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 #include <linux/nfs_ssc.h> 42 43 #include "idmap.h" 44 #include "cache.h" 45 #include "xdr4.h" 46 #include "vfs.h" 47 #include "current_stateid.h" 48 #include "netns.h" 49 #include "acl.h" 50 #include "pnfs.h" 51 #include "trace.h" 52 53 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL 54 #include <linux/security.h> 55 56 static inline void 57 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 58 { 59 struct inode *inode = d_inode(resfh->fh_dentry); 60 int status; 61 62 inode_lock(inode); 63 status = security_inode_setsecctx(resfh->fh_dentry, 64 label->data, label->len); 65 inode_unlock(inode); 66 67 if (status) 68 /* 69 * XXX: We should really fail the whole open, but we may 70 * already have created a new file, so it may be too 71 * late. For now this seems the least of evils: 72 */ 73 bmval[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 74 75 return; 76 } 77 #else 78 static inline void 79 nfsd4_security_inode_setsecctx(struct svc_fh *resfh, struct xdr_netobj *label, u32 *bmval) 80 { } 81 #endif 82 83 #define NFSDDBG_FACILITY NFSDDBG_PROC 84 85 static u32 nfsd_attrmask[] = { 86 NFSD_WRITEABLE_ATTRS_WORD0, 87 NFSD_WRITEABLE_ATTRS_WORD1, 88 NFSD_WRITEABLE_ATTRS_WORD2 89 }; 90 91 static u32 nfsd41_ex_attrmask[] = { 92 NFSD_SUPPATTR_EXCLCREAT_WORD0, 93 NFSD_SUPPATTR_EXCLCREAT_WORD1, 94 NFSD_SUPPATTR_EXCLCREAT_WORD2 95 }; 96 97 static __be32 98 check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 99 u32 *bmval, u32 *writable) 100 { 101 struct dentry *dentry = cstate->current_fh.fh_dentry; 102 struct svc_export *exp = cstate->current_fh.fh_export; 103 104 if (!nfsd_attrs_supported(cstate->minorversion, bmval)) 105 return nfserr_attrnotsupp; 106 if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry))) 107 return nfserr_attrnotsupp; 108 if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) && 109 !(exp->ex_flags & NFSEXP_SECURITY_LABEL)) 110 return nfserr_attrnotsupp; 111 if (writable && !bmval_is_subset(bmval, writable)) 112 return nfserr_inval; 113 if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) && 114 (bmval[1] & FATTR4_WORD1_MODE)) 115 return nfserr_inval; 116 return nfs_ok; 117 } 118 119 static __be32 120 nfsd4_check_open_attributes(struct svc_rqst *rqstp, 121 struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 122 { 123 __be32 status = nfs_ok; 124 125 if (open->op_create == NFS4_OPEN_CREATE) { 126 if (open->op_createmode == NFS4_CREATE_UNCHECKED 127 || open->op_createmode == NFS4_CREATE_GUARDED) 128 status = check_attr_support(rqstp, cstate, 129 open->op_bmval, nfsd_attrmask); 130 else if (open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1) 131 status = check_attr_support(rqstp, cstate, 132 open->op_bmval, nfsd41_ex_attrmask); 133 } 134 135 return status; 136 } 137 138 static int 139 is_create_with_attrs(struct nfsd4_open *open) 140 { 141 return open->op_create == NFS4_OPEN_CREATE 142 && (open->op_createmode == NFS4_CREATE_UNCHECKED 143 || open->op_createmode == NFS4_CREATE_GUARDED 144 || open->op_createmode == NFS4_CREATE_EXCLUSIVE4_1); 145 } 146 147 /* 148 * if error occurs when setting the acl, just clear the acl bit 149 * in the returned attr bitmap. 150 */ 151 static void 152 do_set_nfs4_acl(struct svc_rqst *rqstp, struct svc_fh *fhp, 153 struct nfs4_acl *acl, u32 *bmval) 154 { 155 __be32 status; 156 157 status = nfsd4_set_nfs4_acl(rqstp, fhp, acl); 158 if (status) 159 /* 160 * We should probably fail the whole open at this point, 161 * but we've already created the file, so it's too late; 162 * So this seems the least of evils: 163 */ 164 bmval[0] &= ~FATTR4_WORD0_ACL; 165 } 166 167 static inline void 168 fh_dup2(struct svc_fh *dst, struct svc_fh *src) 169 { 170 fh_put(dst); 171 dget(src->fh_dentry); 172 if (src->fh_export) 173 exp_get(src->fh_export); 174 *dst = *src; 175 } 176 177 static __be32 178 do_open_permission(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open, int accmode) 179 { 180 __be32 status; 181 182 if (open->op_truncate && 183 !(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 184 return nfserr_inval; 185 186 accmode |= NFSD_MAY_READ_IF_EXEC; 187 188 if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 189 accmode |= NFSD_MAY_READ; 190 if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 191 accmode |= (NFSD_MAY_WRITE | NFSD_MAY_TRUNC); 192 if (open->op_share_deny & NFS4_SHARE_DENY_READ) 193 accmode |= NFSD_MAY_WRITE; 194 195 status = fh_verify(rqstp, current_fh, S_IFREG, accmode); 196 197 return status; 198 } 199 200 static __be32 nfsd_check_obj_isreg(struct svc_fh *fh) 201 { 202 umode_t mode = d_inode(fh->fh_dentry)->i_mode; 203 204 if (S_ISREG(mode)) 205 return nfs_ok; 206 if (S_ISDIR(mode)) 207 return nfserr_isdir; 208 /* 209 * Using err_symlink as our catch-all case may look odd; but 210 * there's no other obvious error for this case in 4.0, and we 211 * happen to know that it will cause the linux v4 client to do 212 * the right thing on attempts to open something other than a 213 * regular file. 214 */ 215 return nfserr_symlink; 216 } 217 218 static void nfsd4_set_open_owner_reply_cache(struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh *resfh) 219 { 220 if (nfsd4_has_session(cstate)) 221 return; 222 fh_copy_shallow(&open->op_openowner->oo_owner.so_replay.rp_openfh, 223 &resfh->fh_handle); 224 } 225 226 static __be32 227 do_open_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open, struct svc_fh **resfh) 228 { 229 struct svc_fh *current_fh = &cstate->current_fh; 230 int accmode; 231 __be32 status; 232 233 *resfh = kmalloc(sizeof(struct svc_fh), GFP_KERNEL); 234 if (!*resfh) 235 return nfserr_jukebox; 236 fh_init(*resfh, NFS4_FHSIZE); 237 open->op_truncate = false; 238 239 if (open->op_create) { 240 /* FIXME: check session persistence and pnfs flags. 241 * The nfsv4.1 spec requires the following semantics: 242 * 243 * Persistent | pNFS | Server REQUIRED | Client Allowed 244 * Reply Cache | server | | 245 * -------------+--------+-----------------+-------------------- 246 * no | no | EXCLUSIVE4_1 | EXCLUSIVE4_1 247 * | | | (SHOULD) 248 * | | and EXCLUSIVE4 | or EXCLUSIVE4 249 * | | | (SHOULD NOT) 250 * no | yes | EXCLUSIVE4_1 | EXCLUSIVE4_1 251 * yes | no | GUARDED4 | GUARDED4 252 * yes | yes | GUARDED4 | GUARDED4 253 */ 254 255 /* 256 * Note: create modes (UNCHECKED,GUARDED...) are the same 257 * in NFSv4 as in v3 except EXCLUSIVE4_1. 258 */ 259 current->fs->umask = open->op_umask; 260 status = do_nfsd_create(rqstp, current_fh, open->op_fname, 261 open->op_fnamelen, &open->op_iattr, 262 *resfh, open->op_createmode, 263 (u32 *)open->op_verf.data, 264 &open->op_truncate, &open->op_created); 265 current->fs->umask = 0; 266 267 if (!status && open->op_label.len) 268 nfsd4_security_inode_setsecctx(*resfh, &open->op_label, open->op_bmval); 269 270 /* 271 * Following rfc 3530 14.2.16, and rfc 5661 18.16.4 272 * use the returned bitmask to indicate which attributes 273 * we used to store the verifier: 274 */ 275 if (nfsd_create_is_exclusive(open->op_createmode) && status == 0) 276 open->op_bmval[1] |= (FATTR4_WORD1_TIME_ACCESS | 277 FATTR4_WORD1_TIME_MODIFY); 278 } else 279 /* 280 * Note this may exit with the parent still locked. 281 * We will hold the lock until nfsd4_open's final 282 * lookup, to prevent renames or unlinks until we've had 283 * a chance to an acquire a delegation if appropriate. 284 */ 285 status = nfsd_lookup(rqstp, current_fh, 286 open->op_fname, open->op_fnamelen, *resfh); 287 if (status) 288 goto out; 289 status = nfsd_check_obj_isreg(*resfh); 290 if (status) 291 goto out; 292 293 if (is_create_with_attrs(open) && open->op_acl != NULL) 294 do_set_nfs4_acl(rqstp, *resfh, open->op_acl, open->op_bmval); 295 296 nfsd4_set_open_owner_reply_cache(cstate, open, *resfh); 297 accmode = NFSD_MAY_NOP; 298 if (open->op_created || 299 open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 300 accmode |= NFSD_MAY_OWNER_OVERRIDE; 301 status = do_open_permission(rqstp, *resfh, open, accmode); 302 set_change_info(&open->op_cinfo, current_fh); 303 out: 304 return status; 305 } 306 307 static __be32 308 do_open_fhandle(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 309 { 310 struct svc_fh *current_fh = &cstate->current_fh; 311 __be32 status; 312 int accmode = 0; 313 314 /* We don't know the target directory, and therefore can not 315 * set the change info 316 */ 317 318 memset(&open->op_cinfo, 0, sizeof(struct nfsd4_change_info)); 319 320 nfsd4_set_open_owner_reply_cache(cstate, open, current_fh); 321 322 open->op_truncate = (open->op_iattr.ia_valid & ATTR_SIZE) && 323 (open->op_iattr.ia_size == 0); 324 /* 325 * In the delegation case, the client is telling us about an 326 * open that it *already* performed locally, some time ago. We 327 * should let it succeed now if possible. 328 * 329 * In the case of a CLAIM_FH open, on the other hand, the client 330 * may be counting on us to enforce permissions (the Linux 4.1 331 * client uses this for normal opens, for example). 332 */ 333 if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH) 334 accmode = NFSD_MAY_OWNER_OVERRIDE; 335 336 status = do_open_permission(rqstp, current_fh, open, accmode); 337 338 return status; 339 } 340 341 static void 342 copy_clientid(clientid_t *clid, struct nfsd4_session *session) 343 { 344 struct nfsd4_sessionid *sid = 345 (struct nfsd4_sessionid *)session->se_sessionid.data; 346 347 clid->cl_boot = sid->clientid.cl_boot; 348 clid->cl_id = sid->clientid.cl_id; 349 } 350 351 static __be32 352 nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 353 union nfsd4_op_u *u) 354 { 355 struct nfsd4_open *open = &u->open; 356 __be32 status; 357 struct svc_fh *resfh = NULL; 358 struct net *net = SVC_NET(rqstp); 359 struct nfsd_net *nn = net_generic(net, nfsd_net_id); 360 bool reclaim = false; 361 362 dprintk("NFSD: nfsd4_open filename %.*s op_openowner %p\n", 363 (int)open->op_fnamelen, open->op_fname, 364 open->op_openowner); 365 366 /* This check required by spec. */ 367 if (open->op_create && open->op_claim_type != NFS4_OPEN_CLAIM_NULL) 368 return nfserr_inval; 369 370 open->op_created = false; 371 /* 372 * RFC5661 18.51.3 373 * Before RECLAIM_COMPLETE done, server should deny new lock 374 */ 375 if (nfsd4_has_session(cstate) && 376 !test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 377 &cstate->session->se_client->cl_flags) && 378 open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 379 return nfserr_grace; 380 381 if (nfsd4_has_session(cstate)) 382 copy_clientid(&open->op_clientid, cstate->session); 383 384 /* check seqid for replay. set nfs4_owner */ 385 status = nfsd4_process_open1(cstate, open, nn); 386 if (status == nfserr_replay_me) { 387 struct nfs4_replay *rp = &open->op_openowner->oo_owner.so_replay; 388 fh_put(&cstate->current_fh); 389 fh_copy_shallow(&cstate->current_fh.fh_handle, 390 &rp->rp_openfh); 391 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 392 if (status) 393 dprintk("nfsd4_open: replay failed" 394 " restoring previous filehandle\n"); 395 else 396 status = nfserr_replay_me; 397 } 398 if (status) 399 goto out; 400 if (open->op_xdr_error) { 401 status = open->op_xdr_error; 402 goto out; 403 } 404 405 status = nfsd4_check_open_attributes(rqstp, cstate, open); 406 if (status) 407 goto out; 408 409 /* Openowner is now set, so sequence id will get bumped. Now we need 410 * these checks before we do any creates: */ 411 status = nfserr_grace; 412 if (opens_in_grace(net) && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 413 goto out; 414 status = nfserr_no_grace; 415 if (!opens_in_grace(net) && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 416 goto out; 417 418 switch (open->op_claim_type) { 419 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 420 case NFS4_OPEN_CLAIM_NULL: 421 status = do_open_lookup(rqstp, cstate, open, &resfh); 422 if (status) 423 goto out; 424 break; 425 case NFS4_OPEN_CLAIM_PREVIOUS: 426 status = nfs4_check_open_reclaim(&open->op_clientid, 427 cstate, nn); 428 if (status) 429 goto out; 430 open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 431 reclaim = true; 432 fallthrough; 433 case NFS4_OPEN_CLAIM_FH: 434 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 435 status = do_open_fhandle(rqstp, cstate, open); 436 if (status) 437 goto out; 438 resfh = &cstate->current_fh; 439 break; 440 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 441 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 442 dprintk("NFSD: unsupported OPEN claim type %d\n", 443 open->op_claim_type); 444 status = nfserr_notsupp; 445 goto out; 446 default: 447 dprintk("NFSD: Invalid OPEN claim type %d\n", 448 open->op_claim_type); 449 status = nfserr_inval; 450 goto out; 451 } 452 /* 453 * nfsd4_process_open2() does the actual opening of the file. If 454 * successful, it (1) truncates the file if open->op_truncate was 455 * set, (2) sets open->op_stateid, (3) sets open->op_delegation. 456 */ 457 status = nfsd4_process_open2(rqstp, resfh, open); 458 WARN(status && open->op_created, 459 "nfsd4_process_open2 failed to open newly-created file! status=%u\n", 460 be32_to_cpu(status)); 461 if (reclaim && !status) 462 nn->somebody_reclaimed = true; 463 out: 464 if (resfh && resfh != &cstate->current_fh) { 465 fh_dup2(&cstate->current_fh, resfh); 466 fh_put(resfh); 467 kfree(resfh); 468 } 469 nfsd4_cleanup_open_state(cstate, open); 470 nfsd4_bump_seqid(cstate, status); 471 return status; 472 } 473 474 /* 475 * OPEN is the only seqid-mutating operation whose decoding can fail 476 * with a seqid-mutating error (specifically, decoding of user names in 477 * the attributes). Therefore we have to do some processing to look up 478 * the stateowner so that we can bump the seqid. 479 */ 480 static __be32 nfsd4_open_omfg(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_op *op) 481 { 482 struct nfsd4_open *open = &op->u.open; 483 484 if (!seqid_mutating_err(ntohl(op->status))) 485 return op->status; 486 if (nfsd4_has_session(cstate)) 487 return op->status; 488 open->op_xdr_error = op->status; 489 return nfsd4_open(rqstp, cstate, &op->u); 490 } 491 492 /* 493 * filehandle-manipulating ops. 494 */ 495 static __be32 496 nfsd4_getfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 497 union nfsd4_op_u *u) 498 { 499 u->getfh = &cstate->current_fh; 500 return nfs_ok; 501 } 502 503 static __be32 504 nfsd4_putfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 505 union nfsd4_op_u *u) 506 { 507 struct nfsd4_putfh *putfh = &u->putfh; 508 __be32 ret; 509 510 fh_put(&cstate->current_fh); 511 cstate->current_fh.fh_handle.fh_size = putfh->pf_fhlen; 512 memcpy(&cstate->current_fh.fh_handle.fh_base, putfh->pf_fhval, 513 putfh->pf_fhlen); 514 ret = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_BYPASS_GSS); 515 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 516 if (ret == nfserr_stale && putfh->no_verify) { 517 SET_FH_FLAG(&cstate->current_fh, NFSD4_FH_FOREIGN); 518 ret = 0; 519 } 520 #endif 521 return ret; 522 } 523 524 static __be32 525 nfsd4_putrootfh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 526 union nfsd4_op_u *u) 527 { 528 __be32 status; 529 530 fh_put(&cstate->current_fh); 531 status = exp_pseudoroot(rqstp, &cstate->current_fh); 532 return status; 533 } 534 535 static __be32 536 nfsd4_restorefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 537 union nfsd4_op_u *u) 538 { 539 if (!cstate->save_fh.fh_dentry) 540 return nfserr_restorefh; 541 542 fh_dup2(&cstate->current_fh, &cstate->save_fh); 543 if (HAS_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG)) { 544 memcpy(&cstate->current_stateid, &cstate->save_stateid, sizeof(stateid_t)); 545 SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); 546 } 547 return nfs_ok; 548 } 549 550 static __be32 551 nfsd4_savefh(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 552 union nfsd4_op_u *u) 553 { 554 fh_dup2(&cstate->save_fh, &cstate->current_fh); 555 if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG)) { 556 memcpy(&cstate->save_stateid, &cstate->current_stateid, sizeof(stateid_t)); 557 SET_CSTATE_FLAG(cstate, SAVED_STATE_ID_FLAG); 558 } 559 return nfs_ok; 560 } 561 562 /* 563 * misc nfsv4 ops 564 */ 565 static __be32 566 nfsd4_access(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 567 union nfsd4_op_u *u) 568 { 569 struct nfsd4_access *access = &u->access; 570 u32 access_full; 571 572 access_full = NFS3_ACCESS_FULL; 573 if (cstate->minorversion >= 2) 574 access_full |= NFS4_ACCESS_XALIST | NFS4_ACCESS_XAREAD | 575 NFS4_ACCESS_XAWRITE; 576 577 if (access->ac_req_access & ~access_full) 578 return nfserr_inval; 579 580 access->ac_resp_access = access->ac_req_access; 581 return nfsd_access(rqstp, &cstate->current_fh, &access->ac_resp_access, 582 &access->ac_supported); 583 } 584 585 static void gen_boot_verifier(nfs4_verifier *verifier, struct net *net) 586 { 587 __be32 *verf = (__be32 *)verifier->data; 588 589 BUILD_BUG_ON(2*sizeof(*verf) != sizeof(verifier->data)); 590 591 nfsd_copy_boot_verifier(verf, net_generic(net, nfsd_net_id)); 592 } 593 594 static __be32 595 nfsd4_commit(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 596 union nfsd4_op_u *u) 597 { 598 struct nfsd4_commit *commit = &u->commit; 599 600 return nfsd_commit(rqstp, &cstate->current_fh, commit->co_offset, 601 commit->co_count, 602 (__be32 *)commit->co_verf.data); 603 } 604 605 static __be32 606 nfsd4_create(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 607 union nfsd4_op_u *u) 608 { 609 struct nfsd4_create *create = &u->create; 610 struct svc_fh resfh; 611 __be32 status; 612 dev_t rdev; 613 614 fh_init(&resfh, NFS4_FHSIZE); 615 616 status = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_NOP); 617 if (status) 618 return status; 619 620 status = check_attr_support(rqstp, cstate, create->cr_bmval, 621 nfsd_attrmask); 622 if (status) 623 return status; 624 625 current->fs->umask = create->cr_umask; 626 switch (create->cr_type) { 627 case NF4LNK: 628 status = nfsd_symlink(rqstp, &cstate->current_fh, 629 create->cr_name, create->cr_namelen, 630 create->cr_data, &resfh); 631 break; 632 633 case NF4BLK: 634 status = nfserr_inval; 635 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 636 if (MAJOR(rdev) != create->cr_specdata1 || 637 MINOR(rdev) != create->cr_specdata2) 638 goto out_umask; 639 status = nfsd_create(rqstp, &cstate->current_fh, 640 create->cr_name, create->cr_namelen, 641 &create->cr_iattr, S_IFBLK, rdev, &resfh); 642 break; 643 644 case NF4CHR: 645 status = nfserr_inval; 646 rdev = MKDEV(create->cr_specdata1, create->cr_specdata2); 647 if (MAJOR(rdev) != create->cr_specdata1 || 648 MINOR(rdev) != create->cr_specdata2) 649 goto out_umask; 650 status = nfsd_create(rqstp, &cstate->current_fh, 651 create->cr_name, create->cr_namelen, 652 &create->cr_iattr,S_IFCHR, rdev, &resfh); 653 break; 654 655 case NF4SOCK: 656 status = nfsd_create(rqstp, &cstate->current_fh, 657 create->cr_name, create->cr_namelen, 658 &create->cr_iattr, S_IFSOCK, 0, &resfh); 659 break; 660 661 case NF4FIFO: 662 status = nfsd_create(rqstp, &cstate->current_fh, 663 create->cr_name, create->cr_namelen, 664 &create->cr_iattr, S_IFIFO, 0, &resfh); 665 break; 666 667 case NF4DIR: 668 create->cr_iattr.ia_valid &= ~ATTR_SIZE; 669 status = nfsd_create(rqstp, &cstate->current_fh, 670 create->cr_name, create->cr_namelen, 671 &create->cr_iattr, S_IFDIR, 0, &resfh); 672 break; 673 674 default: 675 status = nfserr_badtype; 676 } 677 678 if (status) 679 goto out; 680 681 if (create->cr_label.len) 682 nfsd4_security_inode_setsecctx(&resfh, &create->cr_label, create->cr_bmval); 683 684 if (create->cr_acl != NULL) 685 do_set_nfs4_acl(rqstp, &resfh, create->cr_acl, 686 create->cr_bmval); 687 688 fh_unlock(&cstate->current_fh); 689 set_change_info(&create->cr_cinfo, &cstate->current_fh); 690 fh_dup2(&cstate->current_fh, &resfh); 691 out: 692 fh_put(&resfh); 693 out_umask: 694 current->fs->umask = 0; 695 return status; 696 } 697 698 static __be32 699 nfsd4_getattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 700 union nfsd4_op_u *u) 701 { 702 struct nfsd4_getattr *getattr = &u->getattr; 703 __be32 status; 704 705 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 706 if (status) 707 return status; 708 709 if (getattr->ga_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 710 return nfserr_inval; 711 712 getattr->ga_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 713 getattr->ga_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 714 getattr->ga_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 715 716 getattr->ga_fhp = &cstate->current_fh; 717 return nfs_ok; 718 } 719 720 static __be32 721 nfsd4_link(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 722 union nfsd4_op_u *u) 723 { 724 struct nfsd4_link *link = &u->link; 725 __be32 status; 726 727 status = nfsd_link(rqstp, &cstate->current_fh, 728 link->li_name, link->li_namelen, &cstate->save_fh); 729 if (!status) 730 set_change_info(&link->li_cinfo, &cstate->current_fh); 731 return status; 732 } 733 734 static __be32 nfsd4_do_lookupp(struct svc_rqst *rqstp, struct svc_fh *fh) 735 { 736 struct svc_fh tmp_fh; 737 __be32 ret; 738 739 fh_init(&tmp_fh, NFS4_FHSIZE); 740 ret = exp_pseudoroot(rqstp, &tmp_fh); 741 if (ret) 742 return ret; 743 if (tmp_fh.fh_dentry == fh->fh_dentry) { 744 fh_put(&tmp_fh); 745 return nfserr_noent; 746 } 747 fh_put(&tmp_fh); 748 return nfsd_lookup(rqstp, fh, "..", 2, fh); 749 } 750 751 static __be32 752 nfsd4_lookupp(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 753 union nfsd4_op_u *u) 754 { 755 return nfsd4_do_lookupp(rqstp, &cstate->current_fh); 756 } 757 758 static __be32 759 nfsd4_lookup(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 760 union nfsd4_op_u *u) 761 { 762 return nfsd_lookup(rqstp, &cstate->current_fh, 763 u->lookup.lo_name, u->lookup.lo_len, 764 &cstate->current_fh); 765 } 766 767 static __be32 768 nfsd4_read(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 769 union nfsd4_op_u *u) 770 { 771 struct nfsd4_read *read = &u->read; 772 __be32 status; 773 774 read->rd_nf = NULL; 775 if (read->rd_offset >= OFFSET_MAX) 776 return nfserr_inval; 777 778 trace_nfsd_read_start(rqstp, &cstate->current_fh, 779 read->rd_offset, read->rd_length); 780 781 /* 782 * If we do a zero copy read, then a client will see read data 783 * that reflects the state of the file *after* performing the 784 * following compound. 785 * 786 * To ensure proper ordering, we therefore turn off zero copy if 787 * the client wants us to do more in this compound: 788 */ 789 if (!nfsd4_last_compound_op(rqstp)) 790 clear_bit(RQ_SPLICE_OK, &rqstp->rq_flags); 791 792 /* check stateid */ 793 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 794 &read->rd_stateid, RD_STATE, 795 &read->rd_nf, NULL); 796 if (status) { 797 dprintk("NFSD: nfsd4_read: couldn't process stateid!\n"); 798 goto out; 799 } 800 status = nfs_ok; 801 out: 802 read->rd_rqstp = rqstp; 803 read->rd_fhp = &cstate->current_fh; 804 return status; 805 } 806 807 808 static void 809 nfsd4_read_release(union nfsd4_op_u *u) 810 { 811 if (u->read.rd_nf) 812 nfsd_file_put(u->read.rd_nf); 813 trace_nfsd_read_done(u->read.rd_rqstp, u->read.rd_fhp, 814 u->read.rd_offset, u->read.rd_length); 815 } 816 817 static __be32 818 nfsd4_readdir(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 819 union nfsd4_op_u *u) 820 { 821 struct nfsd4_readdir *readdir = &u->readdir; 822 u64 cookie = readdir->rd_cookie; 823 static const nfs4_verifier zeroverf; 824 825 /* no need to check permission - this will be done in nfsd_readdir() */ 826 827 if (readdir->rd_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1) 828 return nfserr_inval; 829 830 readdir->rd_bmval[0] &= nfsd_suppattrs[cstate->minorversion][0]; 831 readdir->rd_bmval[1] &= nfsd_suppattrs[cstate->minorversion][1]; 832 readdir->rd_bmval[2] &= nfsd_suppattrs[cstate->minorversion][2]; 833 834 if ((cookie == 1) || (cookie == 2) || 835 (cookie == 0 && memcmp(readdir->rd_verf.data, zeroverf.data, NFS4_VERIFIER_SIZE))) 836 return nfserr_bad_cookie; 837 838 readdir->rd_rqstp = rqstp; 839 readdir->rd_fhp = &cstate->current_fh; 840 return nfs_ok; 841 } 842 843 static __be32 844 nfsd4_readlink(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 845 union nfsd4_op_u *u) 846 { 847 u->readlink.rl_rqstp = rqstp; 848 u->readlink.rl_fhp = &cstate->current_fh; 849 return nfs_ok; 850 } 851 852 static __be32 853 nfsd4_remove(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 854 union nfsd4_op_u *u) 855 { 856 struct nfsd4_remove *remove = &u->remove; 857 __be32 status; 858 859 if (opens_in_grace(SVC_NET(rqstp))) 860 return nfserr_grace; 861 status = nfsd_unlink(rqstp, &cstate->current_fh, 0, 862 remove->rm_name, remove->rm_namelen); 863 if (!status) { 864 fh_unlock(&cstate->current_fh); 865 set_change_info(&remove->rm_cinfo, &cstate->current_fh); 866 } 867 return status; 868 } 869 870 static __be32 871 nfsd4_rename(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 872 union nfsd4_op_u *u) 873 { 874 struct nfsd4_rename *rename = &u->rename; 875 __be32 status; 876 877 if (opens_in_grace(SVC_NET(rqstp))) 878 return nfserr_grace; 879 status = nfsd_rename(rqstp, &cstate->save_fh, rename->rn_sname, 880 rename->rn_snamelen, &cstate->current_fh, 881 rename->rn_tname, rename->rn_tnamelen); 882 if (status) 883 return status; 884 set_change_info(&rename->rn_sinfo, &cstate->current_fh); 885 set_change_info(&rename->rn_tinfo, &cstate->save_fh); 886 return nfs_ok; 887 } 888 889 static __be32 890 nfsd4_secinfo(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 891 union nfsd4_op_u *u) 892 { 893 struct nfsd4_secinfo *secinfo = &u->secinfo; 894 struct svc_export *exp; 895 struct dentry *dentry; 896 __be32 err; 897 898 err = fh_verify(rqstp, &cstate->current_fh, S_IFDIR, NFSD_MAY_EXEC); 899 if (err) 900 return err; 901 err = nfsd_lookup_dentry(rqstp, &cstate->current_fh, 902 secinfo->si_name, secinfo->si_namelen, 903 &exp, &dentry); 904 if (err) 905 return err; 906 fh_unlock(&cstate->current_fh); 907 if (d_really_is_negative(dentry)) { 908 exp_put(exp); 909 err = nfserr_noent; 910 } else 911 secinfo->si_exp = exp; 912 dput(dentry); 913 if (cstate->minorversion) 914 /* See rfc 5661 section 2.6.3.1.1.8 */ 915 fh_put(&cstate->current_fh); 916 return err; 917 } 918 919 static __be32 920 nfsd4_secinfo_no_name(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 921 union nfsd4_op_u *u) 922 { 923 __be32 err; 924 925 switch (u->secinfo_no_name.sin_style) { 926 case NFS4_SECINFO_STYLE4_CURRENT_FH: 927 break; 928 case NFS4_SECINFO_STYLE4_PARENT: 929 err = nfsd4_do_lookupp(rqstp, &cstate->current_fh); 930 if (err) 931 return err; 932 break; 933 default: 934 return nfserr_inval; 935 } 936 937 u->secinfo_no_name.sin_exp = exp_get(cstate->current_fh.fh_export); 938 fh_put(&cstate->current_fh); 939 return nfs_ok; 940 } 941 942 static void 943 nfsd4_secinfo_release(union nfsd4_op_u *u) 944 { 945 if (u->secinfo.si_exp) 946 exp_put(u->secinfo.si_exp); 947 } 948 949 static void 950 nfsd4_secinfo_no_name_release(union nfsd4_op_u *u) 951 { 952 if (u->secinfo_no_name.sin_exp) 953 exp_put(u->secinfo_no_name.sin_exp); 954 } 955 956 static __be32 957 nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 958 union nfsd4_op_u *u) 959 { 960 struct nfsd4_setattr *setattr = &u->setattr; 961 __be32 status = nfs_ok; 962 int err; 963 964 if (setattr->sa_iattr.ia_valid & ATTR_SIZE) { 965 status = nfs4_preprocess_stateid_op(rqstp, cstate, 966 &cstate->current_fh, &setattr->sa_stateid, 967 WR_STATE, NULL, NULL); 968 if (status) { 969 dprintk("NFSD: nfsd4_setattr: couldn't process stateid!\n"); 970 return status; 971 } 972 } 973 err = fh_want_write(&cstate->current_fh); 974 if (err) 975 return nfserrno(err); 976 status = nfs_ok; 977 978 status = check_attr_support(rqstp, cstate, setattr->sa_bmval, 979 nfsd_attrmask); 980 if (status) 981 goto out; 982 983 if (setattr->sa_acl != NULL) 984 status = nfsd4_set_nfs4_acl(rqstp, &cstate->current_fh, 985 setattr->sa_acl); 986 if (status) 987 goto out; 988 if (setattr->sa_label.len) 989 status = nfsd4_set_nfs4_label(rqstp, &cstate->current_fh, 990 &setattr->sa_label); 991 if (status) 992 goto out; 993 status = nfsd_setattr(rqstp, &cstate->current_fh, &setattr->sa_iattr, 994 0, (time64_t)0); 995 out: 996 fh_drop_write(&cstate->current_fh); 997 return status; 998 } 999 1000 static __be32 1001 nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1002 union nfsd4_op_u *u) 1003 { 1004 struct nfsd4_write *write = &u->write; 1005 stateid_t *stateid = &write->wr_stateid; 1006 struct nfsd_file *nf = NULL; 1007 __be32 status = nfs_ok; 1008 unsigned long cnt; 1009 int nvecs; 1010 1011 if (write->wr_offset >= OFFSET_MAX) 1012 return nfserr_inval; 1013 1014 cnt = write->wr_buflen; 1015 trace_nfsd_write_start(rqstp, &cstate->current_fh, 1016 write->wr_offset, cnt); 1017 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1018 stateid, WR_STATE, &nf, NULL); 1019 if (status) { 1020 dprintk("NFSD: nfsd4_write: couldn't process stateid!\n"); 1021 return status; 1022 } 1023 1024 write->wr_how_written = write->wr_stable_how; 1025 1026 nvecs = svc_fill_write_vector(rqstp, write->wr_payload.pages, 1027 write->wr_payload.head, write->wr_buflen); 1028 WARN_ON_ONCE(nvecs > ARRAY_SIZE(rqstp->rq_vec)); 1029 1030 status = nfsd_vfs_write(rqstp, &cstate->current_fh, nf, 1031 write->wr_offset, rqstp->rq_vec, nvecs, &cnt, 1032 write->wr_how_written, 1033 (__be32 *)write->wr_verifier.data); 1034 nfsd_file_put(nf); 1035 1036 write->wr_bytes_written = cnt; 1037 trace_nfsd_write_done(rqstp, &cstate->current_fh, 1038 write->wr_offset, cnt); 1039 return status; 1040 } 1041 1042 static __be32 1043 nfsd4_verify_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1044 stateid_t *src_stateid, struct nfsd_file **src, 1045 stateid_t *dst_stateid, struct nfsd_file **dst) 1046 { 1047 __be32 status; 1048 1049 if (!cstate->save_fh.fh_dentry) 1050 return nfserr_nofilehandle; 1051 1052 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->save_fh, 1053 src_stateid, RD_STATE, src, NULL); 1054 if (status) { 1055 dprintk("NFSD: %s: couldn't process src stateid!\n", __func__); 1056 goto out; 1057 } 1058 1059 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1060 dst_stateid, WR_STATE, dst, NULL); 1061 if (status) { 1062 dprintk("NFSD: %s: couldn't process dst stateid!\n", __func__); 1063 goto out_put_src; 1064 } 1065 1066 /* fix up for NFS-specific error code */ 1067 if (!S_ISREG(file_inode((*src)->nf_file)->i_mode) || 1068 !S_ISREG(file_inode((*dst)->nf_file)->i_mode)) { 1069 status = nfserr_wrong_type; 1070 goto out_put_dst; 1071 } 1072 1073 out: 1074 return status; 1075 out_put_dst: 1076 nfsd_file_put(*dst); 1077 out_put_src: 1078 nfsd_file_put(*src); 1079 goto out; 1080 } 1081 1082 static __be32 1083 nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1084 union nfsd4_op_u *u) 1085 { 1086 struct nfsd4_clone *clone = &u->clone; 1087 struct nfsd_file *src, *dst; 1088 __be32 status; 1089 1090 status = nfsd4_verify_copy(rqstp, cstate, &clone->cl_src_stateid, &src, 1091 &clone->cl_dst_stateid, &dst); 1092 if (status) 1093 goto out; 1094 1095 status = nfsd4_clone_file_range(src, clone->cl_src_pos, 1096 dst, clone->cl_dst_pos, clone->cl_count, 1097 EX_ISSYNC(cstate->current_fh.fh_export)); 1098 1099 nfsd_file_put(dst); 1100 nfsd_file_put(src); 1101 out: 1102 return status; 1103 } 1104 1105 void nfs4_put_copy(struct nfsd4_copy *copy) 1106 { 1107 if (!refcount_dec_and_test(©->refcount)) 1108 return; 1109 kfree(copy); 1110 } 1111 1112 static bool 1113 check_and_set_stop_copy(struct nfsd4_copy *copy) 1114 { 1115 bool value; 1116 1117 spin_lock(©->cp_clp->async_lock); 1118 value = copy->stopped; 1119 if (!copy->stopped) 1120 copy->stopped = true; 1121 spin_unlock(©->cp_clp->async_lock); 1122 return value; 1123 } 1124 1125 static void nfsd4_stop_copy(struct nfsd4_copy *copy) 1126 { 1127 /* only 1 thread should stop the copy */ 1128 if (!check_and_set_stop_copy(copy)) 1129 kthread_stop(copy->copy_task); 1130 nfs4_put_copy(copy); 1131 } 1132 1133 static struct nfsd4_copy *nfsd4_get_copy(struct nfs4_client *clp) 1134 { 1135 struct nfsd4_copy *copy = NULL; 1136 1137 spin_lock(&clp->async_lock); 1138 if (!list_empty(&clp->async_copies)) { 1139 copy = list_first_entry(&clp->async_copies, struct nfsd4_copy, 1140 copies); 1141 refcount_inc(©->refcount); 1142 } 1143 spin_unlock(&clp->async_lock); 1144 return copy; 1145 } 1146 1147 void nfsd4_shutdown_copy(struct nfs4_client *clp) 1148 { 1149 struct nfsd4_copy *copy; 1150 1151 while ((copy = nfsd4_get_copy(clp)) != NULL) 1152 nfsd4_stop_copy(copy); 1153 } 1154 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 1155 1156 extern struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, 1157 struct nfs_fh *src_fh, 1158 nfs4_stateid *stateid); 1159 extern void nfs42_ssc_close(struct file *filep); 1160 1161 extern void nfs_sb_deactive(struct super_block *sb); 1162 1163 #define NFSD42_INTERSSC_MOUNTOPS "vers=4.2,addr=%s,sec=sys" 1164 1165 /* 1166 * Support one copy source server for now. 1167 */ 1168 static __be32 1169 nfsd4_interssc_connect(struct nl4_server *nss, struct svc_rqst *rqstp, 1170 struct vfsmount **mount) 1171 { 1172 struct file_system_type *type; 1173 struct vfsmount *ss_mnt; 1174 struct nfs42_netaddr *naddr; 1175 struct sockaddr_storage tmp_addr; 1176 size_t tmp_addrlen, match_netid_len = 3; 1177 char *startsep = "", *endsep = "", *match_netid = "tcp"; 1178 char *ipaddr, *dev_name, *raw_data; 1179 int len, raw_len; 1180 __be32 status = nfserr_inval; 1181 1182 naddr = &nss->u.nl4_addr; 1183 tmp_addrlen = rpc_uaddr2sockaddr(SVC_NET(rqstp), naddr->addr, 1184 naddr->addr_len, 1185 (struct sockaddr *)&tmp_addr, 1186 sizeof(tmp_addr)); 1187 if (tmp_addrlen == 0) 1188 goto out_err; 1189 1190 if (tmp_addr.ss_family == AF_INET6) { 1191 startsep = "["; 1192 endsep = "]"; 1193 match_netid = "tcp6"; 1194 match_netid_len = 4; 1195 } 1196 1197 if (naddr->netid_len != match_netid_len || 1198 strncmp(naddr->netid, match_netid, naddr->netid_len)) 1199 goto out_err; 1200 1201 /* Construct the raw data for the vfs_kern_mount call */ 1202 len = RPC_MAX_ADDRBUFLEN + 1; 1203 ipaddr = kzalloc(len, GFP_KERNEL); 1204 if (!ipaddr) 1205 goto out_err; 1206 1207 rpc_ntop((struct sockaddr *)&tmp_addr, ipaddr, len); 1208 1209 /* 2 for ipv6 endsep and startsep. 3 for ":/" and trailing '/0'*/ 1210 1211 raw_len = strlen(NFSD42_INTERSSC_MOUNTOPS) + strlen(ipaddr); 1212 raw_data = kzalloc(raw_len, GFP_KERNEL); 1213 if (!raw_data) 1214 goto out_free_ipaddr; 1215 1216 snprintf(raw_data, raw_len, NFSD42_INTERSSC_MOUNTOPS, ipaddr); 1217 1218 status = nfserr_nodev; 1219 type = get_fs_type("nfs"); 1220 if (!type) 1221 goto out_free_rawdata; 1222 1223 /* Set the server:<export> for the vfs_kern_mount call */ 1224 dev_name = kzalloc(len + 5, GFP_KERNEL); 1225 if (!dev_name) 1226 goto out_free_rawdata; 1227 snprintf(dev_name, len + 5, "%s%s%s:/", startsep, ipaddr, endsep); 1228 1229 /* Use an 'internal' mount: SB_KERNMOUNT -> MNT_INTERNAL */ 1230 ss_mnt = vfs_kern_mount(type, SB_KERNMOUNT, dev_name, raw_data); 1231 module_put(type->owner); 1232 if (IS_ERR(ss_mnt)) 1233 goto out_free_devname; 1234 1235 status = 0; 1236 *mount = ss_mnt; 1237 1238 out_free_devname: 1239 kfree(dev_name); 1240 out_free_rawdata: 1241 kfree(raw_data); 1242 out_free_ipaddr: 1243 kfree(ipaddr); 1244 out_err: 1245 return status; 1246 } 1247 1248 static void 1249 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt) 1250 { 1251 nfs_do_sb_deactive(ss_mnt->mnt_sb); 1252 mntput(ss_mnt); 1253 } 1254 1255 /* 1256 * Verify COPY destination stateid. 1257 * 1258 * Connect to the source server with NFSv4.1. 1259 * Create the source struct file for nfsd_copy_range. 1260 * Called with COPY cstate: 1261 * SAVED_FH: source filehandle 1262 * CURRENT_FH: destination filehandle 1263 */ 1264 static __be32 1265 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, 1266 struct nfsd4_compound_state *cstate, 1267 struct nfsd4_copy *copy, struct vfsmount **mount) 1268 { 1269 struct svc_fh *s_fh = NULL; 1270 stateid_t *s_stid = ©->cp_src_stateid; 1271 __be32 status = nfserr_inval; 1272 1273 /* Verify the destination stateid and set dst struct file*/ 1274 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1275 ©->cp_dst_stateid, 1276 WR_STATE, ©->nf_dst, NULL); 1277 if (status) 1278 goto out; 1279 1280 status = nfsd4_interssc_connect(©->cp_src, rqstp, mount); 1281 if (status) 1282 goto out; 1283 1284 s_fh = &cstate->save_fh; 1285 1286 copy->c_fh.size = s_fh->fh_handle.fh_size; 1287 memcpy(copy->c_fh.data, &s_fh->fh_handle.fh_base, copy->c_fh.size); 1288 copy->stateid.seqid = cpu_to_be32(s_stid->si_generation); 1289 memcpy(copy->stateid.other, (void *)&s_stid->si_opaque, 1290 sizeof(stateid_opaque_t)); 1291 1292 status = 0; 1293 out: 1294 return status; 1295 } 1296 1297 static void 1298 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src, 1299 struct nfsd_file *dst) 1300 { 1301 nfs42_ssc_close(src->nf_file); 1302 /* 'src' is freed by nfsd4_do_async_copy */ 1303 nfsd_file_put(dst); 1304 mntput(ss_mnt); 1305 } 1306 1307 #else /* CONFIG_NFSD_V4_2_INTER_SSC */ 1308 1309 static __be32 1310 nfsd4_setup_inter_ssc(struct svc_rqst *rqstp, 1311 struct nfsd4_compound_state *cstate, 1312 struct nfsd4_copy *copy, 1313 struct vfsmount **mount) 1314 { 1315 *mount = NULL; 1316 return nfserr_inval; 1317 } 1318 1319 static void 1320 nfsd4_cleanup_inter_ssc(struct vfsmount *ss_mnt, struct nfsd_file *src, 1321 struct nfsd_file *dst) 1322 { 1323 } 1324 1325 static void 1326 nfsd4_interssc_disconnect(struct vfsmount *ss_mnt) 1327 { 1328 } 1329 1330 static struct file *nfs42_ssc_open(struct vfsmount *ss_mnt, 1331 struct nfs_fh *src_fh, 1332 nfs4_stateid *stateid) 1333 { 1334 return NULL; 1335 } 1336 #endif /* CONFIG_NFSD_V4_2_INTER_SSC */ 1337 1338 static __be32 1339 nfsd4_setup_intra_ssc(struct svc_rqst *rqstp, 1340 struct nfsd4_compound_state *cstate, 1341 struct nfsd4_copy *copy) 1342 { 1343 return nfsd4_verify_copy(rqstp, cstate, ©->cp_src_stateid, 1344 ©->nf_src, ©->cp_dst_stateid, 1345 ©->nf_dst); 1346 } 1347 1348 static void 1349 nfsd4_cleanup_intra_ssc(struct nfsd_file *src, struct nfsd_file *dst) 1350 { 1351 nfsd_file_put(src); 1352 nfsd_file_put(dst); 1353 } 1354 1355 static void nfsd4_cb_offload_release(struct nfsd4_callback *cb) 1356 { 1357 struct nfsd4_copy *copy = container_of(cb, struct nfsd4_copy, cp_cb); 1358 1359 nfs4_put_copy(copy); 1360 } 1361 1362 static int nfsd4_cb_offload_done(struct nfsd4_callback *cb, 1363 struct rpc_task *task) 1364 { 1365 return 1; 1366 } 1367 1368 static const struct nfsd4_callback_ops nfsd4_cb_offload_ops = { 1369 .release = nfsd4_cb_offload_release, 1370 .done = nfsd4_cb_offload_done 1371 }; 1372 1373 static void nfsd4_init_copy_res(struct nfsd4_copy *copy, bool sync) 1374 { 1375 copy->cp_res.wr_stable_how = NFS_UNSTABLE; 1376 copy->cp_synchronous = sync; 1377 gen_boot_verifier(©->cp_res.wr_verifier, copy->cp_clp->net); 1378 } 1379 1380 static ssize_t _nfsd_copy_file_range(struct nfsd4_copy *copy) 1381 { 1382 ssize_t bytes_copied = 0; 1383 size_t bytes_total = copy->cp_count; 1384 u64 src_pos = copy->cp_src_pos; 1385 u64 dst_pos = copy->cp_dst_pos; 1386 1387 do { 1388 if (kthread_should_stop()) 1389 break; 1390 bytes_copied = nfsd_copy_file_range(copy->nf_src->nf_file, 1391 src_pos, copy->nf_dst->nf_file, dst_pos, 1392 bytes_total); 1393 if (bytes_copied <= 0) 1394 break; 1395 bytes_total -= bytes_copied; 1396 copy->cp_res.wr_bytes_written += bytes_copied; 1397 src_pos += bytes_copied; 1398 dst_pos += bytes_copied; 1399 } while (bytes_total > 0 && !copy->cp_synchronous); 1400 return bytes_copied; 1401 } 1402 1403 static __be32 nfsd4_do_copy(struct nfsd4_copy *copy, bool sync) 1404 { 1405 __be32 status; 1406 ssize_t bytes; 1407 1408 bytes = _nfsd_copy_file_range(copy); 1409 /* for async copy, we ignore the error, client can always retry 1410 * to get the error 1411 */ 1412 if (bytes < 0 && !copy->cp_res.wr_bytes_written) 1413 status = nfserrno(bytes); 1414 else { 1415 nfsd4_init_copy_res(copy, sync); 1416 status = nfs_ok; 1417 } 1418 1419 if (!copy->cp_intra) /* Inter server SSC */ 1420 nfsd4_cleanup_inter_ssc(copy->ss_mnt, copy->nf_src, 1421 copy->nf_dst); 1422 else 1423 nfsd4_cleanup_intra_ssc(copy->nf_src, copy->nf_dst); 1424 1425 return status; 1426 } 1427 1428 static void dup_copy_fields(struct nfsd4_copy *src, struct nfsd4_copy *dst) 1429 { 1430 dst->cp_src_pos = src->cp_src_pos; 1431 dst->cp_dst_pos = src->cp_dst_pos; 1432 dst->cp_count = src->cp_count; 1433 dst->cp_synchronous = src->cp_synchronous; 1434 memcpy(&dst->cp_res, &src->cp_res, sizeof(src->cp_res)); 1435 memcpy(&dst->fh, &src->fh, sizeof(src->fh)); 1436 dst->cp_clp = src->cp_clp; 1437 dst->nf_dst = nfsd_file_get(src->nf_dst); 1438 dst->cp_intra = src->cp_intra; 1439 if (src->cp_intra) /* for inter, file_src doesn't exist yet */ 1440 dst->nf_src = nfsd_file_get(src->nf_src); 1441 1442 memcpy(&dst->cp_stateid, &src->cp_stateid, sizeof(src->cp_stateid)); 1443 memcpy(&dst->cp_src, &src->cp_src, sizeof(struct nl4_server)); 1444 memcpy(&dst->stateid, &src->stateid, sizeof(src->stateid)); 1445 memcpy(&dst->c_fh, &src->c_fh, sizeof(src->c_fh)); 1446 dst->ss_mnt = src->ss_mnt; 1447 } 1448 1449 static void cleanup_async_copy(struct nfsd4_copy *copy) 1450 { 1451 nfs4_free_copy_state(copy); 1452 nfsd_file_put(copy->nf_dst); 1453 if (copy->cp_intra) 1454 nfsd_file_put(copy->nf_src); 1455 spin_lock(©->cp_clp->async_lock); 1456 list_del(©->copies); 1457 spin_unlock(©->cp_clp->async_lock); 1458 nfs4_put_copy(copy); 1459 } 1460 1461 static int nfsd4_do_async_copy(void *data) 1462 { 1463 struct nfsd4_copy *copy = (struct nfsd4_copy *)data; 1464 struct nfsd4_copy *cb_copy; 1465 1466 if (!copy->cp_intra) { /* Inter server SSC */ 1467 copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL); 1468 if (!copy->nf_src) { 1469 copy->nfserr = nfserr_serverfault; 1470 nfsd4_interssc_disconnect(copy->ss_mnt); 1471 goto do_callback; 1472 } 1473 copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, ©->c_fh, 1474 ©->stateid); 1475 if (IS_ERR(copy->nf_src->nf_file)) { 1476 copy->nfserr = nfserr_offload_denied; 1477 nfsd4_interssc_disconnect(copy->ss_mnt); 1478 goto do_callback; 1479 } 1480 } 1481 1482 copy->nfserr = nfsd4_do_copy(copy, 0); 1483 do_callback: 1484 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1485 if (!cb_copy) 1486 goto out; 1487 refcount_set(&cb_copy->refcount, 1); 1488 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res)); 1489 cb_copy->cp_clp = copy->cp_clp; 1490 cb_copy->nfserr = copy->nfserr; 1491 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh)); 1492 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp, 1493 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD); 1494 nfsd4_run_cb(&cb_copy->cp_cb); 1495 out: 1496 if (!copy->cp_intra) 1497 kfree(copy->nf_src); 1498 cleanup_async_copy(copy); 1499 return 0; 1500 } 1501 1502 static __be32 1503 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1504 union nfsd4_op_u *u) 1505 { 1506 struct nfsd4_copy *copy = &u->copy; 1507 __be32 status; 1508 struct nfsd4_copy *async_copy = NULL; 1509 1510 if (!copy->cp_intra) { /* Inter server SSC */ 1511 if (!inter_copy_offload_enable || copy->cp_synchronous) { 1512 status = nfserr_notsupp; 1513 goto out; 1514 } 1515 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy, 1516 ©->ss_mnt); 1517 if (status) 1518 return nfserr_offload_denied; 1519 } else { 1520 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy); 1521 if (status) 1522 return status; 1523 } 1524 1525 copy->cp_clp = cstate->clp; 1526 memcpy(©->fh, &cstate->current_fh.fh_handle, 1527 sizeof(struct knfsd_fh)); 1528 if (!copy->cp_synchronous) { 1529 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1530 1531 status = nfserrno(-ENOMEM); 1532 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1533 if (!async_copy) 1534 goto out_err; 1535 if (!nfs4_init_copy_state(nn, copy)) 1536 goto out_err; 1537 refcount_set(&async_copy->refcount, 1); 1538 memcpy(©->cp_res.cb_stateid, ©->cp_stateid, 1539 sizeof(copy->cp_stateid)); 1540 dup_copy_fields(copy, async_copy); 1541 async_copy->copy_task = kthread_create(nfsd4_do_async_copy, 1542 async_copy, "%s", "copy thread"); 1543 if (IS_ERR(async_copy->copy_task)) 1544 goto out_err; 1545 spin_lock(&async_copy->cp_clp->async_lock); 1546 list_add(&async_copy->copies, 1547 &async_copy->cp_clp->async_copies); 1548 spin_unlock(&async_copy->cp_clp->async_lock); 1549 wake_up_process(async_copy->copy_task); 1550 status = nfs_ok; 1551 } else { 1552 status = nfsd4_do_copy(copy, 1); 1553 } 1554 out: 1555 return status; 1556 out_err: 1557 if (async_copy) 1558 cleanup_async_copy(async_copy); 1559 status = nfserrno(-ENOMEM); 1560 if (!copy->cp_intra) 1561 nfsd4_interssc_disconnect(copy->ss_mnt); 1562 goto out; 1563 } 1564 1565 struct nfsd4_copy * 1566 find_async_copy(struct nfs4_client *clp, stateid_t *stateid) 1567 { 1568 struct nfsd4_copy *copy; 1569 1570 spin_lock(&clp->async_lock); 1571 list_for_each_entry(copy, &clp->async_copies, copies) { 1572 if (memcmp(©->cp_stateid.stid, stateid, NFS4_STATEID_SIZE)) 1573 continue; 1574 refcount_inc(©->refcount); 1575 spin_unlock(&clp->async_lock); 1576 return copy; 1577 } 1578 spin_unlock(&clp->async_lock); 1579 return NULL; 1580 } 1581 1582 static __be32 1583 nfsd4_offload_cancel(struct svc_rqst *rqstp, 1584 struct nfsd4_compound_state *cstate, 1585 union nfsd4_op_u *u) 1586 { 1587 struct nfsd4_offload_status *os = &u->offload_status; 1588 struct nfsd4_copy *copy; 1589 struct nfs4_client *clp = cstate->clp; 1590 1591 copy = find_async_copy(clp, &os->stateid); 1592 if (!copy) { 1593 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1594 1595 return manage_cpntf_state(nn, &os->stateid, clp, NULL); 1596 } else 1597 nfsd4_stop_copy(copy); 1598 1599 return nfs_ok; 1600 } 1601 1602 static __be32 1603 nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1604 union nfsd4_op_u *u) 1605 { 1606 struct nfsd4_copy_notify *cn = &u->copy_notify; 1607 __be32 status; 1608 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1609 struct nfs4_stid *stid; 1610 struct nfs4_cpntf_state *cps; 1611 struct nfs4_client *clp = cstate->clp; 1612 1613 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1614 &cn->cpn_src_stateid, RD_STATE, NULL, 1615 &stid); 1616 if (status) 1617 return status; 1618 1619 cn->cpn_sec = nn->nfsd4_lease; 1620 cn->cpn_nsec = 0; 1621 1622 status = nfserrno(-ENOMEM); 1623 cps = nfs4_alloc_init_cpntf_state(nn, stid); 1624 if (!cps) 1625 goto out; 1626 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t)); 1627 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t)); 1628 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t)); 1629 1630 /* For now, only return one server address in cpn_src, the 1631 * address used by the client to connect to this server. 1632 */ 1633 cn->cpn_src.nl4_type = NL4_NETADDR; 1634 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr, 1635 &cn->cpn_src.u.nl4_addr); 1636 WARN_ON_ONCE(status); 1637 if (status) { 1638 nfs4_put_cpntf_state(nn, cps); 1639 goto out; 1640 } 1641 out: 1642 nfs4_put_stid(stid); 1643 return status; 1644 } 1645 1646 static __be32 1647 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1648 struct nfsd4_fallocate *fallocate, int flags) 1649 { 1650 __be32 status; 1651 struct nfsd_file *nf; 1652 1653 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1654 &fallocate->falloc_stateid, 1655 WR_STATE, &nf, NULL); 1656 if (status != nfs_ok) { 1657 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1658 return status; 1659 } 1660 1661 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file, 1662 fallocate->falloc_offset, 1663 fallocate->falloc_length, 1664 flags); 1665 nfsd_file_put(nf); 1666 return status; 1667 } 1668 static __be32 1669 nfsd4_offload_status(struct svc_rqst *rqstp, 1670 struct nfsd4_compound_state *cstate, 1671 union nfsd4_op_u *u) 1672 { 1673 struct nfsd4_offload_status *os = &u->offload_status; 1674 __be32 status = 0; 1675 struct nfsd4_copy *copy; 1676 struct nfs4_client *clp = cstate->clp; 1677 1678 copy = find_async_copy(clp, &os->stateid); 1679 if (copy) { 1680 os->count = copy->cp_res.wr_bytes_written; 1681 nfs4_put_copy(copy); 1682 } else 1683 status = nfserr_bad_stateid; 1684 1685 return status; 1686 } 1687 1688 static __be32 1689 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1690 union nfsd4_op_u *u) 1691 { 1692 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0); 1693 } 1694 1695 static __be32 1696 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1697 union nfsd4_op_u *u) 1698 { 1699 return nfsd4_fallocate(rqstp, cstate, &u->deallocate, 1700 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1701 } 1702 1703 static __be32 1704 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1705 union nfsd4_op_u *u) 1706 { 1707 struct nfsd4_seek *seek = &u->seek; 1708 int whence; 1709 __be32 status; 1710 struct nfsd_file *nf; 1711 1712 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1713 &seek->seek_stateid, 1714 RD_STATE, &nf, NULL); 1715 if (status) { 1716 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1717 return status; 1718 } 1719 1720 switch (seek->seek_whence) { 1721 case NFS4_CONTENT_DATA: 1722 whence = SEEK_DATA; 1723 break; 1724 case NFS4_CONTENT_HOLE: 1725 whence = SEEK_HOLE; 1726 break; 1727 default: 1728 status = nfserr_union_notsupp; 1729 goto out; 1730 } 1731 1732 /* 1733 * Note: This call does change file->f_pos, but nothing in NFSD 1734 * should ever file->f_pos. 1735 */ 1736 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence); 1737 if (seek->seek_pos < 0) 1738 status = nfserrno(seek->seek_pos); 1739 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file))) 1740 seek->seek_eof = true; 1741 1742 out: 1743 nfsd_file_put(nf); 1744 return status; 1745 } 1746 1747 /* This routine never returns NFS_OK! If there are no other errors, it 1748 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1749 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1750 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1751 */ 1752 static __be32 1753 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1754 struct nfsd4_verify *verify) 1755 { 1756 __be32 *buf, *p; 1757 int count; 1758 __be32 status; 1759 1760 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1761 if (status) 1762 return status; 1763 1764 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1765 if (status) 1766 return status; 1767 1768 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1769 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1770 return nfserr_inval; 1771 if (verify->ve_attrlen & 3) 1772 return nfserr_inval; 1773 1774 /* count in words: 1775 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1776 */ 1777 count = 4 + (verify->ve_attrlen >> 2); 1778 buf = kmalloc(count << 2, GFP_KERNEL); 1779 if (!buf) 1780 return nfserr_jukebox; 1781 1782 p = buf; 1783 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1784 cstate->current_fh.fh_export, 1785 cstate->current_fh.fh_dentry, 1786 verify->ve_bmval, 1787 rqstp, 0); 1788 /* 1789 * If nfsd4_encode_fattr() ran out of space, assume that's because 1790 * the attributes are longer (hence different) than those given: 1791 */ 1792 if (status == nfserr_resource) 1793 status = nfserr_not_same; 1794 if (status) 1795 goto out_kfree; 1796 1797 /* skip bitmap */ 1798 p = buf + 1 + ntohl(buf[0]); 1799 status = nfserr_not_same; 1800 if (ntohl(*p++) != verify->ve_attrlen) 1801 goto out_kfree; 1802 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1803 status = nfserr_same; 1804 1805 out_kfree: 1806 kfree(buf); 1807 return status; 1808 } 1809 1810 static __be32 1811 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1812 union nfsd4_op_u *u) 1813 { 1814 __be32 status; 1815 1816 status = _nfsd4_verify(rqstp, cstate, &u->verify); 1817 return status == nfserr_not_same ? nfs_ok : status; 1818 } 1819 1820 static __be32 1821 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1822 union nfsd4_op_u *u) 1823 { 1824 __be32 status; 1825 1826 status = _nfsd4_verify(rqstp, cstate, &u->nverify); 1827 return status == nfserr_same ? nfs_ok : status; 1828 } 1829 1830 #ifdef CONFIG_NFSD_PNFS 1831 static const struct nfsd4_layout_ops * 1832 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1833 { 1834 if (!exp->ex_layout_types) { 1835 dprintk("%s: export does not support pNFS\n", __func__); 1836 return NULL; 1837 } 1838 1839 if (layout_type >= LAYOUT_TYPE_MAX || 1840 !(exp->ex_layout_types & (1 << layout_type))) { 1841 dprintk("%s: layout type %d not supported\n", 1842 __func__, layout_type); 1843 return NULL; 1844 } 1845 1846 return nfsd4_layout_ops[layout_type]; 1847 } 1848 1849 static __be32 1850 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1851 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1852 { 1853 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo; 1854 const struct nfsd4_layout_ops *ops; 1855 struct nfsd4_deviceid_map *map; 1856 struct svc_export *exp; 1857 __be32 nfserr; 1858 1859 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1860 __func__, 1861 gdp->gd_layout_type, 1862 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1863 gdp->gd_maxcount); 1864 1865 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1866 if (!map) { 1867 dprintk("%s: couldn't find device ID to export mapping!\n", 1868 __func__); 1869 return nfserr_noent; 1870 } 1871 1872 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1873 if (IS_ERR(exp)) { 1874 dprintk("%s: could not find device id\n", __func__); 1875 return nfserr_noent; 1876 } 1877 1878 nfserr = nfserr_layoutunavailable; 1879 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1880 if (!ops) 1881 goto out; 1882 1883 nfserr = nfs_ok; 1884 if (gdp->gd_maxcount != 0) { 1885 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1886 rqstp, cstate->session->se_client, gdp); 1887 } 1888 1889 gdp->gd_notify_types &= ops->notify_types; 1890 out: 1891 exp_put(exp); 1892 return nfserr; 1893 } 1894 1895 static void 1896 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u) 1897 { 1898 kfree(u->getdeviceinfo.gd_device); 1899 } 1900 1901 static __be32 1902 nfsd4_layoutget(struct svc_rqst *rqstp, 1903 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1904 { 1905 struct nfsd4_layoutget *lgp = &u->layoutget; 1906 struct svc_fh *current_fh = &cstate->current_fh; 1907 const struct nfsd4_layout_ops *ops; 1908 struct nfs4_layout_stateid *ls; 1909 __be32 nfserr; 1910 int accmode = NFSD_MAY_READ_IF_EXEC; 1911 1912 switch (lgp->lg_seg.iomode) { 1913 case IOMODE_READ: 1914 accmode |= NFSD_MAY_READ; 1915 break; 1916 case IOMODE_RW: 1917 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE; 1918 break; 1919 default: 1920 dprintk("%s: invalid iomode %d\n", 1921 __func__, lgp->lg_seg.iomode); 1922 nfserr = nfserr_badiomode; 1923 goto out; 1924 } 1925 1926 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1927 if (nfserr) 1928 goto out; 1929 1930 nfserr = nfserr_layoutunavailable; 1931 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1932 if (!ops) 1933 goto out; 1934 1935 /* 1936 * Verify minlength and range as per RFC5661: 1937 * o If loga_length is less than loga_minlength, 1938 * the metadata server MUST return NFS4ERR_INVAL. 1939 * o If the sum of loga_offset and loga_minlength exceeds 1940 * NFS4_UINT64_MAX, and loga_minlength is not 1941 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1942 * o If the sum of loga_offset and loga_length exceeds 1943 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1944 * the error NFS4ERR_INVAL MUST result. 1945 */ 1946 nfserr = nfserr_inval; 1947 if (lgp->lg_seg.length < lgp->lg_minlength || 1948 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1949 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1950 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1951 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1952 goto out; 1953 if (lgp->lg_seg.length == 0) 1954 goto out; 1955 1956 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1957 true, lgp->lg_layout_type, &ls); 1958 if (nfserr) { 1959 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid); 1960 goto out; 1961 } 1962 1963 nfserr = nfserr_recallconflict; 1964 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1965 goto out_put_stid; 1966 1967 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1968 current_fh, lgp); 1969 if (nfserr) 1970 goto out_put_stid; 1971 1972 nfserr = nfsd4_insert_layout(lgp, ls); 1973 1974 out_put_stid: 1975 mutex_unlock(&ls->ls_mutex); 1976 nfs4_put_stid(&ls->ls_stid); 1977 out: 1978 return nfserr; 1979 } 1980 1981 static void 1982 nfsd4_layoutget_release(union nfsd4_op_u *u) 1983 { 1984 kfree(u->layoutget.lg_content); 1985 } 1986 1987 static __be32 1988 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1989 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1990 { 1991 struct nfsd4_layoutcommit *lcp = &u->layoutcommit; 1992 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1993 struct svc_fh *current_fh = &cstate->current_fh; 1994 const struct nfsd4_layout_ops *ops; 1995 loff_t new_size = lcp->lc_last_wr + 1; 1996 struct inode *inode; 1997 struct nfs4_layout_stateid *ls; 1998 __be32 nfserr; 1999 2000 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 2001 if (nfserr) 2002 goto out; 2003 2004 nfserr = nfserr_layoutunavailable; 2005 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 2006 if (!ops) 2007 goto out; 2008 inode = d_inode(current_fh->fh_dentry); 2009 2010 nfserr = nfserr_inval; 2011 if (new_size <= seg->offset) { 2012 dprintk("pnfsd: last write before layout segment\n"); 2013 goto out; 2014 } 2015 if (new_size > seg->offset + seg->length) { 2016 dprintk("pnfsd: last write beyond layout segment\n"); 2017 goto out; 2018 } 2019 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 2020 dprintk("pnfsd: layoutcommit beyond EOF\n"); 2021 goto out; 2022 } 2023 2024 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 2025 false, lcp->lc_layout_type, 2026 &ls); 2027 if (nfserr) { 2028 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid); 2029 /* fixup error code as per RFC5661 */ 2030 if (nfserr == nfserr_bad_stateid) 2031 nfserr = nfserr_badlayout; 2032 goto out; 2033 } 2034 2035 /* LAYOUTCOMMIT does not require any serialization */ 2036 mutex_unlock(&ls->ls_mutex); 2037 2038 if (new_size > i_size_read(inode)) { 2039 lcp->lc_size_chg = 1; 2040 lcp->lc_newsize = new_size; 2041 } else { 2042 lcp->lc_size_chg = 0; 2043 } 2044 2045 nfserr = ops->proc_layoutcommit(inode, lcp); 2046 nfs4_put_stid(&ls->ls_stid); 2047 out: 2048 return nfserr; 2049 } 2050 2051 static __be32 2052 nfsd4_layoutreturn(struct svc_rqst *rqstp, 2053 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 2054 { 2055 struct nfsd4_layoutreturn *lrp = &u->layoutreturn; 2056 struct svc_fh *current_fh = &cstate->current_fh; 2057 __be32 nfserr; 2058 2059 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 2060 if (nfserr) 2061 goto out; 2062 2063 nfserr = nfserr_layoutunavailable; 2064 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 2065 goto out; 2066 2067 switch (lrp->lr_seg.iomode) { 2068 case IOMODE_READ: 2069 case IOMODE_RW: 2070 case IOMODE_ANY: 2071 break; 2072 default: 2073 dprintk("%s: invalid iomode %d\n", __func__, 2074 lrp->lr_seg.iomode); 2075 nfserr = nfserr_inval; 2076 goto out; 2077 } 2078 2079 switch (lrp->lr_return_type) { 2080 case RETURN_FILE: 2081 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 2082 break; 2083 case RETURN_FSID: 2084 case RETURN_ALL: 2085 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 2086 break; 2087 default: 2088 dprintk("%s: invalid return_type %d\n", __func__, 2089 lrp->lr_return_type); 2090 nfserr = nfserr_inval; 2091 break; 2092 } 2093 out: 2094 return nfserr; 2095 } 2096 #endif /* CONFIG_NFSD_PNFS */ 2097 2098 static __be32 2099 nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2100 union nfsd4_op_u *u) 2101 { 2102 struct nfsd4_getxattr *getxattr = &u->getxattr; 2103 2104 return nfsd_getxattr(rqstp, &cstate->current_fh, 2105 getxattr->getxa_name, &getxattr->getxa_buf, 2106 &getxattr->getxa_len); 2107 } 2108 2109 static __be32 2110 nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2111 union nfsd4_op_u *u) 2112 { 2113 struct nfsd4_setxattr *setxattr = &u->setxattr; 2114 __be32 ret; 2115 2116 if (opens_in_grace(SVC_NET(rqstp))) 2117 return nfserr_grace; 2118 2119 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name, 2120 setxattr->setxa_buf, setxattr->setxa_len, 2121 setxattr->setxa_flags); 2122 2123 if (!ret) 2124 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh); 2125 2126 return ret; 2127 } 2128 2129 static __be32 2130 nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2131 union nfsd4_op_u *u) 2132 { 2133 /* 2134 * Get the entire list, then copy out only the user attributes 2135 * in the encode function. 2136 */ 2137 return nfsd_listxattr(rqstp, &cstate->current_fh, 2138 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len); 2139 } 2140 2141 static __be32 2142 nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2143 union nfsd4_op_u *u) 2144 { 2145 struct nfsd4_removexattr *removexattr = &u->removexattr; 2146 __be32 ret; 2147 2148 if (opens_in_grace(SVC_NET(rqstp))) 2149 return nfserr_grace; 2150 2151 ret = nfsd_removexattr(rqstp, &cstate->current_fh, 2152 removexattr->rmxa_name); 2153 2154 if (!ret) 2155 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh); 2156 2157 return ret; 2158 } 2159 2160 /* 2161 * NULL call. 2162 */ 2163 static __be32 2164 nfsd4_proc_null(struct svc_rqst *rqstp) 2165 { 2166 return rpc_success; 2167 } 2168 2169 static inline void nfsd4_increment_op_stats(u32 opnum) 2170 { 2171 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 2172 nfsdstats.nfs4_opcount[opnum]++; 2173 } 2174 2175 static const struct nfsd4_operation nfsd4_ops[]; 2176 2177 static const char *nfsd4_op_name(unsigned opnum); 2178 2179 /* 2180 * Enforce NFSv4.1 COMPOUND ordering rules: 2181 * 2182 * Also note, enforced elsewhere: 2183 * - SEQUENCE other than as first op results in 2184 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 2185 * - BIND_CONN_TO_SESSION must be the only op in its compound. 2186 * (Enforced in nfsd4_bind_conn_to_session().) 2187 * - DESTROY_SESSION must be the final operation in a compound, if 2188 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 2189 * (Enforced in nfsd4_destroy_session().) 2190 */ 2191 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 2192 { 2193 struct nfsd4_op *first_op = &args->ops[0]; 2194 2195 /* These ordering requirements don't apply to NFSv4.0: */ 2196 if (args->minorversion == 0) 2197 return nfs_ok; 2198 /* This is weird, but OK, not our problem: */ 2199 if (args->opcnt == 0) 2200 return nfs_ok; 2201 if (first_op->status == nfserr_op_illegal) 2202 return nfs_ok; 2203 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 2204 return nfserr_op_not_in_session; 2205 if (first_op->opnum == OP_SEQUENCE) 2206 return nfs_ok; 2207 /* 2208 * So first_op is something allowed outside a session, like 2209 * EXCHANGE_ID; but then it has to be the only op in the 2210 * compound: 2211 */ 2212 if (args->opcnt != 1) 2213 return nfserr_not_only_op; 2214 return nfs_ok; 2215 } 2216 2217 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 2218 { 2219 return &nfsd4_ops[op->opnum]; 2220 } 2221 2222 bool nfsd4_cache_this_op(struct nfsd4_op *op) 2223 { 2224 if (op->opnum == OP_ILLEGAL) 2225 return false; 2226 return OPDESC(op)->op_flags & OP_CACHEME; 2227 } 2228 2229 static bool need_wrongsec_check(struct svc_rqst *rqstp) 2230 { 2231 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2232 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2233 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2234 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 2235 const struct nfsd4_operation *thisd = OPDESC(this); 2236 const struct nfsd4_operation *nextd; 2237 2238 /* 2239 * Most ops check wronsec on our own; only the putfh-like ops 2240 * have special rules. 2241 */ 2242 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 2243 return false; 2244 /* 2245 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 2246 * put-filehandle operation if we're not going to use the 2247 * result: 2248 */ 2249 if (argp->opcnt == resp->opcnt) 2250 return false; 2251 if (next->opnum == OP_ILLEGAL) 2252 return false; 2253 nextd = OPDESC(next); 2254 /* 2255 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 2256 * errors themselves as necessary; others should check for them 2257 * now: 2258 */ 2259 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 2260 } 2261 2262 static void svcxdr_init_encode(struct svc_rqst *rqstp, 2263 struct nfsd4_compoundres *resp) 2264 { 2265 struct xdr_stream *xdr = &resp->xdr; 2266 struct xdr_buf *buf = &rqstp->rq_res; 2267 struct kvec *head = buf->head; 2268 2269 xdr->buf = buf; 2270 xdr->iov = head; 2271 xdr->p = head->iov_base + head->iov_len; 2272 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 2273 /* Tail and page_len should be zero at this point: */ 2274 buf->len = buf->head[0].iov_len; 2275 xdr_reset_scratch_buffer(xdr); 2276 xdr->page_ptr = buf->pages - 1; 2277 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 2278 - rqstp->rq_auth_slack; 2279 } 2280 2281 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 2282 static void 2283 check_if_stalefh_allowed(struct nfsd4_compoundargs *args) 2284 { 2285 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL; 2286 struct nfsd4_copy *copy; 2287 struct nfsd4_putfh *putfh; 2288 int i; 2289 2290 /* traverse all operation and if it's a COPY compound, mark the 2291 * source filehandle to skip verification 2292 */ 2293 for (i = 0; i < args->opcnt; i++) { 2294 op = &args->ops[i]; 2295 if (op->opnum == OP_PUTFH) 2296 current_op = op; 2297 else if (op->opnum == OP_SAVEFH) 2298 saved_op = current_op; 2299 else if (op->opnum == OP_RESTOREFH) 2300 current_op = saved_op; 2301 else if (op->opnum == OP_COPY) { 2302 copy = (struct nfsd4_copy *)&op->u; 2303 if (!saved_op) { 2304 op->status = nfserr_nofilehandle; 2305 return; 2306 } 2307 putfh = (struct nfsd4_putfh *)&saved_op->u; 2308 if (!copy->cp_intra) 2309 putfh->no_verify = true; 2310 } 2311 } 2312 } 2313 #else 2314 static void 2315 check_if_stalefh_allowed(struct nfsd4_compoundargs *args) 2316 { 2317 } 2318 #endif 2319 2320 /* 2321 * COMPOUND call. 2322 */ 2323 static __be32 2324 nfsd4_proc_compound(struct svc_rqst *rqstp) 2325 { 2326 struct nfsd4_compoundargs *args = rqstp->rq_argp; 2327 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2328 struct nfsd4_op *op; 2329 struct nfsd4_compound_state *cstate = &resp->cstate; 2330 struct svc_fh *current_fh = &cstate->current_fh; 2331 struct svc_fh *save_fh = &cstate->save_fh; 2332 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2333 __be32 status; 2334 2335 svcxdr_init_encode(rqstp, resp); 2336 resp->tagp = resp->xdr.p; 2337 /* reserve space for: taglen, tag, and opcnt */ 2338 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 2339 resp->taglen = args->taglen; 2340 resp->tag = args->tag; 2341 resp->rqstp = rqstp; 2342 cstate->minorversion = args->minorversion; 2343 fh_init(current_fh, NFS4_FHSIZE); 2344 fh_init(save_fh, NFS4_FHSIZE); 2345 /* 2346 * Don't use the deferral mechanism for NFSv4; compounds make it 2347 * too hard to avoid non-idempotency problems. 2348 */ 2349 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2350 2351 /* 2352 * According to RFC3010, this takes precedence over all other errors. 2353 */ 2354 status = nfserr_minor_vers_mismatch; 2355 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0) 2356 goto out; 2357 status = nfserr_resource; 2358 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND) 2359 goto out; 2360 2361 status = nfs41_check_op_ordering(args); 2362 if (status) { 2363 op = &args->ops[0]; 2364 op->status = status; 2365 resp->opcnt = 1; 2366 goto encode_op; 2367 } 2368 check_if_stalefh_allowed(args); 2369 2370 rqstp->rq_lease_breaker = (void **)&cstate->clp; 2371 2372 trace_nfsd_compound(rqstp, args->opcnt); 2373 while (!status && resp->opcnt < args->opcnt) { 2374 op = &args->ops[resp->opcnt++]; 2375 2376 /* 2377 * The XDR decode routines may have pre-set op->status; 2378 * for example, if there is a miscellaneous XDR error 2379 * it will be set to nfserr_bad_xdr. 2380 */ 2381 if (op->status) { 2382 if (op->opnum == OP_OPEN) 2383 op->status = nfsd4_open_omfg(rqstp, cstate, op); 2384 goto encode_op; 2385 } 2386 if (!current_fh->fh_dentry && 2387 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) { 2388 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 2389 op->status = nfserr_nofilehandle; 2390 goto encode_op; 2391 } 2392 } else if (current_fh->fh_export && 2393 current_fh->fh_export->ex_fslocs.migrated && 2394 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 2395 op->status = nfserr_moved; 2396 goto encode_op; 2397 } 2398 2399 fh_clear_wcc(current_fh); 2400 2401 /* If op is non-idempotent */ 2402 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) { 2403 /* 2404 * Don't execute this op if we couldn't encode a 2405 * succesful reply: 2406 */ 2407 u32 plen = op->opdesc->op_rsize_bop(rqstp, op); 2408 /* 2409 * Plus if there's another operation, make sure 2410 * we'll have space to at least encode an error: 2411 */ 2412 if (resp->opcnt < args->opcnt) 2413 plen += COMPOUND_ERR_SLACK_SPACE; 2414 op->status = nfsd4_check_resp_size(resp, plen); 2415 } 2416 2417 if (op->status) 2418 goto encode_op; 2419 2420 if (op->opdesc->op_get_currentstateid) 2421 op->opdesc->op_get_currentstateid(cstate, &op->u); 2422 op->status = op->opdesc->op_func(rqstp, cstate, &op->u); 2423 2424 /* Only from SEQUENCE */ 2425 if (cstate->status == nfserr_replay_cache) { 2426 dprintk("%s NFS4.1 replay from cache\n", __func__); 2427 status = op->status; 2428 goto out; 2429 } 2430 if (!op->status) { 2431 if (op->opdesc->op_set_currentstateid) 2432 op->opdesc->op_set_currentstateid(cstate, &op->u); 2433 2434 if (op->opdesc->op_flags & OP_CLEAR_STATEID) 2435 clear_current_stateid(cstate); 2436 2437 if (current_fh->fh_export && 2438 need_wrongsec_check(rqstp)) 2439 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 2440 } 2441 encode_op: 2442 if (op->status == nfserr_replay_me) { 2443 op->replay = &cstate->replay_owner->so_replay; 2444 nfsd4_encode_replay(&resp->xdr, op); 2445 status = op->status = op->replay->rp_status; 2446 } else { 2447 nfsd4_encode_operation(resp, op); 2448 status = op->status; 2449 } 2450 2451 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status, 2452 nfsd4_op_name(op->opnum)); 2453 2454 nfsd4_cstate_clear_replay(cstate); 2455 nfsd4_increment_op_stats(op->opnum); 2456 } 2457 2458 fh_put(current_fh); 2459 fh_put(save_fh); 2460 BUG_ON(cstate->replay_owner); 2461 out: 2462 cstate->status = status; 2463 /* Reset deferral mechanism for RPC deferrals */ 2464 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2465 return rpc_success; 2466 } 2467 2468 #define op_encode_hdr_size (2) 2469 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 2470 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 2471 #define op_encode_change_info_maxsz (5) 2472 #define nfs4_fattr_bitmap_maxsz (4) 2473 2474 /* We'll fall back on returning no lockowner if run out of space: */ 2475 #define op_encode_lockowner_maxsz (0) 2476 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 2477 2478 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 2479 2480 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 2481 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 2482 op_encode_ace_maxsz) 2483 2484 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 2485 2486 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2487 { 2488 return (op_encode_hdr_size) * sizeof(__be32); 2489 } 2490 2491 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2492 { 2493 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 2494 } 2495 2496 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2497 { 2498 /* ac_supported, ac_resp_access */ 2499 return (op_encode_hdr_size + 2)* sizeof(__be32); 2500 } 2501 2502 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2503 { 2504 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 2505 } 2506 2507 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2508 { 2509 return (op_encode_hdr_size + op_encode_change_info_maxsz 2510 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2511 } 2512 2513 /* 2514 * Note since this is an idempotent operation we won't insist on failing 2515 * the op prematurely if the estimate is too large. We may turn off splice 2516 * reads unnecessarily. 2517 */ 2518 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 2519 struct nfsd4_op *op) 2520 { 2521 u32 *bmap = op->u.getattr.ga_bmval; 2522 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 2523 u32 ret = 0; 2524 2525 if (bmap0 & FATTR4_WORD0_ACL) 2526 return svc_max_payload(rqstp); 2527 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 2528 return svc_max_payload(rqstp); 2529 2530 if (bmap1 & FATTR4_WORD1_OWNER) { 2531 ret += IDMAP_NAMESZ + 4; 2532 bmap1 &= ~FATTR4_WORD1_OWNER; 2533 } 2534 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 2535 ret += IDMAP_NAMESZ + 4; 2536 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 2537 } 2538 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 2539 ret += NFS4_FHSIZE + 4; 2540 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 2541 } 2542 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 2543 ret += NFS4_MAXLABELLEN + 12; 2544 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2545 } 2546 /* 2547 * Largest of remaining attributes are 16 bytes (e.g., 2548 * supported_attributes) 2549 */ 2550 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 2551 /* bitmask, length */ 2552 ret += 20; 2553 return ret; 2554 } 2555 2556 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2557 { 2558 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE; 2559 } 2560 2561 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2562 { 2563 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2564 * sizeof(__be32); 2565 } 2566 2567 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2568 { 2569 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 2570 * sizeof(__be32); 2571 } 2572 2573 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2574 { 2575 return (op_encode_hdr_size + op_encode_stateid_maxsz 2576 + op_encode_change_info_maxsz + 1 2577 + nfs4_fattr_bitmap_maxsz 2578 + op_encode_delegation_maxsz) * sizeof(__be32); 2579 } 2580 2581 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2582 { 2583 u32 maxcount = 0, rlen = 0; 2584 2585 maxcount = svc_max_payload(rqstp); 2586 rlen = min(op->u.read.rd_length, maxcount); 2587 2588 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2589 } 2590 2591 static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2592 { 2593 u32 maxcount = svc_max_payload(rqstp); 2594 u32 rlen = min(op->u.read.rd_length, maxcount); 2595 /* 2596 * If we detect that the file changed during hole encoding, then we 2597 * recover by encoding the remaining reply as data. This means we need 2598 * to set aside enough room to encode two data segments. 2599 */ 2600 u32 seg_len = 2 * (1 + 2 + 1); 2601 2602 return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32); 2603 } 2604 2605 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2606 { 2607 u32 maxcount = 0, rlen = 0; 2608 2609 maxcount = svc_max_payload(rqstp); 2610 rlen = min(op->u.readdir.rd_maxcount, maxcount); 2611 2612 return (op_encode_hdr_size + op_encode_verifier_maxsz + 2613 XDR_QUADLEN(rlen)) * sizeof(__be32); 2614 } 2615 2616 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2617 { 2618 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE; 2619 } 2620 2621 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2622 { 2623 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2624 * sizeof(__be32); 2625 } 2626 2627 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2628 { 2629 return (op_encode_hdr_size + op_encode_change_info_maxsz 2630 + op_encode_change_info_maxsz) * sizeof(__be32); 2631 } 2632 2633 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 2634 struct nfsd4_op *op) 2635 { 2636 return (op_encode_hdr_size 2637 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 2638 } 2639 2640 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2641 { 2642 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids) 2643 * sizeof(__be32); 2644 } 2645 2646 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2647 { 2648 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2649 } 2650 2651 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2652 { 2653 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR * 2654 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32); 2655 } 2656 2657 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2658 { 2659 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 2660 sizeof(__be32); 2661 } 2662 2663 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2664 { 2665 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 2666 } 2667 2668 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2669 { 2670 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 2671 1 + 1 + /* eir_flags, spr_how */\ 2672 4 + /* spo_must_enforce & _allow with bitmap */\ 2673 2 + /*eir_server_owner.so_minor_id */\ 2674 /* eir_server_owner.so_major_id<> */\ 2675 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2676 /* eir_server_scope<> */\ 2677 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2678 1 + /* eir_server_impl_id array length */\ 2679 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 2680 } 2681 2682 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2683 { 2684 return (op_encode_hdr_size + \ 2685 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 2686 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 2687 } 2688 2689 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2690 { 2691 return (op_encode_hdr_size + \ 2692 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 2693 2 + /* csr_sequence, csr_flags */\ 2694 op_encode_channel_attrs_maxsz + \ 2695 op_encode_channel_attrs_maxsz) * sizeof(__be32); 2696 } 2697 2698 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2699 { 2700 return (op_encode_hdr_size + 2701 1 /* wr_callback */ + 2702 op_encode_stateid_maxsz /* wr_callback */ + 2703 2 /* wr_count */ + 2704 1 /* wr_committed */ + 2705 op_encode_verifier_maxsz + 2706 1 /* cr_consecutive */ + 2707 1 /* cr_synchronous */) * sizeof(__be32); 2708 } 2709 2710 static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp, 2711 struct nfsd4_op *op) 2712 { 2713 return (op_encode_hdr_size + 2714 2 /* osr_count */ + 2715 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32); 2716 } 2717 2718 static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp, 2719 struct nfsd4_op *op) 2720 { 2721 return (op_encode_hdr_size + 2722 3 /* cnr_lease_time */ + 2723 1 /* We support one cnr_source_server */ + 2724 1 /* cnr_stateid seq */ + 2725 op_encode_stateid_maxsz /* cnr_stateid */ + 2726 1 /* num cnr_source_server*/ + 2727 1 /* nl4_type */ + 2728 1 /* nl4 size */ + 2729 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */) 2730 * sizeof(__be32); 2731 } 2732 2733 #ifdef CONFIG_NFSD_PNFS 2734 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2735 { 2736 u32 maxcount = 0, rlen = 0; 2737 2738 maxcount = svc_max_payload(rqstp); 2739 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount); 2740 2741 return (op_encode_hdr_size + 2742 1 /* gd_layout_type*/ + 2743 XDR_QUADLEN(rlen) + 2744 2 /* gd_notify_types */) * sizeof(__be32); 2745 } 2746 2747 /* 2748 * At this stage we don't really know what layout driver will handle the request, 2749 * so we need to define an arbitrary upper bound here. 2750 */ 2751 #define MAX_LAYOUT_SIZE 128 2752 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2753 { 2754 return (op_encode_hdr_size + 2755 1 /* logr_return_on_close */ + 2756 op_encode_stateid_maxsz + 2757 1 /* nr of layouts */ + 2758 MAX_LAYOUT_SIZE) * sizeof(__be32); 2759 } 2760 2761 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2762 { 2763 return (op_encode_hdr_size + 2764 1 /* locr_newsize */ + 2765 2 /* ns_size */) * sizeof(__be32); 2766 } 2767 2768 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2769 { 2770 return (op_encode_hdr_size + 2771 1 /* lrs_stateid */ + 2772 op_encode_stateid_maxsz) * sizeof(__be32); 2773 } 2774 #endif /* CONFIG_NFSD_PNFS */ 2775 2776 2777 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2778 { 2779 return (op_encode_hdr_size + 3) * sizeof(__be32); 2780 } 2781 2782 static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp, 2783 struct nfsd4_op *op) 2784 { 2785 u32 maxcount, rlen; 2786 2787 maxcount = svc_max_payload(rqstp); 2788 rlen = min_t(u32, XATTR_SIZE_MAX, maxcount); 2789 2790 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2791 } 2792 2793 static inline u32 nfsd4_setxattr_rsize(struct svc_rqst *rqstp, 2794 struct nfsd4_op *op) 2795 { 2796 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2797 * sizeof(__be32); 2798 } 2799 static inline u32 nfsd4_listxattrs_rsize(struct svc_rqst *rqstp, 2800 struct nfsd4_op *op) 2801 { 2802 u32 maxcount, rlen; 2803 2804 maxcount = svc_max_payload(rqstp); 2805 rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount); 2806 2807 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2808 } 2809 2810 static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp, 2811 struct nfsd4_op *op) 2812 { 2813 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2814 * sizeof(__be32); 2815 } 2816 2817 2818 static const struct nfsd4_operation nfsd4_ops[] = { 2819 [OP_ACCESS] = { 2820 .op_func = nfsd4_access, 2821 .op_name = "OP_ACCESS", 2822 .op_rsize_bop = nfsd4_access_rsize, 2823 }, 2824 [OP_CLOSE] = { 2825 .op_func = nfsd4_close, 2826 .op_flags = OP_MODIFIES_SOMETHING, 2827 .op_name = "OP_CLOSE", 2828 .op_rsize_bop = nfsd4_status_stateid_rsize, 2829 .op_get_currentstateid = nfsd4_get_closestateid, 2830 .op_set_currentstateid = nfsd4_set_closestateid, 2831 }, 2832 [OP_COMMIT] = { 2833 .op_func = nfsd4_commit, 2834 .op_flags = OP_MODIFIES_SOMETHING, 2835 .op_name = "OP_COMMIT", 2836 .op_rsize_bop = nfsd4_commit_rsize, 2837 }, 2838 [OP_CREATE] = { 2839 .op_func = nfsd4_create, 2840 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2841 .op_name = "OP_CREATE", 2842 .op_rsize_bop = nfsd4_create_rsize, 2843 }, 2844 [OP_DELEGRETURN] = { 2845 .op_func = nfsd4_delegreturn, 2846 .op_flags = OP_MODIFIES_SOMETHING, 2847 .op_name = "OP_DELEGRETURN", 2848 .op_rsize_bop = nfsd4_only_status_rsize, 2849 .op_get_currentstateid = nfsd4_get_delegreturnstateid, 2850 }, 2851 [OP_GETATTR] = { 2852 .op_func = nfsd4_getattr, 2853 .op_flags = ALLOWED_ON_ABSENT_FS, 2854 .op_rsize_bop = nfsd4_getattr_rsize, 2855 .op_name = "OP_GETATTR", 2856 }, 2857 [OP_GETFH] = { 2858 .op_func = nfsd4_getfh, 2859 .op_name = "OP_GETFH", 2860 .op_rsize_bop = nfsd4_getfh_rsize, 2861 }, 2862 [OP_LINK] = { 2863 .op_func = nfsd4_link, 2864 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2865 | OP_CACHEME, 2866 .op_name = "OP_LINK", 2867 .op_rsize_bop = nfsd4_link_rsize, 2868 }, 2869 [OP_LOCK] = { 2870 .op_func = nfsd4_lock, 2871 .op_flags = OP_MODIFIES_SOMETHING | 2872 OP_NONTRIVIAL_ERROR_ENCODE, 2873 .op_name = "OP_LOCK", 2874 .op_rsize_bop = nfsd4_lock_rsize, 2875 .op_set_currentstateid = nfsd4_set_lockstateid, 2876 }, 2877 [OP_LOCKT] = { 2878 .op_func = nfsd4_lockt, 2879 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE, 2880 .op_name = "OP_LOCKT", 2881 .op_rsize_bop = nfsd4_lock_rsize, 2882 }, 2883 [OP_LOCKU] = { 2884 .op_func = nfsd4_locku, 2885 .op_flags = OP_MODIFIES_SOMETHING, 2886 .op_name = "OP_LOCKU", 2887 .op_rsize_bop = nfsd4_status_stateid_rsize, 2888 .op_get_currentstateid = nfsd4_get_lockustateid, 2889 }, 2890 [OP_LOOKUP] = { 2891 .op_func = nfsd4_lookup, 2892 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2893 .op_name = "OP_LOOKUP", 2894 .op_rsize_bop = nfsd4_only_status_rsize, 2895 }, 2896 [OP_LOOKUPP] = { 2897 .op_func = nfsd4_lookupp, 2898 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2899 .op_name = "OP_LOOKUPP", 2900 .op_rsize_bop = nfsd4_only_status_rsize, 2901 }, 2902 [OP_NVERIFY] = { 2903 .op_func = nfsd4_nverify, 2904 .op_name = "OP_NVERIFY", 2905 .op_rsize_bop = nfsd4_only_status_rsize, 2906 }, 2907 [OP_OPEN] = { 2908 .op_func = nfsd4_open, 2909 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2910 .op_name = "OP_OPEN", 2911 .op_rsize_bop = nfsd4_open_rsize, 2912 .op_set_currentstateid = nfsd4_set_openstateid, 2913 }, 2914 [OP_OPEN_CONFIRM] = { 2915 .op_func = nfsd4_open_confirm, 2916 .op_flags = OP_MODIFIES_SOMETHING, 2917 .op_name = "OP_OPEN_CONFIRM", 2918 .op_rsize_bop = nfsd4_status_stateid_rsize, 2919 }, 2920 [OP_OPEN_DOWNGRADE] = { 2921 .op_func = nfsd4_open_downgrade, 2922 .op_flags = OP_MODIFIES_SOMETHING, 2923 .op_name = "OP_OPEN_DOWNGRADE", 2924 .op_rsize_bop = nfsd4_status_stateid_rsize, 2925 .op_get_currentstateid = nfsd4_get_opendowngradestateid, 2926 .op_set_currentstateid = nfsd4_set_opendowngradestateid, 2927 }, 2928 [OP_PUTFH] = { 2929 .op_func = nfsd4_putfh, 2930 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2931 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2932 .op_name = "OP_PUTFH", 2933 .op_rsize_bop = nfsd4_only_status_rsize, 2934 }, 2935 [OP_PUTPUBFH] = { 2936 .op_func = nfsd4_putrootfh, 2937 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2938 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2939 .op_name = "OP_PUTPUBFH", 2940 .op_rsize_bop = nfsd4_only_status_rsize, 2941 }, 2942 [OP_PUTROOTFH] = { 2943 .op_func = nfsd4_putrootfh, 2944 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2945 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2946 .op_name = "OP_PUTROOTFH", 2947 .op_rsize_bop = nfsd4_only_status_rsize, 2948 }, 2949 [OP_READ] = { 2950 .op_func = nfsd4_read, 2951 .op_release = nfsd4_read_release, 2952 .op_name = "OP_READ", 2953 .op_rsize_bop = nfsd4_read_rsize, 2954 .op_get_currentstateid = nfsd4_get_readstateid, 2955 }, 2956 [OP_READDIR] = { 2957 .op_func = nfsd4_readdir, 2958 .op_name = "OP_READDIR", 2959 .op_rsize_bop = nfsd4_readdir_rsize, 2960 }, 2961 [OP_READLINK] = { 2962 .op_func = nfsd4_readlink, 2963 .op_name = "OP_READLINK", 2964 .op_rsize_bop = nfsd4_readlink_rsize, 2965 }, 2966 [OP_REMOVE] = { 2967 .op_func = nfsd4_remove, 2968 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2969 .op_name = "OP_REMOVE", 2970 .op_rsize_bop = nfsd4_remove_rsize, 2971 }, 2972 [OP_RENAME] = { 2973 .op_func = nfsd4_rename, 2974 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2975 .op_name = "OP_RENAME", 2976 .op_rsize_bop = nfsd4_rename_rsize, 2977 }, 2978 [OP_RENEW] = { 2979 .op_func = nfsd4_renew, 2980 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2981 | OP_MODIFIES_SOMETHING, 2982 .op_name = "OP_RENEW", 2983 .op_rsize_bop = nfsd4_only_status_rsize, 2984 2985 }, 2986 [OP_RESTOREFH] = { 2987 .op_func = nfsd4_restorefh, 2988 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2989 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2990 .op_name = "OP_RESTOREFH", 2991 .op_rsize_bop = nfsd4_only_status_rsize, 2992 }, 2993 [OP_SAVEFH] = { 2994 .op_func = nfsd4_savefh, 2995 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2996 .op_name = "OP_SAVEFH", 2997 .op_rsize_bop = nfsd4_only_status_rsize, 2998 }, 2999 [OP_SECINFO] = { 3000 .op_func = nfsd4_secinfo, 3001 .op_release = nfsd4_secinfo_release, 3002 .op_flags = OP_HANDLES_WRONGSEC, 3003 .op_name = "OP_SECINFO", 3004 .op_rsize_bop = nfsd4_secinfo_rsize, 3005 }, 3006 [OP_SETATTR] = { 3007 .op_func = nfsd4_setattr, 3008 .op_name = "OP_SETATTR", 3009 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME 3010 | OP_NONTRIVIAL_ERROR_ENCODE, 3011 .op_rsize_bop = nfsd4_setattr_rsize, 3012 .op_get_currentstateid = nfsd4_get_setattrstateid, 3013 }, 3014 [OP_SETCLIENTID] = { 3015 .op_func = nfsd4_setclientid, 3016 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3017 | OP_MODIFIES_SOMETHING | OP_CACHEME 3018 | OP_NONTRIVIAL_ERROR_ENCODE, 3019 .op_name = "OP_SETCLIENTID", 3020 .op_rsize_bop = nfsd4_setclientid_rsize, 3021 }, 3022 [OP_SETCLIENTID_CONFIRM] = { 3023 .op_func = nfsd4_setclientid_confirm, 3024 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3025 | OP_MODIFIES_SOMETHING | OP_CACHEME, 3026 .op_name = "OP_SETCLIENTID_CONFIRM", 3027 .op_rsize_bop = nfsd4_only_status_rsize, 3028 }, 3029 [OP_VERIFY] = { 3030 .op_func = nfsd4_verify, 3031 .op_name = "OP_VERIFY", 3032 .op_rsize_bop = nfsd4_only_status_rsize, 3033 }, 3034 [OP_WRITE] = { 3035 .op_func = nfsd4_write, 3036 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3037 .op_name = "OP_WRITE", 3038 .op_rsize_bop = nfsd4_write_rsize, 3039 .op_get_currentstateid = nfsd4_get_writestateid, 3040 }, 3041 [OP_RELEASE_LOCKOWNER] = { 3042 .op_func = nfsd4_release_lockowner, 3043 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3044 | OP_MODIFIES_SOMETHING, 3045 .op_name = "OP_RELEASE_LOCKOWNER", 3046 .op_rsize_bop = nfsd4_only_status_rsize, 3047 }, 3048 3049 /* NFSv4.1 operations */ 3050 [OP_EXCHANGE_ID] = { 3051 .op_func = nfsd4_exchange_id, 3052 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3053 | OP_MODIFIES_SOMETHING, 3054 .op_name = "OP_EXCHANGE_ID", 3055 .op_rsize_bop = nfsd4_exchange_id_rsize, 3056 }, 3057 [OP_BACKCHANNEL_CTL] = { 3058 .op_func = nfsd4_backchannel_ctl, 3059 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3060 .op_name = "OP_BACKCHANNEL_CTL", 3061 .op_rsize_bop = nfsd4_only_status_rsize, 3062 }, 3063 [OP_BIND_CONN_TO_SESSION] = { 3064 .op_func = nfsd4_bind_conn_to_session, 3065 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3066 | OP_MODIFIES_SOMETHING, 3067 .op_name = "OP_BIND_CONN_TO_SESSION", 3068 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize, 3069 }, 3070 [OP_CREATE_SESSION] = { 3071 .op_func = nfsd4_create_session, 3072 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3073 | OP_MODIFIES_SOMETHING, 3074 .op_name = "OP_CREATE_SESSION", 3075 .op_rsize_bop = nfsd4_create_session_rsize, 3076 }, 3077 [OP_DESTROY_SESSION] = { 3078 .op_func = nfsd4_destroy_session, 3079 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3080 | OP_MODIFIES_SOMETHING, 3081 .op_name = "OP_DESTROY_SESSION", 3082 .op_rsize_bop = nfsd4_only_status_rsize, 3083 }, 3084 [OP_SEQUENCE] = { 3085 .op_func = nfsd4_sequence, 3086 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 3087 .op_name = "OP_SEQUENCE", 3088 .op_rsize_bop = nfsd4_sequence_rsize, 3089 }, 3090 [OP_DESTROY_CLIENTID] = { 3091 .op_func = nfsd4_destroy_clientid, 3092 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3093 | OP_MODIFIES_SOMETHING, 3094 .op_name = "OP_DESTROY_CLIENTID", 3095 .op_rsize_bop = nfsd4_only_status_rsize, 3096 }, 3097 [OP_RECLAIM_COMPLETE] = { 3098 .op_func = nfsd4_reclaim_complete, 3099 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3100 .op_name = "OP_RECLAIM_COMPLETE", 3101 .op_rsize_bop = nfsd4_only_status_rsize, 3102 }, 3103 [OP_SECINFO_NO_NAME] = { 3104 .op_func = nfsd4_secinfo_no_name, 3105 .op_release = nfsd4_secinfo_no_name_release, 3106 .op_flags = OP_HANDLES_WRONGSEC, 3107 .op_name = "OP_SECINFO_NO_NAME", 3108 .op_rsize_bop = nfsd4_secinfo_rsize, 3109 }, 3110 [OP_TEST_STATEID] = { 3111 .op_func = nfsd4_test_stateid, 3112 .op_flags = ALLOWED_WITHOUT_FH, 3113 .op_name = "OP_TEST_STATEID", 3114 .op_rsize_bop = nfsd4_test_stateid_rsize, 3115 }, 3116 [OP_FREE_STATEID] = { 3117 .op_func = nfsd4_free_stateid, 3118 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3119 .op_name = "OP_FREE_STATEID", 3120 .op_get_currentstateid = nfsd4_get_freestateid, 3121 .op_rsize_bop = nfsd4_only_status_rsize, 3122 }, 3123 #ifdef CONFIG_NFSD_PNFS 3124 [OP_GETDEVICEINFO] = { 3125 .op_func = nfsd4_getdeviceinfo, 3126 .op_release = nfsd4_getdeviceinfo_release, 3127 .op_flags = ALLOWED_WITHOUT_FH, 3128 .op_name = "OP_GETDEVICEINFO", 3129 .op_rsize_bop = nfsd4_getdeviceinfo_rsize, 3130 }, 3131 [OP_LAYOUTGET] = { 3132 .op_func = nfsd4_layoutget, 3133 .op_release = nfsd4_layoutget_release, 3134 .op_flags = OP_MODIFIES_SOMETHING, 3135 .op_name = "OP_LAYOUTGET", 3136 .op_rsize_bop = nfsd4_layoutget_rsize, 3137 }, 3138 [OP_LAYOUTCOMMIT] = { 3139 .op_func = nfsd4_layoutcommit, 3140 .op_flags = OP_MODIFIES_SOMETHING, 3141 .op_name = "OP_LAYOUTCOMMIT", 3142 .op_rsize_bop = nfsd4_layoutcommit_rsize, 3143 }, 3144 [OP_LAYOUTRETURN] = { 3145 .op_func = nfsd4_layoutreturn, 3146 .op_flags = OP_MODIFIES_SOMETHING, 3147 .op_name = "OP_LAYOUTRETURN", 3148 .op_rsize_bop = nfsd4_layoutreturn_rsize, 3149 }, 3150 #endif /* CONFIG_NFSD_PNFS */ 3151 3152 /* NFSv4.2 operations */ 3153 [OP_ALLOCATE] = { 3154 .op_func = nfsd4_allocate, 3155 .op_flags = OP_MODIFIES_SOMETHING, 3156 .op_name = "OP_ALLOCATE", 3157 .op_rsize_bop = nfsd4_only_status_rsize, 3158 }, 3159 [OP_DEALLOCATE] = { 3160 .op_func = nfsd4_deallocate, 3161 .op_flags = OP_MODIFIES_SOMETHING, 3162 .op_name = "OP_DEALLOCATE", 3163 .op_rsize_bop = nfsd4_only_status_rsize, 3164 }, 3165 [OP_CLONE] = { 3166 .op_func = nfsd4_clone, 3167 .op_flags = OP_MODIFIES_SOMETHING, 3168 .op_name = "OP_CLONE", 3169 .op_rsize_bop = nfsd4_only_status_rsize, 3170 }, 3171 [OP_COPY] = { 3172 .op_func = nfsd4_copy, 3173 .op_flags = OP_MODIFIES_SOMETHING, 3174 .op_name = "OP_COPY", 3175 .op_rsize_bop = nfsd4_copy_rsize, 3176 }, 3177 [OP_READ_PLUS] = { 3178 .op_func = nfsd4_read, 3179 .op_release = nfsd4_read_release, 3180 .op_name = "OP_READ_PLUS", 3181 .op_rsize_bop = nfsd4_read_plus_rsize, 3182 .op_get_currentstateid = nfsd4_get_readstateid, 3183 }, 3184 [OP_SEEK] = { 3185 .op_func = nfsd4_seek, 3186 .op_name = "OP_SEEK", 3187 .op_rsize_bop = nfsd4_seek_rsize, 3188 }, 3189 [OP_OFFLOAD_STATUS] = { 3190 .op_func = nfsd4_offload_status, 3191 .op_name = "OP_OFFLOAD_STATUS", 3192 .op_rsize_bop = nfsd4_offload_status_rsize, 3193 }, 3194 [OP_OFFLOAD_CANCEL] = { 3195 .op_func = nfsd4_offload_cancel, 3196 .op_flags = OP_MODIFIES_SOMETHING, 3197 .op_name = "OP_OFFLOAD_CANCEL", 3198 .op_rsize_bop = nfsd4_only_status_rsize, 3199 }, 3200 [OP_COPY_NOTIFY] = { 3201 .op_func = nfsd4_copy_notify, 3202 .op_flags = OP_MODIFIES_SOMETHING, 3203 .op_name = "OP_COPY_NOTIFY", 3204 .op_rsize_bop = nfsd4_copy_notify_rsize, 3205 }, 3206 [OP_GETXATTR] = { 3207 .op_func = nfsd4_getxattr, 3208 .op_name = "OP_GETXATTR", 3209 .op_rsize_bop = nfsd4_getxattr_rsize, 3210 }, 3211 [OP_SETXATTR] = { 3212 .op_func = nfsd4_setxattr, 3213 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3214 .op_name = "OP_SETXATTR", 3215 .op_rsize_bop = nfsd4_setxattr_rsize, 3216 }, 3217 [OP_LISTXATTRS] = { 3218 .op_func = nfsd4_listxattrs, 3219 .op_name = "OP_LISTXATTRS", 3220 .op_rsize_bop = nfsd4_listxattrs_rsize, 3221 }, 3222 [OP_REMOVEXATTR] = { 3223 .op_func = nfsd4_removexattr, 3224 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3225 .op_name = "OP_REMOVEXATTR", 3226 .op_rsize_bop = nfsd4_removexattr_rsize, 3227 }, 3228 }; 3229 3230 /** 3231 * nfsd4_spo_must_allow - Determine if the compound op contains an 3232 * operation that is allowed to be sent with machine credentials 3233 * 3234 * @rqstp: a pointer to the struct svc_rqst 3235 * 3236 * Checks to see if the compound contains a spo_must_allow op 3237 * and confirms that it was sent with the proper machine creds. 3238 */ 3239 3240 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 3241 { 3242 struct nfsd4_compoundres *resp = rqstp->rq_resp; 3243 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 3244 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 3245 struct nfsd4_compound_state *cstate = &resp->cstate; 3246 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 3247 u32 opiter; 3248 3249 if (!cstate->minorversion) 3250 return false; 3251 3252 if (cstate->spo_must_allowed) 3253 return true; 3254 3255 opiter = resp->opcnt; 3256 while (opiter < argp->opcnt) { 3257 this = &argp->ops[opiter++]; 3258 if (test_bit(this->opnum, allow->u.longs) && 3259 cstate->clp->cl_mach_cred && 3260 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 3261 cstate->spo_must_allowed = true; 3262 return true; 3263 } 3264 } 3265 cstate->spo_must_allowed = false; 3266 return false; 3267 } 3268 3269 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 3270 { 3271 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp) 3272 return op_encode_hdr_size * sizeof(__be32); 3273 3274 BUG_ON(OPDESC(op)->op_rsize_bop == NULL); 3275 return OPDESC(op)->op_rsize_bop(rqstp, op); 3276 } 3277 3278 void warn_on_nonidempotent_op(struct nfsd4_op *op) 3279 { 3280 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 3281 pr_err("unable to encode reply to nonidempotent op %u (%s)\n", 3282 op->opnum, nfsd4_op_name(op->opnum)); 3283 WARN_ON_ONCE(1); 3284 } 3285 } 3286 3287 static const char *nfsd4_op_name(unsigned opnum) 3288 { 3289 if (opnum < ARRAY_SIZE(nfsd4_ops)) 3290 return nfsd4_ops[opnum].op_name; 3291 return "unknown_operation"; 3292 } 3293 3294 static const struct svc_procedure nfsd_procedures4[2] = { 3295 [NFSPROC4_NULL] = { 3296 .pc_func = nfsd4_proc_null, 3297 .pc_decode = nfssvc_decode_voidarg, 3298 .pc_encode = nfssvc_encode_voidres, 3299 .pc_argsize = sizeof(struct nfsd_voidargs), 3300 .pc_ressize = sizeof(struct nfsd_voidres), 3301 .pc_cachetype = RC_NOCACHE, 3302 .pc_xdrressize = 1, 3303 }, 3304 [NFSPROC4_COMPOUND] = { 3305 .pc_func = nfsd4_proc_compound, 3306 .pc_decode = nfs4svc_decode_compoundargs, 3307 .pc_encode = nfs4svc_encode_compoundres, 3308 .pc_argsize = sizeof(struct nfsd4_compoundargs), 3309 .pc_ressize = sizeof(struct nfsd4_compoundres), 3310 .pc_release = nfsd4_release_compoundargs, 3311 .pc_cachetype = RC_NOCACHE, 3312 .pc_xdrressize = NFSD_BUFSIZE/4, 3313 }, 3314 }; 3315 3316 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)]; 3317 const struct svc_version nfsd_version4 = { 3318 .vs_vers = 4, 3319 .vs_nproc = 2, 3320 .vs_proc = nfsd_procedures4, 3321 .vs_count = nfsd_count3, 3322 .vs_dispatch = nfsd_dispatch, 3323 .vs_xdrsize = NFS4_SVC_XDRSIZE, 3324 .vs_rpcb_optnl = true, 3325 .vs_need_cong_ctrl = true, 3326 }; 3327 3328 /* 3329 * Local variables: 3330 * c-basic-offset: 8 3331 * End: 3332 */ 3333