1 /* 2 * fs/nfs/nfs4proc.c 3 * 4 * Client-side procedure declarations for NFSv4. 5 * 6 * Copyright (c) 2002 The Regents of the University of Michigan. 7 * All rights reserved. 8 * 9 * Kendrick Smith <kmsmith@umich.edu> 10 * Andy Adamson <andros@umich.edu> 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its 22 * contributors may be used to endorse or promote products derived 23 * from this software without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <linux/mm.h> 39 #include <linux/delay.h> 40 #include <linux/errno.h> 41 #include <linux/file.h> 42 #include <linux/string.h> 43 #include <linux/ratelimit.h> 44 #include <linux/printk.h> 45 #include <linux/slab.h> 46 #include <linux/sunrpc/clnt.h> 47 #include <linux/nfs.h> 48 #include <linux/nfs4.h> 49 #include <linux/nfs_fs.h> 50 #include <linux/nfs_page.h> 51 #include <linux/nfs_mount.h> 52 #include <linux/namei.h> 53 #include <linux/mount.h> 54 #include <linux/module.h> 55 #include <linux/xattr.h> 56 #include <linux/utsname.h> 57 #include <linux/freezer.h> 58 59 #include "nfs4_fs.h" 60 #include "delegation.h" 61 #include "internal.h" 62 #include "iostat.h" 63 #include "callback.h" 64 #include "pnfs.h" 65 #include "netns.h" 66 #include "nfs4idmap.h" 67 #include "nfs4session.h" 68 #include "fscache.h" 69 70 #include "nfs4trace.h" 71 72 #define NFSDBG_FACILITY NFSDBG_PROC 73 74 #define NFS4_POLL_RETRY_MIN (HZ/10) 75 #define NFS4_POLL_RETRY_MAX (15*HZ) 76 77 /* file attributes which can be mapped to nfs attributes */ 78 #define NFS4_VALID_ATTRS (ATTR_MODE \ 79 | ATTR_UID \ 80 | ATTR_GID \ 81 | ATTR_SIZE \ 82 | ATTR_ATIME \ 83 | ATTR_MTIME \ 84 | ATTR_CTIME \ 85 | ATTR_ATIME_SET \ 86 | ATTR_MTIME_SET) 87 88 struct nfs4_opendata; 89 static int _nfs4_proc_open(struct nfs4_opendata *data); 90 static int _nfs4_recover_proc_open(struct nfs4_opendata *data); 91 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *); 92 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr); 93 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label); 94 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label); 95 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 96 struct nfs_fattr *fattr, struct iattr *sattr, 97 struct nfs4_state *state, struct nfs4_label *ilabel, 98 struct nfs4_label *olabel); 99 #ifdef CONFIG_NFS_V4_1 100 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *, 101 struct rpc_cred *); 102 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *, 103 struct rpc_cred *, bool); 104 #endif 105 106 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 107 static inline struct nfs4_label * 108 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 109 struct iattr *sattr, struct nfs4_label *label) 110 { 111 int err; 112 113 if (label == NULL) 114 return NULL; 115 116 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) 117 return NULL; 118 119 err = security_dentry_init_security(dentry, sattr->ia_mode, 120 &dentry->d_name, (void **)&label->label, &label->len); 121 if (err == 0) 122 return label; 123 124 return NULL; 125 } 126 static inline void 127 nfs4_label_release_security(struct nfs4_label *label) 128 { 129 if (label) 130 security_release_secctx(label->label, label->len); 131 } 132 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 133 { 134 if (label) 135 return server->attr_bitmask; 136 137 return server->attr_bitmask_nl; 138 } 139 #else 140 static inline struct nfs4_label * 141 nfs4_label_init_security(struct inode *dir, struct dentry *dentry, 142 struct iattr *sattr, struct nfs4_label *l) 143 { return NULL; } 144 static inline void 145 nfs4_label_release_security(struct nfs4_label *label) 146 { return; } 147 static inline u32 * 148 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) 149 { return server->attr_bitmask; } 150 #endif 151 152 /* Prevent leaks of NFSv4 errors into userland */ 153 static int nfs4_map_errors(int err) 154 { 155 if (err >= -1000) 156 return err; 157 switch (err) { 158 case -NFS4ERR_RESOURCE: 159 case -NFS4ERR_LAYOUTTRYLATER: 160 case -NFS4ERR_RECALLCONFLICT: 161 return -EREMOTEIO; 162 case -NFS4ERR_WRONGSEC: 163 case -NFS4ERR_WRONG_CRED: 164 return -EPERM; 165 case -NFS4ERR_BADOWNER: 166 case -NFS4ERR_BADNAME: 167 return -EINVAL; 168 case -NFS4ERR_SHARE_DENIED: 169 return -EACCES; 170 case -NFS4ERR_MINOR_VERS_MISMATCH: 171 return -EPROTONOSUPPORT; 172 case -NFS4ERR_FILE_OPEN: 173 return -EBUSY; 174 default: 175 dprintk("%s could not handle NFSv4 error %d\n", 176 __func__, -err); 177 break; 178 } 179 return -EIO; 180 } 181 182 /* 183 * This is our standard bitmap for GETATTR requests. 184 */ 185 const u32 nfs4_fattr_bitmap[3] = { 186 FATTR4_WORD0_TYPE 187 | FATTR4_WORD0_CHANGE 188 | FATTR4_WORD0_SIZE 189 | FATTR4_WORD0_FSID 190 | FATTR4_WORD0_FILEID, 191 FATTR4_WORD1_MODE 192 | FATTR4_WORD1_NUMLINKS 193 | FATTR4_WORD1_OWNER 194 | FATTR4_WORD1_OWNER_GROUP 195 | FATTR4_WORD1_RAWDEV 196 | FATTR4_WORD1_SPACE_USED 197 | FATTR4_WORD1_TIME_ACCESS 198 | FATTR4_WORD1_TIME_METADATA 199 | FATTR4_WORD1_TIME_MODIFY 200 | FATTR4_WORD1_MOUNTED_ON_FILEID, 201 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 202 FATTR4_WORD2_SECURITY_LABEL 203 #endif 204 }; 205 206 static const u32 nfs4_pnfs_open_bitmap[3] = { 207 FATTR4_WORD0_TYPE 208 | FATTR4_WORD0_CHANGE 209 | FATTR4_WORD0_SIZE 210 | FATTR4_WORD0_FSID 211 | FATTR4_WORD0_FILEID, 212 FATTR4_WORD1_MODE 213 | FATTR4_WORD1_NUMLINKS 214 | FATTR4_WORD1_OWNER 215 | FATTR4_WORD1_OWNER_GROUP 216 | FATTR4_WORD1_RAWDEV 217 | FATTR4_WORD1_SPACE_USED 218 | FATTR4_WORD1_TIME_ACCESS 219 | FATTR4_WORD1_TIME_METADATA 220 | FATTR4_WORD1_TIME_MODIFY, 221 FATTR4_WORD2_MDSTHRESHOLD 222 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 223 | FATTR4_WORD2_SECURITY_LABEL 224 #endif 225 }; 226 227 static const u32 nfs4_open_noattr_bitmap[3] = { 228 FATTR4_WORD0_TYPE 229 | FATTR4_WORD0_CHANGE 230 | FATTR4_WORD0_FILEID, 231 }; 232 233 const u32 nfs4_statfs_bitmap[3] = { 234 FATTR4_WORD0_FILES_AVAIL 235 | FATTR4_WORD0_FILES_FREE 236 | FATTR4_WORD0_FILES_TOTAL, 237 FATTR4_WORD1_SPACE_AVAIL 238 | FATTR4_WORD1_SPACE_FREE 239 | FATTR4_WORD1_SPACE_TOTAL 240 }; 241 242 const u32 nfs4_pathconf_bitmap[3] = { 243 FATTR4_WORD0_MAXLINK 244 | FATTR4_WORD0_MAXNAME, 245 0 246 }; 247 248 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE 249 | FATTR4_WORD0_MAXREAD 250 | FATTR4_WORD0_MAXWRITE 251 | FATTR4_WORD0_LEASE_TIME, 252 FATTR4_WORD1_TIME_DELTA 253 | FATTR4_WORD1_FS_LAYOUT_TYPES, 254 FATTR4_WORD2_LAYOUT_BLKSIZE 255 | FATTR4_WORD2_CLONE_BLKSIZE 256 }; 257 258 const u32 nfs4_fs_locations_bitmap[3] = { 259 FATTR4_WORD0_TYPE 260 | FATTR4_WORD0_CHANGE 261 | FATTR4_WORD0_SIZE 262 | FATTR4_WORD0_FSID 263 | FATTR4_WORD0_FILEID 264 | FATTR4_WORD0_FS_LOCATIONS, 265 FATTR4_WORD1_MODE 266 | FATTR4_WORD1_NUMLINKS 267 | FATTR4_WORD1_OWNER 268 | FATTR4_WORD1_OWNER_GROUP 269 | FATTR4_WORD1_RAWDEV 270 | FATTR4_WORD1_SPACE_USED 271 | FATTR4_WORD1_TIME_ACCESS 272 | FATTR4_WORD1_TIME_METADATA 273 | FATTR4_WORD1_TIME_MODIFY 274 | FATTR4_WORD1_MOUNTED_ON_FILEID, 275 }; 276 277 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry, 278 struct nfs4_readdir_arg *readdir) 279 { 280 __be32 *start, *p; 281 282 if (cookie > 2) { 283 readdir->cookie = cookie; 284 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier)); 285 return; 286 } 287 288 readdir->cookie = 0; 289 memset(&readdir->verifier, 0, sizeof(readdir->verifier)); 290 if (cookie == 2) 291 return; 292 293 /* 294 * NFSv4 servers do not return entries for '.' and '..' 295 * Therefore, we fake these entries here. We let '.' 296 * have cookie 0 and '..' have cookie 1. Note that 297 * when talking to the server, we always send cookie 0 298 * instead of 1 or 2. 299 */ 300 start = p = kmap_atomic(*readdir->pages); 301 302 if (cookie == 0) { 303 *p++ = xdr_one; /* next */ 304 *p++ = xdr_zero; /* cookie, first word */ 305 *p++ = xdr_one; /* cookie, second word */ 306 *p++ = xdr_one; /* entry len */ 307 memcpy(p, ".\0\0\0", 4); /* entry */ 308 p++; 309 *p++ = xdr_one; /* bitmap length */ 310 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ 311 *p++ = htonl(8); /* attribute buffer length */ 312 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry))); 313 } 314 315 *p++ = xdr_one; /* next */ 316 *p++ = xdr_zero; /* cookie, first word */ 317 *p++ = xdr_two; /* cookie, second word */ 318 *p++ = xdr_two; /* entry len */ 319 memcpy(p, "..\0\0", 4); /* entry */ 320 p++; 321 *p++ = xdr_one; /* bitmap length */ 322 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */ 323 *p++ = htonl(8); /* attribute buffer length */ 324 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent))); 325 326 readdir->pgbase = (char *)p - (char *)start; 327 readdir->count -= readdir->pgbase; 328 kunmap_atomic(start); 329 } 330 331 static void nfs4_test_and_free_stateid(struct nfs_server *server, 332 nfs4_stateid *stateid, 333 struct rpc_cred *cred) 334 { 335 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops; 336 337 ops->test_and_free_expired(server, stateid, cred); 338 } 339 340 static void __nfs4_free_revoked_stateid(struct nfs_server *server, 341 nfs4_stateid *stateid, 342 struct rpc_cred *cred) 343 { 344 stateid->type = NFS4_REVOKED_STATEID_TYPE; 345 nfs4_test_and_free_stateid(server, stateid, cred); 346 } 347 348 static void nfs4_free_revoked_stateid(struct nfs_server *server, 349 const nfs4_stateid *stateid, 350 struct rpc_cred *cred) 351 { 352 nfs4_stateid tmp; 353 354 nfs4_stateid_copy(&tmp, stateid); 355 __nfs4_free_revoked_stateid(server, &tmp, cred); 356 } 357 358 static long nfs4_update_delay(long *timeout) 359 { 360 long ret; 361 if (!timeout) 362 return NFS4_POLL_RETRY_MAX; 363 if (*timeout <= 0) 364 *timeout = NFS4_POLL_RETRY_MIN; 365 if (*timeout > NFS4_POLL_RETRY_MAX) 366 *timeout = NFS4_POLL_RETRY_MAX; 367 ret = *timeout; 368 *timeout <<= 1; 369 return ret; 370 } 371 372 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout) 373 { 374 int res = 0; 375 376 might_sleep(); 377 378 freezable_schedule_timeout_killable_unsafe( 379 nfs4_update_delay(timeout)); 380 if (fatal_signal_pending(current)) 381 res = -ERESTARTSYS; 382 return res; 383 } 384 385 /* This is the error handling routine for processes that are allowed 386 * to sleep. 387 */ 388 static int nfs4_do_handle_exception(struct nfs_server *server, 389 int errorcode, struct nfs4_exception *exception) 390 { 391 struct nfs_client *clp = server->nfs_client; 392 struct nfs4_state *state = exception->state; 393 const nfs4_stateid *stateid = exception->stateid; 394 struct inode *inode = exception->inode; 395 int ret = errorcode; 396 397 exception->delay = 0; 398 exception->recovering = 0; 399 exception->retry = 0; 400 401 if (stateid == NULL && state != NULL) 402 stateid = &state->stateid; 403 404 switch(errorcode) { 405 case 0: 406 return 0; 407 case -NFS4ERR_DELEG_REVOKED: 408 case -NFS4ERR_ADMIN_REVOKED: 409 case -NFS4ERR_EXPIRED: 410 case -NFS4ERR_BAD_STATEID: 411 if (inode != NULL && stateid != NULL) { 412 nfs_inode_find_state_and_recover(inode, 413 stateid); 414 goto wait_on_recovery; 415 } 416 case -NFS4ERR_OPENMODE: 417 if (inode) { 418 int err; 419 420 err = nfs_async_inode_return_delegation(inode, 421 stateid); 422 if (err == 0) 423 goto wait_on_recovery; 424 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) { 425 exception->retry = 1; 426 break; 427 } 428 } 429 if (state == NULL) 430 break; 431 ret = nfs4_schedule_stateid_recovery(server, state); 432 if (ret < 0) 433 break; 434 goto wait_on_recovery; 435 case -NFS4ERR_STALE_STATEID: 436 case -NFS4ERR_STALE_CLIENTID: 437 nfs4_schedule_lease_recovery(clp); 438 goto wait_on_recovery; 439 case -NFS4ERR_MOVED: 440 ret = nfs4_schedule_migration_recovery(server); 441 if (ret < 0) 442 break; 443 goto wait_on_recovery; 444 case -NFS4ERR_LEASE_MOVED: 445 nfs4_schedule_lease_moved_recovery(clp); 446 goto wait_on_recovery; 447 #if defined(CONFIG_NFS_V4_1) 448 case -NFS4ERR_BADSESSION: 449 case -NFS4ERR_BADSLOT: 450 case -NFS4ERR_BAD_HIGH_SLOT: 451 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 452 case -NFS4ERR_DEADSESSION: 453 case -NFS4ERR_SEQ_FALSE_RETRY: 454 case -NFS4ERR_SEQ_MISORDERED: 455 dprintk("%s ERROR: %d Reset session\n", __func__, 456 errorcode); 457 nfs4_schedule_session_recovery(clp->cl_session, errorcode); 458 goto wait_on_recovery; 459 #endif /* defined(CONFIG_NFS_V4_1) */ 460 case -NFS4ERR_FILE_OPEN: 461 if (exception->timeout > HZ) { 462 /* We have retried a decent amount, time to 463 * fail 464 */ 465 ret = -EBUSY; 466 break; 467 } 468 case -NFS4ERR_DELAY: 469 nfs_inc_server_stats(server, NFSIOS_DELAY); 470 case -NFS4ERR_GRACE: 471 case -NFS4ERR_LAYOUTTRYLATER: 472 case -NFS4ERR_RECALLCONFLICT: 473 exception->delay = 1; 474 return 0; 475 476 case -NFS4ERR_RETRY_UNCACHED_REP: 477 case -NFS4ERR_OLD_STATEID: 478 exception->retry = 1; 479 break; 480 case -NFS4ERR_BADOWNER: 481 /* The following works around a Linux server bug! */ 482 case -NFS4ERR_BADNAME: 483 if (server->caps & NFS_CAP_UIDGID_NOMAP) { 484 server->caps &= ~NFS_CAP_UIDGID_NOMAP; 485 exception->retry = 1; 486 printk(KERN_WARNING "NFS: v4 server %s " 487 "does not accept raw " 488 "uid/gids. " 489 "Reenabling the idmapper.\n", 490 server->nfs_client->cl_hostname); 491 } 492 } 493 /* We failed to handle the error */ 494 return nfs4_map_errors(ret); 495 wait_on_recovery: 496 exception->recovering = 1; 497 return 0; 498 } 499 500 /* This is the error handling routine for processes that are allowed 501 * to sleep. 502 */ 503 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception) 504 { 505 struct nfs_client *clp = server->nfs_client; 506 int ret; 507 508 ret = nfs4_do_handle_exception(server, errorcode, exception); 509 if (exception->delay) { 510 ret = nfs4_delay(server->client, &exception->timeout); 511 goto out_retry; 512 } 513 if (exception->recovering) { 514 ret = nfs4_wait_clnt_recover(clp); 515 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 516 return -EIO; 517 goto out_retry; 518 } 519 return ret; 520 out_retry: 521 if (ret == 0) 522 exception->retry = 1; 523 return ret; 524 } 525 526 static int 527 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server, 528 int errorcode, struct nfs4_exception *exception) 529 { 530 struct nfs_client *clp = server->nfs_client; 531 int ret; 532 533 ret = nfs4_do_handle_exception(server, errorcode, exception); 534 if (exception->delay) { 535 rpc_delay(task, nfs4_update_delay(&exception->timeout)); 536 goto out_retry; 537 } 538 if (exception->recovering) { 539 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL); 540 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0) 541 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task); 542 goto out_retry; 543 } 544 if (test_bit(NFS_MIG_FAILED, &server->mig_status)) 545 ret = -EIO; 546 return ret; 547 out_retry: 548 if (ret == 0) 549 exception->retry = 1; 550 return ret; 551 } 552 553 static int 554 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server, 555 struct nfs4_state *state, long *timeout) 556 { 557 struct nfs4_exception exception = { 558 .state = state, 559 }; 560 561 if (task->tk_status >= 0) 562 return 0; 563 if (timeout) 564 exception.timeout = *timeout; 565 task->tk_status = nfs4_async_handle_exception(task, server, 566 task->tk_status, 567 &exception); 568 if (exception.delay && timeout) 569 *timeout = exception.timeout; 570 if (exception.retry) 571 return -EAGAIN; 572 return 0; 573 } 574 575 /* 576 * Return 'true' if 'clp' is using an rpc_client that is integrity protected 577 * or 'false' otherwise. 578 */ 579 static bool _nfs4_is_integrity_protected(struct nfs_client *clp) 580 { 581 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor; 582 583 if (flavor == RPC_AUTH_GSS_KRB5I || 584 flavor == RPC_AUTH_GSS_KRB5P) 585 return true; 586 587 return false; 588 } 589 590 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp) 591 { 592 spin_lock(&clp->cl_lock); 593 if (time_before(clp->cl_last_renewal,timestamp)) 594 clp->cl_last_renewal = timestamp; 595 spin_unlock(&clp->cl_lock); 596 } 597 598 static void renew_lease(const struct nfs_server *server, unsigned long timestamp) 599 { 600 struct nfs_client *clp = server->nfs_client; 601 602 if (!nfs4_has_session(clp)) 603 do_renew_lease(clp, timestamp); 604 } 605 606 struct nfs4_call_sync_data { 607 const struct nfs_server *seq_server; 608 struct nfs4_sequence_args *seq_args; 609 struct nfs4_sequence_res *seq_res; 610 }; 611 612 void nfs4_init_sequence(struct nfs4_sequence_args *args, 613 struct nfs4_sequence_res *res, int cache_reply) 614 { 615 args->sa_slot = NULL; 616 args->sa_cache_this = cache_reply; 617 args->sa_privileged = 0; 618 619 res->sr_slot = NULL; 620 } 621 622 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args) 623 { 624 args->sa_privileged = 1; 625 } 626 627 int nfs40_setup_sequence(struct nfs4_slot_table *tbl, 628 struct nfs4_sequence_args *args, 629 struct nfs4_sequence_res *res, 630 struct rpc_task *task) 631 { 632 struct nfs4_slot *slot; 633 634 /* slot already allocated? */ 635 if (res->sr_slot != NULL) 636 goto out_start; 637 638 spin_lock(&tbl->slot_tbl_lock); 639 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged) 640 goto out_sleep; 641 642 slot = nfs4_alloc_slot(tbl); 643 if (IS_ERR(slot)) { 644 if (slot == ERR_PTR(-ENOMEM)) 645 task->tk_timeout = HZ >> 2; 646 goto out_sleep; 647 } 648 spin_unlock(&tbl->slot_tbl_lock); 649 650 slot->privileged = args->sa_privileged ? 1 : 0; 651 args->sa_slot = slot; 652 res->sr_slot = slot; 653 654 out_start: 655 rpc_call_start(task); 656 return 0; 657 658 out_sleep: 659 if (args->sa_privileged) 660 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 661 NULL, RPC_PRIORITY_PRIVILEGED); 662 else 663 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 664 spin_unlock(&tbl->slot_tbl_lock); 665 return -EAGAIN; 666 } 667 EXPORT_SYMBOL_GPL(nfs40_setup_sequence); 668 669 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res) 670 { 671 struct nfs4_slot *slot = res->sr_slot; 672 struct nfs4_slot_table *tbl; 673 674 tbl = slot->table; 675 spin_lock(&tbl->slot_tbl_lock); 676 if (!nfs41_wake_and_assign_slot(tbl, slot)) 677 nfs4_free_slot(tbl, slot); 678 spin_unlock(&tbl->slot_tbl_lock); 679 680 res->sr_slot = NULL; 681 } 682 683 static int nfs40_sequence_done(struct rpc_task *task, 684 struct nfs4_sequence_res *res) 685 { 686 if (res->sr_slot != NULL) 687 nfs40_sequence_free_slot(res); 688 return 1; 689 } 690 691 #if defined(CONFIG_NFS_V4_1) 692 693 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res) 694 { 695 struct nfs4_session *session; 696 struct nfs4_slot_table *tbl; 697 struct nfs4_slot *slot = res->sr_slot; 698 bool send_new_highest_used_slotid = false; 699 700 tbl = slot->table; 701 session = tbl->session; 702 703 /* Bump the slot sequence number */ 704 if (slot->seq_done) 705 slot->seq_nr++; 706 slot->seq_done = 0; 707 708 spin_lock(&tbl->slot_tbl_lock); 709 /* Be nice to the server: try to ensure that the last transmitted 710 * value for highest_user_slotid <= target_highest_slotid 711 */ 712 if (tbl->highest_used_slotid > tbl->target_highest_slotid) 713 send_new_highest_used_slotid = true; 714 715 if (nfs41_wake_and_assign_slot(tbl, slot)) { 716 send_new_highest_used_slotid = false; 717 goto out_unlock; 718 } 719 nfs4_free_slot(tbl, slot); 720 721 if (tbl->highest_used_slotid != NFS4_NO_SLOT) 722 send_new_highest_used_slotid = false; 723 out_unlock: 724 spin_unlock(&tbl->slot_tbl_lock); 725 res->sr_slot = NULL; 726 if (send_new_highest_used_slotid) 727 nfs41_notify_server(session->clp); 728 if (waitqueue_active(&tbl->slot_waitq)) 729 wake_up_all(&tbl->slot_waitq); 730 } 731 732 static int nfs41_sequence_process(struct rpc_task *task, 733 struct nfs4_sequence_res *res) 734 { 735 struct nfs4_session *session; 736 struct nfs4_slot *slot = res->sr_slot; 737 struct nfs_client *clp; 738 bool interrupted = false; 739 int ret = 1; 740 741 if (slot == NULL) 742 goto out_noaction; 743 /* don't increment the sequence number if the task wasn't sent */ 744 if (!RPC_WAS_SENT(task)) 745 goto out; 746 747 session = slot->table->session; 748 749 if (slot->interrupted) { 750 slot->interrupted = 0; 751 interrupted = true; 752 } 753 754 trace_nfs4_sequence_done(session, res); 755 /* Check the SEQUENCE operation status */ 756 switch (res->sr_status) { 757 case 0: 758 /* If previous op on slot was interrupted and we reused 759 * the seq# and got a reply from the cache, then retry 760 */ 761 if (task->tk_status == -EREMOTEIO && interrupted) { 762 ++slot->seq_nr; 763 goto retry_nowait; 764 } 765 /* Update the slot's sequence and clientid lease timer */ 766 slot->seq_done = 1; 767 clp = session->clp; 768 do_renew_lease(clp, res->sr_timestamp); 769 /* Check sequence flags */ 770 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags, 771 !!slot->privileged); 772 nfs41_update_target_slotid(slot->table, slot, res); 773 break; 774 case 1: 775 /* 776 * sr_status remains 1 if an RPC level error occurred. 777 * The server may or may not have processed the sequence 778 * operation.. 779 * Mark the slot as having hosted an interrupted RPC call. 780 */ 781 slot->interrupted = 1; 782 goto out; 783 case -NFS4ERR_DELAY: 784 /* The server detected a resend of the RPC call and 785 * returned NFS4ERR_DELAY as per Section 2.10.6.2 786 * of RFC5661. 787 */ 788 dprintk("%s: slot=%u seq=%u: Operation in progress\n", 789 __func__, 790 slot->slot_nr, 791 slot->seq_nr); 792 goto out_retry; 793 case -NFS4ERR_BADSLOT: 794 /* 795 * The slot id we used was probably retired. Try again 796 * using a different slot id. 797 */ 798 goto retry_nowait; 799 case -NFS4ERR_SEQ_MISORDERED: 800 /* 801 * Was the last operation on this sequence interrupted? 802 * If so, retry after bumping the sequence number. 803 */ 804 if (interrupted) { 805 ++slot->seq_nr; 806 goto retry_nowait; 807 } 808 /* 809 * Could this slot have been previously retired? 810 * If so, then the server may be expecting seq_nr = 1! 811 */ 812 if (slot->seq_nr != 1) { 813 slot->seq_nr = 1; 814 goto retry_nowait; 815 } 816 break; 817 case -NFS4ERR_SEQ_FALSE_RETRY: 818 ++slot->seq_nr; 819 goto retry_nowait; 820 default: 821 /* Just update the slot sequence no. */ 822 slot->seq_done = 1; 823 } 824 out: 825 /* The session may be reset by one of the error handlers. */ 826 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status); 827 out_noaction: 828 return ret; 829 retry_nowait: 830 if (rpc_restart_call_prepare(task)) { 831 nfs41_sequence_free_slot(res); 832 task->tk_status = 0; 833 ret = 0; 834 } 835 goto out; 836 out_retry: 837 if (!rpc_restart_call(task)) 838 goto out; 839 rpc_delay(task, NFS4_POLL_RETRY_MAX); 840 return 0; 841 } 842 843 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 844 { 845 if (!nfs41_sequence_process(task, res)) 846 return 0; 847 if (res->sr_slot != NULL) 848 nfs41_sequence_free_slot(res); 849 return 1; 850 851 } 852 EXPORT_SYMBOL_GPL(nfs41_sequence_done); 853 854 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 855 { 856 if (res->sr_slot == NULL) 857 return 1; 858 if (res->sr_slot->table->session != NULL) 859 return nfs41_sequence_process(task, res); 860 return nfs40_sequence_done(task, res); 861 } 862 863 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 864 { 865 if (res->sr_slot != NULL) { 866 if (res->sr_slot->table->session != NULL) 867 nfs41_sequence_free_slot(res); 868 else 869 nfs40_sequence_free_slot(res); 870 } 871 } 872 873 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res) 874 { 875 if (res->sr_slot == NULL) 876 return 1; 877 if (!res->sr_slot->table->session) 878 return nfs40_sequence_done(task, res); 879 return nfs41_sequence_done(task, res); 880 } 881 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 882 883 int nfs41_setup_sequence(struct nfs4_session *session, 884 struct nfs4_sequence_args *args, 885 struct nfs4_sequence_res *res, 886 struct rpc_task *task) 887 { 888 struct nfs4_slot *slot; 889 struct nfs4_slot_table *tbl; 890 891 dprintk("--> %s\n", __func__); 892 /* slot already allocated? */ 893 if (res->sr_slot != NULL) 894 goto out_success; 895 896 tbl = &session->fc_slot_table; 897 898 task->tk_timeout = 0; 899 900 spin_lock(&tbl->slot_tbl_lock); 901 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) && 902 !args->sa_privileged) { 903 /* The state manager will wait until the slot table is empty */ 904 dprintk("%s session is draining\n", __func__); 905 goto out_sleep; 906 } 907 908 slot = nfs4_alloc_slot(tbl); 909 if (IS_ERR(slot)) { 910 /* If out of memory, try again in 1/4 second */ 911 if (slot == ERR_PTR(-ENOMEM)) 912 task->tk_timeout = HZ >> 2; 913 dprintk("<-- %s: no free slots\n", __func__); 914 goto out_sleep; 915 } 916 spin_unlock(&tbl->slot_tbl_lock); 917 918 slot->privileged = args->sa_privileged ? 1 : 0; 919 args->sa_slot = slot; 920 921 dprintk("<-- %s slotid=%u seqid=%u\n", __func__, 922 slot->slot_nr, slot->seq_nr); 923 924 res->sr_slot = slot; 925 res->sr_timestamp = jiffies; 926 res->sr_status_flags = 0; 927 /* 928 * sr_status is only set in decode_sequence, and so will remain 929 * set to 1 if an rpc level failure occurs. 930 */ 931 res->sr_status = 1; 932 trace_nfs4_setup_sequence(session, args); 933 out_success: 934 rpc_call_start(task); 935 return 0; 936 out_sleep: 937 /* Privileged tasks are queued with top priority */ 938 if (args->sa_privileged) 939 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task, 940 NULL, RPC_PRIORITY_PRIVILEGED); 941 else 942 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL); 943 spin_unlock(&tbl->slot_tbl_lock); 944 return -EAGAIN; 945 } 946 EXPORT_SYMBOL_GPL(nfs41_setup_sequence); 947 948 static int nfs4_setup_sequence(const struct nfs_server *server, 949 struct nfs4_sequence_args *args, 950 struct nfs4_sequence_res *res, 951 struct rpc_task *task) 952 { 953 struct nfs4_session *session = nfs4_get_session(server); 954 int ret = 0; 955 956 if (!session) 957 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl, 958 args, res, task); 959 960 dprintk("--> %s clp %p session %p sr_slot %u\n", 961 __func__, session->clp, session, res->sr_slot ? 962 res->sr_slot->slot_nr : NFS4_NO_SLOT); 963 964 ret = nfs41_setup_sequence(session, args, res, task); 965 966 dprintk("<-- %s status=%d\n", __func__, ret); 967 return ret; 968 } 969 970 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata) 971 { 972 struct nfs4_call_sync_data *data = calldata; 973 struct nfs4_session *session = nfs4_get_session(data->seq_server); 974 975 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server); 976 977 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task); 978 } 979 980 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata) 981 { 982 struct nfs4_call_sync_data *data = calldata; 983 984 nfs41_sequence_done(task, data->seq_res); 985 } 986 987 static const struct rpc_call_ops nfs41_call_sync_ops = { 988 .rpc_call_prepare = nfs41_call_sync_prepare, 989 .rpc_call_done = nfs41_call_sync_done, 990 }; 991 992 #else /* !CONFIG_NFS_V4_1 */ 993 994 static int nfs4_setup_sequence(const struct nfs_server *server, 995 struct nfs4_sequence_args *args, 996 struct nfs4_sequence_res *res, 997 struct rpc_task *task) 998 { 999 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl, 1000 args, res, task); 1001 } 1002 1003 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res) 1004 { 1005 return nfs40_sequence_done(task, res); 1006 } 1007 1008 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res) 1009 { 1010 if (res->sr_slot != NULL) 1011 nfs40_sequence_free_slot(res); 1012 } 1013 1014 int nfs4_sequence_done(struct rpc_task *task, 1015 struct nfs4_sequence_res *res) 1016 { 1017 return nfs40_sequence_done(task, res); 1018 } 1019 EXPORT_SYMBOL_GPL(nfs4_sequence_done); 1020 1021 #endif /* !CONFIG_NFS_V4_1 */ 1022 1023 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata) 1024 { 1025 struct nfs4_call_sync_data *data = calldata; 1026 nfs4_setup_sequence(data->seq_server, 1027 data->seq_args, data->seq_res, task); 1028 } 1029 1030 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata) 1031 { 1032 struct nfs4_call_sync_data *data = calldata; 1033 nfs4_sequence_done(task, data->seq_res); 1034 } 1035 1036 static const struct rpc_call_ops nfs40_call_sync_ops = { 1037 .rpc_call_prepare = nfs40_call_sync_prepare, 1038 .rpc_call_done = nfs40_call_sync_done, 1039 }; 1040 1041 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt, 1042 struct nfs_server *server, 1043 struct rpc_message *msg, 1044 struct nfs4_sequence_args *args, 1045 struct nfs4_sequence_res *res) 1046 { 1047 int ret; 1048 struct rpc_task *task; 1049 struct nfs_client *clp = server->nfs_client; 1050 struct nfs4_call_sync_data data = { 1051 .seq_server = server, 1052 .seq_args = args, 1053 .seq_res = res, 1054 }; 1055 struct rpc_task_setup task_setup = { 1056 .rpc_client = clnt, 1057 .rpc_message = msg, 1058 .callback_ops = clp->cl_mvops->call_sync_ops, 1059 .callback_data = &data 1060 }; 1061 1062 task = rpc_run_task(&task_setup); 1063 if (IS_ERR(task)) 1064 ret = PTR_ERR(task); 1065 else { 1066 ret = task->tk_status; 1067 rpc_put_task(task); 1068 } 1069 return ret; 1070 } 1071 1072 int nfs4_call_sync(struct rpc_clnt *clnt, 1073 struct nfs_server *server, 1074 struct rpc_message *msg, 1075 struct nfs4_sequence_args *args, 1076 struct nfs4_sequence_res *res, 1077 int cache_reply) 1078 { 1079 nfs4_init_sequence(args, res, cache_reply); 1080 return nfs4_call_sync_sequence(clnt, server, msg, args, res); 1081 } 1082 1083 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo) 1084 { 1085 struct nfs_inode *nfsi = NFS_I(dir); 1086 1087 spin_lock(&dir->i_lock); 1088 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; 1089 if (!cinfo->atomic || cinfo->before != dir->i_version) 1090 nfs_force_lookup_revalidate(dir); 1091 dir->i_version = cinfo->after; 1092 nfsi->attr_gencount = nfs_inc_attr_generation_counter(); 1093 nfs_fscache_invalidate(dir); 1094 spin_unlock(&dir->i_lock); 1095 } 1096 1097 struct nfs4_opendata { 1098 struct kref kref; 1099 struct nfs_openargs o_arg; 1100 struct nfs_openres o_res; 1101 struct nfs_open_confirmargs c_arg; 1102 struct nfs_open_confirmres c_res; 1103 struct nfs4_string owner_name; 1104 struct nfs4_string group_name; 1105 struct nfs4_label *a_label; 1106 struct nfs_fattr f_attr; 1107 struct nfs4_label *f_label; 1108 struct dentry *dir; 1109 struct dentry *dentry; 1110 struct nfs4_state_owner *owner; 1111 struct nfs4_state *state; 1112 struct iattr attrs; 1113 unsigned long timestamp; 1114 unsigned int rpc_done : 1; 1115 unsigned int file_created : 1; 1116 unsigned int is_recover : 1; 1117 int rpc_status; 1118 int cancelled; 1119 }; 1120 1121 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server, 1122 int err, struct nfs4_exception *exception) 1123 { 1124 if (err != -EINVAL) 1125 return false; 1126 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1127 return false; 1128 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1; 1129 exception->retry = 1; 1130 return true; 1131 } 1132 1133 static u32 1134 nfs4_map_atomic_open_share(struct nfs_server *server, 1135 fmode_t fmode, int openflags) 1136 { 1137 u32 res = 0; 1138 1139 switch (fmode & (FMODE_READ | FMODE_WRITE)) { 1140 case FMODE_READ: 1141 res = NFS4_SHARE_ACCESS_READ; 1142 break; 1143 case FMODE_WRITE: 1144 res = NFS4_SHARE_ACCESS_WRITE; 1145 break; 1146 case FMODE_READ|FMODE_WRITE: 1147 res = NFS4_SHARE_ACCESS_BOTH; 1148 } 1149 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1)) 1150 goto out; 1151 /* Want no delegation if we're using O_DIRECT */ 1152 if (openflags & O_DIRECT) 1153 res |= NFS4_SHARE_WANT_NO_DELEG; 1154 out: 1155 return res; 1156 } 1157 1158 static enum open_claim_type4 1159 nfs4_map_atomic_open_claim(struct nfs_server *server, 1160 enum open_claim_type4 claim) 1161 { 1162 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1) 1163 return claim; 1164 switch (claim) { 1165 default: 1166 return claim; 1167 case NFS4_OPEN_CLAIM_FH: 1168 return NFS4_OPEN_CLAIM_NULL; 1169 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1170 return NFS4_OPEN_CLAIM_DELEGATE_CUR; 1171 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1172 return NFS4_OPEN_CLAIM_DELEGATE_PREV; 1173 } 1174 } 1175 1176 static void nfs4_init_opendata_res(struct nfs4_opendata *p) 1177 { 1178 p->o_res.f_attr = &p->f_attr; 1179 p->o_res.f_label = p->f_label; 1180 p->o_res.seqid = p->o_arg.seqid; 1181 p->c_res.seqid = p->c_arg.seqid; 1182 p->o_res.server = p->o_arg.server; 1183 p->o_res.access_request = p->o_arg.access; 1184 nfs_fattr_init(&p->f_attr); 1185 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name); 1186 } 1187 1188 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, 1189 struct nfs4_state_owner *sp, fmode_t fmode, int flags, 1190 const struct iattr *attrs, 1191 struct nfs4_label *label, 1192 enum open_claim_type4 claim, 1193 gfp_t gfp_mask) 1194 { 1195 struct dentry *parent = dget_parent(dentry); 1196 struct inode *dir = d_inode(parent); 1197 struct nfs_server *server = NFS_SERVER(dir); 1198 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 1199 struct nfs4_opendata *p; 1200 1201 p = kzalloc(sizeof(*p), gfp_mask); 1202 if (p == NULL) 1203 goto err; 1204 1205 p->f_label = nfs4_label_alloc(server, gfp_mask); 1206 if (IS_ERR(p->f_label)) 1207 goto err_free_p; 1208 1209 p->a_label = nfs4_label_alloc(server, gfp_mask); 1210 if (IS_ERR(p->a_label)) 1211 goto err_free_f; 1212 1213 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 1214 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask); 1215 if (IS_ERR(p->o_arg.seqid)) 1216 goto err_free_label; 1217 nfs_sb_active(dentry->d_sb); 1218 p->dentry = dget(dentry); 1219 p->dir = parent; 1220 p->owner = sp; 1221 atomic_inc(&sp->so_count); 1222 p->o_arg.open_flags = flags; 1223 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE); 1224 p->o_arg.share_access = nfs4_map_atomic_open_share(server, 1225 fmode, flags); 1226 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS 1227 * will return permission denied for all bits until close */ 1228 if (!(flags & O_EXCL)) { 1229 /* ask server to check for all possible rights as results 1230 * are cached */ 1231 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY | 1232 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE; 1233 } 1234 p->o_arg.clientid = server->nfs_client->cl_clientid; 1235 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time); 1236 p->o_arg.id.uniquifier = sp->so_seqid.owner_id; 1237 p->o_arg.name = &dentry->d_name; 1238 p->o_arg.server = server; 1239 p->o_arg.bitmask = nfs4_bitmask(server, label); 1240 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; 1241 p->o_arg.label = nfs4_label_copy(p->a_label, label); 1242 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); 1243 switch (p->o_arg.claim) { 1244 case NFS4_OPEN_CLAIM_NULL: 1245 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1246 case NFS4_OPEN_CLAIM_DELEGATE_PREV: 1247 p->o_arg.fh = NFS_FH(dir); 1248 break; 1249 case NFS4_OPEN_CLAIM_PREVIOUS: 1250 case NFS4_OPEN_CLAIM_FH: 1251 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1252 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 1253 p->o_arg.fh = NFS_FH(d_inode(dentry)); 1254 } 1255 if (attrs != NULL && attrs->ia_valid != 0) { 1256 __u32 verf[2]; 1257 1258 p->o_arg.u.attrs = &p->attrs; 1259 memcpy(&p->attrs, attrs, sizeof(p->attrs)); 1260 1261 verf[0] = jiffies; 1262 verf[1] = current->pid; 1263 memcpy(p->o_arg.u.verifier.data, verf, 1264 sizeof(p->o_arg.u.verifier.data)); 1265 } 1266 p->c_arg.fh = &p->o_res.fh; 1267 p->c_arg.stateid = &p->o_res.stateid; 1268 p->c_arg.seqid = p->o_arg.seqid; 1269 nfs4_init_opendata_res(p); 1270 kref_init(&p->kref); 1271 return p; 1272 1273 err_free_label: 1274 nfs4_label_free(p->a_label); 1275 err_free_f: 1276 nfs4_label_free(p->f_label); 1277 err_free_p: 1278 kfree(p); 1279 err: 1280 dput(parent); 1281 return NULL; 1282 } 1283 1284 static void nfs4_opendata_free(struct kref *kref) 1285 { 1286 struct nfs4_opendata *p = container_of(kref, 1287 struct nfs4_opendata, kref); 1288 struct super_block *sb = p->dentry->d_sb; 1289 1290 nfs_free_seqid(p->o_arg.seqid); 1291 nfs4_sequence_free_slot(&p->o_res.seq_res); 1292 if (p->state != NULL) 1293 nfs4_put_open_state(p->state); 1294 nfs4_put_state_owner(p->owner); 1295 1296 nfs4_label_free(p->a_label); 1297 nfs4_label_free(p->f_label); 1298 1299 dput(p->dir); 1300 dput(p->dentry); 1301 nfs_sb_deactive(sb); 1302 nfs_fattr_free_names(&p->f_attr); 1303 kfree(p->f_attr.mdsthreshold); 1304 kfree(p); 1305 } 1306 1307 static void nfs4_opendata_put(struct nfs4_opendata *p) 1308 { 1309 if (p != NULL) 1310 kref_put(&p->kref, nfs4_opendata_free); 1311 } 1312 1313 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task) 1314 { 1315 int ret; 1316 1317 ret = rpc_wait_for_completion_task(task); 1318 return ret; 1319 } 1320 1321 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state, 1322 fmode_t fmode) 1323 { 1324 switch(fmode & (FMODE_READ|FMODE_WRITE)) { 1325 case FMODE_READ|FMODE_WRITE: 1326 return state->n_rdwr != 0; 1327 case FMODE_WRITE: 1328 return state->n_wronly != 0; 1329 case FMODE_READ: 1330 return state->n_rdonly != 0; 1331 } 1332 WARN_ON_ONCE(1); 1333 return false; 1334 } 1335 1336 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode) 1337 { 1338 int ret = 0; 1339 1340 if (open_mode & (O_EXCL|O_TRUNC)) 1341 goto out; 1342 switch (mode & (FMODE_READ|FMODE_WRITE)) { 1343 case FMODE_READ: 1344 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 1345 && state->n_rdonly != 0; 1346 break; 1347 case FMODE_WRITE: 1348 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 1349 && state->n_wronly != 0; 1350 break; 1351 case FMODE_READ|FMODE_WRITE: 1352 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 1353 && state->n_rdwr != 0; 1354 } 1355 out: 1356 return ret; 1357 } 1358 1359 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode, 1360 enum open_claim_type4 claim) 1361 { 1362 if (delegation == NULL) 1363 return 0; 1364 if ((delegation->type & fmode) != fmode) 1365 return 0; 1366 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags)) 1367 return 0; 1368 switch (claim) { 1369 case NFS4_OPEN_CLAIM_NULL: 1370 case NFS4_OPEN_CLAIM_FH: 1371 break; 1372 case NFS4_OPEN_CLAIM_PREVIOUS: 1373 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags)) 1374 break; 1375 default: 1376 return 0; 1377 } 1378 nfs_mark_delegation_referenced(delegation); 1379 return 1; 1380 } 1381 1382 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode) 1383 { 1384 switch (fmode) { 1385 case FMODE_WRITE: 1386 state->n_wronly++; 1387 break; 1388 case FMODE_READ: 1389 state->n_rdonly++; 1390 break; 1391 case FMODE_READ|FMODE_WRITE: 1392 state->n_rdwr++; 1393 } 1394 nfs4_state_set_mode_locked(state, state->state | fmode); 1395 } 1396 1397 #ifdef CONFIG_NFS_V4_1 1398 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state) 1399 { 1400 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags)) 1401 return true; 1402 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags)) 1403 return true; 1404 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags)) 1405 return true; 1406 return false; 1407 } 1408 #endif /* CONFIG_NFS_V4_1 */ 1409 1410 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state) 1411 { 1412 struct nfs_client *clp = state->owner->so_server->nfs_client; 1413 bool need_recover = false; 1414 1415 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly) 1416 need_recover = true; 1417 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly) 1418 need_recover = true; 1419 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr) 1420 need_recover = true; 1421 if (need_recover) 1422 nfs4_state_mark_reclaim_nograce(clp, state); 1423 } 1424 1425 static bool nfs_need_update_open_stateid(struct nfs4_state *state, 1426 const nfs4_stateid *stateid, nfs4_stateid *freeme) 1427 { 1428 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0) 1429 return true; 1430 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) { 1431 nfs4_stateid_copy(freeme, &state->open_stateid); 1432 nfs_test_and_clear_all_open_stateid(state); 1433 return true; 1434 } 1435 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) 1436 return true; 1437 return false; 1438 } 1439 1440 static void nfs_resync_open_stateid_locked(struct nfs4_state *state) 1441 { 1442 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr)) 1443 return; 1444 if (state->n_wronly) 1445 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1446 if (state->n_rdonly) 1447 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1448 if (state->n_rdwr) 1449 set_bit(NFS_O_RDWR_STATE, &state->flags); 1450 set_bit(NFS_OPEN_STATE, &state->flags); 1451 } 1452 1453 static void nfs_clear_open_stateid_locked(struct nfs4_state *state, 1454 nfs4_stateid *stateid, fmode_t fmode) 1455 { 1456 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1457 switch (fmode & (FMODE_READ|FMODE_WRITE)) { 1458 case FMODE_WRITE: 1459 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1460 break; 1461 case FMODE_READ: 1462 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1463 break; 1464 case 0: 1465 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1466 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1467 clear_bit(NFS_OPEN_STATE, &state->flags); 1468 } 1469 if (stateid == NULL) 1470 return; 1471 /* Handle OPEN+OPEN_DOWNGRADE races */ 1472 if (nfs4_stateid_match_other(stateid, &state->open_stateid) && 1473 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) { 1474 nfs_resync_open_stateid_locked(state); 1475 return; 1476 } 1477 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1478 nfs4_stateid_copy(&state->stateid, stateid); 1479 nfs4_stateid_copy(&state->open_stateid, stateid); 1480 } 1481 1482 static void nfs_clear_open_stateid(struct nfs4_state *state, 1483 nfs4_stateid *arg_stateid, 1484 nfs4_stateid *stateid, fmode_t fmode) 1485 { 1486 write_seqlock(&state->seqlock); 1487 /* Ignore, if the CLOSE argment doesn't match the current stateid */ 1488 if (nfs4_state_match_open_stateid_other(state, arg_stateid)) 1489 nfs_clear_open_stateid_locked(state, stateid, fmode); 1490 write_sequnlock(&state->seqlock); 1491 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1492 nfs4_schedule_state_manager(state->owner->so_server->nfs_client); 1493 } 1494 1495 static void nfs_set_open_stateid_locked(struct nfs4_state *state, 1496 const nfs4_stateid *stateid, fmode_t fmode, 1497 nfs4_stateid *freeme) 1498 { 1499 switch (fmode) { 1500 case FMODE_READ: 1501 set_bit(NFS_O_RDONLY_STATE, &state->flags); 1502 break; 1503 case FMODE_WRITE: 1504 set_bit(NFS_O_WRONLY_STATE, &state->flags); 1505 break; 1506 case FMODE_READ|FMODE_WRITE: 1507 set_bit(NFS_O_RDWR_STATE, &state->flags); 1508 } 1509 if (!nfs_need_update_open_stateid(state, stateid, freeme)) 1510 return; 1511 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1512 nfs4_stateid_copy(&state->stateid, stateid); 1513 nfs4_stateid_copy(&state->open_stateid, stateid); 1514 } 1515 1516 static void __update_open_stateid(struct nfs4_state *state, 1517 const nfs4_stateid *open_stateid, 1518 const nfs4_stateid *deleg_stateid, 1519 fmode_t fmode, 1520 nfs4_stateid *freeme) 1521 { 1522 /* 1523 * Protect the call to nfs4_state_set_mode_locked and 1524 * serialise the stateid update 1525 */ 1526 spin_lock(&state->owner->so_lock); 1527 write_seqlock(&state->seqlock); 1528 if (deleg_stateid != NULL) { 1529 nfs4_stateid_copy(&state->stateid, deleg_stateid); 1530 set_bit(NFS_DELEGATED_STATE, &state->flags); 1531 } 1532 if (open_stateid != NULL) 1533 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme); 1534 write_sequnlock(&state->seqlock); 1535 update_open_stateflags(state, fmode); 1536 spin_unlock(&state->owner->so_lock); 1537 } 1538 1539 static int update_open_stateid(struct nfs4_state *state, 1540 const nfs4_stateid *open_stateid, 1541 const nfs4_stateid *delegation, 1542 fmode_t fmode) 1543 { 1544 struct nfs_server *server = NFS_SERVER(state->inode); 1545 struct nfs_client *clp = server->nfs_client; 1546 struct nfs_inode *nfsi = NFS_I(state->inode); 1547 struct nfs_delegation *deleg_cur; 1548 nfs4_stateid freeme = { }; 1549 int ret = 0; 1550 1551 fmode &= (FMODE_READ|FMODE_WRITE); 1552 1553 rcu_read_lock(); 1554 deleg_cur = rcu_dereference(nfsi->delegation); 1555 if (deleg_cur == NULL) 1556 goto no_delegation; 1557 1558 spin_lock(&deleg_cur->lock); 1559 if (rcu_dereference(nfsi->delegation) != deleg_cur || 1560 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) || 1561 (deleg_cur->type & fmode) != fmode) 1562 goto no_delegation_unlock; 1563 1564 if (delegation == NULL) 1565 delegation = &deleg_cur->stateid; 1566 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation)) 1567 goto no_delegation_unlock; 1568 1569 nfs_mark_delegation_referenced(deleg_cur); 1570 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, 1571 fmode, &freeme); 1572 ret = 1; 1573 no_delegation_unlock: 1574 spin_unlock(&deleg_cur->lock); 1575 no_delegation: 1576 rcu_read_unlock(); 1577 1578 if (!ret && open_stateid != NULL) { 1579 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme); 1580 ret = 1; 1581 } 1582 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags)) 1583 nfs4_schedule_state_manager(clp); 1584 if (freeme.type != 0) 1585 nfs4_test_and_free_stateid(server, &freeme, 1586 state->owner->so_cred); 1587 1588 return ret; 1589 } 1590 1591 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp, 1592 const nfs4_stateid *stateid) 1593 { 1594 struct nfs4_state *state = lsp->ls_state; 1595 bool ret = false; 1596 1597 spin_lock(&state->state_lock); 1598 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid)) 1599 goto out_noupdate; 1600 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid)) 1601 goto out_noupdate; 1602 nfs4_stateid_copy(&lsp->ls_stateid, stateid); 1603 ret = true; 1604 out_noupdate: 1605 spin_unlock(&state->state_lock); 1606 return ret; 1607 } 1608 1609 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode) 1610 { 1611 struct nfs_delegation *delegation; 1612 1613 rcu_read_lock(); 1614 delegation = rcu_dereference(NFS_I(inode)->delegation); 1615 if (delegation == NULL || (delegation->type & fmode) == fmode) { 1616 rcu_read_unlock(); 1617 return; 1618 } 1619 rcu_read_unlock(); 1620 nfs4_inode_return_delegation(inode); 1621 } 1622 1623 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata) 1624 { 1625 struct nfs4_state *state = opendata->state; 1626 struct nfs_inode *nfsi = NFS_I(state->inode); 1627 struct nfs_delegation *delegation; 1628 int open_mode = opendata->o_arg.open_flags; 1629 fmode_t fmode = opendata->o_arg.fmode; 1630 enum open_claim_type4 claim = opendata->o_arg.claim; 1631 nfs4_stateid stateid; 1632 int ret = -EAGAIN; 1633 1634 for (;;) { 1635 spin_lock(&state->owner->so_lock); 1636 if (can_open_cached(state, fmode, open_mode)) { 1637 update_open_stateflags(state, fmode); 1638 spin_unlock(&state->owner->so_lock); 1639 goto out_return_state; 1640 } 1641 spin_unlock(&state->owner->so_lock); 1642 rcu_read_lock(); 1643 delegation = rcu_dereference(nfsi->delegation); 1644 if (!can_open_delegated(delegation, fmode, claim)) { 1645 rcu_read_unlock(); 1646 break; 1647 } 1648 /* Save the delegation */ 1649 nfs4_stateid_copy(&stateid, &delegation->stateid); 1650 rcu_read_unlock(); 1651 nfs_release_seqid(opendata->o_arg.seqid); 1652 if (!opendata->is_recover) { 1653 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode); 1654 if (ret != 0) 1655 goto out; 1656 } 1657 ret = -EAGAIN; 1658 1659 /* Try to update the stateid using the delegation */ 1660 if (update_open_stateid(state, NULL, &stateid, fmode)) 1661 goto out_return_state; 1662 } 1663 out: 1664 return ERR_PTR(ret); 1665 out_return_state: 1666 atomic_inc(&state->count); 1667 return state; 1668 } 1669 1670 static void 1671 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state) 1672 { 1673 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client; 1674 struct nfs_delegation *delegation; 1675 int delegation_flags = 0; 1676 1677 rcu_read_lock(); 1678 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1679 if (delegation) 1680 delegation_flags = delegation->flags; 1681 rcu_read_unlock(); 1682 switch (data->o_arg.claim) { 1683 default: 1684 break; 1685 case NFS4_OPEN_CLAIM_DELEGATE_CUR: 1686 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 1687 pr_err_ratelimited("NFS: Broken NFSv4 server %s is " 1688 "returning a delegation for " 1689 "OPEN(CLAIM_DELEGATE_CUR)\n", 1690 clp->cl_hostname); 1691 return; 1692 } 1693 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0) 1694 nfs_inode_set_delegation(state->inode, 1695 data->owner->so_cred, 1696 &data->o_res); 1697 else 1698 nfs_inode_reclaim_delegation(state->inode, 1699 data->owner->so_cred, 1700 &data->o_res); 1701 } 1702 1703 /* 1704 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes 1705 * and update the nfs4_state. 1706 */ 1707 static struct nfs4_state * 1708 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) 1709 { 1710 struct inode *inode = data->state->inode; 1711 struct nfs4_state *state = data->state; 1712 int ret; 1713 1714 if (!data->rpc_done) { 1715 if (data->rpc_status) { 1716 ret = data->rpc_status; 1717 goto err; 1718 } 1719 /* cached opens have already been processed */ 1720 goto update; 1721 } 1722 1723 ret = nfs_refresh_inode(inode, &data->f_attr); 1724 if (ret) 1725 goto err; 1726 1727 if (data->o_res.delegation_type != 0) 1728 nfs4_opendata_check_deleg(data, state); 1729 update: 1730 update_open_stateid(state, &data->o_res.stateid, NULL, 1731 data->o_arg.fmode); 1732 atomic_inc(&state->count); 1733 1734 return state; 1735 err: 1736 return ERR_PTR(ret); 1737 1738 } 1739 1740 static struct nfs4_state * 1741 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1742 { 1743 struct inode *inode; 1744 struct nfs4_state *state = NULL; 1745 int ret; 1746 1747 if (!data->rpc_done) { 1748 state = nfs4_try_open_cached(data); 1749 trace_nfs4_cached_open(data->state); 1750 goto out; 1751 } 1752 1753 ret = -EAGAIN; 1754 if (!(data->f_attr.valid & NFS_ATTR_FATTR)) 1755 goto err; 1756 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label); 1757 ret = PTR_ERR(inode); 1758 if (IS_ERR(inode)) 1759 goto err; 1760 ret = -ENOMEM; 1761 state = nfs4_get_open_state(inode, data->owner); 1762 if (state == NULL) 1763 goto err_put_inode; 1764 if (data->o_res.delegation_type != 0) 1765 nfs4_opendata_check_deleg(data, state); 1766 update_open_stateid(state, &data->o_res.stateid, NULL, 1767 data->o_arg.fmode); 1768 iput(inode); 1769 out: 1770 nfs_release_seqid(data->o_arg.seqid); 1771 return state; 1772 err_put_inode: 1773 iput(inode); 1774 err: 1775 return ERR_PTR(ret); 1776 } 1777 1778 static struct nfs4_state * 1779 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data) 1780 { 1781 struct nfs4_state *ret; 1782 1783 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) 1784 ret =_nfs4_opendata_reclaim_to_nfs4_state(data); 1785 else 1786 ret = _nfs4_opendata_to_nfs4_state(data); 1787 nfs4_sequence_free_slot(&data->o_res.seq_res); 1788 return ret; 1789 } 1790 1791 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state) 1792 { 1793 struct nfs_inode *nfsi = NFS_I(state->inode); 1794 struct nfs_open_context *ctx; 1795 1796 spin_lock(&state->inode->i_lock); 1797 list_for_each_entry(ctx, &nfsi->open_files, list) { 1798 if (ctx->state != state) 1799 continue; 1800 get_nfs_open_context(ctx); 1801 spin_unlock(&state->inode->i_lock); 1802 return ctx; 1803 } 1804 spin_unlock(&state->inode->i_lock); 1805 return ERR_PTR(-ENOENT); 1806 } 1807 1808 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, 1809 struct nfs4_state *state, enum open_claim_type4 claim) 1810 { 1811 struct nfs4_opendata *opendata; 1812 1813 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, 1814 NULL, NULL, claim, GFP_NOFS); 1815 if (opendata == NULL) 1816 return ERR_PTR(-ENOMEM); 1817 opendata->state = state; 1818 atomic_inc(&state->count); 1819 return opendata; 1820 } 1821 1822 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, 1823 fmode_t fmode) 1824 { 1825 struct nfs4_state *newstate; 1826 int ret; 1827 1828 if (!nfs4_mode_match_open_stateid(opendata->state, fmode)) 1829 return 0; 1830 opendata->o_arg.open_flags = 0; 1831 opendata->o_arg.fmode = fmode; 1832 opendata->o_arg.share_access = nfs4_map_atomic_open_share( 1833 NFS_SB(opendata->dentry->d_sb), 1834 fmode, 0); 1835 memset(&opendata->o_res, 0, sizeof(opendata->o_res)); 1836 memset(&opendata->c_res, 0, sizeof(opendata->c_res)); 1837 nfs4_init_opendata_res(opendata); 1838 ret = _nfs4_recover_proc_open(opendata); 1839 if (ret != 0) 1840 return ret; 1841 newstate = nfs4_opendata_to_nfs4_state(opendata); 1842 if (IS_ERR(newstate)) 1843 return PTR_ERR(newstate); 1844 if (newstate != opendata->state) 1845 ret = -ESTALE; 1846 nfs4_close_state(newstate, fmode); 1847 return ret; 1848 } 1849 1850 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state) 1851 { 1852 int ret; 1853 1854 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */ 1855 clear_bit(NFS_O_RDWR_STATE, &state->flags); 1856 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 1857 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 1858 /* memory barrier prior to reading state->n_* */ 1859 clear_bit(NFS_DELEGATED_STATE, &state->flags); 1860 clear_bit(NFS_OPEN_STATE, &state->flags); 1861 smp_rmb(); 1862 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 1863 if (ret != 0) 1864 return ret; 1865 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE); 1866 if (ret != 0) 1867 return ret; 1868 ret = nfs4_open_recover_helper(opendata, FMODE_READ); 1869 if (ret != 0) 1870 return ret; 1871 /* 1872 * We may have performed cached opens for all three recoveries. 1873 * Check if we need to update the current stateid. 1874 */ 1875 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 && 1876 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) { 1877 write_seqlock(&state->seqlock); 1878 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) 1879 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 1880 write_sequnlock(&state->seqlock); 1881 } 1882 return 0; 1883 } 1884 1885 /* 1886 * OPEN_RECLAIM: 1887 * reclaim state on the server after a reboot. 1888 */ 1889 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 1890 { 1891 struct nfs_delegation *delegation; 1892 struct nfs4_opendata *opendata; 1893 fmode_t delegation_type = 0; 1894 int status; 1895 1896 opendata = nfs4_open_recoverdata_alloc(ctx, state, 1897 NFS4_OPEN_CLAIM_PREVIOUS); 1898 if (IS_ERR(opendata)) 1899 return PTR_ERR(opendata); 1900 rcu_read_lock(); 1901 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 1902 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0) 1903 delegation_type = delegation->type; 1904 rcu_read_unlock(); 1905 opendata->o_arg.u.delegation_type = delegation_type; 1906 status = nfs4_open_recover(opendata, state); 1907 nfs4_opendata_put(opendata); 1908 return status; 1909 } 1910 1911 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state) 1912 { 1913 struct nfs_server *server = NFS_SERVER(state->inode); 1914 struct nfs4_exception exception = { }; 1915 int err; 1916 do { 1917 err = _nfs4_do_open_reclaim(ctx, state); 1918 trace_nfs4_open_reclaim(ctx, 0, err); 1919 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 1920 continue; 1921 if (err != -NFS4ERR_DELAY) 1922 break; 1923 nfs4_handle_exception(server, err, &exception); 1924 } while (exception.retry); 1925 return err; 1926 } 1927 1928 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state) 1929 { 1930 struct nfs_open_context *ctx; 1931 int ret; 1932 1933 ctx = nfs4_state_find_open_context(state); 1934 if (IS_ERR(ctx)) 1935 return -EAGAIN; 1936 ret = nfs4_do_open_reclaim(ctx, state); 1937 put_nfs_open_context(ctx); 1938 return ret; 1939 } 1940 1941 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err) 1942 { 1943 switch (err) { 1944 default: 1945 printk(KERN_ERR "NFS: %s: unhandled error " 1946 "%d.\n", __func__, err); 1947 case 0: 1948 case -ENOENT: 1949 case -EAGAIN: 1950 case -ESTALE: 1951 break; 1952 case -NFS4ERR_BADSESSION: 1953 case -NFS4ERR_BADSLOT: 1954 case -NFS4ERR_BAD_HIGH_SLOT: 1955 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 1956 case -NFS4ERR_DEADSESSION: 1957 set_bit(NFS_DELEGATED_STATE, &state->flags); 1958 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err); 1959 return -EAGAIN; 1960 case -NFS4ERR_STALE_CLIENTID: 1961 case -NFS4ERR_STALE_STATEID: 1962 set_bit(NFS_DELEGATED_STATE, &state->flags); 1963 /* Don't recall a delegation if it was lost */ 1964 nfs4_schedule_lease_recovery(server->nfs_client); 1965 return -EAGAIN; 1966 case -NFS4ERR_MOVED: 1967 nfs4_schedule_migration_recovery(server); 1968 return -EAGAIN; 1969 case -NFS4ERR_LEASE_MOVED: 1970 nfs4_schedule_lease_moved_recovery(server->nfs_client); 1971 return -EAGAIN; 1972 case -NFS4ERR_DELEG_REVOKED: 1973 case -NFS4ERR_ADMIN_REVOKED: 1974 case -NFS4ERR_EXPIRED: 1975 case -NFS4ERR_BAD_STATEID: 1976 case -NFS4ERR_OPENMODE: 1977 nfs_inode_find_state_and_recover(state->inode, 1978 stateid); 1979 nfs4_schedule_stateid_recovery(server, state); 1980 return -EAGAIN; 1981 case -NFS4ERR_DELAY: 1982 case -NFS4ERR_GRACE: 1983 set_bit(NFS_DELEGATED_STATE, &state->flags); 1984 ssleep(1); 1985 return -EAGAIN; 1986 case -ENOMEM: 1987 case -NFS4ERR_DENIED: 1988 /* kill_proc(fl->fl_pid, SIGLOST, 1); */ 1989 return 0; 1990 } 1991 return err; 1992 } 1993 1994 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, 1995 struct nfs4_state *state, const nfs4_stateid *stateid, 1996 fmode_t type) 1997 { 1998 struct nfs_server *server = NFS_SERVER(state->inode); 1999 struct nfs4_opendata *opendata; 2000 int err = 0; 2001 2002 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2003 NFS4_OPEN_CLAIM_DELEG_CUR_FH); 2004 if (IS_ERR(opendata)) 2005 return PTR_ERR(opendata); 2006 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid); 2007 write_seqlock(&state->seqlock); 2008 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2009 write_sequnlock(&state->seqlock); 2010 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2011 switch (type & (FMODE_READ|FMODE_WRITE)) { 2012 case FMODE_READ|FMODE_WRITE: 2013 case FMODE_WRITE: 2014 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE); 2015 if (err) 2016 break; 2017 err = nfs4_open_recover_helper(opendata, FMODE_WRITE); 2018 if (err) 2019 break; 2020 case FMODE_READ: 2021 err = nfs4_open_recover_helper(opendata, FMODE_READ); 2022 } 2023 nfs4_opendata_put(opendata); 2024 return nfs4_handle_delegation_recall_error(server, state, stateid, err); 2025 } 2026 2027 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata) 2028 { 2029 struct nfs4_opendata *data = calldata; 2030 2031 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl, 2032 &data->c_arg.seq_args, &data->c_res.seq_res, task); 2033 } 2034 2035 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata) 2036 { 2037 struct nfs4_opendata *data = calldata; 2038 2039 nfs40_sequence_done(task, &data->c_res.seq_res); 2040 2041 data->rpc_status = task->tk_status; 2042 if (data->rpc_status == 0) { 2043 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid); 2044 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2045 renew_lease(data->o_res.server, data->timestamp); 2046 data->rpc_done = 1; 2047 } 2048 } 2049 2050 static void nfs4_open_confirm_release(void *calldata) 2051 { 2052 struct nfs4_opendata *data = calldata; 2053 struct nfs4_state *state = NULL; 2054 2055 /* If this request hasn't been cancelled, do nothing */ 2056 if (data->cancelled == 0) 2057 goto out_free; 2058 /* In case of error, no cleanup! */ 2059 if (!data->rpc_done) 2060 goto out_free; 2061 state = nfs4_opendata_to_nfs4_state(data); 2062 if (!IS_ERR(state)) 2063 nfs4_close_state(state, data->o_arg.fmode); 2064 out_free: 2065 nfs4_opendata_put(data); 2066 } 2067 2068 static const struct rpc_call_ops nfs4_open_confirm_ops = { 2069 .rpc_call_prepare = nfs4_open_confirm_prepare, 2070 .rpc_call_done = nfs4_open_confirm_done, 2071 .rpc_release = nfs4_open_confirm_release, 2072 }; 2073 2074 /* 2075 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata 2076 */ 2077 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data) 2078 { 2079 struct nfs_server *server = NFS_SERVER(d_inode(data->dir)); 2080 struct rpc_task *task; 2081 struct rpc_message msg = { 2082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM], 2083 .rpc_argp = &data->c_arg, 2084 .rpc_resp = &data->c_res, 2085 .rpc_cred = data->owner->so_cred, 2086 }; 2087 struct rpc_task_setup task_setup_data = { 2088 .rpc_client = server->client, 2089 .rpc_message = &msg, 2090 .callback_ops = &nfs4_open_confirm_ops, 2091 .callback_data = data, 2092 .workqueue = nfsiod_workqueue, 2093 .flags = RPC_TASK_ASYNC, 2094 }; 2095 int status; 2096 2097 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1); 2098 kref_get(&data->kref); 2099 data->rpc_done = 0; 2100 data->rpc_status = 0; 2101 data->timestamp = jiffies; 2102 if (data->is_recover) 2103 nfs4_set_sequence_privileged(&data->c_arg.seq_args); 2104 task = rpc_run_task(&task_setup_data); 2105 if (IS_ERR(task)) 2106 return PTR_ERR(task); 2107 status = nfs4_wait_for_completion_rpc_task(task); 2108 if (status != 0) { 2109 data->cancelled = 1; 2110 smp_wmb(); 2111 } else 2112 status = data->rpc_status; 2113 rpc_put_task(task); 2114 return status; 2115 } 2116 2117 static void nfs4_open_prepare(struct rpc_task *task, void *calldata) 2118 { 2119 struct nfs4_opendata *data = calldata; 2120 struct nfs4_state_owner *sp = data->owner; 2121 struct nfs_client *clp = sp->so_server->nfs_client; 2122 enum open_claim_type4 claim = data->o_arg.claim; 2123 2124 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0) 2125 goto out_wait; 2126 /* 2127 * Check if we still need to send an OPEN call, or if we can use 2128 * a delegation instead. 2129 */ 2130 if (data->state != NULL) { 2131 struct nfs_delegation *delegation; 2132 2133 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags)) 2134 goto out_no_action; 2135 rcu_read_lock(); 2136 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation); 2137 if (can_open_delegated(delegation, data->o_arg.fmode, claim)) 2138 goto unlock_no_action; 2139 rcu_read_unlock(); 2140 } 2141 /* Update client id. */ 2142 data->o_arg.clientid = clp->cl_clientid; 2143 switch (claim) { 2144 default: 2145 break; 2146 case NFS4_OPEN_CLAIM_PREVIOUS: 2147 case NFS4_OPEN_CLAIM_DELEG_CUR_FH: 2148 case NFS4_OPEN_CLAIM_DELEG_PREV_FH: 2149 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0]; 2150 case NFS4_OPEN_CLAIM_FH: 2151 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR]; 2152 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh); 2153 } 2154 data->timestamp = jiffies; 2155 if (nfs4_setup_sequence(data->o_arg.server, 2156 &data->o_arg.seq_args, 2157 &data->o_res.seq_res, 2158 task) != 0) 2159 nfs_release_seqid(data->o_arg.seqid); 2160 2161 /* Set the create mode (note dependency on the session type) */ 2162 data->o_arg.createmode = NFS4_CREATE_UNCHECKED; 2163 if (data->o_arg.open_flags & O_EXCL) { 2164 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE; 2165 if (nfs4_has_persistent_session(clp)) 2166 data->o_arg.createmode = NFS4_CREATE_GUARDED; 2167 else if (clp->cl_mvops->minor_version > 0) 2168 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1; 2169 } 2170 return; 2171 unlock_no_action: 2172 trace_nfs4_cached_open(data->state); 2173 rcu_read_unlock(); 2174 out_no_action: 2175 task->tk_action = NULL; 2176 out_wait: 2177 nfs4_sequence_done(task, &data->o_res.seq_res); 2178 } 2179 2180 static void nfs4_open_done(struct rpc_task *task, void *calldata) 2181 { 2182 struct nfs4_opendata *data = calldata; 2183 2184 data->rpc_status = task->tk_status; 2185 2186 if (!nfs4_sequence_process(task, &data->o_res.seq_res)) 2187 return; 2188 2189 if (task->tk_status == 0) { 2190 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) { 2191 switch (data->o_res.f_attr->mode & S_IFMT) { 2192 case S_IFREG: 2193 break; 2194 case S_IFLNK: 2195 data->rpc_status = -ELOOP; 2196 break; 2197 case S_IFDIR: 2198 data->rpc_status = -EISDIR; 2199 break; 2200 default: 2201 data->rpc_status = -ENOTDIR; 2202 } 2203 } 2204 renew_lease(data->o_res.server, data->timestamp); 2205 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)) 2206 nfs_confirm_seqid(&data->owner->so_seqid, 0); 2207 } 2208 data->rpc_done = 1; 2209 } 2210 2211 static void nfs4_open_release(void *calldata) 2212 { 2213 struct nfs4_opendata *data = calldata; 2214 struct nfs4_state *state = NULL; 2215 2216 /* If this request hasn't been cancelled, do nothing */ 2217 if (data->cancelled == 0) 2218 goto out_free; 2219 /* In case of error, no cleanup! */ 2220 if (data->rpc_status != 0 || !data->rpc_done) 2221 goto out_free; 2222 /* In case we need an open_confirm, no cleanup! */ 2223 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM) 2224 goto out_free; 2225 state = nfs4_opendata_to_nfs4_state(data); 2226 if (!IS_ERR(state)) 2227 nfs4_close_state(state, data->o_arg.fmode); 2228 out_free: 2229 nfs4_opendata_put(data); 2230 } 2231 2232 static const struct rpc_call_ops nfs4_open_ops = { 2233 .rpc_call_prepare = nfs4_open_prepare, 2234 .rpc_call_done = nfs4_open_done, 2235 .rpc_release = nfs4_open_release, 2236 }; 2237 2238 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover) 2239 { 2240 struct inode *dir = d_inode(data->dir); 2241 struct nfs_server *server = NFS_SERVER(dir); 2242 struct nfs_openargs *o_arg = &data->o_arg; 2243 struct nfs_openres *o_res = &data->o_res; 2244 struct rpc_task *task; 2245 struct rpc_message msg = { 2246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN], 2247 .rpc_argp = o_arg, 2248 .rpc_resp = o_res, 2249 .rpc_cred = data->owner->so_cred, 2250 }; 2251 struct rpc_task_setup task_setup_data = { 2252 .rpc_client = server->client, 2253 .rpc_message = &msg, 2254 .callback_ops = &nfs4_open_ops, 2255 .callback_data = data, 2256 .workqueue = nfsiod_workqueue, 2257 .flags = RPC_TASK_ASYNC, 2258 }; 2259 int status; 2260 2261 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1); 2262 kref_get(&data->kref); 2263 data->rpc_done = 0; 2264 data->rpc_status = 0; 2265 data->cancelled = 0; 2266 data->is_recover = 0; 2267 if (isrecover) { 2268 nfs4_set_sequence_privileged(&o_arg->seq_args); 2269 data->is_recover = 1; 2270 } 2271 task = rpc_run_task(&task_setup_data); 2272 if (IS_ERR(task)) 2273 return PTR_ERR(task); 2274 status = nfs4_wait_for_completion_rpc_task(task); 2275 if (status != 0) { 2276 data->cancelled = 1; 2277 smp_wmb(); 2278 } else 2279 status = data->rpc_status; 2280 rpc_put_task(task); 2281 2282 return status; 2283 } 2284 2285 static int _nfs4_recover_proc_open(struct nfs4_opendata *data) 2286 { 2287 struct inode *dir = d_inode(data->dir); 2288 struct nfs_openres *o_res = &data->o_res; 2289 int status; 2290 2291 status = nfs4_run_open_task(data, 1); 2292 if (status != 0 || !data->rpc_done) 2293 return status; 2294 2295 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr); 2296 2297 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2298 status = _nfs4_proc_open_confirm(data); 2299 if (status != 0) 2300 return status; 2301 } 2302 2303 return status; 2304 } 2305 2306 /* 2307 * Additional permission checks in order to distinguish between an 2308 * open for read, and an open for execute. This works around the 2309 * fact that NFSv4 OPEN treats read and execute permissions as being 2310 * the same. 2311 * Note that in the non-execute case, we want to turn off permission 2312 * checking if we just created a new file (POSIX open() semantics). 2313 */ 2314 static int nfs4_opendata_access(struct rpc_cred *cred, 2315 struct nfs4_opendata *opendata, 2316 struct nfs4_state *state, fmode_t fmode, 2317 int openflags) 2318 { 2319 struct nfs_access_entry cache; 2320 u32 mask; 2321 2322 /* access call failed or for some reason the server doesn't 2323 * support any access modes -- defer access call until later */ 2324 if (opendata->o_res.access_supported == 0) 2325 return 0; 2326 2327 mask = 0; 2328 /* 2329 * Use openflags to check for exec, because fmode won't 2330 * always have FMODE_EXEC set when file open for exec. 2331 */ 2332 if (openflags & __FMODE_EXEC) { 2333 /* ONLY check for exec rights */ 2334 mask = MAY_EXEC; 2335 } else if ((fmode & FMODE_READ) && !opendata->file_created) 2336 mask = MAY_READ; 2337 2338 cache.cred = cred; 2339 cache.jiffies = jiffies; 2340 nfs_access_set_mask(&cache, opendata->o_res.access_result); 2341 nfs_access_add_cache(state->inode, &cache); 2342 2343 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0) 2344 return 0; 2345 2346 /* even though OPEN succeeded, access is denied. Close the file */ 2347 nfs4_close_state(state, fmode); 2348 return -EACCES; 2349 } 2350 2351 /* 2352 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata 2353 */ 2354 static int _nfs4_proc_open(struct nfs4_opendata *data) 2355 { 2356 struct inode *dir = d_inode(data->dir); 2357 struct nfs_server *server = NFS_SERVER(dir); 2358 struct nfs_openargs *o_arg = &data->o_arg; 2359 struct nfs_openres *o_res = &data->o_res; 2360 int status; 2361 2362 status = nfs4_run_open_task(data, 0); 2363 if (!data->rpc_done) 2364 return status; 2365 if (status != 0) { 2366 if (status == -NFS4ERR_BADNAME && 2367 !(o_arg->open_flags & O_CREAT)) 2368 return -ENOENT; 2369 return status; 2370 } 2371 2372 nfs_fattr_map_and_free_names(server, &data->f_attr); 2373 2374 if (o_arg->open_flags & O_CREAT) { 2375 update_changeattr(dir, &o_res->cinfo); 2376 if (o_arg->open_flags & O_EXCL) 2377 data->file_created = 1; 2378 else if (o_res->cinfo.before != o_res->cinfo.after) 2379 data->file_created = 1; 2380 } 2381 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0) 2382 server->caps &= ~NFS_CAP_POSIX_LOCK; 2383 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) { 2384 status = _nfs4_proc_open_confirm(data); 2385 if (status != 0) 2386 return status; 2387 } 2388 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) 2389 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label); 2390 return 0; 2391 } 2392 2393 static int nfs4_recover_expired_lease(struct nfs_server *server) 2394 { 2395 return nfs4_client_recover_expired_lease(server->nfs_client); 2396 } 2397 2398 /* 2399 * OPEN_EXPIRED: 2400 * reclaim state on the server after a network partition. 2401 * Assumes caller holds the appropriate lock 2402 */ 2403 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2404 { 2405 struct nfs4_opendata *opendata; 2406 int ret; 2407 2408 opendata = nfs4_open_recoverdata_alloc(ctx, state, 2409 NFS4_OPEN_CLAIM_FH); 2410 if (IS_ERR(opendata)) 2411 return PTR_ERR(opendata); 2412 ret = nfs4_open_recover(opendata, state); 2413 if (ret == -ESTALE) 2414 d_drop(ctx->dentry); 2415 nfs4_opendata_put(opendata); 2416 return ret; 2417 } 2418 2419 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state) 2420 { 2421 struct nfs_server *server = NFS_SERVER(state->inode); 2422 struct nfs4_exception exception = { }; 2423 int err; 2424 2425 do { 2426 err = _nfs4_open_expired(ctx, state); 2427 trace_nfs4_open_expired(ctx, 0, err); 2428 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception)) 2429 continue; 2430 switch (err) { 2431 default: 2432 goto out; 2433 case -NFS4ERR_GRACE: 2434 case -NFS4ERR_DELAY: 2435 nfs4_handle_exception(server, err, &exception); 2436 err = 0; 2437 } 2438 } while (exception.retry); 2439 out: 2440 return err; 2441 } 2442 2443 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2444 { 2445 struct nfs_open_context *ctx; 2446 int ret; 2447 2448 ctx = nfs4_state_find_open_context(state); 2449 if (IS_ERR(ctx)) 2450 return -EAGAIN; 2451 ret = nfs4_do_open_expired(ctx, state); 2452 put_nfs_open_context(ctx); 2453 return ret; 2454 } 2455 2456 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state, 2457 const nfs4_stateid *stateid) 2458 { 2459 nfs_remove_bad_delegation(state->inode, stateid); 2460 write_seqlock(&state->seqlock); 2461 nfs4_stateid_copy(&state->stateid, &state->open_stateid); 2462 write_sequnlock(&state->seqlock); 2463 clear_bit(NFS_DELEGATED_STATE, &state->flags); 2464 } 2465 2466 static void nfs40_clear_delegation_stateid(struct nfs4_state *state) 2467 { 2468 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL) 2469 nfs_finish_clear_delegation_stateid(state, NULL); 2470 } 2471 2472 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2473 { 2474 /* NFSv4.0 doesn't allow for delegation recovery on open expire */ 2475 nfs40_clear_delegation_stateid(state); 2476 return nfs4_open_expired(sp, state); 2477 } 2478 2479 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server, 2480 nfs4_stateid *stateid, 2481 struct rpc_cred *cred) 2482 { 2483 return -NFS4ERR_BAD_STATEID; 2484 } 2485 2486 #if defined(CONFIG_NFS_V4_1) 2487 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server, 2488 nfs4_stateid *stateid, 2489 struct rpc_cred *cred) 2490 { 2491 int status; 2492 2493 switch (stateid->type) { 2494 default: 2495 break; 2496 case NFS4_INVALID_STATEID_TYPE: 2497 case NFS4_SPECIAL_STATEID_TYPE: 2498 return -NFS4ERR_BAD_STATEID; 2499 case NFS4_REVOKED_STATEID_TYPE: 2500 goto out_free; 2501 } 2502 2503 status = nfs41_test_stateid(server, stateid, cred); 2504 switch (status) { 2505 case -NFS4ERR_EXPIRED: 2506 case -NFS4ERR_ADMIN_REVOKED: 2507 case -NFS4ERR_DELEG_REVOKED: 2508 break; 2509 default: 2510 return status; 2511 } 2512 out_free: 2513 /* Ack the revoked state to the server */ 2514 nfs41_free_stateid(server, stateid, cred, true); 2515 return -NFS4ERR_EXPIRED; 2516 } 2517 2518 static void nfs41_check_delegation_stateid(struct nfs4_state *state) 2519 { 2520 struct nfs_server *server = NFS_SERVER(state->inode); 2521 nfs4_stateid stateid; 2522 struct nfs_delegation *delegation; 2523 struct rpc_cred *cred; 2524 int status; 2525 2526 /* Get the delegation credential for use by test/free_stateid */ 2527 rcu_read_lock(); 2528 delegation = rcu_dereference(NFS_I(state->inode)->delegation); 2529 if (delegation == NULL) { 2530 rcu_read_unlock(); 2531 return; 2532 } 2533 2534 nfs4_stateid_copy(&stateid, &delegation->stateid); 2535 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) { 2536 rcu_read_unlock(); 2537 nfs_finish_clear_delegation_stateid(state, &stateid); 2538 return; 2539 } 2540 2541 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags)) { 2542 rcu_read_unlock(); 2543 return; 2544 } 2545 2546 cred = get_rpccred(delegation->cred); 2547 rcu_read_unlock(); 2548 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred); 2549 trace_nfs4_test_delegation_stateid(state, NULL, status); 2550 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) 2551 nfs_finish_clear_delegation_stateid(state, &stateid); 2552 2553 put_rpccred(cred); 2554 } 2555 2556 /** 2557 * nfs41_check_expired_locks - possibly free a lock stateid 2558 * 2559 * @state: NFSv4 state for an inode 2560 * 2561 * Returns NFS_OK if recovery for this stateid is now finished. 2562 * Otherwise a negative NFS4ERR value is returned. 2563 */ 2564 static int nfs41_check_expired_locks(struct nfs4_state *state) 2565 { 2566 int status, ret = NFS_OK; 2567 struct nfs4_lock_state *lsp, *prev = NULL; 2568 struct nfs_server *server = NFS_SERVER(state->inode); 2569 2570 if (!test_bit(LK_STATE_IN_USE, &state->flags)) 2571 goto out; 2572 2573 spin_lock(&state->state_lock); 2574 list_for_each_entry(lsp, &state->lock_states, ls_locks) { 2575 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) { 2576 struct rpc_cred *cred = lsp->ls_state->owner->so_cred; 2577 2578 atomic_inc(&lsp->ls_count); 2579 spin_unlock(&state->state_lock); 2580 2581 nfs4_put_lock_state(prev); 2582 prev = lsp; 2583 2584 status = nfs41_test_and_free_expired_stateid(server, 2585 &lsp->ls_stateid, 2586 cred); 2587 trace_nfs4_test_lock_stateid(state, lsp, status); 2588 if (status == -NFS4ERR_EXPIRED || 2589 status == -NFS4ERR_BAD_STATEID) { 2590 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 2591 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE; 2592 if (!recover_lost_locks) 2593 set_bit(NFS_LOCK_LOST, &lsp->ls_flags); 2594 } else if (status != NFS_OK) { 2595 ret = status; 2596 nfs4_put_lock_state(prev); 2597 goto out; 2598 } 2599 spin_lock(&state->state_lock); 2600 } 2601 } 2602 spin_unlock(&state->state_lock); 2603 nfs4_put_lock_state(prev); 2604 out: 2605 return ret; 2606 } 2607 2608 /** 2609 * nfs41_check_open_stateid - possibly free an open stateid 2610 * 2611 * @state: NFSv4 state for an inode 2612 * 2613 * Returns NFS_OK if recovery for this stateid is now finished. 2614 * Otherwise a negative NFS4ERR value is returned. 2615 */ 2616 static int nfs41_check_open_stateid(struct nfs4_state *state) 2617 { 2618 struct nfs_server *server = NFS_SERVER(state->inode); 2619 nfs4_stateid *stateid = &state->open_stateid; 2620 struct rpc_cred *cred = state->owner->so_cred; 2621 int status; 2622 2623 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) { 2624 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) { 2625 if (nfs4_have_delegation(state->inode, state->state)) 2626 return NFS_OK; 2627 return -NFS4ERR_OPENMODE; 2628 } 2629 return -NFS4ERR_BAD_STATEID; 2630 } 2631 status = nfs41_test_and_free_expired_stateid(server, stateid, cred); 2632 trace_nfs4_test_open_stateid(state, NULL, status); 2633 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) { 2634 clear_bit(NFS_O_RDONLY_STATE, &state->flags); 2635 clear_bit(NFS_O_WRONLY_STATE, &state->flags); 2636 clear_bit(NFS_O_RDWR_STATE, &state->flags); 2637 clear_bit(NFS_OPEN_STATE, &state->flags); 2638 stateid->type = NFS4_INVALID_STATEID_TYPE; 2639 } 2640 if (status != NFS_OK) 2641 return status; 2642 if (nfs_open_stateid_recover_openmode(state)) 2643 return -NFS4ERR_OPENMODE; 2644 return NFS_OK; 2645 } 2646 2647 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state) 2648 { 2649 int status; 2650 2651 nfs41_check_delegation_stateid(state); 2652 status = nfs41_check_expired_locks(state); 2653 if (status != NFS_OK) 2654 return status; 2655 status = nfs41_check_open_stateid(state); 2656 if (status != NFS_OK) 2657 status = nfs4_open_expired(sp, state); 2658 return status; 2659 } 2660 #endif 2661 2662 /* 2663 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-* 2664 * fields corresponding to attributes that were used to store the verifier. 2665 * Make sure we clobber those fields in the later setattr call 2666 */ 2667 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, 2668 struct iattr *sattr, struct nfs4_label **label) 2669 { 2670 const u32 *attrset = opendata->o_res.attrset; 2671 2672 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) && 2673 !(sattr->ia_valid & ATTR_ATIME_SET)) 2674 sattr->ia_valid |= ATTR_ATIME; 2675 2676 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) && 2677 !(sattr->ia_valid & ATTR_MTIME_SET)) 2678 sattr->ia_valid |= ATTR_MTIME; 2679 2680 /* Except MODE, it seems harmless of setting twice. */ 2681 if ((attrset[1] & FATTR4_WORD1_MODE)) 2682 sattr->ia_valid &= ~ATTR_MODE; 2683 2684 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL) 2685 *label = NULL; 2686 } 2687 2688 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata, 2689 fmode_t fmode, 2690 int flags, 2691 struct nfs_open_context *ctx) 2692 { 2693 struct nfs4_state_owner *sp = opendata->owner; 2694 struct nfs_server *server = sp->so_server; 2695 struct dentry *dentry; 2696 struct nfs4_state *state; 2697 unsigned int seq; 2698 int ret; 2699 2700 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount); 2701 2702 ret = _nfs4_proc_open(opendata); 2703 if (ret != 0) 2704 goto out; 2705 2706 state = nfs4_opendata_to_nfs4_state(opendata); 2707 ret = PTR_ERR(state); 2708 if (IS_ERR(state)) 2709 goto out; 2710 if (server->caps & NFS_CAP_POSIX_LOCK) 2711 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags); 2712 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK) 2713 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags); 2714 2715 dentry = opendata->dentry; 2716 if (d_really_is_negative(dentry)) { 2717 struct dentry *alias; 2718 d_drop(dentry); 2719 alias = d_exact_alias(dentry, state->inode); 2720 if (!alias) 2721 alias = d_splice_alias(igrab(state->inode), dentry); 2722 /* d_splice_alias() can't fail here - it's a non-directory */ 2723 if (alias) { 2724 dput(ctx->dentry); 2725 ctx->dentry = dentry = alias; 2726 } 2727 nfs_set_verifier(dentry, 2728 nfs_save_change_attribute(d_inode(opendata->dir))); 2729 } 2730 2731 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags); 2732 if (ret != 0) 2733 goto out; 2734 2735 ctx->state = state; 2736 if (d_inode(dentry) == state->inode) { 2737 nfs_inode_attach_open_context(ctx); 2738 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) 2739 nfs4_schedule_stateid_recovery(server, state); 2740 } 2741 out: 2742 return ret; 2743 } 2744 2745 /* 2746 * Returns a referenced nfs4_state 2747 */ 2748 static int _nfs4_do_open(struct inode *dir, 2749 struct nfs_open_context *ctx, 2750 int flags, 2751 struct iattr *sattr, 2752 struct nfs4_label *label, 2753 int *opened) 2754 { 2755 struct nfs4_state_owner *sp; 2756 struct nfs4_state *state = NULL; 2757 struct nfs_server *server = NFS_SERVER(dir); 2758 struct nfs4_opendata *opendata; 2759 struct dentry *dentry = ctx->dentry; 2760 struct rpc_cred *cred = ctx->cred; 2761 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold; 2762 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC); 2763 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL; 2764 struct nfs4_label *olabel = NULL; 2765 int status; 2766 2767 /* Protect against reboot recovery conflicts */ 2768 status = -ENOMEM; 2769 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL); 2770 if (sp == NULL) { 2771 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n"); 2772 goto out_err; 2773 } 2774 status = nfs4_recover_expired_lease(server); 2775 if (status != 0) 2776 goto err_put_state_owner; 2777 if (d_really_is_positive(dentry)) 2778 nfs4_return_incompatible_delegation(d_inode(dentry), fmode); 2779 status = -ENOMEM; 2780 if (d_really_is_positive(dentry)) 2781 claim = NFS4_OPEN_CLAIM_FH; 2782 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, 2783 label, claim, GFP_KERNEL); 2784 if (opendata == NULL) 2785 goto err_put_state_owner; 2786 2787 if (label) { 2788 olabel = nfs4_label_alloc(server, GFP_KERNEL); 2789 if (IS_ERR(olabel)) { 2790 status = PTR_ERR(olabel); 2791 goto err_opendata_put; 2792 } 2793 } 2794 2795 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) { 2796 if (!opendata->f_attr.mdsthreshold) { 2797 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc(); 2798 if (!opendata->f_attr.mdsthreshold) 2799 goto err_free_label; 2800 } 2801 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0]; 2802 } 2803 if (d_really_is_positive(dentry)) 2804 opendata->state = nfs4_get_open_state(d_inode(dentry), sp); 2805 2806 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx); 2807 if (status != 0) 2808 goto err_free_label; 2809 state = ctx->state; 2810 2811 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) && 2812 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) { 2813 nfs4_exclusive_attrset(opendata, sattr, &label); 2814 /* 2815 * send create attributes which was not set by open 2816 * with an extra setattr. 2817 */ 2818 if (sattr->ia_valid & NFS4_VALID_ATTRS) { 2819 nfs_fattr_init(opendata->o_res.f_attr); 2820 status = nfs4_do_setattr(state->inode, cred, 2821 opendata->o_res.f_attr, sattr, 2822 state, label, olabel); 2823 if (status == 0) { 2824 nfs_setattr_update_inode(state->inode, sattr, 2825 opendata->o_res.f_attr); 2826 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); 2827 } 2828 } 2829 } 2830 if (opened && opendata->file_created) 2831 *opened |= FILE_CREATED; 2832 2833 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) { 2834 *ctx_th = opendata->f_attr.mdsthreshold; 2835 opendata->f_attr.mdsthreshold = NULL; 2836 } 2837 2838 nfs4_label_free(olabel); 2839 2840 nfs4_opendata_put(opendata); 2841 nfs4_put_state_owner(sp); 2842 return 0; 2843 err_free_label: 2844 nfs4_label_free(olabel); 2845 err_opendata_put: 2846 nfs4_opendata_put(opendata); 2847 err_put_state_owner: 2848 nfs4_put_state_owner(sp); 2849 out_err: 2850 return status; 2851 } 2852 2853 2854 static struct nfs4_state *nfs4_do_open(struct inode *dir, 2855 struct nfs_open_context *ctx, 2856 int flags, 2857 struct iattr *sattr, 2858 struct nfs4_label *label, 2859 int *opened) 2860 { 2861 struct nfs_server *server = NFS_SERVER(dir); 2862 struct nfs4_exception exception = { }; 2863 struct nfs4_state *res; 2864 int status; 2865 2866 do { 2867 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened); 2868 res = ctx->state; 2869 trace_nfs4_open_file(ctx, flags, status); 2870 if (status == 0) 2871 break; 2872 /* NOTE: BAD_SEQID means the server and client disagree about the 2873 * book-keeping w.r.t. state-changing operations 2874 * (OPEN/CLOSE/LOCK/LOCKU...) 2875 * It is actually a sign of a bug on the client or on the server. 2876 * 2877 * If we receive a BAD_SEQID error in the particular case of 2878 * doing an OPEN, we assume that nfs_increment_open_seqid() will 2879 * have unhashed the old state_owner for us, and that we can 2880 * therefore safely retry using a new one. We should still warn 2881 * the user though... 2882 */ 2883 if (status == -NFS4ERR_BAD_SEQID) { 2884 pr_warn_ratelimited("NFS: v4 server %s " 2885 " returned a bad sequence-id error!\n", 2886 NFS_SERVER(dir)->nfs_client->cl_hostname); 2887 exception.retry = 1; 2888 continue; 2889 } 2890 /* 2891 * BAD_STATEID on OPEN means that the server cancelled our 2892 * state before it received the OPEN_CONFIRM. 2893 * Recover by retrying the request as per the discussion 2894 * on Page 181 of RFC3530. 2895 */ 2896 if (status == -NFS4ERR_BAD_STATEID) { 2897 exception.retry = 1; 2898 continue; 2899 } 2900 if (status == -EAGAIN) { 2901 /* We must have found a delegation */ 2902 exception.retry = 1; 2903 continue; 2904 } 2905 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception)) 2906 continue; 2907 res = ERR_PTR(nfs4_handle_exception(server, 2908 status, &exception)); 2909 } while (exception.retry); 2910 return res; 2911 } 2912 2913 static int _nfs4_do_setattr(struct inode *inode, 2914 struct nfs_setattrargs *arg, 2915 struct nfs_setattrres *res, 2916 struct rpc_cred *cred, 2917 struct nfs4_state *state) 2918 { 2919 struct nfs_server *server = NFS_SERVER(inode); 2920 struct rpc_message msg = { 2921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 2922 .rpc_argp = arg, 2923 .rpc_resp = res, 2924 .rpc_cred = cred, 2925 }; 2926 struct rpc_cred *delegation_cred = NULL; 2927 unsigned long timestamp = jiffies; 2928 fmode_t fmode; 2929 bool truncate; 2930 int status; 2931 2932 nfs_fattr_init(res->fattr); 2933 2934 /* Servers should only apply open mode checks for file size changes */ 2935 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false; 2936 fmode = truncate ? FMODE_WRITE : FMODE_READ; 2937 2938 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) { 2939 /* Use that stateid */ 2940 } else if (truncate && state != NULL) { 2941 struct nfs_lockowner lockowner = { 2942 .l_owner = current->files, 2943 .l_pid = current->tgid, 2944 }; 2945 if (!nfs4_valid_open_stateid(state)) 2946 return -EBADF; 2947 if (nfs4_select_rw_stateid(state, FMODE_WRITE, &lockowner, 2948 &arg->stateid, &delegation_cred) == -EIO) 2949 return -EBADF; 2950 } else 2951 nfs4_stateid_copy(&arg->stateid, &zero_stateid); 2952 if (delegation_cred) 2953 msg.rpc_cred = delegation_cred; 2954 2955 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1); 2956 2957 put_rpccred(delegation_cred); 2958 if (status == 0 && state != NULL) 2959 renew_lease(server, timestamp); 2960 trace_nfs4_setattr(inode, &arg->stateid, status); 2961 return status; 2962 } 2963 2964 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, 2965 struct nfs_fattr *fattr, struct iattr *sattr, 2966 struct nfs4_state *state, struct nfs4_label *ilabel, 2967 struct nfs4_label *olabel) 2968 { 2969 struct nfs_server *server = NFS_SERVER(inode); 2970 struct nfs_setattrargs arg = { 2971 .fh = NFS_FH(inode), 2972 .iap = sattr, 2973 .server = server, 2974 .bitmask = server->attr_bitmask, 2975 .label = ilabel, 2976 }; 2977 struct nfs_setattrres res = { 2978 .fattr = fattr, 2979 .label = olabel, 2980 .server = server, 2981 }; 2982 struct nfs4_exception exception = { 2983 .state = state, 2984 .inode = inode, 2985 .stateid = &arg.stateid, 2986 }; 2987 int err; 2988 2989 arg.bitmask = nfs4_bitmask(server, ilabel); 2990 if (ilabel) 2991 arg.bitmask = nfs4_bitmask(server, olabel); 2992 2993 do { 2994 err = _nfs4_do_setattr(inode, &arg, &res, cred, state); 2995 switch (err) { 2996 case -NFS4ERR_OPENMODE: 2997 if (!(sattr->ia_valid & ATTR_SIZE)) { 2998 pr_warn_once("NFSv4: server %s is incorrectly " 2999 "applying open mode checks to " 3000 "a SETATTR that is not " 3001 "changing file size.\n", 3002 server->nfs_client->cl_hostname); 3003 } 3004 if (state && !(state->state & FMODE_WRITE)) { 3005 err = -EBADF; 3006 if (sattr->ia_valid & ATTR_OPEN) 3007 err = -EACCES; 3008 goto out; 3009 } 3010 } 3011 err = nfs4_handle_exception(server, err, &exception); 3012 } while (exception.retry); 3013 out: 3014 return err; 3015 } 3016 3017 static bool 3018 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task) 3019 { 3020 if (inode == NULL || !nfs_have_layout(inode)) 3021 return false; 3022 3023 return pnfs_wait_on_layoutreturn(inode, task); 3024 } 3025 3026 struct nfs4_closedata { 3027 struct inode *inode; 3028 struct nfs4_state *state; 3029 struct nfs_closeargs arg; 3030 struct nfs_closeres res; 3031 struct nfs_fattr fattr; 3032 unsigned long timestamp; 3033 bool roc; 3034 u32 roc_barrier; 3035 }; 3036 3037 static void nfs4_free_closedata(void *data) 3038 { 3039 struct nfs4_closedata *calldata = data; 3040 struct nfs4_state_owner *sp = calldata->state->owner; 3041 struct super_block *sb = calldata->state->inode->i_sb; 3042 3043 if (calldata->roc) 3044 pnfs_roc_release(calldata->state->inode); 3045 nfs4_put_open_state(calldata->state); 3046 nfs_free_seqid(calldata->arg.seqid); 3047 nfs4_put_state_owner(sp); 3048 nfs_sb_deactive(sb); 3049 kfree(calldata); 3050 } 3051 3052 static void nfs4_close_done(struct rpc_task *task, void *data) 3053 { 3054 struct nfs4_closedata *calldata = data; 3055 struct nfs4_state *state = calldata->state; 3056 struct nfs_server *server = NFS_SERVER(calldata->inode); 3057 nfs4_stateid *res_stateid = NULL; 3058 3059 dprintk("%s: begin!\n", __func__); 3060 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 3061 return; 3062 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status); 3063 /* hmm. we are done with the inode, and in the process of freeing 3064 * the state_owner. we keep this around to process errors 3065 */ 3066 switch (task->tk_status) { 3067 case 0: 3068 res_stateid = &calldata->res.stateid; 3069 if (calldata->roc) 3070 pnfs_roc_set_barrier(state->inode, 3071 calldata->roc_barrier); 3072 renew_lease(server, calldata->timestamp); 3073 break; 3074 case -NFS4ERR_ADMIN_REVOKED: 3075 case -NFS4ERR_STALE_STATEID: 3076 case -NFS4ERR_EXPIRED: 3077 nfs4_free_revoked_stateid(server, 3078 &calldata->arg.stateid, 3079 task->tk_msg.rpc_cred); 3080 case -NFS4ERR_OLD_STATEID: 3081 case -NFS4ERR_BAD_STATEID: 3082 if (!nfs4_stateid_match(&calldata->arg.stateid, 3083 &state->open_stateid)) { 3084 rpc_restart_call_prepare(task); 3085 goto out_release; 3086 } 3087 if (calldata->arg.fmode == 0) 3088 break; 3089 default: 3090 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) { 3091 rpc_restart_call_prepare(task); 3092 goto out_release; 3093 } 3094 } 3095 nfs_clear_open_stateid(state, &calldata->arg.stateid, 3096 res_stateid, calldata->arg.fmode); 3097 out_release: 3098 nfs_release_seqid(calldata->arg.seqid); 3099 nfs_refresh_inode(calldata->inode, calldata->res.fattr); 3100 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status); 3101 } 3102 3103 static void nfs4_close_prepare(struct rpc_task *task, void *data) 3104 { 3105 struct nfs4_closedata *calldata = data; 3106 struct nfs4_state *state = calldata->state; 3107 struct inode *inode = calldata->inode; 3108 bool is_rdonly, is_wronly, is_rdwr; 3109 int call_close = 0; 3110 3111 dprintk("%s: begin!\n", __func__); 3112 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 3113 goto out_wait; 3114 3115 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE]; 3116 spin_lock(&state->owner->so_lock); 3117 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags); 3118 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags); 3119 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags); 3120 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid); 3121 /* Calculate the change in open mode */ 3122 calldata->arg.fmode = 0; 3123 if (state->n_rdwr == 0) { 3124 if (state->n_rdonly == 0) 3125 call_close |= is_rdonly; 3126 else if (is_rdonly) 3127 calldata->arg.fmode |= FMODE_READ; 3128 if (state->n_wronly == 0) 3129 call_close |= is_wronly; 3130 else if (is_wronly) 3131 calldata->arg.fmode |= FMODE_WRITE; 3132 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE)) 3133 call_close |= is_rdwr; 3134 } else if (is_rdwr) 3135 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE; 3136 3137 if (!nfs4_valid_open_stateid(state) || 3138 test_bit(NFS_OPEN_STATE, &state->flags) == 0) 3139 call_close = 0; 3140 spin_unlock(&state->owner->so_lock); 3141 3142 if (!call_close) { 3143 /* Note: exit _without_ calling nfs4_close_done */ 3144 goto out_no_action; 3145 } 3146 3147 if (nfs4_wait_on_layoutreturn(inode, task)) { 3148 nfs_release_seqid(calldata->arg.seqid); 3149 goto out_wait; 3150 } 3151 3152 if (calldata->arg.fmode == 0) 3153 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE]; 3154 if (calldata->roc) 3155 pnfs_roc_get_barrier(inode, &calldata->roc_barrier); 3156 3157 calldata->arg.share_access = 3158 nfs4_map_atomic_open_share(NFS_SERVER(inode), 3159 calldata->arg.fmode, 0); 3160 3161 nfs_fattr_init(calldata->res.fattr); 3162 calldata->timestamp = jiffies; 3163 if (nfs4_setup_sequence(NFS_SERVER(inode), 3164 &calldata->arg.seq_args, 3165 &calldata->res.seq_res, 3166 task) != 0) 3167 nfs_release_seqid(calldata->arg.seqid); 3168 dprintk("%s: done!\n", __func__); 3169 return; 3170 out_no_action: 3171 task->tk_action = NULL; 3172 out_wait: 3173 nfs4_sequence_done(task, &calldata->res.seq_res); 3174 } 3175 3176 static const struct rpc_call_ops nfs4_close_ops = { 3177 .rpc_call_prepare = nfs4_close_prepare, 3178 .rpc_call_done = nfs4_close_done, 3179 .rpc_release = nfs4_free_closedata, 3180 }; 3181 3182 static bool nfs4_roc(struct inode *inode) 3183 { 3184 if (!nfs_have_layout(inode)) 3185 return false; 3186 return pnfs_roc(inode); 3187 } 3188 3189 /* 3190 * It is possible for data to be read/written from a mem-mapped file 3191 * after the sys_close call (which hits the vfs layer as a flush). 3192 * This means that we can't safely call nfsv4 close on a file until 3193 * the inode is cleared. This in turn means that we are not good 3194 * NFSv4 citizens - we do not indicate to the server to update the file's 3195 * share state even when we are done with one of the three share 3196 * stateid's in the inode. 3197 * 3198 * NOTE: Caller must be holding the sp->so_owner semaphore! 3199 */ 3200 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait) 3201 { 3202 struct nfs_server *server = NFS_SERVER(state->inode); 3203 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 3204 struct nfs4_closedata *calldata; 3205 struct nfs4_state_owner *sp = state->owner; 3206 struct rpc_task *task; 3207 struct rpc_message msg = { 3208 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE], 3209 .rpc_cred = state->owner->so_cred, 3210 }; 3211 struct rpc_task_setup task_setup_data = { 3212 .rpc_client = server->client, 3213 .rpc_message = &msg, 3214 .callback_ops = &nfs4_close_ops, 3215 .workqueue = nfsiod_workqueue, 3216 .flags = RPC_TASK_ASYNC, 3217 }; 3218 int status = -ENOMEM; 3219 3220 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP, 3221 &task_setup_data.rpc_client, &msg); 3222 3223 calldata = kzalloc(sizeof(*calldata), gfp_mask); 3224 if (calldata == NULL) 3225 goto out; 3226 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1); 3227 calldata->inode = state->inode; 3228 calldata->state = state; 3229 calldata->arg.fh = NFS_FH(state->inode); 3230 /* Serialization for the sequence id */ 3231 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 3232 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask); 3233 if (IS_ERR(calldata->arg.seqid)) 3234 goto out_free_calldata; 3235 calldata->arg.fmode = 0; 3236 calldata->arg.bitmask = server->cache_consistency_bitmask; 3237 calldata->res.fattr = &calldata->fattr; 3238 calldata->res.seqid = calldata->arg.seqid; 3239 calldata->res.server = server; 3240 calldata->roc = nfs4_roc(state->inode); 3241 nfs_sb_active(calldata->inode->i_sb); 3242 3243 msg.rpc_argp = &calldata->arg; 3244 msg.rpc_resp = &calldata->res; 3245 task_setup_data.callback_data = calldata; 3246 task = rpc_run_task(&task_setup_data); 3247 if (IS_ERR(task)) 3248 return PTR_ERR(task); 3249 status = 0; 3250 if (wait) 3251 status = rpc_wait_for_completion_task(task); 3252 rpc_put_task(task); 3253 return status; 3254 out_free_calldata: 3255 kfree(calldata); 3256 out: 3257 nfs4_put_open_state(state); 3258 nfs4_put_state_owner(sp); 3259 return status; 3260 } 3261 3262 static struct inode * 3263 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, 3264 int open_flags, struct iattr *attr, int *opened) 3265 { 3266 struct nfs4_state *state; 3267 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; 3268 3269 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); 3270 3271 /* Protect against concurrent sillydeletes */ 3272 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened); 3273 3274 nfs4_label_release_security(label); 3275 3276 if (IS_ERR(state)) 3277 return ERR_CAST(state); 3278 return state->inode; 3279 } 3280 3281 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync) 3282 { 3283 if (ctx->state == NULL) 3284 return; 3285 if (is_sync) 3286 nfs4_close_sync(ctx->state, ctx->mode); 3287 else 3288 nfs4_close_state(ctx->state, ctx->mode); 3289 } 3290 3291 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL) 3292 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL) 3293 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL) 3294 3295 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3296 { 3297 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion; 3298 struct nfs4_server_caps_arg args = { 3299 .fhandle = fhandle, 3300 .bitmask = bitmask, 3301 }; 3302 struct nfs4_server_caps_res res = {}; 3303 struct rpc_message msg = { 3304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS], 3305 .rpc_argp = &args, 3306 .rpc_resp = &res, 3307 }; 3308 int status; 3309 3310 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS | 3311 FATTR4_WORD0_FH_EXPIRE_TYPE | 3312 FATTR4_WORD0_LINK_SUPPORT | 3313 FATTR4_WORD0_SYMLINK_SUPPORT | 3314 FATTR4_WORD0_ACLSUPPORT; 3315 if (minorversion) 3316 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT; 3317 3318 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3319 if (status == 0) { 3320 /* Sanity check the server answers */ 3321 switch (minorversion) { 3322 case 0: 3323 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK; 3324 res.attr_bitmask[2] = 0; 3325 break; 3326 case 1: 3327 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK; 3328 break; 3329 case 2: 3330 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK; 3331 } 3332 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask)); 3333 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS| 3334 NFS_CAP_SYMLINKS|NFS_CAP_FILEID| 3335 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER| 3336 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME| 3337 NFS_CAP_CTIME|NFS_CAP_MTIME| 3338 NFS_CAP_SECURITY_LABEL); 3339 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL && 3340 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL) 3341 server->caps |= NFS_CAP_ACLS; 3342 if (res.has_links != 0) 3343 server->caps |= NFS_CAP_HARDLINKS; 3344 if (res.has_symlinks != 0) 3345 server->caps |= NFS_CAP_SYMLINKS; 3346 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID) 3347 server->caps |= NFS_CAP_FILEID; 3348 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE) 3349 server->caps |= NFS_CAP_MODE; 3350 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS) 3351 server->caps |= NFS_CAP_NLINK; 3352 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER) 3353 server->caps |= NFS_CAP_OWNER; 3354 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP) 3355 server->caps |= NFS_CAP_OWNER_GROUP; 3356 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS) 3357 server->caps |= NFS_CAP_ATIME; 3358 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA) 3359 server->caps |= NFS_CAP_CTIME; 3360 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) 3361 server->caps |= NFS_CAP_MTIME; 3362 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 3363 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) 3364 server->caps |= NFS_CAP_SECURITY_LABEL; 3365 #endif 3366 memcpy(server->attr_bitmask_nl, res.attr_bitmask, 3367 sizeof(server->attr_bitmask)); 3368 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; 3369 3370 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); 3371 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; 3372 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; 3373 server->cache_consistency_bitmask[2] = 0; 3374 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask, 3375 sizeof(server->exclcreat_bitmask)); 3376 server->acl_bitmask = res.acl_bitmask; 3377 server->fh_expire_type = res.fh_expire_type; 3378 } 3379 3380 return status; 3381 } 3382 3383 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) 3384 { 3385 struct nfs4_exception exception = { }; 3386 int err; 3387 do { 3388 err = nfs4_handle_exception(server, 3389 _nfs4_server_capabilities(server, fhandle), 3390 &exception); 3391 } while (exception.retry); 3392 return err; 3393 } 3394 3395 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3396 struct nfs_fsinfo *info) 3397 { 3398 u32 bitmask[3]; 3399 struct nfs4_lookup_root_arg args = { 3400 .bitmask = bitmask, 3401 }; 3402 struct nfs4_lookup_res res = { 3403 .server = server, 3404 .fattr = info->fattr, 3405 .fh = fhandle, 3406 }; 3407 struct rpc_message msg = { 3408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT], 3409 .rpc_argp = &args, 3410 .rpc_resp = &res, 3411 }; 3412 3413 bitmask[0] = nfs4_fattr_bitmap[0]; 3414 bitmask[1] = nfs4_fattr_bitmap[1]; 3415 /* 3416 * Process the label in the upcoming getfattr 3417 */ 3418 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; 3419 3420 nfs_fattr_init(info->fattr); 3421 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3422 } 3423 3424 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, 3425 struct nfs_fsinfo *info) 3426 { 3427 struct nfs4_exception exception = { }; 3428 int err; 3429 do { 3430 err = _nfs4_lookup_root(server, fhandle, info); 3431 trace_nfs4_lookup_root(server, fhandle, info->fattr, err); 3432 switch (err) { 3433 case 0: 3434 case -NFS4ERR_WRONGSEC: 3435 goto out; 3436 default: 3437 err = nfs4_handle_exception(server, err, &exception); 3438 } 3439 } while (exception.retry); 3440 out: 3441 return err; 3442 } 3443 3444 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3445 struct nfs_fsinfo *info, rpc_authflavor_t flavor) 3446 { 3447 struct rpc_auth_create_args auth_args = { 3448 .pseudoflavor = flavor, 3449 }; 3450 struct rpc_auth *auth; 3451 int ret; 3452 3453 auth = rpcauth_create(&auth_args, server->client); 3454 if (IS_ERR(auth)) { 3455 ret = -EACCES; 3456 goto out; 3457 } 3458 ret = nfs4_lookup_root(server, fhandle, info); 3459 out: 3460 return ret; 3461 } 3462 3463 /* 3464 * Retry pseudoroot lookup with various security flavors. We do this when: 3465 * 3466 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC 3467 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation 3468 * 3469 * Returns zero on success, or a negative NFS4ERR value, or a 3470 * negative errno value. 3471 */ 3472 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 3473 struct nfs_fsinfo *info) 3474 { 3475 /* Per 3530bis 15.33.5 */ 3476 static const rpc_authflavor_t flav_array[] = { 3477 RPC_AUTH_GSS_KRB5P, 3478 RPC_AUTH_GSS_KRB5I, 3479 RPC_AUTH_GSS_KRB5, 3480 RPC_AUTH_UNIX, /* courtesy */ 3481 RPC_AUTH_NULL, 3482 }; 3483 int status = -EPERM; 3484 size_t i; 3485 3486 if (server->auth_info.flavor_len > 0) { 3487 /* try each flavor specified by user */ 3488 for (i = 0; i < server->auth_info.flavor_len; i++) { 3489 status = nfs4_lookup_root_sec(server, fhandle, info, 3490 server->auth_info.flavors[i]); 3491 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3492 continue; 3493 break; 3494 } 3495 } else { 3496 /* no flavors specified by user, try default list */ 3497 for (i = 0; i < ARRAY_SIZE(flav_array); i++) { 3498 status = nfs4_lookup_root_sec(server, fhandle, info, 3499 flav_array[i]); 3500 if (status == -NFS4ERR_WRONGSEC || status == -EACCES) 3501 continue; 3502 break; 3503 } 3504 } 3505 3506 /* 3507 * -EACCESS could mean that the user doesn't have correct permissions 3508 * to access the mount. It could also mean that we tried to mount 3509 * with a gss auth flavor, but rpc.gssd isn't running. Either way, 3510 * existing mount programs don't handle -EACCES very well so it should 3511 * be mapped to -EPERM instead. 3512 */ 3513 if (status == -EACCES) 3514 status = -EPERM; 3515 return status; 3516 } 3517 3518 /** 3519 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot 3520 * @server: initialized nfs_server handle 3521 * @fhandle: we fill in the pseudo-fs root file handle 3522 * @info: we fill in an FSINFO struct 3523 * @auth_probe: probe the auth flavours 3524 * 3525 * Returns zero on success, or a negative errno. 3526 */ 3527 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle, 3528 struct nfs_fsinfo *info, 3529 bool auth_probe) 3530 { 3531 int status = 0; 3532 3533 if (!auth_probe) 3534 status = nfs4_lookup_root(server, fhandle, info); 3535 3536 if (auth_probe || status == NFS4ERR_WRONGSEC) 3537 status = server->nfs_client->cl_mvops->find_root_sec(server, 3538 fhandle, info); 3539 3540 if (status == 0) 3541 status = nfs4_server_capabilities(server, fhandle); 3542 if (status == 0) 3543 status = nfs4_do_fsinfo(server, fhandle, info); 3544 3545 return nfs4_map_errors(status); 3546 } 3547 3548 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh, 3549 struct nfs_fsinfo *info) 3550 { 3551 int error; 3552 struct nfs_fattr *fattr = info->fattr; 3553 struct nfs4_label *label = NULL; 3554 3555 error = nfs4_server_capabilities(server, mntfh); 3556 if (error < 0) { 3557 dprintk("nfs4_get_root: getcaps error = %d\n", -error); 3558 return error; 3559 } 3560 3561 label = nfs4_label_alloc(server, GFP_KERNEL); 3562 if (IS_ERR(label)) 3563 return PTR_ERR(label); 3564 3565 error = nfs4_proc_getattr(server, mntfh, fattr, label); 3566 if (error < 0) { 3567 dprintk("nfs4_get_root: getattr error = %d\n", -error); 3568 goto err_free_label; 3569 } 3570 3571 if (fattr->valid & NFS_ATTR_FATTR_FSID && 3572 !nfs_fsid_equal(&server->fsid, &fattr->fsid)) 3573 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid)); 3574 3575 err_free_label: 3576 nfs4_label_free(label); 3577 3578 return error; 3579 } 3580 3581 /* 3582 * Get locations and (maybe) other attributes of a referral. 3583 * Note that we'll actually follow the referral later when 3584 * we detect fsid mismatch in inode revalidation 3585 */ 3586 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, 3587 const struct qstr *name, struct nfs_fattr *fattr, 3588 struct nfs_fh *fhandle) 3589 { 3590 int status = -ENOMEM; 3591 struct page *page = NULL; 3592 struct nfs4_fs_locations *locations = NULL; 3593 3594 page = alloc_page(GFP_KERNEL); 3595 if (page == NULL) 3596 goto out; 3597 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL); 3598 if (locations == NULL) 3599 goto out; 3600 3601 status = nfs4_proc_fs_locations(client, dir, name, locations, page); 3602 if (status != 0) 3603 goto out; 3604 3605 /* 3606 * If the fsid didn't change, this is a migration event, not a 3607 * referral. Cause us to drop into the exception handler, which 3608 * will kick off migration recovery. 3609 */ 3610 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) { 3611 dprintk("%s: server did not return a different fsid for" 3612 " a referral at %s\n", __func__, name->name); 3613 status = -NFS4ERR_MOVED; 3614 goto out; 3615 } 3616 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */ 3617 nfs_fixup_referral_attributes(&locations->fattr); 3618 3619 /* replace the lookup nfs_fattr with the locations nfs_fattr */ 3620 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr)); 3621 memset(fhandle, 0, sizeof(struct nfs_fh)); 3622 out: 3623 if (page) 3624 __free_page(page); 3625 kfree(locations); 3626 return status; 3627 } 3628 3629 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3630 struct nfs_fattr *fattr, struct nfs4_label *label) 3631 { 3632 struct nfs4_getattr_arg args = { 3633 .fh = fhandle, 3634 .bitmask = server->attr_bitmask, 3635 }; 3636 struct nfs4_getattr_res res = { 3637 .fattr = fattr, 3638 .label = label, 3639 .server = server, 3640 }; 3641 struct rpc_message msg = { 3642 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 3643 .rpc_argp = &args, 3644 .rpc_resp = &res, 3645 }; 3646 3647 args.bitmask = nfs4_bitmask(server, label); 3648 3649 nfs_fattr_init(fattr); 3650 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3651 } 3652 3653 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, 3654 struct nfs_fattr *fattr, struct nfs4_label *label) 3655 { 3656 struct nfs4_exception exception = { }; 3657 int err; 3658 do { 3659 err = _nfs4_proc_getattr(server, fhandle, fattr, label); 3660 trace_nfs4_getattr(server, fhandle, fattr, err); 3661 err = nfs4_handle_exception(server, err, 3662 &exception); 3663 } while (exception.retry); 3664 return err; 3665 } 3666 3667 /* 3668 * The file is not closed if it is opened due to the a request to change 3669 * the size of the file. The open call will not be needed once the 3670 * VFS layer lookup-intents are implemented. 3671 * 3672 * Close is called when the inode is destroyed. 3673 * If we haven't opened the file for O_WRONLY, we 3674 * need to in the size_change case to obtain a stateid. 3675 * 3676 * Got race? 3677 * Because OPEN is always done by name in nfsv4, it is 3678 * possible that we opened a different file by the same 3679 * name. We can recognize this race condition, but we 3680 * can't do anything about it besides returning an error. 3681 * 3682 * This will be fixed with VFS changes (lookup-intent). 3683 */ 3684 static int 3685 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, 3686 struct iattr *sattr) 3687 { 3688 struct inode *inode = d_inode(dentry); 3689 struct rpc_cred *cred = NULL; 3690 struct nfs4_state *state = NULL; 3691 struct nfs4_label *label = NULL; 3692 int status; 3693 3694 if (pnfs_ld_layoutret_on_setattr(inode) && 3695 sattr->ia_valid & ATTR_SIZE && 3696 sattr->ia_size < i_size_read(inode)) 3697 pnfs_commit_and_return_layout(inode); 3698 3699 nfs_fattr_init(fattr); 3700 3701 /* Deal with open(O_TRUNC) */ 3702 if (sattr->ia_valid & ATTR_OPEN) 3703 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME); 3704 3705 /* Optimization: if the end result is no change, don't RPC */ 3706 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) 3707 return 0; 3708 3709 /* Search for an existing open(O_WRITE) file */ 3710 if (sattr->ia_valid & ATTR_FILE) { 3711 struct nfs_open_context *ctx; 3712 3713 ctx = nfs_file_open_context(sattr->ia_file); 3714 if (ctx) { 3715 cred = ctx->cred; 3716 state = ctx->state; 3717 } 3718 } 3719 3720 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 3721 if (IS_ERR(label)) 3722 return PTR_ERR(label); 3723 3724 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label); 3725 if (status == 0) { 3726 nfs_setattr_update_inode(inode, sattr, fattr); 3727 nfs_setsecurity(inode, fattr, label); 3728 } 3729 nfs4_label_free(label); 3730 return status; 3731 } 3732 3733 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, 3734 const struct qstr *name, struct nfs_fh *fhandle, 3735 struct nfs_fattr *fattr, struct nfs4_label *label) 3736 { 3737 struct nfs_server *server = NFS_SERVER(dir); 3738 int status; 3739 struct nfs4_lookup_arg args = { 3740 .bitmask = server->attr_bitmask, 3741 .dir_fh = NFS_FH(dir), 3742 .name = name, 3743 }; 3744 struct nfs4_lookup_res res = { 3745 .server = server, 3746 .fattr = fattr, 3747 .label = label, 3748 .fh = fhandle, 3749 }; 3750 struct rpc_message msg = { 3751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP], 3752 .rpc_argp = &args, 3753 .rpc_resp = &res, 3754 }; 3755 3756 args.bitmask = nfs4_bitmask(server, label); 3757 3758 nfs_fattr_init(fattr); 3759 3760 dprintk("NFS call lookup %s\n", name->name); 3761 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0); 3762 dprintk("NFS reply lookup: %d\n", status); 3763 return status; 3764 } 3765 3766 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr) 3767 { 3768 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 3769 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT; 3770 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 3771 fattr->nlink = 2; 3772 } 3773 3774 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, 3775 const struct qstr *name, struct nfs_fh *fhandle, 3776 struct nfs_fattr *fattr, struct nfs4_label *label) 3777 { 3778 struct nfs4_exception exception = { }; 3779 struct rpc_clnt *client = *clnt; 3780 int err; 3781 do { 3782 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label); 3783 trace_nfs4_lookup(dir, name, err); 3784 switch (err) { 3785 case -NFS4ERR_BADNAME: 3786 err = -ENOENT; 3787 goto out; 3788 case -NFS4ERR_MOVED: 3789 err = nfs4_get_referral(client, dir, name, fattr, fhandle); 3790 if (err == -NFS4ERR_MOVED) 3791 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 3792 goto out; 3793 case -NFS4ERR_WRONGSEC: 3794 err = -EPERM; 3795 if (client != *clnt) 3796 goto out; 3797 client = nfs4_negotiate_security(client, dir, name); 3798 if (IS_ERR(client)) 3799 return PTR_ERR(client); 3800 3801 exception.retry = 1; 3802 break; 3803 default: 3804 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception); 3805 } 3806 } while (exception.retry); 3807 3808 out: 3809 if (err == 0) 3810 *clnt = client; 3811 else if (client != *clnt) 3812 rpc_shutdown_client(client); 3813 3814 return err; 3815 } 3816 3817 static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name, 3818 struct nfs_fh *fhandle, struct nfs_fattr *fattr, 3819 struct nfs4_label *label) 3820 { 3821 int status; 3822 struct rpc_clnt *client = NFS_CLIENT(dir); 3823 3824 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label); 3825 if (client != NFS_CLIENT(dir)) { 3826 rpc_shutdown_client(client); 3827 nfs_fixup_secinfo_attributes(fattr); 3828 } 3829 return status; 3830 } 3831 3832 struct rpc_clnt * 3833 nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name, 3834 struct nfs_fh *fhandle, struct nfs_fattr *fattr) 3835 { 3836 struct rpc_clnt *client = NFS_CLIENT(dir); 3837 int status; 3838 3839 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL); 3840 if (status < 0) 3841 return ERR_PTR(status); 3842 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client; 3843 } 3844 3845 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 3846 { 3847 struct nfs_server *server = NFS_SERVER(inode); 3848 struct nfs4_accessargs args = { 3849 .fh = NFS_FH(inode), 3850 .bitmask = server->cache_consistency_bitmask, 3851 }; 3852 struct nfs4_accessres res = { 3853 .server = server, 3854 }; 3855 struct rpc_message msg = { 3856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS], 3857 .rpc_argp = &args, 3858 .rpc_resp = &res, 3859 .rpc_cred = entry->cred, 3860 }; 3861 int mode = entry->mask; 3862 int status = 0; 3863 3864 /* 3865 * Determine which access bits we want to ask for... 3866 */ 3867 if (mode & MAY_READ) 3868 args.access |= NFS4_ACCESS_READ; 3869 if (S_ISDIR(inode->i_mode)) { 3870 if (mode & MAY_WRITE) 3871 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE; 3872 if (mode & MAY_EXEC) 3873 args.access |= NFS4_ACCESS_LOOKUP; 3874 } else { 3875 if (mode & MAY_WRITE) 3876 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND; 3877 if (mode & MAY_EXEC) 3878 args.access |= NFS4_ACCESS_EXECUTE; 3879 } 3880 3881 res.fattr = nfs_alloc_fattr(); 3882 if (res.fattr == NULL) 3883 return -ENOMEM; 3884 3885 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 3886 if (!status) { 3887 nfs_access_set_mask(entry, res.access); 3888 nfs_refresh_inode(inode, res.fattr); 3889 } 3890 nfs_free_fattr(res.fattr); 3891 return status; 3892 } 3893 3894 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) 3895 { 3896 struct nfs4_exception exception = { }; 3897 int err; 3898 do { 3899 err = _nfs4_proc_access(inode, entry); 3900 trace_nfs4_access(inode, err); 3901 err = nfs4_handle_exception(NFS_SERVER(inode), err, 3902 &exception); 3903 } while (exception.retry); 3904 return err; 3905 } 3906 3907 /* 3908 * TODO: For the time being, we don't try to get any attributes 3909 * along with any of the zero-copy operations READ, READDIR, 3910 * READLINK, WRITE. 3911 * 3912 * In the case of the first three, we want to put the GETATTR 3913 * after the read-type operation -- this is because it is hard 3914 * to predict the length of a GETATTR response in v4, and thus 3915 * align the READ data correctly. This means that the GETATTR 3916 * may end up partially falling into the page cache, and we should 3917 * shift it into the 'tail' of the xdr_buf before processing. 3918 * To do this efficiently, we need to know the total length 3919 * of data received, which doesn't seem to be available outside 3920 * of the RPC layer. 3921 * 3922 * In the case of WRITE, we also want to put the GETATTR after 3923 * the operation -- in this case because we want to make sure 3924 * we get the post-operation mtime and size. 3925 * 3926 * Both of these changes to the XDR layer would in fact be quite 3927 * minor, but I decided to leave them for a subsequent patch. 3928 */ 3929 static int _nfs4_proc_readlink(struct inode *inode, struct page *page, 3930 unsigned int pgbase, unsigned int pglen) 3931 { 3932 struct nfs4_readlink args = { 3933 .fh = NFS_FH(inode), 3934 .pgbase = pgbase, 3935 .pglen = pglen, 3936 .pages = &page, 3937 }; 3938 struct nfs4_readlink_res res; 3939 struct rpc_message msg = { 3940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK], 3941 .rpc_argp = &args, 3942 .rpc_resp = &res, 3943 }; 3944 3945 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0); 3946 } 3947 3948 static int nfs4_proc_readlink(struct inode *inode, struct page *page, 3949 unsigned int pgbase, unsigned int pglen) 3950 { 3951 struct nfs4_exception exception = { }; 3952 int err; 3953 do { 3954 err = _nfs4_proc_readlink(inode, page, pgbase, pglen); 3955 trace_nfs4_readlink(inode, err); 3956 err = nfs4_handle_exception(NFS_SERVER(inode), err, 3957 &exception); 3958 } while (exception.retry); 3959 return err; 3960 } 3961 3962 /* 3963 * This is just for mknod. open(O_CREAT) will always do ->open_context(). 3964 */ 3965 static int 3966 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, 3967 int flags) 3968 { 3969 struct nfs4_label l, *ilabel = NULL; 3970 struct nfs_open_context *ctx; 3971 struct nfs4_state *state; 3972 int status = 0; 3973 3974 ctx = alloc_nfs_open_context(dentry, FMODE_READ); 3975 if (IS_ERR(ctx)) 3976 return PTR_ERR(ctx); 3977 3978 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); 3979 3980 sattr->ia_mode &= ~current_umask(); 3981 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL); 3982 if (IS_ERR(state)) { 3983 status = PTR_ERR(state); 3984 goto out; 3985 } 3986 out: 3987 nfs4_label_release_security(ilabel); 3988 put_nfs_open_context(ctx); 3989 return status; 3990 } 3991 3992 static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name) 3993 { 3994 struct nfs_server *server = NFS_SERVER(dir); 3995 struct nfs_removeargs args = { 3996 .fh = NFS_FH(dir), 3997 .name = *name, 3998 }; 3999 struct nfs_removeres res = { 4000 .server = server, 4001 }; 4002 struct rpc_message msg = { 4003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE], 4004 .rpc_argp = &args, 4005 .rpc_resp = &res, 4006 }; 4007 int status; 4008 4009 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1); 4010 if (status == 0) 4011 update_changeattr(dir, &res.cinfo); 4012 return status; 4013 } 4014 4015 static int nfs4_proc_remove(struct inode *dir, const struct qstr *name) 4016 { 4017 struct nfs4_exception exception = { }; 4018 int err; 4019 do { 4020 err = _nfs4_proc_remove(dir, name); 4021 trace_nfs4_remove(dir, name, err); 4022 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4023 &exception); 4024 } while (exception.retry); 4025 return err; 4026 } 4027 4028 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) 4029 { 4030 struct nfs_server *server = NFS_SERVER(dir); 4031 struct nfs_removeargs *args = msg->rpc_argp; 4032 struct nfs_removeres *res = msg->rpc_resp; 4033 4034 res->server = server; 4035 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; 4036 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1); 4037 4038 nfs_fattr_init(res->dir_attr); 4039 } 4040 4041 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) 4042 { 4043 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb), 4044 &data->args.seq_args, 4045 &data->res.seq_res, 4046 task); 4047 } 4048 4049 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir) 4050 { 4051 struct nfs_unlinkdata *data = task->tk_calldata; 4052 struct nfs_removeres *res = &data->res; 4053 4054 if (!nfs4_sequence_done(task, &res->seq_res)) 4055 return 0; 4056 if (nfs4_async_handle_error(task, res->server, NULL, 4057 &data->timeout) == -EAGAIN) 4058 return 0; 4059 update_changeattr(dir, &res->cinfo); 4060 return 1; 4061 } 4062 4063 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir) 4064 { 4065 struct nfs_server *server = NFS_SERVER(dir); 4066 struct nfs_renameargs *arg = msg->rpc_argp; 4067 struct nfs_renameres *res = msg->rpc_resp; 4068 4069 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME]; 4070 res->server = server; 4071 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1); 4072 } 4073 4074 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data) 4075 { 4076 nfs4_setup_sequence(NFS_SERVER(data->old_dir), 4077 &data->args.seq_args, 4078 &data->res.seq_res, 4079 task); 4080 } 4081 4082 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir, 4083 struct inode *new_dir) 4084 { 4085 struct nfs_renamedata *data = task->tk_calldata; 4086 struct nfs_renameres *res = &data->res; 4087 4088 if (!nfs4_sequence_done(task, &res->seq_res)) 4089 return 0; 4090 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN) 4091 return 0; 4092 4093 update_changeattr(old_dir, &res->old_cinfo); 4094 update_changeattr(new_dir, &res->new_cinfo); 4095 return 1; 4096 } 4097 4098 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4099 { 4100 struct nfs_server *server = NFS_SERVER(inode); 4101 struct nfs4_link_arg arg = { 4102 .fh = NFS_FH(inode), 4103 .dir_fh = NFS_FH(dir), 4104 .name = name, 4105 .bitmask = server->attr_bitmask, 4106 }; 4107 struct nfs4_link_res res = { 4108 .server = server, 4109 .label = NULL, 4110 }; 4111 struct rpc_message msg = { 4112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK], 4113 .rpc_argp = &arg, 4114 .rpc_resp = &res, 4115 }; 4116 int status = -ENOMEM; 4117 4118 res.fattr = nfs_alloc_fattr(); 4119 if (res.fattr == NULL) 4120 goto out; 4121 4122 res.label = nfs4_label_alloc(server, GFP_KERNEL); 4123 if (IS_ERR(res.label)) { 4124 status = PTR_ERR(res.label); 4125 goto out; 4126 } 4127 arg.bitmask = nfs4_bitmask(server, res.label); 4128 4129 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 4130 if (!status) { 4131 update_changeattr(dir, &res.cinfo); 4132 status = nfs_post_op_update_inode(inode, res.fattr); 4133 if (!status) 4134 nfs_setsecurity(inode, res.fattr, res.label); 4135 } 4136 4137 4138 nfs4_label_free(res.label); 4139 4140 out: 4141 nfs_free_fattr(res.fattr); 4142 return status; 4143 } 4144 4145 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name) 4146 { 4147 struct nfs4_exception exception = { }; 4148 int err; 4149 do { 4150 err = nfs4_handle_exception(NFS_SERVER(inode), 4151 _nfs4_proc_link(inode, dir, name), 4152 &exception); 4153 } while (exception.retry); 4154 return err; 4155 } 4156 4157 struct nfs4_createdata { 4158 struct rpc_message msg; 4159 struct nfs4_create_arg arg; 4160 struct nfs4_create_res res; 4161 struct nfs_fh fh; 4162 struct nfs_fattr fattr; 4163 struct nfs4_label *label; 4164 }; 4165 4166 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, 4167 const struct qstr *name, struct iattr *sattr, u32 ftype) 4168 { 4169 struct nfs4_createdata *data; 4170 4171 data = kzalloc(sizeof(*data), GFP_KERNEL); 4172 if (data != NULL) { 4173 struct nfs_server *server = NFS_SERVER(dir); 4174 4175 data->label = nfs4_label_alloc(server, GFP_KERNEL); 4176 if (IS_ERR(data->label)) 4177 goto out_free; 4178 4179 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE]; 4180 data->msg.rpc_argp = &data->arg; 4181 data->msg.rpc_resp = &data->res; 4182 data->arg.dir_fh = NFS_FH(dir); 4183 data->arg.server = server; 4184 data->arg.name = name; 4185 data->arg.attrs = sattr; 4186 data->arg.ftype = ftype; 4187 data->arg.bitmask = nfs4_bitmask(server, data->label); 4188 data->res.server = server; 4189 data->res.fh = &data->fh; 4190 data->res.fattr = &data->fattr; 4191 data->res.label = data->label; 4192 nfs_fattr_init(data->res.fattr); 4193 } 4194 return data; 4195 out_free: 4196 kfree(data); 4197 return NULL; 4198 } 4199 4200 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data) 4201 { 4202 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg, 4203 &data->arg.seq_args, &data->res.seq_res, 1); 4204 if (status == 0) { 4205 update_changeattr(dir, &data->res.dir_cinfo); 4206 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label); 4207 } 4208 return status; 4209 } 4210 4211 static void nfs4_free_createdata(struct nfs4_createdata *data) 4212 { 4213 nfs4_label_free(data->label); 4214 kfree(data); 4215 } 4216 4217 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4218 struct page *page, unsigned int len, struct iattr *sattr, 4219 struct nfs4_label *label) 4220 { 4221 struct nfs4_createdata *data; 4222 int status = -ENAMETOOLONG; 4223 4224 if (len > NFS4_MAXPATHLEN) 4225 goto out; 4226 4227 status = -ENOMEM; 4228 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK); 4229 if (data == NULL) 4230 goto out; 4231 4232 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK]; 4233 data->arg.u.symlink.pages = &page; 4234 data->arg.u.symlink.len = len; 4235 data->arg.label = label; 4236 4237 status = nfs4_do_create(dir, dentry, data); 4238 4239 nfs4_free_createdata(data); 4240 out: 4241 return status; 4242 } 4243 4244 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, 4245 struct page *page, unsigned int len, struct iattr *sattr) 4246 { 4247 struct nfs4_exception exception = { }; 4248 struct nfs4_label l, *label = NULL; 4249 int err; 4250 4251 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4252 4253 do { 4254 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label); 4255 trace_nfs4_symlink(dir, &dentry->d_name, err); 4256 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4257 &exception); 4258 } while (exception.retry); 4259 4260 nfs4_label_release_security(label); 4261 return err; 4262 } 4263 4264 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4265 struct iattr *sattr, struct nfs4_label *label) 4266 { 4267 struct nfs4_createdata *data; 4268 int status = -ENOMEM; 4269 4270 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR); 4271 if (data == NULL) 4272 goto out; 4273 4274 data->arg.label = label; 4275 status = nfs4_do_create(dir, dentry, data); 4276 4277 nfs4_free_createdata(data); 4278 out: 4279 return status; 4280 } 4281 4282 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, 4283 struct iattr *sattr) 4284 { 4285 struct nfs4_exception exception = { }; 4286 struct nfs4_label l, *label = NULL; 4287 int err; 4288 4289 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4290 4291 sattr->ia_mode &= ~current_umask(); 4292 do { 4293 err = _nfs4_proc_mkdir(dir, dentry, sattr, label); 4294 trace_nfs4_mkdir(dir, &dentry->d_name, err); 4295 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4296 &exception); 4297 } while (exception.retry); 4298 nfs4_label_release_security(label); 4299 4300 return err; 4301 } 4302 4303 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 4304 u64 cookie, struct page **pages, unsigned int count, int plus) 4305 { 4306 struct inode *dir = d_inode(dentry); 4307 struct nfs4_readdir_arg args = { 4308 .fh = NFS_FH(dir), 4309 .pages = pages, 4310 .pgbase = 0, 4311 .count = count, 4312 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask, 4313 .plus = plus, 4314 }; 4315 struct nfs4_readdir_res res; 4316 struct rpc_message msg = { 4317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR], 4318 .rpc_argp = &args, 4319 .rpc_resp = &res, 4320 .rpc_cred = cred, 4321 }; 4322 int status; 4323 4324 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__, 4325 dentry, 4326 (unsigned long long)cookie); 4327 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args); 4328 res.pgbase = args.pgbase; 4329 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0); 4330 if (status >= 0) { 4331 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE); 4332 status += args.pgbase; 4333 } 4334 4335 nfs_invalidate_atime(dir); 4336 4337 dprintk("%s: returns %d\n", __func__, status); 4338 return status; 4339 } 4340 4341 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, 4342 u64 cookie, struct page **pages, unsigned int count, int plus) 4343 { 4344 struct nfs4_exception exception = { }; 4345 int err; 4346 do { 4347 err = _nfs4_proc_readdir(dentry, cred, cookie, 4348 pages, count, plus); 4349 trace_nfs4_readdir(d_inode(dentry), err); 4350 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err, 4351 &exception); 4352 } while (exception.retry); 4353 return err; 4354 } 4355 4356 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 4357 struct iattr *sattr, struct nfs4_label *label, dev_t rdev) 4358 { 4359 struct nfs4_createdata *data; 4360 int mode = sattr->ia_mode; 4361 int status = -ENOMEM; 4362 4363 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK); 4364 if (data == NULL) 4365 goto out; 4366 4367 if (S_ISFIFO(mode)) 4368 data->arg.ftype = NF4FIFO; 4369 else if (S_ISBLK(mode)) { 4370 data->arg.ftype = NF4BLK; 4371 data->arg.u.device.specdata1 = MAJOR(rdev); 4372 data->arg.u.device.specdata2 = MINOR(rdev); 4373 } 4374 else if (S_ISCHR(mode)) { 4375 data->arg.ftype = NF4CHR; 4376 data->arg.u.device.specdata1 = MAJOR(rdev); 4377 data->arg.u.device.specdata2 = MINOR(rdev); 4378 } else if (!S_ISSOCK(mode)) { 4379 status = -EINVAL; 4380 goto out_free; 4381 } 4382 4383 data->arg.label = label; 4384 status = nfs4_do_create(dir, dentry, data); 4385 out_free: 4386 nfs4_free_createdata(data); 4387 out: 4388 return status; 4389 } 4390 4391 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, 4392 struct iattr *sattr, dev_t rdev) 4393 { 4394 struct nfs4_exception exception = { }; 4395 struct nfs4_label l, *label = NULL; 4396 int err; 4397 4398 label = nfs4_label_init_security(dir, dentry, sattr, &l); 4399 4400 sattr->ia_mode &= ~current_umask(); 4401 do { 4402 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev); 4403 trace_nfs4_mknod(dir, &dentry->d_name, err); 4404 err = nfs4_handle_exception(NFS_SERVER(dir), err, 4405 &exception); 4406 } while (exception.retry); 4407 4408 nfs4_label_release_security(label); 4409 4410 return err; 4411 } 4412 4413 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, 4414 struct nfs_fsstat *fsstat) 4415 { 4416 struct nfs4_statfs_arg args = { 4417 .fh = fhandle, 4418 .bitmask = server->attr_bitmask, 4419 }; 4420 struct nfs4_statfs_res res = { 4421 .fsstat = fsstat, 4422 }; 4423 struct rpc_message msg = { 4424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS], 4425 .rpc_argp = &args, 4426 .rpc_resp = &res, 4427 }; 4428 4429 nfs_fattr_init(fsstat->fattr); 4430 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4431 } 4432 4433 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat) 4434 { 4435 struct nfs4_exception exception = { }; 4436 int err; 4437 do { 4438 err = nfs4_handle_exception(server, 4439 _nfs4_proc_statfs(server, fhandle, fsstat), 4440 &exception); 4441 } while (exception.retry); 4442 return err; 4443 } 4444 4445 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, 4446 struct nfs_fsinfo *fsinfo) 4447 { 4448 struct nfs4_fsinfo_arg args = { 4449 .fh = fhandle, 4450 .bitmask = server->attr_bitmask, 4451 }; 4452 struct nfs4_fsinfo_res res = { 4453 .fsinfo = fsinfo, 4454 }; 4455 struct rpc_message msg = { 4456 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO], 4457 .rpc_argp = &args, 4458 .rpc_resp = &res, 4459 }; 4460 4461 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4462 } 4463 4464 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 4465 { 4466 struct nfs4_exception exception = { }; 4467 unsigned long now = jiffies; 4468 int err; 4469 4470 do { 4471 err = _nfs4_do_fsinfo(server, fhandle, fsinfo); 4472 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err); 4473 if (err == 0) { 4474 nfs4_set_lease_period(server->nfs_client, 4475 fsinfo->lease_time * HZ, 4476 now); 4477 break; 4478 } 4479 err = nfs4_handle_exception(server, err, &exception); 4480 } while (exception.retry); 4481 return err; 4482 } 4483 4484 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo) 4485 { 4486 int error; 4487 4488 nfs_fattr_init(fsinfo->fattr); 4489 error = nfs4_do_fsinfo(server, fhandle, fsinfo); 4490 if (error == 0) { 4491 /* block layout checks this! */ 4492 server->pnfs_blksize = fsinfo->blksize; 4493 set_pnfs_layoutdriver(server, fhandle, fsinfo); 4494 } 4495 4496 return error; 4497 } 4498 4499 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 4500 struct nfs_pathconf *pathconf) 4501 { 4502 struct nfs4_pathconf_arg args = { 4503 .fh = fhandle, 4504 .bitmask = server->attr_bitmask, 4505 }; 4506 struct nfs4_pathconf_res res = { 4507 .pathconf = pathconf, 4508 }; 4509 struct rpc_message msg = { 4510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF], 4511 .rpc_argp = &args, 4512 .rpc_resp = &res, 4513 }; 4514 4515 /* None of the pathconf attributes are mandatory to implement */ 4516 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) { 4517 memset(pathconf, 0, sizeof(*pathconf)); 4518 return 0; 4519 } 4520 4521 nfs_fattr_init(pathconf->fattr); 4522 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 4523 } 4524 4525 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle, 4526 struct nfs_pathconf *pathconf) 4527 { 4528 struct nfs4_exception exception = { }; 4529 int err; 4530 4531 do { 4532 err = nfs4_handle_exception(server, 4533 _nfs4_proc_pathconf(server, fhandle, pathconf), 4534 &exception); 4535 } while (exception.retry); 4536 return err; 4537 } 4538 4539 int nfs4_set_rw_stateid(nfs4_stateid *stateid, 4540 const struct nfs_open_context *ctx, 4541 const struct nfs_lock_context *l_ctx, 4542 fmode_t fmode) 4543 { 4544 const struct nfs_lockowner *lockowner = NULL; 4545 4546 if (l_ctx != NULL) 4547 lockowner = &l_ctx->lockowner; 4548 return nfs4_select_rw_stateid(ctx->state, fmode, lockowner, stateid, NULL); 4549 } 4550 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid); 4551 4552 static bool nfs4_stateid_is_current(nfs4_stateid *stateid, 4553 const struct nfs_open_context *ctx, 4554 const struct nfs_lock_context *l_ctx, 4555 fmode_t fmode) 4556 { 4557 nfs4_stateid current_stateid; 4558 4559 /* If the current stateid represents a lost lock, then exit */ 4560 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO) 4561 return true; 4562 return nfs4_stateid_match(stateid, ¤t_stateid); 4563 } 4564 4565 static bool nfs4_error_stateid_expired(int err) 4566 { 4567 switch (err) { 4568 case -NFS4ERR_DELEG_REVOKED: 4569 case -NFS4ERR_ADMIN_REVOKED: 4570 case -NFS4ERR_BAD_STATEID: 4571 case -NFS4ERR_STALE_STATEID: 4572 case -NFS4ERR_OLD_STATEID: 4573 case -NFS4ERR_OPENMODE: 4574 case -NFS4ERR_EXPIRED: 4575 return true; 4576 } 4577 return false; 4578 } 4579 4580 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr) 4581 { 4582 struct nfs_server *server = NFS_SERVER(hdr->inode); 4583 4584 trace_nfs4_read(hdr, task->tk_status); 4585 if (task->tk_status < 0) { 4586 struct nfs4_exception exception = { 4587 .inode = hdr->inode, 4588 .state = hdr->args.context->state, 4589 .stateid = &hdr->args.stateid, 4590 }; 4591 task->tk_status = nfs4_async_handle_exception(task, 4592 server, task->tk_status, &exception); 4593 if (exception.retry) { 4594 rpc_restart_call_prepare(task); 4595 return -EAGAIN; 4596 } 4597 } 4598 4599 if (task->tk_status > 0) 4600 renew_lease(server, hdr->timestamp); 4601 return 0; 4602 } 4603 4604 static bool nfs4_read_stateid_changed(struct rpc_task *task, 4605 struct nfs_pgio_args *args) 4606 { 4607 4608 if (!nfs4_error_stateid_expired(task->tk_status) || 4609 nfs4_stateid_is_current(&args->stateid, 4610 args->context, 4611 args->lock_context, 4612 FMODE_READ)) 4613 return false; 4614 rpc_restart_call_prepare(task); 4615 return true; 4616 } 4617 4618 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 4619 { 4620 4621 dprintk("--> %s\n", __func__); 4622 4623 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 4624 return -EAGAIN; 4625 if (nfs4_read_stateid_changed(task, &hdr->args)) 4626 return -EAGAIN; 4627 if (task->tk_status > 0) 4628 nfs_invalidate_atime(hdr->inode); 4629 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 4630 nfs4_read_done_cb(task, hdr); 4631 } 4632 4633 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr, 4634 struct rpc_message *msg) 4635 { 4636 hdr->timestamp = jiffies; 4637 if (!hdr->pgio_done_cb) 4638 hdr->pgio_done_cb = nfs4_read_done_cb; 4639 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ]; 4640 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0); 4641 } 4642 4643 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task, 4644 struct nfs_pgio_header *hdr) 4645 { 4646 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode), 4647 &hdr->args.seq_args, 4648 &hdr->res.seq_res, 4649 task)) 4650 return 0; 4651 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context, 4652 hdr->args.lock_context, 4653 hdr->rw_ops->rw_mode) == -EIO) 4654 return -EIO; 4655 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags))) 4656 return -EIO; 4657 return 0; 4658 } 4659 4660 static int nfs4_write_done_cb(struct rpc_task *task, 4661 struct nfs_pgio_header *hdr) 4662 { 4663 struct inode *inode = hdr->inode; 4664 4665 trace_nfs4_write(hdr, task->tk_status); 4666 if (task->tk_status < 0) { 4667 struct nfs4_exception exception = { 4668 .inode = hdr->inode, 4669 .state = hdr->args.context->state, 4670 .stateid = &hdr->args.stateid, 4671 }; 4672 task->tk_status = nfs4_async_handle_exception(task, 4673 NFS_SERVER(inode), task->tk_status, 4674 &exception); 4675 if (exception.retry) { 4676 rpc_restart_call_prepare(task); 4677 return -EAGAIN; 4678 } 4679 } 4680 if (task->tk_status >= 0) { 4681 renew_lease(NFS_SERVER(inode), hdr->timestamp); 4682 nfs_writeback_update_inode(hdr); 4683 } 4684 return 0; 4685 } 4686 4687 static bool nfs4_write_stateid_changed(struct rpc_task *task, 4688 struct nfs_pgio_args *args) 4689 { 4690 4691 if (!nfs4_error_stateid_expired(task->tk_status) || 4692 nfs4_stateid_is_current(&args->stateid, 4693 args->context, 4694 args->lock_context, 4695 FMODE_WRITE)) 4696 return false; 4697 rpc_restart_call_prepare(task); 4698 return true; 4699 } 4700 4701 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr) 4702 { 4703 if (!nfs4_sequence_done(task, &hdr->res.seq_res)) 4704 return -EAGAIN; 4705 if (nfs4_write_stateid_changed(task, &hdr->args)) 4706 return -EAGAIN; 4707 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) : 4708 nfs4_write_done_cb(task, hdr); 4709 } 4710 4711 static 4712 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr) 4713 { 4714 /* Don't request attributes for pNFS or O_DIRECT writes */ 4715 if (hdr->ds_clp != NULL || hdr->dreq != NULL) 4716 return false; 4717 /* Otherwise, request attributes if and only if we don't hold 4718 * a delegation 4719 */ 4720 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0; 4721 } 4722 4723 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr, 4724 struct rpc_message *msg) 4725 { 4726 struct nfs_server *server = NFS_SERVER(hdr->inode); 4727 4728 if (!nfs4_write_need_cache_consistency_data(hdr)) { 4729 hdr->args.bitmask = NULL; 4730 hdr->res.fattr = NULL; 4731 } else 4732 hdr->args.bitmask = server->cache_consistency_bitmask; 4733 4734 if (!hdr->pgio_done_cb) 4735 hdr->pgio_done_cb = nfs4_write_done_cb; 4736 hdr->res.server = server; 4737 hdr->timestamp = jiffies; 4738 4739 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE]; 4740 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1); 4741 } 4742 4743 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data) 4744 { 4745 nfs4_setup_sequence(NFS_SERVER(data->inode), 4746 &data->args.seq_args, 4747 &data->res.seq_res, 4748 task); 4749 } 4750 4751 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data) 4752 { 4753 struct inode *inode = data->inode; 4754 4755 trace_nfs4_commit(data, task->tk_status); 4756 if (nfs4_async_handle_error(task, NFS_SERVER(inode), 4757 NULL, NULL) == -EAGAIN) { 4758 rpc_restart_call_prepare(task); 4759 return -EAGAIN; 4760 } 4761 return 0; 4762 } 4763 4764 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data) 4765 { 4766 if (!nfs4_sequence_done(task, &data->res.seq_res)) 4767 return -EAGAIN; 4768 return data->commit_done_cb(task, data); 4769 } 4770 4771 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg) 4772 { 4773 struct nfs_server *server = NFS_SERVER(data->inode); 4774 4775 if (data->commit_done_cb == NULL) 4776 data->commit_done_cb = nfs4_commit_done_cb; 4777 data->res.server = server; 4778 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT]; 4779 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 4780 } 4781 4782 struct nfs4_renewdata { 4783 struct nfs_client *client; 4784 unsigned long timestamp; 4785 }; 4786 4787 /* 4788 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special 4789 * standalone procedure for queueing an asynchronous RENEW. 4790 */ 4791 static void nfs4_renew_release(void *calldata) 4792 { 4793 struct nfs4_renewdata *data = calldata; 4794 struct nfs_client *clp = data->client; 4795 4796 if (atomic_read(&clp->cl_count) > 1) 4797 nfs4_schedule_state_renewal(clp); 4798 nfs_put_client(clp); 4799 kfree(data); 4800 } 4801 4802 static void nfs4_renew_done(struct rpc_task *task, void *calldata) 4803 { 4804 struct nfs4_renewdata *data = calldata; 4805 struct nfs_client *clp = data->client; 4806 unsigned long timestamp = data->timestamp; 4807 4808 trace_nfs4_renew_async(clp, task->tk_status); 4809 switch (task->tk_status) { 4810 case 0: 4811 break; 4812 case -NFS4ERR_LEASE_MOVED: 4813 nfs4_schedule_lease_moved_recovery(clp); 4814 break; 4815 default: 4816 /* Unless we're shutting down, schedule state recovery! */ 4817 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0) 4818 return; 4819 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) { 4820 nfs4_schedule_lease_recovery(clp); 4821 return; 4822 } 4823 nfs4_schedule_path_down_recovery(clp); 4824 } 4825 do_renew_lease(clp, timestamp); 4826 } 4827 4828 static const struct rpc_call_ops nfs4_renew_ops = { 4829 .rpc_call_done = nfs4_renew_done, 4830 .rpc_release = nfs4_renew_release, 4831 }; 4832 4833 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) 4834 { 4835 struct rpc_message msg = { 4836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 4837 .rpc_argp = clp, 4838 .rpc_cred = cred, 4839 }; 4840 struct nfs4_renewdata *data; 4841 4842 if (renew_flags == 0) 4843 return 0; 4844 if (!atomic_inc_not_zero(&clp->cl_count)) 4845 return -EIO; 4846 data = kmalloc(sizeof(*data), GFP_NOFS); 4847 if (data == NULL) 4848 return -ENOMEM; 4849 data->client = clp; 4850 data->timestamp = jiffies; 4851 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT, 4852 &nfs4_renew_ops, data); 4853 } 4854 4855 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred) 4856 { 4857 struct rpc_message msg = { 4858 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW], 4859 .rpc_argp = clp, 4860 .rpc_cred = cred, 4861 }; 4862 unsigned long now = jiffies; 4863 int status; 4864 4865 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 4866 if (status < 0) 4867 return status; 4868 do_renew_lease(clp, now); 4869 return 0; 4870 } 4871 4872 static inline int nfs4_server_supports_acls(struct nfs_server *server) 4873 { 4874 return server->caps & NFS_CAP_ACLS; 4875 } 4876 4877 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that 4878 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on 4879 * the stack. 4880 */ 4881 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE) 4882 4883 static int buf_to_pages_noslab(const void *buf, size_t buflen, 4884 struct page **pages) 4885 { 4886 struct page *newpage, **spages; 4887 int rc = 0; 4888 size_t len; 4889 spages = pages; 4890 4891 do { 4892 len = min_t(size_t, PAGE_SIZE, buflen); 4893 newpage = alloc_page(GFP_KERNEL); 4894 4895 if (newpage == NULL) 4896 goto unwind; 4897 memcpy(page_address(newpage), buf, len); 4898 buf += len; 4899 buflen -= len; 4900 *pages++ = newpage; 4901 rc++; 4902 } while (buflen != 0); 4903 4904 return rc; 4905 4906 unwind: 4907 for(; rc > 0; rc--) 4908 __free_page(spages[rc-1]); 4909 return -ENOMEM; 4910 } 4911 4912 struct nfs4_cached_acl { 4913 int cached; 4914 size_t len; 4915 char data[0]; 4916 }; 4917 4918 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl) 4919 { 4920 struct nfs_inode *nfsi = NFS_I(inode); 4921 4922 spin_lock(&inode->i_lock); 4923 kfree(nfsi->nfs4_acl); 4924 nfsi->nfs4_acl = acl; 4925 spin_unlock(&inode->i_lock); 4926 } 4927 4928 static void nfs4_zap_acl_attr(struct inode *inode) 4929 { 4930 nfs4_set_cached_acl(inode, NULL); 4931 } 4932 4933 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen) 4934 { 4935 struct nfs_inode *nfsi = NFS_I(inode); 4936 struct nfs4_cached_acl *acl; 4937 int ret = -ENOENT; 4938 4939 spin_lock(&inode->i_lock); 4940 acl = nfsi->nfs4_acl; 4941 if (acl == NULL) 4942 goto out; 4943 if (buf == NULL) /* user is just asking for length */ 4944 goto out_len; 4945 if (acl->cached == 0) 4946 goto out; 4947 ret = -ERANGE; /* see getxattr(2) man page */ 4948 if (acl->len > buflen) 4949 goto out; 4950 memcpy(buf, acl->data, acl->len); 4951 out_len: 4952 ret = acl->len; 4953 out: 4954 spin_unlock(&inode->i_lock); 4955 return ret; 4956 } 4957 4958 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len) 4959 { 4960 struct nfs4_cached_acl *acl; 4961 size_t buflen = sizeof(*acl) + acl_len; 4962 4963 if (buflen <= PAGE_SIZE) { 4964 acl = kmalloc(buflen, GFP_KERNEL); 4965 if (acl == NULL) 4966 goto out; 4967 acl->cached = 1; 4968 _copy_from_pages(acl->data, pages, pgbase, acl_len); 4969 } else { 4970 acl = kmalloc(sizeof(*acl), GFP_KERNEL); 4971 if (acl == NULL) 4972 goto out; 4973 acl->cached = 0; 4974 } 4975 acl->len = acl_len; 4976 out: 4977 nfs4_set_cached_acl(inode, acl); 4978 } 4979 4980 /* 4981 * The getxattr API returns the required buffer length when called with a 4982 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating 4983 * the required buf. On a NULL buf, we send a page of data to the server 4984 * guessing that the ACL request can be serviced by a page. If so, we cache 4985 * up to the page of ACL data, and the 2nd call to getxattr is serviced by 4986 * the cache. If not so, we throw away the page, and cache the required 4987 * length. The next getxattr call will then produce another round trip to 4988 * the server, this time with the input buf of the required size. 4989 */ 4990 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 4991 { 4992 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, }; 4993 struct nfs_getaclargs args = { 4994 .fh = NFS_FH(inode), 4995 .acl_pages = pages, 4996 .acl_len = buflen, 4997 }; 4998 struct nfs_getaclres res = { 4999 .acl_len = buflen, 5000 }; 5001 struct rpc_message msg = { 5002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL], 5003 .rpc_argp = &args, 5004 .rpc_resp = &res, 5005 }; 5006 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 5007 int ret = -ENOMEM, i; 5008 5009 /* As long as we're doing a round trip to the server anyway, 5010 * let's be prepared for a page of acl data. */ 5011 if (npages == 0) 5012 npages = 1; 5013 if (npages > ARRAY_SIZE(pages)) 5014 return -ERANGE; 5015 5016 for (i = 0; i < npages; i++) { 5017 pages[i] = alloc_page(GFP_KERNEL); 5018 if (!pages[i]) 5019 goto out_free; 5020 } 5021 5022 /* for decoding across pages */ 5023 res.acl_scratch = alloc_page(GFP_KERNEL); 5024 if (!res.acl_scratch) 5025 goto out_free; 5026 5027 args.acl_len = npages * PAGE_SIZE; 5028 5029 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n", 5030 __func__, buf, buflen, npages, args.acl_len); 5031 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), 5032 &msg, &args.seq_args, &res.seq_res, 0); 5033 if (ret) 5034 goto out_free; 5035 5036 /* Handle the case where the passed-in buffer is too short */ 5037 if (res.acl_flags & NFS4_ACL_TRUNC) { 5038 /* Did the user only issue a request for the acl length? */ 5039 if (buf == NULL) 5040 goto out_ok; 5041 ret = -ERANGE; 5042 goto out_free; 5043 } 5044 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len); 5045 if (buf) { 5046 if (res.acl_len > buflen) { 5047 ret = -ERANGE; 5048 goto out_free; 5049 } 5050 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len); 5051 } 5052 out_ok: 5053 ret = res.acl_len; 5054 out_free: 5055 for (i = 0; i < npages; i++) 5056 if (pages[i]) 5057 __free_page(pages[i]); 5058 if (res.acl_scratch) 5059 __free_page(res.acl_scratch); 5060 return ret; 5061 } 5062 5063 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen) 5064 { 5065 struct nfs4_exception exception = { }; 5066 ssize_t ret; 5067 do { 5068 ret = __nfs4_get_acl_uncached(inode, buf, buflen); 5069 trace_nfs4_get_acl(inode, ret); 5070 if (ret >= 0) 5071 break; 5072 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception); 5073 } while (exception.retry); 5074 return ret; 5075 } 5076 5077 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen) 5078 { 5079 struct nfs_server *server = NFS_SERVER(inode); 5080 int ret; 5081 5082 if (!nfs4_server_supports_acls(server)) 5083 return -EOPNOTSUPP; 5084 ret = nfs_revalidate_inode(server, inode); 5085 if (ret < 0) 5086 return ret; 5087 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL) 5088 nfs_zap_acl_cache(inode); 5089 ret = nfs4_read_cached_acl(inode, buf, buflen); 5090 if (ret != -ENOENT) 5091 /* -ENOENT is returned if there is no ACL or if there is an ACL 5092 * but no cached acl data, just the acl length */ 5093 return ret; 5094 return nfs4_get_acl_uncached(inode, buf, buflen); 5095 } 5096 5097 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5098 { 5099 struct nfs_server *server = NFS_SERVER(inode); 5100 struct page *pages[NFS4ACL_MAXPAGES]; 5101 struct nfs_setaclargs arg = { 5102 .fh = NFS_FH(inode), 5103 .acl_pages = pages, 5104 .acl_len = buflen, 5105 }; 5106 struct nfs_setaclres res; 5107 struct rpc_message msg = { 5108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL], 5109 .rpc_argp = &arg, 5110 .rpc_resp = &res, 5111 }; 5112 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE); 5113 int ret, i; 5114 5115 if (!nfs4_server_supports_acls(server)) 5116 return -EOPNOTSUPP; 5117 if (npages > ARRAY_SIZE(pages)) 5118 return -ERANGE; 5119 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages); 5120 if (i < 0) 5121 return i; 5122 nfs4_inode_return_delegation(inode); 5123 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5124 5125 /* 5126 * Free each page after tx, so the only ref left is 5127 * held by the network stack 5128 */ 5129 for (; i > 0; i--) 5130 put_page(pages[i-1]); 5131 5132 /* 5133 * Acl update can result in inode attribute update. 5134 * so mark the attribute cache invalid. 5135 */ 5136 spin_lock(&inode->i_lock); 5137 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; 5138 spin_unlock(&inode->i_lock); 5139 nfs_access_zap_cache(inode); 5140 nfs_zap_acl_cache(inode); 5141 return ret; 5142 } 5143 5144 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen) 5145 { 5146 struct nfs4_exception exception = { }; 5147 int err; 5148 do { 5149 err = __nfs4_proc_set_acl(inode, buf, buflen); 5150 trace_nfs4_set_acl(inode, err); 5151 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5152 &exception); 5153 } while (exception.retry); 5154 return err; 5155 } 5156 5157 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 5158 static int _nfs4_get_security_label(struct inode *inode, void *buf, 5159 size_t buflen) 5160 { 5161 struct nfs_server *server = NFS_SERVER(inode); 5162 struct nfs_fattr fattr; 5163 struct nfs4_label label = {0, 0, buflen, buf}; 5164 5165 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5166 struct nfs4_getattr_arg arg = { 5167 .fh = NFS_FH(inode), 5168 .bitmask = bitmask, 5169 }; 5170 struct nfs4_getattr_res res = { 5171 .fattr = &fattr, 5172 .label = &label, 5173 .server = server, 5174 }; 5175 struct rpc_message msg = { 5176 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], 5177 .rpc_argp = &arg, 5178 .rpc_resp = &res, 5179 }; 5180 int ret; 5181 5182 nfs_fattr_init(&fattr); 5183 5184 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0); 5185 if (ret) 5186 return ret; 5187 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) 5188 return -ENOENT; 5189 if (buflen < label.len) 5190 return -ERANGE; 5191 return 0; 5192 } 5193 5194 static int nfs4_get_security_label(struct inode *inode, void *buf, 5195 size_t buflen) 5196 { 5197 struct nfs4_exception exception = { }; 5198 int err; 5199 5200 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 5201 return -EOPNOTSUPP; 5202 5203 do { 5204 err = _nfs4_get_security_label(inode, buf, buflen); 5205 trace_nfs4_get_security_label(inode, err); 5206 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5207 &exception); 5208 } while (exception.retry); 5209 return err; 5210 } 5211 5212 static int _nfs4_do_set_security_label(struct inode *inode, 5213 struct nfs4_label *ilabel, 5214 struct nfs_fattr *fattr, 5215 struct nfs4_label *olabel) 5216 { 5217 5218 struct iattr sattr = {0}; 5219 struct nfs_server *server = NFS_SERVER(inode); 5220 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; 5221 struct nfs_setattrargs arg = { 5222 .fh = NFS_FH(inode), 5223 .iap = &sattr, 5224 .server = server, 5225 .bitmask = bitmask, 5226 .label = ilabel, 5227 }; 5228 struct nfs_setattrres res = { 5229 .fattr = fattr, 5230 .label = olabel, 5231 .server = server, 5232 }; 5233 struct rpc_message msg = { 5234 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], 5235 .rpc_argp = &arg, 5236 .rpc_resp = &res, 5237 }; 5238 int status; 5239 5240 nfs4_stateid_copy(&arg.stateid, &zero_stateid); 5241 5242 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5243 if (status) 5244 dprintk("%s failed: %d\n", __func__, status); 5245 5246 return status; 5247 } 5248 5249 static int nfs4_do_set_security_label(struct inode *inode, 5250 struct nfs4_label *ilabel, 5251 struct nfs_fattr *fattr, 5252 struct nfs4_label *olabel) 5253 { 5254 struct nfs4_exception exception = { }; 5255 int err; 5256 5257 do { 5258 err = _nfs4_do_set_security_label(inode, ilabel, 5259 fattr, olabel); 5260 trace_nfs4_set_security_label(inode, err); 5261 err = nfs4_handle_exception(NFS_SERVER(inode), err, 5262 &exception); 5263 } while (exception.retry); 5264 return err; 5265 } 5266 5267 static int 5268 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen) 5269 { 5270 struct nfs4_label ilabel, *olabel = NULL; 5271 struct nfs_fattr fattr; 5272 struct rpc_cred *cred; 5273 int status; 5274 5275 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) 5276 return -EOPNOTSUPP; 5277 5278 nfs_fattr_init(&fattr); 5279 5280 ilabel.pi = 0; 5281 ilabel.lfs = 0; 5282 ilabel.label = (char *)buf; 5283 ilabel.len = buflen; 5284 5285 cred = rpc_lookup_cred(); 5286 if (IS_ERR(cred)) 5287 return PTR_ERR(cred); 5288 5289 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); 5290 if (IS_ERR(olabel)) { 5291 status = -PTR_ERR(olabel); 5292 goto out; 5293 } 5294 5295 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); 5296 if (status == 0) 5297 nfs_setsecurity(inode, &fattr, olabel); 5298 5299 nfs4_label_free(olabel); 5300 out: 5301 put_rpccred(cred); 5302 return status; 5303 } 5304 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */ 5305 5306 5307 static void nfs4_init_boot_verifier(const struct nfs_client *clp, 5308 nfs4_verifier *bootverf) 5309 { 5310 __be32 verf[2]; 5311 5312 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) { 5313 /* An impossible timestamp guarantees this value 5314 * will never match a generated boot time. */ 5315 verf[0] = cpu_to_be32(U32_MAX); 5316 verf[1] = cpu_to_be32(U32_MAX); 5317 } else { 5318 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id); 5319 u64 ns = ktime_to_ns(nn->boot_time); 5320 5321 verf[0] = cpu_to_be32(ns >> 32); 5322 verf[1] = cpu_to_be32(ns); 5323 } 5324 memcpy(bootverf->data, verf, sizeof(bootverf->data)); 5325 } 5326 5327 static int 5328 nfs4_init_nonuniform_client_string(struct nfs_client *clp) 5329 { 5330 size_t len; 5331 char *str; 5332 5333 if (clp->cl_owner_id != NULL) 5334 return 0; 5335 5336 rcu_read_lock(); 5337 len = 14 + strlen(clp->cl_ipaddr) + 1 + 5338 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) + 5339 1 + 5340 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) + 5341 1; 5342 rcu_read_unlock(); 5343 5344 if (len > NFS4_OPAQUE_LIMIT + 1) 5345 return -EINVAL; 5346 5347 /* 5348 * Since this string is allocated at mount time, and held until the 5349 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5350 * about a memory-reclaim deadlock. 5351 */ 5352 str = kmalloc(len, GFP_KERNEL); 5353 if (!str) 5354 return -ENOMEM; 5355 5356 rcu_read_lock(); 5357 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s", 5358 clp->cl_ipaddr, 5359 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR), 5360 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)); 5361 rcu_read_unlock(); 5362 5363 clp->cl_owner_id = str; 5364 return 0; 5365 } 5366 5367 static int 5368 nfs4_init_uniquifier_client_string(struct nfs_client *clp) 5369 { 5370 size_t len; 5371 char *str; 5372 5373 len = 10 + 10 + 1 + 10 + 1 + 5374 strlen(nfs4_client_id_uniquifier) + 1 + 5375 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5376 5377 if (len > NFS4_OPAQUE_LIMIT + 1) 5378 return -EINVAL; 5379 5380 /* 5381 * Since this string is allocated at mount time, and held until the 5382 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5383 * about a memory-reclaim deadlock. 5384 */ 5385 str = kmalloc(len, GFP_KERNEL); 5386 if (!str) 5387 return -ENOMEM; 5388 5389 scnprintf(str, len, "Linux NFSv%u.%u %s/%s", 5390 clp->rpc_ops->version, clp->cl_minorversion, 5391 nfs4_client_id_uniquifier, 5392 clp->cl_rpcclient->cl_nodename); 5393 clp->cl_owner_id = str; 5394 return 0; 5395 } 5396 5397 static int 5398 nfs4_init_uniform_client_string(struct nfs_client *clp) 5399 { 5400 size_t len; 5401 char *str; 5402 5403 if (clp->cl_owner_id != NULL) 5404 return 0; 5405 5406 if (nfs4_client_id_uniquifier[0] != '\0') 5407 return nfs4_init_uniquifier_client_string(clp); 5408 5409 len = 10 + 10 + 1 + 10 + 1 + 5410 strlen(clp->cl_rpcclient->cl_nodename) + 1; 5411 5412 if (len > NFS4_OPAQUE_LIMIT + 1) 5413 return -EINVAL; 5414 5415 /* 5416 * Since this string is allocated at mount time, and held until the 5417 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying 5418 * about a memory-reclaim deadlock. 5419 */ 5420 str = kmalloc(len, GFP_KERNEL); 5421 if (!str) 5422 return -ENOMEM; 5423 5424 scnprintf(str, len, "Linux NFSv%u.%u %s", 5425 clp->rpc_ops->version, clp->cl_minorversion, 5426 clp->cl_rpcclient->cl_nodename); 5427 clp->cl_owner_id = str; 5428 return 0; 5429 } 5430 5431 /* 5432 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback 5433 * services. Advertise one based on the address family of the 5434 * clientaddr. 5435 */ 5436 static unsigned int 5437 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len) 5438 { 5439 if (strchr(clp->cl_ipaddr, ':') != NULL) 5440 return scnprintf(buf, len, "tcp6"); 5441 else 5442 return scnprintf(buf, len, "tcp"); 5443 } 5444 5445 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata) 5446 { 5447 struct nfs4_setclientid *sc = calldata; 5448 5449 if (task->tk_status == 0) 5450 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred); 5451 } 5452 5453 static const struct rpc_call_ops nfs4_setclientid_ops = { 5454 .rpc_call_done = nfs4_setclientid_done, 5455 }; 5456 5457 /** 5458 * nfs4_proc_setclientid - Negotiate client ID 5459 * @clp: state data structure 5460 * @program: RPC program for NFSv4 callback service 5461 * @port: IP port number for NFS4 callback service 5462 * @cred: RPC credential to use for this call 5463 * @res: where to place the result 5464 * 5465 * Returns zero, a negative errno, or a negative NFS4ERR status code. 5466 */ 5467 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, 5468 unsigned short port, struct rpc_cred *cred, 5469 struct nfs4_setclientid_res *res) 5470 { 5471 nfs4_verifier sc_verifier; 5472 struct nfs4_setclientid setclientid = { 5473 .sc_verifier = &sc_verifier, 5474 .sc_prog = program, 5475 .sc_clnt = clp, 5476 }; 5477 struct rpc_message msg = { 5478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID], 5479 .rpc_argp = &setclientid, 5480 .rpc_resp = res, 5481 .rpc_cred = cred, 5482 }; 5483 struct rpc_task *task; 5484 struct rpc_task_setup task_setup_data = { 5485 .rpc_client = clp->cl_rpcclient, 5486 .rpc_message = &msg, 5487 .callback_ops = &nfs4_setclientid_ops, 5488 .callback_data = &setclientid, 5489 .flags = RPC_TASK_TIMEOUT, 5490 }; 5491 int status; 5492 5493 /* nfs_client_id4 */ 5494 nfs4_init_boot_verifier(clp, &sc_verifier); 5495 5496 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags)) 5497 status = nfs4_init_uniform_client_string(clp); 5498 else 5499 status = nfs4_init_nonuniform_client_string(clp); 5500 5501 if (status) 5502 goto out; 5503 5504 /* cb_client4 */ 5505 setclientid.sc_netid_len = 5506 nfs4_init_callback_netid(clp, 5507 setclientid.sc_netid, 5508 sizeof(setclientid.sc_netid)); 5509 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr, 5510 sizeof(setclientid.sc_uaddr), "%s.%u.%u", 5511 clp->cl_ipaddr, port >> 8, port & 255); 5512 5513 dprintk("NFS call setclientid auth=%s, '%s'\n", 5514 clp->cl_rpcclient->cl_auth->au_ops->au_name, 5515 clp->cl_owner_id); 5516 task = rpc_run_task(&task_setup_data); 5517 if (IS_ERR(task)) { 5518 status = PTR_ERR(task); 5519 goto out; 5520 } 5521 status = task->tk_status; 5522 if (setclientid.sc_cred) { 5523 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred); 5524 put_rpccred(setclientid.sc_cred); 5525 } 5526 rpc_put_task(task); 5527 out: 5528 trace_nfs4_setclientid(clp, status); 5529 dprintk("NFS reply setclientid: %d\n", status); 5530 return status; 5531 } 5532 5533 /** 5534 * nfs4_proc_setclientid_confirm - Confirm client ID 5535 * @clp: state data structure 5536 * @res: result of a previous SETCLIENTID 5537 * @cred: RPC credential to use for this call 5538 * 5539 * Returns zero, a negative errno, or a negative NFS4ERR status code. 5540 */ 5541 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, 5542 struct nfs4_setclientid_res *arg, 5543 struct rpc_cred *cred) 5544 { 5545 struct rpc_message msg = { 5546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM], 5547 .rpc_argp = arg, 5548 .rpc_cred = cred, 5549 }; 5550 int status; 5551 5552 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n", 5553 clp->cl_rpcclient->cl_auth->au_ops->au_name, 5554 clp->cl_clientid); 5555 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 5556 trace_nfs4_setclientid_confirm(clp, status); 5557 dprintk("NFS reply setclientid_confirm: %d\n", status); 5558 return status; 5559 } 5560 5561 struct nfs4_delegreturndata { 5562 struct nfs4_delegreturnargs args; 5563 struct nfs4_delegreturnres res; 5564 struct nfs_fh fh; 5565 nfs4_stateid stateid; 5566 unsigned long timestamp; 5567 struct nfs_fattr fattr; 5568 int rpc_status; 5569 struct inode *inode; 5570 bool roc; 5571 u32 roc_barrier; 5572 }; 5573 5574 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata) 5575 { 5576 struct nfs4_delegreturndata *data = calldata; 5577 5578 if (!nfs4_sequence_done(task, &data->res.seq_res)) 5579 return; 5580 5581 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status); 5582 switch (task->tk_status) { 5583 case 0: 5584 renew_lease(data->res.server, data->timestamp); 5585 break; 5586 case -NFS4ERR_ADMIN_REVOKED: 5587 case -NFS4ERR_DELEG_REVOKED: 5588 case -NFS4ERR_EXPIRED: 5589 nfs4_free_revoked_stateid(data->res.server, 5590 data->args.stateid, 5591 task->tk_msg.rpc_cred); 5592 case -NFS4ERR_BAD_STATEID: 5593 case -NFS4ERR_OLD_STATEID: 5594 case -NFS4ERR_STALE_STATEID: 5595 task->tk_status = 0; 5596 break; 5597 default: 5598 if (nfs4_async_handle_error(task, data->res.server, 5599 NULL, NULL) == -EAGAIN) { 5600 rpc_restart_call_prepare(task); 5601 return; 5602 } 5603 } 5604 data->rpc_status = task->tk_status; 5605 if (data->roc && data->rpc_status == 0) 5606 pnfs_roc_set_barrier(data->inode, data->roc_barrier); 5607 } 5608 5609 static void nfs4_delegreturn_release(void *calldata) 5610 { 5611 struct nfs4_delegreturndata *data = calldata; 5612 struct inode *inode = data->inode; 5613 5614 if (inode) { 5615 if (data->roc) 5616 pnfs_roc_release(inode); 5617 nfs_iput_and_deactive(inode); 5618 } 5619 kfree(calldata); 5620 } 5621 5622 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data) 5623 { 5624 struct nfs4_delegreturndata *d_data; 5625 5626 d_data = (struct nfs4_delegreturndata *)data; 5627 5628 if (nfs4_wait_on_layoutreturn(d_data->inode, task)) 5629 return; 5630 5631 if (d_data->roc) 5632 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier); 5633 5634 nfs4_setup_sequence(d_data->res.server, 5635 &d_data->args.seq_args, 5636 &d_data->res.seq_res, 5637 task); 5638 } 5639 5640 static const struct rpc_call_ops nfs4_delegreturn_ops = { 5641 .rpc_call_prepare = nfs4_delegreturn_prepare, 5642 .rpc_call_done = nfs4_delegreturn_done, 5643 .rpc_release = nfs4_delegreturn_release, 5644 }; 5645 5646 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 5647 { 5648 struct nfs4_delegreturndata *data; 5649 struct nfs_server *server = NFS_SERVER(inode); 5650 struct rpc_task *task; 5651 struct rpc_message msg = { 5652 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN], 5653 .rpc_cred = cred, 5654 }; 5655 struct rpc_task_setup task_setup_data = { 5656 .rpc_client = server->client, 5657 .rpc_message = &msg, 5658 .callback_ops = &nfs4_delegreturn_ops, 5659 .flags = RPC_TASK_ASYNC, 5660 }; 5661 int status = 0; 5662 5663 data = kzalloc(sizeof(*data), GFP_NOFS); 5664 if (data == NULL) 5665 return -ENOMEM; 5666 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 5667 5668 nfs4_state_protect(server->nfs_client, 5669 NFS_SP4_MACH_CRED_CLEANUP, 5670 &task_setup_data.rpc_client, &msg); 5671 5672 data->args.fhandle = &data->fh; 5673 data->args.stateid = &data->stateid; 5674 data->args.bitmask = server->cache_consistency_bitmask; 5675 nfs_copy_fh(&data->fh, NFS_FH(inode)); 5676 nfs4_stateid_copy(&data->stateid, stateid); 5677 data->res.fattr = &data->fattr; 5678 data->res.server = server; 5679 nfs_fattr_init(data->res.fattr); 5680 data->timestamp = jiffies; 5681 data->rpc_status = 0; 5682 data->inode = nfs_igrab_and_active(inode); 5683 if (data->inode) 5684 data->roc = nfs4_roc(inode); 5685 5686 task_setup_data.callback_data = data; 5687 msg.rpc_argp = &data->args; 5688 msg.rpc_resp = &data->res; 5689 task = rpc_run_task(&task_setup_data); 5690 if (IS_ERR(task)) 5691 return PTR_ERR(task); 5692 if (!issync) 5693 goto out; 5694 status = nfs4_wait_for_completion_rpc_task(task); 5695 if (status != 0) 5696 goto out; 5697 status = data->rpc_status; 5698 if (status == 0) 5699 nfs_post_op_update_inode_force_wcc(inode, &data->fattr); 5700 else 5701 nfs_refresh_inode(inode, &data->fattr); 5702 out: 5703 rpc_put_task(task); 5704 return status; 5705 } 5706 5707 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync) 5708 { 5709 struct nfs_server *server = NFS_SERVER(inode); 5710 struct nfs4_exception exception = { }; 5711 int err; 5712 do { 5713 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync); 5714 trace_nfs4_delegreturn(inode, stateid, err); 5715 switch (err) { 5716 case -NFS4ERR_STALE_STATEID: 5717 case -NFS4ERR_EXPIRED: 5718 case 0: 5719 return 0; 5720 } 5721 err = nfs4_handle_exception(server, err, &exception); 5722 } while (exception.retry); 5723 return err; 5724 } 5725 5726 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5727 { 5728 struct inode *inode = state->inode; 5729 struct nfs_server *server = NFS_SERVER(inode); 5730 struct nfs_client *clp = server->nfs_client; 5731 struct nfs_lockt_args arg = { 5732 .fh = NFS_FH(inode), 5733 .fl = request, 5734 }; 5735 struct nfs_lockt_res res = { 5736 .denied = request, 5737 }; 5738 struct rpc_message msg = { 5739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT], 5740 .rpc_argp = &arg, 5741 .rpc_resp = &res, 5742 .rpc_cred = state->owner->so_cred, 5743 }; 5744 struct nfs4_lock_state *lsp; 5745 int status; 5746 5747 arg.lock_owner.clientid = clp->cl_clientid; 5748 status = nfs4_set_lock_state(state, request); 5749 if (status != 0) 5750 goto out; 5751 lsp = request->fl_u.nfs4_fl.owner; 5752 arg.lock_owner.id = lsp->ls_seqid.owner_id; 5753 arg.lock_owner.s_dev = server->s_dev; 5754 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); 5755 switch (status) { 5756 case 0: 5757 request->fl_type = F_UNLCK; 5758 break; 5759 case -NFS4ERR_DENIED: 5760 status = 0; 5761 } 5762 request->fl_ops->fl_release_private(request); 5763 request->fl_ops = NULL; 5764 out: 5765 return status; 5766 } 5767 5768 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request) 5769 { 5770 struct nfs4_exception exception = { }; 5771 int err; 5772 5773 do { 5774 err = _nfs4_proc_getlk(state, cmd, request); 5775 trace_nfs4_get_lock(request, state, cmd, err); 5776 err = nfs4_handle_exception(NFS_SERVER(state->inode), err, 5777 &exception); 5778 } while (exception.retry); 5779 return err; 5780 } 5781 5782 struct nfs4_unlockdata { 5783 struct nfs_locku_args arg; 5784 struct nfs_locku_res res; 5785 struct nfs4_lock_state *lsp; 5786 struct nfs_open_context *ctx; 5787 struct file_lock fl; 5788 struct nfs_server *server; 5789 unsigned long timestamp; 5790 }; 5791 5792 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl, 5793 struct nfs_open_context *ctx, 5794 struct nfs4_lock_state *lsp, 5795 struct nfs_seqid *seqid) 5796 { 5797 struct nfs4_unlockdata *p; 5798 struct inode *inode = lsp->ls_state->inode; 5799 5800 p = kzalloc(sizeof(*p), GFP_NOFS); 5801 if (p == NULL) 5802 return NULL; 5803 p->arg.fh = NFS_FH(inode); 5804 p->arg.fl = &p->fl; 5805 p->arg.seqid = seqid; 5806 p->res.seqid = seqid; 5807 p->lsp = lsp; 5808 atomic_inc(&lsp->ls_count); 5809 /* Ensure we don't close file until we're done freeing locks! */ 5810 p->ctx = get_nfs_open_context(ctx); 5811 memcpy(&p->fl, fl, sizeof(p->fl)); 5812 p->server = NFS_SERVER(inode); 5813 return p; 5814 } 5815 5816 static void nfs4_locku_release_calldata(void *data) 5817 { 5818 struct nfs4_unlockdata *calldata = data; 5819 nfs_free_seqid(calldata->arg.seqid); 5820 nfs4_put_lock_state(calldata->lsp); 5821 put_nfs_open_context(calldata->ctx); 5822 kfree(calldata); 5823 } 5824 5825 static void nfs4_locku_done(struct rpc_task *task, void *data) 5826 { 5827 struct nfs4_unlockdata *calldata = data; 5828 5829 if (!nfs4_sequence_done(task, &calldata->res.seq_res)) 5830 return; 5831 switch (task->tk_status) { 5832 case 0: 5833 renew_lease(calldata->server, calldata->timestamp); 5834 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl); 5835 if (nfs4_update_lock_stateid(calldata->lsp, 5836 &calldata->res.stateid)) 5837 break; 5838 case -NFS4ERR_ADMIN_REVOKED: 5839 case -NFS4ERR_EXPIRED: 5840 nfs4_free_revoked_stateid(calldata->server, 5841 &calldata->arg.stateid, 5842 task->tk_msg.rpc_cred); 5843 case -NFS4ERR_BAD_STATEID: 5844 case -NFS4ERR_OLD_STATEID: 5845 case -NFS4ERR_STALE_STATEID: 5846 if (!nfs4_stateid_match(&calldata->arg.stateid, 5847 &calldata->lsp->ls_stateid)) 5848 rpc_restart_call_prepare(task); 5849 break; 5850 default: 5851 if (nfs4_async_handle_error(task, calldata->server, 5852 NULL, NULL) == -EAGAIN) 5853 rpc_restart_call_prepare(task); 5854 } 5855 nfs_release_seqid(calldata->arg.seqid); 5856 } 5857 5858 static void nfs4_locku_prepare(struct rpc_task *task, void *data) 5859 { 5860 struct nfs4_unlockdata *calldata = data; 5861 5862 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0) 5863 goto out_wait; 5864 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid); 5865 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) { 5866 /* Note: exit _without_ running nfs4_locku_done */ 5867 goto out_no_action; 5868 } 5869 calldata->timestamp = jiffies; 5870 if (nfs4_setup_sequence(calldata->server, 5871 &calldata->arg.seq_args, 5872 &calldata->res.seq_res, 5873 task) != 0) 5874 nfs_release_seqid(calldata->arg.seqid); 5875 return; 5876 out_no_action: 5877 task->tk_action = NULL; 5878 out_wait: 5879 nfs4_sequence_done(task, &calldata->res.seq_res); 5880 } 5881 5882 static const struct rpc_call_ops nfs4_locku_ops = { 5883 .rpc_call_prepare = nfs4_locku_prepare, 5884 .rpc_call_done = nfs4_locku_done, 5885 .rpc_release = nfs4_locku_release_calldata, 5886 }; 5887 5888 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl, 5889 struct nfs_open_context *ctx, 5890 struct nfs4_lock_state *lsp, 5891 struct nfs_seqid *seqid) 5892 { 5893 struct nfs4_unlockdata *data; 5894 struct rpc_message msg = { 5895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU], 5896 .rpc_cred = ctx->cred, 5897 }; 5898 struct rpc_task_setup task_setup_data = { 5899 .rpc_client = NFS_CLIENT(lsp->ls_state->inode), 5900 .rpc_message = &msg, 5901 .callback_ops = &nfs4_locku_ops, 5902 .workqueue = nfsiod_workqueue, 5903 .flags = RPC_TASK_ASYNC, 5904 }; 5905 5906 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client, 5907 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg); 5908 5909 /* Ensure this is an unlock - when canceling a lock, the 5910 * canceled lock is passed in, and it won't be an unlock. 5911 */ 5912 fl->fl_type = F_UNLCK; 5913 5914 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid); 5915 if (data == NULL) { 5916 nfs_free_seqid(seqid); 5917 return ERR_PTR(-ENOMEM); 5918 } 5919 5920 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); 5921 msg.rpc_argp = &data->arg; 5922 msg.rpc_resp = &data->res; 5923 task_setup_data.callback_data = data; 5924 return rpc_run_task(&task_setup_data); 5925 } 5926 5927 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request) 5928 { 5929 struct inode *inode = state->inode; 5930 struct nfs4_state_owner *sp = state->owner; 5931 struct nfs_inode *nfsi = NFS_I(inode); 5932 struct nfs_seqid *seqid; 5933 struct nfs4_lock_state *lsp; 5934 struct rpc_task *task; 5935 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 5936 int status = 0; 5937 unsigned char fl_flags = request->fl_flags; 5938 5939 status = nfs4_set_lock_state(state, request); 5940 /* Unlock _before_ we do the RPC call */ 5941 request->fl_flags |= FL_EXISTS; 5942 /* Exclude nfs_delegation_claim_locks() */ 5943 mutex_lock(&sp->so_delegreturn_mutex); 5944 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */ 5945 down_read(&nfsi->rwsem); 5946 if (locks_lock_inode_wait(inode, request) == -ENOENT) { 5947 up_read(&nfsi->rwsem); 5948 mutex_unlock(&sp->so_delegreturn_mutex); 5949 goto out; 5950 } 5951 up_read(&nfsi->rwsem); 5952 mutex_unlock(&sp->so_delegreturn_mutex); 5953 if (status != 0) 5954 goto out; 5955 /* Is this a delegated lock? */ 5956 lsp = request->fl_u.nfs4_fl.owner; 5957 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0) 5958 goto out; 5959 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid; 5960 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL); 5961 status = -ENOMEM; 5962 if (IS_ERR(seqid)) 5963 goto out; 5964 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid); 5965 status = PTR_ERR(task); 5966 if (IS_ERR(task)) 5967 goto out; 5968 status = nfs4_wait_for_completion_rpc_task(task); 5969 rpc_put_task(task); 5970 out: 5971 request->fl_flags = fl_flags; 5972 trace_nfs4_unlock(request, state, F_SETLK, status); 5973 return status; 5974 } 5975 5976 struct nfs4_lockdata { 5977 struct nfs_lock_args arg; 5978 struct nfs_lock_res res; 5979 struct nfs4_lock_state *lsp; 5980 struct nfs_open_context *ctx; 5981 struct file_lock fl; 5982 unsigned long timestamp; 5983 int rpc_status; 5984 int cancelled; 5985 struct nfs_server *server; 5986 }; 5987 5988 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl, 5989 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp, 5990 gfp_t gfp_mask) 5991 { 5992 struct nfs4_lockdata *p; 5993 struct inode *inode = lsp->ls_state->inode; 5994 struct nfs_server *server = NFS_SERVER(inode); 5995 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); 5996 5997 p = kzalloc(sizeof(*p), gfp_mask); 5998 if (p == NULL) 5999 return NULL; 6000 6001 p->arg.fh = NFS_FH(inode); 6002 p->arg.fl = &p->fl; 6003 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask); 6004 if (IS_ERR(p->arg.open_seqid)) 6005 goto out_free; 6006 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid; 6007 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask); 6008 if (IS_ERR(p->arg.lock_seqid)) 6009 goto out_free_seqid; 6010 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid; 6011 p->arg.lock_owner.id = lsp->ls_seqid.owner_id; 6012 p->arg.lock_owner.s_dev = server->s_dev; 6013 p->res.lock_seqid = p->arg.lock_seqid; 6014 p->lsp = lsp; 6015 p->server = server; 6016 atomic_inc(&lsp->ls_count); 6017 p->ctx = get_nfs_open_context(ctx); 6018 get_file(fl->fl_file); 6019 memcpy(&p->fl, fl, sizeof(p->fl)); 6020 return p; 6021 out_free_seqid: 6022 nfs_free_seqid(p->arg.open_seqid); 6023 out_free: 6024 kfree(p); 6025 return NULL; 6026 } 6027 6028 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata) 6029 { 6030 struct nfs4_lockdata *data = calldata; 6031 struct nfs4_state *state = data->lsp->ls_state; 6032 6033 dprintk("%s: begin!\n", __func__); 6034 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0) 6035 goto out_wait; 6036 /* Do we need to do an open_to_lock_owner? */ 6037 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) { 6038 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) { 6039 goto out_release_lock_seqid; 6040 } 6041 nfs4_stateid_copy(&data->arg.open_stateid, 6042 &state->open_stateid); 6043 data->arg.new_lock_owner = 1; 6044 data->res.open_seqid = data->arg.open_seqid; 6045 } else { 6046 data->arg.new_lock_owner = 0; 6047 nfs4_stateid_copy(&data->arg.lock_stateid, 6048 &data->lsp->ls_stateid); 6049 } 6050 if (!nfs4_valid_open_stateid(state)) { 6051 data->rpc_status = -EBADF; 6052 task->tk_action = NULL; 6053 goto out_release_open_seqid; 6054 } 6055 data->timestamp = jiffies; 6056 if (nfs4_setup_sequence(data->server, 6057 &data->arg.seq_args, 6058 &data->res.seq_res, 6059 task) == 0) 6060 return; 6061 out_release_open_seqid: 6062 nfs_release_seqid(data->arg.open_seqid); 6063 out_release_lock_seqid: 6064 nfs_release_seqid(data->arg.lock_seqid); 6065 out_wait: 6066 nfs4_sequence_done(task, &data->res.seq_res); 6067 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status); 6068 } 6069 6070 static void nfs4_lock_done(struct rpc_task *task, void *calldata) 6071 { 6072 struct nfs4_lockdata *data = calldata; 6073 struct nfs4_lock_state *lsp = data->lsp; 6074 6075 dprintk("%s: begin!\n", __func__); 6076 6077 if (!nfs4_sequence_done(task, &data->res.seq_res)) 6078 return; 6079 6080 data->rpc_status = task->tk_status; 6081 switch (task->tk_status) { 6082 case 0: 6083 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)), 6084 data->timestamp); 6085 if (data->arg.new_lock) { 6086 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS); 6087 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) { 6088 rpc_restart_call_prepare(task); 6089 break; 6090 } 6091 } 6092 if (data->arg.new_lock_owner != 0) { 6093 nfs_confirm_seqid(&lsp->ls_seqid, 0); 6094 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid); 6095 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags); 6096 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid)) 6097 rpc_restart_call_prepare(task); 6098 break; 6099 case -NFS4ERR_BAD_STATEID: 6100 case -NFS4ERR_OLD_STATEID: 6101 case -NFS4ERR_STALE_STATEID: 6102 case -NFS4ERR_EXPIRED: 6103 if (data->arg.new_lock_owner != 0) { 6104 if (!nfs4_stateid_match(&data->arg.open_stateid, 6105 &lsp->ls_state->open_stateid)) 6106 rpc_restart_call_prepare(task); 6107 } else if (!nfs4_stateid_match(&data->arg.lock_stateid, 6108 &lsp->ls_stateid)) 6109 rpc_restart_call_prepare(task); 6110 } 6111 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status); 6112 } 6113 6114 static void nfs4_lock_release(void *calldata) 6115 { 6116 struct nfs4_lockdata *data = calldata; 6117 6118 dprintk("%s: begin!\n", __func__); 6119 nfs_free_seqid(data->arg.open_seqid); 6120 if (data->cancelled != 0) { 6121 struct rpc_task *task; 6122 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp, 6123 data->arg.lock_seqid); 6124 if (!IS_ERR(task)) 6125 rpc_put_task_async(task); 6126 dprintk("%s: cancelling lock!\n", __func__); 6127 } else 6128 nfs_free_seqid(data->arg.lock_seqid); 6129 nfs4_put_lock_state(data->lsp); 6130 put_nfs_open_context(data->ctx); 6131 fput(data->fl.fl_file); 6132 kfree(data); 6133 dprintk("%s: done!\n", __func__); 6134 } 6135 6136 static const struct rpc_call_ops nfs4_lock_ops = { 6137 .rpc_call_prepare = nfs4_lock_prepare, 6138 .rpc_call_done = nfs4_lock_done, 6139 .rpc_release = nfs4_lock_release, 6140 }; 6141 6142 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error) 6143 { 6144 switch (error) { 6145 case -NFS4ERR_ADMIN_REVOKED: 6146 case -NFS4ERR_EXPIRED: 6147 case -NFS4ERR_BAD_STATEID: 6148 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 6149 if (new_lock_owner != 0 || 6150 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0) 6151 nfs4_schedule_stateid_recovery(server, lsp->ls_state); 6152 break; 6153 case -NFS4ERR_STALE_STATEID: 6154 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED; 6155 nfs4_schedule_lease_recovery(server->nfs_client); 6156 }; 6157 } 6158 6159 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type) 6160 { 6161 struct nfs4_lockdata *data; 6162 struct rpc_task *task; 6163 struct rpc_message msg = { 6164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK], 6165 .rpc_cred = state->owner->so_cred, 6166 }; 6167 struct rpc_task_setup task_setup_data = { 6168 .rpc_client = NFS_CLIENT(state->inode), 6169 .rpc_message = &msg, 6170 .callback_ops = &nfs4_lock_ops, 6171 .workqueue = nfsiod_workqueue, 6172 .flags = RPC_TASK_ASYNC, 6173 }; 6174 int ret; 6175 6176 dprintk("%s: begin!\n", __func__); 6177 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file), 6178 fl->fl_u.nfs4_fl.owner, 6179 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS); 6180 if (data == NULL) 6181 return -ENOMEM; 6182 if (IS_SETLKW(cmd)) 6183 data->arg.block = 1; 6184 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1); 6185 msg.rpc_argp = &data->arg; 6186 msg.rpc_resp = &data->res; 6187 task_setup_data.callback_data = data; 6188 if (recovery_type > NFS_LOCK_NEW) { 6189 if (recovery_type == NFS_LOCK_RECLAIM) 6190 data->arg.reclaim = NFS_LOCK_RECLAIM; 6191 nfs4_set_sequence_privileged(&data->arg.seq_args); 6192 } else 6193 data->arg.new_lock = 1; 6194 task = rpc_run_task(&task_setup_data); 6195 if (IS_ERR(task)) 6196 return PTR_ERR(task); 6197 ret = nfs4_wait_for_completion_rpc_task(task); 6198 if (ret == 0) { 6199 ret = data->rpc_status; 6200 if (ret) 6201 nfs4_handle_setlk_error(data->server, data->lsp, 6202 data->arg.new_lock_owner, ret); 6203 } else 6204 data->cancelled = 1; 6205 rpc_put_task(task); 6206 dprintk("%s: done, ret = %d!\n", __func__, ret); 6207 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret); 6208 return ret; 6209 } 6210 6211 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request) 6212 { 6213 struct nfs_server *server = NFS_SERVER(state->inode); 6214 struct nfs4_exception exception = { 6215 .inode = state->inode, 6216 }; 6217 int err; 6218 6219 do { 6220 /* Cache the lock if possible... */ 6221 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 6222 return 0; 6223 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM); 6224 if (err != -NFS4ERR_DELAY) 6225 break; 6226 nfs4_handle_exception(server, err, &exception); 6227 } while (exception.retry); 6228 return err; 6229 } 6230 6231 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request) 6232 { 6233 struct nfs_server *server = NFS_SERVER(state->inode); 6234 struct nfs4_exception exception = { 6235 .inode = state->inode, 6236 }; 6237 int err; 6238 6239 err = nfs4_set_lock_state(state, request); 6240 if (err != 0) 6241 return err; 6242 if (!recover_lost_locks) { 6243 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags); 6244 return 0; 6245 } 6246 do { 6247 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0) 6248 return 0; 6249 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED); 6250 switch (err) { 6251 default: 6252 goto out; 6253 case -NFS4ERR_GRACE: 6254 case -NFS4ERR_DELAY: 6255 nfs4_handle_exception(server, err, &exception); 6256 err = 0; 6257 } 6258 } while (exception.retry); 6259 out: 6260 return err; 6261 } 6262 6263 #if defined(CONFIG_NFS_V4_1) 6264 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request) 6265 { 6266 struct nfs4_lock_state *lsp; 6267 int status; 6268 6269 status = nfs4_set_lock_state(state, request); 6270 if (status != 0) 6271 return status; 6272 lsp = request->fl_u.nfs4_fl.owner; 6273 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) || 6274 test_bit(NFS_LOCK_LOST, &lsp->ls_flags)) 6275 return 0; 6276 status = nfs4_lock_expired(state, request); 6277 return status; 6278 } 6279 #endif 6280 6281 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6282 { 6283 struct nfs_inode *nfsi = NFS_I(state->inode); 6284 struct nfs4_state_owner *sp = state->owner; 6285 unsigned char fl_flags = request->fl_flags; 6286 int status; 6287 6288 request->fl_flags |= FL_ACCESS; 6289 status = locks_lock_inode_wait(state->inode, request); 6290 if (status < 0) 6291 goto out; 6292 mutex_lock(&sp->so_delegreturn_mutex); 6293 down_read(&nfsi->rwsem); 6294 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) { 6295 /* Yes: cache locks! */ 6296 /* ...but avoid races with delegation recall... */ 6297 request->fl_flags = fl_flags & ~FL_SLEEP; 6298 status = locks_lock_inode_wait(state->inode, request); 6299 up_read(&nfsi->rwsem); 6300 mutex_unlock(&sp->so_delegreturn_mutex); 6301 goto out; 6302 } 6303 up_read(&nfsi->rwsem); 6304 mutex_unlock(&sp->so_delegreturn_mutex); 6305 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW); 6306 out: 6307 request->fl_flags = fl_flags; 6308 return status; 6309 } 6310 6311 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6312 { 6313 struct nfs4_exception exception = { 6314 .state = state, 6315 .inode = state->inode, 6316 }; 6317 int err; 6318 6319 do { 6320 err = _nfs4_proc_setlk(state, cmd, request); 6321 if (err == -NFS4ERR_DENIED) 6322 err = -EAGAIN; 6323 err = nfs4_handle_exception(NFS_SERVER(state->inode), 6324 err, &exception); 6325 } while (exception.retry); 6326 return err; 6327 } 6328 6329 #define NFS4_LOCK_MINTIMEOUT (1 * HZ) 6330 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ) 6331 6332 static int 6333 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd, 6334 struct file_lock *request) 6335 { 6336 int status = -ERESTARTSYS; 6337 unsigned long timeout = NFS4_LOCK_MINTIMEOUT; 6338 6339 while(!signalled()) { 6340 status = nfs4_proc_setlk(state, cmd, request); 6341 if ((status != -EAGAIN) || IS_SETLK(cmd)) 6342 break; 6343 freezable_schedule_timeout_interruptible(timeout); 6344 timeout *= 2; 6345 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout); 6346 status = -ERESTARTSYS; 6347 } 6348 return status; 6349 } 6350 6351 #ifdef CONFIG_NFS_V4_1 6352 struct nfs4_lock_waiter { 6353 struct task_struct *task; 6354 struct inode *inode; 6355 struct nfs_lowner *owner; 6356 bool notified; 6357 }; 6358 6359 static int 6360 nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key) 6361 { 6362 int ret; 6363 struct cb_notify_lock_args *cbnl = key; 6364 struct nfs4_lock_waiter *waiter = wait->private; 6365 struct nfs_lowner *lowner = &cbnl->cbnl_owner, 6366 *wowner = waiter->owner; 6367 6368 /* Only wake if the callback was for the same owner */ 6369 if (lowner->clientid != wowner->clientid || 6370 lowner->id != wowner->id || 6371 lowner->s_dev != wowner->s_dev) 6372 return 0; 6373 6374 /* Make sure it's for the right inode */ 6375 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh)) 6376 return 0; 6377 6378 waiter->notified = true; 6379 6380 /* override "private" so we can use default_wake_function */ 6381 wait->private = waiter->task; 6382 ret = autoremove_wake_function(wait, mode, flags, key); 6383 wait->private = waiter; 6384 return ret; 6385 } 6386 6387 static int 6388 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6389 { 6390 int status = -ERESTARTSYS; 6391 unsigned long flags; 6392 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner; 6393 struct nfs_server *server = NFS_SERVER(state->inode); 6394 struct nfs_client *clp = server->nfs_client; 6395 wait_queue_head_t *q = &clp->cl_lock_waitq; 6396 struct nfs_lowner owner = { .clientid = clp->cl_clientid, 6397 .id = lsp->ls_seqid.owner_id, 6398 .s_dev = server->s_dev }; 6399 struct nfs4_lock_waiter waiter = { .task = current, 6400 .inode = state->inode, 6401 .owner = &owner, 6402 .notified = false }; 6403 wait_queue_t wait; 6404 6405 /* Don't bother with waitqueue if we don't expect a callback */ 6406 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags)) 6407 return nfs4_retry_setlk_simple(state, cmd, request); 6408 6409 init_wait(&wait); 6410 wait.private = &waiter; 6411 wait.func = nfs4_wake_lock_waiter; 6412 add_wait_queue(q, &wait); 6413 6414 while(!signalled()) { 6415 status = nfs4_proc_setlk(state, cmd, request); 6416 if ((status != -EAGAIN) || IS_SETLK(cmd)) 6417 break; 6418 6419 status = -ERESTARTSYS; 6420 spin_lock_irqsave(&q->lock, flags); 6421 if (waiter.notified) { 6422 spin_unlock_irqrestore(&q->lock, flags); 6423 continue; 6424 } 6425 set_current_state(TASK_INTERRUPTIBLE); 6426 spin_unlock_irqrestore(&q->lock, flags); 6427 6428 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT); 6429 } 6430 6431 finish_wait(q, &wait); 6432 return status; 6433 } 6434 #else /* !CONFIG_NFS_V4_1 */ 6435 static inline int 6436 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request) 6437 { 6438 return nfs4_retry_setlk_simple(state, cmd, request); 6439 } 6440 #endif 6441 6442 static int 6443 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request) 6444 { 6445 struct nfs_open_context *ctx; 6446 struct nfs4_state *state; 6447 int status; 6448 6449 /* verify open state */ 6450 ctx = nfs_file_open_context(filp); 6451 state = ctx->state; 6452 6453 if (request->fl_start < 0 || request->fl_end < 0) 6454 return -EINVAL; 6455 6456 if (IS_GETLK(cmd)) { 6457 if (state != NULL) 6458 return nfs4_proc_getlk(state, F_GETLK, request); 6459 return 0; 6460 } 6461 6462 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd))) 6463 return -EINVAL; 6464 6465 if (request->fl_type == F_UNLCK) { 6466 if (state != NULL) 6467 return nfs4_proc_unlck(state, cmd, request); 6468 return 0; 6469 } 6470 6471 if (state == NULL) 6472 return -ENOLCK; 6473 6474 if ((request->fl_flags & FL_POSIX) && 6475 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags)) 6476 return -ENOLCK; 6477 6478 /* 6479 * Don't rely on the VFS having checked the file open mode, 6480 * since it won't do this for flock() locks. 6481 */ 6482 switch (request->fl_type) { 6483 case F_RDLCK: 6484 if (!(filp->f_mode & FMODE_READ)) 6485 return -EBADF; 6486 break; 6487 case F_WRLCK: 6488 if (!(filp->f_mode & FMODE_WRITE)) 6489 return -EBADF; 6490 } 6491 6492 status = nfs4_set_lock_state(state, request); 6493 if (status != 0) 6494 return status; 6495 6496 return nfs4_retry_setlk(state, cmd, request); 6497 } 6498 6499 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid) 6500 { 6501 struct nfs_server *server = NFS_SERVER(state->inode); 6502 int err; 6503 6504 err = nfs4_set_lock_state(state, fl); 6505 if (err != 0) 6506 return err; 6507 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW); 6508 return nfs4_handle_delegation_recall_error(server, state, stateid, err); 6509 } 6510 6511 struct nfs_release_lockowner_data { 6512 struct nfs4_lock_state *lsp; 6513 struct nfs_server *server; 6514 struct nfs_release_lockowner_args args; 6515 struct nfs_release_lockowner_res res; 6516 unsigned long timestamp; 6517 }; 6518 6519 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata) 6520 { 6521 struct nfs_release_lockowner_data *data = calldata; 6522 struct nfs_server *server = data->server; 6523 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl, 6524 &data->args.seq_args, &data->res.seq_res, task); 6525 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 6526 data->timestamp = jiffies; 6527 } 6528 6529 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata) 6530 { 6531 struct nfs_release_lockowner_data *data = calldata; 6532 struct nfs_server *server = data->server; 6533 6534 nfs40_sequence_done(task, &data->res.seq_res); 6535 6536 switch (task->tk_status) { 6537 case 0: 6538 renew_lease(server, data->timestamp); 6539 break; 6540 case -NFS4ERR_STALE_CLIENTID: 6541 case -NFS4ERR_EXPIRED: 6542 nfs4_schedule_lease_recovery(server->nfs_client); 6543 break; 6544 case -NFS4ERR_LEASE_MOVED: 6545 case -NFS4ERR_DELAY: 6546 if (nfs4_async_handle_error(task, server, 6547 NULL, NULL) == -EAGAIN) 6548 rpc_restart_call_prepare(task); 6549 } 6550 } 6551 6552 static void nfs4_release_lockowner_release(void *calldata) 6553 { 6554 struct nfs_release_lockowner_data *data = calldata; 6555 nfs4_free_lock_state(data->server, data->lsp); 6556 kfree(calldata); 6557 } 6558 6559 static const struct rpc_call_ops nfs4_release_lockowner_ops = { 6560 .rpc_call_prepare = nfs4_release_lockowner_prepare, 6561 .rpc_call_done = nfs4_release_lockowner_done, 6562 .rpc_release = nfs4_release_lockowner_release, 6563 }; 6564 6565 static void 6566 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp) 6567 { 6568 struct nfs_release_lockowner_data *data; 6569 struct rpc_message msg = { 6570 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER], 6571 }; 6572 6573 if (server->nfs_client->cl_mvops->minor_version != 0) 6574 return; 6575 6576 data = kmalloc(sizeof(*data), GFP_NOFS); 6577 if (!data) 6578 return; 6579 data->lsp = lsp; 6580 data->server = server; 6581 data->args.lock_owner.clientid = server->nfs_client->cl_clientid; 6582 data->args.lock_owner.id = lsp->ls_seqid.owner_id; 6583 data->args.lock_owner.s_dev = server->s_dev; 6584 6585 msg.rpc_argp = &data->args; 6586 msg.rpc_resp = &data->res; 6587 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0); 6588 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data); 6589 } 6590 6591 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl" 6592 6593 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler, 6594 struct dentry *unused, struct inode *inode, 6595 const char *key, const void *buf, 6596 size_t buflen, int flags) 6597 { 6598 return nfs4_proc_set_acl(inode, buf, buflen); 6599 } 6600 6601 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler, 6602 struct dentry *unused, struct inode *inode, 6603 const char *key, void *buf, size_t buflen) 6604 { 6605 return nfs4_proc_get_acl(inode, buf, buflen); 6606 } 6607 6608 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry) 6609 { 6610 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))); 6611 } 6612 6613 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 6614 6615 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler, 6616 struct dentry *unused, struct inode *inode, 6617 const char *key, const void *buf, 6618 size_t buflen, int flags) 6619 { 6620 if (security_ismaclabel(key)) 6621 return nfs4_set_security_label(inode, buf, buflen); 6622 6623 return -EOPNOTSUPP; 6624 } 6625 6626 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler, 6627 struct dentry *unused, struct inode *inode, 6628 const char *key, void *buf, size_t buflen) 6629 { 6630 if (security_ismaclabel(key)) 6631 return nfs4_get_security_label(inode, buf, buflen); 6632 return -EOPNOTSUPP; 6633 } 6634 6635 static ssize_t 6636 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 6637 { 6638 int len = 0; 6639 6640 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) { 6641 len = security_inode_listsecurity(inode, list, list_len); 6642 if (list_len && len > list_len) 6643 return -ERANGE; 6644 } 6645 return len; 6646 } 6647 6648 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = { 6649 .prefix = XATTR_SECURITY_PREFIX, 6650 .get = nfs4_xattr_get_nfs4_label, 6651 .set = nfs4_xattr_set_nfs4_label, 6652 }; 6653 6654 #else 6655 6656 static ssize_t 6657 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len) 6658 { 6659 return 0; 6660 } 6661 6662 #endif 6663 6664 /* 6665 * nfs_fhget will use either the mounted_on_fileid or the fileid 6666 */ 6667 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) 6668 { 6669 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) || 6670 (fattr->valid & NFS_ATTR_FATTR_FILEID)) && 6671 (fattr->valid & NFS_ATTR_FATTR_FSID) && 6672 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS))) 6673 return; 6674 6675 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE | 6676 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL; 6677 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO; 6678 fattr->nlink = 2; 6679 } 6680 6681 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 6682 const struct qstr *name, 6683 struct nfs4_fs_locations *fs_locations, 6684 struct page *page) 6685 { 6686 struct nfs_server *server = NFS_SERVER(dir); 6687 u32 bitmask[3] = { 6688 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6689 }; 6690 struct nfs4_fs_locations_arg args = { 6691 .dir_fh = NFS_FH(dir), 6692 .name = name, 6693 .page = page, 6694 .bitmask = bitmask, 6695 }; 6696 struct nfs4_fs_locations_res res = { 6697 .fs_locations = fs_locations, 6698 }; 6699 struct rpc_message msg = { 6700 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6701 .rpc_argp = &args, 6702 .rpc_resp = &res, 6703 }; 6704 int status; 6705 6706 dprintk("%s: start\n", __func__); 6707 6708 /* Ask for the fileid of the absent filesystem if mounted_on_fileid 6709 * is not supported */ 6710 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID) 6711 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID; 6712 else 6713 bitmask[0] |= FATTR4_WORD0_FILEID; 6714 6715 nfs_fattr_init(&fs_locations->fattr); 6716 fs_locations->server = server; 6717 fs_locations->nlocations = 0; 6718 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); 6719 dprintk("%s: returned status = %d\n", __func__, status); 6720 return status; 6721 } 6722 6723 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, 6724 const struct qstr *name, 6725 struct nfs4_fs_locations *fs_locations, 6726 struct page *page) 6727 { 6728 struct nfs4_exception exception = { }; 6729 int err; 6730 do { 6731 err = _nfs4_proc_fs_locations(client, dir, name, 6732 fs_locations, page); 6733 trace_nfs4_get_fs_locations(dir, name, err); 6734 err = nfs4_handle_exception(NFS_SERVER(dir), err, 6735 &exception); 6736 } while (exception.retry); 6737 return err; 6738 } 6739 6740 /* 6741 * This operation also signals the server that this client is 6742 * performing migration recovery. The server can stop returning 6743 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is 6744 * appended to this compound to identify the client ID which is 6745 * performing recovery. 6746 */ 6747 static int _nfs40_proc_get_locations(struct inode *inode, 6748 struct nfs4_fs_locations *locations, 6749 struct page *page, struct rpc_cred *cred) 6750 { 6751 struct nfs_server *server = NFS_SERVER(inode); 6752 struct rpc_clnt *clnt = server->client; 6753 u32 bitmask[2] = { 6754 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6755 }; 6756 struct nfs4_fs_locations_arg args = { 6757 .clientid = server->nfs_client->cl_clientid, 6758 .fh = NFS_FH(inode), 6759 .page = page, 6760 .bitmask = bitmask, 6761 .migration = 1, /* skip LOOKUP */ 6762 .renew = 1, /* append RENEW */ 6763 }; 6764 struct nfs4_fs_locations_res res = { 6765 .fs_locations = locations, 6766 .migration = 1, 6767 .renew = 1, 6768 }; 6769 struct rpc_message msg = { 6770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6771 .rpc_argp = &args, 6772 .rpc_resp = &res, 6773 .rpc_cred = cred, 6774 }; 6775 unsigned long now = jiffies; 6776 int status; 6777 6778 nfs_fattr_init(&locations->fattr); 6779 locations->server = server; 6780 locations->nlocations = 0; 6781 6782 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6783 nfs4_set_sequence_privileged(&args.seq_args); 6784 status = nfs4_call_sync_sequence(clnt, server, &msg, 6785 &args.seq_args, &res.seq_res); 6786 if (status) 6787 return status; 6788 6789 renew_lease(server, now); 6790 return 0; 6791 } 6792 6793 #ifdef CONFIG_NFS_V4_1 6794 6795 /* 6796 * This operation also signals the server that this client is 6797 * performing migration recovery. The server can stop asserting 6798 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID 6799 * performing this operation is identified in the SEQUENCE 6800 * operation in this compound. 6801 * 6802 * When the client supports GETATTR(fs_locations_info), it can 6803 * be plumbed in here. 6804 */ 6805 static int _nfs41_proc_get_locations(struct inode *inode, 6806 struct nfs4_fs_locations *locations, 6807 struct page *page, struct rpc_cred *cred) 6808 { 6809 struct nfs_server *server = NFS_SERVER(inode); 6810 struct rpc_clnt *clnt = server->client; 6811 u32 bitmask[2] = { 6812 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS, 6813 }; 6814 struct nfs4_fs_locations_arg args = { 6815 .fh = NFS_FH(inode), 6816 .page = page, 6817 .bitmask = bitmask, 6818 .migration = 1, /* skip LOOKUP */ 6819 }; 6820 struct nfs4_fs_locations_res res = { 6821 .fs_locations = locations, 6822 .migration = 1, 6823 }; 6824 struct rpc_message msg = { 6825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS], 6826 .rpc_argp = &args, 6827 .rpc_resp = &res, 6828 .rpc_cred = cred, 6829 }; 6830 int status; 6831 6832 nfs_fattr_init(&locations->fattr); 6833 locations->server = server; 6834 locations->nlocations = 0; 6835 6836 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6837 nfs4_set_sequence_privileged(&args.seq_args); 6838 status = nfs4_call_sync_sequence(clnt, server, &msg, 6839 &args.seq_args, &res.seq_res); 6840 if (status == NFS4_OK && 6841 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 6842 status = -NFS4ERR_LEASE_MOVED; 6843 return status; 6844 } 6845 6846 #endif /* CONFIG_NFS_V4_1 */ 6847 6848 /** 6849 * nfs4_proc_get_locations - discover locations for a migrated FSID 6850 * @inode: inode on FSID that is migrating 6851 * @locations: result of query 6852 * @page: buffer 6853 * @cred: credential to use for this operation 6854 * 6855 * Returns NFS4_OK on success, a negative NFS4ERR status code if the 6856 * operation failed, or a negative errno if a local error occurred. 6857 * 6858 * On success, "locations" is filled in, but if the server has 6859 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not 6860 * asserted. 6861 * 6862 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases 6863 * from this client that require migration recovery. 6864 */ 6865 int nfs4_proc_get_locations(struct inode *inode, 6866 struct nfs4_fs_locations *locations, 6867 struct page *page, struct rpc_cred *cred) 6868 { 6869 struct nfs_server *server = NFS_SERVER(inode); 6870 struct nfs_client *clp = server->nfs_client; 6871 const struct nfs4_mig_recovery_ops *ops = 6872 clp->cl_mvops->mig_recovery_ops; 6873 struct nfs4_exception exception = { }; 6874 int status; 6875 6876 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 6877 (unsigned long long)server->fsid.major, 6878 (unsigned long long)server->fsid.minor, 6879 clp->cl_hostname); 6880 nfs_display_fhandle(NFS_FH(inode), __func__); 6881 6882 do { 6883 status = ops->get_locations(inode, locations, page, cred); 6884 if (status != -NFS4ERR_DELAY) 6885 break; 6886 nfs4_handle_exception(server, status, &exception); 6887 } while (exception.retry); 6888 return status; 6889 } 6890 6891 /* 6892 * This operation also signals the server that this client is 6893 * performing "lease moved" recovery. The server can stop 6894 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation 6895 * is appended to this compound to identify the client ID which is 6896 * performing recovery. 6897 */ 6898 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6899 { 6900 struct nfs_server *server = NFS_SERVER(inode); 6901 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client; 6902 struct rpc_clnt *clnt = server->client; 6903 struct nfs4_fsid_present_arg args = { 6904 .fh = NFS_FH(inode), 6905 .clientid = clp->cl_clientid, 6906 .renew = 1, /* append RENEW */ 6907 }; 6908 struct nfs4_fsid_present_res res = { 6909 .renew = 1, 6910 }; 6911 struct rpc_message msg = { 6912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 6913 .rpc_argp = &args, 6914 .rpc_resp = &res, 6915 .rpc_cred = cred, 6916 }; 6917 unsigned long now = jiffies; 6918 int status; 6919 6920 res.fh = nfs_alloc_fhandle(); 6921 if (res.fh == NULL) 6922 return -ENOMEM; 6923 6924 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6925 nfs4_set_sequence_privileged(&args.seq_args); 6926 status = nfs4_call_sync_sequence(clnt, server, &msg, 6927 &args.seq_args, &res.seq_res); 6928 nfs_free_fhandle(res.fh); 6929 if (status) 6930 return status; 6931 6932 do_renew_lease(clp, now); 6933 return 0; 6934 } 6935 6936 #ifdef CONFIG_NFS_V4_1 6937 6938 /* 6939 * This operation also signals the server that this client is 6940 * performing "lease moved" recovery. The server can stop asserting 6941 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing 6942 * this operation is identified in the SEQUENCE operation in this 6943 * compound. 6944 */ 6945 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6946 { 6947 struct nfs_server *server = NFS_SERVER(inode); 6948 struct rpc_clnt *clnt = server->client; 6949 struct nfs4_fsid_present_arg args = { 6950 .fh = NFS_FH(inode), 6951 }; 6952 struct nfs4_fsid_present_res res = { 6953 }; 6954 struct rpc_message msg = { 6955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT], 6956 .rpc_argp = &args, 6957 .rpc_resp = &res, 6958 .rpc_cred = cred, 6959 }; 6960 int status; 6961 6962 res.fh = nfs_alloc_fhandle(); 6963 if (res.fh == NULL) 6964 return -ENOMEM; 6965 6966 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 6967 nfs4_set_sequence_privileged(&args.seq_args); 6968 status = nfs4_call_sync_sequence(clnt, server, &msg, 6969 &args.seq_args, &res.seq_res); 6970 nfs_free_fhandle(res.fh); 6971 if (status == NFS4_OK && 6972 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED) 6973 status = -NFS4ERR_LEASE_MOVED; 6974 return status; 6975 } 6976 6977 #endif /* CONFIG_NFS_V4_1 */ 6978 6979 /** 6980 * nfs4_proc_fsid_present - Is this FSID present or absent on server? 6981 * @inode: inode on FSID to check 6982 * @cred: credential to use for this operation 6983 * 6984 * Server indicates whether the FSID is present, moved, or not 6985 * recognized. This operation is necessary to clear a LEASE_MOVED 6986 * condition for this client ID. 6987 * 6988 * Returns NFS4_OK if the FSID is present on this server, 6989 * -NFS4ERR_MOVED if the FSID is no longer present, a negative 6990 * NFS4ERR code if some error occurred on the server, or a 6991 * negative errno if a local failure occurred. 6992 */ 6993 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred) 6994 { 6995 struct nfs_server *server = NFS_SERVER(inode); 6996 struct nfs_client *clp = server->nfs_client; 6997 const struct nfs4_mig_recovery_ops *ops = 6998 clp->cl_mvops->mig_recovery_ops; 6999 struct nfs4_exception exception = { }; 7000 int status; 7001 7002 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__, 7003 (unsigned long long)server->fsid.major, 7004 (unsigned long long)server->fsid.minor, 7005 clp->cl_hostname); 7006 nfs_display_fhandle(NFS_FH(inode), __func__); 7007 7008 do { 7009 status = ops->fsid_present(inode, cred); 7010 if (status != -NFS4ERR_DELAY) 7011 break; 7012 nfs4_handle_exception(server, status, &exception); 7013 } while (exception.retry); 7014 return status; 7015 } 7016 7017 /** 7018 * If 'use_integrity' is true and the state managment nfs_client 7019 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient 7020 * and the machine credential as per RFC3530bis and RFC5661 Security 7021 * Considerations sections. Otherwise, just use the user cred with the 7022 * filesystem's rpc_client. 7023 */ 7024 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity) 7025 { 7026 int status; 7027 struct nfs4_secinfo_arg args = { 7028 .dir_fh = NFS_FH(dir), 7029 .name = name, 7030 }; 7031 struct nfs4_secinfo_res res = { 7032 .flavors = flavors, 7033 }; 7034 struct rpc_message msg = { 7035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO], 7036 .rpc_argp = &args, 7037 .rpc_resp = &res, 7038 }; 7039 struct rpc_clnt *clnt = NFS_SERVER(dir)->client; 7040 struct rpc_cred *cred = NULL; 7041 7042 if (use_integrity) { 7043 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient; 7044 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client); 7045 msg.rpc_cred = cred; 7046 } 7047 7048 dprintk("NFS call secinfo %s\n", name->name); 7049 7050 nfs4_state_protect(NFS_SERVER(dir)->nfs_client, 7051 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg); 7052 7053 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args, 7054 &res.seq_res, 0); 7055 dprintk("NFS reply secinfo: %d\n", status); 7056 7057 if (cred) 7058 put_rpccred(cred); 7059 7060 return status; 7061 } 7062 7063 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, 7064 struct nfs4_secinfo_flavors *flavors) 7065 { 7066 struct nfs4_exception exception = { }; 7067 int err; 7068 do { 7069 err = -NFS4ERR_WRONGSEC; 7070 7071 /* try to use integrity protection with machine cred */ 7072 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client)) 7073 err = _nfs4_proc_secinfo(dir, name, flavors, true); 7074 7075 /* 7076 * if unable to use integrity protection, or SECINFO with 7077 * integrity protection returns NFS4ERR_WRONGSEC (which is 7078 * disallowed by spec, but exists in deployed servers) use 7079 * the current filesystem's rpc_client and the user cred. 7080 */ 7081 if (err == -NFS4ERR_WRONGSEC) 7082 err = _nfs4_proc_secinfo(dir, name, flavors, false); 7083 7084 trace_nfs4_secinfo(dir, name, err); 7085 err = nfs4_handle_exception(NFS_SERVER(dir), err, 7086 &exception); 7087 } while (exception.retry); 7088 return err; 7089 } 7090 7091 #ifdef CONFIG_NFS_V4_1 7092 /* 7093 * Check the exchange flags returned by the server for invalid flags, having 7094 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or 7095 * DS flags set. 7096 */ 7097 static int nfs4_check_cl_exchange_flags(u32 flags) 7098 { 7099 if (flags & ~EXCHGID4_FLAG_MASK_R) 7100 goto out_inval; 7101 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) && 7102 (flags & EXCHGID4_FLAG_USE_NON_PNFS)) 7103 goto out_inval; 7104 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS))) 7105 goto out_inval; 7106 return NFS_OK; 7107 out_inval: 7108 return -NFS4ERR_INVAL; 7109 } 7110 7111 static bool 7112 nfs41_same_server_scope(struct nfs41_server_scope *a, 7113 struct nfs41_server_scope *b) 7114 { 7115 if (a->server_scope_sz == b->server_scope_sz && 7116 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0) 7117 return true; 7118 7119 return false; 7120 } 7121 7122 static void 7123 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata) 7124 { 7125 } 7126 7127 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = { 7128 .rpc_call_done = &nfs4_bind_one_conn_to_session_done, 7129 }; 7130 7131 /* 7132 * nfs4_proc_bind_one_conn_to_session() 7133 * 7134 * The 4.1 client currently uses the same TCP connection for the 7135 * fore and backchannel. 7136 */ 7137 static 7138 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt, 7139 struct rpc_xprt *xprt, 7140 struct nfs_client *clp, 7141 struct rpc_cred *cred) 7142 { 7143 int status; 7144 struct nfs41_bind_conn_to_session_args args = { 7145 .client = clp, 7146 .dir = NFS4_CDFC4_FORE_OR_BOTH, 7147 }; 7148 struct nfs41_bind_conn_to_session_res res; 7149 struct rpc_message msg = { 7150 .rpc_proc = 7151 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION], 7152 .rpc_argp = &args, 7153 .rpc_resp = &res, 7154 .rpc_cred = cred, 7155 }; 7156 struct rpc_task_setup task_setup_data = { 7157 .rpc_client = clnt, 7158 .rpc_xprt = xprt, 7159 .callback_ops = &nfs4_bind_one_conn_to_session_ops, 7160 .rpc_message = &msg, 7161 .flags = RPC_TASK_TIMEOUT, 7162 }; 7163 struct rpc_task *task; 7164 7165 dprintk("--> %s\n", __func__); 7166 7167 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id); 7168 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN)) 7169 args.dir = NFS4_CDFC4_FORE; 7170 7171 /* Do not set the backchannel flag unless this is clnt->cl_xprt */ 7172 if (xprt != rcu_access_pointer(clnt->cl_xprt)) 7173 args.dir = NFS4_CDFC4_FORE; 7174 7175 task = rpc_run_task(&task_setup_data); 7176 if (!IS_ERR(task)) { 7177 status = task->tk_status; 7178 rpc_put_task(task); 7179 } else 7180 status = PTR_ERR(task); 7181 trace_nfs4_bind_conn_to_session(clp, status); 7182 if (status == 0) { 7183 if (memcmp(res.sessionid.data, 7184 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) { 7185 dprintk("NFS: %s: Session ID mismatch\n", __func__); 7186 status = -EIO; 7187 goto out; 7188 } 7189 if ((res.dir & args.dir) != res.dir || res.dir == 0) { 7190 dprintk("NFS: %s: Unexpected direction from server\n", 7191 __func__); 7192 status = -EIO; 7193 goto out; 7194 } 7195 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) { 7196 dprintk("NFS: %s: Server returned RDMA mode = true\n", 7197 __func__); 7198 status = -EIO; 7199 goto out; 7200 } 7201 } 7202 out: 7203 dprintk("<-- %s status= %d\n", __func__, status); 7204 return status; 7205 } 7206 7207 struct rpc_bind_conn_calldata { 7208 struct nfs_client *clp; 7209 struct rpc_cred *cred; 7210 }; 7211 7212 static int 7213 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt, 7214 struct rpc_xprt *xprt, 7215 void *calldata) 7216 { 7217 struct rpc_bind_conn_calldata *p = calldata; 7218 7219 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred); 7220 } 7221 7222 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred) 7223 { 7224 struct rpc_bind_conn_calldata data = { 7225 .clp = clp, 7226 .cred = cred, 7227 }; 7228 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient, 7229 nfs4_proc_bind_conn_to_session_callback, &data); 7230 } 7231 7232 /* 7233 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map 7234 * and operations we'd like to see to enable certain features in the allow map 7235 */ 7236 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = { 7237 .how = SP4_MACH_CRED, 7238 .enforce.u.words = { 7239 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 7240 1 << (OP_EXCHANGE_ID - 32) | 7241 1 << (OP_CREATE_SESSION - 32) | 7242 1 << (OP_DESTROY_SESSION - 32) | 7243 1 << (OP_DESTROY_CLIENTID - 32) 7244 }, 7245 .allow.u.words = { 7246 [0] = 1 << (OP_CLOSE) | 7247 1 << (OP_OPEN_DOWNGRADE) | 7248 1 << (OP_LOCKU) | 7249 1 << (OP_DELEGRETURN) | 7250 1 << (OP_COMMIT), 7251 [1] = 1 << (OP_SECINFO - 32) | 7252 1 << (OP_SECINFO_NO_NAME - 32) | 7253 1 << (OP_LAYOUTRETURN - 32) | 7254 1 << (OP_TEST_STATEID - 32) | 7255 1 << (OP_FREE_STATEID - 32) | 7256 1 << (OP_WRITE - 32) 7257 } 7258 }; 7259 7260 /* 7261 * Select the state protection mode for client `clp' given the server results 7262 * from exchange_id in `sp'. 7263 * 7264 * Returns 0 on success, negative errno otherwise. 7265 */ 7266 static int nfs4_sp4_select_mode(struct nfs_client *clp, 7267 struct nfs41_state_protection *sp) 7268 { 7269 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = { 7270 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) | 7271 1 << (OP_EXCHANGE_ID - 32) | 7272 1 << (OP_CREATE_SESSION - 32) | 7273 1 << (OP_DESTROY_SESSION - 32) | 7274 1 << (OP_DESTROY_CLIENTID - 32) 7275 }; 7276 unsigned int i; 7277 7278 if (sp->how == SP4_MACH_CRED) { 7279 /* Print state protect result */ 7280 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n"); 7281 for (i = 0; i <= LAST_NFS4_OP; i++) { 7282 if (test_bit(i, sp->enforce.u.longs)) 7283 dfprintk(MOUNT, " enforce op %d\n", i); 7284 if (test_bit(i, sp->allow.u.longs)) 7285 dfprintk(MOUNT, " allow op %d\n", i); 7286 } 7287 7288 /* make sure nothing is on enforce list that isn't supported */ 7289 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) { 7290 if (sp->enforce.u.words[i] & ~supported_enforce[i]) { 7291 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 7292 return -EINVAL; 7293 } 7294 } 7295 7296 /* 7297 * Minimal mode - state operations are allowed to use machine 7298 * credential. Note this already happens by default, so the 7299 * client doesn't have to do anything more than the negotiation. 7300 * 7301 * NOTE: we don't care if EXCHANGE_ID is in the list - 7302 * we're already using the machine cred for exchange_id 7303 * and will never use a different cred. 7304 */ 7305 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) && 7306 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) && 7307 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) && 7308 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) { 7309 dfprintk(MOUNT, "sp4_mach_cred:\n"); 7310 dfprintk(MOUNT, " minimal mode enabled\n"); 7311 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags); 7312 } else { 7313 dfprintk(MOUNT, "sp4_mach_cred: disabled\n"); 7314 return -EINVAL; 7315 } 7316 7317 if (test_bit(OP_CLOSE, sp->allow.u.longs) && 7318 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) && 7319 test_bit(OP_DELEGRETURN, sp->allow.u.longs) && 7320 test_bit(OP_LOCKU, sp->allow.u.longs)) { 7321 dfprintk(MOUNT, " cleanup mode enabled\n"); 7322 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags); 7323 } 7324 7325 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) { 7326 dfprintk(MOUNT, " pnfs cleanup mode enabled\n"); 7327 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, 7328 &clp->cl_sp4_flags); 7329 } 7330 7331 if (test_bit(OP_SECINFO, sp->allow.u.longs) && 7332 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) { 7333 dfprintk(MOUNT, " secinfo mode enabled\n"); 7334 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags); 7335 } 7336 7337 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) && 7338 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) { 7339 dfprintk(MOUNT, " stateid mode enabled\n"); 7340 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags); 7341 } 7342 7343 if (test_bit(OP_WRITE, sp->allow.u.longs)) { 7344 dfprintk(MOUNT, " write mode enabled\n"); 7345 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags); 7346 } 7347 7348 if (test_bit(OP_COMMIT, sp->allow.u.longs)) { 7349 dfprintk(MOUNT, " commit mode enabled\n"); 7350 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags); 7351 } 7352 } 7353 7354 return 0; 7355 } 7356 7357 struct nfs41_exchange_id_data { 7358 struct nfs41_exchange_id_res res; 7359 struct nfs41_exchange_id_args args; 7360 struct rpc_xprt *xprt; 7361 int rpc_status; 7362 }; 7363 7364 static void nfs4_exchange_id_done(struct rpc_task *task, void *data) 7365 { 7366 struct nfs41_exchange_id_data *cdata = 7367 (struct nfs41_exchange_id_data *)data; 7368 struct nfs_client *clp = cdata->args.client; 7369 int status = task->tk_status; 7370 7371 trace_nfs4_exchange_id(clp, status); 7372 7373 if (status == 0) 7374 status = nfs4_check_cl_exchange_flags(cdata->res.flags); 7375 7376 if (cdata->xprt && status == 0) { 7377 status = nfs4_detect_session_trunking(clp, &cdata->res, 7378 cdata->xprt); 7379 goto out; 7380 } 7381 7382 if (status == 0) 7383 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect); 7384 7385 if (status == 0) { 7386 clp->cl_clientid = cdata->res.clientid; 7387 clp->cl_exchange_flags = cdata->res.flags; 7388 /* Client ID is not confirmed */ 7389 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) { 7390 clear_bit(NFS4_SESSION_ESTABLISHED, 7391 &clp->cl_session->session_state); 7392 clp->cl_seqid = cdata->res.seqid; 7393 } 7394 7395 kfree(clp->cl_serverowner); 7396 clp->cl_serverowner = cdata->res.server_owner; 7397 cdata->res.server_owner = NULL; 7398 7399 /* use the most recent implementation id */ 7400 kfree(clp->cl_implid); 7401 clp->cl_implid = cdata->res.impl_id; 7402 cdata->res.impl_id = NULL; 7403 7404 if (clp->cl_serverscope != NULL && 7405 !nfs41_same_server_scope(clp->cl_serverscope, 7406 cdata->res.server_scope)) { 7407 dprintk("%s: server_scope mismatch detected\n", 7408 __func__); 7409 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state); 7410 kfree(clp->cl_serverscope); 7411 clp->cl_serverscope = NULL; 7412 } 7413 7414 if (clp->cl_serverscope == NULL) { 7415 clp->cl_serverscope = cdata->res.server_scope; 7416 cdata->res.server_scope = NULL; 7417 } 7418 /* Save the EXCHANGE_ID verifier session trunk tests */ 7419 memcpy(clp->cl_confirm.data, cdata->args.verifier->data, 7420 sizeof(clp->cl_confirm.data)); 7421 } 7422 out: 7423 cdata->rpc_status = status; 7424 return; 7425 } 7426 7427 static void nfs4_exchange_id_release(void *data) 7428 { 7429 struct nfs41_exchange_id_data *cdata = 7430 (struct nfs41_exchange_id_data *)data; 7431 7432 nfs_put_client(cdata->args.client); 7433 if (cdata->xprt) { 7434 xprt_put(cdata->xprt); 7435 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient); 7436 } 7437 kfree(cdata->res.impl_id); 7438 kfree(cdata->res.server_scope); 7439 kfree(cdata->res.server_owner); 7440 kfree(cdata); 7441 } 7442 7443 static const struct rpc_call_ops nfs4_exchange_id_call_ops = { 7444 .rpc_call_done = nfs4_exchange_id_done, 7445 .rpc_release = nfs4_exchange_id_release, 7446 }; 7447 7448 /* 7449 * _nfs4_proc_exchange_id() 7450 * 7451 * Wrapper for EXCHANGE_ID operation. 7452 */ 7453 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred, 7454 u32 sp4_how, struct rpc_xprt *xprt) 7455 { 7456 nfs4_verifier verifier; 7457 struct rpc_message msg = { 7458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID], 7459 .rpc_cred = cred, 7460 }; 7461 struct rpc_task_setup task_setup_data = { 7462 .rpc_client = clp->cl_rpcclient, 7463 .callback_ops = &nfs4_exchange_id_call_ops, 7464 .rpc_message = &msg, 7465 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 7466 }; 7467 struct nfs41_exchange_id_data *calldata; 7468 struct rpc_task *task; 7469 int status = -EIO; 7470 7471 if (!atomic_inc_not_zero(&clp->cl_count)) 7472 goto out; 7473 7474 status = -ENOMEM; 7475 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 7476 if (!calldata) 7477 goto out; 7478 7479 if (!xprt) 7480 nfs4_init_boot_verifier(clp, &verifier); 7481 7482 status = nfs4_init_uniform_client_string(clp); 7483 if (status) 7484 goto out_calldata; 7485 7486 dprintk("NFS call exchange_id auth=%s, '%s'\n", 7487 clp->cl_rpcclient->cl_auth->au_ops->au_name, 7488 clp->cl_owner_id); 7489 7490 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner), 7491 GFP_NOFS); 7492 status = -ENOMEM; 7493 if (unlikely(calldata->res.server_owner == NULL)) 7494 goto out_calldata; 7495 7496 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope), 7497 GFP_NOFS); 7498 if (unlikely(calldata->res.server_scope == NULL)) 7499 goto out_server_owner; 7500 7501 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS); 7502 if (unlikely(calldata->res.impl_id == NULL)) 7503 goto out_server_scope; 7504 7505 switch (sp4_how) { 7506 case SP4_NONE: 7507 calldata->args.state_protect.how = SP4_NONE; 7508 break; 7509 7510 case SP4_MACH_CRED: 7511 calldata->args.state_protect = nfs4_sp4_mach_cred_request; 7512 break; 7513 7514 default: 7515 /* unsupported! */ 7516 WARN_ON_ONCE(1); 7517 status = -EINVAL; 7518 goto out_impl_id; 7519 } 7520 if (xprt) { 7521 calldata->xprt = xprt; 7522 task_setup_data.rpc_xprt = xprt; 7523 task_setup_data.flags = 7524 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC; 7525 calldata->args.verifier = &clp->cl_confirm; 7526 } else { 7527 calldata->args.verifier = &verifier; 7528 } 7529 calldata->args.client = clp; 7530 #ifdef CONFIG_NFS_V4_1_MIGRATION 7531 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 7532 EXCHGID4_FLAG_BIND_PRINC_STATEID | 7533 EXCHGID4_FLAG_SUPP_MOVED_MIGR, 7534 #else 7535 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER | 7536 EXCHGID4_FLAG_BIND_PRINC_STATEID, 7537 #endif 7538 msg.rpc_argp = &calldata->args; 7539 msg.rpc_resp = &calldata->res; 7540 task_setup_data.callback_data = calldata; 7541 7542 task = rpc_run_task(&task_setup_data); 7543 if (IS_ERR(task)) { 7544 status = PTR_ERR(task); 7545 goto out_impl_id; 7546 } 7547 7548 if (!xprt) { 7549 status = rpc_wait_for_completion_task(task); 7550 if (!status) 7551 status = calldata->rpc_status; 7552 } else /* session trunking test */ 7553 status = calldata->rpc_status; 7554 7555 rpc_put_task(task); 7556 out: 7557 if (clp->cl_implid != NULL) 7558 dprintk("NFS reply exchange_id: Server Implementation ID: " 7559 "domain: %s, name: %s, date: %llu,%u\n", 7560 clp->cl_implid->domain, clp->cl_implid->name, 7561 clp->cl_implid->date.seconds, 7562 clp->cl_implid->date.nseconds); 7563 dprintk("NFS reply exchange_id: %d\n", status); 7564 return status; 7565 7566 out_impl_id: 7567 kfree(calldata->res.impl_id); 7568 out_server_scope: 7569 kfree(calldata->res.server_scope); 7570 out_server_owner: 7571 kfree(calldata->res.server_owner); 7572 out_calldata: 7573 kfree(calldata); 7574 goto out; 7575 } 7576 7577 /* 7578 * nfs4_proc_exchange_id() 7579 * 7580 * Returns zero, a negative errno, or a negative NFS4ERR status code. 7581 * 7582 * Since the clientid has expired, all compounds using sessions 7583 * associated with the stale clientid will be returning 7584 * NFS4ERR_BADSESSION in the sequence operation, and will therefore 7585 * be in some phase of session reset. 7586 * 7587 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used. 7588 */ 7589 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred) 7590 { 7591 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor; 7592 int status; 7593 7594 /* try SP4_MACH_CRED if krb5i/p */ 7595 if (authflavor == RPC_AUTH_GSS_KRB5I || 7596 authflavor == RPC_AUTH_GSS_KRB5P) { 7597 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL); 7598 if (!status) 7599 return 0; 7600 } 7601 7602 /* try SP4_NONE */ 7603 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL); 7604 } 7605 7606 /** 7607 * nfs4_test_session_trunk 7608 * 7609 * This is an add_xprt_test() test function called from 7610 * rpc_clnt_setup_test_and_add_xprt. 7611 * 7612 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt 7613 * and is dereferrenced in nfs4_exchange_id_release 7614 * 7615 * Upon success, add the new transport to the rpc_clnt 7616 * 7617 * @clnt: struct rpc_clnt to get new transport 7618 * @xprt: the rpc_xprt to test 7619 * @data: call data for _nfs4_proc_exchange_id. 7620 */ 7621 int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt, 7622 void *data) 7623 { 7624 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data; 7625 u32 sp4_how; 7626 7627 dprintk("--> %s try %s\n", __func__, 7628 xprt->address_strings[RPC_DISPLAY_ADDR]); 7629 7630 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED); 7631 7632 /* Test connection for session trunking. Async exchange_id call */ 7633 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt); 7634 } 7635 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk); 7636 7637 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp, 7638 struct rpc_cred *cred) 7639 { 7640 struct rpc_message msg = { 7641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID], 7642 .rpc_argp = clp, 7643 .rpc_cred = cred, 7644 }; 7645 int status; 7646 7647 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 7648 trace_nfs4_destroy_clientid(clp, status); 7649 if (status) 7650 dprintk("NFS: Got error %d from the server %s on " 7651 "DESTROY_CLIENTID.", status, clp->cl_hostname); 7652 return status; 7653 } 7654 7655 static int nfs4_proc_destroy_clientid(struct nfs_client *clp, 7656 struct rpc_cred *cred) 7657 { 7658 unsigned int loop; 7659 int ret; 7660 7661 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) { 7662 ret = _nfs4_proc_destroy_clientid(clp, cred); 7663 switch (ret) { 7664 case -NFS4ERR_DELAY: 7665 case -NFS4ERR_CLIENTID_BUSY: 7666 ssleep(1); 7667 break; 7668 default: 7669 return ret; 7670 } 7671 } 7672 return 0; 7673 } 7674 7675 int nfs4_destroy_clientid(struct nfs_client *clp) 7676 { 7677 struct rpc_cred *cred; 7678 int ret = 0; 7679 7680 if (clp->cl_mvops->minor_version < 1) 7681 goto out; 7682 if (clp->cl_exchange_flags == 0) 7683 goto out; 7684 if (clp->cl_preserve_clid) 7685 goto out; 7686 cred = nfs4_get_clid_cred(clp); 7687 ret = nfs4_proc_destroy_clientid(clp, cred); 7688 if (cred) 7689 put_rpccred(cred); 7690 switch (ret) { 7691 case 0: 7692 case -NFS4ERR_STALE_CLIENTID: 7693 clp->cl_exchange_flags = 0; 7694 } 7695 out: 7696 return ret; 7697 } 7698 7699 struct nfs4_get_lease_time_data { 7700 struct nfs4_get_lease_time_args *args; 7701 struct nfs4_get_lease_time_res *res; 7702 struct nfs_client *clp; 7703 }; 7704 7705 static void nfs4_get_lease_time_prepare(struct rpc_task *task, 7706 void *calldata) 7707 { 7708 struct nfs4_get_lease_time_data *data = 7709 (struct nfs4_get_lease_time_data *)calldata; 7710 7711 dprintk("--> %s\n", __func__); 7712 /* just setup sequence, do not trigger session recovery 7713 since we're invoked within one */ 7714 nfs41_setup_sequence(data->clp->cl_session, 7715 &data->args->la_seq_args, 7716 &data->res->lr_seq_res, 7717 task); 7718 dprintk("<-- %s\n", __func__); 7719 } 7720 7721 /* 7722 * Called from nfs4_state_manager thread for session setup, so don't recover 7723 * from sequence operation or clientid errors. 7724 */ 7725 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata) 7726 { 7727 struct nfs4_get_lease_time_data *data = 7728 (struct nfs4_get_lease_time_data *)calldata; 7729 7730 dprintk("--> %s\n", __func__); 7731 if (!nfs41_sequence_done(task, &data->res->lr_seq_res)) 7732 return; 7733 switch (task->tk_status) { 7734 case -NFS4ERR_DELAY: 7735 case -NFS4ERR_GRACE: 7736 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status); 7737 rpc_delay(task, NFS4_POLL_RETRY_MIN); 7738 task->tk_status = 0; 7739 /* fall through */ 7740 case -NFS4ERR_RETRY_UNCACHED_REP: 7741 rpc_restart_call_prepare(task); 7742 return; 7743 } 7744 dprintk("<-- %s\n", __func__); 7745 } 7746 7747 static const struct rpc_call_ops nfs4_get_lease_time_ops = { 7748 .rpc_call_prepare = nfs4_get_lease_time_prepare, 7749 .rpc_call_done = nfs4_get_lease_time_done, 7750 }; 7751 7752 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo) 7753 { 7754 struct rpc_task *task; 7755 struct nfs4_get_lease_time_args args; 7756 struct nfs4_get_lease_time_res res = { 7757 .lr_fsinfo = fsinfo, 7758 }; 7759 struct nfs4_get_lease_time_data data = { 7760 .args = &args, 7761 .res = &res, 7762 .clp = clp, 7763 }; 7764 struct rpc_message msg = { 7765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME], 7766 .rpc_argp = &args, 7767 .rpc_resp = &res, 7768 }; 7769 struct rpc_task_setup task_setup = { 7770 .rpc_client = clp->cl_rpcclient, 7771 .rpc_message = &msg, 7772 .callback_ops = &nfs4_get_lease_time_ops, 7773 .callback_data = &data, 7774 .flags = RPC_TASK_TIMEOUT, 7775 }; 7776 int status; 7777 7778 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0); 7779 nfs4_set_sequence_privileged(&args.la_seq_args); 7780 dprintk("--> %s\n", __func__); 7781 task = rpc_run_task(&task_setup); 7782 7783 if (IS_ERR(task)) 7784 status = PTR_ERR(task); 7785 else { 7786 status = task->tk_status; 7787 rpc_put_task(task); 7788 } 7789 dprintk("<-- %s return %d\n", __func__, status); 7790 7791 return status; 7792 } 7793 7794 /* 7795 * Initialize the values to be used by the client in CREATE_SESSION 7796 * If nfs4_init_session set the fore channel request and response sizes, 7797 * use them. 7798 * 7799 * Set the back channel max_resp_sz_cached to zero to force the client to 7800 * always set csa_cachethis to FALSE because the current implementation 7801 * of the back channel DRC only supports caching the CB_SEQUENCE operation. 7802 */ 7803 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args, 7804 struct rpc_clnt *clnt) 7805 { 7806 unsigned int max_rqst_sz, max_resp_sz; 7807 unsigned int max_bc_payload = rpc_max_bc_payload(clnt); 7808 7809 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead; 7810 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead; 7811 7812 /* Fore channel attributes */ 7813 args->fc_attrs.max_rqst_sz = max_rqst_sz; 7814 args->fc_attrs.max_resp_sz = max_resp_sz; 7815 args->fc_attrs.max_ops = NFS4_MAX_OPS; 7816 args->fc_attrs.max_reqs = max_session_slots; 7817 7818 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u " 7819 "max_ops=%u max_reqs=%u\n", 7820 __func__, 7821 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz, 7822 args->fc_attrs.max_ops, args->fc_attrs.max_reqs); 7823 7824 /* Back channel attributes */ 7825 args->bc_attrs.max_rqst_sz = max_bc_payload; 7826 args->bc_attrs.max_resp_sz = max_bc_payload; 7827 args->bc_attrs.max_resp_sz_cached = 0; 7828 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS; 7829 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1); 7830 7831 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u " 7832 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n", 7833 __func__, 7834 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz, 7835 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops, 7836 args->bc_attrs.max_reqs); 7837 } 7838 7839 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, 7840 struct nfs41_create_session_res *res) 7841 { 7842 struct nfs4_channel_attrs *sent = &args->fc_attrs; 7843 struct nfs4_channel_attrs *rcvd = &res->fc_attrs; 7844 7845 if (rcvd->max_resp_sz > sent->max_resp_sz) 7846 return -EINVAL; 7847 /* 7848 * Our requested max_ops is the minimum we need; we're not 7849 * prepared to break up compounds into smaller pieces than that. 7850 * So, no point even trying to continue if the server won't 7851 * cooperate: 7852 */ 7853 if (rcvd->max_ops < sent->max_ops) 7854 return -EINVAL; 7855 if (rcvd->max_reqs == 0) 7856 return -EINVAL; 7857 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE) 7858 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE; 7859 return 0; 7860 } 7861 7862 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, 7863 struct nfs41_create_session_res *res) 7864 { 7865 struct nfs4_channel_attrs *sent = &args->bc_attrs; 7866 struct nfs4_channel_attrs *rcvd = &res->bc_attrs; 7867 7868 if (!(res->flags & SESSION4_BACK_CHAN)) 7869 goto out; 7870 if (rcvd->max_rqst_sz > sent->max_rqst_sz) 7871 return -EINVAL; 7872 if (rcvd->max_resp_sz < sent->max_resp_sz) 7873 return -EINVAL; 7874 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached) 7875 return -EINVAL; 7876 if (rcvd->max_ops > sent->max_ops) 7877 return -EINVAL; 7878 if (rcvd->max_reqs > sent->max_reqs) 7879 return -EINVAL; 7880 out: 7881 return 0; 7882 } 7883 7884 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args, 7885 struct nfs41_create_session_res *res) 7886 { 7887 int ret; 7888 7889 ret = nfs4_verify_fore_channel_attrs(args, res); 7890 if (ret) 7891 return ret; 7892 return nfs4_verify_back_channel_attrs(args, res); 7893 } 7894 7895 static void nfs4_update_session(struct nfs4_session *session, 7896 struct nfs41_create_session_res *res) 7897 { 7898 nfs4_copy_sessionid(&session->sess_id, &res->sessionid); 7899 /* Mark client id and session as being confirmed */ 7900 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 7901 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state); 7902 session->flags = res->flags; 7903 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs)); 7904 if (res->flags & SESSION4_BACK_CHAN) 7905 memcpy(&session->bc_attrs, &res->bc_attrs, 7906 sizeof(session->bc_attrs)); 7907 } 7908 7909 static int _nfs4_proc_create_session(struct nfs_client *clp, 7910 struct rpc_cred *cred) 7911 { 7912 struct nfs4_session *session = clp->cl_session; 7913 struct nfs41_create_session_args args = { 7914 .client = clp, 7915 .clientid = clp->cl_clientid, 7916 .seqid = clp->cl_seqid, 7917 .cb_program = NFS4_CALLBACK, 7918 }; 7919 struct nfs41_create_session_res res; 7920 7921 struct rpc_message msg = { 7922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION], 7923 .rpc_argp = &args, 7924 .rpc_resp = &res, 7925 .rpc_cred = cred, 7926 }; 7927 int status; 7928 7929 nfs4_init_channel_attrs(&args, clp->cl_rpcclient); 7930 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN); 7931 7932 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 7933 trace_nfs4_create_session(clp, status); 7934 7935 switch (status) { 7936 case -NFS4ERR_STALE_CLIENTID: 7937 case -NFS4ERR_DELAY: 7938 case -ETIMEDOUT: 7939 case -EACCES: 7940 case -EAGAIN: 7941 goto out; 7942 }; 7943 7944 clp->cl_seqid++; 7945 if (!status) { 7946 /* Verify the session's negotiated channel_attrs values */ 7947 status = nfs4_verify_channel_attrs(&args, &res); 7948 /* Increment the clientid slot sequence id */ 7949 if (status) 7950 goto out; 7951 nfs4_update_session(session, &res); 7952 } 7953 out: 7954 return status; 7955 } 7956 7957 /* 7958 * Issues a CREATE_SESSION operation to the server. 7959 * It is the responsibility of the caller to verify the session is 7960 * expired before calling this routine. 7961 */ 7962 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred) 7963 { 7964 int status; 7965 unsigned *ptr; 7966 struct nfs4_session *session = clp->cl_session; 7967 7968 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session); 7969 7970 status = _nfs4_proc_create_session(clp, cred); 7971 if (status) 7972 goto out; 7973 7974 /* Init or reset the session slot tables */ 7975 status = nfs4_setup_session_slot_tables(session); 7976 dprintk("slot table setup returned %d\n", status); 7977 if (status) 7978 goto out; 7979 7980 ptr = (unsigned *)&session->sess_id.data[0]; 7981 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__, 7982 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]); 7983 out: 7984 dprintk("<-- %s\n", __func__); 7985 return status; 7986 } 7987 7988 /* 7989 * Issue the over-the-wire RPC DESTROY_SESSION. 7990 * The caller must serialize access to this routine. 7991 */ 7992 int nfs4_proc_destroy_session(struct nfs4_session *session, 7993 struct rpc_cred *cred) 7994 { 7995 struct rpc_message msg = { 7996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION], 7997 .rpc_argp = session, 7998 .rpc_cred = cred, 7999 }; 8000 int status = 0; 8001 8002 dprintk("--> nfs4_proc_destroy_session\n"); 8003 8004 /* session is still being setup */ 8005 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state)) 8006 return 0; 8007 8008 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT); 8009 trace_nfs4_destroy_session(session->clp, status); 8010 8011 if (status) 8012 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. " 8013 "Session has been destroyed regardless...\n", status); 8014 8015 dprintk("<-- nfs4_proc_destroy_session\n"); 8016 return status; 8017 } 8018 8019 /* 8020 * Renew the cl_session lease. 8021 */ 8022 struct nfs4_sequence_data { 8023 struct nfs_client *clp; 8024 struct nfs4_sequence_args args; 8025 struct nfs4_sequence_res res; 8026 }; 8027 8028 static void nfs41_sequence_release(void *data) 8029 { 8030 struct nfs4_sequence_data *calldata = data; 8031 struct nfs_client *clp = calldata->clp; 8032 8033 if (atomic_read(&clp->cl_count) > 1) 8034 nfs4_schedule_state_renewal(clp); 8035 nfs_put_client(clp); 8036 kfree(calldata); 8037 } 8038 8039 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp) 8040 { 8041 switch(task->tk_status) { 8042 case -NFS4ERR_DELAY: 8043 rpc_delay(task, NFS4_POLL_RETRY_MAX); 8044 return -EAGAIN; 8045 default: 8046 nfs4_schedule_lease_recovery(clp); 8047 } 8048 return 0; 8049 } 8050 8051 static void nfs41_sequence_call_done(struct rpc_task *task, void *data) 8052 { 8053 struct nfs4_sequence_data *calldata = data; 8054 struct nfs_client *clp = calldata->clp; 8055 8056 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp)) 8057 return; 8058 8059 trace_nfs4_sequence(clp, task->tk_status); 8060 if (task->tk_status < 0) { 8061 dprintk("%s ERROR %d\n", __func__, task->tk_status); 8062 if (atomic_read(&clp->cl_count) == 1) 8063 goto out; 8064 8065 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) { 8066 rpc_restart_call_prepare(task); 8067 return; 8068 } 8069 } 8070 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred); 8071 out: 8072 dprintk("<-- %s\n", __func__); 8073 } 8074 8075 static void nfs41_sequence_prepare(struct rpc_task *task, void *data) 8076 { 8077 struct nfs4_sequence_data *calldata = data; 8078 struct nfs_client *clp = calldata->clp; 8079 struct nfs4_sequence_args *args; 8080 struct nfs4_sequence_res *res; 8081 8082 args = task->tk_msg.rpc_argp; 8083 res = task->tk_msg.rpc_resp; 8084 8085 nfs41_setup_sequence(clp->cl_session, args, res, task); 8086 } 8087 8088 static const struct rpc_call_ops nfs41_sequence_ops = { 8089 .rpc_call_done = nfs41_sequence_call_done, 8090 .rpc_call_prepare = nfs41_sequence_prepare, 8091 .rpc_release = nfs41_sequence_release, 8092 }; 8093 8094 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, 8095 struct rpc_cred *cred, 8096 bool is_privileged) 8097 { 8098 struct nfs4_sequence_data *calldata; 8099 struct rpc_message msg = { 8100 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE], 8101 .rpc_cred = cred, 8102 }; 8103 struct rpc_task_setup task_setup_data = { 8104 .rpc_client = clp->cl_rpcclient, 8105 .rpc_message = &msg, 8106 .callback_ops = &nfs41_sequence_ops, 8107 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT, 8108 }; 8109 8110 if (!atomic_inc_not_zero(&clp->cl_count)) 8111 return ERR_PTR(-EIO); 8112 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8113 if (calldata == NULL) { 8114 nfs_put_client(clp); 8115 return ERR_PTR(-ENOMEM); 8116 } 8117 nfs4_init_sequence(&calldata->args, &calldata->res, 0); 8118 if (is_privileged) 8119 nfs4_set_sequence_privileged(&calldata->args); 8120 msg.rpc_argp = &calldata->args; 8121 msg.rpc_resp = &calldata->res; 8122 calldata->clp = clp; 8123 task_setup_data.callback_data = calldata; 8124 8125 return rpc_run_task(&task_setup_data); 8126 } 8127 8128 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags) 8129 { 8130 struct rpc_task *task; 8131 int ret = 0; 8132 8133 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0) 8134 return -EAGAIN; 8135 task = _nfs41_proc_sequence(clp, cred, false); 8136 if (IS_ERR(task)) 8137 ret = PTR_ERR(task); 8138 else 8139 rpc_put_task_async(task); 8140 dprintk("<-- %s status=%d\n", __func__, ret); 8141 return ret; 8142 } 8143 8144 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred) 8145 { 8146 struct rpc_task *task; 8147 int ret; 8148 8149 task = _nfs41_proc_sequence(clp, cred, true); 8150 if (IS_ERR(task)) { 8151 ret = PTR_ERR(task); 8152 goto out; 8153 } 8154 ret = rpc_wait_for_completion_task(task); 8155 if (!ret) 8156 ret = task->tk_status; 8157 rpc_put_task(task); 8158 out: 8159 dprintk("<-- %s status=%d\n", __func__, ret); 8160 return ret; 8161 } 8162 8163 struct nfs4_reclaim_complete_data { 8164 struct nfs_client *clp; 8165 struct nfs41_reclaim_complete_args arg; 8166 struct nfs41_reclaim_complete_res res; 8167 }; 8168 8169 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data) 8170 { 8171 struct nfs4_reclaim_complete_data *calldata = data; 8172 8173 nfs41_setup_sequence(calldata->clp->cl_session, 8174 &calldata->arg.seq_args, 8175 &calldata->res.seq_res, 8176 task); 8177 } 8178 8179 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp) 8180 { 8181 switch(task->tk_status) { 8182 case 0: 8183 case -NFS4ERR_COMPLETE_ALREADY: 8184 case -NFS4ERR_WRONG_CRED: /* What to do here? */ 8185 break; 8186 case -NFS4ERR_DELAY: 8187 rpc_delay(task, NFS4_POLL_RETRY_MAX); 8188 /* fall through */ 8189 case -NFS4ERR_RETRY_UNCACHED_REP: 8190 return -EAGAIN; 8191 default: 8192 nfs4_schedule_lease_recovery(clp); 8193 } 8194 return 0; 8195 } 8196 8197 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data) 8198 { 8199 struct nfs4_reclaim_complete_data *calldata = data; 8200 struct nfs_client *clp = calldata->clp; 8201 struct nfs4_sequence_res *res = &calldata->res.seq_res; 8202 8203 dprintk("--> %s\n", __func__); 8204 if (!nfs41_sequence_done(task, res)) 8205 return; 8206 8207 trace_nfs4_reclaim_complete(clp, task->tk_status); 8208 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) { 8209 rpc_restart_call_prepare(task); 8210 return; 8211 } 8212 dprintk("<-- %s\n", __func__); 8213 } 8214 8215 static void nfs4_free_reclaim_complete_data(void *data) 8216 { 8217 struct nfs4_reclaim_complete_data *calldata = data; 8218 8219 kfree(calldata); 8220 } 8221 8222 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = { 8223 .rpc_call_prepare = nfs4_reclaim_complete_prepare, 8224 .rpc_call_done = nfs4_reclaim_complete_done, 8225 .rpc_release = nfs4_free_reclaim_complete_data, 8226 }; 8227 8228 /* 8229 * Issue a global reclaim complete. 8230 */ 8231 static int nfs41_proc_reclaim_complete(struct nfs_client *clp, 8232 struct rpc_cred *cred) 8233 { 8234 struct nfs4_reclaim_complete_data *calldata; 8235 struct rpc_task *task; 8236 struct rpc_message msg = { 8237 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE], 8238 .rpc_cred = cred, 8239 }; 8240 struct rpc_task_setup task_setup_data = { 8241 .rpc_client = clp->cl_rpcclient, 8242 .rpc_message = &msg, 8243 .callback_ops = &nfs4_reclaim_complete_call_ops, 8244 .flags = RPC_TASK_ASYNC, 8245 }; 8246 int status = -ENOMEM; 8247 8248 dprintk("--> %s\n", __func__); 8249 calldata = kzalloc(sizeof(*calldata), GFP_NOFS); 8250 if (calldata == NULL) 8251 goto out; 8252 calldata->clp = clp; 8253 calldata->arg.one_fs = 0; 8254 8255 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0); 8256 nfs4_set_sequence_privileged(&calldata->arg.seq_args); 8257 msg.rpc_argp = &calldata->arg; 8258 msg.rpc_resp = &calldata->res; 8259 task_setup_data.callback_data = calldata; 8260 task = rpc_run_task(&task_setup_data); 8261 if (IS_ERR(task)) { 8262 status = PTR_ERR(task); 8263 goto out; 8264 } 8265 status = nfs4_wait_for_completion_rpc_task(task); 8266 if (status == 0) 8267 status = task->tk_status; 8268 rpc_put_task(task); 8269 return 0; 8270 out: 8271 dprintk("<-- %s status=%d\n", __func__, status); 8272 return status; 8273 } 8274 8275 static void 8276 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata) 8277 { 8278 struct nfs4_layoutget *lgp = calldata; 8279 struct nfs_server *server = NFS_SERVER(lgp->args.inode); 8280 struct nfs4_session *session = nfs4_get_session(server); 8281 8282 dprintk("--> %s\n", __func__); 8283 nfs41_setup_sequence(session, &lgp->args.seq_args, 8284 &lgp->res.seq_res, task); 8285 dprintk("<-- %s\n", __func__); 8286 } 8287 8288 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata) 8289 { 8290 struct nfs4_layoutget *lgp = calldata; 8291 8292 dprintk("--> %s\n", __func__); 8293 nfs41_sequence_process(task, &lgp->res.seq_res); 8294 dprintk("<-- %s\n", __func__); 8295 } 8296 8297 static int 8298 nfs4_layoutget_handle_exception(struct rpc_task *task, 8299 struct nfs4_layoutget *lgp, struct nfs4_exception *exception) 8300 { 8301 struct inode *inode = lgp->args.inode; 8302 struct nfs_server *server = NFS_SERVER(inode); 8303 struct pnfs_layout_hdr *lo; 8304 int nfs4err = task->tk_status; 8305 int err, status = 0; 8306 LIST_HEAD(head); 8307 8308 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status); 8309 8310 switch (nfs4err) { 8311 case 0: 8312 goto out; 8313 8314 /* 8315 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs 8316 * on the file. set tk_status to -ENODATA to tell upper layer to 8317 * retry go inband. 8318 */ 8319 case -NFS4ERR_LAYOUTUNAVAILABLE: 8320 status = -ENODATA; 8321 goto out; 8322 /* 8323 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of 8324 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3). 8325 */ 8326 case -NFS4ERR_BADLAYOUT: 8327 status = -EOVERFLOW; 8328 goto out; 8329 /* 8330 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client 8331 * (or clients) writing to the same RAID stripe except when 8332 * the minlength argument is 0 (see RFC5661 section 18.43.3). 8333 * 8334 * Treat it like we would RECALLCONFLICT -- we retry for a little 8335 * while, and then eventually give up. 8336 */ 8337 case -NFS4ERR_LAYOUTTRYLATER: 8338 if (lgp->args.minlength == 0) { 8339 status = -EOVERFLOW; 8340 goto out; 8341 } 8342 status = -EBUSY; 8343 break; 8344 case -NFS4ERR_RECALLCONFLICT: 8345 status = -ERECALLCONFLICT; 8346 break; 8347 case -NFS4ERR_DELEG_REVOKED: 8348 case -NFS4ERR_ADMIN_REVOKED: 8349 case -NFS4ERR_EXPIRED: 8350 case -NFS4ERR_BAD_STATEID: 8351 exception->timeout = 0; 8352 spin_lock(&inode->i_lock); 8353 lo = NFS_I(inode)->layout; 8354 /* If the open stateid was bad, then recover it. */ 8355 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) || 8356 nfs4_stateid_match_other(&lgp->args.stateid, 8357 &lgp->args.ctx->state->stateid)) { 8358 spin_unlock(&inode->i_lock); 8359 exception->state = lgp->args.ctx->state; 8360 exception->stateid = &lgp->args.stateid; 8361 break; 8362 } 8363 8364 /* 8365 * Mark the bad layout state as invalid, then retry 8366 */ 8367 pnfs_mark_layout_stateid_invalid(lo, &head); 8368 spin_unlock(&inode->i_lock); 8369 pnfs_free_lseg_list(&head); 8370 status = -EAGAIN; 8371 goto out; 8372 } 8373 8374 err = nfs4_handle_exception(server, nfs4err, exception); 8375 if (!status) { 8376 if (exception->retry) 8377 status = -EAGAIN; 8378 else 8379 status = err; 8380 } 8381 out: 8382 dprintk("<-- %s\n", __func__); 8383 return status; 8384 } 8385 8386 static size_t max_response_pages(struct nfs_server *server) 8387 { 8388 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz; 8389 return nfs_page_array_len(0, max_resp_sz); 8390 } 8391 8392 static void nfs4_free_pages(struct page **pages, size_t size) 8393 { 8394 int i; 8395 8396 if (!pages) 8397 return; 8398 8399 for (i = 0; i < size; i++) { 8400 if (!pages[i]) 8401 break; 8402 __free_page(pages[i]); 8403 } 8404 kfree(pages); 8405 } 8406 8407 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags) 8408 { 8409 struct page **pages; 8410 int i; 8411 8412 pages = kcalloc(size, sizeof(struct page *), gfp_flags); 8413 if (!pages) { 8414 dprintk("%s: can't alloc array of %zu pages\n", __func__, size); 8415 return NULL; 8416 } 8417 8418 for (i = 0; i < size; i++) { 8419 pages[i] = alloc_page(gfp_flags); 8420 if (!pages[i]) { 8421 dprintk("%s: failed to allocate page\n", __func__); 8422 nfs4_free_pages(pages, size); 8423 return NULL; 8424 } 8425 } 8426 8427 return pages; 8428 } 8429 8430 static void nfs4_layoutget_release(void *calldata) 8431 { 8432 struct nfs4_layoutget *lgp = calldata; 8433 struct inode *inode = lgp->args.inode; 8434 struct nfs_server *server = NFS_SERVER(inode); 8435 size_t max_pages = max_response_pages(server); 8436 8437 dprintk("--> %s\n", __func__); 8438 nfs4_free_pages(lgp->args.layout.pages, max_pages); 8439 pnfs_put_layout_hdr(NFS_I(inode)->layout); 8440 put_nfs_open_context(lgp->args.ctx); 8441 kfree(calldata); 8442 dprintk("<-- %s\n", __func__); 8443 } 8444 8445 static const struct rpc_call_ops nfs4_layoutget_call_ops = { 8446 .rpc_call_prepare = nfs4_layoutget_prepare, 8447 .rpc_call_done = nfs4_layoutget_done, 8448 .rpc_release = nfs4_layoutget_release, 8449 }; 8450 8451 struct pnfs_layout_segment * 8452 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags) 8453 { 8454 struct inode *inode = lgp->args.inode; 8455 struct nfs_server *server = NFS_SERVER(inode); 8456 size_t max_pages = max_response_pages(server); 8457 struct rpc_task *task; 8458 struct rpc_message msg = { 8459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET], 8460 .rpc_argp = &lgp->args, 8461 .rpc_resp = &lgp->res, 8462 .rpc_cred = lgp->cred, 8463 }; 8464 struct rpc_task_setup task_setup_data = { 8465 .rpc_client = server->client, 8466 .rpc_message = &msg, 8467 .callback_ops = &nfs4_layoutget_call_ops, 8468 .callback_data = lgp, 8469 .flags = RPC_TASK_ASYNC, 8470 }; 8471 struct pnfs_layout_segment *lseg = NULL; 8472 struct nfs4_exception exception = { 8473 .inode = inode, 8474 .timeout = *timeout, 8475 }; 8476 int status = 0; 8477 8478 dprintk("--> %s\n", __func__); 8479 8480 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */ 8481 pnfs_get_layout_hdr(NFS_I(inode)->layout); 8482 8483 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags); 8484 if (!lgp->args.layout.pages) { 8485 nfs4_layoutget_release(lgp); 8486 return ERR_PTR(-ENOMEM); 8487 } 8488 lgp->args.layout.pglen = max_pages * PAGE_SIZE; 8489 8490 lgp->res.layoutp = &lgp->args.layout; 8491 lgp->res.seq_res.sr_slot = NULL; 8492 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0); 8493 8494 task = rpc_run_task(&task_setup_data); 8495 if (IS_ERR(task)) 8496 return ERR_CAST(task); 8497 status = nfs4_wait_for_completion_rpc_task(task); 8498 if (status == 0) { 8499 status = nfs4_layoutget_handle_exception(task, lgp, &exception); 8500 *timeout = exception.timeout; 8501 } 8502 8503 trace_nfs4_layoutget(lgp->args.ctx, 8504 &lgp->args.range, 8505 &lgp->res.range, 8506 &lgp->res.stateid, 8507 status); 8508 8509 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */ 8510 if (status == 0 && lgp->res.layoutp->len) 8511 lseg = pnfs_layout_process(lgp); 8512 nfs4_sequence_free_slot(&lgp->res.seq_res); 8513 rpc_put_task(task); 8514 dprintk("<-- %s status=%d\n", __func__, status); 8515 if (status) 8516 return ERR_PTR(status); 8517 return lseg; 8518 } 8519 8520 static void 8521 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata) 8522 { 8523 struct nfs4_layoutreturn *lrp = calldata; 8524 8525 dprintk("--> %s\n", __func__); 8526 nfs41_setup_sequence(lrp->clp->cl_session, 8527 &lrp->args.seq_args, 8528 &lrp->res.seq_res, 8529 task); 8530 } 8531 8532 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata) 8533 { 8534 struct nfs4_layoutreturn *lrp = calldata; 8535 struct nfs_server *server; 8536 8537 dprintk("--> %s\n", __func__); 8538 8539 if (!nfs41_sequence_process(task, &lrp->res.seq_res)) 8540 return; 8541 8542 server = NFS_SERVER(lrp->args.inode); 8543 switch (task->tk_status) { 8544 default: 8545 task->tk_status = 0; 8546 case 0: 8547 break; 8548 case -NFS4ERR_DELAY: 8549 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN) 8550 break; 8551 nfs4_sequence_free_slot(&lrp->res.seq_res); 8552 rpc_restart_call_prepare(task); 8553 return; 8554 } 8555 dprintk("<-- %s\n", __func__); 8556 } 8557 8558 static void nfs4_layoutreturn_release(void *calldata) 8559 { 8560 struct nfs4_layoutreturn *lrp = calldata; 8561 struct pnfs_layout_hdr *lo = lrp->args.layout; 8562 LIST_HEAD(freeme); 8563 8564 dprintk("--> %s\n", __func__); 8565 spin_lock(&lo->plh_inode->i_lock); 8566 if (lrp->res.lrs_present) { 8567 pnfs_mark_matching_lsegs_invalid(lo, &freeme, 8568 &lrp->args.range, 8569 be32_to_cpu(lrp->args.stateid.seqid)); 8570 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true); 8571 } else 8572 pnfs_mark_layout_stateid_invalid(lo, &freeme); 8573 pnfs_clear_layoutreturn_waitbit(lo); 8574 spin_unlock(&lo->plh_inode->i_lock); 8575 nfs4_sequence_free_slot(&lrp->res.seq_res); 8576 pnfs_free_lseg_list(&freeme); 8577 pnfs_put_layout_hdr(lrp->args.layout); 8578 nfs_iput_and_deactive(lrp->inode); 8579 kfree(calldata); 8580 dprintk("<-- %s\n", __func__); 8581 } 8582 8583 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = { 8584 .rpc_call_prepare = nfs4_layoutreturn_prepare, 8585 .rpc_call_done = nfs4_layoutreturn_done, 8586 .rpc_release = nfs4_layoutreturn_release, 8587 }; 8588 8589 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync) 8590 { 8591 struct rpc_task *task; 8592 struct rpc_message msg = { 8593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN], 8594 .rpc_argp = &lrp->args, 8595 .rpc_resp = &lrp->res, 8596 .rpc_cred = lrp->cred, 8597 }; 8598 struct rpc_task_setup task_setup_data = { 8599 .rpc_client = NFS_SERVER(lrp->args.inode)->client, 8600 .rpc_message = &msg, 8601 .callback_ops = &nfs4_layoutreturn_call_ops, 8602 .callback_data = lrp, 8603 }; 8604 int status = 0; 8605 8606 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client, 8607 NFS_SP4_MACH_CRED_PNFS_CLEANUP, 8608 &task_setup_data.rpc_client, &msg); 8609 8610 dprintk("--> %s\n", __func__); 8611 if (!sync) { 8612 lrp->inode = nfs_igrab_and_active(lrp->args.inode); 8613 if (!lrp->inode) { 8614 nfs4_layoutreturn_release(lrp); 8615 return -EAGAIN; 8616 } 8617 task_setup_data.flags |= RPC_TASK_ASYNC; 8618 } 8619 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1); 8620 task = rpc_run_task(&task_setup_data); 8621 if (IS_ERR(task)) 8622 return PTR_ERR(task); 8623 if (sync) 8624 status = task->tk_status; 8625 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status); 8626 dprintk("<-- %s status=%d\n", __func__, status); 8627 rpc_put_task(task); 8628 return status; 8629 } 8630 8631 static int 8632 _nfs4_proc_getdeviceinfo(struct nfs_server *server, 8633 struct pnfs_device *pdev, 8634 struct rpc_cred *cred) 8635 { 8636 struct nfs4_getdeviceinfo_args args = { 8637 .pdev = pdev, 8638 .notify_types = NOTIFY_DEVICEID4_CHANGE | 8639 NOTIFY_DEVICEID4_DELETE, 8640 }; 8641 struct nfs4_getdeviceinfo_res res = { 8642 .pdev = pdev, 8643 }; 8644 struct rpc_message msg = { 8645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO], 8646 .rpc_argp = &args, 8647 .rpc_resp = &res, 8648 .rpc_cred = cred, 8649 }; 8650 int status; 8651 8652 dprintk("--> %s\n", __func__); 8653 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); 8654 if (res.notification & ~args.notify_types) 8655 dprintk("%s: unsupported notification\n", __func__); 8656 if (res.notification != args.notify_types) 8657 pdev->nocache = 1; 8658 8659 dprintk("<-- %s status=%d\n", __func__, status); 8660 8661 return status; 8662 } 8663 8664 int nfs4_proc_getdeviceinfo(struct nfs_server *server, 8665 struct pnfs_device *pdev, 8666 struct rpc_cred *cred) 8667 { 8668 struct nfs4_exception exception = { }; 8669 int err; 8670 8671 do { 8672 err = nfs4_handle_exception(server, 8673 _nfs4_proc_getdeviceinfo(server, pdev, cred), 8674 &exception); 8675 } while (exception.retry); 8676 return err; 8677 } 8678 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo); 8679 8680 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata) 8681 { 8682 struct nfs4_layoutcommit_data *data = calldata; 8683 struct nfs_server *server = NFS_SERVER(data->args.inode); 8684 struct nfs4_session *session = nfs4_get_session(server); 8685 8686 nfs41_setup_sequence(session, 8687 &data->args.seq_args, 8688 &data->res.seq_res, 8689 task); 8690 } 8691 8692 static void 8693 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata) 8694 { 8695 struct nfs4_layoutcommit_data *data = calldata; 8696 struct nfs_server *server = NFS_SERVER(data->args.inode); 8697 8698 if (!nfs41_sequence_done(task, &data->res.seq_res)) 8699 return; 8700 8701 switch (task->tk_status) { /* Just ignore these failures */ 8702 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */ 8703 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */ 8704 case -NFS4ERR_BADLAYOUT: /* no layout */ 8705 case -NFS4ERR_GRACE: /* loca_recalim always false */ 8706 task->tk_status = 0; 8707 case 0: 8708 break; 8709 default: 8710 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) { 8711 rpc_restart_call_prepare(task); 8712 return; 8713 } 8714 } 8715 } 8716 8717 static void nfs4_layoutcommit_release(void *calldata) 8718 { 8719 struct nfs4_layoutcommit_data *data = calldata; 8720 8721 pnfs_cleanup_layoutcommit(data); 8722 nfs_post_op_update_inode_force_wcc(data->args.inode, 8723 data->res.fattr); 8724 put_rpccred(data->cred); 8725 nfs_iput_and_deactive(data->inode); 8726 kfree(data); 8727 } 8728 8729 static const struct rpc_call_ops nfs4_layoutcommit_ops = { 8730 .rpc_call_prepare = nfs4_layoutcommit_prepare, 8731 .rpc_call_done = nfs4_layoutcommit_done, 8732 .rpc_release = nfs4_layoutcommit_release, 8733 }; 8734 8735 int 8736 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync) 8737 { 8738 struct rpc_message msg = { 8739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT], 8740 .rpc_argp = &data->args, 8741 .rpc_resp = &data->res, 8742 .rpc_cred = data->cred, 8743 }; 8744 struct rpc_task_setup task_setup_data = { 8745 .task = &data->task, 8746 .rpc_client = NFS_CLIENT(data->args.inode), 8747 .rpc_message = &msg, 8748 .callback_ops = &nfs4_layoutcommit_ops, 8749 .callback_data = data, 8750 }; 8751 struct rpc_task *task; 8752 int status = 0; 8753 8754 dprintk("NFS: initiating layoutcommit call. sync %d " 8755 "lbw: %llu inode %lu\n", sync, 8756 data->args.lastbytewritten, 8757 data->args.inode->i_ino); 8758 8759 if (!sync) { 8760 data->inode = nfs_igrab_and_active(data->args.inode); 8761 if (data->inode == NULL) { 8762 nfs4_layoutcommit_release(data); 8763 return -EAGAIN; 8764 } 8765 task_setup_data.flags = RPC_TASK_ASYNC; 8766 } 8767 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 8768 task = rpc_run_task(&task_setup_data); 8769 if (IS_ERR(task)) 8770 return PTR_ERR(task); 8771 if (sync) 8772 status = task->tk_status; 8773 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status); 8774 dprintk("%s: status %d\n", __func__, status); 8775 rpc_put_task(task); 8776 return status; 8777 } 8778 8779 /** 8780 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if 8781 * possible) as per RFC3530bis and RFC5661 Security Considerations sections 8782 */ 8783 static int 8784 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 8785 struct nfs_fsinfo *info, 8786 struct nfs4_secinfo_flavors *flavors, bool use_integrity) 8787 { 8788 struct nfs41_secinfo_no_name_args args = { 8789 .style = SECINFO_STYLE_CURRENT_FH, 8790 }; 8791 struct nfs4_secinfo_res res = { 8792 .flavors = flavors, 8793 }; 8794 struct rpc_message msg = { 8795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME], 8796 .rpc_argp = &args, 8797 .rpc_resp = &res, 8798 }; 8799 struct rpc_clnt *clnt = server->client; 8800 struct rpc_cred *cred = NULL; 8801 int status; 8802 8803 if (use_integrity) { 8804 clnt = server->nfs_client->cl_rpcclient; 8805 cred = nfs4_get_clid_cred(server->nfs_client); 8806 msg.rpc_cred = cred; 8807 } 8808 8809 dprintk("--> %s\n", __func__); 8810 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, 8811 &res.seq_res, 0); 8812 dprintk("<-- %s status=%d\n", __func__, status); 8813 8814 if (cred) 8815 put_rpccred(cred); 8816 8817 return status; 8818 } 8819 8820 static int 8821 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle, 8822 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors) 8823 { 8824 struct nfs4_exception exception = { }; 8825 int err; 8826 do { 8827 /* first try using integrity protection */ 8828 err = -NFS4ERR_WRONGSEC; 8829 8830 /* try to use integrity protection with machine cred */ 8831 if (_nfs4_is_integrity_protected(server->nfs_client)) 8832 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 8833 flavors, true); 8834 8835 /* 8836 * if unable to use integrity protection, or SECINFO with 8837 * integrity protection returns NFS4ERR_WRONGSEC (which is 8838 * disallowed by spec, but exists in deployed servers) use 8839 * the current filesystem's rpc_client and the user cred. 8840 */ 8841 if (err == -NFS4ERR_WRONGSEC) 8842 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, 8843 flavors, false); 8844 8845 switch (err) { 8846 case 0: 8847 case -NFS4ERR_WRONGSEC: 8848 case -ENOTSUPP: 8849 goto out; 8850 default: 8851 err = nfs4_handle_exception(server, err, &exception); 8852 } 8853 } while (exception.retry); 8854 out: 8855 return err; 8856 } 8857 8858 static int 8859 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle, 8860 struct nfs_fsinfo *info) 8861 { 8862 int err; 8863 struct page *page; 8864 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR; 8865 struct nfs4_secinfo_flavors *flavors; 8866 struct nfs4_secinfo4 *secinfo; 8867 int i; 8868 8869 page = alloc_page(GFP_KERNEL); 8870 if (!page) { 8871 err = -ENOMEM; 8872 goto out; 8873 } 8874 8875 flavors = page_address(page); 8876 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors); 8877 8878 /* 8879 * Fall back on "guess and check" method if 8880 * the server doesn't support SECINFO_NO_NAME 8881 */ 8882 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) { 8883 err = nfs4_find_root_sec(server, fhandle, info); 8884 goto out_freepage; 8885 } 8886 if (err) 8887 goto out_freepage; 8888 8889 for (i = 0; i < flavors->num_flavors; i++) { 8890 secinfo = &flavors->flavors[i]; 8891 8892 switch (secinfo->flavor) { 8893 case RPC_AUTH_NULL: 8894 case RPC_AUTH_UNIX: 8895 case RPC_AUTH_GSS: 8896 flavor = rpcauth_get_pseudoflavor(secinfo->flavor, 8897 &secinfo->flavor_info); 8898 break; 8899 default: 8900 flavor = RPC_AUTH_MAXFLAVOR; 8901 break; 8902 } 8903 8904 if (!nfs_auth_info_match(&server->auth_info, flavor)) 8905 flavor = RPC_AUTH_MAXFLAVOR; 8906 8907 if (flavor != RPC_AUTH_MAXFLAVOR) { 8908 err = nfs4_lookup_root_sec(server, fhandle, 8909 info, flavor); 8910 if (!err) 8911 break; 8912 } 8913 } 8914 8915 if (flavor == RPC_AUTH_MAXFLAVOR) 8916 err = -EPERM; 8917 8918 out_freepage: 8919 put_page(page); 8920 if (err == -EACCES) 8921 return -EPERM; 8922 out: 8923 return err; 8924 } 8925 8926 static int _nfs41_test_stateid(struct nfs_server *server, 8927 nfs4_stateid *stateid, 8928 struct rpc_cred *cred) 8929 { 8930 int status; 8931 struct nfs41_test_stateid_args args = { 8932 .stateid = stateid, 8933 }; 8934 struct nfs41_test_stateid_res res; 8935 struct rpc_message msg = { 8936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID], 8937 .rpc_argp = &args, 8938 .rpc_resp = &res, 8939 .rpc_cred = cred, 8940 }; 8941 struct rpc_clnt *rpc_client = server->client; 8942 8943 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 8944 &rpc_client, &msg); 8945 8946 dprintk("NFS call test_stateid %p\n", stateid); 8947 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0); 8948 nfs4_set_sequence_privileged(&args.seq_args); 8949 status = nfs4_call_sync_sequence(rpc_client, server, &msg, 8950 &args.seq_args, &res.seq_res); 8951 if (status != NFS_OK) { 8952 dprintk("NFS reply test_stateid: failed, %d\n", status); 8953 return status; 8954 } 8955 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status); 8956 return -res.status; 8957 } 8958 8959 static void nfs4_handle_delay_or_session_error(struct nfs_server *server, 8960 int err, struct nfs4_exception *exception) 8961 { 8962 exception->retry = 0; 8963 switch(err) { 8964 case -NFS4ERR_DELAY: 8965 case -NFS4ERR_RETRY_UNCACHED_REP: 8966 nfs4_handle_exception(server, err, exception); 8967 break; 8968 case -NFS4ERR_BADSESSION: 8969 case -NFS4ERR_BADSLOT: 8970 case -NFS4ERR_BAD_HIGH_SLOT: 8971 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION: 8972 case -NFS4ERR_DEADSESSION: 8973 nfs4_do_handle_exception(server, err, exception); 8974 } 8975 } 8976 8977 /** 8978 * nfs41_test_stateid - perform a TEST_STATEID operation 8979 * 8980 * @server: server / transport on which to perform the operation 8981 * @stateid: state ID to test 8982 * @cred: credential 8983 * 8984 * Returns NFS_OK if the server recognizes that "stateid" is valid. 8985 * Otherwise a negative NFS4ERR value is returned if the operation 8986 * failed or the state ID is not currently valid. 8987 */ 8988 static int nfs41_test_stateid(struct nfs_server *server, 8989 nfs4_stateid *stateid, 8990 struct rpc_cred *cred) 8991 { 8992 struct nfs4_exception exception = { }; 8993 int err; 8994 do { 8995 err = _nfs41_test_stateid(server, stateid, cred); 8996 nfs4_handle_delay_or_session_error(server, err, &exception); 8997 } while (exception.retry); 8998 return err; 8999 } 9000 9001 struct nfs_free_stateid_data { 9002 struct nfs_server *server; 9003 struct nfs41_free_stateid_args args; 9004 struct nfs41_free_stateid_res res; 9005 }; 9006 9007 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata) 9008 { 9009 struct nfs_free_stateid_data *data = calldata; 9010 nfs41_setup_sequence(nfs4_get_session(data->server), 9011 &data->args.seq_args, 9012 &data->res.seq_res, 9013 task); 9014 } 9015 9016 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata) 9017 { 9018 struct nfs_free_stateid_data *data = calldata; 9019 9020 nfs41_sequence_done(task, &data->res.seq_res); 9021 9022 switch (task->tk_status) { 9023 case -NFS4ERR_DELAY: 9024 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN) 9025 rpc_restart_call_prepare(task); 9026 } 9027 } 9028 9029 static void nfs41_free_stateid_release(void *calldata) 9030 { 9031 kfree(calldata); 9032 } 9033 9034 static const struct rpc_call_ops nfs41_free_stateid_ops = { 9035 .rpc_call_prepare = nfs41_free_stateid_prepare, 9036 .rpc_call_done = nfs41_free_stateid_done, 9037 .rpc_release = nfs41_free_stateid_release, 9038 }; 9039 9040 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server, 9041 const nfs4_stateid *stateid, 9042 struct rpc_cred *cred, 9043 bool privileged) 9044 { 9045 struct rpc_message msg = { 9046 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID], 9047 .rpc_cred = cred, 9048 }; 9049 struct rpc_task_setup task_setup = { 9050 .rpc_client = server->client, 9051 .rpc_message = &msg, 9052 .callback_ops = &nfs41_free_stateid_ops, 9053 .flags = RPC_TASK_ASYNC, 9054 }; 9055 struct nfs_free_stateid_data *data; 9056 9057 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID, 9058 &task_setup.rpc_client, &msg); 9059 9060 dprintk("NFS call free_stateid %p\n", stateid); 9061 data = kmalloc(sizeof(*data), GFP_NOFS); 9062 if (!data) 9063 return ERR_PTR(-ENOMEM); 9064 data->server = server; 9065 nfs4_stateid_copy(&data->args.stateid, stateid); 9066 9067 task_setup.callback_data = data; 9068 9069 msg.rpc_argp = &data->args; 9070 msg.rpc_resp = &data->res; 9071 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1); 9072 if (privileged) 9073 nfs4_set_sequence_privileged(&data->args.seq_args); 9074 9075 return rpc_run_task(&task_setup); 9076 } 9077 9078 /** 9079 * nfs41_free_stateid - perform a FREE_STATEID operation 9080 * 9081 * @server: server / transport on which to perform the operation 9082 * @stateid: state ID to release 9083 * @cred: credential 9084 * @is_recovery: set to true if this call needs to be privileged 9085 * 9086 * Note: this function is always asynchronous. 9087 */ 9088 static int nfs41_free_stateid(struct nfs_server *server, 9089 const nfs4_stateid *stateid, 9090 struct rpc_cred *cred, 9091 bool is_recovery) 9092 { 9093 struct rpc_task *task; 9094 9095 task = _nfs41_free_stateid(server, stateid, cred, is_recovery); 9096 if (IS_ERR(task)) 9097 return PTR_ERR(task); 9098 rpc_put_task(task); 9099 return 0; 9100 } 9101 9102 static void 9103 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp) 9104 { 9105 struct rpc_cred *cred = lsp->ls_state->owner->so_cred; 9106 9107 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false); 9108 nfs4_free_lock_state(server, lsp); 9109 } 9110 9111 static bool nfs41_match_stateid(const nfs4_stateid *s1, 9112 const nfs4_stateid *s2) 9113 { 9114 if (s1->type != s2->type) 9115 return false; 9116 9117 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0) 9118 return false; 9119 9120 if (s1->seqid == s2->seqid) 9121 return true; 9122 if (s1->seqid == 0 || s2->seqid == 0) 9123 return true; 9124 9125 return false; 9126 } 9127 9128 #endif /* CONFIG_NFS_V4_1 */ 9129 9130 static bool nfs4_match_stateid(const nfs4_stateid *s1, 9131 const nfs4_stateid *s2) 9132 { 9133 return nfs4_stateid_match(s1, s2); 9134 } 9135 9136 9137 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = { 9138 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 9139 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 9140 .recover_open = nfs4_open_reclaim, 9141 .recover_lock = nfs4_lock_reclaim, 9142 .establish_clid = nfs4_init_clientid, 9143 .detect_trunking = nfs40_discover_server_trunking, 9144 }; 9145 9146 #if defined(CONFIG_NFS_V4_1) 9147 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = { 9148 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT, 9149 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT, 9150 .recover_open = nfs4_open_reclaim, 9151 .recover_lock = nfs4_lock_reclaim, 9152 .establish_clid = nfs41_init_clientid, 9153 .reclaim_complete = nfs41_proc_reclaim_complete, 9154 .detect_trunking = nfs41_discover_server_trunking, 9155 }; 9156 #endif /* CONFIG_NFS_V4_1 */ 9157 9158 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = { 9159 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 9160 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 9161 .recover_open = nfs40_open_expired, 9162 .recover_lock = nfs4_lock_expired, 9163 .establish_clid = nfs4_init_clientid, 9164 }; 9165 9166 #if defined(CONFIG_NFS_V4_1) 9167 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = { 9168 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE, 9169 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE, 9170 .recover_open = nfs41_open_expired, 9171 .recover_lock = nfs41_lock_expired, 9172 .establish_clid = nfs41_init_clientid, 9173 }; 9174 #endif /* CONFIG_NFS_V4_1 */ 9175 9176 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = { 9177 .sched_state_renewal = nfs4_proc_async_renew, 9178 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked, 9179 .renew_lease = nfs4_proc_renew, 9180 }; 9181 9182 #if defined(CONFIG_NFS_V4_1) 9183 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = { 9184 .sched_state_renewal = nfs41_proc_async_sequence, 9185 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked, 9186 .renew_lease = nfs4_proc_sequence, 9187 }; 9188 #endif 9189 9190 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = { 9191 .get_locations = _nfs40_proc_get_locations, 9192 .fsid_present = _nfs40_proc_fsid_present, 9193 }; 9194 9195 #if defined(CONFIG_NFS_V4_1) 9196 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = { 9197 .get_locations = _nfs41_proc_get_locations, 9198 .fsid_present = _nfs41_proc_fsid_present, 9199 }; 9200 #endif /* CONFIG_NFS_V4_1 */ 9201 9202 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = { 9203 .minor_version = 0, 9204 .init_caps = NFS_CAP_READDIRPLUS 9205 | NFS_CAP_ATOMIC_OPEN 9206 | NFS_CAP_POSIX_LOCK, 9207 .init_client = nfs40_init_client, 9208 .shutdown_client = nfs40_shutdown_client, 9209 .match_stateid = nfs4_match_stateid, 9210 .find_root_sec = nfs4_find_root_sec, 9211 .free_lock_state = nfs4_release_lockowner, 9212 .test_and_free_expired = nfs40_test_and_free_expired_stateid, 9213 .alloc_seqid = nfs_alloc_seqid, 9214 .call_sync_ops = &nfs40_call_sync_ops, 9215 .reboot_recovery_ops = &nfs40_reboot_recovery_ops, 9216 .nograce_recovery_ops = &nfs40_nograce_recovery_ops, 9217 .state_renewal_ops = &nfs40_state_renewal_ops, 9218 .mig_recovery_ops = &nfs40_mig_recovery_ops, 9219 }; 9220 9221 #if defined(CONFIG_NFS_V4_1) 9222 static struct nfs_seqid * 9223 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2) 9224 { 9225 return NULL; 9226 } 9227 9228 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = { 9229 .minor_version = 1, 9230 .init_caps = NFS_CAP_READDIRPLUS 9231 | NFS_CAP_ATOMIC_OPEN 9232 | NFS_CAP_POSIX_LOCK 9233 | NFS_CAP_STATEID_NFSV41 9234 | NFS_CAP_ATOMIC_OPEN_V1, 9235 .init_client = nfs41_init_client, 9236 .shutdown_client = nfs41_shutdown_client, 9237 .match_stateid = nfs41_match_stateid, 9238 .find_root_sec = nfs41_find_root_sec, 9239 .free_lock_state = nfs41_free_lock_state, 9240 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 9241 .alloc_seqid = nfs_alloc_no_seqid, 9242 .session_trunk = nfs4_test_session_trunk, 9243 .call_sync_ops = &nfs41_call_sync_ops, 9244 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 9245 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 9246 .state_renewal_ops = &nfs41_state_renewal_ops, 9247 .mig_recovery_ops = &nfs41_mig_recovery_ops, 9248 }; 9249 #endif 9250 9251 #if defined(CONFIG_NFS_V4_2) 9252 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = { 9253 .minor_version = 2, 9254 .init_caps = NFS_CAP_READDIRPLUS 9255 | NFS_CAP_ATOMIC_OPEN 9256 | NFS_CAP_POSIX_LOCK 9257 | NFS_CAP_STATEID_NFSV41 9258 | NFS_CAP_ATOMIC_OPEN_V1 9259 | NFS_CAP_ALLOCATE 9260 | NFS_CAP_COPY 9261 | NFS_CAP_DEALLOCATE 9262 | NFS_CAP_SEEK 9263 | NFS_CAP_LAYOUTSTATS 9264 | NFS_CAP_CLONE, 9265 .init_client = nfs41_init_client, 9266 .shutdown_client = nfs41_shutdown_client, 9267 .match_stateid = nfs41_match_stateid, 9268 .find_root_sec = nfs41_find_root_sec, 9269 .free_lock_state = nfs41_free_lock_state, 9270 .call_sync_ops = &nfs41_call_sync_ops, 9271 .test_and_free_expired = nfs41_test_and_free_expired_stateid, 9272 .alloc_seqid = nfs_alloc_no_seqid, 9273 .session_trunk = nfs4_test_session_trunk, 9274 .reboot_recovery_ops = &nfs41_reboot_recovery_ops, 9275 .nograce_recovery_ops = &nfs41_nograce_recovery_ops, 9276 .state_renewal_ops = &nfs41_state_renewal_ops, 9277 .mig_recovery_ops = &nfs41_mig_recovery_ops, 9278 }; 9279 #endif 9280 9281 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = { 9282 [0] = &nfs_v4_0_minor_ops, 9283 #if defined(CONFIG_NFS_V4_1) 9284 [1] = &nfs_v4_1_minor_ops, 9285 #endif 9286 #if defined(CONFIG_NFS_V4_2) 9287 [2] = &nfs_v4_2_minor_ops, 9288 #endif 9289 }; 9290 9291 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size) 9292 { 9293 ssize_t error, error2; 9294 9295 error = generic_listxattr(dentry, list, size); 9296 if (error < 0) 9297 return error; 9298 if (list) { 9299 list += error; 9300 size -= error; 9301 } 9302 9303 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size); 9304 if (error2 < 0) 9305 return error2; 9306 return error + error2; 9307 } 9308 9309 static const struct inode_operations nfs4_dir_inode_operations = { 9310 .create = nfs_create, 9311 .lookup = nfs_lookup, 9312 .atomic_open = nfs_atomic_open, 9313 .link = nfs_link, 9314 .unlink = nfs_unlink, 9315 .symlink = nfs_symlink, 9316 .mkdir = nfs_mkdir, 9317 .rmdir = nfs_rmdir, 9318 .mknod = nfs_mknod, 9319 .rename = nfs_rename, 9320 .permission = nfs_permission, 9321 .getattr = nfs_getattr, 9322 .setattr = nfs_setattr, 9323 .listxattr = nfs4_listxattr, 9324 }; 9325 9326 static const struct inode_operations nfs4_file_inode_operations = { 9327 .permission = nfs_permission, 9328 .getattr = nfs_getattr, 9329 .setattr = nfs_setattr, 9330 .listxattr = nfs4_listxattr, 9331 }; 9332 9333 const struct nfs_rpc_ops nfs_v4_clientops = { 9334 .version = 4, /* protocol version */ 9335 .dentry_ops = &nfs4_dentry_operations, 9336 .dir_inode_ops = &nfs4_dir_inode_operations, 9337 .file_inode_ops = &nfs4_file_inode_operations, 9338 .file_ops = &nfs4_file_operations, 9339 .getroot = nfs4_proc_get_root, 9340 .submount = nfs4_submount, 9341 .try_mount = nfs4_try_mount, 9342 .getattr = nfs4_proc_getattr, 9343 .setattr = nfs4_proc_setattr, 9344 .lookup = nfs4_proc_lookup, 9345 .access = nfs4_proc_access, 9346 .readlink = nfs4_proc_readlink, 9347 .create = nfs4_proc_create, 9348 .remove = nfs4_proc_remove, 9349 .unlink_setup = nfs4_proc_unlink_setup, 9350 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare, 9351 .unlink_done = nfs4_proc_unlink_done, 9352 .rename_setup = nfs4_proc_rename_setup, 9353 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare, 9354 .rename_done = nfs4_proc_rename_done, 9355 .link = nfs4_proc_link, 9356 .symlink = nfs4_proc_symlink, 9357 .mkdir = nfs4_proc_mkdir, 9358 .rmdir = nfs4_proc_remove, 9359 .readdir = nfs4_proc_readdir, 9360 .mknod = nfs4_proc_mknod, 9361 .statfs = nfs4_proc_statfs, 9362 .fsinfo = nfs4_proc_fsinfo, 9363 .pathconf = nfs4_proc_pathconf, 9364 .set_capabilities = nfs4_server_capabilities, 9365 .decode_dirent = nfs4_decode_dirent, 9366 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare, 9367 .read_setup = nfs4_proc_read_setup, 9368 .read_done = nfs4_read_done, 9369 .write_setup = nfs4_proc_write_setup, 9370 .write_done = nfs4_write_done, 9371 .commit_setup = nfs4_proc_commit_setup, 9372 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare, 9373 .commit_done = nfs4_commit_done, 9374 .lock = nfs4_proc_lock, 9375 .clear_acl_cache = nfs4_zap_acl_attr, 9376 .close_context = nfs4_close_context, 9377 .open_context = nfs4_atomic_open, 9378 .have_delegation = nfs4_have_delegation, 9379 .return_delegation = nfs4_inode_return_delegation, 9380 .alloc_client = nfs4_alloc_client, 9381 .init_client = nfs4_init_client, 9382 .free_client = nfs4_free_client, 9383 .create_server = nfs4_create_server, 9384 .clone_server = nfs_clone_server, 9385 }; 9386 9387 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = { 9388 .name = XATTR_NAME_NFSV4_ACL, 9389 .list = nfs4_xattr_list_nfs4_acl, 9390 .get = nfs4_xattr_get_nfs4_acl, 9391 .set = nfs4_xattr_set_nfs4_acl, 9392 }; 9393 9394 const struct xattr_handler *nfs4_xattr_handlers[] = { 9395 &nfs4_xattr_nfs4_acl_handler, 9396 #ifdef CONFIG_NFS_V4_SECURITY_LABEL 9397 &nfs4_xattr_nfs4_label_handler, 9398 #endif 9399 NULL 9400 }; 9401 9402 /* 9403 * Local variables: 9404 * c-basic-offset: 8 9405 * End: 9406 */ 9407