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 "idmap.h" 39 #include "cache.h" 40 #include "xdr4.h" 41 #include "vfs.h" 42 #include "current_stateid.h" 43 #include "netns.h" 44 45 #define NFSDDBG_FACILITY NFSDDBG_PROC 46 47 static u32 nfsd_attrmask[] = { 48 NFSD_WRITEABLE_ATTRS_WORD0, 49 NFSD_WRITEABLE_ATTRS_WORD1, 50 NFSD_WRITEABLE_ATTRS_WORD2 51 }; 52 53 static u32 nfsd41_ex_attrmask[] = { 54 NFSD_SUPPATTR_EXCLCREAT_WORD0, 55 NFSD_SUPPATTR_EXCLCREAT_WORD1, 56 NFSD_SUPPATTR_EXCLCREAT_WORD2 57 }; 58 59 static __be32 60 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 61 u32 *bmval, u32 *writable) 62 { 63 struct dentry *dentry = cstate->current_fh.fh_dentry; 64 65 /* 66 * Check about attributes are supported by the NFSv4 server or not. 67 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. 68 */ 69 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || 70 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || 71 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) 72 return nfserr_attrnotsupp; 73 74 /* 75 * Check FATTR4_WORD0_ACL can be supported 76 * in current environment or not. 77 */ 78 if (bmval[0] & FATTR4_WORD0_ACL) { 79 if (!IS_POSIXACL(dentry->d_inode)) 80 return nfserr_attrnotsupp; 81 } 82 83 /* 84 * According to spec, read-only attributes return ERR_INVAL. 85 */ 86 if (writable) { 87 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || 88 (bmval[2] & ~writable[2])) 89 return nfserr_inval; 90 } 91 92 return nfs_ok; 93 } 94 95 static __be32 96 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 97 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 98 { 99 __be32 status = nfs_ok; 100 101 if (open->op_create == NFS4_OPEN_CREATE) { 102 if (open->op_createmode == NFS4_CREATE_UNCHECKED 103 || open->op_createmode == NFS4_CREATE_GUARDED) 104 status = check_attr_support(rqstp, cstate, 105 open->op_bmval, nfsd_attrmask); 106 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 107 status = check_attr_support(rqstp, cstate, 108 open->op_bmval, nfsd41_ex_attrmask); 109 } 110 111 return status; 112 } 113 114 static int 115 is_create_with_attrs(struct nfsd4_open *open) 116 { 117 return open->op_create == NFS4_OPEN_CREATE 118 && (open->op_createmode == NFS4_CREATE_UNCHECKED 119 || open->op_createmode == NFS4_CREATE_GUARDED 120 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 121 } 122 123 /* 124 * if error occurs when setting the acl, just clear the acl bit 125 * in the returned attr bitmap. 126 */ 127 static void 128 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 129 struct nfs4_acl *acl, u32 *bmval) 130 { 131 __be32 status; 132 133 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 134 if (status) 135 /* 136 * We should probably fail the whole open at this point, 137 * but we've already created the file, so it's too late; 138 * So this seems the least of evils: 139 */ 140 bmval[0] &= ~FATTR4_WORD0_ACL; 141 } 142 143 static inline void 144 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 145 { 146 fh_put(dst); 147 dget(src->fh_dentry); 148 if (src->fh_export) 149 cache_get(&src->fh_export->h); 150 *dst = *src; 151 } 152 153 static __be32 154 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 155 { 156 __be32 status; 157 158 if (open->op_truncate && 159 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 160 return nfserr_inval; 161 162 accmode |= NFSD_MAY_READ_IF_EXEC; 163 164 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 165 accmode |= NFSD_MAY_READ; 166 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 167 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 168 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 169 accmode |= NFSD_MAY_WRITE; 170 171 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 172 173 return status; 174 } 175 176 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 177 { 178 umode_t mode = fh->fh_dentry->d_inode->i_mode; 179 180 if (S_ISREG(mode)) 181 return nfs_ok; 182 if (S_ISDIR(mode)) 183 return nfserr_isdir; 184 /* 185 * Using err_symlink as our catch-all case may look odd; but 186 * there's no other obvious error for this case in 4.0, and we 187 * happen to know that it will cause the linux v4 client to do 188 * the right thing on attempts to open something other than a 189 * regular file. 190 */ 191 return nfserr_symlink; 192 } 193 194 static __be32 195 do_open_lookup(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 196 { 197 struct svc_fh *resfh; 198 int accmode; 199 __be32 status; 200 201 resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 202 if (!resfh) 203 return nfserr_jukebox; 204 fh_init(resfh, NFS4_FHSIZE); 205 open->op_truncate = 0; 206 207 if (open->op_create) { 208 /* FIXME: check session persistence and pnfs flags. 209 * The nfsv4.1 spec requires the following semantics: 210 * 211 * Persistent | pNFS | Server REQUIRED | Client Allowed 212 * Reply Cache | server | | 213 * -------------+--------+-----------------+-------------------- 214 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 215 * | | | (SHOULD) 216 * | | and EXCLUSIVE4 | or EXCLUSIVE4 217 * | | | (SHOULD NOT) 218 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 219 * yes | no | GUARDED4 | GUARDED4 220 * yes | yes | GUARDED4 | GUARDED4 221 */ 222 223 /* 224 * Note: create modes (UNCHECKED,GUARDED...) are the same 225 * in NFSv4 as in v3 except EXCLUSIVE4_1. 226 */ 227 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, 228 open->op_fname.len, &open->op_iattr, 229 resfh, open->op_createmode, 230 (u32 *)open->op_verf.data, 231 &open->op_truncate, &open->op_created); 232 233 /* 234 * Following rfc 3530 14.2.16, use the returned bitmask 235 * to indicate which attributes we used to store the 236 * verifier: 237 */ 238 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) 239 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | 240 FATTR4_WORD1_TIME_MODIFY); 241 } else { 242 status = nfsd_lookup(rqstp, current_fh, 243 open->op_fname.data, open->op_fname.len, resfh); 244 fh_unlock(current_fh); 245 } 246 if (status) 247 goto out; 248 status = nfsd_check_obj_isreg(resfh); 249 if (status) 250 goto out; 251 252 if (is_create_with_attrs(open) && open->op_acl != NULL) 253 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval); 254 255 /* set reply cache */ 256 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 257 &resfh->fh_handle); 258 accmode = NFSD_MAY_NOP; 259 if (open->op_created) 260 accmode |= NFSD_MAY_OWNER_OVERRIDE; 261 status = do_open_permission(rqstp, resfh, open, accmode); 262 set_change_info(&open->op_cinfo, current_fh); 263 fh_dup2(current_fh, resfh); 264 out: 265 fh_put(resfh); 266 kfree(resfh); 267 return status; 268 } 269 270 static __be32 271 do_open_fhandle(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 272 { 273 __be32 status; 274 275 /* We don't know the target directory, and therefore can not 276 * set the change info 277 */ 278 279 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 280 281 /* set replay cache */ 282 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 283 ¤t_fh->fh_handle); 284 285 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 286 (open->op_iattr.ia_size == 0); 287 288 status = do_open_permission(rqstp, current_fh, open, 289 NFSD_MAY_OWNER_OVERRIDE); 290 291 return status; 292 } 293 294 static void 295 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 296 { 297 struct nfsd4_sessionid *sid = 298 (struct nfsd4_sessionid *)session->se_sessionid.data; 299 300 clid->cl_boot = sid->clientid.cl_boot; 301 clid->cl_id = sid->clientid.cl_id; 302 } 303 304 static __be32 305 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 306 struct nfsd4_open *open) 307 { 308 __be32 status; 309 struct nfsd4_compoundres *resp; 310 struct net *net = SVC_NET(rqstp); 311 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 312 313 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 314 (int)open->op_fname.len, open->op_fname.data, 315 open->op_openowner); 316 317 /* This check required by spec. */ 318 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 319 return nfserr_inval; 320 321 open->op_created = 0; 322 /* 323 * RFC5661 18.51.3 324 * Before RECLAIM_COMPLETE done, server should deny new lock 325 */ 326 if (nfsd4_has_session(cstate) && 327 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 328 &cstate->session->se_client->cl_flags) && 329 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 330 return nfserr_grace; 331 332 if (nfsd4_has_session(cstate)) 333 copy_clientid(&open->op_clientid, cstate->session); 334 335 nfs4_lock_state(); 336 337 /* check seqid for replay. set nfs4_owner */ 338 resp = rqstp->rq_resp; 339 status = nfsd4_process_open1(&resp->cstate, open, nn); 340 if (status == nfserr_replay_me) { 341 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 342 fh_put(&cstate->current_fh); 343 fh_copy_shallow(&cstate->current_fh.fh_handle, 344 &rp->rp_openfh); 345 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 346 if (status) 347 dprintk("nfsd4_open: replay failed" 348 " restoring previous filehandle\n"); 349 else 350 status = nfserr_replay_me; 351 } 352 if (status) 353 goto out; 354 355 status = nfsd4_check_open_attributes(rqstp, cstate, open); 356 if (status) 357 goto out; 358 359 /* Openowner is now set, so sequence id will get bumped. Now we need 360 * these checks before we do any creates: */ 361 status = nfserr_grace; 362 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 363 goto out; 364 status = nfserr_no_grace; 365 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 366 goto out; 367 368 switch (open->op_claim_type) { 369 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 370 case NFS4_OPEN_CLAIM_NULL: 371 status = do_open_lookup(rqstp, &cstate->current_fh, 372 open); 373 if (status) 374 goto out; 375 break; 376 case NFS4_OPEN_CLAIM_PREVIOUS: 377 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 378 status = nfs4_check_open_reclaim(&open->op_clientid, 379 cstate->minorversion, 380 nn); 381 if (status) 382 goto out; 383 case NFS4_OPEN_CLAIM_FH: 384 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 385 status = do_open_fhandle(rqstp, &cstate->current_fh, 386 open); 387 if (status) 388 goto out; 389 break; 390 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 391 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 392 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 393 dprintk("NFSD: unsupported OPEN claim type %d\n", 394 open->op_claim_type); 395 status = nfserr_notsupp; 396 goto out; 397 default: 398 dprintk("NFSD: Invalid OPEN claim type %d\n", 399 open->op_claim_type); 400 status = nfserr_inval; 401 goto out; 402 } 403 /* 404 * nfsd4_process_open2() does the actual opening of the file. If 405 * successful, it (1) truncates the file if open->op_truncate was 406 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 407 */ 408 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open); 409 WARN_ON(status && open->op_created); 410 out: 411 nfsd4_cleanup_open_state(open, status); 412 if (open->op_openowner) 413 cstate->replay_owner = &open->op_openowner->oo_owner; 414 else 415 nfs4_unlock_state(); 416 return status; 417 } 418 419 /* 420 * filehandle-manipulating ops. 421 */ 422 static __be32 423 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 424 struct svc_fh **getfh) 425 { 426 if (!cstate->current_fh.fh_dentry) 427 return nfserr_nofilehandle; 428 429 *getfh = &cstate->current_fh; 430 return nfs_ok; 431 } 432 433 static __be32 434 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 435 struct nfsd4_putfh *putfh) 436 { 437 fh_put(&cstate->current_fh); 438 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 439 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 440 putfh->pf_fhlen); 441 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 442 } 443 444 static __be32 445 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 446 void *arg) 447 { 448 __be32 status; 449 450 fh_put(&cstate->current_fh); 451 status = exp_pseudoroot(rqstp, &cstate->current_fh); 452 return status; 453 } 454 455 static __be32 456 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 457 void *arg) 458 { 459 if (!cstate->save_fh.fh_dentry) 460 return nfserr_restorefh; 461 462 fh_dup2(&cstate->current_fh, &cstate->save_fh); 463 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 464 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 465 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 466 } 467 return nfs_ok; 468 } 469 470 static __be32 471 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 472 void *arg) 473 { 474 if (!cstate->current_fh.fh_dentry) 475 return nfserr_nofilehandle; 476 477 fh_dup2(&cstate->save_fh, &cstate->current_fh); 478 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 479 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 480 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 481 } 482 return nfs_ok; 483 } 484 485 /* 486 * misc nfsv4 ops 487 */ 488 static __be32 489 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 490 struct nfsd4_access *access) 491 { 492 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 493 return nfserr_inval; 494 495 access->ac_resp_access = access->ac_req_access; 496 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 497 &access->ac_supported); 498 } 499 500 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 501 { 502 __be32 verf[2]; 503 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 504 505 verf[0] = (__be32)nn->nfssvc_boot.tv_sec; 506 verf[1] = (__be32)nn->nfssvc_boot.tv_usec; 507 memcpy(verifier->data, verf, sizeof(verifier->data)); 508 } 509 510 static __be32 511 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 512 struct nfsd4_commit *commit) 513 { 514 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 515 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 516 commit->co_count); 517 } 518 519 static __be32 520 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 521 struct nfsd4_create *create) 522 { 523 struct svc_fh resfh; 524 __be32 status; 525 dev_t rdev; 526 527 fh_init(&resfh, NFS4_FHSIZE); 528 529 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 530 NFSD_MAY_CREATE); 531 if (status) 532 return status; 533 534 status = check_attr_support(rqstp, cstate, create->cr_bmval, 535 nfsd_attrmask); 536 if (status) 537 return status; 538 539 switch (create->cr_type) { 540 case NF4LNK: 541 /* ugh! we have to null-terminate the linktext, or 542 * vfs_symlink() will choke. it is always safe to 543 * null-terminate by brute force, since at worst we 544 * will overwrite the first byte of the create namelen 545 * in the XDR buffer, which has already been extracted 546 * during XDR decode. 547 */ 548 create->cr_linkname[create->cr_linklen] = 0; 549 550 status = nfsd_symlink(rqstp, &cstate->current_fh, 551 create->cr_name, create->cr_namelen, 552 create->cr_linkname, create->cr_linklen, 553 &resfh, &create->cr_iattr); 554 break; 555 556 case NF4BLK: 557 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 558 if (MAJOR(rdev) != create->cr_specdata1 || 559 MINOR(rdev) != create->cr_specdata2) 560 return nfserr_inval; 561 status = nfsd_create(rqstp, &cstate->current_fh, 562 create->cr_name, create->cr_namelen, 563 &create->cr_iattr, S_IFBLK, rdev, &resfh); 564 break; 565 566 case NF4CHR: 567 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 568 if (MAJOR(rdev) != create->cr_specdata1 || 569 MINOR(rdev) != create->cr_specdata2) 570 return nfserr_inval; 571 status = nfsd_create(rqstp, &cstate->current_fh, 572 create->cr_name, create->cr_namelen, 573 &create->cr_iattr,S_IFCHR, rdev, &resfh); 574 break; 575 576 case NF4SOCK: 577 status = nfsd_create(rqstp, &cstate->current_fh, 578 create->cr_name, create->cr_namelen, 579 &create->cr_iattr, S_IFSOCK, 0, &resfh); 580 break; 581 582 case NF4FIFO: 583 status = nfsd_create(rqstp, &cstate->current_fh, 584 create->cr_name, create->cr_namelen, 585 &create->cr_iattr, S_IFIFO, 0, &resfh); 586 break; 587 588 case NF4DIR: 589 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 590 status = nfsd_create(rqstp, &cstate->current_fh, 591 create->cr_name, create->cr_namelen, 592 &create->cr_iattr, S_IFDIR, 0, &resfh); 593 break; 594 595 default: 596 status = nfserr_badtype; 597 } 598 599 if (status) 600 goto out; 601 602 if (create->cr_acl != NULL) 603 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 604 create->cr_bmval); 605 606 fh_unlock(&cstate->current_fh); 607 set_change_info(&create->cr_cinfo, &cstate->current_fh); 608 fh_dup2(&cstate->current_fh, &resfh); 609 out: 610 fh_put(&resfh); 611 return status; 612 } 613 614 static __be32 615 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 616 struct nfsd4_getattr *getattr) 617 { 618 __be32 status; 619 620 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 621 if (status) 622 return status; 623 624 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 625 return nfserr_inval; 626 627 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 628 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 629 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 630 631 getattr->ga_fhp = &cstate->current_fh; 632 return nfs_ok; 633 } 634 635 static __be32 636 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 637 struct nfsd4_link *link) 638 { 639 __be32 status = nfserr_nofilehandle; 640 641 if (!cstate->save_fh.fh_dentry) 642 return status; 643 status = nfsd_link(rqstp, &cstate->current_fh, 644 link->li_name, link->li_namelen, &cstate->save_fh); 645 if (!status) 646 set_change_info(&link->li_cinfo, &cstate->current_fh); 647 return status; 648 } 649 650 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 651 { 652 struct svc_fh tmp_fh; 653 __be32 ret; 654 655 fh_init(&tmp_fh, NFS4_FHSIZE); 656 ret = exp_pseudoroot(rqstp, &tmp_fh); 657 if (ret) 658 return ret; 659 if (tmp_fh.fh_dentry == fh->fh_dentry) { 660 fh_put(&tmp_fh); 661 return nfserr_noent; 662 } 663 fh_put(&tmp_fh); 664 return nfsd_lookup(rqstp, fh, "..", 2, fh); 665 } 666 667 static __be32 668 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 669 void *arg) 670 { 671 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 672 } 673 674 static __be32 675 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 676 struct nfsd4_lookup *lookup) 677 { 678 return nfsd_lookup(rqstp, &cstate->current_fh, 679 lookup->lo_name, lookup->lo_len, 680 &cstate->current_fh); 681 } 682 683 static __be32 684 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 685 struct nfsd4_read *read) 686 { 687 __be32 status; 688 689 /* no need to check permission - this will be done in nfsd_read() */ 690 691 read->rd_filp = NULL; 692 if (read->rd_offset >= OFFSET_MAX) 693 return nfserr_inval; 694 695 /* 696 * If we do a zero copy read, then a client will see read data 697 * that reflects the state of the file *after* performing the 698 * following compound. 699 * 700 * To ensure proper ordering, we therefore turn off zero copy if 701 * the client wants us to do more in this compound: 702 */ 703 if (!nfsd4_last_compound_op(rqstp)) 704 rqstp->rq_splice_ok = false; 705 706 nfs4_lock_state(); 707 /* check stateid */ 708 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 709 cstate, &read->rd_stateid, 710 RD_STATE, &read->rd_filp))) { 711 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 712 goto out; 713 } 714 if (read->rd_filp) 715 get_file(read->rd_filp); 716 status = nfs_ok; 717 out: 718 nfs4_unlock_state(); 719 read->rd_rqstp = rqstp; 720 read->rd_fhp = &cstate->current_fh; 721 return status; 722 } 723 724 static __be32 725 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 726 struct nfsd4_readdir *readdir) 727 { 728 u64 cookie = readdir->rd_cookie; 729 static const nfs4_verifier zeroverf; 730 731 /* no need to check permission - this will be done in nfsd_readdir() */ 732 733 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 734 return nfserr_inval; 735 736 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 737 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 738 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 739 740 if ((cookie == 1) || (cookie == 2) || 741 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 742 return nfserr_bad_cookie; 743 744 readdir->rd_rqstp = rqstp; 745 readdir->rd_fhp = &cstate->current_fh; 746 return nfs_ok; 747 } 748 749 static __be32 750 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 751 struct nfsd4_readlink *readlink) 752 { 753 readlink->rl_rqstp = rqstp; 754 readlink->rl_fhp = &cstate->current_fh; 755 return nfs_ok; 756 } 757 758 static __be32 759 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 760 struct nfsd4_remove *remove) 761 { 762 __be32 status; 763 764 if (locks_in_grace(SVC_NET(rqstp))) 765 return nfserr_grace; 766 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 767 remove->rm_name, remove->rm_namelen); 768 if (!status) { 769 fh_unlock(&cstate->current_fh); 770 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 771 } 772 return status; 773 } 774 775 static __be32 776 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 777 struct nfsd4_rename *rename) 778 { 779 __be32 status = nfserr_nofilehandle; 780 781 if (!cstate->save_fh.fh_dentry) 782 return status; 783 if (locks_in_grace(SVC_NET(rqstp)) && 784 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 785 return nfserr_grace; 786 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 787 rename->rn_snamelen, &cstate->current_fh, 788 rename->rn_tname, rename->rn_tnamelen); 789 790 /* the underlying filesystem returns different error's than required 791 * by NFSv4. both save_fh and current_fh have been verified.. */ 792 if (status == nfserr_isdir) 793 status = nfserr_exist; 794 else if ((status == nfserr_notdir) && 795 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) && 796 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode))) 797 status = nfserr_exist; 798 799 if (!status) { 800 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 801 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 802 } 803 return status; 804 } 805 806 static __be32 807 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 808 struct nfsd4_secinfo *secinfo) 809 { 810 struct svc_fh resfh; 811 struct svc_export *exp; 812 struct dentry *dentry; 813 __be32 err; 814 815 fh_init(&resfh, NFS4_FHSIZE); 816 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 817 if (err) 818 return err; 819 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 820 secinfo->si_name, secinfo->si_namelen, 821 &exp, &dentry); 822 if (err) 823 return err; 824 if (dentry->d_inode == NULL) { 825 exp_put(exp); 826 err = nfserr_noent; 827 } else 828 secinfo->si_exp = exp; 829 dput(dentry); 830 if (cstate->minorversion) 831 /* See rfc 5661 section 2.6.3.1.1.8 */ 832 fh_put(&cstate->current_fh); 833 return err; 834 } 835 836 static __be32 837 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 838 struct nfsd4_secinfo_no_name *sin) 839 { 840 __be32 err; 841 842 switch (sin->sin_style) { 843 case NFS4_SECINFO_STYLE4_CURRENT_FH: 844 break; 845 case NFS4_SECINFO_STYLE4_PARENT: 846 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 847 if (err) 848 return err; 849 break; 850 default: 851 return nfserr_inval; 852 } 853 exp_get(cstate->current_fh.fh_export); 854 sin->sin_exp = cstate->current_fh.fh_export; 855 fh_put(&cstate->current_fh); 856 return nfs_ok; 857 } 858 859 static __be32 860 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 861 struct nfsd4_setattr *setattr) 862 { 863 __be32 status = nfs_ok; 864 int err; 865 866 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 867 nfs4_lock_state(); 868 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 869 &setattr->sa_stateid, WR_STATE, NULL); 870 nfs4_unlock_state(); 871 if (status) { 872 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 873 return status; 874 } 875 } 876 err = fh_want_write(&cstate->current_fh); 877 if (err) 878 return nfserrno(err); 879 status = nfs_ok; 880 881 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 882 nfsd_attrmask); 883 if (status) 884 goto out; 885 886 if (setattr->sa_acl != NULL) 887 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 888 setattr->sa_acl); 889 if (status) 890 goto out; 891 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 892 0, (time_t)0); 893 out: 894 fh_drop_write(&cstate->current_fh); 895 return status; 896 } 897 898 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 899 { 900 int i = 1; 901 int buflen = write->wr_buflen; 902 903 vec[0].iov_base = write->wr_head.iov_base; 904 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 905 buflen -= vec[0].iov_len; 906 907 while (buflen) { 908 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 909 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 910 buflen -= vec[i].iov_len; 911 i++; 912 } 913 return i; 914 } 915 916 static __be32 917 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 918 struct nfsd4_write *write) 919 { 920 stateid_t *stateid = &write->wr_stateid; 921 struct file *filp = NULL; 922 __be32 status = nfs_ok; 923 unsigned long cnt; 924 int nvecs; 925 926 /* no need to check permission - this will be done in nfsd_write() */ 927 928 if (write->wr_offset >= OFFSET_MAX) 929 return nfserr_inval; 930 931 nfs4_lock_state(); 932 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 933 cstate, stateid, WR_STATE, &filp); 934 if (filp) 935 get_file(filp); 936 nfs4_unlock_state(); 937 938 if (status) { 939 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 940 return status; 941 } 942 943 cnt = write->wr_buflen; 944 write->wr_how_written = write->wr_stable_how; 945 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 946 947 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 948 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 949 950 status = nfsd_write(rqstp, &cstate->current_fh, filp, 951 write->wr_offset, rqstp->rq_vec, nvecs, 952 &cnt, &write->wr_how_written); 953 if (filp) 954 fput(filp); 955 956 write->wr_bytes_written = cnt; 957 958 return status; 959 } 960 961 /* This routine never returns NFS_OK! If there are no other errors, it 962 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 963 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 964 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 965 */ 966 static __be32 967 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 968 struct nfsd4_verify *verify) 969 { 970 __be32 *buf, *p; 971 int count; 972 __be32 status; 973 974 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 975 if (status) 976 return status; 977 978 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 979 if (status) 980 return status; 981 982 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 983 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 984 return nfserr_inval; 985 if (verify->ve_attrlen & 3) 986 return nfserr_inval; 987 988 /* count in words: 989 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 990 */ 991 count = 4 + (verify->ve_attrlen >> 2); 992 buf = kmalloc(count << 2, GFP_KERNEL); 993 if (!buf) 994 return nfserr_jukebox; 995 996 p = buf; 997 status = nfsd4_encode_fattr(&cstate->current_fh, 998 cstate->current_fh.fh_export, 999 cstate->current_fh.fh_dentry, &p, 1000 count, verify->ve_bmval, 1001 rqstp, 0); 1002 1003 /* this means that nfsd4_encode_fattr() ran out of space */ 1004 if (status == nfserr_resource) 1005 status = nfserr_not_same; 1006 if (status) 1007 goto out_kfree; 1008 1009 /* skip bitmap */ 1010 p = buf + 1 + ntohl(buf[0]); 1011 status = nfserr_not_same; 1012 if (ntohl(*p++) != verify->ve_attrlen) 1013 goto out_kfree; 1014 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1015 status = nfserr_same; 1016 1017 out_kfree: 1018 kfree(buf); 1019 return status; 1020 } 1021 1022 static __be32 1023 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1024 struct nfsd4_verify *verify) 1025 { 1026 __be32 status; 1027 1028 status = _nfsd4_verify(rqstp, cstate, verify); 1029 return status == nfserr_not_same ? nfs_ok : status; 1030 } 1031 1032 static __be32 1033 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1034 struct nfsd4_verify *verify) 1035 { 1036 __be32 status; 1037 1038 status = _nfsd4_verify(rqstp, cstate, verify); 1039 return status == nfserr_same ? nfs_ok : status; 1040 } 1041 1042 /* 1043 * NULL call. 1044 */ 1045 static __be32 1046 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1047 { 1048 return nfs_ok; 1049 } 1050 1051 static inline void nfsd4_increment_op_stats(u32 opnum) 1052 { 1053 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1054 nfsdstats.nfs4_opcount[opnum]++; 1055 } 1056 1057 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1058 void *); 1059 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1060 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1061 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1062 1063 enum nfsd4_op_flags { 1064 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1065 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1066 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1067 /* For rfc 5661 section 2.6.3.1.1: */ 1068 OP_HANDLES_WRONGSEC = 1 << 3, 1069 OP_IS_PUTFH_LIKE = 1 << 4, 1070 /* 1071 * These are the ops whose result size we estimate before 1072 * encoding, to avoid performing an op then not being able to 1073 * respond or cache a response. This includes writes and setattrs 1074 * as well as the operations usually called "nonidempotent": 1075 */ 1076 OP_MODIFIES_SOMETHING = 1 << 5, 1077 /* 1078 * Cache compounds containing these ops in the xid-based drc: 1079 * We use the DRC for compounds containing non-idempotent 1080 * operations, *except* those that are 4.1-specific (since 1081 * sessions provide their own EOS), and except for stateful 1082 * operations other than setclientid and setclientid_confirm 1083 * (since sequence numbers provide EOS for open, lock, etc in 1084 * the v4.0 case). 1085 */ 1086 OP_CACHEME = 1 << 6, 1087 /* 1088 * These are ops which clear current state id. 1089 */ 1090 OP_CLEAR_STATEID = 1 << 7, 1091 }; 1092 1093 struct nfsd4_operation { 1094 nfsd4op_func op_func; 1095 u32 op_flags; 1096 char *op_name; 1097 /* Try to get response size before operation */ 1098 nfsd4op_rsize op_rsize_bop; 1099 stateid_getter op_get_currentstateid; 1100 stateid_setter op_set_currentstateid; 1101 }; 1102 1103 static struct nfsd4_operation nfsd4_ops[]; 1104 1105 #ifdef NFSD_DEBUG 1106 static const char *nfsd4_op_name(unsigned opnum); 1107 #endif 1108 1109 /* 1110 * Enforce NFSv4.1 COMPOUND ordering rules: 1111 * 1112 * Also note, enforced elsewhere: 1113 * - SEQUENCE other than as first op results in 1114 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1115 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1116 * (Enforced in nfsd4_bind_conn_to_session().) 1117 * - DESTROY_SESSION must be the final operation in a compound, if 1118 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1119 * (Enforced in nfsd4_destroy_session().) 1120 */ 1121 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1122 { 1123 struct nfsd4_op *op = &args->ops[0]; 1124 1125 /* These ordering requirements don't apply to NFSv4.0: */ 1126 if (args->minorversion == 0) 1127 return nfs_ok; 1128 /* This is weird, but OK, not our problem: */ 1129 if (args->opcnt == 0) 1130 return nfs_ok; 1131 if (op->status == nfserr_op_illegal) 1132 return nfs_ok; 1133 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1134 return nfserr_op_not_in_session; 1135 if (op->opnum == OP_SEQUENCE) 1136 return nfs_ok; 1137 if (args->opcnt != 1) 1138 return nfserr_not_only_op; 1139 return nfs_ok; 1140 } 1141 1142 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1143 { 1144 return &nfsd4_ops[op->opnum]; 1145 } 1146 1147 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1148 { 1149 return OPDESC(op)->op_flags & OP_CACHEME; 1150 } 1151 1152 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1153 { 1154 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1155 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1156 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1157 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1158 struct nfsd4_operation *thisd; 1159 struct nfsd4_operation *nextd; 1160 1161 thisd = OPDESC(this); 1162 /* 1163 * Most ops check wronsec on our own; only the putfh-like ops 1164 * have special rules. 1165 */ 1166 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1167 return false; 1168 /* 1169 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1170 * put-filehandle operation if we're not going to use the 1171 * result: 1172 */ 1173 if (argp->opcnt == resp->opcnt) 1174 return false; 1175 1176 nextd = OPDESC(next); 1177 /* 1178 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1179 * errors themselves as necessary; others should check for them 1180 * now: 1181 */ 1182 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1183 } 1184 1185 /* 1186 * COMPOUND call. 1187 */ 1188 static __be32 1189 nfsd4_proc_compound(struct svc_rqst *rqstp, 1190 struct nfsd4_compoundargs *args, 1191 struct nfsd4_compoundres *resp) 1192 { 1193 struct nfsd4_op *op; 1194 struct nfsd4_operation *opdesc; 1195 struct nfsd4_compound_state *cstate = &resp->cstate; 1196 int slack_bytes; 1197 u32 plen = 0; 1198 __be32 status; 1199 1200 resp->xbuf = &rqstp->rq_res; 1201 resp->p = rqstp->rq_res.head[0].iov_base + 1202 rqstp->rq_res.head[0].iov_len; 1203 resp->tagp = resp->p; 1204 /* reserve space for: taglen, tag, and opcnt */ 1205 resp->p += 2 + XDR_QUADLEN(args->taglen); 1206 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; 1207 resp->taglen = args->taglen; 1208 resp->tag = args->tag; 1209 resp->opcnt = 0; 1210 resp->rqstp = rqstp; 1211 resp->cstate.minorversion = args->minorversion; 1212 resp->cstate.replay_owner = NULL; 1213 resp->cstate.session = NULL; 1214 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); 1215 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); 1216 /* 1217 * Don't use the deferral mechanism for NFSv4; compounds make it 1218 * too hard to avoid non-idempotency problems. 1219 */ 1220 rqstp->rq_usedeferral = 0; 1221 1222 /* 1223 * According to RFC3010, this takes precedence over all other errors. 1224 */ 1225 status = nfserr_minor_vers_mismatch; 1226 if (args->minorversion > nfsd_supported_minorversion) 1227 goto out; 1228 1229 status = nfs41_check_op_ordering(args); 1230 if (status) { 1231 op = &args->ops[0]; 1232 op->status = status; 1233 goto encode_op; 1234 } 1235 1236 while (!status && resp->opcnt < args->opcnt) { 1237 op = &args->ops[resp->opcnt++]; 1238 1239 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1240 resp->opcnt, args->opcnt, op->opnum, 1241 nfsd4_op_name(op->opnum)); 1242 /* 1243 * The XDR decode routines may have pre-set op->status; 1244 * for example, if there is a miscellaneous XDR error 1245 * it will be set to nfserr_bad_xdr. 1246 */ 1247 if (op->status) 1248 goto encode_op; 1249 1250 /* We must be able to encode a successful response to 1251 * this operation, with enough room left over to encode a 1252 * failed response to the next operation. If we don't 1253 * have enough room, fail with ERR_RESOURCE. 1254 */ 1255 slack_bytes = (char *)resp->end - (char *)resp->p; 1256 if (slack_bytes < COMPOUND_SLACK_SPACE 1257 + COMPOUND_ERR_SLACK_SPACE) { 1258 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); 1259 op->status = nfserr_resource; 1260 goto encode_op; 1261 } 1262 1263 opdesc = OPDESC(op); 1264 1265 if (!cstate->current_fh.fh_dentry) { 1266 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1267 op->status = nfserr_nofilehandle; 1268 goto encode_op; 1269 } 1270 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && 1271 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1272 op->status = nfserr_moved; 1273 goto encode_op; 1274 } 1275 1276 /* If op is non-idempotent */ 1277 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1278 plen = opdesc->op_rsize_bop(rqstp, op); 1279 op->status = nfsd4_check_resp_size(resp, plen); 1280 } 1281 1282 if (op->status) 1283 goto encode_op; 1284 1285 if (opdesc->op_func) { 1286 if (opdesc->op_get_currentstateid) 1287 opdesc->op_get_currentstateid(cstate, &op->u); 1288 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1289 } else 1290 BUG_ON(op->status == nfs_ok); 1291 1292 if (!op->status) { 1293 if (opdesc->op_set_currentstateid) 1294 opdesc->op_set_currentstateid(cstate, &op->u); 1295 1296 if (opdesc->op_flags & OP_CLEAR_STATEID) 1297 clear_current_stateid(cstate); 1298 1299 if (need_wrongsec_check(rqstp)) 1300 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp); 1301 } 1302 1303 encode_op: 1304 /* Only from SEQUENCE */ 1305 if (resp->cstate.status == nfserr_replay_cache) { 1306 dprintk("%s NFS4.1 replay from cache\n", __func__); 1307 status = op->status; 1308 goto out; 1309 } 1310 if (op->status == nfserr_replay_me) { 1311 op->replay = &cstate->replay_owner->so_replay; 1312 nfsd4_encode_replay(resp, op); 1313 status = op->status = op->replay->rp_status; 1314 } else { 1315 nfsd4_encode_operation(resp, op); 1316 status = op->status; 1317 } 1318 1319 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1320 args->ops, args->opcnt, resp->opcnt, op->opnum, 1321 be32_to_cpu(status)); 1322 1323 if (cstate->replay_owner) { 1324 nfs4_unlock_state(); 1325 cstate->replay_owner = NULL; 1326 } 1327 /* XXX Ugh, we need to get rid of this kind of special case: */ 1328 if (op->opnum == OP_READ && op->u.read.rd_filp) 1329 fput(op->u.read.rd_filp); 1330 1331 nfsd4_increment_op_stats(op->opnum); 1332 } 1333 1334 resp->cstate.status = status; 1335 fh_put(&resp->cstate.current_fh); 1336 fh_put(&resp->cstate.save_fh); 1337 BUG_ON(resp->cstate.replay_owner); 1338 out: 1339 /* Reset deferral mechanism for RPC deferrals */ 1340 rqstp->rq_usedeferral = 1; 1341 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1342 return status; 1343 } 1344 1345 #define op_encode_hdr_size (2) 1346 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1347 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1348 #define op_encode_change_info_maxsz (5) 1349 #define nfs4_fattr_bitmap_maxsz (4) 1350 1351 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1352 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1353 1354 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1355 1356 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1357 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1358 op_encode_ace_maxsz) 1359 1360 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1361 1362 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1363 { 1364 return (op_encode_hdr_size) * sizeof(__be32); 1365 } 1366 1367 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1368 { 1369 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1370 } 1371 1372 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1373 { 1374 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1375 } 1376 1377 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1378 { 1379 return (op_encode_hdr_size + op_encode_change_info_maxsz 1380 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1381 } 1382 1383 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1384 { 1385 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1386 * sizeof(__be32); 1387 } 1388 1389 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1390 { 1391 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1392 * sizeof(__be32); 1393 } 1394 1395 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1396 { 1397 return (op_encode_hdr_size + op_encode_stateid_maxsz 1398 + op_encode_change_info_maxsz + 1 1399 + nfs4_fattr_bitmap_maxsz 1400 + op_encode_delegation_maxsz) * sizeof(__be32); 1401 } 1402 1403 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1404 { 1405 u32 maxcount = 0, rlen = 0; 1406 1407 maxcount = svc_max_payload(rqstp); 1408 rlen = op->u.read.rd_length; 1409 1410 if (rlen > maxcount) 1411 rlen = maxcount; 1412 1413 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen; 1414 } 1415 1416 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1417 { 1418 u32 rlen = op->u.readdir.rd_maxcount; 1419 1420 if (rlen > PAGE_SIZE) 1421 rlen = PAGE_SIZE; 1422 1423 return (op_encode_hdr_size + op_encode_verifier_maxsz) 1424 * sizeof(__be32) + rlen; 1425 } 1426 1427 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1428 { 1429 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1430 * sizeof(__be32); 1431 } 1432 1433 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1434 { 1435 return (op_encode_hdr_size + op_encode_change_info_maxsz 1436 + op_encode_change_info_maxsz) * sizeof(__be32); 1437 } 1438 1439 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1440 { 1441 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1442 } 1443 1444 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1445 { 1446 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32); 1447 } 1448 1449 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1450 { 1451 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1452 } 1453 1454 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1455 { 1456 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1457 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\ 1458 2 + /*eir_server_owner.so_minor_id */\ 1459 /* eir_server_owner.so_major_id<> */\ 1460 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1461 /* eir_server_scope<> */\ 1462 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1463 1 + /* eir_server_impl_id array length */\ 1464 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1465 } 1466 1467 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1468 { 1469 return (op_encode_hdr_size + \ 1470 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1471 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1472 } 1473 1474 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1475 { 1476 return (op_encode_hdr_size + \ 1477 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1478 2 + /* csr_sequence, csr_flags */\ 1479 op_encode_channel_attrs_maxsz + \ 1480 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1481 } 1482 1483 static struct nfsd4_operation nfsd4_ops[] = { 1484 [OP_ACCESS] = { 1485 .op_func = (nfsd4op_func)nfsd4_access, 1486 .op_name = "OP_ACCESS", 1487 }, 1488 [OP_CLOSE] = { 1489 .op_func = (nfsd4op_func)nfsd4_close, 1490 .op_flags = OP_MODIFIES_SOMETHING, 1491 .op_name = "OP_CLOSE", 1492 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1493 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 1494 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 1495 }, 1496 [OP_COMMIT] = { 1497 .op_func = (nfsd4op_func)nfsd4_commit, 1498 .op_flags = OP_MODIFIES_SOMETHING, 1499 .op_name = "OP_COMMIT", 1500 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 1501 }, 1502 [OP_CREATE] = { 1503 .op_func = (nfsd4op_func)nfsd4_create, 1504 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 1505 .op_name = "OP_CREATE", 1506 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 1507 }, 1508 [OP_DELEGRETURN] = { 1509 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1510 .op_flags = OP_MODIFIES_SOMETHING, 1511 .op_name = "OP_DELEGRETURN", 1512 .op_rsize_bop = nfsd4_only_status_rsize, 1513 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 1514 }, 1515 [OP_GETATTR] = { 1516 .op_func = (nfsd4op_func)nfsd4_getattr, 1517 .op_flags = ALLOWED_ON_ABSENT_FS, 1518 .op_name = "OP_GETATTR", 1519 }, 1520 [OP_GETFH] = { 1521 .op_func = (nfsd4op_func)nfsd4_getfh, 1522 .op_name = "OP_GETFH", 1523 }, 1524 [OP_LINK] = { 1525 .op_func = (nfsd4op_func)nfsd4_link, 1526 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 1527 | OP_CACHEME, 1528 .op_name = "OP_LINK", 1529 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 1530 }, 1531 [OP_LOCK] = { 1532 .op_func = (nfsd4op_func)nfsd4_lock, 1533 .op_flags = OP_MODIFIES_SOMETHING, 1534 .op_name = "OP_LOCK", 1535 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 1536 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 1537 }, 1538 [OP_LOCKT] = { 1539 .op_func = (nfsd4op_func)nfsd4_lockt, 1540 .op_name = "OP_LOCKT", 1541 }, 1542 [OP_LOCKU] = { 1543 .op_func = (nfsd4op_func)nfsd4_locku, 1544 .op_flags = OP_MODIFIES_SOMETHING, 1545 .op_name = "OP_LOCKU", 1546 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1547 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 1548 }, 1549 [OP_LOOKUP] = { 1550 .op_func = (nfsd4op_func)nfsd4_lookup, 1551 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1552 .op_name = "OP_LOOKUP", 1553 }, 1554 [OP_LOOKUPP] = { 1555 .op_func = (nfsd4op_func)nfsd4_lookupp, 1556 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1557 .op_name = "OP_LOOKUPP", 1558 }, 1559 [OP_NVERIFY] = { 1560 .op_func = (nfsd4op_func)nfsd4_nverify, 1561 .op_name = "OP_NVERIFY", 1562 }, 1563 [OP_OPEN] = { 1564 .op_func = (nfsd4op_func)nfsd4_open, 1565 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1566 .op_name = "OP_OPEN", 1567 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 1568 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 1569 }, 1570 [OP_OPEN_CONFIRM] = { 1571 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1572 .op_flags = OP_MODIFIES_SOMETHING, 1573 .op_name = "OP_OPEN_CONFIRM", 1574 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1575 }, 1576 [OP_OPEN_DOWNGRADE] = { 1577 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1578 .op_flags = OP_MODIFIES_SOMETHING, 1579 .op_name = "OP_OPEN_DOWNGRADE", 1580 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1581 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 1582 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 1583 }, 1584 [OP_PUTFH] = { 1585 .op_func = (nfsd4op_func)nfsd4_putfh, 1586 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1587 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1588 | OP_CLEAR_STATEID, 1589 .op_name = "OP_PUTFH", 1590 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1591 }, 1592 [OP_PUTPUBFH] = { 1593 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1594 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1595 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1596 | OP_CLEAR_STATEID, 1597 .op_name = "OP_PUTPUBFH", 1598 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1599 }, 1600 [OP_PUTROOTFH] = { 1601 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1602 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1603 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1604 | OP_CLEAR_STATEID, 1605 .op_name = "OP_PUTROOTFH", 1606 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1607 }, 1608 [OP_READ] = { 1609 .op_func = (nfsd4op_func)nfsd4_read, 1610 .op_flags = OP_MODIFIES_SOMETHING, 1611 .op_name = "OP_READ", 1612 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 1613 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 1614 }, 1615 [OP_READDIR] = { 1616 .op_func = (nfsd4op_func)nfsd4_readdir, 1617 .op_flags = OP_MODIFIES_SOMETHING, 1618 .op_name = "OP_READDIR", 1619 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 1620 }, 1621 [OP_READLINK] = { 1622 .op_func = (nfsd4op_func)nfsd4_readlink, 1623 .op_name = "OP_READLINK", 1624 }, 1625 [OP_REMOVE] = { 1626 .op_func = (nfsd4op_func)nfsd4_remove, 1627 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1628 .op_name = "OP_REMOVE", 1629 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 1630 }, 1631 [OP_RENAME] = { 1632 .op_func = (nfsd4op_func)nfsd4_rename, 1633 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1634 .op_name = "OP_RENAME", 1635 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 1636 }, 1637 [OP_RENEW] = { 1638 .op_func = (nfsd4op_func)nfsd4_renew, 1639 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1640 | OP_MODIFIES_SOMETHING, 1641 .op_name = "OP_RENEW", 1642 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1643 1644 }, 1645 [OP_RESTOREFH] = { 1646 .op_func = (nfsd4op_func)nfsd4_restorefh, 1647 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1648 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 1649 .op_name = "OP_RESTOREFH", 1650 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1651 }, 1652 [OP_SAVEFH] = { 1653 .op_func = (nfsd4op_func)nfsd4_savefh, 1654 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1655 .op_name = "OP_SAVEFH", 1656 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1657 }, 1658 [OP_SECINFO] = { 1659 .op_func = (nfsd4op_func)nfsd4_secinfo, 1660 .op_flags = OP_HANDLES_WRONGSEC, 1661 .op_name = "OP_SECINFO", 1662 }, 1663 [OP_SETATTR] = { 1664 .op_func = (nfsd4op_func)nfsd4_setattr, 1665 .op_name = "OP_SETATTR", 1666 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1667 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 1668 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 1669 }, 1670 [OP_SETCLIENTID] = { 1671 .op_func = (nfsd4op_func)nfsd4_setclientid, 1672 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1673 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1674 .op_name = "OP_SETCLIENTID", 1675 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 1676 }, 1677 [OP_SETCLIENTID_CONFIRM] = { 1678 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1679 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1680 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1681 .op_name = "OP_SETCLIENTID_CONFIRM", 1682 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1683 }, 1684 [OP_VERIFY] = { 1685 .op_func = (nfsd4op_func)nfsd4_verify, 1686 .op_name = "OP_VERIFY", 1687 }, 1688 [OP_WRITE] = { 1689 .op_func = (nfsd4op_func)nfsd4_write, 1690 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1691 .op_name = "OP_WRITE", 1692 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 1693 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 1694 }, 1695 [OP_RELEASE_LOCKOWNER] = { 1696 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1697 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1698 | OP_MODIFIES_SOMETHING, 1699 .op_name = "OP_RELEASE_LOCKOWNER", 1700 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1701 }, 1702 1703 /* NFSv4.1 operations */ 1704 [OP_EXCHANGE_ID] = { 1705 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1706 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1707 | OP_MODIFIES_SOMETHING, 1708 .op_name = "OP_EXCHANGE_ID", 1709 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 1710 }, 1711 [OP_BACKCHANNEL_CTL] = { 1712 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 1713 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1714 .op_name = "OP_BACKCHANNEL_CTL", 1715 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1716 }, 1717 [OP_BIND_CONN_TO_SESSION] = { 1718 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 1719 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1720 | OP_MODIFIES_SOMETHING, 1721 .op_name = "OP_BIND_CONN_TO_SESSION", 1722 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 1723 }, 1724 [OP_CREATE_SESSION] = { 1725 .op_func = (nfsd4op_func)nfsd4_create_session, 1726 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1727 | OP_MODIFIES_SOMETHING, 1728 .op_name = "OP_CREATE_SESSION", 1729 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 1730 }, 1731 [OP_DESTROY_SESSION] = { 1732 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1733 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1734 | OP_MODIFIES_SOMETHING, 1735 .op_name = "OP_DESTROY_SESSION", 1736 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1737 }, 1738 [OP_SEQUENCE] = { 1739 .op_func = (nfsd4op_func)nfsd4_sequence, 1740 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1741 .op_name = "OP_SEQUENCE", 1742 }, 1743 [OP_DESTROY_CLIENTID] = { 1744 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 1745 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1746 | OP_MODIFIES_SOMETHING, 1747 .op_name = "OP_DESTROY_CLIENTID", 1748 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1749 }, 1750 [OP_RECLAIM_COMPLETE] = { 1751 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 1752 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1753 .op_name = "OP_RECLAIM_COMPLETE", 1754 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1755 }, 1756 [OP_SECINFO_NO_NAME] = { 1757 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 1758 .op_flags = OP_HANDLES_WRONGSEC, 1759 .op_name = "OP_SECINFO_NO_NAME", 1760 }, 1761 [OP_TEST_STATEID] = { 1762 .op_func = (nfsd4op_func)nfsd4_test_stateid, 1763 .op_flags = ALLOWED_WITHOUT_FH, 1764 .op_name = "OP_TEST_STATEID", 1765 }, 1766 [OP_FREE_STATEID] = { 1767 .op_func = (nfsd4op_func)nfsd4_free_stateid, 1768 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1769 .op_name = "OP_FREE_STATEID", 1770 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 1771 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1772 }, 1773 }; 1774 1775 #ifdef NFSD_DEBUG 1776 static const char *nfsd4_op_name(unsigned opnum) 1777 { 1778 if (opnum < ARRAY_SIZE(nfsd4_ops)) 1779 return nfsd4_ops[opnum].op_name; 1780 return "unknown_operation"; 1781 } 1782 #endif 1783 1784 #define nfsd4_voidres nfsd4_voidargs 1785 struct nfsd4_voidargs { int dummy; }; 1786 1787 static struct svc_procedure nfsd_procedures4[2] = { 1788 [NFSPROC4_NULL] = { 1789 .pc_func = (svc_procfunc) nfsd4_proc_null, 1790 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 1791 .pc_argsize = sizeof(struct nfsd4_voidargs), 1792 .pc_ressize = sizeof(struct nfsd4_voidres), 1793 .pc_cachetype = RC_NOCACHE, 1794 .pc_xdrressize = 1, 1795 }, 1796 [NFSPROC4_COMPOUND] = { 1797 .pc_func = (svc_procfunc) nfsd4_proc_compound, 1798 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 1799 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 1800 .pc_argsize = sizeof(struct nfsd4_compoundargs), 1801 .pc_ressize = sizeof(struct nfsd4_compoundres), 1802 .pc_release = nfsd4_release_compoundargs, 1803 .pc_cachetype = RC_NOCACHE, 1804 .pc_xdrressize = NFSD_BUFSIZE/4, 1805 }, 1806 }; 1807 1808 struct svc_version nfsd_version4 = { 1809 .vs_vers = 4, 1810 .vs_nproc = 2, 1811 .vs_proc = nfsd_procedures4, 1812 .vs_dispatch = nfsd_dispatch, 1813 .vs_xdrsize = NFS4_SVC_XDRSIZE, 1814 }; 1815 1816 /* 1817 * Local variables: 1818 * c-basic-offset: 8 1819 * End: 1820 */ 1821