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 #include "acl.h" 45 46 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 47 #include <linux/security.h> 48 49 static inline void 50 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 51 { 52 struct inode *inode = resfh->fh_dentry->d_inode; 53 int status; 54 55 mutex_lock(&inode->i_mutex); 56 status = security_inode_setsecctx(resfh->fh_dentry, 57 label->data, label->len); 58 mutex_unlock(&inode->i_mutex); 59 60 if (status) 61 /* 62 * XXX: We should really fail the whole open, but we may 63 * already have created a new file, so it may be too 64 * late. For now this seems the least of evils: 65 */ 66 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 67 68 return; 69 } 70 #else 71 static inline void 72 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 73 { } 74 #endif 75 76 #define NFSDDBG_FACILITY NFSDDBG_PROC 77 78 static u32 nfsd_attrmask[] = { 79 NFSD_WRITEABLE_ATTRS_WORD0, 80 NFSD_WRITEABLE_ATTRS_WORD1, 81 NFSD_WRITEABLE_ATTRS_WORD2 82 }; 83 84 static u32 nfsd41_ex_attrmask[] = { 85 NFSD_SUPPATTR_EXCLCREAT_WORD0, 86 NFSD_SUPPATTR_EXCLCREAT_WORD1, 87 NFSD_SUPPATTR_EXCLCREAT_WORD2 88 }; 89 90 static __be32 91 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 92 u32 *bmval, u32 *writable) 93 { 94 struct dentry *dentry = cstate->current_fh.fh_dentry; 95 96 /* 97 * Check about attributes are supported by the NFSv4 server or not. 98 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. 99 */ 100 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || 101 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || 102 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) 103 return nfserr_attrnotsupp; 104 105 /* 106 * Check FATTR4_WORD0_ACL can be supported 107 * in current environment or not. 108 */ 109 if (bmval[0] & FATTR4_WORD0_ACL) { 110 if (!IS_POSIXACL(dentry->d_inode)) 111 return nfserr_attrnotsupp; 112 } 113 114 /* 115 * According to spec, read-only attributes return ERR_INVAL. 116 */ 117 if (writable) { 118 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || 119 (bmval[2] & ~writable[2])) 120 return nfserr_inval; 121 } 122 123 return nfs_ok; 124 } 125 126 static __be32 127 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 128 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 129 { 130 __be32 status = nfs_ok; 131 132 if (open->op_create == NFS4_OPEN_CREATE) { 133 if (open->op_createmode == NFS4_CREATE_UNCHECKED 134 || open->op_createmode == NFS4_CREATE_GUARDED) 135 status = check_attr_support(rqstp, cstate, 136 open->op_bmval, nfsd_attrmask); 137 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 138 status = check_attr_support(rqstp, cstate, 139 open->op_bmval, nfsd41_ex_attrmask); 140 } 141 142 return status; 143 } 144 145 static int 146 is_create_with_attrs(struct nfsd4_open *open) 147 { 148 return open->op_create == NFS4_OPEN_CREATE 149 && (open->op_createmode == NFS4_CREATE_UNCHECKED 150 || open->op_createmode == NFS4_CREATE_GUARDED 151 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 152 } 153 154 /* 155 * if error occurs when setting the acl, just clear the acl bit 156 * in the returned attr bitmap. 157 */ 158 static void 159 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 160 struct nfs4_acl *acl, u32 *bmval) 161 { 162 __be32 status; 163 164 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 165 if (status) 166 /* 167 * We should probably fail the whole open at this point, 168 * but we've already created the file, so it's too late; 169 * So this seems the least of evils: 170 */ 171 bmval[0] &= ~FATTR4_WORD0_ACL; 172 } 173 174 static inline void 175 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 176 { 177 fh_put(dst); 178 dget(src->fh_dentry); 179 if (src->fh_export) 180 cache_get(&src->fh_export->h); 181 *dst = *src; 182 } 183 184 static __be32 185 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 186 { 187 __be32 status; 188 189 if (open->op_truncate && 190 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 191 return nfserr_inval; 192 193 accmode |= NFSD_MAY_READ_IF_EXEC; 194 195 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 196 accmode |= NFSD_MAY_READ; 197 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 198 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 199 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 200 accmode |= NFSD_MAY_WRITE; 201 202 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 203 204 return status; 205 } 206 207 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 208 { 209 umode_t mode = fh->fh_dentry->d_inode->i_mode; 210 211 if (S_ISREG(mode)) 212 return nfs_ok; 213 if (S_ISDIR(mode)) 214 return nfserr_isdir; 215 /* 216 * Using err_symlink as our catch-all case may look odd; but 217 * there's no other obvious error for this case in 4.0, and we 218 * happen to know that it will cause the linux v4 client to do 219 * the right thing on attempts to open something other than a 220 * regular file. 221 */ 222 return nfserr_symlink; 223 } 224 225 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 226 { 227 if (nfsd4_has_session(cstate)) 228 return; 229 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 230 &resfh->fh_handle); 231 } 232 233 static __be32 234 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 235 { 236 struct svc_fh *current_fh = &cstate->current_fh; 237 struct svc_fh *resfh; 238 int accmode; 239 __be32 status; 240 241 resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 242 if (!resfh) 243 return nfserr_jukebox; 244 fh_init(resfh, NFS4_FHSIZE); 245 open->op_truncate = 0; 246 247 if (open->op_create) { 248 /* FIXME: check session persistence and pnfs flags. 249 * The nfsv4.1 spec requires the following semantics: 250 * 251 * Persistent | pNFS | Server REQUIRED | Client Allowed 252 * Reply Cache | server | | 253 * -------------+--------+-----------------+-------------------- 254 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 255 * | | | (SHOULD) 256 * | | and EXCLUSIVE4 | or EXCLUSIVE4 257 * | | | (SHOULD NOT) 258 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 259 * yes | no | GUARDED4 | GUARDED4 260 * yes | yes | GUARDED4 | GUARDED4 261 */ 262 263 /* 264 * Note: create modes (UNCHECKED,GUARDED...) are the same 265 * in NFSv4 as in v3 except EXCLUSIVE4_1. 266 */ 267 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, 268 open->op_fname.len, &open->op_iattr, 269 resfh, open->op_createmode, 270 (u32 *)open->op_verf.data, 271 &open->op_truncate, &open->op_created); 272 273 if (!status && open->op_label.len) 274 nfsd4_security_inode_setsecctx(resfh, &open->op_label, open->op_bmval); 275 276 /* 277 * Following rfc 3530 14.2.16, use the returned bitmask 278 * to indicate which attributes we used to store the 279 * verifier: 280 */ 281 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) 282 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | 283 FATTR4_WORD1_TIME_MODIFY); 284 } else { 285 status = nfsd_lookup(rqstp, current_fh, 286 open->op_fname.data, open->op_fname.len, resfh); 287 fh_unlock(current_fh); 288 } 289 if (status) 290 goto out; 291 status = nfsd_check_obj_isreg(resfh); 292 if (status) 293 goto out; 294 295 if (is_create_with_attrs(open) && open->op_acl != NULL) 296 do_set_nfs4_acl(rqstp, resfh, open->op_acl, open->op_bmval); 297 298 nfsd4_set_open_owner_reply_cache(cstate, open, resfh); 299 accmode = NFSD_MAY_NOP; 300 if (open->op_created || 301 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 302 accmode |= NFSD_MAY_OWNER_OVERRIDE; 303 status = do_open_permission(rqstp, resfh, open, accmode); 304 set_change_info(&open->op_cinfo, current_fh); 305 fh_dup2(current_fh, resfh); 306 out: 307 fh_put(resfh); 308 kfree(resfh); 309 return status; 310 } 311 312 static __be32 313 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 314 { 315 struct svc_fh *current_fh = &cstate->current_fh; 316 __be32 status; 317 int accmode = 0; 318 319 /* We don't know the target directory, and therefore can not 320 * set the change info 321 */ 322 323 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 324 325 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 326 327 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 328 (open->op_iattr.ia_size == 0); 329 /* 330 * In the delegation case, the client is telling us about an 331 * open that it *already* performed locally, some time ago. We 332 * should let it succeed now if possible. 333 * 334 * In the case of a CLAIM_FH open, on the other hand, the client 335 * may be counting on us to enforce permissions (the Linux 4.1 336 * client uses this for normal opens, for example). 337 */ 338 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 339 accmode = NFSD_MAY_OWNER_OVERRIDE; 340 341 status = do_open_permission(rqstp, current_fh, open, accmode); 342 343 return status; 344 } 345 346 static void 347 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 348 { 349 struct nfsd4_sessionid *sid = 350 (struct nfsd4_sessionid *)session->se_sessionid.data; 351 352 clid->cl_boot = sid->clientid.cl_boot; 353 clid->cl_id = sid->clientid.cl_id; 354 } 355 356 static __be32 357 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 358 struct nfsd4_open *open) 359 { 360 __be32 status; 361 struct nfsd4_compoundres *resp; 362 struct net *net = SVC_NET(rqstp); 363 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 364 365 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 366 (int)open->op_fname.len, open->op_fname.data, 367 open->op_openowner); 368 369 /* This check required by spec. */ 370 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 371 return nfserr_inval; 372 373 open->op_created = 0; 374 /* 375 * RFC5661 18.51.3 376 * Before RECLAIM_COMPLETE done, server should deny new lock 377 */ 378 if (nfsd4_has_session(cstate) && 379 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 380 &cstate->session->se_client->cl_flags) && 381 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 382 return nfserr_grace; 383 384 if (nfsd4_has_session(cstate)) 385 copy_clientid(&open->op_clientid, cstate->session); 386 387 nfs4_lock_state(); 388 389 /* check seqid for replay. set nfs4_owner */ 390 resp = rqstp->rq_resp; 391 status = nfsd4_process_open1(&resp->cstate, open, nn); 392 if (status == nfserr_replay_me) { 393 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 394 fh_put(&cstate->current_fh); 395 fh_copy_shallow(&cstate->current_fh.fh_handle, 396 &rp->rp_openfh); 397 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 398 if (status) 399 dprintk("nfsd4_open: replay failed" 400 " restoring previous filehandle\n"); 401 else 402 status = nfserr_replay_me; 403 } 404 if (status) 405 goto out; 406 if (open->op_xdr_error) { 407 status = open->op_xdr_error; 408 goto out; 409 } 410 411 status = nfsd4_check_open_attributes(rqstp, cstate, open); 412 if (status) 413 goto out; 414 415 /* Openowner is now set, so sequence id will get bumped. Now we need 416 * these checks before we do any creates: */ 417 status = nfserr_grace; 418 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 419 goto out; 420 status = nfserr_no_grace; 421 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 422 goto out; 423 424 switch (open->op_claim_type) { 425 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 426 case NFS4_OPEN_CLAIM_NULL: 427 status = do_open_lookup(rqstp, cstate, open); 428 if (status) 429 goto out; 430 break; 431 case NFS4_OPEN_CLAIM_PREVIOUS: 432 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 433 status = nfs4_check_open_reclaim(&open->op_clientid, 434 cstate->minorversion, 435 nn); 436 if (status) 437 goto out; 438 case NFS4_OPEN_CLAIM_FH: 439 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 440 status = do_open_fhandle(rqstp, cstate, open); 441 if (status) 442 goto out; 443 break; 444 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 445 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 446 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 447 dprintk("NFSD: unsupported OPEN claim type %d\n", 448 open->op_claim_type); 449 status = nfserr_notsupp; 450 goto out; 451 default: 452 dprintk("NFSD: Invalid OPEN claim type %d\n", 453 open->op_claim_type); 454 status = nfserr_inval; 455 goto out; 456 } 457 /* 458 * nfsd4_process_open2() does the actual opening of the file. If 459 * successful, it (1) truncates the file if open->op_truncate was 460 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 461 */ 462 status = nfsd4_process_open2(rqstp, &cstate->current_fh, open); 463 WARN_ON(status && open->op_created); 464 out: 465 nfsd4_cleanup_open_state(open, status); 466 if (open->op_openowner && !nfsd4_has_session(cstate)) 467 cstate->replay_owner = &open->op_openowner->oo_owner; 468 nfsd4_bump_seqid(cstate, status); 469 if (!cstate->replay_owner) 470 nfs4_unlock_state(); 471 return status; 472 } 473 474 /* 475 * OPEN is the only seqid-mutating operation whose decoding can fail 476 * with a seqid-mutating error (specifically, decoding of user names in 477 * the attributes). Therefore we have to do some processing to look up 478 * the stateowner so that we can bump the seqid. 479 */ 480 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 481 { 482 struct nfsd4_open *open = (struct nfsd4_open *)&op->u; 483 484 if (!seqid_mutating_err(ntohl(op->status))) 485 return op->status; 486 if (nfsd4_has_session(cstate)) 487 return op->status; 488 open->op_xdr_error = op->status; 489 return nfsd4_open(rqstp, cstate, open); 490 } 491 492 /* 493 * filehandle-manipulating ops. 494 */ 495 static __be32 496 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 497 struct svc_fh **getfh) 498 { 499 if (!cstate->current_fh.fh_dentry) 500 return nfserr_nofilehandle; 501 502 *getfh = &cstate->current_fh; 503 return nfs_ok; 504 } 505 506 static __be32 507 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 508 struct nfsd4_putfh *putfh) 509 { 510 fh_put(&cstate->current_fh); 511 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 512 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 513 putfh->pf_fhlen); 514 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 515 } 516 517 static __be32 518 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 519 void *arg) 520 { 521 __be32 status; 522 523 fh_put(&cstate->current_fh); 524 status = exp_pseudoroot(rqstp, &cstate->current_fh); 525 return status; 526 } 527 528 static __be32 529 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 530 void *arg) 531 { 532 if (!cstate->save_fh.fh_dentry) 533 return nfserr_restorefh; 534 535 fh_dup2(&cstate->current_fh, &cstate->save_fh); 536 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 537 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 538 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 539 } 540 return nfs_ok; 541 } 542 543 static __be32 544 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 545 void *arg) 546 { 547 if (!cstate->current_fh.fh_dentry) 548 return nfserr_nofilehandle; 549 550 fh_dup2(&cstate->save_fh, &cstate->current_fh); 551 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 552 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 553 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 554 } 555 return nfs_ok; 556 } 557 558 /* 559 * misc nfsv4 ops 560 */ 561 static __be32 562 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 563 struct nfsd4_access *access) 564 { 565 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 566 return nfserr_inval; 567 568 access->ac_resp_access = access->ac_req_access; 569 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 570 &access->ac_supported); 571 } 572 573 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 574 { 575 __be32 verf[2]; 576 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 577 578 verf[0] = (__be32)nn->nfssvc_boot.tv_sec; 579 verf[1] = (__be32)nn->nfssvc_boot.tv_usec; 580 memcpy(verifier->data, verf, sizeof(verifier->data)); 581 } 582 583 static __be32 584 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 585 struct nfsd4_commit *commit) 586 { 587 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 588 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 589 commit->co_count); 590 } 591 592 static __be32 593 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 594 struct nfsd4_create *create) 595 { 596 struct svc_fh resfh; 597 __be32 status; 598 dev_t rdev; 599 600 fh_init(&resfh, NFS4_FHSIZE); 601 602 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 603 NFSD_MAY_CREATE); 604 if (status) 605 return status; 606 607 status = check_attr_support(rqstp, cstate, create->cr_bmval, 608 nfsd_attrmask); 609 if (status) 610 return status; 611 612 switch (create->cr_type) { 613 case NF4LNK: 614 /* ugh! we have to null-terminate the linktext, or 615 * vfs_symlink() will choke. it is always safe to 616 * null-terminate by brute force, since at worst we 617 * will overwrite the first byte of the create namelen 618 * in the XDR buffer, which has already been extracted 619 * during XDR decode. 620 */ 621 create->cr_linkname[create->cr_linklen] = 0; 622 623 status = nfsd_symlink(rqstp, &cstate->current_fh, 624 create->cr_name, create->cr_namelen, 625 create->cr_linkname, create->cr_linklen, 626 &resfh, &create->cr_iattr); 627 break; 628 629 case NF4BLK: 630 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 631 if (MAJOR(rdev) != create->cr_specdata1 || 632 MINOR(rdev) != create->cr_specdata2) 633 return nfserr_inval; 634 status = nfsd_create(rqstp, &cstate->current_fh, 635 create->cr_name, create->cr_namelen, 636 &create->cr_iattr, S_IFBLK, rdev, &resfh); 637 break; 638 639 case NF4CHR: 640 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 641 if (MAJOR(rdev) != create->cr_specdata1 || 642 MINOR(rdev) != create->cr_specdata2) 643 return nfserr_inval; 644 status = nfsd_create(rqstp, &cstate->current_fh, 645 create->cr_name, create->cr_namelen, 646 &create->cr_iattr,S_IFCHR, rdev, &resfh); 647 break; 648 649 case NF4SOCK: 650 status = nfsd_create(rqstp, &cstate->current_fh, 651 create->cr_name, create->cr_namelen, 652 &create->cr_iattr, S_IFSOCK, 0, &resfh); 653 break; 654 655 case NF4FIFO: 656 status = nfsd_create(rqstp, &cstate->current_fh, 657 create->cr_name, create->cr_namelen, 658 &create->cr_iattr, S_IFIFO, 0, &resfh); 659 break; 660 661 case NF4DIR: 662 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 663 status = nfsd_create(rqstp, &cstate->current_fh, 664 create->cr_name, create->cr_namelen, 665 &create->cr_iattr, S_IFDIR, 0, &resfh); 666 break; 667 668 default: 669 status = nfserr_badtype; 670 } 671 672 if (status) 673 goto out; 674 675 if (create->cr_label.len) 676 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 677 678 if (create->cr_acl != NULL) 679 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 680 create->cr_bmval); 681 682 fh_unlock(&cstate->current_fh); 683 set_change_info(&create->cr_cinfo, &cstate->current_fh); 684 fh_dup2(&cstate->current_fh, &resfh); 685 out: 686 fh_put(&resfh); 687 return status; 688 } 689 690 static __be32 691 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 692 struct nfsd4_getattr *getattr) 693 { 694 __be32 status; 695 696 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 697 if (status) 698 return status; 699 700 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 701 return nfserr_inval; 702 703 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 704 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 705 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 706 707 getattr->ga_fhp = &cstate->current_fh; 708 return nfs_ok; 709 } 710 711 static __be32 712 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 713 struct nfsd4_link *link) 714 { 715 __be32 status = nfserr_nofilehandle; 716 717 if (!cstate->save_fh.fh_dentry) 718 return status; 719 status = nfsd_link(rqstp, &cstate->current_fh, 720 link->li_name, link->li_namelen, &cstate->save_fh); 721 if (!status) 722 set_change_info(&link->li_cinfo, &cstate->current_fh); 723 return status; 724 } 725 726 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 727 { 728 struct svc_fh tmp_fh; 729 __be32 ret; 730 731 fh_init(&tmp_fh, NFS4_FHSIZE); 732 ret = exp_pseudoroot(rqstp, &tmp_fh); 733 if (ret) 734 return ret; 735 if (tmp_fh.fh_dentry == fh->fh_dentry) { 736 fh_put(&tmp_fh); 737 return nfserr_noent; 738 } 739 fh_put(&tmp_fh); 740 return nfsd_lookup(rqstp, fh, "..", 2, fh); 741 } 742 743 static __be32 744 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 745 void *arg) 746 { 747 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 748 } 749 750 static __be32 751 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 752 struct nfsd4_lookup *lookup) 753 { 754 return nfsd_lookup(rqstp, &cstate->current_fh, 755 lookup->lo_name, lookup->lo_len, 756 &cstate->current_fh); 757 } 758 759 static __be32 760 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 761 struct nfsd4_read *read) 762 { 763 __be32 status; 764 765 /* no need to check permission - this will be done in nfsd_read() */ 766 767 read->rd_filp = NULL; 768 if (read->rd_offset >= OFFSET_MAX) 769 return nfserr_inval; 770 771 /* 772 * If we do a zero copy read, then a client will see read data 773 * that reflects the state of the file *after* performing the 774 * following compound. 775 * 776 * To ensure proper ordering, we therefore turn off zero copy if 777 * the client wants us to do more in this compound: 778 */ 779 if (!nfsd4_last_compound_op(rqstp)) 780 rqstp->rq_splice_ok = false; 781 782 nfs4_lock_state(); 783 /* check stateid */ 784 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 785 cstate, &read->rd_stateid, 786 RD_STATE, &read->rd_filp))) { 787 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 788 goto out; 789 } 790 if (read->rd_filp) 791 get_file(read->rd_filp); 792 status = nfs_ok; 793 out: 794 nfs4_unlock_state(); 795 read->rd_rqstp = rqstp; 796 read->rd_fhp = &cstate->current_fh; 797 return status; 798 } 799 800 static __be32 801 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 802 struct nfsd4_readdir *readdir) 803 { 804 u64 cookie = readdir->rd_cookie; 805 static const nfs4_verifier zeroverf; 806 807 /* no need to check permission - this will be done in nfsd_readdir() */ 808 809 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 810 return nfserr_inval; 811 812 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 813 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 814 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 815 816 if ((cookie == 1) || (cookie == 2) || 817 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 818 return nfserr_bad_cookie; 819 820 readdir->rd_rqstp = rqstp; 821 readdir->rd_fhp = &cstate->current_fh; 822 return nfs_ok; 823 } 824 825 static __be32 826 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 827 struct nfsd4_readlink *readlink) 828 { 829 readlink->rl_rqstp = rqstp; 830 readlink->rl_fhp = &cstate->current_fh; 831 return nfs_ok; 832 } 833 834 static __be32 835 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 836 struct nfsd4_remove *remove) 837 { 838 __be32 status; 839 840 if (locks_in_grace(SVC_NET(rqstp))) 841 return nfserr_grace; 842 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 843 remove->rm_name, remove->rm_namelen); 844 if (!status) { 845 fh_unlock(&cstate->current_fh); 846 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 847 } 848 return status; 849 } 850 851 static __be32 852 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 853 struct nfsd4_rename *rename) 854 { 855 __be32 status = nfserr_nofilehandle; 856 857 if (!cstate->save_fh.fh_dentry) 858 return status; 859 if (locks_in_grace(SVC_NET(rqstp)) && 860 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 861 return nfserr_grace; 862 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 863 rename->rn_snamelen, &cstate->current_fh, 864 rename->rn_tname, rename->rn_tnamelen); 865 if (status) 866 return status; 867 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 868 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 869 return nfs_ok; 870 } 871 872 static __be32 873 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 874 struct nfsd4_secinfo *secinfo) 875 { 876 struct svc_fh resfh; 877 struct svc_export *exp; 878 struct dentry *dentry; 879 __be32 err; 880 881 fh_init(&resfh, NFS4_FHSIZE); 882 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 883 if (err) 884 return err; 885 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 886 secinfo->si_name, secinfo->si_namelen, 887 &exp, &dentry); 888 if (err) 889 return err; 890 if (dentry->d_inode == NULL) { 891 exp_put(exp); 892 err = nfserr_noent; 893 } else 894 secinfo->si_exp = exp; 895 dput(dentry); 896 if (cstate->minorversion) 897 /* See rfc 5661 section 2.6.3.1.1.8 */ 898 fh_put(&cstate->current_fh); 899 return err; 900 } 901 902 static __be32 903 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 904 struct nfsd4_secinfo_no_name *sin) 905 { 906 __be32 err; 907 908 switch (sin->sin_style) { 909 case NFS4_SECINFO_STYLE4_CURRENT_FH: 910 break; 911 case NFS4_SECINFO_STYLE4_PARENT: 912 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 913 if (err) 914 return err; 915 break; 916 default: 917 return nfserr_inval; 918 } 919 exp_get(cstate->current_fh.fh_export); 920 sin->sin_exp = cstate->current_fh.fh_export; 921 fh_put(&cstate->current_fh); 922 return nfs_ok; 923 } 924 925 static __be32 926 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 927 struct nfsd4_setattr *setattr) 928 { 929 __be32 status = nfs_ok; 930 int err; 931 932 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 933 nfs4_lock_state(); 934 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 935 &setattr->sa_stateid, WR_STATE, NULL); 936 nfs4_unlock_state(); 937 if (status) { 938 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 939 return status; 940 } 941 } 942 err = fh_want_write(&cstate->current_fh); 943 if (err) 944 return nfserrno(err); 945 status = nfs_ok; 946 947 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 948 nfsd_attrmask); 949 if (status) 950 goto out; 951 952 if (setattr->sa_acl != NULL) 953 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 954 setattr->sa_acl); 955 if (status) 956 goto out; 957 if (setattr->sa_label.len) 958 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 959 &setattr->sa_label); 960 if (status) 961 goto out; 962 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 963 0, (time_t)0); 964 out: 965 fh_drop_write(&cstate->current_fh); 966 return status; 967 } 968 969 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 970 { 971 int i = 1; 972 int buflen = write->wr_buflen; 973 974 vec[0].iov_base = write->wr_head.iov_base; 975 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 976 buflen -= vec[0].iov_len; 977 978 while (buflen) { 979 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 980 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 981 buflen -= vec[i].iov_len; 982 i++; 983 } 984 return i; 985 } 986 987 static __be32 988 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 989 struct nfsd4_write *write) 990 { 991 stateid_t *stateid = &write->wr_stateid; 992 struct file *filp = NULL; 993 __be32 status = nfs_ok; 994 unsigned long cnt; 995 int nvecs; 996 997 /* no need to check permission - this will be done in nfsd_write() */ 998 999 if (write->wr_offset >= OFFSET_MAX) 1000 return nfserr_inval; 1001 1002 nfs4_lock_state(); 1003 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 1004 cstate, stateid, WR_STATE, &filp); 1005 if (status) { 1006 nfs4_unlock_state(); 1007 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 1008 return status; 1009 } 1010 if (filp) 1011 get_file(filp); 1012 nfs4_unlock_state(); 1013 1014 cnt = write->wr_buflen; 1015 write->wr_how_written = write->wr_stable_how; 1016 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 1017 1018 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1019 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1020 1021 status = nfsd_write(rqstp, &cstate->current_fh, filp, 1022 write->wr_offset, rqstp->rq_vec, nvecs, 1023 &cnt, &write->wr_how_written); 1024 if (filp) 1025 fput(filp); 1026 1027 write->wr_bytes_written = cnt; 1028 1029 return status; 1030 } 1031 1032 /* This routine never returns NFS_OK! If there are no other errors, it 1033 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1034 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1035 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1036 */ 1037 static __be32 1038 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1039 struct nfsd4_verify *verify) 1040 { 1041 __be32 *buf, *p; 1042 int count; 1043 __be32 status; 1044 1045 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1046 if (status) 1047 return status; 1048 1049 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1050 if (status) 1051 return status; 1052 1053 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1054 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1055 return nfserr_inval; 1056 if (verify->ve_attrlen & 3) 1057 return nfserr_inval; 1058 1059 /* count in words: 1060 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1061 */ 1062 count = 4 + (verify->ve_attrlen >> 2); 1063 buf = kmalloc(count << 2, GFP_KERNEL); 1064 if (!buf) 1065 return nfserr_jukebox; 1066 1067 p = buf; 1068 status = nfsd4_encode_fattr(&cstate->current_fh, 1069 cstate->current_fh.fh_export, 1070 cstate->current_fh.fh_dentry, &p, 1071 count, verify->ve_bmval, 1072 rqstp, 0); 1073 1074 /* this means that nfsd4_encode_fattr() ran out of space */ 1075 if (status == nfserr_resource) 1076 status = nfserr_not_same; 1077 if (status) 1078 goto out_kfree; 1079 1080 /* skip bitmap */ 1081 p = buf + 1 + ntohl(buf[0]); 1082 status = nfserr_not_same; 1083 if (ntohl(*p++) != verify->ve_attrlen) 1084 goto out_kfree; 1085 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1086 status = nfserr_same; 1087 1088 out_kfree: 1089 kfree(buf); 1090 return status; 1091 } 1092 1093 static __be32 1094 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1095 struct nfsd4_verify *verify) 1096 { 1097 __be32 status; 1098 1099 status = _nfsd4_verify(rqstp, cstate, verify); 1100 return status == nfserr_not_same ? nfs_ok : status; 1101 } 1102 1103 static __be32 1104 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1105 struct nfsd4_verify *verify) 1106 { 1107 __be32 status; 1108 1109 status = _nfsd4_verify(rqstp, cstate, verify); 1110 return status == nfserr_same ? nfs_ok : status; 1111 } 1112 1113 /* 1114 * NULL call. 1115 */ 1116 static __be32 1117 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1118 { 1119 return nfs_ok; 1120 } 1121 1122 static inline void nfsd4_increment_op_stats(u32 opnum) 1123 { 1124 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1125 nfsdstats.nfs4_opcount[opnum]++; 1126 } 1127 1128 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1129 void *); 1130 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1131 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1132 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1133 1134 enum nfsd4_op_flags { 1135 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1136 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1137 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1138 /* For rfc 5661 section 2.6.3.1.1: */ 1139 OP_HANDLES_WRONGSEC = 1 << 3, 1140 OP_IS_PUTFH_LIKE = 1 << 4, 1141 /* 1142 * These are the ops whose result size we estimate before 1143 * encoding, to avoid performing an op then not being able to 1144 * respond or cache a response. This includes writes and setattrs 1145 * as well as the operations usually called "nonidempotent": 1146 */ 1147 OP_MODIFIES_SOMETHING = 1 << 5, 1148 /* 1149 * Cache compounds containing these ops in the xid-based drc: 1150 * We use the DRC for compounds containing non-idempotent 1151 * operations, *except* those that are 4.1-specific (since 1152 * sessions provide their own EOS), and except for stateful 1153 * operations other than setclientid and setclientid_confirm 1154 * (since sequence numbers provide EOS for open, lock, etc in 1155 * the v4.0 case). 1156 */ 1157 OP_CACHEME = 1 << 6, 1158 /* 1159 * These are ops which clear current state id. 1160 */ 1161 OP_CLEAR_STATEID = 1 << 7, 1162 }; 1163 1164 struct nfsd4_operation { 1165 nfsd4op_func op_func; 1166 u32 op_flags; 1167 char *op_name; 1168 /* Try to get response size before operation */ 1169 nfsd4op_rsize op_rsize_bop; 1170 stateid_getter op_get_currentstateid; 1171 stateid_setter op_set_currentstateid; 1172 }; 1173 1174 static struct nfsd4_operation nfsd4_ops[]; 1175 1176 #ifdef NFSD_DEBUG 1177 static const char *nfsd4_op_name(unsigned opnum); 1178 #endif 1179 1180 /* 1181 * Enforce NFSv4.1 COMPOUND ordering rules: 1182 * 1183 * Also note, enforced elsewhere: 1184 * - SEQUENCE other than as first op results in 1185 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1186 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1187 * (Enforced in nfsd4_bind_conn_to_session().) 1188 * - DESTROY_SESSION must be the final operation in a compound, if 1189 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1190 * (Enforced in nfsd4_destroy_session().) 1191 */ 1192 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1193 { 1194 struct nfsd4_op *op = &args->ops[0]; 1195 1196 /* These ordering requirements don't apply to NFSv4.0: */ 1197 if (args->minorversion == 0) 1198 return nfs_ok; 1199 /* This is weird, but OK, not our problem: */ 1200 if (args->opcnt == 0) 1201 return nfs_ok; 1202 if (op->status == nfserr_op_illegal) 1203 return nfs_ok; 1204 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1205 return nfserr_op_not_in_session; 1206 if (op->opnum == OP_SEQUENCE) 1207 return nfs_ok; 1208 if (args->opcnt != 1) 1209 return nfserr_not_only_op; 1210 return nfs_ok; 1211 } 1212 1213 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1214 { 1215 return &nfsd4_ops[op->opnum]; 1216 } 1217 1218 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1219 { 1220 return OPDESC(op)->op_flags & OP_CACHEME; 1221 } 1222 1223 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1224 { 1225 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1226 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1227 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1228 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1229 struct nfsd4_operation *thisd; 1230 struct nfsd4_operation *nextd; 1231 1232 thisd = OPDESC(this); 1233 /* 1234 * Most ops check wronsec on our own; only the putfh-like ops 1235 * have special rules. 1236 */ 1237 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1238 return false; 1239 /* 1240 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1241 * put-filehandle operation if we're not going to use the 1242 * result: 1243 */ 1244 if (argp->opcnt == resp->opcnt) 1245 return false; 1246 1247 nextd = OPDESC(next); 1248 /* 1249 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1250 * errors themselves as necessary; others should check for them 1251 * now: 1252 */ 1253 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1254 } 1255 1256 /* 1257 * COMPOUND call. 1258 */ 1259 static __be32 1260 nfsd4_proc_compound(struct svc_rqst *rqstp, 1261 struct nfsd4_compoundargs *args, 1262 struct nfsd4_compoundres *resp) 1263 { 1264 struct nfsd4_op *op; 1265 struct nfsd4_operation *opdesc; 1266 struct nfsd4_compound_state *cstate = &resp->cstate; 1267 int slack_bytes; 1268 u32 plen = 0; 1269 __be32 status; 1270 1271 resp->xbuf = &rqstp->rq_res; 1272 resp->p = rqstp->rq_res.head[0].iov_base + 1273 rqstp->rq_res.head[0].iov_len; 1274 resp->tagp = resp->p; 1275 /* reserve space for: taglen, tag, and opcnt */ 1276 resp->p += 2 + XDR_QUADLEN(args->taglen); 1277 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; 1278 resp->taglen = args->taglen; 1279 resp->tag = args->tag; 1280 resp->opcnt = 0; 1281 resp->rqstp = rqstp; 1282 resp->cstate.minorversion = args->minorversion; 1283 resp->cstate.replay_owner = NULL; 1284 resp->cstate.session = NULL; 1285 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); 1286 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); 1287 /* 1288 * Don't use the deferral mechanism for NFSv4; compounds make it 1289 * too hard to avoid non-idempotency problems. 1290 */ 1291 rqstp->rq_usedeferral = 0; 1292 1293 /* 1294 * According to RFC3010, this takes precedence over all other errors. 1295 */ 1296 status = nfserr_minor_vers_mismatch; 1297 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1298 goto out; 1299 1300 status = nfs41_check_op_ordering(args); 1301 if (status) { 1302 op = &args->ops[0]; 1303 op->status = status; 1304 goto encode_op; 1305 } 1306 1307 while (!status && resp->opcnt < args->opcnt) { 1308 op = &args->ops[resp->opcnt++]; 1309 1310 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1311 resp->opcnt, args->opcnt, op->opnum, 1312 nfsd4_op_name(op->opnum)); 1313 /* 1314 * The XDR decode routines may have pre-set op->status; 1315 * for example, if there is a miscellaneous XDR error 1316 * it will be set to nfserr_bad_xdr. 1317 */ 1318 if (op->status) { 1319 if (op->opnum == OP_OPEN) 1320 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1321 goto encode_op; 1322 } 1323 1324 /* We must be able to encode a successful response to 1325 * this operation, with enough room left over to encode a 1326 * failed response to the next operation. If we don't 1327 * have enough room, fail with ERR_RESOURCE. 1328 */ 1329 slack_bytes = (char *)resp->end - (char *)resp->p; 1330 if (slack_bytes < COMPOUND_SLACK_SPACE 1331 + COMPOUND_ERR_SLACK_SPACE) { 1332 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); 1333 op->status = nfserr_resource; 1334 goto encode_op; 1335 } 1336 1337 opdesc = OPDESC(op); 1338 1339 if (!cstate->current_fh.fh_dentry) { 1340 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1341 op->status = nfserr_nofilehandle; 1342 goto encode_op; 1343 } 1344 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && 1345 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1346 op->status = nfserr_moved; 1347 goto encode_op; 1348 } 1349 1350 /* If op is non-idempotent */ 1351 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1352 plen = opdesc->op_rsize_bop(rqstp, op); 1353 op->status = nfsd4_check_resp_size(resp, plen); 1354 } 1355 1356 if (op->status) 1357 goto encode_op; 1358 1359 if (opdesc->op_get_currentstateid) 1360 opdesc->op_get_currentstateid(cstate, &op->u); 1361 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1362 1363 if (!op->status) { 1364 if (opdesc->op_set_currentstateid) 1365 opdesc->op_set_currentstateid(cstate, &op->u); 1366 1367 if (opdesc->op_flags & OP_CLEAR_STATEID) 1368 clear_current_stateid(cstate); 1369 1370 if (need_wrongsec_check(rqstp)) 1371 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp); 1372 } 1373 1374 encode_op: 1375 /* Only from SEQUENCE */ 1376 if (resp->cstate.status == nfserr_replay_cache) { 1377 dprintk("%s NFS4.1 replay from cache\n", __func__); 1378 status = op->status; 1379 goto out; 1380 } 1381 if (op->status == nfserr_replay_me) { 1382 op->replay = &cstate->replay_owner->so_replay; 1383 nfsd4_encode_replay(resp, op); 1384 status = op->status = op->replay->rp_status; 1385 } else { 1386 nfsd4_encode_operation(resp, op); 1387 status = op->status; 1388 } 1389 1390 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1391 args->ops, args->opcnt, resp->opcnt, op->opnum, 1392 be32_to_cpu(status)); 1393 1394 if (cstate->replay_owner) { 1395 nfs4_unlock_state(); 1396 cstate->replay_owner = NULL; 1397 } 1398 /* XXX Ugh, we need to get rid of this kind of special case: */ 1399 if (op->opnum == OP_READ && op->u.read.rd_filp) 1400 fput(op->u.read.rd_filp); 1401 1402 nfsd4_increment_op_stats(op->opnum); 1403 } 1404 1405 resp->cstate.status = status; 1406 fh_put(&resp->cstate.current_fh); 1407 fh_put(&resp->cstate.save_fh); 1408 BUG_ON(resp->cstate.replay_owner); 1409 out: 1410 /* Reset deferral mechanism for RPC deferrals */ 1411 rqstp->rq_usedeferral = 1; 1412 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1413 return status; 1414 } 1415 1416 #define op_encode_hdr_size (2) 1417 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1418 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1419 #define op_encode_change_info_maxsz (5) 1420 #define nfs4_fattr_bitmap_maxsz (4) 1421 1422 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1423 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1424 1425 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1426 1427 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1428 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1429 op_encode_ace_maxsz) 1430 1431 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1432 1433 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1434 { 1435 return (op_encode_hdr_size) * sizeof(__be32); 1436 } 1437 1438 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1439 { 1440 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1441 } 1442 1443 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1444 { 1445 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1446 } 1447 1448 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1449 { 1450 return (op_encode_hdr_size + op_encode_change_info_maxsz 1451 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1452 } 1453 1454 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1455 { 1456 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1457 * sizeof(__be32); 1458 } 1459 1460 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1461 { 1462 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1463 * sizeof(__be32); 1464 } 1465 1466 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1467 { 1468 return (op_encode_hdr_size + op_encode_stateid_maxsz 1469 + op_encode_change_info_maxsz + 1 1470 + nfs4_fattr_bitmap_maxsz 1471 + op_encode_delegation_maxsz) * sizeof(__be32); 1472 } 1473 1474 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1475 { 1476 u32 maxcount = 0, rlen = 0; 1477 1478 maxcount = svc_max_payload(rqstp); 1479 rlen = op->u.read.rd_length; 1480 1481 if (rlen > maxcount) 1482 rlen = maxcount; 1483 1484 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen; 1485 } 1486 1487 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1488 { 1489 u32 rlen = op->u.readdir.rd_maxcount; 1490 1491 if (rlen > PAGE_SIZE) 1492 rlen = PAGE_SIZE; 1493 1494 return (op_encode_hdr_size + op_encode_verifier_maxsz) 1495 * sizeof(__be32) + rlen; 1496 } 1497 1498 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1499 { 1500 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1501 * sizeof(__be32); 1502 } 1503 1504 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1505 { 1506 return (op_encode_hdr_size + op_encode_change_info_maxsz 1507 + op_encode_change_info_maxsz) * sizeof(__be32); 1508 } 1509 1510 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1511 { 1512 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1513 } 1514 1515 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1516 { 1517 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32); 1518 } 1519 1520 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1521 { 1522 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1523 } 1524 1525 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1526 { 1527 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1528 1 + 1 + 2 + /* eir_flags, spr_how, spo_must_enforce & _allow */\ 1529 2 + /*eir_server_owner.so_minor_id */\ 1530 /* eir_server_owner.so_major_id<> */\ 1531 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1532 /* eir_server_scope<> */\ 1533 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1534 1 + /* eir_server_impl_id array length */\ 1535 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1536 } 1537 1538 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1539 { 1540 return (op_encode_hdr_size + \ 1541 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1542 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1543 } 1544 1545 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1546 { 1547 return (op_encode_hdr_size + \ 1548 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1549 2 + /* csr_sequence, csr_flags */\ 1550 op_encode_channel_attrs_maxsz + \ 1551 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1552 } 1553 1554 static struct nfsd4_operation nfsd4_ops[] = { 1555 [OP_ACCESS] = { 1556 .op_func = (nfsd4op_func)nfsd4_access, 1557 .op_name = "OP_ACCESS", 1558 }, 1559 [OP_CLOSE] = { 1560 .op_func = (nfsd4op_func)nfsd4_close, 1561 .op_flags = OP_MODIFIES_SOMETHING, 1562 .op_name = "OP_CLOSE", 1563 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1564 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 1565 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 1566 }, 1567 [OP_COMMIT] = { 1568 .op_func = (nfsd4op_func)nfsd4_commit, 1569 .op_flags = OP_MODIFIES_SOMETHING, 1570 .op_name = "OP_COMMIT", 1571 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 1572 }, 1573 [OP_CREATE] = { 1574 .op_func = (nfsd4op_func)nfsd4_create, 1575 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 1576 .op_name = "OP_CREATE", 1577 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 1578 }, 1579 [OP_DELEGRETURN] = { 1580 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1581 .op_flags = OP_MODIFIES_SOMETHING, 1582 .op_name = "OP_DELEGRETURN", 1583 .op_rsize_bop = nfsd4_only_status_rsize, 1584 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 1585 }, 1586 [OP_GETATTR] = { 1587 .op_func = (nfsd4op_func)nfsd4_getattr, 1588 .op_flags = ALLOWED_ON_ABSENT_FS, 1589 .op_name = "OP_GETATTR", 1590 }, 1591 [OP_GETFH] = { 1592 .op_func = (nfsd4op_func)nfsd4_getfh, 1593 .op_name = "OP_GETFH", 1594 }, 1595 [OP_LINK] = { 1596 .op_func = (nfsd4op_func)nfsd4_link, 1597 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 1598 | OP_CACHEME, 1599 .op_name = "OP_LINK", 1600 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 1601 }, 1602 [OP_LOCK] = { 1603 .op_func = (nfsd4op_func)nfsd4_lock, 1604 .op_flags = OP_MODIFIES_SOMETHING, 1605 .op_name = "OP_LOCK", 1606 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 1607 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 1608 }, 1609 [OP_LOCKT] = { 1610 .op_func = (nfsd4op_func)nfsd4_lockt, 1611 .op_name = "OP_LOCKT", 1612 }, 1613 [OP_LOCKU] = { 1614 .op_func = (nfsd4op_func)nfsd4_locku, 1615 .op_flags = OP_MODIFIES_SOMETHING, 1616 .op_name = "OP_LOCKU", 1617 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1618 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 1619 }, 1620 [OP_LOOKUP] = { 1621 .op_func = (nfsd4op_func)nfsd4_lookup, 1622 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1623 .op_name = "OP_LOOKUP", 1624 }, 1625 [OP_LOOKUPP] = { 1626 .op_func = (nfsd4op_func)nfsd4_lookupp, 1627 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1628 .op_name = "OP_LOOKUPP", 1629 }, 1630 [OP_NVERIFY] = { 1631 .op_func = (nfsd4op_func)nfsd4_nverify, 1632 .op_name = "OP_NVERIFY", 1633 }, 1634 [OP_OPEN] = { 1635 .op_func = (nfsd4op_func)nfsd4_open, 1636 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1637 .op_name = "OP_OPEN", 1638 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 1639 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 1640 }, 1641 [OP_OPEN_CONFIRM] = { 1642 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1643 .op_flags = OP_MODIFIES_SOMETHING, 1644 .op_name = "OP_OPEN_CONFIRM", 1645 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1646 }, 1647 [OP_OPEN_DOWNGRADE] = { 1648 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1649 .op_flags = OP_MODIFIES_SOMETHING, 1650 .op_name = "OP_OPEN_DOWNGRADE", 1651 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1652 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 1653 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 1654 }, 1655 [OP_PUTFH] = { 1656 .op_func = (nfsd4op_func)nfsd4_putfh, 1657 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1658 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1659 | OP_CLEAR_STATEID, 1660 .op_name = "OP_PUTFH", 1661 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1662 }, 1663 [OP_PUTPUBFH] = { 1664 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1665 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1666 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1667 | OP_CLEAR_STATEID, 1668 .op_name = "OP_PUTPUBFH", 1669 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1670 }, 1671 [OP_PUTROOTFH] = { 1672 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1673 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1674 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1675 | OP_CLEAR_STATEID, 1676 .op_name = "OP_PUTROOTFH", 1677 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1678 }, 1679 [OP_READ] = { 1680 .op_func = (nfsd4op_func)nfsd4_read, 1681 .op_flags = OP_MODIFIES_SOMETHING, 1682 .op_name = "OP_READ", 1683 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 1684 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 1685 }, 1686 [OP_READDIR] = { 1687 .op_func = (nfsd4op_func)nfsd4_readdir, 1688 .op_flags = OP_MODIFIES_SOMETHING, 1689 .op_name = "OP_READDIR", 1690 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 1691 }, 1692 [OP_READLINK] = { 1693 .op_func = (nfsd4op_func)nfsd4_readlink, 1694 .op_name = "OP_READLINK", 1695 }, 1696 [OP_REMOVE] = { 1697 .op_func = (nfsd4op_func)nfsd4_remove, 1698 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1699 .op_name = "OP_REMOVE", 1700 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 1701 }, 1702 [OP_RENAME] = { 1703 .op_func = (nfsd4op_func)nfsd4_rename, 1704 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1705 .op_name = "OP_RENAME", 1706 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 1707 }, 1708 [OP_RENEW] = { 1709 .op_func = (nfsd4op_func)nfsd4_renew, 1710 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1711 | OP_MODIFIES_SOMETHING, 1712 .op_name = "OP_RENEW", 1713 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1714 1715 }, 1716 [OP_RESTOREFH] = { 1717 .op_func = (nfsd4op_func)nfsd4_restorefh, 1718 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1719 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 1720 .op_name = "OP_RESTOREFH", 1721 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1722 }, 1723 [OP_SAVEFH] = { 1724 .op_func = (nfsd4op_func)nfsd4_savefh, 1725 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1726 .op_name = "OP_SAVEFH", 1727 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1728 }, 1729 [OP_SECINFO] = { 1730 .op_func = (nfsd4op_func)nfsd4_secinfo, 1731 .op_flags = OP_HANDLES_WRONGSEC, 1732 .op_name = "OP_SECINFO", 1733 }, 1734 [OP_SETATTR] = { 1735 .op_func = (nfsd4op_func)nfsd4_setattr, 1736 .op_name = "OP_SETATTR", 1737 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1738 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 1739 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 1740 }, 1741 [OP_SETCLIENTID] = { 1742 .op_func = (nfsd4op_func)nfsd4_setclientid, 1743 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1744 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1745 .op_name = "OP_SETCLIENTID", 1746 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 1747 }, 1748 [OP_SETCLIENTID_CONFIRM] = { 1749 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1750 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1751 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1752 .op_name = "OP_SETCLIENTID_CONFIRM", 1753 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1754 }, 1755 [OP_VERIFY] = { 1756 .op_func = (nfsd4op_func)nfsd4_verify, 1757 .op_name = "OP_VERIFY", 1758 }, 1759 [OP_WRITE] = { 1760 .op_func = (nfsd4op_func)nfsd4_write, 1761 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1762 .op_name = "OP_WRITE", 1763 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 1764 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 1765 }, 1766 [OP_RELEASE_LOCKOWNER] = { 1767 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1768 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1769 | OP_MODIFIES_SOMETHING, 1770 .op_name = "OP_RELEASE_LOCKOWNER", 1771 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1772 }, 1773 1774 /* NFSv4.1 operations */ 1775 [OP_EXCHANGE_ID] = { 1776 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1777 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1778 | OP_MODIFIES_SOMETHING, 1779 .op_name = "OP_EXCHANGE_ID", 1780 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 1781 }, 1782 [OP_BACKCHANNEL_CTL] = { 1783 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 1784 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1785 .op_name = "OP_BACKCHANNEL_CTL", 1786 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1787 }, 1788 [OP_BIND_CONN_TO_SESSION] = { 1789 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 1790 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1791 | OP_MODIFIES_SOMETHING, 1792 .op_name = "OP_BIND_CONN_TO_SESSION", 1793 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 1794 }, 1795 [OP_CREATE_SESSION] = { 1796 .op_func = (nfsd4op_func)nfsd4_create_session, 1797 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1798 | OP_MODIFIES_SOMETHING, 1799 .op_name = "OP_CREATE_SESSION", 1800 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 1801 }, 1802 [OP_DESTROY_SESSION] = { 1803 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1804 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1805 | OP_MODIFIES_SOMETHING, 1806 .op_name = "OP_DESTROY_SESSION", 1807 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1808 }, 1809 [OP_SEQUENCE] = { 1810 .op_func = (nfsd4op_func)nfsd4_sequence, 1811 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1812 .op_name = "OP_SEQUENCE", 1813 }, 1814 [OP_DESTROY_CLIENTID] = { 1815 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 1816 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1817 | OP_MODIFIES_SOMETHING, 1818 .op_name = "OP_DESTROY_CLIENTID", 1819 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1820 }, 1821 [OP_RECLAIM_COMPLETE] = { 1822 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 1823 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1824 .op_name = "OP_RECLAIM_COMPLETE", 1825 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1826 }, 1827 [OP_SECINFO_NO_NAME] = { 1828 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 1829 .op_flags = OP_HANDLES_WRONGSEC, 1830 .op_name = "OP_SECINFO_NO_NAME", 1831 }, 1832 [OP_TEST_STATEID] = { 1833 .op_func = (nfsd4op_func)nfsd4_test_stateid, 1834 .op_flags = ALLOWED_WITHOUT_FH, 1835 .op_name = "OP_TEST_STATEID", 1836 }, 1837 [OP_FREE_STATEID] = { 1838 .op_func = (nfsd4op_func)nfsd4_free_stateid, 1839 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1840 .op_name = "OP_FREE_STATEID", 1841 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 1842 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1843 }, 1844 }; 1845 1846 #ifdef NFSD_DEBUG 1847 static const char *nfsd4_op_name(unsigned opnum) 1848 { 1849 if (opnum < ARRAY_SIZE(nfsd4_ops)) 1850 return nfsd4_ops[opnum].op_name; 1851 return "unknown_operation"; 1852 } 1853 #endif 1854 1855 #define nfsd4_voidres nfsd4_voidargs 1856 struct nfsd4_voidargs { int dummy; }; 1857 1858 static struct svc_procedure nfsd_procedures4[2] = { 1859 [NFSPROC4_NULL] = { 1860 .pc_func = (svc_procfunc) nfsd4_proc_null, 1861 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 1862 .pc_argsize = sizeof(struct nfsd4_voidargs), 1863 .pc_ressize = sizeof(struct nfsd4_voidres), 1864 .pc_cachetype = RC_NOCACHE, 1865 .pc_xdrressize = 1, 1866 }, 1867 [NFSPROC4_COMPOUND] = { 1868 .pc_func = (svc_procfunc) nfsd4_proc_compound, 1869 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 1870 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 1871 .pc_argsize = sizeof(struct nfsd4_compoundargs), 1872 .pc_ressize = sizeof(struct nfsd4_compoundres), 1873 .pc_release = nfsd4_release_compoundargs, 1874 .pc_cachetype = RC_NOCACHE, 1875 .pc_xdrressize = NFSD_BUFSIZE/4, 1876 }, 1877 }; 1878 1879 struct svc_version nfsd_version4 = { 1880 .vs_vers = 4, 1881 .vs_nproc = 2, 1882 .vs_proc = nfsd_procedures4, 1883 .vs_dispatch = nfsd_dispatch, 1884 .vs_xdrsize = NFS4_SVC_XDRSIZE, 1885 }; 1886 1887 /* 1888 * Local variables: 1889 * c-basic-offset: 8 1890 * End: 1891 */ 1892