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 case NFS4_OPEN_CLAIM_FH: 431 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 432 status = do_open_fhandle(rqstp, cstate, open); 433 if (status) 434 goto out; 435 resfh = &cstate->current_fh; 436 break; 437 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 438 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 439 dprintk("NFSD: unsupported OPEN claim type %d\n", 440 open->op_claim_type); 441 status = nfserr_notsupp; 442 goto out; 443 default: 444 dprintk("NFSD: Invalid OPEN claim type %d\n", 445 open->op_claim_type); 446 status = nfserr_inval; 447 goto out; 448 } 449 /* 450 * nfsd4_process_open2() does the actual opening of the file. If 451 * successful, it (1) truncates the file if open->op_truncate was 452 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 453 */ 454 status = nfsd4_process_open2(rqstp, resfh, open); 455 WARN(status && open->op_created, 456 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 457 be32_to_cpu(status)); 458 if (reclaim && !status) 459 nn->somebody_reclaimed = true; 460 out: 461 if (resfh && resfh != &cstate->current_fh) { 462 fh_dup2(&cstate->current_fh, resfh); 463 fh_put(resfh); 464 kfree(resfh); 465 } 466 nfsd4_cleanup_open_state(cstate, open); 467 nfsd4_bump_seqid(cstate, status); 468 return status; 469 } 470 471 /* 472 * OPEN is the only seqid-mutating operation whose decoding can fail 473 * with a seqid-mutating error (specifically, decoding of user names in 474 * the attributes). Therefore we have to do some processing to look up 475 * the stateowner so that we can bump the seqid. 476 */ 477 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 478 { 479 struct nfsd4_open *open = &op->u.open; 480 481 if (!seqid_mutating_err(ntohl(op->status))) 482 return op->status; 483 if (nfsd4_has_session(cstate)) 484 return op->status; 485 open->op_xdr_error = op->status; 486 return nfsd4_open(rqstp, cstate, &op->u); 487 } 488 489 /* 490 * filehandle-manipulating ops. 491 */ 492 static __be32 493 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 494 union nfsd4_op_u *u) 495 { 496 u->getfh = &cstate->current_fh; 497 return nfs_ok; 498 } 499 500 static __be32 501 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 502 union nfsd4_op_u *u) 503 { 504 struct nfsd4_putfh *putfh = &u->putfh; 505 506 fh_put(&cstate->current_fh); 507 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 508 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 509 putfh->pf_fhlen); 510 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 511 } 512 513 static __be32 514 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 515 union nfsd4_op_u *u) 516 { 517 __be32 status; 518 519 fh_put(&cstate->current_fh); 520 status = exp_pseudoroot(rqstp, &cstate->current_fh); 521 return status; 522 } 523 524 static __be32 525 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 526 union nfsd4_op_u *u) 527 { 528 if (!cstate->save_fh.fh_dentry) 529 return nfserr_restorefh; 530 531 fh_dup2(&cstate->current_fh, &cstate->save_fh); 532 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 533 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 534 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 535 } 536 return nfs_ok; 537 } 538 539 static __be32 540 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 541 union nfsd4_op_u *u) 542 { 543 fh_dup2(&cstate->save_fh, &cstate->current_fh); 544 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 545 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 546 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 547 } 548 return nfs_ok; 549 } 550 551 /* 552 * misc nfsv4 ops 553 */ 554 static __be32 555 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 556 union nfsd4_op_u *u) 557 { 558 struct nfsd4_access *access = &u->access; 559 560 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 561 return nfserr_inval; 562 563 access->ac_resp_access = access->ac_req_access; 564 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 565 &access->ac_supported); 566 } 567 568 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 569 { 570 __be32 verf[2]; 571 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 572 573 /* 574 * This is opaque to client, so no need to byte-swap. Use 575 * __force to keep sparse happy. y2038 time_t overflow is 576 * irrelevant in this usage. 577 */ 578 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec; 579 verf[1] = (__force __be32)nn->nfssvc_boot.tv_nsec; 580 memcpy(verifier->data, verf, sizeof(verifier->data)); 581 } 582 583 static __be32 584 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 585 union nfsd4_op_u *u) 586 { 587 struct nfsd4_commit *commit = &u->commit; 588 589 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 590 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 591 commit->co_count); 592 } 593 594 static __be32 595 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 596 union nfsd4_op_u *u) 597 { 598 struct nfsd4_create *create = &u->create; 599 struct svc_fh resfh; 600 __be32 status; 601 dev_t rdev; 602 603 fh_init(&resfh, NFS4_FHSIZE); 604 605 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP); 606 if (status) 607 return status; 608 609 status = check_attr_support(rqstp, cstate, create->cr_bmval, 610 nfsd_attrmask); 611 if (status) 612 return status; 613 614 current->fs->umask = create->cr_umask; 615 switch (create->cr_type) { 616 case NF4LNK: 617 status = nfsd_symlink(rqstp, &cstate->current_fh, 618 create->cr_name, create->cr_namelen, 619 create->cr_data, &resfh); 620 break; 621 622 case NF4BLK: 623 status = nfserr_inval; 624 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 625 if (MAJOR(rdev) != create->cr_specdata1 || 626 MINOR(rdev) != create->cr_specdata2) 627 goto out_umask; 628 status = nfsd_create(rqstp, &cstate->current_fh, 629 create->cr_name, create->cr_namelen, 630 &create->cr_iattr, S_IFBLK, rdev, &resfh); 631 break; 632 633 case NF4CHR: 634 status = nfserr_inval; 635 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 636 if (MAJOR(rdev) != create->cr_specdata1 || 637 MINOR(rdev) != create->cr_specdata2) 638 goto out_umask; 639 status = nfsd_create(rqstp, &cstate->current_fh, 640 create->cr_name, create->cr_namelen, 641 &create->cr_iattr,S_IFCHR, rdev, &resfh); 642 break; 643 644 case NF4SOCK: 645 status = nfsd_create(rqstp, &cstate->current_fh, 646 create->cr_name, create->cr_namelen, 647 &create->cr_iattr, S_IFSOCK, 0, &resfh); 648 break; 649 650 case NF4FIFO: 651 status = nfsd_create(rqstp, &cstate->current_fh, 652 create->cr_name, create->cr_namelen, 653 &create->cr_iattr, S_IFIFO, 0, &resfh); 654 break; 655 656 case NF4DIR: 657 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 658 status = nfsd_create(rqstp, &cstate->current_fh, 659 create->cr_name, create->cr_namelen, 660 &create->cr_iattr, S_IFDIR, 0, &resfh); 661 break; 662 663 default: 664 status = nfserr_badtype; 665 } 666 667 if (status) 668 goto out; 669 670 if (create->cr_label.len) 671 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 672 673 if (create->cr_acl != NULL) 674 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 675 create->cr_bmval); 676 677 fh_unlock(&cstate->current_fh); 678 set_change_info(&create->cr_cinfo, &cstate->current_fh); 679 fh_dup2(&cstate->current_fh, &resfh); 680 out: 681 fh_put(&resfh); 682 out_umask: 683 current->fs->umask = 0; 684 return status; 685 } 686 687 static __be32 688 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 689 union nfsd4_op_u *u) 690 { 691 struct nfsd4_getattr *getattr = &u->getattr; 692 __be32 status; 693 694 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 695 if (status) 696 return status; 697 698 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 699 return nfserr_inval; 700 701 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 702 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 703 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 704 705 getattr->ga_fhp = &cstate->current_fh; 706 return nfs_ok; 707 } 708 709 static __be32 710 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 711 union nfsd4_op_u *u) 712 { 713 struct nfsd4_link *link = &u->link; 714 __be32 status; 715 716 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 union nfsd4_op_u *u) 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 union nfsd4_op_u *u) 750 { 751 return nfsd_lookup(rqstp, &cstate->current_fh, 752 u->lookup.lo_name, u->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 union nfsd4_op_u *u) 759 { 760 struct nfsd4_read *read = &u->read; 761 __be32 status; 762 763 read->rd_filp = NULL; 764 if (read->rd_offset >= OFFSET_MAX) 765 return nfserr_inval; 766 767 trace_nfsd_read_start(rqstp, &cstate->current_fh, 768 read->rd_offset, read->rd_length); 769 770 /* 771 * If we do a zero copy read, then a client will see read data 772 * that reflects the state of the file *after* performing the 773 * following compound. 774 * 775 * To ensure proper ordering, we therefore turn off zero copy if 776 * the client wants us to do more in this compound: 777 */ 778 if (!nfsd4_last_compound_op(rqstp)) 779 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 780 781 /* check stateid */ 782 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 783 &read->rd_stateid, RD_STATE, 784 &read->rd_filp, &read->rd_tmp_file); 785 if (status) { 786 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 787 goto out; 788 } 789 status = nfs_ok; 790 out: 791 read->rd_rqstp = rqstp; 792 read->rd_fhp = &cstate->current_fh; 793 return status; 794 } 795 796 797 static void 798 nfsd4_read_release(union nfsd4_op_u *u) 799 { 800 if (u->read.rd_filp) 801 fput(u->read.rd_filp); 802 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp, 803 u->read.rd_offset, u->read.rd_length); 804 } 805 806 static __be32 807 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 808 union nfsd4_op_u *u) 809 { 810 struct nfsd4_readdir *readdir = &u->readdir; 811 u64 cookie = readdir->rd_cookie; 812 static const nfs4_verifier zeroverf; 813 814 /* no need to check permission - this will be done in nfsd_readdir() */ 815 816 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 817 return nfserr_inval; 818 819 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 820 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 821 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 822 823 if ((cookie == 1) || (cookie == 2) || 824 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 825 return nfserr_bad_cookie; 826 827 readdir->rd_rqstp = rqstp; 828 readdir->rd_fhp = &cstate->current_fh; 829 return nfs_ok; 830 } 831 832 static __be32 833 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 834 union nfsd4_op_u *u) 835 { 836 u->readlink.rl_rqstp = rqstp; 837 u->readlink.rl_fhp = &cstate->current_fh; 838 return nfs_ok; 839 } 840 841 static __be32 842 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 843 union nfsd4_op_u *u) 844 { 845 struct nfsd4_remove *remove = &u->remove; 846 __be32 status; 847 848 if (opens_in_grace(SVC_NET(rqstp))) 849 return nfserr_grace; 850 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 851 remove->rm_name, remove->rm_namelen); 852 if (!status) { 853 fh_unlock(&cstate->current_fh); 854 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 855 } 856 return status; 857 } 858 859 static __be32 860 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 861 union nfsd4_op_u *u) 862 { 863 struct nfsd4_rename *rename = &u->rename; 864 __be32 status; 865 866 if (opens_in_grace(SVC_NET(rqstp)) && 867 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 868 return nfserr_grace; 869 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 870 rename->rn_snamelen, &cstate->current_fh, 871 rename->rn_tname, rename->rn_tnamelen); 872 if (status) 873 return status; 874 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 875 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 876 return nfs_ok; 877 } 878 879 static __be32 880 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 881 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 if (!nvecs) 1020 return nfserr_io; 1021 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1022 1023 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp, 1024 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 1025 write->wr_how_written); 1026 fput(filp); 1027 1028 write->wr_bytes_written = cnt; 1029 trace_nfsd_write_done(rqstp, &cstate->current_fh, 1030 write->wr_offset, cnt); 1031 return status; 1032 } 1033 1034 static __be32 1035 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1036 stateid_t *src_stateid, struct file **src, 1037 stateid_t *dst_stateid, struct file **dst) 1038 { 1039 __be32 status; 1040 1041 if (!cstate->save_fh.fh_dentry) 1042 return nfserr_nofilehandle; 1043 1044 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, 1045 src_stateid, RD_STATE, src, NULL); 1046 if (status) { 1047 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); 1048 goto out; 1049 } 1050 1051 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1052 dst_stateid, WR_STATE, dst, NULL); 1053 if (status) { 1054 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); 1055 goto out_put_src; 1056 } 1057 1058 /* fix up for NFS-specific error code */ 1059 if (!S_ISREG(file_inode(*src)->i_mode) || 1060 !S_ISREG(file_inode(*dst)->i_mode)) { 1061 status = nfserr_wrong_type; 1062 goto out_put_dst; 1063 } 1064 1065 out: 1066 return status; 1067 out_put_dst: 1068 fput(*dst); 1069 out_put_src: 1070 fput(*src); 1071 goto out; 1072 } 1073 1074 static __be32 1075 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1076 union nfsd4_op_u *u) 1077 { 1078 struct nfsd4_clone *clone = &u->clone; 1079 struct file *src, *dst; 1080 __be32 status; 1081 1082 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src, 1083 &clone->cl_dst_stateid, &dst); 1084 if (status) 1085 goto out; 1086 1087 status = nfsd4_clone_file_range(src, clone->cl_src_pos, 1088 dst, clone->cl_dst_pos, clone->cl_count); 1089 1090 fput(dst); 1091 fput(src); 1092 out: 1093 return status; 1094 } 1095 1096 void nfs4_put_copy(struct nfsd4_copy *copy) 1097 { 1098 if (!refcount_dec_and_test(©->refcount)) 1099 return; 1100 kfree(copy); 1101 } 1102 1103 static bool 1104 check_and_set_stop_copy(struct nfsd4_copy *copy) 1105 { 1106 bool value; 1107 1108 spin_lock(©->cp_clp->async_lock); 1109 value = copy->stopped; 1110 if (!copy->stopped) 1111 copy->stopped = true; 1112 spin_unlock(©->cp_clp->async_lock); 1113 return value; 1114 } 1115 1116 static void nfsd4_stop_copy(struct nfsd4_copy *copy) 1117 { 1118 /* only 1 thread should stop the copy */ 1119 if (!check_and_set_stop_copy(copy)) 1120 kthread_stop(copy->copy_task); 1121 nfs4_put_copy(copy); 1122 } 1123 1124 static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp) 1125 { 1126 struct nfsd4_copy *copy = NULL; 1127 1128 spin_lock(&clp->async_lock); 1129 if (!list_empty(&clp->async_copies)) { 1130 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy, 1131 copies); 1132 refcount_inc(©->refcount); 1133 } 1134 spin_unlock(&clp->async_lock); 1135 return copy; 1136 } 1137 1138 void nfsd4_shutdown_copy(struct nfs4_client *clp) 1139 { 1140 struct nfsd4_copy *copy; 1141 1142 while ((copy = nfsd4_get_copy(clp)) != NULL) 1143 nfsd4_stop_copy(copy); 1144 } 1145 1146 static void nfsd4_cb_offload_release(struct nfsd4_callback *cb) 1147 { 1148 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb); 1149 1150 nfs4_put_copy(copy); 1151 } 1152 1153 static int nfsd4_cb_offload_done(struct nfsd4_callback *cb, 1154 struct rpc_task *task) 1155 { 1156 return 1; 1157 } 1158 1159 static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = { 1160 .release = nfsd4_cb_offload_release, 1161 .done = nfsd4_cb_offload_done 1162 }; 1163 1164 static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync) 1165 { 1166 copy->cp_res.wr_stable_how = NFS_UNSTABLE; 1167 copy->cp_synchronous = sync; 1168 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net); 1169 } 1170 1171 static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy) 1172 { 1173 ssize_t bytes_copied = 0; 1174 size_t bytes_total = copy->cp_count; 1175 u64 src_pos = copy->cp_src_pos; 1176 u64 dst_pos = copy->cp_dst_pos; 1177 1178 do { 1179 if (kthread_should_stop()) 1180 break; 1181 bytes_copied = nfsd_copy_file_range(copy->file_src, src_pos, 1182 copy->file_dst, dst_pos, bytes_total); 1183 if (bytes_copied <= 0) 1184 break; 1185 bytes_total -= bytes_copied; 1186 copy->cp_res.wr_bytes_written += bytes_copied; 1187 src_pos += bytes_copied; 1188 dst_pos += bytes_copied; 1189 } while (bytes_total > 0 && !copy->cp_synchronous); 1190 return bytes_copied; 1191 } 1192 1193 static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync) 1194 { 1195 __be32 status; 1196 ssize_t bytes; 1197 1198 bytes = _nfsd_copy_file_range(copy); 1199 /* for async copy, we ignore the error, client can always retry 1200 * to get the error 1201 */ 1202 if (bytes < 0 && !copy->cp_res.wr_bytes_written) 1203 status = nfserrno(bytes); 1204 else { 1205 nfsd4_init_copy_res(copy, sync); 1206 status = nfs_ok; 1207 } 1208 1209 fput(copy->file_src); 1210 fput(copy->file_dst); 1211 return status; 1212 } 1213 1214 static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst) 1215 { 1216 dst->cp_src_pos = src->cp_src_pos; 1217 dst->cp_dst_pos = src->cp_dst_pos; 1218 dst->cp_count = src->cp_count; 1219 dst->cp_synchronous = src->cp_synchronous; 1220 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res)); 1221 memcpy(&dst->fh, &src->fh, sizeof(src->fh)); 1222 dst->cp_clp = src->cp_clp; 1223 dst->file_dst = get_file(src->file_dst); 1224 dst->file_src = get_file(src->file_src); 1225 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid)); 1226 } 1227 1228 static void cleanup_async_copy(struct nfsd4_copy *copy) 1229 { 1230 nfs4_free_cp_state(copy); 1231 fput(copy->file_dst); 1232 fput(copy->file_src); 1233 spin_lock(©->cp_clp->async_lock); 1234 list_del(©->copies); 1235 spin_unlock(©->cp_clp->async_lock); 1236 nfs4_put_copy(copy); 1237 } 1238 1239 static int nfsd4_do_async_copy(void *data) 1240 { 1241 struct nfsd4_copy *copy = (struct nfsd4_copy *)data; 1242 struct nfsd4_copy *cb_copy; 1243 1244 copy->nfserr = nfsd4_do_copy(copy, 0); 1245 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1246 if (!cb_copy) 1247 goto out; 1248 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res)); 1249 cb_copy->cp_clp = copy->cp_clp; 1250 cb_copy->nfserr = copy->nfserr; 1251 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh)); 1252 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp, 1253 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD); 1254 nfsd4_run_cb(&cb_copy->cp_cb); 1255 out: 1256 cleanup_async_copy(copy); 1257 return 0; 1258 } 1259 1260 static __be32 1261 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1262 union nfsd4_op_u *u) 1263 { 1264 struct nfsd4_copy *copy = &u->copy; 1265 __be32 status; 1266 struct nfsd4_copy *async_copy = NULL; 1267 1268 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, 1269 ©->file_src, ©->cp_dst_stateid, 1270 ©->file_dst); 1271 if (status) 1272 goto out; 1273 1274 copy->cp_clp = cstate->clp; 1275 memcpy(©->fh, &cstate->current_fh.fh_handle, 1276 sizeof(struct knfsd_fh)); 1277 if (!copy->cp_synchronous) { 1278 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1279 1280 status = nfserrno(-ENOMEM); 1281 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1282 if (!async_copy) 1283 goto out; 1284 if (!nfs4_init_cp_state(nn, copy)) { 1285 kfree(async_copy); 1286 goto out; 1287 } 1288 refcount_set(&async_copy->refcount, 1); 1289 memcpy(©->cp_res.cb_stateid, ©->cp_stateid, 1290 sizeof(copy->cp_stateid)); 1291 dup_copy_fields(copy, async_copy); 1292 async_copy->copy_task = kthread_create(nfsd4_do_async_copy, 1293 async_copy, "%s", "copy thread"); 1294 if (IS_ERR(async_copy->copy_task)) 1295 goto out_err; 1296 spin_lock(&async_copy->cp_clp->async_lock); 1297 list_add(&async_copy->copies, 1298 &async_copy->cp_clp->async_copies); 1299 spin_unlock(&async_copy->cp_clp->async_lock); 1300 wake_up_process(async_copy->copy_task); 1301 status = nfs_ok; 1302 } else 1303 status = nfsd4_do_copy(copy, 1); 1304 out: 1305 return status; 1306 out_err: 1307 cleanup_async_copy(async_copy); 1308 goto out; 1309 } 1310 1311 struct nfsd4_copy * 1312 find_async_copy(struct nfs4_client *clp, stateid_t *stateid) 1313 { 1314 struct nfsd4_copy *copy; 1315 1316 spin_lock(&clp->async_lock); 1317 list_for_each_entry(copy, &clp->async_copies, copies) { 1318 if (memcmp(©->cp_stateid, stateid, NFS4_STATEID_SIZE)) 1319 continue; 1320 refcount_inc(©->refcount); 1321 spin_unlock(&clp->async_lock); 1322 return copy; 1323 } 1324 spin_unlock(&clp->async_lock); 1325 return NULL; 1326 } 1327 1328 static __be32 1329 nfsd4_offload_cancel(struct svc_rqst *rqstp, 1330 struct nfsd4_compound_state *cstate, 1331 union nfsd4_op_u *u) 1332 { 1333 struct nfsd4_offload_status *os = &u->offload_status; 1334 __be32 status = 0; 1335 struct nfsd4_copy *copy; 1336 struct nfs4_client *clp = cstate->clp; 1337 1338 copy = find_async_copy(clp, &os->stateid); 1339 if (copy) 1340 nfsd4_stop_copy(copy); 1341 else 1342 status = nfserr_bad_stateid; 1343 1344 return status; 1345 } 1346 1347 static __be32 1348 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1349 struct nfsd4_fallocate *fallocate, int flags) 1350 { 1351 __be32 status = nfserr_notsupp; 1352 struct file *file; 1353 1354 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1355 &fallocate->falloc_stateid, 1356 WR_STATE, &file, NULL); 1357 if (status != nfs_ok) { 1358 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1359 return status; 1360 } 1361 1362 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file, 1363 fallocate->falloc_offset, 1364 fallocate->falloc_length, 1365 flags); 1366 fput(file); 1367 return status; 1368 } 1369 static __be32 1370 nfsd4_offload_status(struct svc_rqst *rqstp, 1371 struct nfsd4_compound_state *cstate, 1372 union nfsd4_op_u *u) 1373 { 1374 struct nfsd4_offload_status *os = &u->offload_status; 1375 __be32 status = 0; 1376 struct nfsd4_copy *copy; 1377 struct nfs4_client *clp = cstate->clp; 1378 1379 copy = find_async_copy(clp, &os->stateid); 1380 if (copy) { 1381 os->count = copy->cp_res.wr_bytes_written; 1382 nfs4_put_copy(copy); 1383 } else 1384 status = nfserr_bad_stateid; 1385 1386 return status; 1387 } 1388 1389 static __be32 1390 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1391 union nfsd4_op_u *u) 1392 { 1393 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0); 1394 } 1395 1396 static __be32 1397 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1398 union nfsd4_op_u *u) 1399 { 1400 return nfsd4_fallocate(rqstp, cstate, &u->deallocate, 1401 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1402 } 1403 1404 static __be32 1405 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1406 union nfsd4_op_u *u) 1407 { 1408 struct nfsd4_seek *seek = &u->seek; 1409 int whence; 1410 __be32 status; 1411 struct file *file; 1412 1413 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1414 &seek->seek_stateid, 1415 RD_STATE, &file, NULL); 1416 if (status) { 1417 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1418 return status; 1419 } 1420 1421 switch (seek->seek_whence) { 1422 case NFS4_CONTENT_DATA: 1423 whence = SEEK_DATA; 1424 break; 1425 case NFS4_CONTENT_HOLE: 1426 whence = SEEK_HOLE; 1427 break; 1428 default: 1429 status = nfserr_union_notsupp; 1430 goto out; 1431 } 1432 1433 /* 1434 * Note: This call does change file->f_pos, but nothing in NFSD 1435 * should ever file->f_pos. 1436 */ 1437 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); 1438 if (seek->seek_pos < 0) 1439 status = nfserrno(seek->seek_pos); 1440 else if (seek->seek_pos >= i_size_read(file_inode(file))) 1441 seek->seek_eof = true; 1442 1443 out: 1444 fput(file); 1445 return status; 1446 } 1447 1448 /* This routine never returns NFS_OK! If there are no other errors, it 1449 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1450 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1451 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1452 */ 1453 static __be32 1454 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1455 struct nfsd4_verify *verify) 1456 { 1457 __be32 *buf, *p; 1458 int count; 1459 __be32 status; 1460 1461 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1462 if (status) 1463 return status; 1464 1465 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1466 if (status) 1467 return status; 1468 1469 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1470 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1471 return nfserr_inval; 1472 if (verify->ve_attrlen & 3) 1473 return nfserr_inval; 1474 1475 /* count in words: 1476 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1477 */ 1478 count = 4 + (verify->ve_attrlen >> 2); 1479 buf = kmalloc(count << 2, GFP_KERNEL); 1480 if (!buf) 1481 return nfserr_jukebox; 1482 1483 p = buf; 1484 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1485 cstate->current_fh.fh_export, 1486 cstate->current_fh.fh_dentry, 1487 verify->ve_bmval, 1488 rqstp, 0); 1489 /* 1490 * If nfsd4_encode_fattr() ran out of space, assume that's because 1491 * the attributes are longer (hence different) than those given: 1492 */ 1493 if (status == nfserr_resource) 1494 status = nfserr_not_same; 1495 if (status) 1496 goto out_kfree; 1497 1498 /* skip bitmap */ 1499 p = buf + 1 + ntohl(buf[0]); 1500 status = nfserr_not_same; 1501 if (ntohl(*p++) != verify->ve_attrlen) 1502 goto out_kfree; 1503 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1504 status = nfserr_same; 1505 1506 out_kfree: 1507 kfree(buf); 1508 return status; 1509 } 1510 1511 static __be32 1512 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1513 union nfsd4_op_u *u) 1514 { 1515 __be32 status; 1516 1517 status = _nfsd4_verify(rqstp, cstate, &u->verify); 1518 return status == nfserr_not_same ? nfs_ok : status; 1519 } 1520 1521 static __be32 1522 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1523 union nfsd4_op_u *u) 1524 { 1525 __be32 status; 1526 1527 status = _nfsd4_verify(rqstp, cstate, &u->nverify); 1528 return status == nfserr_same ? nfs_ok : status; 1529 } 1530 1531 #ifdef CONFIG_NFSD_PNFS 1532 static const struct nfsd4_layout_ops * 1533 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1534 { 1535 if (!exp->ex_layout_types) { 1536 dprintk("%s: export does not support pNFS\n", __func__); 1537 return NULL; 1538 } 1539 1540 if (layout_type >= LAYOUT_TYPE_MAX || 1541 !(exp->ex_layout_types & (1 << layout_type))) { 1542 dprintk("%s: layout type %d not supported\n", 1543 __func__, layout_type); 1544 return NULL; 1545 } 1546 1547 return nfsd4_layout_ops[layout_type]; 1548 } 1549 1550 static __be32 1551 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1552 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1553 { 1554 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo; 1555 const struct nfsd4_layout_ops *ops; 1556 struct nfsd4_deviceid_map *map; 1557 struct svc_export *exp; 1558 __be32 nfserr; 1559 1560 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1561 __func__, 1562 gdp->gd_layout_type, 1563 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1564 gdp->gd_maxcount); 1565 1566 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1567 if (!map) { 1568 dprintk("%s: couldn't find device ID to export mapping!\n", 1569 __func__); 1570 return nfserr_noent; 1571 } 1572 1573 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1574 if (IS_ERR(exp)) { 1575 dprintk("%s: could not find device id\n", __func__); 1576 return nfserr_noent; 1577 } 1578 1579 nfserr = nfserr_layoutunavailable; 1580 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1581 if (!ops) 1582 goto out; 1583 1584 nfserr = nfs_ok; 1585 if (gdp->gd_maxcount != 0) { 1586 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1587 rqstp, cstate->session->se_client, gdp); 1588 } 1589 1590 gdp->gd_notify_types &= ops->notify_types; 1591 out: 1592 exp_put(exp); 1593 return nfserr; 1594 } 1595 1596 static void 1597 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u) 1598 { 1599 kfree(u->getdeviceinfo.gd_device); 1600 } 1601 1602 static __be32 1603 nfsd4_layoutget(struct svc_rqst *rqstp, 1604 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1605 { 1606 struct nfsd4_layoutget *lgp = &u->layoutget; 1607 struct svc_fh *current_fh = &cstate->current_fh; 1608 const struct nfsd4_layout_ops *ops; 1609 struct nfs4_layout_stateid *ls; 1610 __be32 nfserr; 1611 int accmode = NFSD_MAY_READ_IF_EXEC; 1612 1613 switch (lgp->lg_seg.iomode) { 1614 case IOMODE_READ: 1615 accmode |= NFSD_MAY_READ; 1616 break; 1617 case IOMODE_RW: 1618 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE; 1619 break; 1620 default: 1621 dprintk("%s: invalid iomode %d\n", 1622 __func__, lgp->lg_seg.iomode); 1623 nfserr = nfserr_badiomode; 1624 goto out; 1625 } 1626 1627 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1628 if (nfserr) 1629 goto out; 1630 1631 nfserr = nfserr_layoutunavailable; 1632 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1633 if (!ops) 1634 goto out; 1635 1636 /* 1637 * Verify minlength and range as per RFC5661: 1638 * o If loga_length is less than loga_minlength, 1639 * the metadata server MUST return NFS4ERR_INVAL. 1640 * o If the sum of loga_offset and loga_minlength exceeds 1641 * NFS4_UINT64_MAX, and loga_minlength is not 1642 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1643 * o If the sum of loga_offset and loga_length exceeds 1644 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1645 * the error NFS4ERR_INVAL MUST result. 1646 */ 1647 nfserr = nfserr_inval; 1648 if (lgp->lg_seg.length < lgp->lg_minlength || 1649 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1650 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1651 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1652 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1653 goto out; 1654 if (lgp->lg_seg.length == 0) 1655 goto out; 1656 1657 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1658 true, lgp->lg_layout_type, &ls); 1659 if (nfserr) { 1660 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid); 1661 goto out; 1662 } 1663 1664 nfserr = nfserr_recallconflict; 1665 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1666 goto out_put_stid; 1667 1668 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1669 current_fh, lgp); 1670 if (nfserr) 1671 goto out_put_stid; 1672 1673 nfserr = nfsd4_insert_layout(lgp, ls); 1674 1675 out_put_stid: 1676 mutex_unlock(&ls->ls_mutex); 1677 nfs4_put_stid(&ls->ls_stid); 1678 out: 1679 return nfserr; 1680 } 1681 1682 static void 1683 nfsd4_layoutget_release(union nfsd4_op_u *u) 1684 { 1685 kfree(u->layoutget.lg_content); 1686 } 1687 1688 static __be32 1689 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1690 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1691 { 1692 struct nfsd4_layoutcommit *lcp = &u->layoutcommit; 1693 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1694 struct svc_fh *current_fh = &cstate->current_fh; 1695 const struct nfsd4_layout_ops *ops; 1696 loff_t new_size = lcp->lc_last_wr + 1; 1697 struct inode *inode; 1698 struct nfs4_layout_stateid *ls; 1699 __be32 nfserr; 1700 1701 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 1702 if (nfserr) 1703 goto out; 1704 1705 nfserr = nfserr_layoutunavailable; 1706 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 1707 if (!ops) 1708 goto out; 1709 inode = d_inode(current_fh->fh_dentry); 1710 1711 nfserr = nfserr_inval; 1712 if (new_size <= seg->offset) { 1713 dprintk("pnfsd: last write before layout segment\n"); 1714 goto out; 1715 } 1716 if (new_size > seg->offset + seg->length) { 1717 dprintk("pnfsd: last write beyond layout segment\n"); 1718 goto out; 1719 } 1720 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 1721 dprintk("pnfsd: layoutcommit beyond EOF\n"); 1722 goto out; 1723 } 1724 1725 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 1726 false, lcp->lc_layout_type, 1727 &ls); 1728 if (nfserr) { 1729 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid); 1730 /* fixup error code as per RFC5661 */ 1731 if (nfserr == nfserr_bad_stateid) 1732 nfserr = nfserr_badlayout; 1733 goto out; 1734 } 1735 1736 /* LAYOUTCOMMIT does not require any serialization */ 1737 mutex_unlock(&ls->ls_mutex); 1738 1739 if (new_size > i_size_read(inode)) { 1740 lcp->lc_size_chg = 1; 1741 lcp->lc_newsize = new_size; 1742 } else { 1743 lcp->lc_size_chg = 0; 1744 } 1745 1746 nfserr = ops->proc_layoutcommit(inode, lcp); 1747 nfs4_put_stid(&ls->ls_stid); 1748 out: 1749 return nfserr; 1750 } 1751 1752 static __be32 1753 nfsd4_layoutreturn(struct svc_rqst *rqstp, 1754 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1755 { 1756 struct nfsd4_layoutreturn *lrp = &u->layoutreturn; 1757 struct svc_fh *current_fh = &cstate->current_fh; 1758 __be32 nfserr; 1759 1760 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 1761 if (nfserr) 1762 goto out; 1763 1764 nfserr = nfserr_layoutunavailable; 1765 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 1766 goto out; 1767 1768 switch (lrp->lr_seg.iomode) { 1769 case IOMODE_READ: 1770 case IOMODE_RW: 1771 case IOMODE_ANY: 1772 break; 1773 default: 1774 dprintk("%s: invalid iomode %d\n", __func__, 1775 lrp->lr_seg.iomode); 1776 nfserr = nfserr_inval; 1777 goto out; 1778 } 1779 1780 switch (lrp->lr_return_type) { 1781 case RETURN_FILE: 1782 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 1783 break; 1784 case RETURN_FSID: 1785 case RETURN_ALL: 1786 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 1787 break; 1788 default: 1789 dprintk("%s: invalid return_type %d\n", __func__, 1790 lrp->lr_return_type); 1791 nfserr = nfserr_inval; 1792 break; 1793 } 1794 out: 1795 return nfserr; 1796 } 1797 #endif /* CONFIG_NFSD_PNFS */ 1798 1799 /* 1800 * NULL call. 1801 */ 1802 static __be32 1803 nfsd4_proc_null(struct svc_rqst *rqstp) 1804 { 1805 return nfs_ok; 1806 } 1807 1808 static inline void nfsd4_increment_op_stats(u32 opnum) 1809 { 1810 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1811 nfsdstats.nfs4_opcount[opnum]++; 1812 } 1813 1814 static const struct nfsd4_operation nfsd4_ops[]; 1815 1816 static const char *nfsd4_op_name(unsigned opnum); 1817 1818 /* 1819 * Enforce NFSv4.1 COMPOUND ordering rules: 1820 * 1821 * Also note, enforced elsewhere: 1822 * - SEQUENCE other than as first op results in 1823 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1824 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1825 * (Enforced in nfsd4_bind_conn_to_session().) 1826 * - DESTROY_SESSION must be the final operation in a compound, if 1827 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1828 * (Enforced in nfsd4_destroy_session().) 1829 */ 1830 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1831 { 1832 struct nfsd4_op *first_op = &args->ops[0]; 1833 1834 /* These ordering requirements don't apply to NFSv4.0: */ 1835 if (args->minorversion == 0) 1836 return nfs_ok; 1837 /* This is weird, but OK, not our problem: */ 1838 if (args->opcnt == 0) 1839 return nfs_ok; 1840 if (first_op->status == nfserr_op_illegal) 1841 return nfs_ok; 1842 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1843 return nfserr_op_not_in_session; 1844 if (first_op->opnum == OP_SEQUENCE) 1845 return nfs_ok; 1846 /* 1847 * So first_op is something allowed outside a session, like 1848 * EXCHANGE_ID; but then it has to be the only op in the 1849 * compound: 1850 */ 1851 if (args->opcnt != 1) 1852 return nfserr_not_only_op; 1853 return nfs_ok; 1854 } 1855 1856 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1857 { 1858 return &nfsd4_ops[op->opnum]; 1859 } 1860 1861 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1862 { 1863 if (op->opnum == OP_ILLEGAL) 1864 return false; 1865 return OPDESC(op)->op_flags & OP_CACHEME; 1866 } 1867 1868 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1869 { 1870 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1871 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1872 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1873 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1874 const struct nfsd4_operation *thisd = OPDESC(this); 1875 const struct nfsd4_operation *nextd; 1876 1877 /* 1878 * Most ops check wronsec on our own; only the putfh-like ops 1879 * have special rules. 1880 */ 1881 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1882 return false; 1883 /* 1884 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1885 * put-filehandle operation if we're not going to use the 1886 * result: 1887 */ 1888 if (argp->opcnt == resp->opcnt) 1889 return false; 1890 if (next->opnum == OP_ILLEGAL) 1891 return false; 1892 nextd = OPDESC(next); 1893 /* 1894 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1895 * errors themselves as necessary; others should check for them 1896 * now: 1897 */ 1898 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1899 } 1900 1901 static void svcxdr_init_encode(struct svc_rqst *rqstp, 1902 struct nfsd4_compoundres *resp) 1903 { 1904 struct xdr_stream *xdr = &resp->xdr; 1905 struct xdr_buf *buf = &rqstp->rq_res; 1906 struct kvec *head = buf->head; 1907 1908 xdr->buf = buf; 1909 xdr->iov = head; 1910 xdr->p = head->iov_base + head->iov_len; 1911 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1912 /* Tail and page_len should be zero at this point: */ 1913 buf->len = buf->head[0].iov_len; 1914 xdr->scratch.iov_len = 0; 1915 xdr->page_ptr = buf->pages - 1; 1916 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1917 - rqstp->rq_auth_slack; 1918 } 1919 1920 /* 1921 * COMPOUND call. 1922 */ 1923 static __be32 1924 nfsd4_proc_compound(struct svc_rqst *rqstp) 1925 { 1926 struct nfsd4_compoundargs *args = rqstp->rq_argp; 1927 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1928 struct nfsd4_op *op; 1929 struct nfsd4_compound_state *cstate = &resp->cstate; 1930 struct svc_fh *current_fh = &cstate->current_fh; 1931 struct svc_fh *save_fh = &cstate->save_fh; 1932 __be32 status; 1933 1934 svcxdr_init_encode(rqstp, resp); 1935 resp->tagp = resp->xdr.p; 1936 /* reserve space for: taglen, tag, and opcnt */ 1937 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1938 resp->taglen = args->taglen; 1939 resp->tag = args->tag; 1940 resp->rqstp = rqstp; 1941 cstate->minorversion = args->minorversion; 1942 fh_init(current_fh, NFS4_FHSIZE); 1943 fh_init(save_fh, NFS4_FHSIZE); 1944 /* 1945 * Don't use the deferral mechanism for NFSv4; compounds make it 1946 * too hard to avoid non-idempotency problems. 1947 */ 1948 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1949 1950 /* 1951 * According to RFC3010, this takes precedence over all other errors. 1952 */ 1953 status = nfserr_minor_vers_mismatch; 1954 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1955 goto out; 1956 status = nfserr_resource; 1957 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND) 1958 goto out; 1959 1960 status = nfs41_check_op_ordering(args); 1961 if (status) { 1962 op = &args->ops[0]; 1963 op->status = status; 1964 resp->opcnt = 1; 1965 goto encode_op; 1966 } 1967 1968 trace_nfsd_compound(rqstp, args->opcnt); 1969 while (!status && resp->opcnt < args->opcnt) { 1970 op = &args->ops[resp->opcnt++]; 1971 1972 /* 1973 * The XDR decode routines may have pre-set op->status; 1974 * for example, if there is a miscellaneous XDR error 1975 * it will be set to nfserr_bad_xdr. 1976 */ 1977 if (op->status) { 1978 if (op->opnum == OP_OPEN) 1979 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1980 goto encode_op; 1981 } 1982 1983 if (!current_fh->fh_dentry) { 1984 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1985 op->status = nfserr_nofilehandle; 1986 goto encode_op; 1987 } 1988 } else if (current_fh->fh_export->ex_fslocs.migrated && 1989 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1990 op->status = nfserr_moved; 1991 goto encode_op; 1992 } 1993 1994 fh_clear_wcc(current_fh); 1995 1996 /* If op is non-idempotent */ 1997 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1998 /* 1999 * Don't execute this op if we couldn't encode a 2000 * succesful reply: 2001 */ 2002 u32 plen = op->opdesc->op_rsize_bop(rqstp, op); 2003 /* 2004 * Plus if there's another operation, make sure 2005 * we'll have space to at least encode an error: 2006 */ 2007 if (resp->opcnt < args->opcnt) 2008 plen += COMPOUND_ERR_SLACK_SPACE; 2009 op->status = nfsd4_check_resp_size(resp, plen); 2010 } 2011 2012 if (op->status) 2013 goto encode_op; 2014 2015 if (op->opdesc->op_get_currentstateid) 2016 op->opdesc->op_get_currentstateid(cstate, &op->u); 2017 op->status = op->opdesc->op_func(rqstp, cstate, &op->u); 2018 2019 /* Only from SEQUENCE */ 2020 if (cstate->status == nfserr_replay_cache) { 2021 dprintk("%s NFS4.1 replay from cache\n", __func__); 2022 status = op->status; 2023 goto out; 2024 } 2025 if (!op->status) { 2026 if (op->opdesc->op_set_currentstateid) 2027 op->opdesc->op_set_currentstateid(cstate, &op->u); 2028 2029 if (op->opdesc->op_flags & OP_CLEAR_STATEID) 2030 clear_current_stateid(cstate); 2031 2032 if (need_wrongsec_check(rqstp)) 2033 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 2034 } 2035 encode_op: 2036 if (op->status == nfserr_replay_me) { 2037 op->replay = &cstate->replay_owner->so_replay; 2038 nfsd4_encode_replay(&resp->xdr, op); 2039 status = op->status = op->replay->rp_status; 2040 } else { 2041 nfsd4_encode_operation(resp, op); 2042 status = op->status; 2043 } 2044 2045 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status, 2046 nfsd4_op_name(op->opnum)); 2047 2048 nfsd4_cstate_clear_replay(cstate); 2049 nfsd4_increment_op_stats(op->opnum); 2050 } 2051 2052 cstate->status = status; 2053 fh_put(current_fh); 2054 fh_put(save_fh); 2055 BUG_ON(cstate->replay_owner); 2056 out: 2057 /* Reset deferral mechanism for RPC deferrals */ 2058 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2059 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 2060 return status; 2061 } 2062 2063 #define op_encode_hdr_size (2) 2064 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 2065 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 2066 #define op_encode_change_info_maxsz (5) 2067 #define nfs4_fattr_bitmap_maxsz (4) 2068 2069 /* We'll fall back on returning no lockowner if run out of space: */ 2070 #define op_encode_lockowner_maxsz (0) 2071 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 2072 2073 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 2074 2075 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 2076 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 2077 op_encode_ace_maxsz) 2078 2079 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 2080 2081 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2082 { 2083 return (op_encode_hdr_size) * sizeof(__be32); 2084 } 2085 2086 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2087 { 2088 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 2089 } 2090 2091 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2092 { 2093 /* ac_supported, ac_resp_access */ 2094 return (op_encode_hdr_size + 2)* sizeof(__be32); 2095 } 2096 2097 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2098 { 2099 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 2100 } 2101 2102 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2103 { 2104 return (op_encode_hdr_size + op_encode_change_info_maxsz 2105 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2106 } 2107 2108 /* 2109 * Note since this is an idempotent operation we won't insist on failing 2110 * the op prematurely if the estimate is too large. We may turn off splice 2111 * reads unnecessarily. 2112 */ 2113 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 2114 struct nfsd4_op *op) 2115 { 2116 u32 *bmap = op->u.getattr.ga_bmval; 2117 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 2118 u32 ret = 0; 2119 2120 if (bmap0 & FATTR4_WORD0_ACL) 2121 return svc_max_payload(rqstp); 2122 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 2123 return svc_max_payload(rqstp); 2124 2125 if (bmap1 & FATTR4_WORD1_OWNER) { 2126 ret += IDMAP_NAMESZ + 4; 2127 bmap1 &= ~FATTR4_WORD1_OWNER; 2128 } 2129 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 2130 ret += IDMAP_NAMESZ + 4; 2131 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 2132 } 2133 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 2134 ret += NFS4_FHSIZE + 4; 2135 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 2136 } 2137 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 2138 ret += NFS4_MAXLABELLEN + 12; 2139 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2140 } 2141 /* 2142 * Largest of remaining attributes are 16 bytes (e.g., 2143 * supported_attributes) 2144 */ 2145 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 2146 /* bitmask, length */ 2147 ret += 20; 2148 return ret; 2149 } 2150 2151 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2152 { 2153 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE; 2154 } 2155 2156 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2157 { 2158 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2159 * sizeof(__be32); 2160 } 2161 2162 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2163 { 2164 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 2165 * sizeof(__be32); 2166 } 2167 2168 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2169 { 2170 return (op_encode_hdr_size + op_encode_stateid_maxsz 2171 + op_encode_change_info_maxsz + 1 2172 + nfs4_fattr_bitmap_maxsz 2173 + op_encode_delegation_maxsz) * sizeof(__be32); 2174 } 2175 2176 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2177 { 2178 u32 maxcount = 0, rlen = 0; 2179 2180 maxcount = svc_max_payload(rqstp); 2181 rlen = min(op->u.read.rd_length, maxcount); 2182 2183 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2184 } 2185 2186 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2187 { 2188 u32 maxcount = 0, rlen = 0; 2189 2190 maxcount = svc_max_payload(rqstp); 2191 rlen = min(op->u.readdir.rd_maxcount, maxcount); 2192 2193 return (op_encode_hdr_size + op_encode_verifier_maxsz + 2194 XDR_QUADLEN(rlen)) * sizeof(__be32); 2195 } 2196 2197 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2198 { 2199 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE; 2200 } 2201 2202 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2203 { 2204 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2205 * sizeof(__be32); 2206 } 2207 2208 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2209 { 2210 return (op_encode_hdr_size + op_encode_change_info_maxsz 2211 + op_encode_change_info_maxsz) * sizeof(__be32); 2212 } 2213 2214 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 2215 struct nfsd4_op *op) 2216 { 2217 return (op_encode_hdr_size 2218 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 2219 } 2220 2221 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2222 { 2223 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids) 2224 * sizeof(__be32); 2225 } 2226 2227 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2228 { 2229 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2230 } 2231 2232 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2233 { 2234 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR * 2235 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32); 2236 } 2237 2238 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2239 { 2240 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 2241 sizeof(__be32); 2242 } 2243 2244 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2245 { 2246 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 2247 } 2248 2249 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2250 { 2251 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 2252 1 + 1 + /* eir_flags, spr_how */\ 2253 4 + /* spo_must_enforce & _allow with bitmap */\ 2254 2 + /*eir_server_owner.so_minor_id */\ 2255 /* eir_server_owner.so_major_id<> */\ 2256 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2257 /* eir_server_scope<> */\ 2258 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2259 1 + /* eir_server_impl_id array length */\ 2260 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 2261 } 2262 2263 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2264 { 2265 return (op_encode_hdr_size + \ 2266 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 2267 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 2268 } 2269 2270 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2271 { 2272 return (op_encode_hdr_size + \ 2273 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 2274 2 + /* csr_sequence, csr_flags */\ 2275 op_encode_channel_attrs_maxsz + \ 2276 op_encode_channel_attrs_maxsz) * sizeof(__be32); 2277 } 2278 2279 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2280 { 2281 return (op_encode_hdr_size + 2282 1 /* wr_callback */ + 2283 op_encode_stateid_maxsz /* wr_callback */ + 2284 2 /* wr_count */ + 2285 1 /* wr_committed */ + 2286 op_encode_verifier_maxsz + 2287 1 /* cr_consecutive */ + 2288 1 /* cr_synchronous */) * sizeof(__be32); 2289 } 2290 2291 static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp, 2292 struct nfsd4_op *op) 2293 { 2294 return (op_encode_hdr_size + 2295 2 /* osr_count */ + 2296 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32); 2297 } 2298 2299 #ifdef CONFIG_NFSD_PNFS 2300 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2301 { 2302 u32 maxcount = 0, rlen = 0; 2303 2304 maxcount = svc_max_payload(rqstp); 2305 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount); 2306 2307 return (op_encode_hdr_size + 2308 1 /* gd_layout_type*/ + 2309 XDR_QUADLEN(rlen) + 2310 2 /* gd_notify_types */) * sizeof(__be32); 2311 } 2312 2313 /* 2314 * At this stage we don't really know what layout driver will handle the request, 2315 * so we need to define an arbitrary upper bound here. 2316 */ 2317 #define MAX_LAYOUT_SIZE 128 2318 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2319 { 2320 return (op_encode_hdr_size + 2321 1 /* logr_return_on_close */ + 2322 op_encode_stateid_maxsz + 2323 1 /* nr of layouts */ + 2324 MAX_LAYOUT_SIZE) * sizeof(__be32); 2325 } 2326 2327 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2328 { 2329 return (op_encode_hdr_size + 2330 1 /* locr_newsize */ + 2331 2 /* ns_size */) * sizeof(__be32); 2332 } 2333 2334 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2335 { 2336 return (op_encode_hdr_size + 2337 1 /* lrs_stateid */ + 2338 op_encode_stateid_maxsz) * sizeof(__be32); 2339 } 2340 #endif /* CONFIG_NFSD_PNFS */ 2341 2342 2343 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2344 { 2345 return (op_encode_hdr_size + 3) * sizeof(__be32); 2346 } 2347 2348 static const struct nfsd4_operation nfsd4_ops[] = { 2349 [OP_ACCESS] = { 2350 .op_func = nfsd4_access, 2351 .op_name = "OP_ACCESS", 2352 .op_rsize_bop = nfsd4_access_rsize, 2353 }, 2354 [OP_CLOSE] = { 2355 .op_func = nfsd4_close, 2356 .op_flags = OP_MODIFIES_SOMETHING, 2357 .op_name = "OP_CLOSE", 2358 .op_rsize_bop = nfsd4_status_stateid_rsize, 2359 .op_get_currentstateid = nfsd4_get_closestateid, 2360 .op_set_currentstateid = nfsd4_set_closestateid, 2361 }, 2362 [OP_COMMIT] = { 2363 .op_func = nfsd4_commit, 2364 .op_flags = OP_MODIFIES_SOMETHING, 2365 .op_name = "OP_COMMIT", 2366 .op_rsize_bop = nfsd4_commit_rsize, 2367 }, 2368 [OP_CREATE] = { 2369 .op_func = nfsd4_create, 2370 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2371 .op_name = "OP_CREATE", 2372 .op_rsize_bop = nfsd4_create_rsize, 2373 }, 2374 [OP_DELEGRETURN] = { 2375 .op_func = nfsd4_delegreturn, 2376 .op_flags = OP_MODIFIES_SOMETHING, 2377 .op_name = "OP_DELEGRETURN", 2378 .op_rsize_bop = nfsd4_only_status_rsize, 2379 .op_get_currentstateid = nfsd4_get_delegreturnstateid, 2380 }, 2381 [OP_GETATTR] = { 2382 .op_func = nfsd4_getattr, 2383 .op_flags = ALLOWED_ON_ABSENT_FS, 2384 .op_rsize_bop = nfsd4_getattr_rsize, 2385 .op_name = "OP_GETATTR", 2386 }, 2387 [OP_GETFH] = { 2388 .op_func = nfsd4_getfh, 2389 .op_name = "OP_GETFH", 2390 .op_rsize_bop = nfsd4_getfh_rsize, 2391 }, 2392 [OP_LINK] = { 2393 .op_func = nfsd4_link, 2394 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2395 | OP_CACHEME, 2396 .op_name = "OP_LINK", 2397 .op_rsize_bop = nfsd4_link_rsize, 2398 }, 2399 [OP_LOCK] = { 2400 .op_func = nfsd4_lock, 2401 .op_flags = OP_MODIFIES_SOMETHING | 2402 OP_NONTRIVIAL_ERROR_ENCODE, 2403 .op_name = "OP_LOCK", 2404 .op_rsize_bop = nfsd4_lock_rsize, 2405 .op_set_currentstateid = nfsd4_set_lockstateid, 2406 }, 2407 [OP_LOCKT] = { 2408 .op_func = nfsd4_lockt, 2409 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE, 2410 .op_name = "OP_LOCKT", 2411 .op_rsize_bop = nfsd4_lock_rsize, 2412 }, 2413 [OP_LOCKU] = { 2414 .op_func = nfsd4_locku, 2415 .op_flags = OP_MODIFIES_SOMETHING, 2416 .op_name = "OP_LOCKU", 2417 .op_rsize_bop = nfsd4_status_stateid_rsize, 2418 .op_get_currentstateid = nfsd4_get_lockustateid, 2419 }, 2420 [OP_LOOKUP] = { 2421 .op_func = nfsd4_lookup, 2422 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2423 .op_name = "OP_LOOKUP", 2424 .op_rsize_bop = nfsd4_only_status_rsize, 2425 }, 2426 [OP_LOOKUPP] = { 2427 .op_func = nfsd4_lookupp, 2428 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2429 .op_name = "OP_LOOKUPP", 2430 .op_rsize_bop = nfsd4_only_status_rsize, 2431 }, 2432 [OP_NVERIFY] = { 2433 .op_func = nfsd4_nverify, 2434 .op_name = "OP_NVERIFY", 2435 .op_rsize_bop = nfsd4_only_status_rsize, 2436 }, 2437 [OP_OPEN] = { 2438 .op_func = nfsd4_open, 2439 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2440 .op_name = "OP_OPEN", 2441 .op_rsize_bop = nfsd4_open_rsize, 2442 .op_set_currentstateid = nfsd4_set_openstateid, 2443 }, 2444 [OP_OPEN_CONFIRM] = { 2445 .op_func = nfsd4_open_confirm, 2446 .op_flags = OP_MODIFIES_SOMETHING, 2447 .op_name = "OP_OPEN_CONFIRM", 2448 .op_rsize_bop = nfsd4_status_stateid_rsize, 2449 }, 2450 [OP_OPEN_DOWNGRADE] = { 2451 .op_func = nfsd4_open_downgrade, 2452 .op_flags = OP_MODIFIES_SOMETHING, 2453 .op_name = "OP_OPEN_DOWNGRADE", 2454 .op_rsize_bop = nfsd4_status_stateid_rsize, 2455 .op_get_currentstateid = nfsd4_get_opendowngradestateid, 2456 .op_set_currentstateid = nfsd4_set_opendowngradestateid, 2457 }, 2458 [OP_PUTFH] = { 2459 .op_func = nfsd4_putfh, 2460 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2461 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2462 .op_name = "OP_PUTFH", 2463 .op_rsize_bop = nfsd4_only_status_rsize, 2464 }, 2465 [OP_PUTPUBFH] = { 2466 .op_func = nfsd4_putrootfh, 2467 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2468 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2469 .op_name = "OP_PUTPUBFH", 2470 .op_rsize_bop = nfsd4_only_status_rsize, 2471 }, 2472 [OP_PUTROOTFH] = { 2473 .op_func = nfsd4_putrootfh, 2474 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2475 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2476 .op_name = "OP_PUTROOTFH", 2477 .op_rsize_bop = nfsd4_only_status_rsize, 2478 }, 2479 [OP_READ] = { 2480 .op_func = nfsd4_read, 2481 .op_release = nfsd4_read_release, 2482 .op_name = "OP_READ", 2483 .op_rsize_bop = nfsd4_read_rsize, 2484 .op_get_currentstateid = nfsd4_get_readstateid, 2485 }, 2486 [OP_READDIR] = { 2487 .op_func = nfsd4_readdir, 2488 .op_name = "OP_READDIR", 2489 .op_rsize_bop = nfsd4_readdir_rsize, 2490 }, 2491 [OP_READLINK] = { 2492 .op_func = nfsd4_readlink, 2493 .op_name = "OP_READLINK", 2494 .op_rsize_bop = nfsd4_readlink_rsize, 2495 }, 2496 [OP_REMOVE] = { 2497 .op_func = nfsd4_remove, 2498 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2499 .op_name = "OP_REMOVE", 2500 .op_rsize_bop = nfsd4_remove_rsize, 2501 }, 2502 [OP_RENAME] = { 2503 .op_func = nfsd4_rename, 2504 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2505 .op_name = "OP_RENAME", 2506 .op_rsize_bop = nfsd4_rename_rsize, 2507 }, 2508 [OP_RENEW] = { 2509 .op_func = nfsd4_renew, 2510 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2511 | OP_MODIFIES_SOMETHING, 2512 .op_name = "OP_RENEW", 2513 .op_rsize_bop = nfsd4_only_status_rsize, 2514 2515 }, 2516 [OP_RESTOREFH] = { 2517 .op_func = nfsd4_restorefh, 2518 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2519 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2520 .op_name = "OP_RESTOREFH", 2521 .op_rsize_bop = nfsd4_only_status_rsize, 2522 }, 2523 [OP_SAVEFH] = { 2524 .op_func = nfsd4_savefh, 2525 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2526 .op_name = "OP_SAVEFH", 2527 .op_rsize_bop = nfsd4_only_status_rsize, 2528 }, 2529 [OP_SECINFO] = { 2530 .op_func = nfsd4_secinfo, 2531 .op_release = nfsd4_secinfo_release, 2532 .op_flags = OP_HANDLES_WRONGSEC, 2533 .op_name = "OP_SECINFO", 2534 .op_rsize_bop = nfsd4_secinfo_rsize, 2535 }, 2536 [OP_SETATTR] = { 2537 .op_func = nfsd4_setattr, 2538 .op_name = "OP_SETATTR", 2539 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME 2540 | OP_NONTRIVIAL_ERROR_ENCODE, 2541 .op_rsize_bop = nfsd4_setattr_rsize, 2542 .op_get_currentstateid = nfsd4_get_setattrstateid, 2543 }, 2544 [OP_SETCLIENTID] = { 2545 .op_func = nfsd4_setclientid, 2546 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2547 | OP_MODIFIES_SOMETHING | OP_CACHEME 2548 | OP_NONTRIVIAL_ERROR_ENCODE, 2549 .op_name = "OP_SETCLIENTID", 2550 .op_rsize_bop = nfsd4_setclientid_rsize, 2551 }, 2552 [OP_SETCLIENTID_CONFIRM] = { 2553 .op_func = nfsd4_setclientid_confirm, 2554 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2555 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2556 .op_name = "OP_SETCLIENTID_CONFIRM", 2557 .op_rsize_bop = nfsd4_only_status_rsize, 2558 }, 2559 [OP_VERIFY] = { 2560 .op_func = nfsd4_verify, 2561 .op_name = "OP_VERIFY", 2562 .op_rsize_bop = nfsd4_only_status_rsize, 2563 }, 2564 [OP_WRITE] = { 2565 .op_func = nfsd4_write, 2566 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2567 .op_name = "OP_WRITE", 2568 .op_rsize_bop = nfsd4_write_rsize, 2569 .op_get_currentstateid = nfsd4_get_writestateid, 2570 }, 2571 [OP_RELEASE_LOCKOWNER] = { 2572 .op_func = nfsd4_release_lockowner, 2573 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2574 | OP_MODIFIES_SOMETHING, 2575 .op_name = "OP_RELEASE_LOCKOWNER", 2576 .op_rsize_bop = nfsd4_only_status_rsize, 2577 }, 2578 2579 /* NFSv4.1 operations */ 2580 [OP_EXCHANGE_ID] = { 2581 .op_func = nfsd4_exchange_id, 2582 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2583 | OP_MODIFIES_SOMETHING, 2584 .op_name = "OP_EXCHANGE_ID", 2585 .op_rsize_bop = nfsd4_exchange_id_rsize, 2586 }, 2587 [OP_BACKCHANNEL_CTL] = { 2588 .op_func = nfsd4_backchannel_ctl, 2589 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2590 .op_name = "OP_BACKCHANNEL_CTL", 2591 .op_rsize_bop = nfsd4_only_status_rsize, 2592 }, 2593 [OP_BIND_CONN_TO_SESSION] = { 2594 .op_func = nfsd4_bind_conn_to_session, 2595 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2596 | OP_MODIFIES_SOMETHING, 2597 .op_name = "OP_BIND_CONN_TO_SESSION", 2598 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize, 2599 }, 2600 [OP_CREATE_SESSION] = { 2601 .op_func = nfsd4_create_session, 2602 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2603 | OP_MODIFIES_SOMETHING, 2604 .op_name = "OP_CREATE_SESSION", 2605 .op_rsize_bop = nfsd4_create_session_rsize, 2606 }, 2607 [OP_DESTROY_SESSION] = { 2608 .op_func = nfsd4_destroy_session, 2609 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2610 | OP_MODIFIES_SOMETHING, 2611 .op_name = "OP_DESTROY_SESSION", 2612 .op_rsize_bop = nfsd4_only_status_rsize, 2613 }, 2614 [OP_SEQUENCE] = { 2615 .op_func = nfsd4_sequence, 2616 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 2617 .op_name = "OP_SEQUENCE", 2618 .op_rsize_bop = nfsd4_sequence_rsize, 2619 }, 2620 [OP_DESTROY_CLIENTID] = { 2621 .op_func = nfsd4_destroy_clientid, 2622 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2623 | OP_MODIFIES_SOMETHING, 2624 .op_name = "OP_DESTROY_CLIENTID", 2625 .op_rsize_bop = nfsd4_only_status_rsize, 2626 }, 2627 [OP_RECLAIM_COMPLETE] = { 2628 .op_func = nfsd4_reclaim_complete, 2629 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2630 .op_name = "OP_RECLAIM_COMPLETE", 2631 .op_rsize_bop = nfsd4_only_status_rsize, 2632 }, 2633 [OP_SECINFO_NO_NAME] = { 2634 .op_func = nfsd4_secinfo_no_name, 2635 .op_release = nfsd4_secinfo_no_name_release, 2636 .op_flags = OP_HANDLES_WRONGSEC, 2637 .op_name = "OP_SECINFO_NO_NAME", 2638 .op_rsize_bop = nfsd4_secinfo_rsize, 2639 }, 2640 [OP_TEST_STATEID] = { 2641 .op_func = nfsd4_test_stateid, 2642 .op_flags = ALLOWED_WITHOUT_FH, 2643 .op_name = "OP_TEST_STATEID", 2644 .op_rsize_bop = nfsd4_test_stateid_rsize, 2645 }, 2646 [OP_FREE_STATEID] = { 2647 .op_func = nfsd4_free_stateid, 2648 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2649 .op_name = "OP_FREE_STATEID", 2650 .op_get_currentstateid = nfsd4_get_freestateid, 2651 .op_rsize_bop = nfsd4_only_status_rsize, 2652 }, 2653 #ifdef CONFIG_NFSD_PNFS 2654 [OP_GETDEVICEINFO] = { 2655 .op_func = nfsd4_getdeviceinfo, 2656 .op_release = nfsd4_getdeviceinfo_release, 2657 .op_flags = ALLOWED_WITHOUT_FH, 2658 .op_name = "OP_GETDEVICEINFO", 2659 .op_rsize_bop = nfsd4_getdeviceinfo_rsize, 2660 }, 2661 [OP_LAYOUTGET] = { 2662 .op_func = nfsd4_layoutget, 2663 .op_release = nfsd4_layoutget_release, 2664 .op_flags = OP_MODIFIES_SOMETHING, 2665 .op_name = "OP_LAYOUTGET", 2666 .op_rsize_bop = nfsd4_layoutget_rsize, 2667 }, 2668 [OP_LAYOUTCOMMIT] = { 2669 .op_func = nfsd4_layoutcommit, 2670 .op_flags = OP_MODIFIES_SOMETHING, 2671 .op_name = "OP_LAYOUTCOMMIT", 2672 .op_rsize_bop = nfsd4_layoutcommit_rsize, 2673 }, 2674 [OP_LAYOUTRETURN] = { 2675 .op_func = nfsd4_layoutreturn, 2676 .op_flags = OP_MODIFIES_SOMETHING, 2677 .op_name = "OP_LAYOUTRETURN", 2678 .op_rsize_bop = nfsd4_layoutreturn_rsize, 2679 }, 2680 #endif /* CONFIG_NFSD_PNFS */ 2681 2682 /* NFSv4.2 operations */ 2683 [OP_ALLOCATE] = { 2684 .op_func = nfsd4_allocate, 2685 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2686 .op_name = "OP_ALLOCATE", 2687 .op_rsize_bop = nfsd4_only_status_rsize, 2688 }, 2689 [OP_DEALLOCATE] = { 2690 .op_func = nfsd4_deallocate, 2691 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2692 .op_name = "OP_DEALLOCATE", 2693 .op_rsize_bop = nfsd4_only_status_rsize, 2694 }, 2695 [OP_CLONE] = { 2696 .op_func = nfsd4_clone, 2697 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2698 .op_name = "OP_CLONE", 2699 .op_rsize_bop = nfsd4_only_status_rsize, 2700 }, 2701 [OP_COPY] = { 2702 .op_func = nfsd4_copy, 2703 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2704 .op_name = "OP_COPY", 2705 .op_rsize_bop = nfsd4_copy_rsize, 2706 }, 2707 [OP_SEEK] = { 2708 .op_func = nfsd4_seek, 2709 .op_name = "OP_SEEK", 2710 .op_rsize_bop = nfsd4_seek_rsize, 2711 }, 2712 [OP_OFFLOAD_STATUS] = { 2713 .op_func = nfsd4_offload_status, 2714 .op_name = "OP_OFFLOAD_STATUS", 2715 .op_rsize_bop = nfsd4_offload_status_rsize, 2716 }, 2717 [OP_OFFLOAD_CANCEL] = { 2718 .op_func = nfsd4_offload_cancel, 2719 .op_flags = OP_MODIFIES_SOMETHING, 2720 .op_name = "OP_OFFLOAD_CANCEL", 2721 .op_rsize_bop = nfsd4_only_status_rsize, 2722 }, 2723 }; 2724 2725 /** 2726 * nfsd4_spo_must_allow - Determine if the compound op contains an 2727 * operation that is allowed to be sent with machine credentials 2728 * 2729 * @rqstp: a pointer to the struct svc_rqst 2730 * 2731 * Checks to see if the compound contains a spo_must_allow op 2732 * and confirms that it was sent with the proper machine creds. 2733 */ 2734 2735 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 2736 { 2737 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2738 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2739 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2740 struct nfsd4_compound_state *cstate = &resp->cstate; 2741 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 2742 u32 opiter; 2743 2744 if (!cstate->minorversion) 2745 return false; 2746 2747 if (cstate->spo_must_allowed == true) 2748 return true; 2749 2750 opiter = resp->opcnt; 2751 while (opiter < argp->opcnt) { 2752 this = &argp->ops[opiter++]; 2753 if (test_bit(this->opnum, allow->u.longs) && 2754 cstate->clp->cl_mach_cred && 2755 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 2756 cstate->spo_must_allowed = true; 2757 return true; 2758 } 2759 } 2760 cstate->spo_must_allowed = false; 2761 return false; 2762 } 2763 2764 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 2765 { 2766 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp) 2767 return op_encode_hdr_size * sizeof(__be32); 2768 2769 BUG_ON(OPDESC(op)->op_rsize_bop == NULL); 2770 return OPDESC(op)->op_rsize_bop(rqstp, op); 2771 } 2772 2773 void warn_on_nonidempotent_op(struct nfsd4_op *op) 2774 { 2775 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 2776 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 2777 op->opnum, nfsd4_op_name(op->opnum)); 2778 WARN_ON_ONCE(1); 2779 } 2780 } 2781 2782 static const char *nfsd4_op_name(unsigned opnum) 2783 { 2784 if (opnum < ARRAY_SIZE(nfsd4_ops)) 2785 return nfsd4_ops[opnum].op_name; 2786 return "unknown_operation"; 2787 } 2788 2789 #define nfsd4_voidres nfsd4_voidargs 2790 struct nfsd4_voidargs { int dummy; }; 2791 2792 static const struct svc_procedure nfsd_procedures4[2] = { 2793 [NFSPROC4_NULL] = { 2794 .pc_func = nfsd4_proc_null, 2795 .pc_encode = nfs4svc_encode_voidres, 2796 .pc_argsize = sizeof(struct nfsd4_voidargs), 2797 .pc_ressize = sizeof(struct nfsd4_voidres), 2798 .pc_cachetype = RC_NOCACHE, 2799 .pc_xdrressize = 1, 2800 }, 2801 [NFSPROC4_COMPOUND] = { 2802 .pc_func = nfsd4_proc_compound, 2803 .pc_decode = nfs4svc_decode_compoundargs, 2804 .pc_encode = nfs4svc_encode_compoundres, 2805 .pc_argsize = sizeof(struct nfsd4_compoundargs), 2806 .pc_ressize = sizeof(struct nfsd4_compoundres), 2807 .pc_release = nfsd4_release_compoundargs, 2808 .pc_cachetype = RC_NOCACHE, 2809 .pc_xdrressize = NFSD_BUFSIZE/4, 2810 }, 2811 }; 2812 2813 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)]; 2814 const struct svc_version nfsd_version4 = { 2815 .vs_vers = 4, 2816 .vs_nproc = 2, 2817 .vs_proc = nfsd_procedures4, 2818 .vs_count = nfsd_count3, 2819 .vs_dispatch = nfsd_dispatch, 2820 .vs_xdrsize = NFS4_SVC_XDRSIZE, 2821 .vs_rpcb_optnl = true, 2822 .vs_need_cong_ctrl = true, 2823 }; 2824 2825 /* 2826 * Local variables: 2827 * c-basic-offset: 8 2828 * End: 2829 */ 2830