4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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.
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.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/xattr.h>
55 #include <linux/utsname.h>
56 #include <linux/freezer.h>
59 #include "delegation.h"
65 #include "nfs4idmap.h"
66 #include "nfs4session.h"
69 #include "nfs4trace.h"
71 #define NFSDBG_FACILITY NFSDBG_PROC
73 #define NFS4_POLL_RETRY_MIN (HZ/10)
74 #define NFS4_POLL_RETRY_MAX (15*HZ)
76 /* file attributes which can be mapped to nfs attributes */
77 #define NFS4_VALID_ATTRS (ATTR_MODE \
88 static int _nfs4_proc_open(struct nfs4_opendata *data);
89 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
90 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
91 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
92 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
93 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
94 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
95 struct nfs_fattr *fattr, struct iattr *sattr,
96 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
97 struct nfs4_label *olabel);
98 #ifdef CONFIG_NFS_V4_1
99 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
101 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
102 struct rpc_cred *, bool);
105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
106 static inline struct nfs4_label *
107 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
108 struct iattr *sattr, struct nfs4_label *label)
115 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
118 err = security_dentry_init_security(dentry, sattr->ia_mode,
119 &dentry->d_name, (void **)&label->label, &label->len);
126 nfs4_label_release_security(struct nfs4_label *label)
129 security_release_secctx(label->label, label->len);
131 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
134 return server->attr_bitmask;
136 return server->attr_bitmask_nl;
139 static inline struct nfs4_label *
140 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
141 struct iattr *sattr, struct nfs4_label *l)
144 nfs4_label_release_security(struct nfs4_label *label)
147 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
148 { return server->attr_bitmask; }
151 /* Prevent leaks of NFSv4 errors into userland */
152 static int nfs4_map_errors(int err)
157 case -NFS4ERR_RESOURCE:
158 case -NFS4ERR_LAYOUTTRYLATER:
159 case -NFS4ERR_RECALLCONFLICT:
161 case -NFS4ERR_WRONGSEC:
162 case -NFS4ERR_WRONG_CRED:
164 case -NFS4ERR_BADOWNER:
165 case -NFS4ERR_BADNAME:
167 case -NFS4ERR_SHARE_DENIED:
169 case -NFS4ERR_MINOR_VERS_MISMATCH:
170 return -EPROTONOSUPPORT;
171 case -NFS4ERR_FILE_OPEN:
174 dprintk("%s could not handle NFSv4 error %d\n",
182 * This is our standard bitmap for GETATTR requests.
184 const u32 nfs4_fattr_bitmap[3] = {
186 | FATTR4_WORD0_CHANGE
189 | FATTR4_WORD0_FILEID,
191 | FATTR4_WORD1_NUMLINKS
193 | FATTR4_WORD1_OWNER_GROUP
194 | FATTR4_WORD1_RAWDEV
195 | FATTR4_WORD1_SPACE_USED
196 | FATTR4_WORD1_TIME_ACCESS
197 | FATTR4_WORD1_TIME_METADATA
198 | FATTR4_WORD1_TIME_MODIFY
199 | FATTR4_WORD1_MOUNTED_ON_FILEID,
200 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
201 FATTR4_WORD2_SECURITY_LABEL
205 static const u32 nfs4_pnfs_open_bitmap[3] = {
207 | FATTR4_WORD0_CHANGE
210 | FATTR4_WORD0_FILEID,
212 | FATTR4_WORD1_NUMLINKS
214 | FATTR4_WORD1_OWNER_GROUP
215 | FATTR4_WORD1_RAWDEV
216 | FATTR4_WORD1_SPACE_USED
217 | FATTR4_WORD1_TIME_ACCESS
218 | FATTR4_WORD1_TIME_METADATA
219 | FATTR4_WORD1_TIME_MODIFY,
220 FATTR4_WORD2_MDSTHRESHOLD
221 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
222 | FATTR4_WORD2_SECURITY_LABEL
226 static const u32 nfs4_open_noattr_bitmap[3] = {
228 | FATTR4_WORD0_FILEID,
231 const u32 nfs4_statfs_bitmap[3] = {
232 FATTR4_WORD0_FILES_AVAIL
233 | FATTR4_WORD0_FILES_FREE
234 | FATTR4_WORD0_FILES_TOTAL,
235 FATTR4_WORD1_SPACE_AVAIL
236 | FATTR4_WORD1_SPACE_FREE
237 | FATTR4_WORD1_SPACE_TOTAL
240 const u32 nfs4_pathconf_bitmap[3] = {
242 | FATTR4_WORD0_MAXNAME,
246 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
247 | FATTR4_WORD0_MAXREAD
248 | FATTR4_WORD0_MAXWRITE
249 | FATTR4_WORD0_LEASE_TIME,
250 FATTR4_WORD1_TIME_DELTA
251 | FATTR4_WORD1_FS_LAYOUT_TYPES,
252 FATTR4_WORD2_LAYOUT_BLKSIZE
253 | FATTR4_WORD2_CLONE_BLKSIZE
256 const u32 nfs4_fs_locations_bitmap[3] = {
258 | FATTR4_WORD0_CHANGE
261 | FATTR4_WORD0_FILEID
262 | FATTR4_WORD0_FS_LOCATIONS,
264 | FATTR4_WORD1_NUMLINKS
266 | FATTR4_WORD1_OWNER_GROUP
267 | FATTR4_WORD1_RAWDEV
268 | FATTR4_WORD1_SPACE_USED
269 | FATTR4_WORD1_TIME_ACCESS
270 | FATTR4_WORD1_TIME_METADATA
271 | FATTR4_WORD1_TIME_MODIFY
272 | FATTR4_WORD1_MOUNTED_ON_FILEID,
275 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
276 struct nfs4_readdir_arg *readdir)
281 readdir->cookie = cookie;
282 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
287 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
292 * NFSv4 servers do not return entries for '.' and '..'
293 * Therefore, we fake these entries here. We let '.'
294 * have cookie 0 and '..' have cookie 1. Note that
295 * when talking to the server, we always send cookie 0
298 start = p = kmap_atomic(*readdir->pages);
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_one; /* cookie, second word */
304 *p++ = xdr_one; /* entry len */
305 memcpy(p, ".\0\0\0", 4); /* entry */
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
313 *p++ = xdr_one; /* next */
314 *p++ = xdr_zero; /* cookie, first word */
315 *p++ = xdr_two; /* cookie, second word */
316 *p++ = xdr_two; /* entry len */
317 memcpy(p, "..\0\0", 4); /* entry */
319 *p++ = xdr_one; /* bitmap length */
320 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
321 *p++ = htonl(8); /* attribute buffer length */
322 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
324 readdir->pgbase = (char *)p - (char *)start;
325 readdir->count -= readdir->pgbase;
326 kunmap_atomic(start);
329 static void nfs4_test_and_free_stateid(struct nfs_server *server,
330 nfs4_stateid *stateid,
331 struct rpc_cred *cred)
333 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
335 ops->test_and_free_expired(server, stateid, cred);
338 static void __nfs4_free_revoked_stateid(struct nfs_server *server,
339 nfs4_stateid *stateid,
340 struct rpc_cred *cred)
342 stateid->type = NFS4_REVOKED_STATEID_TYPE;
343 nfs4_test_and_free_stateid(server, stateid, cred);
346 static void nfs4_free_revoked_stateid(struct nfs_server *server,
347 const nfs4_stateid *stateid,
348 struct rpc_cred *cred)
352 nfs4_stateid_copy(&tmp, stateid);
353 __nfs4_free_revoked_stateid(server, &tmp, cred);
356 static long nfs4_update_delay(long *timeout)
360 return NFS4_POLL_RETRY_MAX;
362 *timeout = NFS4_POLL_RETRY_MIN;
363 if (*timeout > NFS4_POLL_RETRY_MAX)
364 *timeout = NFS4_POLL_RETRY_MAX;
370 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
376 freezable_schedule_timeout_killable_unsafe(
377 nfs4_update_delay(timeout));
378 if (fatal_signal_pending(current))
383 /* This is the error handling routine for processes that are allowed
386 static int nfs4_do_handle_exception(struct nfs_server *server,
387 int errorcode, struct nfs4_exception *exception)
389 struct nfs_client *clp = server->nfs_client;
390 struct nfs4_state *state = exception->state;
391 const nfs4_stateid *stateid = exception->stateid;
392 struct inode *inode = exception->inode;
395 exception->delay = 0;
396 exception->recovering = 0;
397 exception->retry = 0;
399 if (stateid == NULL && state != NULL)
400 stateid = &state->stateid;
405 case -NFS4ERR_DELEG_REVOKED:
406 case -NFS4ERR_ADMIN_REVOKED:
407 case -NFS4ERR_EXPIRED:
408 case -NFS4ERR_BAD_STATEID:
409 if (inode != NULL && stateid != NULL) {
410 nfs_inode_find_state_and_recover(inode,
412 goto wait_on_recovery;
414 case -NFS4ERR_OPENMODE:
418 err = nfs_async_inode_return_delegation(inode,
421 goto wait_on_recovery;
422 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
423 exception->retry = 1;
429 ret = nfs4_schedule_stateid_recovery(server, state);
432 goto wait_on_recovery;
433 case -NFS4ERR_STALE_STATEID:
434 case -NFS4ERR_STALE_CLIENTID:
435 nfs4_schedule_lease_recovery(clp);
436 goto wait_on_recovery;
438 ret = nfs4_schedule_migration_recovery(server);
441 goto wait_on_recovery;
442 case -NFS4ERR_LEASE_MOVED:
443 nfs4_schedule_lease_moved_recovery(clp);
444 goto wait_on_recovery;
445 #if defined(CONFIG_NFS_V4_1)
446 case -NFS4ERR_BADSESSION:
447 case -NFS4ERR_BADSLOT:
448 case -NFS4ERR_BAD_HIGH_SLOT:
449 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
450 case -NFS4ERR_DEADSESSION:
451 case -NFS4ERR_SEQ_FALSE_RETRY:
452 case -NFS4ERR_SEQ_MISORDERED:
453 dprintk("%s ERROR: %d Reset session\n", __func__,
455 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
456 goto wait_on_recovery;
457 #endif /* defined(CONFIG_NFS_V4_1) */
458 case -NFS4ERR_FILE_OPEN:
459 if (exception->timeout > HZ) {
460 /* We have retried a decent amount, time to
467 nfs_inc_server_stats(server, NFSIOS_DELAY);
469 case -NFS4ERR_LAYOUTTRYLATER:
470 case -NFS4ERR_RECALLCONFLICT:
471 exception->delay = 1;
474 case -NFS4ERR_RETRY_UNCACHED_REP:
475 case -NFS4ERR_OLD_STATEID:
476 exception->retry = 1;
478 case -NFS4ERR_BADOWNER:
479 /* The following works around a Linux server bug! */
480 case -NFS4ERR_BADNAME:
481 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
482 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
483 exception->retry = 1;
484 printk(KERN_WARNING "NFS: v4 server %s "
485 "does not accept raw "
487 "Reenabling the idmapper.\n",
488 server->nfs_client->cl_hostname);
491 /* We failed to handle the error */
492 return nfs4_map_errors(ret);
494 exception->recovering = 1;
498 /* This is the error handling routine for processes that are allowed
501 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
503 struct nfs_client *clp = server->nfs_client;
506 ret = nfs4_do_handle_exception(server, errorcode, exception);
507 if (exception->delay) {
508 ret = nfs4_delay(server->client, &exception->timeout);
511 if (exception->recovering) {
512 ret = nfs4_wait_clnt_recover(clp);
513 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
520 exception->retry = 1;
525 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
526 int errorcode, struct nfs4_exception *exception)
528 struct nfs_client *clp = server->nfs_client;
531 ret = nfs4_do_handle_exception(server, errorcode, exception);
532 if (exception->delay) {
533 rpc_delay(task, nfs4_update_delay(&exception->timeout));
536 if (exception->recovering) {
537 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
538 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
539 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
542 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
547 exception->retry = 1;
552 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
553 struct nfs4_state *state, long *timeout)
555 struct nfs4_exception exception = {
559 if (task->tk_status >= 0)
562 exception.timeout = *timeout;
563 task->tk_status = nfs4_async_handle_exception(task, server,
566 if (exception.delay && timeout)
567 *timeout = exception.timeout;
574 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
575 * or 'false' otherwise.
577 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
579 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
581 if (flavor == RPC_AUTH_GSS_KRB5I ||
582 flavor == RPC_AUTH_GSS_KRB5P)
588 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
590 spin_lock(&clp->cl_lock);
591 if (time_before(clp->cl_last_renewal,timestamp))
592 clp->cl_last_renewal = timestamp;
593 spin_unlock(&clp->cl_lock);
596 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
598 struct nfs_client *clp = server->nfs_client;
600 if (!nfs4_has_session(clp))
601 do_renew_lease(clp, timestamp);
604 struct nfs4_call_sync_data {
605 const struct nfs_server *seq_server;
606 struct nfs4_sequence_args *seq_args;
607 struct nfs4_sequence_res *seq_res;
610 void nfs4_init_sequence(struct nfs4_sequence_args *args,
611 struct nfs4_sequence_res *res, int cache_reply)
613 args->sa_slot = NULL;
614 args->sa_cache_this = cache_reply;
615 args->sa_privileged = 0;
620 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
622 args->sa_privileged = 1;
625 int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
626 struct nfs4_sequence_args *args,
627 struct nfs4_sequence_res *res,
628 struct rpc_task *task)
630 struct nfs4_slot *slot;
632 /* slot already allocated? */
633 if (res->sr_slot != NULL)
636 spin_lock(&tbl->slot_tbl_lock);
637 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
640 slot = nfs4_alloc_slot(tbl);
642 if (slot == ERR_PTR(-ENOMEM))
643 task->tk_timeout = HZ >> 2;
646 spin_unlock(&tbl->slot_tbl_lock);
648 slot->privileged = args->sa_privileged ? 1 : 0;
649 args->sa_slot = slot;
653 rpc_call_start(task);
657 if (args->sa_privileged)
658 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
659 NULL, RPC_PRIORITY_PRIVILEGED);
661 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
662 spin_unlock(&tbl->slot_tbl_lock);
665 EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
667 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
669 struct nfs4_slot *slot = res->sr_slot;
670 struct nfs4_slot_table *tbl;
673 spin_lock(&tbl->slot_tbl_lock);
674 if (!nfs41_wake_and_assign_slot(tbl, slot))
675 nfs4_free_slot(tbl, slot);
676 spin_unlock(&tbl->slot_tbl_lock);
681 static int nfs40_sequence_done(struct rpc_task *task,
682 struct nfs4_sequence_res *res)
684 if (res->sr_slot != NULL)
685 nfs40_sequence_free_slot(res);
689 #if defined(CONFIG_NFS_V4_1)
691 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
693 struct nfs4_session *session;
694 struct nfs4_slot_table *tbl;
695 struct nfs4_slot *slot = res->sr_slot;
696 bool send_new_highest_used_slotid = false;
699 session = tbl->session;
701 /* Bump the slot sequence number */
706 spin_lock(&tbl->slot_tbl_lock);
707 /* Be nice to the server: try to ensure that the last transmitted
708 * value for highest_user_slotid <= target_highest_slotid
710 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
711 send_new_highest_used_slotid = true;
713 if (nfs41_wake_and_assign_slot(tbl, slot)) {
714 send_new_highest_used_slotid = false;
717 nfs4_free_slot(tbl, slot);
719 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
720 send_new_highest_used_slotid = false;
722 spin_unlock(&tbl->slot_tbl_lock);
724 if (send_new_highest_used_slotid)
725 nfs41_notify_server(session->clp);
726 if (waitqueue_active(&tbl->slot_waitq))
727 wake_up_all(&tbl->slot_waitq);
730 static int nfs41_sequence_process(struct rpc_task *task,
731 struct nfs4_sequence_res *res)
733 struct nfs4_session *session;
734 struct nfs4_slot *slot = res->sr_slot;
735 struct nfs_client *clp;
736 bool interrupted = false;
741 /* don't increment the sequence number if the task wasn't sent */
742 if (!RPC_WAS_SENT(task))
745 session = slot->table->session;
747 if (slot->interrupted) {
748 slot->interrupted = 0;
752 trace_nfs4_sequence_done(session, res);
753 /* Check the SEQUENCE operation status */
754 switch (res->sr_status) {
756 /* If previous op on slot was interrupted and we reused
757 * the seq# and got a reply from the cache, then retry
759 if (task->tk_status == -EREMOTEIO && interrupted) {
763 /* Update the slot's sequence and clientid lease timer */
766 do_renew_lease(clp, res->sr_timestamp);
767 /* Check sequence flags */
768 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
770 nfs41_update_target_slotid(slot->table, slot, res);
774 * sr_status remains 1 if an RPC level error occurred.
775 * The server may or may not have processed the sequence
777 * Mark the slot as having hosted an interrupted RPC call.
779 slot->interrupted = 1;
782 /* The server detected a resend of the RPC call and
783 * returned NFS4ERR_DELAY as per Section 2.10.6.2
786 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
791 case -NFS4ERR_BADSLOT:
793 * The slot id we used was probably retired. Try again
794 * using a different slot id.
797 case -NFS4ERR_SEQ_MISORDERED:
799 * Was the last operation on this sequence interrupted?
800 * If so, retry after bumping the sequence number.
807 * Could this slot have been previously retired?
808 * If so, then the server may be expecting seq_nr = 1!
810 if (slot->seq_nr != 1) {
815 case -NFS4ERR_SEQ_FALSE_RETRY:
818 case -NFS4ERR_DEADSESSION:
819 case -NFS4ERR_BADSESSION:
820 nfs4_schedule_session_recovery(session, res->sr_status);
823 /* Just update the slot sequence no. */
827 /* The session may be reset by one of the error handlers. */
828 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
832 if (rpc_restart_call_prepare(task)) {
833 nfs41_sequence_free_slot(res);
839 if (!rpc_restart_call(task))
841 rpc_delay(task, NFS4_POLL_RETRY_MAX);
845 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
847 if (!nfs41_sequence_process(task, res))
849 if (res->sr_slot != NULL)
850 nfs41_sequence_free_slot(res);
854 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
856 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
858 if (res->sr_slot == NULL)
860 if (res->sr_slot->table->session != NULL)
861 return nfs41_sequence_process(task, res);
862 return nfs40_sequence_done(task, res);
865 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
867 if (res->sr_slot != NULL) {
868 if (res->sr_slot->table->session != NULL)
869 nfs41_sequence_free_slot(res);
871 nfs40_sequence_free_slot(res);
875 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
877 if (res->sr_slot == NULL)
879 if (!res->sr_slot->table->session)
880 return nfs40_sequence_done(task, res);
881 return nfs41_sequence_done(task, res);
883 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
885 int nfs41_setup_sequence(struct nfs4_session *session,
886 struct nfs4_sequence_args *args,
887 struct nfs4_sequence_res *res,
888 struct rpc_task *task)
890 struct nfs4_slot *slot;
891 struct nfs4_slot_table *tbl;
893 dprintk("--> %s\n", __func__);
894 /* slot already allocated? */
895 if (res->sr_slot != NULL)
898 tbl = &session->fc_slot_table;
900 task->tk_timeout = 0;
902 spin_lock(&tbl->slot_tbl_lock);
903 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
904 !args->sa_privileged) {
905 /* The state manager will wait until the slot table is empty */
906 dprintk("%s session is draining\n", __func__);
910 slot = nfs4_alloc_slot(tbl);
912 /* If out of memory, try again in 1/4 second */
913 if (slot == ERR_PTR(-ENOMEM))
914 task->tk_timeout = HZ >> 2;
915 dprintk("<-- %s: no free slots\n", __func__);
918 spin_unlock(&tbl->slot_tbl_lock);
920 slot->privileged = args->sa_privileged ? 1 : 0;
921 args->sa_slot = slot;
923 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
924 slot->slot_nr, slot->seq_nr);
927 res->sr_timestamp = jiffies;
928 res->sr_status_flags = 0;
930 * sr_status is only set in decode_sequence, and so will remain
931 * set to 1 if an rpc level failure occurs.
934 trace_nfs4_setup_sequence(session, args);
936 rpc_call_start(task);
939 /* Privileged tasks are queued with top priority */
940 if (args->sa_privileged)
941 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
942 NULL, RPC_PRIORITY_PRIVILEGED);
944 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
945 spin_unlock(&tbl->slot_tbl_lock);
948 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
950 static int nfs4_setup_sequence(const struct nfs_server *server,
951 struct nfs4_sequence_args *args,
952 struct nfs4_sequence_res *res,
953 struct rpc_task *task)
955 struct nfs4_session *session = nfs4_get_session(server);
959 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
962 dprintk("--> %s clp %p session %p sr_slot %u\n",
963 __func__, session->clp, session, res->sr_slot ?
964 res->sr_slot->slot_nr : NFS4_NO_SLOT);
966 ret = nfs41_setup_sequence(session, args, res, task);
968 dprintk("<-- %s status=%d\n", __func__, ret);
972 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
974 struct nfs4_call_sync_data *data = calldata;
975 struct nfs4_session *session = nfs4_get_session(data->seq_server);
977 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
979 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
982 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
984 struct nfs4_call_sync_data *data = calldata;
986 nfs41_sequence_done(task, data->seq_res);
989 static const struct rpc_call_ops nfs41_call_sync_ops = {
990 .rpc_call_prepare = nfs41_call_sync_prepare,
991 .rpc_call_done = nfs41_call_sync_done,
994 #else /* !CONFIG_NFS_V4_1 */
996 static int nfs4_setup_sequence(const struct nfs_server *server,
997 struct nfs4_sequence_args *args,
998 struct nfs4_sequence_res *res,
999 struct rpc_task *task)
1001 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
1005 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
1007 return nfs40_sequence_done(task, res);
1010 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
1012 if (res->sr_slot != NULL)
1013 nfs40_sequence_free_slot(res);
1016 int nfs4_sequence_done(struct rpc_task *task,
1017 struct nfs4_sequence_res *res)
1019 return nfs40_sequence_done(task, res);
1021 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
1023 #endif /* !CONFIG_NFS_V4_1 */
1025 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1027 struct nfs4_call_sync_data *data = calldata;
1028 nfs4_setup_sequence(data->seq_server,
1029 data->seq_args, data->seq_res, task);
1032 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1034 struct nfs4_call_sync_data *data = calldata;
1035 nfs4_sequence_done(task, data->seq_res);
1038 static const struct rpc_call_ops nfs40_call_sync_ops = {
1039 .rpc_call_prepare = nfs40_call_sync_prepare,
1040 .rpc_call_done = nfs40_call_sync_done,
1043 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1044 struct nfs_server *server,
1045 struct rpc_message *msg,
1046 struct nfs4_sequence_args *args,
1047 struct nfs4_sequence_res *res)
1050 struct rpc_task *task;
1051 struct nfs_client *clp = server->nfs_client;
1052 struct nfs4_call_sync_data data = {
1053 .seq_server = server,
1057 struct rpc_task_setup task_setup = {
1060 .callback_ops = clp->cl_mvops->call_sync_ops,
1061 .callback_data = &data
1064 task = rpc_run_task(&task_setup);
1066 ret = PTR_ERR(task);
1068 ret = task->tk_status;
1074 int nfs4_call_sync(struct rpc_clnt *clnt,
1075 struct nfs_server *server,
1076 struct rpc_message *msg,
1077 struct nfs4_sequence_args *args,
1078 struct nfs4_sequence_res *res,
1081 nfs4_init_sequence(args, res, cache_reply);
1082 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
1085 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
1086 unsigned long timestamp)
1088 struct nfs_inode *nfsi = NFS_I(dir);
1090 spin_lock(&dir->i_lock);
1091 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1092 if (cinfo->atomic && cinfo->before == dir->i_version) {
1093 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1094 nfsi->attrtimeo_timestamp = jiffies;
1096 nfs_force_lookup_revalidate(dir);
1097 if (cinfo->before != dir->i_version)
1098 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1099 NFS_INO_INVALID_ACL;
1101 dir->i_version = cinfo->after;
1102 nfsi->read_cache_jiffies = timestamp;
1103 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1104 nfs_fscache_invalidate(dir);
1105 spin_unlock(&dir->i_lock);
1108 struct nfs4_opendata {
1110 struct nfs_openargs o_arg;
1111 struct nfs_openres o_res;
1112 struct nfs_open_confirmargs c_arg;
1113 struct nfs_open_confirmres c_res;
1114 struct nfs4_string owner_name;
1115 struct nfs4_string group_name;
1116 struct nfs4_label *a_label;
1117 struct nfs_fattr f_attr;
1118 struct nfs4_label *f_label;
1120 struct dentry *dentry;
1121 struct nfs4_state_owner *owner;
1122 struct nfs4_state *state;
1124 unsigned long timestamp;
1125 unsigned int rpc_done : 1;
1126 unsigned int file_created : 1;
1127 unsigned int is_recover : 1;
1132 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1133 int err, struct nfs4_exception *exception)
1137 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1139 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1140 exception->retry = 1;
1145 nfs4_map_atomic_open_share(struct nfs_server *server,
1146 fmode_t fmode, int openflags)
1150 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1152 res = NFS4_SHARE_ACCESS_READ;
1155 res = NFS4_SHARE_ACCESS_WRITE;
1157 case FMODE_READ|FMODE_WRITE:
1158 res = NFS4_SHARE_ACCESS_BOTH;
1160 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1162 /* Want no delegation if we're using O_DIRECT */
1163 if (openflags & O_DIRECT)
1164 res |= NFS4_SHARE_WANT_NO_DELEG;
1169 static enum open_claim_type4
1170 nfs4_map_atomic_open_claim(struct nfs_server *server,
1171 enum open_claim_type4 claim)
1173 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1178 case NFS4_OPEN_CLAIM_FH:
1179 return NFS4_OPEN_CLAIM_NULL;
1180 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1181 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1182 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1183 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1187 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1189 p->o_res.f_attr = &p->f_attr;
1190 p->o_res.f_label = p->f_label;
1191 p->o_res.seqid = p->o_arg.seqid;
1192 p->c_res.seqid = p->c_arg.seqid;
1193 p->o_res.server = p->o_arg.server;
1194 p->o_res.access_request = p->o_arg.access;
1195 nfs_fattr_init(&p->f_attr);
1196 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1199 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1200 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1201 const struct iattr *attrs,
1202 struct nfs4_label *label,
1203 enum open_claim_type4 claim,
1206 struct dentry *parent = dget_parent(dentry);
1207 struct inode *dir = d_inode(parent);
1208 struct nfs_server *server = NFS_SERVER(dir);
1209 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1210 struct nfs4_opendata *p;
1212 p = kzalloc(sizeof(*p), gfp_mask);
1216 p->f_label = nfs4_label_alloc(server, gfp_mask);
1217 if (IS_ERR(p->f_label))
1220 p->a_label = nfs4_label_alloc(server, gfp_mask);
1221 if (IS_ERR(p->a_label))
1224 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1225 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1226 if (IS_ERR(p->o_arg.seqid))
1227 goto err_free_label;
1228 nfs_sb_active(dentry->d_sb);
1229 p->dentry = dget(dentry);
1232 atomic_inc(&sp->so_count);
1233 p->o_arg.open_flags = flags;
1234 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1235 p->o_arg.umask = current_umask();
1236 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1237 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1239 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1240 * will return permission denied for all bits until close */
1241 if (!(flags & O_EXCL)) {
1242 /* ask server to check for all possible rights as results
1244 switch (p->o_arg.claim) {
1247 case NFS4_OPEN_CLAIM_NULL:
1248 case NFS4_OPEN_CLAIM_FH:
1249 p->o_arg.access = NFS4_ACCESS_READ |
1250 NFS4_ACCESS_MODIFY |
1251 NFS4_ACCESS_EXTEND |
1252 NFS4_ACCESS_EXECUTE;
1255 p->o_arg.clientid = server->nfs_client->cl_clientid;
1256 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1257 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1258 p->o_arg.name = &dentry->d_name;
1259 p->o_arg.server = server;
1260 p->o_arg.bitmask = nfs4_bitmask(server, label);
1261 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1262 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1263 switch (p->o_arg.claim) {
1264 case NFS4_OPEN_CLAIM_NULL:
1265 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1266 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1267 p->o_arg.fh = NFS_FH(dir);
1269 case NFS4_OPEN_CLAIM_PREVIOUS:
1270 case NFS4_OPEN_CLAIM_FH:
1271 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1272 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1273 p->o_arg.fh = NFS_FH(d_inode(dentry));
1275 if (attrs != NULL && attrs->ia_valid != 0) {
1278 p->o_arg.u.attrs = &p->attrs;
1279 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1282 verf[1] = current->pid;
1283 memcpy(p->o_arg.u.verifier.data, verf,
1284 sizeof(p->o_arg.u.verifier.data));
1286 p->c_arg.fh = &p->o_res.fh;
1287 p->c_arg.stateid = &p->o_res.stateid;
1288 p->c_arg.seqid = p->o_arg.seqid;
1289 nfs4_init_opendata_res(p);
1290 kref_init(&p->kref);
1294 nfs4_label_free(p->a_label);
1296 nfs4_label_free(p->f_label);
1304 static void nfs4_opendata_free(struct kref *kref)
1306 struct nfs4_opendata *p = container_of(kref,
1307 struct nfs4_opendata, kref);
1308 struct super_block *sb = p->dentry->d_sb;
1310 nfs_free_seqid(p->o_arg.seqid);
1311 nfs4_sequence_free_slot(&p->o_res.seq_res);
1312 if (p->state != NULL)
1313 nfs4_put_open_state(p->state);
1314 nfs4_put_state_owner(p->owner);
1316 nfs4_label_free(p->a_label);
1317 nfs4_label_free(p->f_label);
1321 nfs_sb_deactive(sb);
1322 nfs_fattr_free_names(&p->f_attr);
1323 kfree(p->f_attr.mdsthreshold);
1327 static void nfs4_opendata_put(struct nfs4_opendata *p)
1330 kref_put(&p->kref, nfs4_opendata_free);
1333 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1337 ret = rpc_wait_for_completion_task(task);
1341 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1344 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1345 case FMODE_READ|FMODE_WRITE:
1346 return state->n_rdwr != 0;
1348 return state->n_wronly != 0;
1350 return state->n_rdonly != 0;
1356 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1360 if (open_mode & (O_EXCL|O_TRUNC))
1362 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1364 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1365 && state->n_rdonly != 0;
1368 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1369 && state->n_wronly != 0;
1371 case FMODE_READ|FMODE_WRITE:
1372 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1373 && state->n_rdwr != 0;
1379 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1380 enum open_claim_type4 claim)
1382 if (delegation == NULL)
1384 if ((delegation->type & fmode) != fmode)
1386 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1389 case NFS4_OPEN_CLAIM_NULL:
1390 case NFS4_OPEN_CLAIM_FH:
1392 case NFS4_OPEN_CLAIM_PREVIOUS:
1393 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1398 nfs_mark_delegation_referenced(delegation);
1402 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1411 case FMODE_READ|FMODE_WRITE:
1414 nfs4_state_set_mode_locked(state, state->state | fmode);
1417 #ifdef CONFIG_NFS_V4_1
1418 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1420 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1422 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1424 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1428 #endif /* CONFIG_NFS_V4_1 */
1430 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1432 struct nfs_client *clp = state->owner->so_server->nfs_client;
1433 bool need_recover = false;
1435 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1436 need_recover = true;
1437 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1438 need_recover = true;
1439 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1440 need_recover = true;
1442 nfs4_state_mark_reclaim_nograce(clp, state);
1445 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1446 const nfs4_stateid *stateid, nfs4_stateid *freeme)
1448 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1450 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1451 nfs4_stateid_copy(freeme, &state->open_stateid);
1452 nfs_test_and_clear_all_open_stateid(state);
1455 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1460 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1462 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1464 if (state->n_wronly)
1465 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1466 if (state->n_rdonly)
1467 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1469 set_bit(NFS_O_RDWR_STATE, &state->flags);
1470 set_bit(NFS_OPEN_STATE, &state->flags);
1473 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1474 nfs4_stateid *stateid, fmode_t fmode)
1476 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1477 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1479 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1482 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1485 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1486 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1487 clear_bit(NFS_OPEN_STATE, &state->flags);
1489 if (stateid == NULL)
1491 /* Handle OPEN+OPEN_DOWNGRADE races */
1492 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1493 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1494 nfs_resync_open_stateid_locked(state);
1497 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1498 nfs4_stateid_copy(&state->stateid, stateid);
1499 nfs4_stateid_copy(&state->open_stateid, stateid);
1502 static void nfs_clear_open_stateid(struct nfs4_state *state,
1503 nfs4_stateid *arg_stateid,
1504 nfs4_stateid *stateid, fmode_t fmode)
1506 write_seqlock(&state->seqlock);
1507 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1508 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1509 nfs_clear_open_stateid_locked(state, stateid, fmode);
1510 write_sequnlock(&state->seqlock);
1511 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1512 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1515 static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1516 const nfs4_stateid *stateid, fmode_t fmode,
1517 nfs4_stateid *freeme)
1521 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1524 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1526 case FMODE_READ|FMODE_WRITE:
1527 set_bit(NFS_O_RDWR_STATE, &state->flags);
1529 if (!nfs_need_update_open_stateid(state, stateid, freeme))
1531 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1532 nfs4_stateid_copy(&state->stateid, stateid);
1533 nfs4_stateid_copy(&state->open_stateid, stateid);
1536 static void __update_open_stateid(struct nfs4_state *state,
1537 const nfs4_stateid *open_stateid,
1538 const nfs4_stateid *deleg_stateid,
1540 nfs4_stateid *freeme)
1543 * Protect the call to nfs4_state_set_mode_locked and
1544 * serialise the stateid update
1546 spin_lock(&state->owner->so_lock);
1547 write_seqlock(&state->seqlock);
1548 if (deleg_stateid != NULL) {
1549 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1550 set_bit(NFS_DELEGATED_STATE, &state->flags);
1552 if (open_stateid != NULL)
1553 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
1554 write_sequnlock(&state->seqlock);
1555 update_open_stateflags(state, fmode);
1556 spin_unlock(&state->owner->so_lock);
1559 static int update_open_stateid(struct nfs4_state *state,
1560 const nfs4_stateid *open_stateid,
1561 const nfs4_stateid *delegation,
1564 struct nfs_server *server = NFS_SERVER(state->inode);
1565 struct nfs_client *clp = server->nfs_client;
1566 struct nfs_inode *nfsi = NFS_I(state->inode);
1567 struct nfs_delegation *deleg_cur;
1568 nfs4_stateid freeme = { };
1571 fmode &= (FMODE_READ|FMODE_WRITE);
1574 deleg_cur = rcu_dereference(nfsi->delegation);
1575 if (deleg_cur == NULL)
1578 spin_lock(&deleg_cur->lock);
1579 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1580 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1581 (deleg_cur->type & fmode) != fmode)
1582 goto no_delegation_unlock;
1584 if (delegation == NULL)
1585 delegation = &deleg_cur->stateid;
1586 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1587 goto no_delegation_unlock;
1589 nfs_mark_delegation_referenced(deleg_cur);
1590 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1593 no_delegation_unlock:
1594 spin_unlock(&deleg_cur->lock);
1598 if (!ret && open_stateid != NULL) {
1599 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
1602 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1603 nfs4_schedule_state_manager(clp);
1604 if (freeme.type != 0)
1605 nfs4_test_and_free_stateid(server, &freeme,
1606 state->owner->so_cred);
1611 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1612 const nfs4_stateid *stateid)
1614 struct nfs4_state *state = lsp->ls_state;
1617 spin_lock(&state->state_lock);
1618 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1620 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1622 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1625 spin_unlock(&state->state_lock);
1629 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1631 struct nfs_delegation *delegation;
1634 delegation = rcu_dereference(NFS_I(inode)->delegation);
1635 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1640 nfs4_inode_return_delegation(inode);
1643 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1645 struct nfs4_state *state = opendata->state;
1646 struct nfs_inode *nfsi = NFS_I(state->inode);
1647 struct nfs_delegation *delegation;
1648 int open_mode = opendata->o_arg.open_flags;
1649 fmode_t fmode = opendata->o_arg.fmode;
1650 enum open_claim_type4 claim = opendata->o_arg.claim;
1651 nfs4_stateid stateid;
1655 spin_lock(&state->owner->so_lock);
1656 if (can_open_cached(state, fmode, open_mode)) {
1657 update_open_stateflags(state, fmode);
1658 spin_unlock(&state->owner->so_lock);
1659 goto out_return_state;
1661 spin_unlock(&state->owner->so_lock);
1663 delegation = rcu_dereference(nfsi->delegation);
1664 if (!can_open_delegated(delegation, fmode, claim)) {
1668 /* Save the delegation */
1669 nfs4_stateid_copy(&stateid, &delegation->stateid);
1671 nfs_release_seqid(opendata->o_arg.seqid);
1672 if (!opendata->is_recover) {
1673 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1679 /* Try to update the stateid using the delegation */
1680 if (update_open_stateid(state, NULL, &stateid, fmode))
1681 goto out_return_state;
1684 return ERR_PTR(ret);
1686 atomic_inc(&state->count);
1691 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1693 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1694 struct nfs_delegation *delegation;
1695 int delegation_flags = 0;
1698 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1700 delegation_flags = delegation->flags;
1702 switch (data->o_arg.claim) {
1705 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1706 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1707 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1708 "returning a delegation for "
1709 "OPEN(CLAIM_DELEGATE_CUR)\n",
1713 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1714 nfs_inode_set_delegation(state->inode,
1715 data->owner->so_cred,
1718 nfs_inode_reclaim_delegation(state->inode,
1719 data->owner->so_cred,
1724 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1725 * and update the nfs4_state.
1727 static struct nfs4_state *
1728 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1730 struct inode *inode = data->state->inode;
1731 struct nfs4_state *state = data->state;
1734 if (!data->rpc_done) {
1735 if (data->rpc_status) {
1736 ret = data->rpc_status;
1739 /* cached opens have already been processed */
1743 ret = nfs_refresh_inode(inode, &data->f_attr);
1747 if (data->o_res.delegation_type != 0)
1748 nfs4_opendata_check_deleg(data, state);
1750 update_open_stateid(state, &data->o_res.stateid, NULL,
1752 atomic_inc(&state->count);
1756 return ERR_PTR(ret);
1760 static struct nfs4_state *
1761 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1763 struct inode *inode;
1764 struct nfs4_state *state = NULL;
1767 if (!data->rpc_done) {
1768 state = nfs4_try_open_cached(data);
1769 trace_nfs4_cached_open(data->state);
1774 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1776 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1777 ret = PTR_ERR(inode);
1781 state = nfs4_get_open_state(inode, data->owner);
1784 if (data->o_res.delegation_type != 0)
1785 nfs4_opendata_check_deleg(data, state);
1786 update_open_stateid(state, &data->o_res.stateid, NULL,
1790 nfs_release_seqid(data->o_arg.seqid);
1795 return ERR_PTR(ret);
1798 static struct nfs4_state *
1799 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1801 struct nfs4_state *ret;
1803 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1804 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1806 ret = _nfs4_opendata_to_nfs4_state(data);
1807 nfs4_sequence_free_slot(&data->o_res.seq_res);
1811 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1813 struct nfs_inode *nfsi = NFS_I(state->inode);
1814 struct nfs_open_context *ctx;
1816 spin_lock(&state->inode->i_lock);
1817 list_for_each_entry(ctx, &nfsi->open_files, list) {
1818 if (ctx->state != state)
1820 get_nfs_open_context(ctx);
1821 spin_unlock(&state->inode->i_lock);
1824 spin_unlock(&state->inode->i_lock);
1825 return ERR_PTR(-ENOENT);
1828 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1829 struct nfs4_state *state, enum open_claim_type4 claim)
1831 struct nfs4_opendata *opendata;
1833 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1834 NULL, NULL, claim, GFP_NOFS);
1835 if (opendata == NULL)
1836 return ERR_PTR(-ENOMEM);
1837 opendata->state = state;
1838 atomic_inc(&state->count);
1842 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1845 struct nfs4_state *newstate;
1848 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
1850 opendata->o_arg.open_flags = 0;
1851 opendata->o_arg.fmode = fmode;
1852 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1853 NFS_SB(opendata->dentry->d_sb),
1855 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1856 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1857 nfs4_init_opendata_res(opendata);
1858 ret = _nfs4_recover_proc_open(opendata);
1861 newstate = nfs4_opendata_to_nfs4_state(opendata);
1862 if (IS_ERR(newstate))
1863 return PTR_ERR(newstate);
1864 if (newstate != opendata->state)
1866 nfs4_close_state(newstate, fmode);
1870 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1874 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1875 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1876 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1877 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1878 /* memory barrier prior to reading state->n_* */
1879 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1880 clear_bit(NFS_OPEN_STATE, &state->flags);
1882 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1885 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1888 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1892 * We may have performed cached opens for all three recoveries.
1893 * Check if we need to update the current stateid.
1895 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1896 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1897 write_seqlock(&state->seqlock);
1898 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1899 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1900 write_sequnlock(&state->seqlock);
1907 * reclaim state on the server after a reboot.
1909 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1911 struct nfs_delegation *delegation;
1912 struct nfs4_opendata *opendata;
1913 fmode_t delegation_type = 0;
1916 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1917 NFS4_OPEN_CLAIM_PREVIOUS);
1918 if (IS_ERR(opendata))
1919 return PTR_ERR(opendata);
1921 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1922 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1923 delegation_type = delegation->type;
1925 opendata->o_arg.u.delegation_type = delegation_type;
1926 status = nfs4_open_recover(opendata, state);
1927 nfs4_opendata_put(opendata);
1931 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1933 struct nfs_server *server = NFS_SERVER(state->inode);
1934 struct nfs4_exception exception = { };
1937 err = _nfs4_do_open_reclaim(ctx, state);
1938 trace_nfs4_open_reclaim(ctx, 0, err);
1939 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1941 if (err != -NFS4ERR_DELAY)
1943 nfs4_handle_exception(server, err, &exception);
1944 } while (exception.retry);
1948 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1950 struct nfs_open_context *ctx;
1953 ctx = nfs4_state_find_open_context(state);
1956 ret = nfs4_do_open_reclaim(ctx, state);
1957 put_nfs_open_context(ctx);
1961 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1965 printk(KERN_ERR "NFS: %s: unhandled error "
1966 "%d.\n", __func__, err);
1972 case -NFS4ERR_BADSESSION:
1973 case -NFS4ERR_BADSLOT:
1974 case -NFS4ERR_BAD_HIGH_SLOT:
1975 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1976 case -NFS4ERR_DEADSESSION:
1977 set_bit(NFS_DELEGATED_STATE, &state->flags);
1978 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1980 case -NFS4ERR_STALE_CLIENTID:
1981 case -NFS4ERR_STALE_STATEID:
1982 set_bit(NFS_DELEGATED_STATE, &state->flags);
1983 /* Don't recall a delegation if it was lost */
1984 nfs4_schedule_lease_recovery(server->nfs_client);
1986 case -NFS4ERR_MOVED:
1987 nfs4_schedule_migration_recovery(server);
1989 case -NFS4ERR_LEASE_MOVED:
1990 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1992 case -NFS4ERR_DELEG_REVOKED:
1993 case -NFS4ERR_ADMIN_REVOKED:
1994 case -NFS4ERR_EXPIRED:
1995 case -NFS4ERR_BAD_STATEID:
1996 case -NFS4ERR_OPENMODE:
1997 nfs_inode_find_state_and_recover(state->inode,
1999 nfs4_schedule_stateid_recovery(server, state);
2001 case -NFS4ERR_DELAY:
2002 case -NFS4ERR_GRACE:
2003 set_bit(NFS_DELEGATED_STATE, &state->flags);
2007 case -NFS4ERR_DENIED:
2008 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
2014 int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
2015 struct nfs4_state *state, const nfs4_stateid *stateid,
2018 struct nfs_server *server = NFS_SERVER(state->inode);
2019 struct nfs4_opendata *opendata;
2022 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2023 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2024 if (IS_ERR(opendata))
2025 return PTR_ERR(opendata);
2026 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
2027 write_seqlock(&state->seqlock);
2028 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2029 write_sequnlock(&state->seqlock);
2030 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2031 switch (type & (FMODE_READ|FMODE_WRITE)) {
2032 case FMODE_READ|FMODE_WRITE:
2034 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2037 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2041 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2043 nfs4_opendata_put(opendata);
2044 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
2047 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2049 struct nfs4_opendata *data = calldata;
2051 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
2052 &data->c_arg.seq_args, &data->c_res.seq_res, task);
2055 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2057 struct nfs4_opendata *data = calldata;
2059 nfs40_sequence_done(task, &data->c_res.seq_res);
2061 data->rpc_status = task->tk_status;
2062 if (data->rpc_status == 0) {
2063 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
2064 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2065 renew_lease(data->o_res.server, data->timestamp);
2070 static void nfs4_open_confirm_release(void *calldata)
2072 struct nfs4_opendata *data = calldata;
2073 struct nfs4_state *state = NULL;
2075 /* If this request hasn't been cancelled, do nothing */
2076 if (data->cancelled == 0)
2078 /* In case of error, no cleanup! */
2079 if (!data->rpc_done)
2081 state = nfs4_opendata_to_nfs4_state(data);
2083 nfs4_close_state(state, data->o_arg.fmode);
2085 nfs4_opendata_put(data);
2088 static const struct rpc_call_ops nfs4_open_confirm_ops = {
2089 .rpc_call_prepare = nfs4_open_confirm_prepare,
2090 .rpc_call_done = nfs4_open_confirm_done,
2091 .rpc_release = nfs4_open_confirm_release,
2095 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2097 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2099 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
2100 struct rpc_task *task;
2101 struct rpc_message msg = {
2102 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2103 .rpc_argp = &data->c_arg,
2104 .rpc_resp = &data->c_res,
2105 .rpc_cred = data->owner->so_cred,
2107 struct rpc_task_setup task_setup_data = {
2108 .rpc_client = server->client,
2109 .rpc_message = &msg,
2110 .callback_ops = &nfs4_open_confirm_ops,
2111 .callback_data = data,
2112 .workqueue = nfsiod_workqueue,
2113 .flags = RPC_TASK_ASYNC,
2117 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
2118 kref_get(&data->kref);
2120 data->rpc_status = 0;
2121 data->timestamp = jiffies;
2122 if (data->is_recover)
2123 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
2124 task = rpc_run_task(&task_setup_data);
2126 return PTR_ERR(task);
2127 status = nfs4_wait_for_completion_rpc_task(task);
2129 data->cancelled = 1;
2132 status = data->rpc_status;
2137 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
2139 struct nfs4_opendata *data = calldata;
2140 struct nfs4_state_owner *sp = data->owner;
2141 struct nfs_client *clp = sp->so_server->nfs_client;
2142 enum open_claim_type4 claim = data->o_arg.claim;
2144 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
2147 * Check if we still need to send an OPEN call, or if we can use
2148 * a delegation instead.
2150 if (data->state != NULL) {
2151 struct nfs_delegation *delegation;
2153 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
2156 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2157 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
2158 goto unlock_no_action;
2161 /* Update client id. */
2162 data->o_arg.clientid = clp->cl_clientid;
2166 case NFS4_OPEN_CLAIM_PREVIOUS:
2167 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2168 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2169 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2170 case NFS4_OPEN_CLAIM_FH:
2171 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2172 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2174 data->timestamp = jiffies;
2175 if (nfs4_setup_sequence(data->o_arg.server,
2176 &data->o_arg.seq_args,
2177 &data->o_res.seq_res,
2179 nfs_release_seqid(data->o_arg.seqid);
2181 /* Set the create mode (note dependency on the session type) */
2182 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2183 if (data->o_arg.open_flags & O_EXCL) {
2184 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2185 if (nfs4_has_persistent_session(clp))
2186 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2187 else if (clp->cl_mvops->minor_version > 0)
2188 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2192 trace_nfs4_cached_open(data->state);
2195 task->tk_action = NULL;
2197 nfs4_sequence_done(task, &data->o_res.seq_res);
2200 static void nfs4_open_done(struct rpc_task *task, void *calldata)
2202 struct nfs4_opendata *data = calldata;
2204 data->rpc_status = task->tk_status;
2206 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
2209 if (task->tk_status == 0) {
2210 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2211 switch (data->o_res.f_attr->mode & S_IFMT) {
2215 data->rpc_status = -ELOOP;
2218 data->rpc_status = -EISDIR;
2221 data->rpc_status = -ENOTDIR;
2224 renew_lease(data->o_res.server, data->timestamp);
2225 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2226 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2231 static void nfs4_open_release(void *calldata)
2233 struct nfs4_opendata *data = calldata;
2234 struct nfs4_state *state = NULL;
2236 /* If this request hasn't been cancelled, do nothing */
2237 if (data->cancelled == 0)
2239 /* In case of error, no cleanup! */
2240 if (data->rpc_status != 0 || !data->rpc_done)
2242 /* In case we need an open_confirm, no cleanup! */
2243 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2245 state = nfs4_opendata_to_nfs4_state(data);
2247 nfs4_close_state(state, data->o_arg.fmode);
2249 nfs4_opendata_put(data);
2252 static const struct rpc_call_ops nfs4_open_ops = {
2253 .rpc_call_prepare = nfs4_open_prepare,
2254 .rpc_call_done = nfs4_open_done,
2255 .rpc_release = nfs4_open_release,
2258 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
2260 struct inode *dir = d_inode(data->dir);
2261 struct nfs_server *server = NFS_SERVER(dir);
2262 struct nfs_openargs *o_arg = &data->o_arg;
2263 struct nfs_openres *o_res = &data->o_res;
2264 struct rpc_task *task;
2265 struct rpc_message msg = {
2266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2269 .rpc_cred = data->owner->so_cred,
2271 struct rpc_task_setup task_setup_data = {
2272 .rpc_client = server->client,
2273 .rpc_message = &msg,
2274 .callback_ops = &nfs4_open_ops,
2275 .callback_data = data,
2276 .workqueue = nfsiod_workqueue,
2277 .flags = RPC_TASK_ASYNC,
2281 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
2282 kref_get(&data->kref);
2284 data->rpc_status = 0;
2285 data->cancelled = 0;
2286 data->is_recover = 0;
2288 nfs4_set_sequence_privileged(&o_arg->seq_args);
2289 data->is_recover = 1;
2291 task = rpc_run_task(&task_setup_data);
2293 return PTR_ERR(task);
2294 status = nfs4_wait_for_completion_rpc_task(task);
2296 data->cancelled = 1;
2299 status = data->rpc_status;
2305 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2307 struct inode *dir = d_inode(data->dir);
2308 struct nfs_openres *o_res = &data->o_res;
2311 status = nfs4_run_open_task(data, 1);
2312 if (status != 0 || !data->rpc_done)
2315 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2317 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2318 status = _nfs4_proc_open_confirm(data);
2327 * Additional permission checks in order to distinguish between an
2328 * open for read, and an open for execute. This works around the
2329 * fact that NFSv4 OPEN treats read and execute permissions as being
2331 * Note that in the non-execute case, we want to turn off permission
2332 * checking if we just created a new file (POSIX open() semantics).
2334 static int nfs4_opendata_access(struct rpc_cred *cred,
2335 struct nfs4_opendata *opendata,
2336 struct nfs4_state *state, fmode_t fmode,
2339 struct nfs_access_entry cache;
2342 /* access call failed or for some reason the server doesn't
2343 * support any access modes -- defer access call until later */
2344 if (opendata->o_res.access_supported == 0)
2349 * Use openflags to check for exec, because fmode won't
2350 * always have FMODE_EXEC set when file open for exec.
2352 if (openflags & __FMODE_EXEC) {
2353 /* ONLY check for exec rights */
2355 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2359 cache.jiffies = jiffies;
2360 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2361 nfs_access_add_cache(state->inode, &cache);
2363 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2366 /* even though OPEN succeeded, access is denied. Close the file */
2367 nfs4_close_state(state, fmode);
2372 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2374 static int _nfs4_proc_open(struct nfs4_opendata *data)
2376 struct inode *dir = d_inode(data->dir);
2377 struct nfs_server *server = NFS_SERVER(dir);
2378 struct nfs_openargs *o_arg = &data->o_arg;
2379 struct nfs_openres *o_res = &data->o_res;
2382 status = nfs4_run_open_task(data, 0);
2383 if (!data->rpc_done)
2386 if (status == -NFS4ERR_BADNAME &&
2387 !(o_arg->open_flags & O_CREAT))
2392 nfs_fattr_map_and_free_names(server, &data->f_attr);
2394 if (o_arg->open_flags & O_CREAT) {
2395 if (o_arg->open_flags & O_EXCL)
2396 data->file_created = 1;
2397 else if (o_res->cinfo.before != o_res->cinfo.after)
2398 data->file_created = 1;
2399 if (data->file_created || dir->i_version != o_res->cinfo.after)
2400 update_changeattr(dir, &o_res->cinfo,
2401 o_res->f_attr->time_start);
2403 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2404 server->caps &= ~NFS_CAP_POSIX_LOCK;
2405 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2406 status = _nfs4_proc_open_confirm(data);
2410 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2411 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2415 static int nfs4_recover_expired_lease(struct nfs_server *server)
2417 return nfs4_client_recover_expired_lease(server->nfs_client);
2422 * reclaim state on the server after a network partition.
2423 * Assumes caller holds the appropriate lock
2425 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2427 struct nfs4_opendata *opendata;
2430 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2431 NFS4_OPEN_CLAIM_FH);
2432 if (IS_ERR(opendata))
2433 return PTR_ERR(opendata);
2434 ret = nfs4_open_recover(opendata, state);
2436 d_drop(ctx->dentry);
2437 nfs4_opendata_put(opendata);
2441 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2443 struct nfs_server *server = NFS_SERVER(state->inode);
2444 struct nfs4_exception exception = { };
2448 err = _nfs4_open_expired(ctx, state);
2449 trace_nfs4_open_expired(ctx, 0, err);
2450 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2455 case -NFS4ERR_GRACE:
2456 case -NFS4ERR_DELAY:
2457 nfs4_handle_exception(server, err, &exception);
2460 } while (exception.retry);
2465 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2467 struct nfs_open_context *ctx;
2470 ctx = nfs4_state_find_open_context(state);
2473 ret = nfs4_do_open_expired(ctx, state);
2474 put_nfs_open_context(ctx);
2478 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2479 const nfs4_stateid *stateid)
2481 nfs_remove_bad_delegation(state->inode, stateid);
2482 write_seqlock(&state->seqlock);
2483 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2484 write_sequnlock(&state->seqlock);
2485 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2488 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2490 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2491 nfs_finish_clear_delegation_stateid(state, NULL);
2494 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2496 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2497 nfs40_clear_delegation_stateid(state);
2498 return nfs4_open_expired(sp, state);
2501 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2502 nfs4_stateid *stateid,
2503 struct rpc_cred *cred)
2505 return -NFS4ERR_BAD_STATEID;
2508 #if defined(CONFIG_NFS_V4_1)
2509 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2510 nfs4_stateid *stateid,
2511 struct rpc_cred *cred)
2515 switch (stateid->type) {
2518 case NFS4_INVALID_STATEID_TYPE:
2519 case NFS4_SPECIAL_STATEID_TYPE:
2520 return -NFS4ERR_BAD_STATEID;
2521 case NFS4_REVOKED_STATEID_TYPE:
2525 status = nfs41_test_stateid(server, stateid, cred);
2527 case -NFS4ERR_EXPIRED:
2528 case -NFS4ERR_ADMIN_REVOKED:
2529 case -NFS4ERR_DELEG_REVOKED:
2535 /* Ack the revoked state to the server */
2536 nfs41_free_stateid(server, stateid, cred, true);
2537 return -NFS4ERR_EXPIRED;
2540 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2542 struct nfs_server *server = NFS_SERVER(state->inode);
2543 nfs4_stateid stateid;
2544 struct nfs_delegation *delegation;
2545 struct rpc_cred *cred;
2548 /* Get the delegation credential for use by test/free_stateid */
2550 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2551 if (delegation == NULL) {
2556 nfs4_stateid_copy(&stateid, &delegation->stateid);
2557 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
2559 nfs_finish_clear_delegation_stateid(state, &stateid);
2563 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags)) {
2568 cred = get_rpccred(delegation->cred);
2570 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
2571 trace_nfs4_test_delegation_stateid(state, NULL, status);
2572 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
2573 nfs_finish_clear_delegation_stateid(state, &stateid);
2579 * nfs41_check_expired_locks - possibly free a lock stateid
2581 * @state: NFSv4 state for an inode
2583 * Returns NFS_OK if recovery for this stateid is now finished.
2584 * Otherwise a negative NFS4ERR value is returned.
2586 static int nfs41_check_expired_locks(struct nfs4_state *state)
2588 int status, ret = NFS_OK;
2589 struct nfs4_lock_state *lsp, *prev = NULL;
2590 struct nfs_server *server = NFS_SERVER(state->inode);
2592 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2595 spin_lock(&state->state_lock);
2596 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2597 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2598 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2600 atomic_inc(&lsp->ls_count);
2601 spin_unlock(&state->state_lock);
2603 nfs4_put_lock_state(prev);
2606 status = nfs41_test_and_free_expired_stateid(server,
2609 trace_nfs4_test_lock_stateid(state, lsp, status);
2610 if (status == -NFS4ERR_EXPIRED ||
2611 status == -NFS4ERR_BAD_STATEID) {
2612 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
2613 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
2614 if (!recover_lost_locks)
2615 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2616 } else if (status != NFS_OK) {
2618 nfs4_put_lock_state(prev);
2621 spin_lock(&state->state_lock);
2624 spin_unlock(&state->state_lock);
2625 nfs4_put_lock_state(prev);
2631 * nfs41_check_open_stateid - possibly free an open stateid
2633 * @state: NFSv4 state for an inode
2635 * Returns NFS_OK if recovery for this stateid is now finished.
2636 * Otherwise a negative NFS4ERR value is returned.
2638 static int nfs41_check_open_stateid(struct nfs4_state *state)
2640 struct nfs_server *server = NFS_SERVER(state->inode);
2641 nfs4_stateid *stateid = &state->open_stateid;
2642 struct rpc_cred *cred = state->owner->so_cred;
2645 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
2646 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2647 if (nfs4_have_delegation(state->inode, state->state))
2649 return -NFS4ERR_OPENMODE;
2651 return -NFS4ERR_BAD_STATEID;
2653 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
2654 trace_nfs4_test_open_stateid(state, NULL, status);
2655 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
2656 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2657 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2658 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2659 clear_bit(NFS_OPEN_STATE, &state->flags);
2660 stateid->type = NFS4_INVALID_STATEID_TYPE;
2662 if (status != NFS_OK)
2664 if (nfs_open_stateid_recover_openmode(state))
2665 return -NFS4ERR_OPENMODE;
2669 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2673 nfs41_check_delegation_stateid(state);
2674 status = nfs41_check_expired_locks(state);
2675 if (status != NFS_OK)
2677 status = nfs41_check_open_stateid(state);
2678 if (status != NFS_OK)
2679 status = nfs4_open_expired(sp, state);
2685 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2686 * fields corresponding to attributes that were used to store the verifier.
2687 * Make sure we clobber those fields in the later setattr call
2689 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2690 struct iattr *sattr, struct nfs4_label **label)
2692 const u32 *attrset = opendata->o_res.attrset;
2694 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2695 !(sattr->ia_valid & ATTR_ATIME_SET))
2696 sattr->ia_valid |= ATTR_ATIME;
2698 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2699 !(sattr->ia_valid & ATTR_MTIME_SET))
2700 sattr->ia_valid |= ATTR_MTIME;
2702 /* Except MODE, it seems harmless of setting twice. */
2703 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
2704 attrset[1] & FATTR4_WORD1_MODE)
2705 sattr->ia_valid &= ~ATTR_MODE;
2707 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2711 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2714 struct nfs_open_context *ctx)
2716 struct nfs4_state_owner *sp = opendata->owner;
2717 struct nfs_server *server = sp->so_server;
2718 struct dentry *dentry;
2719 struct nfs4_state *state;
2723 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2725 ret = _nfs4_proc_open(opendata);
2729 state = nfs4_opendata_to_nfs4_state(opendata);
2730 ret = PTR_ERR(state);
2733 if (server->caps & NFS_CAP_POSIX_LOCK)
2734 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2735 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2736 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
2738 dentry = opendata->dentry;
2739 if (d_really_is_negative(dentry)) {
2740 struct dentry *alias;
2742 alias = d_exact_alias(dentry, state->inode);
2744 alias = d_splice_alias(igrab(state->inode), dentry);
2745 /* d_splice_alias() can't fail here - it's a non-directory */
2748 ctx->dentry = dentry = alias;
2750 nfs_set_verifier(dentry,
2751 nfs_save_change_attribute(d_inode(opendata->dir)));
2754 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2759 if (d_inode(dentry) == state->inode) {
2760 nfs_inode_attach_open_context(ctx);
2761 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2762 nfs4_schedule_stateid_recovery(server, state);
2769 * Returns a referenced nfs4_state
2771 static int _nfs4_do_open(struct inode *dir,
2772 struct nfs_open_context *ctx,
2774 struct iattr *sattr,
2775 struct nfs4_label *label,
2778 struct nfs4_state_owner *sp;
2779 struct nfs4_state *state = NULL;
2780 struct nfs_server *server = NFS_SERVER(dir);
2781 struct nfs4_opendata *opendata;
2782 struct dentry *dentry = ctx->dentry;
2783 struct rpc_cred *cred = ctx->cred;
2784 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2785 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2786 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2787 struct nfs4_label *olabel = NULL;
2790 /* Protect against reboot recovery conflicts */
2792 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2794 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2797 status = nfs4_recover_expired_lease(server);
2799 goto err_put_state_owner;
2800 if (d_really_is_positive(dentry))
2801 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2803 if (d_really_is_positive(dentry))
2804 claim = NFS4_OPEN_CLAIM_FH;
2805 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2806 label, claim, GFP_KERNEL);
2807 if (opendata == NULL)
2808 goto err_put_state_owner;
2811 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2812 if (IS_ERR(olabel)) {
2813 status = PTR_ERR(olabel);
2814 goto err_opendata_put;
2818 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2819 if (!opendata->f_attr.mdsthreshold) {
2820 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2821 if (!opendata->f_attr.mdsthreshold)
2822 goto err_free_label;
2824 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2826 if (d_really_is_positive(dentry))
2827 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2829 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2831 goto err_free_label;
2834 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
2835 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2836 nfs4_exclusive_attrset(opendata, sattr, &label);
2838 * send create attributes which was not set by open
2839 * with an extra setattr.
2841 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2842 nfs_fattr_init(opendata->o_res.f_attr);
2843 status = nfs4_do_setattr(state->inode, cred,
2844 opendata->o_res.f_attr, sattr,
2845 ctx, label, olabel);
2847 nfs_setattr_update_inode(state->inode, sattr,
2848 opendata->o_res.f_attr);
2849 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2853 if (opened && opendata->file_created)
2854 *opened |= FILE_CREATED;
2856 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2857 *ctx_th = opendata->f_attr.mdsthreshold;
2858 opendata->f_attr.mdsthreshold = NULL;
2861 nfs4_label_free(olabel);
2863 nfs4_opendata_put(opendata);
2864 nfs4_put_state_owner(sp);
2867 nfs4_label_free(olabel);
2869 nfs4_opendata_put(opendata);
2870 err_put_state_owner:
2871 nfs4_put_state_owner(sp);
2877 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2878 struct nfs_open_context *ctx,
2880 struct iattr *sattr,
2881 struct nfs4_label *label,
2884 struct nfs_server *server = NFS_SERVER(dir);
2885 struct nfs4_exception exception = { };
2886 struct nfs4_state *res;
2890 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2892 trace_nfs4_open_file(ctx, flags, status);
2895 /* NOTE: BAD_SEQID means the server and client disagree about the
2896 * book-keeping w.r.t. state-changing operations
2897 * (OPEN/CLOSE/LOCK/LOCKU...)
2898 * It is actually a sign of a bug on the client or on the server.
2900 * If we receive a BAD_SEQID error in the particular case of
2901 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2902 * have unhashed the old state_owner for us, and that we can
2903 * therefore safely retry using a new one. We should still warn
2904 * the user though...
2906 if (status == -NFS4ERR_BAD_SEQID) {
2907 pr_warn_ratelimited("NFS: v4 server %s "
2908 " returned a bad sequence-id error!\n",
2909 NFS_SERVER(dir)->nfs_client->cl_hostname);
2910 exception.retry = 1;
2914 * BAD_STATEID on OPEN means that the server cancelled our
2915 * state before it received the OPEN_CONFIRM.
2916 * Recover by retrying the request as per the discussion
2917 * on Page 181 of RFC3530.
2919 if (status == -NFS4ERR_BAD_STATEID) {
2920 exception.retry = 1;
2923 if (status == -EAGAIN) {
2924 /* We must have found a delegation */
2925 exception.retry = 1;
2928 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2930 res = ERR_PTR(nfs4_handle_exception(server,
2931 status, &exception));
2932 } while (exception.retry);
2936 static int _nfs4_do_setattr(struct inode *inode,
2937 struct nfs_setattrargs *arg,
2938 struct nfs_setattrres *res,
2939 struct rpc_cred *cred,
2940 struct nfs_open_context *ctx)
2942 struct nfs_server *server = NFS_SERVER(inode);
2943 struct rpc_message msg = {
2944 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2949 struct rpc_cred *delegation_cred = NULL;
2950 unsigned long timestamp = jiffies;
2955 nfs_fattr_init(res->fattr);
2957 /* Servers should only apply open mode checks for file size changes */
2958 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
2959 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2961 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
2962 /* Use that stateid */
2963 } else if (truncate && ctx != NULL) {
2964 struct nfs_lock_context *l_ctx;
2965 if (!nfs4_valid_open_stateid(ctx->state))
2967 l_ctx = nfs_get_lock_context(ctx);
2969 return PTR_ERR(l_ctx);
2970 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2971 &arg->stateid, &delegation_cred);
2972 nfs_put_lock_context(l_ctx);
2976 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
2977 if (delegation_cred)
2978 msg.rpc_cred = delegation_cred;
2980 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
2982 put_rpccred(delegation_cred);
2983 if (status == 0 && ctx != NULL)
2984 renew_lease(server, timestamp);
2985 trace_nfs4_setattr(inode, &arg->stateid, status);
2989 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2990 struct nfs_fattr *fattr, struct iattr *sattr,
2991 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
2992 struct nfs4_label *olabel)
2994 struct nfs_server *server = NFS_SERVER(inode);
2995 struct nfs4_state *state = ctx ? ctx->state : NULL;
2996 struct nfs_setattrargs arg = {
2997 .fh = NFS_FH(inode),
3000 .bitmask = server->attr_bitmask,
3003 struct nfs_setattrres res = {
3008 struct nfs4_exception exception = {
3011 .stateid = &arg.stateid,
3015 arg.bitmask = nfs4_bitmask(server, ilabel);
3017 arg.bitmask = nfs4_bitmask(server, olabel);
3020 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
3022 case -NFS4ERR_OPENMODE:
3023 if (!(sattr->ia_valid & ATTR_SIZE)) {
3024 pr_warn_once("NFSv4: server %s is incorrectly "
3025 "applying open mode checks to "
3026 "a SETATTR that is not "
3027 "changing file size.\n",
3028 server->nfs_client->cl_hostname);
3030 if (state && !(state->state & FMODE_WRITE)) {
3032 if (sattr->ia_valid & ATTR_OPEN)
3037 err = nfs4_handle_exception(server, err, &exception);
3038 } while (exception.retry);
3044 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3046 if (inode == NULL || !nfs_have_layout(inode))
3049 return pnfs_wait_on_layoutreturn(inode, task);
3052 struct nfs4_closedata {
3053 struct inode *inode;
3054 struct nfs4_state *state;
3055 struct nfs_closeargs arg;
3056 struct nfs_closeres res;
3058 struct nfs4_layoutreturn_args arg;
3059 struct nfs4_layoutreturn_res res;
3060 struct nfs4_xdr_opaque_data ld_private;
3064 struct nfs_fattr fattr;
3065 unsigned long timestamp;
3068 static void nfs4_free_closedata(void *data)
3070 struct nfs4_closedata *calldata = data;
3071 struct nfs4_state_owner *sp = calldata->state->owner;
3072 struct super_block *sb = calldata->state->inode->i_sb;
3074 if (calldata->lr.roc)
3075 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3076 calldata->res.lr_ret);
3077 nfs4_put_open_state(calldata->state);
3078 nfs_free_seqid(calldata->arg.seqid);
3079 nfs4_put_state_owner(sp);
3080 nfs_sb_deactive(sb);
3084 static void nfs4_close_done(struct rpc_task *task, void *data)
3086 struct nfs4_closedata *calldata = data;
3087 struct nfs4_state *state = calldata->state;
3088 struct nfs_server *server = NFS_SERVER(calldata->inode);
3089 nfs4_stateid *res_stateid = NULL;
3091 dprintk("%s: begin!\n", __func__);
3092 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3094 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
3096 /* Handle Layoutreturn errors */
3097 if (calldata->arg.lr_args && task->tk_status != 0) {
3098 switch (calldata->res.lr_ret) {
3100 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3103 calldata->arg.lr_args = NULL;
3104 calldata->res.lr_res = NULL;
3106 case -NFS4ERR_ADMIN_REVOKED:
3107 case -NFS4ERR_DELEG_REVOKED:
3108 case -NFS4ERR_EXPIRED:
3109 case -NFS4ERR_BAD_STATEID:
3110 case -NFS4ERR_OLD_STATEID:
3111 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3112 case -NFS4ERR_WRONG_CRED:
3113 calldata->arg.lr_args = NULL;
3114 calldata->res.lr_res = NULL;
3115 calldata->res.lr_ret = 0;
3116 rpc_restart_call_prepare(task);
3121 /* hmm. we are done with the inode, and in the process of freeing
3122 * the state_owner. we keep this around to process errors
3124 switch (task->tk_status) {
3126 res_stateid = &calldata->res.stateid;
3127 renew_lease(server, calldata->timestamp);
3129 case -NFS4ERR_ACCESS:
3130 if (calldata->arg.bitmask != NULL) {
3131 calldata->arg.bitmask = NULL;
3132 calldata->res.fattr = NULL;
3133 task->tk_status = 0;
3134 rpc_restart_call_prepare(task);
3139 case -NFS4ERR_ADMIN_REVOKED:
3140 case -NFS4ERR_STALE_STATEID:
3141 case -NFS4ERR_EXPIRED:
3142 nfs4_free_revoked_stateid(server,
3143 &calldata->arg.stateid,
3144 task->tk_msg.rpc_cred);
3145 case -NFS4ERR_OLD_STATEID:
3146 case -NFS4ERR_BAD_STATEID:
3147 if (!nfs4_stateid_match(&calldata->arg.stateid,
3148 &state->open_stateid)) {
3149 rpc_restart_call_prepare(task);
3152 if (calldata->arg.fmode == 0)
3155 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
3156 rpc_restart_call_prepare(task);
3160 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3161 res_stateid, calldata->arg.fmode);
3163 nfs_release_seqid(calldata->arg.seqid);
3164 nfs_refresh_inode(calldata->inode, &calldata->fattr);
3165 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
3168 static void nfs4_close_prepare(struct rpc_task *task, void *data)
3170 struct nfs4_closedata *calldata = data;
3171 struct nfs4_state *state = calldata->state;
3172 struct inode *inode = calldata->inode;
3173 bool is_rdonly, is_wronly, is_rdwr;
3176 dprintk("%s: begin!\n", __func__);
3177 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3180 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
3181 spin_lock(&state->owner->so_lock);
3182 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3183 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3184 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
3185 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
3186 /* Calculate the change in open mode */
3187 calldata->arg.fmode = 0;
3188 if (state->n_rdwr == 0) {
3189 if (state->n_rdonly == 0)
3190 call_close |= is_rdonly;
3192 calldata->arg.fmode |= FMODE_READ;
3193 if (state->n_wronly == 0)
3194 call_close |= is_wronly;
3196 calldata->arg.fmode |= FMODE_WRITE;
3197 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3198 call_close |= is_rdwr;
3200 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3202 if (!nfs4_valid_open_stateid(state) ||
3203 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
3205 spin_unlock(&state->owner->so_lock);
3208 /* Note: exit _without_ calling nfs4_close_done */
3212 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
3213 nfs_release_seqid(calldata->arg.seqid);
3217 if (calldata->arg.fmode == 0)
3218 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3220 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3221 /* Close-to-open cache consistency revalidation */
3222 if (!nfs4_have_delegation(inode, FMODE_READ))
3223 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3225 calldata->arg.bitmask = NULL;
3228 calldata->arg.share_access =
3229 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3230 calldata->arg.fmode, 0);
3232 if (calldata->res.fattr == NULL)
3233 calldata->arg.bitmask = NULL;
3234 else if (calldata->arg.bitmask == NULL)
3235 calldata->res.fattr = NULL;
3236 calldata->timestamp = jiffies;
3237 if (nfs4_setup_sequence(NFS_SERVER(inode),
3238 &calldata->arg.seq_args,
3239 &calldata->res.seq_res,
3241 nfs_release_seqid(calldata->arg.seqid);
3242 dprintk("%s: done!\n", __func__);
3245 task->tk_action = NULL;
3247 nfs4_sequence_done(task, &calldata->res.seq_res);
3250 static const struct rpc_call_ops nfs4_close_ops = {
3251 .rpc_call_prepare = nfs4_close_prepare,
3252 .rpc_call_done = nfs4_close_done,
3253 .rpc_release = nfs4_free_closedata,
3257 * It is possible for data to be read/written from a mem-mapped file
3258 * after the sys_close call (which hits the vfs layer as a flush).
3259 * This means that we can't safely call nfsv4 close on a file until
3260 * the inode is cleared. This in turn means that we are not good
3261 * NFSv4 citizens - we do not indicate to the server to update the file's
3262 * share state even when we are done with one of the three share
3263 * stateid's in the inode.
3265 * NOTE: Caller must be holding the sp->so_owner semaphore!
3267 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
3269 struct nfs_server *server = NFS_SERVER(state->inode);
3270 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
3271 struct nfs4_closedata *calldata;
3272 struct nfs4_state_owner *sp = state->owner;
3273 struct rpc_task *task;
3274 struct rpc_message msg = {
3275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3276 .rpc_cred = state->owner->so_cred,
3278 struct rpc_task_setup task_setup_data = {
3279 .rpc_client = server->client,
3280 .rpc_message = &msg,
3281 .callback_ops = &nfs4_close_ops,
3282 .workqueue = nfsiod_workqueue,
3283 .flags = RPC_TASK_ASYNC,
3285 int status = -ENOMEM;
3287 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3288 &task_setup_data.rpc_client, &msg);
3290 calldata = kzalloc(sizeof(*calldata), gfp_mask);
3291 if (calldata == NULL)
3293 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
3294 calldata->inode = state->inode;
3295 calldata->state = state;
3296 calldata->arg.fh = NFS_FH(state->inode);
3297 /* Serialization for the sequence id */
3298 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3299 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
3300 if (IS_ERR(calldata->arg.seqid))
3301 goto out_free_calldata;
3302 nfs_fattr_init(&calldata->fattr);
3303 calldata->arg.fmode = 0;
3304 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
3305 calldata->res.fattr = &calldata->fattr;
3306 calldata->res.seqid = calldata->arg.seqid;
3307 calldata->res.server = server;
3308 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3309 calldata->lr.roc = pnfs_roc(state->inode,
3310 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3311 if (calldata->lr.roc) {
3312 calldata->arg.lr_args = &calldata->lr.arg;
3313 calldata->res.lr_res = &calldata->lr.res;
3315 nfs_sb_active(calldata->inode->i_sb);
3317 msg.rpc_argp = &calldata->arg;
3318 msg.rpc_resp = &calldata->res;
3319 task_setup_data.callback_data = calldata;
3320 task = rpc_run_task(&task_setup_data);
3322 return PTR_ERR(task);
3325 status = rpc_wait_for_completion_task(task);
3331 nfs4_put_open_state(state);
3332 nfs4_put_state_owner(sp);
3336 static struct inode *
3337 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3338 int open_flags, struct iattr *attr, int *opened)
3340 struct nfs4_state *state;
3341 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3343 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3345 /* Protect against concurrent sillydeletes */
3346 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3348 nfs4_label_release_security(label);
3351 return ERR_CAST(state);
3352 return state->inode;
3355 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3357 if (ctx->state == NULL)
3360 nfs4_close_sync(ctx->state, ctx->mode);
3362 nfs4_close_state(ctx->state, ctx->mode);
3365 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3366 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3367 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
3369 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3371 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3372 struct nfs4_server_caps_arg args = {
3376 struct nfs4_server_caps_res res = {};
3377 struct rpc_message msg = {
3378 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3384 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3385 FATTR4_WORD0_FH_EXPIRE_TYPE |
3386 FATTR4_WORD0_LINK_SUPPORT |
3387 FATTR4_WORD0_SYMLINK_SUPPORT |
3388 FATTR4_WORD0_ACLSUPPORT;
3390 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3392 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3394 /* Sanity check the server answers */
3395 switch (minorversion) {
3397 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3398 res.attr_bitmask[2] = 0;
3401 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3404 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3406 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3407 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3408 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3409 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3410 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3411 NFS_CAP_CTIME|NFS_CAP_MTIME|
3412 NFS_CAP_SECURITY_LABEL);
3413 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3414 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3415 server->caps |= NFS_CAP_ACLS;
3416 if (res.has_links != 0)
3417 server->caps |= NFS_CAP_HARDLINKS;
3418 if (res.has_symlinks != 0)
3419 server->caps |= NFS_CAP_SYMLINKS;
3420 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3421 server->caps |= NFS_CAP_FILEID;
3422 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3423 server->caps |= NFS_CAP_MODE;
3424 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3425 server->caps |= NFS_CAP_NLINK;
3426 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3427 server->caps |= NFS_CAP_OWNER;
3428 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3429 server->caps |= NFS_CAP_OWNER_GROUP;
3430 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3431 server->caps |= NFS_CAP_ATIME;
3432 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3433 server->caps |= NFS_CAP_CTIME;
3434 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3435 server->caps |= NFS_CAP_MTIME;
3436 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
3437 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3438 server->caps |= NFS_CAP_SECURITY_LABEL;
3440 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3441 sizeof(server->attr_bitmask));
3442 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3444 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3445 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3446 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3447 server->cache_consistency_bitmask[2] = 0;
3448 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3449 sizeof(server->exclcreat_bitmask));
3450 server->acl_bitmask = res.acl_bitmask;
3451 server->fh_expire_type = res.fh_expire_type;
3457 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3459 struct nfs4_exception exception = { };
3462 err = nfs4_handle_exception(server,
3463 _nfs4_server_capabilities(server, fhandle),
3465 } while (exception.retry);
3469 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3470 struct nfs_fsinfo *info)
3473 struct nfs4_lookup_root_arg args = {
3476 struct nfs4_lookup_res res = {
3478 .fattr = info->fattr,
3481 struct rpc_message msg = {
3482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3487 bitmask[0] = nfs4_fattr_bitmap[0];
3488 bitmask[1] = nfs4_fattr_bitmap[1];
3490 * Process the label in the upcoming getfattr
3492 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3494 nfs_fattr_init(info->fattr);
3495 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3498 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3499 struct nfs_fsinfo *info)
3501 struct nfs4_exception exception = { };
3504 err = _nfs4_lookup_root(server, fhandle, info);
3505 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3508 case -NFS4ERR_WRONGSEC:
3511 err = nfs4_handle_exception(server, err, &exception);
3513 } while (exception.retry);
3518 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3519 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3521 struct rpc_auth_create_args auth_args = {
3522 .pseudoflavor = flavor,
3524 struct rpc_auth *auth;
3527 auth = rpcauth_create(&auth_args, server->client);
3532 ret = nfs4_lookup_root(server, fhandle, info);
3538 * Retry pseudoroot lookup with various security flavors. We do this when:
3540 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3541 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3543 * Returns zero on success, or a negative NFS4ERR value, or a
3544 * negative errno value.
3546 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3547 struct nfs_fsinfo *info)
3549 /* Per 3530bis 15.33.5 */
3550 static const rpc_authflavor_t flav_array[] = {
3554 RPC_AUTH_UNIX, /* courtesy */
3557 int status = -EPERM;
3560 if (server->auth_info.flavor_len > 0) {
3561 /* try each flavor specified by user */
3562 for (i = 0; i < server->auth_info.flavor_len; i++) {
3563 status = nfs4_lookup_root_sec(server, fhandle, info,
3564 server->auth_info.flavors[i]);
3565 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3570 /* no flavors specified by user, try default list */
3571 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3572 status = nfs4_lookup_root_sec(server, fhandle, info,
3574 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3581 * -EACCESS could mean that the user doesn't have correct permissions
3582 * to access the mount. It could also mean that we tried to mount
3583 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3584 * existing mount programs don't handle -EACCES very well so it should
3585 * be mapped to -EPERM instead.
3587 if (status == -EACCES)
3593 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3594 * @server: initialized nfs_server handle
3595 * @fhandle: we fill in the pseudo-fs root file handle
3596 * @info: we fill in an FSINFO struct
3597 * @auth_probe: probe the auth flavours
3599 * Returns zero on success, or a negative errno.
3601 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3602 struct nfs_fsinfo *info,
3608 status = nfs4_lookup_root(server, fhandle, info);
3610 if (auth_probe || status == NFS4ERR_WRONGSEC)
3611 status = server->nfs_client->cl_mvops->find_root_sec(server,
3615 status = nfs4_server_capabilities(server, fhandle);
3617 status = nfs4_do_fsinfo(server, fhandle, info);
3619 return nfs4_map_errors(status);
3622 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3623 struct nfs_fsinfo *info)
3626 struct nfs_fattr *fattr = info->fattr;
3627 struct nfs4_label *label = NULL;
3629 error = nfs4_server_capabilities(server, mntfh);
3631 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3635 label = nfs4_label_alloc(server, GFP_KERNEL);
3637 return PTR_ERR(label);
3639 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3641 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3642 goto err_free_label;
3645 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3646 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3647 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3650 nfs4_label_free(label);
3656 * Get locations and (maybe) other attributes of a referral.
3657 * Note that we'll actually follow the referral later when
3658 * we detect fsid mismatch in inode revalidation
3660 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3661 const struct qstr *name, struct nfs_fattr *fattr,
3662 struct nfs_fh *fhandle)
3664 int status = -ENOMEM;
3665 struct page *page = NULL;
3666 struct nfs4_fs_locations *locations = NULL;
3668 page = alloc_page(GFP_KERNEL);
3671 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3672 if (locations == NULL)
3675 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3680 * If the fsid didn't change, this is a migration event, not a
3681 * referral. Cause us to drop into the exception handler, which
3682 * will kick off migration recovery.
3684 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3685 dprintk("%s: server did not return a different fsid for"
3686 " a referral at %s\n", __func__, name->name);
3687 status = -NFS4ERR_MOVED;
3690 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3691 nfs_fixup_referral_attributes(&locations->fattr);
3693 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3694 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3695 memset(fhandle, 0, sizeof(struct nfs_fh));
3703 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3704 struct nfs_fattr *fattr, struct nfs4_label *label)
3706 struct nfs4_getattr_arg args = {
3708 .bitmask = server->attr_bitmask,
3710 struct nfs4_getattr_res res = {
3715 struct rpc_message msg = {
3716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3721 args.bitmask = nfs4_bitmask(server, label);
3723 nfs_fattr_init(fattr);
3724 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3727 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3728 struct nfs_fattr *fattr, struct nfs4_label *label)
3730 struct nfs4_exception exception = { };
3733 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3734 trace_nfs4_getattr(server, fhandle, fattr, err);
3735 err = nfs4_handle_exception(server, err,
3737 } while (exception.retry);
3742 * The file is not closed if it is opened due to the a request to change
3743 * the size of the file. The open call will not be needed once the
3744 * VFS layer lookup-intents are implemented.
3746 * Close is called when the inode is destroyed.
3747 * If we haven't opened the file for O_WRONLY, we
3748 * need to in the size_change case to obtain a stateid.
3751 * Because OPEN is always done by name in nfsv4, it is
3752 * possible that we opened a different file by the same
3753 * name. We can recognize this race condition, but we
3754 * can't do anything about it besides returning an error.
3756 * This will be fixed with VFS changes (lookup-intent).
3759 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3760 struct iattr *sattr)
3762 struct inode *inode = d_inode(dentry);
3763 struct rpc_cred *cred = NULL;
3764 struct nfs_open_context *ctx = NULL;
3765 struct nfs4_label *label = NULL;
3768 if (pnfs_ld_layoutret_on_setattr(inode) &&
3769 sattr->ia_valid & ATTR_SIZE &&
3770 sattr->ia_size < i_size_read(inode))
3771 pnfs_commit_and_return_layout(inode);
3773 nfs_fattr_init(fattr);
3775 /* Deal with open(O_TRUNC) */
3776 if (sattr->ia_valid & ATTR_OPEN)
3777 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3779 /* Optimization: if the end result is no change, don't RPC */
3780 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3783 /* Search for an existing open(O_WRITE) file */
3784 if (sattr->ia_valid & ATTR_FILE) {
3786 ctx = nfs_file_open_context(sattr->ia_file);
3791 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3793 return PTR_ERR(label);
3795 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
3797 nfs_setattr_update_inode(inode, sattr, fattr);
3798 nfs_setsecurity(inode, fattr, label);
3800 nfs4_label_free(label);
3804 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3805 const struct qstr *name, struct nfs_fh *fhandle,
3806 struct nfs_fattr *fattr, struct nfs4_label *label)
3808 struct nfs_server *server = NFS_SERVER(dir);
3810 struct nfs4_lookup_arg args = {
3811 .bitmask = server->attr_bitmask,
3812 .dir_fh = NFS_FH(dir),
3815 struct nfs4_lookup_res res = {
3821 struct rpc_message msg = {
3822 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3827 args.bitmask = nfs4_bitmask(server, label);
3829 nfs_fattr_init(fattr);
3831 dprintk("NFS call lookup %s\n", name->name);
3832 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3833 dprintk("NFS reply lookup: %d\n", status);
3837 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3839 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3840 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3841 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3845 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3846 const struct qstr *name, struct nfs_fh *fhandle,
3847 struct nfs_fattr *fattr, struct nfs4_label *label)
3849 struct nfs4_exception exception = { };
3850 struct rpc_clnt *client = *clnt;
3853 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3854 trace_nfs4_lookup(dir, name, err);
3856 case -NFS4ERR_BADNAME:
3859 case -NFS4ERR_MOVED:
3860 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3861 if (err == -NFS4ERR_MOVED)
3862 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3864 case -NFS4ERR_WRONGSEC:
3866 if (client != *clnt)
3868 client = nfs4_negotiate_security(client, dir, name);
3870 return PTR_ERR(client);
3872 exception.retry = 1;
3875 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3877 } while (exception.retry);
3882 else if (client != *clnt)
3883 rpc_shutdown_client(client);
3888 static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
3889 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3890 struct nfs4_label *label)
3893 struct rpc_clnt *client = NFS_CLIENT(dir);
3895 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3896 if (client != NFS_CLIENT(dir)) {
3897 rpc_shutdown_client(client);
3898 nfs_fixup_secinfo_attributes(fattr);
3904 nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
3905 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3907 struct rpc_clnt *client = NFS_CLIENT(dir);
3910 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3912 return ERR_PTR(status);
3913 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3916 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3918 struct nfs_server *server = NFS_SERVER(inode);
3919 struct nfs4_accessargs args = {
3920 .fh = NFS_FH(inode),
3921 .bitmask = server->cache_consistency_bitmask,
3923 struct nfs4_accessres res = {
3926 struct rpc_message msg = {
3927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3930 .rpc_cred = entry->cred,
3932 int mode = entry->mask;
3936 * Determine which access bits we want to ask for...
3938 if (mode & MAY_READ)
3939 args.access |= NFS4_ACCESS_READ;
3940 if (S_ISDIR(inode->i_mode)) {
3941 if (mode & MAY_WRITE)
3942 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3943 if (mode & MAY_EXEC)
3944 args.access |= NFS4_ACCESS_LOOKUP;
3946 if (mode & MAY_WRITE)
3947 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3948 if (mode & MAY_EXEC)
3949 args.access |= NFS4_ACCESS_EXECUTE;
3952 res.fattr = nfs_alloc_fattr();
3953 if (res.fattr == NULL)
3956 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3958 nfs_access_set_mask(entry, res.access);
3959 nfs_refresh_inode(inode, res.fattr);
3961 nfs_free_fattr(res.fattr);
3965 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3967 struct nfs4_exception exception = { };
3970 err = _nfs4_proc_access(inode, entry);
3971 trace_nfs4_access(inode, err);
3972 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3974 } while (exception.retry);
3979 * TODO: For the time being, we don't try to get any attributes
3980 * along with any of the zero-copy operations READ, READDIR,
3983 * In the case of the first three, we want to put the GETATTR
3984 * after the read-type operation -- this is because it is hard
3985 * to predict the length of a GETATTR response in v4, and thus
3986 * align the READ data correctly. This means that the GETATTR
3987 * may end up partially falling into the page cache, and we should
3988 * shift it into the 'tail' of the xdr_buf before processing.
3989 * To do this efficiently, we need to know the total length
3990 * of data received, which doesn't seem to be available outside
3993 * In the case of WRITE, we also want to put the GETATTR after
3994 * the operation -- in this case because we want to make sure
3995 * we get the post-operation mtime and size.
3997 * Both of these changes to the XDR layer would in fact be quite
3998 * minor, but I decided to leave them for a subsequent patch.
4000 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
4001 unsigned int pgbase, unsigned int pglen)
4003 struct nfs4_readlink args = {
4004 .fh = NFS_FH(inode),
4009 struct nfs4_readlink_res res;
4010 struct rpc_message msg = {
4011 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4016 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
4019 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4020 unsigned int pgbase, unsigned int pglen)
4022 struct nfs4_exception exception = { };
4025 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4026 trace_nfs4_readlink(inode, err);
4027 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4029 } while (exception.retry);
4034 * This is just for mknod. open(O_CREAT) will always do ->open_context().
4037 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
4040 struct nfs_server *server = NFS_SERVER(dir);
4041 struct nfs4_label l, *ilabel = NULL;
4042 struct nfs_open_context *ctx;
4043 struct nfs4_state *state;
4046 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
4048 return PTR_ERR(ctx);
4050 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4052 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4053 sattr->ia_mode &= ~current_umask();
4054 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
4055 if (IS_ERR(state)) {
4056 status = PTR_ERR(state);
4060 nfs4_label_release_security(ilabel);
4061 put_nfs_open_context(ctx);
4065 static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
4067 struct nfs_server *server = NFS_SERVER(dir);
4068 struct nfs_removeargs args = {
4072 struct nfs_removeres res = {
4075 struct rpc_message msg = {
4076 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4080 unsigned long timestamp = jiffies;
4083 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
4085 update_changeattr(dir, &res.cinfo, timestamp);
4089 static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
4091 struct nfs4_exception exception = { };
4094 err = _nfs4_proc_remove(dir, name);
4095 trace_nfs4_remove(dir, name, err);
4096 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4098 } while (exception.retry);
4102 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
4104 struct nfs_server *server = NFS_SERVER(dir);
4105 struct nfs_removeargs *args = msg->rpc_argp;
4106 struct nfs_removeres *res = msg->rpc_resp;
4108 res->server = server;
4109 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
4110 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
4112 nfs_fattr_init(res->dir_attr);
4115 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4117 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb),
4118 &data->args.seq_args,
4123 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
4125 struct nfs_unlinkdata *data = task->tk_calldata;
4126 struct nfs_removeres *res = &data->res;
4128 if (!nfs4_sequence_done(task, &res->seq_res))
4130 if (nfs4_async_handle_error(task, res->server, NULL,
4131 &data->timeout) == -EAGAIN)
4133 if (task->tk_status == 0)
4134 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
4138 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4140 struct nfs_server *server = NFS_SERVER(dir);
4141 struct nfs_renameargs *arg = msg->rpc_argp;
4142 struct nfs_renameres *res = msg->rpc_resp;
4144 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
4145 res->server = server;
4146 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
4149 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4151 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
4152 &data->args.seq_args,
4157 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4158 struct inode *new_dir)
4160 struct nfs_renamedata *data = task->tk_calldata;
4161 struct nfs_renameres *res = &data->res;
4163 if (!nfs4_sequence_done(task, &res->seq_res))
4165 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
4168 if (task->tk_status == 0) {
4169 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
4170 if (new_dir != old_dir)
4171 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
4176 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4178 struct nfs_server *server = NFS_SERVER(inode);
4179 struct nfs4_link_arg arg = {
4180 .fh = NFS_FH(inode),
4181 .dir_fh = NFS_FH(dir),
4183 .bitmask = server->attr_bitmask,
4185 struct nfs4_link_res res = {
4189 struct rpc_message msg = {
4190 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4194 int status = -ENOMEM;
4196 res.fattr = nfs_alloc_fattr();
4197 if (res.fattr == NULL)
4200 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4201 if (IS_ERR(res.label)) {
4202 status = PTR_ERR(res.label);
4205 arg.bitmask = nfs4_bitmask(server, res.label);
4207 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4209 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
4210 status = nfs_post_op_update_inode(inode, res.fattr);
4212 nfs_setsecurity(inode, res.fattr, res.label);
4216 nfs4_label_free(res.label);
4219 nfs_free_fattr(res.fattr);
4223 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4225 struct nfs4_exception exception = { };
4228 err = nfs4_handle_exception(NFS_SERVER(inode),
4229 _nfs4_proc_link(inode, dir, name),
4231 } while (exception.retry);
4235 struct nfs4_createdata {
4236 struct rpc_message msg;
4237 struct nfs4_create_arg arg;
4238 struct nfs4_create_res res;
4240 struct nfs_fattr fattr;
4241 struct nfs4_label *label;
4244 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
4245 const struct qstr *name, struct iattr *sattr, u32 ftype)
4247 struct nfs4_createdata *data;
4249 data = kzalloc(sizeof(*data), GFP_KERNEL);
4251 struct nfs_server *server = NFS_SERVER(dir);
4253 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4254 if (IS_ERR(data->label))
4257 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4258 data->msg.rpc_argp = &data->arg;
4259 data->msg.rpc_resp = &data->res;
4260 data->arg.dir_fh = NFS_FH(dir);
4261 data->arg.server = server;
4262 data->arg.name = name;
4263 data->arg.attrs = sattr;
4264 data->arg.ftype = ftype;
4265 data->arg.bitmask = nfs4_bitmask(server, data->label);
4266 data->arg.umask = current_umask();
4267 data->res.server = server;
4268 data->res.fh = &data->fh;
4269 data->res.fattr = &data->fattr;
4270 data->res.label = data->label;
4271 nfs_fattr_init(data->res.fattr);
4279 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4281 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
4282 &data->arg.seq_args, &data->res.seq_res, 1);
4284 update_changeattr(dir, &data->res.dir_cinfo,
4285 data->res.fattr->time_start);
4286 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
4291 static void nfs4_free_createdata(struct nfs4_createdata *data)
4293 nfs4_label_free(data->label);
4297 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4298 struct page *page, unsigned int len, struct iattr *sattr,
4299 struct nfs4_label *label)
4301 struct nfs4_createdata *data;
4302 int status = -ENAMETOOLONG;
4304 if (len > NFS4_MAXPATHLEN)
4308 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4312 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4313 data->arg.u.symlink.pages = &page;
4314 data->arg.u.symlink.len = len;
4315 data->arg.label = label;
4317 status = nfs4_do_create(dir, dentry, data);
4319 nfs4_free_createdata(data);
4324 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4325 struct page *page, unsigned int len, struct iattr *sattr)
4327 struct nfs4_exception exception = { };
4328 struct nfs4_label l, *label = NULL;
4331 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4334 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4335 trace_nfs4_symlink(dir, &dentry->d_name, err);
4336 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4338 } while (exception.retry);
4340 nfs4_label_release_security(label);
4344 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4345 struct iattr *sattr, struct nfs4_label *label)
4347 struct nfs4_createdata *data;
4348 int status = -ENOMEM;
4350 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4354 data->arg.label = label;
4355 status = nfs4_do_create(dir, dentry, data);
4357 nfs4_free_createdata(data);
4362 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4363 struct iattr *sattr)
4365 struct nfs_server *server = NFS_SERVER(dir);
4366 struct nfs4_exception exception = { };
4367 struct nfs4_label l, *label = NULL;
4370 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4372 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4373 sattr->ia_mode &= ~current_umask();
4375 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4376 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4377 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4379 } while (exception.retry);
4380 nfs4_label_release_security(label);
4385 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4386 u64 cookie, struct page **pages, unsigned int count, int plus)
4388 struct inode *dir = d_inode(dentry);
4389 struct nfs4_readdir_arg args = {
4394 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
4397 struct nfs4_readdir_res res;
4398 struct rpc_message msg = {
4399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4406 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4408 (unsigned long long)cookie);
4409 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
4410 res.pgbase = args.pgbase;
4411 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4413 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
4414 status += args.pgbase;
4417 nfs_invalidate_atime(dir);
4419 dprintk("%s: returns %d\n", __func__, status);
4423 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4424 u64 cookie, struct page **pages, unsigned int count, int plus)
4426 struct nfs4_exception exception = { };
4429 err = _nfs4_proc_readdir(dentry, cred, cookie,
4430 pages, count, plus);
4431 trace_nfs4_readdir(d_inode(dentry), err);
4432 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
4434 } while (exception.retry);
4438 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4439 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4441 struct nfs4_createdata *data;
4442 int mode = sattr->ia_mode;
4443 int status = -ENOMEM;
4445 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4450 data->arg.ftype = NF4FIFO;
4451 else if (S_ISBLK(mode)) {
4452 data->arg.ftype = NF4BLK;
4453 data->arg.u.device.specdata1 = MAJOR(rdev);
4454 data->arg.u.device.specdata2 = MINOR(rdev);
4456 else if (S_ISCHR(mode)) {
4457 data->arg.ftype = NF4CHR;
4458 data->arg.u.device.specdata1 = MAJOR(rdev);
4459 data->arg.u.device.specdata2 = MINOR(rdev);
4460 } else if (!S_ISSOCK(mode)) {
4465 data->arg.label = label;
4466 status = nfs4_do_create(dir, dentry, data);
4468 nfs4_free_createdata(data);
4473 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4474 struct iattr *sattr, dev_t rdev)
4476 struct nfs_server *server = NFS_SERVER(dir);
4477 struct nfs4_exception exception = { };
4478 struct nfs4_label l, *label = NULL;
4481 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4483 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4484 sattr->ia_mode &= ~current_umask();
4486 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4487 trace_nfs4_mknod(dir, &dentry->d_name, err);
4488 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4490 } while (exception.retry);
4492 nfs4_label_release_security(label);
4497 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4498 struct nfs_fsstat *fsstat)
4500 struct nfs4_statfs_arg args = {
4502 .bitmask = server->attr_bitmask,
4504 struct nfs4_statfs_res res = {
4507 struct rpc_message msg = {
4508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4513 nfs_fattr_init(fsstat->fattr);
4514 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4517 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4519 struct nfs4_exception exception = { };
4522 err = nfs4_handle_exception(server,
4523 _nfs4_proc_statfs(server, fhandle, fsstat),
4525 } while (exception.retry);
4529 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4530 struct nfs_fsinfo *fsinfo)
4532 struct nfs4_fsinfo_arg args = {
4534 .bitmask = server->attr_bitmask,
4536 struct nfs4_fsinfo_res res = {
4539 struct rpc_message msg = {
4540 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4545 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4548 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4550 struct nfs4_exception exception = { };
4551 unsigned long now = jiffies;
4555 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4556 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4558 nfs4_set_lease_period(server->nfs_client,
4559 fsinfo->lease_time * HZ,
4563 err = nfs4_handle_exception(server, err, &exception);
4564 } while (exception.retry);
4568 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4572 nfs_fattr_init(fsinfo->fattr);
4573 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4575 /* block layout checks this! */
4576 server->pnfs_blksize = fsinfo->blksize;
4577 set_pnfs_layoutdriver(server, fhandle, fsinfo);
4583 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4584 struct nfs_pathconf *pathconf)
4586 struct nfs4_pathconf_arg args = {
4588 .bitmask = server->attr_bitmask,
4590 struct nfs4_pathconf_res res = {
4591 .pathconf = pathconf,
4593 struct rpc_message msg = {
4594 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4599 /* None of the pathconf attributes are mandatory to implement */
4600 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4601 memset(pathconf, 0, sizeof(*pathconf));
4605 nfs_fattr_init(pathconf->fattr);
4606 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4609 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4610 struct nfs_pathconf *pathconf)
4612 struct nfs4_exception exception = { };
4616 err = nfs4_handle_exception(server,
4617 _nfs4_proc_pathconf(server, fhandle, pathconf),
4619 } while (exception.retry);
4623 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4624 const struct nfs_open_context *ctx,
4625 const struct nfs_lock_context *l_ctx,
4628 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
4630 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4632 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4633 const struct nfs_open_context *ctx,
4634 const struct nfs_lock_context *l_ctx,
4637 nfs4_stateid current_stateid;
4639 /* If the current stateid represents a lost lock, then exit */
4640 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4642 return nfs4_stateid_match(stateid, ¤t_stateid);
4645 static bool nfs4_error_stateid_expired(int err)
4648 case -NFS4ERR_DELEG_REVOKED:
4649 case -NFS4ERR_ADMIN_REVOKED:
4650 case -NFS4ERR_BAD_STATEID:
4651 case -NFS4ERR_STALE_STATEID:
4652 case -NFS4ERR_OLD_STATEID:
4653 case -NFS4ERR_OPENMODE:
4654 case -NFS4ERR_EXPIRED:
4660 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4662 struct nfs_server *server = NFS_SERVER(hdr->inode);
4664 trace_nfs4_read(hdr, task->tk_status);
4665 if (task->tk_status < 0) {
4666 struct nfs4_exception exception = {
4667 .inode = hdr->inode,
4668 .state = hdr->args.context->state,
4669 .stateid = &hdr->args.stateid,
4671 task->tk_status = nfs4_async_handle_exception(task,
4672 server, task->tk_status, &exception);
4673 if (exception.retry) {
4674 rpc_restart_call_prepare(task);
4679 if (task->tk_status > 0)
4680 renew_lease(server, hdr->timestamp);
4684 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4685 struct nfs_pgio_args *args)
4688 if (!nfs4_error_stateid_expired(task->tk_status) ||
4689 nfs4_stateid_is_current(&args->stateid,
4694 rpc_restart_call_prepare(task);
4698 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4701 dprintk("--> %s\n", __func__);
4703 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4705 if (nfs4_read_stateid_changed(task, &hdr->args))
4707 if (task->tk_status > 0)
4708 nfs_invalidate_atime(hdr->inode);
4709 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4710 nfs4_read_done_cb(task, hdr);
4713 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4714 struct rpc_message *msg)
4716 hdr->timestamp = jiffies;
4717 if (!hdr->pgio_done_cb)
4718 hdr->pgio_done_cb = nfs4_read_done_cb;
4719 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4720 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4723 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4724 struct nfs_pgio_header *hdr)
4726 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4727 &hdr->args.seq_args,
4731 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4732 hdr->args.lock_context,
4733 hdr->rw_ops->rw_mode) == -EIO)
4735 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4740 static int nfs4_write_done_cb(struct rpc_task *task,
4741 struct nfs_pgio_header *hdr)
4743 struct inode *inode = hdr->inode;
4745 trace_nfs4_write(hdr, task->tk_status);
4746 if (task->tk_status < 0) {
4747 struct nfs4_exception exception = {
4748 .inode = hdr->inode,
4749 .state = hdr->args.context->state,
4750 .stateid = &hdr->args.stateid,
4752 task->tk_status = nfs4_async_handle_exception(task,
4753 NFS_SERVER(inode), task->tk_status,
4755 if (exception.retry) {
4756 rpc_restart_call_prepare(task);
4760 if (task->tk_status >= 0) {
4761 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4762 nfs_writeback_update_inode(hdr);
4767 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4768 struct nfs_pgio_args *args)
4771 if (!nfs4_error_stateid_expired(task->tk_status) ||
4772 nfs4_stateid_is_current(&args->stateid,
4777 rpc_restart_call_prepare(task);
4781 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4783 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4785 if (nfs4_write_stateid_changed(task, &hdr->args))
4787 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4788 nfs4_write_done_cb(task, hdr);
4792 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4794 /* Don't request attributes for pNFS or O_DIRECT writes */
4795 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4797 /* Otherwise, request attributes if and only if we don't hold
4800 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4803 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4804 struct rpc_message *msg)
4806 struct nfs_server *server = NFS_SERVER(hdr->inode);
4808 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4809 hdr->args.bitmask = NULL;
4810 hdr->res.fattr = NULL;
4812 hdr->args.bitmask = server->cache_consistency_bitmask;
4814 if (!hdr->pgio_done_cb)
4815 hdr->pgio_done_cb = nfs4_write_done_cb;
4816 hdr->res.server = server;
4817 hdr->timestamp = jiffies;
4819 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4820 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4823 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4825 nfs4_setup_sequence(NFS_SERVER(data->inode),
4826 &data->args.seq_args,
4831 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4833 struct inode *inode = data->inode;
4835 trace_nfs4_commit(data, task->tk_status);
4836 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4837 NULL, NULL) == -EAGAIN) {
4838 rpc_restart_call_prepare(task);
4844 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4846 if (!nfs4_sequence_done(task, &data->res.seq_res))
4848 return data->commit_done_cb(task, data);
4851 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4853 struct nfs_server *server = NFS_SERVER(data->inode);
4855 if (data->commit_done_cb == NULL)
4856 data->commit_done_cb = nfs4_commit_done_cb;
4857 data->res.server = server;
4858 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4859 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4862 struct nfs4_renewdata {
4863 struct nfs_client *client;
4864 unsigned long timestamp;
4868 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4869 * standalone procedure for queueing an asynchronous RENEW.
4871 static void nfs4_renew_release(void *calldata)
4873 struct nfs4_renewdata *data = calldata;
4874 struct nfs_client *clp = data->client;
4876 if (atomic_read(&clp->cl_count) > 1)
4877 nfs4_schedule_state_renewal(clp);
4878 nfs_put_client(clp);
4882 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4884 struct nfs4_renewdata *data = calldata;
4885 struct nfs_client *clp = data->client;
4886 unsigned long timestamp = data->timestamp;
4888 trace_nfs4_renew_async(clp, task->tk_status);
4889 switch (task->tk_status) {
4892 case -NFS4ERR_LEASE_MOVED:
4893 nfs4_schedule_lease_moved_recovery(clp);
4896 /* Unless we're shutting down, schedule state recovery! */
4897 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4899 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4900 nfs4_schedule_lease_recovery(clp);
4903 nfs4_schedule_path_down_recovery(clp);
4905 do_renew_lease(clp, timestamp);
4908 static const struct rpc_call_ops nfs4_renew_ops = {
4909 .rpc_call_done = nfs4_renew_done,
4910 .rpc_release = nfs4_renew_release,
4913 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4915 struct rpc_message msg = {
4916 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4920 struct nfs4_renewdata *data;
4922 if (renew_flags == 0)
4924 if (!atomic_inc_not_zero(&clp->cl_count))
4926 data = kmalloc(sizeof(*data), GFP_NOFS);
4930 data->timestamp = jiffies;
4931 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4932 &nfs4_renew_ops, data);
4935 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4937 struct rpc_message msg = {
4938 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4942 unsigned long now = jiffies;
4945 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4948 do_renew_lease(clp, now);
4952 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4954 return server->caps & NFS_CAP_ACLS;
4957 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4958 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4961 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4963 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4964 struct page **pages)
4966 struct page *newpage, **spages;
4972 len = min_t(size_t, PAGE_SIZE, buflen);
4973 newpage = alloc_page(GFP_KERNEL);
4975 if (newpage == NULL)
4977 memcpy(page_address(newpage), buf, len);
4982 } while (buflen != 0);
4988 __free_page(spages[rc-1]);
4992 struct nfs4_cached_acl {
4998 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
5000 struct nfs_inode *nfsi = NFS_I(inode);
5002 spin_lock(&inode->i_lock);
5003 kfree(nfsi->nfs4_acl);
5004 nfsi->nfs4_acl = acl;
5005 spin_unlock(&inode->i_lock);
5008 static void nfs4_zap_acl_attr(struct inode *inode)
5010 nfs4_set_cached_acl(inode, NULL);
5013 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
5015 struct nfs_inode *nfsi = NFS_I(inode);
5016 struct nfs4_cached_acl *acl;
5019 spin_lock(&inode->i_lock);
5020 acl = nfsi->nfs4_acl;
5023 if (buf == NULL) /* user is just asking for length */
5025 if (acl->cached == 0)
5027 ret = -ERANGE; /* see getxattr(2) man page */
5028 if (acl->len > buflen)
5030 memcpy(buf, acl->data, acl->len);
5034 spin_unlock(&inode->i_lock);
5038 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
5040 struct nfs4_cached_acl *acl;
5041 size_t buflen = sizeof(*acl) + acl_len;
5043 if (buflen <= PAGE_SIZE) {
5044 acl = kmalloc(buflen, GFP_KERNEL);
5048 _copy_from_pages(acl->data, pages, pgbase, acl_len);
5050 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5057 nfs4_set_cached_acl(inode, acl);
5061 * The getxattr API returns the required buffer length when called with a
5062 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5063 * the required buf. On a NULL buf, we send a page of data to the server
5064 * guessing that the ACL request can be serviced by a page. If so, we cache
5065 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5066 * the cache. If not so, we throw away the page, and cache the required
5067 * length. The next getxattr call will then produce another round trip to
5068 * the server, this time with the input buf of the required size.
5070 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5072 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
5073 struct nfs_getaclargs args = {
5074 .fh = NFS_FH(inode),
5078 struct nfs_getaclres res = {
5081 struct rpc_message msg = {
5082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5086 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5087 int ret = -ENOMEM, i;
5089 /* As long as we're doing a round trip to the server anyway,
5090 * let's be prepared for a page of acl data. */
5093 if (npages > ARRAY_SIZE(pages))
5096 for (i = 0; i < npages; i++) {
5097 pages[i] = alloc_page(GFP_KERNEL);
5102 /* for decoding across pages */
5103 res.acl_scratch = alloc_page(GFP_KERNEL);
5104 if (!res.acl_scratch)
5107 args.acl_len = npages * PAGE_SIZE;
5109 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
5110 __func__, buf, buflen, npages, args.acl_len);
5111 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5112 &msg, &args.seq_args, &res.seq_res, 0);
5116 /* Handle the case where the passed-in buffer is too short */
5117 if (res.acl_flags & NFS4_ACL_TRUNC) {
5118 /* Did the user only issue a request for the acl length? */
5124 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
5126 if (res.acl_len > buflen) {
5130 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
5135 for (i = 0; i < npages; i++)
5137 __free_page(pages[i]);
5138 if (res.acl_scratch)
5139 __free_page(res.acl_scratch);
5143 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5145 struct nfs4_exception exception = { };
5148 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
5149 trace_nfs4_get_acl(inode, ret);
5152 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5153 } while (exception.retry);
5157 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5159 struct nfs_server *server = NFS_SERVER(inode);
5162 if (!nfs4_server_supports_acls(server))
5164 ret = nfs_revalidate_inode(server, inode);
5167 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5168 nfs_zap_acl_cache(inode);
5169 ret = nfs4_read_cached_acl(inode, buf, buflen);
5171 /* -ENOENT is returned if there is no ACL or if there is an ACL
5172 * but no cached acl data, just the acl length */
5174 return nfs4_get_acl_uncached(inode, buf, buflen);
5177 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5179 struct nfs_server *server = NFS_SERVER(inode);
5180 struct page *pages[NFS4ACL_MAXPAGES];
5181 struct nfs_setaclargs arg = {
5182 .fh = NFS_FH(inode),
5186 struct nfs_setaclres res;
5187 struct rpc_message msg = {
5188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5192 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5195 if (!nfs4_server_supports_acls(server))
5197 if (npages > ARRAY_SIZE(pages))
5199 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
5202 nfs4_inode_return_delegation(inode);
5203 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5206 * Free each page after tx, so the only ref left is
5207 * held by the network stack
5210 put_page(pages[i-1]);
5213 * Acl update can result in inode attribute update.
5214 * so mark the attribute cache invalid.
5216 spin_lock(&inode->i_lock);
5217 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5218 spin_unlock(&inode->i_lock);
5219 nfs_access_zap_cache(inode);
5220 nfs_zap_acl_cache(inode);
5224 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5226 struct nfs4_exception exception = { };
5229 err = __nfs4_proc_set_acl(inode, buf, buflen);
5230 trace_nfs4_set_acl(inode, err);
5231 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5233 } while (exception.retry);
5237 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
5238 static int _nfs4_get_security_label(struct inode *inode, void *buf,
5241 struct nfs_server *server = NFS_SERVER(inode);
5242 struct nfs_fattr fattr;
5243 struct nfs4_label label = {0, 0, buflen, buf};
5245 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5246 struct nfs4_getattr_arg arg = {
5247 .fh = NFS_FH(inode),
5250 struct nfs4_getattr_res res = {
5255 struct rpc_message msg = {
5256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
5262 nfs_fattr_init(&fattr);
5264 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
5267 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5269 if (buflen < label.len)
5274 static int nfs4_get_security_label(struct inode *inode, void *buf,
5277 struct nfs4_exception exception = { };
5280 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5284 err = _nfs4_get_security_label(inode, buf, buflen);
5285 trace_nfs4_get_security_label(inode, err);
5286 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5288 } while (exception.retry);
5292 static int _nfs4_do_set_security_label(struct inode *inode,
5293 struct nfs4_label *ilabel,
5294 struct nfs_fattr *fattr,
5295 struct nfs4_label *olabel)
5298 struct iattr sattr = {0};
5299 struct nfs_server *server = NFS_SERVER(inode);
5300 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5301 struct nfs_setattrargs arg = {
5302 .fh = NFS_FH(inode),
5308 struct nfs_setattrres res = {
5313 struct rpc_message msg = {
5314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5320 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
5322 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5324 dprintk("%s failed: %d\n", __func__, status);
5329 static int nfs4_do_set_security_label(struct inode *inode,
5330 struct nfs4_label *ilabel,
5331 struct nfs_fattr *fattr,
5332 struct nfs4_label *olabel)
5334 struct nfs4_exception exception = { };
5338 err = _nfs4_do_set_security_label(inode, ilabel,
5340 trace_nfs4_set_security_label(inode, err);
5341 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5343 } while (exception.retry);
5348 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
5350 struct nfs4_label ilabel, *olabel = NULL;
5351 struct nfs_fattr fattr;
5352 struct rpc_cred *cred;
5355 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5358 nfs_fattr_init(&fattr);
5362 ilabel.label = (char *)buf;
5363 ilabel.len = buflen;
5365 cred = rpc_lookup_cred();
5367 return PTR_ERR(cred);
5369 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5370 if (IS_ERR(olabel)) {
5371 status = -PTR_ERR(olabel);
5375 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5377 nfs_setsecurity(inode, &fattr, olabel);
5379 nfs4_label_free(olabel);
5384 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5387 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5388 nfs4_verifier *bootverf)
5392 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5393 /* An impossible timestamp guarantees this value
5394 * will never match a generated boot time. */
5395 verf[0] = cpu_to_be32(U32_MAX);
5396 verf[1] = cpu_to_be32(U32_MAX);
5398 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5399 u64 ns = ktime_to_ns(nn->boot_time);
5401 verf[0] = cpu_to_be32(ns >> 32);
5402 verf[1] = cpu_to_be32(ns);
5404 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5408 nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5413 if (clp->cl_owner_id != NULL)
5417 len = 14 + strlen(clp->cl_ipaddr) + 1 +
5418 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5420 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5424 if (len > NFS4_OPAQUE_LIMIT + 1)
5428 * Since this string is allocated at mount time, and held until the
5429 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5430 * about a memory-reclaim deadlock.
5432 str = kmalloc(len, GFP_KERNEL);
5437 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5439 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5440 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
5443 clp->cl_owner_id = str;
5448 nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5453 len = 10 + 10 + 1 + 10 + 1 +
5454 strlen(nfs4_client_id_uniquifier) + 1 +
5455 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5457 if (len > NFS4_OPAQUE_LIMIT + 1)
5461 * Since this string is allocated at mount time, and held until the
5462 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5463 * about a memory-reclaim deadlock.
5465 str = kmalloc(len, GFP_KERNEL);
5469 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5470 clp->rpc_ops->version, clp->cl_minorversion,
5471 nfs4_client_id_uniquifier,
5472 clp->cl_rpcclient->cl_nodename);
5473 clp->cl_owner_id = str;
5478 nfs4_init_uniform_client_string(struct nfs_client *clp)
5483 if (clp->cl_owner_id != NULL)
5486 if (nfs4_client_id_uniquifier[0] != '\0')
5487 return nfs4_init_uniquifier_client_string(clp);
5489 len = 10 + 10 + 1 + 10 + 1 +
5490 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5492 if (len > NFS4_OPAQUE_LIMIT + 1)
5496 * Since this string is allocated at mount time, and held until the
5497 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5498 * about a memory-reclaim deadlock.
5500 str = kmalloc(len, GFP_KERNEL);
5504 scnprintf(str, len, "Linux NFSv%u.%u %s",
5505 clp->rpc_ops->version, clp->cl_minorversion,
5506 clp->cl_rpcclient->cl_nodename);
5507 clp->cl_owner_id = str;
5512 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5513 * services. Advertise one based on the address family of the
5517 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5519 if (strchr(clp->cl_ipaddr, ':') != NULL)
5520 return scnprintf(buf, len, "tcp6");
5522 return scnprintf(buf, len, "tcp");
5525 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5527 struct nfs4_setclientid *sc = calldata;
5529 if (task->tk_status == 0)
5530 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5533 static const struct rpc_call_ops nfs4_setclientid_ops = {
5534 .rpc_call_done = nfs4_setclientid_done,
5538 * nfs4_proc_setclientid - Negotiate client ID
5539 * @clp: state data structure
5540 * @program: RPC program for NFSv4 callback service
5541 * @port: IP port number for NFS4 callback service
5542 * @cred: RPC credential to use for this call
5543 * @res: where to place the result
5545 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5547 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5548 unsigned short port, struct rpc_cred *cred,
5549 struct nfs4_setclientid_res *res)
5551 nfs4_verifier sc_verifier;
5552 struct nfs4_setclientid setclientid = {
5553 .sc_verifier = &sc_verifier,
5557 struct rpc_message msg = {
5558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5559 .rpc_argp = &setclientid,
5563 struct rpc_task *task;
5564 struct rpc_task_setup task_setup_data = {
5565 .rpc_client = clp->cl_rpcclient,
5566 .rpc_message = &msg,
5567 .callback_ops = &nfs4_setclientid_ops,
5568 .callback_data = &setclientid,
5569 .flags = RPC_TASK_TIMEOUT,
5573 /* nfs_client_id4 */
5574 nfs4_init_boot_verifier(clp, &sc_verifier);
5576 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5577 status = nfs4_init_uniform_client_string(clp);
5579 status = nfs4_init_nonuniform_client_string(clp);
5585 setclientid.sc_netid_len =
5586 nfs4_init_callback_netid(clp,
5587 setclientid.sc_netid,
5588 sizeof(setclientid.sc_netid));
5589 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5590 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5591 clp->cl_ipaddr, port >> 8, port & 255);
5593 dprintk("NFS call setclientid auth=%s, '%s'\n",
5594 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5596 task = rpc_run_task(&task_setup_data);
5598 status = PTR_ERR(task);
5601 status = task->tk_status;
5602 if (setclientid.sc_cred) {
5603 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5604 put_rpccred(setclientid.sc_cred);
5608 trace_nfs4_setclientid(clp, status);
5609 dprintk("NFS reply setclientid: %d\n", status);
5614 * nfs4_proc_setclientid_confirm - Confirm client ID
5615 * @clp: state data structure
5616 * @res: result of a previous SETCLIENTID
5617 * @cred: RPC credential to use for this call
5619 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5621 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5622 struct nfs4_setclientid_res *arg,
5623 struct rpc_cred *cred)
5625 struct rpc_message msg = {
5626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5632 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5633 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5635 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5636 trace_nfs4_setclientid_confirm(clp, status);
5637 dprintk("NFS reply setclientid_confirm: %d\n", status);
5641 struct nfs4_delegreturndata {
5642 struct nfs4_delegreturnargs args;
5643 struct nfs4_delegreturnres res;
5645 nfs4_stateid stateid;
5646 unsigned long timestamp;
5648 struct nfs4_layoutreturn_args arg;
5649 struct nfs4_layoutreturn_res res;
5650 struct nfs4_xdr_opaque_data ld_private;
5654 struct nfs_fattr fattr;
5656 struct inode *inode;
5659 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5661 struct nfs4_delegreturndata *data = calldata;
5663 if (!nfs4_sequence_done(task, &data->res.seq_res))
5666 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5668 /* Handle Layoutreturn errors */
5669 if (data->args.lr_args && task->tk_status != 0) {
5670 switch(data->res.lr_ret) {
5672 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5675 data->args.lr_args = NULL;
5676 data->res.lr_res = NULL;
5678 case -NFS4ERR_ADMIN_REVOKED:
5679 case -NFS4ERR_DELEG_REVOKED:
5680 case -NFS4ERR_EXPIRED:
5681 case -NFS4ERR_BAD_STATEID:
5682 case -NFS4ERR_OLD_STATEID:
5683 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5684 case -NFS4ERR_WRONG_CRED:
5685 data->args.lr_args = NULL;
5686 data->res.lr_res = NULL;
5687 data->res.lr_ret = 0;
5688 rpc_restart_call_prepare(task);
5693 switch (task->tk_status) {
5695 renew_lease(data->res.server, data->timestamp);
5697 case -NFS4ERR_ADMIN_REVOKED:
5698 case -NFS4ERR_DELEG_REVOKED:
5699 case -NFS4ERR_EXPIRED:
5700 nfs4_free_revoked_stateid(data->res.server,
5702 task->tk_msg.rpc_cred);
5703 case -NFS4ERR_BAD_STATEID:
5704 case -NFS4ERR_OLD_STATEID:
5705 case -NFS4ERR_STALE_STATEID:
5706 task->tk_status = 0;
5708 case -NFS4ERR_ACCESS:
5709 if (data->args.bitmask) {
5710 data->args.bitmask = NULL;
5711 data->res.fattr = NULL;
5712 task->tk_status = 0;
5713 rpc_restart_call_prepare(task);
5717 if (nfs4_async_handle_error(task, data->res.server,
5718 NULL, NULL) == -EAGAIN) {
5719 rpc_restart_call_prepare(task);
5723 data->rpc_status = task->tk_status;
5726 static void nfs4_delegreturn_release(void *calldata)
5728 struct nfs4_delegreturndata *data = calldata;
5729 struct inode *inode = data->inode;
5733 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5735 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5736 nfs_iput_and_deactive(inode);
5741 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5743 struct nfs4_delegreturndata *d_data;
5745 d_data = (struct nfs4_delegreturndata *)data;
5747 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
5750 nfs4_setup_sequence(d_data->res.server,
5751 &d_data->args.seq_args,
5752 &d_data->res.seq_res,
5756 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5757 .rpc_call_prepare = nfs4_delegreturn_prepare,
5758 .rpc_call_done = nfs4_delegreturn_done,
5759 .rpc_release = nfs4_delegreturn_release,
5762 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5764 struct nfs4_delegreturndata *data;
5765 struct nfs_server *server = NFS_SERVER(inode);
5766 struct rpc_task *task;
5767 struct rpc_message msg = {
5768 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5771 struct rpc_task_setup task_setup_data = {
5772 .rpc_client = server->client,
5773 .rpc_message = &msg,
5774 .callback_ops = &nfs4_delegreturn_ops,
5775 .flags = RPC_TASK_ASYNC,
5779 data = kzalloc(sizeof(*data), GFP_NOFS);
5782 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5784 nfs4_state_protect(server->nfs_client,
5785 NFS_SP4_MACH_CRED_CLEANUP,
5786 &task_setup_data.rpc_client, &msg);
5788 data->args.fhandle = &data->fh;
5789 data->args.stateid = &data->stateid;
5790 data->args.bitmask = server->cache_consistency_bitmask;
5791 nfs_copy_fh(&data->fh, NFS_FH(inode));
5792 nfs4_stateid_copy(&data->stateid, stateid);
5793 data->res.fattr = &data->fattr;
5794 data->res.server = server;
5795 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5796 data->lr.arg.ld_private = &data->lr.ld_private;
5797 nfs_fattr_init(data->res.fattr);
5798 data->timestamp = jiffies;
5799 data->rpc_status = 0;
5800 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
5801 data->inode = nfs_igrab_and_active(inode);
5804 data->args.lr_args = &data->lr.arg;
5805 data->res.lr_res = &data->lr.res;
5807 } else if (data->lr.roc) {
5808 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5809 data->lr.roc = false;
5812 task_setup_data.callback_data = data;
5813 msg.rpc_argp = &data->args;
5814 msg.rpc_resp = &data->res;
5815 task = rpc_run_task(&task_setup_data);
5817 return PTR_ERR(task);
5820 status = nfs4_wait_for_completion_rpc_task(task);
5823 status = data->rpc_status;
5829 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5831 struct nfs_server *server = NFS_SERVER(inode);
5832 struct nfs4_exception exception = { };
5835 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5836 trace_nfs4_delegreturn(inode, stateid, err);
5838 case -NFS4ERR_STALE_STATEID:
5839 case -NFS4ERR_EXPIRED:
5843 err = nfs4_handle_exception(server, err, &exception);
5844 } while (exception.retry);
5848 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5850 struct inode *inode = state->inode;
5851 struct nfs_server *server = NFS_SERVER(inode);
5852 struct nfs_client *clp = server->nfs_client;
5853 struct nfs_lockt_args arg = {
5854 .fh = NFS_FH(inode),
5857 struct nfs_lockt_res res = {
5860 struct rpc_message msg = {
5861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5864 .rpc_cred = state->owner->so_cred,
5866 struct nfs4_lock_state *lsp;
5869 arg.lock_owner.clientid = clp->cl_clientid;
5870 status = nfs4_set_lock_state(state, request);
5873 lsp = request->fl_u.nfs4_fl.owner;
5874 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5875 arg.lock_owner.s_dev = server->s_dev;
5876 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5879 request->fl_type = F_UNLCK;
5881 case -NFS4ERR_DENIED:
5884 request->fl_ops->fl_release_private(request);
5885 request->fl_ops = NULL;
5890 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5892 struct nfs4_exception exception = { };
5896 err = _nfs4_proc_getlk(state, cmd, request);
5897 trace_nfs4_get_lock(request, state, cmd, err);
5898 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5900 } while (exception.retry);
5904 struct nfs4_unlockdata {
5905 struct nfs_locku_args arg;
5906 struct nfs_locku_res res;
5907 struct nfs4_lock_state *lsp;
5908 struct nfs_open_context *ctx;
5909 struct file_lock fl;
5910 struct nfs_server *server;
5911 unsigned long timestamp;
5914 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5915 struct nfs_open_context *ctx,
5916 struct nfs4_lock_state *lsp,
5917 struct nfs_seqid *seqid)
5919 struct nfs4_unlockdata *p;
5920 struct inode *inode = lsp->ls_state->inode;
5922 p = kzalloc(sizeof(*p), GFP_NOFS);
5925 p->arg.fh = NFS_FH(inode);
5927 p->arg.seqid = seqid;
5928 p->res.seqid = seqid;
5930 atomic_inc(&lsp->ls_count);
5931 /* Ensure we don't close file until we're done freeing locks! */
5932 p->ctx = get_nfs_open_context(ctx);
5933 memcpy(&p->fl, fl, sizeof(p->fl));
5934 p->server = NFS_SERVER(inode);
5938 static void nfs4_locku_release_calldata(void *data)
5940 struct nfs4_unlockdata *calldata = data;
5941 nfs_free_seqid(calldata->arg.seqid);
5942 nfs4_put_lock_state(calldata->lsp);
5943 put_nfs_open_context(calldata->ctx);
5947 static void nfs4_locku_done(struct rpc_task *task, void *data)
5949 struct nfs4_unlockdata *calldata = data;
5951 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5953 switch (task->tk_status) {
5955 renew_lease(calldata->server, calldata->timestamp);
5956 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
5957 if (nfs4_update_lock_stateid(calldata->lsp,
5958 &calldata->res.stateid))
5960 case -NFS4ERR_ADMIN_REVOKED:
5961 case -NFS4ERR_EXPIRED:
5962 nfs4_free_revoked_stateid(calldata->server,
5963 &calldata->arg.stateid,
5964 task->tk_msg.rpc_cred);
5965 case -NFS4ERR_BAD_STATEID:
5966 case -NFS4ERR_OLD_STATEID:
5967 case -NFS4ERR_STALE_STATEID:
5968 if (!nfs4_stateid_match(&calldata->arg.stateid,
5969 &calldata->lsp->ls_stateid))
5970 rpc_restart_call_prepare(task);
5973 if (nfs4_async_handle_error(task, calldata->server,
5974 NULL, NULL) == -EAGAIN)
5975 rpc_restart_call_prepare(task);
5977 nfs_release_seqid(calldata->arg.seqid);
5980 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5982 struct nfs4_unlockdata *calldata = data;
5984 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5986 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
5987 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5988 /* Note: exit _without_ running nfs4_locku_done */
5991 calldata->timestamp = jiffies;
5992 if (nfs4_setup_sequence(calldata->server,
5993 &calldata->arg.seq_args,
5994 &calldata->res.seq_res,
5996 nfs_release_seqid(calldata->arg.seqid);
5999 task->tk_action = NULL;
6001 nfs4_sequence_done(task, &calldata->res.seq_res);
6004 static const struct rpc_call_ops nfs4_locku_ops = {
6005 .rpc_call_prepare = nfs4_locku_prepare,
6006 .rpc_call_done = nfs4_locku_done,
6007 .rpc_release = nfs4_locku_release_calldata,
6010 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
6011 struct nfs_open_context *ctx,
6012 struct nfs4_lock_state *lsp,
6013 struct nfs_seqid *seqid)
6015 struct nfs4_unlockdata *data;
6016 struct rpc_message msg = {
6017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
6018 .rpc_cred = ctx->cred,
6020 struct rpc_task_setup task_setup_data = {
6021 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
6022 .rpc_message = &msg,
6023 .callback_ops = &nfs4_locku_ops,
6024 .workqueue = nfsiod_workqueue,
6025 .flags = RPC_TASK_ASYNC,
6028 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
6029 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
6031 /* Ensure this is an unlock - when canceling a lock, the
6032 * canceled lock is passed in, and it won't be an unlock.
6034 fl->fl_type = F_UNLCK;
6036 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6038 nfs_free_seqid(seqid);
6039 return ERR_PTR(-ENOMEM);
6042 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
6043 msg.rpc_argp = &data->arg;
6044 msg.rpc_resp = &data->res;
6045 task_setup_data.callback_data = data;
6046 return rpc_run_task(&task_setup_data);
6049 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6051 struct inode *inode = state->inode;
6052 struct nfs4_state_owner *sp = state->owner;
6053 struct nfs_inode *nfsi = NFS_I(inode);
6054 struct nfs_seqid *seqid;
6055 struct nfs4_lock_state *lsp;
6056 struct rpc_task *task;
6057 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6059 unsigned char fl_flags = request->fl_flags;
6061 status = nfs4_set_lock_state(state, request);
6062 /* Unlock _before_ we do the RPC call */
6063 request->fl_flags |= FL_EXISTS;
6064 /* Exclude nfs_delegation_claim_locks() */
6065 mutex_lock(&sp->so_delegreturn_mutex);
6066 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
6067 down_read(&nfsi->rwsem);
6068 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
6069 up_read(&nfsi->rwsem);
6070 mutex_unlock(&sp->so_delegreturn_mutex);
6073 up_read(&nfsi->rwsem);
6074 mutex_unlock(&sp->so_delegreturn_mutex);
6077 /* Is this a delegated lock? */
6078 lsp = request->fl_u.nfs4_fl.owner;
6079 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6081 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6082 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
6086 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
6087 status = PTR_ERR(task);
6090 status = nfs4_wait_for_completion_rpc_task(task);
6093 request->fl_flags = fl_flags;
6094 trace_nfs4_unlock(request, state, F_SETLK, status);
6098 struct nfs4_lockdata {
6099 struct nfs_lock_args arg;
6100 struct nfs_lock_res res;
6101 struct nfs4_lock_state *lsp;
6102 struct nfs_open_context *ctx;
6103 struct file_lock fl;
6104 unsigned long timestamp;
6107 struct nfs_server *server;
6110 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
6111 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6114 struct nfs4_lockdata *p;
6115 struct inode *inode = lsp->ls_state->inode;
6116 struct nfs_server *server = NFS_SERVER(inode);
6117 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
6119 p = kzalloc(sizeof(*p), gfp_mask);
6123 p->arg.fh = NFS_FH(inode);
6125 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
6126 if (IS_ERR(p->arg.open_seqid))
6128 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6129 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
6130 if (IS_ERR(p->arg.lock_seqid))
6131 goto out_free_seqid;
6132 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
6133 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
6134 p->arg.lock_owner.s_dev = server->s_dev;
6135 p->res.lock_seqid = p->arg.lock_seqid;
6138 atomic_inc(&lsp->ls_count);
6139 p->ctx = get_nfs_open_context(ctx);
6140 memcpy(&p->fl, fl, sizeof(p->fl));
6143 nfs_free_seqid(p->arg.open_seqid);
6149 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6151 struct nfs4_lockdata *data = calldata;
6152 struct nfs4_state *state = data->lsp->ls_state;
6154 dprintk("%s: begin!\n", __func__);
6155 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
6157 /* Do we need to do an open_to_lock_owner? */
6158 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
6159 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
6160 goto out_release_lock_seqid;
6162 nfs4_stateid_copy(&data->arg.open_stateid,
6163 &state->open_stateid);
6164 data->arg.new_lock_owner = 1;
6165 data->res.open_seqid = data->arg.open_seqid;
6167 data->arg.new_lock_owner = 0;
6168 nfs4_stateid_copy(&data->arg.lock_stateid,
6169 &data->lsp->ls_stateid);
6171 if (!nfs4_valid_open_stateid(state)) {
6172 data->rpc_status = -EBADF;
6173 task->tk_action = NULL;
6174 goto out_release_open_seqid;
6176 data->timestamp = jiffies;
6177 if (nfs4_setup_sequence(data->server,
6178 &data->arg.seq_args,
6182 out_release_open_seqid:
6183 nfs_release_seqid(data->arg.open_seqid);
6184 out_release_lock_seqid:
6185 nfs_release_seqid(data->arg.lock_seqid);
6187 nfs4_sequence_done(task, &data->res.seq_res);
6188 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
6191 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6193 struct nfs4_lockdata *data = calldata;
6194 struct nfs4_lock_state *lsp = data->lsp;
6196 dprintk("%s: begin!\n", __func__);
6198 if (!nfs4_sequence_done(task, &data->res.seq_res))
6201 data->rpc_status = task->tk_status;
6202 switch (task->tk_status) {
6204 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
6206 if (data->arg.new_lock) {
6207 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
6208 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
6209 rpc_restart_call_prepare(task);
6213 if (data->arg.new_lock_owner != 0) {
6214 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6215 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6216 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6217 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6218 rpc_restart_call_prepare(task);
6220 case -NFS4ERR_BAD_STATEID:
6221 case -NFS4ERR_OLD_STATEID:
6222 case -NFS4ERR_STALE_STATEID:
6223 case -NFS4ERR_EXPIRED:
6224 if (data->arg.new_lock_owner != 0) {
6225 if (!nfs4_stateid_match(&data->arg.open_stateid,
6226 &lsp->ls_state->open_stateid))
6227 rpc_restart_call_prepare(task);
6228 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6230 rpc_restart_call_prepare(task);
6232 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6235 static void nfs4_lock_release(void *calldata)
6237 struct nfs4_lockdata *data = calldata;
6239 dprintk("%s: begin!\n", __func__);
6240 nfs_free_seqid(data->arg.open_seqid);
6241 if (data->cancelled != 0) {
6242 struct rpc_task *task;
6243 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6244 data->arg.lock_seqid);
6246 rpc_put_task_async(task);
6247 dprintk("%s: cancelling lock!\n", __func__);
6249 nfs_free_seqid(data->arg.lock_seqid);
6250 nfs4_put_lock_state(data->lsp);
6251 put_nfs_open_context(data->ctx);
6253 dprintk("%s: done!\n", __func__);
6256 static const struct rpc_call_ops nfs4_lock_ops = {
6257 .rpc_call_prepare = nfs4_lock_prepare,
6258 .rpc_call_done = nfs4_lock_done,
6259 .rpc_release = nfs4_lock_release,
6262 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6265 case -NFS4ERR_ADMIN_REVOKED:
6266 case -NFS4ERR_EXPIRED:
6267 case -NFS4ERR_BAD_STATEID:
6268 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6269 if (new_lock_owner != 0 ||
6270 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
6271 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
6273 case -NFS4ERR_STALE_STATEID:
6274 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6275 nfs4_schedule_lease_recovery(server->nfs_client);
6279 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
6281 struct nfs4_lockdata *data;
6282 struct rpc_task *task;
6283 struct rpc_message msg = {
6284 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6285 .rpc_cred = state->owner->so_cred,
6287 struct rpc_task_setup task_setup_data = {
6288 .rpc_client = NFS_CLIENT(state->inode),
6289 .rpc_message = &msg,
6290 .callback_ops = &nfs4_lock_ops,
6291 .workqueue = nfsiod_workqueue,
6292 .flags = RPC_TASK_ASYNC,
6296 dprintk("%s: begin!\n", __func__);
6297 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
6298 fl->fl_u.nfs4_fl.owner,
6299 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
6303 data->arg.block = 1;
6304 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
6305 msg.rpc_argp = &data->arg;
6306 msg.rpc_resp = &data->res;
6307 task_setup_data.callback_data = data;
6308 if (recovery_type > NFS_LOCK_NEW) {
6309 if (recovery_type == NFS_LOCK_RECLAIM)
6310 data->arg.reclaim = NFS_LOCK_RECLAIM;
6311 nfs4_set_sequence_privileged(&data->arg.seq_args);
6313 data->arg.new_lock = 1;
6314 task = rpc_run_task(&task_setup_data);
6316 return PTR_ERR(task);
6317 ret = nfs4_wait_for_completion_rpc_task(task);
6319 ret = data->rpc_status;
6321 nfs4_handle_setlk_error(data->server, data->lsp,
6322 data->arg.new_lock_owner, ret);
6324 data->cancelled = 1;
6326 dprintk("%s: done, ret = %d!\n", __func__, ret);
6327 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
6331 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6333 struct nfs_server *server = NFS_SERVER(state->inode);
6334 struct nfs4_exception exception = {
6335 .inode = state->inode,
6340 /* Cache the lock if possible... */
6341 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6343 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
6344 if (err != -NFS4ERR_DELAY)
6346 nfs4_handle_exception(server, err, &exception);
6347 } while (exception.retry);
6351 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6353 struct nfs_server *server = NFS_SERVER(state->inode);
6354 struct nfs4_exception exception = {
6355 .inode = state->inode,
6359 err = nfs4_set_lock_state(state, request);
6362 if (!recover_lost_locks) {
6363 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6367 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6369 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
6373 case -NFS4ERR_GRACE:
6374 case -NFS4ERR_DELAY:
6375 nfs4_handle_exception(server, err, &exception);
6378 } while (exception.retry);
6383 #if defined(CONFIG_NFS_V4_1)
6384 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6386 struct nfs4_lock_state *lsp;
6389 status = nfs4_set_lock_state(state, request);
6392 lsp = request->fl_u.nfs4_fl.owner;
6393 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6394 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6396 status = nfs4_lock_expired(state, request);
6401 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6403 struct nfs_inode *nfsi = NFS_I(state->inode);
6404 struct nfs4_state_owner *sp = state->owner;
6405 unsigned char fl_flags = request->fl_flags;
6408 request->fl_flags |= FL_ACCESS;
6409 status = locks_lock_inode_wait(state->inode, request);
6412 mutex_lock(&sp->so_delegreturn_mutex);
6413 down_read(&nfsi->rwsem);
6414 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6415 /* Yes: cache locks! */
6416 /* ...but avoid races with delegation recall... */
6417 request->fl_flags = fl_flags & ~FL_SLEEP;
6418 status = locks_lock_inode_wait(state->inode, request);
6419 up_read(&nfsi->rwsem);
6420 mutex_unlock(&sp->so_delegreturn_mutex);
6423 up_read(&nfsi->rwsem);
6424 mutex_unlock(&sp->so_delegreturn_mutex);
6425 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6427 request->fl_flags = fl_flags;
6431 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6433 struct nfs4_exception exception = {
6435 .inode = state->inode,
6440 err = _nfs4_proc_setlk(state, cmd, request);
6441 if (err == -NFS4ERR_DENIED)
6443 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6445 } while (exception.retry);
6449 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6450 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6453 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6454 struct file_lock *request)
6456 int status = -ERESTARTSYS;
6457 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6459 while(!signalled()) {
6460 status = nfs4_proc_setlk(state, cmd, request);
6461 if ((status != -EAGAIN) || IS_SETLK(cmd))
6463 freezable_schedule_timeout_interruptible(timeout);
6465 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6466 status = -ERESTARTSYS;
6471 #ifdef CONFIG_NFS_V4_1
6472 struct nfs4_lock_waiter {
6473 struct task_struct *task;
6474 struct inode *inode;
6475 struct nfs_lowner *owner;
6480 nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6483 struct cb_notify_lock_args *cbnl = key;
6484 struct nfs4_lock_waiter *waiter = wait->private;
6485 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6486 *wowner = waiter->owner;
6488 /* Only wake if the callback was for the same owner */
6489 if (lowner->clientid != wowner->clientid ||
6490 lowner->id != wowner->id ||
6491 lowner->s_dev != wowner->s_dev)
6494 /* Make sure it's for the right inode */
6495 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6498 waiter->notified = true;
6500 /* override "private" so we can use default_wake_function */
6501 wait->private = waiter->task;
6502 ret = autoremove_wake_function(wait, mode, flags, key);
6503 wait->private = waiter;
6508 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6510 int status = -ERESTARTSYS;
6511 unsigned long flags;
6512 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6513 struct nfs_server *server = NFS_SERVER(state->inode);
6514 struct nfs_client *clp = server->nfs_client;
6515 wait_queue_head_t *q = &clp->cl_lock_waitq;
6516 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6517 .id = lsp->ls_seqid.owner_id,
6518 .s_dev = server->s_dev };
6519 struct nfs4_lock_waiter waiter = { .task = current,
6520 .inode = state->inode,
6522 .notified = false };
6525 /* Don't bother with waitqueue if we don't expect a callback */
6526 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6527 return nfs4_retry_setlk_simple(state, cmd, request);
6530 wait.private = &waiter;
6531 wait.func = nfs4_wake_lock_waiter;
6532 add_wait_queue(q, &wait);
6534 while(!signalled()) {
6535 status = nfs4_proc_setlk(state, cmd, request);
6536 if ((status != -EAGAIN) || IS_SETLK(cmd))
6539 status = -ERESTARTSYS;
6540 spin_lock_irqsave(&q->lock, flags);
6541 if (waiter.notified) {
6542 spin_unlock_irqrestore(&q->lock, flags);
6545 set_current_state(TASK_INTERRUPTIBLE);
6546 spin_unlock_irqrestore(&q->lock, flags);
6548 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6551 finish_wait(q, &wait);
6554 #else /* !CONFIG_NFS_V4_1 */
6556 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6558 return nfs4_retry_setlk_simple(state, cmd, request);
6563 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6565 struct nfs_open_context *ctx;
6566 struct nfs4_state *state;
6569 /* verify open state */
6570 ctx = nfs_file_open_context(filp);
6573 if (request->fl_start < 0 || request->fl_end < 0)
6576 if (IS_GETLK(cmd)) {
6578 return nfs4_proc_getlk(state, F_GETLK, request);
6582 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6585 if (request->fl_type == F_UNLCK) {
6587 return nfs4_proc_unlck(state, cmd, request);
6594 if ((request->fl_flags & FL_POSIX) &&
6595 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6599 * Don't rely on the VFS having checked the file open mode,
6600 * since it won't do this for flock() locks.
6602 switch (request->fl_type) {
6604 if (!(filp->f_mode & FMODE_READ))
6608 if (!(filp->f_mode & FMODE_WRITE))
6612 status = nfs4_set_lock_state(state, request);
6616 return nfs4_retry_setlk(state, cmd, request);
6619 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6621 struct nfs_server *server = NFS_SERVER(state->inode);
6624 err = nfs4_set_lock_state(state, fl);
6627 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6628 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6631 struct nfs_release_lockowner_data {
6632 struct nfs4_lock_state *lsp;
6633 struct nfs_server *server;
6634 struct nfs_release_lockowner_args args;
6635 struct nfs_release_lockowner_res res;
6636 unsigned long timestamp;
6639 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6641 struct nfs_release_lockowner_data *data = calldata;
6642 struct nfs_server *server = data->server;
6643 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6644 &data->args.seq_args, &data->res.seq_res, task);
6645 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6646 data->timestamp = jiffies;
6649 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6651 struct nfs_release_lockowner_data *data = calldata;
6652 struct nfs_server *server = data->server;
6654 nfs40_sequence_done(task, &data->res.seq_res);
6656 switch (task->tk_status) {
6658 renew_lease(server, data->timestamp);
6660 case -NFS4ERR_STALE_CLIENTID:
6661 case -NFS4ERR_EXPIRED:
6662 nfs4_schedule_lease_recovery(server->nfs_client);
6664 case -NFS4ERR_LEASE_MOVED:
6665 case -NFS4ERR_DELAY:
6666 if (nfs4_async_handle_error(task, server,
6667 NULL, NULL) == -EAGAIN)
6668 rpc_restart_call_prepare(task);
6672 static void nfs4_release_lockowner_release(void *calldata)
6674 struct nfs_release_lockowner_data *data = calldata;
6675 nfs4_free_lock_state(data->server, data->lsp);
6679 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6680 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6681 .rpc_call_done = nfs4_release_lockowner_done,
6682 .rpc_release = nfs4_release_lockowner_release,
6686 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6688 struct nfs_release_lockowner_data *data;
6689 struct rpc_message msg = {
6690 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6693 if (server->nfs_client->cl_mvops->minor_version != 0)
6696 data = kmalloc(sizeof(*data), GFP_NOFS);
6700 data->server = server;
6701 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6702 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6703 data->args.lock_owner.s_dev = server->s_dev;
6705 msg.rpc_argp = &data->args;
6706 msg.rpc_resp = &data->res;
6707 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6708 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6711 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6713 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6714 struct dentry *unused, struct inode *inode,
6715 const char *key, const void *buf,
6716 size_t buflen, int flags)
6718 return nfs4_proc_set_acl(inode, buf, buflen);
6721 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6722 struct dentry *unused, struct inode *inode,
6723 const char *key, void *buf, size_t buflen)
6725 return nfs4_proc_get_acl(inode, buf, buflen);
6728 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6730 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6733 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6735 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6736 struct dentry *unused, struct inode *inode,
6737 const char *key, const void *buf,
6738 size_t buflen, int flags)
6740 if (security_ismaclabel(key))
6741 return nfs4_set_security_label(inode, buf, buflen);
6746 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6747 struct dentry *unused, struct inode *inode,
6748 const char *key, void *buf, size_t buflen)
6750 if (security_ismaclabel(key))
6751 return nfs4_get_security_label(inode, buf, buflen);
6756 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6760 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6761 len = security_inode_listsecurity(inode, list, list_len);
6762 if (list_len && len > list_len)
6768 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6769 .prefix = XATTR_SECURITY_PREFIX,
6770 .get = nfs4_xattr_get_nfs4_label,
6771 .set = nfs4_xattr_set_nfs4_label,
6777 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6785 * nfs_fhget will use either the mounted_on_fileid or the fileid
6787 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6789 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6790 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6791 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6792 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6795 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6796 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6797 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6801 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6802 const struct qstr *name,
6803 struct nfs4_fs_locations *fs_locations,
6806 struct nfs_server *server = NFS_SERVER(dir);
6808 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6810 struct nfs4_fs_locations_arg args = {
6811 .dir_fh = NFS_FH(dir),
6816 struct nfs4_fs_locations_res res = {
6817 .fs_locations = fs_locations,
6819 struct rpc_message msg = {
6820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6826 dprintk("%s: start\n", __func__);
6828 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6829 * is not supported */
6830 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6831 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6833 bitmask[0] |= FATTR4_WORD0_FILEID;
6835 nfs_fattr_init(&fs_locations->fattr);
6836 fs_locations->server = server;
6837 fs_locations->nlocations = 0;
6838 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6839 dprintk("%s: returned status = %d\n", __func__, status);
6843 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6844 const struct qstr *name,
6845 struct nfs4_fs_locations *fs_locations,
6848 struct nfs4_exception exception = { };
6851 err = _nfs4_proc_fs_locations(client, dir, name,
6852 fs_locations, page);
6853 trace_nfs4_get_fs_locations(dir, name, err);
6854 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6856 } while (exception.retry);
6861 * This operation also signals the server that this client is
6862 * performing migration recovery. The server can stop returning
6863 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6864 * appended to this compound to identify the client ID which is
6865 * performing recovery.
6867 static int _nfs40_proc_get_locations(struct inode *inode,
6868 struct nfs4_fs_locations *locations,
6869 struct page *page, struct rpc_cred *cred)
6871 struct nfs_server *server = NFS_SERVER(inode);
6872 struct rpc_clnt *clnt = server->client;
6874 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6876 struct nfs4_fs_locations_arg args = {
6877 .clientid = server->nfs_client->cl_clientid,
6878 .fh = NFS_FH(inode),
6881 .migration = 1, /* skip LOOKUP */
6882 .renew = 1, /* append RENEW */
6884 struct nfs4_fs_locations_res res = {
6885 .fs_locations = locations,
6889 struct rpc_message msg = {
6890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6895 unsigned long now = jiffies;
6898 nfs_fattr_init(&locations->fattr);
6899 locations->server = server;
6900 locations->nlocations = 0;
6902 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6903 nfs4_set_sequence_privileged(&args.seq_args);
6904 status = nfs4_call_sync_sequence(clnt, server, &msg,
6905 &args.seq_args, &res.seq_res);
6909 renew_lease(server, now);
6913 #ifdef CONFIG_NFS_V4_1
6916 * This operation also signals the server that this client is
6917 * performing migration recovery. The server can stop asserting
6918 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6919 * performing this operation is identified in the SEQUENCE
6920 * operation in this compound.
6922 * When the client supports GETATTR(fs_locations_info), it can
6923 * be plumbed in here.
6925 static int _nfs41_proc_get_locations(struct inode *inode,
6926 struct nfs4_fs_locations *locations,
6927 struct page *page, struct rpc_cred *cred)
6929 struct nfs_server *server = NFS_SERVER(inode);
6930 struct rpc_clnt *clnt = server->client;
6932 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6934 struct nfs4_fs_locations_arg args = {
6935 .fh = NFS_FH(inode),
6938 .migration = 1, /* skip LOOKUP */
6940 struct nfs4_fs_locations_res res = {
6941 .fs_locations = locations,
6944 struct rpc_message msg = {
6945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6952 nfs_fattr_init(&locations->fattr);
6953 locations->server = server;
6954 locations->nlocations = 0;
6956 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6957 nfs4_set_sequence_privileged(&args.seq_args);
6958 status = nfs4_call_sync_sequence(clnt, server, &msg,
6959 &args.seq_args, &res.seq_res);
6960 if (status == NFS4_OK &&
6961 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6962 status = -NFS4ERR_LEASE_MOVED;
6966 #endif /* CONFIG_NFS_V4_1 */
6969 * nfs4_proc_get_locations - discover locations for a migrated FSID
6970 * @inode: inode on FSID that is migrating
6971 * @locations: result of query
6973 * @cred: credential to use for this operation
6975 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6976 * operation failed, or a negative errno if a local error occurred.
6978 * On success, "locations" is filled in, but if the server has
6979 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6982 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6983 * from this client that require migration recovery.
6985 int nfs4_proc_get_locations(struct inode *inode,
6986 struct nfs4_fs_locations *locations,
6987 struct page *page, struct rpc_cred *cred)
6989 struct nfs_server *server = NFS_SERVER(inode);
6990 struct nfs_client *clp = server->nfs_client;
6991 const struct nfs4_mig_recovery_ops *ops =
6992 clp->cl_mvops->mig_recovery_ops;
6993 struct nfs4_exception exception = { };
6996 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6997 (unsigned long long)server->fsid.major,
6998 (unsigned long long)server->fsid.minor,
7000 nfs_display_fhandle(NFS_FH(inode), __func__);
7003 status = ops->get_locations(inode, locations, page, cred);
7004 if (status != -NFS4ERR_DELAY)
7006 nfs4_handle_exception(server, status, &exception);
7007 } while (exception.retry);
7012 * This operation also signals the server that this client is
7013 * performing "lease moved" recovery. The server can stop
7014 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
7015 * is appended to this compound to identify the client ID which is
7016 * performing recovery.
7018 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7020 struct nfs_server *server = NFS_SERVER(inode);
7021 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
7022 struct rpc_clnt *clnt = server->client;
7023 struct nfs4_fsid_present_arg args = {
7024 .fh = NFS_FH(inode),
7025 .clientid = clp->cl_clientid,
7026 .renew = 1, /* append RENEW */
7028 struct nfs4_fsid_present_res res = {
7031 struct rpc_message msg = {
7032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7037 unsigned long now = jiffies;
7040 res.fh = nfs_alloc_fhandle();
7044 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7045 nfs4_set_sequence_privileged(&args.seq_args);
7046 status = nfs4_call_sync_sequence(clnt, server, &msg,
7047 &args.seq_args, &res.seq_res);
7048 nfs_free_fhandle(res.fh);
7052 do_renew_lease(clp, now);
7056 #ifdef CONFIG_NFS_V4_1
7059 * This operation also signals the server that this client is
7060 * performing "lease moved" recovery. The server can stop asserting
7061 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
7062 * this operation is identified in the SEQUENCE operation in this
7065 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7067 struct nfs_server *server = NFS_SERVER(inode);
7068 struct rpc_clnt *clnt = server->client;
7069 struct nfs4_fsid_present_arg args = {
7070 .fh = NFS_FH(inode),
7072 struct nfs4_fsid_present_res res = {
7074 struct rpc_message msg = {
7075 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7082 res.fh = nfs_alloc_fhandle();
7086 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7087 nfs4_set_sequence_privileged(&args.seq_args);
7088 status = nfs4_call_sync_sequence(clnt, server, &msg,
7089 &args.seq_args, &res.seq_res);
7090 nfs_free_fhandle(res.fh);
7091 if (status == NFS4_OK &&
7092 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7093 status = -NFS4ERR_LEASE_MOVED;
7097 #endif /* CONFIG_NFS_V4_1 */
7100 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7101 * @inode: inode on FSID to check
7102 * @cred: credential to use for this operation
7104 * Server indicates whether the FSID is present, moved, or not
7105 * recognized. This operation is necessary to clear a LEASE_MOVED
7106 * condition for this client ID.
7108 * Returns NFS4_OK if the FSID is present on this server,
7109 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7110 * NFS4ERR code if some error occurred on the server, or a
7111 * negative errno if a local failure occurred.
7113 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7115 struct nfs_server *server = NFS_SERVER(inode);
7116 struct nfs_client *clp = server->nfs_client;
7117 const struct nfs4_mig_recovery_ops *ops =
7118 clp->cl_mvops->mig_recovery_ops;
7119 struct nfs4_exception exception = { };
7122 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7123 (unsigned long long)server->fsid.major,
7124 (unsigned long long)server->fsid.minor,
7126 nfs_display_fhandle(NFS_FH(inode), __func__);
7129 status = ops->fsid_present(inode, cred);
7130 if (status != -NFS4ERR_DELAY)
7132 nfs4_handle_exception(server, status, &exception);
7133 } while (exception.retry);
7138 * If 'use_integrity' is true and the state managment nfs_client
7139 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7140 * and the machine credential as per RFC3530bis and RFC5661 Security
7141 * Considerations sections. Otherwise, just use the user cred with the
7142 * filesystem's rpc_client.
7144 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7147 struct nfs4_secinfo_arg args = {
7148 .dir_fh = NFS_FH(dir),
7151 struct nfs4_secinfo_res res = {
7154 struct rpc_message msg = {
7155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7159 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7160 struct rpc_cred *cred = NULL;
7162 if (use_integrity) {
7163 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7164 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7165 msg.rpc_cred = cred;
7168 dprintk("NFS call secinfo %s\n", name->name);
7170 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7171 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7173 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7175 dprintk("NFS reply secinfo: %d\n", status);
7183 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7184 struct nfs4_secinfo_flavors *flavors)
7186 struct nfs4_exception exception = { };
7189 err = -NFS4ERR_WRONGSEC;
7191 /* try to use integrity protection with machine cred */
7192 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7193 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7196 * if unable to use integrity protection, or SECINFO with
7197 * integrity protection returns NFS4ERR_WRONGSEC (which is
7198 * disallowed by spec, but exists in deployed servers) use
7199 * the current filesystem's rpc_client and the user cred.
7201 if (err == -NFS4ERR_WRONGSEC)
7202 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7204 trace_nfs4_secinfo(dir, name, err);
7205 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7207 } while (exception.retry);
7211 #ifdef CONFIG_NFS_V4_1
7213 * Check the exchange flags returned by the server for invalid flags, having
7214 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7217 static int nfs4_check_cl_exchange_flags(u32 flags)
7219 if (flags & ~EXCHGID4_FLAG_MASK_R)
7221 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7222 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7224 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7228 return -NFS4ERR_INVAL;
7232 nfs41_same_server_scope(struct nfs41_server_scope *a,
7233 struct nfs41_server_scope *b)
7235 if (a->server_scope_sz == b->server_scope_sz &&
7236 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
7243 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7247 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7248 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7252 * nfs4_proc_bind_one_conn_to_session()
7254 * The 4.1 client currently uses the same TCP connection for the
7255 * fore and backchannel.
7258 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7259 struct rpc_xprt *xprt,
7260 struct nfs_client *clp,
7261 struct rpc_cred *cred)
7264 struct nfs41_bind_conn_to_session_args args = {
7266 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7268 struct nfs41_bind_conn_to_session_res res;
7269 struct rpc_message msg = {
7271 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
7276 struct rpc_task_setup task_setup_data = {
7279 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
7280 .rpc_message = &msg,
7281 .flags = RPC_TASK_TIMEOUT,
7283 struct rpc_task *task;
7285 dprintk("--> %s\n", __func__);
7287 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7288 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7289 args.dir = NFS4_CDFC4_FORE;
7291 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7292 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7293 args.dir = NFS4_CDFC4_FORE;
7295 task = rpc_run_task(&task_setup_data);
7296 if (!IS_ERR(task)) {
7297 status = task->tk_status;
7300 status = PTR_ERR(task);
7301 trace_nfs4_bind_conn_to_session(clp, status);
7303 if (memcmp(res.sessionid.data,
7304 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7305 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7309 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7310 dprintk("NFS: %s: Unexpected direction from server\n",
7315 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7316 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7323 dprintk("<-- %s status= %d\n", __func__, status);
7327 struct rpc_bind_conn_calldata {
7328 struct nfs_client *clp;
7329 struct rpc_cred *cred;
7333 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7334 struct rpc_xprt *xprt,
7337 struct rpc_bind_conn_calldata *p = calldata;
7339 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7342 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7344 struct rpc_bind_conn_calldata data = {
7348 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7349 nfs4_proc_bind_conn_to_session_callback, &data);
7353 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7354 * and operations we'd like to see to enable certain features in the allow map
7356 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7357 .how = SP4_MACH_CRED,
7358 .enforce.u.words = {
7359 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7360 1 << (OP_EXCHANGE_ID - 32) |
7361 1 << (OP_CREATE_SESSION - 32) |
7362 1 << (OP_DESTROY_SESSION - 32) |
7363 1 << (OP_DESTROY_CLIENTID - 32)
7366 [0] = 1 << (OP_CLOSE) |
7367 1 << (OP_OPEN_DOWNGRADE) |
7369 1 << (OP_DELEGRETURN) |
7371 [1] = 1 << (OP_SECINFO - 32) |
7372 1 << (OP_SECINFO_NO_NAME - 32) |
7373 1 << (OP_LAYOUTRETURN - 32) |
7374 1 << (OP_TEST_STATEID - 32) |
7375 1 << (OP_FREE_STATEID - 32) |
7376 1 << (OP_WRITE - 32)
7381 * Select the state protection mode for client `clp' given the server results
7382 * from exchange_id in `sp'.
7384 * Returns 0 on success, negative errno otherwise.
7386 static int nfs4_sp4_select_mode(struct nfs_client *clp,
7387 struct nfs41_state_protection *sp)
7389 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7390 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7391 1 << (OP_EXCHANGE_ID - 32) |
7392 1 << (OP_CREATE_SESSION - 32) |
7393 1 << (OP_DESTROY_SESSION - 32) |
7394 1 << (OP_DESTROY_CLIENTID - 32)
7398 if (sp->how == SP4_MACH_CRED) {
7399 /* Print state protect result */
7400 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7401 for (i = 0; i <= LAST_NFS4_OP; i++) {
7402 if (test_bit(i, sp->enforce.u.longs))
7403 dfprintk(MOUNT, " enforce op %d\n", i);
7404 if (test_bit(i, sp->allow.u.longs))
7405 dfprintk(MOUNT, " allow op %d\n", i);
7408 /* make sure nothing is on enforce list that isn't supported */
7409 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7410 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7411 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7417 * Minimal mode - state operations are allowed to use machine
7418 * credential. Note this already happens by default, so the
7419 * client doesn't have to do anything more than the negotiation.
7421 * NOTE: we don't care if EXCHANGE_ID is in the list -
7422 * we're already using the machine cred for exchange_id
7423 * and will never use a different cred.
7425 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7426 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7427 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7428 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7429 dfprintk(MOUNT, "sp4_mach_cred:\n");
7430 dfprintk(MOUNT, " minimal mode enabled\n");
7431 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7433 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7437 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
7438 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7439 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
7440 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7441 dfprintk(MOUNT, " cleanup mode enabled\n");
7442 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7445 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7446 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7447 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7448 &clp->cl_sp4_flags);
7451 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7452 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7453 dfprintk(MOUNT, " secinfo mode enabled\n");
7454 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7457 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7458 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7459 dfprintk(MOUNT, " stateid mode enabled\n");
7460 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7463 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7464 dfprintk(MOUNT, " write mode enabled\n");
7465 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7468 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7469 dfprintk(MOUNT, " commit mode enabled\n");
7470 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7477 struct nfs41_exchange_id_data {
7478 struct nfs41_exchange_id_res res;
7479 struct nfs41_exchange_id_args args;
7480 struct rpc_xprt *xprt;
7484 static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7486 struct nfs41_exchange_id_data *cdata =
7487 (struct nfs41_exchange_id_data *)data;
7488 struct nfs_client *clp = cdata->args.client;
7489 int status = task->tk_status;
7491 trace_nfs4_exchange_id(clp, status);
7494 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
7496 if (cdata->xprt && status == 0) {
7497 status = nfs4_detect_session_trunking(clp, &cdata->res,
7503 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7506 clp->cl_clientid = cdata->res.clientid;
7507 clp->cl_exchange_flags = cdata->res.flags;
7508 /* Client ID is not confirmed */
7509 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7510 clear_bit(NFS4_SESSION_ESTABLISHED,
7511 &clp->cl_session->session_state);
7512 clp->cl_seqid = cdata->res.seqid;
7515 kfree(clp->cl_serverowner);
7516 clp->cl_serverowner = cdata->res.server_owner;
7517 cdata->res.server_owner = NULL;
7519 /* use the most recent implementation id */
7520 kfree(clp->cl_implid);
7521 clp->cl_implid = cdata->res.impl_id;
7522 cdata->res.impl_id = NULL;
7524 if (clp->cl_serverscope != NULL &&
7525 !nfs41_same_server_scope(clp->cl_serverscope,
7526 cdata->res.server_scope)) {
7527 dprintk("%s: server_scope mismatch detected\n",
7529 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7530 kfree(clp->cl_serverscope);
7531 clp->cl_serverscope = NULL;
7534 if (clp->cl_serverscope == NULL) {
7535 clp->cl_serverscope = cdata->res.server_scope;
7536 cdata->res.server_scope = NULL;
7538 /* Save the EXCHANGE_ID verifier session trunk tests */
7539 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7540 sizeof(clp->cl_confirm.data));
7543 cdata->rpc_status = status;
7547 static void nfs4_exchange_id_release(void *data)
7549 struct nfs41_exchange_id_data *cdata =
7550 (struct nfs41_exchange_id_data *)data;
7552 nfs_put_client(cdata->args.client);
7554 xprt_put(cdata->xprt);
7555 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7557 kfree(cdata->res.impl_id);
7558 kfree(cdata->res.server_scope);
7559 kfree(cdata->res.server_owner);
7563 static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7564 .rpc_call_done = nfs4_exchange_id_done,
7565 .rpc_release = nfs4_exchange_id_release,
7569 * _nfs4_proc_exchange_id()
7571 * Wrapper for EXCHANGE_ID operation.
7573 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7574 u32 sp4_how, struct rpc_xprt *xprt)
7576 nfs4_verifier verifier;
7577 struct rpc_message msg = {
7578 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7581 struct rpc_task_setup task_setup_data = {
7582 .rpc_client = clp->cl_rpcclient,
7583 .callback_ops = &nfs4_exchange_id_call_ops,
7584 .rpc_message = &msg,
7585 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7587 struct nfs41_exchange_id_data *calldata;
7588 struct rpc_task *task;
7591 if (!atomic_inc_not_zero(&clp->cl_count))
7595 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7600 nfs4_init_boot_verifier(clp, &verifier);
7602 status = nfs4_init_uniform_client_string(clp);
7606 dprintk("NFS call exchange_id auth=%s, '%s'\n",
7607 clp->cl_rpcclient->cl_auth->au_ops->au_name,
7610 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7613 if (unlikely(calldata->res.server_owner == NULL))
7616 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
7618 if (unlikely(calldata->res.server_scope == NULL))
7619 goto out_server_owner;
7621 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7622 if (unlikely(calldata->res.impl_id == NULL))
7623 goto out_server_scope;
7627 calldata->args.state_protect.how = SP4_NONE;
7631 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
7641 calldata->xprt = xprt;
7642 task_setup_data.rpc_xprt = xprt;
7643 task_setup_data.flags =
7644 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7645 calldata->args.verifier = &clp->cl_confirm;
7647 calldata->args.verifier = &verifier;
7649 calldata->args.client = clp;
7650 #ifdef CONFIG_NFS_V4_1_MIGRATION
7651 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7652 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7653 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7655 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7656 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7658 msg.rpc_argp = &calldata->args;
7659 msg.rpc_resp = &calldata->res;
7660 task_setup_data.callback_data = calldata;
7662 task = rpc_run_task(&task_setup_data);
7664 status = PTR_ERR(task);
7669 status = rpc_wait_for_completion_task(task);
7671 status = calldata->rpc_status;
7672 } else /* session trunking test */
7673 status = calldata->rpc_status;
7677 if (clp->cl_implid != NULL)
7678 dprintk("NFS reply exchange_id: Server Implementation ID: "
7679 "domain: %s, name: %s, date: %llu,%u\n",
7680 clp->cl_implid->domain, clp->cl_implid->name,
7681 clp->cl_implid->date.seconds,
7682 clp->cl_implid->date.nseconds);
7683 dprintk("NFS reply exchange_id: %d\n", status);
7687 kfree(calldata->res.impl_id);
7689 kfree(calldata->res.server_scope);
7691 kfree(calldata->res.server_owner);
7698 * nfs4_proc_exchange_id()
7700 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7702 * Since the clientid has expired, all compounds using sessions
7703 * associated with the stale clientid will be returning
7704 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7705 * be in some phase of session reset.
7707 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7709 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7711 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7714 /* try SP4_MACH_CRED if krb5i/p */
7715 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7716 authflavor == RPC_AUTH_GSS_KRB5P) {
7717 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
7723 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
7727 * nfs4_test_session_trunk
7729 * This is an add_xprt_test() test function called from
7730 * rpc_clnt_setup_test_and_add_xprt.
7732 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7733 * and is dereferrenced in nfs4_exchange_id_release
7735 * Upon success, add the new transport to the rpc_clnt
7737 * @clnt: struct rpc_clnt to get new transport
7738 * @xprt: the rpc_xprt to test
7739 * @data: call data for _nfs4_proc_exchange_id.
7741 int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7744 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7747 dprintk("--> %s try %s\n", __func__,
7748 xprt->address_strings[RPC_DISPLAY_ADDR]);
7750 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7752 /* Test connection for session trunking. Async exchange_id call */
7753 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
7755 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
7757 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7758 struct rpc_cred *cred)
7760 struct rpc_message msg = {
7761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7767 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7768 trace_nfs4_destroy_clientid(clp, status);
7770 dprintk("NFS: Got error %d from the server %s on "
7771 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7775 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7776 struct rpc_cred *cred)
7781 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7782 ret = _nfs4_proc_destroy_clientid(clp, cred);
7784 case -NFS4ERR_DELAY:
7785 case -NFS4ERR_CLIENTID_BUSY:
7795 int nfs4_destroy_clientid(struct nfs_client *clp)
7797 struct rpc_cred *cred;
7800 if (clp->cl_mvops->minor_version < 1)
7802 if (clp->cl_exchange_flags == 0)
7804 if (clp->cl_preserve_clid)
7806 cred = nfs4_get_clid_cred(clp);
7807 ret = nfs4_proc_destroy_clientid(clp, cred);
7812 case -NFS4ERR_STALE_CLIENTID:
7813 clp->cl_exchange_flags = 0;
7819 struct nfs4_get_lease_time_data {
7820 struct nfs4_get_lease_time_args *args;
7821 struct nfs4_get_lease_time_res *res;
7822 struct nfs_client *clp;
7825 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7828 struct nfs4_get_lease_time_data *data =
7829 (struct nfs4_get_lease_time_data *)calldata;
7831 dprintk("--> %s\n", __func__);
7832 /* just setup sequence, do not trigger session recovery
7833 since we're invoked within one */
7834 nfs41_setup_sequence(data->clp->cl_session,
7835 &data->args->la_seq_args,
7836 &data->res->lr_seq_res,
7838 dprintk("<-- %s\n", __func__);
7842 * Called from nfs4_state_manager thread for session setup, so don't recover
7843 * from sequence operation or clientid errors.
7845 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7847 struct nfs4_get_lease_time_data *data =
7848 (struct nfs4_get_lease_time_data *)calldata;
7850 dprintk("--> %s\n", __func__);
7851 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7853 switch (task->tk_status) {
7854 case -NFS4ERR_DELAY:
7855 case -NFS4ERR_GRACE:
7856 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7857 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7858 task->tk_status = 0;
7860 case -NFS4ERR_RETRY_UNCACHED_REP:
7861 rpc_restart_call_prepare(task);
7864 dprintk("<-- %s\n", __func__);
7867 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7868 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7869 .rpc_call_done = nfs4_get_lease_time_done,
7872 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7874 struct rpc_task *task;
7875 struct nfs4_get_lease_time_args args;
7876 struct nfs4_get_lease_time_res res = {
7877 .lr_fsinfo = fsinfo,
7879 struct nfs4_get_lease_time_data data = {
7884 struct rpc_message msg = {
7885 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7889 struct rpc_task_setup task_setup = {
7890 .rpc_client = clp->cl_rpcclient,
7891 .rpc_message = &msg,
7892 .callback_ops = &nfs4_get_lease_time_ops,
7893 .callback_data = &data,
7894 .flags = RPC_TASK_TIMEOUT,
7898 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7899 nfs4_set_sequence_privileged(&args.la_seq_args);
7900 dprintk("--> %s\n", __func__);
7901 task = rpc_run_task(&task_setup);
7904 status = PTR_ERR(task);
7906 status = task->tk_status;
7909 dprintk("<-- %s return %d\n", __func__, status);
7915 * Initialize the values to be used by the client in CREATE_SESSION
7916 * If nfs4_init_session set the fore channel request and response sizes,
7919 * Set the back channel max_resp_sz_cached to zero to force the client to
7920 * always set csa_cachethis to FALSE because the current implementation
7921 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7923 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7924 struct rpc_clnt *clnt)
7926 unsigned int max_rqst_sz, max_resp_sz;
7927 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
7929 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7930 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7932 /* Fore channel attributes */
7933 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7934 args->fc_attrs.max_resp_sz = max_resp_sz;
7935 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7936 args->fc_attrs.max_reqs = max_session_slots;
7938 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7939 "max_ops=%u max_reqs=%u\n",
7941 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7942 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7944 /* Back channel attributes */
7945 args->bc_attrs.max_rqst_sz = max_bc_payload;
7946 args->bc_attrs.max_resp_sz = max_bc_payload;
7947 args->bc_attrs.max_resp_sz_cached = 0;
7948 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7949 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
7951 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7952 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7954 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7955 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7956 args->bc_attrs.max_reqs);
7959 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7960 struct nfs41_create_session_res *res)
7962 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7963 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
7965 if (rcvd->max_resp_sz > sent->max_resp_sz)
7968 * Our requested max_ops is the minimum we need; we're not
7969 * prepared to break up compounds into smaller pieces than that.
7970 * So, no point even trying to continue if the server won't
7973 if (rcvd->max_ops < sent->max_ops)
7975 if (rcvd->max_reqs == 0)
7977 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7978 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7982 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7983 struct nfs41_create_session_res *res)
7985 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7986 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
7988 if (!(res->flags & SESSION4_BACK_CHAN))
7990 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7992 if (rcvd->max_resp_sz < sent->max_resp_sz)
7994 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7996 if (rcvd->max_ops > sent->max_ops)
7998 if (rcvd->max_reqs > sent->max_reqs)
8004 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
8005 struct nfs41_create_session_res *res)
8009 ret = nfs4_verify_fore_channel_attrs(args, res);
8012 return nfs4_verify_back_channel_attrs(args, res);
8015 static void nfs4_update_session(struct nfs4_session *session,
8016 struct nfs41_create_session_res *res)
8018 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
8019 /* Mark client id and session as being confirmed */
8020 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
8021 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
8022 session->flags = res->flags;
8023 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
8024 if (res->flags & SESSION4_BACK_CHAN)
8025 memcpy(&session->bc_attrs, &res->bc_attrs,
8026 sizeof(session->bc_attrs));
8029 static int _nfs4_proc_create_session(struct nfs_client *clp,
8030 struct rpc_cred *cred)
8032 struct nfs4_session *session = clp->cl_session;
8033 struct nfs41_create_session_args args = {
8035 .clientid = clp->cl_clientid,
8036 .seqid = clp->cl_seqid,
8037 .cb_program = NFS4_CALLBACK,
8039 struct nfs41_create_session_res res;
8041 struct rpc_message msg = {
8042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
8049 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
8050 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
8052 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
8053 trace_nfs4_create_session(clp, status);
8056 case -NFS4ERR_STALE_CLIENTID:
8057 case -NFS4ERR_DELAY:
8066 /* Verify the session's negotiated channel_attrs values */
8067 status = nfs4_verify_channel_attrs(&args, &res);
8068 /* Increment the clientid slot sequence id */
8071 nfs4_update_session(session, &res);
8078 * Issues a CREATE_SESSION operation to the server.
8079 * It is the responsibility of the caller to verify the session is
8080 * expired before calling this routine.
8082 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
8086 struct nfs4_session *session = clp->cl_session;
8088 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
8090 status = _nfs4_proc_create_session(clp, cred);
8094 /* Init or reset the session slot tables */
8095 status = nfs4_setup_session_slot_tables(session);
8096 dprintk("slot table setup returned %d\n", status);
8100 ptr = (unsigned *)&session->sess_id.data[0];
8101 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8102 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
8104 dprintk("<-- %s\n", __func__);
8109 * Issue the over-the-wire RPC DESTROY_SESSION.
8110 * The caller must serialize access to this routine.
8112 int nfs4_proc_destroy_session(struct nfs4_session *session,
8113 struct rpc_cred *cred)
8115 struct rpc_message msg = {
8116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8117 .rpc_argp = session,
8122 dprintk("--> nfs4_proc_destroy_session\n");
8124 /* session is still being setup */
8125 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8128 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
8129 trace_nfs4_destroy_session(session->clp, status);
8132 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
8133 "Session has been destroyed regardless...\n", status);
8135 dprintk("<-- nfs4_proc_destroy_session\n");
8140 * Renew the cl_session lease.
8142 struct nfs4_sequence_data {
8143 struct nfs_client *clp;
8144 struct nfs4_sequence_args args;
8145 struct nfs4_sequence_res res;
8148 static void nfs41_sequence_release(void *data)
8150 struct nfs4_sequence_data *calldata = data;
8151 struct nfs_client *clp = calldata->clp;
8153 if (atomic_read(&clp->cl_count) > 1)
8154 nfs4_schedule_state_renewal(clp);
8155 nfs_put_client(clp);
8159 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8161 switch(task->tk_status) {
8162 case -NFS4ERR_DELAY:
8163 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8166 nfs4_schedule_lease_recovery(clp);
8171 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
8173 struct nfs4_sequence_data *calldata = data;
8174 struct nfs_client *clp = calldata->clp;
8176 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8179 trace_nfs4_sequence(clp, task->tk_status);
8180 if (task->tk_status < 0) {
8181 dprintk("%s ERROR %d\n", __func__, task->tk_status);
8182 if (atomic_read(&clp->cl_count) == 1)
8185 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8186 rpc_restart_call_prepare(task);
8190 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
8192 dprintk("<-- %s\n", __func__);
8195 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8197 struct nfs4_sequence_data *calldata = data;
8198 struct nfs_client *clp = calldata->clp;
8199 struct nfs4_sequence_args *args;
8200 struct nfs4_sequence_res *res;
8202 args = task->tk_msg.rpc_argp;
8203 res = task->tk_msg.rpc_resp;
8205 nfs41_setup_sequence(clp->cl_session, args, res, task);
8208 static const struct rpc_call_ops nfs41_sequence_ops = {
8209 .rpc_call_done = nfs41_sequence_call_done,
8210 .rpc_call_prepare = nfs41_sequence_prepare,
8211 .rpc_release = nfs41_sequence_release,
8214 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8215 struct rpc_cred *cred,
8218 struct nfs4_sequence_data *calldata;
8219 struct rpc_message msg = {
8220 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8223 struct rpc_task_setup task_setup_data = {
8224 .rpc_client = clp->cl_rpcclient,
8225 .rpc_message = &msg,
8226 .callback_ops = &nfs41_sequence_ops,
8227 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
8230 if (!atomic_inc_not_zero(&clp->cl_count))
8231 return ERR_PTR(-EIO);
8232 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8233 if (calldata == NULL) {
8234 nfs_put_client(clp);
8235 return ERR_PTR(-ENOMEM);
8237 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8239 nfs4_set_sequence_privileged(&calldata->args);
8240 msg.rpc_argp = &calldata->args;
8241 msg.rpc_resp = &calldata->res;
8242 calldata->clp = clp;
8243 task_setup_data.callback_data = calldata;
8245 return rpc_run_task(&task_setup_data);
8248 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
8250 struct rpc_task *task;
8253 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
8255 task = _nfs41_proc_sequence(clp, cred, false);
8257 ret = PTR_ERR(task);
8259 rpc_put_task_async(task);
8260 dprintk("<-- %s status=%d\n", __func__, ret);
8264 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8266 struct rpc_task *task;
8269 task = _nfs41_proc_sequence(clp, cred, true);
8271 ret = PTR_ERR(task);
8274 ret = rpc_wait_for_completion_task(task);
8276 ret = task->tk_status;
8279 dprintk("<-- %s status=%d\n", __func__, ret);
8283 struct nfs4_reclaim_complete_data {
8284 struct nfs_client *clp;
8285 struct nfs41_reclaim_complete_args arg;
8286 struct nfs41_reclaim_complete_res res;
8289 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8291 struct nfs4_reclaim_complete_data *calldata = data;
8293 nfs41_setup_sequence(calldata->clp->cl_session,
8294 &calldata->arg.seq_args,
8295 &calldata->res.seq_res,
8299 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8301 switch(task->tk_status) {
8303 case -NFS4ERR_COMPLETE_ALREADY:
8304 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8306 case -NFS4ERR_DELAY:
8307 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8309 case -NFS4ERR_RETRY_UNCACHED_REP:
8312 nfs4_schedule_lease_recovery(clp);
8317 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8319 struct nfs4_reclaim_complete_data *calldata = data;
8320 struct nfs_client *clp = calldata->clp;
8321 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8323 dprintk("--> %s\n", __func__);
8324 if (!nfs41_sequence_done(task, res))
8327 trace_nfs4_reclaim_complete(clp, task->tk_status);
8328 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8329 rpc_restart_call_prepare(task);
8332 dprintk("<-- %s\n", __func__);
8335 static void nfs4_free_reclaim_complete_data(void *data)
8337 struct nfs4_reclaim_complete_data *calldata = data;
8342 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8343 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8344 .rpc_call_done = nfs4_reclaim_complete_done,
8345 .rpc_release = nfs4_free_reclaim_complete_data,
8349 * Issue a global reclaim complete.
8351 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8352 struct rpc_cred *cred)
8354 struct nfs4_reclaim_complete_data *calldata;
8355 struct rpc_task *task;
8356 struct rpc_message msg = {
8357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
8360 struct rpc_task_setup task_setup_data = {
8361 .rpc_client = clp->cl_rpcclient,
8362 .rpc_message = &msg,
8363 .callback_ops = &nfs4_reclaim_complete_call_ops,
8364 .flags = RPC_TASK_ASYNC,
8366 int status = -ENOMEM;
8368 dprintk("--> %s\n", __func__);
8369 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8370 if (calldata == NULL)
8372 calldata->clp = clp;
8373 calldata->arg.one_fs = 0;
8375 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8376 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
8377 msg.rpc_argp = &calldata->arg;
8378 msg.rpc_resp = &calldata->res;
8379 task_setup_data.callback_data = calldata;
8380 task = rpc_run_task(&task_setup_data);
8382 status = PTR_ERR(task);
8385 status = nfs4_wait_for_completion_rpc_task(task);
8387 status = task->tk_status;
8391 dprintk("<-- %s status=%d\n", __func__, status);
8396 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8398 struct nfs4_layoutget *lgp = calldata;
8399 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8400 struct nfs4_session *session = nfs4_get_session(server);
8402 dprintk("--> %s\n", __func__);
8403 nfs41_setup_sequence(session, &lgp->args.seq_args,
8404 &lgp->res.seq_res, task);
8405 dprintk("<-- %s\n", __func__);
8408 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8410 struct nfs4_layoutget *lgp = calldata;
8412 dprintk("--> %s\n", __func__);
8413 nfs41_sequence_process(task, &lgp->res.seq_res);
8414 dprintk("<-- %s\n", __func__);
8418 nfs4_layoutget_handle_exception(struct rpc_task *task,
8419 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8421 struct inode *inode = lgp->args.inode;
8422 struct nfs_server *server = NFS_SERVER(inode);
8423 struct pnfs_layout_hdr *lo;
8424 int nfs4err = task->tk_status;
8425 int err, status = 0;
8428 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
8435 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8436 * on the file. set tk_status to -ENODATA to tell upper layer to
8439 case -NFS4ERR_LAYOUTUNAVAILABLE:
8443 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8444 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8446 case -NFS4ERR_BADLAYOUT:
8447 status = -EOVERFLOW;
8450 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
8451 * (or clients) writing to the same RAID stripe except when
8452 * the minlength argument is 0 (see RFC5661 section 18.43.3).
8454 * Treat it like we would RECALLCONFLICT -- we retry for a little
8455 * while, and then eventually give up.
8457 case -NFS4ERR_LAYOUTTRYLATER:
8458 if (lgp->args.minlength == 0) {
8459 status = -EOVERFLOW;
8464 case -NFS4ERR_RECALLCONFLICT:
8465 status = -ERECALLCONFLICT;
8467 case -NFS4ERR_DELEG_REVOKED:
8468 case -NFS4ERR_ADMIN_REVOKED:
8469 case -NFS4ERR_EXPIRED:
8470 case -NFS4ERR_BAD_STATEID:
8471 exception->timeout = 0;
8472 spin_lock(&inode->i_lock);
8473 lo = NFS_I(inode)->layout;
8474 /* If the open stateid was bad, then recover it. */
8475 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8476 nfs4_stateid_match_other(&lgp->args.stateid,
8477 &lgp->args.ctx->state->stateid)) {
8478 spin_unlock(&inode->i_lock);
8479 exception->state = lgp->args.ctx->state;
8480 exception->stateid = &lgp->args.stateid;
8485 * Mark the bad layout state as invalid, then retry
8487 pnfs_mark_layout_stateid_invalid(lo, &head);
8488 spin_unlock(&inode->i_lock);
8489 pnfs_free_lseg_list(&head);
8494 nfs4_sequence_free_slot(&lgp->res.seq_res);
8495 err = nfs4_handle_exception(server, nfs4err, exception);
8497 if (exception->retry)
8503 dprintk("<-- %s\n", __func__);
8507 static size_t max_response_pages(struct nfs_server *server)
8509 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8510 return nfs_page_array_len(0, max_resp_sz);
8513 static void nfs4_free_pages(struct page **pages, size_t size)
8520 for (i = 0; i < size; i++) {
8523 __free_page(pages[i]);
8528 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8530 struct page **pages;
8533 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8535 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8539 for (i = 0; i < size; i++) {
8540 pages[i] = alloc_page(gfp_flags);
8542 dprintk("%s: failed to allocate page\n", __func__);
8543 nfs4_free_pages(pages, size);
8551 static void nfs4_layoutget_release(void *calldata)
8553 struct nfs4_layoutget *lgp = calldata;
8554 struct inode *inode = lgp->args.inode;
8555 struct nfs_server *server = NFS_SERVER(inode);
8556 size_t max_pages = max_response_pages(server);
8558 dprintk("--> %s\n", __func__);
8559 nfs4_free_pages(lgp->args.layout.pages, max_pages);
8560 pnfs_put_layout_hdr(NFS_I(inode)->layout);
8561 put_nfs_open_context(lgp->args.ctx);
8563 dprintk("<-- %s\n", __func__);
8566 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8567 .rpc_call_prepare = nfs4_layoutget_prepare,
8568 .rpc_call_done = nfs4_layoutget_done,
8569 .rpc_release = nfs4_layoutget_release,
8572 struct pnfs_layout_segment *
8573 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
8575 struct inode *inode = lgp->args.inode;
8576 struct nfs_server *server = NFS_SERVER(inode);
8577 size_t max_pages = max_response_pages(server);
8578 struct rpc_task *task;
8579 struct rpc_message msg = {
8580 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8581 .rpc_argp = &lgp->args,
8582 .rpc_resp = &lgp->res,
8583 .rpc_cred = lgp->cred,
8585 struct rpc_task_setup task_setup_data = {
8586 .rpc_client = server->client,
8587 .rpc_message = &msg,
8588 .callback_ops = &nfs4_layoutget_call_ops,
8589 .callback_data = lgp,
8590 .flags = RPC_TASK_ASYNC,
8592 struct pnfs_layout_segment *lseg = NULL;
8593 struct nfs4_exception exception = {
8595 .timeout = *timeout,
8599 dprintk("--> %s\n", __func__);
8601 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8602 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8604 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8605 if (!lgp->args.layout.pages) {
8606 nfs4_layoutget_release(lgp);
8607 return ERR_PTR(-ENOMEM);
8609 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8611 lgp->res.layoutp = &lgp->args.layout;
8612 lgp->res.seq_res.sr_slot = NULL;
8613 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
8615 task = rpc_run_task(&task_setup_data);
8617 return ERR_CAST(task);
8618 status = nfs4_wait_for_completion_rpc_task(task);
8620 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8621 *timeout = exception.timeout;
8624 trace_nfs4_layoutget(lgp->args.ctx,
8630 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8631 if (status == 0 && lgp->res.layoutp->len)
8632 lseg = pnfs_layout_process(lgp);
8633 nfs4_sequence_free_slot(&lgp->res.seq_res);
8635 dprintk("<-- %s status=%d\n", __func__, status);
8637 return ERR_PTR(status);
8642 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8644 struct nfs4_layoutreturn *lrp = calldata;
8646 dprintk("--> %s\n", __func__);
8647 nfs41_setup_sequence(lrp->clp->cl_session,
8648 &lrp->args.seq_args,
8653 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8655 struct nfs4_layoutreturn *lrp = calldata;
8656 struct nfs_server *server;
8658 dprintk("--> %s\n", __func__);
8660 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
8663 server = NFS_SERVER(lrp->args.inode);
8664 switch (task->tk_status) {
8666 task->tk_status = 0;
8669 case -NFS4ERR_DELAY:
8670 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
8672 nfs4_sequence_free_slot(&lrp->res.seq_res);
8673 rpc_restart_call_prepare(task);
8676 dprintk("<-- %s\n", __func__);
8679 static void nfs4_layoutreturn_release(void *calldata)
8681 struct nfs4_layoutreturn *lrp = calldata;
8682 struct pnfs_layout_hdr *lo = lrp->args.layout;
8684 dprintk("--> %s\n", __func__);
8685 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
8686 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
8687 nfs4_sequence_free_slot(&lrp->res.seq_res);
8688 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8689 lrp->ld_private.ops->free(&lrp->ld_private);
8690 pnfs_put_layout_hdr(lrp->args.layout);
8691 nfs_iput_and_deactive(lrp->inode);
8693 dprintk("<-- %s\n", __func__);
8696 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8697 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8698 .rpc_call_done = nfs4_layoutreturn_done,
8699 .rpc_release = nfs4_layoutreturn_release,
8702 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
8704 struct rpc_task *task;
8705 struct rpc_message msg = {
8706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8707 .rpc_argp = &lrp->args,
8708 .rpc_resp = &lrp->res,
8709 .rpc_cred = lrp->cred,
8711 struct rpc_task_setup task_setup_data = {
8712 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
8713 .rpc_message = &msg,
8714 .callback_ops = &nfs4_layoutreturn_call_ops,
8715 .callback_data = lrp,
8719 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8720 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8721 &task_setup_data.rpc_client, &msg);
8723 dprintk("--> %s\n", __func__);
8725 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8727 nfs4_layoutreturn_release(lrp);
8730 task_setup_data.flags |= RPC_TASK_ASYNC;
8732 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
8733 task = rpc_run_task(&task_setup_data);
8735 return PTR_ERR(task);
8737 status = task->tk_status;
8738 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
8739 dprintk("<-- %s status=%d\n", __func__, status);
8745 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
8746 struct pnfs_device *pdev,
8747 struct rpc_cred *cred)
8749 struct nfs4_getdeviceinfo_args args = {
8751 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8752 NOTIFY_DEVICEID4_DELETE,
8754 struct nfs4_getdeviceinfo_res res = {
8757 struct rpc_message msg = {
8758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8765 dprintk("--> %s\n", __func__);
8766 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
8767 if (res.notification & ~args.notify_types)
8768 dprintk("%s: unsupported notification\n", __func__);
8769 if (res.notification != args.notify_types)
8772 dprintk("<-- %s status=%d\n", __func__, status);
8777 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8778 struct pnfs_device *pdev,
8779 struct rpc_cred *cred)
8781 struct nfs4_exception exception = { };
8785 err = nfs4_handle_exception(server,
8786 _nfs4_proc_getdeviceinfo(server, pdev, cred),
8788 } while (exception.retry);
8791 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8793 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8795 struct nfs4_layoutcommit_data *data = calldata;
8796 struct nfs_server *server = NFS_SERVER(data->args.inode);
8797 struct nfs4_session *session = nfs4_get_session(server);
8799 nfs41_setup_sequence(session,
8800 &data->args.seq_args,
8806 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8808 struct nfs4_layoutcommit_data *data = calldata;
8809 struct nfs_server *server = NFS_SERVER(data->args.inode);
8811 if (!nfs41_sequence_done(task, &data->res.seq_res))
8814 switch (task->tk_status) { /* Just ignore these failures */
8815 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8816 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8817 case -NFS4ERR_BADLAYOUT: /* no layout */
8818 case -NFS4ERR_GRACE: /* loca_recalim always false */
8819 task->tk_status = 0;
8823 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8824 rpc_restart_call_prepare(task);
8830 static void nfs4_layoutcommit_release(void *calldata)
8832 struct nfs4_layoutcommit_data *data = calldata;
8834 pnfs_cleanup_layoutcommit(data);
8835 nfs_post_op_update_inode_force_wcc(data->args.inode,
8837 put_rpccred(data->cred);
8838 nfs_iput_and_deactive(data->inode);
8842 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8843 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8844 .rpc_call_done = nfs4_layoutcommit_done,
8845 .rpc_release = nfs4_layoutcommit_release,
8849 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8851 struct rpc_message msg = {
8852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8853 .rpc_argp = &data->args,
8854 .rpc_resp = &data->res,
8855 .rpc_cred = data->cred,
8857 struct rpc_task_setup task_setup_data = {
8858 .task = &data->task,
8859 .rpc_client = NFS_CLIENT(data->args.inode),
8860 .rpc_message = &msg,
8861 .callback_ops = &nfs4_layoutcommit_ops,
8862 .callback_data = data,
8864 struct rpc_task *task;
8867 dprintk("NFS: initiating layoutcommit call. sync %d "
8868 "lbw: %llu inode %lu\n", sync,
8869 data->args.lastbytewritten,
8870 data->args.inode->i_ino);
8873 data->inode = nfs_igrab_and_active(data->args.inode);
8874 if (data->inode == NULL) {
8875 nfs4_layoutcommit_release(data);
8878 task_setup_data.flags = RPC_TASK_ASYNC;
8880 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8881 task = rpc_run_task(&task_setup_data);
8883 return PTR_ERR(task);
8885 status = task->tk_status;
8886 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
8887 dprintk("%s: status %d\n", __func__, status);
8893 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8894 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8897 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8898 struct nfs_fsinfo *info,
8899 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8901 struct nfs41_secinfo_no_name_args args = {
8902 .style = SECINFO_STYLE_CURRENT_FH,
8904 struct nfs4_secinfo_res res = {
8907 struct rpc_message msg = {
8908 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8912 struct rpc_clnt *clnt = server->client;
8913 struct rpc_cred *cred = NULL;
8916 if (use_integrity) {
8917 clnt = server->nfs_client->cl_rpcclient;
8918 cred = nfs4_get_clid_cred(server->nfs_client);
8919 msg.rpc_cred = cred;
8922 dprintk("--> %s\n", __func__);
8923 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8925 dprintk("<-- %s status=%d\n", __func__, status);
8934 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8935 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8937 struct nfs4_exception exception = { };
8940 /* first try using integrity protection */
8941 err = -NFS4ERR_WRONGSEC;
8943 /* try to use integrity protection with machine cred */
8944 if (_nfs4_is_integrity_protected(server->nfs_client))
8945 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8949 * if unable to use integrity protection, or SECINFO with
8950 * integrity protection returns NFS4ERR_WRONGSEC (which is
8951 * disallowed by spec, but exists in deployed servers) use
8952 * the current filesystem's rpc_client and the user cred.
8954 if (err == -NFS4ERR_WRONGSEC)
8955 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8960 case -NFS4ERR_WRONGSEC:
8964 err = nfs4_handle_exception(server, err, &exception);
8966 } while (exception.retry);
8972 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8973 struct nfs_fsinfo *info)
8977 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8978 struct nfs4_secinfo_flavors *flavors;
8979 struct nfs4_secinfo4 *secinfo;
8982 page = alloc_page(GFP_KERNEL);
8988 flavors = page_address(page);
8989 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8992 * Fall back on "guess and check" method if
8993 * the server doesn't support SECINFO_NO_NAME
8995 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8996 err = nfs4_find_root_sec(server, fhandle, info);
9002 for (i = 0; i < flavors->num_flavors; i++) {
9003 secinfo = &flavors->flavors[i];
9005 switch (secinfo->flavor) {
9009 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
9010 &secinfo->flavor_info);
9013 flavor = RPC_AUTH_MAXFLAVOR;
9017 if (!nfs_auth_info_match(&server->auth_info, flavor))
9018 flavor = RPC_AUTH_MAXFLAVOR;
9020 if (flavor != RPC_AUTH_MAXFLAVOR) {
9021 err = nfs4_lookup_root_sec(server, fhandle,
9028 if (flavor == RPC_AUTH_MAXFLAVOR)
9039 static int _nfs41_test_stateid(struct nfs_server *server,
9040 nfs4_stateid *stateid,
9041 struct rpc_cred *cred)
9044 struct nfs41_test_stateid_args args = {
9047 struct nfs41_test_stateid_res res;
9048 struct rpc_message msg = {
9049 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
9054 struct rpc_clnt *rpc_client = server->client;
9056 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9059 dprintk("NFS call test_stateid %p\n", stateid);
9060 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
9061 nfs4_set_sequence_privileged(&args.seq_args);
9062 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
9063 &args.seq_args, &res.seq_res);
9064 if (status != NFS_OK) {
9065 dprintk("NFS reply test_stateid: failed, %d\n", status);
9068 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
9072 static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
9073 int err, struct nfs4_exception *exception)
9075 exception->retry = 0;
9077 case -NFS4ERR_DELAY:
9078 case -NFS4ERR_RETRY_UNCACHED_REP:
9079 nfs4_handle_exception(server, err, exception);
9081 case -NFS4ERR_BADSESSION:
9082 case -NFS4ERR_BADSLOT:
9083 case -NFS4ERR_BAD_HIGH_SLOT:
9084 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9085 case -NFS4ERR_DEADSESSION:
9086 nfs4_do_handle_exception(server, err, exception);
9091 * nfs41_test_stateid - perform a TEST_STATEID operation
9093 * @server: server / transport on which to perform the operation
9094 * @stateid: state ID to test
9097 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9098 * Otherwise a negative NFS4ERR value is returned if the operation
9099 * failed or the state ID is not currently valid.
9101 static int nfs41_test_stateid(struct nfs_server *server,
9102 nfs4_stateid *stateid,
9103 struct rpc_cred *cred)
9105 struct nfs4_exception exception = { };
9108 err = _nfs41_test_stateid(server, stateid, cred);
9109 nfs4_handle_delay_or_session_error(server, err, &exception);
9110 } while (exception.retry);
9114 struct nfs_free_stateid_data {
9115 struct nfs_server *server;
9116 struct nfs41_free_stateid_args args;
9117 struct nfs41_free_stateid_res res;
9120 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9122 struct nfs_free_stateid_data *data = calldata;
9123 nfs41_setup_sequence(nfs4_get_session(data->server),
9124 &data->args.seq_args,
9129 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9131 struct nfs_free_stateid_data *data = calldata;
9133 nfs41_sequence_done(task, &data->res.seq_res);
9135 switch (task->tk_status) {
9136 case -NFS4ERR_DELAY:
9137 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
9138 rpc_restart_call_prepare(task);
9142 static void nfs41_free_stateid_release(void *calldata)
9147 static const struct rpc_call_ops nfs41_free_stateid_ops = {
9148 .rpc_call_prepare = nfs41_free_stateid_prepare,
9149 .rpc_call_done = nfs41_free_stateid_done,
9150 .rpc_release = nfs41_free_stateid_release,
9153 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
9154 const nfs4_stateid *stateid,
9155 struct rpc_cred *cred,
9158 struct rpc_message msg = {
9159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9162 struct rpc_task_setup task_setup = {
9163 .rpc_client = server->client,
9164 .rpc_message = &msg,
9165 .callback_ops = &nfs41_free_stateid_ops,
9166 .flags = RPC_TASK_ASYNC,
9168 struct nfs_free_stateid_data *data;
9170 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9171 &task_setup.rpc_client, &msg);
9173 dprintk("NFS call free_stateid %p\n", stateid);
9174 data = kmalloc(sizeof(*data), GFP_NOFS);
9176 return ERR_PTR(-ENOMEM);
9177 data->server = server;
9178 nfs4_stateid_copy(&data->args.stateid, stateid);
9180 task_setup.callback_data = data;
9182 msg.rpc_argp = &data->args;
9183 msg.rpc_resp = &data->res;
9184 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
9186 nfs4_set_sequence_privileged(&data->args.seq_args);
9188 return rpc_run_task(&task_setup);
9192 * nfs41_free_stateid - perform a FREE_STATEID operation
9194 * @server: server / transport on which to perform the operation
9195 * @stateid: state ID to release
9197 * @is_recovery: set to true if this call needs to be privileged
9199 * Note: this function is always asynchronous.
9201 static int nfs41_free_stateid(struct nfs_server *server,
9202 const nfs4_stateid *stateid,
9203 struct rpc_cred *cred,
9206 struct rpc_task *task;
9208 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
9210 return PTR_ERR(task);
9216 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
9218 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
9220 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
9221 nfs4_free_lock_state(server, lsp);
9224 static bool nfs41_match_stateid(const nfs4_stateid *s1,
9225 const nfs4_stateid *s2)
9227 if (s1->type != s2->type)
9230 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
9233 if (s1->seqid == s2->seqid)
9235 if (s1->seqid == 0 || s2->seqid == 0)
9241 #endif /* CONFIG_NFS_V4_1 */
9243 static bool nfs4_match_stateid(const nfs4_stateid *s1,
9244 const nfs4_stateid *s2)
9246 return nfs4_stateid_match(s1, s2);
9250 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
9251 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9252 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9253 .recover_open = nfs4_open_reclaim,
9254 .recover_lock = nfs4_lock_reclaim,
9255 .establish_clid = nfs4_init_clientid,
9256 .detect_trunking = nfs40_discover_server_trunking,
9259 #if defined(CONFIG_NFS_V4_1)
9260 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
9261 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9262 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9263 .recover_open = nfs4_open_reclaim,
9264 .recover_lock = nfs4_lock_reclaim,
9265 .establish_clid = nfs41_init_clientid,
9266 .reclaim_complete = nfs41_proc_reclaim_complete,
9267 .detect_trunking = nfs41_discover_server_trunking,
9269 #endif /* CONFIG_NFS_V4_1 */
9271 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
9272 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9273 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9274 .recover_open = nfs40_open_expired,
9275 .recover_lock = nfs4_lock_expired,
9276 .establish_clid = nfs4_init_clientid,
9279 #if defined(CONFIG_NFS_V4_1)
9280 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
9281 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9282 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9283 .recover_open = nfs41_open_expired,
9284 .recover_lock = nfs41_lock_expired,
9285 .establish_clid = nfs41_init_clientid,
9287 #endif /* CONFIG_NFS_V4_1 */
9289 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
9290 .sched_state_renewal = nfs4_proc_async_renew,
9291 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
9292 .renew_lease = nfs4_proc_renew,
9295 #if defined(CONFIG_NFS_V4_1)
9296 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
9297 .sched_state_renewal = nfs41_proc_async_sequence,
9298 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
9299 .renew_lease = nfs4_proc_sequence,
9303 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
9304 .get_locations = _nfs40_proc_get_locations,
9305 .fsid_present = _nfs40_proc_fsid_present,
9308 #if defined(CONFIG_NFS_V4_1)
9309 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
9310 .get_locations = _nfs41_proc_get_locations,
9311 .fsid_present = _nfs41_proc_fsid_present,
9313 #endif /* CONFIG_NFS_V4_1 */
9315 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9317 .init_caps = NFS_CAP_READDIRPLUS
9318 | NFS_CAP_ATOMIC_OPEN
9319 | NFS_CAP_POSIX_LOCK,
9320 .init_client = nfs40_init_client,
9321 .shutdown_client = nfs40_shutdown_client,
9322 .match_stateid = nfs4_match_stateid,
9323 .find_root_sec = nfs4_find_root_sec,
9324 .free_lock_state = nfs4_release_lockowner,
9325 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
9326 .alloc_seqid = nfs_alloc_seqid,
9327 .call_sync_ops = &nfs40_call_sync_ops,
9328 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9329 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9330 .state_renewal_ops = &nfs40_state_renewal_ops,
9331 .mig_recovery_ops = &nfs40_mig_recovery_ops,
9334 #if defined(CONFIG_NFS_V4_1)
9335 static struct nfs_seqid *
9336 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9341 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9343 .init_caps = NFS_CAP_READDIRPLUS
9344 | NFS_CAP_ATOMIC_OPEN
9345 | NFS_CAP_POSIX_LOCK
9346 | NFS_CAP_STATEID_NFSV41
9347 | NFS_CAP_ATOMIC_OPEN_V1,
9348 .init_client = nfs41_init_client,
9349 .shutdown_client = nfs41_shutdown_client,
9350 .match_stateid = nfs41_match_stateid,
9351 .find_root_sec = nfs41_find_root_sec,
9352 .free_lock_state = nfs41_free_lock_state,
9353 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9354 .alloc_seqid = nfs_alloc_no_seqid,
9355 .session_trunk = nfs4_test_session_trunk,
9356 .call_sync_ops = &nfs41_call_sync_ops,
9357 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9358 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9359 .state_renewal_ops = &nfs41_state_renewal_ops,
9360 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9364 #if defined(CONFIG_NFS_V4_2)
9365 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9367 .init_caps = NFS_CAP_READDIRPLUS
9368 | NFS_CAP_ATOMIC_OPEN
9369 | NFS_CAP_POSIX_LOCK
9370 | NFS_CAP_STATEID_NFSV41
9371 | NFS_CAP_ATOMIC_OPEN_V1
9374 | NFS_CAP_DEALLOCATE
9376 | NFS_CAP_LAYOUTSTATS
9378 .init_client = nfs41_init_client,
9379 .shutdown_client = nfs41_shutdown_client,
9380 .match_stateid = nfs41_match_stateid,
9381 .find_root_sec = nfs41_find_root_sec,
9382 .free_lock_state = nfs41_free_lock_state,
9383 .call_sync_ops = &nfs41_call_sync_ops,
9384 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9385 .alloc_seqid = nfs_alloc_no_seqid,
9386 .session_trunk = nfs4_test_session_trunk,
9387 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9388 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9389 .state_renewal_ops = &nfs41_state_renewal_ops,
9390 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9394 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9395 [0] = &nfs_v4_0_minor_ops,
9396 #if defined(CONFIG_NFS_V4_1)
9397 [1] = &nfs_v4_1_minor_ops,
9399 #if defined(CONFIG_NFS_V4_2)
9400 [2] = &nfs_v4_2_minor_ops,
9404 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
9406 ssize_t error, error2;
9408 error = generic_listxattr(dentry, list, size);
9416 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9419 return error + error2;
9422 static const struct inode_operations nfs4_dir_inode_operations = {
9423 .create = nfs_create,
9424 .lookup = nfs_lookup,
9425 .atomic_open = nfs_atomic_open,
9427 .unlink = nfs_unlink,
9428 .symlink = nfs_symlink,
9432 .rename = nfs_rename,
9433 .permission = nfs_permission,
9434 .getattr = nfs_getattr,
9435 .setattr = nfs_setattr,
9436 .listxattr = nfs4_listxattr,
9439 static const struct inode_operations nfs4_file_inode_operations = {
9440 .permission = nfs_permission,
9441 .getattr = nfs_getattr,
9442 .setattr = nfs_setattr,
9443 .listxattr = nfs4_listxattr,
9446 const struct nfs_rpc_ops nfs_v4_clientops = {
9447 .version = 4, /* protocol version */
9448 .dentry_ops = &nfs4_dentry_operations,
9449 .dir_inode_ops = &nfs4_dir_inode_operations,
9450 .file_inode_ops = &nfs4_file_inode_operations,
9451 .file_ops = &nfs4_file_operations,
9452 .getroot = nfs4_proc_get_root,
9453 .submount = nfs4_submount,
9454 .try_mount = nfs4_try_mount,
9455 .getattr = nfs4_proc_getattr,
9456 .setattr = nfs4_proc_setattr,
9457 .lookup = nfs4_proc_lookup,
9458 .access = nfs4_proc_access,
9459 .readlink = nfs4_proc_readlink,
9460 .create = nfs4_proc_create,
9461 .remove = nfs4_proc_remove,
9462 .unlink_setup = nfs4_proc_unlink_setup,
9463 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
9464 .unlink_done = nfs4_proc_unlink_done,
9465 .rename_setup = nfs4_proc_rename_setup,
9466 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
9467 .rename_done = nfs4_proc_rename_done,
9468 .link = nfs4_proc_link,
9469 .symlink = nfs4_proc_symlink,
9470 .mkdir = nfs4_proc_mkdir,
9471 .rmdir = nfs4_proc_remove,
9472 .readdir = nfs4_proc_readdir,
9473 .mknod = nfs4_proc_mknod,
9474 .statfs = nfs4_proc_statfs,
9475 .fsinfo = nfs4_proc_fsinfo,
9476 .pathconf = nfs4_proc_pathconf,
9477 .set_capabilities = nfs4_server_capabilities,
9478 .decode_dirent = nfs4_decode_dirent,
9479 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
9480 .read_setup = nfs4_proc_read_setup,
9481 .read_done = nfs4_read_done,
9482 .write_setup = nfs4_proc_write_setup,
9483 .write_done = nfs4_write_done,
9484 .commit_setup = nfs4_proc_commit_setup,
9485 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
9486 .commit_done = nfs4_commit_done,
9487 .lock = nfs4_proc_lock,
9488 .clear_acl_cache = nfs4_zap_acl_attr,
9489 .close_context = nfs4_close_context,
9490 .open_context = nfs4_atomic_open,
9491 .have_delegation = nfs4_have_delegation,
9492 .return_delegation = nfs4_inode_return_delegation,
9493 .alloc_client = nfs4_alloc_client,
9494 .init_client = nfs4_init_client,
9495 .free_client = nfs4_free_client,
9496 .create_server = nfs4_create_server,
9497 .clone_server = nfs_clone_server,
9500 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
9501 .name = XATTR_NAME_NFSV4_ACL,
9502 .list = nfs4_xattr_list_nfs4_acl,
9503 .get = nfs4_xattr_get_nfs4_acl,
9504 .set = nfs4_xattr_set_nfs4_acl,
9507 const struct xattr_handler *nfs4_xattr_handlers[] = {
9508 &nfs4_xattr_nfs4_acl_handler,
9509 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
9510 &nfs4_xattr_nfs4_label_handler,