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 44 static u32 nfsd_attrmask[] = { 45 NFSD_WRITEABLE_ATTRS_WORD0, 46 NFSD_WRITEABLE_ATTRS_WORD1, 47 NFSD_WRITEABLE_ATTRS_WORD2 48 }; 49 50 static u32 nfsd41_ex_attrmask[] = { 51 NFSD_SUPPATTR_EXCLCREAT_WORD0, 52 NFSD_SUPPATTR_EXCLCREAT_WORD1, 53 NFSD_SUPPATTR_EXCLCREAT_WORD2 54 }; 55 56 static __be32 57 check_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 92 static __be32 93 nfsd4_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 } 110 111 static int 112 is_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 */ 124 static void 125 do_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 } 139 140 static inline void 141 fh_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 } 149 150 static __be32 151 do_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 } 170 171 static __be32 172 do_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 /* FIXME: check session persistence and pnfs flags. 183 * The nfsv4.1 spec requires the following semantics: 184 * 185 * Persistent | pNFS | Server REQUIRED | Client Allowed 186 * Reply Cache | server | | 187 * -------------+--------+-----------------+-------------------- 188 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 189 * | | | (SHOULD) 190 * | | and EXCLUSIVE4 | or EXCLUSIVE4 191 * | | | (SHOULD NOT) 192 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 193 * yes | no | GUARDED4 | GUARDED4 194 * yes | yes | GUARDED4 | GUARDED4 195 */ 196 197 /* 198 * Note: create modes (UNCHECKED,GUARDED...) are the same 199 * in NFSv4 as in v3. 200 */ 201 status = nfsd_create_v3(rqstp, current_fh, open->op_fname.data, 202 open->op_fname.len, &open->op_iattr, 203 &resfh, open->op_createmode, 204 (u32 *)open->op_verf.data, 205 &open->op_truncate, &created); 206 207 /* 208 * Following rfc 3530 14.2.16, use the returned bitmask 209 * to indicate which attributes we used to store the 210 * verifier: 211 */ 212 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) 213 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | 214 FATTR4_WORD1_TIME_MODIFY); 215 } else { 216 status = nfsd_lookup(rqstp, current_fh, 217 open->op_fname.data, open->op_fname.len, &resfh); 218 fh_unlock(current_fh); 219 } 220 if (status) 221 goto out; 222 223 if (is_create_with_attrs(open) && open->op_acl != NULL) 224 do_set_nfs4_acl(rqstp, &resfh, open->op_acl, open->op_bmval); 225 226 set_change_info(&open->op_cinfo, current_fh); 227 fh_dup2(current_fh, &resfh); 228 229 /* set reply cache */ 230 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, 231 &resfh.fh_handle); 232 if (!created) 233 status = do_open_permission(rqstp, current_fh, open, 234 NFSD_MAY_NOP); 235 236 out: 237 fh_put(&resfh); 238 return status; 239 } 240 241 static __be32 242 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 243 { 244 __be32 status; 245 246 /* Only reclaims from previously confirmed clients are valid */ 247 if ((status = nfs4_check_open_reclaim(&open->op_clientid))) 248 return status; 249 250 /* We don't know the target directory, and therefore can not 251 * set the change info 252 */ 253 254 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 255 256 /* set replay cache */ 257 fh_copy_shallow(&open->op_stateowner->so_replay.rp_openfh, 258 ¤t_fh->fh_handle); 259 260 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 261 (open->op_iattr.ia_size == 0); 262 263 status = do_open_permission(rqstp, current_fh, open, 264 NFSD_MAY_OWNER_OVERRIDE); 265 266 return status; 267 } 268 269 static void 270 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 271 { 272 struct nfsd4_sessionid *sid = 273 (struct nfsd4_sessionid *)session->se_sessionid.data; 274 275 clid->cl_boot = sid->clientid.cl_boot; 276 clid->cl_id = sid->clientid.cl_id; 277 } 278 279 static __be32 280 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 281 struct nfsd4_open *open) 282 { 283 __be32 status; 284 struct nfsd4_compoundres *resp; 285 286 dprintk("NFSD: nfsd4_open filename %.*s op_stateowner %p\n", 287 (int)open->op_fname.len, open->op_fname.data, 288 open->op_stateowner); 289 290 /* This check required by spec. */ 291 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 292 return nfserr_inval; 293 294 if (nfsd4_has_session(cstate)) 295 copy_clientid(&open->op_clientid, cstate->session); 296 297 nfs4_lock_state(); 298 299 /* check seqid for replay. set nfs4_owner */ 300 resp = rqstp->rq_resp; 301 status = nfsd4_process_open1(&resp->cstate, open); 302 if (status == nfserr_replay_me) { 303 struct nfs4_replay *rp = &open->op_stateowner->so_replay; 304 fh_put(&cstate->current_fh); 305 fh_copy_shallow(&cstate->current_fh.fh_handle, 306 &rp->rp_openfh); 307 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 308 if (status) 309 dprintk("nfsd4_open: replay failed" 310 " restoring previous filehandle\n"); 311 else 312 status = nfserr_replay_me; 313 } 314 if (status) 315 goto out; 316 317 status = nfsd4_check_open_attributes(rqstp, cstate, open); 318 if (status) 319 goto out; 320 321 /* Openowner is now set, so sequence id will get bumped. Now we need 322 * these checks before we do any creates: */ 323 status = nfserr_grace; 324 if (locks_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 325 goto out; 326 status = nfserr_no_grace; 327 if (!locks_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 328 goto out; 329 330 switch (open->op_claim_type) { 331 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 332 case NFS4_OPEN_CLAIM_NULL: 333 /* 334 * (1) set CURRENT_FH to the file being opened, 335 * creating it if necessary, (2) set open->op_cinfo, 336 * (3) set open->op_truncate if the file is to be 337 * truncated after opening, (4) do permission checking. 338 */ 339 status = do_open_lookup(rqstp, &cstate->current_fh, 340 open); 341 if (status) 342 goto out; 343 break; 344 case NFS4_OPEN_CLAIM_PREVIOUS: 345 open->op_stateowner->so_confirmed = 1; 346 /* 347 * The CURRENT_FH is already set to the file being 348 * opened. (1) set open->op_cinfo, (2) set 349 * open->op_truncate if the file is to be truncated 350 * after opening, (3) do permission checking. 351 */ 352 status = do_open_fhandle(rqstp, &cstate->current_fh, 353 open); 354 if (status) 355 goto out; 356 break; 357 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 358 open->op_stateowner->so_confirmed = 1; 359 dprintk("NFSD: unsupported OPEN claim type %d\n", 360 open->op_claim_type); 361 status = nfserr_notsupp; 362 goto out; 363 default: 364 dprintk("NFSD: Invalid OPEN claim type %d\n", 365 open->op_claim_type); 366 status = nfserr_inval; 367 goto out; 368 } 369 /* 370 * nfsd4_process_open2() does the actual opening of the file. If 371 * successful, it (1) truncates the file if open->op_truncate was 372 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 373 */ 374 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open); 375 out: 376 if (open->op_stateowner) { 377 nfs4_get_stateowner(open->op_stateowner); 378 cstate->replay_owner = open->op_stateowner; 379 } 380 nfs4_unlock_state(); 381 return status; 382 } 383 384 /* 385 * filehandle-manipulating ops. 386 */ 387 static __be32 388 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 389 struct svc_fh **getfh) 390 { 391 if (!cstate->current_fh.fh_dentry) 392 return nfserr_nofilehandle; 393 394 *getfh = &cstate->current_fh; 395 return nfs_ok; 396 } 397 398 static __be32 399 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 400 struct nfsd4_putfh *putfh) 401 { 402 fh_put(&cstate->current_fh); 403 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 404 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 405 putfh->pf_fhlen); 406 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 407 } 408 409 static __be32 410 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 411 void *arg) 412 { 413 __be32 status; 414 415 fh_put(&cstate->current_fh); 416 status = exp_pseudoroot(rqstp, &cstate->current_fh); 417 return status; 418 } 419 420 static __be32 421 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 422 void *arg) 423 { 424 if (!cstate->save_fh.fh_dentry) 425 return nfserr_restorefh; 426 427 fh_dup2(&cstate->current_fh, &cstate->save_fh); 428 return nfs_ok; 429 } 430 431 static __be32 432 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 433 void *arg) 434 { 435 if (!cstate->current_fh.fh_dentry) 436 return nfserr_nofilehandle; 437 438 fh_dup2(&cstate->save_fh, &cstate->current_fh); 439 return nfs_ok; 440 } 441 442 /* 443 * misc nfsv4 ops 444 */ 445 static __be32 446 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 447 struct nfsd4_access *access) 448 { 449 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 450 return nfserr_inval; 451 452 access->ac_resp_access = access->ac_req_access; 453 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 454 &access->ac_supported); 455 } 456 457 static __be32 458 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 459 struct nfsd4_commit *commit) 460 { 461 __be32 status; 462 463 u32 *p = (u32 *)commit->co_verf.data; 464 *p++ = nfssvc_boot.tv_sec; 465 *p++ = nfssvc_boot.tv_usec; 466 467 status = nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 468 commit->co_count); 469 if (status == nfserr_symlink) 470 status = nfserr_inval; 471 return status; 472 } 473 474 static __be32 475 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 476 struct nfsd4_create *create) 477 { 478 struct svc_fh resfh; 479 __be32 status; 480 dev_t rdev; 481 482 fh_init(&resfh, NFS4_FHSIZE); 483 484 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 485 NFSD_MAY_CREATE); 486 if (status == nfserr_symlink) 487 status = nfserr_notdir; 488 if (status) 489 return status; 490 491 status = check_attr_support(rqstp, cstate, create->cr_bmval, 492 nfsd_attrmask); 493 if (status) 494 return status; 495 496 switch (create->cr_type) { 497 case NF4LNK: 498 /* ugh! we have to null-terminate the linktext, or 499 * vfs_symlink() will choke. it is always safe to 500 * null-terminate by brute force, since at worst we 501 * will overwrite the first byte of the create namelen 502 * in the XDR buffer, which has already been extracted 503 * during XDR decode. 504 */ 505 create->cr_linkname[create->cr_linklen] = 0; 506 507 status = nfsd_symlink(rqstp, &cstate->current_fh, 508 create->cr_name, create->cr_namelen, 509 create->cr_linkname, create->cr_linklen, 510 &resfh, &create->cr_iattr); 511 break; 512 513 case NF4BLK: 514 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 515 if (MAJOR(rdev) != create->cr_specdata1 || 516 MINOR(rdev) != create->cr_specdata2) 517 return nfserr_inval; 518 status = nfsd_create(rqstp, &cstate->current_fh, 519 create->cr_name, create->cr_namelen, 520 &create->cr_iattr, S_IFBLK, rdev, &resfh); 521 break; 522 523 case NF4CHR: 524 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 525 if (MAJOR(rdev) != create->cr_specdata1 || 526 MINOR(rdev) != create->cr_specdata2) 527 return nfserr_inval; 528 status = nfsd_create(rqstp, &cstate->current_fh, 529 create->cr_name, create->cr_namelen, 530 &create->cr_iattr,S_IFCHR, rdev, &resfh); 531 break; 532 533 case NF4SOCK: 534 status = nfsd_create(rqstp, &cstate->current_fh, 535 create->cr_name, create->cr_namelen, 536 &create->cr_iattr, S_IFSOCK, 0, &resfh); 537 break; 538 539 case NF4FIFO: 540 status = nfsd_create(rqstp, &cstate->current_fh, 541 create->cr_name, create->cr_namelen, 542 &create->cr_iattr, S_IFIFO, 0, &resfh); 543 break; 544 545 case NF4DIR: 546 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 547 status = nfsd_create(rqstp, &cstate->current_fh, 548 create->cr_name, create->cr_namelen, 549 &create->cr_iattr, S_IFDIR, 0, &resfh); 550 break; 551 552 default: 553 status = nfserr_badtype; 554 } 555 556 if (status) 557 goto out; 558 559 if (create->cr_acl != NULL) 560 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 561 create->cr_bmval); 562 563 fh_unlock(&cstate->current_fh); 564 set_change_info(&create->cr_cinfo, &cstate->current_fh); 565 fh_dup2(&cstate->current_fh, &resfh); 566 out: 567 fh_put(&resfh); 568 return status; 569 } 570 571 static __be32 572 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 573 struct nfsd4_getattr *getattr) 574 { 575 __be32 status; 576 577 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 578 if (status) 579 return status; 580 581 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 582 return nfserr_inval; 583 584 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 585 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 586 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 587 588 getattr->ga_fhp = &cstate->current_fh; 589 return nfs_ok; 590 } 591 592 static __be32 593 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 594 struct nfsd4_link *link) 595 { 596 __be32 status = nfserr_nofilehandle; 597 598 if (!cstate->save_fh.fh_dentry) 599 return status; 600 status = nfsd_link(rqstp, &cstate->current_fh, 601 link->li_name, link->li_namelen, &cstate->save_fh); 602 if (!status) 603 set_change_info(&link->li_cinfo, &cstate->current_fh); 604 return status; 605 } 606 607 static __be32 608 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 609 void *arg) 610 { 611 struct svc_fh tmp_fh; 612 __be32 ret; 613 614 fh_init(&tmp_fh, NFS4_FHSIZE); 615 ret = exp_pseudoroot(rqstp, &tmp_fh); 616 if (ret) 617 return ret; 618 if (tmp_fh.fh_dentry == cstate->current_fh.fh_dentry) { 619 fh_put(&tmp_fh); 620 return nfserr_noent; 621 } 622 fh_put(&tmp_fh); 623 return nfsd_lookup(rqstp, &cstate->current_fh, 624 "..", 2, &cstate->current_fh); 625 } 626 627 static __be32 628 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 629 struct nfsd4_lookup *lookup) 630 { 631 return nfsd_lookup(rqstp, &cstate->current_fh, 632 lookup->lo_name, lookup->lo_len, 633 &cstate->current_fh); 634 } 635 636 static __be32 637 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 638 struct nfsd4_read *read) 639 { 640 __be32 status; 641 642 /* no need to check permission - this will be done in nfsd_read() */ 643 644 read->rd_filp = NULL; 645 if (read->rd_offset >= OFFSET_MAX) 646 return nfserr_inval; 647 648 nfs4_lock_state(); 649 /* check stateid */ 650 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid, 651 RD_STATE, &read->rd_filp))) { 652 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 653 goto out; 654 } 655 if (read->rd_filp) 656 get_file(read->rd_filp); 657 status = nfs_ok; 658 out: 659 nfs4_unlock_state(); 660 read->rd_rqstp = rqstp; 661 read->rd_fhp = &cstate->current_fh; 662 return status; 663 } 664 665 static __be32 666 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 667 struct nfsd4_readdir *readdir) 668 { 669 u64 cookie = readdir->rd_cookie; 670 static const nfs4_verifier zeroverf; 671 672 /* no need to check permission - this will be done in nfsd_readdir() */ 673 674 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 675 return nfserr_inval; 676 677 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 678 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 679 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 680 681 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) || 682 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 683 return nfserr_bad_cookie; 684 685 readdir->rd_rqstp = rqstp; 686 readdir->rd_fhp = &cstate->current_fh; 687 return nfs_ok; 688 } 689 690 static __be32 691 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 692 struct nfsd4_readlink *readlink) 693 { 694 readlink->rl_rqstp = rqstp; 695 readlink->rl_fhp = &cstate->current_fh; 696 return nfs_ok; 697 } 698 699 static __be32 700 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 701 struct nfsd4_remove *remove) 702 { 703 __be32 status; 704 705 if (locks_in_grace()) 706 return nfserr_grace; 707 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 708 remove->rm_name, remove->rm_namelen); 709 if (status == nfserr_symlink) 710 return nfserr_notdir; 711 if (!status) { 712 fh_unlock(&cstate->current_fh); 713 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 714 } 715 return status; 716 } 717 718 static __be32 719 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 720 struct nfsd4_rename *rename) 721 { 722 __be32 status = nfserr_nofilehandle; 723 724 if (!cstate->save_fh.fh_dentry) 725 return status; 726 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags 727 & NFSEXP_NOSUBTREECHECK)) 728 return nfserr_grace; 729 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 730 rename->rn_snamelen, &cstate->current_fh, 731 rename->rn_tname, rename->rn_tnamelen); 732 733 /* the underlying filesystem returns different error's than required 734 * by NFSv4. both save_fh and current_fh have been verified.. */ 735 if (status == nfserr_isdir) 736 status = nfserr_exist; 737 else if ((status == nfserr_notdir) && 738 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) && 739 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode))) 740 status = nfserr_exist; 741 else if (status == nfserr_symlink) 742 status = nfserr_notdir; 743 744 if (!status) { 745 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 746 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 747 } 748 return status; 749 } 750 751 static __be32 752 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 753 struct nfsd4_secinfo *secinfo) 754 { 755 struct svc_fh resfh; 756 struct svc_export *exp; 757 struct dentry *dentry; 758 __be32 err; 759 760 fh_init(&resfh, NFS4_FHSIZE); 761 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 762 secinfo->si_name, secinfo->si_namelen, 763 &exp, &dentry); 764 if (err) 765 return err; 766 if (dentry->d_inode == NULL) { 767 exp_put(exp); 768 err = nfserr_noent; 769 } else 770 secinfo->si_exp = exp; 771 dput(dentry); 772 return err; 773 } 774 775 static __be32 776 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 777 struct nfsd4_setattr *setattr) 778 { 779 __be32 status = nfs_ok; 780 781 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 782 nfs4_lock_state(); 783 status = nfs4_preprocess_stateid_op(cstate, 784 &setattr->sa_stateid, WR_STATE, NULL); 785 nfs4_unlock_state(); 786 if (status) { 787 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 788 return status; 789 } 790 } 791 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt); 792 if (status) 793 return status; 794 status = nfs_ok; 795 796 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 797 nfsd_attrmask); 798 if (status) 799 goto out; 800 801 if (setattr->sa_acl != NULL) 802 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 803 setattr->sa_acl); 804 if (status) 805 goto out; 806 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 807 0, (time_t)0); 808 out: 809 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt); 810 return status; 811 } 812 813 static __be32 814 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 815 struct nfsd4_write *write) 816 { 817 stateid_t *stateid = &write->wr_stateid; 818 struct file *filp = NULL; 819 u32 *p; 820 __be32 status = nfs_ok; 821 unsigned long cnt; 822 823 /* no need to check permission - this will be done in nfsd_write() */ 824 825 if (write->wr_offset >= OFFSET_MAX) 826 return nfserr_inval; 827 828 nfs4_lock_state(); 829 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp); 830 if (filp) 831 get_file(filp); 832 nfs4_unlock_state(); 833 834 if (status) { 835 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 836 return status; 837 } 838 839 cnt = write->wr_buflen; 840 write->wr_how_written = write->wr_stable_how; 841 p = (u32 *)write->wr_verifier.data; 842 *p++ = nfssvc_boot.tv_sec; 843 *p++ = nfssvc_boot.tv_usec; 844 845 status = nfsd_write(rqstp, &cstate->current_fh, filp, 846 write->wr_offset, rqstp->rq_vec, write->wr_vlen, 847 &cnt, &write->wr_how_written); 848 if (filp) 849 fput(filp); 850 851 write->wr_bytes_written = cnt; 852 853 if (status == nfserr_symlink) 854 status = nfserr_inval; 855 return status; 856 } 857 858 /* This routine never returns NFS_OK! If there are no other errors, it 859 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 860 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 861 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 862 */ 863 static __be32 864 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 865 struct nfsd4_verify *verify) 866 { 867 __be32 *buf, *p; 868 int count; 869 __be32 status; 870 871 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 872 if (status) 873 return status; 874 875 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 876 if (status) 877 return status; 878 879 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 880 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 881 return nfserr_inval; 882 if (verify->ve_attrlen & 3) 883 return nfserr_inval; 884 885 /* count in words: 886 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 887 */ 888 count = 4 + (verify->ve_attrlen >> 2); 889 buf = kmalloc(count << 2, GFP_KERNEL); 890 if (!buf) 891 return nfserr_resource; 892 893 status = nfsd4_encode_fattr(&cstate->current_fh, 894 cstate->current_fh.fh_export, 895 cstate->current_fh.fh_dentry, buf, 896 &count, verify->ve_bmval, 897 rqstp, 0); 898 899 /* this means that nfsd4_encode_fattr() ran out of space */ 900 if (status == nfserr_resource && count == 0) 901 status = nfserr_not_same; 902 if (status) 903 goto out_kfree; 904 905 /* skip bitmap */ 906 p = buf + 1 + ntohl(buf[0]); 907 status = nfserr_not_same; 908 if (ntohl(*p++) != verify->ve_attrlen) 909 goto out_kfree; 910 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 911 status = nfserr_same; 912 913 out_kfree: 914 kfree(buf); 915 return status; 916 } 917 918 static __be32 919 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 920 struct nfsd4_verify *verify) 921 { 922 __be32 status; 923 924 status = _nfsd4_verify(rqstp, cstate, verify); 925 return status == nfserr_not_same ? nfs_ok : status; 926 } 927 928 static __be32 929 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 930 struct nfsd4_verify *verify) 931 { 932 __be32 status; 933 934 status = _nfsd4_verify(rqstp, cstate, verify); 935 return status == nfserr_same ? nfs_ok : status; 936 } 937 938 /* 939 * NULL call. 940 */ 941 static __be32 942 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 943 { 944 return nfs_ok; 945 } 946 947 static inline void nfsd4_increment_op_stats(u32 opnum) 948 { 949 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 950 nfsdstats.nfs4_opcount[opnum]++; 951 } 952 953 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 954 void *); 955 enum nfsd4_op_flags { 956 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 957 ALLOWED_ON_ABSENT_FS = 2 << 0, /* ops processed on absent fs */ 958 ALLOWED_AS_FIRST_OP = 3 << 0, /* ops reqired first in compound */ 959 }; 960 961 struct nfsd4_operation { 962 nfsd4op_func op_func; 963 u32 op_flags; 964 char *op_name; 965 }; 966 967 static struct nfsd4_operation nfsd4_ops[]; 968 969 static const char *nfsd4_op_name(unsigned opnum); 970 971 /* 972 * Enforce NFSv4.1 COMPOUND ordering rules: 973 * 974 * Also note, enforced elsewhere: 975 * - SEQUENCE other than as first op results in 976 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 977 * - BIND_CONN_TO_SESSION must be the only op in its compound 978 * (Will be enforced in nfsd4_bind_conn_to_session().) 979 * - DESTROY_SESSION must be the final operation in a compound, if 980 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 981 * (Enforced in nfsd4_destroy_session().) 982 */ 983 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 984 { 985 struct nfsd4_op *op = &args->ops[0]; 986 987 /* These ordering requirements don't apply to NFSv4.0: */ 988 if (args->minorversion == 0) 989 return nfs_ok; 990 /* This is weird, but OK, not our problem: */ 991 if (args->opcnt == 0) 992 return nfs_ok; 993 if (op->status == nfserr_op_illegal) 994 return nfs_ok; 995 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 996 return nfserr_op_not_in_session; 997 if (op->opnum == OP_SEQUENCE) 998 return nfs_ok; 999 if (args->opcnt != 1) 1000 return nfserr_not_only_op; 1001 return nfs_ok; 1002 } 1003 1004 /* 1005 * COMPOUND call. 1006 */ 1007 static __be32 1008 nfsd4_proc_compound(struct svc_rqst *rqstp, 1009 struct nfsd4_compoundargs *args, 1010 struct nfsd4_compoundres *resp) 1011 { 1012 struct nfsd4_op *op; 1013 struct nfsd4_operation *opdesc; 1014 struct nfsd4_compound_state *cstate = &resp->cstate; 1015 int slack_bytes; 1016 __be32 status; 1017 1018 resp->xbuf = &rqstp->rq_res; 1019 resp->p = rqstp->rq_res.head[0].iov_base + 1020 rqstp->rq_res.head[0].iov_len; 1021 resp->tagp = resp->p; 1022 /* reserve space for: taglen, tag, and opcnt */ 1023 resp->p += 2 + XDR_QUADLEN(args->taglen); 1024 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; 1025 resp->taglen = args->taglen; 1026 resp->tag = args->tag; 1027 resp->opcnt = 0; 1028 resp->rqstp = rqstp; 1029 resp->cstate.minorversion = args->minorversion; 1030 resp->cstate.replay_owner = NULL; 1031 resp->cstate.session = NULL; 1032 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); 1033 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); 1034 /* Use the deferral mechanism only for NFSv4.0 compounds */ 1035 rqstp->rq_usedeferral = (args->minorversion == 0); 1036 1037 /* 1038 * According to RFC3010, this takes precedence over all other errors. 1039 */ 1040 status = nfserr_minor_vers_mismatch; 1041 if (args->minorversion > nfsd_supported_minorversion) 1042 goto out; 1043 1044 status = nfs41_check_op_ordering(args); 1045 if (status) { 1046 op = &args->ops[0]; 1047 op->status = status; 1048 goto encode_op; 1049 } 1050 1051 while (!status && resp->opcnt < args->opcnt) { 1052 op = &args->ops[resp->opcnt++]; 1053 1054 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1055 resp->opcnt, args->opcnt, op->opnum, 1056 nfsd4_op_name(op->opnum)); 1057 /* 1058 * The XDR decode routines may have pre-set op->status; 1059 * for example, if there is a miscellaneous XDR error 1060 * it will be set to nfserr_bad_xdr. 1061 */ 1062 if (op->status) 1063 goto encode_op; 1064 1065 /* We must be able to encode a successful response to 1066 * this operation, with enough room left over to encode a 1067 * failed response to the next operation. If we don't 1068 * have enough room, fail with ERR_RESOURCE. 1069 */ 1070 slack_bytes = (char *)resp->end - (char *)resp->p; 1071 if (slack_bytes < COMPOUND_SLACK_SPACE 1072 + COMPOUND_ERR_SLACK_SPACE) { 1073 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); 1074 op->status = nfserr_resource; 1075 goto encode_op; 1076 } 1077 1078 opdesc = &nfsd4_ops[op->opnum]; 1079 1080 if (!cstate->current_fh.fh_dentry) { 1081 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1082 op->status = nfserr_nofilehandle; 1083 goto encode_op; 1084 } 1085 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && 1086 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1087 op->status = nfserr_moved; 1088 goto encode_op; 1089 } 1090 1091 if (opdesc->op_func) 1092 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1093 else 1094 BUG_ON(op->status == nfs_ok); 1095 1096 encode_op: 1097 /* Only from SEQUENCE */ 1098 if (resp->cstate.status == nfserr_replay_cache) { 1099 dprintk("%s NFS4.1 replay from cache\n", __func__); 1100 status = op->status; 1101 goto out; 1102 } 1103 if (op->status == nfserr_replay_me) { 1104 op->replay = &cstate->replay_owner->so_replay; 1105 nfsd4_encode_replay(resp, op); 1106 status = op->status = op->replay->rp_status; 1107 } else { 1108 nfsd4_encode_operation(resp, op); 1109 status = op->status; 1110 } 1111 1112 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1113 args->ops, args->opcnt, resp->opcnt, op->opnum, 1114 be32_to_cpu(status)); 1115 1116 if (cstate->replay_owner) { 1117 nfs4_put_stateowner(cstate->replay_owner); 1118 cstate->replay_owner = NULL; 1119 } 1120 /* XXX Ugh, we need to get rid of this kind of special case: */ 1121 if (op->opnum == OP_READ && op->u.read.rd_filp) 1122 fput(op->u.read.rd_filp); 1123 1124 nfsd4_increment_op_stats(op->opnum); 1125 } 1126 if (!rqstp->rq_usedeferral && status == nfserr_dropit) { 1127 dprintk("%s Dropit - send NFS4ERR_DELAY\n", __func__); 1128 status = nfserr_jukebox; 1129 } 1130 1131 resp->cstate.status = status; 1132 fh_put(&resp->cstate.current_fh); 1133 fh_put(&resp->cstate.save_fh); 1134 BUG_ON(resp->cstate.replay_owner); 1135 out: 1136 nfsd4_release_compoundargs(args); 1137 /* Reset deferral mechanism for RPC deferrals */ 1138 rqstp->rq_usedeferral = 1; 1139 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1140 return status; 1141 } 1142 1143 static struct nfsd4_operation nfsd4_ops[] = { 1144 [OP_ACCESS] = { 1145 .op_func = (nfsd4op_func)nfsd4_access, 1146 .op_name = "OP_ACCESS", 1147 }, 1148 [OP_CLOSE] = { 1149 .op_func = (nfsd4op_func)nfsd4_close, 1150 .op_name = "OP_CLOSE", 1151 }, 1152 [OP_COMMIT] = { 1153 .op_func = (nfsd4op_func)nfsd4_commit, 1154 .op_name = "OP_COMMIT", 1155 }, 1156 [OP_CREATE] = { 1157 .op_func = (nfsd4op_func)nfsd4_create, 1158 .op_name = "OP_CREATE", 1159 }, 1160 [OP_DELEGRETURN] = { 1161 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1162 .op_name = "OP_DELEGRETURN", 1163 }, 1164 [OP_GETATTR] = { 1165 .op_func = (nfsd4op_func)nfsd4_getattr, 1166 .op_flags = ALLOWED_ON_ABSENT_FS, 1167 .op_name = "OP_GETATTR", 1168 }, 1169 [OP_GETFH] = { 1170 .op_func = (nfsd4op_func)nfsd4_getfh, 1171 .op_name = "OP_GETFH", 1172 }, 1173 [OP_LINK] = { 1174 .op_func = (nfsd4op_func)nfsd4_link, 1175 .op_name = "OP_LINK", 1176 }, 1177 [OP_LOCK] = { 1178 .op_func = (nfsd4op_func)nfsd4_lock, 1179 .op_name = "OP_LOCK", 1180 }, 1181 [OP_LOCKT] = { 1182 .op_func = (nfsd4op_func)nfsd4_lockt, 1183 .op_name = "OP_LOCKT", 1184 }, 1185 [OP_LOCKU] = { 1186 .op_func = (nfsd4op_func)nfsd4_locku, 1187 .op_name = "OP_LOCKU", 1188 }, 1189 [OP_LOOKUP] = { 1190 .op_func = (nfsd4op_func)nfsd4_lookup, 1191 .op_name = "OP_LOOKUP", 1192 }, 1193 [OP_LOOKUPP] = { 1194 .op_func = (nfsd4op_func)nfsd4_lookupp, 1195 .op_name = "OP_LOOKUPP", 1196 }, 1197 [OP_NVERIFY] = { 1198 .op_func = (nfsd4op_func)nfsd4_nverify, 1199 .op_name = "OP_NVERIFY", 1200 }, 1201 [OP_OPEN] = { 1202 .op_func = (nfsd4op_func)nfsd4_open, 1203 .op_name = "OP_OPEN", 1204 }, 1205 [OP_OPEN_CONFIRM] = { 1206 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1207 .op_name = "OP_OPEN_CONFIRM", 1208 }, 1209 [OP_OPEN_DOWNGRADE] = { 1210 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1211 .op_name = "OP_OPEN_DOWNGRADE", 1212 }, 1213 [OP_PUTFH] = { 1214 .op_func = (nfsd4op_func)nfsd4_putfh, 1215 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1216 .op_name = "OP_PUTFH", 1217 }, 1218 [OP_PUTPUBFH] = { 1219 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1220 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1221 .op_name = "OP_PUTPUBFH", 1222 }, 1223 [OP_PUTROOTFH] = { 1224 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1225 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1226 .op_name = "OP_PUTROOTFH", 1227 }, 1228 [OP_READ] = { 1229 .op_func = (nfsd4op_func)nfsd4_read, 1230 .op_name = "OP_READ", 1231 }, 1232 [OP_READDIR] = { 1233 .op_func = (nfsd4op_func)nfsd4_readdir, 1234 .op_name = "OP_READDIR", 1235 }, 1236 [OP_READLINK] = { 1237 .op_func = (nfsd4op_func)nfsd4_readlink, 1238 .op_name = "OP_READLINK", 1239 }, 1240 [OP_REMOVE] = { 1241 .op_func = (nfsd4op_func)nfsd4_remove, 1242 .op_name = "OP_REMOVE", 1243 }, 1244 [OP_RENAME] = { 1245 .op_name = "OP_RENAME", 1246 .op_func = (nfsd4op_func)nfsd4_rename, 1247 }, 1248 [OP_RENEW] = { 1249 .op_func = (nfsd4op_func)nfsd4_renew, 1250 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1251 .op_name = "OP_RENEW", 1252 }, 1253 [OP_RESTOREFH] = { 1254 .op_func = (nfsd4op_func)nfsd4_restorefh, 1255 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1256 .op_name = "OP_RESTOREFH", 1257 }, 1258 [OP_SAVEFH] = { 1259 .op_func = (nfsd4op_func)nfsd4_savefh, 1260 .op_name = "OP_SAVEFH", 1261 }, 1262 [OP_SECINFO] = { 1263 .op_func = (nfsd4op_func)nfsd4_secinfo, 1264 .op_name = "OP_SECINFO", 1265 }, 1266 [OP_SETATTR] = { 1267 .op_func = (nfsd4op_func)nfsd4_setattr, 1268 .op_name = "OP_SETATTR", 1269 }, 1270 [OP_SETCLIENTID] = { 1271 .op_func = (nfsd4op_func)nfsd4_setclientid, 1272 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1273 .op_name = "OP_SETCLIENTID", 1274 }, 1275 [OP_SETCLIENTID_CONFIRM] = { 1276 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1277 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1278 .op_name = "OP_SETCLIENTID_CONFIRM", 1279 }, 1280 [OP_VERIFY] = { 1281 .op_func = (nfsd4op_func)nfsd4_verify, 1282 .op_name = "OP_VERIFY", 1283 }, 1284 [OP_WRITE] = { 1285 .op_func = (nfsd4op_func)nfsd4_write, 1286 .op_name = "OP_WRITE", 1287 }, 1288 [OP_RELEASE_LOCKOWNER] = { 1289 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1290 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1291 .op_name = "OP_RELEASE_LOCKOWNER", 1292 }, 1293 1294 /* NFSv4.1 operations */ 1295 [OP_EXCHANGE_ID] = { 1296 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1297 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1298 .op_name = "OP_EXCHANGE_ID", 1299 }, 1300 [OP_CREATE_SESSION] = { 1301 .op_func = (nfsd4op_func)nfsd4_create_session, 1302 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1303 .op_name = "OP_CREATE_SESSION", 1304 }, 1305 [OP_DESTROY_SESSION] = { 1306 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1307 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1308 .op_name = "OP_DESTROY_SESSION", 1309 }, 1310 [OP_SEQUENCE] = { 1311 .op_func = (nfsd4op_func)nfsd4_sequence, 1312 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1313 .op_name = "OP_SEQUENCE", 1314 }, 1315 [OP_RECLAIM_COMPLETE] = { 1316 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 1317 .op_flags = ALLOWED_WITHOUT_FH, 1318 .op_name = "OP_RECLAIM_COMPLETE", 1319 }, 1320 }; 1321 1322 static const char *nfsd4_op_name(unsigned opnum) 1323 { 1324 if (opnum < ARRAY_SIZE(nfsd4_ops)) 1325 return nfsd4_ops[opnum].op_name; 1326 return "unknown_operation"; 1327 } 1328 1329 #define nfsd4_voidres nfsd4_voidargs 1330 struct nfsd4_voidargs { int dummy; }; 1331 1332 /* 1333 * TODO: At the present time, the NFSv4 server does not do XID caching 1334 * of requests. Implementing XID caching would not be a serious problem, 1335 * although it would require a mild change in interfaces since one 1336 * doesn't know whether an NFSv4 request is idempotent until after the 1337 * XDR decode. However, XID caching totally confuses pynfs (Peter 1338 * Astrand's regression testsuite for NFSv4 servers), which reuses 1339 * XID's liberally, so I've left it unimplemented until pynfs generates 1340 * better XID's. 1341 */ 1342 static struct svc_procedure nfsd_procedures4[2] = { 1343 [NFSPROC4_NULL] = { 1344 .pc_func = (svc_procfunc) nfsd4_proc_null, 1345 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 1346 .pc_argsize = sizeof(struct nfsd4_voidargs), 1347 .pc_ressize = sizeof(struct nfsd4_voidres), 1348 .pc_cachetype = RC_NOCACHE, 1349 .pc_xdrressize = 1, 1350 }, 1351 [NFSPROC4_COMPOUND] = { 1352 .pc_func = (svc_procfunc) nfsd4_proc_compound, 1353 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 1354 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 1355 .pc_argsize = sizeof(struct nfsd4_compoundargs), 1356 .pc_ressize = sizeof(struct nfsd4_compoundres), 1357 .pc_cachetype = RC_NOCACHE, 1358 .pc_xdrressize = NFSD_BUFSIZE/4, 1359 }, 1360 }; 1361 1362 struct svc_version nfsd_version4 = { 1363 .vs_vers = 4, 1364 .vs_nproc = 2, 1365 .vs_proc = nfsd_procedures4, 1366 .vs_dispatch = nfsd_dispatch, 1367 .vs_xdrsize = NFS4_SVC_XDRSIZE, 1368 }; 1369 1370 /* 1371 * Local variables: 1372 * c-basic-offset: 8 1373 * End: 1374 */ 1375