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 47 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 48 #include <linux/security.h> 49 50 static inline void 51 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 52 { 53 struct inode *inode = resfh->fh_dentry->d_inode; 54 int status; 55 56 mutex_lock(&inode->i_mutex); 57 status = security_inode_setsecctx(resfh->fh_dentry, 58 label->data, label->len); 59 mutex_unlock(&inode->i_mutex); 60 61 if (status) 62 /* 63 * XXX: We should really fail the whole open, but we may 64 * already have created a new file, so it may be too 65 * late. For now this seems the least of evils: 66 */ 67 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 68 69 return; 70 } 71 #else 72 static inline void 73 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 74 { } 75 #endif 76 77 #define NFSDDBG_FACILITY NFSDDBG_PROC 78 79 static u32 nfsd_attrmask[] = { 80 NFSD_WRITEABLE_ATTRS_WORD0, 81 NFSD_WRITEABLE_ATTRS_WORD1, 82 NFSD_WRITEABLE_ATTRS_WORD2 83 }; 84 85 static u32 nfsd41_ex_attrmask[] = { 86 NFSD_SUPPATTR_EXCLCREAT_WORD0, 87 NFSD_SUPPATTR_EXCLCREAT_WORD1, 88 NFSD_SUPPATTR_EXCLCREAT_WORD2 89 }; 90 91 static __be32 92 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 93 u32 *bmval, u32 *writable) 94 { 95 struct dentry *dentry = cstate->current_fh.fh_dentry; 96 97 /* 98 * Check about attributes are supported by the NFSv4 server or not. 99 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. 100 */ 101 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || 102 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || 103 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) 104 return nfserr_attrnotsupp; 105 106 /* 107 * Check FATTR4_WORD0_ACL can be supported 108 * in current environment or not. 109 */ 110 if (bmval[0] & FATTR4_WORD0_ACL) { 111 if (!IS_POSIXACL(dentry->d_inode)) 112 return nfserr_attrnotsupp; 113 } 114 115 /* 116 * According to spec, read-only attributes return ERR_INVAL. 117 */ 118 if (writable) { 119 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || 120 (bmval[2] & ~writable[2])) 121 return nfserr_inval; 122 } 123 124 return nfs_ok; 125 } 126 127 static __be32 128 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 129 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 130 { 131 __be32 status = nfs_ok; 132 133 if (open->op_create == NFS4_OPEN_CREATE) { 134 if (open->op_createmode == NFS4_CREATE_UNCHECKED 135 || open->op_createmode == NFS4_CREATE_GUARDED) 136 status = check_attr_support(rqstp, cstate, 137 open->op_bmval, nfsd_attrmask); 138 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 139 status = check_attr_support(rqstp, cstate, 140 open->op_bmval, nfsd41_ex_attrmask); 141 } 142 143 return status; 144 } 145 146 static int 147 is_create_with_attrs(struct nfsd4_open *open) 148 { 149 return open->op_create == NFS4_OPEN_CREATE 150 && (open->op_createmode == NFS4_CREATE_UNCHECKED 151 || open->op_createmode == NFS4_CREATE_GUARDED 152 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 153 } 154 155 /* 156 * if error occurs when setting the acl, just clear the acl bit 157 * in the returned attr bitmap. 158 */ 159 static void 160 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 161 struct nfs4_acl *acl, u32 *bmval) 162 { 163 __be32 status; 164 165 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 166 if (status) 167 /* 168 * We should probably fail the whole open at this point, 169 * but we've already created the file, so it's too late; 170 * So this seems the least of evils: 171 */ 172 bmval[0] &= ~FATTR4_WORD0_ACL; 173 } 174 175 static inline void 176 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 177 { 178 fh_put(dst); 179 dget(src->fh_dentry); 180 if (src->fh_export) 181 exp_get(src->fh_export); 182 *dst = *src; 183 } 184 185 static __be32 186 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 187 { 188 __be32 status; 189 190 if (open->op_truncate && 191 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 192 return nfserr_inval; 193 194 accmode |= NFSD_MAY_READ_IF_EXEC; 195 196 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 197 accmode |= NFSD_MAY_READ; 198 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 199 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 200 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 201 accmode |= NFSD_MAY_WRITE; 202 203 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 204 205 return status; 206 } 207 208 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 209 { 210 umode_t mode = fh->fh_dentry->d_inode->i_mode; 211 212 if (S_ISREG(mode)) 213 return nfs_ok; 214 if (S_ISDIR(mode)) 215 return nfserr_isdir; 216 /* 217 * Using err_symlink as our catch-all case may look odd; but 218 * there's no other obvious error for this case in 4.0, and we 219 * happen to know that it will cause the linux v4 client to do 220 * the right thing on attempts to open something other than a 221 * regular file. 222 */ 223 return nfserr_symlink; 224 } 225 226 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 227 { 228 if (nfsd4_has_session(cstate)) 229 return; 230 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 231 &resfh->fh_handle); 232 } 233 234 static __be32 235 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) 236 { 237 struct svc_fh *current_fh = &cstate->current_fh; 238 int accmode; 239 __be32 status; 240 241 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 242 if (!*resfh) 243 return nfserr_jukebox; 244 fh_init(*resfh, NFS4_FHSIZE); 245 open->op_truncate = 0; 246 247 if (open->op_create) { 248 /* FIXME: check session persistence and pnfs flags. 249 * The nfsv4.1 spec requires the following semantics: 250 * 251 * Persistent | pNFS | Server REQUIRED | Client Allowed 252 * Reply Cache | server | | 253 * -------------+--------+-----------------+-------------------- 254 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 255 * | | | (SHOULD) 256 * | | and EXCLUSIVE4 | or EXCLUSIVE4 257 * | | | (SHOULD NOT) 258 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 259 * yes | no | GUARDED4 | GUARDED4 260 * yes | yes | GUARDED4 | GUARDED4 261 */ 262 263 /* 264 * Note: create modes (UNCHECKED,GUARDED...) are the same 265 * in NFSv4 as in v3 except EXCLUSIVE4_1. 266 */ 267 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, 268 open->op_fname.len, &open->op_iattr, 269 *resfh, open->op_createmode, 270 (u32 *)open->op_verf.data, 271 &open->op_truncate, &open->op_created); 272 273 if (!status && open->op_label.len) 274 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); 275 276 /* 277 * Following rfc 3530 14.2.16, use the returned bitmask 278 * to indicate which attributes we used to store the 279 * verifier: 280 */ 281 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) 282 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | 283 FATTR4_WORD1_TIME_MODIFY); 284 } else 285 /* 286 * Note this may exit with the parent still locked. 287 * We will hold the lock until nfsd4_open's final 288 * lookup, to prevent renames or unlinks until we've had 289 * a chance to an acquire a delegation if appropriate. 290 */ 291 status = nfsd_lookup(rqstp, current_fh, 292 open->op_fname.data, open->op_fname.len, *resfh); 293 if (status) 294 goto out; 295 status = nfsd_check_obj_isreg(*resfh); 296 if (status) 297 goto out; 298 299 if (is_create_with_attrs(open) && open->op_acl != NULL) 300 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); 301 302 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); 303 accmode = NFSD_MAY_NOP; 304 if (open->op_created || 305 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 306 accmode |= NFSD_MAY_OWNER_OVERRIDE; 307 status = do_open_permission(rqstp, *resfh, open, accmode); 308 set_change_info(&open->op_cinfo, current_fh); 309 out: 310 return status; 311 } 312 313 static __be32 314 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 315 { 316 struct svc_fh *current_fh = &cstate->current_fh; 317 __be32 status; 318 int accmode = 0; 319 320 /* We don't know the target directory, and therefore can not 321 * set the change info 322 */ 323 324 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 325 326 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 327 328 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 329 (open->op_iattr.ia_size == 0); 330 /* 331 * In the delegation case, the client is telling us about an 332 * open that it *already* performed locally, some time ago. We 333 * should let it succeed now if possible. 334 * 335 * In the case of a CLAIM_FH open, on the other hand, the client 336 * may be counting on us to enforce permissions (the Linux 4.1 337 * client uses this for normal opens, for example). 338 */ 339 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 340 accmode = NFSD_MAY_OWNER_OVERRIDE; 341 342 status = do_open_permission(rqstp, current_fh, open, accmode); 343 344 return status; 345 } 346 347 static void 348 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 349 { 350 struct nfsd4_sessionid *sid = 351 (struct nfsd4_sessionid *)session->se_sessionid.data; 352 353 clid->cl_boot = sid->clientid.cl_boot; 354 clid->cl_id = sid->clientid.cl_id; 355 } 356 357 static __be32 358 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 359 struct nfsd4_open *open) 360 { 361 __be32 status; 362 struct svc_fh *resfh = NULL; 363 struct nfsd4_compoundres *resp; 364 struct net *net = SVC_NET(rqstp); 365 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 366 367 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 368 (int)open->op_fname.len, open->op_fname.data, 369 open->op_openowner); 370 371 /* This check required by spec. */ 372 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 373 return nfserr_inval; 374 375 open->op_created = 0; 376 /* 377 * RFC5661 18.51.3 378 * Before RECLAIM_COMPLETE done, server should deny new lock 379 */ 380 if (nfsd4_has_session(cstate) && 381 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 382 &cstate->session->se_client->cl_flags) && 383 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 384 return nfserr_grace; 385 386 if (nfsd4_has_session(cstate)) 387 copy_clientid(&open->op_clientid, cstate->session); 388 389 /* check seqid for replay. set nfs4_owner */ 390 resp = rqstp->rq_resp; 391 status = nfsd4_process_open1(&resp->cstate, open, nn); 392 if (status == nfserr_replay_me) { 393 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 394 fh_put(&cstate->current_fh); 395 fh_copy_shallow(&cstate->current_fh.fh_handle, 396 &rp->rp_openfh); 397 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 398 if (status) 399 dprintk("nfsd4_open: replay failed" 400 " restoring previous filehandle\n"); 401 else 402 status = nfserr_replay_me; 403 } 404 if (status) 405 goto out; 406 if (open->op_xdr_error) { 407 status = open->op_xdr_error; 408 goto out; 409 } 410 411 status = nfsd4_check_open_attributes(rqstp, cstate, open); 412 if (status) 413 goto out; 414 415 /* Openowner is now set, so sequence id will get bumped. Now we need 416 * these checks before we do any creates: */ 417 status = nfserr_grace; 418 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 419 goto out; 420 status = nfserr_no_grace; 421 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 422 goto out; 423 424 switch (open->op_claim_type) { 425 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 426 case NFS4_OPEN_CLAIM_NULL: 427 status = do_open_lookup(rqstp, cstate, open, &resfh); 428 if (status) 429 goto out; 430 break; 431 case NFS4_OPEN_CLAIM_PREVIOUS: 432 status = nfs4_check_open_reclaim(&open->op_clientid, 433 cstate, nn); 434 if (status) 435 goto out; 436 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 437 case NFS4_OPEN_CLAIM_FH: 438 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 439 status = do_open_fhandle(rqstp, cstate, open); 440 if (status) 441 goto out; 442 resfh = &cstate->current_fh; 443 break; 444 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 445 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 446 dprintk("NFSD: unsupported OPEN claim type %d\n", 447 open->op_claim_type); 448 status = nfserr_notsupp; 449 goto out; 450 default: 451 dprintk("NFSD: Invalid OPEN claim type %d\n", 452 open->op_claim_type); 453 status = nfserr_inval; 454 goto out; 455 } 456 /* 457 * nfsd4_process_open2() does the actual opening of the file. If 458 * successful, it (1) truncates the file if open->op_truncate was 459 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 460 */ 461 status = nfsd4_process_open2(rqstp, resfh, open); 462 WARN(status && open->op_created, 463 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 464 be32_to_cpu(status)); 465 out: 466 if (resfh && resfh != &cstate->current_fh) { 467 fh_dup2(&cstate->current_fh, resfh); 468 fh_put(resfh); 469 kfree(resfh); 470 } 471 nfsd4_cleanup_open_state(cstate, open, status); 472 nfsd4_bump_seqid(cstate, status); 473 return status; 474 } 475 476 /* 477 * OPEN is the only seqid-mutating operation whose decoding can fail 478 * with a seqid-mutating error (specifically, decoding of user names in 479 * the attributes). Therefore we have to do some processing to look up 480 * the stateowner so that we can bump the seqid. 481 */ 482 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 483 { 484 struct nfsd4_open *open = (struct nfsd4_open *)&op->u; 485 486 if (!seqid_mutating_err(ntohl(op->status))) 487 return op->status; 488 if (nfsd4_has_session(cstate)) 489 return op->status; 490 open->op_xdr_error = op->status; 491 return nfsd4_open(rqstp, cstate, open); 492 } 493 494 /* 495 * filehandle-manipulating ops. 496 */ 497 static __be32 498 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 499 struct svc_fh **getfh) 500 { 501 if (!cstate->current_fh.fh_dentry) 502 return nfserr_nofilehandle; 503 504 *getfh = &cstate->current_fh; 505 return nfs_ok; 506 } 507 508 static __be32 509 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 510 struct nfsd4_putfh *putfh) 511 { 512 fh_put(&cstate->current_fh); 513 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 514 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 515 putfh->pf_fhlen); 516 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 517 } 518 519 static __be32 520 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 521 void *arg) 522 { 523 __be32 status; 524 525 fh_put(&cstate->current_fh); 526 status = exp_pseudoroot(rqstp, &cstate->current_fh); 527 return status; 528 } 529 530 static __be32 531 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 532 void *arg) 533 { 534 if (!cstate->save_fh.fh_dentry) 535 return nfserr_restorefh; 536 537 fh_dup2(&cstate->current_fh, &cstate->save_fh); 538 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 539 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 540 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 541 } 542 return nfs_ok; 543 } 544 545 static __be32 546 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 547 void *arg) 548 { 549 if (!cstate->current_fh.fh_dentry) 550 return nfserr_nofilehandle; 551 552 fh_dup2(&cstate->save_fh, &cstate->current_fh); 553 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 554 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 555 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 556 } 557 return nfs_ok; 558 } 559 560 /* 561 * misc nfsv4 ops 562 */ 563 static __be32 564 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 565 struct nfsd4_access *access) 566 { 567 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 568 return nfserr_inval; 569 570 access->ac_resp_access = access->ac_req_access; 571 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 572 &access->ac_supported); 573 } 574 575 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 576 { 577 __be32 verf[2]; 578 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 579 580 /* 581 * This is opaque to client, so no need to byte-swap. Use 582 * __force to keep sparse happy 583 */ 584 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec; 585 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec; 586 memcpy(verifier->data, verf, sizeof(verifier->data)); 587 } 588 589 static __be32 590 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 591 struct nfsd4_commit *commit) 592 { 593 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 594 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 595 commit->co_count); 596 } 597 598 static __be32 599 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 600 struct nfsd4_create *create) 601 { 602 struct svc_fh resfh; 603 __be32 status; 604 dev_t rdev; 605 606 fh_init(&resfh, NFS4_FHSIZE); 607 608 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 609 NFSD_MAY_CREATE); 610 if (status) 611 return status; 612 613 status = check_attr_support(rqstp, cstate, create->cr_bmval, 614 nfsd_attrmask); 615 if (status) 616 return status; 617 618 switch (create->cr_type) { 619 case NF4LNK: 620 status = nfsd_symlink(rqstp, &cstate->current_fh, 621 create->cr_name, create->cr_namelen, 622 create->cr_data, &resfh); 623 break; 624 625 case NF4BLK: 626 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 627 if (MAJOR(rdev) != create->cr_specdata1 || 628 MINOR(rdev) != create->cr_specdata2) 629 return nfserr_inval; 630 status = nfsd_create(rqstp, &cstate->current_fh, 631 create->cr_name, create->cr_namelen, 632 &create->cr_iattr, S_IFBLK, rdev, &resfh); 633 break; 634 635 case NF4CHR: 636 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 637 if (MAJOR(rdev) != create->cr_specdata1 || 638 MINOR(rdev) != create->cr_specdata2) 639 return nfserr_inval; 640 status = nfsd_create(rqstp, &cstate->current_fh, 641 create->cr_name, create->cr_namelen, 642 &create->cr_iattr,S_IFCHR, rdev, &resfh); 643 break; 644 645 case NF4SOCK: 646 status = nfsd_create(rqstp, &cstate->current_fh, 647 create->cr_name, create->cr_namelen, 648 &create->cr_iattr, S_IFSOCK, 0, &resfh); 649 break; 650 651 case NF4FIFO: 652 status = nfsd_create(rqstp, &cstate->current_fh, 653 create->cr_name, create->cr_namelen, 654 &create->cr_iattr, S_IFIFO, 0, &resfh); 655 break; 656 657 case NF4DIR: 658 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 659 status = nfsd_create(rqstp, &cstate->current_fh, 660 create->cr_name, create->cr_namelen, 661 &create->cr_iattr, S_IFDIR, 0, &resfh); 662 break; 663 664 default: 665 status = nfserr_badtype; 666 } 667 668 if (status) 669 goto out; 670 671 if (create->cr_label.len) 672 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 673 674 if (create->cr_acl != NULL) 675 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 676 create->cr_bmval); 677 678 fh_unlock(&cstate->current_fh); 679 set_change_info(&create->cr_cinfo, &cstate->current_fh); 680 fh_dup2(&cstate->current_fh, &resfh); 681 out: 682 fh_put(&resfh); 683 return status; 684 } 685 686 static __be32 687 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 688 struct nfsd4_getattr *getattr) 689 { 690 __be32 status; 691 692 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 693 if (status) 694 return status; 695 696 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 697 return nfserr_inval; 698 699 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 700 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 701 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 702 703 getattr->ga_fhp = &cstate->current_fh; 704 return nfs_ok; 705 } 706 707 static __be32 708 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 709 struct nfsd4_link *link) 710 { 711 __be32 status = nfserr_nofilehandle; 712 713 if (!cstate->save_fh.fh_dentry) 714 return status; 715 status = nfsd_link(rqstp, &cstate->current_fh, 716 link->li_name, link->li_namelen, &cstate->save_fh); 717 if (!status) 718 set_change_info(&link->li_cinfo, &cstate->current_fh); 719 return status; 720 } 721 722 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 723 { 724 struct svc_fh tmp_fh; 725 __be32 ret; 726 727 fh_init(&tmp_fh, NFS4_FHSIZE); 728 ret = exp_pseudoroot(rqstp, &tmp_fh); 729 if (ret) 730 return ret; 731 if (tmp_fh.fh_dentry == fh->fh_dentry) { 732 fh_put(&tmp_fh); 733 return nfserr_noent; 734 } 735 fh_put(&tmp_fh); 736 return nfsd_lookup(rqstp, fh, "..", 2, fh); 737 } 738 739 static __be32 740 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 741 void *arg) 742 { 743 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 744 } 745 746 static __be32 747 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 748 struct nfsd4_lookup *lookup) 749 { 750 return nfsd_lookup(rqstp, &cstate->current_fh, 751 lookup->lo_name, lookup->lo_len, 752 &cstate->current_fh); 753 } 754 755 static __be32 756 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 757 struct nfsd4_read *read) 758 { 759 __be32 status; 760 761 /* no need to check permission - this will be done in nfsd_read() */ 762 763 read->rd_filp = NULL; 764 if (read->rd_offset >= OFFSET_MAX) 765 return nfserr_inval; 766 767 /* 768 * If we do a zero copy read, then a client will see read data 769 * that reflects the state of the file *after* performing the 770 * following compound. 771 * 772 * To ensure proper ordering, we therefore turn off zero copy if 773 * the client wants us to do more in this compound: 774 */ 775 if (!nfsd4_last_compound_op(rqstp)) 776 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 777 778 /* check stateid */ 779 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 780 cstate, &read->rd_stateid, 781 RD_STATE, &read->rd_filp))) { 782 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 783 goto out; 784 } 785 status = nfs_ok; 786 out: 787 read->rd_rqstp = rqstp; 788 read->rd_fhp = &cstate->current_fh; 789 return status; 790 } 791 792 static __be32 793 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 794 struct nfsd4_readdir *readdir) 795 { 796 u64 cookie = readdir->rd_cookie; 797 static const nfs4_verifier zeroverf; 798 799 /* no need to check permission - this will be done in nfsd_readdir() */ 800 801 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 802 return nfserr_inval; 803 804 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 805 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 806 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 807 808 if ((cookie == 1) || (cookie == 2) || 809 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 810 return nfserr_bad_cookie; 811 812 readdir->rd_rqstp = rqstp; 813 readdir->rd_fhp = &cstate->current_fh; 814 return nfs_ok; 815 } 816 817 static __be32 818 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 819 struct nfsd4_readlink *readlink) 820 { 821 readlink->rl_rqstp = rqstp; 822 readlink->rl_fhp = &cstate->current_fh; 823 return nfs_ok; 824 } 825 826 static __be32 827 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 828 struct nfsd4_remove *remove) 829 { 830 __be32 status; 831 832 if (locks_in_grace(SVC_NET(rqstp))) 833 return nfserr_grace; 834 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 835 remove->rm_name, remove->rm_namelen); 836 if (!status) { 837 fh_unlock(&cstate->current_fh); 838 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 839 } 840 return status; 841 } 842 843 static __be32 844 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 845 struct nfsd4_rename *rename) 846 { 847 __be32 status = nfserr_nofilehandle; 848 849 if (!cstate->save_fh.fh_dentry) 850 return status; 851 if (locks_in_grace(SVC_NET(rqstp)) && 852 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 853 return nfserr_grace; 854 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 855 rename->rn_snamelen, &cstate->current_fh, 856 rename->rn_tname, rename->rn_tnamelen); 857 if (status) 858 return status; 859 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 860 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 861 return nfs_ok; 862 } 863 864 static __be32 865 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 866 struct nfsd4_secinfo *secinfo) 867 { 868 struct svc_fh resfh; 869 struct svc_export *exp; 870 struct dentry *dentry; 871 __be32 err; 872 873 fh_init(&resfh, NFS4_FHSIZE); 874 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 875 if (err) 876 return err; 877 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 878 secinfo->si_name, secinfo->si_namelen, 879 &exp, &dentry); 880 if (err) 881 return err; 882 if (dentry->d_inode == NULL) { 883 exp_put(exp); 884 err = nfserr_noent; 885 } else 886 secinfo->si_exp = exp; 887 dput(dentry); 888 if (cstate->minorversion) 889 /* See rfc 5661 section 2.6.3.1.1.8 */ 890 fh_put(&cstate->current_fh); 891 return err; 892 } 893 894 static __be32 895 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 896 struct nfsd4_secinfo_no_name *sin) 897 { 898 __be32 err; 899 900 switch (sin->sin_style) { 901 case NFS4_SECINFO_STYLE4_CURRENT_FH: 902 break; 903 case NFS4_SECINFO_STYLE4_PARENT: 904 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 905 if (err) 906 return err; 907 break; 908 default: 909 return nfserr_inval; 910 } 911 912 sin->sin_exp = exp_get(cstate->current_fh.fh_export); 913 fh_put(&cstate->current_fh); 914 return nfs_ok; 915 } 916 917 static __be32 918 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 919 struct nfsd4_setattr *setattr) 920 { 921 __be32 status = nfs_ok; 922 int err; 923 924 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 925 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 926 &setattr->sa_stateid, WR_STATE, NULL); 927 if (status) { 928 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 929 return status; 930 } 931 } 932 err = fh_want_write(&cstate->current_fh); 933 if (err) 934 return nfserrno(err); 935 status = nfs_ok; 936 937 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 938 nfsd_attrmask); 939 if (status) 940 goto out; 941 942 if (setattr->sa_acl != NULL) 943 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 944 setattr->sa_acl); 945 if (status) 946 goto out; 947 if (setattr->sa_label.len) 948 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 949 &setattr->sa_label); 950 if (status) 951 goto out; 952 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 953 0, (time_t)0); 954 out: 955 fh_drop_write(&cstate->current_fh); 956 return status; 957 } 958 959 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 960 { 961 int i = 1; 962 int buflen = write->wr_buflen; 963 964 vec[0].iov_base = write->wr_head.iov_base; 965 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 966 buflen -= vec[0].iov_len; 967 968 while (buflen) { 969 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 970 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 971 buflen -= vec[i].iov_len; 972 i++; 973 } 974 return i; 975 } 976 977 static __be32 978 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 979 struct nfsd4_write *write) 980 { 981 stateid_t *stateid = &write->wr_stateid; 982 struct file *filp = NULL; 983 __be32 status = nfs_ok; 984 unsigned long cnt; 985 int nvecs; 986 987 /* no need to check permission - this will be done in nfsd_write() */ 988 989 if (write->wr_offset >= OFFSET_MAX) 990 return nfserr_inval; 991 992 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 993 cstate, stateid, WR_STATE, &filp); 994 if (status) { 995 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 996 return status; 997 } 998 999 cnt = write->wr_buflen; 1000 write->wr_how_written = write->wr_stable_how; 1001 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 1002 1003 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1004 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1005 1006 status = nfsd_write(rqstp, &cstate->current_fh, filp, 1007 write->wr_offset, rqstp->rq_vec, nvecs, 1008 &cnt, &write->wr_how_written); 1009 if (filp) 1010 fput(filp); 1011 1012 write->wr_bytes_written = cnt; 1013 1014 return status; 1015 } 1016 1017 static __be32 1018 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1019 struct nfsd4_fallocate *fallocate, int flags) 1020 { 1021 __be32 status = nfserr_notsupp; 1022 struct file *file; 1023 1024 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 1025 &fallocate->falloc_stateid, 1026 WR_STATE, &file); 1027 if (status != nfs_ok) { 1028 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1029 return status; 1030 } 1031 1032 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file, 1033 fallocate->falloc_offset, 1034 fallocate->falloc_length, 1035 flags); 1036 fput(file); 1037 return status; 1038 } 1039 1040 static __be32 1041 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1042 struct nfsd4_fallocate *fallocate) 1043 { 1044 return nfsd4_fallocate(rqstp, cstate, fallocate, 0); 1045 } 1046 1047 static __be32 1048 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1049 struct nfsd4_fallocate *fallocate) 1050 { 1051 return nfsd4_fallocate(rqstp, cstate, fallocate, 1052 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1053 } 1054 1055 static __be32 1056 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1057 struct nfsd4_seek *seek) 1058 { 1059 int whence; 1060 __be32 status; 1061 struct file *file; 1062 1063 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 1064 &seek->seek_stateid, 1065 RD_STATE, &file); 1066 if (status) { 1067 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1068 return status; 1069 } 1070 1071 switch (seek->seek_whence) { 1072 case NFS4_CONTENT_DATA: 1073 whence = SEEK_DATA; 1074 break; 1075 case NFS4_CONTENT_HOLE: 1076 whence = SEEK_HOLE; 1077 break; 1078 default: 1079 status = nfserr_union_notsupp; 1080 goto out; 1081 } 1082 1083 /* 1084 * Note: This call does change file->f_pos, but nothing in NFSD 1085 * should ever file->f_pos. 1086 */ 1087 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); 1088 if (seek->seek_pos < 0) 1089 status = nfserrno(seek->seek_pos); 1090 else if (seek->seek_pos >= i_size_read(file_inode(file))) 1091 seek->seek_eof = true; 1092 1093 out: 1094 fput(file); 1095 return status; 1096 } 1097 1098 /* This routine never returns NFS_OK! If there are no other errors, it 1099 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1100 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1101 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1102 */ 1103 static __be32 1104 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1105 struct nfsd4_verify *verify) 1106 { 1107 __be32 *buf, *p; 1108 int count; 1109 __be32 status; 1110 1111 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1112 if (status) 1113 return status; 1114 1115 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1116 if (status) 1117 return status; 1118 1119 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1120 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1121 return nfserr_inval; 1122 if (verify->ve_attrlen & 3) 1123 return nfserr_inval; 1124 1125 /* count in words: 1126 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1127 */ 1128 count = 4 + (verify->ve_attrlen >> 2); 1129 buf = kmalloc(count << 2, GFP_KERNEL); 1130 if (!buf) 1131 return nfserr_jukebox; 1132 1133 p = buf; 1134 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1135 cstate->current_fh.fh_export, 1136 cstate->current_fh.fh_dentry, 1137 verify->ve_bmval, 1138 rqstp, 0); 1139 /* 1140 * If nfsd4_encode_fattr() ran out of space, assume that's because 1141 * the attributes are longer (hence different) than those given: 1142 */ 1143 if (status == nfserr_resource) 1144 status = nfserr_not_same; 1145 if (status) 1146 goto out_kfree; 1147 1148 /* skip bitmap */ 1149 p = buf + 1 + ntohl(buf[0]); 1150 status = nfserr_not_same; 1151 if (ntohl(*p++) != verify->ve_attrlen) 1152 goto out_kfree; 1153 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1154 status = nfserr_same; 1155 1156 out_kfree: 1157 kfree(buf); 1158 return status; 1159 } 1160 1161 static __be32 1162 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1163 struct nfsd4_verify *verify) 1164 { 1165 __be32 status; 1166 1167 status = _nfsd4_verify(rqstp, cstate, verify); 1168 return status == nfserr_not_same ? nfs_ok : status; 1169 } 1170 1171 static __be32 1172 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1173 struct nfsd4_verify *verify) 1174 { 1175 __be32 status; 1176 1177 status = _nfsd4_verify(rqstp, cstate, verify); 1178 return status == nfserr_same ? nfs_ok : status; 1179 } 1180 1181 /* 1182 * NULL call. 1183 */ 1184 static __be32 1185 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1186 { 1187 return nfs_ok; 1188 } 1189 1190 static inline void nfsd4_increment_op_stats(u32 opnum) 1191 { 1192 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1193 nfsdstats.nfs4_opcount[opnum]++; 1194 } 1195 1196 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1197 void *); 1198 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1199 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1200 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1201 1202 enum nfsd4_op_flags { 1203 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1204 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1205 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1206 /* For rfc 5661 section 2.6.3.1.1: */ 1207 OP_HANDLES_WRONGSEC = 1 << 3, 1208 OP_IS_PUTFH_LIKE = 1 << 4, 1209 /* 1210 * These are the ops whose result size we estimate before 1211 * encoding, to avoid performing an op then not being able to 1212 * respond or cache a response. This includes writes and setattrs 1213 * as well as the operations usually called "nonidempotent": 1214 */ 1215 OP_MODIFIES_SOMETHING = 1 << 5, 1216 /* 1217 * Cache compounds containing these ops in the xid-based drc: 1218 * We use the DRC for compounds containing non-idempotent 1219 * operations, *except* those that are 4.1-specific (since 1220 * sessions provide their own EOS), and except for stateful 1221 * operations other than setclientid and setclientid_confirm 1222 * (since sequence numbers provide EOS for open, lock, etc in 1223 * the v4.0 case). 1224 */ 1225 OP_CACHEME = 1 << 6, 1226 /* 1227 * These are ops which clear current state id. 1228 */ 1229 OP_CLEAR_STATEID = 1 << 7, 1230 }; 1231 1232 struct nfsd4_operation { 1233 nfsd4op_func op_func; 1234 u32 op_flags; 1235 char *op_name; 1236 /* Try to get response size before operation */ 1237 nfsd4op_rsize op_rsize_bop; 1238 stateid_getter op_get_currentstateid; 1239 stateid_setter op_set_currentstateid; 1240 }; 1241 1242 static struct nfsd4_operation nfsd4_ops[]; 1243 1244 static const char *nfsd4_op_name(unsigned opnum); 1245 1246 /* 1247 * Enforce NFSv4.1 COMPOUND ordering rules: 1248 * 1249 * Also note, enforced elsewhere: 1250 * - SEQUENCE other than as first op results in 1251 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1252 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1253 * (Enforced in nfsd4_bind_conn_to_session().) 1254 * - DESTROY_SESSION must be the final operation in a compound, if 1255 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1256 * (Enforced in nfsd4_destroy_session().) 1257 */ 1258 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1259 { 1260 struct nfsd4_op *op = &args->ops[0]; 1261 1262 /* These ordering requirements don't apply to NFSv4.0: */ 1263 if (args->minorversion == 0) 1264 return nfs_ok; 1265 /* This is weird, but OK, not our problem: */ 1266 if (args->opcnt == 0) 1267 return nfs_ok; 1268 if (op->status == nfserr_op_illegal) 1269 return nfs_ok; 1270 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1271 return nfserr_op_not_in_session; 1272 if (op->opnum == OP_SEQUENCE) 1273 return nfs_ok; 1274 if (args->opcnt != 1) 1275 return nfserr_not_only_op; 1276 return nfs_ok; 1277 } 1278 1279 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1280 { 1281 return &nfsd4_ops[op->opnum]; 1282 } 1283 1284 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1285 { 1286 if (op->opnum == OP_ILLEGAL) 1287 return false; 1288 return OPDESC(op)->op_flags & OP_CACHEME; 1289 } 1290 1291 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1292 { 1293 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1294 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1295 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1296 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1297 struct nfsd4_operation *thisd; 1298 struct nfsd4_operation *nextd; 1299 1300 thisd = OPDESC(this); 1301 /* 1302 * Most ops check wronsec on our own; only the putfh-like ops 1303 * have special rules. 1304 */ 1305 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1306 return false; 1307 /* 1308 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1309 * put-filehandle operation if we're not going to use the 1310 * result: 1311 */ 1312 if (argp->opcnt == resp->opcnt) 1313 return false; 1314 if (next->opnum == OP_ILLEGAL) 1315 return false; 1316 nextd = OPDESC(next); 1317 /* 1318 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1319 * errors themselves as necessary; others should check for them 1320 * now: 1321 */ 1322 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1323 } 1324 1325 static void svcxdr_init_encode(struct svc_rqst *rqstp, 1326 struct nfsd4_compoundres *resp) 1327 { 1328 struct xdr_stream *xdr = &resp->xdr; 1329 struct xdr_buf *buf = &rqstp->rq_res; 1330 struct kvec *head = buf->head; 1331 1332 xdr->buf = buf; 1333 xdr->iov = head; 1334 xdr->p = head->iov_base + head->iov_len; 1335 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1336 /* Tail and page_len should be zero at this point: */ 1337 buf->len = buf->head[0].iov_len; 1338 xdr->scratch.iov_len = 0; 1339 xdr->page_ptr = buf->pages - 1; 1340 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1341 - rqstp->rq_auth_slack; 1342 } 1343 1344 /* 1345 * COMPOUND call. 1346 */ 1347 static __be32 1348 nfsd4_proc_compound(struct svc_rqst *rqstp, 1349 struct nfsd4_compoundargs *args, 1350 struct nfsd4_compoundres *resp) 1351 { 1352 struct nfsd4_op *op; 1353 struct nfsd4_operation *opdesc; 1354 struct nfsd4_compound_state *cstate = &resp->cstate; 1355 struct svc_fh *current_fh = &cstate->current_fh; 1356 struct svc_fh *save_fh = &cstate->save_fh; 1357 __be32 status; 1358 1359 svcxdr_init_encode(rqstp, resp); 1360 resp->tagp = resp->xdr.p; 1361 /* reserve space for: taglen, tag, and opcnt */ 1362 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1363 resp->taglen = args->taglen; 1364 resp->tag = args->tag; 1365 resp->rqstp = rqstp; 1366 cstate->minorversion = args->minorversion; 1367 fh_init(current_fh, NFS4_FHSIZE); 1368 fh_init(save_fh, NFS4_FHSIZE); 1369 /* 1370 * Don't use the deferral mechanism for NFSv4; compounds make it 1371 * too hard to avoid non-idempotency problems. 1372 */ 1373 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1374 1375 /* 1376 * According to RFC3010, this takes precedence over all other errors. 1377 */ 1378 status = nfserr_minor_vers_mismatch; 1379 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1380 goto out; 1381 1382 status = nfs41_check_op_ordering(args); 1383 if (status) { 1384 op = &args->ops[0]; 1385 op->status = status; 1386 goto encode_op; 1387 } 1388 1389 while (!status && resp->opcnt < args->opcnt) { 1390 op = &args->ops[resp->opcnt++]; 1391 1392 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1393 resp->opcnt, args->opcnt, op->opnum, 1394 nfsd4_op_name(op->opnum)); 1395 /* 1396 * The XDR decode routines may have pre-set op->status; 1397 * for example, if there is a miscellaneous XDR error 1398 * it will be set to nfserr_bad_xdr. 1399 */ 1400 if (op->status) { 1401 if (op->opnum == OP_OPEN) 1402 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1403 goto encode_op; 1404 } 1405 1406 opdesc = OPDESC(op); 1407 1408 if (!current_fh->fh_dentry) { 1409 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1410 op->status = nfserr_nofilehandle; 1411 goto encode_op; 1412 } 1413 } else if (current_fh->fh_export->ex_fslocs.migrated && 1414 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1415 op->status = nfserr_moved; 1416 goto encode_op; 1417 } 1418 1419 fh_clear_wcc(current_fh); 1420 1421 /* If op is non-idempotent */ 1422 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1423 /* 1424 * Don't execute this op if we couldn't encode a 1425 * succesful reply: 1426 */ 1427 u32 plen = opdesc->op_rsize_bop(rqstp, op); 1428 /* 1429 * Plus if there's another operation, make sure 1430 * we'll have space to at least encode an error: 1431 */ 1432 if (resp->opcnt < args->opcnt) 1433 plen += COMPOUND_ERR_SLACK_SPACE; 1434 op->status = nfsd4_check_resp_size(resp, plen); 1435 } 1436 1437 if (op->status) 1438 goto encode_op; 1439 1440 if (opdesc->op_get_currentstateid) 1441 opdesc->op_get_currentstateid(cstate, &op->u); 1442 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1443 1444 if (!op->status) { 1445 if (opdesc->op_set_currentstateid) 1446 opdesc->op_set_currentstateid(cstate, &op->u); 1447 1448 if (opdesc->op_flags & OP_CLEAR_STATEID) 1449 clear_current_stateid(cstate); 1450 1451 if (need_wrongsec_check(rqstp)) 1452 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 1453 } 1454 1455 encode_op: 1456 /* Only from SEQUENCE */ 1457 if (cstate->status == nfserr_replay_cache) { 1458 dprintk("%s NFS4.1 replay from cache\n", __func__); 1459 status = op->status; 1460 goto out; 1461 } 1462 if (op->status == nfserr_replay_me) { 1463 op->replay = &cstate->replay_owner->so_replay; 1464 nfsd4_encode_replay(&resp->xdr, op); 1465 status = op->status = op->replay->rp_status; 1466 } else { 1467 nfsd4_encode_operation(resp, op); 1468 status = op->status; 1469 } 1470 1471 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1472 args->ops, args->opcnt, resp->opcnt, op->opnum, 1473 be32_to_cpu(status)); 1474 1475 nfsd4_cstate_clear_replay(cstate); 1476 /* XXX Ugh, we need to get rid of this kind of special case: */ 1477 if (op->opnum == OP_READ && op->u.read.rd_filp) 1478 fput(op->u.read.rd_filp); 1479 1480 nfsd4_increment_op_stats(op->opnum); 1481 } 1482 1483 cstate->status = status; 1484 fh_put(current_fh); 1485 fh_put(save_fh); 1486 BUG_ON(cstate->replay_owner); 1487 out: 1488 /* Reset deferral mechanism for RPC deferrals */ 1489 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1490 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1491 return status; 1492 } 1493 1494 #define op_encode_hdr_size (2) 1495 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1496 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1497 #define op_encode_change_info_maxsz (5) 1498 #define nfs4_fattr_bitmap_maxsz (4) 1499 1500 /* We'll fall back on returning no lockowner if run out of space: */ 1501 #define op_encode_lockowner_maxsz (0) 1502 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1503 1504 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1505 1506 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1507 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1508 op_encode_ace_maxsz) 1509 1510 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1511 1512 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1513 { 1514 return (op_encode_hdr_size) * sizeof(__be32); 1515 } 1516 1517 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1518 { 1519 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1520 } 1521 1522 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1523 { 1524 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1525 } 1526 1527 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1528 { 1529 return (op_encode_hdr_size + op_encode_change_info_maxsz 1530 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1531 } 1532 1533 /* 1534 * Note since this is an idempotent operation we won't insist on failing 1535 * the op prematurely if the estimate is too large. We may turn off splice 1536 * reads unnecessarily. 1537 */ 1538 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1539 struct nfsd4_op *op) 1540 { 1541 u32 *bmap = op->u.getattr.ga_bmval; 1542 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1543 u32 ret = 0; 1544 1545 if (bmap0 & FATTR4_WORD0_ACL) 1546 return svc_max_payload(rqstp); 1547 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1548 return svc_max_payload(rqstp); 1549 1550 if (bmap1 & FATTR4_WORD1_OWNER) { 1551 ret += IDMAP_NAMESZ + 4; 1552 bmap1 &= ~FATTR4_WORD1_OWNER; 1553 } 1554 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1555 ret += IDMAP_NAMESZ + 4; 1556 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1557 } 1558 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1559 ret += NFS4_FHSIZE + 4; 1560 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1561 } 1562 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1563 ret += NFSD4_MAX_SEC_LABEL_LEN + 12; 1564 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1565 } 1566 /* 1567 * Largest of remaining attributes are 16 bytes (e.g., 1568 * supported_attributes) 1569 */ 1570 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1571 /* bitmask, length */ 1572 ret += 20; 1573 return ret; 1574 } 1575 1576 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1577 { 1578 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1579 * sizeof(__be32); 1580 } 1581 1582 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1583 { 1584 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1585 * sizeof(__be32); 1586 } 1587 1588 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1589 { 1590 return (op_encode_hdr_size + op_encode_stateid_maxsz 1591 + op_encode_change_info_maxsz + 1 1592 + nfs4_fattr_bitmap_maxsz 1593 + op_encode_delegation_maxsz) * sizeof(__be32); 1594 } 1595 1596 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1597 { 1598 u32 maxcount = 0, rlen = 0; 1599 1600 maxcount = svc_max_payload(rqstp); 1601 rlen = min(op->u.read.rd_length, maxcount); 1602 1603 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1604 } 1605 1606 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1607 { 1608 u32 maxcount = 0, rlen = 0; 1609 1610 maxcount = svc_max_payload(rqstp); 1611 rlen = min(op->u.readdir.rd_maxcount, maxcount); 1612 1613 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1614 XDR_QUADLEN(rlen)) * sizeof(__be32); 1615 } 1616 1617 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1618 { 1619 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1620 * sizeof(__be32); 1621 } 1622 1623 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1624 { 1625 return (op_encode_hdr_size + op_encode_change_info_maxsz 1626 + op_encode_change_info_maxsz) * sizeof(__be32); 1627 } 1628 1629 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1630 struct nfsd4_op *op) 1631 { 1632 return (op_encode_hdr_size 1633 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 1634 } 1635 1636 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1637 { 1638 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1639 } 1640 1641 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1642 { 1643 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1644 sizeof(__be32); 1645 } 1646 1647 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1648 { 1649 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 1650 } 1651 1652 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1653 { 1654 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1655 1 + 1 + /* eir_flags, spr_how */\ 1656 4 + /* spo_must_enforce & _allow with bitmap */\ 1657 2 + /*eir_server_owner.so_minor_id */\ 1658 /* eir_server_owner.so_major_id<> */\ 1659 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1660 /* eir_server_scope<> */\ 1661 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1662 1 + /* eir_server_impl_id array length */\ 1663 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1664 } 1665 1666 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1667 { 1668 return (op_encode_hdr_size + \ 1669 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1670 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1671 } 1672 1673 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1674 { 1675 return (op_encode_hdr_size + \ 1676 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1677 2 + /* csr_sequence, csr_flags */\ 1678 op_encode_channel_attrs_maxsz + \ 1679 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1680 } 1681 1682 static struct nfsd4_operation nfsd4_ops[] = { 1683 [OP_ACCESS] = { 1684 .op_func = (nfsd4op_func)nfsd4_access, 1685 .op_name = "OP_ACCESS", 1686 }, 1687 [OP_CLOSE] = { 1688 .op_func = (nfsd4op_func)nfsd4_close, 1689 .op_flags = OP_MODIFIES_SOMETHING, 1690 .op_name = "OP_CLOSE", 1691 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1692 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 1693 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 1694 }, 1695 [OP_COMMIT] = { 1696 .op_func = (nfsd4op_func)nfsd4_commit, 1697 .op_flags = OP_MODIFIES_SOMETHING, 1698 .op_name = "OP_COMMIT", 1699 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 1700 }, 1701 [OP_CREATE] = { 1702 .op_func = (nfsd4op_func)nfsd4_create, 1703 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 1704 .op_name = "OP_CREATE", 1705 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 1706 }, 1707 [OP_DELEGRETURN] = { 1708 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1709 .op_flags = OP_MODIFIES_SOMETHING, 1710 .op_name = "OP_DELEGRETURN", 1711 .op_rsize_bop = nfsd4_only_status_rsize, 1712 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 1713 }, 1714 [OP_GETATTR] = { 1715 .op_func = (nfsd4op_func)nfsd4_getattr, 1716 .op_flags = ALLOWED_ON_ABSENT_FS, 1717 .op_rsize_bop = nfsd4_getattr_rsize, 1718 .op_name = "OP_GETATTR", 1719 }, 1720 [OP_GETFH] = { 1721 .op_func = (nfsd4op_func)nfsd4_getfh, 1722 .op_name = "OP_GETFH", 1723 }, 1724 [OP_LINK] = { 1725 .op_func = (nfsd4op_func)nfsd4_link, 1726 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 1727 | OP_CACHEME, 1728 .op_name = "OP_LINK", 1729 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 1730 }, 1731 [OP_LOCK] = { 1732 .op_func = (nfsd4op_func)nfsd4_lock, 1733 .op_flags = OP_MODIFIES_SOMETHING, 1734 .op_name = "OP_LOCK", 1735 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 1736 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 1737 }, 1738 [OP_LOCKT] = { 1739 .op_func = (nfsd4op_func)nfsd4_lockt, 1740 .op_name = "OP_LOCKT", 1741 }, 1742 [OP_LOCKU] = { 1743 .op_func = (nfsd4op_func)nfsd4_locku, 1744 .op_flags = OP_MODIFIES_SOMETHING, 1745 .op_name = "OP_LOCKU", 1746 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1747 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 1748 }, 1749 [OP_LOOKUP] = { 1750 .op_func = (nfsd4op_func)nfsd4_lookup, 1751 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1752 .op_name = "OP_LOOKUP", 1753 }, 1754 [OP_LOOKUPP] = { 1755 .op_func = (nfsd4op_func)nfsd4_lookupp, 1756 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1757 .op_name = "OP_LOOKUPP", 1758 }, 1759 [OP_NVERIFY] = { 1760 .op_func = (nfsd4op_func)nfsd4_nverify, 1761 .op_name = "OP_NVERIFY", 1762 }, 1763 [OP_OPEN] = { 1764 .op_func = (nfsd4op_func)nfsd4_open, 1765 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1766 .op_name = "OP_OPEN", 1767 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 1768 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 1769 }, 1770 [OP_OPEN_CONFIRM] = { 1771 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1772 .op_flags = OP_MODIFIES_SOMETHING, 1773 .op_name = "OP_OPEN_CONFIRM", 1774 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1775 }, 1776 [OP_OPEN_DOWNGRADE] = { 1777 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1778 .op_flags = OP_MODIFIES_SOMETHING, 1779 .op_name = "OP_OPEN_DOWNGRADE", 1780 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1781 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 1782 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 1783 }, 1784 [OP_PUTFH] = { 1785 .op_func = (nfsd4op_func)nfsd4_putfh, 1786 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1787 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 1788 .op_name = "OP_PUTFH", 1789 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1790 }, 1791 [OP_PUTPUBFH] = { 1792 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1793 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1794 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 1795 .op_name = "OP_PUTPUBFH", 1796 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1797 }, 1798 [OP_PUTROOTFH] = { 1799 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1800 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1801 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 1802 .op_name = "OP_PUTROOTFH", 1803 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1804 }, 1805 [OP_READ] = { 1806 .op_func = (nfsd4op_func)nfsd4_read, 1807 .op_name = "OP_READ", 1808 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 1809 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 1810 }, 1811 [OP_READDIR] = { 1812 .op_func = (nfsd4op_func)nfsd4_readdir, 1813 .op_name = "OP_READDIR", 1814 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 1815 }, 1816 [OP_READLINK] = { 1817 .op_func = (nfsd4op_func)nfsd4_readlink, 1818 .op_name = "OP_READLINK", 1819 }, 1820 [OP_REMOVE] = { 1821 .op_func = (nfsd4op_func)nfsd4_remove, 1822 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1823 .op_name = "OP_REMOVE", 1824 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 1825 }, 1826 [OP_RENAME] = { 1827 .op_func = (nfsd4op_func)nfsd4_rename, 1828 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1829 .op_name = "OP_RENAME", 1830 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 1831 }, 1832 [OP_RENEW] = { 1833 .op_func = (nfsd4op_func)nfsd4_renew, 1834 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1835 | OP_MODIFIES_SOMETHING, 1836 .op_name = "OP_RENEW", 1837 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1838 1839 }, 1840 [OP_RESTOREFH] = { 1841 .op_func = (nfsd4op_func)nfsd4_restorefh, 1842 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1843 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 1844 .op_name = "OP_RESTOREFH", 1845 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1846 }, 1847 [OP_SAVEFH] = { 1848 .op_func = (nfsd4op_func)nfsd4_savefh, 1849 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1850 .op_name = "OP_SAVEFH", 1851 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1852 }, 1853 [OP_SECINFO] = { 1854 .op_func = (nfsd4op_func)nfsd4_secinfo, 1855 .op_flags = OP_HANDLES_WRONGSEC, 1856 .op_name = "OP_SECINFO", 1857 }, 1858 [OP_SETATTR] = { 1859 .op_func = (nfsd4op_func)nfsd4_setattr, 1860 .op_name = "OP_SETATTR", 1861 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1862 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 1863 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 1864 }, 1865 [OP_SETCLIENTID] = { 1866 .op_func = (nfsd4op_func)nfsd4_setclientid, 1867 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1868 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1869 .op_name = "OP_SETCLIENTID", 1870 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 1871 }, 1872 [OP_SETCLIENTID_CONFIRM] = { 1873 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1874 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1875 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1876 .op_name = "OP_SETCLIENTID_CONFIRM", 1877 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1878 }, 1879 [OP_VERIFY] = { 1880 .op_func = (nfsd4op_func)nfsd4_verify, 1881 .op_name = "OP_VERIFY", 1882 }, 1883 [OP_WRITE] = { 1884 .op_func = (nfsd4op_func)nfsd4_write, 1885 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1886 .op_name = "OP_WRITE", 1887 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 1888 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 1889 }, 1890 [OP_RELEASE_LOCKOWNER] = { 1891 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1892 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1893 | OP_MODIFIES_SOMETHING, 1894 .op_name = "OP_RELEASE_LOCKOWNER", 1895 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1896 }, 1897 1898 /* NFSv4.1 operations */ 1899 [OP_EXCHANGE_ID] = { 1900 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1901 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1902 | OP_MODIFIES_SOMETHING, 1903 .op_name = "OP_EXCHANGE_ID", 1904 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 1905 }, 1906 [OP_BACKCHANNEL_CTL] = { 1907 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 1908 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1909 .op_name = "OP_BACKCHANNEL_CTL", 1910 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1911 }, 1912 [OP_BIND_CONN_TO_SESSION] = { 1913 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 1914 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1915 | OP_MODIFIES_SOMETHING, 1916 .op_name = "OP_BIND_CONN_TO_SESSION", 1917 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 1918 }, 1919 [OP_CREATE_SESSION] = { 1920 .op_func = (nfsd4op_func)nfsd4_create_session, 1921 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1922 | OP_MODIFIES_SOMETHING, 1923 .op_name = "OP_CREATE_SESSION", 1924 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 1925 }, 1926 [OP_DESTROY_SESSION] = { 1927 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1928 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1929 | OP_MODIFIES_SOMETHING, 1930 .op_name = "OP_DESTROY_SESSION", 1931 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1932 }, 1933 [OP_SEQUENCE] = { 1934 .op_func = (nfsd4op_func)nfsd4_sequence, 1935 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1936 .op_name = "OP_SEQUENCE", 1937 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize, 1938 }, 1939 [OP_DESTROY_CLIENTID] = { 1940 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 1941 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1942 | OP_MODIFIES_SOMETHING, 1943 .op_name = "OP_DESTROY_CLIENTID", 1944 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1945 }, 1946 [OP_RECLAIM_COMPLETE] = { 1947 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 1948 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1949 .op_name = "OP_RECLAIM_COMPLETE", 1950 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1951 }, 1952 [OP_SECINFO_NO_NAME] = { 1953 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 1954 .op_flags = OP_HANDLES_WRONGSEC, 1955 .op_name = "OP_SECINFO_NO_NAME", 1956 }, 1957 [OP_TEST_STATEID] = { 1958 .op_func = (nfsd4op_func)nfsd4_test_stateid, 1959 .op_flags = ALLOWED_WITHOUT_FH, 1960 .op_name = "OP_TEST_STATEID", 1961 }, 1962 [OP_FREE_STATEID] = { 1963 .op_func = (nfsd4op_func)nfsd4_free_stateid, 1964 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1965 .op_name = "OP_FREE_STATEID", 1966 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 1967 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1968 }, 1969 1970 /* NFSv4.2 operations */ 1971 [OP_ALLOCATE] = { 1972 .op_func = (nfsd4op_func)nfsd4_allocate, 1973 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1974 .op_name = "OP_ALLOCATE", 1975 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 1976 }, 1977 [OP_DEALLOCATE] = { 1978 .op_func = (nfsd4op_func)nfsd4_deallocate, 1979 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1980 .op_name = "OP_DEALLOCATE", 1981 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 1982 }, 1983 [OP_SEEK] = { 1984 .op_func = (nfsd4op_func)nfsd4_seek, 1985 .op_name = "OP_SEEK", 1986 }, 1987 }; 1988 1989 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 1990 { 1991 struct nfsd4_operation *opdesc; 1992 nfsd4op_rsize estimator; 1993 1994 if (op->opnum == OP_ILLEGAL) 1995 return op_encode_hdr_size * sizeof(__be32); 1996 opdesc = OPDESC(op); 1997 estimator = opdesc->op_rsize_bop; 1998 return estimator ? estimator(rqstp, op) : PAGE_SIZE; 1999 } 2000 2001 void warn_on_nonidempotent_op(struct nfsd4_op *op) 2002 { 2003 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 2004 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 2005 op->opnum, nfsd4_op_name(op->opnum)); 2006 WARN_ON_ONCE(1); 2007 } 2008 } 2009 2010 static const char *nfsd4_op_name(unsigned opnum) 2011 { 2012 if (opnum < ARRAY_SIZE(nfsd4_ops)) 2013 return nfsd4_ops[opnum].op_name; 2014 return "unknown_operation"; 2015 } 2016 2017 #define nfsd4_voidres nfsd4_voidargs 2018 struct nfsd4_voidargs { int dummy; }; 2019 2020 static struct svc_procedure nfsd_procedures4[2] = { 2021 [NFSPROC4_NULL] = { 2022 .pc_func = (svc_procfunc) nfsd4_proc_null, 2023 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 2024 .pc_argsize = sizeof(struct nfsd4_voidargs), 2025 .pc_ressize = sizeof(struct nfsd4_voidres), 2026 .pc_cachetype = RC_NOCACHE, 2027 .pc_xdrressize = 1, 2028 }, 2029 [NFSPROC4_COMPOUND] = { 2030 .pc_func = (svc_procfunc) nfsd4_proc_compound, 2031 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 2032 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 2033 .pc_argsize = sizeof(struct nfsd4_compoundargs), 2034 .pc_ressize = sizeof(struct nfsd4_compoundres), 2035 .pc_release = nfsd4_release_compoundargs, 2036 .pc_cachetype = RC_NOCACHE, 2037 .pc_xdrressize = NFSD_BUFSIZE/4, 2038 }, 2039 }; 2040 2041 struct svc_version nfsd_version4 = { 2042 .vs_vers = 4, 2043 .vs_nproc = 2, 2044 .vs_proc = nfsd_procedures4, 2045 .vs_dispatch = nfsd_dispatch, 2046 .vs_xdrsize = NFS4_SVC_XDRSIZE, 2047 .vs_rpcb_optnl = 1, 2048 }; 2049 2050 /* 2051 * Local variables: 2052 * c-basic-offset: 8 2053 * End: 2054 */ 2055