1 /* 2 * fs/nfs/nfs4proc.c 3 * 4 * Client-side procedure declarations for NFSv4. 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <linux/mm.h> 39 #include <linux/delay.h> 40 #include <linux/errno.h> 41 #include <linux/string.h> 42 #include <linux/ratelimit.h> 43 #include <linux/printk.h> 44 #include <linux/slab.h> 45 #include <linux/sunrpc/clnt.h> 46 #include <linux/nfs.h> 47 #include <linux/nfs4.h> 48 #include <linux/nfs_fs.h> 49 #include <linux/nfs_page.h> 50 #include <linux/nfs_mount.h> 51 #include <linux/namei.h> 52 #include <linux/mount.h> 53 #include <linux/module.h> 54 #include <linux/nfs_idmap.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 "nfs4session.h" 67 #include "fscache.h" 68 69 #include "nfs4trace.h" 70 71 #define NFSDBG_FACILITY NFSDBG_PROC 72 73 #define NFS4_POLL_RETRY_MIN (HZ/10) 74 #define NFS4_POLL_RETRY_MAX (15*HZ) 75 76 struct nfs4_opendata; 77 static int _nfs4_proc_open(struct nfs4_opendata *data); 78 static int _nfs4_recover_proc_open(struct nfs4_opendata *data); 79 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 80 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); 81 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); 82 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label); 83 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label); 84 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 85 struct nfs_fattr *fattr, struct iattr *sattr, 86 struct nfs4_state *state, struct nfs4_label *ilabel, 87 struct nfs4_label *olabel); 88 #ifdef CONFIG_NFS_V4_1 89 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 90 struct rpc_cred *); 91 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *, 92 struct rpc_cred *); 93 #endif 94 95 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 96 static inline struct nfs4_label * 97 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 98 struct iattr *sattr, struct nfs4_label *label) 99 { 100 int err; 101 102 if (label == NULL) 103 return NULL; 104 105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 106 return NULL; 107 108 err = security_dentry_init_security(dentry, sattr->ia_mode, 109 &dentry->d_name, (void **)&label->label, &label->len); 110 if (err == 0) 111 return label; 112 113 return NULL; 114 } 115 static inline void 116 nfs4_label_release_security(struct nfs4_label *label) 117 { 118 if (label) 119 security_release_secctx(label->label, label->len); 120 } 121 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 122 { 123 if (label) 124 return server->attr_bitmask; 125 126 return server->attr_bitmask_nl; 127 } 128 #else 129 static inline struct nfs4_label * 130 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 131 struct iattr *sattr, struct nfs4_label *l) 132 { return NULL; } 133 static inline void 134 nfs4_label_release_security(struct nfs4_label *label) 135 { return; } 136 static inline u32 * 137 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 138 { return server->attr_bitmask; } 139 #endif 140 141 /* Prevent leaks of NFSv4 errors into userland */ 142 static int nfs4_map_errors(int err) 143 { 144 if (err >= -1000) 145 return err; 146 switch (err) { 147 case -NFS4ERR_RESOURCE: 148 case -NFS4ERR_LAYOUTTRYLATER: 149 case -NFS4ERR_RECALLCONFLICT: 150 return -EREMOTEIO; 151 case -NFS4ERR_WRONGSEC: 152 case -NFS4ERR_WRONG_CRED: 153 return -EPERM; 154 case -NFS4ERR_BADOWNER: 155 case -NFS4ERR_BADNAME: 156 return -EINVAL; 157 case -NFS4ERR_SHARE_DENIED: 158 return -EACCES; 159 case -NFS4ERR_MINOR_VERS_MISMATCH: 160 return -EPROTONOSUPPORT; 161 case -NFS4ERR_ACCESS: 162 return -EACCES; 163 case -NFS4ERR_FILE_OPEN: 164 return -EBUSY; 165 default: 166 dprintk("%s could not handle NFSv4 error %d\n", 167 __func__, -err); 168 break; 169 } 170 return -EIO; 171 } 172 173 /* 174 * This is our standard bitmap for GETATTR requests. 175 */ 176 const u32 nfs4_fattr_bitmap[3] = { 177 FATTR4_WORD0_TYPE 178 | FATTR4_WORD0_CHANGE 179 | FATTR4_WORD0_SIZE 180 | FATTR4_WORD0_FSID 181 | FATTR4_WORD0_FILEID, 182 FATTR4_WORD1_MODE 183 | FATTR4_WORD1_NUMLINKS 184 | FATTR4_WORD1_OWNER 185 | FATTR4_WORD1_OWNER_GROUP 186 | FATTR4_WORD1_RAWDEV 187 | FATTR4_WORD1_SPACE_USED 188 | FATTR4_WORD1_TIME_ACCESS 189 | FATTR4_WORD1_TIME_METADATA 190 | FATTR4_WORD1_TIME_MODIFY, 191 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 192 FATTR4_WORD2_SECURITY_LABEL 193 #endif 194 }; 195 196 static const u32 nfs4_pnfs_open_bitmap[3] = { 197 FATTR4_WORD0_TYPE 198 | FATTR4_WORD0_CHANGE 199 | FATTR4_WORD0_SIZE 200 | FATTR4_WORD0_FSID 201 | FATTR4_WORD0_FILEID, 202 FATTR4_WORD1_MODE 203 | FATTR4_WORD1_NUMLINKS 204 | FATTR4_WORD1_OWNER 205 | FATTR4_WORD1_OWNER_GROUP 206 | FATTR4_WORD1_RAWDEV 207 | FATTR4_WORD1_SPACE_USED 208 | FATTR4_WORD1_TIME_ACCESS 209 | FATTR4_WORD1_TIME_METADATA 210 | FATTR4_WORD1_TIME_MODIFY, 211 FATTR4_WORD2_MDSTHRESHOLD 212 }; 213 214 static const u32 nfs4_open_noattr_bitmap[3] = { 215 FATTR4_WORD0_TYPE 216 | FATTR4_WORD0_CHANGE 217 | FATTR4_WORD0_FILEID, 218 }; 219 220 const u32 nfs4_statfs_bitmap[3] = { 221 FATTR4_WORD0_FILES_AVAIL 222 | FATTR4_WORD0_FILES_FREE 223 | FATTR4_WORD0_FILES_TOTAL, 224 FATTR4_WORD1_SPACE_AVAIL 225 | FATTR4_WORD1_SPACE_FREE 226 | FATTR4_WORD1_SPACE_TOTAL 227 }; 228 229 const u32 nfs4_pathconf_bitmap[3] = { 230 FATTR4_WORD0_MAXLINK 231 | FATTR4_WORD0_MAXNAME, 232 0 233 }; 234 235 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 236 | FATTR4_WORD0_MAXREAD 237 | FATTR4_WORD0_MAXWRITE 238 | FATTR4_WORD0_LEASE_TIME, 239 FATTR4_WORD1_TIME_DELTA 240 | FATTR4_WORD1_FS_LAYOUT_TYPES, 241 FATTR4_WORD2_LAYOUT_BLKSIZE 242 }; 243 244 const u32 nfs4_fs_locations_bitmap[3] = { 245 FATTR4_WORD0_TYPE 246 | FATTR4_WORD0_CHANGE 247 | FATTR4_WORD0_SIZE 248 | FATTR4_WORD0_FSID 249 | FATTR4_WORD0_FILEID 250 | FATTR4_WORD0_FS_LOCATIONS, 251 FATTR4_WORD1_MODE 252 | FATTR4_WORD1_NUMLINKS 253 | FATTR4_WORD1_OWNER 254 | FATTR4_WORD1_OWNER_GROUP 255 | FATTR4_WORD1_RAWDEV 256 | FATTR4_WORD1_SPACE_USED 257 | FATTR4_WORD1_TIME_ACCESS 258 | FATTR4_WORD1_TIME_METADATA 259 | FATTR4_WORD1_TIME_MODIFY 260 | FATTR4_WORD1_MOUNTED_ON_FILEID, 261 }; 262 263 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 264 struct nfs4_readdir_arg *readdir) 265 { 266 __be32 *start, *p; 267 268 if (cookie > 2) { 269 readdir->cookie = cookie; 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 271 return; 272 } 273 274 readdir->cookie = 0; 275 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 276 if (cookie == 2) 277 return; 278 279 /* 280 * NFSv4 servers do not return entries for '.' and '..' 281 * Therefore, we fake these entries here. We let '.' 282 * have cookie 0 and '..' have cookie 1. Note that 283 * when talking to the server, we always send cookie 0 284 * instead of 1 or 2. 285 */ 286 start = p = kmap_atomic(*readdir->pages); 287 288 if (cookie == 0) { 289 *p++ = xdr_one; /* next */ 290 *p++ = xdr_zero; /* cookie, first word */ 291 *p++ = xdr_one; /* cookie, second word */ 292 *p++ = xdr_one; /* entry len */ 293 memcpy(p, ".\0\0\0", 4); /* entry */ 294 p++; 295 *p++ = xdr_one; /* bitmap length */ 296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ 297 *p++ = htonl(8); /* attribute buffer length */ 298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); 299 } 300 301 *p++ = xdr_one; /* next */ 302 *p++ = xdr_zero; /* cookie, first word */ 303 *p++ = xdr_two; /* cookie, second word */ 304 *p++ = xdr_two; /* entry len */ 305 memcpy(p, "..\0\0", 4); /* entry */ 306 p++; 307 *p++ = xdr_one; /* bitmap length */ 308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ 309 *p++ = htonl(8); /* attribute buffer length */ 310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); 311 312 readdir->pgbase = (char *)p - (char *)start; 313 readdir->count -= readdir->pgbase; 314 kunmap_atomic(start); 315 } 316 317 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) 318 { 319 int res = 0; 320 321 might_sleep(); 322 323 if (*timeout <= 0) 324 *timeout = NFS4_POLL_RETRY_MIN; 325 if (*timeout > NFS4_POLL_RETRY_MAX) 326 *timeout = NFS4_POLL_RETRY_MAX; 327 freezable_schedule_timeout_killable_unsafe(*timeout); 328 if (fatal_signal_pending(current)) 329 res = -ERESTARTSYS; 330 *timeout <<= 1; 331 return res; 332 } 333 334 /* This is the error handling routine for processes that are allowed 335 * to sleep. 336 */ 337 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 338 { 339 struct nfs_client *clp = server->nfs_client; 340 struct nfs4_state *state = exception->state; 341 struct inode *inode = exception->inode; 342 int ret = errorcode; 343 344 exception->retry = 0; 345 switch(errorcode) { 346 case 0: 347 return 0; 348 case -NFS4ERR_OPENMODE: 349 if (inode && nfs4_have_delegation(inode, FMODE_READ)) { 350 nfs4_inode_return_delegation(inode); 351 exception->retry = 1; 352 return 0; 353 } 354 if (state == NULL) 355 break; 356 ret = nfs4_schedule_stateid_recovery(server, state); 357 if (ret < 0) 358 break; 359 goto wait_on_recovery; 360 case -NFS4ERR_DELEG_REVOKED: 361 case -NFS4ERR_ADMIN_REVOKED: 362 case -NFS4ERR_BAD_STATEID: 363 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) { 364 nfs_remove_bad_delegation(inode); 365 exception->retry = 1; 366 break; 367 } 368 if (state == NULL) 369 break; 370 ret = nfs4_schedule_stateid_recovery(server, state); 371 if (ret < 0) 372 break; 373 goto wait_on_recovery; 374 case -NFS4ERR_EXPIRED: 375 if (state != NULL) { 376 ret = nfs4_schedule_stateid_recovery(server, state); 377 if (ret < 0) 378 break; 379 } 380 case -NFS4ERR_STALE_STATEID: 381 case -NFS4ERR_STALE_CLIENTID: 382 nfs4_schedule_lease_recovery(clp); 383 goto wait_on_recovery; 384 case -NFS4ERR_MOVED: 385 ret = nfs4_schedule_migration_recovery(server); 386 if (ret < 0) 387 break; 388 goto wait_on_recovery; 389 case -NFS4ERR_LEASE_MOVED: 390 nfs4_schedule_lease_moved_recovery(clp); 391 goto wait_on_recovery; 392 #if defined(CONFIG_NFS_V4_1) 393 case -NFS4ERR_BADSESSION: 394 case -NFS4ERR_BADSLOT: 395 case -NFS4ERR_BAD_HIGH_SLOT: 396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 397 case -NFS4ERR_DEADSESSION: 398 case -NFS4ERR_SEQ_FALSE_RETRY: 399 case -NFS4ERR_SEQ_MISORDERED: 400 dprintk("%s ERROR: %d Reset session\n", __func__, 401 errorcode); 402 nfs4_schedule_session_recovery(clp->cl_session, errorcode); 403 goto wait_on_recovery; 404 #endif /* defined(CONFIG_NFS_V4_1) */ 405 case -NFS4ERR_FILE_OPEN: 406 if (exception->timeout > HZ) { 407 /* We have retried a decent amount, time to 408 * fail 409 */ 410 ret = -EBUSY; 411 break; 412 } 413 case -NFS4ERR_GRACE: 414 case -NFS4ERR_DELAY: 415 ret = nfs4_delay(server->client, &exception->timeout); 416 if (ret != 0) 417 break; 418 case -NFS4ERR_RETRY_UNCACHED_REP: 419 case -NFS4ERR_OLD_STATEID: 420 exception->retry = 1; 421 break; 422 case -NFS4ERR_BADOWNER: 423 /* The following works around a Linux server bug! */ 424 case -NFS4ERR_BADNAME: 425 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 426 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 427 exception->retry = 1; 428 printk(KERN_WARNING "NFS: v4 server %s " 429 "does not accept raw " 430 "uid/gids. " 431 "Reenabling the idmapper.\n", 432 server->nfs_client->cl_hostname); 433 } 434 } 435 /* We failed to handle the error */ 436 return nfs4_map_errors(ret); 437 wait_on_recovery: 438 ret = nfs4_wait_clnt_recover(clp); 439 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 440 return -EIO; 441 if (ret == 0) 442 exception->retry = 1; 443 return ret; 444 } 445 446 /* 447 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 448 * or 'false' otherwise. 449 */ 450 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 451 { 452 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 453 454 if (flavor == RPC_AUTH_GSS_KRB5I || 455 flavor == RPC_AUTH_GSS_KRB5P) 456 return true; 457 458 return false; 459 } 460 461 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 462 { 463 spin_lock(&clp->cl_lock); 464 if (time_before(clp->cl_last_renewal,timestamp)) 465 clp->cl_last_renewal = timestamp; 466 spin_unlock(&clp->cl_lock); 467 } 468 469 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 470 { 471 do_renew_lease(server->nfs_client, timestamp); 472 } 473 474 struct nfs4_call_sync_data { 475 const struct nfs_server *seq_server; 476 struct nfs4_sequence_args *seq_args; 477 struct nfs4_sequence_res *seq_res; 478 }; 479 480 static void nfs4_init_sequence(struct nfs4_sequence_args *args, 481 struct nfs4_sequence_res *res, int cache_reply) 482 { 483 args->sa_slot = NULL; 484 args->sa_cache_this = cache_reply; 485 args->sa_privileged = 0; 486 487 res->sr_slot = NULL; 488 } 489 490 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args) 491 { 492 args->sa_privileged = 1; 493 } 494 495 static int nfs40_setup_sequence(const struct nfs_server *server, 496 struct nfs4_sequence_args *args, 497 struct nfs4_sequence_res *res, 498 struct rpc_task *task) 499 { 500 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl; 501 struct nfs4_slot *slot; 502 503 /* slot already allocated? */ 504 if (res->sr_slot != NULL) 505 goto out_start; 506 507 spin_lock(&tbl->slot_tbl_lock); 508 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 509 goto out_sleep; 510 511 slot = nfs4_alloc_slot(tbl); 512 if (IS_ERR(slot)) { 513 if (slot == ERR_PTR(-ENOMEM)) 514 task->tk_timeout = HZ >> 2; 515 goto out_sleep; 516 } 517 spin_unlock(&tbl->slot_tbl_lock); 518 519 args->sa_slot = slot; 520 res->sr_slot = slot; 521 522 out_start: 523 rpc_call_start(task); 524 return 0; 525 526 out_sleep: 527 if (args->sa_privileged) 528 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 529 NULL, RPC_PRIORITY_PRIVILEGED); 530 else 531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 532 spin_unlock(&tbl->slot_tbl_lock); 533 return -EAGAIN; 534 } 535 536 static int nfs40_sequence_done(struct rpc_task *task, 537 struct nfs4_sequence_res *res) 538 { 539 struct nfs4_slot *slot = res->sr_slot; 540 struct nfs4_slot_table *tbl; 541 542 if (!RPC_WAS_SENT(task)) 543 goto out; 544 545 tbl = slot->table; 546 spin_lock(&tbl->slot_tbl_lock); 547 if (!nfs41_wake_and_assign_slot(tbl, slot)) 548 nfs4_free_slot(tbl, slot); 549 spin_unlock(&tbl->slot_tbl_lock); 550 551 res->sr_slot = NULL; 552 out: 553 return 1; 554 } 555 556 #if defined(CONFIG_NFS_V4_1) 557 558 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 559 { 560 struct nfs4_session *session; 561 struct nfs4_slot_table *tbl; 562 bool send_new_highest_used_slotid = false; 563 564 if (!res->sr_slot) { 565 /* just wake up the next guy waiting since 566 * we may have not consumed a slot after all */ 567 dprintk("%s: No slot\n", __func__); 568 return; 569 } 570 tbl = res->sr_slot->table; 571 session = tbl->session; 572 573 spin_lock(&tbl->slot_tbl_lock); 574 /* Be nice to the server: try to ensure that the last transmitted 575 * value for highest_user_slotid <= target_highest_slotid 576 */ 577 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 578 send_new_highest_used_slotid = true; 579 580 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) { 581 send_new_highest_used_slotid = false; 582 goto out_unlock; 583 } 584 nfs4_free_slot(tbl, res->sr_slot); 585 586 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 587 send_new_highest_used_slotid = false; 588 out_unlock: 589 spin_unlock(&tbl->slot_tbl_lock); 590 res->sr_slot = NULL; 591 if (send_new_highest_used_slotid) 592 nfs41_server_notify_highest_slotid_update(session->clp); 593 } 594 595 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 596 { 597 struct nfs4_session *session; 598 struct nfs4_slot *slot; 599 struct nfs_client *clp; 600 bool interrupted = false; 601 int ret = 1; 602 603 /* don't increment the sequence number if the task wasn't sent */ 604 if (!RPC_WAS_SENT(task)) 605 goto out; 606 607 slot = res->sr_slot; 608 session = slot->table->session; 609 610 if (slot->interrupted) { 611 slot->interrupted = 0; 612 interrupted = true; 613 } 614 615 trace_nfs4_sequence_done(session, res); 616 /* Check the SEQUENCE operation status */ 617 switch (res->sr_status) { 618 case 0: 619 /* Update the slot's sequence and clientid lease timer */ 620 ++slot->seq_nr; 621 clp = session->clp; 622 do_renew_lease(clp, res->sr_timestamp); 623 /* Check sequence flags */ 624 if (res->sr_status_flags != 0) 625 nfs4_schedule_lease_recovery(clp); 626 nfs41_update_target_slotid(slot->table, slot, res); 627 break; 628 case 1: 629 /* 630 * sr_status remains 1 if an RPC level error occurred. 631 * The server may or may not have processed the sequence 632 * operation.. 633 * Mark the slot as having hosted an interrupted RPC call. 634 */ 635 slot->interrupted = 1; 636 goto out; 637 case -NFS4ERR_DELAY: 638 /* The server detected a resend of the RPC call and 639 * returned NFS4ERR_DELAY as per Section 2.10.6.2 640 * of RFC5661. 641 */ 642 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 643 __func__, 644 slot->slot_nr, 645 slot->seq_nr); 646 goto out_retry; 647 case -NFS4ERR_BADSLOT: 648 /* 649 * The slot id we used was probably retired. Try again 650 * using a different slot id. 651 */ 652 goto retry_nowait; 653 case -NFS4ERR_SEQ_MISORDERED: 654 /* 655 * Was the last operation on this sequence interrupted? 656 * If so, retry after bumping the sequence number. 657 */ 658 if (interrupted) { 659 ++slot->seq_nr; 660 goto retry_nowait; 661 } 662 /* 663 * Could this slot have been previously retired? 664 * If so, then the server may be expecting seq_nr = 1! 665 */ 666 if (slot->seq_nr != 1) { 667 slot->seq_nr = 1; 668 goto retry_nowait; 669 } 670 break; 671 case -NFS4ERR_SEQ_FALSE_RETRY: 672 ++slot->seq_nr; 673 goto retry_nowait; 674 default: 675 /* Just update the slot sequence no. */ 676 ++slot->seq_nr; 677 } 678 out: 679 /* The session may be reset by one of the error handlers. */ 680 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 681 nfs41_sequence_free_slot(res); 682 return ret; 683 retry_nowait: 684 if (rpc_restart_call_prepare(task)) { 685 task->tk_status = 0; 686 ret = 0; 687 } 688 goto out; 689 out_retry: 690 if (!rpc_restart_call(task)) 691 goto out; 692 rpc_delay(task, NFS4_POLL_RETRY_MAX); 693 return 0; 694 } 695 696 static int nfs4_sequence_done(struct rpc_task *task, 697 struct nfs4_sequence_res *res) 698 { 699 if (res->sr_slot == NULL) 700 return 1; 701 if (!res->sr_slot->table->session) 702 return nfs40_sequence_done(task, res); 703 return nfs41_sequence_done(task, res); 704 } 705 706 int nfs41_setup_sequence(struct nfs4_session *session, 707 struct nfs4_sequence_args *args, 708 struct nfs4_sequence_res *res, 709 struct rpc_task *task) 710 { 711 struct nfs4_slot *slot; 712 struct nfs4_slot_table *tbl; 713 714 dprintk("--> %s\n", __func__); 715 /* slot already allocated? */ 716 if (res->sr_slot != NULL) 717 goto out_success; 718 719 tbl = &session->fc_slot_table; 720 721 task->tk_timeout = 0; 722 723 spin_lock(&tbl->slot_tbl_lock); 724 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) && 725 !args->sa_privileged) { 726 /* The state manager will wait until the slot table is empty */ 727 dprintk("%s session is draining\n", __func__); 728 goto out_sleep; 729 } 730 731 slot = nfs4_alloc_slot(tbl); 732 if (IS_ERR(slot)) { 733 /* If out of memory, try again in 1/4 second */ 734 if (slot == ERR_PTR(-ENOMEM)) 735 task->tk_timeout = HZ >> 2; 736 dprintk("<-- %s: no free slots\n", __func__); 737 goto out_sleep; 738 } 739 spin_unlock(&tbl->slot_tbl_lock); 740 741 args->sa_slot = slot; 742 743 dprintk("<-- %s slotid=%u seqid=%u\n", __func__, 744 slot->slot_nr, slot->seq_nr); 745 746 res->sr_slot = slot; 747 res->sr_timestamp = jiffies; 748 res->sr_status_flags = 0; 749 /* 750 * sr_status is only set in decode_sequence, and so will remain 751 * set to 1 if an rpc level failure occurs. 752 */ 753 res->sr_status = 1; 754 trace_nfs4_setup_sequence(session, args); 755 out_success: 756 rpc_call_start(task); 757 return 0; 758 out_sleep: 759 /* Privileged tasks are queued with top priority */ 760 if (args->sa_privileged) 761 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 762 NULL, RPC_PRIORITY_PRIVILEGED); 763 else 764 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 765 spin_unlock(&tbl->slot_tbl_lock); 766 return -EAGAIN; 767 } 768 EXPORT_SYMBOL_GPL(nfs41_setup_sequence); 769 770 static int nfs4_setup_sequence(const struct nfs_server *server, 771 struct nfs4_sequence_args *args, 772 struct nfs4_sequence_res *res, 773 struct rpc_task *task) 774 { 775 struct nfs4_session *session = nfs4_get_session(server); 776 int ret = 0; 777 778 if (!session) 779 return nfs40_setup_sequence(server, args, res, task); 780 781 dprintk("--> %s clp %p session %p sr_slot %u\n", 782 __func__, session->clp, session, res->sr_slot ? 783 res->sr_slot->slot_nr : NFS4_NO_SLOT); 784 785 ret = nfs41_setup_sequence(session, args, res, task); 786 787 dprintk("<-- %s status=%d\n", __func__, ret); 788 return ret; 789 } 790 791 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 792 { 793 struct nfs4_call_sync_data *data = calldata; 794 struct nfs4_session *session = nfs4_get_session(data->seq_server); 795 796 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 797 798 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task); 799 } 800 801 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 802 { 803 struct nfs4_call_sync_data *data = calldata; 804 805 nfs41_sequence_done(task, data->seq_res); 806 } 807 808 static const struct rpc_call_ops nfs41_call_sync_ops = { 809 .rpc_call_prepare = nfs41_call_sync_prepare, 810 .rpc_call_done = nfs41_call_sync_done, 811 }; 812 813 #else /* !CONFIG_NFS_V4_1 */ 814 815 static int nfs4_setup_sequence(const struct nfs_server *server, 816 struct nfs4_sequence_args *args, 817 struct nfs4_sequence_res *res, 818 struct rpc_task *task) 819 { 820 return nfs40_setup_sequence(server, args, res, task); 821 } 822 823 static int nfs4_sequence_done(struct rpc_task *task, 824 struct nfs4_sequence_res *res) 825 { 826 return nfs40_sequence_done(task, res); 827 } 828 829 #endif /* !CONFIG_NFS_V4_1 */ 830 831 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 832 { 833 struct nfs4_call_sync_data *data = calldata; 834 nfs4_setup_sequence(data->seq_server, 835 data->seq_args, data->seq_res, task); 836 } 837 838 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 839 { 840 struct nfs4_call_sync_data *data = calldata; 841 nfs4_sequence_done(task, data->seq_res); 842 } 843 844 static const struct rpc_call_ops nfs40_call_sync_ops = { 845 .rpc_call_prepare = nfs40_call_sync_prepare, 846 .rpc_call_done = nfs40_call_sync_done, 847 }; 848 849 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 850 struct nfs_server *server, 851 struct rpc_message *msg, 852 struct nfs4_sequence_args *args, 853 struct nfs4_sequence_res *res) 854 { 855 int ret; 856 struct rpc_task *task; 857 struct nfs_client *clp = server->nfs_client; 858 struct nfs4_call_sync_data data = { 859 .seq_server = server, 860 .seq_args = args, 861 .seq_res = res, 862 }; 863 struct rpc_task_setup task_setup = { 864 .rpc_client = clnt, 865 .rpc_message = msg, 866 .callback_ops = clp->cl_mvops->call_sync_ops, 867 .callback_data = &data 868 }; 869 870 task = rpc_run_task(&task_setup); 871 if (IS_ERR(task)) 872 ret = PTR_ERR(task); 873 else { 874 ret = task->tk_status; 875 rpc_put_task(task); 876 } 877 return ret; 878 } 879 880 static 881 int nfs4_call_sync(struct rpc_clnt *clnt, 882 struct nfs_server *server, 883 struct rpc_message *msg, 884 struct nfs4_sequence_args *args, 885 struct nfs4_sequence_res *res, 886 int cache_reply) 887 { 888 nfs4_init_sequence(args, res, cache_reply); 889 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 890 } 891 892 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) 893 { 894 struct nfs_inode *nfsi = NFS_I(dir); 895 896 spin_lock(&dir->i_lock); 897 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; 898 if (!cinfo->atomic || cinfo->before != dir->i_version) 899 nfs_force_lookup_revalidate(dir); 900 dir->i_version = cinfo->after; 901 nfs_fscache_invalidate(dir); 902 spin_unlock(&dir->i_lock); 903 } 904 905 struct nfs4_opendata { 906 struct kref kref; 907 struct nfs_openargs o_arg; 908 struct nfs_openres o_res; 909 struct nfs_open_confirmargs c_arg; 910 struct nfs_open_confirmres c_res; 911 struct nfs4_string owner_name; 912 struct nfs4_string group_name; 913 struct nfs_fattr f_attr; 914 struct nfs4_label *f_label; 915 struct dentry *dir; 916 struct dentry *dentry; 917 struct nfs4_state_owner *owner; 918 struct nfs4_state *state; 919 struct iattr attrs; 920 unsigned long timestamp; 921 unsigned int rpc_done : 1; 922 unsigned int file_created : 1; 923 unsigned int is_recover : 1; 924 int rpc_status; 925 int cancelled; 926 }; 927 928 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 929 int err, struct nfs4_exception *exception) 930 { 931 if (err != -EINVAL) 932 return false; 933 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 934 return false; 935 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 936 exception->retry = 1; 937 return true; 938 } 939 940 static enum open_claim_type4 941 nfs4_map_atomic_open_claim(struct nfs_server *server, 942 enum open_claim_type4 claim) 943 { 944 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 945 return claim; 946 switch (claim) { 947 default: 948 return claim; 949 case NFS4_OPEN_CLAIM_FH: 950 return NFS4_OPEN_CLAIM_NULL; 951 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 952 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 953 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 954 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 955 } 956 } 957 958 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 959 { 960 p->o_res.f_attr = &p->f_attr; 961 p->o_res.f_label = p->f_label; 962 p->o_res.seqid = p->o_arg.seqid; 963 p->c_res.seqid = p->c_arg.seqid; 964 p->o_res.server = p->o_arg.server; 965 p->o_res.access_request = p->o_arg.access; 966 nfs_fattr_init(&p->f_attr); 967 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 968 } 969 970 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 971 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 972 const struct iattr *attrs, 973 struct nfs4_label *label, 974 enum open_claim_type4 claim, 975 gfp_t gfp_mask) 976 { 977 struct dentry *parent = dget_parent(dentry); 978 struct inode *dir = parent->d_inode; 979 struct nfs_server *server = NFS_SERVER(dir); 980 struct nfs4_opendata *p; 981 982 p = kzalloc(sizeof(*p), gfp_mask); 983 if (p == NULL) 984 goto err; 985 986 p->f_label = nfs4_label_alloc(server, gfp_mask); 987 if (IS_ERR(p->f_label)) 988 goto err_free_p; 989 990 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask); 991 if (p->o_arg.seqid == NULL) 992 goto err_free_label; 993 nfs_sb_active(dentry->d_sb); 994 p->dentry = dget(dentry); 995 p->dir = parent; 996 p->owner = sp; 997 atomic_inc(&sp->so_count); 998 p->o_arg.open_flags = flags; 999 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1000 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS 1001 * will return permission denied for all bits until close */ 1002 if (!(flags & O_EXCL)) { 1003 /* ask server to check for all possible rights as results 1004 * are cached */ 1005 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | 1006 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE; 1007 } 1008 p->o_arg.clientid = server->nfs_client->cl_clientid; 1009 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1010 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1011 p->o_arg.name = &dentry->d_name; 1012 p->o_arg.server = server; 1013 p->o_arg.bitmask = nfs4_bitmask(server, label); 1014 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1015 p->o_arg.label = label; 1016 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1017 switch (p->o_arg.claim) { 1018 case NFS4_OPEN_CLAIM_NULL: 1019 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1020 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1021 p->o_arg.fh = NFS_FH(dir); 1022 break; 1023 case NFS4_OPEN_CLAIM_PREVIOUS: 1024 case NFS4_OPEN_CLAIM_FH: 1025 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1026 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1027 p->o_arg.fh = NFS_FH(dentry->d_inode); 1028 } 1029 if (attrs != NULL && attrs->ia_valid != 0) { 1030 __u32 verf[2]; 1031 1032 p->o_arg.u.attrs = &p->attrs; 1033 memcpy(&p->attrs, attrs, sizeof(p->attrs)); 1034 1035 verf[0] = jiffies; 1036 verf[1] = current->pid; 1037 memcpy(p->o_arg.u.verifier.data, verf, 1038 sizeof(p->o_arg.u.verifier.data)); 1039 } 1040 p->c_arg.fh = &p->o_res.fh; 1041 p->c_arg.stateid = &p->o_res.stateid; 1042 p->c_arg.seqid = p->o_arg.seqid; 1043 nfs4_init_opendata_res(p); 1044 kref_init(&p->kref); 1045 return p; 1046 1047 err_free_label: 1048 nfs4_label_free(p->f_label); 1049 err_free_p: 1050 kfree(p); 1051 err: 1052 dput(parent); 1053 return NULL; 1054 } 1055 1056 static void nfs4_opendata_free(struct kref *kref) 1057 { 1058 struct nfs4_opendata *p = container_of(kref, 1059 struct nfs4_opendata, kref); 1060 struct super_block *sb = p->dentry->d_sb; 1061 1062 nfs_free_seqid(p->o_arg.seqid); 1063 if (p->state != NULL) 1064 nfs4_put_open_state(p->state); 1065 nfs4_put_state_owner(p->owner); 1066 1067 nfs4_label_free(p->f_label); 1068 1069 dput(p->dir); 1070 dput(p->dentry); 1071 nfs_sb_deactive(sb); 1072 nfs_fattr_free_names(&p->f_attr); 1073 kfree(p); 1074 } 1075 1076 static void nfs4_opendata_put(struct nfs4_opendata *p) 1077 { 1078 if (p != NULL) 1079 kref_put(&p->kref, nfs4_opendata_free); 1080 } 1081 1082 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) 1083 { 1084 int ret; 1085 1086 ret = rpc_wait_for_completion_task(task); 1087 return ret; 1088 } 1089 1090 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) 1091 { 1092 int ret = 0; 1093 1094 if (open_mode & (O_EXCL|O_TRUNC)) 1095 goto out; 1096 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1097 case FMODE_READ: 1098 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1099 && state->n_rdonly != 0; 1100 break; 1101 case FMODE_WRITE: 1102 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1103 && state->n_wronly != 0; 1104 break; 1105 case FMODE_READ|FMODE_WRITE: 1106 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1107 && state->n_rdwr != 0; 1108 } 1109 out: 1110 return ret; 1111 } 1112 1113 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) 1114 { 1115 if (delegation == NULL) 1116 return 0; 1117 if ((delegation->type & fmode) != fmode) 1118 return 0; 1119 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1120 return 0; 1121 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) 1122 return 0; 1123 nfs_mark_delegation_referenced(delegation); 1124 return 1; 1125 } 1126 1127 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1128 { 1129 switch (fmode) { 1130 case FMODE_WRITE: 1131 state->n_wronly++; 1132 break; 1133 case FMODE_READ: 1134 state->n_rdonly++; 1135 break; 1136 case FMODE_READ|FMODE_WRITE: 1137 state->n_rdwr++; 1138 } 1139 nfs4_state_set_mode_locked(state, state->state | fmode); 1140 } 1141 1142 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) 1143 { 1144 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1145 nfs4_stateid_copy(&state->stateid, stateid); 1146 nfs4_stateid_copy(&state->open_stateid, stateid); 1147 set_bit(NFS_OPEN_STATE, &state->flags); 1148 switch (fmode) { 1149 case FMODE_READ: 1150 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1151 break; 1152 case FMODE_WRITE: 1153 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1154 break; 1155 case FMODE_READ|FMODE_WRITE: 1156 set_bit(NFS_O_RDWR_STATE, &state->flags); 1157 } 1158 } 1159 1160 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) 1161 { 1162 write_seqlock(&state->seqlock); 1163 nfs_set_open_stateid_locked(state, stateid, fmode); 1164 write_sequnlock(&state->seqlock); 1165 } 1166 1167 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) 1168 { 1169 /* 1170 * Protect the call to nfs4_state_set_mode_locked and 1171 * serialise the stateid update 1172 */ 1173 write_seqlock(&state->seqlock); 1174 if (deleg_stateid != NULL) { 1175 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1176 set_bit(NFS_DELEGATED_STATE, &state->flags); 1177 } 1178 if (open_stateid != NULL) 1179 nfs_set_open_stateid_locked(state, open_stateid, fmode); 1180 write_sequnlock(&state->seqlock); 1181 spin_lock(&state->owner->so_lock); 1182 update_open_stateflags(state, fmode); 1183 spin_unlock(&state->owner->so_lock); 1184 } 1185 1186 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) 1187 { 1188 struct nfs_inode *nfsi = NFS_I(state->inode); 1189 struct nfs_delegation *deleg_cur; 1190 int ret = 0; 1191 1192 fmode &= (FMODE_READ|FMODE_WRITE); 1193 1194 rcu_read_lock(); 1195 deleg_cur = rcu_dereference(nfsi->delegation); 1196 if (deleg_cur == NULL) 1197 goto no_delegation; 1198 1199 spin_lock(&deleg_cur->lock); 1200 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1201 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1202 (deleg_cur->type & fmode) != fmode) 1203 goto no_delegation_unlock; 1204 1205 if (delegation == NULL) 1206 delegation = &deleg_cur->stateid; 1207 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation)) 1208 goto no_delegation_unlock; 1209 1210 nfs_mark_delegation_referenced(deleg_cur); 1211 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); 1212 ret = 1; 1213 no_delegation_unlock: 1214 spin_unlock(&deleg_cur->lock); 1215 no_delegation: 1216 rcu_read_unlock(); 1217 1218 if (!ret && open_stateid != NULL) { 1219 __update_open_stateid(state, open_stateid, NULL, fmode); 1220 ret = 1; 1221 } 1222 1223 return ret; 1224 } 1225 1226 1227 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1228 { 1229 struct nfs_delegation *delegation; 1230 1231 rcu_read_lock(); 1232 delegation = rcu_dereference(NFS_I(inode)->delegation); 1233 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1234 rcu_read_unlock(); 1235 return; 1236 } 1237 rcu_read_unlock(); 1238 nfs4_inode_return_delegation(inode); 1239 } 1240 1241 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1242 { 1243 struct nfs4_state *state = opendata->state; 1244 struct nfs_inode *nfsi = NFS_I(state->inode); 1245 struct nfs_delegation *delegation; 1246 int open_mode = opendata->o_arg.open_flags; 1247 fmode_t fmode = opendata->o_arg.fmode; 1248 nfs4_stateid stateid; 1249 int ret = -EAGAIN; 1250 1251 for (;;) { 1252 if (can_open_cached(state, fmode, open_mode)) { 1253 spin_lock(&state->owner->so_lock); 1254 if (can_open_cached(state, fmode, open_mode)) { 1255 update_open_stateflags(state, fmode); 1256 spin_unlock(&state->owner->so_lock); 1257 goto out_return_state; 1258 } 1259 spin_unlock(&state->owner->so_lock); 1260 } 1261 rcu_read_lock(); 1262 delegation = rcu_dereference(nfsi->delegation); 1263 if (!can_open_delegated(delegation, fmode)) { 1264 rcu_read_unlock(); 1265 break; 1266 } 1267 /* Save the delegation */ 1268 nfs4_stateid_copy(&stateid, &delegation->stateid); 1269 rcu_read_unlock(); 1270 nfs_release_seqid(opendata->o_arg.seqid); 1271 if (!opendata->is_recover) { 1272 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1273 if (ret != 0) 1274 goto out; 1275 } 1276 ret = -EAGAIN; 1277 1278 /* Try to update the stateid using the delegation */ 1279 if (update_open_stateid(state, NULL, &stateid, fmode)) 1280 goto out_return_state; 1281 } 1282 out: 1283 return ERR_PTR(ret); 1284 out_return_state: 1285 atomic_inc(&state->count); 1286 return state; 1287 } 1288 1289 static void 1290 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1291 { 1292 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1293 struct nfs_delegation *delegation; 1294 int delegation_flags = 0; 1295 1296 rcu_read_lock(); 1297 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1298 if (delegation) 1299 delegation_flags = delegation->flags; 1300 rcu_read_unlock(); 1301 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) { 1302 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1303 "returning a delegation for " 1304 "OPEN(CLAIM_DELEGATE_CUR)\n", 1305 clp->cl_hostname); 1306 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1307 nfs_inode_set_delegation(state->inode, 1308 data->owner->so_cred, 1309 &data->o_res); 1310 else 1311 nfs_inode_reclaim_delegation(state->inode, 1312 data->owner->so_cred, 1313 &data->o_res); 1314 } 1315 1316 /* 1317 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1318 * and update the nfs4_state. 1319 */ 1320 static struct nfs4_state * 1321 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1322 { 1323 struct inode *inode = data->state->inode; 1324 struct nfs4_state *state = data->state; 1325 int ret; 1326 1327 if (!data->rpc_done) { 1328 if (data->rpc_status) { 1329 ret = data->rpc_status; 1330 goto err; 1331 } 1332 /* cached opens have already been processed */ 1333 goto update; 1334 } 1335 1336 ret = nfs_refresh_inode(inode, &data->f_attr); 1337 if (ret) 1338 goto err; 1339 1340 if (data->o_res.delegation_type != 0) 1341 nfs4_opendata_check_deleg(data, state); 1342 update: 1343 update_open_stateid(state, &data->o_res.stateid, NULL, 1344 data->o_arg.fmode); 1345 atomic_inc(&state->count); 1346 1347 return state; 1348 err: 1349 return ERR_PTR(ret); 1350 1351 } 1352 1353 static struct nfs4_state * 1354 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1355 { 1356 struct inode *inode; 1357 struct nfs4_state *state = NULL; 1358 int ret; 1359 1360 if (!data->rpc_done) { 1361 state = nfs4_try_open_cached(data); 1362 goto out; 1363 } 1364 1365 ret = -EAGAIN; 1366 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 1367 goto err; 1368 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label); 1369 ret = PTR_ERR(inode); 1370 if (IS_ERR(inode)) 1371 goto err; 1372 ret = -ENOMEM; 1373 state = nfs4_get_open_state(inode, data->owner); 1374 if (state == NULL) 1375 goto err_put_inode; 1376 if (data->o_res.delegation_type != 0) 1377 nfs4_opendata_check_deleg(data, state); 1378 update_open_stateid(state, &data->o_res.stateid, NULL, 1379 data->o_arg.fmode); 1380 iput(inode); 1381 out: 1382 nfs_release_seqid(data->o_arg.seqid); 1383 return state; 1384 err_put_inode: 1385 iput(inode); 1386 err: 1387 return ERR_PTR(ret); 1388 } 1389 1390 static struct nfs4_state * 1391 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1392 { 1393 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 1394 return _nfs4_opendata_reclaim_to_nfs4_state(data); 1395 return _nfs4_opendata_to_nfs4_state(data); 1396 } 1397 1398 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) 1399 { 1400 struct nfs_inode *nfsi = NFS_I(state->inode); 1401 struct nfs_open_context *ctx; 1402 1403 spin_lock(&state->inode->i_lock); 1404 list_for_each_entry(ctx, &nfsi->open_files, list) { 1405 if (ctx->state != state) 1406 continue; 1407 get_nfs_open_context(ctx); 1408 spin_unlock(&state->inode->i_lock); 1409 return ctx; 1410 } 1411 spin_unlock(&state->inode->i_lock); 1412 return ERR_PTR(-ENOENT); 1413 } 1414 1415 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 1416 struct nfs4_state *state, enum open_claim_type4 claim) 1417 { 1418 struct nfs4_opendata *opendata; 1419 1420 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 1421 NULL, NULL, claim, GFP_NOFS); 1422 if (opendata == NULL) 1423 return ERR_PTR(-ENOMEM); 1424 opendata->state = state; 1425 atomic_inc(&state->count); 1426 return opendata; 1427 } 1428 1429 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) 1430 { 1431 struct nfs4_state *newstate; 1432 int ret; 1433 1434 opendata->o_arg.open_flags = 0; 1435 opendata->o_arg.fmode = fmode; 1436 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 1437 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 1438 nfs4_init_opendata_res(opendata); 1439 ret = _nfs4_recover_proc_open(opendata); 1440 if (ret != 0) 1441 return ret; 1442 newstate = nfs4_opendata_to_nfs4_state(opendata); 1443 if (IS_ERR(newstate)) 1444 return PTR_ERR(newstate); 1445 nfs4_close_state(newstate, fmode); 1446 *res = newstate; 1447 return 0; 1448 } 1449 1450 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 1451 { 1452 struct nfs4_state *newstate; 1453 int ret; 1454 1455 /* memory barrier prior to reading state->n_* */ 1456 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1457 clear_bit(NFS_OPEN_STATE, &state->flags); 1458 smp_rmb(); 1459 if (state->n_rdwr != 0) { 1460 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1461 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); 1462 if (ret != 0) 1463 return ret; 1464 if (newstate != state) 1465 return -ESTALE; 1466 } 1467 if (state->n_wronly != 0) { 1468 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1469 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); 1470 if (ret != 0) 1471 return ret; 1472 if (newstate != state) 1473 return -ESTALE; 1474 } 1475 if (state->n_rdonly != 0) { 1476 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1477 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); 1478 if (ret != 0) 1479 return ret; 1480 if (newstate != state) 1481 return -ESTALE; 1482 } 1483 /* 1484 * We may have performed cached opens for all three recoveries. 1485 * Check if we need to update the current stateid. 1486 */ 1487 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 1488 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 1489 write_seqlock(&state->seqlock); 1490 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1491 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1492 write_sequnlock(&state->seqlock); 1493 } 1494 return 0; 1495 } 1496 1497 /* 1498 * OPEN_RECLAIM: 1499 * reclaim state on the server after a reboot. 1500 */ 1501 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 1502 { 1503 struct nfs_delegation *delegation; 1504 struct nfs4_opendata *opendata; 1505 fmode_t delegation_type = 0; 1506 int status; 1507 1508 opendata = nfs4_open_recoverdata_alloc(ctx, state, 1509 NFS4_OPEN_CLAIM_PREVIOUS); 1510 if (IS_ERR(opendata)) 1511 return PTR_ERR(opendata); 1512 rcu_read_lock(); 1513 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1514 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 1515 delegation_type = delegation->type; 1516 rcu_read_unlock(); 1517 opendata->o_arg.u.delegation_type = delegation_type; 1518 status = nfs4_open_recover(opendata, state); 1519 nfs4_opendata_put(opendata); 1520 return status; 1521 } 1522 1523 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 1524 { 1525 struct nfs_server *server = NFS_SERVER(state->inode); 1526 struct nfs4_exception exception = { }; 1527 int err; 1528 do { 1529 err = _nfs4_do_open_reclaim(ctx, state); 1530 trace_nfs4_open_reclaim(ctx, 0, err); 1531 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 1532 continue; 1533 if (err != -NFS4ERR_DELAY) 1534 break; 1535 nfs4_handle_exception(server, err, &exception); 1536 } while (exception.retry); 1537 return err; 1538 } 1539 1540 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 1541 { 1542 struct nfs_open_context *ctx; 1543 int ret; 1544 1545 ctx = nfs4_state_find_open_context(state); 1546 if (IS_ERR(ctx)) 1547 return -EAGAIN; 1548 ret = nfs4_do_open_reclaim(ctx, state); 1549 put_nfs_open_context(ctx); 1550 return ret; 1551 } 1552 1553 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err) 1554 { 1555 switch (err) { 1556 default: 1557 printk(KERN_ERR "NFS: %s: unhandled error " 1558 "%d.\n", __func__, err); 1559 case 0: 1560 case -ENOENT: 1561 case -ESTALE: 1562 break; 1563 case -NFS4ERR_BADSESSION: 1564 case -NFS4ERR_BADSLOT: 1565 case -NFS4ERR_BAD_HIGH_SLOT: 1566 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 1567 case -NFS4ERR_DEADSESSION: 1568 set_bit(NFS_DELEGATED_STATE, &state->flags); 1569 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); 1570 return -EAGAIN; 1571 case -NFS4ERR_STALE_CLIENTID: 1572 case -NFS4ERR_STALE_STATEID: 1573 set_bit(NFS_DELEGATED_STATE, &state->flags); 1574 case -NFS4ERR_EXPIRED: 1575 /* Don't recall a delegation if it was lost */ 1576 nfs4_schedule_lease_recovery(server->nfs_client); 1577 return -EAGAIN; 1578 case -NFS4ERR_MOVED: 1579 nfs4_schedule_migration_recovery(server); 1580 return -EAGAIN; 1581 case -NFS4ERR_LEASE_MOVED: 1582 nfs4_schedule_lease_moved_recovery(server->nfs_client); 1583 return -EAGAIN; 1584 case -NFS4ERR_DELEG_REVOKED: 1585 case -NFS4ERR_ADMIN_REVOKED: 1586 case -NFS4ERR_BAD_STATEID: 1587 case -NFS4ERR_OPENMODE: 1588 nfs_inode_find_state_and_recover(state->inode, 1589 stateid); 1590 nfs4_schedule_stateid_recovery(server, state); 1591 return 0; 1592 case -NFS4ERR_DELAY: 1593 case -NFS4ERR_GRACE: 1594 set_bit(NFS_DELEGATED_STATE, &state->flags); 1595 ssleep(1); 1596 return -EAGAIN; 1597 case -ENOMEM: 1598 case -NFS4ERR_DENIED: 1599 /* kill_proc(fl->fl_pid, SIGLOST, 1); */ 1600 return 0; 1601 } 1602 return err; 1603 } 1604 1605 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) 1606 { 1607 struct nfs_server *server = NFS_SERVER(state->inode); 1608 struct nfs4_opendata *opendata; 1609 int err; 1610 1611 opendata = nfs4_open_recoverdata_alloc(ctx, state, 1612 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 1613 if (IS_ERR(opendata)) 1614 return PTR_ERR(opendata); 1615 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 1616 err = nfs4_open_recover(opendata, state); 1617 nfs4_opendata_put(opendata); 1618 return nfs4_handle_delegation_recall_error(server, state, stateid, err); 1619 } 1620 1621 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 1622 { 1623 struct nfs4_opendata *data = calldata; 1624 1625 nfs40_setup_sequence(data->o_arg.server, &data->o_arg.seq_args, 1626 &data->o_res.seq_res, task); 1627 } 1628 1629 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 1630 { 1631 struct nfs4_opendata *data = calldata; 1632 1633 nfs40_sequence_done(task, &data->o_res.seq_res); 1634 1635 data->rpc_status = task->tk_status; 1636 if (data->rpc_status == 0) { 1637 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 1638 nfs_confirm_seqid(&data->owner->so_seqid, 0); 1639 renew_lease(data->o_res.server, data->timestamp); 1640 data->rpc_done = 1; 1641 } 1642 } 1643 1644 static void nfs4_open_confirm_release(void *calldata) 1645 { 1646 struct nfs4_opendata *data = calldata; 1647 struct nfs4_state *state = NULL; 1648 1649 /* If this request hasn't been cancelled, do nothing */ 1650 if (data->cancelled == 0) 1651 goto out_free; 1652 /* In case of error, no cleanup! */ 1653 if (!data->rpc_done) 1654 goto out_free; 1655 state = nfs4_opendata_to_nfs4_state(data); 1656 if (!IS_ERR(state)) 1657 nfs4_close_state(state, data->o_arg.fmode); 1658 out_free: 1659 nfs4_opendata_put(data); 1660 } 1661 1662 static const struct rpc_call_ops nfs4_open_confirm_ops = { 1663 .rpc_call_prepare = nfs4_open_confirm_prepare, 1664 .rpc_call_done = nfs4_open_confirm_done, 1665 .rpc_release = nfs4_open_confirm_release, 1666 }; 1667 1668 /* 1669 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 1670 */ 1671 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 1672 { 1673 struct nfs_server *server = NFS_SERVER(data->dir->d_inode); 1674 struct rpc_task *task; 1675 struct rpc_message msg = { 1676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 1677 .rpc_argp = &data->c_arg, 1678 .rpc_resp = &data->c_res, 1679 .rpc_cred = data->owner->so_cred, 1680 }; 1681 struct rpc_task_setup task_setup_data = { 1682 .rpc_client = server->client, 1683 .rpc_message = &msg, 1684 .callback_ops = &nfs4_open_confirm_ops, 1685 .callback_data = data, 1686 .workqueue = nfsiod_workqueue, 1687 .flags = RPC_TASK_ASYNC, 1688 }; 1689 int status; 1690 1691 nfs4_init_sequence(&data->o_arg.seq_args, &data->o_res.seq_res, 1); 1692 kref_get(&data->kref); 1693 data->rpc_done = 0; 1694 data->rpc_status = 0; 1695 data->timestamp = jiffies; 1696 task = rpc_run_task(&task_setup_data); 1697 if (IS_ERR(task)) 1698 return PTR_ERR(task); 1699 status = nfs4_wait_for_completion_rpc_task(task); 1700 if (status != 0) { 1701 data->cancelled = 1; 1702 smp_wmb(); 1703 } else 1704 status = data->rpc_status; 1705 rpc_put_task(task); 1706 return status; 1707 } 1708 1709 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 1710 { 1711 struct nfs4_opendata *data = calldata; 1712 struct nfs4_state_owner *sp = data->owner; 1713 struct nfs_client *clp = sp->so_server->nfs_client; 1714 1715 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 1716 goto out_wait; 1717 /* 1718 * Check if we still need to send an OPEN call, or if we can use 1719 * a delegation instead. 1720 */ 1721 if (data->state != NULL) { 1722 struct nfs_delegation *delegation; 1723 1724 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) 1725 goto out_no_action; 1726 rcu_read_lock(); 1727 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); 1728 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR && 1729 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH && 1730 can_open_delegated(delegation, data->o_arg.fmode)) 1731 goto unlock_no_action; 1732 rcu_read_unlock(); 1733 } 1734 /* Update client id. */ 1735 data->o_arg.clientid = clp->cl_clientid; 1736 switch (data->o_arg.claim) { 1737 case NFS4_OPEN_CLAIM_PREVIOUS: 1738 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1739 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1740 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 1741 case NFS4_OPEN_CLAIM_FH: 1742 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 1743 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); 1744 } 1745 data->timestamp = jiffies; 1746 if (nfs4_setup_sequence(data->o_arg.server, 1747 &data->o_arg.seq_args, 1748 &data->o_res.seq_res, 1749 task) != 0) 1750 nfs_release_seqid(data->o_arg.seqid); 1751 1752 /* Set the create mode (note dependency on the session type) */ 1753 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 1754 if (data->o_arg.open_flags & O_EXCL) { 1755 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 1756 if (nfs4_has_persistent_session(clp)) 1757 data->o_arg.createmode = NFS4_CREATE_GUARDED; 1758 else if (clp->cl_mvops->minor_version > 0) 1759 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 1760 } 1761 return; 1762 unlock_no_action: 1763 rcu_read_unlock(); 1764 out_no_action: 1765 task->tk_action = NULL; 1766 out_wait: 1767 nfs4_sequence_done(task, &data->o_res.seq_res); 1768 } 1769 1770 static void nfs4_open_done(struct rpc_task *task, void *calldata) 1771 { 1772 struct nfs4_opendata *data = calldata; 1773 1774 data->rpc_status = task->tk_status; 1775 1776 if (!nfs4_sequence_done(task, &data->o_res.seq_res)) 1777 return; 1778 1779 if (task->tk_status == 0) { 1780 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 1781 switch (data->o_res.f_attr->mode & S_IFMT) { 1782 case S_IFREG: 1783 break; 1784 case S_IFLNK: 1785 data->rpc_status = -ELOOP; 1786 break; 1787 case S_IFDIR: 1788 data->rpc_status = -EISDIR; 1789 break; 1790 default: 1791 data->rpc_status = -ENOTDIR; 1792 } 1793 } 1794 renew_lease(data->o_res.server, data->timestamp); 1795 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 1796 nfs_confirm_seqid(&data->owner->so_seqid, 0); 1797 } 1798 data->rpc_done = 1; 1799 } 1800 1801 static void nfs4_open_release(void *calldata) 1802 { 1803 struct nfs4_opendata *data = calldata; 1804 struct nfs4_state *state = NULL; 1805 1806 /* If this request hasn't been cancelled, do nothing */ 1807 if (data->cancelled == 0) 1808 goto out_free; 1809 /* In case of error, no cleanup! */ 1810 if (data->rpc_status != 0 || !data->rpc_done) 1811 goto out_free; 1812 /* In case we need an open_confirm, no cleanup! */ 1813 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 1814 goto out_free; 1815 state = nfs4_opendata_to_nfs4_state(data); 1816 if (!IS_ERR(state)) 1817 nfs4_close_state(state, data->o_arg.fmode); 1818 out_free: 1819 nfs4_opendata_put(data); 1820 } 1821 1822 static const struct rpc_call_ops nfs4_open_ops = { 1823 .rpc_call_prepare = nfs4_open_prepare, 1824 .rpc_call_done = nfs4_open_done, 1825 .rpc_release = nfs4_open_release, 1826 }; 1827 1828 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) 1829 { 1830 struct inode *dir = data->dir->d_inode; 1831 struct nfs_server *server = NFS_SERVER(dir); 1832 struct nfs_openargs *o_arg = &data->o_arg; 1833 struct nfs_openres *o_res = &data->o_res; 1834 struct rpc_task *task; 1835 struct rpc_message msg = { 1836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 1837 .rpc_argp = o_arg, 1838 .rpc_resp = o_res, 1839 .rpc_cred = data->owner->so_cred, 1840 }; 1841 struct rpc_task_setup task_setup_data = { 1842 .rpc_client = server->client, 1843 .rpc_message = &msg, 1844 .callback_ops = &nfs4_open_ops, 1845 .callback_data = data, 1846 .workqueue = nfsiod_workqueue, 1847 .flags = RPC_TASK_ASYNC, 1848 }; 1849 int status; 1850 1851 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1); 1852 kref_get(&data->kref); 1853 data->rpc_done = 0; 1854 data->rpc_status = 0; 1855 data->cancelled = 0; 1856 data->is_recover = 0; 1857 if (isrecover) { 1858 nfs4_set_sequence_privileged(&o_arg->seq_args); 1859 data->is_recover = 1; 1860 } 1861 task = rpc_run_task(&task_setup_data); 1862 if (IS_ERR(task)) 1863 return PTR_ERR(task); 1864 status = nfs4_wait_for_completion_rpc_task(task); 1865 if (status != 0) { 1866 data->cancelled = 1; 1867 smp_wmb(); 1868 } else 1869 status = data->rpc_status; 1870 rpc_put_task(task); 1871 1872 return status; 1873 } 1874 1875 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 1876 { 1877 struct inode *dir = data->dir->d_inode; 1878 struct nfs_openres *o_res = &data->o_res; 1879 int status; 1880 1881 status = nfs4_run_open_task(data, 1); 1882 if (status != 0 || !data->rpc_done) 1883 return status; 1884 1885 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 1886 1887 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 1888 status = _nfs4_proc_open_confirm(data); 1889 if (status != 0) 1890 return status; 1891 } 1892 1893 return status; 1894 } 1895 1896 static int nfs4_opendata_access(struct rpc_cred *cred, 1897 struct nfs4_opendata *opendata, 1898 struct nfs4_state *state, fmode_t fmode, 1899 int openflags) 1900 { 1901 struct nfs_access_entry cache; 1902 u32 mask; 1903 1904 /* access call failed or for some reason the server doesn't 1905 * support any access modes -- defer access call until later */ 1906 if (opendata->o_res.access_supported == 0) 1907 return 0; 1908 1909 mask = 0; 1910 /* don't check MAY_WRITE - a newly created file may not have 1911 * write mode bits, but POSIX allows the creating process to write. 1912 * use openflags to check for exec, because fmode won't 1913 * always have FMODE_EXEC set when file open for exec. */ 1914 if (openflags & __FMODE_EXEC) { 1915 /* ONLY check for exec rights */ 1916 mask = MAY_EXEC; 1917 } else if (fmode & FMODE_READ) 1918 mask = MAY_READ; 1919 1920 cache.cred = cred; 1921 cache.jiffies = jiffies; 1922 nfs_access_set_mask(&cache, opendata->o_res.access_result); 1923 nfs_access_add_cache(state->inode, &cache); 1924 1925 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0) 1926 return 0; 1927 1928 /* even though OPEN succeeded, access is denied. Close the file */ 1929 nfs4_close_state(state, fmode); 1930 return -EACCES; 1931 } 1932 1933 /* 1934 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 1935 */ 1936 static int _nfs4_proc_open(struct nfs4_opendata *data) 1937 { 1938 struct inode *dir = data->dir->d_inode; 1939 struct nfs_server *server = NFS_SERVER(dir); 1940 struct nfs_openargs *o_arg = &data->o_arg; 1941 struct nfs_openres *o_res = &data->o_res; 1942 int status; 1943 1944 status = nfs4_run_open_task(data, 0); 1945 if (!data->rpc_done) 1946 return status; 1947 if (status != 0) { 1948 if (status == -NFS4ERR_BADNAME && 1949 !(o_arg->open_flags & O_CREAT)) 1950 return -ENOENT; 1951 return status; 1952 } 1953 1954 nfs_fattr_map_and_free_names(server, &data->f_attr); 1955 1956 if (o_arg->open_flags & O_CREAT) { 1957 update_changeattr(dir, &o_res->cinfo); 1958 if (o_arg->open_flags & O_EXCL) 1959 data->file_created = 1; 1960 else if (o_res->cinfo.before != o_res->cinfo.after) 1961 data->file_created = 1; 1962 } 1963 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 1964 server->caps &= ~NFS_CAP_POSIX_LOCK; 1965 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 1966 status = _nfs4_proc_open_confirm(data); 1967 if (status != 0) 1968 return status; 1969 } 1970 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) 1971 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label); 1972 return 0; 1973 } 1974 1975 static int nfs4_recover_expired_lease(struct nfs_server *server) 1976 { 1977 return nfs4_client_recover_expired_lease(server->nfs_client); 1978 } 1979 1980 /* 1981 * OPEN_EXPIRED: 1982 * reclaim state on the server after a network partition. 1983 * Assumes caller holds the appropriate lock 1984 */ 1985 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 1986 { 1987 struct nfs4_opendata *opendata; 1988 int ret; 1989 1990 opendata = nfs4_open_recoverdata_alloc(ctx, state, 1991 NFS4_OPEN_CLAIM_FH); 1992 if (IS_ERR(opendata)) 1993 return PTR_ERR(opendata); 1994 ret = nfs4_open_recover(opendata, state); 1995 if (ret == -ESTALE) 1996 d_drop(ctx->dentry); 1997 nfs4_opendata_put(opendata); 1998 return ret; 1999 } 2000 2001 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2002 { 2003 struct nfs_server *server = NFS_SERVER(state->inode); 2004 struct nfs4_exception exception = { }; 2005 int err; 2006 2007 do { 2008 err = _nfs4_open_expired(ctx, state); 2009 trace_nfs4_open_expired(ctx, 0, err); 2010 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2011 continue; 2012 switch (err) { 2013 default: 2014 goto out; 2015 case -NFS4ERR_GRACE: 2016 case -NFS4ERR_DELAY: 2017 nfs4_handle_exception(server, err, &exception); 2018 err = 0; 2019 } 2020 } while (exception.retry); 2021 out: 2022 return err; 2023 } 2024 2025 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2026 { 2027 struct nfs_open_context *ctx; 2028 int ret; 2029 2030 ctx = nfs4_state_find_open_context(state); 2031 if (IS_ERR(ctx)) 2032 return -EAGAIN; 2033 ret = nfs4_do_open_expired(ctx, state); 2034 put_nfs_open_context(ctx); 2035 return ret; 2036 } 2037 2038 #if defined(CONFIG_NFS_V4_1) 2039 static void nfs41_clear_delegation_stateid(struct nfs4_state *state) 2040 { 2041 struct nfs_server *server = NFS_SERVER(state->inode); 2042 nfs4_stateid *stateid = &state->stateid; 2043 struct nfs_delegation *delegation; 2044 struct rpc_cred *cred = NULL; 2045 int status = -NFS4ERR_BAD_STATEID; 2046 2047 /* If a state reset has been done, test_stateid is unneeded */ 2048 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2049 return; 2050 2051 /* Get the delegation credential for use by test/free_stateid */ 2052 rcu_read_lock(); 2053 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2054 if (delegation != NULL && 2055 nfs4_stateid_match(&delegation->stateid, stateid)) { 2056 cred = get_rpccred(delegation->cred); 2057 rcu_read_unlock(); 2058 status = nfs41_test_stateid(server, stateid, cred); 2059 trace_nfs4_test_delegation_stateid(state, NULL, status); 2060 } else 2061 rcu_read_unlock(); 2062 2063 if (status != NFS_OK) { 2064 /* Free the stateid unless the server explicitly 2065 * informs us the stateid is unrecognized. */ 2066 if (status != -NFS4ERR_BAD_STATEID) 2067 nfs41_free_stateid(server, stateid, cred); 2068 nfs_remove_bad_delegation(state->inode); 2069 2070 write_seqlock(&state->seqlock); 2071 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2072 write_sequnlock(&state->seqlock); 2073 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2074 } 2075 2076 if (cred != NULL) 2077 put_rpccred(cred); 2078 } 2079 2080 /** 2081 * nfs41_check_open_stateid - possibly free an open stateid 2082 * 2083 * @state: NFSv4 state for an inode 2084 * 2085 * Returns NFS_OK if recovery for this stateid is now finished. 2086 * Otherwise a negative NFS4ERR value is returned. 2087 */ 2088 static int nfs41_check_open_stateid(struct nfs4_state *state) 2089 { 2090 struct nfs_server *server = NFS_SERVER(state->inode); 2091 nfs4_stateid *stateid = &state->open_stateid; 2092 struct rpc_cred *cred = state->owner->so_cred; 2093 int status; 2094 2095 /* If a state reset has been done, test_stateid is unneeded */ 2096 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) && 2097 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) && 2098 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0)) 2099 return -NFS4ERR_BAD_STATEID; 2100 2101 status = nfs41_test_stateid(server, stateid, cred); 2102 trace_nfs4_test_open_stateid(state, NULL, status); 2103 if (status != NFS_OK) { 2104 /* Free the stateid unless the server explicitly 2105 * informs us the stateid is unrecognized. */ 2106 if (status != -NFS4ERR_BAD_STATEID) 2107 nfs41_free_stateid(server, stateid, cred); 2108 2109 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 2110 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 2111 clear_bit(NFS_O_RDWR_STATE, &state->flags); 2112 clear_bit(NFS_OPEN_STATE, &state->flags); 2113 } 2114 return status; 2115 } 2116 2117 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2118 { 2119 int status; 2120 2121 nfs41_clear_delegation_stateid(state); 2122 status = nfs41_check_open_stateid(state); 2123 if (status != NFS_OK) 2124 status = nfs4_open_expired(sp, state); 2125 return status; 2126 } 2127 #endif 2128 2129 /* 2130 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2131 * fields corresponding to attributes that were used to store the verifier. 2132 * Make sure we clobber those fields in the later setattr call 2133 */ 2134 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) 2135 { 2136 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && 2137 !(sattr->ia_valid & ATTR_ATIME_SET)) 2138 sattr->ia_valid |= ATTR_ATIME; 2139 2140 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && 2141 !(sattr->ia_valid & ATTR_MTIME_SET)) 2142 sattr->ia_valid |= ATTR_MTIME; 2143 } 2144 2145 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 2146 fmode_t fmode, 2147 int flags, 2148 struct nfs_open_context *ctx) 2149 { 2150 struct nfs4_state_owner *sp = opendata->owner; 2151 struct nfs_server *server = sp->so_server; 2152 struct dentry *dentry; 2153 struct nfs4_state *state; 2154 unsigned int seq; 2155 int ret; 2156 2157 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 2158 2159 ret = _nfs4_proc_open(opendata); 2160 if (ret != 0) 2161 goto out; 2162 2163 state = nfs4_opendata_to_nfs4_state(opendata); 2164 ret = PTR_ERR(state); 2165 if (IS_ERR(state)) 2166 goto out; 2167 if (server->caps & NFS_CAP_POSIX_LOCK) 2168 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 2169 2170 dentry = opendata->dentry; 2171 if (dentry->d_inode == NULL) { 2172 /* FIXME: Is this d_drop() ever needed? */ 2173 d_drop(dentry); 2174 dentry = d_add_unique(dentry, igrab(state->inode)); 2175 if (dentry == NULL) { 2176 dentry = opendata->dentry; 2177 } else if (dentry != ctx->dentry) { 2178 dput(ctx->dentry); 2179 ctx->dentry = dget(dentry); 2180 } 2181 nfs_set_verifier(dentry, 2182 nfs_save_change_attribute(opendata->dir->d_inode)); 2183 } 2184 2185 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags); 2186 if (ret != 0) 2187 goto out; 2188 2189 ctx->state = state; 2190 if (dentry->d_inode == state->inode) { 2191 nfs_inode_attach_open_context(ctx); 2192 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 2193 nfs4_schedule_stateid_recovery(server, state); 2194 } 2195 out: 2196 return ret; 2197 } 2198 2199 /* 2200 * Returns a referenced nfs4_state 2201 */ 2202 static int _nfs4_do_open(struct inode *dir, 2203 struct nfs_open_context *ctx, 2204 int flags, 2205 struct iattr *sattr, 2206 struct nfs4_label *label, 2207 int *opened) 2208 { 2209 struct nfs4_state_owner *sp; 2210 struct nfs4_state *state = NULL; 2211 struct nfs_server *server = NFS_SERVER(dir); 2212 struct nfs4_opendata *opendata; 2213 struct dentry *dentry = ctx->dentry; 2214 struct rpc_cred *cred = ctx->cred; 2215 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 2216 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 2217 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 2218 struct nfs4_label *olabel = NULL; 2219 int status; 2220 2221 /* Protect against reboot recovery conflicts */ 2222 status = -ENOMEM; 2223 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 2224 if (sp == NULL) { 2225 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 2226 goto out_err; 2227 } 2228 status = nfs4_recover_expired_lease(server); 2229 if (status != 0) 2230 goto err_put_state_owner; 2231 if (dentry->d_inode != NULL) 2232 nfs4_return_incompatible_delegation(dentry->d_inode, fmode); 2233 status = -ENOMEM; 2234 if (dentry->d_inode) 2235 claim = NFS4_OPEN_CLAIM_FH; 2236 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, 2237 label, claim, GFP_KERNEL); 2238 if (opendata == NULL) 2239 goto err_put_state_owner; 2240 2241 if (label) { 2242 olabel = nfs4_label_alloc(server, GFP_KERNEL); 2243 if (IS_ERR(olabel)) { 2244 status = PTR_ERR(olabel); 2245 goto err_opendata_put; 2246 } 2247 } 2248 2249 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 2250 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 2251 if (!opendata->f_attr.mdsthreshold) 2252 goto err_free_label; 2253 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 2254 } 2255 if (dentry->d_inode != NULL) 2256 opendata->state = nfs4_get_open_state(dentry->d_inode, sp); 2257 2258 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx); 2259 if (status != 0) 2260 goto err_free_label; 2261 state = ctx->state; 2262 2263 if ((opendata->o_arg.open_flags & O_EXCL) && 2264 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 2265 nfs4_exclusive_attrset(opendata, sattr); 2266 2267 nfs_fattr_init(opendata->o_res.f_attr); 2268 status = nfs4_do_setattr(state->inode, cred, 2269 opendata->o_res.f_attr, sattr, 2270 state, label, olabel); 2271 if (status == 0) { 2272 nfs_setattr_update_inode(state->inode, sattr); 2273 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr); 2274 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); 2275 } 2276 } 2277 if (opendata->file_created) 2278 *opened |= FILE_CREATED; 2279 2280 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) 2281 *ctx_th = opendata->f_attr.mdsthreshold; 2282 else 2283 kfree(opendata->f_attr.mdsthreshold); 2284 opendata->f_attr.mdsthreshold = NULL; 2285 2286 nfs4_label_free(olabel); 2287 2288 nfs4_opendata_put(opendata); 2289 nfs4_put_state_owner(sp); 2290 return 0; 2291 err_free_label: 2292 nfs4_label_free(olabel); 2293 err_opendata_put: 2294 kfree(opendata->f_attr.mdsthreshold); 2295 nfs4_opendata_put(opendata); 2296 err_put_state_owner: 2297 nfs4_put_state_owner(sp); 2298 out_err: 2299 return status; 2300 } 2301 2302 2303 static struct nfs4_state *nfs4_do_open(struct inode *dir, 2304 struct nfs_open_context *ctx, 2305 int flags, 2306 struct iattr *sattr, 2307 struct nfs4_label *label, 2308 int *opened) 2309 { 2310 struct nfs_server *server = NFS_SERVER(dir); 2311 struct nfs4_exception exception = { }; 2312 struct nfs4_state *res; 2313 int status; 2314 2315 do { 2316 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened); 2317 res = ctx->state; 2318 trace_nfs4_open_file(ctx, flags, status); 2319 if (status == 0) 2320 break; 2321 /* NOTE: BAD_SEQID means the server and client disagree about the 2322 * book-keeping w.r.t. state-changing operations 2323 * (OPEN/CLOSE/LOCK/LOCKU...) 2324 * It is actually a sign of a bug on the client or on the server. 2325 * 2326 * If we receive a BAD_SEQID error in the particular case of 2327 * doing an OPEN, we assume that nfs_increment_open_seqid() will 2328 * have unhashed the old state_owner for us, and that we can 2329 * therefore safely retry using a new one. We should still warn 2330 * the user though... 2331 */ 2332 if (status == -NFS4ERR_BAD_SEQID) { 2333 pr_warn_ratelimited("NFS: v4 server %s " 2334 " returned a bad sequence-id error!\n", 2335 NFS_SERVER(dir)->nfs_client->cl_hostname); 2336 exception.retry = 1; 2337 continue; 2338 } 2339 /* 2340 * BAD_STATEID on OPEN means that the server cancelled our 2341 * state before it received the OPEN_CONFIRM. 2342 * Recover by retrying the request as per the discussion 2343 * on Page 181 of RFC3530. 2344 */ 2345 if (status == -NFS4ERR_BAD_STATEID) { 2346 exception.retry = 1; 2347 continue; 2348 } 2349 if (status == -EAGAIN) { 2350 /* We must have found a delegation */ 2351 exception.retry = 1; 2352 continue; 2353 } 2354 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 2355 continue; 2356 res = ERR_PTR(nfs4_handle_exception(server, 2357 status, &exception)); 2358 } while (exception.retry); 2359 return res; 2360 } 2361 2362 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 2363 struct nfs_fattr *fattr, struct iattr *sattr, 2364 struct nfs4_state *state, struct nfs4_label *ilabel, 2365 struct nfs4_label *olabel) 2366 { 2367 struct nfs_server *server = NFS_SERVER(inode); 2368 struct nfs_setattrargs arg = { 2369 .fh = NFS_FH(inode), 2370 .iap = sattr, 2371 .server = server, 2372 .bitmask = server->attr_bitmask, 2373 .label = ilabel, 2374 }; 2375 struct nfs_setattrres res = { 2376 .fattr = fattr, 2377 .label = olabel, 2378 .server = server, 2379 }; 2380 struct rpc_message msg = { 2381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 2382 .rpc_argp = &arg, 2383 .rpc_resp = &res, 2384 .rpc_cred = cred, 2385 }; 2386 unsigned long timestamp = jiffies; 2387 fmode_t fmode; 2388 bool truncate; 2389 int status; 2390 2391 arg.bitmask = nfs4_bitmask(server, ilabel); 2392 if (ilabel) 2393 arg.bitmask = nfs4_bitmask(server, olabel); 2394 2395 nfs_fattr_init(fattr); 2396 2397 /* Servers should only apply open mode checks for file size changes */ 2398 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false; 2399 fmode = truncate ? FMODE_WRITE : FMODE_READ; 2400 2401 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) { 2402 /* Use that stateid */ 2403 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) { 2404 struct nfs_lockowner lockowner = { 2405 .l_owner = current->files, 2406 .l_pid = current->tgid, 2407 }; 2408 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE, 2409 &lockowner); 2410 } else 2411 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 2412 2413 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 2414 if (status == 0 && state != NULL) 2415 renew_lease(server, timestamp); 2416 return status; 2417 } 2418 2419 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 2420 struct nfs_fattr *fattr, struct iattr *sattr, 2421 struct nfs4_state *state, struct nfs4_label *ilabel, 2422 struct nfs4_label *olabel) 2423 { 2424 struct nfs_server *server = NFS_SERVER(inode); 2425 struct nfs4_exception exception = { 2426 .state = state, 2427 .inode = inode, 2428 }; 2429 int err; 2430 do { 2431 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel); 2432 trace_nfs4_setattr(inode, err); 2433 switch (err) { 2434 case -NFS4ERR_OPENMODE: 2435 if (!(sattr->ia_valid & ATTR_SIZE)) { 2436 pr_warn_once("NFSv4: server %s is incorrectly " 2437 "applying open mode checks to " 2438 "a SETATTR that is not " 2439 "changing file size.\n", 2440 server->nfs_client->cl_hostname); 2441 } 2442 if (state && !(state->state & FMODE_WRITE)) { 2443 err = -EBADF; 2444 if (sattr->ia_valid & ATTR_OPEN) 2445 err = -EACCES; 2446 goto out; 2447 } 2448 } 2449 err = nfs4_handle_exception(server, err, &exception); 2450 } while (exception.retry); 2451 out: 2452 return err; 2453 } 2454 2455 struct nfs4_closedata { 2456 struct inode *inode; 2457 struct nfs4_state *state; 2458 struct nfs_closeargs arg; 2459 struct nfs_closeres res; 2460 struct nfs_fattr fattr; 2461 unsigned long timestamp; 2462 bool roc; 2463 u32 roc_barrier; 2464 }; 2465 2466 static void nfs4_free_closedata(void *data) 2467 { 2468 struct nfs4_closedata *calldata = data; 2469 struct nfs4_state_owner *sp = calldata->state->owner; 2470 struct super_block *sb = calldata->state->inode->i_sb; 2471 2472 if (calldata->roc) 2473 pnfs_roc_release(calldata->state->inode); 2474 nfs4_put_open_state(calldata->state); 2475 nfs_free_seqid(calldata->arg.seqid); 2476 nfs4_put_state_owner(sp); 2477 nfs_sb_deactive(sb); 2478 kfree(calldata); 2479 } 2480 2481 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state, 2482 fmode_t fmode) 2483 { 2484 spin_lock(&state->owner->so_lock); 2485 clear_bit(NFS_O_RDWR_STATE, &state->flags); 2486 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 2487 case FMODE_WRITE: 2488 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 2489 break; 2490 case FMODE_READ: 2491 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 2492 break; 2493 case 0: 2494 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 2495 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 2496 clear_bit(NFS_OPEN_STATE, &state->flags); 2497 } 2498 spin_unlock(&state->owner->so_lock); 2499 } 2500 2501 static void nfs4_close_done(struct rpc_task *task, void *data) 2502 { 2503 struct nfs4_closedata *calldata = data; 2504 struct nfs4_state *state = calldata->state; 2505 struct nfs_server *server = NFS_SERVER(calldata->inode); 2506 2507 dprintk("%s: begin!\n", __func__); 2508 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 2509 return; 2510 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 2511 /* hmm. we are done with the inode, and in the process of freeing 2512 * the state_owner. we keep this around to process errors 2513 */ 2514 switch (task->tk_status) { 2515 case 0: 2516 if (calldata->roc) 2517 pnfs_roc_set_barrier(state->inode, 2518 calldata->roc_barrier); 2519 nfs_set_open_stateid(state, &calldata->res.stateid, 0); 2520 renew_lease(server, calldata->timestamp); 2521 break; 2522 case -NFS4ERR_ADMIN_REVOKED: 2523 case -NFS4ERR_STALE_STATEID: 2524 case -NFS4ERR_OLD_STATEID: 2525 case -NFS4ERR_BAD_STATEID: 2526 case -NFS4ERR_EXPIRED: 2527 if (calldata->arg.fmode == 0) 2528 break; 2529 default: 2530 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) { 2531 rpc_restart_call_prepare(task); 2532 goto out_release; 2533 } 2534 } 2535 nfs4_close_clear_stateid_flags(state, calldata->arg.fmode); 2536 out_release: 2537 nfs_release_seqid(calldata->arg.seqid); 2538 nfs_refresh_inode(calldata->inode, calldata->res.fattr); 2539 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); 2540 } 2541 2542 static void nfs4_close_prepare(struct rpc_task *task, void *data) 2543 { 2544 struct nfs4_closedata *calldata = data; 2545 struct nfs4_state *state = calldata->state; 2546 struct inode *inode = calldata->inode; 2547 int call_close = 0; 2548 2549 dprintk("%s: begin!\n", __func__); 2550 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 2551 goto out_wait; 2552 2553 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 2554 calldata->arg.fmode = FMODE_READ|FMODE_WRITE; 2555 spin_lock(&state->owner->so_lock); 2556 /* Calculate the change in open mode */ 2557 if (state->n_rdwr == 0) { 2558 if (state->n_rdonly == 0) { 2559 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); 2560 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); 2561 calldata->arg.fmode &= ~FMODE_READ; 2562 } 2563 if (state->n_wronly == 0) { 2564 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); 2565 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); 2566 calldata->arg.fmode &= ~FMODE_WRITE; 2567 } 2568 } 2569 if (!nfs4_valid_open_stateid(state)) 2570 call_close = 0; 2571 spin_unlock(&state->owner->so_lock); 2572 2573 if (!call_close) { 2574 /* Note: exit _without_ calling nfs4_close_done */ 2575 goto out_no_action; 2576 } 2577 2578 if (calldata->arg.fmode == 0) { 2579 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 2580 if (calldata->roc && 2581 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) { 2582 nfs_release_seqid(calldata->arg.seqid); 2583 goto out_wait; 2584 } 2585 } 2586 2587 nfs_fattr_init(calldata->res.fattr); 2588 calldata->timestamp = jiffies; 2589 if (nfs4_setup_sequence(NFS_SERVER(inode), 2590 &calldata->arg.seq_args, 2591 &calldata->res.seq_res, 2592 task) != 0) 2593 nfs_release_seqid(calldata->arg.seqid); 2594 dprintk("%s: done!\n", __func__); 2595 return; 2596 out_no_action: 2597 task->tk_action = NULL; 2598 out_wait: 2599 nfs4_sequence_done(task, &calldata->res.seq_res); 2600 } 2601 2602 static const struct rpc_call_ops nfs4_close_ops = { 2603 .rpc_call_prepare = nfs4_close_prepare, 2604 .rpc_call_done = nfs4_close_done, 2605 .rpc_release = nfs4_free_closedata, 2606 }; 2607 2608 /* 2609 * It is possible for data to be read/written from a mem-mapped file 2610 * after the sys_close call (which hits the vfs layer as a flush). 2611 * This means that we can't safely call nfsv4 close on a file until 2612 * the inode is cleared. This in turn means that we are not good 2613 * NFSv4 citizens - we do not indicate to the server to update the file's 2614 * share state even when we are done with one of the three share 2615 * stateid's in the inode. 2616 * 2617 * NOTE: Caller must be holding the sp->so_owner semaphore! 2618 */ 2619 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 2620 { 2621 struct nfs_server *server = NFS_SERVER(state->inode); 2622 struct nfs4_closedata *calldata; 2623 struct nfs4_state_owner *sp = state->owner; 2624 struct rpc_task *task; 2625 struct rpc_message msg = { 2626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 2627 .rpc_cred = state->owner->so_cred, 2628 }; 2629 struct rpc_task_setup task_setup_data = { 2630 .rpc_client = server->client, 2631 .rpc_message = &msg, 2632 .callback_ops = &nfs4_close_ops, 2633 .workqueue = nfsiod_workqueue, 2634 .flags = RPC_TASK_ASYNC, 2635 }; 2636 int status = -ENOMEM; 2637 2638 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 2639 &task_setup_data.rpc_client, &msg); 2640 2641 calldata = kzalloc(sizeof(*calldata), gfp_mask); 2642 if (calldata == NULL) 2643 goto out; 2644 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1); 2645 calldata->inode = state->inode; 2646 calldata->state = state; 2647 calldata->arg.fh = NFS_FH(state->inode); 2648 calldata->arg.stateid = &state->open_stateid; 2649 /* Serialization for the sequence id */ 2650 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask); 2651 if (calldata->arg.seqid == NULL) 2652 goto out_free_calldata; 2653 calldata->arg.fmode = 0; 2654 calldata->arg.bitmask = server->cache_consistency_bitmask; 2655 calldata->res.fattr = &calldata->fattr; 2656 calldata->res.seqid = calldata->arg.seqid; 2657 calldata->res.server = server; 2658 calldata->roc = pnfs_roc(state->inode); 2659 nfs_sb_active(calldata->inode->i_sb); 2660 2661 msg.rpc_argp = &calldata->arg; 2662 msg.rpc_resp = &calldata->res; 2663 task_setup_data.callback_data = calldata; 2664 task = rpc_run_task(&task_setup_data); 2665 if (IS_ERR(task)) 2666 return PTR_ERR(task); 2667 status = 0; 2668 if (wait) 2669 status = rpc_wait_for_completion_task(task); 2670 rpc_put_task(task); 2671 return status; 2672 out_free_calldata: 2673 kfree(calldata); 2674 out: 2675 nfs4_put_open_state(state); 2676 nfs4_put_state_owner(sp); 2677 return status; 2678 } 2679 2680 static struct inode * 2681 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 2682 int open_flags, struct iattr *attr, int *opened) 2683 { 2684 struct nfs4_state *state; 2685 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 2686 2687 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 2688 2689 /* Protect against concurrent sillydeletes */ 2690 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 2691 2692 nfs4_label_release_security(label); 2693 2694 if (IS_ERR(state)) 2695 return ERR_CAST(state); 2696 return state->inode; 2697 } 2698 2699 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 2700 { 2701 if (ctx->state == NULL) 2702 return; 2703 if (is_sync) 2704 nfs4_close_sync(ctx->state, ctx->mode); 2705 else 2706 nfs4_close_state(ctx->state, ctx->mode); 2707 } 2708 2709 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 2710 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 2711 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_CHANGE_SECURITY_LABEL - 1UL) 2712 2713 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 2714 { 2715 struct nfs4_server_caps_arg args = { 2716 .fhandle = fhandle, 2717 }; 2718 struct nfs4_server_caps_res res = {}; 2719 struct rpc_message msg = { 2720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 2721 .rpc_argp = &args, 2722 .rpc_resp = &res, 2723 }; 2724 int status; 2725 2726 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 2727 if (status == 0) { 2728 /* Sanity check the server answers */ 2729 switch (server->nfs_client->cl_minorversion) { 2730 case 0: 2731 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 2732 res.attr_bitmask[2] = 0; 2733 break; 2734 case 1: 2735 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 2736 break; 2737 case 2: 2738 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 2739 } 2740 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 2741 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| 2742 NFS_CAP_SYMLINKS|NFS_CAP_FILEID| 2743 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| 2744 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| 2745 NFS_CAP_CTIME|NFS_CAP_MTIME| 2746 NFS_CAP_SECURITY_LABEL); 2747 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL) 2748 server->caps |= NFS_CAP_ACLS; 2749 if (res.has_links != 0) 2750 server->caps |= NFS_CAP_HARDLINKS; 2751 if (res.has_symlinks != 0) 2752 server->caps |= NFS_CAP_SYMLINKS; 2753 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) 2754 server->caps |= NFS_CAP_FILEID; 2755 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) 2756 server->caps |= NFS_CAP_MODE; 2757 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) 2758 server->caps |= NFS_CAP_NLINK; 2759 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) 2760 server->caps |= NFS_CAP_OWNER; 2761 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) 2762 server->caps |= NFS_CAP_OWNER_GROUP; 2763 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) 2764 server->caps |= NFS_CAP_ATIME; 2765 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) 2766 server->caps |= NFS_CAP_CTIME; 2767 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) 2768 server->caps |= NFS_CAP_MTIME; 2769 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 2770 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 2771 server->caps |= NFS_CAP_SECURITY_LABEL; 2772 #endif 2773 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 2774 sizeof(server->attr_bitmask)); 2775 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 2776 2777 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 2778 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 2779 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 2780 server->cache_consistency_bitmask[2] = 0; 2781 server->acl_bitmask = res.acl_bitmask; 2782 server->fh_expire_type = res.fh_expire_type; 2783 } 2784 2785 return status; 2786 } 2787 2788 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 2789 { 2790 struct nfs4_exception exception = { }; 2791 int err; 2792 do { 2793 err = nfs4_handle_exception(server, 2794 _nfs4_server_capabilities(server, fhandle), 2795 &exception); 2796 } while (exception.retry); 2797 return err; 2798 } 2799 2800 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 2801 struct nfs_fsinfo *info) 2802 { 2803 u32 bitmask[3]; 2804 struct nfs4_lookup_root_arg args = { 2805 .bitmask = bitmask, 2806 }; 2807 struct nfs4_lookup_res res = { 2808 .server = server, 2809 .fattr = info->fattr, 2810 .fh = fhandle, 2811 }; 2812 struct rpc_message msg = { 2813 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 2814 .rpc_argp = &args, 2815 .rpc_resp = &res, 2816 }; 2817 2818 bitmask[0] = nfs4_fattr_bitmap[0]; 2819 bitmask[1] = nfs4_fattr_bitmap[1]; 2820 /* 2821 * Process the label in the upcoming getfattr 2822 */ 2823 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 2824 2825 nfs_fattr_init(info->fattr); 2826 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 2827 } 2828 2829 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 2830 struct nfs_fsinfo *info) 2831 { 2832 struct nfs4_exception exception = { }; 2833 int err; 2834 do { 2835 err = _nfs4_lookup_root(server, fhandle, info); 2836 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 2837 switch (err) { 2838 case 0: 2839 case -NFS4ERR_WRONGSEC: 2840 goto out; 2841 default: 2842 err = nfs4_handle_exception(server, err, &exception); 2843 } 2844 } while (exception.retry); 2845 out: 2846 return err; 2847 } 2848 2849 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 2850 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 2851 { 2852 struct rpc_auth_create_args auth_args = { 2853 .pseudoflavor = flavor, 2854 }; 2855 struct rpc_auth *auth; 2856 int ret; 2857 2858 auth = rpcauth_create(&auth_args, server->client); 2859 if (IS_ERR(auth)) { 2860 ret = -EACCES; 2861 goto out; 2862 } 2863 ret = nfs4_lookup_root(server, fhandle, info); 2864 out: 2865 return ret; 2866 } 2867 2868 /* 2869 * Retry pseudoroot lookup with various security flavors. We do this when: 2870 * 2871 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 2872 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 2873 * 2874 * Returns zero on success, or a negative NFS4ERR value, or a 2875 * negative errno value. 2876 */ 2877 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 2878 struct nfs_fsinfo *info) 2879 { 2880 /* Per 3530bis 15.33.5 */ 2881 static const rpc_authflavor_t flav_array[] = { 2882 RPC_AUTH_GSS_KRB5P, 2883 RPC_AUTH_GSS_KRB5I, 2884 RPC_AUTH_GSS_KRB5, 2885 RPC_AUTH_UNIX, /* courtesy */ 2886 RPC_AUTH_NULL, 2887 }; 2888 int status = -EPERM; 2889 size_t i; 2890 2891 if (server->auth_info.flavor_len > 0) { 2892 /* try each flavor specified by user */ 2893 for (i = 0; i < server->auth_info.flavor_len; i++) { 2894 status = nfs4_lookup_root_sec(server, fhandle, info, 2895 server->auth_info.flavors[i]); 2896 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 2897 continue; 2898 break; 2899 } 2900 } else { 2901 /* no flavors specified by user, try default list */ 2902 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 2903 status = nfs4_lookup_root_sec(server, fhandle, info, 2904 flav_array[i]); 2905 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 2906 continue; 2907 break; 2908 } 2909 } 2910 2911 /* 2912 * -EACCESS could mean that the user doesn't have correct permissions 2913 * to access the mount. It could also mean that we tried to mount 2914 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 2915 * existing mount programs don't handle -EACCES very well so it should 2916 * be mapped to -EPERM instead. 2917 */ 2918 if (status == -EACCES) 2919 status = -EPERM; 2920 return status; 2921 } 2922 2923 static int nfs4_do_find_root_sec(struct nfs_server *server, 2924 struct nfs_fh *fhandle, struct nfs_fsinfo *info) 2925 { 2926 int mv = server->nfs_client->cl_minorversion; 2927 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info); 2928 } 2929 2930 /** 2931 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 2932 * @server: initialized nfs_server handle 2933 * @fhandle: we fill in the pseudo-fs root file handle 2934 * @info: we fill in an FSINFO struct 2935 * @auth_probe: probe the auth flavours 2936 * 2937 * Returns zero on success, or a negative errno. 2938 */ 2939 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 2940 struct nfs_fsinfo *info, 2941 bool auth_probe) 2942 { 2943 int status; 2944 2945 switch (auth_probe) { 2946 case false: 2947 status = nfs4_lookup_root(server, fhandle, info); 2948 if (status != -NFS4ERR_WRONGSEC) 2949 break; 2950 default: 2951 status = nfs4_do_find_root_sec(server, fhandle, info); 2952 } 2953 2954 if (status == 0) 2955 status = nfs4_server_capabilities(server, fhandle); 2956 if (status == 0) 2957 status = nfs4_do_fsinfo(server, fhandle, info); 2958 2959 return nfs4_map_errors(status); 2960 } 2961 2962 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 2963 struct nfs_fsinfo *info) 2964 { 2965 int error; 2966 struct nfs_fattr *fattr = info->fattr; 2967 struct nfs4_label *label = NULL; 2968 2969 error = nfs4_server_capabilities(server, mntfh); 2970 if (error < 0) { 2971 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 2972 return error; 2973 } 2974 2975 label = nfs4_label_alloc(server, GFP_KERNEL); 2976 if (IS_ERR(label)) 2977 return PTR_ERR(label); 2978 2979 error = nfs4_proc_getattr(server, mntfh, fattr, label); 2980 if (error < 0) { 2981 dprintk("nfs4_get_root: getattr error = %d\n", -error); 2982 goto err_free_label; 2983 } 2984 2985 if (fattr->valid & NFS_ATTR_FATTR_FSID && 2986 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 2987 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 2988 2989 err_free_label: 2990 nfs4_label_free(label); 2991 2992 return error; 2993 } 2994 2995 /* 2996 * Get locations and (maybe) other attributes of a referral. 2997 * Note that we'll actually follow the referral later when 2998 * we detect fsid mismatch in inode revalidation 2999 */ 3000 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 3001 const struct qstr *name, struct nfs_fattr *fattr, 3002 struct nfs_fh *fhandle) 3003 { 3004 int status = -ENOMEM; 3005 struct page *page = NULL; 3006 struct nfs4_fs_locations *locations = NULL; 3007 3008 page = alloc_page(GFP_KERNEL); 3009 if (page == NULL) 3010 goto out; 3011 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 3012 if (locations == NULL) 3013 goto out; 3014 3015 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 3016 if (status != 0) 3017 goto out; 3018 3019 /* 3020 * If the fsid didn't change, this is a migration event, not a 3021 * referral. Cause us to drop into the exception handler, which 3022 * will kick off migration recovery. 3023 */ 3024 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 3025 dprintk("%s: server did not return a different fsid for" 3026 " a referral at %s\n", __func__, name->name); 3027 status = -NFS4ERR_MOVED; 3028 goto out; 3029 } 3030 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 3031 nfs_fixup_referral_attributes(&locations->fattr); 3032 3033 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 3034 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 3035 memset(fhandle, 0, sizeof(struct nfs_fh)); 3036 out: 3037 if (page) 3038 __free_page(page); 3039 kfree(locations); 3040 return status; 3041 } 3042 3043 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3044 struct nfs_fattr *fattr, struct nfs4_label *label) 3045 { 3046 struct nfs4_getattr_arg args = { 3047 .fh = fhandle, 3048 .bitmask = server->attr_bitmask, 3049 }; 3050 struct nfs4_getattr_res res = { 3051 .fattr = fattr, 3052 .label = label, 3053 .server = server, 3054 }; 3055 struct rpc_message msg = { 3056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 3057 .rpc_argp = &args, 3058 .rpc_resp = &res, 3059 }; 3060 3061 args.bitmask = nfs4_bitmask(server, label); 3062 3063 nfs_fattr_init(fattr); 3064 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3065 } 3066 3067 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3068 struct nfs_fattr *fattr, struct nfs4_label *label) 3069 { 3070 struct nfs4_exception exception = { }; 3071 int err; 3072 do { 3073 err = _nfs4_proc_getattr(server, fhandle, fattr, label); 3074 trace_nfs4_getattr(server, fhandle, fattr, err); 3075 err = nfs4_handle_exception(server, err, 3076 &exception); 3077 } while (exception.retry); 3078 return err; 3079 } 3080 3081 /* 3082 * The file is not closed if it is opened due to the a request to change 3083 * the size of the file. The open call will not be needed once the 3084 * VFS layer lookup-intents are implemented. 3085 * 3086 * Close is called when the inode is destroyed. 3087 * If we haven't opened the file for O_WRONLY, we 3088 * need to in the size_change case to obtain a stateid. 3089 * 3090 * Got race? 3091 * Because OPEN is always done by name in nfsv4, it is 3092 * possible that we opened a different file by the same 3093 * name. We can recognize this race condition, but we 3094 * can't do anything about it besides returning an error. 3095 * 3096 * This will be fixed with VFS changes (lookup-intent). 3097 */ 3098 static int 3099 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 3100 struct iattr *sattr) 3101 { 3102 struct inode *inode = dentry->d_inode; 3103 struct rpc_cred *cred = NULL; 3104 struct nfs4_state *state = NULL; 3105 struct nfs4_label *label = NULL; 3106 int status; 3107 3108 if (pnfs_ld_layoutret_on_setattr(inode)) 3109 pnfs_commit_and_return_layout(inode); 3110 3111 nfs_fattr_init(fattr); 3112 3113 /* Deal with open(O_TRUNC) */ 3114 if (sattr->ia_valid & ATTR_OPEN) 3115 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 3116 3117 /* Optimization: if the end result is no change, don't RPC */ 3118 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 3119 return 0; 3120 3121 /* Search for an existing open(O_WRITE) file */ 3122 if (sattr->ia_valid & ATTR_FILE) { 3123 struct nfs_open_context *ctx; 3124 3125 ctx = nfs_file_open_context(sattr->ia_file); 3126 if (ctx) { 3127 cred = ctx->cred; 3128 state = ctx->state; 3129 } 3130 } 3131 3132 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 3133 if (IS_ERR(label)) 3134 return PTR_ERR(label); 3135 3136 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label); 3137 if (status == 0) { 3138 nfs_setattr_update_inode(inode, sattr); 3139 nfs_setsecurity(inode, fattr, label); 3140 } 3141 nfs4_label_free(label); 3142 return status; 3143 } 3144 3145 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 3146 const struct qstr *name, struct nfs_fh *fhandle, 3147 struct nfs_fattr *fattr, struct nfs4_label *label) 3148 { 3149 struct nfs_server *server = NFS_SERVER(dir); 3150 int status; 3151 struct nfs4_lookup_arg args = { 3152 .bitmask = server->attr_bitmask, 3153 .dir_fh = NFS_FH(dir), 3154 .name = name, 3155 }; 3156 struct nfs4_lookup_res res = { 3157 .server = server, 3158 .fattr = fattr, 3159 .label = label, 3160 .fh = fhandle, 3161 }; 3162 struct rpc_message msg = { 3163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 3164 .rpc_argp = &args, 3165 .rpc_resp = &res, 3166 }; 3167 3168 args.bitmask = nfs4_bitmask(server, label); 3169 3170 nfs_fattr_init(fattr); 3171 3172 dprintk("NFS call lookup %s\n", name->name); 3173 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); 3174 dprintk("NFS reply lookup: %d\n", status); 3175 return status; 3176 } 3177 3178 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 3179 { 3180 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 3181 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 3182 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 3183 fattr->nlink = 2; 3184 } 3185 3186 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 3187 struct qstr *name, struct nfs_fh *fhandle, 3188 struct nfs_fattr *fattr, struct nfs4_label *label) 3189 { 3190 struct nfs4_exception exception = { }; 3191 struct rpc_clnt *client = *clnt; 3192 int err; 3193 do { 3194 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label); 3195 trace_nfs4_lookup(dir, name, err); 3196 switch (err) { 3197 case -NFS4ERR_BADNAME: 3198 err = -ENOENT; 3199 goto out; 3200 case -NFS4ERR_MOVED: 3201 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 3202 goto out; 3203 case -NFS4ERR_WRONGSEC: 3204 err = -EPERM; 3205 if (client != *clnt) 3206 goto out; 3207 client = nfs4_create_sec_client(client, dir, name); 3208 if (IS_ERR(client)) 3209 return PTR_ERR(client); 3210 3211 exception.retry = 1; 3212 break; 3213 default: 3214 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 3215 } 3216 } while (exception.retry); 3217 3218 out: 3219 if (err == 0) 3220 *clnt = client; 3221 else if (client != *clnt) 3222 rpc_shutdown_client(client); 3223 3224 return err; 3225 } 3226 3227 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, 3228 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 3229 struct nfs4_label *label) 3230 { 3231 int status; 3232 struct rpc_clnt *client = NFS_CLIENT(dir); 3233 3234 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label); 3235 if (client != NFS_CLIENT(dir)) { 3236 rpc_shutdown_client(client); 3237 nfs_fixup_secinfo_attributes(fattr); 3238 } 3239 return status; 3240 } 3241 3242 struct rpc_clnt * 3243 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name, 3244 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 3245 { 3246 struct rpc_clnt *client = NFS_CLIENT(dir); 3247 int status; 3248 3249 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL); 3250 if (status < 0) 3251 return ERR_PTR(status); 3252 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 3253 } 3254 3255 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 3256 { 3257 struct nfs_server *server = NFS_SERVER(inode); 3258 struct nfs4_accessargs args = { 3259 .fh = NFS_FH(inode), 3260 .bitmask = server->cache_consistency_bitmask, 3261 }; 3262 struct nfs4_accessres res = { 3263 .server = server, 3264 }; 3265 struct rpc_message msg = { 3266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 3267 .rpc_argp = &args, 3268 .rpc_resp = &res, 3269 .rpc_cred = entry->cred, 3270 }; 3271 int mode = entry->mask; 3272 int status = 0; 3273 3274 /* 3275 * Determine which access bits we want to ask for... 3276 */ 3277 if (mode & MAY_READ) 3278 args.access |= NFS4_ACCESS_READ; 3279 if (S_ISDIR(inode->i_mode)) { 3280 if (mode & MAY_WRITE) 3281 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; 3282 if (mode & MAY_EXEC) 3283 args.access |= NFS4_ACCESS_LOOKUP; 3284 } else { 3285 if (mode & MAY_WRITE) 3286 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; 3287 if (mode & MAY_EXEC) 3288 args.access |= NFS4_ACCESS_EXECUTE; 3289 } 3290 3291 res.fattr = nfs_alloc_fattr(); 3292 if (res.fattr == NULL) 3293 return -ENOMEM; 3294 3295 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3296 if (!status) { 3297 nfs_access_set_mask(entry, res.access); 3298 nfs_refresh_inode(inode, res.fattr); 3299 } 3300 nfs_free_fattr(res.fattr); 3301 return status; 3302 } 3303 3304 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 3305 { 3306 struct nfs4_exception exception = { }; 3307 int err; 3308 do { 3309 err = _nfs4_proc_access(inode, entry); 3310 trace_nfs4_access(inode, err); 3311 err = nfs4_handle_exception(NFS_SERVER(inode), err, 3312 &exception); 3313 } while (exception.retry); 3314 return err; 3315 } 3316 3317 /* 3318 * TODO: For the time being, we don't try to get any attributes 3319 * along with any of the zero-copy operations READ, READDIR, 3320 * READLINK, WRITE. 3321 * 3322 * In the case of the first three, we want to put the GETATTR 3323 * after the read-type operation -- this is because it is hard 3324 * to predict the length of a GETATTR response in v4, and thus 3325 * align the READ data correctly. This means that the GETATTR 3326 * may end up partially falling into the page cache, and we should 3327 * shift it into the 'tail' of the xdr_buf before processing. 3328 * To do this efficiently, we need to know the total length 3329 * of data received, which doesn't seem to be available outside 3330 * of the RPC layer. 3331 * 3332 * In the case of WRITE, we also want to put the GETATTR after 3333 * the operation -- in this case because we want to make sure 3334 * we get the post-operation mtime and size. 3335 * 3336 * Both of these changes to the XDR layer would in fact be quite 3337 * minor, but I decided to leave them for a subsequent patch. 3338 */ 3339 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 3340 unsigned int pgbase, unsigned int pglen) 3341 { 3342 struct nfs4_readlink args = { 3343 .fh = NFS_FH(inode), 3344 .pgbase = pgbase, 3345 .pglen = pglen, 3346 .pages = &page, 3347 }; 3348 struct nfs4_readlink_res res; 3349 struct rpc_message msg = { 3350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 3351 .rpc_argp = &args, 3352 .rpc_resp = &res, 3353 }; 3354 3355 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 3356 } 3357 3358 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 3359 unsigned int pgbase, unsigned int pglen) 3360 { 3361 struct nfs4_exception exception = { }; 3362 int err; 3363 do { 3364 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 3365 trace_nfs4_readlink(inode, err); 3366 err = nfs4_handle_exception(NFS_SERVER(inode), err, 3367 &exception); 3368 } while (exception.retry); 3369 return err; 3370 } 3371 3372 /* 3373 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 3374 */ 3375 static int 3376 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 3377 int flags) 3378 { 3379 struct nfs4_label l, *ilabel = NULL; 3380 struct nfs_open_context *ctx; 3381 struct nfs4_state *state; 3382 int opened = 0; 3383 int status = 0; 3384 3385 ctx = alloc_nfs_open_context(dentry, FMODE_READ); 3386 if (IS_ERR(ctx)) 3387 return PTR_ERR(ctx); 3388 3389 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 3390 3391 sattr->ia_mode &= ~current_umask(); 3392 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened); 3393 if (IS_ERR(state)) { 3394 status = PTR_ERR(state); 3395 goto out; 3396 } 3397 out: 3398 nfs4_label_release_security(ilabel); 3399 put_nfs_open_context(ctx); 3400 return status; 3401 } 3402 3403 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) 3404 { 3405 struct nfs_server *server = NFS_SERVER(dir); 3406 struct nfs_removeargs args = { 3407 .fh = NFS_FH(dir), 3408 .name = *name, 3409 }; 3410 struct nfs_removeres res = { 3411 .server = server, 3412 }; 3413 struct rpc_message msg = { 3414 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 3415 .rpc_argp = &args, 3416 .rpc_resp = &res, 3417 }; 3418 int status; 3419 3420 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 3421 if (status == 0) 3422 update_changeattr(dir, &res.cinfo); 3423 return status; 3424 } 3425 3426 static int nfs4_proc_remove(struct inode *dir, struct qstr *name) 3427 { 3428 struct nfs4_exception exception = { }; 3429 int err; 3430 do { 3431 err = _nfs4_proc_remove(dir, name); 3432 trace_nfs4_remove(dir, name, err); 3433 err = nfs4_handle_exception(NFS_SERVER(dir), err, 3434 &exception); 3435 } while (exception.retry); 3436 return err; 3437 } 3438 3439 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 3440 { 3441 struct nfs_server *server = NFS_SERVER(dir); 3442 struct nfs_removeargs *args = msg->rpc_argp; 3443 struct nfs_removeres *res = msg->rpc_resp; 3444 3445 res->server = server; 3446 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 3447 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1); 3448 3449 nfs_fattr_init(res->dir_attr); 3450 } 3451 3452 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 3453 { 3454 nfs4_setup_sequence(NFS_SERVER(data->dir), 3455 &data->args.seq_args, 3456 &data->res.seq_res, 3457 task); 3458 } 3459 3460 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 3461 { 3462 struct nfs_unlinkdata *data = task->tk_calldata; 3463 struct nfs_removeres *res = &data->res; 3464 3465 if (!nfs4_sequence_done(task, &res->seq_res)) 3466 return 0; 3467 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) 3468 return 0; 3469 update_changeattr(dir, &res->cinfo); 3470 return 1; 3471 } 3472 3473 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir) 3474 { 3475 struct nfs_server *server = NFS_SERVER(dir); 3476 struct nfs_renameargs *arg = msg->rpc_argp; 3477 struct nfs_renameres *res = msg->rpc_resp; 3478 3479 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 3480 res->server = server; 3481 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1); 3482 } 3483 3484 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 3485 { 3486 nfs4_setup_sequence(NFS_SERVER(data->old_dir), 3487 &data->args.seq_args, 3488 &data->res.seq_res, 3489 task); 3490 } 3491 3492 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 3493 struct inode *new_dir) 3494 { 3495 struct nfs_renamedata *data = task->tk_calldata; 3496 struct nfs_renameres *res = &data->res; 3497 3498 if (!nfs4_sequence_done(task, &res->seq_res)) 3499 return 0; 3500 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) 3501 return 0; 3502 3503 update_changeattr(old_dir, &res->old_cinfo); 3504 update_changeattr(new_dir, &res->new_cinfo); 3505 return 1; 3506 } 3507 3508 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, 3509 struct inode *new_dir, struct qstr *new_name) 3510 { 3511 struct nfs_server *server = NFS_SERVER(old_dir); 3512 struct nfs_renameargs arg = { 3513 .old_dir = NFS_FH(old_dir), 3514 .new_dir = NFS_FH(new_dir), 3515 .old_name = old_name, 3516 .new_name = new_name, 3517 }; 3518 struct nfs_renameres res = { 3519 .server = server, 3520 }; 3521 struct rpc_message msg = { 3522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME], 3523 .rpc_argp = &arg, 3524 .rpc_resp = &res, 3525 }; 3526 int status = -ENOMEM; 3527 3528 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 3529 if (!status) { 3530 update_changeattr(old_dir, &res.old_cinfo); 3531 update_changeattr(new_dir, &res.new_cinfo); 3532 } 3533 return status; 3534 } 3535 3536 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name, 3537 struct inode *new_dir, struct qstr *new_name) 3538 { 3539 struct nfs4_exception exception = { }; 3540 int err; 3541 do { 3542 err = _nfs4_proc_rename(old_dir, old_name, 3543 new_dir, new_name); 3544 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err); 3545 err = nfs4_handle_exception(NFS_SERVER(old_dir), err, 3546 &exception); 3547 } while (exception.retry); 3548 return err; 3549 } 3550 3551 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 3552 { 3553 struct nfs_server *server = NFS_SERVER(inode); 3554 struct nfs4_link_arg arg = { 3555 .fh = NFS_FH(inode), 3556 .dir_fh = NFS_FH(dir), 3557 .name = name, 3558 .bitmask = server->attr_bitmask, 3559 }; 3560 struct nfs4_link_res res = { 3561 .server = server, 3562 .label = NULL, 3563 }; 3564 struct rpc_message msg = { 3565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 3566 .rpc_argp = &arg, 3567 .rpc_resp = &res, 3568 }; 3569 int status = -ENOMEM; 3570 3571 res.fattr = nfs_alloc_fattr(); 3572 if (res.fattr == NULL) 3573 goto out; 3574 3575 res.label = nfs4_label_alloc(server, GFP_KERNEL); 3576 if (IS_ERR(res.label)) { 3577 status = PTR_ERR(res.label); 3578 goto out; 3579 } 3580 arg.bitmask = nfs4_bitmask(server, res.label); 3581 3582 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 3583 if (!status) { 3584 update_changeattr(dir, &res.cinfo); 3585 status = nfs_post_op_update_inode(inode, res.fattr); 3586 if (!status) 3587 nfs_setsecurity(inode, res.fattr, res.label); 3588 } 3589 3590 3591 nfs4_label_free(res.label); 3592 3593 out: 3594 nfs_free_fattr(res.fattr); 3595 return status; 3596 } 3597 3598 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 3599 { 3600 struct nfs4_exception exception = { }; 3601 int err; 3602 do { 3603 err = nfs4_handle_exception(NFS_SERVER(inode), 3604 _nfs4_proc_link(inode, dir, name), 3605 &exception); 3606 } while (exception.retry); 3607 return err; 3608 } 3609 3610 struct nfs4_createdata { 3611 struct rpc_message msg; 3612 struct nfs4_create_arg arg; 3613 struct nfs4_create_res res; 3614 struct nfs_fh fh; 3615 struct nfs_fattr fattr; 3616 struct nfs4_label *label; 3617 }; 3618 3619 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 3620 struct qstr *name, struct iattr *sattr, u32 ftype) 3621 { 3622 struct nfs4_createdata *data; 3623 3624 data = kzalloc(sizeof(*data), GFP_KERNEL); 3625 if (data != NULL) { 3626 struct nfs_server *server = NFS_SERVER(dir); 3627 3628 data->label = nfs4_label_alloc(server, GFP_KERNEL); 3629 if (IS_ERR(data->label)) 3630 goto out_free; 3631 3632 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 3633 data->msg.rpc_argp = &data->arg; 3634 data->msg.rpc_resp = &data->res; 3635 data->arg.dir_fh = NFS_FH(dir); 3636 data->arg.server = server; 3637 data->arg.name = name; 3638 data->arg.attrs = sattr; 3639 data->arg.ftype = ftype; 3640 data->arg.bitmask = nfs4_bitmask(server, data->label); 3641 data->res.server = server; 3642 data->res.fh = &data->fh; 3643 data->res.fattr = &data->fattr; 3644 data->res.label = data->label; 3645 nfs_fattr_init(data->res.fattr); 3646 } 3647 return data; 3648 out_free: 3649 kfree(data); 3650 return NULL; 3651 } 3652 3653 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 3654 { 3655 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 3656 &data->arg.seq_args, &data->res.seq_res, 1); 3657 if (status == 0) { 3658 update_changeattr(dir, &data->res.dir_cinfo); 3659 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); 3660 } 3661 return status; 3662 } 3663 3664 static void nfs4_free_createdata(struct nfs4_createdata *data) 3665 { 3666 nfs4_label_free(data->label); 3667 kfree(data); 3668 } 3669 3670 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 3671 struct page *page, unsigned int len, struct iattr *sattr, 3672 struct nfs4_label *label) 3673 { 3674 struct nfs4_createdata *data; 3675 int status = -ENAMETOOLONG; 3676 3677 if (len > NFS4_MAXPATHLEN) 3678 goto out; 3679 3680 status = -ENOMEM; 3681 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 3682 if (data == NULL) 3683 goto out; 3684 3685 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 3686 data->arg.u.symlink.pages = &page; 3687 data->arg.u.symlink.len = len; 3688 data->arg.label = label; 3689 3690 status = nfs4_do_create(dir, dentry, data); 3691 3692 nfs4_free_createdata(data); 3693 out: 3694 return status; 3695 } 3696 3697 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 3698 struct page *page, unsigned int len, struct iattr *sattr) 3699 { 3700 struct nfs4_exception exception = { }; 3701 struct nfs4_label l, *label = NULL; 3702 int err; 3703 3704 label = nfs4_label_init_security(dir, dentry, sattr, &l); 3705 3706 do { 3707 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 3708 trace_nfs4_symlink(dir, &dentry->d_name, err); 3709 err = nfs4_handle_exception(NFS_SERVER(dir), err, 3710 &exception); 3711 } while (exception.retry); 3712 3713 nfs4_label_release_security(label); 3714 return err; 3715 } 3716 3717 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 3718 struct iattr *sattr, struct nfs4_label *label) 3719 { 3720 struct nfs4_createdata *data; 3721 int status = -ENOMEM; 3722 3723 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 3724 if (data == NULL) 3725 goto out; 3726 3727 data->arg.label = label; 3728 status = nfs4_do_create(dir, dentry, data); 3729 3730 nfs4_free_createdata(data); 3731 out: 3732 return status; 3733 } 3734 3735 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 3736 struct iattr *sattr) 3737 { 3738 struct nfs4_exception exception = { }; 3739 struct nfs4_label l, *label = NULL; 3740 int err; 3741 3742 label = nfs4_label_init_security(dir, dentry, sattr, &l); 3743 3744 sattr->ia_mode &= ~current_umask(); 3745 do { 3746 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 3747 trace_nfs4_mkdir(dir, &dentry->d_name, err); 3748 err = nfs4_handle_exception(NFS_SERVER(dir), err, 3749 &exception); 3750 } while (exception.retry); 3751 nfs4_label_release_security(label); 3752 3753 return err; 3754 } 3755 3756 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 3757 u64 cookie, struct page **pages, unsigned int count, int plus) 3758 { 3759 struct inode *dir = dentry->d_inode; 3760 struct nfs4_readdir_arg args = { 3761 .fh = NFS_FH(dir), 3762 .pages = pages, 3763 .pgbase = 0, 3764 .count = count, 3765 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, 3766 .plus = plus, 3767 }; 3768 struct nfs4_readdir_res res; 3769 struct rpc_message msg = { 3770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 3771 .rpc_argp = &args, 3772 .rpc_resp = &res, 3773 .rpc_cred = cred, 3774 }; 3775 int status; 3776 3777 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__, 3778 dentry, 3779 (unsigned long long)cookie); 3780 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); 3781 res.pgbase = args.pgbase; 3782 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); 3783 if (status >= 0) { 3784 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); 3785 status += args.pgbase; 3786 } 3787 3788 nfs_invalidate_atime(dir); 3789 3790 dprintk("%s: returns %d\n", __func__, status); 3791 return status; 3792 } 3793 3794 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 3795 u64 cookie, struct page **pages, unsigned int count, int plus) 3796 { 3797 struct nfs4_exception exception = { }; 3798 int err; 3799 do { 3800 err = _nfs4_proc_readdir(dentry, cred, cookie, 3801 pages, count, plus); 3802 trace_nfs4_readdir(dentry->d_inode, err); 3803 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err, 3804 &exception); 3805 } while (exception.retry); 3806 return err; 3807 } 3808 3809 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 3810 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 3811 { 3812 struct nfs4_createdata *data; 3813 int mode = sattr->ia_mode; 3814 int status = -ENOMEM; 3815 3816 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 3817 if (data == NULL) 3818 goto out; 3819 3820 if (S_ISFIFO(mode)) 3821 data->arg.ftype = NF4FIFO; 3822 else if (S_ISBLK(mode)) { 3823 data->arg.ftype = NF4BLK; 3824 data->arg.u.device.specdata1 = MAJOR(rdev); 3825 data->arg.u.device.specdata2 = MINOR(rdev); 3826 } 3827 else if (S_ISCHR(mode)) { 3828 data->arg.ftype = NF4CHR; 3829 data->arg.u.device.specdata1 = MAJOR(rdev); 3830 data->arg.u.device.specdata2 = MINOR(rdev); 3831 } else if (!S_ISSOCK(mode)) { 3832 status = -EINVAL; 3833 goto out_free; 3834 } 3835 3836 data->arg.label = label; 3837 status = nfs4_do_create(dir, dentry, data); 3838 out_free: 3839 nfs4_free_createdata(data); 3840 out: 3841 return status; 3842 } 3843 3844 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 3845 struct iattr *sattr, dev_t rdev) 3846 { 3847 struct nfs4_exception exception = { }; 3848 struct nfs4_label l, *label = NULL; 3849 int err; 3850 3851 label = nfs4_label_init_security(dir, dentry, sattr, &l); 3852 3853 sattr->ia_mode &= ~current_umask(); 3854 do { 3855 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 3856 trace_nfs4_mknod(dir, &dentry->d_name, err); 3857 err = nfs4_handle_exception(NFS_SERVER(dir), err, 3858 &exception); 3859 } while (exception.retry); 3860 3861 nfs4_label_release_security(label); 3862 3863 return err; 3864 } 3865 3866 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 3867 struct nfs_fsstat *fsstat) 3868 { 3869 struct nfs4_statfs_arg args = { 3870 .fh = fhandle, 3871 .bitmask = server->attr_bitmask, 3872 }; 3873 struct nfs4_statfs_res res = { 3874 .fsstat = fsstat, 3875 }; 3876 struct rpc_message msg = { 3877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 3878 .rpc_argp = &args, 3879 .rpc_resp = &res, 3880 }; 3881 3882 nfs_fattr_init(fsstat->fattr); 3883 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3884 } 3885 3886 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 3887 { 3888 struct nfs4_exception exception = { }; 3889 int err; 3890 do { 3891 err = nfs4_handle_exception(server, 3892 _nfs4_proc_statfs(server, fhandle, fsstat), 3893 &exception); 3894 } while (exception.retry); 3895 return err; 3896 } 3897 3898 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 3899 struct nfs_fsinfo *fsinfo) 3900 { 3901 struct nfs4_fsinfo_arg args = { 3902 .fh = fhandle, 3903 .bitmask = server->attr_bitmask, 3904 }; 3905 struct nfs4_fsinfo_res res = { 3906 .fsinfo = fsinfo, 3907 }; 3908 struct rpc_message msg = { 3909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 3910 .rpc_argp = &args, 3911 .rpc_resp = &res, 3912 }; 3913 3914 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3915 } 3916 3917 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 3918 { 3919 struct nfs4_exception exception = { }; 3920 unsigned long now = jiffies; 3921 int err; 3922 3923 do { 3924 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 3925 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 3926 if (err == 0) { 3927 struct nfs_client *clp = server->nfs_client; 3928 3929 spin_lock(&clp->cl_lock); 3930 clp->cl_lease_time = fsinfo->lease_time * HZ; 3931 clp->cl_last_renewal = now; 3932 spin_unlock(&clp->cl_lock); 3933 break; 3934 } 3935 err = nfs4_handle_exception(server, err, &exception); 3936 } while (exception.retry); 3937 return err; 3938 } 3939 3940 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 3941 { 3942 int error; 3943 3944 nfs_fattr_init(fsinfo->fattr); 3945 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 3946 if (error == 0) { 3947 /* block layout checks this! */ 3948 server->pnfs_blksize = fsinfo->blksize; 3949 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype); 3950 } 3951 3952 return error; 3953 } 3954 3955 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 3956 struct nfs_pathconf *pathconf) 3957 { 3958 struct nfs4_pathconf_arg args = { 3959 .fh = fhandle, 3960 .bitmask = server->attr_bitmask, 3961 }; 3962 struct nfs4_pathconf_res res = { 3963 .pathconf = pathconf, 3964 }; 3965 struct rpc_message msg = { 3966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 3967 .rpc_argp = &args, 3968 .rpc_resp = &res, 3969 }; 3970 3971 /* None of the pathconf attributes are mandatory to implement */ 3972 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 3973 memset(pathconf, 0, sizeof(*pathconf)); 3974 return 0; 3975 } 3976 3977 nfs_fattr_init(pathconf->fattr); 3978 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3979 } 3980 3981 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 3982 struct nfs_pathconf *pathconf) 3983 { 3984 struct nfs4_exception exception = { }; 3985 int err; 3986 3987 do { 3988 err = nfs4_handle_exception(server, 3989 _nfs4_proc_pathconf(server, fhandle, pathconf), 3990 &exception); 3991 } while (exception.retry); 3992 return err; 3993 } 3994 3995 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 3996 const struct nfs_open_context *ctx, 3997 const struct nfs_lock_context *l_ctx, 3998 fmode_t fmode) 3999 { 4000 const struct nfs_lockowner *lockowner = NULL; 4001 4002 if (l_ctx != NULL) 4003 lockowner = &l_ctx->lockowner; 4004 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner); 4005 } 4006 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 4007 4008 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 4009 const struct nfs_open_context *ctx, 4010 const struct nfs_lock_context *l_ctx, 4011 fmode_t fmode) 4012 { 4013 nfs4_stateid current_stateid; 4014 4015 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode)) 4016 return false; 4017 return nfs4_stateid_match(stateid, ¤t_stateid); 4018 } 4019 4020 static bool nfs4_error_stateid_expired(int err) 4021 { 4022 switch (err) { 4023 case -NFS4ERR_DELEG_REVOKED: 4024 case -NFS4ERR_ADMIN_REVOKED: 4025 case -NFS4ERR_BAD_STATEID: 4026 case -NFS4ERR_STALE_STATEID: 4027 case -NFS4ERR_OLD_STATEID: 4028 case -NFS4ERR_OPENMODE: 4029 case -NFS4ERR_EXPIRED: 4030 return true; 4031 } 4032 return false; 4033 } 4034 4035 void __nfs4_read_done_cb(struct nfs_read_data *data) 4036 { 4037 nfs_invalidate_atime(data->header->inode); 4038 } 4039 4040 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data) 4041 { 4042 struct nfs_server *server = NFS_SERVER(data->header->inode); 4043 4044 trace_nfs4_read(data, task->tk_status); 4045 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { 4046 rpc_restart_call_prepare(task); 4047 return -EAGAIN; 4048 } 4049 4050 __nfs4_read_done_cb(data); 4051 if (task->tk_status > 0) 4052 renew_lease(server, data->timestamp); 4053 return 0; 4054 } 4055 4056 static bool nfs4_read_stateid_changed(struct rpc_task *task, 4057 struct nfs_readargs *args) 4058 { 4059 4060 if (!nfs4_error_stateid_expired(task->tk_status) || 4061 nfs4_stateid_is_current(&args->stateid, 4062 args->context, 4063 args->lock_context, 4064 FMODE_READ)) 4065 return false; 4066 rpc_restart_call_prepare(task); 4067 return true; 4068 } 4069 4070 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data) 4071 { 4072 4073 dprintk("--> %s\n", __func__); 4074 4075 if (!nfs4_sequence_done(task, &data->res.seq_res)) 4076 return -EAGAIN; 4077 if (nfs4_read_stateid_changed(task, &data->args)) 4078 return -EAGAIN; 4079 return data->read_done_cb ? data->read_done_cb(task, data) : 4080 nfs4_read_done_cb(task, data); 4081 } 4082 4083 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg) 4084 { 4085 data->timestamp = jiffies; 4086 data->read_done_cb = nfs4_read_done_cb; 4087 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 4088 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 4089 } 4090 4091 static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data) 4092 { 4093 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode), 4094 &data->args.seq_args, 4095 &data->res.seq_res, 4096 task)) 4097 return 0; 4098 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context, 4099 data->args.lock_context, FMODE_READ) == -EIO) 4100 return -EIO; 4101 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags))) 4102 return -EIO; 4103 return 0; 4104 } 4105 4106 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data) 4107 { 4108 struct inode *inode = data->header->inode; 4109 4110 trace_nfs4_write(data, task->tk_status); 4111 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { 4112 rpc_restart_call_prepare(task); 4113 return -EAGAIN; 4114 } 4115 if (task->tk_status >= 0) { 4116 renew_lease(NFS_SERVER(inode), data->timestamp); 4117 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 4118 } 4119 return 0; 4120 } 4121 4122 static bool nfs4_write_stateid_changed(struct rpc_task *task, 4123 struct nfs_writeargs *args) 4124 { 4125 4126 if (!nfs4_error_stateid_expired(task->tk_status) || 4127 nfs4_stateid_is_current(&args->stateid, 4128 args->context, 4129 args->lock_context, 4130 FMODE_WRITE)) 4131 return false; 4132 rpc_restart_call_prepare(task); 4133 return true; 4134 } 4135 4136 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data) 4137 { 4138 if (!nfs4_sequence_done(task, &data->res.seq_res)) 4139 return -EAGAIN; 4140 if (nfs4_write_stateid_changed(task, &data->args)) 4141 return -EAGAIN; 4142 return data->write_done_cb ? data->write_done_cb(task, data) : 4143 nfs4_write_done_cb(task, data); 4144 } 4145 4146 static 4147 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data) 4148 { 4149 const struct nfs_pgio_header *hdr = data->header; 4150 4151 /* Don't request attributes for pNFS or O_DIRECT writes */ 4152 if (data->ds_clp != NULL || hdr->dreq != NULL) 4153 return false; 4154 /* Otherwise, request attributes if and only if we don't hold 4155 * a delegation 4156 */ 4157 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 4158 } 4159 4160 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg) 4161 { 4162 struct nfs_server *server = NFS_SERVER(data->header->inode); 4163 4164 if (!nfs4_write_need_cache_consistency_data(data)) { 4165 data->args.bitmask = NULL; 4166 data->res.fattr = NULL; 4167 } else 4168 data->args.bitmask = server->cache_consistency_bitmask; 4169 4170 if (!data->write_done_cb) 4171 data->write_done_cb = nfs4_write_done_cb; 4172 data->res.server = server; 4173 data->timestamp = jiffies; 4174 4175 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 4176 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 4177 } 4178 4179 static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data) 4180 { 4181 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode), 4182 &data->args.seq_args, 4183 &data->res.seq_res, 4184 task)) 4185 return 0; 4186 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context, 4187 data->args.lock_context, FMODE_WRITE) == -EIO) 4188 return -EIO; 4189 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags))) 4190 return -EIO; 4191 return 0; 4192 } 4193 4194 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 4195 { 4196 nfs4_setup_sequence(NFS_SERVER(data->inode), 4197 &data->args.seq_args, 4198 &data->res.seq_res, 4199 task); 4200 } 4201 4202 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 4203 { 4204 struct inode *inode = data->inode; 4205 4206 trace_nfs4_commit(data, task->tk_status); 4207 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { 4208 rpc_restart_call_prepare(task); 4209 return -EAGAIN; 4210 } 4211 return 0; 4212 } 4213 4214 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 4215 { 4216 if (!nfs4_sequence_done(task, &data->res.seq_res)) 4217 return -EAGAIN; 4218 return data->commit_done_cb(task, data); 4219 } 4220 4221 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) 4222 { 4223 struct nfs_server *server = NFS_SERVER(data->inode); 4224 4225 if (data->commit_done_cb == NULL) 4226 data->commit_done_cb = nfs4_commit_done_cb; 4227 data->res.server = server; 4228 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 4229 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 4230 } 4231 4232 struct nfs4_renewdata { 4233 struct nfs_client *client; 4234 unsigned long timestamp; 4235 }; 4236 4237 /* 4238 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 4239 * standalone procedure for queueing an asynchronous RENEW. 4240 */ 4241 static void nfs4_renew_release(void *calldata) 4242 { 4243 struct nfs4_renewdata *data = calldata; 4244 struct nfs_client *clp = data->client; 4245 4246 if (atomic_read(&clp->cl_count) > 1) 4247 nfs4_schedule_state_renewal(clp); 4248 nfs_put_client(clp); 4249 kfree(data); 4250 } 4251 4252 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 4253 { 4254 struct nfs4_renewdata *data = calldata; 4255 struct nfs_client *clp = data->client; 4256 unsigned long timestamp = data->timestamp; 4257 4258 trace_nfs4_renew_async(clp, task->tk_status); 4259 switch (task->tk_status) { 4260 case 0: 4261 break; 4262 case -NFS4ERR_LEASE_MOVED: 4263 nfs4_schedule_lease_moved_recovery(clp); 4264 break; 4265 default: 4266 /* Unless we're shutting down, schedule state recovery! */ 4267 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 4268 return; 4269 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 4270 nfs4_schedule_lease_recovery(clp); 4271 return; 4272 } 4273 nfs4_schedule_path_down_recovery(clp); 4274 } 4275 do_renew_lease(clp, timestamp); 4276 } 4277 4278 static const struct rpc_call_ops nfs4_renew_ops = { 4279 .rpc_call_done = nfs4_renew_done, 4280 .rpc_release = nfs4_renew_release, 4281 }; 4282 4283 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) 4284 { 4285 struct rpc_message msg = { 4286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 4287 .rpc_argp = clp, 4288 .rpc_cred = cred, 4289 }; 4290 struct nfs4_renewdata *data; 4291 4292 if (renew_flags == 0) 4293 return 0; 4294 if (!atomic_inc_not_zero(&clp->cl_count)) 4295 return -EIO; 4296 data = kmalloc(sizeof(*data), GFP_NOFS); 4297 if (data == NULL) 4298 return -ENOMEM; 4299 data->client = clp; 4300 data->timestamp = jiffies; 4301 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 4302 &nfs4_renew_ops, data); 4303 } 4304 4305 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) 4306 { 4307 struct rpc_message msg = { 4308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 4309 .rpc_argp = clp, 4310 .rpc_cred = cred, 4311 }; 4312 unsigned long now = jiffies; 4313 int status; 4314 4315 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 4316 if (status < 0) 4317 return status; 4318 do_renew_lease(clp, now); 4319 return 0; 4320 } 4321 4322 static inline int nfs4_server_supports_acls(struct nfs_server *server) 4323 { 4324 return (server->caps & NFS_CAP_ACLS) 4325 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 4326 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL); 4327 } 4328 4329 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 4330 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 4331 * the stack. 4332 */ 4333 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 4334 4335 static int buf_to_pages_noslab(const void *buf, size_t buflen, 4336 struct page **pages, unsigned int *pgbase) 4337 { 4338 struct page *newpage, **spages; 4339 int rc = 0; 4340 size_t len; 4341 spages = pages; 4342 4343 do { 4344 len = min_t(size_t, PAGE_SIZE, buflen); 4345 newpage = alloc_page(GFP_KERNEL); 4346 4347 if (newpage == NULL) 4348 goto unwind; 4349 memcpy(page_address(newpage), buf, len); 4350 buf += len; 4351 buflen -= len; 4352 *pages++ = newpage; 4353 rc++; 4354 } while (buflen != 0); 4355 4356 return rc; 4357 4358 unwind: 4359 for(; rc > 0; rc--) 4360 __free_page(spages[rc-1]); 4361 return -ENOMEM; 4362 } 4363 4364 struct nfs4_cached_acl { 4365 int cached; 4366 size_t len; 4367 char data[0]; 4368 }; 4369 4370 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 4371 { 4372 struct nfs_inode *nfsi = NFS_I(inode); 4373 4374 spin_lock(&inode->i_lock); 4375 kfree(nfsi->nfs4_acl); 4376 nfsi->nfs4_acl = acl; 4377 spin_unlock(&inode->i_lock); 4378 } 4379 4380 static void nfs4_zap_acl_attr(struct inode *inode) 4381 { 4382 nfs4_set_cached_acl(inode, NULL); 4383 } 4384 4385 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 4386 { 4387 struct nfs_inode *nfsi = NFS_I(inode); 4388 struct nfs4_cached_acl *acl; 4389 int ret = -ENOENT; 4390 4391 spin_lock(&inode->i_lock); 4392 acl = nfsi->nfs4_acl; 4393 if (acl == NULL) 4394 goto out; 4395 if (buf == NULL) /* user is just asking for length */ 4396 goto out_len; 4397 if (acl->cached == 0) 4398 goto out; 4399 ret = -ERANGE; /* see getxattr(2) man page */ 4400 if (acl->len > buflen) 4401 goto out; 4402 memcpy(buf, acl->data, acl->len); 4403 out_len: 4404 ret = acl->len; 4405 out: 4406 spin_unlock(&inode->i_lock); 4407 return ret; 4408 } 4409 4410 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 4411 { 4412 struct nfs4_cached_acl *acl; 4413 size_t buflen = sizeof(*acl) + acl_len; 4414 4415 if (buflen <= PAGE_SIZE) { 4416 acl = kmalloc(buflen, GFP_KERNEL); 4417 if (acl == NULL) 4418 goto out; 4419 acl->cached = 1; 4420 _copy_from_pages(acl->data, pages, pgbase, acl_len); 4421 } else { 4422 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 4423 if (acl == NULL) 4424 goto out; 4425 acl->cached = 0; 4426 } 4427 acl->len = acl_len; 4428 out: 4429 nfs4_set_cached_acl(inode, acl); 4430 } 4431 4432 /* 4433 * The getxattr API returns the required buffer length when called with a 4434 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 4435 * the required buf. On a NULL buf, we send a page of data to the server 4436 * guessing that the ACL request can be serviced by a page. If so, we cache 4437 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 4438 * the cache. If not so, we throw away the page, and cache the required 4439 * length. The next getxattr call will then produce another round trip to 4440 * the server, this time with the input buf of the required size. 4441 */ 4442 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 4443 { 4444 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, }; 4445 struct nfs_getaclargs args = { 4446 .fh = NFS_FH(inode), 4447 .acl_pages = pages, 4448 .acl_len = buflen, 4449 }; 4450 struct nfs_getaclres res = { 4451 .acl_len = buflen, 4452 }; 4453 struct rpc_message msg = { 4454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 4455 .rpc_argp = &args, 4456 .rpc_resp = &res, 4457 }; 4458 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 4459 int ret = -ENOMEM, i; 4460 4461 /* As long as we're doing a round trip to the server anyway, 4462 * let's be prepared for a page of acl data. */ 4463 if (npages == 0) 4464 npages = 1; 4465 if (npages > ARRAY_SIZE(pages)) 4466 return -ERANGE; 4467 4468 for (i = 0; i < npages; i++) { 4469 pages[i] = alloc_page(GFP_KERNEL); 4470 if (!pages[i]) 4471 goto out_free; 4472 } 4473 4474 /* for decoding across pages */ 4475 res.acl_scratch = alloc_page(GFP_KERNEL); 4476 if (!res.acl_scratch) 4477 goto out_free; 4478 4479 args.acl_len = npages * PAGE_SIZE; 4480 args.acl_pgbase = 0; 4481 4482 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 4483 __func__, buf, buflen, npages, args.acl_len); 4484 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 4485 &msg, &args.seq_args, &res.seq_res, 0); 4486 if (ret) 4487 goto out_free; 4488 4489 /* Handle the case where the passed-in buffer is too short */ 4490 if (res.acl_flags & NFS4_ACL_TRUNC) { 4491 /* Did the user only issue a request for the acl length? */ 4492 if (buf == NULL) 4493 goto out_ok; 4494 ret = -ERANGE; 4495 goto out_free; 4496 } 4497 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 4498 if (buf) { 4499 if (res.acl_len > buflen) { 4500 ret = -ERANGE; 4501 goto out_free; 4502 } 4503 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 4504 } 4505 out_ok: 4506 ret = res.acl_len; 4507 out_free: 4508 for (i = 0; i < npages; i++) 4509 if (pages[i]) 4510 __free_page(pages[i]); 4511 if (res.acl_scratch) 4512 __free_page(res.acl_scratch); 4513 return ret; 4514 } 4515 4516 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 4517 { 4518 struct nfs4_exception exception = { }; 4519 ssize_t ret; 4520 do { 4521 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 4522 trace_nfs4_get_acl(inode, ret); 4523 if (ret >= 0) 4524 break; 4525 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 4526 } while (exception.retry); 4527 return ret; 4528 } 4529 4530 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 4531 { 4532 struct nfs_server *server = NFS_SERVER(inode); 4533 int ret; 4534 4535 if (!nfs4_server_supports_acls(server)) 4536 return -EOPNOTSUPP; 4537 ret = nfs_revalidate_inode(server, inode); 4538 if (ret < 0) 4539 return ret; 4540 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 4541 nfs_zap_acl_cache(inode); 4542 ret = nfs4_read_cached_acl(inode, buf, buflen); 4543 if (ret != -ENOENT) 4544 /* -ENOENT is returned if there is no ACL or if there is an ACL 4545 * but no cached acl data, just the acl length */ 4546 return ret; 4547 return nfs4_get_acl_uncached(inode, buf, buflen); 4548 } 4549 4550 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 4551 { 4552 struct nfs_server *server = NFS_SERVER(inode); 4553 struct page *pages[NFS4ACL_MAXPAGES]; 4554 struct nfs_setaclargs arg = { 4555 .fh = NFS_FH(inode), 4556 .acl_pages = pages, 4557 .acl_len = buflen, 4558 }; 4559 struct nfs_setaclres res; 4560 struct rpc_message msg = { 4561 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 4562 .rpc_argp = &arg, 4563 .rpc_resp = &res, 4564 }; 4565 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 4566 int ret, i; 4567 4568 if (!nfs4_server_supports_acls(server)) 4569 return -EOPNOTSUPP; 4570 if (npages > ARRAY_SIZE(pages)) 4571 return -ERANGE; 4572 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase); 4573 if (i < 0) 4574 return i; 4575 nfs4_inode_return_delegation(inode); 4576 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4577 4578 /* 4579 * Free each page after tx, so the only ref left is 4580 * held by the network stack 4581 */ 4582 for (; i > 0; i--) 4583 put_page(pages[i-1]); 4584 4585 /* 4586 * Acl update can result in inode attribute update. 4587 * so mark the attribute cache invalid. 4588 */ 4589 spin_lock(&inode->i_lock); 4590 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; 4591 spin_unlock(&inode->i_lock); 4592 nfs_access_zap_cache(inode); 4593 nfs_zap_acl_cache(inode); 4594 return ret; 4595 } 4596 4597 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 4598 { 4599 struct nfs4_exception exception = { }; 4600 int err; 4601 do { 4602 err = __nfs4_proc_set_acl(inode, buf, buflen); 4603 trace_nfs4_set_acl(inode, err); 4604 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4605 &exception); 4606 } while (exception.retry); 4607 return err; 4608 } 4609 4610 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 4611 static int _nfs4_get_security_label(struct inode *inode, void *buf, 4612 size_t buflen) 4613 { 4614 struct nfs_server *server = NFS_SERVER(inode); 4615 struct nfs_fattr fattr; 4616 struct nfs4_label label = {0, 0, buflen, buf}; 4617 4618 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 4619 struct nfs4_getattr_arg arg = { 4620 .fh = NFS_FH(inode), 4621 .bitmask = bitmask, 4622 }; 4623 struct nfs4_getattr_res res = { 4624 .fattr = &fattr, 4625 .label = &label, 4626 .server = server, 4627 }; 4628 struct rpc_message msg = { 4629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4630 .rpc_argp = &arg, 4631 .rpc_resp = &res, 4632 }; 4633 int ret; 4634 4635 nfs_fattr_init(&fattr); 4636 4637 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 4638 if (ret) 4639 return ret; 4640 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 4641 return -ENOENT; 4642 if (buflen < label.len) 4643 return -ERANGE; 4644 return 0; 4645 } 4646 4647 static int nfs4_get_security_label(struct inode *inode, void *buf, 4648 size_t buflen) 4649 { 4650 struct nfs4_exception exception = { }; 4651 int err; 4652 4653 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 4654 return -EOPNOTSUPP; 4655 4656 do { 4657 err = _nfs4_get_security_label(inode, buf, buflen); 4658 trace_nfs4_get_security_label(inode, err); 4659 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4660 &exception); 4661 } while (exception.retry); 4662 return err; 4663 } 4664 4665 static int _nfs4_do_set_security_label(struct inode *inode, 4666 struct nfs4_label *ilabel, 4667 struct nfs_fattr *fattr, 4668 struct nfs4_label *olabel) 4669 { 4670 4671 struct iattr sattr = {0}; 4672 struct nfs_server *server = NFS_SERVER(inode); 4673 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 4674 struct nfs_setattrargs arg = { 4675 .fh = NFS_FH(inode), 4676 .iap = &sattr, 4677 .server = server, 4678 .bitmask = bitmask, 4679 .label = ilabel, 4680 }; 4681 struct nfs_setattrres res = { 4682 .fattr = fattr, 4683 .label = olabel, 4684 .server = server, 4685 }; 4686 struct rpc_message msg = { 4687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 4688 .rpc_argp = &arg, 4689 .rpc_resp = &res, 4690 }; 4691 int status; 4692 4693 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 4694 4695 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4696 if (status) 4697 dprintk("%s failed: %d\n", __func__, status); 4698 4699 return status; 4700 } 4701 4702 static int nfs4_do_set_security_label(struct inode *inode, 4703 struct nfs4_label *ilabel, 4704 struct nfs_fattr *fattr, 4705 struct nfs4_label *olabel) 4706 { 4707 struct nfs4_exception exception = { }; 4708 int err; 4709 4710 do { 4711 err = _nfs4_do_set_security_label(inode, ilabel, 4712 fattr, olabel); 4713 trace_nfs4_set_security_label(inode, err); 4714 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4715 &exception); 4716 } while (exception.retry); 4717 return err; 4718 } 4719 4720 static int 4721 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen) 4722 { 4723 struct nfs4_label ilabel, *olabel = NULL; 4724 struct nfs_fattr fattr; 4725 struct rpc_cred *cred; 4726 struct inode *inode = dentry->d_inode; 4727 int status; 4728 4729 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 4730 return -EOPNOTSUPP; 4731 4732 nfs_fattr_init(&fattr); 4733 4734 ilabel.pi = 0; 4735 ilabel.lfs = 0; 4736 ilabel.label = (char *)buf; 4737 ilabel.len = buflen; 4738 4739 cred = rpc_lookup_cred(); 4740 if (IS_ERR(cred)) 4741 return PTR_ERR(cred); 4742 4743 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 4744 if (IS_ERR(olabel)) { 4745 status = -PTR_ERR(olabel); 4746 goto out; 4747 } 4748 4749 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); 4750 if (status == 0) 4751 nfs_setsecurity(inode, &fattr, olabel); 4752 4753 nfs4_label_free(olabel); 4754 out: 4755 put_rpccred(cred); 4756 return status; 4757 } 4758 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 4759 4760 4761 static int 4762 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) 4763 { 4764 struct nfs_client *clp = server->nfs_client; 4765 4766 if (task->tk_status >= 0) 4767 return 0; 4768 switch(task->tk_status) { 4769 case -NFS4ERR_DELEG_REVOKED: 4770 case -NFS4ERR_ADMIN_REVOKED: 4771 case -NFS4ERR_BAD_STATEID: 4772 if (state == NULL) 4773 break; 4774 nfs_remove_bad_delegation(state->inode); 4775 case -NFS4ERR_OPENMODE: 4776 if (state == NULL) 4777 break; 4778 if (nfs4_schedule_stateid_recovery(server, state) < 0) 4779 goto recovery_failed; 4780 goto wait_on_recovery; 4781 case -NFS4ERR_EXPIRED: 4782 if (state != NULL) { 4783 if (nfs4_schedule_stateid_recovery(server, state) < 0) 4784 goto recovery_failed; 4785 } 4786 case -NFS4ERR_STALE_STATEID: 4787 case -NFS4ERR_STALE_CLIENTID: 4788 nfs4_schedule_lease_recovery(clp); 4789 goto wait_on_recovery; 4790 case -NFS4ERR_MOVED: 4791 if (nfs4_schedule_migration_recovery(server) < 0) 4792 goto recovery_failed; 4793 goto wait_on_recovery; 4794 case -NFS4ERR_LEASE_MOVED: 4795 nfs4_schedule_lease_moved_recovery(clp); 4796 goto wait_on_recovery; 4797 #if defined(CONFIG_NFS_V4_1) 4798 case -NFS4ERR_BADSESSION: 4799 case -NFS4ERR_BADSLOT: 4800 case -NFS4ERR_BAD_HIGH_SLOT: 4801 case -NFS4ERR_DEADSESSION: 4802 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 4803 case -NFS4ERR_SEQ_FALSE_RETRY: 4804 case -NFS4ERR_SEQ_MISORDERED: 4805 dprintk("%s ERROR %d, Reset session\n", __func__, 4806 task->tk_status); 4807 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); 4808 goto wait_on_recovery; 4809 #endif /* CONFIG_NFS_V4_1 */ 4810 case -NFS4ERR_DELAY: 4811 nfs_inc_server_stats(server, NFSIOS_DELAY); 4812 case -NFS4ERR_GRACE: 4813 rpc_delay(task, NFS4_POLL_RETRY_MAX); 4814 case -NFS4ERR_RETRY_UNCACHED_REP: 4815 case -NFS4ERR_OLD_STATEID: 4816 goto restart_call; 4817 } 4818 task->tk_status = nfs4_map_errors(task->tk_status); 4819 return 0; 4820 recovery_failed: 4821 task->tk_status = -EIO; 4822 return 0; 4823 wait_on_recovery: 4824 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 4825 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 4826 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 4827 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 4828 goto recovery_failed; 4829 restart_call: 4830 task->tk_status = 0; 4831 return -EAGAIN; 4832 } 4833 4834 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 4835 nfs4_verifier *bootverf) 4836 { 4837 __be32 verf[2]; 4838 4839 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 4840 /* An impossible timestamp guarantees this value 4841 * will never match a generated boot time. */ 4842 verf[0] = 0; 4843 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1); 4844 } else { 4845 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 4846 verf[0] = cpu_to_be32(nn->boot_time.tv_sec); 4847 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec); 4848 } 4849 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 4850 } 4851 4852 static unsigned int 4853 nfs4_init_nonuniform_client_string(const struct nfs_client *clp, 4854 char *buf, size_t len) 4855 { 4856 unsigned int result; 4857 4858 rcu_read_lock(); 4859 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s", 4860 clp->cl_ipaddr, 4861 rpc_peeraddr2str(clp->cl_rpcclient, 4862 RPC_DISPLAY_ADDR), 4863 rpc_peeraddr2str(clp->cl_rpcclient, 4864 RPC_DISPLAY_PROTO)); 4865 rcu_read_unlock(); 4866 return result; 4867 } 4868 4869 static unsigned int 4870 nfs4_init_uniform_client_string(const struct nfs_client *clp, 4871 char *buf, size_t len) 4872 { 4873 const char *nodename = clp->cl_rpcclient->cl_nodename; 4874 4875 if (nfs4_client_id_uniquifier[0] != '\0') 4876 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s", 4877 clp->rpc_ops->version, 4878 clp->cl_minorversion, 4879 nfs4_client_id_uniquifier, 4880 nodename); 4881 return scnprintf(buf, len, "Linux NFSv%u.%u %s", 4882 clp->rpc_ops->version, clp->cl_minorversion, 4883 nodename); 4884 } 4885 4886 /** 4887 * nfs4_proc_setclientid - Negotiate client ID 4888 * @clp: state data structure 4889 * @program: RPC program for NFSv4 callback service 4890 * @port: IP port number for NFS4 callback service 4891 * @cred: RPC credential to use for this call 4892 * @res: where to place the result 4893 * 4894 * Returns zero, a negative errno, or a negative NFS4ERR status code. 4895 */ 4896 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 4897 unsigned short port, struct rpc_cred *cred, 4898 struct nfs4_setclientid_res *res) 4899 { 4900 nfs4_verifier sc_verifier; 4901 struct nfs4_setclientid setclientid = { 4902 .sc_verifier = &sc_verifier, 4903 .sc_prog = program, 4904 .sc_cb_ident = clp->cl_cb_ident, 4905 }; 4906 struct rpc_message msg = { 4907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 4908 .rpc_argp = &setclientid, 4909 .rpc_resp = res, 4910 .rpc_cred = cred, 4911 }; 4912 int status; 4913 4914 /* nfs_client_id4 */ 4915 nfs4_init_boot_verifier(clp, &sc_verifier); 4916 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 4917 setclientid.sc_name_len = 4918 nfs4_init_uniform_client_string(clp, 4919 setclientid.sc_name, 4920 sizeof(setclientid.sc_name)); 4921 else 4922 setclientid.sc_name_len = 4923 nfs4_init_nonuniform_client_string(clp, 4924 setclientid.sc_name, 4925 sizeof(setclientid.sc_name)); 4926 /* cb_client4 */ 4927 rcu_read_lock(); 4928 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid, 4929 sizeof(setclientid.sc_netid), "%s", 4930 rpc_peeraddr2str(clp->cl_rpcclient, 4931 RPC_DISPLAY_NETID)); 4932 rcu_read_unlock(); 4933 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 4934 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 4935 clp->cl_ipaddr, port >> 8, port & 255); 4936 4937 dprintk("NFS call setclientid auth=%s, '%.*s'\n", 4938 clp->cl_rpcclient->cl_auth->au_ops->au_name, 4939 setclientid.sc_name_len, setclientid.sc_name); 4940 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 4941 trace_nfs4_setclientid(clp, status); 4942 dprintk("NFS reply setclientid: %d\n", status); 4943 return status; 4944 } 4945 4946 /** 4947 * nfs4_proc_setclientid_confirm - Confirm client ID 4948 * @clp: state data structure 4949 * @res: result of a previous SETCLIENTID 4950 * @cred: RPC credential to use for this call 4951 * 4952 * Returns zero, a negative errno, or a negative NFS4ERR status code. 4953 */ 4954 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 4955 struct nfs4_setclientid_res *arg, 4956 struct rpc_cred *cred) 4957 { 4958 struct rpc_message msg = { 4959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 4960 .rpc_argp = arg, 4961 .rpc_cred = cred, 4962 }; 4963 int status; 4964 4965 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 4966 clp->cl_rpcclient->cl_auth->au_ops->au_name, 4967 clp->cl_clientid); 4968 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 4969 trace_nfs4_setclientid_confirm(clp, status); 4970 dprintk("NFS reply setclientid_confirm: %d\n", status); 4971 return status; 4972 } 4973 4974 struct nfs4_delegreturndata { 4975 struct nfs4_delegreturnargs args; 4976 struct nfs4_delegreturnres res; 4977 struct nfs_fh fh; 4978 nfs4_stateid stateid; 4979 unsigned long timestamp; 4980 struct nfs_fattr fattr; 4981 int rpc_status; 4982 }; 4983 4984 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 4985 { 4986 struct nfs4_delegreturndata *data = calldata; 4987 4988 if (!nfs4_sequence_done(task, &data->res.seq_res)) 4989 return; 4990 4991 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 4992 switch (task->tk_status) { 4993 case 0: 4994 renew_lease(data->res.server, data->timestamp); 4995 break; 4996 case -NFS4ERR_ADMIN_REVOKED: 4997 case -NFS4ERR_DELEG_REVOKED: 4998 case -NFS4ERR_BAD_STATEID: 4999 case -NFS4ERR_OLD_STATEID: 5000 case -NFS4ERR_STALE_STATEID: 5001 case -NFS4ERR_EXPIRED: 5002 task->tk_status = 0; 5003 break; 5004 default: 5005 if (nfs4_async_handle_error(task, data->res.server, NULL) == 5006 -EAGAIN) { 5007 rpc_restart_call_prepare(task); 5008 return; 5009 } 5010 } 5011 data->rpc_status = task->tk_status; 5012 } 5013 5014 static void nfs4_delegreturn_release(void *calldata) 5015 { 5016 kfree(calldata); 5017 } 5018 5019 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 5020 { 5021 struct nfs4_delegreturndata *d_data; 5022 5023 d_data = (struct nfs4_delegreturndata *)data; 5024 5025 nfs4_setup_sequence(d_data->res.server, 5026 &d_data->args.seq_args, 5027 &d_data->res.seq_res, 5028 task); 5029 } 5030 5031 static const struct rpc_call_ops nfs4_delegreturn_ops = { 5032 .rpc_call_prepare = nfs4_delegreturn_prepare, 5033 .rpc_call_done = nfs4_delegreturn_done, 5034 .rpc_release = nfs4_delegreturn_release, 5035 }; 5036 5037 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 5038 { 5039 struct nfs4_delegreturndata *data; 5040 struct nfs_server *server = NFS_SERVER(inode); 5041 struct rpc_task *task; 5042 struct rpc_message msg = { 5043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 5044 .rpc_cred = cred, 5045 }; 5046 struct rpc_task_setup task_setup_data = { 5047 .rpc_client = server->client, 5048 .rpc_message = &msg, 5049 .callback_ops = &nfs4_delegreturn_ops, 5050 .flags = RPC_TASK_ASYNC, 5051 }; 5052 int status = 0; 5053 5054 data = kzalloc(sizeof(*data), GFP_NOFS); 5055 if (data == NULL) 5056 return -ENOMEM; 5057 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 5058 data->args.fhandle = &data->fh; 5059 data->args.stateid = &data->stateid; 5060 data->args.bitmask = server->cache_consistency_bitmask; 5061 nfs_copy_fh(&data->fh, NFS_FH(inode)); 5062 nfs4_stateid_copy(&data->stateid, stateid); 5063 data->res.fattr = &data->fattr; 5064 data->res.server = server; 5065 nfs_fattr_init(data->res.fattr); 5066 data->timestamp = jiffies; 5067 data->rpc_status = 0; 5068 5069 task_setup_data.callback_data = data; 5070 msg.rpc_argp = &data->args; 5071 msg.rpc_resp = &data->res; 5072 task = rpc_run_task(&task_setup_data); 5073 if (IS_ERR(task)) 5074 return PTR_ERR(task); 5075 if (!issync) 5076 goto out; 5077 status = nfs4_wait_for_completion_rpc_task(task); 5078 if (status != 0) 5079 goto out; 5080 status = data->rpc_status; 5081 if (status == 0) 5082 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 5083 else 5084 nfs_refresh_inode(inode, &data->fattr); 5085 out: 5086 rpc_put_task(task); 5087 return status; 5088 } 5089 5090 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 5091 { 5092 struct nfs_server *server = NFS_SERVER(inode); 5093 struct nfs4_exception exception = { }; 5094 int err; 5095 do { 5096 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 5097 trace_nfs4_delegreturn(inode, err); 5098 switch (err) { 5099 case -NFS4ERR_STALE_STATEID: 5100 case -NFS4ERR_EXPIRED: 5101 case 0: 5102 return 0; 5103 } 5104 err = nfs4_handle_exception(server, err, &exception); 5105 } while (exception.retry); 5106 return err; 5107 } 5108 5109 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 5110 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 5111 5112 /* 5113 * sleep, with exponential backoff, and retry the LOCK operation. 5114 */ 5115 static unsigned long 5116 nfs4_set_lock_task_retry(unsigned long timeout) 5117 { 5118 freezable_schedule_timeout_killable_unsafe(timeout); 5119 timeout <<= 1; 5120 if (timeout > NFS4_LOCK_MAXTIMEOUT) 5121 return NFS4_LOCK_MAXTIMEOUT; 5122 return timeout; 5123 } 5124 5125 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5126 { 5127 struct inode *inode = state->inode; 5128 struct nfs_server *server = NFS_SERVER(inode); 5129 struct nfs_client *clp = server->nfs_client; 5130 struct nfs_lockt_args arg = { 5131 .fh = NFS_FH(inode), 5132 .fl = request, 5133 }; 5134 struct nfs_lockt_res res = { 5135 .denied = request, 5136 }; 5137 struct rpc_message msg = { 5138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 5139 .rpc_argp = &arg, 5140 .rpc_resp = &res, 5141 .rpc_cred = state->owner->so_cred, 5142 }; 5143 struct nfs4_lock_state *lsp; 5144 int status; 5145 5146 arg.lock_owner.clientid = clp->cl_clientid; 5147 status = nfs4_set_lock_state(state, request); 5148 if (status != 0) 5149 goto out; 5150 lsp = request->fl_u.nfs4_fl.owner; 5151 arg.lock_owner.id = lsp->ls_seqid.owner_id; 5152 arg.lock_owner.s_dev = server->s_dev; 5153 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5154 switch (status) { 5155 case 0: 5156 request->fl_type = F_UNLCK; 5157 break; 5158 case -NFS4ERR_DENIED: 5159 status = 0; 5160 } 5161 request->fl_ops->fl_release_private(request); 5162 request->fl_ops = NULL; 5163 out: 5164 return status; 5165 } 5166 5167 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5168 { 5169 struct nfs4_exception exception = { }; 5170 int err; 5171 5172 do { 5173 err = _nfs4_proc_getlk(state, cmd, request); 5174 trace_nfs4_get_lock(request, state, cmd, err); 5175 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 5176 &exception); 5177 } while (exception.retry); 5178 return err; 5179 } 5180 5181 static int do_vfs_lock(struct file *file, struct file_lock *fl) 5182 { 5183 int res = 0; 5184 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { 5185 case FL_POSIX: 5186 res = posix_lock_file_wait(file, fl); 5187 break; 5188 case FL_FLOCK: 5189 res = flock_lock_file_wait(file, fl); 5190 break; 5191 default: 5192 BUG(); 5193 } 5194 return res; 5195 } 5196 5197 struct nfs4_unlockdata { 5198 struct nfs_locku_args arg; 5199 struct nfs_locku_res res; 5200 struct nfs4_lock_state *lsp; 5201 struct nfs_open_context *ctx; 5202 struct file_lock fl; 5203 const struct nfs_server *server; 5204 unsigned long timestamp; 5205 }; 5206 5207 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 5208 struct nfs_open_context *ctx, 5209 struct nfs4_lock_state *lsp, 5210 struct nfs_seqid *seqid) 5211 { 5212 struct nfs4_unlockdata *p; 5213 struct inode *inode = lsp->ls_state->inode; 5214 5215 p = kzalloc(sizeof(*p), GFP_NOFS); 5216 if (p == NULL) 5217 return NULL; 5218 p->arg.fh = NFS_FH(inode); 5219 p->arg.fl = &p->fl; 5220 p->arg.seqid = seqid; 5221 p->res.seqid = seqid; 5222 p->arg.stateid = &lsp->ls_stateid; 5223 p->lsp = lsp; 5224 atomic_inc(&lsp->ls_count); 5225 /* Ensure we don't close file until we're done freeing locks! */ 5226 p->ctx = get_nfs_open_context(ctx); 5227 memcpy(&p->fl, fl, sizeof(p->fl)); 5228 p->server = NFS_SERVER(inode); 5229 return p; 5230 } 5231 5232 static void nfs4_locku_release_calldata(void *data) 5233 { 5234 struct nfs4_unlockdata *calldata = data; 5235 nfs_free_seqid(calldata->arg.seqid); 5236 nfs4_put_lock_state(calldata->lsp); 5237 put_nfs_open_context(calldata->ctx); 5238 kfree(calldata); 5239 } 5240 5241 static void nfs4_locku_done(struct rpc_task *task, void *data) 5242 { 5243 struct nfs4_unlockdata *calldata = data; 5244 5245 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 5246 return; 5247 switch (task->tk_status) { 5248 case 0: 5249 nfs4_stateid_copy(&calldata->lsp->ls_stateid, 5250 &calldata->res.stateid); 5251 renew_lease(calldata->server, calldata->timestamp); 5252 break; 5253 case -NFS4ERR_BAD_STATEID: 5254 case -NFS4ERR_OLD_STATEID: 5255 case -NFS4ERR_STALE_STATEID: 5256 case -NFS4ERR_EXPIRED: 5257 break; 5258 default: 5259 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) 5260 rpc_restart_call_prepare(task); 5261 } 5262 nfs_release_seqid(calldata->arg.seqid); 5263 } 5264 5265 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 5266 { 5267 struct nfs4_unlockdata *calldata = data; 5268 5269 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 5270 goto out_wait; 5271 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 5272 /* Note: exit _without_ running nfs4_locku_done */ 5273 goto out_no_action; 5274 } 5275 calldata->timestamp = jiffies; 5276 if (nfs4_setup_sequence(calldata->server, 5277 &calldata->arg.seq_args, 5278 &calldata->res.seq_res, 5279 task) != 0) 5280 nfs_release_seqid(calldata->arg.seqid); 5281 return; 5282 out_no_action: 5283 task->tk_action = NULL; 5284 out_wait: 5285 nfs4_sequence_done(task, &calldata->res.seq_res); 5286 } 5287 5288 static const struct rpc_call_ops nfs4_locku_ops = { 5289 .rpc_call_prepare = nfs4_locku_prepare, 5290 .rpc_call_done = nfs4_locku_done, 5291 .rpc_release = nfs4_locku_release_calldata, 5292 }; 5293 5294 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 5295 struct nfs_open_context *ctx, 5296 struct nfs4_lock_state *lsp, 5297 struct nfs_seqid *seqid) 5298 { 5299 struct nfs4_unlockdata *data; 5300 struct rpc_message msg = { 5301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 5302 .rpc_cred = ctx->cred, 5303 }; 5304 struct rpc_task_setup task_setup_data = { 5305 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 5306 .rpc_message = &msg, 5307 .callback_ops = &nfs4_locku_ops, 5308 .workqueue = nfsiod_workqueue, 5309 .flags = RPC_TASK_ASYNC, 5310 }; 5311 5312 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 5313 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 5314 5315 /* Ensure this is an unlock - when canceling a lock, the 5316 * canceled lock is passed in, and it won't be an unlock. 5317 */ 5318 fl->fl_type = F_UNLCK; 5319 5320 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 5321 if (data == NULL) { 5322 nfs_free_seqid(seqid); 5323 return ERR_PTR(-ENOMEM); 5324 } 5325 5326 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); 5327 msg.rpc_argp = &data->arg; 5328 msg.rpc_resp = &data->res; 5329 task_setup_data.callback_data = data; 5330 return rpc_run_task(&task_setup_data); 5331 } 5332 5333 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 5334 { 5335 struct inode *inode = state->inode; 5336 struct nfs4_state_owner *sp = state->owner; 5337 struct nfs_inode *nfsi = NFS_I(inode); 5338 struct nfs_seqid *seqid; 5339 struct nfs4_lock_state *lsp; 5340 struct rpc_task *task; 5341 int status = 0; 5342 unsigned char fl_flags = request->fl_flags; 5343 5344 status = nfs4_set_lock_state(state, request); 5345 /* Unlock _before_ we do the RPC call */ 5346 request->fl_flags |= FL_EXISTS; 5347 /* Exclude nfs_delegation_claim_locks() */ 5348 mutex_lock(&sp->so_delegreturn_mutex); 5349 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 5350 down_read(&nfsi->rwsem); 5351 if (do_vfs_lock(request->fl_file, request) == -ENOENT) { 5352 up_read(&nfsi->rwsem); 5353 mutex_unlock(&sp->so_delegreturn_mutex); 5354 goto out; 5355 } 5356 up_read(&nfsi->rwsem); 5357 mutex_unlock(&sp->so_delegreturn_mutex); 5358 if (status != 0) 5359 goto out; 5360 /* Is this a delegated lock? */ 5361 lsp = request->fl_u.nfs4_fl.owner; 5362 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 5363 goto out; 5364 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 5365 status = -ENOMEM; 5366 if (seqid == NULL) 5367 goto out; 5368 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 5369 status = PTR_ERR(task); 5370 if (IS_ERR(task)) 5371 goto out; 5372 status = nfs4_wait_for_completion_rpc_task(task); 5373 rpc_put_task(task); 5374 out: 5375 request->fl_flags = fl_flags; 5376 trace_nfs4_unlock(request, state, F_SETLK, status); 5377 return status; 5378 } 5379 5380 struct nfs4_lockdata { 5381 struct nfs_lock_args arg; 5382 struct nfs_lock_res res; 5383 struct nfs4_lock_state *lsp; 5384 struct nfs_open_context *ctx; 5385 struct file_lock fl; 5386 unsigned long timestamp; 5387 int rpc_status; 5388 int cancelled; 5389 struct nfs_server *server; 5390 }; 5391 5392 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 5393 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 5394 gfp_t gfp_mask) 5395 { 5396 struct nfs4_lockdata *p; 5397 struct inode *inode = lsp->ls_state->inode; 5398 struct nfs_server *server = NFS_SERVER(inode); 5399 5400 p = kzalloc(sizeof(*p), gfp_mask); 5401 if (p == NULL) 5402 return NULL; 5403 5404 p->arg.fh = NFS_FH(inode); 5405 p->arg.fl = &p->fl; 5406 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 5407 if (p->arg.open_seqid == NULL) 5408 goto out_free; 5409 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask); 5410 if (p->arg.lock_seqid == NULL) 5411 goto out_free_seqid; 5412 p->arg.lock_stateid = &lsp->ls_stateid; 5413 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 5414 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 5415 p->arg.lock_owner.s_dev = server->s_dev; 5416 p->res.lock_seqid = p->arg.lock_seqid; 5417 p->lsp = lsp; 5418 p->server = server; 5419 atomic_inc(&lsp->ls_count); 5420 p->ctx = get_nfs_open_context(ctx); 5421 memcpy(&p->fl, fl, sizeof(p->fl)); 5422 return p; 5423 out_free_seqid: 5424 nfs_free_seqid(p->arg.open_seqid); 5425 out_free: 5426 kfree(p); 5427 return NULL; 5428 } 5429 5430 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 5431 { 5432 struct nfs4_lockdata *data = calldata; 5433 struct nfs4_state *state = data->lsp->ls_state; 5434 5435 dprintk("%s: begin!\n", __func__); 5436 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 5437 goto out_wait; 5438 /* Do we need to do an open_to_lock_owner? */ 5439 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { 5440 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 5441 goto out_release_lock_seqid; 5442 } 5443 data->arg.open_stateid = &state->open_stateid; 5444 data->arg.new_lock_owner = 1; 5445 data->res.open_seqid = data->arg.open_seqid; 5446 } else 5447 data->arg.new_lock_owner = 0; 5448 if (!nfs4_valid_open_stateid(state)) { 5449 data->rpc_status = -EBADF; 5450 task->tk_action = NULL; 5451 goto out_release_open_seqid; 5452 } 5453 data->timestamp = jiffies; 5454 if (nfs4_setup_sequence(data->server, 5455 &data->arg.seq_args, 5456 &data->res.seq_res, 5457 task) == 0) 5458 return; 5459 out_release_open_seqid: 5460 nfs_release_seqid(data->arg.open_seqid); 5461 out_release_lock_seqid: 5462 nfs_release_seqid(data->arg.lock_seqid); 5463 out_wait: 5464 nfs4_sequence_done(task, &data->res.seq_res); 5465 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 5466 } 5467 5468 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 5469 { 5470 struct nfs4_lockdata *data = calldata; 5471 5472 dprintk("%s: begin!\n", __func__); 5473 5474 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5475 return; 5476 5477 data->rpc_status = task->tk_status; 5478 if (data->arg.new_lock_owner != 0) { 5479 if (data->rpc_status == 0) 5480 nfs_confirm_seqid(&data->lsp->ls_seqid, 0); 5481 else 5482 goto out; 5483 } 5484 if (data->rpc_status == 0) { 5485 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid); 5486 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags); 5487 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp); 5488 } 5489 out: 5490 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 5491 } 5492 5493 static void nfs4_lock_release(void *calldata) 5494 { 5495 struct nfs4_lockdata *data = calldata; 5496 5497 dprintk("%s: begin!\n", __func__); 5498 nfs_free_seqid(data->arg.open_seqid); 5499 if (data->cancelled != 0) { 5500 struct rpc_task *task; 5501 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 5502 data->arg.lock_seqid); 5503 if (!IS_ERR(task)) 5504 rpc_put_task_async(task); 5505 dprintk("%s: cancelling lock!\n", __func__); 5506 } else 5507 nfs_free_seqid(data->arg.lock_seqid); 5508 nfs4_put_lock_state(data->lsp); 5509 put_nfs_open_context(data->ctx); 5510 kfree(data); 5511 dprintk("%s: done!\n", __func__); 5512 } 5513 5514 static const struct rpc_call_ops nfs4_lock_ops = { 5515 .rpc_call_prepare = nfs4_lock_prepare, 5516 .rpc_call_done = nfs4_lock_done, 5517 .rpc_release = nfs4_lock_release, 5518 }; 5519 5520 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 5521 { 5522 switch (error) { 5523 case -NFS4ERR_ADMIN_REVOKED: 5524 case -NFS4ERR_BAD_STATEID: 5525 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 5526 if (new_lock_owner != 0 || 5527 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 5528 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 5529 break; 5530 case -NFS4ERR_STALE_STATEID: 5531 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 5532 case -NFS4ERR_EXPIRED: 5533 nfs4_schedule_lease_recovery(server->nfs_client); 5534 }; 5535 } 5536 5537 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 5538 { 5539 struct nfs4_lockdata *data; 5540 struct rpc_task *task; 5541 struct rpc_message msg = { 5542 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 5543 .rpc_cred = state->owner->so_cred, 5544 }; 5545 struct rpc_task_setup task_setup_data = { 5546 .rpc_client = NFS_CLIENT(state->inode), 5547 .rpc_message = &msg, 5548 .callback_ops = &nfs4_lock_ops, 5549 .workqueue = nfsiod_workqueue, 5550 .flags = RPC_TASK_ASYNC, 5551 }; 5552 int ret; 5553 5554 dprintk("%s: begin!\n", __func__); 5555 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 5556 fl->fl_u.nfs4_fl.owner, 5557 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 5558 if (data == NULL) 5559 return -ENOMEM; 5560 if (IS_SETLKW(cmd)) 5561 data->arg.block = 1; 5562 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); 5563 msg.rpc_argp = &data->arg; 5564 msg.rpc_resp = &data->res; 5565 task_setup_data.callback_data = data; 5566 if (recovery_type > NFS_LOCK_NEW) { 5567 if (recovery_type == NFS_LOCK_RECLAIM) 5568 data->arg.reclaim = NFS_LOCK_RECLAIM; 5569 nfs4_set_sequence_privileged(&data->arg.seq_args); 5570 } 5571 task = rpc_run_task(&task_setup_data); 5572 if (IS_ERR(task)) 5573 return PTR_ERR(task); 5574 ret = nfs4_wait_for_completion_rpc_task(task); 5575 if (ret == 0) { 5576 ret = data->rpc_status; 5577 if (ret) 5578 nfs4_handle_setlk_error(data->server, data->lsp, 5579 data->arg.new_lock_owner, ret); 5580 } else 5581 data->cancelled = 1; 5582 rpc_put_task(task); 5583 dprintk("%s: done, ret = %d!\n", __func__, ret); 5584 return ret; 5585 } 5586 5587 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 5588 { 5589 struct nfs_server *server = NFS_SERVER(state->inode); 5590 struct nfs4_exception exception = { 5591 .inode = state->inode, 5592 }; 5593 int err; 5594 5595 do { 5596 /* Cache the lock if possible... */ 5597 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 5598 return 0; 5599 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 5600 trace_nfs4_lock_reclaim(request, state, F_SETLK, err); 5601 if (err != -NFS4ERR_DELAY) 5602 break; 5603 nfs4_handle_exception(server, err, &exception); 5604 } while (exception.retry); 5605 return err; 5606 } 5607 5608 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 5609 { 5610 struct nfs_server *server = NFS_SERVER(state->inode); 5611 struct nfs4_exception exception = { 5612 .inode = state->inode, 5613 }; 5614 int err; 5615 5616 err = nfs4_set_lock_state(state, request); 5617 if (err != 0) 5618 return err; 5619 if (!recover_lost_locks) { 5620 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 5621 return 0; 5622 } 5623 do { 5624 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 5625 return 0; 5626 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 5627 trace_nfs4_lock_expired(request, state, F_SETLK, err); 5628 switch (err) { 5629 default: 5630 goto out; 5631 case -NFS4ERR_GRACE: 5632 case -NFS4ERR_DELAY: 5633 nfs4_handle_exception(server, err, &exception); 5634 err = 0; 5635 } 5636 } while (exception.retry); 5637 out: 5638 return err; 5639 } 5640 5641 #if defined(CONFIG_NFS_V4_1) 5642 /** 5643 * nfs41_check_expired_locks - possibly free a lock stateid 5644 * 5645 * @state: NFSv4 state for an inode 5646 * 5647 * Returns NFS_OK if recovery for this stateid is now finished. 5648 * Otherwise a negative NFS4ERR value is returned. 5649 */ 5650 static int nfs41_check_expired_locks(struct nfs4_state *state) 5651 { 5652 int status, ret = -NFS4ERR_BAD_STATEID; 5653 struct nfs4_lock_state *lsp; 5654 struct nfs_server *server = NFS_SERVER(state->inode); 5655 5656 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 5657 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 5658 struct rpc_cred *cred = lsp->ls_state->owner->so_cred; 5659 5660 status = nfs41_test_stateid(server, 5661 &lsp->ls_stateid, 5662 cred); 5663 trace_nfs4_test_lock_stateid(state, lsp, status); 5664 if (status != NFS_OK) { 5665 /* Free the stateid unless the server 5666 * informs us the stateid is unrecognized. */ 5667 if (status != -NFS4ERR_BAD_STATEID) 5668 nfs41_free_stateid(server, 5669 &lsp->ls_stateid, 5670 cred); 5671 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 5672 ret = status; 5673 } 5674 } 5675 }; 5676 5677 return ret; 5678 } 5679 5680 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 5681 { 5682 int status = NFS_OK; 5683 5684 if (test_bit(LK_STATE_IN_USE, &state->flags)) 5685 status = nfs41_check_expired_locks(state); 5686 if (status != NFS_OK) 5687 status = nfs4_lock_expired(state, request); 5688 return status; 5689 } 5690 #endif 5691 5692 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5693 { 5694 struct nfs4_state_owner *sp = state->owner; 5695 struct nfs_inode *nfsi = NFS_I(state->inode); 5696 unsigned char fl_flags = request->fl_flags; 5697 unsigned int seq; 5698 int status = -ENOLCK; 5699 5700 if ((fl_flags & FL_POSIX) && 5701 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 5702 goto out; 5703 /* Is this a delegated open? */ 5704 status = nfs4_set_lock_state(state, request); 5705 if (status != 0) 5706 goto out; 5707 request->fl_flags |= FL_ACCESS; 5708 status = do_vfs_lock(request->fl_file, request); 5709 if (status < 0) 5710 goto out; 5711 down_read(&nfsi->rwsem); 5712 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 5713 /* Yes: cache locks! */ 5714 /* ...but avoid races with delegation recall... */ 5715 request->fl_flags = fl_flags & ~FL_SLEEP; 5716 status = do_vfs_lock(request->fl_file, request); 5717 goto out_unlock; 5718 } 5719 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 5720 up_read(&nfsi->rwsem); 5721 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 5722 if (status != 0) 5723 goto out; 5724 down_read(&nfsi->rwsem); 5725 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) { 5726 status = -NFS4ERR_DELAY; 5727 goto out_unlock; 5728 } 5729 /* Note: we always want to sleep here! */ 5730 request->fl_flags = fl_flags | FL_SLEEP; 5731 if (do_vfs_lock(request->fl_file, request) < 0) 5732 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock " 5733 "manager!\n", __func__); 5734 out_unlock: 5735 up_read(&nfsi->rwsem); 5736 out: 5737 request->fl_flags = fl_flags; 5738 return status; 5739 } 5740 5741 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5742 { 5743 struct nfs4_exception exception = { 5744 .state = state, 5745 .inode = state->inode, 5746 }; 5747 int err; 5748 5749 do { 5750 err = _nfs4_proc_setlk(state, cmd, request); 5751 trace_nfs4_set_lock(request, state, cmd, err); 5752 if (err == -NFS4ERR_DENIED) 5753 err = -EAGAIN; 5754 err = nfs4_handle_exception(NFS_SERVER(state->inode), 5755 err, &exception); 5756 } while (exception.retry); 5757 return err; 5758 } 5759 5760 static int 5761 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 5762 { 5763 struct nfs_open_context *ctx; 5764 struct nfs4_state *state; 5765 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 5766 int status; 5767 5768 /* verify open state */ 5769 ctx = nfs_file_open_context(filp); 5770 state = ctx->state; 5771 5772 if (request->fl_start < 0 || request->fl_end < 0) 5773 return -EINVAL; 5774 5775 if (IS_GETLK(cmd)) { 5776 if (state != NULL) 5777 return nfs4_proc_getlk(state, F_GETLK, request); 5778 return 0; 5779 } 5780 5781 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 5782 return -EINVAL; 5783 5784 if (request->fl_type == F_UNLCK) { 5785 if (state != NULL) 5786 return nfs4_proc_unlck(state, cmd, request); 5787 return 0; 5788 } 5789 5790 if (state == NULL) 5791 return -ENOLCK; 5792 /* 5793 * Don't rely on the VFS having checked the file open mode, 5794 * since it won't do this for flock() locks. 5795 */ 5796 switch (request->fl_type) { 5797 case F_RDLCK: 5798 if (!(filp->f_mode & FMODE_READ)) 5799 return -EBADF; 5800 break; 5801 case F_WRLCK: 5802 if (!(filp->f_mode & FMODE_WRITE)) 5803 return -EBADF; 5804 } 5805 5806 do { 5807 status = nfs4_proc_setlk(state, cmd, request); 5808 if ((status != -EAGAIN) || IS_SETLK(cmd)) 5809 break; 5810 timeout = nfs4_set_lock_task_retry(timeout); 5811 status = -ERESTARTSYS; 5812 if (signalled()) 5813 break; 5814 } while(status < 0); 5815 return status; 5816 } 5817 5818 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 5819 { 5820 struct nfs_server *server = NFS_SERVER(state->inode); 5821 int err; 5822 5823 err = nfs4_set_lock_state(state, fl); 5824 if (err != 0) 5825 return err; 5826 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 5827 return nfs4_handle_delegation_recall_error(server, state, stateid, err); 5828 } 5829 5830 struct nfs_release_lockowner_data { 5831 struct nfs4_lock_state *lsp; 5832 struct nfs_server *server; 5833 struct nfs_release_lockowner_args args; 5834 struct nfs4_sequence_args seq_args; 5835 struct nfs4_sequence_res seq_res; 5836 unsigned long timestamp; 5837 }; 5838 5839 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 5840 { 5841 struct nfs_release_lockowner_data *data = calldata; 5842 nfs40_setup_sequence(data->server, 5843 &data->seq_args, &data->seq_res, task); 5844 data->timestamp = jiffies; 5845 } 5846 5847 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 5848 { 5849 struct nfs_release_lockowner_data *data = calldata; 5850 struct nfs_server *server = data->server; 5851 5852 nfs40_sequence_done(task, &data->seq_res); 5853 5854 switch (task->tk_status) { 5855 case 0: 5856 renew_lease(server, data->timestamp); 5857 break; 5858 case -NFS4ERR_STALE_CLIENTID: 5859 case -NFS4ERR_EXPIRED: 5860 case -NFS4ERR_LEASE_MOVED: 5861 case -NFS4ERR_DELAY: 5862 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) 5863 rpc_restart_call_prepare(task); 5864 } 5865 } 5866 5867 static void nfs4_release_lockowner_release(void *calldata) 5868 { 5869 struct nfs_release_lockowner_data *data = calldata; 5870 nfs4_free_lock_state(data->server, data->lsp); 5871 kfree(calldata); 5872 } 5873 5874 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 5875 .rpc_call_prepare = nfs4_release_lockowner_prepare, 5876 .rpc_call_done = nfs4_release_lockowner_done, 5877 .rpc_release = nfs4_release_lockowner_release, 5878 }; 5879 5880 static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 5881 { 5882 struct nfs_release_lockowner_data *data; 5883 struct rpc_message msg = { 5884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 5885 }; 5886 5887 if (server->nfs_client->cl_mvops->minor_version != 0) 5888 return -EINVAL; 5889 5890 data = kmalloc(sizeof(*data), GFP_NOFS); 5891 if (!data) 5892 return -ENOMEM; 5893 nfs4_init_sequence(&data->seq_args, &data->seq_res, 0); 5894 data->lsp = lsp; 5895 data->server = server; 5896 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 5897 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 5898 data->args.lock_owner.s_dev = server->s_dev; 5899 5900 msg.rpc_argp = &data->args; 5901 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 5902 return 0; 5903 } 5904 5905 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 5906 5907 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key, 5908 const void *buf, size_t buflen, 5909 int flags, int type) 5910 { 5911 if (strcmp(key, "") != 0) 5912 return -EINVAL; 5913 5914 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen); 5915 } 5916 5917 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key, 5918 void *buf, size_t buflen, int type) 5919 { 5920 if (strcmp(key, "") != 0) 5921 return -EINVAL; 5922 5923 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen); 5924 } 5925 5926 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list, 5927 size_t list_len, const char *name, 5928 size_t name_len, int type) 5929 { 5930 size_t len = sizeof(XATTR_NAME_NFSV4_ACL); 5931 5932 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) 5933 return 0; 5934 5935 if (list && len <= list_len) 5936 memcpy(list, XATTR_NAME_NFSV4_ACL, len); 5937 return len; 5938 } 5939 5940 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 5941 static inline int nfs4_server_supports_labels(struct nfs_server *server) 5942 { 5943 return server->caps & NFS_CAP_SECURITY_LABEL; 5944 } 5945 5946 static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key, 5947 const void *buf, size_t buflen, 5948 int flags, int type) 5949 { 5950 if (security_ismaclabel(key)) 5951 return nfs4_set_security_label(dentry, buf, buflen); 5952 5953 return -EOPNOTSUPP; 5954 } 5955 5956 static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key, 5957 void *buf, size_t buflen, int type) 5958 { 5959 if (security_ismaclabel(key)) 5960 return nfs4_get_security_label(dentry->d_inode, buf, buflen); 5961 return -EOPNOTSUPP; 5962 } 5963 5964 static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list, 5965 size_t list_len, const char *name, 5966 size_t name_len, int type) 5967 { 5968 size_t len = 0; 5969 5970 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) { 5971 len = security_inode_listsecurity(dentry->d_inode, NULL, 0); 5972 if (list && len <= list_len) 5973 security_inode_listsecurity(dentry->d_inode, list, len); 5974 } 5975 return len; 5976 } 5977 5978 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 5979 .prefix = XATTR_SECURITY_PREFIX, 5980 .list = nfs4_xattr_list_nfs4_label, 5981 .get = nfs4_xattr_get_nfs4_label, 5982 .set = nfs4_xattr_set_nfs4_label, 5983 }; 5984 #endif 5985 5986 5987 /* 5988 * nfs_fhget will use either the mounted_on_fileid or the fileid 5989 */ 5990 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 5991 { 5992 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 5993 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 5994 (fattr->valid & NFS_ATTR_FATTR_FSID) && 5995 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 5996 return; 5997 5998 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 5999 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 6000 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 6001 fattr->nlink = 2; 6002 } 6003 6004 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 6005 const struct qstr *name, 6006 struct nfs4_fs_locations *fs_locations, 6007 struct page *page) 6008 { 6009 struct nfs_server *server = NFS_SERVER(dir); 6010 u32 bitmask[3] = { 6011 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6012 }; 6013 struct nfs4_fs_locations_arg args = { 6014 .dir_fh = NFS_FH(dir), 6015 .name = name, 6016 .page = page, 6017 .bitmask = bitmask, 6018 }; 6019 struct nfs4_fs_locations_res res = { 6020 .fs_locations = fs_locations, 6021 }; 6022 struct rpc_message msg = { 6023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6024 .rpc_argp = &args, 6025 .rpc_resp = &res, 6026 }; 6027 int status; 6028 6029 dprintk("%s: start\n", __func__); 6030 6031 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 6032 * is not supported */ 6033 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 6034 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID; 6035 else 6036 bitmask[0] |= FATTR4_WORD0_FILEID; 6037 6038 nfs_fattr_init(&fs_locations->fattr); 6039 fs_locations->server = server; 6040 fs_locations->nlocations = 0; 6041 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 6042 dprintk("%s: returned status = %d\n", __func__, status); 6043 return status; 6044 } 6045 6046 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 6047 const struct qstr *name, 6048 struct nfs4_fs_locations *fs_locations, 6049 struct page *page) 6050 { 6051 struct nfs4_exception exception = { }; 6052 int err; 6053 do { 6054 err = _nfs4_proc_fs_locations(client, dir, name, 6055 fs_locations, page); 6056 trace_nfs4_get_fs_locations(dir, name, err); 6057 err = nfs4_handle_exception(NFS_SERVER(dir), err, 6058 &exception); 6059 } while (exception.retry); 6060 return err; 6061 } 6062 6063 /* 6064 * This operation also signals the server that this client is 6065 * performing migration recovery. The server can stop returning 6066 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 6067 * appended to this compound to identify the client ID which is 6068 * performing recovery. 6069 */ 6070 static int _nfs40_proc_get_locations(struct inode *inode, 6071 struct nfs4_fs_locations *locations, 6072 struct page *page, struct rpc_cred *cred) 6073 { 6074 struct nfs_server *server = NFS_SERVER(inode); 6075 struct rpc_clnt *clnt = server->client; 6076 u32 bitmask[2] = { 6077 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6078 }; 6079 struct nfs4_fs_locations_arg args = { 6080 .clientid = server->nfs_client->cl_clientid, 6081 .fh = NFS_FH(inode), 6082 .page = page, 6083 .bitmask = bitmask, 6084 .migration = 1, /* skip LOOKUP */ 6085 .renew = 1, /* append RENEW */ 6086 }; 6087 struct nfs4_fs_locations_res res = { 6088 .fs_locations = locations, 6089 .migration = 1, 6090 .renew = 1, 6091 }; 6092 struct rpc_message msg = { 6093 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6094 .rpc_argp = &args, 6095 .rpc_resp = &res, 6096 .rpc_cred = cred, 6097 }; 6098 unsigned long now = jiffies; 6099 int status; 6100 6101 nfs_fattr_init(&locations->fattr); 6102 locations->server = server; 6103 locations->nlocations = 0; 6104 6105 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6106 nfs4_set_sequence_privileged(&args.seq_args); 6107 status = nfs4_call_sync_sequence(clnt, server, &msg, 6108 &args.seq_args, &res.seq_res); 6109 if (status) 6110 return status; 6111 6112 renew_lease(server, now); 6113 return 0; 6114 } 6115 6116 #ifdef CONFIG_NFS_V4_1 6117 6118 /* 6119 * This operation also signals the server that this client is 6120 * performing migration recovery. The server can stop asserting 6121 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 6122 * performing this operation is identified in the SEQUENCE 6123 * operation in this compound. 6124 * 6125 * When the client supports GETATTR(fs_locations_info), it can 6126 * be plumbed in here. 6127 */ 6128 static int _nfs41_proc_get_locations(struct inode *inode, 6129 struct nfs4_fs_locations *locations, 6130 struct page *page, struct rpc_cred *cred) 6131 { 6132 struct nfs_server *server = NFS_SERVER(inode); 6133 struct rpc_clnt *clnt = server->client; 6134 u32 bitmask[2] = { 6135 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6136 }; 6137 struct nfs4_fs_locations_arg args = { 6138 .fh = NFS_FH(inode), 6139 .page = page, 6140 .bitmask = bitmask, 6141 .migration = 1, /* skip LOOKUP */ 6142 }; 6143 struct nfs4_fs_locations_res res = { 6144 .fs_locations = locations, 6145 .migration = 1, 6146 }; 6147 struct rpc_message msg = { 6148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6149 .rpc_argp = &args, 6150 .rpc_resp = &res, 6151 .rpc_cred = cred, 6152 }; 6153 int status; 6154 6155 nfs_fattr_init(&locations->fattr); 6156 locations->server = server; 6157 locations->nlocations = 0; 6158 6159 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6160 nfs4_set_sequence_privileged(&args.seq_args); 6161 status = nfs4_call_sync_sequence(clnt, server, &msg, 6162 &args.seq_args, &res.seq_res); 6163 if (status == NFS4_OK && 6164 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 6165 status = -NFS4ERR_LEASE_MOVED; 6166 return status; 6167 } 6168 6169 #endif /* CONFIG_NFS_V4_1 */ 6170 6171 /** 6172 * nfs4_proc_get_locations - discover locations for a migrated FSID 6173 * @inode: inode on FSID that is migrating 6174 * @locations: result of query 6175 * @page: buffer 6176 * @cred: credential to use for this operation 6177 * 6178 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 6179 * operation failed, or a negative errno if a local error occurred. 6180 * 6181 * On success, "locations" is filled in, but if the server has 6182 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 6183 * asserted. 6184 * 6185 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 6186 * from this client that require migration recovery. 6187 */ 6188 int nfs4_proc_get_locations(struct inode *inode, 6189 struct nfs4_fs_locations *locations, 6190 struct page *page, struct rpc_cred *cred) 6191 { 6192 struct nfs_server *server = NFS_SERVER(inode); 6193 struct nfs_client *clp = server->nfs_client; 6194 const struct nfs4_mig_recovery_ops *ops = 6195 clp->cl_mvops->mig_recovery_ops; 6196 struct nfs4_exception exception = { }; 6197 int status; 6198 6199 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 6200 (unsigned long long)server->fsid.major, 6201 (unsigned long long)server->fsid.minor, 6202 clp->cl_hostname); 6203 nfs_display_fhandle(NFS_FH(inode), __func__); 6204 6205 do { 6206 status = ops->get_locations(inode, locations, page, cred); 6207 if (status != -NFS4ERR_DELAY) 6208 break; 6209 nfs4_handle_exception(server, status, &exception); 6210 } while (exception.retry); 6211 return status; 6212 } 6213 6214 /* 6215 * This operation also signals the server that this client is 6216 * performing "lease moved" recovery. The server can stop 6217 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 6218 * is appended to this compound to identify the client ID which is 6219 * performing recovery. 6220 */ 6221 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6222 { 6223 struct nfs_server *server = NFS_SERVER(inode); 6224 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 6225 struct rpc_clnt *clnt = server->client; 6226 struct nfs4_fsid_present_arg args = { 6227 .fh = NFS_FH(inode), 6228 .clientid = clp->cl_clientid, 6229 .renew = 1, /* append RENEW */ 6230 }; 6231 struct nfs4_fsid_present_res res = { 6232 .renew = 1, 6233 }; 6234 struct rpc_message msg = { 6235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 6236 .rpc_argp = &args, 6237 .rpc_resp = &res, 6238 .rpc_cred = cred, 6239 }; 6240 unsigned long now = jiffies; 6241 int status; 6242 6243 res.fh = nfs_alloc_fhandle(); 6244 if (res.fh == NULL) 6245 return -ENOMEM; 6246 6247 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6248 nfs4_set_sequence_privileged(&args.seq_args); 6249 status = nfs4_call_sync_sequence(clnt, server, &msg, 6250 &args.seq_args, &res.seq_res); 6251 nfs_free_fhandle(res.fh); 6252 if (status) 6253 return status; 6254 6255 do_renew_lease(clp, now); 6256 return 0; 6257 } 6258 6259 #ifdef CONFIG_NFS_V4_1 6260 6261 /* 6262 * This operation also signals the server that this client is 6263 * performing "lease moved" recovery. The server can stop asserting 6264 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 6265 * this operation is identified in the SEQUENCE operation in this 6266 * compound. 6267 */ 6268 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6269 { 6270 struct nfs_server *server = NFS_SERVER(inode); 6271 struct rpc_clnt *clnt = server->client; 6272 struct nfs4_fsid_present_arg args = { 6273 .fh = NFS_FH(inode), 6274 }; 6275 struct nfs4_fsid_present_res res = { 6276 }; 6277 struct rpc_message msg = { 6278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 6279 .rpc_argp = &args, 6280 .rpc_resp = &res, 6281 .rpc_cred = cred, 6282 }; 6283 int status; 6284 6285 res.fh = nfs_alloc_fhandle(); 6286 if (res.fh == NULL) 6287 return -ENOMEM; 6288 6289 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6290 nfs4_set_sequence_privileged(&args.seq_args); 6291 status = nfs4_call_sync_sequence(clnt, server, &msg, 6292 &args.seq_args, &res.seq_res); 6293 nfs_free_fhandle(res.fh); 6294 if (status == NFS4_OK && 6295 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 6296 status = -NFS4ERR_LEASE_MOVED; 6297 return status; 6298 } 6299 6300 #endif /* CONFIG_NFS_V4_1 */ 6301 6302 /** 6303 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 6304 * @inode: inode on FSID to check 6305 * @cred: credential to use for this operation 6306 * 6307 * Server indicates whether the FSID is present, moved, or not 6308 * recognized. This operation is necessary to clear a LEASE_MOVED 6309 * condition for this client ID. 6310 * 6311 * Returns NFS4_OK if the FSID is present on this server, 6312 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 6313 * NFS4ERR code if some error occurred on the server, or a 6314 * negative errno if a local failure occurred. 6315 */ 6316 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6317 { 6318 struct nfs_server *server = NFS_SERVER(inode); 6319 struct nfs_client *clp = server->nfs_client; 6320 const struct nfs4_mig_recovery_ops *ops = 6321 clp->cl_mvops->mig_recovery_ops; 6322 struct nfs4_exception exception = { }; 6323 int status; 6324 6325 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 6326 (unsigned long long)server->fsid.major, 6327 (unsigned long long)server->fsid.minor, 6328 clp->cl_hostname); 6329 nfs_display_fhandle(NFS_FH(inode), __func__); 6330 6331 do { 6332 status = ops->fsid_present(inode, cred); 6333 if (status != -NFS4ERR_DELAY) 6334 break; 6335 nfs4_handle_exception(server, status, &exception); 6336 } while (exception.retry); 6337 return status; 6338 } 6339 6340 /** 6341 * If 'use_integrity' is true and the state managment nfs_client 6342 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 6343 * and the machine credential as per RFC3530bis and RFC5661 Security 6344 * Considerations sections. Otherwise, just use the user cred with the 6345 * filesystem's rpc_client. 6346 */ 6347 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 6348 { 6349 int status; 6350 struct nfs4_secinfo_arg args = { 6351 .dir_fh = NFS_FH(dir), 6352 .name = name, 6353 }; 6354 struct nfs4_secinfo_res res = { 6355 .flavors = flavors, 6356 }; 6357 struct rpc_message msg = { 6358 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 6359 .rpc_argp = &args, 6360 .rpc_resp = &res, 6361 }; 6362 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 6363 struct rpc_cred *cred = NULL; 6364 6365 if (use_integrity) { 6366 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient; 6367 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client); 6368 msg.rpc_cred = cred; 6369 } 6370 6371 dprintk("NFS call secinfo %s\n", name->name); 6372 6373 nfs4_state_protect(NFS_SERVER(dir)->nfs_client, 6374 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 6375 6376 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, 6377 &res.seq_res, 0); 6378 dprintk("NFS reply secinfo: %d\n", status); 6379 6380 if (cred) 6381 put_rpccred(cred); 6382 6383 return status; 6384 } 6385 6386 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 6387 struct nfs4_secinfo_flavors *flavors) 6388 { 6389 struct nfs4_exception exception = { }; 6390 int err; 6391 do { 6392 err = -NFS4ERR_WRONGSEC; 6393 6394 /* try to use integrity protection with machine cred */ 6395 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 6396 err = _nfs4_proc_secinfo(dir, name, flavors, true); 6397 6398 /* 6399 * if unable to use integrity protection, or SECINFO with 6400 * integrity protection returns NFS4ERR_WRONGSEC (which is 6401 * disallowed by spec, but exists in deployed servers) use 6402 * the current filesystem's rpc_client and the user cred. 6403 */ 6404 if (err == -NFS4ERR_WRONGSEC) 6405 err = _nfs4_proc_secinfo(dir, name, flavors, false); 6406 6407 trace_nfs4_secinfo(dir, name, err); 6408 err = nfs4_handle_exception(NFS_SERVER(dir), err, 6409 &exception); 6410 } while (exception.retry); 6411 return err; 6412 } 6413 6414 #ifdef CONFIG_NFS_V4_1 6415 /* 6416 * Check the exchange flags returned by the server for invalid flags, having 6417 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 6418 * DS flags set. 6419 */ 6420 static int nfs4_check_cl_exchange_flags(u32 flags) 6421 { 6422 if (flags & ~EXCHGID4_FLAG_MASK_R) 6423 goto out_inval; 6424 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 6425 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 6426 goto out_inval; 6427 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 6428 goto out_inval; 6429 return NFS_OK; 6430 out_inval: 6431 return -NFS4ERR_INVAL; 6432 } 6433 6434 static bool 6435 nfs41_same_server_scope(struct nfs41_server_scope *a, 6436 struct nfs41_server_scope *b) 6437 { 6438 if (a->server_scope_sz == b->server_scope_sz && 6439 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0) 6440 return true; 6441 6442 return false; 6443 } 6444 6445 /* 6446 * nfs4_proc_bind_conn_to_session() 6447 * 6448 * The 4.1 client currently uses the same TCP connection for the 6449 * fore and backchannel. 6450 */ 6451 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred) 6452 { 6453 int status; 6454 struct nfs41_bind_conn_to_session_res res; 6455 struct rpc_message msg = { 6456 .rpc_proc = 6457 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 6458 .rpc_argp = clp, 6459 .rpc_resp = &res, 6460 .rpc_cred = cred, 6461 }; 6462 6463 dprintk("--> %s\n", __func__); 6464 6465 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); 6466 if (unlikely(res.session == NULL)) { 6467 status = -ENOMEM; 6468 goto out; 6469 } 6470 6471 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 6472 trace_nfs4_bind_conn_to_session(clp, status); 6473 if (status == 0) { 6474 if (memcmp(res.session->sess_id.data, 6475 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 6476 dprintk("NFS: %s: Session ID mismatch\n", __func__); 6477 status = -EIO; 6478 goto out_session; 6479 } 6480 if (res.dir != NFS4_CDFS4_BOTH) { 6481 dprintk("NFS: %s: Unexpected direction from server\n", 6482 __func__); 6483 status = -EIO; 6484 goto out_session; 6485 } 6486 if (res.use_conn_in_rdma_mode) { 6487 dprintk("NFS: %s: Server returned RDMA mode = true\n", 6488 __func__); 6489 status = -EIO; 6490 goto out_session; 6491 } 6492 } 6493 out_session: 6494 kfree(res.session); 6495 out: 6496 dprintk("<-- %s status= %d\n", __func__, status); 6497 return status; 6498 } 6499 6500 /* 6501 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 6502 * and operations we'd like to see to enable certain features in the allow map 6503 */ 6504 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 6505 .how = SP4_MACH_CRED, 6506 .enforce.u.words = { 6507 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 6508 1 << (OP_EXCHANGE_ID - 32) | 6509 1 << (OP_CREATE_SESSION - 32) | 6510 1 << (OP_DESTROY_SESSION - 32) | 6511 1 << (OP_DESTROY_CLIENTID - 32) 6512 }, 6513 .allow.u.words = { 6514 [0] = 1 << (OP_CLOSE) | 6515 1 << (OP_LOCKU) | 6516 1 << (OP_COMMIT), 6517 [1] = 1 << (OP_SECINFO - 32) | 6518 1 << (OP_SECINFO_NO_NAME - 32) | 6519 1 << (OP_TEST_STATEID - 32) | 6520 1 << (OP_FREE_STATEID - 32) | 6521 1 << (OP_WRITE - 32) 6522 } 6523 }; 6524 6525 /* 6526 * Select the state protection mode for client `clp' given the server results 6527 * from exchange_id in `sp'. 6528 * 6529 * Returns 0 on success, negative errno otherwise. 6530 */ 6531 static int nfs4_sp4_select_mode(struct nfs_client *clp, 6532 struct nfs41_state_protection *sp) 6533 { 6534 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 6535 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 6536 1 << (OP_EXCHANGE_ID - 32) | 6537 1 << (OP_CREATE_SESSION - 32) | 6538 1 << (OP_DESTROY_SESSION - 32) | 6539 1 << (OP_DESTROY_CLIENTID - 32) 6540 }; 6541 unsigned int i; 6542 6543 if (sp->how == SP4_MACH_CRED) { 6544 /* Print state protect result */ 6545 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 6546 for (i = 0; i <= LAST_NFS4_OP; i++) { 6547 if (test_bit(i, sp->enforce.u.longs)) 6548 dfprintk(MOUNT, " enforce op %d\n", i); 6549 if (test_bit(i, sp->allow.u.longs)) 6550 dfprintk(MOUNT, " allow op %d\n", i); 6551 } 6552 6553 /* make sure nothing is on enforce list that isn't supported */ 6554 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 6555 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 6556 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 6557 return -EINVAL; 6558 } 6559 } 6560 6561 /* 6562 * Minimal mode - state operations are allowed to use machine 6563 * credential. Note this already happens by default, so the 6564 * client doesn't have to do anything more than the negotiation. 6565 * 6566 * NOTE: we don't care if EXCHANGE_ID is in the list - 6567 * we're already using the machine cred for exchange_id 6568 * and will never use a different cred. 6569 */ 6570 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 6571 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 6572 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 6573 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 6574 dfprintk(MOUNT, "sp4_mach_cred:\n"); 6575 dfprintk(MOUNT, " minimal mode enabled\n"); 6576 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags); 6577 } else { 6578 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 6579 return -EINVAL; 6580 } 6581 6582 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 6583 test_bit(OP_LOCKU, sp->allow.u.longs)) { 6584 dfprintk(MOUNT, " cleanup mode enabled\n"); 6585 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags); 6586 } 6587 6588 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 6589 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 6590 dfprintk(MOUNT, " secinfo mode enabled\n"); 6591 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags); 6592 } 6593 6594 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 6595 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 6596 dfprintk(MOUNT, " stateid mode enabled\n"); 6597 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags); 6598 } 6599 6600 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 6601 dfprintk(MOUNT, " write mode enabled\n"); 6602 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags); 6603 } 6604 6605 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 6606 dfprintk(MOUNT, " commit mode enabled\n"); 6607 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags); 6608 } 6609 } 6610 6611 return 0; 6612 } 6613 6614 /* 6615 * _nfs4_proc_exchange_id() 6616 * 6617 * Wrapper for EXCHANGE_ID operation. 6618 */ 6619 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred, 6620 u32 sp4_how) 6621 { 6622 nfs4_verifier verifier; 6623 struct nfs41_exchange_id_args args = { 6624 .verifier = &verifier, 6625 .client = clp, 6626 #ifdef CONFIG_NFS_V4_1_MIGRATION 6627 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 6628 EXCHGID4_FLAG_BIND_PRINC_STATEID | 6629 EXCHGID4_FLAG_SUPP_MOVED_MIGR, 6630 #else 6631 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 6632 EXCHGID4_FLAG_BIND_PRINC_STATEID, 6633 #endif 6634 }; 6635 struct nfs41_exchange_id_res res = { 6636 0 6637 }; 6638 int status; 6639 struct rpc_message msg = { 6640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 6641 .rpc_argp = &args, 6642 .rpc_resp = &res, 6643 .rpc_cred = cred, 6644 }; 6645 6646 nfs4_init_boot_verifier(clp, &verifier); 6647 args.id_len = nfs4_init_uniform_client_string(clp, args.id, 6648 sizeof(args.id)); 6649 dprintk("NFS call exchange_id auth=%s, '%.*s'\n", 6650 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6651 args.id_len, args.id); 6652 6653 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 6654 GFP_NOFS); 6655 if (unlikely(res.server_owner == NULL)) { 6656 status = -ENOMEM; 6657 goto out; 6658 } 6659 6660 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 6661 GFP_NOFS); 6662 if (unlikely(res.server_scope == NULL)) { 6663 status = -ENOMEM; 6664 goto out_server_owner; 6665 } 6666 6667 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 6668 if (unlikely(res.impl_id == NULL)) { 6669 status = -ENOMEM; 6670 goto out_server_scope; 6671 } 6672 6673 switch (sp4_how) { 6674 case SP4_NONE: 6675 args.state_protect.how = SP4_NONE; 6676 break; 6677 6678 case SP4_MACH_CRED: 6679 args.state_protect = nfs4_sp4_mach_cred_request; 6680 break; 6681 6682 default: 6683 /* unsupported! */ 6684 WARN_ON_ONCE(1); 6685 status = -EINVAL; 6686 goto out_server_scope; 6687 } 6688 6689 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 6690 trace_nfs4_exchange_id(clp, status); 6691 if (status == 0) 6692 status = nfs4_check_cl_exchange_flags(res.flags); 6693 6694 if (status == 0) 6695 status = nfs4_sp4_select_mode(clp, &res.state_protect); 6696 6697 if (status == 0) { 6698 clp->cl_clientid = res.clientid; 6699 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R); 6700 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) 6701 clp->cl_seqid = res.seqid; 6702 6703 kfree(clp->cl_serverowner); 6704 clp->cl_serverowner = res.server_owner; 6705 res.server_owner = NULL; 6706 6707 /* use the most recent implementation id */ 6708 kfree(clp->cl_implid); 6709 clp->cl_implid = res.impl_id; 6710 6711 if (clp->cl_serverscope != NULL && 6712 !nfs41_same_server_scope(clp->cl_serverscope, 6713 res.server_scope)) { 6714 dprintk("%s: server_scope mismatch detected\n", 6715 __func__); 6716 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 6717 kfree(clp->cl_serverscope); 6718 clp->cl_serverscope = NULL; 6719 } 6720 6721 if (clp->cl_serverscope == NULL) { 6722 clp->cl_serverscope = res.server_scope; 6723 goto out; 6724 } 6725 } else 6726 kfree(res.impl_id); 6727 6728 out_server_owner: 6729 kfree(res.server_owner); 6730 out_server_scope: 6731 kfree(res.server_scope); 6732 out: 6733 if (clp->cl_implid != NULL) 6734 dprintk("NFS reply exchange_id: Server Implementation ID: " 6735 "domain: %s, name: %s, date: %llu,%u\n", 6736 clp->cl_implid->domain, clp->cl_implid->name, 6737 clp->cl_implid->date.seconds, 6738 clp->cl_implid->date.nseconds); 6739 dprintk("NFS reply exchange_id: %d\n", status); 6740 return status; 6741 } 6742 6743 /* 6744 * nfs4_proc_exchange_id() 6745 * 6746 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6747 * 6748 * Since the clientid has expired, all compounds using sessions 6749 * associated with the stale clientid will be returning 6750 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 6751 * be in some phase of session reset. 6752 * 6753 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 6754 */ 6755 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) 6756 { 6757 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 6758 int status; 6759 6760 /* try SP4_MACH_CRED if krb5i/p */ 6761 if (authflavor == RPC_AUTH_GSS_KRB5I || 6762 authflavor == RPC_AUTH_GSS_KRB5P) { 6763 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 6764 if (!status) 6765 return 0; 6766 } 6767 6768 /* try SP4_NONE */ 6769 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 6770 } 6771 6772 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 6773 struct rpc_cred *cred) 6774 { 6775 struct rpc_message msg = { 6776 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 6777 .rpc_argp = clp, 6778 .rpc_cred = cred, 6779 }; 6780 int status; 6781 6782 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 6783 trace_nfs4_destroy_clientid(clp, status); 6784 if (status) 6785 dprintk("NFS: Got error %d from the server %s on " 6786 "DESTROY_CLIENTID.", status, clp->cl_hostname); 6787 return status; 6788 } 6789 6790 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 6791 struct rpc_cred *cred) 6792 { 6793 unsigned int loop; 6794 int ret; 6795 6796 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 6797 ret = _nfs4_proc_destroy_clientid(clp, cred); 6798 switch (ret) { 6799 case -NFS4ERR_DELAY: 6800 case -NFS4ERR_CLIENTID_BUSY: 6801 ssleep(1); 6802 break; 6803 default: 6804 return ret; 6805 } 6806 } 6807 return 0; 6808 } 6809 6810 int nfs4_destroy_clientid(struct nfs_client *clp) 6811 { 6812 struct rpc_cred *cred; 6813 int ret = 0; 6814 6815 if (clp->cl_mvops->minor_version < 1) 6816 goto out; 6817 if (clp->cl_exchange_flags == 0) 6818 goto out; 6819 if (clp->cl_preserve_clid) 6820 goto out; 6821 cred = nfs4_get_clid_cred(clp); 6822 ret = nfs4_proc_destroy_clientid(clp, cred); 6823 if (cred) 6824 put_rpccred(cred); 6825 switch (ret) { 6826 case 0: 6827 case -NFS4ERR_STALE_CLIENTID: 6828 clp->cl_exchange_flags = 0; 6829 } 6830 out: 6831 return ret; 6832 } 6833 6834 struct nfs4_get_lease_time_data { 6835 struct nfs4_get_lease_time_args *args; 6836 struct nfs4_get_lease_time_res *res; 6837 struct nfs_client *clp; 6838 }; 6839 6840 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 6841 void *calldata) 6842 { 6843 struct nfs4_get_lease_time_data *data = 6844 (struct nfs4_get_lease_time_data *)calldata; 6845 6846 dprintk("--> %s\n", __func__); 6847 /* just setup sequence, do not trigger session recovery 6848 since we're invoked within one */ 6849 nfs41_setup_sequence(data->clp->cl_session, 6850 &data->args->la_seq_args, 6851 &data->res->lr_seq_res, 6852 task); 6853 dprintk("<-- %s\n", __func__); 6854 } 6855 6856 /* 6857 * Called from nfs4_state_manager thread for session setup, so don't recover 6858 * from sequence operation or clientid errors. 6859 */ 6860 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 6861 { 6862 struct nfs4_get_lease_time_data *data = 6863 (struct nfs4_get_lease_time_data *)calldata; 6864 6865 dprintk("--> %s\n", __func__); 6866 if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) 6867 return; 6868 switch (task->tk_status) { 6869 case -NFS4ERR_DELAY: 6870 case -NFS4ERR_GRACE: 6871 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 6872 rpc_delay(task, NFS4_POLL_RETRY_MIN); 6873 task->tk_status = 0; 6874 /* fall through */ 6875 case -NFS4ERR_RETRY_UNCACHED_REP: 6876 rpc_restart_call_prepare(task); 6877 return; 6878 } 6879 dprintk("<-- %s\n", __func__); 6880 } 6881 6882 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 6883 .rpc_call_prepare = nfs4_get_lease_time_prepare, 6884 .rpc_call_done = nfs4_get_lease_time_done, 6885 }; 6886 6887 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 6888 { 6889 struct rpc_task *task; 6890 struct nfs4_get_lease_time_args args; 6891 struct nfs4_get_lease_time_res res = { 6892 .lr_fsinfo = fsinfo, 6893 }; 6894 struct nfs4_get_lease_time_data data = { 6895 .args = &args, 6896 .res = &res, 6897 .clp = clp, 6898 }; 6899 struct rpc_message msg = { 6900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 6901 .rpc_argp = &args, 6902 .rpc_resp = &res, 6903 }; 6904 struct rpc_task_setup task_setup = { 6905 .rpc_client = clp->cl_rpcclient, 6906 .rpc_message = &msg, 6907 .callback_ops = &nfs4_get_lease_time_ops, 6908 .callback_data = &data, 6909 .flags = RPC_TASK_TIMEOUT, 6910 }; 6911 int status; 6912 6913 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0); 6914 nfs4_set_sequence_privileged(&args.la_seq_args); 6915 dprintk("--> %s\n", __func__); 6916 task = rpc_run_task(&task_setup); 6917 6918 if (IS_ERR(task)) 6919 status = PTR_ERR(task); 6920 else { 6921 status = task->tk_status; 6922 rpc_put_task(task); 6923 } 6924 dprintk("<-- %s return %d\n", __func__, status); 6925 6926 return status; 6927 } 6928 6929 /* 6930 * Initialize the values to be used by the client in CREATE_SESSION 6931 * If nfs4_init_session set the fore channel request and response sizes, 6932 * use them. 6933 * 6934 * Set the back channel max_resp_sz_cached to zero to force the client to 6935 * always set csa_cachethis to FALSE because the current implementation 6936 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 6937 */ 6938 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) 6939 { 6940 unsigned int max_rqst_sz, max_resp_sz; 6941 6942 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 6943 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 6944 6945 /* Fore channel attributes */ 6946 args->fc_attrs.max_rqst_sz = max_rqst_sz; 6947 args->fc_attrs.max_resp_sz = max_resp_sz; 6948 args->fc_attrs.max_ops = NFS4_MAX_OPS; 6949 args->fc_attrs.max_reqs = max_session_slots; 6950 6951 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 6952 "max_ops=%u max_reqs=%u\n", 6953 __func__, 6954 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 6955 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 6956 6957 /* Back channel attributes */ 6958 args->bc_attrs.max_rqst_sz = PAGE_SIZE; 6959 args->bc_attrs.max_resp_sz = PAGE_SIZE; 6960 args->bc_attrs.max_resp_sz_cached = 0; 6961 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 6962 args->bc_attrs.max_reqs = 1; 6963 6964 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 6965 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 6966 __func__, 6967 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 6968 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 6969 args->bc_attrs.max_reqs); 6970 } 6971 6972 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session) 6973 { 6974 struct nfs4_channel_attrs *sent = &args->fc_attrs; 6975 struct nfs4_channel_attrs *rcvd = &session->fc_attrs; 6976 6977 if (rcvd->max_resp_sz > sent->max_resp_sz) 6978 return -EINVAL; 6979 /* 6980 * Our requested max_ops is the minimum we need; we're not 6981 * prepared to break up compounds into smaller pieces than that. 6982 * So, no point even trying to continue if the server won't 6983 * cooperate: 6984 */ 6985 if (rcvd->max_ops < sent->max_ops) 6986 return -EINVAL; 6987 if (rcvd->max_reqs == 0) 6988 return -EINVAL; 6989 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 6990 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 6991 return 0; 6992 } 6993 6994 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session) 6995 { 6996 struct nfs4_channel_attrs *sent = &args->bc_attrs; 6997 struct nfs4_channel_attrs *rcvd = &session->bc_attrs; 6998 6999 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 7000 return -EINVAL; 7001 if (rcvd->max_resp_sz < sent->max_resp_sz) 7002 return -EINVAL; 7003 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 7004 return -EINVAL; 7005 /* These would render the backchannel useless: */ 7006 if (rcvd->max_ops != sent->max_ops) 7007 return -EINVAL; 7008 if (rcvd->max_reqs != sent->max_reqs) 7009 return -EINVAL; 7010 return 0; 7011 } 7012 7013 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 7014 struct nfs4_session *session) 7015 { 7016 int ret; 7017 7018 ret = nfs4_verify_fore_channel_attrs(args, session); 7019 if (ret) 7020 return ret; 7021 return nfs4_verify_back_channel_attrs(args, session); 7022 } 7023 7024 static int _nfs4_proc_create_session(struct nfs_client *clp, 7025 struct rpc_cred *cred) 7026 { 7027 struct nfs4_session *session = clp->cl_session; 7028 struct nfs41_create_session_args args = { 7029 .client = clp, 7030 .cb_program = NFS4_CALLBACK, 7031 }; 7032 struct nfs41_create_session_res res = { 7033 .client = clp, 7034 }; 7035 struct rpc_message msg = { 7036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 7037 .rpc_argp = &args, 7038 .rpc_resp = &res, 7039 .rpc_cred = cred, 7040 }; 7041 int status; 7042 7043 nfs4_init_channel_attrs(&args); 7044 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 7045 7046 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 7047 trace_nfs4_create_session(clp, status); 7048 7049 if (!status) { 7050 /* Verify the session's negotiated channel_attrs values */ 7051 status = nfs4_verify_channel_attrs(&args, session); 7052 /* Increment the clientid slot sequence id */ 7053 clp->cl_seqid++; 7054 } 7055 7056 return status; 7057 } 7058 7059 /* 7060 * Issues a CREATE_SESSION operation to the server. 7061 * It is the responsibility of the caller to verify the session is 7062 * expired before calling this routine. 7063 */ 7064 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred) 7065 { 7066 int status; 7067 unsigned *ptr; 7068 struct nfs4_session *session = clp->cl_session; 7069 7070 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 7071 7072 status = _nfs4_proc_create_session(clp, cred); 7073 if (status) 7074 goto out; 7075 7076 /* Init or reset the session slot tables */ 7077 status = nfs4_setup_session_slot_tables(session); 7078 dprintk("slot table setup returned %d\n", status); 7079 if (status) 7080 goto out; 7081 7082 ptr = (unsigned *)&session->sess_id.data[0]; 7083 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 7084 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 7085 out: 7086 dprintk("<-- %s\n", __func__); 7087 return status; 7088 } 7089 7090 /* 7091 * Issue the over-the-wire RPC DESTROY_SESSION. 7092 * The caller must serialize access to this routine. 7093 */ 7094 int nfs4_proc_destroy_session(struct nfs4_session *session, 7095 struct rpc_cred *cred) 7096 { 7097 struct rpc_message msg = { 7098 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 7099 .rpc_argp = session, 7100 .rpc_cred = cred, 7101 }; 7102 int status = 0; 7103 7104 dprintk("--> nfs4_proc_destroy_session\n"); 7105 7106 /* session is still being setup */ 7107 if (session->clp->cl_cons_state != NFS_CS_READY) 7108 return status; 7109 7110 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 7111 trace_nfs4_destroy_session(session->clp, status); 7112 7113 if (status) 7114 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 7115 "Session has been destroyed regardless...\n", status); 7116 7117 dprintk("<-- nfs4_proc_destroy_session\n"); 7118 return status; 7119 } 7120 7121 /* 7122 * Renew the cl_session lease. 7123 */ 7124 struct nfs4_sequence_data { 7125 struct nfs_client *clp; 7126 struct nfs4_sequence_args args; 7127 struct nfs4_sequence_res res; 7128 }; 7129 7130 static void nfs41_sequence_release(void *data) 7131 { 7132 struct nfs4_sequence_data *calldata = data; 7133 struct nfs_client *clp = calldata->clp; 7134 7135 if (atomic_read(&clp->cl_count) > 1) 7136 nfs4_schedule_state_renewal(clp); 7137 nfs_put_client(clp); 7138 kfree(calldata); 7139 } 7140 7141 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 7142 { 7143 switch(task->tk_status) { 7144 case -NFS4ERR_DELAY: 7145 rpc_delay(task, NFS4_POLL_RETRY_MAX); 7146 return -EAGAIN; 7147 default: 7148 nfs4_schedule_lease_recovery(clp); 7149 } 7150 return 0; 7151 } 7152 7153 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 7154 { 7155 struct nfs4_sequence_data *calldata = data; 7156 struct nfs_client *clp = calldata->clp; 7157 7158 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 7159 return; 7160 7161 trace_nfs4_sequence(clp, task->tk_status); 7162 if (task->tk_status < 0) { 7163 dprintk("%s ERROR %d\n", __func__, task->tk_status); 7164 if (atomic_read(&clp->cl_count) == 1) 7165 goto out; 7166 7167 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 7168 rpc_restart_call_prepare(task); 7169 return; 7170 } 7171 } 7172 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 7173 out: 7174 dprintk("<-- %s\n", __func__); 7175 } 7176 7177 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 7178 { 7179 struct nfs4_sequence_data *calldata = data; 7180 struct nfs_client *clp = calldata->clp; 7181 struct nfs4_sequence_args *args; 7182 struct nfs4_sequence_res *res; 7183 7184 args = task->tk_msg.rpc_argp; 7185 res = task->tk_msg.rpc_resp; 7186 7187 nfs41_setup_sequence(clp->cl_session, args, res, task); 7188 } 7189 7190 static const struct rpc_call_ops nfs41_sequence_ops = { 7191 .rpc_call_done = nfs41_sequence_call_done, 7192 .rpc_call_prepare = nfs41_sequence_prepare, 7193 .rpc_release = nfs41_sequence_release, 7194 }; 7195 7196 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 7197 struct rpc_cred *cred, 7198 bool is_privileged) 7199 { 7200 struct nfs4_sequence_data *calldata; 7201 struct rpc_message msg = { 7202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 7203 .rpc_cred = cred, 7204 }; 7205 struct rpc_task_setup task_setup_data = { 7206 .rpc_client = clp->cl_rpcclient, 7207 .rpc_message = &msg, 7208 .callback_ops = &nfs41_sequence_ops, 7209 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 7210 }; 7211 7212 if (!atomic_inc_not_zero(&clp->cl_count)) 7213 return ERR_PTR(-EIO); 7214 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 7215 if (calldata == NULL) { 7216 nfs_put_client(clp); 7217 return ERR_PTR(-ENOMEM); 7218 } 7219 nfs4_init_sequence(&calldata->args, &calldata->res, 0); 7220 if (is_privileged) 7221 nfs4_set_sequence_privileged(&calldata->args); 7222 msg.rpc_argp = &calldata->args; 7223 msg.rpc_resp = &calldata->res; 7224 calldata->clp = clp; 7225 task_setup_data.callback_data = calldata; 7226 7227 return rpc_run_task(&task_setup_data); 7228 } 7229 7230 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) 7231 { 7232 struct rpc_task *task; 7233 int ret = 0; 7234 7235 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 7236 return 0; 7237 task = _nfs41_proc_sequence(clp, cred, false); 7238 if (IS_ERR(task)) 7239 ret = PTR_ERR(task); 7240 else 7241 rpc_put_task_async(task); 7242 dprintk("<-- %s status=%d\n", __func__, ret); 7243 return ret; 7244 } 7245 7246 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) 7247 { 7248 struct rpc_task *task; 7249 int ret; 7250 7251 task = _nfs41_proc_sequence(clp, cred, true); 7252 if (IS_ERR(task)) { 7253 ret = PTR_ERR(task); 7254 goto out; 7255 } 7256 ret = rpc_wait_for_completion_task(task); 7257 if (!ret) { 7258 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp; 7259 7260 if (task->tk_status == 0) 7261 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); 7262 ret = task->tk_status; 7263 } 7264 rpc_put_task(task); 7265 out: 7266 dprintk("<-- %s status=%d\n", __func__, ret); 7267 return ret; 7268 } 7269 7270 struct nfs4_reclaim_complete_data { 7271 struct nfs_client *clp; 7272 struct nfs41_reclaim_complete_args arg; 7273 struct nfs41_reclaim_complete_res res; 7274 }; 7275 7276 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 7277 { 7278 struct nfs4_reclaim_complete_data *calldata = data; 7279 7280 nfs41_setup_sequence(calldata->clp->cl_session, 7281 &calldata->arg.seq_args, 7282 &calldata->res.seq_res, 7283 task); 7284 } 7285 7286 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 7287 { 7288 switch(task->tk_status) { 7289 case 0: 7290 case -NFS4ERR_COMPLETE_ALREADY: 7291 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 7292 break; 7293 case -NFS4ERR_DELAY: 7294 rpc_delay(task, NFS4_POLL_RETRY_MAX); 7295 /* fall through */ 7296 case -NFS4ERR_RETRY_UNCACHED_REP: 7297 return -EAGAIN; 7298 default: 7299 nfs4_schedule_lease_recovery(clp); 7300 } 7301 return 0; 7302 } 7303 7304 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 7305 { 7306 struct nfs4_reclaim_complete_data *calldata = data; 7307 struct nfs_client *clp = calldata->clp; 7308 struct nfs4_sequence_res *res = &calldata->res.seq_res; 7309 7310 dprintk("--> %s\n", __func__); 7311 if (!nfs41_sequence_done(task, res)) 7312 return; 7313 7314 trace_nfs4_reclaim_complete(clp, task->tk_status); 7315 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 7316 rpc_restart_call_prepare(task); 7317 return; 7318 } 7319 dprintk("<-- %s\n", __func__); 7320 } 7321 7322 static void nfs4_free_reclaim_complete_data(void *data) 7323 { 7324 struct nfs4_reclaim_complete_data *calldata = data; 7325 7326 kfree(calldata); 7327 } 7328 7329 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 7330 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 7331 .rpc_call_done = nfs4_reclaim_complete_done, 7332 .rpc_release = nfs4_free_reclaim_complete_data, 7333 }; 7334 7335 /* 7336 * Issue a global reclaim complete. 7337 */ 7338 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 7339 struct rpc_cred *cred) 7340 { 7341 struct nfs4_reclaim_complete_data *calldata; 7342 struct rpc_task *task; 7343 struct rpc_message msg = { 7344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 7345 .rpc_cred = cred, 7346 }; 7347 struct rpc_task_setup task_setup_data = { 7348 .rpc_client = clp->cl_rpcclient, 7349 .rpc_message = &msg, 7350 .callback_ops = &nfs4_reclaim_complete_call_ops, 7351 .flags = RPC_TASK_ASYNC, 7352 }; 7353 int status = -ENOMEM; 7354 7355 dprintk("--> %s\n", __func__); 7356 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 7357 if (calldata == NULL) 7358 goto out; 7359 calldata->clp = clp; 7360 calldata->arg.one_fs = 0; 7361 7362 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0); 7363 nfs4_set_sequence_privileged(&calldata->arg.seq_args); 7364 msg.rpc_argp = &calldata->arg; 7365 msg.rpc_resp = &calldata->res; 7366 task_setup_data.callback_data = calldata; 7367 task = rpc_run_task(&task_setup_data); 7368 if (IS_ERR(task)) { 7369 status = PTR_ERR(task); 7370 goto out; 7371 } 7372 status = nfs4_wait_for_completion_rpc_task(task); 7373 if (status == 0) 7374 status = task->tk_status; 7375 rpc_put_task(task); 7376 return 0; 7377 out: 7378 dprintk("<-- %s status=%d\n", __func__, status); 7379 return status; 7380 } 7381 7382 static void 7383 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 7384 { 7385 struct nfs4_layoutget *lgp = calldata; 7386 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 7387 struct nfs4_session *session = nfs4_get_session(server); 7388 7389 dprintk("--> %s\n", __func__); 7390 /* Note the is a race here, where a CB_LAYOUTRECALL can come in 7391 * right now covering the LAYOUTGET we are about to send. 7392 * However, that is not so catastrophic, and there seems 7393 * to be no way to prevent it completely. 7394 */ 7395 if (nfs41_setup_sequence(session, &lgp->args.seq_args, 7396 &lgp->res.seq_res, task)) 7397 return; 7398 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid, 7399 NFS_I(lgp->args.inode)->layout, 7400 lgp->args.ctx->state)) { 7401 rpc_exit(task, NFS4_OK); 7402 } 7403 } 7404 7405 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 7406 { 7407 struct nfs4_layoutget *lgp = calldata; 7408 struct inode *inode = lgp->args.inode; 7409 struct nfs_server *server = NFS_SERVER(inode); 7410 struct pnfs_layout_hdr *lo; 7411 struct nfs4_state *state = NULL; 7412 unsigned long timeo, giveup; 7413 7414 dprintk("--> %s\n", __func__); 7415 7416 if (!nfs41_sequence_done(task, &lgp->res.seq_res)) 7417 goto out; 7418 7419 switch (task->tk_status) { 7420 case 0: 7421 goto out; 7422 case -NFS4ERR_LAYOUTTRYLATER: 7423 case -NFS4ERR_RECALLCONFLICT: 7424 timeo = rpc_get_timeout(task->tk_client); 7425 giveup = lgp->args.timestamp + timeo; 7426 if (time_after(giveup, jiffies)) 7427 task->tk_status = -NFS4ERR_DELAY; 7428 break; 7429 case -NFS4ERR_EXPIRED: 7430 case -NFS4ERR_BAD_STATEID: 7431 spin_lock(&inode->i_lock); 7432 lo = NFS_I(inode)->layout; 7433 if (!lo || list_empty(&lo->plh_segs)) { 7434 spin_unlock(&inode->i_lock); 7435 /* If the open stateid was bad, then recover it. */ 7436 state = lgp->args.ctx->state; 7437 } else { 7438 LIST_HEAD(head); 7439 7440 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL); 7441 spin_unlock(&inode->i_lock); 7442 /* Mark the bad layout state as invalid, then 7443 * retry using the open stateid. */ 7444 pnfs_free_lseg_list(&head); 7445 } 7446 } 7447 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) 7448 rpc_restart_call_prepare(task); 7449 out: 7450 dprintk("<-- %s\n", __func__); 7451 } 7452 7453 static size_t max_response_pages(struct nfs_server *server) 7454 { 7455 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 7456 return nfs_page_array_len(0, max_resp_sz); 7457 } 7458 7459 static void nfs4_free_pages(struct page **pages, size_t size) 7460 { 7461 int i; 7462 7463 if (!pages) 7464 return; 7465 7466 for (i = 0; i < size; i++) { 7467 if (!pages[i]) 7468 break; 7469 __free_page(pages[i]); 7470 } 7471 kfree(pages); 7472 } 7473 7474 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags) 7475 { 7476 struct page **pages; 7477 int i; 7478 7479 pages = kcalloc(size, sizeof(struct page *), gfp_flags); 7480 if (!pages) { 7481 dprintk("%s: can't alloc array of %zu pages\n", __func__, size); 7482 return NULL; 7483 } 7484 7485 for (i = 0; i < size; i++) { 7486 pages[i] = alloc_page(gfp_flags); 7487 if (!pages[i]) { 7488 dprintk("%s: failed to allocate page\n", __func__); 7489 nfs4_free_pages(pages, size); 7490 return NULL; 7491 } 7492 } 7493 7494 return pages; 7495 } 7496 7497 static void nfs4_layoutget_release(void *calldata) 7498 { 7499 struct nfs4_layoutget *lgp = calldata; 7500 struct inode *inode = lgp->args.inode; 7501 struct nfs_server *server = NFS_SERVER(inode); 7502 size_t max_pages = max_response_pages(server); 7503 7504 dprintk("--> %s\n", __func__); 7505 nfs4_free_pages(lgp->args.layout.pages, max_pages); 7506 pnfs_put_layout_hdr(NFS_I(inode)->layout); 7507 put_nfs_open_context(lgp->args.ctx); 7508 kfree(calldata); 7509 dprintk("<-- %s\n", __func__); 7510 } 7511 7512 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 7513 .rpc_call_prepare = nfs4_layoutget_prepare, 7514 .rpc_call_done = nfs4_layoutget_done, 7515 .rpc_release = nfs4_layoutget_release, 7516 }; 7517 7518 struct pnfs_layout_segment * 7519 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags) 7520 { 7521 struct inode *inode = lgp->args.inode; 7522 struct nfs_server *server = NFS_SERVER(inode); 7523 size_t max_pages = max_response_pages(server); 7524 struct rpc_task *task; 7525 struct rpc_message msg = { 7526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 7527 .rpc_argp = &lgp->args, 7528 .rpc_resp = &lgp->res, 7529 .rpc_cred = lgp->cred, 7530 }; 7531 struct rpc_task_setup task_setup_data = { 7532 .rpc_client = server->client, 7533 .rpc_message = &msg, 7534 .callback_ops = &nfs4_layoutget_call_ops, 7535 .callback_data = lgp, 7536 .flags = RPC_TASK_ASYNC, 7537 }; 7538 struct pnfs_layout_segment *lseg = NULL; 7539 int status = 0; 7540 7541 dprintk("--> %s\n", __func__); 7542 7543 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags); 7544 if (!lgp->args.layout.pages) { 7545 nfs4_layoutget_release(lgp); 7546 return ERR_PTR(-ENOMEM); 7547 } 7548 lgp->args.layout.pglen = max_pages * PAGE_SIZE; 7549 lgp->args.timestamp = jiffies; 7550 7551 lgp->res.layoutp = &lgp->args.layout; 7552 lgp->res.seq_res.sr_slot = NULL; 7553 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0); 7554 7555 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ 7556 pnfs_get_layout_hdr(NFS_I(inode)->layout); 7557 7558 task = rpc_run_task(&task_setup_data); 7559 if (IS_ERR(task)) 7560 return ERR_CAST(task); 7561 status = nfs4_wait_for_completion_rpc_task(task); 7562 if (status == 0) 7563 status = task->tk_status; 7564 trace_nfs4_layoutget(lgp->args.ctx, 7565 &lgp->args.range, 7566 &lgp->res.range, 7567 status); 7568 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */ 7569 if (status == 0 && lgp->res.layoutp->len) 7570 lseg = pnfs_layout_process(lgp); 7571 rpc_put_task(task); 7572 dprintk("<-- %s status=%d\n", __func__, status); 7573 if (status) 7574 return ERR_PTR(status); 7575 return lseg; 7576 } 7577 7578 static void 7579 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 7580 { 7581 struct nfs4_layoutreturn *lrp = calldata; 7582 7583 dprintk("--> %s\n", __func__); 7584 nfs41_setup_sequence(lrp->clp->cl_session, 7585 &lrp->args.seq_args, 7586 &lrp->res.seq_res, 7587 task); 7588 } 7589 7590 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 7591 { 7592 struct nfs4_layoutreturn *lrp = calldata; 7593 struct nfs_server *server; 7594 7595 dprintk("--> %s\n", __func__); 7596 7597 if (!nfs41_sequence_done(task, &lrp->res.seq_res)) 7598 return; 7599 7600 server = NFS_SERVER(lrp->args.inode); 7601 switch (task->tk_status) { 7602 default: 7603 task->tk_status = 0; 7604 case 0: 7605 break; 7606 case -NFS4ERR_DELAY: 7607 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN) 7608 break; 7609 rpc_restart_call_prepare(task); 7610 return; 7611 } 7612 dprintk("<-- %s\n", __func__); 7613 } 7614 7615 static void nfs4_layoutreturn_release(void *calldata) 7616 { 7617 struct nfs4_layoutreturn *lrp = calldata; 7618 struct pnfs_layout_hdr *lo = lrp->args.layout; 7619 7620 dprintk("--> %s\n", __func__); 7621 spin_lock(&lo->plh_inode->i_lock); 7622 if (lrp->res.lrs_present) 7623 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true); 7624 lo->plh_block_lgets--; 7625 spin_unlock(&lo->plh_inode->i_lock); 7626 pnfs_put_layout_hdr(lrp->args.layout); 7627 kfree(calldata); 7628 dprintk("<-- %s\n", __func__); 7629 } 7630 7631 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 7632 .rpc_call_prepare = nfs4_layoutreturn_prepare, 7633 .rpc_call_done = nfs4_layoutreturn_done, 7634 .rpc_release = nfs4_layoutreturn_release, 7635 }; 7636 7637 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp) 7638 { 7639 struct rpc_task *task; 7640 struct rpc_message msg = { 7641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 7642 .rpc_argp = &lrp->args, 7643 .rpc_resp = &lrp->res, 7644 .rpc_cred = lrp->cred, 7645 }; 7646 struct rpc_task_setup task_setup_data = { 7647 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 7648 .rpc_message = &msg, 7649 .callback_ops = &nfs4_layoutreturn_call_ops, 7650 .callback_data = lrp, 7651 }; 7652 int status; 7653 7654 dprintk("--> %s\n", __func__); 7655 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1); 7656 task = rpc_run_task(&task_setup_data); 7657 if (IS_ERR(task)) 7658 return PTR_ERR(task); 7659 status = task->tk_status; 7660 trace_nfs4_layoutreturn(lrp->args.inode, status); 7661 dprintk("<-- %s status=%d\n", __func__, status); 7662 rpc_put_task(task); 7663 return status; 7664 } 7665 7666 /* 7667 * Retrieve the list of Data Server devices from the MDS. 7668 */ 7669 static int _nfs4_getdevicelist(struct nfs_server *server, 7670 const struct nfs_fh *fh, 7671 struct pnfs_devicelist *devlist) 7672 { 7673 struct nfs4_getdevicelist_args args = { 7674 .fh = fh, 7675 .layoutclass = server->pnfs_curr_ld->id, 7676 }; 7677 struct nfs4_getdevicelist_res res = { 7678 .devlist = devlist, 7679 }; 7680 struct rpc_message msg = { 7681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST], 7682 .rpc_argp = &args, 7683 .rpc_resp = &res, 7684 }; 7685 int status; 7686 7687 dprintk("--> %s\n", __func__); 7688 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 7689 &res.seq_res, 0); 7690 dprintk("<-- %s status=%d\n", __func__, status); 7691 return status; 7692 } 7693 7694 int nfs4_proc_getdevicelist(struct nfs_server *server, 7695 const struct nfs_fh *fh, 7696 struct pnfs_devicelist *devlist) 7697 { 7698 struct nfs4_exception exception = { }; 7699 int err; 7700 7701 do { 7702 err = nfs4_handle_exception(server, 7703 _nfs4_getdevicelist(server, fh, devlist), 7704 &exception); 7705 } while (exception.retry); 7706 7707 dprintk("%s: err=%d, num_devs=%u\n", __func__, 7708 err, devlist->num_devs); 7709 7710 return err; 7711 } 7712 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist); 7713 7714 static int 7715 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 7716 struct pnfs_device *pdev, 7717 struct rpc_cred *cred) 7718 { 7719 struct nfs4_getdeviceinfo_args args = { 7720 .pdev = pdev, 7721 }; 7722 struct nfs4_getdeviceinfo_res res = { 7723 .pdev = pdev, 7724 }; 7725 struct rpc_message msg = { 7726 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 7727 .rpc_argp = &args, 7728 .rpc_resp = &res, 7729 .rpc_cred = cred, 7730 }; 7731 int status; 7732 7733 dprintk("--> %s\n", __func__); 7734 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 7735 dprintk("<-- %s status=%d\n", __func__, status); 7736 7737 return status; 7738 } 7739 7740 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 7741 struct pnfs_device *pdev, 7742 struct rpc_cred *cred) 7743 { 7744 struct nfs4_exception exception = { }; 7745 int err; 7746 7747 do { 7748 err = nfs4_handle_exception(server, 7749 _nfs4_proc_getdeviceinfo(server, pdev, cred), 7750 &exception); 7751 } while (exception.retry); 7752 return err; 7753 } 7754 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 7755 7756 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 7757 { 7758 struct nfs4_layoutcommit_data *data = calldata; 7759 struct nfs_server *server = NFS_SERVER(data->args.inode); 7760 struct nfs4_session *session = nfs4_get_session(server); 7761 7762 nfs41_setup_sequence(session, 7763 &data->args.seq_args, 7764 &data->res.seq_res, 7765 task); 7766 } 7767 7768 static void 7769 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 7770 { 7771 struct nfs4_layoutcommit_data *data = calldata; 7772 struct nfs_server *server = NFS_SERVER(data->args.inode); 7773 7774 if (!nfs41_sequence_done(task, &data->res.seq_res)) 7775 return; 7776 7777 switch (task->tk_status) { /* Just ignore these failures */ 7778 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 7779 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 7780 case -NFS4ERR_BADLAYOUT: /* no layout */ 7781 case -NFS4ERR_GRACE: /* loca_recalim always false */ 7782 task->tk_status = 0; 7783 break; 7784 case 0: 7785 nfs_post_op_update_inode_force_wcc(data->args.inode, 7786 data->res.fattr); 7787 break; 7788 default: 7789 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { 7790 rpc_restart_call_prepare(task); 7791 return; 7792 } 7793 } 7794 } 7795 7796 static void nfs4_layoutcommit_release(void *calldata) 7797 { 7798 struct nfs4_layoutcommit_data *data = calldata; 7799 7800 pnfs_cleanup_layoutcommit(data); 7801 put_rpccred(data->cred); 7802 kfree(data); 7803 } 7804 7805 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 7806 .rpc_call_prepare = nfs4_layoutcommit_prepare, 7807 .rpc_call_done = nfs4_layoutcommit_done, 7808 .rpc_release = nfs4_layoutcommit_release, 7809 }; 7810 7811 int 7812 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 7813 { 7814 struct rpc_message msg = { 7815 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 7816 .rpc_argp = &data->args, 7817 .rpc_resp = &data->res, 7818 .rpc_cred = data->cred, 7819 }; 7820 struct rpc_task_setup task_setup_data = { 7821 .task = &data->task, 7822 .rpc_client = NFS_CLIENT(data->args.inode), 7823 .rpc_message = &msg, 7824 .callback_ops = &nfs4_layoutcommit_ops, 7825 .callback_data = data, 7826 .flags = RPC_TASK_ASYNC, 7827 }; 7828 struct rpc_task *task; 7829 int status = 0; 7830 7831 dprintk("NFS: %4d initiating layoutcommit call. sync %d " 7832 "lbw: %llu inode %lu\n", 7833 data->task.tk_pid, sync, 7834 data->args.lastbytewritten, 7835 data->args.inode->i_ino); 7836 7837 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 7838 task = rpc_run_task(&task_setup_data); 7839 if (IS_ERR(task)) 7840 return PTR_ERR(task); 7841 if (sync == false) 7842 goto out; 7843 status = nfs4_wait_for_completion_rpc_task(task); 7844 if (status != 0) 7845 goto out; 7846 status = task->tk_status; 7847 trace_nfs4_layoutcommit(data->args.inode, status); 7848 out: 7849 dprintk("%s: status %d\n", __func__, status); 7850 rpc_put_task(task); 7851 return status; 7852 } 7853 7854 /** 7855 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 7856 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 7857 */ 7858 static int 7859 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 7860 struct nfs_fsinfo *info, 7861 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 7862 { 7863 struct nfs41_secinfo_no_name_args args = { 7864 .style = SECINFO_STYLE_CURRENT_FH, 7865 }; 7866 struct nfs4_secinfo_res res = { 7867 .flavors = flavors, 7868 }; 7869 struct rpc_message msg = { 7870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 7871 .rpc_argp = &args, 7872 .rpc_resp = &res, 7873 }; 7874 struct rpc_clnt *clnt = server->client; 7875 struct rpc_cred *cred = NULL; 7876 int status; 7877 7878 if (use_integrity) { 7879 clnt = server->nfs_client->cl_rpcclient; 7880 cred = nfs4_get_clid_cred(server->nfs_client); 7881 msg.rpc_cred = cred; 7882 } 7883 7884 dprintk("--> %s\n", __func__); 7885 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 7886 &res.seq_res, 0); 7887 dprintk("<-- %s status=%d\n", __func__, status); 7888 7889 if (cred) 7890 put_rpccred(cred); 7891 7892 return status; 7893 } 7894 7895 static int 7896 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 7897 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 7898 { 7899 struct nfs4_exception exception = { }; 7900 int err; 7901 do { 7902 /* first try using integrity protection */ 7903 err = -NFS4ERR_WRONGSEC; 7904 7905 /* try to use integrity protection with machine cred */ 7906 if (_nfs4_is_integrity_protected(server->nfs_client)) 7907 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 7908 flavors, true); 7909 7910 /* 7911 * if unable to use integrity protection, or SECINFO with 7912 * integrity protection returns NFS4ERR_WRONGSEC (which is 7913 * disallowed by spec, but exists in deployed servers) use 7914 * the current filesystem's rpc_client and the user cred. 7915 */ 7916 if (err == -NFS4ERR_WRONGSEC) 7917 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 7918 flavors, false); 7919 7920 switch (err) { 7921 case 0: 7922 case -NFS4ERR_WRONGSEC: 7923 case -NFS4ERR_NOTSUPP: 7924 goto out; 7925 default: 7926 err = nfs4_handle_exception(server, err, &exception); 7927 } 7928 } while (exception.retry); 7929 out: 7930 return err; 7931 } 7932 7933 static int 7934 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 7935 struct nfs_fsinfo *info) 7936 { 7937 int err; 7938 struct page *page; 7939 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 7940 struct nfs4_secinfo_flavors *flavors; 7941 struct nfs4_secinfo4 *secinfo; 7942 int i; 7943 7944 page = alloc_page(GFP_KERNEL); 7945 if (!page) { 7946 err = -ENOMEM; 7947 goto out; 7948 } 7949 7950 flavors = page_address(page); 7951 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 7952 7953 /* 7954 * Fall back on "guess and check" method if 7955 * the server doesn't support SECINFO_NO_NAME 7956 */ 7957 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) { 7958 err = nfs4_find_root_sec(server, fhandle, info); 7959 goto out_freepage; 7960 } 7961 if (err) 7962 goto out_freepage; 7963 7964 for (i = 0; i < flavors->num_flavors; i++) { 7965 secinfo = &flavors->flavors[i]; 7966 7967 switch (secinfo->flavor) { 7968 case RPC_AUTH_NULL: 7969 case RPC_AUTH_UNIX: 7970 case RPC_AUTH_GSS: 7971 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 7972 &secinfo->flavor_info); 7973 break; 7974 default: 7975 flavor = RPC_AUTH_MAXFLAVOR; 7976 break; 7977 } 7978 7979 if (!nfs_auth_info_match(&server->auth_info, flavor)) 7980 flavor = RPC_AUTH_MAXFLAVOR; 7981 7982 if (flavor != RPC_AUTH_MAXFLAVOR) { 7983 err = nfs4_lookup_root_sec(server, fhandle, 7984 info, flavor); 7985 if (!err) 7986 break; 7987 } 7988 } 7989 7990 if (flavor == RPC_AUTH_MAXFLAVOR) 7991 err = -EPERM; 7992 7993 out_freepage: 7994 put_page(page); 7995 if (err == -EACCES) 7996 return -EPERM; 7997 out: 7998 return err; 7999 } 8000 8001 static int _nfs41_test_stateid(struct nfs_server *server, 8002 nfs4_stateid *stateid, 8003 struct rpc_cred *cred) 8004 { 8005 int status; 8006 struct nfs41_test_stateid_args args = { 8007 .stateid = stateid, 8008 }; 8009 struct nfs41_test_stateid_res res; 8010 struct rpc_message msg = { 8011 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 8012 .rpc_argp = &args, 8013 .rpc_resp = &res, 8014 .rpc_cred = cred, 8015 }; 8016 struct rpc_clnt *rpc_client = server->client; 8017 8018 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 8019 &rpc_client, &msg); 8020 8021 dprintk("NFS call test_stateid %p\n", stateid); 8022 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 8023 nfs4_set_sequence_privileged(&args.seq_args); 8024 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 8025 &args.seq_args, &res.seq_res); 8026 if (status != NFS_OK) { 8027 dprintk("NFS reply test_stateid: failed, %d\n", status); 8028 return status; 8029 } 8030 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 8031 return -res.status; 8032 } 8033 8034 /** 8035 * nfs41_test_stateid - perform a TEST_STATEID operation 8036 * 8037 * @server: server / transport on which to perform the operation 8038 * @stateid: state ID to test 8039 * @cred: credential 8040 * 8041 * Returns NFS_OK if the server recognizes that "stateid" is valid. 8042 * Otherwise a negative NFS4ERR value is returned if the operation 8043 * failed or the state ID is not currently valid. 8044 */ 8045 static int nfs41_test_stateid(struct nfs_server *server, 8046 nfs4_stateid *stateid, 8047 struct rpc_cred *cred) 8048 { 8049 struct nfs4_exception exception = { }; 8050 int err; 8051 do { 8052 err = _nfs41_test_stateid(server, stateid, cred); 8053 if (err != -NFS4ERR_DELAY) 8054 break; 8055 nfs4_handle_exception(server, err, &exception); 8056 } while (exception.retry); 8057 return err; 8058 } 8059 8060 struct nfs_free_stateid_data { 8061 struct nfs_server *server; 8062 struct nfs41_free_stateid_args args; 8063 struct nfs41_free_stateid_res res; 8064 }; 8065 8066 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 8067 { 8068 struct nfs_free_stateid_data *data = calldata; 8069 nfs41_setup_sequence(nfs4_get_session(data->server), 8070 &data->args.seq_args, 8071 &data->res.seq_res, 8072 task); 8073 } 8074 8075 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 8076 { 8077 struct nfs_free_stateid_data *data = calldata; 8078 8079 nfs41_sequence_done(task, &data->res.seq_res); 8080 8081 switch (task->tk_status) { 8082 case -NFS4ERR_DELAY: 8083 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN) 8084 rpc_restart_call_prepare(task); 8085 } 8086 } 8087 8088 static void nfs41_free_stateid_release(void *calldata) 8089 { 8090 kfree(calldata); 8091 } 8092 8093 static const struct rpc_call_ops nfs41_free_stateid_ops = { 8094 .rpc_call_prepare = nfs41_free_stateid_prepare, 8095 .rpc_call_done = nfs41_free_stateid_done, 8096 .rpc_release = nfs41_free_stateid_release, 8097 }; 8098 8099 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server, 8100 nfs4_stateid *stateid, 8101 struct rpc_cred *cred, 8102 bool privileged) 8103 { 8104 struct rpc_message msg = { 8105 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 8106 .rpc_cred = cred, 8107 }; 8108 struct rpc_task_setup task_setup = { 8109 .rpc_client = server->client, 8110 .rpc_message = &msg, 8111 .callback_ops = &nfs41_free_stateid_ops, 8112 .flags = RPC_TASK_ASYNC, 8113 }; 8114 struct nfs_free_stateid_data *data; 8115 8116 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 8117 &task_setup.rpc_client, &msg); 8118 8119 dprintk("NFS call free_stateid %p\n", stateid); 8120 data = kmalloc(sizeof(*data), GFP_NOFS); 8121 if (!data) 8122 return ERR_PTR(-ENOMEM); 8123 data->server = server; 8124 nfs4_stateid_copy(&data->args.stateid, stateid); 8125 8126 task_setup.callback_data = data; 8127 8128 msg.rpc_argp = &data->args; 8129 msg.rpc_resp = &data->res; 8130 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 8131 if (privileged) 8132 nfs4_set_sequence_privileged(&data->args.seq_args); 8133 8134 return rpc_run_task(&task_setup); 8135 } 8136 8137 /** 8138 * nfs41_free_stateid - perform a FREE_STATEID operation 8139 * 8140 * @server: server / transport on which to perform the operation 8141 * @stateid: state ID to release 8142 * @cred: credential 8143 * 8144 * Returns NFS_OK if the server freed "stateid". Otherwise a 8145 * negative NFS4ERR value is returned. 8146 */ 8147 static int nfs41_free_stateid(struct nfs_server *server, 8148 nfs4_stateid *stateid, 8149 struct rpc_cred *cred) 8150 { 8151 struct rpc_task *task; 8152 int ret; 8153 8154 task = _nfs41_free_stateid(server, stateid, cred, true); 8155 if (IS_ERR(task)) 8156 return PTR_ERR(task); 8157 ret = rpc_wait_for_completion_task(task); 8158 if (!ret) 8159 ret = task->tk_status; 8160 rpc_put_task(task); 8161 return ret; 8162 } 8163 8164 static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 8165 { 8166 struct rpc_task *task; 8167 struct rpc_cred *cred = lsp->ls_state->owner->so_cred; 8168 8169 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 8170 nfs4_free_lock_state(server, lsp); 8171 if (IS_ERR(task)) 8172 return PTR_ERR(task); 8173 rpc_put_task(task); 8174 return 0; 8175 } 8176 8177 static bool nfs41_match_stateid(const nfs4_stateid *s1, 8178 const nfs4_stateid *s2) 8179 { 8180 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 8181 return false; 8182 8183 if (s1->seqid == s2->seqid) 8184 return true; 8185 if (s1->seqid == 0 || s2->seqid == 0) 8186 return true; 8187 8188 return false; 8189 } 8190 8191 #endif /* CONFIG_NFS_V4_1 */ 8192 8193 static bool nfs4_match_stateid(const nfs4_stateid *s1, 8194 const nfs4_stateid *s2) 8195 { 8196 return nfs4_stateid_match(s1, s2); 8197 } 8198 8199 8200 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 8201 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 8202 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 8203 .recover_open = nfs4_open_reclaim, 8204 .recover_lock = nfs4_lock_reclaim, 8205 .establish_clid = nfs4_init_clientid, 8206 .detect_trunking = nfs40_discover_server_trunking, 8207 }; 8208 8209 #if defined(CONFIG_NFS_V4_1) 8210 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 8211 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 8212 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 8213 .recover_open = nfs4_open_reclaim, 8214 .recover_lock = nfs4_lock_reclaim, 8215 .establish_clid = nfs41_init_clientid, 8216 .reclaim_complete = nfs41_proc_reclaim_complete, 8217 .detect_trunking = nfs41_discover_server_trunking, 8218 }; 8219 #endif /* CONFIG_NFS_V4_1 */ 8220 8221 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 8222 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 8223 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 8224 .recover_open = nfs4_open_expired, 8225 .recover_lock = nfs4_lock_expired, 8226 .establish_clid = nfs4_init_clientid, 8227 }; 8228 8229 #if defined(CONFIG_NFS_V4_1) 8230 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 8231 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 8232 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 8233 .recover_open = nfs41_open_expired, 8234 .recover_lock = nfs41_lock_expired, 8235 .establish_clid = nfs41_init_clientid, 8236 }; 8237 #endif /* CONFIG_NFS_V4_1 */ 8238 8239 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 8240 .sched_state_renewal = nfs4_proc_async_renew, 8241 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, 8242 .renew_lease = nfs4_proc_renew, 8243 }; 8244 8245 #if defined(CONFIG_NFS_V4_1) 8246 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 8247 .sched_state_renewal = nfs41_proc_async_sequence, 8248 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, 8249 .renew_lease = nfs4_proc_sequence, 8250 }; 8251 #endif 8252 8253 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 8254 .get_locations = _nfs40_proc_get_locations, 8255 .fsid_present = _nfs40_proc_fsid_present, 8256 }; 8257 8258 #if defined(CONFIG_NFS_V4_1) 8259 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 8260 .get_locations = _nfs41_proc_get_locations, 8261 .fsid_present = _nfs41_proc_fsid_present, 8262 }; 8263 #endif /* CONFIG_NFS_V4_1 */ 8264 8265 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 8266 .minor_version = 0, 8267 .init_caps = NFS_CAP_READDIRPLUS 8268 | NFS_CAP_ATOMIC_OPEN 8269 | NFS_CAP_CHANGE_ATTR 8270 | NFS_CAP_POSIX_LOCK, 8271 .init_client = nfs40_init_client, 8272 .shutdown_client = nfs40_shutdown_client, 8273 .match_stateid = nfs4_match_stateid, 8274 .find_root_sec = nfs4_find_root_sec, 8275 .free_lock_state = nfs4_release_lockowner, 8276 .call_sync_ops = &nfs40_call_sync_ops, 8277 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 8278 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 8279 .state_renewal_ops = &nfs40_state_renewal_ops, 8280 .mig_recovery_ops = &nfs40_mig_recovery_ops, 8281 }; 8282 8283 #if defined(CONFIG_NFS_V4_1) 8284 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 8285 .minor_version = 1, 8286 .init_caps = NFS_CAP_READDIRPLUS 8287 | NFS_CAP_ATOMIC_OPEN 8288 | NFS_CAP_CHANGE_ATTR 8289 | NFS_CAP_POSIX_LOCK 8290 | NFS_CAP_STATEID_NFSV41 8291 | NFS_CAP_ATOMIC_OPEN_V1, 8292 .init_client = nfs41_init_client, 8293 .shutdown_client = nfs41_shutdown_client, 8294 .match_stateid = nfs41_match_stateid, 8295 .find_root_sec = nfs41_find_root_sec, 8296 .free_lock_state = nfs41_free_lock_state, 8297 .call_sync_ops = &nfs41_call_sync_ops, 8298 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 8299 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 8300 .state_renewal_ops = &nfs41_state_renewal_ops, 8301 .mig_recovery_ops = &nfs41_mig_recovery_ops, 8302 }; 8303 #endif 8304 8305 #if defined(CONFIG_NFS_V4_2) 8306 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 8307 .minor_version = 2, 8308 .init_caps = NFS_CAP_READDIRPLUS 8309 | NFS_CAP_ATOMIC_OPEN 8310 | NFS_CAP_CHANGE_ATTR 8311 | NFS_CAP_POSIX_LOCK 8312 | NFS_CAP_STATEID_NFSV41 8313 | NFS_CAP_ATOMIC_OPEN_V1, 8314 .init_client = nfs41_init_client, 8315 .shutdown_client = nfs41_shutdown_client, 8316 .match_stateid = nfs41_match_stateid, 8317 .find_root_sec = nfs41_find_root_sec, 8318 .free_lock_state = nfs41_free_lock_state, 8319 .call_sync_ops = &nfs41_call_sync_ops, 8320 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 8321 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 8322 .state_renewal_ops = &nfs41_state_renewal_ops, 8323 }; 8324 #endif 8325 8326 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 8327 [0] = &nfs_v4_0_minor_ops, 8328 #if defined(CONFIG_NFS_V4_1) 8329 [1] = &nfs_v4_1_minor_ops, 8330 #endif 8331 #if defined(CONFIG_NFS_V4_2) 8332 [2] = &nfs_v4_2_minor_ops, 8333 #endif 8334 }; 8335 8336 static const struct inode_operations nfs4_dir_inode_operations = { 8337 .create = nfs_create, 8338 .lookup = nfs_lookup, 8339 .atomic_open = nfs_atomic_open, 8340 .link = nfs_link, 8341 .unlink = nfs_unlink, 8342 .symlink = nfs_symlink, 8343 .mkdir = nfs_mkdir, 8344 .rmdir = nfs_rmdir, 8345 .mknod = nfs_mknod, 8346 .rename = nfs_rename, 8347 .permission = nfs_permission, 8348 .getattr = nfs_getattr, 8349 .setattr = nfs_setattr, 8350 .getxattr = generic_getxattr, 8351 .setxattr = generic_setxattr, 8352 .listxattr = generic_listxattr, 8353 .removexattr = generic_removexattr, 8354 }; 8355 8356 static const struct inode_operations nfs4_file_inode_operations = { 8357 .permission = nfs_permission, 8358 .getattr = nfs_getattr, 8359 .setattr = nfs_setattr, 8360 .getxattr = generic_getxattr, 8361 .setxattr = generic_setxattr, 8362 .listxattr = generic_listxattr, 8363 .removexattr = generic_removexattr, 8364 }; 8365 8366 const struct nfs_rpc_ops nfs_v4_clientops = { 8367 .version = 4, /* protocol version */ 8368 .dentry_ops = &nfs4_dentry_operations, 8369 .dir_inode_ops = &nfs4_dir_inode_operations, 8370 .file_inode_ops = &nfs4_file_inode_operations, 8371 .file_ops = &nfs4_file_operations, 8372 .getroot = nfs4_proc_get_root, 8373 .submount = nfs4_submount, 8374 .try_mount = nfs4_try_mount, 8375 .getattr = nfs4_proc_getattr, 8376 .setattr = nfs4_proc_setattr, 8377 .lookup = nfs4_proc_lookup, 8378 .access = nfs4_proc_access, 8379 .readlink = nfs4_proc_readlink, 8380 .create = nfs4_proc_create, 8381 .remove = nfs4_proc_remove, 8382 .unlink_setup = nfs4_proc_unlink_setup, 8383 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 8384 .unlink_done = nfs4_proc_unlink_done, 8385 .rename = nfs4_proc_rename, 8386 .rename_setup = nfs4_proc_rename_setup, 8387 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 8388 .rename_done = nfs4_proc_rename_done, 8389 .link = nfs4_proc_link, 8390 .symlink = nfs4_proc_symlink, 8391 .mkdir = nfs4_proc_mkdir, 8392 .rmdir = nfs4_proc_remove, 8393 .readdir = nfs4_proc_readdir, 8394 .mknod = nfs4_proc_mknod, 8395 .statfs = nfs4_proc_statfs, 8396 .fsinfo = nfs4_proc_fsinfo, 8397 .pathconf = nfs4_proc_pathconf, 8398 .set_capabilities = nfs4_server_capabilities, 8399 .decode_dirent = nfs4_decode_dirent, 8400 .read_setup = nfs4_proc_read_setup, 8401 .read_pageio_init = pnfs_pageio_init_read, 8402 .read_rpc_prepare = nfs4_proc_read_rpc_prepare, 8403 .read_done = nfs4_read_done, 8404 .write_setup = nfs4_proc_write_setup, 8405 .write_pageio_init = pnfs_pageio_init_write, 8406 .write_rpc_prepare = nfs4_proc_write_rpc_prepare, 8407 .write_done = nfs4_write_done, 8408 .commit_setup = nfs4_proc_commit_setup, 8409 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 8410 .commit_done = nfs4_commit_done, 8411 .lock = nfs4_proc_lock, 8412 .clear_acl_cache = nfs4_zap_acl_attr, 8413 .close_context = nfs4_close_context, 8414 .open_context = nfs4_atomic_open, 8415 .have_delegation = nfs4_have_delegation, 8416 .return_delegation = nfs4_inode_return_delegation, 8417 .alloc_client = nfs4_alloc_client, 8418 .init_client = nfs4_init_client, 8419 .free_client = nfs4_free_client, 8420 .create_server = nfs4_create_server, 8421 .clone_server = nfs_clone_server, 8422 }; 8423 8424 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 8425 .prefix = XATTR_NAME_NFSV4_ACL, 8426 .list = nfs4_xattr_list_nfs4_acl, 8427 .get = nfs4_xattr_get_nfs4_acl, 8428 .set = nfs4_xattr_set_nfs4_acl, 8429 }; 8430 8431 const struct xattr_handler *nfs4_xattr_handlers[] = { 8432 &nfs4_xattr_nfs4_acl_handler, 8433 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 8434 &nfs4_xattr_nfs4_label_handler, 8435 #endif 8436 NULL 8437 }; 8438 8439 /* 8440 * Local variables: 8441 * c-basic-offset: 8 8442 * End: 8443 */ 8444