1 /* 2 * fs/nfs/nfs4proc.c 3 * 4 * Client-side procedure declarations for NFSv4. 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <linux/mm.h> 39 #include <linux/delay.h> 40 #include <linux/errno.h> 41 #include <linux/string.h> 42 #include <linux/ratelimit.h> 43 #include <linux/printk.h> 44 #include <linux/slab.h> 45 #include <linux/sunrpc/clnt.h> 46 #include <linux/nfs.h> 47 #include <linux/nfs4.h> 48 #include <linux/nfs_fs.h> 49 #include <linux/nfs_page.h> 50 #include <linux/nfs_mount.h> 51 #include <linux/namei.h> 52 #include <linux/mount.h> 53 #include <linux/module.h> 54 #include <linux/xattr.h> 55 #include <linux/utsname.h> 56 #include <linux/freezer.h> 57 58 #include "nfs4_fs.h" 59 #include "delegation.h" 60 #include "internal.h" 61 #include "iostat.h" 62 #include "callback.h" 63 #include "pnfs.h" 64 #include "netns.h" 65 #include "nfs4idmap.h" 66 #include "nfs4session.h" 67 #include "fscache.h" 68 69 #include "nfs4trace.h" 70 71 #define NFSDBG_FACILITY NFSDBG_PROC 72 73 #define NFS4_POLL_RETRY_MIN (HZ/10) 74 #define NFS4_POLL_RETRY_MAX (15*HZ) 75 76 /* file attributes which can be mapped to nfs attributes */ 77 #define NFS4_VALID_ATTRS (ATTR_MODE \ 78 | ATTR_UID \ 79 | ATTR_GID \ 80 | ATTR_SIZE \ 81 | ATTR_ATIME \ 82 | ATTR_MTIME \ 83 | ATTR_CTIME \ 84 | ATTR_ATIME_SET \ 85 | ATTR_MTIME_SET) 86 87 struct nfs4_opendata; 88 static int _nfs4_proc_open(struct nfs4_opendata *data); 89 static int _nfs4_recover_proc_open(struct nfs4_opendata *data); 90 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 91 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); 92 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label); 93 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label); 94 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 95 struct nfs_fattr *fattr, struct iattr *sattr, 96 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 97 struct nfs4_label *olabel); 98 #ifdef CONFIG_NFS_V4_1 99 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 100 struct rpc_cred *); 101 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *, 102 struct rpc_cred *, bool); 103 #endif 104 105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 106 static inline struct nfs4_label * 107 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 108 struct iattr *sattr, struct nfs4_label *label) 109 { 110 int err; 111 112 if (label == NULL) 113 return NULL; 114 115 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 116 return NULL; 117 118 err = security_dentry_init_security(dentry, sattr->ia_mode, 119 &dentry->d_name, (void **)&label->label, &label->len); 120 if (err == 0) 121 return label; 122 123 return NULL; 124 } 125 static inline void 126 nfs4_label_release_security(struct nfs4_label *label) 127 { 128 if (label) 129 security_release_secctx(label->label, label->len); 130 } 131 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 132 { 133 if (label) 134 return server->attr_bitmask; 135 136 return server->attr_bitmask_nl; 137 } 138 #else 139 static inline struct nfs4_label * 140 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 141 struct iattr *sattr, struct nfs4_label *l) 142 { return NULL; } 143 static inline void 144 nfs4_label_release_security(struct nfs4_label *label) 145 { return; } 146 static inline u32 * 147 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 148 { return server->attr_bitmask; } 149 #endif 150 151 /* Prevent leaks of NFSv4 errors into userland */ 152 static int nfs4_map_errors(int err) 153 { 154 if (err >= -1000) 155 return err; 156 switch (err) { 157 case -NFS4ERR_RESOURCE: 158 case -NFS4ERR_LAYOUTTRYLATER: 159 case -NFS4ERR_RECALLCONFLICT: 160 return -EREMOTEIO; 161 case -NFS4ERR_WRONGSEC: 162 case -NFS4ERR_WRONG_CRED: 163 return -EPERM; 164 case -NFS4ERR_BADOWNER: 165 case -NFS4ERR_BADNAME: 166 return -EINVAL; 167 case -NFS4ERR_SHARE_DENIED: 168 return -EACCES; 169 case -NFS4ERR_MINOR_VERS_MISMATCH: 170 return -EPROTONOSUPPORT; 171 case -NFS4ERR_FILE_OPEN: 172 return -EBUSY; 173 default: 174 dprintk("%s could not handle NFSv4 error %d\n", 175 __func__, -err); 176 break; 177 } 178 return -EIO; 179 } 180 181 /* 182 * This is our standard bitmap for GETATTR requests. 183 */ 184 const u32 nfs4_fattr_bitmap[3] = { 185 FATTR4_WORD0_TYPE 186 | FATTR4_WORD0_CHANGE 187 | FATTR4_WORD0_SIZE 188 | FATTR4_WORD0_FSID 189 | FATTR4_WORD0_FILEID, 190 FATTR4_WORD1_MODE 191 | FATTR4_WORD1_NUMLINKS 192 | FATTR4_WORD1_OWNER 193 | FATTR4_WORD1_OWNER_GROUP 194 | FATTR4_WORD1_RAWDEV 195 | FATTR4_WORD1_SPACE_USED 196 | FATTR4_WORD1_TIME_ACCESS 197 | FATTR4_WORD1_TIME_METADATA 198 | FATTR4_WORD1_TIME_MODIFY 199 | FATTR4_WORD1_MOUNTED_ON_FILEID, 200 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 201 FATTR4_WORD2_SECURITY_LABEL 202 #endif 203 }; 204 205 static const u32 nfs4_pnfs_open_bitmap[3] = { 206 FATTR4_WORD0_TYPE 207 | FATTR4_WORD0_CHANGE 208 | FATTR4_WORD0_SIZE 209 | FATTR4_WORD0_FSID 210 | FATTR4_WORD0_FILEID, 211 FATTR4_WORD1_MODE 212 | FATTR4_WORD1_NUMLINKS 213 | FATTR4_WORD1_OWNER 214 | FATTR4_WORD1_OWNER_GROUP 215 | FATTR4_WORD1_RAWDEV 216 | FATTR4_WORD1_SPACE_USED 217 | FATTR4_WORD1_TIME_ACCESS 218 | FATTR4_WORD1_TIME_METADATA 219 | FATTR4_WORD1_TIME_MODIFY, 220 FATTR4_WORD2_MDSTHRESHOLD 221 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 222 | FATTR4_WORD2_SECURITY_LABEL 223 #endif 224 }; 225 226 static const u32 nfs4_open_noattr_bitmap[3] = { 227 FATTR4_WORD0_TYPE 228 | FATTR4_WORD0_FILEID, 229 }; 230 231 const u32 nfs4_statfs_bitmap[3] = { 232 FATTR4_WORD0_FILES_AVAIL 233 | FATTR4_WORD0_FILES_FREE 234 | FATTR4_WORD0_FILES_TOTAL, 235 FATTR4_WORD1_SPACE_AVAIL 236 | FATTR4_WORD1_SPACE_FREE 237 | FATTR4_WORD1_SPACE_TOTAL 238 }; 239 240 const u32 nfs4_pathconf_bitmap[3] = { 241 FATTR4_WORD0_MAXLINK 242 | FATTR4_WORD0_MAXNAME, 243 0 244 }; 245 246 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 247 | FATTR4_WORD0_MAXREAD 248 | FATTR4_WORD0_MAXWRITE 249 | FATTR4_WORD0_LEASE_TIME, 250 FATTR4_WORD1_TIME_DELTA 251 | FATTR4_WORD1_FS_LAYOUT_TYPES, 252 FATTR4_WORD2_LAYOUT_BLKSIZE 253 | FATTR4_WORD2_CLONE_BLKSIZE 254 }; 255 256 const u32 nfs4_fs_locations_bitmap[3] = { 257 FATTR4_WORD0_TYPE 258 | FATTR4_WORD0_CHANGE 259 | FATTR4_WORD0_SIZE 260 | FATTR4_WORD0_FSID 261 | FATTR4_WORD0_FILEID 262 | FATTR4_WORD0_FS_LOCATIONS, 263 FATTR4_WORD1_MODE 264 | FATTR4_WORD1_NUMLINKS 265 | FATTR4_WORD1_OWNER 266 | FATTR4_WORD1_OWNER_GROUP 267 | FATTR4_WORD1_RAWDEV 268 | FATTR4_WORD1_SPACE_USED 269 | FATTR4_WORD1_TIME_ACCESS 270 | FATTR4_WORD1_TIME_METADATA 271 | FATTR4_WORD1_TIME_MODIFY 272 | FATTR4_WORD1_MOUNTED_ON_FILEID, 273 }; 274 275 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 276 struct nfs4_readdir_arg *readdir) 277 { 278 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE; 279 __be32 *start, *p; 280 281 if (cookie > 2) { 282 readdir->cookie = cookie; 283 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 284 return; 285 } 286 287 readdir->cookie = 0; 288 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 289 if (cookie == 2) 290 return; 291 292 /* 293 * NFSv4 servers do not return entries for '.' and '..' 294 * Therefore, we fake these entries here. We let '.' 295 * have cookie 0 and '..' have cookie 1. Note that 296 * when talking to the server, we always send cookie 0 297 * instead of 1 or 2. 298 */ 299 start = p = kmap_atomic(*readdir->pages); 300 301 if (cookie == 0) { 302 *p++ = xdr_one; /* next */ 303 *p++ = xdr_zero; /* cookie, first word */ 304 *p++ = xdr_one; /* cookie, second word */ 305 *p++ = xdr_one; /* entry len */ 306 memcpy(p, ".\0\0\0", 4); /* entry */ 307 p++; 308 *p++ = xdr_one; /* bitmap length */ 309 *p++ = htonl(attrs); /* bitmap */ 310 *p++ = htonl(12); /* attribute buffer length */ 311 *p++ = htonl(NF4DIR); 312 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 313 } 314 315 *p++ = xdr_one; /* next */ 316 *p++ = xdr_zero; /* cookie, first word */ 317 *p++ = xdr_two; /* cookie, second word */ 318 *p++ = xdr_two; /* entry len */ 319 memcpy(p, "..\0\0", 4); /* entry */ 320 p++; 321 *p++ = xdr_one; /* bitmap length */ 322 *p++ = htonl(attrs); /* bitmap */ 323 *p++ = htonl(12); /* attribute buffer length */ 324 *p++ = htonl(NF4DIR); 325 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 326 327 readdir->pgbase = (char *)p - (char *)start; 328 readdir->count -= readdir->pgbase; 329 kunmap_atomic(start); 330 } 331 332 static void nfs4_test_and_free_stateid(struct nfs_server *server, 333 nfs4_stateid *stateid, 334 struct rpc_cred *cred) 335 { 336 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 337 338 ops->test_and_free_expired(server, stateid, cred); 339 } 340 341 static void __nfs4_free_revoked_stateid(struct nfs_server *server, 342 nfs4_stateid *stateid, 343 struct rpc_cred *cred) 344 { 345 stateid->type = NFS4_REVOKED_STATEID_TYPE; 346 nfs4_test_and_free_stateid(server, stateid, cred); 347 } 348 349 static void nfs4_free_revoked_stateid(struct nfs_server *server, 350 const nfs4_stateid *stateid, 351 struct rpc_cred *cred) 352 { 353 nfs4_stateid tmp; 354 355 nfs4_stateid_copy(&tmp, stateid); 356 __nfs4_free_revoked_stateid(server, &tmp, cred); 357 } 358 359 static long nfs4_update_delay(long *timeout) 360 { 361 long ret; 362 if (!timeout) 363 return NFS4_POLL_RETRY_MAX; 364 if (*timeout <= 0) 365 *timeout = NFS4_POLL_RETRY_MIN; 366 if (*timeout > NFS4_POLL_RETRY_MAX) 367 *timeout = NFS4_POLL_RETRY_MAX; 368 ret = *timeout; 369 *timeout <<= 1; 370 return ret; 371 } 372 373 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) 374 { 375 int res = 0; 376 377 might_sleep(); 378 379 freezable_schedule_timeout_killable_unsafe( 380 nfs4_update_delay(timeout)); 381 if (fatal_signal_pending(current)) 382 res = -ERESTARTSYS; 383 return res; 384 } 385 386 /* This is the error handling routine for processes that are allowed 387 * to sleep. 388 */ 389 static int nfs4_do_handle_exception(struct nfs_server *server, 390 int errorcode, struct nfs4_exception *exception) 391 { 392 struct nfs_client *clp = server->nfs_client; 393 struct nfs4_state *state = exception->state; 394 const nfs4_stateid *stateid = exception->stateid; 395 struct inode *inode = exception->inode; 396 int ret = errorcode; 397 398 exception->delay = 0; 399 exception->recovering = 0; 400 exception->retry = 0; 401 402 if (stateid == NULL && state != NULL) 403 stateid = &state->stateid; 404 405 switch(errorcode) { 406 case 0: 407 return 0; 408 case -NFS4ERR_DELEG_REVOKED: 409 case -NFS4ERR_ADMIN_REVOKED: 410 case -NFS4ERR_EXPIRED: 411 case -NFS4ERR_BAD_STATEID: 412 if (inode != NULL && stateid != NULL) { 413 nfs_inode_find_state_and_recover(inode, 414 stateid); 415 goto wait_on_recovery; 416 } 417 case -NFS4ERR_OPENMODE: 418 if (inode) { 419 int err; 420 421 err = nfs_async_inode_return_delegation(inode, 422 stateid); 423 if (err == 0) 424 goto wait_on_recovery; 425 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { 426 exception->retry = 1; 427 break; 428 } 429 } 430 if (state == NULL) 431 break; 432 ret = nfs4_schedule_stateid_recovery(server, state); 433 if (ret < 0) 434 break; 435 goto wait_on_recovery; 436 case -NFS4ERR_STALE_STATEID: 437 case -NFS4ERR_STALE_CLIENTID: 438 nfs4_schedule_lease_recovery(clp); 439 goto wait_on_recovery; 440 case -NFS4ERR_MOVED: 441 ret = nfs4_schedule_migration_recovery(server); 442 if (ret < 0) 443 break; 444 goto wait_on_recovery; 445 case -NFS4ERR_LEASE_MOVED: 446 nfs4_schedule_lease_moved_recovery(clp); 447 goto wait_on_recovery; 448 #if defined(CONFIG_NFS_V4_1) 449 case -NFS4ERR_BADSESSION: 450 case -NFS4ERR_BADSLOT: 451 case -NFS4ERR_BAD_HIGH_SLOT: 452 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 453 case -NFS4ERR_DEADSESSION: 454 case -NFS4ERR_SEQ_FALSE_RETRY: 455 case -NFS4ERR_SEQ_MISORDERED: 456 dprintk("%s ERROR: %d Reset session\n", __func__, 457 errorcode); 458 nfs4_schedule_session_recovery(clp->cl_session, errorcode); 459 goto wait_on_recovery; 460 #endif /* defined(CONFIG_NFS_V4_1) */ 461 case -NFS4ERR_FILE_OPEN: 462 if (exception->timeout > HZ) { 463 /* We have retried a decent amount, time to 464 * fail 465 */ 466 ret = -EBUSY; 467 break; 468 } 469 case -NFS4ERR_DELAY: 470 nfs_inc_server_stats(server, NFSIOS_DELAY); 471 case -NFS4ERR_GRACE: 472 case -NFS4ERR_LAYOUTTRYLATER: 473 case -NFS4ERR_RECALLCONFLICT: 474 exception->delay = 1; 475 return 0; 476 477 case -NFS4ERR_RETRY_UNCACHED_REP: 478 case -NFS4ERR_OLD_STATEID: 479 exception->retry = 1; 480 break; 481 case -NFS4ERR_BADOWNER: 482 /* The following works around a Linux server bug! */ 483 case -NFS4ERR_BADNAME: 484 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 485 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 486 exception->retry = 1; 487 printk(KERN_WARNING "NFS: v4 server %s " 488 "does not accept raw " 489 "uid/gids. " 490 "Reenabling the idmapper.\n", 491 server->nfs_client->cl_hostname); 492 } 493 } 494 /* We failed to handle the error */ 495 return nfs4_map_errors(ret); 496 wait_on_recovery: 497 exception->recovering = 1; 498 return 0; 499 } 500 501 /* This is the error handling routine for processes that are allowed 502 * to sleep. 503 */ 504 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 505 { 506 struct nfs_client *clp = server->nfs_client; 507 int ret; 508 509 ret = nfs4_do_handle_exception(server, errorcode, exception); 510 if (exception->delay) { 511 ret = nfs4_delay(server->client, &exception->timeout); 512 goto out_retry; 513 } 514 if (exception->recovering) { 515 ret = nfs4_wait_clnt_recover(clp); 516 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 517 return -EIO; 518 goto out_retry; 519 } 520 return ret; 521 out_retry: 522 if (ret == 0) 523 exception->retry = 1; 524 return ret; 525 } 526 527 static int 528 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 529 int errorcode, struct nfs4_exception *exception) 530 { 531 struct nfs_client *clp = server->nfs_client; 532 int ret; 533 534 ret = nfs4_do_handle_exception(server, errorcode, exception); 535 if (exception->delay) { 536 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 537 goto out_retry; 538 } 539 if (exception->recovering) { 540 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 541 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 542 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 543 goto out_retry; 544 } 545 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 546 ret = -EIO; 547 return ret; 548 out_retry: 549 if (ret == 0) 550 exception->retry = 1; 551 return ret; 552 } 553 554 static int 555 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 556 struct nfs4_state *state, long *timeout) 557 { 558 struct nfs4_exception exception = { 559 .state = state, 560 }; 561 562 if (task->tk_status >= 0) 563 return 0; 564 if (timeout) 565 exception.timeout = *timeout; 566 task->tk_status = nfs4_async_handle_exception(task, server, 567 task->tk_status, 568 &exception); 569 if (exception.delay && timeout) 570 *timeout = exception.timeout; 571 if (exception.retry) 572 return -EAGAIN; 573 return 0; 574 } 575 576 /* 577 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 578 * or 'false' otherwise. 579 */ 580 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 581 { 582 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 583 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P); 584 } 585 586 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 587 { 588 spin_lock(&clp->cl_lock); 589 if (time_before(clp->cl_last_renewal,timestamp)) 590 clp->cl_last_renewal = timestamp; 591 spin_unlock(&clp->cl_lock); 592 } 593 594 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 595 { 596 struct nfs_client *clp = server->nfs_client; 597 598 if (!nfs4_has_session(clp)) 599 do_renew_lease(clp, timestamp); 600 } 601 602 struct nfs4_call_sync_data { 603 const struct nfs_server *seq_server; 604 struct nfs4_sequence_args *seq_args; 605 struct nfs4_sequence_res *seq_res; 606 }; 607 608 void nfs4_init_sequence(struct nfs4_sequence_args *args, 609 struct nfs4_sequence_res *res, int cache_reply) 610 { 611 args->sa_slot = NULL; 612 args->sa_cache_this = cache_reply; 613 args->sa_privileged = 0; 614 615 res->sr_slot = NULL; 616 } 617 618 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args) 619 { 620 args->sa_privileged = 1; 621 } 622 623 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 624 { 625 struct nfs4_slot *slot = res->sr_slot; 626 struct nfs4_slot_table *tbl; 627 628 tbl = slot->table; 629 spin_lock(&tbl->slot_tbl_lock); 630 if (!nfs41_wake_and_assign_slot(tbl, slot)) 631 nfs4_free_slot(tbl, slot); 632 spin_unlock(&tbl->slot_tbl_lock); 633 634 res->sr_slot = NULL; 635 } 636 637 static int nfs40_sequence_done(struct rpc_task *task, 638 struct nfs4_sequence_res *res) 639 { 640 if (res->sr_slot != NULL) 641 nfs40_sequence_free_slot(res); 642 return 1; 643 } 644 645 #if defined(CONFIG_NFS_V4_1) 646 647 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 648 { 649 struct nfs4_session *session; 650 struct nfs4_slot_table *tbl; 651 struct nfs4_slot *slot = res->sr_slot; 652 bool send_new_highest_used_slotid = false; 653 654 tbl = slot->table; 655 session = tbl->session; 656 657 /* Bump the slot sequence number */ 658 if (slot->seq_done) 659 slot->seq_nr++; 660 slot->seq_done = 0; 661 662 spin_lock(&tbl->slot_tbl_lock); 663 /* Be nice to the server: try to ensure that the last transmitted 664 * value for highest_user_slotid <= target_highest_slotid 665 */ 666 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 667 send_new_highest_used_slotid = true; 668 669 if (nfs41_wake_and_assign_slot(tbl, slot)) { 670 send_new_highest_used_slotid = false; 671 goto out_unlock; 672 } 673 nfs4_free_slot(tbl, slot); 674 675 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 676 send_new_highest_used_slotid = false; 677 out_unlock: 678 spin_unlock(&tbl->slot_tbl_lock); 679 res->sr_slot = NULL; 680 if (send_new_highest_used_slotid) 681 nfs41_notify_server(session->clp); 682 if (waitqueue_active(&tbl->slot_waitq)) 683 wake_up_all(&tbl->slot_waitq); 684 } 685 686 static int nfs41_sequence_process(struct rpc_task *task, 687 struct nfs4_sequence_res *res) 688 { 689 struct nfs4_session *session; 690 struct nfs4_slot *slot = res->sr_slot; 691 struct nfs_client *clp; 692 bool interrupted = false; 693 int ret = 1; 694 695 if (slot == NULL) 696 goto out_noaction; 697 /* don't increment the sequence number if the task wasn't sent */ 698 if (!RPC_WAS_SENT(task)) 699 goto out; 700 701 session = slot->table->session; 702 703 if (slot->interrupted) { 704 if (res->sr_status != -NFS4ERR_DELAY) 705 slot->interrupted = 0; 706 interrupted = true; 707 } 708 709 trace_nfs4_sequence_done(session, res); 710 /* Check the SEQUENCE operation status */ 711 switch (res->sr_status) { 712 case 0: 713 /* If previous op on slot was interrupted and we reused 714 * the seq# and got a reply from the cache, then retry 715 */ 716 if (task->tk_status == -EREMOTEIO && interrupted) { 717 ++slot->seq_nr; 718 goto retry_nowait; 719 } 720 /* Update the slot's sequence and clientid lease timer */ 721 slot->seq_done = 1; 722 clp = session->clp; 723 do_renew_lease(clp, res->sr_timestamp); 724 /* Check sequence flags */ 725 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 726 !!slot->privileged); 727 nfs41_update_target_slotid(slot->table, slot, res); 728 break; 729 case 1: 730 /* 731 * sr_status remains 1 if an RPC level error occurred. 732 * The server may or may not have processed the sequence 733 * operation.. 734 * Mark the slot as having hosted an interrupted RPC call. 735 */ 736 slot->interrupted = 1; 737 goto out; 738 case -NFS4ERR_DELAY: 739 /* The server detected a resend of the RPC call and 740 * returned NFS4ERR_DELAY as per Section 2.10.6.2 741 * of RFC5661. 742 */ 743 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 744 __func__, 745 slot->slot_nr, 746 slot->seq_nr); 747 goto out_retry; 748 case -NFS4ERR_BADSLOT: 749 /* 750 * The slot id we used was probably retired. Try again 751 * using a different slot id. 752 */ 753 goto retry_nowait; 754 case -NFS4ERR_SEQ_MISORDERED: 755 /* 756 * Was the last operation on this sequence interrupted? 757 * If so, retry after bumping the sequence number. 758 */ 759 if (interrupted) { 760 ++slot->seq_nr; 761 goto retry_nowait; 762 } 763 /* 764 * Could this slot have been previously retired? 765 * If so, then the server may be expecting seq_nr = 1! 766 */ 767 if (slot->seq_nr != 1) { 768 slot->seq_nr = 1; 769 goto retry_nowait; 770 } 771 break; 772 case -NFS4ERR_SEQ_FALSE_RETRY: 773 ++slot->seq_nr; 774 goto retry_nowait; 775 default: 776 /* Just update the slot sequence no. */ 777 slot->seq_done = 1; 778 } 779 out: 780 /* The session may be reset by one of the error handlers. */ 781 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 782 out_noaction: 783 return ret; 784 retry_nowait: 785 if (rpc_restart_call_prepare(task)) { 786 nfs41_sequence_free_slot(res); 787 task->tk_status = 0; 788 ret = 0; 789 } 790 goto out; 791 out_retry: 792 if (!rpc_restart_call(task)) 793 goto out; 794 rpc_delay(task, NFS4_POLL_RETRY_MAX); 795 return 0; 796 } 797 798 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 799 { 800 if (!nfs41_sequence_process(task, res)) 801 return 0; 802 if (res->sr_slot != NULL) 803 nfs41_sequence_free_slot(res); 804 return 1; 805 806 } 807 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 808 809 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 810 { 811 if (res->sr_slot == NULL) 812 return 1; 813 if (res->sr_slot->table->session != NULL) 814 return nfs41_sequence_process(task, res); 815 return nfs40_sequence_done(task, res); 816 } 817 818 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 819 { 820 if (res->sr_slot != NULL) { 821 if (res->sr_slot->table->session != NULL) 822 nfs41_sequence_free_slot(res); 823 else 824 nfs40_sequence_free_slot(res); 825 } 826 } 827 828 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 829 { 830 if (res->sr_slot == NULL) 831 return 1; 832 if (!res->sr_slot->table->session) 833 return nfs40_sequence_done(task, res); 834 return nfs41_sequence_done(task, res); 835 } 836 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 837 838 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 839 { 840 struct nfs4_call_sync_data *data = calldata; 841 842 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 843 844 nfs4_setup_sequence(data->seq_server->nfs_client, 845 data->seq_args, data->seq_res, task); 846 } 847 848 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 849 { 850 struct nfs4_call_sync_data *data = calldata; 851 852 nfs41_sequence_done(task, data->seq_res); 853 } 854 855 static const struct rpc_call_ops nfs41_call_sync_ops = { 856 .rpc_call_prepare = nfs41_call_sync_prepare, 857 .rpc_call_done = nfs41_call_sync_done, 858 }; 859 860 #else /* !CONFIG_NFS_V4_1 */ 861 862 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 863 { 864 return nfs40_sequence_done(task, res); 865 } 866 867 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 868 { 869 if (res->sr_slot != NULL) 870 nfs40_sequence_free_slot(res); 871 } 872 873 int nfs4_sequence_done(struct rpc_task *task, 874 struct nfs4_sequence_res *res) 875 { 876 return nfs40_sequence_done(task, res); 877 } 878 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 879 880 #endif /* !CONFIG_NFS_V4_1 */ 881 882 int nfs4_setup_sequence(const struct nfs_client *client, 883 struct nfs4_sequence_args *args, 884 struct nfs4_sequence_res *res, 885 struct rpc_task *task) 886 { 887 struct nfs4_session *session = nfs4_get_session(client); 888 struct nfs4_slot_table *tbl = client->cl_slot_tbl; 889 struct nfs4_slot *slot; 890 891 /* slot already allocated? */ 892 if (res->sr_slot != NULL) 893 goto out_start; 894 895 if (session) { 896 tbl = &session->fc_slot_table; 897 task->tk_timeout = 0; 898 } 899 900 spin_lock(&tbl->slot_tbl_lock); 901 /* The state manager will wait until the slot table is empty */ 902 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 903 goto out_sleep; 904 905 slot = nfs4_alloc_slot(tbl); 906 if (IS_ERR(slot)) { 907 /* Try again in 1/4 second */ 908 if (slot == ERR_PTR(-ENOMEM)) 909 task->tk_timeout = HZ >> 2; 910 goto out_sleep; 911 } 912 spin_unlock(&tbl->slot_tbl_lock); 913 914 slot->privileged = args->sa_privileged ? 1 : 0; 915 args->sa_slot = slot; 916 917 res->sr_slot = slot; 918 if (session) { 919 res->sr_timestamp = jiffies; 920 res->sr_status_flags = 0; 921 res->sr_status = 1; 922 } 923 924 trace_nfs4_setup_sequence(session, args); 925 out_start: 926 rpc_call_start(task); 927 return 0; 928 929 out_sleep: 930 if (args->sa_privileged) 931 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 932 NULL, RPC_PRIORITY_PRIVILEGED); 933 else 934 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 935 spin_unlock(&tbl->slot_tbl_lock); 936 return -EAGAIN; 937 } 938 EXPORT_SYMBOL_GPL(nfs4_setup_sequence); 939 940 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 941 { 942 struct nfs4_call_sync_data *data = calldata; 943 nfs4_setup_sequence(data->seq_server->nfs_client, 944 data->seq_args, data->seq_res, task); 945 } 946 947 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 948 { 949 struct nfs4_call_sync_data *data = calldata; 950 nfs4_sequence_done(task, data->seq_res); 951 } 952 953 static const struct rpc_call_ops nfs40_call_sync_ops = { 954 .rpc_call_prepare = nfs40_call_sync_prepare, 955 .rpc_call_done = nfs40_call_sync_done, 956 }; 957 958 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 959 struct nfs_server *server, 960 struct rpc_message *msg, 961 struct nfs4_sequence_args *args, 962 struct nfs4_sequence_res *res) 963 { 964 int ret; 965 struct rpc_task *task; 966 struct nfs_client *clp = server->nfs_client; 967 struct nfs4_call_sync_data data = { 968 .seq_server = server, 969 .seq_args = args, 970 .seq_res = res, 971 }; 972 struct rpc_task_setup task_setup = { 973 .rpc_client = clnt, 974 .rpc_message = msg, 975 .callback_ops = clp->cl_mvops->call_sync_ops, 976 .callback_data = &data 977 }; 978 979 task = rpc_run_task(&task_setup); 980 if (IS_ERR(task)) 981 ret = PTR_ERR(task); 982 else { 983 ret = task->tk_status; 984 rpc_put_task(task); 985 } 986 return ret; 987 } 988 989 int nfs4_call_sync(struct rpc_clnt *clnt, 990 struct nfs_server *server, 991 struct rpc_message *msg, 992 struct nfs4_sequence_args *args, 993 struct nfs4_sequence_res *res, 994 int cache_reply) 995 { 996 nfs4_init_sequence(args, res, cache_reply); 997 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 998 } 999 1000 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo, 1001 unsigned long timestamp) 1002 { 1003 struct nfs_inode *nfsi = NFS_I(dir); 1004 1005 spin_lock(&dir->i_lock); 1006 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; 1007 if (cinfo->atomic && cinfo->before == dir->i_version) { 1008 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE; 1009 nfsi->attrtimeo_timestamp = jiffies; 1010 } else { 1011 nfs_force_lookup_revalidate(dir); 1012 if (cinfo->before != dir->i_version) 1013 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS | 1014 NFS_INO_INVALID_ACL; 1015 } 1016 dir->i_version = cinfo->after; 1017 nfsi->read_cache_jiffies = timestamp; 1018 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1019 nfs_fscache_invalidate(dir); 1020 spin_unlock(&dir->i_lock); 1021 } 1022 1023 struct nfs4_opendata { 1024 struct kref kref; 1025 struct nfs_openargs o_arg; 1026 struct nfs_openres o_res; 1027 struct nfs_open_confirmargs c_arg; 1028 struct nfs_open_confirmres c_res; 1029 struct nfs4_string owner_name; 1030 struct nfs4_string group_name; 1031 struct nfs4_label *a_label; 1032 struct nfs_fattr f_attr; 1033 struct nfs4_label *f_label; 1034 struct dentry *dir; 1035 struct dentry *dentry; 1036 struct nfs4_state_owner *owner; 1037 struct nfs4_state *state; 1038 struct iattr attrs; 1039 unsigned long timestamp; 1040 bool rpc_done; 1041 bool file_created; 1042 bool is_recover; 1043 bool cancelled; 1044 int rpc_status; 1045 }; 1046 1047 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1048 int err, struct nfs4_exception *exception) 1049 { 1050 if (err != -EINVAL) 1051 return false; 1052 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1053 return false; 1054 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1055 exception->retry = 1; 1056 return true; 1057 } 1058 1059 static u32 1060 nfs4_map_atomic_open_share(struct nfs_server *server, 1061 fmode_t fmode, int openflags) 1062 { 1063 u32 res = 0; 1064 1065 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1066 case FMODE_READ: 1067 res = NFS4_SHARE_ACCESS_READ; 1068 break; 1069 case FMODE_WRITE: 1070 res = NFS4_SHARE_ACCESS_WRITE; 1071 break; 1072 case FMODE_READ|FMODE_WRITE: 1073 res = NFS4_SHARE_ACCESS_BOTH; 1074 } 1075 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1076 goto out; 1077 /* Want no delegation if we're using O_DIRECT */ 1078 if (openflags & O_DIRECT) 1079 res |= NFS4_SHARE_WANT_NO_DELEG; 1080 out: 1081 return res; 1082 } 1083 1084 static enum open_claim_type4 1085 nfs4_map_atomic_open_claim(struct nfs_server *server, 1086 enum open_claim_type4 claim) 1087 { 1088 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1089 return claim; 1090 switch (claim) { 1091 default: 1092 return claim; 1093 case NFS4_OPEN_CLAIM_FH: 1094 return NFS4_OPEN_CLAIM_NULL; 1095 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1096 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1097 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1098 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1099 } 1100 } 1101 1102 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1103 { 1104 p->o_res.f_attr = &p->f_attr; 1105 p->o_res.f_label = p->f_label; 1106 p->o_res.seqid = p->o_arg.seqid; 1107 p->c_res.seqid = p->c_arg.seqid; 1108 p->o_res.server = p->o_arg.server; 1109 p->o_res.access_request = p->o_arg.access; 1110 nfs_fattr_init(&p->f_attr); 1111 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1112 } 1113 1114 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1115 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1116 const struct iattr *attrs, 1117 struct nfs4_label *label, 1118 enum open_claim_type4 claim, 1119 gfp_t gfp_mask) 1120 { 1121 struct dentry *parent = dget_parent(dentry); 1122 struct inode *dir = d_inode(parent); 1123 struct nfs_server *server = NFS_SERVER(dir); 1124 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1125 struct nfs4_opendata *p; 1126 1127 p = kzalloc(sizeof(*p), gfp_mask); 1128 if (p == NULL) 1129 goto err; 1130 1131 p->f_label = nfs4_label_alloc(server, gfp_mask); 1132 if (IS_ERR(p->f_label)) 1133 goto err_free_p; 1134 1135 p->a_label = nfs4_label_alloc(server, gfp_mask); 1136 if (IS_ERR(p->a_label)) 1137 goto err_free_f; 1138 1139 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1140 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1141 if (IS_ERR(p->o_arg.seqid)) 1142 goto err_free_label; 1143 nfs_sb_active(dentry->d_sb); 1144 p->dentry = dget(dentry); 1145 p->dir = parent; 1146 p->owner = sp; 1147 atomic_inc(&sp->so_count); 1148 p->o_arg.open_flags = flags; 1149 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1150 p->o_arg.umask = current_umask(); 1151 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1152 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1153 fmode, flags); 1154 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS 1155 * will return permission denied for all bits until close */ 1156 if (!(flags & O_EXCL)) { 1157 /* ask server to check for all possible rights as results 1158 * are cached */ 1159 switch (p->o_arg.claim) { 1160 default: 1161 break; 1162 case NFS4_OPEN_CLAIM_NULL: 1163 case NFS4_OPEN_CLAIM_FH: 1164 p->o_arg.access = NFS4_ACCESS_READ | 1165 NFS4_ACCESS_MODIFY | 1166 NFS4_ACCESS_EXTEND | 1167 NFS4_ACCESS_EXECUTE; 1168 } 1169 } 1170 p->o_arg.clientid = server->nfs_client->cl_clientid; 1171 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1172 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1173 p->o_arg.name = &dentry->d_name; 1174 p->o_arg.server = server; 1175 p->o_arg.bitmask = nfs4_bitmask(server, label); 1176 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1177 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1178 switch (p->o_arg.claim) { 1179 case NFS4_OPEN_CLAIM_NULL: 1180 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1181 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1182 p->o_arg.fh = NFS_FH(dir); 1183 break; 1184 case NFS4_OPEN_CLAIM_PREVIOUS: 1185 case NFS4_OPEN_CLAIM_FH: 1186 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1187 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1188 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1189 } 1190 if (attrs != NULL && attrs->ia_valid != 0) { 1191 __u32 verf[2]; 1192 1193 p->o_arg.u.attrs = &p->attrs; 1194 memcpy(&p->attrs, attrs, sizeof(p->attrs)); 1195 1196 verf[0] = jiffies; 1197 verf[1] = current->pid; 1198 memcpy(p->o_arg.u.verifier.data, verf, 1199 sizeof(p->o_arg.u.verifier.data)); 1200 } 1201 p->c_arg.fh = &p->o_res.fh; 1202 p->c_arg.stateid = &p->o_res.stateid; 1203 p->c_arg.seqid = p->o_arg.seqid; 1204 nfs4_init_opendata_res(p); 1205 kref_init(&p->kref); 1206 return p; 1207 1208 err_free_label: 1209 nfs4_label_free(p->a_label); 1210 err_free_f: 1211 nfs4_label_free(p->f_label); 1212 err_free_p: 1213 kfree(p); 1214 err: 1215 dput(parent); 1216 return NULL; 1217 } 1218 1219 static void nfs4_opendata_free(struct kref *kref) 1220 { 1221 struct nfs4_opendata *p = container_of(kref, 1222 struct nfs4_opendata, kref); 1223 struct super_block *sb = p->dentry->d_sb; 1224 1225 nfs_free_seqid(p->o_arg.seqid); 1226 nfs4_sequence_free_slot(&p->o_res.seq_res); 1227 if (p->state != NULL) 1228 nfs4_put_open_state(p->state); 1229 nfs4_put_state_owner(p->owner); 1230 1231 nfs4_label_free(p->a_label); 1232 nfs4_label_free(p->f_label); 1233 1234 dput(p->dir); 1235 dput(p->dentry); 1236 nfs_sb_deactive(sb); 1237 nfs_fattr_free_names(&p->f_attr); 1238 kfree(p->f_attr.mdsthreshold); 1239 kfree(p); 1240 } 1241 1242 static void nfs4_opendata_put(struct nfs4_opendata *p) 1243 { 1244 if (p != NULL) 1245 kref_put(&p->kref, nfs4_opendata_free); 1246 } 1247 1248 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1249 fmode_t fmode) 1250 { 1251 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1252 case FMODE_READ|FMODE_WRITE: 1253 return state->n_rdwr != 0; 1254 case FMODE_WRITE: 1255 return state->n_wronly != 0; 1256 case FMODE_READ: 1257 return state->n_rdonly != 0; 1258 } 1259 WARN_ON_ONCE(1); 1260 return false; 1261 } 1262 1263 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) 1264 { 1265 int ret = 0; 1266 1267 if (open_mode & (O_EXCL|O_TRUNC)) 1268 goto out; 1269 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1270 case FMODE_READ: 1271 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1272 && state->n_rdonly != 0; 1273 break; 1274 case FMODE_WRITE: 1275 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1276 && state->n_wronly != 0; 1277 break; 1278 case FMODE_READ|FMODE_WRITE: 1279 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1280 && state->n_rdwr != 0; 1281 } 1282 out: 1283 return ret; 1284 } 1285 1286 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1287 enum open_claim_type4 claim) 1288 { 1289 if (delegation == NULL) 1290 return 0; 1291 if ((delegation->type & fmode) != fmode) 1292 return 0; 1293 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) 1294 return 0; 1295 switch (claim) { 1296 case NFS4_OPEN_CLAIM_NULL: 1297 case NFS4_OPEN_CLAIM_FH: 1298 break; 1299 case NFS4_OPEN_CLAIM_PREVIOUS: 1300 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1301 break; 1302 default: 1303 return 0; 1304 } 1305 nfs_mark_delegation_referenced(delegation); 1306 return 1; 1307 } 1308 1309 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1310 { 1311 switch (fmode) { 1312 case FMODE_WRITE: 1313 state->n_wronly++; 1314 break; 1315 case FMODE_READ: 1316 state->n_rdonly++; 1317 break; 1318 case FMODE_READ|FMODE_WRITE: 1319 state->n_rdwr++; 1320 } 1321 nfs4_state_set_mode_locked(state, state->state | fmode); 1322 } 1323 1324 #ifdef CONFIG_NFS_V4_1 1325 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1326 { 1327 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1328 return true; 1329 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1330 return true; 1331 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1332 return true; 1333 return false; 1334 } 1335 #endif /* CONFIG_NFS_V4_1 */ 1336 1337 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1338 { 1339 struct nfs_client *clp = state->owner->so_server->nfs_client; 1340 bool need_recover = false; 1341 1342 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1343 need_recover = true; 1344 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1345 need_recover = true; 1346 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1347 need_recover = true; 1348 if (need_recover) 1349 nfs4_state_mark_reclaim_nograce(clp, state); 1350 } 1351 1352 static bool nfs_need_update_open_stateid(struct nfs4_state *state, 1353 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1354 { 1355 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0) 1356 return true; 1357 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1358 nfs4_stateid_copy(freeme, &state->open_stateid); 1359 nfs_test_and_clear_all_open_stateid(state); 1360 return true; 1361 } 1362 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) 1363 return true; 1364 return false; 1365 } 1366 1367 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1368 { 1369 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1370 return; 1371 if (state->n_wronly) 1372 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1373 if (state->n_rdonly) 1374 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1375 if (state->n_rdwr) 1376 set_bit(NFS_O_RDWR_STATE, &state->flags); 1377 set_bit(NFS_OPEN_STATE, &state->flags); 1378 } 1379 1380 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1381 nfs4_stateid *stateid, fmode_t fmode) 1382 { 1383 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1384 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1385 case FMODE_WRITE: 1386 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1387 break; 1388 case FMODE_READ: 1389 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1390 break; 1391 case 0: 1392 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1393 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1394 clear_bit(NFS_OPEN_STATE, &state->flags); 1395 } 1396 if (stateid == NULL) 1397 return; 1398 /* Handle OPEN+OPEN_DOWNGRADE races */ 1399 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1400 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1401 nfs_resync_open_stateid_locked(state); 1402 return; 1403 } 1404 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1405 nfs4_stateid_copy(&state->stateid, stateid); 1406 nfs4_stateid_copy(&state->open_stateid, stateid); 1407 } 1408 1409 static void nfs_clear_open_stateid(struct nfs4_state *state, 1410 nfs4_stateid *arg_stateid, 1411 nfs4_stateid *stateid, fmode_t fmode) 1412 { 1413 write_seqlock(&state->seqlock); 1414 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1415 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1416 nfs_clear_open_stateid_locked(state, stateid, fmode); 1417 write_sequnlock(&state->seqlock); 1418 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1419 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1420 } 1421 1422 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1423 const nfs4_stateid *stateid, fmode_t fmode, 1424 nfs4_stateid *freeme) 1425 { 1426 switch (fmode) { 1427 case FMODE_READ: 1428 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1429 break; 1430 case FMODE_WRITE: 1431 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1432 break; 1433 case FMODE_READ|FMODE_WRITE: 1434 set_bit(NFS_O_RDWR_STATE, &state->flags); 1435 } 1436 if (!nfs_need_update_open_stateid(state, stateid, freeme)) 1437 return; 1438 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1439 nfs4_stateid_copy(&state->stateid, stateid); 1440 nfs4_stateid_copy(&state->open_stateid, stateid); 1441 } 1442 1443 static void __update_open_stateid(struct nfs4_state *state, 1444 const nfs4_stateid *open_stateid, 1445 const nfs4_stateid *deleg_stateid, 1446 fmode_t fmode, 1447 nfs4_stateid *freeme) 1448 { 1449 /* 1450 * Protect the call to nfs4_state_set_mode_locked and 1451 * serialise the stateid update 1452 */ 1453 spin_lock(&state->owner->so_lock); 1454 write_seqlock(&state->seqlock); 1455 if (deleg_stateid != NULL) { 1456 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1457 set_bit(NFS_DELEGATED_STATE, &state->flags); 1458 } 1459 if (open_stateid != NULL) 1460 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme); 1461 write_sequnlock(&state->seqlock); 1462 update_open_stateflags(state, fmode); 1463 spin_unlock(&state->owner->so_lock); 1464 } 1465 1466 static int update_open_stateid(struct nfs4_state *state, 1467 const nfs4_stateid *open_stateid, 1468 const nfs4_stateid *delegation, 1469 fmode_t fmode) 1470 { 1471 struct nfs_server *server = NFS_SERVER(state->inode); 1472 struct nfs_client *clp = server->nfs_client; 1473 struct nfs_inode *nfsi = NFS_I(state->inode); 1474 struct nfs_delegation *deleg_cur; 1475 nfs4_stateid freeme = { }; 1476 int ret = 0; 1477 1478 fmode &= (FMODE_READ|FMODE_WRITE); 1479 1480 rcu_read_lock(); 1481 deleg_cur = rcu_dereference(nfsi->delegation); 1482 if (deleg_cur == NULL) 1483 goto no_delegation; 1484 1485 spin_lock(&deleg_cur->lock); 1486 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1487 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1488 (deleg_cur->type & fmode) != fmode) 1489 goto no_delegation_unlock; 1490 1491 if (delegation == NULL) 1492 delegation = &deleg_cur->stateid; 1493 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation)) 1494 goto no_delegation_unlock; 1495 1496 nfs_mark_delegation_referenced(deleg_cur); 1497 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, 1498 fmode, &freeme); 1499 ret = 1; 1500 no_delegation_unlock: 1501 spin_unlock(&deleg_cur->lock); 1502 no_delegation: 1503 rcu_read_unlock(); 1504 1505 if (!ret && open_stateid != NULL) { 1506 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme); 1507 ret = 1; 1508 } 1509 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1510 nfs4_schedule_state_manager(clp); 1511 if (freeme.type != 0) 1512 nfs4_test_and_free_stateid(server, &freeme, 1513 state->owner->so_cred); 1514 1515 return ret; 1516 } 1517 1518 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1519 const nfs4_stateid *stateid) 1520 { 1521 struct nfs4_state *state = lsp->ls_state; 1522 bool ret = false; 1523 1524 spin_lock(&state->state_lock); 1525 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1526 goto out_noupdate; 1527 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1528 goto out_noupdate; 1529 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1530 ret = true; 1531 out_noupdate: 1532 spin_unlock(&state->state_lock); 1533 return ret; 1534 } 1535 1536 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1537 { 1538 struct nfs_delegation *delegation; 1539 1540 rcu_read_lock(); 1541 delegation = rcu_dereference(NFS_I(inode)->delegation); 1542 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1543 rcu_read_unlock(); 1544 return; 1545 } 1546 rcu_read_unlock(); 1547 nfs4_inode_return_delegation(inode); 1548 } 1549 1550 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1551 { 1552 struct nfs4_state *state = opendata->state; 1553 struct nfs_inode *nfsi = NFS_I(state->inode); 1554 struct nfs_delegation *delegation; 1555 int open_mode = opendata->o_arg.open_flags; 1556 fmode_t fmode = opendata->o_arg.fmode; 1557 enum open_claim_type4 claim = opendata->o_arg.claim; 1558 nfs4_stateid stateid; 1559 int ret = -EAGAIN; 1560 1561 for (;;) { 1562 spin_lock(&state->owner->so_lock); 1563 if (can_open_cached(state, fmode, open_mode)) { 1564 update_open_stateflags(state, fmode); 1565 spin_unlock(&state->owner->so_lock); 1566 goto out_return_state; 1567 } 1568 spin_unlock(&state->owner->so_lock); 1569 rcu_read_lock(); 1570 delegation = rcu_dereference(nfsi->delegation); 1571 if (!can_open_delegated(delegation, fmode, claim)) { 1572 rcu_read_unlock(); 1573 break; 1574 } 1575 /* Save the delegation */ 1576 nfs4_stateid_copy(&stateid, &delegation->stateid); 1577 rcu_read_unlock(); 1578 nfs_release_seqid(opendata->o_arg.seqid); 1579 if (!opendata->is_recover) { 1580 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1581 if (ret != 0) 1582 goto out; 1583 } 1584 ret = -EAGAIN; 1585 1586 /* Try to update the stateid using the delegation */ 1587 if (update_open_stateid(state, NULL, &stateid, fmode)) 1588 goto out_return_state; 1589 } 1590 out: 1591 return ERR_PTR(ret); 1592 out_return_state: 1593 atomic_inc(&state->count); 1594 return state; 1595 } 1596 1597 static void 1598 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1599 { 1600 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1601 struct nfs_delegation *delegation; 1602 int delegation_flags = 0; 1603 1604 rcu_read_lock(); 1605 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1606 if (delegation) 1607 delegation_flags = delegation->flags; 1608 rcu_read_unlock(); 1609 switch (data->o_arg.claim) { 1610 default: 1611 break; 1612 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1613 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1614 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1615 "returning a delegation for " 1616 "OPEN(CLAIM_DELEGATE_CUR)\n", 1617 clp->cl_hostname); 1618 return; 1619 } 1620 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1621 nfs_inode_set_delegation(state->inode, 1622 data->owner->so_cred, 1623 &data->o_res); 1624 else 1625 nfs_inode_reclaim_delegation(state->inode, 1626 data->owner->so_cred, 1627 &data->o_res); 1628 } 1629 1630 /* 1631 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1632 * and update the nfs4_state. 1633 */ 1634 static struct nfs4_state * 1635 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1636 { 1637 struct inode *inode = data->state->inode; 1638 struct nfs4_state *state = data->state; 1639 int ret; 1640 1641 if (!data->rpc_done) { 1642 if (data->rpc_status) 1643 return ERR_PTR(data->rpc_status); 1644 /* cached opens have already been processed */ 1645 goto update; 1646 } 1647 1648 ret = nfs_refresh_inode(inode, &data->f_attr); 1649 if (ret) 1650 return ERR_PTR(ret); 1651 1652 if (data->o_res.delegation_type != 0) 1653 nfs4_opendata_check_deleg(data, state); 1654 update: 1655 update_open_stateid(state, &data->o_res.stateid, NULL, 1656 data->o_arg.fmode); 1657 atomic_inc(&state->count); 1658 1659 return state; 1660 } 1661 1662 static struct nfs4_state * 1663 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1664 { 1665 struct inode *inode; 1666 struct nfs4_state *state = NULL; 1667 int ret; 1668 1669 if (!data->rpc_done) { 1670 state = nfs4_try_open_cached(data); 1671 trace_nfs4_cached_open(data->state); 1672 goto out; 1673 } 1674 1675 ret = -EAGAIN; 1676 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 1677 goto err; 1678 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label); 1679 ret = PTR_ERR(inode); 1680 if (IS_ERR(inode)) 1681 goto err; 1682 ret = -ENOMEM; 1683 state = nfs4_get_open_state(inode, data->owner); 1684 if (state == NULL) 1685 goto err_put_inode; 1686 if (data->o_res.delegation_type != 0) 1687 nfs4_opendata_check_deleg(data, state); 1688 update_open_stateid(state, &data->o_res.stateid, NULL, 1689 data->o_arg.fmode); 1690 iput(inode); 1691 out: 1692 nfs_release_seqid(data->o_arg.seqid); 1693 return state; 1694 err_put_inode: 1695 iput(inode); 1696 err: 1697 return ERR_PTR(ret); 1698 } 1699 1700 static struct nfs4_state * 1701 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1702 { 1703 struct nfs4_state *ret; 1704 1705 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 1706 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 1707 else 1708 ret = _nfs4_opendata_to_nfs4_state(data); 1709 nfs4_sequence_free_slot(&data->o_res.seq_res); 1710 return ret; 1711 } 1712 1713 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) 1714 { 1715 struct nfs_inode *nfsi = NFS_I(state->inode); 1716 struct nfs_open_context *ctx; 1717 1718 spin_lock(&state->inode->i_lock); 1719 list_for_each_entry(ctx, &nfsi->open_files, list) { 1720 if (ctx->state != state) 1721 continue; 1722 get_nfs_open_context(ctx); 1723 spin_unlock(&state->inode->i_lock); 1724 return ctx; 1725 } 1726 spin_unlock(&state->inode->i_lock); 1727 return ERR_PTR(-ENOENT); 1728 } 1729 1730 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 1731 struct nfs4_state *state, enum open_claim_type4 claim) 1732 { 1733 struct nfs4_opendata *opendata; 1734 1735 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 1736 NULL, NULL, claim, GFP_NOFS); 1737 if (opendata == NULL) 1738 return ERR_PTR(-ENOMEM); 1739 opendata->state = state; 1740 atomic_inc(&state->count); 1741 return opendata; 1742 } 1743 1744 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 1745 fmode_t fmode) 1746 { 1747 struct nfs4_state *newstate; 1748 int ret; 1749 1750 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 1751 return 0; 1752 opendata->o_arg.open_flags = 0; 1753 opendata->o_arg.fmode = fmode; 1754 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 1755 NFS_SB(opendata->dentry->d_sb), 1756 fmode, 0); 1757 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 1758 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 1759 nfs4_init_opendata_res(opendata); 1760 ret = _nfs4_recover_proc_open(opendata); 1761 if (ret != 0) 1762 return ret; 1763 newstate = nfs4_opendata_to_nfs4_state(opendata); 1764 if (IS_ERR(newstate)) 1765 return PTR_ERR(newstate); 1766 if (newstate != opendata->state) 1767 ret = -ESTALE; 1768 nfs4_close_state(newstate, fmode); 1769 return ret; 1770 } 1771 1772 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 1773 { 1774 int ret; 1775 1776 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */ 1777 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1778 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1779 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1780 /* memory barrier prior to reading state->n_* */ 1781 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1782 clear_bit(NFS_OPEN_STATE, &state->flags); 1783 smp_rmb(); 1784 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 1785 if (ret != 0) 1786 return ret; 1787 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 1788 if (ret != 0) 1789 return ret; 1790 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 1791 if (ret != 0) 1792 return ret; 1793 /* 1794 * We may have performed cached opens for all three recoveries. 1795 * Check if we need to update the current stateid. 1796 */ 1797 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 1798 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 1799 write_seqlock(&state->seqlock); 1800 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1801 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1802 write_sequnlock(&state->seqlock); 1803 } 1804 return 0; 1805 } 1806 1807 /* 1808 * OPEN_RECLAIM: 1809 * reclaim state on the server after a reboot. 1810 */ 1811 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 1812 { 1813 struct nfs_delegation *delegation; 1814 struct nfs4_opendata *opendata; 1815 fmode_t delegation_type = 0; 1816 int status; 1817 1818 opendata = nfs4_open_recoverdata_alloc(ctx, state, 1819 NFS4_OPEN_CLAIM_PREVIOUS); 1820 if (IS_ERR(opendata)) 1821 return PTR_ERR(opendata); 1822 rcu_read_lock(); 1823 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1824 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 1825 delegation_type = delegation->type; 1826 rcu_read_unlock(); 1827 opendata->o_arg.u.delegation_type = delegation_type; 1828 status = nfs4_open_recover(opendata, state); 1829 nfs4_opendata_put(opendata); 1830 return status; 1831 } 1832 1833 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 1834 { 1835 struct nfs_server *server = NFS_SERVER(state->inode); 1836 struct nfs4_exception exception = { }; 1837 int err; 1838 do { 1839 err = _nfs4_do_open_reclaim(ctx, state); 1840 trace_nfs4_open_reclaim(ctx, 0, err); 1841 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 1842 continue; 1843 if (err != -NFS4ERR_DELAY) 1844 break; 1845 nfs4_handle_exception(server, err, &exception); 1846 } while (exception.retry); 1847 return err; 1848 } 1849 1850 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 1851 { 1852 struct nfs_open_context *ctx; 1853 int ret; 1854 1855 ctx = nfs4_state_find_open_context(state); 1856 if (IS_ERR(ctx)) 1857 return -EAGAIN; 1858 ret = nfs4_do_open_reclaim(ctx, state); 1859 put_nfs_open_context(ctx); 1860 return ret; 1861 } 1862 1863 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err) 1864 { 1865 switch (err) { 1866 default: 1867 printk(KERN_ERR "NFS: %s: unhandled error " 1868 "%d.\n", __func__, err); 1869 case 0: 1870 case -ENOENT: 1871 case -EAGAIN: 1872 case -ESTALE: 1873 break; 1874 case -NFS4ERR_BADSESSION: 1875 case -NFS4ERR_BADSLOT: 1876 case -NFS4ERR_BAD_HIGH_SLOT: 1877 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 1878 case -NFS4ERR_DEADSESSION: 1879 set_bit(NFS_DELEGATED_STATE, &state->flags); 1880 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); 1881 return -EAGAIN; 1882 case -NFS4ERR_STALE_CLIENTID: 1883 case -NFS4ERR_STALE_STATEID: 1884 set_bit(NFS_DELEGATED_STATE, &state->flags); 1885 /* Don't recall a delegation if it was lost */ 1886 nfs4_schedule_lease_recovery(server->nfs_client); 1887 return -EAGAIN; 1888 case -NFS4ERR_MOVED: 1889 nfs4_schedule_migration_recovery(server); 1890 return -EAGAIN; 1891 case -NFS4ERR_LEASE_MOVED: 1892 nfs4_schedule_lease_moved_recovery(server->nfs_client); 1893 return -EAGAIN; 1894 case -NFS4ERR_DELEG_REVOKED: 1895 case -NFS4ERR_ADMIN_REVOKED: 1896 case -NFS4ERR_EXPIRED: 1897 case -NFS4ERR_BAD_STATEID: 1898 case -NFS4ERR_OPENMODE: 1899 nfs_inode_find_state_and_recover(state->inode, 1900 stateid); 1901 nfs4_schedule_stateid_recovery(server, state); 1902 return -EAGAIN; 1903 case -NFS4ERR_DELAY: 1904 case -NFS4ERR_GRACE: 1905 set_bit(NFS_DELEGATED_STATE, &state->flags); 1906 ssleep(1); 1907 return -EAGAIN; 1908 case -ENOMEM: 1909 case -NFS4ERR_DENIED: 1910 /* kill_proc(fl->fl_pid, SIGLOST, 1); */ 1911 return 0; 1912 } 1913 return err; 1914 } 1915 1916 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 1917 struct nfs4_state *state, const nfs4_stateid *stateid, 1918 fmode_t type) 1919 { 1920 struct nfs_server *server = NFS_SERVER(state->inode); 1921 struct nfs4_opendata *opendata; 1922 int err = 0; 1923 1924 opendata = nfs4_open_recoverdata_alloc(ctx, state, 1925 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 1926 if (IS_ERR(opendata)) 1927 return PTR_ERR(opendata); 1928 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 1929 write_seqlock(&state->seqlock); 1930 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1931 write_sequnlock(&state->seqlock); 1932 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1933 switch (type & (FMODE_READ|FMODE_WRITE)) { 1934 case FMODE_READ|FMODE_WRITE: 1935 case FMODE_WRITE: 1936 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 1937 if (err) 1938 break; 1939 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 1940 if (err) 1941 break; 1942 case FMODE_READ: 1943 err = nfs4_open_recover_helper(opendata, FMODE_READ); 1944 } 1945 nfs4_opendata_put(opendata); 1946 return nfs4_handle_delegation_recall_error(server, state, stateid, err); 1947 } 1948 1949 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 1950 { 1951 struct nfs4_opendata *data = calldata; 1952 1953 nfs4_setup_sequence(data->o_arg.server->nfs_client, 1954 &data->c_arg.seq_args, &data->c_res.seq_res, task); 1955 } 1956 1957 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 1958 { 1959 struct nfs4_opendata *data = calldata; 1960 1961 nfs40_sequence_done(task, &data->c_res.seq_res); 1962 1963 data->rpc_status = task->tk_status; 1964 if (data->rpc_status == 0) { 1965 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 1966 nfs_confirm_seqid(&data->owner->so_seqid, 0); 1967 renew_lease(data->o_res.server, data->timestamp); 1968 data->rpc_done = true; 1969 } 1970 } 1971 1972 static void nfs4_open_confirm_release(void *calldata) 1973 { 1974 struct nfs4_opendata *data = calldata; 1975 struct nfs4_state *state = NULL; 1976 1977 /* If this request hasn't been cancelled, do nothing */ 1978 if (!data->cancelled) 1979 goto out_free; 1980 /* In case of error, no cleanup! */ 1981 if (!data->rpc_done) 1982 goto out_free; 1983 state = nfs4_opendata_to_nfs4_state(data); 1984 if (!IS_ERR(state)) 1985 nfs4_close_state(state, data->o_arg.fmode); 1986 out_free: 1987 nfs4_opendata_put(data); 1988 } 1989 1990 static const struct rpc_call_ops nfs4_open_confirm_ops = { 1991 .rpc_call_prepare = nfs4_open_confirm_prepare, 1992 .rpc_call_done = nfs4_open_confirm_done, 1993 .rpc_release = nfs4_open_confirm_release, 1994 }; 1995 1996 /* 1997 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 1998 */ 1999 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2000 { 2001 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2002 struct rpc_task *task; 2003 struct rpc_message msg = { 2004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2005 .rpc_argp = &data->c_arg, 2006 .rpc_resp = &data->c_res, 2007 .rpc_cred = data->owner->so_cred, 2008 }; 2009 struct rpc_task_setup task_setup_data = { 2010 .rpc_client = server->client, 2011 .rpc_message = &msg, 2012 .callback_ops = &nfs4_open_confirm_ops, 2013 .callback_data = data, 2014 .workqueue = nfsiod_workqueue, 2015 .flags = RPC_TASK_ASYNC, 2016 }; 2017 int status; 2018 2019 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1); 2020 kref_get(&data->kref); 2021 data->rpc_done = false; 2022 data->rpc_status = 0; 2023 data->timestamp = jiffies; 2024 if (data->is_recover) 2025 nfs4_set_sequence_privileged(&data->c_arg.seq_args); 2026 task = rpc_run_task(&task_setup_data); 2027 if (IS_ERR(task)) 2028 return PTR_ERR(task); 2029 status = rpc_wait_for_completion_task(task); 2030 if (status != 0) { 2031 data->cancelled = true; 2032 smp_wmb(); 2033 } else 2034 status = data->rpc_status; 2035 rpc_put_task(task); 2036 return status; 2037 } 2038 2039 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2040 { 2041 struct nfs4_opendata *data = calldata; 2042 struct nfs4_state_owner *sp = data->owner; 2043 struct nfs_client *clp = sp->so_server->nfs_client; 2044 enum open_claim_type4 claim = data->o_arg.claim; 2045 2046 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2047 goto out_wait; 2048 /* 2049 * Check if we still need to send an OPEN call, or if we can use 2050 * a delegation instead. 2051 */ 2052 if (data->state != NULL) { 2053 struct nfs_delegation *delegation; 2054 2055 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) 2056 goto out_no_action; 2057 rcu_read_lock(); 2058 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); 2059 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2060 goto unlock_no_action; 2061 rcu_read_unlock(); 2062 } 2063 /* Update client id. */ 2064 data->o_arg.clientid = clp->cl_clientid; 2065 switch (claim) { 2066 default: 2067 break; 2068 case NFS4_OPEN_CLAIM_PREVIOUS: 2069 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2070 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2071 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2072 case NFS4_OPEN_CLAIM_FH: 2073 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2074 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); 2075 } 2076 data->timestamp = jiffies; 2077 if (nfs4_setup_sequence(data->o_arg.server->nfs_client, 2078 &data->o_arg.seq_args, 2079 &data->o_res.seq_res, 2080 task) != 0) 2081 nfs_release_seqid(data->o_arg.seqid); 2082 2083 /* Set the create mode (note dependency on the session type) */ 2084 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2085 if (data->o_arg.open_flags & O_EXCL) { 2086 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2087 if (nfs4_has_persistent_session(clp)) 2088 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2089 else if (clp->cl_mvops->minor_version > 0) 2090 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2091 } 2092 return; 2093 unlock_no_action: 2094 trace_nfs4_cached_open(data->state); 2095 rcu_read_unlock(); 2096 out_no_action: 2097 task->tk_action = NULL; 2098 out_wait: 2099 nfs4_sequence_done(task, &data->o_res.seq_res); 2100 } 2101 2102 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2103 { 2104 struct nfs4_opendata *data = calldata; 2105 2106 data->rpc_status = task->tk_status; 2107 2108 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2109 return; 2110 2111 if (task->tk_status == 0) { 2112 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2113 switch (data->o_res.f_attr->mode & S_IFMT) { 2114 case S_IFREG: 2115 break; 2116 case S_IFLNK: 2117 data->rpc_status = -ELOOP; 2118 break; 2119 case S_IFDIR: 2120 data->rpc_status = -EISDIR; 2121 break; 2122 default: 2123 data->rpc_status = -ENOTDIR; 2124 } 2125 } 2126 renew_lease(data->o_res.server, data->timestamp); 2127 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2128 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2129 } 2130 data->rpc_done = true; 2131 } 2132 2133 static void nfs4_open_release(void *calldata) 2134 { 2135 struct nfs4_opendata *data = calldata; 2136 struct nfs4_state *state = NULL; 2137 2138 /* If this request hasn't been cancelled, do nothing */ 2139 if (!data->cancelled) 2140 goto out_free; 2141 /* In case of error, no cleanup! */ 2142 if (data->rpc_status != 0 || !data->rpc_done) 2143 goto out_free; 2144 /* In case we need an open_confirm, no cleanup! */ 2145 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2146 goto out_free; 2147 state = nfs4_opendata_to_nfs4_state(data); 2148 if (!IS_ERR(state)) 2149 nfs4_close_state(state, data->o_arg.fmode); 2150 out_free: 2151 nfs4_opendata_put(data); 2152 } 2153 2154 static const struct rpc_call_ops nfs4_open_ops = { 2155 .rpc_call_prepare = nfs4_open_prepare, 2156 .rpc_call_done = nfs4_open_done, 2157 .rpc_release = nfs4_open_release, 2158 }; 2159 2160 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) 2161 { 2162 struct inode *dir = d_inode(data->dir); 2163 struct nfs_server *server = NFS_SERVER(dir); 2164 struct nfs_openargs *o_arg = &data->o_arg; 2165 struct nfs_openres *o_res = &data->o_res; 2166 struct rpc_task *task; 2167 struct rpc_message msg = { 2168 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2169 .rpc_argp = o_arg, 2170 .rpc_resp = o_res, 2171 .rpc_cred = data->owner->so_cred, 2172 }; 2173 struct rpc_task_setup task_setup_data = { 2174 .rpc_client = server->client, 2175 .rpc_message = &msg, 2176 .callback_ops = &nfs4_open_ops, 2177 .callback_data = data, 2178 .workqueue = nfsiod_workqueue, 2179 .flags = RPC_TASK_ASYNC, 2180 }; 2181 int status; 2182 2183 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1); 2184 kref_get(&data->kref); 2185 data->rpc_done = false; 2186 data->rpc_status = 0; 2187 data->cancelled = false; 2188 data->is_recover = false; 2189 if (isrecover) { 2190 nfs4_set_sequence_privileged(&o_arg->seq_args); 2191 data->is_recover = true; 2192 } 2193 task = rpc_run_task(&task_setup_data); 2194 if (IS_ERR(task)) 2195 return PTR_ERR(task); 2196 status = rpc_wait_for_completion_task(task); 2197 if (status != 0) { 2198 data->cancelled = true; 2199 smp_wmb(); 2200 } else 2201 status = data->rpc_status; 2202 rpc_put_task(task); 2203 2204 return status; 2205 } 2206 2207 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2208 { 2209 struct inode *dir = d_inode(data->dir); 2210 struct nfs_openres *o_res = &data->o_res; 2211 int status; 2212 2213 status = nfs4_run_open_task(data, 1); 2214 if (status != 0 || !data->rpc_done) 2215 return status; 2216 2217 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2218 2219 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) 2220 status = _nfs4_proc_open_confirm(data); 2221 2222 return status; 2223 } 2224 2225 /* 2226 * Additional permission checks in order to distinguish between an 2227 * open for read, and an open for execute. This works around the 2228 * fact that NFSv4 OPEN treats read and execute permissions as being 2229 * the same. 2230 * Note that in the non-execute case, we want to turn off permission 2231 * checking if we just created a new file (POSIX open() semantics). 2232 */ 2233 static int nfs4_opendata_access(struct rpc_cred *cred, 2234 struct nfs4_opendata *opendata, 2235 struct nfs4_state *state, fmode_t fmode, 2236 int openflags) 2237 { 2238 struct nfs_access_entry cache; 2239 u32 mask, flags; 2240 2241 /* access call failed or for some reason the server doesn't 2242 * support any access modes -- defer access call until later */ 2243 if (opendata->o_res.access_supported == 0) 2244 return 0; 2245 2246 mask = 0; 2247 /* 2248 * Use openflags to check for exec, because fmode won't 2249 * always have FMODE_EXEC set when file open for exec. 2250 */ 2251 if (openflags & __FMODE_EXEC) { 2252 /* ONLY check for exec rights */ 2253 if (S_ISDIR(state->inode->i_mode)) 2254 mask = NFS4_ACCESS_LOOKUP; 2255 else 2256 mask = NFS4_ACCESS_EXECUTE; 2257 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2258 mask = NFS4_ACCESS_READ; 2259 2260 cache.cred = cred; 2261 cache.jiffies = jiffies; 2262 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2263 nfs_access_add_cache(state->inode, &cache); 2264 2265 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP; 2266 if ((mask & ~cache.mask & flags) == 0) 2267 return 0; 2268 2269 return -EACCES; 2270 } 2271 2272 /* 2273 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2274 */ 2275 static int _nfs4_proc_open(struct nfs4_opendata *data) 2276 { 2277 struct inode *dir = d_inode(data->dir); 2278 struct nfs_server *server = NFS_SERVER(dir); 2279 struct nfs_openargs *o_arg = &data->o_arg; 2280 struct nfs_openres *o_res = &data->o_res; 2281 int status; 2282 2283 status = nfs4_run_open_task(data, 0); 2284 if (!data->rpc_done) 2285 return status; 2286 if (status != 0) { 2287 if (status == -NFS4ERR_BADNAME && 2288 !(o_arg->open_flags & O_CREAT)) 2289 return -ENOENT; 2290 return status; 2291 } 2292 2293 nfs_fattr_map_and_free_names(server, &data->f_attr); 2294 2295 if (o_arg->open_flags & O_CREAT) { 2296 if (o_arg->open_flags & O_EXCL) 2297 data->file_created = true; 2298 else if (o_res->cinfo.before != o_res->cinfo.after) 2299 data->file_created = true; 2300 if (data->file_created || dir->i_version != o_res->cinfo.after) 2301 update_changeattr(dir, &o_res->cinfo, 2302 o_res->f_attr->time_start); 2303 } 2304 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2305 server->caps &= ~NFS_CAP_POSIX_LOCK; 2306 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2307 status = _nfs4_proc_open_confirm(data); 2308 if (status != 0) 2309 return status; 2310 } 2311 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) { 2312 nfs4_sequence_free_slot(&o_res->seq_res); 2313 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label); 2314 } 2315 return 0; 2316 } 2317 2318 /* 2319 * OPEN_EXPIRED: 2320 * reclaim state on the server after a network partition. 2321 * Assumes caller holds the appropriate lock 2322 */ 2323 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2324 { 2325 struct nfs4_opendata *opendata; 2326 int ret; 2327 2328 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2329 NFS4_OPEN_CLAIM_FH); 2330 if (IS_ERR(opendata)) 2331 return PTR_ERR(opendata); 2332 ret = nfs4_open_recover(opendata, state); 2333 if (ret == -ESTALE) 2334 d_drop(ctx->dentry); 2335 nfs4_opendata_put(opendata); 2336 return ret; 2337 } 2338 2339 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2340 { 2341 struct nfs_server *server = NFS_SERVER(state->inode); 2342 struct nfs4_exception exception = { }; 2343 int err; 2344 2345 do { 2346 err = _nfs4_open_expired(ctx, state); 2347 trace_nfs4_open_expired(ctx, 0, err); 2348 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2349 continue; 2350 switch (err) { 2351 default: 2352 goto out; 2353 case -NFS4ERR_GRACE: 2354 case -NFS4ERR_DELAY: 2355 nfs4_handle_exception(server, err, &exception); 2356 err = 0; 2357 } 2358 } while (exception.retry); 2359 out: 2360 return err; 2361 } 2362 2363 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2364 { 2365 struct nfs_open_context *ctx; 2366 int ret; 2367 2368 ctx = nfs4_state_find_open_context(state); 2369 if (IS_ERR(ctx)) 2370 return -EAGAIN; 2371 ret = nfs4_do_open_expired(ctx, state); 2372 put_nfs_open_context(ctx); 2373 return ret; 2374 } 2375 2376 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2377 const nfs4_stateid *stateid) 2378 { 2379 nfs_remove_bad_delegation(state->inode, stateid); 2380 write_seqlock(&state->seqlock); 2381 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2382 write_sequnlock(&state->seqlock); 2383 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2384 } 2385 2386 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2387 { 2388 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2389 nfs_finish_clear_delegation_stateid(state, NULL); 2390 } 2391 2392 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2393 { 2394 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2395 nfs40_clear_delegation_stateid(state); 2396 return nfs4_open_expired(sp, state); 2397 } 2398 2399 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2400 nfs4_stateid *stateid, 2401 struct rpc_cred *cred) 2402 { 2403 return -NFS4ERR_BAD_STATEID; 2404 } 2405 2406 #if defined(CONFIG_NFS_V4_1) 2407 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2408 nfs4_stateid *stateid, 2409 struct rpc_cred *cred) 2410 { 2411 int status; 2412 2413 switch (stateid->type) { 2414 default: 2415 break; 2416 case NFS4_INVALID_STATEID_TYPE: 2417 case NFS4_SPECIAL_STATEID_TYPE: 2418 return -NFS4ERR_BAD_STATEID; 2419 case NFS4_REVOKED_STATEID_TYPE: 2420 goto out_free; 2421 } 2422 2423 status = nfs41_test_stateid(server, stateid, cred); 2424 switch (status) { 2425 case -NFS4ERR_EXPIRED: 2426 case -NFS4ERR_ADMIN_REVOKED: 2427 case -NFS4ERR_DELEG_REVOKED: 2428 break; 2429 default: 2430 return status; 2431 } 2432 out_free: 2433 /* Ack the revoked state to the server */ 2434 nfs41_free_stateid(server, stateid, cred, true); 2435 return -NFS4ERR_EXPIRED; 2436 } 2437 2438 static void nfs41_check_delegation_stateid(struct nfs4_state *state) 2439 { 2440 struct nfs_server *server = NFS_SERVER(state->inode); 2441 nfs4_stateid stateid; 2442 struct nfs_delegation *delegation; 2443 struct rpc_cred *cred; 2444 int status; 2445 2446 /* Get the delegation credential for use by test/free_stateid */ 2447 rcu_read_lock(); 2448 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2449 if (delegation == NULL) { 2450 rcu_read_unlock(); 2451 return; 2452 } 2453 2454 nfs4_stateid_copy(&stateid, &delegation->stateid); 2455 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) || 2456 !test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, 2457 &delegation->flags)) { 2458 rcu_read_unlock(); 2459 nfs_finish_clear_delegation_stateid(state, &stateid); 2460 return; 2461 } 2462 2463 cred = get_rpccred(delegation->cred); 2464 rcu_read_unlock(); 2465 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2466 trace_nfs4_test_delegation_stateid(state, NULL, status); 2467 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2468 nfs_finish_clear_delegation_stateid(state, &stateid); 2469 2470 put_rpccred(cred); 2471 } 2472 2473 /** 2474 * nfs41_check_expired_locks - possibly free a lock stateid 2475 * 2476 * @state: NFSv4 state for an inode 2477 * 2478 * Returns NFS_OK if recovery for this stateid is now finished. 2479 * Otherwise a negative NFS4ERR value is returned. 2480 */ 2481 static int nfs41_check_expired_locks(struct nfs4_state *state) 2482 { 2483 int status, ret = NFS_OK; 2484 struct nfs4_lock_state *lsp, *prev = NULL; 2485 struct nfs_server *server = NFS_SERVER(state->inode); 2486 2487 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2488 goto out; 2489 2490 spin_lock(&state->state_lock); 2491 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2492 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2493 struct rpc_cred *cred = lsp->ls_state->owner->so_cred; 2494 2495 atomic_inc(&lsp->ls_count); 2496 spin_unlock(&state->state_lock); 2497 2498 nfs4_put_lock_state(prev); 2499 prev = lsp; 2500 2501 status = nfs41_test_and_free_expired_stateid(server, 2502 &lsp->ls_stateid, 2503 cred); 2504 trace_nfs4_test_lock_stateid(state, lsp, status); 2505 if (status == -NFS4ERR_EXPIRED || 2506 status == -NFS4ERR_BAD_STATEID) { 2507 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2508 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2509 if (!recover_lost_locks) 2510 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2511 } else if (status != NFS_OK) { 2512 ret = status; 2513 nfs4_put_lock_state(prev); 2514 goto out; 2515 } 2516 spin_lock(&state->state_lock); 2517 } 2518 } 2519 spin_unlock(&state->state_lock); 2520 nfs4_put_lock_state(prev); 2521 out: 2522 return ret; 2523 } 2524 2525 /** 2526 * nfs41_check_open_stateid - possibly free an open stateid 2527 * 2528 * @state: NFSv4 state for an inode 2529 * 2530 * Returns NFS_OK if recovery for this stateid is now finished. 2531 * Otherwise a negative NFS4ERR value is returned. 2532 */ 2533 static int nfs41_check_open_stateid(struct nfs4_state *state) 2534 { 2535 struct nfs_server *server = NFS_SERVER(state->inode); 2536 nfs4_stateid *stateid = &state->open_stateid; 2537 struct rpc_cred *cred = state->owner->so_cred; 2538 int status; 2539 2540 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) { 2541 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) { 2542 if (nfs4_have_delegation(state->inode, state->state)) 2543 return NFS_OK; 2544 return -NFS4ERR_OPENMODE; 2545 } 2546 return -NFS4ERR_BAD_STATEID; 2547 } 2548 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2549 trace_nfs4_test_open_stateid(state, NULL, status); 2550 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2551 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 2552 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 2553 clear_bit(NFS_O_RDWR_STATE, &state->flags); 2554 clear_bit(NFS_OPEN_STATE, &state->flags); 2555 stateid->type = NFS4_INVALID_STATEID_TYPE; 2556 } 2557 if (status != NFS_OK) 2558 return status; 2559 if (nfs_open_stateid_recover_openmode(state)) 2560 return -NFS4ERR_OPENMODE; 2561 return NFS_OK; 2562 } 2563 2564 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2565 { 2566 int status; 2567 2568 nfs41_check_delegation_stateid(state); 2569 status = nfs41_check_expired_locks(state); 2570 if (status != NFS_OK) 2571 return status; 2572 status = nfs41_check_open_stateid(state); 2573 if (status != NFS_OK) 2574 status = nfs4_open_expired(sp, state); 2575 return status; 2576 } 2577 #endif 2578 2579 /* 2580 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2581 * fields corresponding to attributes that were used to store the verifier. 2582 * Make sure we clobber those fields in the later setattr call 2583 */ 2584 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 2585 struct iattr *sattr, struct nfs4_label **label) 2586 { 2587 const u32 *attrset = opendata->o_res.attrset; 2588 2589 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) && 2590 !(sattr->ia_valid & ATTR_ATIME_SET)) 2591 sattr->ia_valid |= ATTR_ATIME; 2592 2593 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) && 2594 !(sattr->ia_valid & ATTR_MTIME_SET)) 2595 sattr->ia_valid |= ATTR_MTIME; 2596 2597 /* Except MODE, it seems harmless of setting twice. */ 2598 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE && 2599 (attrset[1] & FATTR4_WORD1_MODE || 2600 attrset[2] & FATTR4_WORD2_MODE_UMASK)) 2601 sattr->ia_valid &= ~ATTR_MODE; 2602 2603 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL) 2604 *label = NULL; 2605 } 2606 2607 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 2608 fmode_t fmode, 2609 int flags, 2610 struct nfs_open_context *ctx) 2611 { 2612 struct nfs4_state_owner *sp = opendata->owner; 2613 struct nfs_server *server = sp->so_server; 2614 struct dentry *dentry; 2615 struct nfs4_state *state; 2616 unsigned int seq; 2617 int ret; 2618 2619 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 2620 2621 ret = _nfs4_proc_open(opendata); 2622 if (ret != 0) 2623 goto out; 2624 2625 state = nfs4_opendata_to_nfs4_state(opendata); 2626 ret = PTR_ERR(state); 2627 if (IS_ERR(state)) 2628 goto out; 2629 ctx->state = state; 2630 if (server->caps & NFS_CAP_POSIX_LOCK) 2631 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 2632 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 2633 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 2634 2635 dentry = opendata->dentry; 2636 if (d_really_is_negative(dentry)) { 2637 struct dentry *alias; 2638 d_drop(dentry); 2639 alias = d_exact_alias(dentry, state->inode); 2640 if (!alias) 2641 alias = d_splice_alias(igrab(state->inode), dentry); 2642 /* d_splice_alias() can't fail here - it's a non-directory */ 2643 if (alias) { 2644 dput(ctx->dentry); 2645 ctx->dentry = dentry = alias; 2646 } 2647 nfs_set_verifier(dentry, 2648 nfs_save_change_attribute(d_inode(opendata->dir))); 2649 } 2650 2651 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags); 2652 if (ret != 0) 2653 goto out; 2654 2655 if (d_inode(dentry) == state->inode) { 2656 nfs_inode_attach_open_context(ctx); 2657 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 2658 nfs4_schedule_stateid_recovery(server, state); 2659 } 2660 out: 2661 return ret; 2662 } 2663 2664 /* 2665 * Returns a referenced nfs4_state 2666 */ 2667 static int _nfs4_do_open(struct inode *dir, 2668 struct nfs_open_context *ctx, 2669 int flags, 2670 struct iattr *sattr, 2671 struct nfs4_label *label, 2672 int *opened) 2673 { 2674 struct nfs4_state_owner *sp; 2675 struct nfs4_state *state = NULL; 2676 struct nfs_server *server = NFS_SERVER(dir); 2677 struct nfs4_opendata *opendata; 2678 struct dentry *dentry = ctx->dentry; 2679 struct rpc_cred *cred = ctx->cred; 2680 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 2681 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 2682 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 2683 struct nfs4_label *olabel = NULL; 2684 int status; 2685 2686 /* Protect against reboot recovery conflicts */ 2687 status = -ENOMEM; 2688 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 2689 if (sp == NULL) { 2690 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 2691 goto out_err; 2692 } 2693 status = nfs4_client_recover_expired_lease(server->nfs_client); 2694 if (status != 0) 2695 goto err_put_state_owner; 2696 if (d_really_is_positive(dentry)) 2697 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 2698 status = -ENOMEM; 2699 if (d_really_is_positive(dentry)) 2700 claim = NFS4_OPEN_CLAIM_FH; 2701 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, 2702 label, claim, GFP_KERNEL); 2703 if (opendata == NULL) 2704 goto err_put_state_owner; 2705 2706 if (label) { 2707 olabel = nfs4_label_alloc(server, GFP_KERNEL); 2708 if (IS_ERR(olabel)) { 2709 status = PTR_ERR(olabel); 2710 goto err_opendata_put; 2711 } 2712 } 2713 2714 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 2715 if (!opendata->f_attr.mdsthreshold) { 2716 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 2717 if (!opendata->f_attr.mdsthreshold) 2718 goto err_free_label; 2719 } 2720 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 2721 } 2722 if (d_really_is_positive(dentry)) 2723 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 2724 2725 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx); 2726 if (status != 0) 2727 goto err_free_label; 2728 state = ctx->state; 2729 2730 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 2731 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 2732 nfs4_exclusive_attrset(opendata, sattr, &label); 2733 /* 2734 * send create attributes which was not set by open 2735 * with an extra setattr. 2736 */ 2737 if (sattr->ia_valid & NFS4_VALID_ATTRS) { 2738 nfs_fattr_init(opendata->o_res.f_attr); 2739 status = nfs4_do_setattr(state->inode, cred, 2740 opendata->o_res.f_attr, sattr, 2741 ctx, label, olabel); 2742 if (status == 0) { 2743 nfs_setattr_update_inode(state->inode, sattr, 2744 opendata->o_res.f_attr); 2745 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); 2746 } 2747 } 2748 } 2749 if (opened && opendata->file_created) 2750 *opened |= FILE_CREATED; 2751 2752 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 2753 *ctx_th = opendata->f_attr.mdsthreshold; 2754 opendata->f_attr.mdsthreshold = NULL; 2755 } 2756 2757 nfs4_label_free(olabel); 2758 2759 nfs4_opendata_put(opendata); 2760 nfs4_put_state_owner(sp); 2761 return 0; 2762 err_free_label: 2763 nfs4_label_free(olabel); 2764 err_opendata_put: 2765 nfs4_opendata_put(opendata); 2766 err_put_state_owner: 2767 nfs4_put_state_owner(sp); 2768 out_err: 2769 return status; 2770 } 2771 2772 2773 static struct nfs4_state *nfs4_do_open(struct inode *dir, 2774 struct nfs_open_context *ctx, 2775 int flags, 2776 struct iattr *sattr, 2777 struct nfs4_label *label, 2778 int *opened) 2779 { 2780 struct nfs_server *server = NFS_SERVER(dir); 2781 struct nfs4_exception exception = { }; 2782 struct nfs4_state *res; 2783 int status; 2784 2785 do { 2786 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened); 2787 res = ctx->state; 2788 trace_nfs4_open_file(ctx, flags, status); 2789 if (status == 0) 2790 break; 2791 /* NOTE: BAD_SEQID means the server and client disagree about the 2792 * book-keeping w.r.t. state-changing operations 2793 * (OPEN/CLOSE/LOCK/LOCKU...) 2794 * It is actually a sign of a bug on the client or on the server. 2795 * 2796 * If we receive a BAD_SEQID error in the particular case of 2797 * doing an OPEN, we assume that nfs_increment_open_seqid() will 2798 * have unhashed the old state_owner for us, and that we can 2799 * therefore safely retry using a new one. We should still warn 2800 * the user though... 2801 */ 2802 if (status == -NFS4ERR_BAD_SEQID) { 2803 pr_warn_ratelimited("NFS: v4 server %s " 2804 " returned a bad sequence-id error!\n", 2805 NFS_SERVER(dir)->nfs_client->cl_hostname); 2806 exception.retry = 1; 2807 continue; 2808 } 2809 /* 2810 * BAD_STATEID on OPEN means that the server cancelled our 2811 * state before it received the OPEN_CONFIRM. 2812 * Recover by retrying the request as per the discussion 2813 * on Page 181 of RFC3530. 2814 */ 2815 if (status == -NFS4ERR_BAD_STATEID) { 2816 exception.retry = 1; 2817 continue; 2818 } 2819 if (status == -EAGAIN) { 2820 /* We must have found a delegation */ 2821 exception.retry = 1; 2822 continue; 2823 } 2824 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 2825 continue; 2826 res = ERR_PTR(nfs4_handle_exception(server, 2827 status, &exception)); 2828 } while (exception.retry); 2829 return res; 2830 } 2831 2832 static int _nfs4_do_setattr(struct inode *inode, 2833 struct nfs_setattrargs *arg, 2834 struct nfs_setattrres *res, 2835 struct rpc_cred *cred, 2836 struct nfs_open_context *ctx) 2837 { 2838 struct nfs_server *server = NFS_SERVER(inode); 2839 struct rpc_message msg = { 2840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 2841 .rpc_argp = arg, 2842 .rpc_resp = res, 2843 .rpc_cred = cred, 2844 }; 2845 struct rpc_cred *delegation_cred = NULL; 2846 unsigned long timestamp = jiffies; 2847 fmode_t fmode; 2848 bool truncate; 2849 int status; 2850 2851 nfs_fattr_init(res->fattr); 2852 2853 /* Servers should only apply open mode checks for file size changes */ 2854 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 2855 fmode = truncate ? FMODE_WRITE : FMODE_READ; 2856 2857 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) { 2858 /* Use that stateid */ 2859 } else if (truncate && ctx != NULL) { 2860 struct nfs_lock_context *l_ctx; 2861 if (!nfs4_valid_open_stateid(ctx->state)) 2862 return -EBADF; 2863 l_ctx = nfs_get_lock_context(ctx); 2864 if (IS_ERR(l_ctx)) 2865 return PTR_ERR(l_ctx); 2866 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx, 2867 &arg->stateid, &delegation_cred); 2868 nfs_put_lock_context(l_ctx); 2869 if (status == -EIO) 2870 return -EBADF; 2871 } else 2872 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 2873 if (delegation_cred) 2874 msg.rpc_cred = delegation_cred; 2875 2876 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 2877 2878 put_rpccred(delegation_cred); 2879 if (status == 0 && ctx != NULL) 2880 renew_lease(server, timestamp); 2881 trace_nfs4_setattr(inode, &arg->stateid, status); 2882 return status; 2883 } 2884 2885 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 2886 struct nfs_fattr *fattr, struct iattr *sattr, 2887 struct nfs_open_context *ctx, struct nfs4_label *ilabel, 2888 struct nfs4_label *olabel) 2889 { 2890 struct nfs_server *server = NFS_SERVER(inode); 2891 struct nfs4_state *state = ctx ? ctx->state : NULL; 2892 struct nfs_setattrargs arg = { 2893 .fh = NFS_FH(inode), 2894 .iap = sattr, 2895 .server = server, 2896 .bitmask = server->attr_bitmask, 2897 .label = ilabel, 2898 }; 2899 struct nfs_setattrres res = { 2900 .fattr = fattr, 2901 .label = olabel, 2902 .server = server, 2903 }; 2904 struct nfs4_exception exception = { 2905 .state = state, 2906 .inode = inode, 2907 .stateid = &arg.stateid, 2908 }; 2909 int err; 2910 2911 arg.bitmask = nfs4_bitmask(server, ilabel); 2912 if (ilabel) 2913 arg.bitmask = nfs4_bitmask(server, olabel); 2914 2915 do { 2916 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx); 2917 switch (err) { 2918 case -NFS4ERR_OPENMODE: 2919 if (!(sattr->ia_valid & ATTR_SIZE)) { 2920 pr_warn_once("NFSv4: server %s is incorrectly " 2921 "applying open mode checks to " 2922 "a SETATTR that is not " 2923 "changing file size.\n", 2924 server->nfs_client->cl_hostname); 2925 } 2926 if (state && !(state->state & FMODE_WRITE)) { 2927 err = -EBADF; 2928 if (sattr->ia_valid & ATTR_OPEN) 2929 err = -EACCES; 2930 goto out; 2931 } 2932 } 2933 err = nfs4_handle_exception(server, err, &exception); 2934 } while (exception.retry); 2935 out: 2936 return err; 2937 } 2938 2939 static bool 2940 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 2941 { 2942 if (inode == NULL || !nfs_have_layout(inode)) 2943 return false; 2944 2945 return pnfs_wait_on_layoutreturn(inode, task); 2946 } 2947 2948 struct nfs4_closedata { 2949 struct inode *inode; 2950 struct nfs4_state *state; 2951 struct nfs_closeargs arg; 2952 struct nfs_closeres res; 2953 struct { 2954 struct nfs4_layoutreturn_args arg; 2955 struct nfs4_layoutreturn_res res; 2956 struct nfs4_xdr_opaque_data ld_private; 2957 u32 roc_barrier; 2958 bool roc; 2959 } lr; 2960 struct nfs_fattr fattr; 2961 unsigned long timestamp; 2962 }; 2963 2964 static void nfs4_free_closedata(void *data) 2965 { 2966 struct nfs4_closedata *calldata = data; 2967 struct nfs4_state_owner *sp = calldata->state->owner; 2968 struct super_block *sb = calldata->state->inode->i_sb; 2969 2970 if (calldata->lr.roc) 2971 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res, 2972 calldata->res.lr_ret); 2973 nfs4_put_open_state(calldata->state); 2974 nfs_free_seqid(calldata->arg.seqid); 2975 nfs4_put_state_owner(sp); 2976 nfs_sb_deactive(sb); 2977 kfree(calldata); 2978 } 2979 2980 static void nfs4_close_done(struct rpc_task *task, void *data) 2981 { 2982 struct nfs4_closedata *calldata = data; 2983 struct nfs4_state *state = calldata->state; 2984 struct nfs_server *server = NFS_SERVER(calldata->inode); 2985 nfs4_stateid *res_stateid = NULL; 2986 2987 dprintk("%s: begin!\n", __func__); 2988 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 2989 return; 2990 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 2991 2992 /* Handle Layoutreturn errors */ 2993 if (calldata->arg.lr_args && task->tk_status != 0) { 2994 switch (calldata->res.lr_ret) { 2995 default: 2996 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 2997 break; 2998 case 0: 2999 calldata->arg.lr_args = NULL; 3000 calldata->res.lr_res = NULL; 3001 break; 3002 case -NFS4ERR_ADMIN_REVOKED: 3003 case -NFS4ERR_DELEG_REVOKED: 3004 case -NFS4ERR_EXPIRED: 3005 case -NFS4ERR_BAD_STATEID: 3006 case -NFS4ERR_OLD_STATEID: 3007 case -NFS4ERR_UNKNOWN_LAYOUTTYPE: 3008 case -NFS4ERR_WRONG_CRED: 3009 calldata->arg.lr_args = NULL; 3010 calldata->res.lr_res = NULL; 3011 calldata->res.lr_ret = 0; 3012 rpc_restart_call_prepare(task); 3013 return; 3014 } 3015 } 3016 3017 /* hmm. we are done with the inode, and in the process of freeing 3018 * the state_owner. we keep this around to process errors 3019 */ 3020 switch (task->tk_status) { 3021 case 0: 3022 res_stateid = &calldata->res.stateid; 3023 renew_lease(server, calldata->timestamp); 3024 break; 3025 case -NFS4ERR_ACCESS: 3026 if (calldata->arg.bitmask != NULL) { 3027 calldata->arg.bitmask = NULL; 3028 calldata->res.fattr = NULL; 3029 task->tk_status = 0; 3030 rpc_restart_call_prepare(task); 3031 goto out_release; 3032 3033 } 3034 break; 3035 case -NFS4ERR_ADMIN_REVOKED: 3036 case -NFS4ERR_STALE_STATEID: 3037 case -NFS4ERR_EXPIRED: 3038 nfs4_free_revoked_stateid(server, 3039 &calldata->arg.stateid, 3040 task->tk_msg.rpc_cred); 3041 case -NFS4ERR_OLD_STATEID: 3042 case -NFS4ERR_BAD_STATEID: 3043 if (!nfs4_stateid_match(&calldata->arg.stateid, 3044 &state->open_stateid)) { 3045 rpc_restart_call_prepare(task); 3046 goto out_release; 3047 } 3048 if (calldata->arg.fmode == 0) 3049 break; 3050 default: 3051 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) { 3052 rpc_restart_call_prepare(task); 3053 goto out_release; 3054 } 3055 } 3056 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3057 res_stateid, calldata->arg.fmode); 3058 out_release: 3059 nfs_release_seqid(calldata->arg.seqid); 3060 nfs_refresh_inode(calldata->inode, &calldata->fattr); 3061 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); 3062 } 3063 3064 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3065 { 3066 struct nfs4_closedata *calldata = data; 3067 struct nfs4_state *state = calldata->state; 3068 struct inode *inode = calldata->inode; 3069 bool is_rdonly, is_wronly, is_rdwr; 3070 int call_close = 0; 3071 3072 dprintk("%s: begin!\n", __func__); 3073 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3074 goto out_wait; 3075 3076 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3077 spin_lock(&state->owner->so_lock); 3078 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3079 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3080 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3081 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid); 3082 /* Calculate the change in open mode */ 3083 calldata->arg.fmode = 0; 3084 if (state->n_rdwr == 0) { 3085 if (state->n_rdonly == 0) 3086 call_close |= is_rdonly; 3087 else if (is_rdonly) 3088 calldata->arg.fmode |= FMODE_READ; 3089 if (state->n_wronly == 0) 3090 call_close |= is_wronly; 3091 else if (is_wronly) 3092 calldata->arg.fmode |= FMODE_WRITE; 3093 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3094 call_close |= is_rdwr; 3095 } else if (is_rdwr) 3096 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3097 3098 if (!nfs4_valid_open_stateid(state) || 3099 test_bit(NFS_OPEN_STATE, &state->flags) == 0) 3100 call_close = 0; 3101 spin_unlock(&state->owner->so_lock); 3102 3103 if (!call_close) { 3104 /* Note: exit _without_ calling nfs4_close_done */ 3105 goto out_no_action; 3106 } 3107 3108 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) { 3109 nfs_release_seqid(calldata->arg.seqid); 3110 goto out_wait; 3111 } 3112 3113 if (calldata->arg.fmode == 0) 3114 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3115 3116 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) { 3117 /* Close-to-open cache consistency revalidation */ 3118 if (!nfs4_have_delegation(inode, FMODE_READ)) 3119 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask; 3120 else 3121 calldata->arg.bitmask = NULL; 3122 } 3123 3124 calldata->arg.share_access = 3125 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3126 calldata->arg.fmode, 0); 3127 3128 if (calldata->res.fattr == NULL) 3129 calldata->arg.bitmask = NULL; 3130 else if (calldata->arg.bitmask == NULL) 3131 calldata->res.fattr = NULL; 3132 calldata->timestamp = jiffies; 3133 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client, 3134 &calldata->arg.seq_args, 3135 &calldata->res.seq_res, 3136 task) != 0) 3137 nfs_release_seqid(calldata->arg.seqid); 3138 dprintk("%s: done!\n", __func__); 3139 return; 3140 out_no_action: 3141 task->tk_action = NULL; 3142 out_wait: 3143 nfs4_sequence_done(task, &calldata->res.seq_res); 3144 } 3145 3146 static const struct rpc_call_ops nfs4_close_ops = { 3147 .rpc_call_prepare = nfs4_close_prepare, 3148 .rpc_call_done = nfs4_close_done, 3149 .rpc_release = nfs4_free_closedata, 3150 }; 3151 3152 /* 3153 * It is possible for data to be read/written from a mem-mapped file 3154 * after the sys_close call (which hits the vfs layer as a flush). 3155 * This means that we can't safely call nfsv4 close on a file until 3156 * the inode is cleared. This in turn means that we are not good 3157 * NFSv4 citizens - we do not indicate to the server to update the file's 3158 * share state even when we are done with one of the three share 3159 * stateid's in the inode. 3160 * 3161 * NOTE: Caller must be holding the sp->so_owner semaphore! 3162 */ 3163 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3164 { 3165 struct nfs_server *server = NFS_SERVER(state->inode); 3166 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3167 struct nfs4_closedata *calldata; 3168 struct nfs4_state_owner *sp = state->owner; 3169 struct rpc_task *task; 3170 struct rpc_message msg = { 3171 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3172 .rpc_cred = state->owner->so_cred, 3173 }; 3174 struct rpc_task_setup task_setup_data = { 3175 .rpc_client = server->client, 3176 .rpc_message = &msg, 3177 .callback_ops = &nfs4_close_ops, 3178 .workqueue = nfsiod_workqueue, 3179 .flags = RPC_TASK_ASYNC, 3180 }; 3181 int status = -ENOMEM; 3182 3183 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3184 &task_setup_data.rpc_client, &msg); 3185 3186 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3187 if (calldata == NULL) 3188 goto out; 3189 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1); 3190 calldata->inode = state->inode; 3191 calldata->state = state; 3192 calldata->arg.fh = NFS_FH(state->inode); 3193 /* Serialization for the sequence id */ 3194 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3195 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3196 if (IS_ERR(calldata->arg.seqid)) 3197 goto out_free_calldata; 3198 nfs_fattr_init(&calldata->fattr); 3199 calldata->arg.fmode = 0; 3200 calldata->lr.arg.ld_private = &calldata->lr.ld_private; 3201 calldata->res.fattr = &calldata->fattr; 3202 calldata->res.seqid = calldata->arg.seqid; 3203 calldata->res.server = server; 3204 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 3205 calldata->lr.roc = pnfs_roc(state->inode, 3206 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred); 3207 if (calldata->lr.roc) { 3208 calldata->arg.lr_args = &calldata->lr.arg; 3209 calldata->res.lr_res = &calldata->lr.res; 3210 } 3211 nfs_sb_active(calldata->inode->i_sb); 3212 3213 msg.rpc_argp = &calldata->arg; 3214 msg.rpc_resp = &calldata->res; 3215 task_setup_data.callback_data = calldata; 3216 task = rpc_run_task(&task_setup_data); 3217 if (IS_ERR(task)) 3218 return PTR_ERR(task); 3219 status = 0; 3220 if (wait) 3221 status = rpc_wait_for_completion_task(task); 3222 rpc_put_task(task); 3223 return status; 3224 out_free_calldata: 3225 kfree(calldata); 3226 out: 3227 nfs4_put_open_state(state); 3228 nfs4_put_state_owner(sp); 3229 return status; 3230 } 3231 3232 static struct inode * 3233 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3234 int open_flags, struct iattr *attr, int *opened) 3235 { 3236 struct nfs4_state *state; 3237 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 3238 3239 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3240 3241 /* Protect against concurrent sillydeletes */ 3242 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3243 3244 nfs4_label_release_security(label); 3245 3246 if (IS_ERR(state)) 3247 return ERR_CAST(state); 3248 return state->inode; 3249 } 3250 3251 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3252 { 3253 if (ctx->state == NULL) 3254 return; 3255 if (is_sync) 3256 nfs4_close_sync(ctx->state, ctx->mode); 3257 else 3258 nfs4_close_state(ctx->state, ctx->mode); 3259 } 3260 3261 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3262 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3263 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL) 3264 3265 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3266 { 3267 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3268 struct nfs4_server_caps_arg args = { 3269 .fhandle = fhandle, 3270 .bitmask = bitmask, 3271 }; 3272 struct nfs4_server_caps_res res = {}; 3273 struct rpc_message msg = { 3274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3275 .rpc_argp = &args, 3276 .rpc_resp = &res, 3277 }; 3278 int status; 3279 int i; 3280 3281 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3282 FATTR4_WORD0_FH_EXPIRE_TYPE | 3283 FATTR4_WORD0_LINK_SUPPORT | 3284 FATTR4_WORD0_SYMLINK_SUPPORT | 3285 FATTR4_WORD0_ACLSUPPORT; 3286 if (minorversion) 3287 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3288 3289 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3290 if (status == 0) { 3291 /* Sanity check the server answers */ 3292 switch (minorversion) { 3293 case 0: 3294 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3295 res.attr_bitmask[2] = 0; 3296 break; 3297 case 1: 3298 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3299 break; 3300 case 2: 3301 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3302 } 3303 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3304 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| 3305 NFS_CAP_SYMLINKS|NFS_CAP_FILEID| 3306 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| 3307 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| 3308 NFS_CAP_CTIME|NFS_CAP_MTIME| 3309 NFS_CAP_SECURITY_LABEL); 3310 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3311 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3312 server->caps |= NFS_CAP_ACLS; 3313 if (res.has_links != 0) 3314 server->caps |= NFS_CAP_HARDLINKS; 3315 if (res.has_symlinks != 0) 3316 server->caps |= NFS_CAP_SYMLINKS; 3317 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) 3318 server->caps |= NFS_CAP_FILEID; 3319 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) 3320 server->caps |= NFS_CAP_MODE; 3321 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) 3322 server->caps |= NFS_CAP_NLINK; 3323 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) 3324 server->caps |= NFS_CAP_OWNER; 3325 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) 3326 server->caps |= NFS_CAP_OWNER_GROUP; 3327 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) 3328 server->caps |= NFS_CAP_ATIME; 3329 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) 3330 server->caps |= NFS_CAP_CTIME; 3331 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) 3332 server->caps |= NFS_CAP_MTIME; 3333 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3334 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3335 server->caps |= NFS_CAP_SECURITY_LABEL; 3336 #endif 3337 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3338 sizeof(server->attr_bitmask)); 3339 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3340 3341 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3342 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3343 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3344 server->cache_consistency_bitmask[2] = 0; 3345 3346 /* Avoid a regression due to buggy server */ 3347 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++) 3348 res.exclcreat_bitmask[i] &= res.attr_bitmask[i]; 3349 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3350 sizeof(server->exclcreat_bitmask)); 3351 3352 server->acl_bitmask = res.acl_bitmask; 3353 server->fh_expire_type = res.fh_expire_type; 3354 } 3355 3356 return status; 3357 } 3358 3359 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3360 { 3361 struct nfs4_exception exception = { }; 3362 int err; 3363 do { 3364 err = nfs4_handle_exception(server, 3365 _nfs4_server_capabilities(server, fhandle), 3366 &exception); 3367 } while (exception.retry); 3368 return err; 3369 } 3370 3371 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3372 struct nfs_fsinfo *info) 3373 { 3374 u32 bitmask[3]; 3375 struct nfs4_lookup_root_arg args = { 3376 .bitmask = bitmask, 3377 }; 3378 struct nfs4_lookup_res res = { 3379 .server = server, 3380 .fattr = info->fattr, 3381 .fh = fhandle, 3382 }; 3383 struct rpc_message msg = { 3384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 3385 .rpc_argp = &args, 3386 .rpc_resp = &res, 3387 }; 3388 3389 bitmask[0] = nfs4_fattr_bitmap[0]; 3390 bitmask[1] = nfs4_fattr_bitmap[1]; 3391 /* 3392 * Process the label in the upcoming getfattr 3393 */ 3394 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 3395 3396 nfs_fattr_init(info->fattr); 3397 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3398 } 3399 3400 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3401 struct nfs_fsinfo *info) 3402 { 3403 struct nfs4_exception exception = { }; 3404 int err; 3405 do { 3406 err = _nfs4_lookup_root(server, fhandle, info); 3407 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 3408 switch (err) { 3409 case 0: 3410 case -NFS4ERR_WRONGSEC: 3411 goto out; 3412 default: 3413 err = nfs4_handle_exception(server, err, &exception); 3414 } 3415 } while (exception.retry); 3416 out: 3417 return err; 3418 } 3419 3420 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3421 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 3422 { 3423 struct rpc_auth_create_args auth_args = { 3424 .pseudoflavor = flavor, 3425 }; 3426 struct rpc_auth *auth; 3427 3428 auth = rpcauth_create(&auth_args, server->client); 3429 if (IS_ERR(auth)) 3430 return -EACCES; 3431 return nfs4_lookup_root(server, fhandle, info); 3432 } 3433 3434 /* 3435 * Retry pseudoroot lookup with various security flavors. We do this when: 3436 * 3437 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 3438 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 3439 * 3440 * Returns zero on success, or a negative NFS4ERR value, or a 3441 * negative errno value. 3442 */ 3443 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3444 struct nfs_fsinfo *info) 3445 { 3446 /* Per 3530bis 15.33.5 */ 3447 static const rpc_authflavor_t flav_array[] = { 3448 RPC_AUTH_GSS_KRB5P, 3449 RPC_AUTH_GSS_KRB5I, 3450 RPC_AUTH_GSS_KRB5, 3451 RPC_AUTH_UNIX, /* courtesy */ 3452 RPC_AUTH_NULL, 3453 }; 3454 int status = -EPERM; 3455 size_t i; 3456 3457 if (server->auth_info.flavor_len > 0) { 3458 /* try each flavor specified by user */ 3459 for (i = 0; i < server->auth_info.flavor_len; i++) { 3460 status = nfs4_lookup_root_sec(server, fhandle, info, 3461 server->auth_info.flavors[i]); 3462 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3463 continue; 3464 break; 3465 } 3466 } else { 3467 /* no flavors specified by user, try default list */ 3468 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 3469 status = nfs4_lookup_root_sec(server, fhandle, info, 3470 flav_array[i]); 3471 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3472 continue; 3473 break; 3474 } 3475 } 3476 3477 /* 3478 * -EACCESS could mean that the user doesn't have correct permissions 3479 * to access the mount. It could also mean that we tried to mount 3480 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 3481 * existing mount programs don't handle -EACCES very well so it should 3482 * be mapped to -EPERM instead. 3483 */ 3484 if (status == -EACCES) 3485 status = -EPERM; 3486 return status; 3487 } 3488 3489 /** 3490 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 3491 * @server: initialized nfs_server handle 3492 * @fhandle: we fill in the pseudo-fs root file handle 3493 * @info: we fill in an FSINFO struct 3494 * @auth_probe: probe the auth flavours 3495 * 3496 * Returns zero on success, or a negative errno. 3497 */ 3498 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 3499 struct nfs_fsinfo *info, 3500 bool auth_probe) 3501 { 3502 int status = 0; 3503 3504 if (!auth_probe) 3505 status = nfs4_lookup_root(server, fhandle, info); 3506 3507 if (auth_probe || status == NFS4ERR_WRONGSEC) 3508 status = server->nfs_client->cl_mvops->find_root_sec(server, 3509 fhandle, info); 3510 3511 if (status == 0) 3512 status = nfs4_server_capabilities(server, fhandle); 3513 if (status == 0) 3514 status = nfs4_do_fsinfo(server, fhandle, info); 3515 3516 return nfs4_map_errors(status); 3517 } 3518 3519 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 3520 struct nfs_fsinfo *info) 3521 { 3522 int error; 3523 struct nfs_fattr *fattr = info->fattr; 3524 struct nfs4_label *label = NULL; 3525 3526 error = nfs4_server_capabilities(server, mntfh); 3527 if (error < 0) { 3528 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 3529 return error; 3530 } 3531 3532 label = nfs4_label_alloc(server, GFP_KERNEL); 3533 if (IS_ERR(label)) 3534 return PTR_ERR(label); 3535 3536 error = nfs4_proc_getattr(server, mntfh, fattr, label); 3537 if (error < 0) { 3538 dprintk("nfs4_get_root: getattr error = %d\n", -error); 3539 goto err_free_label; 3540 } 3541 3542 if (fattr->valid & NFS_ATTR_FATTR_FSID && 3543 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 3544 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 3545 3546 err_free_label: 3547 nfs4_label_free(label); 3548 3549 return error; 3550 } 3551 3552 /* 3553 * Get locations and (maybe) other attributes of a referral. 3554 * Note that we'll actually follow the referral later when 3555 * we detect fsid mismatch in inode revalidation 3556 */ 3557 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 3558 const struct qstr *name, struct nfs_fattr *fattr, 3559 struct nfs_fh *fhandle) 3560 { 3561 int status = -ENOMEM; 3562 struct page *page = NULL; 3563 struct nfs4_fs_locations *locations = NULL; 3564 3565 page = alloc_page(GFP_KERNEL); 3566 if (page == NULL) 3567 goto out; 3568 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 3569 if (locations == NULL) 3570 goto out; 3571 3572 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 3573 if (status != 0) 3574 goto out; 3575 3576 /* 3577 * If the fsid didn't change, this is a migration event, not a 3578 * referral. Cause us to drop into the exception handler, which 3579 * will kick off migration recovery. 3580 */ 3581 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 3582 dprintk("%s: server did not return a different fsid for" 3583 " a referral at %s\n", __func__, name->name); 3584 status = -NFS4ERR_MOVED; 3585 goto out; 3586 } 3587 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 3588 nfs_fixup_referral_attributes(&locations->fattr); 3589 3590 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 3591 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 3592 memset(fhandle, 0, sizeof(struct nfs_fh)); 3593 out: 3594 if (page) 3595 __free_page(page); 3596 kfree(locations); 3597 return status; 3598 } 3599 3600 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3601 struct nfs_fattr *fattr, struct nfs4_label *label) 3602 { 3603 struct nfs4_getattr_arg args = { 3604 .fh = fhandle, 3605 .bitmask = server->attr_bitmask, 3606 }; 3607 struct nfs4_getattr_res res = { 3608 .fattr = fattr, 3609 .label = label, 3610 .server = server, 3611 }; 3612 struct rpc_message msg = { 3613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 3614 .rpc_argp = &args, 3615 .rpc_resp = &res, 3616 }; 3617 3618 args.bitmask = nfs4_bitmask(server, label); 3619 3620 nfs_fattr_init(fattr); 3621 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3622 } 3623 3624 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3625 struct nfs_fattr *fattr, struct nfs4_label *label) 3626 { 3627 struct nfs4_exception exception = { }; 3628 int err; 3629 do { 3630 err = _nfs4_proc_getattr(server, fhandle, fattr, label); 3631 trace_nfs4_getattr(server, fhandle, fattr, err); 3632 err = nfs4_handle_exception(server, err, 3633 &exception); 3634 } while (exception.retry); 3635 return err; 3636 } 3637 3638 /* 3639 * The file is not closed if it is opened due to the a request to change 3640 * the size of the file. The open call will not be needed once the 3641 * VFS layer lookup-intents are implemented. 3642 * 3643 * Close is called when the inode is destroyed. 3644 * If we haven't opened the file for O_WRONLY, we 3645 * need to in the size_change case to obtain a stateid. 3646 * 3647 * Got race? 3648 * Because OPEN is always done by name in nfsv4, it is 3649 * possible that we opened a different file by the same 3650 * name. We can recognize this race condition, but we 3651 * can't do anything about it besides returning an error. 3652 * 3653 * This will be fixed with VFS changes (lookup-intent). 3654 */ 3655 static int 3656 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 3657 struct iattr *sattr) 3658 { 3659 struct inode *inode = d_inode(dentry); 3660 struct rpc_cred *cred = NULL; 3661 struct nfs_open_context *ctx = NULL; 3662 struct nfs4_label *label = NULL; 3663 int status; 3664 3665 if (pnfs_ld_layoutret_on_setattr(inode) && 3666 sattr->ia_valid & ATTR_SIZE && 3667 sattr->ia_size < i_size_read(inode)) 3668 pnfs_commit_and_return_layout(inode); 3669 3670 nfs_fattr_init(fattr); 3671 3672 /* Deal with open(O_TRUNC) */ 3673 if (sattr->ia_valid & ATTR_OPEN) 3674 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 3675 3676 /* Optimization: if the end result is no change, don't RPC */ 3677 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 3678 return 0; 3679 3680 /* Search for an existing open(O_WRITE) file */ 3681 if (sattr->ia_valid & ATTR_FILE) { 3682 3683 ctx = nfs_file_open_context(sattr->ia_file); 3684 if (ctx) 3685 cred = ctx->cred; 3686 } 3687 3688 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 3689 if (IS_ERR(label)) 3690 return PTR_ERR(label); 3691 3692 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label); 3693 if (status == 0) { 3694 nfs_setattr_update_inode(inode, sattr, fattr); 3695 nfs_setsecurity(inode, fattr, label); 3696 } 3697 nfs4_label_free(label); 3698 return status; 3699 } 3700 3701 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 3702 const struct qstr *name, struct nfs_fh *fhandle, 3703 struct nfs_fattr *fattr, struct nfs4_label *label) 3704 { 3705 struct nfs_server *server = NFS_SERVER(dir); 3706 int status; 3707 struct nfs4_lookup_arg args = { 3708 .bitmask = server->attr_bitmask, 3709 .dir_fh = NFS_FH(dir), 3710 .name = name, 3711 }; 3712 struct nfs4_lookup_res res = { 3713 .server = server, 3714 .fattr = fattr, 3715 .label = label, 3716 .fh = fhandle, 3717 }; 3718 struct rpc_message msg = { 3719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 3720 .rpc_argp = &args, 3721 .rpc_resp = &res, 3722 }; 3723 3724 args.bitmask = nfs4_bitmask(server, label); 3725 3726 nfs_fattr_init(fattr); 3727 3728 dprintk("NFS call lookup %s\n", name->name); 3729 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); 3730 dprintk("NFS reply lookup: %d\n", status); 3731 return status; 3732 } 3733 3734 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 3735 { 3736 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 3737 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 3738 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 3739 fattr->nlink = 2; 3740 } 3741 3742 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 3743 const struct qstr *name, struct nfs_fh *fhandle, 3744 struct nfs_fattr *fattr, struct nfs4_label *label) 3745 { 3746 struct nfs4_exception exception = { }; 3747 struct rpc_clnt *client = *clnt; 3748 int err; 3749 do { 3750 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label); 3751 trace_nfs4_lookup(dir, name, err); 3752 switch (err) { 3753 case -NFS4ERR_BADNAME: 3754 err = -ENOENT; 3755 goto out; 3756 case -NFS4ERR_MOVED: 3757 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 3758 if (err == -NFS4ERR_MOVED) 3759 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 3760 goto out; 3761 case -NFS4ERR_WRONGSEC: 3762 err = -EPERM; 3763 if (client != *clnt) 3764 goto out; 3765 client = nfs4_negotiate_security(client, dir, name); 3766 if (IS_ERR(client)) 3767 return PTR_ERR(client); 3768 3769 exception.retry = 1; 3770 break; 3771 default: 3772 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 3773 } 3774 } while (exception.retry); 3775 3776 out: 3777 if (err == 0) 3778 *clnt = client; 3779 else if (client != *clnt) 3780 rpc_shutdown_client(client); 3781 3782 return err; 3783 } 3784 3785 static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name, 3786 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 3787 struct nfs4_label *label) 3788 { 3789 int status; 3790 struct rpc_clnt *client = NFS_CLIENT(dir); 3791 3792 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label); 3793 if (client != NFS_CLIENT(dir)) { 3794 rpc_shutdown_client(client); 3795 nfs_fixup_secinfo_attributes(fattr); 3796 } 3797 return status; 3798 } 3799 3800 struct rpc_clnt * 3801 nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name, 3802 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 3803 { 3804 struct rpc_clnt *client = NFS_CLIENT(dir); 3805 int status; 3806 3807 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL); 3808 if (status < 0) 3809 return ERR_PTR(status); 3810 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 3811 } 3812 3813 static int _nfs4_proc_lookupp(struct inode *inode, 3814 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 3815 struct nfs4_label *label) 3816 { 3817 struct rpc_clnt *clnt = NFS_CLIENT(inode); 3818 struct nfs_server *server = NFS_SERVER(inode); 3819 int status; 3820 struct nfs4_lookupp_arg args = { 3821 .bitmask = server->attr_bitmask, 3822 .fh = NFS_FH(inode), 3823 }; 3824 struct nfs4_lookupp_res res = { 3825 .server = server, 3826 .fattr = fattr, 3827 .label = label, 3828 .fh = fhandle, 3829 }; 3830 struct rpc_message msg = { 3831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP], 3832 .rpc_argp = &args, 3833 .rpc_resp = &res, 3834 }; 3835 3836 args.bitmask = nfs4_bitmask(server, label); 3837 3838 nfs_fattr_init(fattr); 3839 3840 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino); 3841 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 3842 &res.seq_res, 0); 3843 dprintk("NFS reply lookupp: %d\n", status); 3844 return status; 3845 } 3846 3847 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle, 3848 struct nfs_fattr *fattr, struct nfs4_label *label) 3849 { 3850 struct nfs4_exception exception = { }; 3851 int err; 3852 do { 3853 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label); 3854 trace_nfs4_lookupp(inode, err); 3855 err = nfs4_handle_exception(NFS_SERVER(inode), err, 3856 &exception); 3857 } while (exception.retry); 3858 return err; 3859 } 3860 3861 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 3862 { 3863 struct nfs_server *server = NFS_SERVER(inode); 3864 struct nfs4_accessargs args = { 3865 .fh = NFS_FH(inode), 3866 .bitmask = server->cache_consistency_bitmask, 3867 }; 3868 struct nfs4_accessres res = { 3869 .server = server, 3870 }; 3871 struct rpc_message msg = { 3872 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 3873 .rpc_argp = &args, 3874 .rpc_resp = &res, 3875 .rpc_cred = entry->cred, 3876 }; 3877 int mode = entry->mask; 3878 int status = 0; 3879 3880 /* 3881 * Determine which access bits we want to ask for... 3882 */ 3883 if (mode & MAY_READ) 3884 args.access |= NFS4_ACCESS_READ; 3885 if (S_ISDIR(inode->i_mode)) { 3886 if (mode & MAY_WRITE) 3887 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; 3888 if (mode & MAY_EXEC) 3889 args.access |= NFS4_ACCESS_LOOKUP; 3890 } else { 3891 if (mode & MAY_WRITE) 3892 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; 3893 if (mode & MAY_EXEC) 3894 args.access |= NFS4_ACCESS_EXECUTE; 3895 } 3896 3897 res.fattr = nfs_alloc_fattr(); 3898 if (res.fattr == NULL) 3899 return -ENOMEM; 3900 3901 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3902 if (!status) { 3903 nfs_access_set_mask(entry, res.access); 3904 nfs_refresh_inode(inode, res.fattr); 3905 } 3906 nfs_free_fattr(res.fattr); 3907 return status; 3908 } 3909 3910 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 3911 { 3912 struct nfs4_exception exception = { }; 3913 int err; 3914 do { 3915 err = _nfs4_proc_access(inode, entry); 3916 trace_nfs4_access(inode, err); 3917 err = nfs4_handle_exception(NFS_SERVER(inode), err, 3918 &exception); 3919 } while (exception.retry); 3920 return err; 3921 } 3922 3923 /* 3924 * TODO: For the time being, we don't try to get any attributes 3925 * along with any of the zero-copy operations READ, READDIR, 3926 * READLINK, WRITE. 3927 * 3928 * In the case of the first three, we want to put the GETATTR 3929 * after the read-type operation -- this is because it is hard 3930 * to predict the length of a GETATTR response in v4, and thus 3931 * align the READ data correctly. This means that the GETATTR 3932 * may end up partially falling into the page cache, and we should 3933 * shift it into the 'tail' of the xdr_buf before processing. 3934 * To do this efficiently, we need to know the total length 3935 * of data received, which doesn't seem to be available outside 3936 * of the RPC layer. 3937 * 3938 * In the case of WRITE, we also want to put the GETATTR after 3939 * the operation -- in this case because we want to make sure 3940 * we get the post-operation mtime and size. 3941 * 3942 * Both of these changes to the XDR layer would in fact be quite 3943 * minor, but I decided to leave them for a subsequent patch. 3944 */ 3945 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 3946 unsigned int pgbase, unsigned int pglen) 3947 { 3948 struct nfs4_readlink args = { 3949 .fh = NFS_FH(inode), 3950 .pgbase = pgbase, 3951 .pglen = pglen, 3952 .pages = &page, 3953 }; 3954 struct nfs4_readlink_res res; 3955 struct rpc_message msg = { 3956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 3957 .rpc_argp = &args, 3958 .rpc_resp = &res, 3959 }; 3960 3961 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 3962 } 3963 3964 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 3965 unsigned int pgbase, unsigned int pglen) 3966 { 3967 struct nfs4_exception exception = { }; 3968 int err; 3969 do { 3970 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 3971 trace_nfs4_readlink(inode, err); 3972 err = nfs4_handle_exception(NFS_SERVER(inode), err, 3973 &exception); 3974 } while (exception.retry); 3975 return err; 3976 } 3977 3978 /* 3979 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 3980 */ 3981 static int 3982 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 3983 int flags) 3984 { 3985 struct nfs_server *server = NFS_SERVER(dir); 3986 struct nfs4_label l, *ilabel = NULL; 3987 struct nfs_open_context *ctx; 3988 struct nfs4_state *state; 3989 int status = 0; 3990 3991 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL); 3992 if (IS_ERR(ctx)) 3993 return PTR_ERR(ctx); 3994 3995 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 3996 3997 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 3998 sattr->ia_mode &= ~current_umask(); 3999 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 4000 if (IS_ERR(state)) { 4001 status = PTR_ERR(state); 4002 goto out; 4003 } 4004 out: 4005 nfs4_label_release_security(ilabel); 4006 put_nfs_open_context(ctx); 4007 return status; 4008 } 4009 4010 static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name) 4011 { 4012 struct nfs_server *server = NFS_SERVER(dir); 4013 struct nfs_removeargs args = { 4014 .fh = NFS_FH(dir), 4015 .name = *name, 4016 }; 4017 struct nfs_removeres res = { 4018 .server = server, 4019 }; 4020 struct rpc_message msg = { 4021 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4022 .rpc_argp = &args, 4023 .rpc_resp = &res, 4024 }; 4025 unsigned long timestamp = jiffies; 4026 int status; 4027 4028 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4029 if (status == 0) 4030 update_changeattr(dir, &res.cinfo, timestamp); 4031 return status; 4032 } 4033 4034 static int nfs4_proc_remove(struct inode *dir, const struct qstr *name) 4035 { 4036 struct nfs4_exception exception = { }; 4037 int err; 4038 do { 4039 err = _nfs4_proc_remove(dir, name); 4040 trace_nfs4_remove(dir, name, err); 4041 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4042 &exception); 4043 } while (exception.retry); 4044 return err; 4045 } 4046 4047 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 4048 { 4049 struct nfs_server *server = NFS_SERVER(dir); 4050 struct nfs_removeargs *args = msg->rpc_argp; 4051 struct nfs_removeres *res = msg->rpc_resp; 4052 4053 res->server = server; 4054 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4055 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1); 4056 4057 nfs_fattr_init(res->dir_attr); 4058 } 4059 4060 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4061 { 4062 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client, 4063 &data->args.seq_args, 4064 &data->res.seq_res, 4065 task); 4066 } 4067 4068 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4069 { 4070 struct nfs_unlinkdata *data = task->tk_calldata; 4071 struct nfs_removeres *res = &data->res; 4072 4073 if (!nfs4_sequence_done(task, &res->seq_res)) 4074 return 0; 4075 if (nfs4_async_handle_error(task, res->server, NULL, 4076 &data->timeout) == -EAGAIN) 4077 return 0; 4078 if (task->tk_status == 0) 4079 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start); 4080 return 1; 4081 } 4082 4083 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir) 4084 { 4085 struct nfs_server *server = NFS_SERVER(dir); 4086 struct nfs_renameargs *arg = msg->rpc_argp; 4087 struct nfs_renameres *res = msg->rpc_resp; 4088 4089 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4090 res->server = server; 4091 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1); 4092 } 4093 4094 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4095 { 4096 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client, 4097 &data->args.seq_args, 4098 &data->res.seq_res, 4099 task); 4100 } 4101 4102 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4103 struct inode *new_dir) 4104 { 4105 struct nfs_renamedata *data = task->tk_calldata; 4106 struct nfs_renameres *res = &data->res; 4107 4108 if (!nfs4_sequence_done(task, &res->seq_res)) 4109 return 0; 4110 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4111 return 0; 4112 4113 if (task->tk_status == 0) { 4114 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start); 4115 if (new_dir != old_dir) 4116 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start); 4117 } 4118 return 1; 4119 } 4120 4121 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4122 { 4123 struct nfs_server *server = NFS_SERVER(inode); 4124 struct nfs4_link_arg arg = { 4125 .fh = NFS_FH(inode), 4126 .dir_fh = NFS_FH(dir), 4127 .name = name, 4128 .bitmask = server->attr_bitmask, 4129 }; 4130 struct nfs4_link_res res = { 4131 .server = server, 4132 .label = NULL, 4133 }; 4134 struct rpc_message msg = { 4135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4136 .rpc_argp = &arg, 4137 .rpc_resp = &res, 4138 }; 4139 int status = -ENOMEM; 4140 4141 res.fattr = nfs_alloc_fattr(); 4142 if (res.fattr == NULL) 4143 goto out; 4144 4145 res.label = nfs4_label_alloc(server, GFP_KERNEL); 4146 if (IS_ERR(res.label)) { 4147 status = PTR_ERR(res.label); 4148 goto out; 4149 } 4150 arg.bitmask = nfs4_bitmask(server, res.label); 4151 4152 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4153 if (!status) { 4154 update_changeattr(dir, &res.cinfo, res.fattr->time_start); 4155 status = nfs_post_op_update_inode(inode, res.fattr); 4156 if (!status) 4157 nfs_setsecurity(inode, res.fattr, res.label); 4158 } 4159 4160 4161 nfs4_label_free(res.label); 4162 4163 out: 4164 nfs_free_fattr(res.fattr); 4165 return status; 4166 } 4167 4168 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4169 { 4170 struct nfs4_exception exception = { }; 4171 int err; 4172 do { 4173 err = nfs4_handle_exception(NFS_SERVER(inode), 4174 _nfs4_proc_link(inode, dir, name), 4175 &exception); 4176 } while (exception.retry); 4177 return err; 4178 } 4179 4180 struct nfs4_createdata { 4181 struct rpc_message msg; 4182 struct nfs4_create_arg arg; 4183 struct nfs4_create_res res; 4184 struct nfs_fh fh; 4185 struct nfs_fattr fattr; 4186 struct nfs4_label *label; 4187 }; 4188 4189 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4190 const struct qstr *name, struct iattr *sattr, u32 ftype) 4191 { 4192 struct nfs4_createdata *data; 4193 4194 data = kzalloc(sizeof(*data), GFP_KERNEL); 4195 if (data != NULL) { 4196 struct nfs_server *server = NFS_SERVER(dir); 4197 4198 data->label = nfs4_label_alloc(server, GFP_KERNEL); 4199 if (IS_ERR(data->label)) 4200 goto out_free; 4201 4202 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4203 data->msg.rpc_argp = &data->arg; 4204 data->msg.rpc_resp = &data->res; 4205 data->arg.dir_fh = NFS_FH(dir); 4206 data->arg.server = server; 4207 data->arg.name = name; 4208 data->arg.attrs = sattr; 4209 data->arg.ftype = ftype; 4210 data->arg.bitmask = nfs4_bitmask(server, data->label); 4211 data->arg.umask = current_umask(); 4212 data->res.server = server; 4213 data->res.fh = &data->fh; 4214 data->res.fattr = &data->fattr; 4215 data->res.label = data->label; 4216 nfs_fattr_init(data->res.fattr); 4217 } 4218 return data; 4219 out_free: 4220 kfree(data); 4221 return NULL; 4222 } 4223 4224 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 4225 { 4226 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 4227 &data->arg.seq_args, &data->res.seq_res, 1); 4228 if (status == 0) { 4229 update_changeattr(dir, &data->res.dir_cinfo, 4230 data->res.fattr->time_start); 4231 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); 4232 } 4233 return status; 4234 } 4235 4236 static void nfs4_free_createdata(struct nfs4_createdata *data) 4237 { 4238 nfs4_label_free(data->label); 4239 kfree(data); 4240 } 4241 4242 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4243 struct page *page, unsigned int len, struct iattr *sattr, 4244 struct nfs4_label *label) 4245 { 4246 struct nfs4_createdata *data; 4247 int status = -ENAMETOOLONG; 4248 4249 if (len > NFS4_MAXPATHLEN) 4250 goto out; 4251 4252 status = -ENOMEM; 4253 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 4254 if (data == NULL) 4255 goto out; 4256 4257 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 4258 data->arg.u.symlink.pages = &page; 4259 data->arg.u.symlink.len = len; 4260 data->arg.label = label; 4261 4262 status = nfs4_do_create(dir, dentry, data); 4263 4264 nfs4_free_createdata(data); 4265 out: 4266 return status; 4267 } 4268 4269 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4270 struct page *page, unsigned int len, struct iattr *sattr) 4271 { 4272 struct nfs4_exception exception = { }; 4273 struct nfs4_label l, *label = NULL; 4274 int err; 4275 4276 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4277 4278 do { 4279 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 4280 trace_nfs4_symlink(dir, &dentry->d_name, err); 4281 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4282 &exception); 4283 } while (exception.retry); 4284 4285 nfs4_label_release_security(label); 4286 return err; 4287 } 4288 4289 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4290 struct iattr *sattr, struct nfs4_label *label) 4291 { 4292 struct nfs4_createdata *data; 4293 int status = -ENOMEM; 4294 4295 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 4296 if (data == NULL) 4297 goto out; 4298 4299 data->arg.label = label; 4300 status = nfs4_do_create(dir, dentry, data); 4301 4302 nfs4_free_createdata(data); 4303 out: 4304 return status; 4305 } 4306 4307 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4308 struct iattr *sattr) 4309 { 4310 struct nfs_server *server = NFS_SERVER(dir); 4311 struct nfs4_exception exception = { }; 4312 struct nfs4_label l, *label = NULL; 4313 int err; 4314 4315 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4316 4317 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4318 sattr->ia_mode &= ~current_umask(); 4319 do { 4320 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 4321 trace_nfs4_mkdir(dir, &dentry->d_name, err); 4322 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4323 &exception); 4324 } while (exception.retry); 4325 nfs4_label_release_security(label); 4326 4327 return err; 4328 } 4329 4330 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 4331 u64 cookie, struct page **pages, unsigned int count, bool plus) 4332 { 4333 struct inode *dir = d_inode(dentry); 4334 struct nfs4_readdir_arg args = { 4335 .fh = NFS_FH(dir), 4336 .pages = pages, 4337 .pgbase = 0, 4338 .count = count, 4339 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask, 4340 .plus = plus, 4341 }; 4342 struct nfs4_readdir_res res; 4343 struct rpc_message msg = { 4344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 4345 .rpc_argp = &args, 4346 .rpc_resp = &res, 4347 .rpc_cred = cred, 4348 }; 4349 int status; 4350 4351 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__, 4352 dentry, 4353 (unsigned long long)cookie); 4354 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); 4355 res.pgbase = args.pgbase; 4356 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); 4357 if (status >= 0) { 4358 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); 4359 status += args.pgbase; 4360 } 4361 4362 nfs_invalidate_atime(dir); 4363 4364 dprintk("%s: returns %d\n", __func__, status); 4365 return status; 4366 } 4367 4368 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 4369 u64 cookie, struct page **pages, unsigned int count, bool plus) 4370 { 4371 struct nfs4_exception exception = { }; 4372 int err; 4373 do { 4374 err = _nfs4_proc_readdir(dentry, cred, cookie, 4375 pages, count, plus); 4376 trace_nfs4_readdir(d_inode(dentry), err); 4377 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err, 4378 &exception); 4379 } while (exception.retry); 4380 return err; 4381 } 4382 4383 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 4384 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 4385 { 4386 struct nfs4_createdata *data; 4387 int mode = sattr->ia_mode; 4388 int status = -ENOMEM; 4389 4390 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 4391 if (data == NULL) 4392 goto out; 4393 4394 if (S_ISFIFO(mode)) 4395 data->arg.ftype = NF4FIFO; 4396 else if (S_ISBLK(mode)) { 4397 data->arg.ftype = NF4BLK; 4398 data->arg.u.device.specdata1 = MAJOR(rdev); 4399 data->arg.u.device.specdata2 = MINOR(rdev); 4400 } 4401 else if (S_ISCHR(mode)) { 4402 data->arg.ftype = NF4CHR; 4403 data->arg.u.device.specdata1 = MAJOR(rdev); 4404 data->arg.u.device.specdata2 = MINOR(rdev); 4405 } else if (!S_ISSOCK(mode)) { 4406 status = -EINVAL; 4407 goto out_free; 4408 } 4409 4410 data->arg.label = label; 4411 status = nfs4_do_create(dir, dentry, data); 4412 out_free: 4413 nfs4_free_createdata(data); 4414 out: 4415 return status; 4416 } 4417 4418 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 4419 struct iattr *sattr, dev_t rdev) 4420 { 4421 struct nfs_server *server = NFS_SERVER(dir); 4422 struct nfs4_exception exception = { }; 4423 struct nfs4_label l, *label = NULL; 4424 int err; 4425 4426 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4427 4428 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK)) 4429 sattr->ia_mode &= ~current_umask(); 4430 do { 4431 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 4432 trace_nfs4_mknod(dir, &dentry->d_name, err); 4433 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4434 &exception); 4435 } while (exception.retry); 4436 4437 nfs4_label_release_security(label); 4438 4439 return err; 4440 } 4441 4442 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 4443 struct nfs_fsstat *fsstat) 4444 { 4445 struct nfs4_statfs_arg args = { 4446 .fh = fhandle, 4447 .bitmask = server->attr_bitmask, 4448 }; 4449 struct nfs4_statfs_res res = { 4450 .fsstat = fsstat, 4451 }; 4452 struct rpc_message msg = { 4453 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 4454 .rpc_argp = &args, 4455 .rpc_resp = &res, 4456 }; 4457 4458 nfs_fattr_init(fsstat->fattr); 4459 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4460 } 4461 4462 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 4463 { 4464 struct nfs4_exception exception = { }; 4465 int err; 4466 do { 4467 err = nfs4_handle_exception(server, 4468 _nfs4_proc_statfs(server, fhandle, fsstat), 4469 &exception); 4470 } while (exception.retry); 4471 return err; 4472 } 4473 4474 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 4475 struct nfs_fsinfo *fsinfo) 4476 { 4477 struct nfs4_fsinfo_arg args = { 4478 .fh = fhandle, 4479 .bitmask = server->attr_bitmask, 4480 }; 4481 struct nfs4_fsinfo_res res = { 4482 .fsinfo = fsinfo, 4483 }; 4484 struct rpc_message msg = { 4485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 4486 .rpc_argp = &args, 4487 .rpc_resp = &res, 4488 }; 4489 4490 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4491 } 4492 4493 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 4494 { 4495 struct nfs4_exception exception = { }; 4496 unsigned long now = jiffies; 4497 int err; 4498 4499 do { 4500 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 4501 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 4502 if (err == 0) { 4503 nfs4_set_lease_period(server->nfs_client, 4504 fsinfo->lease_time * HZ, 4505 now); 4506 break; 4507 } 4508 err = nfs4_handle_exception(server, err, &exception); 4509 } while (exception.retry); 4510 return err; 4511 } 4512 4513 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 4514 { 4515 int error; 4516 4517 nfs_fattr_init(fsinfo->fattr); 4518 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 4519 if (error == 0) { 4520 /* block layout checks this! */ 4521 server->pnfs_blksize = fsinfo->blksize; 4522 set_pnfs_layoutdriver(server, fhandle, fsinfo); 4523 } 4524 4525 return error; 4526 } 4527 4528 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 4529 struct nfs_pathconf *pathconf) 4530 { 4531 struct nfs4_pathconf_arg args = { 4532 .fh = fhandle, 4533 .bitmask = server->attr_bitmask, 4534 }; 4535 struct nfs4_pathconf_res res = { 4536 .pathconf = pathconf, 4537 }; 4538 struct rpc_message msg = { 4539 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 4540 .rpc_argp = &args, 4541 .rpc_resp = &res, 4542 }; 4543 4544 /* None of the pathconf attributes are mandatory to implement */ 4545 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 4546 memset(pathconf, 0, sizeof(*pathconf)); 4547 return 0; 4548 } 4549 4550 nfs_fattr_init(pathconf->fattr); 4551 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4552 } 4553 4554 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 4555 struct nfs_pathconf *pathconf) 4556 { 4557 struct nfs4_exception exception = { }; 4558 int err; 4559 4560 do { 4561 err = nfs4_handle_exception(server, 4562 _nfs4_proc_pathconf(server, fhandle, pathconf), 4563 &exception); 4564 } while (exception.retry); 4565 return err; 4566 } 4567 4568 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 4569 const struct nfs_open_context *ctx, 4570 const struct nfs_lock_context *l_ctx, 4571 fmode_t fmode) 4572 { 4573 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL); 4574 } 4575 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 4576 4577 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 4578 const struct nfs_open_context *ctx, 4579 const struct nfs_lock_context *l_ctx, 4580 fmode_t fmode) 4581 { 4582 nfs4_stateid current_stateid; 4583 4584 /* If the current stateid represents a lost lock, then exit */ 4585 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO) 4586 return true; 4587 return nfs4_stateid_match(stateid, ¤t_stateid); 4588 } 4589 4590 static bool nfs4_error_stateid_expired(int err) 4591 { 4592 switch (err) { 4593 case -NFS4ERR_DELEG_REVOKED: 4594 case -NFS4ERR_ADMIN_REVOKED: 4595 case -NFS4ERR_BAD_STATEID: 4596 case -NFS4ERR_STALE_STATEID: 4597 case -NFS4ERR_OLD_STATEID: 4598 case -NFS4ERR_OPENMODE: 4599 case -NFS4ERR_EXPIRED: 4600 return true; 4601 } 4602 return false; 4603 } 4604 4605 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 4606 { 4607 struct nfs_server *server = NFS_SERVER(hdr->inode); 4608 4609 trace_nfs4_read(hdr, task->tk_status); 4610 if (task->tk_status < 0) { 4611 struct nfs4_exception exception = { 4612 .inode = hdr->inode, 4613 .state = hdr->args.context->state, 4614 .stateid = &hdr->args.stateid, 4615 }; 4616 task->tk_status = nfs4_async_handle_exception(task, 4617 server, task->tk_status, &exception); 4618 if (exception.retry) { 4619 rpc_restart_call_prepare(task); 4620 return -EAGAIN; 4621 } 4622 } 4623 4624 if (task->tk_status > 0) 4625 renew_lease(server, hdr->timestamp); 4626 return 0; 4627 } 4628 4629 static bool nfs4_read_stateid_changed(struct rpc_task *task, 4630 struct nfs_pgio_args *args) 4631 { 4632 4633 if (!nfs4_error_stateid_expired(task->tk_status) || 4634 nfs4_stateid_is_current(&args->stateid, 4635 args->context, 4636 args->lock_context, 4637 FMODE_READ)) 4638 return false; 4639 rpc_restart_call_prepare(task); 4640 return true; 4641 } 4642 4643 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 4644 { 4645 4646 dprintk("--> %s\n", __func__); 4647 4648 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 4649 return -EAGAIN; 4650 if (nfs4_read_stateid_changed(task, &hdr->args)) 4651 return -EAGAIN; 4652 if (task->tk_status > 0) 4653 nfs_invalidate_atime(hdr->inode); 4654 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 4655 nfs4_read_done_cb(task, hdr); 4656 } 4657 4658 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 4659 struct rpc_message *msg) 4660 { 4661 hdr->timestamp = jiffies; 4662 if (!hdr->pgio_done_cb) 4663 hdr->pgio_done_cb = nfs4_read_done_cb; 4664 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 4665 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0); 4666 } 4667 4668 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 4669 struct nfs_pgio_header *hdr) 4670 { 4671 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client, 4672 &hdr->args.seq_args, 4673 &hdr->res.seq_res, 4674 task)) 4675 return 0; 4676 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 4677 hdr->args.lock_context, 4678 hdr->rw_mode) == -EIO) 4679 return -EIO; 4680 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 4681 return -EIO; 4682 return 0; 4683 } 4684 4685 static int nfs4_write_done_cb(struct rpc_task *task, 4686 struct nfs_pgio_header *hdr) 4687 { 4688 struct inode *inode = hdr->inode; 4689 4690 trace_nfs4_write(hdr, task->tk_status); 4691 if (task->tk_status < 0) { 4692 struct nfs4_exception exception = { 4693 .inode = hdr->inode, 4694 .state = hdr->args.context->state, 4695 .stateid = &hdr->args.stateid, 4696 }; 4697 task->tk_status = nfs4_async_handle_exception(task, 4698 NFS_SERVER(inode), task->tk_status, 4699 &exception); 4700 if (exception.retry) { 4701 rpc_restart_call_prepare(task); 4702 return -EAGAIN; 4703 } 4704 } 4705 if (task->tk_status >= 0) { 4706 renew_lease(NFS_SERVER(inode), hdr->timestamp); 4707 nfs_writeback_update_inode(hdr); 4708 } 4709 return 0; 4710 } 4711 4712 static bool nfs4_write_stateid_changed(struct rpc_task *task, 4713 struct nfs_pgio_args *args) 4714 { 4715 4716 if (!nfs4_error_stateid_expired(task->tk_status) || 4717 nfs4_stateid_is_current(&args->stateid, 4718 args->context, 4719 args->lock_context, 4720 FMODE_WRITE)) 4721 return false; 4722 rpc_restart_call_prepare(task); 4723 return true; 4724 } 4725 4726 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 4727 { 4728 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 4729 return -EAGAIN; 4730 if (nfs4_write_stateid_changed(task, &hdr->args)) 4731 return -EAGAIN; 4732 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 4733 nfs4_write_done_cb(task, hdr); 4734 } 4735 4736 static 4737 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 4738 { 4739 /* Don't request attributes for pNFS or O_DIRECT writes */ 4740 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 4741 return false; 4742 /* Otherwise, request attributes if and only if we don't hold 4743 * a delegation 4744 */ 4745 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 4746 } 4747 4748 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 4749 struct rpc_message *msg) 4750 { 4751 struct nfs_server *server = NFS_SERVER(hdr->inode); 4752 4753 if (!nfs4_write_need_cache_consistency_data(hdr)) { 4754 hdr->args.bitmask = NULL; 4755 hdr->res.fattr = NULL; 4756 } else 4757 hdr->args.bitmask = server->cache_consistency_bitmask; 4758 4759 if (!hdr->pgio_done_cb) 4760 hdr->pgio_done_cb = nfs4_write_done_cb; 4761 hdr->res.server = server; 4762 hdr->timestamp = jiffies; 4763 4764 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 4765 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1); 4766 } 4767 4768 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 4769 { 4770 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client, 4771 &data->args.seq_args, 4772 &data->res.seq_res, 4773 task); 4774 } 4775 4776 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 4777 { 4778 struct inode *inode = data->inode; 4779 4780 trace_nfs4_commit(data, task->tk_status); 4781 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 4782 NULL, NULL) == -EAGAIN) { 4783 rpc_restart_call_prepare(task); 4784 return -EAGAIN; 4785 } 4786 return 0; 4787 } 4788 4789 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 4790 { 4791 if (!nfs4_sequence_done(task, &data->res.seq_res)) 4792 return -EAGAIN; 4793 return data->commit_done_cb(task, data); 4794 } 4795 4796 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) 4797 { 4798 struct nfs_server *server = NFS_SERVER(data->inode); 4799 4800 if (data->commit_done_cb == NULL) 4801 data->commit_done_cb = nfs4_commit_done_cb; 4802 data->res.server = server; 4803 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 4804 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 4805 } 4806 4807 struct nfs4_renewdata { 4808 struct nfs_client *client; 4809 unsigned long timestamp; 4810 }; 4811 4812 /* 4813 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 4814 * standalone procedure for queueing an asynchronous RENEW. 4815 */ 4816 static void nfs4_renew_release(void *calldata) 4817 { 4818 struct nfs4_renewdata *data = calldata; 4819 struct nfs_client *clp = data->client; 4820 4821 if (atomic_read(&clp->cl_count) > 1) 4822 nfs4_schedule_state_renewal(clp); 4823 nfs_put_client(clp); 4824 kfree(data); 4825 } 4826 4827 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 4828 { 4829 struct nfs4_renewdata *data = calldata; 4830 struct nfs_client *clp = data->client; 4831 unsigned long timestamp = data->timestamp; 4832 4833 trace_nfs4_renew_async(clp, task->tk_status); 4834 switch (task->tk_status) { 4835 case 0: 4836 break; 4837 case -NFS4ERR_LEASE_MOVED: 4838 nfs4_schedule_lease_moved_recovery(clp); 4839 break; 4840 default: 4841 /* Unless we're shutting down, schedule state recovery! */ 4842 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 4843 return; 4844 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 4845 nfs4_schedule_lease_recovery(clp); 4846 return; 4847 } 4848 nfs4_schedule_path_down_recovery(clp); 4849 } 4850 do_renew_lease(clp, timestamp); 4851 } 4852 4853 static const struct rpc_call_ops nfs4_renew_ops = { 4854 .rpc_call_done = nfs4_renew_done, 4855 .rpc_release = nfs4_renew_release, 4856 }; 4857 4858 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) 4859 { 4860 struct rpc_message msg = { 4861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 4862 .rpc_argp = clp, 4863 .rpc_cred = cred, 4864 }; 4865 struct nfs4_renewdata *data; 4866 4867 if (renew_flags == 0) 4868 return 0; 4869 if (!atomic_inc_not_zero(&clp->cl_count)) 4870 return -EIO; 4871 data = kmalloc(sizeof(*data), GFP_NOFS); 4872 if (data == NULL) { 4873 nfs_put_client(clp); 4874 return -ENOMEM; 4875 } 4876 data->client = clp; 4877 data->timestamp = jiffies; 4878 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 4879 &nfs4_renew_ops, data); 4880 } 4881 4882 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) 4883 { 4884 struct rpc_message msg = { 4885 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 4886 .rpc_argp = clp, 4887 .rpc_cred = cred, 4888 }; 4889 unsigned long now = jiffies; 4890 int status; 4891 4892 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 4893 if (status < 0) 4894 return status; 4895 do_renew_lease(clp, now); 4896 return 0; 4897 } 4898 4899 static inline int nfs4_server_supports_acls(struct nfs_server *server) 4900 { 4901 return server->caps & NFS_CAP_ACLS; 4902 } 4903 4904 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 4905 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 4906 * the stack. 4907 */ 4908 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 4909 4910 static int buf_to_pages_noslab(const void *buf, size_t buflen, 4911 struct page **pages) 4912 { 4913 struct page *newpage, **spages; 4914 int rc = 0; 4915 size_t len; 4916 spages = pages; 4917 4918 do { 4919 len = min_t(size_t, PAGE_SIZE, buflen); 4920 newpage = alloc_page(GFP_KERNEL); 4921 4922 if (newpage == NULL) 4923 goto unwind; 4924 memcpy(page_address(newpage), buf, len); 4925 buf += len; 4926 buflen -= len; 4927 *pages++ = newpage; 4928 rc++; 4929 } while (buflen != 0); 4930 4931 return rc; 4932 4933 unwind: 4934 for(; rc > 0; rc--) 4935 __free_page(spages[rc-1]); 4936 return -ENOMEM; 4937 } 4938 4939 struct nfs4_cached_acl { 4940 int cached; 4941 size_t len; 4942 char data[0]; 4943 }; 4944 4945 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 4946 { 4947 struct nfs_inode *nfsi = NFS_I(inode); 4948 4949 spin_lock(&inode->i_lock); 4950 kfree(nfsi->nfs4_acl); 4951 nfsi->nfs4_acl = acl; 4952 spin_unlock(&inode->i_lock); 4953 } 4954 4955 static void nfs4_zap_acl_attr(struct inode *inode) 4956 { 4957 nfs4_set_cached_acl(inode, NULL); 4958 } 4959 4960 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 4961 { 4962 struct nfs_inode *nfsi = NFS_I(inode); 4963 struct nfs4_cached_acl *acl; 4964 int ret = -ENOENT; 4965 4966 spin_lock(&inode->i_lock); 4967 acl = nfsi->nfs4_acl; 4968 if (acl == NULL) 4969 goto out; 4970 if (buf == NULL) /* user is just asking for length */ 4971 goto out_len; 4972 if (acl->cached == 0) 4973 goto out; 4974 ret = -ERANGE; /* see getxattr(2) man page */ 4975 if (acl->len > buflen) 4976 goto out; 4977 memcpy(buf, acl->data, acl->len); 4978 out_len: 4979 ret = acl->len; 4980 out: 4981 spin_unlock(&inode->i_lock); 4982 return ret; 4983 } 4984 4985 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 4986 { 4987 struct nfs4_cached_acl *acl; 4988 size_t buflen = sizeof(*acl) + acl_len; 4989 4990 if (buflen <= PAGE_SIZE) { 4991 acl = kmalloc(buflen, GFP_KERNEL); 4992 if (acl == NULL) 4993 goto out; 4994 acl->cached = 1; 4995 _copy_from_pages(acl->data, pages, pgbase, acl_len); 4996 } else { 4997 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 4998 if (acl == NULL) 4999 goto out; 5000 acl->cached = 0; 5001 } 5002 acl->len = acl_len; 5003 out: 5004 nfs4_set_cached_acl(inode, acl); 5005 } 5006 5007 /* 5008 * The getxattr API returns the required buffer length when called with a 5009 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 5010 * the required buf. On a NULL buf, we send a page of data to the server 5011 * guessing that the ACL request can be serviced by a page. If so, we cache 5012 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 5013 * the cache. If not so, we throw away the page, and cache the required 5014 * length. The next getxattr call will then produce another round trip to 5015 * the server, this time with the input buf of the required size. 5016 */ 5017 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5018 { 5019 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, }; 5020 struct nfs_getaclargs args = { 5021 .fh = NFS_FH(inode), 5022 .acl_pages = pages, 5023 .acl_len = buflen, 5024 }; 5025 struct nfs_getaclres res = { 5026 .acl_len = buflen, 5027 }; 5028 struct rpc_message msg = { 5029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5030 .rpc_argp = &args, 5031 .rpc_resp = &res, 5032 }; 5033 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1; 5034 int ret = -ENOMEM, i; 5035 5036 if (npages > ARRAY_SIZE(pages)) 5037 return -ERANGE; 5038 5039 for (i = 0; i < npages; i++) { 5040 pages[i] = alloc_page(GFP_KERNEL); 5041 if (!pages[i]) 5042 goto out_free; 5043 } 5044 5045 /* for decoding across pages */ 5046 res.acl_scratch = alloc_page(GFP_KERNEL); 5047 if (!res.acl_scratch) 5048 goto out_free; 5049 5050 args.acl_len = npages * PAGE_SIZE; 5051 5052 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 5053 __func__, buf, buflen, npages, args.acl_len); 5054 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 5055 &msg, &args.seq_args, &res.seq_res, 0); 5056 if (ret) 5057 goto out_free; 5058 5059 /* Handle the case where the passed-in buffer is too short */ 5060 if (res.acl_flags & NFS4_ACL_TRUNC) { 5061 /* Did the user only issue a request for the acl length? */ 5062 if (buf == NULL) 5063 goto out_ok; 5064 ret = -ERANGE; 5065 goto out_free; 5066 } 5067 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 5068 if (buf) { 5069 if (res.acl_len > buflen) { 5070 ret = -ERANGE; 5071 goto out_free; 5072 } 5073 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 5074 } 5075 out_ok: 5076 ret = res.acl_len; 5077 out_free: 5078 for (i = 0; i < npages; i++) 5079 if (pages[i]) 5080 __free_page(pages[i]); 5081 if (res.acl_scratch) 5082 __free_page(res.acl_scratch); 5083 return ret; 5084 } 5085 5086 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5087 { 5088 struct nfs4_exception exception = { }; 5089 ssize_t ret; 5090 do { 5091 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 5092 trace_nfs4_get_acl(inode, ret); 5093 if (ret >= 0) 5094 break; 5095 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 5096 } while (exception.retry); 5097 return ret; 5098 } 5099 5100 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 5101 { 5102 struct nfs_server *server = NFS_SERVER(inode); 5103 int ret; 5104 5105 if (!nfs4_server_supports_acls(server)) 5106 return -EOPNOTSUPP; 5107 ret = nfs_revalidate_inode(server, inode); 5108 if (ret < 0) 5109 return ret; 5110 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 5111 nfs_zap_acl_cache(inode); 5112 ret = nfs4_read_cached_acl(inode, buf, buflen); 5113 if (ret != -ENOENT) 5114 /* -ENOENT is returned if there is no ACL or if there is an ACL 5115 * but no cached acl data, just the acl length */ 5116 return ret; 5117 return nfs4_get_acl_uncached(inode, buf, buflen); 5118 } 5119 5120 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5121 { 5122 struct nfs_server *server = NFS_SERVER(inode); 5123 struct page *pages[NFS4ACL_MAXPAGES]; 5124 struct nfs_setaclargs arg = { 5125 .fh = NFS_FH(inode), 5126 .acl_pages = pages, 5127 .acl_len = buflen, 5128 }; 5129 struct nfs_setaclres res; 5130 struct rpc_message msg = { 5131 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 5132 .rpc_argp = &arg, 5133 .rpc_resp = &res, 5134 }; 5135 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 5136 int ret, i; 5137 5138 if (!nfs4_server_supports_acls(server)) 5139 return -EOPNOTSUPP; 5140 if (npages > ARRAY_SIZE(pages)) 5141 return -ERANGE; 5142 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages); 5143 if (i < 0) 5144 return i; 5145 nfs4_inode_return_delegation(inode); 5146 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5147 5148 /* 5149 * Free each page after tx, so the only ref left is 5150 * held by the network stack 5151 */ 5152 for (; i > 0; i--) 5153 put_page(pages[i-1]); 5154 5155 /* 5156 * Acl update can result in inode attribute update. 5157 * so mark the attribute cache invalid. 5158 */ 5159 spin_lock(&inode->i_lock); 5160 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; 5161 spin_unlock(&inode->i_lock); 5162 nfs_access_zap_cache(inode); 5163 nfs_zap_acl_cache(inode); 5164 return ret; 5165 } 5166 5167 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5168 { 5169 struct nfs4_exception exception = { }; 5170 int err; 5171 do { 5172 err = __nfs4_proc_set_acl(inode, buf, buflen); 5173 trace_nfs4_set_acl(inode, err); 5174 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5175 &exception); 5176 } while (exception.retry); 5177 return err; 5178 } 5179 5180 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 5181 static int _nfs4_get_security_label(struct inode *inode, void *buf, 5182 size_t buflen) 5183 { 5184 struct nfs_server *server = NFS_SERVER(inode); 5185 struct nfs_fattr fattr; 5186 struct nfs4_label label = {0, 0, buflen, buf}; 5187 5188 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5189 struct nfs4_getattr_arg arg = { 5190 .fh = NFS_FH(inode), 5191 .bitmask = bitmask, 5192 }; 5193 struct nfs4_getattr_res res = { 5194 .fattr = &fattr, 5195 .label = &label, 5196 .server = server, 5197 }; 5198 struct rpc_message msg = { 5199 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 5200 .rpc_argp = &arg, 5201 .rpc_resp = &res, 5202 }; 5203 int ret; 5204 5205 nfs_fattr_init(&fattr); 5206 5207 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 5208 if (ret) 5209 return ret; 5210 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 5211 return -ENOENT; 5212 if (buflen < label.len) 5213 return -ERANGE; 5214 return 0; 5215 } 5216 5217 static int nfs4_get_security_label(struct inode *inode, void *buf, 5218 size_t buflen) 5219 { 5220 struct nfs4_exception exception = { }; 5221 int err; 5222 5223 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 5224 return -EOPNOTSUPP; 5225 5226 do { 5227 err = _nfs4_get_security_label(inode, buf, buflen); 5228 trace_nfs4_get_security_label(inode, err); 5229 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5230 &exception); 5231 } while (exception.retry); 5232 return err; 5233 } 5234 5235 static int _nfs4_do_set_security_label(struct inode *inode, 5236 struct nfs4_label *ilabel, 5237 struct nfs_fattr *fattr, 5238 struct nfs4_label *olabel) 5239 { 5240 5241 struct iattr sattr = {0}; 5242 struct nfs_server *server = NFS_SERVER(inode); 5243 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5244 struct nfs_setattrargs arg = { 5245 .fh = NFS_FH(inode), 5246 .iap = &sattr, 5247 .server = server, 5248 .bitmask = bitmask, 5249 .label = ilabel, 5250 }; 5251 struct nfs_setattrres res = { 5252 .fattr = fattr, 5253 .label = olabel, 5254 .server = server, 5255 }; 5256 struct rpc_message msg = { 5257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 5258 .rpc_argp = &arg, 5259 .rpc_resp = &res, 5260 }; 5261 int status; 5262 5263 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 5264 5265 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5266 if (status) 5267 dprintk("%s failed: %d\n", __func__, status); 5268 5269 return status; 5270 } 5271 5272 static int nfs4_do_set_security_label(struct inode *inode, 5273 struct nfs4_label *ilabel, 5274 struct nfs_fattr *fattr, 5275 struct nfs4_label *olabel) 5276 { 5277 struct nfs4_exception exception = { }; 5278 int err; 5279 5280 do { 5281 err = _nfs4_do_set_security_label(inode, ilabel, 5282 fattr, olabel); 5283 trace_nfs4_set_security_label(inode, err); 5284 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5285 &exception); 5286 } while (exception.retry); 5287 return err; 5288 } 5289 5290 static int 5291 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 5292 { 5293 struct nfs4_label ilabel, *olabel = NULL; 5294 struct nfs_fattr fattr; 5295 struct rpc_cred *cred; 5296 int status; 5297 5298 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 5299 return -EOPNOTSUPP; 5300 5301 nfs_fattr_init(&fattr); 5302 5303 ilabel.pi = 0; 5304 ilabel.lfs = 0; 5305 ilabel.label = (char *)buf; 5306 ilabel.len = buflen; 5307 5308 cred = rpc_lookup_cred(); 5309 if (IS_ERR(cred)) 5310 return PTR_ERR(cred); 5311 5312 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 5313 if (IS_ERR(olabel)) { 5314 status = -PTR_ERR(olabel); 5315 goto out; 5316 } 5317 5318 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); 5319 if (status == 0) 5320 nfs_setsecurity(inode, &fattr, olabel); 5321 5322 nfs4_label_free(olabel); 5323 out: 5324 put_rpccred(cred); 5325 return status; 5326 } 5327 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 5328 5329 5330 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 5331 nfs4_verifier *bootverf) 5332 { 5333 __be32 verf[2]; 5334 5335 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 5336 /* An impossible timestamp guarantees this value 5337 * will never match a generated boot time. */ 5338 verf[0] = cpu_to_be32(U32_MAX); 5339 verf[1] = cpu_to_be32(U32_MAX); 5340 } else { 5341 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 5342 u64 ns = ktime_to_ns(nn->boot_time); 5343 5344 verf[0] = cpu_to_be32(ns >> 32); 5345 verf[1] = cpu_to_be32(ns); 5346 } 5347 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 5348 } 5349 5350 static int 5351 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 5352 { 5353 size_t len; 5354 char *str; 5355 5356 if (clp->cl_owner_id != NULL) 5357 return 0; 5358 5359 rcu_read_lock(); 5360 len = 14 + strlen(clp->cl_ipaddr) + 1 + 5361 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 5362 1 + 5363 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) + 5364 1; 5365 rcu_read_unlock(); 5366 5367 if (len > NFS4_OPAQUE_LIMIT + 1) 5368 return -EINVAL; 5369 5370 /* 5371 * Since this string is allocated at mount time, and held until the 5372 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5373 * about a memory-reclaim deadlock. 5374 */ 5375 str = kmalloc(len, GFP_KERNEL); 5376 if (!str) 5377 return -ENOMEM; 5378 5379 rcu_read_lock(); 5380 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s", 5381 clp->cl_ipaddr, 5382 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR), 5383 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)); 5384 rcu_read_unlock(); 5385 5386 clp->cl_owner_id = str; 5387 return 0; 5388 } 5389 5390 static int 5391 nfs4_init_uniquifier_client_string(struct nfs_client *clp) 5392 { 5393 size_t len; 5394 char *str; 5395 5396 len = 10 + 10 + 1 + 10 + 1 + 5397 strlen(nfs4_client_id_uniquifier) + 1 + 5398 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5399 5400 if (len > NFS4_OPAQUE_LIMIT + 1) 5401 return -EINVAL; 5402 5403 /* 5404 * Since this string is allocated at mount time, and held until the 5405 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5406 * about a memory-reclaim deadlock. 5407 */ 5408 str = kmalloc(len, GFP_KERNEL); 5409 if (!str) 5410 return -ENOMEM; 5411 5412 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 5413 clp->rpc_ops->version, clp->cl_minorversion, 5414 nfs4_client_id_uniquifier, 5415 clp->cl_rpcclient->cl_nodename); 5416 clp->cl_owner_id = str; 5417 return 0; 5418 } 5419 5420 static int 5421 nfs4_init_uniform_client_string(struct nfs_client *clp) 5422 { 5423 size_t len; 5424 char *str; 5425 5426 if (clp->cl_owner_id != NULL) 5427 return 0; 5428 5429 if (nfs4_client_id_uniquifier[0] != '\0') 5430 return nfs4_init_uniquifier_client_string(clp); 5431 5432 len = 10 + 10 + 1 + 10 + 1 + 5433 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5434 5435 if (len > NFS4_OPAQUE_LIMIT + 1) 5436 return -EINVAL; 5437 5438 /* 5439 * Since this string is allocated at mount time, and held until the 5440 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5441 * about a memory-reclaim deadlock. 5442 */ 5443 str = kmalloc(len, GFP_KERNEL); 5444 if (!str) 5445 return -ENOMEM; 5446 5447 scnprintf(str, len, "Linux NFSv%u.%u %s", 5448 clp->rpc_ops->version, clp->cl_minorversion, 5449 clp->cl_rpcclient->cl_nodename); 5450 clp->cl_owner_id = str; 5451 return 0; 5452 } 5453 5454 /* 5455 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 5456 * services. Advertise one based on the address family of the 5457 * clientaddr. 5458 */ 5459 static unsigned int 5460 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 5461 { 5462 if (strchr(clp->cl_ipaddr, ':') != NULL) 5463 return scnprintf(buf, len, "tcp6"); 5464 else 5465 return scnprintf(buf, len, "tcp"); 5466 } 5467 5468 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 5469 { 5470 struct nfs4_setclientid *sc = calldata; 5471 5472 if (task->tk_status == 0) 5473 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 5474 } 5475 5476 static const struct rpc_call_ops nfs4_setclientid_ops = { 5477 .rpc_call_done = nfs4_setclientid_done, 5478 }; 5479 5480 /** 5481 * nfs4_proc_setclientid - Negotiate client ID 5482 * @clp: state data structure 5483 * @program: RPC program for NFSv4 callback service 5484 * @port: IP port number for NFS4 callback service 5485 * @cred: RPC credential to use for this call 5486 * @res: where to place the result 5487 * 5488 * Returns zero, a negative errno, or a negative NFS4ERR status code. 5489 */ 5490 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 5491 unsigned short port, struct rpc_cred *cred, 5492 struct nfs4_setclientid_res *res) 5493 { 5494 nfs4_verifier sc_verifier; 5495 struct nfs4_setclientid setclientid = { 5496 .sc_verifier = &sc_verifier, 5497 .sc_prog = program, 5498 .sc_clnt = clp, 5499 }; 5500 struct rpc_message msg = { 5501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 5502 .rpc_argp = &setclientid, 5503 .rpc_resp = res, 5504 .rpc_cred = cred, 5505 }; 5506 struct rpc_task *task; 5507 struct rpc_task_setup task_setup_data = { 5508 .rpc_client = clp->cl_rpcclient, 5509 .rpc_message = &msg, 5510 .callback_ops = &nfs4_setclientid_ops, 5511 .callback_data = &setclientid, 5512 .flags = RPC_TASK_TIMEOUT, 5513 }; 5514 int status; 5515 5516 /* nfs_client_id4 */ 5517 nfs4_init_boot_verifier(clp, &sc_verifier); 5518 5519 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 5520 status = nfs4_init_uniform_client_string(clp); 5521 else 5522 status = nfs4_init_nonuniform_client_string(clp); 5523 5524 if (status) 5525 goto out; 5526 5527 /* cb_client4 */ 5528 setclientid.sc_netid_len = 5529 nfs4_init_callback_netid(clp, 5530 setclientid.sc_netid, 5531 sizeof(setclientid.sc_netid)); 5532 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 5533 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 5534 clp->cl_ipaddr, port >> 8, port & 255); 5535 5536 dprintk("NFS call setclientid auth=%s, '%s'\n", 5537 clp->cl_rpcclient->cl_auth->au_ops->au_name, 5538 clp->cl_owner_id); 5539 task = rpc_run_task(&task_setup_data); 5540 if (IS_ERR(task)) { 5541 status = PTR_ERR(task); 5542 goto out; 5543 } 5544 status = task->tk_status; 5545 if (setclientid.sc_cred) { 5546 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 5547 put_rpccred(setclientid.sc_cred); 5548 } 5549 rpc_put_task(task); 5550 out: 5551 trace_nfs4_setclientid(clp, status); 5552 dprintk("NFS reply setclientid: %d\n", status); 5553 return status; 5554 } 5555 5556 /** 5557 * nfs4_proc_setclientid_confirm - Confirm client ID 5558 * @clp: state data structure 5559 * @res: result of a previous SETCLIENTID 5560 * @cred: RPC credential to use for this call 5561 * 5562 * Returns zero, a negative errno, or a negative NFS4ERR status code. 5563 */ 5564 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 5565 struct nfs4_setclientid_res *arg, 5566 struct rpc_cred *cred) 5567 { 5568 struct rpc_message msg = { 5569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 5570 .rpc_argp = arg, 5571 .rpc_cred = cred, 5572 }; 5573 int status; 5574 5575 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 5576 clp->cl_rpcclient->cl_auth->au_ops->au_name, 5577 clp->cl_clientid); 5578 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5579 trace_nfs4_setclientid_confirm(clp, status); 5580 dprintk("NFS reply setclientid_confirm: %d\n", status); 5581 return status; 5582 } 5583 5584 struct nfs4_delegreturndata { 5585 struct nfs4_delegreturnargs args; 5586 struct nfs4_delegreturnres res; 5587 struct nfs_fh fh; 5588 nfs4_stateid stateid; 5589 unsigned long timestamp; 5590 struct { 5591 struct nfs4_layoutreturn_args arg; 5592 struct nfs4_layoutreturn_res res; 5593 struct nfs4_xdr_opaque_data ld_private; 5594 u32 roc_barrier; 5595 bool roc; 5596 } lr; 5597 struct nfs_fattr fattr; 5598 int rpc_status; 5599 struct inode *inode; 5600 }; 5601 5602 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 5603 { 5604 struct nfs4_delegreturndata *data = calldata; 5605 5606 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5607 return; 5608 5609 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 5610 5611 /* Handle Layoutreturn errors */ 5612 if (data->args.lr_args && task->tk_status != 0) { 5613 switch(data->res.lr_ret) { 5614 default: 5615 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 5616 break; 5617 case 0: 5618 data->args.lr_args = NULL; 5619 data->res.lr_res = NULL; 5620 break; 5621 case -NFS4ERR_ADMIN_REVOKED: 5622 case -NFS4ERR_DELEG_REVOKED: 5623 case -NFS4ERR_EXPIRED: 5624 case -NFS4ERR_BAD_STATEID: 5625 case -NFS4ERR_OLD_STATEID: 5626 case -NFS4ERR_UNKNOWN_LAYOUTTYPE: 5627 case -NFS4ERR_WRONG_CRED: 5628 data->args.lr_args = NULL; 5629 data->res.lr_res = NULL; 5630 data->res.lr_ret = 0; 5631 rpc_restart_call_prepare(task); 5632 return; 5633 } 5634 } 5635 5636 switch (task->tk_status) { 5637 case 0: 5638 renew_lease(data->res.server, data->timestamp); 5639 break; 5640 case -NFS4ERR_ADMIN_REVOKED: 5641 case -NFS4ERR_DELEG_REVOKED: 5642 case -NFS4ERR_EXPIRED: 5643 nfs4_free_revoked_stateid(data->res.server, 5644 data->args.stateid, 5645 task->tk_msg.rpc_cred); 5646 case -NFS4ERR_BAD_STATEID: 5647 case -NFS4ERR_OLD_STATEID: 5648 case -NFS4ERR_STALE_STATEID: 5649 task->tk_status = 0; 5650 break; 5651 case -NFS4ERR_ACCESS: 5652 if (data->args.bitmask) { 5653 data->args.bitmask = NULL; 5654 data->res.fattr = NULL; 5655 task->tk_status = 0; 5656 rpc_restart_call_prepare(task); 5657 return; 5658 } 5659 default: 5660 if (nfs4_async_handle_error(task, data->res.server, 5661 NULL, NULL) == -EAGAIN) { 5662 rpc_restart_call_prepare(task); 5663 return; 5664 } 5665 } 5666 data->rpc_status = task->tk_status; 5667 } 5668 5669 static void nfs4_delegreturn_release(void *calldata) 5670 { 5671 struct nfs4_delegreturndata *data = calldata; 5672 struct inode *inode = data->inode; 5673 5674 if (inode) { 5675 if (data->lr.roc) 5676 pnfs_roc_release(&data->lr.arg, &data->lr.res, 5677 data->res.lr_ret); 5678 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 5679 nfs_iput_and_deactive(inode); 5680 } 5681 kfree(calldata); 5682 } 5683 5684 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 5685 { 5686 struct nfs4_delegreturndata *d_data; 5687 5688 d_data = (struct nfs4_delegreturndata *)data; 5689 5690 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task)) 5691 return; 5692 5693 nfs4_setup_sequence(d_data->res.server->nfs_client, 5694 &d_data->args.seq_args, 5695 &d_data->res.seq_res, 5696 task); 5697 } 5698 5699 static const struct rpc_call_ops nfs4_delegreturn_ops = { 5700 .rpc_call_prepare = nfs4_delegreturn_prepare, 5701 .rpc_call_done = nfs4_delegreturn_done, 5702 .rpc_release = nfs4_delegreturn_release, 5703 }; 5704 5705 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 5706 { 5707 struct nfs4_delegreturndata *data; 5708 struct nfs_server *server = NFS_SERVER(inode); 5709 struct rpc_task *task; 5710 struct rpc_message msg = { 5711 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 5712 .rpc_cred = cred, 5713 }; 5714 struct rpc_task_setup task_setup_data = { 5715 .rpc_client = server->client, 5716 .rpc_message = &msg, 5717 .callback_ops = &nfs4_delegreturn_ops, 5718 .flags = RPC_TASK_ASYNC, 5719 }; 5720 int status = 0; 5721 5722 data = kzalloc(sizeof(*data), GFP_NOFS); 5723 if (data == NULL) 5724 return -ENOMEM; 5725 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 5726 5727 nfs4_state_protect(server->nfs_client, 5728 NFS_SP4_MACH_CRED_CLEANUP, 5729 &task_setup_data.rpc_client, &msg); 5730 5731 data->args.fhandle = &data->fh; 5732 data->args.stateid = &data->stateid; 5733 data->args.bitmask = server->cache_consistency_bitmask; 5734 nfs_copy_fh(&data->fh, NFS_FH(inode)); 5735 nfs4_stateid_copy(&data->stateid, stateid); 5736 data->res.fattr = &data->fattr; 5737 data->res.server = server; 5738 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT; 5739 data->lr.arg.ld_private = &data->lr.ld_private; 5740 nfs_fattr_init(data->res.fattr); 5741 data->timestamp = jiffies; 5742 data->rpc_status = 0; 5743 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred); 5744 data->inode = nfs_igrab_and_active(inode); 5745 if (data->inode) { 5746 if (data->lr.roc) { 5747 data->args.lr_args = &data->lr.arg; 5748 data->res.lr_res = &data->lr.res; 5749 } 5750 } else if (data->lr.roc) { 5751 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0); 5752 data->lr.roc = false; 5753 } 5754 5755 task_setup_data.callback_data = data; 5756 msg.rpc_argp = &data->args; 5757 msg.rpc_resp = &data->res; 5758 task = rpc_run_task(&task_setup_data); 5759 if (IS_ERR(task)) 5760 return PTR_ERR(task); 5761 if (!issync) 5762 goto out; 5763 status = rpc_wait_for_completion_task(task); 5764 if (status != 0) 5765 goto out; 5766 status = data->rpc_status; 5767 out: 5768 rpc_put_task(task); 5769 return status; 5770 } 5771 5772 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 5773 { 5774 struct nfs_server *server = NFS_SERVER(inode); 5775 struct nfs4_exception exception = { }; 5776 int err; 5777 do { 5778 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 5779 trace_nfs4_delegreturn(inode, stateid, err); 5780 switch (err) { 5781 case -NFS4ERR_STALE_STATEID: 5782 case -NFS4ERR_EXPIRED: 5783 case 0: 5784 return 0; 5785 } 5786 err = nfs4_handle_exception(server, err, &exception); 5787 } while (exception.retry); 5788 return err; 5789 } 5790 5791 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5792 { 5793 struct inode *inode = state->inode; 5794 struct nfs_server *server = NFS_SERVER(inode); 5795 struct nfs_client *clp = server->nfs_client; 5796 struct nfs_lockt_args arg = { 5797 .fh = NFS_FH(inode), 5798 .fl = request, 5799 }; 5800 struct nfs_lockt_res res = { 5801 .denied = request, 5802 }; 5803 struct rpc_message msg = { 5804 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 5805 .rpc_argp = &arg, 5806 .rpc_resp = &res, 5807 .rpc_cred = state->owner->so_cred, 5808 }; 5809 struct nfs4_lock_state *lsp; 5810 int status; 5811 5812 arg.lock_owner.clientid = clp->cl_clientid; 5813 status = nfs4_set_lock_state(state, request); 5814 if (status != 0) 5815 goto out; 5816 lsp = request->fl_u.nfs4_fl.owner; 5817 arg.lock_owner.id = lsp->ls_seqid.owner_id; 5818 arg.lock_owner.s_dev = server->s_dev; 5819 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5820 switch (status) { 5821 case 0: 5822 request->fl_type = F_UNLCK; 5823 break; 5824 case -NFS4ERR_DENIED: 5825 status = 0; 5826 } 5827 request->fl_ops->fl_release_private(request); 5828 request->fl_ops = NULL; 5829 out: 5830 return status; 5831 } 5832 5833 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5834 { 5835 struct nfs4_exception exception = { }; 5836 int err; 5837 5838 do { 5839 err = _nfs4_proc_getlk(state, cmd, request); 5840 trace_nfs4_get_lock(request, state, cmd, err); 5841 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 5842 &exception); 5843 } while (exception.retry); 5844 return err; 5845 } 5846 5847 struct nfs4_unlockdata { 5848 struct nfs_locku_args arg; 5849 struct nfs_locku_res res; 5850 struct nfs4_lock_state *lsp; 5851 struct nfs_open_context *ctx; 5852 struct nfs_lock_context *l_ctx; 5853 struct file_lock fl; 5854 struct nfs_server *server; 5855 unsigned long timestamp; 5856 }; 5857 5858 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 5859 struct nfs_open_context *ctx, 5860 struct nfs4_lock_state *lsp, 5861 struct nfs_seqid *seqid) 5862 { 5863 struct nfs4_unlockdata *p; 5864 struct inode *inode = lsp->ls_state->inode; 5865 5866 p = kzalloc(sizeof(*p), GFP_NOFS); 5867 if (p == NULL) 5868 return NULL; 5869 p->arg.fh = NFS_FH(inode); 5870 p->arg.fl = &p->fl; 5871 p->arg.seqid = seqid; 5872 p->res.seqid = seqid; 5873 p->lsp = lsp; 5874 atomic_inc(&lsp->ls_count); 5875 /* Ensure we don't close file until we're done freeing locks! */ 5876 p->ctx = get_nfs_open_context(ctx); 5877 p->l_ctx = nfs_get_lock_context(ctx); 5878 memcpy(&p->fl, fl, sizeof(p->fl)); 5879 p->server = NFS_SERVER(inode); 5880 return p; 5881 } 5882 5883 static void nfs4_locku_release_calldata(void *data) 5884 { 5885 struct nfs4_unlockdata *calldata = data; 5886 nfs_free_seqid(calldata->arg.seqid); 5887 nfs4_put_lock_state(calldata->lsp); 5888 nfs_put_lock_context(calldata->l_ctx); 5889 put_nfs_open_context(calldata->ctx); 5890 kfree(calldata); 5891 } 5892 5893 static void nfs4_locku_done(struct rpc_task *task, void *data) 5894 { 5895 struct nfs4_unlockdata *calldata = data; 5896 5897 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 5898 return; 5899 switch (task->tk_status) { 5900 case 0: 5901 renew_lease(calldata->server, calldata->timestamp); 5902 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 5903 if (nfs4_update_lock_stateid(calldata->lsp, 5904 &calldata->res.stateid)) 5905 break; 5906 case -NFS4ERR_ADMIN_REVOKED: 5907 case -NFS4ERR_EXPIRED: 5908 nfs4_free_revoked_stateid(calldata->server, 5909 &calldata->arg.stateid, 5910 task->tk_msg.rpc_cred); 5911 case -NFS4ERR_BAD_STATEID: 5912 case -NFS4ERR_OLD_STATEID: 5913 case -NFS4ERR_STALE_STATEID: 5914 if (!nfs4_stateid_match(&calldata->arg.stateid, 5915 &calldata->lsp->ls_stateid)) 5916 rpc_restart_call_prepare(task); 5917 break; 5918 default: 5919 if (nfs4_async_handle_error(task, calldata->server, 5920 NULL, NULL) == -EAGAIN) 5921 rpc_restart_call_prepare(task); 5922 } 5923 nfs_release_seqid(calldata->arg.seqid); 5924 } 5925 5926 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 5927 { 5928 struct nfs4_unlockdata *calldata = data; 5929 5930 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) && 5931 nfs_async_iocounter_wait(task, calldata->l_ctx)) 5932 return; 5933 5934 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 5935 goto out_wait; 5936 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid); 5937 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 5938 /* Note: exit _without_ running nfs4_locku_done */ 5939 goto out_no_action; 5940 } 5941 calldata->timestamp = jiffies; 5942 if (nfs4_setup_sequence(calldata->server->nfs_client, 5943 &calldata->arg.seq_args, 5944 &calldata->res.seq_res, 5945 task) != 0) 5946 nfs_release_seqid(calldata->arg.seqid); 5947 return; 5948 out_no_action: 5949 task->tk_action = NULL; 5950 out_wait: 5951 nfs4_sequence_done(task, &calldata->res.seq_res); 5952 } 5953 5954 static const struct rpc_call_ops nfs4_locku_ops = { 5955 .rpc_call_prepare = nfs4_locku_prepare, 5956 .rpc_call_done = nfs4_locku_done, 5957 .rpc_release = nfs4_locku_release_calldata, 5958 }; 5959 5960 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 5961 struct nfs_open_context *ctx, 5962 struct nfs4_lock_state *lsp, 5963 struct nfs_seqid *seqid) 5964 { 5965 struct nfs4_unlockdata *data; 5966 struct rpc_message msg = { 5967 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 5968 .rpc_cred = ctx->cred, 5969 }; 5970 struct rpc_task_setup task_setup_data = { 5971 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 5972 .rpc_message = &msg, 5973 .callback_ops = &nfs4_locku_ops, 5974 .workqueue = nfsiod_workqueue, 5975 .flags = RPC_TASK_ASYNC, 5976 }; 5977 5978 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 5979 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 5980 5981 /* Ensure this is an unlock - when canceling a lock, the 5982 * canceled lock is passed in, and it won't be an unlock. 5983 */ 5984 fl->fl_type = F_UNLCK; 5985 if (fl->fl_flags & FL_CLOSE) 5986 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags); 5987 5988 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 5989 if (data == NULL) { 5990 nfs_free_seqid(seqid); 5991 return ERR_PTR(-ENOMEM); 5992 } 5993 5994 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); 5995 msg.rpc_argp = &data->arg; 5996 msg.rpc_resp = &data->res; 5997 task_setup_data.callback_data = data; 5998 return rpc_run_task(&task_setup_data); 5999 } 6000 6001 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 6002 { 6003 struct inode *inode = state->inode; 6004 struct nfs4_state_owner *sp = state->owner; 6005 struct nfs_inode *nfsi = NFS_I(inode); 6006 struct nfs_seqid *seqid; 6007 struct nfs4_lock_state *lsp; 6008 struct rpc_task *task; 6009 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6010 int status = 0; 6011 unsigned char fl_flags = request->fl_flags; 6012 6013 status = nfs4_set_lock_state(state, request); 6014 /* Unlock _before_ we do the RPC call */ 6015 request->fl_flags |= FL_EXISTS; 6016 /* Exclude nfs_delegation_claim_locks() */ 6017 mutex_lock(&sp->so_delegreturn_mutex); 6018 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 6019 down_read(&nfsi->rwsem); 6020 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 6021 up_read(&nfsi->rwsem); 6022 mutex_unlock(&sp->so_delegreturn_mutex); 6023 goto out; 6024 } 6025 up_read(&nfsi->rwsem); 6026 mutex_unlock(&sp->so_delegreturn_mutex); 6027 if (status != 0) 6028 goto out; 6029 /* Is this a delegated lock? */ 6030 lsp = request->fl_u.nfs4_fl.owner; 6031 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 6032 goto out; 6033 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 6034 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 6035 status = -ENOMEM; 6036 if (IS_ERR(seqid)) 6037 goto out; 6038 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 6039 status = PTR_ERR(task); 6040 if (IS_ERR(task)) 6041 goto out; 6042 status = rpc_wait_for_completion_task(task); 6043 rpc_put_task(task); 6044 out: 6045 request->fl_flags = fl_flags; 6046 trace_nfs4_unlock(request, state, F_SETLK, status); 6047 return status; 6048 } 6049 6050 struct nfs4_lockdata { 6051 struct nfs_lock_args arg; 6052 struct nfs_lock_res res; 6053 struct nfs4_lock_state *lsp; 6054 struct nfs_open_context *ctx; 6055 struct file_lock fl; 6056 unsigned long timestamp; 6057 int rpc_status; 6058 int cancelled; 6059 struct nfs_server *server; 6060 }; 6061 6062 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 6063 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 6064 gfp_t gfp_mask) 6065 { 6066 struct nfs4_lockdata *p; 6067 struct inode *inode = lsp->ls_state->inode; 6068 struct nfs_server *server = NFS_SERVER(inode); 6069 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 6070 6071 p = kzalloc(sizeof(*p), gfp_mask); 6072 if (p == NULL) 6073 return NULL; 6074 6075 p->arg.fh = NFS_FH(inode); 6076 p->arg.fl = &p->fl; 6077 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 6078 if (IS_ERR(p->arg.open_seqid)) 6079 goto out_free; 6080 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 6081 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 6082 if (IS_ERR(p->arg.lock_seqid)) 6083 goto out_free_seqid; 6084 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 6085 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 6086 p->arg.lock_owner.s_dev = server->s_dev; 6087 p->res.lock_seqid = p->arg.lock_seqid; 6088 p->lsp = lsp; 6089 p->server = server; 6090 atomic_inc(&lsp->ls_count); 6091 p->ctx = get_nfs_open_context(ctx); 6092 memcpy(&p->fl, fl, sizeof(p->fl)); 6093 return p; 6094 out_free_seqid: 6095 nfs_free_seqid(p->arg.open_seqid); 6096 out_free: 6097 kfree(p); 6098 return NULL; 6099 } 6100 6101 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 6102 { 6103 struct nfs4_lockdata *data = calldata; 6104 struct nfs4_state *state = data->lsp->ls_state; 6105 6106 dprintk("%s: begin!\n", __func__); 6107 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 6108 goto out_wait; 6109 /* Do we need to do an open_to_lock_owner? */ 6110 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 6111 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 6112 goto out_release_lock_seqid; 6113 } 6114 nfs4_stateid_copy(&data->arg.open_stateid, 6115 &state->open_stateid); 6116 data->arg.new_lock_owner = 1; 6117 data->res.open_seqid = data->arg.open_seqid; 6118 } else { 6119 data->arg.new_lock_owner = 0; 6120 nfs4_stateid_copy(&data->arg.lock_stateid, 6121 &data->lsp->ls_stateid); 6122 } 6123 if (!nfs4_valid_open_stateid(state)) { 6124 data->rpc_status = -EBADF; 6125 task->tk_action = NULL; 6126 goto out_release_open_seqid; 6127 } 6128 data->timestamp = jiffies; 6129 if (nfs4_setup_sequence(data->server->nfs_client, 6130 &data->arg.seq_args, 6131 &data->res.seq_res, 6132 task) == 0) 6133 return; 6134 out_release_open_seqid: 6135 nfs_release_seqid(data->arg.open_seqid); 6136 out_release_lock_seqid: 6137 nfs_release_seqid(data->arg.lock_seqid); 6138 out_wait: 6139 nfs4_sequence_done(task, &data->res.seq_res); 6140 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 6141 } 6142 6143 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 6144 { 6145 struct nfs4_lockdata *data = calldata; 6146 struct nfs4_lock_state *lsp = data->lsp; 6147 6148 dprintk("%s: begin!\n", __func__); 6149 6150 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6151 return; 6152 6153 data->rpc_status = task->tk_status; 6154 switch (task->tk_status) { 6155 case 0: 6156 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 6157 data->timestamp); 6158 if (data->arg.new_lock) { 6159 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 6160 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) { 6161 rpc_restart_call_prepare(task); 6162 break; 6163 } 6164 } 6165 if (data->arg.new_lock_owner != 0) { 6166 nfs_confirm_seqid(&lsp->ls_seqid, 0); 6167 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 6168 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 6169 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 6170 rpc_restart_call_prepare(task); 6171 break; 6172 case -NFS4ERR_BAD_STATEID: 6173 case -NFS4ERR_OLD_STATEID: 6174 case -NFS4ERR_STALE_STATEID: 6175 case -NFS4ERR_EXPIRED: 6176 if (data->arg.new_lock_owner != 0) { 6177 if (!nfs4_stateid_match(&data->arg.open_stateid, 6178 &lsp->ls_state->open_stateid)) 6179 rpc_restart_call_prepare(task); 6180 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 6181 &lsp->ls_stateid)) 6182 rpc_restart_call_prepare(task); 6183 } 6184 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 6185 } 6186 6187 static void nfs4_lock_release(void *calldata) 6188 { 6189 struct nfs4_lockdata *data = calldata; 6190 6191 dprintk("%s: begin!\n", __func__); 6192 nfs_free_seqid(data->arg.open_seqid); 6193 if (data->cancelled) { 6194 struct rpc_task *task; 6195 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 6196 data->arg.lock_seqid); 6197 if (!IS_ERR(task)) 6198 rpc_put_task_async(task); 6199 dprintk("%s: cancelling lock!\n", __func__); 6200 } else 6201 nfs_free_seqid(data->arg.lock_seqid); 6202 nfs4_put_lock_state(data->lsp); 6203 put_nfs_open_context(data->ctx); 6204 kfree(data); 6205 dprintk("%s: done!\n", __func__); 6206 } 6207 6208 static const struct rpc_call_ops nfs4_lock_ops = { 6209 .rpc_call_prepare = nfs4_lock_prepare, 6210 .rpc_call_done = nfs4_lock_done, 6211 .rpc_release = nfs4_lock_release, 6212 }; 6213 6214 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 6215 { 6216 switch (error) { 6217 case -NFS4ERR_ADMIN_REVOKED: 6218 case -NFS4ERR_EXPIRED: 6219 case -NFS4ERR_BAD_STATEID: 6220 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 6221 if (new_lock_owner != 0 || 6222 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 6223 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 6224 break; 6225 case -NFS4ERR_STALE_STATEID: 6226 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 6227 nfs4_schedule_lease_recovery(server->nfs_client); 6228 }; 6229 } 6230 6231 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 6232 { 6233 struct nfs4_lockdata *data; 6234 struct rpc_task *task; 6235 struct rpc_message msg = { 6236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 6237 .rpc_cred = state->owner->so_cred, 6238 }; 6239 struct rpc_task_setup task_setup_data = { 6240 .rpc_client = NFS_CLIENT(state->inode), 6241 .rpc_message = &msg, 6242 .callback_ops = &nfs4_lock_ops, 6243 .workqueue = nfsiod_workqueue, 6244 .flags = RPC_TASK_ASYNC, 6245 }; 6246 int ret; 6247 6248 dprintk("%s: begin!\n", __func__); 6249 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 6250 fl->fl_u.nfs4_fl.owner, 6251 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 6252 if (data == NULL) 6253 return -ENOMEM; 6254 if (IS_SETLKW(cmd)) 6255 data->arg.block = 1; 6256 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); 6257 msg.rpc_argp = &data->arg; 6258 msg.rpc_resp = &data->res; 6259 task_setup_data.callback_data = data; 6260 if (recovery_type > NFS_LOCK_NEW) { 6261 if (recovery_type == NFS_LOCK_RECLAIM) 6262 data->arg.reclaim = NFS_LOCK_RECLAIM; 6263 nfs4_set_sequence_privileged(&data->arg.seq_args); 6264 } else 6265 data->arg.new_lock = 1; 6266 task = rpc_run_task(&task_setup_data); 6267 if (IS_ERR(task)) 6268 return PTR_ERR(task); 6269 ret = rpc_wait_for_completion_task(task); 6270 if (ret == 0) { 6271 ret = data->rpc_status; 6272 if (ret) 6273 nfs4_handle_setlk_error(data->server, data->lsp, 6274 data->arg.new_lock_owner, ret); 6275 } else 6276 data->cancelled = true; 6277 rpc_put_task(task); 6278 dprintk("%s: done, ret = %d!\n", __func__, ret); 6279 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 6280 return ret; 6281 } 6282 6283 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 6284 { 6285 struct nfs_server *server = NFS_SERVER(state->inode); 6286 struct nfs4_exception exception = { 6287 .inode = state->inode, 6288 }; 6289 int err; 6290 6291 do { 6292 /* Cache the lock if possible... */ 6293 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 6294 return 0; 6295 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 6296 if (err != -NFS4ERR_DELAY) 6297 break; 6298 nfs4_handle_exception(server, err, &exception); 6299 } while (exception.retry); 6300 return err; 6301 } 6302 6303 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 6304 { 6305 struct nfs_server *server = NFS_SERVER(state->inode); 6306 struct nfs4_exception exception = { 6307 .inode = state->inode, 6308 }; 6309 int err; 6310 6311 err = nfs4_set_lock_state(state, request); 6312 if (err != 0) 6313 return err; 6314 if (!recover_lost_locks) { 6315 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 6316 return 0; 6317 } 6318 do { 6319 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 6320 return 0; 6321 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 6322 switch (err) { 6323 default: 6324 goto out; 6325 case -NFS4ERR_GRACE: 6326 case -NFS4ERR_DELAY: 6327 nfs4_handle_exception(server, err, &exception); 6328 err = 0; 6329 } 6330 } while (exception.retry); 6331 out: 6332 return err; 6333 } 6334 6335 #if defined(CONFIG_NFS_V4_1) 6336 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 6337 { 6338 struct nfs4_lock_state *lsp; 6339 int status; 6340 6341 status = nfs4_set_lock_state(state, request); 6342 if (status != 0) 6343 return status; 6344 lsp = request->fl_u.nfs4_fl.owner; 6345 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 6346 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 6347 return 0; 6348 return nfs4_lock_expired(state, request); 6349 } 6350 #endif 6351 6352 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6353 { 6354 struct nfs_inode *nfsi = NFS_I(state->inode); 6355 struct nfs4_state_owner *sp = state->owner; 6356 unsigned char fl_flags = request->fl_flags; 6357 int status; 6358 6359 request->fl_flags |= FL_ACCESS; 6360 status = locks_lock_inode_wait(state->inode, request); 6361 if (status < 0) 6362 goto out; 6363 mutex_lock(&sp->so_delegreturn_mutex); 6364 down_read(&nfsi->rwsem); 6365 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 6366 /* Yes: cache locks! */ 6367 /* ...but avoid races with delegation recall... */ 6368 request->fl_flags = fl_flags & ~FL_SLEEP; 6369 status = locks_lock_inode_wait(state->inode, request); 6370 up_read(&nfsi->rwsem); 6371 mutex_unlock(&sp->so_delegreturn_mutex); 6372 goto out; 6373 } 6374 up_read(&nfsi->rwsem); 6375 mutex_unlock(&sp->so_delegreturn_mutex); 6376 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 6377 out: 6378 request->fl_flags = fl_flags; 6379 return status; 6380 } 6381 6382 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6383 { 6384 struct nfs4_exception exception = { 6385 .state = state, 6386 .inode = state->inode, 6387 }; 6388 int err; 6389 6390 do { 6391 err = _nfs4_proc_setlk(state, cmd, request); 6392 if (err == -NFS4ERR_DENIED) 6393 err = -EAGAIN; 6394 err = nfs4_handle_exception(NFS_SERVER(state->inode), 6395 err, &exception); 6396 } while (exception.retry); 6397 return err; 6398 } 6399 6400 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 6401 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 6402 6403 static int 6404 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 6405 struct file_lock *request) 6406 { 6407 int status = -ERESTARTSYS; 6408 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 6409 6410 while(!signalled()) { 6411 status = nfs4_proc_setlk(state, cmd, request); 6412 if ((status != -EAGAIN) || IS_SETLK(cmd)) 6413 break; 6414 freezable_schedule_timeout_interruptible(timeout); 6415 timeout *= 2; 6416 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 6417 status = -ERESTARTSYS; 6418 } 6419 return status; 6420 } 6421 6422 #ifdef CONFIG_NFS_V4_1 6423 struct nfs4_lock_waiter { 6424 struct task_struct *task; 6425 struct inode *inode; 6426 struct nfs_lowner *owner; 6427 bool notified; 6428 }; 6429 6430 static int 6431 nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key) 6432 { 6433 int ret; 6434 struct cb_notify_lock_args *cbnl = key; 6435 struct nfs4_lock_waiter *waiter = wait->private; 6436 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 6437 *wowner = waiter->owner; 6438 6439 /* Only wake if the callback was for the same owner */ 6440 if (lowner->clientid != wowner->clientid || 6441 lowner->id != wowner->id || 6442 lowner->s_dev != wowner->s_dev) 6443 return 0; 6444 6445 /* Make sure it's for the right inode */ 6446 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 6447 return 0; 6448 6449 waiter->notified = true; 6450 6451 /* override "private" so we can use default_wake_function */ 6452 wait->private = waiter->task; 6453 ret = autoremove_wake_function(wait, mode, flags, key); 6454 wait->private = waiter; 6455 return ret; 6456 } 6457 6458 static int 6459 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6460 { 6461 int status = -ERESTARTSYS; 6462 unsigned long flags; 6463 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 6464 struct nfs_server *server = NFS_SERVER(state->inode); 6465 struct nfs_client *clp = server->nfs_client; 6466 wait_queue_head_t *q = &clp->cl_lock_waitq; 6467 struct nfs_lowner owner = { .clientid = clp->cl_clientid, 6468 .id = lsp->ls_seqid.owner_id, 6469 .s_dev = server->s_dev }; 6470 struct nfs4_lock_waiter waiter = { .task = current, 6471 .inode = state->inode, 6472 .owner = &owner, 6473 .notified = false }; 6474 wait_queue_entry_t wait; 6475 6476 /* Don't bother with waitqueue if we don't expect a callback */ 6477 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 6478 return nfs4_retry_setlk_simple(state, cmd, request); 6479 6480 init_wait(&wait); 6481 wait.private = &waiter; 6482 wait.func = nfs4_wake_lock_waiter; 6483 add_wait_queue(q, &wait); 6484 6485 while(!signalled()) { 6486 status = nfs4_proc_setlk(state, cmd, request); 6487 if ((status != -EAGAIN) || IS_SETLK(cmd)) 6488 break; 6489 6490 status = -ERESTARTSYS; 6491 spin_lock_irqsave(&q->lock, flags); 6492 if (waiter.notified) { 6493 spin_unlock_irqrestore(&q->lock, flags); 6494 continue; 6495 } 6496 set_current_state(TASK_INTERRUPTIBLE); 6497 spin_unlock_irqrestore(&q->lock, flags); 6498 6499 freezable_schedule_timeout(NFS4_LOCK_MAXTIMEOUT); 6500 } 6501 6502 finish_wait(q, &wait); 6503 return status; 6504 } 6505 #else /* !CONFIG_NFS_V4_1 */ 6506 static inline int 6507 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6508 { 6509 return nfs4_retry_setlk_simple(state, cmd, request); 6510 } 6511 #endif 6512 6513 static int 6514 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 6515 { 6516 struct nfs_open_context *ctx; 6517 struct nfs4_state *state; 6518 int status; 6519 6520 /* verify open state */ 6521 ctx = nfs_file_open_context(filp); 6522 state = ctx->state; 6523 6524 if (IS_GETLK(cmd)) { 6525 if (state != NULL) 6526 return nfs4_proc_getlk(state, F_GETLK, request); 6527 return 0; 6528 } 6529 6530 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 6531 return -EINVAL; 6532 6533 if (request->fl_type == F_UNLCK) { 6534 if (state != NULL) 6535 return nfs4_proc_unlck(state, cmd, request); 6536 return 0; 6537 } 6538 6539 if (state == NULL) 6540 return -ENOLCK; 6541 6542 if ((request->fl_flags & FL_POSIX) && 6543 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 6544 return -ENOLCK; 6545 6546 status = nfs4_set_lock_state(state, request); 6547 if (status != 0) 6548 return status; 6549 6550 return nfs4_retry_setlk(state, cmd, request); 6551 } 6552 6553 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 6554 { 6555 struct nfs_server *server = NFS_SERVER(state->inode); 6556 int err; 6557 6558 err = nfs4_set_lock_state(state, fl); 6559 if (err != 0) 6560 return err; 6561 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 6562 return nfs4_handle_delegation_recall_error(server, state, stateid, err); 6563 } 6564 6565 struct nfs_release_lockowner_data { 6566 struct nfs4_lock_state *lsp; 6567 struct nfs_server *server; 6568 struct nfs_release_lockowner_args args; 6569 struct nfs_release_lockowner_res res; 6570 unsigned long timestamp; 6571 }; 6572 6573 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 6574 { 6575 struct nfs_release_lockowner_data *data = calldata; 6576 struct nfs_server *server = data->server; 6577 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args, 6578 &data->res.seq_res, task); 6579 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 6580 data->timestamp = jiffies; 6581 } 6582 6583 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 6584 { 6585 struct nfs_release_lockowner_data *data = calldata; 6586 struct nfs_server *server = data->server; 6587 6588 nfs40_sequence_done(task, &data->res.seq_res); 6589 6590 switch (task->tk_status) { 6591 case 0: 6592 renew_lease(server, data->timestamp); 6593 break; 6594 case -NFS4ERR_STALE_CLIENTID: 6595 case -NFS4ERR_EXPIRED: 6596 nfs4_schedule_lease_recovery(server->nfs_client); 6597 break; 6598 case -NFS4ERR_LEASE_MOVED: 6599 case -NFS4ERR_DELAY: 6600 if (nfs4_async_handle_error(task, server, 6601 NULL, NULL) == -EAGAIN) 6602 rpc_restart_call_prepare(task); 6603 } 6604 } 6605 6606 static void nfs4_release_lockowner_release(void *calldata) 6607 { 6608 struct nfs_release_lockowner_data *data = calldata; 6609 nfs4_free_lock_state(data->server, data->lsp); 6610 kfree(calldata); 6611 } 6612 6613 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 6614 .rpc_call_prepare = nfs4_release_lockowner_prepare, 6615 .rpc_call_done = nfs4_release_lockowner_done, 6616 .rpc_release = nfs4_release_lockowner_release, 6617 }; 6618 6619 static void 6620 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 6621 { 6622 struct nfs_release_lockowner_data *data; 6623 struct rpc_message msg = { 6624 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 6625 }; 6626 6627 if (server->nfs_client->cl_mvops->minor_version != 0) 6628 return; 6629 6630 data = kmalloc(sizeof(*data), GFP_NOFS); 6631 if (!data) 6632 return; 6633 data->lsp = lsp; 6634 data->server = server; 6635 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 6636 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 6637 data->args.lock_owner.s_dev = server->s_dev; 6638 6639 msg.rpc_argp = &data->args; 6640 msg.rpc_resp = &data->res; 6641 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 6642 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 6643 } 6644 6645 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 6646 6647 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 6648 struct dentry *unused, struct inode *inode, 6649 const char *key, const void *buf, 6650 size_t buflen, int flags) 6651 { 6652 return nfs4_proc_set_acl(inode, buf, buflen); 6653 } 6654 6655 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 6656 struct dentry *unused, struct inode *inode, 6657 const char *key, void *buf, size_t buflen) 6658 { 6659 return nfs4_proc_get_acl(inode, buf, buflen); 6660 } 6661 6662 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 6663 { 6664 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 6665 } 6666 6667 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 6668 6669 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 6670 struct dentry *unused, struct inode *inode, 6671 const char *key, const void *buf, 6672 size_t buflen, int flags) 6673 { 6674 if (security_ismaclabel(key)) 6675 return nfs4_set_security_label(inode, buf, buflen); 6676 6677 return -EOPNOTSUPP; 6678 } 6679 6680 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 6681 struct dentry *unused, struct inode *inode, 6682 const char *key, void *buf, size_t buflen) 6683 { 6684 if (security_ismaclabel(key)) 6685 return nfs4_get_security_label(inode, buf, buflen); 6686 return -EOPNOTSUPP; 6687 } 6688 6689 static ssize_t 6690 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 6691 { 6692 int len = 0; 6693 6694 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 6695 len = security_inode_listsecurity(inode, list, list_len); 6696 if (list_len && len > list_len) 6697 return -ERANGE; 6698 } 6699 return len; 6700 } 6701 6702 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 6703 .prefix = XATTR_SECURITY_PREFIX, 6704 .get = nfs4_xattr_get_nfs4_label, 6705 .set = nfs4_xattr_set_nfs4_label, 6706 }; 6707 6708 #else 6709 6710 static ssize_t 6711 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 6712 { 6713 return 0; 6714 } 6715 6716 #endif 6717 6718 /* 6719 * nfs_fhget will use either the mounted_on_fileid or the fileid 6720 */ 6721 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 6722 { 6723 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 6724 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 6725 (fattr->valid & NFS_ATTR_FATTR_FSID) && 6726 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 6727 return; 6728 6729 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 6730 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 6731 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 6732 fattr->nlink = 2; 6733 } 6734 6735 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 6736 const struct qstr *name, 6737 struct nfs4_fs_locations *fs_locations, 6738 struct page *page) 6739 { 6740 struct nfs_server *server = NFS_SERVER(dir); 6741 u32 bitmask[3] = { 6742 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6743 }; 6744 struct nfs4_fs_locations_arg args = { 6745 .dir_fh = NFS_FH(dir), 6746 .name = name, 6747 .page = page, 6748 .bitmask = bitmask, 6749 }; 6750 struct nfs4_fs_locations_res res = { 6751 .fs_locations = fs_locations, 6752 }; 6753 struct rpc_message msg = { 6754 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6755 .rpc_argp = &args, 6756 .rpc_resp = &res, 6757 }; 6758 int status; 6759 6760 dprintk("%s: start\n", __func__); 6761 6762 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 6763 * is not supported */ 6764 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 6765 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID; 6766 else 6767 bitmask[0] |= FATTR4_WORD0_FILEID; 6768 6769 nfs_fattr_init(&fs_locations->fattr); 6770 fs_locations->server = server; 6771 fs_locations->nlocations = 0; 6772 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 6773 dprintk("%s: returned status = %d\n", __func__, status); 6774 return status; 6775 } 6776 6777 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 6778 const struct qstr *name, 6779 struct nfs4_fs_locations *fs_locations, 6780 struct page *page) 6781 { 6782 struct nfs4_exception exception = { }; 6783 int err; 6784 do { 6785 err = _nfs4_proc_fs_locations(client, dir, name, 6786 fs_locations, page); 6787 trace_nfs4_get_fs_locations(dir, name, err); 6788 err = nfs4_handle_exception(NFS_SERVER(dir), err, 6789 &exception); 6790 } while (exception.retry); 6791 return err; 6792 } 6793 6794 /* 6795 * This operation also signals the server that this client is 6796 * performing migration recovery. The server can stop returning 6797 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 6798 * appended to this compound to identify the client ID which is 6799 * performing recovery. 6800 */ 6801 static int _nfs40_proc_get_locations(struct inode *inode, 6802 struct nfs4_fs_locations *locations, 6803 struct page *page, struct rpc_cred *cred) 6804 { 6805 struct nfs_server *server = NFS_SERVER(inode); 6806 struct rpc_clnt *clnt = server->client; 6807 u32 bitmask[2] = { 6808 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6809 }; 6810 struct nfs4_fs_locations_arg args = { 6811 .clientid = server->nfs_client->cl_clientid, 6812 .fh = NFS_FH(inode), 6813 .page = page, 6814 .bitmask = bitmask, 6815 .migration = 1, /* skip LOOKUP */ 6816 .renew = 1, /* append RENEW */ 6817 }; 6818 struct nfs4_fs_locations_res res = { 6819 .fs_locations = locations, 6820 .migration = 1, 6821 .renew = 1, 6822 }; 6823 struct rpc_message msg = { 6824 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6825 .rpc_argp = &args, 6826 .rpc_resp = &res, 6827 .rpc_cred = cred, 6828 }; 6829 unsigned long now = jiffies; 6830 int status; 6831 6832 nfs_fattr_init(&locations->fattr); 6833 locations->server = server; 6834 locations->nlocations = 0; 6835 6836 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6837 nfs4_set_sequence_privileged(&args.seq_args); 6838 status = nfs4_call_sync_sequence(clnt, server, &msg, 6839 &args.seq_args, &res.seq_res); 6840 if (status) 6841 return status; 6842 6843 renew_lease(server, now); 6844 return 0; 6845 } 6846 6847 #ifdef CONFIG_NFS_V4_1 6848 6849 /* 6850 * This operation also signals the server that this client is 6851 * performing migration recovery. The server can stop asserting 6852 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 6853 * performing this operation is identified in the SEQUENCE 6854 * operation in this compound. 6855 * 6856 * When the client supports GETATTR(fs_locations_info), it can 6857 * be plumbed in here. 6858 */ 6859 static int _nfs41_proc_get_locations(struct inode *inode, 6860 struct nfs4_fs_locations *locations, 6861 struct page *page, struct rpc_cred *cred) 6862 { 6863 struct nfs_server *server = NFS_SERVER(inode); 6864 struct rpc_clnt *clnt = server->client; 6865 u32 bitmask[2] = { 6866 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6867 }; 6868 struct nfs4_fs_locations_arg args = { 6869 .fh = NFS_FH(inode), 6870 .page = page, 6871 .bitmask = bitmask, 6872 .migration = 1, /* skip LOOKUP */ 6873 }; 6874 struct nfs4_fs_locations_res res = { 6875 .fs_locations = locations, 6876 .migration = 1, 6877 }; 6878 struct rpc_message msg = { 6879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6880 .rpc_argp = &args, 6881 .rpc_resp = &res, 6882 .rpc_cred = cred, 6883 }; 6884 int status; 6885 6886 nfs_fattr_init(&locations->fattr); 6887 locations->server = server; 6888 locations->nlocations = 0; 6889 6890 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6891 nfs4_set_sequence_privileged(&args.seq_args); 6892 status = nfs4_call_sync_sequence(clnt, server, &msg, 6893 &args.seq_args, &res.seq_res); 6894 if (status == NFS4_OK && 6895 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 6896 status = -NFS4ERR_LEASE_MOVED; 6897 return status; 6898 } 6899 6900 #endif /* CONFIG_NFS_V4_1 */ 6901 6902 /** 6903 * nfs4_proc_get_locations - discover locations for a migrated FSID 6904 * @inode: inode on FSID that is migrating 6905 * @locations: result of query 6906 * @page: buffer 6907 * @cred: credential to use for this operation 6908 * 6909 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 6910 * operation failed, or a negative errno if a local error occurred. 6911 * 6912 * On success, "locations" is filled in, but if the server has 6913 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 6914 * asserted. 6915 * 6916 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 6917 * from this client that require migration recovery. 6918 */ 6919 int nfs4_proc_get_locations(struct inode *inode, 6920 struct nfs4_fs_locations *locations, 6921 struct page *page, struct rpc_cred *cred) 6922 { 6923 struct nfs_server *server = NFS_SERVER(inode); 6924 struct nfs_client *clp = server->nfs_client; 6925 const struct nfs4_mig_recovery_ops *ops = 6926 clp->cl_mvops->mig_recovery_ops; 6927 struct nfs4_exception exception = { }; 6928 int status; 6929 6930 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 6931 (unsigned long long)server->fsid.major, 6932 (unsigned long long)server->fsid.minor, 6933 clp->cl_hostname); 6934 nfs_display_fhandle(NFS_FH(inode), __func__); 6935 6936 do { 6937 status = ops->get_locations(inode, locations, page, cred); 6938 if (status != -NFS4ERR_DELAY) 6939 break; 6940 nfs4_handle_exception(server, status, &exception); 6941 } while (exception.retry); 6942 return status; 6943 } 6944 6945 /* 6946 * This operation also signals the server that this client is 6947 * performing "lease moved" recovery. The server can stop 6948 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 6949 * is appended to this compound to identify the client ID which is 6950 * performing recovery. 6951 */ 6952 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6953 { 6954 struct nfs_server *server = NFS_SERVER(inode); 6955 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 6956 struct rpc_clnt *clnt = server->client; 6957 struct nfs4_fsid_present_arg args = { 6958 .fh = NFS_FH(inode), 6959 .clientid = clp->cl_clientid, 6960 .renew = 1, /* append RENEW */ 6961 }; 6962 struct nfs4_fsid_present_res res = { 6963 .renew = 1, 6964 }; 6965 struct rpc_message msg = { 6966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 6967 .rpc_argp = &args, 6968 .rpc_resp = &res, 6969 .rpc_cred = cred, 6970 }; 6971 unsigned long now = jiffies; 6972 int status; 6973 6974 res.fh = nfs_alloc_fhandle(); 6975 if (res.fh == NULL) 6976 return -ENOMEM; 6977 6978 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6979 nfs4_set_sequence_privileged(&args.seq_args); 6980 status = nfs4_call_sync_sequence(clnt, server, &msg, 6981 &args.seq_args, &res.seq_res); 6982 nfs_free_fhandle(res.fh); 6983 if (status) 6984 return status; 6985 6986 do_renew_lease(clp, now); 6987 return 0; 6988 } 6989 6990 #ifdef CONFIG_NFS_V4_1 6991 6992 /* 6993 * This operation also signals the server that this client is 6994 * performing "lease moved" recovery. The server can stop asserting 6995 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 6996 * this operation is identified in the SEQUENCE operation in this 6997 * compound. 6998 */ 6999 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 7000 { 7001 struct nfs_server *server = NFS_SERVER(inode); 7002 struct rpc_clnt *clnt = server->client; 7003 struct nfs4_fsid_present_arg args = { 7004 .fh = NFS_FH(inode), 7005 }; 7006 struct nfs4_fsid_present_res res = { 7007 }; 7008 struct rpc_message msg = { 7009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 7010 .rpc_argp = &args, 7011 .rpc_resp = &res, 7012 .rpc_cred = cred, 7013 }; 7014 int status; 7015 7016 res.fh = nfs_alloc_fhandle(); 7017 if (res.fh == NULL) 7018 return -ENOMEM; 7019 7020 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 7021 nfs4_set_sequence_privileged(&args.seq_args); 7022 status = nfs4_call_sync_sequence(clnt, server, &msg, 7023 &args.seq_args, &res.seq_res); 7024 nfs_free_fhandle(res.fh); 7025 if (status == NFS4_OK && 7026 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 7027 status = -NFS4ERR_LEASE_MOVED; 7028 return status; 7029 } 7030 7031 #endif /* CONFIG_NFS_V4_1 */ 7032 7033 /** 7034 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 7035 * @inode: inode on FSID to check 7036 * @cred: credential to use for this operation 7037 * 7038 * Server indicates whether the FSID is present, moved, or not 7039 * recognized. This operation is necessary to clear a LEASE_MOVED 7040 * condition for this client ID. 7041 * 7042 * Returns NFS4_OK if the FSID is present on this server, 7043 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 7044 * NFS4ERR code if some error occurred on the server, or a 7045 * negative errno if a local failure occurred. 7046 */ 7047 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 7048 { 7049 struct nfs_server *server = NFS_SERVER(inode); 7050 struct nfs_client *clp = server->nfs_client; 7051 const struct nfs4_mig_recovery_ops *ops = 7052 clp->cl_mvops->mig_recovery_ops; 7053 struct nfs4_exception exception = { }; 7054 int status; 7055 7056 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7057 (unsigned long long)server->fsid.major, 7058 (unsigned long long)server->fsid.minor, 7059 clp->cl_hostname); 7060 nfs_display_fhandle(NFS_FH(inode), __func__); 7061 7062 do { 7063 status = ops->fsid_present(inode, cred); 7064 if (status != -NFS4ERR_DELAY) 7065 break; 7066 nfs4_handle_exception(server, status, &exception); 7067 } while (exception.retry); 7068 return status; 7069 } 7070 7071 /** 7072 * If 'use_integrity' is true and the state managment nfs_client 7073 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 7074 * and the machine credential as per RFC3530bis and RFC5661 Security 7075 * Considerations sections. Otherwise, just use the user cred with the 7076 * filesystem's rpc_client. 7077 */ 7078 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 7079 { 7080 int status; 7081 struct nfs4_secinfo_arg args = { 7082 .dir_fh = NFS_FH(dir), 7083 .name = name, 7084 }; 7085 struct nfs4_secinfo_res res = { 7086 .flavors = flavors, 7087 }; 7088 struct rpc_message msg = { 7089 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 7090 .rpc_argp = &args, 7091 .rpc_resp = &res, 7092 }; 7093 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 7094 struct rpc_cred *cred = NULL; 7095 7096 if (use_integrity) { 7097 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient; 7098 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client); 7099 msg.rpc_cred = cred; 7100 } 7101 7102 dprintk("NFS call secinfo %s\n", name->name); 7103 7104 nfs4_state_protect(NFS_SERVER(dir)->nfs_client, 7105 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 7106 7107 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, 7108 &res.seq_res, 0); 7109 dprintk("NFS reply secinfo: %d\n", status); 7110 7111 if (cred) 7112 put_rpccred(cred); 7113 7114 return status; 7115 } 7116 7117 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 7118 struct nfs4_secinfo_flavors *flavors) 7119 { 7120 struct nfs4_exception exception = { }; 7121 int err; 7122 do { 7123 err = -NFS4ERR_WRONGSEC; 7124 7125 /* try to use integrity protection with machine cred */ 7126 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 7127 err = _nfs4_proc_secinfo(dir, name, flavors, true); 7128 7129 /* 7130 * if unable to use integrity protection, or SECINFO with 7131 * integrity protection returns NFS4ERR_WRONGSEC (which is 7132 * disallowed by spec, but exists in deployed servers) use 7133 * the current filesystem's rpc_client and the user cred. 7134 */ 7135 if (err == -NFS4ERR_WRONGSEC) 7136 err = _nfs4_proc_secinfo(dir, name, flavors, false); 7137 7138 trace_nfs4_secinfo(dir, name, err); 7139 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7140 &exception); 7141 } while (exception.retry); 7142 return err; 7143 } 7144 7145 #ifdef CONFIG_NFS_V4_1 7146 /* 7147 * Check the exchange flags returned by the server for invalid flags, having 7148 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 7149 * DS flags set. 7150 */ 7151 static int nfs4_check_cl_exchange_flags(u32 flags) 7152 { 7153 if (flags & ~EXCHGID4_FLAG_MASK_R) 7154 goto out_inval; 7155 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 7156 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 7157 goto out_inval; 7158 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 7159 goto out_inval; 7160 return NFS_OK; 7161 out_inval: 7162 return -NFS4ERR_INVAL; 7163 } 7164 7165 static bool 7166 nfs41_same_server_scope(struct nfs41_server_scope *a, 7167 struct nfs41_server_scope *b) 7168 { 7169 if (a->server_scope_sz != b->server_scope_sz) 7170 return false; 7171 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0; 7172 } 7173 7174 static void 7175 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 7176 { 7177 } 7178 7179 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 7180 .rpc_call_done = &nfs4_bind_one_conn_to_session_done, 7181 }; 7182 7183 /* 7184 * nfs4_proc_bind_one_conn_to_session() 7185 * 7186 * The 4.1 client currently uses the same TCP connection for the 7187 * fore and backchannel. 7188 */ 7189 static 7190 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 7191 struct rpc_xprt *xprt, 7192 struct nfs_client *clp, 7193 struct rpc_cred *cred) 7194 { 7195 int status; 7196 struct nfs41_bind_conn_to_session_args args = { 7197 .client = clp, 7198 .dir = NFS4_CDFC4_FORE_OR_BOTH, 7199 }; 7200 struct nfs41_bind_conn_to_session_res res; 7201 struct rpc_message msg = { 7202 .rpc_proc = 7203 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 7204 .rpc_argp = &args, 7205 .rpc_resp = &res, 7206 .rpc_cred = cred, 7207 }; 7208 struct rpc_task_setup task_setup_data = { 7209 .rpc_client = clnt, 7210 .rpc_xprt = xprt, 7211 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 7212 .rpc_message = &msg, 7213 .flags = RPC_TASK_TIMEOUT, 7214 }; 7215 struct rpc_task *task; 7216 7217 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 7218 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 7219 args.dir = NFS4_CDFC4_FORE; 7220 7221 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 7222 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 7223 args.dir = NFS4_CDFC4_FORE; 7224 7225 task = rpc_run_task(&task_setup_data); 7226 if (!IS_ERR(task)) { 7227 status = task->tk_status; 7228 rpc_put_task(task); 7229 } else 7230 status = PTR_ERR(task); 7231 trace_nfs4_bind_conn_to_session(clp, status); 7232 if (status == 0) { 7233 if (memcmp(res.sessionid.data, 7234 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 7235 dprintk("NFS: %s: Session ID mismatch\n", __func__); 7236 return -EIO; 7237 } 7238 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 7239 dprintk("NFS: %s: Unexpected direction from server\n", 7240 __func__); 7241 return -EIO; 7242 } 7243 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 7244 dprintk("NFS: %s: Server returned RDMA mode = true\n", 7245 __func__); 7246 return -EIO; 7247 } 7248 } 7249 7250 return status; 7251 } 7252 7253 struct rpc_bind_conn_calldata { 7254 struct nfs_client *clp; 7255 struct rpc_cred *cred; 7256 }; 7257 7258 static int 7259 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 7260 struct rpc_xprt *xprt, 7261 void *calldata) 7262 { 7263 struct rpc_bind_conn_calldata *p = calldata; 7264 7265 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 7266 } 7267 7268 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred) 7269 { 7270 struct rpc_bind_conn_calldata data = { 7271 .clp = clp, 7272 .cred = cred, 7273 }; 7274 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 7275 nfs4_proc_bind_conn_to_session_callback, &data); 7276 } 7277 7278 /* 7279 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 7280 * and operations we'd like to see to enable certain features in the allow map 7281 */ 7282 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 7283 .how = SP4_MACH_CRED, 7284 .enforce.u.words = { 7285 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 7286 1 << (OP_EXCHANGE_ID - 32) | 7287 1 << (OP_CREATE_SESSION - 32) | 7288 1 << (OP_DESTROY_SESSION - 32) | 7289 1 << (OP_DESTROY_CLIENTID - 32) 7290 }, 7291 .allow.u.words = { 7292 [0] = 1 << (OP_CLOSE) | 7293 1 << (OP_OPEN_DOWNGRADE) | 7294 1 << (OP_LOCKU) | 7295 1 << (OP_DELEGRETURN) | 7296 1 << (OP_COMMIT), 7297 [1] = 1 << (OP_SECINFO - 32) | 7298 1 << (OP_SECINFO_NO_NAME - 32) | 7299 1 << (OP_LAYOUTRETURN - 32) | 7300 1 << (OP_TEST_STATEID - 32) | 7301 1 << (OP_FREE_STATEID - 32) | 7302 1 << (OP_WRITE - 32) 7303 } 7304 }; 7305 7306 /* 7307 * Select the state protection mode for client `clp' given the server results 7308 * from exchange_id in `sp'. 7309 * 7310 * Returns 0 on success, negative errno otherwise. 7311 */ 7312 static int nfs4_sp4_select_mode(struct nfs_client *clp, 7313 struct nfs41_state_protection *sp) 7314 { 7315 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 7316 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 7317 1 << (OP_EXCHANGE_ID - 32) | 7318 1 << (OP_CREATE_SESSION - 32) | 7319 1 << (OP_DESTROY_SESSION - 32) | 7320 1 << (OP_DESTROY_CLIENTID - 32) 7321 }; 7322 unsigned int i; 7323 7324 if (sp->how == SP4_MACH_CRED) { 7325 /* Print state protect result */ 7326 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 7327 for (i = 0; i <= LAST_NFS4_OP; i++) { 7328 if (test_bit(i, sp->enforce.u.longs)) 7329 dfprintk(MOUNT, " enforce op %d\n", i); 7330 if (test_bit(i, sp->allow.u.longs)) 7331 dfprintk(MOUNT, " allow op %d\n", i); 7332 } 7333 7334 /* make sure nothing is on enforce list that isn't supported */ 7335 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 7336 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 7337 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 7338 return -EINVAL; 7339 } 7340 } 7341 7342 /* 7343 * Minimal mode - state operations are allowed to use machine 7344 * credential. Note this already happens by default, so the 7345 * client doesn't have to do anything more than the negotiation. 7346 * 7347 * NOTE: we don't care if EXCHANGE_ID is in the list - 7348 * we're already using the machine cred for exchange_id 7349 * and will never use a different cred. 7350 */ 7351 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 7352 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 7353 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 7354 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 7355 dfprintk(MOUNT, "sp4_mach_cred:\n"); 7356 dfprintk(MOUNT, " minimal mode enabled\n"); 7357 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags); 7358 } else { 7359 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 7360 return -EINVAL; 7361 } 7362 7363 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 7364 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 7365 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 7366 test_bit(OP_LOCKU, sp->allow.u.longs)) { 7367 dfprintk(MOUNT, " cleanup mode enabled\n"); 7368 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags); 7369 } 7370 7371 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 7372 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 7373 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, 7374 &clp->cl_sp4_flags); 7375 } 7376 7377 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 7378 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 7379 dfprintk(MOUNT, " secinfo mode enabled\n"); 7380 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags); 7381 } 7382 7383 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 7384 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 7385 dfprintk(MOUNT, " stateid mode enabled\n"); 7386 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags); 7387 } 7388 7389 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 7390 dfprintk(MOUNT, " write mode enabled\n"); 7391 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags); 7392 } 7393 7394 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 7395 dfprintk(MOUNT, " commit mode enabled\n"); 7396 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags); 7397 } 7398 } 7399 7400 return 0; 7401 } 7402 7403 struct nfs41_exchange_id_data { 7404 struct nfs41_exchange_id_res res; 7405 struct nfs41_exchange_id_args args; 7406 struct rpc_xprt *xprt; 7407 int rpc_status; 7408 }; 7409 7410 static void nfs4_exchange_id_done(struct rpc_task *task, void *data) 7411 { 7412 struct nfs41_exchange_id_data *cdata = 7413 (struct nfs41_exchange_id_data *)data; 7414 struct nfs_client *clp = cdata->args.client; 7415 int status = task->tk_status; 7416 7417 trace_nfs4_exchange_id(clp, status); 7418 7419 if (status == 0) 7420 status = nfs4_check_cl_exchange_flags(cdata->res.flags); 7421 7422 if (cdata->xprt && status == 0) { 7423 status = nfs4_detect_session_trunking(clp, &cdata->res, 7424 cdata->xprt); 7425 goto out; 7426 } 7427 7428 if (status == 0) 7429 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect); 7430 7431 if (status == 0) { 7432 clp->cl_clientid = cdata->res.clientid; 7433 clp->cl_exchange_flags = cdata->res.flags; 7434 clp->cl_seqid = cdata->res.seqid; 7435 /* Client ID is not confirmed */ 7436 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) 7437 clear_bit(NFS4_SESSION_ESTABLISHED, 7438 &clp->cl_session->session_state); 7439 7440 kfree(clp->cl_serverowner); 7441 clp->cl_serverowner = cdata->res.server_owner; 7442 cdata->res.server_owner = NULL; 7443 7444 /* use the most recent implementation id */ 7445 kfree(clp->cl_implid); 7446 clp->cl_implid = cdata->res.impl_id; 7447 cdata->res.impl_id = NULL; 7448 7449 if (clp->cl_serverscope != NULL && 7450 !nfs41_same_server_scope(clp->cl_serverscope, 7451 cdata->res.server_scope)) { 7452 dprintk("%s: server_scope mismatch detected\n", 7453 __func__); 7454 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 7455 kfree(clp->cl_serverscope); 7456 clp->cl_serverscope = NULL; 7457 } 7458 7459 if (clp->cl_serverscope == NULL) { 7460 clp->cl_serverscope = cdata->res.server_scope; 7461 cdata->res.server_scope = NULL; 7462 } 7463 /* Save the EXCHANGE_ID verifier session trunk tests */ 7464 memcpy(clp->cl_confirm.data, cdata->args.verifier.data, 7465 sizeof(clp->cl_confirm.data)); 7466 } 7467 out: 7468 cdata->rpc_status = status; 7469 return; 7470 } 7471 7472 static void nfs4_exchange_id_release(void *data) 7473 { 7474 struct nfs41_exchange_id_data *cdata = 7475 (struct nfs41_exchange_id_data *)data; 7476 7477 nfs_put_client(cdata->args.client); 7478 kfree(cdata->res.impl_id); 7479 kfree(cdata->res.server_scope); 7480 kfree(cdata->res.server_owner); 7481 kfree(cdata); 7482 } 7483 7484 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 7485 .rpc_call_done = nfs4_exchange_id_done, 7486 .rpc_release = nfs4_exchange_id_release, 7487 }; 7488 7489 /* 7490 * _nfs4_proc_exchange_id() 7491 * 7492 * Wrapper for EXCHANGE_ID operation. 7493 */ 7494 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred, 7495 u32 sp4_how, struct rpc_xprt *xprt) 7496 { 7497 struct rpc_message msg = { 7498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 7499 .rpc_cred = cred, 7500 }; 7501 struct rpc_task_setup task_setup_data = { 7502 .rpc_client = clp->cl_rpcclient, 7503 .callback_ops = &nfs4_exchange_id_call_ops, 7504 .rpc_message = &msg, 7505 .flags = RPC_TASK_TIMEOUT, 7506 }; 7507 struct nfs41_exchange_id_data *calldata; 7508 struct rpc_task *task; 7509 int status; 7510 7511 if (!atomic_inc_not_zero(&clp->cl_count)) 7512 return -EIO; 7513 7514 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 7515 if (!calldata) { 7516 nfs_put_client(clp); 7517 return -ENOMEM; 7518 } 7519 7520 nfs4_init_boot_verifier(clp, &calldata->args.verifier); 7521 7522 status = nfs4_init_uniform_client_string(clp); 7523 if (status) 7524 goto out_calldata; 7525 7526 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 7527 GFP_NOFS); 7528 status = -ENOMEM; 7529 if (unlikely(calldata->res.server_owner == NULL)) 7530 goto out_calldata; 7531 7532 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 7533 GFP_NOFS); 7534 if (unlikely(calldata->res.server_scope == NULL)) 7535 goto out_server_owner; 7536 7537 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 7538 if (unlikely(calldata->res.impl_id == NULL)) 7539 goto out_server_scope; 7540 7541 switch (sp4_how) { 7542 case SP4_NONE: 7543 calldata->args.state_protect.how = SP4_NONE; 7544 break; 7545 7546 case SP4_MACH_CRED: 7547 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 7548 break; 7549 7550 default: 7551 /* unsupported! */ 7552 WARN_ON_ONCE(1); 7553 status = -EINVAL; 7554 goto out_impl_id; 7555 } 7556 if (xprt) { 7557 calldata->xprt = xprt; 7558 task_setup_data.rpc_xprt = xprt; 7559 task_setup_data.flags |= RPC_TASK_SOFTCONN; 7560 memcpy(calldata->args.verifier.data, clp->cl_confirm.data, 7561 sizeof(calldata->args.verifier.data)); 7562 } 7563 calldata->args.client = clp; 7564 #ifdef CONFIG_NFS_V4_1_MIGRATION 7565 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 7566 EXCHGID4_FLAG_BIND_PRINC_STATEID | 7567 EXCHGID4_FLAG_SUPP_MOVED_MIGR, 7568 #else 7569 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 7570 EXCHGID4_FLAG_BIND_PRINC_STATEID, 7571 #endif 7572 msg.rpc_argp = &calldata->args; 7573 msg.rpc_resp = &calldata->res; 7574 task_setup_data.callback_data = calldata; 7575 7576 task = rpc_run_task(&task_setup_data); 7577 if (IS_ERR(task)) 7578 return PTR_ERR(task); 7579 7580 status = calldata->rpc_status; 7581 7582 rpc_put_task(task); 7583 out: 7584 return status; 7585 7586 out_impl_id: 7587 kfree(calldata->res.impl_id); 7588 out_server_scope: 7589 kfree(calldata->res.server_scope); 7590 out_server_owner: 7591 kfree(calldata->res.server_owner); 7592 out_calldata: 7593 kfree(calldata); 7594 nfs_put_client(clp); 7595 goto out; 7596 } 7597 7598 /* 7599 * nfs4_proc_exchange_id() 7600 * 7601 * Returns zero, a negative errno, or a negative NFS4ERR status code. 7602 * 7603 * Since the clientid has expired, all compounds using sessions 7604 * associated with the stale clientid will be returning 7605 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 7606 * be in some phase of session reset. 7607 * 7608 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 7609 */ 7610 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) 7611 { 7612 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 7613 int status; 7614 7615 /* try SP4_MACH_CRED if krb5i/p */ 7616 if (authflavor == RPC_AUTH_GSS_KRB5I || 7617 authflavor == RPC_AUTH_GSS_KRB5P) { 7618 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL); 7619 if (!status) 7620 return 0; 7621 } 7622 7623 /* try SP4_NONE */ 7624 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL); 7625 } 7626 7627 /** 7628 * nfs4_test_session_trunk 7629 * 7630 * This is an add_xprt_test() test function called from 7631 * rpc_clnt_setup_test_and_add_xprt. 7632 * 7633 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 7634 * and is dereferrenced in nfs4_exchange_id_release 7635 * 7636 * Upon success, add the new transport to the rpc_clnt 7637 * 7638 * @clnt: struct rpc_clnt to get new transport 7639 * @xprt: the rpc_xprt to test 7640 * @data: call data for _nfs4_proc_exchange_id. 7641 */ 7642 int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 7643 void *data) 7644 { 7645 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data; 7646 u32 sp4_how; 7647 7648 dprintk("--> %s try %s\n", __func__, 7649 xprt->address_strings[RPC_DISPLAY_ADDR]); 7650 7651 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 7652 7653 /* Test connection for session trunking. Async exchange_id call */ 7654 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 7655 } 7656 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 7657 7658 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 7659 struct rpc_cred *cred) 7660 { 7661 struct rpc_message msg = { 7662 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 7663 .rpc_argp = clp, 7664 .rpc_cred = cred, 7665 }; 7666 int status; 7667 7668 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 7669 trace_nfs4_destroy_clientid(clp, status); 7670 if (status) 7671 dprintk("NFS: Got error %d from the server %s on " 7672 "DESTROY_CLIENTID.", status, clp->cl_hostname); 7673 return status; 7674 } 7675 7676 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 7677 struct rpc_cred *cred) 7678 { 7679 unsigned int loop; 7680 int ret; 7681 7682 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 7683 ret = _nfs4_proc_destroy_clientid(clp, cred); 7684 switch (ret) { 7685 case -NFS4ERR_DELAY: 7686 case -NFS4ERR_CLIENTID_BUSY: 7687 ssleep(1); 7688 break; 7689 default: 7690 return ret; 7691 } 7692 } 7693 return 0; 7694 } 7695 7696 int nfs4_destroy_clientid(struct nfs_client *clp) 7697 { 7698 struct rpc_cred *cred; 7699 int ret = 0; 7700 7701 if (clp->cl_mvops->minor_version < 1) 7702 goto out; 7703 if (clp->cl_exchange_flags == 0) 7704 goto out; 7705 if (clp->cl_preserve_clid) 7706 goto out; 7707 cred = nfs4_get_clid_cred(clp); 7708 ret = nfs4_proc_destroy_clientid(clp, cred); 7709 if (cred) 7710 put_rpccred(cred); 7711 switch (ret) { 7712 case 0: 7713 case -NFS4ERR_STALE_CLIENTID: 7714 clp->cl_exchange_flags = 0; 7715 } 7716 out: 7717 return ret; 7718 } 7719 7720 struct nfs4_get_lease_time_data { 7721 struct nfs4_get_lease_time_args *args; 7722 struct nfs4_get_lease_time_res *res; 7723 struct nfs_client *clp; 7724 }; 7725 7726 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 7727 void *calldata) 7728 { 7729 struct nfs4_get_lease_time_data *data = 7730 (struct nfs4_get_lease_time_data *)calldata; 7731 7732 dprintk("--> %s\n", __func__); 7733 /* just setup sequence, do not trigger session recovery 7734 since we're invoked within one */ 7735 nfs4_setup_sequence(data->clp, 7736 &data->args->la_seq_args, 7737 &data->res->lr_seq_res, 7738 task); 7739 dprintk("<-- %s\n", __func__); 7740 } 7741 7742 /* 7743 * Called from nfs4_state_manager thread for session setup, so don't recover 7744 * from sequence operation or clientid errors. 7745 */ 7746 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 7747 { 7748 struct nfs4_get_lease_time_data *data = 7749 (struct nfs4_get_lease_time_data *)calldata; 7750 7751 dprintk("--> %s\n", __func__); 7752 if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) 7753 return; 7754 switch (task->tk_status) { 7755 case -NFS4ERR_DELAY: 7756 case -NFS4ERR_GRACE: 7757 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 7758 rpc_delay(task, NFS4_POLL_RETRY_MIN); 7759 task->tk_status = 0; 7760 /* fall through */ 7761 case -NFS4ERR_RETRY_UNCACHED_REP: 7762 rpc_restart_call_prepare(task); 7763 return; 7764 } 7765 dprintk("<-- %s\n", __func__); 7766 } 7767 7768 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 7769 .rpc_call_prepare = nfs4_get_lease_time_prepare, 7770 .rpc_call_done = nfs4_get_lease_time_done, 7771 }; 7772 7773 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 7774 { 7775 struct rpc_task *task; 7776 struct nfs4_get_lease_time_args args; 7777 struct nfs4_get_lease_time_res res = { 7778 .lr_fsinfo = fsinfo, 7779 }; 7780 struct nfs4_get_lease_time_data data = { 7781 .args = &args, 7782 .res = &res, 7783 .clp = clp, 7784 }; 7785 struct rpc_message msg = { 7786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 7787 .rpc_argp = &args, 7788 .rpc_resp = &res, 7789 }; 7790 struct rpc_task_setup task_setup = { 7791 .rpc_client = clp->cl_rpcclient, 7792 .rpc_message = &msg, 7793 .callback_ops = &nfs4_get_lease_time_ops, 7794 .callback_data = &data, 7795 .flags = RPC_TASK_TIMEOUT, 7796 }; 7797 int status; 7798 7799 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0); 7800 nfs4_set_sequence_privileged(&args.la_seq_args); 7801 task = rpc_run_task(&task_setup); 7802 7803 if (IS_ERR(task)) 7804 return PTR_ERR(task); 7805 7806 status = task->tk_status; 7807 rpc_put_task(task); 7808 return status; 7809 } 7810 7811 /* 7812 * Initialize the values to be used by the client in CREATE_SESSION 7813 * If nfs4_init_session set the fore channel request and response sizes, 7814 * use them. 7815 * 7816 * Set the back channel max_resp_sz_cached to zero to force the client to 7817 * always set csa_cachethis to FALSE because the current implementation 7818 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 7819 */ 7820 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 7821 struct rpc_clnt *clnt) 7822 { 7823 unsigned int max_rqst_sz, max_resp_sz; 7824 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 7825 7826 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 7827 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 7828 7829 /* Fore channel attributes */ 7830 args->fc_attrs.max_rqst_sz = max_rqst_sz; 7831 args->fc_attrs.max_resp_sz = max_resp_sz; 7832 args->fc_attrs.max_ops = NFS4_MAX_OPS; 7833 args->fc_attrs.max_reqs = max_session_slots; 7834 7835 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 7836 "max_ops=%u max_reqs=%u\n", 7837 __func__, 7838 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 7839 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 7840 7841 /* Back channel attributes */ 7842 args->bc_attrs.max_rqst_sz = max_bc_payload; 7843 args->bc_attrs.max_resp_sz = max_bc_payload; 7844 args->bc_attrs.max_resp_sz_cached = 0; 7845 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 7846 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1); 7847 7848 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 7849 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 7850 __func__, 7851 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 7852 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 7853 args->bc_attrs.max_reqs); 7854 } 7855 7856 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 7857 struct nfs41_create_session_res *res) 7858 { 7859 struct nfs4_channel_attrs *sent = &args->fc_attrs; 7860 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 7861 7862 if (rcvd->max_resp_sz > sent->max_resp_sz) 7863 return -EINVAL; 7864 /* 7865 * Our requested max_ops is the minimum we need; we're not 7866 * prepared to break up compounds into smaller pieces than that. 7867 * So, no point even trying to continue if the server won't 7868 * cooperate: 7869 */ 7870 if (rcvd->max_ops < sent->max_ops) 7871 return -EINVAL; 7872 if (rcvd->max_reqs == 0) 7873 return -EINVAL; 7874 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 7875 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 7876 return 0; 7877 } 7878 7879 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 7880 struct nfs41_create_session_res *res) 7881 { 7882 struct nfs4_channel_attrs *sent = &args->bc_attrs; 7883 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 7884 7885 if (!(res->flags & SESSION4_BACK_CHAN)) 7886 goto out; 7887 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 7888 return -EINVAL; 7889 if (rcvd->max_resp_sz < sent->max_resp_sz) 7890 return -EINVAL; 7891 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 7892 return -EINVAL; 7893 if (rcvd->max_ops > sent->max_ops) 7894 return -EINVAL; 7895 if (rcvd->max_reqs > sent->max_reqs) 7896 return -EINVAL; 7897 out: 7898 return 0; 7899 } 7900 7901 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 7902 struct nfs41_create_session_res *res) 7903 { 7904 int ret; 7905 7906 ret = nfs4_verify_fore_channel_attrs(args, res); 7907 if (ret) 7908 return ret; 7909 return nfs4_verify_back_channel_attrs(args, res); 7910 } 7911 7912 static void nfs4_update_session(struct nfs4_session *session, 7913 struct nfs41_create_session_res *res) 7914 { 7915 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 7916 /* Mark client id and session as being confirmed */ 7917 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 7918 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 7919 session->flags = res->flags; 7920 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 7921 if (res->flags & SESSION4_BACK_CHAN) 7922 memcpy(&session->bc_attrs, &res->bc_attrs, 7923 sizeof(session->bc_attrs)); 7924 } 7925 7926 static int _nfs4_proc_create_session(struct nfs_client *clp, 7927 struct rpc_cred *cred) 7928 { 7929 struct nfs4_session *session = clp->cl_session; 7930 struct nfs41_create_session_args args = { 7931 .client = clp, 7932 .clientid = clp->cl_clientid, 7933 .seqid = clp->cl_seqid, 7934 .cb_program = NFS4_CALLBACK, 7935 }; 7936 struct nfs41_create_session_res res; 7937 7938 struct rpc_message msg = { 7939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 7940 .rpc_argp = &args, 7941 .rpc_resp = &res, 7942 .rpc_cred = cred, 7943 }; 7944 int status; 7945 7946 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 7947 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 7948 7949 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 7950 trace_nfs4_create_session(clp, status); 7951 7952 switch (status) { 7953 case -NFS4ERR_STALE_CLIENTID: 7954 case -NFS4ERR_DELAY: 7955 case -ETIMEDOUT: 7956 case -EACCES: 7957 case -EAGAIN: 7958 goto out; 7959 }; 7960 7961 clp->cl_seqid++; 7962 if (!status) { 7963 /* Verify the session's negotiated channel_attrs values */ 7964 status = nfs4_verify_channel_attrs(&args, &res); 7965 /* Increment the clientid slot sequence id */ 7966 if (status) 7967 goto out; 7968 nfs4_update_session(session, &res); 7969 } 7970 out: 7971 return status; 7972 } 7973 7974 /* 7975 * Issues a CREATE_SESSION operation to the server. 7976 * It is the responsibility of the caller to verify the session is 7977 * expired before calling this routine. 7978 */ 7979 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred) 7980 { 7981 int status; 7982 unsigned *ptr; 7983 struct nfs4_session *session = clp->cl_session; 7984 7985 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 7986 7987 status = _nfs4_proc_create_session(clp, cred); 7988 if (status) 7989 goto out; 7990 7991 /* Init or reset the session slot tables */ 7992 status = nfs4_setup_session_slot_tables(session); 7993 dprintk("slot table setup returned %d\n", status); 7994 if (status) 7995 goto out; 7996 7997 ptr = (unsigned *)&session->sess_id.data[0]; 7998 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 7999 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 8000 out: 8001 dprintk("<-- %s\n", __func__); 8002 return status; 8003 } 8004 8005 /* 8006 * Issue the over-the-wire RPC DESTROY_SESSION. 8007 * The caller must serialize access to this routine. 8008 */ 8009 int nfs4_proc_destroy_session(struct nfs4_session *session, 8010 struct rpc_cred *cred) 8011 { 8012 struct rpc_message msg = { 8013 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 8014 .rpc_argp = session, 8015 .rpc_cred = cred, 8016 }; 8017 int status = 0; 8018 8019 dprintk("--> nfs4_proc_destroy_session\n"); 8020 8021 /* session is still being setup */ 8022 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 8023 return 0; 8024 8025 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 8026 trace_nfs4_destroy_session(session->clp, status); 8027 8028 if (status) 8029 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 8030 "Session has been destroyed regardless...\n", status); 8031 8032 dprintk("<-- nfs4_proc_destroy_session\n"); 8033 return status; 8034 } 8035 8036 /* 8037 * Renew the cl_session lease. 8038 */ 8039 struct nfs4_sequence_data { 8040 struct nfs_client *clp; 8041 struct nfs4_sequence_args args; 8042 struct nfs4_sequence_res res; 8043 }; 8044 8045 static void nfs41_sequence_release(void *data) 8046 { 8047 struct nfs4_sequence_data *calldata = data; 8048 struct nfs_client *clp = calldata->clp; 8049 8050 if (atomic_read(&clp->cl_count) > 1) 8051 nfs4_schedule_state_renewal(clp); 8052 nfs_put_client(clp); 8053 kfree(calldata); 8054 } 8055 8056 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 8057 { 8058 switch(task->tk_status) { 8059 case -NFS4ERR_DELAY: 8060 rpc_delay(task, NFS4_POLL_RETRY_MAX); 8061 return -EAGAIN; 8062 default: 8063 nfs4_schedule_lease_recovery(clp); 8064 } 8065 return 0; 8066 } 8067 8068 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 8069 { 8070 struct nfs4_sequence_data *calldata = data; 8071 struct nfs_client *clp = calldata->clp; 8072 8073 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 8074 return; 8075 8076 trace_nfs4_sequence(clp, task->tk_status); 8077 if (task->tk_status < 0) { 8078 dprintk("%s ERROR %d\n", __func__, task->tk_status); 8079 if (atomic_read(&clp->cl_count) == 1) 8080 goto out; 8081 8082 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 8083 rpc_restart_call_prepare(task); 8084 return; 8085 } 8086 } 8087 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 8088 out: 8089 dprintk("<-- %s\n", __func__); 8090 } 8091 8092 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 8093 { 8094 struct nfs4_sequence_data *calldata = data; 8095 struct nfs_client *clp = calldata->clp; 8096 struct nfs4_sequence_args *args; 8097 struct nfs4_sequence_res *res; 8098 8099 args = task->tk_msg.rpc_argp; 8100 res = task->tk_msg.rpc_resp; 8101 8102 nfs4_setup_sequence(clp, args, res, task); 8103 } 8104 8105 static const struct rpc_call_ops nfs41_sequence_ops = { 8106 .rpc_call_done = nfs41_sequence_call_done, 8107 .rpc_call_prepare = nfs41_sequence_prepare, 8108 .rpc_release = nfs41_sequence_release, 8109 }; 8110 8111 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 8112 struct rpc_cred *cred, 8113 bool is_privileged) 8114 { 8115 struct nfs4_sequence_data *calldata; 8116 struct rpc_message msg = { 8117 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 8118 .rpc_cred = cred, 8119 }; 8120 struct rpc_task_setup task_setup_data = { 8121 .rpc_client = clp->cl_rpcclient, 8122 .rpc_message = &msg, 8123 .callback_ops = &nfs41_sequence_ops, 8124 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 8125 }; 8126 8127 if (!atomic_inc_not_zero(&clp->cl_count)) 8128 return ERR_PTR(-EIO); 8129 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8130 if (calldata == NULL) { 8131 nfs_put_client(clp); 8132 return ERR_PTR(-ENOMEM); 8133 } 8134 nfs4_init_sequence(&calldata->args, &calldata->res, 0); 8135 if (is_privileged) 8136 nfs4_set_sequence_privileged(&calldata->args); 8137 msg.rpc_argp = &calldata->args; 8138 msg.rpc_resp = &calldata->res; 8139 calldata->clp = clp; 8140 task_setup_data.callback_data = calldata; 8141 8142 return rpc_run_task(&task_setup_data); 8143 } 8144 8145 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) 8146 { 8147 struct rpc_task *task; 8148 int ret = 0; 8149 8150 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 8151 return -EAGAIN; 8152 task = _nfs41_proc_sequence(clp, cred, false); 8153 if (IS_ERR(task)) 8154 ret = PTR_ERR(task); 8155 else 8156 rpc_put_task_async(task); 8157 dprintk("<-- %s status=%d\n", __func__, ret); 8158 return ret; 8159 } 8160 8161 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) 8162 { 8163 struct rpc_task *task; 8164 int ret; 8165 8166 task = _nfs41_proc_sequence(clp, cred, true); 8167 if (IS_ERR(task)) { 8168 ret = PTR_ERR(task); 8169 goto out; 8170 } 8171 ret = rpc_wait_for_completion_task(task); 8172 if (!ret) 8173 ret = task->tk_status; 8174 rpc_put_task(task); 8175 out: 8176 dprintk("<-- %s status=%d\n", __func__, ret); 8177 return ret; 8178 } 8179 8180 struct nfs4_reclaim_complete_data { 8181 struct nfs_client *clp; 8182 struct nfs41_reclaim_complete_args arg; 8183 struct nfs41_reclaim_complete_res res; 8184 }; 8185 8186 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 8187 { 8188 struct nfs4_reclaim_complete_data *calldata = data; 8189 8190 nfs4_setup_sequence(calldata->clp, 8191 &calldata->arg.seq_args, 8192 &calldata->res.seq_res, 8193 task); 8194 } 8195 8196 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 8197 { 8198 switch(task->tk_status) { 8199 case 0: 8200 case -NFS4ERR_COMPLETE_ALREADY: 8201 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 8202 break; 8203 case -NFS4ERR_DELAY: 8204 rpc_delay(task, NFS4_POLL_RETRY_MAX); 8205 /* fall through */ 8206 case -NFS4ERR_RETRY_UNCACHED_REP: 8207 return -EAGAIN; 8208 case -NFS4ERR_BADSESSION: 8209 case -NFS4ERR_DEADSESSION: 8210 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 8211 nfs4_schedule_session_recovery(clp->cl_session, 8212 task->tk_status); 8213 break; 8214 default: 8215 nfs4_schedule_lease_recovery(clp); 8216 } 8217 return 0; 8218 } 8219 8220 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 8221 { 8222 struct nfs4_reclaim_complete_data *calldata = data; 8223 struct nfs_client *clp = calldata->clp; 8224 struct nfs4_sequence_res *res = &calldata->res.seq_res; 8225 8226 dprintk("--> %s\n", __func__); 8227 if (!nfs41_sequence_done(task, res)) 8228 return; 8229 8230 trace_nfs4_reclaim_complete(clp, task->tk_status); 8231 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 8232 rpc_restart_call_prepare(task); 8233 return; 8234 } 8235 dprintk("<-- %s\n", __func__); 8236 } 8237 8238 static void nfs4_free_reclaim_complete_data(void *data) 8239 { 8240 struct nfs4_reclaim_complete_data *calldata = data; 8241 8242 kfree(calldata); 8243 } 8244 8245 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 8246 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 8247 .rpc_call_done = nfs4_reclaim_complete_done, 8248 .rpc_release = nfs4_free_reclaim_complete_data, 8249 }; 8250 8251 /* 8252 * Issue a global reclaim complete. 8253 */ 8254 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 8255 struct rpc_cred *cred) 8256 { 8257 struct nfs4_reclaim_complete_data *calldata; 8258 struct rpc_task *task; 8259 struct rpc_message msg = { 8260 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 8261 .rpc_cred = cred, 8262 }; 8263 struct rpc_task_setup task_setup_data = { 8264 .rpc_client = clp->cl_rpcclient, 8265 .rpc_message = &msg, 8266 .callback_ops = &nfs4_reclaim_complete_call_ops, 8267 .flags = RPC_TASK_ASYNC, 8268 }; 8269 int status = -ENOMEM; 8270 8271 dprintk("--> %s\n", __func__); 8272 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8273 if (calldata == NULL) 8274 goto out; 8275 calldata->clp = clp; 8276 calldata->arg.one_fs = 0; 8277 8278 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0); 8279 nfs4_set_sequence_privileged(&calldata->arg.seq_args); 8280 msg.rpc_argp = &calldata->arg; 8281 msg.rpc_resp = &calldata->res; 8282 task_setup_data.callback_data = calldata; 8283 task = rpc_run_task(&task_setup_data); 8284 if (IS_ERR(task)) { 8285 status = PTR_ERR(task); 8286 goto out; 8287 } 8288 status = rpc_wait_for_completion_task(task); 8289 if (status == 0) 8290 status = task->tk_status; 8291 rpc_put_task(task); 8292 out: 8293 dprintk("<-- %s status=%d\n", __func__, status); 8294 return status; 8295 } 8296 8297 static void 8298 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 8299 { 8300 struct nfs4_layoutget *lgp = calldata; 8301 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 8302 8303 dprintk("--> %s\n", __func__); 8304 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args, 8305 &lgp->res.seq_res, task); 8306 dprintk("<-- %s\n", __func__); 8307 } 8308 8309 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 8310 { 8311 struct nfs4_layoutget *lgp = calldata; 8312 8313 dprintk("--> %s\n", __func__); 8314 nfs41_sequence_process(task, &lgp->res.seq_res); 8315 dprintk("<-- %s\n", __func__); 8316 } 8317 8318 static int 8319 nfs4_layoutget_handle_exception(struct rpc_task *task, 8320 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 8321 { 8322 struct inode *inode = lgp->args.inode; 8323 struct nfs_server *server = NFS_SERVER(inode); 8324 struct pnfs_layout_hdr *lo; 8325 int nfs4err = task->tk_status; 8326 int err, status = 0; 8327 LIST_HEAD(head); 8328 8329 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 8330 8331 switch (nfs4err) { 8332 case 0: 8333 goto out; 8334 8335 /* 8336 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 8337 * on the file. set tk_status to -ENODATA to tell upper layer to 8338 * retry go inband. 8339 */ 8340 case -NFS4ERR_LAYOUTUNAVAILABLE: 8341 status = -ENODATA; 8342 goto out; 8343 /* 8344 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 8345 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 8346 */ 8347 case -NFS4ERR_BADLAYOUT: 8348 status = -EOVERFLOW; 8349 goto out; 8350 /* 8351 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 8352 * (or clients) writing to the same RAID stripe except when 8353 * the minlength argument is 0 (see RFC5661 section 18.43.3). 8354 * 8355 * Treat it like we would RECALLCONFLICT -- we retry for a little 8356 * while, and then eventually give up. 8357 */ 8358 case -NFS4ERR_LAYOUTTRYLATER: 8359 if (lgp->args.minlength == 0) { 8360 status = -EOVERFLOW; 8361 goto out; 8362 } 8363 status = -EBUSY; 8364 break; 8365 case -NFS4ERR_RECALLCONFLICT: 8366 status = -ERECALLCONFLICT; 8367 break; 8368 case -NFS4ERR_DELEG_REVOKED: 8369 case -NFS4ERR_ADMIN_REVOKED: 8370 case -NFS4ERR_EXPIRED: 8371 case -NFS4ERR_BAD_STATEID: 8372 exception->timeout = 0; 8373 spin_lock(&inode->i_lock); 8374 lo = NFS_I(inode)->layout; 8375 /* If the open stateid was bad, then recover it. */ 8376 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 8377 nfs4_stateid_match_other(&lgp->args.stateid, 8378 &lgp->args.ctx->state->stateid)) { 8379 spin_unlock(&inode->i_lock); 8380 exception->state = lgp->args.ctx->state; 8381 exception->stateid = &lgp->args.stateid; 8382 break; 8383 } 8384 8385 /* 8386 * Mark the bad layout state as invalid, then retry 8387 */ 8388 pnfs_mark_layout_stateid_invalid(lo, &head); 8389 spin_unlock(&inode->i_lock); 8390 nfs_commit_inode(inode, 0); 8391 pnfs_free_lseg_list(&head); 8392 status = -EAGAIN; 8393 goto out; 8394 } 8395 8396 nfs4_sequence_free_slot(&lgp->res.seq_res); 8397 err = nfs4_handle_exception(server, nfs4err, exception); 8398 if (!status) { 8399 if (exception->retry) 8400 status = -EAGAIN; 8401 else 8402 status = err; 8403 } 8404 out: 8405 dprintk("<-- %s\n", __func__); 8406 return status; 8407 } 8408 8409 static size_t max_response_pages(struct nfs_server *server) 8410 { 8411 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 8412 return nfs_page_array_len(0, max_resp_sz); 8413 } 8414 8415 static void nfs4_free_pages(struct page **pages, size_t size) 8416 { 8417 int i; 8418 8419 if (!pages) 8420 return; 8421 8422 for (i = 0; i < size; i++) { 8423 if (!pages[i]) 8424 break; 8425 __free_page(pages[i]); 8426 } 8427 kfree(pages); 8428 } 8429 8430 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags) 8431 { 8432 struct page **pages; 8433 int i; 8434 8435 pages = kcalloc(size, sizeof(struct page *), gfp_flags); 8436 if (!pages) { 8437 dprintk("%s: can't alloc array of %zu pages\n", __func__, size); 8438 return NULL; 8439 } 8440 8441 for (i = 0; i < size; i++) { 8442 pages[i] = alloc_page(gfp_flags); 8443 if (!pages[i]) { 8444 dprintk("%s: failed to allocate page\n", __func__); 8445 nfs4_free_pages(pages, size); 8446 return NULL; 8447 } 8448 } 8449 8450 return pages; 8451 } 8452 8453 static void nfs4_layoutget_release(void *calldata) 8454 { 8455 struct nfs4_layoutget *lgp = calldata; 8456 struct inode *inode = lgp->args.inode; 8457 struct nfs_server *server = NFS_SERVER(inode); 8458 size_t max_pages = max_response_pages(server); 8459 8460 dprintk("--> %s\n", __func__); 8461 nfs4_sequence_free_slot(&lgp->res.seq_res); 8462 nfs4_free_pages(lgp->args.layout.pages, max_pages); 8463 pnfs_put_layout_hdr(NFS_I(inode)->layout); 8464 put_nfs_open_context(lgp->args.ctx); 8465 kfree(calldata); 8466 dprintk("<-- %s\n", __func__); 8467 } 8468 8469 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 8470 .rpc_call_prepare = nfs4_layoutget_prepare, 8471 .rpc_call_done = nfs4_layoutget_done, 8472 .rpc_release = nfs4_layoutget_release, 8473 }; 8474 8475 struct pnfs_layout_segment * 8476 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags) 8477 { 8478 struct inode *inode = lgp->args.inode; 8479 struct nfs_server *server = NFS_SERVER(inode); 8480 size_t max_pages = max_response_pages(server); 8481 struct rpc_task *task; 8482 struct rpc_message msg = { 8483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 8484 .rpc_argp = &lgp->args, 8485 .rpc_resp = &lgp->res, 8486 .rpc_cred = lgp->cred, 8487 }; 8488 struct rpc_task_setup task_setup_data = { 8489 .rpc_client = server->client, 8490 .rpc_message = &msg, 8491 .callback_ops = &nfs4_layoutget_call_ops, 8492 .callback_data = lgp, 8493 .flags = RPC_TASK_ASYNC, 8494 }; 8495 struct pnfs_layout_segment *lseg = NULL; 8496 struct nfs4_exception exception = { 8497 .inode = inode, 8498 .timeout = *timeout, 8499 }; 8500 int status = 0; 8501 8502 dprintk("--> %s\n", __func__); 8503 8504 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ 8505 pnfs_get_layout_hdr(NFS_I(inode)->layout); 8506 8507 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags); 8508 if (!lgp->args.layout.pages) { 8509 nfs4_layoutget_release(lgp); 8510 return ERR_PTR(-ENOMEM); 8511 } 8512 lgp->args.layout.pglen = max_pages * PAGE_SIZE; 8513 8514 lgp->res.layoutp = &lgp->args.layout; 8515 lgp->res.seq_res.sr_slot = NULL; 8516 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0); 8517 8518 task = rpc_run_task(&task_setup_data); 8519 if (IS_ERR(task)) 8520 return ERR_CAST(task); 8521 status = rpc_wait_for_completion_task(task); 8522 if (status == 0) { 8523 status = nfs4_layoutget_handle_exception(task, lgp, &exception); 8524 *timeout = exception.timeout; 8525 } 8526 8527 trace_nfs4_layoutget(lgp->args.ctx, 8528 &lgp->args.range, 8529 &lgp->res.range, 8530 &lgp->res.stateid, 8531 status); 8532 8533 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */ 8534 if (status == 0 && lgp->res.layoutp->len) 8535 lseg = pnfs_layout_process(lgp); 8536 rpc_put_task(task); 8537 dprintk("<-- %s status=%d\n", __func__, status); 8538 if (status) 8539 return ERR_PTR(status); 8540 return lseg; 8541 } 8542 8543 static void 8544 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 8545 { 8546 struct nfs4_layoutreturn *lrp = calldata; 8547 8548 dprintk("--> %s\n", __func__); 8549 nfs4_setup_sequence(lrp->clp, 8550 &lrp->args.seq_args, 8551 &lrp->res.seq_res, 8552 task); 8553 } 8554 8555 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 8556 { 8557 struct nfs4_layoutreturn *lrp = calldata; 8558 struct nfs_server *server; 8559 8560 dprintk("--> %s\n", __func__); 8561 8562 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 8563 return; 8564 8565 server = NFS_SERVER(lrp->args.inode); 8566 switch (task->tk_status) { 8567 default: 8568 task->tk_status = 0; 8569 case 0: 8570 break; 8571 case -NFS4ERR_DELAY: 8572 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 8573 break; 8574 nfs4_sequence_free_slot(&lrp->res.seq_res); 8575 rpc_restart_call_prepare(task); 8576 return; 8577 } 8578 dprintk("<-- %s\n", __func__); 8579 } 8580 8581 static void nfs4_layoutreturn_release(void *calldata) 8582 { 8583 struct nfs4_layoutreturn *lrp = calldata; 8584 struct pnfs_layout_hdr *lo = lrp->args.layout; 8585 8586 dprintk("--> %s\n", __func__); 8587 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range, 8588 lrp->res.lrs_present ? &lrp->res.stateid : NULL); 8589 nfs4_sequence_free_slot(&lrp->res.seq_res); 8590 if (lrp->ld_private.ops && lrp->ld_private.ops->free) 8591 lrp->ld_private.ops->free(&lrp->ld_private); 8592 pnfs_put_layout_hdr(lrp->args.layout); 8593 nfs_iput_and_deactive(lrp->inode); 8594 kfree(calldata); 8595 dprintk("<-- %s\n", __func__); 8596 } 8597 8598 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 8599 .rpc_call_prepare = nfs4_layoutreturn_prepare, 8600 .rpc_call_done = nfs4_layoutreturn_done, 8601 .rpc_release = nfs4_layoutreturn_release, 8602 }; 8603 8604 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 8605 { 8606 struct rpc_task *task; 8607 struct rpc_message msg = { 8608 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 8609 .rpc_argp = &lrp->args, 8610 .rpc_resp = &lrp->res, 8611 .rpc_cred = lrp->cred, 8612 }; 8613 struct rpc_task_setup task_setup_data = { 8614 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 8615 .rpc_message = &msg, 8616 .callback_ops = &nfs4_layoutreturn_call_ops, 8617 .callback_data = lrp, 8618 }; 8619 int status = 0; 8620 8621 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 8622 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 8623 &task_setup_data.rpc_client, &msg); 8624 8625 dprintk("--> %s\n", __func__); 8626 if (!sync) { 8627 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 8628 if (!lrp->inode) { 8629 nfs4_layoutreturn_release(lrp); 8630 return -EAGAIN; 8631 } 8632 task_setup_data.flags |= RPC_TASK_ASYNC; 8633 } 8634 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1); 8635 task = rpc_run_task(&task_setup_data); 8636 if (IS_ERR(task)) 8637 return PTR_ERR(task); 8638 if (sync) 8639 status = task->tk_status; 8640 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 8641 dprintk("<-- %s status=%d\n", __func__, status); 8642 rpc_put_task(task); 8643 return status; 8644 } 8645 8646 static int 8647 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 8648 struct pnfs_device *pdev, 8649 struct rpc_cred *cred) 8650 { 8651 struct nfs4_getdeviceinfo_args args = { 8652 .pdev = pdev, 8653 .notify_types = NOTIFY_DEVICEID4_CHANGE | 8654 NOTIFY_DEVICEID4_DELETE, 8655 }; 8656 struct nfs4_getdeviceinfo_res res = { 8657 .pdev = pdev, 8658 }; 8659 struct rpc_message msg = { 8660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 8661 .rpc_argp = &args, 8662 .rpc_resp = &res, 8663 .rpc_cred = cred, 8664 }; 8665 int status; 8666 8667 dprintk("--> %s\n", __func__); 8668 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 8669 if (res.notification & ~args.notify_types) 8670 dprintk("%s: unsupported notification\n", __func__); 8671 if (res.notification != args.notify_types) 8672 pdev->nocache = 1; 8673 8674 dprintk("<-- %s status=%d\n", __func__, status); 8675 8676 return status; 8677 } 8678 8679 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 8680 struct pnfs_device *pdev, 8681 struct rpc_cred *cred) 8682 { 8683 struct nfs4_exception exception = { }; 8684 int err; 8685 8686 do { 8687 err = nfs4_handle_exception(server, 8688 _nfs4_proc_getdeviceinfo(server, pdev, cred), 8689 &exception); 8690 } while (exception.retry); 8691 return err; 8692 } 8693 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 8694 8695 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 8696 { 8697 struct nfs4_layoutcommit_data *data = calldata; 8698 struct nfs_server *server = NFS_SERVER(data->args.inode); 8699 8700 nfs4_setup_sequence(server->nfs_client, 8701 &data->args.seq_args, 8702 &data->res.seq_res, 8703 task); 8704 } 8705 8706 static void 8707 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 8708 { 8709 struct nfs4_layoutcommit_data *data = calldata; 8710 struct nfs_server *server = NFS_SERVER(data->args.inode); 8711 8712 if (!nfs41_sequence_done(task, &data->res.seq_res)) 8713 return; 8714 8715 switch (task->tk_status) { /* Just ignore these failures */ 8716 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 8717 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 8718 case -NFS4ERR_BADLAYOUT: /* no layout */ 8719 case -NFS4ERR_GRACE: /* loca_recalim always false */ 8720 task->tk_status = 0; 8721 case 0: 8722 break; 8723 default: 8724 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 8725 rpc_restart_call_prepare(task); 8726 return; 8727 } 8728 } 8729 } 8730 8731 static void nfs4_layoutcommit_release(void *calldata) 8732 { 8733 struct nfs4_layoutcommit_data *data = calldata; 8734 8735 pnfs_cleanup_layoutcommit(data); 8736 nfs_post_op_update_inode_force_wcc(data->args.inode, 8737 data->res.fattr); 8738 put_rpccred(data->cred); 8739 nfs_iput_and_deactive(data->inode); 8740 kfree(data); 8741 } 8742 8743 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 8744 .rpc_call_prepare = nfs4_layoutcommit_prepare, 8745 .rpc_call_done = nfs4_layoutcommit_done, 8746 .rpc_release = nfs4_layoutcommit_release, 8747 }; 8748 8749 int 8750 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 8751 { 8752 struct rpc_message msg = { 8753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 8754 .rpc_argp = &data->args, 8755 .rpc_resp = &data->res, 8756 .rpc_cred = data->cred, 8757 }; 8758 struct rpc_task_setup task_setup_data = { 8759 .task = &data->task, 8760 .rpc_client = NFS_CLIENT(data->args.inode), 8761 .rpc_message = &msg, 8762 .callback_ops = &nfs4_layoutcommit_ops, 8763 .callback_data = data, 8764 }; 8765 struct rpc_task *task; 8766 int status = 0; 8767 8768 dprintk("NFS: initiating layoutcommit call. sync %d " 8769 "lbw: %llu inode %lu\n", sync, 8770 data->args.lastbytewritten, 8771 data->args.inode->i_ino); 8772 8773 if (!sync) { 8774 data->inode = nfs_igrab_and_active(data->args.inode); 8775 if (data->inode == NULL) { 8776 nfs4_layoutcommit_release(data); 8777 return -EAGAIN; 8778 } 8779 task_setup_data.flags = RPC_TASK_ASYNC; 8780 } 8781 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 8782 task = rpc_run_task(&task_setup_data); 8783 if (IS_ERR(task)) 8784 return PTR_ERR(task); 8785 if (sync) 8786 status = task->tk_status; 8787 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 8788 dprintk("%s: status %d\n", __func__, status); 8789 rpc_put_task(task); 8790 return status; 8791 } 8792 8793 /** 8794 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 8795 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 8796 */ 8797 static int 8798 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 8799 struct nfs_fsinfo *info, 8800 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8801 { 8802 struct nfs41_secinfo_no_name_args args = { 8803 .style = SECINFO_STYLE_CURRENT_FH, 8804 }; 8805 struct nfs4_secinfo_res res = { 8806 .flavors = flavors, 8807 }; 8808 struct rpc_message msg = { 8809 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 8810 .rpc_argp = &args, 8811 .rpc_resp = &res, 8812 }; 8813 struct rpc_clnt *clnt = server->client; 8814 struct rpc_cred *cred = NULL; 8815 int status; 8816 8817 if (use_integrity) { 8818 clnt = server->nfs_client->cl_rpcclient; 8819 cred = nfs4_get_clid_cred(server->nfs_client); 8820 msg.rpc_cred = cred; 8821 } 8822 8823 dprintk("--> %s\n", __func__); 8824 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 8825 &res.seq_res, 0); 8826 dprintk("<-- %s status=%d\n", __func__, status); 8827 8828 if (cred) 8829 put_rpccred(cred); 8830 8831 return status; 8832 } 8833 8834 static int 8835 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 8836 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 8837 { 8838 struct nfs4_exception exception = { }; 8839 int err; 8840 do { 8841 /* first try using integrity protection */ 8842 err = -NFS4ERR_WRONGSEC; 8843 8844 /* try to use integrity protection with machine cred */ 8845 if (_nfs4_is_integrity_protected(server->nfs_client)) 8846 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 8847 flavors, true); 8848 8849 /* 8850 * if unable to use integrity protection, or SECINFO with 8851 * integrity protection returns NFS4ERR_WRONGSEC (which is 8852 * disallowed by spec, but exists in deployed servers) use 8853 * the current filesystem's rpc_client and the user cred. 8854 */ 8855 if (err == -NFS4ERR_WRONGSEC) 8856 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 8857 flavors, false); 8858 8859 switch (err) { 8860 case 0: 8861 case -NFS4ERR_WRONGSEC: 8862 case -ENOTSUPP: 8863 goto out; 8864 default: 8865 err = nfs4_handle_exception(server, err, &exception); 8866 } 8867 } while (exception.retry); 8868 out: 8869 return err; 8870 } 8871 8872 static int 8873 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 8874 struct nfs_fsinfo *info) 8875 { 8876 int err; 8877 struct page *page; 8878 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 8879 struct nfs4_secinfo_flavors *flavors; 8880 struct nfs4_secinfo4 *secinfo; 8881 int i; 8882 8883 page = alloc_page(GFP_KERNEL); 8884 if (!page) { 8885 err = -ENOMEM; 8886 goto out; 8887 } 8888 8889 flavors = page_address(page); 8890 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 8891 8892 /* 8893 * Fall back on "guess and check" method if 8894 * the server doesn't support SECINFO_NO_NAME 8895 */ 8896 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 8897 err = nfs4_find_root_sec(server, fhandle, info); 8898 goto out_freepage; 8899 } 8900 if (err) 8901 goto out_freepage; 8902 8903 for (i = 0; i < flavors->num_flavors; i++) { 8904 secinfo = &flavors->flavors[i]; 8905 8906 switch (secinfo->flavor) { 8907 case RPC_AUTH_NULL: 8908 case RPC_AUTH_UNIX: 8909 case RPC_AUTH_GSS: 8910 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 8911 &secinfo->flavor_info); 8912 break; 8913 default: 8914 flavor = RPC_AUTH_MAXFLAVOR; 8915 break; 8916 } 8917 8918 if (!nfs_auth_info_match(&server->auth_info, flavor)) 8919 flavor = RPC_AUTH_MAXFLAVOR; 8920 8921 if (flavor != RPC_AUTH_MAXFLAVOR) { 8922 err = nfs4_lookup_root_sec(server, fhandle, 8923 info, flavor); 8924 if (!err) 8925 break; 8926 } 8927 } 8928 8929 if (flavor == RPC_AUTH_MAXFLAVOR) 8930 err = -EPERM; 8931 8932 out_freepage: 8933 put_page(page); 8934 if (err == -EACCES) 8935 return -EPERM; 8936 out: 8937 return err; 8938 } 8939 8940 static int _nfs41_test_stateid(struct nfs_server *server, 8941 nfs4_stateid *stateid, 8942 struct rpc_cred *cred) 8943 { 8944 int status; 8945 struct nfs41_test_stateid_args args = { 8946 .stateid = stateid, 8947 }; 8948 struct nfs41_test_stateid_res res; 8949 struct rpc_message msg = { 8950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 8951 .rpc_argp = &args, 8952 .rpc_resp = &res, 8953 .rpc_cred = cred, 8954 }; 8955 struct rpc_clnt *rpc_client = server->client; 8956 8957 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 8958 &rpc_client, &msg); 8959 8960 dprintk("NFS call test_stateid %p\n", stateid); 8961 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 8962 nfs4_set_sequence_privileged(&args.seq_args); 8963 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 8964 &args.seq_args, &res.seq_res); 8965 if (status != NFS_OK) { 8966 dprintk("NFS reply test_stateid: failed, %d\n", status); 8967 return status; 8968 } 8969 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 8970 return -res.status; 8971 } 8972 8973 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 8974 int err, struct nfs4_exception *exception) 8975 { 8976 exception->retry = 0; 8977 switch(err) { 8978 case -NFS4ERR_DELAY: 8979 case -NFS4ERR_RETRY_UNCACHED_REP: 8980 nfs4_handle_exception(server, err, exception); 8981 break; 8982 case -NFS4ERR_BADSESSION: 8983 case -NFS4ERR_BADSLOT: 8984 case -NFS4ERR_BAD_HIGH_SLOT: 8985 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 8986 case -NFS4ERR_DEADSESSION: 8987 nfs4_do_handle_exception(server, err, exception); 8988 } 8989 } 8990 8991 /** 8992 * nfs41_test_stateid - perform a TEST_STATEID operation 8993 * 8994 * @server: server / transport on which to perform the operation 8995 * @stateid: state ID to test 8996 * @cred: credential 8997 * 8998 * Returns NFS_OK if the server recognizes that "stateid" is valid. 8999 * Otherwise a negative NFS4ERR value is returned if the operation 9000 * failed or the state ID is not currently valid. 9001 */ 9002 static int nfs41_test_stateid(struct nfs_server *server, 9003 nfs4_stateid *stateid, 9004 struct rpc_cred *cred) 9005 { 9006 struct nfs4_exception exception = { }; 9007 int err; 9008 do { 9009 err = _nfs41_test_stateid(server, stateid, cred); 9010 nfs4_handle_delay_or_session_error(server, err, &exception); 9011 } while (exception.retry); 9012 return err; 9013 } 9014 9015 struct nfs_free_stateid_data { 9016 struct nfs_server *server; 9017 struct nfs41_free_stateid_args args; 9018 struct nfs41_free_stateid_res res; 9019 }; 9020 9021 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 9022 { 9023 struct nfs_free_stateid_data *data = calldata; 9024 nfs4_setup_sequence(data->server->nfs_client, 9025 &data->args.seq_args, 9026 &data->res.seq_res, 9027 task); 9028 } 9029 9030 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 9031 { 9032 struct nfs_free_stateid_data *data = calldata; 9033 9034 nfs41_sequence_done(task, &data->res.seq_res); 9035 9036 switch (task->tk_status) { 9037 case -NFS4ERR_DELAY: 9038 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 9039 rpc_restart_call_prepare(task); 9040 } 9041 } 9042 9043 static void nfs41_free_stateid_release(void *calldata) 9044 { 9045 kfree(calldata); 9046 } 9047 9048 static const struct rpc_call_ops nfs41_free_stateid_ops = { 9049 .rpc_call_prepare = nfs41_free_stateid_prepare, 9050 .rpc_call_done = nfs41_free_stateid_done, 9051 .rpc_release = nfs41_free_stateid_release, 9052 }; 9053 9054 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server, 9055 const nfs4_stateid *stateid, 9056 struct rpc_cred *cred, 9057 bool privileged) 9058 { 9059 struct rpc_message msg = { 9060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 9061 .rpc_cred = cred, 9062 }; 9063 struct rpc_task_setup task_setup = { 9064 .rpc_client = server->client, 9065 .rpc_message = &msg, 9066 .callback_ops = &nfs41_free_stateid_ops, 9067 .flags = RPC_TASK_ASYNC, 9068 }; 9069 struct nfs_free_stateid_data *data; 9070 9071 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 9072 &task_setup.rpc_client, &msg); 9073 9074 dprintk("NFS call free_stateid %p\n", stateid); 9075 data = kmalloc(sizeof(*data), GFP_NOFS); 9076 if (!data) 9077 return ERR_PTR(-ENOMEM); 9078 data->server = server; 9079 nfs4_stateid_copy(&data->args.stateid, stateid); 9080 9081 task_setup.callback_data = data; 9082 9083 msg.rpc_argp = &data->args; 9084 msg.rpc_resp = &data->res; 9085 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 9086 if (privileged) 9087 nfs4_set_sequence_privileged(&data->args.seq_args); 9088 9089 return rpc_run_task(&task_setup); 9090 } 9091 9092 /** 9093 * nfs41_free_stateid - perform a FREE_STATEID operation 9094 * 9095 * @server: server / transport on which to perform the operation 9096 * @stateid: state ID to release 9097 * @cred: credential 9098 * @is_recovery: set to true if this call needs to be privileged 9099 * 9100 * Note: this function is always asynchronous. 9101 */ 9102 static int nfs41_free_stateid(struct nfs_server *server, 9103 const nfs4_stateid *stateid, 9104 struct rpc_cred *cred, 9105 bool is_recovery) 9106 { 9107 struct rpc_task *task; 9108 9109 task = _nfs41_free_stateid(server, stateid, cred, is_recovery); 9110 if (IS_ERR(task)) 9111 return PTR_ERR(task); 9112 rpc_put_task(task); 9113 return 0; 9114 } 9115 9116 static void 9117 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 9118 { 9119 struct rpc_cred *cred = lsp->ls_state->owner->so_cred; 9120 9121 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 9122 nfs4_free_lock_state(server, lsp); 9123 } 9124 9125 static bool nfs41_match_stateid(const nfs4_stateid *s1, 9126 const nfs4_stateid *s2) 9127 { 9128 if (s1->type != s2->type) 9129 return false; 9130 9131 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 9132 return false; 9133 9134 if (s1->seqid == s2->seqid) 9135 return true; 9136 9137 return s1->seqid == 0 || s2->seqid == 0; 9138 } 9139 9140 #endif /* CONFIG_NFS_V4_1 */ 9141 9142 static bool nfs4_match_stateid(const nfs4_stateid *s1, 9143 const nfs4_stateid *s2) 9144 { 9145 return nfs4_stateid_match(s1, s2); 9146 } 9147 9148 9149 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 9150 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 9151 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 9152 .recover_open = nfs4_open_reclaim, 9153 .recover_lock = nfs4_lock_reclaim, 9154 .establish_clid = nfs4_init_clientid, 9155 .detect_trunking = nfs40_discover_server_trunking, 9156 }; 9157 9158 #if defined(CONFIG_NFS_V4_1) 9159 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 9160 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 9161 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 9162 .recover_open = nfs4_open_reclaim, 9163 .recover_lock = nfs4_lock_reclaim, 9164 .establish_clid = nfs41_init_clientid, 9165 .reclaim_complete = nfs41_proc_reclaim_complete, 9166 .detect_trunking = nfs41_discover_server_trunking, 9167 }; 9168 #endif /* CONFIG_NFS_V4_1 */ 9169 9170 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 9171 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 9172 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 9173 .recover_open = nfs40_open_expired, 9174 .recover_lock = nfs4_lock_expired, 9175 .establish_clid = nfs4_init_clientid, 9176 }; 9177 9178 #if defined(CONFIG_NFS_V4_1) 9179 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 9180 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 9181 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 9182 .recover_open = nfs41_open_expired, 9183 .recover_lock = nfs41_lock_expired, 9184 .establish_clid = nfs41_init_clientid, 9185 }; 9186 #endif /* CONFIG_NFS_V4_1 */ 9187 9188 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 9189 .sched_state_renewal = nfs4_proc_async_renew, 9190 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, 9191 .renew_lease = nfs4_proc_renew, 9192 }; 9193 9194 #if defined(CONFIG_NFS_V4_1) 9195 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 9196 .sched_state_renewal = nfs41_proc_async_sequence, 9197 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, 9198 .renew_lease = nfs4_proc_sequence, 9199 }; 9200 #endif 9201 9202 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 9203 .get_locations = _nfs40_proc_get_locations, 9204 .fsid_present = _nfs40_proc_fsid_present, 9205 }; 9206 9207 #if defined(CONFIG_NFS_V4_1) 9208 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 9209 .get_locations = _nfs41_proc_get_locations, 9210 .fsid_present = _nfs41_proc_fsid_present, 9211 }; 9212 #endif /* CONFIG_NFS_V4_1 */ 9213 9214 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 9215 .minor_version = 0, 9216 .init_caps = NFS_CAP_READDIRPLUS 9217 | NFS_CAP_ATOMIC_OPEN 9218 | NFS_CAP_POSIX_LOCK, 9219 .init_client = nfs40_init_client, 9220 .shutdown_client = nfs40_shutdown_client, 9221 .match_stateid = nfs4_match_stateid, 9222 .find_root_sec = nfs4_find_root_sec, 9223 .free_lock_state = nfs4_release_lockowner, 9224 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 9225 .alloc_seqid = nfs_alloc_seqid, 9226 .call_sync_ops = &nfs40_call_sync_ops, 9227 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 9228 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 9229 .state_renewal_ops = &nfs40_state_renewal_ops, 9230 .mig_recovery_ops = &nfs40_mig_recovery_ops, 9231 }; 9232 9233 #if defined(CONFIG_NFS_V4_1) 9234 static struct nfs_seqid * 9235 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 9236 { 9237 return NULL; 9238 } 9239 9240 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 9241 .minor_version = 1, 9242 .init_caps = NFS_CAP_READDIRPLUS 9243 | NFS_CAP_ATOMIC_OPEN 9244 | NFS_CAP_POSIX_LOCK 9245 | NFS_CAP_STATEID_NFSV41 9246 | NFS_CAP_ATOMIC_OPEN_V1, 9247 .init_client = nfs41_init_client, 9248 .shutdown_client = nfs41_shutdown_client, 9249 .match_stateid = nfs41_match_stateid, 9250 .find_root_sec = nfs41_find_root_sec, 9251 .free_lock_state = nfs41_free_lock_state, 9252 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 9253 .alloc_seqid = nfs_alloc_no_seqid, 9254 .session_trunk = nfs4_test_session_trunk, 9255 .call_sync_ops = &nfs41_call_sync_ops, 9256 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 9257 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 9258 .state_renewal_ops = &nfs41_state_renewal_ops, 9259 .mig_recovery_ops = &nfs41_mig_recovery_ops, 9260 }; 9261 #endif 9262 9263 #if defined(CONFIG_NFS_V4_2) 9264 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 9265 .minor_version = 2, 9266 .init_caps = NFS_CAP_READDIRPLUS 9267 | NFS_CAP_ATOMIC_OPEN 9268 | NFS_CAP_POSIX_LOCK 9269 | NFS_CAP_STATEID_NFSV41 9270 | NFS_CAP_ATOMIC_OPEN_V1 9271 | NFS_CAP_ALLOCATE 9272 | NFS_CAP_COPY 9273 | NFS_CAP_DEALLOCATE 9274 | NFS_CAP_SEEK 9275 | NFS_CAP_LAYOUTSTATS 9276 | NFS_CAP_CLONE, 9277 .init_client = nfs41_init_client, 9278 .shutdown_client = nfs41_shutdown_client, 9279 .match_stateid = nfs41_match_stateid, 9280 .find_root_sec = nfs41_find_root_sec, 9281 .free_lock_state = nfs41_free_lock_state, 9282 .call_sync_ops = &nfs41_call_sync_ops, 9283 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 9284 .alloc_seqid = nfs_alloc_no_seqid, 9285 .session_trunk = nfs4_test_session_trunk, 9286 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 9287 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 9288 .state_renewal_ops = &nfs41_state_renewal_ops, 9289 .mig_recovery_ops = &nfs41_mig_recovery_ops, 9290 }; 9291 #endif 9292 9293 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 9294 [0] = &nfs_v4_0_minor_ops, 9295 #if defined(CONFIG_NFS_V4_1) 9296 [1] = &nfs_v4_1_minor_ops, 9297 #endif 9298 #if defined(CONFIG_NFS_V4_2) 9299 [2] = &nfs_v4_2_minor_ops, 9300 #endif 9301 }; 9302 9303 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 9304 { 9305 ssize_t error, error2; 9306 9307 error = generic_listxattr(dentry, list, size); 9308 if (error < 0) 9309 return error; 9310 if (list) { 9311 list += error; 9312 size -= error; 9313 } 9314 9315 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); 9316 if (error2 < 0) 9317 return error2; 9318 return error + error2; 9319 } 9320 9321 static const struct inode_operations nfs4_dir_inode_operations = { 9322 .create = nfs_create, 9323 .lookup = nfs_lookup, 9324 .atomic_open = nfs_atomic_open, 9325 .link = nfs_link, 9326 .unlink = nfs_unlink, 9327 .symlink = nfs_symlink, 9328 .mkdir = nfs_mkdir, 9329 .rmdir = nfs_rmdir, 9330 .mknod = nfs_mknod, 9331 .rename = nfs_rename, 9332 .permission = nfs_permission, 9333 .getattr = nfs_getattr, 9334 .setattr = nfs_setattr, 9335 .listxattr = nfs4_listxattr, 9336 }; 9337 9338 static const struct inode_operations nfs4_file_inode_operations = { 9339 .permission = nfs_permission, 9340 .getattr = nfs_getattr, 9341 .setattr = nfs_setattr, 9342 .listxattr = nfs4_listxattr, 9343 }; 9344 9345 const struct nfs_rpc_ops nfs_v4_clientops = { 9346 .version = 4, /* protocol version */ 9347 .dentry_ops = &nfs4_dentry_operations, 9348 .dir_inode_ops = &nfs4_dir_inode_operations, 9349 .file_inode_ops = &nfs4_file_inode_operations, 9350 .file_ops = &nfs4_file_operations, 9351 .getroot = nfs4_proc_get_root, 9352 .submount = nfs4_submount, 9353 .try_mount = nfs4_try_mount, 9354 .getattr = nfs4_proc_getattr, 9355 .setattr = nfs4_proc_setattr, 9356 .lookup = nfs4_proc_lookup, 9357 .lookupp = nfs4_proc_lookupp, 9358 .access = nfs4_proc_access, 9359 .readlink = nfs4_proc_readlink, 9360 .create = nfs4_proc_create, 9361 .remove = nfs4_proc_remove, 9362 .unlink_setup = nfs4_proc_unlink_setup, 9363 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 9364 .unlink_done = nfs4_proc_unlink_done, 9365 .rename_setup = nfs4_proc_rename_setup, 9366 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 9367 .rename_done = nfs4_proc_rename_done, 9368 .link = nfs4_proc_link, 9369 .symlink = nfs4_proc_symlink, 9370 .mkdir = nfs4_proc_mkdir, 9371 .rmdir = nfs4_proc_remove, 9372 .readdir = nfs4_proc_readdir, 9373 .mknod = nfs4_proc_mknod, 9374 .statfs = nfs4_proc_statfs, 9375 .fsinfo = nfs4_proc_fsinfo, 9376 .pathconf = nfs4_proc_pathconf, 9377 .set_capabilities = nfs4_server_capabilities, 9378 .decode_dirent = nfs4_decode_dirent, 9379 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 9380 .read_setup = nfs4_proc_read_setup, 9381 .read_done = nfs4_read_done, 9382 .write_setup = nfs4_proc_write_setup, 9383 .write_done = nfs4_write_done, 9384 .commit_setup = nfs4_proc_commit_setup, 9385 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 9386 .commit_done = nfs4_commit_done, 9387 .lock = nfs4_proc_lock, 9388 .clear_acl_cache = nfs4_zap_acl_attr, 9389 .close_context = nfs4_close_context, 9390 .open_context = nfs4_atomic_open, 9391 .have_delegation = nfs4_have_delegation, 9392 .return_delegation = nfs4_inode_return_delegation, 9393 .alloc_client = nfs4_alloc_client, 9394 .init_client = nfs4_init_client, 9395 .free_client = nfs4_free_client, 9396 .create_server = nfs4_create_server, 9397 .clone_server = nfs_clone_server, 9398 }; 9399 9400 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 9401 .name = XATTR_NAME_NFSV4_ACL, 9402 .list = nfs4_xattr_list_nfs4_acl, 9403 .get = nfs4_xattr_get_nfs4_acl, 9404 .set = nfs4_xattr_set_nfs4_acl, 9405 }; 9406 9407 const struct xattr_handler *nfs4_xattr_handlers[] = { 9408 &nfs4_xattr_nfs4_acl_handler, 9409 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 9410 &nfs4_xattr_nfs4_label_handler, 9411 #endif 9412 NULL 9413 }; 9414 9415 /* 9416 * Local variables: 9417 * c-basic-offset: 8 9418 * End: 9419 */ 9420