1 /* 2 * Server-side procedures for NFSv4. 3 * 4 * Copyright (c) 2002 The Regents of the University of Michigan. 5 * All rights reserved. 6 * 7 * Kendrick Smith <kmsmith@umich.edu> 8 * Andy Adamson <andros@umich.edu> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 #include <linux/file.h> 36 #include <linux/falloc.h> 37 #include <linux/slab.h> 38 39 #include "idmap.h" 40 #include "cache.h" 41 #include "xdr4.h" 42 #include "vfs.h" 43 #include "current_stateid.h" 44 #include "netns.h" 45 #include "acl.h" 46 #include "pnfs.h" 47 #include "trace.h" 48 49 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 50 #include <linux/security.h> 51 52 static inline void 53 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 54 { 55 struct inode *inode = d_inode(resfh->fh_dentry); 56 int status; 57 58 inode_lock(inode); 59 status = security_inode_setsecctx(resfh->fh_dentry, 60 label->data, label->len); 61 inode_unlock(inode); 62 63 if (status) 64 /* 65 * XXX: We should really fail the whole open, but we may 66 * already have created a new file, so it may be too 67 * late. For now this seems the least of evils: 68 */ 69 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 70 71 return; 72 } 73 #else 74 static inline void 75 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 76 { } 77 #endif 78 79 #define NFSDDBG_FACILITY NFSDDBG_PROC 80 81 static u32 nfsd_attrmask[] = { 82 NFSD_WRITEABLE_ATTRS_WORD0, 83 NFSD_WRITEABLE_ATTRS_WORD1, 84 NFSD_WRITEABLE_ATTRS_WORD2 85 }; 86 87 static u32 nfsd41_ex_attrmask[] = { 88 NFSD_SUPPATTR_EXCLCREAT_WORD0, 89 NFSD_SUPPATTR_EXCLCREAT_WORD1, 90 NFSD_SUPPATTR_EXCLCREAT_WORD2 91 }; 92 93 static __be32 94 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 95 u32 *bmval, u32 *writable) 96 { 97 struct dentry *dentry = cstate->current_fh.fh_dentry; 98 99 /* 100 * Check about attributes are supported by the NFSv4 server or not. 101 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. 102 */ 103 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || 104 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || 105 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) 106 return nfserr_attrnotsupp; 107 108 /* 109 * Check FATTR4_WORD0_ACL can be supported 110 * in current environment or not. 111 */ 112 if (bmval[0] & FATTR4_WORD0_ACL) { 113 if (!IS_POSIXACL(d_inode(dentry))) 114 return nfserr_attrnotsupp; 115 } 116 117 /* 118 * According to spec, read-only attributes return ERR_INVAL. 119 */ 120 if (writable) { 121 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || 122 (bmval[2] & ~writable[2])) 123 return nfserr_inval; 124 } 125 126 return nfs_ok; 127 } 128 129 static __be32 130 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 131 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 132 { 133 __be32 status = nfs_ok; 134 135 if (open->op_create == NFS4_OPEN_CREATE) { 136 if (open->op_createmode == NFS4_CREATE_UNCHECKED 137 || open->op_createmode == NFS4_CREATE_GUARDED) 138 status = check_attr_support(rqstp, cstate, 139 open->op_bmval, nfsd_attrmask); 140 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 141 status = check_attr_support(rqstp, cstate, 142 open->op_bmval, nfsd41_ex_attrmask); 143 } 144 145 return status; 146 } 147 148 static int 149 is_create_with_attrs(struct nfsd4_open *open) 150 { 151 return open->op_create == NFS4_OPEN_CREATE 152 && (open->op_createmode == NFS4_CREATE_UNCHECKED 153 || open->op_createmode == NFS4_CREATE_GUARDED 154 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 155 } 156 157 /* 158 * if error occurs when setting the acl, just clear the acl bit 159 * in the returned attr bitmap. 160 */ 161 static void 162 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 163 struct nfs4_acl *acl, u32 *bmval) 164 { 165 __be32 status; 166 167 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 168 if (status) 169 /* 170 * We should probably fail the whole open at this point, 171 * but we've already created the file, so it's too late; 172 * So this seems the least of evils: 173 */ 174 bmval[0] &= ~FATTR4_WORD0_ACL; 175 } 176 177 static inline void 178 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 179 { 180 fh_put(dst); 181 dget(src->fh_dentry); 182 if (src->fh_export) 183 exp_get(src->fh_export); 184 *dst = *src; 185 } 186 187 static __be32 188 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 189 { 190 __be32 status; 191 192 if (open->op_truncate && 193 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 194 return nfserr_inval; 195 196 accmode |= NFSD_MAY_READ_IF_EXEC; 197 198 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 199 accmode |= NFSD_MAY_READ; 200 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 201 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 202 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 203 accmode |= NFSD_MAY_WRITE; 204 205 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 206 207 return status; 208 } 209 210 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 211 { 212 umode_t mode = d_inode(fh->fh_dentry)->i_mode; 213 214 if (S_ISREG(mode)) 215 return nfs_ok; 216 if (S_ISDIR(mode)) 217 return nfserr_isdir; 218 /* 219 * Using err_symlink as our catch-all case may look odd; but 220 * there's no other obvious error for this case in 4.0, and we 221 * happen to know that it will cause the linux v4 client to do 222 * the right thing on attempts to open something other than a 223 * regular file. 224 */ 225 return nfserr_symlink; 226 } 227 228 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 229 { 230 if (nfsd4_has_session(cstate)) 231 return; 232 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 233 &resfh->fh_handle); 234 } 235 236 static __be32 237 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) 238 { 239 struct svc_fh *current_fh = &cstate->current_fh; 240 int accmode; 241 __be32 status; 242 243 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 244 if (!*resfh) 245 return nfserr_jukebox; 246 fh_init(*resfh, NFS4_FHSIZE); 247 open->op_truncate = 0; 248 249 if (open->op_create) { 250 /* FIXME: check session persistence and pnfs flags. 251 * The nfsv4.1 spec requires the following semantics: 252 * 253 * Persistent | pNFS | Server REQUIRED | Client Allowed 254 * Reply Cache | server | | 255 * -------------+--------+-----------------+-------------------- 256 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 257 * | | | (SHOULD) 258 * | | and EXCLUSIVE4 | or EXCLUSIVE4 259 * | | | (SHOULD NOT) 260 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 261 * yes | no | GUARDED4 | GUARDED4 262 * yes | yes | GUARDED4 | GUARDED4 263 */ 264 265 /* 266 * Note: create modes (UNCHECKED,GUARDED...) are the same 267 * in NFSv4 as in v3 except EXCLUSIVE4_1. 268 */ 269 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, 270 open->op_fname.len, &open->op_iattr, 271 *resfh, open->op_createmode, 272 (u32 *)open->op_verf.data, 273 &open->op_truncate, &open->op_created); 274 275 if (!status && open->op_label.len) 276 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); 277 278 /* 279 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4 280 * use the returned bitmask to indicate which attributes 281 * we used to store the verifier: 282 */ 283 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0) 284 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS | 285 FATTR4_WORD1_TIME_MODIFY); 286 } else 287 /* 288 * Note this may exit with the parent still locked. 289 * We will hold the lock until nfsd4_open's final 290 * lookup, to prevent renames or unlinks until we've had 291 * a chance to an acquire a delegation if appropriate. 292 */ 293 status = nfsd_lookup(rqstp, current_fh, 294 open->op_fname.data, open->op_fname.len, *resfh); 295 if (status) 296 goto out; 297 status = nfsd_check_obj_isreg(*resfh); 298 if (status) 299 goto out; 300 301 if (is_create_with_attrs(open) && open->op_acl != NULL) 302 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); 303 304 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); 305 accmode = NFSD_MAY_NOP; 306 if (open->op_created || 307 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 308 accmode |= NFSD_MAY_OWNER_OVERRIDE; 309 status = do_open_permission(rqstp, *resfh, open, accmode); 310 set_change_info(&open->op_cinfo, current_fh); 311 out: 312 return status; 313 } 314 315 static __be32 316 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 317 { 318 struct svc_fh *current_fh = &cstate->current_fh; 319 __be32 status; 320 int accmode = 0; 321 322 /* We don't know the target directory, and therefore can not 323 * set the change info 324 */ 325 326 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 327 328 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 329 330 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 331 (open->op_iattr.ia_size == 0); 332 /* 333 * In the delegation case, the client is telling us about an 334 * open that it *already* performed locally, some time ago. We 335 * should let it succeed now if possible. 336 * 337 * In the case of a CLAIM_FH open, on the other hand, the client 338 * may be counting on us to enforce permissions (the Linux 4.1 339 * client uses this for normal opens, for example). 340 */ 341 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 342 accmode = NFSD_MAY_OWNER_OVERRIDE; 343 344 status = do_open_permission(rqstp, current_fh, open, accmode); 345 346 return status; 347 } 348 349 static void 350 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 351 { 352 struct nfsd4_sessionid *sid = 353 (struct nfsd4_sessionid *)session->se_sessionid.data; 354 355 clid->cl_boot = sid->clientid.cl_boot; 356 clid->cl_id = sid->clientid.cl_id; 357 } 358 359 static __be32 360 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 361 struct nfsd4_open *open) 362 { 363 __be32 status; 364 struct svc_fh *resfh = NULL; 365 struct net *net = SVC_NET(rqstp); 366 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 367 368 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 369 (int)open->op_fname.len, open->op_fname.data, 370 open->op_openowner); 371 372 /* This check required by spec. */ 373 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 374 return nfserr_inval; 375 376 open->op_created = 0; 377 /* 378 * RFC5661 18.51.3 379 * Before RECLAIM_COMPLETE done, server should deny new lock 380 */ 381 if (nfsd4_has_session(cstate) && 382 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 383 &cstate->session->se_client->cl_flags) && 384 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 385 return nfserr_grace; 386 387 if (nfsd4_has_session(cstate)) 388 copy_clientid(&open->op_clientid, cstate->session); 389 390 /* check seqid for replay. set nfs4_owner */ 391 status = nfsd4_process_open1(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 (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 419 goto out; 420 status = nfserr_no_grace; 421 if (!opens_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); 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, NFSD_MAY_NOP); 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 read->rd_filp = NULL; 761 if (read->rd_offset >= OFFSET_MAX) 762 return nfserr_inval; 763 764 /* 765 * If we do a zero copy read, then a client will see read data 766 * that reflects the state of the file *after* performing the 767 * following compound. 768 * 769 * To ensure proper ordering, we therefore turn off zero copy if 770 * the client wants us to do more in this compound: 771 */ 772 if (!nfsd4_last_compound_op(rqstp)) 773 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 774 775 /* check stateid */ 776 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 777 &read->rd_stateid, RD_STATE, 778 &read->rd_filp, &read->rd_tmp_file); 779 if (status) { 780 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 781 goto out; 782 } 783 status = nfs_ok; 784 out: 785 read->rd_rqstp = rqstp; 786 read->rd_fhp = &cstate->current_fh; 787 return status; 788 } 789 790 static __be32 791 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 792 struct nfsd4_readdir *readdir) 793 { 794 u64 cookie = readdir->rd_cookie; 795 static const nfs4_verifier zeroverf; 796 797 /* no need to check permission - this will be done in nfsd_readdir() */ 798 799 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 800 return nfserr_inval; 801 802 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 803 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 804 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 805 806 if ((cookie == 1) || (cookie == 2) || 807 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 808 return nfserr_bad_cookie; 809 810 readdir->rd_rqstp = rqstp; 811 readdir->rd_fhp = &cstate->current_fh; 812 return nfs_ok; 813 } 814 815 static __be32 816 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 817 struct nfsd4_readlink *readlink) 818 { 819 readlink->rl_rqstp = rqstp; 820 readlink->rl_fhp = &cstate->current_fh; 821 return nfs_ok; 822 } 823 824 static __be32 825 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 826 struct nfsd4_remove *remove) 827 { 828 __be32 status; 829 830 if (opens_in_grace(SVC_NET(rqstp))) 831 return nfserr_grace; 832 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 833 remove->rm_name, remove->rm_namelen); 834 if (!status) { 835 fh_unlock(&cstate->current_fh); 836 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 837 } 838 return status; 839 } 840 841 static __be32 842 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 843 struct nfsd4_rename *rename) 844 { 845 __be32 status = nfserr_nofilehandle; 846 847 if (!cstate->save_fh.fh_dentry) 848 return status; 849 if (opens_in_grace(SVC_NET(rqstp)) && 850 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 851 return nfserr_grace; 852 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 853 rename->rn_snamelen, &cstate->current_fh, 854 rename->rn_tname, rename->rn_tnamelen); 855 if (status) 856 return status; 857 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 858 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 859 return nfs_ok; 860 } 861 862 static __be32 863 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 864 struct nfsd4_secinfo *secinfo) 865 { 866 struct svc_export *exp; 867 struct dentry *dentry; 868 __be32 err; 869 870 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 871 if (err) 872 return err; 873 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 874 secinfo->si_name, secinfo->si_namelen, 875 &exp, &dentry); 876 if (err) 877 return err; 878 fh_unlock(&cstate->current_fh); 879 if (d_really_is_negative(dentry)) { 880 exp_put(exp); 881 err = nfserr_noent; 882 } else 883 secinfo->si_exp = exp; 884 dput(dentry); 885 if (cstate->minorversion) 886 /* See rfc 5661 section 2.6.3.1.1.8 */ 887 fh_put(&cstate->current_fh); 888 return err; 889 } 890 891 static __be32 892 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 893 struct nfsd4_secinfo_no_name *sin) 894 { 895 __be32 err; 896 897 switch (sin->sin_style) { 898 case NFS4_SECINFO_STYLE4_CURRENT_FH: 899 break; 900 case NFS4_SECINFO_STYLE4_PARENT: 901 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 902 if (err) 903 return err; 904 break; 905 default: 906 return nfserr_inval; 907 } 908 909 sin->sin_exp = exp_get(cstate->current_fh.fh_export); 910 fh_put(&cstate->current_fh); 911 return nfs_ok; 912 } 913 914 static __be32 915 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 916 struct nfsd4_setattr *setattr) 917 { 918 __be32 status = nfs_ok; 919 int err; 920 921 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 922 status = nfs4_preprocess_stateid_op(rqstp, cstate, 923 &cstate->current_fh, &setattr->sa_stateid, 924 WR_STATE, NULL, NULL); 925 if (status) { 926 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 927 return status; 928 } 929 } 930 err = fh_want_write(&cstate->current_fh); 931 if (err) 932 return nfserrno(err); 933 status = nfs_ok; 934 935 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 936 nfsd_attrmask); 937 if (status) 938 goto out; 939 940 if (setattr->sa_acl != NULL) 941 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 942 setattr->sa_acl); 943 if (status) 944 goto out; 945 if (setattr->sa_label.len) 946 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 947 &setattr->sa_label); 948 if (status) 949 goto out; 950 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 951 0, (time_t)0); 952 out: 953 fh_drop_write(&cstate->current_fh); 954 return status; 955 } 956 957 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 958 { 959 int i = 1; 960 int buflen = write->wr_buflen; 961 962 vec[0].iov_base = write->wr_head.iov_base; 963 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 964 buflen -= vec[0].iov_len; 965 966 while (buflen) { 967 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 968 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 969 buflen -= vec[i].iov_len; 970 i++; 971 } 972 return i; 973 } 974 975 static __be32 976 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 977 struct nfsd4_write *write) 978 { 979 stateid_t *stateid = &write->wr_stateid; 980 struct file *filp = NULL; 981 __be32 status = nfs_ok; 982 unsigned long cnt; 983 int nvecs; 984 985 if (write->wr_offset >= OFFSET_MAX) 986 return nfserr_inval; 987 988 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 989 stateid, WR_STATE, &filp, NULL); 990 if (status) { 991 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 992 return status; 993 } 994 995 cnt = write->wr_buflen; 996 write->wr_how_written = write->wr_stable_how; 997 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 998 999 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1000 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1001 1002 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp, 1003 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 1004 &write->wr_how_written); 1005 fput(filp); 1006 1007 write->wr_bytes_written = cnt; 1008 1009 return status; 1010 } 1011 1012 static __be32 1013 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1014 stateid_t *src_stateid, struct file **src, 1015 stateid_t *dst_stateid, struct file **dst) 1016 { 1017 __be32 status; 1018 1019 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, 1020 src_stateid, RD_STATE, src, NULL); 1021 if (status) { 1022 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); 1023 goto out; 1024 } 1025 1026 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1027 dst_stateid, WR_STATE, dst, NULL); 1028 if (status) { 1029 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); 1030 goto out_put_src; 1031 } 1032 1033 /* fix up for NFS-specific error code */ 1034 if (!S_ISREG(file_inode(*src)->i_mode) || 1035 !S_ISREG(file_inode(*dst)->i_mode)) { 1036 status = nfserr_wrong_type; 1037 goto out_put_dst; 1038 } 1039 1040 out: 1041 return status; 1042 out_put_dst: 1043 fput(*dst); 1044 out_put_src: 1045 fput(*src); 1046 goto out; 1047 } 1048 1049 static __be32 1050 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1051 struct nfsd4_clone *clone) 1052 { 1053 struct file *src, *dst; 1054 __be32 status; 1055 1056 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src, 1057 &clone->cl_dst_stateid, &dst); 1058 if (status) 1059 goto out; 1060 1061 status = nfsd4_clone_file_range(src, clone->cl_src_pos, 1062 dst, clone->cl_dst_pos, clone->cl_count); 1063 1064 fput(dst); 1065 fput(src); 1066 out: 1067 return status; 1068 } 1069 1070 static __be32 1071 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1072 struct nfsd4_copy *copy) 1073 { 1074 struct file *src, *dst; 1075 __be32 status; 1076 ssize_t bytes; 1077 1078 status = nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, &src, 1079 ©->cp_dst_stateid, &dst); 1080 if (status) 1081 goto out; 1082 1083 bytes = nfsd_copy_file_range(src, copy->cp_src_pos, 1084 dst, copy->cp_dst_pos, copy->cp_count); 1085 1086 if (bytes < 0) 1087 status = nfserrno(bytes); 1088 else { 1089 copy->cp_res.wr_bytes_written = bytes; 1090 copy->cp_res.wr_stable_how = NFS_UNSTABLE; 1091 copy->cp_consecutive = 1; 1092 copy->cp_synchronous = 1; 1093 gen_boot_verifier(©->cp_res.wr_verifier, SVC_NET(rqstp)); 1094 status = nfs_ok; 1095 } 1096 1097 fput(src); 1098 fput(dst); 1099 out: 1100 return status; 1101 } 1102 1103 static __be32 1104 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1105 struct nfsd4_fallocate *fallocate, int flags) 1106 { 1107 __be32 status = nfserr_notsupp; 1108 struct file *file; 1109 1110 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1111 &fallocate->falloc_stateid, 1112 WR_STATE, &file, NULL); 1113 if (status != nfs_ok) { 1114 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1115 return status; 1116 } 1117 1118 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file, 1119 fallocate->falloc_offset, 1120 fallocate->falloc_length, 1121 flags); 1122 fput(file); 1123 return status; 1124 } 1125 1126 static __be32 1127 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1128 struct nfsd4_fallocate *fallocate) 1129 { 1130 return nfsd4_fallocate(rqstp, cstate, fallocate, 0); 1131 } 1132 1133 static __be32 1134 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1135 struct nfsd4_fallocate *fallocate) 1136 { 1137 return nfsd4_fallocate(rqstp, cstate, fallocate, 1138 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1139 } 1140 1141 static __be32 1142 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1143 struct nfsd4_seek *seek) 1144 { 1145 int whence; 1146 __be32 status; 1147 struct file *file; 1148 1149 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1150 &seek->seek_stateid, 1151 RD_STATE, &file, NULL); 1152 if (status) { 1153 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1154 return status; 1155 } 1156 1157 switch (seek->seek_whence) { 1158 case NFS4_CONTENT_DATA: 1159 whence = SEEK_DATA; 1160 break; 1161 case NFS4_CONTENT_HOLE: 1162 whence = SEEK_HOLE; 1163 break; 1164 default: 1165 status = nfserr_union_notsupp; 1166 goto out; 1167 } 1168 1169 /* 1170 * Note: This call does change file->f_pos, but nothing in NFSD 1171 * should ever file->f_pos. 1172 */ 1173 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); 1174 if (seek->seek_pos < 0) 1175 status = nfserrno(seek->seek_pos); 1176 else if (seek->seek_pos >= i_size_read(file_inode(file))) 1177 seek->seek_eof = true; 1178 1179 out: 1180 fput(file); 1181 return status; 1182 } 1183 1184 /* This routine never returns NFS_OK! If there are no other errors, it 1185 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1186 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1187 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1188 */ 1189 static __be32 1190 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1191 struct nfsd4_verify *verify) 1192 { 1193 __be32 *buf, *p; 1194 int count; 1195 __be32 status; 1196 1197 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1198 if (status) 1199 return status; 1200 1201 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1202 if (status) 1203 return status; 1204 1205 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1206 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1207 return nfserr_inval; 1208 if (verify->ve_attrlen & 3) 1209 return nfserr_inval; 1210 1211 /* count in words: 1212 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1213 */ 1214 count = 4 + (verify->ve_attrlen >> 2); 1215 buf = kmalloc(count << 2, GFP_KERNEL); 1216 if (!buf) 1217 return nfserr_jukebox; 1218 1219 p = buf; 1220 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1221 cstate->current_fh.fh_export, 1222 cstate->current_fh.fh_dentry, 1223 verify->ve_bmval, 1224 rqstp, 0); 1225 /* 1226 * If nfsd4_encode_fattr() ran out of space, assume that's because 1227 * the attributes are longer (hence different) than those given: 1228 */ 1229 if (status == nfserr_resource) 1230 status = nfserr_not_same; 1231 if (status) 1232 goto out_kfree; 1233 1234 /* skip bitmap */ 1235 p = buf + 1 + ntohl(buf[0]); 1236 status = nfserr_not_same; 1237 if (ntohl(*p++) != verify->ve_attrlen) 1238 goto out_kfree; 1239 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1240 status = nfserr_same; 1241 1242 out_kfree: 1243 kfree(buf); 1244 return status; 1245 } 1246 1247 static __be32 1248 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1249 struct nfsd4_verify *verify) 1250 { 1251 __be32 status; 1252 1253 status = _nfsd4_verify(rqstp, cstate, verify); 1254 return status == nfserr_not_same ? nfs_ok : status; 1255 } 1256 1257 static __be32 1258 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1259 struct nfsd4_verify *verify) 1260 { 1261 __be32 status; 1262 1263 status = _nfsd4_verify(rqstp, cstate, verify); 1264 return status == nfserr_same ? nfs_ok : status; 1265 } 1266 1267 #ifdef CONFIG_NFSD_PNFS 1268 static const struct nfsd4_layout_ops * 1269 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1270 { 1271 if (!exp->ex_layout_types) { 1272 dprintk("%s: export does not support pNFS\n", __func__); 1273 return NULL; 1274 } 1275 1276 if (!(exp->ex_layout_types & (1 << layout_type))) { 1277 dprintk("%s: layout type %d not supported\n", 1278 __func__, layout_type); 1279 return NULL; 1280 } 1281 1282 return nfsd4_layout_ops[layout_type]; 1283 } 1284 1285 static __be32 1286 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1287 struct nfsd4_compound_state *cstate, 1288 struct nfsd4_getdeviceinfo *gdp) 1289 { 1290 const struct nfsd4_layout_ops *ops; 1291 struct nfsd4_deviceid_map *map; 1292 struct svc_export *exp; 1293 __be32 nfserr; 1294 1295 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1296 __func__, 1297 gdp->gd_layout_type, 1298 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1299 gdp->gd_maxcount); 1300 1301 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1302 if (!map) { 1303 dprintk("%s: couldn't find device ID to export mapping!\n", 1304 __func__); 1305 return nfserr_noent; 1306 } 1307 1308 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1309 if (IS_ERR(exp)) { 1310 dprintk("%s: could not find device id\n", __func__); 1311 return nfserr_noent; 1312 } 1313 1314 nfserr = nfserr_layoutunavailable; 1315 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1316 if (!ops) 1317 goto out; 1318 1319 nfserr = nfs_ok; 1320 if (gdp->gd_maxcount != 0) { 1321 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1322 rqstp, cstate->session->se_client, gdp); 1323 } 1324 1325 gdp->gd_notify_types &= ops->notify_types; 1326 out: 1327 exp_put(exp); 1328 return nfserr; 1329 } 1330 1331 static __be32 1332 nfsd4_layoutget(struct svc_rqst *rqstp, 1333 struct nfsd4_compound_state *cstate, 1334 struct nfsd4_layoutget *lgp) 1335 { 1336 struct svc_fh *current_fh = &cstate->current_fh; 1337 const struct nfsd4_layout_ops *ops; 1338 struct nfs4_layout_stateid *ls; 1339 __be32 nfserr; 1340 int accmode; 1341 1342 switch (lgp->lg_seg.iomode) { 1343 case IOMODE_READ: 1344 accmode = NFSD_MAY_READ; 1345 break; 1346 case IOMODE_RW: 1347 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE; 1348 break; 1349 default: 1350 dprintk("%s: invalid iomode %d\n", 1351 __func__, lgp->lg_seg.iomode); 1352 nfserr = nfserr_badiomode; 1353 goto out; 1354 } 1355 1356 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1357 if (nfserr) 1358 goto out; 1359 1360 nfserr = nfserr_layoutunavailable; 1361 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1362 if (!ops) 1363 goto out; 1364 1365 /* 1366 * Verify minlength and range as per RFC5661: 1367 * o If loga_length is less than loga_minlength, 1368 * the metadata server MUST return NFS4ERR_INVAL. 1369 * o If the sum of loga_offset and loga_minlength exceeds 1370 * NFS4_UINT64_MAX, and loga_minlength is not 1371 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1372 * o If the sum of loga_offset and loga_length exceeds 1373 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1374 * the error NFS4ERR_INVAL MUST result. 1375 */ 1376 nfserr = nfserr_inval; 1377 if (lgp->lg_seg.length < lgp->lg_minlength || 1378 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1379 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1380 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1381 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1382 goto out; 1383 if (lgp->lg_seg.length == 0) 1384 goto out; 1385 1386 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1387 true, lgp->lg_layout_type, &ls); 1388 if (nfserr) { 1389 trace_layout_get_lookup_fail(&lgp->lg_sid); 1390 goto out; 1391 } 1392 1393 nfserr = nfserr_recallconflict; 1394 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1395 goto out_put_stid; 1396 1397 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1398 current_fh, lgp); 1399 if (nfserr) 1400 goto out_put_stid; 1401 1402 nfserr = nfsd4_insert_layout(lgp, ls); 1403 1404 out_put_stid: 1405 mutex_unlock(&ls->ls_mutex); 1406 nfs4_put_stid(&ls->ls_stid); 1407 out: 1408 return nfserr; 1409 } 1410 1411 static __be32 1412 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1413 struct nfsd4_compound_state *cstate, 1414 struct nfsd4_layoutcommit *lcp) 1415 { 1416 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1417 struct svc_fh *current_fh = &cstate->current_fh; 1418 const struct nfsd4_layout_ops *ops; 1419 loff_t new_size = lcp->lc_last_wr + 1; 1420 struct inode *inode; 1421 struct nfs4_layout_stateid *ls; 1422 __be32 nfserr; 1423 1424 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 1425 if (nfserr) 1426 goto out; 1427 1428 nfserr = nfserr_layoutunavailable; 1429 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 1430 if (!ops) 1431 goto out; 1432 inode = d_inode(current_fh->fh_dentry); 1433 1434 nfserr = nfserr_inval; 1435 if (new_size <= seg->offset) { 1436 dprintk("pnfsd: last write before layout segment\n"); 1437 goto out; 1438 } 1439 if (new_size > seg->offset + seg->length) { 1440 dprintk("pnfsd: last write beyond layout segment\n"); 1441 goto out; 1442 } 1443 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 1444 dprintk("pnfsd: layoutcommit beyond EOF\n"); 1445 goto out; 1446 } 1447 1448 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 1449 false, lcp->lc_layout_type, 1450 &ls); 1451 if (nfserr) { 1452 trace_layout_commit_lookup_fail(&lcp->lc_sid); 1453 /* fixup error code as per RFC5661 */ 1454 if (nfserr == nfserr_bad_stateid) 1455 nfserr = nfserr_badlayout; 1456 goto out; 1457 } 1458 1459 /* LAYOUTCOMMIT does not require any serialization */ 1460 mutex_unlock(&ls->ls_mutex); 1461 1462 if (new_size > i_size_read(inode)) { 1463 lcp->lc_size_chg = 1; 1464 lcp->lc_newsize = new_size; 1465 } else { 1466 lcp->lc_size_chg = 0; 1467 } 1468 1469 nfserr = ops->proc_layoutcommit(inode, lcp); 1470 nfs4_put_stid(&ls->ls_stid); 1471 out: 1472 return nfserr; 1473 } 1474 1475 static __be32 1476 nfsd4_layoutreturn(struct svc_rqst *rqstp, 1477 struct nfsd4_compound_state *cstate, 1478 struct nfsd4_layoutreturn *lrp) 1479 { 1480 struct svc_fh *current_fh = &cstate->current_fh; 1481 __be32 nfserr; 1482 1483 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 1484 if (nfserr) 1485 goto out; 1486 1487 nfserr = nfserr_layoutunavailable; 1488 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 1489 goto out; 1490 1491 switch (lrp->lr_seg.iomode) { 1492 case IOMODE_READ: 1493 case IOMODE_RW: 1494 case IOMODE_ANY: 1495 break; 1496 default: 1497 dprintk("%s: invalid iomode %d\n", __func__, 1498 lrp->lr_seg.iomode); 1499 nfserr = nfserr_inval; 1500 goto out; 1501 } 1502 1503 switch (lrp->lr_return_type) { 1504 case RETURN_FILE: 1505 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 1506 break; 1507 case RETURN_FSID: 1508 case RETURN_ALL: 1509 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 1510 break; 1511 default: 1512 dprintk("%s: invalid return_type %d\n", __func__, 1513 lrp->lr_return_type); 1514 nfserr = nfserr_inval; 1515 break; 1516 } 1517 out: 1518 return nfserr; 1519 } 1520 #endif /* CONFIG_NFSD_PNFS */ 1521 1522 /* 1523 * NULL call. 1524 */ 1525 static __be32 1526 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1527 { 1528 return nfs_ok; 1529 } 1530 1531 static inline void nfsd4_increment_op_stats(u32 opnum) 1532 { 1533 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1534 nfsdstats.nfs4_opcount[opnum]++; 1535 } 1536 1537 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1538 void *); 1539 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1540 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1541 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1542 1543 enum nfsd4_op_flags { 1544 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1545 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1546 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1547 /* For rfc 5661 section 2.6.3.1.1: */ 1548 OP_HANDLES_WRONGSEC = 1 << 3, 1549 OP_IS_PUTFH_LIKE = 1 << 4, 1550 /* 1551 * These are the ops whose result size we estimate before 1552 * encoding, to avoid performing an op then not being able to 1553 * respond or cache a response. This includes writes and setattrs 1554 * as well as the operations usually called "nonidempotent": 1555 */ 1556 OP_MODIFIES_SOMETHING = 1 << 5, 1557 /* 1558 * Cache compounds containing these ops in the xid-based drc: 1559 * We use the DRC for compounds containing non-idempotent 1560 * operations, *except* those that are 4.1-specific (since 1561 * sessions provide their own EOS), and except for stateful 1562 * operations other than setclientid and setclientid_confirm 1563 * (since sequence numbers provide EOS for open, lock, etc in 1564 * the v4.0 case). 1565 */ 1566 OP_CACHEME = 1 << 6, 1567 /* 1568 * These are ops which clear current state id. 1569 */ 1570 OP_CLEAR_STATEID = 1 << 7, 1571 }; 1572 1573 struct nfsd4_operation { 1574 nfsd4op_func op_func; 1575 u32 op_flags; 1576 char *op_name; 1577 /* Try to get response size before operation */ 1578 nfsd4op_rsize op_rsize_bop; 1579 stateid_getter op_get_currentstateid; 1580 stateid_setter op_set_currentstateid; 1581 }; 1582 1583 static struct nfsd4_operation nfsd4_ops[]; 1584 1585 static const char *nfsd4_op_name(unsigned opnum); 1586 1587 /* 1588 * Enforce NFSv4.1 COMPOUND ordering rules: 1589 * 1590 * Also note, enforced elsewhere: 1591 * - SEQUENCE other than as first op results in 1592 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1593 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1594 * (Enforced in nfsd4_bind_conn_to_session().) 1595 * - DESTROY_SESSION must be the final operation in a compound, if 1596 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1597 * (Enforced in nfsd4_destroy_session().) 1598 */ 1599 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1600 { 1601 struct nfsd4_op *op = &args->ops[0]; 1602 1603 /* These ordering requirements don't apply to NFSv4.0: */ 1604 if (args->minorversion == 0) 1605 return nfs_ok; 1606 /* This is weird, but OK, not our problem: */ 1607 if (args->opcnt == 0) 1608 return nfs_ok; 1609 if (op->status == nfserr_op_illegal) 1610 return nfs_ok; 1611 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1612 return nfserr_op_not_in_session; 1613 if (op->opnum == OP_SEQUENCE) 1614 return nfs_ok; 1615 if (args->opcnt != 1) 1616 return nfserr_not_only_op; 1617 return nfs_ok; 1618 } 1619 1620 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1621 { 1622 return &nfsd4_ops[op->opnum]; 1623 } 1624 1625 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1626 { 1627 if (op->opnum == OP_ILLEGAL) 1628 return false; 1629 return OPDESC(op)->op_flags & OP_CACHEME; 1630 } 1631 1632 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1633 { 1634 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1635 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1636 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1637 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1638 struct nfsd4_operation *thisd; 1639 struct nfsd4_operation *nextd; 1640 1641 thisd = OPDESC(this); 1642 /* 1643 * Most ops check wronsec on our own; only the putfh-like ops 1644 * have special rules. 1645 */ 1646 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1647 return false; 1648 /* 1649 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1650 * put-filehandle operation if we're not going to use the 1651 * result: 1652 */ 1653 if (argp->opcnt == resp->opcnt) 1654 return false; 1655 if (next->opnum == OP_ILLEGAL) 1656 return false; 1657 nextd = OPDESC(next); 1658 /* 1659 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1660 * errors themselves as necessary; others should check for them 1661 * now: 1662 */ 1663 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1664 } 1665 1666 static void svcxdr_init_encode(struct svc_rqst *rqstp, 1667 struct nfsd4_compoundres *resp) 1668 { 1669 struct xdr_stream *xdr = &resp->xdr; 1670 struct xdr_buf *buf = &rqstp->rq_res; 1671 struct kvec *head = buf->head; 1672 1673 xdr->buf = buf; 1674 xdr->iov = head; 1675 xdr->p = head->iov_base + head->iov_len; 1676 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1677 /* Tail and page_len should be zero at this point: */ 1678 buf->len = buf->head[0].iov_len; 1679 xdr->scratch.iov_len = 0; 1680 xdr->page_ptr = buf->pages - 1; 1681 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1682 - rqstp->rq_auth_slack; 1683 } 1684 1685 /* 1686 * COMPOUND call. 1687 */ 1688 static __be32 1689 nfsd4_proc_compound(struct svc_rqst *rqstp, 1690 struct nfsd4_compoundargs *args, 1691 struct nfsd4_compoundres *resp) 1692 { 1693 struct nfsd4_op *op; 1694 struct nfsd4_operation *opdesc; 1695 struct nfsd4_compound_state *cstate = &resp->cstate; 1696 struct svc_fh *current_fh = &cstate->current_fh; 1697 struct svc_fh *save_fh = &cstate->save_fh; 1698 __be32 status; 1699 1700 svcxdr_init_encode(rqstp, resp); 1701 resp->tagp = resp->xdr.p; 1702 /* reserve space for: taglen, tag, and opcnt */ 1703 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1704 resp->taglen = args->taglen; 1705 resp->tag = args->tag; 1706 resp->rqstp = rqstp; 1707 cstate->minorversion = args->minorversion; 1708 fh_init(current_fh, NFS4_FHSIZE); 1709 fh_init(save_fh, NFS4_FHSIZE); 1710 /* 1711 * Don't use the deferral mechanism for NFSv4; compounds make it 1712 * too hard to avoid non-idempotency problems. 1713 */ 1714 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1715 1716 /* 1717 * According to RFC3010, this takes precedence over all other errors. 1718 */ 1719 status = nfserr_minor_vers_mismatch; 1720 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1721 goto out; 1722 1723 status = nfs41_check_op_ordering(args); 1724 if (status) { 1725 op = &args->ops[0]; 1726 op->status = status; 1727 goto encode_op; 1728 } 1729 1730 while (!status && resp->opcnt < args->opcnt) { 1731 op = &args->ops[resp->opcnt++]; 1732 1733 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1734 resp->opcnt, args->opcnt, op->opnum, 1735 nfsd4_op_name(op->opnum)); 1736 /* 1737 * The XDR decode routines may have pre-set op->status; 1738 * for example, if there is a miscellaneous XDR error 1739 * it will be set to nfserr_bad_xdr. 1740 */ 1741 if (op->status) { 1742 if (op->opnum == OP_OPEN) 1743 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1744 goto encode_op; 1745 } 1746 1747 opdesc = OPDESC(op); 1748 1749 if (!current_fh->fh_dentry) { 1750 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1751 op->status = nfserr_nofilehandle; 1752 goto encode_op; 1753 } 1754 } else if (current_fh->fh_export->ex_fslocs.migrated && 1755 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1756 op->status = nfserr_moved; 1757 goto encode_op; 1758 } 1759 1760 fh_clear_wcc(current_fh); 1761 1762 /* If op is non-idempotent */ 1763 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1764 /* 1765 * Don't execute this op if we couldn't encode a 1766 * succesful reply: 1767 */ 1768 u32 plen = opdesc->op_rsize_bop(rqstp, op); 1769 /* 1770 * Plus if there's another operation, make sure 1771 * we'll have space to at least encode an error: 1772 */ 1773 if (resp->opcnt < args->opcnt) 1774 plen += COMPOUND_ERR_SLACK_SPACE; 1775 op->status = nfsd4_check_resp_size(resp, plen); 1776 } 1777 1778 if (op->status) 1779 goto encode_op; 1780 1781 if (opdesc->op_get_currentstateid) 1782 opdesc->op_get_currentstateid(cstate, &op->u); 1783 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1784 1785 if (!op->status) { 1786 if (opdesc->op_set_currentstateid) 1787 opdesc->op_set_currentstateid(cstate, &op->u); 1788 1789 if (opdesc->op_flags & OP_CLEAR_STATEID) 1790 clear_current_stateid(cstate); 1791 1792 if (need_wrongsec_check(rqstp)) 1793 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 1794 } 1795 1796 encode_op: 1797 /* Only from SEQUENCE */ 1798 if (cstate->status == nfserr_replay_cache) { 1799 dprintk("%s NFS4.1 replay from cache\n", __func__); 1800 status = op->status; 1801 goto out; 1802 } 1803 if (op->status == nfserr_replay_me) { 1804 op->replay = &cstate->replay_owner->so_replay; 1805 nfsd4_encode_replay(&resp->xdr, op); 1806 status = op->status = op->replay->rp_status; 1807 } else { 1808 nfsd4_encode_operation(resp, op); 1809 status = op->status; 1810 } 1811 1812 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1813 args->ops, args->opcnt, resp->opcnt, op->opnum, 1814 be32_to_cpu(status)); 1815 1816 nfsd4_cstate_clear_replay(cstate); 1817 nfsd4_increment_op_stats(op->opnum); 1818 } 1819 1820 cstate->status = status; 1821 fh_put(current_fh); 1822 fh_put(save_fh); 1823 BUG_ON(cstate->replay_owner); 1824 out: 1825 /* Reset deferral mechanism for RPC deferrals */ 1826 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1827 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1828 return status; 1829 } 1830 1831 #define op_encode_hdr_size (2) 1832 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1833 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1834 #define op_encode_change_info_maxsz (5) 1835 #define nfs4_fattr_bitmap_maxsz (4) 1836 1837 /* We'll fall back on returning no lockowner if run out of space: */ 1838 #define op_encode_lockowner_maxsz (0) 1839 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1840 1841 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1842 1843 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1844 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1845 op_encode_ace_maxsz) 1846 1847 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1848 1849 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1850 { 1851 return (op_encode_hdr_size) * sizeof(__be32); 1852 } 1853 1854 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1855 { 1856 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1857 } 1858 1859 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1860 { 1861 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1862 } 1863 1864 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1865 { 1866 return (op_encode_hdr_size + op_encode_change_info_maxsz 1867 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1868 } 1869 1870 /* 1871 * Note since this is an idempotent operation we won't insist on failing 1872 * the op prematurely if the estimate is too large. We may turn off splice 1873 * reads unnecessarily. 1874 */ 1875 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1876 struct nfsd4_op *op) 1877 { 1878 u32 *bmap = op->u.getattr.ga_bmval; 1879 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1880 u32 ret = 0; 1881 1882 if (bmap0 & FATTR4_WORD0_ACL) 1883 return svc_max_payload(rqstp); 1884 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1885 return svc_max_payload(rqstp); 1886 1887 if (bmap1 & FATTR4_WORD1_OWNER) { 1888 ret += IDMAP_NAMESZ + 4; 1889 bmap1 &= ~FATTR4_WORD1_OWNER; 1890 } 1891 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1892 ret += IDMAP_NAMESZ + 4; 1893 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1894 } 1895 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1896 ret += NFS4_FHSIZE + 4; 1897 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1898 } 1899 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1900 ret += NFS4_MAXLABELLEN + 12; 1901 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1902 } 1903 /* 1904 * Largest of remaining attributes are 16 bytes (e.g., 1905 * supported_attributes) 1906 */ 1907 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1908 /* bitmask, length */ 1909 ret += 20; 1910 return ret; 1911 } 1912 1913 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1914 { 1915 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1916 * sizeof(__be32); 1917 } 1918 1919 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1920 { 1921 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1922 * sizeof(__be32); 1923 } 1924 1925 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1926 { 1927 return (op_encode_hdr_size + op_encode_stateid_maxsz 1928 + op_encode_change_info_maxsz + 1 1929 + nfs4_fattr_bitmap_maxsz 1930 + op_encode_delegation_maxsz) * sizeof(__be32); 1931 } 1932 1933 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1934 { 1935 u32 maxcount = 0, rlen = 0; 1936 1937 maxcount = svc_max_payload(rqstp); 1938 rlen = min(op->u.read.rd_length, maxcount); 1939 1940 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1941 } 1942 1943 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1944 { 1945 u32 maxcount = 0, rlen = 0; 1946 1947 maxcount = svc_max_payload(rqstp); 1948 rlen = min(op->u.readdir.rd_maxcount, maxcount); 1949 1950 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1951 XDR_QUADLEN(rlen)) * sizeof(__be32); 1952 } 1953 1954 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1955 { 1956 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1957 * sizeof(__be32); 1958 } 1959 1960 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1961 { 1962 return (op_encode_hdr_size + op_encode_change_info_maxsz 1963 + op_encode_change_info_maxsz) * sizeof(__be32); 1964 } 1965 1966 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1967 struct nfsd4_op *op) 1968 { 1969 return (op_encode_hdr_size 1970 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 1971 } 1972 1973 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1974 { 1975 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1976 } 1977 1978 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1979 { 1980 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1981 sizeof(__be32); 1982 } 1983 1984 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1985 { 1986 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 1987 } 1988 1989 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1990 { 1991 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1992 1 + 1 + /* eir_flags, spr_how */\ 1993 4 + /* spo_must_enforce & _allow with bitmap */\ 1994 2 + /*eir_server_owner.so_minor_id */\ 1995 /* eir_server_owner.so_major_id<> */\ 1996 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1997 /* eir_server_scope<> */\ 1998 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1999 1 + /* eir_server_impl_id array length */\ 2000 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 2001 } 2002 2003 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2004 { 2005 return (op_encode_hdr_size + \ 2006 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 2007 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 2008 } 2009 2010 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2011 { 2012 return (op_encode_hdr_size + \ 2013 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 2014 2 + /* csr_sequence, csr_flags */\ 2015 op_encode_channel_attrs_maxsz + \ 2016 op_encode_channel_attrs_maxsz) * sizeof(__be32); 2017 } 2018 2019 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2020 { 2021 return (op_encode_hdr_size + 2022 1 /* wr_callback */ + 2023 op_encode_stateid_maxsz /* wr_callback */ + 2024 2 /* wr_count */ + 2025 1 /* wr_committed */ + 2026 op_encode_verifier_maxsz + 2027 1 /* cr_consecutive */ + 2028 1 /* cr_synchronous */) * sizeof(__be32); 2029 } 2030 2031 #ifdef CONFIG_NFSD_PNFS 2032 /* 2033 * At this stage we don't really know what layout driver will handle the request, 2034 * so we need to define an arbitrary upper bound here. 2035 */ 2036 #define MAX_LAYOUT_SIZE 128 2037 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2038 { 2039 return (op_encode_hdr_size + 2040 1 /* logr_return_on_close */ + 2041 op_encode_stateid_maxsz + 2042 1 /* nr of layouts */ + 2043 MAX_LAYOUT_SIZE) * sizeof(__be32); 2044 } 2045 2046 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2047 { 2048 return (op_encode_hdr_size + 2049 1 /* locr_newsize */ + 2050 2 /* ns_size */) * sizeof(__be32); 2051 } 2052 2053 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2054 { 2055 return (op_encode_hdr_size + 2056 1 /* lrs_stateid */ + 2057 op_encode_stateid_maxsz) * sizeof(__be32); 2058 } 2059 #endif /* CONFIG_NFSD_PNFS */ 2060 2061 static struct nfsd4_operation nfsd4_ops[] = { 2062 [OP_ACCESS] = { 2063 .op_func = (nfsd4op_func)nfsd4_access, 2064 .op_name = "OP_ACCESS", 2065 }, 2066 [OP_CLOSE] = { 2067 .op_func = (nfsd4op_func)nfsd4_close, 2068 .op_flags = OP_MODIFIES_SOMETHING, 2069 .op_name = "OP_CLOSE", 2070 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2071 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 2072 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 2073 }, 2074 [OP_COMMIT] = { 2075 .op_func = (nfsd4op_func)nfsd4_commit, 2076 .op_flags = OP_MODIFIES_SOMETHING, 2077 .op_name = "OP_COMMIT", 2078 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 2079 }, 2080 [OP_CREATE] = { 2081 .op_func = (nfsd4op_func)nfsd4_create, 2082 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2083 .op_name = "OP_CREATE", 2084 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 2085 }, 2086 [OP_DELEGRETURN] = { 2087 .op_func = (nfsd4op_func)nfsd4_delegreturn, 2088 .op_flags = OP_MODIFIES_SOMETHING, 2089 .op_name = "OP_DELEGRETURN", 2090 .op_rsize_bop = nfsd4_only_status_rsize, 2091 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 2092 }, 2093 [OP_GETATTR] = { 2094 .op_func = (nfsd4op_func)nfsd4_getattr, 2095 .op_flags = ALLOWED_ON_ABSENT_FS, 2096 .op_rsize_bop = nfsd4_getattr_rsize, 2097 .op_name = "OP_GETATTR", 2098 }, 2099 [OP_GETFH] = { 2100 .op_func = (nfsd4op_func)nfsd4_getfh, 2101 .op_name = "OP_GETFH", 2102 }, 2103 [OP_LINK] = { 2104 .op_func = (nfsd4op_func)nfsd4_link, 2105 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2106 | OP_CACHEME, 2107 .op_name = "OP_LINK", 2108 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 2109 }, 2110 [OP_LOCK] = { 2111 .op_func = (nfsd4op_func)nfsd4_lock, 2112 .op_flags = OP_MODIFIES_SOMETHING, 2113 .op_name = "OP_LOCK", 2114 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 2115 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 2116 }, 2117 [OP_LOCKT] = { 2118 .op_func = (nfsd4op_func)nfsd4_lockt, 2119 .op_name = "OP_LOCKT", 2120 }, 2121 [OP_LOCKU] = { 2122 .op_func = (nfsd4op_func)nfsd4_locku, 2123 .op_flags = OP_MODIFIES_SOMETHING, 2124 .op_name = "OP_LOCKU", 2125 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2126 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 2127 }, 2128 [OP_LOOKUP] = { 2129 .op_func = (nfsd4op_func)nfsd4_lookup, 2130 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2131 .op_name = "OP_LOOKUP", 2132 }, 2133 [OP_LOOKUPP] = { 2134 .op_func = (nfsd4op_func)nfsd4_lookupp, 2135 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2136 .op_name = "OP_LOOKUPP", 2137 }, 2138 [OP_NVERIFY] = { 2139 .op_func = (nfsd4op_func)nfsd4_nverify, 2140 .op_name = "OP_NVERIFY", 2141 }, 2142 [OP_OPEN] = { 2143 .op_func = (nfsd4op_func)nfsd4_open, 2144 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2145 .op_name = "OP_OPEN", 2146 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 2147 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 2148 }, 2149 [OP_OPEN_CONFIRM] = { 2150 .op_func = (nfsd4op_func)nfsd4_open_confirm, 2151 .op_flags = OP_MODIFIES_SOMETHING, 2152 .op_name = "OP_OPEN_CONFIRM", 2153 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2154 }, 2155 [OP_OPEN_DOWNGRADE] = { 2156 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 2157 .op_flags = OP_MODIFIES_SOMETHING, 2158 .op_name = "OP_OPEN_DOWNGRADE", 2159 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2160 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 2161 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 2162 }, 2163 [OP_PUTFH] = { 2164 .op_func = (nfsd4op_func)nfsd4_putfh, 2165 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2166 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2167 .op_name = "OP_PUTFH", 2168 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2169 }, 2170 [OP_PUTPUBFH] = { 2171 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2172 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2173 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2174 .op_name = "OP_PUTPUBFH", 2175 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2176 }, 2177 [OP_PUTROOTFH] = { 2178 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2179 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2180 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2181 .op_name = "OP_PUTROOTFH", 2182 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2183 }, 2184 [OP_READ] = { 2185 .op_func = (nfsd4op_func)nfsd4_read, 2186 .op_name = "OP_READ", 2187 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 2188 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 2189 }, 2190 [OP_READDIR] = { 2191 .op_func = (nfsd4op_func)nfsd4_readdir, 2192 .op_name = "OP_READDIR", 2193 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 2194 }, 2195 [OP_READLINK] = { 2196 .op_func = (nfsd4op_func)nfsd4_readlink, 2197 .op_name = "OP_READLINK", 2198 }, 2199 [OP_REMOVE] = { 2200 .op_func = (nfsd4op_func)nfsd4_remove, 2201 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2202 .op_name = "OP_REMOVE", 2203 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 2204 }, 2205 [OP_RENAME] = { 2206 .op_func = (nfsd4op_func)nfsd4_rename, 2207 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2208 .op_name = "OP_RENAME", 2209 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 2210 }, 2211 [OP_RENEW] = { 2212 .op_func = (nfsd4op_func)nfsd4_renew, 2213 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2214 | OP_MODIFIES_SOMETHING, 2215 .op_name = "OP_RENEW", 2216 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2217 2218 }, 2219 [OP_RESTOREFH] = { 2220 .op_func = (nfsd4op_func)nfsd4_restorefh, 2221 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2222 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2223 .op_name = "OP_RESTOREFH", 2224 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2225 }, 2226 [OP_SAVEFH] = { 2227 .op_func = (nfsd4op_func)nfsd4_savefh, 2228 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2229 .op_name = "OP_SAVEFH", 2230 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2231 }, 2232 [OP_SECINFO] = { 2233 .op_func = (nfsd4op_func)nfsd4_secinfo, 2234 .op_flags = OP_HANDLES_WRONGSEC, 2235 .op_name = "OP_SECINFO", 2236 }, 2237 [OP_SETATTR] = { 2238 .op_func = (nfsd4op_func)nfsd4_setattr, 2239 .op_name = "OP_SETATTR", 2240 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2241 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 2242 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 2243 }, 2244 [OP_SETCLIENTID] = { 2245 .op_func = (nfsd4op_func)nfsd4_setclientid, 2246 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2247 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2248 .op_name = "OP_SETCLIENTID", 2249 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 2250 }, 2251 [OP_SETCLIENTID_CONFIRM] = { 2252 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 2253 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2254 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2255 .op_name = "OP_SETCLIENTID_CONFIRM", 2256 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2257 }, 2258 [OP_VERIFY] = { 2259 .op_func = (nfsd4op_func)nfsd4_verify, 2260 .op_name = "OP_VERIFY", 2261 }, 2262 [OP_WRITE] = { 2263 .op_func = (nfsd4op_func)nfsd4_write, 2264 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2265 .op_name = "OP_WRITE", 2266 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 2267 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 2268 }, 2269 [OP_RELEASE_LOCKOWNER] = { 2270 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 2271 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2272 | OP_MODIFIES_SOMETHING, 2273 .op_name = "OP_RELEASE_LOCKOWNER", 2274 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2275 }, 2276 2277 /* NFSv4.1 operations */ 2278 [OP_EXCHANGE_ID] = { 2279 .op_func = (nfsd4op_func)nfsd4_exchange_id, 2280 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2281 | OP_MODIFIES_SOMETHING, 2282 .op_name = "OP_EXCHANGE_ID", 2283 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 2284 }, 2285 [OP_BACKCHANNEL_CTL] = { 2286 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 2287 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2288 .op_name = "OP_BACKCHANNEL_CTL", 2289 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2290 }, 2291 [OP_BIND_CONN_TO_SESSION] = { 2292 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 2293 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2294 | OP_MODIFIES_SOMETHING, 2295 .op_name = "OP_BIND_CONN_TO_SESSION", 2296 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 2297 }, 2298 [OP_CREATE_SESSION] = { 2299 .op_func = (nfsd4op_func)nfsd4_create_session, 2300 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2301 | OP_MODIFIES_SOMETHING, 2302 .op_name = "OP_CREATE_SESSION", 2303 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 2304 }, 2305 [OP_DESTROY_SESSION] = { 2306 .op_func = (nfsd4op_func)nfsd4_destroy_session, 2307 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2308 | OP_MODIFIES_SOMETHING, 2309 .op_name = "OP_DESTROY_SESSION", 2310 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2311 }, 2312 [OP_SEQUENCE] = { 2313 .op_func = (nfsd4op_func)nfsd4_sequence, 2314 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 2315 .op_name = "OP_SEQUENCE", 2316 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize, 2317 }, 2318 [OP_DESTROY_CLIENTID] = { 2319 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 2320 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2321 | OP_MODIFIES_SOMETHING, 2322 .op_name = "OP_DESTROY_CLIENTID", 2323 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2324 }, 2325 [OP_RECLAIM_COMPLETE] = { 2326 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 2327 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2328 .op_name = "OP_RECLAIM_COMPLETE", 2329 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2330 }, 2331 [OP_SECINFO_NO_NAME] = { 2332 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 2333 .op_flags = OP_HANDLES_WRONGSEC, 2334 .op_name = "OP_SECINFO_NO_NAME", 2335 }, 2336 [OP_TEST_STATEID] = { 2337 .op_func = (nfsd4op_func)nfsd4_test_stateid, 2338 .op_flags = ALLOWED_WITHOUT_FH, 2339 .op_name = "OP_TEST_STATEID", 2340 }, 2341 [OP_FREE_STATEID] = { 2342 .op_func = (nfsd4op_func)nfsd4_free_stateid, 2343 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2344 .op_name = "OP_FREE_STATEID", 2345 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 2346 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2347 }, 2348 #ifdef CONFIG_NFSD_PNFS 2349 [OP_GETDEVICEINFO] = { 2350 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo, 2351 .op_flags = ALLOWED_WITHOUT_FH, 2352 .op_name = "OP_GETDEVICEINFO", 2353 }, 2354 [OP_LAYOUTGET] = { 2355 .op_func = (nfsd4op_func)nfsd4_layoutget, 2356 .op_flags = OP_MODIFIES_SOMETHING, 2357 .op_name = "OP_LAYOUTGET", 2358 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize, 2359 }, 2360 [OP_LAYOUTCOMMIT] = { 2361 .op_func = (nfsd4op_func)nfsd4_layoutcommit, 2362 .op_flags = OP_MODIFIES_SOMETHING, 2363 .op_name = "OP_LAYOUTCOMMIT", 2364 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize, 2365 }, 2366 [OP_LAYOUTRETURN] = { 2367 .op_func = (nfsd4op_func)nfsd4_layoutreturn, 2368 .op_flags = OP_MODIFIES_SOMETHING, 2369 .op_name = "OP_LAYOUTRETURN", 2370 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize, 2371 }, 2372 #endif /* CONFIG_NFSD_PNFS */ 2373 2374 /* NFSv4.2 operations */ 2375 [OP_ALLOCATE] = { 2376 .op_func = (nfsd4op_func)nfsd4_allocate, 2377 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2378 .op_name = "OP_ALLOCATE", 2379 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2380 }, 2381 [OP_DEALLOCATE] = { 2382 .op_func = (nfsd4op_func)nfsd4_deallocate, 2383 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2384 .op_name = "OP_DEALLOCATE", 2385 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2386 }, 2387 [OP_CLONE] = { 2388 .op_func = (nfsd4op_func)nfsd4_clone, 2389 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2390 .op_name = "OP_CLONE", 2391 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2392 }, 2393 [OP_COPY] = { 2394 .op_func = (nfsd4op_func)nfsd4_copy, 2395 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2396 .op_name = "OP_COPY", 2397 .op_rsize_bop = (nfsd4op_rsize)nfsd4_copy_rsize, 2398 }, 2399 [OP_SEEK] = { 2400 .op_func = (nfsd4op_func)nfsd4_seek, 2401 .op_name = "OP_SEEK", 2402 }, 2403 }; 2404 2405 /** 2406 * nfsd4_spo_must_allow - Determine if the compound op contains an 2407 * operation that is allowed to be sent with machine credentials 2408 * 2409 * @rqstp: a pointer to the struct svc_rqst 2410 * 2411 * Checks to see if the compound contains a spo_must_allow op 2412 * and confirms that it was sent with the proper machine creds. 2413 */ 2414 2415 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 2416 { 2417 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2418 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2419 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2420 struct nfsd4_compound_state *cstate = &resp->cstate; 2421 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 2422 u32 opiter; 2423 2424 if (!cstate->minorversion) 2425 return false; 2426 2427 if (cstate->spo_must_allowed == true) 2428 return true; 2429 2430 opiter = resp->opcnt; 2431 while (opiter < argp->opcnt) { 2432 this = &argp->ops[opiter++]; 2433 if (test_bit(this->opnum, allow->u.longs) && 2434 cstate->clp->cl_mach_cred && 2435 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 2436 cstate->spo_must_allowed = true; 2437 return true; 2438 } 2439 } 2440 cstate->spo_must_allowed = false; 2441 return false; 2442 } 2443 2444 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 2445 { 2446 struct nfsd4_operation *opdesc; 2447 nfsd4op_rsize estimator; 2448 2449 if (op->opnum == OP_ILLEGAL) 2450 return op_encode_hdr_size * sizeof(__be32); 2451 opdesc = OPDESC(op); 2452 estimator = opdesc->op_rsize_bop; 2453 return estimator ? estimator(rqstp, op) : PAGE_SIZE; 2454 } 2455 2456 void warn_on_nonidempotent_op(struct nfsd4_op *op) 2457 { 2458 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 2459 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 2460 op->opnum, nfsd4_op_name(op->opnum)); 2461 WARN_ON_ONCE(1); 2462 } 2463 } 2464 2465 static const char *nfsd4_op_name(unsigned opnum) 2466 { 2467 if (opnum < ARRAY_SIZE(nfsd4_ops)) 2468 return nfsd4_ops[opnum].op_name; 2469 return "unknown_operation"; 2470 } 2471 2472 #define nfsd4_voidres nfsd4_voidargs 2473 struct nfsd4_voidargs { int dummy; }; 2474 2475 static struct svc_procedure nfsd_procedures4[2] = { 2476 [NFSPROC4_NULL] = { 2477 .pc_func = (svc_procfunc) nfsd4_proc_null, 2478 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 2479 .pc_argsize = sizeof(struct nfsd4_voidargs), 2480 .pc_ressize = sizeof(struct nfsd4_voidres), 2481 .pc_cachetype = RC_NOCACHE, 2482 .pc_xdrressize = 1, 2483 }, 2484 [NFSPROC4_COMPOUND] = { 2485 .pc_func = (svc_procfunc) nfsd4_proc_compound, 2486 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 2487 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 2488 .pc_argsize = sizeof(struct nfsd4_compoundargs), 2489 .pc_ressize = sizeof(struct nfsd4_compoundres), 2490 .pc_release = nfsd4_release_compoundargs, 2491 .pc_cachetype = RC_NOCACHE, 2492 .pc_xdrressize = NFSD_BUFSIZE/4, 2493 }, 2494 }; 2495 2496 struct svc_version nfsd_version4 = { 2497 .vs_vers = 4, 2498 .vs_nproc = 2, 2499 .vs_proc = nfsd_procedures4, 2500 .vs_dispatch = nfsd_dispatch, 2501 .vs_xdrsize = NFS4_SVC_XDRSIZE, 2502 .vs_rpcb_optnl = 1, 2503 }; 2504 2505 /* 2506 * Local variables: 2507 * c-basic-offset: 8 2508 * End: 2509 */ 2510