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 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 46 #include <linux/security.h> 47 48 static inline void 49 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 50 { 51 struct inode *inode = resfh->fh_dentry->d_inode; 52 int status; 53 54 mutex_lock(&inode->i_mutex); 55 status = security_inode_setsecctx(resfh->fh_dentry, 56 label->data, label->len); 57 mutex_unlock(&inode->i_mutex); 58 59 if (status) 60 /* 61 * XXX: We should really fail the whole open, but we may 62 * already have created a new file, so it may be too 63 * late. For now this seems the least of evils: 64 */ 65 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 66 67 return; 68 } 69 #else 70 static inline void 71 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 72 { } 73 #endif 74 75 #define NFSDDBG_FACILITY NFSDDBG_PROC 76 77 static u32 nfsd_attrmask[] = { 78 NFSD_WRITEABLE_ATTRS_WORD0, 79 NFSD_WRITEABLE_ATTRS_WORD1, 80 NFSD_WRITEABLE_ATTRS_WORD2 81 }; 82 83 static u32 nfsd41_ex_attrmask[] = { 84 NFSD_SUPPATTR_EXCLCREAT_WORD0, 85 NFSD_SUPPATTR_EXCLCREAT_WORD1, 86 NFSD_SUPPATTR_EXCLCREAT_WORD2 87 }; 88 89 static __be32 90 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 91 u32 *bmval, u32 *writable) 92 { 93 struct dentry *dentry = cstate->current_fh.fh_dentry; 94 95 /* 96 * Check about attributes are supported by the NFSv4 server or not. 97 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. 98 */ 99 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || 100 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || 101 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) 102 return nfserr_attrnotsupp; 103 104 /* 105 * Check FATTR4_WORD0_ACL can be supported 106 * in current environment or not. 107 */ 108 if (bmval[0] & FATTR4_WORD0_ACL) { 109 if (!IS_POSIXACL(dentry->d_inode)) 110 return nfserr_attrnotsupp; 111 } 112 113 /* 114 * According to spec, read-only attributes return ERR_INVAL. 115 */ 116 if (writable) { 117 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || 118 (bmval[2] & ~writable[2])) 119 return nfserr_inval; 120 } 121 122 return nfs_ok; 123 } 124 125 static __be32 126 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 127 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 128 { 129 __be32 status = nfs_ok; 130 131 if (open->op_create == NFS4_OPEN_CREATE) { 132 if (open->op_createmode == NFS4_CREATE_UNCHECKED 133 || open->op_createmode == NFS4_CREATE_GUARDED) 134 status = check_attr_support(rqstp, cstate, 135 open->op_bmval, nfsd_attrmask); 136 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 137 status = check_attr_support(rqstp, cstate, 138 open->op_bmval, nfsd41_ex_attrmask); 139 } 140 141 return status; 142 } 143 144 static int 145 is_create_with_attrs(struct nfsd4_open *open) 146 { 147 return open->op_create == NFS4_OPEN_CREATE 148 && (open->op_createmode == NFS4_CREATE_UNCHECKED 149 || open->op_createmode == NFS4_CREATE_GUARDED 150 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 151 } 152 153 /* 154 * if error occurs when setting the acl, just clear the acl bit 155 * in the returned attr bitmap. 156 */ 157 static void 158 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 159 struct nfs4_acl *acl, u32 *bmval) 160 { 161 __be32 status; 162 163 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 164 if (status) 165 /* 166 * We should probably fail the whole open at this point, 167 * but we've already created the file, so it's too late; 168 * So this seems the least of evils: 169 */ 170 bmval[0] &= ~FATTR4_WORD0_ACL; 171 } 172 173 static inline void 174 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 175 { 176 fh_put(dst); 177 dget(src->fh_dentry); 178 if (src->fh_export) 179 cache_get(&src->fh_export->h); 180 *dst = *src; 181 } 182 183 static __be32 184 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 185 { 186 __be32 status; 187 188 if (open->op_truncate && 189 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 190 return nfserr_inval; 191 192 accmode |= NFSD_MAY_READ_IF_EXEC; 193 194 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 195 accmode |= NFSD_MAY_READ; 196 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 197 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 198 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 199 accmode |= NFSD_MAY_WRITE; 200 201 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 202 203 return status; 204 } 205 206 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 207 { 208 umode_t mode = fh->fh_dentry->d_inode->i_mode; 209 210 if (S_ISREG(mode)) 211 return nfs_ok; 212 if (S_ISDIR(mode)) 213 return nfserr_isdir; 214 /* 215 * Using err_symlink as our catch-all case may look odd; but 216 * there's no other obvious error for this case in 4.0, and we 217 * happen to know that it will cause the linux v4 client to do 218 * the right thing on attempts to open something other than a 219 * regular file. 220 */ 221 return nfserr_symlink; 222 } 223 224 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 225 { 226 if (nfsd4_has_session(cstate)) 227 return; 228 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 229 &resfh->fh_handle); 230 } 231 232 static __be32 233 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 234 { 235 struct svc_fh *current_fh = &cstate->current_fh; 236 struct svc_fh *resfh; 237 int accmode; 238 __be32 status; 239 240 resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 241 if (!resfh) 242 return nfserr_jukebox; 243 fh_init(resfh, NFS4_FHSIZE); 244 open->op_truncate = 0; 245 246 if (open->op_create) { 247 /* FIXME: check session persistence and pnfs flags. 248 * The nfsv4.1 spec requires the following semantics: 249 * 250 * Persistent | pNFS | Server REQUIRED | Client Allowed 251 * Reply Cache | server | | 252 * -------------+--------+-----------------+-------------------- 253 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 254 * | | | (SHOULD) 255 * | | and EXCLUSIVE4 | or EXCLUSIVE4 256 * | | | (SHOULD NOT) 257 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 258 * yes | no | GUARDED4 | GUARDED4 259 * yes | yes | GUARDED4 | GUARDED4 260 */ 261 262 /* 263 * Note: create modes (UNCHECKED,GUARDED...) are the same 264 * in NFSv4 as in v3 except EXCLUSIVE4_1. 265 */ 266 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, 267 open->op_fname.len, &open->op_iattr, 268 resfh, open->op_createmode, 269 (u32 *)open->op_verf.data, 270 &open->op_truncate, &open->op_created); 271 272 if (!status && open->op_label.len) 273 nfsd4_security_inode_setsecctx(resfh, &open->op_label, open->op_bmval); 274 275 /* 276 * Following rfc 3530 14.2.16, use the returned bitmask 277 * to indicate which attributes we used to store the 278 * verifier: 279 */ 280 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) 281 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | 282 FATTR4_WORD1_TIME_MODIFY); 283 } else { 284 status = nfsd_lookup(rqstp, current_fh, 285 open->op_fname.data, open->op_fname.len, resfh); 286 fh_unlock(current_fh); 287 } 288 if (status) 289 goto out; 290 status = nfsd_check_obj_isreg(resfh); 291 if (status) 292 goto out; 293 294 if (is_create_with_attrs(open) && open->op_acl != NULL) 295 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval); 296 297 nfsd4_set_open_owner_reply_cache(cstate, open, resfh); 298 accmode = NFSD_MAY_NOP; 299 if (open->op_created || 300 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 301 accmode |= NFSD_MAY_OWNER_OVERRIDE; 302 status = do_open_permission(rqstp, resfh, open, accmode); 303 set_change_info(&open->op_cinfo, current_fh); 304 fh_dup2(current_fh, resfh); 305 out: 306 fh_put(resfh); 307 kfree(resfh); 308 return status; 309 } 310 311 static __be32 312 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 313 { 314 struct svc_fh *current_fh = &cstate->current_fh; 315 __be32 status; 316 int accmode = 0; 317 318 /* We don't know the target directory, and therefore can not 319 * set the change info 320 */ 321 322 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 323 324 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 325 326 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 327 (open->op_iattr.ia_size == 0); 328 /* 329 * In the delegation case, the client is telling us about an 330 * open that it *already* performed locally, some time ago. We 331 * should let it succeed now if possible. 332 * 333 * In the case of a CLAIM_FH open, on the other hand, the client 334 * may be counting on us to enforce permissions (the Linux 4.1 335 * client uses this for normal opens, for example). 336 */ 337 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 338 accmode = NFSD_MAY_OWNER_OVERRIDE; 339 340 status = do_open_permission(rqstp, current_fh, open, accmode); 341 342 return status; 343 } 344 345 static void 346 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 347 { 348 struct nfsd4_sessionid *sid = 349 (struct nfsd4_sessionid *)session->se_sessionid.data; 350 351 clid->cl_boot = sid->clientid.cl_boot; 352 clid->cl_id = sid->clientid.cl_id; 353 } 354 355 static __be32 356 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 357 struct nfsd4_open *open) 358 { 359 __be32 status; 360 struct nfsd4_compoundres *resp; 361 struct net *net = SVC_NET(rqstp); 362 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 363 364 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 365 (int)open->op_fname.len, open->op_fname.data, 366 open->op_openowner); 367 368 /* This check required by spec. */ 369 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 370 return nfserr_inval; 371 372 open->op_created = 0; 373 /* 374 * RFC5661 18.51.3 375 * Before RECLAIM_COMPLETE done, server should deny new lock 376 */ 377 if (nfsd4_has_session(cstate) && 378 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 379 &cstate->session->se_client->cl_flags) && 380 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 381 return nfserr_grace; 382 383 if (nfsd4_has_session(cstate)) 384 copy_clientid(&open->op_clientid, cstate->session); 385 386 nfs4_lock_state(); 387 388 /* check seqid for replay. set nfs4_owner */ 389 resp = rqstp->rq_resp; 390 status = nfsd4_process_open1(&resp->cstate, open, nn); 391 if (status == nfserr_replay_me) { 392 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 393 fh_put(&cstate->current_fh); 394 fh_copy_shallow(&cstate->current_fh.fh_handle, 395 &rp->rp_openfh); 396 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 397 if (status) 398 dprintk("nfsd4_open: replay failed" 399 " restoring previous filehandle\n"); 400 else 401 status = nfserr_replay_me; 402 } 403 if (status) 404 goto out; 405 if (open->op_xdr_error) { 406 status = open->op_xdr_error; 407 goto out; 408 } 409 410 status = nfsd4_check_open_attributes(rqstp, cstate, open); 411 if (status) 412 goto out; 413 414 /* Openowner is now set, so sequence id will get bumped. Now we need 415 * these checks before we do any creates: */ 416 status = nfserr_grace; 417 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 418 goto out; 419 status = nfserr_no_grace; 420 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 421 goto out; 422 423 switch (open->op_claim_type) { 424 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 425 case NFS4_OPEN_CLAIM_NULL: 426 status = do_open_lookup(rqstp, cstate, open); 427 if (status) 428 goto out; 429 break; 430 case NFS4_OPEN_CLAIM_PREVIOUS: 431 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 432 status = nfs4_check_open_reclaim(&open->op_clientid, 433 cstate->minorversion, 434 nn); 435 if (status) 436 goto out; 437 case NFS4_OPEN_CLAIM_FH: 438 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 439 status = do_open_fhandle(rqstp, cstate, open); 440 if (status) 441 goto out; 442 break; 443 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 444 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 445 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 446 dprintk("NFSD: unsupported OPEN claim type %d\n", 447 open->op_claim_type); 448 status = nfserr_notsupp; 449 goto out; 450 default: 451 dprintk("NFSD: Invalid OPEN claim type %d\n", 452 open->op_claim_type); 453 status = nfserr_inval; 454 goto out; 455 } 456 /* 457 * nfsd4_process_open2() does the actual opening of the file. If 458 * successful, it (1) truncates the file if open->op_truncate was 459 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 460 */ 461 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open); 462 WARN_ON(status && open->op_created); 463 out: 464 nfsd4_cleanup_open_state(open, status); 465 if (open->op_openowner && !nfsd4_has_session(cstate)) 466 cstate->replay_owner = &open->op_openowner->oo_owner; 467 nfsd4_bump_seqid(cstate, status); 468 if (!cstate->replay_owner) 469 nfs4_unlock_state(); 470 return status; 471 } 472 473 /* 474 * OPEN is the only seqid-mutating operation whose decoding can fail 475 * with a seqid-mutating error (specifically, decoding of user names in 476 * the attributes). Therefore we have to do some processing to look up 477 * the stateowner so that we can bump the seqid. 478 */ 479 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 480 { 481 struct nfsd4_open *open = (struct nfsd4_open *)&op->u; 482 483 if (!seqid_mutating_err(ntohl(op->status))) 484 return op->status; 485 if (nfsd4_has_session(cstate)) 486 return op->status; 487 open->op_xdr_error = op->status; 488 return nfsd4_open(rqstp, cstate, open); 489 } 490 491 /* 492 * filehandle-manipulating ops. 493 */ 494 static __be32 495 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 496 struct svc_fh **getfh) 497 { 498 if (!cstate->current_fh.fh_dentry) 499 return nfserr_nofilehandle; 500 501 *getfh = &cstate->current_fh; 502 return nfs_ok; 503 } 504 505 static __be32 506 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 507 struct nfsd4_putfh *putfh) 508 { 509 fh_put(&cstate->current_fh); 510 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 511 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 512 putfh->pf_fhlen); 513 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 514 } 515 516 static __be32 517 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 518 void *arg) 519 { 520 __be32 status; 521 522 fh_put(&cstate->current_fh); 523 status = exp_pseudoroot(rqstp, &cstate->current_fh); 524 return status; 525 } 526 527 static __be32 528 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 529 void *arg) 530 { 531 if (!cstate->save_fh.fh_dentry) 532 return nfserr_restorefh; 533 534 fh_dup2(&cstate->current_fh, &cstate->save_fh); 535 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 536 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 537 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 538 } 539 return nfs_ok; 540 } 541 542 static __be32 543 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 544 void *arg) 545 { 546 if (!cstate->current_fh.fh_dentry) 547 return nfserr_nofilehandle; 548 549 fh_dup2(&cstate->save_fh, &cstate->current_fh); 550 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 551 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 552 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 553 } 554 return nfs_ok; 555 } 556 557 /* 558 * misc nfsv4 ops 559 */ 560 static __be32 561 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 562 struct nfsd4_access *access) 563 { 564 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 565 return nfserr_inval; 566 567 access->ac_resp_access = access->ac_req_access; 568 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 569 &access->ac_supported); 570 } 571 572 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 573 { 574 __be32 verf[2]; 575 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 576 577 verf[0] = (__be32)nn->nfssvc_boot.tv_sec; 578 verf[1] = (__be32)nn->nfssvc_boot.tv_usec; 579 memcpy(verifier->data, verf, sizeof(verifier->data)); 580 } 581 582 static __be32 583 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 584 struct nfsd4_commit *commit) 585 { 586 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 587 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 588 commit->co_count); 589 } 590 591 static __be32 592 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 593 struct nfsd4_create *create) 594 { 595 struct svc_fh resfh; 596 __be32 status; 597 dev_t rdev; 598 599 fh_init(&resfh, NFS4_FHSIZE); 600 601 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 602 NFSD_MAY_CREATE); 603 if (status) 604 return status; 605 606 status = check_attr_support(rqstp, cstate, create->cr_bmval, 607 nfsd_attrmask); 608 if (status) 609 return status; 610 611 switch (create->cr_type) { 612 case NF4LNK: 613 /* ugh! we have to null-terminate the linktext, or 614 * vfs_symlink() will choke. it is always safe to 615 * null-terminate by brute force, since at worst we 616 * will overwrite the first byte of the create namelen 617 * in the XDR buffer, which has already been extracted 618 * during XDR decode. 619 */ 620 create->cr_linkname[create->cr_linklen] = 0; 621 622 status = nfsd_symlink(rqstp, &cstate->current_fh, 623 create->cr_name, create->cr_namelen, 624 create->cr_linkname, create->cr_linklen, 625 &resfh, &create->cr_iattr); 626 break; 627 628 case NF4BLK: 629 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 630 if (MAJOR(rdev) != create->cr_specdata1 || 631 MINOR(rdev) != create->cr_specdata2) 632 return nfserr_inval; 633 status = nfsd_create(rqstp, &cstate->current_fh, 634 create->cr_name, create->cr_namelen, 635 &create->cr_iattr, S_IFBLK, rdev, &resfh); 636 break; 637 638 case NF4CHR: 639 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 640 if (MAJOR(rdev) != create->cr_specdata1 || 641 MINOR(rdev) != create->cr_specdata2) 642 return nfserr_inval; 643 status = nfsd_create(rqstp, &cstate->current_fh, 644 create->cr_name, create->cr_namelen, 645 &create->cr_iattr,S_IFCHR, rdev, &resfh); 646 break; 647 648 case NF4SOCK: 649 status = nfsd_create(rqstp, &cstate->current_fh, 650 create->cr_name, create->cr_namelen, 651 &create->cr_iattr, S_IFSOCK, 0, &resfh); 652 break; 653 654 case NF4FIFO: 655 status = nfsd_create(rqstp, &cstate->current_fh, 656 create->cr_name, create->cr_namelen, 657 &create->cr_iattr, S_IFIFO, 0, &resfh); 658 break; 659 660 case NF4DIR: 661 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 662 status = nfsd_create(rqstp, &cstate->current_fh, 663 create->cr_name, create->cr_namelen, 664 &create->cr_iattr, S_IFDIR, 0, &resfh); 665 break; 666 667 default: 668 status = nfserr_badtype; 669 } 670 671 if (status) 672 goto out; 673 674 if (create->cr_label.len) 675 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 676 677 if (create->cr_acl != NULL) 678 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 679 create->cr_bmval); 680 681 fh_unlock(&cstate->current_fh); 682 set_change_info(&create->cr_cinfo, &cstate->current_fh); 683 fh_dup2(&cstate->current_fh, &resfh); 684 out: 685 fh_put(&resfh); 686 return status; 687 } 688 689 static __be32 690 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 691 struct nfsd4_getattr *getattr) 692 { 693 __be32 status; 694 695 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 696 if (status) 697 return status; 698 699 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 700 return nfserr_inval; 701 702 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 703 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 704 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 705 706 getattr->ga_fhp = &cstate->current_fh; 707 return nfs_ok; 708 } 709 710 static __be32 711 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 712 struct nfsd4_link *link) 713 { 714 __be32 status = nfserr_nofilehandle; 715 716 if (!cstate->save_fh.fh_dentry) 717 return status; 718 status = nfsd_link(rqstp, &cstate->current_fh, 719 link->li_name, link->li_namelen, &cstate->save_fh); 720 if (!status) 721 set_change_info(&link->li_cinfo, &cstate->current_fh); 722 return status; 723 } 724 725 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 726 { 727 struct svc_fh tmp_fh; 728 __be32 ret; 729 730 fh_init(&tmp_fh, NFS4_FHSIZE); 731 ret = exp_pseudoroot(rqstp, &tmp_fh); 732 if (ret) 733 return ret; 734 if (tmp_fh.fh_dentry == fh->fh_dentry) { 735 fh_put(&tmp_fh); 736 return nfserr_noent; 737 } 738 fh_put(&tmp_fh); 739 return nfsd_lookup(rqstp, fh, "..", 2, fh); 740 } 741 742 static __be32 743 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 744 void *arg) 745 { 746 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 747 } 748 749 static __be32 750 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 751 struct nfsd4_lookup *lookup) 752 { 753 return nfsd_lookup(rqstp, &cstate->current_fh, 754 lookup->lo_name, lookup->lo_len, 755 &cstate->current_fh); 756 } 757 758 static __be32 759 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 760 struct nfsd4_read *read) 761 { 762 __be32 status; 763 764 /* no need to check permission - this will be done in nfsd_read() */ 765 766 read->rd_filp = NULL; 767 if (read->rd_offset >= OFFSET_MAX) 768 return nfserr_inval; 769 770 /* 771 * If we do a zero copy read, then a client will see read data 772 * that reflects the state of the file *after* performing the 773 * following compound. 774 * 775 * To ensure proper ordering, we therefore turn off zero copy if 776 * the client wants us to do more in this compound: 777 */ 778 if (!nfsd4_last_compound_op(rqstp)) 779 rqstp->rq_splice_ok = false; 780 781 nfs4_lock_state(); 782 /* check stateid */ 783 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 784 cstate, &read->rd_stateid, 785 RD_STATE, &read->rd_filp))) { 786 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 787 goto out; 788 } 789 if (read->rd_filp) 790 get_file(read->rd_filp); 791 status = nfs_ok; 792 out: 793 nfs4_unlock_state(); 794 read->rd_rqstp = rqstp; 795 read->rd_fhp = &cstate->current_fh; 796 return status; 797 } 798 799 static __be32 800 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 801 struct nfsd4_readdir *readdir) 802 { 803 u64 cookie = readdir->rd_cookie; 804 static const nfs4_verifier zeroverf; 805 806 /* no need to check permission - this will be done in nfsd_readdir() */ 807 808 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 809 return nfserr_inval; 810 811 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 812 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 813 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 814 815 if ((cookie == 1) || (cookie == 2) || 816 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 817 return nfserr_bad_cookie; 818 819 readdir->rd_rqstp = rqstp; 820 readdir->rd_fhp = &cstate->current_fh; 821 return nfs_ok; 822 } 823 824 static __be32 825 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 826 struct nfsd4_readlink *readlink) 827 { 828 readlink->rl_rqstp = rqstp; 829 readlink->rl_fhp = &cstate->current_fh; 830 return nfs_ok; 831 } 832 833 static __be32 834 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 835 struct nfsd4_remove *remove) 836 { 837 __be32 status; 838 839 if (locks_in_grace(SVC_NET(rqstp))) 840 return nfserr_grace; 841 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 842 remove->rm_name, remove->rm_namelen); 843 if (!status) { 844 fh_unlock(&cstate->current_fh); 845 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 846 } 847 return status; 848 } 849 850 static __be32 851 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 852 struct nfsd4_rename *rename) 853 { 854 __be32 status = nfserr_nofilehandle; 855 856 if (!cstate->save_fh.fh_dentry) 857 return status; 858 if (locks_in_grace(SVC_NET(rqstp)) && 859 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 860 return nfserr_grace; 861 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 862 rename->rn_snamelen, &cstate->current_fh, 863 rename->rn_tname, rename->rn_tnamelen); 864 if (status) 865 return status; 866 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 867 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 868 return nfs_ok; 869 } 870 871 static __be32 872 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 873 struct nfsd4_secinfo *secinfo) 874 { 875 struct svc_fh resfh; 876 struct svc_export *exp; 877 struct dentry *dentry; 878 __be32 err; 879 880 fh_init(&resfh, NFS4_FHSIZE); 881 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 882 if (err) 883 return err; 884 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 885 secinfo->si_name, secinfo->si_namelen, 886 &exp, &dentry); 887 if (err) 888 return err; 889 if (dentry->d_inode == NULL) { 890 exp_put(exp); 891 err = nfserr_noent; 892 } else 893 secinfo->si_exp = exp; 894 dput(dentry); 895 if (cstate->minorversion) 896 /* See rfc 5661 section 2.6.3.1.1.8 */ 897 fh_put(&cstate->current_fh); 898 return err; 899 } 900 901 static __be32 902 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 903 struct nfsd4_secinfo_no_name *sin) 904 { 905 __be32 err; 906 907 switch (sin->sin_style) { 908 case NFS4_SECINFO_STYLE4_CURRENT_FH: 909 break; 910 case NFS4_SECINFO_STYLE4_PARENT: 911 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 912 if (err) 913 return err; 914 break; 915 default: 916 return nfserr_inval; 917 } 918 exp_get(cstate->current_fh.fh_export); 919 sin->sin_exp = cstate->current_fh.fh_export; 920 fh_put(&cstate->current_fh); 921 return nfs_ok; 922 } 923 924 static __be32 925 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 926 struct nfsd4_setattr *setattr) 927 { 928 __be32 status = nfs_ok; 929 int err; 930 931 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 932 nfs4_lock_state(); 933 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 934 &setattr->sa_stateid, WR_STATE, NULL); 935 nfs4_unlock_state(); 936 if (status) { 937 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 938 return status; 939 } 940 } 941 err = fh_want_write(&cstate->current_fh); 942 if (err) 943 return nfserrno(err); 944 status = nfs_ok; 945 946 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 947 nfsd_attrmask); 948 if (status) 949 goto out; 950 951 if (setattr->sa_acl != NULL) 952 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 953 setattr->sa_acl); 954 if (status) 955 goto out; 956 if (setattr->sa_label.len) 957 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 958 &setattr->sa_label); 959 if (status) 960 goto out; 961 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 962 0, (time_t)0); 963 out: 964 fh_drop_write(&cstate->current_fh); 965 return status; 966 } 967 968 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 969 { 970 int i = 1; 971 int buflen = write->wr_buflen; 972 973 vec[0].iov_base = write->wr_head.iov_base; 974 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 975 buflen -= vec[0].iov_len; 976 977 while (buflen) { 978 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 979 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 980 buflen -= vec[i].iov_len; 981 i++; 982 } 983 return i; 984 } 985 986 static __be32 987 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 988 struct nfsd4_write *write) 989 { 990 stateid_t *stateid = &write->wr_stateid; 991 struct file *filp = NULL; 992 __be32 status = nfs_ok; 993 unsigned long cnt; 994 int nvecs; 995 996 /* no need to check permission - this will be done in nfsd_write() */ 997 998 if (write->wr_offset >= OFFSET_MAX) 999 return nfserr_inval; 1000 1001 nfs4_lock_state(); 1002 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 1003 cstate, stateid, WR_STATE, &filp); 1004 if (status) { 1005 nfs4_unlock_state(); 1006 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 1007 return status; 1008 } 1009 if (filp) 1010 get_file(filp); 1011 nfs4_unlock_state(); 1012 1013 cnt = write->wr_buflen; 1014 write->wr_how_written = write->wr_stable_how; 1015 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 1016 1017 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1018 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1019 1020 status = nfsd_write(rqstp, &cstate->current_fh, filp, 1021 write->wr_offset, rqstp->rq_vec, nvecs, 1022 &cnt, &write->wr_how_written); 1023 if (filp) 1024 fput(filp); 1025 1026 write->wr_bytes_written = cnt; 1027 1028 return status; 1029 } 1030 1031 /* This routine never returns NFS_OK! If there are no other errors, it 1032 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1033 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1034 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1035 */ 1036 static __be32 1037 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1038 struct nfsd4_verify *verify) 1039 { 1040 __be32 *buf, *p; 1041 int count; 1042 __be32 status; 1043 1044 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1045 if (status) 1046 return status; 1047 1048 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1049 if (status) 1050 return status; 1051 1052 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1053 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1054 return nfserr_inval; 1055 if (verify->ve_attrlen & 3) 1056 return nfserr_inval; 1057 1058 /* count in words: 1059 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1060 */ 1061 count = 4 + (verify->ve_attrlen >> 2); 1062 buf = kmalloc(count << 2, GFP_KERNEL); 1063 if (!buf) 1064 return nfserr_jukebox; 1065 1066 p = buf; 1067 status = nfsd4_encode_fattr(&cstate->current_fh, 1068 cstate->current_fh.fh_export, 1069 cstate->current_fh.fh_dentry, &p, 1070 count, verify->ve_bmval, 1071 rqstp, 0); 1072 /* 1073 * If nfsd4_encode_fattr() ran out of space, assume that's because 1074 * the attributes are longer (hence different) than those given: 1075 */ 1076 if (status == nfserr_resource) 1077 status = nfserr_not_same; 1078 if (status) 1079 goto out_kfree; 1080 1081 /* skip bitmap */ 1082 p = buf + 1 + ntohl(buf[0]); 1083 status = nfserr_not_same; 1084 if (ntohl(*p++) != verify->ve_attrlen) 1085 goto out_kfree; 1086 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1087 status = nfserr_same; 1088 1089 out_kfree: 1090 kfree(buf); 1091 return status; 1092 } 1093 1094 static __be32 1095 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1096 struct nfsd4_verify *verify) 1097 { 1098 __be32 status; 1099 1100 status = _nfsd4_verify(rqstp, cstate, verify); 1101 return status == nfserr_not_same ? nfs_ok : status; 1102 } 1103 1104 static __be32 1105 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1106 struct nfsd4_verify *verify) 1107 { 1108 __be32 status; 1109 1110 status = _nfsd4_verify(rqstp, cstate, verify); 1111 return status == nfserr_same ? nfs_ok : status; 1112 } 1113 1114 /* 1115 * NULL call. 1116 */ 1117 static __be32 1118 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1119 { 1120 return nfs_ok; 1121 } 1122 1123 static inline void nfsd4_increment_op_stats(u32 opnum) 1124 { 1125 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1126 nfsdstats.nfs4_opcount[opnum]++; 1127 } 1128 1129 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1130 void *); 1131 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1132 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1133 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1134 1135 enum nfsd4_op_flags { 1136 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1137 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1138 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1139 /* For rfc 5661 section 2.6.3.1.1: */ 1140 OP_HANDLES_WRONGSEC = 1 << 3, 1141 OP_IS_PUTFH_LIKE = 1 << 4, 1142 /* 1143 * These are the ops whose result size we estimate before 1144 * encoding, to avoid performing an op then not being able to 1145 * respond or cache a response. This includes writes and setattrs 1146 * as well as the operations usually called "nonidempotent": 1147 */ 1148 OP_MODIFIES_SOMETHING = 1 << 5, 1149 /* 1150 * Cache compounds containing these ops in the xid-based drc: 1151 * We use the DRC for compounds containing non-idempotent 1152 * operations, *except* those that are 4.1-specific (since 1153 * sessions provide their own EOS), and except for stateful 1154 * operations other than setclientid and setclientid_confirm 1155 * (since sequence numbers provide EOS for open, lock, etc in 1156 * the v4.0 case). 1157 */ 1158 OP_CACHEME = 1 << 6, 1159 /* 1160 * These are ops which clear current state id. 1161 */ 1162 OP_CLEAR_STATEID = 1 << 7, 1163 }; 1164 1165 struct nfsd4_operation { 1166 nfsd4op_func op_func; 1167 u32 op_flags; 1168 char *op_name; 1169 /* Try to get response size before operation */ 1170 nfsd4op_rsize op_rsize_bop; 1171 stateid_getter op_get_currentstateid; 1172 stateid_setter op_set_currentstateid; 1173 }; 1174 1175 static struct nfsd4_operation nfsd4_ops[]; 1176 1177 #ifdef NFSD_DEBUG 1178 static const char *nfsd4_op_name(unsigned opnum); 1179 #endif 1180 1181 /* 1182 * Enforce NFSv4.1 COMPOUND ordering rules: 1183 * 1184 * Also note, enforced elsewhere: 1185 * - SEQUENCE other than as first op results in 1186 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1187 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1188 * (Enforced in nfsd4_bind_conn_to_session().) 1189 * - DESTROY_SESSION must be the final operation in a compound, if 1190 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1191 * (Enforced in nfsd4_destroy_session().) 1192 */ 1193 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1194 { 1195 struct nfsd4_op *op = &args->ops[0]; 1196 1197 /* These ordering requirements don't apply to NFSv4.0: */ 1198 if (args->minorversion == 0) 1199 return nfs_ok; 1200 /* This is weird, but OK, not our problem: */ 1201 if (args->opcnt == 0) 1202 return nfs_ok; 1203 if (op->status == nfserr_op_illegal) 1204 return nfs_ok; 1205 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1206 return nfserr_op_not_in_session; 1207 if (op->opnum == OP_SEQUENCE) 1208 return nfs_ok; 1209 if (args->opcnt != 1) 1210 return nfserr_not_only_op; 1211 return nfs_ok; 1212 } 1213 1214 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1215 { 1216 return &nfsd4_ops[op->opnum]; 1217 } 1218 1219 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1220 { 1221 return OPDESC(op)->op_flags & OP_CACHEME; 1222 } 1223 1224 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1225 { 1226 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1227 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1228 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1229 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1230 struct nfsd4_operation *thisd; 1231 struct nfsd4_operation *nextd; 1232 1233 thisd = OPDESC(this); 1234 /* 1235 * Most ops check wronsec on our own; only the putfh-like ops 1236 * have special rules. 1237 */ 1238 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1239 return false; 1240 /* 1241 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1242 * put-filehandle operation if we're not going to use the 1243 * result: 1244 */ 1245 if (argp->opcnt == resp->opcnt) 1246 return false; 1247 1248 nextd = OPDESC(next); 1249 /* 1250 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1251 * errors themselves as necessary; others should check for them 1252 * now: 1253 */ 1254 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1255 } 1256 1257 /* 1258 * COMPOUND call. 1259 */ 1260 static __be32 1261 nfsd4_proc_compound(struct svc_rqst *rqstp, 1262 struct nfsd4_compoundargs *args, 1263 struct nfsd4_compoundres *resp) 1264 { 1265 struct nfsd4_op *op; 1266 struct nfsd4_operation *opdesc; 1267 struct nfsd4_compound_state *cstate = &resp->cstate; 1268 int slack_bytes; 1269 u32 plen = 0; 1270 __be32 status; 1271 1272 resp->xbuf = &rqstp->rq_res; 1273 resp->p = rqstp->rq_res.head[0].iov_base + 1274 rqstp->rq_res.head[0].iov_len; 1275 resp->tagp = resp->p; 1276 /* reserve space for: taglen, tag, and opcnt */ 1277 resp->p += 2 + XDR_QUADLEN(args->taglen); 1278 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; 1279 resp->taglen = args->taglen; 1280 resp->tag = args->tag; 1281 resp->opcnt = 0; 1282 resp->rqstp = rqstp; 1283 resp->cstate.minorversion = args->minorversion; 1284 resp->cstate.replay_owner = NULL; 1285 resp->cstate.session = NULL; 1286 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); 1287 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); 1288 /* 1289 * Don't use the deferral mechanism for NFSv4; compounds make it 1290 * too hard to avoid non-idempotency problems. 1291 */ 1292 rqstp->rq_usedeferral = 0; 1293 1294 /* 1295 * According to RFC3010, this takes precedence over all other errors. 1296 */ 1297 status = nfserr_minor_vers_mismatch; 1298 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1299 goto out; 1300 1301 status = nfs41_check_op_ordering(args); 1302 if (status) { 1303 op = &args->ops[0]; 1304 op->status = status; 1305 goto encode_op; 1306 } 1307 1308 while (!status && resp->opcnt < args->opcnt) { 1309 op = &args->ops[resp->opcnt++]; 1310 1311 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1312 resp->opcnt, args->opcnt, op->opnum, 1313 nfsd4_op_name(op->opnum)); 1314 /* 1315 * The XDR decode routines may have pre-set op->status; 1316 * for example, if there is a miscellaneous XDR error 1317 * it will be set to nfserr_bad_xdr. 1318 */ 1319 if (op->status) { 1320 if (op->opnum == OP_OPEN) 1321 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1322 goto encode_op; 1323 } 1324 1325 /* We must be able to encode a successful response to 1326 * this operation, with enough room left over to encode a 1327 * failed response to the next operation. If we don't 1328 * have enough room, fail with ERR_RESOURCE. 1329 */ 1330 slack_bytes = (char *)resp->end - (char *)resp->p; 1331 if (slack_bytes < COMPOUND_SLACK_SPACE 1332 + COMPOUND_ERR_SLACK_SPACE) { 1333 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); 1334 op->status = nfserr_resource; 1335 goto encode_op; 1336 } 1337 1338 opdesc = OPDESC(op); 1339 1340 if (!cstate->current_fh.fh_dentry) { 1341 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1342 op->status = nfserr_nofilehandle; 1343 goto encode_op; 1344 } 1345 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && 1346 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1347 op->status = nfserr_moved; 1348 goto encode_op; 1349 } 1350 1351 /* If op is non-idempotent */ 1352 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1353 plen = opdesc->op_rsize_bop(rqstp, op); 1354 op->status = nfsd4_check_resp_size(resp, plen); 1355 } 1356 1357 if (op->status) 1358 goto encode_op; 1359 1360 if (opdesc->op_get_currentstateid) 1361 opdesc->op_get_currentstateid(cstate, &op->u); 1362 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1363 1364 if (!op->status) { 1365 if (opdesc->op_set_currentstateid) 1366 opdesc->op_set_currentstateid(cstate, &op->u); 1367 1368 if (opdesc->op_flags & OP_CLEAR_STATEID) 1369 clear_current_stateid(cstate); 1370 1371 if (need_wrongsec_check(rqstp)) 1372 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp); 1373 } 1374 1375 encode_op: 1376 /* Only from SEQUENCE */ 1377 if (resp->cstate.status == nfserr_replay_cache) { 1378 dprintk("%s NFS4.1 replay from cache\n", __func__); 1379 status = op->status; 1380 goto out; 1381 } 1382 if (op->status == nfserr_replay_me) { 1383 op->replay = &cstate->replay_owner->so_replay; 1384 nfsd4_encode_replay(resp, op); 1385 status = op->status = op->replay->rp_status; 1386 } else { 1387 nfsd4_encode_operation(resp, op); 1388 status = op->status; 1389 } 1390 1391 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1392 args->ops, args->opcnt, resp->opcnt, op->opnum, 1393 be32_to_cpu(status)); 1394 1395 if (cstate->replay_owner) { 1396 nfs4_unlock_state(); 1397 cstate->replay_owner = NULL; 1398 } 1399 /* XXX Ugh, we need to get rid of this kind of special case: */ 1400 if (op->opnum == OP_READ && op->u.read.rd_filp) 1401 fput(op->u.read.rd_filp); 1402 1403 nfsd4_increment_op_stats(op->opnum); 1404 } 1405 1406 resp->cstate.status = status; 1407 fh_put(&resp->cstate.current_fh); 1408 fh_put(&resp->cstate.save_fh); 1409 BUG_ON(resp->cstate.replay_owner); 1410 out: 1411 /* Reset deferral mechanism for RPC deferrals */ 1412 rqstp->rq_usedeferral = 1; 1413 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1414 return status; 1415 } 1416 1417 #define op_encode_hdr_size (2) 1418 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1419 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1420 #define op_encode_change_info_maxsz (5) 1421 #define nfs4_fattr_bitmap_maxsz (4) 1422 1423 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1424 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1425 1426 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1427 1428 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1429 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1430 op_encode_ace_maxsz) 1431 1432 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1433 1434 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1435 { 1436 return (op_encode_hdr_size) * sizeof(__be32); 1437 } 1438 1439 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1440 { 1441 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1442 } 1443 1444 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1445 { 1446 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1447 } 1448 1449 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1450 { 1451 return (op_encode_hdr_size + op_encode_change_info_maxsz 1452 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1453 } 1454 1455 static inline u32 nfsd4_link_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_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1462 { 1463 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1464 * sizeof(__be32); 1465 } 1466 1467 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1468 { 1469 return (op_encode_hdr_size + op_encode_stateid_maxsz 1470 + op_encode_change_info_maxsz + 1 1471 + nfs4_fattr_bitmap_maxsz 1472 + op_encode_delegation_maxsz) * sizeof(__be32); 1473 } 1474 1475 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1476 { 1477 u32 maxcount = 0, rlen = 0; 1478 1479 maxcount = svc_max_payload(rqstp); 1480 rlen = op->u.read.rd_length; 1481 1482 if (rlen > maxcount) 1483 rlen = maxcount; 1484 1485 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen; 1486 } 1487 1488 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1489 { 1490 u32 rlen = op->u.readdir.rd_maxcount; 1491 1492 if (rlen > PAGE_SIZE) 1493 rlen = PAGE_SIZE; 1494 1495 return (op_encode_hdr_size + op_encode_verifier_maxsz) 1496 * sizeof(__be32) + rlen; 1497 } 1498 1499 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1500 { 1501 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1502 * sizeof(__be32); 1503 } 1504 1505 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1506 { 1507 return (op_encode_hdr_size + op_encode_change_info_maxsz 1508 + op_encode_change_info_maxsz) * sizeof(__be32); 1509 } 1510 1511 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1512 { 1513 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1514 } 1515 1516 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1517 { 1518 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32); 1519 } 1520 1521 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1522 { 1523 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1524 } 1525 1526 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1527 { 1528 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1529 1 + 1 + /* eir_flags, spr_how */\ 1530 4 + /* spo_must_enforce & _allow with bitmap */\ 1531 2 + /*eir_server_owner.so_minor_id */\ 1532 /* eir_server_owner.so_major_id<> */\ 1533 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1534 /* eir_server_scope<> */\ 1535 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1536 1 + /* eir_server_impl_id array length */\ 1537 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1538 } 1539 1540 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1541 { 1542 return (op_encode_hdr_size + \ 1543 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1544 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1545 } 1546 1547 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1548 { 1549 return (op_encode_hdr_size + \ 1550 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1551 2 + /* csr_sequence, csr_flags */\ 1552 op_encode_channel_attrs_maxsz + \ 1553 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1554 } 1555 1556 static struct nfsd4_operation nfsd4_ops[] = { 1557 [OP_ACCESS] = { 1558 .op_func = (nfsd4op_func)nfsd4_access, 1559 .op_name = "OP_ACCESS", 1560 }, 1561 [OP_CLOSE] = { 1562 .op_func = (nfsd4op_func)nfsd4_close, 1563 .op_flags = OP_MODIFIES_SOMETHING, 1564 .op_name = "OP_CLOSE", 1565 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1566 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 1567 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 1568 }, 1569 [OP_COMMIT] = { 1570 .op_func = (nfsd4op_func)nfsd4_commit, 1571 .op_flags = OP_MODIFIES_SOMETHING, 1572 .op_name = "OP_COMMIT", 1573 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 1574 }, 1575 [OP_CREATE] = { 1576 .op_func = (nfsd4op_func)nfsd4_create, 1577 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 1578 .op_name = "OP_CREATE", 1579 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 1580 }, 1581 [OP_DELEGRETURN] = { 1582 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1583 .op_flags = OP_MODIFIES_SOMETHING, 1584 .op_name = "OP_DELEGRETURN", 1585 .op_rsize_bop = nfsd4_only_status_rsize, 1586 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 1587 }, 1588 [OP_GETATTR] = { 1589 .op_func = (nfsd4op_func)nfsd4_getattr, 1590 .op_flags = ALLOWED_ON_ABSENT_FS, 1591 .op_name = "OP_GETATTR", 1592 }, 1593 [OP_GETFH] = { 1594 .op_func = (nfsd4op_func)nfsd4_getfh, 1595 .op_name = "OP_GETFH", 1596 }, 1597 [OP_LINK] = { 1598 .op_func = (nfsd4op_func)nfsd4_link, 1599 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 1600 | OP_CACHEME, 1601 .op_name = "OP_LINK", 1602 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 1603 }, 1604 [OP_LOCK] = { 1605 .op_func = (nfsd4op_func)nfsd4_lock, 1606 .op_flags = OP_MODIFIES_SOMETHING, 1607 .op_name = "OP_LOCK", 1608 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 1609 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 1610 }, 1611 [OP_LOCKT] = { 1612 .op_func = (nfsd4op_func)nfsd4_lockt, 1613 .op_name = "OP_LOCKT", 1614 }, 1615 [OP_LOCKU] = { 1616 .op_func = (nfsd4op_func)nfsd4_locku, 1617 .op_flags = OP_MODIFIES_SOMETHING, 1618 .op_name = "OP_LOCKU", 1619 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1620 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 1621 }, 1622 [OP_LOOKUP] = { 1623 .op_func = (nfsd4op_func)nfsd4_lookup, 1624 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1625 .op_name = "OP_LOOKUP", 1626 }, 1627 [OP_LOOKUPP] = { 1628 .op_func = (nfsd4op_func)nfsd4_lookupp, 1629 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1630 .op_name = "OP_LOOKUPP", 1631 }, 1632 [OP_NVERIFY] = { 1633 .op_func = (nfsd4op_func)nfsd4_nverify, 1634 .op_name = "OP_NVERIFY", 1635 }, 1636 [OP_OPEN] = { 1637 .op_func = (nfsd4op_func)nfsd4_open, 1638 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1639 .op_name = "OP_OPEN", 1640 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 1641 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 1642 }, 1643 [OP_OPEN_CONFIRM] = { 1644 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1645 .op_flags = OP_MODIFIES_SOMETHING, 1646 .op_name = "OP_OPEN_CONFIRM", 1647 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1648 }, 1649 [OP_OPEN_DOWNGRADE] = { 1650 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1651 .op_flags = OP_MODIFIES_SOMETHING, 1652 .op_name = "OP_OPEN_DOWNGRADE", 1653 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1654 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 1655 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 1656 }, 1657 [OP_PUTFH] = { 1658 .op_func = (nfsd4op_func)nfsd4_putfh, 1659 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1660 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1661 | OP_CLEAR_STATEID, 1662 .op_name = "OP_PUTFH", 1663 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1664 }, 1665 [OP_PUTPUBFH] = { 1666 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1667 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1668 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1669 | OP_CLEAR_STATEID, 1670 .op_name = "OP_PUTPUBFH", 1671 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1672 }, 1673 [OP_PUTROOTFH] = { 1674 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1675 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1676 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1677 | OP_CLEAR_STATEID, 1678 .op_name = "OP_PUTROOTFH", 1679 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1680 }, 1681 [OP_READ] = { 1682 .op_func = (nfsd4op_func)nfsd4_read, 1683 .op_flags = OP_MODIFIES_SOMETHING, 1684 .op_name = "OP_READ", 1685 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 1686 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 1687 }, 1688 [OP_READDIR] = { 1689 .op_func = (nfsd4op_func)nfsd4_readdir, 1690 .op_flags = OP_MODIFIES_SOMETHING, 1691 .op_name = "OP_READDIR", 1692 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 1693 }, 1694 [OP_READLINK] = { 1695 .op_func = (nfsd4op_func)nfsd4_readlink, 1696 .op_name = "OP_READLINK", 1697 }, 1698 [OP_REMOVE] = { 1699 .op_func = (nfsd4op_func)nfsd4_remove, 1700 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1701 .op_name = "OP_REMOVE", 1702 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 1703 }, 1704 [OP_RENAME] = { 1705 .op_func = (nfsd4op_func)nfsd4_rename, 1706 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1707 .op_name = "OP_RENAME", 1708 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 1709 }, 1710 [OP_RENEW] = { 1711 .op_func = (nfsd4op_func)nfsd4_renew, 1712 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1713 | OP_MODIFIES_SOMETHING, 1714 .op_name = "OP_RENEW", 1715 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1716 1717 }, 1718 [OP_RESTOREFH] = { 1719 .op_func = (nfsd4op_func)nfsd4_restorefh, 1720 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1721 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 1722 .op_name = "OP_RESTOREFH", 1723 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1724 }, 1725 [OP_SAVEFH] = { 1726 .op_func = (nfsd4op_func)nfsd4_savefh, 1727 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1728 .op_name = "OP_SAVEFH", 1729 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1730 }, 1731 [OP_SECINFO] = { 1732 .op_func = (nfsd4op_func)nfsd4_secinfo, 1733 .op_flags = OP_HANDLES_WRONGSEC, 1734 .op_name = "OP_SECINFO", 1735 }, 1736 [OP_SETATTR] = { 1737 .op_func = (nfsd4op_func)nfsd4_setattr, 1738 .op_name = "OP_SETATTR", 1739 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1740 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 1741 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 1742 }, 1743 [OP_SETCLIENTID] = { 1744 .op_func = (nfsd4op_func)nfsd4_setclientid, 1745 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1746 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1747 .op_name = "OP_SETCLIENTID", 1748 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 1749 }, 1750 [OP_SETCLIENTID_CONFIRM] = { 1751 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1752 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1753 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1754 .op_name = "OP_SETCLIENTID_CONFIRM", 1755 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1756 }, 1757 [OP_VERIFY] = { 1758 .op_func = (nfsd4op_func)nfsd4_verify, 1759 .op_name = "OP_VERIFY", 1760 }, 1761 [OP_WRITE] = { 1762 .op_func = (nfsd4op_func)nfsd4_write, 1763 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1764 .op_name = "OP_WRITE", 1765 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 1766 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 1767 }, 1768 [OP_RELEASE_LOCKOWNER] = { 1769 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1770 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1771 | OP_MODIFIES_SOMETHING, 1772 .op_name = "OP_RELEASE_LOCKOWNER", 1773 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1774 }, 1775 1776 /* NFSv4.1 operations */ 1777 [OP_EXCHANGE_ID] = { 1778 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1779 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1780 | OP_MODIFIES_SOMETHING, 1781 .op_name = "OP_EXCHANGE_ID", 1782 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 1783 }, 1784 [OP_BACKCHANNEL_CTL] = { 1785 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 1786 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1787 .op_name = "OP_BACKCHANNEL_CTL", 1788 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1789 }, 1790 [OP_BIND_CONN_TO_SESSION] = { 1791 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 1792 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1793 | OP_MODIFIES_SOMETHING, 1794 .op_name = "OP_BIND_CONN_TO_SESSION", 1795 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 1796 }, 1797 [OP_CREATE_SESSION] = { 1798 .op_func = (nfsd4op_func)nfsd4_create_session, 1799 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1800 | OP_MODIFIES_SOMETHING, 1801 .op_name = "OP_CREATE_SESSION", 1802 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 1803 }, 1804 [OP_DESTROY_SESSION] = { 1805 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1806 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1807 | OP_MODIFIES_SOMETHING, 1808 .op_name = "OP_DESTROY_SESSION", 1809 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1810 }, 1811 [OP_SEQUENCE] = { 1812 .op_func = (nfsd4op_func)nfsd4_sequence, 1813 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1814 .op_name = "OP_SEQUENCE", 1815 }, 1816 [OP_DESTROY_CLIENTID] = { 1817 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 1818 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1819 | OP_MODIFIES_SOMETHING, 1820 .op_name = "OP_DESTROY_CLIENTID", 1821 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1822 }, 1823 [OP_RECLAIM_COMPLETE] = { 1824 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 1825 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1826 .op_name = "OP_RECLAIM_COMPLETE", 1827 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1828 }, 1829 [OP_SECINFO_NO_NAME] = { 1830 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 1831 .op_flags = OP_HANDLES_WRONGSEC, 1832 .op_name = "OP_SECINFO_NO_NAME", 1833 }, 1834 [OP_TEST_STATEID] = { 1835 .op_func = (nfsd4op_func)nfsd4_test_stateid, 1836 .op_flags = ALLOWED_WITHOUT_FH, 1837 .op_name = "OP_TEST_STATEID", 1838 }, 1839 [OP_FREE_STATEID] = { 1840 .op_func = (nfsd4op_func)nfsd4_free_stateid, 1841 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1842 .op_name = "OP_FREE_STATEID", 1843 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 1844 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1845 }, 1846 }; 1847 1848 #ifdef NFSD_DEBUG 1849 static const char *nfsd4_op_name(unsigned opnum) 1850 { 1851 if (opnum < ARRAY_SIZE(nfsd4_ops)) 1852 return nfsd4_ops[opnum].op_name; 1853 return "unknown_operation"; 1854 } 1855 #endif 1856 1857 #define nfsd4_voidres nfsd4_voidargs 1858 struct nfsd4_voidargs { int dummy; }; 1859 1860 static struct svc_procedure nfsd_procedures4[2] = { 1861 [NFSPROC4_NULL] = { 1862 .pc_func = (svc_procfunc) nfsd4_proc_null, 1863 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 1864 .pc_argsize = sizeof(struct nfsd4_voidargs), 1865 .pc_ressize = sizeof(struct nfsd4_voidres), 1866 .pc_cachetype = RC_NOCACHE, 1867 .pc_xdrressize = 1, 1868 }, 1869 [NFSPROC4_COMPOUND] = { 1870 .pc_func = (svc_procfunc) nfsd4_proc_compound, 1871 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 1872 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 1873 .pc_argsize = sizeof(struct nfsd4_compoundargs), 1874 .pc_ressize = sizeof(struct nfsd4_compoundres), 1875 .pc_release = nfsd4_release_compoundargs, 1876 .pc_cachetype = RC_NOCACHE, 1877 .pc_xdrressize = NFSD_BUFSIZE/4, 1878 }, 1879 }; 1880 1881 struct svc_version nfsd_version4 = { 1882 .vs_vers = 4, 1883 .vs_nproc = 2, 1884 .vs_proc = nfsd_procedures4, 1885 .vs_dispatch = nfsd_dispatch, 1886 .vs_xdrsize = NFS4_SVC_XDRSIZE, 1887 .vs_rpcb_optnl = 1, 1888 }; 1889 1890 /* 1891 * Local variables: 1892 * c-basic-offset: 8 1893 * End: 1894 */ 1895