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 __be32 931 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 932 union nfsd4_op_u *u) 933 { 934 struct nfsd4_setattr *setattr = &u->setattr; 935 __be32 status = nfs_ok; 936 int err; 937 938 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 939 status = nfs4_preprocess_stateid_op(rqstp, cstate, 940 &cstate->current_fh, &setattr->sa_stateid, 941 WR_STATE, NULL, NULL); 942 if (status) { 943 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 944 return status; 945 } 946 } 947 err = fh_want_write(&cstate->current_fh); 948 if (err) 949 return nfserrno(err); 950 status = nfs_ok; 951 952 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 953 nfsd_attrmask); 954 if (status) 955 goto out; 956 957 if (setattr->sa_acl != NULL) 958 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 959 setattr->sa_acl); 960 if (status) 961 goto out; 962 if (setattr->sa_label.len) 963 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 964 &setattr->sa_label); 965 if (status) 966 goto out; 967 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 968 0, (time_t)0); 969 out: 970 fh_drop_write(&cstate->current_fh); 971 return status; 972 } 973 974 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 975 { 976 int i = 1; 977 int buflen = write->wr_buflen; 978 979 vec[0].iov_base = write->wr_head.iov_base; 980 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 981 buflen -= vec[0].iov_len; 982 983 while (buflen) { 984 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 985 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 986 buflen -= vec[i].iov_len; 987 i++; 988 } 989 return i; 990 } 991 992 static __be32 993 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 994 union nfsd4_op_u *u) 995 { 996 struct nfsd4_write *write = &u->write; 997 stateid_t *stateid = &write->wr_stateid; 998 struct file *filp = NULL; 999 __be32 status = nfs_ok; 1000 unsigned long cnt; 1001 int nvecs; 1002 1003 if (write->wr_offset >= OFFSET_MAX) 1004 return nfserr_inval; 1005 1006 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1007 stateid, WR_STATE, &filp, NULL); 1008 if (status) { 1009 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 1010 return status; 1011 } 1012 1013 cnt = write->wr_buflen; 1014 write->wr_how_written = write->wr_stable_how; 1015 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 1016 1017 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1018 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1019 1020 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp, 1021 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 1022 write->wr_how_written); 1023 fput(filp); 1024 1025 write->wr_bytes_written = cnt; 1026 1027 return status; 1028 } 1029 1030 static __be32 1031 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1032 stateid_t *src_stateid, struct file **src, 1033 stateid_t *dst_stateid, struct file **dst) 1034 { 1035 __be32 status; 1036 1037 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, 1038 src_stateid, RD_STATE, src, NULL); 1039 if (status) { 1040 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); 1041 goto out; 1042 } 1043 1044 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1045 dst_stateid, WR_STATE, dst, NULL); 1046 if (status) { 1047 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); 1048 goto out_put_src; 1049 } 1050 1051 /* fix up for NFS-specific error code */ 1052 if (!S_ISREG(file_inode(*src)->i_mode) || 1053 !S_ISREG(file_inode(*dst)->i_mode)) { 1054 status = nfserr_wrong_type; 1055 goto out_put_dst; 1056 } 1057 1058 out: 1059 return status; 1060 out_put_dst: 1061 fput(*dst); 1062 out_put_src: 1063 fput(*src); 1064 goto out; 1065 } 1066 1067 static __be32 1068 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1069 union nfsd4_op_u *u) 1070 { 1071 struct nfsd4_clone *clone = &u->clone; 1072 struct file *src, *dst; 1073 __be32 status; 1074 1075 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src, 1076 &clone->cl_dst_stateid, &dst); 1077 if (status) 1078 goto out; 1079 1080 status = nfsd4_clone_file_range(src, clone->cl_src_pos, 1081 dst, clone->cl_dst_pos, clone->cl_count); 1082 1083 fput(dst); 1084 fput(src); 1085 out: 1086 return status; 1087 } 1088 1089 static __be32 1090 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1091 union nfsd4_op_u *u) 1092 { 1093 struct nfsd4_copy *copy = &u->copy; 1094 struct file *src, *dst; 1095 __be32 status; 1096 ssize_t bytes; 1097 1098 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, &src, 1099 ©->cp_dst_stateid, &dst); 1100 if (status) 1101 goto out; 1102 1103 bytes = nfsd_copy_file_range(src, copy->cp_src_pos, 1104 dst, copy->cp_dst_pos, copy->cp_count); 1105 1106 if (bytes < 0) 1107 status = nfserrno(bytes); 1108 else { 1109 copy->cp_res.wr_bytes_written = bytes; 1110 copy->cp_res.wr_stable_how = NFS_UNSTABLE; 1111 copy->cp_consecutive = 1; 1112 copy->cp_synchronous = 1; 1113 gen_boot_verifier(©->cp_res.wr_verifier, SVC_NET(rqstp)); 1114 status = nfs_ok; 1115 } 1116 1117 fput(src); 1118 fput(dst); 1119 out: 1120 return status; 1121 } 1122 1123 static __be32 1124 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1125 struct nfsd4_fallocate *fallocate, int flags) 1126 { 1127 __be32 status = nfserr_notsupp; 1128 struct file *file; 1129 1130 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1131 &fallocate->falloc_stateid, 1132 WR_STATE, &file, NULL); 1133 if (status != nfs_ok) { 1134 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1135 return status; 1136 } 1137 1138 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file, 1139 fallocate->falloc_offset, 1140 fallocate->falloc_length, 1141 flags); 1142 fput(file); 1143 return status; 1144 } 1145 1146 static __be32 1147 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1148 union nfsd4_op_u *u) 1149 { 1150 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0); 1151 } 1152 1153 static __be32 1154 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1155 union nfsd4_op_u *u) 1156 { 1157 return nfsd4_fallocate(rqstp, cstate, &u->deallocate, 1158 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1159 } 1160 1161 static __be32 1162 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1163 union nfsd4_op_u *u) 1164 { 1165 struct nfsd4_seek *seek = &u->seek; 1166 int whence; 1167 __be32 status; 1168 struct file *file; 1169 1170 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1171 &seek->seek_stateid, 1172 RD_STATE, &file, NULL); 1173 if (status) { 1174 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1175 return status; 1176 } 1177 1178 switch (seek->seek_whence) { 1179 case NFS4_CONTENT_DATA: 1180 whence = SEEK_DATA; 1181 break; 1182 case NFS4_CONTENT_HOLE: 1183 whence = SEEK_HOLE; 1184 break; 1185 default: 1186 status = nfserr_union_notsupp; 1187 goto out; 1188 } 1189 1190 /* 1191 * Note: This call does change file->f_pos, but nothing in NFSD 1192 * should ever file->f_pos. 1193 */ 1194 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); 1195 if (seek->seek_pos < 0) 1196 status = nfserrno(seek->seek_pos); 1197 else if (seek->seek_pos >= i_size_read(file_inode(file))) 1198 seek->seek_eof = true; 1199 1200 out: 1201 fput(file); 1202 return status; 1203 } 1204 1205 /* This routine never returns NFS_OK! If there are no other errors, it 1206 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1207 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1208 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1209 */ 1210 static __be32 1211 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1212 struct nfsd4_verify *verify) 1213 { 1214 __be32 *buf, *p; 1215 int count; 1216 __be32 status; 1217 1218 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1219 if (status) 1220 return status; 1221 1222 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1223 if (status) 1224 return status; 1225 1226 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1227 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1228 return nfserr_inval; 1229 if (verify->ve_attrlen & 3) 1230 return nfserr_inval; 1231 1232 /* count in words: 1233 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1234 */ 1235 count = 4 + (verify->ve_attrlen >> 2); 1236 buf = kmalloc(count << 2, GFP_KERNEL); 1237 if (!buf) 1238 return nfserr_jukebox; 1239 1240 p = buf; 1241 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1242 cstate->current_fh.fh_export, 1243 cstate->current_fh.fh_dentry, 1244 verify->ve_bmval, 1245 rqstp, 0); 1246 /* 1247 * If nfsd4_encode_fattr() ran out of space, assume that's because 1248 * the attributes are longer (hence different) than those given: 1249 */ 1250 if (status == nfserr_resource) 1251 status = nfserr_not_same; 1252 if (status) 1253 goto out_kfree; 1254 1255 /* skip bitmap */ 1256 p = buf + 1 + ntohl(buf[0]); 1257 status = nfserr_not_same; 1258 if (ntohl(*p++) != verify->ve_attrlen) 1259 goto out_kfree; 1260 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1261 status = nfserr_same; 1262 1263 out_kfree: 1264 kfree(buf); 1265 return status; 1266 } 1267 1268 static __be32 1269 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1270 union nfsd4_op_u *u) 1271 { 1272 __be32 status; 1273 1274 status = _nfsd4_verify(rqstp, cstate, &u->verify); 1275 return status == nfserr_not_same ? nfs_ok : status; 1276 } 1277 1278 static __be32 1279 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1280 union nfsd4_op_u *u) 1281 { 1282 __be32 status; 1283 1284 status = _nfsd4_verify(rqstp, cstate, &u->nverify); 1285 return status == nfserr_same ? nfs_ok : status; 1286 } 1287 1288 #ifdef CONFIG_NFSD_PNFS 1289 static const struct nfsd4_layout_ops * 1290 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1291 { 1292 if (!exp->ex_layout_types) { 1293 dprintk("%s: export does not support pNFS\n", __func__); 1294 return NULL; 1295 } 1296 1297 if (layout_type >= LAYOUT_TYPE_MAX || 1298 !(exp->ex_layout_types & (1 << layout_type))) { 1299 dprintk("%s: layout type %d not supported\n", 1300 __func__, layout_type); 1301 return NULL; 1302 } 1303 1304 return nfsd4_layout_ops[layout_type]; 1305 } 1306 1307 static __be32 1308 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1309 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1310 { 1311 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo; 1312 const struct nfsd4_layout_ops *ops; 1313 struct nfsd4_deviceid_map *map; 1314 struct svc_export *exp; 1315 __be32 nfserr; 1316 1317 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1318 __func__, 1319 gdp->gd_layout_type, 1320 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1321 gdp->gd_maxcount); 1322 1323 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1324 if (!map) { 1325 dprintk("%s: couldn't find device ID to export mapping!\n", 1326 __func__); 1327 return nfserr_noent; 1328 } 1329 1330 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1331 if (IS_ERR(exp)) { 1332 dprintk("%s: could not find device id\n", __func__); 1333 return nfserr_noent; 1334 } 1335 1336 nfserr = nfserr_layoutunavailable; 1337 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1338 if (!ops) 1339 goto out; 1340 1341 nfserr = nfs_ok; 1342 if (gdp->gd_maxcount != 0) { 1343 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1344 rqstp, cstate->session->se_client, gdp); 1345 } 1346 1347 gdp->gd_notify_types &= ops->notify_types; 1348 out: 1349 exp_put(exp); 1350 return nfserr; 1351 } 1352 1353 static void 1354 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u) 1355 { 1356 kfree(u->getdeviceinfo.gd_device); 1357 } 1358 1359 static __be32 1360 nfsd4_layoutget(struct svc_rqst *rqstp, 1361 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1362 { 1363 struct nfsd4_layoutget *lgp = &u->layoutget; 1364 struct svc_fh *current_fh = &cstate->current_fh; 1365 const struct nfsd4_layout_ops *ops; 1366 struct nfs4_layout_stateid *ls; 1367 __be32 nfserr; 1368 int accmode; 1369 1370 switch (lgp->lg_seg.iomode) { 1371 case IOMODE_READ: 1372 accmode = NFSD_MAY_READ; 1373 break; 1374 case IOMODE_RW: 1375 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE; 1376 break; 1377 default: 1378 dprintk("%s: invalid iomode %d\n", 1379 __func__, lgp->lg_seg.iomode); 1380 nfserr = nfserr_badiomode; 1381 goto out; 1382 } 1383 1384 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1385 if (nfserr) 1386 goto out; 1387 1388 nfserr = nfserr_layoutunavailable; 1389 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1390 if (!ops) 1391 goto out; 1392 1393 /* 1394 * Verify minlength and range as per RFC5661: 1395 * o If loga_length is less than loga_minlength, 1396 * the metadata server MUST return NFS4ERR_INVAL. 1397 * o If the sum of loga_offset and loga_minlength exceeds 1398 * NFS4_UINT64_MAX, and loga_minlength is not 1399 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1400 * o If the sum of loga_offset and loga_length exceeds 1401 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1402 * the error NFS4ERR_INVAL MUST result. 1403 */ 1404 nfserr = nfserr_inval; 1405 if (lgp->lg_seg.length < lgp->lg_minlength || 1406 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1407 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1408 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1409 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1410 goto out; 1411 if (lgp->lg_seg.length == 0) 1412 goto out; 1413 1414 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1415 true, lgp->lg_layout_type, &ls); 1416 if (nfserr) { 1417 trace_layout_get_lookup_fail(&lgp->lg_sid); 1418 goto out; 1419 } 1420 1421 nfserr = nfserr_recallconflict; 1422 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1423 goto out_put_stid; 1424 1425 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1426 current_fh, lgp); 1427 if (nfserr) 1428 goto out_put_stid; 1429 1430 nfserr = nfsd4_insert_layout(lgp, ls); 1431 1432 out_put_stid: 1433 mutex_unlock(&ls->ls_mutex); 1434 nfs4_put_stid(&ls->ls_stid); 1435 out: 1436 return nfserr; 1437 } 1438 1439 static void 1440 nfsd4_layoutget_release(union nfsd4_op_u *u) 1441 { 1442 kfree(u->layoutget.lg_content); 1443 } 1444 1445 static __be32 1446 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1447 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1448 { 1449 struct nfsd4_layoutcommit *lcp = &u->layoutcommit; 1450 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1451 struct svc_fh *current_fh = &cstate->current_fh; 1452 const struct nfsd4_layout_ops *ops; 1453 loff_t new_size = lcp->lc_last_wr + 1; 1454 struct inode *inode; 1455 struct nfs4_layout_stateid *ls; 1456 __be32 nfserr; 1457 1458 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 1459 if (nfserr) 1460 goto out; 1461 1462 nfserr = nfserr_layoutunavailable; 1463 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 1464 if (!ops) 1465 goto out; 1466 inode = d_inode(current_fh->fh_dentry); 1467 1468 nfserr = nfserr_inval; 1469 if (new_size <= seg->offset) { 1470 dprintk("pnfsd: last write before layout segment\n"); 1471 goto out; 1472 } 1473 if (new_size > seg->offset + seg->length) { 1474 dprintk("pnfsd: last write beyond layout segment\n"); 1475 goto out; 1476 } 1477 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 1478 dprintk("pnfsd: layoutcommit beyond EOF\n"); 1479 goto out; 1480 } 1481 1482 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 1483 false, lcp->lc_layout_type, 1484 &ls); 1485 if (nfserr) { 1486 trace_layout_commit_lookup_fail(&lcp->lc_sid); 1487 /* fixup error code as per RFC5661 */ 1488 if (nfserr == nfserr_bad_stateid) 1489 nfserr = nfserr_badlayout; 1490 goto out; 1491 } 1492 1493 /* LAYOUTCOMMIT does not require any serialization */ 1494 mutex_unlock(&ls->ls_mutex); 1495 1496 if (new_size > i_size_read(inode)) { 1497 lcp->lc_size_chg = 1; 1498 lcp->lc_newsize = new_size; 1499 } else { 1500 lcp->lc_size_chg = 0; 1501 } 1502 1503 nfserr = ops->proc_layoutcommit(inode, lcp); 1504 nfs4_put_stid(&ls->ls_stid); 1505 out: 1506 return nfserr; 1507 } 1508 1509 static __be32 1510 nfsd4_layoutreturn(struct svc_rqst *rqstp, 1511 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1512 { 1513 struct nfsd4_layoutreturn *lrp = &u->layoutreturn; 1514 struct svc_fh *current_fh = &cstate->current_fh; 1515 __be32 nfserr; 1516 1517 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 1518 if (nfserr) 1519 goto out; 1520 1521 nfserr = nfserr_layoutunavailable; 1522 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 1523 goto out; 1524 1525 switch (lrp->lr_seg.iomode) { 1526 case IOMODE_READ: 1527 case IOMODE_RW: 1528 case IOMODE_ANY: 1529 break; 1530 default: 1531 dprintk("%s: invalid iomode %d\n", __func__, 1532 lrp->lr_seg.iomode); 1533 nfserr = nfserr_inval; 1534 goto out; 1535 } 1536 1537 switch (lrp->lr_return_type) { 1538 case RETURN_FILE: 1539 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 1540 break; 1541 case RETURN_FSID: 1542 case RETURN_ALL: 1543 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 1544 break; 1545 default: 1546 dprintk("%s: invalid return_type %d\n", __func__, 1547 lrp->lr_return_type); 1548 nfserr = nfserr_inval; 1549 break; 1550 } 1551 out: 1552 return nfserr; 1553 } 1554 #endif /* CONFIG_NFSD_PNFS */ 1555 1556 /* 1557 * NULL call. 1558 */ 1559 static __be32 1560 nfsd4_proc_null(struct svc_rqst *rqstp) 1561 { 1562 return nfs_ok; 1563 } 1564 1565 static inline void nfsd4_increment_op_stats(u32 opnum) 1566 { 1567 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1568 nfsdstats.nfs4_opcount[opnum]++; 1569 } 1570 1571 static const struct nfsd4_operation nfsd4_ops[]; 1572 1573 static const char *nfsd4_op_name(unsigned opnum); 1574 1575 /* 1576 * Enforce NFSv4.1 COMPOUND ordering rules: 1577 * 1578 * Also note, enforced elsewhere: 1579 * - SEQUENCE other than as first op results in 1580 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1581 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1582 * (Enforced in nfsd4_bind_conn_to_session().) 1583 * - DESTROY_SESSION must be the final operation in a compound, if 1584 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1585 * (Enforced in nfsd4_destroy_session().) 1586 */ 1587 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1588 { 1589 struct nfsd4_op *op = &args->ops[0]; 1590 1591 /* These ordering requirements don't apply to NFSv4.0: */ 1592 if (args->minorversion == 0) 1593 return nfs_ok; 1594 /* This is weird, but OK, not our problem: */ 1595 if (args->opcnt == 0) 1596 return nfs_ok; 1597 if (op->status == nfserr_op_illegal) 1598 return nfs_ok; 1599 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1600 return nfserr_op_not_in_session; 1601 if (op->opnum == OP_SEQUENCE) 1602 return nfs_ok; 1603 if (args->opcnt != 1) 1604 return nfserr_not_only_op; 1605 return nfs_ok; 1606 } 1607 1608 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1609 { 1610 return &nfsd4_ops[op->opnum]; 1611 } 1612 1613 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1614 { 1615 if (op->opnum == OP_ILLEGAL) 1616 return false; 1617 return OPDESC(op)->op_flags & OP_CACHEME; 1618 } 1619 1620 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1621 { 1622 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1623 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1624 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1625 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1626 const struct nfsd4_operation *thisd = OPDESC(this); 1627 const struct nfsd4_operation *nextd; 1628 1629 /* 1630 * Most ops check wronsec on our own; only the putfh-like ops 1631 * have special rules. 1632 */ 1633 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1634 return false; 1635 /* 1636 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1637 * put-filehandle operation if we're not going to use the 1638 * result: 1639 */ 1640 if (argp->opcnt == resp->opcnt) 1641 return false; 1642 if (next->opnum == OP_ILLEGAL) 1643 return false; 1644 nextd = OPDESC(next); 1645 /* 1646 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1647 * errors themselves as necessary; others should check for them 1648 * now: 1649 */ 1650 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1651 } 1652 1653 static void svcxdr_init_encode(struct svc_rqst *rqstp, 1654 struct nfsd4_compoundres *resp) 1655 { 1656 struct xdr_stream *xdr = &resp->xdr; 1657 struct xdr_buf *buf = &rqstp->rq_res; 1658 struct kvec *head = buf->head; 1659 1660 xdr->buf = buf; 1661 xdr->iov = head; 1662 xdr->p = head->iov_base + head->iov_len; 1663 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1664 /* Tail and page_len should be zero at this point: */ 1665 buf->len = buf->head[0].iov_len; 1666 xdr->scratch.iov_len = 0; 1667 xdr->page_ptr = buf->pages - 1; 1668 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1669 - rqstp->rq_auth_slack; 1670 } 1671 1672 /* 1673 * COMPOUND call. 1674 */ 1675 static __be32 1676 nfsd4_proc_compound(struct svc_rqst *rqstp) 1677 { 1678 struct nfsd4_compoundargs *args = rqstp->rq_argp; 1679 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1680 struct nfsd4_op *op; 1681 struct nfsd4_compound_state *cstate = &resp->cstate; 1682 struct svc_fh *current_fh = &cstate->current_fh; 1683 struct svc_fh *save_fh = &cstate->save_fh; 1684 __be32 status; 1685 1686 svcxdr_init_encode(rqstp, resp); 1687 resp->tagp = resp->xdr.p; 1688 /* reserve space for: taglen, tag, and opcnt */ 1689 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1690 resp->taglen = args->taglen; 1691 resp->tag = args->tag; 1692 resp->rqstp = rqstp; 1693 cstate->minorversion = args->minorversion; 1694 fh_init(current_fh, NFS4_FHSIZE); 1695 fh_init(save_fh, NFS4_FHSIZE); 1696 /* 1697 * Don't use the deferral mechanism for NFSv4; compounds make it 1698 * too hard to avoid non-idempotency problems. 1699 */ 1700 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1701 1702 /* 1703 * According to RFC3010, this takes precedence over all other errors. 1704 */ 1705 status = nfserr_minor_vers_mismatch; 1706 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1707 goto out; 1708 1709 status = nfs41_check_op_ordering(args); 1710 if (status) { 1711 op = &args->ops[0]; 1712 op->status = status; 1713 goto encode_op; 1714 } 1715 1716 while (!status && resp->opcnt < args->opcnt) { 1717 op = &args->ops[resp->opcnt++]; 1718 1719 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1720 resp->opcnt, args->opcnt, op->opnum, 1721 nfsd4_op_name(op->opnum)); 1722 /* 1723 * The XDR decode routines may have pre-set op->status; 1724 * for example, if there is a miscellaneous XDR error 1725 * it will be set to nfserr_bad_xdr. 1726 */ 1727 if (op->status) { 1728 if (op->opnum == OP_OPEN) 1729 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1730 goto encode_op; 1731 } 1732 1733 if (!current_fh->fh_dentry) { 1734 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1735 op->status = nfserr_nofilehandle; 1736 goto encode_op; 1737 } 1738 } else if (current_fh->fh_export->ex_fslocs.migrated && 1739 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1740 op->status = nfserr_moved; 1741 goto encode_op; 1742 } 1743 1744 fh_clear_wcc(current_fh); 1745 1746 /* If op is non-idempotent */ 1747 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1748 /* 1749 * Don't execute this op if we couldn't encode a 1750 * succesful reply: 1751 */ 1752 u32 plen = op->opdesc->op_rsize_bop(rqstp, op); 1753 /* 1754 * Plus if there's another operation, make sure 1755 * we'll have space to at least encode an error: 1756 */ 1757 if (resp->opcnt < args->opcnt) 1758 plen += COMPOUND_ERR_SLACK_SPACE; 1759 op->status = nfsd4_check_resp_size(resp, plen); 1760 } 1761 1762 if (op->status) 1763 goto encode_op; 1764 1765 if (op->opdesc->op_get_currentstateid) 1766 op->opdesc->op_get_currentstateid(cstate, &op->u); 1767 op->status = op->opdesc->op_func(rqstp, cstate, &op->u); 1768 1769 /* Only from SEQUENCE */ 1770 if (cstate->status == nfserr_replay_cache) { 1771 dprintk("%s NFS4.1 replay from cache\n", __func__); 1772 status = op->status; 1773 goto out; 1774 } 1775 if (!op->status) { 1776 if (op->opdesc->op_set_currentstateid) 1777 op->opdesc->op_set_currentstateid(cstate, &op->u); 1778 1779 if (op->opdesc->op_flags & OP_CLEAR_STATEID) 1780 clear_current_stateid(cstate); 1781 1782 if (need_wrongsec_check(rqstp)) 1783 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 1784 } 1785 encode_op: 1786 if (op->status == nfserr_replay_me) { 1787 op->replay = &cstate->replay_owner->so_replay; 1788 nfsd4_encode_replay(&resp->xdr, op); 1789 status = op->status = op->replay->rp_status; 1790 } else { 1791 nfsd4_encode_operation(resp, op); 1792 status = op->status; 1793 } 1794 1795 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1796 args->ops, args->opcnt, resp->opcnt, op->opnum, 1797 be32_to_cpu(status)); 1798 1799 nfsd4_cstate_clear_replay(cstate); 1800 nfsd4_increment_op_stats(op->opnum); 1801 } 1802 1803 cstate->status = status; 1804 fh_put(current_fh); 1805 fh_put(save_fh); 1806 BUG_ON(cstate->replay_owner); 1807 out: 1808 /* Reset deferral mechanism for RPC deferrals */ 1809 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1810 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1811 return status; 1812 } 1813 1814 #define op_encode_hdr_size (2) 1815 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1816 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1817 #define op_encode_change_info_maxsz (5) 1818 #define nfs4_fattr_bitmap_maxsz (4) 1819 1820 /* We'll fall back on returning no lockowner if run out of space: */ 1821 #define op_encode_lockowner_maxsz (0) 1822 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1823 1824 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1825 1826 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1827 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1828 op_encode_ace_maxsz) 1829 1830 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1831 1832 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1833 { 1834 return (op_encode_hdr_size) * sizeof(__be32); 1835 } 1836 1837 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1838 { 1839 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1840 } 1841 1842 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1843 { 1844 /* ac_supported, ac_resp_access */ 1845 return (op_encode_hdr_size + 2)* sizeof(__be32); 1846 } 1847 1848 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1849 { 1850 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1851 } 1852 1853 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1854 { 1855 return (op_encode_hdr_size + op_encode_change_info_maxsz 1856 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1857 } 1858 1859 /* 1860 * Note since this is an idempotent operation we won't insist on failing 1861 * the op prematurely if the estimate is too large. We may turn off splice 1862 * reads unnecessarily. 1863 */ 1864 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1865 struct nfsd4_op *op) 1866 { 1867 u32 *bmap = op->u.getattr.ga_bmval; 1868 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1869 u32 ret = 0; 1870 1871 if (bmap0 & FATTR4_WORD0_ACL) 1872 return svc_max_payload(rqstp); 1873 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1874 return svc_max_payload(rqstp); 1875 1876 if (bmap1 & FATTR4_WORD1_OWNER) { 1877 ret += IDMAP_NAMESZ + 4; 1878 bmap1 &= ~FATTR4_WORD1_OWNER; 1879 } 1880 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1881 ret += IDMAP_NAMESZ + 4; 1882 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1883 } 1884 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1885 ret += NFS4_FHSIZE + 4; 1886 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1887 } 1888 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1889 ret += NFS4_MAXLABELLEN + 12; 1890 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1891 } 1892 /* 1893 * Largest of remaining attributes are 16 bytes (e.g., 1894 * supported_attributes) 1895 */ 1896 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1897 /* bitmask, length */ 1898 ret += 20; 1899 return ret; 1900 } 1901 1902 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1903 { 1904 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE; 1905 } 1906 1907 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1908 { 1909 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1910 * sizeof(__be32); 1911 } 1912 1913 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1914 { 1915 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1916 * sizeof(__be32); 1917 } 1918 1919 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1920 { 1921 return (op_encode_hdr_size + op_encode_stateid_maxsz 1922 + op_encode_change_info_maxsz + 1 1923 + nfs4_fattr_bitmap_maxsz 1924 + op_encode_delegation_maxsz) * sizeof(__be32); 1925 } 1926 1927 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1928 { 1929 u32 maxcount = 0, rlen = 0; 1930 1931 maxcount = svc_max_payload(rqstp); 1932 rlen = min(op->u.read.rd_length, maxcount); 1933 1934 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1935 } 1936 1937 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1938 { 1939 u32 maxcount = 0, rlen = 0; 1940 1941 maxcount = svc_max_payload(rqstp); 1942 rlen = min(op->u.readdir.rd_maxcount, maxcount); 1943 1944 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1945 XDR_QUADLEN(rlen)) * sizeof(__be32); 1946 } 1947 1948 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1949 { 1950 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE; 1951 } 1952 1953 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1954 { 1955 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1956 * sizeof(__be32); 1957 } 1958 1959 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1960 { 1961 return (op_encode_hdr_size + op_encode_change_info_maxsz 1962 + op_encode_change_info_maxsz) * sizeof(__be32); 1963 } 1964 1965 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1966 struct nfsd4_op *op) 1967 { 1968 return (op_encode_hdr_size 1969 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 1970 } 1971 1972 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1973 { 1974 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids) 1975 * sizeof(__be32); 1976 } 1977 1978 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1979 { 1980 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1981 } 1982 1983 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1984 { 1985 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR * 1986 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32); 1987 } 1988 1989 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1990 { 1991 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1992 sizeof(__be32); 1993 } 1994 1995 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1996 { 1997 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 1998 } 1999 2000 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2001 { 2002 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 2003 1 + 1 + /* eir_flags, spr_how */\ 2004 4 + /* spo_must_enforce & _allow with bitmap */\ 2005 2 + /*eir_server_owner.so_minor_id */\ 2006 /* eir_server_owner.so_major_id<> */\ 2007 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2008 /* eir_server_scope<> */\ 2009 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2010 1 + /* eir_server_impl_id array length */\ 2011 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 2012 } 2013 2014 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2015 { 2016 return (op_encode_hdr_size + \ 2017 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 2018 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 2019 } 2020 2021 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2022 { 2023 return (op_encode_hdr_size + \ 2024 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 2025 2 + /* csr_sequence, csr_flags */\ 2026 op_encode_channel_attrs_maxsz + \ 2027 op_encode_channel_attrs_maxsz) * sizeof(__be32); 2028 } 2029 2030 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2031 { 2032 return (op_encode_hdr_size + 2033 1 /* wr_callback */ + 2034 op_encode_stateid_maxsz /* wr_callback */ + 2035 2 /* wr_count */ + 2036 1 /* wr_committed */ + 2037 op_encode_verifier_maxsz + 2038 1 /* cr_consecutive */ + 2039 1 /* cr_synchronous */) * sizeof(__be32); 2040 } 2041 2042 #ifdef CONFIG_NFSD_PNFS 2043 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2044 { 2045 u32 maxcount = 0, rlen = 0; 2046 2047 maxcount = svc_max_payload(rqstp); 2048 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount); 2049 2050 return (op_encode_hdr_size + 2051 1 /* gd_layout_type*/ + 2052 XDR_QUADLEN(rlen) + 2053 2 /* gd_notify_types */) * sizeof(__be32); 2054 } 2055 2056 /* 2057 * At this stage we don't really know what layout driver will handle the request, 2058 * so we need to define an arbitrary upper bound here. 2059 */ 2060 #define MAX_LAYOUT_SIZE 128 2061 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2062 { 2063 return (op_encode_hdr_size + 2064 1 /* logr_return_on_close */ + 2065 op_encode_stateid_maxsz + 2066 1 /* nr of layouts */ + 2067 MAX_LAYOUT_SIZE) * sizeof(__be32); 2068 } 2069 2070 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2071 { 2072 return (op_encode_hdr_size + 2073 1 /* locr_newsize */ + 2074 2 /* ns_size */) * sizeof(__be32); 2075 } 2076 2077 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2078 { 2079 return (op_encode_hdr_size + 2080 1 /* lrs_stateid */ + 2081 op_encode_stateid_maxsz) * sizeof(__be32); 2082 } 2083 #endif /* CONFIG_NFSD_PNFS */ 2084 2085 2086 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2087 { 2088 return (op_encode_hdr_size + 3) * sizeof(__be32); 2089 } 2090 2091 static const struct nfsd4_operation nfsd4_ops[] = { 2092 [OP_ACCESS] = { 2093 .op_func = nfsd4_access, 2094 .op_name = "OP_ACCESS", 2095 .op_rsize_bop = nfsd4_access_rsize, 2096 }, 2097 [OP_CLOSE] = { 2098 .op_func = nfsd4_close, 2099 .op_flags = OP_MODIFIES_SOMETHING, 2100 .op_name = "OP_CLOSE", 2101 .op_rsize_bop = nfsd4_status_stateid_rsize, 2102 .op_get_currentstateid = nfsd4_get_closestateid, 2103 .op_set_currentstateid = nfsd4_set_closestateid, 2104 }, 2105 [OP_COMMIT] = { 2106 .op_func = nfsd4_commit, 2107 .op_flags = OP_MODIFIES_SOMETHING, 2108 .op_name = "OP_COMMIT", 2109 .op_rsize_bop = nfsd4_commit_rsize, 2110 }, 2111 [OP_CREATE] = { 2112 .op_func = nfsd4_create, 2113 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2114 .op_name = "OP_CREATE", 2115 .op_rsize_bop = nfsd4_create_rsize, 2116 }, 2117 [OP_DELEGRETURN] = { 2118 .op_func = nfsd4_delegreturn, 2119 .op_flags = OP_MODIFIES_SOMETHING, 2120 .op_name = "OP_DELEGRETURN", 2121 .op_rsize_bop = nfsd4_only_status_rsize, 2122 .op_get_currentstateid = nfsd4_get_delegreturnstateid, 2123 }, 2124 [OP_GETATTR] = { 2125 .op_func = nfsd4_getattr, 2126 .op_flags = ALLOWED_ON_ABSENT_FS, 2127 .op_rsize_bop = nfsd4_getattr_rsize, 2128 .op_name = "OP_GETATTR", 2129 }, 2130 [OP_GETFH] = { 2131 .op_func = nfsd4_getfh, 2132 .op_name = "OP_GETFH", 2133 .op_rsize_bop = nfsd4_getfh_rsize, 2134 }, 2135 [OP_LINK] = { 2136 .op_func = nfsd4_link, 2137 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2138 | OP_CACHEME, 2139 .op_name = "OP_LINK", 2140 .op_rsize_bop = nfsd4_link_rsize, 2141 }, 2142 [OP_LOCK] = { 2143 .op_func = nfsd4_lock, 2144 .op_flags = OP_MODIFIES_SOMETHING | 2145 OP_NONTRIVIAL_ERROR_ENCODE, 2146 .op_name = "OP_LOCK", 2147 .op_rsize_bop = nfsd4_lock_rsize, 2148 .op_set_currentstateid = nfsd4_set_lockstateid, 2149 }, 2150 [OP_LOCKT] = { 2151 .op_func = nfsd4_lockt, 2152 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE, 2153 .op_name = "OP_LOCKT", 2154 .op_rsize_bop = nfsd4_lock_rsize, 2155 }, 2156 [OP_LOCKU] = { 2157 .op_func = nfsd4_locku, 2158 .op_flags = OP_MODIFIES_SOMETHING, 2159 .op_name = "OP_LOCKU", 2160 .op_rsize_bop = nfsd4_status_stateid_rsize, 2161 .op_get_currentstateid = nfsd4_get_lockustateid, 2162 }, 2163 [OP_LOOKUP] = { 2164 .op_func = nfsd4_lookup, 2165 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2166 .op_name = "OP_LOOKUP", 2167 .op_rsize_bop = nfsd4_only_status_rsize, 2168 }, 2169 [OP_LOOKUPP] = { 2170 .op_func = nfsd4_lookupp, 2171 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2172 .op_name = "OP_LOOKUPP", 2173 .op_rsize_bop = nfsd4_only_status_rsize, 2174 }, 2175 [OP_NVERIFY] = { 2176 .op_func = nfsd4_nverify, 2177 .op_name = "OP_NVERIFY", 2178 .op_rsize_bop = nfsd4_only_status_rsize, 2179 }, 2180 [OP_OPEN] = { 2181 .op_func = nfsd4_open, 2182 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2183 .op_name = "OP_OPEN", 2184 .op_rsize_bop = nfsd4_open_rsize, 2185 .op_set_currentstateid = nfsd4_set_openstateid, 2186 }, 2187 [OP_OPEN_CONFIRM] = { 2188 .op_func = nfsd4_open_confirm, 2189 .op_flags = OP_MODIFIES_SOMETHING, 2190 .op_name = "OP_OPEN_CONFIRM", 2191 .op_rsize_bop = nfsd4_status_stateid_rsize, 2192 }, 2193 [OP_OPEN_DOWNGRADE] = { 2194 .op_func = nfsd4_open_downgrade, 2195 .op_flags = OP_MODIFIES_SOMETHING, 2196 .op_name = "OP_OPEN_DOWNGRADE", 2197 .op_rsize_bop = nfsd4_status_stateid_rsize, 2198 .op_get_currentstateid = nfsd4_get_opendowngradestateid, 2199 .op_set_currentstateid = nfsd4_set_opendowngradestateid, 2200 }, 2201 [OP_PUTFH] = { 2202 .op_func = nfsd4_putfh, 2203 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2204 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2205 .op_name = "OP_PUTFH", 2206 .op_rsize_bop = nfsd4_only_status_rsize, 2207 }, 2208 [OP_PUTPUBFH] = { 2209 .op_func = nfsd4_putrootfh, 2210 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2211 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2212 .op_name = "OP_PUTPUBFH", 2213 .op_rsize_bop = nfsd4_only_status_rsize, 2214 }, 2215 [OP_PUTROOTFH] = { 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_PUTROOTFH", 2220 .op_rsize_bop = nfsd4_only_status_rsize, 2221 }, 2222 [OP_READ] = { 2223 .op_func = nfsd4_read, 2224 .op_release = nfsd4_read_release, 2225 .op_name = "OP_READ", 2226 .op_rsize_bop = nfsd4_read_rsize, 2227 .op_get_currentstateid = nfsd4_get_readstateid, 2228 }, 2229 [OP_READDIR] = { 2230 .op_func = nfsd4_readdir, 2231 .op_name = "OP_READDIR", 2232 .op_rsize_bop = nfsd4_readdir_rsize, 2233 }, 2234 [OP_READLINK] = { 2235 .op_func = nfsd4_readlink, 2236 .op_name = "OP_READLINK", 2237 .op_rsize_bop = nfsd4_readlink_rsize, 2238 }, 2239 [OP_REMOVE] = { 2240 .op_func = nfsd4_remove, 2241 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2242 .op_name = "OP_REMOVE", 2243 .op_rsize_bop = nfsd4_remove_rsize, 2244 }, 2245 [OP_RENAME] = { 2246 .op_func = nfsd4_rename, 2247 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2248 .op_name = "OP_RENAME", 2249 .op_rsize_bop = nfsd4_rename_rsize, 2250 }, 2251 [OP_RENEW] = { 2252 .op_func = nfsd4_renew, 2253 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2254 | OP_MODIFIES_SOMETHING, 2255 .op_name = "OP_RENEW", 2256 .op_rsize_bop = nfsd4_only_status_rsize, 2257 2258 }, 2259 [OP_RESTOREFH] = { 2260 .op_func = nfsd4_restorefh, 2261 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2262 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2263 .op_name = "OP_RESTOREFH", 2264 .op_rsize_bop = nfsd4_only_status_rsize, 2265 }, 2266 [OP_SAVEFH] = { 2267 .op_func = nfsd4_savefh, 2268 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2269 .op_name = "OP_SAVEFH", 2270 .op_rsize_bop = nfsd4_only_status_rsize, 2271 }, 2272 [OP_SECINFO] = { 2273 .op_func = nfsd4_secinfo, 2274 .op_release = nfsd4_secinfo_release, 2275 .op_flags = OP_HANDLES_WRONGSEC, 2276 .op_name = "OP_SECINFO", 2277 .op_rsize_bop = nfsd4_secinfo_rsize, 2278 }, 2279 [OP_SETATTR] = { 2280 .op_func = nfsd4_setattr, 2281 .op_name = "OP_SETATTR", 2282 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME 2283 | OP_NONTRIVIAL_ERROR_ENCODE, 2284 .op_rsize_bop = nfsd4_setattr_rsize, 2285 .op_get_currentstateid = nfsd4_get_setattrstateid, 2286 }, 2287 [OP_SETCLIENTID] = { 2288 .op_func = nfsd4_setclientid, 2289 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2290 | OP_MODIFIES_SOMETHING | OP_CACHEME 2291 | OP_NONTRIVIAL_ERROR_ENCODE, 2292 .op_name = "OP_SETCLIENTID", 2293 .op_rsize_bop = nfsd4_setclientid_rsize, 2294 }, 2295 [OP_SETCLIENTID_CONFIRM] = { 2296 .op_func = nfsd4_setclientid_confirm, 2297 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2298 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2299 .op_name = "OP_SETCLIENTID_CONFIRM", 2300 .op_rsize_bop = nfsd4_only_status_rsize, 2301 }, 2302 [OP_VERIFY] = { 2303 .op_func = nfsd4_verify, 2304 .op_name = "OP_VERIFY", 2305 .op_rsize_bop = nfsd4_only_status_rsize, 2306 }, 2307 [OP_WRITE] = { 2308 .op_func = nfsd4_write, 2309 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2310 .op_name = "OP_WRITE", 2311 .op_rsize_bop = nfsd4_write_rsize, 2312 .op_get_currentstateid = nfsd4_get_writestateid, 2313 }, 2314 [OP_RELEASE_LOCKOWNER] = { 2315 .op_func = nfsd4_release_lockowner, 2316 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2317 | OP_MODIFIES_SOMETHING, 2318 .op_name = "OP_RELEASE_LOCKOWNER", 2319 .op_rsize_bop = nfsd4_only_status_rsize, 2320 }, 2321 2322 /* NFSv4.1 operations */ 2323 [OP_EXCHANGE_ID] = { 2324 .op_func = nfsd4_exchange_id, 2325 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2326 | OP_MODIFIES_SOMETHING, 2327 .op_name = "OP_EXCHANGE_ID", 2328 .op_rsize_bop = nfsd4_exchange_id_rsize, 2329 }, 2330 [OP_BACKCHANNEL_CTL] = { 2331 .op_func = nfsd4_backchannel_ctl, 2332 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2333 .op_name = "OP_BACKCHANNEL_CTL", 2334 .op_rsize_bop = nfsd4_only_status_rsize, 2335 }, 2336 [OP_BIND_CONN_TO_SESSION] = { 2337 .op_func = nfsd4_bind_conn_to_session, 2338 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2339 | OP_MODIFIES_SOMETHING, 2340 .op_name = "OP_BIND_CONN_TO_SESSION", 2341 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize, 2342 }, 2343 [OP_CREATE_SESSION] = { 2344 .op_func = nfsd4_create_session, 2345 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2346 | OP_MODIFIES_SOMETHING, 2347 .op_name = "OP_CREATE_SESSION", 2348 .op_rsize_bop = nfsd4_create_session_rsize, 2349 }, 2350 [OP_DESTROY_SESSION] = { 2351 .op_func = nfsd4_destroy_session, 2352 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2353 | OP_MODIFIES_SOMETHING, 2354 .op_name = "OP_DESTROY_SESSION", 2355 .op_rsize_bop = nfsd4_only_status_rsize, 2356 }, 2357 [OP_SEQUENCE] = { 2358 .op_func = nfsd4_sequence, 2359 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 2360 .op_name = "OP_SEQUENCE", 2361 .op_rsize_bop = nfsd4_sequence_rsize, 2362 }, 2363 [OP_DESTROY_CLIENTID] = { 2364 .op_func = nfsd4_destroy_clientid, 2365 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2366 | OP_MODIFIES_SOMETHING, 2367 .op_name = "OP_DESTROY_CLIENTID", 2368 .op_rsize_bop = nfsd4_only_status_rsize, 2369 }, 2370 [OP_RECLAIM_COMPLETE] = { 2371 .op_func = nfsd4_reclaim_complete, 2372 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2373 .op_name = "OP_RECLAIM_COMPLETE", 2374 .op_rsize_bop = nfsd4_only_status_rsize, 2375 }, 2376 [OP_SECINFO_NO_NAME] = { 2377 .op_func = nfsd4_secinfo_no_name, 2378 .op_release = nfsd4_secinfo_release, 2379 .op_flags = OP_HANDLES_WRONGSEC, 2380 .op_name = "OP_SECINFO_NO_NAME", 2381 .op_rsize_bop = nfsd4_secinfo_rsize, 2382 }, 2383 [OP_TEST_STATEID] = { 2384 .op_func = nfsd4_test_stateid, 2385 .op_flags = ALLOWED_WITHOUT_FH, 2386 .op_name = "OP_TEST_STATEID", 2387 .op_rsize_bop = nfsd4_test_stateid_rsize, 2388 }, 2389 [OP_FREE_STATEID] = { 2390 .op_func = nfsd4_free_stateid, 2391 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2392 .op_name = "OP_FREE_STATEID", 2393 .op_get_currentstateid = nfsd4_get_freestateid, 2394 .op_rsize_bop = nfsd4_only_status_rsize, 2395 }, 2396 #ifdef CONFIG_NFSD_PNFS 2397 [OP_GETDEVICEINFO] = { 2398 .op_func = nfsd4_getdeviceinfo, 2399 .op_release = nfsd4_getdeviceinfo_release, 2400 .op_flags = ALLOWED_WITHOUT_FH, 2401 .op_name = "OP_GETDEVICEINFO", 2402 .op_rsize_bop = nfsd4_getdeviceinfo_rsize, 2403 }, 2404 [OP_LAYOUTGET] = { 2405 .op_func = nfsd4_layoutget, 2406 .op_release = nfsd4_layoutget_release, 2407 .op_flags = OP_MODIFIES_SOMETHING, 2408 .op_name = "OP_LAYOUTGET", 2409 .op_rsize_bop = nfsd4_layoutget_rsize, 2410 }, 2411 [OP_LAYOUTCOMMIT] = { 2412 .op_func = nfsd4_layoutcommit, 2413 .op_flags = OP_MODIFIES_SOMETHING, 2414 .op_name = "OP_LAYOUTCOMMIT", 2415 .op_rsize_bop = nfsd4_layoutcommit_rsize, 2416 }, 2417 [OP_LAYOUTRETURN] = { 2418 .op_func = nfsd4_layoutreturn, 2419 .op_flags = OP_MODIFIES_SOMETHING, 2420 .op_name = "OP_LAYOUTRETURN", 2421 .op_rsize_bop = nfsd4_layoutreturn_rsize, 2422 }, 2423 #endif /* CONFIG_NFSD_PNFS */ 2424 2425 /* NFSv4.2 operations */ 2426 [OP_ALLOCATE] = { 2427 .op_func = nfsd4_allocate, 2428 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2429 .op_name = "OP_ALLOCATE", 2430 .op_rsize_bop = nfsd4_only_status_rsize, 2431 }, 2432 [OP_DEALLOCATE] = { 2433 .op_func = nfsd4_deallocate, 2434 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2435 .op_name = "OP_DEALLOCATE", 2436 .op_rsize_bop = nfsd4_only_status_rsize, 2437 }, 2438 [OP_CLONE] = { 2439 .op_func = nfsd4_clone, 2440 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2441 .op_name = "OP_CLONE", 2442 .op_rsize_bop = nfsd4_only_status_rsize, 2443 }, 2444 [OP_COPY] = { 2445 .op_func = nfsd4_copy, 2446 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2447 .op_name = "OP_COPY", 2448 .op_rsize_bop = nfsd4_copy_rsize, 2449 }, 2450 [OP_SEEK] = { 2451 .op_func = nfsd4_seek, 2452 .op_name = "OP_SEEK", 2453 .op_rsize_bop = nfsd4_seek_rsize, 2454 }, 2455 }; 2456 2457 /** 2458 * nfsd4_spo_must_allow - Determine if the compound op contains an 2459 * operation that is allowed to be sent with machine credentials 2460 * 2461 * @rqstp: a pointer to the struct svc_rqst 2462 * 2463 * Checks to see if the compound contains a spo_must_allow op 2464 * and confirms that it was sent with the proper machine creds. 2465 */ 2466 2467 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 2468 { 2469 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2470 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2471 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2472 struct nfsd4_compound_state *cstate = &resp->cstate; 2473 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 2474 u32 opiter; 2475 2476 if (!cstate->minorversion) 2477 return false; 2478 2479 if (cstate->spo_must_allowed == true) 2480 return true; 2481 2482 opiter = resp->opcnt; 2483 while (opiter < argp->opcnt) { 2484 this = &argp->ops[opiter++]; 2485 if (test_bit(this->opnum, allow->u.longs) && 2486 cstate->clp->cl_mach_cred && 2487 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 2488 cstate->spo_must_allowed = true; 2489 return true; 2490 } 2491 } 2492 cstate->spo_must_allowed = false; 2493 return false; 2494 } 2495 2496 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 2497 { 2498 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp) 2499 return op_encode_hdr_size * sizeof(__be32); 2500 2501 BUG_ON(OPDESC(op)->op_rsize_bop == NULL); 2502 return OPDESC(op)->op_rsize_bop(rqstp, op); 2503 } 2504 2505 void warn_on_nonidempotent_op(struct nfsd4_op *op) 2506 { 2507 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 2508 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 2509 op->opnum, nfsd4_op_name(op->opnum)); 2510 WARN_ON_ONCE(1); 2511 } 2512 } 2513 2514 static const char *nfsd4_op_name(unsigned opnum) 2515 { 2516 if (opnum < ARRAY_SIZE(nfsd4_ops)) 2517 return nfsd4_ops[opnum].op_name; 2518 return "unknown_operation"; 2519 } 2520 2521 #define nfsd4_voidres nfsd4_voidargs 2522 struct nfsd4_voidargs { int dummy; }; 2523 2524 static const struct svc_procedure nfsd_procedures4[2] = { 2525 [NFSPROC4_NULL] = { 2526 .pc_func = nfsd4_proc_null, 2527 .pc_encode = nfs4svc_encode_voidres, 2528 .pc_argsize = sizeof(struct nfsd4_voidargs), 2529 .pc_ressize = sizeof(struct nfsd4_voidres), 2530 .pc_cachetype = RC_NOCACHE, 2531 .pc_xdrressize = 1, 2532 }, 2533 [NFSPROC4_COMPOUND] = { 2534 .pc_func = nfsd4_proc_compound, 2535 .pc_decode = nfs4svc_decode_compoundargs, 2536 .pc_encode = nfs4svc_encode_compoundres, 2537 .pc_argsize = sizeof(struct nfsd4_compoundargs), 2538 .pc_ressize = sizeof(struct nfsd4_compoundres), 2539 .pc_release = nfsd4_release_compoundargs, 2540 .pc_cachetype = RC_NOCACHE, 2541 .pc_xdrressize = NFSD_BUFSIZE/4, 2542 }, 2543 }; 2544 2545 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)]; 2546 const struct svc_version nfsd_version4 = { 2547 .vs_vers = 4, 2548 .vs_nproc = 2, 2549 .vs_proc = nfsd_procedures4, 2550 .vs_count = nfsd_count3, 2551 .vs_dispatch = nfsd_dispatch, 2552 .vs_xdrsize = NFS4_SVC_XDRSIZE, 2553 .vs_rpcb_optnl = true, 2554 .vs_need_cong_ctrl = true, 2555 }; 2556 2557 /* 2558 * Local variables: 2559 * c-basic-offset: 8 2560 * End: 2561 */ 2562