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 status = nfs4_check_open_reclaim(&open->op_clientid, 434 cstate->minorversion, 435 nn); 436 if (status) 437 goto out; 438 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 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 dprintk("NFSD: unsupported OPEN claim type %d\n", 449 open->op_claim_type); 450 status = nfserr_notsupp; 451 goto out; 452 default: 453 dprintk("NFSD: Invalid OPEN claim type %d\n", 454 open->op_claim_type); 455 status = nfserr_inval; 456 goto out; 457 } 458 /* 459 * nfsd4_process_open2() does the actual opening of the file. If 460 * successful, it (1) truncates the file if open->op_truncate was 461 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 462 */ 463 status = nfsd4_process_open2(rqstp, resfh, open); 464 WARN_ON(status && open->op_created); 465 out: 466 if (resfh && resfh != &cstate->current_fh) { 467 fh_dup2(&cstate->current_fh, resfh); 468 fh_put(resfh); 469 kfree(resfh); 470 } 471 nfsd4_cleanup_open_state(open, status); 472 if (open->op_openowner && !nfsd4_has_session(cstate)) 473 cstate->replay_owner = &open->op_openowner->oo_owner; 474 nfsd4_bump_seqid(cstate, status); 475 if (!cstate->replay_owner) 476 nfs4_unlock_state(); 477 return status; 478 } 479 480 /* 481 * OPEN is the only seqid-mutating operation whose decoding can fail 482 * with a seqid-mutating error (specifically, decoding of user names in 483 * the attributes). Therefore we have to do some processing to look up 484 * the stateowner so that we can bump the seqid. 485 */ 486 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 487 { 488 struct nfsd4_open *open = (struct nfsd4_open *)&op->u; 489 490 if (!seqid_mutating_err(ntohl(op->status))) 491 return op->status; 492 if (nfsd4_has_session(cstate)) 493 return op->status; 494 open->op_xdr_error = op->status; 495 return nfsd4_open(rqstp, cstate, open); 496 } 497 498 /* 499 * filehandle-manipulating ops. 500 */ 501 static __be32 502 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 503 struct svc_fh **getfh) 504 { 505 if (!cstate->current_fh.fh_dentry) 506 return nfserr_nofilehandle; 507 508 *getfh = &cstate->current_fh; 509 return nfs_ok; 510 } 511 512 static __be32 513 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 514 struct nfsd4_putfh *putfh) 515 { 516 fh_put(&cstate->current_fh); 517 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 518 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 519 putfh->pf_fhlen); 520 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 521 } 522 523 static __be32 524 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 525 void *arg) 526 { 527 __be32 status; 528 529 fh_put(&cstate->current_fh); 530 status = exp_pseudoroot(rqstp, &cstate->current_fh); 531 return status; 532 } 533 534 static __be32 535 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 536 void *arg) 537 { 538 if (!cstate->save_fh.fh_dentry) 539 return nfserr_restorefh; 540 541 fh_dup2(&cstate->current_fh, &cstate->save_fh); 542 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 543 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 544 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 545 } 546 return nfs_ok; 547 } 548 549 static __be32 550 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 551 void *arg) 552 { 553 if (!cstate->current_fh.fh_dentry) 554 return nfserr_nofilehandle; 555 556 fh_dup2(&cstate->save_fh, &cstate->current_fh); 557 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 558 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 559 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 560 } 561 return nfs_ok; 562 } 563 564 /* 565 * misc nfsv4 ops 566 */ 567 static __be32 568 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 569 struct nfsd4_access *access) 570 { 571 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 572 return nfserr_inval; 573 574 access->ac_resp_access = access->ac_req_access; 575 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 576 &access->ac_supported); 577 } 578 579 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 580 { 581 __be32 verf[2]; 582 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 583 584 verf[0] = (__be32)nn->nfssvc_boot.tv_sec; 585 verf[1] = (__be32)nn->nfssvc_boot.tv_usec; 586 memcpy(verifier->data, verf, sizeof(verifier->data)); 587 } 588 589 static __be32 590 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 591 struct nfsd4_commit *commit) 592 { 593 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 594 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 595 commit->co_count); 596 } 597 598 static __be32 599 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 600 struct nfsd4_create *create) 601 { 602 struct svc_fh resfh; 603 __be32 status; 604 dev_t rdev; 605 606 fh_init(&resfh, NFS4_FHSIZE); 607 608 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 609 NFSD_MAY_CREATE); 610 if (status) 611 return status; 612 613 status = check_attr_support(rqstp, cstate, create->cr_bmval, 614 nfsd_attrmask); 615 if (status) 616 return status; 617 618 switch (create->cr_type) { 619 case NF4LNK: 620 /* ugh! we have to null-terminate the linktext, or 621 * vfs_symlink() will choke. it is always safe to 622 * null-terminate by brute force, since at worst we 623 * will overwrite the first byte of the create namelen 624 * in the XDR buffer, which has already been extracted 625 * during XDR decode. 626 */ 627 create->cr_linkname[create->cr_linklen] = 0; 628 629 status = nfsd_symlink(rqstp, &cstate->current_fh, 630 create->cr_name, create->cr_namelen, 631 create->cr_linkname, create->cr_linklen, 632 &resfh, &create->cr_iattr); 633 break; 634 635 case NF4BLK: 636 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 637 if (MAJOR(rdev) != create->cr_specdata1 || 638 MINOR(rdev) != create->cr_specdata2) 639 return nfserr_inval; 640 status = nfsd_create(rqstp, &cstate->current_fh, 641 create->cr_name, create->cr_namelen, 642 &create->cr_iattr, S_IFBLK, rdev, &resfh); 643 break; 644 645 case NF4CHR: 646 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 647 if (MAJOR(rdev) != create->cr_specdata1 || 648 MINOR(rdev) != create->cr_specdata2) 649 return nfserr_inval; 650 status = nfsd_create(rqstp, &cstate->current_fh, 651 create->cr_name, create->cr_namelen, 652 &create->cr_iattr,S_IFCHR, rdev, &resfh); 653 break; 654 655 case NF4SOCK: 656 status = nfsd_create(rqstp, &cstate->current_fh, 657 create->cr_name, create->cr_namelen, 658 &create->cr_iattr, S_IFSOCK, 0, &resfh); 659 break; 660 661 case NF4FIFO: 662 status = nfsd_create(rqstp, &cstate->current_fh, 663 create->cr_name, create->cr_namelen, 664 &create->cr_iattr, S_IFIFO, 0, &resfh); 665 break; 666 667 case NF4DIR: 668 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 669 status = nfsd_create(rqstp, &cstate->current_fh, 670 create->cr_name, create->cr_namelen, 671 &create->cr_iattr, S_IFDIR, 0, &resfh); 672 break; 673 674 default: 675 status = nfserr_badtype; 676 } 677 678 if (status) 679 goto out; 680 681 if (create->cr_label.len) 682 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 683 684 if (create->cr_acl != NULL) 685 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 686 create->cr_bmval); 687 688 fh_unlock(&cstate->current_fh); 689 set_change_info(&create->cr_cinfo, &cstate->current_fh); 690 fh_dup2(&cstate->current_fh, &resfh); 691 out: 692 fh_put(&resfh); 693 return status; 694 } 695 696 static __be32 697 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 698 struct nfsd4_getattr *getattr) 699 { 700 __be32 status; 701 702 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 703 if (status) 704 return status; 705 706 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 707 return nfserr_inval; 708 709 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 710 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 711 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 712 713 getattr->ga_fhp = &cstate->current_fh; 714 return nfs_ok; 715 } 716 717 static __be32 718 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 719 struct nfsd4_link *link) 720 { 721 __be32 status = nfserr_nofilehandle; 722 723 if (!cstate->save_fh.fh_dentry) 724 return status; 725 status = nfsd_link(rqstp, &cstate->current_fh, 726 link->li_name, link->li_namelen, &cstate->save_fh); 727 if (!status) 728 set_change_info(&link->li_cinfo, &cstate->current_fh); 729 return status; 730 } 731 732 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 733 { 734 struct svc_fh tmp_fh; 735 __be32 ret; 736 737 fh_init(&tmp_fh, NFS4_FHSIZE); 738 ret = exp_pseudoroot(rqstp, &tmp_fh); 739 if (ret) 740 return ret; 741 if (tmp_fh.fh_dentry == fh->fh_dentry) { 742 fh_put(&tmp_fh); 743 return nfserr_noent; 744 } 745 fh_put(&tmp_fh); 746 return nfsd_lookup(rqstp, fh, "..", 2, fh); 747 } 748 749 static __be32 750 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 751 void *arg) 752 { 753 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 754 } 755 756 static __be32 757 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 758 struct nfsd4_lookup *lookup) 759 { 760 return nfsd_lookup(rqstp, &cstate->current_fh, 761 lookup->lo_name, lookup->lo_len, 762 &cstate->current_fh); 763 } 764 765 static __be32 766 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 767 struct nfsd4_read *read) 768 { 769 __be32 status; 770 771 /* no need to check permission - this will be done in nfsd_read() */ 772 773 read->rd_filp = NULL; 774 if (read->rd_offset >= OFFSET_MAX) 775 return nfserr_inval; 776 777 /* 778 * If we do a zero copy read, then a client will see read data 779 * that reflects the state of the file *after* performing the 780 * following compound. 781 * 782 * To ensure proper ordering, we therefore turn off zero copy if 783 * the client wants us to do more in this compound: 784 */ 785 if (!nfsd4_last_compound_op(rqstp)) 786 rqstp->rq_splice_ok = false; 787 788 /* check stateid */ 789 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 790 cstate, &read->rd_stateid, 791 RD_STATE, &read->rd_filp))) { 792 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 793 goto out; 794 } 795 status = nfs_ok; 796 out: 797 read->rd_rqstp = rqstp; 798 read->rd_fhp = &cstate->current_fh; 799 return status; 800 } 801 802 static __be32 803 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 804 struct nfsd4_readdir *readdir) 805 { 806 u64 cookie = readdir->rd_cookie; 807 static const nfs4_verifier zeroverf; 808 809 /* no need to check permission - this will be done in nfsd_readdir() */ 810 811 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 812 return nfserr_inval; 813 814 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 815 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 816 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 817 818 if ((cookie == 1) || (cookie == 2) || 819 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 820 return nfserr_bad_cookie; 821 822 readdir->rd_rqstp = rqstp; 823 readdir->rd_fhp = &cstate->current_fh; 824 return nfs_ok; 825 } 826 827 static __be32 828 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 829 struct nfsd4_readlink *readlink) 830 { 831 readlink->rl_rqstp = rqstp; 832 readlink->rl_fhp = &cstate->current_fh; 833 return nfs_ok; 834 } 835 836 static __be32 837 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 838 struct nfsd4_remove *remove) 839 { 840 __be32 status; 841 842 if (locks_in_grace(SVC_NET(rqstp))) 843 return nfserr_grace; 844 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 845 remove->rm_name, remove->rm_namelen); 846 if (!status) { 847 fh_unlock(&cstate->current_fh); 848 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 849 } 850 return status; 851 } 852 853 static __be32 854 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 855 struct nfsd4_rename *rename) 856 { 857 __be32 status = nfserr_nofilehandle; 858 859 if (!cstate->save_fh.fh_dentry) 860 return status; 861 if (locks_in_grace(SVC_NET(rqstp)) && 862 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 863 return nfserr_grace; 864 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 865 rename->rn_snamelen, &cstate->current_fh, 866 rename->rn_tname, rename->rn_tnamelen); 867 if (status) 868 return status; 869 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 870 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 871 return nfs_ok; 872 } 873 874 static __be32 875 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 876 struct nfsd4_secinfo *secinfo) 877 { 878 struct svc_fh resfh; 879 struct svc_export *exp; 880 struct dentry *dentry; 881 __be32 err; 882 883 fh_init(&resfh, NFS4_FHSIZE); 884 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 885 if (err) 886 return err; 887 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 888 secinfo->si_name, secinfo->si_namelen, 889 &exp, &dentry); 890 if (err) 891 return err; 892 if (dentry->d_inode == NULL) { 893 exp_put(exp); 894 err = nfserr_noent; 895 } else 896 secinfo->si_exp = exp; 897 dput(dentry); 898 if (cstate->minorversion) 899 /* See rfc 5661 section 2.6.3.1.1.8 */ 900 fh_put(&cstate->current_fh); 901 return err; 902 } 903 904 static __be32 905 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 906 struct nfsd4_secinfo_no_name *sin) 907 { 908 __be32 err; 909 910 switch (sin->sin_style) { 911 case NFS4_SECINFO_STYLE4_CURRENT_FH: 912 break; 913 case NFS4_SECINFO_STYLE4_PARENT: 914 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 915 if (err) 916 return err; 917 break; 918 default: 919 return nfserr_inval; 920 } 921 exp_get(cstate->current_fh.fh_export); 922 sin->sin_exp = cstate->current_fh.fh_export; 923 fh_put(&cstate->current_fh); 924 return nfs_ok; 925 } 926 927 static __be32 928 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 929 struct nfsd4_setattr *setattr) 930 { 931 __be32 status = nfs_ok; 932 int err; 933 934 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 935 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 936 &setattr->sa_stateid, WR_STATE, NULL); 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 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 1003 cstate, stateid, WR_STATE, &filp); 1004 if (status) { 1005 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 1006 return status; 1007 } 1008 1009 cnt = write->wr_buflen; 1010 write->wr_how_written = write->wr_stable_how; 1011 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 1012 1013 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1014 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1015 1016 status = nfsd_write(rqstp, &cstate->current_fh, filp, 1017 write->wr_offset, rqstp->rq_vec, nvecs, 1018 &cnt, &write->wr_how_written); 1019 if (filp) 1020 fput(filp); 1021 1022 write->wr_bytes_written = cnt; 1023 1024 return status; 1025 } 1026 1027 /* This routine never returns NFS_OK! If there are no other errors, it 1028 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1029 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1030 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1031 */ 1032 static __be32 1033 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1034 struct nfsd4_verify *verify) 1035 { 1036 __be32 *buf, *p; 1037 int count; 1038 __be32 status; 1039 1040 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1041 if (status) 1042 return status; 1043 1044 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1045 if (status) 1046 return status; 1047 1048 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1049 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1050 return nfserr_inval; 1051 if (verify->ve_attrlen & 3) 1052 return nfserr_inval; 1053 1054 /* count in words: 1055 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1056 */ 1057 count = 4 + (verify->ve_attrlen >> 2); 1058 buf = kmalloc(count << 2, GFP_KERNEL); 1059 if (!buf) 1060 return nfserr_jukebox; 1061 1062 p = buf; 1063 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1064 cstate->current_fh.fh_export, 1065 cstate->current_fh.fh_dentry, 1066 verify->ve_bmval, 1067 rqstp, 0); 1068 /* 1069 * If nfsd4_encode_fattr() ran out of space, assume that's because 1070 * the attributes are longer (hence different) than those given: 1071 */ 1072 if (status == nfserr_resource) 1073 status = nfserr_not_same; 1074 if (status) 1075 goto out_kfree; 1076 1077 /* skip bitmap */ 1078 p = buf + 1 + ntohl(buf[0]); 1079 status = nfserr_not_same; 1080 if (ntohl(*p++) != verify->ve_attrlen) 1081 goto out_kfree; 1082 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1083 status = nfserr_same; 1084 1085 out_kfree: 1086 kfree(buf); 1087 return status; 1088 } 1089 1090 static __be32 1091 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1092 struct nfsd4_verify *verify) 1093 { 1094 __be32 status; 1095 1096 status = _nfsd4_verify(rqstp, cstate, verify); 1097 return status == nfserr_not_same ? nfs_ok : status; 1098 } 1099 1100 static __be32 1101 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1102 struct nfsd4_verify *verify) 1103 { 1104 __be32 status; 1105 1106 status = _nfsd4_verify(rqstp, cstate, verify); 1107 return status == nfserr_same ? nfs_ok : status; 1108 } 1109 1110 /* 1111 * NULL call. 1112 */ 1113 static __be32 1114 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1115 { 1116 return nfs_ok; 1117 } 1118 1119 static inline void nfsd4_increment_op_stats(u32 opnum) 1120 { 1121 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1122 nfsdstats.nfs4_opcount[opnum]++; 1123 } 1124 1125 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1126 void *); 1127 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1128 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1129 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1130 1131 enum nfsd4_op_flags { 1132 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1133 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1134 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1135 /* For rfc 5661 section 2.6.3.1.1: */ 1136 OP_HANDLES_WRONGSEC = 1 << 3, 1137 OP_IS_PUTFH_LIKE = 1 << 4, 1138 /* 1139 * These are the ops whose result size we estimate before 1140 * encoding, to avoid performing an op then not being able to 1141 * respond or cache a response. This includes writes and setattrs 1142 * as well as the operations usually called "nonidempotent": 1143 */ 1144 OP_MODIFIES_SOMETHING = 1 << 5, 1145 /* 1146 * Cache compounds containing these ops in the xid-based drc: 1147 * We use the DRC for compounds containing non-idempotent 1148 * operations, *except* those that are 4.1-specific (since 1149 * sessions provide their own EOS), and except for stateful 1150 * operations other than setclientid and setclientid_confirm 1151 * (since sequence numbers provide EOS for open, lock, etc in 1152 * the v4.0 case). 1153 */ 1154 OP_CACHEME = 1 << 6, 1155 /* 1156 * These are ops which clear current state id. 1157 */ 1158 OP_CLEAR_STATEID = 1 << 7, 1159 }; 1160 1161 struct nfsd4_operation { 1162 nfsd4op_func op_func; 1163 u32 op_flags; 1164 char *op_name; 1165 /* Try to get response size before operation */ 1166 nfsd4op_rsize op_rsize_bop; 1167 stateid_getter op_get_currentstateid; 1168 stateid_setter op_set_currentstateid; 1169 }; 1170 1171 static struct nfsd4_operation nfsd4_ops[]; 1172 1173 static const char *nfsd4_op_name(unsigned opnum); 1174 1175 /* 1176 * Enforce NFSv4.1 COMPOUND ordering rules: 1177 * 1178 * Also note, enforced elsewhere: 1179 * - SEQUENCE other than as first op results in 1180 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1181 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1182 * (Enforced in nfsd4_bind_conn_to_session().) 1183 * - DESTROY_SESSION must be the final operation in a compound, if 1184 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1185 * (Enforced in nfsd4_destroy_session().) 1186 */ 1187 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1188 { 1189 struct nfsd4_op *op = &args->ops[0]; 1190 1191 /* These ordering requirements don't apply to NFSv4.0: */ 1192 if (args->minorversion == 0) 1193 return nfs_ok; 1194 /* This is weird, but OK, not our problem: */ 1195 if (args->opcnt == 0) 1196 return nfs_ok; 1197 if (op->status == nfserr_op_illegal) 1198 return nfs_ok; 1199 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1200 return nfserr_op_not_in_session; 1201 if (op->opnum == OP_SEQUENCE) 1202 return nfs_ok; 1203 if (args->opcnt != 1) 1204 return nfserr_not_only_op; 1205 return nfs_ok; 1206 } 1207 1208 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1209 { 1210 return &nfsd4_ops[op->opnum]; 1211 } 1212 1213 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1214 { 1215 if (op->opnum == OP_ILLEGAL) 1216 return false; 1217 return OPDESC(op)->op_flags & OP_CACHEME; 1218 } 1219 1220 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1221 { 1222 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1223 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1224 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1225 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1226 struct nfsd4_operation *thisd; 1227 struct nfsd4_operation *nextd; 1228 1229 thisd = OPDESC(this); 1230 /* 1231 * Most ops check wronsec on our own; only the putfh-like ops 1232 * have special rules. 1233 */ 1234 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1235 return false; 1236 /* 1237 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1238 * put-filehandle operation if we're not going to use the 1239 * result: 1240 */ 1241 if (argp->opcnt == resp->opcnt) 1242 return false; 1243 1244 nextd = OPDESC(next); 1245 /* 1246 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1247 * errors themselves as necessary; others should check for them 1248 * now: 1249 */ 1250 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1251 } 1252 1253 static void svcxdr_init_encode(struct svc_rqst *rqstp, 1254 struct nfsd4_compoundres *resp) 1255 { 1256 struct xdr_stream *xdr = &resp->xdr; 1257 struct xdr_buf *buf = &rqstp->rq_res; 1258 struct kvec *head = buf->head; 1259 1260 xdr->buf = buf; 1261 xdr->iov = head; 1262 xdr->p = head->iov_base + head->iov_len; 1263 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1264 /* Tail and page_len should be zero at this point: */ 1265 buf->len = buf->head[0].iov_len; 1266 xdr->scratch.iov_len = 0; 1267 xdr->page_ptr = buf->pages - 1; 1268 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1269 - rqstp->rq_auth_slack; 1270 } 1271 1272 /* 1273 * COMPOUND call. 1274 */ 1275 static __be32 1276 nfsd4_proc_compound(struct svc_rqst *rqstp, 1277 struct nfsd4_compoundargs *args, 1278 struct nfsd4_compoundres *resp) 1279 { 1280 struct nfsd4_op *op; 1281 struct nfsd4_operation *opdesc; 1282 struct nfsd4_compound_state *cstate = &resp->cstate; 1283 struct svc_fh *current_fh = &cstate->current_fh; 1284 struct svc_fh *save_fh = &cstate->save_fh; 1285 __be32 status; 1286 1287 svcxdr_init_encode(rqstp, resp); 1288 resp->tagp = resp->xdr.p; 1289 /* reserve space for: taglen, tag, and opcnt */ 1290 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1291 resp->taglen = args->taglen; 1292 resp->tag = args->tag; 1293 resp->rqstp = rqstp; 1294 cstate->minorversion = args->minorversion; 1295 fh_init(current_fh, NFS4_FHSIZE); 1296 fh_init(save_fh, NFS4_FHSIZE); 1297 /* 1298 * Don't use the deferral mechanism for NFSv4; compounds make it 1299 * too hard to avoid non-idempotency problems. 1300 */ 1301 rqstp->rq_usedeferral = 0; 1302 1303 /* 1304 * According to RFC3010, this takes precedence over all other errors. 1305 */ 1306 status = nfserr_minor_vers_mismatch; 1307 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1308 goto out; 1309 1310 status = nfs41_check_op_ordering(args); 1311 if (status) { 1312 op = &args->ops[0]; 1313 op->status = status; 1314 goto encode_op; 1315 } 1316 1317 while (!status && resp->opcnt < args->opcnt) { 1318 op = &args->ops[resp->opcnt++]; 1319 1320 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1321 resp->opcnt, args->opcnt, op->opnum, 1322 nfsd4_op_name(op->opnum)); 1323 /* 1324 * The XDR decode routines may have pre-set op->status; 1325 * for example, if there is a miscellaneous XDR error 1326 * it will be set to nfserr_bad_xdr. 1327 */ 1328 if (op->status) { 1329 if (op->opnum == OP_OPEN) 1330 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1331 goto encode_op; 1332 } 1333 1334 opdesc = OPDESC(op); 1335 1336 if (!current_fh->fh_dentry) { 1337 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1338 op->status = nfserr_nofilehandle; 1339 goto encode_op; 1340 } 1341 } else if (current_fh->fh_export->ex_fslocs.migrated && 1342 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1343 op->status = nfserr_moved; 1344 goto encode_op; 1345 } 1346 1347 fh_clear_wcc(current_fh); 1348 1349 /* If op is non-idempotent */ 1350 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1351 /* 1352 * Don't execute this op if we couldn't encode a 1353 * succesful reply: 1354 */ 1355 u32 plen = opdesc->op_rsize_bop(rqstp, op); 1356 /* 1357 * Plus if there's another operation, make sure 1358 * we'll have space to at least encode an error: 1359 */ 1360 if (resp->opcnt < args->opcnt) 1361 plen += COMPOUND_ERR_SLACK_SPACE; 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(current_fh->fh_export, rqstp); 1381 } 1382 1383 encode_op: 1384 /* Only from SEQUENCE */ 1385 if (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->xdr, 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 cstate->status = status; 1415 fh_put(current_fh); 1416 fh_put(save_fh); 1417 BUG_ON(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 /* We'll fall back on returning no lockowner if run out of space: */ 1432 #define op_encode_lockowner_maxsz (0) 1433 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1434 1435 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1436 1437 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1438 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1439 op_encode_ace_maxsz) 1440 1441 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1442 1443 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1444 { 1445 return (op_encode_hdr_size) * sizeof(__be32); 1446 } 1447 1448 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1449 { 1450 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1451 } 1452 1453 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1454 { 1455 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1456 } 1457 1458 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1459 { 1460 return (op_encode_hdr_size + op_encode_change_info_maxsz 1461 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1462 } 1463 1464 /* 1465 * Note since this is an idempotent operation we won't insist on failing 1466 * the op prematurely if the estimate is too large. We may turn off splice 1467 * reads unnecessarily. 1468 */ 1469 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1470 struct nfsd4_op *op) 1471 { 1472 u32 *bmap = op->u.getattr.ga_bmval; 1473 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1474 u32 ret = 0; 1475 1476 if (bmap0 & FATTR4_WORD0_ACL) 1477 return svc_max_payload(rqstp); 1478 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1479 return svc_max_payload(rqstp); 1480 1481 if (bmap1 & FATTR4_WORD1_OWNER) { 1482 ret += IDMAP_NAMESZ + 4; 1483 bmap1 &= ~FATTR4_WORD1_OWNER; 1484 } 1485 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1486 ret += IDMAP_NAMESZ + 4; 1487 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1488 } 1489 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1490 ret += NFS4_FHSIZE + 4; 1491 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1492 } 1493 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1494 ret += NFSD4_MAX_SEC_LABEL_LEN + 12; 1495 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1496 } 1497 /* 1498 * Largest of remaining attributes are 16 bytes (e.g., 1499 * supported_attributes) 1500 */ 1501 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1502 /* bitmask, length */ 1503 ret += 20; 1504 return ret; 1505 } 1506 1507 static inline u32 nfsd4_link_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_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1514 { 1515 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1516 * sizeof(__be32); 1517 } 1518 1519 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1520 { 1521 return (op_encode_hdr_size + op_encode_stateid_maxsz 1522 + op_encode_change_info_maxsz + 1 1523 + nfs4_fattr_bitmap_maxsz 1524 + op_encode_delegation_maxsz) * sizeof(__be32); 1525 } 1526 1527 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1528 { 1529 u32 maxcount = 0, rlen = 0; 1530 1531 maxcount = svc_max_payload(rqstp); 1532 rlen = op->u.read.rd_length; 1533 1534 if (rlen > maxcount) 1535 rlen = maxcount; 1536 1537 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1538 } 1539 1540 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1541 { 1542 u32 maxcount = svc_max_payload(rqstp); 1543 u32 rlen = op->u.readdir.rd_maxcount; 1544 1545 if (rlen > maxcount) 1546 rlen = maxcount; 1547 1548 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1549 XDR_QUADLEN(rlen)) * sizeof(__be32); 1550 } 1551 1552 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1553 { 1554 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1555 * sizeof(__be32); 1556 } 1557 1558 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1559 { 1560 return (op_encode_hdr_size + op_encode_change_info_maxsz 1561 + op_encode_change_info_maxsz) * sizeof(__be32); 1562 } 1563 1564 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1565 struct nfsd4_op *op) 1566 { 1567 return NFS4_MAX_SESSIONID_LEN + 20; 1568 } 1569 1570 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1571 { 1572 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1573 } 1574 1575 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1576 { 1577 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1578 sizeof(__be32); 1579 } 1580 1581 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1582 { 1583 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 1584 } 1585 1586 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1587 { 1588 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1589 1 + 1 + /* eir_flags, spr_how */\ 1590 4 + /* spo_must_enforce & _allow with bitmap */\ 1591 2 + /*eir_server_owner.so_minor_id */\ 1592 /* eir_server_owner.so_major_id<> */\ 1593 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1594 /* eir_server_scope<> */\ 1595 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1596 1 + /* eir_server_impl_id array length */\ 1597 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1598 } 1599 1600 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1601 { 1602 return (op_encode_hdr_size + \ 1603 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1604 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1605 } 1606 1607 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1608 { 1609 return (op_encode_hdr_size + \ 1610 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1611 2 + /* csr_sequence, csr_flags */\ 1612 op_encode_channel_attrs_maxsz + \ 1613 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1614 } 1615 1616 static struct nfsd4_operation nfsd4_ops[] = { 1617 [OP_ACCESS] = { 1618 .op_func = (nfsd4op_func)nfsd4_access, 1619 .op_name = "OP_ACCESS", 1620 }, 1621 [OP_CLOSE] = { 1622 .op_func = (nfsd4op_func)nfsd4_close, 1623 .op_flags = OP_MODIFIES_SOMETHING, 1624 .op_name = "OP_CLOSE", 1625 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1626 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 1627 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 1628 }, 1629 [OP_COMMIT] = { 1630 .op_func = (nfsd4op_func)nfsd4_commit, 1631 .op_flags = OP_MODIFIES_SOMETHING, 1632 .op_name = "OP_COMMIT", 1633 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 1634 }, 1635 [OP_CREATE] = { 1636 .op_func = (nfsd4op_func)nfsd4_create, 1637 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 1638 .op_name = "OP_CREATE", 1639 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 1640 }, 1641 [OP_DELEGRETURN] = { 1642 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1643 .op_flags = OP_MODIFIES_SOMETHING, 1644 .op_name = "OP_DELEGRETURN", 1645 .op_rsize_bop = nfsd4_only_status_rsize, 1646 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 1647 }, 1648 [OP_GETATTR] = { 1649 .op_func = (nfsd4op_func)nfsd4_getattr, 1650 .op_flags = ALLOWED_ON_ABSENT_FS, 1651 .op_rsize_bop = nfsd4_getattr_rsize, 1652 .op_name = "OP_GETATTR", 1653 }, 1654 [OP_GETFH] = { 1655 .op_func = (nfsd4op_func)nfsd4_getfh, 1656 .op_name = "OP_GETFH", 1657 }, 1658 [OP_LINK] = { 1659 .op_func = (nfsd4op_func)nfsd4_link, 1660 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 1661 | OP_CACHEME, 1662 .op_name = "OP_LINK", 1663 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 1664 }, 1665 [OP_LOCK] = { 1666 .op_func = (nfsd4op_func)nfsd4_lock, 1667 .op_flags = OP_MODIFIES_SOMETHING, 1668 .op_name = "OP_LOCK", 1669 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 1670 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 1671 }, 1672 [OP_LOCKT] = { 1673 .op_func = (nfsd4op_func)nfsd4_lockt, 1674 .op_name = "OP_LOCKT", 1675 }, 1676 [OP_LOCKU] = { 1677 .op_func = (nfsd4op_func)nfsd4_locku, 1678 .op_flags = OP_MODIFIES_SOMETHING, 1679 .op_name = "OP_LOCKU", 1680 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1681 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 1682 }, 1683 [OP_LOOKUP] = { 1684 .op_func = (nfsd4op_func)nfsd4_lookup, 1685 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1686 .op_name = "OP_LOOKUP", 1687 }, 1688 [OP_LOOKUPP] = { 1689 .op_func = (nfsd4op_func)nfsd4_lookupp, 1690 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1691 .op_name = "OP_LOOKUPP", 1692 }, 1693 [OP_NVERIFY] = { 1694 .op_func = (nfsd4op_func)nfsd4_nverify, 1695 .op_name = "OP_NVERIFY", 1696 }, 1697 [OP_OPEN] = { 1698 .op_func = (nfsd4op_func)nfsd4_open, 1699 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1700 .op_name = "OP_OPEN", 1701 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 1702 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 1703 }, 1704 [OP_OPEN_CONFIRM] = { 1705 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1706 .op_flags = OP_MODIFIES_SOMETHING, 1707 .op_name = "OP_OPEN_CONFIRM", 1708 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1709 }, 1710 [OP_OPEN_DOWNGRADE] = { 1711 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1712 .op_flags = OP_MODIFIES_SOMETHING, 1713 .op_name = "OP_OPEN_DOWNGRADE", 1714 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1715 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 1716 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 1717 }, 1718 [OP_PUTFH] = { 1719 .op_func = (nfsd4op_func)nfsd4_putfh, 1720 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1721 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 1722 .op_name = "OP_PUTFH", 1723 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1724 }, 1725 [OP_PUTPUBFH] = { 1726 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1727 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1728 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 1729 .op_name = "OP_PUTPUBFH", 1730 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1731 }, 1732 [OP_PUTROOTFH] = { 1733 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1734 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1735 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 1736 .op_name = "OP_PUTROOTFH", 1737 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1738 }, 1739 [OP_READ] = { 1740 .op_func = (nfsd4op_func)nfsd4_read, 1741 .op_name = "OP_READ", 1742 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 1743 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 1744 }, 1745 [OP_READDIR] = { 1746 .op_func = (nfsd4op_func)nfsd4_readdir, 1747 .op_name = "OP_READDIR", 1748 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 1749 }, 1750 [OP_READLINK] = { 1751 .op_func = (nfsd4op_func)nfsd4_readlink, 1752 .op_name = "OP_READLINK", 1753 }, 1754 [OP_REMOVE] = { 1755 .op_func = (nfsd4op_func)nfsd4_remove, 1756 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1757 .op_name = "OP_REMOVE", 1758 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 1759 }, 1760 [OP_RENAME] = { 1761 .op_func = (nfsd4op_func)nfsd4_rename, 1762 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1763 .op_name = "OP_RENAME", 1764 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 1765 }, 1766 [OP_RENEW] = { 1767 .op_func = (nfsd4op_func)nfsd4_renew, 1768 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1769 | OP_MODIFIES_SOMETHING, 1770 .op_name = "OP_RENEW", 1771 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1772 1773 }, 1774 [OP_RESTOREFH] = { 1775 .op_func = (nfsd4op_func)nfsd4_restorefh, 1776 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1777 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 1778 .op_name = "OP_RESTOREFH", 1779 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1780 }, 1781 [OP_SAVEFH] = { 1782 .op_func = (nfsd4op_func)nfsd4_savefh, 1783 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1784 .op_name = "OP_SAVEFH", 1785 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1786 }, 1787 [OP_SECINFO] = { 1788 .op_func = (nfsd4op_func)nfsd4_secinfo, 1789 .op_flags = OP_HANDLES_WRONGSEC, 1790 .op_name = "OP_SECINFO", 1791 }, 1792 [OP_SETATTR] = { 1793 .op_func = (nfsd4op_func)nfsd4_setattr, 1794 .op_name = "OP_SETATTR", 1795 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1796 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 1797 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 1798 }, 1799 [OP_SETCLIENTID] = { 1800 .op_func = (nfsd4op_func)nfsd4_setclientid, 1801 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1802 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1803 .op_name = "OP_SETCLIENTID", 1804 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 1805 }, 1806 [OP_SETCLIENTID_CONFIRM] = { 1807 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1808 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1809 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1810 .op_name = "OP_SETCLIENTID_CONFIRM", 1811 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1812 }, 1813 [OP_VERIFY] = { 1814 .op_func = (nfsd4op_func)nfsd4_verify, 1815 .op_name = "OP_VERIFY", 1816 }, 1817 [OP_WRITE] = { 1818 .op_func = (nfsd4op_func)nfsd4_write, 1819 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1820 .op_name = "OP_WRITE", 1821 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 1822 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 1823 }, 1824 [OP_RELEASE_LOCKOWNER] = { 1825 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1826 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1827 | OP_MODIFIES_SOMETHING, 1828 .op_name = "OP_RELEASE_LOCKOWNER", 1829 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1830 }, 1831 1832 /* NFSv4.1 operations */ 1833 [OP_EXCHANGE_ID] = { 1834 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1835 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1836 | OP_MODIFIES_SOMETHING, 1837 .op_name = "OP_EXCHANGE_ID", 1838 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 1839 }, 1840 [OP_BACKCHANNEL_CTL] = { 1841 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 1842 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1843 .op_name = "OP_BACKCHANNEL_CTL", 1844 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1845 }, 1846 [OP_BIND_CONN_TO_SESSION] = { 1847 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 1848 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1849 | OP_MODIFIES_SOMETHING, 1850 .op_name = "OP_BIND_CONN_TO_SESSION", 1851 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 1852 }, 1853 [OP_CREATE_SESSION] = { 1854 .op_func = (nfsd4op_func)nfsd4_create_session, 1855 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1856 | OP_MODIFIES_SOMETHING, 1857 .op_name = "OP_CREATE_SESSION", 1858 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 1859 }, 1860 [OP_DESTROY_SESSION] = { 1861 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1862 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1863 | OP_MODIFIES_SOMETHING, 1864 .op_name = "OP_DESTROY_SESSION", 1865 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1866 }, 1867 [OP_SEQUENCE] = { 1868 .op_func = (nfsd4op_func)nfsd4_sequence, 1869 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1870 .op_name = "OP_SEQUENCE", 1871 }, 1872 [OP_DESTROY_CLIENTID] = { 1873 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 1874 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1875 | OP_MODIFIES_SOMETHING, 1876 .op_name = "OP_DESTROY_CLIENTID", 1877 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1878 }, 1879 [OP_RECLAIM_COMPLETE] = { 1880 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 1881 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1882 .op_name = "OP_RECLAIM_COMPLETE", 1883 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1884 }, 1885 [OP_SECINFO_NO_NAME] = { 1886 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 1887 .op_flags = OP_HANDLES_WRONGSEC, 1888 .op_name = "OP_SECINFO_NO_NAME", 1889 }, 1890 [OP_TEST_STATEID] = { 1891 .op_func = (nfsd4op_func)nfsd4_test_stateid, 1892 .op_flags = ALLOWED_WITHOUT_FH, 1893 .op_name = "OP_TEST_STATEID", 1894 }, 1895 [OP_FREE_STATEID] = { 1896 .op_func = (nfsd4op_func)nfsd4_free_stateid, 1897 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1898 .op_name = "OP_FREE_STATEID", 1899 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 1900 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1901 }, 1902 }; 1903 1904 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 1905 { 1906 struct nfsd4_operation *opdesc; 1907 nfsd4op_rsize estimator; 1908 1909 if (op->opnum == OP_ILLEGAL) 1910 return op_encode_hdr_size * sizeof(__be32); 1911 opdesc = OPDESC(op); 1912 estimator = opdesc->op_rsize_bop; 1913 return estimator ? estimator(rqstp, op) : PAGE_SIZE; 1914 } 1915 1916 void warn_on_nonidempotent_op(struct nfsd4_op *op) 1917 { 1918 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 1919 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 1920 op->opnum, nfsd4_op_name(op->opnum)); 1921 WARN_ON_ONCE(1); 1922 } 1923 } 1924 1925 static const char *nfsd4_op_name(unsigned opnum) 1926 { 1927 if (opnum < ARRAY_SIZE(nfsd4_ops)) 1928 return nfsd4_ops[opnum].op_name; 1929 return "unknown_operation"; 1930 } 1931 1932 #define nfsd4_voidres nfsd4_voidargs 1933 struct nfsd4_voidargs { int dummy; }; 1934 1935 static struct svc_procedure nfsd_procedures4[2] = { 1936 [NFSPROC4_NULL] = { 1937 .pc_func = (svc_procfunc) nfsd4_proc_null, 1938 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 1939 .pc_argsize = sizeof(struct nfsd4_voidargs), 1940 .pc_ressize = sizeof(struct nfsd4_voidres), 1941 .pc_cachetype = RC_NOCACHE, 1942 .pc_xdrressize = 1, 1943 }, 1944 [NFSPROC4_COMPOUND] = { 1945 .pc_func = (svc_procfunc) nfsd4_proc_compound, 1946 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 1947 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 1948 .pc_argsize = sizeof(struct nfsd4_compoundargs), 1949 .pc_ressize = sizeof(struct nfsd4_compoundres), 1950 .pc_release = nfsd4_release_compoundargs, 1951 .pc_cachetype = RC_NOCACHE, 1952 .pc_xdrressize = NFSD_BUFSIZE/4, 1953 }, 1954 }; 1955 1956 struct svc_version nfsd_version4 = { 1957 .vs_vers = 4, 1958 .vs_nproc = 2, 1959 .vs_proc = nfsd_procedures4, 1960 .vs_dispatch = nfsd_dispatch, 1961 .vs_xdrsize = NFS4_SVC_XDRSIZE, 1962 .vs_rpcb_optnl = 1, 1963 }; 1964 1965 /* 1966 * Local variables: 1967 * c-basic-offset: 8 1968 * End: 1969 */ 1970