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/fs_struct.h> 36 #include <linux/file.h> 37 #include <linux/falloc.h> 38 #include <linux/slab.h> 39 #include <linux/kthread.h> 40 #include <linux/sunrpc/addr.h> 41 42 #include "idmap.h" 43 #include "cache.h" 44 #include "xdr4.h" 45 #include "vfs.h" 46 #include "current_stateid.h" 47 #include "netns.h" 48 #include "acl.h" 49 #include "pnfs.h" 50 #include "trace.h" 51 52 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 53 #include <linux/security.h> 54 55 static inline void 56 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 57 { 58 struct inode *inode = d_inode(resfh->fh_dentry); 59 int status; 60 61 inode_lock(inode); 62 status = security_inode_setsecctx(resfh->fh_dentry, 63 label->data, label->len); 64 inode_unlock(inode); 65 66 if (status) 67 /* 68 * XXX: We should really fail the whole open, but we may 69 * already have created a new file, so it may be too 70 * late. For now this seems the least of evils: 71 */ 72 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 73 74 return; 75 } 76 #else 77 static inline void 78 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 79 { } 80 #endif 81 82 #define NFSDDBG_FACILITY NFSDDBG_PROC 83 84 static u32 nfsd_attrmask[] = { 85 NFSD_WRITEABLE_ATTRS_WORD0, 86 NFSD_WRITEABLE_ATTRS_WORD1, 87 NFSD_WRITEABLE_ATTRS_WORD2 88 }; 89 90 static u32 nfsd41_ex_attrmask[] = { 91 NFSD_SUPPATTR_EXCLCREAT_WORD0, 92 NFSD_SUPPATTR_EXCLCREAT_WORD1, 93 NFSD_SUPPATTR_EXCLCREAT_WORD2 94 }; 95 96 static __be32 97 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 98 u32 *bmval, u32 *writable) 99 { 100 struct dentry *dentry = cstate->current_fh.fh_dentry; 101 struct svc_export *exp = cstate->current_fh.fh_export; 102 103 if (!nfsd_attrs_supported(cstate->minorversion, bmval)) 104 return nfserr_attrnotsupp; 105 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry))) 106 return nfserr_attrnotsupp; 107 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) && 108 !(exp->ex_flags & NFSEXP_SECURITY_LABEL)) 109 return nfserr_attrnotsupp; 110 if (writable && !bmval_is_subset(bmval, writable)) 111 return nfserr_inval; 112 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) && 113 (bmval[1] & FATTR4_WORD1_MODE)) 114 return nfserr_inval; 115 return nfs_ok; 116 } 117 118 static __be32 119 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 120 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 121 { 122 __be32 status = nfs_ok; 123 124 if (open->op_create == NFS4_OPEN_CREATE) { 125 if (open->op_createmode == NFS4_CREATE_UNCHECKED 126 || open->op_createmode == NFS4_CREATE_GUARDED) 127 status = check_attr_support(rqstp, cstate, 128 open->op_bmval, nfsd_attrmask); 129 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 130 status = check_attr_support(rqstp, cstate, 131 open->op_bmval, nfsd41_ex_attrmask); 132 } 133 134 return status; 135 } 136 137 static int 138 is_create_with_attrs(struct nfsd4_open *open) 139 { 140 return open->op_create == NFS4_OPEN_CREATE 141 && (open->op_createmode == NFS4_CREATE_UNCHECKED 142 || open->op_createmode == NFS4_CREATE_GUARDED 143 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 144 } 145 146 /* 147 * if error occurs when setting the acl, just clear the acl bit 148 * in the returned attr bitmap. 149 */ 150 static void 151 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 152 struct nfs4_acl *acl, u32 *bmval) 153 { 154 __be32 status; 155 156 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 157 if (status) 158 /* 159 * We should probably fail the whole open at this point, 160 * but we've already created the file, so it's too late; 161 * So this seems the least of evils: 162 */ 163 bmval[0] &= ~FATTR4_WORD0_ACL; 164 } 165 166 static inline void 167 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 168 { 169 fh_put(dst); 170 dget(src->fh_dentry); 171 if (src->fh_export) 172 exp_get(src->fh_export); 173 *dst = *src; 174 } 175 176 static __be32 177 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 178 { 179 __be32 status; 180 181 if (open->op_truncate && 182 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 183 return nfserr_inval; 184 185 accmode |= NFSD_MAY_READ_IF_EXEC; 186 187 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 188 accmode |= NFSD_MAY_READ; 189 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 190 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 191 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 192 accmode |= NFSD_MAY_WRITE; 193 194 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 195 196 return status; 197 } 198 199 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 200 { 201 umode_t mode = d_inode(fh->fh_dentry)->i_mode; 202 203 if (S_ISREG(mode)) 204 return nfs_ok; 205 if (S_ISDIR(mode)) 206 return nfserr_isdir; 207 /* 208 * Using err_symlink as our catch-all case may look odd; but 209 * there's no other obvious error for this case in 4.0, and we 210 * happen to know that it will cause the linux v4 client to do 211 * the right thing on attempts to open something other than a 212 * regular file. 213 */ 214 return nfserr_symlink; 215 } 216 217 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 218 { 219 if (nfsd4_has_session(cstate)) 220 return; 221 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 222 &resfh->fh_handle); 223 } 224 225 static __be32 226 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) 227 { 228 struct svc_fh *current_fh = &cstate->current_fh; 229 int accmode; 230 __be32 status; 231 232 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 233 if (!*resfh) 234 return nfserr_jukebox; 235 fh_init(*resfh, NFS4_FHSIZE); 236 open->op_truncate = false; 237 238 if (open->op_create) { 239 /* FIXME: check session persistence and pnfs flags. 240 * The nfsv4.1 spec requires the following semantics: 241 * 242 * Persistent | pNFS | Server REQUIRED | Client Allowed 243 * Reply Cache | server | | 244 * -------------+--------+-----------------+-------------------- 245 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 246 * | | | (SHOULD) 247 * | | and EXCLUSIVE4 | or EXCLUSIVE4 248 * | | | (SHOULD NOT) 249 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 250 * yes | no | GUARDED4 | GUARDED4 251 * yes | yes | GUARDED4 | GUARDED4 252 */ 253 254 /* 255 * Note: create modes (UNCHECKED,GUARDED...) are the same 256 * in NFSv4 as in v3 except EXCLUSIVE4_1. 257 */ 258 current->fs->umask = open->op_umask; 259 status = do_nfsd_create(rqstp, current_fh, open->op_fname.data, 260 open->op_fname.len, &open->op_iattr, 261 *resfh, open->op_createmode, 262 (u32 *)open->op_verf.data, 263 &open->op_truncate, &open->op_created); 264 current->fs->umask = 0; 265 266 if (!status && open->op_label.len) 267 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); 268 269 /* 270 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4 271 * use the returned bitmask to indicate which attributes 272 * we used to store the verifier: 273 */ 274 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0) 275 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS | 276 FATTR4_WORD1_TIME_MODIFY); 277 } else 278 /* 279 * Note this may exit with the parent still locked. 280 * We will hold the lock until nfsd4_open's final 281 * lookup, to prevent renames or unlinks until we've had 282 * a chance to an acquire a delegation if appropriate. 283 */ 284 status = nfsd_lookup(rqstp, current_fh, 285 open->op_fname.data, open->op_fname.len, *resfh); 286 if (status) 287 goto out; 288 status = nfsd_check_obj_isreg(*resfh); 289 if (status) 290 goto out; 291 292 if (is_create_with_attrs(open) && open->op_acl != NULL) 293 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); 294 295 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); 296 accmode = NFSD_MAY_NOP; 297 if (open->op_created || 298 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 299 accmode |= NFSD_MAY_OWNER_OVERRIDE; 300 status = do_open_permission(rqstp, *resfh, open, accmode); 301 set_change_info(&open->op_cinfo, current_fh); 302 out: 303 return status; 304 } 305 306 static __be32 307 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 308 { 309 struct svc_fh *current_fh = &cstate->current_fh; 310 __be32 status; 311 int accmode = 0; 312 313 /* We don't know the target directory, and therefore can not 314 * set the change info 315 */ 316 317 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 318 319 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 320 321 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 322 (open->op_iattr.ia_size == 0); 323 /* 324 * In the delegation case, the client is telling us about an 325 * open that it *already* performed locally, some time ago. We 326 * should let it succeed now if possible. 327 * 328 * In the case of a CLAIM_FH open, on the other hand, the client 329 * may be counting on us to enforce permissions (the Linux 4.1 330 * client uses this for normal opens, for example). 331 */ 332 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 333 accmode = NFSD_MAY_OWNER_OVERRIDE; 334 335 status = do_open_permission(rqstp, current_fh, open, accmode); 336 337 return status; 338 } 339 340 static void 341 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 342 { 343 struct nfsd4_sessionid *sid = 344 (struct nfsd4_sessionid *)session->se_sessionid.data; 345 346 clid->cl_boot = sid->clientid.cl_boot; 347 clid->cl_id = sid->clientid.cl_id; 348 } 349 350 static __be32 351 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 352 union nfsd4_op_u *u) 353 { 354 struct nfsd4_open *open = &u->open; 355 __be32 status; 356 struct svc_fh *resfh = NULL; 357 struct net *net = SVC_NET(rqstp); 358 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 359 bool reclaim = false; 360 361 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 362 (int)open->op_fname.len, open->op_fname.data, 363 open->op_openowner); 364 365 /* This check required by spec. */ 366 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 367 return nfserr_inval; 368 369 open->op_created = false; 370 /* 371 * RFC5661 18.51.3 372 * Before RECLAIM_COMPLETE done, server should deny new lock 373 */ 374 if (nfsd4_has_session(cstate) && 375 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 376 &cstate->session->se_client->cl_flags) && 377 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 378 return nfserr_grace; 379 380 if (nfsd4_has_session(cstate)) 381 copy_clientid(&open->op_clientid, cstate->session); 382 383 /* check seqid for replay. set nfs4_owner */ 384 status = nfsd4_process_open1(cstate, open, nn); 385 if (status == nfserr_replay_me) { 386 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 387 fh_put(&cstate->current_fh); 388 fh_copy_shallow(&cstate->current_fh.fh_handle, 389 &rp->rp_openfh); 390 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 391 if (status) 392 dprintk("nfsd4_open: replay failed" 393 " restoring previous filehandle\n"); 394 else 395 status = nfserr_replay_me; 396 } 397 if (status) 398 goto out; 399 if (open->op_xdr_error) { 400 status = open->op_xdr_error; 401 goto out; 402 } 403 404 status = nfsd4_check_open_attributes(rqstp, cstate, open); 405 if (status) 406 goto out; 407 408 /* Openowner is now set, so sequence id will get bumped. Now we need 409 * these checks before we do any creates: */ 410 status = nfserr_grace; 411 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 412 goto out; 413 status = nfserr_no_grace; 414 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 415 goto out; 416 417 switch (open->op_claim_type) { 418 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 419 case NFS4_OPEN_CLAIM_NULL: 420 status = do_open_lookup(rqstp, cstate, open, &resfh); 421 if (status) 422 goto out; 423 break; 424 case NFS4_OPEN_CLAIM_PREVIOUS: 425 status = nfs4_check_open_reclaim(&open->op_clientid, 426 cstate, nn); 427 if (status) 428 goto out; 429 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 430 reclaim = true; 431 /* fall through */ 432 case NFS4_OPEN_CLAIM_FH: 433 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 434 status = do_open_fhandle(rqstp, cstate, open); 435 if (status) 436 goto out; 437 resfh = &cstate->current_fh; 438 break; 439 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 440 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 441 dprintk("NFSD: unsupported OPEN claim type %d\n", 442 open->op_claim_type); 443 status = nfserr_notsupp; 444 goto out; 445 default: 446 dprintk("NFSD: Invalid OPEN claim type %d\n", 447 open->op_claim_type); 448 status = nfserr_inval; 449 goto out; 450 } 451 /* 452 * nfsd4_process_open2() does the actual opening of the file. If 453 * successful, it (1) truncates the file if open->op_truncate was 454 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 455 */ 456 status = nfsd4_process_open2(rqstp, resfh, open); 457 WARN(status && open->op_created, 458 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 459 be32_to_cpu(status)); 460 if (reclaim && !status) 461 nn->somebody_reclaimed = true; 462 out: 463 if (resfh && resfh != &cstate->current_fh) { 464 fh_dup2(&cstate->current_fh, resfh); 465 fh_put(resfh); 466 kfree(resfh); 467 } 468 nfsd4_cleanup_open_state(cstate, open); 469 nfsd4_bump_seqid(cstate, status); 470 return status; 471 } 472 473 /* 474 * OPEN is the only seqid-mutating operation whose decoding can fail 475 * with a seqid-mutating error (specifically, decoding of user names in 476 * the attributes). Therefore we have to do some processing to look up 477 * the stateowner so that we can bump the seqid. 478 */ 479 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 480 { 481 struct nfsd4_open *open = &op->u.open; 482 483 if (!seqid_mutating_err(ntohl(op->status))) 484 return op->status; 485 if (nfsd4_has_session(cstate)) 486 return op->status; 487 open->op_xdr_error = op->status; 488 return nfsd4_open(rqstp, cstate, &op->u); 489 } 490 491 /* 492 * filehandle-manipulating ops. 493 */ 494 static __be32 495 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 496 union nfsd4_op_u *u) 497 { 498 u->getfh = &cstate->current_fh; 499 return nfs_ok; 500 } 501 502 static __be32 503 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 504 union nfsd4_op_u *u) 505 { 506 struct nfsd4_putfh *putfh = &u->putfh; 507 __be32 ret; 508 509 fh_put(&cstate->current_fh); 510 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 511 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 512 putfh->pf_fhlen); 513 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 514 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 515 if (ret == nfserr_stale && putfh->no_verify) { 516 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN); 517 ret = 0; 518 } 519 #endif 520 return ret; 521 } 522 523 static __be32 524 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 525 union nfsd4_op_u *u) 526 { 527 __be32 status; 528 529 fh_put(&cstate->current_fh); 530 status = exp_pseudoroot(rqstp, &cstate->current_fh); 531 return status; 532 } 533 534 static __be32 535 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 536 union nfsd4_op_u *u) 537 { 538 if (!cstate->save_fh.fh_dentry) 539 return nfserr_restorefh; 540 541 fh_dup2(&cstate->current_fh, &cstate->save_fh); 542 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) { 543 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 544 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); 545 } 546 return nfs_ok; 547 } 548 549 static __be32 550 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 551 union nfsd4_op_u *u) 552 { 553 fh_dup2(&cstate->save_fh, &cstate->current_fh); 554 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) { 555 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 556 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG); 557 } 558 return nfs_ok; 559 } 560 561 /* 562 * misc nfsv4 ops 563 */ 564 static __be32 565 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 566 union nfsd4_op_u *u) 567 { 568 struct nfsd4_access *access = &u->access; 569 570 if (access->ac_req_access & ~NFS3_ACCESS_FULL) 571 return nfserr_inval; 572 573 access->ac_resp_access = access->ac_req_access; 574 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 575 &access->ac_supported); 576 } 577 578 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 579 { 580 __be32 *verf = (__be32 *)verifier->data; 581 582 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data)); 583 584 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id)); 585 } 586 587 static __be32 588 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 589 union nfsd4_op_u *u) 590 { 591 struct nfsd4_commit *commit = &u->commit; 592 593 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 594 commit->co_count, 595 (__be32 *)commit->co_verf.data); 596 } 597 598 static __be32 599 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 600 union nfsd4_op_u *u) 601 { 602 struct nfsd4_create *create = &u->create; 603 struct svc_fh resfh; 604 __be32 status; 605 dev_t rdev; 606 607 fh_init(&resfh, NFS4_FHSIZE); 608 609 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP); 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 current->fs->umask = create->cr_umask; 619 switch (create->cr_type) { 620 case NF4LNK: 621 status = nfsd_symlink(rqstp, &cstate->current_fh, 622 create->cr_name, create->cr_namelen, 623 create->cr_data, &resfh); 624 break; 625 626 case NF4BLK: 627 status = nfserr_inval; 628 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 629 if (MAJOR(rdev) != create->cr_specdata1 || 630 MINOR(rdev) != create->cr_specdata2) 631 goto out_umask; 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 status = nfserr_inval; 639 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 640 if (MAJOR(rdev) != create->cr_specdata1 || 641 MINOR(rdev) != create->cr_specdata2) 642 goto out_umask; 643 status = nfsd_create(rqstp, &cstate->current_fh, 644 create->cr_name, create->cr_namelen, 645 &create->cr_iattr,S_IFCHR, rdev, &resfh); 646 break; 647 648 case NF4SOCK: 649 status = nfsd_create(rqstp, &cstate->current_fh, 650 create->cr_name, create->cr_namelen, 651 &create->cr_iattr, S_IFSOCK, 0, &resfh); 652 break; 653 654 case NF4FIFO: 655 status = nfsd_create(rqstp, &cstate->current_fh, 656 create->cr_name, create->cr_namelen, 657 &create->cr_iattr, S_IFIFO, 0, &resfh); 658 break; 659 660 case NF4DIR: 661 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 662 status = nfsd_create(rqstp, &cstate->current_fh, 663 create->cr_name, create->cr_namelen, 664 &create->cr_iattr, S_IFDIR, 0, &resfh); 665 break; 666 667 default: 668 status = nfserr_badtype; 669 } 670 671 if (status) 672 goto out; 673 674 if (create->cr_label.len) 675 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 676 677 if (create->cr_acl != NULL) 678 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 679 create->cr_bmval); 680 681 fh_unlock(&cstate->current_fh); 682 set_change_info(&create->cr_cinfo, &cstate->current_fh); 683 fh_dup2(&cstate->current_fh, &resfh); 684 out: 685 fh_put(&resfh); 686 out_umask: 687 current->fs->umask = 0; 688 return status; 689 } 690 691 static __be32 692 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 693 union nfsd4_op_u *u) 694 { 695 struct nfsd4_getattr *getattr = &u->getattr; 696 __be32 status; 697 698 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 699 if (status) 700 return status; 701 702 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 703 return nfserr_inval; 704 705 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 706 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 707 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 708 709 getattr->ga_fhp = &cstate->current_fh; 710 return nfs_ok; 711 } 712 713 static __be32 714 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 715 union nfsd4_op_u *u) 716 { 717 struct nfsd4_link *link = &u->link; 718 __be32 status; 719 720 status = nfsd_link(rqstp, &cstate->current_fh, 721 link->li_name, link->li_namelen, &cstate->save_fh); 722 if (!status) 723 set_change_info(&link->li_cinfo, &cstate->current_fh); 724 return status; 725 } 726 727 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 728 { 729 struct svc_fh tmp_fh; 730 __be32 ret; 731 732 fh_init(&tmp_fh, NFS4_FHSIZE); 733 ret = exp_pseudoroot(rqstp, &tmp_fh); 734 if (ret) 735 return ret; 736 if (tmp_fh.fh_dentry == fh->fh_dentry) { 737 fh_put(&tmp_fh); 738 return nfserr_noent; 739 } 740 fh_put(&tmp_fh); 741 return nfsd_lookup(rqstp, fh, "..", 2, fh); 742 } 743 744 static __be32 745 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 746 union nfsd4_op_u *u) 747 { 748 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 749 } 750 751 static __be32 752 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 753 union nfsd4_op_u *u) 754 { 755 return nfsd_lookup(rqstp, &cstate->current_fh, 756 u->lookup.lo_name, u->lookup.lo_len, 757 &cstate->current_fh); 758 } 759 760 static __be32 761 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 762 union nfsd4_op_u *u) 763 { 764 struct nfsd4_read *read = &u->read; 765 __be32 status; 766 767 read->rd_nf = NULL; 768 if (read->rd_offset >= OFFSET_MAX) 769 return nfserr_inval; 770 771 trace_nfsd_read_start(rqstp, &cstate->current_fh, 772 read->rd_offset, read->rd_length); 773 774 /* 775 * If we do a zero copy read, then a client will see read data 776 * that reflects the state of the file *after* performing the 777 * following compound. 778 * 779 * To ensure proper ordering, we therefore turn off zero copy if 780 * the client wants us to do more in this compound: 781 */ 782 if (!nfsd4_last_compound_op(rqstp)) 783 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 784 785 /* check stateid */ 786 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 787 &read->rd_stateid, RD_STATE, 788 &read->rd_nf, NULL); 789 if (status) { 790 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 791 goto out; 792 } 793 status = nfs_ok; 794 out: 795 read->rd_rqstp = rqstp; 796 read->rd_fhp = &cstate->current_fh; 797 return status; 798 } 799 800 801 static void 802 nfsd4_read_release(union nfsd4_op_u *u) 803 { 804 if (u->read.rd_nf) 805 nfsd_file_put(u->read.rd_nf); 806 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp, 807 u->read.rd_offset, u->read.rd_length); 808 } 809 810 static __be32 811 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 812 union nfsd4_op_u *u) 813 { 814 struct nfsd4_readdir *readdir = &u->readdir; 815 u64 cookie = readdir->rd_cookie; 816 static const nfs4_verifier zeroverf; 817 818 /* no need to check permission - this will be done in nfsd_readdir() */ 819 820 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 821 return nfserr_inval; 822 823 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 824 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 825 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 826 827 if ((cookie == 1) || (cookie == 2) || 828 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 829 return nfserr_bad_cookie; 830 831 readdir->rd_rqstp = rqstp; 832 readdir->rd_fhp = &cstate->current_fh; 833 return nfs_ok; 834 } 835 836 static __be32 837 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 838 union nfsd4_op_u *u) 839 { 840 u->readlink.rl_rqstp = rqstp; 841 u->readlink.rl_fhp = &cstate->current_fh; 842 return nfs_ok; 843 } 844 845 static __be32 846 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 847 union nfsd4_op_u *u) 848 { 849 struct nfsd4_remove *remove = &u->remove; 850 __be32 status; 851 852 if (opens_in_grace(SVC_NET(rqstp))) 853 return nfserr_grace; 854 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 855 remove->rm_name, remove->rm_namelen); 856 if (!status) { 857 fh_unlock(&cstate->current_fh); 858 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 859 } 860 return status; 861 } 862 863 static __be32 864 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 865 union nfsd4_op_u *u) 866 { 867 struct nfsd4_rename *rename = &u->rename; 868 __be32 status; 869 870 if (opens_in_grace(SVC_NET(rqstp))) 871 return nfserr_grace; 872 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 873 rename->rn_snamelen, &cstate->current_fh, 874 rename->rn_tname, rename->rn_tnamelen); 875 if (status) 876 return status; 877 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 878 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 879 return nfs_ok; 880 } 881 882 static __be32 883 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 884 union nfsd4_op_u *u) 885 { 886 struct nfsd4_secinfo *secinfo = &u->secinfo; 887 struct svc_export *exp; 888 struct dentry *dentry; 889 __be32 err; 890 891 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 892 if (err) 893 return err; 894 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 895 secinfo->si_name, secinfo->si_namelen, 896 &exp, &dentry); 897 if (err) 898 return err; 899 fh_unlock(&cstate->current_fh); 900 if (d_really_is_negative(dentry)) { 901 exp_put(exp); 902 err = nfserr_noent; 903 } else 904 secinfo->si_exp = exp; 905 dput(dentry); 906 if (cstate->minorversion) 907 /* See rfc 5661 section 2.6.3.1.1.8 */ 908 fh_put(&cstate->current_fh); 909 return err; 910 } 911 912 static __be32 913 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 914 union nfsd4_op_u *u) 915 { 916 __be32 err; 917 918 switch (u->secinfo_no_name.sin_style) { 919 case NFS4_SECINFO_STYLE4_CURRENT_FH: 920 break; 921 case NFS4_SECINFO_STYLE4_PARENT: 922 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 923 if (err) 924 return err; 925 break; 926 default: 927 return nfserr_inval; 928 } 929 930 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export); 931 fh_put(&cstate->current_fh); 932 return nfs_ok; 933 } 934 935 static void 936 nfsd4_secinfo_release(union nfsd4_op_u *u) 937 { 938 if (u->secinfo.si_exp) 939 exp_put(u->secinfo.si_exp); 940 } 941 942 static void 943 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u) 944 { 945 if (u->secinfo_no_name.sin_exp) 946 exp_put(u->secinfo_no_name.sin_exp); 947 } 948 949 static __be32 950 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 951 union nfsd4_op_u *u) 952 { 953 struct nfsd4_setattr *setattr = &u->setattr; 954 __be32 status = nfs_ok; 955 int err; 956 957 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 958 status = nfs4_preprocess_stateid_op(rqstp, cstate, 959 &cstate->current_fh, &setattr->sa_stateid, 960 WR_STATE, NULL, NULL); 961 if (status) { 962 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 963 return status; 964 } 965 } 966 err = fh_want_write(&cstate->current_fh); 967 if (err) 968 return nfserrno(err); 969 status = nfs_ok; 970 971 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 972 nfsd_attrmask); 973 if (status) 974 goto out; 975 976 if (setattr->sa_acl != NULL) 977 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 978 setattr->sa_acl); 979 if (status) 980 goto out; 981 if (setattr->sa_label.len) 982 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 983 &setattr->sa_label); 984 if (status) 985 goto out; 986 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 987 0, (time64_t)0); 988 out: 989 fh_drop_write(&cstate->current_fh); 990 return status; 991 } 992 993 static __be32 994 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 995 union nfsd4_op_u *u) 996 { 997 struct nfsd4_write *write = &u->write; 998 stateid_t *stateid = &write->wr_stateid; 999 struct nfsd_file *nf = NULL; 1000 __be32 status = nfs_ok; 1001 unsigned long cnt; 1002 int nvecs; 1003 1004 if (write->wr_offset >= OFFSET_MAX) 1005 return nfserr_inval; 1006 1007 cnt = write->wr_buflen; 1008 trace_nfsd_write_start(rqstp, &cstate->current_fh, 1009 write->wr_offset, cnt); 1010 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1011 stateid, WR_STATE, &nf, NULL); 1012 if (status) { 1013 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 1014 return status; 1015 } 1016 1017 write->wr_how_written = write->wr_stable_how; 1018 1019 nvecs = svc_fill_write_vector(rqstp, write->wr_pagelist, 1020 &write->wr_head, write->wr_buflen); 1021 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1022 1023 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf, 1024 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 1025 write->wr_how_written, 1026 (__be32 *)write->wr_verifier.data); 1027 nfsd_file_put(nf); 1028 1029 write->wr_bytes_written = cnt; 1030 trace_nfsd_write_done(rqstp, &cstate->current_fh, 1031 write->wr_offset, cnt); 1032 return status; 1033 } 1034 1035 static __be32 1036 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1037 stateid_t *src_stateid, struct nfsd_file **src, 1038 stateid_t *dst_stateid, struct nfsd_file **dst) 1039 { 1040 __be32 status; 1041 1042 if (!cstate->save_fh.fh_dentry) 1043 return nfserr_nofilehandle; 1044 1045 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, 1046 src_stateid, RD_STATE, src, NULL); 1047 if (status) { 1048 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); 1049 goto out; 1050 } 1051 1052 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1053 dst_stateid, WR_STATE, dst, NULL); 1054 if (status) { 1055 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); 1056 goto out_put_src; 1057 } 1058 1059 /* fix up for NFS-specific error code */ 1060 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) || 1061 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) { 1062 status = nfserr_wrong_type; 1063 goto out_put_dst; 1064 } 1065 1066 out: 1067 return status; 1068 out_put_dst: 1069 nfsd_file_put(*dst); 1070 out_put_src: 1071 nfsd_file_put(*src); 1072 goto out; 1073 } 1074 1075 static __be32 1076 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1077 union nfsd4_op_u *u) 1078 { 1079 struct nfsd4_clone *clone = &u->clone; 1080 struct nfsd_file *src, *dst; 1081 __be32 status; 1082 1083 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src, 1084 &clone->cl_dst_stateid, &dst); 1085 if (status) 1086 goto out; 1087 1088 status = nfsd4_clone_file_range(src, clone->cl_src_pos, 1089 dst, clone->cl_dst_pos, clone->cl_count, 1090 EX_ISSYNC(cstate->current_fh.fh_export)); 1091 1092 nfsd_file_put(dst); 1093 nfsd_file_put(src); 1094 out: 1095 return status; 1096 } 1097 1098 void nfs4_put_copy(struct nfsd4_copy *copy) 1099 { 1100 if (!refcount_dec_and_test(©->refcount)) 1101 return; 1102 kfree(copy); 1103 } 1104 1105 static bool 1106 check_and_set_stop_copy(struct nfsd4_copy *copy) 1107 { 1108 bool value; 1109 1110 spin_lock(©->cp_clp->async_lock); 1111 value = copy->stopped; 1112 if (!copy->stopped) 1113 copy->stopped = true; 1114 spin_unlock(©->cp_clp->async_lock); 1115 return value; 1116 } 1117 1118 static void nfsd4_stop_copy(struct nfsd4_copy *copy) 1119 { 1120 /* only 1 thread should stop the copy */ 1121 if (!check_and_set_stop_copy(copy)) 1122 kthread_stop(copy->copy_task); 1123 nfs4_put_copy(copy); 1124 } 1125 1126 static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp) 1127 { 1128 struct nfsd4_copy *copy = NULL; 1129 1130 spin_lock(&clp->async_lock); 1131 if (!list_empty(&clp->async_copies)) { 1132 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy, 1133 copies); 1134 refcount_inc(©->refcount); 1135 } 1136 spin_unlock(&clp->async_lock); 1137 return copy; 1138 } 1139 1140 void nfsd4_shutdown_copy(struct nfs4_client *clp) 1141 { 1142 struct nfsd4_copy *copy; 1143 1144 while ((copy = nfsd4_get_copy(clp)) != NULL) 1145 nfsd4_stop_copy(copy); 1146 } 1147 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 1148 1149 extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, 1150 struct nfs_fh *src_fh, 1151 nfs4_stateid *stateid); 1152 extern void nfs42_ssc_close(struct file *filep); 1153 1154 extern void nfs_sb_deactive(struct super_block *sb); 1155 1156 #define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys" 1157 1158 /** 1159 * Support one copy source server for now. 1160 */ 1161 static __be32 1162 nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp, 1163 struct vfsmount **mount) 1164 { 1165 struct file_system_type *type; 1166 struct vfsmount *ss_mnt; 1167 struct nfs42_netaddr *naddr; 1168 struct sockaddr_storage tmp_addr; 1169 size_t tmp_addrlen, match_netid_len = 3; 1170 char *startsep = "", *endsep = "", *match_netid = "tcp"; 1171 char *ipaddr, *dev_name, *raw_data; 1172 int len, raw_len; 1173 __be32 status = nfserr_inval; 1174 1175 naddr = &nss->u.nl4_addr; 1176 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr, 1177 naddr->addr_len, 1178 (struct sockaddr *)&tmp_addr, 1179 sizeof(tmp_addr)); 1180 if (tmp_addrlen == 0) 1181 goto out_err; 1182 1183 if (tmp_addr.ss_family == AF_INET6) { 1184 startsep = "["; 1185 endsep = "]"; 1186 match_netid = "tcp6"; 1187 match_netid_len = 4; 1188 } 1189 1190 if (naddr->netid_len != match_netid_len || 1191 strncmp(naddr->netid, match_netid, naddr->netid_len)) 1192 goto out_err; 1193 1194 /* Construct the raw data for the vfs_kern_mount call */ 1195 len = RPC_MAX_ADDRBUFLEN + 1; 1196 ipaddr = kzalloc(len, GFP_KERNEL); 1197 if (!ipaddr) 1198 goto out_err; 1199 1200 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len); 1201 1202 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/ 1203 1204 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr); 1205 raw_data = kzalloc(raw_len, GFP_KERNEL); 1206 if (!raw_data) 1207 goto out_free_ipaddr; 1208 1209 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr); 1210 1211 status = nfserr_nodev; 1212 type = get_fs_type("nfs"); 1213 if (!type) 1214 goto out_free_rawdata; 1215 1216 /* Set the server:<export> for the vfs_kern_mount call */ 1217 dev_name = kzalloc(len + 5, GFP_KERNEL); 1218 if (!dev_name) 1219 goto out_free_rawdata; 1220 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep); 1221 1222 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */ 1223 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data); 1224 module_put(type->owner); 1225 if (IS_ERR(ss_mnt)) 1226 goto out_free_devname; 1227 1228 status = 0; 1229 *mount = ss_mnt; 1230 1231 out_free_devname: 1232 kfree(dev_name); 1233 out_free_rawdata: 1234 kfree(raw_data); 1235 out_free_ipaddr: 1236 kfree(ipaddr); 1237 out_err: 1238 return status; 1239 } 1240 1241 static void 1242 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt) 1243 { 1244 nfs_sb_deactive(ss_mnt->mnt_sb); 1245 mntput(ss_mnt); 1246 } 1247 1248 /** 1249 * nfsd4_setup_inter_ssc 1250 * 1251 * Verify COPY destination stateid. 1252 * Connect to the source server with NFSv4.1. 1253 * Create the source struct file for nfsd_copy_range. 1254 * Called with COPY cstate: 1255 * SAVED_FH: source filehandle 1256 * CURRENT_FH: destination filehandle 1257 */ 1258 static __be32 1259 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, 1260 struct nfsd4_compound_state *cstate, 1261 struct nfsd4_copy *copy, struct vfsmount **mount) 1262 { 1263 struct svc_fh *s_fh = NULL; 1264 stateid_t *s_stid = ©->cp_src_stateid; 1265 __be32 status = nfserr_inval; 1266 1267 /* Verify the destination stateid and set dst struct file*/ 1268 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1269 ©->cp_dst_stateid, 1270 WR_STATE, ©->nf_dst, NULL); 1271 if (status) 1272 goto out; 1273 1274 status = nfsd4_interssc_connect(©->cp_src, rqstp, mount); 1275 if (status) 1276 goto out; 1277 1278 s_fh = &cstate->save_fh; 1279 1280 copy->c_fh.size = s_fh->fh_handle.fh_size; 1281 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size); 1282 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation); 1283 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque, 1284 sizeof(stateid_opaque_t)); 1285 1286 status = 0; 1287 out: 1288 return status; 1289 } 1290 1291 static void 1292 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src, 1293 struct nfsd_file *dst) 1294 { 1295 nfs42_ssc_close(src->nf_file); 1296 nfsd_file_put(src); 1297 nfsd_file_put(dst); 1298 mntput(ss_mnt); 1299 } 1300 1301 #else /* CONFIG_NFSD_V4_2_INTER_SSC */ 1302 1303 static __be32 1304 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, 1305 struct nfsd4_compound_state *cstate, 1306 struct nfsd4_copy *copy, 1307 struct vfsmount **mount) 1308 { 1309 *mount = NULL; 1310 return nfserr_inval; 1311 } 1312 1313 static void 1314 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src, 1315 struct nfsd_file *dst) 1316 { 1317 } 1318 1319 static void 1320 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt) 1321 { 1322 } 1323 1324 static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, 1325 struct nfs_fh *src_fh, 1326 nfs4_stateid *stateid) 1327 { 1328 return NULL; 1329 } 1330 #endif /* CONFIG_NFSD_V4_2_INTER_SSC */ 1331 1332 static __be32 1333 nfsd4_setup_intra_ssc(struct svc_rqst *rqstp, 1334 struct nfsd4_compound_state *cstate, 1335 struct nfsd4_copy *copy) 1336 { 1337 return nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, 1338 ©->nf_src, ©->cp_dst_stateid, 1339 ©->nf_dst); 1340 } 1341 1342 static void 1343 nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst) 1344 { 1345 nfsd_file_put(src); 1346 nfsd_file_put(dst); 1347 } 1348 1349 static void nfsd4_cb_offload_release(struct nfsd4_callback *cb) 1350 { 1351 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb); 1352 1353 nfs4_put_copy(copy); 1354 } 1355 1356 static int nfsd4_cb_offload_done(struct nfsd4_callback *cb, 1357 struct rpc_task *task) 1358 { 1359 return 1; 1360 } 1361 1362 static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = { 1363 .release = nfsd4_cb_offload_release, 1364 .done = nfsd4_cb_offload_done 1365 }; 1366 1367 static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync) 1368 { 1369 copy->cp_res.wr_stable_how = NFS_UNSTABLE; 1370 copy->cp_synchronous = sync; 1371 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net); 1372 } 1373 1374 static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy) 1375 { 1376 ssize_t bytes_copied = 0; 1377 size_t bytes_total = copy->cp_count; 1378 u64 src_pos = copy->cp_src_pos; 1379 u64 dst_pos = copy->cp_dst_pos; 1380 1381 do { 1382 if (kthread_should_stop()) 1383 break; 1384 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file, 1385 src_pos, copy->nf_dst->nf_file, dst_pos, 1386 bytes_total); 1387 if (bytes_copied <= 0) 1388 break; 1389 bytes_total -= bytes_copied; 1390 copy->cp_res.wr_bytes_written += bytes_copied; 1391 src_pos += bytes_copied; 1392 dst_pos += bytes_copied; 1393 } while (bytes_total > 0 && !copy->cp_synchronous); 1394 return bytes_copied; 1395 } 1396 1397 static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync) 1398 { 1399 __be32 status; 1400 ssize_t bytes; 1401 1402 bytes = _nfsd_copy_file_range(copy); 1403 /* for async copy, we ignore the error, client can always retry 1404 * to get the error 1405 */ 1406 if (bytes < 0 && !copy->cp_res.wr_bytes_written) 1407 status = nfserrno(bytes); 1408 else { 1409 nfsd4_init_copy_res(copy, sync); 1410 status = nfs_ok; 1411 } 1412 1413 if (!copy->cp_intra) /* Inter server SSC */ 1414 nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src, 1415 copy->nf_dst); 1416 else 1417 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst); 1418 1419 return status; 1420 } 1421 1422 static int dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst) 1423 { 1424 dst->cp_src_pos = src->cp_src_pos; 1425 dst->cp_dst_pos = src->cp_dst_pos; 1426 dst->cp_count = src->cp_count; 1427 dst->cp_synchronous = src->cp_synchronous; 1428 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res)); 1429 memcpy(&dst->fh, &src->fh, sizeof(src->fh)); 1430 dst->cp_clp = src->cp_clp; 1431 dst->nf_dst = nfsd_file_get(src->nf_dst); 1432 dst->cp_intra = src->cp_intra; 1433 if (src->cp_intra) /* for inter, file_src doesn't exist yet */ 1434 dst->nf_src = nfsd_file_get(src->nf_src); 1435 1436 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid)); 1437 memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server)); 1438 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid)); 1439 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh)); 1440 dst->ss_mnt = src->ss_mnt; 1441 1442 return 0; 1443 } 1444 1445 static void cleanup_async_copy(struct nfsd4_copy *copy) 1446 { 1447 nfs4_free_copy_state(copy); 1448 nfsd_file_put(copy->nf_dst); 1449 if (copy->cp_intra) 1450 nfsd_file_put(copy->nf_src); 1451 spin_lock(©->cp_clp->async_lock); 1452 list_del(©->copies); 1453 spin_unlock(©->cp_clp->async_lock); 1454 nfs4_put_copy(copy); 1455 } 1456 1457 static int nfsd4_do_async_copy(void *data) 1458 { 1459 struct nfsd4_copy *copy = (struct nfsd4_copy *)data; 1460 struct nfsd4_copy *cb_copy; 1461 1462 if (!copy->cp_intra) { /* Inter server SSC */ 1463 copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL); 1464 if (!copy->nf_src) { 1465 copy->nfserr = nfserr_serverfault; 1466 nfsd4_interssc_disconnect(copy->ss_mnt); 1467 goto do_callback; 1468 } 1469 copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, ©->c_fh, 1470 ©->stateid); 1471 if (IS_ERR(copy->nf_src->nf_file)) { 1472 copy->nfserr = nfserr_offload_denied; 1473 nfsd4_interssc_disconnect(copy->ss_mnt); 1474 goto do_callback; 1475 } 1476 } 1477 1478 copy->nfserr = nfsd4_do_copy(copy, 0); 1479 do_callback: 1480 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1481 if (!cb_copy) 1482 goto out; 1483 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res)); 1484 cb_copy->cp_clp = copy->cp_clp; 1485 cb_copy->nfserr = copy->nfserr; 1486 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh)); 1487 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp, 1488 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD); 1489 nfsd4_run_cb(&cb_copy->cp_cb); 1490 out: 1491 if (!copy->cp_intra) 1492 kfree(copy->nf_src); 1493 cleanup_async_copy(copy); 1494 return 0; 1495 } 1496 1497 static __be32 1498 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1499 union nfsd4_op_u *u) 1500 { 1501 struct nfsd4_copy *copy = &u->copy; 1502 __be32 status; 1503 struct nfsd4_copy *async_copy = NULL; 1504 1505 if (!copy->cp_intra) { /* Inter server SSC */ 1506 if (!inter_copy_offload_enable || copy->cp_synchronous) { 1507 status = nfserr_notsupp; 1508 goto out; 1509 } 1510 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy, 1511 ©->ss_mnt); 1512 if (status) 1513 return nfserr_offload_denied; 1514 } else { 1515 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy); 1516 if (status) 1517 return status; 1518 } 1519 1520 copy->cp_clp = cstate->clp; 1521 memcpy(©->fh, &cstate->current_fh.fh_handle, 1522 sizeof(struct knfsd_fh)); 1523 if (!copy->cp_synchronous) { 1524 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1525 1526 status = nfserrno(-ENOMEM); 1527 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1528 if (!async_copy) 1529 goto out_err; 1530 if (!nfs4_init_copy_state(nn, copy)) 1531 goto out_err; 1532 refcount_set(&async_copy->refcount, 1); 1533 memcpy(©->cp_res.cb_stateid, ©->cp_stateid, 1534 sizeof(copy->cp_stateid)); 1535 status = dup_copy_fields(copy, async_copy); 1536 if (status) 1537 goto out_err; 1538 async_copy->copy_task = kthread_create(nfsd4_do_async_copy, 1539 async_copy, "%s", "copy thread"); 1540 if (IS_ERR(async_copy->copy_task)) 1541 goto out_err; 1542 spin_lock(&async_copy->cp_clp->async_lock); 1543 list_add(&async_copy->copies, 1544 &async_copy->cp_clp->async_copies); 1545 spin_unlock(&async_copy->cp_clp->async_lock); 1546 wake_up_process(async_copy->copy_task); 1547 status = nfs_ok; 1548 } else { 1549 status = nfsd4_do_copy(copy, 1); 1550 } 1551 out: 1552 return status; 1553 out_err: 1554 if (async_copy) 1555 cleanup_async_copy(async_copy); 1556 status = nfserrno(-ENOMEM); 1557 if (!copy->cp_intra) 1558 nfsd4_interssc_disconnect(copy->ss_mnt); 1559 goto out; 1560 } 1561 1562 struct nfsd4_copy * 1563 find_async_copy(struct nfs4_client *clp, stateid_t *stateid) 1564 { 1565 struct nfsd4_copy *copy; 1566 1567 spin_lock(&clp->async_lock); 1568 list_for_each_entry(copy, &clp->async_copies, copies) { 1569 if (memcmp(©->cp_stateid.stid, stateid, NFS4_STATEID_SIZE)) 1570 continue; 1571 refcount_inc(©->refcount); 1572 spin_unlock(&clp->async_lock); 1573 return copy; 1574 } 1575 spin_unlock(&clp->async_lock); 1576 return NULL; 1577 } 1578 1579 static __be32 1580 nfsd4_offload_cancel(struct svc_rqst *rqstp, 1581 struct nfsd4_compound_state *cstate, 1582 union nfsd4_op_u *u) 1583 { 1584 struct nfsd4_offload_status *os = &u->offload_status; 1585 struct nfsd4_copy *copy; 1586 struct nfs4_client *clp = cstate->clp; 1587 1588 copy = find_async_copy(clp, &os->stateid); 1589 if (!copy) { 1590 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1591 1592 return manage_cpntf_state(nn, &os->stateid, clp, NULL); 1593 } else 1594 nfsd4_stop_copy(copy); 1595 1596 return nfs_ok; 1597 } 1598 1599 static __be32 1600 nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1601 union nfsd4_op_u *u) 1602 { 1603 struct nfsd4_copy_notify *cn = &u->copy_notify; 1604 __be32 status; 1605 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1606 struct nfs4_stid *stid; 1607 struct nfs4_cpntf_state *cps; 1608 struct nfs4_client *clp = cstate->clp; 1609 1610 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1611 &cn->cpn_src_stateid, RD_STATE, NULL, 1612 &stid); 1613 if (status) 1614 return status; 1615 1616 cn->cpn_sec = nn->nfsd4_lease; 1617 cn->cpn_nsec = 0; 1618 1619 status = nfserrno(-ENOMEM); 1620 cps = nfs4_alloc_init_cpntf_state(nn, stid); 1621 if (!cps) 1622 goto out; 1623 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t)); 1624 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t)); 1625 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t)); 1626 1627 /* For now, only return one server address in cpn_src, the 1628 * address used by the client to connect to this server. 1629 */ 1630 cn->cpn_src.nl4_type = NL4_NETADDR; 1631 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr, 1632 &cn->cpn_src.u.nl4_addr); 1633 WARN_ON_ONCE(status); 1634 if (status) { 1635 nfs4_put_cpntf_state(nn, cps); 1636 goto out; 1637 } 1638 out: 1639 nfs4_put_stid(stid); 1640 return status; 1641 } 1642 1643 static __be32 1644 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1645 struct nfsd4_fallocate *fallocate, int flags) 1646 { 1647 __be32 status; 1648 struct nfsd_file *nf; 1649 1650 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1651 &fallocate->falloc_stateid, 1652 WR_STATE, &nf, NULL); 1653 if (status != nfs_ok) { 1654 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1655 return status; 1656 } 1657 1658 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file, 1659 fallocate->falloc_offset, 1660 fallocate->falloc_length, 1661 flags); 1662 nfsd_file_put(nf); 1663 return status; 1664 } 1665 static __be32 1666 nfsd4_offload_status(struct svc_rqst *rqstp, 1667 struct nfsd4_compound_state *cstate, 1668 union nfsd4_op_u *u) 1669 { 1670 struct nfsd4_offload_status *os = &u->offload_status; 1671 __be32 status = 0; 1672 struct nfsd4_copy *copy; 1673 struct nfs4_client *clp = cstate->clp; 1674 1675 copy = find_async_copy(clp, &os->stateid); 1676 if (copy) { 1677 os->count = copy->cp_res.wr_bytes_written; 1678 nfs4_put_copy(copy); 1679 } else 1680 status = nfserr_bad_stateid; 1681 1682 return status; 1683 } 1684 1685 static __be32 1686 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1687 union nfsd4_op_u *u) 1688 { 1689 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0); 1690 } 1691 1692 static __be32 1693 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1694 union nfsd4_op_u *u) 1695 { 1696 return nfsd4_fallocate(rqstp, cstate, &u->deallocate, 1697 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1698 } 1699 1700 static __be32 1701 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1702 union nfsd4_op_u *u) 1703 { 1704 struct nfsd4_seek *seek = &u->seek; 1705 int whence; 1706 __be32 status; 1707 struct nfsd_file *nf; 1708 1709 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1710 &seek->seek_stateid, 1711 RD_STATE, &nf, NULL); 1712 if (status) { 1713 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1714 return status; 1715 } 1716 1717 switch (seek->seek_whence) { 1718 case NFS4_CONTENT_DATA: 1719 whence = SEEK_DATA; 1720 break; 1721 case NFS4_CONTENT_HOLE: 1722 whence = SEEK_HOLE; 1723 break; 1724 default: 1725 status = nfserr_union_notsupp; 1726 goto out; 1727 } 1728 1729 /* 1730 * Note: This call does change file->f_pos, but nothing in NFSD 1731 * should ever file->f_pos. 1732 */ 1733 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence); 1734 if (seek->seek_pos < 0) 1735 status = nfserrno(seek->seek_pos); 1736 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file))) 1737 seek->seek_eof = true; 1738 1739 out: 1740 nfsd_file_put(nf); 1741 return status; 1742 } 1743 1744 /* This routine never returns NFS_OK! If there are no other errors, it 1745 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1746 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1747 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1748 */ 1749 static __be32 1750 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1751 struct nfsd4_verify *verify) 1752 { 1753 __be32 *buf, *p; 1754 int count; 1755 __be32 status; 1756 1757 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1758 if (status) 1759 return status; 1760 1761 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1762 if (status) 1763 return status; 1764 1765 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1766 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1767 return nfserr_inval; 1768 if (verify->ve_attrlen & 3) 1769 return nfserr_inval; 1770 1771 /* count in words: 1772 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1773 */ 1774 count = 4 + (verify->ve_attrlen >> 2); 1775 buf = kmalloc(count << 2, GFP_KERNEL); 1776 if (!buf) 1777 return nfserr_jukebox; 1778 1779 p = buf; 1780 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1781 cstate->current_fh.fh_export, 1782 cstate->current_fh.fh_dentry, 1783 verify->ve_bmval, 1784 rqstp, 0); 1785 /* 1786 * If nfsd4_encode_fattr() ran out of space, assume that's because 1787 * the attributes are longer (hence different) than those given: 1788 */ 1789 if (status == nfserr_resource) 1790 status = nfserr_not_same; 1791 if (status) 1792 goto out_kfree; 1793 1794 /* skip bitmap */ 1795 p = buf + 1 + ntohl(buf[0]); 1796 status = nfserr_not_same; 1797 if (ntohl(*p++) != verify->ve_attrlen) 1798 goto out_kfree; 1799 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1800 status = nfserr_same; 1801 1802 out_kfree: 1803 kfree(buf); 1804 return status; 1805 } 1806 1807 static __be32 1808 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1809 union nfsd4_op_u *u) 1810 { 1811 __be32 status; 1812 1813 status = _nfsd4_verify(rqstp, cstate, &u->verify); 1814 return status == nfserr_not_same ? nfs_ok : status; 1815 } 1816 1817 static __be32 1818 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1819 union nfsd4_op_u *u) 1820 { 1821 __be32 status; 1822 1823 status = _nfsd4_verify(rqstp, cstate, &u->nverify); 1824 return status == nfserr_same ? nfs_ok : status; 1825 } 1826 1827 #ifdef CONFIG_NFSD_PNFS 1828 static const struct nfsd4_layout_ops * 1829 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1830 { 1831 if (!exp->ex_layout_types) { 1832 dprintk("%s: export does not support pNFS\n", __func__); 1833 return NULL; 1834 } 1835 1836 if (layout_type >= LAYOUT_TYPE_MAX || 1837 !(exp->ex_layout_types & (1 << layout_type))) { 1838 dprintk("%s: layout type %d not supported\n", 1839 __func__, layout_type); 1840 return NULL; 1841 } 1842 1843 return nfsd4_layout_ops[layout_type]; 1844 } 1845 1846 static __be32 1847 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1848 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1849 { 1850 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo; 1851 const struct nfsd4_layout_ops *ops; 1852 struct nfsd4_deviceid_map *map; 1853 struct svc_export *exp; 1854 __be32 nfserr; 1855 1856 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1857 __func__, 1858 gdp->gd_layout_type, 1859 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1860 gdp->gd_maxcount); 1861 1862 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1863 if (!map) { 1864 dprintk("%s: couldn't find device ID to export mapping!\n", 1865 __func__); 1866 return nfserr_noent; 1867 } 1868 1869 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1870 if (IS_ERR(exp)) { 1871 dprintk("%s: could not find device id\n", __func__); 1872 return nfserr_noent; 1873 } 1874 1875 nfserr = nfserr_layoutunavailable; 1876 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1877 if (!ops) 1878 goto out; 1879 1880 nfserr = nfs_ok; 1881 if (gdp->gd_maxcount != 0) { 1882 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1883 rqstp, cstate->session->se_client, gdp); 1884 } 1885 1886 gdp->gd_notify_types &= ops->notify_types; 1887 out: 1888 exp_put(exp); 1889 return nfserr; 1890 } 1891 1892 static void 1893 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u) 1894 { 1895 kfree(u->getdeviceinfo.gd_device); 1896 } 1897 1898 static __be32 1899 nfsd4_layoutget(struct svc_rqst *rqstp, 1900 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1901 { 1902 struct nfsd4_layoutget *lgp = &u->layoutget; 1903 struct svc_fh *current_fh = &cstate->current_fh; 1904 const struct nfsd4_layout_ops *ops; 1905 struct nfs4_layout_stateid *ls; 1906 __be32 nfserr; 1907 int accmode = NFSD_MAY_READ_IF_EXEC; 1908 1909 switch (lgp->lg_seg.iomode) { 1910 case IOMODE_READ: 1911 accmode |= NFSD_MAY_READ; 1912 break; 1913 case IOMODE_RW: 1914 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE; 1915 break; 1916 default: 1917 dprintk("%s: invalid iomode %d\n", 1918 __func__, lgp->lg_seg.iomode); 1919 nfserr = nfserr_badiomode; 1920 goto out; 1921 } 1922 1923 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1924 if (nfserr) 1925 goto out; 1926 1927 nfserr = nfserr_layoutunavailable; 1928 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1929 if (!ops) 1930 goto out; 1931 1932 /* 1933 * Verify minlength and range as per RFC5661: 1934 * o If loga_length is less than loga_minlength, 1935 * the metadata server MUST return NFS4ERR_INVAL. 1936 * o If the sum of loga_offset and loga_minlength exceeds 1937 * NFS4_UINT64_MAX, and loga_minlength is not 1938 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1939 * o If the sum of loga_offset and loga_length exceeds 1940 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1941 * the error NFS4ERR_INVAL MUST result. 1942 */ 1943 nfserr = nfserr_inval; 1944 if (lgp->lg_seg.length < lgp->lg_minlength || 1945 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1946 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1947 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1948 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1949 goto out; 1950 if (lgp->lg_seg.length == 0) 1951 goto out; 1952 1953 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1954 true, lgp->lg_layout_type, &ls); 1955 if (nfserr) { 1956 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid); 1957 goto out; 1958 } 1959 1960 nfserr = nfserr_recallconflict; 1961 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1962 goto out_put_stid; 1963 1964 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1965 current_fh, lgp); 1966 if (nfserr) 1967 goto out_put_stid; 1968 1969 nfserr = nfsd4_insert_layout(lgp, ls); 1970 1971 out_put_stid: 1972 mutex_unlock(&ls->ls_mutex); 1973 nfs4_put_stid(&ls->ls_stid); 1974 out: 1975 return nfserr; 1976 } 1977 1978 static void 1979 nfsd4_layoutget_release(union nfsd4_op_u *u) 1980 { 1981 kfree(u->layoutget.lg_content); 1982 } 1983 1984 static __be32 1985 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1986 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1987 { 1988 struct nfsd4_layoutcommit *lcp = &u->layoutcommit; 1989 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1990 struct svc_fh *current_fh = &cstate->current_fh; 1991 const struct nfsd4_layout_ops *ops; 1992 loff_t new_size = lcp->lc_last_wr + 1; 1993 struct inode *inode; 1994 struct nfs4_layout_stateid *ls; 1995 __be32 nfserr; 1996 1997 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 1998 if (nfserr) 1999 goto out; 2000 2001 nfserr = nfserr_layoutunavailable; 2002 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 2003 if (!ops) 2004 goto out; 2005 inode = d_inode(current_fh->fh_dentry); 2006 2007 nfserr = nfserr_inval; 2008 if (new_size <= seg->offset) { 2009 dprintk("pnfsd: last write before layout segment\n"); 2010 goto out; 2011 } 2012 if (new_size > seg->offset + seg->length) { 2013 dprintk("pnfsd: last write beyond layout segment\n"); 2014 goto out; 2015 } 2016 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 2017 dprintk("pnfsd: layoutcommit beyond EOF\n"); 2018 goto out; 2019 } 2020 2021 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 2022 false, lcp->lc_layout_type, 2023 &ls); 2024 if (nfserr) { 2025 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid); 2026 /* fixup error code as per RFC5661 */ 2027 if (nfserr == nfserr_bad_stateid) 2028 nfserr = nfserr_badlayout; 2029 goto out; 2030 } 2031 2032 /* LAYOUTCOMMIT does not require any serialization */ 2033 mutex_unlock(&ls->ls_mutex); 2034 2035 if (new_size > i_size_read(inode)) { 2036 lcp->lc_size_chg = 1; 2037 lcp->lc_newsize = new_size; 2038 } else { 2039 lcp->lc_size_chg = 0; 2040 } 2041 2042 nfserr = ops->proc_layoutcommit(inode, lcp); 2043 nfs4_put_stid(&ls->ls_stid); 2044 out: 2045 return nfserr; 2046 } 2047 2048 static __be32 2049 nfsd4_layoutreturn(struct svc_rqst *rqstp, 2050 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 2051 { 2052 struct nfsd4_layoutreturn *lrp = &u->layoutreturn; 2053 struct svc_fh *current_fh = &cstate->current_fh; 2054 __be32 nfserr; 2055 2056 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 2057 if (nfserr) 2058 goto out; 2059 2060 nfserr = nfserr_layoutunavailable; 2061 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 2062 goto out; 2063 2064 switch (lrp->lr_seg.iomode) { 2065 case IOMODE_READ: 2066 case IOMODE_RW: 2067 case IOMODE_ANY: 2068 break; 2069 default: 2070 dprintk("%s: invalid iomode %d\n", __func__, 2071 lrp->lr_seg.iomode); 2072 nfserr = nfserr_inval; 2073 goto out; 2074 } 2075 2076 switch (lrp->lr_return_type) { 2077 case RETURN_FILE: 2078 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 2079 break; 2080 case RETURN_FSID: 2081 case RETURN_ALL: 2082 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 2083 break; 2084 default: 2085 dprintk("%s: invalid return_type %d\n", __func__, 2086 lrp->lr_return_type); 2087 nfserr = nfserr_inval; 2088 break; 2089 } 2090 out: 2091 return nfserr; 2092 } 2093 #endif /* CONFIG_NFSD_PNFS */ 2094 2095 /* 2096 * NULL call. 2097 */ 2098 static __be32 2099 nfsd4_proc_null(struct svc_rqst *rqstp) 2100 { 2101 return nfs_ok; 2102 } 2103 2104 static inline void nfsd4_increment_op_stats(u32 opnum) 2105 { 2106 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 2107 nfsdstats.nfs4_opcount[opnum]++; 2108 } 2109 2110 static const struct nfsd4_operation nfsd4_ops[]; 2111 2112 static const char *nfsd4_op_name(unsigned opnum); 2113 2114 /* 2115 * Enforce NFSv4.1 COMPOUND ordering rules: 2116 * 2117 * Also note, enforced elsewhere: 2118 * - SEQUENCE other than as first op results in 2119 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 2120 * - BIND_CONN_TO_SESSION must be the only op in its compound. 2121 * (Enforced in nfsd4_bind_conn_to_session().) 2122 * - DESTROY_SESSION must be the final operation in a compound, if 2123 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 2124 * (Enforced in nfsd4_destroy_session().) 2125 */ 2126 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 2127 { 2128 struct nfsd4_op *first_op = &args->ops[0]; 2129 2130 /* These ordering requirements don't apply to NFSv4.0: */ 2131 if (args->minorversion == 0) 2132 return nfs_ok; 2133 /* This is weird, but OK, not our problem: */ 2134 if (args->opcnt == 0) 2135 return nfs_ok; 2136 if (first_op->status == nfserr_op_illegal) 2137 return nfs_ok; 2138 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 2139 return nfserr_op_not_in_session; 2140 if (first_op->opnum == OP_SEQUENCE) 2141 return nfs_ok; 2142 /* 2143 * So first_op is something allowed outside a session, like 2144 * EXCHANGE_ID; but then it has to be the only op in the 2145 * compound: 2146 */ 2147 if (args->opcnt != 1) 2148 return nfserr_not_only_op; 2149 return nfs_ok; 2150 } 2151 2152 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 2153 { 2154 return &nfsd4_ops[op->opnum]; 2155 } 2156 2157 bool nfsd4_cache_this_op(struct nfsd4_op *op) 2158 { 2159 if (op->opnum == OP_ILLEGAL) 2160 return false; 2161 return OPDESC(op)->op_flags & OP_CACHEME; 2162 } 2163 2164 static bool need_wrongsec_check(struct svc_rqst *rqstp) 2165 { 2166 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2167 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2168 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2169 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 2170 const struct nfsd4_operation *thisd = OPDESC(this); 2171 const struct nfsd4_operation *nextd; 2172 2173 /* 2174 * Most ops check wronsec on our own; only the putfh-like ops 2175 * have special rules. 2176 */ 2177 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 2178 return false; 2179 /* 2180 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 2181 * put-filehandle operation if we're not going to use the 2182 * result: 2183 */ 2184 if (argp->opcnt == resp->opcnt) 2185 return false; 2186 if (next->opnum == OP_ILLEGAL) 2187 return false; 2188 nextd = OPDESC(next); 2189 /* 2190 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 2191 * errors themselves as necessary; others should check for them 2192 * now: 2193 */ 2194 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 2195 } 2196 2197 static void svcxdr_init_encode(struct svc_rqst *rqstp, 2198 struct nfsd4_compoundres *resp) 2199 { 2200 struct xdr_stream *xdr = &resp->xdr; 2201 struct xdr_buf *buf = &rqstp->rq_res; 2202 struct kvec *head = buf->head; 2203 2204 xdr->buf = buf; 2205 xdr->iov = head; 2206 xdr->p = head->iov_base + head->iov_len; 2207 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 2208 /* Tail and page_len should be zero at this point: */ 2209 buf->len = buf->head[0].iov_len; 2210 xdr->scratch.iov_len = 0; 2211 xdr->page_ptr = buf->pages - 1; 2212 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 2213 - rqstp->rq_auth_slack; 2214 } 2215 2216 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 2217 static void 2218 check_if_stalefh_allowed(struct nfsd4_compoundargs *args) 2219 { 2220 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL; 2221 struct nfsd4_copy *copy; 2222 struct nfsd4_putfh *putfh; 2223 int i; 2224 2225 /* traverse all operation and if it's a COPY compound, mark the 2226 * source filehandle to skip verification 2227 */ 2228 for (i = 0; i < args->opcnt; i++) { 2229 op = &args->ops[i]; 2230 if (op->opnum == OP_PUTFH) 2231 current_op = op; 2232 else if (op->opnum == OP_SAVEFH) 2233 saved_op = current_op; 2234 else if (op->opnum == OP_RESTOREFH) 2235 current_op = saved_op; 2236 else if (op->opnum == OP_COPY) { 2237 copy = (struct nfsd4_copy *)&op->u; 2238 if (!saved_op) { 2239 op->status = nfserr_nofilehandle; 2240 return; 2241 } 2242 putfh = (struct nfsd4_putfh *)&saved_op->u; 2243 if (!copy->cp_intra) 2244 putfh->no_verify = true; 2245 } 2246 } 2247 } 2248 #else 2249 static void 2250 check_if_stalefh_allowed(struct nfsd4_compoundargs *args) 2251 { 2252 } 2253 #endif 2254 2255 /* 2256 * COMPOUND call. 2257 */ 2258 static __be32 2259 nfsd4_proc_compound(struct svc_rqst *rqstp) 2260 { 2261 struct nfsd4_compoundargs *args = rqstp->rq_argp; 2262 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2263 struct nfsd4_op *op; 2264 struct nfsd4_compound_state *cstate = &resp->cstate; 2265 struct svc_fh *current_fh = &cstate->current_fh; 2266 struct svc_fh *save_fh = &cstate->save_fh; 2267 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2268 __be32 status; 2269 2270 svcxdr_init_encode(rqstp, resp); 2271 resp->tagp = resp->xdr.p; 2272 /* reserve space for: taglen, tag, and opcnt */ 2273 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 2274 resp->taglen = args->taglen; 2275 resp->tag = args->tag; 2276 resp->rqstp = rqstp; 2277 cstate->minorversion = args->minorversion; 2278 fh_init(current_fh, NFS4_FHSIZE); 2279 fh_init(save_fh, NFS4_FHSIZE); 2280 /* 2281 * Don't use the deferral mechanism for NFSv4; compounds make it 2282 * too hard to avoid non-idempotency problems. 2283 */ 2284 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2285 2286 /* 2287 * According to RFC3010, this takes precedence over all other errors. 2288 */ 2289 status = nfserr_minor_vers_mismatch; 2290 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0) 2291 goto out; 2292 status = nfserr_resource; 2293 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND) 2294 goto out; 2295 2296 status = nfs41_check_op_ordering(args); 2297 if (status) { 2298 op = &args->ops[0]; 2299 op->status = status; 2300 resp->opcnt = 1; 2301 goto encode_op; 2302 } 2303 check_if_stalefh_allowed(args); 2304 2305 trace_nfsd_compound(rqstp, args->opcnt); 2306 while (!status && resp->opcnt < args->opcnt) { 2307 op = &args->ops[resp->opcnt++]; 2308 2309 /* 2310 * The XDR decode routines may have pre-set op->status; 2311 * for example, if there is a miscellaneous XDR error 2312 * it will be set to nfserr_bad_xdr. 2313 */ 2314 if (op->status) { 2315 if (op->opnum == OP_OPEN) 2316 op->status = nfsd4_open_omfg(rqstp, cstate, op); 2317 goto encode_op; 2318 } 2319 if (!current_fh->fh_dentry && 2320 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) { 2321 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 2322 op->status = nfserr_nofilehandle; 2323 goto encode_op; 2324 } 2325 } else if (current_fh->fh_export && 2326 current_fh->fh_export->ex_fslocs.migrated && 2327 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 2328 op->status = nfserr_moved; 2329 goto encode_op; 2330 } 2331 2332 fh_clear_wcc(current_fh); 2333 2334 /* If op is non-idempotent */ 2335 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) { 2336 /* 2337 * Don't execute this op if we couldn't encode a 2338 * succesful reply: 2339 */ 2340 u32 plen = op->opdesc->op_rsize_bop(rqstp, op); 2341 /* 2342 * Plus if there's another operation, make sure 2343 * we'll have space to at least encode an error: 2344 */ 2345 if (resp->opcnt < args->opcnt) 2346 plen += COMPOUND_ERR_SLACK_SPACE; 2347 op->status = nfsd4_check_resp_size(resp, plen); 2348 } 2349 2350 if (op->status) 2351 goto encode_op; 2352 2353 if (op->opdesc->op_get_currentstateid) 2354 op->opdesc->op_get_currentstateid(cstate, &op->u); 2355 op->status = op->opdesc->op_func(rqstp, cstate, &op->u); 2356 2357 /* Only from SEQUENCE */ 2358 if (cstate->status == nfserr_replay_cache) { 2359 dprintk("%s NFS4.1 replay from cache\n", __func__); 2360 status = op->status; 2361 goto out; 2362 } 2363 if (!op->status) { 2364 if (op->opdesc->op_set_currentstateid) 2365 op->opdesc->op_set_currentstateid(cstate, &op->u); 2366 2367 if (op->opdesc->op_flags & OP_CLEAR_STATEID) 2368 clear_current_stateid(cstate); 2369 2370 if (current_fh->fh_export && 2371 need_wrongsec_check(rqstp)) 2372 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 2373 } 2374 encode_op: 2375 if (op->status == nfserr_replay_me) { 2376 op->replay = &cstate->replay_owner->so_replay; 2377 nfsd4_encode_replay(&resp->xdr, op); 2378 status = op->status = op->replay->rp_status; 2379 } else { 2380 nfsd4_encode_operation(resp, op); 2381 status = op->status; 2382 } 2383 2384 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status, 2385 nfsd4_op_name(op->opnum)); 2386 2387 nfsd4_cstate_clear_replay(cstate); 2388 nfsd4_increment_op_stats(op->opnum); 2389 } 2390 2391 cstate->status = status; 2392 fh_put(current_fh); 2393 fh_put(save_fh); 2394 BUG_ON(cstate->replay_owner); 2395 out: 2396 /* Reset deferral mechanism for RPC deferrals */ 2397 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2398 dprintk("nfsv4 compound returned %d\n", ntohl(status)); 2399 return status; 2400 } 2401 2402 #define op_encode_hdr_size (2) 2403 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 2404 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 2405 #define op_encode_change_info_maxsz (5) 2406 #define nfs4_fattr_bitmap_maxsz (4) 2407 2408 /* We'll fall back on returning no lockowner if run out of space: */ 2409 #define op_encode_lockowner_maxsz (0) 2410 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 2411 2412 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 2413 2414 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 2415 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 2416 op_encode_ace_maxsz) 2417 2418 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 2419 2420 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2421 { 2422 return (op_encode_hdr_size) * sizeof(__be32); 2423 } 2424 2425 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2426 { 2427 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 2428 } 2429 2430 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2431 { 2432 /* ac_supported, ac_resp_access */ 2433 return (op_encode_hdr_size + 2)* sizeof(__be32); 2434 } 2435 2436 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2437 { 2438 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 2439 } 2440 2441 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2442 { 2443 return (op_encode_hdr_size + op_encode_change_info_maxsz 2444 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2445 } 2446 2447 /* 2448 * Note since this is an idempotent operation we won't insist on failing 2449 * the op prematurely if the estimate is too large. We may turn off splice 2450 * reads unnecessarily. 2451 */ 2452 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 2453 struct nfsd4_op *op) 2454 { 2455 u32 *bmap = op->u.getattr.ga_bmval; 2456 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 2457 u32 ret = 0; 2458 2459 if (bmap0 & FATTR4_WORD0_ACL) 2460 return svc_max_payload(rqstp); 2461 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 2462 return svc_max_payload(rqstp); 2463 2464 if (bmap1 & FATTR4_WORD1_OWNER) { 2465 ret += IDMAP_NAMESZ + 4; 2466 bmap1 &= ~FATTR4_WORD1_OWNER; 2467 } 2468 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 2469 ret += IDMAP_NAMESZ + 4; 2470 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 2471 } 2472 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 2473 ret += NFS4_FHSIZE + 4; 2474 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 2475 } 2476 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 2477 ret += NFS4_MAXLABELLEN + 12; 2478 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2479 } 2480 /* 2481 * Largest of remaining attributes are 16 bytes (e.g., 2482 * supported_attributes) 2483 */ 2484 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 2485 /* bitmask, length */ 2486 ret += 20; 2487 return ret; 2488 } 2489 2490 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2491 { 2492 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE; 2493 } 2494 2495 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2496 { 2497 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2498 * sizeof(__be32); 2499 } 2500 2501 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2502 { 2503 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 2504 * sizeof(__be32); 2505 } 2506 2507 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2508 { 2509 return (op_encode_hdr_size + op_encode_stateid_maxsz 2510 + op_encode_change_info_maxsz + 1 2511 + nfs4_fattr_bitmap_maxsz 2512 + op_encode_delegation_maxsz) * sizeof(__be32); 2513 } 2514 2515 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2516 { 2517 u32 maxcount = 0, rlen = 0; 2518 2519 maxcount = svc_max_payload(rqstp); 2520 rlen = min(op->u.read.rd_length, maxcount); 2521 2522 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2523 } 2524 2525 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2526 { 2527 u32 maxcount = 0, rlen = 0; 2528 2529 maxcount = svc_max_payload(rqstp); 2530 rlen = min(op->u.readdir.rd_maxcount, maxcount); 2531 2532 return (op_encode_hdr_size + op_encode_verifier_maxsz + 2533 XDR_QUADLEN(rlen)) * sizeof(__be32); 2534 } 2535 2536 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2537 { 2538 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE; 2539 } 2540 2541 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2542 { 2543 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2544 * sizeof(__be32); 2545 } 2546 2547 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2548 { 2549 return (op_encode_hdr_size + op_encode_change_info_maxsz 2550 + op_encode_change_info_maxsz) * sizeof(__be32); 2551 } 2552 2553 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 2554 struct nfsd4_op *op) 2555 { 2556 return (op_encode_hdr_size 2557 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 2558 } 2559 2560 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2561 { 2562 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids) 2563 * sizeof(__be32); 2564 } 2565 2566 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2567 { 2568 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2569 } 2570 2571 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2572 { 2573 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR * 2574 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32); 2575 } 2576 2577 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2578 { 2579 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 2580 sizeof(__be32); 2581 } 2582 2583 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2584 { 2585 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 2586 } 2587 2588 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2589 { 2590 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 2591 1 + 1 + /* eir_flags, spr_how */\ 2592 4 + /* spo_must_enforce & _allow with bitmap */\ 2593 2 + /*eir_server_owner.so_minor_id */\ 2594 /* eir_server_owner.so_major_id<> */\ 2595 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2596 /* eir_server_scope<> */\ 2597 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2598 1 + /* eir_server_impl_id array length */\ 2599 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 2600 } 2601 2602 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2603 { 2604 return (op_encode_hdr_size + \ 2605 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 2606 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 2607 } 2608 2609 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2610 { 2611 return (op_encode_hdr_size + \ 2612 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 2613 2 + /* csr_sequence, csr_flags */\ 2614 op_encode_channel_attrs_maxsz + \ 2615 op_encode_channel_attrs_maxsz) * sizeof(__be32); 2616 } 2617 2618 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2619 { 2620 return (op_encode_hdr_size + 2621 1 /* wr_callback */ + 2622 op_encode_stateid_maxsz /* wr_callback */ + 2623 2 /* wr_count */ + 2624 1 /* wr_committed */ + 2625 op_encode_verifier_maxsz + 2626 1 /* cr_consecutive */ + 2627 1 /* cr_synchronous */) * sizeof(__be32); 2628 } 2629 2630 static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp, 2631 struct nfsd4_op *op) 2632 { 2633 return (op_encode_hdr_size + 2634 2 /* osr_count */ + 2635 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32); 2636 } 2637 2638 static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp, 2639 struct nfsd4_op *op) 2640 { 2641 return (op_encode_hdr_size + 2642 3 /* cnr_lease_time */ + 2643 1 /* We support one cnr_source_server */ + 2644 1 /* cnr_stateid seq */ + 2645 op_encode_stateid_maxsz /* cnr_stateid */ + 2646 1 /* num cnr_source_server*/ + 2647 1 /* nl4_type */ + 2648 1 /* nl4 size */ + 2649 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */) 2650 * sizeof(__be32); 2651 } 2652 2653 #ifdef CONFIG_NFSD_PNFS 2654 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2655 { 2656 u32 maxcount = 0, rlen = 0; 2657 2658 maxcount = svc_max_payload(rqstp); 2659 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount); 2660 2661 return (op_encode_hdr_size + 2662 1 /* gd_layout_type*/ + 2663 XDR_QUADLEN(rlen) + 2664 2 /* gd_notify_types */) * sizeof(__be32); 2665 } 2666 2667 /* 2668 * At this stage we don't really know what layout driver will handle the request, 2669 * so we need to define an arbitrary upper bound here. 2670 */ 2671 #define MAX_LAYOUT_SIZE 128 2672 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2673 { 2674 return (op_encode_hdr_size + 2675 1 /* logr_return_on_close */ + 2676 op_encode_stateid_maxsz + 2677 1 /* nr of layouts */ + 2678 MAX_LAYOUT_SIZE) * sizeof(__be32); 2679 } 2680 2681 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2682 { 2683 return (op_encode_hdr_size + 2684 1 /* locr_newsize */ + 2685 2 /* ns_size */) * sizeof(__be32); 2686 } 2687 2688 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2689 { 2690 return (op_encode_hdr_size + 2691 1 /* lrs_stateid */ + 2692 op_encode_stateid_maxsz) * sizeof(__be32); 2693 } 2694 #endif /* CONFIG_NFSD_PNFS */ 2695 2696 2697 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2698 { 2699 return (op_encode_hdr_size + 3) * sizeof(__be32); 2700 } 2701 2702 static const struct nfsd4_operation nfsd4_ops[] = { 2703 [OP_ACCESS] = { 2704 .op_func = nfsd4_access, 2705 .op_name = "OP_ACCESS", 2706 .op_rsize_bop = nfsd4_access_rsize, 2707 }, 2708 [OP_CLOSE] = { 2709 .op_func = nfsd4_close, 2710 .op_flags = OP_MODIFIES_SOMETHING, 2711 .op_name = "OP_CLOSE", 2712 .op_rsize_bop = nfsd4_status_stateid_rsize, 2713 .op_get_currentstateid = nfsd4_get_closestateid, 2714 .op_set_currentstateid = nfsd4_set_closestateid, 2715 }, 2716 [OP_COMMIT] = { 2717 .op_func = nfsd4_commit, 2718 .op_flags = OP_MODIFIES_SOMETHING, 2719 .op_name = "OP_COMMIT", 2720 .op_rsize_bop = nfsd4_commit_rsize, 2721 }, 2722 [OP_CREATE] = { 2723 .op_func = nfsd4_create, 2724 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2725 .op_name = "OP_CREATE", 2726 .op_rsize_bop = nfsd4_create_rsize, 2727 }, 2728 [OP_DELEGRETURN] = { 2729 .op_func = nfsd4_delegreturn, 2730 .op_flags = OP_MODIFIES_SOMETHING, 2731 .op_name = "OP_DELEGRETURN", 2732 .op_rsize_bop = nfsd4_only_status_rsize, 2733 .op_get_currentstateid = nfsd4_get_delegreturnstateid, 2734 }, 2735 [OP_GETATTR] = { 2736 .op_func = nfsd4_getattr, 2737 .op_flags = ALLOWED_ON_ABSENT_FS, 2738 .op_rsize_bop = nfsd4_getattr_rsize, 2739 .op_name = "OP_GETATTR", 2740 }, 2741 [OP_GETFH] = { 2742 .op_func = nfsd4_getfh, 2743 .op_name = "OP_GETFH", 2744 .op_rsize_bop = nfsd4_getfh_rsize, 2745 }, 2746 [OP_LINK] = { 2747 .op_func = nfsd4_link, 2748 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2749 | OP_CACHEME, 2750 .op_name = "OP_LINK", 2751 .op_rsize_bop = nfsd4_link_rsize, 2752 }, 2753 [OP_LOCK] = { 2754 .op_func = nfsd4_lock, 2755 .op_flags = OP_MODIFIES_SOMETHING | 2756 OP_NONTRIVIAL_ERROR_ENCODE, 2757 .op_name = "OP_LOCK", 2758 .op_rsize_bop = nfsd4_lock_rsize, 2759 .op_set_currentstateid = nfsd4_set_lockstateid, 2760 }, 2761 [OP_LOCKT] = { 2762 .op_func = nfsd4_lockt, 2763 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE, 2764 .op_name = "OP_LOCKT", 2765 .op_rsize_bop = nfsd4_lock_rsize, 2766 }, 2767 [OP_LOCKU] = { 2768 .op_func = nfsd4_locku, 2769 .op_flags = OP_MODIFIES_SOMETHING, 2770 .op_name = "OP_LOCKU", 2771 .op_rsize_bop = nfsd4_status_stateid_rsize, 2772 .op_get_currentstateid = nfsd4_get_lockustateid, 2773 }, 2774 [OP_LOOKUP] = { 2775 .op_func = nfsd4_lookup, 2776 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2777 .op_name = "OP_LOOKUP", 2778 .op_rsize_bop = nfsd4_only_status_rsize, 2779 }, 2780 [OP_LOOKUPP] = { 2781 .op_func = nfsd4_lookupp, 2782 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2783 .op_name = "OP_LOOKUPP", 2784 .op_rsize_bop = nfsd4_only_status_rsize, 2785 }, 2786 [OP_NVERIFY] = { 2787 .op_func = nfsd4_nverify, 2788 .op_name = "OP_NVERIFY", 2789 .op_rsize_bop = nfsd4_only_status_rsize, 2790 }, 2791 [OP_OPEN] = { 2792 .op_func = nfsd4_open, 2793 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2794 .op_name = "OP_OPEN", 2795 .op_rsize_bop = nfsd4_open_rsize, 2796 .op_set_currentstateid = nfsd4_set_openstateid, 2797 }, 2798 [OP_OPEN_CONFIRM] = { 2799 .op_func = nfsd4_open_confirm, 2800 .op_flags = OP_MODIFIES_SOMETHING, 2801 .op_name = "OP_OPEN_CONFIRM", 2802 .op_rsize_bop = nfsd4_status_stateid_rsize, 2803 }, 2804 [OP_OPEN_DOWNGRADE] = { 2805 .op_func = nfsd4_open_downgrade, 2806 .op_flags = OP_MODIFIES_SOMETHING, 2807 .op_name = "OP_OPEN_DOWNGRADE", 2808 .op_rsize_bop = nfsd4_status_stateid_rsize, 2809 .op_get_currentstateid = nfsd4_get_opendowngradestateid, 2810 .op_set_currentstateid = nfsd4_set_opendowngradestateid, 2811 }, 2812 [OP_PUTFH] = { 2813 .op_func = nfsd4_putfh, 2814 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2815 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2816 .op_name = "OP_PUTFH", 2817 .op_rsize_bop = nfsd4_only_status_rsize, 2818 }, 2819 [OP_PUTPUBFH] = { 2820 .op_func = nfsd4_putrootfh, 2821 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2822 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2823 .op_name = "OP_PUTPUBFH", 2824 .op_rsize_bop = nfsd4_only_status_rsize, 2825 }, 2826 [OP_PUTROOTFH] = { 2827 .op_func = nfsd4_putrootfh, 2828 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2829 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2830 .op_name = "OP_PUTROOTFH", 2831 .op_rsize_bop = nfsd4_only_status_rsize, 2832 }, 2833 [OP_READ] = { 2834 .op_func = nfsd4_read, 2835 .op_release = nfsd4_read_release, 2836 .op_name = "OP_READ", 2837 .op_rsize_bop = nfsd4_read_rsize, 2838 .op_get_currentstateid = nfsd4_get_readstateid, 2839 }, 2840 [OP_READDIR] = { 2841 .op_func = nfsd4_readdir, 2842 .op_name = "OP_READDIR", 2843 .op_rsize_bop = nfsd4_readdir_rsize, 2844 }, 2845 [OP_READLINK] = { 2846 .op_func = nfsd4_readlink, 2847 .op_name = "OP_READLINK", 2848 .op_rsize_bop = nfsd4_readlink_rsize, 2849 }, 2850 [OP_REMOVE] = { 2851 .op_func = nfsd4_remove, 2852 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2853 .op_name = "OP_REMOVE", 2854 .op_rsize_bop = nfsd4_remove_rsize, 2855 }, 2856 [OP_RENAME] = { 2857 .op_func = nfsd4_rename, 2858 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2859 .op_name = "OP_RENAME", 2860 .op_rsize_bop = nfsd4_rename_rsize, 2861 }, 2862 [OP_RENEW] = { 2863 .op_func = nfsd4_renew, 2864 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2865 | OP_MODIFIES_SOMETHING, 2866 .op_name = "OP_RENEW", 2867 .op_rsize_bop = nfsd4_only_status_rsize, 2868 2869 }, 2870 [OP_RESTOREFH] = { 2871 .op_func = nfsd4_restorefh, 2872 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2873 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2874 .op_name = "OP_RESTOREFH", 2875 .op_rsize_bop = nfsd4_only_status_rsize, 2876 }, 2877 [OP_SAVEFH] = { 2878 .op_func = nfsd4_savefh, 2879 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2880 .op_name = "OP_SAVEFH", 2881 .op_rsize_bop = nfsd4_only_status_rsize, 2882 }, 2883 [OP_SECINFO] = { 2884 .op_func = nfsd4_secinfo, 2885 .op_release = nfsd4_secinfo_release, 2886 .op_flags = OP_HANDLES_WRONGSEC, 2887 .op_name = "OP_SECINFO", 2888 .op_rsize_bop = nfsd4_secinfo_rsize, 2889 }, 2890 [OP_SETATTR] = { 2891 .op_func = nfsd4_setattr, 2892 .op_name = "OP_SETATTR", 2893 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME 2894 | OP_NONTRIVIAL_ERROR_ENCODE, 2895 .op_rsize_bop = nfsd4_setattr_rsize, 2896 .op_get_currentstateid = nfsd4_get_setattrstateid, 2897 }, 2898 [OP_SETCLIENTID] = { 2899 .op_func = nfsd4_setclientid, 2900 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2901 | OP_MODIFIES_SOMETHING | OP_CACHEME 2902 | OP_NONTRIVIAL_ERROR_ENCODE, 2903 .op_name = "OP_SETCLIENTID", 2904 .op_rsize_bop = nfsd4_setclientid_rsize, 2905 }, 2906 [OP_SETCLIENTID_CONFIRM] = { 2907 .op_func = nfsd4_setclientid_confirm, 2908 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2909 | OP_MODIFIES_SOMETHING | OP_CACHEME, 2910 .op_name = "OP_SETCLIENTID_CONFIRM", 2911 .op_rsize_bop = nfsd4_only_status_rsize, 2912 }, 2913 [OP_VERIFY] = { 2914 .op_func = nfsd4_verify, 2915 .op_name = "OP_VERIFY", 2916 .op_rsize_bop = nfsd4_only_status_rsize, 2917 }, 2918 [OP_WRITE] = { 2919 .op_func = nfsd4_write, 2920 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2921 .op_name = "OP_WRITE", 2922 .op_rsize_bop = nfsd4_write_rsize, 2923 .op_get_currentstateid = nfsd4_get_writestateid, 2924 }, 2925 [OP_RELEASE_LOCKOWNER] = { 2926 .op_func = nfsd4_release_lockowner, 2927 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2928 | OP_MODIFIES_SOMETHING, 2929 .op_name = "OP_RELEASE_LOCKOWNER", 2930 .op_rsize_bop = nfsd4_only_status_rsize, 2931 }, 2932 2933 /* NFSv4.1 operations */ 2934 [OP_EXCHANGE_ID] = { 2935 .op_func = nfsd4_exchange_id, 2936 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2937 | OP_MODIFIES_SOMETHING, 2938 .op_name = "OP_EXCHANGE_ID", 2939 .op_rsize_bop = nfsd4_exchange_id_rsize, 2940 }, 2941 [OP_BACKCHANNEL_CTL] = { 2942 .op_func = nfsd4_backchannel_ctl, 2943 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2944 .op_name = "OP_BACKCHANNEL_CTL", 2945 .op_rsize_bop = nfsd4_only_status_rsize, 2946 }, 2947 [OP_BIND_CONN_TO_SESSION] = { 2948 .op_func = nfsd4_bind_conn_to_session, 2949 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2950 | OP_MODIFIES_SOMETHING, 2951 .op_name = "OP_BIND_CONN_TO_SESSION", 2952 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize, 2953 }, 2954 [OP_CREATE_SESSION] = { 2955 .op_func = nfsd4_create_session, 2956 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2957 | OP_MODIFIES_SOMETHING, 2958 .op_name = "OP_CREATE_SESSION", 2959 .op_rsize_bop = nfsd4_create_session_rsize, 2960 }, 2961 [OP_DESTROY_SESSION] = { 2962 .op_func = nfsd4_destroy_session, 2963 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2964 | OP_MODIFIES_SOMETHING, 2965 .op_name = "OP_DESTROY_SESSION", 2966 .op_rsize_bop = nfsd4_only_status_rsize, 2967 }, 2968 [OP_SEQUENCE] = { 2969 .op_func = nfsd4_sequence, 2970 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 2971 .op_name = "OP_SEQUENCE", 2972 .op_rsize_bop = nfsd4_sequence_rsize, 2973 }, 2974 [OP_DESTROY_CLIENTID] = { 2975 .op_func = nfsd4_destroy_clientid, 2976 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 2977 | OP_MODIFIES_SOMETHING, 2978 .op_name = "OP_DESTROY_CLIENTID", 2979 .op_rsize_bop = nfsd4_only_status_rsize, 2980 }, 2981 [OP_RECLAIM_COMPLETE] = { 2982 .op_func = nfsd4_reclaim_complete, 2983 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 2984 .op_name = "OP_RECLAIM_COMPLETE", 2985 .op_rsize_bop = nfsd4_only_status_rsize, 2986 }, 2987 [OP_SECINFO_NO_NAME] = { 2988 .op_func = nfsd4_secinfo_no_name, 2989 .op_release = nfsd4_secinfo_no_name_release, 2990 .op_flags = OP_HANDLES_WRONGSEC, 2991 .op_name = "OP_SECINFO_NO_NAME", 2992 .op_rsize_bop = nfsd4_secinfo_rsize, 2993 }, 2994 [OP_TEST_STATEID] = { 2995 .op_func = nfsd4_test_stateid, 2996 .op_flags = ALLOWED_WITHOUT_FH, 2997 .op_name = "OP_TEST_STATEID", 2998 .op_rsize_bop = nfsd4_test_stateid_rsize, 2999 }, 3000 [OP_FREE_STATEID] = { 3001 .op_func = nfsd4_free_stateid, 3002 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3003 .op_name = "OP_FREE_STATEID", 3004 .op_get_currentstateid = nfsd4_get_freestateid, 3005 .op_rsize_bop = nfsd4_only_status_rsize, 3006 }, 3007 #ifdef CONFIG_NFSD_PNFS 3008 [OP_GETDEVICEINFO] = { 3009 .op_func = nfsd4_getdeviceinfo, 3010 .op_release = nfsd4_getdeviceinfo_release, 3011 .op_flags = ALLOWED_WITHOUT_FH, 3012 .op_name = "OP_GETDEVICEINFO", 3013 .op_rsize_bop = nfsd4_getdeviceinfo_rsize, 3014 }, 3015 [OP_LAYOUTGET] = { 3016 .op_func = nfsd4_layoutget, 3017 .op_release = nfsd4_layoutget_release, 3018 .op_flags = OP_MODIFIES_SOMETHING, 3019 .op_name = "OP_LAYOUTGET", 3020 .op_rsize_bop = nfsd4_layoutget_rsize, 3021 }, 3022 [OP_LAYOUTCOMMIT] = { 3023 .op_func = nfsd4_layoutcommit, 3024 .op_flags = OP_MODIFIES_SOMETHING, 3025 .op_name = "OP_LAYOUTCOMMIT", 3026 .op_rsize_bop = nfsd4_layoutcommit_rsize, 3027 }, 3028 [OP_LAYOUTRETURN] = { 3029 .op_func = nfsd4_layoutreturn, 3030 .op_flags = OP_MODIFIES_SOMETHING, 3031 .op_name = "OP_LAYOUTRETURN", 3032 .op_rsize_bop = nfsd4_layoutreturn_rsize, 3033 }, 3034 #endif /* CONFIG_NFSD_PNFS */ 3035 3036 /* NFSv4.2 operations */ 3037 [OP_ALLOCATE] = { 3038 .op_func = nfsd4_allocate, 3039 .op_flags = OP_MODIFIES_SOMETHING, 3040 .op_name = "OP_ALLOCATE", 3041 .op_rsize_bop = nfsd4_only_status_rsize, 3042 }, 3043 [OP_DEALLOCATE] = { 3044 .op_func = nfsd4_deallocate, 3045 .op_flags = OP_MODIFIES_SOMETHING, 3046 .op_name = "OP_DEALLOCATE", 3047 .op_rsize_bop = nfsd4_only_status_rsize, 3048 }, 3049 [OP_CLONE] = { 3050 .op_func = nfsd4_clone, 3051 .op_flags = OP_MODIFIES_SOMETHING, 3052 .op_name = "OP_CLONE", 3053 .op_rsize_bop = nfsd4_only_status_rsize, 3054 }, 3055 [OP_COPY] = { 3056 .op_func = nfsd4_copy, 3057 .op_flags = OP_MODIFIES_SOMETHING, 3058 .op_name = "OP_COPY", 3059 .op_rsize_bop = nfsd4_copy_rsize, 3060 }, 3061 [OP_SEEK] = { 3062 .op_func = nfsd4_seek, 3063 .op_name = "OP_SEEK", 3064 .op_rsize_bop = nfsd4_seek_rsize, 3065 }, 3066 [OP_OFFLOAD_STATUS] = { 3067 .op_func = nfsd4_offload_status, 3068 .op_name = "OP_OFFLOAD_STATUS", 3069 .op_rsize_bop = nfsd4_offload_status_rsize, 3070 }, 3071 [OP_OFFLOAD_CANCEL] = { 3072 .op_func = nfsd4_offload_cancel, 3073 .op_flags = OP_MODIFIES_SOMETHING, 3074 .op_name = "OP_OFFLOAD_CANCEL", 3075 .op_rsize_bop = nfsd4_only_status_rsize, 3076 }, 3077 [OP_COPY_NOTIFY] = { 3078 .op_func = nfsd4_copy_notify, 3079 .op_flags = OP_MODIFIES_SOMETHING, 3080 .op_name = "OP_COPY_NOTIFY", 3081 .op_rsize_bop = nfsd4_copy_notify_rsize, 3082 }, 3083 }; 3084 3085 /** 3086 * nfsd4_spo_must_allow - Determine if the compound op contains an 3087 * operation that is allowed to be sent with machine credentials 3088 * 3089 * @rqstp: a pointer to the struct svc_rqst 3090 * 3091 * Checks to see if the compound contains a spo_must_allow op 3092 * and confirms that it was sent with the proper machine creds. 3093 */ 3094 3095 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 3096 { 3097 struct nfsd4_compoundres *resp = rqstp->rq_resp; 3098 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 3099 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 3100 struct nfsd4_compound_state *cstate = &resp->cstate; 3101 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 3102 u32 opiter; 3103 3104 if (!cstate->minorversion) 3105 return false; 3106 3107 if (cstate->spo_must_allowed == true) 3108 return true; 3109 3110 opiter = resp->opcnt; 3111 while (opiter < argp->opcnt) { 3112 this = &argp->ops[opiter++]; 3113 if (test_bit(this->opnum, allow->u.longs) && 3114 cstate->clp->cl_mach_cred && 3115 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 3116 cstate->spo_must_allowed = true; 3117 return true; 3118 } 3119 } 3120 cstate->spo_must_allowed = false; 3121 return false; 3122 } 3123 3124 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 3125 { 3126 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp) 3127 return op_encode_hdr_size * sizeof(__be32); 3128 3129 BUG_ON(OPDESC(op)->op_rsize_bop == NULL); 3130 return OPDESC(op)->op_rsize_bop(rqstp, op); 3131 } 3132 3133 void warn_on_nonidempotent_op(struct nfsd4_op *op) 3134 { 3135 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 3136 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 3137 op->opnum, nfsd4_op_name(op->opnum)); 3138 WARN_ON_ONCE(1); 3139 } 3140 } 3141 3142 static const char *nfsd4_op_name(unsigned opnum) 3143 { 3144 if (opnum < ARRAY_SIZE(nfsd4_ops)) 3145 return nfsd4_ops[opnum].op_name; 3146 return "unknown_operation"; 3147 } 3148 3149 #define nfsd4_voidres nfsd4_voidargs 3150 struct nfsd4_voidargs { int dummy; }; 3151 3152 static const struct svc_procedure nfsd_procedures4[2] = { 3153 [NFSPROC4_NULL] = { 3154 .pc_func = nfsd4_proc_null, 3155 .pc_encode = nfs4svc_encode_voidres, 3156 .pc_argsize = sizeof(struct nfsd4_voidargs), 3157 .pc_ressize = sizeof(struct nfsd4_voidres), 3158 .pc_cachetype = RC_NOCACHE, 3159 .pc_xdrressize = 1, 3160 }, 3161 [NFSPROC4_COMPOUND] = { 3162 .pc_func = nfsd4_proc_compound, 3163 .pc_decode = nfs4svc_decode_compoundargs, 3164 .pc_encode = nfs4svc_encode_compoundres, 3165 .pc_argsize = sizeof(struct nfsd4_compoundargs), 3166 .pc_ressize = sizeof(struct nfsd4_compoundres), 3167 .pc_release = nfsd4_release_compoundargs, 3168 .pc_cachetype = RC_NOCACHE, 3169 .pc_xdrressize = NFSD_BUFSIZE/4, 3170 }, 3171 }; 3172 3173 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)]; 3174 const struct svc_version nfsd_version4 = { 3175 .vs_vers = 4, 3176 .vs_nproc = 2, 3177 .vs_proc = nfsd_procedures4, 3178 .vs_count = nfsd_count3, 3179 .vs_dispatch = nfsd_dispatch, 3180 .vs_xdrsize = NFS4_SVC_XDRSIZE, 3181 .vs_rpcb_optnl = true, 3182 .vs_need_cong_ctrl = true, 3183 }; 3184 3185 /* 3186 * Local variables: 3187 * c-basic-offset: 8 3188 * End: 3189 */ 3190