1 /* 2 * fs/nfs/nfs4proc.c 3 * 4 * Client-side procedure declarations for NFSv4. 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <linux/mm.h> 39 #include <linux/delay.h> 40 #include <linux/errno.h> 41 #include <linux/string.h> 42 #include <linux/ratelimit.h> 43 #include <linux/printk.h> 44 #include <linux/slab.h> 45 #include <linux/sunrpc/clnt.h> 46 #include <linux/nfs.h> 47 #include <linux/nfs4.h> 48 #include <linux/nfs_fs.h> 49 #include <linux/nfs_page.h> 50 #include <linux/nfs_mount.h> 51 #include <linux/namei.h> 52 #include <linux/mount.h> 53 #include <linux/module.h> 54 #include <linux/nfs_idmap.h> 55 #include <linux/xattr.h> 56 #include <linux/utsname.h> 57 #include <linux/freezer.h> 58 59 #include "nfs4_fs.h" 60 #include "delegation.h" 61 #include "internal.h" 62 #include "iostat.h" 63 #include "callback.h" 64 #include "pnfs.h" 65 #include "netns.h" 66 #include "nfs4session.h" 67 #include "fscache.h" 68 69 #include "nfs4trace.h" 70 71 #define NFSDBG_FACILITY NFSDBG_PROC 72 73 #define NFS4_POLL_RETRY_MIN (HZ/10) 74 #define NFS4_POLL_RETRY_MAX (15*HZ) 75 76 struct nfs4_opendata; 77 static int _nfs4_proc_open(struct nfs4_opendata *data); 78 static int _nfs4_recover_proc_open(struct nfs4_opendata *data); 79 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 80 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *); 81 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); 82 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label); 83 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label); 84 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 85 struct nfs_fattr *fattr, struct iattr *sattr, 86 struct nfs4_state *state, struct nfs4_label *ilabel, 87 struct nfs4_label *olabel); 88 #ifdef CONFIG_NFS_V4_1 89 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 90 struct rpc_cred *); 91 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *, 92 struct rpc_cred *); 93 #endif 94 95 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 96 static inline struct nfs4_label * 97 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 98 struct iattr *sattr, struct nfs4_label *label) 99 { 100 int err; 101 102 if (label == NULL) 103 return NULL; 104 105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 106 return NULL; 107 108 err = security_dentry_init_security(dentry, sattr->ia_mode, 109 &dentry->d_name, (void **)&label->label, &label->len); 110 if (err == 0) 111 return label; 112 113 return NULL; 114 } 115 static inline void 116 nfs4_label_release_security(struct nfs4_label *label) 117 { 118 if (label) 119 security_release_secctx(label->label, label->len); 120 } 121 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 122 { 123 if (label) 124 return server->attr_bitmask; 125 126 return server->attr_bitmask_nl; 127 } 128 #else 129 static inline struct nfs4_label * 130 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 131 struct iattr *sattr, struct nfs4_label *l) 132 { return NULL; } 133 static inline void 134 nfs4_label_release_security(struct nfs4_label *label) 135 { return; } 136 static inline u32 * 137 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 138 { return server->attr_bitmask; } 139 #endif 140 141 /* Prevent leaks of NFSv4 errors into userland */ 142 static int nfs4_map_errors(int err) 143 { 144 if (err >= -1000) 145 return err; 146 switch (err) { 147 case -NFS4ERR_RESOURCE: 148 case -NFS4ERR_LAYOUTTRYLATER: 149 case -NFS4ERR_RECALLCONFLICT: 150 return -EREMOTEIO; 151 case -NFS4ERR_WRONGSEC: 152 case -NFS4ERR_WRONG_CRED: 153 return -EPERM; 154 case -NFS4ERR_BADOWNER: 155 case -NFS4ERR_BADNAME: 156 return -EINVAL; 157 case -NFS4ERR_SHARE_DENIED: 158 return -EACCES; 159 case -NFS4ERR_MINOR_VERS_MISMATCH: 160 return -EPROTONOSUPPORT; 161 case -NFS4ERR_ACCESS: 162 return -EACCES; 163 case -NFS4ERR_FILE_OPEN: 164 return -EBUSY; 165 default: 166 dprintk("%s could not handle NFSv4 error %d\n", 167 __func__, -err); 168 break; 169 } 170 return -EIO; 171 } 172 173 /* 174 * This is our standard bitmap for GETATTR requests. 175 */ 176 const u32 nfs4_fattr_bitmap[3] = { 177 FATTR4_WORD0_TYPE 178 | FATTR4_WORD0_CHANGE 179 | FATTR4_WORD0_SIZE 180 | FATTR4_WORD0_FSID 181 | FATTR4_WORD0_FILEID, 182 FATTR4_WORD1_MODE 183 | FATTR4_WORD1_NUMLINKS 184 | FATTR4_WORD1_OWNER 185 | FATTR4_WORD1_OWNER_GROUP 186 | FATTR4_WORD1_RAWDEV 187 | FATTR4_WORD1_SPACE_USED 188 | FATTR4_WORD1_TIME_ACCESS 189 | FATTR4_WORD1_TIME_METADATA 190 | FATTR4_WORD1_TIME_MODIFY, 191 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 192 FATTR4_WORD2_SECURITY_LABEL 193 #endif 194 }; 195 196 static const u32 nfs4_pnfs_open_bitmap[3] = { 197 FATTR4_WORD0_TYPE 198 | FATTR4_WORD0_CHANGE 199 | FATTR4_WORD0_SIZE 200 | FATTR4_WORD0_FSID 201 | FATTR4_WORD0_FILEID, 202 FATTR4_WORD1_MODE 203 | FATTR4_WORD1_NUMLINKS 204 | FATTR4_WORD1_OWNER 205 | FATTR4_WORD1_OWNER_GROUP 206 | FATTR4_WORD1_RAWDEV 207 | FATTR4_WORD1_SPACE_USED 208 | FATTR4_WORD1_TIME_ACCESS 209 | FATTR4_WORD1_TIME_METADATA 210 | FATTR4_WORD1_TIME_MODIFY, 211 FATTR4_WORD2_MDSTHRESHOLD 212 }; 213 214 static const u32 nfs4_open_noattr_bitmap[3] = { 215 FATTR4_WORD0_TYPE 216 | FATTR4_WORD0_CHANGE 217 | FATTR4_WORD0_FILEID, 218 }; 219 220 const u32 nfs4_statfs_bitmap[3] = { 221 FATTR4_WORD0_FILES_AVAIL 222 | FATTR4_WORD0_FILES_FREE 223 | FATTR4_WORD0_FILES_TOTAL, 224 FATTR4_WORD1_SPACE_AVAIL 225 | FATTR4_WORD1_SPACE_FREE 226 | FATTR4_WORD1_SPACE_TOTAL 227 }; 228 229 const u32 nfs4_pathconf_bitmap[3] = { 230 FATTR4_WORD0_MAXLINK 231 | FATTR4_WORD0_MAXNAME, 232 0 233 }; 234 235 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 236 | FATTR4_WORD0_MAXREAD 237 | FATTR4_WORD0_MAXWRITE 238 | FATTR4_WORD0_LEASE_TIME, 239 FATTR4_WORD1_TIME_DELTA 240 | FATTR4_WORD1_FS_LAYOUT_TYPES, 241 FATTR4_WORD2_LAYOUT_BLKSIZE 242 }; 243 244 const u32 nfs4_fs_locations_bitmap[3] = { 245 FATTR4_WORD0_TYPE 246 | FATTR4_WORD0_CHANGE 247 | FATTR4_WORD0_SIZE 248 | FATTR4_WORD0_FSID 249 | FATTR4_WORD0_FILEID 250 | FATTR4_WORD0_FS_LOCATIONS, 251 FATTR4_WORD1_MODE 252 | FATTR4_WORD1_NUMLINKS 253 | FATTR4_WORD1_OWNER 254 | FATTR4_WORD1_OWNER_GROUP 255 | FATTR4_WORD1_RAWDEV 256 | FATTR4_WORD1_SPACE_USED 257 | FATTR4_WORD1_TIME_ACCESS 258 | FATTR4_WORD1_TIME_METADATA 259 | FATTR4_WORD1_TIME_MODIFY 260 | FATTR4_WORD1_MOUNTED_ON_FILEID, 261 }; 262 263 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 264 struct nfs4_readdir_arg *readdir) 265 { 266 __be32 *start, *p; 267 268 if (cookie > 2) { 269 readdir->cookie = cookie; 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 271 return; 272 } 273 274 readdir->cookie = 0; 275 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 276 if (cookie == 2) 277 return; 278 279 /* 280 * NFSv4 servers do not return entries for '.' and '..' 281 * Therefore, we fake these entries here. We let '.' 282 * have cookie 0 and '..' have cookie 1. Note that 283 * when talking to the server, we always send cookie 0 284 * instead of 1 or 2. 285 */ 286 start = p = kmap_atomic(*readdir->pages); 287 288 if (cookie == 0) { 289 *p++ = xdr_one; /* next */ 290 *p++ = xdr_zero; /* cookie, first word */ 291 *p++ = xdr_one; /* cookie, second word */ 292 *p++ = xdr_one; /* entry len */ 293 memcpy(p, ".\0\0\0", 4); /* entry */ 294 p++; 295 *p++ = xdr_one; /* bitmap length */ 296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ 297 *p++ = htonl(8); /* attribute buffer length */ 298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode)); 299 } 300 301 *p++ = xdr_one; /* next */ 302 *p++ = xdr_zero; /* cookie, first word */ 303 *p++ = xdr_two; /* cookie, second word */ 304 *p++ = xdr_two; /* entry len */ 305 memcpy(p, "..\0\0", 4); /* entry */ 306 p++; 307 *p++ = xdr_one; /* bitmap length */ 308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ 309 *p++ = htonl(8); /* attribute buffer length */ 310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode)); 311 312 readdir->pgbase = (char *)p - (char *)start; 313 readdir->count -= readdir->pgbase; 314 kunmap_atomic(start); 315 } 316 317 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) 318 { 319 int res = 0; 320 321 might_sleep(); 322 323 if (*timeout <= 0) 324 *timeout = NFS4_POLL_RETRY_MIN; 325 if (*timeout > NFS4_POLL_RETRY_MAX) 326 *timeout = NFS4_POLL_RETRY_MAX; 327 freezable_schedule_timeout_killable_unsafe(*timeout); 328 if (fatal_signal_pending(current)) 329 res = -ERESTARTSYS; 330 *timeout <<= 1; 331 return res; 332 } 333 334 /* This is the error handling routine for processes that are allowed 335 * to sleep. 336 */ 337 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 338 { 339 struct nfs_client *clp = server->nfs_client; 340 struct nfs4_state *state = exception->state; 341 struct inode *inode = exception->inode; 342 int ret = errorcode; 343 344 exception->retry = 0; 345 switch(errorcode) { 346 case 0: 347 return 0; 348 case -NFS4ERR_OPENMODE: 349 if (inode && nfs4_have_delegation(inode, FMODE_READ)) { 350 nfs4_inode_return_delegation(inode); 351 exception->retry = 1; 352 return 0; 353 } 354 if (state == NULL) 355 break; 356 ret = nfs4_schedule_stateid_recovery(server, state); 357 if (ret < 0) 358 break; 359 goto wait_on_recovery; 360 case -NFS4ERR_DELEG_REVOKED: 361 case -NFS4ERR_ADMIN_REVOKED: 362 case -NFS4ERR_BAD_STATEID: 363 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) { 364 nfs_remove_bad_delegation(inode); 365 exception->retry = 1; 366 break; 367 } 368 if (state == NULL) 369 break; 370 ret = nfs4_schedule_stateid_recovery(server, state); 371 if (ret < 0) 372 break; 373 goto wait_on_recovery; 374 case -NFS4ERR_EXPIRED: 375 if (state != NULL) { 376 ret = nfs4_schedule_stateid_recovery(server, state); 377 if (ret < 0) 378 break; 379 } 380 case -NFS4ERR_STALE_STATEID: 381 case -NFS4ERR_STALE_CLIENTID: 382 nfs4_schedule_lease_recovery(clp); 383 goto wait_on_recovery; 384 case -NFS4ERR_MOVED: 385 ret = nfs4_schedule_migration_recovery(server); 386 if (ret < 0) 387 break; 388 goto wait_on_recovery; 389 case -NFS4ERR_LEASE_MOVED: 390 nfs4_schedule_lease_moved_recovery(clp); 391 goto wait_on_recovery; 392 #if defined(CONFIG_NFS_V4_1) 393 case -NFS4ERR_BADSESSION: 394 case -NFS4ERR_BADSLOT: 395 case -NFS4ERR_BAD_HIGH_SLOT: 396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 397 case -NFS4ERR_DEADSESSION: 398 case -NFS4ERR_SEQ_FALSE_RETRY: 399 case -NFS4ERR_SEQ_MISORDERED: 400 dprintk("%s ERROR: %d Reset session\n", __func__, 401 errorcode); 402 nfs4_schedule_session_recovery(clp->cl_session, errorcode); 403 goto wait_on_recovery; 404 #endif /* defined(CONFIG_NFS_V4_1) */ 405 case -NFS4ERR_FILE_OPEN: 406 if (exception->timeout > HZ) { 407 /* We have retried a decent amount, time to 408 * fail 409 */ 410 ret = -EBUSY; 411 break; 412 } 413 case -NFS4ERR_GRACE: 414 case -NFS4ERR_DELAY: 415 ret = nfs4_delay(server->client, &exception->timeout); 416 if (ret != 0) 417 break; 418 case -NFS4ERR_RETRY_UNCACHED_REP: 419 case -NFS4ERR_OLD_STATEID: 420 exception->retry = 1; 421 break; 422 case -NFS4ERR_BADOWNER: 423 /* The following works around a Linux server bug! */ 424 case -NFS4ERR_BADNAME: 425 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 426 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 427 exception->retry = 1; 428 printk(KERN_WARNING "NFS: v4 server %s " 429 "does not accept raw " 430 "uid/gids. " 431 "Reenabling the idmapper.\n", 432 server->nfs_client->cl_hostname); 433 } 434 } 435 /* We failed to handle the error */ 436 return nfs4_map_errors(ret); 437 wait_on_recovery: 438 ret = nfs4_wait_clnt_recover(clp); 439 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 440 return -EIO; 441 if (ret == 0) 442 exception->retry = 1; 443 return ret; 444 } 445 446 /* 447 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 448 * or 'false' otherwise. 449 */ 450 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 451 { 452 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 453 454 if (flavor == RPC_AUTH_GSS_KRB5I || 455 flavor == RPC_AUTH_GSS_KRB5P) 456 return true; 457 458 return false; 459 } 460 461 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 462 { 463 spin_lock(&clp->cl_lock); 464 if (time_before(clp->cl_last_renewal,timestamp)) 465 clp->cl_last_renewal = timestamp; 466 spin_unlock(&clp->cl_lock); 467 } 468 469 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 470 { 471 do_renew_lease(server->nfs_client, timestamp); 472 } 473 474 struct nfs4_call_sync_data { 475 const struct nfs_server *seq_server; 476 struct nfs4_sequence_args *seq_args; 477 struct nfs4_sequence_res *seq_res; 478 }; 479 480 static void nfs4_init_sequence(struct nfs4_sequence_args *args, 481 struct nfs4_sequence_res *res, int cache_reply) 482 { 483 args->sa_slot = NULL; 484 args->sa_cache_this = cache_reply; 485 args->sa_privileged = 0; 486 487 res->sr_slot = NULL; 488 } 489 490 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args) 491 { 492 args->sa_privileged = 1; 493 } 494 495 static int nfs40_setup_sequence(const struct nfs_server *server, 496 struct nfs4_sequence_args *args, 497 struct nfs4_sequence_res *res, 498 struct rpc_task *task) 499 { 500 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl; 501 struct nfs4_slot *slot; 502 503 /* slot already allocated? */ 504 if (res->sr_slot != NULL) 505 goto out_start; 506 507 spin_lock(&tbl->slot_tbl_lock); 508 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 509 goto out_sleep; 510 511 slot = nfs4_alloc_slot(tbl); 512 if (IS_ERR(slot)) { 513 if (slot == ERR_PTR(-ENOMEM)) 514 task->tk_timeout = HZ >> 2; 515 goto out_sleep; 516 } 517 spin_unlock(&tbl->slot_tbl_lock); 518 519 args->sa_slot = slot; 520 res->sr_slot = slot; 521 522 out_start: 523 rpc_call_start(task); 524 return 0; 525 526 out_sleep: 527 if (args->sa_privileged) 528 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 529 NULL, RPC_PRIORITY_PRIVILEGED); 530 else 531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 532 spin_unlock(&tbl->slot_tbl_lock); 533 return -EAGAIN; 534 } 535 536 static int nfs40_sequence_done(struct rpc_task *task, 537 struct nfs4_sequence_res *res) 538 { 539 struct nfs4_slot *slot = res->sr_slot; 540 struct nfs4_slot_table *tbl; 541 542 if (slot == NULL) 543 goto out; 544 545 tbl = slot->table; 546 spin_lock(&tbl->slot_tbl_lock); 547 if (!nfs41_wake_and_assign_slot(tbl, slot)) 548 nfs4_free_slot(tbl, slot); 549 spin_unlock(&tbl->slot_tbl_lock); 550 551 res->sr_slot = NULL; 552 out: 553 return 1; 554 } 555 556 #if defined(CONFIG_NFS_V4_1) 557 558 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 559 { 560 struct nfs4_session *session; 561 struct nfs4_slot_table *tbl; 562 struct nfs4_slot *slot = res->sr_slot; 563 bool send_new_highest_used_slotid = false; 564 565 tbl = slot->table; 566 session = tbl->session; 567 568 spin_lock(&tbl->slot_tbl_lock); 569 /* Be nice to the server: try to ensure that the last transmitted 570 * value for highest_user_slotid <= target_highest_slotid 571 */ 572 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 573 send_new_highest_used_slotid = true; 574 575 if (nfs41_wake_and_assign_slot(tbl, slot)) { 576 send_new_highest_used_slotid = false; 577 goto out_unlock; 578 } 579 nfs4_free_slot(tbl, slot); 580 581 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 582 send_new_highest_used_slotid = false; 583 out_unlock: 584 spin_unlock(&tbl->slot_tbl_lock); 585 res->sr_slot = NULL; 586 if (send_new_highest_used_slotid) 587 nfs41_server_notify_highest_slotid_update(session->clp); 588 } 589 590 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 591 { 592 struct nfs4_session *session; 593 struct nfs4_slot *slot = res->sr_slot; 594 struct nfs_client *clp; 595 bool interrupted = false; 596 int ret = 1; 597 598 if (slot == NULL) 599 goto out_noaction; 600 /* don't increment the sequence number if the task wasn't sent */ 601 if (!RPC_WAS_SENT(task)) 602 goto out; 603 604 session = slot->table->session; 605 606 if (slot->interrupted) { 607 slot->interrupted = 0; 608 interrupted = true; 609 } 610 611 trace_nfs4_sequence_done(session, res); 612 /* Check the SEQUENCE operation status */ 613 switch (res->sr_status) { 614 case 0: 615 /* Update the slot's sequence and clientid lease timer */ 616 ++slot->seq_nr; 617 clp = session->clp; 618 do_renew_lease(clp, res->sr_timestamp); 619 /* Check sequence flags */ 620 if (res->sr_status_flags != 0) 621 nfs4_schedule_lease_recovery(clp); 622 nfs41_update_target_slotid(slot->table, slot, res); 623 break; 624 case 1: 625 /* 626 * sr_status remains 1 if an RPC level error occurred. 627 * The server may or may not have processed the sequence 628 * operation.. 629 * Mark the slot as having hosted an interrupted RPC call. 630 */ 631 slot->interrupted = 1; 632 goto out; 633 case -NFS4ERR_DELAY: 634 /* The server detected a resend of the RPC call and 635 * returned NFS4ERR_DELAY as per Section 2.10.6.2 636 * of RFC5661. 637 */ 638 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 639 __func__, 640 slot->slot_nr, 641 slot->seq_nr); 642 goto out_retry; 643 case -NFS4ERR_BADSLOT: 644 /* 645 * The slot id we used was probably retired. Try again 646 * using a different slot id. 647 */ 648 goto retry_nowait; 649 case -NFS4ERR_SEQ_MISORDERED: 650 /* 651 * Was the last operation on this sequence interrupted? 652 * If so, retry after bumping the sequence number. 653 */ 654 if (interrupted) { 655 ++slot->seq_nr; 656 goto retry_nowait; 657 } 658 /* 659 * Could this slot have been previously retired? 660 * If so, then the server may be expecting seq_nr = 1! 661 */ 662 if (slot->seq_nr != 1) { 663 slot->seq_nr = 1; 664 goto retry_nowait; 665 } 666 break; 667 case -NFS4ERR_SEQ_FALSE_RETRY: 668 ++slot->seq_nr; 669 goto retry_nowait; 670 default: 671 /* Just update the slot sequence no. */ 672 ++slot->seq_nr; 673 } 674 out: 675 /* The session may be reset by one of the error handlers. */ 676 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 677 nfs41_sequence_free_slot(res); 678 out_noaction: 679 return ret; 680 retry_nowait: 681 if (rpc_restart_call_prepare(task)) { 682 task->tk_status = 0; 683 ret = 0; 684 } 685 goto out; 686 out_retry: 687 if (!rpc_restart_call(task)) 688 goto out; 689 rpc_delay(task, NFS4_POLL_RETRY_MAX); 690 return 0; 691 } 692 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 693 694 static int nfs4_sequence_done(struct rpc_task *task, 695 struct nfs4_sequence_res *res) 696 { 697 if (res->sr_slot == NULL) 698 return 1; 699 if (!res->sr_slot->table->session) 700 return nfs40_sequence_done(task, res); 701 return nfs41_sequence_done(task, res); 702 } 703 704 int nfs41_setup_sequence(struct nfs4_session *session, 705 struct nfs4_sequence_args *args, 706 struct nfs4_sequence_res *res, 707 struct rpc_task *task) 708 { 709 struct nfs4_slot *slot; 710 struct nfs4_slot_table *tbl; 711 712 dprintk("--> %s\n", __func__); 713 /* slot already allocated? */ 714 if (res->sr_slot != NULL) 715 goto out_success; 716 717 tbl = &session->fc_slot_table; 718 719 task->tk_timeout = 0; 720 721 spin_lock(&tbl->slot_tbl_lock); 722 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) && 723 !args->sa_privileged) { 724 /* The state manager will wait until the slot table is empty */ 725 dprintk("%s session is draining\n", __func__); 726 goto out_sleep; 727 } 728 729 slot = nfs4_alloc_slot(tbl); 730 if (IS_ERR(slot)) { 731 /* If out of memory, try again in 1/4 second */ 732 if (slot == ERR_PTR(-ENOMEM)) 733 task->tk_timeout = HZ >> 2; 734 dprintk("<-- %s: no free slots\n", __func__); 735 goto out_sleep; 736 } 737 spin_unlock(&tbl->slot_tbl_lock); 738 739 args->sa_slot = slot; 740 741 dprintk("<-- %s slotid=%u seqid=%u\n", __func__, 742 slot->slot_nr, slot->seq_nr); 743 744 res->sr_slot = slot; 745 res->sr_timestamp = jiffies; 746 res->sr_status_flags = 0; 747 /* 748 * sr_status is only set in decode_sequence, and so will remain 749 * set to 1 if an rpc level failure occurs. 750 */ 751 res->sr_status = 1; 752 trace_nfs4_setup_sequence(session, args); 753 out_success: 754 rpc_call_start(task); 755 return 0; 756 out_sleep: 757 /* Privileged tasks are queued with top priority */ 758 if (args->sa_privileged) 759 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 760 NULL, RPC_PRIORITY_PRIVILEGED); 761 else 762 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 763 spin_unlock(&tbl->slot_tbl_lock); 764 return -EAGAIN; 765 } 766 EXPORT_SYMBOL_GPL(nfs41_setup_sequence); 767 768 static int nfs4_setup_sequence(const struct nfs_server *server, 769 struct nfs4_sequence_args *args, 770 struct nfs4_sequence_res *res, 771 struct rpc_task *task) 772 { 773 struct nfs4_session *session = nfs4_get_session(server); 774 int ret = 0; 775 776 if (!session) 777 return nfs40_setup_sequence(server, 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, args, res, task); 819 } 820 821 static int nfs4_sequence_done(struct rpc_task *task, 822 struct nfs4_sequence_res *res) 823 { 824 return nfs40_sequence_done(task, res); 825 } 826 827 #endif /* !CONFIG_NFS_V4_1 */ 828 829 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 830 { 831 struct nfs4_call_sync_data *data = calldata; 832 nfs4_setup_sequence(data->seq_server, 833 data->seq_args, data->seq_res, task); 834 } 835 836 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 837 { 838 struct nfs4_call_sync_data *data = calldata; 839 nfs4_sequence_done(task, data->seq_res); 840 } 841 842 static const struct rpc_call_ops nfs40_call_sync_ops = { 843 .rpc_call_prepare = nfs40_call_sync_prepare, 844 .rpc_call_done = nfs40_call_sync_done, 845 }; 846 847 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 848 struct nfs_server *server, 849 struct rpc_message *msg, 850 struct nfs4_sequence_args *args, 851 struct nfs4_sequence_res *res) 852 { 853 int ret; 854 struct rpc_task *task; 855 struct nfs_client *clp = server->nfs_client; 856 struct nfs4_call_sync_data data = { 857 .seq_server = server, 858 .seq_args = args, 859 .seq_res = res, 860 }; 861 struct rpc_task_setup task_setup = { 862 .rpc_client = clnt, 863 .rpc_message = msg, 864 .callback_ops = clp->cl_mvops->call_sync_ops, 865 .callback_data = &data 866 }; 867 868 task = rpc_run_task(&task_setup); 869 if (IS_ERR(task)) 870 ret = PTR_ERR(task); 871 else { 872 ret = task->tk_status; 873 rpc_put_task(task); 874 } 875 return ret; 876 } 877 878 static 879 int nfs4_call_sync(struct rpc_clnt *clnt, 880 struct nfs_server *server, 881 struct rpc_message *msg, 882 struct nfs4_sequence_args *args, 883 struct nfs4_sequence_res *res, 884 int cache_reply) 885 { 886 nfs4_init_sequence(args, res, cache_reply); 887 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 888 } 889 890 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) 891 { 892 struct nfs_inode *nfsi = NFS_I(dir); 893 894 spin_lock(&dir->i_lock); 895 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; 896 if (!cinfo->atomic || cinfo->before != dir->i_version) 897 nfs_force_lookup_revalidate(dir); 898 dir->i_version = cinfo->after; 899 nfs_fscache_invalidate(dir); 900 spin_unlock(&dir->i_lock); 901 } 902 903 struct nfs4_opendata { 904 struct kref kref; 905 struct nfs_openargs o_arg; 906 struct nfs_openres o_res; 907 struct nfs_open_confirmargs c_arg; 908 struct nfs_open_confirmres c_res; 909 struct nfs4_string owner_name; 910 struct nfs4_string group_name; 911 struct nfs_fattr f_attr; 912 struct nfs4_label *f_label; 913 struct dentry *dir; 914 struct dentry *dentry; 915 struct nfs4_state_owner *owner; 916 struct nfs4_state *state; 917 struct iattr attrs; 918 unsigned long timestamp; 919 unsigned int rpc_done : 1; 920 unsigned int file_created : 1; 921 unsigned int is_recover : 1; 922 int rpc_status; 923 int cancelled; 924 }; 925 926 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 927 int err, struct nfs4_exception *exception) 928 { 929 if (err != -EINVAL) 930 return false; 931 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 932 return false; 933 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 934 exception->retry = 1; 935 return true; 936 } 937 938 static enum open_claim_type4 939 nfs4_map_atomic_open_claim(struct nfs_server *server, 940 enum open_claim_type4 claim) 941 { 942 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 943 return claim; 944 switch (claim) { 945 default: 946 return claim; 947 case NFS4_OPEN_CLAIM_FH: 948 return NFS4_OPEN_CLAIM_NULL; 949 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 950 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 951 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 952 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 953 } 954 } 955 956 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 957 { 958 p->o_res.f_attr = &p->f_attr; 959 p->o_res.f_label = p->f_label; 960 p->o_res.seqid = p->o_arg.seqid; 961 p->c_res.seqid = p->c_arg.seqid; 962 p->o_res.server = p->o_arg.server; 963 p->o_res.access_request = p->o_arg.access; 964 nfs_fattr_init(&p->f_attr); 965 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 966 } 967 968 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 969 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 970 const struct iattr *attrs, 971 struct nfs4_label *label, 972 enum open_claim_type4 claim, 973 gfp_t gfp_mask) 974 { 975 struct dentry *parent = dget_parent(dentry); 976 struct inode *dir = parent->d_inode; 977 struct nfs_server *server = NFS_SERVER(dir); 978 struct nfs4_opendata *p; 979 980 p = kzalloc(sizeof(*p), gfp_mask); 981 if (p == NULL) 982 goto err; 983 984 p->f_label = nfs4_label_alloc(server, gfp_mask); 985 if (IS_ERR(p->f_label)) 986 goto err_free_p; 987 988 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask); 989 if (p->o_arg.seqid == NULL) 990 goto err_free_label; 991 nfs_sb_active(dentry->d_sb); 992 p->dentry = dget(dentry); 993 p->dir = parent; 994 p->owner = sp; 995 atomic_inc(&sp->so_count); 996 p->o_arg.open_flags = flags; 997 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 998 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS 999 * will return permission denied for all bits until close */ 1000 if (!(flags & O_EXCL)) { 1001 /* ask server to check for all possible rights as results 1002 * are cached */ 1003 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | 1004 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE; 1005 } 1006 p->o_arg.clientid = server->nfs_client->cl_clientid; 1007 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1008 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1009 p->o_arg.name = &dentry->d_name; 1010 p->o_arg.server = server; 1011 p->o_arg.bitmask = nfs4_bitmask(server, label); 1012 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1013 p->o_arg.label = label; 1014 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1015 switch (p->o_arg.claim) { 1016 case NFS4_OPEN_CLAIM_NULL: 1017 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1018 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1019 p->o_arg.fh = NFS_FH(dir); 1020 break; 1021 case NFS4_OPEN_CLAIM_PREVIOUS: 1022 case NFS4_OPEN_CLAIM_FH: 1023 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1024 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1025 p->o_arg.fh = NFS_FH(dentry->d_inode); 1026 } 1027 if (attrs != NULL && attrs->ia_valid != 0) { 1028 __u32 verf[2]; 1029 1030 p->o_arg.u.attrs = &p->attrs; 1031 memcpy(&p->attrs, attrs, sizeof(p->attrs)); 1032 1033 verf[0] = jiffies; 1034 verf[1] = current->pid; 1035 memcpy(p->o_arg.u.verifier.data, verf, 1036 sizeof(p->o_arg.u.verifier.data)); 1037 } 1038 p->c_arg.fh = &p->o_res.fh; 1039 p->c_arg.stateid = &p->o_res.stateid; 1040 p->c_arg.seqid = p->o_arg.seqid; 1041 nfs4_init_opendata_res(p); 1042 kref_init(&p->kref); 1043 return p; 1044 1045 err_free_label: 1046 nfs4_label_free(p->f_label); 1047 err_free_p: 1048 kfree(p); 1049 err: 1050 dput(parent); 1051 return NULL; 1052 } 1053 1054 static void nfs4_opendata_free(struct kref *kref) 1055 { 1056 struct nfs4_opendata *p = container_of(kref, 1057 struct nfs4_opendata, kref); 1058 struct super_block *sb = p->dentry->d_sb; 1059 1060 nfs_free_seqid(p->o_arg.seqid); 1061 if (p->state != NULL) 1062 nfs4_put_open_state(p->state); 1063 nfs4_put_state_owner(p->owner); 1064 1065 nfs4_label_free(p->f_label); 1066 1067 dput(p->dir); 1068 dput(p->dentry); 1069 nfs_sb_deactive(sb); 1070 nfs_fattr_free_names(&p->f_attr); 1071 kfree(p->f_attr.mdsthreshold); 1072 kfree(p); 1073 } 1074 1075 static void nfs4_opendata_put(struct nfs4_opendata *p) 1076 { 1077 if (p != NULL) 1078 kref_put(&p->kref, nfs4_opendata_free); 1079 } 1080 1081 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) 1082 { 1083 int ret; 1084 1085 ret = rpc_wait_for_completion_task(task); 1086 return ret; 1087 } 1088 1089 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) 1090 { 1091 int ret = 0; 1092 1093 if (open_mode & (O_EXCL|O_TRUNC)) 1094 goto out; 1095 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1096 case FMODE_READ: 1097 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1098 && state->n_rdonly != 0; 1099 break; 1100 case FMODE_WRITE: 1101 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1102 && state->n_wronly != 0; 1103 break; 1104 case FMODE_READ|FMODE_WRITE: 1105 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1106 && state->n_rdwr != 0; 1107 } 1108 out: 1109 return ret; 1110 } 1111 1112 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode) 1113 { 1114 if (delegation == NULL) 1115 return 0; 1116 if ((delegation->type & fmode) != fmode) 1117 return 0; 1118 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1119 return 0; 1120 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) 1121 return 0; 1122 nfs_mark_delegation_referenced(delegation); 1123 return 1; 1124 } 1125 1126 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1127 { 1128 switch (fmode) { 1129 case FMODE_WRITE: 1130 state->n_wronly++; 1131 break; 1132 case FMODE_READ: 1133 state->n_rdonly++; 1134 break; 1135 case FMODE_READ|FMODE_WRITE: 1136 state->n_rdwr++; 1137 } 1138 nfs4_state_set_mode_locked(state, state->state | fmode); 1139 } 1140 1141 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1142 { 1143 struct nfs_client *clp = state->owner->so_server->nfs_client; 1144 bool need_recover = false; 1145 1146 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1147 need_recover = true; 1148 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1149 need_recover = true; 1150 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1151 need_recover = true; 1152 if (need_recover) 1153 nfs4_state_mark_reclaim_nograce(clp, state); 1154 } 1155 1156 static bool nfs_need_update_open_stateid(struct nfs4_state *state, 1157 nfs4_stateid *stateid) 1158 { 1159 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0) 1160 return true; 1161 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1162 nfs_test_and_clear_all_open_stateid(state); 1163 return true; 1164 } 1165 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) 1166 return true; 1167 return false; 1168 } 1169 1170 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1171 nfs4_stateid *stateid, fmode_t fmode) 1172 { 1173 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1174 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1175 case FMODE_WRITE: 1176 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1177 break; 1178 case FMODE_READ: 1179 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1180 break; 1181 case 0: 1182 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1183 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1184 clear_bit(NFS_OPEN_STATE, &state->flags); 1185 } 1186 if (stateid == NULL) 1187 return; 1188 if (!nfs_need_update_open_stateid(state, stateid)) 1189 return; 1190 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1191 nfs4_stateid_copy(&state->stateid, stateid); 1192 nfs4_stateid_copy(&state->open_stateid, stateid); 1193 } 1194 1195 static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) 1196 { 1197 write_seqlock(&state->seqlock); 1198 nfs_clear_open_stateid_locked(state, stateid, fmode); 1199 write_sequnlock(&state->seqlock); 1200 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1201 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1202 } 1203 1204 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode) 1205 { 1206 switch (fmode) { 1207 case FMODE_READ: 1208 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1209 break; 1210 case FMODE_WRITE: 1211 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1212 break; 1213 case FMODE_READ|FMODE_WRITE: 1214 set_bit(NFS_O_RDWR_STATE, &state->flags); 1215 } 1216 if (!nfs_need_update_open_stateid(state, stateid)) 1217 return; 1218 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1219 nfs4_stateid_copy(&state->stateid, stateid); 1220 nfs4_stateid_copy(&state->open_stateid, stateid); 1221 } 1222 1223 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode) 1224 { 1225 /* 1226 * Protect the call to nfs4_state_set_mode_locked and 1227 * serialise the stateid update 1228 */ 1229 write_seqlock(&state->seqlock); 1230 if (deleg_stateid != NULL) { 1231 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1232 set_bit(NFS_DELEGATED_STATE, &state->flags); 1233 } 1234 if (open_stateid != NULL) 1235 nfs_set_open_stateid_locked(state, open_stateid, fmode); 1236 write_sequnlock(&state->seqlock); 1237 spin_lock(&state->owner->so_lock); 1238 update_open_stateflags(state, fmode); 1239 spin_unlock(&state->owner->so_lock); 1240 } 1241 1242 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode) 1243 { 1244 struct nfs_inode *nfsi = NFS_I(state->inode); 1245 struct nfs_delegation *deleg_cur; 1246 int ret = 0; 1247 1248 fmode &= (FMODE_READ|FMODE_WRITE); 1249 1250 rcu_read_lock(); 1251 deleg_cur = rcu_dereference(nfsi->delegation); 1252 if (deleg_cur == NULL) 1253 goto no_delegation; 1254 1255 spin_lock(&deleg_cur->lock); 1256 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1257 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1258 (deleg_cur->type & fmode) != fmode) 1259 goto no_delegation_unlock; 1260 1261 if (delegation == NULL) 1262 delegation = &deleg_cur->stateid; 1263 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation)) 1264 goto no_delegation_unlock; 1265 1266 nfs_mark_delegation_referenced(deleg_cur); 1267 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode); 1268 ret = 1; 1269 no_delegation_unlock: 1270 spin_unlock(&deleg_cur->lock); 1271 no_delegation: 1272 rcu_read_unlock(); 1273 1274 if (!ret && open_stateid != NULL) { 1275 __update_open_stateid(state, open_stateid, NULL, fmode); 1276 ret = 1; 1277 } 1278 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1279 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1280 1281 return ret; 1282 } 1283 1284 1285 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1286 { 1287 struct nfs_delegation *delegation; 1288 1289 rcu_read_lock(); 1290 delegation = rcu_dereference(NFS_I(inode)->delegation); 1291 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1292 rcu_read_unlock(); 1293 return; 1294 } 1295 rcu_read_unlock(); 1296 nfs4_inode_return_delegation(inode); 1297 } 1298 1299 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1300 { 1301 struct nfs4_state *state = opendata->state; 1302 struct nfs_inode *nfsi = NFS_I(state->inode); 1303 struct nfs_delegation *delegation; 1304 int open_mode = opendata->o_arg.open_flags; 1305 fmode_t fmode = opendata->o_arg.fmode; 1306 nfs4_stateid stateid; 1307 int ret = -EAGAIN; 1308 1309 for (;;) { 1310 if (can_open_cached(state, fmode, open_mode)) { 1311 spin_lock(&state->owner->so_lock); 1312 if (can_open_cached(state, fmode, open_mode)) { 1313 update_open_stateflags(state, fmode); 1314 spin_unlock(&state->owner->so_lock); 1315 goto out_return_state; 1316 } 1317 spin_unlock(&state->owner->so_lock); 1318 } 1319 rcu_read_lock(); 1320 delegation = rcu_dereference(nfsi->delegation); 1321 if (!can_open_delegated(delegation, fmode)) { 1322 rcu_read_unlock(); 1323 break; 1324 } 1325 /* Save the delegation */ 1326 nfs4_stateid_copy(&stateid, &delegation->stateid); 1327 rcu_read_unlock(); 1328 nfs_release_seqid(opendata->o_arg.seqid); 1329 if (!opendata->is_recover) { 1330 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1331 if (ret != 0) 1332 goto out; 1333 } 1334 ret = -EAGAIN; 1335 1336 /* Try to update the stateid using the delegation */ 1337 if (update_open_stateid(state, NULL, &stateid, fmode)) 1338 goto out_return_state; 1339 } 1340 out: 1341 return ERR_PTR(ret); 1342 out_return_state: 1343 atomic_inc(&state->count); 1344 return state; 1345 } 1346 1347 static void 1348 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1349 { 1350 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1351 struct nfs_delegation *delegation; 1352 int delegation_flags = 0; 1353 1354 rcu_read_lock(); 1355 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1356 if (delegation) 1357 delegation_flags = delegation->flags; 1358 rcu_read_unlock(); 1359 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) { 1360 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1361 "returning a delegation for " 1362 "OPEN(CLAIM_DELEGATE_CUR)\n", 1363 clp->cl_hostname); 1364 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1365 nfs_inode_set_delegation(state->inode, 1366 data->owner->so_cred, 1367 &data->o_res); 1368 else 1369 nfs_inode_reclaim_delegation(state->inode, 1370 data->owner->so_cred, 1371 &data->o_res); 1372 } 1373 1374 /* 1375 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1376 * and update the nfs4_state. 1377 */ 1378 static struct nfs4_state * 1379 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1380 { 1381 struct inode *inode = data->state->inode; 1382 struct nfs4_state *state = data->state; 1383 int ret; 1384 1385 if (!data->rpc_done) { 1386 if (data->rpc_status) { 1387 ret = data->rpc_status; 1388 goto err; 1389 } 1390 /* cached opens have already been processed */ 1391 goto update; 1392 } 1393 1394 ret = nfs_refresh_inode(inode, &data->f_attr); 1395 if (ret) 1396 goto err; 1397 1398 if (data->o_res.delegation_type != 0) 1399 nfs4_opendata_check_deleg(data, state); 1400 update: 1401 update_open_stateid(state, &data->o_res.stateid, NULL, 1402 data->o_arg.fmode); 1403 atomic_inc(&state->count); 1404 1405 return state; 1406 err: 1407 return ERR_PTR(ret); 1408 1409 } 1410 1411 static struct nfs4_state * 1412 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1413 { 1414 struct inode *inode; 1415 struct nfs4_state *state = NULL; 1416 int ret; 1417 1418 if (!data->rpc_done) { 1419 state = nfs4_try_open_cached(data); 1420 goto out; 1421 } 1422 1423 ret = -EAGAIN; 1424 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 1425 goto err; 1426 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label); 1427 ret = PTR_ERR(inode); 1428 if (IS_ERR(inode)) 1429 goto err; 1430 ret = -ENOMEM; 1431 state = nfs4_get_open_state(inode, data->owner); 1432 if (state == NULL) 1433 goto err_put_inode; 1434 if (data->o_res.delegation_type != 0) 1435 nfs4_opendata_check_deleg(data, state); 1436 update_open_stateid(state, &data->o_res.stateid, NULL, 1437 data->o_arg.fmode); 1438 iput(inode); 1439 out: 1440 nfs_release_seqid(data->o_arg.seqid); 1441 return state; 1442 err_put_inode: 1443 iput(inode); 1444 err: 1445 return ERR_PTR(ret); 1446 } 1447 1448 static struct nfs4_state * 1449 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1450 { 1451 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 1452 return _nfs4_opendata_reclaim_to_nfs4_state(data); 1453 return _nfs4_opendata_to_nfs4_state(data); 1454 } 1455 1456 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) 1457 { 1458 struct nfs_inode *nfsi = NFS_I(state->inode); 1459 struct nfs_open_context *ctx; 1460 1461 spin_lock(&state->inode->i_lock); 1462 list_for_each_entry(ctx, &nfsi->open_files, list) { 1463 if (ctx->state != state) 1464 continue; 1465 get_nfs_open_context(ctx); 1466 spin_unlock(&state->inode->i_lock); 1467 return ctx; 1468 } 1469 spin_unlock(&state->inode->i_lock); 1470 return ERR_PTR(-ENOENT); 1471 } 1472 1473 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 1474 struct nfs4_state *state, enum open_claim_type4 claim) 1475 { 1476 struct nfs4_opendata *opendata; 1477 1478 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 1479 NULL, NULL, claim, GFP_NOFS); 1480 if (opendata == NULL) 1481 return ERR_PTR(-ENOMEM); 1482 opendata->state = state; 1483 atomic_inc(&state->count); 1484 return opendata; 1485 } 1486 1487 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res) 1488 { 1489 struct nfs4_state *newstate; 1490 int ret; 1491 1492 opendata->o_arg.open_flags = 0; 1493 opendata->o_arg.fmode = fmode; 1494 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 1495 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 1496 nfs4_init_opendata_res(opendata); 1497 ret = _nfs4_recover_proc_open(opendata); 1498 if (ret != 0) 1499 return ret; 1500 newstate = nfs4_opendata_to_nfs4_state(opendata); 1501 if (IS_ERR(newstate)) 1502 return PTR_ERR(newstate); 1503 nfs4_close_state(newstate, fmode); 1504 *res = newstate; 1505 return 0; 1506 } 1507 1508 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 1509 { 1510 struct nfs4_state *newstate; 1511 int ret; 1512 1513 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */ 1514 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1515 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1516 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1517 /* memory barrier prior to reading state->n_* */ 1518 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1519 clear_bit(NFS_OPEN_STATE, &state->flags); 1520 smp_rmb(); 1521 if (state->n_rdwr != 0) { 1522 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate); 1523 if (ret != 0) 1524 return ret; 1525 if (newstate != state) 1526 return -ESTALE; 1527 } 1528 if (state->n_wronly != 0) { 1529 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate); 1530 if (ret != 0) 1531 return ret; 1532 if (newstate != state) 1533 return -ESTALE; 1534 } 1535 if (state->n_rdonly != 0) { 1536 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate); 1537 if (ret != 0) 1538 return ret; 1539 if (newstate != state) 1540 return -ESTALE; 1541 } 1542 /* 1543 * We may have performed cached opens for all three recoveries. 1544 * Check if we need to update the current stateid. 1545 */ 1546 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 1547 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 1548 write_seqlock(&state->seqlock); 1549 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1550 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1551 write_sequnlock(&state->seqlock); 1552 } 1553 return 0; 1554 } 1555 1556 /* 1557 * OPEN_RECLAIM: 1558 * reclaim state on the server after a reboot. 1559 */ 1560 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 1561 { 1562 struct nfs_delegation *delegation; 1563 struct nfs4_opendata *opendata; 1564 fmode_t delegation_type = 0; 1565 int status; 1566 1567 opendata = nfs4_open_recoverdata_alloc(ctx, state, 1568 NFS4_OPEN_CLAIM_PREVIOUS); 1569 if (IS_ERR(opendata)) 1570 return PTR_ERR(opendata); 1571 rcu_read_lock(); 1572 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1573 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 1574 delegation_type = delegation->type; 1575 rcu_read_unlock(); 1576 opendata->o_arg.u.delegation_type = delegation_type; 1577 status = nfs4_open_recover(opendata, state); 1578 nfs4_opendata_put(opendata); 1579 return status; 1580 } 1581 1582 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 1583 { 1584 struct nfs_server *server = NFS_SERVER(state->inode); 1585 struct nfs4_exception exception = { }; 1586 int err; 1587 do { 1588 err = _nfs4_do_open_reclaim(ctx, state); 1589 trace_nfs4_open_reclaim(ctx, 0, err); 1590 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 1591 continue; 1592 if (err != -NFS4ERR_DELAY) 1593 break; 1594 nfs4_handle_exception(server, err, &exception); 1595 } while (exception.retry); 1596 return err; 1597 } 1598 1599 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 1600 { 1601 struct nfs_open_context *ctx; 1602 int ret; 1603 1604 ctx = nfs4_state_find_open_context(state); 1605 if (IS_ERR(ctx)) 1606 return -EAGAIN; 1607 ret = nfs4_do_open_reclaim(ctx, state); 1608 put_nfs_open_context(ctx); 1609 return ret; 1610 } 1611 1612 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err) 1613 { 1614 switch (err) { 1615 default: 1616 printk(KERN_ERR "NFS: %s: unhandled error " 1617 "%d.\n", __func__, err); 1618 case 0: 1619 case -ENOENT: 1620 case -ESTALE: 1621 break; 1622 case -NFS4ERR_BADSESSION: 1623 case -NFS4ERR_BADSLOT: 1624 case -NFS4ERR_BAD_HIGH_SLOT: 1625 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 1626 case -NFS4ERR_DEADSESSION: 1627 set_bit(NFS_DELEGATED_STATE, &state->flags); 1628 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); 1629 return -EAGAIN; 1630 case -NFS4ERR_STALE_CLIENTID: 1631 case -NFS4ERR_STALE_STATEID: 1632 set_bit(NFS_DELEGATED_STATE, &state->flags); 1633 case -NFS4ERR_EXPIRED: 1634 /* Don't recall a delegation if it was lost */ 1635 nfs4_schedule_lease_recovery(server->nfs_client); 1636 return -EAGAIN; 1637 case -NFS4ERR_MOVED: 1638 nfs4_schedule_migration_recovery(server); 1639 return -EAGAIN; 1640 case -NFS4ERR_LEASE_MOVED: 1641 nfs4_schedule_lease_moved_recovery(server->nfs_client); 1642 return -EAGAIN; 1643 case -NFS4ERR_DELEG_REVOKED: 1644 case -NFS4ERR_ADMIN_REVOKED: 1645 case -NFS4ERR_BAD_STATEID: 1646 case -NFS4ERR_OPENMODE: 1647 nfs_inode_find_state_and_recover(state->inode, 1648 stateid); 1649 nfs4_schedule_stateid_recovery(server, state); 1650 return 0; 1651 case -NFS4ERR_DELAY: 1652 case -NFS4ERR_GRACE: 1653 set_bit(NFS_DELEGATED_STATE, &state->flags); 1654 ssleep(1); 1655 return -EAGAIN; 1656 case -ENOMEM: 1657 case -NFS4ERR_DENIED: 1658 /* kill_proc(fl->fl_pid, SIGLOST, 1); */ 1659 return 0; 1660 } 1661 return err; 1662 } 1663 1664 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid) 1665 { 1666 struct nfs_server *server = NFS_SERVER(state->inode); 1667 struct nfs4_opendata *opendata; 1668 int err; 1669 1670 opendata = nfs4_open_recoverdata_alloc(ctx, state, 1671 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 1672 if (IS_ERR(opendata)) 1673 return PTR_ERR(opendata); 1674 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 1675 err = nfs4_open_recover(opendata, state); 1676 nfs4_opendata_put(opendata); 1677 return nfs4_handle_delegation_recall_error(server, state, stateid, err); 1678 } 1679 1680 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 1681 { 1682 struct nfs4_opendata *data = calldata; 1683 1684 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args, 1685 &data->c_res.seq_res, task); 1686 } 1687 1688 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 1689 { 1690 struct nfs4_opendata *data = calldata; 1691 1692 nfs40_sequence_done(task, &data->c_res.seq_res); 1693 1694 data->rpc_status = task->tk_status; 1695 if (data->rpc_status == 0) { 1696 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 1697 nfs_confirm_seqid(&data->owner->so_seqid, 0); 1698 renew_lease(data->o_res.server, data->timestamp); 1699 data->rpc_done = 1; 1700 } 1701 } 1702 1703 static void nfs4_open_confirm_release(void *calldata) 1704 { 1705 struct nfs4_opendata *data = calldata; 1706 struct nfs4_state *state = NULL; 1707 1708 /* If this request hasn't been cancelled, do nothing */ 1709 if (data->cancelled == 0) 1710 goto out_free; 1711 /* In case of error, no cleanup! */ 1712 if (!data->rpc_done) 1713 goto out_free; 1714 state = nfs4_opendata_to_nfs4_state(data); 1715 if (!IS_ERR(state)) 1716 nfs4_close_state(state, data->o_arg.fmode); 1717 out_free: 1718 nfs4_opendata_put(data); 1719 } 1720 1721 static const struct rpc_call_ops nfs4_open_confirm_ops = { 1722 .rpc_call_prepare = nfs4_open_confirm_prepare, 1723 .rpc_call_done = nfs4_open_confirm_done, 1724 .rpc_release = nfs4_open_confirm_release, 1725 }; 1726 1727 /* 1728 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 1729 */ 1730 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 1731 { 1732 struct nfs_server *server = NFS_SERVER(data->dir->d_inode); 1733 struct rpc_task *task; 1734 struct rpc_message msg = { 1735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 1736 .rpc_argp = &data->c_arg, 1737 .rpc_resp = &data->c_res, 1738 .rpc_cred = data->owner->so_cred, 1739 }; 1740 struct rpc_task_setup task_setup_data = { 1741 .rpc_client = server->client, 1742 .rpc_message = &msg, 1743 .callback_ops = &nfs4_open_confirm_ops, 1744 .callback_data = data, 1745 .workqueue = nfsiod_workqueue, 1746 .flags = RPC_TASK_ASYNC, 1747 }; 1748 int status; 1749 1750 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1); 1751 kref_get(&data->kref); 1752 data->rpc_done = 0; 1753 data->rpc_status = 0; 1754 data->timestamp = jiffies; 1755 task = rpc_run_task(&task_setup_data); 1756 if (IS_ERR(task)) 1757 return PTR_ERR(task); 1758 status = nfs4_wait_for_completion_rpc_task(task); 1759 if (status != 0) { 1760 data->cancelled = 1; 1761 smp_wmb(); 1762 } else 1763 status = data->rpc_status; 1764 rpc_put_task(task); 1765 return status; 1766 } 1767 1768 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 1769 { 1770 struct nfs4_opendata *data = calldata; 1771 struct nfs4_state_owner *sp = data->owner; 1772 struct nfs_client *clp = sp->so_server->nfs_client; 1773 1774 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 1775 goto out_wait; 1776 /* 1777 * Check if we still need to send an OPEN call, or if we can use 1778 * a delegation instead. 1779 */ 1780 if (data->state != NULL) { 1781 struct nfs_delegation *delegation; 1782 1783 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) 1784 goto out_no_action; 1785 rcu_read_lock(); 1786 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); 1787 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR && 1788 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH && 1789 can_open_delegated(delegation, data->o_arg.fmode)) 1790 goto unlock_no_action; 1791 rcu_read_unlock(); 1792 } 1793 /* Update client id. */ 1794 data->o_arg.clientid = clp->cl_clientid; 1795 switch (data->o_arg.claim) { 1796 case NFS4_OPEN_CLAIM_PREVIOUS: 1797 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1798 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1799 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 1800 case NFS4_OPEN_CLAIM_FH: 1801 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 1802 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); 1803 } 1804 data->timestamp = jiffies; 1805 if (nfs4_setup_sequence(data->o_arg.server, 1806 &data->o_arg.seq_args, 1807 &data->o_res.seq_res, 1808 task) != 0) 1809 nfs_release_seqid(data->o_arg.seqid); 1810 1811 /* Set the create mode (note dependency on the session type) */ 1812 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 1813 if (data->o_arg.open_flags & O_EXCL) { 1814 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 1815 if (nfs4_has_persistent_session(clp)) 1816 data->o_arg.createmode = NFS4_CREATE_GUARDED; 1817 else if (clp->cl_mvops->minor_version > 0) 1818 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 1819 } 1820 return; 1821 unlock_no_action: 1822 rcu_read_unlock(); 1823 out_no_action: 1824 task->tk_action = NULL; 1825 out_wait: 1826 nfs4_sequence_done(task, &data->o_res.seq_res); 1827 } 1828 1829 static void nfs4_open_done(struct rpc_task *task, void *calldata) 1830 { 1831 struct nfs4_opendata *data = calldata; 1832 1833 data->rpc_status = task->tk_status; 1834 1835 if (!nfs4_sequence_done(task, &data->o_res.seq_res)) 1836 return; 1837 1838 if (task->tk_status == 0) { 1839 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 1840 switch (data->o_res.f_attr->mode & S_IFMT) { 1841 case S_IFREG: 1842 break; 1843 case S_IFLNK: 1844 data->rpc_status = -ELOOP; 1845 break; 1846 case S_IFDIR: 1847 data->rpc_status = -EISDIR; 1848 break; 1849 default: 1850 data->rpc_status = -ENOTDIR; 1851 } 1852 } 1853 renew_lease(data->o_res.server, data->timestamp); 1854 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 1855 nfs_confirm_seqid(&data->owner->so_seqid, 0); 1856 } 1857 data->rpc_done = 1; 1858 } 1859 1860 static void nfs4_open_release(void *calldata) 1861 { 1862 struct nfs4_opendata *data = calldata; 1863 struct nfs4_state *state = NULL; 1864 1865 /* If this request hasn't been cancelled, do nothing */ 1866 if (data->cancelled == 0) 1867 goto out_free; 1868 /* In case of error, no cleanup! */ 1869 if (data->rpc_status != 0 || !data->rpc_done) 1870 goto out_free; 1871 /* In case we need an open_confirm, no cleanup! */ 1872 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 1873 goto out_free; 1874 state = nfs4_opendata_to_nfs4_state(data); 1875 if (!IS_ERR(state)) 1876 nfs4_close_state(state, data->o_arg.fmode); 1877 out_free: 1878 nfs4_opendata_put(data); 1879 } 1880 1881 static const struct rpc_call_ops nfs4_open_ops = { 1882 .rpc_call_prepare = nfs4_open_prepare, 1883 .rpc_call_done = nfs4_open_done, 1884 .rpc_release = nfs4_open_release, 1885 }; 1886 1887 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) 1888 { 1889 struct inode *dir = data->dir->d_inode; 1890 struct nfs_server *server = NFS_SERVER(dir); 1891 struct nfs_openargs *o_arg = &data->o_arg; 1892 struct nfs_openres *o_res = &data->o_res; 1893 struct rpc_task *task; 1894 struct rpc_message msg = { 1895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 1896 .rpc_argp = o_arg, 1897 .rpc_resp = o_res, 1898 .rpc_cred = data->owner->so_cred, 1899 }; 1900 struct rpc_task_setup task_setup_data = { 1901 .rpc_client = server->client, 1902 .rpc_message = &msg, 1903 .callback_ops = &nfs4_open_ops, 1904 .callback_data = data, 1905 .workqueue = nfsiod_workqueue, 1906 .flags = RPC_TASK_ASYNC, 1907 }; 1908 int status; 1909 1910 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1); 1911 kref_get(&data->kref); 1912 data->rpc_done = 0; 1913 data->rpc_status = 0; 1914 data->cancelled = 0; 1915 data->is_recover = 0; 1916 if (isrecover) { 1917 nfs4_set_sequence_privileged(&o_arg->seq_args); 1918 data->is_recover = 1; 1919 } 1920 task = rpc_run_task(&task_setup_data); 1921 if (IS_ERR(task)) 1922 return PTR_ERR(task); 1923 status = nfs4_wait_for_completion_rpc_task(task); 1924 if (status != 0) { 1925 data->cancelled = 1; 1926 smp_wmb(); 1927 } else 1928 status = data->rpc_status; 1929 rpc_put_task(task); 1930 1931 return status; 1932 } 1933 1934 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 1935 { 1936 struct inode *dir = data->dir->d_inode; 1937 struct nfs_openres *o_res = &data->o_res; 1938 int status; 1939 1940 status = nfs4_run_open_task(data, 1); 1941 if (status != 0 || !data->rpc_done) 1942 return status; 1943 1944 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 1945 1946 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 1947 status = _nfs4_proc_open_confirm(data); 1948 if (status != 0) 1949 return status; 1950 } 1951 1952 return status; 1953 } 1954 1955 static int nfs4_opendata_access(struct rpc_cred *cred, 1956 struct nfs4_opendata *opendata, 1957 struct nfs4_state *state, fmode_t fmode, 1958 int openflags) 1959 { 1960 struct nfs_access_entry cache; 1961 u32 mask; 1962 1963 /* access call failed or for some reason the server doesn't 1964 * support any access modes -- defer access call until later */ 1965 if (opendata->o_res.access_supported == 0) 1966 return 0; 1967 1968 mask = 0; 1969 /* don't check MAY_WRITE - a newly created file may not have 1970 * write mode bits, but POSIX allows the creating process to write. 1971 * use openflags to check for exec, because fmode won't 1972 * always have FMODE_EXEC set when file open for exec. */ 1973 if (openflags & __FMODE_EXEC) { 1974 /* ONLY check for exec rights */ 1975 mask = MAY_EXEC; 1976 } else if (fmode & FMODE_READ) 1977 mask = MAY_READ; 1978 1979 cache.cred = cred; 1980 cache.jiffies = jiffies; 1981 nfs_access_set_mask(&cache, opendata->o_res.access_result); 1982 nfs_access_add_cache(state->inode, &cache); 1983 1984 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0) 1985 return 0; 1986 1987 /* even though OPEN succeeded, access is denied. Close the file */ 1988 nfs4_close_state(state, fmode); 1989 return -EACCES; 1990 } 1991 1992 /* 1993 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 1994 */ 1995 static int _nfs4_proc_open(struct nfs4_opendata *data) 1996 { 1997 struct inode *dir = data->dir->d_inode; 1998 struct nfs_server *server = NFS_SERVER(dir); 1999 struct nfs_openargs *o_arg = &data->o_arg; 2000 struct nfs_openres *o_res = &data->o_res; 2001 int status; 2002 2003 status = nfs4_run_open_task(data, 0); 2004 if (!data->rpc_done) 2005 return status; 2006 if (status != 0) { 2007 if (status == -NFS4ERR_BADNAME && 2008 !(o_arg->open_flags & O_CREAT)) 2009 return -ENOENT; 2010 return status; 2011 } 2012 2013 nfs_fattr_map_and_free_names(server, &data->f_attr); 2014 2015 if (o_arg->open_flags & O_CREAT) { 2016 update_changeattr(dir, &o_res->cinfo); 2017 if (o_arg->open_flags & O_EXCL) 2018 data->file_created = 1; 2019 else if (o_res->cinfo.before != o_res->cinfo.after) 2020 data->file_created = 1; 2021 } 2022 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2023 server->caps &= ~NFS_CAP_POSIX_LOCK; 2024 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2025 status = _nfs4_proc_open_confirm(data); 2026 if (status != 0) 2027 return status; 2028 } 2029 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) 2030 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label); 2031 return 0; 2032 } 2033 2034 static int nfs4_recover_expired_lease(struct nfs_server *server) 2035 { 2036 return nfs4_client_recover_expired_lease(server->nfs_client); 2037 } 2038 2039 /* 2040 * OPEN_EXPIRED: 2041 * reclaim state on the server after a network partition. 2042 * Assumes caller holds the appropriate lock 2043 */ 2044 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2045 { 2046 struct nfs4_opendata *opendata; 2047 int ret; 2048 2049 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2050 NFS4_OPEN_CLAIM_FH); 2051 if (IS_ERR(opendata)) 2052 return PTR_ERR(opendata); 2053 ret = nfs4_open_recover(opendata, state); 2054 if (ret == -ESTALE) 2055 d_drop(ctx->dentry); 2056 nfs4_opendata_put(opendata); 2057 return ret; 2058 } 2059 2060 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2061 { 2062 struct nfs_server *server = NFS_SERVER(state->inode); 2063 struct nfs4_exception exception = { }; 2064 int err; 2065 2066 do { 2067 err = _nfs4_open_expired(ctx, state); 2068 trace_nfs4_open_expired(ctx, 0, err); 2069 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2070 continue; 2071 switch (err) { 2072 default: 2073 goto out; 2074 case -NFS4ERR_GRACE: 2075 case -NFS4ERR_DELAY: 2076 nfs4_handle_exception(server, err, &exception); 2077 err = 0; 2078 } 2079 } while (exception.retry); 2080 out: 2081 return err; 2082 } 2083 2084 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2085 { 2086 struct nfs_open_context *ctx; 2087 int ret; 2088 2089 ctx = nfs4_state_find_open_context(state); 2090 if (IS_ERR(ctx)) 2091 return -EAGAIN; 2092 ret = nfs4_do_open_expired(ctx, state); 2093 put_nfs_open_context(ctx); 2094 return ret; 2095 } 2096 2097 #if defined(CONFIG_NFS_V4_1) 2098 static void nfs41_clear_delegation_stateid(struct nfs4_state *state) 2099 { 2100 struct nfs_server *server = NFS_SERVER(state->inode); 2101 nfs4_stateid *stateid = &state->stateid; 2102 struct nfs_delegation *delegation; 2103 struct rpc_cred *cred = NULL; 2104 int status = -NFS4ERR_BAD_STATEID; 2105 2106 /* If a state reset has been done, test_stateid is unneeded */ 2107 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 2108 return; 2109 2110 /* Get the delegation credential for use by test/free_stateid */ 2111 rcu_read_lock(); 2112 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2113 if (delegation != NULL && 2114 nfs4_stateid_match(&delegation->stateid, stateid)) { 2115 cred = get_rpccred(delegation->cred); 2116 rcu_read_unlock(); 2117 status = nfs41_test_stateid(server, stateid, cred); 2118 trace_nfs4_test_delegation_stateid(state, NULL, status); 2119 } else 2120 rcu_read_unlock(); 2121 2122 if (status != NFS_OK) { 2123 /* Free the stateid unless the server explicitly 2124 * informs us the stateid is unrecognized. */ 2125 if (status != -NFS4ERR_BAD_STATEID) 2126 nfs41_free_stateid(server, stateid, cred); 2127 nfs_remove_bad_delegation(state->inode); 2128 2129 write_seqlock(&state->seqlock); 2130 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2131 write_sequnlock(&state->seqlock); 2132 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2133 } 2134 2135 if (cred != NULL) 2136 put_rpccred(cred); 2137 } 2138 2139 /** 2140 * nfs41_check_open_stateid - possibly free an open stateid 2141 * 2142 * @state: NFSv4 state for an inode 2143 * 2144 * Returns NFS_OK if recovery for this stateid is now finished. 2145 * Otherwise a negative NFS4ERR value is returned. 2146 */ 2147 static int nfs41_check_open_stateid(struct nfs4_state *state) 2148 { 2149 struct nfs_server *server = NFS_SERVER(state->inode); 2150 nfs4_stateid *stateid = &state->open_stateid; 2151 struct rpc_cred *cred = state->owner->so_cred; 2152 int status; 2153 2154 /* If a state reset has been done, test_stateid is unneeded */ 2155 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) && 2156 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) && 2157 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0)) 2158 return -NFS4ERR_BAD_STATEID; 2159 2160 status = nfs41_test_stateid(server, stateid, cred); 2161 trace_nfs4_test_open_stateid(state, NULL, status); 2162 if (status != NFS_OK) { 2163 /* Free the stateid unless the server explicitly 2164 * informs us the stateid is unrecognized. */ 2165 if (status != -NFS4ERR_BAD_STATEID) 2166 nfs41_free_stateid(server, stateid, cred); 2167 2168 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 2169 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 2170 clear_bit(NFS_O_RDWR_STATE, &state->flags); 2171 clear_bit(NFS_OPEN_STATE, &state->flags); 2172 } 2173 return status; 2174 } 2175 2176 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2177 { 2178 int status; 2179 2180 nfs41_clear_delegation_stateid(state); 2181 status = nfs41_check_open_stateid(state); 2182 if (status != NFS_OK) 2183 status = nfs4_open_expired(sp, state); 2184 return status; 2185 } 2186 #endif 2187 2188 /* 2189 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2190 * fields corresponding to attributes that were used to store the verifier. 2191 * Make sure we clobber those fields in the later setattr call 2192 */ 2193 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr) 2194 { 2195 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) && 2196 !(sattr->ia_valid & ATTR_ATIME_SET)) 2197 sattr->ia_valid |= ATTR_ATIME; 2198 2199 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) && 2200 !(sattr->ia_valid & ATTR_MTIME_SET)) 2201 sattr->ia_valid |= ATTR_MTIME; 2202 } 2203 2204 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 2205 fmode_t fmode, 2206 int flags, 2207 struct nfs_open_context *ctx) 2208 { 2209 struct nfs4_state_owner *sp = opendata->owner; 2210 struct nfs_server *server = sp->so_server; 2211 struct dentry *dentry; 2212 struct nfs4_state *state; 2213 unsigned int seq; 2214 int ret; 2215 2216 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 2217 2218 ret = _nfs4_proc_open(opendata); 2219 if (ret != 0) 2220 goto out; 2221 2222 state = nfs4_opendata_to_nfs4_state(opendata); 2223 ret = PTR_ERR(state); 2224 if (IS_ERR(state)) 2225 goto out; 2226 if (server->caps & NFS_CAP_POSIX_LOCK) 2227 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 2228 2229 dentry = opendata->dentry; 2230 if (dentry->d_inode == NULL) { 2231 /* FIXME: Is this d_drop() ever needed? */ 2232 d_drop(dentry); 2233 dentry = d_add_unique(dentry, igrab(state->inode)); 2234 if (dentry == NULL) { 2235 dentry = opendata->dentry; 2236 } else if (dentry != ctx->dentry) { 2237 dput(ctx->dentry); 2238 ctx->dentry = dget(dentry); 2239 } 2240 nfs_set_verifier(dentry, 2241 nfs_save_change_attribute(opendata->dir->d_inode)); 2242 } 2243 2244 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags); 2245 if (ret != 0) 2246 goto out; 2247 2248 ctx->state = state; 2249 if (dentry->d_inode == state->inode) { 2250 nfs_inode_attach_open_context(ctx); 2251 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 2252 nfs4_schedule_stateid_recovery(server, state); 2253 } 2254 out: 2255 return ret; 2256 } 2257 2258 /* 2259 * Returns a referenced nfs4_state 2260 */ 2261 static int _nfs4_do_open(struct inode *dir, 2262 struct nfs_open_context *ctx, 2263 int flags, 2264 struct iattr *sattr, 2265 struct nfs4_label *label, 2266 int *opened) 2267 { 2268 struct nfs4_state_owner *sp; 2269 struct nfs4_state *state = NULL; 2270 struct nfs_server *server = NFS_SERVER(dir); 2271 struct nfs4_opendata *opendata; 2272 struct dentry *dentry = ctx->dentry; 2273 struct rpc_cred *cred = ctx->cred; 2274 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 2275 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 2276 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 2277 struct nfs4_label *olabel = NULL; 2278 int status; 2279 2280 /* Protect against reboot recovery conflicts */ 2281 status = -ENOMEM; 2282 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 2283 if (sp == NULL) { 2284 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 2285 goto out_err; 2286 } 2287 status = nfs4_recover_expired_lease(server); 2288 if (status != 0) 2289 goto err_put_state_owner; 2290 if (dentry->d_inode != NULL) 2291 nfs4_return_incompatible_delegation(dentry->d_inode, fmode); 2292 status = -ENOMEM; 2293 if (dentry->d_inode) 2294 claim = NFS4_OPEN_CLAIM_FH; 2295 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, 2296 label, claim, GFP_KERNEL); 2297 if (opendata == NULL) 2298 goto err_put_state_owner; 2299 2300 if (label) { 2301 olabel = nfs4_label_alloc(server, GFP_KERNEL); 2302 if (IS_ERR(olabel)) { 2303 status = PTR_ERR(olabel); 2304 goto err_opendata_put; 2305 } 2306 } 2307 2308 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 2309 if (!opendata->f_attr.mdsthreshold) { 2310 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 2311 if (!opendata->f_attr.mdsthreshold) 2312 goto err_free_label; 2313 } 2314 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 2315 } 2316 if (dentry->d_inode != NULL) 2317 opendata->state = nfs4_get_open_state(dentry->d_inode, sp); 2318 2319 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx); 2320 if (status != 0) 2321 goto err_free_label; 2322 state = ctx->state; 2323 2324 if ((opendata->o_arg.open_flags & O_EXCL) && 2325 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 2326 nfs4_exclusive_attrset(opendata, sattr); 2327 2328 nfs_fattr_init(opendata->o_res.f_attr); 2329 status = nfs4_do_setattr(state->inode, cred, 2330 opendata->o_res.f_attr, sattr, 2331 state, label, olabel); 2332 if (status == 0) { 2333 nfs_setattr_update_inode(state->inode, sattr); 2334 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr); 2335 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); 2336 } 2337 } 2338 if (opendata->file_created) 2339 *opened |= FILE_CREATED; 2340 2341 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 2342 *ctx_th = opendata->f_attr.mdsthreshold; 2343 opendata->f_attr.mdsthreshold = NULL; 2344 } 2345 2346 nfs4_label_free(olabel); 2347 2348 nfs4_opendata_put(opendata); 2349 nfs4_put_state_owner(sp); 2350 return 0; 2351 err_free_label: 2352 nfs4_label_free(olabel); 2353 err_opendata_put: 2354 nfs4_opendata_put(opendata); 2355 err_put_state_owner: 2356 nfs4_put_state_owner(sp); 2357 out_err: 2358 return status; 2359 } 2360 2361 2362 static struct nfs4_state *nfs4_do_open(struct inode *dir, 2363 struct nfs_open_context *ctx, 2364 int flags, 2365 struct iattr *sattr, 2366 struct nfs4_label *label, 2367 int *opened) 2368 { 2369 struct nfs_server *server = NFS_SERVER(dir); 2370 struct nfs4_exception exception = { }; 2371 struct nfs4_state *res; 2372 int status; 2373 2374 do { 2375 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened); 2376 res = ctx->state; 2377 trace_nfs4_open_file(ctx, flags, status); 2378 if (status == 0) 2379 break; 2380 /* NOTE: BAD_SEQID means the server and client disagree about the 2381 * book-keeping w.r.t. state-changing operations 2382 * (OPEN/CLOSE/LOCK/LOCKU...) 2383 * It is actually a sign of a bug on the client or on the server. 2384 * 2385 * If we receive a BAD_SEQID error in the particular case of 2386 * doing an OPEN, we assume that nfs_increment_open_seqid() will 2387 * have unhashed the old state_owner for us, and that we can 2388 * therefore safely retry using a new one. We should still warn 2389 * the user though... 2390 */ 2391 if (status == -NFS4ERR_BAD_SEQID) { 2392 pr_warn_ratelimited("NFS: v4 server %s " 2393 " returned a bad sequence-id error!\n", 2394 NFS_SERVER(dir)->nfs_client->cl_hostname); 2395 exception.retry = 1; 2396 continue; 2397 } 2398 /* 2399 * BAD_STATEID on OPEN means that the server cancelled our 2400 * state before it received the OPEN_CONFIRM. 2401 * Recover by retrying the request as per the discussion 2402 * on Page 181 of RFC3530. 2403 */ 2404 if (status == -NFS4ERR_BAD_STATEID) { 2405 exception.retry = 1; 2406 continue; 2407 } 2408 if (status == -EAGAIN) { 2409 /* We must have found a delegation */ 2410 exception.retry = 1; 2411 continue; 2412 } 2413 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 2414 continue; 2415 res = ERR_PTR(nfs4_handle_exception(server, 2416 status, &exception)); 2417 } while (exception.retry); 2418 return res; 2419 } 2420 2421 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 2422 struct nfs_fattr *fattr, struct iattr *sattr, 2423 struct nfs4_state *state, struct nfs4_label *ilabel, 2424 struct nfs4_label *olabel) 2425 { 2426 struct nfs_server *server = NFS_SERVER(inode); 2427 struct nfs_setattrargs arg = { 2428 .fh = NFS_FH(inode), 2429 .iap = sattr, 2430 .server = server, 2431 .bitmask = server->attr_bitmask, 2432 .label = ilabel, 2433 }; 2434 struct nfs_setattrres res = { 2435 .fattr = fattr, 2436 .label = olabel, 2437 .server = server, 2438 }; 2439 struct rpc_message msg = { 2440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 2441 .rpc_argp = &arg, 2442 .rpc_resp = &res, 2443 .rpc_cred = cred, 2444 }; 2445 unsigned long timestamp = jiffies; 2446 fmode_t fmode; 2447 bool truncate; 2448 int status; 2449 2450 arg.bitmask = nfs4_bitmask(server, ilabel); 2451 if (ilabel) 2452 arg.bitmask = nfs4_bitmask(server, olabel); 2453 2454 nfs_fattr_init(fattr); 2455 2456 /* Servers should only apply open mode checks for file size changes */ 2457 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false; 2458 fmode = truncate ? FMODE_WRITE : FMODE_READ; 2459 2460 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) { 2461 /* Use that stateid */ 2462 } else if (truncate && state != NULL) { 2463 struct nfs_lockowner lockowner = { 2464 .l_owner = current->files, 2465 .l_pid = current->tgid, 2466 }; 2467 if (!nfs4_valid_open_stateid(state)) 2468 return -EBADF; 2469 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE, 2470 &lockowner) == -EIO) 2471 return -EBADF; 2472 } else 2473 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 2474 2475 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 2476 if (status == 0 && state != NULL) 2477 renew_lease(server, timestamp); 2478 return status; 2479 } 2480 2481 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 2482 struct nfs_fattr *fattr, struct iattr *sattr, 2483 struct nfs4_state *state, struct nfs4_label *ilabel, 2484 struct nfs4_label *olabel) 2485 { 2486 struct nfs_server *server = NFS_SERVER(inode); 2487 struct nfs4_exception exception = { 2488 .state = state, 2489 .inode = inode, 2490 }; 2491 int err; 2492 do { 2493 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel); 2494 trace_nfs4_setattr(inode, err); 2495 switch (err) { 2496 case -NFS4ERR_OPENMODE: 2497 if (!(sattr->ia_valid & ATTR_SIZE)) { 2498 pr_warn_once("NFSv4: server %s is incorrectly " 2499 "applying open mode checks to " 2500 "a SETATTR that is not " 2501 "changing file size.\n", 2502 server->nfs_client->cl_hostname); 2503 } 2504 if (state && !(state->state & FMODE_WRITE)) { 2505 err = -EBADF; 2506 if (sattr->ia_valid & ATTR_OPEN) 2507 err = -EACCES; 2508 goto out; 2509 } 2510 } 2511 err = nfs4_handle_exception(server, err, &exception); 2512 } while (exception.retry); 2513 out: 2514 return err; 2515 } 2516 2517 struct nfs4_closedata { 2518 struct inode *inode; 2519 struct nfs4_state *state; 2520 struct nfs_closeargs arg; 2521 struct nfs_closeres res; 2522 struct nfs_fattr fattr; 2523 unsigned long timestamp; 2524 bool roc; 2525 u32 roc_barrier; 2526 }; 2527 2528 static void nfs4_free_closedata(void *data) 2529 { 2530 struct nfs4_closedata *calldata = data; 2531 struct nfs4_state_owner *sp = calldata->state->owner; 2532 struct super_block *sb = calldata->state->inode->i_sb; 2533 2534 if (calldata->roc) 2535 pnfs_roc_release(calldata->state->inode); 2536 nfs4_put_open_state(calldata->state); 2537 nfs_free_seqid(calldata->arg.seqid); 2538 nfs4_put_state_owner(sp); 2539 nfs_sb_deactive(sb); 2540 kfree(calldata); 2541 } 2542 2543 static void nfs4_close_done(struct rpc_task *task, void *data) 2544 { 2545 struct nfs4_closedata *calldata = data; 2546 struct nfs4_state *state = calldata->state; 2547 struct nfs_server *server = NFS_SERVER(calldata->inode); 2548 2549 dprintk("%s: begin!\n", __func__); 2550 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 2551 return; 2552 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 2553 /* hmm. we are done with the inode, and in the process of freeing 2554 * the state_owner. we keep this around to process errors 2555 */ 2556 switch (task->tk_status) { 2557 case 0: 2558 if (calldata->roc) 2559 pnfs_roc_set_barrier(state->inode, 2560 calldata->roc_barrier); 2561 nfs_clear_open_stateid(state, &calldata->res.stateid, 0); 2562 renew_lease(server, calldata->timestamp); 2563 goto out_release; 2564 case -NFS4ERR_ADMIN_REVOKED: 2565 case -NFS4ERR_STALE_STATEID: 2566 case -NFS4ERR_OLD_STATEID: 2567 case -NFS4ERR_BAD_STATEID: 2568 case -NFS4ERR_EXPIRED: 2569 if (calldata->arg.fmode == 0) 2570 break; 2571 default: 2572 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) { 2573 rpc_restart_call_prepare(task); 2574 goto out_release; 2575 } 2576 } 2577 nfs_clear_open_stateid(state, NULL, calldata->arg.fmode); 2578 out_release: 2579 nfs_release_seqid(calldata->arg.seqid); 2580 nfs_refresh_inode(calldata->inode, calldata->res.fattr); 2581 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); 2582 } 2583 2584 static void nfs4_close_prepare(struct rpc_task *task, void *data) 2585 { 2586 struct nfs4_closedata *calldata = data; 2587 struct nfs4_state *state = calldata->state; 2588 struct inode *inode = calldata->inode; 2589 int call_close = 0; 2590 2591 dprintk("%s: begin!\n", __func__); 2592 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 2593 goto out_wait; 2594 2595 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 2596 calldata->arg.fmode = FMODE_READ|FMODE_WRITE; 2597 spin_lock(&state->owner->so_lock); 2598 /* Calculate the change in open mode */ 2599 if (state->n_rdwr == 0) { 2600 if (state->n_rdonly == 0) { 2601 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags); 2602 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); 2603 calldata->arg.fmode &= ~FMODE_READ; 2604 } 2605 if (state->n_wronly == 0) { 2606 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags); 2607 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags); 2608 calldata->arg.fmode &= ~FMODE_WRITE; 2609 } 2610 } 2611 if (!nfs4_valid_open_stateid(state)) 2612 call_close = 0; 2613 spin_unlock(&state->owner->so_lock); 2614 2615 if (!call_close) { 2616 /* Note: exit _without_ calling nfs4_close_done */ 2617 goto out_no_action; 2618 } 2619 2620 if (calldata->arg.fmode == 0) { 2621 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 2622 if (calldata->roc && 2623 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) { 2624 nfs_release_seqid(calldata->arg.seqid); 2625 goto out_wait; 2626 } 2627 } 2628 2629 nfs_fattr_init(calldata->res.fattr); 2630 calldata->timestamp = jiffies; 2631 if (nfs4_setup_sequence(NFS_SERVER(inode), 2632 &calldata->arg.seq_args, 2633 &calldata->res.seq_res, 2634 task) != 0) 2635 nfs_release_seqid(calldata->arg.seqid); 2636 dprintk("%s: done!\n", __func__); 2637 return; 2638 out_no_action: 2639 task->tk_action = NULL; 2640 out_wait: 2641 nfs4_sequence_done(task, &calldata->res.seq_res); 2642 } 2643 2644 static const struct rpc_call_ops nfs4_close_ops = { 2645 .rpc_call_prepare = nfs4_close_prepare, 2646 .rpc_call_done = nfs4_close_done, 2647 .rpc_release = nfs4_free_closedata, 2648 }; 2649 2650 /* 2651 * It is possible for data to be read/written from a mem-mapped file 2652 * after the sys_close call (which hits the vfs layer as a flush). 2653 * This means that we can't safely call nfsv4 close on a file until 2654 * the inode is cleared. This in turn means that we are not good 2655 * NFSv4 citizens - we do not indicate to the server to update the file's 2656 * share state even when we are done with one of the three share 2657 * stateid's in the inode. 2658 * 2659 * NOTE: Caller must be holding the sp->so_owner semaphore! 2660 */ 2661 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 2662 { 2663 struct nfs_server *server = NFS_SERVER(state->inode); 2664 struct nfs4_closedata *calldata; 2665 struct nfs4_state_owner *sp = state->owner; 2666 struct rpc_task *task; 2667 struct rpc_message msg = { 2668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 2669 .rpc_cred = state->owner->so_cred, 2670 }; 2671 struct rpc_task_setup task_setup_data = { 2672 .rpc_client = server->client, 2673 .rpc_message = &msg, 2674 .callback_ops = &nfs4_close_ops, 2675 .workqueue = nfsiod_workqueue, 2676 .flags = RPC_TASK_ASYNC, 2677 }; 2678 int status = -ENOMEM; 2679 2680 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 2681 &task_setup_data.rpc_client, &msg); 2682 2683 calldata = kzalloc(sizeof(*calldata), gfp_mask); 2684 if (calldata == NULL) 2685 goto out; 2686 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1); 2687 calldata->inode = state->inode; 2688 calldata->state = state; 2689 calldata->arg.fh = NFS_FH(state->inode); 2690 calldata->arg.stateid = &state->open_stateid; 2691 /* Serialization for the sequence id */ 2692 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask); 2693 if (calldata->arg.seqid == NULL) 2694 goto out_free_calldata; 2695 calldata->arg.fmode = 0; 2696 calldata->arg.bitmask = server->cache_consistency_bitmask; 2697 calldata->res.fattr = &calldata->fattr; 2698 calldata->res.seqid = calldata->arg.seqid; 2699 calldata->res.server = server; 2700 calldata->roc = pnfs_roc(state->inode); 2701 nfs_sb_active(calldata->inode->i_sb); 2702 2703 msg.rpc_argp = &calldata->arg; 2704 msg.rpc_resp = &calldata->res; 2705 task_setup_data.callback_data = calldata; 2706 task = rpc_run_task(&task_setup_data); 2707 if (IS_ERR(task)) 2708 return PTR_ERR(task); 2709 status = 0; 2710 if (wait) 2711 status = rpc_wait_for_completion_task(task); 2712 rpc_put_task(task); 2713 return status; 2714 out_free_calldata: 2715 kfree(calldata); 2716 out: 2717 nfs4_put_open_state(state); 2718 nfs4_put_state_owner(sp); 2719 return status; 2720 } 2721 2722 static struct inode * 2723 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 2724 int open_flags, struct iattr *attr, int *opened) 2725 { 2726 struct nfs4_state *state; 2727 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 2728 2729 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 2730 2731 /* Protect against concurrent sillydeletes */ 2732 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 2733 2734 nfs4_label_release_security(label); 2735 2736 if (IS_ERR(state)) 2737 return ERR_CAST(state); 2738 return state->inode; 2739 } 2740 2741 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 2742 { 2743 if (ctx->state == NULL) 2744 return; 2745 if (is_sync) 2746 nfs4_close_sync(ctx->state, ctx->mode); 2747 else 2748 nfs4_close_state(ctx->state, ctx->mode); 2749 } 2750 2751 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 2752 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 2753 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL) 2754 2755 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 2756 { 2757 struct nfs4_server_caps_arg args = { 2758 .fhandle = fhandle, 2759 }; 2760 struct nfs4_server_caps_res res = {}; 2761 struct rpc_message msg = { 2762 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 2763 .rpc_argp = &args, 2764 .rpc_resp = &res, 2765 }; 2766 int status; 2767 2768 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 2769 if (status == 0) { 2770 /* Sanity check the server answers */ 2771 switch (server->nfs_client->cl_minorversion) { 2772 case 0: 2773 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 2774 res.attr_bitmask[2] = 0; 2775 break; 2776 case 1: 2777 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 2778 break; 2779 case 2: 2780 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 2781 } 2782 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 2783 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| 2784 NFS_CAP_SYMLINKS|NFS_CAP_FILEID| 2785 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| 2786 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| 2787 NFS_CAP_CTIME|NFS_CAP_MTIME| 2788 NFS_CAP_SECURITY_LABEL); 2789 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 2790 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 2791 server->caps |= NFS_CAP_ACLS; 2792 if (res.has_links != 0) 2793 server->caps |= NFS_CAP_HARDLINKS; 2794 if (res.has_symlinks != 0) 2795 server->caps |= NFS_CAP_SYMLINKS; 2796 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) 2797 server->caps |= NFS_CAP_FILEID; 2798 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) 2799 server->caps |= NFS_CAP_MODE; 2800 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) 2801 server->caps |= NFS_CAP_NLINK; 2802 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) 2803 server->caps |= NFS_CAP_OWNER; 2804 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) 2805 server->caps |= NFS_CAP_OWNER_GROUP; 2806 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) 2807 server->caps |= NFS_CAP_ATIME; 2808 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) 2809 server->caps |= NFS_CAP_CTIME; 2810 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) 2811 server->caps |= NFS_CAP_MTIME; 2812 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 2813 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 2814 server->caps |= NFS_CAP_SECURITY_LABEL; 2815 #endif 2816 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 2817 sizeof(server->attr_bitmask)); 2818 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 2819 2820 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 2821 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 2822 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 2823 server->cache_consistency_bitmask[2] = 0; 2824 server->acl_bitmask = res.acl_bitmask; 2825 server->fh_expire_type = res.fh_expire_type; 2826 } 2827 2828 return status; 2829 } 2830 2831 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 2832 { 2833 struct nfs4_exception exception = { }; 2834 int err; 2835 do { 2836 err = nfs4_handle_exception(server, 2837 _nfs4_server_capabilities(server, fhandle), 2838 &exception); 2839 } while (exception.retry); 2840 return err; 2841 } 2842 2843 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 2844 struct nfs_fsinfo *info) 2845 { 2846 u32 bitmask[3]; 2847 struct nfs4_lookup_root_arg args = { 2848 .bitmask = bitmask, 2849 }; 2850 struct nfs4_lookup_res res = { 2851 .server = server, 2852 .fattr = info->fattr, 2853 .fh = fhandle, 2854 }; 2855 struct rpc_message msg = { 2856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 2857 .rpc_argp = &args, 2858 .rpc_resp = &res, 2859 }; 2860 2861 bitmask[0] = nfs4_fattr_bitmap[0]; 2862 bitmask[1] = nfs4_fattr_bitmap[1]; 2863 /* 2864 * Process the label in the upcoming getfattr 2865 */ 2866 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 2867 2868 nfs_fattr_init(info->fattr); 2869 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 2870 } 2871 2872 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 2873 struct nfs_fsinfo *info) 2874 { 2875 struct nfs4_exception exception = { }; 2876 int err; 2877 do { 2878 err = _nfs4_lookup_root(server, fhandle, info); 2879 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 2880 switch (err) { 2881 case 0: 2882 case -NFS4ERR_WRONGSEC: 2883 goto out; 2884 default: 2885 err = nfs4_handle_exception(server, err, &exception); 2886 } 2887 } while (exception.retry); 2888 out: 2889 return err; 2890 } 2891 2892 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 2893 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 2894 { 2895 struct rpc_auth_create_args auth_args = { 2896 .pseudoflavor = flavor, 2897 }; 2898 struct rpc_auth *auth; 2899 int ret; 2900 2901 auth = rpcauth_create(&auth_args, server->client); 2902 if (IS_ERR(auth)) { 2903 ret = -EACCES; 2904 goto out; 2905 } 2906 ret = nfs4_lookup_root(server, fhandle, info); 2907 out: 2908 return ret; 2909 } 2910 2911 /* 2912 * Retry pseudoroot lookup with various security flavors. We do this when: 2913 * 2914 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 2915 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 2916 * 2917 * Returns zero on success, or a negative NFS4ERR value, or a 2918 * negative errno value. 2919 */ 2920 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 2921 struct nfs_fsinfo *info) 2922 { 2923 /* Per 3530bis 15.33.5 */ 2924 static const rpc_authflavor_t flav_array[] = { 2925 RPC_AUTH_GSS_KRB5P, 2926 RPC_AUTH_GSS_KRB5I, 2927 RPC_AUTH_GSS_KRB5, 2928 RPC_AUTH_UNIX, /* courtesy */ 2929 RPC_AUTH_NULL, 2930 }; 2931 int status = -EPERM; 2932 size_t i; 2933 2934 if (server->auth_info.flavor_len > 0) { 2935 /* try each flavor specified by user */ 2936 for (i = 0; i < server->auth_info.flavor_len; i++) { 2937 status = nfs4_lookup_root_sec(server, fhandle, info, 2938 server->auth_info.flavors[i]); 2939 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 2940 continue; 2941 break; 2942 } 2943 } else { 2944 /* no flavors specified by user, try default list */ 2945 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 2946 status = nfs4_lookup_root_sec(server, fhandle, info, 2947 flav_array[i]); 2948 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 2949 continue; 2950 break; 2951 } 2952 } 2953 2954 /* 2955 * -EACCESS could mean that the user doesn't have correct permissions 2956 * to access the mount. It could also mean that we tried to mount 2957 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 2958 * existing mount programs don't handle -EACCES very well so it should 2959 * be mapped to -EPERM instead. 2960 */ 2961 if (status == -EACCES) 2962 status = -EPERM; 2963 return status; 2964 } 2965 2966 static int nfs4_do_find_root_sec(struct nfs_server *server, 2967 struct nfs_fh *fhandle, struct nfs_fsinfo *info) 2968 { 2969 int mv = server->nfs_client->cl_minorversion; 2970 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info); 2971 } 2972 2973 /** 2974 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 2975 * @server: initialized nfs_server handle 2976 * @fhandle: we fill in the pseudo-fs root file handle 2977 * @info: we fill in an FSINFO struct 2978 * @auth_probe: probe the auth flavours 2979 * 2980 * Returns zero on success, or a negative errno. 2981 */ 2982 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 2983 struct nfs_fsinfo *info, 2984 bool auth_probe) 2985 { 2986 int status; 2987 2988 switch (auth_probe) { 2989 case false: 2990 status = nfs4_lookup_root(server, fhandle, info); 2991 if (status != -NFS4ERR_WRONGSEC) 2992 break; 2993 default: 2994 status = nfs4_do_find_root_sec(server, fhandle, info); 2995 } 2996 2997 if (status == 0) 2998 status = nfs4_server_capabilities(server, fhandle); 2999 if (status == 0) 3000 status = nfs4_do_fsinfo(server, fhandle, info); 3001 3002 return nfs4_map_errors(status); 3003 } 3004 3005 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 3006 struct nfs_fsinfo *info) 3007 { 3008 int error; 3009 struct nfs_fattr *fattr = info->fattr; 3010 struct nfs4_label *label = NULL; 3011 3012 error = nfs4_server_capabilities(server, mntfh); 3013 if (error < 0) { 3014 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 3015 return error; 3016 } 3017 3018 label = nfs4_label_alloc(server, GFP_KERNEL); 3019 if (IS_ERR(label)) 3020 return PTR_ERR(label); 3021 3022 error = nfs4_proc_getattr(server, mntfh, fattr, label); 3023 if (error < 0) { 3024 dprintk("nfs4_get_root: getattr error = %d\n", -error); 3025 goto err_free_label; 3026 } 3027 3028 if (fattr->valid & NFS_ATTR_FATTR_FSID && 3029 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 3030 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 3031 3032 err_free_label: 3033 nfs4_label_free(label); 3034 3035 return error; 3036 } 3037 3038 /* 3039 * Get locations and (maybe) other attributes of a referral. 3040 * Note that we'll actually follow the referral later when 3041 * we detect fsid mismatch in inode revalidation 3042 */ 3043 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 3044 const struct qstr *name, struct nfs_fattr *fattr, 3045 struct nfs_fh *fhandle) 3046 { 3047 int status = -ENOMEM; 3048 struct page *page = NULL; 3049 struct nfs4_fs_locations *locations = NULL; 3050 3051 page = alloc_page(GFP_KERNEL); 3052 if (page == NULL) 3053 goto out; 3054 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 3055 if (locations == NULL) 3056 goto out; 3057 3058 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 3059 if (status != 0) 3060 goto out; 3061 3062 /* 3063 * If the fsid didn't change, this is a migration event, not a 3064 * referral. Cause us to drop into the exception handler, which 3065 * will kick off migration recovery. 3066 */ 3067 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 3068 dprintk("%s: server did not return a different fsid for" 3069 " a referral at %s\n", __func__, name->name); 3070 status = -NFS4ERR_MOVED; 3071 goto out; 3072 } 3073 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 3074 nfs_fixup_referral_attributes(&locations->fattr); 3075 3076 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 3077 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 3078 memset(fhandle, 0, sizeof(struct nfs_fh)); 3079 out: 3080 if (page) 3081 __free_page(page); 3082 kfree(locations); 3083 return status; 3084 } 3085 3086 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3087 struct nfs_fattr *fattr, struct nfs4_label *label) 3088 { 3089 struct nfs4_getattr_arg args = { 3090 .fh = fhandle, 3091 .bitmask = server->attr_bitmask, 3092 }; 3093 struct nfs4_getattr_res res = { 3094 .fattr = fattr, 3095 .label = label, 3096 .server = server, 3097 }; 3098 struct rpc_message msg = { 3099 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 3100 .rpc_argp = &args, 3101 .rpc_resp = &res, 3102 }; 3103 3104 args.bitmask = nfs4_bitmask(server, label); 3105 3106 nfs_fattr_init(fattr); 3107 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3108 } 3109 3110 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3111 struct nfs_fattr *fattr, struct nfs4_label *label) 3112 { 3113 struct nfs4_exception exception = { }; 3114 int err; 3115 do { 3116 err = _nfs4_proc_getattr(server, fhandle, fattr, label); 3117 trace_nfs4_getattr(server, fhandle, fattr, err); 3118 err = nfs4_handle_exception(server, err, 3119 &exception); 3120 } while (exception.retry); 3121 return err; 3122 } 3123 3124 /* 3125 * The file is not closed if it is opened due to the a request to change 3126 * the size of the file. The open call will not be needed once the 3127 * VFS layer lookup-intents are implemented. 3128 * 3129 * Close is called when the inode is destroyed. 3130 * If we haven't opened the file for O_WRONLY, we 3131 * need to in the size_change case to obtain a stateid. 3132 * 3133 * Got race? 3134 * Because OPEN is always done by name in nfsv4, it is 3135 * possible that we opened a different file by the same 3136 * name. We can recognize this race condition, but we 3137 * can't do anything about it besides returning an error. 3138 * 3139 * This will be fixed with VFS changes (lookup-intent). 3140 */ 3141 static int 3142 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 3143 struct iattr *sattr) 3144 { 3145 struct inode *inode = dentry->d_inode; 3146 struct rpc_cred *cred = NULL; 3147 struct nfs4_state *state = NULL; 3148 struct nfs4_label *label = NULL; 3149 int status; 3150 3151 if (pnfs_ld_layoutret_on_setattr(inode)) 3152 pnfs_commit_and_return_layout(inode); 3153 3154 nfs_fattr_init(fattr); 3155 3156 /* Deal with open(O_TRUNC) */ 3157 if (sattr->ia_valid & ATTR_OPEN) 3158 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 3159 3160 /* Optimization: if the end result is no change, don't RPC */ 3161 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 3162 return 0; 3163 3164 /* Search for an existing open(O_WRITE) file */ 3165 if (sattr->ia_valid & ATTR_FILE) { 3166 struct nfs_open_context *ctx; 3167 3168 ctx = nfs_file_open_context(sattr->ia_file); 3169 if (ctx) { 3170 cred = ctx->cred; 3171 state = ctx->state; 3172 } 3173 } 3174 3175 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 3176 if (IS_ERR(label)) 3177 return PTR_ERR(label); 3178 3179 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label); 3180 if (status == 0) { 3181 nfs_setattr_update_inode(inode, sattr); 3182 nfs_setsecurity(inode, fattr, label); 3183 } 3184 nfs4_label_free(label); 3185 return status; 3186 } 3187 3188 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 3189 const struct qstr *name, struct nfs_fh *fhandle, 3190 struct nfs_fattr *fattr, struct nfs4_label *label) 3191 { 3192 struct nfs_server *server = NFS_SERVER(dir); 3193 int status; 3194 struct nfs4_lookup_arg args = { 3195 .bitmask = server->attr_bitmask, 3196 .dir_fh = NFS_FH(dir), 3197 .name = name, 3198 }; 3199 struct nfs4_lookup_res res = { 3200 .server = server, 3201 .fattr = fattr, 3202 .label = label, 3203 .fh = fhandle, 3204 }; 3205 struct rpc_message msg = { 3206 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 3207 .rpc_argp = &args, 3208 .rpc_resp = &res, 3209 }; 3210 3211 args.bitmask = nfs4_bitmask(server, label); 3212 3213 nfs_fattr_init(fattr); 3214 3215 dprintk("NFS call lookup %s\n", name->name); 3216 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); 3217 dprintk("NFS reply lookup: %d\n", status); 3218 return status; 3219 } 3220 3221 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 3222 { 3223 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 3224 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 3225 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 3226 fattr->nlink = 2; 3227 } 3228 3229 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 3230 struct qstr *name, struct nfs_fh *fhandle, 3231 struct nfs_fattr *fattr, struct nfs4_label *label) 3232 { 3233 struct nfs4_exception exception = { }; 3234 struct rpc_clnt *client = *clnt; 3235 int err; 3236 do { 3237 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label); 3238 trace_nfs4_lookup(dir, name, err); 3239 switch (err) { 3240 case -NFS4ERR_BADNAME: 3241 err = -ENOENT; 3242 goto out; 3243 case -NFS4ERR_MOVED: 3244 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 3245 goto out; 3246 case -NFS4ERR_WRONGSEC: 3247 err = -EPERM; 3248 if (client != *clnt) 3249 goto out; 3250 client = nfs4_create_sec_client(client, dir, name); 3251 if (IS_ERR(client)) 3252 return PTR_ERR(client); 3253 3254 exception.retry = 1; 3255 break; 3256 default: 3257 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 3258 } 3259 } while (exception.retry); 3260 3261 out: 3262 if (err == 0) 3263 *clnt = client; 3264 else if (client != *clnt) 3265 rpc_shutdown_client(client); 3266 3267 return err; 3268 } 3269 3270 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, 3271 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 3272 struct nfs4_label *label) 3273 { 3274 int status; 3275 struct rpc_clnt *client = NFS_CLIENT(dir); 3276 3277 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label); 3278 if (client != NFS_CLIENT(dir)) { 3279 rpc_shutdown_client(client); 3280 nfs_fixup_secinfo_attributes(fattr); 3281 } 3282 return status; 3283 } 3284 3285 struct rpc_clnt * 3286 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name, 3287 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 3288 { 3289 struct rpc_clnt *client = NFS_CLIENT(dir); 3290 int status; 3291 3292 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL); 3293 if (status < 0) 3294 return ERR_PTR(status); 3295 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 3296 } 3297 3298 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 3299 { 3300 struct nfs_server *server = NFS_SERVER(inode); 3301 struct nfs4_accessargs args = { 3302 .fh = NFS_FH(inode), 3303 .bitmask = server->cache_consistency_bitmask, 3304 }; 3305 struct nfs4_accessres res = { 3306 .server = server, 3307 }; 3308 struct rpc_message msg = { 3309 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 3310 .rpc_argp = &args, 3311 .rpc_resp = &res, 3312 .rpc_cred = entry->cred, 3313 }; 3314 int mode = entry->mask; 3315 int status = 0; 3316 3317 /* 3318 * Determine which access bits we want to ask for... 3319 */ 3320 if (mode & MAY_READ) 3321 args.access |= NFS4_ACCESS_READ; 3322 if (S_ISDIR(inode->i_mode)) { 3323 if (mode & MAY_WRITE) 3324 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; 3325 if (mode & MAY_EXEC) 3326 args.access |= NFS4_ACCESS_LOOKUP; 3327 } else { 3328 if (mode & MAY_WRITE) 3329 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; 3330 if (mode & MAY_EXEC) 3331 args.access |= NFS4_ACCESS_EXECUTE; 3332 } 3333 3334 res.fattr = nfs_alloc_fattr(); 3335 if (res.fattr == NULL) 3336 return -ENOMEM; 3337 3338 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3339 if (!status) { 3340 nfs_access_set_mask(entry, res.access); 3341 nfs_refresh_inode(inode, res.fattr); 3342 } 3343 nfs_free_fattr(res.fattr); 3344 return status; 3345 } 3346 3347 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 3348 { 3349 struct nfs4_exception exception = { }; 3350 int err; 3351 do { 3352 err = _nfs4_proc_access(inode, entry); 3353 trace_nfs4_access(inode, err); 3354 err = nfs4_handle_exception(NFS_SERVER(inode), err, 3355 &exception); 3356 } while (exception.retry); 3357 return err; 3358 } 3359 3360 /* 3361 * TODO: For the time being, we don't try to get any attributes 3362 * along with any of the zero-copy operations READ, READDIR, 3363 * READLINK, WRITE. 3364 * 3365 * In the case of the first three, we want to put the GETATTR 3366 * after the read-type operation -- this is because it is hard 3367 * to predict the length of a GETATTR response in v4, and thus 3368 * align the READ data correctly. This means that the GETATTR 3369 * may end up partially falling into the page cache, and we should 3370 * shift it into the 'tail' of the xdr_buf before processing. 3371 * To do this efficiently, we need to know the total length 3372 * of data received, which doesn't seem to be available outside 3373 * of the RPC layer. 3374 * 3375 * In the case of WRITE, we also want to put the GETATTR after 3376 * the operation -- in this case because we want to make sure 3377 * we get the post-operation mtime and size. 3378 * 3379 * Both of these changes to the XDR layer would in fact be quite 3380 * minor, but I decided to leave them for a subsequent patch. 3381 */ 3382 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 3383 unsigned int pgbase, unsigned int pglen) 3384 { 3385 struct nfs4_readlink args = { 3386 .fh = NFS_FH(inode), 3387 .pgbase = pgbase, 3388 .pglen = pglen, 3389 .pages = &page, 3390 }; 3391 struct nfs4_readlink_res res; 3392 struct rpc_message msg = { 3393 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 3394 .rpc_argp = &args, 3395 .rpc_resp = &res, 3396 }; 3397 3398 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 3399 } 3400 3401 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 3402 unsigned int pgbase, unsigned int pglen) 3403 { 3404 struct nfs4_exception exception = { }; 3405 int err; 3406 do { 3407 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 3408 trace_nfs4_readlink(inode, err); 3409 err = nfs4_handle_exception(NFS_SERVER(inode), err, 3410 &exception); 3411 } while (exception.retry); 3412 return err; 3413 } 3414 3415 /* 3416 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 3417 */ 3418 static int 3419 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 3420 int flags) 3421 { 3422 struct nfs4_label l, *ilabel = NULL; 3423 struct nfs_open_context *ctx; 3424 struct nfs4_state *state; 3425 int opened = 0; 3426 int status = 0; 3427 3428 ctx = alloc_nfs_open_context(dentry, FMODE_READ); 3429 if (IS_ERR(ctx)) 3430 return PTR_ERR(ctx); 3431 3432 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 3433 3434 sattr->ia_mode &= ~current_umask(); 3435 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened); 3436 if (IS_ERR(state)) { 3437 status = PTR_ERR(state); 3438 goto out; 3439 } 3440 out: 3441 nfs4_label_release_security(ilabel); 3442 put_nfs_open_context(ctx); 3443 return status; 3444 } 3445 3446 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name) 3447 { 3448 struct nfs_server *server = NFS_SERVER(dir); 3449 struct nfs_removeargs args = { 3450 .fh = NFS_FH(dir), 3451 .name = *name, 3452 }; 3453 struct nfs_removeres res = { 3454 .server = server, 3455 }; 3456 struct rpc_message msg = { 3457 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 3458 .rpc_argp = &args, 3459 .rpc_resp = &res, 3460 }; 3461 int status; 3462 3463 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 3464 if (status == 0) 3465 update_changeattr(dir, &res.cinfo); 3466 return status; 3467 } 3468 3469 static int nfs4_proc_remove(struct inode *dir, struct qstr *name) 3470 { 3471 struct nfs4_exception exception = { }; 3472 int err; 3473 do { 3474 err = _nfs4_proc_remove(dir, name); 3475 trace_nfs4_remove(dir, name, err); 3476 err = nfs4_handle_exception(NFS_SERVER(dir), err, 3477 &exception); 3478 } while (exception.retry); 3479 return err; 3480 } 3481 3482 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 3483 { 3484 struct nfs_server *server = NFS_SERVER(dir); 3485 struct nfs_removeargs *args = msg->rpc_argp; 3486 struct nfs_removeres *res = msg->rpc_resp; 3487 3488 res->server = server; 3489 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 3490 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1); 3491 3492 nfs_fattr_init(res->dir_attr); 3493 } 3494 3495 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 3496 { 3497 nfs4_setup_sequence(NFS_SERVER(data->dir), 3498 &data->args.seq_args, 3499 &data->res.seq_res, 3500 task); 3501 } 3502 3503 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 3504 { 3505 struct nfs_unlinkdata *data = task->tk_calldata; 3506 struct nfs_removeres *res = &data->res; 3507 3508 if (!nfs4_sequence_done(task, &res->seq_res)) 3509 return 0; 3510 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) 3511 return 0; 3512 update_changeattr(dir, &res->cinfo); 3513 return 1; 3514 } 3515 3516 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir) 3517 { 3518 struct nfs_server *server = NFS_SERVER(dir); 3519 struct nfs_renameargs *arg = msg->rpc_argp; 3520 struct nfs_renameres *res = msg->rpc_resp; 3521 3522 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 3523 res->server = server; 3524 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1); 3525 } 3526 3527 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 3528 { 3529 nfs4_setup_sequence(NFS_SERVER(data->old_dir), 3530 &data->args.seq_args, 3531 &data->res.seq_res, 3532 task); 3533 } 3534 3535 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 3536 struct inode *new_dir) 3537 { 3538 struct nfs_renamedata *data = task->tk_calldata; 3539 struct nfs_renameres *res = &data->res; 3540 3541 if (!nfs4_sequence_done(task, &res->seq_res)) 3542 return 0; 3543 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN) 3544 return 0; 3545 3546 update_changeattr(old_dir, &res->old_cinfo); 3547 update_changeattr(new_dir, &res->new_cinfo); 3548 return 1; 3549 } 3550 3551 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 3552 { 3553 struct nfs_server *server = NFS_SERVER(inode); 3554 struct nfs4_link_arg arg = { 3555 .fh = NFS_FH(inode), 3556 .dir_fh = NFS_FH(dir), 3557 .name = name, 3558 .bitmask = server->attr_bitmask, 3559 }; 3560 struct nfs4_link_res res = { 3561 .server = server, 3562 .label = NULL, 3563 }; 3564 struct rpc_message msg = { 3565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 3566 .rpc_argp = &arg, 3567 .rpc_resp = &res, 3568 }; 3569 int status = -ENOMEM; 3570 3571 res.fattr = nfs_alloc_fattr(); 3572 if (res.fattr == NULL) 3573 goto out; 3574 3575 res.label = nfs4_label_alloc(server, GFP_KERNEL); 3576 if (IS_ERR(res.label)) { 3577 status = PTR_ERR(res.label); 3578 goto out; 3579 } 3580 arg.bitmask = nfs4_bitmask(server, res.label); 3581 3582 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 3583 if (!status) { 3584 update_changeattr(dir, &res.cinfo); 3585 status = nfs_post_op_update_inode(inode, res.fattr); 3586 if (!status) 3587 nfs_setsecurity(inode, res.fattr, res.label); 3588 } 3589 3590 3591 nfs4_label_free(res.label); 3592 3593 out: 3594 nfs_free_fattr(res.fattr); 3595 return status; 3596 } 3597 3598 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name) 3599 { 3600 struct nfs4_exception exception = { }; 3601 int err; 3602 do { 3603 err = nfs4_handle_exception(NFS_SERVER(inode), 3604 _nfs4_proc_link(inode, dir, name), 3605 &exception); 3606 } while (exception.retry); 3607 return err; 3608 } 3609 3610 struct nfs4_createdata { 3611 struct rpc_message msg; 3612 struct nfs4_create_arg arg; 3613 struct nfs4_create_res res; 3614 struct nfs_fh fh; 3615 struct nfs_fattr fattr; 3616 struct nfs4_label *label; 3617 }; 3618 3619 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 3620 struct qstr *name, struct iattr *sattr, u32 ftype) 3621 { 3622 struct nfs4_createdata *data; 3623 3624 data = kzalloc(sizeof(*data), GFP_KERNEL); 3625 if (data != NULL) { 3626 struct nfs_server *server = NFS_SERVER(dir); 3627 3628 data->label = nfs4_label_alloc(server, GFP_KERNEL); 3629 if (IS_ERR(data->label)) 3630 goto out_free; 3631 3632 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 3633 data->msg.rpc_argp = &data->arg; 3634 data->msg.rpc_resp = &data->res; 3635 data->arg.dir_fh = NFS_FH(dir); 3636 data->arg.server = server; 3637 data->arg.name = name; 3638 data->arg.attrs = sattr; 3639 data->arg.ftype = ftype; 3640 data->arg.bitmask = nfs4_bitmask(server, data->label); 3641 data->res.server = server; 3642 data->res.fh = &data->fh; 3643 data->res.fattr = &data->fattr; 3644 data->res.label = data->label; 3645 nfs_fattr_init(data->res.fattr); 3646 } 3647 return data; 3648 out_free: 3649 kfree(data); 3650 return NULL; 3651 } 3652 3653 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 3654 { 3655 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 3656 &data->arg.seq_args, &data->res.seq_res, 1); 3657 if (status == 0) { 3658 update_changeattr(dir, &data->res.dir_cinfo); 3659 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); 3660 } 3661 return status; 3662 } 3663 3664 static void nfs4_free_createdata(struct nfs4_createdata *data) 3665 { 3666 nfs4_label_free(data->label); 3667 kfree(data); 3668 } 3669 3670 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 3671 struct page *page, unsigned int len, struct iattr *sattr, 3672 struct nfs4_label *label) 3673 { 3674 struct nfs4_createdata *data; 3675 int status = -ENAMETOOLONG; 3676 3677 if (len > NFS4_MAXPATHLEN) 3678 goto out; 3679 3680 status = -ENOMEM; 3681 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 3682 if (data == NULL) 3683 goto out; 3684 3685 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 3686 data->arg.u.symlink.pages = &page; 3687 data->arg.u.symlink.len = len; 3688 data->arg.label = label; 3689 3690 status = nfs4_do_create(dir, dentry, data); 3691 3692 nfs4_free_createdata(data); 3693 out: 3694 return status; 3695 } 3696 3697 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 3698 struct page *page, unsigned int len, struct iattr *sattr) 3699 { 3700 struct nfs4_exception exception = { }; 3701 struct nfs4_label l, *label = NULL; 3702 int err; 3703 3704 label = nfs4_label_init_security(dir, dentry, sattr, &l); 3705 3706 do { 3707 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 3708 trace_nfs4_symlink(dir, &dentry->d_name, err); 3709 err = nfs4_handle_exception(NFS_SERVER(dir), err, 3710 &exception); 3711 } while (exception.retry); 3712 3713 nfs4_label_release_security(label); 3714 return err; 3715 } 3716 3717 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 3718 struct iattr *sattr, struct nfs4_label *label) 3719 { 3720 struct nfs4_createdata *data; 3721 int status = -ENOMEM; 3722 3723 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 3724 if (data == NULL) 3725 goto out; 3726 3727 data->arg.label = label; 3728 status = nfs4_do_create(dir, dentry, data); 3729 3730 nfs4_free_createdata(data); 3731 out: 3732 return status; 3733 } 3734 3735 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 3736 struct iattr *sattr) 3737 { 3738 struct nfs4_exception exception = { }; 3739 struct nfs4_label l, *label = NULL; 3740 int err; 3741 3742 label = nfs4_label_init_security(dir, dentry, sattr, &l); 3743 3744 sattr->ia_mode &= ~current_umask(); 3745 do { 3746 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 3747 trace_nfs4_mkdir(dir, &dentry->d_name, err); 3748 err = nfs4_handle_exception(NFS_SERVER(dir), err, 3749 &exception); 3750 } while (exception.retry); 3751 nfs4_label_release_security(label); 3752 3753 return err; 3754 } 3755 3756 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 3757 u64 cookie, struct page **pages, unsigned int count, int plus) 3758 { 3759 struct inode *dir = dentry->d_inode; 3760 struct nfs4_readdir_arg args = { 3761 .fh = NFS_FH(dir), 3762 .pages = pages, 3763 .pgbase = 0, 3764 .count = count, 3765 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask, 3766 .plus = plus, 3767 }; 3768 struct nfs4_readdir_res res; 3769 struct rpc_message msg = { 3770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 3771 .rpc_argp = &args, 3772 .rpc_resp = &res, 3773 .rpc_cred = cred, 3774 }; 3775 int status; 3776 3777 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__, 3778 dentry, 3779 (unsigned long long)cookie); 3780 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); 3781 res.pgbase = args.pgbase; 3782 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); 3783 if (status >= 0) { 3784 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); 3785 status += args.pgbase; 3786 } 3787 3788 nfs_invalidate_atime(dir); 3789 3790 dprintk("%s: returns %d\n", __func__, status); 3791 return status; 3792 } 3793 3794 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 3795 u64 cookie, struct page **pages, unsigned int count, int plus) 3796 { 3797 struct nfs4_exception exception = { }; 3798 int err; 3799 do { 3800 err = _nfs4_proc_readdir(dentry, cred, cookie, 3801 pages, count, plus); 3802 trace_nfs4_readdir(dentry->d_inode, err); 3803 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err, 3804 &exception); 3805 } while (exception.retry); 3806 return err; 3807 } 3808 3809 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 3810 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 3811 { 3812 struct nfs4_createdata *data; 3813 int mode = sattr->ia_mode; 3814 int status = -ENOMEM; 3815 3816 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 3817 if (data == NULL) 3818 goto out; 3819 3820 if (S_ISFIFO(mode)) 3821 data->arg.ftype = NF4FIFO; 3822 else if (S_ISBLK(mode)) { 3823 data->arg.ftype = NF4BLK; 3824 data->arg.u.device.specdata1 = MAJOR(rdev); 3825 data->arg.u.device.specdata2 = MINOR(rdev); 3826 } 3827 else if (S_ISCHR(mode)) { 3828 data->arg.ftype = NF4CHR; 3829 data->arg.u.device.specdata1 = MAJOR(rdev); 3830 data->arg.u.device.specdata2 = MINOR(rdev); 3831 } else if (!S_ISSOCK(mode)) { 3832 status = -EINVAL; 3833 goto out_free; 3834 } 3835 3836 data->arg.label = label; 3837 status = nfs4_do_create(dir, dentry, data); 3838 out_free: 3839 nfs4_free_createdata(data); 3840 out: 3841 return status; 3842 } 3843 3844 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 3845 struct iattr *sattr, dev_t rdev) 3846 { 3847 struct nfs4_exception exception = { }; 3848 struct nfs4_label l, *label = NULL; 3849 int err; 3850 3851 label = nfs4_label_init_security(dir, dentry, sattr, &l); 3852 3853 sattr->ia_mode &= ~current_umask(); 3854 do { 3855 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 3856 trace_nfs4_mknod(dir, &dentry->d_name, err); 3857 err = nfs4_handle_exception(NFS_SERVER(dir), err, 3858 &exception); 3859 } while (exception.retry); 3860 3861 nfs4_label_release_security(label); 3862 3863 return err; 3864 } 3865 3866 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 3867 struct nfs_fsstat *fsstat) 3868 { 3869 struct nfs4_statfs_arg args = { 3870 .fh = fhandle, 3871 .bitmask = server->attr_bitmask, 3872 }; 3873 struct nfs4_statfs_res res = { 3874 .fsstat = fsstat, 3875 }; 3876 struct rpc_message msg = { 3877 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 3878 .rpc_argp = &args, 3879 .rpc_resp = &res, 3880 }; 3881 3882 nfs_fattr_init(fsstat->fattr); 3883 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3884 } 3885 3886 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 3887 { 3888 struct nfs4_exception exception = { }; 3889 int err; 3890 do { 3891 err = nfs4_handle_exception(server, 3892 _nfs4_proc_statfs(server, fhandle, fsstat), 3893 &exception); 3894 } while (exception.retry); 3895 return err; 3896 } 3897 3898 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 3899 struct nfs_fsinfo *fsinfo) 3900 { 3901 struct nfs4_fsinfo_arg args = { 3902 .fh = fhandle, 3903 .bitmask = server->attr_bitmask, 3904 }; 3905 struct nfs4_fsinfo_res res = { 3906 .fsinfo = fsinfo, 3907 }; 3908 struct rpc_message msg = { 3909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 3910 .rpc_argp = &args, 3911 .rpc_resp = &res, 3912 }; 3913 3914 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3915 } 3916 3917 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 3918 { 3919 struct nfs4_exception exception = { }; 3920 unsigned long now = jiffies; 3921 int err; 3922 3923 do { 3924 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 3925 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 3926 if (err == 0) { 3927 struct nfs_client *clp = server->nfs_client; 3928 3929 spin_lock(&clp->cl_lock); 3930 clp->cl_lease_time = fsinfo->lease_time * HZ; 3931 clp->cl_last_renewal = now; 3932 spin_unlock(&clp->cl_lock); 3933 break; 3934 } 3935 err = nfs4_handle_exception(server, err, &exception); 3936 } while (exception.retry); 3937 return err; 3938 } 3939 3940 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 3941 { 3942 int error; 3943 3944 nfs_fattr_init(fsinfo->fattr); 3945 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 3946 if (error == 0) { 3947 /* block layout checks this! */ 3948 server->pnfs_blksize = fsinfo->blksize; 3949 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype); 3950 } 3951 3952 return error; 3953 } 3954 3955 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 3956 struct nfs_pathconf *pathconf) 3957 { 3958 struct nfs4_pathconf_arg args = { 3959 .fh = fhandle, 3960 .bitmask = server->attr_bitmask, 3961 }; 3962 struct nfs4_pathconf_res res = { 3963 .pathconf = pathconf, 3964 }; 3965 struct rpc_message msg = { 3966 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 3967 .rpc_argp = &args, 3968 .rpc_resp = &res, 3969 }; 3970 3971 /* None of the pathconf attributes are mandatory to implement */ 3972 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 3973 memset(pathconf, 0, sizeof(*pathconf)); 3974 return 0; 3975 } 3976 3977 nfs_fattr_init(pathconf->fattr); 3978 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3979 } 3980 3981 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 3982 struct nfs_pathconf *pathconf) 3983 { 3984 struct nfs4_exception exception = { }; 3985 int err; 3986 3987 do { 3988 err = nfs4_handle_exception(server, 3989 _nfs4_proc_pathconf(server, fhandle, pathconf), 3990 &exception); 3991 } while (exception.retry); 3992 return err; 3993 } 3994 3995 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 3996 const struct nfs_open_context *ctx, 3997 const struct nfs_lock_context *l_ctx, 3998 fmode_t fmode) 3999 { 4000 const struct nfs_lockowner *lockowner = NULL; 4001 4002 if (l_ctx != NULL) 4003 lockowner = &l_ctx->lockowner; 4004 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner); 4005 } 4006 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 4007 4008 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 4009 const struct nfs_open_context *ctx, 4010 const struct nfs_lock_context *l_ctx, 4011 fmode_t fmode) 4012 { 4013 nfs4_stateid current_stateid; 4014 4015 /* If the current stateid represents a lost lock, then exit */ 4016 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO) 4017 return true; 4018 return nfs4_stateid_match(stateid, ¤t_stateid); 4019 } 4020 4021 static bool nfs4_error_stateid_expired(int err) 4022 { 4023 switch (err) { 4024 case -NFS4ERR_DELEG_REVOKED: 4025 case -NFS4ERR_ADMIN_REVOKED: 4026 case -NFS4ERR_BAD_STATEID: 4027 case -NFS4ERR_STALE_STATEID: 4028 case -NFS4ERR_OLD_STATEID: 4029 case -NFS4ERR_OPENMODE: 4030 case -NFS4ERR_EXPIRED: 4031 return true; 4032 } 4033 return false; 4034 } 4035 4036 void __nfs4_read_done_cb(struct nfs_pgio_data *data) 4037 { 4038 nfs_invalidate_atime(data->header->inode); 4039 } 4040 4041 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_data *data) 4042 { 4043 struct nfs_server *server = NFS_SERVER(data->header->inode); 4044 4045 trace_nfs4_read(data, task->tk_status); 4046 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) { 4047 rpc_restart_call_prepare(task); 4048 return -EAGAIN; 4049 } 4050 4051 __nfs4_read_done_cb(data); 4052 if (task->tk_status > 0) 4053 renew_lease(server, data->timestamp); 4054 return 0; 4055 } 4056 4057 static bool nfs4_read_stateid_changed(struct rpc_task *task, 4058 struct nfs_pgio_args *args) 4059 { 4060 4061 if (!nfs4_error_stateid_expired(task->tk_status) || 4062 nfs4_stateid_is_current(&args->stateid, 4063 args->context, 4064 args->lock_context, 4065 FMODE_READ)) 4066 return false; 4067 rpc_restart_call_prepare(task); 4068 return true; 4069 } 4070 4071 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_data *data) 4072 { 4073 4074 dprintk("--> %s\n", __func__); 4075 4076 if (!nfs4_sequence_done(task, &data->res.seq_res)) 4077 return -EAGAIN; 4078 if (nfs4_read_stateid_changed(task, &data->args)) 4079 return -EAGAIN; 4080 return data->pgio_done_cb ? data->pgio_done_cb(task, data) : 4081 nfs4_read_done_cb(task, data); 4082 } 4083 4084 static void nfs4_proc_read_setup(struct nfs_pgio_data *data, struct rpc_message *msg) 4085 { 4086 data->timestamp = jiffies; 4087 data->pgio_done_cb = nfs4_read_done_cb; 4088 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 4089 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 4090 } 4091 4092 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, struct nfs_pgio_data *data) 4093 { 4094 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode), 4095 &data->args.seq_args, 4096 &data->res.seq_res, 4097 task)) 4098 return 0; 4099 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context, 4100 data->args.lock_context, data->header->rw_ops->rw_mode) == -EIO) 4101 return -EIO; 4102 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags))) 4103 return -EIO; 4104 return 0; 4105 } 4106 4107 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_pgio_data *data) 4108 { 4109 struct inode *inode = data->header->inode; 4110 4111 trace_nfs4_write(data, task->tk_status); 4112 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) { 4113 rpc_restart_call_prepare(task); 4114 return -EAGAIN; 4115 } 4116 if (task->tk_status >= 0) { 4117 renew_lease(NFS_SERVER(inode), data->timestamp); 4118 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 4119 } 4120 return 0; 4121 } 4122 4123 static bool nfs4_write_stateid_changed(struct rpc_task *task, 4124 struct nfs_pgio_args *args) 4125 { 4126 4127 if (!nfs4_error_stateid_expired(task->tk_status) || 4128 nfs4_stateid_is_current(&args->stateid, 4129 args->context, 4130 args->lock_context, 4131 FMODE_WRITE)) 4132 return false; 4133 rpc_restart_call_prepare(task); 4134 return true; 4135 } 4136 4137 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_data *data) 4138 { 4139 if (!nfs4_sequence_done(task, &data->res.seq_res)) 4140 return -EAGAIN; 4141 if (nfs4_write_stateid_changed(task, &data->args)) 4142 return -EAGAIN; 4143 return data->pgio_done_cb ? data->pgio_done_cb(task, data) : 4144 nfs4_write_done_cb(task, data); 4145 } 4146 4147 static 4148 bool nfs4_write_need_cache_consistency_data(const struct nfs_pgio_data *data) 4149 { 4150 const struct nfs_pgio_header *hdr = data->header; 4151 4152 /* Don't request attributes for pNFS or O_DIRECT writes */ 4153 if (data->ds_clp != NULL || hdr->dreq != NULL) 4154 return false; 4155 /* Otherwise, request attributes if and only if we don't hold 4156 * a delegation 4157 */ 4158 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 4159 } 4160 4161 static void nfs4_proc_write_setup(struct nfs_pgio_data *data, struct rpc_message *msg) 4162 { 4163 struct nfs_server *server = NFS_SERVER(data->header->inode); 4164 4165 if (!nfs4_write_need_cache_consistency_data(data)) { 4166 data->args.bitmask = NULL; 4167 data->res.fattr = NULL; 4168 } else 4169 data->args.bitmask = server->cache_consistency_bitmask; 4170 4171 if (!data->pgio_done_cb) 4172 data->pgio_done_cb = nfs4_write_done_cb; 4173 data->res.server = server; 4174 data->timestamp = jiffies; 4175 4176 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 4177 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 4178 } 4179 4180 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 4181 { 4182 nfs4_setup_sequence(NFS_SERVER(data->inode), 4183 &data->args.seq_args, 4184 &data->res.seq_res, 4185 task); 4186 } 4187 4188 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 4189 { 4190 struct inode *inode = data->inode; 4191 4192 trace_nfs4_commit(data, task->tk_status); 4193 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) { 4194 rpc_restart_call_prepare(task); 4195 return -EAGAIN; 4196 } 4197 return 0; 4198 } 4199 4200 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 4201 { 4202 if (!nfs4_sequence_done(task, &data->res.seq_res)) 4203 return -EAGAIN; 4204 return data->commit_done_cb(task, data); 4205 } 4206 4207 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) 4208 { 4209 struct nfs_server *server = NFS_SERVER(data->inode); 4210 4211 if (data->commit_done_cb == NULL) 4212 data->commit_done_cb = nfs4_commit_done_cb; 4213 data->res.server = server; 4214 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 4215 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 4216 } 4217 4218 struct nfs4_renewdata { 4219 struct nfs_client *client; 4220 unsigned long timestamp; 4221 }; 4222 4223 /* 4224 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 4225 * standalone procedure for queueing an asynchronous RENEW. 4226 */ 4227 static void nfs4_renew_release(void *calldata) 4228 { 4229 struct nfs4_renewdata *data = calldata; 4230 struct nfs_client *clp = data->client; 4231 4232 if (atomic_read(&clp->cl_count) > 1) 4233 nfs4_schedule_state_renewal(clp); 4234 nfs_put_client(clp); 4235 kfree(data); 4236 } 4237 4238 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 4239 { 4240 struct nfs4_renewdata *data = calldata; 4241 struct nfs_client *clp = data->client; 4242 unsigned long timestamp = data->timestamp; 4243 4244 trace_nfs4_renew_async(clp, task->tk_status); 4245 switch (task->tk_status) { 4246 case 0: 4247 break; 4248 case -NFS4ERR_LEASE_MOVED: 4249 nfs4_schedule_lease_moved_recovery(clp); 4250 break; 4251 default: 4252 /* Unless we're shutting down, schedule state recovery! */ 4253 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 4254 return; 4255 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 4256 nfs4_schedule_lease_recovery(clp); 4257 return; 4258 } 4259 nfs4_schedule_path_down_recovery(clp); 4260 } 4261 do_renew_lease(clp, timestamp); 4262 } 4263 4264 static const struct rpc_call_ops nfs4_renew_ops = { 4265 .rpc_call_done = nfs4_renew_done, 4266 .rpc_release = nfs4_renew_release, 4267 }; 4268 4269 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) 4270 { 4271 struct rpc_message msg = { 4272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 4273 .rpc_argp = clp, 4274 .rpc_cred = cred, 4275 }; 4276 struct nfs4_renewdata *data; 4277 4278 if (renew_flags == 0) 4279 return 0; 4280 if (!atomic_inc_not_zero(&clp->cl_count)) 4281 return -EIO; 4282 data = kmalloc(sizeof(*data), GFP_NOFS); 4283 if (data == NULL) 4284 return -ENOMEM; 4285 data->client = clp; 4286 data->timestamp = jiffies; 4287 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 4288 &nfs4_renew_ops, data); 4289 } 4290 4291 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) 4292 { 4293 struct rpc_message msg = { 4294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 4295 .rpc_argp = clp, 4296 .rpc_cred = cred, 4297 }; 4298 unsigned long now = jiffies; 4299 int status; 4300 4301 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 4302 if (status < 0) 4303 return status; 4304 do_renew_lease(clp, now); 4305 return 0; 4306 } 4307 4308 static inline int nfs4_server_supports_acls(struct nfs_server *server) 4309 { 4310 return server->caps & NFS_CAP_ACLS; 4311 } 4312 4313 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 4314 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 4315 * the stack. 4316 */ 4317 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 4318 4319 static int buf_to_pages_noslab(const void *buf, size_t buflen, 4320 struct page **pages, unsigned int *pgbase) 4321 { 4322 struct page *newpage, **spages; 4323 int rc = 0; 4324 size_t len; 4325 spages = pages; 4326 4327 do { 4328 len = min_t(size_t, PAGE_SIZE, buflen); 4329 newpage = alloc_page(GFP_KERNEL); 4330 4331 if (newpage == NULL) 4332 goto unwind; 4333 memcpy(page_address(newpage), buf, len); 4334 buf += len; 4335 buflen -= len; 4336 *pages++ = newpage; 4337 rc++; 4338 } while (buflen != 0); 4339 4340 return rc; 4341 4342 unwind: 4343 for(; rc > 0; rc--) 4344 __free_page(spages[rc-1]); 4345 return -ENOMEM; 4346 } 4347 4348 struct nfs4_cached_acl { 4349 int cached; 4350 size_t len; 4351 char data[0]; 4352 }; 4353 4354 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 4355 { 4356 struct nfs_inode *nfsi = NFS_I(inode); 4357 4358 spin_lock(&inode->i_lock); 4359 kfree(nfsi->nfs4_acl); 4360 nfsi->nfs4_acl = acl; 4361 spin_unlock(&inode->i_lock); 4362 } 4363 4364 static void nfs4_zap_acl_attr(struct inode *inode) 4365 { 4366 nfs4_set_cached_acl(inode, NULL); 4367 } 4368 4369 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 4370 { 4371 struct nfs_inode *nfsi = NFS_I(inode); 4372 struct nfs4_cached_acl *acl; 4373 int ret = -ENOENT; 4374 4375 spin_lock(&inode->i_lock); 4376 acl = nfsi->nfs4_acl; 4377 if (acl == NULL) 4378 goto out; 4379 if (buf == NULL) /* user is just asking for length */ 4380 goto out_len; 4381 if (acl->cached == 0) 4382 goto out; 4383 ret = -ERANGE; /* see getxattr(2) man page */ 4384 if (acl->len > buflen) 4385 goto out; 4386 memcpy(buf, acl->data, acl->len); 4387 out_len: 4388 ret = acl->len; 4389 out: 4390 spin_unlock(&inode->i_lock); 4391 return ret; 4392 } 4393 4394 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 4395 { 4396 struct nfs4_cached_acl *acl; 4397 size_t buflen = sizeof(*acl) + acl_len; 4398 4399 if (buflen <= PAGE_SIZE) { 4400 acl = kmalloc(buflen, GFP_KERNEL); 4401 if (acl == NULL) 4402 goto out; 4403 acl->cached = 1; 4404 _copy_from_pages(acl->data, pages, pgbase, acl_len); 4405 } else { 4406 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 4407 if (acl == NULL) 4408 goto out; 4409 acl->cached = 0; 4410 } 4411 acl->len = acl_len; 4412 out: 4413 nfs4_set_cached_acl(inode, acl); 4414 } 4415 4416 /* 4417 * The getxattr API returns the required buffer length when called with a 4418 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 4419 * the required buf. On a NULL buf, we send a page of data to the server 4420 * guessing that the ACL request can be serviced by a page. If so, we cache 4421 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 4422 * the cache. If not so, we throw away the page, and cache the required 4423 * length. The next getxattr call will then produce another round trip to 4424 * the server, this time with the input buf of the required size. 4425 */ 4426 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 4427 { 4428 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, }; 4429 struct nfs_getaclargs args = { 4430 .fh = NFS_FH(inode), 4431 .acl_pages = pages, 4432 .acl_len = buflen, 4433 }; 4434 struct nfs_getaclres res = { 4435 .acl_len = buflen, 4436 }; 4437 struct rpc_message msg = { 4438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 4439 .rpc_argp = &args, 4440 .rpc_resp = &res, 4441 }; 4442 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 4443 int ret = -ENOMEM, i; 4444 4445 /* As long as we're doing a round trip to the server anyway, 4446 * let's be prepared for a page of acl data. */ 4447 if (npages == 0) 4448 npages = 1; 4449 if (npages > ARRAY_SIZE(pages)) 4450 return -ERANGE; 4451 4452 for (i = 0; i < npages; i++) { 4453 pages[i] = alloc_page(GFP_KERNEL); 4454 if (!pages[i]) 4455 goto out_free; 4456 } 4457 4458 /* for decoding across pages */ 4459 res.acl_scratch = alloc_page(GFP_KERNEL); 4460 if (!res.acl_scratch) 4461 goto out_free; 4462 4463 args.acl_len = npages * PAGE_SIZE; 4464 args.acl_pgbase = 0; 4465 4466 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 4467 __func__, buf, buflen, npages, args.acl_len); 4468 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 4469 &msg, &args.seq_args, &res.seq_res, 0); 4470 if (ret) 4471 goto out_free; 4472 4473 /* Handle the case where the passed-in buffer is too short */ 4474 if (res.acl_flags & NFS4_ACL_TRUNC) { 4475 /* Did the user only issue a request for the acl length? */ 4476 if (buf == NULL) 4477 goto out_ok; 4478 ret = -ERANGE; 4479 goto out_free; 4480 } 4481 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 4482 if (buf) { 4483 if (res.acl_len > buflen) { 4484 ret = -ERANGE; 4485 goto out_free; 4486 } 4487 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 4488 } 4489 out_ok: 4490 ret = res.acl_len; 4491 out_free: 4492 for (i = 0; i < npages; i++) 4493 if (pages[i]) 4494 __free_page(pages[i]); 4495 if (res.acl_scratch) 4496 __free_page(res.acl_scratch); 4497 return ret; 4498 } 4499 4500 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 4501 { 4502 struct nfs4_exception exception = { }; 4503 ssize_t ret; 4504 do { 4505 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 4506 trace_nfs4_get_acl(inode, ret); 4507 if (ret >= 0) 4508 break; 4509 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 4510 } while (exception.retry); 4511 return ret; 4512 } 4513 4514 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 4515 { 4516 struct nfs_server *server = NFS_SERVER(inode); 4517 int ret; 4518 4519 if (!nfs4_server_supports_acls(server)) 4520 return -EOPNOTSUPP; 4521 ret = nfs_revalidate_inode(server, inode); 4522 if (ret < 0) 4523 return ret; 4524 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 4525 nfs_zap_acl_cache(inode); 4526 ret = nfs4_read_cached_acl(inode, buf, buflen); 4527 if (ret != -ENOENT) 4528 /* -ENOENT is returned if there is no ACL or if there is an ACL 4529 * but no cached acl data, just the acl length */ 4530 return ret; 4531 return nfs4_get_acl_uncached(inode, buf, buflen); 4532 } 4533 4534 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 4535 { 4536 struct nfs_server *server = NFS_SERVER(inode); 4537 struct page *pages[NFS4ACL_MAXPAGES]; 4538 struct nfs_setaclargs arg = { 4539 .fh = NFS_FH(inode), 4540 .acl_pages = pages, 4541 .acl_len = buflen, 4542 }; 4543 struct nfs_setaclres res; 4544 struct rpc_message msg = { 4545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 4546 .rpc_argp = &arg, 4547 .rpc_resp = &res, 4548 }; 4549 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 4550 int ret, i; 4551 4552 if (!nfs4_server_supports_acls(server)) 4553 return -EOPNOTSUPP; 4554 if (npages > ARRAY_SIZE(pages)) 4555 return -ERANGE; 4556 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase); 4557 if (i < 0) 4558 return i; 4559 nfs4_inode_return_delegation(inode); 4560 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4561 4562 /* 4563 * Free each page after tx, so the only ref left is 4564 * held by the network stack 4565 */ 4566 for (; i > 0; i--) 4567 put_page(pages[i-1]); 4568 4569 /* 4570 * Acl update can result in inode attribute update. 4571 * so mark the attribute cache invalid. 4572 */ 4573 spin_lock(&inode->i_lock); 4574 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; 4575 spin_unlock(&inode->i_lock); 4576 nfs_access_zap_cache(inode); 4577 nfs_zap_acl_cache(inode); 4578 return ret; 4579 } 4580 4581 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 4582 { 4583 struct nfs4_exception exception = { }; 4584 int err; 4585 do { 4586 err = __nfs4_proc_set_acl(inode, buf, buflen); 4587 trace_nfs4_set_acl(inode, err); 4588 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4589 &exception); 4590 } while (exception.retry); 4591 return err; 4592 } 4593 4594 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 4595 static int _nfs4_get_security_label(struct inode *inode, void *buf, 4596 size_t buflen) 4597 { 4598 struct nfs_server *server = NFS_SERVER(inode); 4599 struct nfs_fattr fattr; 4600 struct nfs4_label label = {0, 0, buflen, buf}; 4601 4602 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 4603 struct nfs4_getattr_arg arg = { 4604 .fh = NFS_FH(inode), 4605 .bitmask = bitmask, 4606 }; 4607 struct nfs4_getattr_res res = { 4608 .fattr = &fattr, 4609 .label = &label, 4610 .server = server, 4611 }; 4612 struct rpc_message msg = { 4613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 4614 .rpc_argp = &arg, 4615 .rpc_resp = &res, 4616 }; 4617 int ret; 4618 4619 nfs_fattr_init(&fattr); 4620 4621 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 4622 if (ret) 4623 return ret; 4624 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 4625 return -ENOENT; 4626 if (buflen < label.len) 4627 return -ERANGE; 4628 return 0; 4629 } 4630 4631 static int nfs4_get_security_label(struct inode *inode, void *buf, 4632 size_t buflen) 4633 { 4634 struct nfs4_exception exception = { }; 4635 int err; 4636 4637 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 4638 return -EOPNOTSUPP; 4639 4640 do { 4641 err = _nfs4_get_security_label(inode, buf, buflen); 4642 trace_nfs4_get_security_label(inode, err); 4643 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4644 &exception); 4645 } while (exception.retry); 4646 return err; 4647 } 4648 4649 static int _nfs4_do_set_security_label(struct inode *inode, 4650 struct nfs4_label *ilabel, 4651 struct nfs_fattr *fattr, 4652 struct nfs4_label *olabel) 4653 { 4654 4655 struct iattr sattr = {0}; 4656 struct nfs_server *server = NFS_SERVER(inode); 4657 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 4658 struct nfs_setattrargs arg = { 4659 .fh = NFS_FH(inode), 4660 .iap = &sattr, 4661 .server = server, 4662 .bitmask = bitmask, 4663 .label = ilabel, 4664 }; 4665 struct nfs_setattrres res = { 4666 .fattr = fattr, 4667 .label = olabel, 4668 .server = server, 4669 }; 4670 struct rpc_message msg = { 4671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 4672 .rpc_argp = &arg, 4673 .rpc_resp = &res, 4674 }; 4675 int status; 4676 4677 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 4678 4679 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4680 if (status) 4681 dprintk("%s failed: %d\n", __func__, status); 4682 4683 return status; 4684 } 4685 4686 static int nfs4_do_set_security_label(struct inode *inode, 4687 struct nfs4_label *ilabel, 4688 struct nfs_fattr *fattr, 4689 struct nfs4_label *olabel) 4690 { 4691 struct nfs4_exception exception = { }; 4692 int err; 4693 4694 do { 4695 err = _nfs4_do_set_security_label(inode, ilabel, 4696 fattr, olabel); 4697 trace_nfs4_set_security_label(inode, err); 4698 err = nfs4_handle_exception(NFS_SERVER(inode), err, 4699 &exception); 4700 } while (exception.retry); 4701 return err; 4702 } 4703 4704 static int 4705 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen) 4706 { 4707 struct nfs4_label ilabel, *olabel = NULL; 4708 struct nfs_fattr fattr; 4709 struct rpc_cred *cred; 4710 struct inode *inode = dentry->d_inode; 4711 int status; 4712 4713 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 4714 return -EOPNOTSUPP; 4715 4716 nfs_fattr_init(&fattr); 4717 4718 ilabel.pi = 0; 4719 ilabel.lfs = 0; 4720 ilabel.label = (char *)buf; 4721 ilabel.len = buflen; 4722 4723 cred = rpc_lookup_cred(); 4724 if (IS_ERR(cred)) 4725 return PTR_ERR(cred); 4726 4727 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 4728 if (IS_ERR(olabel)) { 4729 status = -PTR_ERR(olabel); 4730 goto out; 4731 } 4732 4733 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); 4734 if (status == 0) 4735 nfs_setsecurity(inode, &fattr, olabel); 4736 4737 nfs4_label_free(olabel); 4738 out: 4739 put_rpccred(cred); 4740 return status; 4741 } 4742 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 4743 4744 4745 static int 4746 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) 4747 { 4748 struct nfs_client *clp = server->nfs_client; 4749 4750 if (task->tk_status >= 0) 4751 return 0; 4752 switch(task->tk_status) { 4753 case -NFS4ERR_DELEG_REVOKED: 4754 case -NFS4ERR_ADMIN_REVOKED: 4755 case -NFS4ERR_BAD_STATEID: 4756 if (state == NULL) 4757 break; 4758 nfs_remove_bad_delegation(state->inode); 4759 case -NFS4ERR_OPENMODE: 4760 if (state == NULL) 4761 break; 4762 if (nfs4_schedule_stateid_recovery(server, state) < 0) 4763 goto recovery_failed; 4764 goto wait_on_recovery; 4765 case -NFS4ERR_EXPIRED: 4766 if (state != NULL) { 4767 if (nfs4_schedule_stateid_recovery(server, state) < 0) 4768 goto recovery_failed; 4769 } 4770 case -NFS4ERR_STALE_STATEID: 4771 case -NFS4ERR_STALE_CLIENTID: 4772 nfs4_schedule_lease_recovery(clp); 4773 goto wait_on_recovery; 4774 case -NFS4ERR_MOVED: 4775 if (nfs4_schedule_migration_recovery(server) < 0) 4776 goto recovery_failed; 4777 goto wait_on_recovery; 4778 case -NFS4ERR_LEASE_MOVED: 4779 nfs4_schedule_lease_moved_recovery(clp); 4780 goto wait_on_recovery; 4781 #if defined(CONFIG_NFS_V4_1) 4782 case -NFS4ERR_BADSESSION: 4783 case -NFS4ERR_BADSLOT: 4784 case -NFS4ERR_BAD_HIGH_SLOT: 4785 case -NFS4ERR_DEADSESSION: 4786 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 4787 case -NFS4ERR_SEQ_FALSE_RETRY: 4788 case -NFS4ERR_SEQ_MISORDERED: 4789 dprintk("%s ERROR %d, Reset session\n", __func__, 4790 task->tk_status); 4791 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status); 4792 goto wait_on_recovery; 4793 #endif /* CONFIG_NFS_V4_1 */ 4794 case -NFS4ERR_DELAY: 4795 nfs_inc_server_stats(server, NFSIOS_DELAY); 4796 case -NFS4ERR_GRACE: 4797 rpc_delay(task, NFS4_POLL_RETRY_MAX); 4798 case -NFS4ERR_RETRY_UNCACHED_REP: 4799 case -NFS4ERR_OLD_STATEID: 4800 goto restart_call; 4801 } 4802 task->tk_status = nfs4_map_errors(task->tk_status); 4803 return 0; 4804 recovery_failed: 4805 task->tk_status = -EIO; 4806 return 0; 4807 wait_on_recovery: 4808 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 4809 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 4810 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 4811 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 4812 goto recovery_failed; 4813 restart_call: 4814 task->tk_status = 0; 4815 return -EAGAIN; 4816 } 4817 4818 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 4819 nfs4_verifier *bootverf) 4820 { 4821 __be32 verf[2]; 4822 4823 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 4824 /* An impossible timestamp guarantees this value 4825 * will never match a generated boot time. */ 4826 verf[0] = 0; 4827 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1); 4828 } else { 4829 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 4830 verf[0] = cpu_to_be32(nn->boot_time.tv_sec); 4831 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec); 4832 } 4833 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 4834 } 4835 4836 static unsigned int 4837 nfs4_init_nonuniform_client_string(const struct nfs_client *clp, 4838 char *buf, size_t len) 4839 { 4840 unsigned int result; 4841 4842 rcu_read_lock(); 4843 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s", 4844 clp->cl_ipaddr, 4845 rpc_peeraddr2str(clp->cl_rpcclient, 4846 RPC_DISPLAY_ADDR), 4847 rpc_peeraddr2str(clp->cl_rpcclient, 4848 RPC_DISPLAY_PROTO)); 4849 rcu_read_unlock(); 4850 return result; 4851 } 4852 4853 static unsigned int 4854 nfs4_init_uniform_client_string(const struct nfs_client *clp, 4855 char *buf, size_t len) 4856 { 4857 const char *nodename = clp->cl_rpcclient->cl_nodename; 4858 4859 if (nfs4_client_id_uniquifier[0] != '\0') 4860 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s", 4861 clp->rpc_ops->version, 4862 clp->cl_minorversion, 4863 nfs4_client_id_uniquifier, 4864 nodename); 4865 return scnprintf(buf, len, "Linux NFSv%u.%u %s", 4866 clp->rpc_ops->version, clp->cl_minorversion, 4867 nodename); 4868 } 4869 4870 /* 4871 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 4872 * services. Advertise one based on the address family of the 4873 * clientaddr. 4874 */ 4875 static unsigned int 4876 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 4877 { 4878 if (strchr(clp->cl_ipaddr, ':') != NULL) 4879 return scnprintf(buf, len, "tcp6"); 4880 else 4881 return scnprintf(buf, len, "tcp"); 4882 } 4883 4884 /** 4885 * nfs4_proc_setclientid - Negotiate client ID 4886 * @clp: state data structure 4887 * @program: RPC program for NFSv4 callback service 4888 * @port: IP port number for NFS4 callback service 4889 * @cred: RPC credential to use for this call 4890 * @res: where to place the result 4891 * 4892 * Returns zero, a negative errno, or a negative NFS4ERR status code. 4893 */ 4894 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 4895 unsigned short port, struct rpc_cred *cred, 4896 struct nfs4_setclientid_res *res) 4897 { 4898 nfs4_verifier sc_verifier; 4899 struct nfs4_setclientid setclientid = { 4900 .sc_verifier = &sc_verifier, 4901 .sc_prog = program, 4902 .sc_cb_ident = clp->cl_cb_ident, 4903 }; 4904 struct rpc_message msg = { 4905 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 4906 .rpc_argp = &setclientid, 4907 .rpc_resp = res, 4908 .rpc_cred = cred, 4909 }; 4910 int status; 4911 4912 /* nfs_client_id4 */ 4913 nfs4_init_boot_verifier(clp, &sc_verifier); 4914 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 4915 setclientid.sc_name_len = 4916 nfs4_init_uniform_client_string(clp, 4917 setclientid.sc_name, 4918 sizeof(setclientid.sc_name)); 4919 else 4920 setclientid.sc_name_len = 4921 nfs4_init_nonuniform_client_string(clp, 4922 setclientid.sc_name, 4923 sizeof(setclientid.sc_name)); 4924 /* cb_client4 */ 4925 setclientid.sc_netid_len = 4926 nfs4_init_callback_netid(clp, 4927 setclientid.sc_netid, 4928 sizeof(setclientid.sc_netid)); 4929 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 4930 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 4931 clp->cl_ipaddr, port >> 8, port & 255); 4932 4933 dprintk("NFS call setclientid auth=%s, '%.*s'\n", 4934 clp->cl_rpcclient->cl_auth->au_ops->au_name, 4935 setclientid.sc_name_len, setclientid.sc_name); 4936 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 4937 trace_nfs4_setclientid(clp, status); 4938 dprintk("NFS reply setclientid: %d\n", status); 4939 return status; 4940 } 4941 4942 /** 4943 * nfs4_proc_setclientid_confirm - Confirm client ID 4944 * @clp: state data structure 4945 * @res: result of a previous SETCLIENTID 4946 * @cred: RPC credential to use for this call 4947 * 4948 * Returns zero, a negative errno, or a negative NFS4ERR status code. 4949 */ 4950 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 4951 struct nfs4_setclientid_res *arg, 4952 struct rpc_cred *cred) 4953 { 4954 struct rpc_message msg = { 4955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 4956 .rpc_argp = arg, 4957 .rpc_cred = cred, 4958 }; 4959 int status; 4960 4961 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 4962 clp->cl_rpcclient->cl_auth->au_ops->au_name, 4963 clp->cl_clientid); 4964 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 4965 trace_nfs4_setclientid_confirm(clp, status); 4966 dprintk("NFS reply setclientid_confirm: %d\n", status); 4967 return status; 4968 } 4969 4970 struct nfs4_delegreturndata { 4971 struct nfs4_delegreturnargs args; 4972 struct nfs4_delegreturnres res; 4973 struct nfs_fh fh; 4974 nfs4_stateid stateid; 4975 unsigned long timestamp; 4976 struct nfs_fattr fattr; 4977 int rpc_status; 4978 }; 4979 4980 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 4981 { 4982 struct nfs4_delegreturndata *data = calldata; 4983 4984 if (!nfs4_sequence_done(task, &data->res.seq_res)) 4985 return; 4986 4987 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 4988 switch (task->tk_status) { 4989 case 0: 4990 renew_lease(data->res.server, data->timestamp); 4991 break; 4992 case -NFS4ERR_ADMIN_REVOKED: 4993 case -NFS4ERR_DELEG_REVOKED: 4994 case -NFS4ERR_BAD_STATEID: 4995 case -NFS4ERR_OLD_STATEID: 4996 case -NFS4ERR_STALE_STATEID: 4997 case -NFS4ERR_EXPIRED: 4998 task->tk_status = 0; 4999 break; 5000 default: 5001 if (nfs4_async_handle_error(task, data->res.server, NULL) == 5002 -EAGAIN) { 5003 rpc_restart_call_prepare(task); 5004 return; 5005 } 5006 } 5007 data->rpc_status = task->tk_status; 5008 } 5009 5010 static void nfs4_delegreturn_release(void *calldata) 5011 { 5012 kfree(calldata); 5013 } 5014 5015 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 5016 { 5017 struct nfs4_delegreturndata *d_data; 5018 5019 d_data = (struct nfs4_delegreturndata *)data; 5020 5021 nfs4_setup_sequence(d_data->res.server, 5022 &d_data->args.seq_args, 5023 &d_data->res.seq_res, 5024 task); 5025 } 5026 5027 static const struct rpc_call_ops nfs4_delegreturn_ops = { 5028 .rpc_call_prepare = nfs4_delegreturn_prepare, 5029 .rpc_call_done = nfs4_delegreturn_done, 5030 .rpc_release = nfs4_delegreturn_release, 5031 }; 5032 5033 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 5034 { 5035 struct nfs4_delegreturndata *data; 5036 struct nfs_server *server = NFS_SERVER(inode); 5037 struct rpc_task *task; 5038 struct rpc_message msg = { 5039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 5040 .rpc_cred = cred, 5041 }; 5042 struct rpc_task_setup task_setup_data = { 5043 .rpc_client = server->client, 5044 .rpc_message = &msg, 5045 .callback_ops = &nfs4_delegreturn_ops, 5046 .flags = RPC_TASK_ASYNC, 5047 }; 5048 int status = 0; 5049 5050 data = kzalloc(sizeof(*data), GFP_NOFS); 5051 if (data == NULL) 5052 return -ENOMEM; 5053 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 5054 data->args.fhandle = &data->fh; 5055 data->args.stateid = &data->stateid; 5056 data->args.bitmask = server->cache_consistency_bitmask; 5057 nfs_copy_fh(&data->fh, NFS_FH(inode)); 5058 nfs4_stateid_copy(&data->stateid, stateid); 5059 data->res.fattr = &data->fattr; 5060 data->res.server = server; 5061 nfs_fattr_init(data->res.fattr); 5062 data->timestamp = jiffies; 5063 data->rpc_status = 0; 5064 5065 task_setup_data.callback_data = data; 5066 msg.rpc_argp = &data->args; 5067 msg.rpc_resp = &data->res; 5068 task = rpc_run_task(&task_setup_data); 5069 if (IS_ERR(task)) 5070 return PTR_ERR(task); 5071 if (!issync) 5072 goto out; 5073 status = nfs4_wait_for_completion_rpc_task(task); 5074 if (status != 0) 5075 goto out; 5076 status = data->rpc_status; 5077 if (status == 0) 5078 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 5079 else 5080 nfs_refresh_inode(inode, &data->fattr); 5081 out: 5082 rpc_put_task(task); 5083 return status; 5084 } 5085 5086 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 5087 { 5088 struct nfs_server *server = NFS_SERVER(inode); 5089 struct nfs4_exception exception = { }; 5090 int err; 5091 do { 5092 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 5093 trace_nfs4_delegreturn(inode, err); 5094 switch (err) { 5095 case -NFS4ERR_STALE_STATEID: 5096 case -NFS4ERR_EXPIRED: 5097 case 0: 5098 return 0; 5099 } 5100 err = nfs4_handle_exception(server, err, &exception); 5101 } while (exception.retry); 5102 return err; 5103 } 5104 5105 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 5106 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 5107 5108 /* 5109 * sleep, with exponential backoff, and retry the LOCK operation. 5110 */ 5111 static unsigned long 5112 nfs4_set_lock_task_retry(unsigned long timeout) 5113 { 5114 freezable_schedule_timeout_killable_unsafe(timeout); 5115 timeout <<= 1; 5116 if (timeout > NFS4_LOCK_MAXTIMEOUT) 5117 return NFS4_LOCK_MAXTIMEOUT; 5118 return timeout; 5119 } 5120 5121 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5122 { 5123 struct inode *inode = state->inode; 5124 struct nfs_server *server = NFS_SERVER(inode); 5125 struct nfs_client *clp = server->nfs_client; 5126 struct nfs_lockt_args arg = { 5127 .fh = NFS_FH(inode), 5128 .fl = request, 5129 }; 5130 struct nfs_lockt_res res = { 5131 .denied = request, 5132 }; 5133 struct rpc_message msg = { 5134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 5135 .rpc_argp = &arg, 5136 .rpc_resp = &res, 5137 .rpc_cred = state->owner->so_cred, 5138 }; 5139 struct nfs4_lock_state *lsp; 5140 int status; 5141 5142 arg.lock_owner.clientid = clp->cl_clientid; 5143 status = nfs4_set_lock_state(state, request); 5144 if (status != 0) 5145 goto out; 5146 lsp = request->fl_u.nfs4_fl.owner; 5147 arg.lock_owner.id = lsp->ls_seqid.owner_id; 5148 arg.lock_owner.s_dev = server->s_dev; 5149 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5150 switch (status) { 5151 case 0: 5152 request->fl_type = F_UNLCK; 5153 break; 5154 case -NFS4ERR_DENIED: 5155 status = 0; 5156 } 5157 request->fl_ops->fl_release_private(request); 5158 request->fl_ops = NULL; 5159 out: 5160 return status; 5161 } 5162 5163 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5164 { 5165 struct nfs4_exception exception = { }; 5166 int err; 5167 5168 do { 5169 err = _nfs4_proc_getlk(state, cmd, request); 5170 trace_nfs4_get_lock(request, state, cmd, err); 5171 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 5172 &exception); 5173 } while (exception.retry); 5174 return err; 5175 } 5176 5177 static int do_vfs_lock(struct file *file, struct file_lock *fl) 5178 { 5179 int res = 0; 5180 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) { 5181 case FL_POSIX: 5182 res = posix_lock_file_wait(file, fl); 5183 break; 5184 case FL_FLOCK: 5185 res = flock_lock_file_wait(file, fl); 5186 break; 5187 default: 5188 BUG(); 5189 } 5190 return res; 5191 } 5192 5193 struct nfs4_unlockdata { 5194 struct nfs_locku_args arg; 5195 struct nfs_locku_res res; 5196 struct nfs4_lock_state *lsp; 5197 struct nfs_open_context *ctx; 5198 struct file_lock fl; 5199 const struct nfs_server *server; 5200 unsigned long timestamp; 5201 }; 5202 5203 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 5204 struct nfs_open_context *ctx, 5205 struct nfs4_lock_state *lsp, 5206 struct nfs_seqid *seqid) 5207 { 5208 struct nfs4_unlockdata *p; 5209 struct inode *inode = lsp->ls_state->inode; 5210 5211 p = kzalloc(sizeof(*p), GFP_NOFS); 5212 if (p == NULL) 5213 return NULL; 5214 p->arg.fh = NFS_FH(inode); 5215 p->arg.fl = &p->fl; 5216 p->arg.seqid = seqid; 5217 p->res.seqid = seqid; 5218 p->arg.stateid = &lsp->ls_stateid; 5219 p->lsp = lsp; 5220 atomic_inc(&lsp->ls_count); 5221 /* Ensure we don't close file until we're done freeing locks! */ 5222 p->ctx = get_nfs_open_context(ctx); 5223 memcpy(&p->fl, fl, sizeof(p->fl)); 5224 p->server = NFS_SERVER(inode); 5225 return p; 5226 } 5227 5228 static void nfs4_locku_release_calldata(void *data) 5229 { 5230 struct nfs4_unlockdata *calldata = data; 5231 nfs_free_seqid(calldata->arg.seqid); 5232 nfs4_put_lock_state(calldata->lsp); 5233 put_nfs_open_context(calldata->ctx); 5234 kfree(calldata); 5235 } 5236 5237 static void nfs4_locku_done(struct rpc_task *task, void *data) 5238 { 5239 struct nfs4_unlockdata *calldata = data; 5240 5241 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 5242 return; 5243 switch (task->tk_status) { 5244 case 0: 5245 nfs4_stateid_copy(&calldata->lsp->ls_stateid, 5246 &calldata->res.stateid); 5247 renew_lease(calldata->server, calldata->timestamp); 5248 break; 5249 case -NFS4ERR_BAD_STATEID: 5250 case -NFS4ERR_OLD_STATEID: 5251 case -NFS4ERR_STALE_STATEID: 5252 case -NFS4ERR_EXPIRED: 5253 break; 5254 default: 5255 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN) 5256 rpc_restart_call_prepare(task); 5257 } 5258 nfs_release_seqid(calldata->arg.seqid); 5259 } 5260 5261 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 5262 { 5263 struct nfs4_unlockdata *calldata = data; 5264 5265 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 5266 goto out_wait; 5267 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 5268 /* Note: exit _without_ running nfs4_locku_done */ 5269 goto out_no_action; 5270 } 5271 calldata->timestamp = jiffies; 5272 if (nfs4_setup_sequence(calldata->server, 5273 &calldata->arg.seq_args, 5274 &calldata->res.seq_res, 5275 task) != 0) 5276 nfs_release_seqid(calldata->arg.seqid); 5277 return; 5278 out_no_action: 5279 task->tk_action = NULL; 5280 out_wait: 5281 nfs4_sequence_done(task, &calldata->res.seq_res); 5282 } 5283 5284 static const struct rpc_call_ops nfs4_locku_ops = { 5285 .rpc_call_prepare = nfs4_locku_prepare, 5286 .rpc_call_done = nfs4_locku_done, 5287 .rpc_release = nfs4_locku_release_calldata, 5288 }; 5289 5290 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 5291 struct nfs_open_context *ctx, 5292 struct nfs4_lock_state *lsp, 5293 struct nfs_seqid *seqid) 5294 { 5295 struct nfs4_unlockdata *data; 5296 struct rpc_message msg = { 5297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 5298 .rpc_cred = ctx->cred, 5299 }; 5300 struct rpc_task_setup task_setup_data = { 5301 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 5302 .rpc_message = &msg, 5303 .callback_ops = &nfs4_locku_ops, 5304 .workqueue = nfsiod_workqueue, 5305 .flags = RPC_TASK_ASYNC, 5306 }; 5307 5308 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 5309 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 5310 5311 /* Ensure this is an unlock - when canceling a lock, the 5312 * canceled lock is passed in, and it won't be an unlock. 5313 */ 5314 fl->fl_type = F_UNLCK; 5315 5316 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 5317 if (data == NULL) { 5318 nfs_free_seqid(seqid); 5319 return ERR_PTR(-ENOMEM); 5320 } 5321 5322 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); 5323 msg.rpc_argp = &data->arg; 5324 msg.rpc_resp = &data->res; 5325 task_setup_data.callback_data = data; 5326 return rpc_run_task(&task_setup_data); 5327 } 5328 5329 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 5330 { 5331 struct inode *inode = state->inode; 5332 struct nfs4_state_owner *sp = state->owner; 5333 struct nfs_inode *nfsi = NFS_I(inode); 5334 struct nfs_seqid *seqid; 5335 struct nfs4_lock_state *lsp; 5336 struct rpc_task *task; 5337 int status = 0; 5338 unsigned char fl_flags = request->fl_flags; 5339 5340 status = nfs4_set_lock_state(state, request); 5341 /* Unlock _before_ we do the RPC call */ 5342 request->fl_flags |= FL_EXISTS; 5343 /* Exclude nfs_delegation_claim_locks() */ 5344 mutex_lock(&sp->so_delegreturn_mutex); 5345 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 5346 down_read(&nfsi->rwsem); 5347 if (do_vfs_lock(request->fl_file, request) == -ENOENT) { 5348 up_read(&nfsi->rwsem); 5349 mutex_unlock(&sp->so_delegreturn_mutex); 5350 goto out; 5351 } 5352 up_read(&nfsi->rwsem); 5353 mutex_unlock(&sp->so_delegreturn_mutex); 5354 if (status != 0) 5355 goto out; 5356 /* Is this a delegated lock? */ 5357 lsp = request->fl_u.nfs4_fl.owner; 5358 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 5359 goto out; 5360 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 5361 status = -ENOMEM; 5362 if (seqid == NULL) 5363 goto out; 5364 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 5365 status = PTR_ERR(task); 5366 if (IS_ERR(task)) 5367 goto out; 5368 status = nfs4_wait_for_completion_rpc_task(task); 5369 rpc_put_task(task); 5370 out: 5371 request->fl_flags = fl_flags; 5372 trace_nfs4_unlock(request, state, F_SETLK, status); 5373 return status; 5374 } 5375 5376 struct nfs4_lockdata { 5377 struct nfs_lock_args arg; 5378 struct nfs_lock_res res; 5379 struct nfs4_lock_state *lsp; 5380 struct nfs_open_context *ctx; 5381 struct file_lock fl; 5382 unsigned long timestamp; 5383 int rpc_status; 5384 int cancelled; 5385 struct nfs_server *server; 5386 }; 5387 5388 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 5389 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 5390 gfp_t gfp_mask) 5391 { 5392 struct nfs4_lockdata *p; 5393 struct inode *inode = lsp->ls_state->inode; 5394 struct nfs_server *server = NFS_SERVER(inode); 5395 5396 p = kzalloc(sizeof(*p), gfp_mask); 5397 if (p == NULL) 5398 return NULL; 5399 5400 p->arg.fh = NFS_FH(inode); 5401 p->arg.fl = &p->fl; 5402 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 5403 if (p->arg.open_seqid == NULL) 5404 goto out_free; 5405 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask); 5406 if (p->arg.lock_seqid == NULL) 5407 goto out_free_seqid; 5408 p->arg.lock_stateid = &lsp->ls_stateid; 5409 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 5410 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 5411 p->arg.lock_owner.s_dev = server->s_dev; 5412 p->res.lock_seqid = p->arg.lock_seqid; 5413 p->lsp = lsp; 5414 p->server = server; 5415 atomic_inc(&lsp->ls_count); 5416 p->ctx = get_nfs_open_context(ctx); 5417 memcpy(&p->fl, fl, sizeof(p->fl)); 5418 return p; 5419 out_free_seqid: 5420 nfs_free_seqid(p->arg.open_seqid); 5421 out_free: 5422 kfree(p); 5423 return NULL; 5424 } 5425 5426 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 5427 { 5428 struct nfs4_lockdata *data = calldata; 5429 struct nfs4_state *state = data->lsp->ls_state; 5430 5431 dprintk("%s: begin!\n", __func__); 5432 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 5433 goto out_wait; 5434 /* Do we need to do an open_to_lock_owner? */ 5435 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) { 5436 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 5437 goto out_release_lock_seqid; 5438 } 5439 data->arg.open_stateid = &state->open_stateid; 5440 data->arg.new_lock_owner = 1; 5441 data->res.open_seqid = data->arg.open_seqid; 5442 } else 5443 data->arg.new_lock_owner = 0; 5444 if (!nfs4_valid_open_stateid(state)) { 5445 data->rpc_status = -EBADF; 5446 task->tk_action = NULL; 5447 goto out_release_open_seqid; 5448 } 5449 data->timestamp = jiffies; 5450 if (nfs4_setup_sequence(data->server, 5451 &data->arg.seq_args, 5452 &data->res.seq_res, 5453 task) == 0) 5454 return; 5455 out_release_open_seqid: 5456 nfs_release_seqid(data->arg.open_seqid); 5457 out_release_lock_seqid: 5458 nfs_release_seqid(data->arg.lock_seqid); 5459 out_wait: 5460 nfs4_sequence_done(task, &data->res.seq_res); 5461 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 5462 } 5463 5464 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 5465 { 5466 struct nfs4_lockdata *data = calldata; 5467 5468 dprintk("%s: begin!\n", __func__); 5469 5470 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5471 return; 5472 5473 data->rpc_status = task->tk_status; 5474 if (data->arg.new_lock_owner != 0) { 5475 if (data->rpc_status == 0) 5476 nfs_confirm_seqid(&data->lsp->ls_seqid, 0); 5477 else 5478 goto out; 5479 } 5480 if (data->rpc_status == 0) { 5481 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid); 5482 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags); 5483 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp); 5484 } 5485 out: 5486 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 5487 } 5488 5489 static void nfs4_lock_release(void *calldata) 5490 { 5491 struct nfs4_lockdata *data = calldata; 5492 5493 dprintk("%s: begin!\n", __func__); 5494 nfs_free_seqid(data->arg.open_seqid); 5495 if (data->cancelled != 0) { 5496 struct rpc_task *task; 5497 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 5498 data->arg.lock_seqid); 5499 if (!IS_ERR(task)) 5500 rpc_put_task_async(task); 5501 dprintk("%s: cancelling lock!\n", __func__); 5502 } else 5503 nfs_free_seqid(data->arg.lock_seqid); 5504 nfs4_put_lock_state(data->lsp); 5505 put_nfs_open_context(data->ctx); 5506 kfree(data); 5507 dprintk("%s: done!\n", __func__); 5508 } 5509 5510 static const struct rpc_call_ops nfs4_lock_ops = { 5511 .rpc_call_prepare = nfs4_lock_prepare, 5512 .rpc_call_done = nfs4_lock_done, 5513 .rpc_release = nfs4_lock_release, 5514 }; 5515 5516 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 5517 { 5518 switch (error) { 5519 case -NFS4ERR_ADMIN_REVOKED: 5520 case -NFS4ERR_BAD_STATEID: 5521 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 5522 if (new_lock_owner != 0 || 5523 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 5524 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 5525 break; 5526 case -NFS4ERR_STALE_STATEID: 5527 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 5528 case -NFS4ERR_EXPIRED: 5529 nfs4_schedule_lease_recovery(server->nfs_client); 5530 }; 5531 } 5532 5533 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 5534 { 5535 struct nfs4_lockdata *data; 5536 struct rpc_task *task; 5537 struct rpc_message msg = { 5538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 5539 .rpc_cred = state->owner->so_cred, 5540 }; 5541 struct rpc_task_setup task_setup_data = { 5542 .rpc_client = NFS_CLIENT(state->inode), 5543 .rpc_message = &msg, 5544 .callback_ops = &nfs4_lock_ops, 5545 .workqueue = nfsiod_workqueue, 5546 .flags = RPC_TASK_ASYNC, 5547 }; 5548 int ret; 5549 5550 dprintk("%s: begin!\n", __func__); 5551 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 5552 fl->fl_u.nfs4_fl.owner, 5553 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 5554 if (data == NULL) 5555 return -ENOMEM; 5556 if (IS_SETLKW(cmd)) 5557 data->arg.block = 1; 5558 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); 5559 msg.rpc_argp = &data->arg; 5560 msg.rpc_resp = &data->res; 5561 task_setup_data.callback_data = data; 5562 if (recovery_type > NFS_LOCK_NEW) { 5563 if (recovery_type == NFS_LOCK_RECLAIM) 5564 data->arg.reclaim = NFS_LOCK_RECLAIM; 5565 nfs4_set_sequence_privileged(&data->arg.seq_args); 5566 } 5567 task = rpc_run_task(&task_setup_data); 5568 if (IS_ERR(task)) 5569 return PTR_ERR(task); 5570 ret = nfs4_wait_for_completion_rpc_task(task); 5571 if (ret == 0) { 5572 ret = data->rpc_status; 5573 if (ret) 5574 nfs4_handle_setlk_error(data->server, data->lsp, 5575 data->arg.new_lock_owner, ret); 5576 } else 5577 data->cancelled = 1; 5578 rpc_put_task(task); 5579 dprintk("%s: done, ret = %d!\n", __func__, ret); 5580 return ret; 5581 } 5582 5583 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 5584 { 5585 struct nfs_server *server = NFS_SERVER(state->inode); 5586 struct nfs4_exception exception = { 5587 .inode = state->inode, 5588 }; 5589 int err; 5590 5591 do { 5592 /* Cache the lock if possible... */ 5593 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 5594 return 0; 5595 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 5596 trace_nfs4_lock_reclaim(request, state, F_SETLK, err); 5597 if (err != -NFS4ERR_DELAY) 5598 break; 5599 nfs4_handle_exception(server, err, &exception); 5600 } while (exception.retry); 5601 return err; 5602 } 5603 5604 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 5605 { 5606 struct nfs_server *server = NFS_SERVER(state->inode); 5607 struct nfs4_exception exception = { 5608 .inode = state->inode, 5609 }; 5610 int err; 5611 5612 err = nfs4_set_lock_state(state, request); 5613 if (err != 0) 5614 return err; 5615 if (!recover_lost_locks) { 5616 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 5617 return 0; 5618 } 5619 do { 5620 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 5621 return 0; 5622 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 5623 trace_nfs4_lock_expired(request, state, F_SETLK, err); 5624 switch (err) { 5625 default: 5626 goto out; 5627 case -NFS4ERR_GRACE: 5628 case -NFS4ERR_DELAY: 5629 nfs4_handle_exception(server, err, &exception); 5630 err = 0; 5631 } 5632 } while (exception.retry); 5633 out: 5634 return err; 5635 } 5636 5637 #if defined(CONFIG_NFS_V4_1) 5638 /** 5639 * nfs41_check_expired_locks - possibly free a lock stateid 5640 * 5641 * @state: NFSv4 state for an inode 5642 * 5643 * Returns NFS_OK if recovery for this stateid is now finished. 5644 * Otherwise a negative NFS4ERR value is returned. 5645 */ 5646 static int nfs41_check_expired_locks(struct nfs4_state *state) 5647 { 5648 int status, ret = -NFS4ERR_BAD_STATEID; 5649 struct nfs4_lock_state *lsp; 5650 struct nfs_server *server = NFS_SERVER(state->inode); 5651 5652 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 5653 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 5654 struct rpc_cred *cred = lsp->ls_state->owner->so_cred; 5655 5656 status = nfs41_test_stateid(server, 5657 &lsp->ls_stateid, 5658 cred); 5659 trace_nfs4_test_lock_stateid(state, lsp, status); 5660 if (status != NFS_OK) { 5661 /* Free the stateid unless the server 5662 * informs us the stateid is unrecognized. */ 5663 if (status != -NFS4ERR_BAD_STATEID) 5664 nfs41_free_stateid(server, 5665 &lsp->ls_stateid, 5666 cred); 5667 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 5668 ret = status; 5669 } 5670 } 5671 }; 5672 5673 return ret; 5674 } 5675 5676 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 5677 { 5678 int status = NFS_OK; 5679 5680 if (test_bit(LK_STATE_IN_USE, &state->flags)) 5681 status = nfs41_check_expired_locks(state); 5682 if (status != NFS_OK) 5683 status = nfs4_lock_expired(state, request); 5684 return status; 5685 } 5686 #endif 5687 5688 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5689 { 5690 struct nfs4_state_owner *sp = state->owner; 5691 struct nfs_inode *nfsi = NFS_I(state->inode); 5692 unsigned char fl_flags = request->fl_flags; 5693 unsigned int seq; 5694 int status = -ENOLCK; 5695 5696 if ((fl_flags & FL_POSIX) && 5697 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 5698 goto out; 5699 /* Is this a delegated open? */ 5700 status = nfs4_set_lock_state(state, request); 5701 if (status != 0) 5702 goto out; 5703 request->fl_flags |= FL_ACCESS; 5704 status = do_vfs_lock(request->fl_file, request); 5705 if (status < 0) 5706 goto out; 5707 down_read(&nfsi->rwsem); 5708 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 5709 /* Yes: cache locks! */ 5710 /* ...but avoid races with delegation recall... */ 5711 request->fl_flags = fl_flags & ~FL_SLEEP; 5712 status = do_vfs_lock(request->fl_file, request); 5713 goto out_unlock; 5714 } 5715 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 5716 up_read(&nfsi->rwsem); 5717 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 5718 if (status != 0) 5719 goto out; 5720 down_read(&nfsi->rwsem); 5721 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) { 5722 status = -NFS4ERR_DELAY; 5723 goto out_unlock; 5724 } 5725 /* Note: we always want to sleep here! */ 5726 request->fl_flags = fl_flags | FL_SLEEP; 5727 if (do_vfs_lock(request->fl_file, request) < 0) 5728 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock " 5729 "manager!\n", __func__); 5730 out_unlock: 5731 up_read(&nfsi->rwsem); 5732 out: 5733 request->fl_flags = fl_flags; 5734 return status; 5735 } 5736 5737 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5738 { 5739 struct nfs4_exception exception = { 5740 .state = state, 5741 .inode = state->inode, 5742 }; 5743 int err; 5744 5745 do { 5746 err = _nfs4_proc_setlk(state, cmd, request); 5747 trace_nfs4_set_lock(request, state, cmd, err); 5748 if (err == -NFS4ERR_DENIED) 5749 err = -EAGAIN; 5750 err = nfs4_handle_exception(NFS_SERVER(state->inode), 5751 err, &exception); 5752 } while (exception.retry); 5753 return err; 5754 } 5755 5756 static int 5757 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 5758 { 5759 struct nfs_open_context *ctx; 5760 struct nfs4_state *state; 5761 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 5762 int status; 5763 5764 /* verify open state */ 5765 ctx = nfs_file_open_context(filp); 5766 state = ctx->state; 5767 5768 if (request->fl_start < 0 || request->fl_end < 0) 5769 return -EINVAL; 5770 5771 if (IS_GETLK(cmd)) { 5772 if (state != NULL) 5773 return nfs4_proc_getlk(state, F_GETLK, request); 5774 return 0; 5775 } 5776 5777 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 5778 return -EINVAL; 5779 5780 if (request->fl_type == F_UNLCK) { 5781 if (state != NULL) 5782 return nfs4_proc_unlck(state, cmd, request); 5783 return 0; 5784 } 5785 5786 if (state == NULL) 5787 return -ENOLCK; 5788 /* 5789 * Don't rely on the VFS having checked the file open mode, 5790 * since it won't do this for flock() locks. 5791 */ 5792 switch (request->fl_type) { 5793 case F_RDLCK: 5794 if (!(filp->f_mode & FMODE_READ)) 5795 return -EBADF; 5796 break; 5797 case F_WRLCK: 5798 if (!(filp->f_mode & FMODE_WRITE)) 5799 return -EBADF; 5800 } 5801 5802 do { 5803 status = nfs4_proc_setlk(state, cmd, request); 5804 if ((status != -EAGAIN) || IS_SETLK(cmd)) 5805 break; 5806 timeout = nfs4_set_lock_task_retry(timeout); 5807 status = -ERESTARTSYS; 5808 if (signalled()) 5809 break; 5810 } while(status < 0); 5811 return status; 5812 } 5813 5814 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 5815 { 5816 struct nfs_server *server = NFS_SERVER(state->inode); 5817 int err; 5818 5819 err = nfs4_set_lock_state(state, fl); 5820 if (err != 0) 5821 return err; 5822 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 5823 return nfs4_handle_delegation_recall_error(server, state, stateid, err); 5824 } 5825 5826 struct nfs_release_lockowner_data { 5827 struct nfs4_lock_state *lsp; 5828 struct nfs_server *server; 5829 struct nfs_release_lockowner_args args; 5830 struct nfs_release_lockowner_res res; 5831 unsigned long timestamp; 5832 }; 5833 5834 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 5835 { 5836 struct nfs_release_lockowner_data *data = calldata; 5837 nfs40_setup_sequence(data->server, 5838 &data->args.seq_args, &data->res.seq_res, task); 5839 data->timestamp = jiffies; 5840 } 5841 5842 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 5843 { 5844 struct nfs_release_lockowner_data *data = calldata; 5845 struct nfs_server *server = data->server; 5846 5847 nfs40_sequence_done(task, &data->res.seq_res); 5848 5849 switch (task->tk_status) { 5850 case 0: 5851 renew_lease(server, data->timestamp); 5852 break; 5853 case -NFS4ERR_STALE_CLIENTID: 5854 case -NFS4ERR_EXPIRED: 5855 case -NFS4ERR_LEASE_MOVED: 5856 case -NFS4ERR_DELAY: 5857 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) 5858 rpc_restart_call_prepare(task); 5859 } 5860 } 5861 5862 static void nfs4_release_lockowner_release(void *calldata) 5863 { 5864 struct nfs_release_lockowner_data *data = calldata; 5865 nfs4_free_lock_state(data->server, data->lsp); 5866 kfree(calldata); 5867 } 5868 5869 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 5870 .rpc_call_prepare = nfs4_release_lockowner_prepare, 5871 .rpc_call_done = nfs4_release_lockowner_done, 5872 .rpc_release = nfs4_release_lockowner_release, 5873 }; 5874 5875 static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 5876 { 5877 struct nfs_release_lockowner_data *data; 5878 struct rpc_message msg = { 5879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 5880 }; 5881 5882 if (server->nfs_client->cl_mvops->minor_version != 0) 5883 return -EINVAL; 5884 5885 data = kmalloc(sizeof(*data), GFP_NOFS); 5886 if (!data) 5887 return -ENOMEM; 5888 data->lsp = lsp; 5889 data->server = server; 5890 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 5891 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 5892 data->args.lock_owner.s_dev = server->s_dev; 5893 5894 msg.rpc_argp = &data->args; 5895 msg.rpc_resp = &data->res; 5896 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 5897 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 5898 return 0; 5899 } 5900 5901 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 5902 5903 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key, 5904 const void *buf, size_t buflen, 5905 int flags, int type) 5906 { 5907 if (strcmp(key, "") != 0) 5908 return -EINVAL; 5909 5910 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen); 5911 } 5912 5913 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key, 5914 void *buf, size_t buflen, int type) 5915 { 5916 if (strcmp(key, "") != 0) 5917 return -EINVAL; 5918 5919 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen); 5920 } 5921 5922 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list, 5923 size_t list_len, const char *name, 5924 size_t name_len, int type) 5925 { 5926 size_t len = sizeof(XATTR_NAME_NFSV4_ACL); 5927 5928 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode))) 5929 return 0; 5930 5931 if (list && len <= list_len) 5932 memcpy(list, XATTR_NAME_NFSV4_ACL, len); 5933 return len; 5934 } 5935 5936 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 5937 static inline int nfs4_server_supports_labels(struct nfs_server *server) 5938 { 5939 return server->caps & NFS_CAP_SECURITY_LABEL; 5940 } 5941 5942 static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key, 5943 const void *buf, size_t buflen, 5944 int flags, int type) 5945 { 5946 if (security_ismaclabel(key)) 5947 return nfs4_set_security_label(dentry, buf, buflen); 5948 5949 return -EOPNOTSUPP; 5950 } 5951 5952 static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key, 5953 void *buf, size_t buflen, int type) 5954 { 5955 if (security_ismaclabel(key)) 5956 return nfs4_get_security_label(dentry->d_inode, buf, buflen); 5957 return -EOPNOTSUPP; 5958 } 5959 5960 static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list, 5961 size_t list_len, const char *name, 5962 size_t name_len, int type) 5963 { 5964 size_t len = 0; 5965 5966 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) { 5967 len = security_inode_listsecurity(dentry->d_inode, NULL, 0); 5968 if (list && len <= list_len) 5969 security_inode_listsecurity(dentry->d_inode, list, len); 5970 } 5971 return len; 5972 } 5973 5974 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 5975 .prefix = XATTR_SECURITY_PREFIX, 5976 .list = nfs4_xattr_list_nfs4_label, 5977 .get = nfs4_xattr_get_nfs4_label, 5978 .set = nfs4_xattr_set_nfs4_label, 5979 }; 5980 #endif 5981 5982 5983 /* 5984 * nfs_fhget will use either the mounted_on_fileid or the fileid 5985 */ 5986 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 5987 { 5988 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 5989 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 5990 (fattr->valid & NFS_ATTR_FATTR_FSID) && 5991 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 5992 return; 5993 5994 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 5995 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 5996 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 5997 fattr->nlink = 2; 5998 } 5999 6000 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 6001 const struct qstr *name, 6002 struct nfs4_fs_locations *fs_locations, 6003 struct page *page) 6004 { 6005 struct nfs_server *server = NFS_SERVER(dir); 6006 u32 bitmask[3] = { 6007 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6008 }; 6009 struct nfs4_fs_locations_arg args = { 6010 .dir_fh = NFS_FH(dir), 6011 .name = name, 6012 .page = page, 6013 .bitmask = bitmask, 6014 }; 6015 struct nfs4_fs_locations_res res = { 6016 .fs_locations = fs_locations, 6017 }; 6018 struct rpc_message msg = { 6019 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6020 .rpc_argp = &args, 6021 .rpc_resp = &res, 6022 }; 6023 int status; 6024 6025 dprintk("%s: start\n", __func__); 6026 6027 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 6028 * is not supported */ 6029 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 6030 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID; 6031 else 6032 bitmask[0] |= FATTR4_WORD0_FILEID; 6033 6034 nfs_fattr_init(&fs_locations->fattr); 6035 fs_locations->server = server; 6036 fs_locations->nlocations = 0; 6037 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 6038 dprintk("%s: returned status = %d\n", __func__, status); 6039 return status; 6040 } 6041 6042 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 6043 const struct qstr *name, 6044 struct nfs4_fs_locations *fs_locations, 6045 struct page *page) 6046 { 6047 struct nfs4_exception exception = { }; 6048 int err; 6049 do { 6050 err = _nfs4_proc_fs_locations(client, dir, name, 6051 fs_locations, page); 6052 trace_nfs4_get_fs_locations(dir, name, err); 6053 err = nfs4_handle_exception(NFS_SERVER(dir), err, 6054 &exception); 6055 } while (exception.retry); 6056 return err; 6057 } 6058 6059 /* 6060 * This operation also signals the server that this client is 6061 * performing migration recovery. The server can stop returning 6062 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 6063 * appended to this compound to identify the client ID which is 6064 * performing recovery. 6065 */ 6066 static int _nfs40_proc_get_locations(struct inode *inode, 6067 struct nfs4_fs_locations *locations, 6068 struct page *page, struct rpc_cred *cred) 6069 { 6070 struct nfs_server *server = NFS_SERVER(inode); 6071 struct rpc_clnt *clnt = server->client; 6072 u32 bitmask[2] = { 6073 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6074 }; 6075 struct nfs4_fs_locations_arg args = { 6076 .clientid = server->nfs_client->cl_clientid, 6077 .fh = NFS_FH(inode), 6078 .page = page, 6079 .bitmask = bitmask, 6080 .migration = 1, /* skip LOOKUP */ 6081 .renew = 1, /* append RENEW */ 6082 }; 6083 struct nfs4_fs_locations_res res = { 6084 .fs_locations = locations, 6085 .migration = 1, 6086 .renew = 1, 6087 }; 6088 struct rpc_message msg = { 6089 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6090 .rpc_argp = &args, 6091 .rpc_resp = &res, 6092 .rpc_cred = cred, 6093 }; 6094 unsigned long now = jiffies; 6095 int status; 6096 6097 nfs_fattr_init(&locations->fattr); 6098 locations->server = server; 6099 locations->nlocations = 0; 6100 6101 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6102 nfs4_set_sequence_privileged(&args.seq_args); 6103 status = nfs4_call_sync_sequence(clnt, server, &msg, 6104 &args.seq_args, &res.seq_res); 6105 if (status) 6106 return status; 6107 6108 renew_lease(server, now); 6109 return 0; 6110 } 6111 6112 #ifdef CONFIG_NFS_V4_1 6113 6114 /* 6115 * This operation also signals the server that this client is 6116 * performing migration recovery. The server can stop asserting 6117 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 6118 * performing this operation is identified in the SEQUENCE 6119 * operation in this compound. 6120 * 6121 * When the client supports GETATTR(fs_locations_info), it can 6122 * be plumbed in here. 6123 */ 6124 static int _nfs41_proc_get_locations(struct inode *inode, 6125 struct nfs4_fs_locations *locations, 6126 struct page *page, struct rpc_cred *cred) 6127 { 6128 struct nfs_server *server = NFS_SERVER(inode); 6129 struct rpc_clnt *clnt = server->client; 6130 u32 bitmask[2] = { 6131 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6132 }; 6133 struct nfs4_fs_locations_arg args = { 6134 .fh = NFS_FH(inode), 6135 .page = page, 6136 .bitmask = bitmask, 6137 .migration = 1, /* skip LOOKUP */ 6138 }; 6139 struct nfs4_fs_locations_res res = { 6140 .fs_locations = locations, 6141 .migration = 1, 6142 }; 6143 struct rpc_message msg = { 6144 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6145 .rpc_argp = &args, 6146 .rpc_resp = &res, 6147 .rpc_cred = cred, 6148 }; 6149 int status; 6150 6151 nfs_fattr_init(&locations->fattr); 6152 locations->server = server; 6153 locations->nlocations = 0; 6154 6155 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6156 nfs4_set_sequence_privileged(&args.seq_args); 6157 status = nfs4_call_sync_sequence(clnt, server, &msg, 6158 &args.seq_args, &res.seq_res); 6159 if (status == NFS4_OK && 6160 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 6161 status = -NFS4ERR_LEASE_MOVED; 6162 return status; 6163 } 6164 6165 #endif /* CONFIG_NFS_V4_1 */ 6166 6167 /** 6168 * nfs4_proc_get_locations - discover locations for a migrated FSID 6169 * @inode: inode on FSID that is migrating 6170 * @locations: result of query 6171 * @page: buffer 6172 * @cred: credential to use for this operation 6173 * 6174 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 6175 * operation failed, or a negative errno if a local error occurred. 6176 * 6177 * On success, "locations" is filled in, but if the server has 6178 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 6179 * asserted. 6180 * 6181 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 6182 * from this client that require migration recovery. 6183 */ 6184 int nfs4_proc_get_locations(struct inode *inode, 6185 struct nfs4_fs_locations *locations, 6186 struct page *page, struct rpc_cred *cred) 6187 { 6188 struct nfs_server *server = NFS_SERVER(inode); 6189 struct nfs_client *clp = server->nfs_client; 6190 const struct nfs4_mig_recovery_ops *ops = 6191 clp->cl_mvops->mig_recovery_ops; 6192 struct nfs4_exception exception = { }; 6193 int status; 6194 6195 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 6196 (unsigned long long)server->fsid.major, 6197 (unsigned long long)server->fsid.minor, 6198 clp->cl_hostname); 6199 nfs_display_fhandle(NFS_FH(inode), __func__); 6200 6201 do { 6202 status = ops->get_locations(inode, locations, page, cred); 6203 if (status != -NFS4ERR_DELAY) 6204 break; 6205 nfs4_handle_exception(server, status, &exception); 6206 } while (exception.retry); 6207 return status; 6208 } 6209 6210 /* 6211 * This operation also signals the server that this client is 6212 * performing "lease moved" recovery. The server can stop 6213 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 6214 * is appended to this compound to identify the client ID which is 6215 * performing recovery. 6216 */ 6217 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6218 { 6219 struct nfs_server *server = NFS_SERVER(inode); 6220 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 6221 struct rpc_clnt *clnt = server->client; 6222 struct nfs4_fsid_present_arg args = { 6223 .fh = NFS_FH(inode), 6224 .clientid = clp->cl_clientid, 6225 .renew = 1, /* append RENEW */ 6226 }; 6227 struct nfs4_fsid_present_res res = { 6228 .renew = 1, 6229 }; 6230 struct rpc_message msg = { 6231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 6232 .rpc_argp = &args, 6233 .rpc_resp = &res, 6234 .rpc_cred = cred, 6235 }; 6236 unsigned long now = jiffies; 6237 int status; 6238 6239 res.fh = nfs_alloc_fhandle(); 6240 if (res.fh == NULL) 6241 return -ENOMEM; 6242 6243 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6244 nfs4_set_sequence_privileged(&args.seq_args); 6245 status = nfs4_call_sync_sequence(clnt, server, &msg, 6246 &args.seq_args, &res.seq_res); 6247 nfs_free_fhandle(res.fh); 6248 if (status) 6249 return status; 6250 6251 do_renew_lease(clp, now); 6252 return 0; 6253 } 6254 6255 #ifdef CONFIG_NFS_V4_1 6256 6257 /* 6258 * This operation also signals the server that this client is 6259 * performing "lease moved" recovery. The server can stop asserting 6260 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 6261 * this operation is identified in the SEQUENCE operation in this 6262 * compound. 6263 */ 6264 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6265 { 6266 struct nfs_server *server = NFS_SERVER(inode); 6267 struct rpc_clnt *clnt = server->client; 6268 struct nfs4_fsid_present_arg args = { 6269 .fh = NFS_FH(inode), 6270 }; 6271 struct nfs4_fsid_present_res res = { 6272 }; 6273 struct rpc_message msg = { 6274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 6275 .rpc_argp = &args, 6276 .rpc_resp = &res, 6277 .rpc_cred = cred, 6278 }; 6279 int status; 6280 6281 res.fh = nfs_alloc_fhandle(); 6282 if (res.fh == NULL) 6283 return -ENOMEM; 6284 6285 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6286 nfs4_set_sequence_privileged(&args.seq_args); 6287 status = nfs4_call_sync_sequence(clnt, server, &msg, 6288 &args.seq_args, &res.seq_res); 6289 nfs_free_fhandle(res.fh); 6290 if (status == NFS4_OK && 6291 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 6292 status = -NFS4ERR_LEASE_MOVED; 6293 return status; 6294 } 6295 6296 #endif /* CONFIG_NFS_V4_1 */ 6297 6298 /** 6299 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 6300 * @inode: inode on FSID to check 6301 * @cred: credential to use for this operation 6302 * 6303 * Server indicates whether the FSID is present, moved, or not 6304 * recognized. This operation is necessary to clear a LEASE_MOVED 6305 * condition for this client ID. 6306 * 6307 * Returns NFS4_OK if the FSID is present on this server, 6308 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 6309 * NFS4ERR code if some error occurred on the server, or a 6310 * negative errno if a local failure occurred. 6311 */ 6312 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6313 { 6314 struct nfs_server *server = NFS_SERVER(inode); 6315 struct nfs_client *clp = server->nfs_client; 6316 const struct nfs4_mig_recovery_ops *ops = 6317 clp->cl_mvops->mig_recovery_ops; 6318 struct nfs4_exception exception = { }; 6319 int status; 6320 6321 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 6322 (unsigned long long)server->fsid.major, 6323 (unsigned long long)server->fsid.minor, 6324 clp->cl_hostname); 6325 nfs_display_fhandle(NFS_FH(inode), __func__); 6326 6327 do { 6328 status = ops->fsid_present(inode, cred); 6329 if (status != -NFS4ERR_DELAY) 6330 break; 6331 nfs4_handle_exception(server, status, &exception); 6332 } while (exception.retry); 6333 return status; 6334 } 6335 6336 /** 6337 * If 'use_integrity' is true and the state managment nfs_client 6338 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 6339 * and the machine credential as per RFC3530bis and RFC5661 Security 6340 * Considerations sections. Otherwise, just use the user cred with the 6341 * filesystem's rpc_client. 6342 */ 6343 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 6344 { 6345 int status; 6346 struct nfs4_secinfo_arg args = { 6347 .dir_fh = NFS_FH(dir), 6348 .name = name, 6349 }; 6350 struct nfs4_secinfo_res res = { 6351 .flavors = flavors, 6352 }; 6353 struct rpc_message msg = { 6354 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 6355 .rpc_argp = &args, 6356 .rpc_resp = &res, 6357 }; 6358 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 6359 struct rpc_cred *cred = NULL; 6360 6361 if (use_integrity) { 6362 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient; 6363 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client); 6364 msg.rpc_cred = cred; 6365 } 6366 6367 dprintk("NFS call secinfo %s\n", name->name); 6368 6369 nfs4_state_protect(NFS_SERVER(dir)->nfs_client, 6370 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 6371 6372 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, 6373 &res.seq_res, 0); 6374 dprintk("NFS reply secinfo: %d\n", status); 6375 6376 if (cred) 6377 put_rpccred(cred); 6378 6379 return status; 6380 } 6381 6382 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 6383 struct nfs4_secinfo_flavors *flavors) 6384 { 6385 struct nfs4_exception exception = { }; 6386 int err; 6387 do { 6388 err = -NFS4ERR_WRONGSEC; 6389 6390 /* try to use integrity protection with machine cred */ 6391 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 6392 err = _nfs4_proc_secinfo(dir, name, flavors, true); 6393 6394 /* 6395 * if unable to use integrity protection, or SECINFO with 6396 * integrity protection returns NFS4ERR_WRONGSEC (which is 6397 * disallowed by spec, but exists in deployed servers) use 6398 * the current filesystem's rpc_client and the user cred. 6399 */ 6400 if (err == -NFS4ERR_WRONGSEC) 6401 err = _nfs4_proc_secinfo(dir, name, flavors, false); 6402 6403 trace_nfs4_secinfo(dir, name, err); 6404 err = nfs4_handle_exception(NFS_SERVER(dir), err, 6405 &exception); 6406 } while (exception.retry); 6407 return err; 6408 } 6409 6410 #ifdef CONFIG_NFS_V4_1 6411 /* 6412 * Check the exchange flags returned by the server for invalid flags, having 6413 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 6414 * DS flags set. 6415 */ 6416 static int nfs4_check_cl_exchange_flags(u32 flags) 6417 { 6418 if (flags & ~EXCHGID4_FLAG_MASK_R) 6419 goto out_inval; 6420 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 6421 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 6422 goto out_inval; 6423 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 6424 goto out_inval; 6425 return NFS_OK; 6426 out_inval: 6427 return -NFS4ERR_INVAL; 6428 } 6429 6430 static bool 6431 nfs41_same_server_scope(struct nfs41_server_scope *a, 6432 struct nfs41_server_scope *b) 6433 { 6434 if (a->server_scope_sz == b->server_scope_sz && 6435 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0) 6436 return true; 6437 6438 return false; 6439 } 6440 6441 /* 6442 * nfs4_proc_bind_conn_to_session() 6443 * 6444 * The 4.1 client currently uses the same TCP connection for the 6445 * fore and backchannel. 6446 */ 6447 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred) 6448 { 6449 int status; 6450 struct nfs41_bind_conn_to_session_res res; 6451 struct rpc_message msg = { 6452 .rpc_proc = 6453 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 6454 .rpc_argp = clp, 6455 .rpc_resp = &res, 6456 .rpc_cred = cred, 6457 }; 6458 6459 dprintk("--> %s\n", __func__); 6460 6461 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS); 6462 if (unlikely(res.session == NULL)) { 6463 status = -ENOMEM; 6464 goto out; 6465 } 6466 6467 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 6468 trace_nfs4_bind_conn_to_session(clp, status); 6469 if (status == 0) { 6470 if (memcmp(res.session->sess_id.data, 6471 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 6472 dprintk("NFS: %s: Session ID mismatch\n", __func__); 6473 status = -EIO; 6474 goto out_session; 6475 } 6476 if (res.dir != NFS4_CDFS4_BOTH) { 6477 dprintk("NFS: %s: Unexpected direction from server\n", 6478 __func__); 6479 status = -EIO; 6480 goto out_session; 6481 } 6482 if (res.use_conn_in_rdma_mode) { 6483 dprintk("NFS: %s: Server returned RDMA mode = true\n", 6484 __func__); 6485 status = -EIO; 6486 goto out_session; 6487 } 6488 } 6489 out_session: 6490 kfree(res.session); 6491 out: 6492 dprintk("<-- %s status= %d\n", __func__, status); 6493 return status; 6494 } 6495 6496 /* 6497 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 6498 * and operations we'd like to see to enable certain features in the allow map 6499 */ 6500 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 6501 .how = SP4_MACH_CRED, 6502 .enforce.u.words = { 6503 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 6504 1 << (OP_EXCHANGE_ID - 32) | 6505 1 << (OP_CREATE_SESSION - 32) | 6506 1 << (OP_DESTROY_SESSION - 32) | 6507 1 << (OP_DESTROY_CLIENTID - 32) 6508 }, 6509 .allow.u.words = { 6510 [0] = 1 << (OP_CLOSE) | 6511 1 << (OP_LOCKU) | 6512 1 << (OP_COMMIT), 6513 [1] = 1 << (OP_SECINFO - 32) | 6514 1 << (OP_SECINFO_NO_NAME - 32) | 6515 1 << (OP_TEST_STATEID - 32) | 6516 1 << (OP_FREE_STATEID - 32) | 6517 1 << (OP_WRITE - 32) 6518 } 6519 }; 6520 6521 /* 6522 * Select the state protection mode for client `clp' given the server results 6523 * from exchange_id in `sp'. 6524 * 6525 * Returns 0 on success, negative errno otherwise. 6526 */ 6527 static int nfs4_sp4_select_mode(struct nfs_client *clp, 6528 struct nfs41_state_protection *sp) 6529 { 6530 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 6531 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 6532 1 << (OP_EXCHANGE_ID - 32) | 6533 1 << (OP_CREATE_SESSION - 32) | 6534 1 << (OP_DESTROY_SESSION - 32) | 6535 1 << (OP_DESTROY_CLIENTID - 32) 6536 }; 6537 unsigned int i; 6538 6539 if (sp->how == SP4_MACH_CRED) { 6540 /* Print state protect result */ 6541 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 6542 for (i = 0; i <= LAST_NFS4_OP; i++) { 6543 if (test_bit(i, sp->enforce.u.longs)) 6544 dfprintk(MOUNT, " enforce op %d\n", i); 6545 if (test_bit(i, sp->allow.u.longs)) 6546 dfprintk(MOUNT, " allow op %d\n", i); 6547 } 6548 6549 /* make sure nothing is on enforce list that isn't supported */ 6550 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 6551 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 6552 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 6553 return -EINVAL; 6554 } 6555 } 6556 6557 /* 6558 * Minimal mode - state operations are allowed to use machine 6559 * credential. Note this already happens by default, so the 6560 * client doesn't have to do anything more than the negotiation. 6561 * 6562 * NOTE: we don't care if EXCHANGE_ID is in the list - 6563 * we're already using the machine cred for exchange_id 6564 * and will never use a different cred. 6565 */ 6566 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 6567 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 6568 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 6569 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 6570 dfprintk(MOUNT, "sp4_mach_cred:\n"); 6571 dfprintk(MOUNT, " minimal mode enabled\n"); 6572 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags); 6573 } else { 6574 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 6575 return -EINVAL; 6576 } 6577 6578 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 6579 test_bit(OP_LOCKU, sp->allow.u.longs)) { 6580 dfprintk(MOUNT, " cleanup mode enabled\n"); 6581 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags); 6582 } 6583 6584 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 6585 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 6586 dfprintk(MOUNT, " secinfo mode enabled\n"); 6587 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags); 6588 } 6589 6590 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 6591 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 6592 dfprintk(MOUNT, " stateid mode enabled\n"); 6593 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags); 6594 } 6595 6596 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 6597 dfprintk(MOUNT, " write mode enabled\n"); 6598 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags); 6599 } 6600 6601 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 6602 dfprintk(MOUNT, " commit mode enabled\n"); 6603 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags); 6604 } 6605 } 6606 6607 return 0; 6608 } 6609 6610 /* 6611 * _nfs4_proc_exchange_id() 6612 * 6613 * Wrapper for EXCHANGE_ID operation. 6614 */ 6615 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred, 6616 u32 sp4_how) 6617 { 6618 nfs4_verifier verifier; 6619 struct nfs41_exchange_id_args args = { 6620 .verifier = &verifier, 6621 .client = clp, 6622 #ifdef CONFIG_NFS_V4_1_MIGRATION 6623 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 6624 EXCHGID4_FLAG_BIND_PRINC_STATEID | 6625 EXCHGID4_FLAG_SUPP_MOVED_MIGR, 6626 #else 6627 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 6628 EXCHGID4_FLAG_BIND_PRINC_STATEID, 6629 #endif 6630 }; 6631 struct nfs41_exchange_id_res res = { 6632 0 6633 }; 6634 int status; 6635 struct rpc_message msg = { 6636 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 6637 .rpc_argp = &args, 6638 .rpc_resp = &res, 6639 .rpc_cred = cred, 6640 }; 6641 6642 nfs4_init_boot_verifier(clp, &verifier); 6643 args.id_len = nfs4_init_uniform_client_string(clp, args.id, 6644 sizeof(args.id)); 6645 dprintk("NFS call exchange_id auth=%s, '%.*s'\n", 6646 clp->cl_rpcclient->cl_auth->au_ops->au_name, 6647 args.id_len, args.id); 6648 6649 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 6650 GFP_NOFS); 6651 if (unlikely(res.server_owner == NULL)) { 6652 status = -ENOMEM; 6653 goto out; 6654 } 6655 6656 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 6657 GFP_NOFS); 6658 if (unlikely(res.server_scope == NULL)) { 6659 status = -ENOMEM; 6660 goto out_server_owner; 6661 } 6662 6663 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 6664 if (unlikely(res.impl_id == NULL)) { 6665 status = -ENOMEM; 6666 goto out_server_scope; 6667 } 6668 6669 switch (sp4_how) { 6670 case SP4_NONE: 6671 args.state_protect.how = SP4_NONE; 6672 break; 6673 6674 case SP4_MACH_CRED: 6675 args.state_protect = nfs4_sp4_mach_cred_request; 6676 break; 6677 6678 default: 6679 /* unsupported! */ 6680 WARN_ON_ONCE(1); 6681 status = -EINVAL; 6682 goto out_server_scope; 6683 } 6684 6685 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 6686 trace_nfs4_exchange_id(clp, status); 6687 if (status == 0) 6688 status = nfs4_check_cl_exchange_flags(res.flags); 6689 6690 if (status == 0) 6691 status = nfs4_sp4_select_mode(clp, &res.state_protect); 6692 6693 if (status == 0) { 6694 clp->cl_clientid = res.clientid; 6695 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R); 6696 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) 6697 clp->cl_seqid = res.seqid; 6698 6699 kfree(clp->cl_serverowner); 6700 clp->cl_serverowner = res.server_owner; 6701 res.server_owner = NULL; 6702 6703 /* use the most recent implementation id */ 6704 kfree(clp->cl_implid); 6705 clp->cl_implid = res.impl_id; 6706 6707 if (clp->cl_serverscope != NULL && 6708 !nfs41_same_server_scope(clp->cl_serverscope, 6709 res.server_scope)) { 6710 dprintk("%s: server_scope mismatch detected\n", 6711 __func__); 6712 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 6713 kfree(clp->cl_serverscope); 6714 clp->cl_serverscope = NULL; 6715 } 6716 6717 if (clp->cl_serverscope == NULL) { 6718 clp->cl_serverscope = res.server_scope; 6719 goto out; 6720 } 6721 } else 6722 kfree(res.impl_id); 6723 6724 out_server_owner: 6725 kfree(res.server_owner); 6726 out_server_scope: 6727 kfree(res.server_scope); 6728 out: 6729 if (clp->cl_implid != NULL) 6730 dprintk("NFS reply exchange_id: Server Implementation ID: " 6731 "domain: %s, name: %s, date: %llu,%u\n", 6732 clp->cl_implid->domain, clp->cl_implid->name, 6733 clp->cl_implid->date.seconds, 6734 clp->cl_implid->date.nseconds); 6735 dprintk("NFS reply exchange_id: %d\n", status); 6736 return status; 6737 } 6738 6739 /* 6740 * nfs4_proc_exchange_id() 6741 * 6742 * Returns zero, a negative errno, or a negative NFS4ERR status code. 6743 * 6744 * Since the clientid has expired, all compounds using sessions 6745 * associated with the stale clientid will be returning 6746 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 6747 * be in some phase of session reset. 6748 * 6749 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 6750 */ 6751 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) 6752 { 6753 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 6754 int status; 6755 6756 /* try SP4_MACH_CRED if krb5i/p */ 6757 if (authflavor == RPC_AUTH_GSS_KRB5I || 6758 authflavor == RPC_AUTH_GSS_KRB5P) { 6759 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED); 6760 if (!status) 6761 return 0; 6762 } 6763 6764 /* try SP4_NONE */ 6765 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE); 6766 } 6767 6768 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 6769 struct rpc_cred *cred) 6770 { 6771 struct rpc_message msg = { 6772 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 6773 .rpc_argp = clp, 6774 .rpc_cred = cred, 6775 }; 6776 int status; 6777 6778 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 6779 trace_nfs4_destroy_clientid(clp, status); 6780 if (status) 6781 dprintk("NFS: Got error %d from the server %s on " 6782 "DESTROY_CLIENTID.", status, clp->cl_hostname); 6783 return status; 6784 } 6785 6786 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 6787 struct rpc_cred *cred) 6788 { 6789 unsigned int loop; 6790 int ret; 6791 6792 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 6793 ret = _nfs4_proc_destroy_clientid(clp, cred); 6794 switch (ret) { 6795 case -NFS4ERR_DELAY: 6796 case -NFS4ERR_CLIENTID_BUSY: 6797 ssleep(1); 6798 break; 6799 default: 6800 return ret; 6801 } 6802 } 6803 return 0; 6804 } 6805 6806 int nfs4_destroy_clientid(struct nfs_client *clp) 6807 { 6808 struct rpc_cred *cred; 6809 int ret = 0; 6810 6811 if (clp->cl_mvops->minor_version < 1) 6812 goto out; 6813 if (clp->cl_exchange_flags == 0) 6814 goto out; 6815 if (clp->cl_preserve_clid) 6816 goto out; 6817 cred = nfs4_get_clid_cred(clp); 6818 ret = nfs4_proc_destroy_clientid(clp, cred); 6819 if (cred) 6820 put_rpccred(cred); 6821 switch (ret) { 6822 case 0: 6823 case -NFS4ERR_STALE_CLIENTID: 6824 clp->cl_exchange_flags = 0; 6825 } 6826 out: 6827 return ret; 6828 } 6829 6830 struct nfs4_get_lease_time_data { 6831 struct nfs4_get_lease_time_args *args; 6832 struct nfs4_get_lease_time_res *res; 6833 struct nfs_client *clp; 6834 }; 6835 6836 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 6837 void *calldata) 6838 { 6839 struct nfs4_get_lease_time_data *data = 6840 (struct nfs4_get_lease_time_data *)calldata; 6841 6842 dprintk("--> %s\n", __func__); 6843 /* just setup sequence, do not trigger session recovery 6844 since we're invoked within one */ 6845 nfs41_setup_sequence(data->clp->cl_session, 6846 &data->args->la_seq_args, 6847 &data->res->lr_seq_res, 6848 task); 6849 dprintk("<-- %s\n", __func__); 6850 } 6851 6852 /* 6853 * Called from nfs4_state_manager thread for session setup, so don't recover 6854 * from sequence operation or clientid errors. 6855 */ 6856 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 6857 { 6858 struct nfs4_get_lease_time_data *data = 6859 (struct nfs4_get_lease_time_data *)calldata; 6860 6861 dprintk("--> %s\n", __func__); 6862 if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) 6863 return; 6864 switch (task->tk_status) { 6865 case -NFS4ERR_DELAY: 6866 case -NFS4ERR_GRACE: 6867 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 6868 rpc_delay(task, NFS4_POLL_RETRY_MIN); 6869 task->tk_status = 0; 6870 /* fall through */ 6871 case -NFS4ERR_RETRY_UNCACHED_REP: 6872 rpc_restart_call_prepare(task); 6873 return; 6874 } 6875 dprintk("<-- %s\n", __func__); 6876 } 6877 6878 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 6879 .rpc_call_prepare = nfs4_get_lease_time_prepare, 6880 .rpc_call_done = nfs4_get_lease_time_done, 6881 }; 6882 6883 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 6884 { 6885 struct rpc_task *task; 6886 struct nfs4_get_lease_time_args args; 6887 struct nfs4_get_lease_time_res res = { 6888 .lr_fsinfo = fsinfo, 6889 }; 6890 struct nfs4_get_lease_time_data data = { 6891 .args = &args, 6892 .res = &res, 6893 .clp = clp, 6894 }; 6895 struct rpc_message msg = { 6896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 6897 .rpc_argp = &args, 6898 .rpc_resp = &res, 6899 }; 6900 struct rpc_task_setup task_setup = { 6901 .rpc_client = clp->cl_rpcclient, 6902 .rpc_message = &msg, 6903 .callback_ops = &nfs4_get_lease_time_ops, 6904 .callback_data = &data, 6905 .flags = RPC_TASK_TIMEOUT, 6906 }; 6907 int status; 6908 6909 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0); 6910 nfs4_set_sequence_privileged(&args.la_seq_args); 6911 dprintk("--> %s\n", __func__); 6912 task = rpc_run_task(&task_setup); 6913 6914 if (IS_ERR(task)) 6915 status = PTR_ERR(task); 6916 else { 6917 status = task->tk_status; 6918 rpc_put_task(task); 6919 } 6920 dprintk("<-- %s return %d\n", __func__, status); 6921 6922 return status; 6923 } 6924 6925 /* 6926 * Initialize the values to be used by the client in CREATE_SESSION 6927 * If nfs4_init_session set the fore channel request and response sizes, 6928 * use them. 6929 * 6930 * Set the back channel max_resp_sz_cached to zero to force the client to 6931 * always set csa_cachethis to FALSE because the current implementation 6932 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 6933 */ 6934 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args) 6935 { 6936 unsigned int max_rqst_sz, max_resp_sz; 6937 6938 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 6939 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 6940 6941 /* Fore channel attributes */ 6942 args->fc_attrs.max_rqst_sz = max_rqst_sz; 6943 args->fc_attrs.max_resp_sz = max_resp_sz; 6944 args->fc_attrs.max_ops = NFS4_MAX_OPS; 6945 args->fc_attrs.max_reqs = max_session_slots; 6946 6947 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 6948 "max_ops=%u max_reqs=%u\n", 6949 __func__, 6950 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 6951 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 6952 6953 /* Back channel attributes */ 6954 args->bc_attrs.max_rqst_sz = PAGE_SIZE; 6955 args->bc_attrs.max_resp_sz = PAGE_SIZE; 6956 args->bc_attrs.max_resp_sz_cached = 0; 6957 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 6958 args->bc_attrs.max_reqs = 1; 6959 6960 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 6961 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 6962 __func__, 6963 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 6964 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 6965 args->bc_attrs.max_reqs); 6966 } 6967 6968 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session) 6969 { 6970 struct nfs4_channel_attrs *sent = &args->fc_attrs; 6971 struct nfs4_channel_attrs *rcvd = &session->fc_attrs; 6972 6973 if (rcvd->max_resp_sz > sent->max_resp_sz) 6974 return -EINVAL; 6975 /* 6976 * Our requested max_ops is the minimum we need; we're not 6977 * prepared to break up compounds into smaller pieces than that. 6978 * So, no point even trying to continue if the server won't 6979 * cooperate: 6980 */ 6981 if (rcvd->max_ops < sent->max_ops) 6982 return -EINVAL; 6983 if (rcvd->max_reqs == 0) 6984 return -EINVAL; 6985 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 6986 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 6987 return 0; 6988 } 6989 6990 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session) 6991 { 6992 struct nfs4_channel_attrs *sent = &args->bc_attrs; 6993 struct nfs4_channel_attrs *rcvd = &session->bc_attrs; 6994 6995 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 6996 return -EINVAL; 6997 if (rcvd->max_resp_sz < sent->max_resp_sz) 6998 return -EINVAL; 6999 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 7000 return -EINVAL; 7001 /* These would render the backchannel useless: */ 7002 if (rcvd->max_ops != sent->max_ops) 7003 return -EINVAL; 7004 if (rcvd->max_reqs != sent->max_reqs) 7005 return -EINVAL; 7006 return 0; 7007 } 7008 7009 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 7010 struct nfs4_session *session) 7011 { 7012 int ret; 7013 7014 ret = nfs4_verify_fore_channel_attrs(args, session); 7015 if (ret) 7016 return ret; 7017 return nfs4_verify_back_channel_attrs(args, session); 7018 } 7019 7020 static int _nfs4_proc_create_session(struct nfs_client *clp, 7021 struct rpc_cred *cred) 7022 { 7023 struct nfs4_session *session = clp->cl_session; 7024 struct nfs41_create_session_args args = { 7025 .client = clp, 7026 .cb_program = NFS4_CALLBACK, 7027 }; 7028 struct nfs41_create_session_res res = { 7029 .client = clp, 7030 }; 7031 struct rpc_message msg = { 7032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 7033 .rpc_argp = &args, 7034 .rpc_resp = &res, 7035 .rpc_cred = cred, 7036 }; 7037 int status; 7038 7039 nfs4_init_channel_attrs(&args); 7040 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 7041 7042 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 7043 trace_nfs4_create_session(clp, status); 7044 7045 if (!status) { 7046 /* Verify the session's negotiated channel_attrs values */ 7047 status = nfs4_verify_channel_attrs(&args, session); 7048 /* Increment the clientid slot sequence id */ 7049 clp->cl_seqid++; 7050 } 7051 7052 return status; 7053 } 7054 7055 /* 7056 * Issues a CREATE_SESSION operation to the server. 7057 * It is the responsibility of the caller to verify the session is 7058 * expired before calling this routine. 7059 */ 7060 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred) 7061 { 7062 int status; 7063 unsigned *ptr; 7064 struct nfs4_session *session = clp->cl_session; 7065 7066 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 7067 7068 status = _nfs4_proc_create_session(clp, cred); 7069 if (status) 7070 goto out; 7071 7072 /* Init or reset the session slot tables */ 7073 status = nfs4_setup_session_slot_tables(session); 7074 dprintk("slot table setup returned %d\n", status); 7075 if (status) 7076 goto out; 7077 7078 ptr = (unsigned *)&session->sess_id.data[0]; 7079 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 7080 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 7081 out: 7082 dprintk("<-- %s\n", __func__); 7083 return status; 7084 } 7085 7086 /* 7087 * Issue the over-the-wire RPC DESTROY_SESSION. 7088 * The caller must serialize access to this routine. 7089 */ 7090 int nfs4_proc_destroy_session(struct nfs4_session *session, 7091 struct rpc_cred *cred) 7092 { 7093 struct rpc_message msg = { 7094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 7095 .rpc_argp = session, 7096 .rpc_cred = cred, 7097 }; 7098 int status = 0; 7099 7100 dprintk("--> nfs4_proc_destroy_session\n"); 7101 7102 /* session is still being setup */ 7103 if (session->clp->cl_cons_state != NFS_CS_READY) 7104 return status; 7105 7106 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 7107 trace_nfs4_destroy_session(session->clp, status); 7108 7109 if (status) 7110 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 7111 "Session has been destroyed regardless...\n", status); 7112 7113 dprintk("<-- nfs4_proc_destroy_session\n"); 7114 return status; 7115 } 7116 7117 /* 7118 * Renew the cl_session lease. 7119 */ 7120 struct nfs4_sequence_data { 7121 struct nfs_client *clp; 7122 struct nfs4_sequence_args args; 7123 struct nfs4_sequence_res res; 7124 }; 7125 7126 static void nfs41_sequence_release(void *data) 7127 { 7128 struct nfs4_sequence_data *calldata = data; 7129 struct nfs_client *clp = calldata->clp; 7130 7131 if (atomic_read(&clp->cl_count) > 1) 7132 nfs4_schedule_state_renewal(clp); 7133 nfs_put_client(clp); 7134 kfree(calldata); 7135 } 7136 7137 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 7138 { 7139 switch(task->tk_status) { 7140 case -NFS4ERR_DELAY: 7141 rpc_delay(task, NFS4_POLL_RETRY_MAX); 7142 return -EAGAIN; 7143 default: 7144 nfs4_schedule_lease_recovery(clp); 7145 } 7146 return 0; 7147 } 7148 7149 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 7150 { 7151 struct nfs4_sequence_data *calldata = data; 7152 struct nfs_client *clp = calldata->clp; 7153 7154 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 7155 return; 7156 7157 trace_nfs4_sequence(clp, task->tk_status); 7158 if (task->tk_status < 0) { 7159 dprintk("%s ERROR %d\n", __func__, task->tk_status); 7160 if (atomic_read(&clp->cl_count) == 1) 7161 goto out; 7162 7163 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 7164 rpc_restart_call_prepare(task); 7165 return; 7166 } 7167 } 7168 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 7169 out: 7170 dprintk("<-- %s\n", __func__); 7171 } 7172 7173 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 7174 { 7175 struct nfs4_sequence_data *calldata = data; 7176 struct nfs_client *clp = calldata->clp; 7177 struct nfs4_sequence_args *args; 7178 struct nfs4_sequence_res *res; 7179 7180 args = task->tk_msg.rpc_argp; 7181 res = task->tk_msg.rpc_resp; 7182 7183 nfs41_setup_sequence(clp->cl_session, args, res, task); 7184 } 7185 7186 static const struct rpc_call_ops nfs41_sequence_ops = { 7187 .rpc_call_done = nfs41_sequence_call_done, 7188 .rpc_call_prepare = nfs41_sequence_prepare, 7189 .rpc_release = nfs41_sequence_release, 7190 }; 7191 7192 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 7193 struct rpc_cred *cred, 7194 bool is_privileged) 7195 { 7196 struct nfs4_sequence_data *calldata; 7197 struct rpc_message msg = { 7198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 7199 .rpc_cred = cred, 7200 }; 7201 struct rpc_task_setup task_setup_data = { 7202 .rpc_client = clp->cl_rpcclient, 7203 .rpc_message = &msg, 7204 .callback_ops = &nfs41_sequence_ops, 7205 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 7206 }; 7207 7208 if (!atomic_inc_not_zero(&clp->cl_count)) 7209 return ERR_PTR(-EIO); 7210 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 7211 if (calldata == NULL) { 7212 nfs_put_client(clp); 7213 return ERR_PTR(-ENOMEM); 7214 } 7215 nfs4_init_sequence(&calldata->args, &calldata->res, 0); 7216 if (is_privileged) 7217 nfs4_set_sequence_privileged(&calldata->args); 7218 msg.rpc_argp = &calldata->args; 7219 msg.rpc_resp = &calldata->res; 7220 calldata->clp = clp; 7221 task_setup_data.callback_data = calldata; 7222 7223 return rpc_run_task(&task_setup_data); 7224 } 7225 7226 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) 7227 { 7228 struct rpc_task *task; 7229 int ret = 0; 7230 7231 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 7232 return 0; 7233 task = _nfs41_proc_sequence(clp, cred, false); 7234 if (IS_ERR(task)) 7235 ret = PTR_ERR(task); 7236 else 7237 rpc_put_task_async(task); 7238 dprintk("<-- %s status=%d\n", __func__, ret); 7239 return ret; 7240 } 7241 7242 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) 7243 { 7244 struct rpc_task *task; 7245 int ret; 7246 7247 task = _nfs41_proc_sequence(clp, cred, true); 7248 if (IS_ERR(task)) { 7249 ret = PTR_ERR(task); 7250 goto out; 7251 } 7252 ret = rpc_wait_for_completion_task(task); 7253 if (!ret) { 7254 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp; 7255 7256 if (task->tk_status == 0) 7257 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags); 7258 ret = task->tk_status; 7259 } 7260 rpc_put_task(task); 7261 out: 7262 dprintk("<-- %s status=%d\n", __func__, ret); 7263 return ret; 7264 } 7265 7266 struct nfs4_reclaim_complete_data { 7267 struct nfs_client *clp; 7268 struct nfs41_reclaim_complete_args arg; 7269 struct nfs41_reclaim_complete_res res; 7270 }; 7271 7272 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 7273 { 7274 struct nfs4_reclaim_complete_data *calldata = data; 7275 7276 nfs41_setup_sequence(calldata->clp->cl_session, 7277 &calldata->arg.seq_args, 7278 &calldata->res.seq_res, 7279 task); 7280 } 7281 7282 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 7283 { 7284 switch(task->tk_status) { 7285 case 0: 7286 case -NFS4ERR_COMPLETE_ALREADY: 7287 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 7288 break; 7289 case -NFS4ERR_DELAY: 7290 rpc_delay(task, NFS4_POLL_RETRY_MAX); 7291 /* fall through */ 7292 case -NFS4ERR_RETRY_UNCACHED_REP: 7293 return -EAGAIN; 7294 default: 7295 nfs4_schedule_lease_recovery(clp); 7296 } 7297 return 0; 7298 } 7299 7300 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 7301 { 7302 struct nfs4_reclaim_complete_data *calldata = data; 7303 struct nfs_client *clp = calldata->clp; 7304 struct nfs4_sequence_res *res = &calldata->res.seq_res; 7305 7306 dprintk("--> %s\n", __func__); 7307 if (!nfs41_sequence_done(task, res)) 7308 return; 7309 7310 trace_nfs4_reclaim_complete(clp, task->tk_status); 7311 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 7312 rpc_restart_call_prepare(task); 7313 return; 7314 } 7315 dprintk("<-- %s\n", __func__); 7316 } 7317 7318 static void nfs4_free_reclaim_complete_data(void *data) 7319 { 7320 struct nfs4_reclaim_complete_data *calldata = data; 7321 7322 kfree(calldata); 7323 } 7324 7325 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 7326 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 7327 .rpc_call_done = nfs4_reclaim_complete_done, 7328 .rpc_release = nfs4_free_reclaim_complete_data, 7329 }; 7330 7331 /* 7332 * Issue a global reclaim complete. 7333 */ 7334 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 7335 struct rpc_cred *cred) 7336 { 7337 struct nfs4_reclaim_complete_data *calldata; 7338 struct rpc_task *task; 7339 struct rpc_message msg = { 7340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 7341 .rpc_cred = cred, 7342 }; 7343 struct rpc_task_setup task_setup_data = { 7344 .rpc_client = clp->cl_rpcclient, 7345 .rpc_message = &msg, 7346 .callback_ops = &nfs4_reclaim_complete_call_ops, 7347 .flags = RPC_TASK_ASYNC, 7348 }; 7349 int status = -ENOMEM; 7350 7351 dprintk("--> %s\n", __func__); 7352 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 7353 if (calldata == NULL) 7354 goto out; 7355 calldata->clp = clp; 7356 calldata->arg.one_fs = 0; 7357 7358 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0); 7359 nfs4_set_sequence_privileged(&calldata->arg.seq_args); 7360 msg.rpc_argp = &calldata->arg; 7361 msg.rpc_resp = &calldata->res; 7362 task_setup_data.callback_data = calldata; 7363 task = rpc_run_task(&task_setup_data); 7364 if (IS_ERR(task)) { 7365 status = PTR_ERR(task); 7366 goto out; 7367 } 7368 status = nfs4_wait_for_completion_rpc_task(task); 7369 if (status == 0) 7370 status = task->tk_status; 7371 rpc_put_task(task); 7372 return 0; 7373 out: 7374 dprintk("<-- %s status=%d\n", __func__, status); 7375 return status; 7376 } 7377 7378 static void 7379 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 7380 { 7381 struct nfs4_layoutget *lgp = calldata; 7382 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 7383 struct nfs4_session *session = nfs4_get_session(server); 7384 7385 dprintk("--> %s\n", __func__); 7386 /* Note the is a race here, where a CB_LAYOUTRECALL can come in 7387 * right now covering the LAYOUTGET we are about to send. 7388 * However, that is not so catastrophic, and there seems 7389 * to be no way to prevent it completely. 7390 */ 7391 if (nfs41_setup_sequence(session, &lgp->args.seq_args, 7392 &lgp->res.seq_res, task)) 7393 return; 7394 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid, 7395 NFS_I(lgp->args.inode)->layout, 7396 lgp->args.ctx->state)) { 7397 rpc_exit(task, NFS4_OK); 7398 } 7399 } 7400 7401 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 7402 { 7403 struct nfs4_layoutget *lgp = calldata; 7404 struct inode *inode = lgp->args.inode; 7405 struct nfs_server *server = NFS_SERVER(inode); 7406 struct pnfs_layout_hdr *lo; 7407 struct nfs4_state *state = NULL; 7408 unsigned long timeo, now, giveup; 7409 7410 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 7411 7412 if (!nfs41_sequence_done(task, &lgp->res.seq_res)) 7413 goto out; 7414 7415 switch (task->tk_status) { 7416 case 0: 7417 goto out; 7418 /* 7419 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 7420 * (or clients) writing to the same RAID stripe 7421 */ 7422 case -NFS4ERR_LAYOUTTRYLATER: 7423 /* 7424 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall 7425 * existing layout before getting a new one). 7426 */ 7427 case -NFS4ERR_RECALLCONFLICT: 7428 timeo = rpc_get_timeout(task->tk_client); 7429 giveup = lgp->args.timestamp + timeo; 7430 now = jiffies; 7431 if (time_after(giveup, now)) { 7432 unsigned long delay; 7433 7434 /* Delay for: 7435 * - Not less then NFS4_POLL_RETRY_MIN. 7436 * - One last time a jiffie before we give up 7437 * - exponential backoff (time_now minus start_attempt) 7438 */ 7439 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN, 7440 min((giveup - now - 1), 7441 now - lgp->args.timestamp)); 7442 7443 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n", 7444 __func__, delay); 7445 rpc_delay(task, delay); 7446 task->tk_status = 0; 7447 rpc_restart_call_prepare(task); 7448 goto out; /* Do not call nfs4_async_handle_error() */ 7449 } 7450 break; 7451 case -NFS4ERR_EXPIRED: 7452 case -NFS4ERR_BAD_STATEID: 7453 spin_lock(&inode->i_lock); 7454 lo = NFS_I(inode)->layout; 7455 if (!lo || list_empty(&lo->plh_segs)) { 7456 spin_unlock(&inode->i_lock); 7457 /* If the open stateid was bad, then recover it. */ 7458 state = lgp->args.ctx->state; 7459 } else { 7460 LIST_HEAD(head); 7461 7462 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL); 7463 spin_unlock(&inode->i_lock); 7464 /* Mark the bad layout state as invalid, then 7465 * retry using the open stateid. */ 7466 pnfs_free_lseg_list(&head); 7467 } 7468 } 7469 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) 7470 rpc_restart_call_prepare(task); 7471 out: 7472 dprintk("<-- %s\n", __func__); 7473 } 7474 7475 static size_t max_response_pages(struct nfs_server *server) 7476 { 7477 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 7478 return nfs_page_array_len(0, max_resp_sz); 7479 } 7480 7481 static void nfs4_free_pages(struct page **pages, size_t size) 7482 { 7483 int i; 7484 7485 if (!pages) 7486 return; 7487 7488 for (i = 0; i < size; i++) { 7489 if (!pages[i]) 7490 break; 7491 __free_page(pages[i]); 7492 } 7493 kfree(pages); 7494 } 7495 7496 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags) 7497 { 7498 struct page **pages; 7499 int i; 7500 7501 pages = kcalloc(size, sizeof(struct page *), gfp_flags); 7502 if (!pages) { 7503 dprintk("%s: can't alloc array of %zu pages\n", __func__, size); 7504 return NULL; 7505 } 7506 7507 for (i = 0; i < size; i++) { 7508 pages[i] = alloc_page(gfp_flags); 7509 if (!pages[i]) { 7510 dprintk("%s: failed to allocate page\n", __func__); 7511 nfs4_free_pages(pages, size); 7512 return NULL; 7513 } 7514 } 7515 7516 return pages; 7517 } 7518 7519 static void nfs4_layoutget_release(void *calldata) 7520 { 7521 struct nfs4_layoutget *lgp = calldata; 7522 struct inode *inode = lgp->args.inode; 7523 struct nfs_server *server = NFS_SERVER(inode); 7524 size_t max_pages = max_response_pages(server); 7525 7526 dprintk("--> %s\n", __func__); 7527 nfs4_free_pages(lgp->args.layout.pages, max_pages); 7528 pnfs_put_layout_hdr(NFS_I(inode)->layout); 7529 put_nfs_open_context(lgp->args.ctx); 7530 kfree(calldata); 7531 dprintk("<-- %s\n", __func__); 7532 } 7533 7534 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 7535 .rpc_call_prepare = nfs4_layoutget_prepare, 7536 .rpc_call_done = nfs4_layoutget_done, 7537 .rpc_release = nfs4_layoutget_release, 7538 }; 7539 7540 struct pnfs_layout_segment * 7541 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags) 7542 { 7543 struct inode *inode = lgp->args.inode; 7544 struct nfs_server *server = NFS_SERVER(inode); 7545 size_t max_pages = max_response_pages(server); 7546 struct rpc_task *task; 7547 struct rpc_message msg = { 7548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 7549 .rpc_argp = &lgp->args, 7550 .rpc_resp = &lgp->res, 7551 .rpc_cred = lgp->cred, 7552 }; 7553 struct rpc_task_setup task_setup_data = { 7554 .rpc_client = server->client, 7555 .rpc_message = &msg, 7556 .callback_ops = &nfs4_layoutget_call_ops, 7557 .callback_data = lgp, 7558 .flags = RPC_TASK_ASYNC, 7559 }; 7560 struct pnfs_layout_segment *lseg = NULL; 7561 int status = 0; 7562 7563 dprintk("--> %s\n", __func__); 7564 7565 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags); 7566 if (!lgp->args.layout.pages) { 7567 nfs4_layoutget_release(lgp); 7568 return ERR_PTR(-ENOMEM); 7569 } 7570 lgp->args.layout.pglen = max_pages * PAGE_SIZE; 7571 lgp->args.timestamp = jiffies; 7572 7573 lgp->res.layoutp = &lgp->args.layout; 7574 lgp->res.seq_res.sr_slot = NULL; 7575 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0); 7576 7577 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ 7578 pnfs_get_layout_hdr(NFS_I(inode)->layout); 7579 7580 task = rpc_run_task(&task_setup_data); 7581 if (IS_ERR(task)) 7582 return ERR_CAST(task); 7583 status = nfs4_wait_for_completion_rpc_task(task); 7584 if (status == 0) 7585 status = task->tk_status; 7586 trace_nfs4_layoutget(lgp->args.ctx, 7587 &lgp->args.range, 7588 &lgp->res.range, 7589 status); 7590 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */ 7591 if (status == 0 && lgp->res.layoutp->len) 7592 lseg = pnfs_layout_process(lgp); 7593 rpc_put_task(task); 7594 dprintk("<-- %s status=%d\n", __func__, status); 7595 if (status) 7596 return ERR_PTR(status); 7597 return lseg; 7598 } 7599 7600 static void 7601 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 7602 { 7603 struct nfs4_layoutreturn *lrp = calldata; 7604 7605 dprintk("--> %s\n", __func__); 7606 nfs41_setup_sequence(lrp->clp->cl_session, 7607 &lrp->args.seq_args, 7608 &lrp->res.seq_res, 7609 task); 7610 } 7611 7612 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 7613 { 7614 struct nfs4_layoutreturn *lrp = calldata; 7615 struct nfs_server *server; 7616 7617 dprintk("--> %s\n", __func__); 7618 7619 if (!nfs41_sequence_done(task, &lrp->res.seq_res)) 7620 return; 7621 7622 server = NFS_SERVER(lrp->args.inode); 7623 switch (task->tk_status) { 7624 default: 7625 task->tk_status = 0; 7626 case 0: 7627 break; 7628 case -NFS4ERR_DELAY: 7629 if (nfs4_async_handle_error(task, server, NULL) != -EAGAIN) 7630 break; 7631 rpc_restart_call_prepare(task); 7632 return; 7633 } 7634 dprintk("<-- %s\n", __func__); 7635 } 7636 7637 static void nfs4_layoutreturn_release(void *calldata) 7638 { 7639 struct nfs4_layoutreturn *lrp = calldata; 7640 struct pnfs_layout_hdr *lo = lrp->args.layout; 7641 7642 dprintk("--> %s\n", __func__); 7643 spin_lock(&lo->plh_inode->i_lock); 7644 if (lrp->res.lrs_present) 7645 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true); 7646 lo->plh_block_lgets--; 7647 spin_unlock(&lo->plh_inode->i_lock); 7648 pnfs_put_layout_hdr(lrp->args.layout); 7649 kfree(calldata); 7650 dprintk("<-- %s\n", __func__); 7651 } 7652 7653 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 7654 .rpc_call_prepare = nfs4_layoutreturn_prepare, 7655 .rpc_call_done = nfs4_layoutreturn_done, 7656 .rpc_release = nfs4_layoutreturn_release, 7657 }; 7658 7659 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp) 7660 { 7661 struct rpc_task *task; 7662 struct rpc_message msg = { 7663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 7664 .rpc_argp = &lrp->args, 7665 .rpc_resp = &lrp->res, 7666 .rpc_cred = lrp->cred, 7667 }; 7668 struct rpc_task_setup task_setup_data = { 7669 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 7670 .rpc_message = &msg, 7671 .callback_ops = &nfs4_layoutreturn_call_ops, 7672 .callback_data = lrp, 7673 }; 7674 int status; 7675 7676 dprintk("--> %s\n", __func__); 7677 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1); 7678 task = rpc_run_task(&task_setup_data); 7679 if (IS_ERR(task)) 7680 return PTR_ERR(task); 7681 status = task->tk_status; 7682 trace_nfs4_layoutreturn(lrp->args.inode, status); 7683 dprintk("<-- %s status=%d\n", __func__, status); 7684 rpc_put_task(task); 7685 return status; 7686 } 7687 7688 /* 7689 * Retrieve the list of Data Server devices from the MDS. 7690 */ 7691 static int _nfs4_getdevicelist(struct nfs_server *server, 7692 const struct nfs_fh *fh, 7693 struct pnfs_devicelist *devlist) 7694 { 7695 struct nfs4_getdevicelist_args args = { 7696 .fh = fh, 7697 .layoutclass = server->pnfs_curr_ld->id, 7698 }; 7699 struct nfs4_getdevicelist_res res = { 7700 .devlist = devlist, 7701 }; 7702 struct rpc_message msg = { 7703 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST], 7704 .rpc_argp = &args, 7705 .rpc_resp = &res, 7706 }; 7707 int status; 7708 7709 dprintk("--> %s\n", __func__); 7710 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, 7711 &res.seq_res, 0); 7712 dprintk("<-- %s status=%d\n", __func__, status); 7713 return status; 7714 } 7715 7716 int nfs4_proc_getdevicelist(struct nfs_server *server, 7717 const struct nfs_fh *fh, 7718 struct pnfs_devicelist *devlist) 7719 { 7720 struct nfs4_exception exception = { }; 7721 int err; 7722 7723 do { 7724 err = nfs4_handle_exception(server, 7725 _nfs4_getdevicelist(server, fh, devlist), 7726 &exception); 7727 } while (exception.retry); 7728 7729 dprintk("%s: err=%d, num_devs=%u\n", __func__, 7730 err, devlist->num_devs); 7731 7732 return err; 7733 } 7734 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist); 7735 7736 static int 7737 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 7738 struct pnfs_device *pdev, 7739 struct rpc_cred *cred) 7740 { 7741 struct nfs4_getdeviceinfo_args args = { 7742 .pdev = pdev, 7743 }; 7744 struct nfs4_getdeviceinfo_res res = { 7745 .pdev = pdev, 7746 }; 7747 struct rpc_message msg = { 7748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 7749 .rpc_argp = &args, 7750 .rpc_resp = &res, 7751 .rpc_cred = cred, 7752 }; 7753 int status; 7754 7755 dprintk("--> %s\n", __func__); 7756 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 7757 dprintk("<-- %s status=%d\n", __func__, status); 7758 7759 return status; 7760 } 7761 7762 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 7763 struct pnfs_device *pdev, 7764 struct rpc_cred *cred) 7765 { 7766 struct nfs4_exception exception = { }; 7767 int err; 7768 7769 do { 7770 err = nfs4_handle_exception(server, 7771 _nfs4_proc_getdeviceinfo(server, pdev, cred), 7772 &exception); 7773 } while (exception.retry); 7774 return err; 7775 } 7776 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 7777 7778 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 7779 { 7780 struct nfs4_layoutcommit_data *data = calldata; 7781 struct nfs_server *server = NFS_SERVER(data->args.inode); 7782 struct nfs4_session *session = nfs4_get_session(server); 7783 7784 nfs41_setup_sequence(session, 7785 &data->args.seq_args, 7786 &data->res.seq_res, 7787 task); 7788 } 7789 7790 static void 7791 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 7792 { 7793 struct nfs4_layoutcommit_data *data = calldata; 7794 struct nfs_server *server = NFS_SERVER(data->args.inode); 7795 7796 if (!nfs41_sequence_done(task, &data->res.seq_res)) 7797 return; 7798 7799 switch (task->tk_status) { /* Just ignore these failures */ 7800 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 7801 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 7802 case -NFS4ERR_BADLAYOUT: /* no layout */ 7803 case -NFS4ERR_GRACE: /* loca_recalim always false */ 7804 task->tk_status = 0; 7805 case 0: 7806 break; 7807 default: 7808 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) { 7809 rpc_restart_call_prepare(task); 7810 return; 7811 } 7812 } 7813 } 7814 7815 static void nfs4_layoutcommit_release(void *calldata) 7816 { 7817 struct nfs4_layoutcommit_data *data = calldata; 7818 7819 pnfs_cleanup_layoutcommit(data); 7820 nfs_post_op_update_inode_force_wcc(data->args.inode, 7821 data->res.fattr); 7822 put_rpccred(data->cred); 7823 kfree(data); 7824 } 7825 7826 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 7827 .rpc_call_prepare = nfs4_layoutcommit_prepare, 7828 .rpc_call_done = nfs4_layoutcommit_done, 7829 .rpc_release = nfs4_layoutcommit_release, 7830 }; 7831 7832 int 7833 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 7834 { 7835 struct rpc_message msg = { 7836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 7837 .rpc_argp = &data->args, 7838 .rpc_resp = &data->res, 7839 .rpc_cred = data->cred, 7840 }; 7841 struct rpc_task_setup task_setup_data = { 7842 .task = &data->task, 7843 .rpc_client = NFS_CLIENT(data->args.inode), 7844 .rpc_message = &msg, 7845 .callback_ops = &nfs4_layoutcommit_ops, 7846 .callback_data = data, 7847 .flags = RPC_TASK_ASYNC, 7848 }; 7849 struct rpc_task *task; 7850 int status = 0; 7851 7852 dprintk("NFS: %4d initiating layoutcommit call. sync %d " 7853 "lbw: %llu inode %lu\n", 7854 data->task.tk_pid, sync, 7855 data->args.lastbytewritten, 7856 data->args.inode->i_ino); 7857 7858 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 7859 task = rpc_run_task(&task_setup_data); 7860 if (IS_ERR(task)) 7861 return PTR_ERR(task); 7862 if (sync == false) 7863 goto out; 7864 status = nfs4_wait_for_completion_rpc_task(task); 7865 if (status != 0) 7866 goto out; 7867 status = task->tk_status; 7868 trace_nfs4_layoutcommit(data->args.inode, status); 7869 out: 7870 dprintk("%s: status %d\n", __func__, status); 7871 rpc_put_task(task); 7872 return status; 7873 } 7874 7875 /** 7876 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 7877 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 7878 */ 7879 static int 7880 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 7881 struct nfs_fsinfo *info, 7882 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 7883 { 7884 struct nfs41_secinfo_no_name_args args = { 7885 .style = SECINFO_STYLE_CURRENT_FH, 7886 }; 7887 struct nfs4_secinfo_res res = { 7888 .flavors = flavors, 7889 }; 7890 struct rpc_message msg = { 7891 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 7892 .rpc_argp = &args, 7893 .rpc_resp = &res, 7894 }; 7895 struct rpc_clnt *clnt = server->client; 7896 struct rpc_cred *cred = NULL; 7897 int status; 7898 7899 if (use_integrity) { 7900 clnt = server->nfs_client->cl_rpcclient; 7901 cred = nfs4_get_clid_cred(server->nfs_client); 7902 msg.rpc_cred = cred; 7903 } 7904 7905 dprintk("--> %s\n", __func__); 7906 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 7907 &res.seq_res, 0); 7908 dprintk("<-- %s status=%d\n", __func__, status); 7909 7910 if (cred) 7911 put_rpccred(cred); 7912 7913 return status; 7914 } 7915 7916 static int 7917 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 7918 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 7919 { 7920 struct nfs4_exception exception = { }; 7921 int err; 7922 do { 7923 /* first try using integrity protection */ 7924 err = -NFS4ERR_WRONGSEC; 7925 7926 /* try to use integrity protection with machine cred */ 7927 if (_nfs4_is_integrity_protected(server->nfs_client)) 7928 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 7929 flavors, true); 7930 7931 /* 7932 * if unable to use integrity protection, or SECINFO with 7933 * integrity protection returns NFS4ERR_WRONGSEC (which is 7934 * disallowed by spec, but exists in deployed servers) use 7935 * the current filesystem's rpc_client and the user cred. 7936 */ 7937 if (err == -NFS4ERR_WRONGSEC) 7938 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 7939 flavors, false); 7940 7941 switch (err) { 7942 case 0: 7943 case -NFS4ERR_WRONGSEC: 7944 case -ENOTSUPP: 7945 goto out; 7946 default: 7947 err = nfs4_handle_exception(server, err, &exception); 7948 } 7949 } while (exception.retry); 7950 out: 7951 return err; 7952 } 7953 7954 static int 7955 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 7956 struct nfs_fsinfo *info) 7957 { 7958 int err; 7959 struct page *page; 7960 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 7961 struct nfs4_secinfo_flavors *flavors; 7962 struct nfs4_secinfo4 *secinfo; 7963 int i; 7964 7965 page = alloc_page(GFP_KERNEL); 7966 if (!page) { 7967 err = -ENOMEM; 7968 goto out; 7969 } 7970 7971 flavors = page_address(page); 7972 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 7973 7974 /* 7975 * Fall back on "guess and check" method if 7976 * the server doesn't support SECINFO_NO_NAME 7977 */ 7978 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 7979 err = nfs4_find_root_sec(server, fhandle, info); 7980 goto out_freepage; 7981 } 7982 if (err) 7983 goto out_freepage; 7984 7985 for (i = 0; i < flavors->num_flavors; i++) { 7986 secinfo = &flavors->flavors[i]; 7987 7988 switch (secinfo->flavor) { 7989 case RPC_AUTH_NULL: 7990 case RPC_AUTH_UNIX: 7991 case RPC_AUTH_GSS: 7992 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 7993 &secinfo->flavor_info); 7994 break; 7995 default: 7996 flavor = RPC_AUTH_MAXFLAVOR; 7997 break; 7998 } 7999 8000 if (!nfs_auth_info_match(&server->auth_info, flavor)) 8001 flavor = RPC_AUTH_MAXFLAVOR; 8002 8003 if (flavor != RPC_AUTH_MAXFLAVOR) { 8004 err = nfs4_lookup_root_sec(server, fhandle, 8005 info, flavor); 8006 if (!err) 8007 break; 8008 } 8009 } 8010 8011 if (flavor == RPC_AUTH_MAXFLAVOR) 8012 err = -EPERM; 8013 8014 out_freepage: 8015 put_page(page); 8016 if (err == -EACCES) 8017 return -EPERM; 8018 out: 8019 return err; 8020 } 8021 8022 static int _nfs41_test_stateid(struct nfs_server *server, 8023 nfs4_stateid *stateid, 8024 struct rpc_cred *cred) 8025 { 8026 int status; 8027 struct nfs41_test_stateid_args args = { 8028 .stateid = stateid, 8029 }; 8030 struct nfs41_test_stateid_res res; 8031 struct rpc_message msg = { 8032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 8033 .rpc_argp = &args, 8034 .rpc_resp = &res, 8035 .rpc_cred = cred, 8036 }; 8037 struct rpc_clnt *rpc_client = server->client; 8038 8039 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 8040 &rpc_client, &msg); 8041 8042 dprintk("NFS call test_stateid %p\n", stateid); 8043 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 8044 nfs4_set_sequence_privileged(&args.seq_args); 8045 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 8046 &args.seq_args, &res.seq_res); 8047 if (status != NFS_OK) { 8048 dprintk("NFS reply test_stateid: failed, %d\n", status); 8049 return status; 8050 } 8051 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 8052 return -res.status; 8053 } 8054 8055 /** 8056 * nfs41_test_stateid - perform a TEST_STATEID operation 8057 * 8058 * @server: server / transport on which to perform the operation 8059 * @stateid: state ID to test 8060 * @cred: credential 8061 * 8062 * Returns NFS_OK if the server recognizes that "stateid" is valid. 8063 * Otherwise a negative NFS4ERR value is returned if the operation 8064 * failed or the state ID is not currently valid. 8065 */ 8066 static int nfs41_test_stateid(struct nfs_server *server, 8067 nfs4_stateid *stateid, 8068 struct rpc_cred *cred) 8069 { 8070 struct nfs4_exception exception = { }; 8071 int err; 8072 do { 8073 err = _nfs41_test_stateid(server, stateid, cred); 8074 if (err != -NFS4ERR_DELAY) 8075 break; 8076 nfs4_handle_exception(server, err, &exception); 8077 } while (exception.retry); 8078 return err; 8079 } 8080 8081 struct nfs_free_stateid_data { 8082 struct nfs_server *server; 8083 struct nfs41_free_stateid_args args; 8084 struct nfs41_free_stateid_res res; 8085 }; 8086 8087 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 8088 { 8089 struct nfs_free_stateid_data *data = calldata; 8090 nfs41_setup_sequence(nfs4_get_session(data->server), 8091 &data->args.seq_args, 8092 &data->res.seq_res, 8093 task); 8094 } 8095 8096 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 8097 { 8098 struct nfs_free_stateid_data *data = calldata; 8099 8100 nfs41_sequence_done(task, &data->res.seq_res); 8101 8102 switch (task->tk_status) { 8103 case -NFS4ERR_DELAY: 8104 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN) 8105 rpc_restart_call_prepare(task); 8106 } 8107 } 8108 8109 static void nfs41_free_stateid_release(void *calldata) 8110 { 8111 kfree(calldata); 8112 } 8113 8114 static const struct rpc_call_ops nfs41_free_stateid_ops = { 8115 .rpc_call_prepare = nfs41_free_stateid_prepare, 8116 .rpc_call_done = nfs41_free_stateid_done, 8117 .rpc_release = nfs41_free_stateid_release, 8118 }; 8119 8120 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server, 8121 nfs4_stateid *stateid, 8122 struct rpc_cred *cred, 8123 bool privileged) 8124 { 8125 struct rpc_message msg = { 8126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 8127 .rpc_cred = cred, 8128 }; 8129 struct rpc_task_setup task_setup = { 8130 .rpc_client = server->client, 8131 .rpc_message = &msg, 8132 .callback_ops = &nfs41_free_stateid_ops, 8133 .flags = RPC_TASK_ASYNC, 8134 }; 8135 struct nfs_free_stateid_data *data; 8136 8137 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 8138 &task_setup.rpc_client, &msg); 8139 8140 dprintk("NFS call free_stateid %p\n", stateid); 8141 data = kmalloc(sizeof(*data), GFP_NOFS); 8142 if (!data) 8143 return ERR_PTR(-ENOMEM); 8144 data->server = server; 8145 nfs4_stateid_copy(&data->args.stateid, stateid); 8146 8147 task_setup.callback_data = data; 8148 8149 msg.rpc_argp = &data->args; 8150 msg.rpc_resp = &data->res; 8151 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 8152 if (privileged) 8153 nfs4_set_sequence_privileged(&data->args.seq_args); 8154 8155 return rpc_run_task(&task_setup); 8156 } 8157 8158 /** 8159 * nfs41_free_stateid - perform a FREE_STATEID operation 8160 * 8161 * @server: server / transport on which to perform the operation 8162 * @stateid: state ID to release 8163 * @cred: credential 8164 * 8165 * Returns NFS_OK if the server freed "stateid". Otherwise a 8166 * negative NFS4ERR value is returned. 8167 */ 8168 static int nfs41_free_stateid(struct nfs_server *server, 8169 nfs4_stateid *stateid, 8170 struct rpc_cred *cred) 8171 { 8172 struct rpc_task *task; 8173 int ret; 8174 8175 task = _nfs41_free_stateid(server, stateid, cred, true); 8176 if (IS_ERR(task)) 8177 return PTR_ERR(task); 8178 ret = rpc_wait_for_completion_task(task); 8179 if (!ret) 8180 ret = task->tk_status; 8181 rpc_put_task(task); 8182 return ret; 8183 } 8184 8185 static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 8186 { 8187 struct rpc_task *task; 8188 struct rpc_cred *cred = lsp->ls_state->owner->so_cred; 8189 8190 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 8191 nfs4_free_lock_state(server, lsp); 8192 if (IS_ERR(task)) 8193 return PTR_ERR(task); 8194 rpc_put_task(task); 8195 return 0; 8196 } 8197 8198 static bool nfs41_match_stateid(const nfs4_stateid *s1, 8199 const nfs4_stateid *s2) 8200 { 8201 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 8202 return false; 8203 8204 if (s1->seqid == s2->seqid) 8205 return true; 8206 if (s1->seqid == 0 || s2->seqid == 0) 8207 return true; 8208 8209 return false; 8210 } 8211 8212 #endif /* CONFIG_NFS_V4_1 */ 8213 8214 static bool nfs4_match_stateid(const nfs4_stateid *s1, 8215 const nfs4_stateid *s2) 8216 { 8217 return nfs4_stateid_match(s1, s2); 8218 } 8219 8220 8221 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 8222 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 8223 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 8224 .recover_open = nfs4_open_reclaim, 8225 .recover_lock = nfs4_lock_reclaim, 8226 .establish_clid = nfs4_init_clientid, 8227 .detect_trunking = nfs40_discover_server_trunking, 8228 }; 8229 8230 #if defined(CONFIG_NFS_V4_1) 8231 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 8232 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 8233 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 8234 .recover_open = nfs4_open_reclaim, 8235 .recover_lock = nfs4_lock_reclaim, 8236 .establish_clid = nfs41_init_clientid, 8237 .reclaim_complete = nfs41_proc_reclaim_complete, 8238 .detect_trunking = nfs41_discover_server_trunking, 8239 }; 8240 #endif /* CONFIG_NFS_V4_1 */ 8241 8242 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 8243 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 8244 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 8245 .recover_open = nfs4_open_expired, 8246 .recover_lock = nfs4_lock_expired, 8247 .establish_clid = nfs4_init_clientid, 8248 }; 8249 8250 #if defined(CONFIG_NFS_V4_1) 8251 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 8252 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 8253 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 8254 .recover_open = nfs41_open_expired, 8255 .recover_lock = nfs41_lock_expired, 8256 .establish_clid = nfs41_init_clientid, 8257 }; 8258 #endif /* CONFIG_NFS_V4_1 */ 8259 8260 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 8261 .sched_state_renewal = nfs4_proc_async_renew, 8262 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, 8263 .renew_lease = nfs4_proc_renew, 8264 }; 8265 8266 #if defined(CONFIG_NFS_V4_1) 8267 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 8268 .sched_state_renewal = nfs41_proc_async_sequence, 8269 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, 8270 .renew_lease = nfs4_proc_sequence, 8271 }; 8272 #endif 8273 8274 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 8275 .get_locations = _nfs40_proc_get_locations, 8276 .fsid_present = _nfs40_proc_fsid_present, 8277 }; 8278 8279 #if defined(CONFIG_NFS_V4_1) 8280 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 8281 .get_locations = _nfs41_proc_get_locations, 8282 .fsid_present = _nfs41_proc_fsid_present, 8283 }; 8284 #endif /* CONFIG_NFS_V4_1 */ 8285 8286 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 8287 .minor_version = 0, 8288 .init_caps = NFS_CAP_READDIRPLUS 8289 | NFS_CAP_ATOMIC_OPEN 8290 | NFS_CAP_CHANGE_ATTR 8291 | NFS_CAP_POSIX_LOCK, 8292 .init_client = nfs40_init_client, 8293 .shutdown_client = nfs40_shutdown_client, 8294 .match_stateid = nfs4_match_stateid, 8295 .find_root_sec = nfs4_find_root_sec, 8296 .free_lock_state = nfs4_release_lockowner, 8297 .call_sync_ops = &nfs40_call_sync_ops, 8298 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 8299 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 8300 .state_renewal_ops = &nfs40_state_renewal_ops, 8301 .mig_recovery_ops = &nfs40_mig_recovery_ops, 8302 }; 8303 8304 #if defined(CONFIG_NFS_V4_1) 8305 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 8306 .minor_version = 1, 8307 .init_caps = NFS_CAP_READDIRPLUS 8308 | NFS_CAP_ATOMIC_OPEN 8309 | NFS_CAP_CHANGE_ATTR 8310 | NFS_CAP_POSIX_LOCK 8311 | NFS_CAP_STATEID_NFSV41 8312 | NFS_CAP_ATOMIC_OPEN_V1, 8313 .init_client = nfs41_init_client, 8314 .shutdown_client = nfs41_shutdown_client, 8315 .match_stateid = nfs41_match_stateid, 8316 .find_root_sec = nfs41_find_root_sec, 8317 .free_lock_state = nfs41_free_lock_state, 8318 .call_sync_ops = &nfs41_call_sync_ops, 8319 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 8320 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 8321 .state_renewal_ops = &nfs41_state_renewal_ops, 8322 .mig_recovery_ops = &nfs41_mig_recovery_ops, 8323 }; 8324 #endif 8325 8326 #if defined(CONFIG_NFS_V4_2) 8327 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 8328 .minor_version = 2, 8329 .init_caps = NFS_CAP_READDIRPLUS 8330 | NFS_CAP_ATOMIC_OPEN 8331 | NFS_CAP_CHANGE_ATTR 8332 | NFS_CAP_POSIX_LOCK 8333 | NFS_CAP_STATEID_NFSV41 8334 | NFS_CAP_ATOMIC_OPEN_V1, 8335 .init_client = nfs41_init_client, 8336 .shutdown_client = nfs41_shutdown_client, 8337 .match_stateid = nfs41_match_stateid, 8338 .find_root_sec = nfs41_find_root_sec, 8339 .free_lock_state = nfs41_free_lock_state, 8340 .call_sync_ops = &nfs41_call_sync_ops, 8341 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 8342 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 8343 .state_renewal_ops = &nfs41_state_renewal_ops, 8344 }; 8345 #endif 8346 8347 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 8348 [0] = &nfs_v4_0_minor_ops, 8349 #if defined(CONFIG_NFS_V4_1) 8350 [1] = &nfs_v4_1_minor_ops, 8351 #endif 8352 #if defined(CONFIG_NFS_V4_2) 8353 [2] = &nfs_v4_2_minor_ops, 8354 #endif 8355 }; 8356 8357 static const struct inode_operations nfs4_dir_inode_operations = { 8358 .create = nfs_create, 8359 .lookup = nfs_lookup, 8360 .atomic_open = nfs_atomic_open, 8361 .link = nfs_link, 8362 .unlink = nfs_unlink, 8363 .symlink = nfs_symlink, 8364 .mkdir = nfs_mkdir, 8365 .rmdir = nfs_rmdir, 8366 .mknod = nfs_mknod, 8367 .rename = nfs_rename, 8368 .permission = nfs_permission, 8369 .getattr = nfs_getattr, 8370 .setattr = nfs_setattr, 8371 .getxattr = generic_getxattr, 8372 .setxattr = generic_setxattr, 8373 .listxattr = generic_listxattr, 8374 .removexattr = generic_removexattr, 8375 }; 8376 8377 static const struct inode_operations nfs4_file_inode_operations = { 8378 .permission = nfs_permission, 8379 .getattr = nfs_getattr, 8380 .setattr = nfs_setattr, 8381 .getxattr = generic_getxattr, 8382 .setxattr = generic_setxattr, 8383 .listxattr = generic_listxattr, 8384 .removexattr = generic_removexattr, 8385 }; 8386 8387 const struct nfs_rpc_ops nfs_v4_clientops = { 8388 .version = 4, /* protocol version */ 8389 .dentry_ops = &nfs4_dentry_operations, 8390 .dir_inode_ops = &nfs4_dir_inode_operations, 8391 .file_inode_ops = &nfs4_file_inode_operations, 8392 .file_ops = &nfs4_file_operations, 8393 .getroot = nfs4_proc_get_root, 8394 .submount = nfs4_submount, 8395 .try_mount = nfs4_try_mount, 8396 .getattr = nfs4_proc_getattr, 8397 .setattr = nfs4_proc_setattr, 8398 .lookup = nfs4_proc_lookup, 8399 .access = nfs4_proc_access, 8400 .readlink = nfs4_proc_readlink, 8401 .create = nfs4_proc_create, 8402 .remove = nfs4_proc_remove, 8403 .unlink_setup = nfs4_proc_unlink_setup, 8404 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 8405 .unlink_done = nfs4_proc_unlink_done, 8406 .rename_setup = nfs4_proc_rename_setup, 8407 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 8408 .rename_done = nfs4_proc_rename_done, 8409 .link = nfs4_proc_link, 8410 .symlink = nfs4_proc_symlink, 8411 .mkdir = nfs4_proc_mkdir, 8412 .rmdir = nfs4_proc_remove, 8413 .readdir = nfs4_proc_readdir, 8414 .mknod = nfs4_proc_mknod, 8415 .statfs = nfs4_proc_statfs, 8416 .fsinfo = nfs4_proc_fsinfo, 8417 .pathconf = nfs4_proc_pathconf, 8418 .set_capabilities = nfs4_server_capabilities, 8419 .decode_dirent = nfs4_decode_dirent, 8420 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 8421 .read_setup = nfs4_proc_read_setup, 8422 .read_done = nfs4_read_done, 8423 .write_setup = nfs4_proc_write_setup, 8424 .write_done = nfs4_write_done, 8425 .commit_setup = nfs4_proc_commit_setup, 8426 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 8427 .commit_done = nfs4_commit_done, 8428 .lock = nfs4_proc_lock, 8429 .clear_acl_cache = nfs4_zap_acl_attr, 8430 .close_context = nfs4_close_context, 8431 .open_context = nfs4_atomic_open, 8432 .have_delegation = nfs4_have_delegation, 8433 .return_delegation = nfs4_inode_return_delegation, 8434 .alloc_client = nfs4_alloc_client, 8435 .init_client = nfs4_init_client, 8436 .free_client = nfs4_free_client, 8437 .create_server = nfs4_create_server, 8438 .clone_server = nfs_clone_server, 8439 }; 8440 8441 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 8442 .prefix = XATTR_NAME_NFSV4_ACL, 8443 .list = nfs4_xattr_list_nfs4_acl, 8444 .get = nfs4_xattr_get_nfs4_acl, 8445 .set = nfs4_xattr_set_nfs4_acl, 8446 }; 8447 8448 const struct xattr_handler *nfs4_xattr_handlers[] = { 8449 &nfs4_xattr_nfs4_acl_handler, 8450 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 8451 &nfs4_xattr_nfs4_label_handler, 8452 #endif 8453 NULL 8454 }; 8455 8456 /* 8457 * Local variables: 8458 * c-basic-offset: 8 8459 * End: 8460 */ 8461