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 = resfh->fh_dentry->d_inode; 56 int status; 57 58 mutex_lock(&inode->i_mutex); 59 status = security_inode_setsecctx(resfh->fh_dentry, 60 label->data, label->len); 61 mutex_unlock(&inode->i_mutex); 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(dentry->d_inode)) 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 = fh->fh_dentry->d_inode->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, use the returned bitmask 280 * to indicate which attributes we used to store the 281 * verifier: 282 */ 283 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && 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 nfsd4_compoundres *resp; 366 struct net *net = SVC_NET(rqstp); 367 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 368 369 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 370 (int)open->op_fname.len, open->op_fname.data, 371 open->op_openowner); 372 373 /* This check required by spec. */ 374 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 375 return nfserr_inval; 376 377 open->op_created = 0; 378 /* 379 * RFC5661 18.51.3 380 * Before RECLAIM_COMPLETE done, server should deny new lock 381 */ 382 if (nfsd4_has_session(cstate) && 383 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 384 &cstate->session->se_client->cl_flags) && 385 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 386 return nfserr_grace; 387 388 if (nfsd4_has_session(cstate)) 389 copy_clientid(&open->op_clientid, cstate->session); 390 391 /* check seqid for replay. set nfs4_owner */ 392 resp = rqstp->rq_resp; 393 status = nfsd4_process_open1(&resp->cstate, open, nn); 394 if (status == nfserr_replay_me) { 395 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 396 fh_put(&cstate->current_fh); 397 fh_copy_shallow(&cstate->current_fh.fh_handle, 398 &rp->rp_openfh); 399 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 400 if (status) 401 dprintk("nfsd4_open: replay failed" 402 " restoring previous filehandle\n"); 403 else 404 status = nfserr_replay_me; 405 } 406 if (status) 407 goto out; 408 if (open->op_xdr_error) { 409 status = open->op_xdr_error; 410 goto out; 411 } 412 413 status = nfsd4_check_open_attributes(rqstp, cstate, open); 414 if (status) 415 goto out; 416 417 /* Openowner is now set, so sequence id will get bumped. Now we need 418 * these checks before we do any creates: */ 419 status = nfserr_grace; 420 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 421 goto out; 422 status = nfserr_no_grace; 423 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 424 goto out; 425 426 switch (open->op_claim_type) { 427 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 428 case NFS4_OPEN_CLAIM_NULL: 429 status = do_open_lookup(rqstp, cstate, open, &resfh); 430 if (status) 431 goto out; 432 break; 433 case NFS4_OPEN_CLAIM_PREVIOUS: 434 status = nfs4_check_open_reclaim(&open->op_clientid, 435 cstate, nn); 436 if (status) 437 goto out; 438 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 439 case NFS4_OPEN_CLAIM_FH: 440 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 441 status = do_open_fhandle(rqstp, cstate, open); 442 if (status) 443 goto out; 444 resfh = &cstate->current_fh; 445 break; 446 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 447 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 448 dprintk("NFSD: unsupported OPEN claim type %d\n", 449 open->op_claim_type); 450 status = nfserr_notsupp; 451 goto out; 452 default: 453 dprintk("NFSD: Invalid OPEN claim type %d\n", 454 open->op_claim_type); 455 status = nfserr_inval; 456 goto out; 457 } 458 /* 459 * nfsd4_process_open2() does the actual opening of the file. If 460 * successful, it (1) truncates the file if open->op_truncate was 461 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 462 */ 463 status = nfsd4_process_open2(rqstp, resfh, open); 464 WARN(status && open->op_created, 465 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 466 be32_to_cpu(status)); 467 out: 468 if (resfh && resfh != &cstate->current_fh) { 469 fh_dup2(&cstate->current_fh, resfh); 470 fh_put(resfh); 471 kfree(resfh); 472 } 473 nfsd4_cleanup_open_state(cstate, open, status); 474 nfsd4_bump_seqid(cstate, status); 475 return status; 476 } 477 478 /* 479 * OPEN is the only seqid-mutating operation whose decoding can fail 480 * with a seqid-mutating error (specifically, decoding of user names in 481 * the attributes). Therefore we have to do some processing to look up 482 * the stateowner so that we can bump the seqid. 483 */ 484 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 485 { 486 struct nfsd4_open *open = (struct nfsd4_open *)&op->u; 487 488 if (!seqid_mutating_err(ntohl(op->status))) 489 return op->status; 490 if (nfsd4_has_session(cstate)) 491 return op->status; 492 open->op_xdr_error = op->status; 493 return nfsd4_open(rqstp, cstate, open); 494 } 495 496 /* 497 * filehandle-manipulating ops. 498 */ 499 static __be32 500 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 501 struct svc_fh **getfh) 502 { 503 if (!cstate->current_fh.fh_dentry) 504 return nfserr_nofilehandle; 505 506 *getfh = &cstate->current_fh; 507 return nfs_ok; 508 } 509 510 static __be32 511 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 512 struct nfsd4_putfh *putfh) 513 { 514 fh_put(&cstate->current_fh); 515 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 516 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 517 putfh->pf_fhlen); 518 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 519 } 520 521 static __be32 522 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 523 void *arg) 524 { 525 __be32 status; 526 527 fh_put(&cstate->current_fh); 528 status = exp_pseudoroot(rqstp, &cstate->current_fh); 529 return status; 530 } 531 532 static __be32 533 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 534 void *arg) 535 { 536 if (!cstate->save_fh.fh_dentry) 537 return nfserr_restorefh; 538 539 fh_dup2(&cstate->current_fh, &cstate->save_fh); 540 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 541 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 542 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 543 } 544 return nfs_ok; 545 } 546 547 static __be32 548 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 549 void *arg) 550 { 551 if (!cstate->current_fh.fh_dentry) 552 return nfserr_nofilehandle; 553 554 fh_dup2(&cstate->save_fh, &cstate->current_fh); 555 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 556 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 557 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 558 } 559 return nfs_ok; 560 } 561 562 /* 563 * misc nfsv4 ops 564 */ 565 static __be32 566 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 567 struct nfsd4_access *access) 568 { 569 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 570 return nfserr_inval; 571 572 access->ac_resp_access = access->ac_req_access; 573 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 574 &access->ac_supported); 575 } 576 577 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 578 { 579 __be32 verf[2]; 580 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 581 582 /* 583 * This is opaque to client, so no need to byte-swap. Use 584 * __force to keep sparse happy 585 */ 586 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec; 587 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec; 588 memcpy(verifier->data, verf, sizeof(verifier->data)); 589 } 590 591 static __be32 592 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 593 struct nfsd4_commit *commit) 594 { 595 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 596 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 597 commit->co_count); 598 } 599 600 static __be32 601 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 602 struct nfsd4_create *create) 603 { 604 struct svc_fh resfh; 605 __be32 status; 606 dev_t rdev; 607 608 fh_init(&resfh, NFS4_FHSIZE); 609 610 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 611 NFSD_MAY_CREATE); 612 if (status) 613 return status; 614 615 status = check_attr_support(rqstp, cstate, create->cr_bmval, 616 nfsd_attrmask); 617 if (status) 618 return status; 619 620 switch (create->cr_type) { 621 case NF4LNK: 622 status = nfsd_symlink(rqstp, &cstate->current_fh, 623 create->cr_name, create->cr_namelen, 624 create->cr_data, &resfh); 625 break; 626 627 case NF4BLK: 628 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 629 if (MAJOR(rdev) != create->cr_specdata1 || 630 MINOR(rdev) != create->cr_specdata2) 631 return nfserr_inval; 632 status = nfsd_create(rqstp, &cstate->current_fh, 633 create->cr_name, create->cr_namelen, 634 &create->cr_iattr, S_IFBLK, rdev, &resfh); 635 break; 636 637 case NF4CHR: 638 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 639 if (MAJOR(rdev) != create->cr_specdata1 || 640 MINOR(rdev) != create->cr_specdata2) 641 return nfserr_inval; 642 status = nfsd_create(rqstp, &cstate->current_fh, 643 create->cr_name, create->cr_namelen, 644 &create->cr_iattr,S_IFCHR, rdev, &resfh); 645 break; 646 647 case NF4SOCK: 648 status = nfsd_create(rqstp, &cstate->current_fh, 649 create->cr_name, create->cr_namelen, 650 &create->cr_iattr, S_IFSOCK, 0, &resfh); 651 break; 652 653 case NF4FIFO: 654 status = nfsd_create(rqstp, &cstate->current_fh, 655 create->cr_name, create->cr_namelen, 656 &create->cr_iattr, S_IFIFO, 0, &resfh); 657 break; 658 659 case NF4DIR: 660 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 661 status = nfsd_create(rqstp, &cstate->current_fh, 662 create->cr_name, create->cr_namelen, 663 &create->cr_iattr, S_IFDIR, 0, &resfh); 664 break; 665 666 default: 667 status = nfserr_badtype; 668 } 669 670 if (status) 671 goto out; 672 673 if (create->cr_label.len) 674 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 675 676 if (create->cr_acl != NULL) 677 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 678 create->cr_bmval); 679 680 fh_unlock(&cstate->current_fh); 681 set_change_info(&create->cr_cinfo, &cstate->current_fh); 682 fh_dup2(&cstate->current_fh, &resfh); 683 out: 684 fh_put(&resfh); 685 return status; 686 } 687 688 static __be32 689 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 690 struct nfsd4_getattr *getattr) 691 { 692 __be32 status; 693 694 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 695 if (status) 696 return status; 697 698 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 699 return nfserr_inval; 700 701 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 702 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 703 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 704 705 getattr->ga_fhp = &cstate->current_fh; 706 return nfs_ok; 707 } 708 709 static __be32 710 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 711 struct nfsd4_link *link) 712 { 713 __be32 status = nfserr_nofilehandle; 714 715 if (!cstate->save_fh.fh_dentry) 716 return status; 717 status = nfsd_link(rqstp, &cstate->current_fh, 718 link->li_name, link->li_namelen, &cstate->save_fh); 719 if (!status) 720 set_change_info(&link->li_cinfo, &cstate->current_fh); 721 return status; 722 } 723 724 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 725 { 726 struct svc_fh tmp_fh; 727 __be32 ret; 728 729 fh_init(&tmp_fh, NFS4_FHSIZE); 730 ret = exp_pseudoroot(rqstp, &tmp_fh); 731 if (ret) 732 return ret; 733 if (tmp_fh.fh_dentry == fh->fh_dentry) { 734 fh_put(&tmp_fh); 735 return nfserr_noent; 736 } 737 fh_put(&tmp_fh); 738 return nfsd_lookup(rqstp, fh, "..", 2, fh); 739 } 740 741 static __be32 742 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 743 void *arg) 744 { 745 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 746 } 747 748 static __be32 749 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 750 struct nfsd4_lookup *lookup) 751 { 752 return nfsd_lookup(rqstp, &cstate->current_fh, 753 lookup->lo_name, lookup->lo_len, 754 &cstate->current_fh); 755 } 756 757 static __be32 758 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 759 struct nfsd4_read *read) 760 { 761 __be32 status; 762 763 /* no need to check permission - this will be done in nfsd_read() */ 764 765 read->rd_filp = NULL; 766 if (read->rd_offset >= OFFSET_MAX) 767 return nfserr_inval; 768 769 /* 770 * If we do a zero copy read, then a client will see read data 771 * that reflects the state of the file *after* performing the 772 * following compound. 773 * 774 * To ensure proper ordering, we therefore turn off zero copy if 775 * the client wants us to do more in this compound: 776 */ 777 if (!nfsd4_last_compound_op(rqstp)) 778 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 779 780 /* check stateid */ 781 if ((status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 782 cstate, &read->rd_stateid, 783 RD_STATE, &read->rd_filp))) { 784 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 785 goto out; 786 } 787 status = nfs_ok; 788 out: 789 read->rd_rqstp = rqstp; 790 read->rd_fhp = &cstate->current_fh; 791 return status; 792 } 793 794 static __be32 795 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 796 struct nfsd4_readdir *readdir) 797 { 798 u64 cookie = readdir->rd_cookie; 799 static const nfs4_verifier zeroverf; 800 801 /* no need to check permission - this will be done in nfsd_readdir() */ 802 803 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 804 return nfserr_inval; 805 806 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 807 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 808 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 809 810 if ((cookie == 1) || (cookie == 2) || 811 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 812 return nfserr_bad_cookie; 813 814 readdir->rd_rqstp = rqstp; 815 readdir->rd_fhp = &cstate->current_fh; 816 return nfs_ok; 817 } 818 819 static __be32 820 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 821 struct nfsd4_readlink *readlink) 822 { 823 readlink->rl_rqstp = rqstp; 824 readlink->rl_fhp = &cstate->current_fh; 825 return nfs_ok; 826 } 827 828 static __be32 829 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 830 struct nfsd4_remove *remove) 831 { 832 __be32 status; 833 834 if (locks_in_grace(SVC_NET(rqstp))) 835 return nfserr_grace; 836 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 837 remove->rm_name, remove->rm_namelen); 838 if (!status) { 839 fh_unlock(&cstate->current_fh); 840 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 841 } 842 return status; 843 } 844 845 static __be32 846 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 847 struct nfsd4_rename *rename) 848 { 849 __be32 status = nfserr_nofilehandle; 850 851 if (!cstate->save_fh.fh_dentry) 852 return status; 853 if (locks_in_grace(SVC_NET(rqstp)) && 854 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 855 return nfserr_grace; 856 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 857 rename->rn_snamelen, &cstate->current_fh, 858 rename->rn_tname, rename->rn_tnamelen); 859 if (status) 860 return status; 861 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 862 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 863 return nfs_ok; 864 } 865 866 static __be32 867 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 868 struct nfsd4_secinfo *secinfo) 869 { 870 struct svc_fh resfh; 871 struct svc_export *exp; 872 struct dentry *dentry; 873 __be32 err; 874 875 fh_init(&resfh, NFS4_FHSIZE); 876 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 877 if (err) 878 return err; 879 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 880 secinfo->si_name, secinfo->si_namelen, 881 &exp, &dentry); 882 if (err) 883 return err; 884 if (dentry->d_inode == NULL) { 885 exp_put(exp); 886 err = nfserr_noent; 887 } else 888 secinfo->si_exp = exp; 889 dput(dentry); 890 if (cstate->minorversion) 891 /* See rfc 5661 section 2.6.3.1.1.8 */ 892 fh_put(&cstate->current_fh); 893 return err; 894 } 895 896 static __be32 897 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 898 struct nfsd4_secinfo_no_name *sin) 899 { 900 __be32 err; 901 902 switch (sin->sin_style) { 903 case NFS4_SECINFO_STYLE4_CURRENT_FH: 904 break; 905 case NFS4_SECINFO_STYLE4_PARENT: 906 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 907 if (err) 908 return err; 909 break; 910 default: 911 return nfserr_inval; 912 } 913 914 sin->sin_exp = exp_get(cstate->current_fh.fh_export); 915 fh_put(&cstate->current_fh); 916 return nfs_ok; 917 } 918 919 static __be32 920 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 921 struct nfsd4_setattr *setattr) 922 { 923 __be32 status = nfs_ok; 924 int err; 925 926 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 927 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 928 &setattr->sa_stateid, WR_STATE, NULL); 929 if (status) { 930 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 931 return status; 932 } 933 } 934 err = fh_want_write(&cstate->current_fh); 935 if (err) 936 return nfserrno(err); 937 status = nfs_ok; 938 939 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 940 nfsd_attrmask); 941 if (status) 942 goto out; 943 944 if (setattr->sa_acl != NULL) 945 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 946 setattr->sa_acl); 947 if (status) 948 goto out; 949 if (setattr->sa_label.len) 950 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 951 &setattr->sa_label); 952 if (status) 953 goto out; 954 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 955 0, (time_t)0); 956 out: 957 fh_drop_write(&cstate->current_fh); 958 return status; 959 } 960 961 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 962 { 963 int i = 1; 964 int buflen = write->wr_buflen; 965 966 vec[0].iov_base = write->wr_head.iov_base; 967 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 968 buflen -= vec[0].iov_len; 969 970 while (buflen) { 971 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 972 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 973 buflen -= vec[i].iov_len; 974 i++; 975 } 976 return i; 977 } 978 979 static __be32 980 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 981 struct nfsd4_write *write) 982 { 983 stateid_t *stateid = &write->wr_stateid; 984 struct file *filp = NULL; 985 __be32 status = nfs_ok; 986 unsigned long cnt; 987 int nvecs; 988 989 /* no need to check permission - this will be done in nfsd_write() */ 990 991 if (write->wr_offset >= OFFSET_MAX) 992 return nfserr_inval; 993 994 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), 995 cstate, stateid, WR_STATE, &filp); 996 if (status) { 997 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 998 return status; 999 } 1000 1001 cnt = write->wr_buflen; 1002 write->wr_how_written = write->wr_stable_how; 1003 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 1004 1005 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1006 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1007 1008 status = nfsd_write(rqstp, &cstate->current_fh, filp, 1009 write->wr_offset, rqstp->rq_vec, nvecs, 1010 &cnt, &write->wr_how_written); 1011 if (filp) 1012 fput(filp); 1013 1014 write->wr_bytes_written = cnt; 1015 1016 return status; 1017 } 1018 1019 static __be32 1020 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1021 struct nfsd4_fallocate *fallocate, int flags) 1022 { 1023 __be32 status = nfserr_notsupp; 1024 struct file *file; 1025 1026 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 1027 &fallocate->falloc_stateid, 1028 WR_STATE, &file); 1029 if (status != nfs_ok) { 1030 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1031 return status; 1032 } 1033 1034 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file, 1035 fallocate->falloc_offset, 1036 fallocate->falloc_length, 1037 flags); 1038 fput(file); 1039 return status; 1040 } 1041 1042 static __be32 1043 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1044 struct nfsd4_fallocate *fallocate) 1045 { 1046 return nfsd4_fallocate(rqstp, cstate, fallocate, 0); 1047 } 1048 1049 static __be32 1050 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1051 struct nfsd4_fallocate *fallocate) 1052 { 1053 return nfsd4_fallocate(rqstp, cstate, fallocate, 1054 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1055 } 1056 1057 static __be32 1058 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1059 struct nfsd4_seek *seek) 1060 { 1061 int whence; 1062 __be32 status; 1063 struct file *file; 1064 1065 status = nfs4_preprocess_stateid_op(SVC_NET(rqstp), cstate, 1066 &seek->seek_stateid, 1067 RD_STATE, &file); 1068 if (status) { 1069 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1070 return status; 1071 } 1072 1073 switch (seek->seek_whence) { 1074 case NFS4_CONTENT_DATA: 1075 whence = SEEK_DATA; 1076 break; 1077 case NFS4_CONTENT_HOLE: 1078 whence = SEEK_HOLE; 1079 break; 1080 default: 1081 status = nfserr_union_notsupp; 1082 goto out; 1083 } 1084 1085 /* 1086 * Note: This call does change file->f_pos, but nothing in NFSD 1087 * should ever file->f_pos. 1088 */ 1089 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); 1090 if (seek->seek_pos < 0) 1091 status = nfserrno(seek->seek_pos); 1092 else if (seek->seek_pos >= i_size_read(file_inode(file))) 1093 seek->seek_eof = true; 1094 1095 out: 1096 fput(file); 1097 return status; 1098 } 1099 1100 /* This routine never returns NFS_OK! If there are no other errors, it 1101 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1102 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1103 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1104 */ 1105 static __be32 1106 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1107 struct nfsd4_verify *verify) 1108 { 1109 __be32 *buf, *p; 1110 int count; 1111 __be32 status; 1112 1113 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1114 if (status) 1115 return status; 1116 1117 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1118 if (status) 1119 return status; 1120 1121 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1122 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1123 return nfserr_inval; 1124 if (verify->ve_attrlen & 3) 1125 return nfserr_inval; 1126 1127 /* count in words: 1128 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1129 */ 1130 count = 4 + (verify->ve_attrlen >> 2); 1131 buf = kmalloc(count << 2, GFP_KERNEL); 1132 if (!buf) 1133 return nfserr_jukebox; 1134 1135 p = buf; 1136 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1137 cstate->current_fh.fh_export, 1138 cstate->current_fh.fh_dentry, 1139 verify->ve_bmval, 1140 rqstp, 0); 1141 /* 1142 * If nfsd4_encode_fattr() ran out of space, assume that's because 1143 * the attributes are longer (hence different) than those given: 1144 */ 1145 if (status == nfserr_resource) 1146 status = nfserr_not_same; 1147 if (status) 1148 goto out_kfree; 1149 1150 /* skip bitmap */ 1151 p = buf + 1 + ntohl(buf[0]); 1152 status = nfserr_not_same; 1153 if (ntohl(*p++) != verify->ve_attrlen) 1154 goto out_kfree; 1155 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1156 status = nfserr_same; 1157 1158 out_kfree: 1159 kfree(buf); 1160 return status; 1161 } 1162 1163 static __be32 1164 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1165 struct nfsd4_verify *verify) 1166 { 1167 __be32 status; 1168 1169 status = _nfsd4_verify(rqstp, cstate, verify); 1170 return status == nfserr_not_same ? nfs_ok : status; 1171 } 1172 1173 static __be32 1174 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1175 struct nfsd4_verify *verify) 1176 { 1177 __be32 status; 1178 1179 status = _nfsd4_verify(rqstp, cstate, verify); 1180 return status == nfserr_same ? nfs_ok : status; 1181 } 1182 1183 #ifdef CONFIG_NFSD_PNFS 1184 static const struct nfsd4_layout_ops * 1185 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1186 { 1187 if (!exp->ex_layout_type) { 1188 dprintk("%s: export does not support pNFS\n", __func__); 1189 return NULL; 1190 } 1191 1192 if (exp->ex_layout_type != layout_type) { 1193 dprintk("%s: layout type %d not supported\n", 1194 __func__, layout_type); 1195 return NULL; 1196 } 1197 1198 return nfsd4_layout_ops[layout_type]; 1199 } 1200 1201 static __be32 1202 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1203 struct nfsd4_compound_state *cstate, 1204 struct nfsd4_getdeviceinfo *gdp) 1205 { 1206 const struct nfsd4_layout_ops *ops; 1207 struct nfsd4_deviceid_map *map; 1208 struct svc_export *exp; 1209 __be32 nfserr; 1210 1211 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1212 __func__, 1213 gdp->gd_layout_type, 1214 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1215 gdp->gd_maxcount); 1216 1217 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1218 if (!map) { 1219 dprintk("%s: couldn't find device ID to export mapping!\n", 1220 __func__); 1221 return nfserr_noent; 1222 } 1223 1224 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1225 if (IS_ERR(exp)) { 1226 dprintk("%s: could not find device id\n", __func__); 1227 return nfserr_noent; 1228 } 1229 1230 nfserr = nfserr_layoutunavailable; 1231 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1232 if (!ops) 1233 goto out; 1234 1235 nfserr = nfs_ok; 1236 if (gdp->gd_maxcount != 0) 1237 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, gdp); 1238 1239 gdp->gd_notify_types &= ops->notify_types; 1240 out: 1241 exp_put(exp); 1242 return nfserr; 1243 } 1244 1245 static __be32 1246 nfsd4_layoutget(struct svc_rqst *rqstp, 1247 struct nfsd4_compound_state *cstate, 1248 struct nfsd4_layoutget *lgp) 1249 { 1250 struct svc_fh *current_fh = &cstate->current_fh; 1251 const struct nfsd4_layout_ops *ops; 1252 struct nfs4_layout_stateid *ls; 1253 __be32 nfserr; 1254 int accmode; 1255 1256 switch (lgp->lg_seg.iomode) { 1257 case IOMODE_READ: 1258 accmode = NFSD_MAY_READ; 1259 break; 1260 case IOMODE_RW: 1261 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE; 1262 break; 1263 default: 1264 dprintk("%s: invalid iomode %d\n", 1265 __func__, lgp->lg_seg.iomode); 1266 nfserr = nfserr_badiomode; 1267 goto out; 1268 } 1269 1270 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1271 if (nfserr) 1272 goto out; 1273 1274 nfserr = nfserr_layoutunavailable; 1275 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1276 if (!ops) 1277 goto out; 1278 1279 /* 1280 * Verify minlength and range as per RFC5661: 1281 * o If loga_length is less than loga_minlength, 1282 * the metadata server MUST return NFS4ERR_INVAL. 1283 * o If the sum of loga_offset and loga_minlength exceeds 1284 * NFS4_UINT64_MAX, and loga_minlength is not 1285 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1286 * o If the sum of loga_offset and loga_length exceeds 1287 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1288 * the error NFS4ERR_INVAL MUST result. 1289 */ 1290 nfserr = nfserr_inval; 1291 if (lgp->lg_seg.length < lgp->lg_minlength || 1292 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1293 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1294 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1295 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1296 goto out; 1297 if (lgp->lg_seg.length == 0) 1298 goto out; 1299 1300 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1301 true, lgp->lg_layout_type, &ls); 1302 if (nfserr) { 1303 trace_layout_get_lookup_fail(&lgp->lg_sid); 1304 goto out; 1305 } 1306 1307 nfserr = nfserr_recallconflict; 1308 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1309 goto out_put_stid; 1310 1311 nfserr = ops->proc_layoutget(current_fh->fh_dentry->d_inode, 1312 current_fh, lgp); 1313 if (nfserr) 1314 goto out_put_stid; 1315 1316 nfserr = nfsd4_insert_layout(lgp, ls); 1317 1318 out_put_stid: 1319 nfs4_put_stid(&ls->ls_stid); 1320 out: 1321 return nfserr; 1322 } 1323 1324 static __be32 1325 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1326 struct nfsd4_compound_state *cstate, 1327 struct nfsd4_layoutcommit *lcp) 1328 { 1329 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1330 struct svc_fh *current_fh = &cstate->current_fh; 1331 const struct nfsd4_layout_ops *ops; 1332 loff_t new_size = lcp->lc_last_wr + 1; 1333 struct inode *inode; 1334 struct nfs4_layout_stateid *ls; 1335 __be32 nfserr; 1336 1337 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 1338 if (nfserr) 1339 goto out; 1340 1341 nfserr = nfserr_layoutunavailable; 1342 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 1343 if (!ops) 1344 goto out; 1345 inode = current_fh->fh_dentry->d_inode; 1346 1347 nfserr = nfserr_inval; 1348 if (new_size <= seg->offset) { 1349 dprintk("pnfsd: last write before layout segment\n"); 1350 goto out; 1351 } 1352 if (new_size > seg->offset + seg->length) { 1353 dprintk("pnfsd: last write beyond layout segment\n"); 1354 goto out; 1355 } 1356 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 1357 dprintk("pnfsd: layoutcommit beyond EOF\n"); 1358 goto out; 1359 } 1360 1361 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 1362 false, lcp->lc_layout_type, 1363 &ls); 1364 if (nfserr) { 1365 trace_layout_commit_lookup_fail(&lcp->lc_sid); 1366 /* fixup error code as per RFC5661 */ 1367 if (nfserr == nfserr_bad_stateid) 1368 nfserr = nfserr_badlayout; 1369 goto out; 1370 } 1371 1372 nfserr = ops->proc_layoutcommit(inode, lcp); 1373 if (nfserr) 1374 goto out_put_stid; 1375 1376 if (new_size > i_size_read(inode)) { 1377 lcp->lc_size_chg = 1; 1378 lcp->lc_newsize = new_size; 1379 } else { 1380 lcp->lc_size_chg = 0; 1381 } 1382 1383 out_put_stid: 1384 nfs4_put_stid(&ls->ls_stid); 1385 out: 1386 return nfserr; 1387 } 1388 1389 static __be32 1390 nfsd4_layoutreturn(struct svc_rqst *rqstp, 1391 struct nfsd4_compound_state *cstate, 1392 struct nfsd4_layoutreturn *lrp) 1393 { 1394 struct svc_fh *current_fh = &cstate->current_fh; 1395 __be32 nfserr; 1396 1397 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 1398 if (nfserr) 1399 goto out; 1400 1401 nfserr = nfserr_layoutunavailable; 1402 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 1403 goto out; 1404 1405 switch (lrp->lr_seg.iomode) { 1406 case IOMODE_READ: 1407 case IOMODE_RW: 1408 case IOMODE_ANY: 1409 break; 1410 default: 1411 dprintk("%s: invalid iomode %d\n", __func__, 1412 lrp->lr_seg.iomode); 1413 nfserr = nfserr_inval; 1414 goto out; 1415 } 1416 1417 switch (lrp->lr_return_type) { 1418 case RETURN_FILE: 1419 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 1420 break; 1421 case RETURN_FSID: 1422 case RETURN_ALL: 1423 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 1424 break; 1425 default: 1426 dprintk("%s: invalid return_type %d\n", __func__, 1427 lrp->lr_return_type); 1428 nfserr = nfserr_inval; 1429 break; 1430 } 1431 out: 1432 return nfserr; 1433 } 1434 #endif /* CONFIG_NFSD_PNFS */ 1435 1436 /* 1437 * NULL call. 1438 */ 1439 static __be32 1440 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1441 { 1442 return nfs_ok; 1443 } 1444 1445 static inline void nfsd4_increment_op_stats(u32 opnum) 1446 { 1447 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1448 nfsdstats.nfs4_opcount[opnum]++; 1449 } 1450 1451 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1452 void *); 1453 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1454 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1455 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1456 1457 enum nfsd4_op_flags { 1458 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1459 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1460 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1461 /* For rfc 5661 section 2.6.3.1.1: */ 1462 OP_HANDLES_WRONGSEC = 1 << 3, 1463 OP_IS_PUTFH_LIKE = 1 << 4, 1464 /* 1465 * These are the ops whose result size we estimate before 1466 * encoding, to avoid performing an op then not being able to 1467 * respond or cache a response. This includes writes and setattrs 1468 * as well as the operations usually called "nonidempotent": 1469 */ 1470 OP_MODIFIES_SOMETHING = 1 << 5, 1471 /* 1472 * Cache compounds containing these ops in the xid-based drc: 1473 * We use the DRC for compounds containing non-idempotent 1474 * operations, *except* those that are 4.1-specific (since 1475 * sessions provide their own EOS), and except for stateful 1476 * operations other than setclientid and setclientid_confirm 1477 * (since sequence numbers provide EOS for open, lock, etc in 1478 * the v4.0 case). 1479 */ 1480 OP_CACHEME = 1 << 6, 1481 /* 1482 * These are ops which clear current state id. 1483 */ 1484 OP_CLEAR_STATEID = 1 << 7, 1485 }; 1486 1487 struct nfsd4_operation { 1488 nfsd4op_func op_func; 1489 u32 op_flags; 1490 char *op_name; 1491 /* Try to get response size before operation */ 1492 nfsd4op_rsize op_rsize_bop; 1493 stateid_getter op_get_currentstateid; 1494 stateid_setter op_set_currentstateid; 1495 }; 1496 1497 static struct nfsd4_operation nfsd4_ops[]; 1498 1499 static const char *nfsd4_op_name(unsigned opnum); 1500 1501 /* 1502 * Enforce NFSv4.1 COMPOUND ordering rules: 1503 * 1504 * Also note, enforced elsewhere: 1505 * - SEQUENCE other than as first op results in 1506 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1507 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1508 * (Enforced in nfsd4_bind_conn_to_session().) 1509 * - DESTROY_SESSION must be the final operation in a compound, if 1510 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1511 * (Enforced in nfsd4_destroy_session().) 1512 */ 1513 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1514 { 1515 struct nfsd4_op *op = &args->ops[0]; 1516 1517 /* These ordering requirements don't apply to NFSv4.0: */ 1518 if (args->minorversion == 0) 1519 return nfs_ok; 1520 /* This is weird, but OK, not our problem: */ 1521 if (args->opcnt == 0) 1522 return nfs_ok; 1523 if (op->status == nfserr_op_illegal) 1524 return nfs_ok; 1525 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1526 return nfserr_op_not_in_session; 1527 if (op->opnum == OP_SEQUENCE) 1528 return nfs_ok; 1529 if (args->opcnt != 1) 1530 return nfserr_not_only_op; 1531 return nfs_ok; 1532 } 1533 1534 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1535 { 1536 return &nfsd4_ops[op->opnum]; 1537 } 1538 1539 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1540 { 1541 if (op->opnum == OP_ILLEGAL) 1542 return false; 1543 return OPDESC(op)->op_flags & OP_CACHEME; 1544 } 1545 1546 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1547 { 1548 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1549 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1550 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1551 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1552 struct nfsd4_operation *thisd; 1553 struct nfsd4_operation *nextd; 1554 1555 thisd = OPDESC(this); 1556 /* 1557 * Most ops check wronsec on our own; only the putfh-like ops 1558 * have special rules. 1559 */ 1560 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1561 return false; 1562 /* 1563 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1564 * put-filehandle operation if we're not going to use the 1565 * result: 1566 */ 1567 if (argp->opcnt == resp->opcnt) 1568 return false; 1569 if (next->opnum == OP_ILLEGAL) 1570 return false; 1571 nextd = OPDESC(next); 1572 /* 1573 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1574 * errors themselves as necessary; others should check for them 1575 * now: 1576 */ 1577 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1578 } 1579 1580 static void svcxdr_init_encode(struct svc_rqst *rqstp, 1581 struct nfsd4_compoundres *resp) 1582 { 1583 struct xdr_stream *xdr = &resp->xdr; 1584 struct xdr_buf *buf = &rqstp->rq_res; 1585 struct kvec *head = buf->head; 1586 1587 xdr->buf = buf; 1588 xdr->iov = head; 1589 xdr->p = head->iov_base + head->iov_len; 1590 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1591 /* Tail and page_len should be zero at this point: */ 1592 buf->len = buf->head[0].iov_len; 1593 xdr->scratch.iov_len = 0; 1594 xdr->page_ptr = buf->pages - 1; 1595 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1596 - rqstp->rq_auth_slack; 1597 } 1598 1599 /* 1600 * COMPOUND call. 1601 */ 1602 static __be32 1603 nfsd4_proc_compound(struct svc_rqst *rqstp, 1604 struct nfsd4_compoundargs *args, 1605 struct nfsd4_compoundres *resp) 1606 { 1607 struct nfsd4_op *op; 1608 struct nfsd4_operation *opdesc; 1609 struct nfsd4_compound_state *cstate = &resp->cstate; 1610 struct svc_fh *current_fh = &cstate->current_fh; 1611 struct svc_fh *save_fh = &cstate->save_fh; 1612 __be32 status; 1613 1614 svcxdr_init_encode(rqstp, resp); 1615 resp->tagp = resp->xdr.p; 1616 /* reserve space for: taglen, tag, and opcnt */ 1617 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1618 resp->taglen = args->taglen; 1619 resp->tag = args->tag; 1620 resp->rqstp = rqstp; 1621 cstate->minorversion = args->minorversion; 1622 fh_init(current_fh, NFS4_FHSIZE); 1623 fh_init(save_fh, NFS4_FHSIZE); 1624 /* 1625 * Don't use the deferral mechanism for NFSv4; compounds make it 1626 * too hard to avoid non-idempotency problems. 1627 */ 1628 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1629 1630 /* 1631 * According to RFC3010, this takes precedence over all other errors. 1632 */ 1633 status = nfserr_minor_vers_mismatch; 1634 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1635 goto out; 1636 1637 status = nfs41_check_op_ordering(args); 1638 if (status) { 1639 op = &args->ops[0]; 1640 op->status = status; 1641 goto encode_op; 1642 } 1643 1644 while (!status && resp->opcnt < args->opcnt) { 1645 op = &args->ops[resp->opcnt++]; 1646 1647 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1648 resp->opcnt, args->opcnt, op->opnum, 1649 nfsd4_op_name(op->opnum)); 1650 /* 1651 * The XDR decode routines may have pre-set op->status; 1652 * for example, if there is a miscellaneous XDR error 1653 * it will be set to nfserr_bad_xdr. 1654 */ 1655 if (op->status) { 1656 if (op->opnum == OP_OPEN) 1657 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1658 goto encode_op; 1659 } 1660 1661 opdesc = OPDESC(op); 1662 1663 if (!current_fh->fh_dentry) { 1664 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1665 op->status = nfserr_nofilehandle; 1666 goto encode_op; 1667 } 1668 } else if (current_fh->fh_export->ex_fslocs.migrated && 1669 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1670 op->status = nfserr_moved; 1671 goto encode_op; 1672 } 1673 1674 fh_clear_wcc(current_fh); 1675 1676 /* If op is non-idempotent */ 1677 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1678 /* 1679 * Don't execute this op if we couldn't encode a 1680 * succesful reply: 1681 */ 1682 u32 plen = opdesc->op_rsize_bop(rqstp, op); 1683 /* 1684 * Plus if there's another operation, make sure 1685 * we'll have space to at least encode an error: 1686 */ 1687 if (resp->opcnt < args->opcnt) 1688 plen += COMPOUND_ERR_SLACK_SPACE; 1689 op->status = nfsd4_check_resp_size(resp, plen); 1690 } 1691 1692 if (op->status) 1693 goto encode_op; 1694 1695 if (opdesc->op_get_currentstateid) 1696 opdesc->op_get_currentstateid(cstate, &op->u); 1697 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1698 1699 if (!op->status) { 1700 if (opdesc->op_set_currentstateid) 1701 opdesc->op_set_currentstateid(cstate, &op->u); 1702 1703 if (opdesc->op_flags & OP_CLEAR_STATEID) 1704 clear_current_stateid(cstate); 1705 1706 if (need_wrongsec_check(rqstp)) 1707 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 1708 } 1709 1710 encode_op: 1711 /* Only from SEQUENCE */ 1712 if (cstate->status == nfserr_replay_cache) { 1713 dprintk("%s NFS4.1 replay from cache\n", __func__); 1714 status = op->status; 1715 goto out; 1716 } 1717 if (op->status == nfserr_replay_me) { 1718 op->replay = &cstate->replay_owner->so_replay; 1719 nfsd4_encode_replay(&resp->xdr, op); 1720 status = op->status = op->replay->rp_status; 1721 } else { 1722 nfsd4_encode_operation(resp, op); 1723 status = op->status; 1724 } 1725 1726 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1727 args->ops, args->opcnt, resp->opcnt, op->opnum, 1728 be32_to_cpu(status)); 1729 1730 nfsd4_cstate_clear_replay(cstate); 1731 /* XXX Ugh, we need to get rid of this kind of special case: */ 1732 if (op->opnum == OP_READ && op->u.read.rd_filp) 1733 fput(op->u.read.rd_filp); 1734 1735 nfsd4_increment_op_stats(op->opnum); 1736 } 1737 1738 cstate->status = status; 1739 fh_put(current_fh); 1740 fh_put(save_fh); 1741 BUG_ON(cstate->replay_owner); 1742 out: 1743 /* Reset deferral mechanism for RPC deferrals */ 1744 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1745 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1746 return status; 1747 } 1748 1749 #define op_encode_hdr_size (2) 1750 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1751 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1752 #define op_encode_change_info_maxsz (5) 1753 #define nfs4_fattr_bitmap_maxsz (4) 1754 1755 /* We'll fall back on returning no lockowner if run out of space: */ 1756 #define op_encode_lockowner_maxsz (0) 1757 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1758 1759 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1760 1761 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1762 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1763 op_encode_ace_maxsz) 1764 1765 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1766 1767 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1768 { 1769 return (op_encode_hdr_size) * sizeof(__be32); 1770 } 1771 1772 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1773 { 1774 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1775 } 1776 1777 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1778 { 1779 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1780 } 1781 1782 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1783 { 1784 return (op_encode_hdr_size + op_encode_change_info_maxsz 1785 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1786 } 1787 1788 /* 1789 * Note since this is an idempotent operation we won't insist on failing 1790 * the op prematurely if the estimate is too large. We may turn off splice 1791 * reads unnecessarily. 1792 */ 1793 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1794 struct nfsd4_op *op) 1795 { 1796 u32 *bmap = op->u.getattr.ga_bmval; 1797 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1798 u32 ret = 0; 1799 1800 if (bmap0 & FATTR4_WORD0_ACL) 1801 return svc_max_payload(rqstp); 1802 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1803 return svc_max_payload(rqstp); 1804 1805 if (bmap1 & FATTR4_WORD1_OWNER) { 1806 ret += IDMAP_NAMESZ + 4; 1807 bmap1 &= ~FATTR4_WORD1_OWNER; 1808 } 1809 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1810 ret += IDMAP_NAMESZ + 4; 1811 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1812 } 1813 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1814 ret += NFS4_FHSIZE + 4; 1815 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1816 } 1817 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1818 ret += NFSD4_MAX_SEC_LABEL_LEN + 12; 1819 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1820 } 1821 /* 1822 * Largest of remaining attributes are 16 bytes (e.g., 1823 * supported_attributes) 1824 */ 1825 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1826 /* bitmask, length */ 1827 ret += 20; 1828 return ret; 1829 } 1830 1831 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1832 { 1833 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1834 * sizeof(__be32); 1835 } 1836 1837 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1838 { 1839 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1840 * sizeof(__be32); 1841 } 1842 1843 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1844 { 1845 return (op_encode_hdr_size + op_encode_stateid_maxsz 1846 + op_encode_change_info_maxsz + 1 1847 + nfs4_fattr_bitmap_maxsz 1848 + op_encode_delegation_maxsz) * sizeof(__be32); 1849 } 1850 1851 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1852 { 1853 u32 maxcount = 0, rlen = 0; 1854 1855 maxcount = svc_max_payload(rqstp); 1856 rlen = min(op->u.read.rd_length, maxcount); 1857 1858 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1859 } 1860 1861 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1862 { 1863 u32 maxcount = 0, rlen = 0; 1864 1865 maxcount = svc_max_payload(rqstp); 1866 rlen = min(op->u.readdir.rd_maxcount, maxcount); 1867 1868 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1869 XDR_QUADLEN(rlen)) * sizeof(__be32); 1870 } 1871 1872 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1873 { 1874 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1875 * sizeof(__be32); 1876 } 1877 1878 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1879 { 1880 return (op_encode_hdr_size + op_encode_change_info_maxsz 1881 + op_encode_change_info_maxsz) * sizeof(__be32); 1882 } 1883 1884 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1885 struct nfsd4_op *op) 1886 { 1887 return (op_encode_hdr_size 1888 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 1889 } 1890 1891 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1892 { 1893 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1894 } 1895 1896 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1897 { 1898 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1899 sizeof(__be32); 1900 } 1901 1902 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1903 { 1904 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 1905 } 1906 1907 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1908 { 1909 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1910 1 + 1 + /* eir_flags, spr_how */\ 1911 4 + /* spo_must_enforce & _allow with bitmap */\ 1912 2 + /*eir_server_owner.so_minor_id */\ 1913 /* eir_server_owner.so_major_id<> */\ 1914 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1915 /* eir_server_scope<> */\ 1916 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1917 1 + /* eir_server_impl_id array length */\ 1918 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1919 } 1920 1921 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1922 { 1923 return (op_encode_hdr_size + \ 1924 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1925 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1926 } 1927 1928 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1929 { 1930 return (op_encode_hdr_size + \ 1931 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1932 2 + /* csr_sequence, csr_flags */\ 1933 op_encode_channel_attrs_maxsz + \ 1934 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1935 } 1936 1937 #ifdef CONFIG_NFSD_PNFS 1938 /* 1939 * At this stage we don't really know what layout driver will handle the request, 1940 * so we need to define an arbitrary upper bound here. 1941 */ 1942 #define MAX_LAYOUT_SIZE 128 1943 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1944 { 1945 return (op_encode_hdr_size + 1946 1 /* logr_return_on_close */ + 1947 op_encode_stateid_maxsz + 1948 1 /* nr of layouts */ + 1949 MAX_LAYOUT_SIZE) * sizeof(__be32); 1950 } 1951 1952 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1953 { 1954 return (op_encode_hdr_size + 1955 1 /* locr_newsize */ + 1956 2 /* ns_size */) * sizeof(__be32); 1957 } 1958 1959 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1960 { 1961 return (op_encode_hdr_size + 1962 1 /* lrs_stateid */ + 1963 op_encode_stateid_maxsz) * sizeof(__be32); 1964 } 1965 #endif /* CONFIG_NFSD_PNFS */ 1966 1967 static struct nfsd4_operation nfsd4_ops[] = { 1968 [OP_ACCESS] = { 1969 .op_func = (nfsd4op_func)nfsd4_access, 1970 .op_name = "OP_ACCESS", 1971 }, 1972 [OP_CLOSE] = { 1973 .op_func = (nfsd4op_func)nfsd4_close, 1974 .op_flags = OP_MODIFIES_SOMETHING, 1975 .op_name = "OP_CLOSE", 1976 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1977 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 1978 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 1979 }, 1980 [OP_COMMIT] = { 1981 .op_func = (nfsd4op_func)nfsd4_commit, 1982 .op_flags = OP_MODIFIES_SOMETHING, 1983 .op_name = "OP_COMMIT", 1984 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 1985 }, 1986 [OP_CREATE] = { 1987 .op_func = (nfsd4op_func)nfsd4_create, 1988 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 1989 .op_name = "OP_CREATE", 1990 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 1991 }, 1992 [OP_DELEGRETURN] = { 1993 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1994 .op_flags = OP_MODIFIES_SOMETHING, 1995 .op_name = "OP_DELEGRETURN", 1996 .op_rsize_bop = nfsd4_only_status_rsize, 1997 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 1998 }, 1999 [OP_GETATTR] = { 2000 .op_func = (nfsd4op_func)nfsd4_getattr, 2001 .op_flags = ALLOWED_ON_ABSENT_FS, 2002 .op_rsize_bop = nfsd4_getattr_rsize, 2003 .op_name = "OP_GETATTR", 2004 }, 2005 [OP_GETFH] = { 2006 .op_func = (nfsd4op_func)nfsd4_getfh, 2007 .op_name = "OP_GETFH", 2008 }, 2009 [OP_LINK] = { 2010 .op_func = (nfsd4op_func)nfsd4_link, 2011 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2012 | OP_CACHEME, 2013 .op_name = "OP_LINK", 2014 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 2015 }, 2016 [OP_LOCK] = { 2017 .op_func = (nfsd4op_func)nfsd4_lock, 2018 .op_flags = OP_MODIFIES_SOMETHING, 2019 .op_name = "OP_LOCK", 2020 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 2021 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 2022 }, 2023 [OP_LOCKT] = { 2024 .op_func = (nfsd4op_func)nfsd4_lockt, 2025 .op_name = "OP_LOCKT", 2026 }, 2027 [OP_LOCKU] = { 2028 .op_func = (nfsd4op_func)nfsd4_locku, 2029 .op_flags = OP_MODIFIES_SOMETHING, 2030 .op_name = "OP_LOCKU", 2031 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2032 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 2033 }, 2034 [OP_LOOKUP] = { 2035 .op_func = (nfsd4op_func)nfsd4_lookup, 2036 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2037 .op_name = "OP_LOOKUP", 2038 }, 2039 [OP_LOOKUPP] = { 2040 .op_func = (nfsd4op_func)nfsd4_lookupp, 2041 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2042 .op_name = "OP_LOOKUPP", 2043 }, 2044 [OP_NVERIFY] = { 2045 .op_func = (nfsd4op_func)nfsd4_nverify, 2046 .op_name = "OP_NVERIFY", 2047 }, 2048 [OP_OPEN] = { 2049 .op_func = (nfsd4op_func)nfsd4_open, 2050 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2051 .op_name = "OP_OPEN", 2052 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 2053 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 2054 }, 2055 [OP_OPEN_CONFIRM] = { 2056 .op_func = (nfsd4op_func)nfsd4_open_confirm, 2057 .op_flags = OP_MODIFIES_SOMETHING, 2058 .op_name = "OP_OPEN_CONFIRM", 2059 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2060 }, 2061 [OP_OPEN_DOWNGRADE] = { 2062 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 2063 .op_flags = OP_MODIFIES_SOMETHING, 2064 .op_name = "OP_OPEN_DOWNGRADE", 2065 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2066 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 2067 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 2068 }, 2069 [OP_PUTFH] = { 2070 .op_func = (nfsd4op_func)nfsd4_putfh, 2071 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2072 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2073 .op_name = "OP_PUTFH", 2074 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2075 }, 2076 [OP_PUTPUBFH] = { 2077 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2078 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2079 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2080 .op_name = "OP_PUTPUBFH", 2081 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2082 }, 2083 [OP_PUTROOTFH] = { 2084 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2085 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2086 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2087 .op_name = "OP_PUTROOTFH", 2088 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2089 }, 2090 [OP_READ] = { 2091 .op_func = (nfsd4op_func)nfsd4_read, 2092 .op_name = "OP_READ", 2093 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 2094 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 2095 }, 2096 [OP_READDIR] = { 2097 .op_func = (nfsd4op_func)nfsd4_readdir, 2098 .op_name = "OP_READDIR", 2099 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 2100 }, 2101 [OP_READLINK] = { 2102 .op_func = (nfsd4op_func)nfsd4_readlink, 2103 .op_name = "OP_READLINK", 2104 }, 2105 [OP_REMOVE] = { 2106 .op_func = (nfsd4op_func)nfsd4_remove, 2107 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2108 .op_name = "OP_REMOVE", 2109 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 2110 }, 2111 [OP_RENAME] = { 2112 .op_func = (nfsd4op_func)nfsd4_rename, 2113 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2114 .op_name = "OP_RENAME", 2115 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 2116 }, 2117 [OP_RENEW] = { 2118 .op_func = (nfsd4op_func)nfsd4_renew, 2119 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2120 | OP_MODIFIES_SOMETHING, 2121 .op_name = "OP_RENEW", 2122 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2123 2124 }, 2125 [OP_RESTOREFH] = { 2126 .op_func = (nfsd4op_func)nfsd4_restorefh, 2127 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2128 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2129 .op_name = "OP_RESTOREFH", 2130 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2131 }, 2132 [OP_SAVEFH] = { 2133 .op_func = (nfsd4op_func)nfsd4_savefh, 2134 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2135 .op_name = "OP_SAVEFH", 2136 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2137 }, 2138 [OP_SECINFO] = { 2139 .op_func = (nfsd4op_func)nfsd4_secinfo, 2140 .op_flags = OP_HANDLES_WRONGSEC, 2141 .op_name = "OP_SECINFO", 2142 }, 2143 [OP_SETATTR] = { 2144 .op_func = (nfsd4op_func)nfsd4_setattr, 2145 .op_name = "OP_SETATTR", 2146 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2147 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 2148 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 2149 }, 2150 [OP_SETCLIENTID] = { 2151 .op_func = (nfsd4op_func)nfsd4_setclientid, 2152 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2153 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2154 .op_name = "OP_SETCLIENTID", 2155 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 2156 }, 2157 [OP_SETCLIENTID_CONFIRM] = { 2158 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 2159 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2160 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2161 .op_name = "OP_SETCLIENTID_CONFIRM", 2162 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2163 }, 2164 [OP_VERIFY] = { 2165 .op_func = (nfsd4op_func)nfsd4_verify, 2166 .op_name = "OP_VERIFY", 2167 }, 2168 [OP_WRITE] = { 2169 .op_func = (nfsd4op_func)nfsd4_write, 2170 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2171 .op_name = "OP_WRITE", 2172 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 2173 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 2174 }, 2175 [OP_RELEASE_LOCKOWNER] = { 2176 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 2177 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2178 | OP_MODIFIES_SOMETHING, 2179 .op_name = "OP_RELEASE_LOCKOWNER", 2180 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2181 }, 2182 2183 /* NFSv4.1 operations */ 2184 [OP_EXCHANGE_ID] = { 2185 .op_func = (nfsd4op_func)nfsd4_exchange_id, 2186 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2187 | OP_MODIFIES_SOMETHING, 2188 .op_name = "OP_EXCHANGE_ID", 2189 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 2190 }, 2191 [OP_BACKCHANNEL_CTL] = { 2192 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 2193 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2194 .op_name = "OP_BACKCHANNEL_CTL", 2195 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2196 }, 2197 [OP_BIND_CONN_TO_SESSION] = { 2198 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 2199 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2200 | OP_MODIFIES_SOMETHING, 2201 .op_name = "OP_BIND_CONN_TO_SESSION", 2202 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 2203 }, 2204 [OP_CREATE_SESSION] = { 2205 .op_func = (nfsd4op_func)nfsd4_create_session, 2206 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2207 | OP_MODIFIES_SOMETHING, 2208 .op_name = "OP_CREATE_SESSION", 2209 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 2210 }, 2211 [OP_DESTROY_SESSION] = { 2212 .op_func = (nfsd4op_func)nfsd4_destroy_session, 2213 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2214 | OP_MODIFIES_SOMETHING, 2215 .op_name = "OP_DESTROY_SESSION", 2216 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2217 }, 2218 [OP_SEQUENCE] = { 2219 .op_func = (nfsd4op_func)nfsd4_sequence, 2220 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 2221 .op_name = "OP_SEQUENCE", 2222 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize, 2223 }, 2224 [OP_DESTROY_CLIENTID] = { 2225 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 2226 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2227 | OP_MODIFIES_SOMETHING, 2228 .op_name = "OP_DESTROY_CLIENTID", 2229 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2230 }, 2231 [OP_RECLAIM_COMPLETE] = { 2232 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 2233 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2234 .op_name = "OP_RECLAIM_COMPLETE", 2235 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2236 }, 2237 [OP_SECINFO_NO_NAME] = { 2238 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 2239 .op_flags = OP_HANDLES_WRONGSEC, 2240 .op_name = "OP_SECINFO_NO_NAME", 2241 }, 2242 [OP_TEST_STATEID] = { 2243 .op_func = (nfsd4op_func)nfsd4_test_stateid, 2244 .op_flags = ALLOWED_WITHOUT_FH, 2245 .op_name = "OP_TEST_STATEID", 2246 }, 2247 [OP_FREE_STATEID] = { 2248 .op_func = (nfsd4op_func)nfsd4_free_stateid, 2249 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2250 .op_name = "OP_FREE_STATEID", 2251 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 2252 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2253 }, 2254 #ifdef CONFIG_NFSD_PNFS 2255 [OP_GETDEVICEINFO] = { 2256 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo, 2257 .op_flags = ALLOWED_WITHOUT_FH, 2258 .op_name = "OP_GETDEVICEINFO", 2259 }, 2260 [OP_LAYOUTGET] = { 2261 .op_func = (nfsd4op_func)nfsd4_layoutget, 2262 .op_flags = OP_MODIFIES_SOMETHING, 2263 .op_name = "OP_LAYOUTGET", 2264 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize, 2265 }, 2266 [OP_LAYOUTCOMMIT] = { 2267 .op_func = (nfsd4op_func)nfsd4_layoutcommit, 2268 .op_flags = OP_MODIFIES_SOMETHING, 2269 .op_name = "OP_LAYOUTCOMMIT", 2270 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize, 2271 }, 2272 [OP_LAYOUTRETURN] = { 2273 .op_func = (nfsd4op_func)nfsd4_layoutreturn, 2274 .op_flags = OP_MODIFIES_SOMETHING, 2275 .op_name = "OP_LAYOUTRETURN", 2276 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize, 2277 }, 2278 #endif /* CONFIG_NFSD_PNFS */ 2279 2280 /* NFSv4.2 operations */ 2281 [OP_ALLOCATE] = { 2282 .op_func = (nfsd4op_func)nfsd4_allocate, 2283 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2284 .op_name = "OP_ALLOCATE", 2285 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 2286 }, 2287 [OP_DEALLOCATE] = { 2288 .op_func = (nfsd4op_func)nfsd4_deallocate, 2289 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2290 .op_name = "OP_DEALLOCATE", 2291 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 2292 }, 2293 [OP_SEEK] = { 2294 .op_func = (nfsd4op_func)nfsd4_seek, 2295 .op_name = "OP_SEEK", 2296 }, 2297 }; 2298 2299 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 2300 { 2301 struct nfsd4_operation *opdesc; 2302 nfsd4op_rsize estimator; 2303 2304 if (op->opnum == OP_ILLEGAL) 2305 return op_encode_hdr_size * sizeof(__be32); 2306 opdesc = OPDESC(op); 2307 estimator = opdesc->op_rsize_bop; 2308 return estimator ? estimator(rqstp, op) : PAGE_SIZE; 2309 } 2310 2311 void warn_on_nonidempotent_op(struct nfsd4_op *op) 2312 { 2313 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 2314 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 2315 op->opnum, nfsd4_op_name(op->opnum)); 2316 WARN_ON_ONCE(1); 2317 } 2318 } 2319 2320 static const char *nfsd4_op_name(unsigned opnum) 2321 { 2322 if (opnum < ARRAY_SIZE(nfsd4_ops)) 2323 return nfsd4_ops[opnum].op_name; 2324 return "unknown_operation"; 2325 } 2326 2327 #define nfsd4_voidres nfsd4_voidargs 2328 struct nfsd4_voidargs { int dummy; }; 2329 2330 static struct svc_procedure nfsd_procedures4[2] = { 2331 [NFSPROC4_NULL] = { 2332 .pc_func = (svc_procfunc) nfsd4_proc_null, 2333 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 2334 .pc_argsize = sizeof(struct nfsd4_voidargs), 2335 .pc_ressize = sizeof(struct nfsd4_voidres), 2336 .pc_cachetype = RC_NOCACHE, 2337 .pc_xdrressize = 1, 2338 }, 2339 [NFSPROC4_COMPOUND] = { 2340 .pc_func = (svc_procfunc) nfsd4_proc_compound, 2341 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 2342 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 2343 .pc_argsize = sizeof(struct nfsd4_compoundargs), 2344 .pc_ressize = sizeof(struct nfsd4_compoundres), 2345 .pc_release = nfsd4_release_compoundargs, 2346 .pc_cachetype = RC_NOCACHE, 2347 .pc_xdrressize = NFSD_BUFSIZE/4, 2348 }, 2349 }; 2350 2351 struct svc_version nfsd_version4 = { 2352 .vs_vers = 4, 2353 .vs_nproc = 2, 2354 .vs_proc = nfsd_procedures4, 2355 .vs_dispatch = nfsd_dispatch, 2356 .vs_xdrsize = NFS4_SVC_XDRSIZE, 2357 .vs_rpcb_optnl = 1, 2358 }; 2359 2360 /* 2361 * Local variables: 2362 * c-basic-offset: 8 2363 * End: 2364 */ 2365