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