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 (layout_type >= LAYOUT_TYPE_MAX || 1263 !(exp->ex_layout_types & (1 << layout_type))) { 1264 dprintk("%s: layout type %d not supported\n", 1265 __func__, layout_type); 1266 return NULL; 1267 } 1268 1269 return nfsd4_layout_ops[layout_type]; 1270 } 1271 1272 static __be32 1273 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1274 struct nfsd4_compound_state *cstate, 1275 struct nfsd4_getdeviceinfo *gdp) 1276 { 1277 const struct nfsd4_layout_ops *ops; 1278 struct nfsd4_deviceid_map *map; 1279 struct svc_export *exp; 1280 __be32 nfserr; 1281 1282 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1283 __func__, 1284 gdp->gd_layout_type, 1285 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1286 gdp->gd_maxcount); 1287 1288 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1289 if (!map) { 1290 dprintk("%s: couldn't find device ID to export mapping!\n", 1291 __func__); 1292 return nfserr_noent; 1293 } 1294 1295 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1296 if (IS_ERR(exp)) { 1297 dprintk("%s: could not find device id\n", __func__); 1298 return nfserr_noent; 1299 } 1300 1301 nfserr = nfserr_layoutunavailable; 1302 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1303 if (!ops) 1304 goto out; 1305 1306 nfserr = nfs_ok; 1307 if (gdp->gd_maxcount != 0) { 1308 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1309 rqstp, cstate->session->se_client, gdp); 1310 } 1311 1312 gdp->gd_notify_types &= ops->notify_types; 1313 out: 1314 exp_put(exp); 1315 return nfserr; 1316 } 1317 1318 static __be32 1319 nfsd4_layoutget(struct svc_rqst *rqstp, 1320 struct nfsd4_compound_state *cstate, 1321 struct nfsd4_layoutget *lgp) 1322 { 1323 struct svc_fh *current_fh = &cstate->current_fh; 1324 const struct nfsd4_layout_ops *ops; 1325 struct nfs4_layout_stateid *ls; 1326 __be32 nfserr; 1327 int accmode; 1328 1329 switch (lgp->lg_seg.iomode) { 1330 case IOMODE_READ: 1331 accmode = NFSD_MAY_READ; 1332 break; 1333 case IOMODE_RW: 1334 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE; 1335 break; 1336 default: 1337 dprintk("%s: invalid iomode %d\n", 1338 __func__, lgp->lg_seg.iomode); 1339 nfserr = nfserr_badiomode; 1340 goto out; 1341 } 1342 1343 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1344 if (nfserr) 1345 goto out; 1346 1347 nfserr = nfserr_layoutunavailable; 1348 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1349 if (!ops) 1350 goto out; 1351 1352 /* 1353 * Verify minlength and range as per RFC5661: 1354 * o If loga_length is less than loga_minlength, 1355 * the metadata server MUST return NFS4ERR_INVAL. 1356 * o If the sum of loga_offset and loga_minlength exceeds 1357 * NFS4_UINT64_MAX, and loga_minlength is not 1358 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1359 * o If the sum of loga_offset and loga_length exceeds 1360 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1361 * the error NFS4ERR_INVAL MUST result. 1362 */ 1363 nfserr = nfserr_inval; 1364 if (lgp->lg_seg.length < lgp->lg_minlength || 1365 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1366 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1367 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1368 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1369 goto out; 1370 if (lgp->lg_seg.length == 0) 1371 goto out; 1372 1373 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1374 true, lgp->lg_layout_type, &ls); 1375 if (nfserr) { 1376 trace_layout_get_lookup_fail(&lgp->lg_sid); 1377 goto out; 1378 } 1379 1380 nfserr = nfserr_recallconflict; 1381 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1382 goto out_put_stid; 1383 1384 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1385 current_fh, lgp); 1386 if (nfserr) 1387 goto out_put_stid; 1388 1389 nfserr = nfsd4_insert_layout(lgp, ls); 1390 1391 out_put_stid: 1392 mutex_unlock(&ls->ls_mutex); 1393 nfs4_put_stid(&ls->ls_stid); 1394 out: 1395 return nfserr; 1396 } 1397 1398 static __be32 1399 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1400 struct nfsd4_compound_state *cstate, 1401 struct nfsd4_layoutcommit *lcp) 1402 { 1403 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1404 struct svc_fh *current_fh = &cstate->current_fh; 1405 const struct nfsd4_layout_ops *ops; 1406 loff_t new_size = lcp->lc_last_wr + 1; 1407 struct inode *inode; 1408 struct nfs4_layout_stateid *ls; 1409 __be32 nfserr; 1410 1411 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 1412 if (nfserr) 1413 goto out; 1414 1415 nfserr = nfserr_layoutunavailable; 1416 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 1417 if (!ops) 1418 goto out; 1419 inode = d_inode(current_fh->fh_dentry); 1420 1421 nfserr = nfserr_inval; 1422 if (new_size <= seg->offset) { 1423 dprintk("pnfsd: last write before layout segment\n"); 1424 goto out; 1425 } 1426 if (new_size > seg->offset + seg->length) { 1427 dprintk("pnfsd: last write beyond layout segment\n"); 1428 goto out; 1429 } 1430 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 1431 dprintk("pnfsd: layoutcommit beyond EOF\n"); 1432 goto out; 1433 } 1434 1435 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 1436 false, lcp->lc_layout_type, 1437 &ls); 1438 if (nfserr) { 1439 trace_layout_commit_lookup_fail(&lcp->lc_sid); 1440 /* fixup error code as per RFC5661 */ 1441 if (nfserr == nfserr_bad_stateid) 1442 nfserr = nfserr_badlayout; 1443 goto out; 1444 } 1445 1446 /* LAYOUTCOMMIT does not require any serialization */ 1447 mutex_unlock(&ls->ls_mutex); 1448 1449 if (new_size > i_size_read(inode)) { 1450 lcp->lc_size_chg = 1; 1451 lcp->lc_newsize = new_size; 1452 } else { 1453 lcp->lc_size_chg = 0; 1454 } 1455 1456 nfserr = ops->proc_layoutcommit(inode, lcp); 1457 nfs4_put_stid(&ls->ls_stid); 1458 out: 1459 return nfserr; 1460 } 1461 1462 static __be32 1463 nfsd4_layoutreturn(struct svc_rqst *rqstp, 1464 struct nfsd4_compound_state *cstate, 1465 struct nfsd4_layoutreturn *lrp) 1466 { 1467 struct svc_fh *current_fh = &cstate->current_fh; 1468 __be32 nfserr; 1469 1470 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 1471 if (nfserr) 1472 goto out; 1473 1474 nfserr = nfserr_layoutunavailable; 1475 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 1476 goto out; 1477 1478 switch (lrp->lr_seg.iomode) { 1479 case IOMODE_READ: 1480 case IOMODE_RW: 1481 case IOMODE_ANY: 1482 break; 1483 default: 1484 dprintk("%s: invalid iomode %d\n", __func__, 1485 lrp->lr_seg.iomode); 1486 nfserr = nfserr_inval; 1487 goto out; 1488 } 1489 1490 switch (lrp->lr_return_type) { 1491 case RETURN_FILE: 1492 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 1493 break; 1494 case RETURN_FSID: 1495 case RETURN_ALL: 1496 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 1497 break; 1498 default: 1499 dprintk("%s: invalid return_type %d\n", __func__, 1500 lrp->lr_return_type); 1501 nfserr = nfserr_inval; 1502 break; 1503 } 1504 out: 1505 return nfserr; 1506 } 1507 #endif /* CONFIG_NFSD_PNFS */ 1508 1509 /* 1510 * NULL call. 1511 */ 1512 static __be32 1513 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1514 { 1515 return nfs_ok; 1516 } 1517 1518 static inline void nfsd4_increment_op_stats(u32 opnum) 1519 { 1520 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1521 nfsdstats.nfs4_opcount[opnum]++; 1522 } 1523 1524 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1525 void *); 1526 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1527 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1528 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1529 1530 enum nfsd4_op_flags { 1531 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1532 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1533 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1534 /* For rfc 5661 section 2.6.3.1.1: */ 1535 OP_HANDLES_WRONGSEC = 1 << 3, 1536 OP_IS_PUTFH_LIKE = 1 << 4, 1537 /* 1538 * These are the ops whose result size we estimate before 1539 * encoding, to avoid performing an op then not being able to 1540 * respond or cache a response. This includes writes and setattrs 1541 * as well as the operations usually called "nonidempotent": 1542 */ 1543 OP_MODIFIES_SOMETHING = 1 << 5, 1544 /* 1545 * Cache compounds containing these ops in the xid-based drc: 1546 * We use the DRC for compounds containing non-idempotent 1547 * operations, *except* those that are 4.1-specific (since 1548 * sessions provide their own EOS), and except for stateful 1549 * operations other than setclientid and setclientid_confirm 1550 * (since sequence numbers provide EOS for open, lock, etc in 1551 * the v4.0 case). 1552 */ 1553 OP_CACHEME = 1 << 6, 1554 /* 1555 * These are ops which clear current state id. 1556 */ 1557 OP_CLEAR_STATEID = 1 << 7, 1558 }; 1559 1560 struct nfsd4_operation { 1561 nfsd4op_func op_func; 1562 u32 op_flags; 1563 char *op_name; 1564 /* Try to get response size before operation */ 1565 nfsd4op_rsize op_rsize_bop; 1566 stateid_getter op_get_currentstateid; 1567 stateid_setter op_set_currentstateid; 1568 }; 1569 1570 static struct nfsd4_operation nfsd4_ops[]; 1571 1572 static const char *nfsd4_op_name(unsigned opnum); 1573 1574 /* 1575 * Enforce NFSv4.1 COMPOUND ordering rules: 1576 * 1577 * Also note, enforced elsewhere: 1578 * - SEQUENCE other than as first op results in 1579 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1580 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1581 * (Enforced in nfsd4_bind_conn_to_session().) 1582 * - DESTROY_SESSION must be the final operation in a compound, if 1583 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1584 * (Enforced in nfsd4_destroy_session().) 1585 */ 1586 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1587 { 1588 struct nfsd4_op *op = &args->ops[0]; 1589 1590 /* These ordering requirements don't apply to NFSv4.0: */ 1591 if (args->minorversion == 0) 1592 return nfs_ok; 1593 /* This is weird, but OK, not our problem: */ 1594 if (args->opcnt == 0) 1595 return nfs_ok; 1596 if (op->status == nfserr_op_illegal) 1597 return nfs_ok; 1598 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1599 return nfserr_op_not_in_session; 1600 if (op->opnum == OP_SEQUENCE) 1601 return nfs_ok; 1602 if (args->opcnt != 1) 1603 return nfserr_not_only_op; 1604 return nfs_ok; 1605 } 1606 1607 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1608 { 1609 return &nfsd4_ops[op->opnum]; 1610 } 1611 1612 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1613 { 1614 if (op->opnum == OP_ILLEGAL) 1615 return false; 1616 return OPDESC(op)->op_flags & OP_CACHEME; 1617 } 1618 1619 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1620 { 1621 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1622 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1623 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1624 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1625 struct nfsd4_operation *thisd; 1626 struct nfsd4_operation *nextd; 1627 1628 thisd = OPDESC(this); 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 struct nfsd4_compoundargs *args, 1678 struct nfsd4_compoundres *resp) 1679 { 1680 struct nfsd4_op *op; 1681 struct nfsd4_operation *opdesc; 1682 struct nfsd4_compound_state *cstate = &resp->cstate; 1683 struct svc_fh *current_fh = &cstate->current_fh; 1684 struct svc_fh *save_fh = &cstate->save_fh; 1685 __be32 status; 1686 1687 svcxdr_init_encode(rqstp, resp); 1688 resp->tagp = resp->xdr.p; 1689 /* reserve space for: taglen, tag, and opcnt */ 1690 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1691 resp->taglen = args->taglen; 1692 resp->tag = args->tag; 1693 resp->rqstp = rqstp; 1694 cstate->minorversion = args->minorversion; 1695 fh_init(current_fh, NFS4_FHSIZE); 1696 fh_init(save_fh, NFS4_FHSIZE); 1697 /* 1698 * Don't use the deferral mechanism for NFSv4; compounds make it 1699 * too hard to avoid non-idempotency problems. 1700 */ 1701 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1702 1703 /* 1704 * According to RFC3010, this takes precedence over all other errors. 1705 */ 1706 status = nfserr_minor_vers_mismatch; 1707 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1708 goto out; 1709 1710 status = nfs41_check_op_ordering(args); 1711 if (status) { 1712 op = &args->ops[0]; 1713 op->status = status; 1714 goto encode_op; 1715 } 1716 1717 while (!status && resp->opcnt < args->opcnt) { 1718 op = &args->ops[resp->opcnt++]; 1719 1720 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1721 resp->opcnt, args->opcnt, op->opnum, 1722 nfsd4_op_name(op->opnum)); 1723 /* 1724 * The XDR decode routines may have pre-set op->status; 1725 * for example, if there is a miscellaneous XDR error 1726 * it will be set to nfserr_bad_xdr. 1727 */ 1728 if (op->status) { 1729 if (op->opnum == OP_OPEN) 1730 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1731 goto encode_op; 1732 } 1733 1734 opdesc = OPDESC(op); 1735 1736 if (!current_fh->fh_dentry) { 1737 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1738 op->status = nfserr_nofilehandle; 1739 goto encode_op; 1740 } 1741 } else if (current_fh->fh_export->ex_fslocs.migrated && 1742 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1743 op->status = nfserr_moved; 1744 goto encode_op; 1745 } 1746 1747 fh_clear_wcc(current_fh); 1748 1749 /* If op is non-idempotent */ 1750 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1751 /* 1752 * Don't execute this op if we couldn't encode a 1753 * succesful reply: 1754 */ 1755 u32 plen = opdesc->op_rsize_bop(rqstp, op); 1756 /* 1757 * Plus if there's another operation, make sure 1758 * we'll have space to at least encode an error: 1759 */ 1760 if (resp->opcnt < args->opcnt) 1761 plen += COMPOUND_ERR_SLACK_SPACE; 1762 op->status = nfsd4_check_resp_size(resp, plen); 1763 } 1764 1765 if (op->status) 1766 goto encode_op; 1767 1768 if (opdesc->op_get_currentstateid) 1769 opdesc->op_get_currentstateid(cstate, &op->u); 1770 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1771 1772 if (!op->status) { 1773 if (opdesc->op_set_currentstateid) 1774 opdesc->op_set_currentstateid(cstate, &op->u); 1775 1776 if (opdesc->op_flags & OP_CLEAR_STATEID) 1777 clear_current_stateid(cstate); 1778 1779 if (need_wrongsec_check(rqstp)) 1780 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 1781 } 1782 1783 encode_op: 1784 /* Only from SEQUENCE */ 1785 if (cstate->status == nfserr_replay_cache) { 1786 dprintk("%s NFS4.1 replay from cache\n", __func__); 1787 status = op->status; 1788 goto out; 1789 } 1790 if (op->status == nfserr_replay_me) { 1791 op->replay = &cstate->replay_owner->so_replay; 1792 nfsd4_encode_replay(&resp->xdr, op); 1793 status = op->status = op->replay->rp_status; 1794 } else { 1795 nfsd4_encode_operation(resp, op); 1796 status = op->status; 1797 } 1798 1799 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1800 args->ops, args->opcnt, resp->opcnt, op->opnum, 1801 be32_to_cpu(status)); 1802 1803 nfsd4_cstate_clear_replay(cstate); 1804 nfsd4_increment_op_stats(op->opnum); 1805 } 1806 1807 cstate->status = status; 1808 fh_put(current_fh); 1809 fh_put(save_fh); 1810 BUG_ON(cstate->replay_owner); 1811 out: 1812 /* Reset deferral mechanism for RPC deferrals */ 1813 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1814 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1815 return status; 1816 } 1817 1818 #define op_encode_hdr_size (2) 1819 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1820 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1821 #define op_encode_change_info_maxsz (5) 1822 #define nfs4_fattr_bitmap_maxsz (4) 1823 1824 /* We'll fall back on returning no lockowner if run out of space: */ 1825 #define op_encode_lockowner_maxsz (0) 1826 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1827 1828 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1829 1830 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1831 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1832 op_encode_ace_maxsz) 1833 1834 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1835 1836 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1837 { 1838 return (op_encode_hdr_size) * sizeof(__be32); 1839 } 1840 1841 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1842 { 1843 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1844 } 1845 1846 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1847 { 1848 /* ac_supported, ac_resp_access */ 1849 return (op_encode_hdr_size + 2)* sizeof(__be32); 1850 } 1851 1852 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1853 { 1854 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1855 } 1856 1857 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1858 { 1859 return (op_encode_hdr_size + op_encode_change_info_maxsz 1860 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1861 } 1862 1863 /* 1864 * Note since this is an idempotent operation we won't insist on failing 1865 * the op prematurely if the estimate is too large. We may turn off splice 1866 * reads unnecessarily. 1867 */ 1868 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1869 struct nfsd4_op *op) 1870 { 1871 u32 *bmap = op->u.getattr.ga_bmval; 1872 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1873 u32 ret = 0; 1874 1875 if (bmap0 & FATTR4_WORD0_ACL) 1876 return svc_max_payload(rqstp); 1877 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1878 return svc_max_payload(rqstp); 1879 1880 if (bmap1 & FATTR4_WORD1_OWNER) { 1881 ret += IDMAP_NAMESZ + 4; 1882 bmap1 &= ~FATTR4_WORD1_OWNER; 1883 } 1884 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1885 ret += IDMAP_NAMESZ + 4; 1886 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1887 } 1888 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1889 ret += NFS4_FHSIZE + 4; 1890 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1891 } 1892 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1893 ret += NFS4_MAXLABELLEN + 12; 1894 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1895 } 1896 /* 1897 * Largest of remaining attributes are 16 bytes (e.g., 1898 * supported_attributes) 1899 */ 1900 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1901 /* bitmask, length */ 1902 ret += 20; 1903 return ret; 1904 } 1905 1906 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1907 { 1908 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE; 1909 } 1910 1911 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1912 { 1913 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1914 * sizeof(__be32); 1915 } 1916 1917 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1918 { 1919 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1920 * sizeof(__be32); 1921 } 1922 1923 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1924 { 1925 return (op_encode_hdr_size + op_encode_stateid_maxsz 1926 + op_encode_change_info_maxsz + 1 1927 + nfs4_fattr_bitmap_maxsz 1928 + op_encode_delegation_maxsz) * sizeof(__be32); 1929 } 1930 1931 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1932 { 1933 u32 maxcount = 0, rlen = 0; 1934 1935 maxcount = svc_max_payload(rqstp); 1936 rlen = min(op->u.read.rd_length, maxcount); 1937 1938 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1939 } 1940 1941 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1942 { 1943 u32 maxcount = 0, rlen = 0; 1944 1945 maxcount = svc_max_payload(rqstp); 1946 rlen = min(op->u.readdir.rd_maxcount, maxcount); 1947 1948 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1949 XDR_QUADLEN(rlen)) * sizeof(__be32); 1950 } 1951 1952 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1953 { 1954 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE; 1955 } 1956 1957 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1958 { 1959 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1960 * sizeof(__be32); 1961 } 1962 1963 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1964 { 1965 return (op_encode_hdr_size + op_encode_change_info_maxsz 1966 + op_encode_change_info_maxsz) * sizeof(__be32); 1967 } 1968 1969 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1970 struct nfsd4_op *op) 1971 { 1972 return (op_encode_hdr_size 1973 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 1974 } 1975 1976 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1977 { 1978 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids) 1979 * sizeof(__be32); 1980 } 1981 1982 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1983 { 1984 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1985 } 1986 1987 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1988 { 1989 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR * 1990 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32); 1991 } 1992 1993 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1994 { 1995 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1996 sizeof(__be32); 1997 } 1998 1999 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2000 { 2001 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 2002 } 2003 2004 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2005 { 2006 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 2007 1 + 1 + /* eir_flags, spr_how */\ 2008 4 + /* spo_must_enforce & _allow with bitmap */\ 2009 2 + /*eir_server_owner.so_minor_id */\ 2010 /* eir_server_owner.so_major_id<> */\ 2011 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2012 /* eir_server_scope<> */\ 2013 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2014 1 + /* eir_server_impl_id array length */\ 2015 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 2016 } 2017 2018 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2019 { 2020 return (op_encode_hdr_size + \ 2021 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 2022 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 2023 } 2024 2025 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2026 { 2027 return (op_encode_hdr_size + \ 2028 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 2029 2 + /* csr_sequence, csr_flags */\ 2030 op_encode_channel_attrs_maxsz + \ 2031 op_encode_channel_attrs_maxsz) * sizeof(__be32); 2032 } 2033 2034 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2035 { 2036 return (op_encode_hdr_size + 2037 1 /* wr_callback */ + 2038 op_encode_stateid_maxsz /* wr_callback */ + 2039 2 /* wr_count */ + 2040 1 /* wr_committed */ + 2041 op_encode_verifier_maxsz + 2042 1 /* cr_consecutive */ + 2043 1 /* cr_synchronous */) * sizeof(__be32); 2044 } 2045 2046 #ifdef CONFIG_NFSD_PNFS 2047 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2048 { 2049 u32 maxcount = 0, rlen = 0; 2050 2051 maxcount = svc_max_payload(rqstp); 2052 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount); 2053 2054 return (op_encode_hdr_size + 2055 1 /* gd_layout_type*/ + 2056 XDR_QUADLEN(rlen) + 2057 2 /* gd_notify_types */) * sizeof(__be32); 2058 } 2059 2060 /* 2061 * At this stage we don't really know what layout driver will handle the request, 2062 * so we need to define an arbitrary upper bound here. 2063 */ 2064 #define MAX_LAYOUT_SIZE 128 2065 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2066 { 2067 return (op_encode_hdr_size + 2068 1 /* logr_return_on_close */ + 2069 op_encode_stateid_maxsz + 2070 1 /* nr of layouts */ + 2071 MAX_LAYOUT_SIZE) * sizeof(__be32); 2072 } 2073 2074 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2075 { 2076 return (op_encode_hdr_size + 2077 1 /* locr_newsize */ + 2078 2 /* ns_size */) * sizeof(__be32); 2079 } 2080 2081 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2082 { 2083 return (op_encode_hdr_size + 2084 1 /* lrs_stateid */ + 2085 op_encode_stateid_maxsz) * sizeof(__be32); 2086 } 2087 #endif /* CONFIG_NFSD_PNFS */ 2088 2089 2090 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2091 { 2092 return (op_encode_hdr_size + 3) * sizeof(__be32); 2093 } 2094 2095 static struct nfsd4_operation nfsd4_ops[] = { 2096 [OP_ACCESS] = { 2097 .op_func = (nfsd4op_func)nfsd4_access, 2098 .op_name = "OP_ACCESS", 2099 .op_rsize_bop = (nfsd4op_rsize)nfsd4_access_rsize, 2100 }, 2101 [OP_CLOSE] = { 2102 .op_func = (nfsd4op_func)nfsd4_close, 2103 .op_flags = OP_MODIFIES_SOMETHING, 2104 .op_name = "OP_CLOSE", 2105 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2106 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 2107 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 2108 }, 2109 [OP_COMMIT] = { 2110 .op_func = (nfsd4op_func)nfsd4_commit, 2111 .op_flags = OP_MODIFIES_SOMETHING, 2112 .op_name = "OP_COMMIT", 2113 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 2114 }, 2115 [OP_CREATE] = { 2116 .op_func = (nfsd4op_func)nfsd4_create, 2117 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2118 .op_name = "OP_CREATE", 2119 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 2120 }, 2121 [OP_DELEGRETURN] = { 2122 .op_func = (nfsd4op_func)nfsd4_delegreturn, 2123 .op_flags = OP_MODIFIES_SOMETHING, 2124 .op_name = "OP_DELEGRETURN", 2125 .op_rsize_bop = nfsd4_only_status_rsize, 2126 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 2127 }, 2128 [OP_GETATTR] = { 2129 .op_func = (nfsd4op_func)nfsd4_getattr, 2130 .op_flags = ALLOWED_ON_ABSENT_FS, 2131 .op_rsize_bop = nfsd4_getattr_rsize, 2132 .op_name = "OP_GETATTR", 2133 }, 2134 [OP_GETFH] = { 2135 .op_func = (nfsd4op_func)nfsd4_getfh, 2136 .op_name = "OP_GETFH", 2137 .op_rsize_bop = (nfsd4op_rsize)nfsd4_getfh_rsize, 2138 }, 2139 [OP_LINK] = { 2140 .op_func = (nfsd4op_func)nfsd4_link, 2141 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2142 | OP_CACHEME, 2143 .op_name = "OP_LINK", 2144 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 2145 }, 2146 [OP_LOCK] = { 2147 .op_func = (nfsd4op_func)nfsd4_lock, 2148 .op_flags = OP_MODIFIES_SOMETHING, 2149 .op_name = "OP_LOCK", 2150 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 2151 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 2152 }, 2153 [OP_LOCKT] = { 2154 .op_func = (nfsd4op_func)nfsd4_lockt, 2155 .op_name = "OP_LOCKT", 2156 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 2157 }, 2158 [OP_LOCKU] = { 2159 .op_func = (nfsd4op_func)nfsd4_locku, 2160 .op_flags = OP_MODIFIES_SOMETHING, 2161 .op_name = "OP_LOCKU", 2162 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2163 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 2164 }, 2165 [OP_LOOKUP] = { 2166 .op_func = (nfsd4op_func)nfsd4_lookup, 2167 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2168 .op_name = "OP_LOOKUP", 2169 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2170 }, 2171 [OP_LOOKUPP] = { 2172 .op_func = (nfsd4op_func)nfsd4_lookupp, 2173 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2174 .op_name = "OP_LOOKUPP", 2175 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2176 }, 2177 [OP_NVERIFY] = { 2178 .op_func = (nfsd4op_func)nfsd4_nverify, 2179 .op_name = "OP_NVERIFY", 2180 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2181 }, 2182 [OP_OPEN] = { 2183 .op_func = (nfsd4op_func)nfsd4_open, 2184 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2185 .op_name = "OP_OPEN", 2186 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 2187 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 2188 }, 2189 [OP_OPEN_CONFIRM] = { 2190 .op_func = (nfsd4op_func)nfsd4_open_confirm, 2191 .op_flags = OP_MODIFIES_SOMETHING, 2192 .op_name = "OP_OPEN_CONFIRM", 2193 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2194 }, 2195 [OP_OPEN_DOWNGRADE] = { 2196 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 2197 .op_flags = OP_MODIFIES_SOMETHING, 2198 .op_name = "OP_OPEN_DOWNGRADE", 2199 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2200 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 2201 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 2202 }, 2203 [OP_PUTFH] = { 2204 .op_func = (nfsd4op_func)nfsd4_putfh, 2205 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2206 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2207 .op_name = "OP_PUTFH", 2208 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2209 }, 2210 [OP_PUTPUBFH] = { 2211 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2212 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2213 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2214 .op_name = "OP_PUTPUBFH", 2215 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2216 }, 2217 [OP_PUTROOTFH] = { 2218 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2219 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2220 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2221 .op_name = "OP_PUTROOTFH", 2222 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2223 }, 2224 [OP_READ] = { 2225 .op_func = (nfsd4op_func)nfsd4_read, 2226 .op_name = "OP_READ", 2227 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 2228 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 2229 }, 2230 [OP_READDIR] = { 2231 .op_func = (nfsd4op_func)nfsd4_readdir, 2232 .op_name = "OP_READDIR", 2233 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 2234 }, 2235 [OP_READLINK] = { 2236 .op_func = (nfsd4op_func)nfsd4_readlink, 2237 .op_name = "OP_READLINK", 2238 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readlink_rsize, 2239 }, 2240 [OP_REMOVE] = { 2241 .op_func = (nfsd4op_func)nfsd4_remove, 2242 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2243 .op_name = "OP_REMOVE", 2244 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 2245 }, 2246 [OP_RENAME] = { 2247 .op_func = (nfsd4op_func)nfsd4_rename, 2248 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2249 .op_name = "OP_RENAME", 2250 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 2251 }, 2252 [OP_RENEW] = { 2253 .op_func = (nfsd4op_func)nfsd4_renew, 2254 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2255 | OP_MODIFIES_SOMETHING, 2256 .op_name = "OP_RENEW", 2257 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2258 2259 }, 2260 [OP_RESTOREFH] = { 2261 .op_func = (nfsd4op_func)nfsd4_restorefh, 2262 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2263 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2264 .op_name = "OP_RESTOREFH", 2265 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2266 }, 2267 [OP_SAVEFH] = { 2268 .op_func = (nfsd4op_func)nfsd4_savefh, 2269 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2270 .op_name = "OP_SAVEFH", 2271 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2272 }, 2273 [OP_SECINFO] = { 2274 .op_func = (nfsd4op_func)nfsd4_secinfo, 2275 .op_flags = OP_HANDLES_WRONGSEC, 2276 .op_name = "OP_SECINFO", 2277 .op_rsize_bop = (nfsd4op_rsize)nfsd4_secinfo_rsize, 2278 }, 2279 [OP_SETATTR] = { 2280 .op_func = (nfsd4op_func)nfsd4_setattr, 2281 .op_name = "OP_SETATTR", 2282 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2283 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 2284 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 2285 }, 2286 [OP_SETCLIENTID] = { 2287 .op_func = (nfsd4op_func)nfsd4_setclientid, 2288 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2289 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2290 .op_name = "OP_SETCLIENTID", 2291 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 2292 }, 2293 [OP_SETCLIENTID_CONFIRM] = { 2294 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 2295 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2296 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2297 .op_name = "OP_SETCLIENTID_CONFIRM", 2298 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2299 }, 2300 [OP_VERIFY] = { 2301 .op_func = (nfsd4op_func)nfsd4_verify, 2302 .op_name = "OP_VERIFY", 2303 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2304 }, 2305 [OP_WRITE] = { 2306 .op_func = (nfsd4op_func)nfsd4_write, 2307 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2308 .op_name = "OP_WRITE", 2309 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 2310 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 2311 }, 2312 [OP_RELEASE_LOCKOWNER] = { 2313 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 2314 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2315 | OP_MODIFIES_SOMETHING, 2316 .op_name = "OP_RELEASE_LOCKOWNER", 2317 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2318 }, 2319 2320 /* NFSv4.1 operations */ 2321 [OP_EXCHANGE_ID] = { 2322 .op_func = (nfsd4op_func)nfsd4_exchange_id, 2323 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2324 | OP_MODIFIES_SOMETHING, 2325 .op_name = "OP_EXCHANGE_ID", 2326 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 2327 }, 2328 [OP_BACKCHANNEL_CTL] = { 2329 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 2330 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2331 .op_name = "OP_BACKCHANNEL_CTL", 2332 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2333 }, 2334 [OP_BIND_CONN_TO_SESSION] = { 2335 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 2336 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2337 | OP_MODIFIES_SOMETHING, 2338 .op_name = "OP_BIND_CONN_TO_SESSION", 2339 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 2340 }, 2341 [OP_CREATE_SESSION] = { 2342 .op_func = (nfsd4op_func)nfsd4_create_session, 2343 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2344 | OP_MODIFIES_SOMETHING, 2345 .op_name = "OP_CREATE_SESSION", 2346 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 2347 }, 2348 [OP_DESTROY_SESSION] = { 2349 .op_func = (nfsd4op_func)nfsd4_destroy_session, 2350 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2351 | OP_MODIFIES_SOMETHING, 2352 .op_name = "OP_DESTROY_SESSION", 2353 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2354 }, 2355 [OP_SEQUENCE] = { 2356 .op_func = (nfsd4op_func)nfsd4_sequence, 2357 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 2358 .op_name = "OP_SEQUENCE", 2359 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize, 2360 }, 2361 [OP_DESTROY_CLIENTID] = { 2362 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 2363 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2364 | OP_MODIFIES_SOMETHING, 2365 .op_name = "OP_DESTROY_CLIENTID", 2366 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2367 }, 2368 [OP_RECLAIM_COMPLETE] = { 2369 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 2370 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2371 .op_name = "OP_RECLAIM_COMPLETE", 2372 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2373 }, 2374 [OP_SECINFO_NO_NAME] = { 2375 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 2376 .op_flags = OP_HANDLES_WRONGSEC, 2377 .op_name = "OP_SECINFO_NO_NAME", 2378 .op_rsize_bop = (nfsd4op_rsize)nfsd4_secinfo_rsize, 2379 }, 2380 [OP_TEST_STATEID] = { 2381 .op_func = (nfsd4op_func)nfsd4_test_stateid, 2382 .op_flags = ALLOWED_WITHOUT_FH, 2383 .op_name = "OP_TEST_STATEID", 2384 .op_rsize_bop = (nfsd4op_rsize)nfsd4_test_stateid_rsize, 2385 }, 2386 [OP_FREE_STATEID] = { 2387 .op_func = (nfsd4op_func)nfsd4_free_stateid, 2388 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2389 .op_name = "OP_FREE_STATEID", 2390 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 2391 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2392 }, 2393 #ifdef CONFIG_NFSD_PNFS 2394 [OP_GETDEVICEINFO] = { 2395 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo, 2396 .op_flags = ALLOWED_WITHOUT_FH, 2397 .op_name = "OP_GETDEVICEINFO", 2398 .op_rsize_bop = (nfsd4op_rsize)nfsd4_getdeviceinfo_rsize, 2399 }, 2400 [OP_LAYOUTGET] = { 2401 .op_func = (nfsd4op_func)nfsd4_layoutget, 2402 .op_flags = OP_MODIFIES_SOMETHING, 2403 .op_name = "OP_LAYOUTGET", 2404 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize, 2405 }, 2406 [OP_LAYOUTCOMMIT] = { 2407 .op_func = (nfsd4op_func)nfsd4_layoutcommit, 2408 .op_flags = OP_MODIFIES_SOMETHING, 2409 .op_name = "OP_LAYOUTCOMMIT", 2410 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize, 2411 }, 2412 [OP_LAYOUTRETURN] = { 2413 .op_func = (nfsd4op_func)nfsd4_layoutreturn, 2414 .op_flags = OP_MODIFIES_SOMETHING, 2415 .op_name = "OP_LAYOUTRETURN", 2416 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize, 2417 }, 2418 #endif /* CONFIG_NFSD_PNFS */ 2419 2420 /* NFSv4.2 operations */ 2421 [OP_ALLOCATE] = { 2422 .op_func = (nfsd4op_func)nfsd4_allocate, 2423 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2424 .op_name = "OP_ALLOCATE", 2425 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2426 }, 2427 [OP_DEALLOCATE] = { 2428 .op_func = (nfsd4op_func)nfsd4_deallocate, 2429 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2430 .op_name = "OP_DEALLOCATE", 2431 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2432 }, 2433 [OP_CLONE] = { 2434 .op_func = (nfsd4op_func)nfsd4_clone, 2435 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2436 .op_name = "OP_CLONE", 2437 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2438 }, 2439 [OP_COPY] = { 2440 .op_func = (nfsd4op_func)nfsd4_copy, 2441 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2442 .op_name = "OP_COPY", 2443 .op_rsize_bop = (nfsd4op_rsize)nfsd4_copy_rsize, 2444 }, 2445 [OP_SEEK] = { 2446 .op_func = (nfsd4op_func)nfsd4_seek, 2447 .op_name = "OP_SEEK", 2448 .op_rsize_bop = (nfsd4op_rsize)nfsd4_seek_rsize, 2449 }, 2450 }; 2451 2452 /** 2453 * nfsd4_spo_must_allow - Determine if the compound op contains an 2454 * operation that is allowed to be sent with machine credentials 2455 * 2456 * @rqstp: a pointer to the struct svc_rqst 2457 * 2458 * Checks to see if the compound contains a spo_must_allow op 2459 * and confirms that it was sent with the proper machine creds. 2460 */ 2461 2462 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 2463 { 2464 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2465 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2466 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2467 struct nfsd4_compound_state *cstate = &resp->cstate; 2468 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 2469 u32 opiter; 2470 2471 if (!cstate->minorversion) 2472 return false; 2473 2474 if (cstate->spo_must_allowed == true) 2475 return true; 2476 2477 opiter = resp->opcnt; 2478 while (opiter < argp->opcnt) { 2479 this = &argp->ops[opiter++]; 2480 if (test_bit(this->opnum, allow->u.longs) && 2481 cstate->clp->cl_mach_cred && 2482 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 2483 cstate->spo_must_allowed = true; 2484 return true; 2485 } 2486 } 2487 cstate->spo_must_allowed = false; 2488 return false; 2489 } 2490 2491 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 2492 { 2493 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp) 2494 return op_encode_hdr_size * sizeof(__be32); 2495 2496 BUG_ON(OPDESC(op)->op_rsize_bop == NULL); 2497 return OPDESC(op)->op_rsize_bop(rqstp, op); 2498 } 2499 2500 void warn_on_nonidempotent_op(struct nfsd4_op *op) 2501 { 2502 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 2503 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 2504 op->opnum, nfsd4_op_name(op->opnum)); 2505 WARN_ON_ONCE(1); 2506 } 2507 } 2508 2509 static const char *nfsd4_op_name(unsigned opnum) 2510 { 2511 if (opnum < ARRAY_SIZE(nfsd4_ops)) 2512 return nfsd4_ops[opnum].op_name; 2513 return "unknown_operation"; 2514 } 2515 2516 #define nfsd4_voidres nfsd4_voidargs 2517 struct nfsd4_voidargs { int dummy; }; 2518 2519 static struct svc_procedure nfsd_procedures4[2] = { 2520 [NFSPROC4_NULL] = { 2521 .pc_func = (svc_procfunc) nfsd4_proc_null, 2522 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 2523 .pc_argsize = sizeof(struct nfsd4_voidargs), 2524 .pc_ressize = sizeof(struct nfsd4_voidres), 2525 .pc_cachetype = RC_NOCACHE, 2526 .pc_xdrressize = 1, 2527 }, 2528 [NFSPROC4_COMPOUND] = { 2529 .pc_func = (svc_procfunc) nfsd4_proc_compound, 2530 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 2531 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 2532 .pc_argsize = sizeof(struct nfsd4_compoundargs), 2533 .pc_ressize = sizeof(struct nfsd4_compoundres), 2534 .pc_release = nfsd4_release_compoundargs, 2535 .pc_cachetype = RC_NOCACHE, 2536 .pc_xdrressize = NFSD_BUFSIZE/4, 2537 }, 2538 }; 2539 2540 struct svc_version nfsd_version4 = { 2541 .vs_vers = 4, 2542 .vs_nproc = 2, 2543 .vs_proc = nfsd_procedures4, 2544 .vs_dispatch = nfsd_dispatch, 2545 .vs_xdrsize = NFS4_SVC_XDRSIZE, 2546 .vs_rpcb_optnl = true, 2547 .vs_need_cong_ctrl = true, 2548 }; 2549 2550 /* 2551 * Local variables: 2552 * c-basic-offset: 8 2553 * End: 2554 */ 2555