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 except EXCLUSIVE4_1. 200 */ 201 status = do_nfsd_create(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_BYPASS_GSS); 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 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 608 { 609 struct svc_fh tmp_fh; 610 __be32 ret; 611 612 fh_init(&tmp_fh, NFS4_FHSIZE); 613 ret = exp_pseudoroot(rqstp, &tmp_fh); 614 if (ret) 615 return ret; 616 if (tmp_fh.fh_dentry == fh->fh_dentry) { 617 fh_put(&tmp_fh); 618 return nfserr_noent; 619 } 620 fh_put(&tmp_fh); 621 return nfsd_lookup(rqstp, fh, "..", 2, fh); 622 } 623 624 static __be32 625 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 626 void *arg) 627 { 628 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 629 } 630 631 static __be32 632 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 633 struct nfsd4_lookup *lookup) 634 { 635 return nfsd_lookup(rqstp, &cstate->current_fh, 636 lookup->lo_name, lookup->lo_len, 637 &cstate->current_fh); 638 } 639 640 static __be32 641 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 642 struct nfsd4_read *read) 643 { 644 __be32 status; 645 646 /* no need to check permission - this will be done in nfsd_read() */ 647 648 read->rd_filp = NULL; 649 if (read->rd_offset >= OFFSET_MAX) 650 return nfserr_inval; 651 652 nfs4_lock_state(); 653 /* check stateid */ 654 if ((status = nfs4_preprocess_stateid_op(cstate, &read->rd_stateid, 655 RD_STATE, &read->rd_filp))) { 656 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 657 goto out; 658 } 659 if (read->rd_filp) 660 get_file(read->rd_filp); 661 status = nfs_ok; 662 out: 663 nfs4_unlock_state(); 664 read->rd_rqstp = rqstp; 665 read->rd_fhp = &cstate->current_fh; 666 return status; 667 } 668 669 static __be32 670 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 671 struct nfsd4_readdir *readdir) 672 { 673 u64 cookie = readdir->rd_cookie; 674 static const nfs4_verifier zeroverf; 675 676 /* no need to check permission - this will be done in nfsd_readdir() */ 677 678 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 679 return nfserr_inval; 680 681 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 682 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 683 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 684 685 if ((cookie > ~(u32)0) || (cookie == 1) || (cookie == 2) || 686 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 687 return nfserr_bad_cookie; 688 689 readdir->rd_rqstp = rqstp; 690 readdir->rd_fhp = &cstate->current_fh; 691 return nfs_ok; 692 } 693 694 static __be32 695 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 696 struct nfsd4_readlink *readlink) 697 { 698 readlink->rl_rqstp = rqstp; 699 readlink->rl_fhp = &cstate->current_fh; 700 return nfs_ok; 701 } 702 703 static __be32 704 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 705 struct nfsd4_remove *remove) 706 { 707 __be32 status; 708 709 if (locks_in_grace()) 710 return nfserr_grace; 711 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 712 remove->rm_name, remove->rm_namelen); 713 if (status == nfserr_symlink) 714 return nfserr_notdir; 715 if (!status) { 716 fh_unlock(&cstate->current_fh); 717 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 718 } 719 return status; 720 } 721 722 static __be32 723 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 724 struct nfsd4_rename *rename) 725 { 726 __be32 status = nfserr_nofilehandle; 727 728 if (!cstate->save_fh.fh_dentry) 729 return status; 730 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags 731 & NFSEXP_NOSUBTREECHECK)) 732 return nfserr_grace; 733 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 734 rename->rn_snamelen, &cstate->current_fh, 735 rename->rn_tname, rename->rn_tnamelen); 736 737 /* the underlying filesystem returns different error's than required 738 * by NFSv4. both save_fh and current_fh have been verified.. */ 739 if (status == nfserr_isdir) 740 status = nfserr_exist; 741 else if ((status == nfserr_notdir) && 742 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) && 743 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode))) 744 status = nfserr_exist; 745 else if (status == nfserr_symlink) 746 status = nfserr_notdir; 747 748 if (!status) { 749 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 750 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 751 } 752 return status; 753 } 754 755 static __be32 756 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 757 struct nfsd4_secinfo *secinfo) 758 { 759 struct svc_fh resfh; 760 struct svc_export *exp; 761 struct dentry *dentry; 762 __be32 err; 763 764 fh_init(&resfh, NFS4_FHSIZE); 765 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 766 if (err) 767 return err; 768 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 769 secinfo->si_name, secinfo->si_namelen, 770 &exp, &dentry); 771 if (err) 772 return err; 773 if (dentry->d_inode == NULL) { 774 exp_put(exp); 775 err = nfserr_noent; 776 } else 777 secinfo->si_exp = exp; 778 dput(dentry); 779 if (cstate->minorversion) 780 /* See rfc 5661 section 2.6.3.1.1.8 */ 781 fh_put(&cstate->current_fh); 782 return err; 783 } 784 785 static __be32 786 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 787 struct nfsd4_secinfo_no_name *sin) 788 { 789 __be32 err; 790 791 switch (sin->sin_style) { 792 case NFS4_SECINFO_STYLE4_CURRENT_FH: 793 break; 794 case NFS4_SECINFO_STYLE4_PARENT: 795 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 796 if (err) 797 return err; 798 break; 799 default: 800 return nfserr_inval; 801 } 802 exp_get(cstate->current_fh.fh_export); 803 sin->sin_exp = cstate->current_fh.fh_export; 804 fh_put(&cstate->current_fh); 805 return nfs_ok; 806 } 807 808 static __be32 809 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 810 struct nfsd4_setattr *setattr) 811 { 812 __be32 status = nfs_ok; 813 814 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 815 nfs4_lock_state(); 816 status = nfs4_preprocess_stateid_op(cstate, 817 &setattr->sa_stateid, WR_STATE, NULL); 818 nfs4_unlock_state(); 819 if (status) { 820 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 821 return status; 822 } 823 } 824 status = mnt_want_write(cstate->current_fh.fh_export->ex_path.mnt); 825 if (status) 826 return status; 827 status = nfs_ok; 828 829 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 830 nfsd_attrmask); 831 if (status) 832 goto out; 833 834 if (setattr->sa_acl != NULL) 835 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 836 setattr->sa_acl); 837 if (status) 838 goto out; 839 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 840 0, (time_t)0); 841 out: 842 mnt_drop_write(cstate->current_fh.fh_export->ex_path.mnt); 843 return status; 844 } 845 846 static __be32 847 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 848 struct nfsd4_write *write) 849 { 850 stateid_t *stateid = &write->wr_stateid; 851 struct file *filp = NULL; 852 u32 *p; 853 __be32 status = nfs_ok; 854 unsigned long cnt; 855 856 /* no need to check permission - this will be done in nfsd_write() */ 857 858 if (write->wr_offset >= OFFSET_MAX) 859 return nfserr_inval; 860 861 nfs4_lock_state(); 862 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp); 863 if (filp) 864 get_file(filp); 865 nfs4_unlock_state(); 866 867 if (status) { 868 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 869 return status; 870 } 871 872 cnt = write->wr_buflen; 873 write->wr_how_written = write->wr_stable_how; 874 p = (u32 *)write->wr_verifier.data; 875 *p++ = nfssvc_boot.tv_sec; 876 *p++ = nfssvc_boot.tv_usec; 877 878 status = nfsd_write(rqstp, &cstate->current_fh, filp, 879 write->wr_offset, rqstp->rq_vec, write->wr_vlen, 880 &cnt, &write->wr_how_written); 881 if (filp) 882 fput(filp); 883 884 write->wr_bytes_written = cnt; 885 886 if (status == nfserr_symlink) 887 status = nfserr_inval; 888 return status; 889 } 890 891 /* This routine never returns NFS_OK! If there are no other errors, it 892 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 893 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 894 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 895 */ 896 static __be32 897 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 898 struct nfsd4_verify *verify) 899 { 900 __be32 *buf, *p; 901 int count; 902 __be32 status; 903 904 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 905 if (status) 906 return status; 907 908 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 909 if (status) 910 return status; 911 912 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 913 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 914 return nfserr_inval; 915 if (verify->ve_attrlen & 3) 916 return nfserr_inval; 917 918 /* count in words: 919 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 920 */ 921 count = 4 + (verify->ve_attrlen >> 2); 922 buf = kmalloc(count << 2, GFP_KERNEL); 923 if (!buf) 924 return nfserr_resource; 925 926 status = nfsd4_encode_fattr(&cstate->current_fh, 927 cstate->current_fh.fh_export, 928 cstate->current_fh.fh_dentry, buf, 929 &count, verify->ve_bmval, 930 rqstp, 0); 931 932 /* this means that nfsd4_encode_fattr() ran out of space */ 933 if (status == nfserr_resource && count == 0) 934 status = nfserr_not_same; 935 if (status) 936 goto out_kfree; 937 938 /* skip bitmap */ 939 p = buf + 1 + ntohl(buf[0]); 940 status = nfserr_not_same; 941 if (ntohl(*p++) != verify->ve_attrlen) 942 goto out_kfree; 943 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 944 status = nfserr_same; 945 946 out_kfree: 947 kfree(buf); 948 return status; 949 } 950 951 static __be32 952 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 953 struct nfsd4_verify *verify) 954 { 955 __be32 status; 956 957 status = _nfsd4_verify(rqstp, cstate, verify); 958 return status == nfserr_not_same ? nfs_ok : status; 959 } 960 961 static __be32 962 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 963 struct nfsd4_verify *verify) 964 { 965 __be32 status; 966 967 status = _nfsd4_verify(rqstp, cstate, verify); 968 return status == nfserr_same ? nfs_ok : status; 969 } 970 971 /* 972 * NULL call. 973 */ 974 static __be32 975 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 976 { 977 return nfs_ok; 978 } 979 980 static inline void nfsd4_increment_op_stats(u32 opnum) 981 { 982 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 983 nfsdstats.nfs4_opcount[opnum]++; 984 } 985 986 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 987 void *); 988 enum nfsd4_op_flags { 989 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 990 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 991 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 992 /* For rfc 5661 section 2.6.3.1.1: */ 993 OP_HANDLES_WRONGSEC = 1 << 3, 994 OP_IS_PUTFH_LIKE = 1 << 4, 995 }; 996 997 struct nfsd4_operation { 998 nfsd4op_func op_func; 999 u32 op_flags; 1000 char *op_name; 1001 }; 1002 1003 static struct nfsd4_operation nfsd4_ops[]; 1004 1005 static const char *nfsd4_op_name(unsigned opnum); 1006 1007 /* 1008 * Enforce NFSv4.1 COMPOUND ordering rules: 1009 * 1010 * Also note, enforced elsewhere: 1011 * - SEQUENCE other than as first op results in 1012 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1013 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1014 * (Enforced in nfsd4_bind_conn_to_session().) 1015 * - DESTROY_SESSION must be the final operation in a compound, if 1016 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1017 * (Enforced in nfsd4_destroy_session().) 1018 */ 1019 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1020 { 1021 struct nfsd4_op *op = &args->ops[0]; 1022 1023 /* These ordering requirements don't apply to NFSv4.0: */ 1024 if (args->minorversion == 0) 1025 return nfs_ok; 1026 /* This is weird, but OK, not our problem: */ 1027 if (args->opcnt == 0) 1028 return nfs_ok; 1029 if (op->status == nfserr_op_illegal) 1030 return nfs_ok; 1031 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1032 return nfserr_op_not_in_session; 1033 if (op->opnum == OP_SEQUENCE) 1034 return nfs_ok; 1035 if (args->opcnt != 1) 1036 return nfserr_not_only_op; 1037 return nfs_ok; 1038 } 1039 1040 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1041 { 1042 return &nfsd4_ops[op->opnum]; 1043 } 1044 1045 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1046 { 1047 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1048 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1049 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1050 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1051 struct nfsd4_operation *thisd; 1052 struct nfsd4_operation *nextd; 1053 1054 thisd = OPDESC(this); 1055 /* 1056 * Most ops check wronsec on our own; only the putfh-like ops 1057 * have special rules. 1058 */ 1059 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1060 return false; 1061 /* 1062 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1063 * put-filehandle operation if we're not going to use the 1064 * result: 1065 */ 1066 if (argp->opcnt == resp->opcnt) 1067 return false; 1068 1069 nextd = OPDESC(next); 1070 /* 1071 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1072 * errors themselves as necessary; others should check for them 1073 * now: 1074 */ 1075 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1076 } 1077 1078 /* 1079 * COMPOUND call. 1080 */ 1081 static __be32 1082 nfsd4_proc_compound(struct svc_rqst *rqstp, 1083 struct nfsd4_compoundargs *args, 1084 struct nfsd4_compoundres *resp) 1085 { 1086 struct nfsd4_op *op; 1087 struct nfsd4_operation *opdesc; 1088 struct nfsd4_compound_state *cstate = &resp->cstate; 1089 int slack_bytes; 1090 __be32 status; 1091 1092 resp->xbuf = &rqstp->rq_res; 1093 resp->p = rqstp->rq_res.head[0].iov_base + 1094 rqstp->rq_res.head[0].iov_len; 1095 resp->tagp = resp->p; 1096 /* reserve space for: taglen, tag, and opcnt */ 1097 resp->p += 2 + XDR_QUADLEN(args->taglen); 1098 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; 1099 resp->taglen = args->taglen; 1100 resp->tag = args->tag; 1101 resp->opcnt = 0; 1102 resp->rqstp = rqstp; 1103 resp->cstate.minorversion = args->minorversion; 1104 resp->cstate.replay_owner = NULL; 1105 resp->cstate.session = NULL; 1106 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); 1107 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); 1108 /* 1109 * Don't use the deferral mechanism for NFSv4; compounds make it 1110 * too hard to avoid non-idempotency problems. 1111 */ 1112 rqstp->rq_usedeferral = 0; 1113 1114 /* 1115 * According to RFC3010, this takes precedence over all other errors. 1116 */ 1117 status = nfserr_minor_vers_mismatch; 1118 if (args->minorversion > nfsd_supported_minorversion) 1119 goto out; 1120 1121 status = nfs41_check_op_ordering(args); 1122 if (status) { 1123 op = &args->ops[0]; 1124 op->status = status; 1125 goto encode_op; 1126 } 1127 1128 while (!status && resp->opcnt < args->opcnt) { 1129 op = &args->ops[resp->opcnt++]; 1130 1131 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1132 resp->opcnt, args->opcnt, op->opnum, 1133 nfsd4_op_name(op->opnum)); 1134 /* 1135 * The XDR decode routines may have pre-set op->status; 1136 * for example, if there is a miscellaneous XDR error 1137 * it will be set to nfserr_bad_xdr. 1138 */ 1139 if (op->status) 1140 goto encode_op; 1141 1142 /* We must be able to encode a successful response to 1143 * this operation, with enough room left over to encode a 1144 * failed response to the next operation. If we don't 1145 * have enough room, fail with ERR_RESOURCE. 1146 */ 1147 slack_bytes = (char *)resp->end - (char *)resp->p; 1148 if (slack_bytes < COMPOUND_SLACK_SPACE 1149 + COMPOUND_ERR_SLACK_SPACE) { 1150 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); 1151 op->status = nfserr_resource; 1152 goto encode_op; 1153 } 1154 1155 opdesc = OPDESC(op); 1156 1157 if (!cstate->current_fh.fh_dentry) { 1158 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1159 op->status = nfserr_nofilehandle; 1160 goto encode_op; 1161 } 1162 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && 1163 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1164 op->status = nfserr_moved; 1165 goto encode_op; 1166 } 1167 1168 if (opdesc->op_func) 1169 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1170 else 1171 BUG_ON(op->status == nfs_ok); 1172 1173 if (!op->status && need_wrongsec_check(rqstp)) 1174 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp); 1175 1176 encode_op: 1177 /* Only from SEQUENCE */ 1178 if (resp->cstate.status == nfserr_replay_cache) { 1179 dprintk("%s NFS4.1 replay from cache\n", __func__); 1180 status = op->status; 1181 goto out; 1182 } 1183 if (op->status == nfserr_replay_me) { 1184 op->replay = &cstate->replay_owner->so_replay; 1185 nfsd4_encode_replay(resp, op); 1186 status = op->status = op->replay->rp_status; 1187 } else { 1188 nfsd4_encode_operation(resp, op); 1189 status = op->status; 1190 } 1191 1192 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1193 args->ops, args->opcnt, resp->opcnt, op->opnum, 1194 be32_to_cpu(status)); 1195 1196 if (cstate->replay_owner) { 1197 nfs4_put_stateowner(cstate->replay_owner); 1198 cstate->replay_owner = NULL; 1199 } 1200 /* XXX Ugh, we need to get rid of this kind of special case: */ 1201 if (op->opnum == OP_READ && op->u.read.rd_filp) 1202 fput(op->u.read.rd_filp); 1203 1204 nfsd4_increment_op_stats(op->opnum); 1205 } 1206 1207 resp->cstate.status = status; 1208 fh_put(&resp->cstate.current_fh); 1209 fh_put(&resp->cstate.save_fh); 1210 BUG_ON(resp->cstate.replay_owner); 1211 out: 1212 nfsd4_release_compoundargs(args); 1213 /* Reset deferral mechanism for RPC deferrals */ 1214 rqstp->rq_usedeferral = 1; 1215 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1216 return status; 1217 } 1218 1219 static struct nfsd4_operation nfsd4_ops[] = { 1220 [OP_ACCESS] = { 1221 .op_func = (nfsd4op_func)nfsd4_access, 1222 .op_name = "OP_ACCESS", 1223 }, 1224 [OP_CLOSE] = { 1225 .op_func = (nfsd4op_func)nfsd4_close, 1226 .op_name = "OP_CLOSE", 1227 }, 1228 [OP_COMMIT] = { 1229 .op_func = (nfsd4op_func)nfsd4_commit, 1230 .op_name = "OP_COMMIT", 1231 }, 1232 [OP_CREATE] = { 1233 .op_func = (nfsd4op_func)nfsd4_create, 1234 .op_name = "OP_CREATE", 1235 }, 1236 [OP_DELEGRETURN] = { 1237 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1238 .op_name = "OP_DELEGRETURN", 1239 }, 1240 [OP_GETATTR] = { 1241 .op_func = (nfsd4op_func)nfsd4_getattr, 1242 .op_flags = ALLOWED_ON_ABSENT_FS, 1243 .op_name = "OP_GETATTR", 1244 }, 1245 [OP_GETFH] = { 1246 .op_func = (nfsd4op_func)nfsd4_getfh, 1247 .op_name = "OP_GETFH", 1248 }, 1249 [OP_LINK] = { 1250 .op_func = (nfsd4op_func)nfsd4_link, 1251 .op_name = "OP_LINK", 1252 }, 1253 [OP_LOCK] = { 1254 .op_func = (nfsd4op_func)nfsd4_lock, 1255 .op_name = "OP_LOCK", 1256 }, 1257 [OP_LOCKT] = { 1258 .op_func = (nfsd4op_func)nfsd4_lockt, 1259 .op_name = "OP_LOCKT", 1260 }, 1261 [OP_LOCKU] = { 1262 .op_func = (nfsd4op_func)nfsd4_locku, 1263 .op_name = "OP_LOCKU", 1264 }, 1265 [OP_LOOKUP] = { 1266 .op_func = (nfsd4op_func)nfsd4_lookup, 1267 .op_flags = OP_HANDLES_WRONGSEC, 1268 .op_name = "OP_LOOKUP", 1269 }, 1270 [OP_LOOKUPP] = { 1271 .op_func = (nfsd4op_func)nfsd4_lookupp, 1272 .op_flags = OP_HANDLES_WRONGSEC, 1273 .op_name = "OP_LOOKUPP", 1274 }, 1275 [OP_NVERIFY] = { 1276 .op_func = (nfsd4op_func)nfsd4_nverify, 1277 .op_name = "OP_NVERIFY", 1278 }, 1279 [OP_OPEN] = { 1280 .op_func = (nfsd4op_func)nfsd4_open, 1281 .op_flags = OP_HANDLES_WRONGSEC, 1282 .op_name = "OP_OPEN", 1283 }, 1284 [OP_OPEN_CONFIRM] = { 1285 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1286 .op_name = "OP_OPEN_CONFIRM", 1287 }, 1288 [OP_OPEN_DOWNGRADE] = { 1289 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1290 .op_name = "OP_OPEN_DOWNGRADE", 1291 }, 1292 [OP_PUTFH] = { 1293 .op_func = (nfsd4op_func)nfsd4_putfh, 1294 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1295 | OP_IS_PUTFH_LIKE, 1296 .op_name = "OP_PUTFH", 1297 }, 1298 [OP_PUTPUBFH] = { 1299 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1300 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1301 | OP_IS_PUTFH_LIKE, 1302 .op_name = "OP_PUTPUBFH", 1303 }, 1304 [OP_PUTROOTFH] = { 1305 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1306 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1307 | OP_IS_PUTFH_LIKE, 1308 .op_name = "OP_PUTROOTFH", 1309 }, 1310 [OP_READ] = { 1311 .op_func = (nfsd4op_func)nfsd4_read, 1312 .op_name = "OP_READ", 1313 }, 1314 [OP_READDIR] = { 1315 .op_func = (nfsd4op_func)nfsd4_readdir, 1316 .op_name = "OP_READDIR", 1317 }, 1318 [OP_READLINK] = { 1319 .op_func = (nfsd4op_func)nfsd4_readlink, 1320 .op_name = "OP_READLINK", 1321 }, 1322 [OP_REMOVE] = { 1323 .op_func = (nfsd4op_func)nfsd4_remove, 1324 .op_name = "OP_REMOVE", 1325 }, 1326 [OP_RENAME] = { 1327 .op_name = "OP_RENAME", 1328 .op_func = (nfsd4op_func)nfsd4_rename, 1329 }, 1330 [OP_RENEW] = { 1331 .op_func = (nfsd4op_func)nfsd4_renew, 1332 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1333 .op_name = "OP_RENEW", 1334 }, 1335 [OP_RESTOREFH] = { 1336 .op_func = (nfsd4op_func)nfsd4_restorefh, 1337 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1338 | OP_IS_PUTFH_LIKE, 1339 .op_name = "OP_RESTOREFH", 1340 }, 1341 [OP_SAVEFH] = { 1342 .op_func = (nfsd4op_func)nfsd4_savefh, 1343 .op_flags = OP_HANDLES_WRONGSEC, 1344 .op_name = "OP_SAVEFH", 1345 }, 1346 [OP_SECINFO] = { 1347 .op_func = (nfsd4op_func)nfsd4_secinfo, 1348 .op_flags = OP_HANDLES_WRONGSEC, 1349 .op_name = "OP_SECINFO", 1350 }, 1351 [OP_SETATTR] = { 1352 .op_func = (nfsd4op_func)nfsd4_setattr, 1353 .op_name = "OP_SETATTR", 1354 }, 1355 [OP_SETCLIENTID] = { 1356 .op_func = (nfsd4op_func)nfsd4_setclientid, 1357 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1358 .op_name = "OP_SETCLIENTID", 1359 }, 1360 [OP_SETCLIENTID_CONFIRM] = { 1361 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1362 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1363 .op_name = "OP_SETCLIENTID_CONFIRM", 1364 }, 1365 [OP_VERIFY] = { 1366 .op_func = (nfsd4op_func)nfsd4_verify, 1367 .op_name = "OP_VERIFY", 1368 }, 1369 [OP_WRITE] = { 1370 .op_func = (nfsd4op_func)nfsd4_write, 1371 .op_name = "OP_WRITE", 1372 }, 1373 [OP_RELEASE_LOCKOWNER] = { 1374 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1375 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS, 1376 .op_name = "OP_RELEASE_LOCKOWNER", 1377 }, 1378 1379 /* NFSv4.1 operations */ 1380 [OP_EXCHANGE_ID] = { 1381 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1382 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1383 .op_name = "OP_EXCHANGE_ID", 1384 }, 1385 [OP_BIND_CONN_TO_SESSION] = { 1386 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 1387 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1388 .op_name = "OP_BIND_CONN_TO_SESSION", 1389 }, 1390 [OP_CREATE_SESSION] = { 1391 .op_func = (nfsd4op_func)nfsd4_create_session, 1392 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1393 .op_name = "OP_CREATE_SESSION", 1394 }, 1395 [OP_DESTROY_SESSION] = { 1396 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1397 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1398 .op_name = "OP_DESTROY_SESSION", 1399 }, 1400 [OP_SEQUENCE] = { 1401 .op_func = (nfsd4op_func)nfsd4_sequence, 1402 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1403 .op_name = "OP_SEQUENCE", 1404 }, 1405 [OP_RECLAIM_COMPLETE] = { 1406 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 1407 .op_flags = ALLOWED_WITHOUT_FH, 1408 .op_name = "OP_RECLAIM_COMPLETE", 1409 }, 1410 [OP_SECINFO_NO_NAME] = { 1411 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 1412 .op_flags = OP_HANDLES_WRONGSEC, 1413 .op_name = "OP_SECINFO_NO_NAME", 1414 }, 1415 }; 1416 1417 static const char *nfsd4_op_name(unsigned opnum) 1418 { 1419 if (opnum < ARRAY_SIZE(nfsd4_ops)) 1420 return nfsd4_ops[opnum].op_name; 1421 return "unknown_operation"; 1422 } 1423 1424 #define nfsd4_voidres nfsd4_voidargs 1425 struct nfsd4_voidargs { int dummy; }; 1426 1427 /* 1428 * TODO: At the present time, the NFSv4 server does not do XID caching 1429 * of requests. Implementing XID caching would not be a serious problem, 1430 * although it would require a mild change in interfaces since one 1431 * doesn't know whether an NFSv4 request is idempotent until after the 1432 * XDR decode. However, XID caching totally confuses pynfs (Peter 1433 * Astrand's regression testsuite for NFSv4 servers), which reuses 1434 * XID's liberally, so I've left it unimplemented until pynfs generates 1435 * better XID's. 1436 */ 1437 static struct svc_procedure nfsd_procedures4[2] = { 1438 [NFSPROC4_NULL] = { 1439 .pc_func = (svc_procfunc) nfsd4_proc_null, 1440 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 1441 .pc_argsize = sizeof(struct nfsd4_voidargs), 1442 .pc_ressize = sizeof(struct nfsd4_voidres), 1443 .pc_cachetype = RC_NOCACHE, 1444 .pc_xdrressize = 1, 1445 }, 1446 [NFSPROC4_COMPOUND] = { 1447 .pc_func = (svc_procfunc) nfsd4_proc_compound, 1448 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 1449 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 1450 .pc_argsize = sizeof(struct nfsd4_compoundargs), 1451 .pc_ressize = sizeof(struct nfsd4_compoundres), 1452 .pc_cachetype = RC_NOCACHE, 1453 .pc_xdrressize = NFSD_BUFSIZE/4, 1454 }, 1455 }; 1456 1457 struct svc_version nfsd_version4 = { 1458 .vs_vers = 4, 1459 .vs_nproc = 2, 1460 .vs_proc = nfsd_procedures4, 1461 .vs_dispatch = nfsd_dispatch, 1462 .vs_xdrsize = NFS4_SVC_XDRSIZE, 1463 }; 1464 1465 /* 1466 * Local variables: 1467 * c-basic-offset: 8 1468 * End: 1469 */ 1470