1 /* 2 * Server-side procedures for NFSv4. 3 * 4 * Copyright (c) 2002 The Regents of the University of Michigan. 5 * All rights reserved. 6 * 7 * Kendrick Smith <kmsmith@umich.edu> 8 * Andy Adamson <andros@umich.edu> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 #include <linux/file.h> 36 #include <linux/falloc.h> 37 #include <linux/slab.h> 38 39 #include "idmap.h" 40 #include "cache.h" 41 #include "xdr4.h" 42 #include "vfs.h" 43 #include "current_stateid.h" 44 #include "netns.h" 45 #include "acl.h" 46 #include "pnfs.h" 47 #include "trace.h" 48 49 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 50 #include <linux/security.h> 51 52 static inline void 53 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 54 { 55 struct inode *inode = d_inode(resfh->fh_dentry); 56 int status; 57 58 inode_lock(inode); 59 status = security_inode_setsecctx(resfh->fh_dentry, 60 label->data, label->len); 61 inode_unlock(inode); 62 63 if (status) 64 /* 65 * XXX: We should really fail the whole open, but we may 66 * already have created a new file, so it may be too 67 * late. For now this seems the least of evils: 68 */ 69 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 70 71 return; 72 } 73 #else 74 static inline void 75 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 76 { } 77 #endif 78 79 #define NFSDDBG_FACILITY NFSDDBG_PROC 80 81 static u32 nfsd_attrmask[] = { 82 NFSD_WRITEABLE_ATTRS_WORD0, 83 NFSD_WRITEABLE_ATTRS_WORD1, 84 NFSD_WRITEABLE_ATTRS_WORD2 85 }; 86 87 static u32 nfsd41_ex_attrmask[] = { 88 NFSD_SUPPATTR_EXCLCREAT_WORD0, 89 NFSD_SUPPATTR_EXCLCREAT_WORD1, 90 NFSD_SUPPATTR_EXCLCREAT_WORD2 91 }; 92 93 static __be32 94 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 95 u32 *bmval, u32 *writable) 96 { 97 struct dentry *dentry = cstate->current_fh.fh_dentry; 98 99 /* 100 * Check about attributes are supported by the NFSv4 server or not. 101 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. 102 */ 103 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || 104 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || 105 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) 106 return nfserr_attrnotsupp; 107 108 /* 109 * Check FATTR4_WORD0_ACL can be supported 110 * in current environment or not. 111 */ 112 if (bmval[0] & FATTR4_WORD0_ACL) { 113 if (!IS_POSIXACL(d_inode(dentry))) 114 return nfserr_attrnotsupp; 115 } 116 117 /* 118 * According to spec, read-only attributes return ERR_INVAL. 119 */ 120 if (writable) { 121 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || 122 (bmval[2] & ~writable[2])) 123 return nfserr_inval; 124 } 125 126 return nfs_ok; 127 } 128 129 static __be32 130 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 131 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 132 { 133 __be32 status = nfs_ok; 134 135 if (open->op_create == NFS4_OPEN_CREATE) { 136 if (open->op_createmode == NFS4_CREATE_UNCHECKED 137 || open->op_createmode == NFS4_CREATE_GUARDED) 138 status = check_attr_support(rqstp, cstate, 139 open->op_bmval, nfsd_attrmask); 140 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 141 status = check_attr_support(rqstp, cstate, 142 open->op_bmval, nfsd41_ex_attrmask); 143 } 144 145 return status; 146 } 147 148 static int 149 is_create_with_attrs(struct nfsd4_open *open) 150 { 151 return open->op_create == NFS4_OPEN_CREATE 152 && (open->op_createmode == NFS4_CREATE_UNCHECKED 153 || open->op_createmode == NFS4_CREATE_GUARDED 154 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 155 } 156 157 /* 158 * if error occurs when setting the acl, just clear the acl bit 159 * in the returned attr bitmap. 160 */ 161 static void 162 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 163 struct nfs4_acl *acl, u32 *bmval) 164 { 165 __be32 status; 166 167 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 168 if (status) 169 /* 170 * We should probably fail the whole open at this point, 171 * but we've already created the file, so it's too late; 172 * So this seems the least of evils: 173 */ 174 bmval[0] &= ~FATTR4_WORD0_ACL; 175 } 176 177 static inline void 178 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 179 { 180 fh_put(dst); 181 dget(src->fh_dentry); 182 if (src->fh_export) 183 exp_get(src->fh_export); 184 *dst = *src; 185 } 186 187 static __be32 188 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 189 { 190 __be32 status; 191 192 if (open->op_truncate && 193 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 194 return nfserr_inval; 195 196 accmode |= NFSD_MAY_READ_IF_EXEC; 197 198 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 199 accmode |= NFSD_MAY_READ; 200 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 201 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 202 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 203 accmode |= NFSD_MAY_WRITE; 204 205 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 206 207 return status; 208 } 209 210 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 211 { 212 umode_t mode = d_inode(fh->fh_dentry)->i_mode; 213 214 if (S_ISREG(mode)) 215 return nfs_ok; 216 if (S_ISDIR(mode)) 217 return nfserr_isdir; 218 /* 219 * Using err_symlink as our catch-all case may look odd; but 220 * there's no other obvious error for this case in 4.0, and we 221 * happen to know that it will cause the linux v4 client to do 222 * the right thing on attempts to open something other than a 223 * regular file. 224 */ 225 return nfserr_symlink; 226 } 227 228 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 229 { 230 if (nfsd4_has_session(cstate)) 231 return; 232 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 233 &resfh->fh_handle); 234 } 235 236 static __be32 237 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) 238 { 239 struct svc_fh *current_fh = &cstate->current_fh; 240 int accmode; 241 __be32 status; 242 243 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 244 if (!*resfh) 245 return nfserr_jukebox; 246 fh_init(*resfh, NFS4_FHSIZE); 247 open->op_truncate = 0; 248 249 if (open->op_create) { 250 /* FIXME: check session persistence and pnfs flags. 251 * The nfsv4.1 spec requires the following semantics: 252 * 253 * Persistent | pNFS | Server REQUIRED | Client Allowed 254 * Reply Cache | server | | 255 * -------------+--------+-----------------+-------------------- 256 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 257 * | | | (SHOULD) 258 * | | and EXCLUSIVE4 | or EXCLUSIVE4 259 * | | | (SHOULD NOT) 260 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 261 * yes | no | GUARDED4 | GUARDED4 262 * yes | yes | GUARDED4 | GUARDED4 263 */ 264 265 /* 266 * Note: create modes (UNCHECKED,GUARDED...) are the same 267 * in NFSv4 as in v3 except EXCLUSIVE4_1. 268 */ 269 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, 270 open->op_fname.len, &open->op_iattr, 271 *resfh, open->op_createmode, 272 (u32 *)open->op_verf.data, 273 &open->op_truncate, &open->op_created); 274 275 if (!status && open->op_label.len) 276 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); 277 278 /* 279 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4 280 * use the returned bitmask to indicate which attributes 281 * we used to store the verifier: 282 */ 283 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0) 284 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS | 285 FATTR4_WORD1_TIME_MODIFY); 286 } else 287 /* 288 * Note this may exit with the parent still locked. 289 * We will hold the lock until nfsd4_open's final 290 * lookup, to prevent renames or unlinks until we've had 291 * a chance to an acquire a delegation if appropriate. 292 */ 293 status = nfsd_lookup(rqstp, current_fh, 294 open->op_fname.data, open->op_fname.len, *resfh); 295 if (status) 296 goto out; 297 status = nfsd_check_obj_isreg(*resfh); 298 if (status) 299 goto out; 300 301 if (is_create_with_attrs(open) && open->op_acl != NULL) 302 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); 303 304 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); 305 accmode = NFSD_MAY_NOP; 306 if (open->op_created || 307 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 308 accmode |= NFSD_MAY_OWNER_OVERRIDE; 309 status = do_open_permission(rqstp, *resfh, open, accmode); 310 set_change_info(&open->op_cinfo, current_fh); 311 out: 312 return status; 313 } 314 315 static __be32 316 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 317 { 318 struct svc_fh *current_fh = &cstate->current_fh; 319 __be32 status; 320 int accmode = 0; 321 322 /* We don't know the target directory, and therefore can not 323 * set the change info 324 */ 325 326 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 327 328 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 329 330 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 331 (open->op_iattr.ia_size == 0); 332 /* 333 * In the delegation case, the client is telling us about an 334 * open that it *already* performed locally, some time ago. We 335 * should let it succeed now if possible. 336 * 337 * In the case of a CLAIM_FH open, on the other hand, the client 338 * may be counting on us to enforce permissions (the Linux 4.1 339 * client uses this for normal opens, for example). 340 */ 341 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 342 accmode = NFSD_MAY_OWNER_OVERRIDE; 343 344 status = do_open_permission(rqstp, current_fh, open, accmode); 345 346 return status; 347 } 348 349 static void 350 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 351 { 352 struct nfsd4_sessionid *sid = 353 (struct nfsd4_sessionid *)session->se_sessionid.data; 354 355 clid->cl_boot = sid->clientid.cl_boot; 356 clid->cl_id = sid->clientid.cl_id; 357 } 358 359 static __be32 360 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 361 struct nfsd4_open *open) 362 { 363 __be32 status; 364 struct svc_fh *resfh = NULL; 365 struct net *net = SVC_NET(rqstp); 366 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 367 368 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 369 (int)open->op_fname.len, open->op_fname.data, 370 open->op_openowner); 371 372 /* This check required by spec. */ 373 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 374 return nfserr_inval; 375 376 open->op_created = 0; 377 /* 378 * RFC5661 18.51.3 379 * Before RECLAIM_COMPLETE done, server should deny new lock 380 */ 381 if (nfsd4_has_session(cstate) && 382 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 383 &cstate->session->se_client->cl_flags) && 384 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 385 return nfserr_grace; 386 387 if (nfsd4_has_session(cstate)) 388 copy_clientid(&open->op_clientid, cstate->session); 389 390 /* check seqid for replay. set nfs4_owner */ 391 status = nfsd4_process_open1(cstate, open, nn); 392 if (status == nfserr_replay_me) { 393 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 394 fh_put(&cstate->current_fh); 395 fh_copy_shallow(&cstate->current_fh.fh_handle, 396 &rp->rp_openfh); 397 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 398 if (status) 399 dprintk("nfsd4_open: replay failed" 400 " restoring previous filehandle\n"); 401 else 402 status = nfserr_replay_me; 403 } 404 if (status) 405 goto out; 406 if (open->op_xdr_error) { 407 status = open->op_xdr_error; 408 goto out; 409 } 410 411 status = nfsd4_check_open_attributes(rqstp, cstate, open); 412 if (status) 413 goto out; 414 415 /* Openowner is now set, so sequence id will get bumped. Now we need 416 * these checks before we do any creates: */ 417 status = nfserr_grace; 418 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 419 goto out; 420 status = nfserr_no_grace; 421 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 422 goto out; 423 424 switch (open->op_claim_type) { 425 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 426 case NFS4_OPEN_CLAIM_NULL: 427 status = do_open_lookup(rqstp, cstate, open, &resfh); 428 if (status) 429 goto out; 430 break; 431 case NFS4_OPEN_CLAIM_PREVIOUS: 432 status = nfs4_check_open_reclaim(&open->op_clientid, 433 cstate, nn); 434 if (status) 435 goto out; 436 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 437 case NFS4_OPEN_CLAIM_FH: 438 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 439 status = do_open_fhandle(rqstp, cstate, open); 440 if (status) 441 goto out; 442 resfh = &cstate->current_fh; 443 break; 444 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 445 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 446 dprintk("NFSD: unsupported OPEN claim type %d\n", 447 open->op_claim_type); 448 status = nfserr_notsupp; 449 goto out; 450 default: 451 dprintk("NFSD: Invalid OPEN claim type %d\n", 452 open->op_claim_type); 453 status = nfserr_inval; 454 goto out; 455 } 456 /* 457 * nfsd4_process_open2() does the actual opening of the file. If 458 * successful, it (1) truncates the file if open->op_truncate was 459 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 460 */ 461 status = nfsd4_process_open2(rqstp, resfh, open); 462 WARN(status && open->op_created, 463 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 464 be32_to_cpu(status)); 465 out: 466 if (resfh && resfh != &cstate->current_fh) { 467 fh_dup2(&cstate->current_fh, resfh); 468 fh_put(resfh); 469 kfree(resfh); 470 } 471 nfsd4_cleanup_open_state(cstate, open); 472 nfsd4_bump_seqid(cstate, status); 473 return status; 474 } 475 476 /* 477 * OPEN is the only seqid-mutating operation whose decoding can fail 478 * with a seqid-mutating error (specifically, decoding of user names in 479 * the attributes). Therefore we have to do some processing to look up 480 * the stateowner so that we can bump the seqid. 481 */ 482 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 483 { 484 struct nfsd4_open *open = (struct nfsd4_open *)&op->u; 485 486 if (!seqid_mutating_err(ntohl(op->status))) 487 return op->status; 488 if (nfsd4_has_session(cstate)) 489 return op->status; 490 open->op_xdr_error = op->status; 491 return nfsd4_open(rqstp, cstate, open); 492 } 493 494 /* 495 * filehandle-manipulating ops. 496 */ 497 static __be32 498 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 499 struct svc_fh **getfh) 500 { 501 if (!cstate->current_fh.fh_dentry) 502 return nfserr_nofilehandle; 503 504 *getfh = &cstate->current_fh; 505 return nfs_ok; 506 } 507 508 static __be32 509 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 510 struct nfsd4_putfh *putfh) 511 { 512 fh_put(&cstate->current_fh); 513 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 514 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 515 putfh->pf_fhlen); 516 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 517 } 518 519 static __be32 520 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 521 void *arg) 522 { 523 __be32 status; 524 525 fh_put(&cstate->current_fh); 526 status = exp_pseudoroot(rqstp, &cstate->current_fh); 527 return status; 528 } 529 530 static __be32 531 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 532 void *arg) 533 { 534 if (!cstate->save_fh.fh_dentry) 535 return nfserr_restorefh; 536 537 fh_dup2(&cstate->current_fh, &cstate->save_fh); 538 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 539 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 540 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 541 } 542 return nfs_ok; 543 } 544 545 static __be32 546 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 547 void *arg) 548 { 549 if (!cstate->current_fh.fh_dentry) 550 return nfserr_nofilehandle; 551 552 fh_dup2(&cstate->save_fh, &cstate->current_fh); 553 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 554 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 555 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 556 } 557 return nfs_ok; 558 } 559 560 /* 561 * misc nfsv4 ops 562 */ 563 static __be32 564 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 565 struct nfsd4_access *access) 566 { 567 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 568 return nfserr_inval; 569 570 access->ac_resp_access = access->ac_req_access; 571 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 572 &access->ac_supported); 573 } 574 575 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 576 { 577 __be32 verf[2]; 578 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 579 580 /* 581 * This is opaque to client, so no need to byte-swap. Use 582 * __force to keep sparse happy 583 */ 584 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec; 585 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec; 586 memcpy(verifier->data, verf, sizeof(verifier->data)); 587 } 588 589 static __be32 590 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 591 struct nfsd4_commit *commit) 592 { 593 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 594 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 595 commit->co_count); 596 } 597 598 static __be32 599 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 600 struct nfsd4_create *create) 601 { 602 struct svc_fh resfh; 603 __be32 status; 604 dev_t rdev; 605 606 fh_init(&resfh, NFS4_FHSIZE); 607 608 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 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, &cstate->current_fh, 778 &read->rd_stateid, RD_STATE, 779 &read->rd_filp, &read->rd_tmp_file); 780 if (status) { 781 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 782 goto out; 783 } 784 status = nfs_ok; 785 out: 786 read->rd_rqstp = rqstp; 787 read->rd_fhp = &cstate->current_fh; 788 return status; 789 } 790 791 static __be32 792 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 793 struct nfsd4_readdir *readdir) 794 { 795 u64 cookie = readdir->rd_cookie; 796 static const nfs4_verifier zeroverf; 797 798 /* no need to check permission - this will be done in nfsd_readdir() */ 799 800 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 801 return nfserr_inval; 802 803 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 804 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 805 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 806 807 if ((cookie == 1) || (cookie == 2) || 808 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 809 return nfserr_bad_cookie; 810 811 readdir->rd_rqstp = rqstp; 812 readdir->rd_fhp = &cstate->current_fh; 813 return nfs_ok; 814 } 815 816 static __be32 817 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 818 struct nfsd4_readlink *readlink) 819 { 820 readlink->rl_rqstp = rqstp; 821 readlink->rl_fhp = &cstate->current_fh; 822 return nfs_ok; 823 } 824 825 static __be32 826 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 827 struct nfsd4_remove *remove) 828 { 829 __be32 status; 830 831 if (opens_in_grace(SVC_NET(rqstp))) 832 return nfserr_grace; 833 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 834 remove->rm_name, remove->rm_namelen); 835 if (!status) { 836 fh_unlock(&cstate->current_fh); 837 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 838 } 839 return status; 840 } 841 842 static __be32 843 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 844 struct nfsd4_rename *rename) 845 { 846 __be32 status = nfserr_nofilehandle; 847 848 if (!cstate->save_fh.fh_dentry) 849 return status; 850 if (opens_in_grace(SVC_NET(rqstp)) && 851 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 852 return nfserr_grace; 853 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 854 rename->rn_snamelen, &cstate->current_fh, 855 rename->rn_tname, rename->rn_tnamelen); 856 if (status) 857 return status; 858 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 859 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 860 return nfs_ok; 861 } 862 863 static __be32 864 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 865 struct nfsd4_secinfo *secinfo) 866 { 867 struct svc_export *exp; 868 struct dentry *dentry; 869 __be32 err; 870 871 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 872 if (err) 873 return err; 874 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 875 secinfo->si_name, secinfo->si_namelen, 876 &exp, &dentry); 877 if (err) 878 return err; 879 fh_unlock(&cstate->current_fh); 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 &cstate->current_fh, &setattr->sa_stateid, 925 WR_STATE, NULL, NULL); 926 if (status) { 927 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 928 return status; 929 } 930 } 931 err = fh_want_write(&cstate->current_fh); 932 if (err) 933 return nfserrno(err); 934 status = nfs_ok; 935 936 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 937 nfsd_attrmask); 938 if (status) 939 goto out; 940 941 if (setattr->sa_acl != NULL) 942 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 943 setattr->sa_acl); 944 if (status) 945 goto out; 946 if (setattr->sa_label.len) 947 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 948 &setattr->sa_label); 949 if (status) 950 goto out; 951 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 952 0, (time_t)0); 953 out: 954 fh_drop_write(&cstate->current_fh); 955 return status; 956 } 957 958 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 959 { 960 int i = 1; 961 int buflen = write->wr_buflen; 962 963 vec[0].iov_base = write->wr_head.iov_base; 964 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 965 buflen -= vec[0].iov_len; 966 967 while (buflen) { 968 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 969 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 970 buflen -= vec[i].iov_len; 971 i++; 972 } 973 return i; 974 } 975 976 static __be32 977 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 978 struct nfsd4_write *write) 979 { 980 stateid_t *stateid = &write->wr_stateid; 981 struct file *filp = NULL; 982 __be32 status = nfs_ok; 983 unsigned long cnt; 984 int nvecs; 985 986 if (write->wr_offset >= OFFSET_MAX) 987 return nfserr_inval; 988 989 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 990 stateid, WR_STATE, &filp, NULL); 991 if (status) { 992 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 993 return status; 994 } 995 996 cnt = write->wr_buflen; 997 write->wr_how_written = write->wr_stable_how; 998 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 999 1000 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1001 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1002 1003 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp, 1004 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 1005 &write->wr_how_written); 1006 fput(filp); 1007 1008 write->wr_bytes_written = cnt; 1009 1010 return status; 1011 } 1012 1013 static __be32 1014 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1015 struct nfsd4_clone *clone) 1016 { 1017 struct file *src, *dst; 1018 __be32 status; 1019 1020 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, 1021 &clone->cl_src_stateid, RD_STATE, 1022 &src, NULL); 1023 if (status) { 1024 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); 1025 goto out; 1026 } 1027 1028 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1029 &clone->cl_dst_stateid, WR_STATE, 1030 &dst, NULL); 1031 if (status) { 1032 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); 1033 goto out_put_src; 1034 } 1035 1036 /* fix up for NFS-specific error code */ 1037 if (!S_ISREG(file_inode(src)->i_mode) || 1038 !S_ISREG(file_inode(dst)->i_mode)) { 1039 status = nfserr_wrong_type; 1040 goto out_put_dst; 1041 } 1042 1043 status = nfsd4_clone_file_range(src, clone->cl_src_pos, 1044 dst, clone->cl_dst_pos, clone->cl_count); 1045 1046 out_put_dst: 1047 fput(dst); 1048 out_put_src: 1049 fput(src); 1050 out: 1051 return status; 1052 } 1053 1054 static __be32 1055 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1056 struct nfsd4_fallocate *fallocate, int flags) 1057 { 1058 __be32 status = nfserr_notsupp; 1059 struct file *file; 1060 1061 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1062 &fallocate->falloc_stateid, 1063 WR_STATE, &file, NULL); 1064 if (status != nfs_ok) { 1065 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1066 return status; 1067 } 1068 1069 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file, 1070 fallocate->falloc_offset, 1071 fallocate->falloc_length, 1072 flags); 1073 fput(file); 1074 return status; 1075 } 1076 1077 static __be32 1078 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1079 struct nfsd4_fallocate *fallocate) 1080 { 1081 return nfsd4_fallocate(rqstp, cstate, fallocate, 0); 1082 } 1083 1084 static __be32 1085 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1086 struct nfsd4_fallocate *fallocate) 1087 { 1088 return nfsd4_fallocate(rqstp, cstate, fallocate, 1089 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1090 } 1091 1092 static __be32 1093 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1094 struct nfsd4_seek *seek) 1095 { 1096 int whence; 1097 __be32 status; 1098 struct file *file; 1099 1100 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1101 &seek->seek_stateid, 1102 RD_STATE, &file, NULL); 1103 if (status) { 1104 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1105 return status; 1106 } 1107 1108 switch (seek->seek_whence) { 1109 case NFS4_CONTENT_DATA: 1110 whence = SEEK_DATA; 1111 break; 1112 case NFS4_CONTENT_HOLE: 1113 whence = SEEK_HOLE; 1114 break; 1115 default: 1116 status = nfserr_union_notsupp; 1117 goto out; 1118 } 1119 1120 /* 1121 * Note: This call does change file->f_pos, but nothing in NFSD 1122 * should ever file->f_pos. 1123 */ 1124 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); 1125 if (seek->seek_pos < 0) 1126 status = nfserrno(seek->seek_pos); 1127 else if (seek->seek_pos >= i_size_read(file_inode(file))) 1128 seek->seek_eof = true; 1129 1130 out: 1131 fput(file); 1132 return status; 1133 } 1134 1135 /* This routine never returns NFS_OK! If there are no other errors, it 1136 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1137 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1138 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1139 */ 1140 static __be32 1141 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1142 struct nfsd4_verify *verify) 1143 { 1144 __be32 *buf, *p; 1145 int count; 1146 __be32 status; 1147 1148 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1149 if (status) 1150 return status; 1151 1152 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1153 if (status) 1154 return status; 1155 1156 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1157 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1158 return nfserr_inval; 1159 if (verify->ve_attrlen & 3) 1160 return nfserr_inval; 1161 1162 /* count in words: 1163 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1164 */ 1165 count = 4 + (verify->ve_attrlen >> 2); 1166 buf = kmalloc(count << 2, GFP_KERNEL); 1167 if (!buf) 1168 return nfserr_jukebox; 1169 1170 p = buf; 1171 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1172 cstate->current_fh.fh_export, 1173 cstate->current_fh.fh_dentry, 1174 verify->ve_bmval, 1175 rqstp, 0); 1176 /* 1177 * If nfsd4_encode_fattr() ran out of space, assume that's because 1178 * the attributes are longer (hence different) than those given: 1179 */ 1180 if (status == nfserr_resource) 1181 status = nfserr_not_same; 1182 if (status) 1183 goto out_kfree; 1184 1185 /* skip bitmap */ 1186 p = buf + 1 + ntohl(buf[0]); 1187 status = nfserr_not_same; 1188 if (ntohl(*p++) != verify->ve_attrlen) 1189 goto out_kfree; 1190 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1191 status = nfserr_same; 1192 1193 out_kfree: 1194 kfree(buf); 1195 return status; 1196 } 1197 1198 static __be32 1199 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1200 struct nfsd4_verify *verify) 1201 { 1202 __be32 status; 1203 1204 status = _nfsd4_verify(rqstp, cstate, verify); 1205 return status == nfserr_not_same ? nfs_ok : status; 1206 } 1207 1208 static __be32 1209 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1210 struct nfsd4_verify *verify) 1211 { 1212 __be32 status; 1213 1214 status = _nfsd4_verify(rqstp, cstate, verify); 1215 return status == nfserr_same ? nfs_ok : status; 1216 } 1217 1218 #ifdef CONFIG_NFSD_PNFS 1219 static const struct nfsd4_layout_ops * 1220 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1221 { 1222 if (!exp->ex_layout_type) { 1223 dprintk("%s: export does not support pNFS\n", __func__); 1224 return NULL; 1225 } 1226 1227 if (exp->ex_layout_type != layout_type) { 1228 dprintk("%s: layout type %d not supported\n", 1229 __func__, layout_type); 1230 return NULL; 1231 } 1232 1233 return nfsd4_layout_ops[layout_type]; 1234 } 1235 1236 static __be32 1237 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1238 struct nfsd4_compound_state *cstate, 1239 struct nfsd4_getdeviceinfo *gdp) 1240 { 1241 const struct nfsd4_layout_ops *ops; 1242 struct nfsd4_deviceid_map *map; 1243 struct svc_export *exp; 1244 __be32 nfserr; 1245 1246 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1247 __func__, 1248 gdp->gd_layout_type, 1249 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1250 gdp->gd_maxcount); 1251 1252 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1253 if (!map) { 1254 dprintk("%s: couldn't find device ID to export mapping!\n", 1255 __func__); 1256 return nfserr_noent; 1257 } 1258 1259 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1260 if (IS_ERR(exp)) { 1261 dprintk("%s: could not find device id\n", __func__); 1262 return nfserr_noent; 1263 } 1264 1265 nfserr = nfserr_layoutunavailable; 1266 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1267 if (!ops) 1268 goto out; 1269 1270 nfserr = nfs_ok; 1271 if (gdp->gd_maxcount != 0) { 1272 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1273 cstate->session->se_client, gdp); 1274 } 1275 1276 gdp->gd_notify_types &= ops->notify_types; 1277 out: 1278 exp_put(exp); 1279 return nfserr; 1280 } 1281 1282 static __be32 1283 nfsd4_layoutget(struct svc_rqst *rqstp, 1284 struct nfsd4_compound_state *cstate, 1285 struct nfsd4_layoutget *lgp) 1286 { 1287 struct svc_fh *current_fh = &cstate->current_fh; 1288 const struct nfsd4_layout_ops *ops; 1289 struct nfs4_layout_stateid *ls; 1290 __be32 nfserr; 1291 int accmode; 1292 1293 switch (lgp->lg_seg.iomode) { 1294 case IOMODE_READ: 1295 accmode = NFSD_MAY_READ; 1296 break; 1297 case IOMODE_RW: 1298 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE; 1299 break; 1300 default: 1301 dprintk("%s: invalid iomode %d\n", 1302 __func__, lgp->lg_seg.iomode); 1303 nfserr = nfserr_badiomode; 1304 goto out; 1305 } 1306 1307 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1308 if (nfserr) 1309 goto out; 1310 1311 nfserr = nfserr_layoutunavailable; 1312 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1313 if (!ops) 1314 goto out; 1315 1316 /* 1317 * Verify minlength and range as per RFC5661: 1318 * o If loga_length is less than loga_minlength, 1319 * the metadata server MUST return NFS4ERR_INVAL. 1320 * o If the sum of loga_offset and loga_minlength exceeds 1321 * NFS4_UINT64_MAX, and loga_minlength is not 1322 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1323 * o If the sum of loga_offset and loga_length exceeds 1324 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1325 * the error NFS4ERR_INVAL MUST result. 1326 */ 1327 nfserr = nfserr_inval; 1328 if (lgp->lg_seg.length < lgp->lg_minlength || 1329 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1330 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1331 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1332 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1333 goto out; 1334 if (lgp->lg_seg.length == 0) 1335 goto out; 1336 1337 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1338 true, lgp->lg_layout_type, &ls); 1339 if (nfserr) { 1340 trace_layout_get_lookup_fail(&lgp->lg_sid); 1341 goto out; 1342 } 1343 1344 nfserr = nfserr_recallconflict; 1345 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1346 goto out_put_stid; 1347 1348 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1349 current_fh, lgp); 1350 if (nfserr) 1351 goto out_put_stid; 1352 1353 nfserr = nfsd4_insert_layout(lgp, ls); 1354 1355 out_put_stid: 1356 mutex_unlock(&ls->ls_mutex); 1357 nfs4_put_stid(&ls->ls_stid); 1358 out: 1359 return nfserr; 1360 } 1361 1362 static __be32 1363 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1364 struct nfsd4_compound_state *cstate, 1365 struct nfsd4_layoutcommit *lcp) 1366 { 1367 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1368 struct svc_fh *current_fh = &cstate->current_fh; 1369 const struct nfsd4_layout_ops *ops; 1370 loff_t new_size = lcp->lc_last_wr + 1; 1371 struct inode *inode; 1372 struct nfs4_layout_stateid *ls; 1373 __be32 nfserr; 1374 1375 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 1376 if (nfserr) 1377 goto out; 1378 1379 nfserr = nfserr_layoutunavailable; 1380 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 1381 if (!ops) 1382 goto out; 1383 inode = d_inode(current_fh->fh_dentry); 1384 1385 nfserr = nfserr_inval; 1386 if (new_size <= seg->offset) { 1387 dprintk("pnfsd: last write before layout segment\n"); 1388 goto out; 1389 } 1390 if (new_size > seg->offset + seg->length) { 1391 dprintk("pnfsd: last write beyond layout segment\n"); 1392 goto out; 1393 } 1394 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 1395 dprintk("pnfsd: layoutcommit beyond EOF\n"); 1396 goto out; 1397 } 1398 1399 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 1400 false, lcp->lc_layout_type, 1401 &ls); 1402 if (nfserr) { 1403 trace_layout_commit_lookup_fail(&lcp->lc_sid); 1404 /* fixup error code as per RFC5661 */ 1405 if (nfserr == nfserr_bad_stateid) 1406 nfserr = nfserr_badlayout; 1407 goto out; 1408 } 1409 1410 /* LAYOUTCOMMIT does not require any serialization */ 1411 mutex_unlock(&ls->ls_mutex); 1412 1413 if (new_size > i_size_read(inode)) { 1414 lcp->lc_size_chg = 1; 1415 lcp->lc_newsize = new_size; 1416 } else { 1417 lcp->lc_size_chg = 0; 1418 } 1419 1420 nfserr = ops->proc_layoutcommit(inode, lcp); 1421 nfs4_put_stid(&ls->ls_stid); 1422 out: 1423 return nfserr; 1424 } 1425 1426 static __be32 1427 nfsd4_layoutreturn(struct svc_rqst *rqstp, 1428 struct nfsd4_compound_state *cstate, 1429 struct nfsd4_layoutreturn *lrp) 1430 { 1431 struct svc_fh *current_fh = &cstate->current_fh; 1432 __be32 nfserr; 1433 1434 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 1435 if (nfserr) 1436 goto out; 1437 1438 nfserr = nfserr_layoutunavailable; 1439 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 1440 goto out; 1441 1442 switch (lrp->lr_seg.iomode) { 1443 case IOMODE_READ: 1444 case IOMODE_RW: 1445 case IOMODE_ANY: 1446 break; 1447 default: 1448 dprintk("%s: invalid iomode %d\n", __func__, 1449 lrp->lr_seg.iomode); 1450 nfserr = nfserr_inval; 1451 goto out; 1452 } 1453 1454 switch (lrp->lr_return_type) { 1455 case RETURN_FILE: 1456 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 1457 break; 1458 case RETURN_FSID: 1459 case RETURN_ALL: 1460 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 1461 break; 1462 default: 1463 dprintk("%s: invalid return_type %d\n", __func__, 1464 lrp->lr_return_type); 1465 nfserr = nfserr_inval; 1466 break; 1467 } 1468 out: 1469 return nfserr; 1470 } 1471 #endif /* CONFIG_NFSD_PNFS */ 1472 1473 /* 1474 * NULL call. 1475 */ 1476 static __be32 1477 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1478 { 1479 return nfs_ok; 1480 } 1481 1482 static inline void nfsd4_increment_op_stats(u32 opnum) 1483 { 1484 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1485 nfsdstats.nfs4_opcount[opnum]++; 1486 } 1487 1488 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1489 void *); 1490 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1491 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1492 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1493 1494 enum nfsd4_op_flags { 1495 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1496 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1497 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1498 /* For rfc 5661 section 2.6.3.1.1: */ 1499 OP_HANDLES_WRONGSEC = 1 << 3, 1500 OP_IS_PUTFH_LIKE = 1 << 4, 1501 /* 1502 * These are the ops whose result size we estimate before 1503 * encoding, to avoid performing an op then not being able to 1504 * respond or cache a response. This includes writes and setattrs 1505 * as well as the operations usually called "nonidempotent": 1506 */ 1507 OP_MODIFIES_SOMETHING = 1 << 5, 1508 /* 1509 * Cache compounds containing these ops in the xid-based drc: 1510 * We use the DRC for compounds containing non-idempotent 1511 * operations, *except* those that are 4.1-specific (since 1512 * sessions provide their own EOS), and except for stateful 1513 * operations other than setclientid and setclientid_confirm 1514 * (since sequence numbers provide EOS for open, lock, etc in 1515 * the v4.0 case). 1516 */ 1517 OP_CACHEME = 1 << 6, 1518 /* 1519 * These are ops which clear current state id. 1520 */ 1521 OP_CLEAR_STATEID = 1 << 7, 1522 }; 1523 1524 struct nfsd4_operation { 1525 nfsd4op_func op_func; 1526 u32 op_flags; 1527 char *op_name; 1528 /* Try to get response size before operation */ 1529 nfsd4op_rsize op_rsize_bop; 1530 stateid_getter op_get_currentstateid; 1531 stateid_setter op_set_currentstateid; 1532 }; 1533 1534 static struct nfsd4_operation nfsd4_ops[]; 1535 1536 static const char *nfsd4_op_name(unsigned opnum); 1537 1538 /* 1539 * Enforce NFSv4.1 COMPOUND ordering rules: 1540 * 1541 * Also note, enforced elsewhere: 1542 * - SEQUENCE other than as first op results in 1543 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1544 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1545 * (Enforced in nfsd4_bind_conn_to_session().) 1546 * - DESTROY_SESSION must be the final operation in a compound, if 1547 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1548 * (Enforced in nfsd4_destroy_session().) 1549 */ 1550 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1551 { 1552 struct nfsd4_op *op = &args->ops[0]; 1553 1554 /* These ordering requirements don't apply to NFSv4.0: */ 1555 if (args->minorversion == 0) 1556 return nfs_ok; 1557 /* This is weird, but OK, not our problem: */ 1558 if (args->opcnt == 0) 1559 return nfs_ok; 1560 if (op->status == nfserr_op_illegal) 1561 return nfs_ok; 1562 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1563 return nfserr_op_not_in_session; 1564 if (op->opnum == OP_SEQUENCE) 1565 return nfs_ok; 1566 if (args->opcnt != 1) 1567 return nfserr_not_only_op; 1568 return nfs_ok; 1569 } 1570 1571 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1572 { 1573 return &nfsd4_ops[op->opnum]; 1574 } 1575 1576 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1577 { 1578 if (op->opnum == OP_ILLEGAL) 1579 return false; 1580 return OPDESC(op)->op_flags & OP_CACHEME; 1581 } 1582 1583 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1584 { 1585 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1586 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1587 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1588 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1589 struct nfsd4_operation *thisd; 1590 struct nfsd4_operation *nextd; 1591 1592 thisd = OPDESC(this); 1593 /* 1594 * Most ops check wronsec on our own; only the putfh-like ops 1595 * have special rules. 1596 */ 1597 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1598 return false; 1599 /* 1600 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1601 * put-filehandle operation if we're not going to use the 1602 * result: 1603 */ 1604 if (argp->opcnt == resp->opcnt) 1605 return false; 1606 if (next->opnum == OP_ILLEGAL) 1607 return false; 1608 nextd = OPDESC(next); 1609 /* 1610 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1611 * errors themselves as necessary; others should check for them 1612 * now: 1613 */ 1614 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1615 } 1616 1617 static void svcxdr_init_encode(struct svc_rqst *rqstp, 1618 struct nfsd4_compoundres *resp) 1619 { 1620 struct xdr_stream *xdr = &resp->xdr; 1621 struct xdr_buf *buf = &rqstp->rq_res; 1622 struct kvec *head = buf->head; 1623 1624 xdr->buf = buf; 1625 xdr->iov = head; 1626 xdr->p = head->iov_base + head->iov_len; 1627 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1628 /* Tail and page_len should be zero at this point: */ 1629 buf->len = buf->head[0].iov_len; 1630 xdr->scratch.iov_len = 0; 1631 xdr->page_ptr = buf->pages - 1; 1632 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1633 - rqstp->rq_auth_slack; 1634 } 1635 1636 /* 1637 * COMPOUND call. 1638 */ 1639 static __be32 1640 nfsd4_proc_compound(struct svc_rqst *rqstp, 1641 struct nfsd4_compoundargs *args, 1642 struct nfsd4_compoundres *resp) 1643 { 1644 struct nfsd4_op *op; 1645 struct nfsd4_operation *opdesc; 1646 struct nfsd4_compound_state *cstate = &resp->cstate; 1647 struct svc_fh *current_fh = &cstate->current_fh; 1648 struct svc_fh *save_fh = &cstate->save_fh; 1649 __be32 status; 1650 1651 svcxdr_init_encode(rqstp, resp); 1652 resp->tagp = resp->xdr.p; 1653 /* reserve space for: taglen, tag, and opcnt */ 1654 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1655 resp->taglen = args->taglen; 1656 resp->tag = args->tag; 1657 resp->rqstp = rqstp; 1658 cstate->minorversion = args->minorversion; 1659 fh_init(current_fh, NFS4_FHSIZE); 1660 fh_init(save_fh, NFS4_FHSIZE); 1661 /* 1662 * Don't use the deferral mechanism for NFSv4; compounds make it 1663 * too hard to avoid non-idempotency problems. 1664 */ 1665 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1666 1667 /* 1668 * According to RFC3010, this takes precedence over all other errors. 1669 */ 1670 status = nfserr_minor_vers_mismatch; 1671 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1672 goto out; 1673 1674 status = nfs41_check_op_ordering(args); 1675 if (status) { 1676 op = &args->ops[0]; 1677 op->status = status; 1678 goto encode_op; 1679 } 1680 1681 while (!status && resp->opcnt < args->opcnt) { 1682 op = &args->ops[resp->opcnt++]; 1683 1684 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1685 resp->opcnt, args->opcnt, op->opnum, 1686 nfsd4_op_name(op->opnum)); 1687 /* 1688 * The XDR decode routines may have pre-set op->status; 1689 * for example, if there is a miscellaneous XDR error 1690 * it will be set to nfserr_bad_xdr. 1691 */ 1692 if (op->status) { 1693 if (op->opnum == OP_OPEN) 1694 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1695 goto encode_op; 1696 } 1697 1698 opdesc = OPDESC(op); 1699 1700 if (!current_fh->fh_dentry) { 1701 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1702 op->status = nfserr_nofilehandle; 1703 goto encode_op; 1704 } 1705 } else if (current_fh->fh_export->ex_fslocs.migrated && 1706 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1707 op->status = nfserr_moved; 1708 goto encode_op; 1709 } 1710 1711 fh_clear_wcc(current_fh); 1712 1713 /* If op is non-idempotent */ 1714 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1715 /* 1716 * Don't execute this op if we couldn't encode a 1717 * succesful reply: 1718 */ 1719 u32 plen = opdesc->op_rsize_bop(rqstp, op); 1720 /* 1721 * Plus if there's another operation, make sure 1722 * we'll have space to at least encode an error: 1723 */ 1724 if (resp->opcnt < args->opcnt) 1725 plen += COMPOUND_ERR_SLACK_SPACE; 1726 op->status = nfsd4_check_resp_size(resp, plen); 1727 } 1728 1729 if (op->status) 1730 goto encode_op; 1731 1732 if (opdesc->op_get_currentstateid) 1733 opdesc->op_get_currentstateid(cstate, &op->u); 1734 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1735 1736 if (!op->status) { 1737 if (opdesc->op_set_currentstateid) 1738 opdesc->op_set_currentstateid(cstate, &op->u); 1739 1740 if (opdesc->op_flags & OP_CLEAR_STATEID) 1741 clear_current_stateid(cstate); 1742 1743 if (need_wrongsec_check(rqstp)) 1744 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 1745 } 1746 1747 encode_op: 1748 /* Only from SEQUENCE */ 1749 if (cstate->status == nfserr_replay_cache) { 1750 dprintk("%s NFS4.1 replay from cache\n", __func__); 1751 status = op->status; 1752 goto out; 1753 } 1754 if (op->status == nfserr_replay_me) { 1755 op->replay = &cstate->replay_owner->so_replay; 1756 nfsd4_encode_replay(&resp->xdr, op); 1757 status = op->status = op->replay->rp_status; 1758 } else { 1759 nfsd4_encode_operation(resp, op); 1760 status = op->status; 1761 } 1762 1763 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1764 args->ops, args->opcnt, resp->opcnt, op->opnum, 1765 be32_to_cpu(status)); 1766 1767 nfsd4_cstate_clear_replay(cstate); 1768 nfsd4_increment_op_stats(op->opnum); 1769 } 1770 1771 cstate->status = status; 1772 fh_put(current_fh); 1773 fh_put(save_fh); 1774 BUG_ON(cstate->replay_owner); 1775 out: 1776 /* Reset deferral mechanism for RPC deferrals */ 1777 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1778 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1779 return status; 1780 } 1781 1782 #define op_encode_hdr_size (2) 1783 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1784 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1785 #define op_encode_change_info_maxsz (5) 1786 #define nfs4_fattr_bitmap_maxsz (4) 1787 1788 /* We'll fall back on returning no lockowner if run out of space: */ 1789 #define op_encode_lockowner_maxsz (0) 1790 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1791 1792 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1793 1794 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1795 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1796 op_encode_ace_maxsz) 1797 1798 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1799 1800 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1801 { 1802 return (op_encode_hdr_size) * sizeof(__be32); 1803 } 1804 1805 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1806 { 1807 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1808 } 1809 1810 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1811 { 1812 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1813 } 1814 1815 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1816 { 1817 return (op_encode_hdr_size + op_encode_change_info_maxsz 1818 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1819 } 1820 1821 /* 1822 * Note since this is an idempotent operation we won't insist on failing 1823 * the op prematurely if the estimate is too large. We may turn off splice 1824 * reads unnecessarily. 1825 */ 1826 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1827 struct nfsd4_op *op) 1828 { 1829 u32 *bmap = op->u.getattr.ga_bmval; 1830 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1831 u32 ret = 0; 1832 1833 if (bmap0 & FATTR4_WORD0_ACL) 1834 return svc_max_payload(rqstp); 1835 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1836 return svc_max_payload(rqstp); 1837 1838 if (bmap1 & FATTR4_WORD1_OWNER) { 1839 ret += IDMAP_NAMESZ + 4; 1840 bmap1 &= ~FATTR4_WORD1_OWNER; 1841 } 1842 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1843 ret += IDMAP_NAMESZ + 4; 1844 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1845 } 1846 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1847 ret += NFS4_FHSIZE + 4; 1848 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1849 } 1850 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1851 ret += NFS4_MAXLABELLEN + 12; 1852 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1853 } 1854 /* 1855 * Largest of remaining attributes are 16 bytes (e.g., 1856 * supported_attributes) 1857 */ 1858 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1859 /* bitmask, length */ 1860 ret += 20; 1861 return ret; 1862 } 1863 1864 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1865 { 1866 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1867 * sizeof(__be32); 1868 } 1869 1870 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1871 { 1872 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1873 * sizeof(__be32); 1874 } 1875 1876 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1877 { 1878 return (op_encode_hdr_size + op_encode_stateid_maxsz 1879 + op_encode_change_info_maxsz + 1 1880 + nfs4_fattr_bitmap_maxsz 1881 + op_encode_delegation_maxsz) * sizeof(__be32); 1882 } 1883 1884 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1885 { 1886 u32 maxcount = 0, rlen = 0; 1887 1888 maxcount = svc_max_payload(rqstp); 1889 rlen = min(op->u.read.rd_length, maxcount); 1890 1891 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1892 } 1893 1894 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1895 { 1896 u32 maxcount = 0, rlen = 0; 1897 1898 maxcount = svc_max_payload(rqstp); 1899 rlen = min(op->u.readdir.rd_maxcount, maxcount); 1900 1901 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1902 XDR_QUADLEN(rlen)) * sizeof(__be32); 1903 } 1904 1905 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1906 { 1907 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1908 * sizeof(__be32); 1909 } 1910 1911 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1912 { 1913 return (op_encode_hdr_size + op_encode_change_info_maxsz 1914 + op_encode_change_info_maxsz) * sizeof(__be32); 1915 } 1916 1917 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1918 struct nfsd4_op *op) 1919 { 1920 return (op_encode_hdr_size 1921 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 1922 } 1923 1924 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1925 { 1926 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1927 } 1928 1929 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1930 { 1931 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1932 sizeof(__be32); 1933 } 1934 1935 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1936 { 1937 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 1938 } 1939 1940 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1941 { 1942 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1943 1 + 1 + /* eir_flags, spr_how */\ 1944 4 + /* spo_must_enforce & _allow with bitmap */\ 1945 2 + /*eir_server_owner.so_minor_id */\ 1946 /* eir_server_owner.so_major_id<> */\ 1947 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1948 /* eir_server_scope<> */\ 1949 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1950 1 + /* eir_server_impl_id array length */\ 1951 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1952 } 1953 1954 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1955 { 1956 return (op_encode_hdr_size + \ 1957 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1958 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1959 } 1960 1961 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1962 { 1963 return (op_encode_hdr_size + \ 1964 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1965 2 + /* csr_sequence, csr_flags */\ 1966 op_encode_channel_attrs_maxsz + \ 1967 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1968 } 1969 1970 #ifdef CONFIG_NFSD_PNFS 1971 /* 1972 * At this stage we don't really know what layout driver will handle the request, 1973 * so we need to define an arbitrary upper bound here. 1974 */ 1975 #define MAX_LAYOUT_SIZE 128 1976 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1977 { 1978 return (op_encode_hdr_size + 1979 1 /* logr_return_on_close */ + 1980 op_encode_stateid_maxsz + 1981 1 /* nr of layouts */ + 1982 MAX_LAYOUT_SIZE) * sizeof(__be32); 1983 } 1984 1985 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1986 { 1987 return (op_encode_hdr_size + 1988 1 /* locr_newsize */ + 1989 2 /* ns_size */) * sizeof(__be32); 1990 } 1991 1992 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1993 { 1994 return (op_encode_hdr_size + 1995 1 /* lrs_stateid */ + 1996 op_encode_stateid_maxsz) * sizeof(__be32); 1997 } 1998 #endif /* CONFIG_NFSD_PNFS */ 1999 2000 static struct nfsd4_operation nfsd4_ops[] = { 2001 [OP_ACCESS] = { 2002 .op_func = (nfsd4op_func)nfsd4_access, 2003 .op_name = "OP_ACCESS", 2004 }, 2005 [OP_CLOSE] = { 2006 .op_func = (nfsd4op_func)nfsd4_close, 2007 .op_flags = OP_MODIFIES_SOMETHING, 2008 .op_name = "OP_CLOSE", 2009 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2010 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 2011 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 2012 }, 2013 [OP_COMMIT] = { 2014 .op_func = (nfsd4op_func)nfsd4_commit, 2015 .op_flags = OP_MODIFIES_SOMETHING, 2016 .op_name = "OP_COMMIT", 2017 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 2018 }, 2019 [OP_CREATE] = { 2020 .op_func = (nfsd4op_func)nfsd4_create, 2021 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2022 .op_name = "OP_CREATE", 2023 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 2024 }, 2025 [OP_DELEGRETURN] = { 2026 .op_func = (nfsd4op_func)nfsd4_delegreturn, 2027 .op_flags = OP_MODIFIES_SOMETHING, 2028 .op_name = "OP_DELEGRETURN", 2029 .op_rsize_bop = nfsd4_only_status_rsize, 2030 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 2031 }, 2032 [OP_GETATTR] = { 2033 .op_func = (nfsd4op_func)nfsd4_getattr, 2034 .op_flags = ALLOWED_ON_ABSENT_FS, 2035 .op_rsize_bop = nfsd4_getattr_rsize, 2036 .op_name = "OP_GETATTR", 2037 }, 2038 [OP_GETFH] = { 2039 .op_func = (nfsd4op_func)nfsd4_getfh, 2040 .op_name = "OP_GETFH", 2041 }, 2042 [OP_LINK] = { 2043 .op_func = (nfsd4op_func)nfsd4_link, 2044 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2045 | OP_CACHEME, 2046 .op_name = "OP_LINK", 2047 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 2048 }, 2049 [OP_LOCK] = { 2050 .op_func = (nfsd4op_func)nfsd4_lock, 2051 .op_flags = OP_MODIFIES_SOMETHING, 2052 .op_name = "OP_LOCK", 2053 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 2054 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 2055 }, 2056 [OP_LOCKT] = { 2057 .op_func = (nfsd4op_func)nfsd4_lockt, 2058 .op_name = "OP_LOCKT", 2059 }, 2060 [OP_LOCKU] = { 2061 .op_func = (nfsd4op_func)nfsd4_locku, 2062 .op_flags = OP_MODIFIES_SOMETHING, 2063 .op_name = "OP_LOCKU", 2064 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2065 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 2066 }, 2067 [OP_LOOKUP] = { 2068 .op_func = (nfsd4op_func)nfsd4_lookup, 2069 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2070 .op_name = "OP_LOOKUP", 2071 }, 2072 [OP_LOOKUPP] = { 2073 .op_func = (nfsd4op_func)nfsd4_lookupp, 2074 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2075 .op_name = "OP_LOOKUPP", 2076 }, 2077 [OP_NVERIFY] = { 2078 .op_func = (nfsd4op_func)nfsd4_nverify, 2079 .op_name = "OP_NVERIFY", 2080 }, 2081 [OP_OPEN] = { 2082 .op_func = (nfsd4op_func)nfsd4_open, 2083 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2084 .op_name = "OP_OPEN", 2085 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 2086 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 2087 }, 2088 [OP_OPEN_CONFIRM] = { 2089 .op_func = (nfsd4op_func)nfsd4_open_confirm, 2090 .op_flags = OP_MODIFIES_SOMETHING, 2091 .op_name = "OP_OPEN_CONFIRM", 2092 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2093 }, 2094 [OP_OPEN_DOWNGRADE] = { 2095 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 2096 .op_flags = OP_MODIFIES_SOMETHING, 2097 .op_name = "OP_OPEN_DOWNGRADE", 2098 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2099 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 2100 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 2101 }, 2102 [OP_PUTFH] = { 2103 .op_func = (nfsd4op_func)nfsd4_putfh, 2104 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2105 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2106 .op_name = "OP_PUTFH", 2107 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2108 }, 2109 [OP_PUTPUBFH] = { 2110 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2111 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2112 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2113 .op_name = "OP_PUTPUBFH", 2114 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2115 }, 2116 [OP_PUTROOTFH] = { 2117 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2118 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2119 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2120 .op_name = "OP_PUTROOTFH", 2121 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2122 }, 2123 [OP_READ] = { 2124 .op_func = (nfsd4op_func)nfsd4_read, 2125 .op_name = "OP_READ", 2126 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 2127 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 2128 }, 2129 [OP_READDIR] = { 2130 .op_func = (nfsd4op_func)nfsd4_readdir, 2131 .op_name = "OP_READDIR", 2132 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 2133 }, 2134 [OP_READLINK] = { 2135 .op_func = (nfsd4op_func)nfsd4_readlink, 2136 .op_name = "OP_READLINK", 2137 }, 2138 [OP_REMOVE] = { 2139 .op_func = (nfsd4op_func)nfsd4_remove, 2140 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2141 .op_name = "OP_REMOVE", 2142 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 2143 }, 2144 [OP_RENAME] = { 2145 .op_func = (nfsd4op_func)nfsd4_rename, 2146 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2147 .op_name = "OP_RENAME", 2148 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 2149 }, 2150 [OP_RENEW] = { 2151 .op_func = (nfsd4op_func)nfsd4_renew, 2152 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2153 | OP_MODIFIES_SOMETHING, 2154 .op_name = "OP_RENEW", 2155 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2156 2157 }, 2158 [OP_RESTOREFH] = { 2159 .op_func = (nfsd4op_func)nfsd4_restorefh, 2160 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2161 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2162 .op_name = "OP_RESTOREFH", 2163 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2164 }, 2165 [OP_SAVEFH] = { 2166 .op_func = (nfsd4op_func)nfsd4_savefh, 2167 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2168 .op_name = "OP_SAVEFH", 2169 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2170 }, 2171 [OP_SECINFO] = { 2172 .op_func = (nfsd4op_func)nfsd4_secinfo, 2173 .op_flags = OP_HANDLES_WRONGSEC, 2174 .op_name = "OP_SECINFO", 2175 }, 2176 [OP_SETATTR] = { 2177 .op_func = (nfsd4op_func)nfsd4_setattr, 2178 .op_name = "OP_SETATTR", 2179 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2180 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 2181 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 2182 }, 2183 [OP_SETCLIENTID] = { 2184 .op_func = (nfsd4op_func)nfsd4_setclientid, 2185 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2186 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2187 .op_name = "OP_SETCLIENTID", 2188 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 2189 }, 2190 [OP_SETCLIENTID_CONFIRM] = { 2191 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 2192 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2193 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2194 .op_name = "OP_SETCLIENTID_CONFIRM", 2195 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2196 }, 2197 [OP_VERIFY] = { 2198 .op_func = (nfsd4op_func)nfsd4_verify, 2199 .op_name = "OP_VERIFY", 2200 }, 2201 [OP_WRITE] = { 2202 .op_func = (nfsd4op_func)nfsd4_write, 2203 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2204 .op_name = "OP_WRITE", 2205 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 2206 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 2207 }, 2208 [OP_RELEASE_LOCKOWNER] = { 2209 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 2210 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2211 | OP_MODIFIES_SOMETHING, 2212 .op_name = "OP_RELEASE_LOCKOWNER", 2213 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2214 }, 2215 2216 /* NFSv4.1 operations */ 2217 [OP_EXCHANGE_ID] = { 2218 .op_func = (nfsd4op_func)nfsd4_exchange_id, 2219 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2220 | OP_MODIFIES_SOMETHING, 2221 .op_name = "OP_EXCHANGE_ID", 2222 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 2223 }, 2224 [OP_BACKCHANNEL_CTL] = { 2225 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 2226 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2227 .op_name = "OP_BACKCHANNEL_CTL", 2228 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2229 }, 2230 [OP_BIND_CONN_TO_SESSION] = { 2231 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 2232 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2233 | OP_MODIFIES_SOMETHING, 2234 .op_name = "OP_BIND_CONN_TO_SESSION", 2235 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 2236 }, 2237 [OP_CREATE_SESSION] = { 2238 .op_func = (nfsd4op_func)nfsd4_create_session, 2239 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2240 | OP_MODIFIES_SOMETHING, 2241 .op_name = "OP_CREATE_SESSION", 2242 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 2243 }, 2244 [OP_DESTROY_SESSION] = { 2245 .op_func = (nfsd4op_func)nfsd4_destroy_session, 2246 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2247 | OP_MODIFIES_SOMETHING, 2248 .op_name = "OP_DESTROY_SESSION", 2249 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2250 }, 2251 [OP_SEQUENCE] = { 2252 .op_func = (nfsd4op_func)nfsd4_sequence, 2253 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 2254 .op_name = "OP_SEQUENCE", 2255 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize, 2256 }, 2257 [OP_DESTROY_CLIENTID] = { 2258 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 2259 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2260 | OP_MODIFIES_SOMETHING, 2261 .op_name = "OP_DESTROY_CLIENTID", 2262 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2263 }, 2264 [OP_RECLAIM_COMPLETE] = { 2265 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 2266 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2267 .op_name = "OP_RECLAIM_COMPLETE", 2268 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2269 }, 2270 [OP_SECINFO_NO_NAME] = { 2271 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 2272 .op_flags = OP_HANDLES_WRONGSEC, 2273 .op_name = "OP_SECINFO_NO_NAME", 2274 }, 2275 [OP_TEST_STATEID] = { 2276 .op_func = (nfsd4op_func)nfsd4_test_stateid, 2277 .op_flags = ALLOWED_WITHOUT_FH, 2278 .op_name = "OP_TEST_STATEID", 2279 }, 2280 [OP_FREE_STATEID] = { 2281 .op_func = (nfsd4op_func)nfsd4_free_stateid, 2282 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2283 .op_name = "OP_FREE_STATEID", 2284 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 2285 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2286 }, 2287 #ifdef CONFIG_NFSD_PNFS 2288 [OP_GETDEVICEINFO] = { 2289 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo, 2290 .op_flags = ALLOWED_WITHOUT_FH, 2291 .op_name = "OP_GETDEVICEINFO", 2292 }, 2293 [OP_LAYOUTGET] = { 2294 .op_func = (nfsd4op_func)nfsd4_layoutget, 2295 .op_flags = OP_MODIFIES_SOMETHING, 2296 .op_name = "OP_LAYOUTGET", 2297 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize, 2298 }, 2299 [OP_LAYOUTCOMMIT] = { 2300 .op_func = (nfsd4op_func)nfsd4_layoutcommit, 2301 .op_flags = OP_MODIFIES_SOMETHING, 2302 .op_name = "OP_LAYOUTCOMMIT", 2303 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize, 2304 }, 2305 [OP_LAYOUTRETURN] = { 2306 .op_func = (nfsd4op_func)nfsd4_layoutreturn, 2307 .op_flags = OP_MODIFIES_SOMETHING, 2308 .op_name = "OP_LAYOUTRETURN", 2309 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize, 2310 }, 2311 #endif /* CONFIG_NFSD_PNFS */ 2312 2313 /* NFSv4.2 operations */ 2314 [OP_ALLOCATE] = { 2315 .op_func = (nfsd4op_func)nfsd4_allocate, 2316 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2317 .op_name = "OP_ALLOCATE", 2318 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2319 }, 2320 [OP_DEALLOCATE] = { 2321 .op_func = (nfsd4op_func)nfsd4_deallocate, 2322 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2323 .op_name = "OP_DEALLOCATE", 2324 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2325 }, 2326 [OP_CLONE] = { 2327 .op_func = (nfsd4op_func)nfsd4_clone, 2328 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2329 .op_name = "OP_CLONE", 2330 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2331 }, 2332 [OP_SEEK] = { 2333 .op_func = (nfsd4op_func)nfsd4_seek, 2334 .op_name = "OP_SEEK", 2335 }, 2336 }; 2337 2338 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 2339 { 2340 struct nfsd4_operation *opdesc; 2341 nfsd4op_rsize estimator; 2342 2343 if (op->opnum == OP_ILLEGAL) 2344 return op_encode_hdr_size * sizeof(__be32); 2345 opdesc = OPDESC(op); 2346 estimator = opdesc->op_rsize_bop; 2347 return estimator ? estimator(rqstp, op) : PAGE_SIZE; 2348 } 2349 2350 void warn_on_nonidempotent_op(struct nfsd4_op *op) 2351 { 2352 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 2353 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 2354 op->opnum, nfsd4_op_name(op->opnum)); 2355 WARN_ON_ONCE(1); 2356 } 2357 } 2358 2359 static const char *nfsd4_op_name(unsigned opnum) 2360 { 2361 if (opnum < ARRAY_SIZE(nfsd4_ops)) 2362 return nfsd4_ops[opnum].op_name; 2363 return "unknown_operation"; 2364 } 2365 2366 #define nfsd4_voidres nfsd4_voidargs 2367 struct nfsd4_voidargs { int dummy; }; 2368 2369 static struct svc_procedure nfsd_procedures4[2] = { 2370 [NFSPROC4_NULL] = { 2371 .pc_func = (svc_procfunc) nfsd4_proc_null, 2372 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 2373 .pc_argsize = sizeof(struct nfsd4_voidargs), 2374 .pc_ressize = sizeof(struct nfsd4_voidres), 2375 .pc_cachetype = RC_NOCACHE, 2376 .pc_xdrressize = 1, 2377 }, 2378 [NFSPROC4_COMPOUND] = { 2379 .pc_func = (svc_procfunc) nfsd4_proc_compound, 2380 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 2381 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 2382 .pc_argsize = sizeof(struct nfsd4_compoundargs), 2383 .pc_ressize = sizeof(struct nfsd4_compoundres), 2384 .pc_release = nfsd4_release_compoundargs, 2385 .pc_cachetype = RC_NOCACHE, 2386 .pc_xdrressize = NFSD_BUFSIZE/4, 2387 }, 2388 }; 2389 2390 struct svc_version nfsd_version4 = { 2391 .vs_vers = 4, 2392 .vs_nproc = 2, 2393 .vs_proc = nfsd_procedures4, 2394 .vs_dispatch = nfsd_dispatch, 2395 .vs_xdrsize = NFS4_SVC_XDRSIZE, 2396 .vs_rpcb_optnl = 1, 2397 }; 2398 2399 /* 2400 * Local variables: 2401 * c-basic-offset: 8 2402 * End: 2403 */ 2404