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 struct nfsd4_open *open) 348 { 349 __be32 status; 350 struct svc_fh *resfh = NULL; 351 struct net *net = SVC_NET(rqstp); 352 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 353 354 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 355 (int)open->op_fname.len, open->op_fname.data, 356 open->op_openowner); 357 358 /* This check required by spec. */ 359 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 360 return nfserr_inval; 361 362 open->op_created = 0; 363 /* 364 * RFC5661 18.51.3 365 * Before RECLAIM_COMPLETE done, server should deny new lock 366 */ 367 if (nfsd4_has_session(cstate) && 368 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 369 &cstate->session->se_client->cl_flags) && 370 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 371 return nfserr_grace; 372 373 if (nfsd4_has_session(cstate)) 374 copy_clientid(&open->op_clientid, cstate->session); 375 376 /* check seqid for replay. set nfs4_owner */ 377 status = nfsd4_process_open1(cstate, open, nn); 378 if (status == nfserr_replay_me) { 379 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 380 fh_put(&cstate->current_fh); 381 fh_copy_shallow(&cstate->current_fh.fh_handle, 382 &rp->rp_openfh); 383 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 384 if (status) 385 dprintk("nfsd4_open: replay failed" 386 " restoring previous filehandle\n"); 387 else 388 status = nfserr_replay_me; 389 } 390 if (status) 391 goto out; 392 if (open->op_xdr_error) { 393 status = open->op_xdr_error; 394 goto out; 395 } 396 397 status = nfsd4_check_open_attributes(rqstp, cstate, open); 398 if (status) 399 goto out; 400 401 /* Openowner is now set, so sequence id will get bumped. Now we need 402 * these checks before we do any creates: */ 403 status = nfserr_grace; 404 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 405 goto out; 406 status = nfserr_no_grace; 407 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 408 goto out; 409 410 switch (open->op_claim_type) { 411 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 412 case NFS4_OPEN_CLAIM_NULL: 413 status = do_open_lookup(rqstp, cstate, open, &resfh); 414 if (status) 415 goto out; 416 break; 417 case NFS4_OPEN_CLAIM_PREVIOUS: 418 status = nfs4_check_open_reclaim(&open->op_clientid, 419 cstate, nn); 420 if (status) 421 goto out; 422 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 423 case NFS4_OPEN_CLAIM_FH: 424 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 425 status = do_open_fhandle(rqstp, cstate, open); 426 if (status) 427 goto out; 428 resfh = &cstate->current_fh; 429 break; 430 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 431 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 432 dprintk("NFSD: unsupported OPEN claim type %d\n", 433 open->op_claim_type); 434 status = nfserr_notsupp; 435 goto out; 436 default: 437 dprintk("NFSD: Invalid OPEN claim type %d\n", 438 open->op_claim_type); 439 status = nfserr_inval; 440 goto out; 441 } 442 /* 443 * nfsd4_process_open2() does the actual opening of the file. If 444 * successful, it (1) truncates the file if open->op_truncate was 445 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 446 */ 447 status = nfsd4_process_open2(rqstp, resfh, open); 448 WARN(status && open->op_created, 449 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 450 be32_to_cpu(status)); 451 out: 452 if (resfh && resfh != &cstate->current_fh) { 453 fh_dup2(&cstate->current_fh, resfh); 454 fh_put(resfh); 455 kfree(resfh); 456 } 457 nfsd4_cleanup_open_state(cstate, open); 458 nfsd4_bump_seqid(cstate, status); 459 return status; 460 } 461 462 /* 463 * OPEN is the only seqid-mutating operation whose decoding can fail 464 * with a seqid-mutating error (specifically, decoding of user names in 465 * the attributes). Therefore we have to do some processing to look up 466 * the stateowner so that we can bump the seqid. 467 */ 468 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 469 { 470 struct nfsd4_open *open = (struct nfsd4_open *)&op->u; 471 472 if (!seqid_mutating_err(ntohl(op->status))) 473 return op->status; 474 if (nfsd4_has_session(cstate)) 475 return op->status; 476 open->op_xdr_error = op->status; 477 return nfsd4_open(rqstp, cstate, open); 478 } 479 480 /* 481 * filehandle-manipulating ops. 482 */ 483 static __be32 484 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 485 struct svc_fh **getfh) 486 { 487 if (!cstate->current_fh.fh_dentry) 488 return nfserr_nofilehandle; 489 490 *getfh = &cstate->current_fh; 491 return nfs_ok; 492 } 493 494 static __be32 495 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 496 struct nfsd4_putfh *putfh) 497 { 498 fh_put(&cstate->current_fh); 499 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 500 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 501 putfh->pf_fhlen); 502 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 503 } 504 505 static __be32 506 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 507 void *arg) 508 { 509 __be32 status; 510 511 fh_put(&cstate->current_fh); 512 status = exp_pseudoroot(rqstp, &cstate->current_fh); 513 return status; 514 } 515 516 static __be32 517 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 518 void *arg) 519 { 520 if (!cstate->save_fh.fh_dentry) 521 return nfserr_restorefh; 522 523 fh_dup2(&cstate->current_fh, &cstate->save_fh); 524 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 525 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 526 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 527 } 528 return nfs_ok; 529 } 530 531 static __be32 532 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 533 void *arg) 534 { 535 if (!cstate->current_fh.fh_dentry) 536 return nfserr_nofilehandle; 537 538 fh_dup2(&cstate->save_fh, &cstate->current_fh); 539 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 540 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 541 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 542 } 543 return nfs_ok; 544 } 545 546 /* 547 * misc nfsv4 ops 548 */ 549 static __be32 550 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 551 struct nfsd4_access *access) 552 { 553 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 554 return nfserr_inval; 555 556 access->ac_resp_access = access->ac_req_access; 557 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 558 &access->ac_supported); 559 } 560 561 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 562 { 563 __be32 verf[2]; 564 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 565 566 /* 567 * This is opaque to client, so no need to byte-swap. Use 568 * __force to keep sparse happy 569 */ 570 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec; 571 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec; 572 memcpy(verifier->data, verf, sizeof(verifier->data)); 573 } 574 575 static __be32 576 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 577 struct nfsd4_commit *commit) 578 { 579 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 580 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 581 commit->co_count); 582 } 583 584 static __be32 585 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 586 struct nfsd4_create *create) 587 { 588 struct svc_fh resfh; 589 __be32 status; 590 dev_t rdev; 591 592 fh_init(&resfh, NFS4_FHSIZE); 593 594 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP); 595 if (status) 596 return status; 597 598 status = check_attr_support(rqstp, cstate, create->cr_bmval, 599 nfsd_attrmask); 600 if (status) 601 return status; 602 603 switch (create->cr_type) { 604 case NF4LNK: 605 status = nfsd_symlink(rqstp, &cstate->current_fh, 606 create->cr_name, create->cr_namelen, 607 create->cr_data, &resfh); 608 break; 609 610 case NF4BLK: 611 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 612 if (MAJOR(rdev) != create->cr_specdata1 || 613 MINOR(rdev) != create->cr_specdata2) 614 return nfserr_inval; 615 status = nfsd_create(rqstp, &cstate->current_fh, 616 create->cr_name, create->cr_namelen, 617 &create->cr_iattr, S_IFBLK, rdev, &resfh); 618 break; 619 620 case NF4CHR: 621 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 622 if (MAJOR(rdev) != create->cr_specdata1 || 623 MINOR(rdev) != create->cr_specdata2) 624 return nfserr_inval; 625 status = nfsd_create(rqstp, &cstate->current_fh, 626 create->cr_name, create->cr_namelen, 627 &create->cr_iattr,S_IFCHR, rdev, &resfh); 628 break; 629 630 case NF4SOCK: 631 status = nfsd_create(rqstp, &cstate->current_fh, 632 create->cr_name, create->cr_namelen, 633 &create->cr_iattr, S_IFSOCK, 0, &resfh); 634 break; 635 636 case NF4FIFO: 637 status = nfsd_create(rqstp, &cstate->current_fh, 638 create->cr_name, create->cr_namelen, 639 &create->cr_iattr, S_IFIFO, 0, &resfh); 640 break; 641 642 case NF4DIR: 643 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 644 status = nfsd_create(rqstp, &cstate->current_fh, 645 create->cr_name, create->cr_namelen, 646 &create->cr_iattr, S_IFDIR, 0, &resfh); 647 break; 648 649 default: 650 status = nfserr_badtype; 651 } 652 653 if (status) 654 goto out; 655 656 if (create->cr_label.len) 657 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 658 659 if (create->cr_acl != NULL) 660 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 661 create->cr_bmval); 662 663 fh_unlock(&cstate->current_fh); 664 set_change_info(&create->cr_cinfo, &cstate->current_fh); 665 fh_dup2(&cstate->current_fh, &resfh); 666 out: 667 fh_put(&resfh); 668 return status; 669 } 670 671 static __be32 672 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 673 struct nfsd4_getattr *getattr) 674 { 675 __be32 status; 676 677 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 678 if (status) 679 return status; 680 681 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 682 return nfserr_inval; 683 684 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 685 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 686 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 687 688 getattr->ga_fhp = &cstate->current_fh; 689 return nfs_ok; 690 } 691 692 static __be32 693 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 694 struct nfsd4_link *link) 695 { 696 __be32 status = nfserr_nofilehandle; 697 698 if (!cstate->save_fh.fh_dentry) 699 return status; 700 status = nfsd_link(rqstp, &cstate->current_fh, 701 link->li_name, link->li_namelen, &cstate->save_fh); 702 if (!status) 703 set_change_info(&link->li_cinfo, &cstate->current_fh); 704 return status; 705 } 706 707 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 708 { 709 struct svc_fh tmp_fh; 710 __be32 ret; 711 712 fh_init(&tmp_fh, NFS4_FHSIZE); 713 ret = exp_pseudoroot(rqstp, &tmp_fh); 714 if (ret) 715 return ret; 716 if (tmp_fh.fh_dentry == fh->fh_dentry) { 717 fh_put(&tmp_fh); 718 return nfserr_noent; 719 } 720 fh_put(&tmp_fh); 721 return nfsd_lookup(rqstp, fh, "..", 2, fh); 722 } 723 724 static __be32 725 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 726 void *arg) 727 { 728 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 729 } 730 731 static __be32 732 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 733 struct nfsd4_lookup *lookup) 734 { 735 return nfsd_lookup(rqstp, &cstate->current_fh, 736 lookup->lo_name, lookup->lo_len, 737 &cstate->current_fh); 738 } 739 740 static __be32 741 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 742 struct nfsd4_read *read) 743 { 744 __be32 status; 745 746 read->rd_filp = NULL; 747 if (read->rd_offset >= OFFSET_MAX) 748 return nfserr_inval; 749 750 /* 751 * If we do a zero copy read, then a client will see read data 752 * that reflects the state of the file *after* performing the 753 * following compound. 754 * 755 * To ensure proper ordering, we therefore turn off zero copy if 756 * the client wants us to do more in this compound: 757 */ 758 if (!nfsd4_last_compound_op(rqstp)) 759 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 760 761 /* check stateid */ 762 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 763 &read->rd_stateid, RD_STATE, 764 &read->rd_filp, &read->rd_tmp_file); 765 if (status) { 766 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 767 goto out; 768 } 769 status = nfs_ok; 770 out: 771 read->rd_rqstp = rqstp; 772 read->rd_fhp = &cstate->current_fh; 773 return status; 774 } 775 776 static __be32 777 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 778 struct nfsd4_readdir *readdir) 779 { 780 u64 cookie = readdir->rd_cookie; 781 static const nfs4_verifier zeroverf; 782 783 /* no need to check permission - this will be done in nfsd_readdir() */ 784 785 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 786 return nfserr_inval; 787 788 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 789 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 790 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 791 792 if ((cookie == 1) || (cookie == 2) || 793 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 794 return nfserr_bad_cookie; 795 796 readdir->rd_rqstp = rqstp; 797 readdir->rd_fhp = &cstate->current_fh; 798 return nfs_ok; 799 } 800 801 static __be32 802 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 803 struct nfsd4_readlink *readlink) 804 { 805 readlink->rl_rqstp = rqstp; 806 readlink->rl_fhp = &cstate->current_fh; 807 return nfs_ok; 808 } 809 810 static __be32 811 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 812 struct nfsd4_remove *remove) 813 { 814 __be32 status; 815 816 if (opens_in_grace(SVC_NET(rqstp))) 817 return nfserr_grace; 818 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 819 remove->rm_name, remove->rm_namelen); 820 if (!status) { 821 fh_unlock(&cstate->current_fh); 822 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 823 } 824 return status; 825 } 826 827 static __be32 828 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 829 struct nfsd4_rename *rename) 830 { 831 __be32 status = nfserr_nofilehandle; 832 833 if (!cstate->save_fh.fh_dentry) 834 return status; 835 if (opens_in_grace(SVC_NET(rqstp)) && 836 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 837 return nfserr_grace; 838 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 839 rename->rn_snamelen, &cstate->current_fh, 840 rename->rn_tname, rename->rn_tnamelen); 841 if (status) 842 return status; 843 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 844 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 845 return nfs_ok; 846 } 847 848 static __be32 849 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 850 struct nfsd4_secinfo *secinfo) 851 { 852 struct svc_export *exp; 853 struct dentry *dentry; 854 __be32 err; 855 856 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 857 if (err) 858 return err; 859 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 860 secinfo->si_name, secinfo->si_namelen, 861 &exp, &dentry); 862 if (err) 863 return err; 864 fh_unlock(&cstate->current_fh); 865 if (d_really_is_negative(dentry)) { 866 exp_put(exp); 867 err = nfserr_noent; 868 } else 869 secinfo->si_exp = exp; 870 dput(dentry); 871 if (cstate->minorversion) 872 /* See rfc 5661 section 2.6.3.1.1.8 */ 873 fh_put(&cstate->current_fh); 874 return err; 875 } 876 877 static __be32 878 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 879 struct nfsd4_secinfo_no_name *sin) 880 { 881 __be32 err; 882 883 switch (sin->sin_style) { 884 case NFS4_SECINFO_STYLE4_CURRENT_FH: 885 break; 886 case NFS4_SECINFO_STYLE4_PARENT: 887 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 888 if (err) 889 return err; 890 break; 891 default: 892 return nfserr_inval; 893 } 894 895 sin->sin_exp = exp_get(cstate->current_fh.fh_export); 896 fh_put(&cstate->current_fh); 897 return nfs_ok; 898 } 899 900 static __be32 901 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 902 struct nfsd4_setattr *setattr) 903 { 904 __be32 status = nfs_ok; 905 int err; 906 907 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 908 status = nfs4_preprocess_stateid_op(rqstp, cstate, 909 &cstate->current_fh, &setattr->sa_stateid, 910 WR_STATE, NULL, NULL); 911 if (status) { 912 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 913 return status; 914 } 915 } 916 err = fh_want_write(&cstate->current_fh); 917 if (err) 918 return nfserrno(err); 919 status = nfs_ok; 920 921 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 922 nfsd_attrmask); 923 if (status) 924 goto out; 925 926 if (setattr->sa_acl != NULL) 927 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 928 setattr->sa_acl); 929 if (status) 930 goto out; 931 if (setattr->sa_label.len) 932 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 933 &setattr->sa_label); 934 if (status) 935 goto out; 936 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 937 0, (time_t)0); 938 out: 939 fh_drop_write(&cstate->current_fh); 940 return status; 941 } 942 943 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 944 { 945 int i = 1; 946 int buflen = write->wr_buflen; 947 948 vec[0].iov_base = write->wr_head.iov_base; 949 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 950 buflen -= vec[0].iov_len; 951 952 while (buflen) { 953 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 954 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 955 buflen -= vec[i].iov_len; 956 i++; 957 } 958 return i; 959 } 960 961 static __be32 962 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 963 struct nfsd4_write *write) 964 { 965 stateid_t *stateid = &write->wr_stateid; 966 struct file *filp = NULL; 967 __be32 status = nfs_ok; 968 unsigned long cnt; 969 int nvecs; 970 971 if (write->wr_offset >= OFFSET_MAX) 972 return nfserr_inval; 973 974 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 975 stateid, WR_STATE, &filp, NULL); 976 if (status) { 977 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 978 return status; 979 } 980 981 cnt = write->wr_buflen; 982 write->wr_how_written = write->wr_stable_how; 983 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 984 985 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 986 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 987 988 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp, 989 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 990 write->wr_how_written); 991 fput(filp); 992 993 write->wr_bytes_written = cnt; 994 995 return status; 996 } 997 998 static __be32 999 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1000 stateid_t *src_stateid, struct file **src, 1001 stateid_t *dst_stateid, struct file **dst) 1002 { 1003 __be32 status; 1004 1005 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, 1006 src_stateid, RD_STATE, src, NULL); 1007 if (status) { 1008 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); 1009 goto out; 1010 } 1011 1012 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1013 dst_stateid, WR_STATE, dst, NULL); 1014 if (status) { 1015 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); 1016 goto out_put_src; 1017 } 1018 1019 /* fix up for NFS-specific error code */ 1020 if (!S_ISREG(file_inode(*src)->i_mode) || 1021 !S_ISREG(file_inode(*dst)->i_mode)) { 1022 status = nfserr_wrong_type; 1023 goto out_put_dst; 1024 } 1025 1026 out: 1027 return status; 1028 out_put_dst: 1029 fput(*dst); 1030 out_put_src: 1031 fput(*src); 1032 goto out; 1033 } 1034 1035 static __be32 1036 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1037 struct nfsd4_clone *clone) 1038 { 1039 struct file *src, *dst; 1040 __be32 status; 1041 1042 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src, 1043 &clone->cl_dst_stateid, &dst); 1044 if (status) 1045 goto out; 1046 1047 status = nfsd4_clone_file_range(src, clone->cl_src_pos, 1048 dst, clone->cl_dst_pos, clone->cl_count); 1049 1050 fput(dst); 1051 fput(src); 1052 out: 1053 return status; 1054 } 1055 1056 static __be32 1057 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1058 struct nfsd4_copy *copy) 1059 { 1060 struct file *src, *dst; 1061 __be32 status; 1062 ssize_t bytes; 1063 1064 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, &src, 1065 ©->cp_dst_stateid, &dst); 1066 if (status) 1067 goto out; 1068 1069 bytes = nfsd_copy_file_range(src, copy->cp_src_pos, 1070 dst, copy->cp_dst_pos, copy->cp_count); 1071 1072 if (bytes < 0) 1073 status = nfserrno(bytes); 1074 else { 1075 copy->cp_res.wr_bytes_written = bytes; 1076 copy->cp_res.wr_stable_how = NFS_UNSTABLE; 1077 copy->cp_consecutive = 1; 1078 copy->cp_synchronous = 1; 1079 gen_boot_verifier(©->cp_res.wr_verifier, SVC_NET(rqstp)); 1080 status = nfs_ok; 1081 } 1082 1083 fput(src); 1084 fput(dst); 1085 out: 1086 return status; 1087 } 1088 1089 static __be32 1090 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1091 struct nfsd4_fallocate *fallocate, int flags) 1092 { 1093 __be32 status = nfserr_notsupp; 1094 struct file *file; 1095 1096 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1097 &fallocate->falloc_stateid, 1098 WR_STATE, &file, NULL); 1099 if (status != nfs_ok) { 1100 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1101 return status; 1102 } 1103 1104 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file, 1105 fallocate->falloc_offset, 1106 fallocate->falloc_length, 1107 flags); 1108 fput(file); 1109 return status; 1110 } 1111 1112 static __be32 1113 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1114 struct nfsd4_fallocate *fallocate) 1115 { 1116 return nfsd4_fallocate(rqstp, cstate, fallocate, 0); 1117 } 1118 1119 static __be32 1120 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1121 struct nfsd4_fallocate *fallocate) 1122 { 1123 return nfsd4_fallocate(rqstp, cstate, fallocate, 1124 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1125 } 1126 1127 static __be32 1128 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1129 struct nfsd4_seek *seek) 1130 { 1131 int whence; 1132 __be32 status; 1133 struct file *file; 1134 1135 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1136 &seek->seek_stateid, 1137 RD_STATE, &file, NULL); 1138 if (status) { 1139 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1140 return status; 1141 } 1142 1143 switch (seek->seek_whence) { 1144 case NFS4_CONTENT_DATA: 1145 whence = SEEK_DATA; 1146 break; 1147 case NFS4_CONTENT_HOLE: 1148 whence = SEEK_HOLE; 1149 break; 1150 default: 1151 status = nfserr_union_notsupp; 1152 goto out; 1153 } 1154 1155 /* 1156 * Note: This call does change file->f_pos, but nothing in NFSD 1157 * should ever file->f_pos. 1158 */ 1159 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); 1160 if (seek->seek_pos < 0) 1161 status = nfserrno(seek->seek_pos); 1162 else if (seek->seek_pos >= i_size_read(file_inode(file))) 1163 seek->seek_eof = true; 1164 1165 out: 1166 fput(file); 1167 return status; 1168 } 1169 1170 /* This routine never returns NFS_OK! If there are no other errors, it 1171 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1172 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1173 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1174 */ 1175 static __be32 1176 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1177 struct nfsd4_verify *verify) 1178 { 1179 __be32 *buf, *p; 1180 int count; 1181 __be32 status; 1182 1183 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1184 if (status) 1185 return status; 1186 1187 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1188 if (status) 1189 return status; 1190 1191 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1192 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1193 return nfserr_inval; 1194 if (verify->ve_attrlen & 3) 1195 return nfserr_inval; 1196 1197 /* count in words: 1198 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1199 */ 1200 count = 4 + (verify->ve_attrlen >> 2); 1201 buf = kmalloc(count << 2, GFP_KERNEL); 1202 if (!buf) 1203 return nfserr_jukebox; 1204 1205 p = buf; 1206 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1207 cstate->current_fh.fh_export, 1208 cstate->current_fh.fh_dentry, 1209 verify->ve_bmval, 1210 rqstp, 0); 1211 /* 1212 * If nfsd4_encode_fattr() ran out of space, assume that's because 1213 * the attributes are longer (hence different) than those given: 1214 */ 1215 if (status == nfserr_resource) 1216 status = nfserr_not_same; 1217 if (status) 1218 goto out_kfree; 1219 1220 /* skip bitmap */ 1221 p = buf + 1 + ntohl(buf[0]); 1222 status = nfserr_not_same; 1223 if (ntohl(*p++) != verify->ve_attrlen) 1224 goto out_kfree; 1225 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1226 status = nfserr_same; 1227 1228 out_kfree: 1229 kfree(buf); 1230 return status; 1231 } 1232 1233 static __be32 1234 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1235 struct nfsd4_verify *verify) 1236 { 1237 __be32 status; 1238 1239 status = _nfsd4_verify(rqstp, cstate, verify); 1240 return status == nfserr_not_same ? nfs_ok : status; 1241 } 1242 1243 static __be32 1244 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1245 struct nfsd4_verify *verify) 1246 { 1247 __be32 status; 1248 1249 status = _nfsd4_verify(rqstp, cstate, verify); 1250 return status == nfserr_same ? nfs_ok : status; 1251 } 1252 1253 #ifdef CONFIG_NFSD_PNFS 1254 static const struct nfsd4_layout_ops * 1255 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1256 { 1257 if (!exp->ex_layout_types) { 1258 dprintk("%s: export does not support pNFS\n", __func__); 1259 return NULL; 1260 } 1261 1262 if (!(exp->ex_layout_types & (1 << layout_type))) { 1263 dprintk("%s: layout type %d not supported\n", 1264 __func__, layout_type); 1265 return NULL; 1266 } 1267 1268 return nfsd4_layout_ops[layout_type]; 1269 } 1270 1271 static __be32 1272 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1273 struct nfsd4_compound_state *cstate, 1274 struct nfsd4_getdeviceinfo *gdp) 1275 { 1276 const struct nfsd4_layout_ops *ops; 1277 struct nfsd4_deviceid_map *map; 1278 struct svc_export *exp; 1279 __be32 nfserr; 1280 1281 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1282 __func__, 1283 gdp->gd_layout_type, 1284 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1285 gdp->gd_maxcount); 1286 1287 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1288 if (!map) { 1289 dprintk("%s: couldn't find device ID to export mapping!\n", 1290 __func__); 1291 return nfserr_noent; 1292 } 1293 1294 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1295 if (IS_ERR(exp)) { 1296 dprintk("%s: could not find device id\n", __func__); 1297 return nfserr_noent; 1298 } 1299 1300 nfserr = nfserr_layoutunavailable; 1301 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1302 if (!ops) 1303 goto out; 1304 1305 nfserr = nfs_ok; 1306 if (gdp->gd_maxcount != 0) { 1307 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1308 rqstp, cstate->session->se_client, gdp); 1309 } 1310 1311 gdp->gd_notify_types &= ops->notify_types; 1312 out: 1313 exp_put(exp); 1314 return nfserr; 1315 } 1316 1317 static __be32 1318 nfsd4_layoutget(struct svc_rqst *rqstp, 1319 struct nfsd4_compound_state *cstate, 1320 struct nfsd4_layoutget *lgp) 1321 { 1322 struct svc_fh *current_fh = &cstate->current_fh; 1323 const struct nfsd4_layout_ops *ops; 1324 struct nfs4_layout_stateid *ls; 1325 __be32 nfserr; 1326 int accmode; 1327 1328 switch (lgp->lg_seg.iomode) { 1329 case IOMODE_READ: 1330 accmode = NFSD_MAY_READ; 1331 break; 1332 case IOMODE_RW: 1333 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE; 1334 break; 1335 default: 1336 dprintk("%s: invalid iomode %d\n", 1337 __func__, lgp->lg_seg.iomode); 1338 nfserr = nfserr_badiomode; 1339 goto out; 1340 } 1341 1342 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1343 if (nfserr) 1344 goto out; 1345 1346 nfserr = nfserr_layoutunavailable; 1347 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1348 if (!ops) 1349 goto out; 1350 1351 /* 1352 * Verify minlength and range as per RFC5661: 1353 * o If loga_length is less than loga_minlength, 1354 * the metadata server MUST return NFS4ERR_INVAL. 1355 * o If the sum of loga_offset and loga_minlength exceeds 1356 * NFS4_UINT64_MAX, and loga_minlength is not 1357 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1358 * o If the sum of loga_offset and loga_length exceeds 1359 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1360 * the error NFS4ERR_INVAL MUST result. 1361 */ 1362 nfserr = nfserr_inval; 1363 if (lgp->lg_seg.length < lgp->lg_minlength || 1364 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1365 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1366 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1367 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1368 goto out; 1369 if (lgp->lg_seg.length == 0) 1370 goto out; 1371 1372 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1373 true, lgp->lg_layout_type, &ls); 1374 if (nfserr) { 1375 trace_layout_get_lookup_fail(&lgp->lg_sid); 1376 goto out; 1377 } 1378 1379 nfserr = nfserr_recallconflict; 1380 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1381 goto out_put_stid; 1382 1383 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1384 current_fh, lgp); 1385 if (nfserr) 1386 goto out_put_stid; 1387 1388 nfserr = nfsd4_insert_layout(lgp, ls); 1389 1390 out_put_stid: 1391 mutex_unlock(&ls->ls_mutex); 1392 nfs4_put_stid(&ls->ls_stid); 1393 out: 1394 return nfserr; 1395 } 1396 1397 static __be32 1398 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1399 struct nfsd4_compound_state *cstate, 1400 struct nfsd4_layoutcommit *lcp) 1401 { 1402 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1403 struct svc_fh *current_fh = &cstate->current_fh; 1404 const struct nfsd4_layout_ops *ops; 1405 loff_t new_size = lcp->lc_last_wr + 1; 1406 struct inode *inode; 1407 struct nfs4_layout_stateid *ls; 1408 __be32 nfserr; 1409 1410 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 1411 if (nfserr) 1412 goto out; 1413 1414 nfserr = nfserr_layoutunavailable; 1415 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 1416 if (!ops) 1417 goto out; 1418 inode = d_inode(current_fh->fh_dentry); 1419 1420 nfserr = nfserr_inval; 1421 if (new_size <= seg->offset) { 1422 dprintk("pnfsd: last write before layout segment\n"); 1423 goto out; 1424 } 1425 if (new_size > seg->offset + seg->length) { 1426 dprintk("pnfsd: last write beyond layout segment\n"); 1427 goto out; 1428 } 1429 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 1430 dprintk("pnfsd: layoutcommit beyond EOF\n"); 1431 goto out; 1432 } 1433 1434 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 1435 false, lcp->lc_layout_type, 1436 &ls); 1437 if (nfserr) { 1438 trace_layout_commit_lookup_fail(&lcp->lc_sid); 1439 /* fixup error code as per RFC5661 */ 1440 if (nfserr == nfserr_bad_stateid) 1441 nfserr = nfserr_badlayout; 1442 goto out; 1443 } 1444 1445 /* LAYOUTCOMMIT does not require any serialization */ 1446 mutex_unlock(&ls->ls_mutex); 1447 1448 if (new_size > i_size_read(inode)) { 1449 lcp->lc_size_chg = 1; 1450 lcp->lc_newsize = new_size; 1451 } else { 1452 lcp->lc_size_chg = 0; 1453 } 1454 1455 nfserr = ops->proc_layoutcommit(inode, lcp); 1456 nfs4_put_stid(&ls->ls_stid); 1457 out: 1458 return nfserr; 1459 } 1460 1461 static __be32 1462 nfsd4_layoutreturn(struct svc_rqst *rqstp, 1463 struct nfsd4_compound_state *cstate, 1464 struct nfsd4_layoutreturn *lrp) 1465 { 1466 struct svc_fh *current_fh = &cstate->current_fh; 1467 __be32 nfserr; 1468 1469 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 1470 if (nfserr) 1471 goto out; 1472 1473 nfserr = nfserr_layoutunavailable; 1474 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 1475 goto out; 1476 1477 switch (lrp->lr_seg.iomode) { 1478 case IOMODE_READ: 1479 case IOMODE_RW: 1480 case IOMODE_ANY: 1481 break; 1482 default: 1483 dprintk("%s: invalid iomode %d\n", __func__, 1484 lrp->lr_seg.iomode); 1485 nfserr = nfserr_inval; 1486 goto out; 1487 } 1488 1489 switch (lrp->lr_return_type) { 1490 case RETURN_FILE: 1491 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 1492 break; 1493 case RETURN_FSID: 1494 case RETURN_ALL: 1495 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 1496 break; 1497 default: 1498 dprintk("%s: invalid return_type %d\n", __func__, 1499 lrp->lr_return_type); 1500 nfserr = nfserr_inval; 1501 break; 1502 } 1503 out: 1504 return nfserr; 1505 } 1506 #endif /* CONFIG_NFSD_PNFS */ 1507 1508 /* 1509 * NULL call. 1510 */ 1511 static __be32 1512 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1513 { 1514 return nfs_ok; 1515 } 1516 1517 static inline void nfsd4_increment_op_stats(u32 opnum) 1518 { 1519 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1520 nfsdstats.nfs4_opcount[opnum]++; 1521 } 1522 1523 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1524 void *); 1525 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1526 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1527 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1528 1529 enum nfsd4_op_flags { 1530 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1531 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1532 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1533 /* For rfc 5661 section 2.6.3.1.1: */ 1534 OP_HANDLES_WRONGSEC = 1 << 3, 1535 OP_IS_PUTFH_LIKE = 1 << 4, 1536 /* 1537 * These are the ops whose result size we estimate before 1538 * encoding, to avoid performing an op then not being able to 1539 * respond or cache a response. This includes writes and setattrs 1540 * as well as the operations usually called "nonidempotent": 1541 */ 1542 OP_MODIFIES_SOMETHING = 1 << 5, 1543 /* 1544 * Cache compounds containing these ops in the xid-based drc: 1545 * We use the DRC for compounds containing non-idempotent 1546 * operations, *except* those that are 4.1-specific (since 1547 * sessions provide their own EOS), and except for stateful 1548 * operations other than setclientid and setclientid_confirm 1549 * (since sequence numbers provide EOS for open, lock, etc in 1550 * the v4.0 case). 1551 */ 1552 OP_CACHEME = 1 << 6, 1553 /* 1554 * These are ops which clear current state id. 1555 */ 1556 OP_CLEAR_STATEID = 1 << 7, 1557 }; 1558 1559 struct nfsd4_operation { 1560 nfsd4op_func op_func; 1561 u32 op_flags; 1562 char *op_name; 1563 /* Try to get response size before operation */ 1564 nfsd4op_rsize op_rsize_bop; 1565 stateid_getter op_get_currentstateid; 1566 stateid_setter op_set_currentstateid; 1567 }; 1568 1569 static struct nfsd4_operation nfsd4_ops[]; 1570 1571 static const char *nfsd4_op_name(unsigned opnum); 1572 1573 /* 1574 * Enforce NFSv4.1 COMPOUND ordering rules: 1575 * 1576 * Also note, enforced elsewhere: 1577 * - SEQUENCE other than as first op results in 1578 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1579 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1580 * (Enforced in nfsd4_bind_conn_to_session().) 1581 * - DESTROY_SESSION must be the final operation in a compound, if 1582 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1583 * (Enforced in nfsd4_destroy_session().) 1584 */ 1585 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1586 { 1587 struct nfsd4_op *op = &args->ops[0]; 1588 1589 /* These ordering requirements don't apply to NFSv4.0: */ 1590 if (args->minorversion == 0) 1591 return nfs_ok; 1592 /* This is weird, but OK, not our problem: */ 1593 if (args->opcnt == 0) 1594 return nfs_ok; 1595 if (op->status == nfserr_op_illegal) 1596 return nfs_ok; 1597 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1598 return nfserr_op_not_in_session; 1599 if (op->opnum == OP_SEQUENCE) 1600 return nfs_ok; 1601 if (args->opcnt != 1) 1602 return nfserr_not_only_op; 1603 return nfs_ok; 1604 } 1605 1606 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1607 { 1608 return &nfsd4_ops[op->opnum]; 1609 } 1610 1611 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1612 { 1613 if (op->opnum == OP_ILLEGAL) 1614 return false; 1615 return OPDESC(op)->op_flags & OP_CACHEME; 1616 } 1617 1618 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1619 { 1620 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1621 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1622 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1623 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1624 struct nfsd4_operation *thisd; 1625 struct nfsd4_operation *nextd; 1626 1627 thisd = OPDESC(this); 1628 /* 1629 * Most ops check wronsec on our own; only the putfh-like ops 1630 * have special rules. 1631 */ 1632 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1633 return false; 1634 /* 1635 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1636 * put-filehandle operation if we're not going to use the 1637 * result: 1638 */ 1639 if (argp->opcnt == resp->opcnt) 1640 return false; 1641 if (next->opnum == OP_ILLEGAL) 1642 return false; 1643 nextd = OPDESC(next); 1644 /* 1645 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1646 * errors themselves as necessary; others should check for them 1647 * now: 1648 */ 1649 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1650 } 1651 1652 static void svcxdr_init_encode(struct svc_rqst *rqstp, 1653 struct nfsd4_compoundres *resp) 1654 { 1655 struct xdr_stream *xdr = &resp->xdr; 1656 struct xdr_buf *buf = &rqstp->rq_res; 1657 struct kvec *head = buf->head; 1658 1659 xdr->buf = buf; 1660 xdr->iov = head; 1661 xdr->p = head->iov_base + head->iov_len; 1662 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1663 /* Tail and page_len should be zero at this point: */ 1664 buf->len = buf->head[0].iov_len; 1665 xdr->scratch.iov_len = 0; 1666 xdr->page_ptr = buf->pages - 1; 1667 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1668 - rqstp->rq_auth_slack; 1669 } 1670 1671 /* 1672 * COMPOUND call. 1673 */ 1674 static __be32 1675 nfsd4_proc_compound(struct svc_rqst *rqstp, 1676 struct nfsd4_compoundargs *args, 1677 struct nfsd4_compoundres *resp) 1678 { 1679 struct nfsd4_op *op; 1680 struct nfsd4_operation *opdesc; 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 opdesc = OPDESC(op); 1734 1735 if (!current_fh->fh_dentry) { 1736 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1737 op->status = nfserr_nofilehandle; 1738 goto encode_op; 1739 } 1740 } else if (current_fh->fh_export->ex_fslocs.migrated && 1741 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1742 op->status = nfserr_moved; 1743 goto encode_op; 1744 } 1745 1746 fh_clear_wcc(current_fh); 1747 1748 /* If op is non-idempotent */ 1749 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1750 /* 1751 * Don't execute this op if we couldn't encode a 1752 * succesful reply: 1753 */ 1754 u32 plen = opdesc->op_rsize_bop(rqstp, op); 1755 /* 1756 * Plus if there's another operation, make sure 1757 * we'll have space to at least encode an error: 1758 */ 1759 if (resp->opcnt < args->opcnt) 1760 plen += COMPOUND_ERR_SLACK_SPACE; 1761 op->status = nfsd4_check_resp_size(resp, plen); 1762 } 1763 1764 if (op->status) 1765 goto encode_op; 1766 1767 if (opdesc->op_get_currentstateid) 1768 opdesc->op_get_currentstateid(cstate, &op->u); 1769 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1770 1771 if (!op->status) { 1772 if (opdesc->op_set_currentstateid) 1773 opdesc->op_set_currentstateid(cstate, &op->u); 1774 1775 if (opdesc->op_flags & OP_CLEAR_STATEID) 1776 clear_current_stateid(cstate); 1777 1778 if (need_wrongsec_check(rqstp)) 1779 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 1780 } 1781 1782 encode_op: 1783 /* Only from SEQUENCE */ 1784 if (cstate->status == nfserr_replay_cache) { 1785 dprintk("%s NFS4.1 replay from cache\n", __func__); 1786 status = op->status; 1787 goto out; 1788 } 1789 if (op->status == nfserr_replay_me) { 1790 op->replay = &cstate->replay_owner->so_replay; 1791 nfsd4_encode_replay(&resp->xdr, op); 1792 status = op->status = op->replay->rp_status; 1793 } else { 1794 nfsd4_encode_operation(resp, op); 1795 status = op->status; 1796 } 1797 1798 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1799 args->ops, args->opcnt, resp->opcnt, op->opnum, 1800 be32_to_cpu(status)); 1801 1802 nfsd4_cstate_clear_replay(cstate); 1803 nfsd4_increment_op_stats(op->opnum); 1804 } 1805 1806 cstate->status = status; 1807 fh_put(current_fh); 1808 fh_put(save_fh); 1809 BUG_ON(cstate->replay_owner); 1810 out: 1811 /* Reset deferral mechanism for RPC deferrals */ 1812 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1813 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1814 return status; 1815 } 1816 1817 #define op_encode_hdr_size (2) 1818 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1819 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1820 #define op_encode_change_info_maxsz (5) 1821 #define nfs4_fattr_bitmap_maxsz (4) 1822 1823 /* We'll fall back on returning no lockowner if run out of space: */ 1824 #define op_encode_lockowner_maxsz (0) 1825 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1826 1827 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1828 1829 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1830 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1831 op_encode_ace_maxsz) 1832 1833 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1834 1835 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1836 { 1837 return (op_encode_hdr_size) * sizeof(__be32); 1838 } 1839 1840 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1841 { 1842 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1843 } 1844 1845 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1846 { 1847 /* ac_supported, ac_resp_access */ 1848 return (op_encode_hdr_size + 2)* sizeof(__be32); 1849 } 1850 1851 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1852 { 1853 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1854 } 1855 1856 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1857 { 1858 return (op_encode_hdr_size + op_encode_change_info_maxsz 1859 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1860 } 1861 1862 /* 1863 * Note since this is an idempotent operation we won't insist on failing 1864 * the op prematurely if the estimate is too large. We may turn off splice 1865 * reads unnecessarily. 1866 */ 1867 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1868 struct nfsd4_op *op) 1869 { 1870 u32 *bmap = op->u.getattr.ga_bmval; 1871 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1872 u32 ret = 0; 1873 1874 if (bmap0 & FATTR4_WORD0_ACL) 1875 return svc_max_payload(rqstp); 1876 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1877 return svc_max_payload(rqstp); 1878 1879 if (bmap1 & FATTR4_WORD1_OWNER) { 1880 ret += IDMAP_NAMESZ + 4; 1881 bmap1 &= ~FATTR4_WORD1_OWNER; 1882 } 1883 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1884 ret += IDMAP_NAMESZ + 4; 1885 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1886 } 1887 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1888 ret += NFS4_FHSIZE + 4; 1889 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1890 } 1891 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1892 ret += NFS4_MAXLABELLEN + 12; 1893 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1894 } 1895 /* 1896 * Largest of remaining attributes are 16 bytes (e.g., 1897 * supported_attributes) 1898 */ 1899 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1900 /* bitmask, length */ 1901 ret += 20; 1902 return ret; 1903 } 1904 1905 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1906 { 1907 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE; 1908 } 1909 1910 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1911 { 1912 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1913 * sizeof(__be32); 1914 } 1915 1916 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1917 { 1918 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1919 * sizeof(__be32); 1920 } 1921 1922 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1923 { 1924 return (op_encode_hdr_size + op_encode_stateid_maxsz 1925 + op_encode_change_info_maxsz + 1 1926 + nfs4_fattr_bitmap_maxsz 1927 + op_encode_delegation_maxsz) * sizeof(__be32); 1928 } 1929 1930 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1931 { 1932 u32 maxcount = 0, rlen = 0; 1933 1934 maxcount = svc_max_payload(rqstp); 1935 rlen = min(op->u.read.rd_length, maxcount); 1936 1937 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1938 } 1939 1940 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1941 { 1942 u32 maxcount = 0, rlen = 0; 1943 1944 maxcount = svc_max_payload(rqstp); 1945 rlen = min(op->u.readdir.rd_maxcount, maxcount); 1946 1947 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1948 XDR_QUADLEN(rlen)) * sizeof(__be32); 1949 } 1950 1951 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1952 { 1953 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE; 1954 } 1955 1956 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1957 { 1958 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1959 * sizeof(__be32); 1960 } 1961 1962 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1963 { 1964 return (op_encode_hdr_size + op_encode_change_info_maxsz 1965 + op_encode_change_info_maxsz) * sizeof(__be32); 1966 } 1967 1968 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1969 struct nfsd4_op *op) 1970 { 1971 return (op_encode_hdr_size 1972 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 1973 } 1974 1975 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1976 { 1977 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids) 1978 * sizeof(__be32); 1979 } 1980 1981 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1982 { 1983 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1984 } 1985 1986 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1987 { 1988 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR * 1989 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32); 1990 } 1991 1992 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1993 { 1994 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1995 sizeof(__be32); 1996 } 1997 1998 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1999 { 2000 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 2001 } 2002 2003 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2004 { 2005 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 2006 1 + 1 + /* eir_flags, spr_how */\ 2007 4 + /* spo_must_enforce & _allow with bitmap */\ 2008 2 + /*eir_server_owner.so_minor_id */\ 2009 /* eir_server_owner.so_major_id<> */\ 2010 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2011 /* eir_server_scope<> */\ 2012 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2013 1 + /* eir_server_impl_id array length */\ 2014 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 2015 } 2016 2017 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2018 { 2019 return (op_encode_hdr_size + \ 2020 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 2021 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 2022 } 2023 2024 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2025 { 2026 return (op_encode_hdr_size + \ 2027 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 2028 2 + /* csr_sequence, csr_flags */\ 2029 op_encode_channel_attrs_maxsz + \ 2030 op_encode_channel_attrs_maxsz) * sizeof(__be32); 2031 } 2032 2033 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2034 { 2035 return (op_encode_hdr_size + 2036 1 /* wr_callback */ + 2037 op_encode_stateid_maxsz /* wr_callback */ + 2038 2 /* wr_count */ + 2039 1 /* wr_committed */ + 2040 op_encode_verifier_maxsz + 2041 1 /* cr_consecutive */ + 2042 1 /* cr_synchronous */) * sizeof(__be32); 2043 } 2044 2045 #ifdef CONFIG_NFSD_PNFS 2046 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2047 { 2048 u32 maxcount = 0, rlen = 0; 2049 2050 maxcount = svc_max_payload(rqstp); 2051 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount); 2052 2053 return (op_encode_hdr_size + 2054 1 /* gd_layout_type*/ + 2055 XDR_QUADLEN(rlen) + 2056 2 /* gd_notify_types */) * sizeof(__be32); 2057 } 2058 2059 /* 2060 * At this stage we don't really know what layout driver will handle the request, 2061 * so we need to define an arbitrary upper bound here. 2062 */ 2063 #define MAX_LAYOUT_SIZE 128 2064 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2065 { 2066 return (op_encode_hdr_size + 2067 1 /* logr_return_on_close */ + 2068 op_encode_stateid_maxsz + 2069 1 /* nr of layouts */ + 2070 MAX_LAYOUT_SIZE) * sizeof(__be32); 2071 } 2072 2073 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2074 { 2075 return (op_encode_hdr_size + 2076 1 /* locr_newsize */ + 2077 2 /* ns_size */) * sizeof(__be32); 2078 } 2079 2080 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2081 { 2082 return (op_encode_hdr_size + 2083 1 /* lrs_stateid */ + 2084 op_encode_stateid_maxsz) * sizeof(__be32); 2085 } 2086 #endif /* CONFIG_NFSD_PNFS */ 2087 2088 2089 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2090 { 2091 return (op_encode_hdr_size + 3) * sizeof(__be32); 2092 } 2093 2094 static struct nfsd4_operation nfsd4_ops[] = { 2095 [OP_ACCESS] = { 2096 .op_func = (nfsd4op_func)nfsd4_access, 2097 .op_name = "OP_ACCESS", 2098 .op_rsize_bop = (nfsd4op_rsize)nfsd4_access_rsize, 2099 }, 2100 [OP_CLOSE] = { 2101 .op_func = (nfsd4op_func)nfsd4_close, 2102 .op_flags = OP_MODIFIES_SOMETHING, 2103 .op_name = "OP_CLOSE", 2104 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2105 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 2106 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 2107 }, 2108 [OP_COMMIT] = { 2109 .op_func = (nfsd4op_func)nfsd4_commit, 2110 .op_flags = OP_MODIFIES_SOMETHING, 2111 .op_name = "OP_COMMIT", 2112 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 2113 }, 2114 [OP_CREATE] = { 2115 .op_func = (nfsd4op_func)nfsd4_create, 2116 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2117 .op_name = "OP_CREATE", 2118 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 2119 }, 2120 [OP_DELEGRETURN] = { 2121 .op_func = (nfsd4op_func)nfsd4_delegreturn, 2122 .op_flags = OP_MODIFIES_SOMETHING, 2123 .op_name = "OP_DELEGRETURN", 2124 .op_rsize_bop = nfsd4_only_status_rsize, 2125 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 2126 }, 2127 [OP_GETATTR] = { 2128 .op_func = (nfsd4op_func)nfsd4_getattr, 2129 .op_flags = ALLOWED_ON_ABSENT_FS, 2130 .op_rsize_bop = nfsd4_getattr_rsize, 2131 .op_name = "OP_GETATTR", 2132 }, 2133 [OP_GETFH] = { 2134 .op_func = (nfsd4op_func)nfsd4_getfh, 2135 .op_name = "OP_GETFH", 2136 .op_rsize_bop = (nfsd4op_rsize)nfsd4_getfh_rsize, 2137 }, 2138 [OP_LINK] = { 2139 .op_func = (nfsd4op_func)nfsd4_link, 2140 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2141 | OP_CACHEME, 2142 .op_name = "OP_LINK", 2143 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 2144 }, 2145 [OP_LOCK] = { 2146 .op_func = (nfsd4op_func)nfsd4_lock, 2147 .op_flags = OP_MODIFIES_SOMETHING, 2148 .op_name = "OP_LOCK", 2149 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 2150 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 2151 }, 2152 [OP_LOCKT] = { 2153 .op_func = (nfsd4op_func)nfsd4_lockt, 2154 .op_name = "OP_LOCKT", 2155 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 2156 }, 2157 [OP_LOCKU] = { 2158 .op_func = (nfsd4op_func)nfsd4_locku, 2159 .op_flags = OP_MODIFIES_SOMETHING, 2160 .op_name = "OP_LOCKU", 2161 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2162 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 2163 }, 2164 [OP_LOOKUP] = { 2165 .op_func = (nfsd4op_func)nfsd4_lookup, 2166 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2167 .op_name = "OP_LOOKUP", 2168 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2169 }, 2170 [OP_LOOKUPP] = { 2171 .op_func = (nfsd4op_func)nfsd4_lookupp, 2172 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2173 .op_name = "OP_LOOKUPP", 2174 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2175 }, 2176 [OP_NVERIFY] = { 2177 .op_func = (nfsd4op_func)nfsd4_nverify, 2178 .op_name = "OP_NVERIFY", 2179 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2180 }, 2181 [OP_OPEN] = { 2182 .op_func = (nfsd4op_func)nfsd4_open, 2183 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2184 .op_name = "OP_OPEN", 2185 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 2186 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 2187 }, 2188 [OP_OPEN_CONFIRM] = { 2189 .op_func = (nfsd4op_func)nfsd4_open_confirm, 2190 .op_flags = OP_MODIFIES_SOMETHING, 2191 .op_name = "OP_OPEN_CONFIRM", 2192 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2193 }, 2194 [OP_OPEN_DOWNGRADE] = { 2195 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 2196 .op_flags = OP_MODIFIES_SOMETHING, 2197 .op_name = "OP_OPEN_DOWNGRADE", 2198 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2199 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 2200 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 2201 }, 2202 [OP_PUTFH] = { 2203 .op_func = (nfsd4op_func)nfsd4_putfh, 2204 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2205 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2206 .op_name = "OP_PUTFH", 2207 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2208 }, 2209 [OP_PUTPUBFH] = { 2210 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2211 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2212 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2213 .op_name = "OP_PUTPUBFH", 2214 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2215 }, 2216 [OP_PUTROOTFH] = { 2217 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2218 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2219 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2220 .op_name = "OP_PUTROOTFH", 2221 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2222 }, 2223 [OP_READ] = { 2224 .op_func = (nfsd4op_func)nfsd4_read, 2225 .op_name = "OP_READ", 2226 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 2227 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 2228 }, 2229 [OP_READDIR] = { 2230 .op_func = (nfsd4op_func)nfsd4_readdir, 2231 .op_name = "OP_READDIR", 2232 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 2233 }, 2234 [OP_READLINK] = { 2235 .op_func = (nfsd4op_func)nfsd4_readlink, 2236 .op_name = "OP_READLINK", 2237 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readlink_rsize, 2238 }, 2239 [OP_REMOVE] = { 2240 .op_func = (nfsd4op_func)nfsd4_remove, 2241 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2242 .op_name = "OP_REMOVE", 2243 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 2244 }, 2245 [OP_RENAME] = { 2246 .op_func = (nfsd4op_func)nfsd4_rename, 2247 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2248 .op_name = "OP_RENAME", 2249 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 2250 }, 2251 [OP_RENEW] = { 2252 .op_func = (nfsd4op_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 = (nfsd4op_rsize)nfsd4_only_status_rsize, 2257 2258 }, 2259 [OP_RESTOREFH] = { 2260 .op_func = (nfsd4op_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 = (nfsd4op_rsize)nfsd4_only_status_rsize, 2265 }, 2266 [OP_SAVEFH] = { 2267 .op_func = (nfsd4op_func)nfsd4_savefh, 2268 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2269 .op_name = "OP_SAVEFH", 2270 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2271 }, 2272 [OP_SECINFO] = { 2273 .op_func = (nfsd4op_func)nfsd4_secinfo, 2274 .op_flags = OP_HANDLES_WRONGSEC, 2275 .op_name = "OP_SECINFO", 2276 .op_rsize_bop = (nfsd4op_rsize)nfsd4_secinfo_rsize, 2277 }, 2278 [OP_SETATTR] = { 2279 .op_func = (nfsd4op_func)nfsd4_setattr, 2280 .op_name = "OP_SETATTR", 2281 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2282 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 2283 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 2284 }, 2285 [OP_SETCLIENTID] = { 2286 .op_func = (nfsd4op_func)nfsd4_setclientid, 2287 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2288 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2289 .op_name = "OP_SETCLIENTID", 2290 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 2291 }, 2292 [OP_SETCLIENTID_CONFIRM] = { 2293 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 2294 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2295 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2296 .op_name = "OP_SETCLIENTID_CONFIRM", 2297 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2298 }, 2299 [OP_VERIFY] = { 2300 .op_func = (nfsd4op_func)nfsd4_verify, 2301 .op_name = "OP_VERIFY", 2302 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2303 }, 2304 [OP_WRITE] = { 2305 .op_func = (nfsd4op_func)nfsd4_write, 2306 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2307 .op_name = "OP_WRITE", 2308 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 2309 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 2310 }, 2311 [OP_RELEASE_LOCKOWNER] = { 2312 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 2313 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2314 | OP_MODIFIES_SOMETHING, 2315 .op_name = "OP_RELEASE_LOCKOWNER", 2316 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2317 }, 2318 2319 /* NFSv4.1 operations */ 2320 [OP_EXCHANGE_ID] = { 2321 .op_func = (nfsd4op_func)nfsd4_exchange_id, 2322 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2323 | OP_MODIFIES_SOMETHING, 2324 .op_name = "OP_EXCHANGE_ID", 2325 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 2326 }, 2327 [OP_BACKCHANNEL_CTL] = { 2328 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 2329 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2330 .op_name = "OP_BACKCHANNEL_CTL", 2331 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2332 }, 2333 [OP_BIND_CONN_TO_SESSION] = { 2334 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 2335 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2336 | OP_MODIFIES_SOMETHING, 2337 .op_name = "OP_BIND_CONN_TO_SESSION", 2338 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 2339 }, 2340 [OP_CREATE_SESSION] = { 2341 .op_func = (nfsd4op_func)nfsd4_create_session, 2342 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2343 | OP_MODIFIES_SOMETHING, 2344 .op_name = "OP_CREATE_SESSION", 2345 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 2346 }, 2347 [OP_DESTROY_SESSION] = { 2348 .op_func = (nfsd4op_func)nfsd4_destroy_session, 2349 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2350 | OP_MODIFIES_SOMETHING, 2351 .op_name = "OP_DESTROY_SESSION", 2352 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2353 }, 2354 [OP_SEQUENCE] = { 2355 .op_func = (nfsd4op_func)nfsd4_sequence, 2356 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 2357 .op_name = "OP_SEQUENCE", 2358 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize, 2359 }, 2360 [OP_DESTROY_CLIENTID] = { 2361 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 2362 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2363 | OP_MODIFIES_SOMETHING, 2364 .op_name = "OP_DESTROY_CLIENTID", 2365 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2366 }, 2367 [OP_RECLAIM_COMPLETE] = { 2368 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 2369 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2370 .op_name = "OP_RECLAIM_COMPLETE", 2371 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2372 }, 2373 [OP_SECINFO_NO_NAME] = { 2374 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 2375 .op_flags = OP_HANDLES_WRONGSEC, 2376 .op_name = "OP_SECINFO_NO_NAME", 2377 .op_rsize_bop = (nfsd4op_rsize)nfsd4_secinfo_rsize, 2378 }, 2379 [OP_TEST_STATEID] = { 2380 .op_func = (nfsd4op_func)nfsd4_test_stateid, 2381 .op_flags = ALLOWED_WITHOUT_FH, 2382 .op_name = "OP_TEST_STATEID", 2383 .op_rsize_bop = (nfsd4op_rsize)nfsd4_test_stateid_rsize, 2384 }, 2385 [OP_FREE_STATEID] = { 2386 .op_func = (nfsd4op_func)nfsd4_free_stateid, 2387 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2388 .op_name = "OP_FREE_STATEID", 2389 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 2390 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2391 }, 2392 #ifdef CONFIG_NFSD_PNFS 2393 [OP_GETDEVICEINFO] = { 2394 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo, 2395 .op_flags = ALLOWED_WITHOUT_FH, 2396 .op_name = "OP_GETDEVICEINFO", 2397 .op_rsize_bop = (nfsd4op_rsize)nfsd4_getdeviceinfo_rsize, 2398 }, 2399 [OP_LAYOUTGET] = { 2400 .op_func = (nfsd4op_func)nfsd4_layoutget, 2401 .op_flags = OP_MODIFIES_SOMETHING, 2402 .op_name = "OP_LAYOUTGET", 2403 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize, 2404 }, 2405 [OP_LAYOUTCOMMIT] = { 2406 .op_func = (nfsd4op_func)nfsd4_layoutcommit, 2407 .op_flags = OP_MODIFIES_SOMETHING, 2408 .op_name = "OP_LAYOUTCOMMIT", 2409 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize, 2410 }, 2411 [OP_LAYOUTRETURN] = { 2412 .op_func = (nfsd4op_func)nfsd4_layoutreturn, 2413 .op_flags = OP_MODIFIES_SOMETHING, 2414 .op_name = "OP_LAYOUTRETURN", 2415 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize, 2416 }, 2417 #endif /* CONFIG_NFSD_PNFS */ 2418 2419 /* NFSv4.2 operations */ 2420 [OP_ALLOCATE] = { 2421 .op_func = (nfsd4op_func)nfsd4_allocate, 2422 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2423 .op_name = "OP_ALLOCATE", 2424 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2425 }, 2426 [OP_DEALLOCATE] = { 2427 .op_func = (nfsd4op_func)nfsd4_deallocate, 2428 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2429 .op_name = "OP_DEALLOCATE", 2430 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2431 }, 2432 [OP_CLONE] = { 2433 .op_func = (nfsd4op_func)nfsd4_clone, 2434 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2435 .op_name = "OP_CLONE", 2436 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2437 }, 2438 [OP_COPY] = { 2439 .op_func = (nfsd4op_func)nfsd4_copy, 2440 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2441 .op_name = "OP_COPY", 2442 .op_rsize_bop = (nfsd4op_rsize)nfsd4_copy_rsize, 2443 }, 2444 [OP_SEEK] = { 2445 .op_func = (nfsd4op_func)nfsd4_seek, 2446 .op_name = "OP_SEEK", 2447 .op_rsize_bop = (nfsd4op_rsize)nfsd4_seek_rsize, 2448 }, 2449 }; 2450 2451 /** 2452 * nfsd4_spo_must_allow - Determine if the compound op contains an 2453 * operation that is allowed to be sent with machine credentials 2454 * 2455 * @rqstp: a pointer to the struct svc_rqst 2456 * 2457 * Checks to see if the compound contains a spo_must_allow op 2458 * and confirms that it was sent with the proper machine creds. 2459 */ 2460 2461 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 2462 { 2463 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2464 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2465 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2466 struct nfsd4_compound_state *cstate = &resp->cstate; 2467 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 2468 u32 opiter; 2469 2470 if (!cstate->minorversion) 2471 return false; 2472 2473 if (cstate->spo_must_allowed == true) 2474 return true; 2475 2476 opiter = resp->opcnt; 2477 while (opiter < argp->opcnt) { 2478 this = &argp->ops[opiter++]; 2479 if (test_bit(this->opnum, allow->u.longs) && 2480 cstate->clp->cl_mach_cred && 2481 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 2482 cstate->spo_must_allowed = true; 2483 return true; 2484 } 2485 } 2486 cstate->spo_must_allowed = false; 2487 return false; 2488 } 2489 2490 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 2491 { 2492 if (op->opnum == OP_ILLEGAL) 2493 return op_encode_hdr_size * sizeof(__be32); 2494 2495 BUG_ON(OPDESC(op)->op_rsize_bop == NULL); 2496 return OPDESC(op)->op_rsize_bop(rqstp, op); 2497 } 2498 2499 void warn_on_nonidempotent_op(struct nfsd4_op *op) 2500 { 2501 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 2502 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 2503 op->opnum, nfsd4_op_name(op->opnum)); 2504 WARN_ON_ONCE(1); 2505 } 2506 } 2507 2508 static const char *nfsd4_op_name(unsigned opnum) 2509 { 2510 if (opnum < ARRAY_SIZE(nfsd4_ops)) 2511 return nfsd4_ops[opnum].op_name; 2512 return "unknown_operation"; 2513 } 2514 2515 #define nfsd4_voidres nfsd4_voidargs 2516 struct nfsd4_voidargs { int dummy; }; 2517 2518 static struct svc_procedure nfsd_procedures4[2] = { 2519 [NFSPROC4_NULL] = { 2520 .pc_func = (svc_procfunc) nfsd4_proc_null, 2521 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 2522 .pc_argsize = sizeof(struct nfsd4_voidargs), 2523 .pc_ressize = sizeof(struct nfsd4_voidres), 2524 .pc_cachetype = RC_NOCACHE, 2525 .pc_xdrressize = 1, 2526 }, 2527 [NFSPROC4_COMPOUND] = { 2528 .pc_func = (svc_procfunc) nfsd4_proc_compound, 2529 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 2530 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 2531 .pc_argsize = sizeof(struct nfsd4_compoundargs), 2532 .pc_ressize = sizeof(struct nfsd4_compoundres), 2533 .pc_release = nfsd4_release_compoundargs, 2534 .pc_cachetype = RC_NOCACHE, 2535 .pc_xdrressize = NFSD_BUFSIZE/4, 2536 }, 2537 }; 2538 2539 struct svc_version nfsd_version4 = { 2540 .vs_vers = 4, 2541 .vs_nproc = 2, 2542 .vs_proc = nfsd_procedures4, 2543 .vs_dispatch = nfsd_dispatch, 2544 .vs_xdrsize = NFS4_SVC_XDRSIZE, 2545 .vs_rpcb_optnl = true, 2546 .vs_need_cong_ctrl = true, 2547 }; 2548 2549 /* 2550 * Local variables: 2551 * c-basic-offset: 8 2552 * End: 2553 */ 2554