1 /* 2 * fs/nfsd/nfs4proc.c 3 * 4 * Server-side procedures for NFSv4. 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <linux/param.h> 39 #include <linux/major.h> 40 #include <linux/slab.h> 41 #include <linux/file.h> 42 43 #include <linux/sunrpc/svc.h> 44 #include <linux/nfsd/nfsd.h> 45 #include <linux/nfsd/cache.h> 46 #include <linux/nfs4.h> 47 #include <linux/nfsd/state.h> 48 #include <linux/nfsd/xdr4.h> 49 #include <linux/nfs4_acl.h> 50 #include <linux/sunrpc/gss_api.h> 51 52 #define NFSDDBG_FACILITY NFSDDBG_PROC 53 54 static u32 nfsd_attrmask[] = { 55 NFSD_WRITEABLE_ATTRS_WORD0, 56 NFSD_WRITEABLE_ATTRS_WORD1, 57 NFSD_WRITEABLE_ATTRS_WORD2 58 }; 59 60 static u32 nfsd41_ex_attrmask[] = { 61 NFSD_SUPPATTR_EXCLCREAT_WORD0, 62 NFSD_SUPPATTR_EXCLCREAT_WORD1, 63 NFSD_SUPPATTR_EXCLCREAT_WORD2 64 }; 65 66 static __be32 67 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 68 u32 *bmval, u32 *writable) 69 { 70 struct dentry *dentry = cstate->current_fh.fh_dentry; 71 struct svc_export *exp = cstate->current_fh.fh_export; 72 73 /* 74 * Check about attributes are supported by the NFSv4 server or not. 75 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. 76 */ 77 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || 78 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || 79 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) 80 return nfserr_attrnotsupp; 81 82 /* 83 * Check FATTR4_WORD0_ACL & FATTR4_WORD0_FS_LOCATIONS can be supported 84 * in current environment or not. 85 */ 86 if (bmval[0] & FATTR4_WORD0_ACL) { 87 if (!IS_POSIXACL(dentry->d_inode)) 88 return nfserr_attrnotsupp; 89 } 90 if (bmval[0] & FATTR4_WORD0_FS_LOCATIONS) { 91 if (exp->ex_fslocs.locations == NULL) 92 return nfserr_attrnotsupp; 93 } 94 95 /* 96 * According to spec, read-only attributes return ERR_INVAL. 97 */ 98 if (writable) { 99 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || 100 (bmval[2] & ~writable[2])) 101 return nfserr_inval; 102 } 103 104 return nfs_ok; 105 } 106 107 static __be32 108 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 109 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 110 { 111 __be32 status = nfs_ok; 112 113 if (open->op_create == NFS4_OPEN_CREATE) { 114 if (open->op_createmode == NFS4_CREATE_UNCHECKED 115 || open->op_createmode == NFS4_CREATE_GUARDED) 116 status = check_attr_support(rqstp, cstate, 117 open->op_bmval, nfsd_attrmask); 118 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 119 status = check_attr_support(rqstp, cstate, 120 open->op_bmval, nfsd41_ex_attrmask); 121 } 122 123 return status; 124 } 125 126 static inline void 127 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 128 { 129 fh_put(dst); 130 dget(src->fh_dentry); 131 if (src->fh_export) 132 cache_get(&src->fh_export->h); 133 *dst = *src; 134 } 135 136 static __be32 137 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 138 { 139 __be32 status; 140 141 if (open->op_truncate && 142 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 143 return nfserr_inval; 144 145 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 146 accmode |= NFSD_MAY_READ; 147 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 148 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 149 if (open->op_share_deny & NFS4_SHARE_DENY_WRITE) 150 accmode |= NFSD_MAY_WRITE; 151 152 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 153 154 return status; 155 } 156 157 static __be32 158 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 159 { 160 struct svc_fh resfh; 161 __be32 status; 162 int created = 0; 163 164 fh_init(&resfh, NFS4_FHSIZE); 165 open->op_truncate = 0; 166 167 if (open->op_create) { 168 /* FIXME: check session persistence and pnfs flags. 169 * The nfsv4.1 spec requires the following semantics: 170 * 171 * Persistent | pNFS | Server REQUIRED | Client Allowed 172 * Reply Cache | server | | 173 * -------------+--------+-----------------+-------------------- 174 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 175 * | | | (SHOULD) 176 * | | and EXCLUSIVE4 | or EXCLUSIVE4 177 * | | | (SHOULD NOT) 178 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 179 * yes | no | GUARDED4 | GUARDED4 180 * yes | yes | GUARDED4 | GUARDED4 181 */ 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 set_change_info(&open->op_cinfo, current_fh); 210 fh_dup2(current_fh, &resfh); 211 212 /* set reply cache */ 213 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, 214 &resfh.fh_handle); 215 if (!created) 216 status = do_open_permission(rqstp, current_fh, open, 217 NFSD_MAY_NOP); 218 219 out: 220 fh_put(&resfh); 221 return status; 222 } 223 224 static __be32 225 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 226 { 227 __be32 status; 228 229 /* Only reclaims from previously confirmed clients are valid */ 230 if ((status = nfs4_check_open_reclaim(&open->op_clientid))) 231 return status; 232 233 /* We don't know the target directory, and therefore can not 234 * set the change info 235 */ 236 237 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 238 239 /* set replay cache */ 240 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, 241 ¤t_fh->fh_handle); 242 243 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 244 (open->op_iattr.ia_size == 0); 245 246 status = do_open_permission(rqstp, current_fh, open, 247 NFSD_MAY_OWNER_OVERRIDE); 248 249 return status; 250 } 251 252 static void 253 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 254 { 255 struct nfsd4_sessionid *sid = 256 (struct nfsd4_sessionid *)session->se_sessionid.data; 257 258 clid->cl_boot = sid->clientid.cl_boot; 259 clid->cl_id = sid->clientid.cl_id; 260 } 261 262 static __be32 263 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 264 struct nfsd4_open *open) 265 { 266 __be32 status; 267 struct nfsd4_compoundres *resp; 268 269 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n", 270 (int)open->op_fname.len, open->op_fname.data, 271 open->op_stateowner); 272 273 /* This check required by spec. */ 274 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 275 return nfserr_inval; 276 277 if (nfsd4_has_session(cstate)) 278 copy_clientid(&open->op_clientid, cstate->session); 279 280 nfs4_lock_state(); 281 282 /* check seqid for replay. set nfs4_owner */ 283 resp = rqstp->rq_resp; 284 status = nfsd4_process_open1(&resp->cstate, open); 285 if (status == nfserr_replay_me) { 286 struct nfs4_replay *rp = &open->op_stateowner->so_replay; 287 fh_put(&cstate->current_fh); 288 fh_copy_shallow(&cstate->current_fh.fh_handle, 289 &rp->rp_openfh); 290 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 291 if (status) 292 dprintk("nfsd4_open: replay failed" 293 " restoring previous filehandle\n"); 294 else 295 status = nfserr_replay_me; 296 } 297 if (status) 298 goto out; 299 300 status = nfsd4_check_open_attributes(rqstp, cstate, open); 301 if (status) 302 goto out; 303 304 /* Openowner is now set, so sequence id will get bumped. Now we need 305 * these checks before we do any creates: */ 306 status = nfserr_grace; 307 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 308 goto out; 309 status = nfserr_no_grace; 310 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 311 goto out; 312 313 switch (open->op_claim_type) { 314 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 315 case NFS4_OPEN_CLAIM_NULL: 316 /* 317 * (1) set CURRENT_FH to the file being opened, 318 * creating it if necessary, (2) set open->op_cinfo, 319 * (3) set open->op_truncate if the file is to be 320 * truncated after opening, (4) do permission checking. 321 */ 322 status = do_open_lookup(rqstp, &cstate->current_fh, 323 open); 324 if (status) 325 goto out; 326 break; 327 case NFS4_OPEN_CLAIM_PREVIOUS: 328 open->op_stateowner->so_confirmed = 1; 329 /* 330 * The CURRENT_FH is already set to the file being 331 * opened. (1) set open->op_cinfo, (2) set 332 * open->op_truncate if the file is to be truncated 333 * after opening, (3) do permission checking. 334 */ 335 status = do_open_fhandle(rqstp, &cstate->current_fh, 336 open); 337 if (status) 338 goto out; 339 break; 340 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 341 open->op_stateowner->so_confirmed = 1; 342 dprintk("NFSD: unsupported OPEN claim type %d\n", 343 open->op_claim_type); 344 status = nfserr_notsupp; 345 goto out; 346 default: 347 dprintk("NFSD: Invalid OPEN claim type %d\n", 348 open->op_claim_type); 349 status = nfserr_inval; 350 goto out; 351 } 352 /* 353 * nfsd4_process_open2() does the actual opening of the file. If 354 * successful, it (1) truncates the file if open->op_truncate was 355 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 356 */ 357 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open); 358 out: 359 if (open->op_stateowner) { 360 nfs4_get_stateowner(open->op_stateowner); 361 cstate->replay_owner = open->op_stateowner; 362 } 363 nfs4_unlock_state(); 364 return status; 365 } 366 367 /* 368 * filehandle-manipulating ops. 369 */ 370 static __be32 371 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 372 struct svc_fh **getfh) 373 { 374 if (!cstate->current_fh.fh_dentry) 375 return nfserr_nofilehandle; 376 377 *getfh = &cstate->current_fh; 378 return nfs_ok; 379 } 380 381 static __be32 382 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 383 struct nfsd4_putfh *putfh) 384 { 385 fh_put(&cstate->current_fh); 386 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 387 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 388 putfh->pf_fhlen); 389 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 390 } 391 392 static __be32 393 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 394 void *arg) 395 { 396 __be32 status; 397 398 fh_put(&cstate->current_fh); 399 status = exp_pseudoroot(rqstp, &cstate->current_fh); 400 return status; 401 } 402 403 static __be32 404 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 405 void *arg) 406 { 407 if (!cstate->save_fh.fh_dentry) 408 return nfserr_restorefh; 409 410 fh_dup2(&cstate->current_fh, &cstate->save_fh); 411 return nfs_ok; 412 } 413 414 static __be32 415 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 416 void *arg) 417 { 418 if (!cstate->current_fh.fh_dentry) 419 return nfserr_nofilehandle; 420 421 fh_dup2(&cstate->save_fh, &cstate->current_fh); 422 return nfs_ok; 423 } 424 425 /* 426 * misc nfsv4 ops 427 */ 428 static __be32 429 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 430 struct nfsd4_access *access) 431 { 432 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 433 return nfserr_inval; 434 435 access->ac_resp_access = access->ac_req_access; 436 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 437 &access->ac_supported); 438 } 439 440 static __be32 441 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 442 struct nfsd4_commit *commit) 443 { 444 __be32 status; 445 446 u32 *p = (u32 *)commit->co_verf.data; 447 *p++ = nfssvc_boot.tv_sec; 448 *p++ = nfssvc_boot.tv_usec; 449 450 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 451 commit->co_count); 452 if (status == nfserr_symlink) 453 status = nfserr_inval; 454 return status; 455 } 456 457 static __be32 458 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 459 struct nfsd4_create *create) 460 { 461 struct svc_fh resfh; 462 __be32 status; 463 dev_t rdev; 464 465 fh_init(&resfh, NFS4_FHSIZE); 466 467 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 468 NFSD_MAY_CREATE); 469 if (status == nfserr_symlink) 470 status = nfserr_notdir; 471 if (status) 472 return status; 473 474 status = check_attr_support(rqstp, cstate, create->cr_bmval, 475 nfsd_attrmask); 476 if (status) 477 return status; 478 479 switch (create->cr_type) { 480 case NF4LNK: 481 /* ugh! we have to null-terminate the linktext, or 482 * vfs_symlink() will choke. it is always safe to 483 * null-terminate by brute force, since at worst we 484 * will overwrite the first byte of the create namelen 485 * in the XDR buffer, which has already been extracted 486 * during XDR decode. 487 */ 488 create->cr_linkname[create->cr_linklen] = 0; 489 490 status = nfsd_symlink(rqstp, &cstate->current_fh, 491 create->cr_name, create->cr_namelen, 492 create->cr_linkname, create->cr_linklen, 493 &resfh, &create->cr_iattr); 494 break; 495 496 case NF4BLK: 497 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 498 if (MAJOR(rdev) != create->cr_specdata1 || 499 MINOR(rdev) != create->cr_specdata2) 500 return nfserr_inval; 501 status = nfsd_create(rqstp, &cstate->current_fh, 502 create->cr_name, create->cr_namelen, 503 &create->cr_iattr, S_IFBLK, rdev, &resfh); 504 break; 505 506 case NF4CHR: 507 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 508 if (MAJOR(rdev) != create->cr_specdata1 || 509 MINOR(rdev) != create->cr_specdata2) 510 return nfserr_inval; 511 status = nfsd_create(rqstp, &cstate->current_fh, 512 create->cr_name, create->cr_namelen, 513 &create->cr_iattr,S_IFCHR, rdev, &resfh); 514 break; 515 516 case NF4SOCK: 517 status = nfsd_create(rqstp, &cstate->current_fh, 518 create->cr_name, create->cr_namelen, 519 &create->cr_iattr, S_IFSOCK, 0, &resfh); 520 break; 521 522 case NF4FIFO: 523 status = nfsd_create(rqstp, &cstate->current_fh, 524 create->cr_name, create->cr_namelen, 525 &create->cr_iattr, S_IFIFO, 0, &resfh); 526 break; 527 528 case NF4DIR: 529 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 530 status = nfsd_create(rqstp, &cstate->current_fh, 531 create->cr_name, create->cr_namelen, 532 &create->cr_iattr, S_IFDIR, 0, &resfh); 533 break; 534 535 default: 536 status = nfserr_badtype; 537 } 538 539 if (!status) { 540 fh_unlock(&cstate->current_fh); 541 set_change_info(&create->cr_cinfo, &cstate->current_fh); 542 fh_dup2(&cstate->current_fh, &resfh); 543 } 544 545 fh_put(&resfh); 546 return status; 547 } 548 549 static __be32 550 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 551 struct nfsd4_getattr *getattr) 552 { 553 __be32 status; 554 555 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 556 if (status) 557 return status; 558 559 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 560 return nfserr_inval; 561 562 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 563 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 564 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 565 566 getattr->ga_fhp = &cstate->current_fh; 567 return nfs_ok; 568 } 569 570 static __be32 571 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 572 struct nfsd4_link *link) 573 { 574 __be32 status = nfserr_nofilehandle; 575 576 if (!cstate->save_fh.fh_dentry) 577 return status; 578 status = nfsd_link(rqstp, &cstate->current_fh, 579 link->li_name, link->li_namelen, &cstate->save_fh); 580 if (!status) 581 set_change_info(&link->li_cinfo, &cstate->current_fh); 582 return status; 583 } 584 585 static __be32 586 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 587 void *arg) 588 { 589 struct svc_fh tmp_fh; 590 __be32 ret; 591 592 fh_init(&tmp_fh, NFS4_FHSIZE); 593 ret = exp_pseudoroot(rqstp, &tmp_fh); 594 if (ret) 595 return ret; 596 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) { 597 fh_put(&tmp_fh); 598 return nfserr_noent; 599 } 600 fh_put(&tmp_fh); 601 return nfsd_lookup(rqstp, &cstate->current_fh, 602 "..", 2, &cstate->current_fh); 603 } 604 605 static __be32 606 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 607 struct nfsd4_lookup *lookup) 608 { 609 return nfsd_lookup(rqstp, &cstate->current_fh, 610 lookup->lo_name, lookup->lo_len, 611 &cstate->current_fh); 612 } 613 614 static __be32 615 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 616 struct nfsd4_read *read) 617 { 618 __be32 status; 619 620 /* no need to check permission - this will be done in nfsd_read() */ 621 622 read->rd_filp = NULL; 623 if (read->rd_offset >= OFFSET_MAX) 624 return nfserr_inval; 625 626 nfs4_lock_state(); 627 /* check stateid */ 628 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid, 629 RD_STATE, &read->rd_filp))) { 630 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 631 goto out; 632 } 633 if (read->rd_filp) 634 get_file(read->rd_filp); 635 status = nfs_ok; 636 out: 637 nfs4_unlock_state(); 638 read->rd_rqstp = rqstp; 639 read->rd_fhp = &cstate->current_fh; 640 return status; 641 } 642 643 static __be32 644 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 645 struct nfsd4_readdir *readdir) 646 { 647 u64 cookie = readdir->rd_cookie; 648 static const nfs4_verifier zeroverf; 649 650 /* no need to check permission - this will be done in nfsd_readdir() */ 651 652 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 653 return nfserr_inval; 654 655 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 656 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 657 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 658 659 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) || 660 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 661 return nfserr_bad_cookie; 662 663 readdir->rd_rqstp = rqstp; 664 readdir->rd_fhp = &cstate->current_fh; 665 return nfs_ok; 666 } 667 668 static __be32 669 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 670 struct nfsd4_readlink *readlink) 671 { 672 readlink->rl_rqstp = rqstp; 673 readlink->rl_fhp = &cstate->current_fh; 674 return nfs_ok; 675 } 676 677 static __be32 678 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 679 struct nfsd4_remove *remove) 680 { 681 __be32 status; 682 683 if (locks_in_grace()) 684 return nfserr_grace; 685 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 686 remove->rm_name, remove->rm_namelen); 687 if (status == nfserr_symlink) 688 return nfserr_notdir; 689 if (!status) { 690 fh_unlock(&cstate->current_fh); 691 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 692 } 693 return status; 694 } 695 696 static __be32 697 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 698 struct nfsd4_rename *rename) 699 { 700 __be32 status = nfserr_nofilehandle; 701 702 if (!cstate->save_fh.fh_dentry) 703 return status; 704 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags 705 & NFSEXP_NOSUBTREECHECK)) 706 return nfserr_grace; 707 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 708 rename->rn_snamelen, &cstate->current_fh, 709 rename->rn_tname, rename->rn_tnamelen); 710 711 /* the underlying filesystem returns different error's than required 712 * by NFSv4. both save_fh and current_fh have been verified.. */ 713 if (status == nfserr_isdir) 714 status = nfserr_exist; 715 else if ((status == nfserr_notdir) && 716 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) && 717 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode))) 718 status = nfserr_exist; 719 else if (status == nfserr_symlink) 720 status = nfserr_notdir; 721 722 if (!status) { 723 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 724 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 725 } 726 return status; 727 } 728 729 static __be32 730 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 731 struct nfsd4_secinfo *secinfo) 732 { 733 struct svc_fh resfh; 734 struct svc_export *exp; 735 struct dentry *dentry; 736 __be32 err; 737 738 fh_init(&resfh, NFS4_FHSIZE); 739 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 740 secinfo->si_name, secinfo->si_namelen, 741 &exp, &dentry); 742 if (err) 743 return err; 744 if (dentry->d_inode == NULL) { 745 exp_put(exp); 746 err = nfserr_noent; 747 } else 748 secinfo->si_exp = exp; 749 dput(dentry); 750 return err; 751 } 752 753 static __be32 754 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 755 struct nfsd4_setattr *setattr) 756 { 757 __be32 status = nfs_ok; 758 759 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 760 nfs4_lock_state(); 761 status = nfs4_preprocess_stateid_op(cstate, 762 &setattr->sa_stateid, WR_STATE, NULL); 763 nfs4_unlock_state(); 764 if (status) { 765 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 766 return status; 767 } 768 } 769 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt); 770 if (status) 771 return status; 772 status = nfs_ok; 773 774 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 775 nfsd_attrmask); 776 if (status) 777 goto out; 778 779 if (setattr->sa_acl != NULL) 780 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 781 setattr->sa_acl); 782 if (status) 783 goto out; 784 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 785 0, (time_t)0); 786 out: 787 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt); 788 return status; 789 } 790 791 static __be32 792 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 793 struct nfsd4_write *write) 794 { 795 stateid_t *stateid = &write->wr_stateid; 796 struct file *filp = NULL; 797 u32 *p; 798 __be32 status = nfs_ok; 799 unsigned long cnt; 800 801 /* no need to check permission - this will be done in nfsd_write() */ 802 803 if (write->wr_offset >= OFFSET_MAX) 804 return nfserr_inval; 805 806 nfs4_lock_state(); 807 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp); 808 if (filp) 809 get_file(filp); 810 nfs4_unlock_state(); 811 812 if (status) { 813 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 814 return status; 815 } 816 817 cnt = write->wr_buflen; 818 write->wr_how_written = write->wr_stable_how; 819 p = (u32 *)write->wr_verifier.data; 820 *p++ = nfssvc_boot.tv_sec; 821 *p++ = nfssvc_boot.tv_usec; 822 823 status = nfsd_write(rqstp, &cstate->current_fh, filp, 824 write->wr_offset, rqstp->rq_vec, write->wr_vlen, 825 &cnt, &write->wr_how_written); 826 if (filp) 827 fput(filp); 828 829 write->wr_bytes_written = cnt; 830 831 if (status == nfserr_symlink) 832 status = nfserr_inval; 833 return status; 834 } 835 836 /* This routine never returns NFS_OK! If there are no other errors, it 837 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 838 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 839 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 840 */ 841 static __be32 842 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 843 struct nfsd4_verify *verify) 844 { 845 __be32 *buf, *p; 846 int count; 847 __be32 status; 848 849 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 850 if (status) 851 return status; 852 853 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 854 if (status) 855 return status; 856 857 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 858 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 859 return nfserr_inval; 860 if (verify->ve_attrlen & 3) 861 return nfserr_inval; 862 863 /* count in words: 864 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 865 */ 866 count = 4 + (verify->ve_attrlen >> 2); 867 buf = kmalloc(count << 2, GFP_KERNEL); 868 if (!buf) 869 return nfserr_resource; 870 871 status = nfsd4_encode_fattr(&cstate->current_fh, 872 cstate->current_fh.fh_export, 873 cstate->current_fh.fh_dentry, buf, 874 &count, verify->ve_bmval, 875 rqstp, 0); 876 877 /* this means that nfsd4_encode_fattr() ran out of space */ 878 if (status == nfserr_resource && count == 0) 879 status = nfserr_not_same; 880 if (status) 881 goto out_kfree; 882 883 /* skip bitmap */ 884 p = buf + 1 + ntohl(buf[0]); 885 status = nfserr_not_same; 886 if (ntohl(*p++) != verify->ve_attrlen) 887 goto out_kfree; 888 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 889 status = nfserr_same; 890 891 out_kfree: 892 kfree(buf); 893 return status; 894 } 895 896 static __be32 897 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 898 struct nfsd4_verify *verify) 899 { 900 __be32 status; 901 902 status = _nfsd4_verify(rqstp, cstate, verify); 903 return status == nfserr_not_same ? nfs_ok : status; 904 } 905 906 static __be32 907 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 908 struct nfsd4_verify *verify) 909 { 910 __be32 status; 911 912 status = _nfsd4_verify(rqstp, cstate, verify); 913 return status == nfserr_same ? nfs_ok : status; 914 } 915 916 /* 917 * NULL call. 918 */ 919 static __be32 920 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 921 { 922 return nfs_ok; 923 } 924 925 static inline void nfsd4_increment_op_stats(u32 opnum) 926 { 927 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 928 nfsdstats.nfs4_opcount[opnum]++; 929 } 930 931 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 932 void *); 933 enum nfsd4_op_flags { 934 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 935 ALLOWED_ON_ABSENT_FS = 2 << 0, /* ops processed on absent fs */ 936 ALLOWED_AS_FIRST_OP = 3 << 0, /* ops reqired first in compound */ 937 }; 938 939 struct nfsd4_operation { 940 nfsd4op_func op_func; 941 u32 op_flags; 942 char *op_name; 943 }; 944 945 static struct nfsd4_operation nfsd4_ops[]; 946 947 static const char *nfsd4_op_name(unsigned opnum); 948 949 /* 950 * This is a replay of a compound for which no cache entry pages 951 * were used. Encode the sequence operation, and if cachethis is FALSE 952 * encode the uncache rep error on the next operation. 953 */ 954 static __be32 955 nfsd4_enc_uncached_replay(struct nfsd4_compoundargs *args, 956 struct nfsd4_compoundres *resp) 957 { 958 struct nfsd4_op *op; 959 960 dprintk("--> %s resp->opcnt %d ce_cachethis %u \n", __func__, 961 resp->opcnt, resp->cstate.slot->sl_cache_entry.ce_cachethis); 962 963 /* Encode the replayed sequence operation */ 964 BUG_ON(resp->opcnt != 1); 965 op = &args->ops[resp->opcnt - 1]; 966 nfsd4_encode_operation(resp, op); 967 968 /*return nfserr_retry_uncached_rep in next operation. */ 969 if (resp->cstate.slot->sl_cache_entry.ce_cachethis == 0) { 970 op = &args->ops[resp->opcnt++]; 971 op->status = nfserr_retry_uncached_rep; 972 nfsd4_encode_operation(resp, op); 973 } 974 return op->status; 975 } 976 977 /* 978 * Enforce NFSv4.1 COMPOUND ordering rules. 979 * 980 * TODO: 981 * - enforce NFS4ERR_NOT_ONLY_OP, 982 * - DESTROY_SESSION MUST be the final operation in the COMPOUND request. 983 */ 984 static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs *args) 985 { 986 if (args->minorversion && args->opcnt > 0) { 987 struct nfsd4_op *op = &args->ops[0]; 988 return (op->status == nfserr_op_illegal) || 989 (nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP); 990 } 991 return true; 992 } 993 994 /* 995 * COMPOUND call. 996 */ 997 static __be32 998 nfsd4_proc_compound(struct svc_rqst *rqstp, 999 struct nfsd4_compoundargs *args, 1000 struct nfsd4_compoundres *resp) 1001 { 1002 struct nfsd4_op *op; 1003 struct nfsd4_operation *opdesc; 1004 struct nfsd4_compound_state *cstate = &resp->cstate; 1005 int slack_bytes; 1006 __be32 status; 1007 1008 resp->xbuf = &rqstp->rq_res; 1009 resp->p = rqstp->rq_res.head[0].iov_base + 1010 rqstp->rq_res.head[0].iov_len; 1011 resp->tagp = resp->p; 1012 /* reserve space for: taglen, tag, and opcnt */ 1013 resp->p += 2 + XDR_QUADLEN(args->taglen); 1014 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; 1015 resp->taglen = args->taglen; 1016 resp->tag = args->tag; 1017 resp->opcnt = 0; 1018 resp->rqstp = rqstp; 1019 resp->cstate.minorversion = args->minorversion; 1020 resp->cstate.replay_owner = NULL; 1021 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); 1022 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); 1023 /* Use the deferral mechanism only for NFSv4.0 compounds */ 1024 rqstp->rq_usedeferral = (args->minorversion == 0); 1025 1026 /* 1027 * According to RFC3010, this takes precedence over all other errors. 1028 */ 1029 status = nfserr_minor_vers_mismatch; 1030 if (args->minorversion > nfsd_supported_minorversion) 1031 goto out; 1032 1033 if (!nfs41_op_ordering_ok(args)) { 1034 op = &args->ops[0]; 1035 op->status = nfserr_sequence_pos; 1036 goto encode_op; 1037 } 1038 1039 status = nfs_ok; 1040 while (!status && resp->opcnt < args->opcnt) { 1041 op = &args->ops[resp->opcnt++]; 1042 1043 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1044 resp->opcnt, args->opcnt, op->opnum, 1045 nfsd4_op_name(op->opnum)); 1046 /* 1047 * The XDR decode routines may have pre-set op->status; 1048 * for example, if there is a miscellaneous XDR error 1049 * it will be set to nfserr_bad_xdr. 1050 */ 1051 if (op->status) 1052 goto encode_op; 1053 1054 /* We must be able to encode a successful response to 1055 * this operation, with enough room left over to encode a 1056 * failed response to the next operation. If we don't 1057 * have enough room, fail with ERR_RESOURCE. 1058 */ 1059 slack_bytes = (char *)resp->end - (char *)resp->p; 1060 if (slack_bytes < COMPOUND_SLACK_SPACE 1061 + COMPOUND_ERR_SLACK_SPACE) { 1062 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); 1063 op->status = nfserr_resource; 1064 goto encode_op; 1065 } 1066 1067 opdesc = &nfsd4_ops[op->opnum]; 1068 1069 if (!cstate->current_fh.fh_dentry) { 1070 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1071 op->status = nfserr_nofilehandle; 1072 goto encode_op; 1073 } 1074 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && 1075 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1076 op->status = nfserr_moved; 1077 goto encode_op; 1078 } 1079 1080 if (opdesc->op_func) 1081 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1082 else 1083 BUG_ON(op->status == nfs_ok); 1084 1085 encode_op: 1086 /* Only from SEQUENCE or CREATE_SESSION */ 1087 if (resp->cstate.status == nfserr_replay_cache) { 1088 dprintk("%s NFS4.1 replay from cache\n", __func__); 1089 if (nfsd4_not_cached(resp)) 1090 status = nfsd4_enc_uncached_replay(args, resp); 1091 else 1092 status = op->status; 1093 goto out; 1094 } 1095 if (op->status == nfserr_replay_me) { 1096 op->replay = &cstate->replay_owner->so_replay; 1097 nfsd4_encode_replay(resp, op); 1098 status = op->status = op->replay->rp_status; 1099 } else { 1100 nfsd4_encode_operation(resp, op); 1101 status = op->status; 1102 } 1103 1104 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1105 args->ops, args->opcnt, resp->opcnt, op->opnum, 1106 be32_to_cpu(status)); 1107 1108 if (cstate->replay_owner) { 1109 nfs4_put_stateowner(cstate->replay_owner); 1110 cstate->replay_owner = NULL; 1111 } 1112 /* XXX Ugh, we need to get rid of this kind of special case: */ 1113 if (op->opnum == OP_READ && op->u.read.rd_filp) 1114 fput(op->u.read.rd_filp); 1115 1116 nfsd4_increment_op_stats(op->opnum); 1117 } 1118 if (!rqstp->rq_usedeferral && status == nfserr_dropit) { 1119 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__); 1120 status = nfserr_jukebox; 1121 } 1122 1123 resp->cstate.status = status; 1124 fh_put(&resp->cstate.current_fh); 1125 fh_put(&resp->cstate.save_fh); 1126 BUG_ON(resp->cstate.replay_owner); 1127 out: 1128 nfsd4_release_compoundargs(args); 1129 /* Reset deferral mechanism for RPC deferrals */ 1130 rqstp->rq_usedeferral = 1; 1131 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1132 return status; 1133 } 1134 1135 static struct nfsd4_operation nfsd4_ops[] = { 1136 [OP_ACCESS] = { 1137 .op_func = (nfsd4op_func)nfsd4_access, 1138 .op_name = "OP_ACCESS", 1139 }, 1140 [OP_CLOSE] = { 1141 .op_func = (nfsd4op_func)nfsd4_close, 1142 .op_name = "OP_CLOSE", 1143 }, 1144 [OP_COMMIT] = { 1145 .op_func = (nfsd4op_func)nfsd4_commit, 1146 .op_name = "OP_COMMIT", 1147 }, 1148 [OP_CREATE] = { 1149 .op_func = (nfsd4op_func)nfsd4_create, 1150 .op_name = "OP_CREATE", 1151 }, 1152 [OP_DELEGRETURN] = { 1153 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1154 .op_name = "OP_DELEGRETURN", 1155 }, 1156 [OP_GETATTR] = { 1157 .op_func = (nfsd4op_func)nfsd4_getattr, 1158 .op_flags = ALLOWED_ON_ABSENT_FS, 1159 .op_name = "OP_GETATTR", 1160 }, 1161 [OP_GETFH] = { 1162 .op_func = (nfsd4op_func)nfsd4_getfh, 1163 .op_name = "OP_GETFH", 1164 }, 1165 [OP_LINK] = { 1166 .op_func = (nfsd4op_func)nfsd4_link, 1167 .op_name = "OP_LINK", 1168 }, 1169 [OP_LOCK] = { 1170 .op_func = (nfsd4op_func)nfsd4_lock, 1171 .op_name = "OP_LOCK", 1172 }, 1173 [OP_LOCKT] = { 1174 .op_func = (nfsd4op_func)nfsd4_lockt, 1175 .op_name = "OP_LOCKT", 1176 }, 1177 [OP_LOCKU] = { 1178 .op_func = (nfsd4op_func)nfsd4_locku, 1179 .op_name = "OP_LOCKU", 1180 }, 1181 [OP_LOOKUP] = { 1182 .op_func = (nfsd4op_func)nfsd4_lookup, 1183 .op_name = "OP_LOOKUP", 1184 }, 1185 [OP_LOOKUPP] = { 1186 .op_func = (nfsd4op_func)nfsd4_lookupp, 1187 .op_name = "OP_LOOKUPP", 1188 }, 1189 [OP_NVERIFY] = { 1190 .op_func = (nfsd4op_func)nfsd4_nverify, 1191 .op_name = "OP_NVERIFY", 1192 }, 1193 [OP_OPEN] = { 1194 .op_func = (nfsd4op_func)nfsd4_open, 1195 .op_name = "OP_OPEN", 1196 }, 1197 [OP_OPEN_CONFIRM] = { 1198 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1199 .op_name = "OP_OPEN_CONFIRM", 1200 }, 1201 [OP_OPEN_DOWNGRADE] = { 1202 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1203 .op_name = "OP_OPEN_DOWNGRADE", 1204 }, 1205 [OP_PUTFH] = { 1206 .op_func = (nfsd4op_func)nfsd4_putfh, 1207 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1208 .op_name = "OP_PUTFH", 1209 }, 1210 [OP_PUTPUBFH] = { 1211 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1212 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1213 .op_name = "OP_PUTPUBFH", 1214 }, 1215 [OP_PUTROOTFH] = { 1216 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1217 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1218 .op_name = "OP_PUTROOTFH", 1219 }, 1220 [OP_READ] = { 1221 .op_func = (nfsd4op_func)nfsd4_read, 1222 .op_name = "OP_READ", 1223 }, 1224 [OP_READDIR] = { 1225 .op_func = (nfsd4op_func)nfsd4_readdir, 1226 .op_name = "OP_READDIR", 1227 }, 1228 [OP_READLINK] = { 1229 .op_func = (nfsd4op_func)nfsd4_readlink, 1230 .op_name = "OP_READLINK", 1231 }, 1232 [OP_REMOVE] = { 1233 .op_func = (nfsd4op_func)nfsd4_remove, 1234 .op_name = "OP_REMOVE", 1235 }, 1236 [OP_RENAME] = { 1237 .op_name = "OP_RENAME", 1238 .op_func = (nfsd4op_func)nfsd4_rename, 1239 }, 1240 [OP_RENEW] = { 1241 .op_func = (nfsd4op_func)nfsd4_renew, 1242 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1243 .op_name = "OP_RENEW", 1244 }, 1245 [OP_RESTOREFH] = { 1246 .op_func = (nfsd4op_func)nfsd4_restorefh, 1247 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1248 .op_name = "OP_RESTOREFH", 1249 }, 1250 [OP_SAVEFH] = { 1251 .op_func = (nfsd4op_func)nfsd4_savefh, 1252 .op_name = "OP_SAVEFH", 1253 }, 1254 [OP_SECINFO] = { 1255 .op_func = (nfsd4op_func)nfsd4_secinfo, 1256 .op_name = "OP_SECINFO", 1257 }, 1258 [OP_SETATTR] = { 1259 .op_func = (nfsd4op_func)nfsd4_setattr, 1260 .op_name = "OP_SETATTR", 1261 }, 1262 [OP_SETCLIENTID] = { 1263 .op_func = (nfsd4op_func)nfsd4_setclientid, 1264 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1265 .op_name = "OP_SETCLIENTID", 1266 }, 1267 [OP_SETCLIENTID_CONFIRM] = { 1268 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1269 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1270 .op_name = "OP_SETCLIENTID_CONFIRM", 1271 }, 1272 [OP_VERIFY] = { 1273 .op_func = (nfsd4op_func)nfsd4_verify, 1274 .op_name = "OP_VERIFY", 1275 }, 1276 [OP_WRITE] = { 1277 .op_func = (nfsd4op_func)nfsd4_write, 1278 .op_name = "OP_WRITE", 1279 }, 1280 [OP_RELEASE_LOCKOWNER] = { 1281 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1282 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1283 .op_name = "OP_RELEASE_LOCKOWNER", 1284 }, 1285 1286 /* NFSv4.1 operations */ 1287 [OP_EXCHANGE_ID] = { 1288 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1289 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1290 .op_name = "OP_EXCHANGE_ID", 1291 }, 1292 [OP_CREATE_SESSION] = { 1293 .op_func = (nfsd4op_func)nfsd4_create_session, 1294 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1295 .op_name = "OP_CREATE_SESSION", 1296 }, 1297 [OP_DESTROY_SESSION] = { 1298 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1299 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1300 .op_name = "OP_DESTROY_SESSION", 1301 }, 1302 [OP_SEQUENCE] = { 1303 .op_func = (nfsd4op_func)nfsd4_sequence, 1304 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1305 .op_name = "OP_SEQUENCE", 1306 }, 1307 }; 1308 1309 static const char *nfsd4_op_name(unsigned opnum) 1310 { 1311 if (opnum < ARRAY_SIZE(nfsd4_ops)) 1312 return nfsd4_ops[opnum].op_name; 1313 return "unknown_operation"; 1314 } 1315 1316 #define nfsd4_voidres nfsd4_voidargs 1317 struct nfsd4_voidargs { int dummy; }; 1318 1319 /* 1320 * TODO: At the present time, the NFSv4 server does not do XID caching 1321 * of requests. Implementing XID caching would not be a serious problem, 1322 * although it would require a mild change in interfaces since one 1323 * doesn't know whether an NFSv4 request is idempotent until after the 1324 * XDR decode. However, XID caching totally confuses pynfs (Peter 1325 * Astrand's regression testsuite for NFSv4 servers), which reuses 1326 * XID's liberally, so I've left it unimplemented until pynfs generates 1327 * better XID's. 1328 */ 1329 static struct svc_procedure nfsd_procedures4[2] = { 1330 [NFSPROC4_NULL] = { 1331 .pc_func = (svc_procfunc) nfsd4_proc_null, 1332 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 1333 .pc_argsize = sizeof(struct nfsd4_voidargs), 1334 .pc_ressize = sizeof(struct nfsd4_voidres), 1335 .pc_cachetype = RC_NOCACHE, 1336 .pc_xdrressize = 1, 1337 }, 1338 [NFSPROC4_COMPOUND] = { 1339 .pc_func = (svc_procfunc) nfsd4_proc_compound, 1340 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 1341 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 1342 .pc_argsize = sizeof(struct nfsd4_compoundargs), 1343 .pc_ressize = sizeof(struct nfsd4_compoundres), 1344 .pc_cachetype = RC_NOCACHE, 1345 .pc_xdrressize = NFSD_BUFSIZE/4, 1346 }, 1347 }; 1348 1349 struct svc_version nfsd_version4 = { 1350 .vs_vers = 4, 1351 .vs_nproc = 2, 1352 .vs_proc = nfsd_procedures4, 1353 .vs_dispatch = nfsd_dispatch, 1354 .vs_xdrsize = NFS4_SVC_XDRSIZE, 1355 }; 1356 1357 /* 1358 * Local variables: 1359 * c-basic-offset: 8 1360 * End: 1361 */ 1362