1/* 2 * Server-side procedures 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#include <linux/file.h> 36#include <linux/slab.h> 37 38#include "cache.h" 39#include "xdr4.h" 40#include "vfs.h" 41 42#define NFSDDBG_FACILITY NFSDDBG_PROC 43 44static u32 nfsd_attrmask[] = { 45 NFSD_WRITEABLE_ATTRS_WORD0, 46 NFSD_WRITEABLE_ATTRS_WORD1, 47 NFSD_WRITEABLE_ATTRS_WORD2 48}; 49 50static u32 nfsd41_ex_attrmask[] = { 51 NFSD_SUPPATTR_EXCLCREAT_WORD0, 52 NFSD_SUPPATTR_EXCLCREAT_WORD1, 53 NFSD_SUPPATTR_EXCLCREAT_WORD2 54}; 55 56static __be32 57check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 58 u32 *bmval, u32 *writable) 59{ 60 struct dentry *dentry = cstate->current_fh.fh_dentry; 61 62 /* 63 * Check about attributes are supported by the NFSv4 server or not. 64 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. 65 */ 66 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || 67 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || 68 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) 69 return nfserr_attrnotsupp; 70 71 /* 72 * Check FATTR4_WORD0_ACL can be supported 73 * in current environment or not. 74 */ 75 if (bmval[0] & FATTR4_WORD0_ACL) { 76 if (!IS_POSIXACL(dentry->d_inode)) 77 return nfserr_attrnotsupp; 78 } 79 80 /* 81 * According to spec, read-only attributes return ERR_INVAL. 82 */ 83 if (writable) { 84 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || 85 (bmval[2] & ~writable[2])) 86 return nfserr_inval; 87 } 88 89 return nfs_ok; 90} 91 92static __be32 93nfsd4_check_open_attributes(struct svc_rqst *rqstp, 94 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 95{ 96 __be32 status = nfs_ok; 97 98 if (open->op_create == NFS4_OPEN_CREATE) { 99 if (open->op_createmode == NFS4_CREATE_UNCHECKED 100 || open->op_createmode == NFS4_CREATE_GUARDED) 101 status = check_attr_support(rqstp, cstate, 102 open->op_bmval, nfsd_attrmask); 103 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 104 status = check_attr_support(rqstp, cstate, 105 open->op_bmval, nfsd41_ex_attrmask); 106 } 107 108 return status; 109} 110 111static int 112is_create_with_attrs(struct nfsd4_open *open) 113{ 114 return open->op_create == NFS4_OPEN_CREATE 115 && (open->op_createmode == NFS4_CREATE_UNCHECKED 116 || open->op_createmode == NFS4_CREATE_GUARDED 117 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 118} 119 120/* 121 * if error occurs when setting the acl, just clear the acl bit 122 * in the returned attr bitmap. 123 */ 124static void 125do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 126 struct nfs4_acl *acl, u32 *bmval) 127{ 128 __be32 status; 129 130 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 131 if (status) 132 /* 133 * We should probably fail the whole open at this point, 134 * but we've already created the file, so it's too late; 135 * So this seems the least of evils: 136 */ 137 bmval[0] &= ~FATTR4_WORD0_ACL; 138} 139 140static inline void 141fh_dup2(struct svc_fh *dst, struct svc_fh *src) 142{ 143 fh_put(dst); 144 dget(src->fh_dentry); 145 if (src->fh_export) 146 cache_get(&src->fh_export->h); 147 *dst = *src; 148} 149 150static __be32 151do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 152{ 153 __be32 status; 154 155 if (open->op_truncate && 156 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 157 return nfserr_inval; 158 159 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 160 accmode |= NFSD_MAY_READ; 161 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 162 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 163 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 164 accmode |= NFSD_MAY_WRITE; 165 166 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 167 168 return status; 169} 170 171static __be32 172do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 173{ 174 struct svc_fh resfh; 175 __be32 status; 176 int created = 0; 177 178 fh_init(&resfh, NFS4_FHSIZE); 179 open->op_truncate = 0; 180 181 if (open->op_create) { 182 183 /* 184 * Note: create modes (UNCHECKED,GUARDED...) are the same 185 * in NFSv4 as in v3. 186 */ 187 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data, 188 open->op_fname.len, &open->op_iattr, 189 &resfh, open->op_createmode, 190 (u32 *)open->op_verf.data, 191 &open->op_truncate, &created); 192 193 /* 194 * Following rfc 3530 14.2.16, use the returned bitmask 195 * to indicate which attributes we used to store the 196 * verifier: 197 */ 198 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) 199 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | 200 FATTR4_WORD1_TIME_MODIFY); 201 } else { 202 status = nfsd_lookup(rqstp, current_fh, 203 open->op_fname.data, open->op_fname.len, &resfh); 204 fh_unlock(current_fh); 205 } 206 if (status) 207 goto out; 208 209 if (is_create_with_attrs(open) && open->op_acl != NULL) 210 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval); 211 212 set_change_info(&open->op_cinfo, current_fh); 213 fh_dup2(current_fh, &resfh); 214 215 /* set reply cache */ 216 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, 217 &resfh.fh_handle); 218 if (!created) 219 status = do_open_permission(rqstp, current_fh, open, 220 NFSD_MAY_NOP); 221 222out: 223 fh_put(&resfh); 224 return status; 225} 226 227static __be32 228do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 229{ 230 __be32 status; 231 232 /* Only reclaims from previously confirmed clients are valid */ 233 if ((status = nfs4_check_open_reclaim(&open->op_clientid))) 234 return status; 235 236 /* We don't know the target directory, and therefore can not 237 * set the change info 238 */ 239 240 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 241 242 /* set replay cache */ 243 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, 244 ¤t_fh->fh_handle); 245 246 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 247 (open->op_iattr.ia_size == 0); 248 249 status = do_open_permission(rqstp, current_fh, open, 250 NFSD_MAY_OWNER_OVERRIDE); 251 252 return status; 253} 254 255static void 256copy_clientid(clientid_t *clid, struct nfsd4_session *session) 257{ 258 struct nfsd4_sessionid *sid = 259 (struct nfsd4_sessionid *)session->se_sessionid.data; 260 261 clid->cl_boot = sid->clientid.cl_boot; 262 clid->cl_id = sid->clientid.cl_id; 263} 264 265static __be32 266nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 267 struct nfsd4_open *open) 268{ 269 __be32 status; 270 struct nfsd4_compoundres *resp; 271 272 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n", 273 (int)open->op_fname.len, open->op_fname.data, 274 open->op_stateowner); 275 276 /* This check required by spec. */ 277 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 278 return nfserr_inval; 279 280 if (nfsd4_has_session(cstate)) 281 copy_clientid(&open->op_clientid, cstate->session); 282 283 nfs4_lock_state(); 284 285 /* check seqid for replay. set nfs4_owner */ 286 resp = rqstp->rq_resp; 287 status = nfsd4_process_open1(&resp->cstate, open); 288 if (status == nfserr_replay_me) { 289 struct nfs4_replay *rp = &open->op_stateowner->so_replay; 290 fh_put(&cstate->current_fh); 291 fh_copy_shallow(&cstate->current_fh.fh_handle, 292 &rp->rp_openfh); 293 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 294 if (status) 295 dprintk("nfsd4_open: replay failed" 296 " restoring previous filehandle\n"); 297 else 298 status = nfserr_replay_me; 299 } 300 if (status) 301 goto out; 302 303 status = nfsd4_check_open_attributes(rqstp, cstate, open); 304 if (status) 305 goto out; 306 307 /* Openowner is now set, so sequence id will get bumped. Now we need 308 * these checks before we do any creates: */ 309 status = nfserr_grace; 310 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 311 goto out; 312 status = nfserr_no_grace; 313 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 314 goto out; 315 316 switch (open->op_claim_type) { 317 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 318 case NFS4_OPEN_CLAIM_NULL: 319 /* 320 * (1) set CURRENT_FH to the file being opened, 321 * creating it if necessary, (2) set open->op_cinfo, 322 * (3) set open->op_truncate if the file is to be 323 * truncated after opening, (4) do permission checking. 324 */ 325 status = do_open_lookup(rqstp, &cstate->current_fh, 326 open); 327 if (status) 328 goto out; 329 break; 330 case NFS4_OPEN_CLAIM_PREVIOUS: 331 open->op_stateowner->so_confirmed = 1; 332 /* 333 * The CURRENT_FH is already set to the file being 334 * opened. (1) set open->op_cinfo, (2) set 335 * open->op_truncate if the file is to be truncated 336 * after opening, (3) do permission checking. 337 */ 338 status = do_open_fhandle(rqstp, &cstate->current_fh, 339 open); 340 if (status) 341 goto out; 342 break; 343 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 344 open->op_stateowner->so_confirmed = 1; 345 dprintk("NFSD: unsupported OPEN claim type %d\n", 346 open->op_claim_type); 347 status = nfserr_notsupp; 348 goto out; 349 default: 350 dprintk("NFSD: Invalid OPEN claim type %d\n", 351 open->op_claim_type); 352 status = nfserr_inval; 353 goto out; 354 } 355 /* 356 * nfsd4_process_open2() does the actual opening of the file. If 357 * successful, it (1) truncates the file if open->op_truncate was 358 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 359 */ 360 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open); 361out: 362 if (open->op_stateowner) { 363 nfs4_get_stateowner(open->op_stateowner); 364 cstate->replay_owner = open->op_stateowner; 365 } 366 nfs4_unlock_state(); 367 return status; 368} 369 370/* 371 * filehandle-manipulating ops. 372 */ 373static __be32 374nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 375 struct svc_fh **getfh) 376{ 377 if (!cstate->current_fh.fh_dentry) 378 return nfserr_nofilehandle; 379 380 *getfh = &cstate->current_fh; 381 return nfs_ok; 382} 383 384static __be32 385nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 386 struct nfsd4_putfh *putfh) 387{ 388 fh_put(&cstate->current_fh); 389 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 390 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 391 putfh->pf_fhlen); 392 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 393} 394 395static __be32 396nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 397 void *arg) 398{ 399 __be32 status; 400 401 fh_put(&cstate->current_fh); 402 status = exp_pseudoroot(rqstp, &cstate->current_fh); 403 return status; 404} 405 406static __be32 407nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 408 void *arg) 409{ 410 if (!cstate->save_fh.fh_dentry) 411 return nfserr_restorefh; 412 413 fh_dup2(&cstate->current_fh, &cstate->save_fh); 414 return nfs_ok; 415} 416 417static __be32 418nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 419 void *arg) 420{ 421 if (!cstate->current_fh.fh_dentry) 422 return nfserr_nofilehandle; 423 424 fh_dup2(&cstate->save_fh, &cstate->current_fh); 425 return nfs_ok; 426} 427 428/* 429 * misc nfsv4 ops 430 */ 431static __be32 432nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 433 struct nfsd4_access *access) 434{ 435 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 436 return nfserr_inval; 437 438 access->ac_resp_access = access->ac_req_access; 439 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 440 &access->ac_supported); 441} 442 443static __be32 444nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 445 struct nfsd4_commit *commit) 446{ 447 __be32 status; 448 449 u32 *p = (u32 *)commit->co_verf.data; 450 *p++ = nfssvc_boot.tv_sec; 451 *p++ = nfssvc_boot.tv_usec; 452 453 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 454 commit->co_count); 455 if (status == nfserr_symlink) 456 status = nfserr_inval; 457 return status; 458} 459 460static __be32 461nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 462 struct nfsd4_create *create) 463{ 464 struct svc_fh resfh; 465 __be32 status; 466 dev_t rdev; 467 468 fh_init(&resfh, NFS4_FHSIZE); 469 470 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 471 NFSD_MAY_CREATE); 472 if (status == nfserr_symlink) 473 status = nfserr_notdir; 474 if (status) 475 return status; 476 477 status = check_attr_support(rqstp, cstate, create->cr_bmval, 478 nfsd_attrmask); 479 if (status) 480 return status; 481 482 switch (create->cr_type) { 483 case NF4LNK: 484 /* ugh! we have to null-terminate the linktext, or 485 * vfs_symlink() will choke. it is always safe to 486 * null-terminate by brute force, since at worst we 487 * will overwrite the first byte of the create namelen 488 * in the XDR buffer, which has already been extracted 489 * during XDR decode. 490 */ 491 create->cr_linkname[create->cr_linklen] = 0; 492 493 status = nfsd_symlink(rqstp, &cstate->current_fh, 494 create->cr_name, create->cr_namelen, 495 create->cr_linkname, create->cr_linklen, 496 &resfh, &create->cr_iattr); 497 break; 498 499 case NF4BLK: 500 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 501 if (MAJOR(rdev) != create->cr_specdata1 || 502 MINOR(rdev) != create->cr_specdata2) 503 return nfserr_inval; 504 status = nfsd_create(rqstp, &cstate->current_fh, 505 create->cr_name, create->cr_namelen, 506 &create->cr_iattr, S_IFBLK, rdev, &resfh); 507 break; 508 509 case NF4CHR: 510 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 511 if (MAJOR(rdev) != create->cr_specdata1 || 512 MINOR(rdev) != create->cr_specdata2) 513 return nfserr_inval; 514 status = nfsd_create(rqstp, &cstate->current_fh, 515 create->cr_name, create->cr_namelen, 516 &create->cr_iattr,S_IFCHR, rdev, &resfh); 517 break; 518 519 case NF4SOCK: 520 status = nfsd_create(rqstp, &cstate->current_fh, 521 create->cr_name, create->cr_namelen, 522 &create->cr_iattr, S_IFSOCK, 0, &resfh); 523 break; 524 525 case NF4FIFO: 526 status = nfsd_create(rqstp, &cstate->current_fh, 527 create->cr_name, create->cr_namelen, 528 &create->cr_iattr, S_IFIFO, 0, &resfh); 529 break; 530 531 case NF4DIR: 532 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 533 status = nfsd_create(rqstp, &cstate->current_fh, 534 create->cr_name, create->cr_namelen, 535 &create->cr_iattr, S_IFDIR, 0, &resfh); 536 break; 537 538 default: 539 status = nfserr_badtype; 540 } 541 542 if (status) 543 goto out; 544 545 if (create->cr_acl != NULL) 546 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 547 create->cr_bmval); 548 549 fh_unlock(&cstate->current_fh); 550 set_change_info(&create->cr_cinfo, &cstate->current_fh); 551 fh_dup2(&cstate->current_fh, &resfh); 552out: 553 fh_put(&resfh); 554 return status; 555} 556 557static __be32 558nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 559 struct nfsd4_getattr *getattr) 560{ 561 __be32 status; 562 563 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 564 if (status) 565 return status; 566 567 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 568 return nfserr_inval; 569 570 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 571 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 572 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 573 574 getattr->ga_fhp = &cstate->current_fh; 575 return nfs_ok; 576} 577 578static __be32 579nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 580 struct nfsd4_link *link) 581{ 582 __be32 status = nfserr_nofilehandle; 583 584 if (!cstate->save_fh.fh_dentry) 585 return status; 586 status = nfsd_link(rqstp, &cstate->current_fh, 587 link->li_name, link->li_namelen, &cstate->save_fh); 588 if (!status) 589 set_change_info(&link->li_cinfo, &cstate->current_fh); 590 return status; 591} 592 593static __be32 594nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 595 void *arg) 596{ 597 struct svc_fh tmp_fh; 598 __be32 ret; 599 600 fh_init(&tmp_fh, NFS4_FHSIZE); 601 ret = exp_pseudoroot(rqstp, &tmp_fh); 602 if (ret) 603 return ret; 604 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) { 605 fh_put(&tmp_fh); 606 return nfserr_noent; 607 } 608 fh_put(&tmp_fh); 609 return nfsd_lookup(rqstp, &cstate->current_fh, 610 "..", 2, &cstate->current_fh); 611} 612 613static __be32 614nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 615 struct nfsd4_lookup *lookup) 616{ 617 return nfsd_lookup(rqstp, &cstate->current_fh, 618 lookup->lo_name, lookup->lo_len, 619 &cstate->current_fh); 620} 621 622static __be32 623nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 624 struct nfsd4_read *read) 625{ 626 __be32 status; 627 628 /* no need to check permission - this will be done in nfsd_read() */ 629 630 read->rd_filp = NULL; 631 if (read->rd_offset >= OFFSET_MAX) 632 return nfserr_inval; 633 634 nfs4_lock_state(); 635 /* check stateid */ 636 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid, 637 RD_STATE, &read->rd_filp))) { 638 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 639 goto out; 640 } 641 if (read->rd_filp) 642 get_file(read->rd_filp); 643 status = nfs_ok; 644out: 645 nfs4_unlock_state(); 646 read->rd_rqstp = rqstp; 647 read->rd_fhp = &cstate->current_fh; 648 return status; 649} 650 651static __be32 652nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 653 struct nfsd4_readdir *readdir) 654{ 655 u64 cookie = readdir->rd_cookie; 656 static const nfs4_verifier zeroverf; 657 658 /* no need to check permission - this will be done in nfsd_readdir() */ 659 660 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 661 return nfserr_inval; 662 663 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 664 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 665 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 666 667 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) || 668 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 669 return nfserr_bad_cookie; 670 671 readdir->rd_rqstp = rqstp; 672 readdir->rd_fhp = &cstate->current_fh; 673 return nfs_ok; 674} 675 676static __be32 677nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 678 struct nfsd4_readlink *readlink) 679{ 680 readlink->rl_rqstp = rqstp; 681 readlink->rl_fhp = &cstate->current_fh; 682 return nfs_ok; 683} 684 685static __be32 686nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 687 struct nfsd4_remove *remove) 688{ 689 __be32 status; 690 691 if (locks_in_grace()) 692 return nfserr_grace; 693 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 694 remove->rm_name, remove->rm_namelen); 695 if (status == nfserr_symlink) 696 return nfserr_notdir; 697 if (!status) { 698 fh_unlock(&cstate->current_fh); 699 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 700 } 701 return status; 702} 703 704static __be32 705nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 706 struct nfsd4_rename *rename) 707{ 708 __be32 status = nfserr_nofilehandle; 709 710 if (!cstate->save_fh.fh_dentry) 711 return status; 712 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags 713 & NFSEXP_NOSUBTREECHECK)) 714 return nfserr_grace; 715 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 716 rename->rn_snamelen, &cstate->current_fh, 717 rename->rn_tname, rename->rn_tnamelen); 718 719 /* the underlying filesystem returns different error's than required 720 * by NFSv4. both save_fh and current_fh have been verified.. */ 721 if (status == nfserr_isdir) 722 status = nfserr_exist; 723 else if ((status == nfserr_notdir) && 724 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) && 725 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode))) 726 status = nfserr_exist; 727 else if (status == nfserr_symlink) 728 status = nfserr_notdir; 729 730 if (!status) { 731 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 732 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 733 } 734 return status; 735} 736 737static __be32 738nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 739 struct nfsd4_secinfo *secinfo) 740{ 741 struct svc_fh resfh; 742 struct svc_export *exp; 743 struct dentry *dentry; 744 __be32 err; 745 746 fh_init(&resfh, NFS4_FHSIZE); 747 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 748 secinfo->si_name, secinfo->si_namelen, 749 &exp, &dentry); 750 if (err) 751 return err; 752 if (dentry->d_inode == NULL) { 753 exp_put(exp); 754 err = nfserr_noent; 755 } else 756 secinfo->si_exp = exp; 757 dput(dentry); 758 return err; 759} 760 761static __be32 762nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 763 struct nfsd4_setattr *setattr) 764{ 765 __be32 status = nfs_ok; 766 767 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 768 nfs4_lock_state(); 769 status = nfs4_preprocess_stateid_op(cstate, 770 &setattr->sa_stateid, WR_STATE, NULL); 771 nfs4_unlock_state(); 772 if (status) { 773 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 774 return status; 775 } 776 } 777 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt); 778 if (status) 779 return status; 780 status = nfs_ok; 781 782 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 783 nfsd_attrmask); 784 if (status) 785 goto out; 786 787 if (setattr->sa_acl != NULL) 788 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 789 setattr->sa_acl); 790 if (status) 791 goto out; 792 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 793 0, (time_t)0); 794out: 795 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt); 796 return status; 797} 798 799static __be32 800nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 801 struct nfsd4_write *write) 802{ 803 stateid_t *stateid = &write->wr_stateid; 804 struct file *filp = NULL; 805 u32 *p; 806 __be32 status = nfs_ok; 807 unsigned long cnt; 808 809 /* no need to check permission - this will be done in nfsd_write() */ 810 811 if (write->wr_offset >= OFFSET_MAX) 812 return nfserr_inval; 813 814 nfs4_lock_state(); 815 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp); 816 if (filp) 817 get_file(filp); 818 nfs4_unlock_state(); 819 820 if (status) { 821 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 822 return status; 823 } 824 825 cnt = write->wr_buflen; 826 write->wr_how_written = write->wr_stable_how; 827 p = (u32 *)write->wr_verifier.data; 828 *p++ = nfssvc_boot.tv_sec; 829 *p++ = nfssvc_boot.tv_usec; 830 831 status = nfsd_write(rqstp, &cstate->current_fh, filp, 832 write->wr_offset, rqstp->rq_vec, write->wr_vlen, 833 &cnt, &write->wr_how_written); 834 if (filp) 835 fput(filp); 836 837 write->wr_bytes_written = cnt; 838 839 if (status == nfserr_symlink) 840 status = nfserr_inval; 841 return status; 842} 843 844/* This routine never returns NFS_OK! If there are no other errors, it 845 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 846 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 847 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 848 */ 849static __be32 850_nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 851 struct nfsd4_verify *verify) 852{ 853 __be32 *buf, *p; 854 int count; 855 __be32 status; 856 857 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 858 if (status) 859 return status; 860 861 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 862 if (status) 863 return status; 864 865 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 866 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 867 return nfserr_inval; 868 if (verify->ve_attrlen & 3) 869 return nfserr_inval; 870 871 /* count in words: 872 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 873 */ 874 count = 4 + (verify->ve_attrlen >> 2); 875 buf = kmalloc(count << 2, GFP_KERNEL); 876 if (!buf) 877 return nfserr_resource; 878 879 status = nfsd4_encode_fattr(&cstate->current_fh, 880 cstate->current_fh.fh_export, 881 cstate->current_fh.fh_dentry, buf, 882 &count, verify->ve_bmval, 883 rqstp, 0); 884 885 /* this means that nfsd4_encode_fattr() ran out of space */ 886 if (status == nfserr_resource && count == 0) 887 status = nfserr_not_same; 888 if (status) 889 goto out_kfree; 890 891 /* skip bitmap */ 892 p = buf + 1 + ntohl(buf[0]); 893 status = nfserr_not_same; 894 if (ntohl(*p++) != verify->ve_attrlen) 895 goto out_kfree; 896 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 897 status = nfserr_same; 898 899out_kfree: 900 kfree(buf); 901 return status; 902} 903 904static __be32 905nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 906 struct nfsd4_verify *verify) 907{ 908 __be32 status; 909 910 status = _nfsd4_verify(rqstp, cstate, verify); 911 return status == nfserr_not_same ? nfs_ok : status; 912} 913 914static __be32 915nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 916 struct nfsd4_verify *verify) 917{ 918 __be32 status; 919 920 status = _nfsd4_verify(rqstp, cstate, verify); 921 return status == nfserr_same ? nfs_ok : status; 922} 923 924/* 925 * NULL call. 926 */ 927static __be32 928nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 929{ 930 return nfs_ok; 931} 932 933static inline void nfsd4_increment_op_stats(u32 opnum) 934{ 935 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 936 nfsdstats.nfs4_opcount[opnum]++; 937} 938 939typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 940 void *); 941enum nfsd4_op_flags { 942 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 943 ALLOWED_ON_ABSENT_FS = 2 << 0, /* ops processed on absent fs */ 944 ALLOWED_AS_FIRST_OP = 3 << 0, /* ops reqired first in compound */ 945}; 946 947struct nfsd4_operation { 948 nfsd4op_func op_func; 949 u32 op_flags; 950 char *op_name; 951}; 952 953static struct nfsd4_operation nfsd4_ops[]; 954 955static const char *nfsd4_op_name(unsigned opnum); 956 957/* 958 * Enforce NFSv4.1 COMPOUND ordering rules: 959 * 960 * Also note, enforced elsewhere: 961 * - SEQUENCE other than as first op results in 962 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 963 * - BIND_CONN_TO_SESSION must be the only op in its compound 964 * (Will be enforced in nfsd4_bind_conn_to_session().) 965 * - DESTROY_SESSION must be the final operation in a compound, if 966 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 967 * (Enforced in nfsd4_destroy_session().) 968 */ 969static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 970{ 971 struct nfsd4_op *op = &args->ops[0]; 972 973 /* These ordering requirements don't apply to NFSv4.0: */ 974 if (args->minorversion == 0) 975 return nfs_ok; 976 /* This is weird, but OK, not our problem: */ 977 if (args->opcnt == 0) 978 return nfs_ok; 979 if (op->status == nfserr_op_illegal) 980 return nfs_ok; 981 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 982 return nfserr_op_not_in_session; 983 if (op->opnum == OP_SEQUENCE) 984 return nfs_ok; 985 if (args->opcnt != 1) 986 return nfserr_not_only_op; 987 return nfs_ok; 988} 989 990/* 991 * COMPOUND call. 992 */ 993static __be32 994nfsd4_proc_compound(struct svc_rqst *rqstp, 995 struct nfsd4_compoundargs *args, 996 struct nfsd4_compoundres *resp) 997{ 998 struct nfsd4_op *op; 999 struct nfsd4_operation *opdesc; 1000 struct nfsd4_compound_state *cstate = &resp->cstate; 1001 int slack_bytes; 1002 __be32 status; 1003 1004 resp->xbuf = &rqstp->rq_res; 1005 resp->p = rqstp->rq_res.head[0].iov_base + 1006 rqstp->rq_res.head[0].iov_len; 1007 resp->tagp = resp->p; 1008 /* reserve space for: taglen, tag, and opcnt */ 1009 resp->p += 2 + XDR_QUADLEN(args->taglen); 1010 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; 1011 resp->taglen = args->taglen; 1012 resp->tag = args->tag; 1013 resp->opcnt = 0; 1014 resp->rqstp = rqstp; 1015 resp->cstate.minorversion = args->minorversion; 1016 resp->cstate.replay_owner = NULL; 1017 resp->cstate.session = NULL; 1018 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); 1019 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); 1020 /* Use the deferral mechanism only for NFSv4.0 compounds */ 1021 rqstp->rq_usedeferral = (args->minorversion == 0); 1022 1023 /* 1024 * According to RFC3010, this takes precedence over all other errors. 1025 */ 1026 status = nfserr_minor_vers_mismatch; 1027 if (args->minorversion > nfsd_supported_minorversion) 1028 goto out; 1029 1030 status = nfs41_check_op_ordering(args); 1031 if (status) { 1032 op = &args->ops[0]; 1033 op->status = status; 1034 goto encode_op; 1035 } 1036 1037 while (!status && resp->opcnt < args->opcnt) { 1038 op = &args->ops[resp->opcnt++]; 1039 1040 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1041 resp->opcnt, args->opcnt, op->opnum, 1042 nfsd4_op_name(op->opnum)); 1043 /* 1044 * The XDR decode routines may have pre-set op->status; 1045 * for example, if there is a miscellaneous XDR error 1046 * it will be set to nfserr_bad_xdr. 1047 */ 1048 if (op->status) 1049 goto encode_op; 1050 1051 /* We must be able to encode a successful response to 1052 * this operation, with enough room left over to encode a 1053 * failed response to the next operation. If we don't 1054 * have enough room, fail with ERR_RESOURCE. 1055 */ 1056 slack_bytes = (char *)resp->end - (char *)resp->p; 1057 if (slack_bytes < COMPOUND_SLACK_SPACE 1058 + COMPOUND_ERR_SLACK_SPACE) { 1059 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); 1060 op->status = nfserr_resource; 1061 goto encode_op; 1062 } 1063 1064 opdesc = &nfsd4_ops[op->opnum]; 1065 1066 if (!cstate->current_fh.fh_dentry) { 1067 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1068 op->status = nfserr_nofilehandle; 1069 goto encode_op; 1070 } 1071 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && 1072 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1073 op->status = nfserr_moved; 1074 goto encode_op; 1075 } 1076 1077 if (opdesc->op_func) 1078 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1079 else 1080 BUG_ON(op->status == nfs_ok); 1081 1082encode_op: 1083 /* Only from SEQUENCE */ 1084 if (resp->cstate.status == nfserr_replay_cache) { 1085 dprintk("%s NFS4.1 replay from cache\n", __func__); 1086 status = op->status; 1087 goto out; 1088 } 1089 if (op->status == nfserr_replay_me) { 1090 op->replay = &cstate->replay_owner->so_replay; 1091 nfsd4_encode_replay(resp, op); 1092 status = op->status = op->replay->rp_status; 1093 } else { 1094 nfsd4_encode_operation(resp, op); 1095 status = op->status; 1096 } 1097 1098 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1099 args->ops, args->opcnt, resp->opcnt, op->opnum, 1100 be32_to_cpu(status)); 1101 1102 if (cstate->replay_owner) { 1103 nfs4_put_stateowner(cstate->replay_owner); 1104 cstate->replay_owner = NULL; 1105 } 1106 if (op->opnum == OP_READ && op->u.read.rd_filp) 1107 fput(op->u.read.rd_filp); 1108 1109 nfsd4_increment_op_stats(op->opnum); 1110 } 1111 if (!rqstp->rq_usedeferral && status == nfserr_dropit) { 1112 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__); 1113 status = nfserr_jukebox; 1114 } 1115 1116 resp->cstate.status = status; 1117 fh_put(&resp->cstate.current_fh); 1118 fh_put(&resp->cstate.save_fh); 1119 BUG_ON(resp->cstate.replay_owner); 1120out: 1121 nfsd4_release_compoundargs(args); 1122 /* Reset deferral mechanism for RPC deferrals */ 1123 rqstp->rq_usedeferral = 1; 1124 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1125 return status; 1126} 1127 1128static struct nfsd4_operation nfsd4_ops[] = { 1129 [OP_ACCESS] = { 1130 .op_func = (nfsd4op_func)nfsd4_access, 1131 .op_name = "OP_ACCESS", 1132 }, 1133 [OP_CLOSE] = { 1134 .op_func = (nfsd4op_func)nfsd4_close, 1135 .op_name = "OP_CLOSE", 1136 }, 1137 [OP_COMMIT] = { 1138 .op_func = (nfsd4op_func)nfsd4_commit, 1139 .op_name = "OP_COMMIT", 1140 }, 1141 [OP_CREATE] = { 1142 .op_func = (nfsd4op_func)nfsd4_create, 1143 .op_name = "OP_CREATE", 1144 }, 1145 [OP_DELEGRETURN] = { 1146 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1147 .op_name = "OP_DELEGRETURN", 1148 }, 1149 [OP_GETATTR] = { 1150 .op_func = (nfsd4op_func)nfsd4_getattr, 1151 .op_flags = ALLOWED_ON_ABSENT_FS, 1152 .op_name = "OP_GETATTR", 1153 }, 1154 [OP_GETFH] = { 1155 .op_func = (nfsd4op_func)nfsd4_getfh, 1156 .op_name = "OP_GETFH", 1157 }, 1158 [OP_LINK] = { 1159 .op_func = (nfsd4op_func)nfsd4_link, 1160 .op_name = "OP_LINK", 1161 }, 1162 [OP_LOCK] = { 1163 .op_func = (nfsd4op_func)nfsd4_lock, 1164 .op_name = "OP_LOCK", 1165 }, 1166 [OP_LOCKT] = { 1167 .op_func = (nfsd4op_func)nfsd4_lockt, 1168 .op_name = "OP_LOCKT", 1169 }, 1170 [OP_LOCKU] = { 1171 .op_func = (nfsd4op_func)nfsd4_locku, 1172 .op_name = "OP_LOCKU", 1173 }, 1174 [OP_LOOKUP] = { 1175 .op_func = (nfsd4op_func)nfsd4_lookup, 1176 .op_name = "OP_LOOKUP", 1177 }, 1178 [OP_LOOKUPP] = { 1179 .op_func = (nfsd4op_func)nfsd4_lookupp, 1180 .op_name = "OP_LOOKUPP", 1181 }, 1182 [OP_NVERIFY] = { 1183 .op_func = (nfsd4op_func)nfsd4_nverify, 1184 .op_name = "OP_NVERIFY", 1185 }, 1186 [OP_OPEN] = { 1187 .op_func = (nfsd4op_func)nfsd4_open, 1188 .op_name = "OP_OPEN", 1189 }, 1190 [OP_OPEN_CONFIRM] = { 1191 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1192 .op_name = "OP_OPEN_CONFIRM", 1193 }, 1194 [OP_OPEN_DOWNGRADE] = { 1195 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1196 .op_name = "OP_OPEN_DOWNGRADE", 1197 }, 1198 [OP_PUTFH] = { 1199 .op_func = (nfsd4op_func)nfsd4_putfh, 1200 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1201 .op_name = "OP_PUTFH", 1202 }, 1203 [OP_PUTPUBFH] = { 1204 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1205 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1206 .op_name = "OP_PUTPUBFH", 1207 }, 1208 [OP_PUTROOTFH] = { 1209 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1210 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1211 .op_name = "OP_PUTROOTFH", 1212 }, 1213 [OP_READ] = { 1214 .op_func = (nfsd4op_func)nfsd4_read, 1215 .op_name = "OP_READ", 1216 }, 1217 [OP_READDIR] = { 1218 .op_func = (nfsd4op_func)nfsd4_readdir, 1219 .op_name = "OP_READDIR", 1220 }, 1221 [OP_READLINK] = { 1222 .op_func = (nfsd4op_func)nfsd4_readlink, 1223 .op_name = "OP_READLINK", 1224 }, 1225 [OP_REMOVE] = { 1226 .op_func = (nfsd4op_func)nfsd4_remove, 1227 .op_name = "OP_REMOVE", 1228 }, 1229 [OP_RENAME] = { 1230 .op_name = "OP_RENAME", 1231 .op_func = (nfsd4op_func)nfsd4_rename, 1232 }, 1233 [OP_RENEW] = { 1234 .op_func = (nfsd4op_func)nfsd4_renew, 1235 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1236 .op_name = "OP_RENEW", 1237 }, 1238 [OP_RESTOREFH] = { 1239 .op_func = (nfsd4op_func)nfsd4_restorefh, 1240 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1241 .op_name = "OP_RESTOREFH", 1242 }, 1243 [OP_SAVEFH] = { 1244 .op_func = (nfsd4op_func)nfsd4_savefh, 1245 .op_name = "OP_SAVEFH", 1246 }, 1247 [OP_SECINFO] = { 1248 .op_func = (nfsd4op_func)nfsd4_secinfo, 1249 .op_name = "OP_SECINFO", 1250 }, 1251 [OP_SETATTR] = { 1252 .op_func = (nfsd4op_func)nfsd4_setattr, 1253 .op_name = "OP_SETATTR", 1254 }, 1255 [OP_SETCLIENTID] = { 1256 .op_func = (nfsd4op_func)nfsd4_setclientid, 1257 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1258 .op_name = "OP_SETCLIENTID", 1259 }, 1260 [OP_SETCLIENTID_CONFIRM] = { 1261 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1262 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1263 .op_name = "OP_SETCLIENTID_CONFIRM", 1264 }, 1265 [OP_VERIFY] = { 1266 .op_func = (nfsd4op_func)nfsd4_verify, 1267 .op_name = "OP_VERIFY", 1268 }, 1269 [OP_WRITE] = { 1270 .op_func = (nfsd4op_func)nfsd4_write, 1271 .op_name = "OP_WRITE", 1272 }, 1273 [OP_RELEASE_LOCKOWNER] = { 1274 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1275 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1276 .op_name = "OP_RELEASE_LOCKOWNER", 1277 }, 1278 1279 /* NFSv4.1 operations */ 1280 [OP_EXCHANGE_ID] = { 1281 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1282 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1283 .op_name = "OP_EXCHANGE_ID", 1284 }, 1285 [OP_CREATE_SESSION] = { 1286 .op_func = (nfsd4op_func)nfsd4_create_session, 1287 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1288 .op_name = "OP_CREATE_SESSION", 1289 }, 1290 [OP_DESTROY_SESSION] = { 1291 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1292 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1293 .op_name = "OP_DESTROY_SESSION", 1294 }, 1295 [OP_SEQUENCE] = { 1296 .op_func = (nfsd4op_func)nfsd4_sequence, 1297 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1298 .op_name = "OP_SEQUENCE", 1299 }, 1300 [OP_RECLAIM_COMPLETE] = { 1301 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 1302 .op_flags = ALLOWED_WITHOUT_FH, 1303 .op_name = "OP_RECLAIM_COMPLETE", 1304 }, 1305}; 1306 1307static const char *nfsd4_op_name(unsigned opnum) 1308{ 1309 if (opnum < ARRAY_SIZE(nfsd4_ops)) 1310 return nfsd4_ops[opnum].op_name; 1311 return "unknown_operation"; 1312} 1313 1314#define nfsd4_voidres nfsd4_voidargs 1315struct nfsd4_voidargs { int dummy; }; 1316 1317/* 1318 * TODO: At the present time, the NFSv4 server does not do XID caching 1319 * of requests. Implementing XID caching would not be a serious problem, 1320 * although it would require a mild change in interfaces since one 1321 * doesn't know whether an NFSv4 request is idempotent until after the 1322 * XDR decode. However, XID caching totally confuses pynfs (Peter 1323 * Astrand's regression testsuite for NFSv4 servers), which reuses 1324 * XID's liberally, so I've left it unimplemented until pynfs generates 1325 * better XID's. 1326 */ 1327static struct svc_procedure nfsd_procedures4[2] = { 1328 [NFSPROC4_NULL] = { 1329 .pc_func = (svc_procfunc) nfsd4_proc_null, 1330 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 1331 .pc_argsize = sizeof(struct nfsd4_voidargs), 1332 .pc_ressize = sizeof(struct nfsd4_voidres), 1333 .pc_cachetype = RC_NOCACHE, 1334 .pc_xdrressize = 1, 1335 }, 1336 [NFSPROC4_COMPOUND] = { 1337 .pc_func = (svc_procfunc) nfsd4_proc_compound, 1338 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 1339 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 1340 .pc_argsize = sizeof(struct nfsd4_compoundargs), 1341 .pc_ressize = sizeof(struct nfsd4_compoundres), 1342 .pc_cachetype = RC_NOCACHE, 1343 .pc_xdrressize = NFSD_BUFSIZE/4, 1344 }, 1345}; 1346 1347struct svc_version nfsd_version4 = { 1348 .vs_vers = 4, 1349 .vs_nproc = 2, 1350 .vs_proc = nfsd_procedures4, 1351 .vs_dispatch = nfsd_dispatch, 1352 .vs_xdrsize = NFS4_SVC_XDRSIZE, 1353}; 1354 1355/* 1356 * Local variables: 1357 * c-basic-offset: 8 1358 * End: 1359 */ 1360