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 status = nfsd_symlink(rqstp, &cstate->current_fh, 621 create->cr_name, create->cr_namelen, 622 create->cr_linkname, create->cr_linklen, 623 &resfh, &create->cr_iattr); 624 break; 625 626 case NF4BLK: 627 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 628 if (MAJOR(rdev) != create->cr_specdata1 || 629 MINOR(rdev) != create->cr_specdata2) 630 return nfserr_inval; 631 status = nfsd_create(rqstp, &cstate->current_fh, 632 create->cr_name, create->cr_namelen, 633 &create->cr_iattr, S_IFBLK, rdev, &resfh); 634 break; 635 636 case NF4CHR: 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_IFCHR, rdev, &resfh); 644 break; 645 646 case NF4SOCK: 647 status = nfsd_create(rqstp, &cstate->current_fh, 648 create->cr_name, create->cr_namelen, 649 &create->cr_iattr, S_IFSOCK, 0, &resfh); 650 break; 651 652 case NF4FIFO: 653 status = nfsd_create(rqstp, &cstate->current_fh, 654 create->cr_name, create->cr_namelen, 655 &create->cr_iattr, S_IFIFO, 0, &resfh); 656 break; 657 658 case NF4DIR: 659 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 660 status = nfsd_create(rqstp, &cstate->current_fh, 661 create->cr_name, create->cr_namelen, 662 &create->cr_iattr, S_IFDIR, 0, &resfh); 663 break; 664 665 default: 666 status = nfserr_badtype; 667 } 668 669 if (status) 670 goto out; 671 672 if (create->cr_label.len) 673 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 674 675 if (create->cr_acl != NULL) 676 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 677 create->cr_bmval); 678 679 fh_unlock(&cstate->current_fh); 680 set_change_info(&create->cr_cinfo, &cstate->current_fh); 681 fh_dup2(&cstate->current_fh, &resfh); 682 out: 683 fh_put(&resfh); 684 return status; 685 } 686 687 static __be32 688 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 689 struct nfsd4_getattr *getattr) 690 { 691 __be32 status; 692 693 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 694 if (status) 695 return status; 696 697 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 698 return nfserr_inval; 699 700 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 701 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 702 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 703 704 getattr->ga_fhp = &cstate->current_fh; 705 return nfs_ok; 706 } 707 708 static __be32 709 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 710 struct nfsd4_link *link) 711 { 712 __be32 status = nfserr_nofilehandle; 713 714 if (!cstate->save_fh.fh_dentry) 715 return status; 716 status = nfsd_link(rqstp, &cstate->current_fh, 717 link->li_name, link->li_namelen, &cstate->save_fh); 718 if (!status) 719 set_change_info(&link->li_cinfo, &cstate->current_fh); 720 return status; 721 } 722 723 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 724 { 725 struct svc_fh tmp_fh; 726 __be32 ret; 727 728 fh_init(&tmp_fh, NFS4_FHSIZE); 729 ret = exp_pseudoroot(rqstp, &tmp_fh); 730 if (ret) 731 return ret; 732 if (tmp_fh.fh_dentry == fh->fh_dentry) { 733 fh_put(&tmp_fh); 734 return nfserr_noent; 735 } 736 fh_put(&tmp_fh); 737 return nfsd_lookup(rqstp, fh, "..", 2, fh); 738 } 739 740 static __be32 741 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 742 void *arg) 743 { 744 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 745 } 746 747 static __be32 748 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 749 struct nfsd4_lookup *lookup) 750 { 751 return nfsd_lookup(rqstp, &cstate->current_fh, 752 lookup->lo_name, lookup->lo_len, 753 &cstate->current_fh); 754 } 755 756 static __be32 757 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 758 struct nfsd4_read *read) 759 { 760 __be32 status; 761 762 /* no need to check permission - this will be done in nfsd_read() */ 763 764 read->rd_filp = NULL; 765 if (read->rd_offset >= OFFSET_MAX) 766 return nfserr_inval; 767 768 /* 769 * If we do a zero copy read, then a client will see read data 770 * that reflects the state of the file *after* performing the 771 * following compound. 772 * 773 * To ensure proper ordering, we therefore turn off zero copy if 774 * the client wants us to do more in this compound: 775 */ 776 if (!nfsd4_last_compound_op(rqstp)) 777 rqstp->rq_splice_ok = false; 778 779 /* check stateid */ 780 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 781 cstate, &read->rd_stateid, 782 RD_STATE, &read->rd_filp))) { 783 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 784 goto out; 785 } 786 status = nfs_ok; 787 out: 788 read->rd_rqstp = rqstp; 789 read->rd_fhp = &cstate->current_fh; 790 return status; 791 } 792 793 static __be32 794 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 795 struct nfsd4_readdir *readdir) 796 { 797 u64 cookie = readdir->rd_cookie; 798 static const nfs4_verifier zeroverf; 799 800 /* no need to check permission - this will be done in nfsd_readdir() */ 801 802 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 803 return nfserr_inval; 804 805 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 806 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 807 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 808 809 if ((cookie == 1) || (cookie == 2) || 810 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 811 return nfserr_bad_cookie; 812 813 readdir->rd_rqstp = rqstp; 814 readdir->rd_fhp = &cstate->current_fh; 815 return nfs_ok; 816 } 817 818 static __be32 819 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 820 struct nfsd4_readlink *readlink) 821 { 822 readlink->rl_rqstp = rqstp; 823 readlink->rl_fhp = &cstate->current_fh; 824 return nfs_ok; 825 } 826 827 static __be32 828 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 829 struct nfsd4_remove *remove) 830 { 831 __be32 status; 832 833 if (locks_in_grace(SVC_NET(rqstp))) 834 return nfserr_grace; 835 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 836 remove->rm_name, remove->rm_namelen); 837 if (!status) { 838 fh_unlock(&cstate->current_fh); 839 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 840 } 841 return status; 842 } 843 844 static __be32 845 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 846 struct nfsd4_rename *rename) 847 { 848 __be32 status = nfserr_nofilehandle; 849 850 if (!cstate->save_fh.fh_dentry) 851 return status; 852 if (locks_in_grace(SVC_NET(rqstp)) && 853 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 854 return nfserr_grace; 855 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 856 rename->rn_snamelen, &cstate->current_fh, 857 rename->rn_tname, rename->rn_tnamelen); 858 if (status) 859 return status; 860 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 861 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 862 return nfs_ok; 863 } 864 865 static __be32 866 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 867 struct nfsd4_secinfo *secinfo) 868 { 869 struct svc_fh resfh; 870 struct svc_export *exp; 871 struct dentry *dentry; 872 __be32 err; 873 874 fh_init(&resfh, NFS4_FHSIZE); 875 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 876 if (err) 877 return err; 878 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 879 secinfo->si_name, secinfo->si_namelen, 880 &exp, &dentry); 881 if (err) 882 return err; 883 if (dentry->d_inode == NULL) { 884 exp_put(exp); 885 err = nfserr_noent; 886 } else 887 secinfo->si_exp = exp; 888 dput(dentry); 889 if (cstate->minorversion) 890 /* See rfc 5661 section 2.6.3.1.1.8 */ 891 fh_put(&cstate->current_fh); 892 return err; 893 } 894 895 static __be32 896 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 897 struct nfsd4_secinfo_no_name *sin) 898 { 899 __be32 err; 900 901 switch (sin->sin_style) { 902 case NFS4_SECINFO_STYLE4_CURRENT_FH: 903 break; 904 case NFS4_SECINFO_STYLE4_PARENT: 905 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 906 if (err) 907 return err; 908 break; 909 default: 910 return nfserr_inval; 911 } 912 exp_get(cstate->current_fh.fh_export); 913 sin->sin_exp = cstate->current_fh.fh_export; 914 fh_put(&cstate->current_fh); 915 return nfs_ok; 916 } 917 918 static __be32 919 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 920 struct nfsd4_setattr *setattr) 921 { 922 __be32 status = nfs_ok; 923 int err; 924 925 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 926 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 927 &setattr->sa_stateid, WR_STATE, NULL); 928 if (status) { 929 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 930 return status; 931 } 932 } 933 err = fh_want_write(&cstate->current_fh); 934 if (err) 935 return nfserrno(err); 936 status = nfs_ok; 937 938 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 939 nfsd_attrmask); 940 if (status) 941 goto out; 942 943 if (setattr->sa_acl != NULL) 944 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 945 setattr->sa_acl); 946 if (status) 947 goto out; 948 if (setattr->sa_label.len) 949 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 950 &setattr->sa_label); 951 if (status) 952 goto out; 953 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 954 0, (time_t)0); 955 out: 956 fh_drop_write(&cstate->current_fh); 957 return status; 958 } 959 960 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 961 { 962 int i = 1; 963 int buflen = write->wr_buflen; 964 965 vec[0].iov_base = write->wr_head.iov_base; 966 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 967 buflen -= vec[0].iov_len; 968 969 while (buflen) { 970 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 971 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 972 buflen -= vec[i].iov_len; 973 i++; 974 } 975 return i; 976 } 977 978 static __be32 979 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 980 struct nfsd4_write *write) 981 { 982 stateid_t *stateid = &write->wr_stateid; 983 struct file *filp = NULL; 984 __be32 status = nfs_ok; 985 unsigned long cnt; 986 int nvecs; 987 988 /* no need to check permission - this will be done in nfsd_write() */ 989 990 if (write->wr_offset >= OFFSET_MAX) 991 return nfserr_inval; 992 993 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 994 cstate, stateid, WR_STATE, &filp); 995 if (status) { 996 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 997 return status; 998 } 999 1000 cnt = write->wr_buflen; 1001 write->wr_how_written = write->wr_stable_how; 1002 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 1003 1004 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1005 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1006 1007 status = nfsd_write(rqstp, &cstate->current_fh, filp, 1008 write->wr_offset, rqstp->rq_vec, nvecs, 1009 &cnt, &write->wr_how_written); 1010 if (filp) 1011 fput(filp); 1012 1013 write->wr_bytes_written = cnt; 1014 1015 return status; 1016 } 1017 1018 /* This routine never returns NFS_OK! If there are no other errors, it 1019 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1020 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1021 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1022 */ 1023 static __be32 1024 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1025 struct nfsd4_verify *verify) 1026 { 1027 __be32 *buf, *p; 1028 int count; 1029 __be32 status; 1030 1031 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1032 if (status) 1033 return status; 1034 1035 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1036 if (status) 1037 return status; 1038 1039 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1040 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1041 return nfserr_inval; 1042 if (verify->ve_attrlen & 3) 1043 return nfserr_inval; 1044 1045 /* count in words: 1046 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1047 */ 1048 count = 4 + (verify->ve_attrlen >> 2); 1049 buf = kmalloc(count << 2, GFP_KERNEL); 1050 if (!buf) 1051 return nfserr_jukebox; 1052 1053 p = buf; 1054 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1055 cstate->current_fh.fh_export, 1056 cstate->current_fh.fh_dentry, 1057 verify->ve_bmval, 1058 rqstp, 0); 1059 /* 1060 * If nfsd4_encode_fattr() ran out of space, assume that's because 1061 * the attributes are longer (hence different) than those given: 1062 */ 1063 if (status == nfserr_resource) 1064 status = nfserr_not_same; 1065 if (status) 1066 goto out_kfree; 1067 1068 /* skip bitmap */ 1069 p = buf + 1 + ntohl(buf[0]); 1070 status = nfserr_not_same; 1071 if (ntohl(*p++) != verify->ve_attrlen) 1072 goto out_kfree; 1073 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1074 status = nfserr_same; 1075 1076 out_kfree: 1077 kfree(buf); 1078 return status; 1079 } 1080 1081 static __be32 1082 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1083 struct nfsd4_verify *verify) 1084 { 1085 __be32 status; 1086 1087 status = _nfsd4_verify(rqstp, cstate, verify); 1088 return status == nfserr_not_same ? nfs_ok : status; 1089 } 1090 1091 static __be32 1092 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1093 struct nfsd4_verify *verify) 1094 { 1095 __be32 status; 1096 1097 status = _nfsd4_verify(rqstp, cstate, verify); 1098 return status == nfserr_same ? nfs_ok : status; 1099 } 1100 1101 /* 1102 * NULL call. 1103 */ 1104 static __be32 1105 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1106 { 1107 return nfs_ok; 1108 } 1109 1110 static inline void nfsd4_increment_op_stats(u32 opnum) 1111 { 1112 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1113 nfsdstats.nfs4_opcount[opnum]++; 1114 } 1115 1116 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1117 void *); 1118 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1119 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1120 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1121 1122 enum nfsd4_op_flags { 1123 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1124 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1125 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1126 /* For rfc 5661 section 2.6.3.1.1: */ 1127 OP_HANDLES_WRONGSEC = 1 << 3, 1128 OP_IS_PUTFH_LIKE = 1 << 4, 1129 /* 1130 * These are the ops whose result size we estimate before 1131 * encoding, to avoid performing an op then not being able to 1132 * respond or cache a response. This includes writes and setattrs 1133 * as well as the operations usually called "nonidempotent": 1134 */ 1135 OP_MODIFIES_SOMETHING = 1 << 5, 1136 /* 1137 * Cache compounds containing these ops in the xid-based drc: 1138 * We use the DRC for compounds containing non-idempotent 1139 * operations, *except* those that are 4.1-specific (since 1140 * sessions provide their own EOS), and except for stateful 1141 * operations other than setclientid and setclientid_confirm 1142 * (since sequence numbers provide EOS for open, lock, etc in 1143 * the v4.0 case). 1144 */ 1145 OP_CACHEME = 1 << 6, 1146 /* 1147 * These are ops which clear current state id. 1148 */ 1149 OP_CLEAR_STATEID = 1 << 7, 1150 }; 1151 1152 struct nfsd4_operation { 1153 nfsd4op_func op_func; 1154 u32 op_flags; 1155 char *op_name; 1156 /* Try to get response size before operation */ 1157 nfsd4op_rsize op_rsize_bop; 1158 stateid_getter op_get_currentstateid; 1159 stateid_setter op_set_currentstateid; 1160 }; 1161 1162 static struct nfsd4_operation nfsd4_ops[]; 1163 1164 static const char *nfsd4_op_name(unsigned opnum); 1165 1166 /* 1167 * Enforce NFSv4.1 COMPOUND ordering rules: 1168 * 1169 * Also note, enforced elsewhere: 1170 * - SEQUENCE other than as first op results in 1171 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1172 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1173 * (Enforced in nfsd4_bind_conn_to_session().) 1174 * - DESTROY_SESSION must be the final operation in a compound, if 1175 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1176 * (Enforced in nfsd4_destroy_session().) 1177 */ 1178 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1179 { 1180 struct nfsd4_op *op = &args->ops[0]; 1181 1182 /* These ordering requirements don't apply to NFSv4.0: */ 1183 if (args->minorversion == 0) 1184 return nfs_ok; 1185 /* This is weird, but OK, not our problem: */ 1186 if (args->opcnt == 0) 1187 return nfs_ok; 1188 if (op->status == nfserr_op_illegal) 1189 return nfs_ok; 1190 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1191 return nfserr_op_not_in_session; 1192 if (op->opnum == OP_SEQUENCE) 1193 return nfs_ok; 1194 if (args->opcnt != 1) 1195 return nfserr_not_only_op; 1196 return nfs_ok; 1197 } 1198 1199 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1200 { 1201 return &nfsd4_ops[op->opnum]; 1202 } 1203 1204 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1205 { 1206 if (op->opnum == OP_ILLEGAL) 1207 return false; 1208 return OPDESC(op)->op_flags & OP_CACHEME; 1209 } 1210 1211 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1212 { 1213 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1214 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1215 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1216 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1217 struct nfsd4_operation *thisd; 1218 struct nfsd4_operation *nextd; 1219 1220 thisd = OPDESC(this); 1221 /* 1222 * Most ops check wronsec on our own; only the putfh-like ops 1223 * have special rules. 1224 */ 1225 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1226 return false; 1227 /* 1228 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1229 * put-filehandle operation if we're not going to use the 1230 * result: 1231 */ 1232 if (argp->opcnt == resp->opcnt) 1233 return false; 1234 1235 nextd = OPDESC(next); 1236 /* 1237 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1238 * errors themselves as necessary; others should check for them 1239 * now: 1240 */ 1241 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1242 } 1243 1244 static void svcxdr_init_encode(struct svc_rqst *rqstp, 1245 struct nfsd4_compoundres *resp) 1246 { 1247 struct xdr_stream *xdr = &resp->xdr; 1248 struct xdr_buf *buf = &rqstp->rq_res; 1249 struct kvec *head = buf->head; 1250 1251 xdr->buf = buf; 1252 xdr->iov = head; 1253 xdr->p = head->iov_base + head->iov_len; 1254 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1255 /* Tail and page_len should be zero at this point: */ 1256 buf->len = buf->head[0].iov_len; 1257 xdr->scratch.iov_len = 0; 1258 xdr->page_ptr = buf->pages - 1; 1259 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1260 - rqstp->rq_auth_slack; 1261 } 1262 1263 /* 1264 * COMPOUND call. 1265 */ 1266 static __be32 1267 nfsd4_proc_compound(struct svc_rqst *rqstp, 1268 struct nfsd4_compoundargs *args, 1269 struct nfsd4_compoundres *resp) 1270 { 1271 struct nfsd4_op *op; 1272 struct nfsd4_operation *opdesc; 1273 struct nfsd4_compound_state *cstate = &resp->cstate; 1274 struct svc_fh *current_fh = &cstate->current_fh; 1275 struct svc_fh *save_fh = &cstate->save_fh; 1276 __be32 status; 1277 1278 svcxdr_init_encode(rqstp, resp); 1279 resp->tagp = resp->xdr.p; 1280 /* reserve space for: taglen, tag, and opcnt */ 1281 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1282 resp->taglen = args->taglen; 1283 resp->tag = args->tag; 1284 resp->rqstp = rqstp; 1285 cstate->minorversion = args->minorversion; 1286 fh_init(current_fh, NFS4_FHSIZE); 1287 fh_init(save_fh, NFS4_FHSIZE); 1288 /* 1289 * Don't use the deferral mechanism for NFSv4; compounds make it 1290 * too hard to avoid non-idempotency problems. 1291 */ 1292 rqstp->rq_usedeferral = 0; 1293 1294 /* 1295 * According to RFC3010, this takes precedence over all other errors. 1296 */ 1297 status = nfserr_minor_vers_mismatch; 1298 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1299 goto out; 1300 1301 status = nfs41_check_op_ordering(args); 1302 if (status) { 1303 op = &args->ops[0]; 1304 op->status = status; 1305 goto encode_op; 1306 } 1307 1308 while (!status && resp->opcnt < args->opcnt) { 1309 op = &args->ops[resp->opcnt++]; 1310 1311 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1312 resp->opcnt, args->opcnt, op->opnum, 1313 nfsd4_op_name(op->opnum)); 1314 /* 1315 * The XDR decode routines may have pre-set op->status; 1316 * for example, if there is a miscellaneous XDR error 1317 * it will be set to nfserr_bad_xdr. 1318 */ 1319 if (op->status) { 1320 if (op->opnum == OP_OPEN) 1321 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1322 goto encode_op; 1323 } 1324 1325 opdesc = OPDESC(op); 1326 1327 if (!current_fh->fh_dentry) { 1328 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1329 op->status = nfserr_nofilehandle; 1330 goto encode_op; 1331 } 1332 } else if (current_fh->fh_export->ex_fslocs.migrated && 1333 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1334 op->status = nfserr_moved; 1335 goto encode_op; 1336 } 1337 1338 fh_clear_wcc(current_fh); 1339 1340 /* If op is non-idempotent */ 1341 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1342 /* 1343 * Don't execute this op if we couldn't encode a 1344 * succesful reply: 1345 */ 1346 u32 plen = opdesc->op_rsize_bop(rqstp, op); 1347 /* 1348 * Plus if there's another operation, make sure 1349 * we'll have space to at least encode an error: 1350 */ 1351 if (resp->opcnt < args->opcnt) 1352 plen += COMPOUND_ERR_SLACK_SPACE; 1353 op->status = nfsd4_check_resp_size(resp, plen); 1354 } 1355 1356 if (op->status) 1357 goto encode_op; 1358 1359 if (opdesc->op_get_currentstateid) 1360 opdesc->op_get_currentstateid(cstate, &op->u); 1361 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1362 1363 if (!op->status) { 1364 if (opdesc->op_set_currentstateid) 1365 opdesc->op_set_currentstateid(cstate, &op->u); 1366 1367 if (opdesc->op_flags & OP_CLEAR_STATEID) 1368 clear_current_stateid(cstate); 1369 1370 if (need_wrongsec_check(rqstp)) 1371 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 1372 } 1373 1374 encode_op: 1375 /* Only from SEQUENCE */ 1376 if (cstate->status == nfserr_replay_cache) { 1377 dprintk("%s NFS4.1 replay from cache\n", __func__); 1378 status = op->status; 1379 goto out; 1380 } 1381 if (op->status == nfserr_replay_me) { 1382 op->replay = &cstate->replay_owner->so_replay; 1383 nfsd4_encode_replay(&resp->xdr, op); 1384 status = op->status = op->replay->rp_status; 1385 } else { 1386 nfsd4_encode_operation(resp, op); 1387 status = op->status; 1388 } 1389 1390 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1391 args->ops, args->opcnt, resp->opcnt, op->opnum, 1392 be32_to_cpu(status)); 1393 1394 if (cstate->replay_owner) { 1395 nfs4_unlock_state(); 1396 cstate->replay_owner = NULL; 1397 } 1398 /* XXX Ugh, we need to get rid of this kind of special case: */ 1399 if (op->opnum == OP_READ && op->u.read.rd_filp) 1400 fput(op->u.read.rd_filp); 1401 1402 nfsd4_increment_op_stats(op->opnum); 1403 } 1404 1405 cstate->status = status; 1406 fh_put(current_fh); 1407 fh_put(save_fh); 1408 BUG_ON(cstate->replay_owner); 1409 out: 1410 /* Reset deferral mechanism for RPC deferrals */ 1411 rqstp->rq_usedeferral = 1; 1412 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1413 return status; 1414 } 1415 1416 #define op_encode_hdr_size (2) 1417 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1418 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1419 #define op_encode_change_info_maxsz (5) 1420 #define nfs4_fattr_bitmap_maxsz (4) 1421 1422 /* We'll fall back on returning no lockowner if run out of space: */ 1423 #define op_encode_lockowner_maxsz (0) 1424 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1425 1426 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1427 1428 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1429 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1430 op_encode_ace_maxsz) 1431 1432 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1433 1434 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1435 { 1436 return (op_encode_hdr_size) * sizeof(__be32); 1437 } 1438 1439 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1440 { 1441 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1442 } 1443 1444 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1445 { 1446 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1447 } 1448 1449 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1450 { 1451 return (op_encode_hdr_size + op_encode_change_info_maxsz 1452 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1453 } 1454 1455 /* 1456 * Note since this is an idempotent operation we won't insist on failing 1457 * the op prematurely if the estimate is too large. We may turn off splice 1458 * reads unnecessarily. 1459 */ 1460 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1461 struct nfsd4_op *op) 1462 { 1463 u32 *bmap = op->u.getattr.ga_bmval; 1464 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1465 u32 ret = 0; 1466 1467 if (bmap0 & FATTR4_WORD0_ACL) 1468 return svc_max_payload(rqstp); 1469 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1470 return svc_max_payload(rqstp); 1471 1472 if (bmap1 & FATTR4_WORD1_OWNER) { 1473 ret += IDMAP_NAMESZ + 4; 1474 bmap1 &= ~FATTR4_WORD1_OWNER; 1475 } 1476 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1477 ret += IDMAP_NAMESZ + 4; 1478 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1479 } 1480 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1481 ret += NFS4_FHSIZE + 4; 1482 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1483 } 1484 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1485 ret += NFSD4_MAX_SEC_LABEL_LEN + 12; 1486 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1487 } 1488 /* 1489 * Largest of remaining attributes are 16 bytes (e.g., 1490 * supported_attributes) 1491 */ 1492 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1493 /* bitmask, length */ 1494 ret += 20; 1495 return ret; 1496 } 1497 1498 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1499 { 1500 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1501 * sizeof(__be32); 1502 } 1503 1504 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1505 { 1506 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1507 * sizeof(__be32); 1508 } 1509 1510 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1511 { 1512 return (op_encode_hdr_size + op_encode_stateid_maxsz 1513 + op_encode_change_info_maxsz + 1 1514 + nfs4_fattr_bitmap_maxsz 1515 + op_encode_delegation_maxsz) * sizeof(__be32); 1516 } 1517 1518 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1519 { 1520 u32 maxcount = 0, rlen = 0; 1521 1522 maxcount = svc_max_payload(rqstp); 1523 rlen = op->u.read.rd_length; 1524 1525 if (rlen > maxcount) 1526 rlen = maxcount; 1527 1528 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1529 } 1530 1531 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1532 { 1533 u32 maxcount = svc_max_payload(rqstp); 1534 u32 rlen = op->u.readdir.rd_maxcount; 1535 1536 if (rlen > maxcount) 1537 rlen = maxcount; 1538 1539 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1540 XDR_QUADLEN(rlen)) * sizeof(__be32); 1541 } 1542 1543 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1544 { 1545 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1546 * sizeof(__be32); 1547 } 1548 1549 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1550 { 1551 return (op_encode_hdr_size + op_encode_change_info_maxsz 1552 + op_encode_change_info_maxsz) * sizeof(__be32); 1553 } 1554 1555 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1556 struct nfsd4_op *op) 1557 { 1558 return NFS4_MAX_SESSIONID_LEN + 20; 1559 } 1560 1561 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1562 { 1563 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1564 } 1565 1566 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1567 { 1568 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1569 sizeof(__be32); 1570 } 1571 1572 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1573 { 1574 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 1575 } 1576 1577 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1578 { 1579 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1580 1 + 1 + /* eir_flags, spr_how */\ 1581 4 + /* spo_must_enforce & _allow with bitmap */\ 1582 2 + /*eir_server_owner.so_minor_id */\ 1583 /* eir_server_owner.so_major_id<> */\ 1584 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1585 /* eir_server_scope<> */\ 1586 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1587 1 + /* eir_server_impl_id array length */\ 1588 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1589 } 1590 1591 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1592 { 1593 return (op_encode_hdr_size + \ 1594 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1595 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1596 } 1597 1598 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1599 { 1600 return (op_encode_hdr_size + \ 1601 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1602 2 + /* csr_sequence, csr_flags */\ 1603 op_encode_channel_attrs_maxsz + \ 1604 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1605 } 1606 1607 static struct nfsd4_operation nfsd4_ops[] = { 1608 [OP_ACCESS] = { 1609 .op_func = (nfsd4op_func)nfsd4_access, 1610 .op_name = "OP_ACCESS", 1611 }, 1612 [OP_CLOSE] = { 1613 .op_func = (nfsd4op_func)nfsd4_close, 1614 .op_flags = OP_MODIFIES_SOMETHING, 1615 .op_name = "OP_CLOSE", 1616 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1617 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 1618 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 1619 }, 1620 [OP_COMMIT] = { 1621 .op_func = (nfsd4op_func)nfsd4_commit, 1622 .op_flags = OP_MODIFIES_SOMETHING, 1623 .op_name = "OP_COMMIT", 1624 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 1625 }, 1626 [OP_CREATE] = { 1627 .op_func = (nfsd4op_func)nfsd4_create, 1628 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 1629 .op_name = "OP_CREATE", 1630 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 1631 }, 1632 [OP_DELEGRETURN] = { 1633 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1634 .op_flags = OP_MODIFIES_SOMETHING, 1635 .op_name = "OP_DELEGRETURN", 1636 .op_rsize_bop = nfsd4_only_status_rsize, 1637 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 1638 }, 1639 [OP_GETATTR] = { 1640 .op_func = (nfsd4op_func)nfsd4_getattr, 1641 .op_flags = ALLOWED_ON_ABSENT_FS, 1642 .op_rsize_bop = nfsd4_getattr_rsize, 1643 .op_name = "OP_GETATTR", 1644 }, 1645 [OP_GETFH] = { 1646 .op_func = (nfsd4op_func)nfsd4_getfh, 1647 .op_name = "OP_GETFH", 1648 }, 1649 [OP_LINK] = { 1650 .op_func = (nfsd4op_func)nfsd4_link, 1651 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 1652 | OP_CACHEME, 1653 .op_name = "OP_LINK", 1654 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 1655 }, 1656 [OP_LOCK] = { 1657 .op_func = (nfsd4op_func)nfsd4_lock, 1658 .op_flags = OP_MODIFIES_SOMETHING, 1659 .op_name = "OP_LOCK", 1660 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 1661 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 1662 }, 1663 [OP_LOCKT] = { 1664 .op_func = (nfsd4op_func)nfsd4_lockt, 1665 .op_name = "OP_LOCKT", 1666 }, 1667 [OP_LOCKU] = { 1668 .op_func = (nfsd4op_func)nfsd4_locku, 1669 .op_flags = OP_MODIFIES_SOMETHING, 1670 .op_name = "OP_LOCKU", 1671 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1672 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 1673 }, 1674 [OP_LOOKUP] = { 1675 .op_func = (nfsd4op_func)nfsd4_lookup, 1676 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1677 .op_name = "OP_LOOKUP", 1678 }, 1679 [OP_LOOKUPP] = { 1680 .op_func = (nfsd4op_func)nfsd4_lookupp, 1681 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1682 .op_name = "OP_LOOKUPP", 1683 }, 1684 [OP_NVERIFY] = { 1685 .op_func = (nfsd4op_func)nfsd4_nverify, 1686 .op_name = "OP_NVERIFY", 1687 }, 1688 [OP_OPEN] = { 1689 .op_func = (nfsd4op_func)nfsd4_open, 1690 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1691 .op_name = "OP_OPEN", 1692 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 1693 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 1694 }, 1695 [OP_OPEN_CONFIRM] = { 1696 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1697 .op_flags = OP_MODIFIES_SOMETHING, 1698 .op_name = "OP_OPEN_CONFIRM", 1699 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1700 }, 1701 [OP_OPEN_DOWNGRADE] = { 1702 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1703 .op_flags = OP_MODIFIES_SOMETHING, 1704 .op_name = "OP_OPEN_DOWNGRADE", 1705 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1706 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 1707 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 1708 }, 1709 [OP_PUTFH] = { 1710 .op_func = (nfsd4op_func)nfsd4_putfh, 1711 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1712 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 1713 .op_name = "OP_PUTFH", 1714 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1715 }, 1716 [OP_PUTPUBFH] = { 1717 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1718 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1719 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 1720 .op_name = "OP_PUTPUBFH", 1721 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1722 }, 1723 [OP_PUTROOTFH] = { 1724 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1725 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1726 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 1727 .op_name = "OP_PUTROOTFH", 1728 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1729 }, 1730 [OP_READ] = { 1731 .op_func = (nfsd4op_func)nfsd4_read, 1732 .op_name = "OP_READ", 1733 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 1734 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 1735 }, 1736 [OP_READDIR] = { 1737 .op_func = (nfsd4op_func)nfsd4_readdir, 1738 .op_name = "OP_READDIR", 1739 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 1740 }, 1741 [OP_READLINK] = { 1742 .op_func = (nfsd4op_func)nfsd4_readlink, 1743 .op_name = "OP_READLINK", 1744 }, 1745 [OP_REMOVE] = { 1746 .op_func = (nfsd4op_func)nfsd4_remove, 1747 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1748 .op_name = "OP_REMOVE", 1749 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 1750 }, 1751 [OP_RENAME] = { 1752 .op_func = (nfsd4op_func)nfsd4_rename, 1753 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1754 .op_name = "OP_RENAME", 1755 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 1756 }, 1757 [OP_RENEW] = { 1758 .op_func = (nfsd4op_func)nfsd4_renew, 1759 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1760 | OP_MODIFIES_SOMETHING, 1761 .op_name = "OP_RENEW", 1762 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1763 1764 }, 1765 [OP_RESTOREFH] = { 1766 .op_func = (nfsd4op_func)nfsd4_restorefh, 1767 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1768 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 1769 .op_name = "OP_RESTOREFH", 1770 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1771 }, 1772 [OP_SAVEFH] = { 1773 .op_func = (nfsd4op_func)nfsd4_savefh, 1774 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1775 .op_name = "OP_SAVEFH", 1776 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1777 }, 1778 [OP_SECINFO] = { 1779 .op_func = (nfsd4op_func)nfsd4_secinfo, 1780 .op_flags = OP_HANDLES_WRONGSEC, 1781 .op_name = "OP_SECINFO", 1782 }, 1783 [OP_SETATTR] = { 1784 .op_func = (nfsd4op_func)nfsd4_setattr, 1785 .op_name = "OP_SETATTR", 1786 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1787 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 1788 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 1789 }, 1790 [OP_SETCLIENTID] = { 1791 .op_func = (nfsd4op_func)nfsd4_setclientid, 1792 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1793 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1794 .op_name = "OP_SETCLIENTID", 1795 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 1796 }, 1797 [OP_SETCLIENTID_CONFIRM] = { 1798 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1799 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1800 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1801 .op_name = "OP_SETCLIENTID_CONFIRM", 1802 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1803 }, 1804 [OP_VERIFY] = { 1805 .op_func = (nfsd4op_func)nfsd4_verify, 1806 .op_name = "OP_VERIFY", 1807 }, 1808 [OP_WRITE] = { 1809 .op_func = (nfsd4op_func)nfsd4_write, 1810 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1811 .op_name = "OP_WRITE", 1812 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 1813 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 1814 }, 1815 [OP_RELEASE_LOCKOWNER] = { 1816 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1817 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1818 | OP_MODIFIES_SOMETHING, 1819 .op_name = "OP_RELEASE_LOCKOWNER", 1820 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1821 }, 1822 1823 /* NFSv4.1 operations */ 1824 [OP_EXCHANGE_ID] = { 1825 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1826 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1827 | OP_MODIFIES_SOMETHING, 1828 .op_name = "OP_EXCHANGE_ID", 1829 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 1830 }, 1831 [OP_BACKCHANNEL_CTL] = { 1832 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 1833 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1834 .op_name = "OP_BACKCHANNEL_CTL", 1835 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1836 }, 1837 [OP_BIND_CONN_TO_SESSION] = { 1838 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 1839 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1840 | OP_MODIFIES_SOMETHING, 1841 .op_name = "OP_BIND_CONN_TO_SESSION", 1842 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 1843 }, 1844 [OP_CREATE_SESSION] = { 1845 .op_func = (nfsd4op_func)nfsd4_create_session, 1846 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1847 | OP_MODIFIES_SOMETHING, 1848 .op_name = "OP_CREATE_SESSION", 1849 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 1850 }, 1851 [OP_DESTROY_SESSION] = { 1852 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1853 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1854 | OP_MODIFIES_SOMETHING, 1855 .op_name = "OP_DESTROY_SESSION", 1856 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1857 }, 1858 [OP_SEQUENCE] = { 1859 .op_func = (nfsd4op_func)nfsd4_sequence, 1860 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1861 .op_name = "OP_SEQUENCE", 1862 }, 1863 [OP_DESTROY_CLIENTID] = { 1864 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 1865 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1866 | OP_MODIFIES_SOMETHING, 1867 .op_name = "OP_DESTROY_CLIENTID", 1868 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1869 }, 1870 [OP_RECLAIM_COMPLETE] = { 1871 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 1872 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1873 .op_name = "OP_RECLAIM_COMPLETE", 1874 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1875 }, 1876 [OP_SECINFO_NO_NAME] = { 1877 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 1878 .op_flags = OP_HANDLES_WRONGSEC, 1879 .op_name = "OP_SECINFO_NO_NAME", 1880 }, 1881 [OP_TEST_STATEID] = { 1882 .op_func = (nfsd4op_func)nfsd4_test_stateid, 1883 .op_flags = ALLOWED_WITHOUT_FH, 1884 .op_name = "OP_TEST_STATEID", 1885 }, 1886 [OP_FREE_STATEID] = { 1887 .op_func = (nfsd4op_func)nfsd4_free_stateid, 1888 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1889 .op_name = "OP_FREE_STATEID", 1890 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 1891 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1892 }, 1893 }; 1894 1895 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 1896 { 1897 struct nfsd4_operation *opdesc; 1898 nfsd4op_rsize estimator; 1899 1900 if (op->opnum == OP_ILLEGAL) 1901 return op_encode_hdr_size * sizeof(__be32); 1902 opdesc = OPDESC(op); 1903 estimator = opdesc->op_rsize_bop; 1904 return estimator ? estimator(rqstp, op) : PAGE_SIZE; 1905 } 1906 1907 void warn_on_nonidempotent_op(struct nfsd4_op *op) 1908 { 1909 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 1910 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 1911 op->opnum, nfsd4_op_name(op->opnum)); 1912 WARN_ON_ONCE(1); 1913 } 1914 } 1915 1916 static const char *nfsd4_op_name(unsigned opnum) 1917 { 1918 if (opnum < ARRAY_SIZE(nfsd4_ops)) 1919 return nfsd4_ops[opnum].op_name; 1920 return "unknown_operation"; 1921 } 1922 1923 #define nfsd4_voidres nfsd4_voidargs 1924 struct nfsd4_voidargs { int dummy; }; 1925 1926 static struct svc_procedure nfsd_procedures4[2] = { 1927 [NFSPROC4_NULL] = { 1928 .pc_func = (svc_procfunc) nfsd4_proc_null, 1929 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 1930 .pc_argsize = sizeof(struct nfsd4_voidargs), 1931 .pc_ressize = sizeof(struct nfsd4_voidres), 1932 .pc_cachetype = RC_NOCACHE, 1933 .pc_xdrressize = 1, 1934 }, 1935 [NFSPROC4_COMPOUND] = { 1936 .pc_func = (svc_procfunc) nfsd4_proc_compound, 1937 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 1938 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 1939 .pc_argsize = sizeof(struct nfsd4_compoundargs), 1940 .pc_ressize = sizeof(struct nfsd4_compoundres), 1941 .pc_release = nfsd4_release_compoundargs, 1942 .pc_cachetype = RC_NOCACHE, 1943 .pc_xdrressize = NFSD_BUFSIZE/4, 1944 }, 1945 }; 1946 1947 struct svc_version nfsd_version4 = { 1948 .vs_vers = 4, 1949 .vs_nproc = 2, 1950 .vs_proc = nfsd_procedures4, 1951 .vs_dispatch = nfsd_dispatch, 1952 .vs_xdrsize = NFS4_SVC_XDRSIZE, 1953 .vs_rpcb_optnl = 1, 1954 }; 1955 1956 /* 1957 * Local variables: 1958 * c-basic-offset: 8 1959 * End: 1960 */ 1961