1 /* 2 * fs/nfs/nfs4proc.c 3 * 4 * Client-side procedure declarations for NFSv4. 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <linux/mm.h> 39 #include <linux/delay.h> 40 #include <linux/errno.h> 41 #include <linux/file.h> 42 #include <linux/string.h> 43 #include <linux/ratelimit.h> 44 #include <linux/printk.h> 45 #include <linux/slab.h> 46 #include <linux/sunrpc/clnt.h> 47 #include <linux/nfs.h> 48 #include <linux/nfs4.h> 49 #include <linux/nfs_fs.h> 50 #include <linux/nfs_page.h> 51 #include <linux/nfs_mount.h> 52 #include <linux/namei.h> 53 #include <linux/mount.h> 54 #include <linux/module.h> 55 #include <linux/xattr.h> 56 #include <linux/utsname.h> 57 #include <linux/freezer.h> 58 59 #include "nfs4_fs.h" 60 #include "delegation.h" 61 #include "internal.h" 62 #include "iostat.h" 63 #include "callback.h" 64 #include "pnfs.h" 65 #include "netns.h" 66 #include "nfs4idmap.h" 67 #include "nfs4session.h" 68 #include "fscache.h" 69 70 #include "nfs4trace.h" 71 72 #define NFSDBG_FACILITY NFSDBG_PROC 73 74 #define NFS4_POLL_RETRY_MIN (HZ/10) 75 #define NFS4_POLL_RETRY_MAX (15*HZ) 76 77 struct nfs4_opendata; 78 static int _nfs4_proc_open(struct nfs4_opendata *data); 79 static int _nfs4_recover_proc_open(struct nfs4_opendata *data); 80 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 81 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *); 82 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); 83 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label); 84 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label); 85 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 86 struct nfs_fattr *fattr, struct iattr *sattr, 87 struct nfs4_state *state, struct nfs4_label *ilabel, 88 struct nfs4_label *olabel); 89 #ifdef CONFIG_NFS_V4_1 90 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 91 struct rpc_cred *); 92 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *, 93 struct rpc_cred *); 94 #endif 95 96 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 97 static inline struct nfs4_label * 98 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 99 struct iattr *sattr, struct nfs4_label *label) 100 { 101 int err; 102 103 if (label == NULL) 104 return NULL; 105 106 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 107 return NULL; 108 109 err = security_dentry_init_security(dentry, sattr->ia_mode, 110 &dentry->d_name, (void **)&label->label, &label->len); 111 if (err == 0) 112 return label; 113 114 return NULL; 115 } 116 static inline void 117 nfs4_label_release_security(struct nfs4_label *label) 118 { 119 if (label) 120 security_release_secctx(label->label, label->len); 121 } 122 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 123 { 124 if (label) 125 return server->attr_bitmask; 126 127 return server->attr_bitmask_nl; 128 } 129 #else 130 static inline struct nfs4_label * 131 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 132 struct iattr *sattr, struct nfs4_label *l) 133 { return NULL; } 134 static inline void 135 nfs4_label_release_security(struct nfs4_label *label) 136 { return; } 137 static inline u32 * 138 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 139 { return server->attr_bitmask; } 140 #endif 141 142 /* Prevent leaks of NFSv4 errors into userland */ 143 static int nfs4_map_errors(int err) 144 { 145 if (err >= -1000) 146 return err; 147 switch (err) { 148 case -NFS4ERR_RESOURCE: 149 case -NFS4ERR_LAYOUTTRYLATER: 150 case -NFS4ERR_RECALLCONFLICT: 151 return -EREMOTEIO; 152 case -NFS4ERR_WRONGSEC: 153 case -NFS4ERR_WRONG_CRED: 154 return -EPERM; 155 case -NFS4ERR_BADOWNER: 156 case -NFS4ERR_BADNAME: 157 return -EINVAL; 158 case -NFS4ERR_SHARE_DENIED: 159 return -EACCES; 160 case -NFS4ERR_MINOR_VERS_MISMATCH: 161 return -EPROTONOSUPPORT; 162 case -NFS4ERR_FILE_OPEN: 163 return -EBUSY; 164 default: 165 dprintk("%s could not handle NFSv4 error %d\n", 166 __func__, -err); 167 break; 168 } 169 return -EIO; 170 } 171 172 /* 173 * This is our standard bitmap for GETATTR requests. 174 */ 175 const u32 nfs4_fattr_bitmap[3] = { 176 FATTR4_WORD0_TYPE 177 | FATTR4_WORD0_CHANGE 178 | FATTR4_WORD0_SIZE 179 | FATTR4_WORD0_FSID 180 | FATTR4_WORD0_FILEID, 181 FATTR4_WORD1_MODE 182 | FATTR4_WORD1_NUMLINKS 183 | FATTR4_WORD1_OWNER 184 | FATTR4_WORD1_OWNER_GROUP 185 | FATTR4_WORD1_RAWDEV 186 | FATTR4_WORD1_SPACE_USED 187 | FATTR4_WORD1_TIME_ACCESS 188 | FATTR4_WORD1_TIME_METADATA 189 | FATTR4_WORD1_TIME_MODIFY 190 | FATTR4_WORD1_MOUNTED_ON_FILEID, 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(d_inode(dentry))); 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(d_inode(dentry->d_parent))); 311 312 readdir->pgbase = (char *)p - (char *)start; 313 readdir->count -= readdir->pgbase; 314 kunmap_atomic(start); 315 } 316 317 static long nfs4_update_delay(long *timeout) 318 { 319 long ret; 320 if (!timeout) 321 return NFS4_POLL_RETRY_MAX; 322 if (*timeout <= 0) 323 *timeout = NFS4_POLL_RETRY_MIN; 324 if (*timeout > NFS4_POLL_RETRY_MAX) 325 *timeout = NFS4_POLL_RETRY_MAX; 326 ret = *timeout; 327 *timeout <<= 1; 328 return ret; 329 } 330 331 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) 332 { 333 int res = 0; 334 335 might_sleep(); 336 337 freezable_schedule_timeout_killable_unsafe( 338 nfs4_update_delay(timeout)); 339 if (fatal_signal_pending(current)) 340 res = -ERESTARTSYS; 341 return res; 342 } 343 344 /* This is the error handling routine for processes that are allowed 345 * to sleep. 346 */ 347 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 348 { 349 struct nfs_client *clp = server->nfs_client; 350 struct nfs4_state *state = exception->state; 351 struct inode *inode = exception->inode; 352 int ret = errorcode; 353 354 exception->retry = 0; 355 switch(errorcode) { 356 case 0: 357 return 0; 358 case -NFS4ERR_OPENMODE: 359 case -NFS4ERR_DELEG_REVOKED: 360 case -NFS4ERR_ADMIN_REVOKED: 361 case -NFS4ERR_BAD_STATEID: 362 if (inode && nfs4_have_delegation(inode, FMODE_READ)) { 363 nfs4_inode_return_delegation(inode); 364 exception->retry = 1; 365 return 0; 366 } 367 if (state == NULL) 368 break; 369 ret = nfs4_schedule_stateid_recovery(server, state); 370 if (ret < 0) 371 break; 372 goto wait_on_recovery; 373 case -NFS4ERR_EXPIRED: 374 if (state != NULL) { 375 ret = nfs4_schedule_stateid_recovery(server, state); 376 if (ret < 0) 377 break; 378 } 379 case -NFS4ERR_STALE_STATEID: 380 case -NFS4ERR_STALE_CLIENTID: 381 nfs4_schedule_lease_recovery(clp); 382 goto wait_on_recovery; 383 case -NFS4ERR_MOVED: 384 ret = nfs4_schedule_migration_recovery(server); 385 if (ret < 0) 386 break; 387 goto wait_on_recovery; 388 case -NFS4ERR_LEASE_MOVED: 389 nfs4_schedule_lease_moved_recovery(clp); 390 goto wait_on_recovery; 391 #if defined(CONFIG_NFS_V4_1) 392 case -NFS4ERR_BADSESSION: 393 case -NFS4ERR_BADSLOT: 394 case -NFS4ERR_BAD_HIGH_SLOT: 395 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 396 case -NFS4ERR_DEADSESSION: 397 case -NFS4ERR_SEQ_FALSE_RETRY: 398 case -NFS4ERR_SEQ_MISORDERED: 399 dprintk("%s ERROR: %d Reset session\n", __func__, 400 errorcode); 401 nfs4_schedule_session_recovery(clp->cl_session, errorcode); 402 goto wait_on_recovery; 403 #endif /* defined(CONFIG_NFS_V4_1) */ 404 case -NFS4ERR_FILE_OPEN: 405 if (exception->timeout > HZ) { 406 /* We have retried a decent amount, time to 407 * fail 408 */ 409 ret = -EBUSY; 410 break; 411 } 412 case -NFS4ERR_GRACE: 413 case -NFS4ERR_DELAY: 414 ret = nfs4_delay(server->client, &exception->timeout); 415 if (ret != 0) 416 break; 417 case -NFS4ERR_RETRY_UNCACHED_REP: 418 case -NFS4ERR_OLD_STATEID: 419 exception->retry = 1; 420 break; 421 case -NFS4ERR_BADOWNER: 422 /* The following works around a Linux server bug! */ 423 case -NFS4ERR_BADNAME: 424 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 425 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 426 exception->retry = 1; 427 printk(KERN_WARNING "NFS: v4 server %s " 428 "does not accept raw " 429 "uid/gids. " 430 "Reenabling the idmapper.\n", 431 server->nfs_client->cl_hostname); 432 } 433 } 434 /* We failed to handle the error */ 435 return nfs4_map_errors(ret); 436 wait_on_recovery: 437 ret = nfs4_wait_clnt_recover(clp); 438 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 439 return -EIO; 440 if (ret == 0) 441 exception->retry = 1; 442 return ret; 443 } 444 445 /* 446 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 447 * or 'false' otherwise. 448 */ 449 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 450 { 451 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 452 453 if (flavor == RPC_AUTH_GSS_KRB5I || 454 flavor == RPC_AUTH_GSS_KRB5P) 455 return true; 456 457 return false; 458 } 459 460 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 461 { 462 spin_lock(&clp->cl_lock); 463 if (time_before(clp->cl_last_renewal,timestamp)) 464 clp->cl_last_renewal = timestamp; 465 spin_unlock(&clp->cl_lock); 466 } 467 468 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 469 { 470 do_renew_lease(server->nfs_client, timestamp); 471 } 472 473 struct nfs4_call_sync_data { 474 const struct nfs_server *seq_server; 475 struct nfs4_sequence_args *seq_args; 476 struct nfs4_sequence_res *seq_res; 477 }; 478 479 void nfs4_init_sequence(struct nfs4_sequence_args *args, 480 struct nfs4_sequence_res *res, int cache_reply) 481 { 482 args->sa_slot = NULL; 483 args->sa_cache_this = cache_reply; 484 args->sa_privileged = 0; 485 486 res->sr_slot = NULL; 487 } 488 489 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args) 490 { 491 args->sa_privileged = 1; 492 } 493 494 int nfs40_setup_sequence(struct nfs4_slot_table *tbl, 495 struct nfs4_sequence_args *args, 496 struct nfs4_sequence_res *res, 497 struct rpc_task *task) 498 { 499 struct nfs4_slot *slot; 500 501 /* slot already allocated? */ 502 if (res->sr_slot != NULL) 503 goto out_start; 504 505 spin_lock(&tbl->slot_tbl_lock); 506 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 507 goto out_sleep; 508 509 slot = nfs4_alloc_slot(tbl); 510 if (IS_ERR(slot)) { 511 if (slot == ERR_PTR(-ENOMEM)) 512 task->tk_timeout = HZ >> 2; 513 goto out_sleep; 514 } 515 spin_unlock(&tbl->slot_tbl_lock); 516 517 args->sa_slot = slot; 518 res->sr_slot = slot; 519 520 out_start: 521 rpc_call_start(task); 522 return 0; 523 524 out_sleep: 525 if (args->sa_privileged) 526 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 527 NULL, RPC_PRIORITY_PRIVILEGED); 528 else 529 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 530 spin_unlock(&tbl->slot_tbl_lock); 531 return -EAGAIN; 532 } 533 EXPORT_SYMBOL_GPL(nfs40_setup_sequence); 534 535 static int nfs40_sequence_done(struct rpc_task *task, 536 struct nfs4_sequence_res *res) 537 { 538 struct nfs4_slot *slot = res->sr_slot; 539 struct nfs4_slot_table *tbl; 540 541 if (slot == NULL) 542 goto out; 543 544 tbl = slot->table; 545 spin_lock(&tbl->slot_tbl_lock); 546 if (!nfs41_wake_and_assign_slot(tbl, slot)) 547 nfs4_free_slot(tbl, slot); 548 spin_unlock(&tbl->slot_tbl_lock); 549 550 res->sr_slot = NULL; 551 out: 552 return 1; 553 } 554 555 #if defined(CONFIG_NFS_V4_1) 556 557 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 558 { 559 struct nfs4_session *session; 560 struct nfs4_slot_table *tbl; 561 struct nfs4_slot *slot = res->sr_slot; 562 bool send_new_highest_used_slotid = false; 563 564 tbl = slot->table; 565 session = tbl->session; 566 567 spin_lock(&tbl->slot_tbl_lock); 568 /* Be nice to the server: try to ensure that the last transmitted 569 * value for highest_user_slotid <= target_highest_slotid 570 */ 571 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 572 send_new_highest_used_slotid = true; 573 574 if (nfs41_wake_and_assign_slot(tbl, slot)) { 575 send_new_highest_used_slotid = false; 576 goto out_unlock; 577 } 578 nfs4_free_slot(tbl, slot); 579 580 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 581 send_new_highest_used_slotid = false; 582 out_unlock: 583 spin_unlock(&tbl->slot_tbl_lock); 584 res->sr_slot = NULL; 585 if (send_new_highest_used_slotid) 586 nfs41_server_notify_highest_slotid_update(session->clp); 587 } 588 589 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 590 { 591 struct nfs4_session *session; 592 struct nfs4_slot *slot = res->sr_slot; 593 struct nfs_client *clp; 594 bool interrupted = false; 595 int ret = 1; 596 597 if (slot == NULL) 598 goto out_noaction; 599 /* don't increment the sequence number if the task wasn't sent */ 600 if (!RPC_WAS_SENT(task)) 601 goto out; 602 603 session = slot->table->session; 604 605 if (slot->interrupted) { 606 slot->interrupted = 0; 607 interrupted = true; 608 } 609 610 trace_nfs4_sequence_done(session, res); 611 /* Check the SEQUENCE operation status */ 612 switch (res->sr_status) { 613 case 0: 614 /* Update the slot's sequence and clientid lease timer */ 615 ++slot->seq_nr; 616 clp = session->clp; 617 do_renew_lease(clp, res->sr_timestamp); 618 /* Check sequence flags */ 619 if (res->sr_status_flags != 0) 620 nfs4_schedule_lease_recovery(clp); 621 nfs41_update_target_slotid(slot->table, slot, res); 622 break; 623 case 1: 624 /* 625 * sr_status remains 1 if an RPC level error occurred. 626 * The server may or may not have processed the sequence 627 * operation.. 628 * Mark the slot as having hosted an interrupted RPC call. 629 */ 630 slot->interrupted = 1; 631 goto out; 632 case -NFS4ERR_DELAY: 633 /* The server detected a resend of the RPC call and 634 * returned NFS4ERR_DELAY as per Section 2.10.6.2 635 * of RFC5661. 636 */ 637 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 638 __func__, 639 slot->slot_nr, 640 slot->seq_nr); 641 goto out_retry; 642 case -NFS4ERR_BADSLOT: 643 /* 644 * The slot id we used was probably retired. Try again 645 * using a different slot id. 646 */ 647 goto retry_nowait; 648 case -NFS4ERR_SEQ_MISORDERED: 649 /* 650 * Was the last operation on this sequence interrupted? 651 * If so, retry after bumping the sequence number. 652 */ 653 if (interrupted) { 654 ++slot->seq_nr; 655 goto retry_nowait; 656 } 657 /* 658 * Could this slot have been previously retired? 659 * If so, then the server may be expecting seq_nr = 1! 660 */ 661 if (slot->seq_nr != 1) { 662 slot->seq_nr = 1; 663 goto retry_nowait; 664 } 665 break; 666 case -NFS4ERR_SEQ_FALSE_RETRY: 667 ++slot->seq_nr; 668 goto retry_nowait; 669 default: 670 /* Just update the slot sequence no. */ 671 ++slot->seq_nr; 672 } 673 out: 674 /* The session may be reset by one of the error handlers. */ 675 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 676 nfs41_sequence_free_slot(res); 677 out_noaction: 678 return ret; 679 retry_nowait: 680 if (rpc_restart_call_prepare(task)) { 681 task->tk_status = 0; 682 ret = 0; 683 } 684 goto out; 685 out_retry: 686 if (!rpc_restart_call(task)) 687 goto out; 688 rpc_delay(task, NFS4_POLL_RETRY_MAX); 689 return 0; 690 } 691 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 692 693 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 694 { 695 if (res->sr_slot == NULL) 696 return 1; 697 if (!res->sr_slot->table->session) 698 return nfs40_sequence_done(task, res); 699 return nfs41_sequence_done(task, res); 700 } 701 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 702 703 int nfs41_setup_sequence(struct nfs4_session *session, 704 struct nfs4_sequence_args *args, 705 struct nfs4_sequence_res *res, 706 struct rpc_task *task) 707 { 708 struct nfs4_slot *slot; 709 struct nfs4_slot_table *tbl; 710 711 dprintk("--> %s\n", __func__); 712 /* slot already allocated? */ 713 if (res->sr_slot != NULL) 714 goto out_success; 715 716 tbl = &session->fc_slot_table; 717 718 task->tk_timeout = 0; 719 720 spin_lock(&tbl->slot_tbl_lock); 721 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) && 722 !args->sa_privileged) { 723 /* The state manager will wait until the slot table is empty */ 724 dprintk("%s session is draining\n", __func__); 725 goto out_sleep; 726 } 727 728 slot = nfs4_alloc_slot(tbl); 729 if (IS_ERR(slot)) { 730 /* If out of memory, try again in 1/4 second */ 731 if (slot == ERR_PTR(-ENOMEM)) 732 task->tk_timeout = HZ >> 2; 733 dprintk("<-- %s: no free slots\n", __func__); 734 goto out_sleep; 735 } 736 spin_unlock(&tbl->slot_tbl_lock); 737 738 args->sa_slot = slot; 739 740 dprintk("<-- %s slotid=%u seqid=%u\n", __func__, 741 slot->slot_nr, slot->seq_nr); 742 743 res->sr_slot = slot; 744 res->sr_timestamp = jiffies; 745 res->sr_status_flags = 0; 746 /* 747 * sr_status is only set in decode_sequence, and so will remain 748 * set to 1 if an rpc level failure occurs. 749 */ 750 res->sr_status = 1; 751 trace_nfs4_setup_sequence(session, args); 752 out_success: 753 rpc_call_start(task); 754 return 0; 755 out_sleep: 756 /* Privileged tasks are queued with top priority */ 757 if (args->sa_privileged) 758 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 759 NULL, RPC_PRIORITY_PRIVILEGED); 760 else 761 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 762 spin_unlock(&tbl->slot_tbl_lock); 763 return -EAGAIN; 764 } 765 EXPORT_SYMBOL_GPL(nfs41_setup_sequence); 766 767 static int nfs4_setup_sequence(const struct nfs_server *server, 768 struct nfs4_sequence_args *args, 769 struct nfs4_sequence_res *res, 770 struct rpc_task *task) 771 { 772 struct nfs4_session *session = nfs4_get_session(server); 773 int ret = 0; 774 775 if (!session) 776 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl, 777 args, res, task); 778 779 dprintk("--> %s clp %p session %p sr_slot %u\n", 780 __func__, session->clp, session, res->sr_slot ? 781 res->sr_slot->slot_nr : NFS4_NO_SLOT); 782 783 ret = nfs41_setup_sequence(session, args, res, task); 784 785 dprintk("<-- %s status=%d\n", __func__, ret); 786 return ret; 787 } 788 789 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 790 { 791 struct nfs4_call_sync_data *data = calldata; 792 struct nfs4_session *session = nfs4_get_session(data->seq_server); 793 794 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 795 796 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task); 797 } 798 799 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 800 { 801 struct nfs4_call_sync_data *data = calldata; 802 803 nfs41_sequence_done(task, data->seq_res); 804 } 805 806 static const struct rpc_call_ops nfs41_call_sync_ops = { 807 .rpc_call_prepare = nfs41_call_sync_prepare, 808 .rpc_call_done = nfs41_call_sync_done, 809 }; 810 811 #else /* !CONFIG_NFS_V4_1 */ 812 813 static int nfs4_setup_sequence(const struct nfs_server *server, 814 struct nfs4_sequence_args *args, 815 struct nfs4_sequence_res *res, 816 struct rpc_task *task) 817 { 818 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl, 819 args, res, task); 820 } 821 822 int nfs4_sequence_done(struct rpc_task *task, 823 struct nfs4_sequence_res *res) 824 { 825 return nfs40_sequence_done(task, res); 826 } 827 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 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 int nfs4_call_sync(struct rpc_clnt *clnt, 881 struct nfs_server *server, 882 struct rpc_message *msg, 883 struct nfs4_sequence_args *args, 884 struct nfs4_sequence_res *res, 885 int cache_reply) 886 { 887 nfs4_init_sequence(args, res, cache_reply); 888 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 889 } 890 891 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) 892 { 893 struct nfs_inode *nfsi = NFS_I(dir); 894 895 spin_lock(&dir->i_lock); 896 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; 897 if (!cinfo->atomic || cinfo->before != dir->i_version) 898 nfs_force_lookup_revalidate(dir); 899 dir->i_version = cinfo->after; 900 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 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 u32 941 nfs4_map_atomic_open_share(struct nfs_server *server, 942 fmode_t fmode, int openflags) 943 { 944 u32 res = 0; 945 946 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 947 case FMODE_READ: 948 res = NFS4_SHARE_ACCESS_READ; 949 break; 950 case FMODE_WRITE: 951 res = NFS4_SHARE_ACCESS_WRITE; 952 break; 953 case FMODE_READ|FMODE_WRITE: 954 res = NFS4_SHARE_ACCESS_BOTH; 955 } 956 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 957 goto out; 958 /* Want no delegation if we're using O_DIRECT */ 959 if (openflags & O_DIRECT) 960 res |= NFS4_SHARE_WANT_NO_DELEG; 961 out: 962 return res; 963 } 964 965 static enum open_claim_type4 966 nfs4_map_atomic_open_claim(struct nfs_server *server, 967 enum open_claim_type4 claim) 968 { 969 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 970 return claim; 971 switch (claim) { 972 default: 973 return claim; 974 case NFS4_OPEN_CLAIM_FH: 975 return NFS4_OPEN_CLAIM_NULL; 976 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 977 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 978 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 979 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 980 } 981 } 982 983 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 984 { 985 p->o_res.f_attr = &p->f_attr; 986 p->o_res.f_label = p->f_label; 987 p->o_res.seqid = p->o_arg.seqid; 988 p->c_res.seqid = p->c_arg.seqid; 989 p->o_res.server = p->o_arg.server; 990 p->o_res.access_request = p->o_arg.access; 991 nfs_fattr_init(&p->f_attr); 992 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 993 } 994 995 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 996 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 997 const struct iattr *attrs, 998 struct nfs4_label *label, 999 enum open_claim_type4 claim, 1000 gfp_t gfp_mask) 1001 { 1002 struct dentry *parent = dget_parent(dentry); 1003 struct inode *dir = d_inode(parent); 1004 struct nfs_server *server = NFS_SERVER(dir); 1005 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1006 struct nfs4_opendata *p; 1007 1008 p = kzalloc(sizeof(*p), gfp_mask); 1009 if (p == NULL) 1010 goto err; 1011 1012 p->f_label = nfs4_label_alloc(server, gfp_mask); 1013 if (IS_ERR(p->f_label)) 1014 goto err_free_p; 1015 1016 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1017 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1018 if (IS_ERR(p->o_arg.seqid)) 1019 goto err_free_label; 1020 nfs_sb_active(dentry->d_sb); 1021 p->dentry = dget(dentry); 1022 p->dir = parent; 1023 p->owner = sp; 1024 atomic_inc(&sp->so_count); 1025 p->o_arg.open_flags = flags; 1026 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1027 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1028 fmode, flags); 1029 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS 1030 * will return permission denied for all bits until close */ 1031 if (!(flags & O_EXCL)) { 1032 /* ask server to check for all possible rights as results 1033 * are cached */ 1034 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | 1035 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE; 1036 } 1037 p->o_arg.clientid = server->nfs_client->cl_clientid; 1038 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1039 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1040 p->o_arg.name = &dentry->d_name; 1041 p->o_arg.server = server; 1042 p->o_arg.bitmask = nfs4_bitmask(server, label); 1043 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1044 p->o_arg.label = label; 1045 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1046 switch (p->o_arg.claim) { 1047 case NFS4_OPEN_CLAIM_NULL: 1048 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1049 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1050 p->o_arg.fh = NFS_FH(dir); 1051 break; 1052 case NFS4_OPEN_CLAIM_PREVIOUS: 1053 case NFS4_OPEN_CLAIM_FH: 1054 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1055 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1056 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1057 } 1058 if (attrs != NULL && attrs->ia_valid != 0) { 1059 __u32 verf[2]; 1060 1061 p->o_arg.u.attrs = &p->attrs; 1062 memcpy(&p->attrs, attrs, sizeof(p->attrs)); 1063 1064 verf[0] = jiffies; 1065 verf[1] = current->pid; 1066 memcpy(p->o_arg.u.verifier.data, verf, 1067 sizeof(p->o_arg.u.verifier.data)); 1068 } 1069 p->c_arg.fh = &p->o_res.fh; 1070 p->c_arg.stateid = &p->o_res.stateid; 1071 p->c_arg.seqid = p->o_arg.seqid; 1072 nfs4_init_opendata_res(p); 1073 kref_init(&p->kref); 1074 return p; 1075 1076 err_free_label: 1077 nfs4_label_free(p->f_label); 1078 err_free_p: 1079 kfree(p); 1080 err: 1081 dput(parent); 1082 return NULL; 1083 } 1084 1085 static void nfs4_opendata_free(struct kref *kref) 1086 { 1087 struct nfs4_opendata *p = container_of(kref, 1088 struct nfs4_opendata, kref); 1089 struct super_block *sb = p->dentry->d_sb; 1090 1091 nfs_free_seqid(p->o_arg.seqid); 1092 if (p->state != NULL) 1093 nfs4_put_open_state(p->state); 1094 nfs4_put_state_owner(p->owner); 1095 1096 nfs4_label_free(p->f_label); 1097 1098 dput(p->dir); 1099 dput(p->dentry); 1100 nfs_sb_deactive(sb); 1101 nfs_fattr_free_names(&p->f_attr); 1102 kfree(p->f_attr.mdsthreshold); 1103 kfree(p); 1104 } 1105 1106 static void nfs4_opendata_put(struct nfs4_opendata *p) 1107 { 1108 if (p != NULL) 1109 kref_put(&p->kref, nfs4_opendata_free); 1110 } 1111 1112 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) 1113 { 1114 int ret; 1115 1116 ret = rpc_wait_for_completion_task(task); 1117 return ret; 1118 } 1119 1120 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) 1121 { 1122 int ret = 0; 1123 1124 if (open_mode & (O_EXCL|O_TRUNC)) 1125 goto out; 1126 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1127 case FMODE_READ: 1128 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1129 && state->n_rdonly != 0; 1130 break; 1131 case FMODE_WRITE: 1132 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1133 && state->n_wronly != 0; 1134 break; 1135 case FMODE_READ|FMODE_WRITE: 1136 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1137 && state->n_rdwr != 0; 1138 } 1139 out: 1140 return ret; 1141 } 1142 1143 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) 1144 { 1145 if (delegation == NULL) 1146 return 0; 1147 if ((delegation->type & fmode) != fmode) 1148 return 0; 1149 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) 1150 return 0; 1151 nfs_mark_delegation_referenced(delegation); 1152 return 1; 1153 } 1154 1155 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1156 { 1157 switch (fmode) { 1158 case FMODE_WRITE: 1159 state->n_wronly++; 1160 break; 1161 case FMODE_READ: 1162 state->n_rdonly++; 1163 break; 1164 case FMODE_READ|FMODE_WRITE: 1165 state->n_rdwr++; 1166 } 1167 nfs4_state_set_mode_locked(state, state->state | fmode); 1168 } 1169 1170 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1171 { 1172 struct nfs_client *clp = state->owner->so_server->nfs_client; 1173 bool need_recover = false; 1174 1175 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1176 need_recover = true; 1177 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1178 need_recover = true; 1179 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1180 need_recover = true; 1181 if (need_recover) 1182 nfs4_state_mark_reclaim_nograce(clp, state); 1183 } 1184 1185 static bool nfs_need_update_open_stateid(struct nfs4_state *state, 1186 nfs4_stateid *stateid) 1187 { 1188 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0) 1189 return true; 1190 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1191 nfs_test_and_clear_all_open_stateid(state); 1192 return true; 1193 } 1194 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) 1195 return true; 1196 return false; 1197 } 1198 1199 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1200 { 1201 if (state->n_wronly) 1202 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1203 if (state->n_rdonly) 1204 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1205 if (state->n_rdwr) 1206 set_bit(NFS_O_RDWR_STATE, &state->flags); 1207 } 1208 1209 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1210 nfs4_stateid *stateid, fmode_t fmode) 1211 { 1212 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1213 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1214 case FMODE_WRITE: 1215 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1216 break; 1217 case FMODE_READ: 1218 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1219 break; 1220 case 0: 1221 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1222 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1223 clear_bit(NFS_OPEN_STATE, &state->flags); 1224 } 1225 if (stateid == NULL) 1226 return; 1227 /* Handle races with OPEN */ 1228 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) || 1229 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1230 nfs_resync_open_stateid_locked(state); 1231 return; 1232 } 1233 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1234 nfs4_stateid_copy(&state->stateid, stateid); 1235 nfs4_stateid_copy(&state->open_stateid, stateid); 1236 } 1237 1238 static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) 1239 { 1240 write_seqlock(&state->seqlock); 1241 nfs_clear_open_stateid_locked(state, stateid, fmode); 1242 write_sequnlock(&state->seqlock); 1243 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1244 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1245 } 1246 1247 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) 1248 { 1249 switch (fmode) { 1250 case FMODE_READ: 1251 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1252 break; 1253 case FMODE_WRITE: 1254 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1255 break; 1256 case FMODE_READ|FMODE_WRITE: 1257 set_bit(NFS_O_RDWR_STATE, &state->flags); 1258 } 1259 if (!nfs_need_update_open_stateid(state, stateid)) 1260 return; 1261 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1262 nfs4_stateid_copy(&state->stateid, stateid); 1263 nfs4_stateid_copy(&state->open_stateid, stateid); 1264 } 1265 1266 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) 1267 { 1268 /* 1269 * Protect the call to nfs4_state_set_mode_locked and 1270 * serialise the stateid update 1271 */ 1272 write_seqlock(&state->seqlock); 1273 if (deleg_stateid != NULL) { 1274 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1275 set_bit(NFS_DELEGATED_STATE, &state->flags); 1276 } 1277 if (open_stateid != NULL) 1278 nfs_set_open_stateid_locked(state, open_stateid, fmode); 1279 write_sequnlock(&state->seqlock); 1280 spin_lock(&state->owner->so_lock); 1281 update_open_stateflags(state, fmode); 1282 spin_unlock(&state->owner->so_lock); 1283 } 1284 1285 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) 1286 { 1287 struct nfs_inode *nfsi = NFS_I(state->inode); 1288 struct nfs_delegation *deleg_cur; 1289 int ret = 0; 1290 1291 fmode &= (FMODE_READ|FMODE_WRITE); 1292 1293 rcu_read_lock(); 1294 deleg_cur = rcu_dereference(nfsi->delegation); 1295 if (deleg_cur == NULL) 1296 goto no_delegation; 1297 1298 spin_lock(&deleg_cur->lock); 1299 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1300 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1301 (deleg_cur->type & fmode) != fmode) 1302 goto no_delegation_unlock; 1303 1304 if (delegation == NULL) 1305 delegation = &deleg_cur->stateid; 1306 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation)) 1307 goto no_delegation_unlock; 1308 1309 nfs_mark_delegation_referenced(deleg_cur); 1310 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); 1311 ret = 1; 1312 no_delegation_unlock: 1313 spin_unlock(&deleg_cur->lock); 1314 no_delegation: 1315 rcu_read_unlock(); 1316 1317 if (!ret && open_stateid != NULL) { 1318 __update_open_stateid(state, open_stateid, NULL, fmode); 1319 ret = 1; 1320 } 1321 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1322 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1323 1324 return ret; 1325 } 1326 1327 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1328 const nfs4_stateid *stateid) 1329 { 1330 struct nfs4_state *state = lsp->ls_state; 1331 bool ret = false; 1332 1333 spin_lock(&state->state_lock); 1334 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1335 goto out_noupdate; 1336 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1337 goto out_noupdate; 1338 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1339 ret = true; 1340 out_noupdate: 1341 spin_unlock(&state->state_lock); 1342 return ret; 1343 } 1344 1345 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1346 { 1347 struct nfs_delegation *delegation; 1348 1349 rcu_read_lock(); 1350 delegation = rcu_dereference(NFS_I(inode)->delegation); 1351 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1352 rcu_read_unlock(); 1353 return; 1354 } 1355 rcu_read_unlock(); 1356 nfs4_inode_return_delegation(inode); 1357 } 1358 1359 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1360 { 1361 struct nfs4_state *state = opendata->state; 1362 struct nfs_inode *nfsi = NFS_I(state->inode); 1363 struct nfs_delegation *delegation; 1364 int open_mode = opendata->o_arg.open_flags; 1365 fmode_t fmode = opendata->o_arg.fmode; 1366 nfs4_stateid stateid; 1367 int ret = -EAGAIN; 1368 1369 for (;;) { 1370 spin_lock(&state->owner->so_lock); 1371 if (can_open_cached(state, fmode, open_mode)) { 1372 update_open_stateflags(state, fmode); 1373 spin_unlock(&state->owner->so_lock); 1374 goto out_return_state; 1375 } 1376 spin_unlock(&state->owner->so_lock); 1377 rcu_read_lock(); 1378 delegation = rcu_dereference(nfsi->delegation); 1379 if (!can_open_delegated(delegation, fmode)) { 1380 rcu_read_unlock(); 1381 break; 1382 } 1383 /* Save the delegation */ 1384 nfs4_stateid_copy(&stateid, &delegation->stateid); 1385 rcu_read_unlock(); 1386 nfs_release_seqid(opendata->o_arg.seqid); 1387 if (!opendata->is_recover) { 1388 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1389 if (ret != 0) 1390 goto out; 1391 } 1392 ret = -EAGAIN; 1393 1394 /* Try to update the stateid using the delegation */ 1395 if (update_open_stateid(state, NULL, &stateid, fmode)) 1396 goto out_return_state; 1397 } 1398 out: 1399 return ERR_PTR(ret); 1400 out_return_state: 1401 atomic_inc(&state->count); 1402 return state; 1403 } 1404 1405 static void 1406 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1407 { 1408 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1409 struct nfs_delegation *delegation; 1410 int delegation_flags = 0; 1411 1412 rcu_read_lock(); 1413 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1414 if (delegation) 1415 delegation_flags = delegation->flags; 1416 rcu_read_unlock(); 1417 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) { 1418 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1419 "returning a delegation for " 1420 "OPEN(CLAIM_DELEGATE_CUR)\n", 1421 clp->cl_hostname); 1422 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1423 nfs_inode_set_delegation(state->inode, 1424 data->owner->so_cred, 1425 &data->o_res); 1426 else 1427 nfs_inode_reclaim_delegation(state->inode, 1428 data->owner->so_cred, 1429 &data->o_res); 1430 } 1431 1432 /* 1433 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1434 * and update the nfs4_state. 1435 */ 1436 static struct nfs4_state * 1437 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1438 { 1439 struct inode *inode = data->state->inode; 1440 struct nfs4_state *state = data->state; 1441 int ret; 1442 1443 if (!data->rpc_done) { 1444 if (data->rpc_status) { 1445 ret = data->rpc_status; 1446 goto err; 1447 } 1448 /* cached opens have already been processed */ 1449 goto update; 1450 } 1451 1452 ret = nfs_refresh_inode(inode, &data->f_attr); 1453 if (ret) 1454 goto err; 1455 1456 if (data->o_res.delegation_type != 0) 1457 nfs4_opendata_check_deleg(data, state); 1458 update: 1459 update_open_stateid(state, &data->o_res.stateid, NULL, 1460 data->o_arg.fmode); 1461 atomic_inc(&state->count); 1462 1463 return state; 1464 err: 1465 return ERR_PTR(ret); 1466 1467 } 1468 1469 static struct nfs4_state * 1470 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1471 { 1472 struct inode *inode; 1473 struct nfs4_state *state = NULL; 1474 int ret; 1475 1476 if (!data->rpc_done) { 1477 state = nfs4_try_open_cached(data); 1478 goto out; 1479 } 1480 1481 ret = -EAGAIN; 1482 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 1483 goto err; 1484 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label); 1485 ret = PTR_ERR(inode); 1486 if (IS_ERR(inode)) 1487 goto err; 1488 ret = -ENOMEM; 1489 state = nfs4_get_open_state(inode, data->owner); 1490 if (state == NULL) 1491 goto err_put_inode; 1492 if (data->o_res.delegation_type != 0) 1493 nfs4_opendata_check_deleg(data, state); 1494 update_open_stateid(state, &data->o_res.stateid, NULL, 1495 data->o_arg.fmode); 1496 iput(inode); 1497 out: 1498 nfs_release_seqid(data->o_arg.seqid); 1499 return state; 1500 err_put_inode: 1501 iput(inode); 1502 err: 1503 return ERR_PTR(ret); 1504 } 1505 1506 static struct nfs4_state * 1507 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1508 { 1509 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 1510 return _nfs4_opendata_reclaim_to_nfs4_state(data); 1511 return _nfs4_opendata_to_nfs4_state(data); 1512 } 1513 1514 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) 1515 { 1516 struct nfs_inode *nfsi = NFS_I(state->inode); 1517 struct nfs_open_context *ctx; 1518 1519 spin_lock(&state->inode->i_lock); 1520 list_for_each_entry(ctx, &nfsi->open_files, list) { 1521 if (ctx->state != state) 1522 continue; 1523 get_nfs_open_context(ctx); 1524 spin_unlock(&state->inode->i_lock); 1525 return ctx; 1526 } 1527 spin_unlock(&state->inode->i_lock); 1528 return ERR_PTR(-ENOENT); 1529 } 1530 1531 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 1532 struct nfs4_state *state, enum open_claim_type4 claim) 1533 { 1534 struct nfs4_opendata *opendata; 1535 1536 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 1537 NULL, NULL, claim, GFP_NOFS); 1538 if (opendata == NULL) 1539 return ERR_PTR(-ENOMEM); 1540 opendata->state = state; 1541 atomic_inc(&state->count); 1542 return opendata; 1543 } 1544 1545 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) 1546 { 1547 struct nfs4_state *newstate; 1548 int ret; 1549 1550 if ((opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR || 1551 opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEG_CUR_FH) && 1552 (opendata->o_arg.u.delegation_type & fmode) != fmode) 1553 /* This mode can't have been delegated, so we must have 1554 * a valid open_stateid to cover it - not need to reclaim. 1555 */ 1556 return 0; 1557 opendata->o_arg.open_flags = 0; 1558 opendata->o_arg.fmode = fmode; 1559 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 1560 NFS_SB(opendata->dentry->d_sb), 1561 fmode, 0); 1562 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 1563 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 1564 nfs4_init_opendata_res(opendata); 1565 ret = _nfs4_recover_proc_open(opendata); 1566 if (ret != 0) 1567 return ret; 1568 newstate = nfs4_opendata_to_nfs4_state(opendata); 1569 if (IS_ERR(newstate)) 1570 return PTR_ERR(newstate); 1571 nfs4_close_state(newstate, fmode); 1572 *res = newstate; 1573 return 0; 1574 } 1575 1576 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 1577 { 1578 struct nfs4_state *newstate; 1579 int ret; 1580 1581 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */ 1582 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1583 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1584 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1585 /* memory barrier prior to reading state->n_* */ 1586 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1587 clear_bit(NFS_OPEN_STATE, &state->flags); 1588 smp_rmb(); 1589 if (state->n_rdwr != 0) { 1590 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); 1591 if (ret != 0) 1592 return ret; 1593 if (newstate != state) 1594 return -ESTALE; 1595 } 1596 if (state->n_wronly != 0) { 1597 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); 1598 if (ret != 0) 1599 return ret; 1600 if (newstate != state) 1601 return -ESTALE; 1602 } 1603 if (state->n_rdonly != 0) { 1604 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); 1605 if (ret != 0) 1606 return ret; 1607 if (newstate != state) 1608 return -ESTALE; 1609 } 1610 /* 1611 * We may have performed cached opens for all three recoveries. 1612 * Check if we need to update the current stateid. 1613 */ 1614 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 1615 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 1616 write_seqlock(&state->seqlock); 1617 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1618 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1619 write_sequnlock(&state->seqlock); 1620 } 1621 return 0; 1622 } 1623 1624 /* 1625 * OPEN_RECLAIM: 1626 * reclaim state on the server after a reboot. 1627 */ 1628 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 1629 { 1630 struct nfs_delegation *delegation; 1631 struct nfs4_opendata *opendata; 1632 fmode_t delegation_type = 0; 1633 int status; 1634 1635 opendata = nfs4_open_recoverdata_alloc(ctx, state, 1636 NFS4_OPEN_CLAIM_PREVIOUS); 1637 if (IS_ERR(opendata)) 1638 return PTR_ERR(opendata); 1639 rcu_read_lock(); 1640 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1641 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 1642 delegation_type = delegation->type; 1643 rcu_read_unlock(); 1644 opendata->o_arg.u.delegation_type = delegation_type; 1645 status = nfs4_open_recover(opendata, state); 1646 nfs4_opendata_put(opendata); 1647 return status; 1648 } 1649 1650 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 1651 { 1652 struct nfs_server *server = NFS_SERVER(state->inode); 1653 struct nfs4_exception exception = { }; 1654 int err; 1655 do { 1656 err = _nfs4_do_open_reclaim(ctx, state); 1657 trace_nfs4_open_reclaim(ctx, 0, err); 1658 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 1659 continue; 1660 if (err != -NFS4ERR_DELAY) 1661 break; 1662 nfs4_handle_exception(server, err, &exception); 1663 } while (exception.retry); 1664 return err; 1665 } 1666 1667 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 1668 { 1669 struct nfs_open_context *ctx; 1670 int ret; 1671 1672 ctx = nfs4_state_find_open_context(state); 1673 if (IS_ERR(ctx)) 1674 return -EAGAIN; 1675 ret = nfs4_do_open_reclaim(ctx, state); 1676 put_nfs_open_context(ctx); 1677 return ret; 1678 } 1679 1680 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err) 1681 { 1682 switch (err) { 1683 default: 1684 printk(KERN_ERR "NFS: %s: unhandled error " 1685 "%d.\n", __func__, err); 1686 case 0: 1687 case -ENOENT: 1688 case -EAGAIN: 1689 case -ESTALE: 1690 break; 1691 case -NFS4ERR_BADSESSION: 1692 case -NFS4ERR_BADSLOT: 1693 case -NFS4ERR_BAD_HIGH_SLOT: 1694 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 1695 case -NFS4ERR_DEADSESSION: 1696 set_bit(NFS_DELEGATED_STATE, &state->flags); 1697 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); 1698 return -EAGAIN; 1699 case -NFS4ERR_STALE_CLIENTID: 1700 case -NFS4ERR_STALE_STATEID: 1701 set_bit(NFS_DELEGATED_STATE, &state->flags); 1702 case -NFS4ERR_EXPIRED: 1703 /* Don't recall a delegation if it was lost */ 1704 nfs4_schedule_lease_recovery(server->nfs_client); 1705 return -EAGAIN; 1706 case -NFS4ERR_MOVED: 1707 nfs4_schedule_migration_recovery(server); 1708 return -EAGAIN; 1709 case -NFS4ERR_LEASE_MOVED: 1710 nfs4_schedule_lease_moved_recovery(server->nfs_client); 1711 return -EAGAIN; 1712 case -NFS4ERR_DELEG_REVOKED: 1713 case -NFS4ERR_ADMIN_REVOKED: 1714 case -NFS4ERR_BAD_STATEID: 1715 case -NFS4ERR_OPENMODE: 1716 nfs_inode_find_state_and_recover(state->inode, 1717 stateid); 1718 nfs4_schedule_stateid_recovery(server, state); 1719 return -EAGAIN; 1720 case -NFS4ERR_DELAY: 1721 case -NFS4ERR_GRACE: 1722 set_bit(NFS_DELEGATED_STATE, &state->flags); 1723 ssleep(1); 1724 return -EAGAIN; 1725 case -ENOMEM: 1726 case -NFS4ERR_DENIED: 1727 /* kill_proc(fl->fl_pid, SIGLOST, 1); */ 1728 return 0; 1729 } 1730 return err; 1731 } 1732 1733 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) 1734 { 1735 struct nfs_server *server = NFS_SERVER(state->inode); 1736 struct nfs4_opendata *opendata; 1737 int err; 1738 1739 opendata = nfs4_open_recoverdata_alloc(ctx, state, 1740 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 1741 if (IS_ERR(opendata)) 1742 return PTR_ERR(opendata); 1743 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 1744 err = nfs4_open_recover(opendata, state); 1745 nfs4_opendata_put(opendata); 1746 return nfs4_handle_delegation_recall_error(server, state, stateid, err); 1747 } 1748 1749 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 1750 { 1751 struct nfs4_opendata *data = calldata; 1752 1753 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl, 1754 &data->c_arg.seq_args, &data->c_res.seq_res, task); 1755 } 1756 1757 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 1758 { 1759 struct nfs4_opendata *data = calldata; 1760 1761 nfs40_sequence_done(task, &data->c_res.seq_res); 1762 1763 data->rpc_status = task->tk_status; 1764 if (data->rpc_status == 0) { 1765 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 1766 nfs_confirm_seqid(&data->owner->so_seqid, 0); 1767 renew_lease(data->o_res.server, data->timestamp); 1768 data->rpc_done = 1; 1769 } 1770 } 1771 1772 static void nfs4_open_confirm_release(void *calldata) 1773 { 1774 struct nfs4_opendata *data = calldata; 1775 struct nfs4_state *state = NULL; 1776 1777 /* If this request hasn't been cancelled, do nothing */ 1778 if (data->cancelled == 0) 1779 goto out_free; 1780 /* In case of error, no cleanup! */ 1781 if (!data->rpc_done) 1782 goto out_free; 1783 state = nfs4_opendata_to_nfs4_state(data); 1784 if (!IS_ERR(state)) 1785 nfs4_close_state(state, data->o_arg.fmode); 1786 out_free: 1787 nfs4_opendata_put(data); 1788 } 1789 1790 static const struct rpc_call_ops nfs4_open_confirm_ops = { 1791 .rpc_call_prepare = nfs4_open_confirm_prepare, 1792 .rpc_call_done = nfs4_open_confirm_done, 1793 .rpc_release = nfs4_open_confirm_release, 1794 }; 1795 1796 /* 1797 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 1798 */ 1799 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 1800 { 1801 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 1802 struct rpc_task *task; 1803 struct rpc_message msg = { 1804 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 1805 .rpc_argp = &data->c_arg, 1806 .rpc_resp = &data->c_res, 1807 .rpc_cred = data->owner->so_cred, 1808 }; 1809 struct rpc_task_setup task_setup_data = { 1810 .rpc_client = server->client, 1811 .rpc_message = &msg, 1812 .callback_ops = &nfs4_open_confirm_ops, 1813 .callback_data = data, 1814 .workqueue = nfsiod_workqueue, 1815 .flags = RPC_TASK_ASYNC, 1816 }; 1817 int status; 1818 1819 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1); 1820 kref_get(&data->kref); 1821 data->rpc_done = 0; 1822 data->rpc_status = 0; 1823 data->timestamp = jiffies; 1824 task = rpc_run_task(&task_setup_data); 1825 if (IS_ERR(task)) 1826 return PTR_ERR(task); 1827 status = nfs4_wait_for_completion_rpc_task(task); 1828 if (status != 0) { 1829 data->cancelled = 1; 1830 smp_wmb(); 1831 } else 1832 status = data->rpc_status; 1833 rpc_put_task(task); 1834 return status; 1835 } 1836 1837 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 1838 { 1839 struct nfs4_opendata *data = calldata; 1840 struct nfs4_state_owner *sp = data->owner; 1841 struct nfs_client *clp = sp->so_server->nfs_client; 1842 1843 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 1844 goto out_wait; 1845 /* 1846 * Check if we still need to send an OPEN call, or if we can use 1847 * a delegation instead. 1848 */ 1849 if (data->state != NULL) { 1850 struct nfs_delegation *delegation; 1851 1852 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) 1853 goto out_no_action; 1854 rcu_read_lock(); 1855 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); 1856 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR && 1857 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH && 1858 can_open_delegated(delegation, data->o_arg.fmode)) 1859 goto unlock_no_action; 1860 rcu_read_unlock(); 1861 } 1862 /* Update client id. */ 1863 data->o_arg.clientid = clp->cl_clientid; 1864 switch (data->o_arg.claim) { 1865 case NFS4_OPEN_CLAIM_PREVIOUS: 1866 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1867 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1868 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 1869 case NFS4_OPEN_CLAIM_FH: 1870 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 1871 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); 1872 } 1873 data->timestamp = jiffies; 1874 if (nfs4_setup_sequence(data->o_arg.server, 1875 &data->o_arg.seq_args, 1876 &data->o_res.seq_res, 1877 task) != 0) 1878 nfs_release_seqid(data->o_arg.seqid); 1879 1880 /* Set the create mode (note dependency on the session type) */ 1881 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 1882 if (data->o_arg.open_flags & O_EXCL) { 1883 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 1884 if (nfs4_has_persistent_session(clp)) 1885 data->o_arg.createmode = NFS4_CREATE_GUARDED; 1886 else if (clp->cl_mvops->minor_version > 0) 1887 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 1888 } 1889 return; 1890 unlock_no_action: 1891 rcu_read_unlock(); 1892 out_no_action: 1893 task->tk_action = NULL; 1894 out_wait: 1895 nfs4_sequence_done(task, &data->o_res.seq_res); 1896 } 1897 1898 static void nfs4_open_done(struct rpc_task *task, void *calldata) 1899 { 1900 struct nfs4_opendata *data = calldata; 1901 1902 data->rpc_status = task->tk_status; 1903 1904 if (!nfs4_sequence_done(task, &data->o_res.seq_res)) 1905 return; 1906 1907 if (task->tk_status == 0) { 1908 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 1909 switch (data->o_res.f_attr->mode & S_IFMT) { 1910 case S_IFREG: 1911 break; 1912 case S_IFLNK: 1913 data->rpc_status = -ELOOP; 1914 break; 1915 case S_IFDIR: 1916 data->rpc_status = -EISDIR; 1917 break; 1918 default: 1919 data->rpc_status = -ENOTDIR; 1920 } 1921 } 1922 renew_lease(data->o_res.server, data->timestamp); 1923 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 1924 nfs_confirm_seqid(&data->owner->so_seqid, 0); 1925 } 1926 data->rpc_done = 1; 1927 } 1928 1929 static void nfs4_open_release(void *calldata) 1930 { 1931 struct nfs4_opendata *data = calldata; 1932 struct nfs4_state *state = NULL; 1933 1934 /* If this request hasn't been cancelled, do nothing */ 1935 if (data->cancelled == 0) 1936 goto out_free; 1937 /* In case of error, no cleanup! */ 1938 if (data->rpc_status != 0 || !data->rpc_done) 1939 goto out_free; 1940 /* In case we need an open_confirm, no cleanup! */ 1941 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 1942 goto out_free; 1943 state = nfs4_opendata_to_nfs4_state(data); 1944 if (!IS_ERR(state)) 1945 nfs4_close_state(state, data->o_arg.fmode); 1946 out_free: 1947 nfs4_opendata_put(data); 1948 } 1949 1950 static const struct rpc_call_ops nfs4_open_ops = { 1951 .rpc_call_prepare = nfs4_open_prepare, 1952 .rpc_call_done = nfs4_open_done, 1953 .rpc_release = nfs4_open_release, 1954 }; 1955 1956 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) 1957 { 1958 struct inode *dir = d_inode(data->dir); 1959 struct nfs_server *server = NFS_SERVER(dir); 1960 struct nfs_openargs *o_arg = &data->o_arg; 1961 struct nfs_openres *o_res = &data->o_res; 1962 struct rpc_task *task; 1963 struct rpc_message msg = { 1964 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 1965 .rpc_argp = o_arg, 1966 .rpc_resp = o_res, 1967 .rpc_cred = data->owner->so_cred, 1968 }; 1969 struct rpc_task_setup task_setup_data = { 1970 .rpc_client = server->client, 1971 .rpc_message = &msg, 1972 .callback_ops = &nfs4_open_ops, 1973 .callback_data = data, 1974 .workqueue = nfsiod_workqueue, 1975 .flags = RPC_TASK_ASYNC, 1976 }; 1977 int status; 1978 1979 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1); 1980 kref_get(&data->kref); 1981 data->rpc_done = 0; 1982 data->rpc_status = 0; 1983 data->cancelled = 0; 1984 data->is_recover = 0; 1985 if (isrecover) { 1986 nfs4_set_sequence_privileged(&o_arg->seq_args); 1987 data->is_recover = 1; 1988 } 1989 task = rpc_run_task(&task_setup_data); 1990 if (IS_ERR(task)) 1991 return PTR_ERR(task); 1992 status = nfs4_wait_for_completion_rpc_task(task); 1993 if (status != 0) { 1994 data->cancelled = 1; 1995 smp_wmb(); 1996 } else 1997 status = data->rpc_status; 1998 rpc_put_task(task); 1999 2000 return status; 2001 } 2002 2003 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2004 { 2005 struct inode *dir = d_inode(data->dir); 2006 struct nfs_openres *o_res = &data->o_res; 2007 int status; 2008 2009 status = nfs4_run_open_task(data, 1); 2010 if (status != 0 || !data->rpc_done) 2011 return status; 2012 2013 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2014 2015 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2016 status = _nfs4_proc_open_confirm(data); 2017 if (status != 0) 2018 return status; 2019 } 2020 2021 return status; 2022 } 2023 2024 /* 2025 * Additional permission checks in order to distinguish between an 2026 * open for read, and an open for execute. This works around the 2027 * fact that NFSv4 OPEN treats read and execute permissions as being 2028 * the same. 2029 * Note that in the non-execute case, we want to turn off permission 2030 * checking if we just created a new file (POSIX open() semantics). 2031 */ 2032 static int nfs4_opendata_access(struct rpc_cred *cred, 2033 struct nfs4_opendata *opendata, 2034 struct nfs4_state *state, fmode_t fmode, 2035 int openflags) 2036 { 2037 struct nfs_access_entry cache; 2038 u32 mask; 2039 2040 /* access call failed or for some reason the server doesn't 2041 * support any access modes -- defer access call until later */ 2042 if (opendata->o_res.access_supported == 0) 2043 return 0; 2044 2045 mask = 0; 2046 /* 2047 * Use openflags to check for exec, because fmode won't 2048 * always have FMODE_EXEC set when file open for exec. 2049 */ 2050 if (openflags & __FMODE_EXEC) { 2051 /* ONLY check for exec rights */ 2052 mask = MAY_EXEC; 2053 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2054 mask = MAY_READ; 2055 2056 cache.cred = cred; 2057 cache.jiffies = jiffies; 2058 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2059 nfs_access_add_cache(state->inode, &cache); 2060 2061 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0) 2062 return 0; 2063 2064 /* even though OPEN succeeded, access is denied. Close the file */ 2065 nfs4_close_state(state, fmode); 2066 return -EACCES; 2067 } 2068 2069 /* 2070 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2071 */ 2072 static int _nfs4_proc_open(struct nfs4_opendata *data) 2073 { 2074 struct inode *dir = d_inode(data->dir); 2075 struct nfs_server *server = NFS_SERVER(dir); 2076 struct nfs_openargs *o_arg = &data->o_arg; 2077 struct nfs_openres *o_res = &data->o_res; 2078 int status; 2079 2080 status = nfs4_run_open_task(data, 0); 2081 if (!data->rpc_done) 2082 return status; 2083 if (status != 0) { 2084 if (status == -NFS4ERR_BADNAME && 2085 !(o_arg->open_flags & O_CREAT)) 2086 return -ENOENT; 2087 return status; 2088 } 2089 2090 nfs_fattr_map_and_free_names(server, &data->f_attr); 2091 2092 if (o_arg->open_flags & O_CREAT) { 2093 update_changeattr(dir, &o_res->cinfo); 2094 if (o_arg->open_flags & O_EXCL) 2095 data->file_created = 1; 2096 else if (o_res->cinfo.before != o_res->cinfo.after) 2097 data->file_created = 1; 2098 } 2099 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2100 server->caps &= ~NFS_CAP_POSIX_LOCK; 2101 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2102 status = _nfs4_proc_open_confirm(data); 2103 if (status != 0) 2104 return status; 2105 } 2106 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) 2107 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label); 2108 return 0; 2109 } 2110 2111 static int nfs4_recover_expired_lease(struct nfs_server *server) 2112 { 2113 return nfs4_client_recover_expired_lease(server->nfs_client); 2114 } 2115 2116 /* 2117 * OPEN_EXPIRED: 2118 * reclaim state on the server after a network partition. 2119 * Assumes caller holds the appropriate lock 2120 */ 2121 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2122 { 2123 struct nfs4_opendata *opendata; 2124 int ret; 2125 2126 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2127 NFS4_OPEN_CLAIM_FH); 2128 if (IS_ERR(opendata)) 2129 return PTR_ERR(opendata); 2130 ret = nfs4_open_recover(opendata, state); 2131 if (ret == -ESTALE) 2132 d_drop(ctx->dentry); 2133 nfs4_opendata_put(opendata); 2134 return ret; 2135 } 2136 2137 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2138 { 2139 struct nfs_server *server = NFS_SERVER(state->inode); 2140 struct nfs4_exception exception = { }; 2141 int err; 2142 2143 do { 2144 err = _nfs4_open_expired(ctx, state); 2145 trace_nfs4_open_expired(ctx, 0, err); 2146 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2147 continue; 2148 switch (err) { 2149 default: 2150 goto out; 2151 case -NFS4ERR_GRACE: 2152 case -NFS4ERR_DELAY: 2153 nfs4_handle_exception(server, err, &exception); 2154 err = 0; 2155 } 2156 } while (exception.retry); 2157 out: 2158 return err; 2159 } 2160 2161 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2162 { 2163 struct nfs_open_context *ctx; 2164 int ret; 2165 2166 ctx = nfs4_state_find_open_context(state); 2167 if (IS_ERR(ctx)) 2168 return -EAGAIN; 2169 ret = nfs4_do_open_expired(ctx, state); 2170 put_nfs_open_context(ctx); 2171 return ret; 2172 } 2173 2174 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state) 2175 { 2176 nfs_remove_bad_delegation(state->inode); 2177 write_seqlock(&state->seqlock); 2178 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2179 write_sequnlock(&state->seqlock); 2180 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2181 } 2182 2183 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2184 { 2185 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2186 nfs_finish_clear_delegation_stateid(state); 2187 } 2188 2189 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2190 { 2191 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2192 nfs40_clear_delegation_stateid(state); 2193 return nfs4_open_expired(sp, state); 2194 } 2195 2196 #if defined(CONFIG_NFS_V4_1) 2197 static void nfs41_check_delegation_stateid(struct nfs4_state *state) 2198 { 2199 struct nfs_server *server = NFS_SERVER(state->inode); 2200 nfs4_stateid stateid; 2201 struct nfs_delegation *delegation; 2202 struct rpc_cred *cred; 2203 int status; 2204 2205 /* Get the delegation credential for use by test/free_stateid */ 2206 rcu_read_lock(); 2207 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2208 if (delegation == NULL) { 2209 rcu_read_unlock(); 2210 return; 2211 } 2212 2213 nfs4_stateid_copy(&stateid, &delegation->stateid); 2214 cred = get_rpccred(delegation->cred); 2215 rcu_read_unlock(); 2216 status = nfs41_test_stateid(server, &stateid, cred); 2217 trace_nfs4_test_delegation_stateid(state, NULL, status); 2218 2219 if (status != NFS_OK) { 2220 /* Free the stateid unless the server explicitly 2221 * informs us the stateid is unrecognized. */ 2222 if (status != -NFS4ERR_BAD_STATEID) 2223 nfs41_free_stateid(server, &stateid, cred); 2224 nfs_finish_clear_delegation_stateid(state); 2225 } 2226 2227 put_rpccred(cred); 2228 } 2229 2230 /** 2231 * nfs41_check_open_stateid - possibly free an open stateid 2232 * 2233 * @state: NFSv4 state for an inode 2234 * 2235 * Returns NFS_OK if recovery for this stateid is now finished. 2236 * Otherwise a negative NFS4ERR value is returned. 2237 */ 2238 static int nfs41_check_open_stateid(struct nfs4_state *state) 2239 { 2240 struct nfs_server *server = NFS_SERVER(state->inode); 2241 nfs4_stateid *stateid = &state->open_stateid; 2242 struct rpc_cred *cred = state->owner->so_cred; 2243 int status; 2244 2245 /* If a state reset has been done, test_stateid is unneeded */ 2246 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) && 2247 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) && 2248 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0)) 2249 return -NFS4ERR_BAD_STATEID; 2250 2251 status = nfs41_test_stateid(server, stateid, cred); 2252 trace_nfs4_test_open_stateid(state, NULL, status); 2253 if (status != NFS_OK) { 2254 /* Free the stateid unless the server explicitly 2255 * informs us the stateid is unrecognized. */ 2256 if (status != -NFS4ERR_BAD_STATEID) 2257 nfs41_free_stateid(server, stateid, cred); 2258 2259 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 2260 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 2261 clear_bit(NFS_O_RDWR_STATE, &state->flags); 2262 clear_bit(NFS_OPEN_STATE, &state->flags); 2263 } 2264 return status; 2265 } 2266 2267 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2268 { 2269 int status; 2270 2271 nfs41_check_delegation_stateid(state); 2272 status = nfs41_check_open_stateid(state); 2273 if (status != NFS_OK) 2274 status = nfs4_open_expired(sp, state); 2275 return status; 2276 } 2277 #endif 2278 2279 /* 2280 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2281 * fields corresponding to attributes that were used to store the verifier. 2282 * Make sure we clobber those fields in the later setattr call 2283 */ 2284 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) 2285 { 2286 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && 2287 !(sattr->ia_valid & ATTR_ATIME_SET)) 2288 sattr->ia_valid |= ATTR_ATIME; 2289 2290 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && 2291 !(sattr->ia_valid & ATTR_MTIME_SET)) 2292 sattr->ia_valid |= ATTR_MTIME; 2293 } 2294 2295 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 2296 fmode_t fmode, 2297 int flags, 2298 struct nfs_open_context *ctx) 2299 { 2300 struct nfs4_state_owner *sp = opendata->owner; 2301 struct nfs_server *server = sp->so_server; 2302 struct dentry *dentry; 2303 struct nfs4_state *state; 2304 unsigned int seq; 2305 int ret; 2306 2307 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 2308 2309 ret = _nfs4_proc_open(opendata); 2310 if (ret != 0) 2311 goto out; 2312 2313 state = nfs4_opendata_to_nfs4_state(opendata); 2314 ret = PTR_ERR(state); 2315 if (IS_ERR(state)) 2316 goto out; 2317 if (server->caps & NFS_CAP_POSIX_LOCK) 2318 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 2319 2320 dentry = opendata->dentry; 2321 if (d_really_is_negative(dentry)) { 2322 /* FIXME: Is this d_drop() ever needed? */ 2323 d_drop(dentry); 2324 dentry = d_add_unique(dentry, igrab(state->inode)); 2325 if (dentry == NULL) { 2326 dentry = opendata->dentry; 2327 } else if (dentry != ctx->dentry) { 2328 dput(ctx->dentry); 2329 ctx->dentry = dget(dentry); 2330 } 2331 nfs_set_verifier(dentry, 2332 nfs_save_change_attribute(d_inode(opendata->dir))); 2333 } 2334 2335 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags); 2336 if (ret != 0) 2337 goto out; 2338 2339 ctx->state = state; 2340 if (d_inode(dentry) == state->inode) { 2341 nfs_inode_attach_open_context(ctx); 2342 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 2343 nfs4_schedule_stateid_recovery(server, state); 2344 } 2345 out: 2346 return ret; 2347 } 2348 2349 /* 2350 * Returns a referenced nfs4_state 2351 */ 2352 static int _nfs4_do_open(struct inode *dir, 2353 struct nfs_open_context *ctx, 2354 int flags, 2355 struct iattr *sattr, 2356 struct nfs4_label *label, 2357 int *opened) 2358 { 2359 struct nfs4_state_owner *sp; 2360 struct nfs4_state *state = NULL; 2361 struct nfs_server *server = NFS_SERVER(dir); 2362 struct nfs4_opendata *opendata; 2363 struct dentry *dentry = ctx->dentry; 2364 struct rpc_cred *cred = ctx->cred; 2365 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 2366 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 2367 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 2368 struct nfs4_label *olabel = NULL; 2369 int status; 2370 2371 /* Protect against reboot recovery conflicts */ 2372 status = -ENOMEM; 2373 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 2374 if (sp == NULL) { 2375 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 2376 goto out_err; 2377 } 2378 status = nfs4_recover_expired_lease(server); 2379 if (status != 0) 2380 goto err_put_state_owner; 2381 if (d_really_is_positive(dentry)) 2382 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 2383 status = -ENOMEM; 2384 if (d_really_is_positive(dentry)) 2385 claim = NFS4_OPEN_CLAIM_FH; 2386 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, 2387 label, claim, GFP_KERNEL); 2388 if (opendata == NULL) 2389 goto err_put_state_owner; 2390 2391 if (label) { 2392 olabel = nfs4_label_alloc(server, GFP_KERNEL); 2393 if (IS_ERR(olabel)) { 2394 status = PTR_ERR(olabel); 2395 goto err_opendata_put; 2396 } 2397 } 2398 2399 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 2400 if (!opendata->f_attr.mdsthreshold) { 2401 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 2402 if (!opendata->f_attr.mdsthreshold) 2403 goto err_free_label; 2404 } 2405 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 2406 } 2407 if (d_really_is_positive(dentry)) 2408 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 2409 2410 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx); 2411 if (status != 0) 2412 goto err_free_label; 2413 state = ctx->state; 2414 2415 if ((opendata->o_arg.open_flags & O_EXCL) && 2416 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 2417 nfs4_exclusive_attrset(opendata, sattr); 2418 2419 nfs_fattr_init(opendata->o_res.f_attr); 2420 status = nfs4_do_setattr(state->inode, cred, 2421 opendata->o_res.f_attr, sattr, 2422 state, label, olabel); 2423 if (status == 0) { 2424 nfs_setattr_update_inode(state->inode, sattr, 2425 opendata->o_res.f_attr); 2426 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); 2427 } 2428 } 2429 if (opendata->file_created) 2430 *opened |= FILE_CREATED; 2431 2432 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 2433 *ctx_th = opendata->f_attr.mdsthreshold; 2434 opendata->f_attr.mdsthreshold = NULL; 2435 } 2436 2437 nfs4_label_free(olabel); 2438 2439 nfs4_opendata_put(opendata); 2440 nfs4_put_state_owner(sp); 2441 return 0; 2442 err_free_label: 2443 nfs4_label_free(olabel); 2444 err_opendata_put: 2445 nfs4_opendata_put(opendata); 2446 err_put_state_owner: 2447 nfs4_put_state_owner(sp); 2448 out_err: 2449 return status; 2450 } 2451 2452 2453 static struct nfs4_state *nfs4_do_open(struct inode *dir, 2454 struct nfs_open_context *ctx, 2455 int flags, 2456 struct iattr *sattr, 2457 struct nfs4_label *label, 2458 int *opened) 2459 { 2460 struct nfs_server *server = NFS_SERVER(dir); 2461 struct nfs4_exception exception = { }; 2462 struct nfs4_state *res; 2463 int status; 2464 2465 do { 2466 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened); 2467 res = ctx->state; 2468 trace_nfs4_open_file(ctx, flags, status); 2469 if (status == 0) 2470 break; 2471 /* NOTE: BAD_SEQID means the server and client disagree about the 2472 * book-keeping w.r.t. state-changing operations 2473 * (OPEN/CLOSE/LOCK/LOCKU...) 2474 * It is actually a sign of a bug on the client or on the server. 2475 * 2476 * If we receive a BAD_SEQID error in the particular case of 2477 * doing an OPEN, we assume that nfs_increment_open_seqid() will 2478 * have unhashed the old state_owner for us, and that we can 2479 * therefore safely retry using a new one. We should still warn 2480 * the user though... 2481 */ 2482 if (status == -NFS4ERR_BAD_SEQID) { 2483 pr_warn_ratelimited("NFS: v4 server %s " 2484 " returned a bad sequence-id error!\n", 2485 NFS_SERVER(dir)->nfs_client->cl_hostname); 2486 exception.retry = 1; 2487 continue; 2488 } 2489 /* 2490 * BAD_STATEID on OPEN means that the server cancelled our 2491 * state before it received the OPEN_CONFIRM. 2492 * Recover by retrying the request as per the discussion 2493 * on Page 181 of RFC3530. 2494 */ 2495 if (status == -NFS4ERR_BAD_STATEID) { 2496 exception.retry = 1; 2497 continue; 2498 } 2499 if (status == -EAGAIN) { 2500 /* We must have found a delegation */ 2501 exception.retry = 1; 2502 continue; 2503 } 2504 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 2505 continue; 2506 res = ERR_PTR(nfs4_handle_exception(server, 2507 status, &exception)); 2508 } while (exception.retry); 2509 return res; 2510 } 2511 2512 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 2513 struct nfs_fattr *fattr, struct iattr *sattr, 2514 struct nfs4_state *state, struct nfs4_label *ilabel, 2515 struct nfs4_label *olabel) 2516 { 2517 struct nfs_server *server = NFS_SERVER(inode); 2518 struct nfs_setattrargs arg = { 2519 .fh = NFS_FH(inode), 2520 .iap = sattr, 2521 .server = server, 2522 .bitmask = server->attr_bitmask, 2523 .label = ilabel, 2524 }; 2525 struct nfs_setattrres res = { 2526 .fattr = fattr, 2527 .label = olabel, 2528 .server = server, 2529 }; 2530 struct rpc_message msg = { 2531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 2532 .rpc_argp = &arg, 2533 .rpc_resp = &res, 2534 .rpc_cred = cred, 2535 }; 2536 unsigned long timestamp = jiffies; 2537 fmode_t fmode; 2538 bool truncate; 2539 int status; 2540 2541 arg.bitmask = nfs4_bitmask(server, ilabel); 2542 if (ilabel) 2543 arg.bitmask = nfs4_bitmask(server, olabel); 2544 2545 nfs_fattr_init(fattr); 2546 2547 /* Servers should only apply open mode checks for file size changes */ 2548 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false; 2549 fmode = truncate ? FMODE_WRITE : FMODE_READ; 2550 2551 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) { 2552 /* Use that stateid */ 2553 } else if (truncate && state != NULL) { 2554 struct nfs_lockowner lockowner = { 2555 .l_owner = current->files, 2556 .l_pid = current->tgid, 2557 }; 2558 if (!nfs4_valid_open_stateid(state)) 2559 return -EBADF; 2560 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE, 2561 &lockowner) == -EIO) 2562 return -EBADF; 2563 } else 2564 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 2565 2566 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 2567 if (status == 0 && state != NULL) 2568 renew_lease(server, timestamp); 2569 return status; 2570 } 2571 2572 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 2573 struct nfs_fattr *fattr, struct iattr *sattr, 2574 struct nfs4_state *state, struct nfs4_label *ilabel, 2575 struct nfs4_label *olabel) 2576 { 2577 struct nfs_server *server = NFS_SERVER(inode); 2578 struct nfs4_exception exception = { 2579 .state = state, 2580 .inode = inode, 2581 }; 2582 int err; 2583 do { 2584 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel); 2585 trace_nfs4_setattr(inode, err); 2586 switch (err) { 2587 case -NFS4ERR_OPENMODE: 2588 if (!(sattr->ia_valid & ATTR_SIZE)) { 2589 pr_warn_once("NFSv4: server %s is incorrectly " 2590 "applying open mode checks to " 2591 "a SETATTR that is not " 2592 "changing file size.\n", 2593 server->nfs_client->cl_hostname); 2594 } 2595 if (state && !(state->state & FMODE_WRITE)) { 2596 err = -EBADF; 2597 if (sattr->ia_valid & ATTR_OPEN) 2598 err = -EACCES; 2599 goto out; 2600 } 2601 } 2602 err = nfs4_handle_exception(server, err, &exception); 2603 } while (exception.retry); 2604 out: 2605 return err; 2606 } 2607 2608 struct nfs4_closedata { 2609 struct inode *inode; 2610 struct nfs4_state *state; 2611 struct nfs_closeargs arg; 2612 struct nfs_closeres res; 2613 struct nfs_fattr fattr; 2614 unsigned long timestamp; 2615 bool roc; 2616 u32 roc_barrier; 2617 }; 2618 2619 static void nfs4_free_closedata(void *data) 2620 { 2621 struct nfs4_closedata *calldata = data; 2622 struct nfs4_state_owner *sp = calldata->state->owner; 2623 struct super_block *sb = calldata->state->inode->i_sb; 2624 2625 if (calldata->roc) 2626 pnfs_roc_release(calldata->state->inode); 2627 nfs4_put_open_state(calldata->state); 2628 nfs_free_seqid(calldata->arg.seqid); 2629 nfs4_put_state_owner(sp); 2630 nfs_sb_deactive(sb); 2631 kfree(calldata); 2632 } 2633 2634 static void nfs4_close_done(struct rpc_task *task, void *data) 2635 { 2636 struct nfs4_closedata *calldata = data; 2637 struct nfs4_state *state = calldata->state; 2638 struct nfs_server *server = NFS_SERVER(calldata->inode); 2639 nfs4_stateid *res_stateid = NULL; 2640 2641 dprintk("%s: begin!\n", __func__); 2642 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 2643 return; 2644 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 2645 /* hmm. we are done with the inode, and in the process of freeing 2646 * the state_owner. we keep this around to process errors 2647 */ 2648 switch (task->tk_status) { 2649 case 0: 2650 res_stateid = &calldata->res.stateid; 2651 if (calldata->arg.fmode == 0 && calldata->roc) 2652 pnfs_roc_set_barrier(state->inode, 2653 calldata->roc_barrier); 2654 renew_lease(server, calldata->timestamp); 2655 break; 2656 case -NFS4ERR_ADMIN_REVOKED: 2657 case -NFS4ERR_STALE_STATEID: 2658 case -NFS4ERR_OLD_STATEID: 2659 case -NFS4ERR_BAD_STATEID: 2660 case -NFS4ERR_EXPIRED: 2661 if (!nfs4_stateid_match(&calldata->arg.stateid, 2662 &state->open_stateid)) { 2663 rpc_restart_call_prepare(task); 2664 goto out_release; 2665 } 2666 if (calldata->arg.fmode == 0) 2667 break; 2668 default: 2669 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) { 2670 rpc_restart_call_prepare(task); 2671 goto out_release; 2672 } 2673 } 2674 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode); 2675 out_release: 2676 nfs_release_seqid(calldata->arg.seqid); 2677 nfs_refresh_inode(calldata->inode, calldata->res.fattr); 2678 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); 2679 } 2680 2681 static void nfs4_close_prepare(struct rpc_task *task, void *data) 2682 { 2683 struct nfs4_closedata *calldata = data; 2684 struct nfs4_state *state = calldata->state; 2685 struct inode *inode = calldata->inode; 2686 bool is_rdonly, is_wronly, is_rdwr; 2687 int call_close = 0; 2688 2689 dprintk("%s: begin!\n", __func__); 2690 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 2691 goto out_wait; 2692 2693 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 2694 spin_lock(&state->owner->so_lock); 2695 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 2696 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 2697 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 2698 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid); 2699 /* Calculate the change in open mode */ 2700 calldata->arg.fmode = 0; 2701 if (state->n_rdwr == 0) { 2702 if (state->n_rdonly == 0) 2703 call_close |= is_rdonly; 2704 else if (is_rdonly) 2705 calldata->arg.fmode |= FMODE_READ; 2706 if (state->n_wronly == 0) 2707 call_close |= is_wronly; 2708 else if (is_wronly) 2709 calldata->arg.fmode |= FMODE_WRITE; 2710 } else if (is_rdwr) 2711 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 2712 2713 if (calldata->arg.fmode == 0) 2714 call_close |= is_rdwr; 2715 2716 if (!nfs4_valid_open_stateid(state)) 2717 call_close = 0; 2718 spin_unlock(&state->owner->so_lock); 2719 2720 if (!call_close) { 2721 /* Note: exit _without_ calling nfs4_close_done */ 2722 goto out_no_action; 2723 } 2724 2725 if (calldata->arg.fmode == 0) { 2726 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 2727 if (calldata->roc && 2728 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) { 2729 nfs_release_seqid(calldata->arg.seqid); 2730 goto out_wait; 2731 } 2732 } 2733 calldata->arg.share_access = 2734 nfs4_map_atomic_open_share(NFS_SERVER(inode), 2735 calldata->arg.fmode, 0); 2736 2737 nfs_fattr_init(calldata->res.fattr); 2738 calldata->timestamp = jiffies; 2739 if (nfs4_setup_sequence(NFS_SERVER(inode), 2740 &calldata->arg.seq_args, 2741 &calldata->res.seq_res, 2742 task) != 0) 2743 nfs_release_seqid(calldata->arg.seqid); 2744 dprintk("%s: done!\n", __func__); 2745 return; 2746 out_no_action: 2747 task->tk_action = NULL; 2748 out_wait: 2749 nfs4_sequence_done(task, &calldata->res.seq_res); 2750 } 2751 2752 static const struct rpc_call_ops nfs4_close_ops = { 2753 .rpc_call_prepare = nfs4_close_prepare, 2754 .rpc_call_done = nfs4_close_done, 2755 .rpc_release = nfs4_free_closedata, 2756 }; 2757 2758 static bool nfs4_roc(struct inode *inode) 2759 { 2760 if (!nfs_have_layout(inode)) 2761 return false; 2762 return pnfs_roc(inode); 2763 } 2764 2765 /* 2766 * It is possible for data to be read/written from a mem-mapped file 2767 * after the sys_close call (which hits the vfs layer as a flush). 2768 * This means that we can't safely call nfsv4 close on a file until 2769 * the inode is cleared. This in turn means that we are not good 2770 * NFSv4 citizens - we do not indicate to the server to update the file's 2771 * share state even when we are done with one of the three share 2772 * stateid's in the inode. 2773 * 2774 * NOTE: Caller must be holding the sp->so_owner semaphore! 2775 */ 2776 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 2777 { 2778 struct nfs_server *server = NFS_SERVER(state->inode); 2779 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 2780 struct nfs4_closedata *calldata; 2781 struct nfs4_state_owner *sp = state->owner; 2782 struct rpc_task *task; 2783 struct rpc_message msg = { 2784 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 2785 .rpc_cred = state->owner->so_cred, 2786 }; 2787 struct rpc_task_setup task_setup_data = { 2788 .rpc_client = server->client, 2789 .rpc_message = &msg, 2790 .callback_ops = &nfs4_close_ops, 2791 .workqueue = nfsiod_workqueue, 2792 .flags = RPC_TASK_ASYNC, 2793 }; 2794 int status = -ENOMEM; 2795 2796 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 2797 &task_setup_data.rpc_client, &msg); 2798 2799 calldata = kzalloc(sizeof(*calldata), gfp_mask); 2800 if (calldata == NULL) 2801 goto out; 2802 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1); 2803 calldata->inode = state->inode; 2804 calldata->state = state; 2805 calldata->arg.fh = NFS_FH(state->inode); 2806 /* Serialization for the sequence id */ 2807 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 2808 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 2809 if (IS_ERR(calldata->arg.seqid)) 2810 goto out_free_calldata; 2811 calldata->arg.fmode = 0; 2812 calldata->arg.bitmask = server->cache_consistency_bitmask; 2813 calldata->res.fattr = &calldata->fattr; 2814 calldata->res.seqid = calldata->arg.seqid; 2815 calldata->res.server = server; 2816 calldata->roc = nfs4_roc(state->inode); 2817 nfs_sb_active(calldata->inode->i_sb); 2818 2819 msg.rpc_argp = &calldata->arg; 2820 msg.rpc_resp = &calldata->res; 2821 task_setup_data.callback_data = calldata; 2822 task = rpc_run_task(&task_setup_data); 2823 if (IS_ERR(task)) 2824 return PTR_ERR(task); 2825 status = 0; 2826 if (wait) 2827 status = rpc_wait_for_completion_task(task); 2828 rpc_put_task(task); 2829 return status; 2830 out_free_calldata: 2831 kfree(calldata); 2832 out: 2833 nfs4_put_open_state(state); 2834 nfs4_put_state_owner(sp); 2835 return status; 2836 } 2837 2838 static struct inode * 2839 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 2840 int open_flags, struct iattr *attr, int *opened) 2841 { 2842 struct nfs4_state *state; 2843 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 2844 2845 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 2846 2847 /* Protect against concurrent sillydeletes */ 2848 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 2849 2850 nfs4_label_release_security(label); 2851 2852 if (IS_ERR(state)) 2853 return ERR_CAST(state); 2854 return state->inode; 2855 } 2856 2857 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 2858 { 2859 if (ctx->state == NULL) 2860 return; 2861 if (is_sync) 2862 nfs4_close_sync(ctx->state, ctx->mode); 2863 else 2864 nfs4_close_state(ctx->state, ctx->mode); 2865 } 2866 2867 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 2868 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 2869 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL) 2870 2871 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 2872 { 2873 struct nfs4_server_caps_arg args = { 2874 .fhandle = fhandle, 2875 }; 2876 struct nfs4_server_caps_res res = {}; 2877 struct rpc_message msg = { 2878 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 2879 .rpc_argp = &args, 2880 .rpc_resp = &res, 2881 }; 2882 int status; 2883 2884 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 2885 if (status == 0) { 2886 /* Sanity check the server answers */ 2887 switch (server->nfs_client->cl_minorversion) { 2888 case 0: 2889 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 2890 res.attr_bitmask[2] = 0; 2891 break; 2892 case 1: 2893 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 2894 break; 2895 case 2: 2896 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 2897 } 2898 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 2899 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| 2900 NFS_CAP_SYMLINKS|NFS_CAP_FILEID| 2901 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| 2902 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| 2903 NFS_CAP_CTIME|NFS_CAP_MTIME| 2904 NFS_CAP_SECURITY_LABEL); 2905 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 2906 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 2907 server->caps |= NFS_CAP_ACLS; 2908 if (res.has_links != 0) 2909 server->caps |= NFS_CAP_HARDLINKS; 2910 if (res.has_symlinks != 0) 2911 server->caps |= NFS_CAP_SYMLINKS; 2912 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) 2913 server->caps |= NFS_CAP_FILEID; 2914 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) 2915 server->caps |= NFS_CAP_MODE; 2916 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) 2917 server->caps |= NFS_CAP_NLINK; 2918 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) 2919 server->caps |= NFS_CAP_OWNER; 2920 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) 2921 server->caps |= NFS_CAP_OWNER_GROUP; 2922 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) 2923 server->caps |= NFS_CAP_ATIME; 2924 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) 2925 server->caps |= NFS_CAP_CTIME; 2926 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) 2927 server->caps |= NFS_CAP_MTIME; 2928 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 2929 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 2930 server->caps |= NFS_CAP_SECURITY_LABEL; 2931 #endif 2932 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 2933 sizeof(server->attr_bitmask)); 2934 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 2935 2936 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 2937 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 2938 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 2939 server->cache_consistency_bitmask[2] = 0; 2940 server->acl_bitmask = res.acl_bitmask; 2941 server->fh_expire_type = res.fh_expire_type; 2942 } 2943 2944 return status; 2945 } 2946 2947 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 2948 { 2949 struct nfs4_exception exception = { }; 2950 int err; 2951 do { 2952 err = nfs4_handle_exception(server, 2953 _nfs4_server_capabilities(server, fhandle), 2954 &exception); 2955 } while (exception.retry); 2956 return err; 2957 } 2958 2959 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 2960 struct nfs_fsinfo *info) 2961 { 2962 u32 bitmask[3]; 2963 struct nfs4_lookup_root_arg args = { 2964 .bitmask = bitmask, 2965 }; 2966 struct nfs4_lookup_res res = { 2967 .server = server, 2968 .fattr = info->fattr, 2969 .fh = fhandle, 2970 }; 2971 struct rpc_message msg = { 2972 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 2973 .rpc_argp = &args, 2974 .rpc_resp = &res, 2975 }; 2976 2977 bitmask[0] = nfs4_fattr_bitmap[0]; 2978 bitmask[1] = nfs4_fattr_bitmap[1]; 2979 /* 2980 * Process the label in the upcoming getfattr 2981 */ 2982 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 2983 2984 nfs_fattr_init(info->fattr); 2985 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 2986 } 2987 2988 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 2989 struct nfs_fsinfo *info) 2990 { 2991 struct nfs4_exception exception = { }; 2992 int err; 2993 do { 2994 err = _nfs4_lookup_root(server, fhandle, info); 2995 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 2996 switch (err) { 2997 case 0: 2998 case -NFS4ERR_WRONGSEC: 2999 goto out; 3000 default: 3001 err = nfs4_handle_exception(server, err, &exception); 3002 } 3003 } while (exception.retry); 3004 out: 3005 return err; 3006 } 3007 3008 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3009 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 3010 { 3011 struct rpc_auth_create_args auth_args = { 3012 .pseudoflavor = flavor, 3013 }; 3014 struct rpc_auth *auth; 3015 int ret; 3016 3017 auth = rpcauth_create(&auth_args, server->client); 3018 if (IS_ERR(auth)) { 3019 ret = -EACCES; 3020 goto out; 3021 } 3022 ret = nfs4_lookup_root(server, fhandle, info); 3023 out: 3024 return ret; 3025 } 3026 3027 /* 3028 * Retry pseudoroot lookup with various security flavors. We do this when: 3029 * 3030 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 3031 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 3032 * 3033 * Returns zero on success, or a negative NFS4ERR value, or a 3034 * negative errno value. 3035 */ 3036 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3037 struct nfs_fsinfo *info) 3038 { 3039 /* Per 3530bis 15.33.5 */ 3040 static const rpc_authflavor_t flav_array[] = { 3041 RPC_AUTH_GSS_KRB5P, 3042 RPC_AUTH_GSS_KRB5I, 3043 RPC_AUTH_GSS_KRB5, 3044 RPC_AUTH_UNIX, /* courtesy */ 3045 RPC_AUTH_NULL, 3046 }; 3047 int status = -EPERM; 3048 size_t i; 3049 3050 if (server->auth_info.flavor_len > 0) { 3051 /* try each flavor specified by user */ 3052 for (i = 0; i < server->auth_info.flavor_len; i++) { 3053 status = nfs4_lookup_root_sec(server, fhandle, info, 3054 server->auth_info.flavors[i]); 3055 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3056 continue; 3057 break; 3058 } 3059 } else { 3060 /* no flavors specified by user, try default list */ 3061 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 3062 status = nfs4_lookup_root_sec(server, fhandle, info, 3063 flav_array[i]); 3064 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3065 continue; 3066 break; 3067 } 3068 } 3069 3070 /* 3071 * -EACCESS could mean that the user doesn't have correct permissions 3072 * to access the mount. It could also mean that we tried to mount 3073 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 3074 * existing mount programs don't handle -EACCES very well so it should 3075 * be mapped to -EPERM instead. 3076 */ 3077 if (status == -EACCES) 3078 status = -EPERM; 3079 return status; 3080 } 3081 3082 static int nfs4_do_find_root_sec(struct nfs_server *server, 3083 struct nfs_fh *fhandle, struct nfs_fsinfo *info) 3084 { 3085 int mv = server->nfs_client->cl_minorversion; 3086 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info); 3087 } 3088 3089 /** 3090 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 3091 * @server: initialized nfs_server handle 3092 * @fhandle: we fill in the pseudo-fs root file handle 3093 * @info: we fill in an FSINFO struct 3094 * @auth_probe: probe the auth flavours 3095 * 3096 * Returns zero on success, or a negative errno. 3097 */ 3098 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 3099 struct nfs_fsinfo *info, 3100 bool auth_probe) 3101 { 3102 int status = 0; 3103 3104 if (!auth_probe) 3105 status = nfs4_lookup_root(server, fhandle, info); 3106 3107 if (auth_probe || status == NFS4ERR_WRONGSEC) 3108 status = nfs4_do_find_root_sec(server, fhandle, info); 3109 3110 if (status == 0) 3111 status = nfs4_server_capabilities(server, fhandle); 3112 if (status == 0) 3113 status = nfs4_do_fsinfo(server, fhandle, info); 3114 3115 return nfs4_map_errors(status); 3116 } 3117 3118 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 3119 struct nfs_fsinfo *info) 3120 { 3121 int error; 3122 struct nfs_fattr *fattr = info->fattr; 3123 struct nfs4_label *label = NULL; 3124 3125 error = nfs4_server_capabilities(server, mntfh); 3126 if (error < 0) { 3127 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 3128 return error; 3129 } 3130 3131 label = nfs4_label_alloc(server, GFP_KERNEL); 3132 if (IS_ERR(label)) 3133 return PTR_ERR(label); 3134 3135 error = nfs4_proc_getattr(server, mntfh, fattr, label); 3136 if (error < 0) { 3137 dprintk("nfs4_get_root: getattr error = %d\n", -error); 3138 goto err_free_label; 3139 } 3140 3141 if (fattr->valid & NFS_ATTR_FATTR_FSID && 3142 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 3143 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 3144 3145 err_free_label: 3146 nfs4_label_free(label); 3147 3148 return error; 3149 } 3150 3151 /* 3152 * Get locations and (maybe) other attributes of a referral. 3153 * Note that we'll actually follow the referral later when 3154 * we detect fsid mismatch in inode revalidation 3155 */ 3156 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 3157 const struct qstr *name, struct nfs_fattr *fattr, 3158 struct nfs_fh *fhandle) 3159 { 3160 int status = -ENOMEM; 3161 struct page *page = NULL; 3162 struct nfs4_fs_locations *locations = NULL; 3163 3164 page = alloc_page(GFP_KERNEL); 3165 if (page == NULL) 3166 goto out; 3167 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 3168 if (locations == NULL) 3169 goto out; 3170 3171 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 3172 if (status != 0) 3173 goto out; 3174 3175 /* 3176 * If the fsid didn't change, this is a migration event, not a 3177 * referral. Cause us to drop into the exception handler, which 3178 * will kick off migration recovery. 3179 */ 3180 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 3181 dprintk("%s: server did not return a different fsid for" 3182 " a referral at %s\n", __func__, name->name); 3183 status = -NFS4ERR_MOVED; 3184 goto out; 3185 } 3186 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 3187 nfs_fixup_referral_attributes(&locations->fattr); 3188 3189 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 3190 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 3191 memset(fhandle, 0, sizeof(struct nfs_fh)); 3192 out: 3193 if (page) 3194 __free_page(page); 3195 kfree(locations); 3196 return status; 3197 } 3198 3199 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3200 struct nfs_fattr *fattr, struct nfs4_label *label) 3201 { 3202 struct nfs4_getattr_arg args = { 3203 .fh = fhandle, 3204 .bitmask = server->attr_bitmask, 3205 }; 3206 struct nfs4_getattr_res res = { 3207 .fattr = fattr, 3208 .label = label, 3209 .server = server, 3210 }; 3211 struct rpc_message msg = { 3212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 3213 .rpc_argp = &args, 3214 .rpc_resp = &res, 3215 }; 3216 3217 args.bitmask = nfs4_bitmask(server, label); 3218 3219 nfs_fattr_init(fattr); 3220 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3221 } 3222 3223 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3224 struct nfs_fattr *fattr, struct nfs4_label *label) 3225 { 3226 struct nfs4_exception exception = { }; 3227 int err; 3228 do { 3229 err = _nfs4_proc_getattr(server, fhandle, fattr, label); 3230 trace_nfs4_getattr(server, fhandle, fattr, err); 3231 err = nfs4_handle_exception(server, err, 3232 &exception); 3233 } while (exception.retry); 3234 return err; 3235 } 3236 3237 /* 3238 * The file is not closed if it is opened due to the a request to change 3239 * the size of the file. The open call will not be needed once the 3240 * VFS layer lookup-intents are implemented. 3241 * 3242 * Close is called when the inode is destroyed. 3243 * If we haven't opened the file for O_WRONLY, we 3244 * need to in the size_change case to obtain a stateid. 3245 * 3246 * Got race? 3247 * Because OPEN is always done by name in nfsv4, it is 3248 * possible that we opened a different file by the same 3249 * name. We can recognize this race condition, but we 3250 * can't do anything about it besides returning an error. 3251 * 3252 * This will be fixed with VFS changes (lookup-intent). 3253 */ 3254 static int 3255 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 3256 struct iattr *sattr) 3257 { 3258 struct inode *inode = d_inode(dentry); 3259 struct rpc_cred *cred = NULL; 3260 struct nfs4_state *state = NULL; 3261 struct nfs4_label *label = NULL; 3262 int status; 3263 3264 if (pnfs_ld_layoutret_on_setattr(inode) && 3265 sattr->ia_valid & ATTR_SIZE && 3266 sattr->ia_size < i_size_read(inode)) 3267 pnfs_commit_and_return_layout(inode); 3268 3269 nfs_fattr_init(fattr); 3270 3271 /* Deal with open(O_TRUNC) */ 3272 if (sattr->ia_valid & ATTR_OPEN) 3273 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 3274 3275 /* Optimization: if the end result is no change, don't RPC */ 3276 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 3277 return 0; 3278 3279 /* Search for an existing open(O_WRITE) file */ 3280 if (sattr->ia_valid & ATTR_FILE) { 3281 struct nfs_open_context *ctx; 3282 3283 ctx = nfs_file_open_context(sattr->ia_file); 3284 if (ctx) { 3285 cred = ctx->cred; 3286 state = ctx->state; 3287 } 3288 } 3289 3290 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 3291 if (IS_ERR(label)) 3292 return PTR_ERR(label); 3293 3294 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label); 3295 if (status == 0) { 3296 nfs_setattr_update_inode(inode, sattr, fattr); 3297 nfs_setsecurity(inode, fattr, label); 3298 } 3299 nfs4_label_free(label); 3300 return status; 3301 } 3302 3303 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 3304 const struct qstr *name, struct nfs_fh *fhandle, 3305 struct nfs_fattr *fattr, struct nfs4_label *label) 3306 { 3307 struct nfs_server *server = NFS_SERVER(dir); 3308 int status; 3309 struct nfs4_lookup_arg args = { 3310 .bitmask = server->attr_bitmask, 3311 .dir_fh = NFS_FH(dir), 3312 .name = name, 3313 }; 3314 struct nfs4_lookup_res res = { 3315 .server = server, 3316 .fattr = fattr, 3317 .label = label, 3318 .fh = fhandle, 3319 }; 3320 struct rpc_message msg = { 3321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 3322 .rpc_argp = &args, 3323 .rpc_resp = &res, 3324 }; 3325 3326 args.bitmask = nfs4_bitmask(server, label); 3327 3328 nfs_fattr_init(fattr); 3329 3330 dprintk("NFS call lookup %s\n", name->name); 3331 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); 3332 dprintk("NFS reply lookup: %d\n", status); 3333 return status; 3334 } 3335 3336 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 3337 { 3338 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 3339 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 3340 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 3341 fattr->nlink = 2; 3342 } 3343 3344 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 3345 struct qstr *name, struct nfs_fh *fhandle, 3346 struct nfs_fattr *fattr, struct nfs4_label *label) 3347 { 3348 struct nfs4_exception exception = { }; 3349 struct rpc_clnt *client = *clnt; 3350 int err; 3351 do { 3352 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label); 3353 trace_nfs4_lookup(dir, name, err); 3354 switch (err) { 3355 case -NFS4ERR_BADNAME: 3356 err = -ENOENT; 3357 goto out; 3358 case -NFS4ERR_MOVED: 3359 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 3360 if (err == -NFS4ERR_MOVED) 3361 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 3362 goto out; 3363 case -NFS4ERR_WRONGSEC: 3364 err = -EPERM; 3365 if (client != *clnt) 3366 goto out; 3367 client = nfs4_negotiate_security(client, dir, name); 3368 if (IS_ERR(client)) 3369 return PTR_ERR(client); 3370 3371 exception.retry = 1; 3372 break; 3373 default: 3374 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 3375 } 3376 } while (exception.retry); 3377 3378 out: 3379 if (err == 0) 3380 *clnt = client; 3381 else if (client != *clnt) 3382 rpc_shutdown_client(client); 3383 3384 return err; 3385 } 3386 3387 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, 3388 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 3389 struct nfs4_label *label) 3390 { 3391 int status; 3392 struct rpc_clnt *client = NFS_CLIENT(dir); 3393 3394 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label); 3395 if (client != NFS_CLIENT(dir)) { 3396 rpc_shutdown_client(client); 3397 nfs_fixup_secinfo_attributes(fattr); 3398 } 3399 return status; 3400 } 3401 3402 struct rpc_clnt * 3403 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name, 3404 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 3405 { 3406 struct rpc_clnt *client = NFS_CLIENT(dir); 3407 int status; 3408 3409 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL); 3410 if (status < 0) 3411 return ERR_PTR(status); 3412 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 3413 } 3414 3415 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 3416 { 3417 struct nfs_server *server = NFS_SERVER(inode); 3418 struct nfs4_accessargs args = { 3419 .fh = NFS_FH(inode), 3420 .bitmask = server->cache_consistency_bitmask, 3421 }; 3422 struct nfs4_accessres res = { 3423 .server = server, 3424 }; 3425 struct rpc_message msg = { 3426 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 3427 .rpc_argp = &args, 3428 .rpc_resp = &res, 3429 .rpc_cred = entry->cred, 3430 }; 3431 int mode = entry->mask; 3432 int status = 0; 3433 3434 /* 3435 * Determine which access bits we want to ask for... 3436 */ 3437 if (mode & MAY_READ) 3438 args.access |= NFS4_ACCESS_READ; 3439 if (S_ISDIR(inode->i_mode)) { 3440 if (mode & MAY_WRITE) 3441 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; 3442 if (mode & MAY_EXEC) 3443 args.access |= NFS4_ACCESS_LOOKUP; 3444 } else { 3445 if (mode & MAY_WRITE) 3446 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; 3447 if (mode & MAY_EXEC) 3448 args.access |= NFS4_ACCESS_EXECUTE; 3449 } 3450 3451 res.fattr = nfs_alloc_fattr(); 3452 if (res.fattr == NULL) 3453 return -ENOMEM; 3454 3455 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3456 if (!status) { 3457 nfs_access_set_mask(entry, res.access); 3458 nfs_refresh_inode(inode, res.fattr); 3459 } 3460 nfs_free_fattr(res.fattr); 3461 return status; 3462 } 3463 3464 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 3465 { 3466 struct nfs4_exception exception = { }; 3467 int err; 3468 do { 3469 err = _nfs4_proc_access(inode, entry); 3470 trace_nfs4_access(inode, err); 3471 err = nfs4_handle_exception(NFS_SERVER(inode), err, 3472 &exception); 3473 } while (exception.retry); 3474 return err; 3475 } 3476 3477 /* 3478 * TODO: For the time being, we don't try to get any attributes 3479 * along with any of the zero-copy operations READ, READDIR, 3480 * READLINK, WRITE. 3481 * 3482 * In the case of the first three, we want to put the GETATTR 3483 * after the read-type operation -- this is because it is hard 3484 * to predict the length of a GETATTR response in v4, and thus 3485 * align the READ data correctly. This means that the GETATTR 3486 * may end up partially falling into the page cache, and we should 3487 * shift it into the 'tail' of the xdr_buf before processing. 3488 * To do this efficiently, we need to know the total length 3489 * of data received, which doesn't seem to be available outside 3490 * of the RPC layer. 3491 * 3492 * In the case of WRITE, we also want to put the GETATTR after 3493 * the operation -- in this case because we want to make sure 3494 * we get the post-operation mtime and size. 3495 * 3496 * Both of these changes to the XDR layer would in fact be quite 3497 * minor, but I decided to leave them for a subsequent patch. 3498 */ 3499 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 3500 unsigned int pgbase, unsigned int pglen) 3501 { 3502 struct nfs4_readlink args = { 3503 .fh = NFS_FH(inode), 3504 .pgbase = pgbase, 3505 .pglen = pglen, 3506 .pages = &page, 3507 }; 3508 struct nfs4_readlink_res res; 3509 struct rpc_message msg = { 3510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 3511 .rpc_argp = &args, 3512 .rpc_resp = &res, 3513 }; 3514 3515 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 3516 } 3517 3518 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 3519 unsigned int pgbase, unsigned int pglen) 3520 { 3521 struct nfs4_exception exception = { }; 3522 int err; 3523 do { 3524 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 3525 trace_nfs4_readlink(inode, err); 3526 err = nfs4_handle_exception(NFS_SERVER(inode), err, 3527 &exception); 3528 } while (exception.retry); 3529 return err; 3530 } 3531 3532 /* 3533 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 3534 */ 3535 static int 3536 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 3537 int flags) 3538 { 3539 struct nfs4_label l, *ilabel = NULL; 3540 struct nfs_open_context *ctx; 3541 struct nfs4_state *state; 3542 int opened = 0; 3543 int status = 0; 3544 3545 ctx = alloc_nfs_open_context(dentry, FMODE_READ); 3546 if (IS_ERR(ctx)) 3547 return PTR_ERR(ctx); 3548 3549 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 3550 3551 sattr->ia_mode &= ~current_umask(); 3552 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened); 3553 if (IS_ERR(state)) { 3554 status = PTR_ERR(state); 3555 goto out; 3556 } 3557 out: 3558 nfs4_label_release_security(ilabel); 3559 put_nfs_open_context(ctx); 3560 return status; 3561 } 3562 3563 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) 3564 { 3565 struct nfs_server *server = NFS_SERVER(dir); 3566 struct nfs_removeargs args = { 3567 .fh = NFS_FH(dir), 3568 .name = *name, 3569 }; 3570 struct nfs_removeres res = { 3571 .server = server, 3572 }; 3573 struct rpc_message msg = { 3574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 3575 .rpc_argp = &args, 3576 .rpc_resp = &res, 3577 }; 3578 int status; 3579 3580 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 3581 if (status == 0) 3582 update_changeattr(dir, &res.cinfo); 3583 return status; 3584 } 3585 3586 static int nfs4_proc_remove(struct inode *dir, struct qstr *name) 3587 { 3588 struct nfs4_exception exception = { }; 3589 int err; 3590 do { 3591 err = _nfs4_proc_remove(dir, name); 3592 trace_nfs4_remove(dir, name, err); 3593 err = nfs4_handle_exception(NFS_SERVER(dir), err, 3594 &exception); 3595 } while (exception.retry); 3596 return err; 3597 } 3598 3599 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 3600 { 3601 struct nfs_server *server = NFS_SERVER(dir); 3602 struct nfs_removeargs *args = msg->rpc_argp; 3603 struct nfs_removeres *res = msg->rpc_resp; 3604 3605 res->server = server; 3606 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 3607 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1); 3608 3609 nfs_fattr_init(res->dir_attr); 3610 } 3611 3612 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 3613 { 3614 nfs4_setup_sequence(NFS_SERVER(data->dir), 3615 &data->args.seq_args, 3616 &data->res.seq_res, 3617 task); 3618 } 3619 3620 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 3621 { 3622 struct nfs_unlinkdata *data = task->tk_calldata; 3623 struct nfs_removeres *res = &data->res; 3624 3625 if (!nfs4_sequence_done(task, &res->seq_res)) 3626 return 0; 3627 if (nfs4_async_handle_error(task, res->server, NULL, 3628 &data->timeout) == -EAGAIN) 3629 return 0; 3630 update_changeattr(dir, &res->cinfo); 3631 return 1; 3632 } 3633 3634 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir) 3635 { 3636 struct nfs_server *server = NFS_SERVER(dir); 3637 struct nfs_renameargs *arg = msg->rpc_argp; 3638 struct nfs_renameres *res = msg->rpc_resp; 3639 3640 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 3641 res->server = server; 3642 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1); 3643 } 3644 3645 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 3646 { 3647 nfs4_setup_sequence(NFS_SERVER(data->old_dir), 3648 &data->args.seq_args, 3649 &data->res.seq_res, 3650 task); 3651 } 3652 3653 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 3654 struct inode *new_dir) 3655 { 3656 struct nfs_renamedata *data = task->tk_calldata; 3657 struct nfs_renameres *res = &data->res; 3658 3659 if (!nfs4_sequence_done(task, &res->seq_res)) 3660 return 0; 3661 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 3662 return 0; 3663 3664 update_changeattr(old_dir, &res->old_cinfo); 3665 update_changeattr(new_dir, &res->new_cinfo); 3666 return 1; 3667 } 3668 3669 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 3670 { 3671 struct nfs_server *server = NFS_SERVER(inode); 3672 struct nfs4_link_arg arg = { 3673 .fh = NFS_FH(inode), 3674 .dir_fh = NFS_FH(dir), 3675 .name = name, 3676 .bitmask = server->attr_bitmask, 3677 }; 3678 struct nfs4_link_res res = { 3679 .server = server, 3680 .label = NULL, 3681 }; 3682 struct rpc_message msg = { 3683 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 3684 .rpc_argp = &arg, 3685 .rpc_resp = &res, 3686 }; 3687 int status = -ENOMEM; 3688 3689 res.fattr = nfs_alloc_fattr(); 3690 if (res.fattr == NULL) 3691 goto out; 3692 3693 res.label = nfs4_label_alloc(server, GFP_KERNEL); 3694 if (IS_ERR(res.label)) { 3695 status = PTR_ERR(res.label); 3696 goto out; 3697 } 3698 arg.bitmask = nfs4_bitmask(server, res.label); 3699 3700 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 3701 if (!status) { 3702 update_changeattr(dir, &res.cinfo); 3703 status = nfs_post_op_update_inode(inode, res.fattr); 3704 if (!status) 3705 nfs_setsecurity(inode, res.fattr, res.label); 3706 } 3707 3708 3709 nfs4_label_free(res.label); 3710 3711 out: 3712 nfs_free_fattr(res.fattr); 3713 return status; 3714 } 3715 3716 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 3717 { 3718 struct nfs4_exception exception = { }; 3719 int err; 3720 do { 3721 err = nfs4_handle_exception(NFS_SERVER(inode), 3722 _nfs4_proc_link(inode, dir, name), 3723 &exception); 3724 } while (exception.retry); 3725 return err; 3726 } 3727 3728 struct nfs4_createdata { 3729 struct rpc_message msg; 3730 struct nfs4_create_arg arg; 3731 struct nfs4_create_res res; 3732 struct nfs_fh fh; 3733 struct nfs_fattr fattr; 3734 struct nfs4_label *label; 3735 }; 3736 3737 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 3738 struct qstr *name, struct iattr *sattr, u32 ftype) 3739 { 3740 struct nfs4_createdata *data; 3741 3742 data = kzalloc(sizeof(*data), GFP_KERNEL); 3743 if (data != NULL) { 3744 struct nfs_server *server = NFS_SERVER(dir); 3745 3746 data->label = nfs4_label_alloc(server, GFP_KERNEL); 3747 if (IS_ERR(data->label)) 3748 goto out_free; 3749 3750 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 3751 data->msg.rpc_argp = &data->arg; 3752 data->msg.rpc_resp = &data->res; 3753 data->arg.dir_fh = NFS_FH(dir); 3754 data->arg.server = server; 3755 data->arg.name = name; 3756 data->arg.attrs = sattr; 3757 data->arg.ftype = ftype; 3758 data->arg.bitmask = nfs4_bitmask(server, data->label); 3759 data->res.server = server; 3760 data->res.fh = &data->fh; 3761 data->res.fattr = &data->fattr; 3762 data->res.label = data->label; 3763 nfs_fattr_init(data->res.fattr); 3764 } 3765 return data; 3766 out_free: 3767 kfree(data); 3768 return NULL; 3769 } 3770 3771 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 3772 { 3773 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 3774 &data->arg.seq_args, &data->res.seq_res, 1); 3775 if (status == 0) { 3776 update_changeattr(dir, &data->res.dir_cinfo); 3777 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); 3778 } 3779 return status; 3780 } 3781 3782 static void nfs4_free_createdata(struct nfs4_createdata *data) 3783 { 3784 nfs4_label_free(data->label); 3785 kfree(data); 3786 } 3787 3788 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 3789 struct page *page, unsigned int len, struct iattr *sattr, 3790 struct nfs4_label *label) 3791 { 3792 struct nfs4_createdata *data; 3793 int status = -ENAMETOOLONG; 3794 3795 if (len > NFS4_MAXPATHLEN) 3796 goto out; 3797 3798 status = -ENOMEM; 3799 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 3800 if (data == NULL) 3801 goto out; 3802 3803 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 3804 data->arg.u.symlink.pages = &page; 3805 data->arg.u.symlink.len = len; 3806 data->arg.label = label; 3807 3808 status = nfs4_do_create(dir, dentry, data); 3809 3810 nfs4_free_createdata(data); 3811 out: 3812 return status; 3813 } 3814 3815 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 3816 struct page *page, unsigned int len, struct iattr *sattr) 3817 { 3818 struct nfs4_exception exception = { }; 3819 struct nfs4_label l, *label = NULL; 3820 int err; 3821 3822 label = nfs4_label_init_security(dir, dentry, sattr, &l); 3823 3824 do { 3825 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 3826 trace_nfs4_symlink(dir, &dentry->d_name, err); 3827 err = nfs4_handle_exception(NFS_SERVER(dir), err, 3828 &exception); 3829 } while (exception.retry); 3830 3831 nfs4_label_release_security(label); 3832 return err; 3833 } 3834 3835 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 3836 struct iattr *sattr, struct nfs4_label *label) 3837 { 3838 struct nfs4_createdata *data; 3839 int status = -ENOMEM; 3840 3841 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 3842 if (data == NULL) 3843 goto out; 3844 3845 data->arg.label = label; 3846 status = nfs4_do_create(dir, dentry, data); 3847 3848 nfs4_free_createdata(data); 3849 out: 3850 return status; 3851 } 3852 3853 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 3854 struct iattr *sattr) 3855 { 3856 struct nfs4_exception exception = { }; 3857 struct nfs4_label l, *label = NULL; 3858 int err; 3859 3860 label = nfs4_label_init_security(dir, dentry, sattr, &l); 3861 3862 sattr->ia_mode &= ~current_umask(); 3863 do { 3864 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 3865 trace_nfs4_mkdir(dir, &dentry->d_name, err); 3866 err = nfs4_handle_exception(NFS_SERVER(dir), err, 3867 &exception); 3868 } while (exception.retry); 3869 nfs4_label_release_security(label); 3870 3871 return err; 3872 } 3873 3874 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 3875 u64 cookie, struct page **pages, unsigned int count, int plus) 3876 { 3877 struct inode *dir = d_inode(dentry); 3878 struct nfs4_readdir_arg args = { 3879 .fh = NFS_FH(dir), 3880 .pages = pages, 3881 .pgbase = 0, 3882 .count = count, 3883 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask, 3884 .plus = plus, 3885 }; 3886 struct nfs4_readdir_res res; 3887 struct rpc_message msg = { 3888 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 3889 .rpc_argp = &args, 3890 .rpc_resp = &res, 3891 .rpc_cred = cred, 3892 }; 3893 int status; 3894 3895 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__, 3896 dentry, 3897 (unsigned long long)cookie); 3898 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); 3899 res.pgbase = args.pgbase; 3900 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); 3901 if (status >= 0) { 3902 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); 3903 status += args.pgbase; 3904 } 3905 3906 nfs_invalidate_atime(dir); 3907 3908 dprintk("%s: returns %d\n", __func__, status); 3909 return status; 3910 } 3911 3912 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 3913 u64 cookie, struct page **pages, unsigned int count, int plus) 3914 { 3915 struct nfs4_exception exception = { }; 3916 int err; 3917 do { 3918 err = _nfs4_proc_readdir(dentry, cred, cookie, 3919 pages, count, plus); 3920 trace_nfs4_readdir(d_inode(dentry), err); 3921 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err, 3922 &exception); 3923 } while (exception.retry); 3924 return err; 3925 } 3926 3927 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 3928 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 3929 { 3930 struct nfs4_createdata *data; 3931 int mode = sattr->ia_mode; 3932 int status = -ENOMEM; 3933 3934 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 3935 if (data == NULL) 3936 goto out; 3937 3938 if (S_ISFIFO(mode)) 3939 data->arg.ftype = NF4FIFO; 3940 else if (S_ISBLK(mode)) { 3941 data->arg.ftype = NF4BLK; 3942 data->arg.u.device.specdata1 = MAJOR(rdev); 3943 data->arg.u.device.specdata2 = MINOR(rdev); 3944 } 3945 else if (S_ISCHR(mode)) { 3946 data->arg.ftype = NF4CHR; 3947 data->arg.u.device.specdata1 = MAJOR(rdev); 3948 data->arg.u.device.specdata2 = MINOR(rdev); 3949 } else if (!S_ISSOCK(mode)) { 3950 status = -EINVAL; 3951 goto out_free; 3952 } 3953 3954 data->arg.label = label; 3955 status = nfs4_do_create(dir, dentry, data); 3956 out_free: 3957 nfs4_free_createdata(data); 3958 out: 3959 return status; 3960 } 3961 3962 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 3963 struct iattr *sattr, dev_t rdev) 3964 { 3965 struct nfs4_exception exception = { }; 3966 struct nfs4_label l, *label = NULL; 3967 int err; 3968 3969 label = nfs4_label_init_security(dir, dentry, sattr, &l); 3970 3971 sattr->ia_mode &= ~current_umask(); 3972 do { 3973 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 3974 trace_nfs4_mknod(dir, &dentry->d_name, err); 3975 err = nfs4_handle_exception(NFS_SERVER(dir), err, 3976 &exception); 3977 } while (exception.retry); 3978 3979 nfs4_label_release_security(label); 3980 3981 return err; 3982 } 3983 3984 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 3985 struct nfs_fsstat *fsstat) 3986 { 3987 struct nfs4_statfs_arg args = { 3988 .fh = fhandle, 3989 .bitmask = server->attr_bitmask, 3990 }; 3991 struct nfs4_statfs_res res = { 3992 .fsstat = fsstat, 3993 }; 3994 struct rpc_message msg = { 3995 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 3996 .rpc_argp = &args, 3997 .rpc_resp = &res, 3998 }; 3999 4000 nfs_fattr_init(fsstat->fattr); 4001 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4002 } 4003 4004 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 4005 { 4006 struct nfs4_exception exception = { }; 4007 int err; 4008 do { 4009 err = nfs4_handle_exception(server, 4010 _nfs4_proc_statfs(server, fhandle, fsstat), 4011 &exception); 4012 } while (exception.retry); 4013 return err; 4014 } 4015 4016 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 4017 struct nfs_fsinfo *fsinfo) 4018 { 4019 struct nfs4_fsinfo_arg args = { 4020 .fh = fhandle, 4021 .bitmask = server->attr_bitmask, 4022 }; 4023 struct nfs4_fsinfo_res res = { 4024 .fsinfo = fsinfo, 4025 }; 4026 struct rpc_message msg = { 4027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 4028 .rpc_argp = &args, 4029 .rpc_resp = &res, 4030 }; 4031 4032 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4033 } 4034 4035 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 4036 { 4037 struct nfs4_exception exception = { }; 4038 unsigned long now = jiffies; 4039 int err; 4040 4041 do { 4042 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 4043 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 4044 if (err == 0) { 4045 struct nfs_client *clp = server->nfs_client; 4046 4047 spin_lock(&clp->cl_lock); 4048 clp->cl_lease_time = fsinfo->lease_time * HZ; 4049 clp->cl_last_renewal = now; 4050 spin_unlock(&clp->cl_lock); 4051 break; 4052 } 4053 err = nfs4_handle_exception(server, err, &exception); 4054 } while (exception.retry); 4055 return err; 4056 } 4057 4058 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 4059 { 4060 int error; 4061 4062 nfs_fattr_init(fsinfo->fattr); 4063 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 4064 if (error == 0) { 4065 /* block layout checks this! */ 4066 server->pnfs_blksize = fsinfo->blksize; 4067 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype); 4068 } 4069 4070 return error; 4071 } 4072 4073 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 4074 struct nfs_pathconf *pathconf) 4075 { 4076 struct nfs4_pathconf_arg args = { 4077 .fh = fhandle, 4078 .bitmask = server->attr_bitmask, 4079 }; 4080 struct nfs4_pathconf_res res = { 4081 .pathconf = pathconf, 4082 }; 4083 struct rpc_message msg = { 4084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 4085 .rpc_argp = &args, 4086 .rpc_resp = &res, 4087 }; 4088 4089 /* None of the pathconf attributes are mandatory to implement */ 4090 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 4091 memset(pathconf, 0, sizeof(*pathconf)); 4092 return 0; 4093 } 4094 4095 nfs_fattr_init(pathconf->fattr); 4096 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4097 } 4098 4099 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 4100 struct nfs_pathconf *pathconf) 4101 { 4102 struct nfs4_exception exception = { }; 4103 int err; 4104 4105 do { 4106 err = nfs4_handle_exception(server, 4107 _nfs4_proc_pathconf(server, fhandle, pathconf), 4108 &exception); 4109 } while (exception.retry); 4110 return err; 4111 } 4112 4113 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 4114 const struct nfs_open_context *ctx, 4115 const struct nfs_lock_context *l_ctx, 4116 fmode_t fmode) 4117 { 4118 const struct nfs_lockowner *lockowner = NULL; 4119 4120 if (l_ctx != NULL) 4121 lockowner = &l_ctx->lockowner; 4122 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner); 4123 } 4124 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 4125 4126 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 4127 const struct nfs_open_context *ctx, 4128 const struct nfs_lock_context *l_ctx, 4129 fmode_t fmode) 4130 { 4131 nfs4_stateid current_stateid; 4132 4133 /* If the current stateid represents a lost lock, then exit */ 4134 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO) 4135 return true; 4136 return nfs4_stateid_match(stateid, ¤t_stateid); 4137 } 4138 4139 static bool nfs4_error_stateid_expired(int err) 4140 { 4141 switch (err) { 4142 case -NFS4ERR_DELEG_REVOKED: 4143 case -NFS4ERR_ADMIN_REVOKED: 4144 case -NFS4ERR_BAD_STATEID: 4145 case -NFS4ERR_STALE_STATEID: 4146 case -NFS4ERR_OLD_STATEID: 4147 case -NFS4ERR_OPENMODE: 4148 case -NFS4ERR_EXPIRED: 4149 return true; 4150 } 4151 return false; 4152 } 4153 4154 void __nfs4_read_done_cb(struct nfs_pgio_header *hdr) 4155 { 4156 nfs_invalidate_atime(hdr->inode); 4157 } 4158 4159 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 4160 { 4161 struct nfs_server *server = NFS_SERVER(hdr->inode); 4162 4163 trace_nfs4_read(hdr, task->tk_status); 4164 if (nfs4_async_handle_error(task, server, 4165 hdr->args.context->state, 4166 NULL) == -EAGAIN) { 4167 rpc_restart_call_prepare(task); 4168 return -EAGAIN; 4169 } 4170 4171 __nfs4_read_done_cb(hdr); 4172 if (task->tk_status > 0) 4173 renew_lease(server, hdr->timestamp); 4174 return 0; 4175 } 4176 4177 static bool nfs4_read_stateid_changed(struct rpc_task *task, 4178 struct nfs_pgio_args *args) 4179 { 4180 4181 if (!nfs4_error_stateid_expired(task->tk_status) || 4182 nfs4_stateid_is_current(&args->stateid, 4183 args->context, 4184 args->lock_context, 4185 FMODE_READ)) 4186 return false; 4187 rpc_restart_call_prepare(task); 4188 return true; 4189 } 4190 4191 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 4192 { 4193 4194 dprintk("--> %s\n", __func__); 4195 4196 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 4197 return -EAGAIN; 4198 if (nfs4_read_stateid_changed(task, &hdr->args)) 4199 return -EAGAIN; 4200 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 4201 nfs4_read_done_cb(task, hdr); 4202 } 4203 4204 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 4205 struct rpc_message *msg) 4206 { 4207 hdr->timestamp = jiffies; 4208 hdr->pgio_done_cb = nfs4_read_done_cb; 4209 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 4210 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0); 4211 } 4212 4213 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 4214 struct nfs_pgio_header *hdr) 4215 { 4216 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode), 4217 &hdr->args.seq_args, 4218 &hdr->res.seq_res, 4219 task)) 4220 return 0; 4221 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 4222 hdr->args.lock_context, 4223 hdr->rw_ops->rw_mode) == -EIO) 4224 return -EIO; 4225 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 4226 return -EIO; 4227 return 0; 4228 } 4229 4230 static int nfs4_write_done_cb(struct rpc_task *task, 4231 struct nfs_pgio_header *hdr) 4232 { 4233 struct inode *inode = hdr->inode; 4234 4235 trace_nfs4_write(hdr, task->tk_status); 4236 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 4237 hdr->args.context->state, 4238 NULL) == -EAGAIN) { 4239 rpc_restart_call_prepare(task); 4240 return -EAGAIN; 4241 } 4242 if (task->tk_status >= 0) { 4243 renew_lease(NFS_SERVER(inode), hdr->timestamp); 4244 nfs_writeback_update_inode(hdr); 4245 } 4246 return 0; 4247 } 4248 4249 static bool nfs4_write_stateid_changed(struct rpc_task *task, 4250 struct nfs_pgio_args *args) 4251 { 4252 4253 if (!nfs4_error_stateid_expired(task->tk_status) || 4254 nfs4_stateid_is_current(&args->stateid, 4255 args->context, 4256 args->lock_context, 4257 FMODE_WRITE)) 4258 return false; 4259 rpc_restart_call_prepare(task); 4260 return true; 4261 } 4262 4263 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 4264 { 4265 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 4266 return -EAGAIN; 4267 if (nfs4_write_stateid_changed(task, &hdr->args)) 4268 return -EAGAIN; 4269 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 4270 nfs4_write_done_cb(task, hdr); 4271 } 4272 4273 static 4274 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 4275 { 4276 /* Don't request attributes for pNFS or O_DIRECT writes */ 4277 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 4278 return false; 4279 /* Otherwise, request attributes if and only if we don't hold 4280 * a delegation 4281 */ 4282 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 4283 } 4284 4285 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 4286 struct rpc_message *msg) 4287 { 4288 struct nfs_server *server = NFS_SERVER(hdr->inode); 4289 4290 if (!nfs4_write_need_cache_consistency_data(hdr)) { 4291 hdr->args.bitmask = NULL; 4292 hdr->res.fattr = NULL; 4293 } else 4294 hdr->args.bitmask = server->cache_consistency_bitmask; 4295 4296 if (!hdr->pgio_done_cb) 4297 hdr->pgio_done_cb = nfs4_write_done_cb; 4298 hdr->res.server = server; 4299 hdr->timestamp = jiffies; 4300 4301 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 4302 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1); 4303 } 4304 4305 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 4306 { 4307 nfs4_setup_sequence(NFS_SERVER(data->inode), 4308 &data->args.seq_args, 4309 &data->res.seq_res, 4310 task); 4311 } 4312 4313 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 4314 { 4315 struct inode *inode = data->inode; 4316 4317 trace_nfs4_commit(data, task->tk_status); 4318 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 4319 NULL, NULL) == -EAGAIN) { 4320 rpc_restart_call_prepare(task); 4321 return -EAGAIN; 4322 } 4323 return 0; 4324 } 4325 4326 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 4327 { 4328 if (!nfs4_sequence_done(task, &data->res.seq_res)) 4329 return -EAGAIN; 4330 return data->commit_done_cb(task, data); 4331 } 4332 4333 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) 4334 { 4335 struct nfs_server *server = NFS_SERVER(data->inode); 4336 4337 if (data->commit_done_cb == NULL) 4338 data->commit_done_cb = nfs4_commit_done_cb; 4339 data->res.server = server; 4340 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 4341 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 4342 } 4343 4344 struct nfs4_renewdata { 4345 struct nfs_client *client; 4346 unsigned long timestamp; 4347 }; 4348 4349 /* 4350 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 4351 * standalone procedure for queueing an asynchronous RENEW. 4352 */ 4353 static void nfs4_renew_release(void *calldata) 4354 { 4355 struct nfs4_renewdata *data = calldata; 4356 struct nfs_client *clp = data->client; 4357 4358 if (atomic_read(&clp->cl_count) > 1) 4359 nfs4_schedule_state_renewal(clp); 4360 nfs_put_client(clp); 4361 kfree(data); 4362 } 4363 4364 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 4365 { 4366 struct nfs4_renewdata *data = calldata; 4367 struct nfs_client *clp = data->client; 4368 unsigned long timestamp = data->timestamp; 4369 4370 trace_nfs4_renew_async(clp, task->tk_status); 4371 switch (task->tk_status) { 4372 case 0: 4373 break; 4374 case -NFS4ERR_LEASE_MOVED: 4375 nfs4_schedule_lease_moved_recovery(clp); 4376 break; 4377 default: 4378 /* Unless we're shutting down, schedule state recovery! */ 4379 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 4380 return; 4381 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 4382 nfs4_schedule_lease_recovery(clp); 4383 return; 4384 } 4385 nfs4_schedule_path_down_recovery(clp); 4386 } 4387 do_renew_lease(clp, timestamp); 4388 } 4389 4390 static const struct rpc_call_ops nfs4_renew_ops = { 4391 .rpc_call_done = nfs4_renew_done, 4392 .rpc_release = nfs4_renew_release, 4393 }; 4394 4395 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) 4396 { 4397 struct rpc_message msg = { 4398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 4399 .rpc_argp = clp, 4400 .rpc_cred = cred, 4401 }; 4402 struct nfs4_renewdata *data; 4403 4404 if (renew_flags == 0) 4405 return 0; 4406 if (!atomic_inc_not_zero(&clp->cl_count)) 4407 return -EIO; 4408 data = kmalloc(sizeof(*data), GFP_NOFS); 4409 if (data == NULL) 4410 return -ENOMEM; 4411 data->client = clp; 4412 data->timestamp = jiffies; 4413 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 4414 &nfs4_renew_ops, data); 4415 } 4416 4417 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) 4418 { 4419 struct rpc_message msg = { 4420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 4421 .rpc_argp = clp, 4422 .rpc_cred = cred, 4423 }; 4424 unsigned long now = jiffies; 4425 int status; 4426 4427 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 4428 if (status < 0) 4429 return status; 4430 do_renew_lease(clp, now); 4431 return 0; 4432 } 4433 4434 static inline int nfs4_server_supports_acls(struct nfs_server *server) 4435 { 4436 return server->caps & NFS_CAP_ACLS; 4437 } 4438 4439 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 4440 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 4441 * the stack. 4442 */ 4443 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 4444 4445 static int buf_to_pages_noslab(const void *buf, size_t buflen, 4446 struct page **pages, unsigned int *pgbase) 4447 { 4448 struct page *newpage, **spages; 4449 int rc = 0; 4450 size_t len; 4451 spages = pages; 4452 4453 do { 4454 len = min_t(size_t, PAGE_SIZE, buflen); 4455 newpage = alloc_page(GFP_KERNEL); 4456 4457 if (newpage == NULL) 4458 goto unwind; 4459 memcpy(page_address(newpage), buf, len); 4460 buf += len; 4461 buflen -= len; 4462 *pages++ = newpage; 4463 rc++; 4464 } while (buflen != 0); 4465 4466 return rc; 4467 4468 unwind: 4469 for(; rc > 0; rc--) 4470 __free_page(spages[rc-1]); 4471 return -ENOMEM; 4472 } 4473 4474 struct nfs4_cached_acl { 4475 int cached; 4476 size_t len; 4477 char data[0]; 4478 }; 4479 4480 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 4481 { 4482 struct nfs_inode *nfsi = NFS_I(inode); 4483 4484 spin_lock(&inode->i_lock); 4485 kfree(nfsi->nfs4_acl); 4486 nfsi->nfs4_acl = acl; 4487 spin_unlock(&inode->i_lock); 4488 } 4489 4490 static void nfs4_zap_acl_attr(struct inode *inode) 4491 { 4492 nfs4_set_cached_acl(inode, NULL); 4493 } 4494 4495 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 4496 { 4497 struct nfs_inode *nfsi = NFS_I(inode); 4498 struct nfs4_cached_acl *acl; 4499 int ret = -ENOENT; 4500 4501 spin_lock(&inode->i_lock); 4502 acl = nfsi->nfs4_acl; 4503 if (acl == NULL) 4504 goto out; 4505 if (buf == NULL) /* user is just asking for length */ 4506 goto out_len; 4507 if (acl->cached == 0) 4508 goto out; 4509 ret = -ERANGE; /* see getxattr(2) man page */ 4510 if (acl->len > buflen) 4511 goto out; 4512 memcpy(buf, acl->data, acl->len); 4513 out_len: 4514 ret = acl->len; 4515 out: 4516 spin_unlock(&inode->i_lock); 4517 return ret; 4518 } 4519 4520 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 4521 { 4522 struct nfs4_cached_acl *acl; 4523 size_t buflen = sizeof(*acl) + acl_len; 4524 4525 if (buflen <= PAGE_SIZE) { 4526 acl = kmalloc(buflen, GFP_KERNEL); 4527 if (acl == NULL) 4528 goto out; 4529 acl->cached = 1; 4530 _copy_from_pages(acl->data, pages, pgbase, acl_len); 4531 } else { 4532 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 4533 if (acl == NULL) 4534 goto out; 4535 acl->cached = 0; 4536 } 4537 acl->len = acl_len; 4538 out: 4539 nfs4_set_cached_acl(inode, acl); 4540 } 4541 4542 /* 4543 * The getxattr API returns the required buffer length when called with a 4544 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 4545 * the required buf. On a NULL buf, we send a page of data to the server 4546 * guessing that the ACL request can be serviced by a page. If so, we cache 4547 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 4548 * the cache. If not so, we throw away the page, and cache the required 4549 * length. The next getxattr call will then produce another round trip to 4550 * the server, this time with the input buf of the required size. 4551 */ 4552 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 4553 { 4554 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, }; 4555 struct nfs_getaclargs args = { 4556 .fh = NFS_FH(inode), 4557 .acl_pages = pages, 4558 .acl_len = buflen, 4559 }; 4560 struct nfs_getaclres res = { 4561 .acl_len = buflen, 4562 }; 4563 struct rpc_message msg = { 4564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 4565 .rpc_argp = &args, 4566 .rpc_resp = &res, 4567 }; 4568 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 4569 int ret = -ENOMEM, i; 4570 4571 /* As long as we're doing a round trip to the server anyway, 4572 * let's be prepared for a page of acl data. */ 4573 if (npages == 0) 4574 npages = 1; 4575 if (npages > ARRAY_SIZE(pages)) 4576 return -ERANGE; 4577 4578 for (i = 0; i < npages; i++) { 4579 pages[i] = alloc_page(GFP_KERNEL); 4580 if (!pages[i]) 4581 goto out_free; 4582 } 4583 4584 /* for decoding across pages */ 4585 res.acl_scratch = alloc_page(GFP_KERNEL); 4586 if (!res.acl_scratch) 4587 goto out_free; 4588 4589 args.acl_len = npages * PAGE_SIZE; 4590 args.acl_pgbase = 0; 4591 4592 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 4593 __func__, buf, buflen, npages, args.acl_len); 4594 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 4595 &msg, &args.seq_args, &res.seq_res, 0); 4596 if (ret) 4597 goto out_free; 4598 4599 /* Handle the case where the passed-in buffer is too short */ 4600 if (res.acl_flags & NFS4_ACL_TRUNC) { 4601 /* Did the user only issue a request for the acl length? */ 4602 if (buf == NULL) 4603 goto out_ok; 4604 ret = -ERANGE; 4605 goto out_free; 4606 } 4607 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 4608 if (buf) { 4609 if (res.acl_len > buflen) { 4610 ret = -ERANGE; 4611 goto out_free; 4612 } 4613 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 4614 } 4615 out_ok: 4616 ret = res.acl_len; 4617 out_free: 4618 for (i = 0; i < npages; i++) 4619 if (pages[i]) 4620 __free_page(pages[i]); 4621 if (res.acl_scratch) 4622 __free_page(res.acl_scratch); 4623 return ret; 4624 } 4625 4626 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 4627 { 4628 struct nfs4_exception exception = { }; 4629 ssize_t ret; 4630 do { 4631 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 4632 trace_nfs4_get_acl(inode, ret); 4633 if (ret >= 0) 4634 break; 4635 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 4636 } while (exception.retry); 4637 return ret; 4638 } 4639 4640 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 4641 { 4642 struct nfs_server *server = NFS_SERVER(inode); 4643 int ret; 4644 4645 if (!nfs4_server_supports_acls(server)) 4646 return -EOPNOTSUPP; 4647 ret = nfs_revalidate_inode(server, inode); 4648 if (ret < 0) 4649 return ret; 4650 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 4651 nfs_zap_acl_cache(inode); 4652 ret = nfs4_read_cached_acl(inode, buf, buflen); 4653 if (ret != -ENOENT) 4654 /* -ENOENT is returned if there is no ACL or if there is an ACL 4655 * but no cached acl data, just the acl length */ 4656 return ret; 4657 return nfs4_get_acl_uncached(inode, buf, buflen); 4658 } 4659 4660 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 4661 { 4662 struct nfs_server *server = NFS_SERVER(inode); 4663 struct page *pages[NFS4ACL_MAXPAGES]; 4664 struct nfs_setaclargs arg = { 4665 .fh = NFS_FH(inode), 4666 .acl_pages = pages, 4667 .acl_len = buflen, 4668 }; 4669 struct nfs_setaclres res; 4670 struct rpc_message msg = { 4671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 4672 .rpc_argp = &arg, 4673 .rpc_resp = &res, 4674 }; 4675 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 4676 int ret, i; 4677 4678 if (!nfs4_server_supports_acls(server)) 4679 return -EOPNOTSUPP; 4680 if (npages > ARRAY_SIZE(pages)) 4681 return -ERANGE; 4682 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase); 4683 if (i < 0) 4684 return i; 4685 nfs4_inode_return_delegation(inode); 4686 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4687 4688 /* 4689 * Free each page after tx, so the only ref left is 4690 * held by the network stack 4691 */ 4692 for (; i > 0; i--) 4693 put_page(pages[i-1]); 4694 4695 /* 4696 * Acl update can result in inode attribute update. 4697 * so mark the attribute cache invalid. 4698 */ 4699 spin_lock(&inode->i_lock); 4700 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; 4701 spin_unlock(&inode->i_lock); 4702 nfs_access_zap_cache(inode); 4703 nfs_zap_acl_cache(inode); 4704 return ret; 4705 } 4706 4707 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 4708 { 4709 struct nfs4_exception exception = { }; 4710 int err; 4711 do { 4712 err = __nfs4_proc_set_acl(inode, buf, buflen); 4713 trace_nfs4_set_acl(inode, err); 4714 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4715 &exception); 4716 } while (exception.retry); 4717 return err; 4718 } 4719 4720 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 4721 static int _nfs4_get_security_label(struct inode *inode, void *buf, 4722 size_t buflen) 4723 { 4724 struct nfs_server *server = NFS_SERVER(inode); 4725 struct nfs_fattr fattr; 4726 struct nfs4_label label = {0, 0, buflen, buf}; 4727 4728 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 4729 struct nfs4_getattr_arg arg = { 4730 .fh = NFS_FH(inode), 4731 .bitmask = bitmask, 4732 }; 4733 struct nfs4_getattr_res res = { 4734 .fattr = &fattr, 4735 .label = &label, 4736 .server = server, 4737 }; 4738 struct rpc_message msg = { 4739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4740 .rpc_argp = &arg, 4741 .rpc_resp = &res, 4742 }; 4743 int ret; 4744 4745 nfs_fattr_init(&fattr); 4746 4747 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 4748 if (ret) 4749 return ret; 4750 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 4751 return -ENOENT; 4752 if (buflen < label.len) 4753 return -ERANGE; 4754 return 0; 4755 } 4756 4757 static int nfs4_get_security_label(struct inode *inode, void *buf, 4758 size_t buflen) 4759 { 4760 struct nfs4_exception exception = { }; 4761 int err; 4762 4763 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 4764 return -EOPNOTSUPP; 4765 4766 do { 4767 err = _nfs4_get_security_label(inode, buf, buflen); 4768 trace_nfs4_get_security_label(inode, err); 4769 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4770 &exception); 4771 } while (exception.retry); 4772 return err; 4773 } 4774 4775 static int _nfs4_do_set_security_label(struct inode *inode, 4776 struct nfs4_label *ilabel, 4777 struct nfs_fattr *fattr, 4778 struct nfs4_label *olabel) 4779 { 4780 4781 struct iattr sattr = {0}; 4782 struct nfs_server *server = NFS_SERVER(inode); 4783 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 4784 struct nfs_setattrargs arg = { 4785 .fh = NFS_FH(inode), 4786 .iap = &sattr, 4787 .server = server, 4788 .bitmask = bitmask, 4789 .label = ilabel, 4790 }; 4791 struct nfs_setattrres res = { 4792 .fattr = fattr, 4793 .label = olabel, 4794 .server = server, 4795 }; 4796 struct rpc_message msg = { 4797 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 4798 .rpc_argp = &arg, 4799 .rpc_resp = &res, 4800 }; 4801 int status; 4802 4803 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 4804 4805 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4806 if (status) 4807 dprintk("%s failed: %d\n", __func__, status); 4808 4809 return status; 4810 } 4811 4812 static int nfs4_do_set_security_label(struct inode *inode, 4813 struct nfs4_label *ilabel, 4814 struct nfs_fattr *fattr, 4815 struct nfs4_label *olabel) 4816 { 4817 struct nfs4_exception exception = { }; 4818 int err; 4819 4820 do { 4821 err = _nfs4_do_set_security_label(inode, ilabel, 4822 fattr, olabel); 4823 trace_nfs4_set_security_label(inode, err); 4824 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4825 &exception); 4826 } while (exception.retry); 4827 return err; 4828 } 4829 4830 static int 4831 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen) 4832 { 4833 struct nfs4_label ilabel, *olabel = NULL; 4834 struct nfs_fattr fattr; 4835 struct rpc_cred *cred; 4836 struct inode *inode = d_inode(dentry); 4837 int status; 4838 4839 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 4840 return -EOPNOTSUPP; 4841 4842 nfs_fattr_init(&fattr); 4843 4844 ilabel.pi = 0; 4845 ilabel.lfs = 0; 4846 ilabel.label = (char *)buf; 4847 ilabel.len = buflen; 4848 4849 cred = rpc_lookup_cred(); 4850 if (IS_ERR(cred)) 4851 return PTR_ERR(cred); 4852 4853 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 4854 if (IS_ERR(olabel)) { 4855 status = -PTR_ERR(olabel); 4856 goto out; 4857 } 4858 4859 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); 4860 if (status == 0) 4861 nfs_setsecurity(inode, &fattr, olabel); 4862 4863 nfs4_label_free(olabel); 4864 out: 4865 put_rpccred(cred); 4866 return status; 4867 } 4868 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 4869 4870 4871 static int 4872 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, 4873 struct nfs4_state *state, long *timeout) 4874 { 4875 struct nfs_client *clp = server->nfs_client; 4876 4877 if (task->tk_status >= 0) 4878 return 0; 4879 switch(task->tk_status) { 4880 case -NFS4ERR_DELEG_REVOKED: 4881 case -NFS4ERR_ADMIN_REVOKED: 4882 case -NFS4ERR_BAD_STATEID: 4883 case -NFS4ERR_OPENMODE: 4884 if (state == NULL) 4885 break; 4886 if (nfs4_schedule_stateid_recovery(server, state) < 0) 4887 goto recovery_failed; 4888 goto wait_on_recovery; 4889 case -NFS4ERR_EXPIRED: 4890 if (state != NULL) { 4891 if (nfs4_schedule_stateid_recovery(server, state) < 0) 4892 goto recovery_failed; 4893 } 4894 case -NFS4ERR_STALE_STATEID: 4895 case -NFS4ERR_STALE_CLIENTID: 4896 nfs4_schedule_lease_recovery(clp); 4897 goto wait_on_recovery; 4898 case -NFS4ERR_MOVED: 4899 if (nfs4_schedule_migration_recovery(server) < 0) 4900 goto recovery_failed; 4901 goto wait_on_recovery; 4902 case -NFS4ERR_LEASE_MOVED: 4903 nfs4_schedule_lease_moved_recovery(clp); 4904 goto wait_on_recovery; 4905 #if defined(CONFIG_NFS_V4_1) 4906 case -NFS4ERR_BADSESSION: 4907 case -NFS4ERR_BADSLOT: 4908 case -NFS4ERR_BAD_HIGH_SLOT: 4909 case -NFS4ERR_DEADSESSION: 4910 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 4911 case -NFS4ERR_SEQ_FALSE_RETRY: 4912 case -NFS4ERR_SEQ_MISORDERED: 4913 dprintk("%s ERROR %d, Reset session\n", __func__, 4914 task->tk_status); 4915 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); 4916 goto wait_on_recovery; 4917 #endif /* CONFIG_NFS_V4_1 */ 4918 case -NFS4ERR_DELAY: 4919 nfs_inc_server_stats(server, NFSIOS_DELAY); 4920 rpc_delay(task, nfs4_update_delay(timeout)); 4921 goto restart_call; 4922 case -NFS4ERR_GRACE: 4923 rpc_delay(task, NFS4_POLL_RETRY_MAX); 4924 case -NFS4ERR_RETRY_UNCACHED_REP: 4925 case -NFS4ERR_OLD_STATEID: 4926 goto restart_call; 4927 } 4928 task->tk_status = nfs4_map_errors(task->tk_status); 4929 return 0; 4930 recovery_failed: 4931 task->tk_status = -EIO; 4932 return 0; 4933 wait_on_recovery: 4934 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 4935 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 4936 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 4937 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 4938 goto recovery_failed; 4939 restart_call: 4940 task->tk_status = 0; 4941 return -EAGAIN; 4942 } 4943 4944 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 4945 nfs4_verifier *bootverf) 4946 { 4947 __be32 verf[2]; 4948 4949 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 4950 /* An impossible timestamp guarantees this value 4951 * will never match a generated boot time. */ 4952 verf[0] = 0; 4953 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1); 4954 } else { 4955 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 4956 verf[0] = cpu_to_be32(nn->boot_time.tv_sec); 4957 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec); 4958 } 4959 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 4960 } 4961 4962 static int 4963 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 4964 { 4965 int result; 4966 size_t len; 4967 char *str; 4968 bool retried = false; 4969 4970 if (clp->cl_owner_id != NULL) 4971 return 0; 4972 retry: 4973 rcu_read_lock(); 4974 len = 10 + strlen(clp->cl_ipaddr) + 1 + 4975 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 4976 1 + 4977 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) + 4978 1; 4979 rcu_read_unlock(); 4980 4981 if (len > NFS4_OPAQUE_LIMIT + 1) 4982 return -EINVAL; 4983 4984 /* 4985 * Since this string is allocated at mount time, and held until the 4986 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 4987 * about a memory-reclaim deadlock. 4988 */ 4989 str = kmalloc(len, GFP_KERNEL); 4990 if (!str) 4991 return -ENOMEM; 4992 4993 rcu_read_lock(); 4994 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s", 4995 clp->cl_ipaddr, 4996 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR), 4997 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)); 4998 rcu_read_unlock(); 4999 5000 /* Did something change? */ 5001 if (result >= len) { 5002 kfree(str); 5003 if (retried) 5004 return -EINVAL; 5005 retried = true; 5006 goto retry; 5007 } 5008 clp->cl_owner_id = str; 5009 return 0; 5010 } 5011 5012 static int 5013 nfs4_init_uniquifier_client_string(struct nfs_client *clp) 5014 { 5015 int result; 5016 size_t len; 5017 char *str; 5018 5019 len = 10 + 10 + 1 + 10 + 1 + 5020 strlen(nfs4_client_id_uniquifier) + 1 + 5021 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5022 5023 if (len > NFS4_OPAQUE_LIMIT + 1) 5024 return -EINVAL; 5025 5026 /* 5027 * Since this string is allocated at mount time, and held until the 5028 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5029 * about a memory-reclaim deadlock. 5030 */ 5031 str = kmalloc(len, GFP_KERNEL); 5032 if (!str) 5033 return -ENOMEM; 5034 5035 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 5036 clp->rpc_ops->version, clp->cl_minorversion, 5037 nfs4_client_id_uniquifier, 5038 clp->cl_rpcclient->cl_nodename); 5039 if (result >= len) { 5040 kfree(str); 5041 return -EINVAL; 5042 } 5043 clp->cl_owner_id = str; 5044 return 0; 5045 } 5046 5047 static int 5048 nfs4_init_uniform_client_string(struct nfs_client *clp) 5049 { 5050 int result; 5051 size_t len; 5052 char *str; 5053 5054 if (clp->cl_owner_id != NULL) 5055 return 0; 5056 5057 if (nfs4_client_id_uniquifier[0] != '\0') 5058 return nfs4_init_uniquifier_client_string(clp); 5059 5060 len = 10 + 10 + 1 + 10 + 1 + 5061 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5062 5063 if (len > NFS4_OPAQUE_LIMIT + 1) 5064 return -EINVAL; 5065 5066 /* 5067 * Since this string is allocated at mount time, and held until the 5068 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5069 * about a memory-reclaim deadlock. 5070 */ 5071 str = kmalloc(len, GFP_KERNEL); 5072 if (!str) 5073 return -ENOMEM; 5074 5075 result = scnprintf(str, len, "Linux NFSv%u.%u %s", 5076 clp->rpc_ops->version, clp->cl_minorversion, 5077 clp->cl_rpcclient->cl_nodename); 5078 if (result >= len) { 5079 kfree(str); 5080 return -EINVAL; 5081 } 5082 clp->cl_owner_id = str; 5083 return 0; 5084 } 5085 5086 /* 5087 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 5088 * services. Advertise one based on the address family of the 5089 * clientaddr. 5090 */ 5091 static unsigned int 5092 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 5093 { 5094 if (strchr(clp->cl_ipaddr, ':') != NULL) 5095 return scnprintf(buf, len, "tcp6"); 5096 else 5097 return scnprintf(buf, len, "tcp"); 5098 } 5099 5100 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 5101 { 5102 struct nfs4_setclientid *sc = calldata; 5103 5104 if (task->tk_status == 0) 5105 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 5106 } 5107 5108 static const struct rpc_call_ops nfs4_setclientid_ops = { 5109 .rpc_call_done = nfs4_setclientid_done, 5110 }; 5111 5112 /** 5113 * nfs4_proc_setclientid - Negotiate client ID 5114 * @clp: state data structure 5115 * @program: RPC program for NFSv4 callback service 5116 * @port: IP port number for NFS4 callback service 5117 * @cred: RPC credential to use for this call 5118 * @res: where to place the result 5119 * 5120 * Returns zero, a negative errno, or a negative NFS4ERR status code. 5121 */ 5122 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 5123 unsigned short port, struct rpc_cred *cred, 5124 struct nfs4_setclientid_res *res) 5125 { 5126 nfs4_verifier sc_verifier; 5127 struct nfs4_setclientid setclientid = { 5128 .sc_verifier = &sc_verifier, 5129 .sc_prog = program, 5130 .sc_clnt = clp, 5131 }; 5132 struct rpc_message msg = { 5133 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 5134 .rpc_argp = &setclientid, 5135 .rpc_resp = res, 5136 .rpc_cred = cred, 5137 }; 5138 struct rpc_task *task; 5139 struct rpc_task_setup task_setup_data = { 5140 .rpc_client = clp->cl_rpcclient, 5141 .rpc_message = &msg, 5142 .callback_ops = &nfs4_setclientid_ops, 5143 .callback_data = &setclientid, 5144 .flags = RPC_TASK_TIMEOUT, 5145 }; 5146 int status; 5147 5148 /* nfs_client_id4 */ 5149 nfs4_init_boot_verifier(clp, &sc_verifier); 5150 5151 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 5152 status = nfs4_init_uniform_client_string(clp); 5153 else 5154 status = nfs4_init_nonuniform_client_string(clp); 5155 5156 if (status) 5157 goto out; 5158 5159 /* cb_client4 */ 5160 setclientid.sc_netid_len = 5161 nfs4_init_callback_netid(clp, 5162 setclientid.sc_netid, 5163 sizeof(setclientid.sc_netid)); 5164 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 5165 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 5166 clp->cl_ipaddr, port >> 8, port & 255); 5167 5168 dprintk("NFS call setclientid auth=%s, '%s'\n", 5169 clp->cl_rpcclient->cl_auth->au_ops->au_name, 5170 clp->cl_owner_id); 5171 task = rpc_run_task(&task_setup_data); 5172 if (IS_ERR(task)) { 5173 status = PTR_ERR(task); 5174 goto out; 5175 } 5176 status = task->tk_status; 5177 if (setclientid.sc_cred) { 5178 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 5179 put_rpccred(setclientid.sc_cred); 5180 } 5181 rpc_put_task(task); 5182 out: 5183 trace_nfs4_setclientid(clp, status); 5184 dprintk("NFS reply setclientid: %d\n", status); 5185 return status; 5186 } 5187 5188 /** 5189 * nfs4_proc_setclientid_confirm - Confirm client ID 5190 * @clp: state data structure 5191 * @res: result of a previous SETCLIENTID 5192 * @cred: RPC credential to use for this call 5193 * 5194 * Returns zero, a negative errno, or a negative NFS4ERR status code. 5195 */ 5196 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 5197 struct nfs4_setclientid_res *arg, 5198 struct rpc_cred *cred) 5199 { 5200 struct rpc_message msg = { 5201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 5202 .rpc_argp = arg, 5203 .rpc_cred = cred, 5204 }; 5205 int status; 5206 5207 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 5208 clp->cl_rpcclient->cl_auth->au_ops->au_name, 5209 clp->cl_clientid); 5210 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5211 trace_nfs4_setclientid_confirm(clp, status); 5212 dprintk("NFS reply setclientid_confirm: %d\n", status); 5213 return status; 5214 } 5215 5216 struct nfs4_delegreturndata { 5217 struct nfs4_delegreturnargs args; 5218 struct nfs4_delegreturnres res; 5219 struct nfs_fh fh; 5220 nfs4_stateid stateid; 5221 unsigned long timestamp; 5222 struct nfs_fattr fattr; 5223 int rpc_status; 5224 struct inode *inode; 5225 bool roc; 5226 u32 roc_barrier; 5227 }; 5228 5229 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 5230 { 5231 struct nfs4_delegreturndata *data = calldata; 5232 5233 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5234 return; 5235 5236 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 5237 switch (task->tk_status) { 5238 case 0: 5239 renew_lease(data->res.server, data->timestamp); 5240 case -NFS4ERR_ADMIN_REVOKED: 5241 case -NFS4ERR_DELEG_REVOKED: 5242 case -NFS4ERR_BAD_STATEID: 5243 case -NFS4ERR_OLD_STATEID: 5244 case -NFS4ERR_STALE_STATEID: 5245 case -NFS4ERR_EXPIRED: 5246 task->tk_status = 0; 5247 if (data->roc) 5248 pnfs_roc_set_barrier(data->inode, data->roc_barrier); 5249 break; 5250 default: 5251 if (nfs4_async_handle_error(task, data->res.server, 5252 NULL, NULL) == -EAGAIN) { 5253 rpc_restart_call_prepare(task); 5254 return; 5255 } 5256 } 5257 data->rpc_status = task->tk_status; 5258 } 5259 5260 static void nfs4_delegreturn_release(void *calldata) 5261 { 5262 struct nfs4_delegreturndata *data = calldata; 5263 struct inode *inode = data->inode; 5264 5265 if (inode) { 5266 if (data->roc) 5267 pnfs_roc_release(inode); 5268 nfs_iput_and_deactive(inode); 5269 } 5270 kfree(calldata); 5271 } 5272 5273 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 5274 { 5275 struct nfs4_delegreturndata *d_data; 5276 5277 d_data = (struct nfs4_delegreturndata *)data; 5278 5279 if (d_data->roc && 5280 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task)) 5281 return; 5282 5283 nfs4_setup_sequence(d_data->res.server, 5284 &d_data->args.seq_args, 5285 &d_data->res.seq_res, 5286 task); 5287 } 5288 5289 static const struct rpc_call_ops nfs4_delegreturn_ops = { 5290 .rpc_call_prepare = nfs4_delegreturn_prepare, 5291 .rpc_call_done = nfs4_delegreturn_done, 5292 .rpc_release = nfs4_delegreturn_release, 5293 }; 5294 5295 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 5296 { 5297 struct nfs4_delegreturndata *data; 5298 struct nfs_server *server = NFS_SERVER(inode); 5299 struct rpc_task *task; 5300 struct rpc_message msg = { 5301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 5302 .rpc_cred = cred, 5303 }; 5304 struct rpc_task_setup task_setup_data = { 5305 .rpc_client = server->client, 5306 .rpc_message = &msg, 5307 .callback_ops = &nfs4_delegreturn_ops, 5308 .flags = RPC_TASK_ASYNC, 5309 }; 5310 int status = 0; 5311 5312 data = kzalloc(sizeof(*data), GFP_NOFS); 5313 if (data == NULL) 5314 return -ENOMEM; 5315 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 5316 data->args.fhandle = &data->fh; 5317 data->args.stateid = &data->stateid; 5318 data->args.bitmask = server->cache_consistency_bitmask; 5319 nfs_copy_fh(&data->fh, NFS_FH(inode)); 5320 nfs4_stateid_copy(&data->stateid, stateid); 5321 data->res.fattr = &data->fattr; 5322 data->res.server = server; 5323 nfs_fattr_init(data->res.fattr); 5324 data->timestamp = jiffies; 5325 data->rpc_status = 0; 5326 data->inode = nfs_igrab_and_active(inode); 5327 if (data->inode) 5328 data->roc = nfs4_roc(inode); 5329 5330 task_setup_data.callback_data = data; 5331 msg.rpc_argp = &data->args; 5332 msg.rpc_resp = &data->res; 5333 task = rpc_run_task(&task_setup_data); 5334 if (IS_ERR(task)) 5335 return PTR_ERR(task); 5336 if (!issync) 5337 goto out; 5338 status = nfs4_wait_for_completion_rpc_task(task); 5339 if (status != 0) 5340 goto out; 5341 status = data->rpc_status; 5342 if (status == 0) 5343 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 5344 else 5345 nfs_refresh_inode(inode, &data->fattr); 5346 out: 5347 rpc_put_task(task); 5348 return status; 5349 } 5350 5351 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 5352 { 5353 struct nfs_server *server = NFS_SERVER(inode); 5354 struct nfs4_exception exception = { }; 5355 int err; 5356 do { 5357 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 5358 trace_nfs4_delegreturn(inode, err); 5359 switch (err) { 5360 case -NFS4ERR_STALE_STATEID: 5361 case -NFS4ERR_EXPIRED: 5362 case 0: 5363 return 0; 5364 } 5365 err = nfs4_handle_exception(server, err, &exception); 5366 } while (exception.retry); 5367 return err; 5368 } 5369 5370 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 5371 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 5372 5373 /* 5374 * sleep, with exponential backoff, and retry the LOCK operation. 5375 */ 5376 static unsigned long 5377 nfs4_set_lock_task_retry(unsigned long timeout) 5378 { 5379 freezable_schedule_timeout_killable_unsafe(timeout); 5380 timeout <<= 1; 5381 if (timeout > NFS4_LOCK_MAXTIMEOUT) 5382 return NFS4_LOCK_MAXTIMEOUT; 5383 return timeout; 5384 } 5385 5386 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5387 { 5388 struct inode *inode = state->inode; 5389 struct nfs_server *server = NFS_SERVER(inode); 5390 struct nfs_client *clp = server->nfs_client; 5391 struct nfs_lockt_args arg = { 5392 .fh = NFS_FH(inode), 5393 .fl = request, 5394 }; 5395 struct nfs_lockt_res res = { 5396 .denied = request, 5397 }; 5398 struct rpc_message msg = { 5399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 5400 .rpc_argp = &arg, 5401 .rpc_resp = &res, 5402 .rpc_cred = state->owner->so_cred, 5403 }; 5404 struct nfs4_lock_state *lsp; 5405 int status; 5406 5407 arg.lock_owner.clientid = clp->cl_clientid; 5408 status = nfs4_set_lock_state(state, request); 5409 if (status != 0) 5410 goto out; 5411 lsp = request->fl_u.nfs4_fl.owner; 5412 arg.lock_owner.id = lsp->ls_seqid.owner_id; 5413 arg.lock_owner.s_dev = server->s_dev; 5414 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5415 switch (status) { 5416 case 0: 5417 request->fl_type = F_UNLCK; 5418 break; 5419 case -NFS4ERR_DENIED: 5420 status = 0; 5421 } 5422 request->fl_ops->fl_release_private(request); 5423 request->fl_ops = NULL; 5424 out: 5425 return status; 5426 } 5427 5428 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5429 { 5430 struct nfs4_exception exception = { }; 5431 int err; 5432 5433 do { 5434 err = _nfs4_proc_getlk(state, cmd, request); 5435 trace_nfs4_get_lock(request, state, cmd, err); 5436 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 5437 &exception); 5438 } while (exception.retry); 5439 return err; 5440 } 5441 5442 static int do_vfs_lock(struct file *file, struct file_lock *fl) 5443 { 5444 int res = 0; 5445 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { 5446 case FL_POSIX: 5447 res = posix_lock_file_wait(file, fl); 5448 break; 5449 case FL_FLOCK: 5450 res = flock_lock_file_wait(file, fl); 5451 break; 5452 default: 5453 BUG(); 5454 } 5455 return res; 5456 } 5457 5458 struct nfs4_unlockdata { 5459 struct nfs_locku_args arg; 5460 struct nfs_locku_res res; 5461 struct nfs4_lock_state *lsp; 5462 struct nfs_open_context *ctx; 5463 struct file_lock fl; 5464 const struct nfs_server *server; 5465 unsigned long timestamp; 5466 }; 5467 5468 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 5469 struct nfs_open_context *ctx, 5470 struct nfs4_lock_state *lsp, 5471 struct nfs_seqid *seqid) 5472 { 5473 struct nfs4_unlockdata *p; 5474 struct inode *inode = lsp->ls_state->inode; 5475 5476 p = kzalloc(sizeof(*p), GFP_NOFS); 5477 if (p == NULL) 5478 return NULL; 5479 p->arg.fh = NFS_FH(inode); 5480 p->arg.fl = &p->fl; 5481 p->arg.seqid = seqid; 5482 p->res.seqid = seqid; 5483 p->lsp = lsp; 5484 atomic_inc(&lsp->ls_count); 5485 /* Ensure we don't close file until we're done freeing locks! */ 5486 p->ctx = get_nfs_open_context(ctx); 5487 get_file(fl->fl_file); 5488 memcpy(&p->fl, fl, sizeof(p->fl)); 5489 p->server = NFS_SERVER(inode); 5490 return p; 5491 } 5492 5493 static void nfs4_locku_release_calldata(void *data) 5494 { 5495 struct nfs4_unlockdata *calldata = data; 5496 nfs_free_seqid(calldata->arg.seqid); 5497 nfs4_put_lock_state(calldata->lsp); 5498 put_nfs_open_context(calldata->ctx); 5499 fput(calldata->fl.fl_file); 5500 kfree(calldata); 5501 } 5502 5503 static void nfs4_locku_done(struct rpc_task *task, void *data) 5504 { 5505 struct nfs4_unlockdata *calldata = data; 5506 5507 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 5508 return; 5509 switch (task->tk_status) { 5510 case 0: 5511 renew_lease(calldata->server, calldata->timestamp); 5512 do_vfs_lock(calldata->fl.fl_file, &calldata->fl); 5513 if (nfs4_update_lock_stateid(calldata->lsp, 5514 &calldata->res.stateid)) 5515 break; 5516 case -NFS4ERR_BAD_STATEID: 5517 case -NFS4ERR_OLD_STATEID: 5518 case -NFS4ERR_STALE_STATEID: 5519 case -NFS4ERR_EXPIRED: 5520 if (!nfs4_stateid_match(&calldata->arg.stateid, 5521 &calldata->lsp->ls_stateid)) 5522 rpc_restart_call_prepare(task); 5523 break; 5524 default: 5525 if (nfs4_async_handle_error(task, calldata->server, 5526 NULL, NULL) == -EAGAIN) 5527 rpc_restart_call_prepare(task); 5528 } 5529 nfs_release_seqid(calldata->arg.seqid); 5530 } 5531 5532 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 5533 { 5534 struct nfs4_unlockdata *calldata = data; 5535 5536 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 5537 goto out_wait; 5538 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid); 5539 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 5540 /* Note: exit _without_ running nfs4_locku_done */ 5541 goto out_no_action; 5542 } 5543 calldata->timestamp = jiffies; 5544 if (nfs4_setup_sequence(calldata->server, 5545 &calldata->arg.seq_args, 5546 &calldata->res.seq_res, 5547 task) != 0) 5548 nfs_release_seqid(calldata->arg.seqid); 5549 return; 5550 out_no_action: 5551 task->tk_action = NULL; 5552 out_wait: 5553 nfs4_sequence_done(task, &calldata->res.seq_res); 5554 } 5555 5556 static const struct rpc_call_ops nfs4_locku_ops = { 5557 .rpc_call_prepare = nfs4_locku_prepare, 5558 .rpc_call_done = nfs4_locku_done, 5559 .rpc_release = nfs4_locku_release_calldata, 5560 }; 5561 5562 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 5563 struct nfs_open_context *ctx, 5564 struct nfs4_lock_state *lsp, 5565 struct nfs_seqid *seqid) 5566 { 5567 struct nfs4_unlockdata *data; 5568 struct rpc_message msg = { 5569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 5570 .rpc_cred = ctx->cred, 5571 }; 5572 struct rpc_task_setup task_setup_data = { 5573 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 5574 .rpc_message = &msg, 5575 .callback_ops = &nfs4_locku_ops, 5576 .workqueue = nfsiod_workqueue, 5577 .flags = RPC_TASK_ASYNC, 5578 }; 5579 5580 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 5581 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 5582 5583 /* Ensure this is an unlock - when canceling a lock, the 5584 * canceled lock is passed in, and it won't be an unlock. 5585 */ 5586 fl->fl_type = F_UNLCK; 5587 5588 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 5589 if (data == NULL) { 5590 nfs_free_seqid(seqid); 5591 return ERR_PTR(-ENOMEM); 5592 } 5593 5594 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); 5595 msg.rpc_argp = &data->arg; 5596 msg.rpc_resp = &data->res; 5597 task_setup_data.callback_data = data; 5598 return rpc_run_task(&task_setup_data); 5599 } 5600 5601 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 5602 { 5603 struct inode *inode = state->inode; 5604 struct nfs4_state_owner *sp = state->owner; 5605 struct nfs_inode *nfsi = NFS_I(inode); 5606 struct nfs_seqid *seqid; 5607 struct nfs4_lock_state *lsp; 5608 struct rpc_task *task; 5609 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 5610 int status = 0; 5611 unsigned char fl_flags = request->fl_flags; 5612 5613 status = nfs4_set_lock_state(state, request); 5614 /* Unlock _before_ we do the RPC call */ 5615 request->fl_flags |= FL_EXISTS; 5616 /* Exclude nfs_delegation_claim_locks() */ 5617 mutex_lock(&sp->so_delegreturn_mutex); 5618 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 5619 down_read(&nfsi->rwsem); 5620 if (do_vfs_lock(request->fl_file, request) == -ENOENT) { 5621 up_read(&nfsi->rwsem); 5622 mutex_unlock(&sp->so_delegreturn_mutex); 5623 goto out; 5624 } 5625 up_read(&nfsi->rwsem); 5626 mutex_unlock(&sp->so_delegreturn_mutex); 5627 if (status != 0) 5628 goto out; 5629 /* Is this a delegated lock? */ 5630 lsp = request->fl_u.nfs4_fl.owner; 5631 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 5632 goto out; 5633 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 5634 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 5635 status = -ENOMEM; 5636 if (IS_ERR(seqid)) 5637 goto out; 5638 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 5639 status = PTR_ERR(task); 5640 if (IS_ERR(task)) 5641 goto out; 5642 status = nfs4_wait_for_completion_rpc_task(task); 5643 rpc_put_task(task); 5644 out: 5645 request->fl_flags = fl_flags; 5646 trace_nfs4_unlock(request, state, F_SETLK, status); 5647 return status; 5648 } 5649 5650 struct nfs4_lockdata { 5651 struct nfs_lock_args arg; 5652 struct nfs_lock_res res; 5653 struct nfs4_lock_state *lsp; 5654 struct nfs_open_context *ctx; 5655 struct file_lock fl; 5656 unsigned long timestamp; 5657 int rpc_status; 5658 int cancelled; 5659 struct nfs_server *server; 5660 }; 5661 5662 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 5663 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 5664 gfp_t gfp_mask) 5665 { 5666 struct nfs4_lockdata *p; 5667 struct inode *inode = lsp->ls_state->inode; 5668 struct nfs_server *server = NFS_SERVER(inode); 5669 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 5670 5671 p = kzalloc(sizeof(*p), gfp_mask); 5672 if (p == NULL) 5673 return NULL; 5674 5675 p->arg.fh = NFS_FH(inode); 5676 p->arg.fl = &p->fl; 5677 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 5678 if (IS_ERR(p->arg.open_seqid)) 5679 goto out_free; 5680 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 5681 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 5682 if (IS_ERR(p->arg.lock_seqid)) 5683 goto out_free_seqid; 5684 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 5685 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 5686 p->arg.lock_owner.s_dev = server->s_dev; 5687 p->res.lock_seqid = p->arg.lock_seqid; 5688 p->lsp = lsp; 5689 p->server = server; 5690 atomic_inc(&lsp->ls_count); 5691 p->ctx = get_nfs_open_context(ctx); 5692 get_file(fl->fl_file); 5693 memcpy(&p->fl, fl, sizeof(p->fl)); 5694 return p; 5695 out_free_seqid: 5696 nfs_free_seqid(p->arg.open_seqid); 5697 out_free: 5698 kfree(p); 5699 return NULL; 5700 } 5701 5702 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 5703 { 5704 struct nfs4_lockdata *data = calldata; 5705 struct nfs4_state *state = data->lsp->ls_state; 5706 5707 dprintk("%s: begin!\n", __func__); 5708 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 5709 goto out_wait; 5710 /* Do we need to do an open_to_lock_owner? */ 5711 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 5712 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 5713 goto out_release_lock_seqid; 5714 } 5715 nfs4_stateid_copy(&data->arg.open_stateid, 5716 &state->open_stateid); 5717 data->arg.new_lock_owner = 1; 5718 data->res.open_seqid = data->arg.open_seqid; 5719 } else { 5720 data->arg.new_lock_owner = 0; 5721 nfs4_stateid_copy(&data->arg.lock_stateid, 5722 &data->lsp->ls_stateid); 5723 } 5724 if (!nfs4_valid_open_stateid(state)) { 5725 data->rpc_status = -EBADF; 5726 task->tk_action = NULL; 5727 goto out_release_open_seqid; 5728 } 5729 data->timestamp = jiffies; 5730 if (nfs4_setup_sequence(data->server, 5731 &data->arg.seq_args, 5732 &data->res.seq_res, 5733 task) == 0) 5734 return; 5735 out_release_open_seqid: 5736 nfs_release_seqid(data->arg.open_seqid); 5737 out_release_lock_seqid: 5738 nfs_release_seqid(data->arg.lock_seqid); 5739 out_wait: 5740 nfs4_sequence_done(task, &data->res.seq_res); 5741 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 5742 } 5743 5744 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 5745 { 5746 struct nfs4_lockdata *data = calldata; 5747 struct nfs4_lock_state *lsp = data->lsp; 5748 5749 dprintk("%s: begin!\n", __func__); 5750 5751 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5752 return; 5753 5754 data->rpc_status = task->tk_status; 5755 switch (task->tk_status) { 5756 case 0: 5757 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 5758 data->timestamp); 5759 if (data->arg.new_lock) { 5760 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 5761 if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) { 5762 rpc_restart_call_prepare(task); 5763 break; 5764 } 5765 } 5766 if (data->arg.new_lock_owner != 0) { 5767 nfs_confirm_seqid(&lsp->ls_seqid, 0); 5768 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 5769 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 5770 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 5771 rpc_restart_call_prepare(task); 5772 break; 5773 case -NFS4ERR_BAD_STATEID: 5774 case -NFS4ERR_OLD_STATEID: 5775 case -NFS4ERR_STALE_STATEID: 5776 case -NFS4ERR_EXPIRED: 5777 if (data->arg.new_lock_owner != 0) { 5778 if (!nfs4_stateid_match(&data->arg.open_stateid, 5779 &lsp->ls_state->open_stateid)) 5780 rpc_restart_call_prepare(task); 5781 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 5782 &lsp->ls_stateid)) 5783 rpc_restart_call_prepare(task); 5784 } 5785 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 5786 } 5787 5788 static void nfs4_lock_release(void *calldata) 5789 { 5790 struct nfs4_lockdata *data = calldata; 5791 5792 dprintk("%s: begin!\n", __func__); 5793 nfs_free_seqid(data->arg.open_seqid); 5794 if (data->cancelled != 0) { 5795 struct rpc_task *task; 5796 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 5797 data->arg.lock_seqid); 5798 if (!IS_ERR(task)) 5799 rpc_put_task_async(task); 5800 dprintk("%s: cancelling lock!\n", __func__); 5801 } else 5802 nfs_free_seqid(data->arg.lock_seqid); 5803 nfs4_put_lock_state(data->lsp); 5804 put_nfs_open_context(data->ctx); 5805 fput(data->fl.fl_file); 5806 kfree(data); 5807 dprintk("%s: done!\n", __func__); 5808 } 5809 5810 static const struct rpc_call_ops nfs4_lock_ops = { 5811 .rpc_call_prepare = nfs4_lock_prepare, 5812 .rpc_call_done = nfs4_lock_done, 5813 .rpc_release = nfs4_lock_release, 5814 }; 5815 5816 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 5817 { 5818 switch (error) { 5819 case -NFS4ERR_ADMIN_REVOKED: 5820 case -NFS4ERR_BAD_STATEID: 5821 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 5822 if (new_lock_owner != 0 || 5823 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 5824 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 5825 break; 5826 case -NFS4ERR_STALE_STATEID: 5827 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 5828 case -NFS4ERR_EXPIRED: 5829 nfs4_schedule_lease_recovery(server->nfs_client); 5830 }; 5831 } 5832 5833 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 5834 { 5835 struct nfs4_lockdata *data; 5836 struct rpc_task *task; 5837 struct rpc_message msg = { 5838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 5839 .rpc_cred = state->owner->so_cred, 5840 }; 5841 struct rpc_task_setup task_setup_data = { 5842 .rpc_client = NFS_CLIENT(state->inode), 5843 .rpc_message = &msg, 5844 .callback_ops = &nfs4_lock_ops, 5845 .workqueue = nfsiod_workqueue, 5846 .flags = RPC_TASK_ASYNC, 5847 }; 5848 int ret; 5849 5850 dprintk("%s: begin!\n", __func__); 5851 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 5852 fl->fl_u.nfs4_fl.owner, 5853 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 5854 if (data == NULL) 5855 return -ENOMEM; 5856 if (IS_SETLKW(cmd)) 5857 data->arg.block = 1; 5858 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); 5859 msg.rpc_argp = &data->arg; 5860 msg.rpc_resp = &data->res; 5861 task_setup_data.callback_data = data; 5862 if (recovery_type > NFS_LOCK_NEW) { 5863 if (recovery_type == NFS_LOCK_RECLAIM) 5864 data->arg.reclaim = NFS_LOCK_RECLAIM; 5865 nfs4_set_sequence_privileged(&data->arg.seq_args); 5866 } else 5867 data->arg.new_lock = 1; 5868 task = rpc_run_task(&task_setup_data); 5869 if (IS_ERR(task)) 5870 return PTR_ERR(task); 5871 ret = nfs4_wait_for_completion_rpc_task(task); 5872 if (ret == 0) { 5873 ret = data->rpc_status; 5874 if (ret) 5875 nfs4_handle_setlk_error(data->server, data->lsp, 5876 data->arg.new_lock_owner, ret); 5877 } else 5878 data->cancelled = 1; 5879 rpc_put_task(task); 5880 dprintk("%s: done, ret = %d!\n", __func__, ret); 5881 return ret; 5882 } 5883 5884 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 5885 { 5886 struct nfs_server *server = NFS_SERVER(state->inode); 5887 struct nfs4_exception exception = { 5888 .inode = state->inode, 5889 }; 5890 int err; 5891 5892 do { 5893 /* Cache the lock if possible... */ 5894 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 5895 return 0; 5896 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 5897 trace_nfs4_lock_reclaim(request, state, F_SETLK, err); 5898 if (err != -NFS4ERR_DELAY) 5899 break; 5900 nfs4_handle_exception(server, err, &exception); 5901 } while (exception.retry); 5902 return err; 5903 } 5904 5905 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 5906 { 5907 struct nfs_server *server = NFS_SERVER(state->inode); 5908 struct nfs4_exception exception = { 5909 .inode = state->inode, 5910 }; 5911 int err; 5912 5913 err = nfs4_set_lock_state(state, request); 5914 if (err != 0) 5915 return err; 5916 if (!recover_lost_locks) { 5917 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 5918 return 0; 5919 } 5920 do { 5921 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 5922 return 0; 5923 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 5924 trace_nfs4_lock_expired(request, state, F_SETLK, err); 5925 switch (err) { 5926 default: 5927 goto out; 5928 case -NFS4ERR_GRACE: 5929 case -NFS4ERR_DELAY: 5930 nfs4_handle_exception(server, err, &exception); 5931 err = 0; 5932 } 5933 } while (exception.retry); 5934 out: 5935 return err; 5936 } 5937 5938 #if defined(CONFIG_NFS_V4_1) 5939 /** 5940 * nfs41_check_expired_locks - possibly free a lock stateid 5941 * 5942 * @state: NFSv4 state for an inode 5943 * 5944 * Returns NFS_OK if recovery for this stateid is now finished. 5945 * Otherwise a negative NFS4ERR value is returned. 5946 */ 5947 static int nfs41_check_expired_locks(struct nfs4_state *state) 5948 { 5949 int status, ret = -NFS4ERR_BAD_STATEID; 5950 struct nfs4_lock_state *lsp; 5951 struct nfs_server *server = NFS_SERVER(state->inode); 5952 5953 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 5954 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 5955 struct rpc_cred *cred = lsp->ls_state->owner->so_cred; 5956 5957 status = nfs41_test_stateid(server, 5958 &lsp->ls_stateid, 5959 cred); 5960 trace_nfs4_test_lock_stateid(state, lsp, status); 5961 if (status != NFS_OK) { 5962 /* Free the stateid unless the server 5963 * informs us the stateid is unrecognized. */ 5964 if (status != -NFS4ERR_BAD_STATEID) 5965 nfs41_free_stateid(server, 5966 &lsp->ls_stateid, 5967 cred); 5968 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 5969 ret = status; 5970 } 5971 } 5972 }; 5973 5974 return ret; 5975 } 5976 5977 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 5978 { 5979 int status = NFS_OK; 5980 5981 if (test_bit(LK_STATE_IN_USE, &state->flags)) 5982 status = nfs41_check_expired_locks(state); 5983 if (status != NFS_OK) 5984 status = nfs4_lock_expired(state, request); 5985 return status; 5986 } 5987 #endif 5988 5989 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5990 { 5991 struct nfs_inode *nfsi = NFS_I(state->inode); 5992 unsigned char fl_flags = request->fl_flags; 5993 int status = -ENOLCK; 5994 5995 if ((fl_flags & FL_POSIX) && 5996 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 5997 goto out; 5998 /* Is this a delegated open? */ 5999 status = nfs4_set_lock_state(state, request); 6000 if (status != 0) 6001 goto out; 6002 request->fl_flags |= FL_ACCESS; 6003 status = do_vfs_lock(request->fl_file, request); 6004 if (status < 0) 6005 goto out; 6006 down_read(&nfsi->rwsem); 6007 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 6008 /* Yes: cache locks! */ 6009 /* ...but avoid races with delegation recall... */ 6010 request->fl_flags = fl_flags & ~FL_SLEEP; 6011 status = do_vfs_lock(request->fl_file, request); 6012 up_read(&nfsi->rwsem); 6013 goto out; 6014 } 6015 up_read(&nfsi->rwsem); 6016 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 6017 out: 6018 request->fl_flags = fl_flags; 6019 return status; 6020 } 6021 6022 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6023 { 6024 struct nfs4_exception exception = { 6025 .state = state, 6026 .inode = state->inode, 6027 }; 6028 int err; 6029 6030 do { 6031 err = _nfs4_proc_setlk(state, cmd, request); 6032 trace_nfs4_set_lock(request, state, cmd, err); 6033 if (err == -NFS4ERR_DENIED) 6034 err = -EAGAIN; 6035 err = nfs4_handle_exception(NFS_SERVER(state->inode), 6036 err, &exception); 6037 } while (exception.retry); 6038 return err; 6039 } 6040 6041 static int 6042 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 6043 { 6044 struct nfs_open_context *ctx; 6045 struct nfs4_state *state; 6046 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 6047 int status; 6048 6049 /* verify open state */ 6050 ctx = nfs_file_open_context(filp); 6051 state = ctx->state; 6052 6053 if (request->fl_start < 0 || request->fl_end < 0) 6054 return -EINVAL; 6055 6056 if (IS_GETLK(cmd)) { 6057 if (state != NULL) 6058 return nfs4_proc_getlk(state, F_GETLK, request); 6059 return 0; 6060 } 6061 6062 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 6063 return -EINVAL; 6064 6065 if (request->fl_type == F_UNLCK) { 6066 if (state != NULL) 6067 return nfs4_proc_unlck(state, cmd, request); 6068 return 0; 6069 } 6070 6071 if (state == NULL) 6072 return -ENOLCK; 6073 /* 6074 * Don't rely on the VFS having checked the file open mode, 6075 * since it won't do this for flock() locks. 6076 */ 6077 switch (request->fl_type) { 6078 case F_RDLCK: 6079 if (!(filp->f_mode & FMODE_READ)) 6080 return -EBADF; 6081 break; 6082 case F_WRLCK: 6083 if (!(filp->f_mode & FMODE_WRITE)) 6084 return -EBADF; 6085 } 6086 6087 do { 6088 status = nfs4_proc_setlk(state, cmd, request); 6089 if ((status != -EAGAIN) || IS_SETLK(cmd)) 6090 break; 6091 timeout = nfs4_set_lock_task_retry(timeout); 6092 status = -ERESTARTSYS; 6093 if (signalled()) 6094 break; 6095 } while(status < 0); 6096 return status; 6097 } 6098 6099 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 6100 { 6101 struct nfs_server *server = NFS_SERVER(state->inode); 6102 int err; 6103 6104 err = nfs4_set_lock_state(state, fl); 6105 if (err != 0) 6106 return err; 6107 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 6108 return nfs4_handle_delegation_recall_error(server, state, stateid, err); 6109 } 6110 6111 struct nfs_release_lockowner_data { 6112 struct nfs4_lock_state *lsp; 6113 struct nfs_server *server; 6114 struct nfs_release_lockowner_args args; 6115 struct nfs_release_lockowner_res res; 6116 unsigned long timestamp; 6117 }; 6118 6119 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 6120 { 6121 struct nfs_release_lockowner_data *data = calldata; 6122 struct nfs_server *server = data->server; 6123 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl, 6124 &data->args.seq_args, &data->res.seq_res, task); 6125 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 6126 data->timestamp = jiffies; 6127 } 6128 6129 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 6130 { 6131 struct nfs_release_lockowner_data *data = calldata; 6132 struct nfs_server *server = data->server; 6133 6134 nfs40_sequence_done(task, &data->res.seq_res); 6135 6136 switch (task->tk_status) { 6137 case 0: 6138 renew_lease(server, data->timestamp); 6139 break; 6140 case -NFS4ERR_STALE_CLIENTID: 6141 case -NFS4ERR_EXPIRED: 6142 nfs4_schedule_lease_recovery(server->nfs_client); 6143 break; 6144 case -NFS4ERR_LEASE_MOVED: 6145 case -NFS4ERR_DELAY: 6146 if (nfs4_async_handle_error(task, server, 6147 NULL, NULL) == -EAGAIN) 6148 rpc_restart_call_prepare(task); 6149 } 6150 } 6151 6152 static void nfs4_release_lockowner_release(void *calldata) 6153 { 6154 struct nfs_release_lockowner_data *data = calldata; 6155 nfs4_free_lock_state(data->server, data->lsp); 6156 kfree(calldata); 6157 } 6158 6159 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 6160 .rpc_call_prepare = nfs4_release_lockowner_prepare, 6161 .rpc_call_done = nfs4_release_lockowner_done, 6162 .rpc_release = nfs4_release_lockowner_release, 6163 }; 6164 6165 static void 6166 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 6167 { 6168 struct nfs_release_lockowner_data *data; 6169 struct rpc_message msg = { 6170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 6171 }; 6172 6173 if (server->nfs_client->cl_mvops->minor_version != 0) 6174 return; 6175 6176 data = kmalloc(sizeof(*data), GFP_NOFS); 6177 if (!data) 6178 return; 6179 data->lsp = lsp; 6180 data->server = server; 6181 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 6182 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 6183 data->args.lock_owner.s_dev = server->s_dev; 6184 6185 msg.rpc_argp = &data->args; 6186 msg.rpc_resp = &data->res; 6187 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 6188 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 6189 } 6190 6191 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 6192 6193 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key, 6194 const void *buf, size_t buflen, 6195 int flags, int type) 6196 { 6197 if (strcmp(key, "") != 0) 6198 return -EINVAL; 6199 6200 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen); 6201 } 6202 6203 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key, 6204 void *buf, size_t buflen, int type) 6205 { 6206 if (strcmp(key, "") != 0) 6207 return -EINVAL; 6208 6209 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen); 6210 } 6211 6212 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list, 6213 size_t list_len, const char *name, 6214 size_t name_len, int type) 6215 { 6216 size_t len = sizeof(XATTR_NAME_NFSV4_ACL); 6217 6218 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)))) 6219 return 0; 6220 6221 if (list && len <= list_len) 6222 memcpy(list, XATTR_NAME_NFSV4_ACL, len); 6223 return len; 6224 } 6225 6226 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 6227 static inline int nfs4_server_supports_labels(struct nfs_server *server) 6228 { 6229 return server->caps & NFS_CAP_SECURITY_LABEL; 6230 } 6231 6232 static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key, 6233 const void *buf, size_t buflen, 6234 int flags, int type) 6235 { 6236 if (security_ismaclabel(key)) 6237 return nfs4_set_security_label(dentry, buf, buflen); 6238 6239 return -EOPNOTSUPP; 6240 } 6241 6242 static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key, 6243 void *buf, size_t buflen, int type) 6244 { 6245 if (security_ismaclabel(key)) 6246 return nfs4_get_security_label(d_inode(dentry), buf, buflen); 6247 return -EOPNOTSUPP; 6248 } 6249 6250 static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list, 6251 size_t list_len, const char *name, 6252 size_t name_len, int type) 6253 { 6254 size_t len = 0; 6255 6256 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) { 6257 len = security_inode_listsecurity(d_inode(dentry), NULL, 0); 6258 if (list && len <= list_len) 6259 security_inode_listsecurity(d_inode(dentry), list, len); 6260 } 6261 return len; 6262 } 6263 6264 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 6265 .prefix = XATTR_SECURITY_PREFIX, 6266 .list = nfs4_xattr_list_nfs4_label, 6267 .get = nfs4_xattr_get_nfs4_label, 6268 .set = nfs4_xattr_set_nfs4_label, 6269 }; 6270 #endif 6271 6272 6273 /* 6274 * nfs_fhget will use either the mounted_on_fileid or the fileid 6275 */ 6276 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 6277 { 6278 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 6279 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 6280 (fattr->valid & NFS_ATTR_FATTR_FSID) && 6281 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 6282 return; 6283 6284 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 6285 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 6286 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 6287 fattr->nlink = 2; 6288 } 6289 6290 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 6291 const struct qstr *name, 6292 struct nfs4_fs_locations *fs_locations, 6293 struct page *page) 6294 { 6295 struct nfs_server *server = NFS_SERVER(dir); 6296 u32 bitmask[3] = { 6297 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6298 }; 6299 struct nfs4_fs_locations_arg args = { 6300 .dir_fh = NFS_FH(dir), 6301 .name = name, 6302 .page = page, 6303 .bitmask = bitmask, 6304 }; 6305 struct nfs4_fs_locations_res res = { 6306 .fs_locations = fs_locations, 6307 }; 6308 struct rpc_message msg = { 6309 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6310 .rpc_argp = &args, 6311 .rpc_resp = &res, 6312 }; 6313 int status; 6314 6315 dprintk("%s: start\n", __func__); 6316 6317 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 6318 * is not supported */ 6319 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 6320 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID; 6321 else 6322 bitmask[0] |= FATTR4_WORD0_FILEID; 6323 6324 nfs_fattr_init(&fs_locations->fattr); 6325 fs_locations->server = server; 6326 fs_locations->nlocations = 0; 6327 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 6328 dprintk("%s: returned status = %d\n", __func__, status); 6329 return status; 6330 } 6331 6332 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 6333 const struct qstr *name, 6334 struct nfs4_fs_locations *fs_locations, 6335 struct page *page) 6336 { 6337 struct nfs4_exception exception = { }; 6338 int err; 6339 do { 6340 err = _nfs4_proc_fs_locations(client, dir, name, 6341 fs_locations, page); 6342 trace_nfs4_get_fs_locations(dir, name, err); 6343 err = nfs4_handle_exception(NFS_SERVER(dir), err, 6344 &exception); 6345 } while (exception.retry); 6346 return err; 6347 } 6348 6349 /* 6350 * This operation also signals the server that this client is 6351 * performing migration recovery. The server can stop returning 6352 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 6353 * appended to this compound to identify the client ID which is 6354 * performing recovery. 6355 */ 6356 static int _nfs40_proc_get_locations(struct inode *inode, 6357 struct nfs4_fs_locations *locations, 6358 struct page *page, struct rpc_cred *cred) 6359 { 6360 struct nfs_server *server = NFS_SERVER(inode); 6361 struct rpc_clnt *clnt = server->client; 6362 u32 bitmask[2] = { 6363 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6364 }; 6365 struct nfs4_fs_locations_arg args = { 6366 .clientid = server->nfs_client->cl_clientid, 6367 .fh = NFS_FH(inode), 6368 .page = page, 6369 .bitmask = bitmask, 6370 .migration = 1, /* skip LOOKUP */ 6371 .renew = 1, /* append RENEW */ 6372 }; 6373 struct nfs4_fs_locations_res res = { 6374 .fs_locations = locations, 6375 .migration = 1, 6376 .renew = 1, 6377 }; 6378 struct rpc_message msg = { 6379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6380 .rpc_argp = &args, 6381 .rpc_resp = &res, 6382 .rpc_cred = cred, 6383 }; 6384 unsigned long now = jiffies; 6385 int status; 6386 6387 nfs_fattr_init(&locations->fattr); 6388 locations->server = server; 6389 locations->nlocations = 0; 6390 6391 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6392 nfs4_set_sequence_privileged(&args.seq_args); 6393 status = nfs4_call_sync_sequence(clnt, server, &msg, 6394 &args.seq_args, &res.seq_res); 6395 if (status) 6396 return status; 6397 6398 renew_lease(server, now); 6399 return 0; 6400 } 6401 6402 #ifdef CONFIG_NFS_V4_1 6403 6404 /* 6405 * This operation also signals the server that this client is 6406 * performing migration recovery. The server can stop asserting 6407 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 6408 * performing this operation is identified in the SEQUENCE 6409 * operation in this compound. 6410 * 6411 * When the client supports GETATTR(fs_locations_info), it can 6412 * be plumbed in here. 6413 */ 6414 static int _nfs41_proc_get_locations(struct inode *inode, 6415 struct nfs4_fs_locations *locations, 6416 struct page *page, struct rpc_cred *cred) 6417 { 6418 struct nfs_server *server = NFS_SERVER(inode); 6419 struct rpc_clnt *clnt = server->client; 6420 u32 bitmask[2] = { 6421 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6422 }; 6423 struct nfs4_fs_locations_arg args = { 6424 .fh = NFS_FH(inode), 6425 .page = page, 6426 .bitmask = bitmask, 6427 .migration = 1, /* skip LOOKUP */ 6428 }; 6429 struct nfs4_fs_locations_res res = { 6430 .fs_locations = locations, 6431 .migration = 1, 6432 }; 6433 struct rpc_message msg = { 6434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6435 .rpc_argp = &args, 6436 .rpc_resp = &res, 6437 .rpc_cred = cred, 6438 }; 6439 int status; 6440 6441 nfs_fattr_init(&locations->fattr); 6442 locations->server = server; 6443 locations->nlocations = 0; 6444 6445 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6446 nfs4_set_sequence_privileged(&args.seq_args); 6447 status = nfs4_call_sync_sequence(clnt, server, &msg, 6448 &args.seq_args, &res.seq_res); 6449 if (status == NFS4_OK && 6450 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 6451 status = -NFS4ERR_LEASE_MOVED; 6452 return status; 6453 } 6454 6455 #endif /* CONFIG_NFS_V4_1 */ 6456 6457 /** 6458 * nfs4_proc_get_locations - discover locations for a migrated FSID 6459 * @inode: inode on FSID that is migrating 6460 * @locations: result of query 6461 * @page: buffer 6462 * @cred: credential to use for this operation 6463 * 6464 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 6465 * operation failed, or a negative errno if a local error occurred. 6466 * 6467 * On success, "locations" is filled in, but if the server has 6468 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 6469 * asserted. 6470 * 6471 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 6472 * from this client that require migration recovery. 6473 */ 6474 int nfs4_proc_get_locations(struct inode *inode, 6475 struct nfs4_fs_locations *locations, 6476 struct page *page, struct rpc_cred *cred) 6477 { 6478 struct nfs_server *server = NFS_SERVER(inode); 6479 struct nfs_client *clp = server->nfs_client; 6480 const struct nfs4_mig_recovery_ops *ops = 6481 clp->cl_mvops->mig_recovery_ops; 6482 struct nfs4_exception exception = { }; 6483 int status; 6484 6485 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 6486 (unsigned long long)server->fsid.major, 6487 (unsigned long long)server->fsid.minor, 6488 clp->cl_hostname); 6489 nfs_display_fhandle(NFS_FH(inode), __func__); 6490 6491 do { 6492 status = ops->get_locations(inode, locations, page, cred); 6493 if (status != -NFS4ERR_DELAY) 6494 break; 6495 nfs4_handle_exception(server, status, &exception); 6496 } while (exception.retry); 6497 return status; 6498 } 6499 6500 /* 6501 * This operation also signals the server that this client is 6502 * performing "lease moved" recovery. The server can stop 6503 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 6504 * is appended to this compound to identify the client ID which is 6505 * performing recovery. 6506 */ 6507 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6508 { 6509 struct nfs_server *server = NFS_SERVER(inode); 6510 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 6511 struct rpc_clnt *clnt = server->client; 6512 struct nfs4_fsid_present_arg args = { 6513 .fh = NFS_FH(inode), 6514 .clientid = clp->cl_clientid, 6515 .renew = 1, /* append RENEW */ 6516 }; 6517 struct nfs4_fsid_present_res res = { 6518 .renew = 1, 6519 }; 6520 struct rpc_message msg = { 6521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 6522 .rpc_argp = &args, 6523 .rpc_resp = &res, 6524 .rpc_cred = cred, 6525 }; 6526 unsigned long now = jiffies; 6527 int status; 6528 6529 res.fh = nfs_alloc_fhandle(); 6530 if (res.fh == NULL) 6531 return -ENOMEM; 6532 6533 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6534 nfs4_set_sequence_privileged(&args.seq_args); 6535 status = nfs4_call_sync_sequence(clnt, server, &msg, 6536 &args.seq_args, &res.seq_res); 6537 nfs_free_fhandle(res.fh); 6538 if (status) 6539 return status; 6540 6541 do_renew_lease(clp, now); 6542 return 0; 6543 } 6544 6545 #ifdef CONFIG_NFS_V4_1 6546 6547 /* 6548 * This operation also signals the server that this client is 6549 * performing "lease moved" recovery. The server can stop asserting 6550 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 6551 * this operation is identified in the SEQUENCE operation in this 6552 * compound. 6553 */ 6554 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6555 { 6556 struct nfs_server *server = NFS_SERVER(inode); 6557 struct rpc_clnt *clnt = server->client; 6558 struct nfs4_fsid_present_arg args = { 6559 .fh = NFS_FH(inode), 6560 }; 6561 struct nfs4_fsid_present_res res = { 6562 }; 6563 struct rpc_message msg = { 6564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 6565 .rpc_argp = &args, 6566 .rpc_resp = &res, 6567 .rpc_cred = cred, 6568 }; 6569 int status; 6570 6571 res.fh = nfs_alloc_fhandle(); 6572 if (res.fh == NULL) 6573 return -ENOMEM; 6574 6575 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6576 nfs4_set_sequence_privileged(&args.seq_args); 6577 status = nfs4_call_sync_sequence(clnt, server, &msg, 6578 &args.seq_args, &res.seq_res); 6579 nfs_free_fhandle(res.fh); 6580 if (status == NFS4_OK && 6581 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 6582 status = -NFS4ERR_LEASE_MOVED; 6583 return status; 6584 } 6585 6586 #endif /* CONFIG_NFS_V4_1 */ 6587 6588 /** 6589 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 6590 * @inode: inode on FSID to check 6591 * @cred: credential to use for this operation 6592 * 6593 * Server indicates whether the FSID is present, moved, or not 6594 * recognized. This operation is necessary to clear a LEASE_MOVED 6595 * condition for this client ID. 6596 * 6597 * Returns NFS4_OK if the FSID is present on this server, 6598 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 6599 * NFS4ERR code if some error occurred on the server, or a 6600 * negative errno if a local failure occurred. 6601 */ 6602 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6603 { 6604 struct nfs_server *server = NFS_SERVER(inode); 6605 struct nfs_client *clp = server->nfs_client; 6606 const struct nfs4_mig_recovery_ops *ops = 6607 clp->cl_mvops->mig_recovery_ops; 6608 struct nfs4_exception exception = { }; 6609 int status; 6610 6611 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 6612 (unsigned long long)server->fsid.major, 6613 (unsigned long long)server->fsid.minor, 6614 clp->cl_hostname); 6615 nfs_display_fhandle(NFS_FH(inode), __func__); 6616 6617 do { 6618 status = ops->fsid_present(inode, cred); 6619 if (status != -NFS4ERR_DELAY) 6620 break; 6621 nfs4_handle_exception(server, status, &exception); 6622 } while (exception.retry); 6623 return status; 6624 } 6625 6626 /** 6627 * If 'use_integrity' is true and the state managment nfs_client 6628 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 6629 * and the machine credential as per RFC3530bis and RFC5661 Security 6630 * Considerations sections. Otherwise, just use the user cred with the 6631 * filesystem's rpc_client. 6632 */ 6633 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 6634 { 6635 int status; 6636 struct nfs4_secinfo_arg args = { 6637 .dir_fh = NFS_FH(dir), 6638 .name = name, 6639 }; 6640 struct nfs4_secinfo_res res = { 6641 .flavors = flavors, 6642 }; 6643 struct rpc_message msg = { 6644 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 6645 .rpc_argp = &args, 6646 .rpc_resp = &res, 6647 }; 6648 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 6649 struct rpc_cred *cred = NULL; 6650 6651 if (use_integrity) { 6652 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient; 6653 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client); 6654 msg.rpc_cred = cred; 6655 } 6656 6657 dprintk("NFS call secinfo %s\n", name->name); 6658 6659 nfs4_state_protect(NFS_SERVER(dir)->nfs_client, 6660 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 6661 6662 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, 6663 &res.seq_res, 0); 6664 dprintk("NFS reply secinfo: %d\n", status); 6665 6666 if (cred) 6667 put_rpccred(cred); 6668 6669 return status; 6670 } 6671 6672 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 6673 struct nfs4_secinfo_flavors *flavors) 6674 { 6675 struct nfs4_exception exception = { }; 6676 int err; 6677 do { 6678 err = -NFS4ERR_WRONGSEC; 6679 6680 /* try to use integrity protection with machine cred */ 6681 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 6682 err = _nfs4_proc_secinfo(dir, name, flavors, true); 6683 6684 /* 6685 * if unable to use integrity protection, or SECINFO with 6686 * integrity protection returns NFS4ERR_WRONGSEC (which is 6687 * disallowed by spec, but exists in deployed servers) use 6688 * the current filesystem's rpc_client and the user cred. 6689 */ 6690 if (err == -NFS4ERR_WRONGSEC) 6691 err = _nfs4_proc_secinfo(dir, name, flavors, false); 6692 6693 trace_nfs4_secinfo(dir, name, err); 6694 err = nfs4_handle_exception(NFS_SERVER(dir), err, 6695 &exception); 6696 } while (exception.retry); 6697 return err; 6698 } 6699 6700 #ifdef CONFIG_NFS_V4_1 6701 /* 6702 * Check the exchange flags returned by the server for invalid flags, having 6703 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 6704 * DS flags set. 6705 */ 6706 static int nfs4_check_cl_exchange_flags(u32 flags) 6707 { 6708 if (flags & ~EXCHGID4_FLAG_MASK_R) 6709 goto out_inval; 6710 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 6711 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 6712 goto out_inval; 6713 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 6714 goto out_inval; 6715 return NFS_OK; 6716 out_inval: 6717 return -NFS4ERR_INVAL; 6718 } 6719 6720 static bool 6721 nfs41_same_server_scope(struct nfs41_server_scope *a, 6722 struct nfs41_server_scope *b) 6723 { 6724 if (a->server_scope_sz == b->server_scope_sz && 6725 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0) 6726 return true; 6727 6728 return false; 6729 } 6730 6731 /* 6732 * nfs4_proc_bind_conn_to_session() 6733 * 6734 * The 4.1 client currently uses the same TCP connection for the 6735 * fore and backchannel. 6736 */ 6737 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred) 6738 { 6739 int status; 6740 struct nfs41_bind_conn_to_session_args args = { 6741 .client = clp, 6742 .dir = NFS4_CDFC4_FORE_OR_BOTH, 6743 }; 6744 struct nfs41_bind_conn_to_session_res res; 6745 struct rpc_message msg = { 6746 .rpc_proc = 6747 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 6748 .rpc_argp = &args, 6749 .rpc_resp = &res, 6750 .rpc_cred = cred, 6751 }; 6752 6753 dprintk("--> %s\n", __func__); 6754 6755 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 6756 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 6757 args.dir = NFS4_CDFC4_FORE; 6758 6759 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 6760 trace_nfs4_bind_conn_to_session(clp, status); 6761 if (status == 0) { 6762 if (memcmp(res.sessionid.data, 6763 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 6764 dprintk("NFS: %s: Session ID mismatch\n", __func__); 6765 status = -EIO; 6766 goto out; 6767 } 6768 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 6769 dprintk("NFS: %s: Unexpected direction from server\n", 6770 __func__); 6771 status = -EIO; 6772 goto out; 6773 } 6774 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 6775 dprintk("NFS: %s: Server returned RDMA mode = true\n", 6776 __func__); 6777 status = -EIO; 6778 goto out; 6779 } 6780 } 6781 out: 6782 dprintk("<-- %s status= %d\n", __func__, status); 6783 return status; 6784 } 6785 6786 /* 6787 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 6788 * and operations we'd like to see to enable certain features in the allow map 6789 */ 6790 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 6791 .how = SP4_MACH_CRED, 6792 .enforce.u.words = { 6793 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 6794 1 << (OP_EXCHANGE_ID - 32) | 6795 1 << (OP_CREATE_SESSION - 32) | 6796 1 << (OP_DESTROY_SESSION - 32) | 6797 1 << (OP_DESTROY_CLIENTID - 32) 6798 }, 6799 .allow.u.words = { 6800 [0] = 1 << (OP_CLOSE) | 6801 1 << (OP_LOCKU) | 6802 1 << (OP_COMMIT), 6803 [1] = 1 << (OP_SECINFO - 32) | 6804 1 << (OP_SECINFO_NO_NAME - 32) | 6805 1 << (OP_TEST_STATEID - 32) | 6806 1 << (OP_FREE_STATEID - 32) | 6807 1 << (OP_WRITE - 32) 6808 } 6809 }; 6810 6811 /* 6812 * Select the state protection mode for client `clp' given the server results 6813 * from exchange_id in `sp'. 6814 * 6815 * Returns 0 on success, negative errno otherwise. 6816 */ 6817 static int nfs4_sp4_select_mode(struct nfs_client *clp, 6818 struct nfs41_state_protection *sp) 6819 { 6820 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 6821 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 6822 1 << (OP_EXCHANGE_ID - 32) | 6823 1 << (OP_CREATE_SESSION - 32) | 6824 1 << (OP_DESTROY_SESSION - 32) | 6825 1 << (OP_DESTROY_CLIENTID - 32) 6826 }; 6827 unsigned int i; 6828 6829 if (sp->how == SP4_MACH_CRED) { 6830 /* Print state protect result */ 6831 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 6832 for (i = 0; i <= LAST_NFS4_OP; i++) { 6833 if (test_bit(i, sp->enforce.u.longs)) 6834 dfprintk(MOUNT, " enforce op %d\n", i); 6835 if (test_bit(i, sp->allow.u.longs)) 6836 dfprintk(MOUNT, " allow op %d\n", i); 6837 } 6838 6839 /* make sure nothing is on enforce list that isn't supported */ 6840 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 6841 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 6842 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 6843 return -EINVAL; 6844 } 6845 } 6846 6847 /* 6848 * Minimal mode - state operations are allowed to use machine 6849 * credential. Note this already happens by default, so the 6850 * client doesn't have to do anything more than the negotiation. 6851 * 6852 * NOTE: we don't care if EXCHANGE_ID is in the list - 6853 * we're already using the machine cred for exchange_id 6854 * and will never use a different cred. 6855 */ 6856 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 6857 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 6858 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 6859 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 6860 dfprintk(MOUNT, "sp4_mach_cred:\n"); 6861 dfprintk(MOUNT, " minimal mode enabled\n"); 6862 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags); 6863 } else { 6864 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 6865 return -EINVAL; 6866 } 6867 6868 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 6869 test_bit(OP_LOCKU, sp->allow.u.longs)) { 6870 dfprintk(MOUNT, " cleanup mode enabled\n"); 6871 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags); 6872 } 6873 6874 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 6875 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 6876 dfprintk(MOUNT, " secinfo mode enabled\n"); 6877 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags); 6878 } 6879 6880 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 6881 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 6882 dfprintk(MOUNT, " stateid mode enabled\n"); 6883 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags); 6884 } 6885 6886 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 6887 dfprintk(MOUNT, " write mode enabled\n"); 6888 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags); 6889 } 6890 6891 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 6892 dfprintk(MOUNT, " commit mode enabled\n"); 6893 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags); 6894 } 6895 } 6896 6897 return 0; 6898 } 6899 6900 /* 6901 * _nfs4_proc_exchange_id() 6902 * 6903 * Wrapper for EXCHANGE_ID operation. 6904 */ 6905 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred, 6906 u32 sp4_how) 6907 { 6908 nfs4_verifier verifier; 6909 struct nfs41_exchange_id_args args = { 6910 .verifier = &verifier, 6911 .client = clp, 6912 #ifdef CONFIG_NFS_V4_1_MIGRATION 6913 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 6914 EXCHGID4_FLAG_BIND_PRINC_STATEID | 6915 EXCHGID4_FLAG_SUPP_MOVED_MIGR, 6916 #else 6917 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 6918 EXCHGID4_FLAG_BIND_PRINC_STATEID, 6919 #endif 6920 }; 6921 struct nfs41_exchange_id_res res = { 6922 0 6923 }; 6924 int status; 6925 struct rpc_message msg = { 6926 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 6927 .rpc_argp = &args, 6928 .rpc_resp = &res, 6929 .rpc_cred = cred, 6930 }; 6931 6932 nfs4_init_boot_verifier(clp, &verifier); 6933 6934 status = nfs4_init_uniform_client_string(clp); 6935 if (status) 6936 goto out; 6937 6938 dprintk("NFS call exchange_id auth=%s, '%s'\n", 6939 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6940 clp->cl_owner_id); 6941 6942 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 6943 GFP_NOFS); 6944 if (unlikely(res.server_owner == NULL)) { 6945 status = -ENOMEM; 6946 goto out; 6947 } 6948 6949 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 6950 GFP_NOFS); 6951 if (unlikely(res.server_scope == NULL)) { 6952 status = -ENOMEM; 6953 goto out_server_owner; 6954 } 6955 6956 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 6957 if (unlikely(res.impl_id == NULL)) { 6958 status = -ENOMEM; 6959 goto out_server_scope; 6960 } 6961 6962 switch (sp4_how) { 6963 case SP4_NONE: 6964 args.state_protect.how = SP4_NONE; 6965 break; 6966 6967 case SP4_MACH_CRED: 6968 args.state_protect = nfs4_sp4_mach_cred_request; 6969 break; 6970 6971 default: 6972 /* unsupported! */ 6973 WARN_ON_ONCE(1); 6974 status = -EINVAL; 6975 goto out_impl_id; 6976 } 6977 6978 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 6979 trace_nfs4_exchange_id(clp, status); 6980 if (status == 0) 6981 status = nfs4_check_cl_exchange_flags(res.flags); 6982 6983 if (status == 0) 6984 status = nfs4_sp4_select_mode(clp, &res.state_protect); 6985 6986 if (status == 0) { 6987 clp->cl_clientid = res.clientid; 6988 clp->cl_exchange_flags = res.flags; 6989 /* Client ID is not confirmed */ 6990 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) { 6991 clear_bit(NFS4_SESSION_ESTABLISHED, 6992 &clp->cl_session->session_state); 6993 clp->cl_seqid = res.seqid; 6994 } 6995 6996 kfree(clp->cl_serverowner); 6997 clp->cl_serverowner = res.server_owner; 6998 res.server_owner = NULL; 6999 7000 /* use the most recent implementation id */ 7001 kfree(clp->cl_implid); 7002 clp->cl_implid = res.impl_id; 7003 res.impl_id = NULL; 7004 7005 if (clp->cl_serverscope != NULL && 7006 !nfs41_same_server_scope(clp->cl_serverscope, 7007 res.server_scope)) { 7008 dprintk("%s: server_scope mismatch detected\n", 7009 __func__); 7010 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 7011 kfree(clp->cl_serverscope); 7012 clp->cl_serverscope = NULL; 7013 } 7014 7015 if (clp->cl_serverscope == NULL) { 7016 clp->cl_serverscope = res.server_scope; 7017 res.server_scope = NULL; 7018 } 7019 } 7020 7021 out_impl_id: 7022 kfree(res.impl_id); 7023 out_server_scope: 7024 kfree(res.server_scope); 7025 out_server_owner: 7026 kfree(res.server_owner); 7027 out: 7028 if (clp->cl_implid != NULL) 7029 dprintk("NFS reply exchange_id: Server Implementation ID: " 7030 "domain: %s, name: %s, date: %llu,%u\n", 7031 clp->cl_implid->domain, clp->cl_implid->name, 7032 clp->cl_implid->date.seconds, 7033 clp->cl_implid->date.nseconds); 7034 dprintk("NFS reply exchange_id: %d\n", status); 7035 return status; 7036 } 7037 7038 /* 7039 * nfs4_proc_exchange_id() 7040 * 7041 * Returns zero, a negative errno, or a negative NFS4ERR status code. 7042 * 7043 * Since the clientid has expired, all compounds using sessions 7044 * associated with the stale clientid will be returning 7045 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 7046 * be in some phase of session reset. 7047 * 7048 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 7049 */ 7050 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) 7051 { 7052 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 7053 int status; 7054 7055 /* try SP4_MACH_CRED if krb5i/p */ 7056 if (authflavor == RPC_AUTH_GSS_KRB5I || 7057 authflavor == RPC_AUTH_GSS_KRB5P) { 7058 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 7059 if (!status) 7060 return 0; 7061 } 7062 7063 /* try SP4_NONE */ 7064 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 7065 } 7066 7067 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 7068 struct rpc_cred *cred) 7069 { 7070 struct rpc_message msg = { 7071 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 7072 .rpc_argp = clp, 7073 .rpc_cred = cred, 7074 }; 7075 int status; 7076 7077 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 7078 trace_nfs4_destroy_clientid(clp, status); 7079 if (status) 7080 dprintk("NFS: Got error %d from the server %s on " 7081 "DESTROY_CLIENTID.", status, clp->cl_hostname); 7082 return status; 7083 } 7084 7085 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 7086 struct rpc_cred *cred) 7087 { 7088 unsigned int loop; 7089 int ret; 7090 7091 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 7092 ret = _nfs4_proc_destroy_clientid(clp, cred); 7093 switch (ret) { 7094 case -NFS4ERR_DELAY: 7095 case -NFS4ERR_CLIENTID_BUSY: 7096 ssleep(1); 7097 break; 7098 default: 7099 return ret; 7100 } 7101 } 7102 return 0; 7103 } 7104 7105 int nfs4_destroy_clientid(struct nfs_client *clp) 7106 { 7107 struct rpc_cred *cred; 7108 int ret = 0; 7109 7110 if (clp->cl_mvops->minor_version < 1) 7111 goto out; 7112 if (clp->cl_exchange_flags == 0) 7113 goto out; 7114 if (clp->cl_preserve_clid) 7115 goto out; 7116 cred = nfs4_get_clid_cred(clp); 7117 ret = nfs4_proc_destroy_clientid(clp, cred); 7118 if (cred) 7119 put_rpccred(cred); 7120 switch (ret) { 7121 case 0: 7122 case -NFS4ERR_STALE_CLIENTID: 7123 clp->cl_exchange_flags = 0; 7124 } 7125 out: 7126 return ret; 7127 } 7128 7129 struct nfs4_get_lease_time_data { 7130 struct nfs4_get_lease_time_args *args; 7131 struct nfs4_get_lease_time_res *res; 7132 struct nfs_client *clp; 7133 }; 7134 7135 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 7136 void *calldata) 7137 { 7138 struct nfs4_get_lease_time_data *data = 7139 (struct nfs4_get_lease_time_data *)calldata; 7140 7141 dprintk("--> %s\n", __func__); 7142 /* just setup sequence, do not trigger session recovery 7143 since we're invoked within one */ 7144 nfs41_setup_sequence(data->clp->cl_session, 7145 &data->args->la_seq_args, 7146 &data->res->lr_seq_res, 7147 task); 7148 dprintk("<-- %s\n", __func__); 7149 } 7150 7151 /* 7152 * Called from nfs4_state_manager thread for session setup, so don't recover 7153 * from sequence operation or clientid errors. 7154 */ 7155 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 7156 { 7157 struct nfs4_get_lease_time_data *data = 7158 (struct nfs4_get_lease_time_data *)calldata; 7159 7160 dprintk("--> %s\n", __func__); 7161 if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) 7162 return; 7163 switch (task->tk_status) { 7164 case -NFS4ERR_DELAY: 7165 case -NFS4ERR_GRACE: 7166 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 7167 rpc_delay(task, NFS4_POLL_RETRY_MIN); 7168 task->tk_status = 0; 7169 /* fall through */ 7170 case -NFS4ERR_RETRY_UNCACHED_REP: 7171 rpc_restart_call_prepare(task); 7172 return; 7173 } 7174 dprintk("<-- %s\n", __func__); 7175 } 7176 7177 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 7178 .rpc_call_prepare = nfs4_get_lease_time_prepare, 7179 .rpc_call_done = nfs4_get_lease_time_done, 7180 }; 7181 7182 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 7183 { 7184 struct rpc_task *task; 7185 struct nfs4_get_lease_time_args args; 7186 struct nfs4_get_lease_time_res res = { 7187 .lr_fsinfo = fsinfo, 7188 }; 7189 struct nfs4_get_lease_time_data data = { 7190 .args = &args, 7191 .res = &res, 7192 .clp = clp, 7193 }; 7194 struct rpc_message msg = { 7195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 7196 .rpc_argp = &args, 7197 .rpc_resp = &res, 7198 }; 7199 struct rpc_task_setup task_setup = { 7200 .rpc_client = clp->cl_rpcclient, 7201 .rpc_message = &msg, 7202 .callback_ops = &nfs4_get_lease_time_ops, 7203 .callback_data = &data, 7204 .flags = RPC_TASK_TIMEOUT, 7205 }; 7206 int status; 7207 7208 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0); 7209 nfs4_set_sequence_privileged(&args.la_seq_args); 7210 dprintk("--> %s\n", __func__); 7211 task = rpc_run_task(&task_setup); 7212 7213 if (IS_ERR(task)) 7214 status = PTR_ERR(task); 7215 else { 7216 status = task->tk_status; 7217 rpc_put_task(task); 7218 } 7219 dprintk("<-- %s return %d\n", __func__, status); 7220 7221 return status; 7222 } 7223 7224 /* 7225 * Initialize the values to be used by the client in CREATE_SESSION 7226 * If nfs4_init_session set the fore channel request and response sizes, 7227 * use them. 7228 * 7229 * Set the back channel max_resp_sz_cached to zero to force the client to 7230 * always set csa_cachethis to FALSE because the current implementation 7231 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 7232 */ 7233 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) 7234 { 7235 unsigned int max_rqst_sz, max_resp_sz; 7236 7237 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 7238 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 7239 7240 /* Fore channel attributes */ 7241 args->fc_attrs.max_rqst_sz = max_rqst_sz; 7242 args->fc_attrs.max_resp_sz = max_resp_sz; 7243 args->fc_attrs.max_ops = NFS4_MAX_OPS; 7244 args->fc_attrs.max_reqs = max_session_slots; 7245 7246 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 7247 "max_ops=%u max_reqs=%u\n", 7248 __func__, 7249 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 7250 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 7251 7252 /* Back channel attributes */ 7253 args->bc_attrs.max_rqst_sz = PAGE_SIZE; 7254 args->bc_attrs.max_resp_sz = PAGE_SIZE; 7255 args->bc_attrs.max_resp_sz_cached = 0; 7256 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 7257 args->bc_attrs.max_reqs = 1; 7258 7259 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 7260 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 7261 __func__, 7262 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 7263 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 7264 args->bc_attrs.max_reqs); 7265 } 7266 7267 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 7268 struct nfs41_create_session_res *res) 7269 { 7270 struct nfs4_channel_attrs *sent = &args->fc_attrs; 7271 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 7272 7273 if (rcvd->max_resp_sz > sent->max_resp_sz) 7274 return -EINVAL; 7275 /* 7276 * Our requested max_ops is the minimum we need; we're not 7277 * prepared to break up compounds into smaller pieces than that. 7278 * So, no point even trying to continue if the server won't 7279 * cooperate: 7280 */ 7281 if (rcvd->max_ops < sent->max_ops) 7282 return -EINVAL; 7283 if (rcvd->max_reqs == 0) 7284 return -EINVAL; 7285 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 7286 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 7287 return 0; 7288 } 7289 7290 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 7291 struct nfs41_create_session_res *res) 7292 { 7293 struct nfs4_channel_attrs *sent = &args->bc_attrs; 7294 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 7295 7296 if (!(res->flags & SESSION4_BACK_CHAN)) 7297 goto out; 7298 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 7299 return -EINVAL; 7300 if (rcvd->max_resp_sz < sent->max_resp_sz) 7301 return -EINVAL; 7302 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 7303 return -EINVAL; 7304 /* These would render the backchannel useless: */ 7305 if (rcvd->max_ops != sent->max_ops) 7306 return -EINVAL; 7307 if (rcvd->max_reqs != sent->max_reqs) 7308 return -EINVAL; 7309 out: 7310 return 0; 7311 } 7312 7313 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 7314 struct nfs41_create_session_res *res) 7315 { 7316 int ret; 7317 7318 ret = nfs4_verify_fore_channel_attrs(args, res); 7319 if (ret) 7320 return ret; 7321 return nfs4_verify_back_channel_attrs(args, res); 7322 } 7323 7324 static void nfs4_update_session(struct nfs4_session *session, 7325 struct nfs41_create_session_res *res) 7326 { 7327 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 7328 /* Mark client id and session as being confirmed */ 7329 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 7330 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 7331 session->flags = res->flags; 7332 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 7333 if (res->flags & SESSION4_BACK_CHAN) 7334 memcpy(&session->bc_attrs, &res->bc_attrs, 7335 sizeof(session->bc_attrs)); 7336 } 7337 7338 static int _nfs4_proc_create_session(struct nfs_client *clp, 7339 struct rpc_cred *cred) 7340 { 7341 struct nfs4_session *session = clp->cl_session; 7342 struct nfs41_create_session_args args = { 7343 .client = clp, 7344 .clientid = clp->cl_clientid, 7345 .seqid = clp->cl_seqid, 7346 .cb_program = NFS4_CALLBACK, 7347 }; 7348 struct nfs41_create_session_res res; 7349 7350 struct rpc_message msg = { 7351 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 7352 .rpc_argp = &args, 7353 .rpc_resp = &res, 7354 .rpc_cred = cred, 7355 }; 7356 int status; 7357 7358 nfs4_init_channel_attrs(&args); 7359 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 7360 7361 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 7362 trace_nfs4_create_session(clp, status); 7363 7364 if (!status) { 7365 /* Verify the session's negotiated channel_attrs values */ 7366 status = nfs4_verify_channel_attrs(&args, &res); 7367 /* Increment the clientid slot sequence id */ 7368 if (clp->cl_seqid == res.seqid) 7369 clp->cl_seqid++; 7370 if (status) 7371 goto out; 7372 nfs4_update_session(session, &res); 7373 } 7374 out: 7375 return status; 7376 } 7377 7378 /* 7379 * Issues a CREATE_SESSION operation to the server. 7380 * It is the responsibility of the caller to verify the session is 7381 * expired before calling this routine. 7382 */ 7383 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred) 7384 { 7385 int status; 7386 unsigned *ptr; 7387 struct nfs4_session *session = clp->cl_session; 7388 7389 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 7390 7391 status = _nfs4_proc_create_session(clp, cred); 7392 if (status) 7393 goto out; 7394 7395 /* Init or reset the session slot tables */ 7396 status = nfs4_setup_session_slot_tables(session); 7397 dprintk("slot table setup returned %d\n", status); 7398 if (status) 7399 goto out; 7400 7401 ptr = (unsigned *)&session->sess_id.data[0]; 7402 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 7403 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 7404 out: 7405 dprintk("<-- %s\n", __func__); 7406 return status; 7407 } 7408 7409 /* 7410 * Issue the over-the-wire RPC DESTROY_SESSION. 7411 * The caller must serialize access to this routine. 7412 */ 7413 int nfs4_proc_destroy_session(struct nfs4_session *session, 7414 struct rpc_cred *cred) 7415 { 7416 struct rpc_message msg = { 7417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 7418 .rpc_argp = session, 7419 .rpc_cred = cred, 7420 }; 7421 int status = 0; 7422 7423 dprintk("--> nfs4_proc_destroy_session\n"); 7424 7425 /* session is still being setup */ 7426 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 7427 return 0; 7428 7429 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 7430 trace_nfs4_destroy_session(session->clp, status); 7431 7432 if (status) 7433 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 7434 "Session has been destroyed regardless...\n", status); 7435 7436 dprintk("<-- nfs4_proc_destroy_session\n"); 7437 return status; 7438 } 7439 7440 /* 7441 * Renew the cl_session lease. 7442 */ 7443 struct nfs4_sequence_data { 7444 struct nfs_client *clp; 7445 struct nfs4_sequence_args args; 7446 struct nfs4_sequence_res res; 7447 }; 7448 7449 static void nfs41_sequence_release(void *data) 7450 { 7451 struct nfs4_sequence_data *calldata = data; 7452 struct nfs_client *clp = calldata->clp; 7453 7454 if (atomic_read(&clp->cl_count) > 1) 7455 nfs4_schedule_state_renewal(clp); 7456 nfs_put_client(clp); 7457 kfree(calldata); 7458 } 7459 7460 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 7461 { 7462 switch(task->tk_status) { 7463 case -NFS4ERR_DELAY: 7464 rpc_delay(task, NFS4_POLL_RETRY_MAX); 7465 return -EAGAIN; 7466 default: 7467 nfs4_schedule_lease_recovery(clp); 7468 } 7469 return 0; 7470 } 7471 7472 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 7473 { 7474 struct nfs4_sequence_data *calldata = data; 7475 struct nfs_client *clp = calldata->clp; 7476 7477 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 7478 return; 7479 7480 trace_nfs4_sequence(clp, task->tk_status); 7481 if (task->tk_status < 0) { 7482 dprintk("%s ERROR %d\n", __func__, task->tk_status); 7483 if (atomic_read(&clp->cl_count) == 1) 7484 goto out; 7485 7486 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 7487 rpc_restart_call_prepare(task); 7488 return; 7489 } 7490 } 7491 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 7492 out: 7493 dprintk("<-- %s\n", __func__); 7494 } 7495 7496 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 7497 { 7498 struct nfs4_sequence_data *calldata = data; 7499 struct nfs_client *clp = calldata->clp; 7500 struct nfs4_sequence_args *args; 7501 struct nfs4_sequence_res *res; 7502 7503 args = task->tk_msg.rpc_argp; 7504 res = task->tk_msg.rpc_resp; 7505 7506 nfs41_setup_sequence(clp->cl_session, args, res, task); 7507 } 7508 7509 static const struct rpc_call_ops nfs41_sequence_ops = { 7510 .rpc_call_done = nfs41_sequence_call_done, 7511 .rpc_call_prepare = nfs41_sequence_prepare, 7512 .rpc_release = nfs41_sequence_release, 7513 }; 7514 7515 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 7516 struct rpc_cred *cred, 7517 bool is_privileged) 7518 { 7519 struct nfs4_sequence_data *calldata; 7520 struct rpc_message msg = { 7521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 7522 .rpc_cred = cred, 7523 }; 7524 struct rpc_task_setup task_setup_data = { 7525 .rpc_client = clp->cl_rpcclient, 7526 .rpc_message = &msg, 7527 .callback_ops = &nfs41_sequence_ops, 7528 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 7529 }; 7530 7531 if (!atomic_inc_not_zero(&clp->cl_count)) 7532 return ERR_PTR(-EIO); 7533 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 7534 if (calldata == NULL) { 7535 nfs_put_client(clp); 7536 return ERR_PTR(-ENOMEM); 7537 } 7538 nfs4_init_sequence(&calldata->args, &calldata->res, 0); 7539 if (is_privileged) 7540 nfs4_set_sequence_privileged(&calldata->args); 7541 msg.rpc_argp = &calldata->args; 7542 msg.rpc_resp = &calldata->res; 7543 calldata->clp = clp; 7544 task_setup_data.callback_data = calldata; 7545 7546 return rpc_run_task(&task_setup_data); 7547 } 7548 7549 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) 7550 { 7551 struct rpc_task *task; 7552 int ret = 0; 7553 7554 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 7555 return -EAGAIN; 7556 task = _nfs41_proc_sequence(clp, cred, false); 7557 if (IS_ERR(task)) 7558 ret = PTR_ERR(task); 7559 else 7560 rpc_put_task_async(task); 7561 dprintk("<-- %s status=%d\n", __func__, ret); 7562 return ret; 7563 } 7564 7565 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) 7566 { 7567 struct rpc_task *task; 7568 int ret; 7569 7570 task = _nfs41_proc_sequence(clp, cred, true); 7571 if (IS_ERR(task)) { 7572 ret = PTR_ERR(task); 7573 goto out; 7574 } 7575 ret = rpc_wait_for_completion_task(task); 7576 if (!ret) { 7577 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp; 7578 7579 if (task->tk_status == 0) 7580 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); 7581 ret = task->tk_status; 7582 } 7583 rpc_put_task(task); 7584 out: 7585 dprintk("<-- %s status=%d\n", __func__, ret); 7586 return ret; 7587 } 7588 7589 struct nfs4_reclaim_complete_data { 7590 struct nfs_client *clp; 7591 struct nfs41_reclaim_complete_args arg; 7592 struct nfs41_reclaim_complete_res res; 7593 }; 7594 7595 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 7596 { 7597 struct nfs4_reclaim_complete_data *calldata = data; 7598 7599 nfs41_setup_sequence(calldata->clp->cl_session, 7600 &calldata->arg.seq_args, 7601 &calldata->res.seq_res, 7602 task); 7603 } 7604 7605 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 7606 { 7607 switch(task->tk_status) { 7608 case 0: 7609 case -NFS4ERR_COMPLETE_ALREADY: 7610 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 7611 break; 7612 case -NFS4ERR_DELAY: 7613 rpc_delay(task, NFS4_POLL_RETRY_MAX); 7614 /* fall through */ 7615 case -NFS4ERR_RETRY_UNCACHED_REP: 7616 return -EAGAIN; 7617 default: 7618 nfs4_schedule_lease_recovery(clp); 7619 } 7620 return 0; 7621 } 7622 7623 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 7624 { 7625 struct nfs4_reclaim_complete_data *calldata = data; 7626 struct nfs_client *clp = calldata->clp; 7627 struct nfs4_sequence_res *res = &calldata->res.seq_res; 7628 7629 dprintk("--> %s\n", __func__); 7630 if (!nfs41_sequence_done(task, res)) 7631 return; 7632 7633 trace_nfs4_reclaim_complete(clp, task->tk_status); 7634 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 7635 rpc_restart_call_prepare(task); 7636 return; 7637 } 7638 dprintk("<-- %s\n", __func__); 7639 } 7640 7641 static void nfs4_free_reclaim_complete_data(void *data) 7642 { 7643 struct nfs4_reclaim_complete_data *calldata = data; 7644 7645 kfree(calldata); 7646 } 7647 7648 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 7649 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 7650 .rpc_call_done = nfs4_reclaim_complete_done, 7651 .rpc_release = nfs4_free_reclaim_complete_data, 7652 }; 7653 7654 /* 7655 * Issue a global reclaim complete. 7656 */ 7657 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 7658 struct rpc_cred *cred) 7659 { 7660 struct nfs4_reclaim_complete_data *calldata; 7661 struct rpc_task *task; 7662 struct rpc_message msg = { 7663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 7664 .rpc_cred = cred, 7665 }; 7666 struct rpc_task_setup task_setup_data = { 7667 .rpc_client = clp->cl_rpcclient, 7668 .rpc_message = &msg, 7669 .callback_ops = &nfs4_reclaim_complete_call_ops, 7670 .flags = RPC_TASK_ASYNC, 7671 }; 7672 int status = -ENOMEM; 7673 7674 dprintk("--> %s\n", __func__); 7675 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 7676 if (calldata == NULL) 7677 goto out; 7678 calldata->clp = clp; 7679 calldata->arg.one_fs = 0; 7680 7681 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0); 7682 nfs4_set_sequence_privileged(&calldata->arg.seq_args); 7683 msg.rpc_argp = &calldata->arg; 7684 msg.rpc_resp = &calldata->res; 7685 task_setup_data.callback_data = calldata; 7686 task = rpc_run_task(&task_setup_data); 7687 if (IS_ERR(task)) { 7688 status = PTR_ERR(task); 7689 goto out; 7690 } 7691 status = nfs4_wait_for_completion_rpc_task(task); 7692 if (status == 0) 7693 status = task->tk_status; 7694 rpc_put_task(task); 7695 return 0; 7696 out: 7697 dprintk("<-- %s status=%d\n", __func__, status); 7698 return status; 7699 } 7700 7701 static void 7702 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 7703 { 7704 struct nfs4_layoutget *lgp = calldata; 7705 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 7706 struct nfs4_session *session = nfs4_get_session(server); 7707 7708 dprintk("--> %s\n", __func__); 7709 /* Note the is a race here, where a CB_LAYOUTRECALL can come in 7710 * right now covering the LAYOUTGET we are about to send. 7711 * However, that is not so catastrophic, and there seems 7712 * to be no way to prevent it completely. 7713 */ 7714 if (nfs41_setup_sequence(session, &lgp->args.seq_args, 7715 &lgp->res.seq_res, task)) 7716 return; 7717 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid, 7718 NFS_I(lgp->args.inode)->layout, 7719 &lgp->args.range, 7720 lgp->args.ctx->state)) { 7721 rpc_exit(task, NFS4_OK); 7722 } 7723 } 7724 7725 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 7726 { 7727 struct nfs4_layoutget *lgp = calldata; 7728 struct inode *inode = lgp->args.inode; 7729 struct nfs_server *server = NFS_SERVER(inode); 7730 struct pnfs_layout_hdr *lo; 7731 struct nfs4_state *state = NULL; 7732 unsigned long timeo, now, giveup; 7733 7734 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 7735 7736 if (!nfs41_sequence_done(task, &lgp->res.seq_res)) 7737 goto out; 7738 7739 switch (task->tk_status) { 7740 case 0: 7741 goto out; 7742 /* 7743 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 7744 * (or clients) writing to the same RAID stripe 7745 */ 7746 case -NFS4ERR_LAYOUTTRYLATER: 7747 /* 7748 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall 7749 * existing layout before getting a new one). 7750 */ 7751 case -NFS4ERR_RECALLCONFLICT: 7752 timeo = rpc_get_timeout(task->tk_client); 7753 giveup = lgp->args.timestamp + timeo; 7754 now = jiffies; 7755 if (time_after(giveup, now)) { 7756 unsigned long delay; 7757 7758 /* Delay for: 7759 * - Not less then NFS4_POLL_RETRY_MIN. 7760 * - One last time a jiffie before we give up 7761 * - exponential backoff (time_now minus start_attempt) 7762 */ 7763 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN, 7764 min((giveup - now - 1), 7765 now - lgp->args.timestamp)); 7766 7767 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n", 7768 __func__, delay); 7769 rpc_delay(task, delay); 7770 task->tk_status = 0; 7771 rpc_restart_call_prepare(task); 7772 goto out; /* Do not call nfs4_async_handle_error() */ 7773 } 7774 break; 7775 case -NFS4ERR_EXPIRED: 7776 case -NFS4ERR_BAD_STATEID: 7777 spin_lock(&inode->i_lock); 7778 lo = NFS_I(inode)->layout; 7779 if (!lo || list_empty(&lo->plh_segs)) { 7780 spin_unlock(&inode->i_lock); 7781 /* If the open stateid was bad, then recover it. */ 7782 state = lgp->args.ctx->state; 7783 } else { 7784 LIST_HEAD(head); 7785 7786 /* 7787 * Mark the bad layout state as invalid, then retry 7788 * with the current stateid. 7789 */ 7790 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL); 7791 spin_unlock(&inode->i_lock); 7792 pnfs_free_lseg_list(&head); 7793 7794 task->tk_status = 0; 7795 rpc_restart_call_prepare(task); 7796 } 7797 } 7798 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) 7799 rpc_restart_call_prepare(task); 7800 out: 7801 dprintk("<-- %s\n", __func__); 7802 } 7803 7804 static size_t max_response_pages(struct nfs_server *server) 7805 { 7806 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 7807 return nfs_page_array_len(0, max_resp_sz); 7808 } 7809 7810 static void nfs4_free_pages(struct page **pages, size_t size) 7811 { 7812 int i; 7813 7814 if (!pages) 7815 return; 7816 7817 for (i = 0; i < size; i++) { 7818 if (!pages[i]) 7819 break; 7820 __free_page(pages[i]); 7821 } 7822 kfree(pages); 7823 } 7824 7825 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags) 7826 { 7827 struct page **pages; 7828 int i; 7829 7830 pages = kcalloc(size, sizeof(struct page *), gfp_flags); 7831 if (!pages) { 7832 dprintk("%s: can't alloc array of %zu pages\n", __func__, size); 7833 return NULL; 7834 } 7835 7836 for (i = 0; i < size; i++) { 7837 pages[i] = alloc_page(gfp_flags); 7838 if (!pages[i]) { 7839 dprintk("%s: failed to allocate page\n", __func__); 7840 nfs4_free_pages(pages, size); 7841 return NULL; 7842 } 7843 } 7844 7845 return pages; 7846 } 7847 7848 static void nfs4_layoutget_release(void *calldata) 7849 { 7850 struct nfs4_layoutget *lgp = calldata; 7851 struct inode *inode = lgp->args.inode; 7852 struct nfs_server *server = NFS_SERVER(inode); 7853 size_t max_pages = max_response_pages(server); 7854 7855 dprintk("--> %s\n", __func__); 7856 nfs4_free_pages(lgp->args.layout.pages, max_pages); 7857 pnfs_put_layout_hdr(NFS_I(inode)->layout); 7858 put_nfs_open_context(lgp->args.ctx); 7859 kfree(calldata); 7860 dprintk("<-- %s\n", __func__); 7861 } 7862 7863 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 7864 .rpc_call_prepare = nfs4_layoutget_prepare, 7865 .rpc_call_done = nfs4_layoutget_done, 7866 .rpc_release = nfs4_layoutget_release, 7867 }; 7868 7869 struct pnfs_layout_segment * 7870 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags) 7871 { 7872 struct inode *inode = lgp->args.inode; 7873 struct nfs_server *server = NFS_SERVER(inode); 7874 size_t max_pages = max_response_pages(server); 7875 struct rpc_task *task; 7876 struct rpc_message msg = { 7877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 7878 .rpc_argp = &lgp->args, 7879 .rpc_resp = &lgp->res, 7880 .rpc_cred = lgp->cred, 7881 }; 7882 struct rpc_task_setup task_setup_data = { 7883 .rpc_client = server->client, 7884 .rpc_message = &msg, 7885 .callback_ops = &nfs4_layoutget_call_ops, 7886 .callback_data = lgp, 7887 .flags = RPC_TASK_ASYNC, 7888 }; 7889 struct pnfs_layout_segment *lseg = NULL; 7890 int status = 0; 7891 7892 dprintk("--> %s\n", __func__); 7893 7894 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ 7895 pnfs_get_layout_hdr(NFS_I(inode)->layout); 7896 7897 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags); 7898 if (!lgp->args.layout.pages) { 7899 nfs4_layoutget_release(lgp); 7900 return ERR_PTR(-ENOMEM); 7901 } 7902 lgp->args.layout.pglen = max_pages * PAGE_SIZE; 7903 lgp->args.timestamp = jiffies; 7904 7905 lgp->res.layoutp = &lgp->args.layout; 7906 lgp->res.seq_res.sr_slot = NULL; 7907 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0); 7908 7909 task = rpc_run_task(&task_setup_data); 7910 if (IS_ERR(task)) 7911 return ERR_CAST(task); 7912 status = nfs4_wait_for_completion_rpc_task(task); 7913 if (status == 0) 7914 status = task->tk_status; 7915 trace_nfs4_layoutget(lgp->args.ctx, 7916 &lgp->args.range, 7917 &lgp->res.range, 7918 status); 7919 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */ 7920 if (status == 0 && lgp->res.layoutp->len) 7921 lseg = pnfs_layout_process(lgp); 7922 rpc_put_task(task); 7923 dprintk("<-- %s status=%d\n", __func__, status); 7924 if (status) 7925 return ERR_PTR(status); 7926 return lseg; 7927 } 7928 7929 static void 7930 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 7931 { 7932 struct nfs4_layoutreturn *lrp = calldata; 7933 7934 dprintk("--> %s\n", __func__); 7935 nfs41_setup_sequence(lrp->clp->cl_session, 7936 &lrp->args.seq_args, 7937 &lrp->res.seq_res, 7938 task); 7939 } 7940 7941 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 7942 { 7943 struct nfs4_layoutreturn *lrp = calldata; 7944 struct nfs_server *server; 7945 7946 dprintk("--> %s\n", __func__); 7947 7948 if (!nfs41_sequence_done(task, &lrp->res.seq_res)) 7949 return; 7950 7951 server = NFS_SERVER(lrp->args.inode); 7952 switch (task->tk_status) { 7953 default: 7954 task->tk_status = 0; 7955 case 0: 7956 break; 7957 case -NFS4ERR_DELAY: 7958 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 7959 break; 7960 rpc_restart_call_prepare(task); 7961 return; 7962 } 7963 dprintk("<-- %s\n", __func__); 7964 } 7965 7966 static void nfs4_layoutreturn_release(void *calldata) 7967 { 7968 struct nfs4_layoutreturn *lrp = calldata; 7969 struct pnfs_layout_hdr *lo = lrp->args.layout; 7970 7971 dprintk("--> %s\n", __func__); 7972 spin_lock(&lo->plh_inode->i_lock); 7973 if (lrp->res.lrs_present) 7974 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true); 7975 pnfs_clear_layoutreturn_waitbit(lo); 7976 clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags); 7977 rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq); 7978 lo->plh_block_lgets--; 7979 spin_unlock(&lo->plh_inode->i_lock); 7980 pnfs_put_layout_hdr(lrp->args.layout); 7981 nfs_iput_and_deactive(lrp->inode); 7982 kfree(calldata); 7983 dprintk("<-- %s\n", __func__); 7984 } 7985 7986 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 7987 .rpc_call_prepare = nfs4_layoutreturn_prepare, 7988 .rpc_call_done = nfs4_layoutreturn_done, 7989 .rpc_release = nfs4_layoutreturn_release, 7990 }; 7991 7992 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 7993 { 7994 struct rpc_task *task; 7995 struct rpc_message msg = { 7996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 7997 .rpc_argp = &lrp->args, 7998 .rpc_resp = &lrp->res, 7999 .rpc_cred = lrp->cred, 8000 }; 8001 struct rpc_task_setup task_setup_data = { 8002 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 8003 .rpc_message = &msg, 8004 .callback_ops = &nfs4_layoutreturn_call_ops, 8005 .callback_data = lrp, 8006 }; 8007 int status = 0; 8008 8009 dprintk("--> %s\n", __func__); 8010 if (!sync) { 8011 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 8012 if (!lrp->inode) { 8013 nfs4_layoutreturn_release(lrp); 8014 return -EAGAIN; 8015 } 8016 task_setup_data.flags |= RPC_TASK_ASYNC; 8017 } 8018 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1); 8019 task = rpc_run_task(&task_setup_data); 8020 if (IS_ERR(task)) 8021 return PTR_ERR(task); 8022 if (sync) 8023 status = task->tk_status; 8024 trace_nfs4_layoutreturn(lrp->args.inode, status); 8025 dprintk("<-- %s status=%d\n", __func__, status); 8026 rpc_put_task(task); 8027 return status; 8028 } 8029 8030 static int 8031 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 8032 struct pnfs_device *pdev, 8033 struct rpc_cred *cred) 8034 { 8035 struct nfs4_getdeviceinfo_args args = { 8036 .pdev = pdev, 8037 .notify_types = NOTIFY_DEVICEID4_CHANGE | 8038 NOTIFY_DEVICEID4_DELETE, 8039 }; 8040 struct nfs4_getdeviceinfo_res res = { 8041 .pdev = pdev, 8042 }; 8043 struct rpc_message msg = { 8044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 8045 .rpc_argp = &args, 8046 .rpc_resp = &res, 8047 .rpc_cred = cred, 8048 }; 8049 int status; 8050 8051 dprintk("--> %s\n", __func__); 8052 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 8053 if (res.notification & ~args.notify_types) 8054 dprintk("%s: unsupported notification\n", __func__); 8055 if (res.notification != args.notify_types) 8056 pdev->nocache = 1; 8057 8058 dprintk("<-- %s status=%d\n", __func__, status); 8059 8060 return status; 8061 } 8062 8063 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 8064 struct pnfs_device *pdev, 8065 struct rpc_cred *cred) 8066 { 8067 struct nfs4_exception exception = { }; 8068 int err; 8069 8070 do { 8071 err = nfs4_handle_exception(server, 8072 _nfs4_proc_getdeviceinfo(server, pdev, cred), 8073 &exception); 8074 } while (exception.retry); 8075 return err; 8076 } 8077 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 8078 8079 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 8080 { 8081 struct nfs4_layoutcommit_data *data = calldata; 8082 struct nfs_server *server = NFS_SERVER(data->args.inode); 8083 struct nfs4_session *session = nfs4_get_session(server); 8084 8085 nfs41_setup_sequence(session, 8086 &data->args.seq_args, 8087 &data->res.seq_res, 8088 task); 8089 } 8090 8091 static void 8092 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 8093 { 8094 struct nfs4_layoutcommit_data *data = calldata; 8095 struct nfs_server *server = NFS_SERVER(data->args.inode); 8096 8097 if (!nfs41_sequence_done(task, &data->res.seq_res)) 8098 return; 8099 8100 switch (task->tk_status) { /* Just ignore these failures */ 8101 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 8102 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 8103 case -NFS4ERR_BADLAYOUT: /* no layout */ 8104 case -NFS4ERR_GRACE: /* loca_recalim always false */ 8105 task->tk_status = 0; 8106 case 0: 8107 break; 8108 default: 8109 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 8110 rpc_restart_call_prepare(task); 8111 return; 8112 } 8113 } 8114 } 8115 8116 static void nfs4_layoutcommit_release(void *calldata) 8117 { 8118 struct nfs4_layoutcommit_data *data = calldata; 8119 8120 pnfs_cleanup_layoutcommit(data); 8121 nfs_post_op_update_inode_force_wcc(data->args.inode, 8122 data->res.fattr); 8123 put_rpccred(data->cred); 8124 nfs_iput_and_deactive(data->inode); 8125 kfree(data); 8126 } 8127 8128 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 8129 .rpc_call_prepare = nfs4_layoutcommit_prepare, 8130 .rpc_call_done = nfs4_layoutcommit_done, 8131 .rpc_release = nfs4_layoutcommit_release, 8132 }; 8133 8134 int 8135 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 8136 { 8137 struct rpc_message msg = { 8138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 8139 .rpc_argp = &data->args, 8140 .rpc_resp = &data->res, 8141 .rpc_cred = data->cred, 8142 }; 8143 struct rpc_task_setup task_setup_data = { 8144 .task = &data->task, 8145 .rpc_client = NFS_CLIENT(data->args.inode), 8146 .rpc_message = &msg, 8147 .callback_ops = &nfs4_layoutcommit_ops, 8148 .callback_data = data, 8149 }; 8150 struct rpc_task *task; 8151 int status = 0; 8152 8153 dprintk("NFS: initiating layoutcommit call. sync %d " 8154 "lbw: %llu inode %lu\n", sync, 8155 data->args.lastbytewritten, 8156 data->args.inode->i_ino); 8157 8158 if (!sync) { 8159 data->inode = nfs_igrab_and_active(data->args.inode); 8160 if (data->inode == NULL) { 8161 nfs4_layoutcommit_release(data); 8162 return -EAGAIN; 8163 } 8164 task_setup_data.flags = RPC_TASK_ASYNC; 8165 } 8166 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 8167 task = rpc_run_task(&task_setup_data); 8168 if (IS_ERR(task)) 8169 return PTR_ERR(task); 8170 if (sync) 8171 status = task->tk_status; 8172 trace_nfs4_layoutcommit(data->args.inode, status); 8173 dprintk("%s: status %d\n", __func__, status); 8174 rpc_put_task(task); 8175 return status; 8176 } 8177 8178 /** 8179 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 8180 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 8181 */ 8182 static int 8183 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 8184 struct nfs_fsinfo *info, 8185 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8186 { 8187 struct nfs41_secinfo_no_name_args args = { 8188 .style = SECINFO_STYLE_CURRENT_FH, 8189 }; 8190 struct nfs4_secinfo_res res = { 8191 .flavors = flavors, 8192 }; 8193 struct rpc_message msg = { 8194 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 8195 .rpc_argp = &args, 8196 .rpc_resp = &res, 8197 }; 8198 struct rpc_clnt *clnt = server->client; 8199 struct rpc_cred *cred = NULL; 8200 int status; 8201 8202 if (use_integrity) { 8203 clnt = server->nfs_client->cl_rpcclient; 8204 cred = nfs4_get_clid_cred(server->nfs_client); 8205 msg.rpc_cred = cred; 8206 } 8207 8208 dprintk("--> %s\n", __func__); 8209 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 8210 &res.seq_res, 0); 8211 dprintk("<-- %s status=%d\n", __func__, status); 8212 8213 if (cred) 8214 put_rpccred(cred); 8215 8216 return status; 8217 } 8218 8219 static int 8220 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 8221 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 8222 { 8223 struct nfs4_exception exception = { }; 8224 int err; 8225 do { 8226 /* first try using integrity protection */ 8227 err = -NFS4ERR_WRONGSEC; 8228 8229 /* try to use integrity protection with machine cred */ 8230 if (_nfs4_is_integrity_protected(server->nfs_client)) 8231 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 8232 flavors, true); 8233 8234 /* 8235 * if unable to use integrity protection, or SECINFO with 8236 * integrity protection returns NFS4ERR_WRONGSEC (which is 8237 * disallowed by spec, but exists in deployed servers) use 8238 * the current filesystem's rpc_client and the user cred. 8239 */ 8240 if (err == -NFS4ERR_WRONGSEC) 8241 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 8242 flavors, false); 8243 8244 switch (err) { 8245 case 0: 8246 case -NFS4ERR_WRONGSEC: 8247 case -ENOTSUPP: 8248 goto out; 8249 default: 8250 err = nfs4_handle_exception(server, err, &exception); 8251 } 8252 } while (exception.retry); 8253 out: 8254 return err; 8255 } 8256 8257 static int 8258 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 8259 struct nfs_fsinfo *info) 8260 { 8261 int err; 8262 struct page *page; 8263 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 8264 struct nfs4_secinfo_flavors *flavors; 8265 struct nfs4_secinfo4 *secinfo; 8266 int i; 8267 8268 page = alloc_page(GFP_KERNEL); 8269 if (!page) { 8270 err = -ENOMEM; 8271 goto out; 8272 } 8273 8274 flavors = page_address(page); 8275 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 8276 8277 /* 8278 * Fall back on "guess and check" method if 8279 * the server doesn't support SECINFO_NO_NAME 8280 */ 8281 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 8282 err = nfs4_find_root_sec(server, fhandle, info); 8283 goto out_freepage; 8284 } 8285 if (err) 8286 goto out_freepage; 8287 8288 for (i = 0; i < flavors->num_flavors; i++) { 8289 secinfo = &flavors->flavors[i]; 8290 8291 switch (secinfo->flavor) { 8292 case RPC_AUTH_NULL: 8293 case RPC_AUTH_UNIX: 8294 case RPC_AUTH_GSS: 8295 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 8296 &secinfo->flavor_info); 8297 break; 8298 default: 8299 flavor = RPC_AUTH_MAXFLAVOR; 8300 break; 8301 } 8302 8303 if (!nfs_auth_info_match(&server->auth_info, flavor)) 8304 flavor = RPC_AUTH_MAXFLAVOR; 8305 8306 if (flavor != RPC_AUTH_MAXFLAVOR) { 8307 err = nfs4_lookup_root_sec(server, fhandle, 8308 info, flavor); 8309 if (!err) 8310 break; 8311 } 8312 } 8313 8314 if (flavor == RPC_AUTH_MAXFLAVOR) 8315 err = -EPERM; 8316 8317 out_freepage: 8318 put_page(page); 8319 if (err == -EACCES) 8320 return -EPERM; 8321 out: 8322 return err; 8323 } 8324 8325 static int _nfs41_test_stateid(struct nfs_server *server, 8326 nfs4_stateid *stateid, 8327 struct rpc_cred *cred) 8328 { 8329 int status; 8330 struct nfs41_test_stateid_args args = { 8331 .stateid = stateid, 8332 }; 8333 struct nfs41_test_stateid_res res; 8334 struct rpc_message msg = { 8335 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 8336 .rpc_argp = &args, 8337 .rpc_resp = &res, 8338 .rpc_cred = cred, 8339 }; 8340 struct rpc_clnt *rpc_client = server->client; 8341 8342 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 8343 &rpc_client, &msg); 8344 8345 dprintk("NFS call test_stateid %p\n", stateid); 8346 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 8347 nfs4_set_sequence_privileged(&args.seq_args); 8348 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 8349 &args.seq_args, &res.seq_res); 8350 if (status != NFS_OK) { 8351 dprintk("NFS reply test_stateid: failed, %d\n", status); 8352 return status; 8353 } 8354 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 8355 return -res.status; 8356 } 8357 8358 /** 8359 * nfs41_test_stateid - perform a TEST_STATEID operation 8360 * 8361 * @server: server / transport on which to perform the operation 8362 * @stateid: state ID to test 8363 * @cred: credential 8364 * 8365 * Returns NFS_OK if the server recognizes that "stateid" is valid. 8366 * Otherwise a negative NFS4ERR value is returned if the operation 8367 * failed or the state ID is not currently valid. 8368 */ 8369 static int nfs41_test_stateid(struct nfs_server *server, 8370 nfs4_stateid *stateid, 8371 struct rpc_cred *cred) 8372 { 8373 struct nfs4_exception exception = { }; 8374 int err; 8375 do { 8376 err = _nfs41_test_stateid(server, stateid, cred); 8377 if (err != -NFS4ERR_DELAY) 8378 break; 8379 nfs4_handle_exception(server, err, &exception); 8380 } while (exception.retry); 8381 return err; 8382 } 8383 8384 struct nfs_free_stateid_data { 8385 struct nfs_server *server; 8386 struct nfs41_free_stateid_args args; 8387 struct nfs41_free_stateid_res res; 8388 }; 8389 8390 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 8391 { 8392 struct nfs_free_stateid_data *data = calldata; 8393 nfs41_setup_sequence(nfs4_get_session(data->server), 8394 &data->args.seq_args, 8395 &data->res.seq_res, 8396 task); 8397 } 8398 8399 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 8400 { 8401 struct nfs_free_stateid_data *data = calldata; 8402 8403 nfs41_sequence_done(task, &data->res.seq_res); 8404 8405 switch (task->tk_status) { 8406 case -NFS4ERR_DELAY: 8407 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 8408 rpc_restart_call_prepare(task); 8409 } 8410 } 8411 8412 static void nfs41_free_stateid_release(void *calldata) 8413 { 8414 kfree(calldata); 8415 } 8416 8417 static const struct rpc_call_ops nfs41_free_stateid_ops = { 8418 .rpc_call_prepare = nfs41_free_stateid_prepare, 8419 .rpc_call_done = nfs41_free_stateid_done, 8420 .rpc_release = nfs41_free_stateid_release, 8421 }; 8422 8423 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server, 8424 nfs4_stateid *stateid, 8425 struct rpc_cred *cred, 8426 bool privileged) 8427 { 8428 struct rpc_message msg = { 8429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 8430 .rpc_cred = cred, 8431 }; 8432 struct rpc_task_setup task_setup = { 8433 .rpc_client = server->client, 8434 .rpc_message = &msg, 8435 .callback_ops = &nfs41_free_stateid_ops, 8436 .flags = RPC_TASK_ASYNC, 8437 }; 8438 struct nfs_free_stateid_data *data; 8439 8440 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 8441 &task_setup.rpc_client, &msg); 8442 8443 dprintk("NFS call free_stateid %p\n", stateid); 8444 data = kmalloc(sizeof(*data), GFP_NOFS); 8445 if (!data) 8446 return ERR_PTR(-ENOMEM); 8447 data->server = server; 8448 nfs4_stateid_copy(&data->args.stateid, stateid); 8449 8450 task_setup.callback_data = data; 8451 8452 msg.rpc_argp = &data->args; 8453 msg.rpc_resp = &data->res; 8454 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 8455 if (privileged) 8456 nfs4_set_sequence_privileged(&data->args.seq_args); 8457 8458 return rpc_run_task(&task_setup); 8459 } 8460 8461 /** 8462 * nfs41_free_stateid - perform a FREE_STATEID operation 8463 * 8464 * @server: server / transport on which to perform the operation 8465 * @stateid: state ID to release 8466 * @cred: credential 8467 * 8468 * Returns NFS_OK if the server freed "stateid". Otherwise a 8469 * negative NFS4ERR value is returned. 8470 */ 8471 static int nfs41_free_stateid(struct nfs_server *server, 8472 nfs4_stateid *stateid, 8473 struct rpc_cred *cred) 8474 { 8475 struct rpc_task *task; 8476 int ret; 8477 8478 task = _nfs41_free_stateid(server, stateid, cred, true); 8479 if (IS_ERR(task)) 8480 return PTR_ERR(task); 8481 ret = rpc_wait_for_completion_task(task); 8482 if (!ret) 8483 ret = task->tk_status; 8484 rpc_put_task(task); 8485 return ret; 8486 } 8487 8488 static void 8489 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 8490 { 8491 struct rpc_task *task; 8492 struct rpc_cred *cred = lsp->ls_state->owner->so_cred; 8493 8494 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 8495 nfs4_free_lock_state(server, lsp); 8496 if (IS_ERR(task)) 8497 return; 8498 rpc_put_task(task); 8499 } 8500 8501 static bool nfs41_match_stateid(const nfs4_stateid *s1, 8502 const nfs4_stateid *s2) 8503 { 8504 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 8505 return false; 8506 8507 if (s1->seqid == s2->seqid) 8508 return true; 8509 if (s1->seqid == 0 || s2->seqid == 0) 8510 return true; 8511 8512 return false; 8513 } 8514 8515 #endif /* CONFIG_NFS_V4_1 */ 8516 8517 static bool nfs4_match_stateid(const nfs4_stateid *s1, 8518 const nfs4_stateid *s2) 8519 { 8520 return nfs4_stateid_match(s1, s2); 8521 } 8522 8523 8524 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 8525 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 8526 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 8527 .recover_open = nfs4_open_reclaim, 8528 .recover_lock = nfs4_lock_reclaim, 8529 .establish_clid = nfs4_init_clientid, 8530 .detect_trunking = nfs40_discover_server_trunking, 8531 }; 8532 8533 #if defined(CONFIG_NFS_V4_1) 8534 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 8535 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 8536 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 8537 .recover_open = nfs4_open_reclaim, 8538 .recover_lock = nfs4_lock_reclaim, 8539 .establish_clid = nfs41_init_clientid, 8540 .reclaim_complete = nfs41_proc_reclaim_complete, 8541 .detect_trunking = nfs41_discover_server_trunking, 8542 }; 8543 #endif /* CONFIG_NFS_V4_1 */ 8544 8545 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 8546 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 8547 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 8548 .recover_open = nfs40_open_expired, 8549 .recover_lock = nfs4_lock_expired, 8550 .establish_clid = nfs4_init_clientid, 8551 }; 8552 8553 #if defined(CONFIG_NFS_V4_1) 8554 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 8555 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 8556 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 8557 .recover_open = nfs41_open_expired, 8558 .recover_lock = nfs41_lock_expired, 8559 .establish_clid = nfs41_init_clientid, 8560 }; 8561 #endif /* CONFIG_NFS_V4_1 */ 8562 8563 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 8564 .sched_state_renewal = nfs4_proc_async_renew, 8565 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, 8566 .renew_lease = nfs4_proc_renew, 8567 }; 8568 8569 #if defined(CONFIG_NFS_V4_1) 8570 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 8571 .sched_state_renewal = nfs41_proc_async_sequence, 8572 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, 8573 .renew_lease = nfs4_proc_sequence, 8574 }; 8575 #endif 8576 8577 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 8578 .get_locations = _nfs40_proc_get_locations, 8579 .fsid_present = _nfs40_proc_fsid_present, 8580 }; 8581 8582 #if defined(CONFIG_NFS_V4_1) 8583 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 8584 .get_locations = _nfs41_proc_get_locations, 8585 .fsid_present = _nfs41_proc_fsid_present, 8586 }; 8587 #endif /* CONFIG_NFS_V4_1 */ 8588 8589 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 8590 .minor_version = 0, 8591 .init_caps = NFS_CAP_READDIRPLUS 8592 | NFS_CAP_ATOMIC_OPEN 8593 | NFS_CAP_CHANGE_ATTR 8594 | NFS_CAP_POSIX_LOCK, 8595 .init_client = nfs40_init_client, 8596 .shutdown_client = nfs40_shutdown_client, 8597 .match_stateid = nfs4_match_stateid, 8598 .find_root_sec = nfs4_find_root_sec, 8599 .free_lock_state = nfs4_release_lockowner, 8600 .alloc_seqid = nfs_alloc_seqid, 8601 .call_sync_ops = &nfs40_call_sync_ops, 8602 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 8603 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 8604 .state_renewal_ops = &nfs40_state_renewal_ops, 8605 .mig_recovery_ops = &nfs40_mig_recovery_ops, 8606 }; 8607 8608 #if defined(CONFIG_NFS_V4_1) 8609 static struct nfs_seqid * 8610 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 8611 { 8612 return NULL; 8613 } 8614 8615 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 8616 .minor_version = 1, 8617 .init_caps = NFS_CAP_READDIRPLUS 8618 | NFS_CAP_ATOMIC_OPEN 8619 | NFS_CAP_CHANGE_ATTR 8620 | NFS_CAP_POSIX_LOCK 8621 | NFS_CAP_STATEID_NFSV41 8622 | NFS_CAP_ATOMIC_OPEN_V1, 8623 .init_client = nfs41_init_client, 8624 .shutdown_client = nfs41_shutdown_client, 8625 .match_stateid = nfs41_match_stateid, 8626 .find_root_sec = nfs41_find_root_sec, 8627 .free_lock_state = nfs41_free_lock_state, 8628 .alloc_seqid = nfs_alloc_no_seqid, 8629 .call_sync_ops = &nfs41_call_sync_ops, 8630 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 8631 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 8632 .state_renewal_ops = &nfs41_state_renewal_ops, 8633 .mig_recovery_ops = &nfs41_mig_recovery_ops, 8634 }; 8635 #endif 8636 8637 #if defined(CONFIG_NFS_V4_2) 8638 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 8639 .minor_version = 2, 8640 .init_caps = NFS_CAP_READDIRPLUS 8641 | NFS_CAP_ATOMIC_OPEN 8642 | NFS_CAP_CHANGE_ATTR 8643 | NFS_CAP_POSIX_LOCK 8644 | NFS_CAP_STATEID_NFSV41 8645 | NFS_CAP_ATOMIC_OPEN_V1 8646 | NFS_CAP_ALLOCATE 8647 | NFS_CAP_DEALLOCATE 8648 | NFS_CAP_SEEK 8649 | NFS_CAP_LAYOUTSTATS, 8650 .init_client = nfs41_init_client, 8651 .shutdown_client = nfs41_shutdown_client, 8652 .match_stateid = nfs41_match_stateid, 8653 .find_root_sec = nfs41_find_root_sec, 8654 .free_lock_state = nfs41_free_lock_state, 8655 .call_sync_ops = &nfs41_call_sync_ops, 8656 .alloc_seqid = nfs_alloc_no_seqid, 8657 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 8658 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 8659 .state_renewal_ops = &nfs41_state_renewal_ops, 8660 }; 8661 #endif 8662 8663 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 8664 [0] = &nfs_v4_0_minor_ops, 8665 #if defined(CONFIG_NFS_V4_1) 8666 [1] = &nfs_v4_1_minor_ops, 8667 #endif 8668 #if defined(CONFIG_NFS_V4_2) 8669 [2] = &nfs_v4_2_minor_ops, 8670 #endif 8671 }; 8672 8673 static const struct inode_operations nfs4_dir_inode_operations = { 8674 .create = nfs_create, 8675 .lookup = nfs_lookup, 8676 .atomic_open = nfs_atomic_open, 8677 .link = nfs_link, 8678 .unlink = nfs_unlink, 8679 .symlink = nfs_symlink, 8680 .mkdir = nfs_mkdir, 8681 .rmdir = nfs_rmdir, 8682 .mknod = nfs_mknod, 8683 .rename = nfs_rename, 8684 .permission = nfs_permission, 8685 .getattr = nfs_getattr, 8686 .setattr = nfs_setattr, 8687 .getxattr = generic_getxattr, 8688 .setxattr = generic_setxattr, 8689 .listxattr = generic_listxattr, 8690 .removexattr = generic_removexattr, 8691 }; 8692 8693 static const struct inode_operations nfs4_file_inode_operations = { 8694 .permission = nfs_permission, 8695 .getattr = nfs_getattr, 8696 .setattr = nfs_setattr, 8697 .getxattr = generic_getxattr, 8698 .setxattr = generic_setxattr, 8699 .listxattr = generic_listxattr, 8700 .removexattr = generic_removexattr, 8701 }; 8702 8703 const struct nfs_rpc_ops nfs_v4_clientops = { 8704 .version = 4, /* protocol version */ 8705 .dentry_ops = &nfs4_dentry_operations, 8706 .dir_inode_ops = &nfs4_dir_inode_operations, 8707 .file_inode_ops = &nfs4_file_inode_operations, 8708 .file_ops = &nfs4_file_operations, 8709 .getroot = nfs4_proc_get_root, 8710 .submount = nfs4_submount, 8711 .try_mount = nfs4_try_mount, 8712 .getattr = nfs4_proc_getattr, 8713 .setattr = nfs4_proc_setattr, 8714 .lookup = nfs4_proc_lookup, 8715 .access = nfs4_proc_access, 8716 .readlink = nfs4_proc_readlink, 8717 .create = nfs4_proc_create, 8718 .remove = nfs4_proc_remove, 8719 .unlink_setup = nfs4_proc_unlink_setup, 8720 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 8721 .unlink_done = nfs4_proc_unlink_done, 8722 .rename_setup = nfs4_proc_rename_setup, 8723 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 8724 .rename_done = nfs4_proc_rename_done, 8725 .link = nfs4_proc_link, 8726 .symlink = nfs4_proc_symlink, 8727 .mkdir = nfs4_proc_mkdir, 8728 .rmdir = nfs4_proc_remove, 8729 .readdir = nfs4_proc_readdir, 8730 .mknod = nfs4_proc_mknod, 8731 .statfs = nfs4_proc_statfs, 8732 .fsinfo = nfs4_proc_fsinfo, 8733 .pathconf = nfs4_proc_pathconf, 8734 .set_capabilities = nfs4_server_capabilities, 8735 .decode_dirent = nfs4_decode_dirent, 8736 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 8737 .read_setup = nfs4_proc_read_setup, 8738 .read_done = nfs4_read_done, 8739 .write_setup = nfs4_proc_write_setup, 8740 .write_done = nfs4_write_done, 8741 .commit_setup = nfs4_proc_commit_setup, 8742 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 8743 .commit_done = nfs4_commit_done, 8744 .lock = nfs4_proc_lock, 8745 .clear_acl_cache = nfs4_zap_acl_attr, 8746 .close_context = nfs4_close_context, 8747 .open_context = nfs4_atomic_open, 8748 .have_delegation = nfs4_have_delegation, 8749 .return_delegation = nfs4_inode_return_delegation, 8750 .alloc_client = nfs4_alloc_client, 8751 .init_client = nfs4_init_client, 8752 .free_client = nfs4_free_client, 8753 .create_server = nfs4_create_server, 8754 .clone_server = nfs_clone_server, 8755 }; 8756 8757 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 8758 .prefix = XATTR_NAME_NFSV4_ACL, 8759 .list = nfs4_xattr_list_nfs4_acl, 8760 .get = nfs4_xattr_get_nfs4_acl, 8761 .set = nfs4_xattr_set_nfs4_acl, 8762 }; 8763 8764 const struct xattr_handler *nfs4_xattr_handlers[] = { 8765 &nfs4_xattr_nfs4_acl_handler, 8766 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 8767 &nfs4_xattr_nfs4_label_handler, 8768 #endif 8769 NULL 8770 }; 8771 8772 /* 8773 * Local variables: 8774 * c-basic-offset: 8 8775 * End: 8776 */ 8777