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, and rfc 5661 18.16.4 280 * use the returned bitmask to indicate which attributes 281 * we used to store the verifier: 282 */ 283 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0) 284 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS | 285 FATTR4_WORD1_TIME_MODIFY); 286 } else 287 /* 288 * Note this may exit with the parent still locked. 289 * We will hold the lock until nfsd4_open's final 290 * lookup, to prevent renames or unlinks until we've had 291 * a chance to an acquire a delegation if appropriate. 292 */ 293 status = nfsd_lookup(rqstp, current_fh, 294 open->op_fname.data, open->op_fname.len, *resfh); 295 if (status) 296 goto out; 297 status = nfsd_check_obj_isreg(*resfh); 298 if (status) 299 goto out; 300 301 if (is_create_with_attrs(open) && open->op_acl != NULL) 302 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); 303 304 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); 305 accmode = NFSD_MAY_NOP; 306 if (open->op_created || 307 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 308 accmode |= NFSD_MAY_OWNER_OVERRIDE; 309 status = do_open_permission(rqstp, *resfh, open, accmode); 310 set_change_info(&open->op_cinfo, current_fh); 311 out: 312 return status; 313 } 314 315 static __be32 316 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 317 { 318 struct svc_fh *current_fh = &cstate->current_fh; 319 __be32 status; 320 int accmode = 0; 321 322 /* We don't know the target directory, and therefore can not 323 * set the change info 324 */ 325 326 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 327 328 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 329 330 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 331 (open->op_iattr.ia_size == 0); 332 /* 333 * In the delegation case, the client is telling us about an 334 * open that it *already* performed locally, some time ago. We 335 * should let it succeed now if possible. 336 * 337 * In the case of a CLAIM_FH open, on the other hand, the client 338 * may be counting on us to enforce permissions (the Linux 4.1 339 * client uses this for normal opens, for example). 340 */ 341 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 342 accmode = NFSD_MAY_OWNER_OVERRIDE; 343 344 status = do_open_permission(rqstp, current_fh, open, accmode); 345 346 return status; 347 } 348 349 static void 350 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 351 { 352 struct nfsd4_sessionid *sid = 353 (struct nfsd4_sessionid *)session->se_sessionid.data; 354 355 clid->cl_boot = sid->clientid.cl_boot; 356 clid->cl_id = sid->clientid.cl_id; 357 } 358 359 static __be32 360 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 361 struct nfsd4_open *open) 362 { 363 __be32 status; 364 struct svc_fh *resfh = NULL; 365 struct net *net = SVC_NET(rqstp); 366 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 367 368 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 369 (int)open->op_fname.len, open->op_fname.data, 370 open->op_openowner); 371 372 /* This check required by spec. */ 373 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 374 return nfserr_inval; 375 376 open->op_created = 0; 377 /* 378 * RFC5661 18.51.3 379 * Before RECLAIM_COMPLETE done, server should deny new lock 380 */ 381 if (nfsd4_has_session(cstate) && 382 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 383 &cstate->session->se_client->cl_flags) && 384 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 385 return nfserr_grace; 386 387 if (nfsd4_has_session(cstate)) 388 copy_clientid(&open->op_clientid, cstate->session); 389 390 /* check seqid for replay. set nfs4_owner */ 391 status = nfsd4_process_open1(cstate, open, nn); 392 if (status == nfserr_replay_me) { 393 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 394 fh_put(&cstate->current_fh); 395 fh_copy_shallow(&cstate->current_fh.fh_handle, 396 &rp->rp_openfh); 397 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 398 if (status) 399 dprintk("nfsd4_open: replay failed" 400 " restoring previous filehandle\n"); 401 else 402 status = nfserr_replay_me; 403 } 404 if (status) 405 goto out; 406 if (open->op_xdr_error) { 407 status = open->op_xdr_error; 408 goto out; 409 } 410 411 status = nfsd4_check_open_attributes(rqstp, cstate, open); 412 if (status) 413 goto out; 414 415 /* Openowner is now set, so sequence id will get bumped. Now we need 416 * these checks before we do any creates: */ 417 status = nfserr_grace; 418 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 419 goto out; 420 status = nfserr_no_grace; 421 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 422 goto out; 423 424 switch (open->op_claim_type) { 425 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 426 case NFS4_OPEN_CLAIM_NULL: 427 status = do_open_lookup(rqstp, cstate, open, &resfh); 428 if (status) 429 goto out; 430 break; 431 case NFS4_OPEN_CLAIM_PREVIOUS: 432 status = nfs4_check_open_reclaim(&open->op_clientid, 433 cstate, nn); 434 if (status) 435 goto out; 436 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 437 case NFS4_OPEN_CLAIM_FH: 438 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 439 status = do_open_fhandle(rqstp, cstate, open); 440 if (status) 441 goto out; 442 resfh = &cstate->current_fh; 443 break; 444 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 445 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 446 dprintk("NFSD: unsupported OPEN claim type %d\n", 447 open->op_claim_type); 448 status = nfserr_notsupp; 449 goto out; 450 default: 451 dprintk("NFSD: Invalid OPEN claim type %d\n", 452 open->op_claim_type); 453 status = nfserr_inval; 454 goto out; 455 } 456 /* 457 * nfsd4_process_open2() does the actual opening of the file. If 458 * successful, it (1) truncates the file if open->op_truncate was 459 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 460 */ 461 status = nfsd4_process_open2(rqstp, resfh, open); 462 WARN(status && open->op_created, 463 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 464 be32_to_cpu(status)); 465 out: 466 if (resfh && resfh != &cstate->current_fh) { 467 fh_dup2(&cstate->current_fh, resfh); 468 fh_put(resfh); 469 kfree(resfh); 470 } 471 nfsd4_cleanup_open_state(cstate, open); 472 nfsd4_bump_seqid(cstate, status); 473 return status; 474 } 475 476 /* 477 * OPEN is the only seqid-mutating operation whose decoding can fail 478 * with a seqid-mutating error (specifically, decoding of user names in 479 * the attributes). Therefore we have to do some processing to look up 480 * the stateowner so that we can bump the seqid. 481 */ 482 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 483 { 484 struct nfsd4_open *open = (struct nfsd4_open *)&op->u; 485 486 if (!seqid_mutating_err(ntohl(op->status))) 487 return op->status; 488 if (nfsd4_has_session(cstate)) 489 return op->status; 490 open->op_xdr_error = op->status; 491 return nfsd4_open(rqstp, cstate, open); 492 } 493 494 /* 495 * filehandle-manipulating ops. 496 */ 497 static __be32 498 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 499 struct svc_fh **getfh) 500 { 501 if (!cstate->current_fh.fh_dentry) 502 return nfserr_nofilehandle; 503 504 *getfh = &cstate->current_fh; 505 return nfs_ok; 506 } 507 508 static __be32 509 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 510 struct nfsd4_putfh *putfh) 511 { 512 fh_put(&cstate->current_fh); 513 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 514 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 515 putfh->pf_fhlen); 516 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 517 } 518 519 static __be32 520 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 521 void *arg) 522 { 523 __be32 status; 524 525 fh_put(&cstate->current_fh); 526 status = exp_pseudoroot(rqstp, &cstate->current_fh); 527 return status; 528 } 529 530 static __be32 531 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 532 void *arg) 533 { 534 if (!cstate->save_fh.fh_dentry) 535 return nfserr_restorefh; 536 537 fh_dup2(&cstate->current_fh, &cstate->save_fh); 538 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 539 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 540 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 541 } 542 return nfs_ok; 543 } 544 545 static __be32 546 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 547 void *arg) 548 { 549 if (!cstate->current_fh.fh_dentry) 550 return nfserr_nofilehandle; 551 552 fh_dup2(&cstate->save_fh, &cstate->current_fh); 553 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 554 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 555 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 556 } 557 return nfs_ok; 558 } 559 560 /* 561 * misc nfsv4 ops 562 */ 563 static __be32 564 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 565 struct nfsd4_access *access) 566 { 567 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 568 return nfserr_inval; 569 570 access->ac_resp_access = access->ac_req_access; 571 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 572 &access->ac_supported); 573 } 574 575 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 576 { 577 __be32 verf[2]; 578 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 579 580 /* 581 * This is opaque to client, so no need to byte-swap. Use 582 * __force to keep sparse happy 583 */ 584 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec; 585 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec; 586 memcpy(verifier->data, verf, sizeof(verifier->data)); 587 } 588 589 static __be32 590 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 591 struct nfsd4_commit *commit) 592 { 593 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 594 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 595 commit->co_count); 596 } 597 598 static __be32 599 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 600 struct nfsd4_create *create) 601 { 602 struct svc_fh resfh; 603 __be32 status; 604 dev_t rdev; 605 606 fh_init(&resfh, NFS4_FHSIZE); 607 608 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 609 NFSD_MAY_CREATE); 610 if (status) 611 return status; 612 613 status = check_attr_support(rqstp, cstate, create->cr_bmval, 614 nfsd_attrmask); 615 if (status) 616 return status; 617 618 switch (create->cr_type) { 619 case NF4LNK: 620 status = nfsd_symlink(rqstp, &cstate->current_fh, 621 create->cr_name, create->cr_namelen, 622 create->cr_data, &resfh); 623 break; 624 625 case NF4BLK: 626 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 627 if (MAJOR(rdev) != create->cr_specdata1 || 628 MINOR(rdev) != create->cr_specdata2) 629 return nfserr_inval; 630 status = nfsd_create(rqstp, &cstate->current_fh, 631 create->cr_name, create->cr_namelen, 632 &create->cr_iattr, S_IFBLK, rdev, &resfh); 633 break; 634 635 case NF4CHR: 636 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 637 if (MAJOR(rdev) != create->cr_specdata1 || 638 MINOR(rdev) != create->cr_specdata2) 639 return nfserr_inval; 640 status = nfsd_create(rqstp, &cstate->current_fh, 641 create->cr_name, create->cr_namelen, 642 &create->cr_iattr,S_IFCHR, rdev, &resfh); 643 break; 644 645 case NF4SOCK: 646 status = nfsd_create(rqstp, &cstate->current_fh, 647 create->cr_name, create->cr_namelen, 648 &create->cr_iattr, S_IFSOCK, 0, &resfh); 649 break; 650 651 case NF4FIFO: 652 status = nfsd_create(rqstp, &cstate->current_fh, 653 create->cr_name, create->cr_namelen, 654 &create->cr_iattr, S_IFIFO, 0, &resfh); 655 break; 656 657 case NF4DIR: 658 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 659 status = nfsd_create(rqstp, &cstate->current_fh, 660 create->cr_name, create->cr_namelen, 661 &create->cr_iattr, S_IFDIR, 0, &resfh); 662 break; 663 664 default: 665 status = nfserr_badtype; 666 } 667 668 if (status) 669 goto out; 670 671 if (create->cr_label.len) 672 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 673 674 if (create->cr_acl != NULL) 675 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 676 create->cr_bmval); 677 678 fh_unlock(&cstate->current_fh); 679 set_change_info(&create->cr_cinfo, &cstate->current_fh); 680 fh_dup2(&cstate->current_fh, &resfh); 681 out: 682 fh_put(&resfh); 683 return status; 684 } 685 686 static __be32 687 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 688 struct nfsd4_getattr *getattr) 689 { 690 __be32 status; 691 692 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 693 if (status) 694 return status; 695 696 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 697 return nfserr_inval; 698 699 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 700 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 701 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 702 703 getattr->ga_fhp = &cstate->current_fh; 704 return nfs_ok; 705 } 706 707 static __be32 708 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 709 struct nfsd4_link *link) 710 { 711 __be32 status = nfserr_nofilehandle; 712 713 if (!cstate->save_fh.fh_dentry) 714 return status; 715 status = nfsd_link(rqstp, &cstate->current_fh, 716 link->li_name, link->li_namelen, &cstate->save_fh); 717 if (!status) 718 set_change_info(&link->li_cinfo, &cstate->current_fh); 719 return status; 720 } 721 722 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 723 { 724 struct svc_fh tmp_fh; 725 __be32 ret; 726 727 fh_init(&tmp_fh, NFS4_FHSIZE); 728 ret = exp_pseudoroot(rqstp, &tmp_fh); 729 if (ret) 730 return ret; 731 if (tmp_fh.fh_dentry == fh->fh_dentry) { 732 fh_put(&tmp_fh); 733 return nfserr_noent; 734 } 735 fh_put(&tmp_fh); 736 return nfsd_lookup(rqstp, fh, "..", 2, fh); 737 } 738 739 static __be32 740 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 741 void *arg) 742 { 743 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 744 } 745 746 static __be32 747 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 748 struct nfsd4_lookup *lookup) 749 { 750 return nfsd_lookup(rqstp, &cstate->current_fh, 751 lookup->lo_name, lookup->lo_len, 752 &cstate->current_fh); 753 } 754 755 static __be32 756 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 757 struct nfsd4_read *read) 758 { 759 __be32 status; 760 761 read->rd_filp = NULL; 762 if (read->rd_offset >= OFFSET_MAX) 763 return nfserr_inval; 764 765 /* 766 * If we do a zero copy read, then a client will see read data 767 * that reflects the state of the file *after* performing the 768 * following compound. 769 * 770 * To ensure proper ordering, we therefore turn off zero copy if 771 * the client wants us to do more in this compound: 772 */ 773 if (!nfsd4_last_compound_op(rqstp)) 774 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 775 776 /* check stateid */ 777 status = nfs4_preprocess_stateid_op(rqstp, cstate, &read->rd_stateid, 778 RD_STATE, &read->rd_filp, &read->rd_tmp_file); 779 if (status) { 780 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 781 goto out; 782 } 783 status = nfs_ok; 784 out: 785 read->rd_rqstp = rqstp; 786 read->rd_fhp = &cstate->current_fh; 787 return status; 788 } 789 790 static __be32 791 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 792 struct nfsd4_readdir *readdir) 793 { 794 u64 cookie = readdir->rd_cookie; 795 static const nfs4_verifier zeroverf; 796 797 /* no need to check permission - this will be done in nfsd_readdir() */ 798 799 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 800 return nfserr_inval; 801 802 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 803 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 804 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 805 806 if ((cookie == 1) || (cookie == 2) || 807 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 808 return nfserr_bad_cookie; 809 810 readdir->rd_rqstp = rqstp; 811 readdir->rd_fhp = &cstate->current_fh; 812 return nfs_ok; 813 } 814 815 static __be32 816 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 817 struct nfsd4_readlink *readlink) 818 { 819 readlink->rl_rqstp = rqstp; 820 readlink->rl_fhp = &cstate->current_fh; 821 return nfs_ok; 822 } 823 824 static __be32 825 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 826 struct nfsd4_remove *remove) 827 { 828 __be32 status; 829 830 if (opens_in_grace(SVC_NET(rqstp))) 831 return nfserr_grace; 832 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 833 remove->rm_name, remove->rm_namelen); 834 if (!status) { 835 fh_unlock(&cstate->current_fh); 836 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 837 } 838 return status; 839 } 840 841 static __be32 842 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 843 struct nfsd4_rename *rename) 844 { 845 __be32 status = nfserr_nofilehandle; 846 847 if (!cstate->save_fh.fh_dentry) 848 return status; 849 if (opens_in_grace(SVC_NET(rqstp)) && 850 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 851 return nfserr_grace; 852 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 853 rename->rn_snamelen, &cstate->current_fh, 854 rename->rn_tname, rename->rn_tnamelen); 855 if (status) 856 return status; 857 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 858 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 859 return nfs_ok; 860 } 861 862 static __be32 863 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 864 struct nfsd4_secinfo *secinfo) 865 { 866 struct svc_fh resfh; 867 struct svc_export *exp; 868 struct dentry *dentry; 869 __be32 err; 870 871 fh_init(&resfh, NFS4_FHSIZE); 872 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 873 if (err) 874 return err; 875 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 876 secinfo->si_name, secinfo->si_namelen, 877 &exp, &dentry); 878 if (err) 879 return err; 880 if (d_really_is_negative(dentry)) { 881 exp_put(exp); 882 err = nfserr_noent; 883 } else 884 secinfo->si_exp = exp; 885 dput(dentry); 886 if (cstate->minorversion) 887 /* See rfc 5661 section 2.6.3.1.1.8 */ 888 fh_put(&cstate->current_fh); 889 return err; 890 } 891 892 static __be32 893 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 894 struct nfsd4_secinfo_no_name *sin) 895 { 896 __be32 err; 897 898 switch (sin->sin_style) { 899 case NFS4_SECINFO_STYLE4_CURRENT_FH: 900 break; 901 case NFS4_SECINFO_STYLE4_PARENT: 902 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 903 if (err) 904 return err; 905 break; 906 default: 907 return nfserr_inval; 908 } 909 910 sin->sin_exp = exp_get(cstate->current_fh.fh_export); 911 fh_put(&cstate->current_fh); 912 return nfs_ok; 913 } 914 915 static __be32 916 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 917 struct nfsd4_setattr *setattr) 918 { 919 __be32 status = nfs_ok; 920 int err; 921 922 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 923 status = nfs4_preprocess_stateid_op(rqstp, cstate, 924 &setattr->sa_stateid, WR_STATE, NULL, NULL); 925 if (status) { 926 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 927 return status; 928 } 929 } 930 err = fh_want_write(&cstate->current_fh); 931 if (err) 932 return nfserrno(err); 933 status = nfs_ok; 934 935 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 936 nfsd_attrmask); 937 if (status) 938 goto out; 939 940 if (setattr->sa_acl != NULL) 941 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 942 setattr->sa_acl); 943 if (status) 944 goto out; 945 if (setattr->sa_label.len) 946 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 947 &setattr->sa_label); 948 if (status) 949 goto out; 950 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 951 0, (time_t)0); 952 out: 953 fh_drop_write(&cstate->current_fh); 954 return status; 955 } 956 957 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 958 { 959 int i = 1; 960 int buflen = write->wr_buflen; 961 962 vec[0].iov_base = write->wr_head.iov_base; 963 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 964 buflen -= vec[0].iov_len; 965 966 while (buflen) { 967 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 968 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 969 buflen -= vec[i].iov_len; 970 i++; 971 } 972 return i; 973 } 974 975 static __be32 976 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 977 struct nfsd4_write *write) 978 { 979 stateid_t *stateid = &write->wr_stateid; 980 struct file *filp = NULL; 981 __be32 status = nfs_ok; 982 unsigned long cnt; 983 int nvecs; 984 985 if (write->wr_offset >= OFFSET_MAX) 986 return nfserr_inval; 987 988 status = nfs4_preprocess_stateid_op(rqstp, cstate, stateid, WR_STATE, 989 &filp, NULL); 990 if (status) { 991 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 992 return status; 993 } 994 995 cnt = write->wr_buflen; 996 write->wr_how_written = write->wr_stable_how; 997 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 998 999 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1000 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1001 1002 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp, 1003 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 1004 &write->wr_how_written); 1005 fput(filp); 1006 1007 write->wr_bytes_written = cnt; 1008 1009 return status; 1010 } 1011 1012 static __be32 1013 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1014 struct nfsd4_fallocate *fallocate, int flags) 1015 { 1016 __be32 status = nfserr_notsupp; 1017 struct file *file; 1018 1019 status = nfs4_preprocess_stateid_op(rqstp, cstate, 1020 &fallocate->falloc_stateid, 1021 WR_STATE, &file, NULL); 1022 if (status != nfs_ok) { 1023 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1024 return status; 1025 } 1026 1027 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file, 1028 fallocate->falloc_offset, 1029 fallocate->falloc_length, 1030 flags); 1031 fput(file); 1032 return status; 1033 } 1034 1035 static __be32 1036 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1037 struct nfsd4_fallocate *fallocate) 1038 { 1039 return nfsd4_fallocate(rqstp, cstate, fallocate, 0); 1040 } 1041 1042 static __be32 1043 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1044 struct nfsd4_fallocate *fallocate) 1045 { 1046 return nfsd4_fallocate(rqstp, cstate, fallocate, 1047 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1048 } 1049 1050 static __be32 1051 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1052 struct nfsd4_seek *seek) 1053 { 1054 int whence; 1055 __be32 status; 1056 struct file *file; 1057 1058 status = nfs4_preprocess_stateid_op(rqstp, cstate, 1059 &seek->seek_stateid, 1060 RD_STATE, &file, NULL); 1061 if (status) { 1062 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1063 return status; 1064 } 1065 1066 switch (seek->seek_whence) { 1067 case NFS4_CONTENT_DATA: 1068 whence = SEEK_DATA; 1069 break; 1070 case NFS4_CONTENT_HOLE: 1071 whence = SEEK_HOLE; 1072 break; 1073 default: 1074 status = nfserr_union_notsupp; 1075 goto out; 1076 } 1077 1078 /* 1079 * Note: This call does change file->f_pos, but nothing in NFSD 1080 * should ever file->f_pos. 1081 */ 1082 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); 1083 if (seek->seek_pos < 0) 1084 status = nfserrno(seek->seek_pos); 1085 else if (seek->seek_pos >= i_size_read(file_inode(file))) 1086 seek->seek_eof = true; 1087 1088 out: 1089 fput(file); 1090 return status; 1091 } 1092 1093 /* This routine never returns NFS_OK! If there are no other errors, it 1094 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1095 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1096 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1097 */ 1098 static __be32 1099 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1100 struct nfsd4_verify *verify) 1101 { 1102 __be32 *buf, *p; 1103 int count; 1104 __be32 status; 1105 1106 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1107 if (status) 1108 return status; 1109 1110 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1111 if (status) 1112 return status; 1113 1114 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1115 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1116 return nfserr_inval; 1117 if (verify->ve_attrlen & 3) 1118 return nfserr_inval; 1119 1120 /* count in words: 1121 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1122 */ 1123 count = 4 + (verify->ve_attrlen >> 2); 1124 buf = kmalloc(count << 2, GFP_KERNEL); 1125 if (!buf) 1126 return nfserr_jukebox; 1127 1128 p = buf; 1129 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1130 cstate->current_fh.fh_export, 1131 cstate->current_fh.fh_dentry, 1132 verify->ve_bmval, 1133 rqstp, 0); 1134 /* 1135 * If nfsd4_encode_fattr() ran out of space, assume that's because 1136 * the attributes are longer (hence different) than those given: 1137 */ 1138 if (status == nfserr_resource) 1139 status = nfserr_not_same; 1140 if (status) 1141 goto out_kfree; 1142 1143 /* skip bitmap */ 1144 p = buf + 1 + ntohl(buf[0]); 1145 status = nfserr_not_same; 1146 if (ntohl(*p++) != verify->ve_attrlen) 1147 goto out_kfree; 1148 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1149 status = nfserr_same; 1150 1151 out_kfree: 1152 kfree(buf); 1153 return status; 1154 } 1155 1156 static __be32 1157 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1158 struct nfsd4_verify *verify) 1159 { 1160 __be32 status; 1161 1162 status = _nfsd4_verify(rqstp, cstate, verify); 1163 return status == nfserr_not_same ? nfs_ok : status; 1164 } 1165 1166 static __be32 1167 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1168 struct nfsd4_verify *verify) 1169 { 1170 __be32 status; 1171 1172 status = _nfsd4_verify(rqstp, cstate, verify); 1173 return status == nfserr_same ? nfs_ok : status; 1174 } 1175 1176 #ifdef CONFIG_NFSD_PNFS 1177 static const struct nfsd4_layout_ops * 1178 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1179 { 1180 if (!exp->ex_layout_type) { 1181 dprintk("%s: export does not support pNFS\n", __func__); 1182 return NULL; 1183 } 1184 1185 if (exp->ex_layout_type != layout_type) { 1186 dprintk("%s: layout type %d not supported\n", 1187 __func__, layout_type); 1188 return NULL; 1189 } 1190 1191 return nfsd4_layout_ops[layout_type]; 1192 } 1193 1194 static __be32 1195 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1196 struct nfsd4_compound_state *cstate, 1197 struct nfsd4_getdeviceinfo *gdp) 1198 { 1199 const struct nfsd4_layout_ops *ops; 1200 struct nfsd4_deviceid_map *map; 1201 struct svc_export *exp; 1202 __be32 nfserr; 1203 1204 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1205 __func__, 1206 gdp->gd_layout_type, 1207 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1208 gdp->gd_maxcount); 1209 1210 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1211 if (!map) { 1212 dprintk("%s: couldn't find device ID to export mapping!\n", 1213 __func__); 1214 return nfserr_noent; 1215 } 1216 1217 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1218 if (IS_ERR(exp)) { 1219 dprintk("%s: could not find device id\n", __func__); 1220 return nfserr_noent; 1221 } 1222 1223 nfserr = nfserr_layoutunavailable; 1224 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1225 if (!ops) 1226 goto out; 1227 1228 nfserr = nfs_ok; 1229 if (gdp->gd_maxcount != 0) 1230 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, gdp); 1231 1232 gdp->gd_notify_types &= ops->notify_types; 1233 out: 1234 exp_put(exp); 1235 return nfserr; 1236 } 1237 1238 static __be32 1239 nfsd4_layoutget(struct svc_rqst *rqstp, 1240 struct nfsd4_compound_state *cstate, 1241 struct nfsd4_layoutget *lgp) 1242 { 1243 struct svc_fh *current_fh = &cstate->current_fh; 1244 const struct nfsd4_layout_ops *ops; 1245 struct nfs4_layout_stateid *ls; 1246 __be32 nfserr; 1247 int accmode; 1248 1249 switch (lgp->lg_seg.iomode) { 1250 case IOMODE_READ: 1251 accmode = NFSD_MAY_READ; 1252 break; 1253 case IOMODE_RW: 1254 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE; 1255 break; 1256 default: 1257 dprintk("%s: invalid iomode %d\n", 1258 __func__, lgp->lg_seg.iomode); 1259 nfserr = nfserr_badiomode; 1260 goto out; 1261 } 1262 1263 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1264 if (nfserr) 1265 goto out; 1266 1267 nfserr = nfserr_layoutunavailable; 1268 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1269 if (!ops) 1270 goto out; 1271 1272 /* 1273 * Verify minlength and range as per RFC5661: 1274 * o If loga_length is less than loga_minlength, 1275 * the metadata server MUST return NFS4ERR_INVAL. 1276 * o If the sum of loga_offset and loga_minlength exceeds 1277 * NFS4_UINT64_MAX, and loga_minlength is not 1278 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1279 * o If the sum of loga_offset and loga_length exceeds 1280 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1281 * the error NFS4ERR_INVAL MUST result. 1282 */ 1283 nfserr = nfserr_inval; 1284 if (lgp->lg_seg.length < lgp->lg_minlength || 1285 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1286 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1287 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1288 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1289 goto out; 1290 if (lgp->lg_seg.length == 0) 1291 goto out; 1292 1293 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1294 true, lgp->lg_layout_type, &ls); 1295 if (nfserr) { 1296 trace_layout_get_lookup_fail(&lgp->lg_sid); 1297 goto out; 1298 } 1299 1300 nfserr = nfserr_recallconflict; 1301 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1302 goto out_put_stid; 1303 1304 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1305 current_fh, lgp); 1306 if (nfserr) 1307 goto out_put_stid; 1308 1309 nfserr = nfsd4_insert_layout(lgp, ls); 1310 1311 out_put_stid: 1312 mutex_unlock(&ls->ls_mutex); 1313 nfs4_put_stid(&ls->ls_stid); 1314 out: 1315 return nfserr; 1316 } 1317 1318 static __be32 1319 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1320 struct nfsd4_compound_state *cstate, 1321 struct nfsd4_layoutcommit *lcp) 1322 { 1323 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1324 struct svc_fh *current_fh = &cstate->current_fh; 1325 const struct nfsd4_layout_ops *ops; 1326 loff_t new_size = lcp->lc_last_wr + 1; 1327 struct inode *inode; 1328 struct nfs4_layout_stateid *ls; 1329 __be32 nfserr; 1330 1331 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 1332 if (nfserr) 1333 goto out; 1334 1335 nfserr = nfserr_layoutunavailable; 1336 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 1337 if (!ops) 1338 goto out; 1339 inode = d_inode(current_fh->fh_dentry); 1340 1341 nfserr = nfserr_inval; 1342 if (new_size <= seg->offset) { 1343 dprintk("pnfsd: last write before layout segment\n"); 1344 goto out; 1345 } 1346 if (new_size > seg->offset + seg->length) { 1347 dprintk("pnfsd: last write beyond layout segment\n"); 1348 goto out; 1349 } 1350 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 1351 dprintk("pnfsd: layoutcommit beyond EOF\n"); 1352 goto out; 1353 } 1354 1355 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 1356 false, lcp->lc_layout_type, 1357 &ls); 1358 if (nfserr) { 1359 trace_layout_commit_lookup_fail(&lcp->lc_sid); 1360 /* fixup error code as per RFC5661 */ 1361 if (nfserr == nfserr_bad_stateid) 1362 nfserr = nfserr_badlayout; 1363 goto out; 1364 } 1365 1366 /* LAYOUTCOMMIT does not require any serialization */ 1367 mutex_unlock(&ls->ls_mutex); 1368 1369 if (new_size > i_size_read(inode)) { 1370 lcp->lc_size_chg = 1; 1371 lcp->lc_newsize = new_size; 1372 } else { 1373 lcp->lc_size_chg = 0; 1374 } 1375 1376 nfserr = ops->proc_layoutcommit(inode, lcp); 1377 nfs4_put_stid(&ls->ls_stid); 1378 out: 1379 return nfserr; 1380 } 1381 1382 static __be32 1383 nfsd4_layoutreturn(struct svc_rqst *rqstp, 1384 struct nfsd4_compound_state *cstate, 1385 struct nfsd4_layoutreturn *lrp) 1386 { 1387 struct svc_fh *current_fh = &cstate->current_fh; 1388 __be32 nfserr; 1389 1390 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 1391 if (nfserr) 1392 goto out; 1393 1394 nfserr = nfserr_layoutunavailable; 1395 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 1396 goto out; 1397 1398 switch (lrp->lr_seg.iomode) { 1399 case IOMODE_READ: 1400 case IOMODE_RW: 1401 case IOMODE_ANY: 1402 break; 1403 default: 1404 dprintk("%s: invalid iomode %d\n", __func__, 1405 lrp->lr_seg.iomode); 1406 nfserr = nfserr_inval; 1407 goto out; 1408 } 1409 1410 switch (lrp->lr_return_type) { 1411 case RETURN_FILE: 1412 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 1413 break; 1414 case RETURN_FSID: 1415 case RETURN_ALL: 1416 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 1417 break; 1418 default: 1419 dprintk("%s: invalid return_type %d\n", __func__, 1420 lrp->lr_return_type); 1421 nfserr = nfserr_inval; 1422 break; 1423 } 1424 out: 1425 return nfserr; 1426 } 1427 #endif /* CONFIG_NFSD_PNFS */ 1428 1429 /* 1430 * NULL call. 1431 */ 1432 static __be32 1433 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1434 { 1435 return nfs_ok; 1436 } 1437 1438 static inline void nfsd4_increment_op_stats(u32 opnum) 1439 { 1440 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1441 nfsdstats.nfs4_opcount[opnum]++; 1442 } 1443 1444 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1445 void *); 1446 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1447 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1448 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1449 1450 enum nfsd4_op_flags { 1451 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1452 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1453 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1454 /* For rfc 5661 section 2.6.3.1.1: */ 1455 OP_HANDLES_WRONGSEC = 1 << 3, 1456 OP_IS_PUTFH_LIKE = 1 << 4, 1457 /* 1458 * These are the ops whose result size we estimate before 1459 * encoding, to avoid performing an op then not being able to 1460 * respond or cache a response. This includes writes and setattrs 1461 * as well as the operations usually called "nonidempotent": 1462 */ 1463 OP_MODIFIES_SOMETHING = 1 << 5, 1464 /* 1465 * Cache compounds containing these ops in the xid-based drc: 1466 * We use the DRC for compounds containing non-idempotent 1467 * operations, *except* those that are 4.1-specific (since 1468 * sessions provide their own EOS), and except for stateful 1469 * operations other than setclientid and setclientid_confirm 1470 * (since sequence numbers provide EOS for open, lock, etc in 1471 * the v4.0 case). 1472 */ 1473 OP_CACHEME = 1 << 6, 1474 /* 1475 * These are ops which clear current state id. 1476 */ 1477 OP_CLEAR_STATEID = 1 << 7, 1478 }; 1479 1480 struct nfsd4_operation { 1481 nfsd4op_func op_func; 1482 u32 op_flags; 1483 char *op_name; 1484 /* Try to get response size before operation */ 1485 nfsd4op_rsize op_rsize_bop; 1486 stateid_getter op_get_currentstateid; 1487 stateid_setter op_set_currentstateid; 1488 }; 1489 1490 static struct nfsd4_operation nfsd4_ops[]; 1491 1492 static const char *nfsd4_op_name(unsigned opnum); 1493 1494 /* 1495 * Enforce NFSv4.1 COMPOUND ordering rules: 1496 * 1497 * Also note, enforced elsewhere: 1498 * - SEQUENCE other than as first op results in 1499 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1500 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1501 * (Enforced in nfsd4_bind_conn_to_session().) 1502 * - DESTROY_SESSION must be the final operation in a compound, if 1503 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1504 * (Enforced in nfsd4_destroy_session().) 1505 */ 1506 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1507 { 1508 struct nfsd4_op *op = &args->ops[0]; 1509 1510 /* These ordering requirements don't apply to NFSv4.0: */ 1511 if (args->minorversion == 0) 1512 return nfs_ok; 1513 /* This is weird, but OK, not our problem: */ 1514 if (args->opcnt == 0) 1515 return nfs_ok; 1516 if (op->status == nfserr_op_illegal) 1517 return nfs_ok; 1518 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1519 return nfserr_op_not_in_session; 1520 if (op->opnum == OP_SEQUENCE) 1521 return nfs_ok; 1522 if (args->opcnt != 1) 1523 return nfserr_not_only_op; 1524 return nfs_ok; 1525 } 1526 1527 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1528 { 1529 return &nfsd4_ops[op->opnum]; 1530 } 1531 1532 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1533 { 1534 if (op->opnum == OP_ILLEGAL) 1535 return false; 1536 return OPDESC(op)->op_flags & OP_CACHEME; 1537 } 1538 1539 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1540 { 1541 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1542 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1543 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1544 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1545 struct nfsd4_operation *thisd; 1546 struct nfsd4_operation *nextd; 1547 1548 thisd = OPDESC(this); 1549 /* 1550 * Most ops check wronsec on our own; only the putfh-like ops 1551 * have special rules. 1552 */ 1553 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1554 return false; 1555 /* 1556 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1557 * put-filehandle operation if we're not going to use the 1558 * result: 1559 */ 1560 if (argp->opcnt == resp->opcnt) 1561 return false; 1562 if (next->opnum == OP_ILLEGAL) 1563 return false; 1564 nextd = OPDESC(next); 1565 /* 1566 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1567 * errors themselves as necessary; others should check for them 1568 * now: 1569 */ 1570 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1571 } 1572 1573 static void svcxdr_init_encode(struct svc_rqst *rqstp, 1574 struct nfsd4_compoundres *resp) 1575 { 1576 struct xdr_stream *xdr = &resp->xdr; 1577 struct xdr_buf *buf = &rqstp->rq_res; 1578 struct kvec *head = buf->head; 1579 1580 xdr->buf = buf; 1581 xdr->iov = head; 1582 xdr->p = head->iov_base + head->iov_len; 1583 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1584 /* Tail and page_len should be zero at this point: */ 1585 buf->len = buf->head[0].iov_len; 1586 xdr->scratch.iov_len = 0; 1587 xdr->page_ptr = buf->pages - 1; 1588 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1589 - rqstp->rq_auth_slack; 1590 } 1591 1592 /* 1593 * COMPOUND call. 1594 */ 1595 static __be32 1596 nfsd4_proc_compound(struct svc_rqst *rqstp, 1597 struct nfsd4_compoundargs *args, 1598 struct nfsd4_compoundres *resp) 1599 { 1600 struct nfsd4_op *op; 1601 struct nfsd4_operation *opdesc; 1602 struct nfsd4_compound_state *cstate = &resp->cstate; 1603 struct svc_fh *current_fh = &cstate->current_fh; 1604 struct svc_fh *save_fh = &cstate->save_fh; 1605 __be32 status; 1606 1607 svcxdr_init_encode(rqstp, resp); 1608 resp->tagp = resp->xdr.p; 1609 /* reserve space for: taglen, tag, and opcnt */ 1610 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1611 resp->taglen = args->taglen; 1612 resp->tag = args->tag; 1613 resp->rqstp = rqstp; 1614 cstate->minorversion = args->minorversion; 1615 fh_init(current_fh, NFS4_FHSIZE); 1616 fh_init(save_fh, NFS4_FHSIZE); 1617 /* 1618 * Don't use the deferral mechanism for NFSv4; compounds make it 1619 * too hard to avoid non-idempotency problems. 1620 */ 1621 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1622 1623 /* 1624 * According to RFC3010, this takes precedence over all other errors. 1625 */ 1626 status = nfserr_minor_vers_mismatch; 1627 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1628 goto out; 1629 1630 status = nfs41_check_op_ordering(args); 1631 if (status) { 1632 op = &args->ops[0]; 1633 op->status = status; 1634 goto encode_op; 1635 } 1636 1637 while (!status && resp->opcnt < args->opcnt) { 1638 op = &args->ops[resp->opcnt++]; 1639 1640 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1641 resp->opcnt, args->opcnt, op->opnum, 1642 nfsd4_op_name(op->opnum)); 1643 /* 1644 * The XDR decode routines may have pre-set op->status; 1645 * for example, if there is a miscellaneous XDR error 1646 * it will be set to nfserr_bad_xdr. 1647 */ 1648 if (op->status) { 1649 if (op->opnum == OP_OPEN) 1650 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1651 goto encode_op; 1652 } 1653 1654 opdesc = OPDESC(op); 1655 1656 if (!current_fh->fh_dentry) { 1657 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1658 op->status = nfserr_nofilehandle; 1659 goto encode_op; 1660 } 1661 } else if (current_fh->fh_export->ex_fslocs.migrated && 1662 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1663 op->status = nfserr_moved; 1664 goto encode_op; 1665 } 1666 1667 fh_clear_wcc(current_fh); 1668 1669 /* If op is non-idempotent */ 1670 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1671 /* 1672 * Don't execute this op if we couldn't encode a 1673 * succesful reply: 1674 */ 1675 u32 plen = opdesc->op_rsize_bop(rqstp, op); 1676 /* 1677 * Plus if there's another operation, make sure 1678 * we'll have space to at least encode an error: 1679 */ 1680 if (resp->opcnt < args->opcnt) 1681 plen += COMPOUND_ERR_SLACK_SPACE; 1682 op->status = nfsd4_check_resp_size(resp, plen); 1683 } 1684 1685 if (op->status) 1686 goto encode_op; 1687 1688 if (opdesc->op_get_currentstateid) 1689 opdesc->op_get_currentstateid(cstate, &op->u); 1690 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1691 1692 if (!op->status) { 1693 if (opdesc->op_set_currentstateid) 1694 opdesc->op_set_currentstateid(cstate, &op->u); 1695 1696 if (opdesc->op_flags & OP_CLEAR_STATEID) 1697 clear_current_stateid(cstate); 1698 1699 if (need_wrongsec_check(rqstp)) 1700 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 1701 } 1702 1703 encode_op: 1704 /* Only from SEQUENCE */ 1705 if (cstate->status == nfserr_replay_cache) { 1706 dprintk("%s NFS4.1 replay from cache\n", __func__); 1707 status = op->status; 1708 goto out; 1709 } 1710 if (op->status == nfserr_replay_me) { 1711 op->replay = &cstate->replay_owner->so_replay; 1712 nfsd4_encode_replay(&resp->xdr, op); 1713 status = op->status = op->replay->rp_status; 1714 } else { 1715 nfsd4_encode_operation(resp, op); 1716 status = op->status; 1717 } 1718 1719 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1720 args->ops, args->opcnt, resp->opcnt, op->opnum, 1721 be32_to_cpu(status)); 1722 1723 nfsd4_cstate_clear_replay(cstate); 1724 nfsd4_increment_op_stats(op->opnum); 1725 } 1726 1727 cstate->status = status; 1728 fh_put(current_fh); 1729 fh_put(save_fh); 1730 BUG_ON(cstate->replay_owner); 1731 out: 1732 /* Reset deferral mechanism for RPC deferrals */ 1733 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1734 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1735 return status; 1736 } 1737 1738 #define op_encode_hdr_size (2) 1739 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1740 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1741 #define op_encode_change_info_maxsz (5) 1742 #define nfs4_fattr_bitmap_maxsz (4) 1743 1744 /* We'll fall back on returning no lockowner if run out of space: */ 1745 #define op_encode_lockowner_maxsz (0) 1746 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1747 1748 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1749 1750 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1751 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1752 op_encode_ace_maxsz) 1753 1754 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1755 1756 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1757 { 1758 return (op_encode_hdr_size) * sizeof(__be32); 1759 } 1760 1761 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1762 { 1763 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1764 } 1765 1766 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1767 { 1768 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1769 } 1770 1771 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1772 { 1773 return (op_encode_hdr_size + op_encode_change_info_maxsz 1774 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1775 } 1776 1777 /* 1778 * Note since this is an idempotent operation we won't insist on failing 1779 * the op prematurely if the estimate is too large. We may turn off splice 1780 * reads unnecessarily. 1781 */ 1782 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1783 struct nfsd4_op *op) 1784 { 1785 u32 *bmap = op->u.getattr.ga_bmval; 1786 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1787 u32 ret = 0; 1788 1789 if (bmap0 & FATTR4_WORD0_ACL) 1790 return svc_max_payload(rqstp); 1791 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1792 return svc_max_payload(rqstp); 1793 1794 if (bmap1 & FATTR4_WORD1_OWNER) { 1795 ret += IDMAP_NAMESZ + 4; 1796 bmap1 &= ~FATTR4_WORD1_OWNER; 1797 } 1798 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1799 ret += IDMAP_NAMESZ + 4; 1800 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1801 } 1802 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1803 ret += NFS4_FHSIZE + 4; 1804 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1805 } 1806 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1807 ret += NFS4_MAXLABELLEN + 12; 1808 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1809 } 1810 /* 1811 * Largest of remaining attributes are 16 bytes (e.g., 1812 * supported_attributes) 1813 */ 1814 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1815 /* bitmask, length */ 1816 ret += 20; 1817 return ret; 1818 } 1819 1820 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1821 { 1822 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1823 * sizeof(__be32); 1824 } 1825 1826 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1827 { 1828 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1829 * sizeof(__be32); 1830 } 1831 1832 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1833 { 1834 return (op_encode_hdr_size + op_encode_stateid_maxsz 1835 + op_encode_change_info_maxsz + 1 1836 + nfs4_fattr_bitmap_maxsz 1837 + op_encode_delegation_maxsz) * sizeof(__be32); 1838 } 1839 1840 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1841 { 1842 u32 maxcount = 0, rlen = 0; 1843 1844 maxcount = svc_max_payload(rqstp); 1845 rlen = min(op->u.read.rd_length, maxcount); 1846 1847 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1848 } 1849 1850 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1851 { 1852 u32 maxcount = 0, rlen = 0; 1853 1854 maxcount = svc_max_payload(rqstp); 1855 rlen = min(op->u.readdir.rd_maxcount, maxcount); 1856 1857 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1858 XDR_QUADLEN(rlen)) * sizeof(__be32); 1859 } 1860 1861 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1862 { 1863 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1864 * sizeof(__be32); 1865 } 1866 1867 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1868 { 1869 return (op_encode_hdr_size + op_encode_change_info_maxsz 1870 + op_encode_change_info_maxsz) * sizeof(__be32); 1871 } 1872 1873 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1874 struct nfsd4_op *op) 1875 { 1876 return (op_encode_hdr_size 1877 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 1878 } 1879 1880 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1881 { 1882 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1883 } 1884 1885 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1886 { 1887 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1888 sizeof(__be32); 1889 } 1890 1891 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1892 { 1893 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 1894 } 1895 1896 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1897 { 1898 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1899 1 + 1 + /* eir_flags, spr_how */\ 1900 4 + /* spo_must_enforce & _allow with bitmap */\ 1901 2 + /*eir_server_owner.so_minor_id */\ 1902 /* eir_server_owner.so_major_id<> */\ 1903 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1904 /* eir_server_scope<> */\ 1905 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1906 1 + /* eir_server_impl_id array length */\ 1907 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1908 } 1909 1910 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1911 { 1912 return (op_encode_hdr_size + \ 1913 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1914 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1915 } 1916 1917 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1918 { 1919 return (op_encode_hdr_size + \ 1920 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1921 2 + /* csr_sequence, csr_flags */\ 1922 op_encode_channel_attrs_maxsz + \ 1923 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1924 } 1925 1926 #ifdef CONFIG_NFSD_PNFS 1927 /* 1928 * At this stage we don't really know what layout driver will handle the request, 1929 * so we need to define an arbitrary upper bound here. 1930 */ 1931 #define MAX_LAYOUT_SIZE 128 1932 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1933 { 1934 return (op_encode_hdr_size + 1935 1 /* logr_return_on_close */ + 1936 op_encode_stateid_maxsz + 1937 1 /* nr of layouts */ + 1938 MAX_LAYOUT_SIZE) * sizeof(__be32); 1939 } 1940 1941 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1942 { 1943 return (op_encode_hdr_size + 1944 1 /* locr_newsize */ + 1945 2 /* ns_size */) * sizeof(__be32); 1946 } 1947 1948 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1949 { 1950 return (op_encode_hdr_size + 1951 1 /* lrs_stateid */ + 1952 op_encode_stateid_maxsz) * sizeof(__be32); 1953 } 1954 #endif /* CONFIG_NFSD_PNFS */ 1955 1956 static struct nfsd4_operation nfsd4_ops[] = { 1957 [OP_ACCESS] = { 1958 .op_func = (nfsd4op_func)nfsd4_access, 1959 .op_name = "OP_ACCESS", 1960 }, 1961 [OP_CLOSE] = { 1962 .op_func = (nfsd4op_func)nfsd4_close, 1963 .op_flags = OP_MODIFIES_SOMETHING, 1964 .op_name = "OP_CLOSE", 1965 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1966 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 1967 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 1968 }, 1969 [OP_COMMIT] = { 1970 .op_func = (nfsd4op_func)nfsd4_commit, 1971 .op_flags = OP_MODIFIES_SOMETHING, 1972 .op_name = "OP_COMMIT", 1973 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 1974 }, 1975 [OP_CREATE] = { 1976 .op_func = (nfsd4op_func)nfsd4_create, 1977 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 1978 .op_name = "OP_CREATE", 1979 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 1980 }, 1981 [OP_DELEGRETURN] = { 1982 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1983 .op_flags = OP_MODIFIES_SOMETHING, 1984 .op_name = "OP_DELEGRETURN", 1985 .op_rsize_bop = nfsd4_only_status_rsize, 1986 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 1987 }, 1988 [OP_GETATTR] = { 1989 .op_func = (nfsd4op_func)nfsd4_getattr, 1990 .op_flags = ALLOWED_ON_ABSENT_FS, 1991 .op_rsize_bop = nfsd4_getattr_rsize, 1992 .op_name = "OP_GETATTR", 1993 }, 1994 [OP_GETFH] = { 1995 .op_func = (nfsd4op_func)nfsd4_getfh, 1996 .op_name = "OP_GETFH", 1997 }, 1998 [OP_LINK] = { 1999 .op_func = (nfsd4op_func)nfsd4_link, 2000 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2001 | OP_CACHEME, 2002 .op_name = "OP_LINK", 2003 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 2004 }, 2005 [OP_LOCK] = { 2006 .op_func = (nfsd4op_func)nfsd4_lock, 2007 .op_flags = OP_MODIFIES_SOMETHING, 2008 .op_name = "OP_LOCK", 2009 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 2010 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 2011 }, 2012 [OP_LOCKT] = { 2013 .op_func = (nfsd4op_func)nfsd4_lockt, 2014 .op_name = "OP_LOCKT", 2015 }, 2016 [OP_LOCKU] = { 2017 .op_func = (nfsd4op_func)nfsd4_locku, 2018 .op_flags = OP_MODIFIES_SOMETHING, 2019 .op_name = "OP_LOCKU", 2020 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2021 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 2022 }, 2023 [OP_LOOKUP] = { 2024 .op_func = (nfsd4op_func)nfsd4_lookup, 2025 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2026 .op_name = "OP_LOOKUP", 2027 }, 2028 [OP_LOOKUPP] = { 2029 .op_func = (nfsd4op_func)nfsd4_lookupp, 2030 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2031 .op_name = "OP_LOOKUPP", 2032 }, 2033 [OP_NVERIFY] = { 2034 .op_func = (nfsd4op_func)nfsd4_nverify, 2035 .op_name = "OP_NVERIFY", 2036 }, 2037 [OP_OPEN] = { 2038 .op_func = (nfsd4op_func)nfsd4_open, 2039 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2040 .op_name = "OP_OPEN", 2041 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 2042 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 2043 }, 2044 [OP_OPEN_CONFIRM] = { 2045 .op_func = (nfsd4op_func)nfsd4_open_confirm, 2046 .op_flags = OP_MODIFIES_SOMETHING, 2047 .op_name = "OP_OPEN_CONFIRM", 2048 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2049 }, 2050 [OP_OPEN_DOWNGRADE] = { 2051 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 2052 .op_flags = OP_MODIFIES_SOMETHING, 2053 .op_name = "OP_OPEN_DOWNGRADE", 2054 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2055 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 2056 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 2057 }, 2058 [OP_PUTFH] = { 2059 .op_func = (nfsd4op_func)nfsd4_putfh, 2060 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2061 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2062 .op_name = "OP_PUTFH", 2063 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2064 }, 2065 [OP_PUTPUBFH] = { 2066 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2067 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2068 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2069 .op_name = "OP_PUTPUBFH", 2070 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2071 }, 2072 [OP_PUTROOTFH] = { 2073 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2074 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2075 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2076 .op_name = "OP_PUTROOTFH", 2077 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2078 }, 2079 [OP_READ] = { 2080 .op_func = (nfsd4op_func)nfsd4_read, 2081 .op_name = "OP_READ", 2082 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 2083 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 2084 }, 2085 [OP_READDIR] = { 2086 .op_func = (nfsd4op_func)nfsd4_readdir, 2087 .op_name = "OP_READDIR", 2088 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 2089 }, 2090 [OP_READLINK] = { 2091 .op_func = (nfsd4op_func)nfsd4_readlink, 2092 .op_name = "OP_READLINK", 2093 }, 2094 [OP_REMOVE] = { 2095 .op_func = (nfsd4op_func)nfsd4_remove, 2096 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2097 .op_name = "OP_REMOVE", 2098 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 2099 }, 2100 [OP_RENAME] = { 2101 .op_func = (nfsd4op_func)nfsd4_rename, 2102 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2103 .op_name = "OP_RENAME", 2104 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 2105 }, 2106 [OP_RENEW] = { 2107 .op_func = (nfsd4op_func)nfsd4_renew, 2108 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2109 | OP_MODIFIES_SOMETHING, 2110 .op_name = "OP_RENEW", 2111 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2112 2113 }, 2114 [OP_RESTOREFH] = { 2115 .op_func = (nfsd4op_func)nfsd4_restorefh, 2116 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2117 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2118 .op_name = "OP_RESTOREFH", 2119 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2120 }, 2121 [OP_SAVEFH] = { 2122 .op_func = (nfsd4op_func)nfsd4_savefh, 2123 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2124 .op_name = "OP_SAVEFH", 2125 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2126 }, 2127 [OP_SECINFO] = { 2128 .op_func = (nfsd4op_func)nfsd4_secinfo, 2129 .op_flags = OP_HANDLES_WRONGSEC, 2130 .op_name = "OP_SECINFO", 2131 }, 2132 [OP_SETATTR] = { 2133 .op_func = (nfsd4op_func)nfsd4_setattr, 2134 .op_name = "OP_SETATTR", 2135 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2136 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 2137 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 2138 }, 2139 [OP_SETCLIENTID] = { 2140 .op_func = (nfsd4op_func)nfsd4_setclientid, 2141 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2142 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2143 .op_name = "OP_SETCLIENTID", 2144 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 2145 }, 2146 [OP_SETCLIENTID_CONFIRM] = { 2147 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 2148 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2149 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2150 .op_name = "OP_SETCLIENTID_CONFIRM", 2151 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2152 }, 2153 [OP_VERIFY] = { 2154 .op_func = (nfsd4op_func)nfsd4_verify, 2155 .op_name = "OP_VERIFY", 2156 }, 2157 [OP_WRITE] = { 2158 .op_func = (nfsd4op_func)nfsd4_write, 2159 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2160 .op_name = "OP_WRITE", 2161 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 2162 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 2163 }, 2164 [OP_RELEASE_LOCKOWNER] = { 2165 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 2166 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2167 | OP_MODIFIES_SOMETHING, 2168 .op_name = "OP_RELEASE_LOCKOWNER", 2169 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2170 }, 2171 2172 /* NFSv4.1 operations */ 2173 [OP_EXCHANGE_ID] = { 2174 .op_func = (nfsd4op_func)nfsd4_exchange_id, 2175 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2176 | OP_MODIFIES_SOMETHING, 2177 .op_name = "OP_EXCHANGE_ID", 2178 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 2179 }, 2180 [OP_BACKCHANNEL_CTL] = { 2181 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 2182 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2183 .op_name = "OP_BACKCHANNEL_CTL", 2184 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2185 }, 2186 [OP_BIND_CONN_TO_SESSION] = { 2187 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 2188 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2189 | OP_MODIFIES_SOMETHING, 2190 .op_name = "OP_BIND_CONN_TO_SESSION", 2191 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 2192 }, 2193 [OP_CREATE_SESSION] = { 2194 .op_func = (nfsd4op_func)nfsd4_create_session, 2195 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2196 | OP_MODIFIES_SOMETHING, 2197 .op_name = "OP_CREATE_SESSION", 2198 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 2199 }, 2200 [OP_DESTROY_SESSION] = { 2201 .op_func = (nfsd4op_func)nfsd4_destroy_session, 2202 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2203 | OP_MODIFIES_SOMETHING, 2204 .op_name = "OP_DESTROY_SESSION", 2205 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2206 }, 2207 [OP_SEQUENCE] = { 2208 .op_func = (nfsd4op_func)nfsd4_sequence, 2209 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 2210 .op_name = "OP_SEQUENCE", 2211 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize, 2212 }, 2213 [OP_DESTROY_CLIENTID] = { 2214 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 2215 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2216 | OP_MODIFIES_SOMETHING, 2217 .op_name = "OP_DESTROY_CLIENTID", 2218 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2219 }, 2220 [OP_RECLAIM_COMPLETE] = { 2221 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 2222 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2223 .op_name = "OP_RECLAIM_COMPLETE", 2224 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2225 }, 2226 [OP_SECINFO_NO_NAME] = { 2227 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 2228 .op_flags = OP_HANDLES_WRONGSEC, 2229 .op_name = "OP_SECINFO_NO_NAME", 2230 }, 2231 [OP_TEST_STATEID] = { 2232 .op_func = (nfsd4op_func)nfsd4_test_stateid, 2233 .op_flags = ALLOWED_WITHOUT_FH, 2234 .op_name = "OP_TEST_STATEID", 2235 }, 2236 [OP_FREE_STATEID] = { 2237 .op_func = (nfsd4op_func)nfsd4_free_stateid, 2238 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2239 .op_name = "OP_FREE_STATEID", 2240 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 2241 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2242 }, 2243 #ifdef CONFIG_NFSD_PNFS 2244 [OP_GETDEVICEINFO] = { 2245 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo, 2246 .op_flags = ALLOWED_WITHOUT_FH, 2247 .op_name = "OP_GETDEVICEINFO", 2248 }, 2249 [OP_LAYOUTGET] = { 2250 .op_func = (nfsd4op_func)nfsd4_layoutget, 2251 .op_flags = OP_MODIFIES_SOMETHING, 2252 .op_name = "OP_LAYOUTGET", 2253 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize, 2254 }, 2255 [OP_LAYOUTCOMMIT] = { 2256 .op_func = (nfsd4op_func)nfsd4_layoutcommit, 2257 .op_flags = OP_MODIFIES_SOMETHING, 2258 .op_name = "OP_LAYOUTCOMMIT", 2259 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize, 2260 }, 2261 [OP_LAYOUTRETURN] = { 2262 .op_func = (nfsd4op_func)nfsd4_layoutreturn, 2263 .op_flags = OP_MODIFIES_SOMETHING, 2264 .op_name = "OP_LAYOUTRETURN", 2265 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize, 2266 }, 2267 #endif /* CONFIG_NFSD_PNFS */ 2268 2269 /* NFSv4.2 operations */ 2270 [OP_ALLOCATE] = { 2271 .op_func = (nfsd4op_func)nfsd4_allocate, 2272 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2273 .op_name = "OP_ALLOCATE", 2274 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2275 }, 2276 [OP_DEALLOCATE] = { 2277 .op_func = (nfsd4op_func)nfsd4_deallocate, 2278 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2279 .op_name = "OP_DEALLOCATE", 2280 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2281 }, 2282 [OP_SEEK] = { 2283 .op_func = (nfsd4op_func)nfsd4_seek, 2284 .op_name = "OP_SEEK", 2285 }, 2286 }; 2287 2288 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 2289 { 2290 struct nfsd4_operation *opdesc; 2291 nfsd4op_rsize estimator; 2292 2293 if (op->opnum == OP_ILLEGAL) 2294 return op_encode_hdr_size * sizeof(__be32); 2295 opdesc = OPDESC(op); 2296 estimator = opdesc->op_rsize_bop; 2297 return estimator ? estimator(rqstp, op) : PAGE_SIZE; 2298 } 2299 2300 void warn_on_nonidempotent_op(struct nfsd4_op *op) 2301 { 2302 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 2303 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 2304 op->opnum, nfsd4_op_name(op->opnum)); 2305 WARN_ON_ONCE(1); 2306 } 2307 } 2308 2309 static const char *nfsd4_op_name(unsigned opnum) 2310 { 2311 if (opnum < ARRAY_SIZE(nfsd4_ops)) 2312 return nfsd4_ops[opnum].op_name; 2313 return "unknown_operation"; 2314 } 2315 2316 #define nfsd4_voidres nfsd4_voidargs 2317 struct nfsd4_voidargs { int dummy; }; 2318 2319 static struct svc_procedure nfsd_procedures4[2] = { 2320 [NFSPROC4_NULL] = { 2321 .pc_func = (svc_procfunc) nfsd4_proc_null, 2322 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 2323 .pc_argsize = sizeof(struct nfsd4_voidargs), 2324 .pc_ressize = sizeof(struct nfsd4_voidres), 2325 .pc_cachetype = RC_NOCACHE, 2326 .pc_xdrressize = 1, 2327 }, 2328 [NFSPROC4_COMPOUND] = { 2329 .pc_func = (svc_procfunc) nfsd4_proc_compound, 2330 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 2331 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 2332 .pc_argsize = sizeof(struct nfsd4_compoundargs), 2333 .pc_ressize = sizeof(struct nfsd4_compoundres), 2334 .pc_release = nfsd4_release_compoundargs, 2335 .pc_cachetype = RC_NOCACHE, 2336 .pc_xdrressize = NFSD_BUFSIZE/4, 2337 }, 2338 }; 2339 2340 struct svc_version nfsd_version4 = { 2341 .vs_vers = 4, 2342 .vs_nproc = 2, 2343 .vs_proc = nfsd_procedures4, 2344 .vs_dispatch = nfsd_dispatch, 2345 .vs_xdrsize = NFS4_SVC_XDRSIZE, 2346 .vs_rpcb_optnl = 1, 2347 }; 2348 2349 /* 2350 * Local variables: 2351 * c-basic-offset: 8 2352 * End: 2353 */ 2354