * Additional permission checks in order to distinguish between an 2652 * open for read, and an open for execute. This works around the 2653 * fact that NFSv4 OPEN treats read and execute permissions as being 2654 * the same. 2655 * Note that in the non-execute case, we want to turn off permission 2656 * checking if we just created a new file (POSIX open() semantics). 2657 */ 2658static int nfs4_opendata_access(const struct cred *cred, 2659 struct nfs4_opendata *opendata, 2660 struct nfs4_state *state, fmode_t fmode) 2661{ 2662 struct nfs_access_entry cache; 2663 u32 mask, flags; 2664 2665 /* access call failed or for some reason the server doesn't 2666 * support any access modes -- defer access call until later */ 2667 if (opendata->o_res.access_supported == 0) 2668 return 0; 2669 2670 mask = 0; 2671 if (fmode & FMODE_EXEC) { 2672 /* ONLY check for exec rights */ 2673 if (S_ISDIR(state->inode->i_mode)) 2674 mask = NFS4_ACCESS_LOOKUP; 2675 else 2676 mask = NFS4_ACCESS_EXECUTE; 2677 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2678 mask = NFS4_ACCESS_READ; 2679 2680 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2681 nfs_access_add_cache(state->inode, &cache, cred); 2682 2683 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2684 if ((mask & ~cache.mask & flags) == 0) 2685 return 0; 2686 2687 return -EACCES; 2688} 2689 2690/* 2691 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2692 */ 2693static int _nfs4_proc_open(struct nfs4_opendata *data, 2694 struct nfs_open_context *ctx) 2695{ 2696 struct inode *dir = d_inode(data->dir); 2697 struct nfs_server *server = NFS_SERVER(dir); 2698 struct nfs_openargs *o_arg = &data->o_arg; 2699 struct nfs_openres *o_res = &data->o_res; 2700 int status; 2701 2702 status = nfs4_run_open_task(data, ctx); 2703 if (!data->rpc_done) 2704 return status; 2705 if (status != 0) { 2706 if (status == -NFS4ERR_BADNAME && 2707 !(o_arg->open_flags & O_CREAT)) 2708 return -ENOENT; 2709 return status; 2710 } 2711 2712 nfs_fattr_map_and_free_names(server, &data->f_attr); 2713 2714 if (o_arg->open_flags & O_CREAT) { 2715 if (o_arg->open_flags & O_EXCL) 2716 data->file_created = true; 2717 else if (o_res->cinfo.before != o_res->cinfo.after) 2718 data->file_created = true; 2719 if (data->file_created || 2720 inode_peek_iversion_raw(dir) != o_res->cinfo.after) 2721 nfs4_update_changeattr(dir, &o_res->cinfo, 2722 o_res->f_attr->time_start, 2723 NFS_INO_INVALID_DATA); 2724 } 2725 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2726 server->caps &= ~NFS_CAP_POSIX_LOCK; 2727 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2728 status = _nfs4_proc_open_confirm(data); 2729 if (status != 0) 2730 return status; 2731 } 2732 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2733 struct nfs_fh *fh = &o_res->fh; 2734 2735 nfs4_sequence_free_slot(&o_res->seq_res); 2736 if (o_arg->claim == NFS4_OPEN_CLAIM_FH) 2737 fh = NFS_FH(d_inode(data->dentry)); 2738 nfs4_proc_getattr(server, fh, o_res->f_attr, NULL); 2739 } 2740 return 0; 2741} 2742 2743/* 2744 * OPEN_EXPIRED: 2745 * reclaim state on the server after a network partition. 2746 * Assumes caller holds the appropriate lock 2747 */ 2748static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2749{ 2750 struct nfs4_opendata *opendata; 2751 int ret; 2752 2753 opendata = nfs4_open_recoverdata_alloc(ctx, state, NFS4_OPEN_CLAIM_FH); 2754 if (IS_ERR(opendata)) 2755 return PTR_ERR(opendata); 2756 /* 2757 * We're not recovering a delegation, so ask for no delegation. 2758 * Otherwise the recovery thread could deadlock with an outstanding 2759 * delegation return. 2760 */ 2761 opendata->o_arg.open_flags = O_DIRECT; 2762 ret = nfs4_open_recover(opendata, state); 2763 if (ret == -ESTALE) 2764 d_drop(ctx->dentry); 2765 nfs4_opendata_put(opendata); 2766 return ret; 2767} 2768 2769static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2770{ 2771 struct nfs_server *server = NFS_SERVER(state->inode); 2772 struct nfs4_exception exception = { }; 2773 int err; 2774 2775 do { 2776 err = _nfs4_open_expired(ctx, state); 2777 trace_nfs4_open_expired(ctx, 0, err); 2778 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2779 continue; 2780 switch (err) { 2781 default: 2782 goto out; 2783 case -NFS4ERR_GRACE: 2784 case -NFS4ERR_DELAY: 2785 nfs4_handle_exception(server, err, &exception); 2786 err = 0; 2787 } 2788 } while (exception.retry); 2789out: 2790 return err; 2791} 2792 2793static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2794{ 2795 struct nfs_open_context *ctx; 2796 int ret; 2797 2798 ctx = nfs4_state_find_open_context(state); 2799 if (IS_ERR(ctx)) 2800 return -EAGAIN; 2801 ret = nfs4_do_open_expired(ctx, state); 2802 put_nfs_open_context(ctx); 2803 return ret; 2804} 2805 2806static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2807 const nfs4_stateid *stateid) 2808{ 2809 nfs_remove_bad_delegation(state->inode, stateid); 2810 nfs_state_clear_delegation(state); 2811} 2812 2813static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2814{ 2815 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2816 nfs_finish_clear_delegation_stateid(state, NULL); 2817} 2818 2819static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2820{ 2821 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2822 nfs40_clear_delegation_stateid(state); 2823 nfs_state_clear_open_state_flags(state); 2824 return nfs4_open_expired(sp, state); 2825} 2826 2827static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2828 nfs4_stateid *stateid, 2829 const struct cred *cred) 2830{ 2831 return -NFS4ERR_BAD_STATEID; 2832} 2833 2834#if defined(CONFIG_NFS_V4_1) 2835static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2836 nfs4_stateid *stateid, 2837 const struct cred *cred) 2838{ 2839 int status; 2840 2841 switch (stateid->type) { 2842 default: 2843 break; 2844 case NFS4_INVALID_STATEID_TYPE: 2845 case NFS4_SPECIAL_STATEID_TYPE: 2846 return -NFS4ERR_BAD_STATEID; 2847 case NFS4_REVOKED_STATEID_TYPE: 2848 goto out_free; 2849 } 2850 2851 status = nfs41_test_stateid(server, stateid, cred); 2852 switch (status) { 2853 case -NFS4ERR_EXPIRED: 2854 case -NFS4ERR_ADMIN_REVOKED: 2855 case -NFS4ERR_DELEG_REVOKED: 2856 break; 2857 default: 2858 return status; 2859 } 2860out_free: 2861 /* Ack the revoked state to the server */ 2862 nfs41_free_stateid(server, stateid, cred, true); 2863 return -NFS4ERR_EXPIRED; 2864} 2865 2866static int nfs41_check_delegation_stateid(struct nfs4_state *state) 2867{ 2868 struct nfs_server *server = NFS_SERVER(state->inode); 2869 nfs4_stateid stateid; 2870 struct nfs_delegation *delegation; 2871 const struct cred *cred = NULL; 2872 int status, ret = NFS_OK; 2873 2874 /* Get the delegation credential for use by test/free_stateid */ 2875 rcu_read_lock(); 2876 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2877 if (delegation == NULL) { 2878 rcu_read_unlock(); 2879 nfs_state_clear_delegation(state); 2880 return NFS_OK; 2881 } 2882 2883 spin_lock(&delegation->lock); 2884 nfs4_stateid_copy(&stateid, &delegation->stateid); 2885 2886 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2887 &delegation->flags)) { 2888 spin_unlock(&delegation->lock); 2889 rcu_read_unlock(); 2890 return NFS_OK; 2891 } 2892 2893 if (delegation->cred) 2894 cred = get_cred(delegation->cred); 2895 spin_unlock(&delegation->lock); 2896 rcu_read_unlock(); 2897 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2898 trace_nfs4_test_delegation_stateid(state, NULL, status); 2899 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2900 nfs_finish_clear_delegation_stateid(state, &stateid); 2901 else 2902 ret = status; 2903 2904 put_cred(cred); 2905 return ret; 2906} 2907 2908static void nfs41_delegation_recover_stateid(struct nfs4_state *state) 2909{ 2910 nfs4_stateid tmp; 2911 2912 if (test_bit(NFS_DELEGATED_STATE, &state->flags) && 2913 nfs4_copy_delegation_stateid(state->inode, state->state, 2914 &tmp, NULL) && 2915 nfs4_stateid_match_other(&state->stateid, &tmp)) 2916 nfs_state_set_delegation(state, &tmp, state->state); 2917 else 2918 nfs_state_clear_delegation(state); 2919} 2920 2921/** 2922 * nfs41_check_expired_locks - possibly free a lock stateid 2923 * 2924 * @state: NFSv4 state for an inode 2925 * 2926 * Returns NFS_OK if recovery for this stateid is now finished. 2927 * Otherwise a negative NFS4ERR value is returned. 2928 */ 2929static int nfs41_check_expired_locks(struct nfs4_state *state) 2930{ 2931 int status, ret = NFS_OK; 2932 struct nfs4_lock_state *lsp, *prev = NULL; 2933 struct nfs_server *server = NFS_SERVER(state->inode); 2934 2935 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2936 goto out; 2937 2938 spin_lock(&state->state_lock); 2939 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2940 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2941 const struct cred *cred = lsp->ls_state->owner->so_cred; 2942 2943 refcount_inc(&lsp->ls_count); 2944 spin_unlock(&state->state_lock); 2945 2946 nfs4_put_lock_state(prev); 2947 prev = lsp; 2948 2949 status = nfs41_test_and_free_expired_stateid(server, 2950 &lsp->ls_stateid, 2951 cred); 2952 trace_nfs4_test_lock_stateid(state, lsp, status); 2953 if (status == -NFS4ERR_EXPIRED || 2954 status == -NFS4ERR_BAD_STATEID) { 2955 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2956 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2957 if (!recover_lost_locks) 2958 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2959 } else if (status != NFS_OK) { 2960 ret = status; 2961 nfs4_put_lock_state(prev); 2962 goto out; 2963 } 2964 spin_lock(&state->state_lock); 2965 } 2966 } 2967 spin_unlock(&state->state_lock); 2968 nfs4_put_lock_state(prev); 2969out: 2970 return ret; 2971} 2972 2973/** 2974 * nfs41_check_open_stateid - possibly free an open stateid 2975 * 2976 * @state: NFSv4 state for an inode 2977 * 2978 * Returns NFS_OK if recovery for this stateid is now finished. 2979 * Otherwise a negative NFS4ERR value is returned. 2980 */ 2981static int nfs41_check_open_stateid(struct nfs4_state *state) 2982{ 2983 struct nfs_server *server = NFS_SERVER(state->inode); 2984 nfs4_stateid *stateid = &state->open_stateid; 2985 const struct cred *cred = state->owner->so_cred; 2986 int status; 2987 2988 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) 2989 return -NFS4ERR_BAD_STATEID; 2990 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2991 trace_nfs4_test_open_stateid(state, NULL, status); 2992 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2993 nfs_state_clear_open_state_flags(state); 2994 stateid->type = NFS4_INVALID_STATEID_TYPE; 2995 return status; 2996 } 2997 if (nfs_open_stateid_recover_openmode(state)) 2998 return -NFS4ERR_OPENMODE; 2999 return NFS_OK; 3000} 3001 3002static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 3003{ 3004 int status; 3005 3006 status = nfs41_check_delegation_stateid(state); 3007 if (status != NFS_OK) 3008 return status; 3009 nfs41_delegation_recover_stateid(state); 3010 3011 status = nfs41_check_expired_locks(state); 3012 if (status != NFS_OK) 3013 return status; 3014 status = nfs41_check_open_stateid(state); 3015 if (status != NFS_OK) 3016 status = nfs4_open_expired(sp, state); 3017 return status; 3018} 3019#endif 3020 3021/* 3022 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 3023 * fields corresponding to attributes that were used to store the verifier. 3024 * Make sure we clobber those fields in the later setattr call 3025 */ 3026static unsigned nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 3027 struct iattr *sattr, struct nfs4_label **label) 3028{ 3029 const __u32 *bitmask = opendata->o_arg.server->exclcreat_bitmask; 3030 __u32 attrset[3]; 3031 unsigned ret; 3032 unsigned i; 3033 3034 for (i = 0; i < ARRAY_SIZE(attrset); i++) { 3035 attrset[i] = opendata->o_res.attrset[i]; 3036 if (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE4_1) 3037 attrset[i] &= ~bitmask[i]; 3038 } 3039 3040 ret = (opendata->o_arg.createmode == NFS4_CREATE_EXCLUSIVE) ? 3041 sattr->ia_valid : 0; 3042 3043 if ((attrset[1] & (FATTR4_WORD1_TIME_ACCESS|FATTR4_WORD1_TIME_ACCESS_SET))) { 3044 if (sattr->ia_valid & ATTR_ATIME_SET) 3045 ret |= ATTR_ATIME_SET; 3046 else 3047 ret |= ATTR_ATIME; 3048 } 3049 3050 if ((attrset[1] & (FATTR4_WORD1_TIME_MODIFY|FATTR4_WORD1_TIME_MODIFY_SET))) { 3051 if (sattr->ia_valid & ATTR_MTIME_SET) 3052 ret |= ATTR_MTIME_SET; 3053 else 3054 ret |= ATTR_MTIME; 3055 } 3056 3057 if (!(attrset[2] & FATTR4_WORD2_SECURITY_LABEL)) 3058 *label = NULL; 3059 return ret; 3060} 3061 3062static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 3063 struct nfs_open_context *ctx) 3064{ 3065 struct nfs4_state_owner *sp = opendata->owner; 3066 struct nfs_server *server = sp->so_server; 3067 struct dentry *dentry; 3068 struct nfs4_state *state; 3069 fmode_t acc_mode = _nfs4_ctx_to_accessmode(ctx); 3070 struct inode *dir = d_inode(opendata->dir); 3071 unsigned long dir_verifier; 3072 int ret; 3073 3074 dir_verifier = nfs_save_change_attribute(dir); 3075 3076 ret = _nfs4_proc_open(opendata, ctx); 3077 if (ret != 0) 3078 goto out; 3079 3080 state = _nfs4_opendata_to_nfs4_state(opendata); 3081 ret = PTR_ERR(state); 3082 if (IS_ERR(state)) 3083 goto out; 3084 ctx->state = state; 3085 if (server->caps & NFS_CAP_POSIX_LOCK) 3086 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 3087 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 3088 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 3089 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_PRESERVE_UNLINKED) 3090 set_bit(NFS_INO_PRESERVE_UNLINKED, &NFS_I(state->inode)->flags); 3091 3092 dentry = opendata->dentry; 3093 if (d_really_is_negative(dentry)) { 3094 struct dentry *alias; 3095 d_drop(dentry); 3096 alias = d_exact_alias(dentry, state->inode); 3097 if (!alias) 3098 alias = d_splice_alias(igrab(state->inode), dentry); 3099 /* d_splice_alias() can't fail here - it's a non-directory */ 3100 if (alias) { 3101 dput(ctx->dentry); 3102 ctx->dentry = dentry = alias; 3103 } 3104 } 3105 3106 switch(opendata->o_arg.claim) { 3107 default: 3108 break; 3109 case NFS4_OPEN_CLAIM_NULL: 3110 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 3111 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 3112 if (!opendata->rpc_done) 3113 break; 3114 if (opendata->o_res.delegation_type != 0) 3115 dir_verifier = nfs_save_change_attribute(dir); 3116 nfs_set_verifier(dentry, dir_verifier); 3117 } 3118 3119 /* Parse layoutget results before we check for access */ 3120 pnfs_parse_lgopen(state->inode, opendata->lgp, ctx); 3121 3122 ret = nfs4_opendata_access(sp->so_cred, opendata, state, acc_mode); 3123 if (ret != 0) 3124 goto out; 3125 3126 if (d_inode(dentry) == state->inode) 3127 nfs_inode_attach_open_context(ctx); 3128 3129out: 3130 if (!opendata->cancelled) { 3131 if (opendata->lgp) { 3132 nfs4_lgopen_release(opendata->lgp); 3133 opendata->lgp = NULL; 3134 } 3135 nfs4_sequence_free_slot(&opendata->o_res.seq_res); 3136 } 3137 return ret; 3138} 3139 3140/* 3141 * Returns a referenced nfs4_state 3142 */ 3143static int _nfs4_do_open(struct inode *dir, 3144 struct nfs_open_context *ctx, 3145 int flags, 3146 const struct nfs4_open_createattrs *c, 3147 int *opened) 3148{ 3149 struct nfs4_state_owner *sp; 3150 struct nfs4_state *state = NULL; 3151 struct nfs_server *server = NFS_SERVER(dir); 3152 struct nfs4_opendata *opendata; 3153 struct dentry *dentry = ctx->dentry; 3154 const struct cred *cred = ctx->cred; 3155 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 3156 fmode_t fmode = _nfs4_ctx_to_openmode(ctx); 3157 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 3158 struct iattr *sattr = c->sattr; 3159 struct nfs4_label *label = c->label; 3160 int status; 3161 3162 /* Protect against reboot recovery conflicts */ 3163 status = -ENOMEM; 3164 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 3165 if (sp == NULL) { 3166 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 3167 goto out_err; 3168 } 3169 status = nfs4_client_recover_expired_lease(server->nfs_client); 3170 if (status != 0) 3171 goto err_put_state_owner; 3172 if (d_really_is_positive(dentry)) 3173 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 3174 status = -ENOMEM; 3175 if (d_really_is_positive(dentry)) 3176 claim = NFS4_OPEN_CLAIM_FH; 3177 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, 3178 c, claim, GFP_KERNEL); 3179 if (opendata == NULL) 3180 goto err_put_state_owner; 3181 3182 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 3183 if (!opendata->f_attr.mdsthreshold) { 3184 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 3185 if (!opendata->f_attr.mdsthreshold) 3186 goto err_opendata_put; 3187 } 3188 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 3189 } 3190 if (d_really_is_positive(dentry)) 3191 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 3192 3193 status = _nfs4_open_and_get_state(opendata, ctx); 3194 if (status != 0) 3195 goto err_opendata_put; 3196 state = ctx->state; 3197 3198 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 3199 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 3200 unsigned attrs = nfs4_exclusive_attrset(opendata, sattr, &label); 3201 /* 3202 * send create attributes which was not set by open 3203 * with an extra setattr. 3204 */ 3205 if (attrs || label) { 3206 unsigned ia_old = sattr->ia_valid; 3207 3208 sattr->ia_valid = attrs; 3209 nfs_fattr_init(opendata->o_res.f_attr); 3210 status = nfs4_do_setattr(state->inode, cred, 3211 opendata->o_res.f_attr, sattr, 3212 ctx, label); 3213 if (status == 0) { 3214 nfs_setattr_update_inode(state->inode, sattr, 3215 opendata->o_res.f_attr); 3216 nfs_setsecurity(state->inode, opendata->o_res.f_attr); 3217 } 3218 sattr->ia_valid = ia_old; 3219 } 3220 } 3221 if (opened && opendata->file_created) 3222 *opened = 1; 3223 3224 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 3225 *ctx_th = opendata->f_attr.mdsthreshold; 3226 opendata->f_attr.mdsthreshold = NULL; 3227 } 3228 3229 nfs4_opendata_put(opendata); 3230 nfs4_put_state_owner(sp); 3231 return 0; 3232err_opendata_put: 3233 nfs4_opendata_put(opendata); 3234err_put_state_owner: 3235 nfs4_put_state_owner(sp); 3236out_err: 3237 return status; 3238} 3239 3240 3241static struct nfs4_state *nfs4_do_open(struct inode *dir, 3242 struct nfs_open_context *ctx, 3243 int flags, 3244 struct iattr *sattr, 3245 struct nfs4_label *label, 3246 int *opened) 3247{ 3248 struct nfs_server *server = NFS_SERVER(dir); 3249 struct nfs4_exception exception = { 3250 .interruptible = true, 3251 }; 3252 struct nfs4_state *res; 3253 struct nfs4_open_createattrs c = { 3254 .label = label, 3255 .sattr = sattr, 3256 .verf = { 3257 [0] = (__u32)jiffies, 3258 [1] = (__u32)current->pid, 3259 }, 3260 }; 3261 int status; 3262 3263 do { 3264 status = _nfs4_do_open(dir, ctx, flags, &c, opened); 3265 res = ctx->state; 3266 trace_nfs4_open_file(ctx, flags, status); 3267 if (status == 0) 3268 break; 3269 /* NOTE: BAD_SEQID means the server and client disagree about the 3270 * book-keeping w.r.t. state-changing operations 3271 * (OPEN/CLOSE/LOCK/LOCKU...) 3272 * It is actually a sign of a bug on the client or on the server. 3273 * 3274 * If we receive a BAD_SEQID error in the particular case of 3275 * doing an OPEN, we assume that nfs_increment_open_seqid() will 3276 * have unhashed the old state_owner for us, and that we can 3277 * therefore safely retry using a new one. We should still warn 3278 * the user though... 3279 */ 3280 if (status == -NFS4ERR_BAD_SEQID) { 3281 pr_warn_ratelimited("NFS: v4 server %s " 3282 " returned a bad sequence-id error!\n", 3283 NFS_SERVER(dir)->nfs_client->cl_hostname); 3284 exception.retry = 1; 3285 continue; 3286 } 3287 /* 3288 * BAD_STATEID on OPEN means that the server cancelled our 3289 * state before it received the OPEN_CONFIRM. 3290 * Recover by retrying the request as per the discussion 3291 * on Page 181 of RFC3530. 3292 */ 3293 if (status == -NFS4ERR_BAD_STATEID) { 3294 exception.retry = 1; 3295 continue; 3296 } 3297 if (status == -NFS4ERR_EXPIRED) { 3298 nfs4_schedule_lease_recovery(server->nfs_client); 3299 exception.retry = 1; 3300 continue; 3301 } 3302 if (status == -EAGAIN) { 3303 /* We must have found a delegation */ 3304 exception.retry = 1; 3305 continue; 3306 } 3307 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 3308 continue; 3309 res = ERR_PTR(nfs4_handle_exception(server, 3310 status, &exception)); 3311 } while (exception.retry); 3312 return res; 3313} 3314 3315static int _nfs4_do_setattr(struct inode *inode, 3316 struct nfs_setattrargs *arg, 3317 struct nfs_setattrres *res, 3318 const struct cred *cred, 3319 struct nfs_open_context *ctx) 3320{ 3321 struct nfs_server *server = NFS_SERVER(inode); 3322 struct rpc_message msg = { 3323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 3324 .rpc_argp = arg, 3325 .rpc_resp = res, 3326 .rpc_cred = cred, 3327 }; 3328 const struct cred *delegation_cred = NULL; 3329 unsigned long timestamp = jiffies; 3330 bool truncate; 3331 int status; 3332 3333 nfs_fattr_init(res->fattr); 3334 3335 /* Servers should only apply open mode checks for file size changes */ 3336 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 3337 if (!truncate) { 3338 nfs4_inode_make_writeable(inode); 3339 goto zero_stateid; 3340 } 3341 3342 if (nfs4_copy_delegation_stateid(inode, FMODE_WRITE, &arg->stateid, &delegation_cred)) { 3343 /* Use that stateid */ 3344 } else if (ctx != NULL && ctx->state) { 3345 struct nfs_lock_context *l_ctx; 3346 if (!nfs4_valid_open_stateid(ctx->state)) 3347 return -EBADF; 3348 l_ctx = nfs_get_lock_context(ctx); 3349 if (IS_ERR(l_ctx)) 3350 return PTR_ERR(l_ctx); 3351 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 3352 &arg->stateid, &delegation_cred); 3353 nfs_put_lock_context(l_ctx); 3354 if (status == -EIO) 3355 return -EBADF; 3356 else if (status == -EAGAIN) 3357 goto zero_stateid; 3358 } else { 3359zero_stateid: 3360 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 3361 } 3362 if (delegation_cred) 3363 msg.rpc_cred = delegation_cred; 3364 3365 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 3366 3367 put_cred(delegation_cred); 3368 if (status == 0 && ctx != NULL) 3369 renew_lease(server, timestamp); 3370 trace_nfs4_setattr(inode, &arg->stateid, status); 3371 return status; 3372} 3373 3374static int nfs4_do_setattr(struct inode *inode, const struct cred *cred, 3375 struct nfs_fattr *fattr, struct iattr *sattr, 3376 struct nfs_open_context *ctx, struct nfs4_label *ilabel) 3377{ 3378 struct nfs_server *server = NFS_SERVER(inode); 3379 __u32 bitmask[NFS4_BITMASK_SZ]; 3380 struct nfs4_state *state = ctx ? ctx->state : NULL; 3381 struct nfs_setattrargs arg = { 3382 .fh = NFS_FH(inode), 3383 .iap = sattr, 3384 .server = server, 3385 .bitmask = bitmask, 3386 .label = ilabel, 3387 }; 3388 struct nfs_setattrres res = { 3389 .fattr = fattr, 3390 .server = server, 3391 }; 3392 struct nfs4_exception exception = { 3393 .state = state, 3394 .inode = inode, 3395 .stateid = &arg.stateid, 3396 }; 3397 unsigned long adjust_flags = NFS_INO_INVALID_CHANGE; 3398 int err; 3399 3400 if (sattr->ia_valid & (ATTR_MODE | ATTR_KILL_SUID | ATTR_KILL_SGID)) 3401 adjust_flags |= NFS_INO_INVALID_MODE; 3402 if (sattr->ia_valid & (ATTR_UID | ATTR_GID)) 3403 adjust_flags |= NFS_INO_INVALID_OTHER; 3404 3405 do { 3406 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), 3407 inode, adjust_flags); 3408 3409 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 3410 switch (err) { 3411 case -NFS4ERR_OPENMODE: 3412 if (!(sattr->ia_valid & ATTR_SIZE)) { 3413 pr_warn_once("NFSv4: server %s is incorrectly " 3414 "applying open mode checks to " 3415 "a SETATTR that is not " 3416 "changing file size.\n", 3417 server->nfs_client->cl_hostname); 3418 } 3419 if (state && !(state->state & FMODE_WRITE)) { 3420 err = -EBADF; 3421 if (sattr->ia_valid & ATTR_OPEN) 3422 err = -EACCES; 3423 goto out; 3424 } 3425 } 3426 err = nfs4_handle_exception(server, err, &exception); 3427 } while (exception.retry); 3428out: 3429 return err; 3430} 3431 3432static bool 3433nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3434{ 3435 if (inode == NULL || !nfs_have_layout(inode)) 3436 return false; 3437 3438 return pnfs_wait_on_layoutreturn(inode, task); 3439} 3440 3441/* 3442 * Update the seqid of an open stateid 3443 */ 3444static void nfs4_sync_open_stateid(nfs4_stateid *dst, 3445 struct nfs4_state *state) 3446{ 3447 __be32 seqid_open; 3448 u32 dst_seqid; 3449 int seq; 3450 3451 for (;;) { 3452 if (!nfs4_valid_open_stateid(state)) 3453 break; 3454 seq = read_seqbegin(&state->seqlock); 3455 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3456 nfs4_stateid_copy(dst, &state->open_stateid); 3457 if (read_seqretry(&state->seqlock, seq)) 3458 continue; 3459 break; 3460 } 3461 seqid_open = state->open_stateid.seqid; 3462 if (read_seqretry(&state->seqlock, seq)) 3463 continue; 3464 3465 dst_seqid = be32_to_cpu(dst->seqid); 3466 if ((s32)(dst_seqid - be32_to_cpu(seqid_open)) < 0) 3467 dst->seqid = seqid_open; 3468 break; 3469 } 3470} 3471 3472/* 3473 * Update the seqid of an open stateid after receiving 3474 * NFS4ERR_OLD_STATEID 3475 */ 3476static bool nfs4_refresh_open_old_stateid(nfs4_stateid *dst, 3477 struct nfs4_state *state) 3478{ 3479 __be32 seqid_open; 3480 u32 dst_seqid; 3481 bool ret; 3482 int seq, status = -EAGAIN; 3483 DEFINE_WAIT(wait); 3484 3485 for (;;) { 3486 ret = false; 3487 if (!nfs4_valid_open_stateid(state)) 3488 break; 3489 seq = read_seqbegin(&state->seqlock); 3490 if (!nfs4_state_match_open_stateid_other(state, dst)) { 3491 if (read_seqretry(&state->seqlock, seq)) 3492 continue; 3493 break; 3494 } 3495 3496 write_seqlock(&state->seqlock); 3497 seqid_open = state->open_stateid.seqid; 3498 3499 dst_seqid = be32_to_cpu(dst->seqid); 3500 3501 /* Did another OPEN bump the state's seqid? try again: */ 3502 if ((s32)(be32_to_cpu(seqid_open) - dst_seqid) > 0) { 3503 dst->seqid = seqid_open; 3504 write_sequnlock(&state->seqlock); 3505 ret = true; 3506 break; 3507 } 3508 3509 /* server says we're behind but we haven't seen the update yet */ 3510 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags); 3511 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE); 3512 write_sequnlock(&state->seqlock); 3513 trace_nfs4_close_stateid_update_wait(state->inode, dst, 0); 3514 3515 if (fatal_signal_pending(current)) 3516 status = -EINTR; 3517 else 3518 if (schedule_timeout(5*HZ) != 0) 3519 status = 0; 3520 3521 finish_wait(&state->waitq, &wait); 3522 3523 if (!status) 3524 continue; 3525 if (status == -EINTR) 3526 break; 3527 3528 /* we slept the whole 5 seconds, we must have lost a seqid */ 3529 dst->seqid = cpu_to_be32(dst_seqid + 1); 3530 ret = true; 3531 break; 3532 } 3533 3534 return ret; 3535} 3536 3537struct nfs4_closedata { 3538 struct inode *inode; 3539 struct nfs4_state *state; 3540 struct nfs_closeargs arg; 3541 struct nfs_closeres res; 3542 struct { 3543 struct nfs4_layoutreturn_args arg; 3544 struct nfs4_layoutreturn_res res; 3545 struct nfs4_xdr_opaque_data ld_private; 3546 u32 roc_barrier; 3547 bool roc; 3548 } lr; 3549 struct nfs_fattr fattr; 3550 unsigned long timestamp; 3551}; 3552 3553static void nfs4_free_closedata(void *data) 3554{ 3555 struct nfs4_closedata *calldata = data; 3556 struct nfs4_state_owner *sp = calldata->state->owner; 3557 struct super_block *sb = calldata->state->inode->i_sb; 3558 3559 if (calldata->lr.roc) 3560 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 3561 calldata->res.lr_ret); 3562 nfs4_put_open_state(calldata->state); 3563 nfs_free_seqid(calldata->arg.seqid); 3564 nfs4_put_state_owner(sp); 3565 nfs_sb_deactive(sb); 3566 kfree(calldata); 3567} 3568 3569static void nfs4_close_done(struct rpc_task *task, void *data) 3570{ 3571 struct nfs4_closedata *calldata = data; 3572 struct nfs4_state *state = calldata->state; 3573 struct nfs_server *server = NFS_SERVER(calldata->inode); 3574 nfs4_stateid *res_stateid = NULL; 3575 struct nfs4_exception exception = { 3576 .state = state, 3577 .inode = calldata->inode, 3578 .stateid = &calldata->arg.stateid, 3579 }; 3580 3581 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3582 return; 3583 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3584 3585 /* Handle Layoutreturn errors */ 3586 if (pnfs_roc_done(task, &calldata->arg.lr_args, &calldata->res.lr_res, 3587 &calldata->res.lr_ret) == -EAGAIN) 3588 goto out_restart; 3589 3590 /* hmm. we are done with the inode, and in the process of freeing 3591 * the state_owner. we keep this around to process errors 3592 */ 3593 switch (task->tk_status) { 3594 case 0: 3595 res_stateid = &calldata->res.stateid; 3596 renew_lease(server, calldata->timestamp); 3597 break; 3598 case -NFS4ERR_ACCESS: 3599 if (calldata->arg.bitmask != NULL) { 3600 calldata->arg.bitmask = NULL; 3601 calldata->res.fattr = NULL; 3602 goto out_restart; 3603 3604 } 3605 break; 3606 case -NFS4ERR_OLD_STATEID: 3607 /* Did we race with OPEN? */ 3608 if (nfs4_refresh_open_old_stateid(&calldata->arg.stateid, 3609 state)) 3610 goto out_restart; 3611 goto out_release; 3612 case -NFS4ERR_ADMIN_REVOKED: 3613 case -NFS4ERR_STALE_STATEID: 3614 case -NFS4ERR_EXPIRED: 3615 nfs4_free_revoked_stateid(server, 3616 &calldata->arg.stateid, 3617 task->tk_msg.rpc_cred); 3618 fallthrough; 3619 case -NFS4ERR_BAD_STATEID: 3620 if (calldata->arg.fmode == 0) 3621 break; 3622 fallthrough; 3623 default: 3624 task->tk_status = nfs4_async_handle_exception(task, 3625 server, task->tk_status, &exception); 3626 if (exception.retry) 3627 goto out_restart; 3628 } 3629 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3630 res_stateid, calldata->arg.fmode); 3631out_release: 3632 task->tk_status = 0; 3633 nfs_release_seqid(calldata->arg.seqid); 3634 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3635 dprintk("%s: ret = %d\n", __func__, task->tk_status); 3636 return; 3637out_restart: 3638 task->tk_status = 0; 3639 rpc_restart_call_prepare(task); 3640 goto out_release; 3641} 3642 3643static void nfs4_close_prepare(struct rpc_task *task, void *data) 3644{ 3645 struct nfs4_closedata *calldata = data; 3646 struct nfs4_state *state = calldata->state; 3647 struct inode *inode = calldata->inode; 3648 struct nfs_server *server = NFS_SERVER(inode); 3649 struct pnfs_layout_hdr *lo; 3650 bool is_rdonly, is_wronly, is_rdwr; 3651 int call_close = 0; 3652 3653 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3654 goto out_wait; 3655 3656 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3657 spin_lock(&state->owner->so_lock); 3658 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3659 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3660 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3661 /* Calculate the change in open mode */ 3662 calldata->arg.fmode = 0; 3663 if (state->n_rdwr == 0) { 3664 if (state->n_rdonly == 0) 3665 call_close |= is_rdonly; 3666 else if (is_rdonly) 3667 calldata->arg.fmode |= FMODE_READ; 3668 if (state->n_wronly == 0) 3669 call_close |= is_wronly; 3670 else if (is_wronly) 3671 calldata->arg.fmode |= FMODE_WRITE; 3672 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3673 call_close |= is_rdwr; 3674 } else if (is_rdwr) 3675 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3676 3677 nfs4_sync_open_stateid(&calldata->arg.stateid, state); 3678 if (!nfs4_valid_open_stateid(state)) 3679 call_close = 0; 3680 spin_unlock(&state->owner->so_lock); 3681 3682 if (!call_close) { 3683 /* Note: exit _without_ calling nfs4_close_done */ 3684 goto out_no_action; 3685 } 3686 3687 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3688 nfs_release_seqid(calldata->arg.seqid); 3689 goto out_wait; 3690 } 3691 3692 lo = calldata->arg.lr_args ? calldata->arg.lr_args->layout : NULL; 3693 if (lo && !pnfs_layout_is_valid(lo)) { 3694 calldata->arg.lr_args = NULL; 3695 calldata->res.lr_res = NULL; 3696 } 3697 3698 if (calldata->arg.fmode == 0) 3699 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3700 3701 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3702 /* Close-to-open cache consistency revalidation */ 3703 if (!nfs4_have_delegation(inode, FMODE_READ)) { 3704 nfs4_bitmask_set(calldata->arg.bitmask_store, 3705 server->cache_consistency_bitmask, 3706 inode, 0); 3707 calldata->arg.bitmask = calldata->arg.bitmask_store; 3708 } else 3709 calldata->arg.bitmask = NULL; 3710 } 3711 3712 calldata->arg.share_access = 3713 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3714 calldata->arg.fmode, 0); 3715 3716 if (calldata->res.fattr == NULL) 3717 calldata->arg.bitmask = NULL; 3718 else if (calldata->arg.bitmask == NULL) 3719 calldata->res.fattr = NULL; 3720 calldata->timestamp = jiffies; 3721 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3722 &calldata->arg.seq_args, 3723 &calldata->res.seq_res, 3724 task) != 0) 3725 nfs_release_seqid(calldata->arg.seqid); 3726 return; 3727out_no_action: 3728 task->tk_action = NULL; 3729out_wait: 3730 nfs4_sequence_done(task, &calldata->res.seq_res); 3731} 3732 3733static const struct rpc_call_ops nfs4_close_ops = { 3734 .rpc_call_prepare = nfs4_close_prepare, 3735 .rpc_call_done = nfs4_close_done, 3736 .rpc_release = nfs4_free_closedata, 3737}; 3738 3739/* 3740 * It is possible for data to be read/written from a mem-mapped file 3741 * after the sys_close call (which hits the vfs layer as a flush). 3742 * This means that we can't safely call nfsv4 close on a file until 3743 * the inode is cleared. This in turn means that we are not good 3744 * NFSv4 citizens - we do not indicate to the server to update the file's 3745 * share state even when we are done with one of the three share 3746 * stateid's in the inode. 3747 * 3748 * NOTE: Caller must be holding the sp->so_owner semaphore! 3749 */ 3750int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3751{ 3752 struct nfs_server *server = NFS_SERVER(state->inode); 3753 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3754 struct nfs4_closedata *calldata; 3755 struct nfs4_state_owner *sp = state->owner; 3756 struct rpc_task *task; 3757 struct rpc_message msg = { 3758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3759 .rpc_cred = state->owner->so_cred, 3760 }; 3761 struct rpc_task_setup task_setup_data = { 3762 .rpc_client = server->client, 3763 .rpc_message = &msg, 3764 .callback_ops = &nfs4_close_ops, 3765 .workqueue = nfsiod_workqueue, 3766 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 3767 }; 3768 int status = -ENOMEM; 3769 3770 if (nfs_server_capable(state->inode, NFS_CAP_MOVEABLE)) 3771 task_setup_data.flags |= RPC_TASK_MOVEABLE; 3772 3773 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3774 &task_setup_data.rpc_client, &msg); 3775 3776 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3777 if (calldata == NULL) 3778 goto out; 3779 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1, 0); 3780 calldata->inode = state->inode; 3781 calldata->state = state; 3782 calldata->arg.fh = NFS_FH(state->inode); 3783 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state)) 3784 goto out_free_calldata; 3785 /* Serialization for the sequence id */ 3786 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3787 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3788 if (IS_ERR(calldata->arg.seqid)) 3789 goto out_free_calldata; 3790 nfs_fattr_init(&calldata->fattr); 3791 calldata->arg.fmode = 0; 3792 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3793 calldata->res.fattr = &calldata->fattr; 3794 calldata->res.seqid = calldata->arg.seqid; 3795 calldata->res.server = server; 3796 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3797 calldata->lr.roc = pnfs_roc(state->inode, 3798 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3799 if (calldata->lr.roc) { 3800 calldata->arg.lr_args = &calldata->lr.arg; 3801 calldata->res.lr_res = &calldata->lr.res; 3802 } 3803 nfs_sb_active(calldata->inode->i_sb); 3804 3805 msg.rpc_argp = &calldata->arg; 3806 msg.rpc_resp = &calldata->res; 3807 task_setup_data.callback_data = calldata; 3808 task = rpc_run_task(&task_setup_data); 3809 if (IS_ERR(task)) 3810 return PTR_ERR(task); 3811 status = 0; 3812 if (wait) 3813 status = rpc_wait_for_completion_task(task); 3814 rpc_put_task(task); 3815 return status; 3816out_free_calldata: 3817 kfree(calldata); 3818out: 3819 nfs4_put_open_state(state); 3820 nfs4_put_state_owner(sp); 3821 return status; 3822} 3823 3824static struct inode * 3825nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3826 int open_flags, struct iattr *attr, int *opened) 3827{ 3828 struct nfs4_state *state; 3829 struct nfs4_label l, *label; 3830 3831 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3832 3833 /* Protect against concurrent sillydeletes */ 3834 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3835 3836 nfs4_label_release_security(label); 3837 3838 if (IS_ERR(state)) 3839 return ERR_CAST(state); 3840 return state->inode; 3841} 3842 3843static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3844{ 3845 if (ctx->state == NULL) 3846 return; 3847 if (is_sync) 3848 nfs4_close_sync(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3849 else 3850 nfs4_close_state(ctx->state, _nfs4_ctx_to_openmode(ctx)); 3851} 3852 3853#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3854#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3855#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_XATTR_SUPPORT - 1UL) 3856 3857static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3858{ 3859 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3860 struct nfs4_server_caps_arg args = { 3861 .fhandle = fhandle, 3862 .bitmask = bitmask, 3863 }; 3864 struct nfs4_server_caps_res res = {}; 3865 struct rpc_message msg = { 3866 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3867 .rpc_argp = &args, 3868 .rpc_resp = &res, 3869 }; 3870 int status; 3871 int i; 3872 3873 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3874 FATTR4_WORD0_FH_EXPIRE_TYPE | 3875 FATTR4_WORD0_LINK_SUPPORT | 3876 FATTR4_WORD0_SYMLINK_SUPPORT | 3877 FATTR4_WORD0_ACLSUPPORT | 3878 FATTR4_WORD0_CASE_INSENSITIVE | 3879 FATTR4_WORD0_CASE_PRESERVING; 3880 if (minorversion) 3881 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3882 3883 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3884 if (status == 0) { 3885 /* Sanity check the server answers */ 3886 switch (minorversion) { 3887 case 0: 3888 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3889 res.attr_bitmask[2] = 0; 3890 break; 3891 case 1: 3892 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3893 break; 3894 case 2: 3895 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3896 } 3897 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3898 server->caps &= ~(NFS_CAP_ACLS | NFS_CAP_HARDLINKS | 3899 NFS_CAP_SYMLINKS| NFS_CAP_SECURITY_LABEL); 3900 server->fattr_valid = NFS_ATTR_FATTR_V4; 3901 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3902 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3903 server->caps |= NFS_CAP_ACLS; 3904 if (res.has_links != 0) 3905 server->caps |= NFS_CAP_HARDLINKS; 3906 if (res.has_symlinks != 0) 3907 server->caps |= NFS_CAP_SYMLINKS; 3908 if (res.case_insensitive) 3909 server->caps |= NFS_CAP_CASE_INSENSITIVE; 3910 if (res.case_preserving) 3911 server->caps |= NFS_CAP_CASE_PRESERVING; 3912#ifdef CONFIG_NFS_V4_SECURITY_LABEL 3913 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3914 server->caps |= NFS_CAP_SECURITY_LABEL; 3915#endif 3916 if (res.attr_bitmask[0] & FATTR4_WORD0_FS_LOCATIONS) 3917 server->caps |= NFS_CAP_FS_LOCATIONS; 3918 if (!(res.attr_bitmask[0] & FATTR4_WORD0_FILEID)) 3919 server->fattr_valid &= ~NFS_ATTR_FATTR_FILEID; 3920 if (!(res.attr_bitmask[1] & FATTR4_WORD1_MODE)) 3921 server->fattr_valid &= ~NFS_ATTR_FATTR_MODE; 3922 if (!(res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)) 3923 server->fattr_valid &= ~NFS_ATTR_FATTR_NLINK; 3924 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER)) 3925 server->fattr_valid &= ~(NFS_ATTR_FATTR_OWNER | 3926 NFS_ATTR_FATTR_OWNER_NAME); 3927 if (!(res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)) 3928 server->fattr_valid &= ~(NFS_ATTR_FATTR_GROUP | 3929 NFS_ATTR_FATTR_GROUP_NAME); 3930 if (!(res.attr_bitmask[1] & FATTR4_WORD1_SPACE_USED)) 3931 server->fattr_valid &= ~NFS_ATTR_FATTR_SPACE_USED; 3932 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)) 3933 server->fattr_valid &= ~NFS_ATTR_FATTR_ATIME; 3934 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)) 3935 server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME; 3936 if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)) 3937 server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME; 3938 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3939 sizeof(server->attr_bitmask)); 3940 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3941 3942 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3943 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3944 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3945 server->cache_consistency_bitmask[2] = 0; 3946 3947 /* Avoid a regression due to buggy server */ 3948 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3949 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3950 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3951 sizeof(server->exclcreat_bitmask)); 3952 3953 server->acl_bitmask = res.acl_bitmask; 3954 server->fh_expire_type = res.fh_expire_type; 3955 } 3956 3957 return status; 3958} 3959 3960int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3961{ 3962 struct nfs4_exception exception = { 3963 .interruptible = true, 3964 }; 3965 int err; 3966 3967 nfs4_server_set_init_caps(server); 3968 do { 3969 err = nfs4_handle_exception(server, 3970 _nfs4_server_capabilities(server, fhandle), 3971 &exception); 3972 } while (exception.retry); 3973 return err; 3974} 3975 3976static void test_fs_location_for_trunking(struct nfs4_fs_location *location, 3977 struct nfs_client *clp, 3978 struct nfs_server *server) 3979{ 3980 int i; 3981 3982 for (i = 0; i < location->nservers; i++) { 3983 struct nfs4_string *srv_loc = &location->servers[i]; 3984 struct sockaddr_storage addr; 3985 size_t addrlen; 3986 struct xprt_create xprt_args = { 3987 .ident = 0, 3988 .net = clp->cl_net, 3989 }; 3990 struct nfs4_add_xprt_data xprtdata = { 3991 .clp = clp, 3992 }; 3993 struct rpc_add_xprt_test rpcdata = { 3994 .add_xprt_test = clp->cl_mvops->session_trunk, 3995 .data = &xprtdata, 3996 }; 3997 char *servername = NULL; 3998 3999 if (!srv_loc->len) 4000 continue; 4001 4002 addrlen = nfs_parse_server_name(srv_loc->data, srv_loc->len, 4003 &addr, sizeof(addr), 4004 clp->cl_net, server->port); 4005 if (!addrlen) 4006 return; 4007 xprt_args.dstaddr = (struct sockaddr *)&addr; 4008 xprt_args.addrlen = addrlen; 4009 servername = kmalloc(srv_loc->len + 1, GFP_KERNEL); 4010 if (!servername) 4011 return; 4012 memcpy(servername, srv_loc->data, srv_loc->len); 4013 servername[srv_loc->len] = '\0'; 4014 xprt_args.servername = servername; 4015 4016 xprtdata.cred = nfs4_get_clid_cred(clp); 4017 rpc_clnt_add_xprt(clp->cl_rpcclient, &xprt_args, 4018 rpc_clnt_setup_test_and_add_xprt, 4019 &rpcdata); 4020 if (xprtdata.cred) 4021 put_cred(xprtdata.cred); 4022 kfree(servername); 4023 } 4024} 4025 4026static int _nfs4_discover_trunking(struct nfs_server *server, 4027 struct nfs_fh *fhandle) 4028{ 4029 struct nfs4_fs_locations *locations = NULL; 4030 struct page *page; 4031 const struct cred *cred; 4032 struct nfs_client *clp = server->nfs_client; 4033 const struct nfs4_state_maintenance_ops *ops = 4034 clp->cl_mvops->state_renewal_ops; 4035 int status = -ENOMEM, i; 4036 4037 cred = ops->get_state_renewal_cred(clp); 4038 if (cred == NULL) { 4039 cred = nfs4_get_clid_cred(clp); 4040 if (cred == NULL) 4041 return -ENOKEY; 4042 } 4043 4044 page = alloc_page(GFP_KERNEL); 4045 if (!page) 4046 goto out_put_cred; 4047 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4048 if (!locations) 4049 goto out_free; 4050 locations->fattr = nfs_alloc_fattr(); 4051 if (!locations->fattr) 4052 goto out_free_2; 4053 4054 status = nfs4_proc_get_locations(server, fhandle, locations, page, 4055 cred); 4056 if (status) 4057 goto out_free_3; 4058 4059 for (i = 0; i < locations->nlocations; i++) 4060 test_fs_location_for_trunking(&locations->locations[i], clp, 4061 server); 4062out_free_3: 4063 kfree(locations->fattr); 4064out_free_2: 4065 kfree(locations); 4066out_free: 4067 __free_page(page); 4068out_put_cred: 4069 put_cred(cred); 4070 return status; 4071} 4072 4073static int nfs4_discover_trunking(struct nfs_server *server, 4074 struct nfs_fh *fhandle) 4075{ 4076 struct nfs4_exception exception = { 4077 .interruptible = true, 4078 }; 4079 struct nfs_client *clp = server->nfs_client; 4080 int err = 0; 4081 4082 if (!nfs4_has_session(clp)) 4083 goto out; 4084 do { 4085 err = nfs4_handle_exception(server, 4086 _nfs4_discover_trunking(server, fhandle), 4087 &exception); 4088 } while (exception.retry); 4089out: 4090 return err; 4091} 4092 4093static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4094 struct nfs_fsinfo *info) 4095{ 4096 u32 bitmask[3]; 4097 struct nfs4_lookup_root_arg args = { 4098 .bitmask = bitmask, 4099 }; 4100 struct nfs4_lookup_res res = { 4101 .server = server, 4102 .fattr = info->fattr, 4103 .fh = fhandle, 4104 }; 4105 struct rpc_message msg = { 4106 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 4107 .rpc_argp = &args, 4108 .rpc_resp = &res, 4109 }; 4110 4111 bitmask[0] = nfs4_fattr_bitmap[0]; 4112 bitmask[1] = nfs4_fattr_bitmap[1]; 4113 /* 4114 * Process the label in the upcoming getfattr 4115 */ 4116 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 4117 4118 nfs_fattr_init(info->fattr); 4119 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4120} 4121 4122static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 4123 struct nfs_fsinfo *info) 4124{ 4125 struct nfs4_exception exception = { 4126 .interruptible = true, 4127 }; 4128 int err; 4129 do { 4130 err = _nfs4_lookup_root(server, fhandle, info); 4131 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 4132 switch (err) { 4133 case 0: 4134 case -NFS4ERR_WRONGSEC: 4135 goto out; 4136 default: 4137 err = nfs4_handle_exception(server, err, &exception); 4138 } 4139 } while (exception.retry); 4140out: 4141 return err; 4142} 4143 4144static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4145 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 4146{ 4147 struct rpc_auth_create_args auth_args = { 4148 .pseudoflavor = flavor, 4149 }; 4150 struct rpc_auth *auth; 4151 4152 auth = rpcauth_create(&auth_args, server->client); 4153 if (IS_ERR(auth)) 4154 return -EACCES; 4155 return nfs4_lookup_root(server, fhandle, info); 4156} 4157 4158/* 4159 * Retry pseudoroot lookup with various security flavors. We do this when: 4160 * 4161 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 4162 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 4163 * 4164 * Returns zero on success, or a negative NFS4ERR value, or a 4165 * negative errno value. 4166 */ 4167static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 4168 struct nfs_fsinfo *info) 4169{ 4170 /* Per 3530bis 15.33.5 */ 4171 static const rpc_authflavor_t flav_array[] = { 4172 RPC_AUTH_GSS_KRB5P, 4173 RPC_AUTH_GSS_KRB5I, 4174 RPC_AUTH_GSS_KRB5, 4175 RPC_AUTH_UNIX, /* courtesy */ 4176 RPC_AUTH_NULL, 4177 }; 4178 int status = -EPERM; 4179 size_t i; 4180 4181 if (server->auth_info.flavor_len > 0) { 4182 /* try each flavor specified by user */ 4183 for (i = 0; i < server->auth_info.flavor_len; i++) { 4184 status = nfs4_lookup_root_sec(server, fhandle, info, 4185 server->auth_info.flavors[i]); 4186 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4187 continue; 4188 break; 4189 } 4190 } else { 4191 /* no flavors specified by user, try default list */ 4192 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 4193 status = nfs4_lookup_root_sec(server, fhandle, info, 4194 flav_array[i]); 4195 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 4196 continue; 4197 break; 4198 } 4199 } 4200 4201 /* 4202 * -EACCES could mean that the user doesn't have correct permissions 4203 * to access the mount. It could also mean that we tried to mount 4204 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 4205 * existing mount programs don't handle -EACCES very well so it should 4206 * be mapped to -EPERM instead. 4207 */ 4208 if (status == -EACCES) 4209 status = -EPERM; 4210 return status; 4211} 4212 4213/** 4214 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 4215 * @server: initialized nfs_server handle 4216 * @fhandle: we fill in the pseudo-fs root file handle 4217 * @info: we fill in an FSINFO struct 4218 * @auth_probe: probe the auth flavours 4219 * 4220 * Returns zero on success, or a negative errno. 4221 */ 4222int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 4223 struct nfs_fsinfo *info, 4224 bool auth_probe) 4225{ 4226 int status = 0; 4227 4228 if (!auth_probe) 4229 status = nfs4_lookup_root(server, fhandle, info); 4230 4231 if (auth_probe || status == NFS4ERR_WRONGSEC) 4232 status = server->nfs_client->cl_mvops->find_root_sec(server, 4233 fhandle, info); 4234 4235 if (status == 0) 4236 status = nfs4_server_capabilities(server, fhandle); 4237 if (status == 0) 4238 status = nfs4_do_fsinfo(server, fhandle, info); 4239 4240 return nfs4_map_errors(status); 4241} 4242 4243static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 4244 struct nfs_fsinfo *info) 4245{ 4246 int error; 4247 struct nfs_fattr *fattr = info->fattr; 4248 4249 error = nfs4_server_capabilities(server, mntfh); 4250 if (error < 0) { 4251 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 4252 return error; 4253 } 4254 4255 error = nfs4_proc_getattr(server, mntfh, fattr, NULL); 4256 if (error < 0) { 4257 dprintk("nfs4_get_root: getattr error = %d\n", -error); 4258 goto out; 4259 } 4260 4261 if (fattr->valid & NFS_ATTR_FATTR_FSID && 4262 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 4263 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 4264 4265out: 4266 return error; 4267} 4268 4269/* 4270 * Get locations and (maybe) other attributes of a referral. 4271 * Note that we'll actually follow the referral later when 4272 * we detect fsid mismatch in inode revalidation 4273 */ 4274static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 4275 const struct qstr *name, struct nfs_fattr *fattr, 4276 struct nfs_fh *fhandle) 4277{ 4278 int status = -ENOMEM; 4279 struct page *page = NULL; 4280 struct nfs4_fs_locations *locations = NULL; 4281 4282 page = alloc_page(GFP_KERNEL); 4283 if (page == NULL) 4284 goto out; 4285 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 4286 if (locations == NULL) 4287 goto out; 4288 4289 locations->fattr = fattr; 4290 4291 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 4292 if (status != 0) 4293 goto out; 4294 4295 /* 4296 * If the fsid didn't change, this is a migration event, not a 4297 * referral. Cause us to drop into the exception handler, which 4298 * will kick off migration recovery. 4299 */ 4300 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &fattr->fsid)) { 4301 dprintk("%s: server did not return a different fsid for" 4302 " a referral at %s\n", __func__, name->name); 4303 status = -NFS4ERR_MOVED; 4304 goto out; 4305 } 4306 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 4307 nfs_fixup_referral_attributes(fattr); 4308 memset(fhandle, 0, sizeof(struct nfs_fh)); 4309out: 4310 if (page) 4311 __free_page(page); 4312 kfree(locations); 4313 return status; 4314} 4315 4316static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4317 struct nfs_fattr *fattr, struct inode *inode) 4318{ 4319 __u32 bitmask[NFS4_BITMASK_SZ]; 4320 struct nfs4_getattr_arg args = { 4321 .fh = fhandle, 4322 .bitmask = bitmask, 4323 }; 4324 struct nfs4_getattr_res res = { 4325 .fattr = fattr, 4326 .server = server, 4327 }; 4328 struct rpc_message msg = { 4329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4330 .rpc_argp = &args, 4331 .rpc_resp = &res, 4332 }; 4333 unsigned short task_flags = 0; 4334 4335 if (nfs4_has_session(server->nfs_client)) 4336 task_flags = RPC_TASK_MOVEABLE; 4337 4338 /* Is this is an attribute revalidation, subject to softreval? */ 4339 if (inode && (server->flags & NFS_MOUNT_SOFTREVAL)) 4340 task_flags |= RPC_TASK_TIMEOUT; 4341 4342 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, fattr->label), inode, 0); 4343 nfs_fattr_init(fattr); 4344 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4345 return nfs4_do_call_sync(server->client, server, &msg, 4346 &args.seq_args, &res.seq_res, task_flags); 4347} 4348 4349int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 4350 struct nfs_fattr *fattr, struct inode *inode) 4351{ 4352 struct nfs4_exception exception = { 4353 .interruptible = true, 4354 }; 4355 int err; 4356 do { 4357 err = _nfs4_proc_getattr(server, fhandle, fattr, inode); 4358 trace_nfs4_getattr(server, fhandle, fattr, err); 4359 err = nfs4_handle_exception(server, err, 4360 &exception); 4361 } while (exception.retry); 4362 return err; 4363} 4364 4365/* 4366 * The file is not closed if it is opened due to the a request to change 4367 * the size of the file. The open call will not be needed once the 4368 * VFS layer lookup-intents are implemented. 4369 * 4370 * Close is called when the inode is destroyed. 4371 * If we haven't opened the file for O_WRONLY, we 4372 * need to in the size_change case to obtain a stateid. 4373 * 4374 * Got race? 4375 * Because OPEN is always done by name in nfsv4, it is 4376 * possible that we opened a different file by the same 4377 * name. We can recognize this race condition, but we 4378 * can't do anything about it besides returning an error. 4379 * 4380 * This will be fixed with VFS changes (lookup-intent). 4381 */ 4382static int 4383nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 4384 struct iattr *sattr) 4385{ 4386 struct inode *inode = d_inode(dentry); 4387 const struct cred *cred = NULL; 4388 struct nfs_open_context *ctx = NULL; 4389 int status; 4390 4391 if (pnfs_ld_layoutret_on_setattr(inode) && 4392 sattr->ia_valid & ATTR_SIZE && 4393 sattr->ia_size < i_size_read(inode)) 4394 pnfs_commit_and_return_layout(inode); 4395 4396 nfs_fattr_init(fattr); 4397 4398 /* Deal with open(O_TRUNC) */ 4399 if (sattr->ia_valid & ATTR_OPEN) 4400 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 4401 4402 /* Optimization: if the end result is no change, don't RPC */ 4403 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 4404 return 0; 4405 4406 /* Search for an existing open(O_WRITE) file */ 4407 if (sattr->ia_valid & ATTR_FILE) { 4408 4409 ctx = nfs_file_open_context(sattr->ia_file); 4410 if (ctx) 4411 cred = ctx->cred; 4412 } 4413 4414 /* Return any delegations if we're going to change ACLs */ 4415 if ((sattr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) 4416 nfs4_inode_make_writeable(inode); 4417 4418 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL); 4419 if (status == 0) { 4420 nfs_setattr_update_inode(inode, sattr, fattr); 4421 nfs_setsecurity(inode, fattr); 4422 } 4423 return status; 4424} 4425 4426static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 4427 struct dentry *dentry, struct nfs_fh *fhandle, 4428 struct nfs_fattr *fattr) 4429{ 4430 struct nfs_server *server = NFS_SERVER(dir); 4431 int status; 4432 struct nfs4_lookup_arg args = { 4433 .bitmask = server->attr_bitmask, 4434 .dir_fh = NFS_FH(dir), 4435 .name = &dentry->d_name, 4436 }; 4437 struct nfs4_lookup_res res = { 4438 .server = server, 4439 .fattr = fattr, 4440 .fh = fhandle, 4441 }; 4442 struct rpc_message msg = { 4443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 4444 .rpc_argp = &args, 4445 .rpc_resp = &res, 4446 }; 4447 unsigned short task_flags = 0; 4448 4449 if (nfs_server_capable(dir, NFS_CAP_MOVEABLE)) 4450 task_flags = RPC_TASK_MOVEABLE; 4451 4452 /* Is this is an attribute revalidation, subject to softreval? */ 4453 if (nfs_lookup_is_soft_revalidate(dentry)) 4454 task_flags |= RPC_TASK_TIMEOUT; 4455 4456 args.bitmask = nfs4_bitmask(server, fattr->label); 4457 4458 nfs_fattr_init(fattr); 4459 4460 dprintk("NFS call lookup %pd2\n", dentry); 4461 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 4462 status = nfs4_do_call_sync(clnt, server, &msg, 4463 &args.seq_args, &res.seq_res, task_flags); 4464 dprintk("NFS reply lookup: %d\n", status); 4465 return status; 4466} 4467 4468static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 4469{ 4470 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 4471 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 4472 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 4473 fattr->nlink = 2; 4474} 4475 4476static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 4477 struct dentry *dentry, struct nfs_fh *fhandle, 4478 struct nfs_fattr *fattr) 4479{ 4480 struct nfs4_exception exception = { 4481 .interruptible = true, 4482 }; 4483 struct rpc_clnt *client = *clnt; 4484 const struct qstr *name = &dentry->d_name; 4485 int err; 4486 do { 4487 err = _nfs4_proc_lookup(client, dir, dentry, fhandle, fattr); 4488 trace_nfs4_lookup(dir, name, err); 4489 switch (err) { 4490 case -NFS4ERR_BADNAME: 4491 err = -ENOENT; 4492 goto out; 4493 case -NFS4ERR_MOVED: 4494 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 4495 if (err == -NFS4ERR_MOVED) 4496 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4497 goto out; 4498 case -NFS4ERR_WRONGSEC: 4499 err = -EPERM; 4500 if (client != *clnt) 4501 goto out; 4502 client = nfs4_negotiate_security(client, dir, name); 4503 if (IS_ERR(client)) 4504 return PTR_ERR(client); 4505 4506 exception.retry = 1; 4507 break; 4508 default: 4509 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 4510 } 4511 } while (exception.retry); 4512 4513out: 4514 if (err == 0) 4515 *clnt = client; 4516 else if (client != *clnt) 4517 rpc_shutdown_client(client); 4518 4519 return err; 4520} 4521 4522static int nfs4_proc_lookup(struct inode *dir, struct dentry *dentry, 4523 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4524{ 4525 int status; 4526 struct rpc_clnt *client = NFS_CLIENT(dir); 4527 4528 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4529 if (client != NFS_CLIENT(dir)) { 4530 rpc_shutdown_client(client); 4531 nfs_fixup_secinfo_attributes(fattr); 4532 } 4533 return status; 4534} 4535 4536struct rpc_clnt * 4537nfs4_proc_lookup_mountpoint(struct inode *dir, struct dentry *dentry, 4538 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4539{ 4540 struct rpc_clnt *client = NFS_CLIENT(dir); 4541 int status; 4542 4543 status = nfs4_proc_lookup_common(&client, dir, dentry, fhandle, fattr); 4544 if (status < 0) 4545 return ERR_PTR(status); 4546 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 4547} 4548 4549static int _nfs4_proc_lookupp(struct inode *inode, 4550 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 4551{ 4552 struct rpc_clnt *clnt = NFS_CLIENT(inode); 4553 struct nfs_server *server = NFS_SERVER(inode); 4554 int status; 4555 struct nfs4_lookupp_arg args = { 4556 .bitmask = server->attr_bitmask, 4557 .fh = NFS_FH(inode), 4558 }; 4559 struct nfs4_lookupp_res res = { 4560 .server = server, 4561 .fattr = fattr, 4562 .fh = fhandle, 4563 }; 4564 struct rpc_message msg = { 4565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 4566 .rpc_argp = &args, 4567 .rpc_resp = &res, 4568 }; 4569 unsigned short task_flags = 0; 4570 4571 if (NFS_SERVER(inode)->flags & NFS_MOUNT_SOFTREVAL) 4572 task_flags |= RPC_TASK_TIMEOUT; 4573 4574 args.bitmask = nfs4_bitmask(server, fattr->label); 4575 4576 nfs_fattr_init(fattr); 4577 4578 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 4579 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 4580 &res.seq_res, task_flags); 4581 dprintk("NFS reply lookupp: %d\n", status); 4582 return status; 4583} 4584 4585static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 4586 struct nfs_fattr *fattr) 4587{ 4588 struct nfs4_exception exception = { 4589 .interruptible = true, 4590 }; 4591 int err; 4592 do { 4593 err = _nfs4_proc_lookupp(inode, fhandle, fattr); 4594 trace_nfs4_lookupp(inode, err); 4595 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4596 &exception); 4597 } while (exception.retry); 4598 return err; 4599} 4600 4601static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4602 const struct cred *cred) 4603{ 4604 struct nfs_server *server = NFS_SERVER(inode); 4605 struct nfs4_accessargs args = { 4606 .fh = NFS_FH(inode), 4607 .access = entry->mask, 4608 }; 4609 struct nfs4_accessres res = { 4610 .server = server, 4611 }; 4612 struct rpc_message msg = { 4613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 4614 .rpc_argp = &args, 4615 .rpc_resp = &res, 4616 .rpc_cred = cred, 4617 }; 4618 int status = 0; 4619 4620 if (!nfs4_have_delegation(inode, FMODE_READ)) { 4621 res.fattr = nfs_alloc_fattr(); 4622 if (res.fattr == NULL) 4623 return -ENOMEM; 4624 args.bitmask = server->cache_consistency_bitmask; 4625 } 4626 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4627 if (!status) { 4628 nfs_access_set_mask(entry, res.access); 4629 if (res.fattr) 4630 nfs_refresh_inode(inode, res.fattr); 4631 } 4632 nfs_free_fattr(res.fattr); 4633 return status; 4634} 4635 4636static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry, 4637 const struct cred *cred) 4638{ 4639 struct nfs4_exception exception = { 4640 .interruptible = true, 4641 }; 4642 int err; 4643 do { 4644 err = _nfs4_proc_access(inode, entry, cred); 4645 trace_nfs4_access(inode, err); 4646 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4647 &exception); 4648 } while (exception.retry); 4649 return err; 4650} 4651 4652/* 4653 * TODO: For the time being, we don't try to get any attributes 4654 * along with any of the zero-copy operations READ, READDIR, 4655 * READLINK, WRITE. 4656 * 4657 * In the case of the first three, we want to put the GETATTR 4658 * after the read-type operation -- this is because it is hard 4659 * to predict the length of a GETATTR response in v4, and thus 4660 * align the READ data correctly. This means that the GETATTR 4661 * may end up partially falling into the page cache, and we should 4662 * shift it into the 'tail' of the xdr_buf before processing. 4663 * To do this efficiently, we need to know the total length 4664 * of data received, which doesn't seem to be available outside 4665 * of the RPC layer. 4666 * 4667 * In the case of WRITE, we also want to put the GETATTR after 4668 * the operation -- in this case because we want to make sure 4669 * we get the post-operation mtime and size. 4670 * 4671 * Both of these changes to the XDR layer would in fact be quite 4672 * minor, but I decided to leave them for a subsequent patch. 4673 */ 4674static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 4675 unsigned int pgbase, unsigned int pglen) 4676{ 4677 struct nfs4_readlink args = { 4678 .fh = NFS_FH(inode), 4679 .pgbase = pgbase, 4680 .pglen = pglen, 4681 .pages = &page, 4682 }; 4683 struct nfs4_readlink_res res; 4684 struct rpc_message msg = { 4685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 4686 .rpc_argp = &args, 4687 .rpc_resp = &res, 4688 }; 4689 4690 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 4691} 4692 4693static int nfs4_proc_readlink(struct inode *inode, struct page *page, 4694 unsigned int pgbase, unsigned int pglen) 4695{ 4696 struct nfs4_exception exception = { 4697 .interruptible = true, 4698 }; 4699 int err; 4700 do { 4701 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 4702 trace_nfs4_readlink(inode, err); 4703 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4704 &exception); 4705 } while (exception.retry); 4706 return err; 4707} 4708 4709/* 4710 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 4711 */ 4712static int 4713nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 4714 int flags) 4715{ 4716 struct nfs_server *server = NFS_SERVER(dir); 4717 struct nfs4_label l, *ilabel; 4718 struct nfs_open_context *ctx; 4719 struct nfs4_state *state; 4720 int status = 0; 4721 4722 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 4723 if (IS_ERR(ctx)) 4724 return PTR_ERR(ctx); 4725 4726 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 4727 4728 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4729 sattr->ia_mode &= ~current_umask(); 4730 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4731 if (IS_ERR(state)) { 4732 status = PTR_ERR(state); 4733 goto out; 4734 } 4735out: 4736 nfs4_label_release_security(ilabel); 4737 put_nfs_open_context(ctx); 4738 return status; 4739} 4740 4741static int 4742_nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype) 4743{ 4744 struct nfs_server *server = NFS_SERVER(dir); 4745 struct nfs_removeargs args = { 4746 .fh = NFS_FH(dir), 4747 .name = *name, 4748 }; 4749 struct nfs_removeres res = { 4750 .server = server, 4751 }; 4752 struct rpc_message msg = { 4753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4754 .rpc_argp = &args, 4755 .rpc_resp = &res, 4756 }; 4757 unsigned long timestamp = jiffies; 4758 int status; 4759 4760 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4761 if (status == 0) { 4762 spin_lock(&dir->i_lock); 4763 /* Removing a directory decrements nlink in the parent */ 4764 if (ftype == NF4DIR && dir->i_nlink > 2) 4765 nfs4_dec_nlink_locked(dir); 4766 nfs4_update_changeattr_locked(dir, &res.cinfo, timestamp, 4767 NFS_INO_INVALID_DATA); 4768 spin_unlock(&dir->i_lock); 4769 } 4770 return status; 4771} 4772 4773static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry) 4774{ 4775 struct nfs4_exception exception = { 4776 .interruptible = true, 4777 }; 4778 struct inode *inode = d_inode(dentry); 4779 int err; 4780 4781 if (inode) { 4782 if (inode->i_nlink == 1) 4783 nfs4_inode_return_delegation(inode); 4784 else 4785 nfs4_inode_make_writeable(inode); 4786 } 4787 do { 4788 err = _nfs4_proc_remove(dir, &dentry->d_name, NF4REG); 4789 trace_nfs4_remove(dir, &dentry->d_name, err); 4790 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4791 &exception); 4792 } while (exception.retry); 4793 return err; 4794} 4795 4796static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name) 4797{ 4798 struct nfs4_exception exception = { 4799 .interruptible = true, 4800 }; 4801 int err; 4802 4803 do { 4804 err = _nfs4_proc_remove(dir, name, NF4DIR); 4805 trace_nfs4_remove(dir, name, err); 4806 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4807 &exception); 4808 } while (exception.retry); 4809 return err; 4810} 4811 4812static void nfs4_proc_unlink_setup(struct rpc_message *msg, 4813 struct dentry *dentry, 4814 struct inode *inode) 4815{ 4816 struct nfs_removeargs *args = msg->rpc_argp; 4817 struct nfs_removeres *res = msg->rpc_resp; 4818 4819 res->server = NFS_SB(dentry->d_sb); 4820 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4821 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1, 0); 4822 4823 nfs_fattr_init(res->dir_attr); 4824 4825 if (inode) { 4826 nfs4_inode_return_delegation(inode); 4827 nfs_d_prune_case_insensitive_aliases(inode); 4828 } 4829} 4830 4831static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4832{ 4833 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4834 &data->args.seq_args, 4835 &data->res.seq_res, 4836 task); 4837} 4838 4839static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4840{ 4841 struct nfs_unlinkdata *data = task->tk_calldata; 4842 struct nfs_removeres *res = &data->res; 4843 4844 if (!nfs4_sequence_done(task, &res->seq_res)) 4845 return 0; 4846 if (nfs4_async_handle_error(task, res->server, NULL, 4847 &data->timeout) == -EAGAIN) 4848 return 0; 4849 if (task->tk_status == 0) 4850 nfs4_update_changeattr(dir, &res->cinfo, 4851 res->dir_attr->time_start, 4852 NFS_INO_INVALID_DATA); 4853 return 1; 4854} 4855 4856static void nfs4_proc_rename_setup(struct rpc_message *msg, 4857 struct dentry *old_dentry, 4858 struct dentry *new_dentry) 4859{ 4860 struct nfs_renameargs *arg = msg->rpc_argp; 4861 struct nfs_renameres *res = msg->rpc_resp; 4862 struct inode *old_inode = d_inode(old_dentry); 4863 struct inode *new_inode = d_inode(new_dentry); 4864 4865 if (old_inode) 4866 nfs4_inode_make_writeable(old_inode); 4867 if (new_inode) 4868 nfs4_inode_return_delegation(new_inode); 4869 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4870 res->server = NFS_SB(old_dentry->d_sb); 4871 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1, 0); 4872} 4873 4874static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4875{ 4876 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4877 &data->args.seq_args, 4878 &data->res.seq_res, 4879 task); 4880} 4881 4882static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4883 struct inode *new_dir) 4884{ 4885 struct nfs_renamedata *data = task->tk_calldata; 4886 struct nfs_renameres *res = &data->res; 4887 4888 if (!nfs4_sequence_done(task, &res->seq_res)) 4889 return 0; 4890 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4891 return 0; 4892 4893 if (task->tk_status == 0) { 4894 nfs_d_prune_case_insensitive_aliases(d_inode(data->old_dentry)); 4895 if (new_dir != old_dir) { 4896 /* Note: If we moved a directory, nlink will change */ 4897 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4898 res->old_fattr->time_start, 4899 NFS_INO_INVALID_NLINK | 4900 NFS_INO_INVALID_DATA); 4901 nfs4_update_changeattr(new_dir, &res->new_cinfo, 4902 res->new_fattr->time_start, 4903 NFS_INO_INVALID_NLINK | 4904 NFS_INO_INVALID_DATA); 4905 } else 4906 nfs4_update_changeattr(old_dir, &res->old_cinfo, 4907 res->old_fattr->time_start, 4908 NFS_INO_INVALID_DATA); 4909 } 4910 return 1; 4911} 4912 4913static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4914{ 4915 struct nfs_server *server = NFS_SERVER(inode); 4916 __u32 bitmask[NFS4_BITMASK_SZ]; 4917 struct nfs4_link_arg arg = { 4918 .fh = NFS_FH(inode), 4919 .dir_fh = NFS_FH(dir), 4920 .name = name, 4921 .bitmask = bitmask, 4922 }; 4923 struct nfs4_link_res res = { 4924 .server = server, 4925 }; 4926 struct rpc_message msg = { 4927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4928 .rpc_argp = &arg, 4929 .rpc_resp = &res, 4930 }; 4931 int status = -ENOMEM; 4932 4933 res.fattr = nfs_alloc_fattr_with_label(server); 4934 if (res.fattr == NULL) 4935 goto out; 4936 4937 nfs4_inode_make_writeable(inode); 4938 nfs4_bitmap_copy_adjust(bitmask, nfs4_bitmask(server, res.fattr->label), inode, 4939 NFS_INO_INVALID_CHANGE); 4940 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4941 if (!status) { 4942 nfs4_update_changeattr(dir, &res.cinfo, res.fattr->time_start, 4943 NFS_INO_INVALID_DATA); 4944 nfs4_inc_nlink(inode); 4945 status = nfs_post_op_update_inode(inode, res.fattr); 4946 if (!status) 4947 nfs_setsecurity(inode, res.fattr); 4948 } 4949 4950out: 4951 nfs_free_fattr(res.fattr); 4952 return status; 4953} 4954 4955static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4956{ 4957 struct nfs4_exception exception = { 4958 .interruptible = true, 4959 }; 4960 int err; 4961 do { 4962 err = nfs4_handle_exception(NFS_SERVER(inode), 4963 _nfs4_proc_link(inode, dir, name), 4964 &exception); 4965 } while (exception.retry); 4966 return err; 4967} 4968 4969struct nfs4_createdata { 4970 struct rpc_message msg; 4971 struct nfs4_create_arg arg; 4972 struct nfs4_create_res res; 4973 struct nfs_fh fh; 4974 struct nfs_fattr fattr; 4975}; 4976 4977static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4978 const struct qstr *name, struct iattr *sattr, u32 ftype) 4979{ 4980 struct nfs4_createdata *data; 4981 4982 data = kzalloc(sizeof(*data), GFP_KERNEL); 4983 if (data != NULL) { 4984 struct nfs_server *server = NFS_SERVER(dir); 4985 4986 data->fattr.label = nfs4_label_alloc(server, GFP_KERNEL); 4987 if (IS_ERR(data->fattr.label)) 4988 goto out_free; 4989 4990 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4991 data->msg.rpc_argp = &data->arg; 4992 data->msg.rpc_resp = &data->res; 4993 data->arg.dir_fh = NFS_FH(dir); 4994 data->arg.server = server; 4995 data->arg.name = name; 4996 data->arg.attrs = sattr; 4997 data->arg.ftype = ftype; 4998 data->arg.bitmask = nfs4_bitmask(server, data->fattr.label); 4999 data->arg.umask = current_umask(); 5000 data->res.server = server; 5001 data->res.fh = &data->fh; 5002 data->res.fattr = &data->fattr; 5003 nfs_fattr_init(data->res.fattr); 5004 } 5005 return data; 5006out_free: 5007 kfree(data); 5008 return NULL; 5009} 5010 5011static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 5012{ 5013 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 5014 &data->arg.seq_args, &data->res.seq_res, 1); 5015 if (status == 0) { 5016 spin_lock(&dir->i_lock); 5017 /* Creating a directory bumps nlink in the parent */ 5018 if (data->arg.ftype == NF4DIR) 5019 nfs4_inc_nlink_locked(dir); 5020 nfs4_update_changeattr_locked(dir, &data->res.dir_cinfo, 5021 data->res.fattr->time_start, 5022 NFS_INO_INVALID_DATA); 5023 spin_unlock(&dir->i_lock); 5024 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr); 5025 } 5026 return status; 5027} 5028 5029static void nfs4_free_createdata(struct nfs4_createdata *data) 5030{ 5031 nfs4_label_free(data->fattr.label); 5032 kfree(data); 5033} 5034 5035static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 5036 struct folio *folio, unsigned int len, struct iattr *sattr, 5037 struct nfs4_label *label) 5038{ 5039 struct page *page = &folio->page; 5040 struct nfs4_createdata *data; 5041 int status = -ENAMETOOLONG; 5042 5043 if (len > NFS4_MAXPATHLEN) 5044 goto out; 5045 5046 status = -ENOMEM; 5047 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 5048 if (data == NULL) 5049 goto out; 5050 5051 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 5052 data->arg.u.symlink.pages = &page; 5053 data->arg.u.symlink.len = len; 5054 data->arg.label = label; 5055 5056 status = nfs4_do_create(dir, dentry, data); 5057 5058 nfs4_free_createdata(data); 5059out: 5060 return status; 5061} 5062 5063static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 5064 struct folio *folio, unsigned int len, struct iattr *sattr) 5065{ 5066 struct nfs4_exception exception = { 5067 .interruptible = true, 5068 }; 5069 struct nfs4_label l, *label; 5070 int err; 5071 5072 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5073 5074 do { 5075 err = _nfs4_proc_symlink(dir, dentry, folio, len, sattr, label); 5076 trace_nfs4_symlink(dir, &dentry->d_name, err); 5077 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5078 &exception); 5079 } while (exception.retry); 5080 5081 nfs4_label_release_security(label); 5082 return err; 5083} 5084 5085static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5086 struct iattr *sattr, struct nfs4_label *label) 5087{ 5088 struct nfs4_createdata *data; 5089 int status = -ENOMEM; 5090 5091 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 5092 if (data == NULL) 5093 goto out; 5094 5095 data->arg.label = label; 5096 status = nfs4_do_create(dir, dentry, data); 5097 5098 nfs4_free_createdata(data); 5099out: 5100 return status; 5101} 5102 5103static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 5104 struct iattr *sattr) 5105{ 5106 struct nfs_server *server = NFS_SERVER(dir); 5107 struct nfs4_exception exception = { 5108 .interruptible = true, 5109 }; 5110 struct nfs4_label l, *label; 5111 int err; 5112 5113 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5114 5115 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5116 sattr->ia_mode &= ~current_umask(); 5117 do { 5118 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 5119 trace_nfs4_mkdir(dir, &dentry->d_name, err); 5120 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5121 &exception); 5122 } while (exception.retry); 5123 nfs4_label_release_security(label); 5124 5125 return err; 5126} 5127 5128static int _nfs4_proc_readdir(struct nfs_readdir_arg *nr_arg, 5129 struct nfs_readdir_res *nr_res) 5130{ 5131 struct inode *dir = d_inode(nr_arg->dentry); 5132 struct nfs_server *server = NFS_SERVER(dir); 5133 struct nfs4_readdir_arg args = { 5134 .fh = NFS_FH(dir), 5135 .pages = nr_arg->pages, 5136 .pgbase = 0, 5137 .count = nr_arg->page_len, 5138 .plus = nr_arg->plus, 5139 }; 5140 struct nfs4_readdir_res res; 5141 struct rpc_message msg = { 5142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 5143 .rpc_argp = &args, 5144 .rpc_resp = &res, 5145 .rpc_cred = nr_arg->cred, 5146 }; 5147 int status; 5148 5149 dprintk("%s: dentry = %pd2, cookie = %llu\n", __func__, 5150 nr_arg->dentry, (unsigned long long)nr_arg->cookie); 5151 if (!(server->caps & NFS_CAP_SECURITY_LABEL)) 5152 args.bitmask = server->attr_bitmask_nl; 5153 else 5154 args.bitmask = server->attr_bitmask; 5155 5156 nfs4_setup_readdir(nr_arg->cookie, nr_arg->verf, nr_arg->dentry, &args); 5157 res.pgbase = args.pgbase; 5158 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 5159 &res.seq_res, 0); 5160 if (status >= 0) { 5161 memcpy(nr_res->verf, res.verifier.data, NFS4_VERIFIER_SIZE); 5162 status += args.pgbase; 5163 } 5164 5165 nfs_invalidate_atime(dir); 5166 5167 dprintk("%s: returns %d\n", __func__, status); 5168 return status; 5169} 5170 5171static int nfs4_proc_readdir(struct nfs_readdir_arg *arg, 5172 struct nfs_readdir_res *res) 5173{ 5174 struct nfs4_exception exception = { 5175 .interruptible = true, 5176 }; 5177 int err; 5178 do { 5179 err = _nfs4_proc_readdir(arg, res); 5180 trace_nfs4_readdir(d_inode(arg->dentry), err); 5181 err = nfs4_handle_exception(NFS_SERVER(d_inode(arg->dentry)), 5182 err, &exception); 5183 } while (exception.retry); 5184 return err; 5185} 5186 5187static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5188 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 5189{ 5190 struct nfs4_createdata *data; 5191 int mode = sattr->ia_mode; 5192 int status = -ENOMEM; 5193 5194 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 5195 if (data == NULL) 5196 goto out; 5197 5198 if (S_ISFIFO(mode)) 5199 data->arg.ftype = NF4FIFO; 5200 else if (S_ISBLK(mode)) { 5201 data->arg.ftype = NF4BLK; 5202 data->arg.u.device.specdata1 = MAJOR(rdev); 5203 data->arg.u.device.specdata2 = MINOR(rdev); 5204 } 5205 else if (S_ISCHR(mode)) { 5206 data->arg.ftype = NF4CHR; 5207 data->arg.u.device.specdata1 = MAJOR(rdev); 5208 data->arg.u.device.specdata2 = MINOR(rdev); 5209 } else if (!S_ISSOCK(mode)) { 5210 status = -EINVAL; 5211 goto out_free; 5212 } 5213 5214 data->arg.label = label; 5215 status = nfs4_do_create(dir, dentry, data); 5216out_free: 5217 nfs4_free_createdata(data); 5218out: 5219 return status; 5220} 5221 5222static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 5223 struct iattr *sattr, dev_t rdev) 5224{ 5225 struct nfs_server *server = NFS_SERVER(dir); 5226 struct nfs4_exception exception = { 5227 .interruptible = true, 5228 }; 5229 struct nfs4_label l, *label; 5230 int err; 5231 5232 label = nfs4_label_init_security(dir, dentry, sattr, &l); 5233 5234 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 5235 sattr->ia_mode &= ~current_umask(); 5236 do { 5237 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 5238 trace_nfs4_mknod(dir, &dentry->d_name, err); 5239 err = nfs4_handle_exception(NFS_SERVER(dir), err, 5240 &exception); 5241 } while (exception.retry); 5242 5243 nfs4_label_release_security(label); 5244 5245 return err; 5246} 5247 5248static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 5249 struct nfs_fsstat *fsstat) 5250{ 5251 struct nfs4_statfs_arg args = { 5252 .fh = fhandle, 5253 .bitmask = server->attr_bitmask, 5254 }; 5255 struct nfs4_statfs_res res = { 5256 .fsstat = fsstat, 5257 }; 5258 struct rpc_message msg = { 5259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 5260 .rpc_argp = &args, 5261 .rpc_resp = &res, 5262 }; 5263 5264 nfs_fattr_init(fsstat->fattr); 5265 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5266} 5267 5268static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 5269{ 5270 struct nfs4_exception exception = { 5271 .interruptible = true, 5272 }; 5273 int err; 5274 do { 5275 err = nfs4_handle_exception(server, 5276 _nfs4_proc_statfs(server, fhandle, fsstat), 5277 &exception); 5278 } while (exception.retry); 5279 return err; 5280} 5281 5282static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 5283 struct nfs_fsinfo *fsinfo) 5284{ 5285 struct nfs4_fsinfo_arg args = { 5286 .fh = fhandle, 5287 .bitmask = server->attr_bitmask, 5288 }; 5289 struct nfs4_fsinfo_res res = { 5290 .fsinfo = fsinfo, 5291 }; 5292 struct rpc_message msg = { 5293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 5294 .rpc_argp = &args, 5295 .rpc_resp = &res, 5296 }; 5297 5298 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5299} 5300 5301static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5302{ 5303 struct nfs4_exception exception = { 5304 .interruptible = true, 5305 }; 5306 int err; 5307 5308 do { 5309 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 5310 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 5311 if (err == 0) { 5312 nfs4_set_lease_period(server->nfs_client, fsinfo->lease_time * HZ); 5313 break; 5314 } 5315 err = nfs4_handle_exception(server, err, &exception); 5316 } while (exception.retry); 5317 return err; 5318} 5319 5320static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 5321{ 5322 int error; 5323 5324 nfs_fattr_init(fsinfo->fattr); 5325 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 5326 if (error == 0) { 5327 /* block layout checks this! */ 5328 server->pnfs_blksize = fsinfo->blksize; 5329 set_pnfs_layoutdriver(server, fhandle, fsinfo); 5330 } 5331 5332 return error; 5333} 5334 5335static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5336 struct nfs_pathconf *pathconf) 5337{ 5338 struct nfs4_pathconf_arg args = { 5339 .fh = fhandle, 5340 .bitmask = server->attr_bitmask, 5341 }; 5342 struct nfs4_pathconf_res res = { 5343 .pathconf = pathconf, 5344 }; 5345 struct rpc_message msg = { 5346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 5347 .rpc_argp = &args, 5348 .rpc_resp = &res, 5349 }; 5350 5351 /* None of the pathconf attributes are mandatory to implement */ 5352 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 5353 memset(pathconf, 0, sizeof(*pathconf)); 5354 return 0; 5355 } 5356 5357 nfs_fattr_init(pathconf->fattr); 5358 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 5359} 5360 5361static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 5362 struct nfs_pathconf *pathconf) 5363{ 5364 struct nfs4_exception exception = { 5365 .interruptible = true, 5366 }; 5367 int err; 5368 5369 do { 5370 err = nfs4_handle_exception(server, 5371 _nfs4_proc_pathconf(server, fhandle, pathconf), 5372 &exception); 5373 } while (exception.retry); 5374 return err; 5375} 5376 5377int nfs4_set_rw_stateid(nfs4_stateid *stateid, 5378 const struct nfs_open_context *ctx, 5379 const struct nfs_lock_context *l_ctx, 5380 fmode_t fmode) 5381{ 5382 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 5383} 5384EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 5385 5386static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 5387 const struct nfs_open_context *ctx, 5388 const struct nfs_lock_context *l_ctx, 5389 fmode_t fmode) 5390{ 5391 nfs4_stateid _current_stateid; 5392 5393 /* If the current stateid represents a lost lock, then exit */ 5394 if (nfs4_set_rw_stateid(&_current_stateid, ctx, l_ctx, fmode) == -EIO) 5395 return true; 5396 return nfs4_stateid_match(stateid, &_current_stateid); 5397} 5398 5399static bool nfs4_error_stateid_expired(int err) 5400{ 5401 switch (err) { 5402 case -NFS4ERR_DELEG_REVOKED: 5403 case -NFS4ERR_ADMIN_REVOKED: 5404 case -NFS4ERR_BAD_STATEID: 5405 case -NFS4ERR_STALE_STATEID: 5406 case -NFS4ERR_OLD_STATEID: 5407 case -NFS4ERR_OPENMODE: 5408 case -NFS4ERR_EXPIRED: 5409 return true; 5410 } 5411 return false; 5412} 5413 5414static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 5415{ 5416 struct nfs_server *server = NFS_SERVER(hdr->inode); 5417 5418 trace_nfs4_read(hdr, task->tk_status); 5419 if (task->tk_status < 0) { 5420 struct nfs4_exception exception = { 5421 .inode = hdr->inode, 5422 .state = hdr->args.context->state, 5423 .stateid = &hdr->args.stateid, 5424 }; 5425 task->tk_status = nfs4_async_handle_exception(task, 5426 server, task->tk_status, &exception); 5427 if (exception.retry) { 5428 rpc_restart_call_prepare(task); 5429 return -EAGAIN; 5430 } 5431 } 5432 5433 if (task->tk_status > 0) 5434 renew_lease(server, hdr->timestamp); 5435 return 0; 5436} 5437 5438static bool nfs4_read_stateid_changed(struct rpc_task *task, 5439 struct nfs_pgio_args *args) 5440{ 5441 5442 if (!nfs4_error_stateid_expired(task->tk_status) || 5443 nfs4_stateid_is_current(&args->stateid, 5444 args->context, 5445 args->lock_context, 5446 FMODE_READ)) 5447 return false; 5448 rpc_restart_call_prepare(task); 5449 return true; 5450} 5451 5452static bool nfs4_read_plus_not_supported(struct rpc_task *task, 5453 struct nfs_pgio_header *hdr) 5454{ 5455 struct nfs_server *server = NFS_SERVER(hdr->inode); 5456 struct rpc_message *msg = &task->tk_msg; 5457 5458 if (msg->rpc_proc == &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS] && 5459 server->caps & NFS_CAP_READ_PLUS && task->tk_status == -ENOTSUPP) { 5460 server->caps &= ~NFS_CAP_READ_PLUS; 5461 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5462 rpc_restart_call_prepare(task); 5463 return true; 5464 } 5465 return false; 5466} 5467 5468static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5469{ 5470 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5471 return -EAGAIN; 5472 if (nfs4_read_stateid_changed(task, &hdr->args)) 5473 return -EAGAIN; 5474 if (nfs4_read_plus_not_supported(task, hdr)) 5475 return -EAGAIN; 5476 if (task->tk_status > 0) 5477 nfs_invalidate_atime(hdr->inode); 5478 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5479 nfs4_read_done_cb(task, hdr); 5480} 5481 5482#if defined CONFIG_NFS_V4_2 && defined CONFIG_NFS_V4_2_READ_PLUS 5483static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5484 struct rpc_message *msg) 5485{ 5486 /* Note: We don't use READ_PLUS with pNFS yet */ 5487 if (nfs_server_capable(hdr->inode, NFS_CAP_READ_PLUS) && !hdr->ds_clp) { 5488 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ_PLUS]; 5489 return nfs_read_alloc_scratch(hdr, READ_PLUS_SCRATCH_SIZE); 5490 } 5491 return false; 5492} 5493#else 5494static bool nfs42_read_plus_support(struct nfs_pgio_header *hdr, 5495 struct rpc_message *msg) 5496{ 5497 return false; 5498} 5499#endif /* CONFIG_NFS_V4_2 */ 5500 5501static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 5502 struct rpc_message *msg) 5503{ 5504 hdr->timestamp = jiffies; 5505 if (!hdr->pgio_done_cb) 5506 hdr->pgio_done_cb = nfs4_read_done_cb; 5507 if (!nfs42_read_plus_support(hdr, msg)) 5508 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 5509 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5510} 5511 5512static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 5513 struct nfs_pgio_header *hdr) 5514{ 5515 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 5516 &hdr->args.seq_args, 5517 &hdr->res.seq_res, 5518 task)) 5519 return 0; 5520 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 5521 hdr->args.lock_context, 5522 hdr->rw_mode) == -EIO) 5523 return -EIO; 5524 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 5525 return -EIO; 5526 return 0; 5527} 5528 5529static int nfs4_write_done_cb(struct rpc_task *task, 5530 struct nfs_pgio_header *hdr) 5531{ 5532 struct inode *inode = hdr->inode; 5533 5534 trace_nfs4_write(hdr, task->tk_status); 5535 if (task->tk_status < 0) { 5536 struct nfs4_exception exception = { 5537 .inode = hdr->inode, 5538 .state = hdr->args.context->state, 5539 .stateid = &hdr->args.stateid, 5540 }; 5541 task->tk_status = nfs4_async_handle_exception(task, 5542 NFS_SERVER(inode), task->tk_status, 5543 &exception); 5544 if (exception.retry) { 5545 rpc_restart_call_prepare(task); 5546 return -EAGAIN; 5547 } 5548 } 5549 if (task->tk_status >= 0) { 5550 renew_lease(NFS_SERVER(inode), hdr->timestamp); 5551 nfs_writeback_update_inode(hdr); 5552 } 5553 return 0; 5554} 5555 5556static bool nfs4_write_stateid_changed(struct rpc_task *task, 5557 struct nfs_pgio_args *args) 5558{ 5559 5560 if (!nfs4_error_stateid_expired(task->tk_status) || 5561 nfs4_stateid_is_current(&args->stateid, 5562 args->context, 5563 args->lock_context, 5564 FMODE_WRITE)) 5565 return false; 5566 rpc_restart_call_prepare(task); 5567 return true; 5568} 5569 5570static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 5571{ 5572 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 5573 return -EAGAIN; 5574 if (nfs4_write_stateid_changed(task, &hdr->args)) 5575 return -EAGAIN; 5576 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 5577 nfs4_write_done_cb(task, hdr); 5578} 5579 5580static 5581bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 5582{ 5583 /* Don't request attributes for pNFS or O_DIRECT writes */ 5584 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 5585 return false; 5586 /* Otherwise, request attributes if and only if we don't hold 5587 * a delegation 5588 */ 5589 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 5590} 5591 5592void nfs4_bitmask_set(__u32 bitmask[], const __u32 src[], 5593 struct inode *inode, unsigned long cache_validity) 5594{ 5595 struct nfs_server *server = NFS_SERVER(inode); 5596 unsigned int i; 5597 5598 memcpy(bitmask, src, sizeof(*bitmask) * NFS4_BITMASK_SZ); 5599 cache_validity |= READ_ONCE(NFS_I(inode)->cache_validity); 5600 5601 if (cache_validity & NFS_INO_INVALID_CHANGE) 5602 bitmask[0] |= FATTR4_WORD0_CHANGE; 5603 if (cache_validity & NFS_INO_INVALID_ATIME) 5604 bitmask[1] |= FATTR4_WORD1_TIME_ACCESS; 5605 if (cache_validity & NFS_INO_INVALID_MODE) 5606 bitmask[1] |= FATTR4_WORD1_MODE; 5607 if (cache_validity & NFS_INO_INVALID_OTHER) 5608 bitmask[1] |= FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP; 5609 if (cache_validity & NFS_INO_INVALID_NLINK) 5610 bitmask[1] |= FATTR4_WORD1_NUMLINKS; 5611 if (cache_validity & NFS_INO_INVALID_CTIME) 5612 bitmask[1] |= FATTR4_WORD1_TIME_METADATA; 5613 if (cache_validity & NFS_INO_INVALID_MTIME) 5614 bitmask[1] |= FATTR4_WORD1_TIME_MODIFY; 5615 if (cache_validity & NFS_INO_INVALID_BLOCKS) 5616 bitmask[1] |= FATTR4_WORD1_SPACE_USED; 5617 5618 if (cache_validity & NFS_INO_INVALID_SIZE) 5619 bitmask[0] |= FATTR4_WORD0_SIZE; 5620 5621 for (i = 0; i < NFS4_BITMASK_SZ; i++) 5622 bitmask[i] &= server->attr_bitmask[i]; 5623} 5624 5625static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 5626 struct rpc_message *msg, 5627 struct rpc_clnt **clnt) 5628{ 5629 struct nfs_server *server = NFS_SERVER(hdr->inode); 5630 5631 if (!nfs4_write_need_cache_consistency_data(hdr)) { 5632 hdr->args.bitmask = NULL; 5633 hdr->res.fattr = NULL; 5634 } else { 5635 nfs4_bitmask_set(hdr->args.bitmask_store, 5636 server->cache_consistency_bitmask, 5637 hdr->inode, NFS_INO_INVALID_BLOCKS); 5638 hdr->args.bitmask = hdr->args.bitmask_store; 5639 } 5640 5641 if (!hdr->pgio_done_cb) 5642 hdr->pgio_done_cb = nfs4_write_done_cb; 5643 hdr->res.server = server; 5644 hdr->timestamp = jiffies; 5645 5646 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 5647 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0, 0); 5648 nfs4_state_protect_write(hdr->ds_clp ? hdr->ds_clp : server->nfs_client, clnt, msg, hdr); 5649} 5650 5651static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 5652{ 5653 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 5654 &data->args.seq_args, 5655 &data->res.seq_res, 5656 task); 5657} 5658 5659static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 5660{ 5661 struct inode *inode = data->inode; 5662 5663 trace_nfs4_commit(data, task->tk_status); 5664 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 5665 NULL, NULL) == -EAGAIN) { 5666 rpc_restart_call_prepare(task); 5667 return -EAGAIN; 5668 } 5669 return 0; 5670} 5671 5672static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 5673{ 5674 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5675 return -EAGAIN; 5676 return data->commit_done_cb(task, data); 5677} 5678 5679static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg, 5680 struct rpc_clnt **clnt) 5681{ 5682 struct nfs_server *server = NFS_SERVER(data->inode); 5683 5684 if (data->commit_done_cb == NULL) 5685 data->commit_done_cb = nfs4_commit_done_cb; 5686 data->res.server = server; 5687 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 5688 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 5689 nfs4_state_protect(data->ds_clp ? data->ds_clp : server->nfs_client, 5690 NFS_SP4_MACH_CRED_COMMIT, clnt, msg); 5691} 5692 5693static int _nfs4_proc_commit(struct file *dst, struct nfs_commitargs *args, 5694 struct nfs_commitres *res) 5695{ 5696 struct inode *dst_inode = file_inode(dst); 5697 struct nfs_server *server = NFS_SERVER(dst_inode); 5698 struct rpc_message msg = { 5699 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT], 5700 .rpc_argp = args, 5701 .rpc_resp = res, 5702 }; 5703 5704 args->fh = NFS_FH(dst_inode); 5705 return nfs4_call_sync(server->client, server, &msg, 5706 &args->seq_args, &res->seq_res, 1); 5707} 5708 5709int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res) 5710{ 5711 struct nfs_commitargs args = { 5712 .offset = offset, 5713 .count = count, 5714 }; 5715 struct nfs_server *dst_server = NFS_SERVER(file_inode(dst)); 5716 struct nfs4_exception exception = { }; 5717 int status; 5718 5719 do { 5720 status = _nfs4_proc_commit(dst, &args, res); 5721 status = nfs4_handle_exception(dst_server, status, &exception); 5722 } while (exception.retry); 5723 5724 return status; 5725} 5726 5727struct nfs4_renewdata { 5728 struct nfs_client *client; 5729 unsigned long timestamp; 5730}; 5731 5732/* 5733 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 5734 * standalone procedure for queueing an asynchronous RENEW. 5735 */ 5736static void nfs4_renew_release(void *calldata) 5737{ 5738 struct nfs4_renewdata *data = calldata; 5739 struct nfs_client *clp = data->client; 5740 5741 if (refcount_read(&clp->cl_count) > 1) 5742 nfs4_schedule_state_renewal(clp); 5743 nfs_put_client(clp); 5744 kfree(data); 5745} 5746 5747static void nfs4_renew_done(struct rpc_task *task, void *calldata) 5748{ 5749 struct nfs4_renewdata *data = calldata; 5750 struct nfs_client *clp = data->client; 5751 unsigned long timestamp = data->timestamp; 5752 5753 trace_nfs4_renew_async(clp, task->tk_status); 5754 switch (task->tk_status) { 5755 case 0: 5756 break; 5757 case -NFS4ERR_LEASE_MOVED: 5758 nfs4_schedule_lease_moved_recovery(clp); 5759 break; 5760 default: 5761 /* Unless we're shutting down, schedule state recovery! */ 5762 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 5763 return; 5764 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 5765 nfs4_schedule_lease_recovery(clp); 5766 return; 5767 } 5768 nfs4_schedule_path_down_recovery(clp); 5769 } 5770 do_renew_lease(clp, timestamp); 5771} 5772 5773static const struct rpc_call_ops nfs4_renew_ops = { 5774 .rpc_call_done = nfs4_renew_done, 5775 .rpc_release = nfs4_renew_release, 5776}; 5777 5778static int nfs4_proc_async_renew(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 5779{ 5780 struct rpc_message msg = { 5781 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5782 .rpc_argp = clp, 5783 .rpc_cred = cred, 5784 }; 5785 struct nfs4_renewdata *data; 5786 5787 if (renew_flags == 0) 5788 return 0; 5789 if (!refcount_inc_not_zero(&clp->cl_count)) 5790 return -EIO; 5791 data = kmalloc(sizeof(*data), GFP_NOFS); 5792 if (data == NULL) { 5793 nfs_put_client(clp); 5794 return -ENOMEM; 5795 } 5796 data->client = clp; 5797 data->timestamp = jiffies; 5798 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 5799 &nfs4_renew_ops, data); 5800} 5801 5802static int nfs4_proc_renew(struct nfs_client *clp, const struct cred *cred) 5803{ 5804 struct rpc_message msg = { 5805 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 5806 .rpc_argp = clp, 5807 .rpc_cred = cred, 5808 }; 5809 unsigned long now = jiffies; 5810 int status; 5811 5812 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5813 if (status < 0) 5814 return status; 5815 do_renew_lease(clp, now); 5816 return 0; 5817} 5818 5819static bool nfs4_server_supports_acls(const struct nfs_server *server, 5820 enum nfs4_acl_type type) 5821{ 5822 switch (type) { 5823 default: 5824 return server->attr_bitmask[0] & FATTR4_WORD0_ACL; 5825 case NFS4ACL_DACL: 5826 return server->attr_bitmask[1] & FATTR4_WORD1_DACL; 5827 case NFS4ACL_SACL: 5828 return server->attr_bitmask[1] & FATTR4_WORD1_SACL; 5829 } 5830} 5831 5832/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 5833 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 5834 * the stack. 5835 */ 5836#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 5837 5838int nfs4_buf_to_pages_noslab(const void *buf, size_t buflen, 5839 struct page **pages) 5840{ 5841 struct page *newpage, **spages; 5842 int rc = 0; 5843 size_t len; 5844 spages = pages; 5845 5846 do { 5847 len = min_t(size_t, PAGE_SIZE, buflen); 5848 newpage = alloc_page(GFP_KERNEL); 5849 5850 if (newpage == NULL) 5851 goto unwind; 5852 memcpy(page_address(newpage), buf, len); 5853 buf += len; 5854 buflen -= len; 5855 *pages++ = newpage; 5856 rc++; 5857 } while (buflen != 0); 5858 5859 return rc; 5860 5861unwind: 5862 for(; rc > 0; rc--) 5863 __free_page(spages[rc-1]); 5864 return -ENOMEM; 5865} 5866 5867struct nfs4_cached_acl { 5868 enum nfs4_acl_type type; 5869 int cached; 5870 size_t len; 5871 char data[]; 5872}; 5873 5874static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 5875{ 5876 struct nfs_inode *nfsi = NFS_I(inode); 5877 5878 spin_lock(&inode->i_lock); 5879 kfree(nfsi->nfs4_acl); 5880 nfsi->nfs4_acl = acl; 5881 spin_unlock(&inode->i_lock); 5882} 5883 5884static void nfs4_zap_acl_attr(struct inode *inode) 5885{ 5886 nfs4_set_cached_acl(inode, NULL); 5887} 5888 5889static ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, 5890 size_t buflen, enum nfs4_acl_type type) 5891{ 5892 struct nfs_inode *nfsi = NFS_I(inode); 5893 struct nfs4_cached_acl *acl; 5894 int ret = -ENOENT; 5895 5896 spin_lock(&inode->i_lock); 5897 acl = nfsi->nfs4_acl; 5898 if (acl == NULL) 5899 goto out; 5900 if (acl->type != type) 5901 goto out; 5902 if (buf == NULL) /* user is just asking for length */ 5903 goto out_len; 5904 if (acl->cached == 0) 5905 goto out; 5906 ret = -ERANGE; /* see getxattr(2) man page */ 5907 if (acl->len > buflen) 5908 goto out; 5909 memcpy(buf, acl->data, acl->len); 5910out_len: 5911 ret = acl->len; 5912out: 5913 spin_unlock(&inode->i_lock); 5914 return ret; 5915} 5916 5917static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, 5918 size_t pgbase, size_t acl_len, 5919 enum nfs4_acl_type type) 5920{ 5921 struct nfs4_cached_acl *acl; 5922 size_t buflen = sizeof(*acl) + acl_len; 5923 5924 if (buflen <= PAGE_SIZE) { 5925 acl = kmalloc(buflen, GFP_KERNEL); 5926 if (acl == NULL) 5927 goto out; 5928 acl->cached = 1; 5929 _copy_from_pages(acl->data, pages, pgbase, acl_len); 5930 } else { 5931 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 5932 if (acl == NULL) 5933 goto out; 5934 acl->cached = 0; 5935 } 5936 acl->type = type; 5937 acl->len = acl_len; 5938out: 5939 nfs4_set_cached_acl(inode, acl); 5940} 5941 5942/* 5943 * The getxattr API returns the required buffer length when called with a 5944 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 5945 * the required buf. On a NULL buf, we send a page of data to the server 5946 * guessing that the ACL request can be serviced by a page. If so, we cache 5947 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 5948 * the cache. If not so, we throw away the page, and cache the required 5949 * length. The next getxattr call will then produce another round trip to 5950 * the server, this time with the input buf of the required size. 5951 */ 5952static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, 5953 size_t buflen, enum nfs4_acl_type type) 5954{ 5955 struct page **pages; 5956 struct nfs_getaclargs args = { 5957 .fh = NFS_FH(inode), 5958 .acl_type = type, 5959 .acl_len = buflen, 5960 }; 5961 struct nfs_getaclres res = { 5962 .acl_type = type, 5963 .acl_len = buflen, 5964 }; 5965 struct rpc_message msg = { 5966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5967 .rpc_argp = &args, 5968 .rpc_resp = &res, 5969 }; 5970 unsigned int npages; 5971 int ret = -ENOMEM, i; 5972 struct nfs_server *server = NFS_SERVER(inode); 5973 5974 if (buflen == 0) 5975 buflen = server->rsize; 5976 5977 npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 5978 pages = kmalloc_array(npages, sizeof(struct page *), GFP_KERNEL); 5979 if (!pages) 5980 return -ENOMEM; 5981 5982 args.acl_pages = pages; 5983 5984 for (i = 0; i < npages; i++) { 5985 pages[i] = alloc_page(GFP_KERNEL); 5986 if (!pages[i]) 5987 goto out_free; 5988 } 5989 5990 /* for decoding across pages */ 5991 res.acl_scratch = alloc_page(GFP_KERNEL); 5992 if (!res.acl_scratch) 5993 goto out_free; 5994 5995 args.acl_len = npages * PAGE_SIZE; 5996 5997 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 5998 __func__, buf, buflen, npages, args.acl_len); 5999 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 6000 &msg, &args.seq_args, &res.seq_res, 0); 6001 if (ret) 6002 goto out_free; 6003 6004 /* Handle the case where the passed-in buffer is too short */ 6005 if (res.acl_flags & NFS4_ACL_TRUNC) { 6006 /* Did the user only issue a request for the acl length? */ 6007 if (buf == NULL) 6008 goto out_ok; 6009 ret = -ERANGE; 6010 goto out_free; 6011 } 6012 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len, 6013 type); 6014 if (buf) { 6015 if (res.acl_len > buflen) { 6016 ret = -ERANGE; 6017 goto out_free; 6018 } 6019 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 6020 } 6021out_ok: 6022 ret = res.acl_len; 6023out_free: 6024 while (--i >= 0) 6025 __free_page(pages[i]); 6026 if (res.acl_scratch) 6027 __free_page(res.acl_scratch); 6028 kfree(pages); 6029 return ret; 6030} 6031 6032static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, 6033 size_t buflen, enum nfs4_acl_type type) 6034{ 6035 struct nfs4_exception exception = { 6036 .interruptible = true, 6037 }; 6038 ssize_t ret; 6039 do { 6040 ret = __nfs4_get_acl_uncached(inode, buf, buflen, type); 6041 trace_nfs4_get_acl(inode, ret); 6042 if (ret >= 0) 6043 break; 6044 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 6045 } while (exception.retry); 6046 return ret; 6047} 6048 6049static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen, 6050 enum nfs4_acl_type type) 6051{ 6052 struct nfs_server *server = NFS_SERVER(inode); 6053 int ret; 6054 6055 if (!nfs4_server_supports_acls(server, type)) 6056 return -EOPNOTSUPP; 6057 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 6058 if (ret < 0) 6059 return ret; 6060 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 6061 nfs_zap_acl_cache(inode); 6062 ret = nfs4_read_cached_acl(inode, buf, buflen, type); 6063 if (ret != -ENOENT) 6064 /* -ENOENT is returned if there is no ACL or if there is an ACL 6065 * but no cached acl data, just the acl length */ 6066 return ret; 6067 return nfs4_get_acl_uncached(inode, buf, buflen, type); 6068} 6069 6070static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, 6071 size_t buflen, enum nfs4_acl_type type) 6072{ 6073 struct nfs_server *server = NFS_SERVER(inode); 6074 struct page *pages[NFS4ACL_MAXPAGES]; 6075 struct nfs_setaclargs arg = { 6076 .fh = NFS_FH(inode), 6077 .acl_type = type, 6078 .acl_len = buflen, 6079 .acl_pages = pages, 6080 }; 6081 struct nfs_setaclres res; 6082 struct rpc_message msg = { 6083 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 6084 .rpc_argp = &arg, 6085 .rpc_resp = &res, 6086 }; 6087 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 6088 int ret, i; 6089 6090 /* You can't remove system.nfs4_acl: */ 6091 if (buflen == 0) 6092 return -EINVAL; 6093 if (!nfs4_server_supports_acls(server, type)) 6094 return -EOPNOTSUPP; 6095 if (npages > ARRAY_SIZE(pages)) 6096 return -ERANGE; 6097 i = nfs4_buf_to_pages_noslab(buf, buflen, arg.acl_pages); 6098 if (i < 0) 6099 return i; 6100 nfs4_inode_make_writeable(inode); 6101 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6102 6103 /* 6104 * Free each page after tx, so the only ref left is 6105 * held by the network stack 6106 */ 6107 for (; i > 0; i--) 6108 put_page(pages[i-1]); 6109 6110 /* 6111 * Acl update can result in inode attribute update. 6112 * so mark the attribute cache invalid. 6113 */ 6114 spin_lock(&inode->i_lock); 6115 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | 6116 NFS_INO_INVALID_CTIME | 6117 NFS_INO_REVAL_FORCED); 6118 spin_unlock(&inode->i_lock); 6119 nfs_access_zap_cache(inode); 6120 nfs_zap_acl_cache(inode); 6121 return ret; 6122} 6123 6124static int nfs4_proc_set_acl(struct inode *inode, const void *buf, 6125 size_t buflen, enum nfs4_acl_type type) 6126{ 6127 struct nfs4_exception exception = { }; 6128 int err; 6129 do { 6130 err = __nfs4_proc_set_acl(inode, buf, buflen, type); 6131 trace_nfs4_set_acl(inode, err); 6132 if (err == -NFS4ERR_BADOWNER || err == -NFS4ERR_BADNAME) { 6133 /* 6134 * no need to retry since the kernel 6135 * isn't involved in encoding the ACEs. 6136 */ 6137 err = -EINVAL; 6138 break; 6139 } 6140 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6141 &exception); 6142 } while (exception.retry); 6143 return err; 6144} 6145 6146#ifdef CONFIG_NFS_V4_SECURITY_LABEL 6147static int _nfs4_get_security_label(struct inode *inode, void *buf, 6148 size_t buflen) 6149{ 6150 struct nfs_server *server = NFS_SERVER(inode); 6151 struct nfs4_label label = {0, 0, buflen, buf}; 6152 6153 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6154 struct nfs_fattr fattr = { 6155 .label = &label, 6156 }; 6157 struct nfs4_getattr_arg arg = { 6158 .fh = NFS_FH(inode), 6159 .bitmask = bitmask, 6160 }; 6161 struct nfs4_getattr_res res = { 6162 .fattr = &fattr, 6163 .server = server, 6164 }; 6165 struct rpc_message msg = { 6166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 6167 .rpc_argp = &arg, 6168 .rpc_resp = &res, 6169 }; 6170 int ret; 6171 6172 nfs_fattr_init(&fattr); 6173 6174 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 6175 if (ret) 6176 return ret; 6177 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 6178 return -ENOENT; 6179 return label.len; 6180} 6181 6182static int nfs4_get_security_label(struct inode *inode, void *buf, 6183 size_t buflen) 6184{ 6185 struct nfs4_exception exception = { 6186 .interruptible = true, 6187 }; 6188 int err; 6189 6190 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6191 return -EOPNOTSUPP; 6192 6193 do { 6194 err = _nfs4_get_security_label(inode, buf, buflen); 6195 trace_nfs4_get_security_label(inode, err); 6196 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6197 &exception); 6198 } while (exception.retry); 6199 return err; 6200} 6201 6202static int _nfs4_do_set_security_label(struct inode *inode, 6203 struct nfs4_label *ilabel, 6204 struct nfs_fattr *fattr) 6205{ 6206 6207 struct iattr sattr = {0}; 6208 struct nfs_server *server = NFS_SERVER(inode); 6209 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 6210 struct nfs_setattrargs arg = { 6211 .fh = NFS_FH(inode), 6212 .iap = &sattr, 6213 .server = server, 6214 .bitmask = bitmask, 6215 .label = ilabel, 6216 }; 6217 struct nfs_setattrres res = { 6218 .fattr = fattr, 6219 .server = server, 6220 }; 6221 struct rpc_message msg = { 6222 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 6223 .rpc_argp = &arg, 6224 .rpc_resp = &res, 6225 }; 6226 int status; 6227 6228 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 6229 6230 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6231 if (status) 6232 dprintk("%s failed: %d\n", __func__, status); 6233 6234 return status; 6235} 6236 6237static int nfs4_do_set_security_label(struct inode *inode, 6238 struct nfs4_label *ilabel, 6239 struct nfs_fattr *fattr) 6240{ 6241 struct nfs4_exception exception = { }; 6242 int err; 6243 6244 do { 6245 err = _nfs4_do_set_security_label(inode, ilabel, fattr); 6246 trace_nfs4_set_security_label(inode, err); 6247 err = nfs4_handle_exception(NFS_SERVER(inode), err, 6248 &exception); 6249 } while (exception.retry); 6250 return err; 6251} 6252 6253static int 6254nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 6255{ 6256 struct nfs4_label ilabel = {0, 0, buflen, (char *)buf }; 6257 struct nfs_fattr *fattr; 6258 int status; 6259 6260 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 6261 return -EOPNOTSUPP; 6262 6263 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode)); 6264 if (fattr == NULL) 6265 return -ENOMEM; 6266 6267 status = nfs4_do_set_security_label(inode, &ilabel, fattr); 6268 if (status == 0) 6269 nfs_setsecurity(inode, fattr); 6270 6271 return status; 6272} 6273#endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 6274 6275 6276static void nfs4_init_boot_verifier(const struct nfs_client *clp, 6277 nfs4_verifier *bootverf) 6278{ 6279 __be32 verf[2]; 6280 6281 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 6282 /* An impossible timestamp guarantees this value 6283 * will never match a generated boot time. */ 6284 verf[0] = cpu_to_be32(U32_MAX); 6285 verf[1] = cpu_to_be32(U32_MAX); 6286 } else { 6287 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6288 u64 ns = ktime_to_ns(nn->boot_time); 6289 6290 verf[0] = cpu_to_be32(ns >> 32); 6291 verf[1] = cpu_to_be32(ns); 6292 } 6293 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 6294} 6295 6296static size_t 6297nfs4_get_uniquifier(struct nfs_client *clp, char *buf, size_t buflen) 6298{ 6299 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 6300 struct nfs_netns_client *nn_clp = nn->nfs_client; 6301 const char *id; 6302 6303 buf[0] = '\0'; 6304 6305 if (nn_clp) { 6306 rcu_read_lock(); 6307 id = rcu_dereference(nn_clp->identifier); 6308 if (id) 6309 strscpy(buf, id, buflen); 6310 rcu_read_unlock(); 6311 } 6312 6313 if (nfs4_client_id_uniquifier[0] != '\0' && buf[0] == '\0') 6314 strscpy(buf, nfs4_client_id_uniquifier, buflen); 6315 6316 return strlen(buf); 6317} 6318 6319static int 6320nfs4_init_nonuniform_client_string(struct nfs_client *clp) 6321{ 6322 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6323 size_t buflen; 6324 size_t len; 6325 char *str; 6326 6327 if (clp->cl_owner_id != NULL) 6328 return 0; 6329 6330 rcu_read_lock(); 6331 len = 14 + 6332 strlen(clp->cl_rpcclient->cl_nodename) + 6333 1 + 6334 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 6335 1; 6336 rcu_read_unlock(); 6337 6338 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6339 if (buflen) 6340 len += buflen + 1; 6341 6342 if (len > NFS4_OPAQUE_LIMIT + 1) 6343 return -EINVAL; 6344 6345 /* 6346 * Since this string is allocated at mount time, and held until the 6347 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6348 * about a memory-reclaim deadlock. 6349 */ 6350 str = kmalloc(len, GFP_KERNEL); 6351 if (!str) 6352 return -ENOMEM; 6353 6354 rcu_read_lock(); 6355 if (buflen) 6356 scnprintf(str, len, "Linux NFSv4.0 %s/%s/%s", 6357 clp->cl_rpcclient->cl_nodename, buf, 6358 rpc_peeraddr2str(clp->cl_rpcclient, 6359 RPC_DISPLAY_ADDR)); 6360 else 6361 scnprintf(str, len, "Linux NFSv4.0 %s/%s", 6362 clp->cl_rpcclient->cl_nodename, 6363 rpc_peeraddr2str(clp->cl_rpcclient, 6364 RPC_DISPLAY_ADDR)); 6365 rcu_read_unlock(); 6366 6367 clp->cl_owner_id = str; 6368 return 0; 6369} 6370 6371static int 6372nfs4_init_uniform_client_string(struct nfs_client *clp) 6373{ 6374 char buf[NFS4_CLIENT_ID_UNIQ_LEN]; 6375 size_t buflen; 6376 size_t len; 6377 char *str; 6378 6379 if (clp->cl_owner_id != NULL) 6380 return 0; 6381 6382 len = 10 + 10 + 1 + 10 + 1 + 6383 strlen(clp->cl_rpcclient->cl_nodename) + 1; 6384 6385 buflen = nfs4_get_uniquifier(clp, buf, sizeof(buf)); 6386 if (buflen) 6387 len += buflen + 1; 6388 6389 if (len > NFS4_OPAQUE_LIMIT + 1) 6390 return -EINVAL; 6391 6392 /* 6393 * Since this string is allocated at mount time, and held until the 6394 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 6395 * about a memory-reclaim deadlock. 6396 */ 6397 str = kmalloc(len, GFP_KERNEL); 6398 if (!str) 6399 return -ENOMEM; 6400 6401 if (buflen) 6402 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 6403 clp->rpc_ops->version, clp->cl_minorversion, 6404 buf, clp->cl_rpcclient->cl_nodename); 6405 else 6406 scnprintf(str, len, "Linux NFSv%u.%u %s", 6407 clp->rpc_ops->version, clp->cl_minorversion, 6408 clp->cl_rpcclient->cl_nodename); 6409 clp->cl_owner_id = str; 6410 return 0; 6411} 6412 6413/* 6414 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 6415 * services. Advertise one based on the address family of the 6416 * clientaddr. 6417 */ 6418static unsigned int 6419nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 6420{ 6421 if (strchr(clp->cl_ipaddr, ':') != NULL) 6422 return scnprintf(buf, len, "tcp6"); 6423 else 6424 return scnprintf(buf, len, "tcp"); 6425} 6426 6427static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 6428{ 6429 struct nfs4_setclientid *sc = calldata; 6430 6431 if (task->tk_status == 0) 6432 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 6433} 6434 6435static const struct rpc_call_ops nfs4_setclientid_ops = { 6436 .rpc_call_done = nfs4_setclientid_done, 6437}; 6438 6439/** 6440 * nfs4_proc_setclientid - Negotiate client ID 6441 * @clp: state data structure 6442 * @program: RPC program for NFSv4 callback service 6443 * @port: IP port number for NFS4 callback service 6444 * @cred: credential to use for this call 6445 * @res: where to place the result 6446 * 6447 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6448 */ 6449int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 6450 unsigned short port, const struct cred *cred, 6451 struct nfs4_setclientid_res *res) 6452{ 6453 nfs4_verifier sc_verifier; 6454 struct nfs4_setclientid setclientid = { 6455 .sc_verifier = &sc_verifier, 6456 .sc_prog = program, 6457 .sc_clnt = clp, 6458 }; 6459 struct rpc_message msg = { 6460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 6461 .rpc_argp = &setclientid, 6462 .rpc_resp = res, 6463 .rpc_cred = cred, 6464 }; 6465 struct rpc_task_setup task_setup_data = { 6466 .rpc_client = clp->cl_rpcclient, 6467 .rpc_message = &msg, 6468 .callback_ops = &nfs4_setclientid_ops, 6469 .callback_data = &setclientid, 6470 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 6471 }; 6472 unsigned long now = jiffies; 6473 int status; 6474 6475 /* nfs_client_id4 */ 6476 nfs4_init_boot_verifier(clp, &sc_verifier); 6477 6478 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 6479 status = nfs4_init_uniform_client_string(clp); 6480 else 6481 status = nfs4_init_nonuniform_client_string(clp); 6482 6483 if (status) 6484 goto out; 6485 6486 /* cb_client4 */ 6487 setclientid.sc_netid_len = 6488 nfs4_init_callback_netid(clp, 6489 setclientid.sc_netid, 6490 sizeof(setclientid.sc_netid)); 6491 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 6492 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 6493 clp->cl_ipaddr, port >> 8, port & 255); 6494 6495 dprintk("NFS call setclientid auth=%s, '%s'\n", 6496 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6497 clp->cl_owner_id); 6498 6499 status = nfs4_call_sync_custom(&task_setup_data); 6500 if (setclientid.sc_cred) { 6501 kfree(clp->cl_acceptor); 6502 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 6503 put_rpccred(setclientid.sc_cred); 6504 } 6505 6506 if (status == 0) 6507 do_renew_lease(clp, now); 6508out: 6509 trace_nfs4_setclientid(clp, status); 6510 dprintk("NFS reply setclientid: %d\n", status); 6511 return status; 6512} 6513 6514/** 6515 * nfs4_proc_setclientid_confirm - Confirm client ID 6516 * @clp: state data structure 6517 * @arg: result of a previous SETCLIENTID 6518 * @cred: credential to use for this call 6519 * 6520 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6521 */ 6522int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 6523 struct nfs4_setclientid_res *arg, 6524 const struct cred *cred) 6525{ 6526 struct rpc_message msg = { 6527 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 6528 .rpc_argp = arg, 6529 .rpc_cred = cred, 6530 }; 6531 int status; 6532 6533 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 6534 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6535 clp->cl_clientid); 6536 status = rpc_call_sync(clp->cl_rpcclient, &msg, 6537 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 6538 trace_nfs4_setclientid_confirm(clp, status); 6539 dprintk("NFS reply setclientid_confirm: %d\n", status); 6540 return status; 6541} 6542 6543struct nfs4_delegreturndata { 6544 struct nfs4_delegreturnargs args; 6545 struct nfs4_delegreturnres res; 6546 struct nfs_fh fh; 6547 nfs4_stateid stateid; 6548 unsigned long timestamp; 6549 struct { 6550 struct nfs4_layoutreturn_args arg; 6551 struct nfs4_layoutreturn_res res; 6552 struct nfs4_xdr_opaque_data ld_private; 6553 u32 roc_barrier; 6554 bool roc; 6555 } lr; 6556 struct nfs_fattr fattr; 6557 int rpc_status; 6558 struct inode *inode; 6559}; 6560 6561static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 6562{ 6563 struct nfs4_delegreturndata *data = calldata; 6564 struct nfs4_exception exception = { 6565 .inode = data->inode, 6566 .stateid = &data->stateid, 6567 .task_is_privileged = data->args.seq_args.sa_privileged, 6568 }; 6569 6570 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6571 return; 6572 6573 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 6574 6575 /* Handle Layoutreturn errors */ 6576 if (pnfs_roc_done(task, &data->args.lr_args, &data->res.lr_res, 6577 &data->res.lr_ret) == -EAGAIN) 6578 goto out_restart; 6579 6580 switch (task->tk_status) { 6581 case 0: 6582 renew_lease(data->res.server, data->timestamp); 6583 break; 6584 case -NFS4ERR_ADMIN_REVOKED: 6585 case -NFS4ERR_DELEG_REVOKED: 6586 case -NFS4ERR_EXPIRED: 6587 nfs4_free_revoked_stateid(data->res.server, 6588 data->args.stateid, 6589 task->tk_msg.rpc_cred); 6590 fallthrough; 6591 case -NFS4ERR_BAD_STATEID: 6592 case -NFS4ERR_STALE_STATEID: 6593 case -ETIMEDOUT: 6594 task->tk_status = 0; 6595 break; 6596 case -NFS4ERR_OLD_STATEID: 6597 if (!nfs4_refresh_delegation_stateid(&data->stateid, data->inode)) 6598 nfs4_stateid_seqid_inc(&data->stateid); 6599 if (data->args.bitmask) { 6600 data->args.bitmask = NULL; 6601 data->res.fattr = NULL; 6602 } 6603 goto out_restart; 6604 case -NFS4ERR_ACCESS: 6605 if (data->args.bitmask) { 6606 data->args.bitmask = NULL; 6607 data->res.fattr = NULL; 6608 goto out_restart; 6609 } 6610 fallthrough; 6611 default: 6612 task->tk_status = nfs4_async_handle_exception(task, 6613 data->res.server, task->tk_status, 6614 &exception); 6615 if (exception.retry) 6616 goto out_restart; 6617 } 6618 nfs_delegation_mark_returned(data->inode, data->args.stateid); 6619 data->rpc_status = task->tk_status; 6620 return; 6621out_restart: 6622 task->tk_status = 0; 6623 rpc_restart_call_prepare(task); 6624} 6625 6626static void nfs4_delegreturn_release(void *calldata) 6627{ 6628 struct nfs4_delegreturndata *data = calldata; 6629 struct inode *inode = data->inode; 6630 6631 if (data->lr.roc) 6632 pnfs_roc_release(&data->lr.arg, &data->lr.res, 6633 data->res.lr_ret); 6634 if (inode) { 6635 nfs4_fattr_set_prechange(&data->fattr, 6636 inode_peek_iversion_raw(inode)); 6637 nfs_refresh_inode(inode, &data->fattr); 6638 nfs_iput_and_deactive(inode); 6639 } 6640 kfree(calldata); 6641} 6642 6643static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 6644{ 6645 struct nfs4_delegreturndata *d_data; 6646 struct pnfs_layout_hdr *lo; 6647 6648 d_data = data; 6649 6650 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) { 6651 nfs4_sequence_done(task, &d_data->res.seq_res); 6652 return; 6653 } 6654 6655 lo = d_data->args.lr_args ? d_data->args.lr_args->layout : NULL; 6656 if (lo && !pnfs_layout_is_valid(lo)) { 6657 d_data->args.lr_args = NULL; 6658 d_data->res.lr_res = NULL; 6659 } 6660 6661 nfs4_setup_sequence(d_data->res.server->nfs_client, 6662 &d_data->args.seq_args, 6663 &d_data->res.seq_res, 6664 task); 6665} 6666 6667static const struct rpc_call_ops nfs4_delegreturn_ops = { 6668 .rpc_call_prepare = nfs4_delegreturn_prepare, 6669 .rpc_call_done = nfs4_delegreturn_done, 6670 .rpc_release = nfs4_delegreturn_release, 6671}; 6672 6673static int _nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6674{ 6675 struct nfs4_delegreturndata *data; 6676 struct nfs_server *server = NFS_SERVER(inode); 6677 struct rpc_task *task; 6678 struct rpc_message msg = { 6679 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 6680 .rpc_cred = cred, 6681 }; 6682 struct rpc_task_setup task_setup_data = { 6683 .rpc_client = server->client, 6684 .rpc_message = &msg, 6685 .callback_ops = &nfs4_delegreturn_ops, 6686 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 6687 }; 6688 int status = 0; 6689 6690 if (nfs_server_capable(inode, NFS_CAP_MOVEABLE)) 6691 task_setup_data.flags |= RPC_TASK_MOVEABLE; 6692 6693 data = kzalloc(sizeof(*data), GFP_KERNEL); 6694 if (data == NULL) 6695 return -ENOMEM; 6696 6697 nfs4_state_protect(server->nfs_client, 6698 NFS_SP4_MACH_CRED_CLEANUP, 6699 &task_setup_data.rpc_client, &msg); 6700 6701 data->args.fhandle = &data->fh; 6702 data->args.stateid = &data->stateid; 6703 nfs4_bitmask_set(data->args.bitmask_store, 6704 server->cache_consistency_bitmask, inode, 0); 6705 data->args.bitmask = data->args.bitmask_store; 6706 nfs_copy_fh(&data->fh, NFS_FH(inode)); 6707 nfs4_stateid_copy(&data->stateid, stateid); 6708 data->res.fattr = &data->fattr; 6709 data->res.server = server; 6710 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 6711 data->lr.arg.ld_private = &data->lr.ld_private; 6712 nfs_fattr_init(data->res.fattr); 6713 data->timestamp = jiffies; 6714 data->rpc_status = 0; 6715 data->inode = nfs_igrab_and_active(inode); 6716 if (data->inode || issync) { 6717 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, 6718 cred); 6719 if (data->lr.roc) { 6720 data->args.lr_args = &data->lr.arg; 6721 data->res.lr_res = &data->lr.res; 6722 } 6723 } 6724 6725 if (!data->inode) 6726 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6727 1); 6728 else 6729 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 6730 0); 6731 task_setup_data.callback_data = data; 6732 msg.rpc_argp = &data->args; 6733 msg.rpc_resp = &data->res; 6734 task = rpc_run_task(&task_setup_data); 6735 if (IS_ERR(task)) 6736 return PTR_ERR(task); 6737 if (!issync) 6738 goto out; 6739 status = rpc_wait_for_completion_task(task); 6740 if (status != 0) 6741 goto out; 6742 status = data->rpc_status; 6743out: 6744 rpc_put_task(task); 6745 return status; 6746} 6747 6748int nfs4_proc_delegreturn(struct inode *inode, const struct cred *cred, const nfs4_stateid *stateid, int issync) 6749{ 6750 struct nfs_server *server = NFS_SERVER(inode); 6751 struct nfs4_exception exception = { }; 6752 int err; 6753 do { 6754 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 6755 trace_nfs4_delegreturn(inode, stateid, err); 6756 switch (err) { 6757 case -NFS4ERR_STALE_STATEID: 6758 case -NFS4ERR_EXPIRED: 6759 case 0: 6760 return 0; 6761 } 6762 err = nfs4_handle_exception(server, err, &exception); 6763 } while (exception.retry); 6764 return err; 6765} 6766 6767static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6768{ 6769 struct inode *inode = state->inode; 6770 struct nfs_server *server = NFS_SERVER(inode); 6771 struct nfs_client *clp = server->nfs_client; 6772 struct nfs_lockt_args arg = { 6773 .fh = NFS_FH(inode), 6774 .fl = request, 6775 }; 6776 struct nfs_lockt_res res = { 6777 .denied = request, 6778 }; 6779 struct rpc_message msg = { 6780 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 6781 .rpc_argp = &arg, 6782 .rpc_resp = &res, 6783 .rpc_cred = state->owner->so_cred, 6784 }; 6785 struct nfs4_lock_state *lsp; 6786 int status; 6787 6788 arg.lock_owner.clientid = clp->cl_clientid; 6789 status = nfs4_set_lock_state(state, request); 6790 if (status != 0) 6791 goto out; 6792 lsp = request->fl_u.nfs4_fl.owner; 6793 arg.lock_owner.id = lsp->ls_seqid.owner_id; 6794 arg.lock_owner.s_dev = server->s_dev; 6795 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 6796 switch (status) { 6797 case 0: 6798 request->c.flc_type = F_UNLCK; 6799 break; 6800 case -NFS4ERR_DENIED: 6801 status = 0; 6802 } 6803 request->fl_ops->fl_release_private(request); 6804 request->fl_ops = NULL; 6805out: 6806 return status; 6807} 6808 6809static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6810{ 6811 struct nfs4_exception exception = { 6812 .interruptible = true, 6813 }; 6814 int err; 6815 6816 do { 6817 err = _nfs4_proc_getlk(state, cmd, request); 6818 trace_nfs4_get_lock(request, state, cmd, err); 6819 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 6820 &exception); 6821 } while (exception.retry); 6822 return err; 6823} 6824 6825/* 6826 * Update the seqid of a lock stateid after receiving 6827 * NFS4ERR_OLD_STATEID 6828 */ 6829static bool nfs4_refresh_lock_old_stateid(nfs4_stateid *dst, 6830 struct nfs4_lock_state *lsp) 6831{ 6832 struct nfs4_state *state = lsp->ls_state; 6833 bool ret = false; 6834 6835 spin_lock(&state->state_lock); 6836 if (!nfs4_stateid_match_other(dst, &lsp->ls_stateid)) 6837 goto out; 6838 if (!nfs4_stateid_is_newer(&lsp->ls_stateid, dst)) 6839 nfs4_stateid_seqid_inc(dst); 6840 else 6841 dst->seqid = lsp->ls_stateid.seqid; 6842 ret = true; 6843out: 6844 spin_unlock(&state->state_lock); 6845 return ret; 6846} 6847 6848static bool nfs4_sync_lock_stateid(nfs4_stateid *dst, 6849 struct nfs4_lock_state *lsp) 6850{ 6851 struct nfs4_state *state = lsp->ls_state; 6852 bool ret; 6853 6854 spin_lock(&state->state_lock); 6855 ret = !nfs4_stateid_match_other(dst, &lsp->ls_stateid); 6856 nfs4_stateid_copy(dst, &lsp->ls_stateid); 6857 spin_unlock(&state->state_lock); 6858 return ret; 6859} 6860 6861struct nfs4_unlockdata { 6862 struct nfs_locku_args arg; 6863 struct nfs_locku_res res; 6864 struct nfs4_lock_state *lsp; 6865 struct nfs_open_context *ctx; 6866 struct nfs_lock_context *l_ctx; 6867 struct file_lock fl; 6868 struct nfs_server *server; 6869 unsigned long timestamp; 6870}; 6871 6872static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 6873 struct nfs_open_context *ctx, 6874 struct nfs4_lock_state *lsp, 6875 struct nfs_seqid *seqid) 6876{ 6877 struct nfs4_unlockdata *p; 6878 struct nfs4_state *state = lsp->ls_state; 6879 struct inode *inode = state->inode; 6880 6881 p = kzalloc(sizeof(*p), GFP_KERNEL); 6882 if (p == NULL) 6883 return NULL; 6884 p->arg.fh = NFS_FH(inode); 6885 p->arg.fl = &p->fl; 6886 p->arg.seqid = seqid; 6887 p->res.seqid = seqid; 6888 p->lsp = lsp; 6889 /* Ensure we don't close file until we're done freeing locks! */ 6890 p->ctx = get_nfs_open_context(ctx); 6891 p->l_ctx = nfs_get_lock_context(ctx); 6892 locks_init_lock(&p->fl); 6893 locks_copy_lock(&p->fl, fl); 6894 p->server = NFS_SERVER(inode); 6895 spin_lock(&state->state_lock); 6896 nfs4_stateid_copy(&p->arg.stateid, &lsp->ls_stateid); 6897 spin_unlock(&state->state_lock); 6898 return p; 6899} 6900 6901static void nfs4_locku_release_calldata(void *data) 6902{ 6903 struct nfs4_unlockdata *calldata = data; 6904 nfs_free_seqid(calldata->arg.seqid); 6905 nfs4_put_lock_state(calldata->lsp); 6906 nfs_put_lock_context(calldata->l_ctx); 6907 put_nfs_open_context(calldata->ctx); 6908 kfree(calldata); 6909} 6910 6911static void nfs4_locku_done(struct rpc_task *task, void *data) 6912{ 6913 struct nfs4_unlockdata *calldata = data; 6914 struct nfs4_exception exception = { 6915 .inode = calldata->lsp->ls_state->inode, 6916 .stateid = &calldata->arg.stateid, 6917 }; 6918 6919 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 6920 return; 6921 switch (task->tk_status) { 6922 case 0: 6923 renew_lease(calldata->server, calldata->timestamp); 6924 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 6925 if (nfs4_update_lock_stateid(calldata->lsp, 6926 &calldata->res.stateid)) 6927 break; 6928 fallthrough; 6929 case -NFS4ERR_ADMIN_REVOKED: 6930 case -NFS4ERR_EXPIRED: 6931 nfs4_free_revoked_stateid(calldata->server, 6932 &calldata->arg.stateid, 6933 task->tk_msg.rpc_cred); 6934 fallthrough; 6935 case -NFS4ERR_BAD_STATEID: 6936 case -NFS4ERR_STALE_STATEID: 6937 if (nfs4_sync_lock_stateid(&calldata->arg.stateid, 6938 calldata->lsp)) 6939 rpc_restart_call_prepare(task); 6940 break; 6941 case -NFS4ERR_OLD_STATEID: 6942 if (nfs4_refresh_lock_old_stateid(&calldata->arg.stateid, 6943 calldata->lsp)) 6944 rpc_restart_call_prepare(task); 6945 break; 6946 default: 6947 task->tk_status = nfs4_async_handle_exception(task, 6948 calldata->server, task->tk_status, 6949 &exception); 6950 if (exception.retry) 6951 rpc_restart_call_prepare(task); 6952 } 6953 nfs_release_seqid(calldata->arg.seqid); 6954} 6955 6956static void nfs4_locku_prepare(struct rpc_task *task, void *data) 6957{ 6958 struct nfs4_unlockdata *calldata = data; 6959 6960 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 6961 nfs_async_iocounter_wait(task, calldata->l_ctx)) 6962 return; 6963 6964 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 6965 goto out_wait; 6966 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 6967 /* Note: exit _without_ running nfs4_locku_done */ 6968 goto out_no_action; 6969 } 6970 calldata->timestamp = jiffies; 6971 if (nfs4_setup_sequence(calldata->server->nfs_client, 6972 &calldata->arg.seq_args, 6973 &calldata->res.seq_res, 6974 task) != 0) 6975 nfs_release_seqid(calldata->arg.seqid); 6976 return; 6977out_no_action: 6978 task->tk_action = NULL; 6979out_wait: 6980 nfs4_sequence_done(task, &calldata->res.seq_res); 6981} 6982 6983static const struct rpc_call_ops nfs4_locku_ops = { 6984 .rpc_call_prepare = nfs4_locku_prepare, 6985 .rpc_call_done = nfs4_locku_done, 6986 .rpc_release = nfs4_locku_release_calldata, 6987}; 6988 6989static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 6990 struct nfs_open_context *ctx, 6991 struct nfs4_lock_state *lsp, 6992 struct nfs_seqid *seqid) 6993{ 6994 struct nfs4_unlockdata *data; 6995 struct rpc_message msg = { 6996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 6997 .rpc_cred = ctx->cred, 6998 }; 6999 struct rpc_task_setup task_setup_data = { 7000 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 7001 .rpc_message = &msg, 7002 .callback_ops = &nfs4_locku_ops, 7003 .workqueue = nfsiod_workqueue, 7004 .flags = RPC_TASK_ASYNC, 7005 }; 7006 7007 if (nfs_server_capable(lsp->ls_state->inode, NFS_CAP_MOVEABLE)) 7008 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7009 7010 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 7011 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 7012 7013 /* Ensure this is an unlock - when canceling a lock, the 7014 * canceled lock is passed in, and it won't be an unlock. 7015 */ 7016 fl->c.flc_type = F_UNLCK; 7017 if (fl->c.flc_flags & FL_CLOSE) 7018 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 7019 7020 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 7021 if (data == NULL) { 7022 nfs_free_seqid(seqid); 7023 return ERR_PTR(-ENOMEM); 7024 } 7025 7026 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 0); 7027 msg.rpc_argp = &data->arg; 7028 msg.rpc_resp = &data->res; 7029 task_setup_data.callback_data = data; 7030 return rpc_run_task(&task_setup_data); 7031} 7032 7033static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 7034{ 7035 struct inode *inode = state->inode; 7036 struct nfs4_state_owner *sp = state->owner; 7037 struct nfs_inode *nfsi = NFS_I(inode); 7038 struct nfs_seqid *seqid; 7039 struct nfs4_lock_state *lsp; 7040 struct rpc_task *task; 7041 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 7042 int status = 0; 7043 unsigned char saved_flags = request->c.flc_flags; 7044 7045 status = nfs4_set_lock_state(state, request); 7046 /* Unlock _before_ we do the RPC call */ 7047 request->c.flc_flags |= FL_EXISTS; 7048 /* Exclude nfs_delegation_claim_locks() */ 7049 mutex_lock(&sp->so_delegreturn_mutex); 7050 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 7051 down_read(&nfsi->rwsem); 7052 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 7053 up_read(&nfsi->rwsem); 7054 mutex_unlock(&sp->so_delegreturn_mutex); 7055 goto out; 7056 } 7057 lsp = request->fl_u.nfs4_fl.owner; 7058 set_bit(NFS_LOCK_UNLOCKING, &lsp->ls_flags); 7059 up_read(&nfsi->rwsem); 7060 mutex_unlock(&sp->so_delegreturn_mutex); 7061 if (status != 0) 7062 goto out; 7063 /* Is this a delegated lock? */ 7064 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 7065 goto out; 7066 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 7067 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 7068 status = -ENOMEM; 7069 if (IS_ERR(seqid)) 7070 goto out; 7071 task = nfs4_do_unlck(request, 7072 nfs_file_open_context(request->c.flc_file), 7073 lsp, seqid); 7074 status = PTR_ERR(task); 7075 if (IS_ERR(task)) 7076 goto out; 7077 status = rpc_wait_for_completion_task(task); 7078 rpc_put_task(task); 7079out: 7080 request->c.flc_flags = saved_flags; 7081 trace_nfs4_unlock(request, state, F_SETLK, status); 7082 return status; 7083} 7084 7085struct nfs4_lockdata { 7086 struct nfs_lock_args arg; 7087 struct nfs_lock_res res; 7088 struct nfs4_lock_state *lsp; 7089 struct nfs_open_context *ctx; 7090 struct file_lock fl; 7091 unsigned long timestamp; 7092 int rpc_status; 7093 int cancelled; 7094 struct nfs_server *server; 7095}; 7096 7097static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 7098 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 7099 gfp_t gfp_mask) 7100{ 7101 struct nfs4_lockdata *p; 7102 struct inode *inode = lsp->ls_state->inode; 7103 struct nfs_server *server = NFS_SERVER(inode); 7104 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 7105 7106 p = kzalloc(sizeof(*p), gfp_mask); 7107 if (p == NULL) 7108 return NULL; 7109 7110 p->arg.fh = NFS_FH(inode); 7111 p->arg.fl = &p->fl; 7112 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 7113 if (IS_ERR(p->arg.open_seqid)) 7114 goto out_free; 7115 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 7116 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 7117 if (IS_ERR(p->arg.lock_seqid)) 7118 goto out_free_seqid; 7119 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 7120 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 7121 p->arg.lock_owner.s_dev = server->s_dev; 7122 p->res.lock_seqid = p->arg.lock_seqid; 7123 p->lsp = lsp; 7124 p->server = server; 7125 p->ctx = get_nfs_open_context(ctx); 7126 locks_init_lock(&p->fl); 7127 locks_copy_lock(&p->fl, fl); 7128 return p; 7129out_free_seqid: 7130 nfs_free_seqid(p->arg.open_seqid); 7131out_free: 7132 kfree(p); 7133 return NULL; 7134} 7135 7136static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 7137{ 7138 struct nfs4_lockdata *data = calldata; 7139 struct nfs4_state *state = data->lsp->ls_state; 7140 7141 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 7142 goto out_wait; 7143 /* Do we need to do an open_to_lock_owner? */ 7144 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 7145 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 7146 goto out_release_lock_seqid; 7147 } 7148 nfs4_stateid_copy(&data->arg.open_stateid, 7149 &state->open_stateid); 7150 data->arg.new_lock_owner = 1; 7151 data->res.open_seqid = data->arg.open_seqid; 7152 } else { 7153 data->arg.new_lock_owner = 0; 7154 nfs4_stateid_copy(&data->arg.lock_stateid, 7155 &data->lsp->ls_stateid); 7156 } 7157 if (!nfs4_valid_open_stateid(state)) { 7158 data->rpc_status = -EBADF; 7159 task->tk_action = NULL; 7160 goto out_release_open_seqid; 7161 } 7162 data->timestamp = jiffies; 7163 if (nfs4_setup_sequence(data->server->nfs_client, 7164 &data->arg.seq_args, 7165 &data->res.seq_res, 7166 task) == 0) 7167 return; 7168out_release_open_seqid: 7169 nfs_release_seqid(data->arg.open_seqid); 7170out_release_lock_seqid: 7171 nfs_release_seqid(data->arg.lock_seqid); 7172out_wait: 7173 nfs4_sequence_done(task, &data->res.seq_res); 7174 dprintk("%s: ret = %d\n", __func__, data->rpc_status); 7175} 7176 7177static void nfs4_lock_done(struct rpc_task *task, void *calldata) 7178{ 7179 struct nfs4_lockdata *data = calldata; 7180 struct nfs4_lock_state *lsp = data->lsp; 7181 7182 if (!nfs4_sequence_done(task, &data->res.seq_res)) 7183 return; 7184 7185 data->rpc_status = task->tk_status; 7186 switch (task->tk_status) { 7187 case 0: 7188 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 7189 data->timestamp); 7190 if (data->arg.new_lock && !data->cancelled) { 7191 data->fl.c.flc_flags &= ~(FL_SLEEP | FL_ACCESS); 7192 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) 7193 goto out_restart; 7194 } 7195 if (data->arg.new_lock_owner != 0) { 7196 nfs_confirm_seqid(&lsp->ls_seqid, 0); 7197 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 7198 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 7199 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 7200 goto out_restart; 7201 break; 7202 case -NFS4ERR_OLD_STATEID: 7203 if (data->arg.new_lock_owner != 0 && 7204 nfs4_refresh_open_old_stateid(&data->arg.open_stateid, 7205 lsp->ls_state)) 7206 goto out_restart; 7207 if (nfs4_refresh_lock_old_stateid(&data->arg.lock_stateid, lsp)) 7208 goto out_restart; 7209 fallthrough; 7210 case -NFS4ERR_BAD_STATEID: 7211 case -NFS4ERR_STALE_STATEID: 7212 case -NFS4ERR_EXPIRED: 7213 if (data->arg.new_lock_owner != 0) { 7214 if (!nfs4_stateid_match(&data->arg.open_stateid, 7215 &lsp->ls_state->open_stateid)) 7216 goto out_restart; 7217 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 7218 &lsp->ls_stateid)) 7219 goto out_restart; 7220 } 7221out_done: 7222 dprintk("%s: ret = %d!\n", __func__, data->rpc_status); 7223 return; 7224out_restart: 7225 if (!data->cancelled) 7226 rpc_restart_call_prepare(task); 7227 goto out_done; 7228} 7229 7230static void nfs4_lock_release(void *calldata) 7231{ 7232 struct nfs4_lockdata *data = calldata; 7233 7234 nfs_free_seqid(data->arg.open_seqid); 7235 if (data->cancelled && data->rpc_status == 0) { 7236 struct rpc_task *task; 7237 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 7238 data->arg.lock_seqid); 7239 if (!IS_ERR(task)) 7240 rpc_put_task_async(task); 7241 dprintk("%s: cancelling lock!\n", __func__); 7242 } else 7243 nfs_free_seqid(data->arg.lock_seqid); 7244 nfs4_put_lock_state(data->lsp); 7245 put_nfs_open_context(data->ctx); 7246 kfree(data); 7247} 7248 7249static const struct rpc_call_ops nfs4_lock_ops = { 7250 .rpc_call_prepare = nfs4_lock_prepare, 7251 .rpc_call_done = nfs4_lock_done, 7252 .rpc_release = nfs4_lock_release, 7253}; 7254 7255static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 7256{ 7257 switch (error) { 7258 case -NFS4ERR_ADMIN_REVOKED: 7259 case -NFS4ERR_EXPIRED: 7260 case -NFS4ERR_BAD_STATEID: 7261 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7262 if (new_lock_owner != 0 || 7263 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 7264 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 7265 break; 7266 case -NFS4ERR_STALE_STATEID: 7267 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 7268 nfs4_schedule_lease_recovery(server->nfs_client); 7269 } 7270} 7271 7272static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 7273{ 7274 struct nfs4_lockdata *data; 7275 struct rpc_task *task; 7276 struct rpc_message msg = { 7277 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 7278 .rpc_cred = state->owner->so_cred, 7279 }; 7280 struct rpc_task_setup task_setup_data = { 7281 .rpc_client = NFS_CLIENT(state->inode), 7282 .rpc_message = &msg, 7283 .callback_ops = &nfs4_lock_ops, 7284 .workqueue = nfsiod_workqueue, 7285 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF, 7286 }; 7287 int ret; 7288 7289 if (nfs_server_capable(state->inode, NFS_CAP_MOVEABLE)) 7290 task_setup_data.flags |= RPC_TASK_MOVEABLE; 7291 7292 data = nfs4_alloc_lockdata(fl, 7293 nfs_file_open_context(fl->c.flc_file), 7294 fl->fl_u.nfs4_fl.owner, GFP_KERNEL); 7295 if (data == NULL) 7296 return -ENOMEM; 7297 if (IS_SETLKW(cmd)) 7298 data->arg.block = 1; 7299 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1, 7300 recovery_type > NFS_LOCK_NEW); 7301 msg.rpc_argp = &data->arg; 7302 msg.rpc_resp = &data->res; 7303 task_setup_data.callback_data = data; 7304 if (recovery_type > NFS_LOCK_NEW) { 7305 if (recovery_type == NFS_LOCK_RECLAIM) 7306 data->arg.reclaim = NFS_LOCK_RECLAIM; 7307 } else 7308 data->arg.new_lock = 1; 7309 task = rpc_run_task(&task_setup_data); 7310 if (IS_ERR(task)) 7311 return PTR_ERR(task); 7312 ret = rpc_wait_for_completion_task(task); 7313 if (ret == 0) { 7314 ret = data->rpc_status; 7315 if (ret) 7316 nfs4_handle_setlk_error(data->server, data->lsp, 7317 data->arg.new_lock_owner, ret); 7318 } else 7319 data->cancelled = true; 7320 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 7321 rpc_put_task(task); 7322 dprintk("%s: ret = %d\n", __func__, ret); 7323 return ret; 7324} 7325 7326static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 7327{ 7328 struct nfs_server *server = NFS_SERVER(state->inode); 7329 struct nfs4_exception exception = { 7330 .inode = state->inode, 7331 }; 7332 int err; 7333 7334 do { 7335 /* Cache the lock if possible... */ 7336 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7337 return 0; 7338 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 7339 if (err != -NFS4ERR_DELAY) 7340 break; 7341 nfs4_handle_exception(server, err, &exception); 7342 } while (exception.retry); 7343 return err; 7344} 7345 7346static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 7347{ 7348 struct nfs_server *server = NFS_SERVER(state->inode); 7349 struct nfs4_exception exception = { 7350 .inode = state->inode, 7351 }; 7352 int err; 7353 7354 err = nfs4_set_lock_state(state, request); 7355 if (err != 0) 7356 return err; 7357 if (!recover_lost_locks) { 7358 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 7359 return 0; 7360 } 7361 do { 7362 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 7363 return 0; 7364 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 7365 switch (err) { 7366 default: 7367 goto out; 7368 case -NFS4ERR_GRACE: 7369 case -NFS4ERR_DELAY: 7370 nfs4_handle_exception(server, err, &exception); 7371 err = 0; 7372 } 7373 } while (exception.retry); 7374out: 7375 return err; 7376} 7377 7378#if defined(CONFIG_NFS_V4_1) 7379static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 7380{ 7381 struct nfs4_lock_state *lsp; 7382 int status; 7383 7384 status = nfs4_set_lock_state(state, request); 7385 if (status != 0) 7386 return status; 7387 lsp = request->fl_u.nfs4_fl.owner; 7388 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 7389 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 7390 return 0; 7391 return nfs4_lock_expired(state, request); 7392} 7393#endif 7394 7395static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7396{ 7397 struct nfs_inode *nfsi = NFS_I(state->inode); 7398 struct nfs4_state_owner *sp = state->owner; 7399 unsigned char flags = request->c.flc_flags; 7400 int status; 7401 7402 request->c.flc_flags |= FL_ACCESS; 7403 status = locks_lock_inode_wait(state->inode, request); 7404 if (status < 0) 7405 goto out; 7406 mutex_lock(&sp->so_delegreturn_mutex); 7407 down_read(&nfsi->rwsem); 7408 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 7409 /* Yes: cache locks! */ 7410 /* ...but avoid races with delegation recall... */ 7411 request->c.flc_flags = flags & ~FL_SLEEP; 7412 status = locks_lock_inode_wait(state->inode, request); 7413 up_read(&nfsi->rwsem); 7414 mutex_unlock(&sp->so_delegreturn_mutex); 7415 goto out; 7416 } 7417 up_read(&nfsi->rwsem); 7418 mutex_unlock(&sp->so_delegreturn_mutex); 7419 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 7420out: 7421 request->c.flc_flags = flags; 7422 return status; 7423} 7424 7425static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7426{ 7427 struct nfs4_exception exception = { 7428 .state = state, 7429 .inode = state->inode, 7430 .interruptible = true, 7431 }; 7432 int err; 7433 7434 do { 7435 err = _nfs4_proc_setlk(state, cmd, request); 7436 if (err == -NFS4ERR_DENIED) 7437 err = -EAGAIN; 7438 err = nfs4_handle_exception(NFS_SERVER(state->inode), 7439 err, &exception); 7440 } while (exception.retry); 7441 return err; 7442} 7443 7444#define NFS4_LOCK_MINTIMEOUT (1 * HZ) 7445#define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 7446 7447static int 7448nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 7449 struct file_lock *request) 7450{ 7451 int status = -ERESTARTSYS; 7452 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 7453 7454 while(!signalled()) { 7455 status = nfs4_proc_setlk(state, cmd, request); 7456 if ((status != -EAGAIN) || IS_SETLK(cmd)) 7457 break; 7458 __set_current_state(TASK_INTERRUPTIBLE|TASK_FREEZABLE); 7459 schedule_timeout(timeout); 7460 timeout *= 2; 7461 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 7462 status = -ERESTARTSYS; 7463 } 7464 return status; 7465} 7466 7467#ifdef CONFIG_NFS_V4_1 7468struct nfs4_lock_waiter { 7469 struct inode *inode; 7470 struct nfs_lowner owner; 7471 wait_queue_entry_t wait; 7472}; 7473 7474static int 7475nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 7476{ 7477 struct nfs4_lock_waiter *waiter = 7478 container_of(wait, struct nfs4_lock_waiter, wait); 7479 7480 /* NULL key means to wake up everyone */ 7481 if (key) { 7482 struct cb_notify_lock_args *cbnl = key; 7483 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 7484 *wowner = &waiter->owner; 7485 7486 /* Only wake if the callback was for the same owner. */ 7487 if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev) 7488 return 0; 7489 7490 /* Make sure it's for the right inode */ 7491 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 7492 return 0; 7493 } 7494 7495 return woken_wake_function(wait, mode, flags, key); 7496} 7497 7498static int 7499nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7500{ 7501 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 7502 struct nfs_server *server = NFS_SERVER(state->inode); 7503 struct nfs_client *clp = server->nfs_client; 7504 wait_queue_head_t *q = &clp->cl_lock_waitq; 7505 struct nfs4_lock_waiter waiter = { 7506 .inode = state->inode, 7507 .owner = { .clientid = clp->cl_clientid, 7508 .id = lsp->ls_seqid.owner_id, 7509 .s_dev = server->s_dev }, 7510 }; 7511 int status; 7512 7513 /* Don't bother with waitqueue if we don't expect a callback */ 7514 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 7515 return nfs4_retry_setlk_simple(state, cmd, request); 7516 7517 init_wait(&waiter.wait); 7518 waiter.wait.func = nfs4_wake_lock_waiter; 7519 add_wait_queue(q, &waiter.wait); 7520 7521 do { 7522 status = nfs4_proc_setlk(state, cmd, request); 7523 if (status != -EAGAIN || IS_SETLK(cmd)) 7524 break; 7525 7526 status = -ERESTARTSYS; 7527 wait_woken(&waiter.wait, TASK_INTERRUPTIBLE|TASK_FREEZABLE, 7528 NFS4_LOCK_MAXTIMEOUT); 7529 } while (!signalled()); 7530 7531 remove_wait_queue(q, &waiter.wait); 7532 7533 return status; 7534} 7535#else /* !CONFIG_NFS_V4_1 */ 7536static inline int 7537nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 7538{ 7539 return nfs4_retry_setlk_simple(state, cmd, request); 7540} 7541#endif 7542 7543static int 7544nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 7545{ 7546 struct nfs_open_context *ctx; 7547 struct nfs4_state *state; 7548 int status; 7549 7550 /* verify open state */ 7551 ctx = nfs_file_open_context(filp); 7552 state = ctx->state; 7553 7554 if (IS_GETLK(cmd)) { 7555 if (state != NULL) 7556 return nfs4_proc_getlk(state, F_GETLK, request); 7557 return 0; 7558 } 7559 7560 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 7561 return -EINVAL; 7562 7563 if (lock_is_unlock(request)) { 7564 if (state != NULL) 7565 return nfs4_proc_unlck(state, cmd, request); 7566 return 0; 7567 } 7568 7569 if (state == NULL) 7570 return -ENOLCK; 7571 7572 if ((request->c.flc_flags & FL_POSIX) && 7573 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 7574 return -ENOLCK; 7575 7576 /* 7577 * Don't rely on the VFS having checked the file open mode, 7578 * since it won't do this for flock() locks. 7579 */ 7580 switch (request->c.flc_type) { 7581 case F_RDLCK: 7582 if (!(filp->f_mode & FMODE_READ)) 7583 return -EBADF; 7584 break; 7585 case F_WRLCK: 7586 if (!(filp->f_mode & FMODE_WRITE)) 7587 return -EBADF; 7588 } 7589 7590 status = nfs4_set_lock_state(state, request); 7591 if (status != 0) 7592 return status; 7593 7594 return nfs4_retry_setlk(state, cmd, request); 7595} 7596 7597static int nfs4_delete_lease(struct file *file, void **priv) 7598{ 7599 return generic_setlease(file, F_UNLCK, NULL, priv); 7600} 7601 7602static int nfs4_add_lease(struct file *file, int arg, struct file_lease **lease, 7603 void **priv) 7604{ 7605 struct inode *inode = file_inode(file); 7606 fmode_t type = arg == F_RDLCK ? FMODE_READ : FMODE_WRITE; 7607 int ret; 7608 7609 /* No delegation, no lease */ 7610 if (!nfs4_have_delegation(inode, type)) 7611 return -EAGAIN; 7612 ret = generic_setlease(file, arg, lease, priv); 7613 if (ret || nfs4_have_delegation(inode, type)) 7614 return ret; 7615 /* We raced with a delegation return */ 7616 nfs4_delete_lease(file, priv); 7617 return -EAGAIN; 7618} 7619 7620int nfs4_proc_setlease(struct file *file, int arg, struct file_lease **lease, 7621 void **priv) 7622{ 7623 switch (arg) { 7624 case F_RDLCK: 7625 case F_WRLCK: 7626 return nfs4_add_lease(file, arg, lease, priv); 7627 case F_UNLCK: 7628 return nfs4_delete_lease(file, priv); 7629 default: 7630 return -EINVAL; 7631 } 7632} 7633 7634int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 7635{ 7636 struct nfs_server *server = NFS_SERVER(state->inode); 7637 int err; 7638 7639 err = nfs4_set_lock_state(state, fl); 7640 if (err != 0) 7641 return err; 7642 do { 7643 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 7644 if (err != -NFS4ERR_DELAY) 7645 break; 7646 ssleep(1); 7647 } while (err == -NFS4ERR_DELAY); 7648 return nfs4_handle_delegation_recall_error(server, state, stateid, fl, err); 7649} 7650 7651struct nfs_release_lockowner_data { 7652 struct nfs4_lock_state *lsp; 7653 struct nfs_server *server; 7654 struct nfs_release_lockowner_args args; 7655 struct nfs_release_lockowner_res res; 7656 unsigned long timestamp; 7657}; 7658 7659static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 7660{ 7661 struct nfs_release_lockowner_data *data = calldata; 7662 struct nfs_server *server = data->server; 7663 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 7664 &data->res.seq_res, task); 7665 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7666 data->timestamp = jiffies; 7667} 7668 7669static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 7670{ 7671 struct nfs_release_lockowner_data *data = calldata; 7672 struct nfs_server *server = data->server; 7673 7674 nfs40_sequence_done(task, &data->res.seq_res); 7675 7676 switch (task->tk_status) { 7677 case 0: 7678 renew_lease(server, data->timestamp); 7679 break; 7680 case -NFS4ERR_STALE_CLIENTID: 7681 case -NFS4ERR_EXPIRED: 7682 nfs4_schedule_lease_recovery(server->nfs_client); 7683 break; 7684 case -NFS4ERR_LEASE_MOVED: 7685 case -NFS4ERR_DELAY: 7686 if (nfs4_async_handle_error(task, server, 7687 NULL, NULL) == -EAGAIN) 7688 rpc_restart_call_prepare(task); 7689 } 7690} 7691 7692static void nfs4_release_lockowner_release(void *calldata) 7693{ 7694 struct nfs_release_lockowner_data *data = calldata; 7695 nfs4_free_lock_state(data->server, data->lsp); 7696 kfree(calldata); 7697} 7698 7699static const struct rpc_call_ops nfs4_release_lockowner_ops = { 7700 .rpc_call_prepare = nfs4_release_lockowner_prepare, 7701 .rpc_call_done = nfs4_release_lockowner_done, 7702 .rpc_release = nfs4_release_lockowner_release, 7703}; 7704 7705static void 7706nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 7707{ 7708 struct nfs_release_lockowner_data *data; 7709 struct rpc_message msg = { 7710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 7711 }; 7712 7713 if (server->nfs_client->cl_mvops->minor_version != 0) 7714 return; 7715 7716 data = kmalloc(sizeof(*data), GFP_KERNEL); 7717 if (!data) 7718 return; 7719 data->lsp = lsp; 7720 data->server = server; 7721 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 7722 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 7723 data->args.lock_owner.s_dev = server->s_dev; 7724 7725 msg.rpc_argp = &data->args; 7726 msg.rpc_resp = &data->res; 7727 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0); 7728 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 7729} 7730 7731#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 7732 7733static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 7734 struct mnt_idmap *idmap, 7735 struct dentry *unused, struct inode *inode, 7736 const char *key, const void *buf, 7737 size_t buflen, int flags) 7738{ 7739 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_ACL); 7740} 7741 7742static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 7743 struct dentry *unused, struct inode *inode, 7744 const char *key, void *buf, size_t buflen) 7745{ 7746 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_ACL); 7747} 7748 7749static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 7750{ 7751 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_ACL); 7752} 7753 7754#if defined(CONFIG_NFS_V4_1) 7755#define XATTR_NAME_NFSV4_DACL "system.nfs4_dacl" 7756 7757static int nfs4_xattr_set_nfs4_dacl(const struct xattr_handler *handler, 7758 struct mnt_idmap *idmap, 7759 struct dentry *unused, struct inode *inode, 7760 const char *key, const void *buf, 7761 size_t buflen, int flags) 7762{ 7763 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_DACL); 7764} 7765 7766static int nfs4_xattr_get_nfs4_dacl(const struct xattr_handler *handler, 7767 struct dentry *unused, struct inode *inode, 7768 const char *key, void *buf, size_t buflen) 7769{ 7770 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_DACL); 7771} 7772 7773static bool nfs4_xattr_list_nfs4_dacl(struct dentry *dentry) 7774{ 7775 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_DACL); 7776} 7777 7778#define XATTR_NAME_NFSV4_SACL "system.nfs4_sacl" 7779 7780static int nfs4_xattr_set_nfs4_sacl(const struct xattr_handler *handler, 7781 struct mnt_idmap *idmap, 7782 struct dentry *unused, struct inode *inode, 7783 const char *key, const void *buf, 7784 size_t buflen, int flags) 7785{ 7786 return nfs4_proc_set_acl(inode, buf, buflen, NFS4ACL_SACL); 7787} 7788 7789static int nfs4_xattr_get_nfs4_sacl(const struct xattr_handler *handler, 7790 struct dentry *unused, struct inode *inode, 7791 const char *key, void *buf, size_t buflen) 7792{ 7793 return nfs4_proc_get_acl(inode, buf, buflen, NFS4ACL_SACL); 7794} 7795 7796static bool nfs4_xattr_list_nfs4_sacl(struct dentry *dentry) 7797{ 7798 return nfs4_server_supports_acls(NFS_SB(dentry->d_sb), NFS4ACL_SACL); 7799} 7800 7801#endif 7802 7803#ifdef CONFIG_NFS_V4_SECURITY_LABEL 7804 7805static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 7806 struct mnt_idmap *idmap, 7807 struct dentry *unused, struct inode *inode, 7808 const char *key, const void *buf, 7809 size_t buflen, int flags) 7810{ 7811 if (security_ismaclabel(key)) 7812 return nfs4_set_security_label(inode, buf, buflen); 7813 7814 return -EOPNOTSUPP; 7815} 7816 7817static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 7818 struct dentry *unused, struct inode *inode, 7819 const char *key, void *buf, size_t buflen) 7820{ 7821 if (security_ismaclabel(key)) 7822 return nfs4_get_security_label(inode, buf, buflen); 7823 return -EOPNOTSUPP; 7824} 7825 7826static ssize_t 7827nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7828{ 7829 int len = 0; 7830 7831 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 7832 len = security_inode_listsecurity(inode, list, list_len); 7833 if (len >= 0 && list_len && len > list_len) 7834 return -ERANGE; 7835 } 7836 return len; 7837} 7838 7839static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 7840 .prefix = XATTR_SECURITY_PREFIX, 7841 .get = nfs4_xattr_get_nfs4_label, 7842 .set = nfs4_xattr_set_nfs4_label, 7843}; 7844 7845#else 7846 7847static ssize_t 7848nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 7849{ 7850 return 0; 7851} 7852 7853#endif 7854 7855#ifdef CONFIG_NFS_V4_2 7856static int nfs4_xattr_set_nfs4_user(const struct xattr_handler *handler, 7857 struct mnt_idmap *idmap, 7858 struct dentry *unused, struct inode *inode, 7859 const char *key, const void *buf, 7860 size_t buflen, int flags) 7861{ 7862 u32 mask; 7863 int ret; 7864 7865 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7866 return -EOPNOTSUPP; 7867 7868 /* 7869 * There is no mapping from the MAY_* flags to the NFS_ACCESS_XA* 7870 * flags right now. Handling of xattr operations use the normal 7871 * file read/write permissions. 7872 * 7873 * Just in case the server has other ideas (which RFC 8276 allows), 7874 * do a cached access check for the XA* flags to possibly avoid 7875 * doing an RPC and getting EACCES back. 7876 */ 7877 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7878 if (!(mask & NFS_ACCESS_XAWRITE)) 7879 return -EACCES; 7880 } 7881 7882 if (buf == NULL) { 7883 ret = nfs42_proc_removexattr(inode, key); 7884 if (!ret) 7885 nfs4_xattr_cache_remove(inode, key); 7886 } else { 7887 ret = nfs42_proc_setxattr(inode, key, buf, buflen, flags); 7888 if (!ret) 7889 nfs4_xattr_cache_add(inode, key, buf, NULL, buflen); 7890 } 7891 7892 return ret; 7893} 7894 7895static int nfs4_xattr_get_nfs4_user(const struct xattr_handler *handler, 7896 struct dentry *unused, struct inode *inode, 7897 const char *key, void *buf, size_t buflen) 7898{ 7899 u32 mask; 7900 ssize_t ret; 7901 7902 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7903 return -EOPNOTSUPP; 7904 7905 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7906 if (!(mask & NFS_ACCESS_XAREAD)) 7907 return -EACCES; 7908 } 7909 7910 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7911 if (ret) 7912 return ret; 7913 7914 ret = nfs4_xattr_cache_get(inode, key, buf, buflen); 7915 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7916 return ret; 7917 7918 ret = nfs42_proc_getxattr(inode, key, buf, buflen); 7919 7920 return ret; 7921} 7922 7923static ssize_t 7924nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7925{ 7926 u64 cookie; 7927 bool eof; 7928 ssize_t ret, size; 7929 char *buf; 7930 size_t buflen; 7931 u32 mask; 7932 7933 if (!nfs_server_capable(inode, NFS_CAP_XATTR)) 7934 return 0; 7935 7936 if (!nfs_access_get_cached(inode, current_cred(), &mask, true)) { 7937 if (!(mask & NFS_ACCESS_XALIST)) 7938 return 0; 7939 } 7940 7941 ret = nfs_revalidate_inode(inode, NFS_INO_INVALID_CHANGE); 7942 if (ret) 7943 return ret; 7944 7945 ret = nfs4_xattr_cache_list(inode, list, list_len); 7946 if (ret >= 0 || (ret < 0 && ret != -ENOENT)) 7947 return ret; 7948 7949 cookie = 0; 7950 eof = false; 7951 buflen = list_len ? list_len : XATTR_LIST_MAX; 7952 buf = list_len ? list : NULL; 7953 size = 0; 7954 7955 while (!eof) { 7956 ret = nfs42_proc_listxattrs(inode, buf, buflen, 7957 &cookie, &eof); 7958 if (ret < 0) 7959 return ret; 7960 7961 if (list_len) { 7962 buf += ret; 7963 buflen -= ret; 7964 } 7965 size += ret; 7966 } 7967 7968 if (list_len) 7969 nfs4_xattr_cache_set_list(inode, list, size); 7970 7971 return size; 7972} 7973 7974#else 7975 7976static ssize_t 7977nfs4_listxattr_nfs4_user(struct inode *inode, char *list, size_t list_len) 7978{ 7979 return 0; 7980} 7981#endif /* CONFIG_NFS_V4_2 */ 7982 7983/* 7984 * nfs_fhget will use either the mounted_on_fileid or the fileid 7985 */ 7986static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 7987{ 7988 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 7989 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 7990 (fattr->valid & NFS_ATTR_FATTR_FSID) && 7991 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 7992 return; 7993 7994 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 7995 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 7996 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 7997 fattr->nlink = 2; 7998} 7999 8000static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 8001 const struct qstr *name, 8002 struct nfs4_fs_locations *fs_locations, 8003 struct page *page) 8004{ 8005 struct nfs_server *server = NFS_SERVER(dir); 8006 u32 bitmask[3]; 8007 struct nfs4_fs_locations_arg args = { 8008 .dir_fh = NFS_FH(dir), 8009 .name = name, 8010 .page = page, 8011 .bitmask = bitmask, 8012 }; 8013 struct nfs4_fs_locations_res res = { 8014 .fs_locations = fs_locations, 8015 }; 8016 struct rpc_message msg = { 8017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8018 .rpc_argp = &args, 8019 .rpc_resp = &res, 8020 }; 8021 int status; 8022 8023 dprintk("%s: start\n", __func__); 8024 8025 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS; 8026 bitmask[1] = nfs4_fattr_bitmap[1]; 8027 8028 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 8029 * is not supported */ 8030 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 8031 bitmask[0] &= ~FATTR4_WORD0_FILEID; 8032 else 8033 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID; 8034 8035 nfs_fattr_init(fs_locations->fattr); 8036 fs_locations->server = server; 8037 fs_locations->nlocations = 0; 8038 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 8039 dprintk("%s: returned status = %d\n", __func__, status); 8040 return status; 8041} 8042 8043int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 8044 const struct qstr *name, 8045 struct nfs4_fs_locations *fs_locations, 8046 struct page *page) 8047{ 8048 struct nfs4_exception exception = { 8049 .interruptible = true, 8050 }; 8051 int err; 8052 do { 8053 err = _nfs4_proc_fs_locations(client, dir, name, 8054 fs_locations, page); 8055 trace_nfs4_get_fs_locations(dir, name, err); 8056 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8057 &exception); 8058 } while (exception.retry); 8059 return err; 8060} 8061 8062/* 8063 * This operation also signals the server that this client is 8064 * performing migration recovery. The server can stop returning 8065 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 8066 * appended to this compound to identify the client ID which is 8067 * performing recovery. 8068 */ 8069static int _nfs40_proc_get_locations(struct nfs_server *server, 8070 struct nfs_fh *fhandle, 8071 struct nfs4_fs_locations *locations, 8072 struct page *page, const struct cred *cred) 8073{ 8074 struct rpc_clnt *clnt = server->client; 8075 u32 bitmask[2] = { 8076 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 8077 }; 8078 struct nfs4_fs_locations_arg args = { 8079 .clientid = server->nfs_client->cl_clientid, 8080 .fh = fhandle, 8081 .page = page, 8082 .bitmask = bitmask, 8083 .migration = 1, /* skip LOOKUP */ 8084 .renew = 1, /* append RENEW */ 8085 }; 8086 struct nfs4_fs_locations_res res = { 8087 .fs_locations = locations, 8088 .migration = 1, 8089 .renew = 1, 8090 }; 8091 struct rpc_message msg = { 8092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8093 .rpc_argp = &args, 8094 .rpc_resp = &res, 8095 .rpc_cred = cred, 8096 }; 8097 unsigned long now = jiffies; 8098 int status; 8099 8100 nfs_fattr_init(locations->fattr); 8101 locations->server = server; 8102 locations->nlocations = 0; 8103 8104 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8105 status = nfs4_call_sync_sequence(clnt, server, &msg, 8106 &args.seq_args, &res.seq_res); 8107 if (status) 8108 return status; 8109 8110 renew_lease(server, now); 8111 return 0; 8112} 8113 8114#ifdef CONFIG_NFS_V4_1 8115 8116/* 8117 * This operation also signals the server that this client is 8118 * performing migration recovery. The server can stop asserting 8119 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 8120 * performing this operation is identified in the SEQUENCE 8121 * operation in this compound. 8122 * 8123 * When the client supports GETATTR(fs_locations_info), it can 8124 * be plumbed in here. 8125 */ 8126static int _nfs41_proc_get_locations(struct nfs_server *server, 8127 struct nfs_fh *fhandle, 8128 struct nfs4_fs_locations *locations, 8129 struct page *page, const struct cred *cred) 8130{ 8131 struct rpc_clnt *clnt = server->client; 8132 u32 bitmask[2] = { 8133 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 8134 }; 8135 struct nfs4_fs_locations_arg args = { 8136 .fh = fhandle, 8137 .page = page, 8138 .bitmask = bitmask, 8139 .migration = 1, /* skip LOOKUP */ 8140 }; 8141 struct nfs4_fs_locations_res res = { 8142 .fs_locations = locations, 8143 .migration = 1, 8144 }; 8145 struct rpc_message msg = { 8146 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 8147 .rpc_argp = &args, 8148 .rpc_resp = &res, 8149 .rpc_cred = cred, 8150 }; 8151 struct nfs4_call_sync_data data = { 8152 .seq_server = server, 8153 .seq_args = &args.seq_args, 8154 .seq_res = &res.seq_res, 8155 }; 8156 struct rpc_task_setup task_setup_data = { 8157 .rpc_client = clnt, 8158 .rpc_message = &msg, 8159 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 8160 .callback_data = &data, 8161 .flags = RPC_TASK_NO_ROUND_ROBIN, 8162 }; 8163 int status; 8164 8165 nfs_fattr_init(locations->fattr); 8166 locations->server = server; 8167 locations->nlocations = 0; 8168 8169 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8170 status = nfs4_call_sync_custom(&task_setup_data); 8171 if (status == NFS4_OK && 8172 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8173 status = -NFS4ERR_LEASE_MOVED; 8174 return status; 8175} 8176 8177#endif /* CONFIG_NFS_V4_1 */ 8178 8179/** 8180 * nfs4_proc_get_locations - discover locations for a migrated FSID 8181 * @server: pointer to nfs_server to process 8182 * @fhandle: pointer to the kernel NFS client file handle 8183 * @locations: result of query 8184 * @page: buffer 8185 * @cred: credential to use for this operation 8186 * 8187 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 8188 * operation failed, or a negative errno if a local error occurred. 8189 * 8190 * On success, "locations" is filled in, but if the server has 8191 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 8192 * asserted. 8193 * 8194 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 8195 * from this client that require migration recovery. 8196 */ 8197int nfs4_proc_get_locations(struct nfs_server *server, 8198 struct nfs_fh *fhandle, 8199 struct nfs4_fs_locations *locations, 8200 struct page *page, const struct cred *cred) 8201{ 8202 struct nfs_client *clp = server->nfs_client; 8203 const struct nfs4_mig_recovery_ops *ops = 8204 clp->cl_mvops->mig_recovery_ops; 8205 struct nfs4_exception exception = { 8206 .interruptible = true, 8207 }; 8208 int status; 8209 8210 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8211 (unsigned long long)server->fsid.major, 8212 (unsigned long long)server->fsid.minor, 8213 clp->cl_hostname); 8214 nfs_display_fhandle(fhandle, __func__); 8215 8216 do { 8217 status = ops->get_locations(server, fhandle, locations, page, 8218 cred); 8219 if (status != -NFS4ERR_DELAY) 8220 break; 8221 nfs4_handle_exception(server, status, &exception); 8222 } while (exception.retry); 8223 return status; 8224} 8225 8226/* 8227 * This operation also signals the server that this client is 8228 * performing "lease moved" recovery. The server can stop 8229 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 8230 * is appended to this compound to identify the client ID which is 8231 * performing recovery. 8232 */ 8233static int _nfs40_proc_fsid_present(struct inode *inode, const struct cred *cred) 8234{ 8235 struct nfs_server *server = NFS_SERVER(inode); 8236 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 8237 struct rpc_clnt *clnt = server->client; 8238 struct nfs4_fsid_present_arg args = { 8239 .fh = NFS_FH(inode), 8240 .clientid = clp->cl_clientid, 8241 .renew = 1, /* append RENEW */ 8242 }; 8243 struct nfs4_fsid_present_res res = { 8244 .renew = 1, 8245 }; 8246 struct rpc_message msg = { 8247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8248 .rpc_argp = &args, 8249 .rpc_resp = &res, 8250 .rpc_cred = cred, 8251 }; 8252 unsigned long now = jiffies; 8253 int status; 8254 8255 res.fh = nfs_alloc_fhandle(); 8256 if (res.fh == NULL) 8257 return -ENOMEM; 8258 8259 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8260 status = nfs4_call_sync_sequence(clnt, server, &msg, 8261 &args.seq_args, &res.seq_res); 8262 nfs_free_fhandle(res.fh); 8263 if (status) 8264 return status; 8265 8266 do_renew_lease(clp, now); 8267 return 0; 8268} 8269 8270#ifdef CONFIG_NFS_V4_1 8271 8272/* 8273 * This operation also signals the server that this client is 8274 * performing "lease moved" recovery. The server can stop asserting 8275 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 8276 * this operation is identified in the SEQUENCE operation in this 8277 * compound. 8278 */ 8279static int _nfs41_proc_fsid_present(struct inode *inode, const struct cred *cred) 8280{ 8281 struct nfs_server *server = NFS_SERVER(inode); 8282 struct rpc_clnt *clnt = server->client; 8283 struct nfs4_fsid_present_arg args = { 8284 .fh = NFS_FH(inode), 8285 }; 8286 struct nfs4_fsid_present_res res = { 8287 }; 8288 struct rpc_message msg = { 8289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 8290 .rpc_argp = &args, 8291 .rpc_resp = &res, 8292 .rpc_cred = cred, 8293 }; 8294 int status; 8295 8296 res.fh = nfs_alloc_fhandle(); 8297 if (res.fh == NULL) 8298 return -ENOMEM; 8299 8300 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 8301 status = nfs4_call_sync_sequence(clnt, server, &msg, 8302 &args.seq_args, &res.seq_res); 8303 nfs_free_fhandle(res.fh); 8304 if (status == NFS4_OK && 8305 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 8306 status = -NFS4ERR_LEASE_MOVED; 8307 return status; 8308} 8309 8310#endif /* CONFIG_NFS_V4_1 */ 8311 8312/** 8313 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 8314 * @inode: inode on FSID to check 8315 * @cred: credential to use for this operation 8316 * 8317 * Server indicates whether the FSID is present, moved, or not 8318 * recognized. This operation is necessary to clear a LEASE_MOVED 8319 * condition for this client ID. 8320 * 8321 * Returns NFS4_OK if the FSID is present on this server, 8322 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 8323 * NFS4ERR code if some error occurred on the server, or a 8324 * negative errno if a local failure occurred. 8325 */ 8326int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred) 8327{ 8328 struct nfs_server *server = NFS_SERVER(inode); 8329 struct nfs_client *clp = server->nfs_client; 8330 const struct nfs4_mig_recovery_ops *ops = 8331 clp->cl_mvops->mig_recovery_ops; 8332 struct nfs4_exception exception = { 8333 .interruptible = true, 8334 }; 8335 int status; 8336 8337 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 8338 (unsigned long long)server->fsid.major, 8339 (unsigned long long)server->fsid.minor, 8340 clp->cl_hostname); 8341 nfs_display_fhandle(NFS_FH(inode), __func__); 8342 8343 do { 8344 status = ops->fsid_present(inode, cred); 8345 if (status != -NFS4ERR_DELAY) 8346 break; 8347 nfs4_handle_exception(server, status, &exception); 8348 } while (exception.retry); 8349 return status; 8350} 8351 8352/* 8353 * If 'use_integrity' is true and the state managment nfs_client 8354 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 8355 * and the machine credential as per RFC3530bis and RFC5661 Security 8356 * Considerations sections. Otherwise, just use the user cred with the 8357 * filesystem's rpc_client. 8358 */ 8359static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8360{ 8361 int status; 8362 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 8363 struct nfs_client *clp = NFS_SERVER(dir)->nfs_client; 8364 struct nfs4_secinfo_arg args = { 8365 .dir_fh = NFS_FH(dir), 8366 .name = name, 8367 }; 8368 struct nfs4_secinfo_res res = { 8369 .flavors = flavors, 8370 }; 8371 struct rpc_message msg = { 8372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 8373 .rpc_argp = &args, 8374 .rpc_resp = &res, 8375 }; 8376 struct nfs4_call_sync_data data = { 8377 .seq_server = NFS_SERVER(dir), 8378 .seq_args = &args.seq_args, 8379 .seq_res = &res.seq_res, 8380 }; 8381 struct rpc_task_setup task_setup = { 8382 .rpc_client = clnt, 8383 .rpc_message = &msg, 8384 .callback_ops = clp->cl_mvops->call_sync_ops, 8385 .callback_data = &data, 8386 .flags = RPC_TASK_NO_ROUND_ROBIN, 8387 }; 8388 const struct cred *cred = NULL; 8389 8390 if (use_integrity) { 8391 clnt = clp->cl_rpcclient; 8392 task_setup.rpc_client = clnt; 8393 8394 cred = nfs4_get_clid_cred(clp); 8395 msg.rpc_cred = cred; 8396 } 8397 8398 dprintk("NFS call secinfo %s\n", name->name); 8399 8400 nfs4_state_protect(clp, NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 8401 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 8402 status = nfs4_call_sync_custom(&task_setup); 8403 8404 dprintk("NFS reply secinfo: %d\n", status); 8405 8406 put_cred(cred); 8407 return status; 8408} 8409 8410int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 8411 struct nfs4_secinfo_flavors *flavors) 8412{ 8413 struct nfs4_exception exception = { 8414 .interruptible = true, 8415 }; 8416 int err; 8417 do { 8418 err = -NFS4ERR_WRONGSEC; 8419 8420 /* try to use integrity protection with machine cred */ 8421 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 8422 err = _nfs4_proc_secinfo(dir, name, flavors, true); 8423 8424 /* 8425 * if unable to use integrity protection, or SECINFO with 8426 * integrity protection returns NFS4ERR_WRONGSEC (which is 8427 * disallowed by spec, but exists in deployed servers) use 8428 * the current filesystem's rpc_client and the user cred. 8429 */ 8430 if (err == -NFS4ERR_WRONGSEC) 8431 err = _nfs4_proc_secinfo(dir, name, flavors, false); 8432 8433 trace_nfs4_secinfo(dir, name, err); 8434 err = nfs4_handle_exception(NFS_SERVER(dir), err, 8435 &exception); 8436 } while (exception.retry); 8437 return err; 8438} 8439 8440#ifdef CONFIG_NFS_V4_1 8441/* 8442 * Check the exchange flags returned by the server for invalid flags, having 8443 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 8444 * DS flags set. 8445 */ 8446static int nfs4_check_cl_exchange_flags(u32 flags, u32 version) 8447{ 8448 if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R)) 8449 goto out_inval; 8450 else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R)) 8451 goto out_inval; 8452 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 8453 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 8454 goto out_inval; 8455 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 8456 goto out_inval; 8457 return NFS_OK; 8458out_inval: 8459 return -NFS4ERR_INVAL; 8460} 8461 8462static bool 8463nfs41_same_server_scope(struct nfs41_server_scope *a, 8464 struct nfs41_server_scope *b) 8465{ 8466 if (a->server_scope_sz != b->server_scope_sz) 8467 return false; 8468 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 8469} 8470 8471static void 8472nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 8473{ 8474 struct nfs41_bind_conn_to_session_args *args = task->tk_msg.rpc_argp; 8475 struct nfs41_bind_conn_to_session_res *res = task->tk_msg.rpc_resp; 8476 struct nfs_client *clp = args->client; 8477 8478 switch (task->tk_status) { 8479 case -NFS4ERR_BADSESSION: 8480 case -NFS4ERR_DEADSESSION: 8481 nfs4_schedule_session_recovery(clp->cl_session, 8482 task->tk_status); 8483 return; 8484 } 8485 if (args->dir == NFS4_CDFC4_FORE_OR_BOTH && 8486 res->dir != NFS4_CDFS4_BOTH) { 8487 rpc_task_close_connection(task); 8488 if (args->retries++ < MAX_BIND_CONN_TO_SESSION_RETRIES) 8489 rpc_restart_call(task); 8490 } 8491} 8492 8493static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 8494 .rpc_call_done = nfs4_bind_one_conn_to_session_done, 8495}; 8496 8497/* 8498 * nfs4_proc_bind_one_conn_to_session() 8499 * 8500 * The 4.1 client currently uses the same TCP connection for the 8501 * fore and backchannel. 8502 */ 8503static 8504int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 8505 struct rpc_xprt *xprt, 8506 struct nfs_client *clp, 8507 const struct cred *cred) 8508{ 8509 int status; 8510 struct nfs41_bind_conn_to_session_args args = { 8511 .client = clp, 8512 .dir = NFS4_CDFC4_FORE_OR_BOTH, 8513 .retries = 0, 8514 }; 8515 struct nfs41_bind_conn_to_session_res res; 8516 struct rpc_message msg = { 8517 .rpc_proc = 8518 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 8519 .rpc_argp = &args, 8520 .rpc_resp = &res, 8521 .rpc_cred = cred, 8522 }; 8523 struct rpc_task_setup task_setup_data = { 8524 .rpc_client = clnt, 8525 .rpc_xprt = xprt, 8526 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 8527 .rpc_message = &msg, 8528 .flags = RPC_TASK_TIMEOUT, 8529 }; 8530 struct rpc_task *task; 8531 8532 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 8533 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 8534 args.dir = NFS4_CDFC4_FORE; 8535 8536 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 8537 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 8538 args.dir = NFS4_CDFC4_FORE; 8539 8540 task = rpc_run_task(&task_setup_data); 8541 if (!IS_ERR(task)) { 8542 status = task->tk_status; 8543 rpc_put_task(task); 8544 } else 8545 status = PTR_ERR(task); 8546 trace_nfs4_bind_conn_to_session(clp, status); 8547 if (status == 0) { 8548 if (memcmp(res.sessionid.data, 8549 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 8550 dprintk("NFS: %s: Session ID mismatch\n", __func__); 8551 return -EIO; 8552 } 8553 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 8554 dprintk("NFS: %s: Unexpected direction from server\n", 8555 __func__); 8556 return -EIO; 8557 } 8558 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 8559 dprintk("NFS: %s: Server returned RDMA mode = true\n", 8560 __func__); 8561 return -EIO; 8562 } 8563 } 8564 8565 return status; 8566} 8567 8568struct rpc_bind_conn_calldata { 8569 struct nfs_client *clp; 8570 const struct cred *cred; 8571}; 8572 8573static int 8574nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 8575 struct rpc_xprt *xprt, 8576 void *calldata) 8577{ 8578 struct rpc_bind_conn_calldata *p = calldata; 8579 8580 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 8581} 8582 8583int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, const struct cred *cred) 8584{ 8585 struct rpc_bind_conn_calldata data = { 8586 .clp = clp, 8587 .cred = cred, 8588 }; 8589 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 8590 nfs4_proc_bind_conn_to_session_callback, &data); 8591} 8592 8593/* 8594 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 8595 * and operations we'd like to see to enable certain features in the allow map 8596 */ 8597static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 8598 .how = SP4_MACH_CRED, 8599 .enforce.u.words = { 8600 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8601 1 << (OP_EXCHANGE_ID - 32) | 8602 1 << (OP_CREATE_SESSION - 32) | 8603 1 << (OP_DESTROY_SESSION - 32) | 8604 1 << (OP_DESTROY_CLIENTID - 32) 8605 }, 8606 .allow.u.words = { 8607 [0] = 1 << (OP_CLOSE) | 8608 1 << (OP_OPEN_DOWNGRADE) | 8609 1 << (OP_LOCKU) | 8610 1 << (OP_DELEGRETURN) | 8611 1 << (OP_COMMIT), 8612 [1] = 1 << (OP_SECINFO - 32) | 8613 1 << (OP_SECINFO_NO_NAME - 32) | 8614 1 << (OP_LAYOUTRETURN - 32) | 8615 1 << (OP_TEST_STATEID - 32) | 8616 1 << (OP_FREE_STATEID - 32) | 8617 1 << (OP_WRITE - 32) 8618 } 8619}; 8620 8621/* 8622 * Select the state protection mode for client `clp' given the server results 8623 * from exchange_id in `sp'. 8624 * 8625 * Returns 0 on success, negative errno otherwise. 8626 */ 8627static int nfs4_sp4_select_mode(struct nfs_client *clp, 8628 struct nfs41_state_protection *sp) 8629{ 8630 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 8631 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 8632 1 << (OP_EXCHANGE_ID - 32) | 8633 1 << (OP_CREATE_SESSION - 32) | 8634 1 << (OP_DESTROY_SESSION - 32) | 8635 1 << (OP_DESTROY_CLIENTID - 32) 8636 }; 8637 unsigned long flags = 0; 8638 unsigned int i; 8639 int ret = 0; 8640 8641 if (sp->how == SP4_MACH_CRED) { 8642 /* Print state protect result */ 8643 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 8644 for (i = 0; i <= LAST_NFS4_OP; i++) { 8645 if (test_bit(i, sp->enforce.u.longs)) 8646 dfprintk(MOUNT, " enforce op %d\n", i); 8647 if (test_bit(i, sp->allow.u.longs)) 8648 dfprintk(MOUNT, " allow op %d\n", i); 8649 } 8650 8651 /* make sure nothing is on enforce list that isn't supported */ 8652 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 8653 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 8654 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8655 ret = -EINVAL; 8656 goto out; 8657 } 8658 } 8659 8660 /* 8661 * Minimal mode - state operations are allowed to use machine 8662 * credential. Note this already happens by default, so the 8663 * client doesn't have to do anything more than the negotiation. 8664 * 8665 * NOTE: we don't care if EXCHANGE_ID is in the list - 8666 * we're already using the machine cred for exchange_id 8667 * and will never use a different cred. 8668 */ 8669 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 8670 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 8671 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 8672 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 8673 dfprintk(MOUNT, "sp4_mach_cred:\n"); 8674 dfprintk(MOUNT, " minimal mode enabled\n"); 8675 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags); 8676 } else { 8677 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 8678 ret = -EINVAL; 8679 goto out; 8680 } 8681 8682 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 8683 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 8684 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 8685 test_bit(OP_LOCKU, sp->allow.u.longs)) { 8686 dfprintk(MOUNT, " cleanup mode enabled\n"); 8687 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags); 8688 } 8689 8690 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 8691 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 8692 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags); 8693 } 8694 8695 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 8696 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 8697 dfprintk(MOUNT, " secinfo mode enabled\n"); 8698 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags); 8699 } 8700 8701 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 8702 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 8703 dfprintk(MOUNT, " stateid mode enabled\n"); 8704 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags); 8705 } 8706 8707 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 8708 dfprintk(MOUNT, " write mode enabled\n"); 8709 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags); 8710 } 8711 8712 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 8713 dfprintk(MOUNT, " commit mode enabled\n"); 8714 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags); 8715 } 8716 } 8717out: 8718 clp->cl_sp4_flags = flags; 8719 return ret; 8720} 8721 8722struct nfs41_exchange_id_data { 8723 struct nfs41_exchange_id_res res; 8724 struct nfs41_exchange_id_args args; 8725}; 8726 8727static void nfs4_exchange_id_release(void *data) 8728{ 8729 struct nfs41_exchange_id_data *cdata = 8730 (struct nfs41_exchange_id_data *)data; 8731 8732 nfs_put_client(cdata->args.client); 8733 kfree(cdata->res.impl_id); 8734 kfree(cdata->res.server_scope); 8735 kfree(cdata->res.server_owner); 8736 kfree(cdata); 8737} 8738 8739static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 8740 .rpc_release = nfs4_exchange_id_release, 8741}; 8742 8743/* 8744 * _nfs4_proc_exchange_id() 8745 * 8746 * Wrapper for EXCHANGE_ID operation. 8747 */ 8748static struct rpc_task * 8749nfs4_run_exchange_id(struct nfs_client *clp, const struct cred *cred, 8750 u32 sp4_how, struct rpc_xprt *xprt) 8751{ 8752 struct rpc_message msg = { 8753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 8754 .rpc_cred = cred, 8755 }; 8756 struct rpc_task_setup task_setup_data = { 8757 .rpc_client = clp->cl_rpcclient, 8758 .callback_ops = &nfs4_exchange_id_call_ops, 8759 .rpc_message = &msg, 8760 .flags = RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN, 8761 }; 8762 struct nfs41_exchange_id_data *calldata; 8763 int status; 8764 8765 if (!refcount_inc_not_zero(&clp->cl_count)) 8766 return ERR_PTR(-EIO); 8767 8768 status = -ENOMEM; 8769 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8770 if (!calldata) 8771 goto out; 8772 8773 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 8774 8775 status = nfs4_init_uniform_client_string(clp); 8776 if (status) 8777 goto out_calldata; 8778 8779 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 8780 GFP_NOFS); 8781 status = -ENOMEM; 8782 if (unlikely(calldata->res.server_owner == NULL)) 8783 goto out_calldata; 8784 8785 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 8786 GFP_NOFS); 8787 if (unlikely(calldata->res.server_scope == NULL)) 8788 goto out_server_owner; 8789 8790 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 8791 if (unlikely(calldata->res.impl_id == NULL)) 8792 goto out_server_scope; 8793 8794 switch (sp4_how) { 8795 case SP4_NONE: 8796 calldata->args.state_protect.how = SP4_NONE; 8797 break; 8798 8799 case SP4_MACH_CRED: 8800 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 8801 break; 8802 8803 default: 8804 /* unsupported! */ 8805 WARN_ON_ONCE(1); 8806 status = -EINVAL; 8807 goto out_impl_id; 8808 } 8809 if (xprt) { 8810 task_setup_data.rpc_xprt = xprt; 8811 task_setup_data.flags |= RPC_TASK_SOFTCONN; 8812 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 8813 sizeof(calldata->args.verifier.data)); 8814 } 8815 calldata->args.client = clp; 8816 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 8817 EXCHGID4_FLAG_BIND_PRINC_STATEID; 8818#ifdef CONFIG_NFS_V4_1_MIGRATION 8819 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR; 8820#endif 8821 if (test_bit(NFS_CS_DS, &clp->cl_flags)) 8822 calldata->args.flags |= EXCHGID4_FLAG_USE_PNFS_DS; 8823 msg.rpc_argp = &calldata->args; 8824 msg.rpc_resp = &calldata->res; 8825 task_setup_data.callback_data = calldata; 8826 8827 return rpc_run_task(&task_setup_data); 8828 8829out_impl_id: 8830 kfree(calldata->res.impl_id); 8831out_server_scope: 8832 kfree(calldata->res.server_scope); 8833out_server_owner: 8834 kfree(calldata->res.server_owner); 8835out_calldata: 8836 kfree(calldata); 8837out: 8838 nfs_put_client(clp); 8839 return ERR_PTR(status); 8840} 8841 8842/* 8843 * _nfs4_proc_exchange_id() 8844 * 8845 * Wrapper for EXCHANGE_ID operation. 8846 */ 8847static int _nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred, 8848 u32 sp4_how) 8849{ 8850 struct rpc_task *task; 8851 struct nfs41_exchange_id_args *argp; 8852 struct nfs41_exchange_id_res *resp; 8853 unsigned long now = jiffies; 8854 int status; 8855 8856 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL); 8857 if (IS_ERR(task)) 8858 return PTR_ERR(task); 8859 8860 argp = task->tk_msg.rpc_argp; 8861 resp = task->tk_msg.rpc_resp; 8862 status = task->tk_status; 8863 if (status != 0) 8864 goto out; 8865 8866 status = nfs4_check_cl_exchange_flags(resp->flags, 8867 clp->cl_mvops->minor_version); 8868 if (status != 0) 8869 goto out; 8870 8871 status = nfs4_sp4_select_mode(clp, &resp->state_protect); 8872 if (status != 0) 8873 goto out; 8874 8875 do_renew_lease(clp, now); 8876 8877 clp->cl_clientid = resp->clientid; 8878 clp->cl_exchange_flags = resp->flags; 8879 clp->cl_seqid = resp->seqid; 8880 /* Client ID is not confirmed */ 8881 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R)) 8882 clear_bit(NFS4_SESSION_ESTABLISHED, 8883 &clp->cl_session->session_state); 8884 8885 if (clp->cl_serverscope != NULL && 8886 !nfs41_same_server_scope(clp->cl_serverscope, 8887 resp->server_scope)) { 8888 dprintk("%s: server_scope mismatch detected\n", 8889 __func__); 8890 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 8891 } 8892 8893 swap(clp->cl_serverowner, resp->server_owner); 8894 swap(clp->cl_serverscope, resp->server_scope); 8895 swap(clp->cl_implid, resp->impl_id); 8896 8897 /* Save the EXCHANGE_ID verifier session trunk tests */ 8898 memcpy(clp->cl_confirm.data, argp->verifier.data, 8899 sizeof(clp->cl_confirm.data)); 8900out: 8901 trace_nfs4_exchange_id(clp, status); 8902 rpc_put_task(task); 8903 return status; 8904} 8905 8906/* 8907 * nfs4_proc_exchange_id() 8908 * 8909 * Returns zero, a negative errno, or a negative NFS4ERR status code. 8910 * 8911 * Since the clientid has expired, all compounds using sessions 8912 * associated with the stale clientid will be returning 8913 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 8914 * be in some phase of session reset. 8915 * 8916 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 8917 */ 8918int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred) 8919{ 8920 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 8921 int status; 8922 8923 /* try SP4_MACH_CRED if krb5i/p */ 8924 if (authflavor == RPC_AUTH_GSS_KRB5I || 8925 authflavor == RPC_AUTH_GSS_KRB5P) { 8926 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 8927 if (!status) 8928 return 0; 8929 } 8930 8931 /* try SP4_NONE */ 8932 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 8933} 8934 8935/** 8936 * nfs4_test_session_trunk 8937 * 8938 * This is an add_xprt_test() test function called from 8939 * rpc_clnt_setup_test_and_add_xprt. 8940 * 8941 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 8942 * and is dereferrenced in nfs4_exchange_id_release 8943 * 8944 * Upon success, add the new transport to the rpc_clnt 8945 * 8946 * @clnt: struct rpc_clnt to get new transport 8947 * @xprt: the rpc_xprt to test 8948 * @data: call data for _nfs4_proc_exchange_id. 8949 */ 8950void nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 8951 void *data) 8952{ 8953 struct nfs4_add_xprt_data *adata = data; 8954 struct rpc_task *task; 8955 int status; 8956 8957 u32 sp4_how; 8958 8959 dprintk("--> %s try %s\n", __func__, 8960 xprt->address_strings[RPC_DISPLAY_ADDR]); 8961 8962 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 8963 8964try_again: 8965 /* Test connection for session trunking. Async exchange_id call */ 8966 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 8967 if (IS_ERR(task)) 8968 return; 8969 8970 status = task->tk_status; 8971 if (status == 0) { 8972 status = nfs4_detect_session_trunking(adata->clp, 8973 task->tk_msg.rpc_resp, xprt); 8974 trace_nfs4_trunked_exchange_id(adata->clp, 8975 xprt->address_strings[RPC_DISPLAY_ADDR], status); 8976 } 8977 if (status == 0) 8978 rpc_clnt_xprt_switch_add_xprt(clnt, xprt); 8979 else if (status != -NFS4ERR_DELAY && rpc_clnt_xprt_switch_has_addr(clnt, 8980 (struct sockaddr *)&xprt->addr)) 8981 rpc_clnt_xprt_switch_remove_xprt(clnt, xprt); 8982 8983 rpc_put_task(task); 8984 if (status == -NFS4ERR_DELAY) { 8985 ssleep(1); 8986 goto try_again; 8987 } 8988} 8989EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 8990 8991static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 8992 const struct cred *cred) 8993{ 8994 struct rpc_message msg = { 8995 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 8996 .rpc_argp = clp, 8997 .rpc_cred = cred, 8998 }; 8999 int status; 9000 9001 status = rpc_call_sync(clp->cl_rpcclient, &msg, 9002 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9003 trace_nfs4_destroy_clientid(clp, status); 9004 if (status) 9005 dprintk("NFS: Got error %d from the server %s on " 9006 "DESTROY_CLIENTID.", status, clp->cl_hostname); 9007 return status; 9008} 9009 9010static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 9011 const struct cred *cred) 9012{ 9013 unsigned int loop; 9014 int ret; 9015 9016 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 9017 ret = _nfs4_proc_destroy_clientid(clp, cred); 9018 switch (ret) { 9019 case -NFS4ERR_DELAY: 9020 case -NFS4ERR_CLIENTID_BUSY: 9021 ssleep(1); 9022 break; 9023 default: 9024 return ret; 9025 } 9026 } 9027 return 0; 9028} 9029 9030int nfs4_destroy_clientid(struct nfs_client *clp) 9031{ 9032 const struct cred *cred; 9033 int ret = 0; 9034 9035 if (clp->cl_mvops->minor_version < 1) 9036 goto out; 9037 if (clp->cl_exchange_flags == 0) 9038 goto out; 9039 if (clp->cl_preserve_clid) 9040 goto out; 9041 cred = nfs4_get_clid_cred(clp); 9042 ret = nfs4_proc_destroy_clientid(clp, cred); 9043 put_cred(cred); 9044 switch (ret) { 9045 case 0: 9046 case -NFS4ERR_STALE_CLIENTID: 9047 clp->cl_exchange_flags = 0; 9048 } 9049out: 9050 return ret; 9051} 9052 9053#endif /* CONFIG_NFS_V4_1 */ 9054 9055struct nfs4_get_lease_time_data { 9056 struct nfs4_get_lease_time_args *args; 9057 struct nfs4_get_lease_time_res *res; 9058 struct nfs_client *clp; 9059}; 9060 9061static void nfs4_get_lease_time_prepare(struct rpc_task *task, 9062 void *calldata) 9063{ 9064 struct nfs4_get_lease_time_data *data = 9065 (struct nfs4_get_lease_time_data *)calldata; 9066 9067 /* just setup sequence, do not trigger session recovery 9068 since we're invoked within one */ 9069 nfs4_setup_sequence(data->clp, 9070 &data->args->la_seq_args, 9071 &data->res->lr_seq_res, 9072 task); 9073} 9074 9075/* 9076 * Called from nfs4_state_manager thread for session setup, so don't recover 9077 * from sequence operation or clientid errors. 9078 */ 9079static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 9080{ 9081 struct nfs4_get_lease_time_data *data = 9082 (struct nfs4_get_lease_time_data *)calldata; 9083 9084 if (!nfs4_sequence_done(task, &data->res->lr_seq_res)) 9085 return; 9086 switch (task->tk_status) { 9087 case -NFS4ERR_DELAY: 9088 case -NFS4ERR_GRACE: 9089 rpc_delay(task, NFS4_POLL_RETRY_MIN); 9090 task->tk_status = 0; 9091 fallthrough; 9092 case -NFS4ERR_RETRY_UNCACHED_REP: 9093 rpc_restart_call_prepare(task); 9094 return; 9095 } 9096} 9097 9098static const struct rpc_call_ops nfs4_get_lease_time_ops = { 9099 .rpc_call_prepare = nfs4_get_lease_time_prepare, 9100 .rpc_call_done = nfs4_get_lease_time_done, 9101}; 9102 9103int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 9104{ 9105 struct nfs4_get_lease_time_args args; 9106 struct nfs4_get_lease_time_res res = { 9107 .lr_fsinfo = fsinfo, 9108 }; 9109 struct nfs4_get_lease_time_data data = { 9110 .args = &args, 9111 .res = &res, 9112 .clp = clp, 9113 }; 9114 struct rpc_message msg = { 9115 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 9116 .rpc_argp = &args, 9117 .rpc_resp = &res, 9118 }; 9119 struct rpc_task_setup task_setup = { 9120 .rpc_client = clp->cl_rpcclient, 9121 .rpc_message = &msg, 9122 .callback_ops = &nfs4_get_lease_time_ops, 9123 .callback_data = &data, 9124 .flags = RPC_TASK_TIMEOUT, 9125 }; 9126 9127 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0, 1); 9128 return nfs4_call_sync_custom(&task_setup); 9129} 9130 9131#ifdef CONFIG_NFS_V4_1 9132 9133/* 9134 * Initialize the values to be used by the client in CREATE_SESSION 9135 * If nfs4_init_session set the fore channel request and response sizes, 9136 * use them. 9137 * 9138 * Set the back channel max_resp_sz_cached to zero to force the client to 9139 * always set csa_cachethis to FALSE because the current implementation 9140 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 9141 */ 9142static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 9143 struct rpc_clnt *clnt) 9144{ 9145 unsigned int max_rqst_sz, max_resp_sz; 9146 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 9147 unsigned int max_bc_slots = rpc_num_bc_slots(clnt); 9148 9149 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 9150 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 9151 9152 /* Fore channel attributes */ 9153 args->fc_attrs.max_rqst_sz = max_rqst_sz; 9154 args->fc_attrs.max_resp_sz = max_resp_sz; 9155 args->fc_attrs.max_ops = NFS4_MAX_OPS; 9156 args->fc_attrs.max_reqs = max_session_slots; 9157 9158 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 9159 "max_ops=%u max_reqs=%u\n", 9160 __func__, 9161 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 9162 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 9163 9164 /* Back channel attributes */ 9165 args->bc_attrs.max_rqst_sz = max_bc_payload; 9166 args->bc_attrs.max_resp_sz = max_bc_payload; 9167 args->bc_attrs.max_resp_sz_cached = 0; 9168 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 9169 args->bc_attrs.max_reqs = max_t(unsigned short, max_session_cb_slots, 1); 9170 if (args->bc_attrs.max_reqs > max_bc_slots) 9171 args->bc_attrs.max_reqs = max_bc_slots; 9172 9173 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 9174 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 9175 __func__, 9176 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 9177 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 9178 args->bc_attrs.max_reqs); 9179} 9180 9181static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 9182 struct nfs41_create_session_res *res) 9183{ 9184 struct nfs4_channel_attrs *sent = &args->fc_attrs; 9185 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 9186 9187 if (rcvd->max_resp_sz > sent->max_resp_sz) 9188 return -EINVAL; 9189 /* 9190 * Our requested max_ops is the minimum we need; we're not 9191 * prepared to break up compounds into smaller pieces than that. 9192 * So, no point even trying to continue if the server won't 9193 * cooperate: 9194 */ 9195 if (rcvd->max_ops < sent->max_ops) 9196 return -EINVAL; 9197 if (rcvd->max_reqs == 0) 9198 return -EINVAL; 9199 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 9200 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 9201 return 0; 9202} 9203 9204static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 9205 struct nfs41_create_session_res *res) 9206{ 9207 struct nfs4_channel_attrs *sent = &args->bc_attrs; 9208 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 9209 9210 if (!(res->flags & SESSION4_BACK_CHAN)) 9211 goto out; 9212 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 9213 return -EINVAL; 9214 if (rcvd->max_resp_sz < sent->max_resp_sz) 9215 return -EINVAL; 9216 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 9217 return -EINVAL; 9218 if (rcvd->max_ops > sent->max_ops) 9219 return -EINVAL; 9220 if (rcvd->max_reqs > sent->max_reqs) 9221 return -EINVAL; 9222out: 9223 return 0; 9224} 9225 9226static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 9227 struct nfs41_create_session_res *res) 9228{ 9229 int ret; 9230 9231 ret = nfs4_verify_fore_channel_attrs(args, res); 9232 if (ret) 9233 return ret; 9234 return nfs4_verify_back_channel_attrs(args, res); 9235} 9236 9237static void nfs4_update_session(struct nfs4_session *session, 9238 struct nfs41_create_session_res *res) 9239{ 9240 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 9241 /* Mark client id and session as being confirmed */ 9242 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 9243 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 9244 session->flags = res->flags; 9245 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 9246 if (res->flags & SESSION4_BACK_CHAN) 9247 memcpy(&session->bc_attrs, &res->bc_attrs, 9248 sizeof(session->bc_attrs)); 9249} 9250 9251static int _nfs4_proc_create_session(struct nfs_client *clp, 9252 const struct cred *cred) 9253{ 9254 struct nfs4_session *session = clp->cl_session; 9255 struct nfs41_create_session_args args = { 9256 .client = clp, 9257 .clientid = clp->cl_clientid, 9258 .seqid = clp->cl_seqid, 9259 .cb_program = NFS4_CALLBACK, 9260 }; 9261 struct nfs41_create_session_res res; 9262 9263 struct rpc_message msg = { 9264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 9265 .rpc_argp = &args, 9266 .rpc_resp = &res, 9267 .rpc_cred = cred, 9268 }; 9269 int status; 9270 9271 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 9272 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 9273 9274 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9275 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9276 trace_nfs4_create_session(clp, status); 9277 9278 switch (status) { 9279 case -NFS4ERR_STALE_CLIENTID: 9280 case -NFS4ERR_DELAY: 9281 case -ETIMEDOUT: 9282 case -EACCES: 9283 case -EAGAIN: 9284 goto out; 9285 } 9286 9287 clp->cl_seqid++; 9288 if (!status) { 9289 /* Verify the session's negotiated channel_attrs values */ 9290 status = nfs4_verify_channel_attrs(&args, &res); 9291 /* Increment the clientid slot sequence id */ 9292 if (status) 9293 goto out; 9294 nfs4_update_session(session, &res); 9295 } 9296out: 9297 return status; 9298} 9299 9300/* 9301 * Issues a CREATE_SESSION operation to the server. 9302 * It is the responsibility of the caller to verify the session is 9303 * expired before calling this routine. 9304 */ 9305int nfs4_proc_create_session(struct nfs_client *clp, const struct cred *cred) 9306{ 9307 int status; 9308 unsigned *ptr; 9309 struct nfs4_session *session = clp->cl_session; 9310 struct nfs4_add_xprt_data xprtdata = { 9311 .clp = clp, 9312 }; 9313 struct rpc_add_xprt_test rpcdata = { 9314 .add_xprt_test = clp->cl_mvops->session_trunk, 9315 .data = &xprtdata, 9316 }; 9317 9318 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 9319 9320 status = _nfs4_proc_create_session(clp, cred); 9321 if (status) 9322 goto out; 9323 9324 /* Init or reset the session slot tables */ 9325 status = nfs4_setup_session_slot_tables(session); 9326 dprintk("slot table setup returned %d\n", status); 9327 if (status) 9328 goto out; 9329 9330 ptr = (unsigned *)&session->sess_id.data[0]; 9331 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 9332 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 9333 rpc_clnt_probe_trunked_xprts(clp->cl_rpcclient, &rpcdata); 9334out: 9335 return status; 9336} 9337 9338/* 9339 * Issue the over-the-wire RPC DESTROY_SESSION. 9340 * The caller must serialize access to this routine. 9341 */ 9342int nfs4_proc_destroy_session(struct nfs4_session *session, 9343 const struct cred *cred) 9344{ 9345 struct rpc_message msg = { 9346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 9347 .rpc_argp = session, 9348 .rpc_cred = cred, 9349 }; 9350 int status = 0; 9351 9352 /* session is still being setup */ 9353 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 9354 return 0; 9355 9356 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 9357 RPC_TASK_TIMEOUT | RPC_TASK_NO_ROUND_ROBIN); 9358 trace_nfs4_destroy_session(session->clp, status); 9359 9360 if (status) 9361 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 9362 "Session has been destroyed regardless...\n", status); 9363 rpc_clnt_manage_trunked_xprts(session->clp->cl_rpcclient); 9364 return status; 9365} 9366 9367/* 9368 * Renew the cl_session lease. 9369 */ 9370struct nfs4_sequence_data { 9371 struct nfs_client *clp; 9372 struct nfs4_sequence_args args; 9373 struct nfs4_sequence_res res; 9374}; 9375 9376static void nfs41_sequence_release(void *data) 9377{ 9378 struct nfs4_sequence_data *calldata = data; 9379 struct nfs_client *clp = calldata->clp; 9380 9381 if (refcount_read(&clp->cl_count) > 1) 9382 nfs4_schedule_state_renewal(clp); 9383 nfs_put_client(clp); 9384 kfree(calldata); 9385} 9386 9387static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9388{ 9389 switch(task->tk_status) { 9390 case -NFS4ERR_DELAY: 9391 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9392 return -EAGAIN; 9393 default: 9394 nfs4_schedule_lease_recovery(clp); 9395 } 9396 return 0; 9397} 9398 9399static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 9400{ 9401 struct nfs4_sequence_data *calldata = data; 9402 struct nfs_client *clp = calldata->clp; 9403 9404 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 9405 return; 9406 9407 trace_nfs4_sequence(clp, task->tk_status); 9408 if (task->tk_status < 0 && !task->tk_client->cl_shutdown) { 9409 dprintk("%s ERROR %d\n", __func__, task->tk_status); 9410 if (refcount_read(&clp->cl_count) == 1) 9411 return; 9412 9413 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 9414 rpc_restart_call_prepare(task); 9415 return; 9416 } 9417 } 9418 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 9419} 9420 9421static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 9422{ 9423 struct nfs4_sequence_data *calldata = data; 9424 struct nfs_client *clp = calldata->clp; 9425 struct nfs4_sequence_args *args; 9426 struct nfs4_sequence_res *res; 9427 9428 args = task->tk_msg.rpc_argp; 9429 res = task->tk_msg.rpc_resp; 9430 9431 nfs4_setup_sequence(clp, args, res, task); 9432} 9433 9434static const struct rpc_call_ops nfs41_sequence_ops = { 9435 .rpc_call_done = nfs41_sequence_call_done, 9436 .rpc_call_prepare = nfs41_sequence_prepare, 9437 .rpc_release = nfs41_sequence_release, 9438}; 9439 9440static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 9441 const struct cred *cred, 9442 struct nfs4_slot *slot, 9443 bool is_privileged) 9444{ 9445 struct nfs4_sequence_data *calldata; 9446 struct rpc_message msg = { 9447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 9448 .rpc_cred = cred, 9449 }; 9450 struct rpc_task_setup task_setup_data = { 9451 .rpc_client = clp->cl_rpcclient, 9452 .rpc_message = &msg, 9453 .callback_ops = &nfs41_sequence_ops, 9454 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT | RPC_TASK_MOVEABLE, 9455 }; 9456 struct rpc_task *ret; 9457 9458 ret = ERR_PTR(-EIO); 9459 if (!refcount_inc_not_zero(&clp->cl_count)) 9460 goto out_err; 9461 9462 ret = ERR_PTR(-ENOMEM); 9463 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL); 9464 if (calldata == NULL) 9465 goto out_put_clp; 9466 nfs4_init_sequence(&calldata->args, &calldata->res, 0, is_privileged); 9467 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot); 9468 msg.rpc_argp = &calldata->args; 9469 msg.rpc_resp = &calldata->res; 9470 calldata->clp = clp; 9471 task_setup_data.callback_data = calldata; 9472 9473 ret = rpc_run_task(&task_setup_data); 9474 if (IS_ERR(ret)) 9475 goto out_err; 9476 return ret; 9477out_put_clp: 9478 nfs_put_client(clp); 9479out_err: 9480 nfs41_release_slot(slot); 9481 return ret; 9482} 9483 9484static int nfs41_proc_async_sequence(struct nfs_client *clp, const struct cred *cred, unsigned renew_flags) 9485{ 9486 struct rpc_task *task; 9487 int ret = 0; 9488 9489 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 9490 return -EAGAIN; 9491 task = _nfs41_proc_sequence(clp, cred, NULL, false); 9492 if (IS_ERR(task)) 9493 ret = PTR_ERR(task); 9494 else 9495 rpc_put_task_async(task); 9496 dprintk("<-- %s status=%d\n", __func__, ret); 9497 return ret; 9498} 9499 9500static int nfs4_proc_sequence(struct nfs_client *clp, const struct cred *cred) 9501{ 9502 struct rpc_task *task; 9503 int ret; 9504 9505 task = _nfs41_proc_sequence(clp, cred, NULL, true); 9506 if (IS_ERR(task)) { 9507 ret = PTR_ERR(task); 9508 goto out; 9509 } 9510 ret = rpc_wait_for_completion_task(task); 9511 if (!ret) 9512 ret = task->tk_status; 9513 rpc_put_task(task); 9514out: 9515 dprintk("<-- %s status=%d\n", __func__, ret); 9516 return ret; 9517} 9518 9519struct nfs4_reclaim_complete_data { 9520 struct nfs_client *clp; 9521 struct nfs41_reclaim_complete_args arg; 9522 struct nfs41_reclaim_complete_res res; 9523}; 9524 9525static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 9526{ 9527 struct nfs4_reclaim_complete_data *calldata = data; 9528 9529 nfs4_setup_sequence(calldata->clp, 9530 &calldata->arg.seq_args, 9531 &calldata->res.seq_res, 9532 task); 9533} 9534 9535static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 9536{ 9537 switch(task->tk_status) { 9538 case 0: 9539 wake_up_all(&clp->cl_lock_waitq); 9540 fallthrough; 9541 case -NFS4ERR_COMPLETE_ALREADY: 9542 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 9543 break; 9544 case -NFS4ERR_DELAY: 9545 rpc_delay(task, NFS4_POLL_RETRY_MAX); 9546 fallthrough; 9547 case -NFS4ERR_RETRY_UNCACHED_REP: 9548 case -EACCES: 9549 dprintk("%s: failed to reclaim complete error %d for server %s, retrying\n", 9550 __func__, task->tk_status, clp->cl_hostname); 9551 return -EAGAIN; 9552 case -NFS4ERR_BADSESSION: 9553 case -NFS4ERR_DEADSESSION: 9554 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 9555 break; 9556 default: 9557 nfs4_schedule_lease_recovery(clp); 9558 } 9559 return 0; 9560} 9561 9562static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 9563{ 9564 struct nfs4_reclaim_complete_data *calldata = data; 9565 struct nfs_client *clp = calldata->clp; 9566 struct nfs4_sequence_res *res = &calldata->res.seq_res; 9567 9568 if (!nfs41_sequence_done(task, res)) 9569 return; 9570 9571 trace_nfs4_reclaim_complete(clp, task->tk_status); 9572 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 9573 rpc_restart_call_prepare(task); 9574 return; 9575 } 9576} 9577 9578static void nfs4_free_reclaim_complete_data(void *data) 9579{ 9580 struct nfs4_reclaim_complete_data *calldata = data; 9581 9582 kfree(calldata); 9583} 9584 9585static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 9586 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 9587 .rpc_call_done = nfs4_reclaim_complete_done, 9588 .rpc_release = nfs4_free_reclaim_complete_data, 9589}; 9590 9591/* 9592 * Issue a global reclaim complete. 9593 */ 9594static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 9595 const struct cred *cred) 9596{ 9597 struct nfs4_reclaim_complete_data *calldata; 9598 struct rpc_message msg = { 9599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 9600 .rpc_cred = cred, 9601 }; 9602 struct rpc_task_setup task_setup_data = { 9603 .rpc_client = clp->cl_rpcclient, 9604 .rpc_message = &msg, 9605 .callback_ops = &nfs4_reclaim_complete_call_ops, 9606 .flags = RPC_TASK_NO_ROUND_ROBIN, 9607 }; 9608 int status = -ENOMEM; 9609 9610 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 9611 if (calldata == NULL) 9612 goto out; 9613 calldata->clp = clp; 9614 calldata->arg.one_fs = 0; 9615 9616 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0, 1); 9617 msg.rpc_argp = &calldata->arg; 9618 msg.rpc_resp = &calldata->res; 9619 task_setup_data.callback_data = calldata; 9620 status = nfs4_call_sync_custom(&task_setup_data); 9621out: 9622 dprintk("<-- %s status=%d\n", __func__, status); 9623 return status; 9624} 9625 9626static void 9627nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 9628{ 9629 struct nfs4_layoutget *lgp = calldata; 9630 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 9631 9632 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 9633 &lgp->res.seq_res, task); 9634} 9635 9636static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 9637{ 9638 struct nfs4_layoutget *lgp = calldata; 9639 9640 nfs41_sequence_process(task, &lgp->res.seq_res); 9641} 9642 9643static int 9644nfs4_layoutget_handle_exception(struct rpc_task *task, 9645 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 9646{ 9647 struct inode *inode = lgp->args.inode; 9648 struct nfs_server *server = NFS_SERVER(inode); 9649 struct pnfs_layout_hdr *lo = lgp->lo; 9650 int nfs4err = task->tk_status; 9651 int err, status = 0; 9652 LIST_HEAD(head); 9653 9654 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 9655 9656 nfs4_sequence_free_slot(&lgp->res.seq_res); 9657 9658 exception->state = NULL; 9659 exception->stateid = NULL; 9660 9661 switch (nfs4err) { 9662 case 0: 9663 goto out; 9664 9665 /* 9666 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 9667 * on the file. set tk_status to -ENODATA to tell upper layer to 9668 * retry go inband. 9669 */ 9670 case -NFS4ERR_LAYOUTUNAVAILABLE: 9671 status = -ENODATA; 9672 goto out; 9673 /* 9674 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 9675 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 9676 */ 9677 case -NFS4ERR_BADLAYOUT: 9678 status = -EOVERFLOW; 9679 goto out; 9680 /* 9681 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 9682 * (or clients) writing to the same RAID stripe except when 9683 * the minlength argument is 0 (see RFC5661 section 18.43.3). 9684 * 9685 * Treat it like we would RECALLCONFLICT -- we retry for a little 9686 * while, and then eventually give up. 9687 */ 9688 case -NFS4ERR_LAYOUTTRYLATER: 9689 if (lgp->args.minlength == 0) { 9690 status = -EOVERFLOW; 9691 goto out; 9692 } 9693 status = -EBUSY; 9694 break; 9695 case -NFS4ERR_RECALLCONFLICT: 9696 case -NFS4ERR_RETURNCONFLICT: 9697 status = -ERECALLCONFLICT; 9698 break; 9699 case -NFS4ERR_DELEG_REVOKED: 9700 case -NFS4ERR_ADMIN_REVOKED: 9701 case -NFS4ERR_EXPIRED: 9702 case -NFS4ERR_BAD_STATEID: 9703 exception->timeout = 0; 9704 spin_lock(&inode->i_lock); 9705 /* If the open stateid was bad, then recover it. */ 9706 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 9707 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 9708 spin_unlock(&inode->i_lock); 9709 exception->state = lgp->args.ctx->state; 9710 exception->stateid = &lgp->args.stateid; 9711 break; 9712 } 9713 9714 /* 9715 * Mark the bad layout state as invalid, then retry 9716 */ 9717 pnfs_mark_layout_stateid_invalid(lo, &head); 9718 spin_unlock(&inode->i_lock); 9719 nfs_commit_inode(inode, 0); 9720 pnfs_free_lseg_list(&head); 9721 status = -EAGAIN; 9722 goto out; 9723 } 9724 9725 err = nfs4_handle_exception(server, nfs4err, exception); 9726 if (!status) { 9727 if (exception->retry) 9728 status = -EAGAIN; 9729 else 9730 status = err; 9731 } 9732out: 9733 return status; 9734} 9735 9736size_t max_response_pages(struct nfs_server *server) 9737{ 9738 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 9739 return nfs_page_array_len(0, max_resp_sz); 9740} 9741 9742static void nfs4_layoutget_release(void *calldata) 9743{ 9744 struct nfs4_layoutget *lgp = calldata; 9745 9746 nfs4_sequence_free_slot(&lgp->res.seq_res); 9747 pnfs_layoutget_free(lgp); 9748} 9749 9750static const struct rpc_call_ops nfs4_layoutget_call_ops = { 9751 .rpc_call_prepare = nfs4_layoutget_prepare, 9752 .rpc_call_done = nfs4_layoutget_done, 9753 .rpc_release = nfs4_layoutget_release, 9754}; 9755 9756struct pnfs_layout_segment * 9757nfs4_proc_layoutget(struct nfs4_layoutget *lgp, 9758 struct nfs4_exception *exception) 9759{ 9760 struct inode *inode = lgp->args.inode; 9761 struct nfs_server *server = NFS_SERVER(inode); 9762 struct rpc_task *task; 9763 struct rpc_message msg = { 9764 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 9765 .rpc_argp = &lgp->args, 9766 .rpc_resp = &lgp->res, 9767 .rpc_cred = lgp->cred, 9768 }; 9769 struct rpc_task_setup task_setup_data = { 9770 .rpc_client = server->client, 9771 .rpc_message = &msg, 9772 .callback_ops = &nfs4_layoutget_call_ops, 9773 .callback_data = lgp, 9774 .flags = RPC_TASK_ASYNC | RPC_TASK_CRED_NOREF | 9775 RPC_TASK_MOVEABLE, 9776 }; 9777 struct pnfs_layout_segment *lseg = NULL; 9778 int status = 0; 9779 9780 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0, 0); 9781 exception->retry = 0; 9782 9783 task = rpc_run_task(&task_setup_data); 9784 if (IS_ERR(task)) 9785 return ERR_CAST(task); 9786 9787 status = rpc_wait_for_completion_task(task); 9788 if (status != 0) 9789 goto out; 9790 9791 if (task->tk_status < 0) { 9792 exception->retry = 1; 9793 status = nfs4_layoutget_handle_exception(task, lgp, exception); 9794 } else if (lgp->res.layoutp->len == 0) { 9795 exception->retry = 1; 9796 status = -EAGAIN; 9797 nfs4_update_delay(&exception->timeout); 9798 } else 9799 lseg = pnfs_layout_process(lgp); 9800out: 9801 trace_nfs4_layoutget(lgp->args.ctx, 9802 &lgp->args.range, 9803 &lgp->res.range, 9804 &lgp->res.stateid, 9805 status); 9806 9807 rpc_put_task(task); 9808 dprintk("<-- %s status=%d\n", __func__, status); 9809 if (status) 9810 return ERR_PTR(status); 9811 return lseg; 9812} 9813 9814static void 9815nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 9816{ 9817 struct nfs4_layoutreturn *lrp = calldata; 9818 9819 nfs4_setup_sequence(lrp->clp, 9820 &lrp->args.seq_args, 9821 &lrp->res.seq_res, 9822 task); 9823 if (!pnfs_layout_is_valid(lrp->args.layout)) 9824 rpc_exit(task, 0); 9825} 9826 9827static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 9828{ 9829 struct nfs4_layoutreturn *lrp = calldata; 9830 struct nfs_server *server; 9831 9832 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 9833 return; 9834 9835 /* 9836 * Was there an RPC level error? Assume the call succeeded, 9837 * and that we need to release the layout 9838 */ 9839 if (task->tk_rpc_status != 0 && RPC_WAS_SENT(task)) { 9840 lrp->res.lrs_present = 0; 9841 return; 9842 } 9843 9844 server = NFS_SERVER(lrp->args.inode); 9845 switch (task->tk_status) { 9846 case -NFS4ERR_OLD_STATEID: 9847 if (nfs4_layout_refresh_old_stateid(&lrp->args.stateid, 9848 &lrp->args.range, 9849 lrp->args.inode)) 9850 goto out_restart; 9851 fallthrough; 9852 default: 9853 task->tk_status = 0; 9854 fallthrough; 9855 case 0: 9856 break; 9857 case -NFS4ERR_DELAY: 9858 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 9859 break; 9860 goto out_restart; 9861 } 9862 return; 9863out_restart: 9864 task->tk_status = 0; 9865 nfs4_sequence_free_slot(&lrp->res.seq_res); 9866 rpc_restart_call_prepare(task); 9867} 9868 9869static void nfs4_layoutreturn_release(void *calldata) 9870{ 9871 struct nfs4_layoutreturn *lrp = calldata; 9872 struct pnfs_layout_hdr *lo = lrp->args.layout; 9873 9874 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, 9875 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 9876 nfs4_sequence_free_slot(&lrp->res.seq_res); 9877 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 9878 lrp->ld_private.ops->free(&lrp->ld_private); 9879 pnfs_put_layout_hdr(lrp->args.layout); 9880 nfs_iput_and_deactive(lrp->inode); 9881 put_cred(lrp->cred); 9882 kfree(calldata); 9883} 9884 9885static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 9886 .rpc_call_prepare = nfs4_layoutreturn_prepare, 9887 .rpc_call_done = nfs4_layoutreturn_done, 9888 .rpc_release = nfs4_layoutreturn_release, 9889}; 9890 9891int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 9892{ 9893 struct rpc_task *task; 9894 struct rpc_message msg = { 9895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 9896 .rpc_argp = &lrp->args, 9897 .rpc_resp = &lrp->res, 9898 .rpc_cred = lrp->cred, 9899 }; 9900 struct rpc_task_setup task_setup_data = { 9901 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 9902 .rpc_message = &msg, 9903 .callback_ops = &nfs4_layoutreturn_call_ops, 9904 .callback_data = lrp, 9905 .flags = RPC_TASK_MOVEABLE, 9906 }; 9907 int status = 0; 9908 9909 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 9910 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 9911 &task_setup_data.rpc_client, &msg); 9912 9913 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 9914 if (!sync) { 9915 if (!lrp->inode) { 9916 nfs4_layoutreturn_release(lrp); 9917 return -EAGAIN; 9918 } 9919 task_setup_data.flags |= RPC_TASK_ASYNC; 9920 } 9921 if (!lrp->inode) 9922 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9923 1); 9924 else 9925 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1, 9926 0); 9927 task = rpc_run_task(&task_setup_data); 9928 if (IS_ERR(task)) 9929 return PTR_ERR(task); 9930 if (sync) 9931 status = task->tk_status; 9932 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 9933 dprintk("<-- %s status=%d\n", __func__, status); 9934 rpc_put_task(task); 9935 return status; 9936} 9937 9938static int 9939_nfs4_proc_getdeviceinfo(struct nfs_server *server, 9940 struct pnfs_device *pdev, 9941 const struct cred *cred) 9942{ 9943 struct nfs4_getdeviceinfo_args args = { 9944 .pdev = pdev, 9945 .notify_types = NOTIFY_DEVICEID4_CHANGE | 9946 NOTIFY_DEVICEID4_DELETE, 9947 }; 9948 struct nfs4_getdeviceinfo_res res = { 9949 .pdev = pdev, 9950 }; 9951 struct rpc_message msg = { 9952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 9953 .rpc_argp = &args, 9954 .rpc_resp = &res, 9955 .rpc_cred = cred, 9956 }; 9957 int status; 9958 9959 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 9960 if (res.notification & ~args.notify_types) 9961 dprintk("%s: unsupported notification\n", __func__); 9962 if (res.notification != args.notify_types) 9963 pdev->nocache = 1; 9964 9965 trace_nfs4_getdeviceinfo(server, &pdev->dev_id, status); 9966 9967 dprintk("<-- %s status=%d\n", __func__, status); 9968 9969 return status; 9970} 9971 9972int nfs4_proc_getdeviceinfo(struct nfs_server *server, 9973 struct pnfs_device *pdev, 9974 const struct cred *cred) 9975{ 9976 struct nfs4_exception exception = { }; 9977 int err; 9978 9979 do { 9980 err = nfs4_handle_exception(server, 9981 _nfs4_proc_getdeviceinfo(server, pdev, cred), 9982 &exception); 9983 } while (exception.retry); 9984 return err; 9985} 9986EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 9987 9988static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 9989{ 9990 struct nfs4_layoutcommit_data *data = calldata; 9991 struct nfs_server *server = NFS_SERVER(data->args.inode); 9992 9993 nfs4_setup_sequence(server->nfs_client, 9994 &data->args.seq_args, 9995 &data->res.seq_res, 9996 task); 9997} 9998 9999static void 10000nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 10001{ 10002 struct nfs4_layoutcommit_data *data = calldata; 10003 struct nfs_server *server = NFS_SERVER(data->args.inode); 10004 10005 if (!nfs41_sequence_done(task, &data->res.seq_res)) 10006 return; 10007 10008 switch (task->tk_status) { /* Just ignore these failures */ 10009 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 10010 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 10011 case -NFS4ERR_BADLAYOUT: /* no layout */ 10012 case -NFS4ERR_GRACE: /* loca_recalim always false */ 10013 task->tk_status = 0; 10014 break; 10015 case 0: 10016 break; 10017 default: 10018 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 10019 rpc_restart_call_prepare(task); 10020 return; 10021 } 10022 } 10023} 10024 10025static void nfs4_layoutcommit_release(void *calldata) 10026{ 10027 struct nfs4_layoutcommit_data *data = calldata; 10028 10029 pnfs_cleanup_layoutcommit(data); 10030 nfs_post_op_update_inode_force_wcc(data->args.inode, 10031 data->res.fattr); 10032 put_cred(data->cred); 10033 nfs_iput_and_deactive(data->inode); 10034 kfree(data); 10035} 10036 10037static const struct rpc_call_ops nfs4_layoutcommit_ops = { 10038 .rpc_call_prepare = nfs4_layoutcommit_prepare, 10039 .rpc_call_done = nfs4_layoutcommit_done, 10040 .rpc_release = nfs4_layoutcommit_release, 10041}; 10042 10043int 10044nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 10045{ 10046 struct rpc_message msg = { 10047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 10048 .rpc_argp = &data->args, 10049 .rpc_resp = &data->res, 10050 .rpc_cred = data->cred, 10051 }; 10052 struct rpc_task_setup task_setup_data = { 10053 .task = &data->task, 10054 .rpc_client = NFS_CLIENT(data->args.inode), 10055 .rpc_message = &msg, 10056 .callback_ops = &nfs4_layoutcommit_ops, 10057 .callback_data = data, 10058 .flags = RPC_TASK_MOVEABLE, 10059 }; 10060 struct rpc_task *task; 10061 int status = 0; 10062 10063 dprintk("NFS: initiating layoutcommit call. sync %d " 10064 "lbw: %llu inode %lu\n", sync, 10065 data->args.lastbytewritten, 10066 data->args.inode->i_ino); 10067 10068 if (!sync) { 10069 data->inode = nfs_igrab_and_active(data->args.inode); 10070 if (data->inode == NULL) { 10071 nfs4_layoutcommit_release(data); 10072 return -EAGAIN; 10073 } 10074 task_setup_data.flags = RPC_TASK_ASYNC; 10075 } 10076 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, 0); 10077 task = rpc_run_task(&task_setup_data); 10078 if (IS_ERR(task)) 10079 return PTR_ERR(task); 10080 if (sync) 10081 status = task->tk_status; 10082 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 10083 dprintk("%s: status %d\n", __func__, status); 10084 rpc_put_task(task); 10085 return status; 10086} 10087 10088/* 10089 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 10090 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 10091 */ 10092static int 10093_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 10094 struct nfs_fsinfo *info, 10095 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 10096{ 10097 struct nfs41_secinfo_no_name_args args = { 10098 .style = SECINFO_STYLE_CURRENT_FH, 10099 }; 10100 struct nfs4_secinfo_res res = { 10101 .flavors = flavors, 10102 }; 10103 struct rpc_message msg = { 10104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 10105 .rpc_argp = &args, 10106 .rpc_resp = &res, 10107 }; 10108 struct nfs4_call_sync_data data = { 10109 .seq_server = server, 10110 .seq_args = &args.seq_args, 10111 .seq_res = &res.seq_res, 10112 }; 10113 struct rpc_task_setup task_setup = { 10114 .rpc_client = server->client, 10115 .rpc_message = &msg, 10116 .callback_ops = server->nfs_client->cl_mvops->call_sync_ops, 10117 .callback_data = &data, 10118 .flags = RPC_TASK_NO_ROUND_ROBIN, 10119 }; 10120 const struct cred *cred = NULL; 10121 int status; 10122 10123 if (use_integrity) { 10124 task_setup.rpc_client = server->nfs_client->cl_rpcclient; 10125 10126 cred = nfs4_get_clid_cred(server->nfs_client); 10127 msg.rpc_cred = cred; 10128 } 10129 10130 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 0); 10131 status = nfs4_call_sync_custom(&task_setup); 10132 dprintk("<-- %s status=%d\n", __func__, status); 10133 10134 put_cred(cred); 10135 10136 return status; 10137} 10138 10139static int 10140nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 10141 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 10142{ 10143 struct nfs4_exception exception = { 10144 .interruptible = true, 10145 }; 10146 int err; 10147 do { 10148 /* first try using integrity protection */ 10149 err = -NFS4ERR_WRONGSEC; 10150 10151 /* try to use integrity protection with machine cred */ 10152 if (_nfs4_is_integrity_protected(server->nfs_client)) 10153 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 10154 flavors, true); 10155 10156 /* 10157 * if unable to use integrity protection, or SECINFO with 10158 * integrity protection returns NFS4ERR_WRONGSEC (which is 10159 * disallowed by spec, but exists in deployed servers) use 10160 * the current filesystem's rpc_client and the user cred. 10161 */ 10162 if (err == -NFS4ERR_WRONGSEC) 10163 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 10164 flavors, false); 10165 10166 switch (err) { 10167 case 0: 10168 case -NFS4ERR_WRONGSEC: 10169 case -ENOTSUPP: 10170 goto out; 10171 default: 10172 err = nfs4_handle_exception(server, err, &exception); 10173 } 10174 } while (exception.retry); 10175out: 10176 return err; 10177} 10178 10179static int 10180nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 10181 struct nfs_fsinfo *info) 10182{ 10183 int err; 10184 struct page *page; 10185 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 10186 struct nfs4_secinfo_flavors *flavors; 10187 struct nfs4_secinfo4 *secinfo; 10188 int i; 10189 10190 page = alloc_page(GFP_KERNEL); 10191 if (!page) { 10192 err = -ENOMEM; 10193 goto out; 10194 } 10195 10196 flavors = page_address(page); 10197 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 10198 10199 /* 10200 * Fall back on "guess and check" method if 10201 * the server doesn't support SECINFO_NO_NAME 10202 */ 10203 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 10204 err = nfs4_find_root_sec(server, fhandle, info); 10205 goto out_freepage; 10206 } 10207 if (err) 10208 goto out_freepage; 10209 10210 for (i = 0; i < flavors->num_flavors; i++) { 10211 secinfo = &flavors->flavors[i]; 10212 10213 switch (secinfo->flavor) { 10214 case RPC_AUTH_NULL: 10215 case RPC_AUTH_UNIX: 10216 case RPC_AUTH_GSS: 10217 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 10218 &secinfo->flavor_info); 10219 break; 10220 default: 10221 flavor = RPC_AUTH_MAXFLAVOR; 10222 break; 10223 } 10224 10225 if (!nfs_auth_info_match(&server->auth_info, flavor)) 10226 flavor = RPC_AUTH_MAXFLAVOR; 10227 10228 if (flavor != RPC_AUTH_MAXFLAVOR) { 10229 err = nfs4_lookup_root_sec(server, fhandle, 10230 info, flavor); 10231 if (!err) 10232 break; 10233 } 10234 } 10235 10236 if (flavor == RPC_AUTH_MAXFLAVOR) 10237 err = -EPERM; 10238 10239out_freepage: 10240 put_page(page); 10241 if (err == -EACCES) 10242 return -EPERM; 10243out: 10244 return err; 10245} 10246 10247static int _nfs41_test_stateid(struct nfs_server *server, 10248 nfs4_stateid *stateid, 10249 const struct cred *cred) 10250{ 10251 int status; 10252 struct nfs41_test_stateid_args args = { 10253 .stateid = stateid, 10254 }; 10255 struct nfs41_test_stateid_res res; 10256 struct rpc_message msg = { 10257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 10258 .rpc_argp = &args, 10259 .rpc_resp = &res, 10260 .rpc_cred = cred, 10261 }; 10262 struct rpc_clnt *rpc_client = server->client; 10263 10264 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10265 &rpc_client, &msg); 10266 10267 dprintk("NFS call test_stateid %p\n", stateid); 10268 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0, 1); 10269 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 10270 &args.seq_args, &res.seq_res); 10271 if (status != NFS_OK) { 10272 dprintk("NFS reply test_stateid: failed, %d\n", status); 10273 return status; 10274 } 10275 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 10276 return -res.status; 10277} 10278 10279static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 10280 int err, struct nfs4_exception *exception) 10281{ 10282 exception->retry = 0; 10283 switch(err) { 10284 case -NFS4ERR_DELAY: 10285 case -NFS4ERR_RETRY_UNCACHED_REP: 10286 nfs4_handle_exception(server, err, exception); 10287 break; 10288 case -NFS4ERR_BADSESSION: 10289 case -NFS4ERR_BADSLOT: 10290 case -NFS4ERR_BAD_HIGH_SLOT: 10291 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 10292 case -NFS4ERR_DEADSESSION: 10293 nfs4_do_handle_exception(server, err, exception); 10294 } 10295} 10296 10297/** 10298 * nfs41_test_stateid - perform a TEST_STATEID operation 10299 * 10300 * @server: server / transport on which to perform the operation 10301 * @stateid: state ID to test 10302 * @cred: credential 10303 * 10304 * Returns NFS_OK if the server recognizes that "stateid" is valid. 10305 * Otherwise a negative NFS4ERR value is returned if the operation 10306 * failed or the state ID is not currently valid. 10307 */ 10308static int nfs41_test_stateid(struct nfs_server *server, 10309 nfs4_stateid *stateid, 10310 const struct cred *cred) 10311{ 10312 struct nfs4_exception exception = { 10313 .interruptible = true, 10314 }; 10315 int err; 10316 do { 10317 err = _nfs41_test_stateid(server, stateid, cred); 10318 nfs4_handle_delay_or_session_error(server, err, &exception); 10319 } while (exception.retry); 10320 return err; 10321} 10322 10323struct nfs_free_stateid_data { 10324 struct nfs_server *server; 10325 struct nfs41_free_stateid_args args; 10326 struct nfs41_free_stateid_res res; 10327}; 10328 10329static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 10330{ 10331 struct nfs_free_stateid_data *data = calldata; 10332 nfs4_setup_sequence(data->server->nfs_client, 10333 &data->args.seq_args, 10334 &data->res.seq_res, 10335 task); 10336} 10337 10338static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 10339{ 10340 struct nfs_free_stateid_data *data = calldata; 10341 10342 nfs41_sequence_done(task, &data->res.seq_res); 10343 10344 switch (task->tk_status) { 10345 case -NFS4ERR_DELAY: 10346 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 10347 rpc_restart_call_prepare(task); 10348 } 10349} 10350 10351static void nfs41_free_stateid_release(void *calldata) 10352{ 10353 struct nfs_free_stateid_data *data = calldata; 10354 struct nfs_client *clp = data->server->nfs_client; 10355 10356 nfs_put_client(clp); 10357 kfree(calldata); 10358} 10359 10360static const struct rpc_call_ops nfs41_free_stateid_ops = { 10361 .rpc_call_prepare = nfs41_free_stateid_prepare, 10362 .rpc_call_done = nfs41_free_stateid_done, 10363 .rpc_release = nfs41_free_stateid_release, 10364}; 10365 10366/** 10367 * nfs41_free_stateid - perform a FREE_STATEID operation 10368 * 10369 * @server: server / transport on which to perform the operation 10370 * @stateid: state ID to release 10371 * @cred: credential 10372 * @privileged: set to true if this call needs to be privileged 10373 * 10374 * Note: this function is always asynchronous. 10375 */ 10376static int nfs41_free_stateid(struct nfs_server *server, 10377 const nfs4_stateid *stateid, 10378 const struct cred *cred, 10379 bool privileged) 10380{ 10381 struct rpc_message msg = { 10382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 10383 .rpc_cred = cred, 10384 }; 10385 struct rpc_task_setup task_setup = { 10386 .rpc_client = server->client, 10387 .rpc_message = &msg, 10388 .callback_ops = &nfs41_free_stateid_ops, 10389 .flags = RPC_TASK_ASYNC | RPC_TASK_MOVEABLE, 10390 }; 10391 struct nfs_free_stateid_data *data; 10392 struct rpc_task *task; 10393 struct nfs_client *clp = server->nfs_client; 10394 10395 if (!refcount_inc_not_zero(&clp->cl_count)) 10396 return -EIO; 10397 10398 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 10399 &task_setup.rpc_client, &msg); 10400 10401 dprintk("NFS call free_stateid %p\n", stateid); 10402 data = kmalloc(sizeof(*data), GFP_KERNEL); 10403 if (!data) 10404 return -ENOMEM; 10405 data->server = server; 10406 nfs4_stateid_copy(&data->args.stateid, stateid); 10407 10408 task_setup.callback_data = data; 10409 10410 msg.rpc_argp = &data->args; 10411 msg.rpc_resp = &data->res; 10412 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1, privileged); 10413 task = rpc_run_task(&task_setup); 10414 if (IS_ERR(task)) 10415 return PTR_ERR(task); 10416 rpc_put_task(task); 10417 return 0; 10418} 10419 10420static void 10421nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 10422{ 10423 const struct cred *cred = lsp->ls_state->owner->so_cred; 10424 10425 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 10426 nfs4_free_lock_state(server, lsp); 10427} 10428 10429static bool nfs41_match_stateid(const nfs4_stateid *s1, 10430 const nfs4_stateid *s2) 10431{ 10432 if (s1->type != s2->type) 10433 return false; 10434 10435 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 10436 return false; 10437 10438 if (s1->seqid == s2->seqid) 10439 return true; 10440 10441 return s1->seqid == 0 || s2->seqid == 0; 10442} 10443 10444#endif /* CONFIG_NFS_V4_1 */ 10445 10446static bool nfs4_match_stateid(const nfs4_stateid *s1, 10447 const nfs4_stateid *s2) 10448{ 10449 return nfs4_stateid_match(s1, s2); 10450} 10451 10452 10453static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 10454 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10455 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10456 .recover_open = nfs4_open_reclaim, 10457 .recover_lock = nfs4_lock_reclaim, 10458 .establish_clid = nfs4_init_clientid, 10459 .detect_trunking = nfs40_discover_server_trunking, 10460}; 10461 10462#if defined(CONFIG_NFS_V4_1) 10463static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 10464 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 10465 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 10466 .recover_open = nfs4_open_reclaim, 10467 .recover_lock = nfs4_lock_reclaim, 10468 .establish_clid = nfs41_init_clientid, 10469 .reclaim_complete = nfs41_proc_reclaim_complete, 10470 .detect_trunking = nfs41_discover_server_trunking, 10471}; 10472#endif /* CONFIG_NFS_V4_1 */ 10473 10474static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 10475 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10476 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10477 .recover_open = nfs40_open_expired, 10478 .recover_lock = nfs4_lock_expired, 10479 .establish_clid = nfs4_init_clientid, 10480}; 10481 10482#if defined(CONFIG_NFS_V4_1) 10483static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 10484 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 10485 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 10486 .recover_open = nfs41_open_expired, 10487 .recover_lock = nfs41_lock_expired, 10488 .establish_clid = nfs41_init_clientid, 10489}; 10490#endif /* CONFIG_NFS_V4_1 */ 10491 10492static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 10493 .sched_state_renewal = nfs4_proc_async_renew, 10494 .get_state_renewal_cred = nfs4_get_renew_cred, 10495 .renew_lease = nfs4_proc_renew, 10496}; 10497 10498#if defined(CONFIG_NFS_V4_1) 10499static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 10500 .sched_state_renewal = nfs41_proc_async_sequence, 10501 .get_state_renewal_cred = nfs4_get_machine_cred, 10502 .renew_lease = nfs4_proc_sequence, 10503}; 10504#endif 10505 10506static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 10507 .get_locations = _nfs40_proc_get_locations, 10508 .fsid_present = _nfs40_proc_fsid_present, 10509}; 10510 10511#if defined(CONFIG_NFS_V4_1) 10512static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 10513 .get_locations = _nfs41_proc_get_locations, 10514 .fsid_present = _nfs41_proc_fsid_present, 10515}; 10516#endif /* CONFIG_NFS_V4_1 */ 10517 10518static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 10519 .minor_version = 0, 10520 .init_caps = NFS_CAP_READDIRPLUS 10521 | NFS_CAP_ATOMIC_OPEN 10522 | NFS_CAP_POSIX_LOCK, 10523 .init_client = nfs40_init_client, 10524 .shutdown_client = nfs40_shutdown_client, 10525 .match_stateid = nfs4_match_stateid, 10526 .find_root_sec = nfs4_find_root_sec, 10527 .free_lock_state = nfs4_release_lockowner, 10528 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 10529 .alloc_seqid = nfs_alloc_seqid, 10530 .call_sync_ops = &nfs40_call_sync_ops, 10531 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 10532 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 10533 .state_renewal_ops = &nfs40_state_renewal_ops, 10534 .mig_recovery_ops = &nfs40_mig_recovery_ops, 10535}; 10536 10537#if defined(CONFIG_NFS_V4_1) 10538static struct nfs_seqid * 10539nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 10540{ 10541 return NULL; 10542} 10543 10544static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 10545 .minor_version = 1, 10546 .init_caps = NFS_CAP_READDIRPLUS 10547 | NFS_CAP_ATOMIC_OPEN 10548 | NFS_CAP_POSIX_LOCK 10549 | NFS_CAP_STATEID_NFSV41 10550 | NFS_CAP_ATOMIC_OPEN_V1 10551 | NFS_CAP_LGOPEN 10552 | NFS_CAP_MOVEABLE, 10553 .init_client = nfs41_init_client, 10554 .shutdown_client = nfs41_shutdown_client, 10555 .match_stateid = nfs41_match_stateid, 10556 .find_root_sec = nfs41_find_root_sec, 10557 .free_lock_state = nfs41_free_lock_state, 10558 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10559 .alloc_seqid = nfs_alloc_no_seqid, 10560 .session_trunk = nfs4_test_session_trunk, 10561 .call_sync_ops = &nfs41_call_sync_ops, 10562 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10563 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10564 .state_renewal_ops = &nfs41_state_renewal_ops, 10565 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10566}; 10567#endif 10568 10569#if defined(CONFIG_NFS_V4_2) 10570static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 10571 .minor_version = 2, 10572 .init_caps = NFS_CAP_READDIRPLUS 10573 | NFS_CAP_ATOMIC_OPEN 10574 | NFS_CAP_POSIX_LOCK 10575 | NFS_CAP_STATEID_NFSV41 10576 | NFS_CAP_ATOMIC_OPEN_V1 10577 | NFS_CAP_LGOPEN 10578 | NFS_CAP_ALLOCATE 10579 | NFS_CAP_COPY 10580 | NFS_CAP_OFFLOAD_CANCEL 10581 | NFS_CAP_COPY_NOTIFY 10582 | NFS_CAP_DEALLOCATE 10583 | NFS_CAP_SEEK 10584 | NFS_CAP_LAYOUTSTATS 10585 | NFS_CAP_CLONE 10586 | NFS_CAP_LAYOUTERROR 10587 | NFS_CAP_READ_PLUS 10588 | NFS_CAP_MOVEABLE, 10589 .init_client = nfs41_init_client, 10590 .shutdown_client = nfs41_shutdown_client, 10591 .match_stateid = nfs41_match_stateid, 10592 .find_root_sec = nfs41_find_root_sec, 10593 .free_lock_state = nfs41_free_lock_state, 10594 .call_sync_ops = &nfs41_call_sync_ops, 10595 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 10596 .alloc_seqid = nfs_alloc_no_seqid, 10597 .session_trunk = nfs4_test_session_trunk, 10598 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 10599 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 10600 .state_renewal_ops = &nfs41_state_renewal_ops, 10601 .mig_recovery_ops = &nfs41_mig_recovery_ops, 10602}; 10603#endif 10604 10605const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 10606 [0] = &nfs_v4_0_minor_ops, 10607#if defined(CONFIG_NFS_V4_1) 10608 [1] = &nfs_v4_1_minor_ops, 10609#endif 10610#if defined(CONFIG_NFS_V4_2) 10611 [2] = &nfs_v4_2_minor_ops, 10612#endif 10613}; 10614 10615static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 10616{ 10617 ssize_t error, error2, error3; 10618 size_t left = size; 10619 10620 error = generic_listxattr(dentry, list, left); 10621 if (error < 0) 10622 return error; 10623 if (list) { 10624 list += error; 10625 left -= error; 10626 } 10627 10628 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, left); 10629 if (error2 < 0) 10630 return error2; 10631 10632 if (list) { 10633 list += error2; 10634 left -= error2; 10635 } 10636 10637 error3 = nfs4_listxattr_nfs4_user(d_inode(dentry), list, left); 10638 if (error3 < 0) 10639 return error3; 10640 10641 error += error2 + error3; 10642 if (size && error > size) 10643 return -ERANGE; 10644 return error; 10645} 10646 10647static void nfs4_enable_swap(struct inode *inode) 10648{ 10649 /* The state manager thread must always be running. 10650 * It will notice the client is a swapper, and stay put. 10651 */ 10652 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 10653 10654 nfs4_schedule_state_manager(clp); 10655} 10656 10657static void nfs4_disable_swap(struct inode *inode) 10658{ 10659 /* The state manager thread will now exit once it is 10660 * woken. 10661 */ 10662 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 10663 10664 set_bit(NFS4CLNT_RUN_MANAGER, &clp->cl_state); 10665 clear_bit(NFS4CLNT_MANAGER_AVAILABLE, &clp->cl_state); 10666 wake_up_var(&clp->cl_state); 10667} 10668 10669static const struct inode_operations nfs4_dir_inode_operations = { 10670 .create = nfs_create, 10671 .lookup = nfs_lookup, 10672 .atomic_open = nfs_atomic_open, 10673 .link = nfs_link, 10674 .unlink = nfs_unlink, 10675 .symlink = nfs_symlink, 10676 .mkdir = nfs_mkdir, 10677 .rmdir = nfs_rmdir, 10678 .mknod = nfs_mknod, 10679 .rename = nfs_rename, 10680 .permission = nfs_permission, 10681 .getattr = nfs_getattr, 10682 .setattr = nfs_setattr, 10683 .listxattr = nfs4_listxattr, 10684}; 10685 10686static const struct inode_operations nfs4_file_inode_operations = { 10687 .permission = nfs_permission, 10688 .getattr = nfs_getattr, 10689 .setattr = nfs_setattr, 10690 .listxattr = nfs4_listxattr, 10691}; 10692 10693const struct nfs_rpc_ops nfs_v4_clientops = { 10694 .version = 4, /* protocol version */ 10695 .dentry_ops = &nfs4_dentry_operations, 10696 .dir_inode_ops = &nfs4_dir_inode_operations, 10697 .file_inode_ops = &nfs4_file_inode_operations, 10698 .file_ops = &nfs4_file_operations, 10699 .getroot = nfs4_proc_get_root, 10700 .submount = nfs4_submount, 10701 .try_get_tree = nfs4_try_get_tree, 10702 .getattr = nfs4_proc_getattr, 10703 .setattr = nfs4_proc_setattr, 10704 .lookup = nfs4_proc_lookup, 10705 .lookupp = nfs4_proc_lookupp, 10706 .access = nfs4_proc_access, 10707 .readlink = nfs4_proc_readlink, 10708 .create = nfs4_proc_create, 10709 .remove = nfs4_proc_remove, 10710 .unlink_setup = nfs4_proc_unlink_setup, 10711 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 10712 .unlink_done = nfs4_proc_unlink_done, 10713 .rename_setup = nfs4_proc_rename_setup, 10714 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 10715 .rename_done = nfs4_proc_rename_done, 10716 .link = nfs4_proc_link, 10717 .symlink = nfs4_proc_symlink, 10718 .mkdir = nfs4_proc_mkdir, 10719 .rmdir = nfs4_proc_rmdir, 10720 .readdir = nfs4_proc_readdir, 10721 .mknod = nfs4_proc_mknod, 10722 .statfs = nfs4_proc_statfs, 10723 .fsinfo = nfs4_proc_fsinfo, 10724 .pathconf = nfs4_proc_pathconf, 10725 .set_capabilities = nfs4_server_capabilities, 10726 .decode_dirent = nfs4_decode_dirent, 10727 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 10728 .read_setup = nfs4_proc_read_setup, 10729 .read_done = nfs4_read_done, 10730 .write_setup = nfs4_proc_write_setup, 10731 .write_done = nfs4_write_done, 10732 .commit_setup = nfs4_proc_commit_setup, 10733 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 10734 .commit_done = nfs4_commit_done, 10735 .lock = nfs4_proc_lock, 10736 .clear_acl_cache = nfs4_zap_acl_attr, 10737 .close_context = nfs4_close_context, 10738 .open_context = nfs4_atomic_open, 10739 .have_delegation = nfs4_have_delegation, 10740 .alloc_client = nfs4_alloc_client, 10741 .init_client = nfs4_init_client, 10742 .free_client = nfs4_free_client, 10743 .create_server = nfs4_create_server, 10744 .clone_server = nfs_clone_server, 10745 .discover_trunking = nfs4_discover_trunking, 10746 .enable_swap = nfs4_enable_swap, 10747 .disable_swap = nfs4_disable_swap, 10748}; 10749 10750static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 10751 .name = XATTR_NAME_NFSV4_ACL, 10752 .list = nfs4_xattr_list_nfs4_acl, 10753 .get = nfs4_xattr_get_nfs4_acl, 10754 .set = nfs4_xattr_set_nfs4_acl, 10755}; 10756 10757#if defined(CONFIG_NFS_V4_1) 10758static const struct xattr_handler nfs4_xattr_nfs4_dacl_handler = { 10759 .name = XATTR_NAME_NFSV4_DACL, 10760 .list = nfs4_xattr_list_nfs4_dacl, 10761 .get = nfs4_xattr_get_nfs4_dacl, 10762 .set = nfs4_xattr_set_nfs4_dacl, 10763}; 10764 10765static const struct xattr_handler nfs4_xattr_nfs4_sacl_handler = { 10766 .name = XATTR_NAME_NFSV4_SACL, 10767 .list = nfs4_xattr_list_nfs4_sacl, 10768 .get = nfs4_xattr_get_nfs4_sacl, 10769 .set = nfs4_xattr_set_nfs4_sacl, 10770}; 10771#endif 10772 10773#ifdef CONFIG_NFS_V4_2 10774static const struct xattr_handler nfs4_xattr_nfs4_user_handler = { 10775 .prefix = XATTR_USER_PREFIX, 10776 .get = nfs4_xattr_get_nfs4_user, 10777 .set = nfs4_xattr_set_nfs4_user, 10778}; 10779#endif 10780 10781const struct xattr_handler * const nfs4_xattr_handlers[] = { 10782 &nfs4_xattr_nfs4_acl_handler, 10783#if defined(CONFIG_NFS_V4_1) 10784 &nfs4_xattr_nfs4_dacl_handler, 10785 &nfs4_xattr_nfs4_sacl_handler, 10786#endif 10787#ifdef CONFIG_NFS_V4_SECURITY_LABEL 10788 &nfs4_xattr_nfs4_label_handler, 10789#endif 10790#ifdef CONFIG_NFS_V4_2 10791 &nfs4_xattr_nfs4_user_handler, 10792#endif 10793 NULL 10794}; 10795