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 if (!cstate->current_fh.fh_dentry) 489 return nfserr_nofilehandle; 490 491 u->getfh = &cstate->current_fh; 492 return nfs_ok; 493 } 494 495 static __be32 496 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 497 union nfsd4_op_u *u) 498 { 499 struct nfsd4_putfh *putfh = &u->putfh; 500 501 fh_put(&cstate->current_fh); 502 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 503 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 504 putfh->pf_fhlen); 505 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 506 } 507 508 static __be32 509 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 510 union nfsd4_op_u *u) 511 { 512 __be32 status; 513 514 fh_put(&cstate->current_fh); 515 status = exp_pseudoroot(rqstp, &cstate->current_fh); 516 return status; 517 } 518 519 static __be32 520 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 521 union nfsd4_op_u *u) 522 { 523 if (!cstate->save_fh.fh_dentry) 524 return nfserr_restorefh; 525 526 fh_dup2(&cstate->current_fh, &cstate->save_fh); 527 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 528 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 529 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 530 } 531 return nfs_ok; 532 } 533 534 static __be32 535 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 536 union nfsd4_op_u *u) 537 { 538 if (!cstate->current_fh.fh_dentry) 539 return nfserr_nofilehandle; 540 541 fh_dup2(&cstate->save_fh, &cstate->current_fh); 542 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 543 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 544 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 545 } 546 return nfs_ok; 547 } 548 549 /* 550 * misc nfsv4 ops 551 */ 552 static __be32 553 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 554 union nfsd4_op_u *u) 555 { 556 struct nfsd4_access *access = &u->access; 557 558 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 559 return nfserr_inval; 560 561 access->ac_resp_access = access->ac_req_access; 562 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 563 &access->ac_supported); 564 } 565 566 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 567 { 568 __be32 verf[2]; 569 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 570 571 /* 572 * This is opaque to client, so no need to byte-swap. Use 573 * __force to keep sparse happy 574 */ 575 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec; 576 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec; 577 memcpy(verifier->data, verf, sizeof(verifier->data)); 578 } 579 580 static __be32 581 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 582 union nfsd4_op_u *u) 583 { 584 struct nfsd4_commit *commit = &u->commit; 585 586 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 587 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 588 commit->co_count); 589 } 590 591 static __be32 592 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 593 union nfsd4_op_u *u) 594 { 595 struct nfsd4_create *create = &u->create; 596 struct svc_fh resfh; 597 __be32 status; 598 dev_t rdev; 599 600 fh_init(&resfh, NFS4_FHSIZE); 601 602 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP); 603 if (status) 604 return status; 605 606 status = check_attr_support(rqstp, cstate, create->cr_bmval, 607 nfsd_attrmask); 608 if (status) 609 return status; 610 611 switch (create->cr_type) { 612 case NF4LNK: 613 status = nfsd_symlink(rqstp, &cstate->current_fh, 614 create->cr_name, create->cr_namelen, 615 create->cr_data, &resfh); 616 break; 617 618 case NF4BLK: 619 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 620 if (MAJOR(rdev) != create->cr_specdata1 || 621 MINOR(rdev) != create->cr_specdata2) 622 return nfserr_inval; 623 status = nfsd_create(rqstp, &cstate->current_fh, 624 create->cr_name, create->cr_namelen, 625 &create->cr_iattr, S_IFBLK, rdev, &resfh); 626 break; 627 628 case NF4CHR: 629 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 630 if (MAJOR(rdev) != create->cr_specdata1 || 631 MINOR(rdev) != create->cr_specdata2) 632 return nfserr_inval; 633 status = nfsd_create(rqstp, &cstate->current_fh, 634 create->cr_name, create->cr_namelen, 635 &create->cr_iattr,S_IFCHR, rdev, &resfh); 636 break; 637 638 case NF4SOCK: 639 status = nfsd_create(rqstp, &cstate->current_fh, 640 create->cr_name, create->cr_namelen, 641 &create->cr_iattr, S_IFSOCK, 0, &resfh); 642 break; 643 644 case NF4FIFO: 645 status = nfsd_create(rqstp, &cstate->current_fh, 646 create->cr_name, create->cr_namelen, 647 &create->cr_iattr, S_IFIFO, 0, &resfh); 648 break; 649 650 case NF4DIR: 651 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 652 status = nfsd_create(rqstp, &cstate->current_fh, 653 create->cr_name, create->cr_namelen, 654 &create->cr_iattr, S_IFDIR, 0, &resfh); 655 break; 656 657 default: 658 status = nfserr_badtype; 659 } 660 661 if (status) 662 goto out; 663 664 if (create->cr_label.len) 665 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 666 667 if (create->cr_acl != NULL) 668 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 669 create->cr_bmval); 670 671 fh_unlock(&cstate->current_fh); 672 set_change_info(&create->cr_cinfo, &cstate->current_fh); 673 fh_dup2(&cstate->current_fh, &resfh); 674 out: 675 fh_put(&resfh); 676 return status; 677 } 678 679 static __be32 680 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 681 union nfsd4_op_u *u) 682 { 683 struct nfsd4_getattr *getattr = &u->getattr; 684 __be32 status; 685 686 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 687 if (status) 688 return status; 689 690 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 691 return nfserr_inval; 692 693 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 694 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 695 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 696 697 getattr->ga_fhp = &cstate->current_fh; 698 return nfs_ok; 699 } 700 701 static __be32 702 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 703 union nfsd4_op_u *u) 704 { 705 struct nfsd4_link *link = &u->link; 706 __be32 status = nfserr_nofilehandle; 707 708 if (!cstate->save_fh.fh_dentry) 709 return status; 710 status = nfsd_link(rqstp, &cstate->current_fh, 711 link->li_name, link->li_namelen, &cstate->save_fh); 712 if (!status) 713 set_change_info(&link->li_cinfo, &cstate->current_fh); 714 return status; 715 } 716 717 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 718 { 719 struct svc_fh tmp_fh; 720 __be32 ret; 721 722 fh_init(&tmp_fh, NFS4_FHSIZE); 723 ret = exp_pseudoroot(rqstp, &tmp_fh); 724 if (ret) 725 return ret; 726 if (tmp_fh.fh_dentry == fh->fh_dentry) { 727 fh_put(&tmp_fh); 728 return nfserr_noent; 729 } 730 fh_put(&tmp_fh); 731 return nfsd_lookup(rqstp, fh, "..", 2, fh); 732 } 733 734 static __be32 735 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 736 union nfsd4_op_u *u) 737 { 738 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 739 } 740 741 static __be32 742 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 743 union nfsd4_op_u *u) 744 { 745 return nfsd_lookup(rqstp, &cstate->current_fh, 746 u->lookup.lo_name, u->lookup.lo_len, 747 &cstate->current_fh); 748 } 749 750 static __be32 751 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 752 union nfsd4_op_u *u) 753 { 754 struct nfsd4_read *read = &u->read; 755 __be32 status; 756 757 read->rd_filp = NULL; 758 if (read->rd_offset >= OFFSET_MAX) 759 return nfserr_inval; 760 761 /* 762 * If we do a zero copy read, then a client will see read data 763 * that reflects the state of the file *after* performing the 764 * following compound. 765 * 766 * To ensure proper ordering, we therefore turn off zero copy if 767 * the client wants us to do more in this compound: 768 */ 769 if (!nfsd4_last_compound_op(rqstp)) 770 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 771 772 /* check stateid */ 773 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 774 &read->rd_stateid, RD_STATE, 775 &read->rd_filp, &read->rd_tmp_file); 776 if (status) { 777 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 778 goto out; 779 } 780 status = nfs_ok; 781 out: 782 read->rd_rqstp = rqstp; 783 read->rd_fhp = &cstate->current_fh; 784 return status; 785 } 786 787 788 static void 789 nfsd4_read_release(union nfsd4_op_u *u) 790 { 791 if (u->read.rd_filp) 792 fput(u->read.rd_filp); 793 } 794 795 static __be32 796 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 797 union nfsd4_op_u *u) 798 { 799 struct nfsd4_readdir *readdir = &u->readdir; 800 u64 cookie = readdir->rd_cookie; 801 static const nfs4_verifier zeroverf; 802 803 /* no need to check permission - this will be done in nfsd_readdir() */ 804 805 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 806 return nfserr_inval; 807 808 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 809 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 810 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 811 812 if ((cookie == 1) || (cookie == 2) || 813 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 814 return nfserr_bad_cookie; 815 816 readdir->rd_rqstp = rqstp; 817 readdir->rd_fhp = &cstate->current_fh; 818 return nfs_ok; 819 } 820 821 static __be32 822 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 823 union nfsd4_op_u *u) 824 { 825 u->readlink.rl_rqstp = rqstp; 826 u->readlink.rl_fhp = &cstate->current_fh; 827 return nfs_ok; 828 } 829 830 static __be32 831 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 832 union nfsd4_op_u *u) 833 { 834 struct nfsd4_remove *remove = &u->remove; 835 __be32 status; 836 837 if (opens_in_grace(SVC_NET(rqstp))) 838 return nfserr_grace; 839 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 840 remove->rm_name, remove->rm_namelen); 841 if (!status) { 842 fh_unlock(&cstate->current_fh); 843 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 844 } 845 return status; 846 } 847 848 static __be32 849 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 850 union nfsd4_op_u *u) 851 { 852 struct nfsd4_rename *rename = &u->rename; 853 __be32 status = nfserr_nofilehandle; 854 855 if (!cstate->save_fh.fh_dentry) 856 return status; 857 if (opens_in_grace(SVC_NET(rqstp)) && 858 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 859 return nfserr_grace; 860 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 861 rename->rn_snamelen, &cstate->current_fh, 862 rename->rn_tname, rename->rn_tnamelen); 863 if (status) 864 return status; 865 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 866 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 867 return nfs_ok; 868 } 869 870 static __be32 871 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 872 union nfsd4_op_u *u) 873 { 874 struct nfsd4_secinfo *secinfo = &u->secinfo; 875 struct svc_export *exp; 876 struct dentry *dentry; 877 __be32 err; 878 879 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 880 if (err) 881 return err; 882 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 883 secinfo->si_name, secinfo->si_namelen, 884 &exp, &dentry); 885 if (err) 886 return err; 887 fh_unlock(&cstate->current_fh); 888 if (d_really_is_negative(dentry)) { 889 exp_put(exp); 890 err = nfserr_noent; 891 } else 892 secinfo->si_exp = exp; 893 dput(dentry); 894 if (cstate->minorversion) 895 /* See rfc 5661 section 2.6.3.1.1.8 */ 896 fh_put(&cstate->current_fh); 897 return err; 898 } 899 900 static __be32 901 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 902 union nfsd4_op_u *u) 903 { 904 __be32 err; 905 906 switch (u->secinfo_no_name.sin_style) { 907 case NFS4_SECINFO_STYLE4_CURRENT_FH: 908 break; 909 case NFS4_SECINFO_STYLE4_PARENT: 910 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 911 if (err) 912 return err; 913 break; 914 default: 915 return nfserr_inval; 916 } 917 918 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export); 919 fh_put(&cstate->current_fh); 920 return nfs_ok; 921 } 922 923 static void 924 nfsd4_secinfo_release(union nfsd4_op_u *u) 925 { 926 if (u->secinfo.si_exp) 927 exp_put(u->secinfo.si_exp); 928 } 929 930 static void 931 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u) 932 { 933 if (u->secinfo_no_name.sin_exp) 934 exp_put(u->secinfo_no_name.sin_exp); 935 } 936 937 static __be32 938 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 939 union nfsd4_op_u *u) 940 { 941 struct nfsd4_setattr *setattr = &u->setattr; 942 __be32 status = nfs_ok; 943 int err; 944 945 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 946 status = nfs4_preprocess_stateid_op(rqstp, cstate, 947 &cstate->current_fh, &setattr->sa_stateid, 948 WR_STATE, NULL, NULL); 949 if (status) { 950 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 951 return status; 952 } 953 } 954 err = fh_want_write(&cstate->current_fh); 955 if (err) 956 return nfserrno(err); 957 status = nfs_ok; 958 959 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 960 nfsd_attrmask); 961 if (status) 962 goto out; 963 964 if (setattr->sa_acl != NULL) 965 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 966 setattr->sa_acl); 967 if (status) 968 goto out; 969 if (setattr->sa_label.len) 970 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 971 &setattr->sa_label); 972 if (status) 973 goto out; 974 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 975 0, (time_t)0); 976 out: 977 fh_drop_write(&cstate->current_fh); 978 return status; 979 } 980 981 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 982 { 983 int i = 1; 984 int buflen = write->wr_buflen; 985 986 vec[0].iov_base = write->wr_head.iov_base; 987 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 988 buflen -= vec[0].iov_len; 989 990 while (buflen) { 991 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 992 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 993 buflen -= vec[i].iov_len; 994 i++; 995 } 996 return i; 997 } 998 999 static __be32 1000 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1001 union nfsd4_op_u *u) 1002 { 1003 struct nfsd4_write *write = &u->write; 1004 stateid_t *stateid = &write->wr_stateid; 1005 struct file *filp = NULL; 1006 __be32 status = nfs_ok; 1007 unsigned long cnt; 1008 int nvecs; 1009 1010 if (write->wr_offset >= OFFSET_MAX) 1011 return nfserr_inval; 1012 1013 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1014 stateid, WR_STATE, &filp, NULL); 1015 if (status) { 1016 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 1017 return status; 1018 } 1019 1020 cnt = write->wr_buflen; 1021 write->wr_how_written = write->wr_stable_how; 1022 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 1023 1024 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1025 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1026 1027 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp, 1028 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 1029 write->wr_how_written); 1030 fput(filp); 1031 1032 write->wr_bytes_written = cnt; 1033 1034 return status; 1035 } 1036 1037 static __be32 1038 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1039 stateid_t *src_stateid, struct file **src, 1040 stateid_t *dst_stateid, struct file **dst) 1041 { 1042 __be32 status; 1043 1044 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, 1045 src_stateid, RD_STATE, src, NULL); 1046 if (status) { 1047 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); 1048 goto out; 1049 } 1050 1051 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1052 dst_stateid, WR_STATE, dst, NULL); 1053 if (status) { 1054 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); 1055 goto out_put_src; 1056 } 1057 1058 /* fix up for NFS-specific error code */ 1059 if (!S_ISREG(file_inode(*src)->i_mode) || 1060 !S_ISREG(file_inode(*dst)->i_mode)) { 1061 status = nfserr_wrong_type; 1062 goto out_put_dst; 1063 } 1064 1065 out: 1066 return status; 1067 out_put_dst: 1068 fput(*dst); 1069 out_put_src: 1070 fput(*src); 1071 goto out; 1072 } 1073 1074 static __be32 1075 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1076 union nfsd4_op_u *u) 1077 { 1078 struct nfsd4_clone *clone = &u->clone; 1079 struct file *src, *dst; 1080 __be32 status; 1081 1082 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src, 1083 &clone->cl_dst_stateid, &dst); 1084 if (status) 1085 goto out; 1086 1087 status = nfsd4_clone_file_range(src, clone->cl_src_pos, 1088 dst, clone->cl_dst_pos, clone->cl_count); 1089 1090 fput(dst); 1091 fput(src); 1092 out: 1093 return status; 1094 } 1095 1096 static __be32 1097 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1098 union nfsd4_op_u *u) 1099 { 1100 struct nfsd4_copy *copy = &u->copy; 1101 struct file *src, *dst; 1102 __be32 status; 1103 ssize_t bytes; 1104 1105 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, &src, 1106 ©->cp_dst_stateid, &dst); 1107 if (status) 1108 goto out; 1109 1110 bytes = nfsd_copy_file_range(src, copy->cp_src_pos, 1111 dst, copy->cp_dst_pos, copy->cp_count); 1112 1113 if (bytes < 0) 1114 status = nfserrno(bytes); 1115 else { 1116 copy->cp_res.wr_bytes_written = bytes; 1117 copy->cp_res.wr_stable_how = NFS_UNSTABLE; 1118 copy->cp_consecutive = 1; 1119 copy->cp_synchronous = 1; 1120 gen_boot_verifier(©->cp_res.wr_verifier, SVC_NET(rqstp)); 1121 status = nfs_ok; 1122 } 1123 1124 fput(src); 1125 fput(dst); 1126 out: 1127 return status; 1128 } 1129 1130 static __be32 1131 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1132 struct nfsd4_fallocate *fallocate, int flags) 1133 { 1134 __be32 status = nfserr_notsupp; 1135 struct file *file; 1136 1137 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1138 &fallocate->falloc_stateid, 1139 WR_STATE, &file, NULL); 1140 if (status != nfs_ok) { 1141 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1142 return status; 1143 } 1144 1145 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file, 1146 fallocate->falloc_offset, 1147 fallocate->falloc_length, 1148 flags); 1149 fput(file); 1150 return status; 1151 } 1152 1153 static __be32 1154 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1155 union nfsd4_op_u *u) 1156 { 1157 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0); 1158 } 1159 1160 static __be32 1161 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1162 union nfsd4_op_u *u) 1163 { 1164 return nfsd4_fallocate(rqstp, cstate, &u->deallocate, 1165 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1166 } 1167 1168 static __be32 1169 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1170 union nfsd4_op_u *u) 1171 { 1172 struct nfsd4_seek *seek = &u->seek; 1173 int whence; 1174 __be32 status; 1175 struct file *file; 1176 1177 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1178 &seek->seek_stateid, 1179 RD_STATE, &file, NULL); 1180 if (status) { 1181 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1182 return status; 1183 } 1184 1185 switch (seek->seek_whence) { 1186 case NFS4_CONTENT_DATA: 1187 whence = SEEK_DATA; 1188 break; 1189 case NFS4_CONTENT_HOLE: 1190 whence = SEEK_HOLE; 1191 break; 1192 default: 1193 status = nfserr_union_notsupp; 1194 goto out; 1195 } 1196 1197 /* 1198 * Note: This call does change file->f_pos, but nothing in NFSD 1199 * should ever file->f_pos. 1200 */ 1201 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); 1202 if (seek->seek_pos < 0) 1203 status = nfserrno(seek->seek_pos); 1204 else if (seek->seek_pos >= i_size_read(file_inode(file))) 1205 seek->seek_eof = true; 1206 1207 out: 1208 fput(file); 1209 return status; 1210 } 1211 1212 /* This routine never returns NFS_OK! If there are no other errors, it 1213 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1214 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1215 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1216 */ 1217 static __be32 1218 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1219 struct nfsd4_verify *verify) 1220 { 1221 __be32 *buf, *p; 1222 int count; 1223 __be32 status; 1224 1225 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1226 if (status) 1227 return status; 1228 1229 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1230 if (status) 1231 return status; 1232 1233 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1234 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1235 return nfserr_inval; 1236 if (verify->ve_attrlen & 3) 1237 return nfserr_inval; 1238 1239 /* count in words: 1240 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1241 */ 1242 count = 4 + (verify->ve_attrlen >> 2); 1243 buf = kmalloc(count << 2, GFP_KERNEL); 1244 if (!buf) 1245 return nfserr_jukebox; 1246 1247 p = buf; 1248 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1249 cstate->current_fh.fh_export, 1250 cstate->current_fh.fh_dentry, 1251 verify->ve_bmval, 1252 rqstp, 0); 1253 /* 1254 * If nfsd4_encode_fattr() ran out of space, assume that's because 1255 * the attributes are longer (hence different) than those given: 1256 */ 1257 if (status == nfserr_resource) 1258 status = nfserr_not_same; 1259 if (status) 1260 goto out_kfree; 1261 1262 /* skip bitmap */ 1263 p = buf + 1 + ntohl(buf[0]); 1264 status = nfserr_not_same; 1265 if (ntohl(*p++) != verify->ve_attrlen) 1266 goto out_kfree; 1267 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1268 status = nfserr_same; 1269 1270 out_kfree: 1271 kfree(buf); 1272 return status; 1273 } 1274 1275 static __be32 1276 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1277 union nfsd4_op_u *u) 1278 { 1279 __be32 status; 1280 1281 status = _nfsd4_verify(rqstp, cstate, &u->verify); 1282 return status == nfserr_not_same ? nfs_ok : status; 1283 } 1284 1285 static __be32 1286 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1287 union nfsd4_op_u *u) 1288 { 1289 __be32 status; 1290 1291 status = _nfsd4_verify(rqstp, cstate, &u->nverify); 1292 return status == nfserr_same ? nfs_ok : status; 1293 } 1294 1295 #ifdef CONFIG_NFSD_PNFS 1296 static const struct nfsd4_layout_ops * 1297 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1298 { 1299 if (!exp->ex_layout_types) { 1300 dprintk("%s: export does not support pNFS\n", __func__); 1301 return NULL; 1302 } 1303 1304 if (layout_type >= LAYOUT_TYPE_MAX || 1305 !(exp->ex_layout_types & (1 << layout_type))) { 1306 dprintk("%s: layout type %d not supported\n", 1307 __func__, layout_type); 1308 return NULL; 1309 } 1310 1311 return nfsd4_layout_ops[layout_type]; 1312 } 1313 1314 static __be32 1315 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1316 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1317 { 1318 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo; 1319 const struct nfsd4_layout_ops *ops; 1320 struct nfsd4_deviceid_map *map; 1321 struct svc_export *exp; 1322 __be32 nfserr; 1323 1324 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1325 __func__, 1326 gdp->gd_layout_type, 1327 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1328 gdp->gd_maxcount); 1329 1330 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1331 if (!map) { 1332 dprintk("%s: couldn't find device ID to export mapping!\n", 1333 __func__); 1334 return nfserr_noent; 1335 } 1336 1337 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1338 if (IS_ERR(exp)) { 1339 dprintk("%s: could not find device id\n", __func__); 1340 return nfserr_noent; 1341 } 1342 1343 nfserr = nfserr_layoutunavailable; 1344 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1345 if (!ops) 1346 goto out; 1347 1348 nfserr = nfs_ok; 1349 if (gdp->gd_maxcount != 0) { 1350 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1351 rqstp, cstate->session->se_client, gdp); 1352 } 1353 1354 gdp->gd_notify_types &= ops->notify_types; 1355 out: 1356 exp_put(exp); 1357 return nfserr; 1358 } 1359 1360 static void 1361 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u) 1362 { 1363 kfree(u->getdeviceinfo.gd_device); 1364 } 1365 1366 static __be32 1367 nfsd4_layoutget(struct svc_rqst *rqstp, 1368 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1369 { 1370 struct nfsd4_layoutget *lgp = &u->layoutget; 1371 struct svc_fh *current_fh = &cstate->current_fh; 1372 const struct nfsd4_layout_ops *ops; 1373 struct nfs4_layout_stateid *ls; 1374 __be32 nfserr; 1375 int accmode; 1376 1377 switch (lgp->lg_seg.iomode) { 1378 case IOMODE_READ: 1379 accmode = NFSD_MAY_READ; 1380 break; 1381 case IOMODE_RW: 1382 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE; 1383 break; 1384 default: 1385 dprintk("%s: invalid iomode %d\n", 1386 __func__, lgp->lg_seg.iomode); 1387 nfserr = nfserr_badiomode; 1388 goto out; 1389 } 1390 1391 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1392 if (nfserr) 1393 goto out; 1394 1395 nfserr = nfserr_layoutunavailable; 1396 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1397 if (!ops) 1398 goto out; 1399 1400 /* 1401 * Verify minlength and range as per RFC5661: 1402 * o If loga_length is less than loga_minlength, 1403 * the metadata server MUST return NFS4ERR_INVAL. 1404 * o If the sum of loga_offset and loga_minlength exceeds 1405 * NFS4_UINT64_MAX, and loga_minlength is not 1406 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1407 * o If the sum of loga_offset and loga_length exceeds 1408 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1409 * the error NFS4ERR_INVAL MUST result. 1410 */ 1411 nfserr = nfserr_inval; 1412 if (lgp->lg_seg.length < lgp->lg_minlength || 1413 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1414 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1415 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1416 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1417 goto out; 1418 if (lgp->lg_seg.length == 0) 1419 goto out; 1420 1421 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1422 true, lgp->lg_layout_type, &ls); 1423 if (nfserr) { 1424 trace_layout_get_lookup_fail(&lgp->lg_sid); 1425 goto out; 1426 } 1427 1428 nfserr = nfserr_recallconflict; 1429 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1430 goto out_put_stid; 1431 1432 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1433 current_fh, lgp); 1434 if (nfserr) 1435 goto out_put_stid; 1436 1437 nfserr = nfsd4_insert_layout(lgp, ls); 1438 1439 out_put_stid: 1440 mutex_unlock(&ls->ls_mutex); 1441 nfs4_put_stid(&ls->ls_stid); 1442 out: 1443 return nfserr; 1444 } 1445 1446 static void 1447 nfsd4_layoutget_release(union nfsd4_op_u *u) 1448 { 1449 kfree(u->layoutget.lg_content); 1450 } 1451 1452 static __be32 1453 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1454 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1455 { 1456 struct nfsd4_layoutcommit *lcp = &u->layoutcommit; 1457 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1458 struct svc_fh *current_fh = &cstate->current_fh; 1459 const struct nfsd4_layout_ops *ops; 1460 loff_t new_size = lcp->lc_last_wr + 1; 1461 struct inode *inode; 1462 struct nfs4_layout_stateid *ls; 1463 __be32 nfserr; 1464 1465 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 1466 if (nfserr) 1467 goto out; 1468 1469 nfserr = nfserr_layoutunavailable; 1470 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 1471 if (!ops) 1472 goto out; 1473 inode = d_inode(current_fh->fh_dentry); 1474 1475 nfserr = nfserr_inval; 1476 if (new_size <= seg->offset) { 1477 dprintk("pnfsd: last write before layout segment\n"); 1478 goto out; 1479 } 1480 if (new_size > seg->offset + seg->length) { 1481 dprintk("pnfsd: last write beyond layout segment\n"); 1482 goto out; 1483 } 1484 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 1485 dprintk("pnfsd: layoutcommit beyond EOF\n"); 1486 goto out; 1487 } 1488 1489 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 1490 false, lcp->lc_layout_type, 1491 &ls); 1492 if (nfserr) { 1493 trace_layout_commit_lookup_fail(&lcp->lc_sid); 1494 /* fixup error code as per RFC5661 */ 1495 if (nfserr == nfserr_bad_stateid) 1496 nfserr = nfserr_badlayout; 1497 goto out; 1498 } 1499 1500 /* LAYOUTCOMMIT does not require any serialization */ 1501 mutex_unlock(&ls->ls_mutex); 1502 1503 if (new_size > i_size_read(inode)) { 1504 lcp->lc_size_chg = 1; 1505 lcp->lc_newsize = new_size; 1506 } else { 1507 lcp->lc_size_chg = 0; 1508 } 1509 1510 nfserr = ops->proc_layoutcommit(inode, lcp); 1511 nfs4_put_stid(&ls->ls_stid); 1512 out: 1513 return nfserr; 1514 } 1515 1516 static __be32 1517 nfsd4_layoutreturn(struct svc_rqst *rqstp, 1518 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1519 { 1520 struct nfsd4_layoutreturn *lrp = &u->layoutreturn; 1521 struct svc_fh *current_fh = &cstate->current_fh; 1522 __be32 nfserr; 1523 1524 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 1525 if (nfserr) 1526 goto out; 1527 1528 nfserr = nfserr_layoutunavailable; 1529 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 1530 goto out; 1531 1532 switch (lrp->lr_seg.iomode) { 1533 case IOMODE_READ: 1534 case IOMODE_RW: 1535 case IOMODE_ANY: 1536 break; 1537 default: 1538 dprintk("%s: invalid iomode %d\n", __func__, 1539 lrp->lr_seg.iomode); 1540 nfserr = nfserr_inval; 1541 goto out; 1542 } 1543 1544 switch (lrp->lr_return_type) { 1545 case RETURN_FILE: 1546 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 1547 break; 1548 case RETURN_FSID: 1549 case RETURN_ALL: 1550 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 1551 break; 1552 default: 1553 dprintk("%s: invalid return_type %d\n", __func__, 1554 lrp->lr_return_type); 1555 nfserr = nfserr_inval; 1556 break; 1557 } 1558 out: 1559 return nfserr; 1560 } 1561 #endif /* CONFIG_NFSD_PNFS */ 1562 1563 /* 1564 * NULL call. 1565 */ 1566 static __be32 1567 nfsd4_proc_null(struct svc_rqst *rqstp) 1568 { 1569 return nfs_ok; 1570 } 1571 1572 static inline void nfsd4_increment_op_stats(u32 opnum) 1573 { 1574 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1575 nfsdstats.nfs4_opcount[opnum]++; 1576 } 1577 1578 static const struct nfsd4_operation nfsd4_ops[]; 1579 1580 static const char *nfsd4_op_name(unsigned opnum); 1581 1582 /* 1583 * Enforce NFSv4.1 COMPOUND ordering rules: 1584 * 1585 * Also note, enforced elsewhere: 1586 * - SEQUENCE other than as first op results in 1587 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1588 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1589 * (Enforced in nfsd4_bind_conn_to_session().) 1590 * - DESTROY_SESSION must be the final operation in a compound, if 1591 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1592 * (Enforced in nfsd4_destroy_session().) 1593 */ 1594 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1595 { 1596 struct nfsd4_op *op = &args->ops[0]; 1597 1598 /* These ordering requirements don't apply to NFSv4.0: */ 1599 if (args->minorversion == 0) 1600 return nfs_ok; 1601 /* This is weird, but OK, not our problem: */ 1602 if (args->opcnt == 0) 1603 return nfs_ok; 1604 if (op->status == nfserr_op_illegal) 1605 return nfs_ok; 1606 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1607 return nfserr_op_not_in_session; 1608 if (op->opnum == OP_SEQUENCE) 1609 return nfs_ok; 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 1716 status = nfs41_check_op_ordering(args); 1717 if (status) { 1718 op = &args->ops[0]; 1719 op->status = status; 1720 goto encode_op; 1721 } 1722 1723 while (!status && resp->opcnt < args->opcnt) { 1724 op = &args->ops[resp->opcnt++]; 1725 1726 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1727 resp->opcnt, args->opcnt, op->opnum, 1728 nfsd4_op_name(op->opnum)); 1729 /* 1730 * The XDR decode routines may have pre-set op->status; 1731 * for example, if there is a miscellaneous XDR error 1732 * it will be set to nfserr_bad_xdr. 1733 */ 1734 if (op->status) { 1735 if (op->opnum == OP_OPEN) 1736 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1737 goto encode_op; 1738 } 1739 1740 if (!current_fh->fh_dentry) { 1741 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1742 op->status = nfserr_nofilehandle; 1743 goto encode_op; 1744 } 1745 } else if (current_fh->fh_export->ex_fslocs.migrated && 1746 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1747 op->status = nfserr_moved; 1748 goto encode_op; 1749 } 1750 1751 fh_clear_wcc(current_fh); 1752 1753 /* If op is non-idempotent */ 1754 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1755 /* 1756 * Don't execute this op if we couldn't encode a 1757 * succesful reply: 1758 */ 1759 u32 plen = op->opdesc->op_rsize_bop(rqstp, op); 1760 /* 1761 * Plus if there's another operation, make sure 1762 * we'll have space to at least encode an error: 1763 */ 1764 if (resp->opcnt < args->opcnt) 1765 plen += COMPOUND_ERR_SLACK_SPACE; 1766 op->status = nfsd4_check_resp_size(resp, plen); 1767 } 1768 1769 if (op->status) 1770 goto encode_op; 1771 1772 if (op->opdesc->op_get_currentstateid) 1773 op->opdesc->op_get_currentstateid(cstate, &op->u); 1774 op->status = op->opdesc->op_func(rqstp, cstate, &op->u); 1775 1776 /* Only from SEQUENCE */ 1777 if (cstate->status == nfserr_replay_cache) { 1778 dprintk("%s NFS4.1 replay from cache\n", __func__); 1779 status = op->status; 1780 goto out; 1781 } 1782 if (!op->status) { 1783 if (op->opdesc->op_set_currentstateid) 1784 op->opdesc->op_set_currentstateid(cstate, &op->u); 1785 1786 if (op->opdesc->op_flags & OP_CLEAR_STATEID) 1787 clear_current_stateid(cstate); 1788 1789 if (need_wrongsec_check(rqstp)) 1790 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 1791 } 1792 encode_op: 1793 if (op->status == nfserr_replay_me) { 1794 op->replay = &cstate->replay_owner->so_replay; 1795 nfsd4_encode_replay(&resp->xdr, op); 1796 status = op->status = op->replay->rp_status; 1797 } else { 1798 nfsd4_encode_operation(resp, op); 1799 status = op->status; 1800 } 1801 1802 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1803 args->ops, args->opcnt, resp->opcnt, op->opnum, 1804 be32_to_cpu(status)); 1805 1806 nfsd4_cstate_clear_replay(cstate); 1807 nfsd4_increment_op_stats(op->opnum); 1808 } 1809 1810 cstate->status = status; 1811 fh_put(current_fh); 1812 fh_put(save_fh); 1813 BUG_ON(cstate->replay_owner); 1814 out: 1815 /* Reset deferral mechanism for RPC deferrals */ 1816 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1817 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1818 return status; 1819 } 1820 1821 #define op_encode_hdr_size (2) 1822 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1823 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1824 #define op_encode_change_info_maxsz (5) 1825 #define nfs4_fattr_bitmap_maxsz (4) 1826 1827 /* We'll fall back on returning no lockowner if run out of space: */ 1828 #define op_encode_lockowner_maxsz (0) 1829 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1830 1831 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1832 1833 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1834 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1835 op_encode_ace_maxsz) 1836 1837 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1838 1839 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1840 { 1841 return (op_encode_hdr_size) * sizeof(__be32); 1842 } 1843 1844 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1845 { 1846 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1847 } 1848 1849 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1850 { 1851 /* ac_supported, ac_resp_access */ 1852 return (op_encode_hdr_size + 2)* sizeof(__be32); 1853 } 1854 1855 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1856 { 1857 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1858 } 1859 1860 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1861 { 1862 return (op_encode_hdr_size + op_encode_change_info_maxsz 1863 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1864 } 1865 1866 /* 1867 * Note since this is an idempotent operation we won't insist on failing 1868 * the op prematurely if the estimate is too large. We may turn off splice 1869 * reads unnecessarily. 1870 */ 1871 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1872 struct nfsd4_op *op) 1873 { 1874 u32 *bmap = op->u.getattr.ga_bmval; 1875 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1876 u32 ret = 0; 1877 1878 if (bmap0 & FATTR4_WORD0_ACL) 1879 return svc_max_payload(rqstp); 1880 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1881 return svc_max_payload(rqstp); 1882 1883 if (bmap1 & FATTR4_WORD1_OWNER) { 1884 ret += IDMAP_NAMESZ + 4; 1885 bmap1 &= ~FATTR4_WORD1_OWNER; 1886 } 1887 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1888 ret += IDMAP_NAMESZ + 4; 1889 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1890 } 1891 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1892 ret += NFS4_FHSIZE + 4; 1893 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1894 } 1895 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1896 ret += NFS4_MAXLABELLEN + 12; 1897 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1898 } 1899 /* 1900 * Largest of remaining attributes are 16 bytes (e.g., 1901 * supported_attributes) 1902 */ 1903 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1904 /* bitmask, length */ 1905 ret += 20; 1906 return ret; 1907 } 1908 1909 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1910 { 1911 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE; 1912 } 1913 1914 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1915 { 1916 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1917 * sizeof(__be32); 1918 } 1919 1920 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1921 { 1922 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1923 * sizeof(__be32); 1924 } 1925 1926 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1927 { 1928 return (op_encode_hdr_size + op_encode_stateid_maxsz 1929 + op_encode_change_info_maxsz + 1 1930 + nfs4_fattr_bitmap_maxsz 1931 + op_encode_delegation_maxsz) * sizeof(__be32); 1932 } 1933 1934 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1935 { 1936 u32 maxcount = 0, rlen = 0; 1937 1938 maxcount = svc_max_payload(rqstp); 1939 rlen = min(op->u.read.rd_length, maxcount); 1940 1941 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1942 } 1943 1944 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1945 { 1946 u32 maxcount = 0, rlen = 0; 1947 1948 maxcount = svc_max_payload(rqstp); 1949 rlen = min(op->u.readdir.rd_maxcount, maxcount); 1950 1951 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1952 XDR_QUADLEN(rlen)) * sizeof(__be32); 1953 } 1954 1955 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1956 { 1957 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE; 1958 } 1959 1960 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1961 { 1962 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1963 * sizeof(__be32); 1964 } 1965 1966 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1967 { 1968 return (op_encode_hdr_size + op_encode_change_info_maxsz 1969 + op_encode_change_info_maxsz) * sizeof(__be32); 1970 } 1971 1972 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1973 struct nfsd4_op *op) 1974 { 1975 return (op_encode_hdr_size 1976 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 1977 } 1978 1979 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1980 { 1981 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids) 1982 * sizeof(__be32); 1983 } 1984 1985 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1986 { 1987 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1988 } 1989 1990 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1991 { 1992 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR * 1993 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32); 1994 } 1995 1996 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1997 { 1998 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1999 sizeof(__be32); 2000 } 2001 2002 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2003 { 2004 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 2005 } 2006 2007 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2008 { 2009 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 2010 1 + 1 + /* eir_flags, spr_how */\ 2011 4 + /* spo_must_enforce & _allow with bitmap */\ 2012 2 + /*eir_server_owner.so_minor_id */\ 2013 /* eir_server_owner.so_major_id<> */\ 2014 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2015 /* eir_server_scope<> */\ 2016 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2017 1 + /* eir_server_impl_id array length */\ 2018 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 2019 } 2020 2021 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2022 { 2023 return (op_encode_hdr_size + \ 2024 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 2025 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 2026 } 2027 2028 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2029 { 2030 return (op_encode_hdr_size + \ 2031 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 2032 2 + /* csr_sequence, csr_flags */\ 2033 op_encode_channel_attrs_maxsz + \ 2034 op_encode_channel_attrs_maxsz) * sizeof(__be32); 2035 } 2036 2037 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2038 { 2039 return (op_encode_hdr_size + 2040 1 /* wr_callback */ + 2041 op_encode_stateid_maxsz /* wr_callback */ + 2042 2 /* wr_count */ + 2043 1 /* wr_committed */ + 2044 op_encode_verifier_maxsz + 2045 1 /* cr_consecutive */ + 2046 1 /* cr_synchronous */) * sizeof(__be32); 2047 } 2048 2049 #ifdef CONFIG_NFSD_PNFS 2050 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2051 { 2052 u32 maxcount = 0, rlen = 0; 2053 2054 maxcount = svc_max_payload(rqstp); 2055 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount); 2056 2057 return (op_encode_hdr_size + 2058 1 /* gd_layout_type*/ + 2059 XDR_QUADLEN(rlen) + 2060 2 /* gd_notify_types */) * sizeof(__be32); 2061 } 2062 2063 /* 2064 * At this stage we don't really know what layout driver will handle the request, 2065 * so we need to define an arbitrary upper bound here. 2066 */ 2067 #define MAX_LAYOUT_SIZE 128 2068 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2069 { 2070 return (op_encode_hdr_size + 2071 1 /* logr_return_on_close */ + 2072 op_encode_stateid_maxsz + 2073 1 /* nr of layouts */ + 2074 MAX_LAYOUT_SIZE) * sizeof(__be32); 2075 } 2076 2077 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2078 { 2079 return (op_encode_hdr_size + 2080 1 /* locr_newsize */ + 2081 2 /* ns_size */) * sizeof(__be32); 2082 } 2083 2084 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2085 { 2086 return (op_encode_hdr_size + 2087 1 /* lrs_stateid */ + 2088 op_encode_stateid_maxsz) * sizeof(__be32); 2089 } 2090 #endif /* CONFIG_NFSD_PNFS */ 2091 2092 2093 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2094 { 2095 return (op_encode_hdr_size + 3) * sizeof(__be32); 2096 } 2097 2098 static const struct nfsd4_operation nfsd4_ops[] = { 2099 [OP_ACCESS] = { 2100 .op_func = nfsd4_access, 2101 .op_name = "OP_ACCESS", 2102 .op_rsize_bop = nfsd4_access_rsize, 2103 }, 2104 [OP_CLOSE] = { 2105 .op_func = nfsd4_close, 2106 .op_flags = OP_MODIFIES_SOMETHING, 2107 .op_name = "OP_CLOSE", 2108 .op_rsize_bop = nfsd4_status_stateid_rsize, 2109 .op_get_currentstateid = nfsd4_get_closestateid, 2110 .op_set_currentstateid = nfsd4_set_closestateid, 2111 }, 2112 [OP_COMMIT] = { 2113 .op_func = nfsd4_commit, 2114 .op_flags = OP_MODIFIES_SOMETHING, 2115 .op_name = "OP_COMMIT", 2116 .op_rsize_bop = nfsd4_commit_rsize, 2117 }, 2118 [OP_CREATE] = { 2119 .op_func = nfsd4_create, 2120 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2121 .op_name = "OP_CREATE", 2122 .op_rsize_bop = nfsd4_create_rsize, 2123 }, 2124 [OP_DELEGRETURN] = { 2125 .op_func = nfsd4_delegreturn, 2126 .op_flags = OP_MODIFIES_SOMETHING, 2127 .op_name = "OP_DELEGRETURN", 2128 .op_rsize_bop = nfsd4_only_status_rsize, 2129 .op_get_currentstateid = nfsd4_get_delegreturnstateid, 2130 }, 2131 [OP_GETATTR] = { 2132 .op_func = nfsd4_getattr, 2133 .op_flags = ALLOWED_ON_ABSENT_FS, 2134 .op_rsize_bop = nfsd4_getattr_rsize, 2135 .op_name = "OP_GETATTR", 2136 }, 2137 [OP_GETFH] = { 2138 .op_func = nfsd4_getfh, 2139 .op_name = "OP_GETFH", 2140 .op_rsize_bop = nfsd4_getfh_rsize, 2141 }, 2142 [OP_LINK] = { 2143 .op_func = nfsd4_link, 2144 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2145 | OP_CACHEME, 2146 .op_name = "OP_LINK", 2147 .op_rsize_bop = nfsd4_link_rsize, 2148 }, 2149 [OP_LOCK] = { 2150 .op_func = nfsd4_lock, 2151 .op_flags = OP_MODIFIES_SOMETHING | 2152 OP_NONTRIVIAL_ERROR_ENCODE, 2153 .op_name = "OP_LOCK", 2154 .op_rsize_bop = nfsd4_lock_rsize, 2155 .op_set_currentstateid = nfsd4_set_lockstateid, 2156 }, 2157 [OP_LOCKT] = { 2158 .op_func = nfsd4_lockt, 2159 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE, 2160 .op_name = "OP_LOCKT", 2161 .op_rsize_bop = nfsd4_lock_rsize, 2162 }, 2163 [OP_LOCKU] = { 2164 .op_func = nfsd4_locku, 2165 .op_flags = OP_MODIFIES_SOMETHING, 2166 .op_name = "OP_LOCKU", 2167 .op_rsize_bop = nfsd4_status_stateid_rsize, 2168 .op_get_currentstateid = nfsd4_get_lockustateid, 2169 }, 2170 [OP_LOOKUP] = { 2171 .op_func = nfsd4_lookup, 2172 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2173 .op_name = "OP_LOOKUP", 2174 .op_rsize_bop = nfsd4_only_status_rsize, 2175 }, 2176 [OP_LOOKUPP] = { 2177 .op_func = nfsd4_lookupp, 2178 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2179 .op_name = "OP_LOOKUPP", 2180 .op_rsize_bop = nfsd4_only_status_rsize, 2181 }, 2182 [OP_NVERIFY] = { 2183 .op_func = nfsd4_nverify, 2184 .op_name = "OP_NVERIFY", 2185 .op_rsize_bop = nfsd4_only_status_rsize, 2186 }, 2187 [OP_OPEN] = { 2188 .op_func = nfsd4_open, 2189 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2190 .op_name = "OP_OPEN", 2191 .op_rsize_bop = nfsd4_open_rsize, 2192 .op_set_currentstateid = nfsd4_set_openstateid, 2193 }, 2194 [OP_OPEN_CONFIRM] = { 2195 .op_func = nfsd4_open_confirm, 2196 .op_flags = OP_MODIFIES_SOMETHING, 2197 .op_name = "OP_OPEN_CONFIRM", 2198 .op_rsize_bop = nfsd4_status_stateid_rsize, 2199 }, 2200 [OP_OPEN_DOWNGRADE] = { 2201 .op_func = nfsd4_open_downgrade, 2202 .op_flags = OP_MODIFIES_SOMETHING, 2203 .op_name = "OP_OPEN_DOWNGRADE", 2204 .op_rsize_bop = nfsd4_status_stateid_rsize, 2205 .op_get_currentstateid = nfsd4_get_opendowngradestateid, 2206 .op_set_currentstateid = nfsd4_set_opendowngradestateid, 2207 }, 2208 [OP_PUTFH] = { 2209 .op_func = nfsd4_putfh, 2210 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2211 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2212 .op_name = "OP_PUTFH", 2213 .op_rsize_bop = nfsd4_only_status_rsize, 2214 }, 2215 [OP_PUTPUBFH] = { 2216 .op_func = nfsd4_putrootfh, 2217 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2218 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2219 .op_name = "OP_PUTPUBFH", 2220 .op_rsize_bop = nfsd4_only_status_rsize, 2221 }, 2222 [OP_PUTROOTFH] = { 2223 .op_func = nfsd4_putrootfh, 2224 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2225 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2226 .op_name = "OP_PUTROOTFH", 2227 .op_rsize_bop = nfsd4_only_status_rsize, 2228 }, 2229 [OP_READ] = { 2230 .op_func = nfsd4_read, 2231 .op_release = nfsd4_read_release, 2232 .op_name = "OP_READ", 2233 .op_rsize_bop = nfsd4_read_rsize, 2234 .op_get_currentstateid = nfsd4_get_readstateid, 2235 }, 2236 [OP_READDIR] = { 2237 .op_func = nfsd4_readdir, 2238 .op_name = "OP_READDIR", 2239 .op_rsize_bop = nfsd4_readdir_rsize, 2240 }, 2241 [OP_READLINK] = { 2242 .op_func = nfsd4_readlink, 2243 .op_name = "OP_READLINK", 2244 .op_rsize_bop = nfsd4_readlink_rsize, 2245 }, 2246 [OP_REMOVE] = { 2247 .op_func = nfsd4_remove, 2248 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2249 .op_name = "OP_REMOVE", 2250 .op_rsize_bop = nfsd4_remove_rsize, 2251 }, 2252 [OP_RENAME] = { 2253 .op_func = nfsd4_rename, 2254 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2255 .op_name = "OP_RENAME", 2256 .op_rsize_bop = nfsd4_rename_rsize, 2257 }, 2258 [OP_RENEW] = { 2259 .op_func = nfsd4_renew, 2260 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2261 | OP_MODIFIES_SOMETHING, 2262 .op_name = "OP_RENEW", 2263 .op_rsize_bop = nfsd4_only_status_rsize, 2264 2265 }, 2266 [OP_RESTOREFH] = { 2267 .op_func = nfsd4_restorefh, 2268 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2269 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2270 .op_name = "OP_RESTOREFH", 2271 .op_rsize_bop = nfsd4_only_status_rsize, 2272 }, 2273 [OP_SAVEFH] = { 2274 .op_func = nfsd4_savefh, 2275 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2276 .op_name = "OP_SAVEFH", 2277 .op_rsize_bop = nfsd4_only_status_rsize, 2278 }, 2279 [OP_SECINFO] = { 2280 .op_func = nfsd4_secinfo, 2281 .op_release = nfsd4_secinfo_release, 2282 .op_flags = OP_HANDLES_WRONGSEC, 2283 .op_name = "OP_SECINFO", 2284 .op_rsize_bop = nfsd4_secinfo_rsize, 2285 }, 2286 [OP_SETATTR] = { 2287 .op_func = nfsd4_setattr, 2288 .op_name = "OP_SETATTR", 2289 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME 2290 | OP_NONTRIVIAL_ERROR_ENCODE, 2291 .op_rsize_bop = nfsd4_setattr_rsize, 2292 .op_get_currentstateid = nfsd4_get_setattrstateid, 2293 }, 2294 [OP_SETCLIENTID] = { 2295 .op_func = nfsd4_setclientid, 2296 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2297 | OP_MODIFIES_SOMETHING | OP_CACHEME 2298 | OP_NONTRIVIAL_ERROR_ENCODE, 2299 .op_name = "OP_SETCLIENTID", 2300 .op_rsize_bop = nfsd4_setclientid_rsize, 2301 }, 2302 [OP_SETCLIENTID_CONFIRM] = { 2303 .op_func = nfsd4_setclientid_confirm, 2304 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2305 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2306 .op_name = "OP_SETCLIENTID_CONFIRM", 2307 .op_rsize_bop = nfsd4_only_status_rsize, 2308 }, 2309 [OP_VERIFY] = { 2310 .op_func = nfsd4_verify, 2311 .op_name = "OP_VERIFY", 2312 .op_rsize_bop = nfsd4_only_status_rsize, 2313 }, 2314 [OP_WRITE] = { 2315 .op_func = nfsd4_write, 2316 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2317 .op_name = "OP_WRITE", 2318 .op_rsize_bop = nfsd4_write_rsize, 2319 .op_get_currentstateid = nfsd4_get_writestateid, 2320 }, 2321 [OP_RELEASE_LOCKOWNER] = { 2322 .op_func = nfsd4_release_lockowner, 2323 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2324 | OP_MODIFIES_SOMETHING, 2325 .op_name = "OP_RELEASE_LOCKOWNER", 2326 .op_rsize_bop = nfsd4_only_status_rsize, 2327 }, 2328 2329 /* NFSv4.1 operations */ 2330 [OP_EXCHANGE_ID] = { 2331 .op_func = nfsd4_exchange_id, 2332 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2333 | OP_MODIFIES_SOMETHING, 2334 .op_name = "OP_EXCHANGE_ID", 2335 .op_rsize_bop = nfsd4_exchange_id_rsize, 2336 }, 2337 [OP_BACKCHANNEL_CTL] = { 2338 .op_func = nfsd4_backchannel_ctl, 2339 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2340 .op_name = "OP_BACKCHANNEL_CTL", 2341 .op_rsize_bop = nfsd4_only_status_rsize, 2342 }, 2343 [OP_BIND_CONN_TO_SESSION] = { 2344 .op_func = nfsd4_bind_conn_to_session, 2345 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2346 | OP_MODIFIES_SOMETHING, 2347 .op_name = "OP_BIND_CONN_TO_SESSION", 2348 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize, 2349 }, 2350 [OP_CREATE_SESSION] = { 2351 .op_func = nfsd4_create_session, 2352 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2353 | OP_MODIFIES_SOMETHING, 2354 .op_name = "OP_CREATE_SESSION", 2355 .op_rsize_bop = nfsd4_create_session_rsize, 2356 }, 2357 [OP_DESTROY_SESSION] = { 2358 .op_func = nfsd4_destroy_session, 2359 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2360 | OP_MODIFIES_SOMETHING, 2361 .op_name = "OP_DESTROY_SESSION", 2362 .op_rsize_bop = nfsd4_only_status_rsize, 2363 }, 2364 [OP_SEQUENCE] = { 2365 .op_func = nfsd4_sequence, 2366 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 2367 .op_name = "OP_SEQUENCE", 2368 .op_rsize_bop = nfsd4_sequence_rsize, 2369 }, 2370 [OP_DESTROY_CLIENTID] = { 2371 .op_func = nfsd4_destroy_clientid, 2372 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2373 | OP_MODIFIES_SOMETHING, 2374 .op_name = "OP_DESTROY_CLIENTID", 2375 .op_rsize_bop = nfsd4_only_status_rsize, 2376 }, 2377 [OP_RECLAIM_COMPLETE] = { 2378 .op_func = nfsd4_reclaim_complete, 2379 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2380 .op_name = "OP_RECLAIM_COMPLETE", 2381 .op_rsize_bop = nfsd4_only_status_rsize, 2382 }, 2383 [OP_SECINFO_NO_NAME] = { 2384 .op_func = nfsd4_secinfo_no_name, 2385 .op_release = nfsd4_secinfo_no_name_release, 2386 .op_flags = OP_HANDLES_WRONGSEC, 2387 .op_name = "OP_SECINFO_NO_NAME", 2388 .op_rsize_bop = nfsd4_secinfo_rsize, 2389 }, 2390 [OP_TEST_STATEID] = { 2391 .op_func = nfsd4_test_stateid, 2392 .op_flags = ALLOWED_WITHOUT_FH, 2393 .op_name = "OP_TEST_STATEID", 2394 .op_rsize_bop = nfsd4_test_stateid_rsize, 2395 }, 2396 [OP_FREE_STATEID] = { 2397 .op_func = nfsd4_free_stateid, 2398 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2399 .op_name = "OP_FREE_STATEID", 2400 .op_get_currentstateid = nfsd4_get_freestateid, 2401 .op_rsize_bop = nfsd4_only_status_rsize, 2402 }, 2403 #ifdef CONFIG_NFSD_PNFS 2404 [OP_GETDEVICEINFO] = { 2405 .op_func = nfsd4_getdeviceinfo, 2406 .op_release = nfsd4_getdeviceinfo_release, 2407 .op_flags = ALLOWED_WITHOUT_FH, 2408 .op_name = "OP_GETDEVICEINFO", 2409 .op_rsize_bop = nfsd4_getdeviceinfo_rsize, 2410 }, 2411 [OP_LAYOUTGET] = { 2412 .op_func = nfsd4_layoutget, 2413 .op_release = nfsd4_layoutget_release, 2414 .op_flags = OP_MODIFIES_SOMETHING, 2415 .op_name = "OP_LAYOUTGET", 2416 .op_rsize_bop = nfsd4_layoutget_rsize, 2417 }, 2418 [OP_LAYOUTCOMMIT] = { 2419 .op_func = nfsd4_layoutcommit, 2420 .op_flags = OP_MODIFIES_SOMETHING, 2421 .op_name = "OP_LAYOUTCOMMIT", 2422 .op_rsize_bop = nfsd4_layoutcommit_rsize, 2423 }, 2424 [OP_LAYOUTRETURN] = { 2425 .op_func = nfsd4_layoutreturn, 2426 .op_flags = OP_MODIFIES_SOMETHING, 2427 .op_name = "OP_LAYOUTRETURN", 2428 .op_rsize_bop = nfsd4_layoutreturn_rsize, 2429 }, 2430 #endif /* CONFIG_NFSD_PNFS */ 2431 2432 /* NFSv4.2 operations */ 2433 [OP_ALLOCATE] = { 2434 .op_func = nfsd4_allocate, 2435 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2436 .op_name = "OP_ALLOCATE", 2437 .op_rsize_bop = nfsd4_only_status_rsize, 2438 }, 2439 [OP_DEALLOCATE] = { 2440 .op_func = nfsd4_deallocate, 2441 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2442 .op_name = "OP_DEALLOCATE", 2443 .op_rsize_bop = nfsd4_only_status_rsize, 2444 }, 2445 [OP_CLONE] = { 2446 .op_func = nfsd4_clone, 2447 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2448 .op_name = "OP_CLONE", 2449 .op_rsize_bop = nfsd4_only_status_rsize, 2450 }, 2451 [OP_COPY] = { 2452 .op_func = nfsd4_copy, 2453 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2454 .op_name = "OP_COPY", 2455 .op_rsize_bop = nfsd4_copy_rsize, 2456 }, 2457 [OP_SEEK] = { 2458 .op_func = nfsd4_seek, 2459 .op_name = "OP_SEEK", 2460 .op_rsize_bop = nfsd4_seek_rsize, 2461 }, 2462 }; 2463 2464 /** 2465 * nfsd4_spo_must_allow - Determine if the compound op contains an 2466 * operation that is allowed to be sent with machine credentials 2467 * 2468 * @rqstp: a pointer to the struct svc_rqst 2469 * 2470 * Checks to see if the compound contains a spo_must_allow op 2471 * and confirms that it was sent with the proper machine creds. 2472 */ 2473 2474 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 2475 { 2476 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2477 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2478 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2479 struct nfsd4_compound_state *cstate = &resp->cstate; 2480 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 2481 u32 opiter; 2482 2483 if (!cstate->minorversion) 2484 return false; 2485 2486 if (cstate->spo_must_allowed == true) 2487 return true; 2488 2489 opiter = resp->opcnt; 2490 while (opiter < argp->opcnt) { 2491 this = &argp->ops[opiter++]; 2492 if (test_bit(this->opnum, allow->u.longs) && 2493 cstate->clp->cl_mach_cred && 2494 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 2495 cstate->spo_must_allowed = true; 2496 return true; 2497 } 2498 } 2499 cstate->spo_must_allowed = false; 2500 return false; 2501 } 2502 2503 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 2504 { 2505 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp) 2506 return op_encode_hdr_size * sizeof(__be32); 2507 2508 BUG_ON(OPDESC(op)->op_rsize_bop == NULL); 2509 return OPDESC(op)->op_rsize_bop(rqstp, op); 2510 } 2511 2512 void warn_on_nonidempotent_op(struct nfsd4_op *op) 2513 { 2514 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 2515 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 2516 op->opnum, nfsd4_op_name(op->opnum)); 2517 WARN_ON_ONCE(1); 2518 } 2519 } 2520 2521 static const char *nfsd4_op_name(unsigned opnum) 2522 { 2523 if (opnum < ARRAY_SIZE(nfsd4_ops)) 2524 return nfsd4_ops[opnum].op_name; 2525 return "unknown_operation"; 2526 } 2527 2528 #define nfsd4_voidres nfsd4_voidargs 2529 struct nfsd4_voidargs { int dummy; }; 2530 2531 static const struct svc_procedure nfsd_procedures4[2] = { 2532 [NFSPROC4_NULL] = { 2533 .pc_func = nfsd4_proc_null, 2534 .pc_encode = nfs4svc_encode_voidres, 2535 .pc_argsize = sizeof(struct nfsd4_voidargs), 2536 .pc_ressize = sizeof(struct nfsd4_voidres), 2537 .pc_cachetype = RC_NOCACHE, 2538 .pc_xdrressize = 1, 2539 }, 2540 [NFSPROC4_COMPOUND] = { 2541 .pc_func = nfsd4_proc_compound, 2542 .pc_decode = nfs4svc_decode_compoundargs, 2543 .pc_encode = nfs4svc_encode_compoundres, 2544 .pc_argsize = sizeof(struct nfsd4_compoundargs), 2545 .pc_ressize = sizeof(struct nfsd4_compoundres), 2546 .pc_release = nfsd4_release_compoundargs, 2547 .pc_cachetype = RC_NOCACHE, 2548 .pc_xdrressize = NFSD_BUFSIZE/4, 2549 }, 2550 }; 2551 2552 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)]; 2553 const struct svc_version nfsd_version4 = { 2554 .vs_vers = 4, 2555 .vs_nproc = 2, 2556 .vs_proc = nfsd_procedures4, 2557 .vs_count = nfsd_count3, 2558 .vs_dispatch = nfsd_dispatch, 2559 .vs_xdrsize = NFS4_SVC_XDRSIZE, 2560 .vs_rpcb_optnl = true, 2561 .vs_need_cong_ctrl = true, 2562 }; 2563 2564 /* 2565 * Local variables: 2566 * c-basic-offset: 8 2567 * End: 2568 */ 2569