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, struct svc_fh **resfh) 235 { 236 struct svc_fh *current_fh = &cstate->current_fh; 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 /* 285 * Note this may exit with the parent still locked. 286 * We will hold the lock until nfsd4_open's final 287 * lookup, to prevent renames or unlinks until we've had 288 * a chance to an acquire a delegation if appropriate. 289 */ 290 status = nfsd_lookup(rqstp, current_fh, 291 open->op_fname.data, open->op_fname.len, *resfh); 292 if (status) 293 goto out; 294 status = nfsd_check_obj_isreg(*resfh); 295 if (status) 296 goto out; 297 298 if (is_create_with_attrs(open) && open->op_acl != NULL) 299 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); 300 301 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); 302 accmode = NFSD_MAY_NOP; 303 if (open->op_created || 304 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 305 accmode |= NFSD_MAY_OWNER_OVERRIDE; 306 status = do_open_permission(rqstp, *resfh, open, accmode); 307 set_change_info(&open->op_cinfo, current_fh); 308 out: 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 svc_fh *resfh = NULL; 362 struct nfsd4_compoundres *resp; 363 struct net *net = SVC_NET(rqstp); 364 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 365 366 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 367 (int)open->op_fname.len, open->op_fname.data, 368 open->op_openowner); 369 370 /* This check required by spec. */ 371 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 372 return nfserr_inval; 373 374 open->op_created = 0; 375 /* 376 * RFC5661 18.51.3 377 * Before RECLAIM_COMPLETE done, server should deny new lock 378 */ 379 if (nfsd4_has_session(cstate) && 380 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 381 &cstate->session->se_client->cl_flags) && 382 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 383 return nfserr_grace; 384 385 if (nfsd4_has_session(cstate)) 386 copy_clientid(&open->op_clientid, cstate->session); 387 388 nfs4_lock_state(); 389 390 /* check seqid for replay. set nfs4_owner */ 391 resp = rqstp->rq_resp; 392 status = nfsd4_process_open1(&resp->cstate, open, nn); 393 if (status == nfserr_replay_me) { 394 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 395 fh_put(&cstate->current_fh); 396 fh_copy_shallow(&cstate->current_fh.fh_handle, 397 &rp->rp_openfh); 398 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 399 if (status) 400 dprintk("nfsd4_open: replay failed" 401 " restoring previous filehandle\n"); 402 else 403 status = nfserr_replay_me; 404 } 405 if (status) 406 goto out; 407 if (open->op_xdr_error) { 408 status = open->op_xdr_error; 409 goto out; 410 } 411 412 status = nfsd4_check_open_attributes(rqstp, cstate, open); 413 if (status) 414 goto out; 415 416 /* Openowner is now set, so sequence id will get bumped. Now we need 417 * these checks before we do any creates: */ 418 status = nfserr_grace; 419 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 420 goto out; 421 status = nfserr_no_grace; 422 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 423 goto out; 424 425 switch (open->op_claim_type) { 426 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 427 case NFS4_OPEN_CLAIM_NULL: 428 status = do_open_lookup(rqstp, cstate, open, &resfh); 429 if (status) 430 goto out; 431 break; 432 case NFS4_OPEN_CLAIM_PREVIOUS: 433 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 434 status = nfs4_check_open_reclaim(&open->op_clientid, 435 cstate->minorversion, 436 nn); 437 if (status) 438 goto out; 439 case NFS4_OPEN_CLAIM_FH: 440 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 441 status = do_open_fhandle(rqstp, cstate, open); 442 if (status) 443 goto out; 444 resfh = &cstate->current_fh; 445 break; 446 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 447 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 448 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 449 dprintk("NFSD: unsupported OPEN claim type %d\n", 450 open->op_claim_type); 451 status = nfserr_notsupp; 452 goto out; 453 default: 454 dprintk("NFSD: Invalid OPEN claim type %d\n", 455 open->op_claim_type); 456 status = nfserr_inval; 457 goto out; 458 } 459 /* 460 * nfsd4_process_open2() does the actual opening of the file. If 461 * successful, it (1) truncates the file if open->op_truncate was 462 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 463 */ 464 status = nfsd4_process_open2(rqstp, resfh, open); 465 WARN_ON(status && open->op_created); 466 out: 467 if (resfh && resfh != &cstate->current_fh) { 468 fh_dup2(&cstate->current_fh, resfh); 469 fh_put(resfh); 470 kfree(resfh); 471 } 472 nfsd4_cleanup_open_state(open, status); 473 if (open->op_openowner && !nfsd4_has_session(cstate)) 474 cstate->replay_owner = &open->op_openowner->oo_owner; 475 nfsd4_bump_seqid(cstate, status); 476 if (!cstate->replay_owner) 477 nfs4_unlock_state(); 478 return status; 479 } 480 481 /* 482 * OPEN is the only seqid-mutating operation whose decoding can fail 483 * with a seqid-mutating error (specifically, decoding of user names in 484 * the attributes). Therefore we have to do some processing to look up 485 * the stateowner so that we can bump the seqid. 486 */ 487 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 488 { 489 struct nfsd4_open *open = (struct nfsd4_open *)&op->u; 490 491 if (!seqid_mutating_err(ntohl(op->status))) 492 return op->status; 493 if (nfsd4_has_session(cstate)) 494 return op->status; 495 open->op_xdr_error = op->status; 496 return nfsd4_open(rqstp, cstate, open); 497 } 498 499 /* 500 * filehandle-manipulating ops. 501 */ 502 static __be32 503 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 504 struct svc_fh **getfh) 505 { 506 if (!cstate->current_fh.fh_dentry) 507 return nfserr_nofilehandle; 508 509 *getfh = &cstate->current_fh; 510 return nfs_ok; 511 } 512 513 static __be32 514 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 515 struct nfsd4_putfh *putfh) 516 { 517 fh_put(&cstate->current_fh); 518 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 519 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 520 putfh->pf_fhlen); 521 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 522 } 523 524 static __be32 525 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 526 void *arg) 527 { 528 __be32 status; 529 530 fh_put(&cstate->current_fh); 531 status = exp_pseudoroot(rqstp, &cstate->current_fh); 532 return status; 533 } 534 535 static __be32 536 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 537 void *arg) 538 { 539 if (!cstate->save_fh.fh_dentry) 540 return nfserr_restorefh; 541 542 fh_dup2(&cstate->current_fh, &cstate->save_fh); 543 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 544 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 545 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 546 } 547 return nfs_ok; 548 } 549 550 static __be32 551 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 552 void *arg) 553 { 554 if (!cstate->current_fh.fh_dentry) 555 return nfserr_nofilehandle; 556 557 fh_dup2(&cstate->save_fh, &cstate->current_fh); 558 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 559 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 560 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 561 } 562 return nfs_ok; 563 } 564 565 /* 566 * misc nfsv4 ops 567 */ 568 static __be32 569 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 570 struct nfsd4_access *access) 571 { 572 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 573 return nfserr_inval; 574 575 access->ac_resp_access = access->ac_req_access; 576 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 577 &access->ac_supported); 578 } 579 580 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 581 { 582 __be32 verf[2]; 583 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 584 585 verf[0] = (__be32)nn->nfssvc_boot.tv_sec; 586 verf[1] = (__be32)nn->nfssvc_boot.tv_usec; 587 memcpy(verifier->data, verf, sizeof(verifier->data)); 588 } 589 590 static __be32 591 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 592 struct nfsd4_commit *commit) 593 { 594 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 595 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 596 commit->co_count); 597 } 598 599 static __be32 600 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 601 struct nfsd4_create *create) 602 { 603 struct svc_fh resfh; 604 __be32 status; 605 dev_t rdev; 606 607 fh_init(&resfh, NFS4_FHSIZE); 608 609 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 610 NFSD_MAY_CREATE); 611 if (status) 612 return status; 613 614 status = check_attr_support(rqstp, cstate, create->cr_bmval, 615 nfsd_attrmask); 616 if (status) 617 return status; 618 619 switch (create->cr_type) { 620 case NF4LNK: 621 /* ugh! we have to null-terminate the linktext, or 622 * vfs_symlink() will choke. it is always safe to 623 * null-terminate by brute force, since at worst we 624 * will overwrite the first byte of the create namelen 625 * in the XDR buffer, which has already been extracted 626 * during XDR decode. 627 */ 628 create->cr_linkname[create->cr_linklen] = 0; 629 630 status = nfsd_symlink(rqstp, &cstate->current_fh, 631 create->cr_name, create->cr_namelen, 632 create->cr_linkname, create->cr_linklen, 633 &resfh, &create->cr_iattr); 634 break; 635 636 case NF4BLK: 637 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 638 if (MAJOR(rdev) != create->cr_specdata1 || 639 MINOR(rdev) != create->cr_specdata2) 640 return nfserr_inval; 641 status = nfsd_create(rqstp, &cstate->current_fh, 642 create->cr_name, create->cr_namelen, 643 &create->cr_iattr, S_IFBLK, rdev, &resfh); 644 break; 645 646 case NF4CHR: 647 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 648 if (MAJOR(rdev) != create->cr_specdata1 || 649 MINOR(rdev) != create->cr_specdata2) 650 return nfserr_inval; 651 status = nfsd_create(rqstp, &cstate->current_fh, 652 create->cr_name, create->cr_namelen, 653 &create->cr_iattr,S_IFCHR, rdev, &resfh); 654 break; 655 656 case NF4SOCK: 657 status = nfsd_create(rqstp, &cstate->current_fh, 658 create->cr_name, create->cr_namelen, 659 &create->cr_iattr, S_IFSOCK, 0, &resfh); 660 break; 661 662 case NF4FIFO: 663 status = nfsd_create(rqstp, &cstate->current_fh, 664 create->cr_name, create->cr_namelen, 665 &create->cr_iattr, S_IFIFO, 0, &resfh); 666 break; 667 668 case NF4DIR: 669 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 670 status = nfsd_create(rqstp, &cstate->current_fh, 671 create->cr_name, create->cr_namelen, 672 &create->cr_iattr, S_IFDIR, 0, &resfh); 673 break; 674 675 default: 676 status = nfserr_badtype; 677 } 678 679 if (status) 680 goto out; 681 682 if (create->cr_label.len) 683 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 684 685 if (create->cr_acl != NULL) 686 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 687 create->cr_bmval); 688 689 fh_unlock(&cstate->current_fh); 690 set_change_info(&create->cr_cinfo, &cstate->current_fh); 691 fh_dup2(&cstate->current_fh, &resfh); 692 out: 693 fh_put(&resfh); 694 return status; 695 } 696 697 static __be32 698 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 699 struct nfsd4_getattr *getattr) 700 { 701 __be32 status; 702 703 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 704 if (status) 705 return status; 706 707 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 708 return nfserr_inval; 709 710 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 711 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 712 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 713 714 getattr->ga_fhp = &cstate->current_fh; 715 return nfs_ok; 716 } 717 718 static __be32 719 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 720 struct nfsd4_link *link) 721 { 722 __be32 status = nfserr_nofilehandle; 723 724 if (!cstate->save_fh.fh_dentry) 725 return status; 726 status = nfsd_link(rqstp, &cstate->current_fh, 727 link->li_name, link->li_namelen, &cstate->save_fh); 728 if (!status) 729 set_change_info(&link->li_cinfo, &cstate->current_fh); 730 return status; 731 } 732 733 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 734 { 735 struct svc_fh tmp_fh; 736 __be32 ret; 737 738 fh_init(&tmp_fh, NFS4_FHSIZE); 739 ret = exp_pseudoroot(rqstp, &tmp_fh); 740 if (ret) 741 return ret; 742 if (tmp_fh.fh_dentry == fh->fh_dentry) { 743 fh_put(&tmp_fh); 744 return nfserr_noent; 745 } 746 fh_put(&tmp_fh); 747 return nfsd_lookup(rqstp, fh, "..", 2, fh); 748 } 749 750 static __be32 751 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 752 void *arg) 753 { 754 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 755 } 756 757 static __be32 758 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 759 struct nfsd4_lookup *lookup) 760 { 761 return nfsd_lookup(rqstp, &cstate->current_fh, 762 lookup->lo_name, lookup->lo_len, 763 &cstate->current_fh); 764 } 765 766 static __be32 767 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 768 struct nfsd4_read *read) 769 { 770 __be32 status; 771 772 /* no need to check permission - this will be done in nfsd_read() */ 773 774 read->rd_filp = NULL; 775 if (read->rd_offset >= OFFSET_MAX) 776 return nfserr_inval; 777 778 /* 779 * If we do a zero copy read, then a client will see read data 780 * that reflects the state of the file *after* performing the 781 * following compound. 782 * 783 * To ensure proper ordering, we therefore turn off zero copy if 784 * the client wants us to do more in this compound: 785 */ 786 if (!nfsd4_last_compound_op(rqstp)) 787 rqstp->rq_splice_ok = false; 788 789 nfs4_lock_state(); 790 /* check stateid */ 791 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 792 cstate, &read->rd_stateid, 793 RD_STATE, &read->rd_filp))) { 794 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 795 goto out; 796 } 797 if (read->rd_filp) 798 get_file(read->rd_filp); 799 status = nfs_ok; 800 out: 801 nfs4_unlock_state(); 802 read->rd_rqstp = rqstp; 803 read->rd_fhp = &cstate->current_fh; 804 return status; 805 } 806 807 static __be32 808 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 809 struct nfsd4_readdir *readdir) 810 { 811 u64 cookie = readdir->rd_cookie; 812 static const nfs4_verifier zeroverf; 813 814 /* no need to check permission - this will be done in nfsd_readdir() */ 815 816 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 817 return nfserr_inval; 818 819 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 820 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 821 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 822 823 if ((cookie == 1) || (cookie == 2) || 824 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 825 return nfserr_bad_cookie; 826 827 readdir->rd_rqstp = rqstp; 828 readdir->rd_fhp = &cstate->current_fh; 829 return nfs_ok; 830 } 831 832 static __be32 833 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 834 struct nfsd4_readlink *readlink) 835 { 836 readlink->rl_rqstp = rqstp; 837 readlink->rl_fhp = &cstate->current_fh; 838 return nfs_ok; 839 } 840 841 static __be32 842 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 843 struct nfsd4_remove *remove) 844 { 845 __be32 status; 846 847 if (locks_in_grace(SVC_NET(rqstp))) 848 return nfserr_grace; 849 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 850 remove->rm_name, remove->rm_namelen); 851 if (!status) { 852 fh_unlock(&cstate->current_fh); 853 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 854 } 855 return status; 856 } 857 858 static __be32 859 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 860 struct nfsd4_rename *rename) 861 { 862 __be32 status = nfserr_nofilehandle; 863 864 if (!cstate->save_fh.fh_dentry) 865 return status; 866 if (locks_in_grace(SVC_NET(rqstp)) && 867 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 868 return nfserr_grace; 869 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 870 rename->rn_snamelen, &cstate->current_fh, 871 rename->rn_tname, rename->rn_tnamelen); 872 if (status) 873 return status; 874 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 875 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 876 return nfs_ok; 877 } 878 879 static __be32 880 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 881 struct nfsd4_secinfo *secinfo) 882 { 883 struct svc_fh resfh; 884 struct svc_export *exp; 885 struct dentry *dentry; 886 __be32 err; 887 888 fh_init(&resfh, NFS4_FHSIZE); 889 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 890 if (err) 891 return err; 892 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 893 secinfo->si_name, secinfo->si_namelen, 894 &exp, &dentry); 895 if (err) 896 return err; 897 if (dentry->d_inode == NULL) { 898 exp_put(exp); 899 err = nfserr_noent; 900 } else 901 secinfo->si_exp = exp; 902 dput(dentry); 903 if (cstate->minorversion) 904 /* See rfc 5661 section 2.6.3.1.1.8 */ 905 fh_put(&cstate->current_fh); 906 return err; 907 } 908 909 static __be32 910 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 911 struct nfsd4_secinfo_no_name *sin) 912 { 913 __be32 err; 914 915 switch (sin->sin_style) { 916 case NFS4_SECINFO_STYLE4_CURRENT_FH: 917 break; 918 case NFS4_SECINFO_STYLE4_PARENT: 919 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 920 if (err) 921 return err; 922 break; 923 default: 924 return nfserr_inval; 925 } 926 exp_get(cstate->current_fh.fh_export); 927 sin->sin_exp = cstate->current_fh.fh_export; 928 fh_put(&cstate->current_fh); 929 return nfs_ok; 930 } 931 932 static __be32 933 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 934 struct nfsd4_setattr *setattr) 935 { 936 __be32 status = nfs_ok; 937 int err; 938 939 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 940 nfs4_lock_state(); 941 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 942 &setattr->sa_stateid, WR_STATE, NULL); 943 nfs4_unlock_state(); 944 if (status) { 945 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 946 return status; 947 } 948 } 949 err = fh_want_write(&cstate->current_fh); 950 if (err) 951 return nfserrno(err); 952 status = nfs_ok; 953 954 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 955 nfsd_attrmask); 956 if (status) 957 goto out; 958 959 if (setattr->sa_acl != NULL) 960 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 961 setattr->sa_acl); 962 if (status) 963 goto out; 964 if (setattr->sa_label.len) 965 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 966 &setattr->sa_label); 967 if (status) 968 goto out; 969 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 970 0, (time_t)0); 971 out: 972 fh_drop_write(&cstate->current_fh); 973 return status; 974 } 975 976 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 977 { 978 int i = 1; 979 int buflen = write->wr_buflen; 980 981 vec[0].iov_base = write->wr_head.iov_base; 982 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 983 buflen -= vec[0].iov_len; 984 985 while (buflen) { 986 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 987 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 988 buflen -= vec[i].iov_len; 989 i++; 990 } 991 return i; 992 } 993 994 static __be32 995 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 996 struct nfsd4_write *write) 997 { 998 stateid_t *stateid = &write->wr_stateid; 999 struct file *filp = NULL; 1000 __be32 status = nfs_ok; 1001 unsigned long cnt; 1002 int nvecs; 1003 1004 /* no need to check permission - this will be done in nfsd_write() */ 1005 1006 if (write->wr_offset >= OFFSET_MAX) 1007 return nfserr_inval; 1008 1009 nfs4_lock_state(); 1010 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 1011 cstate, stateid, WR_STATE, &filp); 1012 if (status) { 1013 nfs4_unlock_state(); 1014 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 1015 return status; 1016 } 1017 if (filp) 1018 get_file(filp); 1019 nfs4_unlock_state(); 1020 1021 cnt = write->wr_buflen; 1022 write->wr_how_written = write->wr_stable_how; 1023 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 1024 1025 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1026 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1027 1028 status = nfsd_write(rqstp, &cstate->current_fh, filp, 1029 write->wr_offset, rqstp->rq_vec, nvecs, 1030 &cnt, &write->wr_how_written); 1031 if (filp) 1032 fput(filp); 1033 1034 write->wr_bytes_written = cnt; 1035 1036 return status; 1037 } 1038 1039 /* This routine never returns NFS_OK! If there are no other errors, it 1040 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1041 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1042 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1043 */ 1044 static __be32 1045 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1046 struct nfsd4_verify *verify) 1047 { 1048 __be32 *buf, *p; 1049 int count; 1050 __be32 status; 1051 1052 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1053 if (status) 1054 return status; 1055 1056 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1057 if (status) 1058 return status; 1059 1060 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1061 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1062 return nfserr_inval; 1063 if (verify->ve_attrlen & 3) 1064 return nfserr_inval; 1065 1066 /* count in words: 1067 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1068 */ 1069 count = 4 + (verify->ve_attrlen >> 2); 1070 buf = kmalloc(count << 2, GFP_KERNEL); 1071 if (!buf) 1072 return nfserr_jukebox; 1073 1074 p = buf; 1075 status = nfsd4_encode_fattr(&cstate->current_fh, 1076 cstate->current_fh.fh_export, 1077 cstate->current_fh.fh_dentry, &p, 1078 count, verify->ve_bmval, 1079 rqstp, 0); 1080 /* 1081 * If nfsd4_encode_fattr() ran out of space, assume that's because 1082 * the attributes are longer (hence different) than those given: 1083 */ 1084 if (status == nfserr_resource) 1085 status = nfserr_not_same; 1086 if (status) 1087 goto out_kfree; 1088 1089 /* skip bitmap */ 1090 p = buf + 1 + ntohl(buf[0]); 1091 status = nfserr_not_same; 1092 if (ntohl(*p++) != verify->ve_attrlen) 1093 goto out_kfree; 1094 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1095 status = nfserr_same; 1096 1097 out_kfree: 1098 kfree(buf); 1099 return status; 1100 } 1101 1102 static __be32 1103 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1104 struct nfsd4_verify *verify) 1105 { 1106 __be32 status; 1107 1108 status = _nfsd4_verify(rqstp, cstate, verify); 1109 return status == nfserr_not_same ? nfs_ok : status; 1110 } 1111 1112 static __be32 1113 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1114 struct nfsd4_verify *verify) 1115 { 1116 __be32 status; 1117 1118 status = _nfsd4_verify(rqstp, cstate, verify); 1119 return status == nfserr_same ? nfs_ok : status; 1120 } 1121 1122 /* 1123 * NULL call. 1124 */ 1125 static __be32 1126 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1127 { 1128 return nfs_ok; 1129 } 1130 1131 static inline void nfsd4_increment_op_stats(u32 opnum) 1132 { 1133 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1134 nfsdstats.nfs4_opcount[opnum]++; 1135 } 1136 1137 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1138 void *); 1139 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1140 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1141 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1142 1143 enum nfsd4_op_flags { 1144 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1145 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1146 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1147 /* For rfc 5661 section 2.6.3.1.1: */ 1148 OP_HANDLES_WRONGSEC = 1 << 3, 1149 OP_IS_PUTFH_LIKE = 1 << 4, 1150 /* 1151 * These are the ops whose result size we estimate before 1152 * encoding, to avoid performing an op then not being able to 1153 * respond or cache a response. This includes writes and setattrs 1154 * as well as the operations usually called "nonidempotent": 1155 */ 1156 OP_MODIFIES_SOMETHING = 1 << 5, 1157 /* 1158 * Cache compounds containing these ops in the xid-based drc: 1159 * We use the DRC for compounds containing non-idempotent 1160 * operations, *except* those that are 4.1-specific (since 1161 * sessions provide their own EOS), and except for stateful 1162 * operations other than setclientid and setclientid_confirm 1163 * (since sequence numbers provide EOS for open, lock, etc in 1164 * the v4.0 case). 1165 */ 1166 OP_CACHEME = 1 << 6, 1167 /* 1168 * These are ops which clear current state id. 1169 */ 1170 OP_CLEAR_STATEID = 1 << 7, 1171 }; 1172 1173 struct nfsd4_operation { 1174 nfsd4op_func op_func; 1175 u32 op_flags; 1176 char *op_name; 1177 /* Try to get response size before operation */ 1178 nfsd4op_rsize op_rsize_bop; 1179 stateid_getter op_get_currentstateid; 1180 stateid_setter op_set_currentstateid; 1181 }; 1182 1183 static struct nfsd4_operation nfsd4_ops[]; 1184 1185 #ifdef NFSD_DEBUG 1186 static const char *nfsd4_op_name(unsigned opnum); 1187 #endif 1188 1189 /* 1190 * Enforce NFSv4.1 COMPOUND ordering rules: 1191 * 1192 * Also note, enforced elsewhere: 1193 * - SEQUENCE other than as first op results in 1194 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1195 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1196 * (Enforced in nfsd4_bind_conn_to_session().) 1197 * - DESTROY_SESSION must be the final operation in a compound, if 1198 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1199 * (Enforced in nfsd4_destroy_session().) 1200 */ 1201 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1202 { 1203 struct nfsd4_op *op = &args->ops[0]; 1204 1205 /* These ordering requirements don't apply to NFSv4.0: */ 1206 if (args->minorversion == 0) 1207 return nfs_ok; 1208 /* This is weird, but OK, not our problem: */ 1209 if (args->opcnt == 0) 1210 return nfs_ok; 1211 if (op->status == nfserr_op_illegal) 1212 return nfs_ok; 1213 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1214 return nfserr_op_not_in_session; 1215 if (op->opnum == OP_SEQUENCE) 1216 return nfs_ok; 1217 if (args->opcnt != 1) 1218 return nfserr_not_only_op; 1219 return nfs_ok; 1220 } 1221 1222 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1223 { 1224 return &nfsd4_ops[op->opnum]; 1225 } 1226 1227 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1228 { 1229 return OPDESC(op)->op_flags & OP_CACHEME; 1230 } 1231 1232 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1233 { 1234 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1235 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1236 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1237 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1238 struct nfsd4_operation *thisd; 1239 struct nfsd4_operation *nextd; 1240 1241 thisd = OPDESC(this); 1242 /* 1243 * Most ops check wronsec on our own; only the putfh-like ops 1244 * have special rules. 1245 */ 1246 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1247 return false; 1248 /* 1249 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1250 * put-filehandle operation if we're not going to use the 1251 * result: 1252 */ 1253 if (argp->opcnt == resp->opcnt) 1254 return false; 1255 1256 nextd = OPDESC(next); 1257 /* 1258 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1259 * errors themselves as necessary; others should check for them 1260 * now: 1261 */ 1262 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1263 } 1264 1265 /* 1266 * COMPOUND call. 1267 */ 1268 static __be32 1269 nfsd4_proc_compound(struct svc_rqst *rqstp, 1270 struct nfsd4_compoundargs *args, 1271 struct nfsd4_compoundres *resp) 1272 { 1273 struct nfsd4_op *op; 1274 struct nfsd4_operation *opdesc; 1275 struct nfsd4_compound_state *cstate = &resp->cstate; 1276 int slack_bytes; 1277 u32 plen = 0; 1278 __be32 status; 1279 1280 resp->xbuf = &rqstp->rq_res; 1281 resp->p = rqstp->rq_res.head[0].iov_base + 1282 rqstp->rq_res.head[0].iov_len; 1283 resp->tagp = resp->p; 1284 /* reserve space for: taglen, tag, and opcnt */ 1285 resp->p += 2 + XDR_QUADLEN(args->taglen); 1286 resp->end = rqstp->rq_res.head[0].iov_base + PAGE_SIZE; 1287 resp->taglen = args->taglen; 1288 resp->tag = args->tag; 1289 resp->opcnt = 0; 1290 resp->rqstp = rqstp; 1291 resp->cstate.minorversion = args->minorversion; 1292 resp->cstate.replay_owner = NULL; 1293 resp->cstate.session = NULL; 1294 fh_init(&resp->cstate.current_fh, NFS4_FHSIZE); 1295 fh_init(&resp->cstate.save_fh, NFS4_FHSIZE); 1296 /* 1297 * Don't use the deferral mechanism for NFSv4; compounds make it 1298 * too hard to avoid non-idempotency problems. 1299 */ 1300 rqstp->rq_usedeferral = 0; 1301 1302 /* 1303 * According to RFC3010, this takes precedence over all other errors. 1304 */ 1305 status = nfserr_minor_vers_mismatch; 1306 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1307 goto out; 1308 1309 status = nfs41_check_op_ordering(args); 1310 if (status) { 1311 op = &args->ops[0]; 1312 op->status = status; 1313 goto encode_op; 1314 } 1315 1316 while (!status && resp->opcnt < args->opcnt) { 1317 op = &args->ops[resp->opcnt++]; 1318 1319 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1320 resp->opcnt, args->opcnt, op->opnum, 1321 nfsd4_op_name(op->opnum)); 1322 /* 1323 * The XDR decode routines may have pre-set op->status; 1324 * for example, if there is a miscellaneous XDR error 1325 * it will be set to nfserr_bad_xdr. 1326 */ 1327 if (op->status) { 1328 if (op->opnum == OP_OPEN) 1329 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1330 goto encode_op; 1331 } 1332 1333 /* We must be able to encode a successful response to 1334 * this operation, with enough room left over to encode a 1335 * failed response to the next operation. If we don't 1336 * have enough room, fail with ERR_RESOURCE. 1337 */ 1338 slack_bytes = (char *)resp->end - (char *)resp->p; 1339 if (slack_bytes < COMPOUND_SLACK_SPACE 1340 + COMPOUND_ERR_SLACK_SPACE) { 1341 BUG_ON(slack_bytes < COMPOUND_ERR_SLACK_SPACE); 1342 op->status = nfserr_resource; 1343 goto encode_op; 1344 } 1345 1346 opdesc = OPDESC(op); 1347 1348 if (!cstate->current_fh.fh_dentry) { 1349 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1350 op->status = nfserr_nofilehandle; 1351 goto encode_op; 1352 } 1353 } else if (cstate->current_fh.fh_export->ex_fslocs.migrated && 1354 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1355 op->status = nfserr_moved; 1356 goto encode_op; 1357 } 1358 1359 /* If op is non-idempotent */ 1360 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1361 plen = opdesc->op_rsize_bop(rqstp, op); 1362 op->status = nfsd4_check_resp_size(resp, plen); 1363 } 1364 1365 if (op->status) 1366 goto encode_op; 1367 1368 if (opdesc->op_get_currentstateid) 1369 opdesc->op_get_currentstateid(cstate, &op->u); 1370 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1371 1372 if (!op->status) { 1373 if (opdesc->op_set_currentstateid) 1374 opdesc->op_set_currentstateid(cstate, &op->u); 1375 1376 if (opdesc->op_flags & OP_CLEAR_STATEID) 1377 clear_current_stateid(cstate); 1378 1379 if (need_wrongsec_check(rqstp)) 1380 op->status = check_nfsd_access(cstate->current_fh.fh_export, rqstp); 1381 } 1382 1383 encode_op: 1384 /* Only from SEQUENCE */ 1385 if (resp->cstate.status == nfserr_replay_cache) { 1386 dprintk("%s NFS4.1 replay from cache\n", __func__); 1387 status = op->status; 1388 goto out; 1389 } 1390 if (op->status == nfserr_replay_me) { 1391 op->replay = &cstate->replay_owner->so_replay; 1392 nfsd4_encode_replay(resp, op); 1393 status = op->status = op->replay->rp_status; 1394 } else { 1395 nfsd4_encode_operation(resp, op); 1396 status = op->status; 1397 } 1398 1399 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1400 args->ops, args->opcnt, resp->opcnt, op->opnum, 1401 be32_to_cpu(status)); 1402 1403 if (cstate->replay_owner) { 1404 nfs4_unlock_state(); 1405 cstate->replay_owner = NULL; 1406 } 1407 /* XXX Ugh, we need to get rid of this kind of special case: */ 1408 if (op->opnum == OP_READ && op->u.read.rd_filp) 1409 fput(op->u.read.rd_filp); 1410 1411 nfsd4_increment_op_stats(op->opnum); 1412 } 1413 1414 resp->cstate.status = status; 1415 fh_put(&resp->cstate.current_fh); 1416 fh_put(&resp->cstate.save_fh); 1417 BUG_ON(resp->cstate.replay_owner); 1418 out: 1419 /* Reset deferral mechanism for RPC deferrals */ 1420 rqstp->rq_usedeferral = 1; 1421 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1422 return status; 1423 } 1424 1425 #define op_encode_hdr_size (2) 1426 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1427 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1428 #define op_encode_change_info_maxsz (5) 1429 #define nfs4_fattr_bitmap_maxsz (4) 1430 1431 #define op_encode_lockowner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1432 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1433 1434 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1435 1436 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1437 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1438 op_encode_ace_maxsz) 1439 1440 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1441 1442 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1443 { 1444 return (op_encode_hdr_size) * sizeof(__be32); 1445 } 1446 1447 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1448 { 1449 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1450 } 1451 1452 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1453 { 1454 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1455 } 1456 1457 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1458 { 1459 return (op_encode_hdr_size + op_encode_change_info_maxsz 1460 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1461 } 1462 1463 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1464 { 1465 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1466 * sizeof(__be32); 1467 } 1468 1469 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1470 { 1471 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1472 * sizeof(__be32); 1473 } 1474 1475 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1476 { 1477 return (op_encode_hdr_size + op_encode_stateid_maxsz 1478 + op_encode_change_info_maxsz + 1 1479 + nfs4_fattr_bitmap_maxsz 1480 + op_encode_delegation_maxsz) * sizeof(__be32); 1481 } 1482 1483 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1484 { 1485 u32 maxcount = 0, rlen = 0; 1486 1487 maxcount = svc_max_payload(rqstp); 1488 rlen = op->u.read.rd_length; 1489 1490 if (rlen > maxcount) 1491 rlen = maxcount; 1492 1493 return (op_encode_hdr_size + 2) * sizeof(__be32) + rlen; 1494 } 1495 1496 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1497 { 1498 u32 rlen = op->u.readdir.rd_maxcount; 1499 1500 if (rlen > PAGE_SIZE) 1501 rlen = PAGE_SIZE; 1502 1503 return (op_encode_hdr_size + op_encode_verifier_maxsz) 1504 * sizeof(__be32) + rlen; 1505 } 1506 1507 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1508 { 1509 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1510 * sizeof(__be32); 1511 } 1512 1513 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1514 { 1515 return (op_encode_hdr_size + op_encode_change_info_maxsz 1516 + op_encode_change_info_maxsz) * sizeof(__be32); 1517 } 1518 1519 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1520 { 1521 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1522 } 1523 1524 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1525 { 1526 return (op_encode_hdr_size + 2 + 1024) * sizeof(__be32); 1527 } 1528 1529 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1530 { 1531 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1532 } 1533 1534 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1535 { 1536 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1537 1 + 1 + /* eir_flags, spr_how */\ 1538 4 + /* spo_must_enforce & _allow with bitmap */\ 1539 2 + /*eir_server_owner.so_minor_id */\ 1540 /* eir_server_owner.so_major_id<> */\ 1541 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1542 /* eir_server_scope<> */\ 1543 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1544 1 + /* eir_server_impl_id array length */\ 1545 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1546 } 1547 1548 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1549 { 1550 return (op_encode_hdr_size + \ 1551 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1552 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1553 } 1554 1555 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1556 { 1557 return (op_encode_hdr_size + \ 1558 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1559 2 + /* csr_sequence, csr_flags */\ 1560 op_encode_channel_attrs_maxsz + \ 1561 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1562 } 1563 1564 static struct nfsd4_operation nfsd4_ops[] = { 1565 [OP_ACCESS] = { 1566 .op_func = (nfsd4op_func)nfsd4_access, 1567 .op_name = "OP_ACCESS", 1568 }, 1569 [OP_CLOSE] = { 1570 .op_func = (nfsd4op_func)nfsd4_close, 1571 .op_flags = OP_MODIFIES_SOMETHING, 1572 .op_name = "OP_CLOSE", 1573 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1574 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 1575 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 1576 }, 1577 [OP_COMMIT] = { 1578 .op_func = (nfsd4op_func)nfsd4_commit, 1579 .op_flags = OP_MODIFIES_SOMETHING, 1580 .op_name = "OP_COMMIT", 1581 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 1582 }, 1583 [OP_CREATE] = { 1584 .op_func = (nfsd4op_func)nfsd4_create, 1585 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 1586 .op_name = "OP_CREATE", 1587 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 1588 }, 1589 [OP_DELEGRETURN] = { 1590 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1591 .op_flags = OP_MODIFIES_SOMETHING, 1592 .op_name = "OP_DELEGRETURN", 1593 .op_rsize_bop = nfsd4_only_status_rsize, 1594 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 1595 }, 1596 [OP_GETATTR] = { 1597 .op_func = (nfsd4op_func)nfsd4_getattr, 1598 .op_flags = ALLOWED_ON_ABSENT_FS, 1599 .op_name = "OP_GETATTR", 1600 }, 1601 [OP_GETFH] = { 1602 .op_func = (nfsd4op_func)nfsd4_getfh, 1603 .op_name = "OP_GETFH", 1604 }, 1605 [OP_LINK] = { 1606 .op_func = (nfsd4op_func)nfsd4_link, 1607 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 1608 | OP_CACHEME, 1609 .op_name = "OP_LINK", 1610 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 1611 }, 1612 [OP_LOCK] = { 1613 .op_func = (nfsd4op_func)nfsd4_lock, 1614 .op_flags = OP_MODIFIES_SOMETHING, 1615 .op_name = "OP_LOCK", 1616 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 1617 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 1618 }, 1619 [OP_LOCKT] = { 1620 .op_func = (nfsd4op_func)nfsd4_lockt, 1621 .op_name = "OP_LOCKT", 1622 }, 1623 [OP_LOCKU] = { 1624 .op_func = (nfsd4op_func)nfsd4_locku, 1625 .op_flags = OP_MODIFIES_SOMETHING, 1626 .op_name = "OP_LOCKU", 1627 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1628 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 1629 }, 1630 [OP_LOOKUP] = { 1631 .op_func = (nfsd4op_func)nfsd4_lookup, 1632 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1633 .op_name = "OP_LOOKUP", 1634 }, 1635 [OP_LOOKUPP] = { 1636 .op_func = (nfsd4op_func)nfsd4_lookupp, 1637 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1638 .op_name = "OP_LOOKUPP", 1639 }, 1640 [OP_NVERIFY] = { 1641 .op_func = (nfsd4op_func)nfsd4_nverify, 1642 .op_name = "OP_NVERIFY", 1643 }, 1644 [OP_OPEN] = { 1645 .op_func = (nfsd4op_func)nfsd4_open, 1646 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1647 .op_name = "OP_OPEN", 1648 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 1649 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 1650 }, 1651 [OP_OPEN_CONFIRM] = { 1652 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1653 .op_flags = OP_MODIFIES_SOMETHING, 1654 .op_name = "OP_OPEN_CONFIRM", 1655 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1656 }, 1657 [OP_OPEN_DOWNGRADE] = { 1658 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1659 .op_flags = OP_MODIFIES_SOMETHING, 1660 .op_name = "OP_OPEN_DOWNGRADE", 1661 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1662 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 1663 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 1664 }, 1665 [OP_PUTFH] = { 1666 .op_func = (nfsd4op_func)nfsd4_putfh, 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_PUTFH", 1671 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1672 }, 1673 [OP_PUTPUBFH] = { 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_PUTPUBFH", 1679 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1680 }, 1681 [OP_PUTROOTFH] = { 1682 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1683 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1684 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING 1685 | OP_CLEAR_STATEID, 1686 .op_name = "OP_PUTROOTFH", 1687 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1688 }, 1689 [OP_READ] = { 1690 .op_func = (nfsd4op_func)nfsd4_read, 1691 .op_flags = OP_MODIFIES_SOMETHING, 1692 .op_name = "OP_READ", 1693 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 1694 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 1695 }, 1696 [OP_READDIR] = { 1697 .op_func = (nfsd4op_func)nfsd4_readdir, 1698 .op_flags = OP_MODIFIES_SOMETHING, 1699 .op_name = "OP_READDIR", 1700 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 1701 }, 1702 [OP_READLINK] = { 1703 .op_func = (nfsd4op_func)nfsd4_readlink, 1704 .op_name = "OP_READLINK", 1705 }, 1706 [OP_REMOVE] = { 1707 .op_func = (nfsd4op_func)nfsd4_remove, 1708 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1709 .op_name = "OP_REMOVE", 1710 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 1711 }, 1712 [OP_RENAME] = { 1713 .op_func = (nfsd4op_func)nfsd4_rename, 1714 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1715 .op_name = "OP_RENAME", 1716 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 1717 }, 1718 [OP_RENEW] = { 1719 .op_func = (nfsd4op_func)nfsd4_renew, 1720 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1721 | OP_MODIFIES_SOMETHING, 1722 .op_name = "OP_RENEW", 1723 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1724 1725 }, 1726 [OP_RESTOREFH] = { 1727 .op_func = (nfsd4op_func)nfsd4_restorefh, 1728 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1729 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 1730 .op_name = "OP_RESTOREFH", 1731 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1732 }, 1733 [OP_SAVEFH] = { 1734 .op_func = (nfsd4op_func)nfsd4_savefh, 1735 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1736 .op_name = "OP_SAVEFH", 1737 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1738 }, 1739 [OP_SECINFO] = { 1740 .op_func = (nfsd4op_func)nfsd4_secinfo, 1741 .op_flags = OP_HANDLES_WRONGSEC, 1742 .op_name = "OP_SECINFO", 1743 }, 1744 [OP_SETATTR] = { 1745 .op_func = (nfsd4op_func)nfsd4_setattr, 1746 .op_name = "OP_SETATTR", 1747 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1748 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 1749 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 1750 }, 1751 [OP_SETCLIENTID] = { 1752 .op_func = (nfsd4op_func)nfsd4_setclientid, 1753 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1754 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1755 .op_name = "OP_SETCLIENTID", 1756 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 1757 }, 1758 [OP_SETCLIENTID_CONFIRM] = { 1759 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1760 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1761 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1762 .op_name = "OP_SETCLIENTID_CONFIRM", 1763 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1764 }, 1765 [OP_VERIFY] = { 1766 .op_func = (nfsd4op_func)nfsd4_verify, 1767 .op_name = "OP_VERIFY", 1768 }, 1769 [OP_WRITE] = { 1770 .op_func = (nfsd4op_func)nfsd4_write, 1771 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1772 .op_name = "OP_WRITE", 1773 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 1774 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 1775 }, 1776 [OP_RELEASE_LOCKOWNER] = { 1777 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1778 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1779 | OP_MODIFIES_SOMETHING, 1780 .op_name = "OP_RELEASE_LOCKOWNER", 1781 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1782 }, 1783 1784 /* NFSv4.1 operations */ 1785 [OP_EXCHANGE_ID] = { 1786 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1787 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1788 | OP_MODIFIES_SOMETHING, 1789 .op_name = "OP_EXCHANGE_ID", 1790 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 1791 }, 1792 [OP_BACKCHANNEL_CTL] = { 1793 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 1794 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1795 .op_name = "OP_BACKCHANNEL_CTL", 1796 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1797 }, 1798 [OP_BIND_CONN_TO_SESSION] = { 1799 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 1800 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1801 | OP_MODIFIES_SOMETHING, 1802 .op_name = "OP_BIND_CONN_TO_SESSION", 1803 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 1804 }, 1805 [OP_CREATE_SESSION] = { 1806 .op_func = (nfsd4op_func)nfsd4_create_session, 1807 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1808 | OP_MODIFIES_SOMETHING, 1809 .op_name = "OP_CREATE_SESSION", 1810 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 1811 }, 1812 [OP_DESTROY_SESSION] = { 1813 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1814 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1815 | OP_MODIFIES_SOMETHING, 1816 .op_name = "OP_DESTROY_SESSION", 1817 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1818 }, 1819 [OP_SEQUENCE] = { 1820 .op_func = (nfsd4op_func)nfsd4_sequence, 1821 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1822 .op_name = "OP_SEQUENCE", 1823 }, 1824 [OP_DESTROY_CLIENTID] = { 1825 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 1826 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1827 | OP_MODIFIES_SOMETHING, 1828 .op_name = "OP_DESTROY_CLIENTID", 1829 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1830 }, 1831 [OP_RECLAIM_COMPLETE] = { 1832 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 1833 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1834 .op_name = "OP_RECLAIM_COMPLETE", 1835 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1836 }, 1837 [OP_SECINFO_NO_NAME] = { 1838 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 1839 .op_flags = OP_HANDLES_WRONGSEC, 1840 .op_name = "OP_SECINFO_NO_NAME", 1841 }, 1842 [OP_TEST_STATEID] = { 1843 .op_func = (nfsd4op_func)nfsd4_test_stateid, 1844 .op_flags = ALLOWED_WITHOUT_FH, 1845 .op_name = "OP_TEST_STATEID", 1846 }, 1847 [OP_FREE_STATEID] = { 1848 .op_func = (nfsd4op_func)nfsd4_free_stateid, 1849 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1850 .op_name = "OP_FREE_STATEID", 1851 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 1852 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1853 }, 1854 }; 1855 1856 #ifdef NFSD_DEBUG 1857 static const char *nfsd4_op_name(unsigned opnum) 1858 { 1859 if (opnum < ARRAY_SIZE(nfsd4_ops)) 1860 return nfsd4_ops[opnum].op_name; 1861 return "unknown_operation"; 1862 } 1863 #endif 1864 1865 #define nfsd4_voidres nfsd4_voidargs 1866 struct nfsd4_voidargs { int dummy; }; 1867 1868 static struct svc_procedure nfsd_procedures4[2] = { 1869 [NFSPROC4_NULL] = { 1870 .pc_func = (svc_procfunc) nfsd4_proc_null, 1871 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 1872 .pc_argsize = sizeof(struct nfsd4_voidargs), 1873 .pc_ressize = sizeof(struct nfsd4_voidres), 1874 .pc_cachetype = RC_NOCACHE, 1875 .pc_xdrressize = 1, 1876 }, 1877 [NFSPROC4_COMPOUND] = { 1878 .pc_func = (svc_procfunc) nfsd4_proc_compound, 1879 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 1880 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 1881 .pc_argsize = sizeof(struct nfsd4_compoundargs), 1882 .pc_ressize = sizeof(struct nfsd4_compoundres), 1883 .pc_release = nfsd4_release_compoundargs, 1884 .pc_cachetype = RC_NOCACHE, 1885 .pc_xdrressize = NFSD_BUFSIZE/4, 1886 }, 1887 }; 1888 1889 struct svc_version nfsd_version4 = { 1890 .vs_vers = 4, 1891 .vs_nproc = 2, 1892 .vs_proc = nfsd_procedures4, 1893 .vs_dispatch = nfsd_dispatch, 1894 .vs_xdrsize = NFS4_SVC_XDRSIZE, 1895 .vs_rpcb_optnl = 1, 1896 }; 1897 1898 /* 1899 * Local variables: 1900 * c-basic-offset: 8 1901 * End: 1902 */ 1903