1 /* 2 * Server-side procedures for NFSv4. 3 * 4 * Copyright (c) 2002 The Regents of the University of Michigan. 5 * All rights reserved. 6 * 7 * Kendrick Smith <kmsmith@umich.edu> 8 * Andy Adamson <andros@umich.edu> 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its 20 * contributors may be used to endorse or promote products derived 21 * from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 24 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 25 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 26 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 30 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 31 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 32 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 33 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 #include <linux/file.h> 36 #include <linux/falloc.h> 37 #include <linux/slab.h> 38 39 #include "idmap.h" 40 #include "cache.h" 41 #include "xdr4.h" 42 #include "vfs.h" 43 #include "current_stateid.h" 44 #include "netns.h" 45 #include "acl.h" 46 #include "pnfs.h" 47 #include "trace.h" 48 49 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 50 #include <linux/security.h> 51 52 static inline void 53 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 54 { 55 struct inode *inode = d_inode(resfh->fh_dentry); 56 int status; 57 58 mutex_lock(&inode->i_mutex); 59 status = security_inode_setsecctx(resfh->fh_dentry, 60 label->data, label->len); 61 mutex_unlock(&inode->i_mutex); 62 63 if (status) 64 /* 65 * XXX: We should really fail the whole open, but we may 66 * already have created a new file, so it may be too 67 * late. For now this seems the least of evils: 68 */ 69 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 70 71 return; 72 } 73 #else 74 static inline void 75 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 76 { } 77 #endif 78 79 #define NFSDDBG_FACILITY NFSDDBG_PROC 80 81 static u32 nfsd_attrmask[] = { 82 NFSD_WRITEABLE_ATTRS_WORD0, 83 NFSD_WRITEABLE_ATTRS_WORD1, 84 NFSD_WRITEABLE_ATTRS_WORD2 85 }; 86 87 static u32 nfsd41_ex_attrmask[] = { 88 NFSD_SUPPATTR_EXCLCREAT_WORD0, 89 NFSD_SUPPATTR_EXCLCREAT_WORD1, 90 NFSD_SUPPATTR_EXCLCREAT_WORD2 91 }; 92 93 static __be32 94 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 95 u32 *bmval, u32 *writable) 96 { 97 struct dentry *dentry = cstate->current_fh.fh_dentry; 98 99 /* 100 * Check about attributes are supported by the NFSv4 server or not. 101 * According to spec, unsupported attributes return ERR_ATTRNOTSUPP. 102 */ 103 if ((bmval[0] & ~nfsd_suppattrs0(cstate->minorversion)) || 104 (bmval[1] & ~nfsd_suppattrs1(cstate->minorversion)) || 105 (bmval[2] & ~nfsd_suppattrs2(cstate->minorversion))) 106 return nfserr_attrnotsupp; 107 108 /* 109 * Check FATTR4_WORD0_ACL can be supported 110 * in current environment or not. 111 */ 112 if (bmval[0] & FATTR4_WORD0_ACL) { 113 if (!IS_POSIXACL(d_inode(dentry))) 114 return nfserr_attrnotsupp; 115 } 116 117 /* 118 * According to spec, read-only attributes return ERR_INVAL. 119 */ 120 if (writable) { 121 if ((bmval[0] & ~writable[0]) || (bmval[1] & ~writable[1]) || 122 (bmval[2] & ~writable[2])) 123 return nfserr_inval; 124 } 125 126 return nfs_ok; 127 } 128 129 static __be32 130 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 131 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 132 { 133 __be32 status = nfs_ok; 134 135 if (open->op_create == NFS4_OPEN_CREATE) { 136 if (open->op_createmode == NFS4_CREATE_UNCHECKED 137 || open->op_createmode == NFS4_CREATE_GUARDED) 138 status = check_attr_support(rqstp, cstate, 139 open->op_bmval, nfsd_attrmask); 140 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 141 status = check_attr_support(rqstp, cstate, 142 open->op_bmval, nfsd41_ex_attrmask); 143 } 144 145 return status; 146 } 147 148 static int 149 is_create_with_attrs(struct nfsd4_open *open) 150 { 151 return open->op_create == NFS4_OPEN_CREATE 152 && (open->op_createmode == NFS4_CREATE_UNCHECKED 153 || open->op_createmode == NFS4_CREATE_GUARDED 154 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 155 } 156 157 /* 158 * if error occurs when setting the acl, just clear the acl bit 159 * in the returned attr bitmap. 160 */ 161 static void 162 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 163 struct nfs4_acl *acl, u32 *bmval) 164 { 165 __be32 status; 166 167 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 168 if (status) 169 /* 170 * We should probably fail the whole open at this point, 171 * but we've already created the file, so it's too late; 172 * So this seems the least of evils: 173 */ 174 bmval[0] &= ~FATTR4_WORD0_ACL; 175 } 176 177 static inline void 178 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 179 { 180 fh_put(dst); 181 dget(src->fh_dentry); 182 if (src->fh_export) 183 exp_get(src->fh_export); 184 *dst = *src; 185 } 186 187 static __be32 188 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 189 { 190 __be32 status; 191 192 if (open->op_truncate && 193 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 194 return nfserr_inval; 195 196 accmode |= NFSD_MAY_READ_IF_EXEC; 197 198 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 199 accmode |= NFSD_MAY_READ; 200 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 201 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 202 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 203 accmode |= NFSD_MAY_WRITE; 204 205 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 206 207 return status; 208 } 209 210 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 211 { 212 umode_t mode = d_inode(fh->fh_dentry)->i_mode; 213 214 if (S_ISREG(mode)) 215 return nfs_ok; 216 if (S_ISDIR(mode)) 217 return nfserr_isdir; 218 /* 219 * Using err_symlink as our catch-all case may look odd; but 220 * there's no other obvious error for this case in 4.0, and we 221 * happen to know that it will cause the linux v4 client to do 222 * the right thing on attempts to open something other than a 223 * regular file. 224 */ 225 return nfserr_symlink; 226 } 227 228 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 229 { 230 if (nfsd4_has_session(cstate)) 231 return; 232 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 233 &resfh->fh_handle); 234 } 235 236 static __be32 237 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) 238 { 239 struct svc_fh *current_fh = &cstate->current_fh; 240 int accmode; 241 __be32 status; 242 243 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 244 if (!*resfh) 245 return nfserr_jukebox; 246 fh_init(*resfh, NFS4_FHSIZE); 247 open->op_truncate = 0; 248 249 if (open->op_create) { 250 /* FIXME: check session persistence and pnfs flags. 251 * The nfsv4.1 spec requires the following semantics: 252 * 253 * Persistent | pNFS | Server REQUIRED | Client Allowed 254 * Reply Cache | server | | 255 * -------------+--------+-----------------+-------------------- 256 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 257 * | | | (SHOULD) 258 * | | and EXCLUSIVE4 | or EXCLUSIVE4 259 * | | | (SHOULD NOT) 260 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 261 * yes | no | GUARDED4 | GUARDED4 262 * yes | yes | GUARDED4 | GUARDED4 263 */ 264 265 /* 266 * Note: create modes (UNCHECKED,GUARDED...) are the same 267 * in NFSv4 as in v3 except EXCLUSIVE4_1. 268 */ 269 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, 270 open->op_fname.len, &open->op_iattr, 271 *resfh, open->op_createmode, 272 (u32 *)open->op_verf.data, 273 &open->op_truncate, &open->op_created); 274 275 if (!status && open->op_label.len) 276 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); 277 278 /* 279 * Following rfc 3530 14.2.16, use the returned bitmask 280 * to indicate which attributes we used to store the 281 * verifier: 282 */ 283 if (open->op_createmode == NFS4_CREATE_EXCLUSIVE && status == 0) 284 open->op_bmval[1] = (FATTR4_WORD1_TIME_ACCESS | 285 FATTR4_WORD1_TIME_MODIFY); 286 } else 287 /* 288 * Note this may exit with the parent still locked. 289 * We will hold the lock until nfsd4_open's final 290 * lookup, to prevent renames or unlinks until we've had 291 * a chance to an acquire a delegation if appropriate. 292 */ 293 status = nfsd_lookup(rqstp, current_fh, 294 open->op_fname.data, open->op_fname.len, *resfh); 295 if (status) 296 goto out; 297 status = nfsd_check_obj_isreg(*resfh); 298 if (status) 299 goto out; 300 301 if (is_create_with_attrs(open) && open->op_acl != NULL) 302 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); 303 304 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); 305 accmode = NFSD_MAY_NOP; 306 if (open->op_created || 307 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 308 accmode |= NFSD_MAY_OWNER_OVERRIDE; 309 status = do_open_permission(rqstp, *resfh, open, accmode); 310 set_change_info(&open->op_cinfo, current_fh); 311 out: 312 return status; 313 } 314 315 static __be32 316 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 317 { 318 struct svc_fh *current_fh = &cstate->current_fh; 319 __be32 status; 320 int accmode = 0; 321 322 /* We don't know the target directory, and therefore can not 323 * set the change info 324 */ 325 326 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 327 328 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 329 330 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 331 (open->op_iattr.ia_size == 0); 332 /* 333 * In the delegation case, the client is telling us about an 334 * open that it *already* performed locally, some time ago. We 335 * should let it succeed now if possible. 336 * 337 * In the case of a CLAIM_FH open, on the other hand, the client 338 * may be counting on us to enforce permissions (the Linux 4.1 339 * client uses this for normal opens, for example). 340 */ 341 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 342 accmode = NFSD_MAY_OWNER_OVERRIDE; 343 344 status = do_open_permission(rqstp, current_fh, open, accmode); 345 346 return status; 347 } 348 349 static void 350 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 351 { 352 struct nfsd4_sessionid *sid = 353 (struct nfsd4_sessionid *)session->se_sessionid.data; 354 355 clid->cl_boot = sid->clientid.cl_boot; 356 clid->cl_id = sid->clientid.cl_id; 357 } 358 359 static __be32 360 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 361 struct nfsd4_open *open) 362 { 363 __be32 status; 364 struct svc_fh *resfh = NULL; 365 struct nfsd4_compoundres *resp; 366 struct net *net = SVC_NET(rqstp); 367 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 368 369 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 370 (int)open->op_fname.len, open->op_fname.data, 371 open->op_openowner); 372 373 /* This check required by spec. */ 374 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 375 return nfserr_inval; 376 377 open->op_created = 0; 378 /* 379 * RFC5661 18.51.3 380 * Before RECLAIM_COMPLETE done, server should deny new lock 381 */ 382 if (nfsd4_has_session(cstate) && 383 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 384 &cstate->session->se_client->cl_flags) && 385 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 386 return nfserr_grace; 387 388 if (nfsd4_has_session(cstate)) 389 copy_clientid(&open->op_clientid, cstate->session); 390 391 /* check seqid for replay. set nfs4_owner */ 392 resp = rqstp->rq_resp; 393 status = nfsd4_process_open1(&resp->cstate, open, nn); 394 if (status == nfserr_replay_me) { 395 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 396 fh_put(&cstate->current_fh); 397 fh_copy_shallow(&cstate->current_fh.fh_handle, 398 &rp->rp_openfh); 399 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 400 if (status) 401 dprintk("nfsd4_open: replay failed" 402 " restoring previous filehandle\n"); 403 else 404 status = nfserr_replay_me; 405 } 406 if (status) 407 goto out; 408 if (open->op_xdr_error) { 409 status = open->op_xdr_error; 410 goto out; 411 } 412 413 status = nfsd4_check_open_attributes(rqstp, cstate, open); 414 if (status) 415 goto out; 416 417 /* Openowner is now set, so sequence id will get bumped. Now we need 418 * these checks before we do any creates: */ 419 status = nfserr_grace; 420 if (locks_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 421 goto out; 422 status = nfserr_no_grace; 423 if (!locks_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 424 goto out; 425 426 switch (open->op_claim_type) { 427 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 428 case NFS4_OPEN_CLAIM_NULL: 429 status = do_open_lookup(rqstp, cstate, open, &resfh); 430 if (status) 431 goto out; 432 break; 433 case NFS4_OPEN_CLAIM_PREVIOUS: 434 status = nfs4_check_open_reclaim(&open->op_clientid, 435 cstate, nn); 436 if (status) 437 goto out; 438 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 439 case NFS4_OPEN_CLAIM_FH: 440 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 441 status = do_open_fhandle(rqstp, cstate, open); 442 if (status) 443 goto out; 444 resfh = &cstate->current_fh; 445 break; 446 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 447 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 448 dprintk("NFSD: unsupported OPEN claim type %d\n", 449 open->op_claim_type); 450 status = nfserr_notsupp; 451 goto out; 452 default: 453 dprintk("NFSD: Invalid OPEN claim type %d\n", 454 open->op_claim_type); 455 status = nfserr_inval; 456 goto out; 457 } 458 /* 459 * nfsd4_process_open2() does the actual opening of the file. If 460 * successful, it (1) truncates the file if open->op_truncate was 461 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 462 */ 463 status = nfsd4_process_open2(rqstp, resfh, open); 464 WARN(status && open->op_created, 465 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 466 be32_to_cpu(status)); 467 out: 468 if (resfh && resfh != &cstate->current_fh) { 469 fh_dup2(&cstate->current_fh, resfh); 470 fh_put(resfh); 471 kfree(resfh); 472 } 473 nfsd4_cleanup_open_state(cstate, open); 474 nfsd4_bump_seqid(cstate, status); 475 return status; 476 } 477 478 /* 479 * OPEN is the only seqid-mutating operation whose decoding can fail 480 * with a seqid-mutating error (specifically, decoding of user names in 481 * the attributes). Therefore we have to do some processing to look up 482 * the stateowner so that we can bump the seqid. 483 */ 484 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 485 { 486 struct nfsd4_open *open = (struct nfsd4_open *)&op->u; 487 488 if (!seqid_mutating_err(ntohl(op->status))) 489 return op->status; 490 if (nfsd4_has_session(cstate)) 491 return op->status; 492 open->op_xdr_error = op->status; 493 return nfsd4_open(rqstp, cstate, open); 494 } 495 496 /* 497 * filehandle-manipulating ops. 498 */ 499 static __be32 500 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 501 struct svc_fh **getfh) 502 { 503 if (!cstate->current_fh.fh_dentry) 504 return nfserr_nofilehandle; 505 506 *getfh = &cstate->current_fh; 507 return nfs_ok; 508 } 509 510 static __be32 511 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 512 struct nfsd4_putfh *putfh) 513 { 514 fh_put(&cstate->current_fh); 515 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 516 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 517 putfh->pf_fhlen); 518 return fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 519 } 520 521 static __be32 522 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 523 void *arg) 524 { 525 __be32 status; 526 527 fh_put(&cstate->current_fh); 528 status = exp_pseudoroot(rqstp, &cstate->current_fh); 529 return status; 530 } 531 532 static __be32 533 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 534 void *arg) 535 { 536 if (!cstate->save_fh.fh_dentry) 537 return nfserr_restorefh; 538 539 fh_dup2(&cstate->current_fh, &cstate->save_fh); 540 if (HAS_STATE_ID(cstate, SAVED_STATE_ID_FLAG)) { 541 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 542 SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 543 } 544 return nfs_ok; 545 } 546 547 static __be32 548 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 549 void *arg) 550 { 551 if (!cstate->current_fh.fh_dentry) 552 return nfserr_nofilehandle; 553 554 fh_dup2(&cstate->save_fh, &cstate->current_fh); 555 if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG)) { 556 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 557 SET_STATE_ID(cstate, SAVED_STATE_ID_FLAG); 558 } 559 return nfs_ok; 560 } 561 562 /* 563 * misc nfsv4 ops 564 */ 565 static __be32 566 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 567 struct nfsd4_access *access) 568 { 569 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 570 return nfserr_inval; 571 572 access->ac_resp_access = access->ac_req_access; 573 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 574 &access->ac_supported); 575 } 576 577 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 578 { 579 __be32 verf[2]; 580 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 581 582 /* 583 * This is opaque to client, so no need to byte-swap. Use 584 * __force to keep sparse happy 585 */ 586 verf[0] = (__force __be32)nn->nfssvc_boot.tv_sec; 587 verf[1] = (__force __be32)nn->nfssvc_boot.tv_usec; 588 memcpy(verifier->data, verf, sizeof(verifier->data)); 589 } 590 591 static __be32 592 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 593 struct nfsd4_commit *commit) 594 { 595 gen_boot_verifier(&commit->co_verf, SVC_NET(rqstp)); 596 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 597 commit->co_count); 598 } 599 600 static __be32 601 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 602 struct nfsd4_create *create) 603 { 604 struct svc_fh resfh; 605 __be32 status; 606 dev_t rdev; 607 608 fh_init(&resfh, NFS4_FHSIZE); 609 610 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, 611 NFSD_MAY_CREATE); 612 if (status) 613 return status; 614 615 status = check_attr_support(rqstp, cstate, create->cr_bmval, 616 nfsd_attrmask); 617 if (status) 618 return status; 619 620 switch (create->cr_type) { 621 case NF4LNK: 622 status = nfsd_symlink(rqstp, &cstate->current_fh, 623 create->cr_name, create->cr_namelen, 624 create->cr_data, &resfh); 625 break; 626 627 case NF4BLK: 628 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 629 if (MAJOR(rdev) != create->cr_specdata1 || 630 MINOR(rdev) != create->cr_specdata2) 631 return nfserr_inval; 632 status = nfsd_create(rqstp, &cstate->current_fh, 633 create->cr_name, create->cr_namelen, 634 &create->cr_iattr, S_IFBLK, rdev, &resfh); 635 break; 636 637 case NF4CHR: 638 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 639 if (MAJOR(rdev) != create->cr_specdata1 || 640 MINOR(rdev) != create->cr_specdata2) 641 return nfserr_inval; 642 status = nfsd_create(rqstp, &cstate->current_fh, 643 create->cr_name, create->cr_namelen, 644 &create->cr_iattr,S_IFCHR, rdev, &resfh); 645 break; 646 647 case NF4SOCK: 648 status = nfsd_create(rqstp, &cstate->current_fh, 649 create->cr_name, create->cr_namelen, 650 &create->cr_iattr, S_IFSOCK, 0, &resfh); 651 break; 652 653 case NF4FIFO: 654 status = nfsd_create(rqstp, &cstate->current_fh, 655 create->cr_name, create->cr_namelen, 656 &create->cr_iattr, S_IFIFO, 0, &resfh); 657 break; 658 659 case NF4DIR: 660 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 661 status = nfsd_create(rqstp, &cstate->current_fh, 662 create->cr_name, create->cr_namelen, 663 &create->cr_iattr, S_IFDIR, 0, &resfh); 664 break; 665 666 default: 667 status = nfserr_badtype; 668 } 669 670 if (status) 671 goto out; 672 673 if (create->cr_label.len) 674 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 675 676 if (create->cr_acl != NULL) 677 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 678 create->cr_bmval); 679 680 fh_unlock(&cstate->current_fh); 681 set_change_info(&create->cr_cinfo, &cstate->current_fh); 682 fh_dup2(&cstate->current_fh, &resfh); 683 out: 684 fh_put(&resfh); 685 return status; 686 } 687 688 static __be32 689 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 690 struct nfsd4_getattr *getattr) 691 { 692 __be32 status; 693 694 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 695 if (status) 696 return status; 697 698 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 699 return nfserr_inval; 700 701 getattr->ga_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 702 getattr->ga_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 703 getattr->ga_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 704 705 getattr->ga_fhp = &cstate->current_fh; 706 return nfs_ok; 707 } 708 709 static __be32 710 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 711 struct nfsd4_link *link) 712 { 713 __be32 status = nfserr_nofilehandle; 714 715 if (!cstate->save_fh.fh_dentry) 716 return status; 717 status = nfsd_link(rqstp, &cstate->current_fh, 718 link->li_name, link->li_namelen, &cstate->save_fh); 719 if (!status) 720 set_change_info(&link->li_cinfo, &cstate->current_fh); 721 return status; 722 } 723 724 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 725 { 726 struct svc_fh tmp_fh; 727 __be32 ret; 728 729 fh_init(&tmp_fh, NFS4_FHSIZE); 730 ret = exp_pseudoroot(rqstp, &tmp_fh); 731 if (ret) 732 return ret; 733 if (tmp_fh.fh_dentry == fh->fh_dentry) { 734 fh_put(&tmp_fh); 735 return nfserr_noent; 736 } 737 fh_put(&tmp_fh); 738 return nfsd_lookup(rqstp, fh, "..", 2, fh); 739 } 740 741 static __be32 742 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 743 void *arg) 744 { 745 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 746 } 747 748 static __be32 749 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 750 struct nfsd4_lookup *lookup) 751 { 752 return nfsd_lookup(rqstp, &cstate->current_fh, 753 lookup->lo_name, lookup->lo_len, 754 &cstate->current_fh); 755 } 756 757 static __be32 758 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 759 struct nfsd4_read *read) 760 { 761 __be32 status; 762 763 read->rd_filp = NULL; 764 if (read->rd_offset >= OFFSET_MAX) 765 return nfserr_inval; 766 767 /* 768 * If we do a zero copy read, then a client will see read data 769 * that reflects the state of the file *after* performing the 770 * following compound. 771 * 772 * To ensure proper ordering, we therefore turn off zero copy if 773 * the client wants us to do more in this compound: 774 */ 775 if (!nfsd4_last_compound_op(rqstp)) 776 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 777 778 /* check stateid */ 779 status = nfs4_preprocess_stateid_op(rqstp, cstate, &read->rd_stateid, 780 RD_STATE, &read->rd_filp, &read->rd_tmp_file); 781 if (status) { 782 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 783 goto out; 784 } 785 status = nfs_ok; 786 out: 787 read->rd_rqstp = rqstp; 788 read->rd_fhp = &cstate->current_fh; 789 return status; 790 } 791 792 static __be32 793 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 794 struct nfsd4_readdir *readdir) 795 { 796 u64 cookie = readdir->rd_cookie; 797 static const nfs4_verifier zeroverf; 798 799 /* no need to check permission - this will be done in nfsd_readdir() */ 800 801 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 802 return nfserr_inval; 803 804 readdir->rd_bmval[0] &= nfsd_suppattrs0(cstate->minorversion); 805 readdir->rd_bmval[1] &= nfsd_suppattrs1(cstate->minorversion); 806 readdir->rd_bmval[2] &= nfsd_suppattrs2(cstate->minorversion); 807 808 if ((cookie == 1) || (cookie == 2) || 809 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 810 return nfserr_bad_cookie; 811 812 readdir->rd_rqstp = rqstp; 813 readdir->rd_fhp = &cstate->current_fh; 814 return nfs_ok; 815 } 816 817 static __be32 818 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 819 struct nfsd4_readlink *readlink) 820 { 821 readlink->rl_rqstp = rqstp; 822 readlink->rl_fhp = &cstate->current_fh; 823 return nfs_ok; 824 } 825 826 static __be32 827 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 828 struct nfsd4_remove *remove) 829 { 830 __be32 status; 831 832 if (locks_in_grace(SVC_NET(rqstp))) 833 return nfserr_grace; 834 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 835 remove->rm_name, remove->rm_namelen); 836 if (!status) { 837 fh_unlock(&cstate->current_fh); 838 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 839 } 840 return status; 841 } 842 843 static __be32 844 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 845 struct nfsd4_rename *rename) 846 { 847 __be32 status = nfserr_nofilehandle; 848 849 if (!cstate->save_fh.fh_dentry) 850 return status; 851 if (locks_in_grace(SVC_NET(rqstp)) && 852 !(cstate->save_fh.fh_export->ex_flags & NFSEXP_NOSUBTREECHECK)) 853 return nfserr_grace; 854 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 855 rename->rn_snamelen, &cstate->current_fh, 856 rename->rn_tname, rename->rn_tnamelen); 857 if (status) 858 return status; 859 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 860 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 861 return nfs_ok; 862 } 863 864 static __be32 865 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 866 struct nfsd4_secinfo *secinfo) 867 { 868 struct svc_fh resfh; 869 struct svc_export *exp; 870 struct dentry *dentry; 871 __be32 err; 872 873 fh_init(&resfh, NFS4_FHSIZE); 874 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 875 if (err) 876 return err; 877 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 878 secinfo->si_name, secinfo->si_namelen, 879 &exp, &dentry); 880 if (err) 881 return err; 882 if (d_really_is_negative(dentry)) { 883 exp_put(exp); 884 err = nfserr_noent; 885 } else 886 secinfo->si_exp = exp; 887 dput(dentry); 888 if (cstate->minorversion) 889 /* See rfc 5661 section 2.6.3.1.1.8 */ 890 fh_put(&cstate->current_fh); 891 return err; 892 } 893 894 static __be32 895 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 896 struct nfsd4_secinfo_no_name *sin) 897 { 898 __be32 err; 899 900 switch (sin->sin_style) { 901 case NFS4_SECINFO_STYLE4_CURRENT_FH: 902 break; 903 case NFS4_SECINFO_STYLE4_PARENT: 904 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 905 if (err) 906 return err; 907 break; 908 default: 909 return nfserr_inval; 910 } 911 912 sin->sin_exp = exp_get(cstate->current_fh.fh_export); 913 fh_put(&cstate->current_fh); 914 return nfs_ok; 915 } 916 917 static __be32 918 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 919 struct nfsd4_setattr *setattr) 920 { 921 __be32 status = nfs_ok; 922 int err; 923 924 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 925 status = nfs4_preprocess_stateid_op(rqstp, cstate, 926 &setattr->sa_stateid, WR_STATE, NULL, NULL); 927 if (status) { 928 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 929 return status; 930 } 931 } 932 err = fh_want_write(&cstate->current_fh); 933 if (err) 934 return nfserrno(err); 935 status = nfs_ok; 936 937 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 938 nfsd_attrmask); 939 if (status) 940 goto out; 941 942 if (setattr->sa_acl != NULL) 943 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 944 setattr->sa_acl); 945 if (status) 946 goto out; 947 if (setattr->sa_label.len) 948 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 949 &setattr->sa_label); 950 if (status) 951 goto out; 952 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 953 0, (time_t)0); 954 out: 955 fh_drop_write(&cstate->current_fh); 956 return status; 957 } 958 959 static int fill_in_write_vector(struct kvec *vec, struct nfsd4_write *write) 960 { 961 int i = 1; 962 int buflen = write->wr_buflen; 963 964 vec[0].iov_base = write->wr_head.iov_base; 965 vec[0].iov_len = min_t(int, buflen, write->wr_head.iov_len); 966 buflen -= vec[0].iov_len; 967 968 while (buflen) { 969 vec[i].iov_base = page_address(write->wr_pagelist[i - 1]); 970 vec[i].iov_len = min_t(int, PAGE_SIZE, buflen); 971 buflen -= vec[i].iov_len; 972 i++; 973 } 974 return i; 975 } 976 977 static __be32 978 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 979 struct nfsd4_write *write) 980 { 981 stateid_t *stateid = &write->wr_stateid; 982 struct file *filp = NULL; 983 __be32 status = nfs_ok; 984 unsigned long cnt; 985 int nvecs; 986 987 if (write->wr_offset >= OFFSET_MAX) 988 return nfserr_inval; 989 990 status = nfs4_preprocess_stateid_op(rqstp, cstate, stateid, WR_STATE, 991 &filp, NULL); 992 if (status) { 993 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 994 return status; 995 } 996 997 cnt = write->wr_buflen; 998 write->wr_how_written = write->wr_stable_how; 999 gen_boot_verifier(&write->wr_verifier, SVC_NET(rqstp)); 1000 1001 nvecs = fill_in_write_vector(rqstp->rq_vec, write); 1002 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1003 1004 status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp, 1005 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 1006 &write->wr_how_written); 1007 fput(filp); 1008 1009 write->wr_bytes_written = cnt; 1010 1011 return status; 1012 } 1013 1014 static __be32 1015 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1016 struct nfsd4_fallocate *fallocate, int flags) 1017 { 1018 __be32 status = nfserr_notsupp; 1019 struct file *file; 1020 1021 status = nfs4_preprocess_stateid_op(rqstp, cstate, 1022 &fallocate->falloc_stateid, 1023 WR_STATE, &file, NULL); 1024 if (status != nfs_ok) { 1025 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1026 return status; 1027 } 1028 1029 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, file, 1030 fallocate->falloc_offset, 1031 fallocate->falloc_length, 1032 flags); 1033 fput(file); 1034 return status; 1035 } 1036 1037 static __be32 1038 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1039 struct nfsd4_fallocate *fallocate) 1040 { 1041 return nfsd4_fallocate(rqstp, cstate, fallocate, 0); 1042 } 1043 1044 static __be32 1045 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1046 struct nfsd4_fallocate *fallocate) 1047 { 1048 return nfsd4_fallocate(rqstp, cstate, fallocate, 1049 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1050 } 1051 1052 static __be32 1053 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1054 struct nfsd4_seek *seek) 1055 { 1056 int whence; 1057 __be32 status; 1058 struct file *file; 1059 1060 status = nfs4_preprocess_stateid_op(rqstp, cstate, 1061 &seek->seek_stateid, 1062 RD_STATE, &file, NULL); 1063 if (status) { 1064 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1065 return status; 1066 } 1067 1068 switch (seek->seek_whence) { 1069 case NFS4_CONTENT_DATA: 1070 whence = SEEK_DATA; 1071 break; 1072 case NFS4_CONTENT_HOLE: 1073 whence = SEEK_HOLE; 1074 break; 1075 default: 1076 status = nfserr_union_notsupp; 1077 goto out; 1078 } 1079 1080 /* 1081 * Note: This call does change file->f_pos, but nothing in NFSD 1082 * should ever file->f_pos. 1083 */ 1084 seek->seek_pos = vfs_llseek(file, seek->seek_offset, whence); 1085 if (seek->seek_pos < 0) 1086 status = nfserrno(seek->seek_pos); 1087 else if (seek->seek_pos >= i_size_read(file_inode(file))) 1088 seek->seek_eof = true; 1089 1090 out: 1091 fput(file); 1092 return status; 1093 } 1094 1095 /* This routine never returns NFS_OK! If there are no other errors, it 1096 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1097 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1098 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1099 */ 1100 static __be32 1101 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1102 struct nfsd4_verify *verify) 1103 { 1104 __be32 *buf, *p; 1105 int count; 1106 __be32 status; 1107 1108 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1109 if (status) 1110 return status; 1111 1112 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1113 if (status) 1114 return status; 1115 1116 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1117 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1118 return nfserr_inval; 1119 if (verify->ve_attrlen & 3) 1120 return nfserr_inval; 1121 1122 /* count in words: 1123 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1124 */ 1125 count = 4 + (verify->ve_attrlen >> 2); 1126 buf = kmalloc(count << 2, GFP_KERNEL); 1127 if (!buf) 1128 return nfserr_jukebox; 1129 1130 p = buf; 1131 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1132 cstate->current_fh.fh_export, 1133 cstate->current_fh.fh_dentry, 1134 verify->ve_bmval, 1135 rqstp, 0); 1136 /* 1137 * If nfsd4_encode_fattr() ran out of space, assume that's because 1138 * the attributes are longer (hence different) than those given: 1139 */ 1140 if (status == nfserr_resource) 1141 status = nfserr_not_same; 1142 if (status) 1143 goto out_kfree; 1144 1145 /* skip bitmap */ 1146 p = buf + 1 + ntohl(buf[0]); 1147 status = nfserr_not_same; 1148 if (ntohl(*p++) != verify->ve_attrlen) 1149 goto out_kfree; 1150 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1151 status = nfserr_same; 1152 1153 out_kfree: 1154 kfree(buf); 1155 return status; 1156 } 1157 1158 static __be32 1159 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1160 struct nfsd4_verify *verify) 1161 { 1162 __be32 status; 1163 1164 status = _nfsd4_verify(rqstp, cstate, verify); 1165 return status == nfserr_not_same ? nfs_ok : status; 1166 } 1167 1168 static __be32 1169 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1170 struct nfsd4_verify *verify) 1171 { 1172 __be32 status; 1173 1174 status = _nfsd4_verify(rqstp, cstate, verify); 1175 return status == nfserr_same ? nfs_ok : status; 1176 } 1177 1178 #ifdef CONFIG_NFSD_PNFS 1179 static const struct nfsd4_layout_ops * 1180 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1181 { 1182 if (!exp->ex_layout_type) { 1183 dprintk("%s: export does not support pNFS\n", __func__); 1184 return NULL; 1185 } 1186 1187 if (exp->ex_layout_type != layout_type) { 1188 dprintk("%s: layout type %d not supported\n", 1189 __func__, layout_type); 1190 return NULL; 1191 } 1192 1193 return nfsd4_layout_ops[layout_type]; 1194 } 1195 1196 static __be32 1197 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1198 struct nfsd4_compound_state *cstate, 1199 struct nfsd4_getdeviceinfo *gdp) 1200 { 1201 const struct nfsd4_layout_ops *ops; 1202 struct nfsd4_deviceid_map *map; 1203 struct svc_export *exp; 1204 __be32 nfserr; 1205 1206 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1207 __func__, 1208 gdp->gd_layout_type, 1209 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1210 gdp->gd_maxcount); 1211 1212 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1213 if (!map) { 1214 dprintk("%s: couldn't find device ID to export mapping!\n", 1215 __func__); 1216 return nfserr_noent; 1217 } 1218 1219 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1220 if (IS_ERR(exp)) { 1221 dprintk("%s: could not find device id\n", __func__); 1222 return nfserr_noent; 1223 } 1224 1225 nfserr = nfserr_layoutunavailable; 1226 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1227 if (!ops) 1228 goto out; 1229 1230 nfserr = nfs_ok; 1231 if (gdp->gd_maxcount != 0) 1232 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, gdp); 1233 1234 gdp->gd_notify_types &= ops->notify_types; 1235 out: 1236 exp_put(exp); 1237 return nfserr; 1238 } 1239 1240 static __be32 1241 nfsd4_layoutget(struct svc_rqst *rqstp, 1242 struct nfsd4_compound_state *cstate, 1243 struct nfsd4_layoutget *lgp) 1244 { 1245 struct svc_fh *current_fh = &cstate->current_fh; 1246 const struct nfsd4_layout_ops *ops; 1247 struct nfs4_layout_stateid *ls; 1248 __be32 nfserr; 1249 int accmode; 1250 1251 switch (lgp->lg_seg.iomode) { 1252 case IOMODE_READ: 1253 accmode = NFSD_MAY_READ; 1254 break; 1255 case IOMODE_RW: 1256 accmode = NFSD_MAY_READ | NFSD_MAY_WRITE; 1257 break; 1258 default: 1259 dprintk("%s: invalid iomode %d\n", 1260 __func__, lgp->lg_seg.iomode); 1261 nfserr = nfserr_badiomode; 1262 goto out; 1263 } 1264 1265 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1266 if (nfserr) 1267 goto out; 1268 1269 nfserr = nfserr_layoutunavailable; 1270 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1271 if (!ops) 1272 goto out; 1273 1274 /* 1275 * Verify minlength and range as per RFC5661: 1276 * o If loga_length is less than loga_minlength, 1277 * the metadata server MUST return NFS4ERR_INVAL. 1278 * o If the sum of loga_offset and loga_minlength exceeds 1279 * NFS4_UINT64_MAX, and loga_minlength is not 1280 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1281 * o If the sum of loga_offset and loga_length exceeds 1282 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1283 * the error NFS4ERR_INVAL MUST result. 1284 */ 1285 nfserr = nfserr_inval; 1286 if (lgp->lg_seg.length < lgp->lg_minlength || 1287 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1288 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1289 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1290 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1291 goto out; 1292 if (lgp->lg_seg.length == 0) 1293 goto out; 1294 1295 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1296 true, lgp->lg_layout_type, &ls); 1297 if (nfserr) { 1298 trace_layout_get_lookup_fail(&lgp->lg_sid); 1299 goto out; 1300 } 1301 1302 nfserr = nfserr_recallconflict; 1303 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1304 goto out_put_stid; 1305 1306 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1307 current_fh, lgp); 1308 if (nfserr) 1309 goto out_put_stid; 1310 1311 nfserr = nfsd4_insert_layout(lgp, ls); 1312 1313 out_put_stid: 1314 nfs4_put_stid(&ls->ls_stid); 1315 out: 1316 return nfserr; 1317 } 1318 1319 static __be32 1320 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1321 struct nfsd4_compound_state *cstate, 1322 struct nfsd4_layoutcommit *lcp) 1323 { 1324 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1325 struct svc_fh *current_fh = &cstate->current_fh; 1326 const struct nfsd4_layout_ops *ops; 1327 loff_t new_size = lcp->lc_last_wr + 1; 1328 struct inode *inode; 1329 struct nfs4_layout_stateid *ls; 1330 __be32 nfserr; 1331 1332 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 1333 if (nfserr) 1334 goto out; 1335 1336 nfserr = nfserr_layoutunavailable; 1337 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 1338 if (!ops) 1339 goto out; 1340 inode = d_inode(current_fh->fh_dentry); 1341 1342 nfserr = nfserr_inval; 1343 if (new_size <= seg->offset) { 1344 dprintk("pnfsd: last write before layout segment\n"); 1345 goto out; 1346 } 1347 if (new_size > seg->offset + seg->length) { 1348 dprintk("pnfsd: last write beyond layout segment\n"); 1349 goto out; 1350 } 1351 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 1352 dprintk("pnfsd: layoutcommit beyond EOF\n"); 1353 goto out; 1354 } 1355 1356 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 1357 false, lcp->lc_layout_type, 1358 &ls); 1359 if (nfserr) { 1360 trace_layout_commit_lookup_fail(&lcp->lc_sid); 1361 /* fixup error code as per RFC5661 */ 1362 if (nfserr == nfserr_bad_stateid) 1363 nfserr = nfserr_badlayout; 1364 goto out; 1365 } 1366 1367 nfserr = ops->proc_layoutcommit(inode, lcp); 1368 if (nfserr) 1369 goto out_put_stid; 1370 1371 if (new_size > i_size_read(inode)) { 1372 lcp->lc_size_chg = 1; 1373 lcp->lc_newsize = new_size; 1374 } else { 1375 lcp->lc_size_chg = 0; 1376 } 1377 1378 out_put_stid: 1379 nfs4_put_stid(&ls->ls_stid); 1380 out: 1381 return nfserr; 1382 } 1383 1384 static __be32 1385 nfsd4_layoutreturn(struct svc_rqst *rqstp, 1386 struct nfsd4_compound_state *cstate, 1387 struct nfsd4_layoutreturn *lrp) 1388 { 1389 struct svc_fh *current_fh = &cstate->current_fh; 1390 __be32 nfserr; 1391 1392 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 1393 if (nfserr) 1394 goto out; 1395 1396 nfserr = nfserr_layoutunavailable; 1397 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 1398 goto out; 1399 1400 switch (lrp->lr_seg.iomode) { 1401 case IOMODE_READ: 1402 case IOMODE_RW: 1403 case IOMODE_ANY: 1404 break; 1405 default: 1406 dprintk("%s: invalid iomode %d\n", __func__, 1407 lrp->lr_seg.iomode); 1408 nfserr = nfserr_inval; 1409 goto out; 1410 } 1411 1412 switch (lrp->lr_return_type) { 1413 case RETURN_FILE: 1414 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 1415 break; 1416 case RETURN_FSID: 1417 case RETURN_ALL: 1418 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 1419 break; 1420 default: 1421 dprintk("%s: invalid return_type %d\n", __func__, 1422 lrp->lr_return_type); 1423 nfserr = nfserr_inval; 1424 break; 1425 } 1426 out: 1427 return nfserr; 1428 } 1429 #endif /* CONFIG_NFSD_PNFS */ 1430 1431 /* 1432 * NULL call. 1433 */ 1434 static __be32 1435 nfsd4_proc_null(struct svc_rqst *rqstp, void *argp, void *resp) 1436 { 1437 return nfs_ok; 1438 } 1439 1440 static inline void nfsd4_increment_op_stats(u32 opnum) 1441 { 1442 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 1443 nfsdstats.nfs4_opcount[opnum]++; 1444 } 1445 1446 typedef __be32(*nfsd4op_func)(struct svc_rqst *, struct nfsd4_compound_state *, 1447 void *); 1448 typedef u32(*nfsd4op_rsize)(struct svc_rqst *, struct nfsd4_op *op); 1449 typedef void(*stateid_setter)(struct nfsd4_compound_state *, void *); 1450 typedef void(*stateid_getter)(struct nfsd4_compound_state *, void *); 1451 1452 enum nfsd4_op_flags { 1453 ALLOWED_WITHOUT_FH = 1 << 0, /* No current filehandle required */ 1454 ALLOWED_ON_ABSENT_FS = 1 << 1, /* ops processed on absent fs */ 1455 ALLOWED_AS_FIRST_OP = 1 << 2, /* ops reqired first in compound */ 1456 /* For rfc 5661 section 2.6.3.1.1: */ 1457 OP_HANDLES_WRONGSEC = 1 << 3, 1458 OP_IS_PUTFH_LIKE = 1 << 4, 1459 /* 1460 * These are the ops whose result size we estimate before 1461 * encoding, to avoid performing an op then not being able to 1462 * respond or cache a response. This includes writes and setattrs 1463 * as well as the operations usually called "nonidempotent": 1464 */ 1465 OP_MODIFIES_SOMETHING = 1 << 5, 1466 /* 1467 * Cache compounds containing these ops in the xid-based drc: 1468 * We use the DRC for compounds containing non-idempotent 1469 * operations, *except* those that are 4.1-specific (since 1470 * sessions provide their own EOS), and except for stateful 1471 * operations other than setclientid and setclientid_confirm 1472 * (since sequence numbers provide EOS for open, lock, etc in 1473 * the v4.0 case). 1474 */ 1475 OP_CACHEME = 1 << 6, 1476 /* 1477 * These are ops which clear current state id. 1478 */ 1479 OP_CLEAR_STATEID = 1 << 7, 1480 }; 1481 1482 struct nfsd4_operation { 1483 nfsd4op_func op_func; 1484 u32 op_flags; 1485 char *op_name; 1486 /* Try to get response size before operation */ 1487 nfsd4op_rsize op_rsize_bop; 1488 stateid_getter op_get_currentstateid; 1489 stateid_setter op_set_currentstateid; 1490 }; 1491 1492 static struct nfsd4_operation nfsd4_ops[]; 1493 1494 static const char *nfsd4_op_name(unsigned opnum); 1495 1496 /* 1497 * Enforce NFSv4.1 COMPOUND ordering rules: 1498 * 1499 * Also note, enforced elsewhere: 1500 * - SEQUENCE other than as first op results in 1501 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 1502 * - BIND_CONN_TO_SESSION must be the only op in its compound. 1503 * (Enforced in nfsd4_bind_conn_to_session().) 1504 * - DESTROY_SESSION must be the final operation in a compound, if 1505 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 1506 * (Enforced in nfsd4_destroy_session().) 1507 */ 1508 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 1509 { 1510 struct nfsd4_op *op = &args->ops[0]; 1511 1512 /* These ordering requirements don't apply to NFSv4.0: */ 1513 if (args->minorversion == 0) 1514 return nfs_ok; 1515 /* This is weird, but OK, not our problem: */ 1516 if (args->opcnt == 0) 1517 return nfs_ok; 1518 if (op->status == nfserr_op_illegal) 1519 return nfs_ok; 1520 if (!(nfsd4_ops[op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 1521 return nfserr_op_not_in_session; 1522 if (op->opnum == OP_SEQUENCE) 1523 return nfs_ok; 1524 if (args->opcnt != 1) 1525 return nfserr_not_only_op; 1526 return nfs_ok; 1527 } 1528 1529 static inline struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 1530 { 1531 return &nfsd4_ops[op->opnum]; 1532 } 1533 1534 bool nfsd4_cache_this_op(struct nfsd4_op *op) 1535 { 1536 if (op->opnum == OP_ILLEGAL) 1537 return false; 1538 return OPDESC(op)->op_flags & OP_CACHEME; 1539 } 1540 1541 static bool need_wrongsec_check(struct svc_rqst *rqstp) 1542 { 1543 struct nfsd4_compoundres *resp = rqstp->rq_resp; 1544 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 1545 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 1546 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 1547 struct nfsd4_operation *thisd; 1548 struct nfsd4_operation *nextd; 1549 1550 thisd = OPDESC(this); 1551 /* 1552 * Most ops check wronsec on our own; only the putfh-like ops 1553 * have special rules. 1554 */ 1555 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 1556 return false; 1557 /* 1558 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 1559 * put-filehandle operation if we're not going to use the 1560 * result: 1561 */ 1562 if (argp->opcnt == resp->opcnt) 1563 return false; 1564 if (next->opnum == OP_ILLEGAL) 1565 return false; 1566 nextd = OPDESC(next); 1567 /* 1568 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 1569 * errors themselves as necessary; others should check for them 1570 * now: 1571 */ 1572 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 1573 } 1574 1575 static void svcxdr_init_encode(struct svc_rqst *rqstp, 1576 struct nfsd4_compoundres *resp) 1577 { 1578 struct xdr_stream *xdr = &resp->xdr; 1579 struct xdr_buf *buf = &rqstp->rq_res; 1580 struct kvec *head = buf->head; 1581 1582 xdr->buf = buf; 1583 xdr->iov = head; 1584 xdr->p = head->iov_base + head->iov_len; 1585 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 1586 /* Tail and page_len should be zero at this point: */ 1587 buf->len = buf->head[0].iov_len; 1588 xdr->scratch.iov_len = 0; 1589 xdr->page_ptr = buf->pages - 1; 1590 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 1591 - rqstp->rq_auth_slack; 1592 } 1593 1594 /* 1595 * COMPOUND call. 1596 */ 1597 static __be32 1598 nfsd4_proc_compound(struct svc_rqst *rqstp, 1599 struct nfsd4_compoundargs *args, 1600 struct nfsd4_compoundres *resp) 1601 { 1602 struct nfsd4_op *op; 1603 struct nfsd4_operation *opdesc; 1604 struct nfsd4_compound_state *cstate = &resp->cstate; 1605 struct svc_fh *current_fh = &cstate->current_fh; 1606 struct svc_fh *save_fh = &cstate->save_fh; 1607 __be32 status; 1608 1609 svcxdr_init_encode(rqstp, resp); 1610 resp->tagp = resp->xdr.p; 1611 /* reserve space for: taglen, tag, and opcnt */ 1612 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 1613 resp->taglen = args->taglen; 1614 resp->tag = args->tag; 1615 resp->rqstp = rqstp; 1616 cstate->minorversion = args->minorversion; 1617 fh_init(current_fh, NFS4_FHSIZE); 1618 fh_init(save_fh, NFS4_FHSIZE); 1619 /* 1620 * Don't use the deferral mechanism for NFSv4; compounds make it 1621 * too hard to avoid non-idempotency problems. 1622 */ 1623 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1624 1625 /* 1626 * According to RFC3010, this takes precedence over all other errors. 1627 */ 1628 status = nfserr_minor_vers_mismatch; 1629 if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0) 1630 goto out; 1631 1632 status = nfs41_check_op_ordering(args); 1633 if (status) { 1634 op = &args->ops[0]; 1635 op->status = status; 1636 goto encode_op; 1637 } 1638 1639 while (!status && resp->opcnt < args->opcnt) { 1640 op = &args->ops[resp->opcnt++]; 1641 1642 dprintk("nfsv4 compound op #%d/%d: %d (%s)\n", 1643 resp->opcnt, args->opcnt, op->opnum, 1644 nfsd4_op_name(op->opnum)); 1645 /* 1646 * The XDR decode routines may have pre-set op->status; 1647 * for example, if there is a miscellaneous XDR error 1648 * it will be set to nfserr_bad_xdr. 1649 */ 1650 if (op->status) { 1651 if (op->opnum == OP_OPEN) 1652 op->status = nfsd4_open_omfg(rqstp, cstate, op); 1653 goto encode_op; 1654 } 1655 1656 opdesc = OPDESC(op); 1657 1658 if (!current_fh->fh_dentry) { 1659 if (!(opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 1660 op->status = nfserr_nofilehandle; 1661 goto encode_op; 1662 } 1663 } else if (current_fh->fh_export->ex_fslocs.migrated && 1664 !(opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 1665 op->status = nfserr_moved; 1666 goto encode_op; 1667 } 1668 1669 fh_clear_wcc(current_fh); 1670 1671 /* If op is non-idempotent */ 1672 if (opdesc->op_flags & OP_MODIFIES_SOMETHING) { 1673 /* 1674 * Don't execute this op if we couldn't encode a 1675 * succesful reply: 1676 */ 1677 u32 plen = opdesc->op_rsize_bop(rqstp, op); 1678 /* 1679 * Plus if there's another operation, make sure 1680 * we'll have space to at least encode an error: 1681 */ 1682 if (resp->opcnt < args->opcnt) 1683 plen += COMPOUND_ERR_SLACK_SPACE; 1684 op->status = nfsd4_check_resp_size(resp, plen); 1685 } 1686 1687 if (op->status) 1688 goto encode_op; 1689 1690 if (opdesc->op_get_currentstateid) 1691 opdesc->op_get_currentstateid(cstate, &op->u); 1692 op->status = opdesc->op_func(rqstp, cstate, &op->u); 1693 1694 if (!op->status) { 1695 if (opdesc->op_set_currentstateid) 1696 opdesc->op_set_currentstateid(cstate, &op->u); 1697 1698 if (opdesc->op_flags & OP_CLEAR_STATEID) 1699 clear_current_stateid(cstate); 1700 1701 if (need_wrongsec_check(rqstp)) 1702 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 1703 } 1704 1705 encode_op: 1706 /* Only from SEQUENCE */ 1707 if (cstate->status == nfserr_replay_cache) { 1708 dprintk("%s NFS4.1 replay from cache\n", __func__); 1709 status = op->status; 1710 goto out; 1711 } 1712 if (op->status == nfserr_replay_me) { 1713 op->replay = &cstate->replay_owner->so_replay; 1714 nfsd4_encode_replay(&resp->xdr, op); 1715 status = op->status = op->replay->rp_status; 1716 } else { 1717 nfsd4_encode_operation(resp, op); 1718 status = op->status; 1719 } 1720 1721 dprintk("nfsv4 compound op %p opcnt %d #%d: %d: status %d\n", 1722 args->ops, args->opcnt, resp->opcnt, op->opnum, 1723 be32_to_cpu(status)); 1724 1725 nfsd4_cstate_clear_replay(cstate); 1726 nfsd4_increment_op_stats(op->opnum); 1727 } 1728 1729 cstate->status = status; 1730 fh_put(current_fh); 1731 fh_put(save_fh); 1732 BUG_ON(cstate->replay_owner); 1733 out: 1734 /* Reset deferral mechanism for RPC deferrals */ 1735 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 1736 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 1737 return status; 1738 } 1739 1740 #define op_encode_hdr_size (2) 1741 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 1742 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 1743 #define op_encode_change_info_maxsz (5) 1744 #define nfs4_fattr_bitmap_maxsz (4) 1745 1746 /* We'll fall back on returning no lockowner if run out of space: */ 1747 #define op_encode_lockowner_maxsz (0) 1748 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 1749 1750 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 1751 1752 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 1753 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 1754 op_encode_ace_maxsz) 1755 1756 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 1757 1758 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1759 { 1760 return (op_encode_hdr_size) * sizeof(__be32); 1761 } 1762 1763 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1764 { 1765 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 1766 } 1767 1768 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1769 { 1770 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 1771 } 1772 1773 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1774 { 1775 return (op_encode_hdr_size + op_encode_change_info_maxsz 1776 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1777 } 1778 1779 /* 1780 * Note since this is an idempotent operation we won't insist on failing 1781 * the op prematurely if the estimate is too large. We may turn off splice 1782 * reads unnecessarily. 1783 */ 1784 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 1785 struct nfsd4_op *op) 1786 { 1787 u32 *bmap = op->u.getattr.ga_bmval; 1788 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 1789 u32 ret = 0; 1790 1791 if (bmap0 & FATTR4_WORD0_ACL) 1792 return svc_max_payload(rqstp); 1793 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 1794 return svc_max_payload(rqstp); 1795 1796 if (bmap1 & FATTR4_WORD1_OWNER) { 1797 ret += IDMAP_NAMESZ + 4; 1798 bmap1 &= ~FATTR4_WORD1_OWNER; 1799 } 1800 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 1801 ret += IDMAP_NAMESZ + 4; 1802 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 1803 } 1804 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 1805 ret += NFS4_FHSIZE + 4; 1806 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 1807 } 1808 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 1809 ret += NFS4_MAXLABELLEN + 12; 1810 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 1811 } 1812 /* 1813 * Largest of remaining attributes are 16 bytes (e.g., 1814 * supported_attributes) 1815 */ 1816 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 1817 /* bitmask, length */ 1818 ret += 20; 1819 return ret; 1820 } 1821 1822 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1823 { 1824 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1825 * sizeof(__be32); 1826 } 1827 1828 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1829 { 1830 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 1831 * sizeof(__be32); 1832 } 1833 1834 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1835 { 1836 return (op_encode_hdr_size + op_encode_stateid_maxsz 1837 + op_encode_change_info_maxsz + 1 1838 + nfs4_fattr_bitmap_maxsz 1839 + op_encode_delegation_maxsz) * sizeof(__be32); 1840 } 1841 1842 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1843 { 1844 u32 maxcount = 0, rlen = 0; 1845 1846 maxcount = svc_max_payload(rqstp); 1847 rlen = min(op->u.read.rd_length, maxcount); 1848 1849 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 1850 } 1851 1852 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1853 { 1854 u32 maxcount = 0, rlen = 0; 1855 1856 maxcount = svc_max_payload(rqstp); 1857 rlen = min(op->u.readdir.rd_maxcount, maxcount); 1858 1859 return (op_encode_hdr_size + op_encode_verifier_maxsz + 1860 XDR_QUADLEN(rlen)) * sizeof(__be32); 1861 } 1862 1863 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1864 { 1865 return (op_encode_hdr_size + op_encode_change_info_maxsz) 1866 * sizeof(__be32); 1867 } 1868 1869 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1870 { 1871 return (op_encode_hdr_size + op_encode_change_info_maxsz 1872 + op_encode_change_info_maxsz) * sizeof(__be32); 1873 } 1874 1875 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 1876 struct nfsd4_op *op) 1877 { 1878 return (op_encode_hdr_size 1879 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 1880 } 1881 1882 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1883 { 1884 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 1885 } 1886 1887 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1888 { 1889 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 1890 sizeof(__be32); 1891 } 1892 1893 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1894 { 1895 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 1896 } 1897 1898 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1899 { 1900 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 1901 1 + 1 + /* eir_flags, spr_how */\ 1902 4 + /* spo_must_enforce & _allow with bitmap */\ 1903 2 + /*eir_server_owner.so_minor_id */\ 1904 /* eir_server_owner.so_major_id<> */\ 1905 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1906 /* eir_server_scope<> */\ 1907 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 1908 1 + /* eir_server_impl_id array length */\ 1909 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 1910 } 1911 1912 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1913 { 1914 return (op_encode_hdr_size + \ 1915 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 1916 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 1917 } 1918 1919 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1920 { 1921 return (op_encode_hdr_size + \ 1922 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 1923 2 + /* csr_sequence, csr_flags */\ 1924 op_encode_channel_attrs_maxsz + \ 1925 op_encode_channel_attrs_maxsz) * sizeof(__be32); 1926 } 1927 1928 #ifdef CONFIG_NFSD_PNFS 1929 /* 1930 * At this stage we don't really know what layout driver will handle the request, 1931 * so we need to define an arbitrary upper bound here. 1932 */ 1933 #define MAX_LAYOUT_SIZE 128 1934 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1935 { 1936 return (op_encode_hdr_size + 1937 1 /* logr_return_on_close */ + 1938 op_encode_stateid_maxsz + 1939 1 /* nr of layouts */ + 1940 MAX_LAYOUT_SIZE) * sizeof(__be32); 1941 } 1942 1943 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1944 { 1945 return (op_encode_hdr_size + 1946 1 /* locr_newsize */ + 1947 2 /* ns_size */) * sizeof(__be32); 1948 } 1949 1950 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 1951 { 1952 return (op_encode_hdr_size + 1953 1 /* lrs_stateid */ + 1954 op_encode_stateid_maxsz) * sizeof(__be32); 1955 } 1956 #endif /* CONFIG_NFSD_PNFS */ 1957 1958 static struct nfsd4_operation nfsd4_ops[] = { 1959 [OP_ACCESS] = { 1960 .op_func = (nfsd4op_func)nfsd4_access, 1961 .op_name = "OP_ACCESS", 1962 }, 1963 [OP_CLOSE] = { 1964 .op_func = (nfsd4op_func)nfsd4_close, 1965 .op_flags = OP_MODIFIES_SOMETHING, 1966 .op_name = "OP_CLOSE", 1967 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 1968 .op_get_currentstateid = (stateid_getter)nfsd4_get_closestateid, 1969 .op_set_currentstateid = (stateid_setter)nfsd4_set_closestateid, 1970 }, 1971 [OP_COMMIT] = { 1972 .op_func = (nfsd4op_func)nfsd4_commit, 1973 .op_flags = OP_MODIFIES_SOMETHING, 1974 .op_name = "OP_COMMIT", 1975 .op_rsize_bop = (nfsd4op_rsize)nfsd4_commit_rsize, 1976 }, 1977 [OP_CREATE] = { 1978 .op_func = (nfsd4op_func)nfsd4_create, 1979 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 1980 .op_name = "OP_CREATE", 1981 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_rsize, 1982 }, 1983 [OP_DELEGRETURN] = { 1984 .op_func = (nfsd4op_func)nfsd4_delegreturn, 1985 .op_flags = OP_MODIFIES_SOMETHING, 1986 .op_name = "OP_DELEGRETURN", 1987 .op_rsize_bop = nfsd4_only_status_rsize, 1988 .op_get_currentstateid = (stateid_getter)nfsd4_get_delegreturnstateid, 1989 }, 1990 [OP_GETATTR] = { 1991 .op_func = (nfsd4op_func)nfsd4_getattr, 1992 .op_flags = ALLOWED_ON_ABSENT_FS, 1993 .op_rsize_bop = nfsd4_getattr_rsize, 1994 .op_name = "OP_GETATTR", 1995 }, 1996 [OP_GETFH] = { 1997 .op_func = (nfsd4op_func)nfsd4_getfh, 1998 .op_name = "OP_GETFH", 1999 }, 2000 [OP_LINK] = { 2001 .op_func = (nfsd4op_func)nfsd4_link, 2002 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2003 | OP_CACHEME, 2004 .op_name = "OP_LINK", 2005 .op_rsize_bop = (nfsd4op_rsize)nfsd4_link_rsize, 2006 }, 2007 [OP_LOCK] = { 2008 .op_func = (nfsd4op_func)nfsd4_lock, 2009 .op_flags = OP_MODIFIES_SOMETHING, 2010 .op_name = "OP_LOCK", 2011 .op_rsize_bop = (nfsd4op_rsize)nfsd4_lock_rsize, 2012 .op_set_currentstateid = (stateid_setter)nfsd4_set_lockstateid, 2013 }, 2014 [OP_LOCKT] = { 2015 .op_func = (nfsd4op_func)nfsd4_lockt, 2016 .op_name = "OP_LOCKT", 2017 }, 2018 [OP_LOCKU] = { 2019 .op_func = (nfsd4op_func)nfsd4_locku, 2020 .op_flags = OP_MODIFIES_SOMETHING, 2021 .op_name = "OP_LOCKU", 2022 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2023 .op_get_currentstateid = (stateid_getter)nfsd4_get_lockustateid, 2024 }, 2025 [OP_LOOKUP] = { 2026 .op_func = (nfsd4op_func)nfsd4_lookup, 2027 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2028 .op_name = "OP_LOOKUP", 2029 }, 2030 [OP_LOOKUPP] = { 2031 .op_func = (nfsd4op_func)nfsd4_lookupp, 2032 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2033 .op_name = "OP_LOOKUPP", 2034 }, 2035 [OP_NVERIFY] = { 2036 .op_func = (nfsd4op_func)nfsd4_nverify, 2037 .op_name = "OP_NVERIFY", 2038 }, 2039 [OP_OPEN] = { 2040 .op_func = (nfsd4op_func)nfsd4_open, 2041 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2042 .op_name = "OP_OPEN", 2043 .op_rsize_bop = (nfsd4op_rsize)nfsd4_open_rsize, 2044 .op_set_currentstateid = (stateid_setter)nfsd4_set_openstateid, 2045 }, 2046 [OP_OPEN_CONFIRM] = { 2047 .op_func = (nfsd4op_func)nfsd4_open_confirm, 2048 .op_flags = OP_MODIFIES_SOMETHING, 2049 .op_name = "OP_OPEN_CONFIRM", 2050 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2051 }, 2052 [OP_OPEN_DOWNGRADE] = { 2053 .op_func = (nfsd4op_func)nfsd4_open_downgrade, 2054 .op_flags = OP_MODIFIES_SOMETHING, 2055 .op_name = "OP_OPEN_DOWNGRADE", 2056 .op_rsize_bop = (nfsd4op_rsize)nfsd4_status_stateid_rsize, 2057 .op_get_currentstateid = (stateid_getter)nfsd4_get_opendowngradestateid, 2058 .op_set_currentstateid = (stateid_setter)nfsd4_set_opendowngradestateid, 2059 }, 2060 [OP_PUTFH] = { 2061 .op_func = (nfsd4op_func)nfsd4_putfh, 2062 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2063 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2064 .op_name = "OP_PUTFH", 2065 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2066 }, 2067 [OP_PUTPUBFH] = { 2068 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2069 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2070 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2071 .op_name = "OP_PUTPUBFH", 2072 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2073 }, 2074 [OP_PUTROOTFH] = { 2075 .op_func = (nfsd4op_func)nfsd4_putrootfh, 2076 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2077 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2078 .op_name = "OP_PUTROOTFH", 2079 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2080 }, 2081 [OP_READ] = { 2082 .op_func = (nfsd4op_func)nfsd4_read, 2083 .op_name = "OP_READ", 2084 .op_rsize_bop = (nfsd4op_rsize)nfsd4_read_rsize, 2085 .op_get_currentstateid = (stateid_getter)nfsd4_get_readstateid, 2086 }, 2087 [OP_READDIR] = { 2088 .op_func = (nfsd4op_func)nfsd4_readdir, 2089 .op_name = "OP_READDIR", 2090 .op_rsize_bop = (nfsd4op_rsize)nfsd4_readdir_rsize, 2091 }, 2092 [OP_READLINK] = { 2093 .op_func = (nfsd4op_func)nfsd4_readlink, 2094 .op_name = "OP_READLINK", 2095 }, 2096 [OP_REMOVE] = { 2097 .op_func = (nfsd4op_func)nfsd4_remove, 2098 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2099 .op_name = "OP_REMOVE", 2100 .op_rsize_bop = (nfsd4op_rsize)nfsd4_remove_rsize, 2101 }, 2102 [OP_RENAME] = { 2103 .op_func = (nfsd4op_func)nfsd4_rename, 2104 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2105 .op_name = "OP_RENAME", 2106 .op_rsize_bop = (nfsd4op_rsize)nfsd4_rename_rsize, 2107 }, 2108 [OP_RENEW] = { 2109 .op_func = (nfsd4op_func)nfsd4_renew, 2110 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2111 | OP_MODIFIES_SOMETHING, 2112 .op_name = "OP_RENEW", 2113 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2114 2115 }, 2116 [OP_RESTOREFH] = { 2117 .op_func = (nfsd4op_func)nfsd4_restorefh, 2118 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2119 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2120 .op_name = "OP_RESTOREFH", 2121 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2122 }, 2123 [OP_SAVEFH] = { 2124 .op_func = (nfsd4op_func)nfsd4_savefh, 2125 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2126 .op_name = "OP_SAVEFH", 2127 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2128 }, 2129 [OP_SECINFO] = { 2130 .op_func = (nfsd4op_func)nfsd4_secinfo, 2131 .op_flags = OP_HANDLES_WRONGSEC, 2132 .op_name = "OP_SECINFO", 2133 }, 2134 [OP_SETATTR] = { 2135 .op_func = (nfsd4op_func)nfsd4_setattr, 2136 .op_name = "OP_SETATTR", 2137 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2138 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setattr_rsize, 2139 .op_get_currentstateid = (stateid_getter)nfsd4_get_setattrstateid, 2140 }, 2141 [OP_SETCLIENTID] = { 2142 .op_func = (nfsd4op_func)nfsd4_setclientid, 2143 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2144 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2145 .op_name = "OP_SETCLIENTID", 2146 .op_rsize_bop = (nfsd4op_rsize)nfsd4_setclientid_rsize, 2147 }, 2148 [OP_SETCLIENTID_CONFIRM] = { 2149 .op_func = (nfsd4op_func)nfsd4_setclientid_confirm, 2150 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2151 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2152 .op_name = "OP_SETCLIENTID_CONFIRM", 2153 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2154 }, 2155 [OP_VERIFY] = { 2156 .op_func = (nfsd4op_func)nfsd4_verify, 2157 .op_name = "OP_VERIFY", 2158 }, 2159 [OP_WRITE] = { 2160 .op_func = (nfsd4op_func)nfsd4_write, 2161 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2162 .op_name = "OP_WRITE", 2163 .op_rsize_bop = (nfsd4op_rsize)nfsd4_write_rsize, 2164 .op_get_currentstateid = (stateid_getter)nfsd4_get_writestateid, 2165 }, 2166 [OP_RELEASE_LOCKOWNER] = { 2167 .op_func = (nfsd4op_func)nfsd4_release_lockowner, 2168 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2169 | OP_MODIFIES_SOMETHING, 2170 .op_name = "OP_RELEASE_LOCKOWNER", 2171 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2172 }, 2173 2174 /* NFSv4.1 operations */ 2175 [OP_EXCHANGE_ID] = { 2176 .op_func = (nfsd4op_func)nfsd4_exchange_id, 2177 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2178 | OP_MODIFIES_SOMETHING, 2179 .op_name = "OP_EXCHANGE_ID", 2180 .op_rsize_bop = (nfsd4op_rsize)nfsd4_exchange_id_rsize, 2181 }, 2182 [OP_BACKCHANNEL_CTL] = { 2183 .op_func = (nfsd4op_func)nfsd4_backchannel_ctl, 2184 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2185 .op_name = "OP_BACKCHANNEL_CTL", 2186 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2187 }, 2188 [OP_BIND_CONN_TO_SESSION] = { 2189 .op_func = (nfsd4op_func)nfsd4_bind_conn_to_session, 2190 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2191 | OP_MODIFIES_SOMETHING, 2192 .op_name = "OP_BIND_CONN_TO_SESSION", 2193 .op_rsize_bop = (nfsd4op_rsize)nfsd4_bind_conn_to_session_rsize, 2194 }, 2195 [OP_CREATE_SESSION] = { 2196 .op_func = (nfsd4op_func)nfsd4_create_session, 2197 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2198 | OP_MODIFIES_SOMETHING, 2199 .op_name = "OP_CREATE_SESSION", 2200 .op_rsize_bop = (nfsd4op_rsize)nfsd4_create_session_rsize, 2201 }, 2202 [OP_DESTROY_SESSION] = { 2203 .op_func = (nfsd4op_func)nfsd4_destroy_session, 2204 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2205 | OP_MODIFIES_SOMETHING, 2206 .op_name = "OP_DESTROY_SESSION", 2207 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2208 }, 2209 [OP_SEQUENCE] = { 2210 .op_func = (nfsd4op_func)nfsd4_sequence, 2211 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 2212 .op_name = "OP_SEQUENCE", 2213 .op_rsize_bop = (nfsd4op_rsize)nfsd4_sequence_rsize, 2214 }, 2215 [OP_DESTROY_CLIENTID] = { 2216 .op_func = (nfsd4op_func)nfsd4_destroy_clientid, 2217 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2218 | OP_MODIFIES_SOMETHING, 2219 .op_name = "OP_DESTROY_CLIENTID", 2220 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2221 }, 2222 [OP_RECLAIM_COMPLETE] = { 2223 .op_func = (nfsd4op_func)nfsd4_reclaim_complete, 2224 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2225 .op_name = "OP_RECLAIM_COMPLETE", 2226 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2227 }, 2228 [OP_SECINFO_NO_NAME] = { 2229 .op_func = (nfsd4op_func)nfsd4_secinfo_no_name, 2230 .op_flags = OP_HANDLES_WRONGSEC, 2231 .op_name = "OP_SECINFO_NO_NAME", 2232 }, 2233 [OP_TEST_STATEID] = { 2234 .op_func = (nfsd4op_func)nfsd4_test_stateid, 2235 .op_flags = ALLOWED_WITHOUT_FH, 2236 .op_name = "OP_TEST_STATEID", 2237 }, 2238 [OP_FREE_STATEID] = { 2239 .op_func = (nfsd4op_func)nfsd4_free_stateid, 2240 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2241 .op_name = "OP_FREE_STATEID", 2242 .op_get_currentstateid = (stateid_getter)nfsd4_get_freestateid, 2243 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2244 }, 2245 #ifdef CONFIG_NFSD_PNFS 2246 [OP_GETDEVICEINFO] = { 2247 .op_func = (nfsd4op_func)nfsd4_getdeviceinfo, 2248 .op_flags = ALLOWED_WITHOUT_FH, 2249 .op_name = "OP_GETDEVICEINFO", 2250 }, 2251 [OP_LAYOUTGET] = { 2252 .op_func = (nfsd4op_func)nfsd4_layoutget, 2253 .op_flags = OP_MODIFIES_SOMETHING, 2254 .op_name = "OP_LAYOUTGET", 2255 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutget_rsize, 2256 }, 2257 [OP_LAYOUTCOMMIT] = { 2258 .op_func = (nfsd4op_func)nfsd4_layoutcommit, 2259 .op_flags = OP_MODIFIES_SOMETHING, 2260 .op_name = "OP_LAYOUTCOMMIT", 2261 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutcommit_rsize, 2262 }, 2263 [OP_LAYOUTRETURN] = { 2264 .op_func = (nfsd4op_func)nfsd4_layoutreturn, 2265 .op_flags = OP_MODIFIES_SOMETHING, 2266 .op_name = "OP_LAYOUTRETURN", 2267 .op_rsize_bop = (nfsd4op_rsize)nfsd4_layoutreturn_rsize, 2268 }, 2269 #endif /* CONFIG_NFSD_PNFS */ 2270 2271 /* NFSv4.2 operations */ 2272 [OP_ALLOCATE] = { 2273 .op_func = (nfsd4op_func)nfsd4_allocate, 2274 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2275 .op_name = "OP_ALLOCATE", 2276 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2277 }, 2278 [OP_DEALLOCATE] = { 2279 .op_func = (nfsd4op_func)nfsd4_deallocate, 2280 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2281 .op_name = "OP_DEALLOCATE", 2282 .op_rsize_bop = (nfsd4op_rsize)nfsd4_only_status_rsize, 2283 }, 2284 [OP_SEEK] = { 2285 .op_func = (nfsd4op_func)nfsd4_seek, 2286 .op_name = "OP_SEEK", 2287 }, 2288 }; 2289 2290 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 2291 { 2292 struct nfsd4_operation *opdesc; 2293 nfsd4op_rsize estimator; 2294 2295 if (op->opnum == OP_ILLEGAL) 2296 return op_encode_hdr_size * sizeof(__be32); 2297 opdesc = OPDESC(op); 2298 estimator = opdesc->op_rsize_bop; 2299 return estimator ? estimator(rqstp, op) : PAGE_SIZE; 2300 } 2301 2302 void warn_on_nonidempotent_op(struct nfsd4_op *op) 2303 { 2304 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 2305 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 2306 op->opnum, nfsd4_op_name(op->opnum)); 2307 WARN_ON_ONCE(1); 2308 } 2309 } 2310 2311 static const char *nfsd4_op_name(unsigned opnum) 2312 { 2313 if (opnum < ARRAY_SIZE(nfsd4_ops)) 2314 return nfsd4_ops[opnum].op_name; 2315 return "unknown_operation"; 2316 } 2317 2318 #define nfsd4_voidres nfsd4_voidargs 2319 struct nfsd4_voidargs { int dummy; }; 2320 2321 static struct svc_procedure nfsd_procedures4[2] = { 2322 [NFSPROC4_NULL] = { 2323 .pc_func = (svc_procfunc) nfsd4_proc_null, 2324 .pc_encode = (kxdrproc_t) nfs4svc_encode_voidres, 2325 .pc_argsize = sizeof(struct nfsd4_voidargs), 2326 .pc_ressize = sizeof(struct nfsd4_voidres), 2327 .pc_cachetype = RC_NOCACHE, 2328 .pc_xdrressize = 1, 2329 }, 2330 [NFSPROC4_COMPOUND] = { 2331 .pc_func = (svc_procfunc) nfsd4_proc_compound, 2332 .pc_decode = (kxdrproc_t) nfs4svc_decode_compoundargs, 2333 .pc_encode = (kxdrproc_t) nfs4svc_encode_compoundres, 2334 .pc_argsize = sizeof(struct nfsd4_compoundargs), 2335 .pc_ressize = sizeof(struct nfsd4_compoundres), 2336 .pc_release = nfsd4_release_compoundargs, 2337 .pc_cachetype = RC_NOCACHE, 2338 .pc_xdrressize = NFSD_BUFSIZE/4, 2339 }, 2340 }; 2341 2342 struct svc_version nfsd_version4 = { 2343 .vs_vers = 4, 2344 .vs_nproc = 2, 2345 .vs_proc = nfsd_procedures4, 2346 .vs_dispatch = nfsd_dispatch, 2347 .vs_xdrsize = NFS4_SVC_XDRSIZE, 2348 .vs_rpcb_optnl = 1, 2349 }; 2350 2351 /* 2352 * Local variables: 2353 * c-basic-offset: 8 2354 * End: 2355 */ 2356