1 /* 2 * Server-side procedures for NFSv4. 3 * 4 * Copyright (c) 2002 The Regents of the University of Michigan. 5 * All rights reserved. 6 * 7 * Kendrick Smith <kmsmith@umich.edu> 8 * Andy Adamson <andros@umich.edu> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 #include <linux/file.h> 36 #include <linux/falloc.h> 37 #include <linux/slab.h> 38 39 #include "idmap.h" 40 #include "cache.h" 41 #include "xdr4.h" 42 #include "vfs.h" 43 #include "current_stateid.h" 44 #include "netns.h" 45 #include "acl.h" 46 #include "pnfs.h" 47 #include "trace.h" 48 49 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 50 #include <linux/security.h> 51 52 static inline void 53 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 54 { 55 struct inode *inode = d_inode(resfh->fh_dentry); 56 int status; 57 58 inode_lock(inode); 59 status = security_inode_setsecctx(resfh->fh_dentry, 60 label->data, label->len); 61 inode_unlock(inode); 62 63 if (status) 64 /* 65 * XXX: We should really fail the whole open, but we may 66 * already have created a new file, so it may be too 67 * late. For now this seems the least of evils: 68 */ 69 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 70 71 return; 72 } 73 #else 74 static inline void 75 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 76 { } 77 #endif 78 79 #define NFSDDBG_FACILITY NFSDDBG_PROC 80 81 static u32 nfsd_attrmask[] = { 82 NFSD_WRITEABLE_ATTRS_WORD0, 83 NFSD_WRITEABLE_ATTRS_WORD1, 84 NFSD_WRITEABLE_ATTRS_WORD2 85 }; 86 87 static u32 nfsd41_ex_attrmask[] = { 88 NFSD_SUPPATTR_EXCLCREAT_WORD0, 89 NFSD_SUPPATTR_EXCLCREAT_WORD1, 90 NFSD_SUPPATTR_EXCLCREAT_WORD2 91 }; 92 93 static __be32 94 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 95 u32 *bmval, u32 *writable) 96 { 97 struct dentry *dentry = cstate->current_fh.fh_dentry; 98 struct svc_export *exp = cstate->current_fh.fh_export; 99 100 if (!nfsd_attrs_supported(cstate->minorversion, bmval)) 101 return nfserr_attrnotsupp; 102 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry))) 103 return nfserr_attrnotsupp; 104 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) && 105 !(exp->ex_flags & NFSEXP_SECURITY_LABEL)) 106 return nfserr_attrnotsupp; 107 if (writable && !bmval_is_subset(bmval, writable)) 108 return nfserr_inval; 109 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) && 110 (bmval[1] & FATTR4_WORD1_MODE)) 111 return nfserr_inval; 112 return nfs_ok; 113 } 114 115 static __be32 116 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 117 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 118 { 119 __be32 status = nfs_ok; 120 121 if (open->op_create == NFS4_OPEN_CREATE) { 122 if (open->op_createmode == NFS4_CREATE_UNCHECKED 123 || open->op_createmode == NFS4_CREATE_GUARDED) 124 status = check_attr_support(rqstp, cstate, 125 open->op_bmval, nfsd_attrmask); 126 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 127 status = check_attr_support(rqstp, cstate, 128 open->op_bmval, nfsd41_ex_attrmask); 129 } 130 131 return status; 132 } 133 134 static int 135 is_create_with_attrs(struct nfsd4_open *open) 136 { 137 return open->op_create == NFS4_OPEN_CREATE 138 && (open->op_createmode == NFS4_CREATE_UNCHECKED 139 || open->op_createmode == NFS4_CREATE_GUARDED 140 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 141 } 142 143 /* 144 * if error occurs when setting the acl, just clear the acl bit 145 * in the returned attr bitmap. 146 */ 147 static void 148 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 149 struct nfs4_acl *acl, u32 *bmval) 150 { 151 __be32 status; 152 153 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 154 if (status) 155 /* 156 * We should probably fail the whole open at this point, 157 * but we've already created the file, so it's too late; 158 * So this seems the least of evils: 159 */ 160 bmval[0] &= ~FATTR4_WORD0_ACL; 161 } 162 163 static inline void 164 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 165 { 166 fh_put(dst); 167 dget(src->fh_dentry); 168 if (src->fh_export) 169 exp_get(src->fh_export); 170 *dst = *src; 171 } 172 173 static __be32 174 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 175 { 176 __be32 status; 177 178 if (open->op_truncate && 179 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 180 return nfserr_inval; 181 182 accmode |= NFSD_MAY_READ_IF_EXEC; 183 184 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 185 accmode |= NFSD_MAY_READ; 186 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 187 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 188 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 189 accmode |= NFSD_MAY_WRITE; 190 191 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 192 193 return status; 194 } 195 196 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 197 { 198 umode_t mode = d_inode(fh->fh_dentry)->i_mode; 199 200 if (S_ISREG(mode)) 201 return nfs_ok; 202 if (S_ISDIR(mode)) 203 return nfserr_isdir; 204 /* 205 * Using err_symlink as our catch-all case may look odd; but 206 * there's no other obvious error for this case in 4.0, and we 207 * happen to know that it will cause the linux v4 client to do 208 * the right thing on attempts to open something other than a 209 * regular file. 210 */ 211 return nfserr_symlink; 212 } 213 214 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 215 { 216 if (nfsd4_has_session(cstate)) 217 return; 218 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 219 &resfh->fh_handle); 220 } 221 222 static __be32 223 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) 224 { 225 struct svc_fh *current_fh = &cstate->current_fh; 226 int accmode; 227 __be32 status; 228 229 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 230 if (!*resfh) 231 return nfserr_jukebox; 232 fh_init(*resfh, NFS4_FHSIZE); 233 open->op_truncate = 0; 234 235 if (open->op_create) { 236 /* FIXME: check session persistence and pnfs flags. 237 * The nfsv4.1 spec requires the following semantics: 238 * 239 * Persistent | pNFS | Server REQUIRED | Client Allowed 240 * Reply Cache | server | | 241 * -------------+--------+-----------------+-------------------- 242 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 243 * | | | (SHOULD) 244 * | | and EXCLUSIVE4 | or EXCLUSIVE4 245 * | | | (SHOULD NOT) 246 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 247 * yes | no | GUARDED4 | GUARDED4 248 * yes | yes | GUARDED4 | GUARDED4 249 */ 250 251 /* 252 * Note: create modes (UNCHECKED,GUARDED...) are the same 253 * in NFSv4 as in v3 except EXCLUSIVE4_1. 254 */ 255 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, 256 open->op_fname.len, &open->op_iattr, 257 *resfh, open->op_createmode, 258 (u32 *)open->op_verf.data, 259 &open->op_truncate, &open->op_created); 260 261 if (!status && open->op_label.len) 262 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); 263 264 /* 265 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4 266 * use the returned bitmask to indicate which attributes 267 * we used to store the verifier: 268 */ 269 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0) 270 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS | 271 FATTR4_WORD1_TIME_MODIFY); 272 } else 273 /* 274 * Note this may exit with the parent still locked. 275 * We will hold the lock until nfsd4_open's final 276 * lookup, to prevent renames or unlinks until we've had 277 * a chance to an acquire a delegation if appropriate. 278 */ 279 status = nfsd_lookup(rqstp, current_fh, 280 open->op_fname.data, open->op_fname.len, *resfh); 281 if (status) 282 goto out; 283 status = nfsd_check_obj_isreg(*resfh); 284 if (status) 285 goto out; 286 287 if (is_create_with_attrs(open) && open->op_acl != NULL) 288 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); 289 290 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); 291 accmode = NFSD_MAY_NOP; 292 if (open->op_created || 293 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 294 accmode |= NFSD_MAY_OWNER_OVERRIDE; 295 status = do_open_permission(rqstp, *resfh, open, accmode); 296 set_change_info(&open->op_cinfo, current_fh); 297 out: 298 return status; 299 } 300 301 static __be32 302 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 303 { 304 struct svc_fh *current_fh = &cstate->current_fh; 305 __be32 status; 306 int accmode = 0; 307 308 /* We don't know the target directory, and therefore can not 309 * set the change info 310 */ 311 312 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 313 314 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 315 316 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 317 (open->op_iattr.ia_size == 0); 318 /* 319 * In the delegation case, the client is telling us about an 320 * open that it *already* performed locally, some time ago. We 321 * should let it succeed now if possible. 322 * 323 * In the case of a CLAIM_FH open, on the other hand, the client 324 * may be counting on us to enforce permissions (the Linux 4.1 325 * client uses this for normal opens, for example). 326 */ 327 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 328 accmode = NFSD_MAY_OWNER_OVERRIDE; 329 330 status = do_open_permission(rqstp, current_fh, open, accmode); 331 332 return status; 333 } 334 335 static void 336 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 337 { 338 struct nfsd4_sessionid *sid = 339 (struct nfsd4_sessionid *)session->se_sessionid.data; 340 341 clid->cl_boot = sid->clientid.cl_boot; 342 clid->cl_id = sid->clientid.cl_id; 343 } 344 345 static __be32 346 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 347 union nfsd4_op_u *u) 348 { 349 struct nfsd4_open *open = &u->open; 350 __be32 status; 351 struct svc_fh *resfh = NULL; 352 struct net *net = SVC_NET(rqstp); 353 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 354 355 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 356 (int)open->op_fname.len, open->op_fname.data, 357 open->op_openowner); 358 359 /* This check required by spec. */ 360 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 361 return nfserr_inval; 362 363 open->op_created = 0; 364 /* 365 * RFC5661 18.51.3 366 * Before RECLAIM_COMPLETE done, server should deny new lock 367 */ 368 if (nfsd4_has_session(cstate) && 369 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 370 &cstate->session->se_client->cl_flags) && 371 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 372 return nfserr_grace; 373 374 if (nfsd4_has_session(cstate)) 375 copy_clientid(&open->op_clientid, cstate->session); 376 377 /* check seqid for replay. set nfs4_owner */ 378 status = nfsd4_process_open1(cstate, open, nn); 379 if (status == nfserr_replay_me) { 380 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 381 fh_put(&cstate->current_fh); 382 fh_copy_shallow(&cstate->current_fh.fh_handle, 383 &rp->rp_openfh); 384 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 385 if (status) 386 dprintk("nfsd4_open: replay failed" 387 " restoring previous filehandle\n"); 388 else 389 status = nfserr_replay_me; 390 } 391 if (status) 392 goto out; 393 if (open->op_xdr_error) { 394 status = open->op_xdr_error; 395 goto out; 396 } 397 398 status = nfsd4_check_open_attributes(rqstp, cstate, open); 399 if (status) 400 goto out; 401 402 /* Openowner is now set, so sequence id will get bumped. Now we need 403 * these checks before we do any creates: */ 404 status = nfserr_grace; 405 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 406 goto out; 407 status = nfserr_no_grace; 408 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 409 goto out; 410 411 switch (open->op_claim_type) { 412 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 413 case NFS4_OPEN_CLAIM_NULL: 414 status = do_open_lookup(rqstp, cstate, open, &resfh); 415 if (status) 416 goto out; 417 break; 418 case NFS4_OPEN_CLAIM_PREVIOUS: 419 status = nfs4_check_open_reclaim(&open->op_clientid, 420 cstate, nn); 421 if (status) 422 goto out; 423 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 424 case NFS4_OPEN_CLAIM_FH: 425 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 426 status = do_open_fhandle(rqstp, cstate, open); 427 if (status) 428 goto out; 429 resfh = &cstate->current_fh; 430 break; 431 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 432 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 433 dprintk("NFSD: unsupported OPEN claim type %d\n", 434 open->op_claim_type); 435 status = nfserr_notsupp; 436 goto out; 437 default: 438 dprintk("NFSD: Invalid OPEN claim type %d\n", 439 open->op_claim_type); 440 status = nfserr_inval; 441 goto out; 442 } 443 /* 444 * nfsd4_process_open2() does the actual opening of the file. If 445 * successful, it (1) truncates the file if open->op_truncate was 446 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 447 */ 448 status = nfsd4_process_open2(rqstp, resfh, open); 449 WARN(status && open->op_created, 450 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 451 be32_to_cpu(status)); 452 out: 453 if (resfh && resfh != &cstate->current_fh) { 454 fh_dup2(&cstate->current_fh, resfh); 455 fh_put(resfh); 456 kfree(resfh); 457 } 458 nfsd4_cleanup_open_state(cstate, open); 459 nfsd4_bump_seqid(cstate, status); 460 return status; 461 } 462 463 /* 464 * OPEN is the only seqid-mutating operation whose decoding can fail 465 * with a seqid-mutating error (specifically, decoding of user names in 466 * the attributes). Therefore we have to do some processing to look up 467 * the stateowner so that we can bump the seqid. 468 */ 469 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 470 { 471 struct nfsd4_open *open = &op->u.open; 472 473 if (!seqid_mutating_err(ntohl(op->status))) 474 return op->status; 475 if (nfsd4_has_session(cstate)) 476 return op->status; 477 open->op_xdr_error = op->status; 478 return nfsd4_open(rqstp, cstate, &op->u); 479 } 480 481 /* 482 * filehandle-manipulating ops. 483 */ 484 static __be32 485 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 486 union nfsd4_op_u *u) 487 { 488 u->getfh = &cstate->current_fh; 489 return nfs_ok; 490 } 491 492 static __be32 493 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 494 union nfsd4_op_u *u) 495 { 496 struct nfsd4_putfh *putfh = &u->putfh; 497 498 fh_put(&cstate->current_fh); 499 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 500 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 501 putfh->pf_fhlen); 502 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 503 } 504 505 static __be32 506 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 507 union nfsd4_op_u *u) 508 { 509 __be32 status; 510 511 fh_put(&cstate->current_fh); 512 status = exp_pseudoroot(rqstp, &cstate->current_fh); 513 return status; 514 } 515 516 static __be32 517 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 518 union nfsd4_op_u *u) 519 { 520 if (!cstate->save_fh.fh_dentry) 521 return nfserr_restorefh; 522 523 fh_dup2(&cstate->current_fh, &cstate->save_fh); 524 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 525 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 526 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 527 } 528 return nfs_ok; 529 } 530 531 static __be32 532 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 533 union nfsd4_op_u *u) 534 { 535 fh_dup2(&cstate->save_fh, &cstate->current_fh); 536 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 537 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 538 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 539 } 540 return nfs_ok; 541 } 542 543 /* 544 * misc nfsv4 ops 545 */ 546 static __be32 547 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 548 union nfsd4_op_u *u) 549 { 550 struct nfsd4_access *access = &u->access; 551 552 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 553 return nfserr_inval; 554 555 access->ac_resp_access = access->ac_req_access; 556 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 557 &access->ac_supported); 558 } 559 560 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 561 { 562 __be32 verf[2]; 563 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 564 565 /* 566 * This is opaque to client, so no need to byte-swap. Use 567 * __force to keep sparse happy. y2038 time_t overflow is 568 * irrelevant in this usage. 569 */ 570 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec; 571 verf[1] = (__force __be32)nn->nfssvc_boot.tv_nsec; 572 memcpy(verifier->data, verf, sizeof(verifier->data)); 573 } 574 575 static __be32 576 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 577 union nfsd4_op_u *u) 578 { 579 struct nfsd4_commit *commit = &u->commit; 580 581 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 582 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 583 commit->co_count); 584 } 585 586 static __be32 587 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 588 union nfsd4_op_u *u) 589 { 590 struct nfsd4_create *create = &u->create; 591 struct svc_fh resfh; 592 __be32 status; 593 dev_t rdev; 594 595 fh_init(&resfh, NFS4_FHSIZE); 596 597 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP); 598 if (status) 599 return status; 600 601 status = check_attr_support(rqstp, cstate, create->cr_bmval, 602 nfsd_attrmask); 603 if (status) 604 return status; 605 606 switch (create->cr_type) { 607 case NF4LNK: 608 status = nfsd_symlink(rqstp, &cstate->current_fh, 609 create->cr_name, create->cr_namelen, 610 create->cr_data, &resfh); 611 break; 612 613 case NF4BLK: 614 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 615 if (MAJOR(rdev) != create->cr_specdata1 || 616 MINOR(rdev) != create->cr_specdata2) 617 return nfserr_inval; 618 status = nfsd_create(rqstp, &cstate->current_fh, 619 create->cr_name, create->cr_namelen, 620 &create->cr_iattr, S_IFBLK, rdev, &resfh); 621 break; 622 623 case NF4CHR: 624 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 625 if (MAJOR(rdev) != create->cr_specdata1 || 626 MINOR(rdev) != create->cr_specdata2) 627 return nfserr_inval; 628 status = nfsd_create(rqstp, &cstate->current_fh, 629 create->cr_name, create->cr_namelen, 630 &create->cr_iattr,S_IFCHR, rdev, &resfh); 631 break; 632 633 case NF4SOCK: 634 status = nfsd_create(rqstp, &cstate->current_fh, 635 create->cr_name, create->cr_namelen, 636 &create->cr_iattr, S_IFSOCK, 0, &resfh); 637 break; 638 639 case NF4FIFO: 640 status = nfsd_create(rqstp, &cstate->current_fh, 641 create->cr_name, create->cr_namelen, 642 &create->cr_iattr, S_IFIFO, 0, &resfh); 643 break; 644 645 case NF4DIR: 646 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 647 status = nfsd_create(rqstp, &cstate->current_fh, 648 create->cr_name, create->cr_namelen, 649 &create->cr_iattr, S_IFDIR, 0, &resfh); 650 break; 651 652 default: 653 status = nfserr_badtype; 654 } 655 656 if (status) 657 goto out; 658 659 if (create->cr_label.len) 660 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 661 662 if (create->cr_acl != NULL) 663 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 664 create->cr_bmval); 665 666 fh_unlock(&cstate->current_fh); 667 set_change_info(&create->cr_cinfo, &cstate->current_fh); 668 fh_dup2(&cstate->current_fh, &resfh); 669 out: 670 fh_put(&resfh); 671 return status; 672 } 673 674 static __be32 675 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 676 union nfsd4_op_u *u) 677 { 678 struct nfsd4_getattr *getattr = &u->getattr; 679 __be32 status; 680 681 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 682 if (status) 683 return status; 684 685 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 686 return nfserr_inval; 687 688 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 689 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 690 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 691 692 getattr->ga_fhp = &cstate->current_fh; 693 return nfs_ok; 694 } 695 696 static __be32 697 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 698 union nfsd4_op_u *u) 699 { 700 struct nfsd4_link *link = &u->link; 701 __be32 status; 702 703 status = nfsd_link(rqstp, &cstate->current_fh, 704 link->li_name, link->li_namelen, &cstate->save_fh); 705 if (!status) 706 set_change_info(&link->li_cinfo, &cstate->current_fh); 707 return status; 708 } 709 710 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 711 { 712 struct svc_fh tmp_fh; 713 __be32 ret; 714 715 fh_init(&tmp_fh, NFS4_FHSIZE); 716 ret = exp_pseudoroot(rqstp, &tmp_fh); 717 if (ret) 718 return ret; 719 if (tmp_fh.fh_dentry == fh->fh_dentry) { 720 fh_put(&tmp_fh); 721 return nfserr_noent; 722 } 723 fh_put(&tmp_fh); 724 return nfsd_lookup(rqstp, fh, "..", 2, fh); 725 } 726 727 static __be32 728 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 729 union nfsd4_op_u *u) 730 { 731 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 732 } 733 734 static __be32 735 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 736 union nfsd4_op_u *u) 737 { 738 return nfsd_lookup(rqstp, &cstate->current_fh, 739 u->lookup.lo_name, u->lookup.lo_len, 740 &cstate->current_fh); 741 } 742 743 static __be32 744 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 745 union nfsd4_op_u *u) 746 { 747 struct nfsd4_read *read = &u->read; 748 __be32 status; 749 750 read->rd_filp = NULL; 751 if (read->rd_offset >= OFFSET_MAX) 752 return nfserr_inval; 753 754 /* 755 * If we do a zero copy read, then a client will see read data 756 * that reflects the state of the file *after* performing the 757 * following compound. 758 * 759 * To ensure proper ordering, we therefore turn off zero copy if 760 * the client wants us to do more in this compound: 761 */ 762 if (!nfsd4_last_compound_op(rqstp)) 763 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 764 765 /* check stateid */ 766 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 767 &read->rd_stateid, RD_STATE, 768 &read->rd_filp, &read->rd_tmp_file); 769 if (status) { 770 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 771 goto out; 772 } 773 status = nfs_ok; 774 out: 775 read->rd_rqstp = rqstp; 776 read->rd_fhp = &cstate->current_fh; 777 return status; 778 } 779 780 781 static void 782 nfsd4_read_release(union nfsd4_op_u *u) 783 { 784 if (u->read.rd_filp) 785 fput(u->read.rd_filp); 786 } 787 788 static __be32 789 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 790 union nfsd4_op_u *u) 791 { 792 struct nfsd4_readdir *readdir = &u->readdir; 793 u64 cookie = readdir->rd_cookie; 794 static const nfs4_verifier zeroverf; 795 796 /* no need to check permission - this will be done in nfsd_readdir() */ 797 798 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 799 return nfserr_inval; 800 801 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 802 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 803 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 804 805 if ((cookie == 1) || (cookie == 2) || 806 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 807 return nfserr_bad_cookie; 808 809 readdir->rd_rqstp = rqstp; 810 readdir->rd_fhp = &cstate->current_fh; 811 return nfs_ok; 812 } 813 814 static __be32 815 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 816 union nfsd4_op_u *u) 817 { 818 u->readlink.rl_rqstp = rqstp; 819 u->readlink.rl_fhp = &cstate->current_fh; 820 return nfs_ok; 821 } 822 823 static __be32 824 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 825 union nfsd4_op_u *u) 826 { 827 struct nfsd4_remove *remove = &u->remove; 828 __be32 status; 829 830 if (opens_in_grace(SVC_NET(rqstp))) 831 return nfserr_grace; 832 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 833 remove->rm_name, remove->rm_namelen); 834 if (!status) { 835 fh_unlock(&cstate->current_fh); 836 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 837 } 838 return status; 839 } 840 841 static __be32 842 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 843 union nfsd4_op_u *u) 844 { 845 struct nfsd4_rename *rename = &u->rename; 846 __be32 status; 847 848 if (opens_in_grace(SVC_NET(rqstp)) && 849 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 850 return nfserr_grace; 851 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 852 rename->rn_snamelen, &cstate->current_fh, 853 rename->rn_tname, rename->rn_tnamelen); 854 if (status) 855 return status; 856 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 857 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 858 return nfs_ok; 859 } 860 861 static __be32 862 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 863 union nfsd4_op_u *u) 864 { 865 struct nfsd4_secinfo *secinfo = &u->secinfo; 866 struct svc_export *exp; 867 struct dentry *dentry; 868 __be32 err; 869 870 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 871 if (err) 872 return err; 873 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 874 secinfo->si_name, secinfo->si_namelen, 875 &exp, &dentry); 876 if (err) 877 return err; 878 fh_unlock(&cstate->current_fh); 879 if (d_really_is_negative(dentry)) { 880 exp_put(exp); 881 err = nfserr_noent; 882 } else 883 secinfo->si_exp = exp; 884 dput(dentry); 885 if (cstate->minorversion) 886 /* See rfc 5661 section 2.6.3.1.1.8 */ 887 fh_put(&cstate->current_fh); 888 return err; 889 } 890 891 static __be32 892 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 893 union nfsd4_op_u *u) 894 { 895 __be32 err; 896 897 switch (u->secinfo_no_name.sin_style) { 898 case NFS4_SECINFO_STYLE4_CURRENT_FH: 899 break; 900 case NFS4_SECINFO_STYLE4_PARENT: 901 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 902 if (err) 903 return err; 904 break; 905 default: 906 return nfserr_inval; 907 } 908 909 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export); 910 fh_put(&cstate->current_fh); 911 return nfs_ok; 912 } 913 914 static void 915 nfsd4_secinfo_release(union nfsd4_op_u *u) 916 { 917 if (u->secinfo.si_exp) 918 exp_put(u->secinfo.si_exp); 919 } 920 921 static void 922 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u) 923 { 924 if (u->secinfo_no_name.sin_exp) 925 exp_put(u->secinfo_no_name.sin_exp); 926 } 927 928 static __be32 929 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 930 union nfsd4_op_u *u) 931 { 932 struct nfsd4_setattr *setattr = &u->setattr; 933 __be32 status = nfs_ok; 934 int err; 935 936 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 937 status = nfs4_preprocess_stateid_op(rqstp, cstate, 938 &cstate->current_fh, &setattr->sa_stateid, 939 WR_STATE, NULL, NULL); 940 if (status) { 941 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 942 return status; 943 } 944 } 945 err = fh_want_write(&cstate->current_fh); 946 if (err) 947 return nfserrno(err); 948 status = nfs_ok; 949 950 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 951 nfsd_attrmask); 952 if (status) 953 goto out; 954 955 if (setattr->sa_acl != NULL) 956 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 957 setattr->sa_acl); 958 if (status) 959 goto out; 960 if (setattr->sa_label.len) 961 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 962 &setattr->sa_label); 963 if (status) 964 goto out; 965 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 966 0, (time_t)0); 967 out: 968 fh_drop_write(&cstate->current_fh); 969 return status; 970 } 971 972 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 973 { 974 int i = 1; 975 int buflen = write->wr_buflen; 976 977 vec[0].iov_base = write->wr_head.iov_base; 978 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 979 buflen -= vec[0].iov_len; 980 981 while (buflen) { 982 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 983 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 984 buflen -= vec[i].iov_len; 985 i++; 986 } 987 return i; 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 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1005 stateid, WR_STATE, &filp, NULL); 1006 if (status) { 1007 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 1008 return status; 1009 } 1010 1011 cnt = write->wr_buflen; 1012 write->wr_how_written = write->wr_stable_how; 1013 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 1014 1015 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1016 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1017 1018 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp, 1019 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 1020 write->wr_how_written); 1021 fput(filp); 1022 1023 write->wr_bytes_written = cnt; 1024 1025 return status; 1026 } 1027 1028 static __be32 1029 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1030 stateid_t *src_stateid, struct file **src, 1031 stateid_t *dst_stateid, struct file **dst) 1032 { 1033 __be32 status; 1034 1035 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, 1036 src_stateid, RD_STATE, src, NULL); 1037 if (status) { 1038 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); 1039 goto out; 1040 } 1041 1042 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1043 dst_stateid, WR_STATE, dst, NULL); 1044 if (status) { 1045 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); 1046 goto out_put_src; 1047 } 1048 1049 /* fix up for NFS-specific error code */ 1050 if (!S_ISREG(file_inode(*src)->i_mode) || 1051 !S_ISREG(file_inode(*dst)->i_mode)) { 1052 status = nfserr_wrong_type; 1053 goto out_put_dst; 1054 } 1055 1056 out: 1057 return status; 1058 out_put_dst: 1059 fput(*dst); 1060 out_put_src: 1061 fput(*src); 1062 goto out; 1063 } 1064 1065 static __be32 1066 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1067 union nfsd4_op_u *u) 1068 { 1069 struct nfsd4_clone *clone = &u->clone; 1070 struct file *src, *dst; 1071 __be32 status; 1072 1073 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src, 1074 &clone->cl_dst_stateid, &dst); 1075 if (status) 1076 goto out; 1077 1078 status = nfsd4_clone_file_range(src, clone->cl_src_pos, 1079 dst, clone->cl_dst_pos, clone->cl_count); 1080 1081 fput(dst); 1082 fput(src); 1083 out: 1084 return status; 1085 } 1086 1087 static __be32 1088 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1089 union nfsd4_op_u *u) 1090 { 1091 struct nfsd4_copy *copy = &u->copy; 1092 struct file *src, *dst; 1093 __be32 status; 1094 ssize_t bytes; 1095 1096 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, &src, 1097 ©->cp_dst_stateid, &dst); 1098 if (status) 1099 goto out; 1100 1101 bytes = nfsd_copy_file_range(src, copy->cp_src_pos, 1102 dst, copy->cp_dst_pos, copy->cp_count); 1103 1104 if (bytes < 0) 1105 status = nfserrno(bytes); 1106 else { 1107 copy->cp_res.wr_bytes_written = bytes; 1108 copy->cp_res.wr_stable_how = NFS_UNSTABLE; 1109 copy->cp_consecutive = 1; 1110 copy->cp_synchronous = 1; 1111 gen_boot_verifier(©->cp_res.wr_verifier, SVC_NET(rqstp)); 1112 status = nfs_ok; 1113 } 1114 1115 fput(src); 1116 fput(dst); 1117 out: 1118 return status; 1119 } 1120 1121 static __be32 1122 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1123 struct nfsd4_fallocate *fallocate, int flags) 1124 { 1125 __be32 status = nfserr_notsupp; 1126 struct file *file; 1127 1128 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1129 &fallocate->falloc_stateid, 1130 WR_STATE, &file, NULL); 1131 if (status != nfs_ok) { 1132 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1133 return status; 1134 } 1135 1136 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file, 1137 fallocate->falloc_offset, 1138 fallocate->falloc_length, 1139 flags); 1140 fput(file); 1141 return status; 1142 } 1143 1144 static __be32 1145 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1146 union nfsd4_op_u *u) 1147 { 1148 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0); 1149 } 1150 1151 static __be32 1152 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1153 union nfsd4_op_u *u) 1154 { 1155 return nfsd4_fallocate(rqstp, cstate, &u->deallocate, 1156 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1157 } 1158 1159 static __be32 1160 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1161 union nfsd4_op_u *u) 1162 { 1163 struct nfsd4_seek *seek = &u->seek; 1164 int whence; 1165 __be32 status; 1166 struct file *file; 1167 1168 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1169 &seek->seek_stateid, 1170 RD_STATE, &file, NULL); 1171 if (status) { 1172 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1173 return status; 1174 } 1175 1176 switch (seek->seek_whence) { 1177 case NFS4_CONTENT_DATA: 1178 whence = SEEK_DATA; 1179 break; 1180 case NFS4_CONTENT_HOLE: 1181 whence = SEEK_HOLE; 1182 break; 1183 default: 1184 status = nfserr_union_notsupp; 1185 goto out; 1186 } 1187 1188 /* 1189 * Note: This call does change file->f_pos, but nothing in NFSD 1190 * should ever file->f_pos. 1191 */ 1192 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); 1193 if (seek->seek_pos < 0) 1194 status = nfserrno(seek->seek_pos); 1195 else if (seek->seek_pos >= i_size_read(file_inode(file))) 1196 seek->seek_eof = true; 1197 1198 out: 1199 fput(file); 1200 return status; 1201 } 1202 1203 /* This routine never returns NFS_OK! If there are no other errors, it 1204 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1205 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1206 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1207 */ 1208 static __be32 1209 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1210 struct nfsd4_verify *verify) 1211 { 1212 __be32 *buf, *p; 1213 int count; 1214 __be32 status; 1215 1216 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1217 if (status) 1218 return status; 1219 1220 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1221 if (status) 1222 return status; 1223 1224 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1225 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1226 return nfserr_inval; 1227 if (verify->ve_attrlen & 3) 1228 return nfserr_inval; 1229 1230 /* count in words: 1231 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1232 */ 1233 count = 4 + (verify->ve_attrlen >> 2); 1234 buf = kmalloc(count << 2, GFP_KERNEL); 1235 if (!buf) 1236 return nfserr_jukebox; 1237 1238 p = buf; 1239 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1240 cstate->current_fh.fh_export, 1241 cstate->current_fh.fh_dentry, 1242 verify->ve_bmval, 1243 rqstp, 0); 1244 /* 1245 * If nfsd4_encode_fattr() ran out of space, assume that's because 1246 * the attributes are longer (hence different) than those given: 1247 */ 1248 if (status == nfserr_resource) 1249 status = nfserr_not_same; 1250 if (status) 1251 goto out_kfree; 1252 1253 /* skip bitmap */ 1254 p = buf + 1 + ntohl(buf[0]); 1255 status = nfserr_not_same; 1256 if (ntohl(*p++) != verify->ve_attrlen) 1257 goto out_kfree; 1258 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1259 status = nfserr_same; 1260 1261 out_kfree: 1262 kfree(buf); 1263 return status; 1264 } 1265 1266 static __be32 1267 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1268 union nfsd4_op_u *u) 1269 { 1270 __be32 status; 1271 1272 status = _nfsd4_verify(rqstp, cstate, &u->verify); 1273 return status == nfserr_not_same ? nfs_ok : status; 1274 } 1275 1276 static __be32 1277 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1278 union nfsd4_op_u *u) 1279 { 1280 __be32 status; 1281 1282 status = _nfsd4_verify(rqstp, cstate, &u->nverify); 1283 return status == nfserr_same ? nfs_ok : status; 1284 } 1285 1286 #ifdef CONFIG_NFSD_PNFS 1287 static const struct nfsd4_layout_ops * 1288 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1289 { 1290 if (!exp->ex_layout_types) { 1291 dprintk("%s: export does not support pNFS\n", __func__); 1292 return NULL; 1293 } 1294 1295 if (layout_type >= LAYOUT_TYPE_MAX || 1296 !(exp->ex_layout_types & (1 << layout_type))) { 1297 dprintk("%s: layout type %d not supported\n", 1298 __func__, layout_type); 1299 return NULL; 1300 } 1301 1302 return nfsd4_layout_ops[layout_type]; 1303 } 1304 1305 static __be32 1306 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1307 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1308 { 1309 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo; 1310 const struct nfsd4_layout_ops *ops; 1311 struct nfsd4_deviceid_map *map; 1312 struct svc_export *exp; 1313 __be32 nfserr; 1314 1315 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1316 __func__, 1317 gdp->gd_layout_type, 1318 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1319 gdp->gd_maxcount); 1320 1321 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1322 if (!map) { 1323 dprintk("%s: couldn't find device ID to export mapping!\n", 1324 __func__); 1325 return nfserr_noent; 1326 } 1327 1328 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1329 if (IS_ERR(exp)) { 1330 dprintk("%s: could not find device id\n", __func__); 1331 return nfserr_noent; 1332 } 1333 1334 nfserr = nfserr_layoutunavailable; 1335 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1336 if (!ops) 1337 goto out; 1338 1339 nfserr = nfs_ok; 1340 if (gdp->gd_maxcount != 0) { 1341 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1342 rqstp, cstate->session->se_client, gdp); 1343 } 1344 1345 gdp->gd_notify_types &= ops->notify_types; 1346 out: 1347 exp_put(exp); 1348 return nfserr; 1349 } 1350 1351 static void 1352 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u) 1353 { 1354 kfree(u->getdeviceinfo.gd_device); 1355 } 1356 1357 static __be32 1358 nfsd4_layoutget(struct svc_rqst *rqstp, 1359 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1360 { 1361 struct nfsd4_layoutget *lgp = &u->layoutget; 1362 struct svc_fh *current_fh = &cstate->current_fh; 1363 const struct nfsd4_layout_ops *ops; 1364 struct nfs4_layout_stateid *ls; 1365 __be32 nfserr; 1366 int accmode; 1367 1368 switch (lgp->lg_seg.iomode) { 1369 case IOMODE_READ: 1370 accmode = NFSD_MAY_READ; 1371 break; 1372 case IOMODE_RW: 1373 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE; 1374 break; 1375 default: 1376 dprintk("%s: invalid iomode %d\n", 1377 __func__, lgp->lg_seg.iomode); 1378 nfserr = nfserr_badiomode; 1379 goto out; 1380 } 1381 1382 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1383 if (nfserr) 1384 goto out; 1385 1386 nfserr = nfserr_layoutunavailable; 1387 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1388 if (!ops) 1389 goto out; 1390 1391 /* 1392 * Verify minlength and range as per RFC5661: 1393 * o If loga_length is less than loga_minlength, 1394 * the metadata server MUST return NFS4ERR_INVAL. 1395 * o If the sum of loga_offset and loga_minlength exceeds 1396 * NFS4_UINT64_MAX, and loga_minlength is not 1397 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1398 * o If the sum of loga_offset and loga_length exceeds 1399 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1400 * the error NFS4ERR_INVAL MUST result. 1401 */ 1402 nfserr = nfserr_inval; 1403 if (lgp->lg_seg.length < lgp->lg_minlength || 1404 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1405 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1406 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1407 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1408 goto out; 1409 if (lgp->lg_seg.length == 0) 1410 goto out; 1411 1412 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1413 true, lgp->lg_layout_type, &ls); 1414 if (nfserr) { 1415 trace_layout_get_lookup_fail(&lgp->lg_sid); 1416 goto out; 1417 } 1418 1419 nfserr = nfserr_recallconflict; 1420 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1421 goto out_put_stid; 1422 1423 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1424 current_fh, lgp); 1425 if (nfserr) 1426 goto out_put_stid; 1427 1428 nfserr = nfsd4_insert_layout(lgp, ls); 1429 1430 out_put_stid: 1431 mutex_unlock(&ls->ls_mutex); 1432 nfs4_put_stid(&ls->ls_stid); 1433 out: 1434 return nfserr; 1435 } 1436 1437 static void 1438 nfsd4_layoutget_release(union nfsd4_op_u *u) 1439 { 1440 kfree(u->layoutget.lg_content); 1441 } 1442 1443 static __be32 1444 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1445 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1446 { 1447 struct nfsd4_layoutcommit *lcp = &u->layoutcommit; 1448 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1449 struct svc_fh *current_fh = &cstate->current_fh; 1450 const struct nfsd4_layout_ops *ops; 1451 loff_t new_size = lcp->lc_last_wr + 1; 1452 struct inode *inode; 1453 struct nfs4_layout_stateid *ls; 1454 __be32 nfserr; 1455 1456 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 1457 if (nfserr) 1458 goto out; 1459 1460 nfserr = nfserr_layoutunavailable; 1461 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 1462 if (!ops) 1463 goto out; 1464 inode = d_inode(current_fh->fh_dentry); 1465 1466 nfserr = nfserr_inval; 1467 if (new_size <= seg->offset) { 1468 dprintk("pnfsd: last write before layout segment\n"); 1469 goto out; 1470 } 1471 if (new_size > seg->offset + seg->length) { 1472 dprintk("pnfsd: last write beyond layout segment\n"); 1473 goto out; 1474 } 1475 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 1476 dprintk("pnfsd: layoutcommit beyond EOF\n"); 1477 goto out; 1478 } 1479 1480 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 1481 false, lcp->lc_layout_type, 1482 &ls); 1483 if (nfserr) { 1484 trace_layout_commit_lookup_fail(&lcp->lc_sid); 1485 /* fixup error code as per RFC5661 */ 1486 if (nfserr == nfserr_bad_stateid) 1487 nfserr = nfserr_badlayout; 1488 goto out; 1489 } 1490 1491 /* LAYOUTCOMMIT does not require any serialization */ 1492 mutex_unlock(&ls->ls_mutex); 1493 1494 if (new_size > i_size_read(inode)) { 1495 lcp->lc_size_chg = 1; 1496 lcp->lc_newsize = new_size; 1497 } else { 1498 lcp->lc_size_chg = 0; 1499 } 1500 1501 nfserr = ops->proc_layoutcommit(inode, lcp); 1502 nfs4_put_stid(&ls->ls_stid); 1503 out: 1504 return nfserr; 1505 } 1506 1507 static __be32 1508 nfsd4_layoutreturn(struct svc_rqst *rqstp, 1509 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1510 { 1511 struct nfsd4_layoutreturn *lrp = &u->layoutreturn; 1512 struct svc_fh *current_fh = &cstate->current_fh; 1513 __be32 nfserr; 1514 1515 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 1516 if (nfserr) 1517 goto out; 1518 1519 nfserr = nfserr_layoutunavailable; 1520 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 1521 goto out; 1522 1523 switch (lrp->lr_seg.iomode) { 1524 case IOMODE_READ: 1525 case IOMODE_RW: 1526 case IOMODE_ANY: 1527 break; 1528 default: 1529 dprintk("%s: invalid iomode %d\n", __func__, 1530 lrp->lr_seg.iomode); 1531 nfserr = nfserr_inval; 1532 goto out; 1533 } 1534 1535 switch (lrp->lr_return_type) { 1536 case RETURN_FILE: 1537 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 1538 break; 1539 case RETURN_FSID: 1540 case RETURN_ALL: 1541 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 1542 break; 1543 default: 1544 dprintk("%s: invalid return_type %d\n", __func__, 1545 lrp->lr_return_type); 1546 nfserr = nfserr_inval; 1547 break; 1548 } 1549 out: 1550 return nfserr; 1551 } 1552 #endif /* CONFIG_NFSD_PNFS */ 1553 1554 /* 1555 * NULL call. 1556 */ 1557 static __be32 1558 nfsd4_proc_null(struct svc_rqst *rqstp) 1559 { 1560 return nfs_ok; 1561 } 1562 1563 static inline void nfsd4_increment_op_stats(u32 opnum) 1564 { 1565 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1566 nfsdstats.nfs4_opcount[opnum]++; 1567 } 1568 1569 static const struct nfsd4_operation nfsd4_ops[]; 1570 1571 static const char *nfsd4_op_name(unsigned opnum); 1572 1573 /* 1574 * Enforce NFSv4.1 COMPOUND ordering rules: 1575 * 1576 * Also note, enforced elsewhere: 1577 * - SEQUENCE other than as first op results in 1578 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1579 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1580 * (Enforced in nfsd4_bind_conn_to_session().) 1581 * - DESTROY_SESSION must be the final operation in a compound, if 1582 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1583 * (Enforced in nfsd4_destroy_session().) 1584 */ 1585 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1586 { 1587 struct nfsd4_op *op = &args->ops[0]; 1588 1589 /* These ordering requirements don't apply to NFSv4.0: */ 1590 if (args->minorversion == 0) 1591 return nfs_ok; 1592 /* This is weird, but OK, not our problem: */ 1593 if (args->opcnt == 0) 1594 return nfs_ok; 1595 if (op->status == nfserr_op_illegal) 1596 return nfs_ok; 1597 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1598 return nfserr_op_not_in_session; 1599 if (op->opnum == OP_SEQUENCE) 1600 return nfs_ok; 1601 if (args->opcnt != 1) 1602 return nfserr_not_only_op; 1603 return nfs_ok; 1604 } 1605 1606 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1607 { 1608 return &nfsd4_ops[op->opnum]; 1609 } 1610 1611 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1612 { 1613 if (op->opnum == OP_ILLEGAL) 1614 return false; 1615 return OPDESC(op)->op_flags & OP_CACHEME; 1616 } 1617 1618 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1619 { 1620 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1621 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1622 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1623 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1624 const struct nfsd4_operation *thisd = OPDESC(this); 1625 const struct nfsd4_operation *nextd; 1626 1627 /* 1628 * Most ops check wronsec on our own; only the putfh-like ops 1629 * have special rules. 1630 */ 1631 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1632 return false; 1633 /* 1634 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1635 * put-filehandle operation if we're not going to use the 1636 * result: 1637 */ 1638 if (argp->opcnt == resp->opcnt) 1639 return false; 1640 if (next->opnum == OP_ILLEGAL) 1641 return false; 1642 nextd = OPDESC(next); 1643 /* 1644 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1645 * errors themselves as necessary; others should check for them 1646 * now: 1647 */ 1648 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1649 } 1650 1651 static void svcxdr_init_encode(struct svc_rqst *rqstp, 1652 struct nfsd4_compoundres *resp) 1653 { 1654 struct xdr_stream *xdr = &resp->xdr; 1655 struct xdr_buf *buf = &rqstp->rq_res; 1656 struct kvec *head = buf->head; 1657 1658 xdr->buf = buf; 1659 xdr->iov = head; 1660 xdr->p = head->iov_base + head->iov_len; 1661 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1662 /* Tail and page_len should be zero at this point: */ 1663 buf->len = buf->head[0].iov_len; 1664 xdr->scratch.iov_len = 0; 1665 xdr->page_ptr = buf->pages - 1; 1666 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1667 - rqstp->rq_auth_slack; 1668 } 1669 1670 /* 1671 * COMPOUND call. 1672 */ 1673 static __be32 1674 nfsd4_proc_compound(struct svc_rqst *rqstp) 1675 { 1676 struct nfsd4_compoundargs *args = rqstp->rq_argp; 1677 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1678 struct nfsd4_op *op; 1679 struct nfsd4_compound_state *cstate = &resp->cstate; 1680 struct svc_fh *current_fh = &cstate->current_fh; 1681 struct svc_fh *save_fh = &cstate->save_fh; 1682 __be32 status; 1683 1684 svcxdr_init_encode(rqstp, resp); 1685 resp->tagp = resp->xdr.p; 1686 /* reserve space for: taglen, tag, and opcnt */ 1687 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1688 resp->taglen = args->taglen; 1689 resp->tag = args->tag; 1690 resp->rqstp = rqstp; 1691 cstate->minorversion = args->minorversion; 1692 fh_init(current_fh, NFS4_FHSIZE); 1693 fh_init(save_fh, NFS4_FHSIZE); 1694 /* 1695 * Don't use the deferral mechanism for NFSv4; compounds make it 1696 * too hard to avoid non-idempotency problems. 1697 */ 1698 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1699 1700 /* 1701 * According to RFC3010, this takes precedence over all other errors. 1702 */ 1703 status = nfserr_minor_vers_mismatch; 1704 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1705 goto out; 1706 1707 status = nfs41_check_op_ordering(args); 1708 if (status) { 1709 op = &args->ops[0]; 1710 op->status = status; 1711 goto encode_op; 1712 } 1713 1714 while (!status && resp->opcnt < args->opcnt) { 1715 op = &args->ops[resp->opcnt++]; 1716 1717 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1718 resp->opcnt, args->opcnt, op->opnum, 1719 nfsd4_op_name(op->opnum)); 1720 /* 1721 * The XDR decode routines may have pre-set op->status; 1722 * for example, if there is a miscellaneous XDR error 1723 * it will be set to nfserr_bad_xdr. 1724 */ 1725 if (op->status) { 1726 if (op->opnum == OP_OPEN) 1727 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1728 goto encode_op; 1729 } 1730 1731 if (!current_fh->fh_dentry) { 1732 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1733 op->status = nfserr_nofilehandle; 1734 goto encode_op; 1735 } 1736 } else if (current_fh->fh_export->ex_fslocs.migrated && 1737 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1738 op->status = nfserr_moved; 1739 goto encode_op; 1740 } 1741 1742 fh_clear_wcc(current_fh); 1743 1744 /* If op is non-idempotent */ 1745 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1746 /* 1747 * Don't execute this op if we couldn't encode a 1748 * succesful reply: 1749 */ 1750 u32 plen = op->opdesc->op_rsize_bop(rqstp, op); 1751 /* 1752 * Plus if there's another operation, make sure 1753 * we'll have space to at least encode an error: 1754 */ 1755 if (resp->opcnt < args->opcnt) 1756 plen += COMPOUND_ERR_SLACK_SPACE; 1757 op->status = nfsd4_check_resp_size(resp, plen); 1758 } 1759 1760 if (op->status) 1761 goto encode_op; 1762 1763 if (op->opdesc->op_get_currentstateid) 1764 op->opdesc->op_get_currentstateid(cstate, &op->u); 1765 op->status = op->opdesc->op_func(rqstp, cstate, &op->u); 1766 1767 /* Only from SEQUENCE */ 1768 if (cstate->status == nfserr_replay_cache) { 1769 dprintk("%s NFS4.1 replay from cache\n", __func__); 1770 status = op->status; 1771 goto out; 1772 } 1773 if (!op->status) { 1774 if (op->opdesc->op_set_currentstateid) 1775 op->opdesc->op_set_currentstateid(cstate, &op->u); 1776 1777 if (op->opdesc->op_flags & OP_CLEAR_STATEID) 1778 clear_current_stateid(cstate); 1779 1780 if (need_wrongsec_check(rqstp)) 1781 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 1782 } 1783 encode_op: 1784 if (op->status == nfserr_replay_me) { 1785 op->replay = &cstate->replay_owner->so_replay; 1786 nfsd4_encode_replay(&resp->xdr, op); 1787 status = op->status = op->replay->rp_status; 1788 } else { 1789 nfsd4_encode_operation(resp, op); 1790 status = op->status; 1791 } 1792 1793 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1794 args->ops, args->opcnt, resp->opcnt, op->opnum, 1795 be32_to_cpu(status)); 1796 1797 nfsd4_cstate_clear_replay(cstate); 1798 nfsd4_increment_op_stats(op->opnum); 1799 } 1800 1801 cstate->status = status; 1802 fh_put(current_fh); 1803 fh_put(save_fh); 1804 BUG_ON(cstate->replay_owner); 1805 out: 1806 /* Reset deferral mechanism for RPC deferrals */ 1807 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1808 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1809 return status; 1810 } 1811 1812 #define op_encode_hdr_size (2) 1813 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1814 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1815 #define op_encode_change_info_maxsz (5) 1816 #define nfs4_fattr_bitmap_maxsz (4) 1817 1818 /* We'll fall back on returning no lockowner if run out of space: */ 1819 #define op_encode_lockowner_maxsz (0) 1820 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1821 1822 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1823 1824 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1825 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1826 op_encode_ace_maxsz) 1827 1828 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1829 1830 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1831 { 1832 return (op_encode_hdr_size) * sizeof(__be32); 1833 } 1834 1835 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1836 { 1837 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1838 } 1839 1840 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1841 { 1842 /* ac_supported, ac_resp_access */ 1843 return (op_encode_hdr_size + 2)* sizeof(__be32); 1844 } 1845 1846 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1847 { 1848 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1849 } 1850 1851 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1852 { 1853 return (op_encode_hdr_size + op_encode_change_info_maxsz 1854 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1855 } 1856 1857 /* 1858 * Note since this is an idempotent operation we won't insist on failing 1859 * the op prematurely if the estimate is too large. We may turn off splice 1860 * reads unnecessarily. 1861 */ 1862 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1863 struct nfsd4_op *op) 1864 { 1865 u32 *bmap = op->u.getattr.ga_bmval; 1866 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1867 u32 ret = 0; 1868 1869 if (bmap0 & FATTR4_WORD0_ACL) 1870 return svc_max_payload(rqstp); 1871 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1872 return svc_max_payload(rqstp); 1873 1874 if (bmap1 & FATTR4_WORD1_OWNER) { 1875 ret += IDMAP_NAMESZ + 4; 1876 bmap1 &= ~FATTR4_WORD1_OWNER; 1877 } 1878 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1879 ret += IDMAP_NAMESZ + 4; 1880 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1881 } 1882 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1883 ret += NFS4_FHSIZE + 4; 1884 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1885 } 1886 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1887 ret += NFS4_MAXLABELLEN + 12; 1888 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1889 } 1890 /* 1891 * Largest of remaining attributes are 16 bytes (e.g., 1892 * supported_attributes) 1893 */ 1894 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1895 /* bitmask, length */ 1896 ret += 20; 1897 return ret; 1898 } 1899 1900 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1901 { 1902 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE; 1903 } 1904 1905 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1906 { 1907 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1908 * sizeof(__be32); 1909 } 1910 1911 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1912 { 1913 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1914 * sizeof(__be32); 1915 } 1916 1917 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1918 { 1919 return (op_encode_hdr_size + op_encode_stateid_maxsz 1920 + op_encode_change_info_maxsz + 1 1921 + nfs4_fattr_bitmap_maxsz 1922 + op_encode_delegation_maxsz) * sizeof(__be32); 1923 } 1924 1925 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1926 { 1927 u32 maxcount = 0, rlen = 0; 1928 1929 maxcount = svc_max_payload(rqstp); 1930 rlen = min(op->u.read.rd_length, maxcount); 1931 1932 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1933 } 1934 1935 static inline u32 nfsd4_readdir_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.readdir.rd_maxcount, maxcount); 1941 1942 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1943 XDR_QUADLEN(rlen)) * sizeof(__be32); 1944 } 1945 1946 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1947 { 1948 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE; 1949 } 1950 1951 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1952 { 1953 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1954 * sizeof(__be32); 1955 } 1956 1957 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1958 { 1959 return (op_encode_hdr_size + op_encode_change_info_maxsz 1960 + op_encode_change_info_maxsz) * sizeof(__be32); 1961 } 1962 1963 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1964 struct nfsd4_op *op) 1965 { 1966 return (op_encode_hdr_size 1967 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 1968 } 1969 1970 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1971 { 1972 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids) 1973 * sizeof(__be32); 1974 } 1975 1976 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1977 { 1978 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1979 } 1980 1981 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1982 { 1983 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR * 1984 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32); 1985 } 1986 1987 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1988 { 1989 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1990 sizeof(__be32); 1991 } 1992 1993 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1994 { 1995 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 1996 } 1997 1998 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1999 { 2000 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 2001 1 + 1 + /* eir_flags, spr_how */\ 2002 4 + /* spo_must_enforce & _allow with bitmap */\ 2003 2 + /*eir_server_owner.so_minor_id */\ 2004 /* eir_server_owner.so_major_id<> */\ 2005 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2006 /* eir_server_scope<> */\ 2007 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2008 1 + /* eir_server_impl_id array length */\ 2009 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 2010 } 2011 2012 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2013 { 2014 return (op_encode_hdr_size + \ 2015 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 2016 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 2017 } 2018 2019 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2020 { 2021 return (op_encode_hdr_size + \ 2022 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 2023 2 + /* csr_sequence, csr_flags */\ 2024 op_encode_channel_attrs_maxsz + \ 2025 op_encode_channel_attrs_maxsz) * sizeof(__be32); 2026 } 2027 2028 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2029 { 2030 return (op_encode_hdr_size + 2031 1 /* wr_callback */ + 2032 op_encode_stateid_maxsz /* wr_callback */ + 2033 2 /* wr_count */ + 2034 1 /* wr_committed */ + 2035 op_encode_verifier_maxsz + 2036 1 /* cr_consecutive */ + 2037 1 /* cr_synchronous */) * sizeof(__be32); 2038 } 2039 2040 #ifdef CONFIG_NFSD_PNFS 2041 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2042 { 2043 u32 maxcount = 0, rlen = 0; 2044 2045 maxcount = svc_max_payload(rqstp); 2046 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount); 2047 2048 return (op_encode_hdr_size + 2049 1 /* gd_layout_type*/ + 2050 XDR_QUADLEN(rlen) + 2051 2 /* gd_notify_types */) * sizeof(__be32); 2052 } 2053 2054 /* 2055 * At this stage we don't really know what layout driver will handle the request, 2056 * so we need to define an arbitrary upper bound here. 2057 */ 2058 #define MAX_LAYOUT_SIZE 128 2059 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2060 { 2061 return (op_encode_hdr_size + 2062 1 /* logr_return_on_close */ + 2063 op_encode_stateid_maxsz + 2064 1 /* nr of layouts */ + 2065 MAX_LAYOUT_SIZE) * sizeof(__be32); 2066 } 2067 2068 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2069 { 2070 return (op_encode_hdr_size + 2071 1 /* locr_newsize */ + 2072 2 /* ns_size */) * sizeof(__be32); 2073 } 2074 2075 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2076 { 2077 return (op_encode_hdr_size + 2078 1 /* lrs_stateid */ + 2079 op_encode_stateid_maxsz) * sizeof(__be32); 2080 } 2081 #endif /* CONFIG_NFSD_PNFS */ 2082 2083 2084 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2085 { 2086 return (op_encode_hdr_size + 3) * sizeof(__be32); 2087 } 2088 2089 static const struct nfsd4_operation nfsd4_ops[] = { 2090 [OP_ACCESS] = { 2091 .op_func = nfsd4_access, 2092 .op_name = "OP_ACCESS", 2093 .op_rsize_bop = nfsd4_access_rsize, 2094 }, 2095 [OP_CLOSE] = { 2096 .op_func = nfsd4_close, 2097 .op_flags = OP_MODIFIES_SOMETHING, 2098 .op_name = "OP_CLOSE", 2099 .op_rsize_bop = nfsd4_status_stateid_rsize, 2100 .op_get_currentstateid = nfsd4_get_closestateid, 2101 .op_set_currentstateid = nfsd4_set_closestateid, 2102 }, 2103 [OP_COMMIT] = { 2104 .op_func = nfsd4_commit, 2105 .op_flags = OP_MODIFIES_SOMETHING, 2106 .op_name = "OP_COMMIT", 2107 .op_rsize_bop = nfsd4_commit_rsize, 2108 }, 2109 [OP_CREATE] = { 2110 .op_func = nfsd4_create, 2111 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2112 .op_name = "OP_CREATE", 2113 .op_rsize_bop = nfsd4_create_rsize, 2114 }, 2115 [OP_DELEGRETURN] = { 2116 .op_func = nfsd4_delegreturn, 2117 .op_flags = OP_MODIFIES_SOMETHING, 2118 .op_name = "OP_DELEGRETURN", 2119 .op_rsize_bop = nfsd4_only_status_rsize, 2120 .op_get_currentstateid = nfsd4_get_delegreturnstateid, 2121 }, 2122 [OP_GETATTR] = { 2123 .op_func = nfsd4_getattr, 2124 .op_flags = ALLOWED_ON_ABSENT_FS, 2125 .op_rsize_bop = nfsd4_getattr_rsize, 2126 .op_name = "OP_GETATTR", 2127 }, 2128 [OP_GETFH] = { 2129 .op_func = nfsd4_getfh, 2130 .op_name = "OP_GETFH", 2131 .op_rsize_bop = nfsd4_getfh_rsize, 2132 }, 2133 [OP_LINK] = { 2134 .op_func = nfsd4_link, 2135 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2136 | OP_CACHEME, 2137 .op_name = "OP_LINK", 2138 .op_rsize_bop = nfsd4_link_rsize, 2139 }, 2140 [OP_LOCK] = { 2141 .op_func = nfsd4_lock, 2142 .op_flags = OP_MODIFIES_SOMETHING | 2143 OP_NONTRIVIAL_ERROR_ENCODE, 2144 .op_name = "OP_LOCK", 2145 .op_rsize_bop = nfsd4_lock_rsize, 2146 .op_set_currentstateid = nfsd4_set_lockstateid, 2147 }, 2148 [OP_LOCKT] = { 2149 .op_func = nfsd4_lockt, 2150 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE, 2151 .op_name = "OP_LOCKT", 2152 .op_rsize_bop = nfsd4_lock_rsize, 2153 }, 2154 [OP_LOCKU] = { 2155 .op_func = nfsd4_locku, 2156 .op_flags = OP_MODIFIES_SOMETHING, 2157 .op_name = "OP_LOCKU", 2158 .op_rsize_bop = nfsd4_status_stateid_rsize, 2159 .op_get_currentstateid = nfsd4_get_lockustateid, 2160 }, 2161 [OP_LOOKUP] = { 2162 .op_func = nfsd4_lookup, 2163 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2164 .op_name = "OP_LOOKUP", 2165 .op_rsize_bop = nfsd4_only_status_rsize, 2166 }, 2167 [OP_LOOKUPP] = { 2168 .op_func = nfsd4_lookupp, 2169 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2170 .op_name = "OP_LOOKUPP", 2171 .op_rsize_bop = nfsd4_only_status_rsize, 2172 }, 2173 [OP_NVERIFY] = { 2174 .op_func = nfsd4_nverify, 2175 .op_name = "OP_NVERIFY", 2176 .op_rsize_bop = nfsd4_only_status_rsize, 2177 }, 2178 [OP_OPEN] = { 2179 .op_func = nfsd4_open, 2180 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2181 .op_name = "OP_OPEN", 2182 .op_rsize_bop = nfsd4_open_rsize, 2183 .op_set_currentstateid = nfsd4_set_openstateid, 2184 }, 2185 [OP_OPEN_CONFIRM] = { 2186 .op_func = nfsd4_open_confirm, 2187 .op_flags = OP_MODIFIES_SOMETHING, 2188 .op_name = "OP_OPEN_CONFIRM", 2189 .op_rsize_bop = nfsd4_status_stateid_rsize, 2190 }, 2191 [OP_OPEN_DOWNGRADE] = { 2192 .op_func = nfsd4_open_downgrade, 2193 .op_flags = OP_MODIFIES_SOMETHING, 2194 .op_name = "OP_OPEN_DOWNGRADE", 2195 .op_rsize_bop = nfsd4_status_stateid_rsize, 2196 .op_get_currentstateid = nfsd4_get_opendowngradestateid, 2197 .op_set_currentstateid = nfsd4_set_opendowngradestateid, 2198 }, 2199 [OP_PUTFH] = { 2200 .op_func = nfsd4_putfh, 2201 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2202 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2203 .op_name = "OP_PUTFH", 2204 .op_rsize_bop = nfsd4_only_status_rsize, 2205 }, 2206 [OP_PUTPUBFH] = { 2207 .op_func = nfsd4_putrootfh, 2208 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2209 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2210 .op_name = "OP_PUTPUBFH", 2211 .op_rsize_bop = nfsd4_only_status_rsize, 2212 }, 2213 [OP_PUTROOTFH] = { 2214 .op_func = nfsd4_putrootfh, 2215 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2216 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2217 .op_name = "OP_PUTROOTFH", 2218 .op_rsize_bop = nfsd4_only_status_rsize, 2219 }, 2220 [OP_READ] = { 2221 .op_func = nfsd4_read, 2222 .op_release = nfsd4_read_release, 2223 .op_name = "OP_READ", 2224 .op_rsize_bop = nfsd4_read_rsize, 2225 .op_get_currentstateid = nfsd4_get_readstateid, 2226 }, 2227 [OP_READDIR] = { 2228 .op_func = nfsd4_readdir, 2229 .op_name = "OP_READDIR", 2230 .op_rsize_bop = nfsd4_readdir_rsize, 2231 }, 2232 [OP_READLINK] = { 2233 .op_func = nfsd4_readlink, 2234 .op_name = "OP_READLINK", 2235 .op_rsize_bop = nfsd4_readlink_rsize, 2236 }, 2237 [OP_REMOVE] = { 2238 .op_func = nfsd4_remove, 2239 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2240 .op_name = "OP_REMOVE", 2241 .op_rsize_bop = nfsd4_remove_rsize, 2242 }, 2243 [OP_RENAME] = { 2244 .op_func = nfsd4_rename, 2245 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2246 .op_name = "OP_RENAME", 2247 .op_rsize_bop = nfsd4_rename_rsize, 2248 }, 2249 [OP_RENEW] = { 2250 .op_func = nfsd4_renew, 2251 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2252 | OP_MODIFIES_SOMETHING, 2253 .op_name = "OP_RENEW", 2254 .op_rsize_bop = nfsd4_only_status_rsize, 2255 2256 }, 2257 [OP_RESTOREFH] = { 2258 .op_func = nfsd4_restorefh, 2259 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2260 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2261 .op_name = "OP_RESTOREFH", 2262 .op_rsize_bop = nfsd4_only_status_rsize, 2263 }, 2264 [OP_SAVEFH] = { 2265 .op_func = nfsd4_savefh, 2266 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2267 .op_name = "OP_SAVEFH", 2268 .op_rsize_bop = nfsd4_only_status_rsize, 2269 }, 2270 [OP_SECINFO] = { 2271 .op_func = nfsd4_secinfo, 2272 .op_release = nfsd4_secinfo_release, 2273 .op_flags = OP_HANDLES_WRONGSEC, 2274 .op_name = "OP_SECINFO", 2275 .op_rsize_bop = nfsd4_secinfo_rsize, 2276 }, 2277 [OP_SETATTR] = { 2278 .op_func = nfsd4_setattr, 2279 .op_name = "OP_SETATTR", 2280 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME 2281 | OP_NONTRIVIAL_ERROR_ENCODE, 2282 .op_rsize_bop = nfsd4_setattr_rsize, 2283 .op_get_currentstateid = nfsd4_get_setattrstateid, 2284 }, 2285 [OP_SETCLIENTID] = { 2286 .op_func = nfsd4_setclientid, 2287 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2288 | OP_MODIFIES_SOMETHING | OP_CACHEME 2289 | OP_NONTRIVIAL_ERROR_ENCODE, 2290 .op_name = "OP_SETCLIENTID", 2291 .op_rsize_bop = nfsd4_setclientid_rsize, 2292 }, 2293 [OP_SETCLIENTID_CONFIRM] = { 2294 .op_func = nfsd4_setclientid_confirm, 2295 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2296 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2297 .op_name = "OP_SETCLIENTID_CONFIRM", 2298 .op_rsize_bop = nfsd4_only_status_rsize, 2299 }, 2300 [OP_VERIFY] = { 2301 .op_func = nfsd4_verify, 2302 .op_name = "OP_VERIFY", 2303 .op_rsize_bop = nfsd4_only_status_rsize, 2304 }, 2305 [OP_WRITE] = { 2306 .op_func = nfsd4_write, 2307 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2308 .op_name = "OP_WRITE", 2309 .op_rsize_bop = nfsd4_write_rsize, 2310 .op_get_currentstateid = nfsd4_get_writestateid, 2311 }, 2312 [OP_RELEASE_LOCKOWNER] = { 2313 .op_func = nfsd4_release_lockowner, 2314 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2315 | OP_MODIFIES_SOMETHING, 2316 .op_name = "OP_RELEASE_LOCKOWNER", 2317 .op_rsize_bop = nfsd4_only_status_rsize, 2318 }, 2319 2320 /* NFSv4.1 operations */ 2321 [OP_EXCHANGE_ID] = { 2322 .op_func = nfsd4_exchange_id, 2323 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2324 | OP_MODIFIES_SOMETHING, 2325 .op_name = "OP_EXCHANGE_ID", 2326 .op_rsize_bop = nfsd4_exchange_id_rsize, 2327 }, 2328 [OP_BACKCHANNEL_CTL] = { 2329 .op_func = nfsd4_backchannel_ctl, 2330 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2331 .op_name = "OP_BACKCHANNEL_CTL", 2332 .op_rsize_bop = nfsd4_only_status_rsize, 2333 }, 2334 [OP_BIND_CONN_TO_SESSION] = { 2335 .op_func = nfsd4_bind_conn_to_session, 2336 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2337 | OP_MODIFIES_SOMETHING, 2338 .op_name = "OP_BIND_CONN_TO_SESSION", 2339 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize, 2340 }, 2341 [OP_CREATE_SESSION] = { 2342 .op_func = nfsd4_create_session, 2343 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2344 | OP_MODIFIES_SOMETHING, 2345 .op_name = "OP_CREATE_SESSION", 2346 .op_rsize_bop = nfsd4_create_session_rsize, 2347 }, 2348 [OP_DESTROY_SESSION] = { 2349 .op_func = nfsd4_destroy_session, 2350 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2351 | OP_MODIFIES_SOMETHING, 2352 .op_name = "OP_DESTROY_SESSION", 2353 .op_rsize_bop = nfsd4_only_status_rsize, 2354 }, 2355 [OP_SEQUENCE] = { 2356 .op_func = nfsd4_sequence, 2357 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 2358 .op_name = "OP_SEQUENCE", 2359 .op_rsize_bop = nfsd4_sequence_rsize, 2360 }, 2361 [OP_DESTROY_CLIENTID] = { 2362 .op_func = nfsd4_destroy_clientid, 2363 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2364 | OP_MODIFIES_SOMETHING, 2365 .op_name = "OP_DESTROY_CLIENTID", 2366 .op_rsize_bop = nfsd4_only_status_rsize, 2367 }, 2368 [OP_RECLAIM_COMPLETE] = { 2369 .op_func = nfsd4_reclaim_complete, 2370 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2371 .op_name = "OP_RECLAIM_COMPLETE", 2372 .op_rsize_bop = nfsd4_only_status_rsize, 2373 }, 2374 [OP_SECINFO_NO_NAME] = { 2375 .op_func = nfsd4_secinfo_no_name, 2376 .op_release = nfsd4_secinfo_no_name_release, 2377 .op_flags = OP_HANDLES_WRONGSEC, 2378 .op_name = "OP_SECINFO_NO_NAME", 2379 .op_rsize_bop = nfsd4_secinfo_rsize, 2380 }, 2381 [OP_TEST_STATEID] = { 2382 .op_func = nfsd4_test_stateid, 2383 .op_flags = ALLOWED_WITHOUT_FH, 2384 .op_name = "OP_TEST_STATEID", 2385 .op_rsize_bop = nfsd4_test_stateid_rsize, 2386 }, 2387 [OP_FREE_STATEID] = { 2388 .op_func = nfsd4_free_stateid, 2389 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2390 .op_name = "OP_FREE_STATEID", 2391 .op_get_currentstateid = nfsd4_get_freestateid, 2392 .op_rsize_bop = nfsd4_only_status_rsize, 2393 }, 2394 #ifdef CONFIG_NFSD_PNFS 2395 [OP_GETDEVICEINFO] = { 2396 .op_func = nfsd4_getdeviceinfo, 2397 .op_release = nfsd4_getdeviceinfo_release, 2398 .op_flags = ALLOWED_WITHOUT_FH, 2399 .op_name = "OP_GETDEVICEINFO", 2400 .op_rsize_bop = nfsd4_getdeviceinfo_rsize, 2401 }, 2402 [OP_LAYOUTGET] = { 2403 .op_func = nfsd4_layoutget, 2404 .op_release = nfsd4_layoutget_release, 2405 .op_flags = OP_MODIFIES_SOMETHING, 2406 .op_name = "OP_LAYOUTGET", 2407 .op_rsize_bop = nfsd4_layoutget_rsize, 2408 }, 2409 [OP_LAYOUTCOMMIT] = { 2410 .op_func = nfsd4_layoutcommit, 2411 .op_flags = OP_MODIFIES_SOMETHING, 2412 .op_name = "OP_LAYOUTCOMMIT", 2413 .op_rsize_bop = nfsd4_layoutcommit_rsize, 2414 }, 2415 [OP_LAYOUTRETURN] = { 2416 .op_func = nfsd4_layoutreturn, 2417 .op_flags = OP_MODIFIES_SOMETHING, 2418 .op_name = "OP_LAYOUTRETURN", 2419 .op_rsize_bop = nfsd4_layoutreturn_rsize, 2420 }, 2421 #endif /* CONFIG_NFSD_PNFS */ 2422 2423 /* NFSv4.2 operations */ 2424 [OP_ALLOCATE] = { 2425 .op_func = nfsd4_allocate, 2426 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2427 .op_name = "OP_ALLOCATE", 2428 .op_rsize_bop = nfsd4_only_status_rsize, 2429 }, 2430 [OP_DEALLOCATE] = { 2431 .op_func = nfsd4_deallocate, 2432 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2433 .op_name = "OP_DEALLOCATE", 2434 .op_rsize_bop = nfsd4_only_status_rsize, 2435 }, 2436 [OP_CLONE] = { 2437 .op_func = nfsd4_clone, 2438 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2439 .op_name = "OP_CLONE", 2440 .op_rsize_bop = nfsd4_only_status_rsize, 2441 }, 2442 [OP_COPY] = { 2443 .op_func = nfsd4_copy, 2444 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2445 .op_name = "OP_COPY", 2446 .op_rsize_bop = nfsd4_copy_rsize, 2447 }, 2448 [OP_SEEK] = { 2449 .op_func = nfsd4_seek, 2450 .op_name = "OP_SEEK", 2451 .op_rsize_bop = nfsd4_seek_rsize, 2452 }, 2453 }; 2454 2455 /** 2456 * nfsd4_spo_must_allow - Determine if the compound op contains an 2457 * operation that is allowed to be sent with machine credentials 2458 * 2459 * @rqstp: a pointer to the struct svc_rqst 2460 * 2461 * Checks to see if the compound contains a spo_must_allow op 2462 * and confirms that it was sent with the proper machine creds. 2463 */ 2464 2465 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 2466 { 2467 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2468 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2469 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2470 struct nfsd4_compound_state *cstate = &resp->cstate; 2471 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 2472 u32 opiter; 2473 2474 if (!cstate->minorversion) 2475 return false; 2476 2477 if (cstate->spo_must_allowed == true) 2478 return true; 2479 2480 opiter = resp->opcnt; 2481 while (opiter < argp->opcnt) { 2482 this = &argp->ops[opiter++]; 2483 if (test_bit(this->opnum, allow->u.longs) && 2484 cstate->clp->cl_mach_cred && 2485 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 2486 cstate->spo_must_allowed = true; 2487 return true; 2488 } 2489 } 2490 cstate->spo_must_allowed = false; 2491 return false; 2492 } 2493 2494 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 2495 { 2496 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp) 2497 return op_encode_hdr_size * sizeof(__be32); 2498 2499 BUG_ON(OPDESC(op)->op_rsize_bop == NULL); 2500 return OPDESC(op)->op_rsize_bop(rqstp, op); 2501 } 2502 2503 void warn_on_nonidempotent_op(struct nfsd4_op *op) 2504 { 2505 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 2506 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 2507 op->opnum, nfsd4_op_name(op->opnum)); 2508 WARN_ON_ONCE(1); 2509 } 2510 } 2511 2512 static const char *nfsd4_op_name(unsigned opnum) 2513 { 2514 if (opnum < ARRAY_SIZE(nfsd4_ops)) 2515 return nfsd4_ops[opnum].op_name; 2516 return "unknown_operation"; 2517 } 2518 2519 #define nfsd4_voidres nfsd4_voidargs 2520 struct nfsd4_voidargs { int dummy; }; 2521 2522 static const struct svc_procedure nfsd_procedures4[2] = { 2523 [NFSPROC4_NULL] = { 2524 .pc_func = nfsd4_proc_null, 2525 .pc_encode = nfs4svc_encode_voidres, 2526 .pc_argsize = sizeof(struct nfsd4_voidargs), 2527 .pc_ressize = sizeof(struct nfsd4_voidres), 2528 .pc_cachetype = RC_NOCACHE, 2529 .pc_xdrressize = 1, 2530 }, 2531 [NFSPROC4_COMPOUND] = { 2532 .pc_func = nfsd4_proc_compound, 2533 .pc_decode = nfs4svc_decode_compoundargs, 2534 .pc_encode = nfs4svc_encode_compoundres, 2535 .pc_argsize = sizeof(struct nfsd4_compoundargs), 2536 .pc_ressize = sizeof(struct nfsd4_compoundres), 2537 .pc_release = nfsd4_release_compoundargs, 2538 .pc_cachetype = RC_NOCACHE, 2539 .pc_xdrressize = NFSD_BUFSIZE/4, 2540 }, 2541 }; 2542 2543 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)]; 2544 const struct svc_version nfsd_version4 = { 2545 .vs_vers = 4, 2546 .vs_nproc = 2, 2547 .vs_proc = nfsd_procedures4, 2548 .vs_count = nfsd_count3, 2549 .vs_dispatch = nfsd_dispatch, 2550 .vs_xdrsize = NFS4_SVC_XDRSIZE, 2551 .vs_rpcb_optnl = true, 2552 .vs_need_cong_ctrl = true, 2553 }; 2554 2555 /* 2556 * Local variables: 2557 * c-basic-offset: 8 2558 * End: 2559 */ 2560