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 37 #include "cache.h" 38 #include "xdr4.h" 39 #include "vfs.h" 40 41 #define NFSDDBG_FACILITY NFSDDBG_PROC 42 43 static u32 nfsd_attrmask[] = { 44 NFSD_WRITEABLE_ATTRS_WORD0, 45 NFSD_WRITEABLE_ATTRS_WORD1, 46 NFSD_WRITEABLE_ATTRS_WORD2 47 }; 48 49 static u32 nfsd41_ex_attrmask[] = { 50 NFSD_SUPPATTR_EXCLCREAT_WORD0, 51 NFSD_SUPPATTR_EXCLCREAT_WORD1, 52 NFSD_SUPPATTR_EXCLCREAT_WORD2 53 }; 54 55 static __be32 56 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 57 u32 *bmval, u32 *writable) 58 { 59 struct dentry *dentry = cstate->current_fh.fh_dentry; 60 61 /* 62 * Check about attributes are supported by the NFSv4 server or not. 63 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. 64 */ 65 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || 66 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || 67 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) 68 return nfserr_attrnotsupp; 69 70 /* 71 * Check FATTR4_WORD0_ACL can be supported 72 * in current environment or not. 73 */ 74 if (bmval[0] & FATTR4_WORD0_ACL) { 75 if (!IS_POSIXACL(dentry->d_inode)) 76 return nfserr_attrnotsupp; 77 } 78 79 /* 80 * According to spec, read-only attributes return ERR_INVAL. 81 */ 82 if (writable) { 83 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || 84 (bmval[2] & ~writable[2])) 85 return nfserr_inval; 86 } 87 88 return nfs_ok; 89 } 90 91 static __be32 92 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 93 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 94 { 95 __be32 status = nfs_ok; 96 97 if (open->op_create == NFS4_OPEN_CREATE) { 98 if (open->op_createmode == NFS4_CREATE_UNCHECKED 99 || open->op_createmode == NFS4_CREATE_GUARDED) 100 status = check_attr_support(rqstp, cstate, 101 open->op_bmval, nfsd_attrmask); 102 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 103 status = check_attr_support(rqstp, cstate, 104 open->op_bmval, nfsd41_ex_attrmask); 105 } 106 107 return status; 108 } 109 110 static int 111 is_create_with_attrs(struct nfsd4_open *open) 112 { 113 return open->op_create == NFS4_OPEN_CREATE 114 && (open->op_createmode == NFS4_CREATE_UNCHECKED 115 || open->op_createmode == NFS4_CREATE_GUARDED 116 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 117 } 118 119 /* 120 * if error occurs when setting the acl, just clear the acl bit 121 * in the returned attr bitmap. 122 */ 123 static void 124 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 125 struct nfs4_acl *acl, u32 *bmval) 126 { 127 __be32 status; 128 129 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 130 if (status) 131 /* 132 * We should probably fail the whole open at this point, 133 * but we've already created the file, so it's too late; 134 * So this seems the least of evils: 135 */ 136 bmval[0] &= ~FATTR4_WORD0_ACL; 137 } 138 139 static inline void 140 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 141 { 142 fh_put(dst); 143 dget(src->fh_dentry); 144 if (src->fh_export) 145 cache_get(&src->fh_export->h); 146 *dst = *src; 147 } 148 149 static __be32 150 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 151 { 152 __be32 status; 153 154 if (open->op_truncate && 155 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 156 return nfserr_inval; 157 158 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 159 accmode |= NFSD_MAY_READ; 160 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 161 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 162 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 163 accmode |= NFSD_MAY_WRITE; 164 165 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 166 167 return status; 168 } 169 170 static __be32 171 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 172 { 173 struct svc_fh resfh; 174 __be32 status; 175 int created = 0; 176 177 fh_init(&resfh, NFS4_FHSIZE); 178 open->op_truncate = 0; 179 180 if (open->op_create) { 181 /* FIXME: check session persistence and pnfs flags. 182 * The nfsv4.1 spec requires the following semantics: 183 * 184 * Persistent | pNFS | Server REQUIRED | Client Allowed 185 * Reply Cache | server | | 186 * -------------+--------+-----------------+-------------------- 187 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 188 * | | | (SHOULD) 189 * | | and EXCLUSIVE4 | or EXCLUSIVE4 190 * | | | (SHOULD NOT) 191 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 192 * yes | no | GUARDED4 | GUARDED4 193 * yes | yes | GUARDED4 | GUARDED4 194 */ 195 196 /* 197 * Note: create modes (UNCHECKED,GUARDED...) are the same 198 * in NFSv4 as in v3. 199 */ 200 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data, 201 open->op_fname.len, &open->op_iattr, 202 &resfh, open->op_createmode, 203 (u32 *)open->op_verf.data, 204 &open->op_truncate, &created); 205 206 /* 207 * Following rfc 3530 14.2.16, use the returned bitmask 208 * to indicate which attributes we used to store the 209 * verifier: 210 */ 211 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) 212 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | 213 FATTR4_WORD1_TIME_MODIFY); 214 } else { 215 status = nfsd_lookup(rqstp, current_fh, 216 open->op_fname.data, open->op_fname.len, &resfh); 217 fh_unlock(current_fh); 218 } 219 if (status) 220 goto out; 221 222 if (is_create_with_attrs(open) && open->op_acl != NULL) 223 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval); 224 225 set_change_info(&open->op_cinfo, current_fh); 226 fh_dup2(current_fh, &resfh); 227 228 /* set reply cache */ 229 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, 230 &resfh.fh_handle); 231 if (!created) 232 status = do_open_permission(rqstp, current_fh, open, 233 NFSD_MAY_NOP); 234 235 out: 236 fh_put(&resfh); 237 return status; 238 } 239 240 static __be32 241 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 242 { 243 __be32 status; 244 245 /* Only reclaims from previously confirmed clients are valid */ 246 if ((status = nfs4_check_open_reclaim(&open->op_clientid))) 247 return status; 248 249 /* We don't know the target directory, and therefore can not 250 * set the change info 251 */ 252 253 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 254 255 /* set replay cache */ 256 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, 257 ¤t_fh->fh_handle); 258 259 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 260 (open->op_iattr.ia_size == 0); 261 262 status = do_open_permission(rqstp, current_fh, open, 263 NFSD_MAY_OWNER_OVERRIDE); 264 265 return status; 266 } 267 268 static void 269 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 270 { 271 struct nfsd4_sessionid *sid = 272 (struct nfsd4_sessionid *)session->se_sessionid.data; 273 274 clid->cl_boot = sid->clientid.cl_boot; 275 clid->cl_id = sid->clientid.cl_id; 276 } 277 278 static __be32 279 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 280 struct nfsd4_open *open) 281 { 282 __be32 status; 283 struct nfsd4_compoundres *resp; 284 285 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n", 286 (int)open->op_fname.len, open->op_fname.data, 287 open->op_stateowner); 288 289 /* This check required by spec. */ 290 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 291 return nfserr_inval; 292 293 if (nfsd4_has_session(cstate)) 294 copy_clientid(&open->op_clientid, cstate->session); 295 296 nfs4_lock_state(); 297 298 /* check seqid for replay. set nfs4_owner */ 299 resp = rqstp->rq_resp; 300 status = nfsd4_process_open1(&resp->cstate, open); 301 if (status == nfserr_replay_me) { 302 struct nfs4_replay *rp = &open->op_stateowner->so_replay; 303 fh_put(&cstate->current_fh); 304 fh_copy_shallow(&cstate->current_fh.fh_handle, 305 &rp->rp_openfh); 306 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 307 if (status) 308 dprintk("nfsd4_open: replay failed" 309 " restoring previous filehandle\n"); 310 else 311 status = nfserr_replay_me; 312 } 313 if (status) 314 goto out; 315 316 status = nfsd4_check_open_attributes(rqstp, cstate, open); 317 if (status) 318 goto out; 319 320 /* Openowner is now set, so sequence id will get bumped. Now we need 321 * these checks before we do any creates: */ 322 status = nfserr_grace; 323 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 324 goto out; 325 status = nfserr_no_grace; 326 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 327 goto out; 328 329 switch (open->op_claim_type) { 330 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 331 case NFS4_OPEN_CLAIM_NULL: 332 /* 333 * (1) set CURRENT_FH to the file being opened, 334 * creating it if necessary, (2) set open->op_cinfo, 335 * (3) set open->op_truncate if the file is to be 336 * truncated after opening, (4) do permission checking. 337 */ 338 status = do_open_lookup(rqstp, &cstate->current_fh, 339 open); 340 if (status) 341 goto out; 342 break; 343 case NFS4_OPEN_CLAIM_PREVIOUS: 344 open->op_stateowner->so_confirmed = 1; 345 /* 346 * The CURRENT_FH is already set to the file being 347 * opened. (1) set open->op_cinfo, (2) set 348 * open->op_truncate if the file is to be truncated 349 * after opening, (3) do permission checking. 350 */ 351 status = do_open_fhandle(rqstp, &cstate->current_fh, 352 open); 353 if (status) 354 goto out; 355 break; 356 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 357 open->op_stateowner->so_confirmed = 1; 358 dprintk("NFSD: unsupported OPEN claim type %d\n", 359 open->op_claim_type); 360 status = nfserr_notsupp; 361 goto out; 362 default: 363 dprintk("NFSD: Invalid OPEN claim type %d\n", 364 open->op_claim_type); 365 status = nfserr_inval; 366 goto out; 367 } 368 /* 369 * nfsd4_process_open2() does the actual opening of the file. If 370 * successful, it (1) truncates the file if open->op_truncate was 371 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 372 */ 373 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open); 374 out: 375 if (open->op_stateowner) { 376 nfs4_get_stateowner(open->op_stateowner); 377 cstate->replay_owner = open->op_stateowner; 378 } 379 nfs4_unlock_state(); 380 return status; 381 } 382 383 /* 384 * filehandle-manipulating ops. 385 */ 386 static __be32 387 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 388 struct svc_fh **getfh) 389 { 390 if (!cstate->current_fh.fh_dentry) 391 return nfserr_nofilehandle; 392 393 *getfh = &cstate->current_fh; 394 return nfs_ok; 395 } 396 397 static __be32 398 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 399 struct nfsd4_putfh *putfh) 400 { 401 fh_put(&cstate->current_fh); 402 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 403 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 404 putfh->pf_fhlen); 405 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 406 } 407 408 static __be32 409 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 410 void *arg) 411 { 412 __be32 status; 413 414 fh_put(&cstate->current_fh); 415 status = exp_pseudoroot(rqstp, &cstate->current_fh); 416 return status; 417 } 418 419 static __be32 420 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 421 void *arg) 422 { 423 if (!cstate->save_fh.fh_dentry) 424 return nfserr_restorefh; 425 426 fh_dup2(&cstate->current_fh, &cstate->save_fh); 427 return nfs_ok; 428 } 429 430 static __be32 431 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 432 void *arg) 433 { 434 if (!cstate->current_fh.fh_dentry) 435 return nfserr_nofilehandle; 436 437 fh_dup2(&cstate->save_fh, &cstate->current_fh); 438 return nfs_ok; 439 } 440 441 /* 442 * misc nfsv4 ops 443 */ 444 static __be32 445 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 446 struct nfsd4_access *access) 447 { 448 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 449 return nfserr_inval; 450 451 access->ac_resp_access = access->ac_req_access; 452 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 453 &access->ac_supported); 454 } 455 456 static __be32 457 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 458 struct nfsd4_commit *commit) 459 { 460 __be32 status; 461 462 u32 *p = (u32 *)commit->co_verf.data; 463 *p++ = nfssvc_boot.tv_sec; 464 *p++ = nfssvc_boot.tv_usec; 465 466 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 467 commit->co_count); 468 if (status == nfserr_symlink) 469 status = nfserr_inval; 470 return status; 471 } 472 473 static __be32 474 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 475 struct nfsd4_create *create) 476 { 477 struct svc_fh resfh; 478 __be32 status; 479 dev_t rdev; 480 481 fh_init(&resfh, NFS4_FHSIZE); 482 483 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 484 NFSD_MAY_CREATE); 485 if (status == nfserr_symlink) 486 status = nfserr_notdir; 487 if (status) 488 return status; 489 490 status = check_attr_support(rqstp, cstate, create->cr_bmval, 491 nfsd_attrmask); 492 if (status) 493 return status; 494 495 switch (create->cr_type) { 496 case NF4LNK: 497 /* ugh! we have to null-terminate the linktext, or 498 * vfs_symlink() will choke. it is always safe to 499 * null-terminate by brute force, since at worst we 500 * will overwrite the first byte of the create namelen 501 * in the XDR buffer, which has already been extracted 502 * during XDR decode. 503 */ 504 create->cr_linkname[create->cr_linklen] = 0; 505 506 status = nfsd_symlink(rqstp, &cstate->current_fh, 507 create->cr_name, create->cr_namelen, 508 create->cr_linkname, create->cr_linklen, 509 &resfh, &create->cr_iattr); 510 break; 511 512 case NF4BLK: 513 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 514 if (MAJOR(rdev) != create->cr_specdata1 || 515 MINOR(rdev) != create->cr_specdata2) 516 return nfserr_inval; 517 status = nfsd_create(rqstp, &cstate->current_fh, 518 create->cr_name, create->cr_namelen, 519 &create->cr_iattr, S_IFBLK, rdev, &resfh); 520 break; 521 522 case NF4CHR: 523 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 524 if (MAJOR(rdev) != create->cr_specdata1 || 525 MINOR(rdev) != create->cr_specdata2) 526 return nfserr_inval; 527 status = nfsd_create(rqstp, &cstate->current_fh, 528 create->cr_name, create->cr_namelen, 529 &create->cr_iattr,S_IFCHR, rdev, &resfh); 530 break; 531 532 case NF4SOCK: 533 status = nfsd_create(rqstp, &cstate->current_fh, 534 create->cr_name, create->cr_namelen, 535 &create->cr_iattr, S_IFSOCK, 0, &resfh); 536 break; 537 538 case NF4FIFO: 539 status = nfsd_create(rqstp, &cstate->current_fh, 540 create->cr_name, create->cr_namelen, 541 &create->cr_iattr, S_IFIFO, 0, &resfh); 542 break; 543 544 case NF4DIR: 545 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 546 status = nfsd_create(rqstp, &cstate->current_fh, 547 create->cr_name, create->cr_namelen, 548 &create->cr_iattr, S_IFDIR, 0, &resfh); 549 break; 550 551 default: 552 status = nfserr_badtype; 553 } 554 555 if (status) 556 goto out; 557 558 if (create->cr_acl != NULL) 559 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 560 create->cr_bmval); 561 562 fh_unlock(&cstate->current_fh); 563 set_change_info(&create->cr_cinfo, &cstate->current_fh); 564 fh_dup2(&cstate->current_fh, &resfh); 565 out: 566 fh_put(&resfh); 567 return status; 568 } 569 570 static __be32 571 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 572 struct nfsd4_getattr *getattr) 573 { 574 __be32 status; 575 576 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 577 if (status) 578 return status; 579 580 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 581 return nfserr_inval; 582 583 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 584 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 585 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 586 587 getattr->ga_fhp = &cstate->current_fh; 588 return nfs_ok; 589 } 590 591 static __be32 592 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 593 struct nfsd4_link *link) 594 { 595 __be32 status = nfserr_nofilehandle; 596 597 if (!cstate->save_fh.fh_dentry) 598 return status; 599 status = nfsd_link(rqstp, &cstate->current_fh, 600 link->li_name, link->li_namelen, &cstate->save_fh); 601 if (!status) 602 set_change_info(&link->li_cinfo, &cstate->current_fh); 603 return status; 604 } 605 606 static __be32 607 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 608 void *arg) 609 { 610 struct svc_fh tmp_fh; 611 __be32 ret; 612 613 fh_init(&tmp_fh, NFS4_FHSIZE); 614 ret = exp_pseudoroot(rqstp, &tmp_fh); 615 if (ret) 616 return ret; 617 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) { 618 fh_put(&tmp_fh); 619 return nfserr_noent; 620 } 621 fh_put(&tmp_fh); 622 return nfsd_lookup(rqstp, &cstate->current_fh, 623 "..", 2, &cstate->current_fh); 624 } 625 626 static __be32 627 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 628 struct nfsd4_lookup *lookup) 629 { 630 return nfsd_lookup(rqstp, &cstate->current_fh, 631 lookup->lo_name, lookup->lo_len, 632 &cstate->current_fh); 633 } 634 635 static __be32 636 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 637 struct nfsd4_read *read) 638 { 639 __be32 status; 640 641 /* no need to check permission - this will be done in nfsd_read() */ 642 643 read->rd_filp = NULL; 644 if (read->rd_offset >= OFFSET_MAX) 645 return nfserr_inval; 646 647 nfs4_lock_state(); 648 /* check stateid */ 649 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid, 650 RD_STATE, &read->rd_filp))) { 651 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 652 goto out; 653 } 654 if (read->rd_filp) 655 get_file(read->rd_filp); 656 status = nfs_ok; 657 out: 658 nfs4_unlock_state(); 659 read->rd_rqstp = rqstp; 660 read->rd_fhp = &cstate->current_fh; 661 return status; 662 } 663 664 static __be32 665 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 666 struct nfsd4_readdir *readdir) 667 { 668 u64 cookie = readdir->rd_cookie; 669 static const nfs4_verifier zeroverf; 670 671 /* no need to check permission - this will be done in nfsd_readdir() */ 672 673 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 674 return nfserr_inval; 675 676 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 677 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 678 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 679 680 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) || 681 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 682 return nfserr_bad_cookie; 683 684 readdir->rd_rqstp = rqstp; 685 readdir->rd_fhp = &cstate->current_fh; 686 return nfs_ok; 687 } 688 689 static __be32 690 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 691 struct nfsd4_readlink *readlink) 692 { 693 readlink->rl_rqstp = rqstp; 694 readlink->rl_fhp = &cstate->current_fh; 695 return nfs_ok; 696 } 697 698 static __be32 699 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 700 struct nfsd4_remove *remove) 701 { 702 __be32 status; 703 704 if (locks_in_grace()) 705 return nfserr_grace; 706 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 707 remove->rm_name, remove->rm_namelen); 708 if (status == nfserr_symlink) 709 return nfserr_notdir; 710 if (!status) { 711 fh_unlock(&cstate->current_fh); 712 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 713 } 714 return status; 715 } 716 717 static __be32 718 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 719 struct nfsd4_rename *rename) 720 { 721 __be32 status = nfserr_nofilehandle; 722 723 if (!cstate->save_fh.fh_dentry) 724 return status; 725 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags 726 & NFSEXP_NOSUBTREECHECK)) 727 return nfserr_grace; 728 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 729 rename->rn_snamelen, &cstate->current_fh, 730 rename->rn_tname, rename->rn_tnamelen); 731 732 /* the underlying filesystem returns different error's than required 733 * by NFSv4. both save_fh and current_fh have been verified.. */ 734 if (status == nfserr_isdir) 735 status = nfserr_exist; 736 else if ((status == nfserr_notdir) && 737 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) && 738 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode))) 739 status = nfserr_exist; 740 else if (status == nfserr_symlink) 741 status = nfserr_notdir; 742 743 if (!status) { 744 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 745 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 746 } 747 return status; 748 } 749 750 static __be32 751 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 752 struct nfsd4_secinfo *secinfo) 753 { 754 struct svc_fh resfh; 755 struct svc_export *exp; 756 struct dentry *dentry; 757 __be32 err; 758 759 fh_init(&resfh, NFS4_FHSIZE); 760 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 761 secinfo->si_name, secinfo->si_namelen, 762 &exp, &dentry); 763 if (err) 764 return err; 765 if (dentry->d_inode == NULL) { 766 exp_put(exp); 767 err = nfserr_noent; 768 } else 769 secinfo->si_exp = exp; 770 dput(dentry); 771 return err; 772 } 773 774 static __be32 775 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 776 struct nfsd4_setattr *setattr) 777 { 778 __be32 status = nfs_ok; 779 780 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 781 nfs4_lock_state(); 782 status = nfs4_preprocess_stateid_op(cstate, 783 &setattr->sa_stateid, WR_STATE, NULL); 784 nfs4_unlock_state(); 785 if (status) { 786 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 787 return status; 788 } 789 } 790 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt); 791 if (status) 792 return status; 793 status = nfs_ok; 794 795 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 796 nfsd_attrmask); 797 if (status) 798 goto out; 799 800 if (setattr->sa_acl != NULL) 801 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 802 setattr->sa_acl); 803 if (status) 804 goto out; 805 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 806 0, (time_t)0); 807 out: 808 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt); 809 return status; 810 } 811 812 static __be32 813 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 814 struct nfsd4_write *write) 815 { 816 stateid_t *stateid = &write->wr_stateid; 817 struct file *filp = NULL; 818 u32 *p; 819 __be32 status = nfs_ok; 820 unsigned long cnt; 821 822 /* no need to check permission - this will be done in nfsd_write() */ 823 824 if (write->wr_offset >= OFFSET_MAX) 825 return nfserr_inval; 826 827 nfs4_lock_state(); 828 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp); 829 if (filp) 830 get_file(filp); 831 nfs4_unlock_state(); 832 833 if (status) { 834 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 835 return status; 836 } 837 838 cnt = write->wr_buflen; 839 write->wr_how_written = write->wr_stable_how; 840 p = (u32 *)write->wr_verifier.data; 841 *p++ = nfssvc_boot.tv_sec; 842 *p++ = nfssvc_boot.tv_usec; 843 844 status = nfsd_write(rqstp, &cstate->current_fh, filp, 845 write->wr_offset, rqstp->rq_vec, write->wr_vlen, 846 &cnt, &write->wr_how_written); 847 if (filp) 848 fput(filp); 849 850 write->wr_bytes_written = cnt; 851 852 if (status == nfserr_symlink) 853 status = nfserr_inval; 854 return status; 855 } 856 857 /* This routine never returns NFS_OK! If there are no other errors, it 858 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 859 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 860 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 861 */ 862 static __be32 863 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 864 struct nfsd4_verify *verify) 865 { 866 __be32 *buf, *p; 867 int count; 868 __be32 status; 869 870 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 871 if (status) 872 return status; 873 874 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 875 if (status) 876 return status; 877 878 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 879 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 880 return nfserr_inval; 881 if (verify->ve_attrlen & 3) 882 return nfserr_inval; 883 884 /* count in words: 885 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 886 */ 887 count = 4 + (verify->ve_attrlen >> 2); 888 buf = kmalloc(count << 2, GFP_KERNEL); 889 if (!buf) 890 return nfserr_resource; 891 892 status = nfsd4_encode_fattr(&cstate->current_fh, 893 cstate->current_fh.fh_export, 894 cstate->current_fh.fh_dentry, buf, 895 &count, verify->ve_bmval, 896 rqstp, 0); 897 898 /* this means that nfsd4_encode_fattr() ran out of space */ 899 if (status == nfserr_resource && count == 0) 900 status = nfserr_not_same; 901 if (status) 902 goto out_kfree; 903 904 /* skip bitmap */ 905 p = buf + 1 + ntohl(buf[0]); 906 status = nfserr_not_same; 907 if (ntohl(*p++) != verify->ve_attrlen) 908 goto out_kfree; 909 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 910 status = nfserr_same; 911 912 out_kfree: 913 kfree(buf); 914 return status; 915 } 916 917 static __be32 918 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 919 struct nfsd4_verify *verify) 920 { 921 __be32 status; 922 923 status = _nfsd4_verify(rqstp, cstate, verify); 924 return status == nfserr_not_same ? nfs_ok : status; 925 } 926 927 static __be32 928 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 929 struct nfsd4_verify *verify) 930 { 931 __be32 status; 932 933 status = _nfsd4_verify(rqstp, cstate, verify); 934 return status == nfserr_same ? nfs_ok : status; 935 } 936 937 /* 938 * NULL call. 939 */ 940 static __be32 941 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 942 { 943 return nfs_ok; 944 } 945 946 static inline void nfsd4_increment_op_stats(u32 opnum) 947 { 948 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 949 nfsdstats.nfs4_opcount[opnum]++; 950 } 951 952 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 953 void *); 954 enum nfsd4_op_flags { 955 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 956 ALLOWED_ON_ABSENT_FS = 2 << 0, /* ops processed on absent fs */ 957 ALLOWED_AS_FIRST_OP = 3 << 0, /* ops reqired first in compound */ 958 }; 959 960 struct nfsd4_operation { 961 nfsd4op_func op_func; 962 u32 op_flags; 963 char *op_name; 964 }; 965 966 static struct nfsd4_operation nfsd4_ops[]; 967 968 static const char *nfsd4_op_name(unsigned opnum); 969 970 /* 971 * Enforce NFSv4.1 COMPOUND ordering rules. 972 * 973 * TODO: 974 * - enforce NFS4ERR_NOT_ONLY_OP, 975 * - DESTROY_SESSION MUST be the final operation in the COMPOUND request. 976 */ 977 static bool nfs41_op_ordering_ok(struct nfsd4_compoundargs *args) 978 { 979 if (args->minorversion && args->opcnt > 0) { 980 struct nfsd4_op *op = &args->ops[0]; 981 return (op->status == nfserr_op_illegal) || 982 (nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP); 983 } 984 return true; 985 } 986 987 /* 988 * COMPOUND call. 989 */ 990 static __be32 991 nfsd4_proc_compound(struct svc_rqst *rqstp, 992 struct nfsd4_compoundargs *args, 993 struct nfsd4_compoundres *resp) 994 { 995 struct nfsd4_op *op; 996 struct nfsd4_operation *opdesc; 997 struct nfsd4_compound_state *cstate = &resp->cstate; 998 int slack_bytes; 999 __be32 status; 1000 1001 resp->xbuf = &rqstp->rq_res; 1002 resp->p = rqstp->rq_res.head[0].iov_base + 1003 rqstp->rq_res.head[0].iov_len; 1004 resp->tagp = resp->p; 1005 /* reserve space for: taglen, tag, and opcnt */ 1006 resp->p += 2 + XDR_QUADLEN(args->taglen); 1007 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; 1008 resp->taglen = args->taglen; 1009 resp->tag = args->tag; 1010 resp->opcnt = 0; 1011 resp->rqstp = rqstp; 1012 resp->cstate.minorversion = args->minorversion; 1013 resp->cstate.replay_owner = NULL; 1014 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); 1015 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); 1016 /* Use the deferral mechanism only for NFSv4.0 compounds */ 1017 rqstp->rq_usedeferral = (args->minorversion == 0); 1018 1019 /* 1020 * According to RFC3010, this takes precedence over all other errors. 1021 */ 1022 status = nfserr_minor_vers_mismatch; 1023 if (args->minorversion > nfsd_supported_minorversion) 1024 goto out; 1025 1026 if (!nfs41_op_ordering_ok(args)) { 1027 op = &args->ops[0]; 1028 op->status = nfserr_sequence_pos; 1029 goto encode_op; 1030 } 1031 1032 status = nfs_ok; 1033 while (!status && resp->opcnt < args->opcnt) { 1034 op = &args->ops[resp->opcnt++]; 1035 1036 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1037 resp->opcnt, args->opcnt, op->opnum, 1038 nfsd4_op_name(op->opnum)); 1039 /* 1040 * The XDR decode routines may have pre-set op->status; 1041 * for example, if there is a miscellaneous XDR error 1042 * it will be set to nfserr_bad_xdr. 1043 */ 1044 if (op->status) 1045 goto encode_op; 1046 1047 /* We must be able to encode a successful response to 1048 * this operation, with enough room left over to encode a 1049 * failed response to the next operation. If we don't 1050 * have enough room, fail with ERR_RESOURCE. 1051 */ 1052 slack_bytes = (char *)resp->end - (char *)resp->p; 1053 if (slack_bytes < COMPOUND_SLACK_SPACE 1054 + COMPOUND_ERR_SLACK_SPACE) { 1055 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); 1056 op->status = nfserr_resource; 1057 goto encode_op; 1058 } 1059 1060 opdesc = &nfsd4_ops[op->opnum]; 1061 1062 if (!cstate->current_fh.fh_dentry) { 1063 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1064 op->status = nfserr_nofilehandle; 1065 goto encode_op; 1066 } 1067 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && 1068 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1069 op->status = nfserr_moved; 1070 goto encode_op; 1071 } 1072 1073 if (opdesc->op_func) 1074 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1075 else 1076 BUG_ON(op->status == nfs_ok); 1077 1078 encode_op: 1079 /* Only from SEQUENCE */ 1080 if (resp->cstate.status == nfserr_replay_cache) { 1081 dprintk("%s NFS4.1 replay from cache\n", __func__); 1082 status = op->status; 1083 goto out; 1084 } 1085 if (op->status == nfserr_replay_me) { 1086 op->replay = &cstate->replay_owner->so_replay; 1087 nfsd4_encode_replay(resp, op); 1088 status = op->status = op->replay->rp_status; 1089 } else { 1090 nfsd4_encode_operation(resp, op); 1091 status = op->status; 1092 } 1093 1094 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1095 args->ops, args->opcnt, resp->opcnt, op->opnum, 1096 be32_to_cpu(status)); 1097 1098 if (cstate->replay_owner) { 1099 nfs4_put_stateowner(cstate->replay_owner); 1100 cstate->replay_owner = NULL; 1101 } 1102 /* XXX Ugh, we need to get rid of this kind of special case: */ 1103 if (op->opnum == OP_READ && op->u.read.rd_filp) 1104 fput(op->u.read.rd_filp); 1105 1106 nfsd4_increment_op_stats(op->opnum); 1107 } 1108 if (!rqstp->rq_usedeferral && status == nfserr_dropit) { 1109 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__); 1110 status = nfserr_jukebox; 1111 } 1112 1113 resp->cstate.status = status; 1114 fh_put(&resp->cstate.current_fh); 1115 fh_put(&resp->cstate.save_fh); 1116 BUG_ON(resp->cstate.replay_owner); 1117 out: 1118 nfsd4_release_compoundargs(args); 1119 /* Reset deferral mechanism for RPC deferrals */ 1120 rqstp->rq_usedeferral = 1; 1121 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1122 return status; 1123 } 1124 1125 static struct nfsd4_operation nfsd4_ops[] = { 1126 [OP_ACCESS] = { 1127 .op_func = (nfsd4op_func)nfsd4_access, 1128 .op_name = "OP_ACCESS", 1129 }, 1130 [OP_CLOSE] = { 1131 .op_func = (nfsd4op_func)nfsd4_close, 1132 .op_name = "OP_CLOSE", 1133 }, 1134 [OP_COMMIT] = { 1135 .op_func = (nfsd4op_func)nfsd4_commit, 1136 .op_name = "OP_COMMIT", 1137 }, 1138 [OP_CREATE] = { 1139 .op_func = (nfsd4op_func)nfsd4_create, 1140 .op_name = "OP_CREATE", 1141 }, 1142 [OP_DELEGRETURN] = { 1143 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1144 .op_name = "OP_DELEGRETURN", 1145 }, 1146 [OP_GETATTR] = { 1147 .op_func = (nfsd4op_func)nfsd4_getattr, 1148 .op_flags = ALLOWED_ON_ABSENT_FS, 1149 .op_name = "OP_GETATTR", 1150 }, 1151 [OP_GETFH] = { 1152 .op_func = (nfsd4op_func)nfsd4_getfh, 1153 .op_name = "OP_GETFH", 1154 }, 1155 [OP_LINK] = { 1156 .op_func = (nfsd4op_func)nfsd4_link, 1157 .op_name = "OP_LINK", 1158 }, 1159 [OP_LOCK] = { 1160 .op_func = (nfsd4op_func)nfsd4_lock, 1161 .op_name = "OP_LOCK", 1162 }, 1163 [OP_LOCKT] = { 1164 .op_func = (nfsd4op_func)nfsd4_lockt, 1165 .op_name = "OP_LOCKT", 1166 }, 1167 [OP_LOCKU] = { 1168 .op_func = (nfsd4op_func)nfsd4_locku, 1169 .op_name = "OP_LOCKU", 1170 }, 1171 [OP_LOOKUP] = { 1172 .op_func = (nfsd4op_func)nfsd4_lookup, 1173 .op_name = "OP_LOOKUP", 1174 }, 1175 [OP_LOOKUPP] = { 1176 .op_func = (nfsd4op_func)nfsd4_lookupp, 1177 .op_name = "OP_LOOKUPP", 1178 }, 1179 [OP_NVERIFY] = { 1180 .op_func = (nfsd4op_func)nfsd4_nverify, 1181 .op_name = "OP_NVERIFY", 1182 }, 1183 [OP_OPEN] = { 1184 .op_func = (nfsd4op_func)nfsd4_open, 1185 .op_name = "OP_OPEN", 1186 }, 1187 [OP_OPEN_CONFIRM] = { 1188 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1189 .op_name = "OP_OPEN_CONFIRM", 1190 }, 1191 [OP_OPEN_DOWNGRADE] = { 1192 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1193 .op_name = "OP_OPEN_DOWNGRADE", 1194 }, 1195 [OP_PUTFH] = { 1196 .op_func = (nfsd4op_func)nfsd4_putfh, 1197 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1198 .op_name = "OP_PUTFH", 1199 }, 1200 [OP_PUTPUBFH] = { 1201 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1202 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1203 .op_name = "OP_PUTPUBFH", 1204 }, 1205 [OP_PUTROOTFH] = { 1206 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1207 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1208 .op_name = "OP_PUTROOTFH", 1209 }, 1210 [OP_READ] = { 1211 .op_func = (nfsd4op_func)nfsd4_read, 1212 .op_name = "OP_READ", 1213 }, 1214 [OP_READDIR] = { 1215 .op_func = (nfsd4op_func)nfsd4_readdir, 1216 .op_name = "OP_READDIR", 1217 }, 1218 [OP_READLINK] = { 1219 .op_func = (nfsd4op_func)nfsd4_readlink, 1220 .op_name = "OP_READLINK", 1221 }, 1222 [OP_REMOVE] = { 1223 .op_func = (nfsd4op_func)nfsd4_remove, 1224 .op_name = "OP_REMOVE", 1225 }, 1226 [OP_RENAME] = { 1227 .op_name = "OP_RENAME", 1228 .op_func = (nfsd4op_func)nfsd4_rename, 1229 }, 1230 [OP_RENEW] = { 1231 .op_func = (nfsd4op_func)nfsd4_renew, 1232 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1233 .op_name = "OP_RENEW", 1234 }, 1235 [OP_RESTOREFH] = { 1236 .op_func = (nfsd4op_func)nfsd4_restorefh, 1237 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1238 .op_name = "OP_RESTOREFH", 1239 }, 1240 [OP_SAVEFH] = { 1241 .op_func = (nfsd4op_func)nfsd4_savefh, 1242 .op_name = "OP_SAVEFH", 1243 }, 1244 [OP_SECINFO] = { 1245 .op_func = (nfsd4op_func)nfsd4_secinfo, 1246 .op_name = "OP_SECINFO", 1247 }, 1248 [OP_SETATTR] = { 1249 .op_func = (nfsd4op_func)nfsd4_setattr, 1250 .op_name = "OP_SETATTR", 1251 }, 1252 [OP_SETCLIENTID] = { 1253 .op_func = (nfsd4op_func)nfsd4_setclientid, 1254 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1255 .op_name = "OP_SETCLIENTID", 1256 }, 1257 [OP_SETCLIENTID_CONFIRM] = { 1258 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1259 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1260 .op_name = "OP_SETCLIENTID_CONFIRM", 1261 }, 1262 [OP_VERIFY] = { 1263 .op_func = (nfsd4op_func)nfsd4_verify, 1264 .op_name = "OP_VERIFY", 1265 }, 1266 [OP_WRITE] = { 1267 .op_func = (nfsd4op_func)nfsd4_write, 1268 .op_name = "OP_WRITE", 1269 }, 1270 [OP_RELEASE_LOCKOWNER] = { 1271 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1272 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1273 .op_name = "OP_RELEASE_LOCKOWNER", 1274 }, 1275 1276 /* NFSv4.1 operations */ 1277 [OP_EXCHANGE_ID] = { 1278 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1279 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1280 .op_name = "OP_EXCHANGE_ID", 1281 }, 1282 [OP_CREATE_SESSION] = { 1283 .op_func = (nfsd4op_func)nfsd4_create_session, 1284 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1285 .op_name = "OP_CREATE_SESSION", 1286 }, 1287 [OP_DESTROY_SESSION] = { 1288 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1289 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1290 .op_name = "OP_DESTROY_SESSION", 1291 }, 1292 [OP_SEQUENCE] = { 1293 .op_func = (nfsd4op_func)nfsd4_sequence, 1294 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1295 .op_name = "OP_SEQUENCE", 1296 }, 1297 }; 1298 1299 static const char *nfsd4_op_name(unsigned opnum) 1300 { 1301 if (opnum < ARRAY_SIZE(nfsd4_ops)) 1302 return nfsd4_ops[opnum].op_name; 1303 return "unknown_operation"; 1304 } 1305 1306 #define nfsd4_voidres nfsd4_voidargs 1307 struct nfsd4_voidargs { int dummy; }; 1308 1309 /* 1310 * TODO: At the present time, the NFSv4 server does not do XID caching 1311 * of requests. Implementing XID caching would not be a serious problem, 1312 * although it would require a mild change in interfaces since one 1313 * doesn't know whether an NFSv4 request is idempotent until after the 1314 * XDR decode. However, XID caching totally confuses pynfs (Peter 1315 * Astrand's regression testsuite for NFSv4 servers), which reuses 1316 * XID's liberally, so I've left it unimplemented until pynfs generates 1317 * better XID's. 1318 */ 1319 static struct svc_procedure nfsd_procedures4[2] = { 1320 [NFSPROC4_NULL] = { 1321 .pc_func = (svc_procfunc) nfsd4_proc_null, 1322 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 1323 .pc_argsize = sizeof(struct nfsd4_voidargs), 1324 .pc_ressize = sizeof(struct nfsd4_voidres), 1325 .pc_cachetype = RC_NOCACHE, 1326 .pc_xdrressize = 1, 1327 }, 1328 [NFSPROC4_COMPOUND] = { 1329 .pc_func = (svc_procfunc) nfsd4_proc_compound, 1330 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 1331 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 1332 .pc_argsize = sizeof(struct nfsd4_compoundargs), 1333 .pc_ressize = sizeof(struct nfsd4_compoundres), 1334 .pc_cachetype = RC_NOCACHE, 1335 .pc_xdrressize = NFSD_BUFSIZE/4, 1336 }, 1337 }; 1338 1339 struct svc_version nfsd_version4 = { 1340 .vs_vers = 4, 1341 .vs_nproc = 2, 1342 .vs_proc = nfsd_procedures4, 1343 .vs_dispatch = nfsd_dispatch, 1344 .vs_xdrsize = NFS4_SVC_XDRSIZE, 1345 }; 1346 1347 /* 1348 * Local variables: 1349 * c-basic-offset: 8 1350 * End: 1351 */ 1352