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