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.data, 261 open->op_fname.len, &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.data, open->op_fname.len, *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_fname.len, open->op_fname.data, 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_pagelist, 1027 &write->wr_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 int 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 return 0; 1449 } 1450 1451 static void cleanup_async_copy(struct nfsd4_copy *copy) 1452 { 1453 nfs4_free_copy_state(copy); 1454 nfsd_file_put(copy->nf_dst); 1455 if (copy->cp_intra) 1456 nfsd_file_put(copy->nf_src); 1457 spin_lock(©->cp_clp->async_lock); 1458 list_del(©->copies); 1459 spin_unlock(©->cp_clp->async_lock); 1460 nfs4_put_copy(copy); 1461 } 1462 1463 static int nfsd4_do_async_copy(void *data) 1464 { 1465 struct nfsd4_copy *copy = (struct nfsd4_copy *)data; 1466 struct nfsd4_copy *cb_copy; 1467 1468 if (!copy->cp_intra) { /* Inter server SSC */ 1469 copy->nf_src = kzalloc(sizeof(struct nfsd_file), GFP_KERNEL); 1470 if (!copy->nf_src) { 1471 copy->nfserr = nfserr_serverfault; 1472 nfsd4_interssc_disconnect(copy->ss_mnt); 1473 goto do_callback; 1474 } 1475 copy->nf_src->nf_file = nfs42_ssc_open(copy->ss_mnt, ©->c_fh, 1476 ©->stateid); 1477 if (IS_ERR(copy->nf_src->nf_file)) { 1478 copy->nfserr = nfserr_offload_denied; 1479 nfsd4_interssc_disconnect(copy->ss_mnt); 1480 goto do_callback; 1481 } 1482 } 1483 1484 copy->nfserr = nfsd4_do_copy(copy, 0); 1485 do_callback: 1486 cb_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1487 if (!cb_copy) 1488 goto out; 1489 refcount_set(&cb_copy->refcount, 1); 1490 memcpy(&cb_copy->cp_res, ©->cp_res, sizeof(copy->cp_res)); 1491 cb_copy->cp_clp = copy->cp_clp; 1492 cb_copy->nfserr = copy->nfserr; 1493 memcpy(&cb_copy->fh, ©->fh, sizeof(copy->fh)); 1494 nfsd4_init_cb(&cb_copy->cp_cb, cb_copy->cp_clp, 1495 &nfsd4_cb_offload_ops, NFSPROC4_CLNT_CB_OFFLOAD); 1496 nfsd4_run_cb(&cb_copy->cp_cb); 1497 out: 1498 if (!copy->cp_intra) 1499 kfree(copy->nf_src); 1500 cleanup_async_copy(copy); 1501 return 0; 1502 } 1503 1504 static __be32 1505 nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1506 union nfsd4_op_u *u) 1507 { 1508 struct nfsd4_copy *copy = &u->copy; 1509 __be32 status; 1510 struct nfsd4_copy *async_copy = NULL; 1511 1512 if (!copy->cp_intra) { /* Inter server SSC */ 1513 if (!inter_copy_offload_enable || copy->cp_synchronous) { 1514 status = nfserr_notsupp; 1515 goto out; 1516 } 1517 status = nfsd4_setup_inter_ssc(rqstp, cstate, copy, 1518 ©->ss_mnt); 1519 if (status) 1520 return nfserr_offload_denied; 1521 } else { 1522 status = nfsd4_setup_intra_ssc(rqstp, cstate, copy); 1523 if (status) 1524 return status; 1525 } 1526 1527 copy->cp_clp = cstate->clp; 1528 memcpy(©->fh, &cstate->current_fh.fh_handle, 1529 sizeof(struct knfsd_fh)); 1530 if (!copy->cp_synchronous) { 1531 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1532 1533 status = nfserrno(-ENOMEM); 1534 async_copy = kzalloc(sizeof(struct nfsd4_copy), GFP_KERNEL); 1535 if (!async_copy) 1536 goto out_err; 1537 if (!nfs4_init_copy_state(nn, copy)) 1538 goto out_err; 1539 refcount_set(&async_copy->refcount, 1); 1540 memcpy(©->cp_res.cb_stateid, ©->cp_stateid, 1541 sizeof(copy->cp_stateid)); 1542 status = dup_copy_fields(copy, async_copy); 1543 if (status) 1544 goto out_err; 1545 async_copy->copy_task = kthread_create(nfsd4_do_async_copy, 1546 async_copy, "%s", "copy thread"); 1547 if (IS_ERR(async_copy->copy_task)) 1548 goto out_err; 1549 spin_lock(&async_copy->cp_clp->async_lock); 1550 list_add(&async_copy->copies, 1551 &async_copy->cp_clp->async_copies); 1552 spin_unlock(&async_copy->cp_clp->async_lock); 1553 wake_up_process(async_copy->copy_task); 1554 status = nfs_ok; 1555 } else { 1556 status = nfsd4_do_copy(copy, 1); 1557 } 1558 out: 1559 return status; 1560 out_err: 1561 if (async_copy) 1562 cleanup_async_copy(async_copy); 1563 status = nfserrno(-ENOMEM); 1564 if (!copy->cp_intra) 1565 nfsd4_interssc_disconnect(copy->ss_mnt); 1566 goto out; 1567 } 1568 1569 struct nfsd4_copy * 1570 find_async_copy(struct nfs4_client *clp, stateid_t *stateid) 1571 { 1572 struct nfsd4_copy *copy; 1573 1574 spin_lock(&clp->async_lock); 1575 list_for_each_entry(copy, &clp->async_copies, copies) { 1576 if (memcmp(©->cp_stateid.stid, stateid, NFS4_STATEID_SIZE)) 1577 continue; 1578 refcount_inc(©->refcount); 1579 spin_unlock(&clp->async_lock); 1580 return copy; 1581 } 1582 spin_unlock(&clp->async_lock); 1583 return NULL; 1584 } 1585 1586 static __be32 1587 nfsd4_offload_cancel(struct svc_rqst *rqstp, 1588 struct nfsd4_compound_state *cstate, 1589 union nfsd4_op_u *u) 1590 { 1591 struct nfsd4_offload_status *os = &u->offload_status; 1592 struct nfsd4_copy *copy; 1593 struct nfs4_client *clp = cstate->clp; 1594 1595 copy = find_async_copy(clp, &os->stateid); 1596 if (!copy) { 1597 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1598 1599 return manage_cpntf_state(nn, &os->stateid, clp, NULL); 1600 } else 1601 nfsd4_stop_copy(copy); 1602 1603 return nfs_ok; 1604 } 1605 1606 static __be32 1607 nfsd4_copy_notify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1608 union nfsd4_op_u *u) 1609 { 1610 struct nfsd4_copy_notify *cn = &u->copy_notify; 1611 __be32 status; 1612 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1613 struct nfs4_stid *stid; 1614 struct nfs4_cpntf_state *cps; 1615 struct nfs4_client *clp = cstate->clp; 1616 1617 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1618 &cn->cpn_src_stateid, RD_STATE, NULL, 1619 &stid); 1620 if (status) 1621 return status; 1622 1623 cn->cpn_sec = nn->nfsd4_lease; 1624 cn->cpn_nsec = 0; 1625 1626 status = nfserrno(-ENOMEM); 1627 cps = nfs4_alloc_init_cpntf_state(nn, stid); 1628 if (!cps) 1629 goto out; 1630 memcpy(&cn->cpn_cnr_stateid, &cps->cp_stateid.stid, sizeof(stateid_t)); 1631 memcpy(&cps->cp_p_stateid, &stid->sc_stateid, sizeof(stateid_t)); 1632 memcpy(&cps->cp_p_clid, &clp->cl_clientid, sizeof(clientid_t)); 1633 1634 /* For now, only return one server address in cpn_src, the 1635 * address used by the client to connect to this server. 1636 */ 1637 cn->cpn_src.nl4_type = NL4_NETADDR; 1638 status = nfsd4_set_netaddr((struct sockaddr *)&rqstp->rq_daddr, 1639 &cn->cpn_src.u.nl4_addr); 1640 WARN_ON_ONCE(status); 1641 if (status) { 1642 nfs4_put_cpntf_state(nn, cps); 1643 goto out; 1644 } 1645 out: 1646 nfs4_put_stid(stid); 1647 return status; 1648 } 1649 1650 static __be32 1651 nfsd4_fallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1652 struct nfsd4_fallocate *fallocate, int flags) 1653 { 1654 __be32 status; 1655 struct nfsd_file *nf; 1656 1657 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1658 &fallocate->falloc_stateid, 1659 WR_STATE, &nf, NULL); 1660 if (status != nfs_ok) { 1661 dprintk("NFSD: nfsd4_fallocate: couldn't process stateid!\n"); 1662 return status; 1663 } 1664 1665 status = nfsd4_vfs_fallocate(rqstp, &cstate->current_fh, nf->nf_file, 1666 fallocate->falloc_offset, 1667 fallocate->falloc_length, 1668 flags); 1669 nfsd_file_put(nf); 1670 return status; 1671 } 1672 static __be32 1673 nfsd4_offload_status(struct svc_rqst *rqstp, 1674 struct nfsd4_compound_state *cstate, 1675 union nfsd4_op_u *u) 1676 { 1677 struct nfsd4_offload_status *os = &u->offload_status; 1678 __be32 status = 0; 1679 struct nfsd4_copy *copy; 1680 struct nfs4_client *clp = cstate->clp; 1681 1682 copy = find_async_copy(clp, &os->stateid); 1683 if (copy) { 1684 os->count = copy->cp_res.wr_bytes_written; 1685 nfs4_put_copy(copy); 1686 } else 1687 status = nfserr_bad_stateid; 1688 1689 return status; 1690 } 1691 1692 static __be32 1693 nfsd4_allocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1694 union nfsd4_op_u *u) 1695 { 1696 return nfsd4_fallocate(rqstp, cstate, &u->allocate, 0); 1697 } 1698 1699 static __be32 1700 nfsd4_deallocate(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1701 union nfsd4_op_u *u) 1702 { 1703 return nfsd4_fallocate(rqstp, cstate, &u->deallocate, 1704 FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE); 1705 } 1706 1707 static __be32 1708 nfsd4_seek(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1709 union nfsd4_op_u *u) 1710 { 1711 struct nfsd4_seek *seek = &u->seek; 1712 int whence; 1713 __be32 status; 1714 struct nfsd_file *nf; 1715 1716 status = nfs4_preprocess_stateid_op(rqstp, cstate, &cstate->current_fh, 1717 &seek->seek_stateid, 1718 RD_STATE, &nf, NULL); 1719 if (status) { 1720 dprintk("NFSD: nfsd4_seek: couldn't process stateid!\n"); 1721 return status; 1722 } 1723 1724 switch (seek->seek_whence) { 1725 case NFS4_CONTENT_DATA: 1726 whence = SEEK_DATA; 1727 break; 1728 case NFS4_CONTENT_HOLE: 1729 whence = SEEK_HOLE; 1730 break; 1731 default: 1732 status = nfserr_union_notsupp; 1733 goto out; 1734 } 1735 1736 /* 1737 * Note: This call does change file->f_pos, but nothing in NFSD 1738 * should ever file->f_pos. 1739 */ 1740 seek->seek_pos = vfs_llseek(nf->nf_file, seek->seek_offset, whence); 1741 if (seek->seek_pos < 0) 1742 status = nfserrno(seek->seek_pos); 1743 else if (seek->seek_pos >= i_size_read(file_inode(nf->nf_file))) 1744 seek->seek_eof = true; 1745 1746 out: 1747 nfsd_file_put(nf); 1748 return status; 1749 } 1750 1751 /* This routine never returns NFS_OK! If there are no other errors, it 1752 * will return NFSERR_SAME or NFSERR_NOT_SAME depending on whether the 1753 * attributes matched. VERIFY is implemented by mapping NFSERR_SAME 1754 * to NFS_OK after the call; NVERIFY by mapping NFSERR_NOT_SAME to NFS_OK. 1755 */ 1756 static __be32 1757 _nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1758 struct nfsd4_verify *verify) 1759 { 1760 __be32 *buf, *p; 1761 int count; 1762 __be32 status; 1763 1764 status = fh_verify(rqstp, &cstate->current_fh, 0, NFSD_MAY_NOP); 1765 if (status) 1766 return status; 1767 1768 status = check_attr_support(rqstp, cstate, verify->ve_bmval, NULL); 1769 if (status) 1770 return status; 1771 1772 if ((verify->ve_bmval[0] & FATTR4_WORD0_RDATTR_ERROR) 1773 || (verify->ve_bmval[1] & NFSD_WRITEONLY_ATTRS_WORD1)) 1774 return nfserr_inval; 1775 if (verify->ve_attrlen & 3) 1776 return nfserr_inval; 1777 1778 /* count in words: 1779 * bitmap_len(1) + bitmap(2) + attr_len(1) = 4 1780 */ 1781 count = 4 + (verify->ve_attrlen >> 2); 1782 buf = kmalloc(count << 2, GFP_KERNEL); 1783 if (!buf) 1784 return nfserr_jukebox; 1785 1786 p = buf; 1787 status = nfsd4_encode_fattr_to_buf(&p, count, &cstate->current_fh, 1788 cstate->current_fh.fh_export, 1789 cstate->current_fh.fh_dentry, 1790 verify->ve_bmval, 1791 rqstp, 0); 1792 /* 1793 * If nfsd4_encode_fattr() ran out of space, assume that's because 1794 * the attributes are longer (hence different) than those given: 1795 */ 1796 if (status == nfserr_resource) 1797 status = nfserr_not_same; 1798 if (status) 1799 goto out_kfree; 1800 1801 /* skip bitmap */ 1802 p = buf + 1 + ntohl(buf[0]); 1803 status = nfserr_not_same; 1804 if (ntohl(*p++) != verify->ve_attrlen) 1805 goto out_kfree; 1806 if (!memcmp(p, verify->ve_attrval, verify->ve_attrlen)) 1807 status = nfserr_same; 1808 1809 out_kfree: 1810 kfree(buf); 1811 return status; 1812 } 1813 1814 static __be32 1815 nfsd4_nverify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1816 union nfsd4_op_u *u) 1817 { 1818 __be32 status; 1819 1820 status = _nfsd4_verify(rqstp, cstate, &u->verify); 1821 return status == nfserr_not_same ? nfs_ok : status; 1822 } 1823 1824 static __be32 1825 nfsd4_verify(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1826 union nfsd4_op_u *u) 1827 { 1828 __be32 status; 1829 1830 status = _nfsd4_verify(rqstp, cstate, &u->nverify); 1831 return status == nfserr_same ? nfs_ok : status; 1832 } 1833 1834 #ifdef CONFIG_NFSD_PNFS 1835 static const struct nfsd4_layout_ops * 1836 nfsd4_layout_verify(struct svc_export *exp, unsigned int layout_type) 1837 { 1838 if (!exp->ex_layout_types) { 1839 dprintk("%s: export does not support pNFS\n", __func__); 1840 return NULL; 1841 } 1842 1843 if (layout_type >= LAYOUT_TYPE_MAX || 1844 !(exp->ex_layout_types & (1 << layout_type))) { 1845 dprintk("%s: layout type %d not supported\n", 1846 __func__, layout_type); 1847 return NULL; 1848 } 1849 1850 return nfsd4_layout_ops[layout_type]; 1851 } 1852 1853 static __be32 1854 nfsd4_getdeviceinfo(struct svc_rqst *rqstp, 1855 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1856 { 1857 struct nfsd4_getdeviceinfo *gdp = &u->getdeviceinfo; 1858 const struct nfsd4_layout_ops *ops; 1859 struct nfsd4_deviceid_map *map; 1860 struct svc_export *exp; 1861 __be32 nfserr; 1862 1863 dprintk("%s: layout_type %u dev_id [0x%llx:0x%x] maxcnt %u\n", 1864 __func__, 1865 gdp->gd_layout_type, 1866 gdp->gd_devid.fsid_idx, gdp->gd_devid.generation, 1867 gdp->gd_maxcount); 1868 1869 map = nfsd4_find_devid_map(gdp->gd_devid.fsid_idx); 1870 if (!map) { 1871 dprintk("%s: couldn't find device ID to export mapping!\n", 1872 __func__); 1873 return nfserr_noent; 1874 } 1875 1876 exp = rqst_exp_find(rqstp, map->fsid_type, map->fsid); 1877 if (IS_ERR(exp)) { 1878 dprintk("%s: could not find device id\n", __func__); 1879 return nfserr_noent; 1880 } 1881 1882 nfserr = nfserr_layoutunavailable; 1883 ops = nfsd4_layout_verify(exp, gdp->gd_layout_type); 1884 if (!ops) 1885 goto out; 1886 1887 nfserr = nfs_ok; 1888 if (gdp->gd_maxcount != 0) { 1889 nfserr = ops->proc_getdeviceinfo(exp->ex_path.mnt->mnt_sb, 1890 rqstp, cstate->session->se_client, gdp); 1891 } 1892 1893 gdp->gd_notify_types &= ops->notify_types; 1894 out: 1895 exp_put(exp); 1896 return nfserr; 1897 } 1898 1899 static void 1900 nfsd4_getdeviceinfo_release(union nfsd4_op_u *u) 1901 { 1902 kfree(u->getdeviceinfo.gd_device); 1903 } 1904 1905 static __be32 1906 nfsd4_layoutget(struct svc_rqst *rqstp, 1907 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1908 { 1909 struct nfsd4_layoutget *lgp = &u->layoutget; 1910 struct svc_fh *current_fh = &cstate->current_fh; 1911 const struct nfsd4_layout_ops *ops; 1912 struct nfs4_layout_stateid *ls; 1913 __be32 nfserr; 1914 int accmode = NFSD_MAY_READ_IF_EXEC; 1915 1916 switch (lgp->lg_seg.iomode) { 1917 case IOMODE_READ: 1918 accmode |= NFSD_MAY_READ; 1919 break; 1920 case IOMODE_RW: 1921 accmode |= NFSD_MAY_READ | NFSD_MAY_WRITE; 1922 break; 1923 default: 1924 dprintk("%s: invalid iomode %d\n", 1925 __func__, lgp->lg_seg.iomode); 1926 nfserr = nfserr_badiomode; 1927 goto out; 1928 } 1929 1930 nfserr = fh_verify(rqstp, current_fh, 0, accmode); 1931 if (nfserr) 1932 goto out; 1933 1934 nfserr = nfserr_layoutunavailable; 1935 ops = nfsd4_layout_verify(current_fh->fh_export, lgp->lg_layout_type); 1936 if (!ops) 1937 goto out; 1938 1939 /* 1940 * Verify minlength and range as per RFC5661: 1941 * o If loga_length is less than loga_minlength, 1942 * the metadata server MUST return NFS4ERR_INVAL. 1943 * o If the sum of loga_offset and loga_minlength exceeds 1944 * NFS4_UINT64_MAX, and loga_minlength is not 1945 * NFS4_UINT64_MAX, the error NFS4ERR_INVAL MUST result. 1946 * o If the sum of loga_offset and loga_length exceeds 1947 * NFS4_UINT64_MAX, and loga_length is not NFS4_UINT64_MAX, 1948 * the error NFS4ERR_INVAL MUST result. 1949 */ 1950 nfserr = nfserr_inval; 1951 if (lgp->lg_seg.length < lgp->lg_minlength || 1952 (lgp->lg_minlength != NFS4_MAX_UINT64 && 1953 lgp->lg_minlength > NFS4_MAX_UINT64 - lgp->lg_seg.offset) || 1954 (lgp->lg_seg.length != NFS4_MAX_UINT64 && 1955 lgp->lg_seg.length > NFS4_MAX_UINT64 - lgp->lg_seg.offset)) 1956 goto out; 1957 if (lgp->lg_seg.length == 0) 1958 goto out; 1959 1960 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid, 1961 true, lgp->lg_layout_type, &ls); 1962 if (nfserr) { 1963 trace_nfsd_layout_get_lookup_fail(&lgp->lg_sid); 1964 goto out; 1965 } 1966 1967 nfserr = nfserr_recallconflict; 1968 if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls)) 1969 goto out_put_stid; 1970 1971 nfserr = ops->proc_layoutget(d_inode(current_fh->fh_dentry), 1972 current_fh, lgp); 1973 if (nfserr) 1974 goto out_put_stid; 1975 1976 nfserr = nfsd4_insert_layout(lgp, ls); 1977 1978 out_put_stid: 1979 mutex_unlock(&ls->ls_mutex); 1980 nfs4_put_stid(&ls->ls_stid); 1981 out: 1982 return nfserr; 1983 } 1984 1985 static void 1986 nfsd4_layoutget_release(union nfsd4_op_u *u) 1987 { 1988 kfree(u->layoutget.lg_content); 1989 } 1990 1991 static __be32 1992 nfsd4_layoutcommit(struct svc_rqst *rqstp, 1993 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 1994 { 1995 struct nfsd4_layoutcommit *lcp = &u->layoutcommit; 1996 const struct nfsd4_layout_seg *seg = &lcp->lc_seg; 1997 struct svc_fh *current_fh = &cstate->current_fh; 1998 const struct nfsd4_layout_ops *ops; 1999 loff_t new_size = lcp->lc_last_wr + 1; 2000 struct inode *inode; 2001 struct nfs4_layout_stateid *ls; 2002 __be32 nfserr; 2003 2004 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_WRITE); 2005 if (nfserr) 2006 goto out; 2007 2008 nfserr = nfserr_layoutunavailable; 2009 ops = nfsd4_layout_verify(current_fh->fh_export, lcp->lc_layout_type); 2010 if (!ops) 2011 goto out; 2012 inode = d_inode(current_fh->fh_dentry); 2013 2014 nfserr = nfserr_inval; 2015 if (new_size <= seg->offset) { 2016 dprintk("pnfsd: last write before layout segment\n"); 2017 goto out; 2018 } 2019 if (new_size > seg->offset + seg->length) { 2020 dprintk("pnfsd: last write beyond layout segment\n"); 2021 goto out; 2022 } 2023 if (!lcp->lc_newoffset && new_size > i_size_read(inode)) { 2024 dprintk("pnfsd: layoutcommit beyond EOF\n"); 2025 goto out; 2026 } 2027 2028 nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lcp->lc_sid, 2029 false, lcp->lc_layout_type, 2030 &ls); 2031 if (nfserr) { 2032 trace_nfsd_layout_commit_lookup_fail(&lcp->lc_sid); 2033 /* fixup error code as per RFC5661 */ 2034 if (nfserr == nfserr_bad_stateid) 2035 nfserr = nfserr_badlayout; 2036 goto out; 2037 } 2038 2039 /* LAYOUTCOMMIT does not require any serialization */ 2040 mutex_unlock(&ls->ls_mutex); 2041 2042 if (new_size > i_size_read(inode)) { 2043 lcp->lc_size_chg = 1; 2044 lcp->lc_newsize = new_size; 2045 } else { 2046 lcp->lc_size_chg = 0; 2047 } 2048 2049 nfserr = ops->proc_layoutcommit(inode, lcp); 2050 nfs4_put_stid(&ls->ls_stid); 2051 out: 2052 return nfserr; 2053 } 2054 2055 static __be32 2056 nfsd4_layoutreturn(struct svc_rqst *rqstp, 2057 struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 2058 { 2059 struct nfsd4_layoutreturn *lrp = &u->layoutreturn; 2060 struct svc_fh *current_fh = &cstate->current_fh; 2061 __be32 nfserr; 2062 2063 nfserr = fh_verify(rqstp, current_fh, 0, NFSD_MAY_NOP); 2064 if (nfserr) 2065 goto out; 2066 2067 nfserr = nfserr_layoutunavailable; 2068 if (!nfsd4_layout_verify(current_fh->fh_export, lrp->lr_layout_type)) 2069 goto out; 2070 2071 switch (lrp->lr_seg.iomode) { 2072 case IOMODE_READ: 2073 case IOMODE_RW: 2074 case IOMODE_ANY: 2075 break; 2076 default: 2077 dprintk("%s: invalid iomode %d\n", __func__, 2078 lrp->lr_seg.iomode); 2079 nfserr = nfserr_inval; 2080 goto out; 2081 } 2082 2083 switch (lrp->lr_return_type) { 2084 case RETURN_FILE: 2085 nfserr = nfsd4_return_file_layouts(rqstp, cstate, lrp); 2086 break; 2087 case RETURN_FSID: 2088 case RETURN_ALL: 2089 nfserr = nfsd4_return_client_layouts(rqstp, cstate, lrp); 2090 break; 2091 default: 2092 dprintk("%s: invalid return_type %d\n", __func__, 2093 lrp->lr_return_type); 2094 nfserr = nfserr_inval; 2095 break; 2096 } 2097 out: 2098 return nfserr; 2099 } 2100 #endif /* CONFIG_NFSD_PNFS */ 2101 2102 static __be32 2103 nfsd4_getxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2104 union nfsd4_op_u *u) 2105 { 2106 struct nfsd4_getxattr *getxattr = &u->getxattr; 2107 2108 return nfsd_getxattr(rqstp, &cstate->current_fh, 2109 getxattr->getxa_name, &getxattr->getxa_buf, 2110 &getxattr->getxa_len); 2111 } 2112 2113 static __be32 2114 nfsd4_setxattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2115 union nfsd4_op_u *u) 2116 { 2117 struct nfsd4_setxattr *setxattr = &u->setxattr; 2118 __be32 ret; 2119 2120 if (opens_in_grace(SVC_NET(rqstp))) 2121 return nfserr_grace; 2122 2123 ret = nfsd_setxattr(rqstp, &cstate->current_fh, setxattr->setxa_name, 2124 setxattr->setxa_buf, setxattr->setxa_len, 2125 setxattr->setxa_flags); 2126 2127 if (!ret) 2128 set_change_info(&setxattr->setxa_cinfo, &cstate->current_fh); 2129 2130 return ret; 2131 } 2132 2133 static __be32 2134 nfsd4_listxattrs(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2135 union nfsd4_op_u *u) 2136 { 2137 /* 2138 * Get the entire list, then copy out only the user attributes 2139 * in the encode function. 2140 */ 2141 return nfsd_listxattr(rqstp, &cstate->current_fh, 2142 &u->listxattrs.lsxa_buf, &u->listxattrs.lsxa_len); 2143 } 2144 2145 static __be32 2146 nfsd4_removexattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2147 union nfsd4_op_u *u) 2148 { 2149 struct nfsd4_removexattr *removexattr = &u->removexattr; 2150 __be32 ret; 2151 2152 if (opens_in_grace(SVC_NET(rqstp))) 2153 return nfserr_grace; 2154 2155 ret = nfsd_removexattr(rqstp, &cstate->current_fh, 2156 removexattr->rmxa_name); 2157 2158 if (!ret) 2159 set_change_info(&removexattr->rmxa_cinfo, &cstate->current_fh); 2160 2161 return ret; 2162 } 2163 2164 /* 2165 * NULL call. 2166 */ 2167 static __be32 2168 nfsd4_proc_null(struct svc_rqst *rqstp) 2169 { 2170 return rpc_success; 2171 } 2172 2173 static inline void nfsd4_increment_op_stats(u32 opnum) 2174 { 2175 if (opnum >= FIRST_NFS4_OP && opnum <= LAST_NFS4_OP) 2176 nfsdstats.nfs4_opcount[opnum]++; 2177 } 2178 2179 static const struct nfsd4_operation nfsd4_ops[]; 2180 2181 static const char *nfsd4_op_name(unsigned opnum); 2182 2183 /* 2184 * Enforce NFSv4.1 COMPOUND ordering rules: 2185 * 2186 * Also note, enforced elsewhere: 2187 * - SEQUENCE other than as first op results in 2188 * NFS4ERR_SEQUENCE_POS. (Enforced in nfsd4_sequence().) 2189 * - BIND_CONN_TO_SESSION must be the only op in its compound. 2190 * (Enforced in nfsd4_bind_conn_to_session().) 2191 * - DESTROY_SESSION must be the final operation in a compound, if 2192 * sessionid's in SEQUENCE and DESTROY_SESSION are the same. 2193 * (Enforced in nfsd4_destroy_session().) 2194 */ 2195 static __be32 nfs41_check_op_ordering(struct nfsd4_compoundargs *args) 2196 { 2197 struct nfsd4_op *first_op = &args->ops[0]; 2198 2199 /* These ordering requirements don't apply to NFSv4.0: */ 2200 if (args->minorversion == 0) 2201 return nfs_ok; 2202 /* This is weird, but OK, not our problem: */ 2203 if (args->opcnt == 0) 2204 return nfs_ok; 2205 if (first_op->status == nfserr_op_illegal) 2206 return nfs_ok; 2207 if (!(nfsd4_ops[first_op->opnum].op_flags & ALLOWED_AS_FIRST_OP)) 2208 return nfserr_op_not_in_session; 2209 if (first_op->opnum == OP_SEQUENCE) 2210 return nfs_ok; 2211 /* 2212 * So first_op is something allowed outside a session, like 2213 * EXCHANGE_ID; but then it has to be the only op in the 2214 * compound: 2215 */ 2216 if (args->opcnt != 1) 2217 return nfserr_not_only_op; 2218 return nfs_ok; 2219 } 2220 2221 const struct nfsd4_operation *OPDESC(struct nfsd4_op *op) 2222 { 2223 return &nfsd4_ops[op->opnum]; 2224 } 2225 2226 bool nfsd4_cache_this_op(struct nfsd4_op *op) 2227 { 2228 if (op->opnum == OP_ILLEGAL) 2229 return false; 2230 return OPDESC(op)->op_flags & OP_CACHEME; 2231 } 2232 2233 static bool need_wrongsec_check(struct svc_rqst *rqstp) 2234 { 2235 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2236 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 2237 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 2238 struct nfsd4_op *next = &argp->ops[resp->opcnt]; 2239 const struct nfsd4_operation *thisd = OPDESC(this); 2240 const struct nfsd4_operation *nextd; 2241 2242 /* 2243 * Most ops check wronsec on our own; only the putfh-like ops 2244 * have special rules. 2245 */ 2246 if (!(thisd->op_flags & OP_IS_PUTFH_LIKE)) 2247 return false; 2248 /* 2249 * rfc 5661 2.6.3.1.1.6: don't bother erroring out a 2250 * put-filehandle operation if we're not going to use the 2251 * result: 2252 */ 2253 if (argp->opcnt == resp->opcnt) 2254 return false; 2255 if (next->opnum == OP_ILLEGAL) 2256 return false; 2257 nextd = OPDESC(next); 2258 /* 2259 * Rest of 2.6.3.1.1: certain operations will return WRONGSEC 2260 * errors themselves as necessary; others should check for them 2261 * now: 2262 */ 2263 return !(nextd->op_flags & OP_HANDLES_WRONGSEC); 2264 } 2265 2266 static void svcxdr_init_encode(struct svc_rqst *rqstp, 2267 struct nfsd4_compoundres *resp) 2268 { 2269 struct xdr_stream *xdr = &resp->xdr; 2270 struct xdr_buf *buf = &rqstp->rq_res; 2271 struct kvec *head = buf->head; 2272 2273 xdr->buf = buf; 2274 xdr->iov = head; 2275 xdr->p = head->iov_base + head->iov_len; 2276 xdr->end = head->iov_base + PAGE_SIZE - rqstp->rq_auth_slack; 2277 /* Tail and page_len should be zero at this point: */ 2278 buf->len = buf->head[0].iov_len; 2279 xdr->scratch.iov_len = 0; 2280 xdr->page_ptr = buf->pages - 1; 2281 buf->buflen = PAGE_SIZE * (1 + rqstp->rq_page_end - buf->pages) 2282 - rqstp->rq_auth_slack; 2283 } 2284 2285 #ifdef CONFIG_NFSD_V4_2_INTER_SSC 2286 static void 2287 check_if_stalefh_allowed(struct nfsd4_compoundargs *args) 2288 { 2289 struct nfsd4_op *op, *current_op = NULL, *saved_op = NULL; 2290 struct nfsd4_copy *copy; 2291 struct nfsd4_putfh *putfh; 2292 int i; 2293 2294 /* traverse all operation and if it's a COPY compound, mark the 2295 * source filehandle to skip verification 2296 */ 2297 for (i = 0; i < args->opcnt; i++) { 2298 op = &args->ops[i]; 2299 if (op->opnum == OP_PUTFH) 2300 current_op = op; 2301 else if (op->opnum == OP_SAVEFH) 2302 saved_op = current_op; 2303 else if (op->opnum == OP_RESTOREFH) 2304 current_op = saved_op; 2305 else if (op->opnum == OP_COPY) { 2306 copy = (struct nfsd4_copy *)&op->u; 2307 if (!saved_op) { 2308 op->status = nfserr_nofilehandle; 2309 return; 2310 } 2311 putfh = (struct nfsd4_putfh *)&saved_op->u; 2312 if (!copy->cp_intra) 2313 putfh->no_verify = true; 2314 } 2315 } 2316 } 2317 #else 2318 static void 2319 check_if_stalefh_allowed(struct nfsd4_compoundargs *args) 2320 { 2321 } 2322 #endif 2323 2324 /* 2325 * COMPOUND call. 2326 */ 2327 static __be32 2328 nfsd4_proc_compound(struct svc_rqst *rqstp) 2329 { 2330 struct nfsd4_compoundargs *args = rqstp->rq_argp; 2331 struct nfsd4_compoundres *resp = rqstp->rq_resp; 2332 struct nfsd4_op *op; 2333 struct nfsd4_compound_state *cstate = &resp->cstate; 2334 struct svc_fh *current_fh = &cstate->current_fh; 2335 struct svc_fh *save_fh = &cstate->save_fh; 2336 struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2337 __be32 status; 2338 2339 svcxdr_init_encode(rqstp, resp); 2340 resp->tagp = resp->xdr.p; 2341 /* reserve space for: taglen, tag, and opcnt */ 2342 xdr_reserve_space(&resp->xdr, 8 + args->taglen); 2343 resp->taglen = args->taglen; 2344 resp->tag = args->tag; 2345 resp->rqstp = rqstp; 2346 cstate->minorversion = args->minorversion; 2347 fh_init(current_fh, NFS4_FHSIZE); 2348 fh_init(save_fh, NFS4_FHSIZE); 2349 /* 2350 * Don't use the deferral mechanism for NFSv4; compounds make it 2351 * too hard to avoid non-idempotency problems. 2352 */ 2353 clear_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2354 2355 /* 2356 * According to RFC3010, this takes precedence over all other errors. 2357 */ 2358 status = nfserr_minor_vers_mismatch; 2359 if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0) 2360 goto out; 2361 status = nfserr_resource; 2362 if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND) 2363 goto out; 2364 2365 status = nfs41_check_op_ordering(args); 2366 if (status) { 2367 op = &args->ops[0]; 2368 op->status = status; 2369 resp->opcnt = 1; 2370 goto encode_op; 2371 } 2372 check_if_stalefh_allowed(args); 2373 2374 rqstp->rq_lease_breaker = (void **)&cstate->clp; 2375 2376 trace_nfsd_compound(rqstp, args->opcnt); 2377 while (!status && resp->opcnt < args->opcnt) { 2378 op = &args->ops[resp->opcnt++]; 2379 2380 /* 2381 * The XDR decode routines may have pre-set op->status; 2382 * for example, if there is a miscellaneous XDR error 2383 * it will be set to nfserr_bad_xdr. 2384 */ 2385 if (op->status) { 2386 if (op->opnum == OP_OPEN) 2387 op->status = nfsd4_open_omfg(rqstp, cstate, op); 2388 goto encode_op; 2389 } 2390 if (!current_fh->fh_dentry && 2391 !HAS_FH_FLAG(current_fh, NFSD4_FH_FOREIGN)) { 2392 if (!(op->opdesc->op_flags & ALLOWED_WITHOUT_FH)) { 2393 op->status = nfserr_nofilehandle; 2394 goto encode_op; 2395 } 2396 } else if (current_fh->fh_export && 2397 current_fh->fh_export->ex_fslocs.migrated && 2398 !(op->opdesc->op_flags & ALLOWED_ON_ABSENT_FS)) { 2399 op->status = nfserr_moved; 2400 goto encode_op; 2401 } 2402 2403 fh_clear_wcc(current_fh); 2404 2405 /* If op is non-idempotent */ 2406 if (op->opdesc->op_flags & OP_MODIFIES_SOMETHING) { 2407 /* 2408 * Don't execute this op if we couldn't encode a 2409 * succesful reply: 2410 */ 2411 u32 plen = op->opdesc->op_rsize_bop(rqstp, op); 2412 /* 2413 * Plus if there's another operation, make sure 2414 * we'll have space to at least encode an error: 2415 */ 2416 if (resp->opcnt < args->opcnt) 2417 plen += COMPOUND_ERR_SLACK_SPACE; 2418 op->status = nfsd4_check_resp_size(resp, plen); 2419 } 2420 2421 if (op->status) 2422 goto encode_op; 2423 2424 if (op->opdesc->op_get_currentstateid) 2425 op->opdesc->op_get_currentstateid(cstate, &op->u); 2426 op->status = op->opdesc->op_func(rqstp, cstate, &op->u); 2427 2428 /* Only from SEQUENCE */ 2429 if (cstate->status == nfserr_replay_cache) { 2430 dprintk("%s NFS4.1 replay from cache\n", __func__); 2431 status = op->status; 2432 goto out; 2433 } 2434 if (!op->status) { 2435 if (op->opdesc->op_set_currentstateid) 2436 op->opdesc->op_set_currentstateid(cstate, &op->u); 2437 2438 if (op->opdesc->op_flags & OP_CLEAR_STATEID) 2439 clear_current_stateid(cstate); 2440 2441 if (current_fh->fh_export && 2442 need_wrongsec_check(rqstp)) 2443 op->status = check_nfsd_access(current_fh->fh_export, rqstp); 2444 } 2445 encode_op: 2446 if (op->status == nfserr_replay_me) { 2447 op->replay = &cstate->replay_owner->so_replay; 2448 nfsd4_encode_replay(&resp->xdr, op); 2449 status = op->status = op->replay->rp_status; 2450 } else { 2451 nfsd4_encode_operation(resp, op); 2452 status = op->status; 2453 } 2454 2455 trace_nfsd_compound_status(args->opcnt, resp->opcnt, status, 2456 nfsd4_op_name(op->opnum)); 2457 2458 nfsd4_cstate_clear_replay(cstate); 2459 nfsd4_increment_op_stats(op->opnum); 2460 } 2461 2462 fh_put(current_fh); 2463 fh_put(save_fh); 2464 BUG_ON(cstate->replay_owner); 2465 out: 2466 cstate->status = status; 2467 /* Reset deferral mechanism for RPC deferrals */ 2468 set_bit(RQ_USEDEFERRAL, &rqstp->rq_flags); 2469 return rpc_success; 2470 } 2471 2472 #define op_encode_hdr_size (2) 2473 #define op_encode_stateid_maxsz (XDR_QUADLEN(NFS4_STATEID_SIZE)) 2474 #define op_encode_verifier_maxsz (XDR_QUADLEN(NFS4_VERIFIER_SIZE)) 2475 #define op_encode_change_info_maxsz (5) 2476 #define nfs4_fattr_bitmap_maxsz (4) 2477 2478 /* We'll fall back on returning no lockowner if run out of space: */ 2479 #define op_encode_lockowner_maxsz (0) 2480 #define op_encode_lock_denied_maxsz (8 + op_encode_lockowner_maxsz) 2481 2482 #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) 2483 2484 #define op_encode_ace_maxsz (3 + nfs4_owner_maxsz) 2485 #define op_encode_delegation_maxsz (1 + op_encode_stateid_maxsz + 1 + \ 2486 op_encode_ace_maxsz) 2487 2488 #define op_encode_channel_attrs_maxsz (6 + 1 + 1) 2489 2490 static inline u32 nfsd4_only_status_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2491 { 2492 return (op_encode_hdr_size) * sizeof(__be32); 2493 } 2494 2495 static inline u32 nfsd4_status_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2496 { 2497 return (op_encode_hdr_size + op_encode_stateid_maxsz)* sizeof(__be32); 2498 } 2499 2500 static inline u32 nfsd4_access_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2501 { 2502 /* ac_supported, ac_resp_access */ 2503 return (op_encode_hdr_size + 2)* sizeof(__be32); 2504 } 2505 2506 static inline u32 nfsd4_commit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2507 { 2508 return (op_encode_hdr_size + op_encode_verifier_maxsz) * sizeof(__be32); 2509 } 2510 2511 static inline u32 nfsd4_create_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2512 { 2513 return (op_encode_hdr_size + op_encode_change_info_maxsz 2514 + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2515 } 2516 2517 /* 2518 * Note since this is an idempotent operation we won't insist on failing 2519 * the op prematurely if the estimate is too large. We may turn off splice 2520 * reads unnecessarily. 2521 */ 2522 static inline u32 nfsd4_getattr_rsize(struct svc_rqst *rqstp, 2523 struct nfsd4_op *op) 2524 { 2525 u32 *bmap = op->u.getattr.ga_bmval; 2526 u32 bmap0 = bmap[0], bmap1 = bmap[1], bmap2 = bmap[2]; 2527 u32 ret = 0; 2528 2529 if (bmap0 & FATTR4_WORD0_ACL) 2530 return svc_max_payload(rqstp); 2531 if (bmap0 & FATTR4_WORD0_FS_LOCATIONS) 2532 return svc_max_payload(rqstp); 2533 2534 if (bmap1 & FATTR4_WORD1_OWNER) { 2535 ret += IDMAP_NAMESZ + 4; 2536 bmap1 &= ~FATTR4_WORD1_OWNER; 2537 } 2538 if (bmap1 & FATTR4_WORD1_OWNER_GROUP) { 2539 ret += IDMAP_NAMESZ + 4; 2540 bmap1 &= ~FATTR4_WORD1_OWNER_GROUP; 2541 } 2542 if (bmap0 & FATTR4_WORD0_FILEHANDLE) { 2543 ret += NFS4_FHSIZE + 4; 2544 bmap0 &= ~FATTR4_WORD0_FILEHANDLE; 2545 } 2546 if (bmap2 & FATTR4_WORD2_SECURITY_LABEL) { 2547 ret += NFS4_MAXLABELLEN + 12; 2548 bmap2 &= ~FATTR4_WORD2_SECURITY_LABEL; 2549 } 2550 /* 2551 * Largest of remaining attributes are 16 bytes (e.g., 2552 * supported_attributes) 2553 */ 2554 ret += 16 * (hweight32(bmap0) + hweight32(bmap1) + hweight32(bmap2)); 2555 /* bitmask, length */ 2556 ret += 20; 2557 return ret; 2558 } 2559 2560 static inline u32 nfsd4_getfh_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2561 { 2562 return (op_encode_hdr_size + 1) * sizeof(__be32) + NFS4_FHSIZE; 2563 } 2564 2565 static inline u32 nfsd4_link_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2566 { 2567 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2568 * sizeof(__be32); 2569 } 2570 2571 static inline u32 nfsd4_lock_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2572 { 2573 return (op_encode_hdr_size + op_encode_lock_denied_maxsz) 2574 * sizeof(__be32); 2575 } 2576 2577 static inline u32 nfsd4_open_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2578 { 2579 return (op_encode_hdr_size + op_encode_stateid_maxsz 2580 + op_encode_change_info_maxsz + 1 2581 + nfs4_fattr_bitmap_maxsz 2582 + op_encode_delegation_maxsz) * sizeof(__be32); 2583 } 2584 2585 static inline u32 nfsd4_read_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2586 { 2587 u32 maxcount = 0, rlen = 0; 2588 2589 maxcount = svc_max_payload(rqstp); 2590 rlen = min(op->u.read.rd_length, maxcount); 2591 2592 return (op_encode_hdr_size + 2 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2593 } 2594 2595 static inline u32 nfsd4_read_plus_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2596 { 2597 u32 maxcount = svc_max_payload(rqstp); 2598 u32 rlen = min(op->u.read.rd_length, maxcount); 2599 /* 2600 * If we detect that the file changed during hole encoding, then we 2601 * recover by encoding the remaining reply as data. This means we need 2602 * to set aside enough room to encode two data segments. 2603 */ 2604 u32 seg_len = 2 * (1 + 2 + 1); 2605 2606 return (op_encode_hdr_size + 2 + seg_len + XDR_QUADLEN(rlen)) * sizeof(__be32); 2607 } 2608 2609 static inline u32 nfsd4_readdir_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2610 { 2611 u32 maxcount = 0, rlen = 0; 2612 2613 maxcount = svc_max_payload(rqstp); 2614 rlen = min(op->u.readdir.rd_maxcount, maxcount); 2615 2616 return (op_encode_hdr_size + op_encode_verifier_maxsz + 2617 XDR_QUADLEN(rlen)) * sizeof(__be32); 2618 } 2619 2620 static inline u32 nfsd4_readlink_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2621 { 2622 return (op_encode_hdr_size + 1) * sizeof(__be32) + PAGE_SIZE; 2623 } 2624 2625 static inline u32 nfsd4_remove_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2626 { 2627 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2628 * sizeof(__be32); 2629 } 2630 2631 static inline u32 nfsd4_rename_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2632 { 2633 return (op_encode_hdr_size + op_encode_change_info_maxsz 2634 + op_encode_change_info_maxsz) * sizeof(__be32); 2635 } 2636 2637 static inline u32 nfsd4_sequence_rsize(struct svc_rqst *rqstp, 2638 struct nfsd4_op *op) 2639 { 2640 return (op_encode_hdr_size 2641 + XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + 5) * sizeof(__be32); 2642 } 2643 2644 static inline u32 nfsd4_test_stateid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2645 { 2646 return (op_encode_hdr_size + 1 + op->u.test_stateid.ts_num_ids) 2647 * sizeof(__be32); 2648 } 2649 2650 static inline u32 nfsd4_setattr_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2651 { 2652 return (op_encode_hdr_size + nfs4_fattr_bitmap_maxsz) * sizeof(__be32); 2653 } 2654 2655 static inline u32 nfsd4_secinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2656 { 2657 return (op_encode_hdr_size + RPC_AUTH_MAXFLAVOR * 2658 (4 + XDR_QUADLEN(GSS_OID_MAX_LEN))) * sizeof(__be32); 2659 } 2660 2661 static inline u32 nfsd4_setclientid_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2662 { 2663 return (op_encode_hdr_size + 2 + XDR_QUADLEN(NFS4_VERIFIER_SIZE)) * 2664 sizeof(__be32); 2665 } 2666 2667 static inline u32 nfsd4_write_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2668 { 2669 return (op_encode_hdr_size + 2 + op_encode_verifier_maxsz) * sizeof(__be32); 2670 } 2671 2672 static inline u32 nfsd4_exchange_id_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2673 { 2674 return (op_encode_hdr_size + 2 + 1 + /* eir_clientid, eir_sequenceid */\ 2675 1 + 1 + /* eir_flags, spr_how */\ 2676 4 + /* spo_must_enforce & _allow with bitmap */\ 2677 2 + /*eir_server_owner.so_minor_id */\ 2678 /* eir_server_owner.so_major_id<> */\ 2679 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2680 /* eir_server_scope<> */\ 2681 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) + 1 +\ 2682 1 + /* eir_server_impl_id array length */\ 2683 0 /* ignored eir_server_impl_id contents */) * sizeof(__be32); 2684 } 2685 2686 static inline u32 nfsd4_bind_conn_to_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2687 { 2688 return (op_encode_hdr_size + \ 2689 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* bctsr_sessid */\ 2690 2 /* bctsr_dir, use_conn_in_rdma_mode */) * sizeof(__be32); 2691 } 2692 2693 static inline u32 nfsd4_create_session_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2694 { 2695 return (op_encode_hdr_size + \ 2696 XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + /* sessionid */\ 2697 2 + /* csr_sequence, csr_flags */\ 2698 op_encode_channel_attrs_maxsz + \ 2699 op_encode_channel_attrs_maxsz) * sizeof(__be32); 2700 } 2701 2702 static inline u32 nfsd4_copy_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2703 { 2704 return (op_encode_hdr_size + 2705 1 /* wr_callback */ + 2706 op_encode_stateid_maxsz /* wr_callback */ + 2707 2 /* wr_count */ + 2708 1 /* wr_committed */ + 2709 op_encode_verifier_maxsz + 2710 1 /* cr_consecutive */ + 2711 1 /* cr_synchronous */) * sizeof(__be32); 2712 } 2713 2714 static inline u32 nfsd4_offload_status_rsize(struct svc_rqst *rqstp, 2715 struct nfsd4_op *op) 2716 { 2717 return (op_encode_hdr_size + 2718 2 /* osr_count */ + 2719 1 /* osr_complete<1> optional 0 for now */) * sizeof(__be32); 2720 } 2721 2722 static inline u32 nfsd4_copy_notify_rsize(struct svc_rqst *rqstp, 2723 struct nfsd4_op *op) 2724 { 2725 return (op_encode_hdr_size + 2726 3 /* cnr_lease_time */ + 2727 1 /* We support one cnr_source_server */ + 2728 1 /* cnr_stateid seq */ + 2729 op_encode_stateid_maxsz /* cnr_stateid */ + 2730 1 /* num cnr_source_server*/ + 2731 1 /* nl4_type */ + 2732 1 /* nl4 size */ + 2733 XDR_QUADLEN(NFS4_OPAQUE_LIMIT) /*nl4_loc + nl4_loc_sz */) 2734 * sizeof(__be32); 2735 } 2736 2737 #ifdef CONFIG_NFSD_PNFS 2738 static inline u32 nfsd4_getdeviceinfo_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2739 { 2740 u32 maxcount = 0, rlen = 0; 2741 2742 maxcount = svc_max_payload(rqstp); 2743 rlen = min(op->u.getdeviceinfo.gd_maxcount, maxcount); 2744 2745 return (op_encode_hdr_size + 2746 1 /* gd_layout_type*/ + 2747 XDR_QUADLEN(rlen) + 2748 2 /* gd_notify_types */) * sizeof(__be32); 2749 } 2750 2751 /* 2752 * At this stage we don't really know what layout driver will handle the request, 2753 * so we need to define an arbitrary upper bound here. 2754 */ 2755 #define MAX_LAYOUT_SIZE 128 2756 static inline u32 nfsd4_layoutget_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2757 { 2758 return (op_encode_hdr_size + 2759 1 /* logr_return_on_close */ + 2760 op_encode_stateid_maxsz + 2761 1 /* nr of layouts */ + 2762 MAX_LAYOUT_SIZE) * sizeof(__be32); 2763 } 2764 2765 static inline u32 nfsd4_layoutcommit_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2766 { 2767 return (op_encode_hdr_size + 2768 1 /* locr_newsize */ + 2769 2 /* ns_size */) * sizeof(__be32); 2770 } 2771 2772 static inline u32 nfsd4_layoutreturn_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2773 { 2774 return (op_encode_hdr_size + 2775 1 /* lrs_stateid */ + 2776 op_encode_stateid_maxsz) * sizeof(__be32); 2777 } 2778 #endif /* CONFIG_NFSD_PNFS */ 2779 2780 2781 static inline u32 nfsd4_seek_rsize(struct svc_rqst *rqstp, struct nfsd4_op *op) 2782 { 2783 return (op_encode_hdr_size + 3) * sizeof(__be32); 2784 } 2785 2786 static inline u32 nfsd4_getxattr_rsize(struct svc_rqst *rqstp, 2787 struct nfsd4_op *op) 2788 { 2789 u32 maxcount, rlen; 2790 2791 maxcount = svc_max_payload(rqstp); 2792 rlen = min_t(u32, XATTR_SIZE_MAX, maxcount); 2793 2794 return (op_encode_hdr_size + 1 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2795 } 2796 2797 static inline u32 nfsd4_setxattr_rsize(struct svc_rqst *rqstp, 2798 struct nfsd4_op *op) 2799 { 2800 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2801 * sizeof(__be32); 2802 } 2803 static inline u32 nfsd4_listxattrs_rsize(struct svc_rqst *rqstp, 2804 struct nfsd4_op *op) 2805 { 2806 u32 maxcount, rlen; 2807 2808 maxcount = svc_max_payload(rqstp); 2809 rlen = min(op->u.listxattrs.lsxa_maxcount, maxcount); 2810 2811 return (op_encode_hdr_size + 4 + XDR_QUADLEN(rlen)) * sizeof(__be32); 2812 } 2813 2814 static inline u32 nfsd4_removexattr_rsize(struct svc_rqst *rqstp, 2815 struct nfsd4_op *op) 2816 { 2817 return (op_encode_hdr_size + op_encode_change_info_maxsz) 2818 * sizeof(__be32); 2819 } 2820 2821 2822 static const struct nfsd4_operation nfsd4_ops[] = { 2823 [OP_ACCESS] = { 2824 .op_func = nfsd4_access, 2825 .op_name = "OP_ACCESS", 2826 .op_rsize_bop = nfsd4_access_rsize, 2827 }, 2828 [OP_CLOSE] = { 2829 .op_func = nfsd4_close, 2830 .op_flags = OP_MODIFIES_SOMETHING, 2831 .op_name = "OP_CLOSE", 2832 .op_rsize_bop = nfsd4_status_stateid_rsize, 2833 .op_get_currentstateid = nfsd4_get_closestateid, 2834 .op_set_currentstateid = nfsd4_set_closestateid, 2835 }, 2836 [OP_COMMIT] = { 2837 .op_func = nfsd4_commit, 2838 .op_flags = OP_MODIFIES_SOMETHING, 2839 .op_name = "OP_COMMIT", 2840 .op_rsize_bop = nfsd4_commit_rsize, 2841 }, 2842 [OP_CREATE] = { 2843 .op_func = nfsd4_create, 2844 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME | OP_CLEAR_STATEID, 2845 .op_name = "OP_CREATE", 2846 .op_rsize_bop = nfsd4_create_rsize, 2847 }, 2848 [OP_DELEGRETURN] = { 2849 .op_func = nfsd4_delegreturn, 2850 .op_flags = OP_MODIFIES_SOMETHING, 2851 .op_name = "OP_DELEGRETURN", 2852 .op_rsize_bop = nfsd4_only_status_rsize, 2853 .op_get_currentstateid = nfsd4_get_delegreturnstateid, 2854 }, 2855 [OP_GETATTR] = { 2856 .op_func = nfsd4_getattr, 2857 .op_flags = ALLOWED_ON_ABSENT_FS, 2858 .op_rsize_bop = nfsd4_getattr_rsize, 2859 .op_name = "OP_GETATTR", 2860 }, 2861 [OP_GETFH] = { 2862 .op_func = nfsd4_getfh, 2863 .op_name = "OP_GETFH", 2864 .op_rsize_bop = nfsd4_getfh_rsize, 2865 }, 2866 [OP_LINK] = { 2867 .op_func = nfsd4_link, 2868 .op_flags = ALLOWED_ON_ABSENT_FS | OP_MODIFIES_SOMETHING 2869 | OP_CACHEME, 2870 .op_name = "OP_LINK", 2871 .op_rsize_bop = nfsd4_link_rsize, 2872 }, 2873 [OP_LOCK] = { 2874 .op_func = nfsd4_lock, 2875 .op_flags = OP_MODIFIES_SOMETHING | 2876 OP_NONTRIVIAL_ERROR_ENCODE, 2877 .op_name = "OP_LOCK", 2878 .op_rsize_bop = nfsd4_lock_rsize, 2879 .op_set_currentstateid = nfsd4_set_lockstateid, 2880 }, 2881 [OP_LOCKT] = { 2882 .op_func = nfsd4_lockt, 2883 .op_flags = OP_NONTRIVIAL_ERROR_ENCODE, 2884 .op_name = "OP_LOCKT", 2885 .op_rsize_bop = nfsd4_lock_rsize, 2886 }, 2887 [OP_LOCKU] = { 2888 .op_func = nfsd4_locku, 2889 .op_flags = OP_MODIFIES_SOMETHING, 2890 .op_name = "OP_LOCKU", 2891 .op_rsize_bop = nfsd4_status_stateid_rsize, 2892 .op_get_currentstateid = nfsd4_get_lockustateid, 2893 }, 2894 [OP_LOOKUP] = { 2895 .op_func = nfsd4_lookup, 2896 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2897 .op_name = "OP_LOOKUP", 2898 .op_rsize_bop = nfsd4_only_status_rsize, 2899 }, 2900 [OP_LOOKUPP] = { 2901 .op_func = nfsd4_lookupp, 2902 .op_flags = OP_HANDLES_WRONGSEC | OP_CLEAR_STATEID, 2903 .op_name = "OP_LOOKUPP", 2904 .op_rsize_bop = nfsd4_only_status_rsize, 2905 }, 2906 [OP_NVERIFY] = { 2907 .op_func = nfsd4_nverify, 2908 .op_name = "OP_NVERIFY", 2909 .op_rsize_bop = nfsd4_only_status_rsize, 2910 }, 2911 [OP_OPEN] = { 2912 .op_func = nfsd4_open, 2913 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 2914 .op_name = "OP_OPEN", 2915 .op_rsize_bop = nfsd4_open_rsize, 2916 .op_set_currentstateid = nfsd4_set_openstateid, 2917 }, 2918 [OP_OPEN_CONFIRM] = { 2919 .op_func = nfsd4_open_confirm, 2920 .op_flags = OP_MODIFIES_SOMETHING, 2921 .op_name = "OP_OPEN_CONFIRM", 2922 .op_rsize_bop = nfsd4_status_stateid_rsize, 2923 }, 2924 [OP_OPEN_DOWNGRADE] = { 2925 .op_func = nfsd4_open_downgrade, 2926 .op_flags = OP_MODIFIES_SOMETHING, 2927 .op_name = "OP_OPEN_DOWNGRADE", 2928 .op_rsize_bop = nfsd4_status_stateid_rsize, 2929 .op_get_currentstateid = nfsd4_get_opendowngradestateid, 2930 .op_set_currentstateid = nfsd4_set_opendowngradestateid, 2931 }, 2932 [OP_PUTFH] = { 2933 .op_func = nfsd4_putfh, 2934 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2935 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2936 .op_name = "OP_PUTFH", 2937 .op_rsize_bop = nfsd4_only_status_rsize, 2938 }, 2939 [OP_PUTPUBFH] = { 2940 .op_func = nfsd4_putrootfh, 2941 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2942 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2943 .op_name = "OP_PUTPUBFH", 2944 .op_rsize_bop = nfsd4_only_status_rsize, 2945 }, 2946 [OP_PUTROOTFH] = { 2947 .op_func = nfsd4_putrootfh, 2948 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2949 | OP_IS_PUTFH_LIKE | OP_CLEAR_STATEID, 2950 .op_name = "OP_PUTROOTFH", 2951 .op_rsize_bop = nfsd4_only_status_rsize, 2952 }, 2953 [OP_READ] = { 2954 .op_func = nfsd4_read, 2955 .op_release = nfsd4_read_release, 2956 .op_name = "OP_READ", 2957 .op_rsize_bop = nfsd4_read_rsize, 2958 .op_get_currentstateid = nfsd4_get_readstateid, 2959 }, 2960 [OP_READDIR] = { 2961 .op_func = nfsd4_readdir, 2962 .op_name = "OP_READDIR", 2963 .op_rsize_bop = nfsd4_readdir_rsize, 2964 }, 2965 [OP_READLINK] = { 2966 .op_func = nfsd4_readlink, 2967 .op_name = "OP_READLINK", 2968 .op_rsize_bop = nfsd4_readlink_rsize, 2969 }, 2970 [OP_REMOVE] = { 2971 .op_func = nfsd4_remove, 2972 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2973 .op_name = "OP_REMOVE", 2974 .op_rsize_bop = nfsd4_remove_rsize, 2975 }, 2976 [OP_RENAME] = { 2977 .op_func = nfsd4_rename, 2978 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 2979 .op_name = "OP_RENAME", 2980 .op_rsize_bop = nfsd4_rename_rsize, 2981 }, 2982 [OP_RENEW] = { 2983 .op_func = nfsd4_renew, 2984 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2985 | OP_MODIFIES_SOMETHING, 2986 .op_name = "OP_RENEW", 2987 .op_rsize_bop = nfsd4_only_status_rsize, 2988 2989 }, 2990 [OP_RESTOREFH] = { 2991 .op_func = nfsd4_restorefh, 2992 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 2993 | OP_IS_PUTFH_LIKE | OP_MODIFIES_SOMETHING, 2994 .op_name = "OP_RESTOREFH", 2995 .op_rsize_bop = nfsd4_only_status_rsize, 2996 }, 2997 [OP_SAVEFH] = { 2998 .op_func = nfsd4_savefh, 2999 .op_flags = OP_HANDLES_WRONGSEC | OP_MODIFIES_SOMETHING, 3000 .op_name = "OP_SAVEFH", 3001 .op_rsize_bop = nfsd4_only_status_rsize, 3002 }, 3003 [OP_SECINFO] = { 3004 .op_func = nfsd4_secinfo, 3005 .op_release = nfsd4_secinfo_release, 3006 .op_flags = OP_HANDLES_WRONGSEC, 3007 .op_name = "OP_SECINFO", 3008 .op_rsize_bop = nfsd4_secinfo_rsize, 3009 }, 3010 [OP_SETATTR] = { 3011 .op_func = nfsd4_setattr, 3012 .op_name = "OP_SETATTR", 3013 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME 3014 | OP_NONTRIVIAL_ERROR_ENCODE, 3015 .op_rsize_bop = nfsd4_setattr_rsize, 3016 .op_get_currentstateid = nfsd4_get_setattrstateid, 3017 }, 3018 [OP_SETCLIENTID] = { 3019 .op_func = nfsd4_setclientid, 3020 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3021 | OP_MODIFIES_SOMETHING | OP_CACHEME 3022 | OP_NONTRIVIAL_ERROR_ENCODE, 3023 .op_name = "OP_SETCLIENTID", 3024 .op_rsize_bop = nfsd4_setclientid_rsize, 3025 }, 3026 [OP_SETCLIENTID_CONFIRM] = { 3027 .op_func = nfsd4_setclientid_confirm, 3028 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3029 | OP_MODIFIES_SOMETHING | OP_CACHEME, 3030 .op_name = "OP_SETCLIENTID_CONFIRM", 3031 .op_rsize_bop = nfsd4_only_status_rsize, 3032 }, 3033 [OP_VERIFY] = { 3034 .op_func = nfsd4_verify, 3035 .op_name = "OP_VERIFY", 3036 .op_rsize_bop = nfsd4_only_status_rsize, 3037 }, 3038 [OP_WRITE] = { 3039 .op_func = nfsd4_write, 3040 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3041 .op_name = "OP_WRITE", 3042 .op_rsize_bop = nfsd4_write_rsize, 3043 .op_get_currentstateid = nfsd4_get_writestateid, 3044 }, 3045 [OP_RELEASE_LOCKOWNER] = { 3046 .op_func = nfsd4_release_lockowner, 3047 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_ON_ABSENT_FS 3048 | OP_MODIFIES_SOMETHING, 3049 .op_name = "OP_RELEASE_LOCKOWNER", 3050 .op_rsize_bop = nfsd4_only_status_rsize, 3051 }, 3052 3053 /* NFSv4.1 operations */ 3054 [OP_EXCHANGE_ID] = { 3055 .op_func = nfsd4_exchange_id, 3056 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3057 | OP_MODIFIES_SOMETHING, 3058 .op_name = "OP_EXCHANGE_ID", 3059 .op_rsize_bop = nfsd4_exchange_id_rsize, 3060 }, 3061 [OP_BACKCHANNEL_CTL] = { 3062 .op_func = nfsd4_backchannel_ctl, 3063 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3064 .op_name = "OP_BACKCHANNEL_CTL", 3065 .op_rsize_bop = nfsd4_only_status_rsize, 3066 }, 3067 [OP_BIND_CONN_TO_SESSION] = { 3068 .op_func = nfsd4_bind_conn_to_session, 3069 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3070 | OP_MODIFIES_SOMETHING, 3071 .op_name = "OP_BIND_CONN_TO_SESSION", 3072 .op_rsize_bop = nfsd4_bind_conn_to_session_rsize, 3073 }, 3074 [OP_CREATE_SESSION] = { 3075 .op_func = nfsd4_create_session, 3076 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3077 | OP_MODIFIES_SOMETHING, 3078 .op_name = "OP_CREATE_SESSION", 3079 .op_rsize_bop = nfsd4_create_session_rsize, 3080 }, 3081 [OP_DESTROY_SESSION] = { 3082 .op_func = nfsd4_destroy_session, 3083 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3084 | OP_MODIFIES_SOMETHING, 3085 .op_name = "OP_DESTROY_SESSION", 3086 .op_rsize_bop = nfsd4_only_status_rsize, 3087 }, 3088 [OP_SEQUENCE] = { 3089 .op_func = nfsd4_sequence, 3090 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP, 3091 .op_name = "OP_SEQUENCE", 3092 .op_rsize_bop = nfsd4_sequence_rsize, 3093 }, 3094 [OP_DESTROY_CLIENTID] = { 3095 .op_func = nfsd4_destroy_clientid, 3096 .op_flags = ALLOWED_WITHOUT_FH | ALLOWED_AS_FIRST_OP 3097 | OP_MODIFIES_SOMETHING, 3098 .op_name = "OP_DESTROY_CLIENTID", 3099 .op_rsize_bop = nfsd4_only_status_rsize, 3100 }, 3101 [OP_RECLAIM_COMPLETE] = { 3102 .op_func = nfsd4_reclaim_complete, 3103 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3104 .op_name = "OP_RECLAIM_COMPLETE", 3105 .op_rsize_bop = nfsd4_only_status_rsize, 3106 }, 3107 [OP_SECINFO_NO_NAME] = { 3108 .op_func = nfsd4_secinfo_no_name, 3109 .op_release = nfsd4_secinfo_no_name_release, 3110 .op_flags = OP_HANDLES_WRONGSEC, 3111 .op_name = "OP_SECINFO_NO_NAME", 3112 .op_rsize_bop = nfsd4_secinfo_rsize, 3113 }, 3114 [OP_TEST_STATEID] = { 3115 .op_func = nfsd4_test_stateid, 3116 .op_flags = ALLOWED_WITHOUT_FH, 3117 .op_name = "OP_TEST_STATEID", 3118 .op_rsize_bop = nfsd4_test_stateid_rsize, 3119 }, 3120 [OP_FREE_STATEID] = { 3121 .op_func = nfsd4_free_stateid, 3122 .op_flags = ALLOWED_WITHOUT_FH | OP_MODIFIES_SOMETHING, 3123 .op_name = "OP_FREE_STATEID", 3124 .op_get_currentstateid = nfsd4_get_freestateid, 3125 .op_rsize_bop = nfsd4_only_status_rsize, 3126 }, 3127 #ifdef CONFIG_NFSD_PNFS 3128 [OP_GETDEVICEINFO] = { 3129 .op_func = nfsd4_getdeviceinfo, 3130 .op_release = nfsd4_getdeviceinfo_release, 3131 .op_flags = ALLOWED_WITHOUT_FH, 3132 .op_name = "OP_GETDEVICEINFO", 3133 .op_rsize_bop = nfsd4_getdeviceinfo_rsize, 3134 }, 3135 [OP_LAYOUTGET] = { 3136 .op_func = nfsd4_layoutget, 3137 .op_release = nfsd4_layoutget_release, 3138 .op_flags = OP_MODIFIES_SOMETHING, 3139 .op_name = "OP_LAYOUTGET", 3140 .op_rsize_bop = nfsd4_layoutget_rsize, 3141 }, 3142 [OP_LAYOUTCOMMIT] = { 3143 .op_func = nfsd4_layoutcommit, 3144 .op_flags = OP_MODIFIES_SOMETHING, 3145 .op_name = "OP_LAYOUTCOMMIT", 3146 .op_rsize_bop = nfsd4_layoutcommit_rsize, 3147 }, 3148 [OP_LAYOUTRETURN] = { 3149 .op_func = nfsd4_layoutreturn, 3150 .op_flags = OP_MODIFIES_SOMETHING, 3151 .op_name = "OP_LAYOUTRETURN", 3152 .op_rsize_bop = nfsd4_layoutreturn_rsize, 3153 }, 3154 #endif /* CONFIG_NFSD_PNFS */ 3155 3156 /* NFSv4.2 operations */ 3157 [OP_ALLOCATE] = { 3158 .op_func = nfsd4_allocate, 3159 .op_flags = OP_MODIFIES_SOMETHING, 3160 .op_name = "OP_ALLOCATE", 3161 .op_rsize_bop = nfsd4_only_status_rsize, 3162 }, 3163 [OP_DEALLOCATE] = { 3164 .op_func = nfsd4_deallocate, 3165 .op_flags = OP_MODIFIES_SOMETHING, 3166 .op_name = "OP_DEALLOCATE", 3167 .op_rsize_bop = nfsd4_only_status_rsize, 3168 }, 3169 [OP_CLONE] = { 3170 .op_func = nfsd4_clone, 3171 .op_flags = OP_MODIFIES_SOMETHING, 3172 .op_name = "OP_CLONE", 3173 .op_rsize_bop = nfsd4_only_status_rsize, 3174 }, 3175 [OP_COPY] = { 3176 .op_func = nfsd4_copy, 3177 .op_flags = OP_MODIFIES_SOMETHING, 3178 .op_name = "OP_COPY", 3179 .op_rsize_bop = nfsd4_copy_rsize, 3180 }, 3181 [OP_READ_PLUS] = { 3182 .op_func = nfsd4_read, 3183 .op_release = nfsd4_read_release, 3184 .op_name = "OP_READ_PLUS", 3185 .op_rsize_bop = nfsd4_read_plus_rsize, 3186 .op_get_currentstateid = nfsd4_get_readstateid, 3187 }, 3188 [OP_SEEK] = { 3189 .op_func = nfsd4_seek, 3190 .op_name = "OP_SEEK", 3191 .op_rsize_bop = nfsd4_seek_rsize, 3192 }, 3193 [OP_OFFLOAD_STATUS] = { 3194 .op_func = nfsd4_offload_status, 3195 .op_name = "OP_OFFLOAD_STATUS", 3196 .op_rsize_bop = nfsd4_offload_status_rsize, 3197 }, 3198 [OP_OFFLOAD_CANCEL] = { 3199 .op_func = nfsd4_offload_cancel, 3200 .op_flags = OP_MODIFIES_SOMETHING, 3201 .op_name = "OP_OFFLOAD_CANCEL", 3202 .op_rsize_bop = nfsd4_only_status_rsize, 3203 }, 3204 [OP_COPY_NOTIFY] = { 3205 .op_func = nfsd4_copy_notify, 3206 .op_flags = OP_MODIFIES_SOMETHING, 3207 .op_name = "OP_COPY_NOTIFY", 3208 .op_rsize_bop = nfsd4_copy_notify_rsize, 3209 }, 3210 [OP_GETXATTR] = { 3211 .op_func = nfsd4_getxattr, 3212 .op_name = "OP_GETXATTR", 3213 .op_rsize_bop = nfsd4_getxattr_rsize, 3214 }, 3215 [OP_SETXATTR] = { 3216 .op_func = nfsd4_setxattr, 3217 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3218 .op_name = "OP_SETXATTR", 3219 .op_rsize_bop = nfsd4_setxattr_rsize, 3220 }, 3221 [OP_LISTXATTRS] = { 3222 .op_func = nfsd4_listxattrs, 3223 .op_name = "OP_LISTXATTRS", 3224 .op_rsize_bop = nfsd4_listxattrs_rsize, 3225 }, 3226 [OP_REMOVEXATTR] = { 3227 .op_func = nfsd4_removexattr, 3228 .op_flags = OP_MODIFIES_SOMETHING | OP_CACHEME, 3229 .op_name = "OP_REMOVEXATTR", 3230 .op_rsize_bop = nfsd4_removexattr_rsize, 3231 }, 3232 }; 3233 3234 /** 3235 * nfsd4_spo_must_allow - Determine if the compound op contains an 3236 * operation that is allowed to be sent with machine credentials 3237 * 3238 * @rqstp: a pointer to the struct svc_rqst 3239 * 3240 * Checks to see if the compound contains a spo_must_allow op 3241 * and confirms that it was sent with the proper machine creds. 3242 */ 3243 3244 bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) 3245 { 3246 struct nfsd4_compoundres *resp = rqstp->rq_resp; 3247 struct nfsd4_compoundargs *argp = rqstp->rq_argp; 3248 struct nfsd4_op *this = &argp->ops[resp->opcnt - 1]; 3249 struct nfsd4_compound_state *cstate = &resp->cstate; 3250 struct nfs4_op_map *allow = &cstate->clp->cl_spo_must_allow; 3251 u32 opiter; 3252 3253 if (!cstate->minorversion) 3254 return false; 3255 3256 if (cstate->spo_must_allowed) 3257 return true; 3258 3259 opiter = resp->opcnt; 3260 while (opiter < argp->opcnt) { 3261 this = &argp->ops[opiter++]; 3262 if (test_bit(this->opnum, allow->u.longs) && 3263 cstate->clp->cl_mach_cred && 3264 nfsd4_mach_creds_match(cstate->clp, rqstp)) { 3265 cstate->spo_must_allowed = true; 3266 return true; 3267 } 3268 } 3269 cstate->spo_must_allowed = false; 3270 return false; 3271 } 3272 3273 int nfsd4_max_reply(struct svc_rqst *rqstp, struct nfsd4_op *op) 3274 { 3275 if (op->opnum == OP_ILLEGAL || op->status == nfserr_notsupp) 3276 return op_encode_hdr_size * sizeof(__be32); 3277 3278 BUG_ON(OPDESC(op)->op_rsize_bop == NULL); 3279 return OPDESC(op)->op_rsize_bop(rqstp, op); 3280 } 3281 3282 void warn_on_nonidempotent_op(struct nfsd4_op *op) 3283 { 3284 if (OPDESC(op)->op_flags & OP_MODIFIES_SOMETHING) { 3285 pr_err("unable to encode reply to nonidempotent op %d (%s)\n", 3286 op->opnum, nfsd4_op_name(op->opnum)); 3287 WARN_ON_ONCE(1); 3288 } 3289 } 3290 3291 static const char *nfsd4_op_name(unsigned opnum) 3292 { 3293 if (opnum < ARRAY_SIZE(nfsd4_ops)) 3294 return nfsd4_ops[opnum].op_name; 3295 return "unknown_operation"; 3296 } 3297 3298 #define nfsd4_voidres nfsd4_voidargs 3299 struct nfsd4_voidargs { int dummy; }; 3300 3301 static const struct svc_procedure nfsd_procedures4[2] = { 3302 [NFSPROC4_NULL] = { 3303 .pc_func = nfsd4_proc_null, 3304 .pc_decode = nfs4svc_decode_voidarg, 3305 .pc_encode = nfs4svc_encode_voidres, 3306 .pc_argsize = sizeof(struct nfsd4_voidargs), 3307 .pc_ressize = sizeof(struct nfsd4_voidres), 3308 .pc_cachetype = RC_NOCACHE, 3309 .pc_xdrressize = 1, 3310 }, 3311 [NFSPROC4_COMPOUND] = { 3312 .pc_func = nfsd4_proc_compound, 3313 .pc_decode = nfs4svc_decode_compoundargs, 3314 .pc_encode = nfs4svc_encode_compoundres, 3315 .pc_argsize = sizeof(struct nfsd4_compoundargs), 3316 .pc_ressize = sizeof(struct nfsd4_compoundres), 3317 .pc_release = nfsd4_release_compoundargs, 3318 .pc_cachetype = RC_NOCACHE, 3319 .pc_xdrressize = NFSD_BUFSIZE/4, 3320 }, 3321 }; 3322 3323 static unsigned int nfsd_count3[ARRAY_SIZE(nfsd_procedures4)]; 3324 const struct svc_version nfsd_version4 = { 3325 .vs_vers = 4, 3326 .vs_nproc = 2, 3327 .vs_proc = nfsd_procedures4, 3328 .vs_count = nfsd_count3, 3329 .vs_dispatch = nfsd_dispatch, 3330 .vs_xdrsize = NFS4_SVC_XDRSIZE, 3331 .vs_rpcb_optnl = true, 3332 .vs_need_cong_ctrl = true, 3333 }; 3334 3335 /* 3336 * Local variables: 3337 * c-basic-offset: 8 3338 * End: 3339 */ 3340