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