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/fs_struct.h> 36 #include <linux/file.h> 37 #include <linux/falloc.h> 38 #include <linux/slab.h> 39 #include <linux/kthread.h> 40 41 #include "idmap.h" 42 #include "cache.h" 43 #include "xdr4.h" 44 #include "vfs.h" 45 #include "current_stateid.h" 46 #include "netns.h" 47 #include "acl.h" 48 #include "pnfs.h" 49 #include "trace.h" 50 51 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 52 #include <linux/security.h> 53 54 static inline void 55 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 56 { 57 struct inode *inode = d_inode(resfh->fh_dentry); 58 int status; 59 60 inode_lock(inode); 61 status = security_inode_setsecctx(resfh->fh_dentry, 62 label->data, label->len); 63 inode_unlock(inode); 64 65 if (status) 66 /* 67 * XXX: We should really fail the whole open, but we may 68 * already have created a new file, so it may be too 69 * late. For now this seems the least of evils: 70 */ 71 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 72 73 return; 74 } 75 #else 76 static inline void 77 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 78 { } 79 #endif 80 81 #define NFSDDBG_FACILITY NFSDDBG_PROC 82 83 static u32 nfsd_attrmask[] = { 84 NFSD_WRITEABLE_ATTRS_WORD0, 85 NFSD_WRITEABLE_ATTRS_WORD1, 86 NFSD_WRITEABLE_ATTRS_WORD2 87 }; 88 89 static u32 nfsd41_ex_attrmask[] = { 90 NFSD_SUPPATTR_EXCLCREAT_WORD0, 91 NFSD_SUPPATTR_EXCLCREAT_WORD1, 92 NFSD_SUPPATTR_EXCLCREAT_WORD2 93 }; 94 95 static __be32 96 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 97 u32 *bmval, u32 *writable) 98 { 99 struct dentry *dentry = cstate->current_fh.fh_dentry; 100 struct svc_export *exp = cstate->current_fh.fh_export; 101 102 if (!nfsd_attrs_supported(cstate->minorversion, bmval)) 103 return nfserr_attrnotsupp; 104 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry))) 105 return nfserr_attrnotsupp; 106 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) && 107 !(exp->ex_flags & NFSEXP_SECURITY_LABEL)) 108 return nfserr_attrnotsupp; 109 if (writable && !bmval_is_subset(bmval, writable)) 110 return nfserr_inval; 111 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) && 112 (bmval[1] & FATTR4_WORD1_MODE)) 113 return nfserr_inval; 114 return nfs_ok; 115 } 116 117 static __be32 118 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 119 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 120 { 121 __be32 status = nfs_ok; 122 123 if (open->op_create == NFS4_OPEN_CREATE) { 124 if (open->op_createmode == NFS4_CREATE_UNCHECKED 125 || open->op_createmode == NFS4_CREATE_GUARDED) 126 status = check_attr_support(rqstp, cstate, 127 open->op_bmval, nfsd_attrmask); 128 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 129 status = check_attr_support(rqstp, cstate, 130 open->op_bmval, nfsd41_ex_attrmask); 131 } 132 133 return status; 134 } 135 136 static int 137 is_create_with_attrs(struct nfsd4_open *open) 138 { 139 return open->op_create == NFS4_OPEN_CREATE 140 && (open->op_createmode == NFS4_CREATE_UNCHECKED 141 || open->op_createmode == NFS4_CREATE_GUARDED 142 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 143 } 144 145 /* 146 * if error occurs when setting the acl, just clear the acl bit 147 * in the returned attr bitmap. 148 */ 149 static void 150 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 151 struct nfs4_acl *acl, u32 *bmval) 152 { 153 __be32 status; 154 155 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 156 if (status) 157 /* 158 * We should probably fail the whole open at this point, 159 * but we've already created the file, so it's too late; 160 * So this seems the least of evils: 161 */ 162 bmval[0] &= ~FATTR4_WORD0_ACL; 163 } 164 165 static inline void 166 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 167 { 168 fh_put(dst); 169 dget(src->fh_dentry); 170 if (src->fh_export) 171 exp_get(src->fh_export); 172 *dst = *src; 173 } 174 175 static __be32 176 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 177 { 178 __be32 status; 179 180 if (open->op_truncate && 181 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 182 return nfserr_inval; 183 184 accmode |= NFSD_MAY_READ_IF_EXEC; 185 186 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 187 accmode |= NFSD_MAY_READ; 188 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 189 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 190 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 191 accmode |= NFSD_MAY_WRITE; 192 193 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 194 195 return status; 196 } 197 198 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 199 { 200 umode_t mode = d_inode(fh->fh_dentry)->i_mode; 201 202 if (S_ISREG(mode)) 203 return nfs_ok; 204 if (S_ISDIR(mode)) 205 return nfserr_isdir; 206 /* 207 * Using err_symlink as our catch-all case may look odd; but 208 * there's no other obvious error for this case in 4.0, and we 209 * happen to know that it will cause the linux v4 client to do 210 * the right thing on attempts to open something other than a 211 * regular file. 212 */ 213 return nfserr_symlink; 214 } 215 216 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 217 { 218 if (nfsd4_has_session(cstate)) 219 return; 220 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 221 &resfh->fh_handle); 222 } 223 224 static __be32 225 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) 226 { 227 struct svc_fh *current_fh = &cstate->current_fh; 228 int accmode; 229 __be32 status; 230 231 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 232 if (!*resfh) 233 return nfserr_jukebox; 234 fh_init(*resfh, NFS4_FHSIZE); 235 open->op_truncate = 0; 236 237 if (open->op_create) { 238 /* FIXME: check session persistence and pnfs flags. 239 * The nfsv4.1 spec requires the following semantics: 240 * 241 * Persistent | pNFS | Server REQUIRED | Client Allowed 242 * Reply Cache | server | | 243 * -------------+--------+-----------------+-------------------- 244 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 245 * | | | (SHOULD) 246 * | | and EXCLUSIVE4 | or EXCLUSIVE4 247 * | | | (SHOULD NOT) 248 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 249 * yes | no | GUARDED4 | GUARDED4 250 * yes | yes | GUARDED4 | GUARDED4 251 */ 252 253 /* 254 * Note: create modes (UNCHECKED,GUARDED...) are the same 255 * in NFSv4 as in v3 except EXCLUSIVE4_1. 256 */ 257 current->fs->umask = open->op_umask; 258 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, 259 open->op_fname.len, &open->op_iattr, 260 *resfh, open->op_createmode, 261 (u32 *)open->op_verf.data, 262 &open->op_truncate, &open->op_created); 263 current->fs->umask = 0; 264 265 if (!status && open->op_label.len) 266 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); 267 268 /* 269 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4 270 * use the returned bitmask to indicate which attributes 271 * we used to store the verifier: 272 */ 273 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0) 274 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS | 275 FATTR4_WORD1_TIME_MODIFY); 276 } else 277 /* 278 * Note this may exit with the parent still locked. 279 * We will hold the lock until nfsd4_open's final 280 * lookup, to prevent renames or unlinks until we've had 281 * a chance to an acquire a delegation if appropriate. 282 */ 283 status = nfsd_lookup(rqstp, current_fh, 284 open->op_fname.data, open->op_fname.len, *resfh); 285 if (status) 286 goto out; 287 status = nfsd_check_obj_isreg(*resfh); 288 if (status) 289 goto out; 290 291 if (is_create_with_attrs(open) && open->op_acl != NULL) 292 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); 293 294 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); 295 accmode = NFSD_MAY_NOP; 296 if (open->op_created || 297 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 298 accmode |= NFSD_MAY_OWNER_OVERRIDE; 299 status = do_open_permission(rqstp, *resfh, open, accmode); 300 set_change_info(&open->op_cinfo, current_fh); 301 out: 302 return status; 303 } 304 305 static __be32 306 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 307 { 308 struct svc_fh *current_fh = &cstate->current_fh; 309 __be32 status; 310 int accmode = 0; 311 312 /* We don't know the target directory, and therefore can not 313 * set the change info 314 */ 315 316 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 317 318 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 319 320 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 321 (open->op_iattr.ia_size == 0); 322 /* 323 * In the delegation case, the client is telling us about an 324 * open that it *already* performed locally, some time ago. We 325 * should let it succeed now if possible. 326 * 327 * In the case of a CLAIM_FH open, on the other hand, the client 328 * may be counting on us to enforce permissions (the Linux 4.1 329 * client uses this for normal opens, for example). 330 */ 331 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 332 accmode = NFSD_MAY_OWNER_OVERRIDE; 333 334 status = do_open_permission(rqstp, current_fh, open, accmode); 335 336 return status; 337 } 338 339 static void 340 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 341 { 342 struct nfsd4_sessionid *sid = 343 (struct nfsd4_sessionid *)session->se_sessionid.data; 344 345 clid->cl_boot = sid->clientid.cl_boot; 346 clid->cl_id = sid->clientid.cl_id; 347 } 348 349 static __be32 350 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 351 union nfsd4_op_u *u) 352 { 353 struct nfsd4_open *open = &u->open; 354 __be32 status; 355 struct svc_fh *resfh = NULL; 356 struct net *net = SVC_NET(rqstp); 357 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 358 bool reclaim = false; 359 360 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 361 (int)open->op_fname.len, open->op_fname.data, 362 open->op_openowner); 363 364 /* This check required by spec. */ 365 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 366 return nfserr_inval; 367 368 open->op_created = 0; 369 /* 370 * RFC5661 18.51.3 371 * Before RECLAIM_COMPLETE done, server should deny new lock 372 */ 373 if (nfsd4_has_session(cstate) && 374 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 375 &cstate->session->se_client->cl_flags) && 376 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 377 return nfserr_grace; 378 379 if (nfsd4_has_session(cstate)) 380 copy_clientid(&open->op_clientid, cstate->session); 381 382 /* check seqid for replay. set nfs4_owner */ 383 status = nfsd4_process_open1(cstate, open, nn); 384 if (status == nfserr_replay_me) { 385 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 386 fh_put(&cstate->current_fh); 387 fh_copy_shallow(&cstate->current_fh.fh_handle, 388 &rp->rp_openfh); 389 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 390 if (status) 391 dprintk("nfsd4_open: replay failed" 392 " restoring previous filehandle\n"); 393 else 394 status = nfserr_replay_me; 395 } 396 if (status) 397 goto out; 398 if (open->op_xdr_error) { 399 status = open->op_xdr_error; 400 goto out; 401 } 402 403 status = nfsd4_check_open_attributes(rqstp, cstate, open); 404 if (status) 405 goto out; 406 407 /* Openowner is now set, so sequence id will get bumped. Now we need 408 * these checks before we do any creates: */ 409 status = nfserr_grace; 410 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 411 goto out; 412 status = nfserr_no_grace; 413 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 414 goto out; 415 416 switch (open->op_claim_type) { 417 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 418 case NFS4_OPEN_CLAIM_NULL: 419 status = do_open_lookup(rqstp, cstate, open, &resfh); 420 if (status) 421 goto out; 422 break; 423 case NFS4_OPEN_CLAIM_PREVIOUS: 424 status = nfs4_check_open_reclaim(&open->op_clientid, 425 cstate, nn); 426 if (status) 427 goto out; 428 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 429 reclaim = true; 430 /* fall through */ 431 case NFS4_OPEN_CLAIM_FH: 432 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 433 status = do_open_fhandle(rqstp, cstate, open); 434 if (status) 435 goto out; 436 resfh = &cstate->current_fh; 437 break; 438 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 439 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 440 dprintk("NFSD: unsupported OPEN claim type %d\n", 441 open->op_claim_type); 442 status = nfserr_notsupp; 443 goto out; 444 default: 445 dprintk("NFSD: Invalid OPEN claim type %d\n", 446 open->op_claim_type); 447 status = nfserr_inval; 448 goto out; 449 } 450 /* 451 * nfsd4_process_open2() does the actual opening of the file. If 452 * successful, it (1) truncates the file if open->op_truncate was 453 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 454 */ 455 status = nfsd4_process_open2(rqstp, resfh, open); 456 WARN(status && open->op_created, 457 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 458 be32_to_cpu(status)); 459 if (reclaim && !status) 460 nn->somebody_reclaimed = true; 461 out: 462 if (resfh && resfh != &cstate->current_fh) { 463 fh_dup2(&cstate->current_fh, resfh); 464 fh_put(resfh); 465 kfree(resfh); 466 } 467 nfsd4_cleanup_open_state(cstate, open); 468 nfsd4_bump_seqid(cstate, status); 469 return status; 470 } 471 472 /* 473 * OPEN is the only seqid-mutating operation whose decoding can fail 474 * with a seqid-mutating error (specifically, decoding of user names in 475 * the attributes). Therefore we have to do some processing to look up 476 * the stateowner so that we can bump the seqid. 477 */ 478 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 479 { 480 struct nfsd4_open *open = &op->u.open; 481 482 if (!seqid_mutating_err(ntohl(op->status))) 483 return op->status; 484 if (nfsd4_has_session(cstate)) 485 return op->status; 486 open->op_xdr_error = op->status; 487 return nfsd4_open(rqstp, cstate, &op->u); 488 } 489 490 /* 491 * filehandle-manipulating ops. 492 */ 493 static __be32 494 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 495 union nfsd4_op_u *u) 496 { 497 u->getfh = &cstate->current_fh; 498 return nfs_ok; 499 } 500 501 static __be32 502 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 503 union nfsd4_op_u *u) 504 { 505 struct nfsd4_putfh *putfh = &u->putfh; 506 507 fh_put(&cstate->current_fh); 508 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 509 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 510 putfh->pf_fhlen); 511 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 512 } 513 514 static __be32 515 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 516 union nfsd4_op_u *u) 517 { 518 __be32 status; 519 520 fh_put(&cstate->current_fh); 521 status = exp_pseudoroot(rqstp, &cstate->current_fh); 522 return status; 523 } 524 525 static __be32 526 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 527 union nfsd4_op_u *u) 528 { 529 if (!cstate->save_fh.fh_dentry) 530 return nfserr_restorefh; 531 532 fh_dup2(&cstate->current_fh, &cstate->save_fh); 533 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 534 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 535 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 536 } 537 return nfs_ok; 538 } 539 540 static __be32 541 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 542 union nfsd4_op_u *u) 543 { 544 fh_dup2(&cstate->save_fh, &cstate->current_fh); 545 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 546 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 547 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 548 } 549 return nfs_ok; 550 } 551 552 /* 553 * misc nfsv4 ops 554 */ 555 static __be32 556 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 557 union nfsd4_op_u *u) 558 { 559 struct nfsd4_access *access = &u->access; 560 561 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 562 return nfserr_inval; 563 564 access->ac_resp_access = access->ac_req_access; 565 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 566 &access->ac_supported); 567 } 568 569 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 570 { 571 __be32 verf[2]; 572 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 573 574 /* 575 * This is opaque to client, so no need to byte-swap. Use 576 * __force to keep sparse happy. y2038 time_t overflow is 577 * irrelevant in this usage. 578 */ 579 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec; 580 verf[1] = (__force __be32)nn->nfssvc_boot.tv_nsec; 581 memcpy(verifier->data, verf, sizeof(verifier->data)); 582 } 583 584 static __be32 585 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 586 union nfsd4_op_u *u) 587 { 588 struct nfsd4_commit *commit = &u->commit; 589 590 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 591 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 592 commit->co_count); 593 } 594 595 static __be32 596 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 597 union nfsd4_op_u *u) 598 { 599 struct nfsd4_create *create = &u->create; 600 struct svc_fh resfh; 601 __be32 status; 602 dev_t rdev; 603 604 fh_init(&resfh, NFS4_FHSIZE); 605 606 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP); 607 if (status) 608 return status; 609 610 status = check_attr_support(rqstp, cstate, create->cr_bmval, 611 nfsd_attrmask); 612 if (status) 613 return status; 614 615 current->fs->umask = create->cr_umask; 616 switch (create->cr_type) { 617 case NF4LNK: 618 status = nfsd_symlink(rqstp, &cstate->current_fh, 619 create->cr_name, create->cr_namelen, 620 create->cr_data, &resfh); 621 break; 622 623 case NF4BLK: 624 status = nfserr_inval; 625 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 626 if (MAJOR(rdev) != create->cr_specdata1 || 627 MINOR(rdev) != create->cr_specdata2) 628 goto out_umask; 629 status = nfsd_create(rqstp, &cstate->current_fh, 630 create->cr_name, create->cr_namelen, 631 &create->cr_iattr, S_IFBLK, rdev, &resfh); 632 break; 633 634 case NF4CHR: 635 status = nfserr_inval; 636 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 637 if (MAJOR(rdev) != create->cr_specdata1 || 638 MINOR(rdev) != create->cr_specdata2) 639 goto out_umask; 640 status = nfsd_create(rqstp, &cstate->current_fh, 641 create->cr_name, create->cr_namelen, 642 &create->cr_iattr,S_IFCHR, rdev, &resfh); 643 break; 644 645 case NF4SOCK: 646 status = nfsd_create(rqstp, &cstate->current_fh, 647 create->cr_name, create->cr_namelen, 648 &create->cr_iattr, S_IFSOCK, 0, &resfh); 649 break; 650 651 case NF4FIFO: 652 status = nfsd_create(rqstp, &cstate->current_fh, 653 create->cr_name, create->cr_namelen, 654 &create->cr_iattr, S_IFIFO, 0, &resfh); 655 break; 656 657 case NF4DIR: 658 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 659 status = nfsd_create(rqstp, &cstate->current_fh, 660 create->cr_name, create->cr_namelen, 661 &create->cr_iattr, S_IFDIR, 0, &resfh); 662 break; 663 664 default: 665 status = nfserr_badtype; 666 } 667 668 if (status) 669 goto out; 670 671 if (create->cr_label.len) 672 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 673 674 if (create->cr_acl != NULL) 675 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 676 create->cr_bmval); 677 678 fh_unlock(&cstate->current_fh); 679 set_change_info(&create->cr_cinfo, &cstate->current_fh); 680 fh_dup2(&cstate->current_fh, &resfh); 681 out: 682 fh_put(&resfh); 683 out_umask: 684 current->fs->umask = 0; 685 return status; 686 } 687 688 static __be32 689 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 690 union nfsd4_op_u *u) 691 { 692 struct nfsd4_getattr *getattr = &u->getattr; 693 __be32 status; 694 695 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 696 if (status) 697 return status; 698 699 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 700 return nfserr_inval; 701 702 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 703 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 704 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 705 706 getattr->ga_fhp = &cstate->current_fh; 707 return nfs_ok; 708 } 709 710 static __be32 711 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 712 union nfsd4_op_u *u) 713 { 714 struct nfsd4_link *link = &u->link; 715 __be32 status; 716 717 status = nfsd_link(rqstp, &cstate->current_fh, 718 link->li_name, link->li_namelen, &cstate->save_fh); 719 if (!status) 720 set_change_info(&link->li_cinfo, &cstate->current_fh); 721 return status; 722 } 723 724 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 725 { 726 struct svc_fh tmp_fh; 727 __be32 ret; 728 729 fh_init(&tmp_fh, NFS4_FHSIZE); 730 ret = exp_pseudoroot(rqstp, &tmp_fh); 731 if (ret) 732 return ret; 733 if (tmp_fh.fh_dentry == fh->fh_dentry) { 734 fh_put(&tmp_fh); 735 return nfserr_noent; 736 } 737 fh_put(&tmp_fh); 738 return nfsd_lookup(rqstp, fh, "..", 2, fh); 739 } 740 741 static __be32 742 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 743 union nfsd4_op_u *u) 744 { 745 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 746 } 747 748 static __be32 749 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 750 union nfsd4_op_u *u) 751 { 752 return nfsd_lookup(rqstp, &cstate->current_fh, 753 u->lookup.lo_name, u->lookup.lo_len, 754 &cstate->current_fh); 755 } 756 757 static __be32 758 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 759 union nfsd4_op_u *u) 760 { 761 struct nfsd4_read *read = &u->read; 762 __be32 status; 763 764 read->rd_filp = NULL; 765 if (read->rd_offset >= OFFSET_MAX) 766 return nfserr_inval; 767 768 trace_nfsd_read_start(rqstp, &cstate->current_fh, 769 read->rd_offset, read->rd_length); 770 771 /* 772 * If we do a zero copy read, then a client will see read data 773 * that reflects the state of the file *after* performing the 774 * following compound. 775 * 776 * To ensure proper ordering, we therefore turn off zero copy if 777 * the client wants us to do more in this compound: 778 */ 779 if (!nfsd4_last_compound_op(rqstp)) 780 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 781 782 /* check stateid */ 783 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 784 &read->rd_stateid, RD_STATE, 785 &read->rd_filp, &read->rd_tmp_file); 786 if (status) { 787 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 788 goto out; 789 } 790 status = nfs_ok; 791 out: 792 read->rd_rqstp = rqstp; 793 read->rd_fhp = &cstate->current_fh; 794 return status; 795 } 796 797 798 static void 799 nfsd4_read_release(union nfsd4_op_u *u) 800 { 801 if (u->read.rd_filp) 802 fput(u->read.rd_filp); 803 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp, 804 u->read.rd_offset, u->read.rd_length); 805 } 806 807 static __be32 808 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 809 union nfsd4_op_u *u) 810 { 811 struct nfsd4_readdir *readdir = &u->readdir; 812 u64 cookie = readdir->rd_cookie; 813 static const nfs4_verifier zeroverf; 814 815 /* no need to check permission - this will be done in nfsd_readdir() */ 816 817 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 818 return nfserr_inval; 819 820 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 821 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 822 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 823 824 if ((cookie == 1) || (cookie == 2) || 825 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 826 return nfserr_bad_cookie; 827 828 readdir->rd_rqstp = rqstp; 829 readdir->rd_fhp = &cstate->current_fh; 830 return nfs_ok; 831 } 832 833 static __be32 834 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 835 union nfsd4_op_u *u) 836 { 837 u->readlink.rl_rqstp = rqstp; 838 u->readlink.rl_fhp = &cstate->current_fh; 839 return nfs_ok; 840 } 841 842 static __be32 843 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 844 union nfsd4_op_u *u) 845 { 846 struct nfsd4_remove *remove = &u->remove; 847 __be32 status; 848 849 if (opens_in_grace(SVC_NET(rqstp))) 850 return nfserr_grace; 851 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 852 remove->rm_name, remove->rm_namelen); 853 if (!status) { 854 fh_unlock(&cstate->current_fh); 855 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 856 } 857 return status; 858 } 859 860 static __be32 861 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 862 union nfsd4_op_u *u) 863 { 864 struct nfsd4_rename *rename = &u->rename; 865 __be32 status; 866 867 if (opens_in_grace(SVC_NET(rqstp))) 868 return nfserr_grace; 869 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 870 rename->rn_snamelen, &cstate->current_fh, 871 rename->rn_tname, rename->rn_tnamelen); 872 if (status) 873 return status; 874 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 875 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 876 return nfs_ok; 877 } 878 879 static __be32 880 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 881 union nfsd4_op_u *u) 882 { 883 struct nfsd4_secinfo *secinfo = &u->secinfo; 884 struct svc_export *exp; 885 struct dentry *dentry; 886 __be32 err; 887 888 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 889 if (err) 890 return err; 891 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 892 secinfo->si_name, secinfo->si_namelen, 893 &exp, &dentry); 894 if (err) 895 return err; 896 fh_unlock(&cstate->current_fh); 897 if (d_really_is_negative(dentry)) { 898 exp_put(exp); 899 err = nfserr_noent; 900 } else 901 secinfo->si_exp = exp; 902 dput(dentry); 903 if (cstate->minorversion) 904 /* See rfc 5661 section 2.6.3.1.1.8 */ 905 fh_put(&cstate->current_fh); 906 return err; 907 } 908 909 static __be32 910 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 911 union nfsd4_op_u *u) 912 { 913 __be32 err; 914 915 switch (u->secinfo_no_name.sin_style) { 916 case NFS4_SECINFO_STYLE4_CURRENT_FH: 917 break; 918 case NFS4_SECINFO_STYLE4_PARENT: 919 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 920 if (err) 921 return err; 922 break; 923 default: 924 return nfserr_inval; 925 } 926 927 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export); 928 fh_put(&cstate->current_fh); 929 return nfs_ok; 930 } 931 932 static void 933 nfsd4_secinfo_release(union nfsd4_op_u *u) 934 { 935 if (u->secinfo.si_exp) 936 exp_put(u->secinfo.si_exp); 937 } 938 939 static void 940 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u) 941 { 942 if (u->secinfo_no_name.sin_exp) 943 exp_put(u->secinfo_no_name.sin_exp); 944 } 945 946 static __be32 947 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 948 union nfsd4_op_u *u) 949 { 950 struct nfsd4_setattr *setattr = &u->setattr; 951 __be32 status = nfs_ok; 952 int err; 953 954 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 955 status = nfs4_preprocess_stateid_op(rqstp, cstate, 956 &cstate->current_fh, &setattr->sa_stateid, 957 WR_STATE, NULL, NULL); 958 if (status) { 959 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 960 return status; 961 } 962 } 963 err = fh_want_write(&cstate->current_fh); 964 if (err) 965 return nfserrno(err); 966 status = nfs_ok; 967 968 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 969 nfsd_attrmask); 970 if (status) 971 goto out; 972 973 if (setattr->sa_acl != NULL) 974 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 975 setattr->sa_acl); 976 if (status) 977 goto out; 978 if (setattr->sa_label.len) 979 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 980 &setattr->sa_label); 981 if (status) 982 goto out; 983 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 984 0, (time_t)0); 985 out: 986 fh_drop_write(&cstate->current_fh); 987 return status; 988 } 989 990 static __be32 991 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 992 union nfsd4_op_u *u) 993 { 994 struct nfsd4_write *write = &u->write; 995 stateid_t *stateid = &write->wr_stateid; 996 struct file *filp = NULL; 997 __be32 status = nfs_ok; 998 unsigned long cnt; 999 int nvecs; 1000 1001 if (write->wr_offset >= OFFSET_MAX) 1002 return nfserr_inval; 1003 1004 cnt = write->wr_buflen; 1005 trace_nfsd_write_start(rqstp, &cstate->current_fh, 1006 write->wr_offset, cnt); 1007 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1008 stateid, WR_STATE, &filp, NULL); 1009 if (status) { 1010 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 1011 return status; 1012 } 1013 1014 write->wr_how_written = write->wr_stable_how; 1015 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 1016 1017 nvecs = svc_fill_write_vector(rqstp, write->wr_pagelist, 1018 &write->wr_head, write->wr_buflen); 1019 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1020 1021 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp, 1022 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 1023 write->wr_how_written); 1024 fput(filp); 1025 1026 write->wr_bytes_written = cnt; 1027 trace_nfsd_write_done(rqstp, &cstate->current_fh, 1028 write->wr_offset, cnt); 1029 return status; 1030 } 1031 1032 static __be32 1033 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1034 stateid_t *src_stateid, struct file **src, 1035 stateid_t *dst_stateid, struct file **dst) 1036 { 1037 __be32 status; 1038 1039 if (!cstate->save_fh.fh_dentry) 1040 return nfserr_nofilehandle; 1041 1042 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, 1043 src_stateid, RD_STATE, src, NULL); 1044 if (status) { 1045 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); 1046 goto out; 1047 } 1048 1049 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1050 dst_stateid, WR_STATE, dst, NULL); 1051 if (status) { 1052 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); 1053 goto out_put_src; 1054 } 1055 1056 /* fix up for NFS-specific error code */ 1057 if (!S_ISREG(file_inode(*src)->i_mode) || 1058 !S_ISREG(file_inode(*dst)->i_mode)) { 1059 status = nfserr_wrong_type; 1060 goto out_put_dst; 1061 } 1062 1063 out: 1064 return status; 1065 out_put_dst: 1066 fput(*dst); 1067 out_put_src: 1068 fput(*src); 1069 goto out; 1070 } 1071 1072 static __be32 1073 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1074 union nfsd4_op_u *u) 1075 { 1076 struct nfsd4_clone *clone = &u->clone; 1077 struct file *src, *dst; 1078 __be32 status; 1079 1080 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src, 1081 &clone->cl_dst_stateid, &dst); 1082 if (status) 1083 goto out; 1084 1085 status = nfsd4_clone_file_range(src, clone->cl_src_pos, 1086 dst, clone->cl_dst_pos, clone->cl_count); 1087 1088 fput(dst); 1089 fput(src); 1090 out: 1091 return status; 1092 } 1093 1094 void nfs4_put_copy(struct nfsd4_copy *copy) 1095 { 1096 if (!refcount_dec_and_test(©->refcount)) 1097 return; 1098 kfree(copy); 1099 } 1100 1101 static bool 1102 check_and_set_stop_copy(struct nfsd4_copy *copy) 1103 { 1104 bool value; 1105 1106 spin_lock(©->cp_clp->async_lock); 1107 value = copy->stopped; 1108 if (!copy->stopped) 1109 copy->stopped = true; 1110 spin_unlock(©->cp_clp->async_lock); 1111 return value; 1112 } 1113 1114 static void nfsd4_stop_copy(struct nfsd4_copy *copy) 1115 { 1116 /* only 1 thread should stop the copy */ 1117 if (!check_and_set_stop_copy(copy)) 1118 kthread_stop(copy->copy_task); 1119 nfs4_put_copy(copy); 1120 } 1121 1122 static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp) 1123 { 1124 struct nfsd4_copy *copy = NULL; 1125 1126 spin_lock(&clp->async_lock); 1127 if (!list_empty(&clp->async_copies)) { 1128 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy, 1129 copies); 1130 refcount_inc(©->refcount); 1131 } 1132 spin_unlock(&clp->async_lock); 1133 return copy; 1134 } 1135 1136 void nfsd4_shutdown_copy(struct nfs4_client *clp) 1137 { 1138 struct nfsd4_copy *copy; 1139 1140 while ((copy = nfsd4_get_copy(clp)) != NULL) 1141 nfsd4_stop_copy(copy); 1142 } 1143 1144 static void nfsd4_cb_offload_release(struct nfsd4_callback *cb) 1145 { 1146 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb); 1147 1148 nfs4_put_copy(copy); 1149 } 1150 1151 static int nfsd4_cb_offload_done(struct nfsd4_callback *cb, 1152 struct rpc_task *task) 1153 { 1154 return 1; 1155 } 1156 1157 static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = { 1158 .release = nfsd4_cb_offload_release, 1159 .done = nfsd4_cb_offload_done 1160 }; 1161 1162 static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync) 1163 { 1164 copy->cp_res.wr_stable_how = NFS_UNSTABLE; 1165 copy->cp_synchronous = sync; 1166 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net); 1167 } 1168 1169 static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy) 1170 { 1171 ssize_t bytes_copied = 0; 1172 size_t bytes_total = copy->cp_count; 1173 u64 src_pos = copy->cp_src_pos; 1174 u64 dst_pos = copy->cp_dst_pos; 1175 1176 do { 1177 if (kthread_should_stop()) 1178 break; 1179 bytes_copied = nfsd_copy_file_range(copy->file_src, src_pos, 1180 copy->file_dst, dst_pos, bytes_total); 1181 if (bytes_copied <= 0) 1182 break; 1183 bytes_total -= bytes_copied; 1184 copy->cp_res.wr_bytes_written += bytes_copied; 1185 src_pos += bytes_copied; 1186 dst_pos += bytes_copied; 1187 } while (bytes_total > 0 && !copy->cp_synchronous); 1188 return bytes_copied; 1189 } 1190 1191 static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync) 1192 { 1193 __be32 status; 1194 ssize_t bytes; 1195 1196 bytes = _nfsd_copy_file_range(copy); 1197 /* for async copy, we ignore the error, client can always retry 1198 * to get the error 1199 */ 1200 if (bytes < 0 && !copy->cp_res.wr_bytes_written) 1201 status = nfserrno(bytes); 1202 else { 1203 nfsd4_init_copy_res(copy, sync); 1204 status = nfs_ok; 1205 } 1206 1207 fput(copy->file_src); 1208 fput(copy->file_dst); 1209 return status; 1210 } 1211 1212 static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst) 1213 { 1214 dst->cp_src_pos = src->cp_src_pos; 1215 dst->cp_dst_pos = src->cp_dst_pos; 1216 dst->cp_count = src->cp_count; 1217 dst->cp_synchronous = src->cp_synchronous; 1218 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res)); 1219 memcpy(&dst->fh, &src->fh, sizeof(src->fh)); 1220 dst->cp_clp = src->cp_clp; 1221 dst->file_dst = get_file(src->file_dst); 1222 dst->file_src = get_file(src->file_src); 1223 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid)); 1224 } 1225 1226 static void cleanup_async_copy(struct nfsd4_copy *copy) 1227 { 1228 nfs4_free_cp_state(copy); 1229 fput(copy->file_dst); 1230 fput(copy->file_src); 1231 spin_lock(©->cp_clp->async_lock); 1232 list_del(©->copies); 1233 spin_unlock(©->cp_clp->async_lock); 1234 nfs4_put_copy(copy); 1235 } 1236 1237 static int nfsd4_do_async_copy(void *data) 1238 { 1239 struct nfsd4_copy *copy = (struct nfsd4_copy *)data; 1240 struct nfsd4_copy *cb_copy; 1241 1242 copy->nfserr = nfsd4_do_copy(copy, 0); 1243 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1244 if (!cb_copy) 1245 goto out; 1246 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res)); 1247 cb_copy->cp_clp = copy->cp_clp; 1248 cb_copy->nfserr = copy->nfserr; 1249 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh)); 1250 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp, 1251 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD); 1252 nfsd4_run_cb(&cb_copy->cp_cb); 1253 out: 1254 cleanup_async_copy(copy); 1255 return 0; 1256 } 1257 1258 static __be32 1259 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1260 union nfsd4_op_u *u) 1261 { 1262 struct nfsd4_copy *copy = &u->copy; 1263 __be32 status; 1264 struct nfsd4_copy *async_copy = NULL; 1265 1266 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, 1267 ©->file_src, ©->cp_dst_stateid, 1268 ©->file_dst); 1269 if (status) 1270 goto out; 1271 1272 copy->cp_clp = cstate->clp; 1273 memcpy(©->fh, &cstate->current_fh.fh_handle, 1274 sizeof(struct knfsd_fh)); 1275 if (!copy->cp_synchronous) { 1276 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1277 1278 status = nfserrno(-ENOMEM); 1279 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1280 if (!async_copy) 1281 goto out; 1282 if (!nfs4_init_cp_state(nn, copy)) { 1283 kfree(async_copy); 1284 goto out; 1285 } 1286 refcount_set(&async_copy->refcount, 1); 1287 memcpy(©->cp_res.cb_stateid, ©->cp_stateid, 1288 sizeof(copy->cp_stateid)); 1289 dup_copy_fields(copy, async_copy); 1290 async_copy->copy_task = kthread_create(nfsd4_do_async_copy, 1291 async_copy, "%s", "copy thread"); 1292 if (IS_ERR(async_copy->copy_task)) 1293 goto out_err; 1294 spin_lock(&async_copy->cp_clp->async_lock); 1295 list_add(&async_copy->copies, 1296 &async_copy->cp_clp->async_copies); 1297 spin_unlock(&async_copy->cp_clp->async_lock); 1298 wake_up_process(async_copy->copy_task); 1299 status = nfs_ok; 1300 } else 1301 status = nfsd4_do_copy(copy, 1); 1302 out: 1303 return status; 1304 out_err: 1305 cleanup_async_copy(async_copy); 1306 goto out; 1307 } 1308 1309 struct nfsd4_copy * 1310 find_async_copy(struct nfs4_client *clp, stateid_t *stateid) 1311 { 1312 struct nfsd4_copy *copy; 1313 1314 spin_lock(&clp->async_lock); 1315 list_for_each_entry(copy, &clp->async_copies, copies) { 1316 if (memcmp(©->cp_stateid, stateid, NFS4_STATEID_SIZE)) 1317 continue; 1318 refcount_inc(©->refcount); 1319 spin_unlock(&clp->async_lock); 1320 return copy; 1321 } 1322 spin_unlock(&clp->async_lock); 1323 return NULL; 1324 } 1325 1326 static __be32 1327 nfsd4_offload_cancel(struct svc_rqst *rqstp, 1328 struct nfsd4_compound_state *cstate, 1329 union nfsd4_op_u *u) 1330 { 1331 struct nfsd4_offload_status *os = &u->offload_status; 1332 __be32 status = 0; 1333 struct nfsd4_copy *copy; 1334 struct nfs4_client *clp = cstate->clp; 1335 1336 copy = find_async_copy(clp, &os->stateid); 1337 if (copy) 1338 nfsd4_stop_copy(copy); 1339 else 1340 status = nfserr_bad_stateid; 1341 1342 return status; 1343 } 1344 1345 static __be32 1346 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1347 struct nfsd4_fallocate *fallocate, int flags) 1348 { 1349 __be32 status; 1350 struct file *file; 1351 1352 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1353 &fallocate->falloc_stateid, 1354 WR_STATE, &file, NULL); 1355 if (status != nfs_ok) { 1356 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1357 return status; 1358 } 1359 1360 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file, 1361 fallocate->falloc_offset, 1362 fallocate->falloc_length, 1363 flags); 1364 fput(file); 1365 return status; 1366 } 1367 static __be32 1368 nfsd4_offload_status(struct svc_rqst *rqstp, 1369 struct nfsd4_compound_state *cstate, 1370 union nfsd4_op_u *u) 1371 { 1372 struct nfsd4_offload_status *os = &u->offload_status; 1373 __be32 status = 0; 1374 struct nfsd4_copy *copy; 1375 struct nfs4_client *clp = cstate->clp; 1376 1377 copy = find_async_copy(clp, &os->stateid); 1378 if (copy) { 1379 os->count = copy->cp_res.wr_bytes_written; 1380 nfs4_put_copy(copy); 1381 } else 1382 status = nfserr_bad_stateid; 1383 1384 return status; 1385 } 1386 1387 static __be32 1388 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1389 union nfsd4_op_u *u) 1390 { 1391 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0); 1392 } 1393 1394 static __be32 1395 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1396 union nfsd4_op_u *u) 1397 { 1398 return nfsd4_fallocate(rqstp, cstate, &u->deallocate, 1399 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1400 } 1401 1402 static __be32 1403 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1404 union nfsd4_op_u *u) 1405 { 1406 struct nfsd4_seek *seek = &u->seek; 1407 int whence; 1408 __be32 status; 1409 struct file *file; 1410 1411 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1412 &seek->seek_stateid, 1413 RD_STATE, &file, NULL); 1414 if (status) { 1415 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1416 return status; 1417 } 1418 1419 switch (seek->seek_whence) { 1420 case NFS4_CONTENT_DATA: 1421 whence = SEEK_DATA; 1422 break; 1423 case NFS4_CONTENT_HOLE: 1424 whence = SEEK_HOLE; 1425 break; 1426 default: 1427 status = nfserr_union_notsupp; 1428 goto out; 1429 } 1430 1431 /* 1432 * Note: This call does change file->f_pos, but nothing in NFSD 1433 * should ever file->f_pos. 1434 */ 1435 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); 1436 if (seek->seek_pos < 0) 1437 status = nfserrno(seek->seek_pos); 1438 else if (seek->seek_pos >= i_size_read(file_inode(file))) 1439 seek->seek_eof = true; 1440 1441 out: 1442 fput(file); 1443 return status; 1444 } 1445 1446 /* This routine never returns NFS_OK! If there are no other errors, it 1447 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1448 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1449 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1450 */ 1451 static __be32 1452 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1453 struct nfsd4_verify *verify) 1454 { 1455 __be32 *buf, *p; 1456 int count; 1457 __be32 status; 1458 1459 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1460 if (status) 1461 return status; 1462 1463 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1464 if (status) 1465 return status; 1466 1467 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1468 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1469 return nfserr_inval; 1470 if (verify->ve_attrlen & 3) 1471 return nfserr_inval; 1472 1473 /* count in words: 1474 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1475 */ 1476 count = 4 + (verify->ve_attrlen >> 2); 1477 buf = kmalloc(count << 2, GFP_KERNEL); 1478 if (!buf) 1479 return nfserr_jukebox; 1480 1481 p = buf; 1482 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1483 cstate->current_fh.fh_export, 1484 cstate->current_fh.fh_dentry, 1485 verify->ve_bmval, 1486 rqstp, 0); 1487 /* 1488 * If nfsd4_encode_fattr() ran out of space, assume that's because 1489 * the attributes are longer (hence different) than those given: 1490 */ 1491 if (status == nfserr_resource) 1492 status = nfserr_not_same; 1493 if (status) 1494 goto out_kfree; 1495 1496 /* skip bitmap */ 1497 p = buf + 1 + ntohl(buf[0]); 1498 status = nfserr_not_same; 1499 if (ntohl(*p++) != verify->ve_attrlen) 1500 goto out_kfree; 1501 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1502 status = nfserr_same; 1503 1504 out_kfree: 1505 kfree(buf); 1506 return status; 1507 } 1508 1509 static __be32 1510 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1511 union nfsd4_op_u *u) 1512 { 1513 __be32 status; 1514 1515 status = _nfsd4_verify(rqstp, cstate, &u->verify); 1516 return status == nfserr_not_same ? nfs_ok : status; 1517 } 1518 1519 static __be32 1520 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1521 union nfsd4_op_u *u) 1522 { 1523 __be32 status; 1524 1525 status = _nfsd4_verify(rqstp, cstate, &u->nverify); 1526 return status == nfserr_same ? nfs_ok : status; 1527 } 1528 1529 #ifdef CONFIG_NFSD_PNFS 1530 static const struct nfsd4_layout_ops * 1531 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1532 { 1533 if (!exp->ex_layout_types) { 1534 dprintk("%s: export does not support pNFS\n", __func__); 1535 return NULL; 1536 } 1537 1538 if (layout_type >= LAYOUT_TYPE_MAX || 1539 !(exp->ex_layout_types & (1 << layout_type))) { 1540 dprintk("%s: layout type %d not supported\n", 1541 __func__, layout_type); 1542 return NULL; 1543 } 1544 1545 return nfsd4_layout_ops[layout_type]; 1546 } 1547 1548 static __be32 1549 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1550 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1551 { 1552 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo; 1553 const struct nfsd4_layout_ops *ops; 1554 struct nfsd4_deviceid_map *map; 1555 struct svc_export *exp; 1556 __be32 nfserr; 1557 1558 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1559 __func__, 1560 gdp->gd_layout_type, 1561 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1562 gdp->gd_maxcount); 1563 1564 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1565 if (!map) { 1566 dprintk("%s: couldn't find device ID to export mapping!\n", 1567 __func__); 1568 return nfserr_noent; 1569 } 1570 1571 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1572 if (IS_ERR(exp)) { 1573 dprintk("%s: could not find device id\n", __func__); 1574 return nfserr_noent; 1575 } 1576 1577 nfserr = nfserr_layoutunavailable; 1578 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1579 if (!ops) 1580 goto out; 1581 1582 nfserr = nfs_ok; 1583 if (gdp->gd_maxcount != 0) { 1584 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1585 rqstp, cstate->session->se_client, gdp); 1586 } 1587 1588 gdp->gd_notify_types &= ops->notify_types; 1589 out: 1590 exp_put(exp); 1591 return nfserr; 1592 } 1593 1594 static void 1595 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u) 1596 { 1597 kfree(u->getdeviceinfo.gd_device); 1598 } 1599 1600 static __be32 1601 nfsd4_layoutget(struct svc_rqst *rqstp, 1602 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1603 { 1604 struct nfsd4_layoutget *lgp = &u->layoutget; 1605 struct svc_fh *current_fh = &cstate->current_fh; 1606 const struct nfsd4_layout_ops *ops; 1607 struct nfs4_layout_stateid *ls; 1608 __be32 nfserr; 1609 int accmode = NFSD_MAY_READ_IF_EXEC; 1610 1611 switch (lgp->lg_seg.iomode) { 1612 case IOMODE_READ: 1613 accmode |= NFSD_MAY_READ; 1614 break; 1615 case IOMODE_RW: 1616 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE; 1617 break; 1618 default: 1619 dprintk("%s: invalid iomode %d\n", 1620 __func__, lgp->lg_seg.iomode); 1621 nfserr = nfserr_badiomode; 1622 goto out; 1623 } 1624 1625 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1626 if (nfserr) 1627 goto out; 1628 1629 nfserr = nfserr_layoutunavailable; 1630 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1631 if (!ops) 1632 goto out; 1633 1634 /* 1635 * Verify minlength and range as per RFC5661: 1636 * o If loga_length is less than loga_minlength, 1637 * the metadata server MUST return NFS4ERR_INVAL. 1638 * o If the sum of loga_offset and loga_minlength exceeds 1639 * NFS4_UINT64_MAX, and loga_minlength is not 1640 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1641 * o If the sum of loga_offset and loga_length exceeds 1642 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1643 * the error NFS4ERR_INVAL MUST result. 1644 */ 1645 nfserr = nfserr_inval; 1646 if (lgp->lg_seg.length < lgp->lg_minlength || 1647 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1648 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1649 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1650 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1651 goto out; 1652 if (lgp->lg_seg.length == 0) 1653 goto out; 1654 1655 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1656 true, lgp->lg_layout_type, &ls); 1657 if (nfserr) { 1658 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid); 1659 goto out; 1660 } 1661 1662 nfserr = nfserr_recallconflict; 1663 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1664 goto out_put_stid; 1665 1666 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1667 current_fh, lgp); 1668 if (nfserr) 1669 goto out_put_stid; 1670 1671 nfserr = nfsd4_insert_layout(lgp, ls); 1672 1673 out_put_stid: 1674 mutex_unlock(&ls->ls_mutex); 1675 nfs4_put_stid(&ls->ls_stid); 1676 out: 1677 return nfserr; 1678 } 1679 1680 static void 1681 nfsd4_layoutget_release(union nfsd4_op_u *u) 1682 { 1683 kfree(u->layoutget.lg_content); 1684 } 1685 1686 static __be32 1687 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1688 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1689 { 1690 struct nfsd4_layoutcommit *lcp = &u->layoutcommit; 1691 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1692 struct svc_fh *current_fh = &cstate->current_fh; 1693 const struct nfsd4_layout_ops *ops; 1694 loff_t new_size = lcp->lc_last_wr + 1; 1695 struct inode *inode; 1696 struct nfs4_layout_stateid *ls; 1697 __be32 nfserr; 1698 1699 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 1700 if (nfserr) 1701 goto out; 1702 1703 nfserr = nfserr_layoutunavailable; 1704 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 1705 if (!ops) 1706 goto out; 1707 inode = d_inode(current_fh->fh_dentry); 1708 1709 nfserr = nfserr_inval; 1710 if (new_size <= seg->offset) { 1711 dprintk("pnfsd: last write before layout segment\n"); 1712 goto out; 1713 } 1714 if (new_size > seg->offset + seg->length) { 1715 dprintk("pnfsd: last write beyond layout segment\n"); 1716 goto out; 1717 } 1718 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 1719 dprintk("pnfsd: layoutcommit beyond EOF\n"); 1720 goto out; 1721 } 1722 1723 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 1724 false, lcp->lc_layout_type, 1725 &ls); 1726 if (nfserr) { 1727 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid); 1728 /* fixup error code as per RFC5661 */ 1729 if (nfserr == nfserr_bad_stateid) 1730 nfserr = nfserr_badlayout; 1731 goto out; 1732 } 1733 1734 /* LAYOUTCOMMIT does not require any serialization */ 1735 mutex_unlock(&ls->ls_mutex); 1736 1737 if (new_size > i_size_read(inode)) { 1738 lcp->lc_size_chg = 1; 1739 lcp->lc_newsize = new_size; 1740 } else { 1741 lcp->lc_size_chg = 0; 1742 } 1743 1744 nfserr = ops->proc_layoutcommit(inode, lcp); 1745 nfs4_put_stid(&ls->ls_stid); 1746 out: 1747 return nfserr; 1748 } 1749 1750 static __be32 1751 nfsd4_layoutreturn(struct svc_rqst *rqstp, 1752 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1753 { 1754 struct nfsd4_layoutreturn *lrp = &u->layoutreturn; 1755 struct svc_fh *current_fh = &cstate->current_fh; 1756 __be32 nfserr; 1757 1758 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 1759 if (nfserr) 1760 goto out; 1761 1762 nfserr = nfserr_layoutunavailable; 1763 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 1764 goto out; 1765 1766 switch (lrp->lr_seg.iomode) { 1767 case IOMODE_READ: 1768 case IOMODE_RW: 1769 case IOMODE_ANY: 1770 break; 1771 default: 1772 dprintk("%s: invalid iomode %d\n", __func__, 1773 lrp->lr_seg.iomode); 1774 nfserr = nfserr_inval; 1775 goto out; 1776 } 1777 1778 switch (lrp->lr_return_type) { 1779 case RETURN_FILE: 1780 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 1781 break; 1782 case RETURN_FSID: 1783 case RETURN_ALL: 1784 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 1785 break; 1786 default: 1787 dprintk("%s: invalid return_type %d\n", __func__, 1788 lrp->lr_return_type); 1789 nfserr = nfserr_inval; 1790 break; 1791 } 1792 out: 1793 return nfserr; 1794 } 1795 #endif /* CONFIG_NFSD_PNFS */ 1796 1797 /* 1798 * NULL call. 1799 */ 1800 static __be32 1801 nfsd4_proc_null(struct svc_rqst *rqstp) 1802 { 1803 return nfs_ok; 1804 } 1805 1806 static inline void nfsd4_increment_op_stats(u32 opnum) 1807 { 1808 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1809 nfsdstats.nfs4_opcount[opnum]++; 1810 } 1811 1812 static const struct nfsd4_operation nfsd4_ops[]; 1813 1814 static const char *nfsd4_op_name(unsigned opnum); 1815 1816 /* 1817 * Enforce NFSv4.1 COMPOUND ordering rules: 1818 * 1819 * Also note, enforced elsewhere: 1820 * - SEQUENCE other than as first op results in 1821 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1822 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1823 * (Enforced in nfsd4_bind_conn_to_session().) 1824 * - DESTROY_SESSION must be the final operation in a compound, if 1825 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1826 * (Enforced in nfsd4_destroy_session().) 1827 */ 1828 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1829 { 1830 struct nfsd4_op *first_op = &args->ops[0]; 1831 1832 /* These ordering requirements don't apply to NFSv4.0: */ 1833 if (args->minorversion == 0) 1834 return nfs_ok; 1835 /* This is weird, but OK, not our problem: */ 1836 if (args->opcnt == 0) 1837 return nfs_ok; 1838 if (first_op->status == nfserr_op_illegal) 1839 return nfs_ok; 1840 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1841 return nfserr_op_not_in_session; 1842 if (first_op->opnum == OP_SEQUENCE) 1843 return nfs_ok; 1844 /* 1845 * So first_op is something allowed outside a session, like 1846 * EXCHANGE_ID; but then it has to be the only op in the 1847 * compound: 1848 */ 1849 if (args->opcnt != 1) 1850 return nfserr_not_only_op; 1851 return nfs_ok; 1852 } 1853 1854 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1855 { 1856 return &nfsd4_ops[op->opnum]; 1857 } 1858 1859 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1860 { 1861 if (op->opnum == OP_ILLEGAL) 1862 return false; 1863 return OPDESC(op)->op_flags & OP_CACHEME; 1864 } 1865 1866 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1867 { 1868 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1869 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1870 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1871 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1872 const struct nfsd4_operation *thisd = OPDESC(this); 1873 const struct nfsd4_operation *nextd; 1874 1875 /* 1876 * Most ops check wronsec on our own; only the putfh-like ops 1877 * have special rules. 1878 */ 1879 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1880 return false; 1881 /* 1882 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1883 * put-filehandle operation if we're not going to use the 1884 * result: 1885 */ 1886 if (argp->opcnt == resp->opcnt) 1887 return false; 1888 if (next->opnum == OP_ILLEGAL) 1889 return false; 1890 nextd = OPDESC(next); 1891 /* 1892 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1893 * errors themselves as necessary; others should check for them 1894 * now: 1895 */ 1896 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1897 } 1898 1899 static void svcxdr_init_encode(struct svc_rqst *rqstp, 1900 struct nfsd4_compoundres *resp) 1901 { 1902 struct xdr_stream *xdr = &resp->xdr; 1903 struct xdr_buf *buf = &rqstp->rq_res; 1904 struct kvec *head = buf->head; 1905 1906 xdr->buf = buf; 1907 xdr->iov = head; 1908 xdr->p = head->iov_base + head->iov_len; 1909 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1910 /* Tail and page_len should be zero at this point: */ 1911 buf->len = buf->head[0].iov_len; 1912 xdr->scratch.iov_len = 0; 1913 xdr->page_ptr = buf->pages - 1; 1914 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1915 - rqstp->rq_auth_slack; 1916 } 1917 1918 /* 1919 * COMPOUND call. 1920 */ 1921 static __be32 1922 nfsd4_proc_compound(struct svc_rqst *rqstp) 1923 { 1924 struct nfsd4_compoundargs *args = rqstp->rq_argp; 1925 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1926 struct nfsd4_op *op; 1927 struct nfsd4_compound_state *cstate = &resp->cstate; 1928 struct svc_fh *current_fh = &cstate->current_fh; 1929 struct svc_fh *save_fh = &cstate->save_fh; 1930 __be32 status; 1931 1932 svcxdr_init_encode(rqstp, resp); 1933 resp->tagp = resp->xdr.p; 1934 /* reserve space for: taglen, tag, and opcnt */ 1935 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1936 resp->taglen = args->taglen; 1937 resp->tag = args->tag; 1938 resp->rqstp = rqstp; 1939 cstate->minorversion = args->minorversion; 1940 fh_init(current_fh, NFS4_FHSIZE); 1941 fh_init(save_fh, NFS4_FHSIZE); 1942 /* 1943 * Don't use the deferral mechanism for NFSv4; compounds make it 1944 * too hard to avoid non-idempotency problems. 1945 */ 1946 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1947 1948 /* 1949 * According to RFC3010, this takes precedence over all other errors. 1950 */ 1951 status = nfserr_minor_vers_mismatch; 1952 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1953 goto out; 1954 status = nfserr_resource; 1955 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND) 1956 goto out; 1957 1958 status = nfs41_check_op_ordering(args); 1959 if (status) { 1960 op = &args->ops[0]; 1961 op->status = status; 1962 resp->opcnt = 1; 1963 goto encode_op; 1964 } 1965 1966 trace_nfsd_compound(rqstp, args->opcnt); 1967 while (!status && resp->opcnt < args->opcnt) { 1968 op = &args->ops[resp->opcnt++]; 1969 1970 /* 1971 * The XDR decode routines may have pre-set op->status; 1972 * for example, if there is a miscellaneous XDR error 1973 * it will be set to nfserr_bad_xdr. 1974 */ 1975 if (op->status) { 1976 if (op->opnum == OP_OPEN) 1977 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1978 goto encode_op; 1979 } 1980 1981 if (!current_fh->fh_dentry) { 1982 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1983 op->status = nfserr_nofilehandle; 1984 goto encode_op; 1985 } 1986 } else if (current_fh->fh_export->ex_fslocs.migrated && 1987 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1988 op->status = nfserr_moved; 1989 goto encode_op; 1990 } 1991 1992 fh_clear_wcc(current_fh); 1993 1994 /* If op is non-idempotent */ 1995 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1996 /* 1997 * Don't execute this op if we couldn't encode a 1998 * succesful reply: 1999 */ 2000 u32 plen = op->opdesc->op_rsize_bop(rqstp, op); 2001 /* 2002 * Plus if there's another operation, make sure 2003 * we'll have space to at least encode an error: 2004 */ 2005 if (resp->opcnt < args->opcnt) 2006 plen += COMPOUND_ERR_SLACK_SPACE; 2007 op->status = nfsd4_check_resp_size(resp, plen); 2008 } 2009 2010 if (op->status) 2011 goto encode_op; 2012 2013 if (op->opdesc->op_get_currentstateid) 2014 op->opdesc->op_get_currentstateid(cstate, &op->u); 2015 op->status = op->opdesc->op_func(rqstp, cstate, &op->u); 2016 2017 /* Only from SEQUENCE */ 2018 if (cstate->status == nfserr_replay_cache) { 2019 dprintk("%s NFS4.1 replay from cache\n", __func__); 2020 status = op->status; 2021 goto out; 2022 } 2023 if (!op->status) { 2024 if (op->opdesc->op_set_currentstateid) 2025 op->opdesc->op_set_currentstateid(cstate, &op->u); 2026 2027 if (op->opdesc->op_flags & OP_CLEAR_STATEID) 2028 clear_current_stateid(cstate); 2029 2030 if (need_wrongsec_check(rqstp)) 2031 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 2032 } 2033 encode_op: 2034 if (op->status == nfserr_replay_me) { 2035 op->replay = &cstate->replay_owner->so_replay; 2036 nfsd4_encode_replay(&resp->xdr, op); 2037 status = op->status = op->replay->rp_status; 2038 } else { 2039 nfsd4_encode_operation(resp, op); 2040 status = op->status; 2041 } 2042 2043 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status, 2044 nfsd4_op_name(op->opnum)); 2045 2046 nfsd4_cstate_clear_replay(cstate); 2047 nfsd4_increment_op_stats(op->opnum); 2048 } 2049 2050 cstate->status = status; 2051 fh_put(current_fh); 2052 fh_put(save_fh); 2053 BUG_ON(cstate->replay_owner); 2054 out: 2055 /* Reset deferral mechanism for RPC deferrals */ 2056 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2057 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 2058 return status; 2059 } 2060 2061 #define op_encode_hdr_size (2) 2062 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 2063 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 2064 #define op_encode_change_info_maxsz (5) 2065 #define nfs4_fattr_bitmap_maxsz (4) 2066 2067 /* We'll fall back on returning no lockowner if run out of space: */ 2068 #define op_encode_lockowner_maxsz (0) 2069 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 2070 2071 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 2072 2073 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 2074 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 2075 op_encode_ace_maxsz) 2076 2077 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 2078 2079 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2080 { 2081 return (op_encode_hdr_size) * sizeof(__be32); 2082 } 2083 2084 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2085 { 2086 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 2087 } 2088 2089 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2090 { 2091 /* ac_supported, ac_resp_access */ 2092 return (op_encode_hdr_size + 2)* sizeof(__be32); 2093 } 2094 2095 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2096 { 2097 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 2098 } 2099 2100 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2101 { 2102 return (op_encode_hdr_size + op_encode_change_info_maxsz 2103 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2104 } 2105 2106 /* 2107 * Note since this is an idempotent operation we won't insist on failing 2108 * the op prematurely if the estimate is too large. We may turn off splice 2109 * reads unnecessarily. 2110 */ 2111 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 2112 struct nfsd4_op *op) 2113 { 2114 u32 *bmap = op->u.getattr.ga_bmval; 2115 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 2116 u32 ret = 0; 2117 2118 if (bmap0 & FATTR4_WORD0_ACL) 2119 return svc_max_payload(rqstp); 2120 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 2121 return svc_max_payload(rqstp); 2122 2123 if (bmap1 & FATTR4_WORD1_OWNER) { 2124 ret += IDMAP_NAMESZ + 4; 2125 bmap1 &= ~FATTR4_WORD1_OWNER; 2126 } 2127 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 2128 ret += IDMAP_NAMESZ + 4; 2129 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 2130 } 2131 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 2132 ret += NFS4_FHSIZE + 4; 2133 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 2134 } 2135 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 2136 ret += NFS4_MAXLABELLEN + 12; 2137 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2138 } 2139 /* 2140 * Largest of remaining attributes are 16 bytes (e.g., 2141 * supported_attributes) 2142 */ 2143 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 2144 /* bitmask, length */ 2145 ret += 20; 2146 return ret; 2147 } 2148 2149 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2150 { 2151 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE; 2152 } 2153 2154 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2155 { 2156 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2157 * sizeof(__be32); 2158 } 2159 2160 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2161 { 2162 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 2163 * sizeof(__be32); 2164 } 2165 2166 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2167 { 2168 return (op_encode_hdr_size + op_encode_stateid_maxsz 2169 + op_encode_change_info_maxsz + 1 2170 + nfs4_fattr_bitmap_maxsz 2171 + op_encode_delegation_maxsz) * sizeof(__be32); 2172 } 2173 2174 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2175 { 2176 u32 maxcount = 0, rlen = 0; 2177 2178 maxcount = svc_max_payload(rqstp); 2179 rlen = min(op->u.read.rd_length, maxcount); 2180 2181 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2182 } 2183 2184 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2185 { 2186 u32 maxcount = 0, rlen = 0; 2187 2188 maxcount = svc_max_payload(rqstp); 2189 rlen = min(op->u.readdir.rd_maxcount, maxcount); 2190 2191 return (op_encode_hdr_size + op_encode_verifier_maxsz + 2192 XDR_QUADLEN(rlen)) * sizeof(__be32); 2193 } 2194 2195 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2196 { 2197 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE; 2198 } 2199 2200 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2201 { 2202 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2203 * sizeof(__be32); 2204 } 2205 2206 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2207 { 2208 return (op_encode_hdr_size + op_encode_change_info_maxsz 2209 + op_encode_change_info_maxsz) * sizeof(__be32); 2210 } 2211 2212 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 2213 struct nfsd4_op *op) 2214 { 2215 return (op_encode_hdr_size 2216 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 2217 } 2218 2219 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2220 { 2221 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids) 2222 * sizeof(__be32); 2223 } 2224 2225 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2226 { 2227 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2228 } 2229 2230 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2231 { 2232 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR * 2233 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32); 2234 } 2235 2236 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2237 { 2238 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 2239 sizeof(__be32); 2240 } 2241 2242 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2243 { 2244 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 2245 } 2246 2247 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2248 { 2249 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 2250 1 + 1 + /* eir_flags, spr_how */\ 2251 4 + /* spo_must_enforce & _allow with bitmap */\ 2252 2 + /*eir_server_owner.so_minor_id */\ 2253 /* eir_server_owner.so_major_id<> */\ 2254 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2255 /* eir_server_scope<> */\ 2256 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2257 1 + /* eir_server_impl_id array length */\ 2258 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 2259 } 2260 2261 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2262 { 2263 return (op_encode_hdr_size + \ 2264 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 2265 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 2266 } 2267 2268 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2269 { 2270 return (op_encode_hdr_size + \ 2271 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 2272 2 + /* csr_sequence, csr_flags */\ 2273 op_encode_channel_attrs_maxsz + \ 2274 op_encode_channel_attrs_maxsz) * sizeof(__be32); 2275 } 2276 2277 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2278 { 2279 return (op_encode_hdr_size + 2280 1 /* wr_callback */ + 2281 op_encode_stateid_maxsz /* wr_callback */ + 2282 2 /* wr_count */ + 2283 1 /* wr_committed */ + 2284 op_encode_verifier_maxsz + 2285 1 /* cr_consecutive */ + 2286 1 /* cr_synchronous */) * sizeof(__be32); 2287 } 2288 2289 static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp, 2290 struct nfsd4_op *op) 2291 { 2292 return (op_encode_hdr_size + 2293 2 /* osr_count */ + 2294 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32); 2295 } 2296 2297 #ifdef CONFIG_NFSD_PNFS 2298 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2299 { 2300 u32 maxcount = 0, rlen = 0; 2301 2302 maxcount = svc_max_payload(rqstp); 2303 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount); 2304 2305 return (op_encode_hdr_size + 2306 1 /* gd_layout_type*/ + 2307 XDR_QUADLEN(rlen) + 2308 2 /* gd_notify_types */) * sizeof(__be32); 2309 } 2310 2311 /* 2312 * At this stage we don't really know what layout driver will handle the request, 2313 * so we need to define an arbitrary upper bound here. 2314 */ 2315 #define MAX_LAYOUT_SIZE 128 2316 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2317 { 2318 return (op_encode_hdr_size + 2319 1 /* logr_return_on_close */ + 2320 op_encode_stateid_maxsz + 2321 1 /* nr of layouts */ + 2322 MAX_LAYOUT_SIZE) * sizeof(__be32); 2323 } 2324 2325 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2326 { 2327 return (op_encode_hdr_size + 2328 1 /* locr_newsize */ + 2329 2 /* ns_size */) * sizeof(__be32); 2330 } 2331 2332 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2333 { 2334 return (op_encode_hdr_size + 2335 1 /* lrs_stateid */ + 2336 op_encode_stateid_maxsz) * sizeof(__be32); 2337 } 2338 #endif /* CONFIG_NFSD_PNFS */ 2339 2340 2341 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2342 { 2343 return (op_encode_hdr_size + 3) * sizeof(__be32); 2344 } 2345 2346 static const struct nfsd4_operation nfsd4_ops[] = { 2347 [OP_ACCESS] = { 2348 .op_func = nfsd4_access, 2349 .op_name = "OP_ACCESS", 2350 .op_rsize_bop = nfsd4_access_rsize, 2351 }, 2352 [OP_CLOSE] = { 2353 .op_func = nfsd4_close, 2354 .op_flags = OP_MODIFIES_SOMETHING, 2355 .op_name = "OP_CLOSE", 2356 .op_rsize_bop = nfsd4_status_stateid_rsize, 2357 .op_get_currentstateid = nfsd4_get_closestateid, 2358 .op_set_currentstateid = nfsd4_set_closestateid, 2359 }, 2360 [OP_COMMIT] = { 2361 .op_func = nfsd4_commit, 2362 .op_flags = OP_MODIFIES_SOMETHING, 2363 .op_name = "OP_COMMIT", 2364 .op_rsize_bop = nfsd4_commit_rsize, 2365 }, 2366 [OP_CREATE] = { 2367 .op_func = nfsd4_create, 2368 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2369 .op_name = "OP_CREATE", 2370 .op_rsize_bop = nfsd4_create_rsize, 2371 }, 2372 [OP_DELEGRETURN] = { 2373 .op_func = nfsd4_delegreturn, 2374 .op_flags = OP_MODIFIES_SOMETHING, 2375 .op_name = "OP_DELEGRETURN", 2376 .op_rsize_bop = nfsd4_only_status_rsize, 2377 .op_get_currentstateid = nfsd4_get_delegreturnstateid, 2378 }, 2379 [OP_GETATTR] = { 2380 .op_func = nfsd4_getattr, 2381 .op_flags = ALLOWED_ON_ABSENT_FS, 2382 .op_rsize_bop = nfsd4_getattr_rsize, 2383 .op_name = "OP_GETATTR", 2384 }, 2385 [OP_GETFH] = { 2386 .op_func = nfsd4_getfh, 2387 .op_name = "OP_GETFH", 2388 .op_rsize_bop = nfsd4_getfh_rsize, 2389 }, 2390 [OP_LINK] = { 2391 .op_func = nfsd4_link, 2392 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2393 | OP_CACHEME, 2394 .op_name = "OP_LINK", 2395 .op_rsize_bop = nfsd4_link_rsize, 2396 }, 2397 [OP_LOCK] = { 2398 .op_func = nfsd4_lock, 2399 .op_flags = OP_MODIFIES_SOMETHING | 2400 OP_NONTRIVIAL_ERROR_ENCODE, 2401 .op_name = "OP_LOCK", 2402 .op_rsize_bop = nfsd4_lock_rsize, 2403 .op_set_currentstateid = nfsd4_set_lockstateid, 2404 }, 2405 [OP_LOCKT] = { 2406 .op_func = nfsd4_lockt, 2407 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE, 2408 .op_name = "OP_LOCKT", 2409 .op_rsize_bop = nfsd4_lock_rsize, 2410 }, 2411 [OP_LOCKU] = { 2412 .op_func = nfsd4_locku, 2413 .op_flags = OP_MODIFIES_SOMETHING, 2414 .op_name = "OP_LOCKU", 2415 .op_rsize_bop = nfsd4_status_stateid_rsize, 2416 .op_get_currentstateid = nfsd4_get_lockustateid, 2417 }, 2418 [OP_LOOKUP] = { 2419 .op_func = nfsd4_lookup, 2420 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2421 .op_name = "OP_LOOKUP", 2422 .op_rsize_bop = nfsd4_only_status_rsize, 2423 }, 2424 [OP_LOOKUPP] = { 2425 .op_func = nfsd4_lookupp, 2426 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2427 .op_name = "OP_LOOKUPP", 2428 .op_rsize_bop = nfsd4_only_status_rsize, 2429 }, 2430 [OP_NVERIFY] = { 2431 .op_func = nfsd4_nverify, 2432 .op_name = "OP_NVERIFY", 2433 .op_rsize_bop = nfsd4_only_status_rsize, 2434 }, 2435 [OP_OPEN] = { 2436 .op_func = nfsd4_open, 2437 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2438 .op_name = "OP_OPEN", 2439 .op_rsize_bop = nfsd4_open_rsize, 2440 .op_set_currentstateid = nfsd4_set_openstateid, 2441 }, 2442 [OP_OPEN_CONFIRM] = { 2443 .op_func = nfsd4_open_confirm, 2444 .op_flags = OP_MODIFIES_SOMETHING, 2445 .op_name = "OP_OPEN_CONFIRM", 2446 .op_rsize_bop = nfsd4_status_stateid_rsize, 2447 }, 2448 [OP_OPEN_DOWNGRADE] = { 2449 .op_func = nfsd4_open_downgrade, 2450 .op_flags = OP_MODIFIES_SOMETHING, 2451 .op_name = "OP_OPEN_DOWNGRADE", 2452 .op_rsize_bop = nfsd4_status_stateid_rsize, 2453 .op_get_currentstateid = nfsd4_get_opendowngradestateid, 2454 .op_set_currentstateid = nfsd4_set_opendowngradestateid, 2455 }, 2456 [OP_PUTFH] = { 2457 .op_func = nfsd4_putfh, 2458 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2459 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2460 .op_name = "OP_PUTFH", 2461 .op_rsize_bop = nfsd4_only_status_rsize, 2462 }, 2463 [OP_PUTPUBFH] = { 2464 .op_func = nfsd4_putrootfh, 2465 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2466 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2467 .op_name = "OP_PUTPUBFH", 2468 .op_rsize_bop = nfsd4_only_status_rsize, 2469 }, 2470 [OP_PUTROOTFH] = { 2471 .op_func = nfsd4_putrootfh, 2472 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2473 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2474 .op_name = "OP_PUTROOTFH", 2475 .op_rsize_bop = nfsd4_only_status_rsize, 2476 }, 2477 [OP_READ] = { 2478 .op_func = nfsd4_read, 2479 .op_release = nfsd4_read_release, 2480 .op_name = "OP_READ", 2481 .op_rsize_bop = nfsd4_read_rsize, 2482 .op_get_currentstateid = nfsd4_get_readstateid, 2483 }, 2484 [OP_READDIR] = { 2485 .op_func = nfsd4_readdir, 2486 .op_name = "OP_READDIR", 2487 .op_rsize_bop = nfsd4_readdir_rsize, 2488 }, 2489 [OP_READLINK] = { 2490 .op_func = nfsd4_readlink, 2491 .op_name = "OP_READLINK", 2492 .op_rsize_bop = nfsd4_readlink_rsize, 2493 }, 2494 [OP_REMOVE] = { 2495 .op_func = nfsd4_remove, 2496 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2497 .op_name = "OP_REMOVE", 2498 .op_rsize_bop = nfsd4_remove_rsize, 2499 }, 2500 [OP_RENAME] = { 2501 .op_func = nfsd4_rename, 2502 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2503 .op_name = "OP_RENAME", 2504 .op_rsize_bop = nfsd4_rename_rsize, 2505 }, 2506 [OP_RENEW] = { 2507 .op_func = nfsd4_renew, 2508 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2509 | OP_MODIFIES_SOMETHING, 2510 .op_name = "OP_RENEW", 2511 .op_rsize_bop = nfsd4_only_status_rsize, 2512 2513 }, 2514 [OP_RESTOREFH] = { 2515 .op_func = nfsd4_restorefh, 2516 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2517 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2518 .op_name = "OP_RESTOREFH", 2519 .op_rsize_bop = nfsd4_only_status_rsize, 2520 }, 2521 [OP_SAVEFH] = { 2522 .op_func = nfsd4_savefh, 2523 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2524 .op_name = "OP_SAVEFH", 2525 .op_rsize_bop = nfsd4_only_status_rsize, 2526 }, 2527 [OP_SECINFO] = { 2528 .op_func = nfsd4_secinfo, 2529 .op_release = nfsd4_secinfo_release, 2530 .op_flags = OP_HANDLES_WRONGSEC, 2531 .op_name = "OP_SECINFO", 2532 .op_rsize_bop = nfsd4_secinfo_rsize, 2533 }, 2534 [OP_SETATTR] = { 2535 .op_func = nfsd4_setattr, 2536 .op_name = "OP_SETATTR", 2537 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME 2538 | OP_NONTRIVIAL_ERROR_ENCODE, 2539 .op_rsize_bop = nfsd4_setattr_rsize, 2540 .op_get_currentstateid = nfsd4_get_setattrstateid, 2541 }, 2542 [OP_SETCLIENTID] = { 2543 .op_func = nfsd4_setclientid, 2544 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2545 | OP_MODIFIES_SOMETHING | OP_CACHEME 2546 | OP_NONTRIVIAL_ERROR_ENCODE, 2547 .op_name = "OP_SETCLIENTID", 2548 .op_rsize_bop = nfsd4_setclientid_rsize, 2549 }, 2550 [OP_SETCLIENTID_CONFIRM] = { 2551 .op_func = nfsd4_setclientid_confirm, 2552 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2553 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2554 .op_name = "OP_SETCLIENTID_CONFIRM", 2555 .op_rsize_bop = nfsd4_only_status_rsize, 2556 }, 2557 [OP_VERIFY] = { 2558 .op_func = nfsd4_verify, 2559 .op_name = "OP_VERIFY", 2560 .op_rsize_bop = nfsd4_only_status_rsize, 2561 }, 2562 [OP_WRITE] = { 2563 .op_func = nfsd4_write, 2564 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2565 .op_name = "OP_WRITE", 2566 .op_rsize_bop = nfsd4_write_rsize, 2567 .op_get_currentstateid = nfsd4_get_writestateid, 2568 }, 2569 [OP_RELEASE_LOCKOWNER] = { 2570 .op_func = nfsd4_release_lockowner, 2571 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2572 | OP_MODIFIES_SOMETHING, 2573 .op_name = "OP_RELEASE_LOCKOWNER", 2574 .op_rsize_bop = nfsd4_only_status_rsize, 2575 }, 2576 2577 /* NFSv4.1 operations */ 2578 [OP_EXCHANGE_ID] = { 2579 .op_func = nfsd4_exchange_id, 2580 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2581 | OP_MODIFIES_SOMETHING, 2582 .op_name = "OP_EXCHANGE_ID", 2583 .op_rsize_bop = nfsd4_exchange_id_rsize, 2584 }, 2585 [OP_BACKCHANNEL_CTL] = { 2586 .op_func = nfsd4_backchannel_ctl, 2587 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2588 .op_name = "OP_BACKCHANNEL_CTL", 2589 .op_rsize_bop = nfsd4_only_status_rsize, 2590 }, 2591 [OP_BIND_CONN_TO_SESSION] = { 2592 .op_func = nfsd4_bind_conn_to_session, 2593 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2594 | OP_MODIFIES_SOMETHING, 2595 .op_name = "OP_BIND_CONN_TO_SESSION", 2596 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize, 2597 }, 2598 [OP_CREATE_SESSION] = { 2599 .op_func = nfsd4_create_session, 2600 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2601 | OP_MODIFIES_SOMETHING, 2602 .op_name = "OP_CREATE_SESSION", 2603 .op_rsize_bop = nfsd4_create_session_rsize, 2604 }, 2605 [OP_DESTROY_SESSION] = { 2606 .op_func = nfsd4_destroy_session, 2607 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2608 | OP_MODIFIES_SOMETHING, 2609 .op_name = "OP_DESTROY_SESSION", 2610 .op_rsize_bop = nfsd4_only_status_rsize, 2611 }, 2612 [OP_SEQUENCE] = { 2613 .op_func = nfsd4_sequence, 2614 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 2615 .op_name = "OP_SEQUENCE", 2616 .op_rsize_bop = nfsd4_sequence_rsize, 2617 }, 2618 [OP_DESTROY_CLIENTID] = { 2619 .op_func = nfsd4_destroy_clientid, 2620 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2621 | OP_MODIFIES_SOMETHING, 2622 .op_name = "OP_DESTROY_CLIENTID", 2623 .op_rsize_bop = nfsd4_only_status_rsize, 2624 }, 2625 [OP_RECLAIM_COMPLETE] = { 2626 .op_func = nfsd4_reclaim_complete, 2627 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2628 .op_name = "OP_RECLAIM_COMPLETE", 2629 .op_rsize_bop = nfsd4_only_status_rsize, 2630 }, 2631 [OP_SECINFO_NO_NAME] = { 2632 .op_func = nfsd4_secinfo_no_name, 2633 .op_release = nfsd4_secinfo_no_name_release, 2634 .op_flags = OP_HANDLES_WRONGSEC, 2635 .op_name = "OP_SECINFO_NO_NAME", 2636 .op_rsize_bop = nfsd4_secinfo_rsize, 2637 }, 2638 [OP_TEST_STATEID] = { 2639 .op_func = nfsd4_test_stateid, 2640 .op_flags = ALLOWED_WITHOUT_FH, 2641 .op_name = "OP_TEST_STATEID", 2642 .op_rsize_bop = nfsd4_test_stateid_rsize, 2643 }, 2644 [OP_FREE_STATEID] = { 2645 .op_func = nfsd4_free_stateid, 2646 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2647 .op_name = "OP_FREE_STATEID", 2648 .op_get_currentstateid = nfsd4_get_freestateid, 2649 .op_rsize_bop = nfsd4_only_status_rsize, 2650 }, 2651 #ifdef CONFIG_NFSD_PNFS 2652 [OP_GETDEVICEINFO] = { 2653 .op_func = nfsd4_getdeviceinfo, 2654 .op_release = nfsd4_getdeviceinfo_release, 2655 .op_flags = ALLOWED_WITHOUT_FH, 2656 .op_name = "OP_GETDEVICEINFO", 2657 .op_rsize_bop = nfsd4_getdeviceinfo_rsize, 2658 }, 2659 [OP_LAYOUTGET] = { 2660 .op_func = nfsd4_layoutget, 2661 .op_release = nfsd4_layoutget_release, 2662 .op_flags = OP_MODIFIES_SOMETHING, 2663 .op_name = "OP_LAYOUTGET", 2664 .op_rsize_bop = nfsd4_layoutget_rsize, 2665 }, 2666 [OP_LAYOUTCOMMIT] = { 2667 .op_func = nfsd4_layoutcommit, 2668 .op_flags = OP_MODIFIES_SOMETHING, 2669 .op_name = "OP_LAYOUTCOMMIT", 2670 .op_rsize_bop = nfsd4_layoutcommit_rsize, 2671 }, 2672 [OP_LAYOUTRETURN] = { 2673 .op_func = nfsd4_layoutreturn, 2674 .op_flags = OP_MODIFIES_SOMETHING, 2675 .op_name = "OP_LAYOUTRETURN", 2676 .op_rsize_bop = nfsd4_layoutreturn_rsize, 2677 }, 2678 #endif /* CONFIG_NFSD_PNFS */ 2679 2680 /* NFSv4.2 operations */ 2681 [OP_ALLOCATE] = { 2682 .op_func = nfsd4_allocate, 2683 .op_flags = OP_MODIFIES_SOMETHING, 2684 .op_name = "OP_ALLOCATE", 2685 .op_rsize_bop = nfsd4_only_status_rsize, 2686 }, 2687 [OP_DEALLOCATE] = { 2688 .op_func = nfsd4_deallocate, 2689 .op_flags = OP_MODIFIES_SOMETHING, 2690 .op_name = "OP_DEALLOCATE", 2691 .op_rsize_bop = nfsd4_only_status_rsize, 2692 }, 2693 [OP_CLONE] = { 2694 .op_func = nfsd4_clone, 2695 .op_flags = OP_MODIFIES_SOMETHING, 2696 .op_name = "OP_CLONE", 2697 .op_rsize_bop = nfsd4_only_status_rsize, 2698 }, 2699 [OP_COPY] = { 2700 .op_func = nfsd4_copy, 2701 .op_flags = OP_MODIFIES_SOMETHING, 2702 .op_name = "OP_COPY", 2703 .op_rsize_bop = nfsd4_copy_rsize, 2704 }, 2705 [OP_SEEK] = { 2706 .op_func = nfsd4_seek, 2707 .op_name = "OP_SEEK", 2708 .op_rsize_bop = nfsd4_seek_rsize, 2709 }, 2710 [OP_OFFLOAD_STATUS] = { 2711 .op_func = nfsd4_offload_status, 2712 .op_name = "OP_OFFLOAD_STATUS", 2713 .op_rsize_bop = nfsd4_offload_status_rsize, 2714 }, 2715 [OP_OFFLOAD_CANCEL] = { 2716 .op_func = nfsd4_offload_cancel, 2717 .op_flags = OP_MODIFIES_SOMETHING, 2718 .op_name = "OP_OFFLOAD_CANCEL", 2719 .op_rsize_bop = nfsd4_only_status_rsize, 2720 }, 2721 }; 2722 2723 /** 2724 * nfsd4_spo_must_allow - Determine if the compound op contains an 2725 * operation that is allowed to be sent with machine credentials 2726 * 2727 * @rqstp: a pointer to the struct svc_rqst 2728 * 2729 * Checks to see if the compound contains a spo_must_allow op 2730 * and confirms that it was sent with the proper machine creds. 2731 */ 2732 2733 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 2734 { 2735 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2736 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2737 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2738 struct nfsd4_compound_state *cstate = &resp->cstate; 2739 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 2740 u32 opiter; 2741 2742 if (!cstate->minorversion) 2743 return false; 2744 2745 if (cstate->spo_must_allowed == true) 2746 return true; 2747 2748 opiter = resp->opcnt; 2749 while (opiter < argp->opcnt) { 2750 this = &argp->ops[opiter++]; 2751 if (test_bit(this->opnum, allow->u.longs) && 2752 cstate->clp->cl_mach_cred && 2753 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 2754 cstate->spo_must_allowed = true; 2755 return true; 2756 } 2757 } 2758 cstate->spo_must_allowed = false; 2759 return false; 2760 } 2761 2762 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 2763 { 2764 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp) 2765 return op_encode_hdr_size * sizeof(__be32); 2766 2767 BUG_ON(OPDESC(op)->op_rsize_bop == NULL); 2768 return OPDESC(op)->op_rsize_bop(rqstp, op); 2769 } 2770 2771 void warn_on_nonidempotent_op(struct nfsd4_op *op) 2772 { 2773 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 2774 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 2775 op->opnum, nfsd4_op_name(op->opnum)); 2776 WARN_ON_ONCE(1); 2777 } 2778 } 2779 2780 static const char *nfsd4_op_name(unsigned opnum) 2781 { 2782 if (opnum < ARRAY_SIZE(nfsd4_ops)) 2783 return nfsd4_ops[opnum].op_name; 2784 return "unknown_operation"; 2785 } 2786 2787 #define nfsd4_voidres nfsd4_voidargs 2788 struct nfsd4_voidargs { int dummy; }; 2789 2790 static const struct svc_procedure nfsd_procedures4[2] = { 2791 [NFSPROC4_NULL] = { 2792 .pc_func = nfsd4_proc_null, 2793 .pc_encode = nfs4svc_encode_voidres, 2794 .pc_argsize = sizeof(struct nfsd4_voidargs), 2795 .pc_ressize = sizeof(struct nfsd4_voidres), 2796 .pc_cachetype = RC_NOCACHE, 2797 .pc_xdrressize = 1, 2798 }, 2799 [NFSPROC4_COMPOUND] = { 2800 .pc_func = nfsd4_proc_compound, 2801 .pc_decode = nfs4svc_decode_compoundargs, 2802 .pc_encode = nfs4svc_encode_compoundres, 2803 .pc_argsize = sizeof(struct nfsd4_compoundargs), 2804 .pc_ressize = sizeof(struct nfsd4_compoundres), 2805 .pc_release = nfsd4_release_compoundargs, 2806 .pc_cachetype = RC_NOCACHE, 2807 .pc_xdrressize = NFSD_BUFSIZE/4, 2808 }, 2809 }; 2810 2811 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)]; 2812 const struct svc_version nfsd_version4 = { 2813 .vs_vers = 4, 2814 .vs_nproc = 2, 2815 .vs_proc = nfsd_procedures4, 2816 .vs_count = nfsd_count3, 2817 .vs_dispatch = nfsd_dispatch, 2818 .vs_xdrsize = NFS4_SVC_XDRSIZE, 2819 .vs_rpcb_optnl = true, 2820 .vs_need_cong_ctrl = true, 2821 }; 2822 2823 /* 2824 * Local variables: 2825 * c-basic-offset: 8 2826 * End: 2827 */ 2828