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/file.h> 42 #include <linux/string.h> 43 #include <linux/ratelimit.h> 44 #include <linux/printk.h> 45 #include <linux/slab.h> 46 #include <linux/sunrpc/clnt.h> 47 #include <linux/nfs.h> 48 #include <linux/nfs4.h> 49 #include <linux/nfs_fs.h> 50 #include <linux/nfs_page.h> 51 #include <linux/nfs_mount.h> 52 #include <linux/namei.h> 53 #include <linux/mount.h> 54 #include <linux/module.h> 55 #include <linux/xattr.h> 56 #include <linux/utsname.h> 57 #include <linux/freezer.h> 58 59 #include "nfs4_fs.h" 60 #include "delegation.h" 61 #include "internal.h" 62 #include "iostat.h" 63 #include "callback.h" 64 #include "pnfs.h" 65 #include "netns.h" 66 #include "nfs4idmap.h" 67 #include "nfs4session.h" 68 #include "fscache.h" 69 70 #include "nfs4trace.h" 71 72 #define NFSDBG_FACILITY NFSDBG_PROC 73 74 #define NFS4_POLL_RETRY_MIN (HZ/10) 75 #define NFS4_POLL_RETRY_MAX (15*HZ) 76 77 /* file attributes which can be mapped to nfs attributes */ 78 #define NFS4_VALID_ATTRS (ATTR_MODE \ 79 | ATTR_UID \ 80 | ATTR_GID \ 81 | ATTR_SIZE \ 82 | ATTR_ATIME \ 83 | ATTR_MTIME \ 84 | ATTR_CTIME \ 85 | ATTR_ATIME_SET \ 86 | ATTR_MTIME_SET) 87 88 struct nfs4_opendata; 89 static int _nfs4_proc_open(struct nfs4_opendata *data); 90 static int _nfs4_recover_proc_open(struct nfs4_opendata *data); 91 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 92 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); 93 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label); 94 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label); 95 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 96 struct nfs_fattr *fattr, struct iattr *sattr, 97 struct nfs4_state *state, struct nfs4_label *ilabel, 98 struct nfs4_label *olabel); 99 #ifdef CONFIG_NFS_V4_1 100 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 101 struct rpc_cred *); 102 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *, 103 struct rpc_cred *); 104 #endif 105 106 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 107 static inline struct nfs4_label * 108 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 109 struct iattr *sattr, struct nfs4_label *label) 110 { 111 int err; 112 113 if (label == NULL) 114 return NULL; 115 116 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 117 return NULL; 118 119 err = security_dentry_init_security(dentry, sattr->ia_mode, 120 &dentry->d_name, (void **)&label->label, &label->len); 121 if (err == 0) 122 return label; 123 124 return NULL; 125 } 126 static inline void 127 nfs4_label_release_security(struct nfs4_label *label) 128 { 129 if (label) 130 security_release_secctx(label->label, label->len); 131 } 132 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 133 { 134 if (label) 135 return server->attr_bitmask; 136 137 return server->attr_bitmask_nl; 138 } 139 #else 140 static inline struct nfs4_label * 141 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 142 struct iattr *sattr, struct nfs4_label *l) 143 { return NULL; } 144 static inline void 145 nfs4_label_release_security(struct nfs4_label *label) 146 { return; } 147 static inline u32 * 148 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 149 { return server->attr_bitmask; } 150 #endif 151 152 /* Prevent leaks of NFSv4 errors into userland */ 153 static int nfs4_map_errors(int err) 154 { 155 if (err >= -1000) 156 return err; 157 switch (err) { 158 case -NFS4ERR_RESOURCE: 159 case -NFS4ERR_LAYOUTTRYLATER: 160 case -NFS4ERR_RECALLCONFLICT: 161 return -EREMOTEIO; 162 case -NFS4ERR_WRONGSEC: 163 case -NFS4ERR_WRONG_CRED: 164 return -EPERM; 165 case -NFS4ERR_BADOWNER: 166 case -NFS4ERR_BADNAME: 167 return -EINVAL; 168 case -NFS4ERR_SHARE_DENIED: 169 return -EACCES; 170 case -NFS4ERR_MINOR_VERS_MISMATCH: 171 return -EPROTONOSUPPORT; 172 case -NFS4ERR_FILE_OPEN: 173 return -EBUSY; 174 default: 175 dprintk("%s could not handle NFSv4 error %d\n", 176 __func__, -err); 177 break; 178 } 179 return -EIO; 180 } 181 182 /* 183 * This is our standard bitmap for GETATTR requests. 184 */ 185 const u32 nfs4_fattr_bitmap[3] = { 186 FATTR4_WORD0_TYPE 187 | FATTR4_WORD0_CHANGE 188 | FATTR4_WORD0_SIZE 189 | FATTR4_WORD0_FSID 190 | FATTR4_WORD0_FILEID, 191 FATTR4_WORD1_MODE 192 | FATTR4_WORD1_NUMLINKS 193 | FATTR4_WORD1_OWNER 194 | FATTR4_WORD1_OWNER_GROUP 195 | FATTR4_WORD1_RAWDEV 196 | FATTR4_WORD1_SPACE_USED 197 | FATTR4_WORD1_TIME_ACCESS 198 | FATTR4_WORD1_TIME_METADATA 199 | FATTR4_WORD1_TIME_MODIFY 200 | FATTR4_WORD1_MOUNTED_ON_FILEID, 201 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 202 FATTR4_WORD2_SECURITY_LABEL 203 #endif 204 }; 205 206 static const u32 nfs4_pnfs_open_bitmap[3] = { 207 FATTR4_WORD0_TYPE 208 | FATTR4_WORD0_CHANGE 209 | FATTR4_WORD0_SIZE 210 | FATTR4_WORD0_FSID 211 | FATTR4_WORD0_FILEID, 212 FATTR4_WORD1_MODE 213 | FATTR4_WORD1_NUMLINKS 214 | FATTR4_WORD1_OWNER 215 | FATTR4_WORD1_OWNER_GROUP 216 | FATTR4_WORD1_RAWDEV 217 | FATTR4_WORD1_SPACE_USED 218 | FATTR4_WORD1_TIME_ACCESS 219 | FATTR4_WORD1_TIME_METADATA 220 | FATTR4_WORD1_TIME_MODIFY, 221 FATTR4_WORD2_MDSTHRESHOLD 222 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 223 | FATTR4_WORD2_SECURITY_LABEL 224 #endif 225 }; 226 227 static const u32 nfs4_open_noattr_bitmap[3] = { 228 FATTR4_WORD0_TYPE 229 | FATTR4_WORD0_CHANGE 230 | FATTR4_WORD0_FILEID, 231 }; 232 233 const u32 nfs4_statfs_bitmap[3] = { 234 FATTR4_WORD0_FILES_AVAIL 235 | FATTR4_WORD0_FILES_FREE 236 | FATTR4_WORD0_FILES_TOTAL, 237 FATTR4_WORD1_SPACE_AVAIL 238 | FATTR4_WORD1_SPACE_FREE 239 | FATTR4_WORD1_SPACE_TOTAL 240 }; 241 242 const u32 nfs4_pathconf_bitmap[3] = { 243 FATTR4_WORD0_MAXLINK 244 | FATTR4_WORD0_MAXNAME, 245 0 246 }; 247 248 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 249 | FATTR4_WORD0_MAXREAD 250 | FATTR4_WORD0_MAXWRITE 251 | FATTR4_WORD0_LEASE_TIME, 252 FATTR4_WORD1_TIME_DELTA 253 | FATTR4_WORD1_FS_LAYOUT_TYPES, 254 FATTR4_WORD2_LAYOUT_BLKSIZE 255 | FATTR4_WORD2_CLONE_BLKSIZE 256 }; 257 258 const u32 nfs4_fs_locations_bitmap[3] = { 259 FATTR4_WORD0_TYPE 260 | FATTR4_WORD0_CHANGE 261 | FATTR4_WORD0_SIZE 262 | FATTR4_WORD0_FSID 263 | FATTR4_WORD0_FILEID 264 | FATTR4_WORD0_FS_LOCATIONS, 265 FATTR4_WORD1_MODE 266 | FATTR4_WORD1_NUMLINKS 267 | FATTR4_WORD1_OWNER 268 | FATTR4_WORD1_OWNER_GROUP 269 | FATTR4_WORD1_RAWDEV 270 | FATTR4_WORD1_SPACE_USED 271 | FATTR4_WORD1_TIME_ACCESS 272 | FATTR4_WORD1_TIME_METADATA 273 | FATTR4_WORD1_TIME_MODIFY 274 | FATTR4_WORD1_MOUNTED_ON_FILEID, 275 }; 276 277 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 278 struct nfs4_readdir_arg *readdir) 279 { 280 __be32 *start, *p; 281 282 if (cookie > 2) { 283 readdir->cookie = cookie; 284 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 285 return; 286 } 287 288 readdir->cookie = 0; 289 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 290 if (cookie == 2) 291 return; 292 293 /* 294 * NFSv4 servers do not return entries for '.' and '..' 295 * Therefore, we fake these entries here. We let '.' 296 * have cookie 0 and '..' have cookie 1. Note that 297 * when talking to the server, we always send cookie 0 298 * instead of 1 or 2. 299 */ 300 start = p = kmap_atomic(*readdir->pages); 301 302 if (cookie == 0) { 303 *p++ = xdr_one; /* next */ 304 *p++ = xdr_zero; /* cookie, first word */ 305 *p++ = xdr_one; /* cookie, second word */ 306 *p++ = xdr_one; /* entry len */ 307 memcpy(p, ".\0\0\0", 4); /* entry */ 308 p++; 309 *p++ = xdr_one; /* bitmap length */ 310 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ 311 *p++ = htonl(8); /* attribute buffer length */ 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(FATTR4_WORD0_FILEID); /* bitmap */ 323 *p++ = htonl(8); /* attribute buffer length */ 324 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 325 326 readdir->pgbase = (char *)p - (char *)start; 327 readdir->count -= readdir->pgbase; 328 kunmap_atomic(start); 329 } 330 331 static long nfs4_update_delay(long *timeout) 332 { 333 long ret; 334 if (!timeout) 335 return NFS4_POLL_RETRY_MAX; 336 if (*timeout <= 0) 337 *timeout = NFS4_POLL_RETRY_MIN; 338 if (*timeout > NFS4_POLL_RETRY_MAX) 339 *timeout = NFS4_POLL_RETRY_MAX; 340 ret = *timeout; 341 *timeout <<= 1; 342 return ret; 343 } 344 345 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) 346 { 347 int res = 0; 348 349 might_sleep(); 350 351 freezable_schedule_timeout_killable_unsafe( 352 nfs4_update_delay(timeout)); 353 if (fatal_signal_pending(current)) 354 res = -ERESTARTSYS; 355 return res; 356 } 357 358 /* This is the error handling routine for processes that are allowed 359 * to sleep. 360 */ 361 static int nfs4_do_handle_exception(struct nfs_server *server, 362 int errorcode, struct nfs4_exception *exception) 363 { 364 struct nfs_client *clp = server->nfs_client; 365 struct nfs4_state *state = exception->state; 366 struct inode *inode = exception->inode; 367 int ret = errorcode; 368 369 exception->delay = 0; 370 exception->recovering = 0; 371 exception->retry = 0; 372 switch(errorcode) { 373 case 0: 374 return 0; 375 case -NFS4ERR_OPENMODE: 376 case -NFS4ERR_DELEG_REVOKED: 377 case -NFS4ERR_ADMIN_REVOKED: 378 case -NFS4ERR_BAD_STATEID: 379 if (inode && nfs_async_inode_return_delegation(inode, 380 NULL) == 0) 381 goto wait_on_recovery; 382 if (state == NULL) 383 break; 384 ret = nfs4_schedule_stateid_recovery(server, state); 385 if (ret < 0) 386 break; 387 goto wait_on_recovery; 388 case -NFS4ERR_EXPIRED: 389 if (state != NULL) { 390 ret = nfs4_schedule_stateid_recovery(server, state); 391 if (ret < 0) 392 break; 393 } 394 case -NFS4ERR_STALE_STATEID: 395 case -NFS4ERR_STALE_CLIENTID: 396 nfs4_schedule_lease_recovery(clp); 397 goto wait_on_recovery; 398 case -NFS4ERR_MOVED: 399 ret = nfs4_schedule_migration_recovery(server); 400 if (ret < 0) 401 break; 402 goto wait_on_recovery; 403 case -NFS4ERR_LEASE_MOVED: 404 nfs4_schedule_lease_moved_recovery(clp); 405 goto wait_on_recovery; 406 #if defined(CONFIG_NFS_V4_1) 407 case -NFS4ERR_BADSESSION: 408 case -NFS4ERR_BADSLOT: 409 case -NFS4ERR_BAD_HIGH_SLOT: 410 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 411 case -NFS4ERR_DEADSESSION: 412 case -NFS4ERR_SEQ_FALSE_RETRY: 413 case -NFS4ERR_SEQ_MISORDERED: 414 dprintk("%s ERROR: %d Reset session\n", __func__, 415 errorcode); 416 nfs4_schedule_session_recovery(clp->cl_session, errorcode); 417 goto wait_on_recovery; 418 #endif /* defined(CONFIG_NFS_V4_1) */ 419 case -NFS4ERR_FILE_OPEN: 420 if (exception->timeout > HZ) { 421 /* We have retried a decent amount, time to 422 * fail 423 */ 424 ret = -EBUSY; 425 break; 426 } 427 case -NFS4ERR_DELAY: 428 nfs_inc_server_stats(server, NFSIOS_DELAY); 429 case -NFS4ERR_GRACE: 430 case -NFS4ERR_RECALLCONFLICT: 431 exception->delay = 1; 432 return 0; 433 434 case -NFS4ERR_RETRY_UNCACHED_REP: 435 case -NFS4ERR_OLD_STATEID: 436 exception->retry = 1; 437 break; 438 case -NFS4ERR_BADOWNER: 439 /* The following works around a Linux server bug! */ 440 case -NFS4ERR_BADNAME: 441 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 442 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 443 exception->retry = 1; 444 printk(KERN_WARNING "NFS: v4 server %s " 445 "does not accept raw " 446 "uid/gids. " 447 "Reenabling the idmapper.\n", 448 server->nfs_client->cl_hostname); 449 } 450 } 451 /* We failed to handle the error */ 452 return nfs4_map_errors(ret); 453 wait_on_recovery: 454 exception->recovering = 1; 455 return 0; 456 } 457 458 /* This is the error handling routine for processes that are allowed 459 * to sleep. 460 */ 461 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 462 { 463 struct nfs_client *clp = server->nfs_client; 464 int ret; 465 466 ret = nfs4_do_handle_exception(server, errorcode, exception); 467 if (exception->delay) { 468 ret = nfs4_delay(server->client, &exception->timeout); 469 goto out_retry; 470 } 471 if (exception->recovering) { 472 ret = nfs4_wait_clnt_recover(clp); 473 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 474 return -EIO; 475 goto out_retry; 476 } 477 return ret; 478 out_retry: 479 if (ret == 0) 480 exception->retry = 1; 481 return ret; 482 } 483 484 static int 485 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 486 int errorcode, struct nfs4_exception *exception) 487 { 488 struct nfs_client *clp = server->nfs_client; 489 int ret; 490 491 ret = nfs4_do_handle_exception(server, errorcode, exception); 492 if (exception->delay) { 493 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 494 goto out_retry; 495 } 496 if (exception->recovering) { 497 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 498 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 499 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 500 goto out_retry; 501 } 502 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 503 ret = -EIO; 504 return ret; 505 out_retry: 506 if (ret == 0) 507 exception->retry = 1; 508 return ret; 509 } 510 511 static int 512 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 513 struct nfs4_state *state, long *timeout) 514 { 515 struct nfs4_exception exception = { 516 .state = state, 517 }; 518 519 if (task->tk_status >= 0) 520 return 0; 521 if (timeout) 522 exception.timeout = *timeout; 523 task->tk_status = nfs4_async_handle_exception(task, server, 524 task->tk_status, 525 &exception); 526 if (exception.delay && timeout) 527 *timeout = exception.timeout; 528 if (exception.retry) 529 return -EAGAIN; 530 return 0; 531 } 532 533 /* 534 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 535 * or 'false' otherwise. 536 */ 537 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 538 { 539 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 540 541 if (flavor == RPC_AUTH_GSS_KRB5I || 542 flavor == RPC_AUTH_GSS_KRB5P) 543 return true; 544 545 return false; 546 } 547 548 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 549 { 550 spin_lock(&clp->cl_lock); 551 if (time_before(clp->cl_last_renewal,timestamp)) 552 clp->cl_last_renewal = timestamp; 553 spin_unlock(&clp->cl_lock); 554 } 555 556 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 557 { 558 struct nfs_client *clp = server->nfs_client; 559 560 if (!nfs4_has_session(clp)) 561 do_renew_lease(clp, timestamp); 562 } 563 564 struct nfs4_call_sync_data { 565 const struct nfs_server *seq_server; 566 struct nfs4_sequence_args *seq_args; 567 struct nfs4_sequence_res *seq_res; 568 }; 569 570 void nfs4_init_sequence(struct nfs4_sequence_args *args, 571 struct nfs4_sequence_res *res, int cache_reply) 572 { 573 args->sa_slot = NULL; 574 args->sa_cache_this = cache_reply; 575 args->sa_privileged = 0; 576 577 res->sr_slot = NULL; 578 } 579 580 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args) 581 { 582 args->sa_privileged = 1; 583 } 584 585 int nfs40_setup_sequence(struct nfs4_slot_table *tbl, 586 struct nfs4_sequence_args *args, 587 struct nfs4_sequence_res *res, 588 struct rpc_task *task) 589 { 590 struct nfs4_slot *slot; 591 592 /* slot already allocated? */ 593 if (res->sr_slot != NULL) 594 goto out_start; 595 596 spin_lock(&tbl->slot_tbl_lock); 597 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 598 goto out_sleep; 599 600 slot = nfs4_alloc_slot(tbl); 601 if (IS_ERR(slot)) { 602 if (slot == ERR_PTR(-ENOMEM)) 603 task->tk_timeout = HZ >> 2; 604 goto out_sleep; 605 } 606 spin_unlock(&tbl->slot_tbl_lock); 607 608 args->sa_slot = slot; 609 res->sr_slot = slot; 610 611 out_start: 612 rpc_call_start(task); 613 return 0; 614 615 out_sleep: 616 if (args->sa_privileged) 617 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 618 NULL, RPC_PRIORITY_PRIVILEGED); 619 else 620 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 621 spin_unlock(&tbl->slot_tbl_lock); 622 return -EAGAIN; 623 } 624 EXPORT_SYMBOL_GPL(nfs40_setup_sequence); 625 626 static int nfs40_sequence_done(struct rpc_task *task, 627 struct nfs4_sequence_res *res) 628 { 629 struct nfs4_slot *slot = res->sr_slot; 630 struct nfs4_slot_table *tbl; 631 632 if (slot == NULL) 633 goto out; 634 635 tbl = slot->table; 636 spin_lock(&tbl->slot_tbl_lock); 637 if (!nfs41_wake_and_assign_slot(tbl, slot)) 638 nfs4_free_slot(tbl, slot); 639 spin_unlock(&tbl->slot_tbl_lock); 640 641 res->sr_slot = NULL; 642 out: 643 return 1; 644 } 645 646 #if defined(CONFIG_NFS_V4_1) 647 648 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 649 { 650 struct nfs4_session *session; 651 struct nfs4_slot_table *tbl; 652 struct nfs4_slot *slot = res->sr_slot; 653 bool send_new_highest_used_slotid = false; 654 655 tbl = slot->table; 656 session = tbl->session; 657 658 spin_lock(&tbl->slot_tbl_lock); 659 /* Be nice to the server: try to ensure that the last transmitted 660 * value for highest_user_slotid <= target_highest_slotid 661 */ 662 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 663 send_new_highest_used_slotid = true; 664 665 if (nfs41_wake_and_assign_slot(tbl, slot)) { 666 send_new_highest_used_slotid = false; 667 goto out_unlock; 668 } 669 nfs4_free_slot(tbl, slot); 670 671 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 672 send_new_highest_used_slotid = false; 673 out_unlock: 674 spin_unlock(&tbl->slot_tbl_lock); 675 res->sr_slot = NULL; 676 if (send_new_highest_used_slotid) 677 nfs41_notify_server(session->clp); 678 } 679 680 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 681 { 682 struct nfs4_session *session; 683 struct nfs4_slot *slot = res->sr_slot; 684 struct nfs_client *clp; 685 bool interrupted = false; 686 int ret = 1; 687 688 if (slot == NULL) 689 goto out_noaction; 690 /* don't increment the sequence number if the task wasn't sent */ 691 if (!RPC_WAS_SENT(task)) 692 goto out; 693 694 session = slot->table->session; 695 696 if (slot->interrupted) { 697 slot->interrupted = 0; 698 interrupted = true; 699 } 700 701 trace_nfs4_sequence_done(session, res); 702 /* Check the SEQUENCE operation status */ 703 switch (res->sr_status) { 704 case 0: 705 /* Update the slot's sequence and clientid lease timer */ 706 ++slot->seq_nr; 707 clp = session->clp; 708 do_renew_lease(clp, res->sr_timestamp); 709 /* Check sequence flags */ 710 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); 711 nfs41_update_target_slotid(slot->table, slot, res); 712 break; 713 case 1: 714 /* 715 * sr_status remains 1 if an RPC level error occurred. 716 * The server may or may not have processed the sequence 717 * operation.. 718 * Mark the slot as having hosted an interrupted RPC call. 719 */ 720 slot->interrupted = 1; 721 goto out; 722 case -NFS4ERR_DELAY: 723 /* The server detected a resend of the RPC call and 724 * returned NFS4ERR_DELAY as per Section 2.10.6.2 725 * of RFC5661. 726 */ 727 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 728 __func__, 729 slot->slot_nr, 730 slot->seq_nr); 731 goto out_retry; 732 case -NFS4ERR_BADSLOT: 733 /* 734 * The slot id we used was probably retired. Try again 735 * using a different slot id. 736 */ 737 goto retry_nowait; 738 case -NFS4ERR_SEQ_MISORDERED: 739 /* 740 * Was the last operation on this sequence interrupted? 741 * If so, retry after bumping the sequence number. 742 */ 743 if (interrupted) { 744 ++slot->seq_nr; 745 goto retry_nowait; 746 } 747 /* 748 * Could this slot have been previously retired? 749 * If so, then the server may be expecting seq_nr = 1! 750 */ 751 if (slot->seq_nr != 1) { 752 slot->seq_nr = 1; 753 goto retry_nowait; 754 } 755 break; 756 case -NFS4ERR_SEQ_FALSE_RETRY: 757 ++slot->seq_nr; 758 goto retry_nowait; 759 default: 760 /* Just update the slot sequence no. */ 761 ++slot->seq_nr; 762 } 763 out: 764 /* The session may be reset by one of the error handlers. */ 765 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 766 nfs41_sequence_free_slot(res); 767 out_noaction: 768 return ret; 769 retry_nowait: 770 if (rpc_restart_call_prepare(task)) { 771 task->tk_status = 0; 772 ret = 0; 773 } 774 goto out; 775 out_retry: 776 if (!rpc_restart_call(task)) 777 goto out; 778 rpc_delay(task, NFS4_POLL_RETRY_MAX); 779 return 0; 780 } 781 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 782 783 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 784 { 785 if (res->sr_slot == NULL) 786 return 1; 787 if (!res->sr_slot->table->session) 788 return nfs40_sequence_done(task, res); 789 return nfs41_sequence_done(task, res); 790 } 791 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 792 793 int nfs41_setup_sequence(struct nfs4_session *session, 794 struct nfs4_sequence_args *args, 795 struct nfs4_sequence_res *res, 796 struct rpc_task *task) 797 { 798 struct nfs4_slot *slot; 799 struct nfs4_slot_table *tbl; 800 801 dprintk("--> %s\n", __func__); 802 /* slot already allocated? */ 803 if (res->sr_slot != NULL) 804 goto out_success; 805 806 tbl = &session->fc_slot_table; 807 808 task->tk_timeout = 0; 809 810 spin_lock(&tbl->slot_tbl_lock); 811 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) && 812 !args->sa_privileged) { 813 /* The state manager will wait until the slot table is empty */ 814 dprintk("%s session is draining\n", __func__); 815 goto out_sleep; 816 } 817 818 slot = nfs4_alloc_slot(tbl); 819 if (IS_ERR(slot)) { 820 /* If out of memory, try again in 1/4 second */ 821 if (slot == ERR_PTR(-ENOMEM)) 822 task->tk_timeout = HZ >> 2; 823 dprintk("<-- %s: no free slots\n", __func__); 824 goto out_sleep; 825 } 826 spin_unlock(&tbl->slot_tbl_lock); 827 828 args->sa_slot = slot; 829 830 dprintk("<-- %s slotid=%u seqid=%u\n", __func__, 831 slot->slot_nr, slot->seq_nr); 832 833 res->sr_slot = slot; 834 res->sr_timestamp = jiffies; 835 res->sr_status_flags = 0; 836 /* 837 * sr_status is only set in decode_sequence, and so will remain 838 * set to 1 if an rpc level failure occurs. 839 */ 840 res->sr_status = 1; 841 trace_nfs4_setup_sequence(session, args); 842 out_success: 843 rpc_call_start(task); 844 return 0; 845 out_sleep: 846 /* Privileged tasks are queued with top priority */ 847 if (args->sa_privileged) 848 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 849 NULL, RPC_PRIORITY_PRIVILEGED); 850 else 851 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 852 spin_unlock(&tbl->slot_tbl_lock); 853 return -EAGAIN; 854 } 855 EXPORT_SYMBOL_GPL(nfs41_setup_sequence); 856 857 static int nfs4_setup_sequence(const struct nfs_server *server, 858 struct nfs4_sequence_args *args, 859 struct nfs4_sequence_res *res, 860 struct rpc_task *task) 861 { 862 struct nfs4_session *session = nfs4_get_session(server); 863 int ret = 0; 864 865 if (!session) 866 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl, 867 args, res, task); 868 869 dprintk("--> %s clp %p session %p sr_slot %u\n", 870 __func__, session->clp, session, res->sr_slot ? 871 res->sr_slot->slot_nr : NFS4_NO_SLOT); 872 873 ret = nfs41_setup_sequence(session, args, res, task); 874 875 dprintk("<-- %s status=%d\n", __func__, ret); 876 return ret; 877 } 878 879 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 880 { 881 struct nfs4_call_sync_data *data = calldata; 882 struct nfs4_session *session = nfs4_get_session(data->seq_server); 883 884 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 885 886 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task); 887 } 888 889 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 890 { 891 struct nfs4_call_sync_data *data = calldata; 892 893 nfs41_sequence_done(task, data->seq_res); 894 } 895 896 static const struct rpc_call_ops nfs41_call_sync_ops = { 897 .rpc_call_prepare = nfs41_call_sync_prepare, 898 .rpc_call_done = nfs41_call_sync_done, 899 }; 900 901 #else /* !CONFIG_NFS_V4_1 */ 902 903 static int nfs4_setup_sequence(const struct nfs_server *server, 904 struct nfs4_sequence_args *args, 905 struct nfs4_sequence_res *res, 906 struct rpc_task *task) 907 { 908 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl, 909 args, res, task); 910 } 911 912 int nfs4_sequence_done(struct rpc_task *task, 913 struct nfs4_sequence_res *res) 914 { 915 return nfs40_sequence_done(task, res); 916 } 917 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 918 919 #endif /* !CONFIG_NFS_V4_1 */ 920 921 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 922 { 923 struct nfs4_call_sync_data *data = calldata; 924 nfs4_setup_sequence(data->seq_server, 925 data->seq_args, data->seq_res, task); 926 } 927 928 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 929 { 930 struct nfs4_call_sync_data *data = calldata; 931 nfs4_sequence_done(task, data->seq_res); 932 } 933 934 static const struct rpc_call_ops nfs40_call_sync_ops = { 935 .rpc_call_prepare = nfs40_call_sync_prepare, 936 .rpc_call_done = nfs40_call_sync_done, 937 }; 938 939 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 940 struct nfs_server *server, 941 struct rpc_message *msg, 942 struct nfs4_sequence_args *args, 943 struct nfs4_sequence_res *res) 944 { 945 int ret; 946 struct rpc_task *task; 947 struct nfs_client *clp = server->nfs_client; 948 struct nfs4_call_sync_data data = { 949 .seq_server = server, 950 .seq_args = args, 951 .seq_res = res, 952 }; 953 struct rpc_task_setup task_setup = { 954 .rpc_client = clnt, 955 .rpc_message = msg, 956 .callback_ops = clp->cl_mvops->call_sync_ops, 957 .callback_data = &data 958 }; 959 960 task = rpc_run_task(&task_setup); 961 if (IS_ERR(task)) 962 ret = PTR_ERR(task); 963 else { 964 ret = task->tk_status; 965 rpc_put_task(task); 966 } 967 return ret; 968 } 969 970 int nfs4_call_sync(struct rpc_clnt *clnt, 971 struct nfs_server *server, 972 struct rpc_message *msg, 973 struct nfs4_sequence_args *args, 974 struct nfs4_sequence_res *res, 975 int cache_reply) 976 { 977 nfs4_init_sequence(args, res, cache_reply); 978 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 979 } 980 981 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) 982 { 983 struct nfs_inode *nfsi = NFS_I(dir); 984 985 spin_lock(&dir->i_lock); 986 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; 987 if (!cinfo->atomic || cinfo->before != dir->i_version) 988 nfs_force_lookup_revalidate(dir); 989 dir->i_version = cinfo->after; 990 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 991 nfs_fscache_invalidate(dir); 992 spin_unlock(&dir->i_lock); 993 } 994 995 struct nfs4_opendata { 996 struct kref kref; 997 struct nfs_openargs o_arg; 998 struct nfs_openres o_res; 999 struct nfs_open_confirmargs c_arg; 1000 struct nfs_open_confirmres c_res; 1001 struct nfs4_string owner_name; 1002 struct nfs4_string group_name; 1003 struct nfs4_label *a_label; 1004 struct nfs_fattr f_attr; 1005 struct nfs4_label *f_label; 1006 struct dentry *dir; 1007 struct dentry *dentry; 1008 struct nfs4_state_owner *owner; 1009 struct nfs4_state *state; 1010 struct iattr attrs; 1011 unsigned long timestamp; 1012 unsigned int rpc_done : 1; 1013 unsigned int file_created : 1; 1014 unsigned int is_recover : 1; 1015 int rpc_status; 1016 int cancelled; 1017 }; 1018 1019 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1020 int err, struct nfs4_exception *exception) 1021 { 1022 if (err != -EINVAL) 1023 return false; 1024 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1025 return false; 1026 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1027 exception->retry = 1; 1028 return true; 1029 } 1030 1031 static u32 1032 nfs4_map_atomic_open_share(struct nfs_server *server, 1033 fmode_t fmode, int openflags) 1034 { 1035 u32 res = 0; 1036 1037 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1038 case FMODE_READ: 1039 res = NFS4_SHARE_ACCESS_READ; 1040 break; 1041 case FMODE_WRITE: 1042 res = NFS4_SHARE_ACCESS_WRITE; 1043 break; 1044 case FMODE_READ|FMODE_WRITE: 1045 res = NFS4_SHARE_ACCESS_BOTH; 1046 } 1047 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1048 goto out; 1049 /* Want no delegation if we're using O_DIRECT */ 1050 if (openflags & O_DIRECT) 1051 res |= NFS4_SHARE_WANT_NO_DELEG; 1052 out: 1053 return res; 1054 } 1055 1056 static enum open_claim_type4 1057 nfs4_map_atomic_open_claim(struct nfs_server *server, 1058 enum open_claim_type4 claim) 1059 { 1060 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1061 return claim; 1062 switch (claim) { 1063 default: 1064 return claim; 1065 case NFS4_OPEN_CLAIM_FH: 1066 return NFS4_OPEN_CLAIM_NULL; 1067 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1068 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1069 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1070 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1071 } 1072 } 1073 1074 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1075 { 1076 p->o_res.f_attr = &p->f_attr; 1077 p->o_res.f_label = p->f_label; 1078 p->o_res.seqid = p->o_arg.seqid; 1079 p->c_res.seqid = p->c_arg.seqid; 1080 p->o_res.server = p->o_arg.server; 1081 p->o_res.access_request = p->o_arg.access; 1082 nfs_fattr_init(&p->f_attr); 1083 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1084 } 1085 1086 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1087 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1088 const struct iattr *attrs, 1089 struct nfs4_label *label, 1090 enum open_claim_type4 claim, 1091 gfp_t gfp_mask) 1092 { 1093 struct dentry *parent = dget_parent(dentry); 1094 struct inode *dir = d_inode(parent); 1095 struct nfs_server *server = NFS_SERVER(dir); 1096 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1097 struct nfs4_opendata *p; 1098 1099 p = kzalloc(sizeof(*p), gfp_mask); 1100 if (p == NULL) 1101 goto err; 1102 1103 p->f_label = nfs4_label_alloc(server, gfp_mask); 1104 if (IS_ERR(p->f_label)) 1105 goto err_free_p; 1106 1107 p->a_label = nfs4_label_alloc(server, gfp_mask); 1108 if (IS_ERR(p->a_label)) 1109 goto err_free_f; 1110 1111 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1112 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1113 if (IS_ERR(p->o_arg.seqid)) 1114 goto err_free_label; 1115 nfs_sb_active(dentry->d_sb); 1116 p->dentry = dget(dentry); 1117 p->dir = parent; 1118 p->owner = sp; 1119 atomic_inc(&sp->so_count); 1120 p->o_arg.open_flags = flags; 1121 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1122 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1123 fmode, flags); 1124 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS 1125 * will return permission denied for all bits until close */ 1126 if (!(flags & O_EXCL)) { 1127 /* ask server to check for all possible rights as results 1128 * are cached */ 1129 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | 1130 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE; 1131 } 1132 p->o_arg.clientid = server->nfs_client->cl_clientid; 1133 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1134 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1135 p->o_arg.name = &dentry->d_name; 1136 p->o_arg.server = server; 1137 p->o_arg.bitmask = nfs4_bitmask(server, label); 1138 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1139 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1140 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1141 switch (p->o_arg.claim) { 1142 case NFS4_OPEN_CLAIM_NULL: 1143 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1144 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1145 p->o_arg.fh = NFS_FH(dir); 1146 break; 1147 case NFS4_OPEN_CLAIM_PREVIOUS: 1148 case NFS4_OPEN_CLAIM_FH: 1149 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1150 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1151 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1152 } 1153 if (attrs != NULL && attrs->ia_valid != 0) { 1154 __u32 verf[2]; 1155 1156 p->o_arg.u.attrs = &p->attrs; 1157 memcpy(&p->attrs, attrs, sizeof(p->attrs)); 1158 1159 verf[0] = jiffies; 1160 verf[1] = current->pid; 1161 memcpy(p->o_arg.u.verifier.data, verf, 1162 sizeof(p->o_arg.u.verifier.data)); 1163 } 1164 p->c_arg.fh = &p->o_res.fh; 1165 p->c_arg.stateid = &p->o_res.stateid; 1166 p->c_arg.seqid = p->o_arg.seqid; 1167 nfs4_init_opendata_res(p); 1168 kref_init(&p->kref); 1169 return p; 1170 1171 err_free_label: 1172 nfs4_label_free(p->a_label); 1173 err_free_f: 1174 nfs4_label_free(p->f_label); 1175 err_free_p: 1176 kfree(p); 1177 err: 1178 dput(parent); 1179 return NULL; 1180 } 1181 1182 static void nfs4_opendata_free(struct kref *kref) 1183 { 1184 struct nfs4_opendata *p = container_of(kref, 1185 struct nfs4_opendata, kref); 1186 struct super_block *sb = p->dentry->d_sb; 1187 1188 nfs_free_seqid(p->o_arg.seqid); 1189 if (p->state != NULL) 1190 nfs4_put_open_state(p->state); 1191 nfs4_put_state_owner(p->owner); 1192 1193 nfs4_label_free(p->a_label); 1194 nfs4_label_free(p->f_label); 1195 1196 dput(p->dir); 1197 dput(p->dentry); 1198 nfs_sb_deactive(sb); 1199 nfs_fattr_free_names(&p->f_attr); 1200 kfree(p->f_attr.mdsthreshold); 1201 kfree(p); 1202 } 1203 1204 static void nfs4_opendata_put(struct nfs4_opendata *p) 1205 { 1206 if (p != NULL) 1207 kref_put(&p->kref, nfs4_opendata_free); 1208 } 1209 1210 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) 1211 { 1212 int ret; 1213 1214 ret = rpc_wait_for_completion_task(task); 1215 return ret; 1216 } 1217 1218 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1219 fmode_t fmode) 1220 { 1221 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1222 case FMODE_READ|FMODE_WRITE: 1223 return state->n_rdwr != 0; 1224 case FMODE_WRITE: 1225 return state->n_wronly != 0; 1226 case FMODE_READ: 1227 return state->n_rdonly != 0; 1228 } 1229 WARN_ON_ONCE(1); 1230 return false; 1231 } 1232 1233 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) 1234 { 1235 int ret = 0; 1236 1237 if (open_mode & (O_EXCL|O_TRUNC)) 1238 goto out; 1239 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1240 case FMODE_READ: 1241 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1242 && state->n_rdonly != 0; 1243 break; 1244 case FMODE_WRITE: 1245 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1246 && state->n_wronly != 0; 1247 break; 1248 case FMODE_READ|FMODE_WRITE: 1249 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1250 && state->n_rdwr != 0; 1251 } 1252 out: 1253 return ret; 1254 } 1255 1256 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1257 enum open_claim_type4 claim) 1258 { 1259 if (delegation == NULL) 1260 return 0; 1261 if ((delegation->type & fmode) != fmode) 1262 return 0; 1263 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) 1264 return 0; 1265 switch (claim) { 1266 case NFS4_OPEN_CLAIM_NULL: 1267 case NFS4_OPEN_CLAIM_FH: 1268 break; 1269 case NFS4_OPEN_CLAIM_PREVIOUS: 1270 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1271 break; 1272 default: 1273 return 0; 1274 } 1275 nfs_mark_delegation_referenced(delegation); 1276 return 1; 1277 } 1278 1279 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1280 { 1281 switch (fmode) { 1282 case FMODE_WRITE: 1283 state->n_wronly++; 1284 break; 1285 case FMODE_READ: 1286 state->n_rdonly++; 1287 break; 1288 case FMODE_READ|FMODE_WRITE: 1289 state->n_rdwr++; 1290 } 1291 nfs4_state_set_mode_locked(state, state->state | fmode); 1292 } 1293 1294 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1295 { 1296 struct nfs_client *clp = state->owner->so_server->nfs_client; 1297 bool need_recover = false; 1298 1299 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1300 need_recover = true; 1301 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1302 need_recover = true; 1303 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1304 need_recover = true; 1305 if (need_recover) 1306 nfs4_state_mark_reclaim_nograce(clp, state); 1307 } 1308 1309 static bool nfs_need_update_open_stateid(struct nfs4_state *state, 1310 nfs4_stateid *stateid) 1311 { 1312 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0) 1313 return true; 1314 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1315 nfs_test_and_clear_all_open_stateid(state); 1316 return true; 1317 } 1318 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) 1319 return true; 1320 return false; 1321 } 1322 1323 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1324 { 1325 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1326 return; 1327 if (state->n_wronly) 1328 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1329 if (state->n_rdonly) 1330 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1331 if (state->n_rdwr) 1332 set_bit(NFS_O_RDWR_STATE, &state->flags); 1333 set_bit(NFS_OPEN_STATE, &state->flags); 1334 } 1335 1336 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1337 nfs4_stateid *arg_stateid, 1338 nfs4_stateid *stateid, fmode_t fmode) 1339 { 1340 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1341 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1342 case FMODE_WRITE: 1343 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1344 break; 1345 case FMODE_READ: 1346 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1347 break; 1348 case 0: 1349 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1350 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1351 clear_bit(NFS_OPEN_STATE, &state->flags); 1352 } 1353 if (stateid == NULL) 1354 return; 1355 /* Handle races with OPEN */ 1356 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) || 1357 (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1358 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) { 1359 nfs_resync_open_stateid_locked(state); 1360 return; 1361 } 1362 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1363 nfs4_stateid_copy(&state->stateid, stateid); 1364 nfs4_stateid_copy(&state->open_stateid, stateid); 1365 } 1366 1367 static void nfs_clear_open_stateid(struct nfs4_state *state, 1368 nfs4_stateid *arg_stateid, 1369 nfs4_stateid *stateid, fmode_t fmode) 1370 { 1371 write_seqlock(&state->seqlock); 1372 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode); 1373 write_sequnlock(&state->seqlock); 1374 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1375 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1376 } 1377 1378 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) 1379 { 1380 switch (fmode) { 1381 case FMODE_READ: 1382 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1383 break; 1384 case FMODE_WRITE: 1385 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1386 break; 1387 case FMODE_READ|FMODE_WRITE: 1388 set_bit(NFS_O_RDWR_STATE, &state->flags); 1389 } 1390 if (!nfs_need_update_open_stateid(state, stateid)) 1391 return; 1392 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1393 nfs4_stateid_copy(&state->stateid, stateid); 1394 nfs4_stateid_copy(&state->open_stateid, stateid); 1395 } 1396 1397 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) 1398 { 1399 /* 1400 * Protect the call to nfs4_state_set_mode_locked and 1401 * serialise the stateid update 1402 */ 1403 spin_lock(&state->owner->so_lock); 1404 write_seqlock(&state->seqlock); 1405 if (deleg_stateid != NULL) { 1406 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1407 set_bit(NFS_DELEGATED_STATE, &state->flags); 1408 } 1409 if (open_stateid != NULL) 1410 nfs_set_open_stateid_locked(state, open_stateid, fmode); 1411 write_sequnlock(&state->seqlock); 1412 update_open_stateflags(state, fmode); 1413 spin_unlock(&state->owner->so_lock); 1414 } 1415 1416 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) 1417 { 1418 struct nfs_inode *nfsi = NFS_I(state->inode); 1419 struct nfs_delegation *deleg_cur; 1420 int ret = 0; 1421 1422 fmode &= (FMODE_READ|FMODE_WRITE); 1423 1424 rcu_read_lock(); 1425 deleg_cur = rcu_dereference(nfsi->delegation); 1426 if (deleg_cur == NULL) 1427 goto no_delegation; 1428 1429 spin_lock(&deleg_cur->lock); 1430 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1431 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1432 (deleg_cur->type & fmode) != fmode) 1433 goto no_delegation_unlock; 1434 1435 if (delegation == NULL) 1436 delegation = &deleg_cur->stateid; 1437 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation)) 1438 goto no_delegation_unlock; 1439 1440 nfs_mark_delegation_referenced(deleg_cur); 1441 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); 1442 ret = 1; 1443 no_delegation_unlock: 1444 spin_unlock(&deleg_cur->lock); 1445 no_delegation: 1446 rcu_read_unlock(); 1447 1448 if (!ret && open_stateid != NULL) { 1449 __update_open_stateid(state, open_stateid, NULL, fmode); 1450 ret = 1; 1451 } 1452 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1453 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1454 1455 return ret; 1456 } 1457 1458 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1459 const nfs4_stateid *stateid) 1460 { 1461 struct nfs4_state *state = lsp->ls_state; 1462 bool ret = false; 1463 1464 spin_lock(&state->state_lock); 1465 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1466 goto out_noupdate; 1467 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1468 goto out_noupdate; 1469 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1470 ret = true; 1471 out_noupdate: 1472 spin_unlock(&state->state_lock); 1473 return ret; 1474 } 1475 1476 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1477 { 1478 struct nfs_delegation *delegation; 1479 1480 rcu_read_lock(); 1481 delegation = rcu_dereference(NFS_I(inode)->delegation); 1482 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1483 rcu_read_unlock(); 1484 return; 1485 } 1486 rcu_read_unlock(); 1487 nfs4_inode_return_delegation(inode); 1488 } 1489 1490 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1491 { 1492 struct nfs4_state *state = opendata->state; 1493 struct nfs_inode *nfsi = NFS_I(state->inode); 1494 struct nfs_delegation *delegation; 1495 int open_mode = opendata->o_arg.open_flags; 1496 fmode_t fmode = opendata->o_arg.fmode; 1497 enum open_claim_type4 claim = opendata->o_arg.claim; 1498 nfs4_stateid stateid; 1499 int ret = -EAGAIN; 1500 1501 for (;;) { 1502 spin_lock(&state->owner->so_lock); 1503 if (can_open_cached(state, fmode, open_mode)) { 1504 update_open_stateflags(state, fmode); 1505 spin_unlock(&state->owner->so_lock); 1506 goto out_return_state; 1507 } 1508 spin_unlock(&state->owner->so_lock); 1509 rcu_read_lock(); 1510 delegation = rcu_dereference(nfsi->delegation); 1511 if (!can_open_delegated(delegation, fmode, claim)) { 1512 rcu_read_unlock(); 1513 break; 1514 } 1515 /* Save the delegation */ 1516 nfs4_stateid_copy(&stateid, &delegation->stateid); 1517 rcu_read_unlock(); 1518 nfs_release_seqid(opendata->o_arg.seqid); 1519 if (!opendata->is_recover) { 1520 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1521 if (ret != 0) 1522 goto out; 1523 } 1524 ret = -EAGAIN; 1525 1526 /* Try to update the stateid using the delegation */ 1527 if (update_open_stateid(state, NULL, &stateid, fmode)) 1528 goto out_return_state; 1529 } 1530 out: 1531 return ERR_PTR(ret); 1532 out_return_state: 1533 atomic_inc(&state->count); 1534 return state; 1535 } 1536 1537 static void 1538 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1539 { 1540 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1541 struct nfs_delegation *delegation; 1542 int delegation_flags = 0; 1543 1544 rcu_read_lock(); 1545 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1546 if (delegation) 1547 delegation_flags = delegation->flags; 1548 rcu_read_unlock(); 1549 switch (data->o_arg.claim) { 1550 default: 1551 break; 1552 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1553 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1554 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1555 "returning a delegation for " 1556 "OPEN(CLAIM_DELEGATE_CUR)\n", 1557 clp->cl_hostname); 1558 return; 1559 } 1560 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1561 nfs_inode_set_delegation(state->inode, 1562 data->owner->so_cred, 1563 &data->o_res); 1564 else 1565 nfs_inode_reclaim_delegation(state->inode, 1566 data->owner->so_cred, 1567 &data->o_res); 1568 } 1569 1570 /* 1571 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1572 * and update the nfs4_state. 1573 */ 1574 static struct nfs4_state * 1575 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1576 { 1577 struct inode *inode = data->state->inode; 1578 struct nfs4_state *state = data->state; 1579 int ret; 1580 1581 if (!data->rpc_done) { 1582 if (data->rpc_status) { 1583 ret = data->rpc_status; 1584 goto err; 1585 } 1586 /* cached opens have already been processed */ 1587 goto update; 1588 } 1589 1590 ret = nfs_refresh_inode(inode, &data->f_attr); 1591 if (ret) 1592 goto err; 1593 1594 if (data->o_res.delegation_type != 0) 1595 nfs4_opendata_check_deleg(data, state); 1596 update: 1597 update_open_stateid(state, &data->o_res.stateid, NULL, 1598 data->o_arg.fmode); 1599 atomic_inc(&state->count); 1600 1601 return state; 1602 err: 1603 return ERR_PTR(ret); 1604 1605 } 1606 1607 static struct nfs4_state * 1608 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1609 { 1610 struct inode *inode; 1611 struct nfs4_state *state = NULL; 1612 int ret; 1613 1614 if (!data->rpc_done) { 1615 state = nfs4_try_open_cached(data); 1616 trace_nfs4_cached_open(data->state); 1617 goto out; 1618 } 1619 1620 ret = -EAGAIN; 1621 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 1622 goto err; 1623 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label); 1624 ret = PTR_ERR(inode); 1625 if (IS_ERR(inode)) 1626 goto err; 1627 ret = -ENOMEM; 1628 state = nfs4_get_open_state(inode, data->owner); 1629 if (state == NULL) 1630 goto err_put_inode; 1631 if (data->o_res.delegation_type != 0) 1632 nfs4_opendata_check_deleg(data, state); 1633 update_open_stateid(state, &data->o_res.stateid, NULL, 1634 data->o_arg.fmode); 1635 iput(inode); 1636 out: 1637 nfs_release_seqid(data->o_arg.seqid); 1638 return state; 1639 err_put_inode: 1640 iput(inode); 1641 err: 1642 return ERR_PTR(ret); 1643 } 1644 1645 static struct nfs4_state * 1646 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1647 { 1648 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 1649 return _nfs4_opendata_reclaim_to_nfs4_state(data); 1650 return _nfs4_opendata_to_nfs4_state(data); 1651 } 1652 1653 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) 1654 { 1655 struct nfs_inode *nfsi = NFS_I(state->inode); 1656 struct nfs_open_context *ctx; 1657 1658 spin_lock(&state->inode->i_lock); 1659 list_for_each_entry(ctx, &nfsi->open_files, list) { 1660 if (ctx->state != state) 1661 continue; 1662 get_nfs_open_context(ctx); 1663 spin_unlock(&state->inode->i_lock); 1664 return ctx; 1665 } 1666 spin_unlock(&state->inode->i_lock); 1667 return ERR_PTR(-ENOENT); 1668 } 1669 1670 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 1671 struct nfs4_state *state, enum open_claim_type4 claim) 1672 { 1673 struct nfs4_opendata *opendata; 1674 1675 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 1676 NULL, NULL, claim, GFP_NOFS); 1677 if (opendata == NULL) 1678 return ERR_PTR(-ENOMEM); 1679 opendata->state = state; 1680 atomic_inc(&state->count); 1681 return opendata; 1682 } 1683 1684 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 1685 fmode_t fmode) 1686 { 1687 struct nfs4_state *newstate; 1688 int ret; 1689 1690 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 1691 return 0; 1692 opendata->o_arg.open_flags = 0; 1693 opendata->o_arg.fmode = fmode; 1694 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 1695 NFS_SB(opendata->dentry->d_sb), 1696 fmode, 0); 1697 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 1698 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 1699 nfs4_init_opendata_res(opendata); 1700 ret = _nfs4_recover_proc_open(opendata); 1701 if (ret != 0) 1702 return ret; 1703 newstate = nfs4_opendata_to_nfs4_state(opendata); 1704 if (IS_ERR(newstate)) 1705 return PTR_ERR(newstate); 1706 if (newstate != opendata->state) 1707 ret = -ESTALE; 1708 nfs4_close_state(newstate, fmode); 1709 return ret; 1710 } 1711 1712 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 1713 { 1714 int ret; 1715 1716 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */ 1717 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1718 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1719 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1720 /* memory barrier prior to reading state->n_* */ 1721 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1722 clear_bit(NFS_OPEN_STATE, &state->flags); 1723 smp_rmb(); 1724 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 1725 if (ret != 0) 1726 return ret; 1727 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 1728 if (ret != 0) 1729 return ret; 1730 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 1731 if (ret != 0) 1732 return ret; 1733 /* 1734 * We may have performed cached opens for all three recoveries. 1735 * Check if we need to update the current stateid. 1736 */ 1737 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 1738 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 1739 write_seqlock(&state->seqlock); 1740 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1741 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1742 write_sequnlock(&state->seqlock); 1743 } 1744 return 0; 1745 } 1746 1747 /* 1748 * OPEN_RECLAIM: 1749 * reclaim state on the server after a reboot. 1750 */ 1751 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 1752 { 1753 struct nfs_delegation *delegation; 1754 struct nfs4_opendata *opendata; 1755 fmode_t delegation_type = 0; 1756 int status; 1757 1758 opendata = nfs4_open_recoverdata_alloc(ctx, state, 1759 NFS4_OPEN_CLAIM_PREVIOUS); 1760 if (IS_ERR(opendata)) 1761 return PTR_ERR(opendata); 1762 rcu_read_lock(); 1763 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1764 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 1765 delegation_type = delegation->type; 1766 rcu_read_unlock(); 1767 opendata->o_arg.u.delegation_type = delegation_type; 1768 status = nfs4_open_recover(opendata, state); 1769 nfs4_opendata_put(opendata); 1770 return status; 1771 } 1772 1773 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 1774 { 1775 struct nfs_server *server = NFS_SERVER(state->inode); 1776 struct nfs4_exception exception = { }; 1777 int err; 1778 do { 1779 err = _nfs4_do_open_reclaim(ctx, state); 1780 trace_nfs4_open_reclaim(ctx, 0, err); 1781 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 1782 continue; 1783 if (err != -NFS4ERR_DELAY) 1784 break; 1785 nfs4_handle_exception(server, err, &exception); 1786 } while (exception.retry); 1787 return err; 1788 } 1789 1790 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 1791 { 1792 struct nfs_open_context *ctx; 1793 int ret; 1794 1795 ctx = nfs4_state_find_open_context(state); 1796 if (IS_ERR(ctx)) 1797 return -EAGAIN; 1798 ret = nfs4_do_open_reclaim(ctx, state); 1799 put_nfs_open_context(ctx); 1800 return ret; 1801 } 1802 1803 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err) 1804 { 1805 switch (err) { 1806 default: 1807 printk(KERN_ERR "NFS: %s: unhandled error " 1808 "%d.\n", __func__, err); 1809 case 0: 1810 case -ENOENT: 1811 case -EAGAIN: 1812 case -ESTALE: 1813 break; 1814 case -NFS4ERR_BADSESSION: 1815 case -NFS4ERR_BADSLOT: 1816 case -NFS4ERR_BAD_HIGH_SLOT: 1817 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 1818 case -NFS4ERR_DEADSESSION: 1819 set_bit(NFS_DELEGATED_STATE, &state->flags); 1820 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); 1821 return -EAGAIN; 1822 case -NFS4ERR_STALE_CLIENTID: 1823 case -NFS4ERR_STALE_STATEID: 1824 set_bit(NFS_DELEGATED_STATE, &state->flags); 1825 case -NFS4ERR_EXPIRED: 1826 /* Don't recall a delegation if it was lost */ 1827 nfs4_schedule_lease_recovery(server->nfs_client); 1828 return -EAGAIN; 1829 case -NFS4ERR_MOVED: 1830 nfs4_schedule_migration_recovery(server); 1831 return -EAGAIN; 1832 case -NFS4ERR_LEASE_MOVED: 1833 nfs4_schedule_lease_moved_recovery(server->nfs_client); 1834 return -EAGAIN; 1835 case -NFS4ERR_DELEG_REVOKED: 1836 case -NFS4ERR_ADMIN_REVOKED: 1837 case -NFS4ERR_BAD_STATEID: 1838 case -NFS4ERR_OPENMODE: 1839 nfs_inode_find_state_and_recover(state->inode, 1840 stateid); 1841 nfs4_schedule_stateid_recovery(server, state); 1842 return -EAGAIN; 1843 case -NFS4ERR_DELAY: 1844 case -NFS4ERR_GRACE: 1845 set_bit(NFS_DELEGATED_STATE, &state->flags); 1846 ssleep(1); 1847 return -EAGAIN; 1848 case -ENOMEM: 1849 case -NFS4ERR_DENIED: 1850 /* kill_proc(fl->fl_pid, SIGLOST, 1); */ 1851 return 0; 1852 } 1853 return err; 1854 } 1855 1856 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 1857 struct nfs4_state *state, const nfs4_stateid *stateid, 1858 fmode_t type) 1859 { 1860 struct nfs_server *server = NFS_SERVER(state->inode); 1861 struct nfs4_opendata *opendata; 1862 int err = 0; 1863 1864 opendata = nfs4_open_recoverdata_alloc(ctx, state, 1865 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 1866 if (IS_ERR(opendata)) 1867 return PTR_ERR(opendata); 1868 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 1869 write_seqlock(&state->seqlock); 1870 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1871 write_sequnlock(&state->seqlock); 1872 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1873 switch (type & (FMODE_READ|FMODE_WRITE)) { 1874 case FMODE_READ|FMODE_WRITE: 1875 case FMODE_WRITE: 1876 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 1877 if (err) 1878 break; 1879 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 1880 if (err) 1881 break; 1882 case FMODE_READ: 1883 err = nfs4_open_recover_helper(opendata, FMODE_READ); 1884 } 1885 nfs4_opendata_put(opendata); 1886 return nfs4_handle_delegation_recall_error(server, state, stateid, err); 1887 } 1888 1889 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 1890 { 1891 struct nfs4_opendata *data = calldata; 1892 1893 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl, 1894 &data->c_arg.seq_args, &data->c_res.seq_res, task); 1895 } 1896 1897 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 1898 { 1899 struct nfs4_opendata *data = calldata; 1900 1901 nfs40_sequence_done(task, &data->c_res.seq_res); 1902 1903 data->rpc_status = task->tk_status; 1904 if (data->rpc_status == 0) { 1905 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 1906 nfs_confirm_seqid(&data->owner->so_seqid, 0); 1907 renew_lease(data->o_res.server, data->timestamp); 1908 data->rpc_done = 1; 1909 } 1910 } 1911 1912 static void nfs4_open_confirm_release(void *calldata) 1913 { 1914 struct nfs4_opendata *data = calldata; 1915 struct nfs4_state *state = NULL; 1916 1917 /* If this request hasn't been cancelled, do nothing */ 1918 if (data->cancelled == 0) 1919 goto out_free; 1920 /* In case of error, no cleanup! */ 1921 if (!data->rpc_done) 1922 goto out_free; 1923 state = nfs4_opendata_to_nfs4_state(data); 1924 if (!IS_ERR(state)) 1925 nfs4_close_state(state, data->o_arg.fmode); 1926 out_free: 1927 nfs4_opendata_put(data); 1928 } 1929 1930 static const struct rpc_call_ops nfs4_open_confirm_ops = { 1931 .rpc_call_prepare = nfs4_open_confirm_prepare, 1932 .rpc_call_done = nfs4_open_confirm_done, 1933 .rpc_release = nfs4_open_confirm_release, 1934 }; 1935 1936 /* 1937 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 1938 */ 1939 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 1940 { 1941 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 1942 struct rpc_task *task; 1943 struct rpc_message msg = { 1944 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 1945 .rpc_argp = &data->c_arg, 1946 .rpc_resp = &data->c_res, 1947 .rpc_cred = data->owner->so_cred, 1948 }; 1949 struct rpc_task_setup task_setup_data = { 1950 .rpc_client = server->client, 1951 .rpc_message = &msg, 1952 .callback_ops = &nfs4_open_confirm_ops, 1953 .callback_data = data, 1954 .workqueue = nfsiod_workqueue, 1955 .flags = RPC_TASK_ASYNC, 1956 }; 1957 int status; 1958 1959 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1); 1960 kref_get(&data->kref); 1961 data->rpc_done = 0; 1962 data->rpc_status = 0; 1963 data->timestamp = jiffies; 1964 if (data->is_recover) 1965 nfs4_set_sequence_privileged(&data->c_arg.seq_args); 1966 task = rpc_run_task(&task_setup_data); 1967 if (IS_ERR(task)) 1968 return PTR_ERR(task); 1969 status = nfs4_wait_for_completion_rpc_task(task); 1970 if (status != 0) { 1971 data->cancelled = 1; 1972 smp_wmb(); 1973 } else 1974 status = data->rpc_status; 1975 rpc_put_task(task); 1976 return status; 1977 } 1978 1979 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 1980 { 1981 struct nfs4_opendata *data = calldata; 1982 struct nfs4_state_owner *sp = data->owner; 1983 struct nfs_client *clp = sp->so_server->nfs_client; 1984 enum open_claim_type4 claim = data->o_arg.claim; 1985 1986 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 1987 goto out_wait; 1988 /* 1989 * Check if we still need to send an OPEN call, or if we can use 1990 * a delegation instead. 1991 */ 1992 if (data->state != NULL) { 1993 struct nfs_delegation *delegation; 1994 1995 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) 1996 goto out_no_action; 1997 rcu_read_lock(); 1998 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); 1999 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2000 goto unlock_no_action; 2001 rcu_read_unlock(); 2002 } 2003 /* Update client id. */ 2004 data->o_arg.clientid = clp->cl_clientid; 2005 switch (claim) { 2006 default: 2007 break; 2008 case NFS4_OPEN_CLAIM_PREVIOUS: 2009 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2010 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2011 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2012 case NFS4_OPEN_CLAIM_FH: 2013 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2014 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); 2015 } 2016 data->timestamp = jiffies; 2017 if (nfs4_setup_sequence(data->o_arg.server, 2018 &data->o_arg.seq_args, 2019 &data->o_res.seq_res, 2020 task) != 0) 2021 nfs_release_seqid(data->o_arg.seqid); 2022 2023 /* Set the create mode (note dependency on the session type) */ 2024 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2025 if (data->o_arg.open_flags & O_EXCL) { 2026 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2027 if (nfs4_has_persistent_session(clp)) 2028 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2029 else if (clp->cl_mvops->minor_version > 0) 2030 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2031 } 2032 return; 2033 unlock_no_action: 2034 trace_nfs4_cached_open(data->state); 2035 rcu_read_unlock(); 2036 out_no_action: 2037 task->tk_action = NULL; 2038 out_wait: 2039 nfs4_sequence_done(task, &data->o_res.seq_res); 2040 } 2041 2042 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2043 { 2044 struct nfs4_opendata *data = calldata; 2045 2046 data->rpc_status = task->tk_status; 2047 2048 if (!nfs4_sequence_done(task, &data->o_res.seq_res)) 2049 return; 2050 2051 if (task->tk_status == 0) { 2052 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2053 switch (data->o_res.f_attr->mode & S_IFMT) { 2054 case S_IFREG: 2055 break; 2056 case S_IFLNK: 2057 data->rpc_status = -ELOOP; 2058 break; 2059 case S_IFDIR: 2060 data->rpc_status = -EISDIR; 2061 break; 2062 default: 2063 data->rpc_status = -ENOTDIR; 2064 } 2065 } 2066 renew_lease(data->o_res.server, data->timestamp); 2067 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2068 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2069 } 2070 data->rpc_done = 1; 2071 } 2072 2073 static void nfs4_open_release(void *calldata) 2074 { 2075 struct nfs4_opendata *data = calldata; 2076 struct nfs4_state *state = NULL; 2077 2078 /* If this request hasn't been cancelled, do nothing */ 2079 if (data->cancelled == 0) 2080 goto out_free; 2081 /* In case of error, no cleanup! */ 2082 if (data->rpc_status != 0 || !data->rpc_done) 2083 goto out_free; 2084 /* In case we need an open_confirm, no cleanup! */ 2085 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2086 goto out_free; 2087 state = nfs4_opendata_to_nfs4_state(data); 2088 if (!IS_ERR(state)) 2089 nfs4_close_state(state, data->o_arg.fmode); 2090 out_free: 2091 nfs4_opendata_put(data); 2092 } 2093 2094 static const struct rpc_call_ops nfs4_open_ops = { 2095 .rpc_call_prepare = nfs4_open_prepare, 2096 .rpc_call_done = nfs4_open_done, 2097 .rpc_release = nfs4_open_release, 2098 }; 2099 2100 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) 2101 { 2102 struct inode *dir = d_inode(data->dir); 2103 struct nfs_server *server = NFS_SERVER(dir); 2104 struct nfs_openargs *o_arg = &data->o_arg; 2105 struct nfs_openres *o_res = &data->o_res; 2106 struct rpc_task *task; 2107 struct rpc_message msg = { 2108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2109 .rpc_argp = o_arg, 2110 .rpc_resp = o_res, 2111 .rpc_cred = data->owner->so_cred, 2112 }; 2113 struct rpc_task_setup task_setup_data = { 2114 .rpc_client = server->client, 2115 .rpc_message = &msg, 2116 .callback_ops = &nfs4_open_ops, 2117 .callback_data = data, 2118 .workqueue = nfsiod_workqueue, 2119 .flags = RPC_TASK_ASYNC, 2120 }; 2121 int status; 2122 2123 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1); 2124 kref_get(&data->kref); 2125 data->rpc_done = 0; 2126 data->rpc_status = 0; 2127 data->cancelled = 0; 2128 data->is_recover = 0; 2129 if (isrecover) { 2130 nfs4_set_sequence_privileged(&o_arg->seq_args); 2131 data->is_recover = 1; 2132 } 2133 task = rpc_run_task(&task_setup_data); 2134 if (IS_ERR(task)) 2135 return PTR_ERR(task); 2136 status = nfs4_wait_for_completion_rpc_task(task); 2137 if (status != 0) { 2138 data->cancelled = 1; 2139 smp_wmb(); 2140 } else 2141 status = data->rpc_status; 2142 rpc_put_task(task); 2143 2144 return status; 2145 } 2146 2147 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2148 { 2149 struct inode *dir = d_inode(data->dir); 2150 struct nfs_openres *o_res = &data->o_res; 2151 int status; 2152 2153 status = nfs4_run_open_task(data, 1); 2154 if (status != 0 || !data->rpc_done) 2155 return status; 2156 2157 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2158 2159 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2160 status = _nfs4_proc_open_confirm(data); 2161 if (status != 0) 2162 return status; 2163 } 2164 2165 return status; 2166 } 2167 2168 /* 2169 * Additional permission checks in order to distinguish between an 2170 * open for read, and an open for execute. This works around the 2171 * fact that NFSv4 OPEN treats read and execute permissions as being 2172 * the same. 2173 * Note that in the non-execute case, we want to turn off permission 2174 * checking if we just created a new file (POSIX open() semantics). 2175 */ 2176 static int nfs4_opendata_access(struct rpc_cred *cred, 2177 struct nfs4_opendata *opendata, 2178 struct nfs4_state *state, fmode_t fmode, 2179 int openflags) 2180 { 2181 struct nfs_access_entry cache; 2182 u32 mask; 2183 2184 /* access call failed or for some reason the server doesn't 2185 * support any access modes -- defer access call until later */ 2186 if (opendata->o_res.access_supported == 0) 2187 return 0; 2188 2189 mask = 0; 2190 /* 2191 * Use openflags to check for exec, because fmode won't 2192 * always have FMODE_EXEC set when file open for exec. 2193 */ 2194 if (openflags & __FMODE_EXEC) { 2195 /* ONLY check for exec rights */ 2196 mask = MAY_EXEC; 2197 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2198 mask = MAY_READ; 2199 2200 cache.cred = cred; 2201 cache.jiffies = jiffies; 2202 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2203 nfs_access_add_cache(state->inode, &cache); 2204 2205 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0) 2206 return 0; 2207 2208 /* even though OPEN succeeded, access is denied. Close the file */ 2209 nfs4_close_state(state, fmode); 2210 return -EACCES; 2211 } 2212 2213 /* 2214 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2215 */ 2216 static int _nfs4_proc_open(struct nfs4_opendata *data) 2217 { 2218 struct inode *dir = d_inode(data->dir); 2219 struct nfs_server *server = NFS_SERVER(dir); 2220 struct nfs_openargs *o_arg = &data->o_arg; 2221 struct nfs_openres *o_res = &data->o_res; 2222 int status; 2223 2224 status = nfs4_run_open_task(data, 0); 2225 if (!data->rpc_done) 2226 return status; 2227 if (status != 0) { 2228 if (status == -NFS4ERR_BADNAME && 2229 !(o_arg->open_flags & O_CREAT)) 2230 return -ENOENT; 2231 return status; 2232 } 2233 2234 nfs_fattr_map_and_free_names(server, &data->f_attr); 2235 2236 if (o_arg->open_flags & O_CREAT) { 2237 update_changeattr(dir, &o_res->cinfo); 2238 if (o_arg->open_flags & O_EXCL) 2239 data->file_created = 1; 2240 else if (o_res->cinfo.before != o_res->cinfo.after) 2241 data->file_created = 1; 2242 } 2243 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2244 server->caps &= ~NFS_CAP_POSIX_LOCK; 2245 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2246 status = _nfs4_proc_open_confirm(data); 2247 if (status != 0) 2248 return status; 2249 } 2250 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) 2251 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label); 2252 return 0; 2253 } 2254 2255 static int nfs4_recover_expired_lease(struct nfs_server *server) 2256 { 2257 return nfs4_client_recover_expired_lease(server->nfs_client); 2258 } 2259 2260 /* 2261 * OPEN_EXPIRED: 2262 * reclaim state on the server after a network partition. 2263 * Assumes caller holds the appropriate lock 2264 */ 2265 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2266 { 2267 struct nfs4_opendata *opendata; 2268 int ret; 2269 2270 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2271 NFS4_OPEN_CLAIM_FH); 2272 if (IS_ERR(opendata)) 2273 return PTR_ERR(opendata); 2274 ret = nfs4_open_recover(opendata, state); 2275 if (ret == -ESTALE) 2276 d_drop(ctx->dentry); 2277 nfs4_opendata_put(opendata); 2278 return ret; 2279 } 2280 2281 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2282 { 2283 struct nfs_server *server = NFS_SERVER(state->inode); 2284 struct nfs4_exception exception = { }; 2285 int err; 2286 2287 do { 2288 err = _nfs4_open_expired(ctx, state); 2289 trace_nfs4_open_expired(ctx, 0, err); 2290 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2291 continue; 2292 switch (err) { 2293 default: 2294 goto out; 2295 case -NFS4ERR_GRACE: 2296 case -NFS4ERR_DELAY: 2297 nfs4_handle_exception(server, err, &exception); 2298 err = 0; 2299 } 2300 } while (exception.retry); 2301 out: 2302 return err; 2303 } 2304 2305 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2306 { 2307 struct nfs_open_context *ctx; 2308 int ret; 2309 2310 ctx = nfs4_state_find_open_context(state); 2311 if (IS_ERR(ctx)) 2312 return -EAGAIN; 2313 ret = nfs4_do_open_expired(ctx, state); 2314 put_nfs_open_context(ctx); 2315 return ret; 2316 } 2317 2318 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state) 2319 { 2320 nfs_remove_bad_delegation(state->inode); 2321 write_seqlock(&state->seqlock); 2322 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2323 write_sequnlock(&state->seqlock); 2324 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2325 } 2326 2327 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2328 { 2329 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2330 nfs_finish_clear_delegation_stateid(state); 2331 } 2332 2333 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2334 { 2335 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2336 nfs40_clear_delegation_stateid(state); 2337 return nfs4_open_expired(sp, state); 2338 } 2339 2340 #if defined(CONFIG_NFS_V4_1) 2341 static void nfs41_check_delegation_stateid(struct nfs4_state *state) 2342 { 2343 struct nfs_server *server = NFS_SERVER(state->inode); 2344 nfs4_stateid stateid; 2345 struct nfs_delegation *delegation; 2346 struct rpc_cred *cred; 2347 int status; 2348 2349 /* Get the delegation credential for use by test/free_stateid */ 2350 rcu_read_lock(); 2351 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2352 if (delegation == NULL) { 2353 rcu_read_unlock(); 2354 return; 2355 } 2356 2357 nfs4_stateid_copy(&stateid, &delegation->stateid); 2358 cred = get_rpccred(delegation->cred); 2359 rcu_read_unlock(); 2360 status = nfs41_test_stateid(server, &stateid, cred); 2361 trace_nfs4_test_delegation_stateid(state, NULL, status); 2362 2363 if (status != NFS_OK) { 2364 /* Free the stateid unless the server explicitly 2365 * informs us the stateid is unrecognized. */ 2366 if (status != -NFS4ERR_BAD_STATEID) 2367 nfs41_free_stateid(server, &stateid, cred); 2368 nfs_finish_clear_delegation_stateid(state); 2369 } 2370 2371 put_rpccred(cred); 2372 } 2373 2374 /** 2375 * nfs41_check_open_stateid - possibly free an open stateid 2376 * 2377 * @state: NFSv4 state for an inode 2378 * 2379 * Returns NFS_OK if recovery for this stateid is now finished. 2380 * Otherwise a negative NFS4ERR value is returned. 2381 */ 2382 static int nfs41_check_open_stateid(struct nfs4_state *state) 2383 { 2384 struct nfs_server *server = NFS_SERVER(state->inode); 2385 nfs4_stateid *stateid = &state->open_stateid; 2386 struct rpc_cred *cred = state->owner->so_cred; 2387 int status; 2388 2389 /* If a state reset has been done, test_stateid is unneeded */ 2390 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) && 2391 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) && 2392 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0)) 2393 return -NFS4ERR_BAD_STATEID; 2394 2395 status = nfs41_test_stateid(server, stateid, cred); 2396 trace_nfs4_test_open_stateid(state, NULL, status); 2397 if (status != NFS_OK) { 2398 /* Free the stateid unless the server explicitly 2399 * informs us the stateid is unrecognized. */ 2400 if (status != -NFS4ERR_BAD_STATEID) 2401 nfs41_free_stateid(server, stateid, cred); 2402 2403 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 2404 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 2405 clear_bit(NFS_O_RDWR_STATE, &state->flags); 2406 clear_bit(NFS_OPEN_STATE, &state->flags); 2407 } 2408 return status; 2409 } 2410 2411 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2412 { 2413 int status; 2414 2415 nfs41_check_delegation_stateid(state); 2416 status = nfs41_check_open_stateid(state); 2417 if (status != NFS_OK) 2418 status = nfs4_open_expired(sp, state); 2419 return status; 2420 } 2421 #endif 2422 2423 /* 2424 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2425 * fields corresponding to attributes that were used to store the verifier. 2426 * Make sure we clobber those fields in the later setattr call 2427 */ 2428 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 2429 struct iattr *sattr, struct nfs4_label **label) 2430 { 2431 const u32 *attrset = opendata->o_res.attrset; 2432 2433 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) && 2434 !(sattr->ia_valid & ATTR_ATIME_SET)) 2435 sattr->ia_valid |= ATTR_ATIME; 2436 2437 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) && 2438 !(sattr->ia_valid & ATTR_MTIME_SET)) 2439 sattr->ia_valid |= ATTR_MTIME; 2440 2441 /* Except MODE, it seems harmless of setting twice. */ 2442 if ((attrset[1] & FATTR4_WORD1_MODE)) 2443 sattr->ia_valid &= ~ATTR_MODE; 2444 2445 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL) 2446 *label = NULL; 2447 } 2448 2449 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 2450 fmode_t fmode, 2451 int flags, 2452 struct nfs_open_context *ctx) 2453 { 2454 struct nfs4_state_owner *sp = opendata->owner; 2455 struct nfs_server *server = sp->so_server; 2456 struct dentry *dentry; 2457 struct nfs4_state *state; 2458 unsigned int seq; 2459 int ret; 2460 2461 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 2462 2463 ret = _nfs4_proc_open(opendata); 2464 if (ret != 0) 2465 goto out; 2466 2467 state = nfs4_opendata_to_nfs4_state(opendata); 2468 ret = PTR_ERR(state); 2469 if (IS_ERR(state)) 2470 goto out; 2471 if (server->caps & NFS_CAP_POSIX_LOCK) 2472 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 2473 2474 dentry = opendata->dentry; 2475 if (d_really_is_negative(dentry)) { 2476 struct dentry *alias; 2477 d_drop(dentry); 2478 alias = d_exact_alias(dentry, state->inode); 2479 if (!alias) 2480 alias = d_splice_alias(igrab(state->inode), dentry); 2481 /* d_splice_alias() can't fail here - it's a non-directory */ 2482 if (alias) { 2483 dput(ctx->dentry); 2484 ctx->dentry = dentry = alias; 2485 } 2486 nfs_set_verifier(dentry, 2487 nfs_save_change_attribute(d_inode(opendata->dir))); 2488 } 2489 2490 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags); 2491 if (ret != 0) 2492 goto out; 2493 2494 ctx->state = state; 2495 if (d_inode(dentry) == state->inode) { 2496 nfs_inode_attach_open_context(ctx); 2497 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 2498 nfs4_schedule_stateid_recovery(server, state); 2499 } 2500 out: 2501 return ret; 2502 } 2503 2504 /* 2505 * Returns a referenced nfs4_state 2506 */ 2507 static int _nfs4_do_open(struct inode *dir, 2508 struct nfs_open_context *ctx, 2509 int flags, 2510 struct iattr *sattr, 2511 struct nfs4_label *label, 2512 int *opened) 2513 { 2514 struct nfs4_state_owner *sp; 2515 struct nfs4_state *state = NULL; 2516 struct nfs_server *server = NFS_SERVER(dir); 2517 struct nfs4_opendata *opendata; 2518 struct dentry *dentry = ctx->dentry; 2519 struct rpc_cred *cred = ctx->cred; 2520 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 2521 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 2522 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 2523 struct nfs4_label *olabel = NULL; 2524 int status; 2525 2526 /* Protect against reboot recovery conflicts */ 2527 status = -ENOMEM; 2528 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 2529 if (sp == NULL) { 2530 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 2531 goto out_err; 2532 } 2533 status = nfs4_recover_expired_lease(server); 2534 if (status != 0) 2535 goto err_put_state_owner; 2536 if (d_really_is_positive(dentry)) 2537 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 2538 status = -ENOMEM; 2539 if (d_really_is_positive(dentry)) 2540 claim = NFS4_OPEN_CLAIM_FH; 2541 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, 2542 label, claim, GFP_KERNEL); 2543 if (opendata == NULL) 2544 goto err_put_state_owner; 2545 2546 if (label) { 2547 olabel = nfs4_label_alloc(server, GFP_KERNEL); 2548 if (IS_ERR(olabel)) { 2549 status = PTR_ERR(olabel); 2550 goto err_opendata_put; 2551 } 2552 } 2553 2554 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 2555 if (!opendata->f_attr.mdsthreshold) { 2556 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 2557 if (!opendata->f_attr.mdsthreshold) 2558 goto err_free_label; 2559 } 2560 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 2561 } 2562 if (d_really_is_positive(dentry)) 2563 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 2564 2565 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx); 2566 if (status != 0) 2567 goto err_free_label; 2568 state = ctx->state; 2569 2570 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 2571 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 2572 nfs4_exclusive_attrset(opendata, sattr, &label); 2573 /* 2574 * send create attributes which was not set by open 2575 * with an extra setattr. 2576 */ 2577 if (sattr->ia_valid & NFS4_VALID_ATTRS) { 2578 nfs_fattr_init(opendata->o_res.f_attr); 2579 status = nfs4_do_setattr(state->inode, cred, 2580 opendata->o_res.f_attr, sattr, 2581 state, label, olabel); 2582 if (status == 0) { 2583 nfs_setattr_update_inode(state->inode, sattr, 2584 opendata->o_res.f_attr); 2585 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); 2586 } 2587 } 2588 } 2589 if (opened && opendata->file_created) 2590 *opened |= FILE_CREATED; 2591 2592 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 2593 *ctx_th = opendata->f_attr.mdsthreshold; 2594 opendata->f_attr.mdsthreshold = NULL; 2595 } 2596 2597 nfs4_label_free(olabel); 2598 2599 nfs4_opendata_put(opendata); 2600 nfs4_put_state_owner(sp); 2601 return 0; 2602 err_free_label: 2603 nfs4_label_free(olabel); 2604 err_opendata_put: 2605 nfs4_opendata_put(opendata); 2606 err_put_state_owner: 2607 nfs4_put_state_owner(sp); 2608 out_err: 2609 return status; 2610 } 2611 2612 2613 static struct nfs4_state *nfs4_do_open(struct inode *dir, 2614 struct nfs_open_context *ctx, 2615 int flags, 2616 struct iattr *sattr, 2617 struct nfs4_label *label, 2618 int *opened) 2619 { 2620 struct nfs_server *server = NFS_SERVER(dir); 2621 struct nfs4_exception exception = { }; 2622 struct nfs4_state *res; 2623 int status; 2624 2625 do { 2626 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened); 2627 res = ctx->state; 2628 trace_nfs4_open_file(ctx, flags, status); 2629 if (status == 0) 2630 break; 2631 /* NOTE: BAD_SEQID means the server and client disagree about the 2632 * book-keeping w.r.t. state-changing operations 2633 * (OPEN/CLOSE/LOCK/LOCKU...) 2634 * It is actually a sign of a bug on the client or on the server. 2635 * 2636 * If we receive a BAD_SEQID error in the particular case of 2637 * doing an OPEN, we assume that nfs_increment_open_seqid() will 2638 * have unhashed the old state_owner for us, and that we can 2639 * therefore safely retry using a new one. We should still warn 2640 * the user though... 2641 */ 2642 if (status == -NFS4ERR_BAD_SEQID) { 2643 pr_warn_ratelimited("NFS: v4 server %s " 2644 " returned a bad sequence-id error!\n", 2645 NFS_SERVER(dir)->nfs_client->cl_hostname); 2646 exception.retry = 1; 2647 continue; 2648 } 2649 /* 2650 * BAD_STATEID on OPEN means that the server cancelled our 2651 * state before it received the OPEN_CONFIRM. 2652 * Recover by retrying the request as per the discussion 2653 * on Page 181 of RFC3530. 2654 */ 2655 if (status == -NFS4ERR_BAD_STATEID) { 2656 exception.retry = 1; 2657 continue; 2658 } 2659 if (status == -EAGAIN) { 2660 /* We must have found a delegation */ 2661 exception.retry = 1; 2662 continue; 2663 } 2664 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 2665 continue; 2666 res = ERR_PTR(nfs4_handle_exception(server, 2667 status, &exception)); 2668 } while (exception.retry); 2669 return res; 2670 } 2671 2672 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 2673 struct nfs_fattr *fattr, struct iattr *sattr, 2674 struct nfs4_state *state, struct nfs4_label *ilabel, 2675 struct nfs4_label *olabel) 2676 { 2677 struct nfs_server *server = NFS_SERVER(inode); 2678 struct nfs_setattrargs arg = { 2679 .fh = NFS_FH(inode), 2680 .iap = sattr, 2681 .server = server, 2682 .bitmask = server->attr_bitmask, 2683 .label = ilabel, 2684 }; 2685 struct nfs_setattrres res = { 2686 .fattr = fattr, 2687 .label = olabel, 2688 .server = server, 2689 }; 2690 struct rpc_message msg = { 2691 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 2692 .rpc_argp = &arg, 2693 .rpc_resp = &res, 2694 .rpc_cred = cred, 2695 }; 2696 struct rpc_cred *delegation_cred = NULL; 2697 unsigned long timestamp = jiffies; 2698 fmode_t fmode; 2699 bool truncate; 2700 int status; 2701 2702 arg.bitmask = nfs4_bitmask(server, ilabel); 2703 if (ilabel) 2704 arg.bitmask = nfs4_bitmask(server, olabel); 2705 2706 nfs_fattr_init(fattr); 2707 2708 /* Servers should only apply open mode checks for file size changes */ 2709 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false; 2710 fmode = truncate ? FMODE_WRITE : FMODE_READ; 2711 2712 if (nfs4_copy_delegation_stateid(inode, fmode, &arg.stateid, &delegation_cred)) { 2713 /* Use that stateid */ 2714 } else if (truncate && state != NULL) { 2715 struct nfs_lockowner lockowner = { 2716 .l_owner = current->files, 2717 .l_pid = current->tgid, 2718 }; 2719 if (!nfs4_valid_open_stateid(state)) 2720 return -EBADF; 2721 if (nfs4_select_rw_stateid(state, FMODE_WRITE, &lockowner, 2722 &arg.stateid, &delegation_cred) == -EIO) 2723 return -EBADF; 2724 } else 2725 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 2726 if (delegation_cred) 2727 msg.rpc_cred = delegation_cred; 2728 2729 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 2730 2731 put_rpccred(delegation_cred); 2732 if (status == 0 && state != NULL) 2733 renew_lease(server, timestamp); 2734 trace_nfs4_setattr(inode, &arg.stateid, status); 2735 return status; 2736 } 2737 2738 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 2739 struct nfs_fattr *fattr, struct iattr *sattr, 2740 struct nfs4_state *state, struct nfs4_label *ilabel, 2741 struct nfs4_label *olabel) 2742 { 2743 struct nfs_server *server = NFS_SERVER(inode); 2744 struct nfs4_exception exception = { 2745 .state = state, 2746 .inode = inode, 2747 }; 2748 int err; 2749 do { 2750 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel); 2751 switch (err) { 2752 case -NFS4ERR_OPENMODE: 2753 if (!(sattr->ia_valid & ATTR_SIZE)) { 2754 pr_warn_once("NFSv4: server %s is incorrectly " 2755 "applying open mode checks to " 2756 "a SETATTR that is not " 2757 "changing file size.\n", 2758 server->nfs_client->cl_hostname); 2759 } 2760 if (state && !(state->state & FMODE_WRITE)) { 2761 err = -EBADF; 2762 if (sattr->ia_valid & ATTR_OPEN) 2763 err = -EACCES; 2764 goto out; 2765 } 2766 } 2767 err = nfs4_handle_exception(server, err, &exception); 2768 } while (exception.retry); 2769 out: 2770 return err; 2771 } 2772 2773 static bool 2774 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 2775 { 2776 if (inode == NULL || !nfs_have_layout(inode)) 2777 return false; 2778 2779 return pnfs_wait_on_layoutreturn(inode, task); 2780 } 2781 2782 struct nfs4_closedata { 2783 struct inode *inode; 2784 struct nfs4_state *state; 2785 struct nfs_closeargs arg; 2786 struct nfs_closeres res; 2787 struct nfs_fattr fattr; 2788 unsigned long timestamp; 2789 bool roc; 2790 u32 roc_barrier; 2791 }; 2792 2793 static void nfs4_free_closedata(void *data) 2794 { 2795 struct nfs4_closedata *calldata = data; 2796 struct nfs4_state_owner *sp = calldata->state->owner; 2797 struct super_block *sb = calldata->state->inode->i_sb; 2798 2799 if (calldata->roc) 2800 pnfs_roc_release(calldata->state->inode); 2801 nfs4_put_open_state(calldata->state); 2802 nfs_free_seqid(calldata->arg.seqid); 2803 nfs4_put_state_owner(sp); 2804 nfs_sb_deactive(sb); 2805 kfree(calldata); 2806 } 2807 2808 static void nfs4_close_done(struct rpc_task *task, void *data) 2809 { 2810 struct nfs4_closedata *calldata = data; 2811 struct nfs4_state *state = calldata->state; 2812 struct nfs_server *server = NFS_SERVER(calldata->inode); 2813 nfs4_stateid *res_stateid = NULL; 2814 2815 dprintk("%s: begin!\n", __func__); 2816 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 2817 return; 2818 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 2819 /* hmm. we are done with the inode, and in the process of freeing 2820 * the state_owner. we keep this around to process errors 2821 */ 2822 switch (task->tk_status) { 2823 case 0: 2824 res_stateid = &calldata->res.stateid; 2825 if (calldata->roc) 2826 pnfs_roc_set_barrier(state->inode, 2827 calldata->roc_barrier); 2828 renew_lease(server, calldata->timestamp); 2829 break; 2830 case -NFS4ERR_ADMIN_REVOKED: 2831 case -NFS4ERR_STALE_STATEID: 2832 case -NFS4ERR_OLD_STATEID: 2833 case -NFS4ERR_BAD_STATEID: 2834 case -NFS4ERR_EXPIRED: 2835 if (!nfs4_stateid_match(&calldata->arg.stateid, 2836 &state->open_stateid)) { 2837 rpc_restart_call_prepare(task); 2838 goto out_release; 2839 } 2840 if (calldata->arg.fmode == 0) 2841 break; 2842 default: 2843 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) { 2844 rpc_restart_call_prepare(task); 2845 goto out_release; 2846 } 2847 } 2848 nfs_clear_open_stateid(state, &calldata->arg.stateid, 2849 res_stateid, calldata->arg.fmode); 2850 out_release: 2851 nfs_release_seqid(calldata->arg.seqid); 2852 nfs_refresh_inode(calldata->inode, calldata->res.fattr); 2853 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); 2854 } 2855 2856 static void nfs4_close_prepare(struct rpc_task *task, void *data) 2857 { 2858 struct nfs4_closedata *calldata = data; 2859 struct nfs4_state *state = calldata->state; 2860 struct inode *inode = calldata->inode; 2861 bool is_rdonly, is_wronly, is_rdwr; 2862 int call_close = 0; 2863 2864 dprintk("%s: begin!\n", __func__); 2865 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 2866 goto out_wait; 2867 2868 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 2869 spin_lock(&state->owner->so_lock); 2870 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 2871 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 2872 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 2873 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid); 2874 /* Calculate the change in open mode */ 2875 calldata->arg.fmode = 0; 2876 if (state->n_rdwr == 0) { 2877 if (state->n_rdonly == 0) 2878 call_close |= is_rdonly; 2879 else if (is_rdonly) 2880 calldata->arg.fmode |= FMODE_READ; 2881 if (state->n_wronly == 0) 2882 call_close |= is_wronly; 2883 else if (is_wronly) 2884 calldata->arg.fmode |= FMODE_WRITE; 2885 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 2886 call_close |= is_rdwr; 2887 } else if (is_rdwr) 2888 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 2889 2890 if (!nfs4_valid_open_stateid(state)) 2891 call_close = 0; 2892 spin_unlock(&state->owner->so_lock); 2893 2894 if (!call_close) { 2895 /* Note: exit _without_ calling nfs4_close_done */ 2896 goto out_no_action; 2897 } 2898 2899 if (nfs4_wait_on_layoutreturn(inode, task)) { 2900 nfs_release_seqid(calldata->arg.seqid); 2901 goto out_wait; 2902 } 2903 2904 if (calldata->arg.fmode == 0) 2905 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 2906 if (calldata->roc) 2907 pnfs_roc_get_barrier(inode, &calldata->roc_barrier); 2908 2909 calldata->arg.share_access = 2910 nfs4_map_atomic_open_share(NFS_SERVER(inode), 2911 calldata->arg.fmode, 0); 2912 2913 nfs_fattr_init(calldata->res.fattr); 2914 calldata->timestamp = jiffies; 2915 if (nfs4_setup_sequence(NFS_SERVER(inode), 2916 &calldata->arg.seq_args, 2917 &calldata->res.seq_res, 2918 task) != 0) 2919 nfs_release_seqid(calldata->arg.seqid); 2920 dprintk("%s: done!\n", __func__); 2921 return; 2922 out_no_action: 2923 task->tk_action = NULL; 2924 out_wait: 2925 nfs4_sequence_done(task, &calldata->res.seq_res); 2926 } 2927 2928 static const struct rpc_call_ops nfs4_close_ops = { 2929 .rpc_call_prepare = nfs4_close_prepare, 2930 .rpc_call_done = nfs4_close_done, 2931 .rpc_release = nfs4_free_closedata, 2932 }; 2933 2934 static bool nfs4_roc(struct inode *inode) 2935 { 2936 if (!nfs_have_layout(inode)) 2937 return false; 2938 return pnfs_roc(inode); 2939 } 2940 2941 /* 2942 * It is possible for data to be read/written from a mem-mapped file 2943 * after the sys_close call (which hits the vfs layer as a flush). 2944 * This means that we can't safely call nfsv4 close on a file until 2945 * the inode is cleared. This in turn means that we are not good 2946 * NFSv4 citizens - we do not indicate to the server to update the file's 2947 * share state even when we are done with one of the three share 2948 * stateid's in the inode. 2949 * 2950 * NOTE: Caller must be holding the sp->so_owner semaphore! 2951 */ 2952 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 2953 { 2954 struct nfs_server *server = NFS_SERVER(state->inode); 2955 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 2956 struct nfs4_closedata *calldata; 2957 struct nfs4_state_owner *sp = state->owner; 2958 struct rpc_task *task; 2959 struct rpc_message msg = { 2960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 2961 .rpc_cred = state->owner->so_cred, 2962 }; 2963 struct rpc_task_setup task_setup_data = { 2964 .rpc_client = server->client, 2965 .rpc_message = &msg, 2966 .callback_ops = &nfs4_close_ops, 2967 .workqueue = nfsiod_workqueue, 2968 .flags = RPC_TASK_ASYNC, 2969 }; 2970 int status = -ENOMEM; 2971 2972 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 2973 &task_setup_data.rpc_client, &msg); 2974 2975 calldata = kzalloc(sizeof(*calldata), gfp_mask); 2976 if (calldata == NULL) 2977 goto out; 2978 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1); 2979 calldata->inode = state->inode; 2980 calldata->state = state; 2981 calldata->arg.fh = NFS_FH(state->inode); 2982 /* Serialization for the sequence id */ 2983 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 2984 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 2985 if (IS_ERR(calldata->arg.seqid)) 2986 goto out_free_calldata; 2987 calldata->arg.fmode = 0; 2988 calldata->arg.bitmask = server->cache_consistency_bitmask; 2989 calldata->res.fattr = &calldata->fattr; 2990 calldata->res.seqid = calldata->arg.seqid; 2991 calldata->res.server = server; 2992 calldata->roc = nfs4_roc(state->inode); 2993 nfs_sb_active(calldata->inode->i_sb); 2994 2995 msg.rpc_argp = &calldata->arg; 2996 msg.rpc_resp = &calldata->res; 2997 task_setup_data.callback_data = calldata; 2998 task = rpc_run_task(&task_setup_data); 2999 if (IS_ERR(task)) 3000 return PTR_ERR(task); 3001 status = 0; 3002 if (wait) 3003 status = rpc_wait_for_completion_task(task); 3004 rpc_put_task(task); 3005 return status; 3006 out_free_calldata: 3007 kfree(calldata); 3008 out: 3009 nfs4_put_open_state(state); 3010 nfs4_put_state_owner(sp); 3011 return status; 3012 } 3013 3014 static struct inode * 3015 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3016 int open_flags, struct iattr *attr, int *opened) 3017 { 3018 struct nfs4_state *state; 3019 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 3020 3021 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3022 3023 /* Protect against concurrent sillydeletes */ 3024 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3025 3026 nfs4_label_release_security(label); 3027 3028 if (IS_ERR(state)) 3029 return ERR_CAST(state); 3030 return state->inode; 3031 } 3032 3033 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3034 { 3035 if (ctx->state == NULL) 3036 return; 3037 if (is_sync) 3038 nfs4_close_sync(ctx->state, ctx->mode); 3039 else 3040 nfs4_close_state(ctx->state, ctx->mode); 3041 } 3042 3043 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3044 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3045 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL) 3046 3047 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3048 { 3049 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3050 struct nfs4_server_caps_arg args = { 3051 .fhandle = fhandle, 3052 .bitmask = bitmask, 3053 }; 3054 struct nfs4_server_caps_res res = {}; 3055 struct rpc_message msg = { 3056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3057 .rpc_argp = &args, 3058 .rpc_resp = &res, 3059 }; 3060 int status; 3061 3062 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3063 FATTR4_WORD0_FH_EXPIRE_TYPE | 3064 FATTR4_WORD0_LINK_SUPPORT | 3065 FATTR4_WORD0_SYMLINK_SUPPORT | 3066 FATTR4_WORD0_ACLSUPPORT; 3067 if (minorversion) 3068 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3069 3070 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3071 if (status == 0) { 3072 /* Sanity check the server answers */ 3073 switch (minorversion) { 3074 case 0: 3075 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3076 res.attr_bitmask[2] = 0; 3077 break; 3078 case 1: 3079 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3080 break; 3081 case 2: 3082 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3083 } 3084 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3085 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| 3086 NFS_CAP_SYMLINKS|NFS_CAP_FILEID| 3087 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| 3088 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| 3089 NFS_CAP_CTIME|NFS_CAP_MTIME| 3090 NFS_CAP_SECURITY_LABEL); 3091 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3092 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3093 server->caps |= NFS_CAP_ACLS; 3094 if (res.has_links != 0) 3095 server->caps |= NFS_CAP_HARDLINKS; 3096 if (res.has_symlinks != 0) 3097 server->caps |= NFS_CAP_SYMLINKS; 3098 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) 3099 server->caps |= NFS_CAP_FILEID; 3100 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) 3101 server->caps |= NFS_CAP_MODE; 3102 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) 3103 server->caps |= NFS_CAP_NLINK; 3104 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) 3105 server->caps |= NFS_CAP_OWNER; 3106 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) 3107 server->caps |= NFS_CAP_OWNER_GROUP; 3108 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) 3109 server->caps |= NFS_CAP_ATIME; 3110 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) 3111 server->caps |= NFS_CAP_CTIME; 3112 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) 3113 server->caps |= NFS_CAP_MTIME; 3114 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3115 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3116 server->caps |= NFS_CAP_SECURITY_LABEL; 3117 #endif 3118 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3119 sizeof(server->attr_bitmask)); 3120 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3121 3122 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3123 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3124 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3125 server->cache_consistency_bitmask[2] = 0; 3126 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3127 sizeof(server->exclcreat_bitmask)); 3128 server->acl_bitmask = res.acl_bitmask; 3129 server->fh_expire_type = res.fh_expire_type; 3130 } 3131 3132 return status; 3133 } 3134 3135 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3136 { 3137 struct nfs4_exception exception = { }; 3138 int err; 3139 do { 3140 err = nfs4_handle_exception(server, 3141 _nfs4_server_capabilities(server, fhandle), 3142 &exception); 3143 } while (exception.retry); 3144 return err; 3145 } 3146 3147 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3148 struct nfs_fsinfo *info) 3149 { 3150 u32 bitmask[3]; 3151 struct nfs4_lookup_root_arg args = { 3152 .bitmask = bitmask, 3153 }; 3154 struct nfs4_lookup_res res = { 3155 .server = server, 3156 .fattr = info->fattr, 3157 .fh = fhandle, 3158 }; 3159 struct rpc_message msg = { 3160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 3161 .rpc_argp = &args, 3162 .rpc_resp = &res, 3163 }; 3164 3165 bitmask[0] = nfs4_fattr_bitmap[0]; 3166 bitmask[1] = nfs4_fattr_bitmap[1]; 3167 /* 3168 * Process the label in the upcoming getfattr 3169 */ 3170 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 3171 3172 nfs_fattr_init(info->fattr); 3173 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3174 } 3175 3176 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3177 struct nfs_fsinfo *info) 3178 { 3179 struct nfs4_exception exception = { }; 3180 int err; 3181 do { 3182 err = _nfs4_lookup_root(server, fhandle, info); 3183 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 3184 switch (err) { 3185 case 0: 3186 case -NFS4ERR_WRONGSEC: 3187 goto out; 3188 default: 3189 err = nfs4_handle_exception(server, err, &exception); 3190 } 3191 } while (exception.retry); 3192 out: 3193 return err; 3194 } 3195 3196 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3197 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 3198 { 3199 struct rpc_auth_create_args auth_args = { 3200 .pseudoflavor = flavor, 3201 }; 3202 struct rpc_auth *auth; 3203 int ret; 3204 3205 auth = rpcauth_create(&auth_args, server->client); 3206 if (IS_ERR(auth)) { 3207 ret = -EACCES; 3208 goto out; 3209 } 3210 ret = nfs4_lookup_root(server, fhandle, info); 3211 out: 3212 return ret; 3213 } 3214 3215 /* 3216 * Retry pseudoroot lookup with various security flavors. We do this when: 3217 * 3218 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 3219 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 3220 * 3221 * Returns zero on success, or a negative NFS4ERR value, or a 3222 * negative errno value. 3223 */ 3224 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3225 struct nfs_fsinfo *info) 3226 { 3227 /* Per 3530bis 15.33.5 */ 3228 static const rpc_authflavor_t flav_array[] = { 3229 RPC_AUTH_GSS_KRB5P, 3230 RPC_AUTH_GSS_KRB5I, 3231 RPC_AUTH_GSS_KRB5, 3232 RPC_AUTH_UNIX, /* courtesy */ 3233 RPC_AUTH_NULL, 3234 }; 3235 int status = -EPERM; 3236 size_t i; 3237 3238 if (server->auth_info.flavor_len > 0) { 3239 /* try each flavor specified by user */ 3240 for (i = 0; i < server->auth_info.flavor_len; i++) { 3241 status = nfs4_lookup_root_sec(server, fhandle, info, 3242 server->auth_info.flavors[i]); 3243 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3244 continue; 3245 break; 3246 } 3247 } else { 3248 /* no flavors specified by user, try default list */ 3249 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 3250 status = nfs4_lookup_root_sec(server, fhandle, info, 3251 flav_array[i]); 3252 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3253 continue; 3254 break; 3255 } 3256 } 3257 3258 /* 3259 * -EACCESS could mean that the user doesn't have correct permissions 3260 * to access the mount. It could also mean that we tried to mount 3261 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 3262 * existing mount programs don't handle -EACCES very well so it should 3263 * be mapped to -EPERM instead. 3264 */ 3265 if (status == -EACCES) 3266 status = -EPERM; 3267 return status; 3268 } 3269 3270 static int nfs4_do_find_root_sec(struct nfs_server *server, 3271 struct nfs_fh *fhandle, struct nfs_fsinfo *info) 3272 { 3273 int mv = server->nfs_client->cl_minorversion; 3274 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info); 3275 } 3276 3277 /** 3278 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 3279 * @server: initialized nfs_server handle 3280 * @fhandle: we fill in the pseudo-fs root file handle 3281 * @info: we fill in an FSINFO struct 3282 * @auth_probe: probe the auth flavours 3283 * 3284 * Returns zero on success, or a negative errno. 3285 */ 3286 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 3287 struct nfs_fsinfo *info, 3288 bool auth_probe) 3289 { 3290 int status = 0; 3291 3292 if (!auth_probe) 3293 status = nfs4_lookup_root(server, fhandle, info); 3294 3295 if (auth_probe || status == NFS4ERR_WRONGSEC) 3296 status = nfs4_do_find_root_sec(server, fhandle, info); 3297 3298 if (status == 0) 3299 status = nfs4_server_capabilities(server, fhandle); 3300 if (status == 0) 3301 status = nfs4_do_fsinfo(server, fhandle, info); 3302 3303 return nfs4_map_errors(status); 3304 } 3305 3306 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 3307 struct nfs_fsinfo *info) 3308 { 3309 int error; 3310 struct nfs_fattr *fattr = info->fattr; 3311 struct nfs4_label *label = NULL; 3312 3313 error = nfs4_server_capabilities(server, mntfh); 3314 if (error < 0) { 3315 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 3316 return error; 3317 } 3318 3319 label = nfs4_label_alloc(server, GFP_KERNEL); 3320 if (IS_ERR(label)) 3321 return PTR_ERR(label); 3322 3323 error = nfs4_proc_getattr(server, mntfh, fattr, label); 3324 if (error < 0) { 3325 dprintk("nfs4_get_root: getattr error = %d\n", -error); 3326 goto err_free_label; 3327 } 3328 3329 if (fattr->valid & NFS_ATTR_FATTR_FSID && 3330 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 3331 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 3332 3333 err_free_label: 3334 nfs4_label_free(label); 3335 3336 return error; 3337 } 3338 3339 /* 3340 * Get locations and (maybe) other attributes of a referral. 3341 * Note that we'll actually follow the referral later when 3342 * we detect fsid mismatch in inode revalidation 3343 */ 3344 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 3345 const struct qstr *name, struct nfs_fattr *fattr, 3346 struct nfs_fh *fhandle) 3347 { 3348 int status = -ENOMEM; 3349 struct page *page = NULL; 3350 struct nfs4_fs_locations *locations = NULL; 3351 3352 page = alloc_page(GFP_KERNEL); 3353 if (page == NULL) 3354 goto out; 3355 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 3356 if (locations == NULL) 3357 goto out; 3358 3359 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 3360 if (status != 0) 3361 goto out; 3362 3363 /* 3364 * If the fsid didn't change, this is a migration event, not a 3365 * referral. Cause us to drop into the exception handler, which 3366 * will kick off migration recovery. 3367 */ 3368 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 3369 dprintk("%s: server did not return a different fsid for" 3370 " a referral at %s\n", __func__, name->name); 3371 status = -NFS4ERR_MOVED; 3372 goto out; 3373 } 3374 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 3375 nfs_fixup_referral_attributes(&locations->fattr); 3376 3377 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 3378 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 3379 memset(fhandle, 0, sizeof(struct nfs_fh)); 3380 out: 3381 if (page) 3382 __free_page(page); 3383 kfree(locations); 3384 return status; 3385 } 3386 3387 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3388 struct nfs_fattr *fattr, struct nfs4_label *label) 3389 { 3390 struct nfs4_getattr_arg args = { 3391 .fh = fhandle, 3392 .bitmask = server->attr_bitmask, 3393 }; 3394 struct nfs4_getattr_res res = { 3395 .fattr = fattr, 3396 .label = label, 3397 .server = server, 3398 }; 3399 struct rpc_message msg = { 3400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 3401 .rpc_argp = &args, 3402 .rpc_resp = &res, 3403 }; 3404 3405 args.bitmask = nfs4_bitmask(server, label); 3406 3407 nfs_fattr_init(fattr); 3408 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3409 } 3410 3411 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3412 struct nfs_fattr *fattr, struct nfs4_label *label) 3413 { 3414 struct nfs4_exception exception = { }; 3415 int err; 3416 do { 3417 err = _nfs4_proc_getattr(server, fhandle, fattr, label); 3418 trace_nfs4_getattr(server, fhandle, fattr, err); 3419 err = nfs4_handle_exception(server, err, 3420 &exception); 3421 } while (exception.retry); 3422 return err; 3423 } 3424 3425 /* 3426 * The file is not closed if it is opened due to the a request to change 3427 * the size of the file. The open call will not be needed once the 3428 * VFS layer lookup-intents are implemented. 3429 * 3430 * Close is called when the inode is destroyed. 3431 * If we haven't opened the file for O_WRONLY, we 3432 * need to in the size_change case to obtain a stateid. 3433 * 3434 * Got race? 3435 * Because OPEN is always done by name in nfsv4, it is 3436 * possible that we opened a different file by the same 3437 * name. We can recognize this race condition, but we 3438 * can't do anything about it besides returning an error. 3439 * 3440 * This will be fixed with VFS changes (lookup-intent). 3441 */ 3442 static int 3443 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 3444 struct iattr *sattr) 3445 { 3446 struct inode *inode = d_inode(dentry); 3447 struct rpc_cred *cred = NULL; 3448 struct nfs4_state *state = NULL; 3449 struct nfs4_label *label = NULL; 3450 int status; 3451 3452 if (pnfs_ld_layoutret_on_setattr(inode) && 3453 sattr->ia_valid & ATTR_SIZE && 3454 sattr->ia_size < i_size_read(inode)) 3455 pnfs_commit_and_return_layout(inode); 3456 3457 nfs_fattr_init(fattr); 3458 3459 /* Deal with open(O_TRUNC) */ 3460 if (sattr->ia_valid & ATTR_OPEN) 3461 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 3462 3463 /* Optimization: if the end result is no change, don't RPC */ 3464 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 3465 return 0; 3466 3467 /* Search for an existing open(O_WRITE) file */ 3468 if (sattr->ia_valid & ATTR_FILE) { 3469 struct nfs_open_context *ctx; 3470 3471 ctx = nfs_file_open_context(sattr->ia_file); 3472 if (ctx) { 3473 cred = ctx->cred; 3474 state = ctx->state; 3475 } 3476 } 3477 3478 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 3479 if (IS_ERR(label)) 3480 return PTR_ERR(label); 3481 3482 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label); 3483 if (status == 0) { 3484 nfs_setattr_update_inode(inode, sattr, fattr); 3485 nfs_setsecurity(inode, fattr, label); 3486 } 3487 nfs4_label_free(label); 3488 return status; 3489 } 3490 3491 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 3492 const struct qstr *name, struct nfs_fh *fhandle, 3493 struct nfs_fattr *fattr, struct nfs4_label *label) 3494 { 3495 struct nfs_server *server = NFS_SERVER(dir); 3496 int status; 3497 struct nfs4_lookup_arg args = { 3498 .bitmask = server->attr_bitmask, 3499 .dir_fh = NFS_FH(dir), 3500 .name = name, 3501 }; 3502 struct nfs4_lookup_res res = { 3503 .server = server, 3504 .fattr = fattr, 3505 .label = label, 3506 .fh = fhandle, 3507 }; 3508 struct rpc_message msg = { 3509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 3510 .rpc_argp = &args, 3511 .rpc_resp = &res, 3512 }; 3513 3514 args.bitmask = nfs4_bitmask(server, label); 3515 3516 nfs_fattr_init(fattr); 3517 3518 dprintk("NFS call lookup %s\n", name->name); 3519 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); 3520 dprintk("NFS reply lookup: %d\n", status); 3521 return status; 3522 } 3523 3524 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 3525 { 3526 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 3527 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 3528 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 3529 fattr->nlink = 2; 3530 } 3531 3532 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 3533 struct qstr *name, struct nfs_fh *fhandle, 3534 struct nfs_fattr *fattr, struct nfs4_label *label) 3535 { 3536 struct nfs4_exception exception = { }; 3537 struct rpc_clnt *client = *clnt; 3538 int err; 3539 do { 3540 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label); 3541 trace_nfs4_lookup(dir, name, err); 3542 switch (err) { 3543 case -NFS4ERR_BADNAME: 3544 err = -ENOENT; 3545 goto out; 3546 case -NFS4ERR_MOVED: 3547 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 3548 if (err == -NFS4ERR_MOVED) 3549 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 3550 goto out; 3551 case -NFS4ERR_WRONGSEC: 3552 err = -EPERM; 3553 if (client != *clnt) 3554 goto out; 3555 client = nfs4_negotiate_security(client, dir, name); 3556 if (IS_ERR(client)) 3557 return PTR_ERR(client); 3558 3559 exception.retry = 1; 3560 break; 3561 default: 3562 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 3563 } 3564 } while (exception.retry); 3565 3566 out: 3567 if (err == 0) 3568 *clnt = client; 3569 else if (client != *clnt) 3570 rpc_shutdown_client(client); 3571 3572 return err; 3573 } 3574 3575 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, 3576 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 3577 struct nfs4_label *label) 3578 { 3579 int status; 3580 struct rpc_clnt *client = NFS_CLIENT(dir); 3581 3582 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label); 3583 if (client != NFS_CLIENT(dir)) { 3584 rpc_shutdown_client(client); 3585 nfs_fixup_secinfo_attributes(fattr); 3586 } 3587 return status; 3588 } 3589 3590 struct rpc_clnt * 3591 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name, 3592 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 3593 { 3594 struct rpc_clnt *client = NFS_CLIENT(dir); 3595 int status; 3596 3597 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL); 3598 if (status < 0) 3599 return ERR_PTR(status); 3600 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 3601 } 3602 3603 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 3604 { 3605 struct nfs_server *server = NFS_SERVER(inode); 3606 struct nfs4_accessargs args = { 3607 .fh = NFS_FH(inode), 3608 .bitmask = server->cache_consistency_bitmask, 3609 }; 3610 struct nfs4_accessres res = { 3611 .server = server, 3612 }; 3613 struct rpc_message msg = { 3614 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 3615 .rpc_argp = &args, 3616 .rpc_resp = &res, 3617 .rpc_cred = entry->cred, 3618 }; 3619 int mode = entry->mask; 3620 int status = 0; 3621 3622 /* 3623 * Determine which access bits we want to ask for... 3624 */ 3625 if (mode & MAY_READ) 3626 args.access |= NFS4_ACCESS_READ; 3627 if (S_ISDIR(inode->i_mode)) { 3628 if (mode & MAY_WRITE) 3629 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; 3630 if (mode & MAY_EXEC) 3631 args.access |= NFS4_ACCESS_LOOKUP; 3632 } else { 3633 if (mode & MAY_WRITE) 3634 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; 3635 if (mode & MAY_EXEC) 3636 args.access |= NFS4_ACCESS_EXECUTE; 3637 } 3638 3639 res.fattr = nfs_alloc_fattr(); 3640 if (res.fattr == NULL) 3641 return -ENOMEM; 3642 3643 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3644 if (!status) { 3645 nfs_access_set_mask(entry, res.access); 3646 nfs_refresh_inode(inode, res.fattr); 3647 } 3648 nfs_free_fattr(res.fattr); 3649 return status; 3650 } 3651 3652 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 3653 { 3654 struct nfs4_exception exception = { }; 3655 int err; 3656 do { 3657 err = _nfs4_proc_access(inode, entry); 3658 trace_nfs4_access(inode, err); 3659 err = nfs4_handle_exception(NFS_SERVER(inode), err, 3660 &exception); 3661 } while (exception.retry); 3662 return err; 3663 } 3664 3665 /* 3666 * TODO: For the time being, we don't try to get any attributes 3667 * along with any of the zero-copy operations READ, READDIR, 3668 * READLINK, WRITE. 3669 * 3670 * In the case of the first three, we want to put the GETATTR 3671 * after the read-type operation -- this is because it is hard 3672 * to predict the length of a GETATTR response in v4, and thus 3673 * align the READ data correctly. This means that the GETATTR 3674 * may end up partially falling into the page cache, and we should 3675 * shift it into the 'tail' of the xdr_buf before processing. 3676 * To do this efficiently, we need to know the total length 3677 * of data received, which doesn't seem to be available outside 3678 * of the RPC layer. 3679 * 3680 * In the case of WRITE, we also want to put the GETATTR after 3681 * the operation -- in this case because we want to make sure 3682 * we get the post-operation mtime and size. 3683 * 3684 * Both of these changes to the XDR layer would in fact be quite 3685 * minor, but I decided to leave them for a subsequent patch. 3686 */ 3687 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 3688 unsigned int pgbase, unsigned int pglen) 3689 { 3690 struct nfs4_readlink args = { 3691 .fh = NFS_FH(inode), 3692 .pgbase = pgbase, 3693 .pglen = pglen, 3694 .pages = &page, 3695 }; 3696 struct nfs4_readlink_res res; 3697 struct rpc_message msg = { 3698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 3699 .rpc_argp = &args, 3700 .rpc_resp = &res, 3701 }; 3702 3703 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 3704 } 3705 3706 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 3707 unsigned int pgbase, unsigned int pglen) 3708 { 3709 struct nfs4_exception exception = { }; 3710 int err; 3711 do { 3712 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 3713 trace_nfs4_readlink(inode, err); 3714 err = nfs4_handle_exception(NFS_SERVER(inode), err, 3715 &exception); 3716 } while (exception.retry); 3717 return err; 3718 } 3719 3720 /* 3721 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 3722 */ 3723 static int 3724 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 3725 int flags) 3726 { 3727 struct nfs4_label l, *ilabel = NULL; 3728 struct nfs_open_context *ctx; 3729 struct nfs4_state *state; 3730 int status = 0; 3731 3732 ctx = alloc_nfs_open_context(dentry, FMODE_READ); 3733 if (IS_ERR(ctx)) 3734 return PTR_ERR(ctx); 3735 3736 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 3737 3738 sattr->ia_mode &= ~current_umask(); 3739 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 3740 if (IS_ERR(state)) { 3741 status = PTR_ERR(state); 3742 goto out; 3743 } 3744 out: 3745 nfs4_label_release_security(ilabel); 3746 put_nfs_open_context(ctx); 3747 return status; 3748 } 3749 3750 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) 3751 { 3752 struct nfs_server *server = NFS_SERVER(dir); 3753 struct nfs_removeargs args = { 3754 .fh = NFS_FH(dir), 3755 .name = *name, 3756 }; 3757 struct nfs_removeres res = { 3758 .server = server, 3759 }; 3760 struct rpc_message msg = { 3761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 3762 .rpc_argp = &args, 3763 .rpc_resp = &res, 3764 }; 3765 int status; 3766 3767 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 3768 if (status == 0) 3769 update_changeattr(dir, &res.cinfo); 3770 return status; 3771 } 3772 3773 static int nfs4_proc_remove(struct inode *dir, struct qstr *name) 3774 { 3775 struct nfs4_exception exception = { }; 3776 int err; 3777 do { 3778 err = _nfs4_proc_remove(dir, name); 3779 trace_nfs4_remove(dir, name, err); 3780 err = nfs4_handle_exception(NFS_SERVER(dir), err, 3781 &exception); 3782 } while (exception.retry); 3783 return err; 3784 } 3785 3786 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 3787 { 3788 struct nfs_server *server = NFS_SERVER(dir); 3789 struct nfs_removeargs *args = msg->rpc_argp; 3790 struct nfs_removeres *res = msg->rpc_resp; 3791 3792 res->server = server; 3793 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 3794 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1); 3795 3796 nfs_fattr_init(res->dir_attr); 3797 } 3798 3799 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 3800 { 3801 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb), 3802 &data->args.seq_args, 3803 &data->res.seq_res, 3804 task); 3805 } 3806 3807 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 3808 { 3809 struct nfs_unlinkdata *data = task->tk_calldata; 3810 struct nfs_removeres *res = &data->res; 3811 3812 if (!nfs4_sequence_done(task, &res->seq_res)) 3813 return 0; 3814 if (nfs4_async_handle_error(task, res->server, NULL, 3815 &data->timeout) == -EAGAIN) 3816 return 0; 3817 update_changeattr(dir, &res->cinfo); 3818 return 1; 3819 } 3820 3821 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir) 3822 { 3823 struct nfs_server *server = NFS_SERVER(dir); 3824 struct nfs_renameargs *arg = msg->rpc_argp; 3825 struct nfs_renameres *res = msg->rpc_resp; 3826 3827 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 3828 res->server = server; 3829 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1); 3830 } 3831 3832 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 3833 { 3834 nfs4_setup_sequence(NFS_SERVER(data->old_dir), 3835 &data->args.seq_args, 3836 &data->res.seq_res, 3837 task); 3838 } 3839 3840 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 3841 struct inode *new_dir) 3842 { 3843 struct nfs_renamedata *data = task->tk_calldata; 3844 struct nfs_renameres *res = &data->res; 3845 3846 if (!nfs4_sequence_done(task, &res->seq_res)) 3847 return 0; 3848 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 3849 return 0; 3850 3851 update_changeattr(old_dir, &res->old_cinfo); 3852 update_changeattr(new_dir, &res->new_cinfo); 3853 return 1; 3854 } 3855 3856 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 3857 { 3858 struct nfs_server *server = NFS_SERVER(inode); 3859 struct nfs4_link_arg arg = { 3860 .fh = NFS_FH(inode), 3861 .dir_fh = NFS_FH(dir), 3862 .name = name, 3863 .bitmask = server->attr_bitmask, 3864 }; 3865 struct nfs4_link_res res = { 3866 .server = server, 3867 .label = NULL, 3868 }; 3869 struct rpc_message msg = { 3870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 3871 .rpc_argp = &arg, 3872 .rpc_resp = &res, 3873 }; 3874 int status = -ENOMEM; 3875 3876 res.fattr = nfs_alloc_fattr(); 3877 if (res.fattr == NULL) 3878 goto out; 3879 3880 res.label = nfs4_label_alloc(server, GFP_KERNEL); 3881 if (IS_ERR(res.label)) { 3882 status = PTR_ERR(res.label); 3883 goto out; 3884 } 3885 arg.bitmask = nfs4_bitmask(server, res.label); 3886 3887 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 3888 if (!status) { 3889 update_changeattr(dir, &res.cinfo); 3890 status = nfs_post_op_update_inode(inode, res.fattr); 3891 if (!status) 3892 nfs_setsecurity(inode, res.fattr, res.label); 3893 } 3894 3895 3896 nfs4_label_free(res.label); 3897 3898 out: 3899 nfs_free_fattr(res.fattr); 3900 return status; 3901 } 3902 3903 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 3904 { 3905 struct nfs4_exception exception = { }; 3906 int err; 3907 do { 3908 err = nfs4_handle_exception(NFS_SERVER(inode), 3909 _nfs4_proc_link(inode, dir, name), 3910 &exception); 3911 } while (exception.retry); 3912 return err; 3913 } 3914 3915 struct nfs4_createdata { 3916 struct rpc_message msg; 3917 struct nfs4_create_arg arg; 3918 struct nfs4_create_res res; 3919 struct nfs_fh fh; 3920 struct nfs_fattr fattr; 3921 struct nfs4_label *label; 3922 }; 3923 3924 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 3925 struct qstr *name, struct iattr *sattr, u32 ftype) 3926 { 3927 struct nfs4_createdata *data; 3928 3929 data = kzalloc(sizeof(*data), GFP_KERNEL); 3930 if (data != NULL) { 3931 struct nfs_server *server = NFS_SERVER(dir); 3932 3933 data->label = nfs4_label_alloc(server, GFP_KERNEL); 3934 if (IS_ERR(data->label)) 3935 goto out_free; 3936 3937 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 3938 data->msg.rpc_argp = &data->arg; 3939 data->msg.rpc_resp = &data->res; 3940 data->arg.dir_fh = NFS_FH(dir); 3941 data->arg.server = server; 3942 data->arg.name = name; 3943 data->arg.attrs = sattr; 3944 data->arg.ftype = ftype; 3945 data->arg.bitmask = nfs4_bitmask(server, data->label); 3946 data->res.server = server; 3947 data->res.fh = &data->fh; 3948 data->res.fattr = &data->fattr; 3949 data->res.label = data->label; 3950 nfs_fattr_init(data->res.fattr); 3951 } 3952 return data; 3953 out_free: 3954 kfree(data); 3955 return NULL; 3956 } 3957 3958 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 3959 { 3960 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 3961 &data->arg.seq_args, &data->res.seq_res, 1); 3962 if (status == 0) { 3963 update_changeattr(dir, &data->res.dir_cinfo); 3964 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); 3965 } 3966 return status; 3967 } 3968 3969 static void nfs4_free_createdata(struct nfs4_createdata *data) 3970 { 3971 nfs4_label_free(data->label); 3972 kfree(data); 3973 } 3974 3975 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 3976 struct page *page, unsigned int len, struct iattr *sattr, 3977 struct nfs4_label *label) 3978 { 3979 struct nfs4_createdata *data; 3980 int status = -ENAMETOOLONG; 3981 3982 if (len > NFS4_MAXPATHLEN) 3983 goto out; 3984 3985 status = -ENOMEM; 3986 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 3987 if (data == NULL) 3988 goto out; 3989 3990 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 3991 data->arg.u.symlink.pages = &page; 3992 data->arg.u.symlink.len = len; 3993 data->arg.label = label; 3994 3995 status = nfs4_do_create(dir, dentry, data); 3996 3997 nfs4_free_createdata(data); 3998 out: 3999 return status; 4000 } 4001 4002 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4003 struct page *page, unsigned int len, struct iattr *sattr) 4004 { 4005 struct nfs4_exception exception = { }; 4006 struct nfs4_label l, *label = NULL; 4007 int err; 4008 4009 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4010 4011 do { 4012 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 4013 trace_nfs4_symlink(dir, &dentry->d_name, err); 4014 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4015 &exception); 4016 } while (exception.retry); 4017 4018 nfs4_label_release_security(label); 4019 return err; 4020 } 4021 4022 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4023 struct iattr *sattr, struct nfs4_label *label) 4024 { 4025 struct nfs4_createdata *data; 4026 int status = -ENOMEM; 4027 4028 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 4029 if (data == NULL) 4030 goto out; 4031 4032 data->arg.label = label; 4033 status = nfs4_do_create(dir, dentry, data); 4034 4035 nfs4_free_createdata(data); 4036 out: 4037 return status; 4038 } 4039 4040 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4041 struct iattr *sattr) 4042 { 4043 struct nfs4_exception exception = { }; 4044 struct nfs4_label l, *label = NULL; 4045 int err; 4046 4047 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4048 4049 sattr->ia_mode &= ~current_umask(); 4050 do { 4051 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 4052 trace_nfs4_mkdir(dir, &dentry->d_name, err); 4053 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4054 &exception); 4055 } while (exception.retry); 4056 nfs4_label_release_security(label); 4057 4058 return err; 4059 } 4060 4061 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 4062 u64 cookie, struct page **pages, unsigned int count, int plus) 4063 { 4064 struct inode *dir = d_inode(dentry); 4065 struct nfs4_readdir_arg args = { 4066 .fh = NFS_FH(dir), 4067 .pages = pages, 4068 .pgbase = 0, 4069 .count = count, 4070 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask, 4071 .plus = plus, 4072 }; 4073 struct nfs4_readdir_res res; 4074 struct rpc_message msg = { 4075 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 4076 .rpc_argp = &args, 4077 .rpc_resp = &res, 4078 .rpc_cred = cred, 4079 }; 4080 int status; 4081 4082 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__, 4083 dentry, 4084 (unsigned long long)cookie); 4085 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); 4086 res.pgbase = args.pgbase; 4087 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); 4088 if (status >= 0) { 4089 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); 4090 status += args.pgbase; 4091 } 4092 4093 nfs_invalidate_atime(dir); 4094 4095 dprintk("%s: returns %d\n", __func__, status); 4096 return status; 4097 } 4098 4099 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 4100 u64 cookie, struct page **pages, unsigned int count, int plus) 4101 { 4102 struct nfs4_exception exception = { }; 4103 int err; 4104 do { 4105 err = _nfs4_proc_readdir(dentry, cred, cookie, 4106 pages, count, plus); 4107 trace_nfs4_readdir(d_inode(dentry), err); 4108 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err, 4109 &exception); 4110 } while (exception.retry); 4111 return err; 4112 } 4113 4114 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 4115 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 4116 { 4117 struct nfs4_createdata *data; 4118 int mode = sattr->ia_mode; 4119 int status = -ENOMEM; 4120 4121 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 4122 if (data == NULL) 4123 goto out; 4124 4125 if (S_ISFIFO(mode)) 4126 data->arg.ftype = NF4FIFO; 4127 else if (S_ISBLK(mode)) { 4128 data->arg.ftype = NF4BLK; 4129 data->arg.u.device.specdata1 = MAJOR(rdev); 4130 data->arg.u.device.specdata2 = MINOR(rdev); 4131 } 4132 else if (S_ISCHR(mode)) { 4133 data->arg.ftype = NF4CHR; 4134 data->arg.u.device.specdata1 = MAJOR(rdev); 4135 data->arg.u.device.specdata2 = MINOR(rdev); 4136 } else if (!S_ISSOCK(mode)) { 4137 status = -EINVAL; 4138 goto out_free; 4139 } 4140 4141 data->arg.label = label; 4142 status = nfs4_do_create(dir, dentry, data); 4143 out_free: 4144 nfs4_free_createdata(data); 4145 out: 4146 return status; 4147 } 4148 4149 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 4150 struct iattr *sattr, dev_t rdev) 4151 { 4152 struct nfs4_exception exception = { }; 4153 struct nfs4_label l, *label = NULL; 4154 int err; 4155 4156 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4157 4158 sattr->ia_mode &= ~current_umask(); 4159 do { 4160 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 4161 trace_nfs4_mknod(dir, &dentry->d_name, err); 4162 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4163 &exception); 4164 } while (exception.retry); 4165 4166 nfs4_label_release_security(label); 4167 4168 return err; 4169 } 4170 4171 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 4172 struct nfs_fsstat *fsstat) 4173 { 4174 struct nfs4_statfs_arg args = { 4175 .fh = fhandle, 4176 .bitmask = server->attr_bitmask, 4177 }; 4178 struct nfs4_statfs_res res = { 4179 .fsstat = fsstat, 4180 }; 4181 struct rpc_message msg = { 4182 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 4183 .rpc_argp = &args, 4184 .rpc_resp = &res, 4185 }; 4186 4187 nfs_fattr_init(fsstat->fattr); 4188 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4189 } 4190 4191 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 4192 { 4193 struct nfs4_exception exception = { }; 4194 int err; 4195 do { 4196 err = nfs4_handle_exception(server, 4197 _nfs4_proc_statfs(server, fhandle, fsstat), 4198 &exception); 4199 } while (exception.retry); 4200 return err; 4201 } 4202 4203 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 4204 struct nfs_fsinfo *fsinfo) 4205 { 4206 struct nfs4_fsinfo_arg args = { 4207 .fh = fhandle, 4208 .bitmask = server->attr_bitmask, 4209 }; 4210 struct nfs4_fsinfo_res res = { 4211 .fsinfo = fsinfo, 4212 }; 4213 struct rpc_message msg = { 4214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 4215 .rpc_argp = &args, 4216 .rpc_resp = &res, 4217 }; 4218 4219 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4220 } 4221 4222 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 4223 { 4224 struct nfs4_exception exception = { }; 4225 unsigned long now = jiffies; 4226 int err; 4227 4228 do { 4229 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 4230 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 4231 if (err == 0) { 4232 struct nfs_client *clp = server->nfs_client; 4233 4234 spin_lock(&clp->cl_lock); 4235 clp->cl_lease_time = fsinfo->lease_time * HZ; 4236 clp->cl_last_renewal = now; 4237 spin_unlock(&clp->cl_lock); 4238 break; 4239 } 4240 err = nfs4_handle_exception(server, err, &exception); 4241 } while (exception.retry); 4242 return err; 4243 } 4244 4245 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 4246 { 4247 int error; 4248 4249 nfs_fattr_init(fsinfo->fattr); 4250 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 4251 if (error == 0) { 4252 /* block layout checks this! */ 4253 server->pnfs_blksize = fsinfo->blksize; 4254 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype); 4255 } 4256 4257 return error; 4258 } 4259 4260 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 4261 struct nfs_pathconf *pathconf) 4262 { 4263 struct nfs4_pathconf_arg args = { 4264 .fh = fhandle, 4265 .bitmask = server->attr_bitmask, 4266 }; 4267 struct nfs4_pathconf_res res = { 4268 .pathconf = pathconf, 4269 }; 4270 struct rpc_message msg = { 4271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 4272 .rpc_argp = &args, 4273 .rpc_resp = &res, 4274 }; 4275 4276 /* None of the pathconf attributes are mandatory to implement */ 4277 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 4278 memset(pathconf, 0, sizeof(*pathconf)); 4279 return 0; 4280 } 4281 4282 nfs_fattr_init(pathconf->fattr); 4283 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4284 } 4285 4286 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 4287 struct nfs_pathconf *pathconf) 4288 { 4289 struct nfs4_exception exception = { }; 4290 int err; 4291 4292 do { 4293 err = nfs4_handle_exception(server, 4294 _nfs4_proc_pathconf(server, fhandle, pathconf), 4295 &exception); 4296 } while (exception.retry); 4297 return err; 4298 } 4299 4300 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 4301 const struct nfs_open_context *ctx, 4302 const struct nfs_lock_context *l_ctx, 4303 fmode_t fmode) 4304 { 4305 const struct nfs_lockowner *lockowner = NULL; 4306 4307 if (l_ctx != NULL) 4308 lockowner = &l_ctx->lockowner; 4309 return nfs4_select_rw_stateid(ctx->state, fmode, lockowner, stateid, NULL); 4310 } 4311 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 4312 4313 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 4314 const struct nfs_open_context *ctx, 4315 const struct nfs_lock_context *l_ctx, 4316 fmode_t fmode) 4317 { 4318 nfs4_stateid current_stateid; 4319 4320 /* If the current stateid represents a lost lock, then exit */ 4321 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO) 4322 return true; 4323 return nfs4_stateid_match(stateid, ¤t_stateid); 4324 } 4325 4326 static bool nfs4_error_stateid_expired(int err) 4327 { 4328 switch (err) { 4329 case -NFS4ERR_DELEG_REVOKED: 4330 case -NFS4ERR_ADMIN_REVOKED: 4331 case -NFS4ERR_BAD_STATEID: 4332 case -NFS4ERR_STALE_STATEID: 4333 case -NFS4ERR_OLD_STATEID: 4334 case -NFS4ERR_OPENMODE: 4335 case -NFS4ERR_EXPIRED: 4336 return true; 4337 } 4338 return false; 4339 } 4340 4341 void __nfs4_read_done_cb(struct nfs_pgio_header *hdr) 4342 { 4343 nfs_invalidate_atime(hdr->inode); 4344 } 4345 4346 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 4347 { 4348 struct nfs_server *server = NFS_SERVER(hdr->inode); 4349 4350 trace_nfs4_read(hdr, task->tk_status); 4351 if (nfs4_async_handle_error(task, server, 4352 hdr->args.context->state, 4353 NULL) == -EAGAIN) { 4354 rpc_restart_call_prepare(task); 4355 return -EAGAIN; 4356 } 4357 4358 __nfs4_read_done_cb(hdr); 4359 if (task->tk_status > 0) 4360 renew_lease(server, hdr->timestamp); 4361 return 0; 4362 } 4363 4364 static bool nfs4_read_stateid_changed(struct rpc_task *task, 4365 struct nfs_pgio_args *args) 4366 { 4367 4368 if (!nfs4_error_stateid_expired(task->tk_status) || 4369 nfs4_stateid_is_current(&args->stateid, 4370 args->context, 4371 args->lock_context, 4372 FMODE_READ)) 4373 return false; 4374 rpc_restart_call_prepare(task); 4375 return true; 4376 } 4377 4378 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 4379 { 4380 4381 dprintk("--> %s\n", __func__); 4382 4383 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 4384 return -EAGAIN; 4385 if (nfs4_read_stateid_changed(task, &hdr->args)) 4386 return -EAGAIN; 4387 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 4388 nfs4_read_done_cb(task, hdr); 4389 } 4390 4391 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 4392 struct rpc_message *msg) 4393 { 4394 hdr->timestamp = jiffies; 4395 hdr->pgio_done_cb = nfs4_read_done_cb; 4396 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 4397 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0); 4398 } 4399 4400 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 4401 struct nfs_pgio_header *hdr) 4402 { 4403 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode), 4404 &hdr->args.seq_args, 4405 &hdr->res.seq_res, 4406 task)) 4407 return 0; 4408 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 4409 hdr->args.lock_context, 4410 hdr->rw_ops->rw_mode) == -EIO) 4411 return -EIO; 4412 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 4413 return -EIO; 4414 return 0; 4415 } 4416 4417 static int nfs4_write_done_cb(struct rpc_task *task, 4418 struct nfs_pgio_header *hdr) 4419 { 4420 struct inode *inode = hdr->inode; 4421 4422 trace_nfs4_write(hdr, task->tk_status); 4423 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 4424 hdr->args.context->state, 4425 NULL) == -EAGAIN) { 4426 rpc_restart_call_prepare(task); 4427 return -EAGAIN; 4428 } 4429 if (task->tk_status >= 0) { 4430 renew_lease(NFS_SERVER(inode), hdr->timestamp); 4431 nfs_writeback_update_inode(hdr); 4432 } 4433 return 0; 4434 } 4435 4436 static bool nfs4_write_stateid_changed(struct rpc_task *task, 4437 struct nfs_pgio_args *args) 4438 { 4439 4440 if (!nfs4_error_stateid_expired(task->tk_status) || 4441 nfs4_stateid_is_current(&args->stateid, 4442 args->context, 4443 args->lock_context, 4444 FMODE_WRITE)) 4445 return false; 4446 rpc_restart_call_prepare(task); 4447 return true; 4448 } 4449 4450 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 4451 { 4452 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 4453 return -EAGAIN; 4454 if (nfs4_write_stateid_changed(task, &hdr->args)) 4455 return -EAGAIN; 4456 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 4457 nfs4_write_done_cb(task, hdr); 4458 } 4459 4460 static 4461 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 4462 { 4463 /* Don't request attributes for pNFS or O_DIRECT writes */ 4464 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 4465 return false; 4466 /* Otherwise, request attributes if and only if we don't hold 4467 * a delegation 4468 */ 4469 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 4470 } 4471 4472 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 4473 struct rpc_message *msg) 4474 { 4475 struct nfs_server *server = NFS_SERVER(hdr->inode); 4476 4477 if (!nfs4_write_need_cache_consistency_data(hdr)) { 4478 hdr->args.bitmask = NULL; 4479 hdr->res.fattr = NULL; 4480 } else 4481 hdr->args.bitmask = server->cache_consistency_bitmask; 4482 4483 if (!hdr->pgio_done_cb) 4484 hdr->pgio_done_cb = nfs4_write_done_cb; 4485 hdr->res.server = server; 4486 hdr->timestamp = jiffies; 4487 4488 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 4489 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1); 4490 } 4491 4492 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 4493 { 4494 nfs4_setup_sequence(NFS_SERVER(data->inode), 4495 &data->args.seq_args, 4496 &data->res.seq_res, 4497 task); 4498 } 4499 4500 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 4501 { 4502 struct inode *inode = data->inode; 4503 4504 trace_nfs4_commit(data, task->tk_status); 4505 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 4506 NULL, NULL) == -EAGAIN) { 4507 rpc_restart_call_prepare(task); 4508 return -EAGAIN; 4509 } 4510 return 0; 4511 } 4512 4513 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 4514 { 4515 if (!nfs4_sequence_done(task, &data->res.seq_res)) 4516 return -EAGAIN; 4517 return data->commit_done_cb(task, data); 4518 } 4519 4520 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) 4521 { 4522 struct nfs_server *server = NFS_SERVER(data->inode); 4523 4524 if (data->commit_done_cb == NULL) 4525 data->commit_done_cb = nfs4_commit_done_cb; 4526 data->res.server = server; 4527 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 4528 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 4529 } 4530 4531 struct nfs4_renewdata { 4532 struct nfs_client *client; 4533 unsigned long timestamp; 4534 }; 4535 4536 /* 4537 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 4538 * standalone procedure for queueing an asynchronous RENEW. 4539 */ 4540 static void nfs4_renew_release(void *calldata) 4541 { 4542 struct nfs4_renewdata *data = calldata; 4543 struct nfs_client *clp = data->client; 4544 4545 if (atomic_read(&clp->cl_count) > 1) 4546 nfs4_schedule_state_renewal(clp); 4547 nfs_put_client(clp); 4548 kfree(data); 4549 } 4550 4551 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 4552 { 4553 struct nfs4_renewdata *data = calldata; 4554 struct nfs_client *clp = data->client; 4555 unsigned long timestamp = data->timestamp; 4556 4557 trace_nfs4_renew_async(clp, task->tk_status); 4558 switch (task->tk_status) { 4559 case 0: 4560 break; 4561 case -NFS4ERR_LEASE_MOVED: 4562 nfs4_schedule_lease_moved_recovery(clp); 4563 break; 4564 default: 4565 /* Unless we're shutting down, schedule state recovery! */ 4566 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 4567 return; 4568 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 4569 nfs4_schedule_lease_recovery(clp); 4570 return; 4571 } 4572 nfs4_schedule_path_down_recovery(clp); 4573 } 4574 do_renew_lease(clp, timestamp); 4575 } 4576 4577 static const struct rpc_call_ops nfs4_renew_ops = { 4578 .rpc_call_done = nfs4_renew_done, 4579 .rpc_release = nfs4_renew_release, 4580 }; 4581 4582 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) 4583 { 4584 struct rpc_message msg = { 4585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 4586 .rpc_argp = clp, 4587 .rpc_cred = cred, 4588 }; 4589 struct nfs4_renewdata *data; 4590 4591 if (renew_flags == 0) 4592 return 0; 4593 if (!atomic_inc_not_zero(&clp->cl_count)) 4594 return -EIO; 4595 data = kmalloc(sizeof(*data), GFP_NOFS); 4596 if (data == NULL) 4597 return -ENOMEM; 4598 data->client = clp; 4599 data->timestamp = jiffies; 4600 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 4601 &nfs4_renew_ops, data); 4602 } 4603 4604 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) 4605 { 4606 struct rpc_message msg = { 4607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 4608 .rpc_argp = clp, 4609 .rpc_cred = cred, 4610 }; 4611 unsigned long now = jiffies; 4612 int status; 4613 4614 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 4615 if (status < 0) 4616 return status; 4617 do_renew_lease(clp, now); 4618 return 0; 4619 } 4620 4621 static inline int nfs4_server_supports_acls(struct nfs_server *server) 4622 { 4623 return server->caps & NFS_CAP_ACLS; 4624 } 4625 4626 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 4627 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 4628 * the stack. 4629 */ 4630 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 4631 4632 static int buf_to_pages_noslab(const void *buf, size_t buflen, 4633 struct page **pages) 4634 { 4635 struct page *newpage, **spages; 4636 int rc = 0; 4637 size_t len; 4638 spages = pages; 4639 4640 do { 4641 len = min_t(size_t, PAGE_SIZE, buflen); 4642 newpage = alloc_page(GFP_KERNEL); 4643 4644 if (newpage == NULL) 4645 goto unwind; 4646 memcpy(page_address(newpage), buf, len); 4647 buf += len; 4648 buflen -= len; 4649 *pages++ = newpage; 4650 rc++; 4651 } while (buflen != 0); 4652 4653 return rc; 4654 4655 unwind: 4656 for(; rc > 0; rc--) 4657 __free_page(spages[rc-1]); 4658 return -ENOMEM; 4659 } 4660 4661 struct nfs4_cached_acl { 4662 int cached; 4663 size_t len; 4664 char data[0]; 4665 }; 4666 4667 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 4668 { 4669 struct nfs_inode *nfsi = NFS_I(inode); 4670 4671 spin_lock(&inode->i_lock); 4672 kfree(nfsi->nfs4_acl); 4673 nfsi->nfs4_acl = acl; 4674 spin_unlock(&inode->i_lock); 4675 } 4676 4677 static void nfs4_zap_acl_attr(struct inode *inode) 4678 { 4679 nfs4_set_cached_acl(inode, NULL); 4680 } 4681 4682 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 4683 { 4684 struct nfs_inode *nfsi = NFS_I(inode); 4685 struct nfs4_cached_acl *acl; 4686 int ret = -ENOENT; 4687 4688 spin_lock(&inode->i_lock); 4689 acl = nfsi->nfs4_acl; 4690 if (acl == NULL) 4691 goto out; 4692 if (buf == NULL) /* user is just asking for length */ 4693 goto out_len; 4694 if (acl->cached == 0) 4695 goto out; 4696 ret = -ERANGE; /* see getxattr(2) man page */ 4697 if (acl->len > buflen) 4698 goto out; 4699 memcpy(buf, acl->data, acl->len); 4700 out_len: 4701 ret = acl->len; 4702 out: 4703 spin_unlock(&inode->i_lock); 4704 return ret; 4705 } 4706 4707 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 4708 { 4709 struct nfs4_cached_acl *acl; 4710 size_t buflen = sizeof(*acl) + acl_len; 4711 4712 if (buflen <= PAGE_SIZE) { 4713 acl = kmalloc(buflen, GFP_KERNEL); 4714 if (acl == NULL) 4715 goto out; 4716 acl->cached = 1; 4717 _copy_from_pages(acl->data, pages, pgbase, acl_len); 4718 } else { 4719 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 4720 if (acl == NULL) 4721 goto out; 4722 acl->cached = 0; 4723 } 4724 acl->len = acl_len; 4725 out: 4726 nfs4_set_cached_acl(inode, acl); 4727 } 4728 4729 /* 4730 * The getxattr API returns the required buffer length when called with a 4731 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 4732 * the required buf. On a NULL buf, we send a page of data to the server 4733 * guessing that the ACL request can be serviced by a page. If so, we cache 4734 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 4735 * the cache. If not so, we throw away the page, and cache the required 4736 * length. The next getxattr call will then produce another round trip to 4737 * the server, this time with the input buf of the required size. 4738 */ 4739 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 4740 { 4741 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, }; 4742 struct nfs_getaclargs args = { 4743 .fh = NFS_FH(inode), 4744 .acl_pages = pages, 4745 .acl_len = buflen, 4746 }; 4747 struct nfs_getaclres res = { 4748 .acl_len = buflen, 4749 }; 4750 struct rpc_message msg = { 4751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 4752 .rpc_argp = &args, 4753 .rpc_resp = &res, 4754 }; 4755 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 4756 int ret = -ENOMEM, i; 4757 4758 /* As long as we're doing a round trip to the server anyway, 4759 * let's be prepared for a page of acl data. */ 4760 if (npages == 0) 4761 npages = 1; 4762 if (npages > ARRAY_SIZE(pages)) 4763 return -ERANGE; 4764 4765 for (i = 0; i < npages; i++) { 4766 pages[i] = alloc_page(GFP_KERNEL); 4767 if (!pages[i]) 4768 goto out_free; 4769 } 4770 4771 /* for decoding across pages */ 4772 res.acl_scratch = alloc_page(GFP_KERNEL); 4773 if (!res.acl_scratch) 4774 goto out_free; 4775 4776 args.acl_len = npages * PAGE_SIZE; 4777 4778 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 4779 __func__, buf, buflen, npages, args.acl_len); 4780 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 4781 &msg, &args.seq_args, &res.seq_res, 0); 4782 if (ret) 4783 goto out_free; 4784 4785 /* Handle the case where the passed-in buffer is too short */ 4786 if (res.acl_flags & NFS4_ACL_TRUNC) { 4787 /* Did the user only issue a request for the acl length? */ 4788 if (buf == NULL) 4789 goto out_ok; 4790 ret = -ERANGE; 4791 goto out_free; 4792 } 4793 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 4794 if (buf) { 4795 if (res.acl_len > buflen) { 4796 ret = -ERANGE; 4797 goto out_free; 4798 } 4799 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 4800 } 4801 out_ok: 4802 ret = res.acl_len; 4803 out_free: 4804 for (i = 0; i < npages; i++) 4805 if (pages[i]) 4806 __free_page(pages[i]); 4807 if (res.acl_scratch) 4808 __free_page(res.acl_scratch); 4809 return ret; 4810 } 4811 4812 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 4813 { 4814 struct nfs4_exception exception = { }; 4815 ssize_t ret; 4816 do { 4817 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 4818 trace_nfs4_get_acl(inode, ret); 4819 if (ret >= 0) 4820 break; 4821 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 4822 } while (exception.retry); 4823 return ret; 4824 } 4825 4826 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 4827 { 4828 struct nfs_server *server = NFS_SERVER(inode); 4829 int ret; 4830 4831 if (!nfs4_server_supports_acls(server)) 4832 return -EOPNOTSUPP; 4833 ret = nfs_revalidate_inode(server, inode); 4834 if (ret < 0) 4835 return ret; 4836 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 4837 nfs_zap_acl_cache(inode); 4838 ret = nfs4_read_cached_acl(inode, buf, buflen); 4839 if (ret != -ENOENT) 4840 /* -ENOENT is returned if there is no ACL or if there is an ACL 4841 * but no cached acl data, just the acl length */ 4842 return ret; 4843 return nfs4_get_acl_uncached(inode, buf, buflen); 4844 } 4845 4846 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 4847 { 4848 struct nfs_server *server = NFS_SERVER(inode); 4849 struct page *pages[NFS4ACL_MAXPAGES]; 4850 struct nfs_setaclargs arg = { 4851 .fh = NFS_FH(inode), 4852 .acl_pages = pages, 4853 .acl_len = buflen, 4854 }; 4855 struct nfs_setaclres res; 4856 struct rpc_message msg = { 4857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 4858 .rpc_argp = &arg, 4859 .rpc_resp = &res, 4860 }; 4861 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 4862 int ret, i; 4863 4864 if (!nfs4_server_supports_acls(server)) 4865 return -EOPNOTSUPP; 4866 if (npages > ARRAY_SIZE(pages)) 4867 return -ERANGE; 4868 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages); 4869 if (i < 0) 4870 return i; 4871 nfs4_inode_return_delegation(inode); 4872 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4873 4874 /* 4875 * Free each page after tx, so the only ref left is 4876 * held by the network stack 4877 */ 4878 for (; i > 0; i--) 4879 put_page(pages[i-1]); 4880 4881 /* 4882 * Acl update can result in inode attribute update. 4883 * so mark the attribute cache invalid. 4884 */ 4885 spin_lock(&inode->i_lock); 4886 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; 4887 spin_unlock(&inode->i_lock); 4888 nfs_access_zap_cache(inode); 4889 nfs_zap_acl_cache(inode); 4890 return ret; 4891 } 4892 4893 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 4894 { 4895 struct nfs4_exception exception = { }; 4896 int err; 4897 do { 4898 err = __nfs4_proc_set_acl(inode, buf, buflen); 4899 trace_nfs4_set_acl(inode, err); 4900 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4901 &exception); 4902 } while (exception.retry); 4903 return err; 4904 } 4905 4906 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 4907 static int _nfs4_get_security_label(struct inode *inode, void *buf, 4908 size_t buflen) 4909 { 4910 struct nfs_server *server = NFS_SERVER(inode); 4911 struct nfs_fattr fattr; 4912 struct nfs4_label label = {0, 0, buflen, buf}; 4913 4914 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 4915 struct nfs4_getattr_arg arg = { 4916 .fh = NFS_FH(inode), 4917 .bitmask = bitmask, 4918 }; 4919 struct nfs4_getattr_res res = { 4920 .fattr = &fattr, 4921 .label = &label, 4922 .server = server, 4923 }; 4924 struct rpc_message msg = { 4925 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4926 .rpc_argp = &arg, 4927 .rpc_resp = &res, 4928 }; 4929 int ret; 4930 4931 nfs_fattr_init(&fattr); 4932 4933 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 4934 if (ret) 4935 return ret; 4936 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 4937 return -ENOENT; 4938 if (buflen < label.len) 4939 return -ERANGE; 4940 return 0; 4941 } 4942 4943 static int nfs4_get_security_label(struct inode *inode, void *buf, 4944 size_t buflen) 4945 { 4946 struct nfs4_exception exception = { }; 4947 int err; 4948 4949 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 4950 return -EOPNOTSUPP; 4951 4952 do { 4953 err = _nfs4_get_security_label(inode, buf, buflen); 4954 trace_nfs4_get_security_label(inode, err); 4955 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4956 &exception); 4957 } while (exception.retry); 4958 return err; 4959 } 4960 4961 static int _nfs4_do_set_security_label(struct inode *inode, 4962 struct nfs4_label *ilabel, 4963 struct nfs_fattr *fattr, 4964 struct nfs4_label *olabel) 4965 { 4966 4967 struct iattr sattr = {0}; 4968 struct nfs_server *server = NFS_SERVER(inode); 4969 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 4970 struct nfs_setattrargs arg = { 4971 .fh = NFS_FH(inode), 4972 .iap = &sattr, 4973 .server = server, 4974 .bitmask = bitmask, 4975 .label = ilabel, 4976 }; 4977 struct nfs_setattrres res = { 4978 .fattr = fattr, 4979 .label = olabel, 4980 .server = server, 4981 }; 4982 struct rpc_message msg = { 4983 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 4984 .rpc_argp = &arg, 4985 .rpc_resp = &res, 4986 }; 4987 int status; 4988 4989 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 4990 4991 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4992 if (status) 4993 dprintk("%s failed: %d\n", __func__, status); 4994 4995 return status; 4996 } 4997 4998 static int nfs4_do_set_security_label(struct inode *inode, 4999 struct nfs4_label *ilabel, 5000 struct nfs_fattr *fattr, 5001 struct nfs4_label *olabel) 5002 { 5003 struct nfs4_exception exception = { }; 5004 int err; 5005 5006 do { 5007 err = _nfs4_do_set_security_label(inode, ilabel, 5008 fattr, olabel); 5009 trace_nfs4_set_security_label(inode, err); 5010 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5011 &exception); 5012 } while (exception.retry); 5013 return err; 5014 } 5015 5016 static int 5017 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 5018 { 5019 struct nfs4_label ilabel, *olabel = NULL; 5020 struct nfs_fattr fattr; 5021 struct rpc_cred *cred; 5022 int status; 5023 5024 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 5025 return -EOPNOTSUPP; 5026 5027 nfs_fattr_init(&fattr); 5028 5029 ilabel.pi = 0; 5030 ilabel.lfs = 0; 5031 ilabel.label = (char *)buf; 5032 ilabel.len = buflen; 5033 5034 cred = rpc_lookup_cred(); 5035 if (IS_ERR(cred)) 5036 return PTR_ERR(cred); 5037 5038 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 5039 if (IS_ERR(olabel)) { 5040 status = -PTR_ERR(olabel); 5041 goto out; 5042 } 5043 5044 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); 5045 if (status == 0) 5046 nfs_setsecurity(inode, &fattr, olabel); 5047 5048 nfs4_label_free(olabel); 5049 out: 5050 put_rpccred(cred); 5051 return status; 5052 } 5053 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 5054 5055 5056 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 5057 nfs4_verifier *bootverf) 5058 { 5059 __be32 verf[2]; 5060 5061 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 5062 /* An impossible timestamp guarantees this value 5063 * will never match a generated boot time. */ 5064 verf[0] = 0; 5065 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1); 5066 } else { 5067 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 5068 verf[0] = cpu_to_be32(nn->boot_time.tv_sec); 5069 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec); 5070 } 5071 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 5072 } 5073 5074 static int 5075 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 5076 { 5077 size_t len; 5078 char *str; 5079 5080 if (clp->cl_owner_id != NULL) 5081 return 0; 5082 5083 rcu_read_lock(); 5084 len = 14 + strlen(clp->cl_ipaddr) + 1 + 5085 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 5086 1 + 5087 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) + 5088 1; 5089 rcu_read_unlock(); 5090 5091 if (len > NFS4_OPAQUE_LIMIT + 1) 5092 return -EINVAL; 5093 5094 /* 5095 * Since this string is allocated at mount time, and held until the 5096 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5097 * about a memory-reclaim deadlock. 5098 */ 5099 str = kmalloc(len, GFP_KERNEL); 5100 if (!str) 5101 return -ENOMEM; 5102 5103 rcu_read_lock(); 5104 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s", 5105 clp->cl_ipaddr, 5106 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR), 5107 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)); 5108 rcu_read_unlock(); 5109 5110 clp->cl_owner_id = str; 5111 return 0; 5112 } 5113 5114 static int 5115 nfs4_init_uniquifier_client_string(struct nfs_client *clp) 5116 { 5117 size_t len; 5118 char *str; 5119 5120 len = 10 + 10 + 1 + 10 + 1 + 5121 strlen(nfs4_client_id_uniquifier) + 1 + 5122 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5123 5124 if (len > NFS4_OPAQUE_LIMIT + 1) 5125 return -EINVAL; 5126 5127 /* 5128 * Since this string is allocated at mount time, and held until the 5129 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5130 * about a memory-reclaim deadlock. 5131 */ 5132 str = kmalloc(len, GFP_KERNEL); 5133 if (!str) 5134 return -ENOMEM; 5135 5136 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 5137 clp->rpc_ops->version, clp->cl_minorversion, 5138 nfs4_client_id_uniquifier, 5139 clp->cl_rpcclient->cl_nodename); 5140 clp->cl_owner_id = str; 5141 return 0; 5142 } 5143 5144 static int 5145 nfs4_init_uniform_client_string(struct nfs_client *clp) 5146 { 5147 size_t len; 5148 char *str; 5149 5150 if (clp->cl_owner_id != NULL) 5151 return 0; 5152 5153 if (nfs4_client_id_uniquifier[0] != '\0') 5154 return nfs4_init_uniquifier_client_string(clp); 5155 5156 len = 10 + 10 + 1 + 10 + 1 + 5157 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5158 5159 if (len > NFS4_OPAQUE_LIMIT + 1) 5160 return -EINVAL; 5161 5162 /* 5163 * Since this string is allocated at mount time, and held until the 5164 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5165 * about a memory-reclaim deadlock. 5166 */ 5167 str = kmalloc(len, GFP_KERNEL); 5168 if (!str) 5169 return -ENOMEM; 5170 5171 scnprintf(str, len, "Linux NFSv%u.%u %s", 5172 clp->rpc_ops->version, clp->cl_minorversion, 5173 clp->cl_rpcclient->cl_nodename); 5174 clp->cl_owner_id = str; 5175 return 0; 5176 } 5177 5178 /* 5179 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 5180 * services. Advertise one based on the address family of the 5181 * clientaddr. 5182 */ 5183 static unsigned int 5184 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 5185 { 5186 if (strchr(clp->cl_ipaddr, ':') != NULL) 5187 return scnprintf(buf, len, "tcp6"); 5188 else 5189 return scnprintf(buf, len, "tcp"); 5190 } 5191 5192 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 5193 { 5194 struct nfs4_setclientid *sc = calldata; 5195 5196 if (task->tk_status == 0) 5197 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 5198 } 5199 5200 static const struct rpc_call_ops nfs4_setclientid_ops = { 5201 .rpc_call_done = nfs4_setclientid_done, 5202 }; 5203 5204 /** 5205 * nfs4_proc_setclientid - Negotiate client ID 5206 * @clp: state data structure 5207 * @program: RPC program for NFSv4 callback service 5208 * @port: IP port number for NFS4 callback service 5209 * @cred: RPC credential to use for this call 5210 * @res: where to place the result 5211 * 5212 * Returns zero, a negative errno, or a negative NFS4ERR status code. 5213 */ 5214 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 5215 unsigned short port, struct rpc_cred *cred, 5216 struct nfs4_setclientid_res *res) 5217 { 5218 nfs4_verifier sc_verifier; 5219 struct nfs4_setclientid setclientid = { 5220 .sc_verifier = &sc_verifier, 5221 .sc_prog = program, 5222 .sc_clnt = clp, 5223 }; 5224 struct rpc_message msg = { 5225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 5226 .rpc_argp = &setclientid, 5227 .rpc_resp = res, 5228 .rpc_cred = cred, 5229 }; 5230 struct rpc_task *task; 5231 struct rpc_task_setup task_setup_data = { 5232 .rpc_client = clp->cl_rpcclient, 5233 .rpc_message = &msg, 5234 .callback_ops = &nfs4_setclientid_ops, 5235 .callback_data = &setclientid, 5236 .flags = RPC_TASK_TIMEOUT, 5237 }; 5238 int status; 5239 5240 /* nfs_client_id4 */ 5241 nfs4_init_boot_verifier(clp, &sc_verifier); 5242 5243 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 5244 status = nfs4_init_uniform_client_string(clp); 5245 else 5246 status = nfs4_init_nonuniform_client_string(clp); 5247 5248 if (status) 5249 goto out; 5250 5251 /* cb_client4 */ 5252 setclientid.sc_netid_len = 5253 nfs4_init_callback_netid(clp, 5254 setclientid.sc_netid, 5255 sizeof(setclientid.sc_netid)); 5256 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 5257 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 5258 clp->cl_ipaddr, port >> 8, port & 255); 5259 5260 dprintk("NFS call setclientid auth=%s, '%s'\n", 5261 clp->cl_rpcclient->cl_auth->au_ops->au_name, 5262 clp->cl_owner_id); 5263 task = rpc_run_task(&task_setup_data); 5264 if (IS_ERR(task)) { 5265 status = PTR_ERR(task); 5266 goto out; 5267 } 5268 status = task->tk_status; 5269 if (setclientid.sc_cred) { 5270 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 5271 put_rpccred(setclientid.sc_cred); 5272 } 5273 rpc_put_task(task); 5274 out: 5275 trace_nfs4_setclientid(clp, status); 5276 dprintk("NFS reply setclientid: %d\n", status); 5277 return status; 5278 } 5279 5280 /** 5281 * nfs4_proc_setclientid_confirm - Confirm client ID 5282 * @clp: state data structure 5283 * @res: result of a previous SETCLIENTID 5284 * @cred: RPC credential to use for this call 5285 * 5286 * Returns zero, a negative errno, or a negative NFS4ERR status code. 5287 */ 5288 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 5289 struct nfs4_setclientid_res *arg, 5290 struct rpc_cred *cred) 5291 { 5292 struct rpc_message msg = { 5293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 5294 .rpc_argp = arg, 5295 .rpc_cred = cred, 5296 }; 5297 int status; 5298 5299 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 5300 clp->cl_rpcclient->cl_auth->au_ops->au_name, 5301 clp->cl_clientid); 5302 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5303 trace_nfs4_setclientid_confirm(clp, status); 5304 dprintk("NFS reply setclientid_confirm: %d\n", status); 5305 return status; 5306 } 5307 5308 struct nfs4_delegreturndata { 5309 struct nfs4_delegreturnargs args; 5310 struct nfs4_delegreturnres res; 5311 struct nfs_fh fh; 5312 nfs4_stateid stateid; 5313 unsigned long timestamp; 5314 struct nfs_fattr fattr; 5315 int rpc_status; 5316 struct inode *inode; 5317 bool roc; 5318 u32 roc_barrier; 5319 }; 5320 5321 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 5322 { 5323 struct nfs4_delegreturndata *data = calldata; 5324 5325 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5326 return; 5327 5328 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 5329 switch (task->tk_status) { 5330 case 0: 5331 renew_lease(data->res.server, data->timestamp); 5332 case -NFS4ERR_ADMIN_REVOKED: 5333 case -NFS4ERR_DELEG_REVOKED: 5334 case -NFS4ERR_BAD_STATEID: 5335 case -NFS4ERR_OLD_STATEID: 5336 case -NFS4ERR_STALE_STATEID: 5337 case -NFS4ERR_EXPIRED: 5338 task->tk_status = 0; 5339 if (data->roc) 5340 pnfs_roc_set_barrier(data->inode, data->roc_barrier); 5341 break; 5342 default: 5343 if (nfs4_async_handle_error(task, data->res.server, 5344 NULL, NULL) == -EAGAIN) { 5345 rpc_restart_call_prepare(task); 5346 return; 5347 } 5348 } 5349 data->rpc_status = task->tk_status; 5350 } 5351 5352 static void nfs4_delegreturn_release(void *calldata) 5353 { 5354 struct nfs4_delegreturndata *data = calldata; 5355 struct inode *inode = data->inode; 5356 5357 if (inode) { 5358 if (data->roc) 5359 pnfs_roc_release(inode); 5360 nfs_iput_and_deactive(inode); 5361 } 5362 kfree(calldata); 5363 } 5364 5365 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 5366 { 5367 struct nfs4_delegreturndata *d_data; 5368 5369 d_data = (struct nfs4_delegreturndata *)data; 5370 5371 if (nfs4_wait_on_layoutreturn(d_data->inode, task)) 5372 return; 5373 5374 if (d_data->roc) 5375 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier); 5376 5377 nfs4_setup_sequence(d_data->res.server, 5378 &d_data->args.seq_args, 5379 &d_data->res.seq_res, 5380 task); 5381 } 5382 5383 static const struct rpc_call_ops nfs4_delegreturn_ops = { 5384 .rpc_call_prepare = nfs4_delegreturn_prepare, 5385 .rpc_call_done = nfs4_delegreturn_done, 5386 .rpc_release = nfs4_delegreturn_release, 5387 }; 5388 5389 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 5390 { 5391 struct nfs4_delegreturndata *data; 5392 struct nfs_server *server = NFS_SERVER(inode); 5393 struct rpc_task *task; 5394 struct rpc_message msg = { 5395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 5396 .rpc_cred = cred, 5397 }; 5398 struct rpc_task_setup task_setup_data = { 5399 .rpc_client = server->client, 5400 .rpc_message = &msg, 5401 .callback_ops = &nfs4_delegreturn_ops, 5402 .flags = RPC_TASK_ASYNC, 5403 }; 5404 int status = 0; 5405 5406 data = kzalloc(sizeof(*data), GFP_NOFS); 5407 if (data == NULL) 5408 return -ENOMEM; 5409 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 5410 5411 nfs4_state_protect(server->nfs_client, 5412 NFS_SP4_MACH_CRED_CLEANUP, 5413 &task_setup_data.rpc_client, &msg); 5414 5415 data->args.fhandle = &data->fh; 5416 data->args.stateid = &data->stateid; 5417 data->args.bitmask = server->cache_consistency_bitmask; 5418 nfs_copy_fh(&data->fh, NFS_FH(inode)); 5419 nfs4_stateid_copy(&data->stateid, stateid); 5420 data->res.fattr = &data->fattr; 5421 data->res.server = server; 5422 nfs_fattr_init(data->res.fattr); 5423 data->timestamp = jiffies; 5424 data->rpc_status = 0; 5425 data->inode = nfs_igrab_and_active(inode); 5426 if (data->inode) 5427 data->roc = nfs4_roc(inode); 5428 5429 task_setup_data.callback_data = data; 5430 msg.rpc_argp = &data->args; 5431 msg.rpc_resp = &data->res; 5432 task = rpc_run_task(&task_setup_data); 5433 if (IS_ERR(task)) 5434 return PTR_ERR(task); 5435 if (!issync) 5436 goto out; 5437 status = nfs4_wait_for_completion_rpc_task(task); 5438 if (status != 0) 5439 goto out; 5440 status = data->rpc_status; 5441 if (status == 0) 5442 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 5443 else 5444 nfs_refresh_inode(inode, &data->fattr); 5445 out: 5446 rpc_put_task(task); 5447 return status; 5448 } 5449 5450 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 5451 { 5452 struct nfs_server *server = NFS_SERVER(inode); 5453 struct nfs4_exception exception = { }; 5454 int err; 5455 do { 5456 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 5457 trace_nfs4_delegreturn(inode, stateid, err); 5458 switch (err) { 5459 case -NFS4ERR_STALE_STATEID: 5460 case -NFS4ERR_EXPIRED: 5461 case 0: 5462 return 0; 5463 } 5464 err = nfs4_handle_exception(server, err, &exception); 5465 } while (exception.retry); 5466 return err; 5467 } 5468 5469 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 5470 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 5471 5472 /* 5473 * sleep, with exponential backoff, and retry the LOCK operation. 5474 */ 5475 static unsigned long 5476 nfs4_set_lock_task_retry(unsigned long timeout) 5477 { 5478 freezable_schedule_timeout_killable_unsafe(timeout); 5479 timeout <<= 1; 5480 if (timeout > NFS4_LOCK_MAXTIMEOUT) 5481 return NFS4_LOCK_MAXTIMEOUT; 5482 return timeout; 5483 } 5484 5485 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5486 { 5487 struct inode *inode = state->inode; 5488 struct nfs_server *server = NFS_SERVER(inode); 5489 struct nfs_client *clp = server->nfs_client; 5490 struct nfs_lockt_args arg = { 5491 .fh = NFS_FH(inode), 5492 .fl = request, 5493 }; 5494 struct nfs_lockt_res res = { 5495 .denied = request, 5496 }; 5497 struct rpc_message msg = { 5498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 5499 .rpc_argp = &arg, 5500 .rpc_resp = &res, 5501 .rpc_cred = state->owner->so_cred, 5502 }; 5503 struct nfs4_lock_state *lsp; 5504 int status; 5505 5506 arg.lock_owner.clientid = clp->cl_clientid; 5507 status = nfs4_set_lock_state(state, request); 5508 if (status != 0) 5509 goto out; 5510 lsp = request->fl_u.nfs4_fl.owner; 5511 arg.lock_owner.id = lsp->ls_seqid.owner_id; 5512 arg.lock_owner.s_dev = server->s_dev; 5513 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5514 switch (status) { 5515 case 0: 5516 request->fl_type = F_UNLCK; 5517 break; 5518 case -NFS4ERR_DENIED: 5519 status = 0; 5520 } 5521 request->fl_ops->fl_release_private(request); 5522 request->fl_ops = NULL; 5523 out: 5524 return status; 5525 } 5526 5527 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5528 { 5529 struct nfs4_exception exception = { }; 5530 int err; 5531 5532 do { 5533 err = _nfs4_proc_getlk(state, cmd, request); 5534 trace_nfs4_get_lock(request, state, cmd, err); 5535 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 5536 &exception); 5537 } while (exception.retry); 5538 return err; 5539 } 5540 5541 static int do_vfs_lock(struct inode *inode, struct file_lock *fl) 5542 { 5543 return locks_lock_inode_wait(inode, fl); 5544 } 5545 5546 struct nfs4_unlockdata { 5547 struct nfs_locku_args arg; 5548 struct nfs_locku_res res; 5549 struct nfs4_lock_state *lsp; 5550 struct nfs_open_context *ctx; 5551 struct file_lock fl; 5552 struct nfs_server *server; 5553 unsigned long timestamp; 5554 }; 5555 5556 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 5557 struct nfs_open_context *ctx, 5558 struct nfs4_lock_state *lsp, 5559 struct nfs_seqid *seqid) 5560 { 5561 struct nfs4_unlockdata *p; 5562 struct inode *inode = lsp->ls_state->inode; 5563 5564 p = kzalloc(sizeof(*p), GFP_NOFS); 5565 if (p == NULL) 5566 return NULL; 5567 p->arg.fh = NFS_FH(inode); 5568 p->arg.fl = &p->fl; 5569 p->arg.seqid = seqid; 5570 p->res.seqid = seqid; 5571 p->lsp = lsp; 5572 atomic_inc(&lsp->ls_count); 5573 /* Ensure we don't close file until we're done freeing locks! */ 5574 p->ctx = get_nfs_open_context(ctx); 5575 memcpy(&p->fl, fl, sizeof(p->fl)); 5576 p->server = NFS_SERVER(inode); 5577 return p; 5578 } 5579 5580 static void nfs4_locku_release_calldata(void *data) 5581 { 5582 struct nfs4_unlockdata *calldata = data; 5583 nfs_free_seqid(calldata->arg.seqid); 5584 nfs4_put_lock_state(calldata->lsp); 5585 put_nfs_open_context(calldata->ctx); 5586 kfree(calldata); 5587 } 5588 5589 static void nfs4_locku_done(struct rpc_task *task, void *data) 5590 { 5591 struct nfs4_unlockdata *calldata = data; 5592 5593 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 5594 return; 5595 switch (task->tk_status) { 5596 case 0: 5597 renew_lease(calldata->server, calldata->timestamp); 5598 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl); 5599 if (nfs4_update_lock_stateid(calldata->lsp, 5600 &calldata->res.stateid)) 5601 break; 5602 case -NFS4ERR_BAD_STATEID: 5603 case -NFS4ERR_OLD_STATEID: 5604 case -NFS4ERR_STALE_STATEID: 5605 case -NFS4ERR_EXPIRED: 5606 if (!nfs4_stateid_match(&calldata->arg.stateid, 5607 &calldata->lsp->ls_stateid)) 5608 rpc_restart_call_prepare(task); 5609 break; 5610 default: 5611 if (nfs4_async_handle_error(task, calldata->server, 5612 NULL, NULL) == -EAGAIN) 5613 rpc_restart_call_prepare(task); 5614 } 5615 nfs_release_seqid(calldata->arg.seqid); 5616 } 5617 5618 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 5619 { 5620 struct nfs4_unlockdata *calldata = data; 5621 5622 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 5623 goto out_wait; 5624 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid); 5625 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 5626 /* Note: exit _without_ running nfs4_locku_done */ 5627 goto out_no_action; 5628 } 5629 calldata->timestamp = jiffies; 5630 if (nfs4_setup_sequence(calldata->server, 5631 &calldata->arg.seq_args, 5632 &calldata->res.seq_res, 5633 task) != 0) 5634 nfs_release_seqid(calldata->arg.seqid); 5635 return; 5636 out_no_action: 5637 task->tk_action = NULL; 5638 out_wait: 5639 nfs4_sequence_done(task, &calldata->res.seq_res); 5640 } 5641 5642 static const struct rpc_call_ops nfs4_locku_ops = { 5643 .rpc_call_prepare = nfs4_locku_prepare, 5644 .rpc_call_done = nfs4_locku_done, 5645 .rpc_release = nfs4_locku_release_calldata, 5646 }; 5647 5648 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 5649 struct nfs_open_context *ctx, 5650 struct nfs4_lock_state *lsp, 5651 struct nfs_seqid *seqid) 5652 { 5653 struct nfs4_unlockdata *data; 5654 struct rpc_message msg = { 5655 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 5656 .rpc_cred = ctx->cred, 5657 }; 5658 struct rpc_task_setup task_setup_data = { 5659 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 5660 .rpc_message = &msg, 5661 .callback_ops = &nfs4_locku_ops, 5662 .workqueue = nfsiod_workqueue, 5663 .flags = RPC_TASK_ASYNC, 5664 }; 5665 5666 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 5667 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 5668 5669 /* Ensure this is an unlock - when canceling a lock, the 5670 * canceled lock is passed in, and it won't be an unlock. 5671 */ 5672 fl->fl_type = F_UNLCK; 5673 5674 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 5675 if (data == NULL) { 5676 nfs_free_seqid(seqid); 5677 return ERR_PTR(-ENOMEM); 5678 } 5679 5680 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); 5681 msg.rpc_argp = &data->arg; 5682 msg.rpc_resp = &data->res; 5683 task_setup_data.callback_data = data; 5684 return rpc_run_task(&task_setup_data); 5685 } 5686 5687 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 5688 { 5689 struct inode *inode = state->inode; 5690 struct nfs4_state_owner *sp = state->owner; 5691 struct nfs_inode *nfsi = NFS_I(inode); 5692 struct nfs_seqid *seqid; 5693 struct nfs4_lock_state *lsp; 5694 struct rpc_task *task; 5695 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 5696 int status = 0; 5697 unsigned char fl_flags = request->fl_flags; 5698 5699 status = nfs4_set_lock_state(state, request); 5700 /* Unlock _before_ we do the RPC call */ 5701 request->fl_flags |= FL_EXISTS; 5702 /* Exclude nfs_delegation_claim_locks() */ 5703 mutex_lock(&sp->so_delegreturn_mutex); 5704 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 5705 down_read(&nfsi->rwsem); 5706 if (do_vfs_lock(inode, request) == -ENOENT) { 5707 up_read(&nfsi->rwsem); 5708 mutex_unlock(&sp->so_delegreturn_mutex); 5709 goto out; 5710 } 5711 up_read(&nfsi->rwsem); 5712 mutex_unlock(&sp->so_delegreturn_mutex); 5713 if (status != 0) 5714 goto out; 5715 /* Is this a delegated lock? */ 5716 lsp = request->fl_u.nfs4_fl.owner; 5717 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 5718 goto out; 5719 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 5720 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 5721 status = -ENOMEM; 5722 if (IS_ERR(seqid)) 5723 goto out; 5724 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 5725 status = PTR_ERR(task); 5726 if (IS_ERR(task)) 5727 goto out; 5728 status = nfs4_wait_for_completion_rpc_task(task); 5729 rpc_put_task(task); 5730 out: 5731 request->fl_flags = fl_flags; 5732 trace_nfs4_unlock(request, state, F_SETLK, status); 5733 return status; 5734 } 5735 5736 struct nfs4_lockdata { 5737 struct nfs_lock_args arg; 5738 struct nfs_lock_res res; 5739 struct nfs4_lock_state *lsp; 5740 struct nfs_open_context *ctx; 5741 struct file_lock fl; 5742 unsigned long timestamp; 5743 int rpc_status; 5744 int cancelled; 5745 struct nfs_server *server; 5746 }; 5747 5748 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 5749 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 5750 gfp_t gfp_mask) 5751 { 5752 struct nfs4_lockdata *p; 5753 struct inode *inode = lsp->ls_state->inode; 5754 struct nfs_server *server = NFS_SERVER(inode); 5755 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 5756 5757 p = kzalloc(sizeof(*p), gfp_mask); 5758 if (p == NULL) 5759 return NULL; 5760 5761 p->arg.fh = NFS_FH(inode); 5762 p->arg.fl = &p->fl; 5763 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 5764 if (IS_ERR(p->arg.open_seqid)) 5765 goto out_free; 5766 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 5767 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 5768 if (IS_ERR(p->arg.lock_seqid)) 5769 goto out_free_seqid; 5770 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 5771 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 5772 p->arg.lock_owner.s_dev = server->s_dev; 5773 p->res.lock_seqid = p->arg.lock_seqid; 5774 p->lsp = lsp; 5775 p->server = server; 5776 atomic_inc(&lsp->ls_count); 5777 p->ctx = get_nfs_open_context(ctx); 5778 get_file(fl->fl_file); 5779 memcpy(&p->fl, fl, sizeof(p->fl)); 5780 return p; 5781 out_free_seqid: 5782 nfs_free_seqid(p->arg.open_seqid); 5783 out_free: 5784 kfree(p); 5785 return NULL; 5786 } 5787 5788 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 5789 { 5790 struct nfs4_lockdata *data = calldata; 5791 struct nfs4_state *state = data->lsp->ls_state; 5792 5793 dprintk("%s: begin!\n", __func__); 5794 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 5795 goto out_wait; 5796 /* Do we need to do an open_to_lock_owner? */ 5797 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 5798 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 5799 goto out_release_lock_seqid; 5800 } 5801 nfs4_stateid_copy(&data->arg.open_stateid, 5802 &state->open_stateid); 5803 data->arg.new_lock_owner = 1; 5804 data->res.open_seqid = data->arg.open_seqid; 5805 } else { 5806 data->arg.new_lock_owner = 0; 5807 nfs4_stateid_copy(&data->arg.lock_stateid, 5808 &data->lsp->ls_stateid); 5809 } 5810 if (!nfs4_valid_open_stateid(state)) { 5811 data->rpc_status = -EBADF; 5812 task->tk_action = NULL; 5813 goto out_release_open_seqid; 5814 } 5815 data->timestamp = jiffies; 5816 if (nfs4_setup_sequence(data->server, 5817 &data->arg.seq_args, 5818 &data->res.seq_res, 5819 task) == 0) 5820 return; 5821 out_release_open_seqid: 5822 nfs_release_seqid(data->arg.open_seqid); 5823 out_release_lock_seqid: 5824 nfs_release_seqid(data->arg.lock_seqid); 5825 out_wait: 5826 nfs4_sequence_done(task, &data->res.seq_res); 5827 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 5828 } 5829 5830 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 5831 { 5832 struct nfs4_lockdata *data = calldata; 5833 struct nfs4_lock_state *lsp = data->lsp; 5834 5835 dprintk("%s: begin!\n", __func__); 5836 5837 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5838 return; 5839 5840 data->rpc_status = task->tk_status; 5841 switch (task->tk_status) { 5842 case 0: 5843 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 5844 data->timestamp); 5845 if (data->arg.new_lock) { 5846 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 5847 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) { 5848 rpc_restart_call_prepare(task); 5849 break; 5850 } 5851 } 5852 if (data->arg.new_lock_owner != 0) { 5853 nfs_confirm_seqid(&lsp->ls_seqid, 0); 5854 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 5855 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 5856 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 5857 rpc_restart_call_prepare(task); 5858 break; 5859 case -NFS4ERR_BAD_STATEID: 5860 case -NFS4ERR_OLD_STATEID: 5861 case -NFS4ERR_STALE_STATEID: 5862 case -NFS4ERR_EXPIRED: 5863 if (data->arg.new_lock_owner != 0) { 5864 if (!nfs4_stateid_match(&data->arg.open_stateid, 5865 &lsp->ls_state->open_stateid)) 5866 rpc_restart_call_prepare(task); 5867 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 5868 &lsp->ls_stateid)) 5869 rpc_restart_call_prepare(task); 5870 } 5871 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 5872 } 5873 5874 static void nfs4_lock_release(void *calldata) 5875 { 5876 struct nfs4_lockdata *data = calldata; 5877 5878 dprintk("%s: begin!\n", __func__); 5879 nfs_free_seqid(data->arg.open_seqid); 5880 if (data->cancelled != 0) { 5881 struct rpc_task *task; 5882 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 5883 data->arg.lock_seqid); 5884 if (!IS_ERR(task)) 5885 rpc_put_task_async(task); 5886 dprintk("%s: cancelling lock!\n", __func__); 5887 } else 5888 nfs_free_seqid(data->arg.lock_seqid); 5889 nfs4_put_lock_state(data->lsp); 5890 put_nfs_open_context(data->ctx); 5891 fput(data->fl.fl_file); 5892 kfree(data); 5893 dprintk("%s: done!\n", __func__); 5894 } 5895 5896 static const struct rpc_call_ops nfs4_lock_ops = { 5897 .rpc_call_prepare = nfs4_lock_prepare, 5898 .rpc_call_done = nfs4_lock_done, 5899 .rpc_release = nfs4_lock_release, 5900 }; 5901 5902 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 5903 { 5904 switch (error) { 5905 case -NFS4ERR_ADMIN_REVOKED: 5906 case -NFS4ERR_BAD_STATEID: 5907 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 5908 if (new_lock_owner != 0 || 5909 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 5910 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 5911 break; 5912 case -NFS4ERR_STALE_STATEID: 5913 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 5914 case -NFS4ERR_EXPIRED: 5915 nfs4_schedule_lease_recovery(server->nfs_client); 5916 }; 5917 } 5918 5919 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 5920 { 5921 struct nfs4_lockdata *data; 5922 struct rpc_task *task; 5923 struct rpc_message msg = { 5924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 5925 .rpc_cred = state->owner->so_cred, 5926 }; 5927 struct rpc_task_setup task_setup_data = { 5928 .rpc_client = NFS_CLIENT(state->inode), 5929 .rpc_message = &msg, 5930 .callback_ops = &nfs4_lock_ops, 5931 .workqueue = nfsiod_workqueue, 5932 .flags = RPC_TASK_ASYNC, 5933 }; 5934 int ret; 5935 5936 dprintk("%s: begin!\n", __func__); 5937 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 5938 fl->fl_u.nfs4_fl.owner, 5939 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 5940 if (data == NULL) 5941 return -ENOMEM; 5942 if (IS_SETLKW(cmd)) 5943 data->arg.block = 1; 5944 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); 5945 msg.rpc_argp = &data->arg; 5946 msg.rpc_resp = &data->res; 5947 task_setup_data.callback_data = data; 5948 if (recovery_type > NFS_LOCK_NEW) { 5949 if (recovery_type == NFS_LOCK_RECLAIM) 5950 data->arg.reclaim = NFS_LOCK_RECLAIM; 5951 nfs4_set_sequence_privileged(&data->arg.seq_args); 5952 } else 5953 data->arg.new_lock = 1; 5954 task = rpc_run_task(&task_setup_data); 5955 if (IS_ERR(task)) 5956 return PTR_ERR(task); 5957 ret = nfs4_wait_for_completion_rpc_task(task); 5958 if (ret == 0) { 5959 ret = data->rpc_status; 5960 if (ret) 5961 nfs4_handle_setlk_error(data->server, data->lsp, 5962 data->arg.new_lock_owner, ret); 5963 } else 5964 data->cancelled = 1; 5965 rpc_put_task(task); 5966 dprintk("%s: done, ret = %d!\n", __func__, ret); 5967 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 5968 return ret; 5969 } 5970 5971 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 5972 { 5973 struct nfs_server *server = NFS_SERVER(state->inode); 5974 struct nfs4_exception exception = { 5975 .inode = state->inode, 5976 }; 5977 int err; 5978 5979 do { 5980 /* Cache the lock if possible... */ 5981 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 5982 return 0; 5983 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 5984 if (err != -NFS4ERR_DELAY) 5985 break; 5986 nfs4_handle_exception(server, err, &exception); 5987 } while (exception.retry); 5988 return err; 5989 } 5990 5991 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 5992 { 5993 struct nfs_server *server = NFS_SERVER(state->inode); 5994 struct nfs4_exception exception = { 5995 .inode = state->inode, 5996 }; 5997 int err; 5998 5999 err = nfs4_set_lock_state(state, request); 6000 if (err != 0) 6001 return err; 6002 if (!recover_lost_locks) { 6003 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 6004 return 0; 6005 } 6006 do { 6007 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 6008 return 0; 6009 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 6010 switch (err) { 6011 default: 6012 goto out; 6013 case -NFS4ERR_GRACE: 6014 case -NFS4ERR_DELAY: 6015 nfs4_handle_exception(server, err, &exception); 6016 err = 0; 6017 } 6018 } while (exception.retry); 6019 out: 6020 return err; 6021 } 6022 6023 #if defined(CONFIG_NFS_V4_1) 6024 /** 6025 * nfs41_check_expired_locks - possibly free a lock stateid 6026 * 6027 * @state: NFSv4 state for an inode 6028 * 6029 * Returns NFS_OK if recovery for this stateid is now finished. 6030 * Otherwise a negative NFS4ERR value is returned. 6031 */ 6032 static int nfs41_check_expired_locks(struct nfs4_state *state) 6033 { 6034 int status, ret = -NFS4ERR_BAD_STATEID; 6035 struct nfs4_lock_state *lsp; 6036 struct nfs_server *server = NFS_SERVER(state->inode); 6037 6038 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 6039 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 6040 struct rpc_cred *cred = lsp->ls_state->owner->so_cred; 6041 6042 status = nfs41_test_stateid(server, 6043 &lsp->ls_stateid, 6044 cred); 6045 trace_nfs4_test_lock_stateid(state, lsp, status); 6046 if (status != NFS_OK) { 6047 /* Free the stateid unless the server 6048 * informs us the stateid is unrecognized. */ 6049 if (status != -NFS4ERR_BAD_STATEID) 6050 nfs41_free_stateid(server, 6051 &lsp->ls_stateid, 6052 cred); 6053 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 6054 ret = status; 6055 } 6056 } 6057 }; 6058 6059 return ret; 6060 } 6061 6062 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 6063 { 6064 int status = NFS_OK; 6065 6066 if (test_bit(LK_STATE_IN_USE, &state->flags)) 6067 status = nfs41_check_expired_locks(state); 6068 if (status != NFS_OK) 6069 status = nfs4_lock_expired(state, request); 6070 return status; 6071 } 6072 #endif 6073 6074 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6075 { 6076 struct nfs_inode *nfsi = NFS_I(state->inode); 6077 struct nfs4_state_owner *sp = state->owner; 6078 unsigned char fl_flags = request->fl_flags; 6079 int status = -ENOLCK; 6080 6081 if ((fl_flags & FL_POSIX) && 6082 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 6083 goto out; 6084 /* Is this a delegated open? */ 6085 status = nfs4_set_lock_state(state, request); 6086 if (status != 0) 6087 goto out; 6088 request->fl_flags |= FL_ACCESS; 6089 status = do_vfs_lock(state->inode, request); 6090 if (status < 0) 6091 goto out; 6092 mutex_lock(&sp->so_delegreturn_mutex); 6093 down_read(&nfsi->rwsem); 6094 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 6095 /* Yes: cache locks! */ 6096 /* ...but avoid races with delegation recall... */ 6097 request->fl_flags = fl_flags & ~FL_SLEEP; 6098 status = do_vfs_lock(state->inode, request); 6099 up_read(&nfsi->rwsem); 6100 mutex_unlock(&sp->so_delegreturn_mutex); 6101 goto out; 6102 } 6103 up_read(&nfsi->rwsem); 6104 mutex_unlock(&sp->so_delegreturn_mutex); 6105 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 6106 out: 6107 request->fl_flags = fl_flags; 6108 return status; 6109 } 6110 6111 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6112 { 6113 struct nfs4_exception exception = { 6114 .state = state, 6115 .inode = state->inode, 6116 }; 6117 int err; 6118 6119 do { 6120 err = _nfs4_proc_setlk(state, cmd, request); 6121 if (err == -NFS4ERR_DENIED) 6122 err = -EAGAIN; 6123 err = nfs4_handle_exception(NFS_SERVER(state->inode), 6124 err, &exception); 6125 } while (exception.retry); 6126 return err; 6127 } 6128 6129 static int 6130 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 6131 { 6132 struct nfs_open_context *ctx; 6133 struct nfs4_state *state; 6134 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 6135 int status; 6136 6137 /* verify open state */ 6138 ctx = nfs_file_open_context(filp); 6139 state = ctx->state; 6140 6141 if (request->fl_start < 0 || request->fl_end < 0) 6142 return -EINVAL; 6143 6144 if (IS_GETLK(cmd)) { 6145 if (state != NULL) 6146 return nfs4_proc_getlk(state, F_GETLK, request); 6147 return 0; 6148 } 6149 6150 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 6151 return -EINVAL; 6152 6153 if (request->fl_type == F_UNLCK) { 6154 if (state != NULL) 6155 return nfs4_proc_unlck(state, cmd, request); 6156 return 0; 6157 } 6158 6159 if (state == NULL) 6160 return -ENOLCK; 6161 /* 6162 * Don't rely on the VFS having checked the file open mode, 6163 * since it won't do this for flock() locks. 6164 */ 6165 switch (request->fl_type) { 6166 case F_RDLCK: 6167 if (!(filp->f_mode & FMODE_READ)) 6168 return -EBADF; 6169 break; 6170 case F_WRLCK: 6171 if (!(filp->f_mode & FMODE_WRITE)) 6172 return -EBADF; 6173 } 6174 6175 do { 6176 status = nfs4_proc_setlk(state, cmd, request); 6177 if ((status != -EAGAIN) || IS_SETLK(cmd)) 6178 break; 6179 timeout = nfs4_set_lock_task_retry(timeout); 6180 status = -ERESTARTSYS; 6181 if (signalled()) 6182 break; 6183 } while(status < 0); 6184 return status; 6185 } 6186 6187 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 6188 { 6189 struct nfs_server *server = NFS_SERVER(state->inode); 6190 int err; 6191 6192 err = nfs4_set_lock_state(state, fl); 6193 if (err != 0) 6194 return err; 6195 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 6196 return nfs4_handle_delegation_recall_error(server, state, stateid, err); 6197 } 6198 6199 struct nfs_release_lockowner_data { 6200 struct nfs4_lock_state *lsp; 6201 struct nfs_server *server; 6202 struct nfs_release_lockowner_args args; 6203 struct nfs_release_lockowner_res res; 6204 unsigned long timestamp; 6205 }; 6206 6207 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 6208 { 6209 struct nfs_release_lockowner_data *data = calldata; 6210 struct nfs_server *server = data->server; 6211 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl, 6212 &data->args.seq_args, &data->res.seq_res, task); 6213 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 6214 data->timestamp = jiffies; 6215 } 6216 6217 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 6218 { 6219 struct nfs_release_lockowner_data *data = calldata; 6220 struct nfs_server *server = data->server; 6221 6222 nfs40_sequence_done(task, &data->res.seq_res); 6223 6224 switch (task->tk_status) { 6225 case 0: 6226 renew_lease(server, data->timestamp); 6227 break; 6228 case -NFS4ERR_STALE_CLIENTID: 6229 case -NFS4ERR_EXPIRED: 6230 nfs4_schedule_lease_recovery(server->nfs_client); 6231 break; 6232 case -NFS4ERR_LEASE_MOVED: 6233 case -NFS4ERR_DELAY: 6234 if (nfs4_async_handle_error(task, server, 6235 NULL, NULL) == -EAGAIN) 6236 rpc_restart_call_prepare(task); 6237 } 6238 } 6239 6240 static void nfs4_release_lockowner_release(void *calldata) 6241 { 6242 struct nfs_release_lockowner_data *data = calldata; 6243 nfs4_free_lock_state(data->server, data->lsp); 6244 kfree(calldata); 6245 } 6246 6247 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 6248 .rpc_call_prepare = nfs4_release_lockowner_prepare, 6249 .rpc_call_done = nfs4_release_lockowner_done, 6250 .rpc_release = nfs4_release_lockowner_release, 6251 }; 6252 6253 static void 6254 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 6255 { 6256 struct nfs_release_lockowner_data *data; 6257 struct rpc_message msg = { 6258 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 6259 }; 6260 6261 if (server->nfs_client->cl_mvops->minor_version != 0) 6262 return; 6263 6264 data = kmalloc(sizeof(*data), GFP_NOFS); 6265 if (!data) 6266 return; 6267 data->lsp = lsp; 6268 data->server = server; 6269 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 6270 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 6271 data->args.lock_owner.s_dev = server->s_dev; 6272 6273 msg.rpc_argp = &data->args; 6274 msg.rpc_resp = &data->res; 6275 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 6276 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 6277 } 6278 6279 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 6280 6281 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 6282 struct dentry *unused, struct inode *inode, 6283 const char *key, const void *buf, 6284 size_t buflen, int flags) 6285 { 6286 return nfs4_proc_set_acl(inode, buf, buflen); 6287 } 6288 6289 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 6290 struct dentry *unused, struct inode *inode, 6291 const char *key, void *buf, size_t buflen) 6292 { 6293 return nfs4_proc_get_acl(inode, buf, buflen); 6294 } 6295 6296 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 6297 { 6298 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 6299 } 6300 6301 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 6302 6303 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 6304 struct dentry *unused, struct inode *inode, 6305 const char *key, const void *buf, 6306 size_t buflen, int flags) 6307 { 6308 if (security_ismaclabel(key)) 6309 return nfs4_set_security_label(inode, buf, buflen); 6310 6311 return -EOPNOTSUPP; 6312 } 6313 6314 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 6315 struct dentry *unused, struct inode *inode, 6316 const char *key, void *buf, size_t buflen) 6317 { 6318 if (security_ismaclabel(key)) 6319 return nfs4_get_security_label(inode, buf, buflen); 6320 return -EOPNOTSUPP; 6321 } 6322 6323 static ssize_t 6324 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 6325 { 6326 int len = 0; 6327 6328 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 6329 len = security_inode_listsecurity(inode, list, list_len); 6330 if (list_len && len > list_len) 6331 return -ERANGE; 6332 } 6333 return len; 6334 } 6335 6336 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 6337 .prefix = XATTR_SECURITY_PREFIX, 6338 .get = nfs4_xattr_get_nfs4_label, 6339 .set = nfs4_xattr_set_nfs4_label, 6340 }; 6341 6342 #else 6343 6344 static ssize_t 6345 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 6346 { 6347 return 0; 6348 } 6349 6350 #endif 6351 6352 /* 6353 * nfs_fhget will use either the mounted_on_fileid or the fileid 6354 */ 6355 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 6356 { 6357 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 6358 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 6359 (fattr->valid & NFS_ATTR_FATTR_FSID) && 6360 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 6361 return; 6362 6363 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 6364 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 6365 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 6366 fattr->nlink = 2; 6367 } 6368 6369 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 6370 const struct qstr *name, 6371 struct nfs4_fs_locations *fs_locations, 6372 struct page *page) 6373 { 6374 struct nfs_server *server = NFS_SERVER(dir); 6375 u32 bitmask[3] = { 6376 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6377 }; 6378 struct nfs4_fs_locations_arg args = { 6379 .dir_fh = NFS_FH(dir), 6380 .name = name, 6381 .page = page, 6382 .bitmask = bitmask, 6383 }; 6384 struct nfs4_fs_locations_res res = { 6385 .fs_locations = fs_locations, 6386 }; 6387 struct rpc_message msg = { 6388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6389 .rpc_argp = &args, 6390 .rpc_resp = &res, 6391 }; 6392 int status; 6393 6394 dprintk("%s: start\n", __func__); 6395 6396 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 6397 * is not supported */ 6398 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 6399 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID; 6400 else 6401 bitmask[0] |= FATTR4_WORD0_FILEID; 6402 6403 nfs_fattr_init(&fs_locations->fattr); 6404 fs_locations->server = server; 6405 fs_locations->nlocations = 0; 6406 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 6407 dprintk("%s: returned status = %d\n", __func__, status); 6408 return status; 6409 } 6410 6411 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 6412 const struct qstr *name, 6413 struct nfs4_fs_locations *fs_locations, 6414 struct page *page) 6415 { 6416 struct nfs4_exception exception = { }; 6417 int err; 6418 do { 6419 err = _nfs4_proc_fs_locations(client, dir, name, 6420 fs_locations, page); 6421 trace_nfs4_get_fs_locations(dir, name, err); 6422 err = nfs4_handle_exception(NFS_SERVER(dir), err, 6423 &exception); 6424 } while (exception.retry); 6425 return err; 6426 } 6427 6428 /* 6429 * This operation also signals the server that this client is 6430 * performing migration recovery. The server can stop returning 6431 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 6432 * appended to this compound to identify the client ID which is 6433 * performing recovery. 6434 */ 6435 static int _nfs40_proc_get_locations(struct inode *inode, 6436 struct nfs4_fs_locations *locations, 6437 struct page *page, struct rpc_cred *cred) 6438 { 6439 struct nfs_server *server = NFS_SERVER(inode); 6440 struct rpc_clnt *clnt = server->client; 6441 u32 bitmask[2] = { 6442 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6443 }; 6444 struct nfs4_fs_locations_arg args = { 6445 .clientid = server->nfs_client->cl_clientid, 6446 .fh = NFS_FH(inode), 6447 .page = page, 6448 .bitmask = bitmask, 6449 .migration = 1, /* skip LOOKUP */ 6450 .renew = 1, /* append RENEW */ 6451 }; 6452 struct nfs4_fs_locations_res res = { 6453 .fs_locations = locations, 6454 .migration = 1, 6455 .renew = 1, 6456 }; 6457 struct rpc_message msg = { 6458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6459 .rpc_argp = &args, 6460 .rpc_resp = &res, 6461 .rpc_cred = cred, 6462 }; 6463 unsigned long now = jiffies; 6464 int status; 6465 6466 nfs_fattr_init(&locations->fattr); 6467 locations->server = server; 6468 locations->nlocations = 0; 6469 6470 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6471 nfs4_set_sequence_privileged(&args.seq_args); 6472 status = nfs4_call_sync_sequence(clnt, server, &msg, 6473 &args.seq_args, &res.seq_res); 6474 if (status) 6475 return status; 6476 6477 renew_lease(server, now); 6478 return 0; 6479 } 6480 6481 #ifdef CONFIG_NFS_V4_1 6482 6483 /* 6484 * This operation also signals the server that this client is 6485 * performing migration recovery. The server can stop asserting 6486 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 6487 * performing this operation is identified in the SEQUENCE 6488 * operation in this compound. 6489 * 6490 * When the client supports GETATTR(fs_locations_info), it can 6491 * be plumbed in here. 6492 */ 6493 static int _nfs41_proc_get_locations(struct inode *inode, 6494 struct nfs4_fs_locations *locations, 6495 struct page *page, struct rpc_cred *cred) 6496 { 6497 struct nfs_server *server = NFS_SERVER(inode); 6498 struct rpc_clnt *clnt = server->client; 6499 u32 bitmask[2] = { 6500 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6501 }; 6502 struct nfs4_fs_locations_arg args = { 6503 .fh = NFS_FH(inode), 6504 .page = page, 6505 .bitmask = bitmask, 6506 .migration = 1, /* skip LOOKUP */ 6507 }; 6508 struct nfs4_fs_locations_res res = { 6509 .fs_locations = locations, 6510 .migration = 1, 6511 }; 6512 struct rpc_message msg = { 6513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6514 .rpc_argp = &args, 6515 .rpc_resp = &res, 6516 .rpc_cred = cred, 6517 }; 6518 int status; 6519 6520 nfs_fattr_init(&locations->fattr); 6521 locations->server = server; 6522 locations->nlocations = 0; 6523 6524 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6525 nfs4_set_sequence_privileged(&args.seq_args); 6526 status = nfs4_call_sync_sequence(clnt, server, &msg, 6527 &args.seq_args, &res.seq_res); 6528 if (status == NFS4_OK && 6529 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 6530 status = -NFS4ERR_LEASE_MOVED; 6531 return status; 6532 } 6533 6534 #endif /* CONFIG_NFS_V4_1 */ 6535 6536 /** 6537 * nfs4_proc_get_locations - discover locations for a migrated FSID 6538 * @inode: inode on FSID that is migrating 6539 * @locations: result of query 6540 * @page: buffer 6541 * @cred: credential to use for this operation 6542 * 6543 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 6544 * operation failed, or a negative errno if a local error occurred. 6545 * 6546 * On success, "locations" is filled in, but if the server has 6547 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 6548 * asserted. 6549 * 6550 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 6551 * from this client that require migration recovery. 6552 */ 6553 int nfs4_proc_get_locations(struct inode *inode, 6554 struct nfs4_fs_locations *locations, 6555 struct page *page, struct rpc_cred *cred) 6556 { 6557 struct nfs_server *server = NFS_SERVER(inode); 6558 struct nfs_client *clp = server->nfs_client; 6559 const struct nfs4_mig_recovery_ops *ops = 6560 clp->cl_mvops->mig_recovery_ops; 6561 struct nfs4_exception exception = { }; 6562 int status; 6563 6564 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 6565 (unsigned long long)server->fsid.major, 6566 (unsigned long long)server->fsid.minor, 6567 clp->cl_hostname); 6568 nfs_display_fhandle(NFS_FH(inode), __func__); 6569 6570 do { 6571 status = ops->get_locations(inode, locations, page, cred); 6572 if (status != -NFS4ERR_DELAY) 6573 break; 6574 nfs4_handle_exception(server, status, &exception); 6575 } while (exception.retry); 6576 return status; 6577 } 6578 6579 /* 6580 * This operation also signals the server that this client is 6581 * performing "lease moved" recovery. The server can stop 6582 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 6583 * is appended to this compound to identify the client ID which is 6584 * performing recovery. 6585 */ 6586 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6587 { 6588 struct nfs_server *server = NFS_SERVER(inode); 6589 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 6590 struct rpc_clnt *clnt = server->client; 6591 struct nfs4_fsid_present_arg args = { 6592 .fh = NFS_FH(inode), 6593 .clientid = clp->cl_clientid, 6594 .renew = 1, /* append RENEW */ 6595 }; 6596 struct nfs4_fsid_present_res res = { 6597 .renew = 1, 6598 }; 6599 struct rpc_message msg = { 6600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 6601 .rpc_argp = &args, 6602 .rpc_resp = &res, 6603 .rpc_cred = cred, 6604 }; 6605 unsigned long now = jiffies; 6606 int status; 6607 6608 res.fh = nfs_alloc_fhandle(); 6609 if (res.fh == NULL) 6610 return -ENOMEM; 6611 6612 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6613 nfs4_set_sequence_privileged(&args.seq_args); 6614 status = nfs4_call_sync_sequence(clnt, server, &msg, 6615 &args.seq_args, &res.seq_res); 6616 nfs_free_fhandle(res.fh); 6617 if (status) 6618 return status; 6619 6620 do_renew_lease(clp, now); 6621 return 0; 6622 } 6623 6624 #ifdef CONFIG_NFS_V4_1 6625 6626 /* 6627 * This operation also signals the server that this client is 6628 * performing "lease moved" recovery. The server can stop asserting 6629 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 6630 * this operation is identified in the SEQUENCE operation in this 6631 * compound. 6632 */ 6633 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6634 { 6635 struct nfs_server *server = NFS_SERVER(inode); 6636 struct rpc_clnt *clnt = server->client; 6637 struct nfs4_fsid_present_arg args = { 6638 .fh = NFS_FH(inode), 6639 }; 6640 struct nfs4_fsid_present_res res = { 6641 }; 6642 struct rpc_message msg = { 6643 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 6644 .rpc_argp = &args, 6645 .rpc_resp = &res, 6646 .rpc_cred = cred, 6647 }; 6648 int status; 6649 6650 res.fh = nfs_alloc_fhandle(); 6651 if (res.fh == NULL) 6652 return -ENOMEM; 6653 6654 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6655 nfs4_set_sequence_privileged(&args.seq_args); 6656 status = nfs4_call_sync_sequence(clnt, server, &msg, 6657 &args.seq_args, &res.seq_res); 6658 nfs_free_fhandle(res.fh); 6659 if (status == NFS4_OK && 6660 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 6661 status = -NFS4ERR_LEASE_MOVED; 6662 return status; 6663 } 6664 6665 #endif /* CONFIG_NFS_V4_1 */ 6666 6667 /** 6668 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 6669 * @inode: inode on FSID to check 6670 * @cred: credential to use for this operation 6671 * 6672 * Server indicates whether the FSID is present, moved, or not 6673 * recognized. This operation is necessary to clear a LEASE_MOVED 6674 * condition for this client ID. 6675 * 6676 * Returns NFS4_OK if the FSID is present on this server, 6677 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 6678 * NFS4ERR code if some error occurred on the server, or a 6679 * negative errno if a local failure occurred. 6680 */ 6681 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6682 { 6683 struct nfs_server *server = NFS_SERVER(inode); 6684 struct nfs_client *clp = server->nfs_client; 6685 const struct nfs4_mig_recovery_ops *ops = 6686 clp->cl_mvops->mig_recovery_ops; 6687 struct nfs4_exception exception = { }; 6688 int status; 6689 6690 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 6691 (unsigned long long)server->fsid.major, 6692 (unsigned long long)server->fsid.minor, 6693 clp->cl_hostname); 6694 nfs_display_fhandle(NFS_FH(inode), __func__); 6695 6696 do { 6697 status = ops->fsid_present(inode, cred); 6698 if (status != -NFS4ERR_DELAY) 6699 break; 6700 nfs4_handle_exception(server, status, &exception); 6701 } while (exception.retry); 6702 return status; 6703 } 6704 6705 /** 6706 * If 'use_integrity' is true and the state managment nfs_client 6707 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 6708 * and the machine credential as per RFC3530bis and RFC5661 Security 6709 * Considerations sections. Otherwise, just use the user cred with the 6710 * filesystem's rpc_client. 6711 */ 6712 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 6713 { 6714 int status; 6715 struct nfs4_secinfo_arg args = { 6716 .dir_fh = NFS_FH(dir), 6717 .name = name, 6718 }; 6719 struct nfs4_secinfo_res res = { 6720 .flavors = flavors, 6721 }; 6722 struct rpc_message msg = { 6723 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 6724 .rpc_argp = &args, 6725 .rpc_resp = &res, 6726 }; 6727 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 6728 struct rpc_cred *cred = NULL; 6729 6730 if (use_integrity) { 6731 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient; 6732 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client); 6733 msg.rpc_cred = cred; 6734 } 6735 6736 dprintk("NFS call secinfo %s\n", name->name); 6737 6738 nfs4_state_protect(NFS_SERVER(dir)->nfs_client, 6739 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 6740 6741 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, 6742 &res.seq_res, 0); 6743 dprintk("NFS reply secinfo: %d\n", status); 6744 6745 if (cred) 6746 put_rpccred(cred); 6747 6748 return status; 6749 } 6750 6751 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 6752 struct nfs4_secinfo_flavors *flavors) 6753 { 6754 struct nfs4_exception exception = { }; 6755 int err; 6756 do { 6757 err = -NFS4ERR_WRONGSEC; 6758 6759 /* try to use integrity protection with machine cred */ 6760 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 6761 err = _nfs4_proc_secinfo(dir, name, flavors, true); 6762 6763 /* 6764 * if unable to use integrity protection, or SECINFO with 6765 * integrity protection returns NFS4ERR_WRONGSEC (which is 6766 * disallowed by spec, but exists in deployed servers) use 6767 * the current filesystem's rpc_client and the user cred. 6768 */ 6769 if (err == -NFS4ERR_WRONGSEC) 6770 err = _nfs4_proc_secinfo(dir, name, flavors, false); 6771 6772 trace_nfs4_secinfo(dir, name, err); 6773 err = nfs4_handle_exception(NFS_SERVER(dir), err, 6774 &exception); 6775 } while (exception.retry); 6776 return err; 6777 } 6778 6779 #ifdef CONFIG_NFS_V4_1 6780 /* 6781 * Check the exchange flags returned by the server for invalid flags, having 6782 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 6783 * DS flags set. 6784 */ 6785 static int nfs4_check_cl_exchange_flags(u32 flags) 6786 { 6787 if (flags & ~EXCHGID4_FLAG_MASK_R) 6788 goto out_inval; 6789 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 6790 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 6791 goto out_inval; 6792 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 6793 goto out_inval; 6794 return NFS_OK; 6795 out_inval: 6796 return -NFS4ERR_INVAL; 6797 } 6798 6799 static bool 6800 nfs41_same_server_scope(struct nfs41_server_scope *a, 6801 struct nfs41_server_scope *b) 6802 { 6803 if (a->server_scope_sz == b->server_scope_sz && 6804 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0) 6805 return true; 6806 6807 return false; 6808 } 6809 6810 static void 6811 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 6812 { 6813 } 6814 6815 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 6816 .rpc_call_done = &nfs4_bind_one_conn_to_session_done, 6817 }; 6818 6819 /* 6820 * nfs4_proc_bind_one_conn_to_session() 6821 * 6822 * The 4.1 client currently uses the same TCP connection for the 6823 * fore and backchannel. 6824 */ 6825 static 6826 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 6827 struct rpc_xprt *xprt, 6828 struct nfs_client *clp, 6829 struct rpc_cred *cred) 6830 { 6831 int status; 6832 struct nfs41_bind_conn_to_session_args args = { 6833 .client = clp, 6834 .dir = NFS4_CDFC4_FORE_OR_BOTH, 6835 }; 6836 struct nfs41_bind_conn_to_session_res res; 6837 struct rpc_message msg = { 6838 .rpc_proc = 6839 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 6840 .rpc_argp = &args, 6841 .rpc_resp = &res, 6842 .rpc_cred = cred, 6843 }; 6844 struct rpc_task_setup task_setup_data = { 6845 .rpc_client = clnt, 6846 .rpc_xprt = xprt, 6847 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 6848 .rpc_message = &msg, 6849 .flags = RPC_TASK_TIMEOUT, 6850 }; 6851 struct rpc_task *task; 6852 6853 dprintk("--> %s\n", __func__); 6854 6855 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 6856 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 6857 args.dir = NFS4_CDFC4_FORE; 6858 6859 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 6860 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 6861 args.dir = NFS4_CDFC4_FORE; 6862 6863 task = rpc_run_task(&task_setup_data); 6864 if (!IS_ERR(task)) { 6865 status = task->tk_status; 6866 rpc_put_task(task); 6867 } else 6868 status = PTR_ERR(task); 6869 trace_nfs4_bind_conn_to_session(clp, status); 6870 if (status == 0) { 6871 if (memcmp(res.sessionid.data, 6872 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 6873 dprintk("NFS: %s: Session ID mismatch\n", __func__); 6874 status = -EIO; 6875 goto out; 6876 } 6877 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 6878 dprintk("NFS: %s: Unexpected direction from server\n", 6879 __func__); 6880 status = -EIO; 6881 goto out; 6882 } 6883 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 6884 dprintk("NFS: %s: Server returned RDMA mode = true\n", 6885 __func__); 6886 status = -EIO; 6887 goto out; 6888 } 6889 } 6890 out: 6891 dprintk("<-- %s status= %d\n", __func__, status); 6892 return status; 6893 } 6894 6895 struct rpc_bind_conn_calldata { 6896 struct nfs_client *clp; 6897 struct rpc_cred *cred; 6898 }; 6899 6900 static int 6901 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 6902 struct rpc_xprt *xprt, 6903 void *calldata) 6904 { 6905 struct rpc_bind_conn_calldata *p = calldata; 6906 6907 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 6908 } 6909 6910 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred) 6911 { 6912 struct rpc_bind_conn_calldata data = { 6913 .clp = clp, 6914 .cred = cred, 6915 }; 6916 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 6917 nfs4_proc_bind_conn_to_session_callback, &data); 6918 } 6919 6920 /* 6921 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 6922 * and operations we'd like to see to enable certain features in the allow map 6923 */ 6924 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 6925 .how = SP4_MACH_CRED, 6926 .enforce.u.words = { 6927 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 6928 1 << (OP_EXCHANGE_ID - 32) | 6929 1 << (OP_CREATE_SESSION - 32) | 6930 1 << (OP_DESTROY_SESSION - 32) | 6931 1 << (OP_DESTROY_CLIENTID - 32) 6932 }, 6933 .allow.u.words = { 6934 [0] = 1 << (OP_CLOSE) | 6935 1 << (OP_OPEN_DOWNGRADE) | 6936 1 << (OP_LOCKU) | 6937 1 << (OP_DELEGRETURN) | 6938 1 << (OP_COMMIT), 6939 [1] = 1 << (OP_SECINFO - 32) | 6940 1 << (OP_SECINFO_NO_NAME - 32) | 6941 1 << (OP_LAYOUTRETURN - 32) | 6942 1 << (OP_TEST_STATEID - 32) | 6943 1 << (OP_FREE_STATEID - 32) | 6944 1 << (OP_WRITE - 32) 6945 } 6946 }; 6947 6948 /* 6949 * Select the state protection mode for client `clp' given the server results 6950 * from exchange_id in `sp'. 6951 * 6952 * Returns 0 on success, negative errno otherwise. 6953 */ 6954 static int nfs4_sp4_select_mode(struct nfs_client *clp, 6955 struct nfs41_state_protection *sp) 6956 { 6957 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 6958 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 6959 1 << (OP_EXCHANGE_ID - 32) | 6960 1 << (OP_CREATE_SESSION - 32) | 6961 1 << (OP_DESTROY_SESSION - 32) | 6962 1 << (OP_DESTROY_CLIENTID - 32) 6963 }; 6964 unsigned int i; 6965 6966 if (sp->how == SP4_MACH_CRED) { 6967 /* Print state protect result */ 6968 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 6969 for (i = 0; i <= LAST_NFS4_OP; i++) { 6970 if (test_bit(i, sp->enforce.u.longs)) 6971 dfprintk(MOUNT, " enforce op %d\n", i); 6972 if (test_bit(i, sp->allow.u.longs)) 6973 dfprintk(MOUNT, " allow op %d\n", i); 6974 } 6975 6976 /* make sure nothing is on enforce list that isn't supported */ 6977 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 6978 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 6979 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 6980 return -EINVAL; 6981 } 6982 } 6983 6984 /* 6985 * Minimal mode - state operations are allowed to use machine 6986 * credential. Note this already happens by default, so the 6987 * client doesn't have to do anything more than the negotiation. 6988 * 6989 * NOTE: we don't care if EXCHANGE_ID is in the list - 6990 * we're already using the machine cred for exchange_id 6991 * and will never use a different cred. 6992 */ 6993 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 6994 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 6995 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 6996 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 6997 dfprintk(MOUNT, "sp4_mach_cred:\n"); 6998 dfprintk(MOUNT, " minimal mode enabled\n"); 6999 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags); 7000 } else { 7001 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 7002 return -EINVAL; 7003 } 7004 7005 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 7006 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 7007 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 7008 test_bit(OP_LOCKU, sp->allow.u.longs)) { 7009 dfprintk(MOUNT, " cleanup mode enabled\n"); 7010 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags); 7011 } 7012 7013 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 7014 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 7015 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, 7016 &clp->cl_sp4_flags); 7017 } 7018 7019 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 7020 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 7021 dfprintk(MOUNT, " secinfo mode enabled\n"); 7022 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags); 7023 } 7024 7025 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 7026 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 7027 dfprintk(MOUNT, " stateid mode enabled\n"); 7028 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags); 7029 } 7030 7031 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 7032 dfprintk(MOUNT, " write mode enabled\n"); 7033 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags); 7034 } 7035 7036 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 7037 dfprintk(MOUNT, " commit mode enabled\n"); 7038 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags); 7039 } 7040 } 7041 7042 return 0; 7043 } 7044 7045 /* 7046 * _nfs4_proc_exchange_id() 7047 * 7048 * Wrapper for EXCHANGE_ID operation. 7049 */ 7050 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred, 7051 u32 sp4_how) 7052 { 7053 nfs4_verifier verifier; 7054 struct nfs41_exchange_id_args args = { 7055 .verifier = &verifier, 7056 .client = clp, 7057 #ifdef CONFIG_NFS_V4_1_MIGRATION 7058 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 7059 EXCHGID4_FLAG_BIND_PRINC_STATEID | 7060 EXCHGID4_FLAG_SUPP_MOVED_MIGR, 7061 #else 7062 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 7063 EXCHGID4_FLAG_BIND_PRINC_STATEID, 7064 #endif 7065 }; 7066 struct nfs41_exchange_id_res res = { 7067 0 7068 }; 7069 int status; 7070 struct rpc_message msg = { 7071 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 7072 .rpc_argp = &args, 7073 .rpc_resp = &res, 7074 .rpc_cred = cred, 7075 }; 7076 7077 nfs4_init_boot_verifier(clp, &verifier); 7078 7079 status = nfs4_init_uniform_client_string(clp); 7080 if (status) 7081 goto out; 7082 7083 dprintk("NFS call exchange_id auth=%s, '%s'\n", 7084 clp->cl_rpcclient->cl_auth->au_ops->au_name, 7085 clp->cl_owner_id); 7086 7087 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 7088 GFP_NOFS); 7089 if (unlikely(res.server_owner == NULL)) { 7090 status = -ENOMEM; 7091 goto out; 7092 } 7093 7094 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 7095 GFP_NOFS); 7096 if (unlikely(res.server_scope == NULL)) { 7097 status = -ENOMEM; 7098 goto out_server_owner; 7099 } 7100 7101 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 7102 if (unlikely(res.impl_id == NULL)) { 7103 status = -ENOMEM; 7104 goto out_server_scope; 7105 } 7106 7107 switch (sp4_how) { 7108 case SP4_NONE: 7109 args.state_protect.how = SP4_NONE; 7110 break; 7111 7112 case SP4_MACH_CRED: 7113 args.state_protect = nfs4_sp4_mach_cred_request; 7114 break; 7115 7116 default: 7117 /* unsupported! */ 7118 WARN_ON_ONCE(1); 7119 status = -EINVAL; 7120 goto out_impl_id; 7121 } 7122 7123 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 7124 trace_nfs4_exchange_id(clp, status); 7125 if (status == 0) 7126 status = nfs4_check_cl_exchange_flags(res.flags); 7127 7128 if (status == 0) 7129 status = nfs4_sp4_select_mode(clp, &res.state_protect); 7130 7131 if (status == 0) { 7132 clp->cl_clientid = res.clientid; 7133 clp->cl_exchange_flags = res.flags; 7134 /* Client ID is not confirmed */ 7135 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) { 7136 clear_bit(NFS4_SESSION_ESTABLISHED, 7137 &clp->cl_session->session_state); 7138 clp->cl_seqid = res.seqid; 7139 } 7140 7141 kfree(clp->cl_serverowner); 7142 clp->cl_serverowner = res.server_owner; 7143 res.server_owner = NULL; 7144 7145 /* use the most recent implementation id */ 7146 kfree(clp->cl_implid); 7147 clp->cl_implid = res.impl_id; 7148 res.impl_id = NULL; 7149 7150 if (clp->cl_serverscope != NULL && 7151 !nfs41_same_server_scope(clp->cl_serverscope, 7152 res.server_scope)) { 7153 dprintk("%s: server_scope mismatch detected\n", 7154 __func__); 7155 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 7156 kfree(clp->cl_serverscope); 7157 clp->cl_serverscope = NULL; 7158 } 7159 7160 if (clp->cl_serverscope == NULL) { 7161 clp->cl_serverscope = res.server_scope; 7162 res.server_scope = NULL; 7163 } 7164 } 7165 7166 out_impl_id: 7167 kfree(res.impl_id); 7168 out_server_scope: 7169 kfree(res.server_scope); 7170 out_server_owner: 7171 kfree(res.server_owner); 7172 out: 7173 if (clp->cl_implid != NULL) 7174 dprintk("NFS reply exchange_id: Server Implementation ID: " 7175 "domain: %s, name: %s, date: %llu,%u\n", 7176 clp->cl_implid->domain, clp->cl_implid->name, 7177 clp->cl_implid->date.seconds, 7178 clp->cl_implid->date.nseconds); 7179 dprintk("NFS reply exchange_id: %d\n", status); 7180 return status; 7181 } 7182 7183 /* 7184 * nfs4_proc_exchange_id() 7185 * 7186 * Returns zero, a negative errno, or a negative NFS4ERR status code. 7187 * 7188 * Since the clientid has expired, all compounds using sessions 7189 * associated with the stale clientid will be returning 7190 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 7191 * be in some phase of session reset. 7192 * 7193 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 7194 */ 7195 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) 7196 { 7197 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 7198 int status; 7199 7200 /* try SP4_MACH_CRED if krb5i/p */ 7201 if (authflavor == RPC_AUTH_GSS_KRB5I || 7202 authflavor == RPC_AUTH_GSS_KRB5P) { 7203 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 7204 if (!status) 7205 return 0; 7206 } 7207 7208 /* try SP4_NONE */ 7209 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 7210 } 7211 7212 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 7213 struct rpc_cred *cred) 7214 { 7215 struct rpc_message msg = { 7216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 7217 .rpc_argp = clp, 7218 .rpc_cred = cred, 7219 }; 7220 int status; 7221 7222 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 7223 trace_nfs4_destroy_clientid(clp, status); 7224 if (status) 7225 dprintk("NFS: Got error %d from the server %s on " 7226 "DESTROY_CLIENTID.", status, clp->cl_hostname); 7227 return status; 7228 } 7229 7230 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 7231 struct rpc_cred *cred) 7232 { 7233 unsigned int loop; 7234 int ret; 7235 7236 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 7237 ret = _nfs4_proc_destroy_clientid(clp, cred); 7238 switch (ret) { 7239 case -NFS4ERR_DELAY: 7240 case -NFS4ERR_CLIENTID_BUSY: 7241 ssleep(1); 7242 break; 7243 default: 7244 return ret; 7245 } 7246 } 7247 return 0; 7248 } 7249 7250 int nfs4_destroy_clientid(struct nfs_client *clp) 7251 { 7252 struct rpc_cred *cred; 7253 int ret = 0; 7254 7255 if (clp->cl_mvops->minor_version < 1) 7256 goto out; 7257 if (clp->cl_exchange_flags == 0) 7258 goto out; 7259 if (clp->cl_preserve_clid) 7260 goto out; 7261 cred = nfs4_get_clid_cred(clp); 7262 ret = nfs4_proc_destroy_clientid(clp, cred); 7263 if (cred) 7264 put_rpccred(cred); 7265 switch (ret) { 7266 case 0: 7267 case -NFS4ERR_STALE_CLIENTID: 7268 clp->cl_exchange_flags = 0; 7269 } 7270 out: 7271 return ret; 7272 } 7273 7274 struct nfs4_get_lease_time_data { 7275 struct nfs4_get_lease_time_args *args; 7276 struct nfs4_get_lease_time_res *res; 7277 struct nfs_client *clp; 7278 }; 7279 7280 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 7281 void *calldata) 7282 { 7283 struct nfs4_get_lease_time_data *data = 7284 (struct nfs4_get_lease_time_data *)calldata; 7285 7286 dprintk("--> %s\n", __func__); 7287 /* just setup sequence, do not trigger session recovery 7288 since we're invoked within one */ 7289 nfs41_setup_sequence(data->clp->cl_session, 7290 &data->args->la_seq_args, 7291 &data->res->lr_seq_res, 7292 task); 7293 dprintk("<-- %s\n", __func__); 7294 } 7295 7296 /* 7297 * Called from nfs4_state_manager thread for session setup, so don't recover 7298 * from sequence operation or clientid errors. 7299 */ 7300 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 7301 { 7302 struct nfs4_get_lease_time_data *data = 7303 (struct nfs4_get_lease_time_data *)calldata; 7304 7305 dprintk("--> %s\n", __func__); 7306 if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) 7307 return; 7308 switch (task->tk_status) { 7309 case -NFS4ERR_DELAY: 7310 case -NFS4ERR_GRACE: 7311 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 7312 rpc_delay(task, NFS4_POLL_RETRY_MIN); 7313 task->tk_status = 0; 7314 /* fall through */ 7315 case -NFS4ERR_RETRY_UNCACHED_REP: 7316 rpc_restart_call_prepare(task); 7317 return; 7318 } 7319 dprintk("<-- %s\n", __func__); 7320 } 7321 7322 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 7323 .rpc_call_prepare = nfs4_get_lease_time_prepare, 7324 .rpc_call_done = nfs4_get_lease_time_done, 7325 }; 7326 7327 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 7328 { 7329 struct rpc_task *task; 7330 struct nfs4_get_lease_time_args args; 7331 struct nfs4_get_lease_time_res res = { 7332 .lr_fsinfo = fsinfo, 7333 }; 7334 struct nfs4_get_lease_time_data data = { 7335 .args = &args, 7336 .res = &res, 7337 .clp = clp, 7338 }; 7339 struct rpc_message msg = { 7340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 7341 .rpc_argp = &args, 7342 .rpc_resp = &res, 7343 }; 7344 struct rpc_task_setup task_setup = { 7345 .rpc_client = clp->cl_rpcclient, 7346 .rpc_message = &msg, 7347 .callback_ops = &nfs4_get_lease_time_ops, 7348 .callback_data = &data, 7349 .flags = RPC_TASK_TIMEOUT, 7350 }; 7351 int status; 7352 7353 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0); 7354 nfs4_set_sequence_privileged(&args.la_seq_args); 7355 dprintk("--> %s\n", __func__); 7356 task = rpc_run_task(&task_setup); 7357 7358 if (IS_ERR(task)) 7359 status = PTR_ERR(task); 7360 else { 7361 status = task->tk_status; 7362 rpc_put_task(task); 7363 } 7364 dprintk("<-- %s return %d\n", __func__, status); 7365 7366 return status; 7367 } 7368 7369 /* 7370 * Initialize the values to be used by the client in CREATE_SESSION 7371 * If nfs4_init_session set the fore channel request and response sizes, 7372 * use them. 7373 * 7374 * Set the back channel max_resp_sz_cached to zero to force the client to 7375 * always set csa_cachethis to FALSE because the current implementation 7376 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 7377 */ 7378 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 7379 struct rpc_clnt *clnt) 7380 { 7381 unsigned int max_rqst_sz, max_resp_sz; 7382 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 7383 7384 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 7385 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 7386 7387 /* Fore channel attributes */ 7388 args->fc_attrs.max_rqst_sz = max_rqst_sz; 7389 args->fc_attrs.max_resp_sz = max_resp_sz; 7390 args->fc_attrs.max_ops = NFS4_MAX_OPS; 7391 args->fc_attrs.max_reqs = max_session_slots; 7392 7393 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 7394 "max_ops=%u max_reqs=%u\n", 7395 __func__, 7396 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 7397 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 7398 7399 /* Back channel attributes */ 7400 args->bc_attrs.max_rqst_sz = max_bc_payload; 7401 args->bc_attrs.max_resp_sz = max_bc_payload; 7402 args->bc_attrs.max_resp_sz_cached = 0; 7403 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 7404 args->bc_attrs.max_reqs = NFS41_BC_MAX_CALLBACKS; 7405 7406 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 7407 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 7408 __func__, 7409 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 7410 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 7411 args->bc_attrs.max_reqs); 7412 } 7413 7414 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 7415 struct nfs41_create_session_res *res) 7416 { 7417 struct nfs4_channel_attrs *sent = &args->fc_attrs; 7418 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 7419 7420 if (rcvd->max_resp_sz > sent->max_resp_sz) 7421 return -EINVAL; 7422 /* 7423 * Our requested max_ops is the minimum we need; we're not 7424 * prepared to break up compounds into smaller pieces than that. 7425 * So, no point even trying to continue if the server won't 7426 * cooperate: 7427 */ 7428 if (rcvd->max_ops < sent->max_ops) 7429 return -EINVAL; 7430 if (rcvd->max_reqs == 0) 7431 return -EINVAL; 7432 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 7433 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 7434 return 0; 7435 } 7436 7437 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 7438 struct nfs41_create_session_res *res) 7439 { 7440 struct nfs4_channel_attrs *sent = &args->bc_attrs; 7441 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 7442 7443 if (!(res->flags & SESSION4_BACK_CHAN)) 7444 goto out; 7445 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 7446 return -EINVAL; 7447 if (rcvd->max_resp_sz < sent->max_resp_sz) 7448 return -EINVAL; 7449 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 7450 return -EINVAL; 7451 /* These would render the backchannel useless: */ 7452 if (rcvd->max_ops != sent->max_ops) 7453 return -EINVAL; 7454 if (rcvd->max_reqs != sent->max_reqs) 7455 return -EINVAL; 7456 out: 7457 return 0; 7458 } 7459 7460 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 7461 struct nfs41_create_session_res *res) 7462 { 7463 int ret; 7464 7465 ret = nfs4_verify_fore_channel_attrs(args, res); 7466 if (ret) 7467 return ret; 7468 return nfs4_verify_back_channel_attrs(args, res); 7469 } 7470 7471 static void nfs4_update_session(struct nfs4_session *session, 7472 struct nfs41_create_session_res *res) 7473 { 7474 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 7475 /* Mark client id and session as being confirmed */ 7476 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 7477 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 7478 session->flags = res->flags; 7479 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 7480 if (res->flags & SESSION4_BACK_CHAN) 7481 memcpy(&session->bc_attrs, &res->bc_attrs, 7482 sizeof(session->bc_attrs)); 7483 } 7484 7485 static int _nfs4_proc_create_session(struct nfs_client *clp, 7486 struct rpc_cred *cred) 7487 { 7488 struct nfs4_session *session = clp->cl_session; 7489 struct nfs41_create_session_args args = { 7490 .client = clp, 7491 .clientid = clp->cl_clientid, 7492 .seqid = clp->cl_seqid, 7493 .cb_program = NFS4_CALLBACK, 7494 }; 7495 struct nfs41_create_session_res res; 7496 7497 struct rpc_message msg = { 7498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 7499 .rpc_argp = &args, 7500 .rpc_resp = &res, 7501 .rpc_cred = cred, 7502 }; 7503 int status; 7504 7505 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 7506 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 7507 7508 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 7509 trace_nfs4_create_session(clp, status); 7510 7511 if (!status) { 7512 /* Verify the session's negotiated channel_attrs values */ 7513 status = nfs4_verify_channel_attrs(&args, &res); 7514 /* Increment the clientid slot sequence id */ 7515 if (clp->cl_seqid == res.seqid) 7516 clp->cl_seqid++; 7517 if (status) 7518 goto out; 7519 nfs4_update_session(session, &res); 7520 } 7521 out: 7522 return status; 7523 } 7524 7525 /* 7526 * Issues a CREATE_SESSION operation to the server. 7527 * It is the responsibility of the caller to verify the session is 7528 * expired before calling this routine. 7529 */ 7530 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred) 7531 { 7532 int status; 7533 unsigned *ptr; 7534 struct nfs4_session *session = clp->cl_session; 7535 7536 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 7537 7538 status = _nfs4_proc_create_session(clp, cred); 7539 if (status) 7540 goto out; 7541 7542 /* Init or reset the session slot tables */ 7543 status = nfs4_setup_session_slot_tables(session); 7544 dprintk("slot table setup returned %d\n", status); 7545 if (status) 7546 goto out; 7547 7548 ptr = (unsigned *)&session->sess_id.data[0]; 7549 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 7550 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 7551 out: 7552 dprintk("<-- %s\n", __func__); 7553 return status; 7554 } 7555 7556 /* 7557 * Issue the over-the-wire RPC DESTROY_SESSION. 7558 * The caller must serialize access to this routine. 7559 */ 7560 int nfs4_proc_destroy_session(struct nfs4_session *session, 7561 struct rpc_cred *cred) 7562 { 7563 struct rpc_message msg = { 7564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 7565 .rpc_argp = session, 7566 .rpc_cred = cred, 7567 }; 7568 int status = 0; 7569 7570 dprintk("--> nfs4_proc_destroy_session\n"); 7571 7572 /* session is still being setup */ 7573 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 7574 return 0; 7575 7576 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 7577 trace_nfs4_destroy_session(session->clp, status); 7578 7579 if (status) 7580 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 7581 "Session has been destroyed regardless...\n", status); 7582 7583 dprintk("<-- nfs4_proc_destroy_session\n"); 7584 return status; 7585 } 7586 7587 /* 7588 * Renew the cl_session lease. 7589 */ 7590 struct nfs4_sequence_data { 7591 struct nfs_client *clp; 7592 struct nfs4_sequence_args args; 7593 struct nfs4_sequence_res res; 7594 }; 7595 7596 static void nfs41_sequence_release(void *data) 7597 { 7598 struct nfs4_sequence_data *calldata = data; 7599 struct nfs_client *clp = calldata->clp; 7600 7601 if (atomic_read(&clp->cl_count) > 1) 7602 nfs4_schedule_state_renewal(clp); 7603 nfs_put_client(clp); 7604 kfree(calldata); 7605 } 7606 7607 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 7608 { 7609 switch(task->tk_status) { 7610 case -NFS4ERR_DELAY: 7611 rpc_delay(task, NFS4_POLL_RETRY_MAX); 7612 return -EAGAIN; 7613 default: 7614 nfs4_schedule_lease_recovery(clp); 7615 } 7616 return 0; 7617 } 7618 7619 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 7620 { 7621 struct nfs4_sequence_data *calldata = data; 7622 struct nfs_client *clp = calldata->clp; 7623 7624 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 7625 return; 7626 7627 trace_nfs4_sequence(clp, task->tk_status); 7628 if (task->tk_status < 0) { 7629 dprintk("%s ERROR %d\n", __func__, task->tk_status); 7630 if (atomic_read(&clp->cl_count) == 1) 7631 goto out; 7632 7633 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 7634 rpc_restart_call_prepare(task); 7635 return; 7636 } 7637 } 7638 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 7639 out: 7640 dprintk("<-- %s\n", __func__); 7641 } 7642 7643 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 7644 { 7645 struct nfs4_sequence_data *calldata = data; 7646 struct nfs_client *clp = calldata->clp; 7647 struct nfs4_sequence_args *args; 7648 struct nfs4_sequence_res *res; 7649 7650 args = task->tk_msg.rpc_argp; 7651 res = task->tk_msg.rpc_resp; 7652 7653 nfs41_setup_sequence(clp->cl_session, args, res, task); 7654 } 7655 7656 static const struct rpc_call_ops nfs41_sequence_ops = { 7657 .rpc_call_done = nfs41_sequence_call_done, 7658 .rpc_call_prepare = nfs41_sequence_prepare, 7659 .rpc_release = nfs41_sequence_release, 7660 }; 7661 7662 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 7663 struct rpc_cred *cred, 7664 bool is_privileged) 7665 { 7666 struct nfs4_sequence_data *calldata; 7667 struct rpc_message msg = { 7668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 7669 .rpc_cred = cred, 7670 }; 7671 struct rpc_task_setup task_setup_data = { 7672 .rpc_client = clp->cl_rpcclient, 7673 .rpc_message = &msg, 7674 .callback_ops = &nfs41_sequence_ops, 7675 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 7676 }; 7677 7678 if (!atomic_inc_not_zero(&clp->cl_count)) 7679 return ERR_PTR(-EIO); 7680 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 7681 if (calldata == NULL) { 7682 nfs_put_client(clp); 7683 return ERR_PTR(-ENOMEM); 7684 } 7685 nfs4_init_sequence(&calldata->args, &calldata->res, 0); 7686 if (is_privileged) 7687 nfs4_set_sequence_privileged(&calldata->args); 7688 msg.rpc_argp = &calldata->args; 7689 msg.rpc_resp = &calldata->res; 7690 calldata->clp = clp; 7691 task_setup_data.callback_data = calldata; 7692 7693 return rpc_run_task(&task_setup_data); 7694 } 7695 7696 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) 7697 { 7698 struct rpc_task *task; 7699 int ret = 0; 7700 7701 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 7702 return -EAGAIN; 7703 task = _nfs41_proc_sequence(clp, cred, false); 7704 if (IS_ERR(task)) 7705 ret = PTR_ERR(task); 7706 else 7707 rpc_put_task_async(task); 7708 dprintk("<-- %s status=%d\n", __func__, ret); 7709 return ret; 7710 } 7711 7712 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) 7713 { 7714 struct rpc_task *task; 7715 int ret; 7716 7717 task = _nfs41_proc_sequence(clp, cred, true); 7718 if (IS_ERR(task)) { 7719 ret = PTR_ERR(task); 7720 goto out; 7721 } 7722 ret = rpc_wait_for_completion_task(task); 7723 if (!ret) 7724 ret = task->tk_status; 7725 rpc_put_task(task); 7726 out: 7727 dprintk("<-- %s status=%d\n", __func__, ret); 7728 return ret; 7729 } 7730 7731 struct nfs4_reclaim_complete_data { 7732 struct nfs_client *clp; 7733 struct nfs41_reclaim_complete_args arg; 7734 struct nfs41_reclaim_complete_res res; 7735 }; 7736 7737 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 7738 { 7739 struct nfs4_reclaim_complete_data *calldata = data; 7740 7741 nfs41_setup_sequence(calldata->clp->cl_session, 7742 &calldata->arg.seq_args, 7743 &calldata->res.seq_res, 7744 task); 7745 } 7746 7747 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 7748 { 7749 switch(task->tk_status) { 7750 case 0: 7751 case -NFS4ERR_COMPLETE_ALREADY: 7752 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 7753 break; 7754 case -NFS4ERR_DELAY: 7755 rpc_delay(task, NFS4_POLL_RETRY_MAX); 7756 /* fall through */ 7757 case -NFS4ERR_RETRY_UNCACHED_REP: 7758 return -EAGAIN; 7759 default: 7760 nfs4_schedule_lease_recovery(clp); 7761 } 7762 return 0; 7763 } 7764 7765 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 7766 { 7767 struct nfs4_reclaim_complete_data *calldata = data; 7768 struct nfs_client *clp = calldata->clp; 7769 struct nfs4_sequence_res *res = &calldata->res.seq_res; 7770 7771 dprintk("--> %s\n", __func__); 7772 if (!nfs41_sequence_done(task, res)) 7773 return; 7774 7775 trace_nfs4_reclaim_complete(clp, task->tk_status); 7776 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 7777 rpc_restart_call_prepare(task); 7778 return; 7779 } 7780 dprintk("<-- %s\n", __func__); 7781 } 7782 7783 static void nfs4_free_reclaim_complete_data(void *data) 7784 { 7785 struct nfs4_reclaim_complete_data *calldata = data; 7786 7787 kfree(calldata); 7788 } 7789 7790 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 7791 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 7792 .rpc_call_done = nfs4_reclaim_complete_done, 7793 .rpc_release = nfs4_free_reclaim_complete_data, 7794 }; 7795 7796 /* 7797 * Issue a global reclaim complete. 7798 */ 7799 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 7800 struct rpc_cred *cred) 7801 { 7802 struct nfs4_reclaim_complete_data *calldata; 7803 struct rpc_task *task; 7804 struct rpc_message msg = { 7805 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 7806 .rpc_cred = cred, 7807 }; 7808 struct rpc_task_setup task_setup_data = { 7809 .rpc_client = clp->cl_rpcclient, 7810 .rpc_message = &msg, 7811 .callback_ops = &nfs4_reclaim_complete_call_ops, 7812 .flags = RPC_TASK_ASYNC, 7813 }; 7814 int status = -ENOMEM; 7815 7816 dprintk("--> %s\n", __func__); 7817 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 7818 if (calldata == NULL) 7819 goto out; 7820 calldata->clp = clp; 7821 calldata->arg.one_fs = 0; 7822 7823 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0); 7824 nfs4_set_sequence_privileged(&calldata->arg.seq_args); 7825 msg.rpc_argp = &calldata->arg; 7826 msg.rpc_resp = &calldata->res; 7827 task_setup_data.callback_data = calldata; 7828 task = rpc_run_task(&task_setup_data); 7829 if (IS_ERR(task)) { 7830 status = PTR_ERR(task); 7831 goto out; 7832 } 7833 status = nfs4_wait_for_completion_rpc_task(task); 7834 if (status == 0) 7835 status = task->tk_status; 7836 rpc_put_task(task); 7837 return 0; 7838 out: 7839 dprintk("<-- %s status=%d\n", __func__, status); 7840 return status; 7841 } 7842 7843 static void 7844 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 7845 { 7846 struct nfs4_layoutget *lgp = calldata; 7847 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 7848 struct nfs4_session *session = nfs4_get_session(server); 7849 7850 dprintk("--> %s\n", __func__); 7851 nfs41_setup_sequence(session, &lgp->args.seq_args, 7852 &lgp->res.seq_res, task); 7853 dprintk("<-- %s\n", __func__); 7854 } 7855 7856 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 7857 { 7858 struct nfs4_layoutget *lgp = calldata; 7859 7860 dprintk("--> %s\n", __func__); 7861 nfs41_sequence_done(task, &lgp->res.seq_res); 7862 dprintk("<-- %s\n", __func__); 7863 } 7864 7865 static int 7866 nfs4_layoutget_handle_exception(struct rpc_task *task, 7867 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 7868 { 7869 struct inode *inode = lgp->args.inode; 7870 struct nfs_server *server = NFS_SERVER(inode); 7871 struct pnfs_layout_hdr *lo; 7872 int status = task->tk_status; 7873 7874 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 7875 7876 switch (status) { 7877 case 0: 7878 goto out; 7879 7880 /* 7881 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 7882 * on the file. set tk_status to -ENODATA to tell upper layer to 7883 * retry go inband. 7884 */ 7885 case -NFS4ERR_LAYOUTUNAVAILABLE: 7886 status = -ENODATA; 7887 goto out; 7888 /* 7889 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 7890 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 7891 */ 7892 case -NFS4ERR_BADLAYOUT: 7893 status = -EOVERFLOW; 7894 goto out; 7895 /* 7896 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 7897 * (or clients) writing to the same RAID stripe except when 7898 * the minlength argument is 0 (see RFC5661 section 18.43.3). 7899 * 7900 * Treat it like we would RECALLCONFLICT -- we retry for a little 7901 * while, and then eventually give up. 7902 */ 7903 case -NFS4ERR_LAYOUTTRYLATER: 7904 if (lgp->args.minlength == 0) { 7905 status = -EOVERFLOW; 7906 goto out; 7907 } 7908 /* Fallthrough */ 7909 case -NFS4ERR_RECALLCONFLICT: 7910 nfs4_handle_exception(server, -NFS4ERR_RECALLCONFLICT, 7911 exception); 7912 status = -ERECALLCONFLICT; 7913 goto out; 7914 case -NFS4ERR_EXPIRED: 7915 case -NFS4ERR_BAD_STATEID: 7916 exception->timeout = 0; 7917 spin_lock(&inode->i_lock); 7918 if (nfs4_stateid_match(&lgp->args.stateid, 7919 &lgp->args.ctx->state->stateid)) { 7920 spin_unlock(&inode->i_lock); 7921 /* If the open stateid was bad, then recover it. */ 7922 exception->state = lgp->args.ctx->state; 7923 break; 7924 } 7925 lo = NFS_I(inode)->layout; 7926 if (lo && !test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) && 7927 nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) { 7928 LIST_HEAD(head); 7929 7930 /* 7931 * Mark the bad layout state as invalid, then retry 7932 * with the current stateid. 7933 */ 7934 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags); 7935 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL, 0); 7936 spin_unlock(&inode->i_lock); 7937 pnfs_free_lseg_list(&head); 7938 status = -EAGAIN; 7939 goto out; 7940 } else 7941 spin_unlock(&inode->i_lock); 7942 } 7943 7944 status = nfs4_handle_exception(server, status, exception); 7945 if (exception->retry) 7946 status = -EAGAIN; 7947 out: 7948 dprintk("<-- %s\n", __func__); 7949 return status; 7950 } 7951 7952 static size_t max_response_pages(struct nfs_server *server) 7953 { 7954 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 7955 return nfs_page_array_len(0, max_resp_sz); 7956 } 7957 7958 static void nfs4_free_pages(struct page **pages, size_t size) 7959 { 7960 int i; 7961 7962 if (!pages) 7963 return; 7964 7965 for (i = 0; i < size; i++) { 7966 if (!pages[i]) 7967 break; 7968 __free_page(pages[i]); 7969 } 7970 kfree(pages); 7971 } 7972 7973 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags) 7974 { 7975 struct page **pages; 7976 int i; 7977 7978 pages = kcalloc(size, sizeof(struct page *), gfp_flags); 7979 if (!pages) { 7980 dprintk("%s: can't alloc array of %zu pages\n", __func__, size); 7981 return NULL; 7982 } 7983 7984 for (i = 0; i < size; i++) { 7985 pages[i] = alloc_page(gfp_flags); 7986 if (!pages[i]) { 7987 dprintk("%s: failed to allocate page\n", __func__); 7988 nfs4_free_pages(pages, size); 7989 return NULL; 7990 } 7991 } 7992 7993 return pages; 7994 } 7995 7996 static void nfs4_layoutget_release(void *calldata) 7997 { 7998 struct nfs4_layoutget *lgp = calldata; 7999 struct inode *inode = lgp->args.inode; 8000 struct nfs_server *server = NFS_SERVER(inode); 8001 size_t max_pages = max_response_pages(server); 8002 8003 dprintk("--> %s\n", __func__); 8004 nfs4_free_pages(lgp->args.layout.pages, max_pages); 8005 pnfs_put_layout_hdr(NFS_I(inode)->layout); 8006 put_nfs_open_context(lgp->args.ctx); 8007 kfree(calldata); 8008 dprintk("<-- %s\n", __func__); 8009 } 8010 8011 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 8012 .rpc_call_prepare = nfs4_layoutget_prepare, 8013 .rpc_call_done = nfs4_layoutget_done, 8014 .rpc_release = nfs4_layoutget_release, 8015 }; 8016 8017 struct pnfs_layout_segment * 8018 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags) 8019 { 8020 struct inode *inode = lgp->args.inode; 8021 struct nfs_server *server = NFS_SERVER(inode); 8022 size_t max_pages = max_response_pages(server); 8023 struct rpc_task *task; 8024 struct rpc_message msg = { 8025 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 8026 .rpc_argp = &lgp->args, 8027 .rpc_resp = &lgp->res, 8028 .rpc_cred = lgp->cred, 8029 }; 8030 struct rpc_task_setup task_setup_data = { 8031 .rpc_client = server->client, 8032 .rpc_message = &msg, 8033 .callback_ops = &nfs4_layoutget_call_ops, 8034 .callback_data = lgp, 8035 .flags = RPC_TASK_ASYNC, 8036 }; 8037 struct pnfs_layout_segment *lseg = NULL; 8038 struct nfs4_exception exception = { 8039 .inode = inode, 8040 .timeout = *timeout, 8041 }; 8042 int status = 0; 8043 8044 dprintk("--> %s\n", __func__); 8045 8046 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ 8047 pnfs_get_layout_hdr(NFS_I(inode)->layout); 8048 8049 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags); 8050 if (!lgp->args.layout.pages) { 8051 nfs4_layoutget_release(lgp); 8052 return ERR_PTR(-ENOMEM); 8053 } 8054 lgp->args.layout.pglen = max_pages * PAGE_SIZE; 8055 8056 lgp->res.layoutp = &lgp->args.layout; 8057 lgp->res.seq_res.sr_slot = NULL; 8058 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0); 8059 8060 task = rpc_run_task(&task_setup_data); 8061 if (IS_ERR(task)) 8062 return ERR_CAST(task); 8063 status = nfs4_wait_for_completion_rpc_task(task); 8064 if (status == 0) { 8065 status = nfs4_layoutget_handle_exception(task, lgp, &exception); 8066 *timeout = exception.timeout; 8067 } 8068 8069 trace_nfs4_layoutget(lgp->args.ctx, 8070 &lgp->args.range, 8071 &lgp->res.range, 8072 &lgp->res.stateid, 8073 status); 8074 8075 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */ 8076 if (status == 0 && lgp->res.layoutp->len) 8077 lseg = pnfs_layout_process(lgp); 8078 rpc_put_task(task); 8079 dprintk("<-- %s status=%d\n", __func__, status); 8080 if (status) 8081 return ERR_PTR(status); 8082 return lseg; 8083 } 8084 8085 static void 8086 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 8087 { 8088 struct nfs4_layoutreturn *lrp = calldata; 8089 8090 dprintk("--> %s\n", __func__); 8091 nfs41_setup_sequence(lrp->clp->cl_session, 8092 &lrp->args.seq_args, 8093 &lrp->res.seq_res, 8094 task); 8095 } 8096 8097 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 8098 { 8099 struct nfs4_layoutreturn *lrp = calldata; 8100 struct nfs_server *server; 8101 8102 dprintk("--> %s\n", __func__); 8103 8104 if (!nfs41_sequence_done(task, &lrp->res.seq_res)) 8105 return; 8106 8107 server = NFS_SERVER(lrp->args.inode); 8108 switch (task->tk_status) { 8109 default: 8110 task->tk_status = 0; 8111 case 0: 8112 break; 8113 case -NFS4ERR_DELAY: 8114 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 8115 break; 8116 rpc_restart_call_prepare(task); 8117 return; 8118 } 8119 dprintk("<-- %s\n", __func__); 8120 } 8121 8122 static void nfs4_layoutreturn_release(void *calldata) 8123 { 8124 struct nfs4_layoutreturn *lrp = calldata; 8125 struct pnfs_layout_hdr *lo = lrp->args.layout; 8126 LIST_HEAD(freeme); 8127 8128 dprintk("--> %s\n", __func__); 8129 spin_lock(&lo->plh_inode->i_lock); 8130 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range, 8131 be32_to_cpu(lrp->args.stateid.seqid)); 8132 pnfs_mark_layout_returned_if_empty(lo); 8133 if (lrp->res.lrs_present) 8134 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true); 8135 pnfs_clear_layoutreturn_waitbit(lo); 8136 spin_unlock(&lo->plh_inode->i_lock); 8137 pnfs_free_lseg_list(&freeme); 8138 pnfs_put_layout_hdr(lrp->args.layout); 8139 nfs_iput_and_deactive(lrp->inode); 8140 kfree(calldata); 8141 dprintk("<-- %s\n", __func__); 8142 } 8143 8144 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 8145 .rpc_call_prepare = nfs4_layoutreturn_prepare, 8146 .rpc_call_done = nfs4_layoutreturn_done, 8147 .rpc_release = nfs4_layoutreturn_release, 8148 }; 8149 8150 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 8151 { 8152 struct rpc_task *task; 8153 struct rpc_message msg = { 8154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 8155 .rpc_argp = &lrp->args, 8156 .rpc_resp = &lrp->res, 8157 .rpc_cred = lrp->cred, 8158 }; 8159 struct rpc_task_setup task_setup_data = { 8160 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 8161 .rpc_message = &msg, 8162 .callback_ops = &nfs4_layoutreturn_call_ops, 8163 .callback_data = lrp, 8164 }; 8165 int status = 0; 8166 8167 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 8168 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 8169 &task_setup_data.rpc_client, &msg); 8170 8171 dprintk("--> %s\n", __func__); 8172 if (!sync) { 8173 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 8174 if (!lrp->inode) { 8175 nfs4_layoutreturn_release(lrp); 8176 return -EAGAIN; 8177 } 8178 task_setup_data.flags |= RPC_TASK_ASYNC; 8179 } 8180 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1); 8181 task = rpc_run_task(&task_setup_data); 8182 if (IS_ERR(task)) 8183 return PTR_ERR(task); 8184 if (sync) 8185 status = task->tk_status; 8186 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 8187 dprintk("<-- %s status=%d\n", __func__, status); 8188 rpc_put_task(task); 8189 return status; 8190 } 8191 8192 static int 8193 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 8194 struct pnfs_device *pdev, 8195 struct rpc_cred *cred) 8196 { 8197 struct nfs4_getdeviceinfo_args args = { 8198 .pdev = pdev, 8199 .notify_types = NOTIFY_DEVICEID4_CHANGE | 8200 NOTIFY_DEVICEID4_DELETE, 8201 }; 8202 struct nfs4_getdeviceinfo_res res = { 8203 .pdev = pdev, 8204 }; 8205 struct rpc_message msg = { 8206 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 8207 .rpc_argp = &args, 8208 .rpc_resp = &res, 8209 .rpc_cred = cred, 8210 }; 8211 int status; 8212 8213 dprintk("--> %s\n", __func__); 8214 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 8215 if (res.notification & ~args.notify_types) 8216 dprintk("%s: unsupported notification\n", __func__); 8217 if (res.notification != args.notify_types) 8218 pdev->nocache = 1; 8219 8220 dprintk("<-- %s status=%d\n", __func__, status); 8221 8222 return status; 8223 } 8224 8225 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 8226 struct pnfs_device *pdev, 8227 struct rpc_cred *cred) 8228 { 8229 struct nfs4_exception exception = { }; 8230 int err; 8231 8232 do { 8233 err = nfs4_handle_exception(server, 8234 _nfs4_proc_getdeviceinfo(server, pdev, cred), 8235 &exception); 8236 } while (exception.retry); 8237 return err; 8238 } 8239 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 8240 8241 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 8242 { 8243 struct nfs4_layoutcommit_data *data = calldata; 8244 struct nfs_server *server = NFS_SERVER(data->args.inode); 8245 struct nfs4_session *session = nfs4_get_session(server); 8246 8247 nfs41_setup_sequence(session, 8248 &data->args.seq_args, 8249 &data->res.seq_res, 8250 task); 8251 } 8252 8253 static void 8254 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 8255 { 8256 struct nfs4_layoutcommit_data *data = calldata; 8257 struct nfs_server *server = NFS_SERVER(data->args.inode); 8258 8259 if (!nfs41_sequence_done(task, &data->res.seq_res)) 8260 return; 8261 8262 switch (task->tk_status) { /* Just ignore these failures */ 8263 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 8264 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 8265 case -NFS4ERR_BADLAYOUT: /* no layout */ 8266 case -NFS4ERR_GRACE: /* loca_recalim always false */ 8267 task->tk_status = 0; 8268 case 0: 8269 break; 8270 default: 8271 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 8272 rpc_restart_call_prepare(task); 8273 return; 8274 } 8275 } 8276 } 8277 8278 static void nfs4_layoutcommit_release(void *calldata) 8279 { 8280 struct nfs4_layoutcommit_data *data = calldata; 8281 8282 pnfs_cleanup_layoutcommit(data); 8283 nfs_post_op_update_inode_force_wcc(data->args.inode, 8284 data->res.fattr); 8285 put_rpccred(data->cred); 8286 nfs_iput_and_deactive(data->inode); 8287 kfree(data); 8288 } 8289 8290 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 8291 .rpc_call_prepare = nfs4_layoutcommit_prepare, 8292 .rpc_call_done = nfs4_layoutcommit_done, 8293 .rpc_release = nfs4_layoutcommit_release, 8294 }; 8295 8296 int 8297 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 8298 { 8299 struct rpc_message msg = { 8300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 8301 .rpc_argp = &data->args, 8302 .rpc_resp = &data->res, 8303 .rpc_cred = data->cred, 8304 }; 8305 struct rpc_task_setup task_setup_data = { 8306 .task = &data->task, 8307 .rpc_client = NFS_CLIENT(data->args.inode), 8308 .rpc_message = &msg, 8309 .callback_ops = &nfs4_layoutcommit_ops, 8310 .callback_data = data, 8311 }; 8312 struct rpc_task *task; 8313 int status = 0; 8314 8315 dprintk("NFS: initiating layoutcommit call. sync %d " 8316 "lbw: %llu inode %lu\n", sync, 8317 data->args.lastbytewritten, 8318 data->args.inode->i_ino); 8319 8320 if (!sync) { 8321 data->inode = nfs_igrab_and_active(data->args.inode); 8322 if (data->inode == NULL) { 8323 nfs4_layoutcommit_release(data); 8324 return -EAGAIN; 8325 } 8326 task_setup_data.flags = RPC_TASK_ASYNC; 8327 } 8328 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 8329 task = rpc_run_task(&task_setup_data); 8330 if (IS_ERR(task)) 8331 return PTR_ERR(task); 8332 if (sync) 8333 status = task->tk_status; 8334 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 8335 dprintk("%s: status %d\n", __func__, status); 8336 rpc_put_task(task); 8337 return status; 8338 } 8339 8340 /** 8341 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 8342 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 8343 */ 8344 static int 8345 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 8346 struct nfs_fsinfo *info, 8347 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8348 { 8349 struct nfs41_secinfo_no_name_args args = { 8350 .style = SECINFO_STYLE_CURRENT_FH, 8351 }; 8352 struct nfs4_secinfo_res res = { 8353 .flavors = flavors, 8354 }; 8355 struct rpc_message msg = { 8356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 8357 .rpc_argp = &args, 8358 .rpc_resp = &res, 8359 }; 8360 struct rpc_clnt *clnt = server->client; 8361 struct rpc_cred *cred = NULL; 8362 int status; 8363 8364 if (use_integrity) { 8365 clnt = server->nfs_client->cl_rpcclient; 8366 cred = nfs4_get_clid_cred(server->nfs_client); 8367 msg.rpc_cred = cred; 8368 } 8369 8370 dprintk("--> %s\n", __func__); 8371 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 8372 &res.seq_res, 0); 8373 dprintk("<-- %s status=%d\n", __func__, status); 8374 8375 if (cred) 8376 put_rpccred(cred); 8377 8378 return status; 8379 } 8380 8381 static int 8382 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 8383 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 8384 { 8385 struct nfs4_exception exception = { }; 8386 int err; 8387 do { 8388 /* first try using integrity protection */ 8389 err = -NFS4ERR_WRONGSEC; 8390 8391 /* try to use integrity protection with machine cred */ 8392 if (_nfs4_is_integrity_protected(server->nfs_client)) 8393 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 8394 flavors, true); 8395 8396 /* 8397 * if unable to use integrity protection, or SECINFO with 8398 * integrity protection returns NFS4ERR_WRONGSEC (which is 8399 * disallowed by spec, but exists in deployed servers) use 8400 * the current filesystem's rpc_client and the user cred. 8401 */ 8402 if (err == -NFS4ERR_WRONGSEC) 8403 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 8404 flavors, false); 8405 8406 switch (err) { 8407 case 0: 8408 case -NFS4ERR_WRONGSEC: 8409 case -ENOTSUPP: 8410 goto out; 8411 default: 8412 err = nfs4_handle_exception(server, err, &exception); 8413 } 8414 } while (exception.retry); 8415 out: 8416 return err; 8417 } 8418 8419 static int 8420 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 8421 struct nfs_fsinfo *info) 8422 { 8423 int err; 8424 struct page *page; 8425 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 8426 struct nfs4_secinfo_flavors *flavors; 8427 struct nfs4_secinfo4 *secinfo; 8428 int i; 8429 8430 page = alloc_page(GFP_KERNEL); 8431 if (!page) { 8432 err = -ENOMEM; 8433 goto out; 8434 } 8435 8436 flavors = page_address(page); 8437 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 8438 8439 /* 8440 * Fall back on "guess and check" method if 8441 * the server doesn't support SECINFO_NO_NAME 8442 */ 8443 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 8444 err = nfs4_find_root_sec(server, fhandle, info); 8445 goto out_freepage; 8446 } 8447 if (err) 8448 goto out_freepage; 8449 8450 for (i = 0; i < flavors->num_flavors; i++) { 8451 secinfo = &flavors->flavors[i]; 8452 8453 switch (secinfo->flavor) { 8454 case RPC_AUTH_NULL: 8455 case RPC_AUTH_UNIX: 8456 case RPC_AUTH_GSS: 8457 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 8458 &secinfo->flavor_info); 8459 break; 8460 default: 8461 flavor = RPC_AUTH_MAXFLAVOR; 8462 break; 8463 } 8464 8465 if (!nfs_auth_info_match(&server->auth_info, flavor)) 8466 flavor = RPC_AUTH_MAXFLAVOR; 8467 8468 if (flavor != RPC_AUTH_MAXFLAVOR) { 8469 err = nfs4_lookup_root_sec(server, fhandle, 8470 info, flavor); 8471 if (!err) 8472 break; 8473 } 8474 } 8475 8476 if (flavor == RPC_AUTH_MAXFLAVOR) 8477 err = -EPERM; 8478 8479 out_freepage: 8480 put_page(page); 8481 if (err == -EACCES) 8482 return -EPERM; 8483 out: 8484 return err; 8485 } 8486 8487 static int _nfs41_test_stateid(struct nfs_server *server, 8488 nfs4_stateid *stateid, 8489 struct rpc_cred *cred) 8490 { 8491 int status; 8492 struct nfs41_test_stateid_args args = { 8493 .stateid = stateid, 8494 }; 8495 struct nfs41_test_stateid_res res; 8496 struct rpc_message msg = { 8497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 8498 .rpc_argp = &args, 8499 .rpc_resp = &res, 8500 .rpc_cred = cred, 8501 }; 8502 struct rpc_clnt *rpc_client = server->client; 8503 8504 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 8505 &rpc_client, &msg); 8506 8507 dprintk("NFS call test_stateid %p\n", stateid); 8508 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 8509 nfs4_set_sequence_privileged(&args.seq_args); 8510 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 8511 &args.seq_args, &res.seq_res); 8512 if (status != NFS_OK) { 8513 dprintk("NFS reply test_stateid: failed, %d\n", status); 8514 return status; 8515 } 8516 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 8517 return -res.status; 8518 } 8519 8520 /** 8521 * nfs41_test_stateid - perform a TEST_STATEID operation 8522 * 8523 * @server: server / transport on which to perform the operation 8524 * @stateid: state ID to test 8525 * @cred: credential 8526 * 8527 * Returns NFS_OK if the server recognizes that "stateid" is valid. 8528 * Otherwise a negative NFS4ERR value is returned if the operation 8529 * failed or the state ID is not currently valid. 8530 */ 8531 static int nfs41_test_stateid(struct nfs_server *server, 8532 nfs4_stateid *stateid, 8533 struct rpc_cred *cred) 8534 { 8535 struct nfs4_exception exception = { }; 8536 int err; 8537 do { 8538 err = _nfs41_test_stateid(server, stateid, cred); 8539 if (err != -NFS4ERR_DELAY) 8540 break; 8541 nfs4_handle_exception(server, err, &exception); 8542 } while (exception.retry); 8543 return err; 8544 } 8545 8546 struct nfs_free_stateid_data { 8547 struct nfs_server *server; 8548 struct nfs41_free_stateid_args args; 8549 struct nfs41_free_stateid_res res; 8550 }; 8551 8552 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 8553 { 8554 struct nfs_free_stateid_data *data = calldata; 8555 nfs41_setup_sequence(nfs4_get_session(data->server), 8556 &data->args.seq_args, 8557 &data->res.seq_res, 8558 task); 8559 } 8560 8561 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 8562 { 8563 struct nfs_free_stateid_data *data = calldata; 8564 8565 nfs41_sequence_done(task, &data->res.seq_res); 8566 8567 switch (task->tk_status) { 8568 case -NFS4ERR_DELAY: 8569 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 8570 rpc_restart_call_prepare(task); 8571 } 8572 } 8573 8574 static void nfs41_free_stateid_release(void *calldata) 8575 { 8576 kfree(calldata); 8577 } 8578 8579 static const struct rpc_call_ops nfs41_free_stateid_ops = { 8580 .rpc_call_prepare = nfs41_free_stateid_prepare, 8581 .rpc_call_done = nfs41_free_stateid_done, 8582 .rpc_release = nfs41_free_stateid_release, 8583 }; 8584 8585 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server, 8586 nfs4_stateid *stateid, 8587 struct rpc_cred *cred, 8588 bool privileged) 8589 { 8590 struct rpc_message msg = { 8591 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 8592 .rpc_cred = cred, 8593 }; 8594 struct rpc_task_setup task_setup = { 8595 .rpc_client = server->client, 8596 .rpc_message = &msg, 8597 .callback_ops = &nfs41_free_stateid_ops, 8598 .flags = RPC_TASK_ASYNC, 8599 }; 8600 struct nfs_free_stateid_data *data; 8601 8602 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 8603 &task_setup.rpc_client, &msg); 8604 8605 dprintk("NFS call free_stateid %p\n", stateid); 8606 data = kmalloc(sizeof(*data), GFP_NOFS); 8607 if (!data) 8608 return ERR_PTR(-ENOMEM); 8609 data->server = server; 8610 nfs4_stateid_copy(&data->args.stateid, stateid); 8611 8612 task_setup.callback_data = data; 8613 8614 msg.rpc_argp = &data->args; 8615 msg.rpc_resp = &data->res; 8616 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 8617 if (privileged) 8618 nfs4_set_sequence_privileged(&data->args.seq_args); 8619 8620 return rpc_run_task(&task_setup); 8621 } 8622 8623 /** 8624 * nfs41_free_stateid - perform a FREE_STATEID operation 8625 * 8626 * @server: server / transport on which to perform the operation 8627 * @stateid: state ID to release 8628 * @cred: credential 8629 * 8630 * Returns NFS_OK if the server freed "stateid". Otherwise a 8631 * negative NFS4ERR value is returned. 8632 */ 8633 static int nfs41_free_stateid(struct nfs_server *server, 8634 nfs4_stateid *stateid, 8635 struct rpc_cred *cred) 8636 { 8637 struct rpc_task *task; 8638 int ret; 8639 8640 task = _nfs41_free_stateid(server, stateid, cred, true); 8641 if (IS_ERR(task)) 8642 return PTR_ERR(task); 8643 ret = rpc_wait_for_completion_task(task); 8644 if (!ret) 8645 ret = task->tk_status; 8646 rpc_put_task(task); 8647 return ret; 8648 } 8649 8650 static void 8651 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 8652 { 8653 struct rpc_task *task; 8654 struct rpc_cred *cred = lsp->ls_state->owner->so_cred; 8655 8656 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 8657 nfs4_free_lock_state(server, lsp); 8658 if (IS_ERR(task)) 8659 return; 8660 rpc_put_task(task); 8661 } 8662 8663 static bool nfs41_match_stateid(const nfs4_stateid *s1, 8664 const nfs4_stateid *s2) 8665 { 8666 if (s1->type != s2->type) 8667 return false; 8668 8669 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 8670 return false; 8671 8672 if (s1->seqid == s2->seqid) 8673 return true; 8674 if (s1->seqid == 0 || s2->seqid == 0) 8675 return true; 8676 8677 return false; 8678 } 8679 8680 #endif /* CONFIG_NFS_V4_1 */ 8681 8682 static bool nfs4_match_stateid(const nfs4_stateid *s1, 8683 const nfs4_stateid *s2) 8684 { 8685 return nfs4_stateid_match(s1, s2); 8686 } 8687 8688 8689 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 8690 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 8691 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 8692 .recover_open = nfs4_open_reclaim, 8693 .recover_lock = nfs4_lock_reclaim, 8694 .establish_clid = nfs4_init_clientid, 8695 .detect_trunking = nfs40_discover_server_trunking, 8696 }; 8697 8698 #if defined(CONFIG_NFS_V4_1) 8699 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 8700 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 8701 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 8702 .recover_open = nfs4_open_reclaim, 8703 .recover_lock = nfs4_lock_reclaim, 8704 .establish_clid = nfs41_init_clientid, 8705 .reclaim_complete = nfs41_proc_reclaim_complete, 8706 .detect_trunking = nfs41_discover_server_trunking, 8707 }; 8708 #endif /* CONFIG_NFS_V4_1 */ 8709 8710 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 8711 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 8712 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 8713 .recover_open = nfs40_open_expired, 8714 .recover_lock = nfs4_lock_expired, 8715 .establish_clid = nfs4_init_clientid, 8716 }; 8717 8718 #if defined(CONFIG_NFS_V4_1) 8719 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 8720 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 8721 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 8722 .recover_open = nfs41_open_expired, 8723 .recover_lock = nfs41_lock_expired, 8724 .establish_clid = nfs41_init_clientid, 8725 }; 8726 #endif /* CONFIG_NFS_V4_1 */ 8727 8728 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 8729 .sched_state_renewal = nfs4_proc_async_renew, 8730 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, 8731 .renew_lease = nfs4_proc_renew, 8732 }; 8733 8734 #if defined(CONFIG_NFS_V4_1) 8735 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 8736 .sched_state_renewal = nfs41_proc_async_sequence, 8737 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, 8738 .renew_lease = nfs4_proc_sequence, 8739 }; 8740 #endif 8741 8742 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 8743 .get_locations = _nfs40_proc_get_locations, 8744 .fsid_present = _nfs40_proc_fsid_present, 8745 }; 8746 8747 #if defined(CONFIG_NFS_V4_1) 8748 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 8749 .get_locations = _nfs41_proc_get_locations, 8750 .fsid_present = _nfs41_proc_fsid_present, 8751 }; 8752 #endif /* CONFIG_NFS_V4_1 */ 8753 8754 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 8755 .minor_version = 0, 8756 .init_caps = NFS_CAP_READDIRPLUS 8757 | NFS_CAP_ATOMIC_OPEN 8758 | NFS_CAP_POSIX_LOCK, 8759 .init_client = nfs40_init_client, 8760 .shutdown_client = nfs40_shutdown_client, 8761 .match_stateid = nfs4_match_stateid, 8762 .find_root_sec = nfs4_find_root_sec, 8763 .free_lock_state = nfs4_release_lockowner, 8764 .alloc_seqid = nfs_alloc_seqid, 8765 .call_sync_ops = &nfs40_call_sync_ops, 8766 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 8767 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 8768 .state_renewal_ops = &nfs40_state_renewal_ops, 8769 .mig_recovery_ops = &nfs40_mig_recovery_ops, 8770 }; 8771 8772 #if defined(CONFIG_NFS_V4_1) 8773 static struct nfs_seqid * 8774 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 8775 { 8776 return NULL; 8777 } 8778 8779 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 8780 .minor_version = 1, 8781 .init_caps = NFS_CAP_READDIRPLUS 8782 | NFS_CAP_ATOMIC_OPEN 8783 | NFS_CAP_POSIX_LOCK 8784 | NFS_CAP_STATEID_NFSV41 8785 | NFS_CAP_ATOMIC_OPEN_V1, 8786 .init_client = nfs41_init_client, 8787 .shutdown_client = nfs41_shutdown_client, 8788 .match_stateid = nfs41_match_stateid, 8789 .find_root_sec = nfs41_find_root_sec, 8790 .free_lock_state = nfs41_free_lock_state, 8791 .alloc_seqid = nfs_alloc_no_seqid, 8792 .call_sync_ops = &nfs41_call_sync_ops, 8793 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 8794 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 8795 .state_renewal_ops = &nfs41_state_renewal_ops, 8796 .mig_recovery_ops = &nfs41_mig_recovery_ops, 8797 }; 8798 #endif 8799 8800 #if defined(CONFIG_NFS_V4_2) 8801 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 8802 .minor_version = 2, 8803 .init_caps = NFS_CAP_READDIRPLUS 8804 | NFS_CAP_ATOMIC_OPEN 8805 | NFS_CAP_POSIX_LOCK 8806 | NFS_CAP_STATEID_NFSV41 8807 | NFS_CAP_ATOMIC_OPEN_V1 8808 | NFS_CAP_ALLOCATE 8809 | NFS_CAP_COPY 8810 | NFS_CAP_DEALLOCATE 8811 | NFS_CAP_SEEK 8812 | NFS_CAP_LAYOUTSTATS 8813 | NFS_CAP_CLONE, 8814 .init_client = nfs41_init_client, 8815 .shutdown_client = nfs41_shutdown_client, 8816 .match_stateid = nfs41_match_stateid, 8817 .find_root_sec = nfs41_find_root_sec, 8818 .free_lock_state = nfs41_free_lock_state, 8819 .call_sync_ops = &nfs41_call_sync_ops, 8820 .alloc_seqid = nfs_alloc_no_seqid, 8821 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 8822 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 8823 .state_renewal_ops = &nfs41_state_renewal_ops, 8824 .mig_recovery_ops = &nfs41_mig_recovery_ops, 8825 }; 8826 #endif 8827 8828 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 8829 [0] = &nfs_v4_0_minor_ops, 8830 #if defined(CONFIG_NFS_V4_1) 8831 [1] = &nfs_v4_1_minor_ops, 8832 #endif 8833 #if defined(CONFIG_NFS_V4_2) 8834 [2] = &nfs_v4_2_minor_ops, 8835 #endif 8836 }; 8837 8838 ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 8839 { 8840 ssize_t error, error2; 8841 8842 error = generic_listxattr(dentry, list, size); 8843 if (error < 0) 8844 return error; 8845 if (list) { 8846 list += error; 8847 size -= error; 8848 } 8849 8850 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); 8851 if (error2 < 0) 8852 return error2; 8853 return error + error2; 8854 } 8855 8856 static const struct inode_operations nfs4_dir_inode_operations = { 8857 .create = nfs_create, 8858 .lookup = nfs_lookup, 8859 .atomic_open = nfs_atomic_open, 8860 .link = nfs_link, 8861 .unlink = nfs_unlink, 8862 .symlink = nfs_symlink, 8863 .mkdir = nfs_mkdir, 8864 .rmdir = nfs_rmdir, 8865 .mknod = nfs_mknod, 8866 .rename = nfs_rename, 8867 .permission = nfs_permission, 8868 .getattr = nfs_getattr, 8869 .setattr = nfs_setattr, 8870 .getxattr = generic_getxattr, 8871 .setxattr = generic_setxattr, 8872 .listxattr = nfs4_listxattr, 8873 .removexattr = generic_removexattr, 8874 }; 8875 8876 static const struct inode_operations nfs4_file_inode_operations = { 8877 .permission = nfs_permission, 8878 .getattr = nfs_getattr, 8879 .setattr = nfs_setattr, 8880 .getxattr = generic_getxattr, 8881 .setxattr = generic_setxattr, 8882 .listxattr = nfs4_listxattr, 8883 .removexattr = generic_removexattr, 8884 }; 8885 8886 const struct nfs_rpc_ops nfs_v4_clientops = { 8887 .version = 4, /* protocol version */ 8888 .dentry_ops = &nfs4_dentry_operations, 8889 .dir_inode_ops = &nfs4_dir_inode_operations, 8890 .file_inode_ops = &nfs4_file_inode_operations, 8891 .file_ops = &nfs4_file_operations, 8892 .getroot = nfs4_proc_get_root, 8893 .submount = nfs4_submount, 8894 .try_mount = nfs4_try_mount, 8895 .getattr = nfs4_proc_getattr, 8896 .setattr = nfs4_proc_setattr, 8897 .lookup = nfs4_proc_lookup, 8898 .access = nfs4_proc_access, 8899 .readlink = nfs4_proc_readlink, 8900 .create = nfs4_proc_create, 8901 .remove = nfs4_proc_remove, 8902 .unlink_setup = nfs4_proc_unlink_setup, 8903 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 8904 .unlink_done = nfs4_proc_unlink_done, 8905 .rename_setup = nfs4_proc_rename_setup, 8906 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 8907 .rename_done = nfs4_proc_rename_done, 8908 .link = nfs4_proc_link, 8909 .symlink = nfs4_proc_symlink, 8910 .mkdir = nfs4_proc_mkdir, 8911 .rmdir = nfs4_proc_remove, 8912 .readdir = nfs4_proc_readdir, 8913 .mknod = nfs4_proc_mknod, 8914 .statfs = nfs4_proc_statfs, 8915 .fsinfo = nfs4_proc_fsinfo, 8916 .pathconf = nfs4_proc_pathconf, 8917 .set_capabilities = nfs4_server_capabilities, 8918 .decode_dirent = nfs4_decode_dirent, 8919 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 8920 .read_setup = nfs4_proc_read_setup, 8921 .read_done = nfs4_read_done, 8922 .write_setup = nfs4_proc_write_setup, 8923 .write_done = nfs4_write_done, 8924 .commit_setup = nfs4_proc_commit_setup, 8925 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 8926 .commit_done = nfs4_commit_done, 8927 .lock = nfs4_proc_lock, 8928 .clear_acl_cache = nfs4_zap_acl_attr, 8929 .close_context = nfs4_close_context, 8930 .open_context = nfs4_atomic_open, 8931 .have_delegation = nfs4_have_delegation, 8932 .return_delegation = nfs4_inode_return_delegation, 8933 .alloc_client = nfs4_alloc_client, 8934 .init_client = nfs4_init_client, 8935 .free_client = nfs4_free_client, 8936 .create_server = nfs4_create_server, 8937 .clone_server = nfs_clone_server, 8938 }; 8939 8940 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 8941 .name = XATTR_NAME_NFSV4_ACL, 8942 .list = nfs4_xattr_list_nfs4_acl, 8943 .get = nfs4_xattr_get_nfs4_acl, 8944 .set = nfs4_xattr_set_nfs4_acl, 8945 }; 8946 8947 const struct xattr_handler *nfs4_xattr_handlers[] = { 8948 &nfs4_xattr_nfs4_acl_handler, 8949 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 8950 &nfs4_xattr_nfs4_label_handler, 8951 #endif 8952 NULL 8953 }; 8954 8955 /* 8956 * Local variables: 8957 * c-basic-offset: 8 8958 * End: 8959 */ 8960