1/* 2 * Server-side XDR for NFSv4 3 * 4 * Copyright (c) 2002 The Regents of the University of Michigan. 5 * All rights reserved. 6 * 7 * Kendrick Smith <kmsmith@umich.edu> 8 * Andy Adamson <andros@umich.edu> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 * 35 * TODO: Neil Brown made the following observation: We currently 36 * initially reserve NFSD_BUFSIZE space on the transmit queue and 37 * never release any of that until the request is complete. 38 * It would be good to calculate a new maximum response size while 39 * decoding the COMPOUND, and call svc_reserve with this number 40 * at the end of nfs4svc_decode_compoundargs. 41 */ 42 43#include <linux/slab.h> 44#include <linux/namei.h> 45#include <linux/statfs.h> 46#include <linux/utsname.h> 47#include <linux/nfsd_idmap.h> 48#include <linux/nfs4_acl.h> 49#include <linux/sunrpc/svcauth_gss.h> 50 51#include "xdr4.h" 52#include "vfs.h" 53 54#define NFSDDBG_FACILITY NFSDDBG_XDR 55 56/* 57 * As per referral draft, the fsid for a referral MUST be different from the fsid of the containing 58 * directory in order to indicate to the client that a filesystem boundary is present 59 * We use a fixed fsid for a referral 60 */ 61#define NFS4_REFERRAL_FSID_MAJOR 0x8000000ULL 62#define NFS4_REFERRAL_FSID_MINOR 0x8000000ULL 63 64static __be32 65check_filename(char *str, int len, __be32 err) 66{ 67 int i; 68 69 if (len == 0) 70 return nfserr_inval; 71 if (isdotent(str, len)) 72 return err; 73 for (i = 0; i < len; i++) 74 if (str[i] == '/') 75 return err; 76 return 0; 77} 78 79#define DECODE_HEAD \ 80 __be32 *p; \ 81 __be32 status 82#define DECODE_TAIL \ 83 status = 0; \ 84out: \ 85 return status; \ 86xdr_error: \ 87 dprintk("NFSD: xdr error (%s:%d)\n", \ 88 __FILE__, __LINE__); \ 89 status = nfserr_bad_xdr; \ 90 goto out 91 92#define READ32(x) (x) = ntohl(*p++) 93#define READ64(x) do { \ 94 (x) = (u64)ntohl(*p++) << 32; \ 95 (x) |= ntohl(*p++); \ 96} while (0) 97#define READTIME(x) do { \ 98 p++; \ 99 (x) = ntohl(*p++); \ 100 p++; \ 101} while (0) 102#define READMEM(x,nbytes) do { \ 103 x = (char *)p; \ 104 p += XDR_QUADLEN(nbytes); \ 105} while (0) 106#define SAVEMEM(x,nbytes) do { \ 107 if (!(x = (p==argp->tmp || p == argp->tmpp) ? \ 108 savemem(argp, p, nbytes) : \ 109 (char *)p)) { \ 110 dprintk("NFSD: xdr error (%s:%d)\n", \ 111 __FILE__, __LINE__); \ 112 goto xdr_error; \ 113 } \ 114 p += XDR_QUADLEN(nbytes); \ 115} while (0) 116#define COPYMEM(x,nbytes) do { \ 117 memcpy((x), p, nbytes); \ 118 p += XDR_QUADLEN(nbytes); \ 119} while (0) 120 121/* READ_BUF, read_buf(): nbytes must be <= PAGE_SIZE */ 122#define READ_BUF(nbytes) do { \ 123 if (nbytes <= (u32)((char *)argp->end - (char *)argp->p)) { \ 124 p = argp->p; \ 125 argp->p += XDR_QUADLEN(nbytes); \ 126 } else if (!(p = read_buf(argp, nbytes))) { \ 127 dprintk("NFSD: xdr error (%s:%d)\n", \ 128 __FILE__, __LINE__); \ 129 goto xdr_error; \ 130 } \ 131} while (0) 132 133static __be32 *read_buf(struct nfsd4_compoundargs *argp, u32 nbytes) 134{ 135 /* We want more bytes than seem to be available. 136 * Maybe we need a new page, maybe we have just run out 137 */ 138 unsigned int avail = (char *)argp->end - (char *)argp->p; 139 __be32 *p; 140 if (avail + argp->pagelen < nbytes) 141 return NULL; 142 if (avail + PAGE_SIZE < nbytes) /* need more than a page !! */ 143 return NULL; 144 /* ok, we can do it with the current plus the next page */ 145 if (nbytes <= sizeof(argp->tmp)) 146 p = argp->tmp; 147 else { 148 kfree(argp->tmpp); 149 p = argp->tmpp = kmalloc(nbytes, GFP_KERNEL); 150 if (!p) 151 return NULL; 152 153 } 154 /* 155 * The following memcpy is safe because read_buf is always 156 * called with nbytes > avail, and the two cases above both 157 * guarantee p points to at least nbytes bytes. 158 */ 159 memcpy(p, argp->p, avail); 160 /* step to next page */ 161 argp->p = page_address(argp->pagelist[0]); 162 argp->pagelist++; 163 if (argp->pagelen < PAGE_SIZE) { 164 argp->end = argp->p + (argp->pagelen>>2); 165 argp->pagelen = 0; 166 } else { 167 argp->end = argp->p + (PAGE_SIZE>>2); 168 argp->pagelen -= PAGE_SIZE; 169 } 170 memcpy(((char*)p)+avail, argp->p, (nbytes - avail)); 171 argp->p += XDR_QUADLEN(nbytes - avail); 172 return p; 173} 174 175static int zero_clientid(clientid_t *clid) 176{ 177 return (clid->cl_boot == 0) && (clid->cl_id == 0); 178} 179 180static int 181defer_free(struct nfsd4_compoundargs *argp, 182 void (*release)(const void *), void *p) 183{ 184 struct tmpbuf *tb; 185 186 tb = kmalloc(sizeof(*tb), GFP_KERNEL); 187 if (!tb) 188 return -ENOMEM; 189 tb->buf = p; 190 tb->release = release; 191 tb->next = argp->to_free; 192 argp->to_free = tb; 193 return 0; 194} 195 196static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes) 197{ 198 if (p == argp->tmp) { 199 p = kmalloc(nbytes, GFP_KERNEL); 200 if (!p) 201 return NULL; 202 memcpy(p, argp->tmp, nbytes); 203 } else { 204 BUG_ON(p != argp->tmpp); 205 argp->tmpp = NULL; 206 } 207 if (defer_free(argp, kfree, p)) { 208 kfree(p); 209 return NULL; 210 } else 211 return (char *)p; 212} 213 214static __be32 215nfsd4_decode_bitmap(struct nfsd4_compoundargs *argp, u32 *bmval) 216{ 217 u32 bmlen; 218 DECODE_HEAD; 219 220 bmval[0] = 0; 221 bmval[1] = 0; 222 bmval[2] = 0; 223 224 READ_BUF(4); 225 READ32(bmlen); 226 if (bmlen > 1000) 227 goto xdr_error; 228 229 READ_BUF(bmlen << 2); 230 if (bmlen > 0) 231 READ32(bmval[0]); 232 if (bmlen > 1) 233 READ32(bmval[1]); 234 if (bmlen > 2) 235 READ32(bmval[2]); 236 237 DECODE_TAIL; 238} 239 240static __be32 241nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval, 242 struct iattr *iattr, struct nfs4_acl **acl) 243{ 244 int expected_len, len = 0; 245 u32 dummy32; 246 char *buf; 247 int host_err; 248 249 DECODE_HEAD; 250 iattr->ia_valid = 0; 251 if ((status = nfsd4_decode_bitmap(argp, bmval))) 252 return status; 253 254 READ_BUF(4); 255 READ32(expected_len); 256 257 if (bmval[0] & FATTR4_WORD0_SIZE) { 258 READ_BUF(8); 259 len += 8; 260 READ64(iattr->ia_size); 261 iattr->ia_valid |= ATTR_SIZE; 262 } 263 if (bmval[0] & FATTR4_WORD0_ACL) { 264 int nace; 265 struct nfs4_ace *ace; 266 267 READ_BUF(4); len += 4; 268 READ32(nace); 269 270 if (nace > NFS4_ACL_MAX) 271 return nfserr_resource; 272 273 *acl = nfs4_acl_new(nace); 274 if (*acl == NULL) { 275 host_err = -ENOMEM; 276 goto out_nfserr; 277 } 278 defer_free(argp, kfree, *acl); 279 280 (*acl)->naces = nace; 281 for (ace = (*acl)->aces; ace < (*acl)->aces + nace; ace++) { 282 READ_BUF(16); len += 16; 283 READ32(ace->type); 284 READ32(ace->flag); 285 READ32(ace->access_mask); 286 READ32(dummy32); 287 READ_BUF(dummy32); 288 len += XDR_QUADLEN(dummy32) << 2; 289 READMEM(buf, dummy32); 290 ace->whotype = nfs4_acl_get_whotype(buf, dummy32); 291 host_err = 0; 292 if (ace->whotype != NFS4_ACL_WHO_NAMED) 293 ace->who = 0; 294 else if (ace->flag & NFS4_ACE_IDENTIFIER_GROUP) 295 host_err = nfsd_map_name_to_gid(argp->rqstp, 296 buf, dummy32, &ace->who); 297 else 298 host_err = nfsd_map_name_to_uid(argp->rqstp, 299 buf, dummy32, &ace->who); 300 if (host_err) 301 goto out_nfserr; 302 } 303 } else 304 *acl = NULL; 305 if (bmval[1] & FATTR4_WORD1_MODE) { 306 READ_BUF(4); 307 len += 4; 308 READ32(iattr->ia_mode); 309 iattr->ia_mode &= (S_IFMT | S_IALLUGO); 310 iattr->ia_valid |= ATTR_MODE; 311 } 312 if (bmval[1] & FATTR4_WORD1_OWNER) { 313 READ_BUF(4); 314 len += 4; 315 READ32(dummy32); 316 READ_BUF(dummy32); 317 len += (XDR_QUADLEN(dummy32) << 2); 318 READMEM(buf, dummy32); 319 if ((host_err = nfsd_map_name_to_uid(argp->rqstp, buf, dummy32, &iattr->ia_uid))) 320 goto out_nfserr; 321 iattr->ia_valid |= ATTR_UID; 322 } 323 if (bmval[1] & FATTR4_WORD1_OWNER_GROUP) { 324 READ_BUF(4); 325 len += 4; 326 READ32(dummy32); 327 READ_BUF(dummy32); 328 len += (XDR_QUADLEN(dummy32) << 2); 329 READMEM(buf, dummy32); 330 if ((host_err = nfsd_map_name_to_gid(argp->rqstp, buf, dummy32, &iattr->ia_gid))) 331 goto out_nfserr; 332 iattr->ia_valid |= ATTR_GID; 333 } 334 if (bmval[1] & FATTR4_WORD1_TIME_ACCESS_SET) { 335 READ_BUF(4); 336 len += 4; 337 READ32(dummy32); 338 switch (dummy32) { 339 case NFS4_SET_TO_CLIENT_TIME: 340 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 341 all 32 bits of 'nseconds'. */ 342 READ_BUF(12); 343 len += 12; 344 READ32(dummy32); 345 if (dummy32) 346 return nfserr_inval; 347 READ32(iattr->ia_atime.tv_sec); 348 READ32(iattr->ia_atime.tv_nsec); 349 if (iattr->ia_atime.tv_nsec >= (u32)1000000000) 350 return nfserr_inval; 351 iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); 352 break; 353 case NFS4_SET_TO_SERVER_TIME: 354 iattr->ia_valid |= ATTR_ATIME; 355 break; 356 default: 357 goto xdr_error; 358 } 359 } 360 if (bmval[1] & FATTR4_WORD1_TIME_MODIFY_SET) { 361 READ_BUF(4); 362 len += 4; 363 READ32(dummy32); 364 switch (dummy32) { 365 case NFS4_SET_TO_CLIENT_TIME: 366 /* We require the high 32 bits of 'seconds' to be 0, and we ignore 367 all 32 bits of 'nseconds'. */ 368 READ_BUF(12); 369 len += 12; 370 READ32(dummy32); 371 if (dummy32) 372 return nfserr_inval; 373 READ32(iattr->ia_mtime.tv_sec); 374 READ32(iattr->ia_mtime.tv_nsec); 375 if (iattr->ia_mtime.tv_nsec >= (u32)1000000000) 376 return nfserr_inval; 377 iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); 378 break; 379 case NFS4_SET_TO_SERVER_TIME: 380 iattr->ia_valid |= ATTR_MTIME; 381 break; 382 default: 383 goto xdr_error; 384 } 385 } 386 if (bmval[0] & ~NFSD_WRITEABLE_ATTRS_WORD0 387 || bmval[1] & ~NFSD_WRITEABLE_ATTRS_WORD1 388 || bmval[2] & ~NFSD_WRITEABLE_ATTRS_WORD2) 389 READ_BUF(expected_len - len); 390 else if (len != expected_len) 391 goto xdr_error; 392 393 DECODE_TAIL; 394 395out_nfserr: 396 status = nfserrno(host_err); 397 goto out; 398} 399 400static __be32 401nfsd4_decode_stateid(struct nfsd4_compoundargs *argp, stateid_t *sid) 402{ 403 DECODE_HEAD; 404 405 READ_BUF(sizeof(stateid_t)); 406 READ32(sid->si_generation); 407 COPYMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 408 409 DECODE_TAIL; 410} 411 412static __be32 413nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access) 414{ 415 DECODE_HEAD; 416 417 READ_BUF(4); 418 READ32(access->ac_req_access); 419 420 DECODE_TAIL; 421} 422 423static __be32 424nfsd4_decode_close(struct nfsd4_compoundargs *argp, struct nfsd4_close *close) 425{ 426 DECODE_HEAD; 427 428 close->cl_stateowner = NULL; 429 READ_BUF(4); 430 READ32(close->cl_seqid); 431 return nfsd4_decode_stateid(argp, &close->cl_stateid); 432 433 DECODE_TAIL; 434} 435 436 437static __be32 438nfsd4_decode_commit(struct nfsd4_compoundargs *argp, struct nfsd4_commit *commit) 439{ 440 DECODE_HEAD; 441 442 READ_BUF(12); 443 READ64(commit->co_offset); 444 READ32(commit->co_count); 445 446 DECODE_TAIL; 447} 448 449static __be32 450nfsd4_decode_create(struct nfsd4_compoundargs *argp, struct nfsd4_create *create) 451{ 452 DECODE_HEAD; 453 454 READ_BUF(4); 455 READ32(create->cr_type); 456 switch (create->cr_type) { 457 case NF4LNK: 458 READ_BUF(4); 459 READ32(create->cr_linklen); 460 READ_BUF(create->cr_linklen); 461 SAVEMEM(create->cr_linkname, create->cr_linklen); 462 break; 463 case NF4BLK: 464 case NF4CHR: 465 READ_BUF(8); 466 READ32(create->cr_specdata1); 467 READ32(create->cr_specdata2); 468 break; 469 case NF4SOCK: 470 case NF4FIFO: 471 case NF4DIR: 472 default: 473 break; 474 } 475 476 READ_BUF(4); 477 READ32(create->cr_namelen); 478 READ_BUF(create->cr_namelen); 479 SAVEMEM(create->cr_name, create->cr_namelen); 480 if ((status = check_filename(create->cr_name, create->cr_namelen, nfserr_inval))) 481 return status; 482 483 status = nfsd4_decode_fattr(argp, create->cr_bmval, &create->cr_iattr, 484 &create->cr_acl); 485 if (status) 486 goto out; 487 488 DECODE_TAIL; 489} 490 491static inline __be32 492nfsd4_decode_delegreturn(struct nfsd4_compoundargs *argp, struct nfsd4_delegreturn *dr) 493{ 494 return nfsd4_decode_stateid(argp, &dr->dr_stateid); 495} 496 497static inline __be32 498nfsd4_decode_getattr(struct nfsd4_compoundargs *argp, struct nfsd4_getattr *getattr) 499{ 500 return nfsd4_decode_bitmap(argp, getattr->ga_bmval); 501} 502 503static __be32 504nfsd4_decode_link(struct nfsd4_compoundargs *argp, struct nfsd4_link *link) 505{ 506 DECODE_HEAD; 507 508 READ_BUF(4); 509 READ32(link->li_namelen); 510 READ_BUF(link->li_namelen); 511 SAVEMEM(link->li_name, link->li_namelen); 512 if ((status = check_filename(link->li_name, link->li_namelen, nfserr_inval))) 513 return status; 514 515 DECODE_TAIL; 516} 517 518static __be32 519nfsd4_decode_lock(struct nfsd4_compoundargs *argp, struct nfsd4_lock *lock) 520{ 521 DECODE_HEAD; 522 523 lock->lk_replay_owner = NULL; 524 /* 525 * type, reclaim(boolean), offset, length, new_lock_owner(boolean) 526 */ 527 READ_BUF(28); 528 READ32(lock->lk_type); 529 if ((lock->lk_type < NFS4_READ_LT) || (lock->lk_type > NFS4_WRITEW_LT)) 530 goto xdr_error; 531 READ32(lock->lk_reclaim); 532 READ64(lock->lk_offset); 533 READ64(lock->lk_length); 534 READ32(lock->lk_is_new); 535 536 if (lock->lk_is_new) { 537 READ_BUF(4); 538 READ32(lock->lk_new_open_seqid); 539 status = nfsd4_decode_stateid(argp, &lock->lk_new_open_stateid); 540 if (status) 541 return status; 542 READ_BUF(8 + sizeof(clientid_t)); 543 READ32(lock->lk_new_lock_seqid); 544 COPYMEM(&lock->lk_new_clientid, sizeof(clientid_t)); 545 READ32(lock->lk_new_owner.len); 546 READ_BUF(lock->lk_new_owner.len); 547 READMEM(lock->lk_new_owner.data, lock->lk_new_owner.len); 548 } else { 549 status = nfsd4_decode_stateid(argp, &lock->lk_old_lock_stateid); 550 if (status) 551 return status; 552 READ_BUF(4); 553 READ32(lock->lk_old_lock_seqid); 554 } 555 556 DECODE_TAIL; 557} 558 559static __be32 560nfsd4_decode_lockt(struct nfsd4_compoundargs *argp, struct nfsd4_lockt *lockt) 561{ 562 DECODE_HEAD; 563 564 READ_BUF(32); 565 READ32(lockt->lt_type); 566 if((lockt->lt_type < NFS4_READ_LT) || (lockt->lt_type > NFS4_WRITEW_LT)) 567 goto xdr_error; 568 READ64(lockt->lt_offset); 569 READ64(lockt->lt_length); 570 COPYMEM(&lockt->lt_clientid, 8); 571 READ32(lockt->lt_owner.len); 572 READ_BUF(lockt->lt_owner.len); 573 READMEM(lockt->lt_owner.data, lockt->lt_owner.len); 574 575 if (argp->minorversion && !zero_clientid(&lockt->lt_clientid)) 576 return nfserr_inval; 577 DECODE_TAIL; 578} 579 580static __be32 581nfsd4_decode_locku(struct nfsd4_compoundargs *argp, struct nfsd4_locku *locku) 582{ 583 DECODE_HEAD; 584 585 locku->lu_stateowner = NULL; 586 READ_BUF(8); 587 READ32(locku->lu_type); 588 if ((locku->lu_type < NFS4_READ_LT) || (locku->lu_type > NFS4_WRITEW_LT)) 589 goto xdr_error; 590 READ32(locku->lu_seqid); 591 status = nfsd4_decode_stateid(argp, &locku->lu_stateid); 592 if (status) 593 return status; 594 READ_BUF(16); 595 READ64(locku->lu_offset); 596 READ64(locku->lu_length); 597 598 DECODE_TAIL; 599} 600 601static __be32 602nfsd4_decode_lookup(struct nfsd4_compoundargs *argp, struct nfsd4_lookup *lookup) 603{ 604 DECODE_HEAD; 605 606 READ_BUF(4); 607 READ32(lookup->lo_len); 608 READ_BUF(lookup->lo_len); 609 SAVEMEM(lookup->lo_name, lookup->lo_len); 610 if ((status = check_filename(lookup->lo_name, lookup->lo_len, nfserr_noent))) 611 return status; 612 613 DECODE_TAIL; 614} 615 616static __be32 617nfsd4_decode_open(struct nfsd4_compoundargs *argp, struct nfsd4_open *open) 618{ 619 DECODE_HEAD; 620 621 memset(open->op_bmval, 0, sizeof(open->op_bmval)); 622 open->op_iattr.ia_valid = 0; 623 open->op_stateowner = NULL; 624 625 /* seqid, share_access, share_deny, clientid, ownerlen */ 626 READ_BUF(16 + sizeof(clientid_t)); 627 READ32(open->op_seqid); 628 READ32(open->op_share_access); 629 READ32(open->op_share_deny); 630 COPYMEM(&open->op_clientid, sizeof(clientid_t)); 631 READ32(open->op_owner.len); 632 633 /* owner, open_flag */ 634 READ_BUF(open->op_owner.len + 4); 635 SAVEMEM(open->op_owner.data, open->op_owner.len); 636 READ32(open->op_create); 637 switch (open->op_create) { 638 case NFS4_OPEN_NOCREATE: 639 break; 640 case NFS4_OPEN_CREATE: 641 READ_BUF(4); 642 READ32(open->op_createmode); 643 switch (open->op_createmode) { 644 case NFS4_CREATE_UNCHECKED: 645 case NFS4_CREATE_GUARDED: 646 status = nfsd4_decode_fattr(argp, open->op_bmval, 647 &open->op_iattr, &open->op_acl); 648 if (status) 649 goto out; 650 break; 651 case NFS4_CREATE_EXCLUSIVE: 652 READ_BUF(8); 653 COPYMEM(open->op_verf.data, 8); 654 break; 655 case NFS4_CREATE_EXCLUSIVE4_1: 656 if (argp->minorversion < 1) 657 goto xdr_error; 658 READ_BUF(8); 659 COPYMEM(open->op_verf.data, 8); 660 status = nfsd4_decode_fattr(argp, open->op_bmval, 661 &open->op_iattr, &open->op_acl); 662 if (status) 663 goto out; 664 break; 665 default: 666 goto xdr_error; 667 } 668 break; 669 default: 670 goto xdr_error; 671 } 672 673 /* open_claim */ 674 READ_BUF(4); 675 READ32(open->op_claim_type); 676 switch (open->op_claim_type) { 677 case NFS4_OPEN_CLAIM_NULL: 678 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 679 READ_BUF(4); 680 READ32(open->op_fname.len); 681 READ_BUF(open->op_fname.len); 682 SAVEMEM(open->op_fname.data, open->op_fname.len); 683 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 684 return status; 685 break; 686 case NFS4_OPEN_CLAIM_PREVIOUS: 687 READ_BUF(4); 688 READ32(open->op_delegate_type); 689 break; 690 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 691 status = nfsd4_decode_stateid(argp, &open->op_delegate_stateid); 692 if (status) 693 return status; 694 READ_BUF(4); 695 READ32(open->op_fname.len); 696 READ_BUF(open->op_fname.len); 697 SAVEMEM(open->op_fname.data, open->op_fname.len); 698 if ((status = check_filename(open->op_fname.data, open->op_fname.len, nfserr_inval))) 699 return status; 700 break; 701 default: 702 goto xdr_error; 703 } 704 705 DECODE_TAIL; 706} 707 708static __be32 709nfsd4_decode_open_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_open_confirm *open_conf) 710{ 711 DECODE_HEAD; 712 713 open_conf->oc_stateowner = NULL; 714 status = nfsd4_decode_stateid(argp, &open_conf->oc_req_stateid); 715 if (status) 716 return status; 717 READ_BUF(4); 718 READ32(open_conf->oc_seqid); 719 720 DECODE_TAIL; 721} 722 723static __be32 724nfsd4_decode_open_downgrade(struct nfsd4_compoundargs *argp, struct nfsd4_open_downgrade *open_down) 725{ 726 DECODE_HEAD; 727 728 open_down->od_stateowner = NULL; 729 status = nfsd4_decode_stateid(argp, &open_down->od_stateid); 730 if (status) 731 return status; 732 READ_BUF(12); 733 READ32(open_down->od_seqid); 734 READ32(open_down->od_share_access); 735 READ32(open_down->od_share_deny); 736 737 DECODE_TAIL; 738} 739 740static __be32 741nfsd4_decode_putfh(struct nfsd4_compoundargs *argp, struct nfsd4_putfh *putfh) 742{ 743 DECODE_HEAD; 744 745 READ_BUF(4); 746 READ32(putfh->pf_fhlen); 747 if (putfh->pf_fhlen > NFS4_FHSIZE) 748 goto xdr_error; 749 READ_BUF(putfh->pf_fhlen); 750 SAVEMEM(putfh->pf_fhval, putfh->pf_fhlen); 751 752 DECODE_TAIL; 753} 754 755static __be32 756nfsd4_decode_read(struct nfsd4_compoundargs *argp, struct nfsd4_read *read) 757{ 758 DECODE_HEAD; 759 760 status = nfsd4_decode_stateid(argp, &read->rd_stateid); 761 if (status) 762 return status; 763 READ_BUF(12); 764 READ64(read->rd_offset); 765 READ32(read->rd_length); 766 767 DECODE_TAIL; 768} 769 770static __be32 771nfsd4_decode_readdir(struct nfsd4_compoundargs *argp, struct nfsd4_readdir *readdir) 772{ 773 DECODE_HEAD; 774 775 READ_BUF(24); 776 READ64(readdir->rd_cookie); 777 COPYMEM(readdir->rd_verf.data, sizeof(readdir->rd_verf.data)); 778 READ32(readdir->rd_dircount); /* just in case you needed a useless field... */ 779 READ32(readdir->rd_maxcount); 780 if ((status = nfsd4_decode_bitmap(argp, readdir->rd_bmval))) 781 goto out; 782 783 DECODE_TAIL; 784} 785 786static __be32 787nfsd4_decode_remove(struct nfsd4_compoundargs *argp, struct nfsd4_remove *remove) 788{ 789 DECODE_HEAD; 790 791 READ_BUF(4); 792 READ32(remove->rm_namelen); 793 READ_BUF(remove->rm_namelen); 794 SAVEMEM(remove->rm_name, remove->rm_namelen); 795 if ((status = check_filename(remove->rm_name, remove->rm_namelen, nfserr_noent))) 796 return status; 797 798 DECODE_TAIL; 799} 800 801static __be32 802nfsd4_decode_rename(struct nfsd4_compoundargs *argp, struct nfsd4_rename *rename) 803{ 804 DECODE_HEAD; 805 806 READ_BUF(4); 807 READ32(rename->rn_snamelen); 808 READ_BUF(rename->rn_snamelen + 4); 809 SAVEMEM(rename->rn_sname, rename->rn_snamelen); 810 READ32(rename->rn_tnamelen); 811 READ_BUF(rename->rn_tnamelen); 812 SAVEMEM(rename->rn_tname, rename->rn_tnamelen); 813 if ((status = check_filename(rename->rn_sname, rename->rn_snamelen, nfserr_noent))) 814 return status; 815 if ((status = check_filename(rename->rn_tname, rename->rn_tnamelen, nfserr_inval))) 816 return status; 817 818 DECODE_TAIL; 819} 820 821static __be32 822nfsd4_decode_renew(struct nfsd4_compoundargs *argp, clientid_t *clientid) 823{ 824 DECODE_HEAD; 825 826 READ_BUF(sizeof(clientid_t)); 827 COPYMEM(clientid, sizeof(clientid_t)); 828 829 DECODE_TAIL; 830} 831 832static __be32 833nfsd4_decode_secinfo(struct nfsd4_compoundargs *argp, 834 struct nfsd4_secinfo *secinfo) 835{ 836 DECODE_HEAD; 837 838 READ_BUF(4); 839 READ32(secinfo->si_namelen); 840 READ_BUF(secinfo->si_namelen); 841 SAVEMEM(secinfo->si_name, secinfo->si_namelen); 842 status = check_filename(secinfo->si_name, secinfo->si_namelen, 843 nfserr_noent); 844 if (status) 845 return status; 846 DECODE_TAIL; 847} 848 849static __be32 850nfsd4_decode_setattr(struct nfsd4_compoundargs *argp, struct nfsd4_setattr *setattr) 851{ 852 __be32 status; 853 854 status = nfsd4_decode_stateid(argp, &setattr->sa_stateid); 855 if (status) 856 return status; 857 return nfsd4_decode_fattr(argp, setattr->sa_bmval, &setattr->sa_iattr, 858 &setattr->sa_acl); 859} 860 861static __be32 862nfsd4_decode_setclientid(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid *setclientid) 863{ 864 DECODE_HEAD; 865 866 READ_BUF(12); 867 COPYMEM(setclientid->se_verf.data, 8); 868 READ32(setclientid->se_namelen); 869 870 READ_BUF(setclientid->se_namelen + 8); 871 SAVEMEM(setclientid->se_name, setclientid->se_namelen); 872 READ32(setclientid->se_callback_prog); 873 READ32(setclientid->se_callback_netid_len); 874 875 READ_BUF(setclientid->se_callback_netid_len + 4); 876 SAVEMEM(setclientid->se_callback_netid_val, setclientid->se_callback_netid_len); 877 READ32(setclientid->se_callback_addr_len); 878 879 READ_BUF(setclientid->se_callback_addr_len + 4); 880 SAVEMEM(setclientid->se_callback_addr_val, setclientid->se_callback_addr_len); 881 READ32(setclientid->se_callback_ident); 882 883 DECODE_TAIL; 884} 885 886static __be32 887nfsd4_decode_setclientid_confirm(struct nfsd4_compoundargs *argp, struct nfsd4_setclientid_confirm *scd_c) 888{ 889 DECODE_HEAD; 890 891 READ_BUF(8 + sizeof(nfs4_verifier)); 892 COPYMEM(&scd_c->sc_clientid, 8); 893 COPYMEM(&scd_c->sc_confirm, sizeof(nfs4_verifier)); 894 895 DECODE_TAIL; 896} 897 898/* Also used for NVERIFY */ 899static __be32 900nfsd4_decode_verify(struct nfsd4_compoundargs *argp, struct nfsd4_verify *verify) 901{ 902 DECODE_HEAD; 903 904 if ((status = nfsd4_decode_bitmap(argp, verify->ve_bmval))) 905 goto out; 906 907 /* For convenience's sake, we compare raw xdr'd attributes in 908 * nfsd4_proc_verify; however we still decode here just to return 909 * correct error in case of bad xdr. */ 910 READ_BUF(4); 911 READ32(verify->ve_attrlen); 912 READ_BUF(verify->ve_attrlen); 913 SAVEMEM(verify->ve_attrval, verify->ve_attrlen); 914 915 DECODE_TAIL; 916} 917 918static __be32 919nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write) 920{ 921 int avail; 922 int v; 923 int len; 924 DECODE_HEAD; 925 926 status = nfsd4_decode_stateid(argp, &write->wr_stateid); 927 if (status) 928 return status; 929 READ_BUF(16); 930 READ64(write->wr_offset); 931 READ32(write->wr_stable_how); 932 if (write->wr_stable_how > 2) 933 goto xdr_error; 934 READ32(write->wr_buflen); 935 936 /* Sorry .. no magic macros for this.. * 937 * READ_BUF(write->wr_buflen); 938 * SAVEMEM(write->wr_buf, write->wr_buflen); 939 */ 940 avail = (char*)argp->end - (char*)argp->p; 941 if (avail + argp->pagelen < write->wr_buflen) { 942 dprintk("NFSD: xdr error (%s:%d)\n", 943 __FILE__, __LINE__); 944 goto xdr_error; 945 } 946 argp->rqstp->rq_vec[0].iov_base = p; 947 argp->rqstp->rq_vec[0].iov_len = avail; 948 v = 0; 949 len = write->wr_buflen; 950 while (len > argp->rqstp->rq_vec[v].iov_len) { 951 len -= argp->rqstp->rq_vec[v].iov_len; 952 v++; 953 argp->rqstp->rq_vec[v].iov_base = page_address(argp->pagelist[0]); 954 argp->pagelist++; 955 if (argp->pagelen >= PAGE_SIZE) { 956 argp->rqstp->rq_vec[v].iov_len = PAGE_SIZE; 957 argp->pagelen -= PAGE_SIZE; 958 } else { 959 argp->rqstp->rq_vec[v].iov_len = argp->pagelen; 960 argp->pagelen -= len; 961 } 962 } 963 argp->end = (__be32*) (argp->rqstp->rq_vec[v].iov_base + argp->rqstp->rq_vec[v].iov_len); 964 argp->p = (__be32*) (argp->rqstp->rq_vec[v].iov_base + (XDR_QUADLEN(len) << 2)); 965 argp->rqstp->rq_vec[v].iov_len = len; 966 write->wr_vlen = v+1; 967 968 DECODE_TAIL; 969} 970 971static __be32 972nfsd4_decode_release_lockowner(struct nfsd4_compoundargs *argp, struct nfsd4_release_lockowner *rlockowner) 973{ 974 DECODE_HEAD; 975 976 READ_BUF(12); 977 COPYMEM(&rlockowner->rl_clientid, sizeof(clientid_t)); 978 READ32(rlockowner->rl_owner.len); 979 READ_BUF(rlockowner->rl_owner.len); 980 READMEM(rlockowner->rl_owner.data, rlockowner->rl_owner.len); 981 982 if (argp->minorversion && !zero_clientid(&rlockowner->rl_clientid)) 983 return nfserr_inval; 984 DECODE_TAIL; 985} 986 987static __be32 988nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp, 989 struct nfsd4_exchange_id *exid) 990{ 991 int dummy; 992 DECODE_HEAD; 993 994 READ_BUF(NFS4_VERIFIER_SIZE); 995 COPYMEM(exid->verifier.data, NFS4_VERIFIER_SIZE); 996 997 READ_BUF(4); 998 READ32(exid->clname.len); 999 1000 READ_BUF(exid->clname.len); 1001 SAVEMEM(exid->clname.data, exid->clname.len); 1002 1003 READ_BUF(4); 1004 READ32(exid->flags); 1005 1006 /* Ignore state_protect4_a */ 1007 READ_BUF(4); 1008 READ32(exid->spa_how); 1009 switch (exid->spa_how) { 1010 case SP4_NONE: 1011 break; 1012 case SP4_MACH_CRED: 1013 /* spo_must_enforce */ 1014 READ_BUF(4); 1015 READ32(dummy); 1016 READ_BUF(dummy * 4); 1017 p += dummy; 1018 1019 /* spo_must_allow */ 1020 READ_BUF(4); 1021 READ32(dummy); 1022 READ_BUF(dummy * 4); 1023 p += dummy; 1024 break; 1025 case SP4_SSV: 1026 /* ssp_ops */ 1027 READ_BUF(4); 1028 READ32(dummy); 1029 READ_BUF(dummy * 4); 1030 p += dummy; 1031 1032 READ_BUF(4); 1033 READ32(dummy); 1034 READ_BUF(dummy * 4); 1035 p += dummy; 1036 1037 /* ssp_hash_algs<> */ 1038 READ_BUF(4); 1039 READ32(dummy); 1040 READ_BUF(dummy); 1041 p += XDR_QUADLEN(dummy); 1042 1043 /* ssp_encr_algs<> */ 1044 READ_BUF(4); 1045 READ32(dummy); 1046 READ_BUF(dummy); 1047 p += XDR_QUADLEN(dummy); 1048 1049 /* ssp_window and ssp_num_gss_handles */ 1050 READ_BUF(8); 1051 READ32(dummy); 1052 READ32(dummy); 1053 break; 1054 default: 1055 goto xdr_error; 1056 } 1057 1058 /* Ignore Implementation ID */ 1059 READ_BUF(4); /* nfs_impl_id4 array length */ 1060 READ32(dummy); 1061 1062 if (dummy > 1) 1063 goto xdr_error; 1064 1065 if (dummy == 1) { 1066 /* nii_domain */ 1067 READ_BUF(4); 1068 READ32(dummy); 1069 READ_BUF(dummy); 1070 p += XDR_QUADLEN(dummy); 1071 1072 /* nii_name */ 1073 READ_BUF(4); 1074 READ32(dummy); 1075 READ_BUF(dummy); 1076 p += XDR_QUADLEN(dummy); 1077 1078 /* nii_date */ 1079 READ_BUF(12); 1080 p += 3; 1081 } 1082 DECODE_TAIL; 1083} 1084 1085static __be32 1086nfsd4_decode_create_session(struct nfsd4_compoundargs *argp, 1087 struct nfsd4_create_session *sess) 1088{ 1089 DECODE_HEAD; 1090 1091 u32 dummy; 1092 char *machine_name; 1093 int i; 1094 int nr_secflavs; 1095 1096 READ_BUF(16); 1097 COPYMEM(&sess->clientid, 8); 1098 READ32(sess->seqid); 1099 READ32(sess->flags); 1100 1101 /* Fore channel attrs */ 1102 READ_BUF(28); 1103 READ32(dummy); /* headerpadsz is always 0 */ 1104 READ32(sess->fore_channel.maxreq_sz); 1105 READ32(sess->fore_channel.maxresp_sz); 1106 READ32(sess->fore_channel.maxresp_cached); 1107 READ32(sess->fore_channel.maxops); 1108 READ32(sess->fore_channel.maxreqs); 1109 READ32(sess->fore_channel.nr_rdma_attrs); 1110 if (sess->fore_channel.nr_rdma_attrs == 1) { 1111 READ_BUF(4); 1112 READ32(sess->fore_channel.rdma_attrs); 1113 } else if (sess->fore_channel.nr_rdma_attrs > 1) { 1114 dprintk("Too many fore channel attr bitmaps!\n"); 1115 goto xdr_error; 1116 } 1117 1118 /* Back channel attrs */ 1119 READ_BUF(28); 1120 READ32(dummy); /* headerpadsz is always 0 */ 1121 READ32(sess->back_channel.maxreq_sz); 1122 READ32(sess->back_channel.maxresp_sz); 1123 READ32(sess->back_channel.maxresp_cached); 1124 READ32(sess->back_channel.maxops); 1125 READ32(sess->back_channel.maxreqs); 1126 READ32(sess->back_channel.nr_rdma_attrs); 1127 if (sess->back_channel.nr_rdma_attrs == 1) { 1128 READ_BUF(4); 1129 READ32(sess->back_channel.rdma_attrs); 1130 } else if (sess->back_channel.nr_rdma_attrs > 1) { 1131 dprintk("Too many back channel attr bitmaps!\n"); 1132 goto xdr_error; 1133 } 1134 1135 READ_BUF(8); 1136 READ32(sess->callback_prog); 1137 1138 /* callback_sec_params4 */ 1139 READ32(nr_secflavs); 1140 for (i = 0; i < nr_secflavs; ++i) { 1141 READ_BUF(4); 1142 READ32(dummy); 1143 switch (dummy) { 1144 case RPC_AUTH_NULL: 1145 /* Nothing to read */ 1146 break; 1147 case RPC_AUTH_UNIX: 1148 READ_BUF(8); 1149 /* stamp */ 1150 READ32(dummy); 1151 1152 /* machine name */ 1153 READ32(dummy); 1154 READ_BUF(dummy); 1155 SAVEMEM(machine_name, dummy); 1156 1157 /* uid, gid */ 1158 READ_BUF(8); 1159 READ32(sess->uid); 1160 READ32(sess->gid); 1161 1162 /* more gids */ 1163 READ_BUF(4); 1164 READ32(dummy); 1165 READ_BUF(dummy * 4); 1166 for (i = 0; i < dummy; ++i) 1167 READ32(dummy); 1168 break; 1169 case RPC_AUTH_GSS: 1170 dprintk("RPC_AUTH_GSS callback secflavor " 1171 "not supported!\n"); 1172 READ_BUF(8); 1173 /* gcbp_service */ 1174 READ32(dummy); 1175 /* gcbp_handle_from_server */ 1176 READ32(dummy); 1177 READ_BUF(dummy); 1178 p += XDR_QUADLEN(dummy); 1179 /* gcbp_handle_from_client */ 1180 READ_BUF(4); 1181 READ32(dummy); 1182 READ_BUF(dummy); 1183 p += XDR_QUADLEN(dummy); 1184 break; 1185 default: 1186 dprintk("Illegal callback secflavor\n"); 1187 return nfserr_inval; 1188 } 1189 } 1190 DECODE_TAIL; 1191} 1192 1193static __be32 1194nfsd4_decode_destroy_session(struct nfsd4_compoundargs *argp, 1195 struct nfsd4_destroy_session *destroy_session) 1196{ 1197 DECODE_HEAD; 1198 READ_BUF(NFS4_MAX_SESSIONID_LEN); 1199 COPYMEM(destroy_session->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1200 1201 DECODE_TAIL; 1202} 1203 1204static __be32 1205nfsd4_decode_sequence(struct nfsd4_compoundargs *argp, 1206 struct nfsd4_sequence *seq) 1207{ 1208 DECODE_HEAD; 1209 1210 READ_BUF(NFS4_MAX_SESSIONID_LEN + 16); 1211 COPYMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 1212 READ32(seq->seqid); 1213 READ32(seq->slotid); 1214 READ32(seq->maxslots); 1215 READ32(seq->cachethis); 1216 1217 DECODE_TAIL; 1218} 1219 1220static __be32 nfsd4_decode_reclaim_complete(struct nfsd4_compoundargs *argp, struct nfsd4_reclaim_complete *rc) 1221{ 1222 DECODE_HEAD; 1223 1224 READ_BUF(4); 1225 READ32(rc->rca_one_fs); 1226 1227 DECODE_TAIL; 1228} 1229 1230static __be32 1231nfsd4_decode_noop(struct nfsd4_compoundargs *argp, void *p) 1232{ 1233 return nfs_ok; 1234} 1235 1236static __be32 1237nfsd4_decode_notsupp(struct nfsd4_compoundargs *argp, void *p) 1238{ 1239 return nfserr_notsupp; 1240} 1241 1242typedef __be32(*nfsd4_dec)(struct nfsd4_compoundargs *argp, void *); 1243 1244static nfsd4_dec nfsd4_dec_ops[] = { 1245 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1246 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1247 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1248 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1249 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1250 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1251 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1252 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1253 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1254 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1255 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1256 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1257 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1258 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1259 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1260 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1261 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1262 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_open_confirm, 1263 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1264 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1265 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_noop, 1266 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1267 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1268 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1269 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1270 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1271 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1272 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_renew, 1273 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1274 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1275 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1276 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1277 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_setclientid, 1278 [OP_SETCLIENTID_CONFIRM] = (nfsd4_dec)nfsd4_decode_setclientid_confirm, 1279 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1280 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1281 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_release_lockowner, 1282}; 1283 1284static nfsd4_dec nfsd41_dec_ops[] = { 1285 [OP_ACCESS] = (nfsd4_dec)nfsd4_decode_access, 1286 [OP_CLOSE] = (nfsd4_dec)nfsd4_decode_close, 1287 [OP_COMMIT] = (nfsd4_dec)nfsd4_decode_commit, 1288 [OP_CREATE] = (nfsd4_dec)nfsd4_decode_create, 1289 [OP_DELEGPURGE] = (nfsd4_dec)nfsd4_decode_notsupp, 1290 [OP_DELEGRETURN] = (nfsd4_dec)nfsd4_decode_delegreturn, 1291 [OP_GETATTR] = (nfsd4_dec)nfsd4_decode_getattr, 1292 [OP_GETFH] = (nfsd4_dec)nfsd4_decode_noop, 1293 [OP_LINK] = (nfsd4_dec)nfsd4_decode_link, 1294 [OP_LOCK] = (nfsd4_dec)nfsd4_decode_lock, 1295 [OP_LOCKT] = (nfsd4_dec)nfsd4_decode_lockt, 1296 [OP_LOCKU] = (nfsd4_dec)nfsd4_decode_locku, 1297 [OP_LOOKUP] = (nfsd4_dec)nfsd4_decode_lookup, 1298 [OP_LOOKUPP] = (nfsd4_dec)nfsd4_decode_noop, 1299 [OP_NVERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1300 [OP_OPEN] = (nfsd4_dec)nfsd4_decode_open, 1301 [OP_OPENATTR] = (nfsd4_dec)nfsd4_decode_notsupp, 1302 [OP_OPEN_CONFIRM] = (nfsd4_dec)nfsd4_decode_notsupp, 1303 [OP_OPEN_DOWNGRADE] = (nfsd4_dec)nfsd4_decode_open_downgrade, 1304 [OP_PUTFH] = (nfsd4_dec)nfsd4_decode_putfh, 1305 [OP_PUTPUBFH] = (nfsd4_dec)nfsd4_decode_notsupp, 1306 [OP_PUTROOTFH] = (nfsd4_dec)nfsd4_decode_noop, 1307 [OP_READ] = (nfsd4_dec)nfsd4_decode_read, 1308 [OP_READDIR] = (nfsd4_dec)nfsd4_decode_readdir, 1309 [OP_READLINK] = (nfsd4_dec)nfsd4_decode_noop, 1310 [OP_REMOVE] = (nfsd4_dec)nfsd4_decode_remove, 1311 [OP_RENAME] = (nfsd4_dec)nfsd4_decode_rename, 1312 [OP_RENEW] = (nfsd4_dec)nfsd4_decode_notsupp, 1313 [OP_RESTOREFH] = (nfsd4_dec)nfsd4_decode_noop, 1314 [OP_SAVEFH] = (nfsd4_dec)nfsd4_decode_noop, 1315 [OP_SECINFO] = (nfsd4_dec)nfsd4_decode_secinfo, 1316 [OP_SETATTR] = (nfsd4_dec)nfsd4_decode_setattr, 1317 [OP_SETCLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, 1318 [OP_SETCLIENTID_CONFIRM]= (nfsd4_dec)nfsd4_decode_notsupp, 1319 [OP_VERIFY] = (nfsd4_dec)nfsd4_decode_verify, 1320 [OP_WRITE] = (nfsd4_dec)nfsd4_decode_write, 1321 [OP_RELEASE_LOCKOWNER] = (nfsd4_dec)nfsd4_decode_notsupp, 1322 1323 /* new operations for NFSv4.1 */ 1324 [OP_BACKCHANNEL_CTL] = (nfsd4_dec)nfsd4_decode_notsupp, 1325 [OP_BIND_CONN_TO_SESSION]= (nfsd4_dec)nfsd4_decode_notsupp, 1326 [OP_EXCHANGE_ID] = (nfsd4_dec)nfsd4_decode_exchange_id, 1327 [OP_CREATE_SESSION] = (nfsd4_dec)nfsd4_decode_create_session, 1328 [OP_DESTROY_SESSION] = (nfsd4_dec)nfsd4_decode_destroy_session, 1329 [OP_FREE_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp, 1330 [OP_GET_DIR_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1331 [OP_GETDEVICEINFO] = (nfsd4_dec)nfsd4_decode_notsupp, 1332 [OP_GETDEVICELIST] = (nfsd4_dec)nfsd4_decode_notsupp, 1333 [OP_LAYOUTCOMMIT] = (nfsd4_dec)nfsd4_decode_notsupp, 1334 [OP_LAYOUTGET] = (nfsd4_dec)nfsd4_decode_notsupp, 1335 [OP_LAYOUTRETURN] = (nfsd4_dec)nfsd4_decode_notsupp, 1336 [OP_SECINFO_NO_NAME] = (nfsd4_dec)nfsd4_decode_notsupp, 1337 [OP_SEQUENCE] = (nfsd4_dec)nfsd4_decode_sequence, 1338 [OP_SET_SSV] = (nfsd4_dec)nfsd4_decode_notsupp, 1339 [OP_TEST_STATEID] = (nfsd4_dec)nfsd4_decode_notsupp, 1340 [OP_WANT_DELEGATION] = (nfsd4_dec)nfsd4_decode_notsupp, 1341 [OP_DESTROY_CLIENTID] = (nfsd4_dec)nfsd4_decode_notsupp, 1342 [OP_RECLAIM_COMPLETE] = (nfsd4_dec)nfsd4_decode_reclaim_complete, 1343}; 1344 1345struct nfsd4_minorversion_ops { 1346 nfsd4_dec *decoders; 1347 int nops; 1348}; 1349 1350static struct nfsd4_minorversion_ops nfsd4_minorversion[] = { 1351 [0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) }, 1352 [1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) }, 1353}; 1354 1355static __be32 1356nfsd4_decode_compound(struct nfsd4_compoundargs *argp) 1357{ 1358 DECODE_HEAD; 1359 struct nfsd4_op *op; 1360 struct nfsd4_minorversion_ops *ops; 1361 int i; 1362 1363 READ_BUF(4); 1364 READ32(argp->taglen); 1365 READ_BUF(argp->taglen + 8); 1366 SAVEMEM(argp->tag, argp->taglen); 1367 READ32(argp->minorversion); 1368 READ32(argp->opcnt); 1369 1370 if (argp->taglen > NFSD4_MAX_TAGLEN) 1371 goto xdr_error; 1372 if (argp->opcnt > 100) 1373 goto xdr_error; 1374 1375 if (argp->opcnt > ARRAY_SIZE(argp->iops)) { 1376 argp->ops = kmalloc(argp->opcnt * sizeof(*argp->ops), GFP_KERNEL); 1377 if (!argp->ops) { 1378 argp->ops = argp->iops; 1379 dprintk("nfsd: couldn't allocate room for COMPOUND\n"); 1380 goto xdr_error; 1381 } 1382 } 1383 1384 if (argp->minorversion >= ARRAY_SIZE(nfsd4_minorversion)) 1385 argp->opcnt = 0; 1386 1387 ops = &nfsd4_minorversion[argp->minorversion]; 1388 for (i = 0; i < argp->opcnt; i++) { 1389 op = &argp->ops[i]; 1390 op->replay = NULL; 1391 1392 /* 1393 * We can't use READ_BUF() here because we need to handle 1394 * a missing opcode as an OP_WRITE + 1. So we need to check 1395 * to see if we're truly at the end of our buffer or if there 1396 * is another page we need to flip to. 1397 */ 1398 1399 if (argp->p == argp->end) { 1400 if (argp->pagelen < 4) { 1401 /* There isn't an opcode still on the wire */ 1402 op->opnum = OP_WRITE + 1; 1403 op->status = nfserr_bad_xdr; 1404 argp->opcnt = i+1; 1405 break; 1406 } 1407 1408 /* 1409 * False alarm. We just hit a page boundary, but there 1410 * is still data available. Move pointer across page 1411 * boundary. *snip from READ_BUF* 1412 */ 1413 argp->p = page_address(argp->pagelist[0]); 1414 argp->pagelist++; 1415 if (argp->pagelen < PAGE_SIZE) { 1416 argp->end = argp->p + (argp->pagelen>>2); 1417 argp->pagelen = 0; 1418 } else { 1419 argp->end = argp->p + (PAGE_SIZE>>2); 1420 argp->pagelen -= PAGE_SIZE; 1421 } 1422 } 1423 op->opnum = ntohl(*argp->p++); 1424 1425 if (op->opnum >= FIRST_NFS4_OP && op->opnum <= LAST_NFS4_OP) 1426 op->status = ops->decoders[op->opnum](argp, &op->u); 1427 else { 1428 op->opnum = OP_ILLEGAL; 1429 op->status = nfserr_op_illegal; 1430 } 1431 1432 if (op->status) { 1433 argp->opcnt = i+1; 1434 break; 1435 } 1436 } 1437 1438 DECODE_TAIL; 1439} 1440 1441#define WRITE32(n) *p++ = htonl(n) 1442#define WRITE64(n) do { \ 1443 *p++ = htonl((u32)((n) >> 32)); \ 1444 *p++ = htonl((u32)(n)); \ 1445} while (0) 1446#define WRITEMEM(ptr,nbytes) do { if (nbytes > 0) { \ 1447 *(p + XDR_QUADLEN(nbytes) -1) = 0; \ 1448 memcpy(p, ptr, nbytes); \ 1449 p += XDR_QUADLEN(nbytes); \ 1450}} while (0) 1451 1452static void write32(__be32 **p, u32 n) 1453{ 1454 *(*p)++ = n; 1455} 1456 1457static void write64(__be32 **p, u64 n) 1458{ 1459 write32(p, (u32)(n >> 32)); 1460 write32(p, (u32)n); 1461} 1462 1463static void write_change(__be32 **p, struct kstat *stat, struct inode *inode) 1464{ 1465 if (IS_I_VERSION(inode)) { 1466 write64(p, inode->i_version); 1467 } else { 1468 write32(p, stat->ctime.tv_sec); 1469 write32(p, stat->ctime.tv_nsec); 1470 } 1471} 1472 1473static void write_cinfo(__be32 **p, struct nfsd4_change_info *c) 1474{ 1475 write32(p, c->atomic); 1476 if (c->change_supported) { 1477 write64(p, c->before_change); 1478 write64(p, c->after_change); 1479 } else { 1480 write32(p, c->before_ctime_sec); 1481 write32(p, c->before_ctime_nsec); 1482 write32(p, c->after_ctime_sec); 1483 write32(p, c->after_ctime_nsec); 1484 } 1485} 1486 1487#define RESERVE_SPACE(nbytes) do { \ 1488 p = resp->p; \ 1489 BUG_ON(p + XDR_QUADLEN(nbytes) > resp->end); \ 1490} while (0) 1491#define ADJUST_ARGS() resp->p = p 1492 1493/* 1494 * Header routine to setup seqid operation replay cache 1495 */ 1496#define ENCODE_SEQID_OP_HEAD \ 1497 __be32 *save; \ 1498 \ 1499 save = resp->p; 1500 1501/* 1502 * Routine for encoding the result of a "seqid-mutating" NFSv4 operation. This 1503 * is where sequence id's are incremented, and the replay cache is filled. 1504 * Note that we increment sequence id's here, at the last moment, so we're sure 1505 * we know whether the error to be returned is a sequence id mutating error. 1506 */ 1507 1508#define ENCODE_SEQID_OP_TAIL(stateowner) do { \ 1509 if (seqid_mutating_err(nfserr) && stateowner) { \ 1510 stateowner->so_seqid++; \ 1511 stateowner->so_replay.rp_status = nfserr; \ 1512 stateowner->so_replay.rp_buflen = \ 1513 (((char *)(resp)->p - (char *)save)); \ 1514 memcpy(stateowner->so_replay.rp_buf, save, \ 1515 stateowner->so_replay.rp_buflen); \ 1516 } } while (0); 1517 1518/* Encode as an array of strings the string given with components 1519 * separated @sep. 1520 */ 1521static __be32 nfsd4_encode_components(char sep, char *components, 1522 __be32 **pp, int *buflen) 1523{ 1524 __be32 *p = *pp; 1525 __be32 *countp = p; 1526 int strlen, count=0; 1527 char *str, *end; 1528 1529 dprintk("nfsd4_encode_components(%s)\n", components); 1530 if ((*buflen -= 4) < 0) 1531 return nfserr_resource; 1532 WRITE32(0); /* We will fill this in with @count later */ 1533 end = str = components; 1534 while (*end) { 1535 for (; *end && (*end != sep); end++) 1536 ; /* Point to end of component */ 1537 strlen = end - str; 1538 if (strlen) { 1539 if ((*buflen -= ((XDR_QUADLEN(strlen) << 2) + 4)) < 0) 1540 return nfserr_resource; 1541 WRITE32(strlen); 1542 WRITEMEM(str, strlen); 1543 count++; 1544 } 1545 else 1546 end++; 1547 str = end; 1548 } 1549 *pp = p; 1550 p = countp; 1551 WRITE32(count); 1552 return 0; 1553} 1554 1555/* 1556 * encode a location element of a fs_locations structure 1557 */ 1558static __be32 nfsd4_encode_fs_location4(struct nfsd4_fs_location *location, 1559 __be32 **pp, int *buflen) 1560{ 1561 __be32 status; 1562 __be32 *p = *pp; 1563 1564 status = nfsd4_encode_components(':', location->hosts, &p, buflen); 1565 if (status) 1566 return status; 1567 status = nfsd4_encode_components('/', location->path, &p, buflen); 1568 if (status) 1569 return status; 1570 *pp = p; 1571 return 0; 1572} 1573 1574/* 1575 * Return the path to an export point in the pseudo filesystem namespace 1576 * Returned string is safe to use as long as the caller holds a reference 1577 * to @exp. 1578 */ 1579static char *nfsd4_path(struct svc_rqst *rqstp, struct svc_export *exp, __be32 *stat) 1580{ 1581 struct svc_fh tmp_fh; 1582 char *path = NULL, *rootpath; 1583 size_t rootlen; 1584 1585 fh_init(&tmp_fh, NFS4_FHSIZE); 1586 *stat = exp_pseudoroot(rqstp, &tmp_fh); 1587 if (*stat) 1588 return NULL; 1589 rootpath = tmp_fh.fh_export->ex_pathname; 1590 1591 path = exp->ex_pathname; 1592 1593 rootlen = strlen(rootpath); 1594 if (strncmp(path, rootpath, rootlen)) { 1595 dprintk("nfsd: fs_locations failed;" 1596 "%s is not contained in %s\n", path, rootpath); 1597 *stat = nfserr_notsupp; 1598 path = NULL; 1599 goto out; 1600 } 1601 path += rootlen; 1602out: 1603 fh_put(&tmp_fh); 1604 return path; 1605} 1606 1607/* 1608 * encode a fs_locations structure 1609 */ 1610static __be32 nfsd4_encode_fs_locations(struct svc_rqst *rqstp, 1611 struct svc_export *exp, 1612 __be32 **pp, int *buflen) 1613{ 1614 __be32 status; 1615 int i; 1616 __be32 *p = *pp; 1617 struct nfsd4_fs_locations *fslocs = &exp->ex_fslocs; 1618 char *root = nfsd4_path(rqstp, exp, &status); 1619 1620 if (status) 1621 return status; 1622 status = nfsd4_encode_components('/', root, &p, buflen); 1623 if (status) 1624 return status; 1625 if ((*buflen -= 4) < 0) 1626 return nfserr_resource; 1627 WRITE32(fslocs->locations_count); 1628 for (i=0; i<fslocs->locations_count; i++) { 1629 status = nfsd4_encode_fs_location4(&fslocs->locations[i], 1630 &p, buflen); 1631 if (status) 1632 return status; 1633 } 1634 *pp = p; 1635 return 0; 1636} 1637 1638static u32 nfs4_ftypes[16] = { 1639 NF4BAD, NF4FIFO, NF4CHR, NF4BAD, 1640 NF4DIR, NF4BAD, NF4BLK, NF4BAD, 1641 NF4REG, NF4BAD, NF4LNK, NF4BAD, 1642 NF4SOCK, NF4BAD, NF4LNK, NF4BAD, 1643}; 1644 1645static __be32 1646nfsd4_encode_name(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1647 __be32 **p, int *buflen) 1648{ 1649 int status; 1650 1651 if (*buflen < (XDR_QUADLEN(IDMAP_NAMESZ) << 2) + 4) 1652 return nfserr_resource; 1653 if (whotype != NFS4_ACL_WHO_NAMED) 1654 status = nfs4_acl_write_who(whotype, (u8 *)(*p + 1)); 1655 else if (group) 1656 status = nfsd_map_gid_to_name(rqstp, id, (u8 *)(*p + 1)); 1657 else 1658 status = nfsd_map_uid_to_name(rqstp, id, (u8 *)(*p + 1)); 1659 if (status < 0) 1660 return nfserrno(status); 1661 *p = xdr_encode_opaque(*p, NULL, status); 1662 *buflen -= (XDR_QUADLEN(status) << 2) + 4; 1663 BUG_ON(*buflen < 0); 1664 return 0; 1665} 1666 1667static inline __be32 1668nfsd4_encode_user(struct svc_rqst *rqstp, uid_t uid, __be32 **p, int *buflen) 1669{ 1670 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, uid, 0, p, buflen); 1671} 1672 1673static inline __be32 1674nfsd4_encode_group(struct svc_rqst *rqstp, uid_t gid, __be32 **p, int *buflen) 1675{ 1676 return nfsd4_encode_name(rqstp, NFS4_ACL_WHO_NAMED, gid, 1, p, buflen); 1677} 1678 1679static inline __be32 1680nfsd4_encode_aclname(struct svc_rqst *rqstp, int whotype, uid_t id, int group, 1681 __be32 **p, int *buflen) 1682{ 1683 return nfsd4_encode_name(rqstp, whotype, id, group, p, buflen); 1684} 1685 1686#define WORD0_ABSENT_FS_ATTRS (FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_FSID | \ 1687 FATTR4_WORD0_RDATTR_ERROR) 1688#define WORD1_ABSENT_FS_ATTRS FATTR4_WORD1_MOUNTED_ON_FILEID 1689 1690static __be32 fattr_handle_absent_fs(u32 *bmval0, u32 *bmval1, u32 *rdattr_err) 1691{ 1692 /* As per referral draft: */ 1693 if (*bmval0 & ~WORD0_ABSENT_FS_ATTRS || 1694 *bmval1 & ~WORD1_ABSENT_FS_ATTRS) { 1695 if (*bmval0 & FATTR4_WORD0_RDATTR_ERROR || 1696 *bmval0 & FATTR4_WORD0_FS_LOCATIONS) 1697 *rdattr_err = NFSERR_MOVED; 1698 else 1699 return nfserr_moved; 1700 } 1701 *bmval0 &= WORD0_ABSENT_FS_ATTRS; 1702 *bmval1 &= WORD1_ABSENT_FS_ATTRS; 1703 return 0; 1704} 1705 1706/* 1707 * Note: @fhp can be NULL; in this case, we might have to compose the filehandle 1708 * ourselves. 1709 * 1710 * @countp is the buffer size in _words_; upon successful return this becomes 1711 * replaced with the number of words written. 1712 */ 1713__be32 1714nfsd4_encode_fattr(struct svc_fh *fhp, struct svc_export *exp, 1715 struct dentry *dentry, __be32 *buffer, int *countp, u32 *bmval, 1716 struct svc_rqst *rqstp, int ignore_crossmnt) 1717{ 1718 u32 bmval0 = bmval[0]; 1719 u32 bmval1 = bmval[1]; 1720 u32 bmval2 = bmval[2]; 1721 struct kstat stat; 1722 struct svc_fh tempfh; 1723 struct kstatfs statfs; 1724 int buflen = *countp << 2; 1725 __be32 *attrlenp; 1726 u32 dummy; 1727 u64 dummy64; 1728 u32 rdattr_err = 0; 1729 __be32 *p = buffer; 1730 __be32 status; 1731 int err; 1732 int aclsupport = 0; 1733 struct nfs4_acl *acl = NULL; 1734 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1735 u32 minorversion = resp->cstate.minorversion; 1736 struct path path = { 1737 .mnt = exp->ex_path.mnt, 1738 .dentry = dentry, 1739 }; 1740 1741 BUG_ON(bmval1 & NFSD_WRITEONLY_ATTRS_WORD1); 1742 BUG_ON(bmval0 & ~nfsd_suppattrs0(minorversion)); 1743 BUG_ON(bmval1 & ~nfsd_suppattrs1(minorversion)); 1744 BUG_ON(bmval2 & ~nfsd_suppattrs2(minorversion)); 1745 1746 if (exp->ex_fslocs.migrated) { 1747 BUG_ON(bmval[2]); 1748 status = fattr_handle_absent_fs(&bmval0, &bmval1, &rdattr_err); 1749 if (status) 1750 goto out; 1751 } 1752 1753 err = vfs_getattr(exp->ex_path.mnt, dentry, &stat); 1754 if (err) 1755 goto out_nfserr; 1756 if ((bmval0 & (FATTR4_WORD0_FILES_FREE | FATTR4_WORD0_FILES_TOTAL | 1757 FATTR4_WORD0_MAXNAME)) || 1758 (bmval1 & (FATTR4_WORD1_SPACE_AVAIL | FATTR4_WORD1_SPACE_FREE | 1759 FATTR4_WORD1_SPACE_TOTAL))) { 1760 err = vfs_statfs(&path, &statfs); 1761 if (err) 1762 goto out_nfserr; 1763 } 1764 if ((bmval0 & (FATTR4_WORD0_FILEHANDLE | FATTR4_WORD0_FSID)) && !fhp) { 1765 fh_init(&tempfh, NFS4_FHSIZE); 1766 status = fh_compose(&tempfh, exp, dentry, NULL); 1767 if (status) 1768 goto out; 1769 fhp = &tempfh; 1770 } 1771 if (bmval0 & (FATTR4_WORD0_ACL | FATTR4_WORD0_ACLSUPPORT 1772 | FATTR4_WORD0_SUPPORTED_ATTRS)) { 1773 err = nfsd4_get_nfs4_acl(rqstp, dentry, &acl); 1774 aclsupport = (err == 0); 1775 if (bmval0 & FATTR4_WORD0_ACL) { 1776 if (err == -EOPNOTSUPP) 1777 bmval0 &= ~FATTR4_WORD0_ACL; 1778 else if (err == -EINVAL) { 1779 status = nfserr_attrnotsupp; 1780 goto out; 1781 } else if (err != 0) 1782 goto out_nfserr; 1783 } 1784 } 1785 if ((buflen -= 16) < 0) 1786 goto out_resource; 1787 1788 if (unlikely(bmval2)) { 1789 WRITE32(3); 1790 WRITE32(bmval0); 1791 WRITE32(bmval1); 1792 WRITE32(bmval2); 1793 } else if (likely(bmval1)) { 1794 WRITE32(2); 1795 WRITE32(bmval0); 1796 WRITE32(bmval1); 1797 } else { 1798 WRITE32(1); 1799 WRITE32(bmval0); 1800 } 1801 attrlenp = p++; /* to be backfilled later */ 1802 1803 if (bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) { 1804 u32 word0 = nfsd_suppattrs0(minorversion); 1805 u32 word1 = nfsd_suppattrs1(minorversion); 1806 u32 word2 = nfsd_suppattrs2(minorversion); 1807 1808 if ((buflen -= 12) < 0) 1809 goto out_resource; 1810 if (!aclsupport) 1811 word0 &= ~FATTR4_WORD0_ACL; 1812 if (!word2) { 1813 WRITE32(2); 1814 WRITE32(word0); 1815 WRITE32(word1); 1816 } else { 1817 WRITE32(3); 1818 WRITE32(word0); 1819 WRITE32(word1); 1820 WRITE32(word2); 1821 } 1822 } 1823 if (bmval0 & FATTR4_WORD0_TYPE) { 1824 if ((buflen -= 4) < 0) 1825 goto out_resource; 1826 dummy = nfs4_ftypes[(stat.mode & S_IFMT) >> 12]; 1827 if (dummy == NF4BAD) 1828 goto out_serverfault; 1829 WRITE32(dummy); 1830 } 1831 if (bmval0 & FATTR4_WORD0_FH_EXPIRE_TYPE) { 1832 if ((buflen -= 4) < 0) 1833 goto out_resource; 1834 if (exp->ex_flags & NFSEXP_NOSUBTREECHECK) 1835 WRITE32(NFS4_FH_PERSISTENT); 1836 else 1837 WRITE32(NFS4_FH_PERSISTENT|NFS4_FH_VOL_RENAME); 1838 } 1839 if (bmval0 & FATTR4_WORD0_CHANGE) { 1840 if ((buflen -= 8) < 0) 1841 goto out_resource; 1842 write_change(&p, &stat, dentry->d_inode); 1843 } 1844 if (bmval0 & FATTR4_WORD0_SIZE) { 1845 if ((buflen -= 8) < 0) 1846 goto out_resource; 1847 WRITE64(stat.size); 1848 } 1849 if (bmval0 & FATTR4_WORD0_LINK_SUPPORT) { 1850 if ((buflen -= 4) < 0) 1851 goto out_resource; 1852 WRITE32(1); 1853 } 1854 if (bmval0 & FATTR4_WORD0_SYMLINK_SUPPORT) { 1855 if ((buflen -= 4) < 0) 1856 goto out_resource; 1857 WRITE32(1); 1858 } 1859 if (bmval0 & FATTR4_WORD0_NAMED_ATTR) { 1860 if ((buflen -= 4) < 0) 1861 goto out_resource; 1862 WRITE32(0); 1863 } 1864 if (bmval0 & FATTR4_WORD0_FSID) { 1865 if ((buflen -= 16) < 0) 1866 goto out_resource; 1867 if (exp->ex_fslocs.migrated) { 1868 WRITE64(NFS4_REFERRAL_FSID_MAJOR); 1869 WRITE64(NFS4_REFERRAL_FSID_MINOR); 1870 } else switch(fsid_source(fhp)) { 1871 case FSIDSOURCE_FSID: 1872 WRITE64((u64)exp->ex_fsid); 1873 WRITE64((u64)0); 1874 break; 1875 case FSIDSOURCE_DEV: 1876 WRITE32(0); 1877 WRITE32(MAJOR(stat.dev)); 1878 WRITE32(0); 1879 WRITE32(MINOR(stat.dev)); 1880 break; 1881 case FSIDSOURCE_UUID: 1882 WRITEMEM(exp->ex_uuid, 16); 1883 break; 1884 } 1885 } 1886 if (bmval0 & FATTR4_WORD0_UNIQUE_HANDLES) { 1887 if ((buflen -= 4) < 0) 1888 goto out_resource; 1889 WRITE32(0); 1890 } 1891 if (bmval0 & FATTR4_WORD0_LEASE_TIME) { 1892 if ((buflen -= 4) < 0) 1893 goto out_resource; 1894 WRITE32(nfsd4_lease); 1895 } 1896 if (bmval0 & FATTR4_WORD0_RDATTR_ERROR) { 1897 if ((buflen -= 4) < 0) 1898 goto out_resource; 1899 WRITE32(rdattr_err); 1900 } 1901 if (bmval0 & FATTR4_WORD0_ACL) { 1902 struct nfs4_ace *ace; 1903 1904 if (acl == NULL) { 1905 if ((buflen -= 4) < 0) 1906 goto out_resource; 1907 1908 WRITE32(0); 1909 goto out_acl; 1910 } 1911 if ((buflen -= 4) < 0) 1912 goto out_resource; 1913 WRITE32(acl->naces); 1914 1915 for (ace = acl->aces; ace < acl->aces + acl->naces; ace++) { 1916 if ((buflen -= 4*3) < 0) 1917 goto out_resource; 1918 WRITE32(ace->type); 1919 WRITE32(ace->flag); 1920 WRITE32(ace->access_mask & NFS4_ACE_MASK_ALL); 1921 status = nfsd4_encode_aclname(rqstp, ace->whotype, 1922 ace->who, ace->flag & NFS4_ACE_IDENTIFIER_GROUP, 1923 &p, &buflen); 1924 if (status == nfserr_resource) 1925 goto out_resource; 1926 if (status) 1927 goto out; 1928 } 1929 } 1930out_acl: 1931 if (bmval0 & FATTR4_WORD0_ACLSUPPORT) { 1932 if ((buflen -= 4) < 0) 1933 goto out_resource; 1934 WRITE32(aclsupport ? 1935 ACL4_SUPPORT_ALLOW_ACL|ACL4_SUPPORT_DENY_ACL : 0); 1936 } 1937 if (bmval0 & FATTR4_WORD0_CANSETTIME) { 1938 if ((buflen -= 4) < 0) 1939 goto out_resource; 1940 WRITE32(1); 1941 } 1942 if (bmval0 & FATTR4_WORD0_CASE_INSENSITIVE) { 1943 if ((buflen -= 4) < 0) 1944 goto out_resource; 1945 WRITE32(1); 1946 } 1947 if (bmval0 & FATTR4_WORD0_CASE_PRESERVING) { 1948 if ((buflen -= 4) < 0) 1949 goto out_resource; 1950 WRITE32(1); 1951 } 1952 if (bmval0 & FATTR4_WORD0_CHOWN_RESTRICTED) { 1953 if ((buflen -= 4) < 0) 1954 goto out_resource; 1955 WRITE32(1); 1956 } 1957 if (bmval0 & FATTR4_WORD0_FILEHANDLE) { 1958 buflen -= (XDR_QUADLEN(fhp->fh_handle.fh_size) << 2) + 4; 1959 if (buflen < 0) 1960 goto out_resource; 1961 WRITE32(fhp->fh_handle.fh_size); 1962 WRITEMEM(&fhp->fh_handle.fh_base, fhp->fh_handle.fh_size); 1963 } 1964 if (bmval0 & FATTR4_WORD0_FILEID) { 1965 if ((buflen -= 8) < 0) 1966 goto out_resource; 1967 WRITE64(stat.ino); 1968 } 1969 if (bmval0 & FATTR4_WORD0_FILES_AVAIL) { 1970 if ((buflen -= 8) < 0) 1971 goto out_resource; 1972 WRITE64((u64) statfs.f_ffree); 1973 } 1974 if (bmval0 & FATTR4_WORD0_FILES_FREE) { 1975 if ((buflen -= 8) < 0) 1976 goto out_resource; 1977 WRITE64((u64) statfs.f_ffree); 1978 } 1979 if (bmval0 & FATTR4_WORD0_FILES_TOTAL) { 1980 if ((buflen -= 8) < 0) 1981 goto out_resource; 1982 WRITE64((u64) statfs.f_files); 1983 } 1984 if (bmval0 & FATTR4_WORD0_FS_LOCATIONS) { 1985 status = nfsd4_encode_fs_locations(rqstp, exp, &p, &buflen); 1986 if (status == nfserr_resource) 1987 goto out_resource; 1988 if (status) 1989 goto out; 1990 } 1991 if (bmval0 & FATTR4_WORD0_HOMOGENEOUS) { 1992 if ((buflen -= 4) < 0) 1993 goto out_resource; 1994 WRITE32(1); 1995 } 1996 if (bmval0 & FATTR4_WORD0_MAXFILESIZE) { 1997 if ((buflen -= 8) < 0) 1998 goto out_resource; 1999 WRITE64(~(u64)0); 2000 } 2001 if (bmval0 & FATTR4_WORD0_MAXLINK) { 2002 if ((buflen -= 4) < 0) 2003 goto out_resource; 2004 WRITE32(255); 2005 } 2006 if (bmval0 & FATTR4_WORD0_MAXNAME) { 2007 if ((buflen -= 4) < 0) 2008 goto out_resource; 2009 WRITE32(statfs.f_namelen); 2010 } 2011 if (bmval0 & FATTR4_WORD0_MAXREAD) { 2012 if ((buflen -= 8) < 0) 2013 goto out_resource; 2014 WRITE64((u64) svc_max_payload(rqstp)); 2015 } 2016 if (bmval0 & FATTR4_WORD0_MAXWRITE) { 2017 if ((buflen -= 8) < 0) 2018 goto out_resource; 2019 WRITE64((u64) svc_max_payload(rqstp)); 2020 } 2021 if (bmval1 & FATTR4_WORD1_MODE) { 2022 if ((buflen -= 4) < 0) 2023 goto out_resource; 2024 WRITE32(stat.mode & S_IALLUGO); 2025 } 2026 if (bmval1 & FATTR4_WORD1_NO_TRUNC) { 2027 if ((buflen -= 4) < 0) 2028 goto out_resource; 2029 WRITE32(1); 2030 } 2031 if (bmval1 & FATTR4_WORD1_NUMLINKS) { 2032 if ((buflen -= 4) < 0) 2033 goto out_resource; 2034 WRITE32(stat.nlink); 2035 } 2036 if (bmval1 & FATTR4_WORD1_OWNER) { 2037 status = nfsd4_encode_user(rqstp, stat.uid, &p, &buflen); 2038 if (status == nfserr_resource) 2039 goto out_resource; 2040 if (status) 2041 goto out; 2042 } 2043 if (bmval1 & FATTR4_WORD1_OWNER_GROUP) { 2044 status = nfsd4_encode_group(rqstp, stat.gid, &p, &buflen); 2045 if (status == nfserr_resource) 2046 goto out_resource; 2047 if (status) 2048 goto out; 2049 } 2050 if (bmval1 & FATTR4_WORD1_RAWDEV) { 2051 if ((buflen -= 8) < 0) 2052 goto out_resource; 2053 WRITE32((u32) MAJOR(stat.rdev)); 2054 WRITE32((u32) MINOR(stat.rdev)); 2055 } 2056 if (bmval1 & FATTR4_WORD1_SPACE_AVAIL) { 2057 if ((buflen -= 8) < 0) 2058 goto out_resource; 2059 dummy64 = (u64)statfs.f_bavail * (u64)statfs.f_bsize; 2060 WRITE64(dummy64); 2061 } 2062 if (bmval1 & FATTR4_WORD1_SPACE_FREE) { 2063 if ((buflen -= 8) < 0) 2064 goto out_resource; 2065 dummy64 = (u64)statfs.f_bfree * (u64)statfs.f_bsize; 2066 WRITE64(dummy64); 2067 } 2068 if (bmval1 & FATTR4_WORD1_SPACE_TOTAL) { 2069 if ((buflen -= 8) < 0) 2070 goto out_resource; 2071 dummy64 = (u64)statfs.f_blocks * (u64)statfs.f_bsize; 2072 WRITE64(dummy64); 2073 } 2074 if (bmval1 & FATTR4_WORD1_SPACE_USED) { 2075 if ((buflen -= 8) < 0) 2076 goto out_resource; 2077 dummy64 = (u64)stat.blocks << 9; 2078 WRITE64(dummy64); 2079 } 2080 if (bmval1 & FATTR4_WORD1_TIME_ACCESS) { 2081 if ((buflen -= 12) < 0) 2082 goto out_resource; 2083 WRITE32(0); 2084 WRITE32(stat.atime.tv_sec); 2085 WRITE32(stat.atime.tv_nsec); 2086 } 2087 if (bmval1 & FATTR4_WORD1_TIME_DELTA) { 2088 if ((buflen -= 12) < 0) 2089 goto out_resource; 2090 WRITE32(0); 2091 WRITE32(1); 2092 WRITE32(0); 2093 } 2094 if (bmval1 & FATTR4_WORD1_TIME_METADATA) { 2095 if ((buflen -= 12) < 0) 2096 goto out_resource; 2097 WRITE32(0); 2098 WRITE32(stat.ctime.tv_sec); 2099 WRITE32(stat.ctime.tv_nsec); 2100 } 2101 if (bmval1 & FATTR4_WORD1_TIME_MODIFY) { 2102 if ((buflen -= 12) < 0) 2103 goto out_resource; 2104 WRITE32(0); 2105 WRITE32(stat.mtime.tv_sec); 2106 WRITE32(stat.mtime.tv_nsec); 2107 } 2108 if (bmval1 & FATTR4_WORD1_MOUNTED_ON_FILEID) { 2109 if ((buflen -= 8) < 0) 2110 goto out_resource; 2111 /* 2112 * Get parent's attributes if not ignoring crossmount 2113 * and this is the root of a cross-mounted filesystem. 2114 */ 2115 if (ignore_crossmnt == 0 && 2116 dentry == exp->ex_path.mnt->mnt_root) { 2117 struct path path = exp->ex_path; 2118 path_get(&path); 2119 while (follow_up(&path)) { 2120 if (path.dentry != path.mnt->mnt_root) 2121 break; 2122 } 2123 err = vfs_getattr(path.mnt, path.dentry, &stat); 2124 path_put(&path); 2125 if (err) 2126 goto out_nfserr; 2127 } 2128 WRITE64(stat.ino); 2129 } 2130 if (bmval2 & FATTR4_WORD2_SUPPATTR_EXCLCREAT) { 2131 WRITE32(3); 2132 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD0); 2133 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD1); 2134 WRITE32(NFSD_SUPPATTR_EXCLCREAT_WORD2); 2135 } 2136 2137 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2138 *countp = p - buffer; 2139 status = nfs_ok; 2140 2141out: 2142 kfree(acl); 2143 if (fhp == &tempfh) 2144 fh_put(&tempfh); 2145 return status; 2146out_nfserr: 2147 status = nfserrno(err); 2148 goto out; 2149out_resource: 2150 *countp = 0; 2151 status = nfserr_resource; 2152 goto out; 2153out_serverfault: 2154 status = nfserr_serverfault; 2155 goto out; 2156} 2157 2158static inline int attributes_need_mount(u32 *bmval) 2159{ 2160 if (bmval[0] & ~(FATTR4_WORD0_RDATTR_ERROR | FATTR4_WORD0_LEASE_TIME)) 2161 return 1; 2162 if (bmval[1] & ~FATTR4_WORD1_MOUNTED_ON_FILEID) 2163 return 1; 2164 return 0; 2165} 2166 2167static __be32 2168nfsd4_encode_dirent_fattr(struct nfsd4_readdir *cd, 2169 const char *name, int namlen, __be32 *p, int *buflen) 2170{ 2171 struct svc_export *exp = cd->rd_fhp->fh_export; 2172 struct dentry *dentry; 2173 __be32 nfserr; 2174 int ignore_crossmnt = 0; 2175 2176 dentry = lookup_one_len(name, cd->rd_fhp->fh_dentry, namlen); 2177 if (IS_ERR(dentry)) 2178 return nfserrno(PTR_ERR(dentry)); 2179 if (!dentry->d_inode) { 2180 /* 2181 * nfsd_buffered_readdir drops the i_mutex between 2182 * readdir and calling this callback, leaving a window 2183 * where this directory entry could have gone away. 2184 */ 2185 dput(dentry); 2186 return nfserr_noent; 2187 } 2188 2189 exp_get(exp); 2190 /* 2191 * In the case of a mountpoint, the client may be asking for 2192 * attributes that are only properties of the underlying filesystem 2193 * as opposed to the cross-mounted file system. In such a case, 2194 * we will not follow the cross mount and will fill the attribtutes 2195 * directly from the mountpoint dentry. 2196 */ 2197 if (nfsd_mountpoint(dentry, exp)) { 2198 int err; 2199 2200 if (!(exp->ex_flags & NFSEXP_V4ROOT) 2201 && !attributes_need_mount(cd->rd_bmval)) { 2202 ignore_crossmnt = 1; 2203 goto out_encode; 2204 } 2205 /* 2206 * Why the heck aren't we just using nfsd_lookup?? 2207 * Different "."/".." handling? Something else? 2208 * At least, add a comment here to explain.... 2209 */ 2210 err = nfsd_cross_mnt(cd->rd_rqstp, &dentry, &exp); 2211 if (err) { 2212 nfserr = nfserrno(err); 2213 goto out_put; 2214 } 2215 nfserr = check_nfsd_access(exp, cd->rd_rqstp); 2216 if (nfserr) 2217 goto out_put; 2218 2219 } 2220out_encode: 2221 nfserr = nfsd4_encode_fattr(NULL, exp, dentry, p, buflen, cd->rd_bmval, 2222 cd->rd_rqstp, ignore_crossmnt); 2223out_put: 2224 dput(dentry); 2225 exp_put(exp); 2226 return nfserr; 2227} 2228 2229static __be32 * 2230nfsd4_encode_rdattr_error(__be32 *p, int buflen, __be32 nfserr) 2231{ 2232 __be32 *attrlenp; 2233 2234 if (buflen < 6) 2235 return NULL; 2236 *p++ = htonl(2); 2237 *p++ = htonl(FATTR4_WORD0_RDATTR_ERROR); /* bmval0 */ 2238 *p++ = htonl(0); /* bmval1 */ 2239 2240 attrlenp = p++; 2241 *p++ = nfserr; /* no htonl */ 2242 *attrlenp = htonl((char *)p - (char *)attrlenp - 4); 2243 return p; 2244} 2245 2246static int 2247nfsd4_encode_dirent(void *ccdv, const char *name, int namlen, 2248 loff_t offset, u64 ino, unsigned int d_type) 2249{ 2250 struct readdir_cd *ccd = ccdv; 2251 struct nfsd4_readdir *cd = container_of(ccd, struct nfsd4_readdir, common); 2252 int buflen; 2253 __be32 *p = cd->buffer; 2254 __be32 *cookiep; 2255 __be32 nfserr = nfserr_toosmall; 2256 2257 /* In nfsv4, "." and ".." never make it onto the wire.. */ 2258 if (name && isdotent(name, namlen)) { 2259 cd->common.err = nfs_ok; 2260 return 0; 2261 } 2262 2263 if (cd->offset) 2264 xdr_encode_hyper(cd->offset, (u64) offset); 2265 2266 buflen = cd->buflen - 4 - XDR_QUADLEN(namlen); 2267 if (buflen < 0) 2268 goto fail; 2269 2270 *p++ = xdr_one; /* mark entry present */ 2271 cookiep = p; 2272 p = xdr_encode_hyper(p, NFS_OFFSET_MAX); /* offset of next entry */ 2273 p = xdr_encode_array(p, name, namlen); /* name length & name */ 2274 2275 nfserr = nfsd4_encode_dirent_fattr(cd, name, namlen, p, &buflen); 2276 switch (nfserr) { 2277 case nfs_ok: 2278 p += buflen; 2279 break; 2280 case nfserr_resource: 2281 nfserr = nfserr_toosmall; 2282 goto fail; 2283 case nfserr_dropit: 2284 goto fail; 2285 case nfserr_noent: 2286 goto skip_entry; 2287 default: 2288 /* 2289 * If the client requested the RDATTR_ERROR attribute, 2290 * we stuff the error code into this attribute 2291 * and continue. If this attribute was not requested, 2292 * then in accordance with the spec, we fail the 2293 * entire READDIR operation(!) 2294 */ 2295 if (!(cd->rd_bmval[0] & FATTR4_WORD0_RDATTR_ERROR)) 2296 goto fail; 2297 p = nfsd4_encode_rdattr_error(p, buflen, nfserr); 2298 if (p == NULL) { 2299 nfserr = nfserr_toosmall; 2300 goto fail; 2301 } 2302 } 2303 cd->buflen -= (p - cd->buffer); 2304 cd->buffer = p; 2305 cd->offset = cookiep; 2306skip_entry: 2307 cd->common.err = nfs_ok; 2308 return 0; 2309fail: 2310 cd->common.err = nfserr; 2311 return -EINVAL; 2312} 2313 2314static void 2315nfsd4_encode_stateid(struct nfsd4_compoundres *resp, stateid_t *sid) 2316{ 2317 __be32 *p; 2318 2319 RESERVE_SPACE(sizeof(stateid_t)); 2320 WRITE32(sid->si_generation); 2321 WRITEMEM(&sid->si_opaque, sizeof(stateid_opaque_t)); 2322 ADJUST_ARGS(); 2323} 2324 2325static __be32 2326nfsd4_encode_access(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_access *access) 2327{ 2328 __be32 *p; 2329 2330 if (!nfserr) { 2331 RESERVE_SPACE(8); 2332 WRITE32(access->ac_supported); 2333 WRITE32(access->ac_resp_access); 2334 ADJUST_ARGS(); 2335 } 2336 return nfserr; 2337} 2338 2339static __be32 2340nfsd4_encode_close(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_close *close) 2341{ 2342 ENCODE_SEQID_OP_HEAD; 2343 2344 if (!nfserr) 2345 nfsd4_encode_stateid(resp, &close->cl_stateid); 2346 2347 ENCODE_SEQID_OP_TAIL(close->cl_stateowner); 2348 return nfserr; 2349} 2350 2351 2352static __be32 2353nfsd4_encode_commit(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_commit *commit) 2354{ 2355 __be32 *p; 2356 2357 if (!nfserr) { 2358 RESERVE_SPACE(8); 2359 WRITEMEM(commit->co_verf.data, 8); 2360 ADJUST_ARGS(); 2361 } 2362 return nfserr; 2363} 2364 2365static __be32 2366nfsd4_encode_create(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_create *create) 2367{ 2368 __be32 *p; 2369 2370 if (!nfserr) { 2371 RESERVE_SPACE(32); 2372 write_cinfo(&p, &create->cr_cinfo); 2373 WRITE32(2); 2374 WRITE32(create->cr_bmval[0]); 2375 WRITE32(create->cr_bmval[1]); 2376 ADJUST_ARGS(); 2377 } 2378 return nfserr; 2379} 2380 2381static __be32 2382nfsd4_encode_getattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_getattr *getattr) 2383{ 2384 struct svc_fh *fhp = getattr->ga_fhp; 2385 int buflen; 2386 2387 if (nfserr) 2388 return nfserr; 2389 2390 buflen = resp->end - resp->p - (COMPOUND_ERR_SLACK_SPACE >> 2); 2391 nfserr = nfsd4_encode_fattr(fhp, fhp->fh_export, fhp->fh_dentry, 2392 resp->p, &buflen, getattr->ga_bmval, 2393 resp->rqstp, 0); 2394 if (!nfserr) 2395 resp->p += buflen; 2396 return nfserr; 2397} 2398 2399static __be32 2400nfsd4_encode_getfh(struct nfsd4_compoundres *resp, __be32 nfserr, struct svc_fh **fhpp) 2401{ 2402 struct svc_fh *fhp = *fhpp; 2403 unsigned int len; 2404 __be32 *p; 2405 2406 if (!nfserr) { 2407 len = fhp->fh_handle.fh_size; 2408 RESERVE_SPACE(len + 4); 2409 WRITE32(len); 2410 WRITEMEM(&fhp->fh_handle.fh_base, len); 2411 ADJUST_ARGS(); 2412 } 2413 return nfserr; 2414} 2415 2416/* 2417* Including all fields other than the name, a LOCK4denied structure requires 2418* 8(clientid) + 4(namelen) + 8(offset) + 8(length) + 4(type) = 32 bytes. 2419*/ 2420static void 2421nfsd4_encode_lock_denied(struct nfsd4_compoundres *resp, struct nfsd4_lock_denied *ld) 2422{ 2423 __be32 *p; 2424 2425 RESERVE_SPACE(32 + XDR_LEN(ld->ld_sop ? ld->ld_sop->so_owner.len : 0)); 2426 WRITE64(ld->ld_start); 2427 WRITE64(ld->ld_length); 2428 WRITE32(ld->ld_type); 2429 if (ld->ld_sop) { 2430 WRITEMEM(&ld->ld_clientid, 8); 2431 WRITE32(ld->ld_sop->so_owner.len); 2432 WRITEMEM(ld->ld_sop->so_owner.data, ld->ld_sop->so_owner.len); 2433 kref_put(&ld->ld_sop->so_ref, nfs4_free_stateowner); 2434 } else { /* non - nfsv4 lock in conflict, no clientid nor owner */ 2435 WRITE64((u64)0); /* clientid */ 2436 WRITE32(0); /* length of owner name */ 2437 } 2438 ADJUST_ARGS(); 2439} 2440 2441static __be32 2442nfsd4_encode_lock(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lock *lock) 2443{ 2444 ENCODE_SEQID_OP_HEAD; 2445 2446 if (!nfserr) 2447 nfsd4_encode_stateid(resp, &lock->lk_resp_stateid); 2448 else if (nfserr == nfserr_denied) 2449 nfsd4_encode_lock_denied(resp, &lock->lk_denied); 2450 2451 ENCODE_SEQID_OP_TAIL(lock->lk_replay_owner); 2452 return nfserr; 2453} 2454 2455static __be32 2456nfsd4_encode_lockt(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_lockt *lockt) 2457{ 2458 if (nfserr == nfserr_denied) 2459 nfsd4_encode_lock_denied(resp, &lockt->lt_denied); 2460 return nfserr; 2461} 2462 2463static __be32 2464nfsd4_encode_locku(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_locku *locku) 2465{ 2466 ENCODE_SEQID_OP_HEAD; 2467 2468 if (!nfserr) 2469 nfsd4_encode_stateid(resp, &locku->lu_stateid); 2470 2471 ENCODE_SEQID_OP_TAIL(locku->lu_stateowner); 2472 return nfserr; 2473} 2474 2475 2476static __be32 2477nfsd4_encode_link(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_link *link) 2478{ 2479 __be32 *p; 2480 2481 if (!nfserr) { 2482 RESERVE_SPACE(20); 2483 write_cinfo(&p, &link->li_cinfo); 2484 ADJUST_ARGS(); 2485 } 2486 return nfserr; 2487} 2488 2489 2490static __be32 2491nfsd4_encode_open(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open *open) 2492{ 2493 __be32 *p; 2494 ENCODE_SEQID_OP_HEAD; 2495 2496 if (nfserr) 2497 goto out; 2498 2499 nfsd4_encode_stateid(resp, &open->op_stateid); 2500 RESERVE_SPACE(40); 2501 write_cinfo(&p, &open->op_cinfo); 2502 WRITE32(open->op_rflags); 2503 WRITE32(2); 2504 WRITE32(open->op_bmval[0]); 2505 WRITE32(open->op_bmval[1]); 2506 WRITE32(open->op_delegate_type); 2507 ADJUST_ARGS(); 2508 2509 switch (open->op_delegate_type) { 2510 case NFS4_OPEN_DELEGATE_NONE: 2511 break; 2512 case NFS4_OPEN_DELEGATE_READ: 2513 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2514 RESERVE_SPACE(20); 2515 WRITE32(open->op_recall); 2516 2517 /* 2518 * TODO: ACE's in delegations 2519 */ 2520 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2521 WRITE32(0); 2522 WRITE32(0); 2523 WRITE32(0); 2524 ADJUST_ARGS(); 2525 break; 2526 case NFS4_OPEN_DELEGATE_WRITE: 2527 nfsd4_encode_stateid(resp, &open->op_delegate_stateid); 2528 RESERVE_SPACE(32); 2529 WRITE32(0); 2530 2531 /* 2532 * TODO: space_limit's in delegations 2533 */ 2534 WRITE32(NFS4_LIMIT_SIZE); 2535 WRITE32(~(u32)0); 2536 WRITE32(~(u32)0); 2537 2538 /* 2539 * TODO: ACE's in delegations 2540 */ 2541 WRITE32(NFS4_ACE_ACCESS_ALLOWED_ACE_TYPE); 2542 WRITE32(0); 2543 WRITE32(0); 2544 WRITE32(0); 2545 ADJUST_ARGS(); 2546 break; 2547 default: 2548 BUG(); 2549 } 2550out: 2551 ENCODE_SEQID_OP_TAIL(open->op_stateowner); 2552 return nfserr; 2553} 2554 2555static __be32 2556nfsd4_encode_open_confirm(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_confirm *oc) 2557{ 2558 ENCODE_SEQID_OP_HEAD; 2559 2560 if (!nfserr) 2561 nfsd4_encode_stateid(resp, &oc->oc_resp_stateid); 2562 2563 ENCODE_SEQID_OP_TAIL(oc->oc_stateowner); 2564 return nfserr; 2565} 2566 2567static __be32 2568nfsd4_encode_open_downgrade(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_open_downgrade *od) 2569{ 2570 ENCODE_SEQID_OP_HEAD; 2571 2572 if (!nfserr) 2573 nfsd4_encode_stateid(resp, &od->od_stateid); 2574 2575 ENCODE_SEQID_OP_TAIL(od->od_stateowner); 2576 return nfserr; 2577} 2578 2579static __be32 2580nfsd4_encode_read(struct nfsd4_compoundres *resp, __be32 nfserr, 2581 struct nfsd4_read *read) 2582{ 2583 u32 eof; 2584 int v, pn; 2585 unsigned long maxcount; 2586 long len; 2587 __be32 *p; 2588 2589 if (nfserr) 2590 return nfserr; 2591 if (resp->xbuf->page_len) 2592 return nfserr_resource; 2593 2594 RESERVE_SPACE(8); /* eof flag and byte count */ 2595 2596 maxcount = svc_max_payload(resp->rqstp); 2597 if (maxcount > read->rd_length) 2598 maxcount = read->rd_length; 2599 2600 len = maxcount; 2601 v = 0; 2602 while (len > 0) { 2603 pn = resp->rqstp->rq_resused++; 2604 resp->rqstp->rq_vec[v].iov_base = 2605 page_address(resp->rqstp->rq_respages[pn]); 2606 resp->rqstp->rq_vec[v].iov_len = 2607 len < PAGE_SIZE ? len : PAGE_SIZE; 2608 v++; 2609 len -= PAGE_SIZE; 2610 } 2611 read->rd_vlen = v; 2612 2613 nfserr = nfsd_read_file(read->rd_rqstp, read->rd_fhp, read->rd_filp, 2614 read->rd_offset, resp->rqstp->rq_vec, read->rd_vlen, 2615 &maxcount); 2616 2617 if (nfserr == nfserr_symlink) 2618 nfserr = nfserr_inval; 2619 if (nfserr) 2620 return nfserr; 2621 eof = (read->rd_offset + maxcount >= 2622 read->rd_fhp->fh_dentry->d_inode->i_size); 2623 2624 WRITE32(eof); 2625 WRITE32(maxcount); 2626 ADJUST_ARGS(); 2627 resp->xbuf->head[0].iov_len = (char*)p 2628 - (char*)resp->xbuf->head[0].iov_base; 2629 resp->xbuf->page_len = maxcount; 2630 2631 /* Use rest of head for padding and remaining ops: */ 2632 resp->xbuf->tail[0].iov_base = p; 2633 resp->xbuf->tail[0].iov_len = 0; 2634 if (maxcount&3) { 2635 RESERVE_SPACE(4); 2636 WRITE32(0); 2637 resp->xbuf->tail[0].iov_base += maxcount&3; 2638 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2639 ADJUST_ARGS(); 2640 } 2641 return 0; 2642} 2643 2644static __be32 2645nfsd4_encode_readlink(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readlink *readlink) 2646{ 2647 int maxcount; 2648 char *page; 2649 __be32 *p; 2650 2651 if (nfserr) 2652 return nfserr; 2653 if (resp->xbuf->page_len) 2654 return nfserr_resource; 2655 2656 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2657 2658 maxcount = PAGE_SIZE; 2659 RESERVE_SPACE(4); 2660 2661 nfserr = nfsd_readlink(readlink->rl_rqstp, readlink->rl_fhp, page, &maxcount); 2662 if (nfserr == nfserr_isdir) 2663 return nfserr_inval; 2664 if (nfserr) 2665 return nfserr; 2666 2667 WRITE32(maxcount); 2668 ADJUST_ARGS(); 2669 resp->xbuf->head[0].iov_len = (char*)p 2670 - (char*)resp->xbuf->head[0].iov_base; 2671 resp->xbuf->page_len = maxcount; 2672 2673 /* Use rest of head for padding and remaining ops: */ 2674 resp->xbuf->tail[0].iov_base = p; 2675 resp->xbuf->tail[0].iov_len = 0; 2676 if (maxcount&3) { 2677 RESERVE_SPACE(4); 2678 WRITE32(0); 2679 resp->xbuf->tail[0].iov_base += maxcount&3; 2680 resp->xbuf->tail[0].iov_len = 4 - (maxcount&3); 2681 ADJUST_ARGS(); 2682 } 2683 return 0; 2684} 2685 2686static __be32 2687nfsd4_encode_readdir(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_readdir *readdir) 2688{ 2689 int maxcount; 2690 loff_t offset; 2691 __be32 *page, *savep, *tailbase; 2692 __be32 *p; 2693 2694 if (nfserr) 2695 return nfserr; 2696 if (resp->xbuf->page_len) 2697 return nfserr_resource; 2698 2699 RESERVE_SPACE(8); /* verifier */ 2700 savep = p; 2701 2702 WRITE32(0); 2703 WRITE32(0); 2704 ADJUST_ARGS(); 2705 resp->xbuf->head[0].iov_len = ((char*)resp->p) - (char*)resp->xbuf->head[0].iov_base; 2706 tailbase = p; 2707 2708 maxcount = PAGE_SIZE; 2709 if (maxcount > readdir->rd_maxcount) 2710 maxcount = readdir->rd_maxcount; 2711 2712 /* 2713 * Convert from bytes to words, account for the two words already 2714 * written, make sure to leave two words at the end for the next 2715 * pointer and eof field. 2716 */ 2717 maxcount = (maxcount >> 2) - 4; 2718 if (maxcount < 0) { 2719 nfserr = nfserr_toosmall; 2720 goto err_no_verf; 2721 } 2722 2723 page = page_address(resp->rqstp->rq_respages[resp->rqstp->rq_resused++]); 2724 readdir->common.err = 0; 2725 readdir->buflen = maxcount; 2726 readdir->buffer = page; 2727 readdir->offset = NULL; 2728 2729 offset = readdir->rd_cookie; 2730 nfserr = nfsd_readdir(readdir->rd_rqstp, readdir->rd_fhp, 2731 &offset, 2732 &readdir->common, nfsd4_encode_dirent); 2733 if (nfserr == nfs_ok && 2734 readdir->common.err == nfserr_toosmall && 2735 readdir->buffer == page) 2736 nfserr = nfserr_toosmall; 2737 if (nfserr == nfserr_symlink) 2738 nfserr = nfserr_notdir; 2739 if (nfserr) 2740 goto err_no_verf; 2741 2742 if (readdir->offset) 2743 xdr_encode_hyper(readdir->offset, offset); 2744 2745 p = readdir->buffer; 2746 *p++ = 0; /* no more entries */ 2747 *p++ = htonl(readdir->common.err == nfserr_eof); 2748 resp->xbuf->page_len = ((char*)p) - (char*)page_address( 2749 resp->rqstp->rq_respages[resp->rqstp->rq_resused-1]); 2750 2751 /* Use rest of head for padding and remaining ops: */ 2752 resp->xbuf->tail[0].iov_base = tailbase; 2753 resp->xbuf->tail[0].iov_len = 0; 2754 resp->p = resp->xbuf->tail[0].iov_base; 2755 resp->end = resp->p + (PAGE_SIZE - resp->xbuf->head[0].iov_len)/4; 2756 2757 return 0; 2758err_no_verf: 2759 p = savep; 2760 ADJUST_ARGS(); 2761 return nfserr; 2762} 2763 2764static __be32 2765nfsd4_encode_remove(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_remove *remove) 2766{ 2767 __be32 *p; 2768 2769 if (!nfserr) { 2770 RESERVE_SPACE(20); 2771 write_cinfo(&p, &remove->rm_cinfo); 2772 ADJUST_ARGS(); 2773 } 2774 return nfserr; 2775} 2776 2777static __be32 2778nfsd4_encode_rename(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_rename *rename) 2779{ 2780 __be32 *p; 2781 2782 if (!nfserr) { 2783 RESERVE_SPACE(40); 2784 write_cinfo(&p, &rename->rn_sinfo); 2785 write_cinfo(&p, &rename->rn_tinfo); 2786 ADJUST_ARGS(); 2787 } 2788 return nfserr; 2789} 2790 2791static __be32 2792nfsd4_encode_secinfo(struct nfsd4_compoundres *resp, __be32 nfserr, 2793 struct nfsd4_secinfo *secinfo) 2794{ 2795 int i = 0; 2796 struct svc_export *exp = secinfo->si_exp; 2797 u32 nflavs; 2798 struct exp_flavor_info *flavs; 2799 struct exp_flavor_info def_flavs[2]; 2800 __be32 *p; 2801 2802 if (nfserr) 2803 goto out; 2804 if (exp->ex_nflavors) { 2805 flavs = exp->ex_flavors; 2806 nflavs = exp->ex_nflavors; 2807 } else { /* Handling of some defaults in absence of real secinfo: */ 2808 flavs = def_flavs; 2809 if (exp->ex_client->flavour->flavour == RPC_AUTH_UNIX) { 2810 nflavs = 2; 2811 flavs[0].pseudoflavor = RPC_AUTH_UNIX; 2812 flavs[1].pseudoflavor = RPC_AUTH_NULL; 2813 } else if (exp->ex_client->flavour->flavour == RPC_AUTH_GSS) { 2814 nflavs = 1; 2815 flavs[0].pseudoflavor 2816 = svcauth_gss_flavor(exp->ex_client); 2817 } else { 2818 nflavs = 1; 2819 flavs[0].pseudoflavor 2820 = exp->ex_client->flavour->flavour; 2821 } 2822 } 2823 2824 RESERVE_SPACE(4); 2825 WRITE32(nflavs); 2826 ADJUST_ARGS(); 2827 for (i = 0; i < nflavs; i++) { 2828 u32 flav = flavs[i].pseudoflavor; 2829 struct gss_api_mech *gm = gss_mech_get_by_pseudoflavor(flav); 2830 2831 if (gm) { 2832 RESERVE_SPACE(4); 2833 WRITE32(RPC_AUTH_GSS); 2834 ADJUST_ARGS(); 2835 RESERVE_SPACE(4 + gm->gm_oid.len); 2836 WRITE32(gm->gm_oid.len); 2837 WRITEMEM(gm->gm_oid.data, gm->gm_oid.len); 2838 ADJUST_ARGS(); 2839 RESERVE_SPACE(4); 2840 WRITE32(0); /* qop */ 2841 ADJUST_ARGS(); 2842 RESERVE_SPACE(4); 2843 WRITE32(gss_pseudoflavor_to_service(gm, flav)); 2844 ADJUST_ARGS(); 2845 gss_mech_put(gm); 2846 } else { 2847 RESERVE_SPACE(4); 2848 WRITE32(flav); 2849 ADJUST_ARGS(); 2850 } 2851 } 2852out: 2853 if (exp) 2854 exp_put(exp); 2855 return nfserr; 2856} 2857 2858/* 2859 * The SETATTR encode routine is special -- it always encodes a bitmap, 2860 * regardless of the error status. 2861 */ 2862static __be32 2863nfsd4_encode_setattr(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setattr *setattr) 2864{ 2865 __be32 *p; 2866 2867 RESERVE_SPACE(12); 2868 if (nfserr) { 2869 WRITE32(2); 2870 WRITE32(0); 2871 WRITE32(0); 2872 } 2873 else { 2874 WRITE32(2); 2875 WRITE32(setattr->sa_bmval[0]); 2876 WRITE32(setattr->sa_bmval[1]); 2877 } 2878 ADJUST_ARGS(); 2879 return nfserr; 2880} 2881 2882static __be32 2883nfsd4_encode_setclientid(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_setclientid *scd) 2884{ 2885 __be32 *p; 2886 2887 if (!nfserr) { 2888 RESERVE_SPACE(8 + sizeof(nfs4_verifier)); 2889 WRITEMEM(&scd->se_clientid, 8); 2890 WRITEMEM(&scd->se_confirm, sizeof(nfs4_verifier)); 2891 ADJUST_ARGS(); 2892 } 2893 else if (nfserr == nfserr_clid_inuse) { 2894 RESERVE_SPACE(8); 2895 WRITE32(0); 2896 WRITE32(0); 2897 ADJUST_ARGS(); 2898 } 2899 return nfserr; 2900} 2901 2902static __be32 2903nfsd4_encode_write(struct nfsd4_compoundres *resp, __be32 nfserr, struct nfsd4_write *write) 2904{ 2905 __be32 *p; 2906 2907 if (!nfserr) { 2908 RESERVE_SPACE(16); 2909 WRITE32(write->wr_bytes_written); 2910 WRITE32(write->wr_how_written); 2911 WRITEMEM(write->wr_verifier.data, 8); 2912 ADJUST_ARGS(); 2913 } 2914 return nfserr; 2915} 2916 2917static __be32 2918nfsd4_encode_exchange_id(struct nfsd4_compoundres *resp, int nfserr, 2919 struct nfsd4_exchange_id *exid) 2920{ 2921 __be32 *p; 2922 char *major_id; 2923 char *server_scope; 2924 int major_id_sz; 2925 int server_scope_sz; 2926 uint64_t minor_id = 0; 2927 2928 if (nfserr) 2929 return nfserr; 2930 2931 major_id = utsname()->nodename; 2932 major_id_sz = strlen(major_id); 2933 server_scope = utsname()->nodename; 2934 server_scope_sz = strlen(server_scope); 2935 2936 RESERVE_SPACE( 2937 8 /* eir_clientid */ + 2938 4 /* eir_sequenceid */ + 2939 4 /* eir_flags */ + 2940 4 /* spr_how (SP4_NONE) */ + 2941 8 /* so_minor_id */ + 2942 4 /* so_major_id.len */ + 2943 (XDR_QUADLEN(major_id_sz) * 4) + 2944 4 /* eir_server_scope.len */ + 2945 (XDR_QUADLEN(server_scope_sz) * 4) + 2946 4 /* eir_server_impl_id.count (0) */); 2947 2948 WRITEMEM(&exid->clientid, 8); 2949 WRITE32(exid->seqid); 2950 WRITE32(exid->flags); 2951 2952 /* state_protect4_r. Currently only support SP4_NONE */ 2953 BUG_ON(exid->spa_how != SP4_NONE); 2954 WRITE32(exid->spa_how); 2955 2956 /* The server_owner struct */ 2957 WRITE64(minor_id); /* Minor id */ 2958 /* major id */ 2959 WRITE32(major_id_sz); 2960 WRITEMEM(major_id, major_id_sz); 2961 2962 /* Server scope */ 2963 WRITE32(server_scope_sz); 2964 WRITEMEM(server_scope, server_scope_sz); 2965 2966 /* Implementation id */ 2967 WRITE32(0); /* zero length nfs_impl_id4 array */ 2968 ADJUST_ARGS(); 2969 return 0; 2970} 2971 2972static __be32 2973nfsd4_encode_create_session(struct nfsd4_compoundres *resp, int nfserr, 2974 struct nfsd4_create_session *sess) 2975{ 2976 __be32 *p; 2977 2978 if (nfserr) 2979 return nfserr; 2980 2981 RESERVE_SPACE(24); 2982 WRITEMEM(sess->sessionid.data, NFS4_MAX_SESSIONID_LEN); 2983 WRITE32(sess->seqid); 2984 WRITE32(sess->flags); 2985 ADJUST_ARGS(); 2986 2987 RESERVE_SPACE(28); 2988 WRITE32(0); /* headerpadsz */ 2989 WRITE32(sess->fore_channel.maxreq_sz); 2990 WRITE32(sess->fore_channel.maxresp_sz); 2991 WRITE32(sess->fore_channel.maxresp_cached); 2992 WRITE32(sess->fore_channel.maxops); 2993 WRITE32(sess->fore_channel.maxreqs); 2994 WRITE32(sess->fore_channel.nr_rdma_attrs); 2995 ADJUST_ARGS(); 2996 2997 if (sess->fore_channel.nr_rdma_attrs) { 2998 RESERVE_SPACE(4); 2999 WRITE32(sess->fore_channel.rdma_attrs); 3000 ADJUST_ARGS(); 3001 } 3002 3003 RESERVE_SPACE(28); 3004 WRITE32(0); /* headerpadsz */ 3005 WRITE32(sess->back_channel.maxreq_sz); 3006 WRITE32(sess->back_channel.maxresp_sz); 3007 WRITE32(sess->back_channel.maxresp_cached); 3008 WRITE32(sess->back_channel.maxops); 3009 WRITE32(sess->back_channel.maxreqs); 3010 WRITE32(sess->back_channel.nr_rdma_attrs); 3011 ADJUST_ARGS(); 3012 3013 if (sess->back_channel.nr_rdma_attrs) { 3014 RESERVE_SPACE(4); 3015 WRITE32(sess->back_channel.rdma_attrs); 3016 ADJUST_ARGS(); 3017 } 3018 return 0; 3019} 3020 3021static __be32 3022nfsd4_encode_destroy_session(struct nfsd4_compoundres *resp, int nfserr, 3023 struct nfsd4_destroy_session *destroy_session) 3024{ 3025 return nfserr; 3026} 3027 3028__be32 3029nfsd4_encode_sequence(struct nfsd4_compoundres *resp, int nfserr, 3030 struct nfsd4_sequence *seq) 3031{ 3032 __be32 *p; 3033 3034 if (nfserr) 3035 return nfserr; 3036 3037 RESERVE_SPACE(NFS4_MAX_SESSIONID_LEN + 20); 3038 WRITEMEM(seq->sessionid.data, NFS4_MAX_SESSIONID_LEN); 3039 WRITE32(seq->seqid); 3040 WRITE32(seq->slotid); 3041 WRITE32(seq->maxslots); 3042 WRITE32(seq->maxslots); 3043 WRITE32(0); 3044 3045 ADJUST_ARGS(); 3046 resp->cstate.datap = p; /* DRC cache data pointer */ 3047 return 0; 3048} 3049 3050static __be32 3051nfsd4_encode_noop(struct nfsd4_compoundres *resp, __be32 nfserr, void *p) 3052{ 3053 return nfserr; 3054} 3055 3056typedef __be32(* nfsd4_enc)(struct nfsd4_compoundres *, __be32, void *); 3057 3058/* 3059 * Note: nfsd4_enc_ops vector is shared for v4.0 and v4.1 3060 * since we don't need to filter out obsolete ops as this is 3061 * done in the decoding phase. 3062 */ 3063static nfsd4_enc nfsd4_enc_ops[] = { 3064 [OP_ACCESS] = (nfsd4_enc)nfsd4_encode_access, 3065 [OP_CLOSE] = (nfsd4_enc)nfsd4_encode_close, 3066 [OP_COMMIT] = (nfsd4_enc)nfsd4_encode_commit, 3067 [OP_CREATE] = (nfsd4_enc)nfsd4_encode_create, 3068 [OP_DELEGPURGE] = (nfsd4_enc)nfsd4_encode_noop, 3069 [OP_DELEGRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3070 [OP_GETATTR] = (nfsd4_enc)nfsd4_encode_getattr, 3071 [OP_GETFH] = (nfsd4_enc)nfsd4_encode_getfh, 3072 [OP_LINK] = (nfsd4_enc)nfsd4_encode_link, 3073 [OP_LOCK] = (nfsd4_enc)nfsd4_encode_lock, 3074 [OP_LOCKT] = (nfsd4_enc)nfsd4_encode_lockt, 3075 [OP_LOCKU] = (nfsd4_enc)nfsd4_encode_locku, 3076 [OP_LOOKUP] = (nfsd4_enc)nfsd4_encode_noop, 3077 [OP_LOOKUPP] = (nfsd4_enc)nfsd4_encode_noop, 3078 [OP_NVERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3079 [OP_OPEN] = (nfsd4_enc)nfsd4_encode_open, 3080 [OP_OPENATTR] = (nfsd4_enc)nfsd4_encode_noop, 3081 [OP_OPEN_CONFIRM] = (nfsd4_enc)nfsd4_encode_open_confirm, 3082 [OP_OPEN_DOWNGRADE] = (nfsd4_enc)nfsd4_encode_open_downgrade, 3083 [OP_PUTFH] = (nfsd4_enc)nfsd4_encode_noop, 3084 [OP_PUTPUBFH] = (nfsd4_enc)nfsd4_encode_noop, 3085 [OP_PUTROOTFH] = (nfsd4_enc)nfsd4_encode_noop, 3086 [OP_READ] = (nfsd4_enc)nfsd4_encode_read, 3087 [OP_READDIR] = (nfsd4_enc)nfsd4_encode_readdir, 3088 [OP_READLINK] = (nfsd4_enc)nfsd4_encode_readlink, 3089 [OP_REMOVE] = (nfsd4_enc)nfsd4_encode_remove, 3090 [OP_RENAME] = (nfsd4_enc)nfsd4_encode_rename, 3091 [OP_RENEW] = (nfsd4_enc)nfsd4_encode_noop, 3092 [OP_RESTOREFH] = (nfsd4_enc)nfsd4_encode_noop, 3093 [OP_SAVEFH] = (nfsd4_enc)nfsd4_encode_noop, 3094 [OP_SECINFO] = (nfsd4_enc)nfsd4_encode_secinfo, 3095 [OP_SETATTR] = (nfsd4_enc)nfsd4_encode_setattr, 3096 [OP_SETCLIENTID] = (nfsd4_enc)nfsd4_encode_setclientid, 3097 [OP_SETCLIENTID_CONFIRM] = (nfsd4_enc)nfsd4_encode_noop, 3098 [OP_VERIFY] = (nfsd4_enc)nfsd4_encode_noop, 3099 [OP_WRITE] = (nfsd4_enc)nfsd4_encode_write, 3100 [OP_RELEASE_LOCKOWNER] = (nfsd4_enc)nfsd4_encode_noop, 3101 3102 /* NFSv4.1 operations */ 3103 [OP_BACKCHANNEL_CTL] = (nfsd4_enc)nfsd4_encode_noop, 3104 [OP_BIND_CONN_TO_SESSION] = (nfsd4_enc)nfsd4_encode_noop, 3105 [OP_EXCHANGE_ID] = (nfsd4_enc)nfsd4_encode_exchange_id, 3106 [OP_CREATE_SESSION] = (nfsd4_enc)nfsd4_encode_create_session, 3107 [OP_DESTROY_SESSION] = (nfsd4_enc)nfsd4_encode_destroy_session, 3108 [OP_FREE_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 3109 [OP_GET_DIR_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3110 [OP_GETDEVICEINFO] = (nfsd4_enc)nfsd4_encode_noop, 3111 [OP_GETDEVICELIST] = (nfsd4_enc)nfsd4_encode_noop, 3112 [OP_LAYOUTCOMMIT] = (nfsd4_enc)nfsd4_encode_noop, 3113 [OP_LAYOUTGET] = (nfsd4_enc)nfsd4_encode_noop, 3114 [OP_LAYOUTRETURN] = (nfsd4_enc)nfsd4_encode_noop, 3115 [OP_SECINFO_NO_NAME] = (nfsd4_enc)nfsd4_encode_noop, 3116 [OP_SEQUENCE] = (nfsd4_enc)nfsd4_encode_sequence, 3117 [OP_SET_SSV] = (nfsd4_enc)nfsd4_encode_noop, 3118 [OP_TEST_STATEID] = (nfsd4_enc)nfsd4_encode_noop, 3119 [OP_WANT_DELEGATION] = (nfsd4_enc)nfsd4_encode_noop, 3120 [OP_DESTROY_CLIENTID] = (nfsd4_enc)nfsd4_encode_noop, 3121 [OP_RECLAIM_COMPLETE] = (nfsd4_enc)nfsd4_encode_noop, 3122}; 3123 3124/* 3125 * Calculate the total amount of memory that the compound response has taken 3126 * after encoding the current operation. 3127 * 3128 * pad: add on 8 bytes for the next operation's op_code and status so that 3129 * there is room to cache a failure on the next operation. 3130 * 3131 * Compare this length to the session se_fmaxresp_cached. 3132 * 3133 * Our se_fmaxresp_cached will always be a multiple of PAGE_SIZE, and so 3134 * will be at least a page and will therefore hold the xdr_buf head. 3135 */ 3136static int nfsd4_check_drc_limit(struct nfsd4_compoundres *resp) 3137{ 3138 int status = 0; 3139 struct xdr_buf *xb = &resp->rqstp->rq_res; 3140 struct nfsd4_compoundargs *args = resp->rqstp->rq_argp; 3141 struct nfsd4_session *session = NULL; 3142 struct nfsd4_slot *slot = resp->cstate.slot; 3143 u32 length, tlen = 0, pad = 8; 3144 3145 if (!nfsd4_has_session(&resp->cstate)) 3146 return status; 3147 3148 session = resp->cstate.session; 3149 if (session == NULL || slot->sl_cachethis == 0) 3150 return status; 3151 3152 if (resp->opcnt >= args->opcnt) 3153 pad = 0; /* this is the last operation */ 3154 3155 if (xb->page_len == 0) { 3156 length = (char *)resp->p - (char *)xb->head[0].iov_base + pad; 3157 } else { 3158 if (xb->tail[0].iov_base && xb->tail[0].iov_len > 0) 3159 tlen = (char *)resp->p - (char *)xb->tail[0].iov_base; 3160 3161 length = xb->head[0].iov_len + xb->page_len + tlen + pad; 3162 } 3163 dprintk("%s length %u, xb->page_len %u tlen %u pad %u\n", __func__, 3164 length, xb->page_len, tlen, pad); 3165 3166 if (length <= session->se_fchannel.maxresp_cached) 3167 return status; 3168 else 3169 return nfserr_rep_too_big_to_cache; 3170} 3171 3172void 3173nfsd4_encode_operation(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3174{ 3175 __be32 *statp; 3176 __be32 *p; 3177 3178 RESERVE_SPACE(8); 3179 WRITE32(op->opnum); 3180 statp = p++; /* to be backfilled at the end */ 3181 ADJUST_ARGS(); 3182 3183 if (op->opnum == OP_ILLEGAL) 3184 goto status; 3185 BUG_ON(op->opnum < 0 || op->opnum >= ARRAY_SIZE(nfsd4_enc_ops) || 3186 !nfsd4_enc_ops[op->opnum]); 3187 op->status = nfsd4_enc_ops[op->opnum](resp, op->status, &op->u); 3188 /* nfsd4_check_drc_limit guarantees enough room for error status */ 3189 if (!op->status && nfsd4_check_drc_limit(resp)) 3190 op->status = nfserr_rep_too_big_to_cache; 3191status: 3192 /* 3193 * Note: We write the status directly, instead of using WRITE32(), 3194 * since it is already in network byte order. 3195 */ 3196 *statp = op->status; 3197} 3198 3199/* 3200 * Encode the reply stored in the stateowner reply cache 3201 * 3202 * XDR note: do not encode rp->rp_buflen: the buffer contains the 3203 * previously sent already encoded operation. 3204 * 3205 * called with nfs4_lock_state() held 3206 */ 3207void 3208nfsd4_encode_replay(struct nfsd4_compoundres *resp, struct nfsd4_op *op) 3209{ 3210 __be32 *p; 3211 struct nfs4_replay *rp = op->replay; 3212 3213 BUG_ON(!rp); 3214 3215 RESERVE_SPACE(8); 3216 WRITE32(op->opnum); 3217 *p++ = rp->rp_status; /* already xdr'ed */ 3218 ADJUST_ARGS(); 3219 3220 RESERVE_SPACE(rp->rp_buflen); 3221 WRITEMEM(rp->rp_buf, rp->rp_buflen); 3222 ADJUST_ARGS(); 3223} 3224 3225int 3226nfs4svc_encode_voidres(struct svc_rqst *rqstp, __be32 *p, void *dummy) 3227{ 3228 return xdr_ressize_check(rqstp, p); 3229} 3230 3231void nfsd4_release_compoundargs(struct nfsd4_compoundargs *args) 3232{ 3233 if (args->ops != args->iops) { 3234 kfree(args->ops); 3235 args->ops = args->iops; 3236 } 3237 kfree(args->tmpp); 3238 args->tmpp = NULL; 3239 while (args->to_free) { 3240 struct tmpbuf *tb = args->to_free; 3241 args->to_free = tb->next; 3242 tb->release(tb->buf); 3243 kfree(tb); 3244 } 3245} 3246 3247int 3248nfs4svc_decode_compoundargs(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundargs *args) 3249{ 3250 __be32 status; 3251 3252 args->p = p; 3253 args->end = rqstp->rq_arg.head[0].iov_base + rqstp->rq_arg.head[0].iov_len; 3254 args->pagelist = rqstp->rq_arg.pages; 3255 args->pagelen = rqstp->rq_arg.page_len; 3256 args->tmpp = NULL; 3257 args->to_free = NULL; 3258 args->ops = args->iops; 3259 args->rqstp = rqstp; 3260 3261 status = nfsd4_decode_compound(args); 3262 if (status) { 3263 nfsd4_release_compoundargs(args); 3264 } 3265 return !status; 3266} 3267 3268int 3269nfs4svc_encode_compoundres(struct svc_rqst *rqstp, __be32 *p, struct nfsd4_compoundres *resp) 3270{ 3271 /* 3272 * All that remains is to write the tag and operation count... 3273 */ 3274 struct nfsd4_compound_state *cs = &resp->cstate; 3275 struct kvec *iov; 3276 p = resp->tagp; 3277 *p++ = htonl(resp->taglen); 3278 memcpy(p, resp->tag, resp->taglen); 3279 p += XDR_QUADLEN(resp->taglen); 3280 *p++ = htonl(resp->opcnt); 3281 3282 if (rqstp->rq_res.page_len) 3283 iov = &rqstp->rq_res.tail[0]; 3284 else 3285 iov = &rqstp->rq_res.head[0]; 3286 iov->iov_len = ((char*)resp->p) - (char*)iov->iov_base; 3287 BUG_ON(iov->iov_len > PAGE_SIZE); 3288 if (nfsd4_has_session(cs)) { 3289 if (cs->status != nfserr_replay_cache) { 3290 nfsd4_store_cache_entry(resp); 3291 dprintk("%s: SET SLOT STATE TO AVAILABLE\n", __func__); 3292 cs->slot->sl_inuse = false; 3293 } 3294 /* Renew the clientid on success and on replay */ 3295 release_session_client(cs->session); 3296 nfsd4_put_session(cs->session); 3297 } 3298 return 1; 3299} 3300 3301/* 3302 * Local variables: 3303 * c-basic-offset: 8 3304 * End: 3305 */ 3306