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/slab.h> 37 38 #include "idmap.h" 39 #include "cache.h" 40 #include "xdr4.h" 41 #include "vfs.h" 42 #include "current_stateid.h" 43 #include "netns.h" 44 #include "acl.h" 45 46 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 47 #include <linux/security.h> 48 49 static inline void 50 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 51 { 52 struct inode *inode = resfh->fh_dentry->d_inode; 53 int status; 54 55 mutex_lock(&inode->i_mutex); 56 status = security_inode_setsecctx(resfh->fh_dentry, 57 label->data, label->len); 58 mutex_unlock(&inode->i_mutex); 59 60 if (status) 61 /* 62 * XXX: We should really fail the whole open, but we may 63 * already have created a new file, so it may be too 64 * late. For now this seems the least of evils: 65 */ 66 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 67 68 return; 69 } 70 #else 71 static inline void 72 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 73 { } 74 #endif 75 76 #define NFSDDBG_FACILITY NFSDDBG_PROC 77 78 static u32 nfsd_attrmask[] = { 79 NFSD_WRITEABLE_ATTRS_WORD0, 80 NFSD_WRITEABLE_ATTRS_WORD1, 81 NFSD_WRITEABLE_ATTRS_WORD2 82 }; 83 84 static u32 nfsd41_ex_attrmask[] = { 85 NFSD_SUPPATTR_EXCLCREAT_WORD0, 86 NFSD_SUPPATTR_EXCLCREAT_WORD1, 87 NFSD_SUPPATTR_EXCLCREAT_WORD2 88 }; 89 90 static __be32 91 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 92 u32 *bmval, u32 *writable) 93 { 94 struct dentry *dentry = cstate->current_fh.fh_dentry; 95 96 /* 97 * Check about attributes are supported by the NFSv4 server or not. 98 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. 99 */ 100 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || 101 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || 102 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) 103 return nfserr_attrnotsupp; 104 105 /* 106 * Check FATTR4_WORD0_ACL can be supported 107 * in current environment or not. 108 */ 109 if (bmval[0] & FATTR4_WORD0_ACL) { 110 if (!IS_POSIXACL(dentry->d_inode)) 111 return nfserr_attrnotsupp; 112 } 113 114 /* 115 * According to spec, read-only attributes return ERR_INVAL. 116 */ 117 if (writable) { 118 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || 119 (bmval[2] & ~writable[2])) 120 return nfserr_inval; 121 } 122 123 return nfs_ok; 124 } 125 126 static __be32 127 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 128 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 129 { 130 __be32 status = nfs_ok; 131 132 if (open->op_create == NFS4_OPEN_CREATE) { 133 if (open->op_createmode == NFS4_CREATE_UNCHECKED 134 || open->op_createmode == NFS4_CREATE_GUARDED) 135 status = check_attr_support(rqstp, cstate, 136 open->op_bmval, nfsd_attrmask); 137 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 138 status = check_attr_support(rqstp, cstate, 139 open->op_bmval, nfsd41_ex_attrmask); 140 } 141 142 return status; 143 } 144 145 static int 146 is_create_with_attrs(struct nfsd4_open *open) 147 { 148 return open->op_create == NFS4_OPEN_CREATE 149 && (open->op_createmode == NFS4_CREATE_UNCHECKED 150 || open->op_createmode == NFS4_CREATE_GUARDED 151 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 152 } 153 154 /* 155 * if error occurs when setting the acl, just clear the acl bit 156 * in the returned attr bitmap. 157 */ 158 static void 159 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 160 struct nfs4_acl *acl, u32 *bmval) 161 { 162 __be32 status; 163 164 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 165 if (status) 166 /* 167 * We should probably fail the whole open at this point, 168 * but we've already created the file, so it's too late; 169 * So this seems the least of evils: 170 */ 171 bmval[0] &= ~FATTR4_WORD0_ACL; 172 } 173 174 static inline void 175 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 176 { 177 fh_put(dst); 178 dget(src->fh_dentry); 179 if (src->fh_export) 180 exp_get(src->fh_export); 181 *dst = *src; 182 } 183 184 static __be32 185 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 186 { 187 __be32 status; 188 189 if (open->op_truncate && 190 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 191 return nfserr_inval; 192 193 accmode |= NFSD_MAY_READ_IF_EXEC; 194 195 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 196 accmode |= NFSD_MAY_READ; 197 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 198 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 199 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 200 accmode |= NFSD_MAY_WRITE; 201 202 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 203 204 return status; 205 } 206 207 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 208 { 209 umode_t mode = fh->fh_dentry->d_inode->i_mode; 210 211 if (S_ISREG(mode)) 212 return nfs_ok; 213 if (S_ISDIR(mode)) 214 return nfserr_isdir; 215 /* 216 * Using err_symlink as our catch-all case may look odd; but 217 * there's no other obvious error for this case in 4.0, and we 218 * happen to know that it will cause the linux v4 client to do 219 * the right thing on attempts to open something other than a 220 * regular file. 221 */ 222 return nfserr_symlink; 223 } 224 225 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 226 { 227 if (nfsd4_has_session(cstate)) 228 return; 229 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 230 &resfh->fh_handle); 231 } 232 233 static __be32 234 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) 235 { 236 struct svc_fh *current_fh = &cstate->current_fh; 237 int accmode; 238 __be32 status; 239 240 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 241 if (!*resfh) 242 return nfserr_jukebox; 243 fh_init(*resfh, NFS4_FHSIZE); 244 open->op_truncate = 0; 245 246 if (open->op_create) { 247 /* FIXME: check session persistence and pnfs flags. 248 * The nfsv4.1 spec requires the following semantics: 249 * 250 * Persistent | pNFS | Server REQUIRED | Client Allowed 251 * Reply Cache | server | | 252 * -------------+--------+-----------------+-------------------- 253 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 254 * | | | (SHOULD) 255 * | | and EXCLUSIVE4 | or EXCLUSIVE4 256 * | | | (SHOULD NOT) 257 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 258 * yes | no | GUARDED4 | GUARDED4 259 * yes | yes | GUARDED4 | GUARDED4 260 */ 261 262 /* 263 * Note: create modes (UNCHECKED,GUARDED...) are the same 264 * in NFSv4 as in v3 except EXCLUSIVE4_1. 265 */ 266 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, 267 open->op_fname.len, &open->op_iattr, 268 *resfh, open->op_createmode, 269 (u32 *)open->op_verf.data, 270 &open->op_truncate, &open->op_created); 271 272 if (!status && open->op_label.len) 273 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); 274 275 /* 276 * Following rfc 3530 14.2.16, use the returned bitmask 277 * to indicate which attributes we used to store the 278 * verifier: 279 */ 280 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) 281 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | 282 FATTR4_WORD1_TIME_MODIFY); 283 } else 284 /* 285 * Note this may exit with the parent still locked. 286 * We will hold the lock until nfsd4_open's final 287 * lookup, to prevent renames or unlinks until we've had 288 * a chance to an acquire a delegation if appropriate. 289 */ 290 status = nfsd_lookup(rqstp, current_fh, 291 open->op_fname.data, open->op_fname.len, *resfh); 292 if (status) 293 goto out; 294 status = nfsd_check_obj_isreg(*resfh); 295 if (status) 296 goto out; 297 298 if (is_create_with_attrs(open) && open->op_acl != NULL) 299 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); 300 301 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); 302 accmode = NFSD_MAY_NOP; 303 if (open->op_created || 304 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 305 accmode |= NFSD_MAY_OWNER_OVERRIDE; 306 status = do_open_permission(rqstp, *resfh, open, accmode); 307 set_change_info(&open->op_cinfo, current_fh); 308 out: 309 return status; 310 } 311 312 static __be32 313 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 314 { 315 struct svc_fh *current_fh = &cstate->current_fh; 316 __be32 status; 317 int accmode = 0; 318 319 /* We don't know the target directory, and therefore can not 320 * set the change info 321 */ 322 323 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 324 325 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 326 327 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 328 (open->op_iattr.ia_size == 0); 329 /* 330 * In the delegation case, the client is telling us about an 331 * open that it *already* performed locally, some time ago. We 332 * should let it succeed now if possible. 333 * 334 * In the case of a CLAIM_FH open, on the other hand, the client 335 * may be counting on us to enforce permissions (the Linux 4.1 336 * client uses this for normal opens, for example). 337 */ 338 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 339 accmode = NFSD_MAY_OWNER_OVERRIDE; 340 341 status = do_open_permission(rqstp, current_fh, open, accmode); 342 343 return status; 344 } 345 346 static void 347 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 348 { 349 struct nfsd4_sessionid *sid = 350 (struct nfsd4_sessionid *)session->se_sessionid.data; 351 352 clid->cl_boot = sid->clientid.cl_boot; 353 clid->cl_id = sid->clientid.cl_id; 354 } 355 356 static __be32 357 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 358 struct nfsd4_open *open) 359 { 360 __be32 status; 361 struct svc_fh *resfh = NULL; 362 struct nfsd4_compoundres *resp; 363 struct net *net = SVC_NET(rqstp); 364 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 365 366 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 367 (int)open->op_fname.len, open->op_fname.data, 368 open->op_openowner); 369 370 /* This check required by spec. */ 371 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 372 return nfserr_inval; 373 374 open->op_created = 0; 375 /* 376 * RFC5661 18.51.3 377 * Before RECLAIM_COMPLETE done, server should deny new lock 378 */ 379 if (nfsd4_has_session(cstate) && 380 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 381 &cstate->session->se_client->cl_flags) && 382 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 383 return nfserr_grace; 384 385 if (nfsd4_has_session(cstate)) 386 copy_clientid(&open->op_clientid, cstate->session); 387 388 /* check seqid for replay. set nfs4_owner */ 389 resp = rqstp->rq_resp; 390 status = nfsd4_process_open1(&resp->cstate, open, nn); 391 if (status == nfserr_replay_me) { 392 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 393 fh_put(&cstate->current_fh); 394 fh_copy_shallow(&cstate->current_fh.fh_handle, 395 &rp->rp_openfh); 396 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 397 if (status) 398 dprintk("nfsd4_open: replay failed" 399 " restoring previous filehandle\n"); 400 else 401 status = nfserr_replay_me; 402 } 403 if (status) 404 goto out; 405 if (open->op_xdr_error) { 406 status = open->op_xdr_error; 407 goto out; 408 } 409 410 status = nfsd4_check_open_attributes(rqstp, cstate, open); 411 if (status) 412 goto out; 413 414 /* Openowner is now set, so sequence id will get bumped. Now we need 415 * these checks before we do any creates: */ 416 status = nfserr_grace; 417 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 418 goto out; 419 status = nfserr_no_grace; 420 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 421 goto out; 422 423 switch (open->op_claim_type) { 424 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 425 case NFS4_OPEN_CLAIM_NULL: 426 status = do_open_lookup(rqstp, cstate, open, &resfh); 427 if (status) 428 goto out; 429 break; 430 case NFS4_OPEN_CLAIM_PREVIOUS: 431 status = nfs4_check_open_reclaim(&open->op_clientid, 432 cstate, nn); 433 if (status) 434 goto out; 435 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 436 case NFS4_OPEN_CLAIM_FH: 437 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 438 status = do_open_fhandle(rqstp, cstate, open); 439 if (status) 440 goto out; 441 resfh = &cstate->current_fh; 442 break; 443 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 444 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 445 dprintk("NFSD: unsupported OPEN claim type %d\n", 446 open->op_claim_type); 447 status = nfserr_notsupp; 448 goto out; 449 default: 450 dprintk("NFSD: Invalid OPEN claim type %d\n", 451 open->op_claim_type); 452 status = nfserr_inval; 453 goto out; 454 } 455 /* 456 * nfsd4_process_open2() does the actual opening of the file. If 457 * successful, it (1) truncates the file if open->op_truncate was 458 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 459 */ 460 status = nfsd4_process_open2(rqstp, resfh, open); 461 WARN(status && open->op_created, 462 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 463 be32_to_cpu(status)); 464 out: 465 if (resfh && resfh != &cstate->current_fh) { 466 fh_dup2(&cstate->current_fh, resfh); 467 fh_put(resfh); 468 kfree(resfh); 469 } 470 nfsd4_cleanup_open_state(cstate, open, status); 471 nfsd4_bump_seqid(cstate, status); 472 return status; 473 } 474 475 /* 476 * OPEN is the only seqid-mutating operation whose decoding can fail 477 * with a seqid-mutating error (specifically, decoding of user names in 478 * the attributes). Therefore we have to do some processing to look up 479 * the stateowner so that we can bump the seqid. 480 */ 481 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 482 { 483 struct nfsd4_open *open = (struct nfsd4_open *)&op->u; 484 485 if (!seqid_mutating_err(ntohl(op->status))) 486 return op->status; 487 if (nfsd4_has_session(cstate)) 488 return op->status; 489 open->op_xdr_error = op->status; 490 return nfsd4_open(rqstp, cstate, open); 491 } 492 493 /* 494 * filehandle-manipulating ops. 495 */ 496 static __be32 497 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 498 struct svc_fh **getfh) 499 { 500 if (!cstate->current_fh.fh_dentry) 501 return nfserr_nofilehandle; 502 503 *getfh = &cstate->current_fh; 504 return nfs_ok; 505 } 506 507 static __be32 508 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 509 struct nfsd4_putfh *putfh) 510 { 511 fh_put(&cstate->current_fh); 512 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 513 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 514 putfh->pf_fhlen); 515 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 516 } 517 518 static __be32 519 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 520 void *arg) 521 { 522 __be32 status; 523 524 fh_put(&cstate->current_fh); 525 status = exp_pseudoroot(rqstp, &cstate->current_fh); 526 return status; 527 } 528 529 static __be32 530 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 531 void *arg) 532 { 533 if (!cstate->save_fh.fh_dentry) 534 return nfserr_restorefh; 535 536 fh_dup2(&cstate->current_fh, &cstate->save_fh); 537 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 538 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 539 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 540 } 541 return nfs_ok; 542 } 543 544 static __be32 545 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 546 void *arg) 547 { 548 if (!cstate->current_fh.fh_dentry) 549 return nfserr_nofilehandle; 550 551 fh_dup2(&cstate->save_fh, &cstate->current_fh); 552 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 553 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 554 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 555 } 556 return nfs_ok; 557 } 558 559 /* 560 * misc nfsv4 ops 561 */ 562 static __be32 563 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 564 struct nfsd4_access *access) 565 { 566 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 567 return nfserr_inval; 568 569 access->ac_resp_access = access->ac_req_access; 570 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 571 &access->ac_supported); 572 } 573 574 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 575 { 576 __be32 verf[2]; 577 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 578 579 /* 580 * This is opaque to client, so no need to byte-swap. Use 581 * __force to keep sparse happy 582 */ 583 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec; 584 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec; 585 memcpy(verifier->data, verf, sizeof(verifier->data)); 586 } 587 588 static __be32 589 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 590 struct nfsd4_commit *commit) 591 { 592 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 593 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 594 commit->co_count); 595 } 596 597 static __be32 598 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 599 struct nfsd4_create *create) 600 { 601 struct svc_fh resfh; 602 __be32 status; 603 dev_t rdev; 604 605 fh_init(&resfh, NFS4_FHSIZE); 606 607 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 608 NFSD_MAY_CREATE); 609 if (status) 610 return status; 611 612 status = check_attr_support(rqstp, cstate, create->cr_bmval, 613 nfsd_attrmask); 614 if (status) 615 return status; 616 617 switch (create->cr_type) { 618 case NF4LNK: 619 status = nfsd_symlink(rqstp, &cstate->current_fh, 620 create->cr_name, create->cr_namelen, 621 create->cr_data, &resfh); 622 break; 623 624 case NF4BLK: 625 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 626 if (MAJOR(rdev) != create->cr_specdata1 || 627 MINOR(rdev) != create->cr_specdata2) 628 return nfserr_inval; 629 status = nfsd_create(rqstp, &cstate->current_fh, 630 create->cr_name, create->cr_namelen, 631 &create->cr_iattr, S_IFBLK, rdev, &resfh); 632 break; 633 634 case NF4CHR: 635 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 636 if (MAJOR(rdev) != create->cr_specdata1 || 637 MINOR(rdev) != create->cr_specdata2) 638 return nfserr_inval; 639 status = nfsd_create(rqstp, &cstate->current_fh, 640 create->cr_name, create->cr_namelen, 641 &create->cr_iattr,S_IFCHR, rdev, &resfh); 642 break; 643 644 case NF4SOCK: 645 status = nfsd_create(rqstp, &cstate->current_fh, 646 create->cr_name, create->cr_namelen, 647 &create->cr_iattr, S_IFSOCK, 0, &resfh); 648 break; 649 650 case NF4FIFO: 651 status = nfsd_create(rqstp, &cstate->current_fh, 652 create->cr_name, create->cr_namelen, 653 &create->cr_iattr, S_IFIFO, 0, &resfh); 654 break; 655 656 case NF4DIR: 657 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 658 status = nfsd_create(rqstp, &cstate->current_fh, 659 create->cr_name, create->cr_namelen, 660 &create->cr_iattr, S_IFDIR, 0, &resfh); 661 break; 662 663 default: 664 status = nfserr_badtype; 665 } 666 667 if (status) 668 goto out; 669 670 if (create->cr_label.len) 671 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 672 673 if (create->cr_acl != NULL) 674 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 675 create->cr_bmval); 676 677 fh_unlock(&cstate->current_fh); 678 set_change_info(&create->cr_cinfo, &cstate->current_fh); 679 fh_dup2(&cstate->current_fh, &resfh); 680 out: 681 fh_put(&resfh); 682 return status; 683 } 684 685 static __be32 686 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 687 struct nfsd4_getattr *getattr) 688 { 689 __be32 status; 690 691 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 692 if (status) 693 return status; 694 695 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 696 return nfserr_inval; 697 698 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 699 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 700 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 701 702 getattr->ga_fhp = &cstate->current_fh; 703 return nfs_ok; 704 } 705 706 static __be32 707 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 708 struct nfsd4_link *link) 709 { 710 __be32 status = nfserr_nofilehandle; 711 712 if (!cstate->save_fh.fh_dentry) 713 return status; 714 status = nfsd_link(rqstp, &cstate->current_fh, 715 link->li_name, link->li_namelen, &cstate->save_fh); 716 if (!status) 717 set_change_info(&link->li_cinfo, &cstate->current_fh); 718 return status; 719 } 720 721 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 722 { 723 struct svc_fh tmp_fh; 724 __be32 ret; 725 726 fh_init(&tmp_fh, NFS4_FHSIZE); 727 ret = exp_pseudoroot(rqstp, &tmp_fh); 728 if (ret) 729 return ret; 730 if (tmp_fh.fh_dentry == fh->fh_dentry) { 731 fh_put(&tmp_fh); 732 return nfserr_noent; 733 } 734 fh_put(&tmp_fh); 735 return nfsd_lookup(rqstp, fh, "..", 2, fh); 736 } 737 738 static __be32 739 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 740 void *arg) 741 { 742 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 743 } 744 745 static __be32 746 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 747 struct nfsd4_lookup *lookup) 748 { 749 return nfsd_lookup(rqstp, &cstate->current_fh, 750 lookup->lo_name, lookup->lo_len, 751 &cstate->current_fh); 752 } 753 754 static __be32 755 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 756 struct nfsd4_read *read) 757 { 758 __be32 status; 759 760 /* no need to check permission - this will be done in nfsd_read() */ 761 762 read->rd_filp = NULL; 763 if (read->rd_offset >= OFFSET_MAX) 764 return nfserr_inval; 765 766 /* 767 * If we do a zero copy read, then a client will see read data 768 * that reflects the state of the file *after* performing the 769 * following compound. 770 * 771 * To ensure proper ordering, we therefore turn off zero copy if 772 * the client wants us to do more in this compound: 773 */ 774 if (!nfsd4_last_compound_op(rqstp)) 775 rqstp->rq_splice_ok = false; 776 777 /* check stateid */ 778 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 779 cstate, &read->rd_stateid, 780 RD_STATE, &read->rd_filp))) { 781 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 782 goto out; 783 } 784 status = nfs_ok; 785 out: 786 read->rd_rqstp = rqstp; 787 read->rd_fhp = &cstate->current_fh; 788 return status; 789 } 790 791 static __be32 792 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 793 struct nfsd4_readdir *readdir) 794 { 795 u64 cookie = readdir->rd_cookie; 796 static const nfs4_verifier zeroverf; 797 798 /* no need to check permission - this will be done in nfsd_readdir() */ 799 800 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 801 return nfserr_inval; 802 803 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 804 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 805 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 806 807 if ((cookie == 1) || (cookie == 2) || 808 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 809 return nfserr_bad_cookie; 810 811 readdir->rd_rqstp = rqstp; 812 readdir->rd_fhp = &cstate->current_fh; 813 return nfs_ok; 814 } 815 816 static __be32 817 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 818 struct nfsd4_readlink *readlink) 819 { 820 readlink->rl_rqstp = rqstp; 821 readlink->rl_fhp = &cstate->current_fh; 822 return nfs_ok; 823 } 824 825 static __be32 826 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 827 struct nfsd4_remove *remove) 828 { 829 __be32 status; 830 831 if (locks_in_grace(SVC_NET(rqstp))) 832 return nfserr_grace; 833 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 834 remove->rm_name, remove->rm_namelen); 835 if (!status) { 836 fh_unlock(&cstate->current_fh); 837 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 838 } 839 return status; 840 } 841 842 static __be32 843 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 844 struct nfsd4_rename *rename) 845 { 846 __be32 status = nfserr_nofilehandle; 847 848 if (!cstate->save_fh.fh_dentry) 849 return status; 850 if (locks_in_grace(SVC_NET(rqstp)) && 851 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 852 return nfserr_grace; 853 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 854 rename->rn_snamelen, &cstate->current_fh, 855 rename->rn_tname, rename->rn_tnamelen); 856 if (status) 857 return status; 858 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 859 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 860 return nfs_ok; 861 } 862 863 static __be32 864 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 865 struct nfsd4_secinfo *secinfo) 866 { 867 struct svc_fh resfh; 868 struct svc_export *exp; 869 struct dentry *dentry; 870 __be32 err; 871 872 fh_init(&resfh, NFS4_FHSIZE); 873 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 874 if (err) 875 return err; 876 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 877 secinfo->si_name, secinfo->si_namelen, 878 &exp, &dentry); 879 if (err) 880 return err; 881 if (dentry->d_inode == NULL) { 882 exp_put(exp); 883 err = nfserr_noent; 884 } else 885 secinfo->si_exp = exp; 886 dput(dentry); 887 if (cstate->minorversion) 888 /* See rfc 5661 section 2.6.3.1.1.8 */ 889 fh_put(&cstate->current_fh); 890 return err; 891 } 892 893 static __be32 894 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 895 struct nfsd4_secinfo_no_name *sin) 896 { 897 __be32 err; 898 899 switch (sin->sin_style) { 900 case NFS4_SECINFO_STYLE4_CURRENT_FH: 901 break; 902 case NFS4_SECINFO_STYLE4_PARENT: 903 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 904 if (err) 905 return err; 906 break; 907 default: 908 return nfserr_inval; 909 } 910 911 sin->sin_exp = exp_get(cstate->current_fh.fh_export); 912 fh_put(&cstate->current_fh); 913 return nfs_ok; 914 } 915 916 static __be32 917 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 918 struct nfsd4_setattr *setattr) 919 { 920 __be32 status = nfs_ok; 921 int err; 922 923 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 924 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 925 &setattr->sa_stateid, WR_STATE, NULL); 926 if (status) { 927 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 928 return status; 929 } 930 } 931 err = fh_want_write(&cstate->current_fh); 932 if (err) 933 return nfserrno(err); 934 status = nfs_ok; 935 936 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 937 nfsd_attrmask); 938 if (status) 939 goto out; 940 941 if (setattr->sa_acl != NULL) 942 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 943 setattr->sa_acl); 944 if (status) 945 goto out; 946 if (setattr->sa_label.len) 947 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 948 &setattr->sa_label); 949 if (status) 950 goto out; 951 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 952 0, (time_t)0); 953 out: 954 fh_drop_write(&cstate->current_fh); 955 return status; 956 } 957 958 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 959 { 960 int i = 1; 961 int buflen = write->wr_buflen; 962 963 vec[0].iov_base = write->wr_head.iov_base; 964 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 965 buflen -= vec[0].iov_len; 966 967 while (buflen) { 968 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 969 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 970 buflen -= vec[i].iov_len; 971 i++; 972 } 973 return i; 974 } 975 976 static __be32 977 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 978 struct nfsd4_write *write) 979 { 980 stateid_t *stateid = &write->wr_stateid; 981 struct file *filp = NULL; 982 __be32 status = nfs_ok; 983 unsigned long cnt; 984 int nvecs; 985 986 /* no need to check permission - this will be done in nfsd_write() */ 987 988 if (write->wr_offset >= OFFSET_MAX) 989 return nfserr_inval; 990 991 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 992 cstate, stateid, WR_STATE, &filp); 993 if (status) { 994 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 995 return status; 996 } 997 998 cnt = write->wr_buflen; 999 write->wr_how_written = write->wr_stable_how; 1000 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 1001 1002 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1003 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1004 1005 status = nfsd_write(rqstp, &cstate->current_fh, filp, 1006 write->wr_offset, rqstp->rq_vec, nvecs, 1007 &cnt, &write->wr_how_written); 1008 if (filp) 1009 fput(filp); 1010 1011 write->wr_bytes_written = cnt; 1012 1013 return status; 1014 } 1015 1016 static __be32 1017 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1018 struct nfsd4_seek *seek) 1019 { 1020 int whence; 1021 __be32 status; 1022 struct file *file; 1023 1024 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 1025 &seek->seek_stateid, 1026 RD_STATE, &file); 1027 if (status) { 1028 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1029 return status; 1030 } 1031 1032 switch (seek->seek_whence) { 1033 case NFS4_CONTENT_DATA: 1034 whence = SEEK_DATA; 1035 break; 1036 case NFS4_CONTENT_HOLE: 1037 whence = SEEK_HOLE; 1038 break; 1039 default: 1040 status = nfserr_union_notsupp; 1041 goto out; 1042 } 1043 1044 /* 1045 * Note: This call does change file->f_pos, but nothing in NFSD 1046 * should ever file->f_pos. 1047 */ 1048 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); 1049 if (seek->seek_pos < 0) 1050 status = nfserrno(seek->seek_pos); 1051 else if (seek->seek_pos >= i_size_read(file_inode(file))) 1052 seek->seek_eof = true; 1053 1054 out: 1055 fput(file); 1056 return status; 1057 } 1058 1059 /* This routine never returns NFS_OK! If there are no other errors, it 1060 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1061 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1062 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1063 */ 1064 static __be32 1065 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1066 struct nfsd4_verify *verify) 1067 { 1068 __be32 *buf, *p; 1069 int count; 1070 __be32 status; 1071 1072 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1073 if (status) 1074 return status; 1075 1076 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1077 if (status) 1078 return status; 1079 1080 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1081 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1082 return nfserr_inval; 1083 if (verify->ve_attrlen & 3) 1084 return nfserr_inval; 1085 1086 /* count in words: 1087 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1088 */ 1089 count = 4 + (verify->ve_attrlen >> 2); 1090 buf = kmalloc(count << 2, GFP_KERNEL); 1091 if (!buf) 1092 return nfserr_jukebox; 1093 1094 p = buf; 1095 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1096 cstate->current_fh.fh_export, 1097 cstate->current_fh.fh_dentry, 1098 verify->ve_bmval, 1099 rqstp, 0); 1100 /* 1101 * If nfsd4_encode_fattr() ran out of space, assume that's because 1102 * the attributes are longer (hence different) than those given: 1103 */ 1104 if (status == nfserr_resource) 1105 status = nfserr_not_same; 1106 if (status) 1107 goto out_kfree; 1108 1109 /* skip bitmap */ 1110 p = buf + 1 + ntohl(buf[0]); 1111 status = nfserr_not_same; 1112 if (ntohl(*p++) != verify->ve_attrlen) 1113 goto out_kfree; 1114 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1115 status = nfserr_same; 1116 1117 out_kfree: 1118 kfree(buf); 1119 return status; 1120 } 1121 1122 static __be32 1123 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1124 struct nfsd4_verify *verify) 1125 { 1126 __be32 status; 1127 1128 status = _nfsd4_verify(rqstp, cstate, verify); 1129 return status == nfserr_not_same ? nfs_ok : status; 1130 } 1131 1132 static __be32 1133 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1134 struct nfsd4_verify *verify) 1135 { 1136 __be32 status; 1137 1138 status = _nfsd4_verify(rqstp, cstate, verify); 1139 return status == nfserr_same ? nfs_ok : status; 1140 } 1141 1142 /* 1143 * NULL call. 1144 */ 1145 static __be32 1146 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1147 { 1148 return nfs_ok; 1149 } 1150 1151 static inline void nfsd4_increment_op_stats(u32 opnum) 1152 { 1153 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1154 nfsdstats.nfs4_opcount[opnum]++; 1155 } 1156 1157 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1158 void *); 1159 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1160 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1161 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1162 1163 enum nfsd4_op_flags { 1164 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1165 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1166 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1167 /* For rfc 5661 section 2.6.3.1.1: */ 1168 OP_HANDLES_WRONGSEC = 1 << 3, 1169 OP_IS_PUTFH_LIKE = 1 << 4, 1170 /* 1171 * These are the ops whose result size we estimate before 1172 * encoding, to avoid performing an op then not being able to 1173 * respond or cache a response. This includes writes and setattrs 1174 * as well as the operations usually called "nonidempotent": 1175 */ 1176 OP_MODIFIES_SOMETHING = 1 << 5, 1177 /* 1178 * Cache compounds containing these ops in the xid-based drc: 1179 * We use the DRC for compounds containing non-idempotent 1180 * operations, *except* those that are 4.1-specific (since 1181 * sessions provide their own EOS), and except for stateful 1182 * operations other than setclientid and setclientid_confirm 1183 * (since sequence numbers provide EOS for open, lock, etc in 1184 * the v4.0 case). 1185 */ 1186 OP_CACHEME = 1 << 6, 1187 /* 1188 * These are ops which clear current state id. 1189 */ 1190 OP_CLEAR_STATEID = 1 << 7, 1191 }; 1192 1193 struct nfsd4_operation { 1194 nfsd4op_func op_func; 1195 u32 op_flags; 1196 char *op_name; 1197 /* Try to get response size before operation */ 1198 nfsd4op_rsize op_rsize_bop; 1199 stateid_getter op_get_currentstateid; 1200 stateid_setter op_set_currentstateid; 1201 }; 1202 1203 static struct nfsd4_operation nfsd4_ops[]; 1204 1205 static const char *nfsd4_op_name(unsigned opnum); 1206 1207 /* 1208 * Enforce NFSv4.1 COMPOUND ordering rules: 1209 * 1210 * Also note, enforced elsewhere: 1211 * - SEQUENCE other than as first op results in 1212 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1213 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1214 * (Enforced in nfsd4_bind_conn_to_session().) 1215 * - DESTROY_SESSION must be the final operation in a compound, if 1216 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1217 * (Enforced in nfsd4_destroy_session().) 1218 */ 1219 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1220 { 1221 struct nfsd4_op *op = &args->ops[0]; 1222 1223 /* These ordering requirements don't apply to NFSv4.0: */ 1224 if (args->minorversion == 0) 1225 return nfs_ok; 1226 /* This is weird, but OK, not our problem: */ 1227 if (args->opcnt == 0) 1228 return nfs_ok; 1229 if (op->status == nfserr_op_illegal) 1230 return nfs_ok; 1231 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1232 return nfserr_op_not_in_session; 1233 if (op->opnum == OP_SEQUENCE) 1234 return nfs_ok; 1235 if (args->opcnt != 1) 1236 return nfserr_not_only_op; 1237 return nfs_ok; 1238 } 1239 1240 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1241 { 1242 return &nfsd4_ops[op->opnum]; 1243 } 1244 1245 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1246 { 1247 if (op->opnum == OP_ILLEGAL) 1248 return false; 1249 return OPDESC(op)->op_flags & OP_CACHEME; 1250 } 1251 1252 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1253 { 1254 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1255 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1256 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1257 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1258 struct nfsd4_operation *thisd; 1259 struct nfsd4_operation *nextd; 1260 1261 thisd = OPDESC(this); 1262 /* 1263 * Most ops check wronsec on our own; only the putfh-like ops 1264 * have special rules. 1265 */ 1266 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1267 return false; 1268 /* 1269 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1270 * put-filehandle operation if we're not going to use the 1271 * result: 1272 */ 1273 if (argp->opcnt == resp->opcnt) 1274 return false; 1275 1276 nextd = OPDESC(next); 1277 /* 1278 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1279 * errors themselves as necessary; others should check for them 1280 * now: 1281 */ 1282 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1283 } 1284 1285 static void svcxdr_init_encode(struct svc_rqst *rqstp, 1286 struct nfsd4_compoundres *resp) 1287 { 1288 struct xdr_stream *xdr = &resp->xdr; 1289 struct xdr_buf *buf = &rqstp->rq_res; 1290 struct kvec *head = buf->head; 1291 1292 xdr->buf = buf; 1293 xdr->iov = head; 1294 xdr->p = head->iov_base + head->iov_len; 1295 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1296 /* Tail and page_len should be zero at this point: */ 1297 buf->len = buf->head[0].iov_len; 1298 xdr->scratch.iov_len = 0; 1299 xdr->page_ptr = buf->pages - 1; 1300 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1301 - rqstp->rq_auth_slack; 1302 } 1303 1304 /* 1305 * COMPOUND call. 1306 */ 1307 static __be32 1308 nfsd4_proc_compound(struct svc_rqst *rqstp, 1309 struct nfsd4_compoundargs *args, 1310 struct nfsd4_compoundres *resp) 1311 { 1312 struct nfsd4_op *op; 1313 struct nfsd4_operation *opdesc; 1314 struct nfsd4_compound_state *cstate = &resp->cstate; 1315 struct svc_fh *current_fh = &cstate->current_fh; 1316 struct svc_fh *save_fh = &cstate->save_fh; 1317 __be32 status; 1318 1319 svcxdr_init_encode(rqstp, resp); 1320 resp->tagp = resp->xdr.p; 1321 /* reserve space for: taglen, tag, and opcnt */ 1322 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1323 resp->taglen = args->taglen; 1324 resp->tag = args->tag; 1325 resp->rqstp = rqstp; 1326 cstate->minorversion = args->minorversion; 1327 fh_init(current_fh, NFS4_FHSIZE); 1328 fh_init(save_fh, NFS4_FHSIZE); 1329 /* 1330 * Don't use the deferral mechanism for NFSv4; compounds make it 1331 * too hard to avoid non-idempotency problems. 1332 */ 1333 rqstp->rq_usedeferral = false; 1334 1335 /* 1336 * According to RFC3010, this takes precedence over all other errors. 1337 */ 1338 status = nfserr_minor_vers_mismatch; 1339 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1340 goto out; 1341 1342 status = nfs41_check_op_ordering(args); 1343 if (status) { 1344 op = &args->ops[0]; 1345 op->status = status; 1346 goto encode_op; 1347 } 1348 1349 while (!status && resp->opcnt < args->opcnt) { 1350 op = &args->ops[resp->opcnt++]; 1351 1352 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1353 resp->opcnt, args->opcnt, op->opnum, 1354 nfsd4_op_name(op->opnum)); 1355 /* 1356 * The XDR decode routines may have pre-set op->status; 1357 * for example, if there is a miscellaneous XDR error 1358 * it will be set to nfserr_bad_xdr. 1359 */ 1360 if (op->status) { 1361 if (op->opnum == OP_OPEN) 1362 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1363 goto encode_op; 1364 } 1365 1366 opdesc = OPDESC(op); 1367 1368 if (!current_fh->fh_dentry) { 1369 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1370 op->status = nfserr_nofilehandle; 1371 goto encode_op; 1372 } 1373 } else if (current_fh->fh_export->ex_fslocs.migrated && 1374 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1375 op->status = nfserr_moved; 1376 goto encode_op; 1377 } 1378 1379 fh_clear_wcc(current_fh); 1380 1381 /* If op is non-idempotent */ 1382 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1383 /* 1384 * Don't execute this op if we couldn't encode a 1385 * succesful reply: 1386 */ 1387 u32 plen = opdesc->op_rsize_bop(rqstp, op); 1388 /* 1389 * Plus if there's another operation, make sure 1390 * we'll have space to at least encode an error: 1391 */ 1392 if (resp->opcnt < args->opcnt) 1393 plen += COMPOUND_ERR_SLACK_SPACE; 1394 op->status = nfsd4_check_resp_size(resp, plen); 1395 } 1396 1397 if (op->status) 1398 goto encode_op; 1399 1400 if (opdesc->op_get_currentstateid) 1401 opdesc->op_get_currentstateid(cstate, &op->u); 1402 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1403 1404 if (!op->status) { 1405 if (opdesc->op_set_currentstateid) 1406 opdesc->op_set_currentstateid(cstate, &op->u); 1407 1408 if (opdesc->op_flags & OP_CLEAR_STATEID) 1409 clear_current_stateid(cstate); 1410 1411 if (need_wrongsec_check(rqstp)) 1412 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 1413 } 1414 1415 encode_op: 1416 /* Only from SEQUENCE */ 1417 if (cstate->status == nfserr_replay_cache) { 1418 dprintk("%s NFS4.1 replay from cache\n", __func__); 1419 status = op->status; 1420 goto out; 1421 } 1422 if (op->status == nfserr_replay_me) { 1423 op->replay = &cstate->replay_owner->so_replay; 1424 nfsd4_encode_replay(&resp->xdr, op); 1425 status = op->status = op->replay->rp_status; 1426 } else { 1427 nfsd4_encode_operation(resp, op); 1428 status = op->status; 1429 } 1430 1431 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1432 args->ops, args->opcnt, resp->opcnt, op->opnum, 1433 be32_to_cpu(status)); 1434 1435 nfsd4_cstate_clear_replay(cstate); 1436 /* XXX Ugh, we need to get rid of this kind of special case: */ 1437 if (op->opnum == OP_READ && op->u.read.rd_filp) 1438 fput(op->u.read.rd_filp); 1439 1440 nfsd4_increment_op_stats(op->opnum); 1441 } 1442 1443 cstate->status = status; 1444 fh_put(current_fh); 1445 fh_put(save_fh); 1446 BUG_ON(cstate->replay_owner); 1447 out: 1448 /* Reset deferral mechanism for RPC deferrals */ 1449 rqstp->rq_usedeferral = true; 1450 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1451 return status; 1452 } 1453 1454 #define op_encode_hdr_size (2) 1455 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1456 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1457 #define op_encode_change_info_maxsz (5) 1458 #define nfs4_fattr_bitmap_maxsz (4) 1459 1460 /* We'll fall back on returning no lockowner if run out of space: */ 1461 #define op_encode_lockowner_maxsz (0) 1462 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1463 1464 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1465 1466 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1467 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1468 op_encode_ace_maxsz) 1469 1470 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1471 1472 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1473 { 1474 return (op_encode_hdr_size) * sizeof(__be32); 1475 } 1476 1477 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1478 { 1479 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1480 } 1481 1482 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1483 { 1484 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1485 } 1486 1487 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1488 { 1489 return (op_encode_hdr_size + op_encode_change_info_maxsz 1490 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1491 } 1492 1493 /* 1494 * Note since this is an idempotent operation we won't insist on failing 1495 * the op prematurely if the estimate is too large. We may turn off splice 1496 * reads unnecessarily. 1497 */ 1498 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1499 struct nfsd4_op *op) 1500 { 1501 u32 *bmap = op->u.getattr.ga_bmval; 1502 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1503 u32 ret = 0; 1504 1505 if (bmap0 & FATTR4_WORD0_ACL) 1506 return svc_max_payload(rqstp); 1507 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1508 return svc_max_payload(rqstp); 1509 1510 if (bmap1 & FATTR4_WORD1_OWNER) { 1511 ret += IDMAP_NAMESZ + 4; 1512 bmap1 &= ~FATTR4_WORD1_OWNER; 1513 } 1514 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1515 ret += IDMAP_NAMESZ + 4; 1516 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1517 } 1518 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1519 ret += NFS4_FHSIZE + 4; 1520 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1521 } 1522 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1523 ret += NFSD4_MAX_SEC_LABEL_LEN + 12; 1524 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1525 } 1526 /* 1527 * Largest of remaining attributes are 16 bytes (e.g., 1528 * supported_attributes) 1529 */ 1530 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1531 /* bitmask, length */ 1532 ret += 20; 1533 return ret; 1534 } 1535 1536 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1537 { 1538 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1539 * sizeof(__be32); 1540 } 1541 1542 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1543 { 1544 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1545 * sizeof(__be32); 1546 } 1547 1548 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1549 { 1550 return (op_encode_hdr_size + op_encode_stateid_maxsz 1551 + op_encode_change_info_maxsz + 1 1552 + nfs4_fattr_bitmap_maxsz 1553 + op_encode_delegation_maxsz) * sizeof(__be32); 1554 } 1555 1556 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1557 { 1558 u32 maxcount = 0, rlen = 0; 1559 1560 maxcount = svc_max_payload(rqstp); 1561 rlen = min(op->u.read.rd_length, maxcount); 1562 1563 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1564 } 1565 1566 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1567 { 1568 u32 maxcount = 0, rlen = 0; 1569 1570 maxcount = svc_max_payload(rqstp); 1571 rlen = min(op->u.readdir.rd_maxcount, maxcount); 1572 1573 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1574 XDR_QUADLEN(rlen)) * sizeof(__be32); 1575 } 1576 1577 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1578 { 1579 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1580 * sizeof(__be32); 1581 } 1582 1583 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1584 { 1585 return (op_encode_hdr_size + op_encode_change_info_maxsz 1586 + op_encode_change_info_maxsz) * sizeof(__be32); 1587 } 1588 1589 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1590 struct nfsd4_op *op) 1591 { 1592 return NFS4_MAX_SESSIONID_LEN + 20; 1593 } 1594 1595 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1596 { 1597 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1598 } 1599 1600 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1601 { 1602 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1603 sizeof(__be32); 1604 } 1605 1606 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1607 { 1608 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 1609 } 1610 1611 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1612 { 1613 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1614 1 + 1 + /* eir_flags, spr_how */\ 1615 4 + /* spo_must_enforce & _allow with bitmap */\ 1616 2 + /*eir_server_owner.so_minor_id */\ 1617 /* eir_server_owner.so_major_id<> */\ 1618 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1619 /* eir_server_scope<> */\ 1620 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1621 1 + /* eir_server_impl_id array length */\ 1622 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1623 } 1624 1625 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1626 { 1627 return (op_encode_hdr_size + \ 1628 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1629 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1630 } 1631 1632 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1633 { 1634 return (op_encode_hdr_size + \ 1635 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1636 2 + /* csr_sequence, csr_flags */\ 1637 op_encode_channel_attrs_maxsz + \ 1638 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1639 } 1640 1641 static struct nfsd4_operation nfsd4_ops[] = { 1642 [OP_ACCESS] = { 1643 .op_func = (nfsd4op_func)nfsd4_access, 1644 .op_name = "OP_ACCESS", 1645 }, 1646 [OP_CLOSE] = { 1647 .op_func = (nfsd4op_func)nfsd4_close, 1648 .op_flags = OP_MODIFIES_SOMETHING, 1649 .op_name = "OP_CLOSE", 1650 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1651 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 1652 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 1653 }, 1654 [OP_COMMIT] = { 1655 .op_func = (nfsd4op_func)nfsd4_commit, 1656 .op_flags = OP_MODIFIES_SOMETHING, 1657 .op_name = "OP_COMMIT", 1658 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 1659 }, 1660 [OP_CREATE] = { 1661 .op_func = (nfsd4op_func)nfsd4_create, 1662 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 1663 .op_name = "OP_CREATE", 1664 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 1665 }, 1666 [OP_DELEGRETURN] = { 1667 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1668 .op_flags = OP_MODIFIES_SOMETHING, 1669 .op_name = "OP_DELEGRETURN", 1670 .op_rsize_bop = nfsd4_only_status_rsize, 1671 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 1672 }, 1673 [OP_GETATTR] = { 1674 .op_func = (nfsd4op_func)nfsd4_getattr, 1675 .op_flags = ALLOWED_ON_ABSENT_FS, 1676 .op_rsize_bop = nfsd4_getattr_rsize, 1677 .op_name = "OP_GETATTR", 1678 }, 1679 [OP_GETFH] = { 1680 .op_func = (nfsd4op_func)nfsd4_getfh, 1681 .op_name = "OP_GETFH", 1682 }, 1683 [OP_LINK] = { 1684 .op_func = (nfsd4op_func)nfsd4_link, 1685 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 1686 | OP_CACHEME, 1687 .op_name = "OP_LINK", 1688 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 1689 }, 1690 [OP_LOCK] = { 1691 .op_func = (nfsd4op_func)nfsd4_lock, 1692 .op_flags = OP_MODIFIES_SOMETHING, 1693 .op_name = "OP_LOCK", 1694 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 1695 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 1696 }, 1697 [OP_LOCKT] = { 1698 .op_func = (nfsd4op_func)nfsd4_lockt, 1699 .op_name = "OP_LOCKT", 1700 }, 1701 [OP_LOCKU] = { 1702 .op_func = (nfsd4op_func)nfsd4_locku, 1703 .op_flags = OP_MODIFIES_SOMETHING, 1704 .op_name = "OP_LOCKU", 1705 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1706 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 1707 }, 1708 [OP_LOOKUP] = { 1709 .op_func = (nfsd4op_func)nfsd4_lookup, 1710 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1711 .op_name = "OP_LOOKUP", 1712 }, 1713 [OP_LOOKUPP] = { 1714 .op_func = (nfsd4op_func)nfsd4_lookupp, 1715 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 1716 .op_name = "OP_LOOKUPP", 1717 }, 1718 [OP_NVERIFY] = { 1719 .op_func = (nfsd4op_func)nfsd4_nverify, 1720 .op_name = "OP_NVERIFY", 1721 }, 1722 [OP_OPEN] = { 1723 .op_func = (nfsd4op_func)nfsd4_open, 1724 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1725 .op_name = "OP_OPEN", 1726 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 1727 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 1728 }, 1729 [OP_OPEN_CONFIRM] = { 1730 .op_func = (nfsd4op_func)nfsd4_open_confirm, 1731 .op_flags = OP_MODIFIES_SOMETHING, 1732 .op_name = "OP_OPEN_CONFIRM", 1733 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1734 }, 1735 [OP_OPEN_DOWNGRADE] = { 1736 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 1737 .op_flags = OP_MODIFIES_SOMETHING, 1738 .op_name = "OP_OPEN_DOWNGRADE", 1739 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1740 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 1741 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 1742 }, 1743 [OP_PUTFH] = { 1744 .op_func = (nfsd4op_func)nfsd4_putfh, 1745 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1746 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 1747 .op_name = "OP_PUTFH", 1748 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1749 }, 1750 [OP_PUTPUBFH] = { 1751 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1752 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1753 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 1754 .op_name = "OP_PUTPUBFH", 1755 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1756 }, 1757 [OP_PUTROOTFH] = { 1758 .op_func = (nfsd4op_func)nfsd4_putrootfh, 1759 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1760 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 1761 .op_name = "OP_PUTROOTFH", 1762 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1763 }, 1764 [OP_READ] = { 1765 .op_func = (nfsd4op_func)nfsd4_read, 1766 .op_name = "OP_READ", 1767 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 1768 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 1769 }, 1770 [OP_READDIR] = { 1771 .op_func = (nfsd4op_func)nfsd4_readdir, 1772 .op_name = "OP_READDIR", 1773 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 1774 }, 1775 [OP_READLINK] = { 1776 .op_func = (nfsd4op_func)nfsd4_readlink, 1777 .op_name = "OP_READLINK", 1778 }, 1779 [OP_REMOVE] = { 1780 .op_func = (nfsd4op_func)nfsd4_remove, 1781 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1782 .op_name = "OP_REMOVE", 1783 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 1784 }, 1785 [OP_RENAME] = { 1786 .op_func = (nfsd4op_func)nfsd4_rename, 1787 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1788 .op_name = "OP_RENAME", 1789 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 1790 }, 1791 [OP_RENEW] = { 1792 .op_func = (nfsd4op_func)nfsd4_renew, 1793 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1794 | OP_MODIFIES_SOMETHING, 1795 .op_name = "OP_RENEW", 1796 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1797 1798 }, 1799 [OP_RESTOREFH] = { 1800 .op_func = (nfsd4op_func)nfsd4_restorefh, 1801 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1802 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 1803 .op_name = "OP_RESTOREFH", 1804 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1805 }, 1806 [OP_SAVEFH] = { 1807 .op_func = (nfsd4op_func)nfsd4_savefh, 1808 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 1809 .op_name = "OP_SAVEFH", 1810 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1811 }, 1812 [OP_SECINFO] = { 1813 .op_func = (nfsd4op_func)nfsd4_secinfo, 1814 .op_flags = OP_HANDLES_WRONGSEC, 1815 .op_name = "OP_SECINFO", 1816 }, 1817 [OP_SETATTR] = { 1818 .op_func = (nfsd4op_func)nfsd4_setattr, 1819 .op_name = "OP_SETATTR", 1820 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1821 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 1822 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 1823 }, 1824 [OP_SETCLIENTID] = { 1825 .op_func = (nfsd4op_func)nfsd4_setclientid, 1826 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1827 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1828 .op_name = "OP_SETCLIENTID", 1829 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 1830 }, 1831 [OP_SETCLIENTID_CONFIRM] = { 1832 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 1833 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1834 | OP_MODIFIES_SOMETHING | OP_CACHEME, 1835 .op_name = "OP_SETCLIENTID_CONFIRM", 1836 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1837 }, 1838 [OP_VERIFY] = { 1839 .op_func = (nfsd4op_func)nfsd4_verify, 1840 .op_name = "OP_VERIFY", 1841 }, 1842 [OP_WRITE] = { 1843 .op_func = (nfsd4op_func)nfsd4_write, 1844 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 1845 .op_name = "OP_WRITE", 1846 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 1847 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 1848 }, 1849 [OP_RELEASE_LOCKOWNER] = { 1850 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 1851 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 1852 | OP_MODIFIES_SOMETHING, 1853 .op_name = "OP_RELEASE_LOCKOWNER", 1854 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1855 }, 1856 1857 /* NFSv4.1 operations */ 1858 [OP_EXCHANGE_ID] = { 1859 .op_func = (nfsd4op_func)nfsd4_exchange_id, 1860 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1861 | OP_MODIFIES_SOMETHING, 1862 .op_name = "OP_EXCHANGE_ID", 1863 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 1864 }, 1865 [OP_BACKCHANNEL_CTL] = { 1866 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 1867 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1868 .op_name = "OP_BACKCHANNEL_CTL", 1869 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1870 }, 1871 [OP_BIND_CONN_TO_SESSION] = { 1872 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 1873 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1874 | OP_MODIFIES_SOMETHING, 1875 .op_name = "OP_BIND_CONN_TO_SESSION", 1876 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 1877 }, 1878 [OP_CREATE_SESSION] = { 1879 .op_func = (nfsd4op_func)nfsd4_create_session, 1880 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1881 | OP_MODIFIES_SOMETHING, 1882 .op_name = "OP_CREATE_SESSION", 1883 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 1884 }, 1885 [OP_DESTROY_SESSION] = { 1886 .op_func = (nfsd4op_func)nfsd4_destroy_session, 1887 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1888 | OP_MODIFIES_SOMETHING, 1889 .op_name = "OP_DESTROY_SESSION", 1890 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1891 }, 1892 [OP_SEQUENCE] = { 1893 .op_func = (nfsd4op_func)nfsd4_sequence, 1894 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 1895 .op_name = "OP_SEQUENCE", 1896 }, 1897 [OP_DESTROY_CLIENTID] = { 1898 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 1899 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 1900 | OP_MODIFIES_SOMETHING, 1901 .op_name = "OP_DESTROY_CLIENTID", 1902 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1903 }, 1904 [OP_RECLAIM_COMPLETE] = { 1905 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 1906 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1907 .op_name = "OP_RECLAIM_COMPLETE", 1908 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1909 }, 1910 [OP_SECINFO_NO_NAME] = { 1911 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 1912 .op_flags = OP_HANDLES_WRONGSEC, 1913 .op_name = "OP_SECINFO_NO_NAME", 1914 }, 1915 [OP_TEST_STATEID] = { 1916 .op_func = (nfsd4op_func)nfsd4_test_stateid, 1917 .op_flags = ALLOWED_WITHOUT_FH, 1918 .op_name = "OP_TEST_STATEID", 1919 }, 1920 [OP_FREE_STATEID] = { 1921 .op_func = (nfsd4op_func)nfsd4_free_stateid, 1922 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 1923 .op_name = "OP_FREE_STATEID", 1924 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 1925 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 1926 }, 1927 1928 /* NFSv4.2 operations */ 1929 [OP_SEEK] = { 1930 .op_func = (nfsd4op_func)nfsd4_seek, 1931 .op_name = "OP_SEEK", 1932 }, 1933 }; 1934 1935 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 1936 { 1937 struct nfsd4_operation *opdesc; 1938 nfsd4op_rsize estimator; 1939 1940 if (op->opnum == OP_ILLEGAL) 1941 return op_encode_hdr_size * sizeof(__be32); 1942 opdesc = OPDESC(op); 1943 estimator = opdesc->op_rsize_bop; 1944 return estimator ? estimator(rqstp, op) : PAGE_SIZE; 1945 } 1946 1947 void warn_on_nonidempotent_op(struct nfsd4_op *op) 1948 { 1949 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 1950 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 1951 op->opnum, nfsd4_op_name(op->opnum)); 1952 WARN_ON_ONCE(1); 1953 } 1954 } 1955 1956 static const char *nfsd4_op_name(unsigned opnum) 1957 { 1958 if (opnum < ARRAY_SIZE(nfsd4_ops)) 1959 return nfsd4_ops[opnum].op_name; 1960 return "unknown_operation"; 1961 } 1962 1963 #define nfsd4_voidres nfsd4_voidargs 1964 struct nfsd4_voidargs { int dummy; }; 1965 1966 static struct svc_procedure nfsd_procedures4[2] = { 1967 [NFSPROC4_NULL] = { 1968 .pc_func = (svc_procfunc) nfsd4_proc_null, 1969 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 1970 .pc_argsize = sizeof(struct nfsd4_voidargs), 1971 .pc_ressize = sizeof(struct nfsd4_voidres), 1972 .pc_cachetype = RC_NOCACHE, 1973 .pc_xdrressize = 1, 1974 }, 1975 [NFSPROC4_COMPOUND] = { 1976 .pc_func = (svc_procfunc) nfsd4_proc_compound, 1977 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 1978 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 1979 .pc_argsize = sizeof(struct nfsd4_compoundargs), 1980 .pc_ressize = sizeof(struct nfsd4_compoundres), 1981 .pc_release = nfsd4_release_compoundargs, 1982 .pc_cachetype = RC_NOCACHE, 1983 .pc_xdrressize = NFSD_BUFSIZE/4, 1984 }, 1985 }; 1986 1987 struct svc_version nfsd_version4 = { 1988 .vs_vers = 4, 1989 .vs_nproc = 2, 1990 .vs_proc = nfsd_procedures4, 1991 .vs_dispatch = nfsd_dispatch, 1992 .vs_xdrsize = NFS4_SVC_XDRSIZE, 1993 .vs_rpcb_optnl = 1, 1994 }; 1995 1996 /* 1997 * Local variables: 1998 * c-basic-offset: 8 1999 * End: 2000 */ 2001