1 /* 2 * Server-side procedures for NFSv4. 3 * 4 * Copyright (c) 2002 The Regents of the University of Michigan. 5 * All rights reserved. 6 * 7 * Kendrick Smith <kmsmith@umich.edu> 8 * Andy Adamson <andros@umich.edu> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 #include <linux/file.h> 36 #include <linux/slab.h> 37 38 #include "idmap.h" 39 #include "cache.h" 40 #include "xdr4.h" 41 #include "vfs.h" 42 #include "current_stateid.h" 43 #include "netns.h" 44 45 #define NFSDDBG_FACILITY NFSDDBG_PROC 46 47 static u32 nfsd_attrmask[] = { 48 NFSD_WRITEABLE_ATTRS_WORD0, 49 NFSD_WRITEABLE_ATTRS_WORD1, 50 NFSD_WRITEABLE_ATTRS_WORD2 51 }; 52 53 static u32 nfsd41_ex_attrmask[] = { 54 NFSD_SUPPATTR_EXCLCREAT_WORD0, 55 NFSD_SUPPATTR_EXCLCREAT_WORD1, 56 NFSD_SUPPATTR_EXCLCREAT_WORD2 57 }; 58 59 static __be32 60 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 61 u32 *bmval, u32 *writable) 62 { 63 struct dentry *dentry = cstate->current_fh.fh_dentry; 64 65 /* 66 * Check about attributes are supported by the NFSv4 server or not. 67 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. 68 */ 69 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || 70 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || 71 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) 72 return nfserr_attrnotsupp; 73 74 /* 75 * Check FATTR4_WORD0_ACL can be supported 76 * in current environment or not. 77 */ 78 if (bmval[0] & FATTR4_WORD0_ACL) { 79 if (!IS_POSIXACL(dentry->d_inode)) 80 return nfserr_attrnotsupp; 81 } 82 83 /* 84 * According to spec, read-only attributes return ERR_INVAL. 85 */ 86 if (writable) { 87 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || 88 (bmval[2] & ~writable[2])) 89 return nfserr_inval; 90 } 91 92 return nfs_ok; 93 } 94 95 static __be32 96 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 97 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 98 { 99 __be32 status = nfs_ok; 100 101 if (open->op_create == NFS4_OPEN_CREATE) { 102 if (open->op_createmode == NFS4_CREATE_UNCHECKED 103 || open->op_createmode == NFS4_CREATE_GUARDED) 104 status = check_attr_support(rqstp, cstate, 105 open->op_bmval, nfsd_attrmask); 106 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 107 status = check_attr_support(rqstp, cstate, 108 open->op_bmval, nfsd41_ex_attrmask); 109 } 110 111 return status; 112 } 113 114 static int 115 is_create_with_attrs(struct nfsd4_open *open) 116 { 117 return open->op_create == NFS4_OPEN_CREATE 118 && (open->op_createmode == NFS4_CREATE_UNCHECKED 119 || open->op_createmode == NFS4_CREATE_GUARDED 120 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 121 } 122 123 /* 124 * if error occurs when setting the acl, just clear the acl bit 125 * in the returned attr bitmap. 126 */ 127 static void 128 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 129 struct nfs4_acl *acl, u32 *bmval) 130 { 131 __be32 status; 132 133 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 134 if (status) 135 /* 136 * We should probably fail the whole open at this point, 137 * but we've already created the file, so it's too late; 138 * So this seems the least of evils: 139 */ 140 bmval[0] &= ~FATTR4_WORD0_ACL; 141 } 142 143 static inline void 144 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 145 { 146 fh_put(dst); 147 dget(src->fh_dentry); 148 if (src->fh_export) 149 cache_get(&src->fh_export->h); 150 *dst = *src; 151 } 152 153 static __be32 154 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 155 { 156 __be32 status; 157 158 if (open->op_truncate && 159 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 160 return nfserr_inval; 161 162 accmode |= NFSD_MAY_READ_IF_EXEC; 163 164 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 165 accmode |= NFSD_MAY_READ; 166 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 167 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 168 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 169 accmode |= NFSD_MAY_WRITE; 170 171 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 172 173 return status; 174 } 175 176 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 177 { 178 umode_t mode = fh->fh_dentry->d_inode->i_mode; 179 180 if (S_ISREG(mode)) 181 return nfs_ok; 182 if (S_ISDIR(mode)) 183 return nfserr_isdir; 184 /* 185 * Using err_symlink as our catch-all case may look odd; but 186 * there's no other obvious error for this case in 4.0, and we 187 * happen to know that it will cause the linux v4 client to do 188 * the right thing on attempts to open something other than a 189 * regular file. 190 */ 191 return nfserr_symlink; 192 } 193 194 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 195 { 196 if (nfsd4_has_session(cstate)) 197 return; 198 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 199 &resfh->fh_handle); 200 } 201 202 static __be32 203 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 204 { 205 struct svc_fh *current_fh = &cstate->current_fh; 206 struct svc_fh *resfh; 207 int accmode; 208 __be32 status; 209 210 resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 211 if (!resfh) 212 return nfserr_jukebox; 213 fh_init(resfh, NFS4_FHSIZE); 214 open->op_truncate = 0; 215 216 if (open->op_create) { 217 /* FIXME: check session persistence and pnfs flags. 218 * The nfsv4.1 spec requires the following semantics: 219 * 220 * Persistent | pNFS | Server REQUIRED | Client Allowed 221 * Reply Cache | server | | 222 * -------------+--------+-----------------+-------------------- 223 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 224 * | | | (SHOULD) 225 * | | and EXCLUSIVE4 | or EXCLUSIVE4 226 * | | | (SHOULD NOT) 227 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 228 * yes | no | GUARDED4 | GUARDED4 229 * yes | yes | GUARDED4 | GUARDED4 230 */ 231 232 /* 233 * Note: create modes (UNCHECKED,GUARDED...) are the same 234 * in NFSv4 as in v3 except EXCLUSIVE4_1. 235 */ 236 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, 237 open->op_fname.len, &open->op_iattr, 238 resfh, open->op_createmode, 239 (u32 *)open->op_verf.data, 240 &open->op_truncate, &open->op_created); 241 242 /* 243 * Following rfc 3530 14.2.16, use the returned bitmask 244 * to indicate which attributes we used to store the 245 * verifier: 246 */ 247 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) 248 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | 249 FATTR4_WORD1_TIME_MODIFY); 250 } else { 251 status = nfsd_lookup(rqstp, current_fh, 252 open->op_fname.data, open->op_fname.len, resfh); 253 fh_unlock(current_fh); 254 } 255 if (status) 256 goto out; 257 status = nfsd_check_obj_isreg(resfh); 258 if (status) 259 goto out; 260 261 if (is_create_with_attrs(open) && open->op_acl != NULL) 262 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval); 263 264 nfsd4_set_open_owner_reply_cache(cstate, open, resfh); 265 accmode = NFSD_MAY_NOP; 266 if (open->op_created) 267 accmode |= NFSD_MAY_OWNER_OVERRIDE; 268 status = do_open_permission(rqstp, resfh, open, accmode); 269 set_change_info(&open->op_cinfo, current_fh); 270 fh_dup2(current_fh, resfh); 271 out: 272 fh_put(resfh); 273 kfree(resfh); 274 return status; 275 } 276 277 static __be32 278 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 279 { 280 struct svc_fh *current_fh = &cstate->current_fh; 281 __be32 status; 282 int accmode = 0; 283 284 /* We don't know the target directory, and therefore can not 285 * set the change info 286 */ 287 288 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 289 290 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 291 292 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 293 (open->op_iattr.ia_size == 0); 294 /* 295 * In the delegation case, the client is telling us about an 296 * open that it *already* performed locally, some time ago. We 297 * should let it succeed now if possible. 298 * 299 * In the case of a CLAIM_FH open, on the other hand, the client 300 * may be counting on us to enforce permissions (the Linux 4.1 301 * client uses this for normal opens, for example). 302 */ 303 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 304 accmode = NFSD_MAY_OWNER_OVERRIDE; 305 306 status = do_open_permission(rqstp, current_fh, open, accmode); 307 308 return status; 309 } 310 311 static void 312 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 313 { 314 struct nfsd4_sessionid *sid = 315 (struct nfsd4_sessionid *)session->se_sessionid.data; 316 317 clid->cl_boot = sid->clientid.cl_boot; 318 clid->cl_id = sid->clientid.cl_id; 319 } 320 321 static __be32 322 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 323 struct nfsd4_open *open) 324 { 325 __be32 status; 326 struct nfsd4_compoundres *resp; 327 struct net *net = SVC_NET(rqstp); 328 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 329 330 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 331 (int)open->op_fname.len, open->op_fname.data, 332 open->op_openowner); 333 334 /* This check required by spec. */ 335 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 336 return nfserr_inval; 337 338 open->op_created = 0; 339 /* 340 * RFC5661 18.51.3 341 * Before RECLAIM_COMPLETE done, server should deny new lock 342 */ 343 if (nfsd4_has_session(cstate) && 344 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 345 &cstate->session->se_client->cl_flags) && 346 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 347 return nfserr_grace; 348 349 if (nfsd4_has_session(cstate)) 350 copy_clientid(&open->op_clientid, cstate->session); 351 352 nfs4_lock_state(); 353 354 /* check seqid for replay. set nfs4_owner */ 355 resp = rqstp->rq_resp; 356 status = nfsd4_process_open1(&resp->cstate, open, nn); 357 if (status == nfserr_replay_me) { 358 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 359 fh_put(&cstate->current_fh); 360 fh_copy_shallow(&cstate->current_fh.fh_handle, 361 &rp->rp_openfh); 362 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 363 if (status) 364 dprintk("nfsd4_open: replay failed" 365 " restoring previous filehandle\n"); 366 else 367 status = nfserr_replay_me; 368 } 369 if (status) 370 goto out; 371 if (open->op_xdr_error) { 372 status = open->op_xdr_error; 373 goto out; 374 } 375 376 status = nfsd4_check_open_attributes(rqstp, cstate, open); 377 if (status) 378 goto out; 379 380 /* Openowner is now set, so sequence id will get bumped. Now we need 381 * these checks before we do any creates: */ 382 status = nfserr_grace; 383 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 384 goto out; 385 status = nfserr_no_grace; 386 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 387 goto out; 388 389 switch (open->op_claim_type) { 390 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 391 case NFS4_OPEN_CLAIM_NULL: 392 status = do_open_lookup(rqstp, cstate, open); 393 if (status) 394 goto out; 395 break; 396 case NFS4_OPEN_CLAIM_PREVIOUS: 397 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 398 status = nfs4_check_open_reclaim(&open->op_clientid, 399 cstate->minorversion, 400 nn); 401 if (status) 402 goto out; 403 case NFS4_OPEN_CLAIM_FH: 404 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 405 status = do_open_fhandle(rqstp, cstate, open); 406 if (status) 407 goto out; 408 break; 409 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 410 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 411 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 412 dprintk("NFSD: unsupported OPEN claim type %d\n", 413 open->op_claim_type); 414 status = nfserr_notsupp; 415 goto out; 416 default: 417 dprintk("NFSD: Invalid OPEN claim type %d\n", 418 open->op_claim_type); 419 status = nfserr_inval; 420 goto out; 421 } 422 /* 423 * nfsd4_process_open2() does the actual opening of the file. If 424 * successful, it (1) truncates the file if open->op_truncate was 425 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 426 */ 427 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open); 428 WARN_ON(status && open->op_created); 429 out: 430 nfsd4_cleanup_open_state(open, status); 431 if (open->op_openowner && !nfsd4_has_session(cstate)) 432 cstate->replay_owner = &open->op_openowner->oo_owner; 433 nfsd4_bump_seqid(cstate, status); 434 if (!cstate->replay_owner) 435 nfs4_unlock_state(); 436 return status; 437 } 438 439 /* 440 * OPEN is the only seqid-mutating operation whose decoding can fail 441 * with a seqid-mutating error (specifically, decoding of user names in 442 * the attributes). Therefore we have to do some processing to look up 443 * the stateowner so that we can bump the seqid. 444 */ 445 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 446 { 447 struct nfsd4_open *open = (struct nfsd4_open *)&op->u; 448 449 if (!seqid_mutating_err(ntohl(op->status))) 450 return op->status; 451 if (nfsd4_has_session(cstate)) 452 return op->status; 453 open->op_xdr_error = op->status; 454 return nfsd4_open(rqstp, cstate, open); 455 } 456 457 /* 458 * filehandle-manipulating ops. 459 */ 460 static __be32 461 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 462 struct svc_fh **getfh) 463 { 464 if (!cstate->current_fh.fh_dentry) 465 return nfserr_nofilehandle; 466 467 *getfh = &cstate->current_fh; 468 return nfs_ok; 469 } 470 471 static __be32 472 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 473 struct nfsd4_putfh *putfh) 474 { 475 fh_put(&cstate->current_fh); 476 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 477 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 478 putfh->pf_fhlen); 479 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 480 } 481 482 static __be32 483 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 484 void *arg) 485 { 486 __be32 status; 487 488 fh_put(&cstate->current_fh); 489 status = exp_pseudoroot(rqstp, &cstate->current_fh); 490 return status; 491 } 492 493 static __be32 494 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 495 void *arg) 496 { 497 if (!cstate->save_fh.fh_dentry) 498 return nfserr_restorefh; 499 500 fh_dup2(&cstate->current_fh, &cstate->save_fh); 501 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 502 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 503 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 504 } 505 return nfs_ok; 506 } 507 508 static __be32 509 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 510 void *arg) 511 { 512 if (!cstate->current_fh.fh_dentry) 513 return nfserr_nofilehandle; 514 515 fh_dup2(&cstate->save_fh, &cstate->current_fh); 516 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 517 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 518 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 519 } 520 return nfs_ok; 521 } 522 523 /* 524 * misc nfsv4 ops 525 */ 526 static __be32 527 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 528 struct nfsd4_access *access) 529 { 530 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 531 return nfserr_inval; 532 533 access->ac_resp_access = access->ac_req_access; 534 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 535 &access->ac_supported); 536 } 537 538 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 539 { 540 __be32 verf[2]; 541 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 542 543 verf[0] = (__be32)nn->nfssvc_boot.tv_sec; 544 verf[1] = (__be32)nn->nfssvc_boot.tv_usec; 545 memcpy(verifier->data, verf, sizeof(verifier->data)); 546 } 547 548 static __be32 549 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 550 struct nfsd4_commit *commit) 551 { 552 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 553 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 554 commit->co_count); 555 } 556 557 static __be32 558 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 559 struct nfsd4_create *create) 560 { 561 struct svc_fh resfh; 562 __be32 status; 563 dev_t rdev; 564 565 fh_init(&resfh, NFS4_FHSIZE); 566 567 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 568 NFSD_MAY_CREATE); 569 if (status) 570 return status; 571 572 status = check_attr_support(rqstp, cstate, create->cr_bmval, 573 nfsd_attrmask); 574 if (status) 575 return status; 576 577 switch (create->cr_type) { 578 case NF4LNK: 579 /* ugh! we have to null-terminate the linktext, or 580 * vfs_symlink() will choke. it is always safe to 581 * null-terminate by brute force, since at worst we 582 * will overwrite the first byte of the create namelen 583 * in the XDR buffer, which has already been extracted 584 * during XDR decode. 585 */ 586 create->cr_linkname[create->cr_linklen] = 0; 587 588 status = nfsd_symlink(rqstp, &cstate->current_fh, 589 create->cr_name, create->cr_namelen, 590 create->cr_linkname, create->cr_linklen, 591 &resfh, &create->cr_iattr); 592 break; 593 594 case NF4BLK: 595 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 596 if (MAJOR(rdev) != create->cr_specdata1 || 597 MINOR(rdev) != create->cr_specdata2) 598 return nfserr_inval; 599 status = nfsd_create(rqstp, &cstate->current_fh, 600 create->cr_name, create->cr_namelen, 601 &create->cr_iattr, S_IFBLK, rdev, &resfh); 602 break; 603 604 case NF4CHR: 605 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 606 if (MAJOR(rdev) != create->cr_specdata1 || 607 MINOR(rdev) != create->cr_specdata2) 608 return nfserr_inval; 609 status = nfsd_create(rqstp, &cstate->current_fh, 610 create->cr_name, create->cr_namelen, 611 &create->cr_iattr,S_IFCHR, rdev, &resfh); 612 break; 613 614 case NF4SOCK: 615 status = nfsd_create(rqstp, &cstate->current_fh, 616 create->cr_name, create->cr_namelen, 617 &create->cr_iattr, S_IFSOCK, 0, &resfh); 618 break; 619 620 case NF4FIFO: 621 status = nfsd_create(rqstp, &cstate->current_fh, 622 create->cr_name, create->cr_namelen, 623 &create->cr_iattr, S_IFIFO, 0, &resfh); 624 break; 625 626 case NF4DIR: 627 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 628 status = nfsd_create(rqstp, &cstate->current_fh, 629 create->cr_name, create->cr_namelen, 630 &create->cr_iattr, S_IFDIR, 0, &resfh); 631 break; 632 633 default: 634 status = nfserr_badtype; 635 } 636 637 if (status) 638 goto out; 639 640 if (create->cr_acl != NULL) 641 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 642 create->cr_bmval); 643 644 fh_unlock(&cstate->current_fh); 645 set_change_info(&create->cr_cinfo, &cstate->current_fh); 646 fh_dup2(&cstate->current_fh, &resfh); 647 out: 648 fh_put(&resfh); 649 return status; 650 } 651 652 static __be32 653 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 654 struct nfsd4_getattr *getattr) 655 { 656 __be32 status; 657 658 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 659 if (status) 660 return status; 661 662 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 663 return nfserr_inval; 664 665 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 666 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 667 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 668 669 getattr->ga_fhp = &cstate->current_fh; 670 return nfs_ok; 671 } 672 673 static __be32 674 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 675 struct nfsd4_link *link) 676 { 677 __be32 status = nfserr_nofilehandle; 678 679 if (!cstate->save_fh.fh_dentry) 680 return status; 681 status = nfsd_link(rqstp, &cstate->current_fh, 682 link->li_name, link->li_namelen, &cstate->save_fh); 683 if (!status) 684 set_change_info(&link->li_cinfo, &cstate->current_fh); 685 return status; 686 } 687 688 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 689 { 690 struct svc_fh tmp_fh; 691 __be32 ret; 692 693 fh_init(&tmp_fh, NFS4_FHSIZE); 694 ret = exp_pseudoroot(rqstp, &tmp_fh); 695 if (ret) 696 return ret; 697 if (tmp_fh.fh_dentry == fh->fh_dentry) { 698 fh_put(&tmp_fh); 699 return nfserr_noent; 700 } 701 fh_put(&tmp_fh); 702 return nfsd_lookup(rqstp, fh, "..", 2, fh); 703 } 704 705 static __be32 706 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 707 void *arg) 708 { 709 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 710 } 711 712 static __be32 713 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 714 struct nfsd4_lookup *lookup) 715 { 716 return nfsd_lookup(rqstp, &cstate->current_fh, 717 lookup->lo_name, lookup->lo_len, 718 &cstate->current_fh); 719 } 720 721 static __be32 722 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 723 struct nfsd4_read *read) 724 { 725 __be32 status; 726 727 /* no need to check permission - this will be done in nfsd_read() */ 728 729 read->rd_filp = NULL; 730 if (read->rd_offset >= OFFSET_MAX) 731 return nfserr_inval; 732 733 /* 734 * If we do a zero copy read, then a client will see read data 735 * that reflects the state of the file *after* performing the 736 * following compound. 737 * 738 * To ensure proper ordering, we therefore turn off zero copy if 739 * the client wants us to do more in this compound: 740 */ 741 if (!nfsd4_last_compound_op(rqstp)) 742 rqstp->rq_splice_ok = false; 743 744 nfs4_lock_state(); 745 /* check stateid */ 746 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 747 cstate, &read->rd_stateid, 748 RD_STATE, &read->rd_filp))) { 749 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 750 goto out; 751 } 752 if (read->rd_filp) 753 get_file(read->rd_filp); 754 status = nfs_ok; 755 out: 756 nfs4_unlock_state(); 757 read->rd_rqstp = rqstp; 758 read->rd_fhp = &cstate->current_fh; 759 return status; 760 } 761 762 static __be32 763 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 764 struct nfsd4_readdir *readdir) 765 { 766 u64 cookie = readdir->rd_cookie; 767 static const nfs4_verifier zeroverf; 768 769 /* no need to check permission - this will be done in nfsd_readdir() */ 770 771 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 772 return nfserr_inval; 773 774 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 775 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 776 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 777 778 if ((cookie == 1) || (cookie == 2) || 779 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 780 return nfserr_bad_cookie; 781 782 readdir->rd_rqstp = rqstp; 783 readdir->rd_fhp = &cstate->current_fh; 784 return nfs_ok; 785 } 786 787 static __be32 788 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 789 struct nfsd4_readlink *readlink) 790 { 791 readlink->rl_rqstp = rqstp; 792 readlink->rl_fhp = &cstate->current_fh; 793 return nfs_ok; 794 } 795 796 static __be32 797 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 798 struct nfsd4_remove *remove) 799 { 800 __be32 status; 801 802 if (locks_in_grace(SVC_NET(rqstp))) 803 return nfserr_grace; 804 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 805 remove->rm_name, remove->rm_namelen); 806 if (!status) { 807 fh_unlock(&cstate->current_fh); 808 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 809 } 810 return status; 811 } 812 813 static __be32 814 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 815 struct nfsd4_rename *rename) 816 { 817 __be32 status = nfserr_nofilehandle; 818 819 if (!cstate->save_fh.fh_dentry) 820 return status; 821 if (locks_in_grace(SVC_NET(rqstp)) && 822 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 823 return nfserr_grace; 824 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 825 rename->rn_snamelen, &cstate->current_fh, 826 rename->rn_tname, rename->rn_tnamelen); 827 if (status) 828 return status; 829 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 830 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 831 return nfs_ok; 832 } 833 834 static __be32 835 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 836 struct nfsd4_secinfo *secinfo) 837 { 838 struct svc_fh resfh; 839 struct svc_export *exp; 840 struct dentry *dentry; 841 __be32 err; 842 843 fh_init(&resfh, NFS4_FHSIZE); 844 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 845 if (err) 846 return err; 847 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 848 secinfo->si_name, secinfo->si_namelen, 849 &exp, &dentry); 850 if (err) 851 return err; 852 if (dentry->d_inode == NULL) { 853 exp_put(exp); 854 err = nfserr_noent; 855 } else 856 secinfo->si_exp = exp; 857 dput(dentry); 858 if (cstate->minorversion) 859 /* See rfc 5661 section 2.6.3.1.1.8 */ 860 fh_put(&cstate->current_fh); 861 return err; 862 } 863 864 static __be32 865 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 866 struct nfsd4_secinfo_no_name *sin) 867 { 868 __be32 err; 869 870 switch (sin->sin_style) { 871 case NFS4_SECINFO_STYLE4_CURRENT_FH: 872 break; 873 case NFS4_SECINFO_STYLE4_PARENT: 874 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 875 if (err) 876 return err; 877 break; 878 default: 879 return nfserr_inval; 880 } 881 exp_get(cstate->current_fh.fh_export); 882 sin->sin_exp = cstate->current_fh.fh_export; 883 fh_put(&cstate->current_fh); 884 return nfs_ok; 885 } 886 887 static __be32 888 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 889 struct nfsd4_setattr *setattr) 890 { 891 __be32 status = nfs_ok; 892 int err; 893 894 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 895 nfs4_lock_state(); 896 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 897 &setattr->sa_stateid, WR_STATE, NULL); 898 nfs4_unlock_state(); 899 if (status) { 900 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 901 return status; 902 } 903 } 904 err = fh_want_write(&cstate->current_fh); 905 if (err) 906 return nfserrno(err); 907 status = nfs_ok; 908 909 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 910 nfsd_attrmask); 911 if (status) 912 goto out; 913 914 if (setattr->sa_acl != NULL) 915 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 916 setattr->sa_acl); 917 if (status) 918 goto out; 919 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 920 0, (time_t)0); 921 out: 922 fh_drop_write(&cstate->current_fh); 923 return status; 924 } 925 926 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 927 { 928 int i = 1; 929 int buflen = write->wr_buflen; 930 931 vec[0].iov_base = write->wr_head.iov_base; 932 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 933 buflen -= vec[0].iov_len; 934 935 while (buflen) { 936 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 937 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 938 buflen -= vec[i].iov_len; 939 i++; 940 } 941 return i; 942 } 943 944 static __be32 945 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 946 struct nfsd4_write *write) 947 { 948 stateid_t *stateid = &write->wr_stateid; 949 struct file *filp = NULL; 950 __be32 status = nfs_ok; 951 unsigned long cnt; 952 int nvecs; 953 954 /* no need to check permission - this will be done in nfsd_write() */ 955 956 if (write->wr_offset >= OFFSET_MAX) 957 return nfserr_inval; 958 959 nfs4_lock_state(); 960 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 961 cstate, stateid, WR_STATE, &filp); 962 if (status) { 963 nfs4_unlock_state(); 964 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 965 return status; 966 } 967 if (filp) 968 get_file(filp); 969 nfs4_unlock_state(); 970 971 cnt = write->wr_buflen; 972 write->wr_how_written = write->wr_stable_how; 973 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 974 975 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 976 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 977 978 status = nfsd_write(rqstp, &cstate->current_fh, filp, 979 write->wr_offset, rqstp->rq_vec, nvecs, 980 &cnt, &write->wr_how_written); 981 if (filp) 982 fput(filp); 983 984 write->wr_bytes_written = cnt; 985 986 return status; 987 } 988 989 /* This routine never returns NFS_OK! If there are no other errors, it 990 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 991 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 992 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 993 */ 994 static __be32 995 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 996 struct nfsd4_verify *verify) 997 { 998 __be32 *buf, *p; 999 int count; 1000 __be32 status; 1001 1002 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1003 if (status) 1004 return status; 1005 1006 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1007 if (status) 1008 return status; 1009 1010 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1011 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1012 return nfserr_inval; 1013 if (verify->ve_attrlen & 3) 1014 return nfserr_inval; 1015 1016 /* count in words: 1017 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1018 */ 1019 count = 4 + (verify->ve_attrlen >> 2); 1020 buf = kmalloc(count << 2, GFP_KERNEL); 1021 if (!buf) 1022 return nfserr_jukebox; 1023 1024 p = buf; 1025 status = nfsd4_encode_fattr(&cstate->current_fh, 1026 cstate->current_fh.fh_export, 1027 cstate->current_fh.fh_dentry, &p, 1028 count, verify->ve_bmval, 1029 rqstp, 0); 1030 1031 /* this means that nfsd4_encode_fattr() ran out of space */ 1032 if (status == nfserr_resource) 1033 status = nfserr_not_same; 1034 if (status) 1035 goto out_kfree; 1036 1037 /* skip bitmap */ 1038 p = buf + 1 + ntohl(buf[0]); 1039 status = nfserr_not_same; 1040 if (ntohl(*p++) != verify->ve_attrlen) 1041 goto out_kfree; 1042 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1043 status = nfserr_same; 1044 1045 out_kfree: 1046 kfree(buf); 1047 return status; 1048 } 1049 1050 static __be32 1051 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1052 struct nfsd4_verify *verify) 1053 { 1054 __be32 status; 1055 1056 status = _nfsd4_verify(rqstp, cstate, verify); 1057 return status == nfserr_not_same ? nfs_ok : status; 1058 } 1059 1060 static __be32 1061 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1062 struct nfsd4_verify *verify) 1063 { 1064 __be32 status; 1065 1066 status = _nfsd4_verify(rqstp, cstate, verify); 1067 return status == nfserr_same ? nfs_ok : status; 1068 } 1069 1070 /* 1071 * NULL call. 1072 */ 1073 static __be32 1074 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1075 { 1076 return nfs_ok; 1077 } 1078 1079 static inline void nfsd4_increment_op_stats(u32 opnum) 1080 { 1081 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1082 nfsdstats.nfs4_opcount[opnum]++; 1083 } 1084 1085 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1086 void *); 1087 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1088 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1089 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1090 1091 enum nfsd4_op_flags { 1092 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1093 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1094 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1095 /* For rfc 5661 section 2.6.3.1.1: */ 1096 OP_HANDLES_WRONGSEC = 1 << 3, 1097 OP_IS_PUTFH_LIKE = 1 << 4, 1098 /* 1099 * These are the ops whose result size we estimate before 1100 * encoding, to avoid performing an op then not being able to 1101 * respond or cache a response. This includes writes and setattrs 1102 * as well as the operations usually called "nonidempotent": 1103 */ 1104 OP_MODIFIES_SOMETHING = 1 << 5, 1105 /* 1106 * Cache compounds containing these ops in the xid-based drc: 1107 * We use the DRC for compounds containing non-idempotent 1108 * operations, *except* those that are 4.1-specific (since 1109 * sessions provide their own EOS), and except for stateful 1110 * operations other than setclientid and setclientid_confirm 1111 * (since sequence numbers provide EOS for open, lock, etc in 1112 * the v4.0 case). 1113 */ 1114 OP_CACHEME = 1 << 6, 1115 /* 1116 * These are ops which clear current state id. 1117 */ 1118 OP_CLEAR_STATEID = 1 << 7, 1119 }; 1120 1121 struct nfsd4_operation { 1122 nfsd4op_func op_func; 1123 u32 op_flags; 1124 char *op_name; 1125 /* Try to get response size before operation */ 1126 nfsd4op_rsize op_rsize_bop; 1127 stateid_getter op_get_currentstateid; 1128 stateid_setter op_set_currentstateid; 1129 }; 1130 1131 static struct nfsd4_operation nfsd4_ops[]; 1132 1133 #ifdef NFSD_DEBUG 1134 static const char *nfsd4_op_name(unsigned opnum); 1135 #endif 1136 1137 /* 1138 * Enforce NFSv4.1 COMPOUND ordering rules: 1139 * 1140 * Also note, enforced elsewhere: 1141 * - SEQUENCE other than as first op results in 1142 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1143 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1144 * (Enforced in nfsd4_bind_conn_to_session().) 1145 * - DESTROY_SESSION must be the final operation in a compound, if 1146 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1147 * (Enforced in nfsd4_destroy_session().) 1148 */ 1149 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1150 { 1151 struct nfsd4_op *op = &args->ops[0]; 1152 1153 /* These ordering requirements don't apply to NFSv4.0: */ 1154 if (args->minorversion == 0) 1155 return nfs_ok; 1156 /* This is weird, but OK, not our problem: */ 1157 if (args->opcnt == 0) 1158 return nfs_ok; 1159 if (op->status == nfserr_op_illegal) 1160 return nfs_ok; 1161 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1162 return nfserr_op_not_in_session; 1163 if (op->opnum == OP_SEQUENCE) 1164 return nfs_ok; 1165 if (args->opcnt != 1) 1166 return nfserr_not_only_op; 1167 return nfs_ok; 1168 } 1169 1170 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1171 { 1172 return &nfsd4_ops[op->opnum]; 1173 } 1174 1175 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1176 { 1177 return OPDESC(op)->op_flags & OP_CACHEME; 1178 } 1179 1180 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1181 { 1182 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1183 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1184 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1185 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1186 struct nfsd4_operation *thisd; 1187 struct nfsd4_operation *nextd; 1188 1189 thisd = OPDESC(this); 1190 /* 1191 * Most ops check wronsec on our own; only the putfh-like ops 1192 * have special rules. 1193 */ 1194 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1195 return false; 1196 /* 1197 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1198 * put-filehandle operation if we're not going to use the 1199 * result: 1200 */ 1201 if (argp->opcnt == resp->opcnt) 1202 return false; 1203 1204 nextd = OPDESC(next); 1205 /* 1206 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1207 * errors themselves as necessary; others should check for them 1208 * now: 1209 */ 1210 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1211 } 1212 1213 /* 1214 * COMPOUND call. 1215 */ 1216 static __be32 1217 nfsd4_proc_compound(struct svc_rqst *rqstp, 1218 struct nfsd4_compoundargs *args, 1219 struct nfsd4_compoundres *resp) 1220 { 1221 struct nfsd4_op *op; 1222 struct nfsd4_operation *opdesc; 1223 struct nfsd4_compound_state *cstate = &resp->cstate; 1224 int slack_bytes; 1225 u32 plen = 0; 1226 __be32 status; 1227 1228 resp->xbuf = &rqstp->rq_res; 1229 resp->p = rqstp->rq_res.head[0].iov_base + 1230 rqstp->rq_res.head[0].iov_len; 1231 resp->tagp = resp->p; 1232 /* reserve space for: taglen, tag, and opcnt */ 1233 resp->p += 2 + XDR_QUADLEN(args->taglen); 1234 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; 1235 resp->taglen = args->taglen; 1236 resp->tag = args->tag; 1237 resp->opcnt = 0; 1238 resp->rqstp = rqstp; 1239 resp->cstate.minorversion = args->minorversion; 1240 resp->cstate.replay_owner = NULL; 1241 resp->cstate.session = NULL; 1242 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); 1243 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); 1244 /* 1245 * Don't use the deferral mechanism for NFSv4; compounds make it 1246 * too hard to avoid non-idempotency problems. 1247 */ 1248 rqstp->rq_usedeferral = 0; 1249 1250 /* 1251 * According to RFC3010, this takes precedence over all other errors. 1252 */ 1253 status = nfserr_minor_vers_mismatch; 1254 if (args->minorversion > nfsd_supported_minorversion) 1255 goto out; 1256 1257 status = nfs41_check_op_ordering(args); 1258 if (status) { 1259 op = &args->ops[0]; 1260 op->status = status; 1261 goto encode_op; 1262 } 1263 1264 while (!status && resp->opcnt < args->opcnt) { 1265 op = &args->ops[resp->opcnt++]; 1266 1267 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1268 resp->opcnt, args->opcnt, op->opnum, 1269 nfsd4_op_name(op->opnum)); 1270 /* 1271 * The XDR decode routines may have pre-set op->status; 1272 * for example, if there is a miscellaneous XDR error 1273 * it will be set to nfserr_bad_xdr. 1274 */ 1275 if (op->status) { 1276 if (op->opnum == OP_OPEN) 1277 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1278 goto encode_op; 1279 } 1280 1281 /* We must be able to encode a successful response to 1282 * this operation, with enough room left over to encode a 1283 * failed response to the next operation. If we don't 1284 * have enough room, fail with ERR_RESOURCE. 1285 */ 1286 slack_bytes = (char *)resp->end - (char *)resp->p; 1287 if (slack_bytes < COMPOUND_SLACK_SPACE 1288 + COMPOUND_ERR_SLACK_SPACE) { 1289 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); 1290 op->status = nfserr_resource; 1291 goto encode_op; 1292 } 1293 1294 opdesc = OPDESC(op); 1295 1296 if (!cstate->current_fh.fh_dentry) { 1297 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1298 op->status = nfserr_nofilehandle; 1299 goto encode_op; 1300 } 1301 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && 1302 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1303 op->status = nfserr_moved; 1304 goto encode_op; 1305 } 1306 1307 /* If op is non-idempotent */ 1308 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1309 plen = opdesc->op_rsize_bop(rqstp, op); 1310 op->status = nfsd4_check_resp_size(resp, plen); 1311 } 1312 1313 if (op->status) 1314 goto encode_op; 1315 1316 if (opdesc->op_get_currentstateid) 1317 opdesc->op_get_currentstateid(cstate, &op->u); 1318 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1319 1320 if (!op->status) { 1321 if (opdesc->op_set_currentstateid) 1322 opdesc->op_set_currentstateid(cstate, &op->u); 1323 1324 if (opdesc->op_flags & OP_CLEAR_STATEID) 1325 clear_current_stateid(cstate); 1326 1327 if (need_wrongsec_check(rqstp)) 1328 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp); 1329 } 1330 1331 encode_op: 1332 /* Only from SEQUENCE */ 1333 if (resp->cstate.status == nfserr_replay_cache) { 1334 dprintk("%s NFS4.1 replay from cache\n", __func__); 1335 status = op->status; 1336 goto out; 1337 } 1338 if (op->status == nfserr_replay_me) { 1339 op->replay = &cstate->replay_owner->so_replay; 1340 nfsd4_encode_replay(resp, op); 1341 status = op->status = op->replay->rp_status; 1342 } else { 1343 nfsd4_encode_operation(resp, op); 1344 status = op->status; 1345 } 1346 1347 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1348 args->ops, args->opcnt, resp->opcnt, op->opnum, 1349 be32_to_cpu(status)); 1350 1351 if (cstate->replay_owner) { 1352 nfs4_unlock_state(); 1353 cstate->replay_owner = NULL; 1354 } 1355 /* XXX Ugh, we need to get rid of this kind of special case: */ 1356 if (op->opnum == OP_READ && op->u.read.rd_filp) 1357 fput(op->u.read.rd_filp); 1358 1359 nfsd4_increment_op_stats(op->opnum); 1360 } 1361 1362 resp->cstate.status = status; 1363 fh_put(&resp->cstate.current_fh); 1364 fh_put(&resp->cstate.save_fh); 1365 BUG_ON(resp->cstate.replay_owner); 1366 out: 1367 /* Reset deferral mechanism for RPC deferrals */ 1368 rqstp->rq_usedeferral = 1; 1369 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1370 return status; 1371 } 1372 1373 #define op_encode_hdr_size (2) 1374 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1375 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1376 #define op_encode_change_info_maxsz (5) 1377 #define nfs4_fattr_bitmap_maxsz (4) 1378 1379 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1380 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1381 1382 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1383 1384 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1385 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1386 op_encode_ace_maxsz) 1387 1388 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1389 1390 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1391 { 1392 return (op_encode_hdr_size) * sizeof(__be32); 1393 } 1394 1395 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1396 { 1397 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1398 } 1399 1400 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1401 { 1402 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1403 } 1404 1405 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1406 { 1407 return (op_encode_hdr_size + op_encode_change_info_maxsz 1408 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1409 } 1410 1411 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1412 { 1413 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1414 * sizeof(__be32); 1415 } 1416 1417 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1418 { 1419 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1420 * sizeof(__be32); 1421 } 1422 1423 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1424 { 1425 return (op_encode_hdr_size + op_encode_stateid_maxsz 1426 + op_encode_change_info_maxsz + 1 1427 + nfs4_fattr_bitmap_maxsz 1428 + op_encode_delegation_maxsz) * sizeof(__be32); 1429 } 1430 1431 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1432 { 1433 u32 maxcount = 0, rlen = 0; 1434 1435 maxcount = svc_max_payload(rqstp); 1436 rlen = op->u.read.rd_length; 1437 1438 if (rlen > maxcount) 1439 rlen = maxcount; 1440 1441 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen; 1442 } 1443 1444 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1445 { 1446 u32 rlen = op->u.readdir.rd_maxcount; 1447 1448 if (rlen > PAGE_SIZE) 1449 rlen = PAGE_SIZE; 1450 1451 return (op_encode_hdr_size + op_encode_verifier_maxsz) 1452 * sizeof(__be32) + rlen; 1453 } 1454 1455 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1456 { 1457 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1458 * sizeof(__be32); 1459 } 1460 1461 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1462 { 1463 return (op_encode_hdr_size + op_encode_change_info_maxsz 1464 + op_encode_change_info_maxsz) * sizeof(__be32); 1465 } 1466 1467 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1468 { 1469 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1470 } 1471 1472 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1473 { 1474 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32); 1475 } 1476 1477 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1478 { 1479 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1480 } 1481 1482 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1483 { 1484 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1485 1 + 1 + 0 + /* eir_flags, spr_how, SP4_NONE (for now) */\ 1486 2 + /*eir_server_owner.so_minor_id */\ 1487 /* eir_server_owner.so_major_id<> */\ 1488 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1489 /* eir_server_scope<> */\ 1490 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1491 1 + /* eir_server_impl_id array length */\ 1492 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1493 } 1494 1495 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1496 { 1497 return (op_encode_hdr_size + \ 1498 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1499 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1500 } 1501 1502 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1503 { 1504 return (op_encode_hdr_size + \ 1505 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1506 2 + /* csr_sequence, csr_flags */\ 1507 op_encode_channel_attrs_maxsz + \ 1508 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1509 } 1510 1511 static struct nfsd4_operation nfsd4_ops[] = { 1512 [OP_ACCESS] = { 1513 .op_func = (nfsd4op_func)nfsd4_access, 1514 .op_name = "OP_ACCESS", 1515 }, 1516 [OP_CLOSE] = { 1517 .op_func = (nfsd4op_func)nfsd4_close, 1518 .op_flags = OP_MODIFIES_SOMETHING, 1519 .op_name = "OP_CLOSE", 1520 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1521 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 1522 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 1523 }, 1524 [OP_COMMIT] = { 1525 .op_func = (nfsd4op_func)nfsd4_commit, 1526 .op_flags = OP_MODIFIES_SOMETHING, 1527 .op_name = "OP_COMMIT", 1528 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 1529 }, 1530 [OP_CREATE] = { 1531 .op_func = (nfsd4op_func)nfsd4_create, 1532 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 1533 .op_name = "OP_CREATE", 1534 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 1535 }, 1536 [OP_DELEGRETURN] = { 1537 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1538 .op_flags = OP_MODIFIES_SOMETHING, 1539 .op_name = "OP_DELEGRETURN", 1540 .op_rsize_bop = nfsd4_only_status_rsize, 1541 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 1542 }, 1543 [OP_GETATTR] = { 1544 .op_func = (nfsd4op_func)nfsd4_getattr, 1545 .op_flags = ALLOWED_ON_ABSENT_FS, 1546 .op_name = "OP_GETATTR", 1547 }, 1548 [OP_GETFH] = { 1549 .op_func = (nfsd4op_func)nfsd4_getfh, 1550 .op_name = "OP_GETFH", 1551 }, 1552 [OP_LINK] = { 1553 .op_func = (nfsd4op_func)nfsd4_link, 1554 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 1555 | OP_CACHEME, 1556 .op_name = "OP_LINK", 1557 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 1558 }, 1559 [OP_LOCK] = { 1560 .op_func = (nfsd4op_func)nfsd4_lock, 1561 .op_flags = OP_MODIFIES_SOMETHING, 1562 .op_name = "OP_LOCK", 1563 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 1564 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 1565 }, 1566 [OP_LOCKT] = { 1567 .op_func = (nfsd4op_func)nfsd4_lockt, 1568 .op_name = "OP_LOCKT", 1569 }, 1570 [OP_LOCKU] = { 1571 .op_func = (nfsd4op_func)nfsd4_locku, 1572 .op_flags = OP_MODIFIES_SOMETHING, 1573 .op_name = "OP_LOCKU", 1574 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1575 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 1576 }, 1577 [OP_LOOKUP] = { 1578 .op_func = (nfsd4op_func)nfsd4_lookup, 1579 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1580 .op_name = "OP_LOOKUP", 1581 }, 1582 [OP_LOOKUPP] = { 1583 .op_func = (nfsd4op_func)nfsd4_lookupp, 1584 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1585 .op_name = "OP_LOOKUPP", 1586 }, 1587 [OP_NVERIFY] = { 1588 .op_func = (nfsd4op_func)nfsd4_nverify, 1589 .op_name = "OP_NVERIFY", 1590 }, 1591 [OP_OPEN] = { 1592 .op_func = (nfsd4op_func)nfsd4_open, 1593 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1594 .op_name = "OP_OPEN", 1595 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 1596 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 1597 }, 1598 [OP_OPEN_CONFIRM] = { 1599 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1600 .op_flags = OP_MODIFIES_SOMETHING, 1601 .op_name = "OP_OPEN_CONFIRM", 1602 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1603 }, 1604 [OP_OPEN_DOWNGRADE] = { 1605 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1606 .op_flags = OP_MODIFIES_SOMETHING, 1607 .op_name = "OP_OPEN_DOWNGRADE", 1608 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1609 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 1610 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 1611 }, 1612 [OP_PUTFH] = { 1613 .op_func = (nfsd4op_func)nfsd4_putfh, 1614 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1615 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1616 | OP_CLEAR_STATEID, 1617 .op_name = "OP_PUTFH", 1618 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1619 }, 1620 [OP_PUTPUBFH] = { 1621 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1622 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1623 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1624 | OP_CLEAR_STATEID, 1625 .op_name = "OP_PUTPUBFH", 1626 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1627 }, 1628 [OP_PUTROOTFH] = { 1629 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1630 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1631 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1632 | OP_CLEAR_STATEID, 1633 .op_name = "OP_PUTROOTFH", 1634 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1635 }, 1636 [OP_READ] = { 1637 .op_func = (nfsd4op_func)nfsd4_read, 1638 .op_flags = OP_MODIFIES_SOMETHING, 1639 .op_name = "OP_READ", 1640 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 1641 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 1642 }, 1643 [OP_READDIR] = { 1644 .op_func = (nfsd4op_func)nfsd4_readdir, 1645 .op_flags = OP_MODIFIES_SOMETHING, 1646 .op_name = "OP_READDIR", 1647 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 1648 }, 1649 [OP_READLINK] = { 1650 .op_func = (nfsd4op_func)nfsd4_readlink, 1651 .op_name = "OP_READLINK", 1652 }, 1653 [OP_REMOVE] = { 1654 .op_func = (nfsd4op_func)nfsd4_remove, 1655 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1656 .op_name = "OP_REMOVE", 1657 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 1658 }, 1659 [OP_RENAME] = { 1660 .op_func = (nfsd4op_func)nfsd4_rename, 1661 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1662 .op_name = "OP_RENAME", 1663 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 1664 }, 1665 [OP_RENEW] = { 1666 .op_func = (nfsd4op_func)nfsd4_renew, 1667 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1668 | OP_MODIFIES_SOMETHING, 1669 .op_name = "OP_RENEW", 1670 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1671 1672 }, 1673 [OP_RESTOREFH] = { 1674 .op_func = (nfsd4op_func)nfsd4_restorefh, 1675 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1676 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 1677 .op_name = "OP_RESTOREFH", 1678 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1679 }, 1680 [OP_SAVEFH] = { 1681 .op_func = (nfsd4op_func)nfsd4_savefh, 1682 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1683 .op_name = "OP_SAVEFH", 1684 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1685 }, 1686 [OP_SECINFO] = { 1687 .op_func = (nfsd4op_func)nfsd4_secinfo, 1688 .op_flags = OP_HANDLES_WRONGSEC, 1689 .op_name = "OP_SECINFO", 1690 }, 1691 [OP_SETATTR] = { 1692 .op_func = (nfsd4op_func)nfsd4_setattr, 1693 .op_name = "OP_SETATTR", 1694 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1695 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 1696 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 1697 }, 1698 [OP_SETCLIENTID] = { 1699 .op_func = (nfsd4op_func)nfsd4_setclientid, 1700 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1701 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1702 .op_name = "OP_SETCLIENTID", 1703 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 1704 }, 1705 [OP_SETCLIENTID_CONFIRM] = { 1706 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1707 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1708 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1709 .op_name = "OP_SETCLIENTID_CONFIRM", 1710 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1711 }, 1712 [OP_VERIFY] = { 1713 .op_func = (nfsd4op_func)nfsd4_verify, 1714 .op_name = "OP_VERIFY", 1715 }, 1716 [OP_WRITE] = { 1717 .op_func = (nfsd4op_func)nfsd4_write, 1718 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1719 .op_name = "OP_WRITE", 1720 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 1721 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 1722 }, 1723 [OP_RELEASE_LOCKOWNER] = { 1724 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1725 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1726 | OP_MODIFIES_SOMETHING, 1727 .op_name = "OP_RELEASE_LOCKOWNER", 1728 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1729 }, 1730 1731 /* NFSv4.1 operations */ 1732 [OP_EXCHANGE_ID] = { 1733 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1734 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1735 | OP_MODIFIES_SOMETHING, 1736 .op_name = "OP_EXCHANGE_ID", 1737 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 1738 }, 1739 [OP_BACKCHANNEL_CTL] = { 1740 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 1741 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1742 .op_name = "OP_BACKCHANNEL_CTL", 1743 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1744 }, 1745 [OP_BIND_CONN_TO_SESSION] = { 1746 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 1747 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1748 | OP_MODIFIES_SOMETHING, 1749 .op_name = "OP_BIND_CONN_TO_SESSION", 1750 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 1751 }, 1752 [OP_CREATE_SESSION] = { 1753 .op_func = (nfsd4op_func)nfsd4_create_session, 1754 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1755 | OP_MODIFIES_SOMETHING, 1756 .op_name = "OP_CREATE_SESSION", 1757 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 1758 }, 1759 [OP_DESTROY_SESSION] = { 1760 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1761 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1762 | OP_MODIFIES_SOMETHING, 1763 .op_name = "OP_DESTROY_SESSION", 1764 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1765 }, 1766 [OP_SEQUENCE] = { 1767 .op_func = (nfsd4op_func)nfsd4_sequence, 1768 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1769 .op_name = "OP_SEQUENCE", 1770 }, 1771 [OP_DESTROY_CLIENTID] = { 1772 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 1773 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1774 | OP_MODIFIES_SOMETHING, 1775 .op_name = "OP_DESTROY_CLIENTID", 1776 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1777 }, 1778 [OP_RECLAIM_COMPLETE] = { 1779 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 1780 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1781 .op_name = "OP_RECLAIM_COMPLETE", 1782 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1783 }, 1784 [OP_SECINFO_NO_NAME] = { 1785 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 1786 .op_flags = OP_HANDLES_WRONGSEC, 1787 .op_name = "OP_SECINFO_NO_NAME", 1788 }, 1789 [OP_TEST_STATEID] = { 1790 .op_func = (nfsd4op_func)nfsd4_test_stateid, 1791 .op_flags = ALLOWED_WITHOUT_FH, 1792 .op_name = "OP_TEST_STATEID", 1793 }, 1794 [OP_FREE_STATEID] = { 1795 .op_func = (nfsd4op_func)nfsd4_free_stateid, 1796 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1797 .op_name = "OP_FREE_STATEID", 1798 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 1799 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1800 }, 1801 }; 1802 1803 #ifdef NFSD_DEBUG 1804 static const char *nfsd4_op_name(unsigned opnum) 1805 { 1806 if (opnum < ARRAY_SIZE(nfsd4_ops)) 1807 return nfsd4_ops[opnum].op_name; 1808 return "unknown_operation"; 1809 } 1810 #endif 1811 1812 #define nfsd4_voidres nfsd4_voidargs 1813 struct nfsd4_voidargs { int dummy; }; 1814 1815 static struct svc_procedure nfsd_procedures4[2] = { 1816 [NFSPROC4_NULL] = { 1817 .pc_func = (svc_procfunc) nfsd4_proc_null, 1818 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 1819 .pc_argsize = sizeof(struct nfsd4_voidargs), 1820 .pc_ressize = sizeof(struct nfsd4_voidres), 1821 .pc_cachetype = RC_NOCACHE, 1822 .pc_xdrressize = 1, 1823 }, 1824 [NFSPROC4_COMPOUND] = { 1825 .pc_func = (svc_procfunc) nfsd4_proc_compound, 1826 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 1827 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 1828 .pc_argsize = sizeof(struct nfsd4_compoundargs), 1829 .pc_ressize = sizeof(struct nfsd4_compoundres), 1830 .pc_release = nfsd4_release_compoundargs, 1831 .pc_cachetype = RC_NOCACHE, 1832 .pc_xdrressize = NFSD_BUFSIZE/4, 1833 }, 1834 }; 1835 1836 struct svc_version nfsd_version4 = { 1837 .vs_vers = 4, 1838 .vs_nproc = 2, 1839 .vs_proc = nfsd_procedures4, 1840 .vs_dispatch = nfsd_dispatch, 1841 .vs_xdrsize = NFS4_SVC_XDRSIZE, 1842 }; 1843 1844 /* 1845 * Local variables: 1846 * c-basic-offset: 8 1847 * End: 1848 */ 1849