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_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1014 struct nfsd4_clone *clone) 1015 { 1016 struct file *src, *dst; 1017 __be32 status; 1018 1019 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, 1020 &clone->cl_src_stateid, RD_STATE, 1021 &src, NULL); 1022 if (status) { 1023 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); 1024 goto out; 1025 } 1026 1027 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1028 &clone->cl_dst_stateid, WR_STATE, 1029 &dst, NULL); 1030 if (status) { 1031 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); 1032 goto out_put_src; 1033 } 1034 1035 /* fix up for NFS-specific error code */ 1036 if (!S_ISREG(file_inode(src)->i_mode) || 1037 !S_ISREG(file_inode(dst)->i_mode)) { 1038 status = nfserr_wrong_type; 1039 goto out_put_dst; 1040 } 1041 1042 status = nfsd4_clone_file_range(src, clone->cl_src_pos, 1043 dst, clone->cl_dst_pos, clone->cl_count); 1044 1045 out_put_dst: 1046 fput(dst); 1047 out_put_src: 1048 fput(src); 1049 out: 1050 return status; 1051 } 1052 1053 static __be32 1054 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1055 struct nfsd4_fallocate *fallocate, int flags) 1056 { 1057 __be32 status = nfserr_notsupp; 1058 struct file *file; 1059 1060 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1061 &fallocate->falloc_stateid, 1062 WR_STATE, &file, NULL); 1063 if (status != nfs_ok) { 1064 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1065 return status; 1066 } 1067 1068 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file, 1069 fallocate->falloc_offset, 1070 fallocate->falloc_length, 1071 flags); 1072 fput(file); 1073 return status; 1074 } 1075 1076 static __be32 1077 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1078 struct nfsd4_fallocate *fallocate) 1079 { 1080 return nfsd4_fallocate(rqstp, cstate, fallocate, 0); 1081 } 1082 1083 static __be32 1084 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1085 struct nfsd4_fallocate *fallocate) 1086 { 1087 return nfsd4_fallocate(rqstp, cstate, fallocate, 1088 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1089 } 1090 1091 static __be32 1092 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1093 struct nfsd4_seek *seek) 1094 { 1095 int whence; 1096 __be32 status; 1097 struct file *file; 1098 1099 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1100 &seek->seek_stateid, 1101 RD_STATE, &file, NULL); 1102 if (status) { 1103 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1104 return status; 1105 } 1106 1107 switch (seek->seek_whence) { 1108 case NFS4_CONTENT_DATA: 1109 whence = SEEK_DATA; 1110 break; 1111 case NFS4_CONTENT_HOLE: 1112 whence = SEEK_HOLE; 1113 break; 1114 default: 1115 status = nfserr_union_notsupp; 1116 goto out; 1117 } 1118 1119 /* 1120 * Note: This call does change file->f_pos, but nothing in NFSD 1121 * should ever file->f_pos. 1122 */ 1123 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); 1124 if (seek->seek_pos < 0) 1125 status = nfserrno(seek->seek_pos); 1126 else if (seek->seek_pos >= i_size_read(file_inode(file))) 1127 seek->seek_eof = true; 1128 1129 out: 1130 fput(file); 1131 return status; 1132 } 1133 1134 /* This routine never returns NFS_OK! If there are no other errors, it 1135 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1136 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1137 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1138 */ 1139 static __be32 1140 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1141 struct nfsd4_verify *verify) 1142 { 1143 __be32 *buf, *p; 1144 int count; 1145 __be32 status; 1146 1147 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1148 if (status) 1149 return status; 1150 1151 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1152 if (status) 1153 return status; 1154 1155 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1156 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1157 return nfserr_inval; 1158 if (verify->ve_attrlen & 3) 1159 return nfserr_inval; 1160 1161 /* count in words: 1162 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1163 */ 1164 count = 4 + (verify->ve_attrlen >> 2); 1165 buf = kmalloc(count << 2, GFP_KERNEL); 1166 if (!buf) 1167 return nfserr_jukebox; 1168 1169 p = buf; 1170 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1171 cstate->current_fh.fh_export, 1172 cstate->current_fh.fh_dentry, 1173 verify->ve_bmval, 1174 rqstp, 0); 1175 /* 1176 * If nfsd4_encode_fattr() ran out of space, assume that's because 1177 * the attributes are longer (hence different) than those given: 1178 */ 1179 if (status == nfserr_resource) 1180 status = nfserr_not_same; 1181 if (status) 1182 goto out_kfree; 1183 1184 /* skip bitmap */ 1185 p = buf + 1 + ntohl(buf[0]); 1186 status = nfserr_not_same; 1187 if (ntohl(*p++) != verify->ve_attrlen) 1188 goto out_kfree; 1189 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1190 status = nfserr_same; 1191 1192 out_kfree: 1193 kfree(buf); 1194 return status; 1195 } 1196 1197 static __be32 1198 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1199 struct nfsd4_verify *verify) 1200 { 1201 __be32 status; 1202 1203 status = _nfsd4_verify(rqstp, cstate, verify); 1204 return status == nfserr_not_same ? nfs_ok : status; 1205 } 1206 1207 static __be32 1208 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1209 struct nfsd4_verify *verify) 1210 { 1211 __be32 status; 1212 1213 status = _nfsd4_verify(rqstp, cstate, verify); 1214 return status == nfserr_same ? nfs_ok : status; 1215 } 1216 1217 #ifdef CONFIG_NFSD_PNFS 1218 static const struct nfsd4_layout_ops * 1219 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1220 { 1221 if (!exp->ex_layout_types) { 1222 dprintk("%s: export does not support pNFS\n", __func__); 1223 return NULL; 1224 } 1225 1226 if (!(exp->ex_layout_types & (1 << layout_type))) { 1227 dprintk("%s: layout type %d not supported\n", 1228 __func__, layout_type); 1229 return NULL; 1230 } 1231 1232 return nfsd4_layout_ops[layout_type]; 1233 } 1234 1235 static __be32 1236 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1237 struct nfsd4_compound_state *cstate, 1238 struct nfsd4_getdeviceinfo *gdp) 1239 { 1240 const struct nfsd4_layout_ops *ops; 1241 struct nfsd4_deviceid_map *map; 1242 struct svc_export *exp; 1243 __be32 nfserr; 1244 1245 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1246 __func__, 1247 gdp->gd_layout_type, 1248 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1249 gdp->gd_maxcount); 1250 1251 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1252 if (!map) { 1253 dprintk("%s: couldn't find device ID to export mapping!\n", 1254 __func__); 1255 return nfserr_noent; 1256 } 1257 1258 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1259 if (IS_ERR(exp)) { 1260 dprintk("%s: could not find device id\n", __func__); 1261 return nfserr_noent; 1262 } 1263 1264 nfserr = nfserr_layoutunavailable; 1265 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1266 if (!ops) 1267 goto out; 1268 1269 nfserr = nfs_ok; 1270 if (gdp->gd_maxcount != 0) { 1271 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1272 rqstp, cstate->session->se_client, gdp); 1273 } 1274 1275 gdp->gd_notify_types &= ops->notify_types; 1276 out: 1277 exp_put(exp); 1278 return nfserr; 1279 } 1280 1281 static __be32 1282 nfsd4_layoutget(struct svc_rqst *rqstp, 1283 struct nfsd4_compound_state *cstate, 1284 struct nfsd4_layoutget *lgp) 1285 { 1286 struct svc_fh *current_fh = &cstate->current_fh; 1287 const struct nfsd4_layout_ops *ops; 1288 struct nfs4_layout_stateid *ls; 1289 __be32 nfserr; 1290 int accmode; 1291 1292 switch (lgp->lg_seg.iomode) { 1293 case IOMODE_READ: 1294 accmode = NFSD_MAY_READ; 1295 break; 1296 case IOMODE_RW: 1297 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE; 1298 break; 1299 default: 1300 dprintk("%s: invalid iomode %d\n", 1301 __func__, lgp->lg_seg.iomode); 1302 nfserr = nfserr_badiomode; 1303 goto out; 1304 } 1305 1306 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1307 if (nfserr) 1308 goto out; 1309 1310 nfserr = nfserr_layoutunavailable; 1311 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1312 if (!ops) 1313 goto out; 1314 1315 /* 1316 * Verify minlength and range as per RFC5661: 1317 * o If loga_length is less than loga_minlength, 1318 * the metadata server MUST return NFS4ERR_INVAL. 1319 * o If the sum of loga_offset and loga_minlength exceeds 1320 * NFS4_UINT64_MAX, and loga_minlength is not 1321 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1322 * o If the sum of loga_offset and loga_length exceeds 1323 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1324 * the error NFS4ERR_INVAL MUST result. 1325 */ 1326 nfserr = nfserr_inval; 1327 if (lgp->lg_seg.length < lgp->lg_minlength || 1328 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1329 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1330 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1331 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1332 goto out; 1333 if (lgp->lg_seg.length == 0) 1334 goto out; 1335 1336 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1337 true, lgp->lg_layout_type, &ls); 1338 if (nfserr) { 1339 trace_layout_get_lookup_fail(&lgp->lg_sid); 1340 goto out; 1341 } 1342 1343 nfserr = nfserr_recallconflict; 1344 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1345 goto out_put_stid; 1346 1347 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1348 current_fh, lgp); 1349 if (nfserr) 1350 goto out_put_stid; 1351 1352 nfserr = nfsd4_insert_layout(lgp, ls); 1353 1354 out_put_stid: 1355 mutex_unlock(&ls->ls_mutex); 1356 nfs4_put_stid(&ls->ls_stid); 1357 out: 1358 return nfserr; 1359 } 1360 1361 static __be32 1362 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1363 struct nfsd4_compound_state *cstate, 1364 struct nfsd4_layoutcommit *lcp) 1365 { 1366 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1367 struct svc_fh *current_fh = &cstate->current_fh; 1368 const struct nfsd4_layout_ops *ops; 1369 loff_t new_size = lcp->lc_last_wr + 1; 1370 struct inode *inode; 1371 struct nfs4_layout_stateid *ls; 1372 __be32 nfserr; 1373 1374 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 1375 if (nfserr) 1376 goto out; 1377 1378 nfserr = nfserr_layoutunavailable; 1379 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 1380 if (!ops) 1381 goto out; 1382 inode = d_inode(current_fh->fh_dentry); 1383 1384 nfserr = nfserr_inval; 1385 if (new_size <= seg->offset) { 1386 dprintk("pnfsd: last write before layout segment\n"); 1387 goto out; 1388 } 1389 if (new_size > seg->offset + seg->length) { 1390 dprintk("pnfsd: last write beyond layout segment\n"); 1391 goto out; 1392 } 1393 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 1394 dprintk("pnfsd: layoutcommit beyond EOF\n"); 1395 goto out; 1396 } 1397 1398 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 1399 false, lcp->lc_layout_type, 1400 &ls); 1401 if (nfserr) { 1402 trace_layout_commit_lookup_fail(&lcp->lc_sid); 1403 /* fixup error code as per RFC5661 */ 1404 if (nfserr == nfserr_bad_stateid) 1405 nfserr = nfserr_badlayout; 1406 goto out; 1407 } 1408 1409 /* LAYOUTCOMMIT does not require any serialization */ 1410 mutex_unlock(&ls->ls_mutex); 1411 1412 if (new_size > i_size_read(inode)) { 1413 lcp->lc_size_chg = 1; 1414 lcp->lc_newsize = new_size; 1415 } else { 1416 lcp->lc_size_chg = 0; 1417 } 1418 1419 nfserr = ops->proc_layoutcommit(inode, lcp); 1420 nfs4_put_stid(&ls->ls_stid); 1421 out: 1422 return nfserr; 1423 } 1424 1425 static __be32 1426 nfsd4_layoutreturn(struct svc_rqst *rqstp, 1427 struct nfsd4_compound_state *cstate, 1428 struct nfsd4_layoutreturn *lrp) 1429 { 1430 struct svc_fh *current_fh = &cstate->current_fh; 1431 __be32 nfserr; 1432 1433 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 1434 if (nfserr) 1435 goto out; 1436 1437 nfserr = nfserr_layoutunavailable; 1438 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 1439 goto out; 1440 1441 switch (lrp->lr_seg.iomode) { 1442 case IOMODE_READ: 1443 case IOMODE_RW: 1444 case IOMODE_ANY: 1445 break; 1446 default: 1447 dprintk("%s: invalid iomode %d\n", __func__, 1448 lrp->lr_seg.iomode); 1449 nfserr = nfserr_inval; 1450 goto out; 1451 } 1452 1453 switch (lrp->lr_return_type) { 1454 case RETURN_FILE: 1455 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 1456 break; 1457 case RETURN_FSID: 1458 case RETURN_ALL: 1459 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 1460 break; 1461 default: 1462 dprintk("%s: invalid return_type %d\n", __func__, 1463 lrp->lr_return_type); 1464 nfserr = nfserr_inval; 1465 break; 1466 } 1467 out: 1468 return nfserr; 1469 } 1470 #endif /* CONFIG_NFSD_PNFS */ 1471 1472 /* 1473 * NULL call. 1474 */ 1475 static __be32 1476 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1477 { 1478 return nfs_ok; 1479 } 1480 1481 static inline void nfsd4_increment_op_stats(u32 opnum) 1482 { 1483 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1484 nfsdstats.nfs4_opcount[opnum]++; 1485 } 1486 1487 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1488 void *); 1489 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1490 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1491 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1492 1493 enum nfsd4_op_flags { 1494 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1495 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1496 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1497 /* For rfc 5661 section 2.6.3.1.1: */ 1498 OP_HANDLES_WRONGSEC = 1 << 3, 1499 OP_IS_PUTFH_LIKE = 1 << 4, 1500 /* 1501 * These are the ops whose result size we estimate before 1502 * encoding, to avoid performing an op then not being able to 1503 * respond or cache a response. This includes writes and setattrs 1504 * as well as the operations usually called "nonidempotent": 1505 */ 1506 OP_MODIFIES_SOMETHING = 1 << 5, 1507 /* 1508 * Cache compounds containing these ops in the xid-based drc: 1509 * We use the DRC for compounds containing non-idempotent 1510 * operations, *except* those that are 4.1-specific (since 1511 * sessions provide their own EOS), and except for stateful 1512 * operations other than setclientid and setclientid_confirm 1513 * (since sequence numbers provide EOS for open, lock, etc in 1514 * the v4.0 case). 1515 */ 1516 OP_CACHEME = 1 << 6, 1517 /* 1518 * These are ops which clear current state id. 1519 */ 1520 OP_CLEAR_STATEID = 1 << 7, 1521 }; 1522 1523 struct nfsd4_operation { 1524 nfsd4op_func op_func; 1525 u32 op_flags; 1526 char *op_name; 1527 /* Try to get response size before operation */ 1528 nfsd4op_rsize op_rsize_bop; 1529 stateid_getter op_get_currentstateid; 1530 stateid_setter op_set_currentstateid; 1531 }; 1532 1533 static struct nfsd4_operation nfsd4_ops[]; 1534 1535 static const char *nfsd4_op_name(unsigned opnum); 1536 1537 /* 1538 * Enforce NFSv4.1 COMPOUND ordering rules: 1539 * 1540 * Also note, enforced elsewhere: 1541 * - SEQUENCE other than as first op results in 1542 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1543 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1544 * (Enforced in nfsd4_bind_conn_to_session().) 1545 * - DESTROY_SESSION must be the final operation in a compound, if 1546 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1547 * (Enforced in nfsd4_destroy_session().) 1548 */ 1549 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1550 { 1551 struct nfsd4_op *op = &args->ops[0]; 1552 1553 /* These ordering requirements don't apply to NFSv4.0: */ 1554 if (args->minorversion == 0) 1555 return nfs_ok; 1556 /* This is weird, but OK, not our problem: */ 1557 if (args->opcnt == 0) 1558 return nfs_ok; 1559 if (op->status == nfserr_op_illegal) 1560 return nfs_ok; 1561 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1562 return nfserr_op_not_in_session; 1563 if (op->opnum == OP_SEQUENCE) 1564 return nfs_ok; 1565 if (args->opcnt != 1) 1566 return nfserr_not_only_op; 1567 return nfs_ok; 1568 } 1569 1570 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1571 { 1572 return &nfsd4_ops[op->opnum]; 1573 } 1574 1575 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1576 { 1577 if (op->opnum == OP_ILLEGAL) 1578 return false; 1579 return OPDESC(op)->op_flags & OP_CACHEME; 1580 } 1581 1582 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1583 { 1584 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1585 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1586 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1587 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1588 struct nfsd4_operation *thisd; 1589 struct nfsd4_operation *nextd; 1590 1591 thisd = OPDESC(this); 1592 /* 1593 * Most ops check wronsec on our own; only the putfh-like ops 1594 * have special rules. 1595 */ 1596 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1597 return false; 1598 /* 1599 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1600 * put-filehandle operation if we're not going to use the 1601 * result: 1602 */ 1603 if (argp->opcnt == resp->opcnt) 1604 return false; 1605 if (next->opnum == OP_ILLEGAL) 1606 return false; 1607 nextd = OPDESC(next); 1608 /* 1609 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1610 * errors themselves as necessary; others should check for them 1611 * now: 1612 */ 1613 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1614 } 1615 1616 static void svcxdr_init_encode(struct svc_rqst *rqstp, 1617 struct nfsd4_compoundres *resp) 1618 { 1619 struct xdr_stream *xdr = &resp->xdr; 1620 struct xdr_buf *buf = &rqstp->rq_res; 1621 struct kvec *head = buf->head; 1622 1623 xdr->buf = buf; 1624 xdr->iov = head; 1625 xdr->p = head->iov_base + head->iov_len; 1626 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1627 /* Tail and page_len should be zero at this point: */ 1628 buf->len = buf->head[0].iov_len; 1629 xdr->scratch.iov_len = 0; 1630 xdr->page_ptr = buf->pages - 1; 1631 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1632 - rqstp->rq_auth_slack; 1633 } 1634 1635 /* 1636 * COMPOUND call. 1637 */ 1638 static __be32 1639 nfsd4_proc_compound(struct svc_rqst *rqstp, 1640 struct nfsd4_compoundargs *args, 1641 struct nfsd4_compoundres *resp) 1642 { 1643 struct nfsd4_op *op; 1644 struct nfsd4_operation *opdesc; 1645 struct nfsd4_compound_state *cstate = &resp->cstate; 1646 struct svc_fh *current_fh = &cstate->current_fh; 1647 struct svc_fh *save_fh = &cstate->save_fh; 1648 __be32 status; 1649 1650 svcxdr_init_encode(rqstp, resp); 1651 resp->tagp = resp->xdr.p; 1652 /* reserve space for: taglen, tag, and opcnt */ 1653 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1654 resp->taglen = args->taglen; 1655 resp->tag = args->tag; 1656 resp->rqstp = rqstp; 1657 cstate->minorversion = args->minorversion; 1658 fh_init(current_fh, NFS4_FHSIZE); 1659 fh_init(save_fh, NFS4_FHSIZE); 1660 /* 1661 * Don't use the deferral mechanism for NFSv4; compounds make it 1662 * too hard to avoid non-idempotency problems. 1663 */ 1664 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1665 1666 /* 1667 * According to RFC3010, this takes precedence over all other errors. 1668 */ 1669 status = nfserr_minor_vers_mismatch; 1670 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1671 goto out; 1672 1673 status = nfs41_check_op_ordering(args); 1674 if (status) { 1675 op = &args->ops[0]; 1676 op->status = status; 1677 goto encode_op; 1678 } 1679 1680 while (!status && resp->opcnt < args->opcnt) { 1681 op = &args->ops[resp->opcnt++]; 1682 1683 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1684 resp->opcnt, args->opcnt, op->opnum, 1685 nfsd4_op_name(op->opnum)); 1686 /* 1687 * The XDR decode routines may have pre-set op->status; 1688 * for example, if there is a miscellaneous XDR error 1689 * it will be set to nfserr_bad_xdr. 1690 */ 1691 if (op->status) { 1692 if (op->opnum == OP_OPEN) 1693 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1694 goto encode_op; 1695 } 1696 1697 opdesc = OPDESC(op); 1698 1699 if (!current_fh->fh_dentry) { 1700 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1701 op->status = nfserr_nofilehandle; 1702 goto encode_op; 1703 } 1704 } else if (current_fh->fh_export->ex_fslocs.migrated && 1705 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1706 op->status = nfserr_moved; 1707 goto encode_op; 1708 } 1709 1710 fh_clear_wcc(current_fh); 1711 1712 /* If op is non-idempotent */ 1713 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1714 /* 1715 * Don't execute this op if we couldn't encode a 1716 * succesful reply: 1717 */ 1718 u32 plen = opdesc->op_rsize_bop(rqstp, op); 1719 /* 1720 * Plus if there's another operation, make sure 1721 * we'll have space to at least encode an error: 1722 */ 1723 if (resp->opcnt < args->opcnt) 1724 plen += COMPOUND_ERR_SLACK_SPACE; 1725 op->status = nfsd4_check_resp_size(resp, plen); 1726 } 1727 1728 if (op->status) 1729 goto encode_op; 1730 1731 if (opdesc->op_get_currentstateid) 1732 opdesc->op_get_currentstateid(cstate, &op->u); 1733 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1734 1735 if (!op->status) { 1736 if (opdesc->op_set_currentstateid) 1737 opdesc->op_set_currentstateid(cstate, &op->u); 1738 1739 if (opdesc->op_flags & OP_CLEAR_STATEID) 1740 clear_current_stateid(cstate); 1741 1742 if (need_wrongsec_check(rqstp)) 1743 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 1744 } 1745 1746 encode_op: 1747 /* Only from SEQUENCE */ 1748 if (cstate->status == nfserr_replay_cache) { 1749 dprintk("%s NFS4.1 replay from cache\n", __func__); 1750 status = op->status; 1751 goto out; 1752 } 1753 if (op->status == nfserr_replay_me) { 1754 op->replay = &cstate->replay_owner->so_replay; 1755 nfsd4_encode_replay(&resp->xdr, op); 1756 status = op->status = op->replay->rp_status; 1757 } else { 1758 nfsd4_encode_operation(resp, op); 1759 status = op->status; 1760 } 1761 1762 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1763 args->ops, args->opcnt, resp->opcnt, op->opnum, 1764 be32_to_cpu(status)); 1765 1766 nfsd4_cstate_clear_replay(cstate); 1767 nfsd4_increment_op_stats(op->opnum); 1768 } 1769 1770 cstate->status = status; 1771 fh_put(current_fh); 1772 fh_put(save_fh); 1773 BUG_ON(cstate->replay_owner); 1774 out: 1775 /* Reset deferral mechanism for RPC deferrals */ 1776 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1777 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1778 return status; 1779 } 1780 1781 #define op_encode_hdr_size (2) 1782 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1783 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1784 #define op_encode_change_info_maxsz (5) 1785 #define nfs4_fattr_bitmap_maxsz (4) 1786 1787 /* We'll fall back on returning no lockowner if run out of space: */ 1788 #define op_encode_lockowner_maxsz (0) 1789 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1790 1791 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1792 1793 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1794 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1795 op_encode_ace_maxsz) 1796 1797 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1798 1799 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1800 { 1801 return (op_encode_hdr_size) * sizeof(__be32); 1802 } 1803 1804 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1805 { 1806 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1807 } 1808 1809 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1810 { 1811 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1812 } 1813 1814 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1815 { 1816 return (op_encode_hdr_size + op_encode_change_info_maxsz 1817 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1818 } 1819 1820 /* 1821 * Note since this is an idempotent operation we won't insist on failing 1822 * the op prematurely if the estimate is too large. We may turn off splice 1823 * reads unnecessarily. 1824 */ 1825 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1826 struct nfsd4_op *op) 1827 { 1828 u32 *bmap = op->u.getattr.ga_bmval; 1829 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1830 u32 ret = 0; 1831 1832 if (bmap0 & FATTR4_WORD0_ACL) 1833 return svc_max_payload(rqstp); 1834 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1835 return svc_max_payload(rqstp); 1836 1837 if (bmap1 & FATTR4_WORD1_OWNER) { 1838 ret += IDMAP_NAMESZ + 4; 1839 bmap1 &= ~FATTR4_WORD1_OWNER; 1840 } 1841 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1842 ret += IDMAP_NAMESZ + 4; 1843 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1844 } 1845 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1846 ret += NFS4_FHSIZE + 4; 1847 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1848 } 1849 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1850 ret += NFS4_MAXLABELLEN + 12; 1851 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1852 } 1853 /* 1854 * Largest of remaining attributes are 16 bytes (e.g., 1855 * supported_attributes) 1856 */ 1857 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1858 /* bitmask, length */ 1859 ret += 20; 1860 return ret; 1861 } 1862 1863 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1864 { 1865 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1866 * sizeof(__be32); 1867 } 1868 1869 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1870 { 1871 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1872 * sizeof(__be32); 1873 } 1874 1875 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1876 { 1877 return (op_encode_hdr_size + op_encode_stateid_maxsz 1878 + op_encode_change_info_maxsz + 1 1879 + nfs4_fattr_bitmap_maxsz 1880 + op_encode_delegation_maxsz) * sizeof(__be32); 1881 } 1882 1883 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1884 { 1885 u32 maxcount = 0, rlen = 0; 1886 1887 maxcount = svc_max_payload(rqstp); 1888 rlen = min(op->u.read.rd_length, maxcount); 1889 1890 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1891 } 1892 1893 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1894 { 1895 u32 maxcount = 0, rlen = 0; 1896 1897 maxcount = svc_max_payload(rqstp); 1898 rlen = min(op->u.readdir.rd_maxcount, maxcount); 1899 1900 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1901 XDR_QUADLEN(rlen)) * sizeof(__be32); 1902 } 1903 1904 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1905 { 1906 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1907 * sizeof(__be32); 1908 } 1909 1910 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1911 { 1912 return (op_encode_hdr_size + op_encode_change_info_maxsz 1913 + op_encode_change_info_maxsz) * sizeof(__be32); 1914 } 1915 1916 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1917 struct nfsd4_op *op) 1918 { 1919 return (op_encode_hdr_size 1920 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 1921 } 1922 1923 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1924 { 1925 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1926 } 1927 1928 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1929 { 1930 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1931 sizeof(__be32); 1932 } 1933 1934 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1935 { 1936 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 1937 } 1938 1939 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1940 { 1941 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1942 1 + 1 + /* eir_flags, spr_how */\ 1943 4 + /* spo_must_enforce & _allow with bitmap */\ 1944 2 + /*eir_server_owner.so_minor_id */\ 1945 /* eir_server_owner.so_major_id<> */\ 1946 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1947 /* eir_server_scope<> */\ 1948 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1949 1 + /* eir_server_impl_id array length */\ 1950 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1951 } 1952 1953 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1954 { 1955 return (op_encode_hdr_size + \ 1956 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1957 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1958 } 1959 1960 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1961 { 1962 return (op_encode_hdr_size + \ 1963 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1964 2 + /* csr_sequence, csr_flags */\ 1965 op_encode_channel_attrs_maxsz + \ 1966 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1967 } 1968 1969 #ifdef CONFIG_NFSD_PNFS 1970 /* 1971 * At this stage we don't really know what layout driver will handle the request, 1972 * so we need to define an arbitrary upper bound here. 1973 */ 1974 #define MAX_LAYOUT_SIZE 128 1975 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1976 { 1977 return (op_encode_hdr_size + 1978 1 /* logr_return_on_close */ + 1979 op_encode_stateid_maxsz + 1980 1 /* nr of layouts */ + 1981 MAX_LAYOUT_SIZE) * sizeof(__be32); 1982 } 1983 1984 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1985 { 1986 return (op_encode_hdr_size + 1987 1 /* locr_newsize */ + 1988 2 /* ns_size */) * sizeof(__be32); 1989 } 1990 1991 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1992 { 1993 return (op_encode_hdr_size + 1994 1 /* lrs_stateid */ + 1995 op_encode_stateid_maxsz) * sizeof(__be32); 1996 } 1997 #endif /* CONFIG_NFSD_PNFS */ 1998 1999 static struct nfsd4_operation nfsd4_ops[] = { 2000 [OP_ACCESS] = { 2001 .op_func = (nfsd4op_func)nfsd4_access, 2002 .op_name = "OP_ACCESS", 2003 }, 2004 [OP_CLOSE] = { 2005 .op_func = (nfsd4op_func)nfsd4_close, 2006 .op_flags = OP_MODIFIES_SOMETHING, 2007 .op_name = "OP_CLOSE", 2008 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2009 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 2010 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 2011 }, 2012 [OP_COMMIT] = { 2013 .op_func = (nfsd4op_func)nfsd4_commit, 2014 .op_flags = OP_MODIFIES_SOMETHING, 2015 .op_name = "OP_COMMIT", 2016 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 2017 }, 2018 [OP_CREATE] = { 2019 .op_func = (nfsd4op_func)nfsd4_create, 2020 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2021 .op_name = "OP_CREATE", 2022 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 2023 }, 2024 [OP_DELEGRETURN] = { 2025 .op_func = (nfsd4op_func)nfsd4_delegreturn, 2026 .op_flags = OP_MODIFIES_SOMETHING, 2027 .op_name = "OP_DELEGRETURN", 2028 .op_rsize_bop = nfsd4_only_status_rsize, 2029 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 2030 }, 2031 [OP_GETATTR] = { 2032 .op_func = (nfsd4op_func)nfsd4_getattr, 2033 .op_flags = ALLOWED_ON_ABSENT_FS, 2034 .op_rsize_bop = nfsd4_getattr_rsize, 2035 .op_name = "OP_GETATTR", 2036 }, 2037 [OP_GETFH] = { 2038 .op_func = (nfsd4op_func)nfsd4_getfh, 2039 .op_name = "OP_GETFH", 2040 }, 2041 [OP_LINK] = { 2042 .op_func = (nfsd4op_func)nfsd4_link, 2043 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2044 | OP_CACHEME, 2045 .op_name = "OP_LINK", 2046 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 2047 }, 2048 [OP_LOCK] = { 2049 .op_func = (nfsd4op_func)nfsd4_lock, 2050 .op_flags = OP_MODIFIES_SOMETHING, 2051 .op_name = "OP_LOCK", 2052 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 2053 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 2054 }, 2055 [OP_LOCKT] = { 2056 .op_func = (nfsd4op_func)nfsd4_lockt, 2057 .op_name = "OP_LOCKT", 2058 }, 2059 [OP_LOCKU] = { 2060 .op_func = (nfsd4op_func)nfsd4_locku, 2061 .op_flags = OP_MODIFIES_SOMETHING, 2062 .op_name = "OP_LOCKU", 2063 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2064 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 2065 }, 2066 [OP_LOOKUP] = { 2067 .op_func = (nfsd4op_func)nfsd4_lookup, 2068 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2069 .op_name = "OP_LOOKUP", 2070 }, 2071 [OP_LOOKUPP] = { 2072 .op_func = (nfsd4op_func)nfsd4_lookupp, 2073 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2074 .op_name = "OP_LOOKUPP", 2075 }, 2076 [OP_NVERIFY] = { 2077 .op_func = (nfsd4op_func)nfsd4_nverify, 2078 .op_name = "OP_NVERIFY", 2079 }, 2080 [OP_OPEN] = { 2081 .op_func = (nfsd4op_func)nfsd4_open, 2082 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2083 .op_name = "OP_OPEN", 2084 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 2085 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 2086 }, 2087 [OP_OPEN_CONFIRM] = { 2088 .op_func = (nfsd4op_func)nfsd4_open_confirm, 2089 .op_flags = OP_MODIFIES_SOMETHING, 2090 .op_name = "OP_OPEN_CONFIRM", 2091 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2092 }, 2093 [OP_OPEN_DOWNGRADE] = { 2094 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 2095 .op_flags = OP_MODIFIES_SOMETHING, 2096 .op_name = "OP_OPEN_DOWNGRADE", 2097 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2098 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 2099 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 2100 }, 2101 [OP_PUTFH] = { 2102 .op_func = (nfsd4op_func)nfsd4_putfh, 2103 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2104 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2105 .op_name = "OP_PUTFH", 2106 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2107 }, 2108 [OP_PUTPUBFH] = { 2109 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2110 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2111 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2112 .op_name = "OP_PUTPUBFH", 2113 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2114 }, 2115 [OP_PUTROOTFH] = { 2116 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2117 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2118 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2119 .op_name = "OP_PUTROOTFH", 2120 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2121 }, 2122 [OP_READ] = { 2123 .op_func = (nfsd4op_func)nfsd4_read, 2124 .op_name = "OP_READ", 2125 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 2126 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 2127 }, 2128 [OP_READDIR] = { 2129 .op_func = (nfsd4op_func)nfsd4_readdir, 2130 .op_name = "OP_READDIR", 2131 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 2132 }, 2133 [OP_READLINK] = { 2134 .op_func = (nfsd4op_func)nfsd4_readlink, 2135 .op_name = "OP_READLINK", 2136 }, 2137 [OP_REMOVE] = { 2138 .op_func = (nfsd4op_func)nfsd4_remove, 2139 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2140 .op_name = "OP_REMOVE", 2141 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 2142 }, 2143 [OP_RENAME] = { 2144 .op_func = (nfsd4op_func)nfsd4_rename, 2145 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2146 .op_name = "OP_RENAME", 2147 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 2148 }, 2149 [OP_RENEW] = { 2150 .op_func = (nfsd4op_func)nfsd4_renew, 2151 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2152 | OP_MODIFIES_SOMETHING, 2153 .op_name = "OP_RENEW", 2154 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2155 2156 }, 2157 [OP_RESTOREFH] = { 2158 .op_func = (nfsd4op_func)nfsd4_restorefh, 2159 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2160 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2161 .op_name = "OP_RESTOREFH", 2162 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2163 }, 2164 [OP_SAVEFH] = { 2165 .op_func = (nfsd4op_func)nfsd4_savefh, 2166 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2167 .op_name = "OP_SAVEFH", 2168 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2169 }, 2170 [OP_SECINFO] = { 2171 .op_func = (nfsd4op_func)nfsd4_secinfo, 2172 .op_flags = OP_HANDLES_WRONGSEC, 2173 .op_name = "OP_SECINFO", 2174 }, 2175 [OP_SETATTR] = { 2176 .op_func = (nfsd4op_func)nfsd4_setattr, 2177 .op_name = "OP_SETATTR", 2178 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2179 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 2180 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 2181 }, 2182 [OP_SETCLIENTID] = { 2183 .op_func = (nfsd4op_func)nfsd4_setclientid, 2184 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2185 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2186 .op_name = "OP_SETCLIENTID", 2187 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 2188 }, 2189 [OP_SETCLIENTID_CONFIRM] = { 2190 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 2191 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2192 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2193 .op_name = "OP_SETCLIENTID_CONFIRM", 2194 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2195 }, 2196 [OP_VERIFY] = { 2197 .op_func = (nfsd4op_func)nfsd4_verify, 2198 .op_name = "OP_VERIFY", 2199 }, 2200 [OP_WRITE] = { 2201 .op_func = (nfsd4op_func)nfsd4_write, 2202 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2203 .op_name = "OP_WRITE", 2204 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 2205 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 2206 }, 2207 [OP_RELEASE_LOCKOWNER] = { 2208 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 2209 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2210 | OP_MODIFIES_SOMETHING, 2211 .op_name = "OP_RELEASE_LOCKOWNER", 2212 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2213 }, 2214 2215 /* NFSv4.1 operations */ 2216 [OP_EXCHANGE_ID] = { 2217 .op_func = (nfsd4op_func)nfsd4_exchange_id, 2218 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2219 | OP_MODIFIES_SOMETHING, 2220 .op_name = "OP_EXCHANGE_ID", 2221 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 2222 }, 2223 [OP_BACKCHANNEL_CTL] = { 2224 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 2225 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2226 .op_name = "OP_BACKCHANNEL_CTL", 2227 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2228 }, 2229 [OP_BIND_CONN_TO_SESSION] = { 2230 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 2231 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2232 | OP_MODIFIES_SOMETHING, 2233 .op_name = "OP_BIND_CONN_TO_SESSION", 2234 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 2235 }, 2236 [OP_CREATE_SESSION] = { 2237 .op_func = (nfsd4op_func)nfsd4_create_session, 2238 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2239 | OP_MODIFIES_SOMETHING, 2240 .op_name = "OP_CREATE_SESSION", 2241 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 2242 }, 2243 [OP_DESTROY_SESSION] = { 2244 .op_func = (nfsd4op_func)nfsd4_destroy_session, 2245 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2246 | OP_MODIFIES_SOMETHING, 2247 .op_name = "OP_DESTROY_SESSION", 2248 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2249 }, 2250 [OP_SEQUENCE] = { 2251 .op_func = (nfsd4op_func)nfsd4_sequence, 2252 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 2253 .op_name = "OP_SEQUENCE", 2254 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize, 2255 }, 2256 [OP_DESTROY_CLIENTID] = { 2257 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 2258 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2259 | OP_MODIFIES_SOMETHING, 2260 .op_name = "OP_DESTROY_CLIENTID", 2261 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2262 }, 2263 [OP_RECLAIM_COMPLETE] = { 2264 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 2265 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2266 .op_name = "OP_RECLAIM_COMPLETE", 2267 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2268 }, 2269 [OP_SECINFO_NO_NAME] = { 2270 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 2271 .op_flags = OP_HANDLES_WRONGSEC, 2272 .op_name = "OP_SECINFO_NO_NAME", 2273 }, 2274 [OP_TEST_STATEID] = { 2275 .op_func = (nfsd4op_func)nfsd4_test_stateid, 2276 .op_flags = ALLOWED_WITHOUT_FH, 2277 .op_name = "OP_TEST_STATEID", 2278 }, 2279 [OP_FREE_STATEID] = { 2280 .op_func = (nfsd4op_func)nfsd4_free_stateid, 2281 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2282 .op_name = "OP_FREE_STATEID", 2283 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 2284 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2285 }, 2286 #ifdef CONFIG_NFSD_PNFS 2287 [OP_GETDEVICEINFO] = { 2288 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo, 2289 .op_flags = ALLOWED_WITHOUT_FH, 2290 .op_name = "OP_GETDEVICEINFO", 2291 }, 2292 [OP_LAYOUTGET] = { 2293 .op_func = (nfsd4op_func)nfsd4_layoutget, 2294 .op_flags = OP_MODIFIES_SOMETHING, 2295 .op_name = "OP_LAYOUTGET", 2296 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize, 2297 }, 2298 [OP_LAYOUTCOMMIT] = { 2299 .op_func = (nfsd4op_func)nfsd4_layoutcommit, 2300 .op_flags = OP_MODIFIES_SOMETHING, 2301 .op_name = "OP_LAYOUTCOMMIT", 2302 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize, 2303 }, 2304 [OP_LAYOUTRETURN] = { 2305 .op_func = (nfsd4op_func)nfsd4_layoutreturn, 2306 .op_flags = OP_MODIFIES_SOMETHING, 2307 .op_name = "OP_LAYOUTRETURN", 2308 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize, 2309 }, 2310 #endif /* CONFIG_NFSD_PNFS */ 2311 2312 /* NFSv4.2 operations */ 2313 [OP_ALLOCATE] = { 2314 .op_func = (nfsd4op_func)nfsd4_allocate, 2315 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2316 .op_name = "OP_ALLOCATE", 2317 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2318 }, 2319 [OP_DEALLOCATE] = { 2320 .op_func = (nfsd4op_func)nfsd4_deallocate, 2321 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2322 .op_name = "OP_DEALLOCATE", 2323 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2324 }, 2325 [OP_CLONE] = { 2326 .op_func = (nfsd4op_func)nfsd4_clone, 2327 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2328 .op_name = "OP_CLONE", 2329 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2330 }, 2331 [OP_SEEK] = { 2332 .op_func = (nfsd4op_func)nfsd4_seek, 2333 .op_name = "OP_SEEK", 2334 }, 2335 }; 2336 2337 /** 2338 * nfsd4_spo_must_allow - Determine if the compound op contains an 2339 * operation that is allowed to be sent with machine credentials 2340 * 2341 * @rqstp: a pointer to the struct svc_rqst 2342 * 2343 * Checks to see if the compound contains a spo_must_allow op 2344 * and confirms that it was sent with the proper machine creds. 2345 */ 2346 2347 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 2348 { 2349 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2350 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2351 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2352 struct nfsd4_compound_state *cstate = &resp->cstate; 2353 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 2354 u32 opiter; 2355 2356 if (!cstate->minorversion) 2357 return false; 2358 2359 if (cstate->spo_must_allowed == true) 2360 return true; 2361 2362 opiter = resp->opcnt; 2363 while (opiter < argp->opcnt) { 2364 this = &argp->ops[opiter++]; 2365 if (test_bit(this->opnum, allow->u.longs) && 2366 cstate->clp->cl_mach_cred && 2367 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 2368 cstate->spo_must_allowed = true; 2369 return true; 2370 } 2371 } 2372 cstate->spo_must_allowed = false; 2373 return false; 2374 } 2375 2376 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 2377 { 2378 struct nfsd4_operation *opdesc; 2379 nfsd4op_rsize estimator; 2380 2381 if (op->opnum == OP_ILLEGAL) 2382 return op_encode_hdr_size * sizeof(__be32); 2383 opdesc = OPDESC(op); 2384 estimator = opdesc->op_rsize_bop; 2385 return estimator ? estimator(rqstp, op) : PAGE_SIZE; 2386 } 2387 2388 void warn_on_nonidempotent_op(struct nfsd4_op *op) 2389 { 2390 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 2391 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 2392 op->opnum, nfsd4_op_name(op->opnum)); 2393 WARN_ON_ONCE(1); 2394 } 2395 } 2396 2397 static const char *nfsd4_op_name(unsigned opnum) 2398 { 2399 if (opnum < ARRAY_SIZE(nfsd4_ops)) 2400 return nfsd4_ops[opnum].op_name; 2401 return "unknown_operation"; 2402 } 2403 2404 #define nfsd4_voidres nfsd4_voidargs 2405 struct nfsd4_voidargs { int dummy; }; 2406 2407 static struct svc_procedure nfsd_procedures4[2] = { 2408 [NFSPROC4_NULL] = { 2409 .pc_func = (svc_procfunc) nfsd4_proc_null, 2410 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 2411 .pc_argsize = sizeof(struct nfsd4_voidargs), 2412 .pc_ressize = sizeof(struct nfsd4_voidres), 2413 .pc_cachetype = RC_NOCACHE, 2414 .pc_xdrressize = 1, 2415 }, 2416 [NFSPROC4_COMPOUND] = { 2417 .pc_func = (svc_procfunc) nfsd4_proc_compound, 2418 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 2419 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 2420 .pc_argsize = sizeof(struct nfsd4_compoundargs), 2421 .pc_ressize = sizeof(struct nfsd4_compoundres), 2422 .pc_release = nfsd4_release_compoundargs, 2423 .pc_cachetype = RC_NOCACHE, 2424 .pc_xdrressize = NFSD_BUFSIZE/4, 2425 }, 2426 }; 2427 2428 struct svc_version nfsd_version4 = { 2429 .vs_vers = 4, 2430 .vs_nproc = 2, 2431 .vs_proc = nfsd_procedures4, 2432 .vs_dispatch = nfsd_dispatch, 2433 .vs_xdrsize = NFS4_SVC_XDRSIZE, 2434 .vs_rpcb_optnl = 1, 2435 }; 2436 2437 /* 2438 * Local variables: 2439 * c-basic-offset: 8 2440 * End: 2441 */ 2442