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() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 358 goto out; 359 status = nfserr_no_grace; 360 if (!locks_in_grace() && 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); 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(cstate, &read->rd_stateid, 690 RD_STATE, &read->rd_filp))) { 691 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 692 goto out; 693 } 694 if (read->rd_filp) 695 get_file(read->rd_filp); 696 status = nfs_ok; 697 out: 698 nfs4_unlock_state(); 699 read->rd_rqstp = rqstp; 700 read->rd_fhp = &cstate->current_fh; 701 return status; 702 } 703 704 static __be32 705 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 706 struct nfsd4_readdir *readdir) 707 { 708 u64 cookie = readdir->rd_cookie; 709 static const nfs4_verifier zeroverf; 710 711 /* no need to check permission - this will be done in nfsd_readdir() */ 712 713 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 714 return nfserr_inval; 715 716 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 717 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 718 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 719 720 if ((cookie == 1) || (cookie == 2) || 721 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 722 return nfserr_bad_cookie; 723 724 readdir->rd_rqstp = rqstp; 725 readdir->rd_fhp = &cstate->current_fh; 726 return nfs_ok; 727 } 728 729 static __be32 730 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 731 struct nfsd4_readlink *readlink) 732 { 733 readlink->rl_rqstp = rqstp; 734 readlink->rl_fhp = &cstate->current_fh; 735 return nfs_ok; 736 } 737 738 static __be32 739 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 740 struct nfsd4_remove *remove) 741 { 742 __be32 status; 743 744 if (locks_in_grace()) 745 return nfserr_grace; 746 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 747 remove->rm_name, remove->rm_namelen); 748 if (!status) { 749 fh_unlock(&cstate->current_fh); 750 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 751 } 752 return status; 753 } 754 755 static __be32 756 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 757 struct nfsd4_rename *rename) 758 { 759 __be32 status = nfserr_nofilehandle; 760 761 if (!cstate->save_fh.fh_dentry) 762 return status; 763 if (locks_in_grace() && !(cstate->save_fh.fh_export->ex_flags 764 & NFSEXP_NOSUBTREECHECK)) 765 return nfserr_grace; 766 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 767 rename->rn_snamelen, &cstate->current_fh, 768 rename->rn_tname, rename->rn_tnamelen); 769 770 /* the underlying filesystem returns different error's than required 771 * by NFSv4. both save_fh and current_fh have been verified.. */ 772 if (status == nfserr_isdir) 773 status = nfserr_exist; 774 else if ((status == nfserr_notdir) && 775 (S_ISDIR(cstate->save_fh.fh_dentry->d_inode->i_mode) && 776 S_ISDIR(cstate->current_fh.fh_dentry->d_inode->i_mode))) 777 status = nfserr_exist; 778 779 if (!status) { 780 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 781 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 782 } 783 return status; 784 } 785 786 static __be32 787 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 788 struct nfsd4_secinfo *secinfo) 789 { 790 struct svc_fh resfh; 791 struct svc_export *exp; 792 struct dentry *dentry; 793 __be32 err; 794 795 fh_init(&resfh, NFS4_FHSIZE); 796 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 797 if (err) 798 return err; 799 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 800 secinfo->si_name, secinfo->si_namelen, 801 &exp, &dentry); 802 if (err) 803 return err; 804 if (dentry->d_inode == NULL) { 805 exp_put(exp); 806 err = nfserr_noent; 807 } else 808 secinfo->si_exp = exp; 809 dput(dentry); 810 if (cstate->minorversion) 811 /* See rfc 5661 section 2.6.3.1.1.8 */ 812 fh_put(&cstate->current_fh); 813 return err; 814 } 815 816 static __be32 817 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 818 struct nfsd4_secinfo_no_name *sin) 819 { 820 __be32 err; 821 822 switch (sin->sin_style) { 823 case NFS4_SECINFO_STYLE4_CURRENT_FH: 824 break; 825 case NFS4_SECINFO_STYLE4_PARENT: 826 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 827 if (err) 828 return err; 829 break; 830 default: 831 return nfserr_inval; 832 } 833 exp_get(cstate->current_fh.fh_export); 834 sin->sin_exp = cstate->current_fh.fh_export; 835 fh_put(&cstate->current_fh); 836 return nfs_ok; 837 } 838 839 static __be32 840 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 841 struct nfsd4_setattr *setattr) 842 { 843 __be32 status = nfs_ok; 844 int err; 845 846 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 847 nfs4_lock_state(); 848 status = nfs4_preprocess_stateid_op(cstate, 849 &setattr->sa_stateid, WR_STATE, NULL); 850 nfs4_unlock_state(); 851 if (status) { 852 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 853 return status; 854 } 855 } 856 err = fh_want_write(&cstate->current_fh); 857 if (err) 858 return nfserrno(err); 859 status = nfs_ok; 860 861 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 862 nfsd_attrmask); 863 if (status) 864 goto out; 865 866 if (setattr->sa_acl != NULL) 867 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 868 setattr->sa_acl); 869 if (status) 870 goto out; 871 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 872 0, (time_t)0); 873 out: 874 fh_drop_write(&cstate->current_fh); 875 return status; 876 } 877 878 static __be32 879 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 880 struct nfsd4_write *write) 881 { 882 stateid_t *stateid = &write->wr_stateid; 883 struct file *filp = NULL; 884 __be32 status = nfs_ok; 885 unsigned long cnt; 886 887 /* no need to check permission - this will be done in nfsd_write() */ 888 889 if (write->wr_offset >= OFFSET_MAX) 890 return nfserr_inval; 891 892 nfs4_lock_state(); 893 status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp); 894 if (filp) 895 get_file(filp); 896 nfs4_unlock_state(); 897 898 if (status) { 899 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 900 return status; 901 } 902 903 cnt = write->wr_buflen; 904 write->wr_how_written = write->wr_stable_how; 905 gen_boot_verifier(&write->wr_verifier); 906 907 status = nfsd_write(rqstp, &cstate->current_fh, filp, 908 write->wr_offset, rqstp->rq_vec, write->wr_vlen, 909 &cnt, &write->wr_how_written); 910 if (filp) 911 fput(filp); 912 913 write->wr_bytes_written = cnt; 914 915 return status; 916 } 917 918 /* This routine never returns NFS_OK! If there are no other errors, it 919 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 920 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 921 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 922 */ 923 static __be32 924 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 925 struct nfsd4_verify *verify) 926 { 927 __be32 *buf, *p; 928 int count; 929 __be32 status; 930 931 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 932 if (status) 933 return status; 934 935 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 936 if (status) 937 return status; 938 939 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 940 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 941 return nfserr_inval; 942 if (verify->ve_attrlen & 3) 943 return nfserr_inval; 944 945 /* count in words: 946 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 947 */ 948 count = 4 + (verify->ve_attrlen >> 2); 949 buf = kmalloc(count << 2, GFP_KERNEL); 950 if (!buf) 951 return nfserr_jukebox; 952 953 status = nfsd4_encode_fattr(&cstate->current_fh, 954 cstate->current_fh.fh_export, 955 cstate->current_fh.fh_dentry, buf, 956 &count, verify->ve_bmval, 957 rqstp, 0); 958 959 /* this means that nfsd4_encode_fattr() ran out of space */ 960 if (status == nfserr_resource && count == 0) 961 status = nfserr_not_same; 962 if (status) 963 goto out_kfree; 964 965 /* skip bitmap */ 966 p = buf + 1 + ntohl(buf[0]); 967 status = nfserr_not_same; 968 if (ntohl(*p++) != verify->ve_attrlen) 969 goto out_kfree; 970 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 971 status = nfserr_same; 972 973 out_kfree: 974 kfree(buf); 975 return status; 976 } 977 978 static __be32 979 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 980 struct nfsd4_verify *verify) 981 { 982 __be32 status; 983 984 status = _nfsd4_verify(rqstp, cstate, verify); 985 return status == nfserr_not_same ? nfs_ok : status; 986 } 987 988 static __be32 989 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 990 struct nfsd4_verify *verify) 991 { 992 __be32 status; 993 994 status = _nfsd4_verify(rqstp, cstate, verify); 995 return status == nfserr_same ? nfs_ok : status; 996 } 997 998 /* 999 * NULL call. 1000 */ 1001 static __be32 1002 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1003 { 1004 return nfs_ok; 1005 } 1006 1007 static inline void nfsd4_increment_op_stats(u32 opnum) 1008 { 1009 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1010 nfsdstats.nfs4_opcount[opnum]++; 1011 } 1012 1013 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1014 void *); 1015 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1016 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1017 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1018 1019 enum nfsd4_op_flags { 1020 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1021 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1022 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1023 /* For rfc 5661 section 2.6.3.1.1: */ 1024 OP_HANDLES_WRONGSEC = 1 << 3, 1025 OP_IS_PUTFH_LIKE = 1 << 4, 1026 /* 1027 * These are the ops whose result size we estimate before 1028 * encoding, to avoid performing an op then not being able to 1029 * respond or cache a response. This includes writes and setattrs 1030 * as well as the operations usually called "nonidempotent": 1031 */ 1032 OP_MODIFIES_SOMETHING = 1 << 5, 1033 /* 1034 * Cache compounds containing these ops in the xid-based drc: 1035 * We use the DRC for compounds containing non-idempotent 1036 * operations, *except* those that are 4.1-specific (since 1037 * sessions provide their own EOS), and except for stateful 1038 * operations other than setclientid and setclientid_confirm 1039 * (since sequence numbers provide EOS for open, lock, etc in 1040 * the v4.0 case). 1041 */ 1042 OP_CACHEME = 1 << 6, 1043 /* 1044 * These are ops which clear current state id. 1045 */ 1046 OP_CLEAR_STATEID = 1 << 7, 1047 }; 1048 1049 struct nfsd4_operation { 1050 nfsd4op_func op_func; 1051 u32 op_flags; 1052 char *op_name; 1053 /* Try to get response size before operation */ 1054 nfsd4op_rsize op_rsize_bop; 1055 stateid_setter op_get_currentstateid; 1056 stateid_getter op_set_currentstateid; 1057 }; 1058 1059 static struct nfsd4_operation nfsd4_ops[]; 1060 1061 #ifdef NFSD_DEBUG 1062 static const char *nfsd4_op_name(unsigned opnum); 1063 #endif 1064 1065 /* 1066 * Enforce NFSv4.1 COMPOUND ordering rules: 1067 * 1068 * Also note, enforced elsewhere: 1069 * - SEQUENCE other than as first op results in 1070 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1071 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1072 * (Enforced in nfsd4_bind_conn_to_session().) 1073 * - DESTROY_SESSION must be the final operation in a compound, if 1074 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1075 * (Enforced in nfsd4_destroy_session().) 1076 */ 1077 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1078 { 1079 struct nfsd4_op *op = &args->ops[0]; 1080 1081 /* These ordering requirements don't apply to NFSv4.0: */ 1082 if (args->minorversion == 0) 1083 return nfs_ok; 1084 /* This is weird, but OK, not our problem: */ 1085 if (args->opcnt == 0) 1086 return nfs_ok; 1087 if (op->status == nfserr_op_illegal) 1088 return nfs_ok; 1089 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1090 return nfserr_op_not_in_session; 1091 if (op->opnum == OP_SEQUENCE) 1092 return nfs_ok; 1093 if (args->opcnt != 1) 1094 return nfserr_not_only_op; 1095 return nfs_ok; 1096 } 1097 1098 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1099 { 1100 return &nfsd4_ops[op->opnum]; 1101 } 1102 1103 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1104 { 1105 return OPDESC(op)->op_flags & OP_CACHEME; 1106 } 1107 1108 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1109 { 1110 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1111 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1112 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1113 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1114 struct nfsd4_operation *thisd; 1115 struct nfsd4_operation *nextd; 1116 1117 thisd = OPDESC(this); 1118 /* 1119 * Most ops check wronsec on our own; only the putfh-like ops 1120 * have special rules. 1121 */ 1122 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1123 return false; 1124 /* 1125 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1126 * put-filehandle operation if we're not going to use the 1127 * result: 1128 */ 1129 if (argp->opcnt == resp->opcnt) 1130 return false; 1131 1132 nextd = OPDESC(next); 1133 /* 1134 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1135 * errors themselves as necessary; others should check for them 1136 * now: 1137 */ 1138 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1139 } 1140 1141 /* 1142 * COMPOUND call. 1143 */ 1144 static __be32 1145 nfsd4_proc_compound(struct svc_rqst *rqstp, 1146 struct nfsd4_compoundargs *args, 1147 struct nfsd4_compoundres *resp) 1148 { 1149 struct nfsd4_op *op; 1150 struct nfsd4_operation *opdesc; 1151 struct nfsd4_compound_state *cstate = &resp->cstate; 1152 int slack_bytes; 1153 u32 plen = 0; 1154 __be32 status; 1155 1156 resp->xbuf = &rqstp->rq_res; 1157 resp->p = rqstp->rq_res.head[0].iov_base + 1158 rqstp->rq_res.head[0].iov_len; 1159 resp->tagp = resp->p; 1160 /* reserve space for: taglen, tag, and opcnt */ 1161 resp->p += 2 + XDR_QUADLEN(args->taglen); 1162 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; 1163 resp->taglen = args->taglen; 1164 resp->tag = args->tag; 1165 resp->opcnt = 0; 1166 resp->rqstp = rqstp; 1167 resp->cstate.minorversion = args->minorversion; 1168 resp->cstate.replay_owner = NULL; 1169 resp->cstate.session = NULL; 1170 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); 1171 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); 1172 /* 1173 * Don't use the deferral mechanism for NFSv4; compounds make it 1174 * too hard to avoid non-idempotency problems. 1175 */ 1176 rqstp->rq_usedeferral = 0; 1177 1178 /* 1179 * According to RFC3010, this takes precedence over all other errors. 1180 */ 1181 status = nfserr_minor_vers_mismatch; 1182 if (args->minorversion > nfsd_supported_minorversion) 1183 goto out; 1184 1185 status = nfs41_check_op_ordering(args); 1186 if (status) { 1187 op = &args->ops[0]; 1188 op->status = status; 1189 goto encode_op; 1190 } 1191 1192 while (!status && resp->opcnt < args->opcnt) { 1193 op = &args->ops[resp->opcnt++]; 1194 1195 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1196 resp->opcnt, args->opcnt, op->opnum, 1197 nfsd4_op_name(op->opnum)); 1198 /* 1199 * The XDR decode routines may have pre-set op->status; 1200 * for example, if there is a miscellaneous XDR error 1201 * it will be set to nfserr_bad_xdr. 1202 */ 1203 if (op->status) 1204 goto encode_op; 1205 1206 /* We must be able to encode a successful response to 1207 * this operation, with enough room left over to encode a 1208 * failed response to the next operation. If we don't 1209 * have enough room, fail with ERR_RESOURCE. 1210 */ 1211 slack_bytes = (char *)resp->end - (char *)resp->p; 1212 if (slack_bytes < COMPOUND_SLACK_SPACE 1213 + COMPOUND_ERR_SLACK_SPACE) { 1214 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); 1215 op->status = nfserr_resource; 1216 goto encode_op; 1217 } 1218 1219 opdesc = OPDESC(op); 1220 1221 if (!cstate->current_fh.fh_dentry) { 1222 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1223 op->status = nfserr_nofilehandle; 1224 goto encode_op; 1225 } 1226 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && 1227 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1228 op->status = nfserr_moved; 1229 goto encode_op; 1230 } 1231 1232 /* If op is non-idempotent */ 1233 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1234 plen = opdesc->op_rsize_bop(rqstp, op); 1235 op->status = nfsd4_check_resp_size(resp, plen); 1236 } 1237 1238 if (op->status) 1239 goto encode_op; 1240 1241 if (opdesc->op_func) { 1242 if (opdesc->op_get_currentstateid) 1243 opdesc->op_get_currentstateid(cstate, &op->u); 1244 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1245 } else 1246 BUG_ON(op->status == nfs_ok); 1247 1248 if (!op->status) { 1249 if (opdesc->op_set_currentstateid) 1250 opdesc->op_set_currentstateid(cstate, &op->u); 1251 1252 if (opdesc->op_flags & OP_CLEAR_STATEID) 1253 clear_current_stateid(cstate); 1254 1255 if (need_wrongsec_check(rqstp)) 1256 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp); 1257 } 1258 1259 encode_op: 1260 /* Only from SEQUENCE */ 1261 if (resp->cstate.status == nfserr_replay_cache) { 1262 dprintk("%s NFS4.1 replay from cache\n", __func__); 1263 status = op->status; 1264 goto out; 1265 } 1266 if (op->status == nfserr_replay_me) { 1267 op->replay = &cstate->replay_owner->so_replay; 1268 nfsd4_encode_replay(resp, op); 1269 status = op->status = op->replay->rp_status; 1270 } else { 1271 nfsd4_encode_operation(resp, op); 1272 status = op->status; 1273 } 1274 1275 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1276 args->ops, args->opcnt, resp->opcnt, op->opnum, 1277 be32_to_cpu(status)); 1278 1279 if (cstate->replay_owner) { 1280 nfs4_unlock_state(); 1281 cstate->replay_owner = NULL; 1282 } 1283 /* XXX Ugh, we need to get rid of this kind of special case: */ 1284 if (op->opnum == OP_READ && op->u.read.rd_filp) 1285 fput(op->u.read.rd_filp); 1286 1287 nfsd4_increment_op_stats(op->opnum); 1288 } 1289 1290 resp->cstate.status = status; 1291 fh_put(&resp->cstate.current_fh); 1292 fh_put(&resp->cstate.save_fh); 1293 BUG_ON(resp->cstate.replay_owner); 1294 out: 1295 /* Reset deferral mechanism for RPC deferrals */ 1296 rqstp->rq_usedeferral = 1; 1297 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1298 return status; 1299 } 1300 1301 #define op_encode_hdr_size (2) 1302 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1303 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1304 #define op_encode_change_info_maxsz (5) 1305 #define nfs4_fattr_bitmap_maxsz (4) 1306 1307 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1308 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1309 1310 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1311 1312 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1313 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1314 op_encode_ace_maxsz) 1315 1316 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1317 1318 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1319 { 1320 return (op_encode_hdr_size) * sizeof(__be32); 1321 } 1322 1323 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1324 { 1325 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1326 } 1327 1328 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1329 { 1330 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1331 } 1332 1333 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1334 { 1335 return (op_encode_hdr_size + op_encode_change_info_maxsz 1336 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1337 } 1338 1339 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1340 { 1341 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1342 * sizeof(__be32); 1343 } 1344 1345 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1346 { 1347 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1348 * sizeof(__be32); 1349 } 1350 1351 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1352 { 1353 return (op_encode_hdr_size + op_encode_stateid_maxsz 1354 + op_encode_change_info_maxsz + 1 1355 + nfs4_fattr_bitmap_maxsz 1356 + op_encode_delegation_maxsz) * sizeof(__be32); 1357 } 1358 1359 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1360 { 1361 u32 maxcount = 0, rlen = 0; 1362 1363 maxcount = svc_max_payload(rqstp); 1364 rlen = op->u.read.rd_length; 1365 1366 if (rlen > maxcount) 1367 rlen = maxcount; 1368 1369 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen; 1370 } 1371 1372 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1373 { 1374 u32 rlen = op->u.readdir.rd_maxcount; 1375 1376 if (rlen > PAGE_SIZE) 1377 rlen = PAGE_SIZE; 1378 1379 return (op_encode_hdr_size + op_encode_verifier_maxsz) 1380 * sizeof(__be32) + rlen; 1381 } 1382 1383 static inline u32 nfsd4_remove_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_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1390 { 1391 return (op_encode_hdr_size + op_encode_change_info_maxsz 1392 + op_encode_change_info_maxsz) * sizeof(__be32); 1393 } 1394 1395 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1396 { 1397 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1398 } 1399 1400 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1401 { 1402 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32); 1403 } 1404 1405 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1406 { 1407 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1408 } 1409 1410 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1411 { 1412 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1413 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\ 1414 2 + /*eir_server_owner.so_minor_id */\ 1415 /* eir_server_owner.so_major_id<> */\ 1416 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1417 /* eir_server_scope<> */\ 1418 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1419 1 + /* eir_server_impl_id array length */\ 1420 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1421 } 1422 1423 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1424 { 1425 return (op_encode_hdr_size + \ 1426 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1427 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1428 } 1429 1430 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1431 { 1432 return (op_encode_hdr_size + \ 1433 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1434 2 + /* csr_sequence, csr_flags */\ 1435 op_encode_channel_attrs_maxsz + \ 1436 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1437 } 1438 1439 static struct nfsd4_operation nfsd4_ops[] = { 1440 [OP_ACCESS] = { 1441 .op_func = (nfsd4op_func)nfsd4_access, 1442 .op_name = "OP_ACCESS", 1443 }, 1444 [OP_CLOSE] = { 1445 .op_func = (nfsd4op_func)nfsd4_close, 1446 .op_flags = OP_MODIFIES_SOMETHING, 1447 .op_name = "OP_CLOSE", 1448 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1449 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 1450 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 1451 }, 1452 [OP_COMMIT] = { 1453 .op_func = (nfsd4op_func)nfsd4_commit, 1454 .op_flags = OP_MODIFIES_SOMETHING, 1455 .op_name = "OP_COMMIT", 1456 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 1457 }, 1458 [OP_CREATE] = { 1459 .op_func = (nfsd4op_func)nfsd4_create, 1460 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 1461 .op_name = "OP_CREATE", 1462 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 1463 }, 1464 [OP_DELEGRETURN] = { 1465 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1466 .op_flags = OP_MODIFIES_SOMETHING, 1467 .op_name = "OP_DELEGRETURN", 1468 .op_rsize_bop = nfsd4_only_status_rsize, 1469 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 1470 }, 1471 [OP_GETATTR] = { 1472 .op_func = (nfsd4op_func)nfsd4_getattr, 1473 .op_flags = ALLOWED_ON_ABSENT_FS, 1474 .op_name = "OP_GETATTR", 1475 }, 1476 [OP_GETFH] = { 1477 .op_func = (nfsd4op_func)nfsd4_getfh, 1478 .op_name = "OP_GETFH", 1479 }, 1480 [OP_LINK] = { 1481 .op_func = (nfsd4op_func)nfsd4_link, 1482 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 1483 | OP_CACHEME, 1484 .op_name = "OP_LINK", 1485 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 1486 }, 1487 [OP_LOCK] = { 1488 .op_func = (nfsd4op_func)nfsd4_lock, 1489 .op_flags = OP_MODIFIES_SOMETHING, 1490 .op_name = "OP_LOCK", 1491 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 1492 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 1493 }, 1494 [OP_LOCKT] = { 1495 .op_func = (nfsd4op_func)nfsd4_lockt, 1496 .op_name = "OP_LOCKT", 1497 }, 1498 [OP_LOCKU] = { 1499 .op_func = (nfsd4op_func)nfsd4_locku, 1500 .op_flags = OP_MODIFIES_SOMETHING, 1501 .op_name = "OP_LOCKU", 1502 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1503 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 1504 }, 1505 [OP_LOOKUP] = { 1506 .op_func = (nfsd4op_func)nfsd4_lookup, 1507 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1508 .op_name = "OP_LOOKUP", 1509 }, 1510 [OP_LOOKUPP] = { 1511 .op_func = (nfsd4op_func)nfsd4_lookupp, 1512 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1513 .op_name = "OP_LOOKUPP", 1514 }, 1515 [OP_NVERIFY] = { 1516 .op_func = (nfsd4op_func)nfsd4_nverify, 1517 .op_name = "OP_NVERIFY", 1518 }, 1519 [OP_OPEN] = { 1520 .op_func = (nfsd4op_func)nfsd4_open, 1521 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1522 .op_name = "OP_OPEN", 1523 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 1524 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 1525 }, 1526 [OP_OPEN_CONFIRM] = { 1527 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1528 .op_flags = OP_MODIFIES_SOMETHING, 1529 .op_name = "OP_OPEN_CONFIRM", 1530 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1531 }, 1532 [OP_OPEN_DOWNGRADE] = { 1533 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1534 .op_flags = OP_MODIFIES_SOMETHING, 1535 .op_name = "OP_OPEN_DOWNGRADE", 1536 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1537 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 1538 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 1539 }, 1540 [OP_PUTFH] = { 1541 .op_func = (nfsd4op_func)nfsd4_putfh, 1542 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1543 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1544 | OP_CLEAR_STATEID, 1545 .op_name = "OP_PUTFH", 1546 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1547 }, 1548 [OP_PUTPUBFH] = { 1549 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1550 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1551 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1552 | OP_CLEAR_STATEID, 1553 .op_name = "OP_PUTPUBFH", 1554 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1555 }, 1556 [OP_PUTROOTFH] = { 1557 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1558 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1559 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1560 | OP_CLEAR_STATEID, 1561 .op_name = "OP_PUTROOTFH", 1562 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1563 }, 1564 [OP_READ] = { 1565 .op_func = (nfsd4op_func)nfsd4_read, 1566 .op_flags = OP_MODIFIES_SOMETHING, 1567 .op_name = "OP_READ", 1568 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 1569 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 1570 }, 1571 [OP_READDIR] = { 1572 .op_func = (nfsd4op_func)nfsd4_readdir, 1573 .op_flags = OP_MODIFIES_SOMETHING, 1574 .op_name = "OP_READDIR", 1575 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 1576 }, 1577 [OP_READLINK] = { 1578 .op_func = (nfsd4op_func)nfsd4_readlink, 1579 .op_name = "OP_READLINK", 1580 }, 1581 [OP_REMOVE] = { 1582 .op_func = (nfsd4op_func)nfsd4_remove, 1583 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1584 .op_name = "OP_REMOVE", 1585 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 1586 }, 1587 [OP_RENAME] = { 1588 .op_func = (nfsd4op_func)nfsd4_rename, 1589 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1590 .op_name = "OP_RENAME", 1591 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 1592 }, 1593 [OP_RENEW] = { 1594 .op_func = (nfsd4op_func)nfsd4_renew, 1595 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1596 | OP_MODIFIES_SOMETHING, 1597 .op_name = "OP_RENEW", 1598 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1599 1600 }, 1601 [OP_RESTOREFH] = { 1602 .op_func = (nfsd4op_func)nfsd4_restorefh, 1603 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1604 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 1605 .op_name = "OP_RESTOREFH", 1606 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1607 }, 1608 [OP_SAVEFH] = { 1609 .op_func = (nfsd4op_func)nfsd4_savefh, 1610 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1611 .op_name = "OP_SAVEFH", 1612 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1613 }, 1614 [OP_SECINFO] = { 1615 .op_func = (nfsd4op_func)nfsd4_secinfo, 1616 .op_flags = OP_HANDLES_WRONGSEC, 1617 .op_name = "OP_SECINFO", 1618 }, 1619 [OP_SETATTR] = { 1620 .op_func = (nfsd4op_func)nfsd4_setattr, 1621 .op_name = "OP_SETATTR", 1622 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1623 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 1624 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 1625 }, 1626 [OP_SETCLIENTID] = { 1627 .op_func = (nfsd4op_func)nfsd4_setclientid, 1628 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1629 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1630 .op_name = "OP_SETCLIENTID", 1631 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 1632 }, 1633 [OP_SETCLIENTID_CONFIRM] = { 1634 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1635 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1636 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1637 .op_name = "OP_SETCLIENTID_CONFIRM", 1638 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1639 }, 1640 [OP_VERIFY] = { 1641 .op_func = (nfsd4op_func)nfsd4_verify, 1642 .op_name = "OP_VERIFY", 1643 }, 1644 [OP_WRITE] = { 1645 .op_func = (nfsd4op_func)nfsd4_write, 1646 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1647 .op_name = "OP_WRITE", 1648 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 1649 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 1650 }, 1651 [OP_RELEASE_LOCKOWNER] = { 1652 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1653 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1654 | OP_MODIFIES_SOMETHING, 1655 .op_name = "OP_RELEASE_LOCKOWNER", 1656 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1657 }, 1658 1659 /* NFSv4.1 operations */ 1660 [OP_EXCHANGE_ID] = { 1661 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1662 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1663 | OP_MODIFIES_SOMETHING, 1664 .op_name = "OP_EXCHANGE_ID", 1665 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 1666 }, 1667 [OP_BIND_CONN_TO_SESSION] = { 1668 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 1669 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1670 | OP_MODIFIES_SOMETHING, 1671 .op_name = "OP_BIND_CONN_TO_SESSION", 1672 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 1673 }, 1674 [OP_CREATE_SESSION] = { 1675 .op_func = (nfsd4op_func)nfsd4_create_session, 1676 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1677 | OP_MODIFIES_SOMETHING, 1678 .op_name = "OP_CREATE_SESSION", 1679 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 1680 }, 1681 [OP_DESTROY_SESSION] = { 1682 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1683 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1684 | OP_MODIFIES_SOMETHING, 1685 .op_name = "OP_DESTROY_SESSION", 1686 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1687 }, 1688 [OP_SEQUENCE] = { 1689 .op_func = (nfsd4op_func)nfsd4_sequence, 1690 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1691 .op_name = "OP_SEQUENCE", 1692 }, 1693 [OP_DESTROY_CLIENTID] = { 1694 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 1695 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1696 | OP_MODIFIES_SOMETHING, 1697 .op_name = "OP_DESTROY_CLIENTID", 1698 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1699 }, 1700 [OP_RECLAIM_COMPLETE] = { 1701 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 1702 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1703 .op_name = "OP_RECLAIM_COMPLETE", 1704 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1705 }, 1706 [OP_SECINFO_NO_NAME] = { 1707 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 1708 .op_flags = OP_HANDLES_WRONGSEC, 1709 .op_name = "OP_SECINFO_NO_NAME", 1710 }, 1711 [OP_TEST_STATEID] = { 1712 .op_func = (nfsd4op_func)nfsd4_test_stateid, 1713 .op_flags = ALLOWED_WITHOUT_FH, 1714 .op_name = "OP_TEST_STATEID", 1715 }, 1716 [OP_FREE_STATEID] = { 1717 .op_func = (nfsd4op_func)nfsd4_free_stateid, 1718 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1719 .op_name = "OP_FREE_STATEID", 1720 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1721 }, 1722 }; 1723 1724 #ifdef NFSD_DEBUG 1725 static const char *nfsd4_op_name(unsigned opnum) 1726 { 1727 if (opnum < ARRAY_SIZE(nfsd4_ops)) 1728 return nfsd4_ops[opnum].op_name; 1729 return "unknown_operation"; 1730 } 1731 #endif 1732 1733 #define nfsd4_voidres nfsd4_voidargs 1734 struct nfsd4_voidargs { int dummy; }; 1735 1736 static struct svc_procedure nfsd_procedures4[2] = { 1737 [NFSPROC4_NULL] = { 1738 .pc_func = (svc_procfunc) nfsd4_proc_null, 1739 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 1740 .pc_argsize = sizeof(struct nfsd4_voidargs), 1741 .pc_ressize = sizeof(struct nfsd4_voidres), 1742 .pc_cachetype = RC_NOCACHE, 1743 .pc_xdrressize = 1, 1744 }, 1745 [NFSPROC4_COMPOUND] = { 1746 .pc_func = (svc_procfunc) nfsd4_proc_compound, 1747 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 1748 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 1749 .pc_argsize = sizeof(struct nfsd4_compoundargs), 1750 .pc_ressize = sizeof(struct nfsd4_compoundres), 1751 .pc_release = nfsd4_release_compoundargs, 1752 .pc_cachetype = RC_NOCACHE, 1753 .pc_xdrressize = NFSD_BUFSIZE/4, 1754 }, 1755 }; 1756 1757 struct svc_version nfsd_version4 = { 1758 .vs_vers = 4, 1759 .vs_nproc = 2, 1760 .vs_proc = nfsd_procedures4, 1761 .vs_dispatch = nfsd_dispatch, 1762 .vs_xdrsize = NFS4_SVC_XDRSIZE, 1763 }; 1764 1765 /* 1766 * Local variables: 1767 * c-basic-offset: 8 1768 * End: 1769 */ 1770