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/file.h>
42 #include <linux/string.h>
43 #include <linux/ratelimit.h>
44 #include <linux/printk.h>
45 #include <linux/slab.h>
46 #include <linux/sunrpc/clnt.h>
47 #include <linux/nfs.h>
48 #include <linux/nfs4.h>
49 #include <linux/nfs_fs.h>
50 #include <linux/nfs_page.h>
51 #include <linux/nfs_mount.h>
52 #include <linux/namei.h>
53 #include <linux/mount.h>
54 #include <linux/module.h>
55 #include <linux/xattr.h>
56 #include <linux/utsname.h>
57 #include <linux/freezer.h>
60 #include "delegation.h"
66 #include "nfs4idmap.h"
67 #include "nfs4session.h"
70 #include "nfs4trace.h"
72 #define NFSDBG_FACILITY NFSDBG_PROC
74 #define NFS4_POLL_RETRY_MIN (HZ/10)
75 #define NFS4_POLL_RETRY_MAX (15*HZ)
78 static int _nfs4_proc_open(struct nfs4_opendata *data);
79 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
80 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
82 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
84 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
88 #ifdef CONFIG_NFS_V4_1
89 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
91 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
95 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
96 static inline struct nfs4_label *
97 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
116 nfs4_label_release_security(struct nfs4_label *label)
119 security_release_secctx(label->label, label->len);
121 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
124 return server->attr_bitmask;
126 return server->attr_bitmask_nl;
129 static inline struct nfs4_label *
130 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
134 nfs4_label_release_security(struct nfs4_label *label)
137 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138 { return server->attr_bitmask; }
141 /* Prevent leaks of NFSv4 errors into userland */
142 static int nfs4_map_errors(int err)
147 case -NFS4ERR_RESOURCE:
148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
151 case -NFS4ERR_WRONGSEC:
152 case -NFS4ERR_WRONG_CRED:
154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
157 case -NFS4ERR_SHARE_DENIED:
159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
161 case -NFS4ERR_FILE_OPEN:
164 dprintk("%s could not handle NFSv4 error %d\n",
172 * This is our standard bitmap for GETATTR requests.
174 const u32 nfs4_fattr_bitmap[3] = {
176 | FATTR4_WORD0_CHANGE
179 | FATTR4_WORD0_FILEID,
181 | FATTR4_WORD1_NUMLINKS
183 | FATTR4_WORD1_OWNER_GROUP
184 | FATTR4_WORD1_RAWDEV
185 | FATTR4_WORD1_SPACE_USED
186 | FATTR4_WORD1_TIME_ACCESS
187 | FATTR4_WORD1_TIME_METADATA
188 | FATTR4_WORD1_TIME_MODIFY
189 | FATTR4_WORD1_MOUNTED_ON_FILEID,
190 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
191 FATTR4_WORD2_SECURITY_LABEL
195 static const u32 nfs4_pnfs_open_bitmap[3] = {
197 | FATTR4_WORD0_CHANGE
200 | FATTR4_WORD0_FILEID,
202 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER_GROUP
205 | FATTR4_WORD1_RAWDEV
206 | FATTR4_WORD1_SPACE_USED
207 | FATTR4_WORD1_TIME_ACCESS
208 | FATTR4_WORD1_TIME_METADATA
209 | FATTR4_WORD1_TIME_MODIFY,
210 FATTR4_WORD2_MDSTHRESHOLD
213 static const u32 nfs4_open_noattr_bitmap[3] = {
215 | FATTR4_WORD0_CHANGE
216 | FATTR4_WORD0_FILEID,
219 const u32 nfs4_statfs_bitmap[3] = {
220 FATTR4_WORD0_FILES_AVAIL
221 | FATTR4_WORD0_FILES_FREE
222 | FATTR4_WORD0_FILES_TOTAL,
223 FATTR4_WORD1_SPACE_AVAIL
224 | FATTR4_WORD1_SPACE_FREE
225 | FATTR4_WORD1_SPACE_TOTAL
228 const u32 nfs4_pathconf_bitmap[3] = {
230 | FATTR4_WORD0_MAXNAME,
234 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
235 | FATTR4_WORD0_MAXREAD
236 | FATTR4_WORD0_MAXWRITE
237 | FATTR4_WORD0_LEASE_TIME,
238 FATTR4_WORD1_TIME_DELTA
239 | FATTR4_WORD1_FS_LAYOUT_TYPES,
240 FATTR4_WORD2_LAYOUT_BLKSIZE
241 | FATTR4_WORD2_CLONE_BLKSIZE
244 const u32 nfs4_fs_locations_bitmap[3] = {
246 | FATTR4_WORD0_CHANGE
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
252 | FATTR4_WORD1_NUMLINKS
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
263 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
264 struct nfs4_readdir_arg *readdir)
269 readdir->cookie = cookie;
270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
286 start = p = kmap_atomic(*readdir->pages);
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
298 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
314 kunmap_atomic(start);
317 static long nfs4_update_delay(long *timeout)
321 return NFS4_POLL_RETRY_MAX;
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
331 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
339 if (fatal_signal_pending(current))
344 /* This is the error handling routine for processes that are allowed
347 static int nfs4_do_handle_exception(struct nfs_server *server,
348 int errorcode, struct nfs4_exception *exception)
350 struct nfs_client *clp = server->nfs_client;
351 struct nfs4_state *state = exception->state;
352 struct inode *inode = exception->inode;
355 exception->delay = 0;
356 exception->recovering = 0;
357 exception->retry = 0;
361 case -NFS4ERR_OPENMODE:
362 case -NFS4ERR_DELEG_REVOKED:
363 case -NFS4ERR_ADMIN_REVOKED:
364 case -NFS4ERR_BAD_STATEID:
365 if (inode && nfs_async_inode_return_delegation(inode,
367 goto wait_on_recovery;
370 ret = nfs4_schedule_stateid_recovery(server, state);
373 goto wait_on_recovery;
374 case -NFS4ERR_EXPIRED:
376 ret = nfs4_schedule_stateid_recovery(server, state);
380 case -NFS4ERR_STALE_STATEID:
381 case -NFS4ERR_STALE_CLIENTID:
382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
385 ret = nfs4_schedule_migration_recovery(server);
388 goto wait_on_recovery;
389 case -NFS4ERR_LEASE_MOVED:
390 nfs4_schedule_lease_moved_recovery(clp);
391 goto wait_on_recovery;
392 #if defined(CONFIG_NFS_V4_1)
393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
403 goto wait_on_recovery;
404 #endif /* defined(CONFIG_NFS_V4_1) */
405 case -NFS4ERR_FILE_OPEN:
406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
414 nfs_inc_server_stats(server, NFSIOS_DELAY);
416 exception->delay = 1;
419 case -NFS4ERR_RETRY_UNCACHED_REP:
420 case -NFS4ERR_OLD_STATEID:
421 exception->retry = 1;
423 case -NFS4ERR_BADOWNER:
424 /* The following works around a Linux server bug! */
425 case -NFS4ERR_BADNAME:
426 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
427 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
428 exception->retry = 1;
429 printk(KERN_WARNING "NFS: v4 server %s "
430 "does not accept raw "
432 "Reenabling the idmapper.\n",
433 server->nfs_client->cl_hostname);
436 /* We failed to handle the error */
437 return nfs4_map_errors(ret);
439 exception->recovering = 1;
443 /* This is the error handling routine for processes that are allowed
446 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
448 struct nfs_client *clp = server->nfs_client;
451 ret = nfs4_do_handle_exception(server, errorcode, exception);
452 if (exception->delay) {
453 ret = nfs4_delay(server->client, &exception->timeout);
456 if (exception->recovering) {
457 ret = nfs4_wait_clnt_recover(clp);
458 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
465 exception->retry = 1;
470 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
471 int errorcode, struct nfs4_exception *exception)
473 struct nfs_client *clp = server->nfs_client;
476 ret = nfs4_do_handle_exception(server, errorcode, exception);
477 if (exception->delay) {
478 rpc_delay(task, nfs4_update_delay(&exception->timeout));
481 if (exception->recovering) {
482 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
483 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
484 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
487 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
492 exception->retry = 1;
497 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
498 struct nfs4_state *state, long *timeout)
500 struct nfs4_exception exception = {
504 if (task->tk_status >= 0)
507 exception.timeout = *timeout;
508 task->tk_status = nfs4_async_handle_exception(task, server,
511 if (exception.delay && timeout)
512 *timeout = exception.timeout;
519 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
520 * or 'false' otherwise.
522 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
524 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
526 if (flavor == RPC_AUTH_GSS_KRB5I ||
527 flavor == RPC_AUTH_GSS_KRB5P)
533 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
535 spin_lock(&clp->cl_lock);
536 if (time_before(clp->cl_last_renewal,timestamp))
537 clp->cl_last_renewal = timestamp;
538 spin_unlock(&clp->cl_lock);
541 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
543 struct nfs_client *clp = server->nfs_client;
545 if (!nfs4_has_session(clp))
546 do_renew_lease(clp, timestamp);
549 struct nfs4_call_sync_data {
550 const struct nfs_server *seq_server;
551 struct nfs4_sequence_args *seq_args;
552 struct nfs4_sequence_res *seq_res;
555 void nfs4_init_sequence(struct nfs4_sequence_args *args,
556 struct nfs4_sequence_res *res, int cache_reply)
558 args->sa_slot = NULL;
559 args->sa_cache_this = cache_reply;
560 args->sa_privileged = 0;
565 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
567 args->sa_privileged = 1;
570 int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
571 struct nfs4_sequence_args *args,
572 struct nfs4_sequence_res *res,
573 struct rpc_task *task)
575 struct nfs4_slot *slot;
577 /* slot already allocated? */
578 if (res->sr_slot != NULL)
581 spin_lock(&tbl->slot_tbl_lock);
582 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
585 slot = nfs4_alloc_slot(tbl);
587 if (slot == ERR_PTR(-ENOMEM))
588 task->tk_timeout = HZ >> 2;
591 spin_unlock(&tbl->slot_tbl_lock);
593 args->sa_slot = slot;
597 rpc_call_start(task);
601 if (args->sa_privileged)
602 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
603 NULL, RPC_PRIORITY_PRIVILEGED);
605 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
606 spin_unlock(&tbl->slot_tbl_lock);
609 EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
611 static int nfs40_sequence_done(struct rpc_task *task,
612 struct nfs4_sequence_res *res)
614 struct nfs4_slot *slot = res->sr_slot;
615 struct nfs4_slot_table *tbl;
621 spin_lock(&tbl->slot_tbl_lock);
622 if (!nfs41_wake_and_assign_slot(tbl, slot))
623 nfs4_free_slot(tbl, slot);
624 spin_unlock(&tbl->slot_tbl_lock);
631 #if defined(CONFIG_NFS_V4_1)
633 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
635 struct nfs4_session *session;
636 struct nfs4_slot_table *tbl;
637 struct nfs4_slot *slot = res->sr_slot;
638 bool send_new_highest_used_slotid = false;
641 session = tbl->session;
643 spin_lock(&tbl->slot_tbl_lock);
644 /* Be nice to the server: try to ensure that the last transmitted
645 * value for highest_user_slotid <= target_highest_slotid
647 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
648 send_new_highest_used_slotid = true;
650 if (nfs41_wake_and_assign_slot(tbl, slot)) {
651 send_new_highest_used_slotid = false;
654 nfs4_free_slot(tbl, slot);
656 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
657 send_new_highest_used_slotid = false;
659 spin_unlock(&tbl->slot_tbl_lock);
661 if (send_new_highest_used_slotid)
662 nfs41_notify_server(session->clp);
665 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
667 struct nfs4_session *session;
668 struct nfs4_slot *slot = res->sr_slot;
669 struct nfs_client *clp;
670 bool interrupted = false;
675 /* don't increment the sequence number if the task wasn't sent */
676 if (!RPC_WAS_SENT(task))
679 session = slot->table->session;
681 if (slot->interrupted) {
682 slot->interrupted = 0;
686 trace_nfs4_sequence_done(session, res);
687 /* Check the SEQUENCE operation status */
688 switch (res->sr_status) {
690 /* Update the slot's sequence and clientid lease timer */
693 do_renew_lease(clp, res->sr_timestamp);
694 /* Check sequence flags */
695 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
696 nfs41_update_target_slotid(slot->table, slot, res);
700 * sr_status remains 1 if an RPC level error occurred.
701 * The server may or may not have processed the sequence
703 * Mark the slot as having hosted an interrupted RPC call.
705 slot->interrupted = 1;
708 /* The server detected a resend of the RPC call and
709 * returned NFS4ERR_DELAY as per Section 2.10.6.2
712 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
717 case -NFS4ERR_BADSLOT:
719 * The slot id we used was probably retired. Try again
720 * using a different slot id.
723 case -NFS4ERR_SEQ_MISORDERED:
725 * Was the last operation on this sequence interrupted?
726 * If so, retry after bumping the sequence number.
733 * Could this slot have been previously retired?
734 * If so, then the server may be expecting seq_nr = 1!
736 if (slot->seq_nr != 1) {
741 case -NFS4ERR_SEQ_FALSE_RETRY:
745 /* Just update the slot sequence no. */
749 /* The session may be reset by one of the error handlers. */
750 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
751 nfs41_sequence_free_slot(res);
755 if (rpc_restart_call_prepare(task)) {
761 if (!rpc_restart_call(task))
763 rpc_delay(task, NFS4_POLL_RETRY_MAX);
766 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
768 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
770 if (res->sr_slot == NULL)
772 if (!res->sr_slot->table->session)
773 return nfs40_sequence_done(task, res);
774 return nfs41_sequence_done(task, res);
776 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
778 int nfs41_setup_sequence(struct nfs4_session *session,
779 struct nfs4_sequence_args *args,
780 struct nfs4_sequence_res *res,
781 struct rpc_task *task)
783 struct nfs4_slot *slot;
784 struct nfs4_slot_table *tbl;
786 dprintk("--> %s\n", __func__);
787 /* slot already allocated? */
788 if (res->sr_slot != NULL)
791 tbl = &session->fc_slot_table;
793 task->tk_timeout = 0;
795 spin_lock(&tbl->slot_tbl_lock);
796 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
797 !args->sa_privileged) {
798 /* The state manager will wait until the slot table is empty */
799 dprintk("%s session is draining\n", __func__);
803 slot = nfs4_alloc_slot(tbl);
805 /* If out of memory, try again in 1/4 second */
806 if (slot == ERR_PTR(-ENOMEM))
807 task->tk_timeout = HZ >> 2;
808 dprintk("<-- %s: no free slots\n", __func__);
811 spin_unlock(&tbl->slot_tbl_lock);
813 args->sa_slot = slot;
815 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
816 slot->slot_nr, slot->seq_nr);
819 res->sr_timestamp = jiffies;
820 res->sr_status_flags = 0;
822 * sr_status is only set in decode_sequence, and so will remain
823 * set to 1 if an rpc level failure occurs.
826 trace_nfs4_setup_sequence(session, args);
828 rpc_call_start(task);
831 /* Privileged tasks are queued with top priority */
832 if (args->sa_privileged)
833 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
834 NULL, RPC_PRIORITY_PRIVILEGED);
836 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
837 spin_unlock(&tbl->slot_tbl_lock);
840 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
842 static int nfs4_setup_sequence(const struct nfs_server *server,
843 struct nfs4_sequence_args *args,
844 struct nfs4_sequence_res *res,
845 struct rpc_task *task)
847 struct nfs4_session *session = nfs4_get_session(server);
851 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
854 dprintk("--> %s clp %p session %p sr_slot %u\n",
855 __func__, session->clp, session, res->sr_slot ?
856 res->sr_slot->slot_nr : NFS4_NO_SLOT);
858 ret = nfs41_setup_sequence(session, args, res, task);
860 dprintk("<-- %s status=%d\n", __func__, ret);
864 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
866 struct nfs4_call_sync_data *data = calldata;
867 struct nfs4_session *session = nfs4_get_session(data->seq_server);
869 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
871 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
874 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
876 struct nfs4_call_sync_data *data = calldata;
878 nfs41_sequence_done(task, data->seq_res);
881 static const struct rpc_call_ops nfs41_call_sync_ops = {
882 .rpc_call_prepare = nfs41_call_sync_prepare,
883 .rpc_call_done = nfs41_call_sync_done,
886 #else /* !CONFIG_NFS_V4_1 */
888 static int nfs4_setup_sequence(const struct nfs_server *server,
889 struct nfs4_sequence_args *args,
890 struct nfs4_sequence_res *res,
891 struct rpc_task *task)
893 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
897 int nfs4_sequence_done(struct rpc_task *task,
898 struct nfs4_sequence_res *res)
900 return nfs40_sequence_done(task, res);
902 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
904 #endif /* !CONFIG_NFS_V4_1 */
906 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
908 struct nfs4_call_sync_data *data = calldata;
909 nfs4_setup_sequence(data->seq_server,
910 data->seq_args, data->seq_res, task);
913 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
915 struct nfs4_call_sync_data *data = calldata;
916 nfs4_sequence_done(task, data->seq_res);
919 static const struct rpc_call_ops nfs40_call_sync_ops = {
920 .rpc_call_prepare = nfs40_call_sync_prepare,
921 .rpc_call_done = nfs40_call_sync_done,
924 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
925 struct nfs_server *server,
926 struct rpc_message *msg,
927 struct nfs4_sequence_args *args,
928 struct nfs4_sequence_res *res)
931 struct rpc_task *task;
932 struct nfs_client *clp = server->nfs_client;
933 struct nfs4_call_sync_data data = {
934 .seq_server = server,
938 struct rpc_task_setup task_setup = {
941 .callback_ops = clp->cl_mvops->call_sync_ops,
942 .callback_data = &data
945 task = rpc_run_task(&task_setup);
949 ret = task->tk_status;
955 int nfs4_call_sync(struct rpc_clnt *clnt,
956 struct nfs_server *server,
957 struct rpc_message *msg,
958 struct nfs4_sequence_args *args,
959 struct nfs4_sequence_res *res,
962 nfs4_init_sequence(args, res, cache_reply);
963 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
966 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
968 struct nfs_inode *nfsi = NFS_I(dir);
970 spin_lock(&dir->i_lock);
971 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
972 if (!cinfo->atomic || cinfo->before != dir->i_version)
973 nfs_force_lookup_revalidate(dir);
974 dir->i_version = cinfo->after;
975 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
976 nfs_fscache_invalidate(dir);
977 spin_unlock(&dir->i_lock);
980 struct nfs4_opendata {
982 struct nfs_openargs o_arg;
983 struct nfs_openres o_res;
984 struct nfs_open_confirmargs c_arg;
985 struct nfs_open_confirmres c_res;
986 struct nfs4_string owner_name;
987 struct nfs4_string group_name;
988 struct nfs4_label *a_label;
989 struct nfs_fattr f_attr;
990 struct nfs4_label *f_label;
992 struct dentry *dentry;
993 struct nfs4_state_owner *owner;
994 struct nfs4_state *state;
996 unsigned long timestamp;
997 unsigned int rpc_done : 1;
998 unsigned int file_created : 1;
999 unsigned int is_recover : 1;
1004 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1005 int err, struct nfs4_exception *exception)
1009 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1011 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1012 exception->retry = 1;
1017 nfs4_map_atomic_open_share(struct nfs_server *server,
1018 fmode_t fmode, int openflags)
1022 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1024 res = NFS4_SHARE_ACCESS_READ;
1027 res = NFS4_SHARE_ACCESS_WRITE;
1029 case FMODE_READ|FMODE_WRITE:
1030 res = NFS4_SHARE_ACCESS_BOTH;
1032 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1034 /* Want no delegation if we're using O_DIRECT */
1035 if (openflags & O_DIRECT)
1036 res |= NFS4_SHARE_WANT_NO_DELEG;
1041 static enum open_claim_type4
1042 nfs4_map_atomic_open_claim(struct nfs_server *server,
1043 enum open_claim_type4 claim)
1045 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1050 case NFS4_OPEN_CLAIM_FH:
1051 return NFS4_OPEN_CLAIM_NULL;
1052 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1053 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1054 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1055 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1059 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1061 p->o_res.f_attr = &p->f_attr;
1062 p->o_res.f_label = p->f_label;
1063 p->o_res.seqid = p->o_arg.seqid;
1064 p->c_res.seqid = p->c_arg.seqid;
1065 p->o_res.server = p->o_arg.server;
1066 p->o_res.access_request = p->o_arg.access;
1067 nfs_fattr_init(&p->f_attr);
1068 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1071 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1072 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1073 const struct iattr *attrs,
1074 struct nfs4_label *label,
1075 enum open_claim_type4 claim,
1078 struct dentry *parent = dget_parent(dentry);
1079 struct inode *dir = d_inode(parent);
1080 struct nfs_server *server = NFS_SERVER(dir);
1081 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1082 struct nfs4_opendata *p;
1084 p = kzalloc(sizeof(*p), gfp_mask);
1088 p->f_label = nfs4_label_alloc(server, gfp_mask);
1089 if (IS_ERR(p->f_label))
1092 p->a_label = nfs4_label_alloc(server, gfp_mask);
1093 if (IS_ERR(p->a_label))
1096 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1097 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1098 if (IS_ERR(p->o_arg.seqid))
1099 goto err_free_label;
1100 nfs_sb_active(dentry->d_sb);
1101 p->dentry = dget(dentry);
1104 atomic_inc(&sp->so_count);
1105 p->o_arg.open_flags = flags;
1106 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1107 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1109 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1110 * will return permission denied for all bits until close */
1111 if (!(flags & O_EXCL)) {
1112 /* ask server to check for all possible rights as results
1114 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1115 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
1117 p->o_arg.clientid = server->nfs_client->cl_clientid;
1118 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1119 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1120 p->o_arg.name = &dentry->d_name;
1121 p->o_arg.server = server;
1122 p->o_arg.bitmask = nfs4_bitmask(server, label);
1123 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1124 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1125 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1126 switch (p->o_arg.claim) {
1127 case NFS4_OPEN_CLAIM_NULL:
1128 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1129 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1130 p->o_arg.fh = NFS_FH(dir);
1132 case NFS4_OPEN_CLAIM_PREVIOUS:
1133 case NFS4_OPEN_CLAIM_FH:
1134 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1135 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1136 p->o_arg.fh = NFS_FH(d_inode(dentry));
1138 if (attrs != NULL && attrs->ia_valid != 0) {
1141 p->o_arg.u.attrs = &p->attrs;
1142 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1145 verf[1] = current->pid;
1146 memcpy(p->o_arg.u.verifier.data, verf,
1147 sizeof(p->o_arg.u.verifier.data));
1149 p->c_arg.fh = &p->o_res.fh;
1150 p->c_arg.stateid = &p->o_res.stateid;
1151 p->c_arg.seqid = p->o_arg.seqid;
1152 nfs4_init_opendata_res(p);
1153 kref_init(&p->kref);
1157 nfs4_label_free(p->a_label);
1159 nfs4_label_free(p->f_label);
1167 static void nfs4_opendata_free(struct kref *kref)
1169 struct nfs4_opendata *p = container_of(kref,
1170 struct nfs4_opendata, kref);
1171 struct super_block *sb = p->dentry->d_sb;
1173 nfs_free_seqid(p->o_arg.seqid);
1174 if (p->state != NULL)
1175 nfs4_put_open_state(p->state);
1176 nfs4_put_state_owner(p->owner);
1178 nfs4_label_free(p->a_label);
1179 nfs4_label_free(p->f_label);
1183 nfs_sb_deactive(sb);
1184 nfs_fattr_free_names(&p->f_attr);
1185 kfree(p->f_attr.mdsthreshold);
1189 static void nfs4_opendata_put(struct nfs4_opendata *p)
1192 kref_put(&p->kref, nfs4_opendata_free);
1195 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1199 ret = rpc_wait_for_completion_task(task);
1203 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1206 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1207 case FMODE_READ|FMODE_WRITE:
1208 return state->n_rdwr != 0;
1210 return state->n_wronly != 0;
1212 return state->n_rdonly != 0;
1218 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1222 if (open_mode & (O_EXCL|O_TRUNC))
1224 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1226 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1227 && state->n_rdonly != 0;
1230 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1231 && state->n_wronly != 0;
1233 case FMODE_READ|FMODE_WRITE:
1234 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1235 && state->n_rdwr != 0;
1241 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1242 enum open_claim_type4 claim)
1244 if (delegation == NULL)
1246 if ((delegation->type & fmode) != fmode)
1248 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1251 case NFS4_OPEN_CLAIM_NULL:
1252 case NFS4_OPEN_CLAIM_FH:
1254 case NFS4_OPEN_CLAIM_PREVIOUS:
1255 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1260 nfs_mark_delegation_referenced(delegation);
1264 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1273 case FMODE_READ|FMODE_WRITE:
1276 nfs4_state_set_mode_locked(state, state->state | fmode);
1279 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1281 struct nfs_client *clp = state->owner->so_server->nfs_client;
1282 bool need_recover = false;
1284 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1285 need_recover = true;
1286 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1287 need_recover = true;
1288 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1289 need_recover = true;
1291 nfs4_state_mark_reclaim_nograce(clp, state);
1294 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1295 nfs4_stateid *stateid)
1297 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1299 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1300 nfs_test_and_clear_all_open_stateid(state);
1303 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1308 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1310 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1312 if (state->n_wronly)
1313 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1314 if (state->n_rdonly)
1315 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1317 set_bit(NFS_O_RDWR_STATE, &state->flags);
1318 set_bit(NFS_OPEN_STATE, &state->flags);
1321 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1322 nfs4_stateid *arg_stateid,
1323 nfs4_stateid *stateid, fmode_t fmode)
1325 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1326 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1328 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1331 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1334 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1335 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1336 clear_bit(NFS_OPEN_STATE, &state->flags);
1338 if (stateid == NULL)
1340 /* Handle races with OPEN */
1341 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1342 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1343 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
1344 nfs_resync_open_stateid_locked(state);
1347 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1348 nfs4_stateid_copy(&state->stateid, stateid);
1349 nfs4_stateid_copy(&state->open_stateid, stateid);
1352 static void nfs_clear_open_stateid(struct nfs4_state *state,
1353 nfs4_stateid *arg_stateid,
1354 nfs4_stateid *stateid, fmode_t fmode)
1356 write_seqlock(&state->seqlock);
1357 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
1358 write_sequnlock(&state->seqlock);
1359 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1360 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1363 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1367 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1370 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1372 case FMODE_READ|FMODE_WRITE:
1373 set_bit(NFS_O_RDWR_STATE, &state->flags);
1375 if (!nfs_need_update_open_stateid(state, stateid))
1377 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1378 nfs4_stateid_copy(&state->stateid, stateid);
1379 nfs4_stateid_copy(&state->open_stateid, stateid);
1382 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1385 * Protect the call to nfs4_state_set_mode_locked and
1386 * serialise the stateid update
1388 spin_lock(&state->owner->so_lock);
1389 write_seqlock(&state->seqlock);
1390 if (deleg_stateid != NULL) {
1391 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1392 set_bit(NFS_DELEGATED_STATE, &state->flags);
1394 if (open_stateid != NULL)
1395 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1396 write_sequnlock(&state->seqlock);
1397 update_open_stateflags(state, fmode);
1398 spin_unlock(&state->owner->so_lock);
1401 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1403 struct nfs_inode *nfsi = NFS_I(state->inode);
1404 struct nfs_delegation *deleg_cur;
1407 fmode &= (FMODE_READ|FMODE_WRITE);
1410 deleg_cur = rcu_dereference(nfsi->delegation);
1411 if (deleg_cur == NULL)
1414 spin_lock(&deleg_cur->lock);
1415 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1416 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1417 (deleg_cur->type & fmode) != fmode)
1418 goto no_delegation_unlock;
1420 if (delegation == NULL)
1421 delegation = &deleg_cur->stateid;
1422 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1423 goto no_delegation_unlock;
1425 nfs_mark_delegation_referenced(deleg_cur);
1426 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1428 no_delegation_unlock:
1429 spin_unlock(&deleg_cur->lock);
1433 if (!ret && open_stateid != NULL) {
1434 __update_open_stateid(state, open_stateid, NULL, fmode);
1437 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1438 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1443 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1444 const nfs4_stateid *stateid)
1446 struct nfs4_state *state = lsp->ls_state;
1449 spin_lock(&state->state_lock);
1450 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1452 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1454 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1457 spin_unlock(&state->state_lock);
1461 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1463 struct nfs_delegation *delegation;
1466 delegation = rcu_dereference(NFS_I(inode)->delegation);
1467 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1472 nfs4_inode_return_delegation(inode);
1475 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1477 struct nfs4_state *state = opendata->state;
1478 struct nfs_inode *nfsi = NFS_I(state->inode);
1479 struct nfs_delegation *delegation;
1480 int open_mode = opendata->o_arg.open_flags;
1481 fmode_t fmode = opendata->o_arg.fmode;
1482 enum open_claim_type4 claim = opendata->o_arg.claim;
1483 nfs4_stateid stateid;
1487 spin_lock(&state->owner->so_lock);
1488 if (can_open_cached(state, fmode, open_mode)) {
1489 update_open_stateflags(state, fmode);
1490 spin_unlock(&state->owner->so_lock);
1491 goto out_return_state;
1493 spin_unlock(&state->owner->so_lock);
1495 delegation = rcu_dereference(nfsi->delegation);
1496 if (!can_open_delegated(delegation, fmode, claim)) {
1500 /* Save the delegation */
1501 nfs4_stateid_copy(&stateid, &delegation->stateid);
1503 nfs_release_seqid(opendata->o_arg.seqid);
1504 if (!opendata->is_recover) {
1505 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1511 /* Try to update the stateid using the delegation */
1512 if (update_open_stateid(state, NULL, &stateid, fmode))
1513 goto out_return_state;
1516 return ERR_PTR(ret);
1518 atomic_inc(&state->count);
1523 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1525 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1526 struct nfs_delegation *delegation;
1527 int delegation_flags = 0;
1530 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1532 delegation_flags = delegation->flags;
1534 switch (data->o_arg.claim) {
1537 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1538 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1539 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1540 "returning a delegation for "
1541 "OPEN(CLAIM_DELEGATE_CUR)\n",
1545 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1546 nfs_inode_set_delegation(state->inode,
1547 data->owner->so_cred,
1550 nfs_inode_reclaim_delegation(state->inode,
1551 data->owner->so_cred,
1556 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1557 * and update the nfs4_state.
1559 static struct nfs4_state *
1560 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1562 struct inode *inode = data->state->inode;
1563 struct nfs4_state *state = data->state;
1566 if (!data->rpc_done) {
1567 if (data->rpc_status) {
1568 ret = data->rpc_status;
1571 /* cached opens have already been processed */
1575 ret = nfs_refresh_inode(inode, &data->f_attr);
1579 if (data->o_res.delegation_type != 0)
1580 nfs4_opendata_check_deleg(data, state);
1582 update_open_stateid(state, &data->o_res.stateid, NULL,
1584 atomic_inc(&state->count);
1588 return ERR_PTR(ret);
1592 static struct nfs4_state *
1593 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1595 struct inode *inode;
1596 struct nfs4_state *state = NULL;
1599 if (!data->rpc_done) {
1600 state = nfs4_try_open_cached(data);
1605 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1607 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1608 ret = PTR_ERR(inode);
1612 state = nfs4_get_open_state(inode, data->owner);
1615 if (data->o_res.delegation_type != 0)
1616 nfs4_opendata_check_deleg(data, state);
1617 update_open_stateid(state, &data->o_res.stateid, NULL,
1621 nfs_release_seqid(data->o_arg.seqid);
1626 return ERR_PTR(ret);
1629 static struct nfs4_state *
1630 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1632 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1633 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1634 return _nfs4_opendata_to_nfs4_state(data);
1637 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1639 struct nfs_inode *nfsi = NFS_I(state->inode);
1640 struct nfs_open_context *ctx;
1642 spin_lock(&state->inode->i_lock);
1643 list_for_each_entry(ctx, &nfsi->open_files, list) {
1644 if (ctx->state != state)
1646 get_nfs_open_context(ctx);
1647 spin_unlock(&state->inode->i_lock);
1650 spin_unlock(&state->inode->i_lock);
1651 return ERR_PTR(-ENOENT);
1654 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1655 struct nfs4_state *state, enum open_claim_type4 claim)
1657 struct nfs4_opendata *opendata;
1659 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1660 NULL, NULL, claim, GFP_NOFS);
1661 if (opendata == NULL)
1662 return ERR_PTR(-ENOMEM);
1663 opendata->state = state;
1664 atomic_inc(&state->count);
1668 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1671 struct nfs4_state *newstate;
1674 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
1676 opendata->o_arg.open_flags = 0;
1677 opendata->o_arg.fmode = fmode;
1678 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1679 NFS_SB(opendata->dentry->d_sb),
1681 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1682 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1683 nfs4_init_opendata_res(opendata);
1684 ret = _nfs4_recover_proc_open(opendata);
1687 newstate = nfs4_opendata_to_nfs4_state(opendata);
1688 if (IS_ERR(newstate))
1689 return PTR_ERR(newstate);
1690 if (newstate != opendata->state)
1692 nfs4_close_state(newstate, fmode);
1696 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1700 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1701 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1702 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1703 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1704 /* memory barrier prior to reading state->n_* */
1705 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1706 clear_bit(NFS_OPEN_STATE, &state->flags);
1708 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1711 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1714 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1718 * We may have performed cached opens for all three recoveries.
1719 * Check if we need to update the current stateid.
1721 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1722 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1723 write_seqlock(&state->seqlock);
1724 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1725 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1726 write_sequnlock(&state->seqlock);
1733 * reclaim state on the server after a reboot.
1735 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1737 struct nfs_delegation *delegation;
1738 struct nfs4_opendata *opendata;
1739 fmode_t delegation_type = 0;
1742 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1743 NFS4_OPEN_CLAIM_PREVIOUS);
1744 if (IS_ERR(opendata))
1745 return PTR_ERR(opendata);
1747 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1748 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1749 delegation_type = delegation->type;
1751 opendata->o_arg.u.delegation_type = delegation_type;
1752 status = nfs4_open_recover(opendata, state);
1753 nfs4_opendata_put(opendata);
1757 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1759 struct nfs_server *server = NFS_SERVER(state->inode);
1760 struct nfs4_exception exception = { };
1763 err = _nfs4_do_open_reclaim(ctx, state);
1764 trace_nfs4_open_reclaim(ctx, 0, err);
1765 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1767 if (err != -NFS4ERR_DELAY)
1769 nfs4_handle_exception(server, err, &exception);
1770 } while (exception.retry);
1774 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1776 struct nfs_open_context *ctx;
1779 ctx = nfs4_state_find_open_context(state);
1782 ret = nfs4_do_open_reclaim(ctx, state);
1783 put_nfs_open_context(ctx);
1787 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1791 printk(KERN_ERR "NFS: %s: unhandled error "
1792 "%d.\n", __func__, err);
1798 case -NFS4ERR_BADSESSION:
1799 case -NFS4ERR_BADSLOT:
1800 case -NFS4ERR_BAD_HIGH_SLOT:
1801 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1802 case -NFS4ERR_DEADSESSION:
1803 set_bit(NFS_DELEGATED_STATE, &state->flags);
1804 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1806 case -NFS4ERR_STALE_CLIENTID:
1807 case -NFS4ERR_STALE_STATEID:
1808 set_bit(NFS_DELEGATED_STATE, &state->flags);
1809 case -NFS4ERR_EXPIRED:
1810 /* Don't recall a delegation if it was lost */
1811 nfs4_schedule_lease_recovery(server->nfs_client);
1813 case -NFS4ERR_MOVED:
1814 nfs4_schedule_migration_recovery(server);
1816 case -NFS4ERR_LEASE_MOVED:
1817 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1819 case -NFS4ERR_DELEG_REVOKED:
1820 case -NFS4ERR_ADMIN_REVOKED:
1821 case -NFS4ERR_BAD_STATEID:
1822 case -NFS4ERR_OPENMODE:
1823 nfs_inode_find_state_and_recover(state->inode,
1825 nfs4_schedule_stateid_recovery(server, state);
1827 case -NFS4ERR_DELAY:
1828 case -NFS4ERR_GRACE:
1829 set_bit(NFS_DELEGATED_STATE, &state->flags);
1833 case -NFS4ERR_DENIED:
1834 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1840 int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1841 struct nfs4_state *state, const nfs4_stateid *stateid,
1844 struct nfs_server *server = NFS_SERVER(state->inode);
1845 struct nfs4_opendata *opendata;
1848 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1849 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1850 if (IS_ERR(opendata))
1851 return PTR_ERR(opendata);
1852 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1853 write_seqlock(&state->seqlock);
1854 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1855 write_sequnlock(&state->seqlock);
1856 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1857 switch (type & (FMODE_READ|FMODE_WRITE)) {
1858 case FMODE_READ|FMODE_WRITE:
1860 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1863 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1867 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1869 nfs4_opendata_put(opendata);
1870 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1873 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1875 struct nfs4_opendata *data = calldata;
1877 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1878 &data->c_arg.seq_args, &data->c_res.seq_res, task);
1881 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1883 struct nfs4_opendata *data = calldata;
1885 nfs40_sequence_done(task, &data->c_res.seq_res);
1887 data->rpc_status = task->tk_status;
1888 if (data->rpc_status == 0) {
1889 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1890 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1891 renew_lease(data->o_res.server, data->timestamp);
1896 static void nfs4_open_confirm_release(void *calldata)
1898 struct nfs4_opendata *data = calldata;
1899 struct nfs4_state *state = NULL;
1901 /* If this request hasn't been cancelled, do nothing */
1902 if (data->cancelled == 0)
1904 /* In case of error, no cleanup! */
1905 if (!data->rpc_done)
1907 state = nfs4_opendata_to_nfs4_state(data);
1909 nfs4_close_state(state, data->o_arg.fmode);
1911 nfs4_opendata_put(data);
1914 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1915 .rpc_call_prepare = nfs4_open_confirm_prepare,
1916 .rpc_call_done = nfs4_open_confirm_done,
1917 .rpc_release = nfs4_open_confirm_release,
1921 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1923 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1925 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
1926 struct rpc_task *task;
1927 struct rpc_message msg = {
1928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1929 .rpc_argp = &data->c_arg,
1930 .rpc_resp = &data->c_res,
1931 .rpc_cred = data->owner->so_cred,
1933 struct rpc_task_setup task_setup_data = {
1934 .rpc_client = server->client,
1935 .rpc_message = &msg,
1936 .callback_ops = &nfs4_open_confirm_ops,
1937 .callback_data = data,
1938 .workqueue = nfsiod_workqueue,
1939 .flags = RPC_TASK_ASYNC,
1943 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
1944 kref_get(&data->kref);
1946 data->rpc_status = 0;
1947 data->timestamp = jiffies;
1948 if (data->is_recover)
1949 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
1950 task = rpc_run_task(&task_setup_data);
1952 return PTR_ERR(task);
1953 status = nfs4_wait_for_completion_rpc_task(task);
1955 data->cancelled = 1;
1958 status = data->rpc_status;
1963 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1965 struct nfs4_opendata *data = calldata;
1966 struct nfs4_state_owner *sp = data->owner;
1967 struct nfs_client *clp = sp->so_server->nfs_client;
1968 enum open_claim_type4 claim = data->o_arg.claim;
1970 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1973 * Check if we still need to send an OPEN call, or if we can use
1974 * a delegation instead.
1976 if (data->state != NULL) {
1977 struct nfs_delegation *delegation;
1979 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1982 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1983 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
1984 goto unlock_no_action;
1987 /* Update client id. */
1988 data->o_arg.clientid = clp->cl_clientid;
1992 case NFS4_OPEN_CLAIM_PREVIOUS:
1993 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1994 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1995 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
1996 case NFS4_OPEN_CLAIM_FH:
1997 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1998 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2000 data->timestamp = jiffies;
2001 if (nfs4_setup_sequence(data->o_arg.server,
2002 &data->o_arg.seq_args,
2003 &data->o_res.seq_res,
2005 nfs_release_seqid(data->o_arg.seqid);
2007 /* Set the create mode (note dependency on the session type) */
2008 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2009 if (data->o_arg.open_flags & O_EXCL) {
2010 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2011 if (nfs4_has_persistent_session(clp))
2012 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2013 else if (clp->cl_mvops->minor_version > 0)
2014 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2020 task->tk_action = NULL;
2022 nfs4_sequence_done(task, &data->o_res.seq_res);
2025 static void nfs4_open_done(struct rpc_task *task, void *calldata)
2027 struct nfs4_opendata *data = calldata;
2029 data->rpc_status = task->tk_status;
2031 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
2034 if (task->tk_status == 0) {
2035 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2036 switch (data->o_res.f_attr->mode & S_IFMT) {
2040 data->rpc_status = -ELOOP;
2043 data->rpc_status = -EISDIR;
2046 data->rpc_status = -ENOTDIR;
2049 renew_lease(data->o_res.server, data->timestamp);
2050 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2051 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2056 static void nfs4_open_release(void *calldata)
2058 struct nfs4_opendata *data = calldata;
2059 struct nfs4_state *state = NULL;
2061 /* If this request hasn't been cancelled, do nothing */
2062 if (data->cancelled == 0)
2064 /* In case of error, no cleanup! */
2065 if (data->rpc_status != 0 || !data->rpc_done)
2067 /* In case we need an open_confirm, no cleanup! */
2068 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2070 state = nfs4_opendata_to_nfs4_state(data);
2072 nfs4_close_state(state, data->o_arg.fmode);
2074 nfs4_opendata_put(data);
2077 static const struct rpc_call_ops nfs4_open_ops = {
2078 .rpc_call_prepare = nfs4_open_prepare,
2079 .rpc_call_done = nfs4_open_done,
2080 .rpc_release = nfs4_open_release,
2083 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
2085 struct inode *dir = d_inode(data->dir);
2086 struct nfs_server *server = NFS_SERVER(dir);
2087 struct nfs_openargs *o_arg = &data->o_arg;
2088 struct nfs_openres *o_res = &data->o_res;
2089 struct rpc_task *task;
2090 struct rpc_message msg = {
2091 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2094 .rpc_cred = data->owner->so_cred,
2096 struct rpc_task_setup task_setup_data = {
2097 .rpc_client = server->client,
2098 .rpc_message = &msg,
2099 .callback_ops = &nfs4_open_ops,
2100 .callback_data = data,
2101 .workqueue = nfsiod_workqueue,
2102 .flags = RPC_TASK_ASYNC,
2106 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
2107 kref_get(&data->kref);
2109 data->rpc_status = 0;
2110 data->cancelled = 0;
2111 data->is_recover = 0;
2113 nfs4_set_sequence_privileged(&o_arg->seq_args);
2114 data->is_recover = 1;
2116 task = rpc_run_task(&task_setup_data);
2118 return PTR_ERR(task);
2119 status = nfs4_wait_for_completion_rpc_task(task);
2121 data->cancelled = 1;
2124 status = data->rpc_status;
2130 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2132 struct inode *dir = d_inode(data->dir);
2133 struct nfs_openres *o_res = &data->o_res;
2136 status = nfs4_run_open_task(data, 1);
2137 if (status != 0 || !data->rpc_done)
2140 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2142 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2143 status = _nfs4_proc_open_confirm(data);
2152 * Additional permission checks in order to distinguish between an
2153 * open for read, and an open for execute. This works around the
2154 * fact that NFSv4 OPEN treats read and execute permissions as being
2156 * Note that in the non-execute case, we want to turn off permission
2157 * checking if we just created a new file (POSIX open() semantics).
2159 static int nfs4_opendata_access(struct rpc_cred *cred,
2160 struct nfs4_opendata *opendata,
2161 struct nfs4_state *state, fmode_t fmode,
2164 struct nfs_access_entry cache;
2167 /* access call failed or for some reason the server doesn't
2168 * support any access modes -- defer access call until later */
2169 if (opendata->o_res.access_supported == 0)
2174 * Use openflags to check for exec, because fmode won't
2175 * always have FMODE_EXEC set when file open for exec.
2177 if (openflags & __FMODE_EXEC) {
2178 /* ONLY check for exec rights */
2180 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2184 cache.jiffies = jiffies;
2185 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2186 nfs_access_add_cache(state->inode, &cache);
2188 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2191 /* even though OPEN succeeded, access is denied. Close the file */
2192 nfs4_close_state(state, fmode);
2197 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2199 static int _nfs4_proc_open(struct nfs4_opendata *data)
2201 struct inode *dir = d_inode(data->dir);
2202 struct nfs_server *server = NFS_SERVER(dir);
2203 struct nfs_openargs *o_arg = &data->o_arg;
2204 struct nfs_openres *o_res = &data->o_res;
2207 status = nfs4_run_open_task(data, 0);
2208 if (!data->rpc_done)
2211 if (status == -NFS4ERR_BADNAME &&
2212 !(o_arg->open_flags & O_CREAT))
2217 nfs_fattr_map_and_free_names(server, &data->f_attr);
2219 if (o_arg->open_flags & O_CREAT) {
2220 update_changeattr(dir, &o_res->cinfo);
2221 if (o_arg->open_flags & O_EXCL)
2222 data->file_created = 1;
2223 else if (o_res->cinfo.before != o_res->cinfo.after)
2224 data->file_created = 1;
2226 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2227 server->caps &= ~NFS_CAP_POSIX_LOCK;
2228 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2229 status = _nfs4_proc_open_confirm(data);
2233 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2234 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2238 static int nfs4_recover_expired_lease(struct nfs_server *server)
2240 return nfs4_client_recover_expired_lease(server->nfs_client);
2245 * reclaim state on the server after a network partition.
2246 * Assumes caller holds the appropriate lock
2248 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2250 struct nfs4_opendata *opendata;
2253 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2254 NFS4_OPEN_CLAIM_FH);
2255 if (IS_ERR(opendata))
2256 return PTR_ERR(opendata);
2257 ret = nfs4_open_recover(opendata, state);
2259 d_drop(ctx->dentry);
2260 nfs4_opendata_put(opendata);
2264 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2266 struct nfs_server *server = NFS_SERVER(state->inode);
2267 struct nfs4_exception exception = { };
2271 err = _nfs4_open_expired(ctx, state);
2272 trace_nfs4_open_expired(ctx, 0, err);
2273 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2278 case -NFS4ERR_GRACE:
2279 case -NFS4ERR_DELAY:
2280 nfs4_handle_exception(server, err, &exception);
2283 } while (exception.retry);
2288 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2290 struct nfs_open_context *ctx;
2293 ctx = nfs4_state_find_open_context(state);
2296 ret = nfs4_do_open_expired(ctx, state);
2297 put_nfs_open_context(ctx);
2301 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2303 nfs_remove_bad_delegation(state->inode);
2304 write_seqlock(&state->seqlock);
2305 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2306 write_sequnlock(&state->seqlock);
2307 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2310 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2312 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2313 nfs_finish_clear_delegation_stateid(state);
2316 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2318 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2319 nfs40_clear_delegation_stateid(state);
2320 return nfs4_open_expired(sp, state);
2323 #if defined(CONFIG_NFS_V4_1)
2324 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2326 struct nfs_server *server = NFS_SERVER(state->inode);
2327 nfs4_stateid stateid;
2328 struct nfs_delegation *delegation;
2329 struct rpc_cred *cred;
2332 /* Get the delegation credential for use by test/free_stateid */
2334 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2335 if (delegation == NULL) {
2340 nfs4_stateid_copy(&stateid, &delegation->stateid);
2341 cred = get_rpccred(delegation->cred);
2343 status = nfs41_test_stateid(server, &stateid, cred);
2344 trace_nfs4_test_delegation_stateid(state, NULL, status);
2346 if (status != NFS_OK) {
2347 /* Free the stateid unless the server explicitly
2348 * informs us the stateid is unrecognized. */
2349 if (status != -NFS4ERR_BAD_STATEID)
2350 nfs41_free_stateid(server, &stateid, cred);
2351 nfs_finish_clear_delegation_stateid(state);
2358 * nfs41_check_open_stateid - possibly free an open stateid
2360 * @state: NFSv4 state for an inode
2362 * Returns NFS_OK if recovery for this stateid is now finished.
2363 * Otherwise a negative NFS4ERR value is returned.
2365 static int nfs41_check_open_stateid(struct nfs4_state *state)
2367 struct nfs_server *server = NFS_SERVER(state->inode);
2368 nfs4_stateid *stateid = &state->open_stateid;
2369 struct rpc_cred *cred = state->owner->so_cred;
2372 /* If a state reset has been done, test_stateid is unneeded */
2373 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2374 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2375 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2376 return -NFS4ERR_BAD_STATEID;
2378 status = nfs41_test_stateid(server, stateid, cred);
2379 trace_nfs4_test_open_stateid(state, NULL, status);
2380 if (status != NFS_OK) {
2381 /* Free the stateid unless the server explicitly
2382 * informs us the stateid is unrecognized. */
2383 if (status != -NFS4ERR_BAD_STATEID)
2384 nfs41_free_stateid(server, stateid, cred);
2386 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2387 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2388 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2389 clear_bit(NFS_OPEN_STATE, &state->flags);
2394 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2398 nfs41_check_delegation_stateid(state);
2399 status = nfs41_check_open_stateid(state);
2400 if (status != NFS_OK)
2401 status = nfs4_open_expired(sp, state);
2407 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2408 * fields corresponding to attributes that were used to store the verifier.
2409 * Make sure we clobber those fields in the later setattr call
2411 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2412 struct iattr *sattr, struct nfs4_label **label)
2414 const u32 *attrset = opendata->o_res.attrset;
2416 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2417 !(sattr->ia_valid & ATTR_ATIME_SET))
2418 sattr->ia_valid |= ATTR_ATIME;
2420 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2421 !(sattr->ia_valid & ATTR_MTIME_SET))
2422 sattr->ia_valid |= ATTR_MTIME;
2424 /* Except MODE, it seems harmless of setting twice. */
2425 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
2426 attrset[1] & FATTR4_WORD1_MODE)
2427 sattr->ia_valid &= ~ATTR_MODE;
2429 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2433 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2436 struct nfs_open_context *ctx)
2438 struct nfs4_state_owner *sp = opendata->owner;
2439 struct nfs_server *server = sp->so_server;
2440 struct dentry *dentry;
2441 struct nfs4_state *state;
2445 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2447 ret = _nfs4_proc_open(opendata);
2451 state = nfs4_opendata_to_nfs4_state(opendata);
2452 ret = PTR_ERR(state);
2456 if (server->caps & NFS_CAP_POSIX_LOCK)
2457 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2459 dentry = opendata->dentry;
2460 if (d_really_is_negative(dentry)) {
2461 /* FIXME: Is this d_drop() ever needed? */
2463 dentry = d_add_unique(dentry, igrab(state->inode));
2464 if (dentry == NULL) {
2465 dentry = opendata->dentry;
2468 ctx->dentry = dentry;
2470 nfs_set_verifier(dentry,
2471 nfs_save_change_attribute(d_inode(opendata->dir)));
2474 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2478 if (d_inode(dentry) == state->inode) {
2479 nfs_inode_attach_open_context(ctx);
2480 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2481 nfs4_schedule_stateid_recovery(server, state);
2488 * Returns a referenced nfs4_state
2490 static int _nfs4_do_open(struct inode *dir,
2491 struct nfs_open_context *ctx,
2493 struct iattr *sattr,
2494 struct nfs4_label *label,
2497 struct nfs4_state_owner *sp;
2498 struct nfs4_state *state = NULL;
2499 struct nfs_server *server = NFS_SERVER(dir);
2500 struct nfs4_opendata *opendata;
2501 struct dentry *dentry = ctx->dentry;
2502 struct rpc_cred *cred = ctx->cred;
2503 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2504 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2505 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2506 struct nfs4_label *olabel = NULL;
2509 /* Protect against reboot recovery conflicts */
2511 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2513 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2516 status = nfs4_recover_expired_lease(server);
2518 goto err_put_state_owner;
2519 if (d_really_is_positive(dentry))
2520 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2522 if (d_really_is_positive(dentry))
2523 claim = NFS4_OPEN_CLAIM_FH;
2524 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2525 label, claim, GFP_KERNEL);
2526 if (opendata == NULL)
2527 goto err_put_state_owner;
2530 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2531 if (IS_ERR(olabel)) {
2532 status = PTR_ERR(olabel);
2533 goto err_opendata_put;
2537 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2538 if (!opendata->f_attr.mdsthreshold) {
2539 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2540 if (!opendata->f_attr.mdsthreshold)
2541 goto err_free_label;
2543 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2545 if (d_really_is_positive(dentry))
2546 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2548 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2550 goto err_free_label;
2553 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
2554 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2555 nfs4_exclusive_attrset(opendata, sattr, &label);
2557 nfs_fattr_init(opendata->o_res.f_attr);
2558 status = nfs4_do_setattr(state->inode, cred,
2559 opendata->o_res.f_attr, sattr,
2560 state, label, olabel);
2562 nfs_setattr_update_inode(state->inode, sattr,
2563 opendata->o_res.f_attr);
2564 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2567 if (opened && opendata->file_created)
2568 *opened |= FILE_CREATED;
2570 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2571 *ctx_th = opendata->f_attr.mdsthreshold;
2572 opendata->f_attr.mdsthreshold = NULL;
2575 nfs4_label_free(olabel);
2577 nfs4_opendata_put(opendata);
2578 nfs4_put_state_owner(sp);
2581 nfs4_label_free(olabel);
2583 nfs4_opendata_put(opendata);
2584 err_put_state_owner:
2585 nfs4_put_state_owner(sp);
2591 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2592 struct nfs_open_context *ctx,
2594 struct iattr *sattr,
2595 struct nfs4_label *label,
2598 struct nfs_server *server = NFS_SERVER(dir);
2599 struct nfs4_exception exception = { };
2600 struct nfs4_state *res;
2604 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2606 trace_nfs4_open_file(ctx, flags, status);
2609 /* NOTE: BAD_SEQID means the server and client disagree about the
2610 * book-keeping w.r.t. state-changing operations
2611 * (OPEN/CLOSE/LOCK/LOCKU...)
2612 * It is actually a sign of a bug on the client or on the server.
2614 * If we receive a BAD_SEQID error in the particular case of
2615 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2616 * have unhashed the old state_owner for us, and that we can
2617 * therefore safely retry using a new one. We should still warn
2618 * the user though...
2620 if (status == -NFS4ERR_BAD_SEQID) {
2621 pr_warn_ratelimited("NFS: v4 server %s "
2622 " returned a bad sequence-id error!\n",
2623 NFS_SERVER(dir)->nfs_client->cl_hostname);
2624 exception.retry = 1;
2628 * BAD_STATEID on OPEN means that the server cancelled our
2629 * state before it received the OPEN_CONFIRM.
2630 * Recover by retrying the request as per the discussion
2631 * on Page 181 of RFC3530.
2633 if (status == -NFS4ERR_BAD_STATEID) {
2634 exception.retry = 1;
2637 if (status == -EAGAIN) {
2638 /* We must have found a delegation */
2639 exception.retry = 1;
2642 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2644 res = ERR_PTR(nfs4_handle_exception(server,
2645 status, &exception));
2646 } while (exception.retry);
2650 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2651 struct nfs_fattr *fattr, struct iattr *sattr,
2652 struct nfs4_state *state, struct nfs4_label *ilabel,
2653 struct nfs4_label *olabel)
2655 struct nfs_server *server = NFS_SERVER(inode);
2656 struct nfs_setattrargs arg = {
2657 .fh = NFS_FH(inode),
2660 .bitmask = server->attr_bitmask,
2663 struct nfs_setattrres res = {
2668 struct rpc_message msg = {
2669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2674 unsigned long timestamp = jiffies;
2679 arg.bitmask = nfs4_bitmask(server, ilabel);
2681 arg.bitmask = nfs4_bitmask(server, olabel);
2683 nfs_fattr_init(fattr);
2685 /* Servers should only apply open mode checks for file size changes */
2686 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2687 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2689 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2690 /* Use that stateid */
2691 } else if (truncate && state != NULL) {
2692 struct nfs_lockowner lockowner = {
2693 .l_owner = current->files,
2694 .l_pid = current->tgid,
2696 if (!nfs4_valid_open_stateid(state))
2698 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2699 &lockowner) == -EIO)
2702 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2704 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2705 if (status == 0 && state != NULL)
2706 renew_lease(server, timestamp);
2710 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2711 struct nfs_fattr *fattr, struct iattr *sattr,
2712 struct nfs4_state *state, struct nfs4_label *ilabel,
2713 struct nfs4_label *olabel)
2715 struct nfs_server *server = NFS_SERVER(inode);
2716 struct nfs4_exception exception = {
2722 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
2723 trace_nfs4_setattr(inode, err);
2725 case -NFS4ERR_OPENMODE:
2726 if (!(sattr->ia_valid & ATTR_SIZE)) {
2727 pr_warn_once("NFSv4: server %s is incorrectly "
2728 "applying open mode checks to "
2729 "a SETATTR that is not "
2730 "changing file size.\n",
2731 server->nfs_client->cl_hostname);
2733 if (state && !(state->state & FMODE_WRITE)) {
2735 if (sattr->ia_valid & ATTR_OPEN)
2740 err = nfs4_handle_exception(server, err, &exception);
2741 } while (exception.retry);
2747 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2749 if (inode == NULL || !nfs_have_layout(inode))
2752 return pnfs_wait_on_layoutreturn(inode, task);
2755 struct nfs4_closedata {
2756 struct inode *inode;
2757 struct nfs4_state *state;
2758 struct nfs_closeargs arg;
2759 struct nfs_closeres res;
2760 struct nfs_fattr fattr;
2761 unsigned long timestamp;
2766 static void nfs4_free_closedata(void *data)
2768 struct nfs4_closedata *calldata = data;
2769 struct nfs4_state_owner *sp = calldata->state->owner;
2770 struct super_block *sb = calldata->state->inode->i_sb;
2773 pnfs_roc_release(calldata->state->inode);
2774 nfs4_put_open_state(calldata->state);
2775 nfs_free_seqid(calldata->arg.seqid);
2776 nfs4_put_state_owner(sp);
2777 nfs_sb_deactive(sb);
2781 static void nfs4_close_done(struct rpc_task *task, void *data)
2783 struct nfs4_closedata *calldata = data;
2784 struct nfs4_state *state = calldata->state;
2785 struct nfs_server *server = NFS_SERVER(calldata->inode);
2786 nfs4_stateid *res_stateid = NULL;
2788 dprintk("%s: begin!\n", __func__);
2789 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2791 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2792 /* hmm. we are done with the inode, and in the process of freeing
2793 * the state_owner. we keep this around to process errors
2795 switch (task->tk_status) {
2797 res_stateid = &calldata->res.stateid;
2799 pnfs_roc_set_barrier(state->inode,
2800 calldata->roc_barrier);
2801 renew_lease(server, calldata->timestamp);
2803 case -NFS4ERR_ADMIN_REVOKED:
2804 case -NFS4ERR_STALE_STATEID:
2805 case -NFS4ERR_OLD_STATEID:
2806 case -NFS4ERR_BAD_STATEID:
2807 case -NFS4ERR_EXPIRED:
2808 if (!nfs4_stateid_match(&calldata->arg.stateid,
2809 &state->open_stateid)) {
2810 rpc_restart_call_prepare(task);
2813 if (calldata->arg.fmode == 0)
2816 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
2817 rpc_restart_call_prepare(task);
2821 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2822 res_stateid, calldata->arg.fmode);
2824 nfs_release_seqid(calldata->arg.seqid);
2825 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2826 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2829 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2831 struct nfs4_closedata *calldata = data;
2832 struct nfs4_state *state = calldata->state;
2833 struct inode *inode = calldata->inode;
2834 bool is_rdonly, is_wronly, is_rdwr;
2837 dprintk("%s: begin!\n", __func__);
2838 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2841 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2842 spin_lock(&state->owner->so_lock);
2843 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2844 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2845 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2846 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
2847 /* Calculate the change in open mode */
2848 calldata->arg.fmode = 0;
2849 if (state->n_rdwr == 0) {
2850 if (state->n_rdonly == 0)
2851 call_close |= is_rdonly;
2853 calldata->arg.fmode |= FMODE_READ;
2854 if (state->n_wronly == 0)
2855 call_close |= is_wronly;
2857 calldata->arg.fmode |= FMODE_WRITE;
2858 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
2859 call_close |= is_rdwr;
2861 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2863 if (!nfs4_valid_open_stateid(state))
2865 spin_unlock(&state->owner->so_lock);
2868 /* Note: exit _without_ calling nfs4_close_done */
2872 if (nfs4_wait_on_layoutreturn(inode, task)) {
2873 nfs_release_seqid(calldata->arg.seqid);
2877 if (calldata->arg.fmode == 0)
2878 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2880 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2882 calldata->arg.share_access =
2883 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2884 calldata->arg.fmode, 0);
2886 nfs_fattr_init(calldata->res.fattr);
2887 calldata->timestamp = jiffies;
2888 if (nfs4_setup_sequence(NFS_SERVER(inode),
2889 &calldata->arg.seq_args,
2890 &calldata->res.seq_res,
2892 nfs_release_seqid(calldata->arg.seqid);
2893 dprintk("%s: done!\n", __func__);
2896 task->tk_action = NULL;
2898 nfs4_sequence_done(task, &calldata->res.seq_res);
2901 static const struct rpc_call_ops nfs4_close_ops = {
2902 .rpc_call_prepare = nfs4_close_prepare,
2903 .rpc_call_done = nfs4_close_done,
2904 .rpc_release = nfs4_free_closedata,
2907 static bool nfs4_roc(struct inode *inode)
2909 if (!nfs_have_layout(inode))
2911 return pnfs_roc(inode);
2915 * It is possible for data to be read/written from a mem-mapped file
2916 * after the sys_close call (which hits the vfs layer as a flush).
2917 * This means that we can't safely call nfsv4 close on a file until
2918 * the inode is cleared. This in turn means that we are not good
2919 * NFSv4 citizens - we do not indicate to the server to update the file's
2920 * share state even when we are done with one of the three share
2921 * stateid's in the inode.
2923 * NOTE: Caller must be holding the sp->so_owner semaphore!
2925 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
2927 struct nfs_server *server = NFS_SERVER(state->inode);
2928 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
2929 struct nfs4_closedata *calldata;
2930 struct nfs4_state_owner *sp = state->owner;
2931 struct rpc_task *task;
2932 struct rpc_message msg = {
2933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2934 .rpc_cred = state->owner->so_cred,
2936 struct rpc_task_setup task_setup_data = {
2937 .rpc_client = server->client,
2938 .rpc_message = &msg,
2939 .callback_ops = &nfs4_close_ops,
2940 .workqueue = nfsiod_workqueue,
2941 .flags = RPC_TASK_ASYNC,
2943 int status = -ENOMEM;
2945 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2946 &task_setup_data.rpc_client, &msg);
2948 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2949 if (calldata == NULL)
2951 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2952 calldata->inode = state->inode;
2953 calldata->state = state;
2954 calldata->arg.fh = NFS_FH(state->inode);
2955 /* Serialization for the sequence id */
2956 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2957 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
2958 if (IS_ERR(calldata->arg.seqid))
2959 goto out_free_calldata;
2960 calldata->arg.fmode = 0;
2961 calldata->arg.bitmask = server->cache_consistency_bitmask;
2962 calldata->res.fattr = &calldata->fattr;
2963 calldata->res.seqid = calldata->arg.seqid;
2964 calldata->res.server = server;
2965 calldata->roc = nfs4_roc(state->inode);
2966 nfs_sb_active(calldata->inode->i_sb);
2968 msg.rpc_argp = &calldata->arg;
2969 msg.rpc_resp = &calldata->res;
2970 task_setup_data.callback_data = calldata;
2971 task = rpc_run_task(&task_setup_data);
2973 return PTR_ERR(task);
2976 status = rpc_wait_for_completion_task(task);
2982 nfs4_put_open_state(state);
2983 nfs4_put_state_owner(sp);
2987 static struct inode *
2988 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2989 int open_flags, struct iattr *attr, int *opened)
2991 struct nfs4_state *state;
2992 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2994 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
2996 /* Protect against concurrent sillydeletes */
2997 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
2999 nfs4_label_release_security(label);
3002 return ERR_CAST(state);
3003 return state->inode;
3006 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3008 if (ctx->state == NULL)
3011 nfs4_close_sync(ctx->state, ctx->mode);
3013 nfs4_close_state(ctx->state, ctx->mode);
3016 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3017 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3018 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
3020 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3022 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3023 struct nfs4_server_caps_arg args = {
3027 struct nfs4_server_caps_res res = {};
3028 struct rpc_message msg = {
3029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3035 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3036 FATTR4_WORD0_FH_EXPIRE_TYPE |
3037 FATTR4_WORD0_LINK_SUPPORT |
3038 FATTR4_WORD0_SYMLINK_SUPPORT |
3039 FATTR4_WORD0_ACLSUPPORT;
3041 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3043 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3045 /* Sanity check the server answers */
3046 switch (minorversion) {
3048 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3049 res.attr_bitmask[2] = 0;
3052 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3055 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3057 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3058 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3059 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3060 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3061 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3062 NFS_CAP_CTIME|NFS_CAP_MTIME|
3063 NFS_CAP_SECURITY_LABEL);
3064 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3065 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3066 server->caps |= NFS_CAP_ACLS;
3067 if (res.has_links != 0)
3068 server->caps |= NFS_CAP_HARDLINKS;
3069 if (res.has_symlinks != 0)
3070 server->caps |= NFS_CAP_SYMLINKS;
3071 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3072 server->caps |= NFS_CAP_FILEID;
3073 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3074 server->caps |= NFS_CAP_MODE;
3075 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3076 server->caps |= NFS_CAP_NLINK;
3077 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3078 server->caps |= NFS_CAP_OWNER;
3079 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3080 server->caps |= NFS_CAP_OWNER_GROUP;
3081 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3082 server->caps |= NFS_CAP_ATIME;
3083 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3084 server->caps |= NFS_CAP_CTIME;
3085 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3086 server->caps |= NFS_CAP_MTIME;
3087 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
3088 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3089 server->caps |= NFS_CAP_SECURITY_LABEL;
3091 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3092 sizeof(server->attr_bitmask));
3093 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3095 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3096 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3097 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3098 server->cache_consistency_bitmask[2] = 0;
3099 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3100 sizeof(server->exclcreat_bitmask));
3101 server->acl_bitmask = res.acl_bitmask;
3102 server->fh_expire_type = res.fh_expire_type;
3108 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3110 struct nfs4_exception exception = { };
3113 err = nfs4_handle_exception(server,
3114 _nfs4_server_capabilities(server, fhandle),
3116 } while (exception.retry);
3120 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3121 struct nfs_fsinfo *info)
3124 struct nfs4_lookup_root_arg args = {
3127 struct nfs4_lookup_res res = {
3129 .fattr = info->fattr,
3132 struct rpc_message msg = {
3133 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3138 bitmask[0] = nfs4_fattr_bitmap[0];
3139 bitmask[1] = nfs4_fattr_bitmap[1];
3141 * Process the label in the upcoming getfattr
3143 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3145 nfs_fattr_init(info->fattr);
3146 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3149 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3150 struct nfs_fsinfo *info)
3152 struct nfs4_exception exception = { };
3155 err = _nfs4_lookup_root(server, fhandle, info);
3156 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3159 case -NFS4ERR_WRONGSEC:
3162 err = nfs4_handle_exception(server, err, &exception);
3164 } while (exception.retry);
3169 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3170 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3172 struct rpc_auth_create_args auth_args = {
3173 .pseudoflavor = flavor,
3175 struct rpc_auth *auth;
3178 auth = rpcauth_create(&auth_args, server->client);
3183 ret = nfs4_lookup_root(server, fhandle, info);
3189 * Retry pseudoroot lookup with various security flavors. We do this when:
3191 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3192 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3194 * Returns zero on success, or a negative NFS4ERR value, or a
3195 * negative errno value.
3197 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3198 struct nfs_fsinfo *info)
3200 /* Per 3530bis 15.33.5 */
3201 static const rpc_authflavor_t flav_array[] = {
3205 RPC_AUTH_UNIX, /* courtesy */
3208 int status = -EPERM;
3211 if (server->auth_info.flavor_len > 0) {
3212 /* try each flavor specified by user */
3213 for (i = 0; i < server->auth_info.flavor_len; i++) {
3214 status = nfs4_lookup_root_sec(server, fhandle, info,
3215 server->auth_info.flavors[i]);
3216 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3221 /* no flavors specified by user, try default list */
3222 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3223 status = nfs4_lookup_root_sec(server, fhandle, info,
3225 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3232 * -EACCESS could mean that the user doesn't have correct permissions
3233 * to access the mount. It could also mean that we tried to mount
3234 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3235 * existing mount programs don't handle -EACCES very well so it should
3236 * be mapped to -EPERM instead.
3238 if (status == -EACCES)
3243 static int nfs4_do_find_root_sec(struct nfs_server *server,
3244 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3246 int mv = server->nfs_client->cl_minorversion;
3247 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3251 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3252 * @server: initialized nfs_server handle
3253 * @fhandle: we fill in the pseudo-fs root file handle
3254 * @info: we fill in an FSINFO struct
3255 * @auth_probe: probe the auth flavours
3257 * Returns zero on success, or a negative errno.
3259 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3260 struct nfs_fsinfo *info,
3266 status = nfs4_lookup_root(server, fhandle, info);
3268 if (auth_probe || status == NFS4ERR_WRONGSEC)
3269 status = nfs4_do_find_root_sec(server, fhandle, info);
3272 status = nfs4_server_capabilities(server, fhandle);
3274 status = nfs4_do_fsinfo(server, fhandle, info);
3276 return nfs4_map_errors(status);
3279 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3280 struct nfs_fsinfo *info)
3283 struct nfs_fattr *fattr = info->fattr;
3284 struct nfs4_label *label = NULL;
3286 error = nfs4_server_capabilities(server, mntfh);
3288 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3292 label = nfs4_label_alloc(server, GFP_KERNEL);
3294 return PTR_ERR(label);
3296 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3298 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3299 goto err_free_label;
3302 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3303 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3304 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3307 nfs4_label_free(label);
3313 * Get locations and (maybe) other attributes of a referral.
3314 * Note that we'll actually follow the referral later when
3315 * we detect fsid mismatch in inode revalidation
3317 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3318 const struct qstr *name, struct nfs_fattr *fattr,
3319 struct nfs_fh *fhandle)
3321 int status = -ENOMEM;
3322 struct page *page = NULL;
3323 struct nfs4_fs_locations *locations = NULL;
3325 page = alloc_page(GFP_KERNEL);
3328 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3329 if (locations == NULL)
3332 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3337 * If the fsid didn't change, this is a migration event, not a
3338 * referral. Cause us to drop into the exception handler, which
3339 * will kick off migration recovery.
3341 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3342 dprintk("%s: server did not return a different fsid for"
3343 " a referral at %s\n", __func__, name->name);
3344 status = -NFS4ERR_MOVED;
3347 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3348 nfs_fixup_referral_attributes(&locations->fattr);
3350 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3351 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3352 memset(fhandle, 0, sizeof(struct nfs_fh));
3360 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3361 struct nfs_fattr *fattr, struct nfs4_label *label)
3363 struct nfs4_getattr_arg args = {
3365 .bitmask = server->attr_bitmask,
3367 struct nfs4_getattr_res res = {
3372 struct rpc_message msg = {
3373 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3378 args.bitmask = nfs4_bitmask(server, label);
3380 nfs_fattr_init(fattr);
3381 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3384 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3385 struct nfs_fattr *fattr, struct nfs4_label *label)
3387 struct nfs4_exception exception = { };
3390 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3391 trace_nfs4_getattr(server, fhandle, fattr, err);
3392 err = nfs4_handle_exception(server, err,
3394 } while (exception.retry);
3399 * The file is not closed if it is opened due to the a request to change
3400 * the size of the file. The open call will not be needed once the
3401 * VFS layer lookup-intents are implemented.
3403 * Close is called when the inode is destroyed.
3404 * If we haven't opened the file for O_WRONLY, we
3405 * need to in the size_change case to obtain a stateid.
3408 * Because OPEN is always done by name in nfsv4, it is
3409 * possible that we opened a different file by the same
3410 * name. We can recognize this race condition, but we
3411 * can't do anything about it besides returning an error.
3413 * This will be fixed with VFS changes (lookup-intent).
3416 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3417 struct iattr *sattr)
3419 struct inode *inode = d_inode(dentry);
3420 struct rpc_cred *cred = NULL;
3421 struct nfs4_state *state = NULL;
3422 struct nfs4_label *label = NULL;
3425 if (pnfs_ld_layoutret_on_setattr(inode) &&
3426 sattr->ia_valid & ATTR_SIZE &&
3427 sattr->ia_size < i_size_read(inode))
3428 pnfs_commit_and_return_layout(inode);
3430 nfs_fattr_init(fattr);
3432 /* Deal with open(O_TRUNC) */
3433 if (sattr->ia_valid & ATTR_OPEN)
3434 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3436 /* Optimization: if the end result is no change, don't RPC */
3437 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3440 /* Search for an existing open(O_WRITE) file */
3441 if (sattr->ia_valid & ATTR_FILE) {
3442 struct nfs_open_context *ctx;
3444 ctx = nfs_file_open_context(sattr->ia_file);
3451 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3453 return PTR_ERR(label);
3455 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
3457 nfs_setattr_update_inode(inode, sattr, fattr);
3458 nfs_setsecurity(inode, fattr, label);
3460 nfs4_label_free(label);
3464 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3465 const struct qstr *name, struct nfs_fh *fhandle,
3466 struct nfs_fattr *fattr, struct nfs4_label *label)
3468 struct nfs_server *server = NFS_SERVER(dir);
3470 struct nfs4_lookup_arg args = {
3471 .bitmask = server->attr_bitmask,
3472 .dir_fh = NFS_FH(dir),
3475 struct nfs4_lookup_res res = {
3481 struct rpc_message msg = {
3482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3487 args.bitmask = nfs4_bitmask(server, label);
3489 nfs_fattr_init(fattr);
3491 dprintk("NFS call lookup %s\n", name->name);
3492 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3493 dprintk("NFS reply lookup: %d\n", status);
3497 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3499 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3500 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3501 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3505 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3506 struct qstr *name, struct nfs_fh *fhandle,
3507 struct nfs_fattr *fattr, struct nfs4_label *label)
3509 struct nfs4_exception exception = { };
3510 struct rpc_clnt *client = *clnt;
3513 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3514 trace_nfs4_lookup(dir, name, err);
3516 case -NFS4ERR_BADNAME:
3519 case -NFS4ERR_MOVED:
3520 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3521 if (err == -NFS4ERR_MOVED)
3522 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3524 case -NFS4ERR_WRONGSEC:
3526 if (client != *clnt)
3528 client = nfs4_negotiate_security(client, dir, name);
3530 return PTR_ERR(client);
3532 exception.retry = 1;
3535 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3537 } while (exception.retry);
3542 else if (client != *clnt)
3543 rpc_shutdown_client(client);
3548 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
3549 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3550 struct nfs4_label *label)
3553 struct rpc_clnt *client = NFS_CLIENT(dir);
3555 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3556 if (client != NFS_CLIENT(dir)) {
3557 rpc_shutdown_client(client);
3558 nfs_fixup_secinfo_attributes(fattr);
3564 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3565 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3567 struct rpc_clnt *client = NFS_CLIENT(dir);
3570 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3572 return ERR_PTR(status);
3573 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3576 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3578 struct nfs_server *server = NFS_SERVER(inode);
3579 struct nfs4_accessargs args = {
3580 .fh = NFS_FH(inode),
3581 .bitmask = server->cache_consistency_bitmask,
3583 struct nfs4_accessres res = {
3586 struct rpc_message msg = {
3587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3590 .rpc_cred = entry->cred,
3592 int mode = entry->mask;
3596 * Determine which access bits we want to ask for...
3598 if (mode & MAY_READ)
3599 args.access |= NFS4_ACCESS_READ;
3600 if (S_ISDIR(inode->i_mode)) {
3601 if (mode & MAY_WRITE)
3602 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3603 if (mode & MAY_EXEC)
3604 args.access |= NFS4_ACCESS_LOOKUP;
3606 if (mode & MAY_WRITE)
3607 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3608 if (mode & MAY_EXEC)
3609 args.access |= NFS4_ACCESS_EXECUTE;
3612 res.fattr = nfs_alloc_fattr();
3613 if (res.fattr == NULL)
3616 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3618 nfs_access_set_mask(entry, res.access);
3619 nfs_refresh_inode(inode, res.fattr);
3621 nfs_free_fattr(res.fattr);
3625 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3627 struct nfs4_exception exception = { };
3630 err = _nfs4_proc_access(inode, entry);
3631 trace_nfs4_access(inode, err);
3632 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3634 } while (exception.retry);
3639 * TODO: For the time being, we don't try to get any attributes
3640 * along with any of the zero-copy operations READ, READDIR,
3643 * In the case of the first three, we want to put the GETATTR
3644 * after the read-type operation -- this is because it is hard
3645 * to predict the length of a GETATTR response in v4, and thus
3646 * align the READ data correctly. This means that the GETATTR
3647 * may end up partially falling into the page cache, and we should
3648 * shift it into the 'tail' of the xdr_buf before processing.
3649 * To do this efficiently, we need to know the total length
3650 * of data received, which doesn't seem to be available outside
3653 * In the case of WRITE, we also want to put the GETATTR after
3654 * the operation -- in this case because we want to make sure
3655 * we get the post-operation mtime and size.
3657 * Both of these changes to the XDR layer would in fact be quite
3658 * minor, but I decided to leave them for a subsequent patch.
3660 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3661 unsigned int pgbase, unsigned int pglen)
3663 struct nfs4_readlink args = {
3664 .fh = NFS_FH(inode),
3669 struct nfs4_readlink_res res;
3670 struct rpc_message msg = {
3671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3676 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3679 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3680 unsigned int pgbase, unsigned int pglen)
3682 struct nfs4_exception exception = { };
3685 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3686 trace_nfs4_readlink(inode, err);
3687 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3689 } while (exception.retry);
3694 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3697 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3700 struct nfs4_label l, *ilabel = NULL;
3701 struct nfs_open_context *ctx;
3702 struct nfs4_state *state;
3705 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3707 return PTR_ERR(ctx);
3709 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3711 sattr->ia_mode &= ~current_umask();
3712 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
3713 if (IS_ERR(state)) {
3714 status = PTR_ERR(state);
3718 nfs4_label_release_security(ilabel);
3719 put_nfs_open_context(ctx);
3723 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3725 struct nfs_server *server = NFS_SERVER(dir);
3726 struct nfs_removeargs args = {
3730 struct nfs_removeres res = {
3733 struct rpc_message msg = {
3734 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3740 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3742 update_changeattr(dir, &res.cinfo);
3746 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3748 struct nfs4_exception exception = { };
3751 err = _nfs4_proc_remove(dir, name);
3752 trace_nfs4_remove(dir, name, err);
3753 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3755 } while (exception.retry);
3759 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3761 struct nfs_server *server = NFS_SERVER(dir);
3762 struct nfs_removeargs *args = msg->rpc_argp;
3763 struct nfs_removeres *res = msg->rpc_resp;
3765 res->server = server;
3766 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3767 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3769 nfs_fattr_init(res->dir_attr);
3772 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3774 nfs4_setup_sequence(NFS_SERVER(data->dir),
3775 &data->args.seq_args,
3780 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
3782 struct nfs_unlinkdata *data = task->tk_calldata;
3783 struct nfs_removeres *res = &data->res;
3785 if (!nfs4_sequence_done(task, &res->seq_res))
3787 if (nfs4_async_handle_error(task, res->server, NULL,
3788 &data->timeout) == -EAGAIN)
3790 update_changeattr(dir, &res->cinfo);
3794 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3796 struct nfs_server *server = NFS_SERVER(dir);
3797 struct nfs_renameargs *arg = msg->rpc_argp;
3798 struct nfs_renameres *res = msg->rpc_resp;
3800 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
3801 res->server = server;
3802 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
3805 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3807 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3808 &data->args.seq_args,
3813 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3814 struct inode *new_dir)
3816 struct nfs_renamedata *data = task->tk_calldata;
3817 struct nfs_renameres *res = &data->res;
3819 if (!nfs4_sequence_done(task, &res->seq_res))
3821 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
3824 update_changeattr(old_dir, &res->old_cinfo);
3825 update_changeattr(new_dir, &res->new_cinfo);
3829 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3831 struct nfs_server *server = NFS_SERVER(inode);
3832 struct nfs4_link_arg arg = {
3833 .fh = NFS_FH(inode),
3834 .dir_fh = NFS_FH(dir),
3836 .bitmask = server->attr_bitmask,
3838 struct nfs4_link_res res = {
3842 struct rpc_message msg = {
3843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3847 int status = -ENOMEM;
3849 res.fattr = nfs_alloc_fattr();
3850 if (res.fattr == NULL)
3853 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3854 if (IS_ERR(res.label)) {
3855 status = PTR_ERR(res.label);
3858 arg.bitmask = nfs4_bitmask(server, res.label);
3860 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3862 update_changeattr(dir, &res.cinfo);
3863 status = nfs_post_op_update_inode(inode, res.fattr);
3865 nfs_setsecurity(inode, res.fattr, res.label);
3869 nfs4_label_free(res.label);
3872 nfs_free_fattr(res.fattr);
3876 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3878 struct nfs4_exception exception = { };
3881 err = nfs4_handle_exception(NFS_SERVER(inode),
3882 _nfs4_proc_link(inode, dir, name),
3884 } while (exception.retry);
3888 struct nfs4_createdata {
3889 struct rpc_message msg;
3890 struct nfs4_create_arg arg;
3891 struct nfs4_create_res res;
3893 struct nfs_fattr fattr;
3894 struct nfs4_label *label;
3897 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3898 struct qstr *name, struct iattr *sattr, u32 ftype)
3900 struct nfs4_createdata *data;
3902 data = kzalloc(sizeof(*data), GFP_KERNEL);
3904 struct nfs_server *server = NFS_SERVER(dir);
3906 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3907 if (IS_ERR(data->label))
3910 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3911 data->msg.rpc_argp = &data->arg;
3912 data->msg.rpc_resp = &data->res;
3913 data->arg.dir_fh = NFS_FH(dir);
3914 data->arg.server = server;
3915 data->arg.name = name;
3916 data->arg.attrs = sattr;
3917 data->arg.ftype = ftype;
3918 data->arg.bitmask = nfs4_bitmask(server, data->label);
3919 data->res.server = server;
3920 data->res.fh = &data->fh;
3921 data->res.fattr = &data->fattr;
3922 data->res.label = data->label;
3923 nfs_fattr_init(data->res.fattr);
3931 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3933 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3934 &data->arg.seq_args, &data->res.seq_res, 1);
3936 update_changeattr(dir, &data->res.dir_cinfo);
3937 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
3942 static void nfs4_free_createdata(struct nfs4_createdata *data)
3944 nfs4_label_free(data->label);
3948 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3949 struct page *page, unsigned int len, struct iattr *sattr,
3950 struct nfs4_label *label)
3952 struct nfs4_createdata *data;
3953 int status = -ENAMETOOLONG;
3955 if (len > NFS4_MAXPATHLEN)
3959 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3963 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3964 data->arg.u.symlink.pages = &page;
3965 data->arg.u.symlink.len = len;
3966 data->arg.label = label;
3968 status = nfs4_do_create(dir, dentry, data);
3970 nfs4_free_createdata(data);
3975 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3976 struct page *page, unsigned int len, struct iattr *sattr)
3978 struct nfs4_exception exception = { };
3979 struct nfs4_label l, *label = NULL;
3982 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3985 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3986 trace_nfs4_symlink(dir, &dentry->d_name, err);
3987 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3989 } while (exception.retry);
3991 nfs4_label_release_security(label);
3995 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3996 struct iattr *sattr, struct nfs4_label *label)
3998 struct nfs4_createdata *data;
3999 int status = -ENOMEM;
4001 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4005 data->arg.label = label;
4006 status = nfs4_do_create(dir, dentry, data);
4008 nfs4_free_createdata(data);
4013 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4014 struct iattr *sattr)
4016 struct nfs4_exception exception = { };
4017 struct nfs4_label l, *label = NULL;
4020 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4022 sattr->ia_mode &= ~current_umask();
4024 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4025 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4026 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4028 } while (exception.retry);
4029 nfs4_label_release_security(label);
4034 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4035 u64 cookie, struct page **pages, unsigned int count, int plus)
4037 struct inode *dir = d_inode(dentry);
4038 struct nfs4_readdir_arg args = {
4043 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
4046 struct nfs4_readdir_res res;
4047 struct rpc_message msg = {
4048 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4055 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4057 (unsigned long long)cookie);
4058 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
4059 res.pgbase = args.pgbase;
4060 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4062 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
4063 status += args.pgbase;
4066 nfs_invalidate_atime(dir);
4068 dprintk("%s: returns %d\n", __func__, status);
4072 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4073 u64 cookie, struct page **pages, unsigned int count, int plus)
4075 struct nfs4_exception exception = { };
4078 err = _nfs4_proc_readdir(dentry, cred, cookie,
4079 pages, count, plus);
4080 trace_nfs4_readdir(d_inode(dentry), err);
4081 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
4083 } while (exception.retry);
4087 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4088 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4090 struct nfs4_createdata *data;
4091 int mode = sattr->ia_mode;
4092 int status = -ENOMEM;
4094 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4099 data->arg.ftype = NF4FIFO;
4100 else if (S_ISBLK(mode)) {
4101 data->arg.ftype = NF4BLK;
4102 data->arg.u.device.specdata1 = MAJOR(rdev);
4103 data->arg.u.device.specdata2 = MINOR(rdev);
4105 else if (S_ISCHR(mode)) {
4106 data->arg.ftype = NF4CHR;
4107 data->arg.u.device.specdata1 = MAJOR(rdev);
4108 data->arg.u.device.specdata2 = MINOR(rdev);
4109 } else if (!S_ISSOCK(mode)) {
4114 data->arg.label = label;
4115 status = nfs4_do_create(dir, dentry, data);
4117 nfs4_free_createdata(data);
4122 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4123 struct iattr *sattr, dev_t rdev)
4125 struct nfs4_exception exception = { };
4126 struct nfs4_label l, *label = NULL;
4129 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4131 sattr->ia_mode &= ~current_umask();
4133 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4134 trace_nfs4_mknod(dir, &dentry->d_name, err);
4135 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4137 } while (exception.retry);
4139 nfs4_label_release_security(label);
4144 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4145 struct nfs_fsstat *fsstat)
4147 struct nfs4_statfs_arg args = {
4149 .bitmask = server->attr_bitmask,
4151 struct nfs4_statfs_res res = {
4154 struct rpc_message msg = {
4155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4160 nfs_fattr_init(fsstat->fattr);
4161 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4164 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4166 struct nfs4_exception exception = { };
4169 err = nfs4_handle_exception(server,
4170 _nfs4_proc_statfs(server, fhandle, fsstat),
4172 } while (exception.retry);
4176 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4177 struct nfs_fsinfo *fsinfo)
4179 struct nfs4_fsinfo_arg args = {
4181 .bitmask = server->attr_bitmask,
4183 struct nfs4_fsinfo_res res = {
4186 struct rpc_message msg = {
4187 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4192 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4195 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4197 struct nfs4_exception exception = { };
4198 unsigned long now = jiffies;
4202 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4203 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4205 struct nfs_client *clp = server->nfs_client;
4207 spin_lock(&clp->cl_lock);
4208 clp->cl_lease_time = fsinfo->lease_time * HZ;
4209 clp->cl_last_renewal = now;
4210 spin_unlock(&clp->cl_lock);
4213 err = nfs4_handle_exception(server, err, &exception);
4214 } while (exception.retry);
4218 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4222 nfs_fattr_init(fsinfo->fattr);
4223 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4225 /* block layout checks this! */
4226 server->pnfs_blksize = fsinfo->blksize;
4227 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
4233 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4234 struct nfs_pathconf *pathconf)
4236 struct nfs4_pathconf_arg args = {
4238 .bitmask = server->attr_bitmask,
4240 struct nfs4_pathconf_res res = {
4241 .pathconf = pathconf,
4243 struct rpc_message msg = {
4244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4249 /* None of the pathconf attributes are mandatory to implement */
4250 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4251 memset(pathconf, 0, sizeof(*pathconf));
4255 nfs_fattr_init(pathconf->fattr);
4256 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4259 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4260 struct nfs_pathconf *pathconf)
4262 struct nfs4_exception exception = { };
4266 err = nfs4_handle_exception(server,
4267 _nfs4_proc_pathconf(server, fhandle, pathconf),
4269 } while (exception.retry);
4273 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4274 const struct nfs_open_context *ctx,
4275 const struct nfs_lock_context *l_ctx,
4278 const struct nfs_lockowner *lockowner = NULL;
4281 lockowner = &l_ctx->lockowner;
4282 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
4284 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4286 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4287 const struct nfs_open_context *ctx,
4288 const struct nfs_lock_context *l_ctx,
4291 nfs4_stateid current_stateid;
4293 /* If the current stateid represents a lost lock, then exit */
4294 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4296 return nfs4_stateid_match(stateid, ¤t_stateid);
4299 static bool nfs4_error_stateid_expired(int err)
4302 case -NFS4ERR_DELEG_REVOKED:
4303 case -NFS4ERR_ADMIN_REVOKED:
4304 case -NFS4ERR_BAD_STATEID:
4305 case -NFS4ERR_STALE_STATEID:
4306 case -NFS4ERR_OLD_STATEID:
4307 case -NFS4ERR_OPENMODE:
4308 case -NFS4ERR_EXPIRED:
4314 void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
4316 nfs_invalidate_atime(hdr->inode);
4319 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4321 struct nfs_server *server = NFS_SERVER(hdr->inode);
4323 trace_nfs4_read(hdr, task->tk_status);
4324 if (nfs4_async_handle_error(task, server,
4325 hdr->args.context->state,
4327 rpc_restart_call_prepare(task);
4331 __nfs4_read_done_cb(hdr);
4332 if (task->tk_status > 0)
4333 renew_lease(server, hdr->timestamp);
4337 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4338 struct nfs_pgio_args *args)
4341 if (!nfs4_error_stateid_expired(task->tk_status) ||
4342 nfs4_stateid_is_current(&args->stateid,
4347 rpc_restart_call_prepare(task);
4351 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4354 dprintk("--> %s\n", __func__);
4356 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4358 if (nfs4_read_stateid_changed(task, &hdr->args))
4360 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4361 nfs4_read_done_cb(task, hdr);
4364 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4365 struct rpc_message *msg)
4367 hdr->timestamp = jiffies;
4368 hdr->pgio_done_cb = nfs4_read_done_cb;
4369 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4370 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4373 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4374 struct nfs_pgio_header *hdr)
4376 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4377 &hdr->args.seq_args,
4381 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4382 hdr->args.lock_context,
4383 hdr->rw_ops->rw_mode) == -EIO)
4385 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4390 static int nfs4_write_done_cb(struct rpc_task *task,
4391 struct nfs_pgio_header *hdr)
4393 struct inode *inode = hdr->inode;
4395 trace_nfs4_write(hdr, task->tk_status);
4396 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4397 hdr->args.context->state,
4399 rpc_restart_call_prepare(task);
4402 if (task->tk_status >= 0) {
4403 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4404 nfs_writeback_update_inode(hdr);
4409 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4410 struct nfs_pgio_args *args)
4413 if (!nfs4_error_stateid_expired(task->tk_status) ||
4414 nfs4_stateid_is_current(&args->stateid,
4419 rpc_restart_call_prepare(task);
4423 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4425 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4427 if (nfs4_write_stateid_changed(task, &hdr->args))
4429 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4430 nfs4_write_done_cb(task, hdr);
4434 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4436 /* Don't request attributes for pNFS or O_DIRECT writes */
4437 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4439 /* Otherwise, request attributes if and only if we don't hold
4442 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4445 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4446 struct rpc_message *msg)
4448 struct nfs_server *server = NFS_SERVER(hdr->inode);
4450 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4451 hdr->args.bitmask = NULL;
4452 hdr->res.fattr = NULL;
4454 hdr->args.bitmask = server->cache_consistency_bitmask;
4456 if (!hdr->pgio_done_cb)
4457 hdr->pgio_done_cb = nfs4_write_done_cb;
4458 hdr->res.server = server;
4459 hdr->timestamp = jiffies;
4461 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4462 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4465 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4467 nfs4_setup_sequence(NFS_SERVER(data->inode),
4468 &data->args.seq_args,
4473 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4475 struct inode *inode = data->inode;
4477 trace_nfs4_commit(data, task->tk_status);
4478 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4479 NULL, NULL) == -EAGAIN) {
4480 rpc_restart_call_prepare(task);
4486 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4488 if (!nfs4_sequence_done(task, &data->res.seq_res))
4490 return data->commit_done_cb(task, data);
4493 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4495 struct nfs_server *server = NFS_SERVER(data->inode);
4497 if (data->commit_done_cb == NULL)
4498 data->commit_done_cb = nfs4_commit_done_cb;
4499 data->res.server = server;
4500 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4501 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4504 struct nfs4_renewdata {
4505 struct nfs_client *client;
4506 unsigned long timestamp;
4510 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4511 * standalone procedure for queueing an asynchronous RENEW.
4513 static void nfs4_renew_release(void *calldata)
4515 struct nfs4_renewdata *data = calldata;
4516 struct nfs_client *clp = data->client;
4518 if (atomic_read(&clp->cl_count) > 1)
4519 nfs4_schedule_state_renewal(clp);
4520 nfs_put_client(clp);
4524 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4526 struct nfs4_renewdata *data = calldata;
4527 struct nfs_client *clp = data->client;
4528 unsigned long timestamp = data->timestamp;
4530 trace_nfs4_renew_async(clp, task->tk_status);
4531 switch (task->tk_status) {
4534 case -NFS4ERR_LEASE_MOVED:
4535 nfs4_schedule_lease_moved_recovery(clp);
4538 /* Unless we're shutting down, schedule state recovery! */
4539 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4541 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4542 nfs4_schedule_lease_recovery(clp);
4545 nfs4_schedule_path_down_recovery(clp);
4547 do_renew_lease(clp, timestamp);
4550 static const struct rpc_call_ops nfs4_renew_ops = {
4551 .rpc_call_done = nfs4_renew_done,
4552 .rpc_release = nfs4_renew_release,
4555 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4557 struct rpc_message msg = {
4558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4562 struct nfs4_renewdata *data;
4564 if (renew_flags == 0)
4566 if (!atomic_inc_not_zero(&clp->cl_count))
4568 data = kmalloc(sizeof(*data), GFP_NOFS);
4572 data->timestamp = jiffies;
4573 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4574 &nfs4_renew_ops, data);
4577 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4579 struct rpc_message msg = {
4580 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4584 unsigned long now = jiffies;
4587 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4590 do_renew_lease(clp, now);
4594 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4596 return server->caps & NFS_CAP_ACLS;
4599 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4600 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4603 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4605 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4606 struct page **pages)
4608 struct page *newpage, **spages;
4614 len = min_t(size_t, PAGE_SIZE, buflen);
4615 newpage = alloc_page(GFP_KERNEL);
4617 if (newpage == NULL)
4619 memcpy(page_address(newpage), buf, len);
4624 } while (buflen != 0);
4630 __free_page(spages[rc-1]);
4634 struct nfs4_cached_acl {
4640 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4642 struct nfs_inode *nfsi = NFS_I(inode);
4644 spin_lock(&inode->i_lock);
4645 kfree(nfsi->nfs4_acl);
4646 nfsi->nfs4_acl = acl;
4647 spin_unlock(&inode->i_lock);
4650 static void nfs4_zap_acl_attr(struct inode *inode)
4652 nfs4_set_cached_acl(inode, NULL);
4655 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4657 struct nfs_inode *nfsi = NFS_I(inode);
4658 struct nfs4_cached_acl *acl;
4661 spin_lock(&inode->i_lock);
4662 acl = nfsi->nfs4_acl;
4665 if (buf == NULL) /* user is just asking for length */
4667 if (acl->cached == 0)
4669 ret = -ERANGE; /* see getxattr(2) man page */
4670 if (acl->len > buflen)
4672 memcpy(buf, acl->data, acl->len);
4676 spin_unlock(&inode->i_lock);
4680 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4682 struct nfs4_cached_acl *acl;
4683 size_t buflen = sizeof(*acl) + acl_len;
4685 if (buflen <= PAGE_SIZE) {
4686 acl = kmalloc(buflen, GFP_KERNEL);
4690 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4692 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4699 nfs4_set_cached_acl(inode, acl);
4703 * The getxattr API returns the required buffer length when called with a
4704 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4705 * the required buf. On a NULL buf, we send a page of data to the server
4706 * guessing that the ACL request can be serviced by a page. If so, we cache
4707 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4708 * the cache. If not so, we throw away the page, and cache the required
4709 * length. The next getxattr call will then produce another round trip to
4710 * the server, this time with the input buf of the required size.
4712 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4714 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
4715 struct nfs_getaclargs args = {
4716 .fh = NFS_FH(inode),
4720 struct nfs_getaclres res = {
4723 struct rpc_message msg = {
4724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4728 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
4729 int ret = -ENOMEM, i;
4731 if (npages > ARRAY_SIZE(pages))
4734 for (i = 0; i < npages; i++) {
4735 pages[i] = alloc_page(GFP_KERNEL);
4740 /* for decoding across pages */
4741 res.acl_scratch = alloc_page(GFP_KERNEL);
4742 if (!res.acl_scratch)
4745 args.acl_len = npages * PAGE_SIZE;
4747 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4748 __func__, buf, buflen, npages, args.acl_len);
4749 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4750 &msg, &args.seq_args, &res.seq_res, 0);
4754 /* Handle the case where the passed-in buffer is too short */
4755 if (res.acl_flags & NFS4_ACL_TRUNC) {
4756 /* Did the user only issue a request for the acl length? */
4762 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
4764 if (res.acl_len > buflen) {
4768 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
4773 for (i = 0; i < npages; i++)
4775 __free_page(pages[i]);
4776 if (res.acl_scratch)
4777 __free_page(res.acl_scratch);
4781 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4783 struct nfs4_exception exception = { };
4786 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4787 trace_nfs4_get_acl(inode, ret);
4790 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4791 } while (exception.retry);
4795 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4797 struct nfs_server *server = NFS_SERVER(inode);
4800 if (!nfs4_server_supports_acls(server))
4802 ret = nfs_revalidate_inode(server, inode);
4805 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4806 nfs_zap_acl_cache(inode);
4807 ret = nfs4_read_cached_acl(inode, buf, buflen);
4809 /* -ENOENT is returned if there is no ACL or if there is an ACL
4810 * but no cached acl data, just the acl length */
4812 return nfs4_get_acl_uncached(inode, buf, buflen);
4815 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4817 struct nfs_server *server = NFS_SERVER(inode);
4818 struct page *pages[NFS4ACL_MAXPAGES];
4819 struct nfs_setaclargs arg = {
4820 .fh = NFS_FH(inode),
4824 struct nfs_setaclres res;
4825 struct rpc_message msg = {
4826 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4830 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4833 if (!nfs4_server_supports_acls(server))
4835 if (npages > ARRAY_SIZE(pages))
4837 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
4840 nfs4_inode_return_delegation(inode);
4841 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4844 * Free each page after tx, so the only ref left is
4845 * held by the network stack
4848 put_page(pages[i-1]);
4851 * Acl update can result in inode attribute update.
4852 * so mark the attribute cache invalid.
4854 spin_lock(&inode->i_lock);
4855 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4856 spin_unlock(&inode->i_lock);
4857 nfs_access_zap_cache(inode);
4858 nfs_zap_acl_cache(inode);
4862 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4864 struct nfs4_exception exception = { };
4867 err = __nfs4_proc_set_acl(inode, buf, buflen);
4868 trace_nfs4_set_acl(inode, err);
4869 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4871 } while (exception.retry);
4875 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
4876 static int _nfs4_get_security_label(struct inode *inode, void *buf,
4879 struct nfs_server *server = NFS_SERVER(inode);
4880 struct nfs_fattr fattr;
4881 struct nfs4_label label = {0, 0, buflen, buf};
4883 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4884 struct nfs4_getattr_arg arg = {
4885 .fh = NFS_FH(inode),
4888 struct nfs4_getattr_res res = {
4893 struct rpc_message msg = {
4894 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4900 nfs_fattr_init(&fattr);
4902 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
4905 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4907 if (buflen < label.len)
4912 static int nfs4_get_security_label(struct inode *inode, void *buf,
4915 struct nfs4_exception exception = { };
4918 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4922 err = _nfs4_get_security_label(inode, buf, buflen);
4923 trace_nfs4_get_security_label(inode, err);
4924 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4926 } while (exception.retry);
4930 static int _nfs4_do_set_security_label(struct inode *inode,
4931 struct nfs4_label *ilabel,
4932 struct nfs_fattr *fattr,
4933 struct nfs4_label *olabel)
4936 struct iattr sattr = {0};
4937 struct nfs_server *server = NFS_SERVER(inode);
4938 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4939 struct nfs_setattrargs arg = {
4940 .fh = NFS_FH(inode),
4946 struct nfs_setattrres res = {
4951 struct rpc_message msg = {
4952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4958 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
4960 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4962 dprintk("%s failed: %d\n", __func__, status);
4967 static int nfs4_do_set_security_label(struct inode *inode,
4968 struct nfs4_label *ilabel,
4969 struct nfs_fattr *fattr,
4970 struct nfs4_label *olabel)
4972 struct nfs4_exception exception = { };
4976 err = _nfs4_do_set_security_label(inode, ilabel,
4978 trace_nfs4_set_security_label(inode, err);
4979 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4981 } while (exception.retry);
4986 nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4988 struct nfs4_label ilabel, *olabel = NULL;
4989 struct nfs_fattr fattr;
4990 struct rpc_cred *cred;
4991 struct inode *inode = d_inode(dentry);
4994 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4997 nfs_fattr_init(&fattr);
5001 ilabel.label = (char *)buf;
5002 ilabel.len = buflen;
5004 cred = rpc_lookup_cred();
5006 return PTR_ERR(cred);
5008 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5009 if (IS_ERR(olabel)) {
5010 status = -PTR_ERR(olabel);
5014 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5016 nfs_setsecurity(inode, &fattr, olabel);
5018 nfs4_label_free(olabel);
5023 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5026 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5027 nfs4_verifier *bootverf)
5031 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5032 /* An impossible timestamp guarantees this value
5033 * will never match a generated boot time. */
5035 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
5037 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5038 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5039 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
5041 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5045 nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5051 if (clp->cl_owner_id != NULL)
5055 len = 14 + strlen(clp->cl_ipaddr) + 1 +
5056 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5058 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5062 if (len > NFS4_OPAQUE_LIMIT + 1)
5066 * Since this string is allocated at mount time, and held until the
5067 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5068 * about a memory-reclaim deadlock.
5070 str = kmalloc(len, GFP_KERNEL);
5075 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5077 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5078 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
5081 clp->cl_owner_id = str;
5086 nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5092 len = 10 + 10 + 1 + 10 + 1 +
5093 strlen(nfs4_client_id_uniquifier) + 1 +
5094 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5096 if (len > NFS4_OPAQUE_LIMIT + 1)
5100 * Since this string is allocated at mount time, and held until the
5101 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5102 * about a memory-reclaim deadlock.
5104 str = kmalloc(len, GFP_KERNEL);
5108 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5109 clp->rpc_ops->version, clp->cl_minorversion,
5110 nfs4_client_id_uniquifier,
5111 clp->cl_rpcclient->cl_nodename);
5112 clp->cl_owner_id = str;
5117 nfs4_init_uniform_client_string(struct nfs_client *clp)
5123 if (clp->cl_owner_id != NULL)
5126 if (nfs4_client_id_uniquifier[0] != '\0')
5127 return nfs4_init_uniquifier_client_string(clp);
5129 len = 10 + 10 + 1 + 10 + 1 +
5130 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5132 if (len > NFS4_OPAQUE_LIMIT + 1)
5136 * Since this string is allocated at mount time, and held until the
5137 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5138 * about a memory-reclaim deadlock.
5140 str = kmalloc(len, GFP_KERNEL);
5144 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5145 clp->rpc_ops->version, clp->cl_minorversion,
5146 clp->cl_rpcclient->cl_nodename);
5147 clp->cl_owner_id = str;
5152 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5153 * services. Advertise one based on the address family of the
5157 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5159 if (strchr(clp->cl_ipaddr, ':') != NULL)
5160 return scnprintf(buf, len, "tcp6");
5162 return scnprintf(buf, len, "tcp");
5165 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5167 struct nfs4_setclientid *sc = calldata;
5169 if (task->tk_status == 0)
5170 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5173 static const struct rpc_call_ops nfs4_setclientid_ops = {
5174 .rpc_call_done = nfs4_setclientid_done,
5178 * nfs4_proc_setclientid - Negotiate client ID
5179 * @clp: state data structure
5180 * @program: RPC program for NFSv4 callback service
5181 * @port: IP port number for NFS4 callback service
5182 * @cred: RPC credential to use for this call
5183 * @res: where to place the result
5185 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5187 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5188 unsigned short port, struct rpc_cred *cred,
5189 struct nfs4_setclientid_res *res)
5191 nfs4_verifier sc_verifier;
5192 struct nfs4_setclientid setclientid = {
5193 .sc_verifier = &sc_verifier,
5197 struct rpc_message msg = {
5198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5199 .rpc_argp = &setclientid,
5203 struct rpc_task *task;
5204 struct rpc_task_setup task_setup_data = {
5205 .rpc_client = clp->cl_rpcclient,
5206 .rpc_message = &msg,
5207 .callback_ops = &nfs4_setclientid_ops,
5208 .callback_data = &setclientid,
5209 .flags = RPC_TASK_TIMEOUT,
5213 /* nfs_client_id4 */
5214 nfs4_init_boot_verifier(clp, &sc_verifier);
5216 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5217 status = nfs4_init_uniform_client_string(clp);
5219 status = nfs4_init_nonuniform_client_string(clp);
5225 setclientid.sc_netid_len =
5226 nfs4_init_callback_netid(clp,
5227 setclientid.sc_netid,
5228 sizeof(setclientid.sc_netid));
5229 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5230 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5231 clp->cl_ipaddr, port >> 8, port & 255);
5233 dprintk("NFS call setclientid auth=%s, '%s'\n",
5234 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5236 task = rpc_run_task(&task_setup_data);
5238 status = PTR_ERR(task);
5241 status = task->tk_status;
5242 if (setclientid.sc_cred) {
5243 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5244 put_rpccred(setclientid.sc_cred);
5248 trace_nfs4_setclientid(clp, status);
5249 dprintk("NFS reply setclientid: %d\n", status);
5254 * nfs4_proc_setclientid_confirm - Confirm client ID
5255 * @clp: state data structure
5256 * @res: result of a previous SETCLIENTID
5257 * @cred: RPC credential to use for this call
5259 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5261 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5262 struct nfs4_setclientid_res *arg,
5263 struct rpc_cred *cred)
5265 struct rpc_message msg = {
5266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5272 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5273 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5275 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5276 trace_nfs4_setclientid_confirm(clp, status);
5277 dprintk("NFS reply setclientid_confirm: %d\n", status);
5281 struct nfs4_delegreturndata {
5282 struct nfs4_delegreturnargs args;
5283 struct nfs4_delegreturnres res;
5285 nfs4_stateid stateid;
5286 unsigned long timestamp;
5287 struct nfs_fattr fattr;
5289 struct inode *inode;
5294 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5296 struct nfs4_delegreturndata *data = calldata;
5298 if (!nfs4_sequence_done(task, &data->res.seq_res))
5301 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5302 switch (task->tk_status) {
5304 renew_lease(data->res.server, data->timestamp);
5305 case -NFS4ERR_ADMIN_REVOKED:
5306 case -NFS4ERR_DELEG_REVOKED:
5307 case -NFS4ERR_BAD_STATEID:
5308 case -NFS4ERR_OLD_STATEID:
5309 case -NFS4ERR_STALE_STATEID:
5310 case -NFS4ERR_EXPIRED:
5311 task->tk_status = 0;
5313 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
5316 if (nfs4_async_handle_error(task, data->res.server,
5317 NULL, NULL) == -EAGAIN) {
5318 rpc_restart_call_prepare(task);
5322 data->rpc_status = task->tk_status;
5325 static void nfs4_delegreturn_release(void *calldata)
5327 struct nfs4_delegreturndata *data = calldata;
5328 struct inode *inode = data->inode;
5332 pnfs_roc_release(inode);
5333 nfs_iput_and_deactive(inode);
5338 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5340 struct nfs4_delegreturndata *d_data;
5342 d_data = (struct nfs4_delegreturndata *)data;
5344 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5348 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
5350 nfs4_setup_sequence(d_data->res.server,
5351 &d_data->args.seq_args,
5352 &d_data->res.seq_res,
5356 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5357 .rpc_call_prepare = nfs4_delegreturn_prepare,
5358 .rpc_call_done = nfs4_delegreturn_done,
5359 .rpc_release = nfs4_delegreturn_release,
5362 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5364 struct nfs4_delegreturndata *data;
5365 struct nfs_server *server = NFS_SERVER(inode);
5366 struct rpc_task *task;
5367 struct rpc_message msg = {
5368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5371 struct rpc_task_setup task_setup_data = {
5372 .rpc_client = server->client,
5373 .rpc_message = &msg,
5374 .callback_ops = &nfs4_delegreturn_ops,
5375 .flags = RPC_TASK_ASYNC,
5379 data = kzalloc(sizeof(*data), GFP_NOFS);
5382 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5383 data->args.fhandle = &data->fh;
5384 data->args.stateid = &data->stateid;
5385 data->args.bitmask = server->cache_consistency_bitmask;
5386 nfs_copy_fh(&data->fh, NFS_FH(inode));
5387 nfs4_stateid_copy(&data->stateid, stateid);
5388 data->res.fattr = &data->fattr;
5389 data->res.server = server;
5390 nfs_fattr_init(data->res.fattr);
5391 data->timestamp = jiffies;
5392 data->rpc_status = 0;
5393 data->inode = nfs_igrab_and_active(inode);
5395 data->roc = nfs4_roc(inode);
5397 task_setup_data.callback_data = data;
5398 msg.rpc_argp = &data->args;
5399 msg.rpc_resp = &data->res;
5400 task = rpc_run_task(&task_setup_data);
5402 return PTR_ERR(task);
5405 status = nfs4_wait_for_completion_rpc_task(task);
5408 status = data->rpc_status;
5410 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5412 nfs_refresh_inode(inode, &data->fattr);
5418 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5420 struct nfs_server *server = NFS_SERVER(inode);
5421 struct nfs4_exception exception = { };
5424 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5425 trace_nfs4_delegreturn(inode, err);
5427 case -NFS4ERR_STALE_STATEID:
5428 case -NFS4ERR_EXPIRED:
5432 err = nfs4_handle_exception(server, err, &exception);
5433 } while (exception.retry);
5437 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5438 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5441 * sleep, with exponential backoff, and retry the LOCK operation.
5443 static unsigned long
5444 nfs4_set_lock_task_retry(unsigned long timeout)
5446 freezable_schedule_timeout_killable_unsafe(timeout);
5448 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5449 return NFS4_LOCK_MAXTIMEOUT;
5453 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5455 struct inode *inode = state->inode;
5456 struct nfs_server *server = NFS_SERVER(inode);
5457 struct nfs_client *clp = server->nfs_client;
5458 struct nfs_lockt_args arg = {
5459 .fh = NFS_FH(inode),
5462 struct nfs_lockt_res res = {
5465 struct rpc_message msg = {
5466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5469 .rpc_cred = state->owner->so_cred,
5471 struct nfs4_lock_state *lsp;
5474 arg.lock_owner.clientid = clp->cl_clientid;
5475 status = nfs4_set_lock_state(state, request);
5478 lsp = request->fl_u.nfs4_fl.owner;
5479 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5480 arg.lock_owner.s_dev = server->s_dev;
5481 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5484 request->fl_type = F_UNLCK;
5486 case -NFS4ERR_DENIED:
5489 request->fl_ops->fl_release_private(request);
5490 request->fl_ops = NULL;
5495 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5497 struct nfs4_exception exception = { };
5501 err = _nfs4_proc_getlk(state, cmd, request);
5502 trace_nfs4_get_lock(request, state, cmd, err);
5503 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5505 } while (exception.retry);
5509 static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
5511 return locks_lock_inode_wait(inode, fl);
5514 struct nfs4_unlockdata {
5515 struct nfs_locku_args arg;
5516 struct nfs_locku_res res;
5517 struct nfs4_lock_state *lsp;
5518 struct nfs_open_context *ctx;
5519 struct file_lock fl;
5520 struct nfs_server *server;
5521 unsigned long timestamp;
5524 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5525 struct nfs_open_context *ctx,
5526 struct nfs4_lock_state *lsp,
5527 struct nfs_seqid *seqid)
5529 struct nfs4_unlockdata *p;
5530 struct inode *inode = lsp->ls_state->inode;
5532 p = kzalloc(sizeof(*p), GFP_NOFS);
5535 p->arg.fh = NFS_FH(inode);
5537 p->arg.seqid = seqid;
5538 p->res.seqid = seqid;
5540 atomic_inc(&lsp->ls_count);
5541 /* Ensure we don't close file until we're done freeing locks! */
5542 p->ctx = get_nfs_open_context(ctx);
5543 memcpy(&p->fl, fl, sizeof(p->fl));
5544 p->server = NFS_SERVER(inode);
5548 static void nfs4_locku_release_calldata(void *data)
5550 struct nfs4_unlockdata *calldata = data;
5551 nfs_free_seqid(calldata->arg.seqid);
5552 nfs4_put_lock_state(calldata->lsp);
5553 put_nfs_open_context(calldata->ctx);
5557 static void nfs4_locku_done(struct rpc_task *task, void *data)
5559 struct nfs4_unlockdata *calldata = data;
5561 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5563 switch (task->tk_status) {
5565 renew_lease(calldata->server, calldata->timestamp);
5566 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
5567 if (nfs4_update_lock_stateid(calldata->lsp,
5568 &calldata->res.stateid))
5570 case -NFS4ERR_BAD_STATEID:
5571 case -NFS4ERR_OLD_STATEID:
5572 case -NFS4ERR_STALE_STATEID:
5573 case -NFS4ERR_EXPIRED:
5574 if (!nfs4_stateid_match(&calldata->arg.stateid,
5575 &calldata->lsp->ls_stateid))
5576 rpc_restart_call_prepare(task);
5579 if (nfs4_async_handle_error(task, calldata->server,
5580 NULL, NULL) == -EAGAIN)
5581 rpc_restart_call_prepare(task);
5583 nfs_release_seqid(calldata->arg.seqid);
5586 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5588 struct nfs4_unlockdata *calldata = data;
5590 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5592 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
5593 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5594 /* Note: exit _without_ running nfs4_locku_done */
5597 calldata->timestamp = jiffies;
5598 if (nfs4_setup_sequence(calldata->server,
5599 &calldata->arg.seq_args,
5600 &calldata->res.seq_res,
5602 nfs_release_seqid(calldata->arg.seqid);
5605 task->tk_action = NULL;
5607 nfs4_sequence_done(task, &calldata->res.seq_res);
5610 static const struct rpc_call_ops nfs4_locku_ops = {
5611 .rpc_call_prepare = nfs4_locku_prepare,
5612 .rpc_call_done = nfs4_locku_done,
5613 .rpc_release = nfs4_locku_release_calldata,
5616 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5617 struct nfs_open_context *ctx,
5618 struct nfs4_lock_state *lsp,
5619 struct nfs_seqid *seqid)
5621 struct nfs4_unlockdata *data;
5622 struct rpc_message msg = {
5623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5624 .rpc_cred = ctx->cred,
5626 struct rpc_task_setup task_setup_data = {
5627 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5628 .rpc_message = &msg,
5629 .callback_ops = &nfs4_locku_ops,
5630 .workqueue = nfsiod_workqueue,
5631 .flags = RPC_TASK_ASYNC,
5634 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5635 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5637 /* Ensure this is an unlock - when canceling a lock, the
5638 * canceled lock is passed in, and it won't be an unlock.
5640 fl->fl_type = F_UNLCK;
5642 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5644 nfs_free_seqid(seqid);
5645 return ERR_PTR(-ENOMEM);
5648 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5649 msg.rpc_argp = &data->arg;
5650 msg.rpc_resp = &data->res;
5651 task_setup_data.callback_data = data;
5652 return rpc_run_task(&task_setup_data);
5655 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5657 struct inode *inode = state->inode;
5658 struct nfs4_state_owner *sp = state->owner;
5659 struct nfs_inode *nfsi = NFS_I(inode);
5660 struct nfs_seqid *seqid;
5661 struct nfs4_lock_state *lsp;
5662 struct rpc_task *task;
5663 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5665 unsigned char fl_flags = request->fl_flags;
5667 status = nfs4_set_lock_state(state, request);
5668 /* Unlock _before_ we do the RPC call */
5669 request->fl_flags |= FL_EXISTS;
5670 /* Exclude nfs_delegation_claim_locks() */
5671 mutex_lock(&sp->so_delegreturn_mutex);
5672 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5673 down_read(&nfsi->rwsem);
5674 if (do_vfs_lock(inode, request) == -ENOENT) {
5675 up_read(&nfsi->rwsem);
5676 mutex_unlock(&sp->so_delegreturn_mutex);
5679 up_read(&nfsi->rwsem);
5680 mutex_unlock(&sp->so_delegreturn_mutex);
5683 /* Is this a delegated lock? */
5684 lsp = request->fl_u.nfs4_fl.owner;
5685 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5687 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5688 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5692 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5693 status = PTR_ERR(task);
5696 status = nfs4_wait_for_completion_rpc_task(task);
5699 request->fl_flags = fl_flags;
5700 trace_nfs4_unlock(request, state, F_SETLK, status);
5704 struct nfs4_lockdata {
5705 struct nfs_lock_args arg;
5706 struct nfs_lock_res res;
5707 struct nfs4_lock_state *lsp;
5708 struct nfs_open_context *ctx;
5709 struct file_lock fl;
5710 unsigned long timestamp;
5713 struct nfs_server *server;
5716 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5717 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5720 struct nfs4_lockdata *p;
5721 struct inode *inode = lsp->ls_state->inode;
5722 struct nfs_server *server = NFS_SERVER(inode);
5723 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5725 p = kzalloc(sizeof(*p), gfp_mask);
5729 p->arg.fh = NFS_FH(inode);
5731 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
5732 if (IS_ERR(p->arg.open_seqid))
5734 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5735 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
5736 if (IS_ERR(p->arg.lock_seqid))
5737 goto out_free_seqid;
5738 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
5739 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
5740 p->arg.lock_owner.s_dev = server->s_dev;
5741 p->res.lock_seqid = p->arg.lock_seqid;
5744 atomic_inc(&lsp->ls_count);
5745 p->ctx = get_nfs_open_context(ctx);
5746 get_file(fl->fl_file);
5747 memcpy(&p->fl, fl, sizeof(p->fl));
5750 nfs_free_seqid(p->arg.open_seqid);
5756 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5758 struct nfs4_lockdata *data = calldata;
5759 struct nfs4_state *state = data->lsp->ls_state;
5761 dprintk("%s: begin!\n", __func__);
5762 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
5764 /* Do we need to do an open_to_lock_owner? */
5765 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
5766 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
5767 goto out_release_lock_seqid;
5769 nfs4_stateid_copy(&data->arg.open_stateid,
5770 &state->open_stateid);
5771 data->arg.new_lock_owner = 1;
5772 data->res.open_seqid = data->arg.open_seqid;
5774 data->arg.new_lock_owner = 0;
5775 nfs4_stateid_copy(&data->arg.lock_stateid,
5776 &data->lsp->ls_stateid);
5778 if (!nfs4_valid_open_stateid(state)) {
5779 data->rpc_status = -EBADF;
5780 task->tk_action = NULL;
5781 goto out_release_open_seqid;
5783 data->timestamp = jiffies;
5784 if (nfs4_setup_sequence(data->server,
5785 &data->arg.seq_args,
5789 out_release_open_seqid:
5790 nfs_release_seqid(data->arg.open_seqid);
5791 out_release_lock_seqid:
5792 nfs_release_seqid(data->arg.lock_seqid);
5794 nfs4_sequence_done(task, &data->res.seq_res);
5795 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
5798 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5800 struct nfs4_lockdata *data = calldata;
5801 struct nfs4_lock_state *lsp = data->lsp;
5803 dprintk("%s: begin!\n", __func__);
5805 if (!nfs4_sequence_done(task, &data->res.seq_res))
5808 data->rpc_status = task->tk_status;
5809 switch (task->tk_status) {
5811 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
5813 if (data->arg.new_lock) {
5814 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5815 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
5816 rpc_restart_call_prepare(task);
5820 if (data->arg.new_lock_owner != 0) {
5821 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5822 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5823 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5824 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5825 rpc_restart_call_prepare(task);
5827 case -NFS4ERR_BAD_STATEID:
5828 case -NFS4ERR_OLD_STATEID:
5829 case -NFS4ERR_STALE_STATEID:
5830 case -NFS4ERR_EXPIRED:
5831 if (data->arg.new_lock_owner != 0) {
5832 if (!nfs4_stateid_match(&data->arg.open_stateid,
5833 &lsp->ls_state->open_stateid))
5834 rpc_restart_call_prepare(task);
5835 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5837 rpc_restart_call_prepare(task);
5839 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
5842 static void nfs4_lock_release(void *calldata)
5844 struct nfs4_lockdata *data = calldata;
5846 dprintk("%s: begin!\n", __func__);
5847 nfs_free_seqid(data->arg.open_seqid);
5848 if (data->cancelled != 0) {
5849 struct rpc_task *task;
5850 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5851 data->arg.lock_seqid);
5853 rpc_put_task_async(task);
5854 dprintk("%s: cancelling lock!\n", __func__);
5856 nfs_free_seqid(data->arg.lock_seqid);
5857 nfs4_put_lock_state(data->lsp);
5858 put_nfs_open_context(data->ctx);
5859 fput(data->fl.fl_file);
5861 dprintk("%s: done!\n", __func__);
5864 static const struct rpc_call_ops nfs4_lock_ops = {
5865 .rpc_call_prepare = nfs4_lock_prepare,
5866 .rpc_call_done = nfs4_lock_done,
5867 .rpc_release = nfs4_lock_release,
5870 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5873 case -NFS4ERR_ADMIN_REVOKED:
5874 case -NFS4ERR_BAD_STATEID:
5875 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5876 if (new_lock_owner != 0 ||
5877 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
5878 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
5880 case -NFS4ERR_STALE_STATEID:
5881 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
5882 case -NFS4ERR_EXPIRED:
5883 nfs4_schedule_lease_recovery(server->nfs_client);
5887 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
5889 struct nfs4_lockdata *data;
5890 struct rpc_task *task;
5891 struct rpc_message msg = {
5892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5893 .rpc_cred = state->owner->so_cred,
5895 struct rpc_task_setup task_setup_data = {
5896 .rpc_client = NFS_CLIENT(state->inode),
5897 .rpc_message = &msg,
5898 .callback_ops = &nfs4_lock_ops,
5899 .workqueue = nfsiod_workqueue,
5900 .flags = RPC_TASK_ASYNC,
5904 dprintk("%s: begin!\n", __func__);
5905 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
5906 fl->fl_u.nfs4_fl.owner,
5907 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
5911 data->arg.block = 1;
5912 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5913 msg.rpc_argp = &data->arg;
5914 msg.rpc_resp = &data->res;
5915 task_setup_data.callback_data = data;
5916 if (recovery_type > NFS_LOCK_NEW) {
5917 if (recovery_type == NFS_LOCK_RECLAIM)
5918 data->arg.reclaim = NFS_LOCK_RECLAIM;
5919 nfs4_set_sequence_privileged(&data->arg.seq_args);
5921 data->arg.new_lock = 1;
5922 task = rpc_run_task(&task_setup_data);
5924 return PTR_ERR(task);
5925 ret = nfs4_wait_for_completion_rpc_task(task);
5927 ret = data->rpc_status;
5929 nfs4_handle_setlk_error(data->server, data->lsp,
5930 data->arg.new_lock_owner, ret);
5932 data->cancelled = 1;
5934 dprintk("%s: done, ret = %d!\n", __func__, ret);
5938 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5940 struct nfs_server *server = NFS_SERVER(state->inode);
5941 struct nfs4_exception exception = {
5942 .inode = state->inode,
5947 /* Cache the lock if possible... */
5948 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5950 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
5951 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
5952 if (err != -NFS4ERR_DELAY)
5954 nfs4_handle_exception(server, err, &exception);
5955 } while (exception.retry);
5959 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5961 struct nfs_server *server = NFS_SERVER(state->inode);
5962 struct nfs4_exception exception = {
5963 .inode = state->inode,
5967 err = nfs4_set_lock_state(state, request);
5970 if (!recover_lost_locks) {
5971 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5975 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5977 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
5978 trace_nfs4_lock_expired(request, state, F_SETLK, err);
5982 case -NFS4ERR_GRACE:
5983 case -NFS4ERR_DELAY:
5984 nfs4_handle_exception(server, err, &exception);
5987 } while (exception.retry);
5992 #if defined(CONFIG_NFS_V4_1)
5994 * nfs41_check_expired_locks - possibly free a lock stateid
5996 * @state: NFSv4 state for an inode
5998 * Returns NFS_OK if recovery for this stateid is now finished.
5999 * Otherwise a negative NFS4ERR value is returned.
6001 static int nfs41_check_expired_locks(struct nfs4_state *state)
6003 int status, ret = -NFS4ERR_BAD_STATEID;
6004 struct nfs4_lock_state *lsp;
6005 struct nfs_server *server = NFS_SERVER(state->inode);
6007 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
6008 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
6009 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6011 status = nfs41_test_stateid(server,
6014 trace_nfs4_test_lock_stateid(state, lsp, status);
6015 if (status != NFS_OK) {
6016 /* Free the stateid unless the server
6017 * informs us the stateid is unrecognized. */
6018 if (status != -NFS4ERR_BAD_STATEID)
6019 nfs41_free_stateid(server,
6022 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6031 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6033 int status = NFS_OK;
6035 if (test_bit(LK_STATE_IN_USE, &state->flags))
6036 status = nfs41_check_expired_locks(state);
6037 if (status != NFS_OK)
6038 status = nfs4_lock_expired(state, request);
6043 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6045 struct nfs_inode *nfsi = NFS_I(state->inode);
6046 unsigned char fl_flags = request->fl_flags;
6047 int status = -ENOLCK;
6049 if ((fl_flags & FL_POSIX) &&
6050 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6052 /* Is this a delegated open? */
6053 status = nfs4_set_lock_state(state, request);
6056 request->fl_flags |= FL_ACCESS;
6057 status = do_vfs_lock(state->inode, request);
6060 down_read(&nfsi->rwsem);
6061 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6062 /* Yes: cache locks! */
6063 /* ...but avoid races with delegation recall... */
6064 request->fl_flags = fl_flags & ~FL_SLEEP;
6065 status = do_vfs_lock(state->inode, request);
6066 up_read(&nfsi->rwsem);
6069 up_read(&nfsi->rwsem);
6070 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6072 request->fl_flags = fl_flags;
6076 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6078 struct nfs4_exception exception = {
6080 .inode = state->inode,
6085 err = _nfs4_proc_setlk(state, cmd, request);
6086 trace_nfs4_set_lock(request, state, cmd, err);
6087 if (err == -NFS4ERR_DENIED)
6089 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6091 } while (exception.retry);
6096 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6098 struct nfs_open_context *ctx;
6099 struct nfs4_state *state;
6100 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6103 /* verify open state */
6104 ctx = nfs_file_open_context(filp);
6107 if (request->fl_start < 0 || request->fl_end < 0)
6110 if (IS_GETLK(cmd)) {
6112 return nfs4_proc_getlk(state, F_GETLK, request);
6116 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6119 if (request->fl_type == F_UNLCK) {
6121 return nfs4_proc_unlck(state, cmd, request);
6128 * Don't rely on the VFS having checked the file open mode,
6129 * since it won't do this for flock() locks.
6131 switch (request->fl_type) {
6133 if (!(filp->f_mode & FMODE_READ))
6137 if (!(filp->f_mode & FMODE_WRITE))
6142 status = nfs4_proc_setlk(state, cmd, request);
6143 if ((status != -EAGAIN) || IS_SETLK(cmd))
6145 timeout = nfs4_set_lock_task_retry(timeout);
6146 status = -ERESTARTSYS;
6149 } while(status < 0);
6153 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6155 struct nfs_server *server = NFS_SERVER(state->inode);
6158 err = nfs4_set_lock_state(state, fl);
6161 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6162 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6165 struct nfs_release_lockowner_data {
6166 struct nfs4_lock_state *lsp;
6167 struct nfs_server *server;
6168 struct nfs_release_lockowner_args args;
6169 struct nfs_release_lockowner_res res;
6170 unsigned long timestamp;
6173 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6175 struct nfs_release_lockowner_data *data = calldata;
6176 struct nfs_server *server = data->server;
6177 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6178 &data->args.seq_args, &data->res.seq_res, task);
6179 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6180 data->timestamp = jiffies;
6183 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6185 struct nfs_release_lockowner_data *data = calldata;
6186 struct nfs_server *server = data->server;
6188 nfs40_sequence_done(task, &data->res.seq_res);
6190 switch (task->tk_status) {
6192 renew_lease(server, data->timestamp);
6194 case -NFS4ERR_STALE_CLIENTID:
6195 case -NFS4ERR_EXPIRED:
6196 nfs4_schedule_lease_recovery(server->nfs_client);
6198 case -NFS4ERR_LEASE_MOVED:
6199 case -NFS4ERR_DELAY:
6200 if (nfs4_async_handle_error(task, server,
6201 NULL, NULL) == -EAGAIN)
6202 rpc_restart_call_prepare(task);
6206 static void nfs4_release_lockowner_release(void *calldata)
6208 struct nfs_release_lockowner_data *data = calldata;
6209 nfs4_free_lock_state(data->server, data->lsp);
6213 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6214 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6215 .rpc_call_done = nfs4_release_lockowner_done,
6216 .rpc_release = nfs4_release_lockowner_release,
6220 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6222 struct nfs_release_lockowner_data *data;
6223 struct rpc_message msg = {
6224 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6227 if (server->nfs_client->cl_mvops->minor_version != 0)
6230 data = kmalloc(sizeof(*data), GFP_NOFS);
6234 data->server = server;
6235 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6236 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6237 data->args.lock_owner.s_dev = server->s_dev;
6239 msg.rpc_argp = &data->args;
6240 msg.rpc_resp = &data->res;
6241 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6242 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6245 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6247 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6248 struct dentry *dentry, const char *key,
6249 const void *buf, size_t buflen,
6252 if (strcmp(key, "") != 0)
6255 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6258 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6259 struct dentry *dentry, const char *key,
6260 void *buf, size_t buflen)
6262 if (strcmp(key, "") != 0)
6265 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6268 static size_t nfs4_xattr_list_nfs4_acl(const struct xattr_handler *handler,
6269 struct dentry *dentry, char *list,
6270 size_t list_len, const char *name,
6273 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6275 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
6278 if (list && len <= list_len)
6279 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
6283 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6284 static inline int nfs4_server_supports_labels(struct nfs_server *server)
6286 return server->caps & NFS_CAP_SECURITY_LABEL;
6289 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6290 struct dentry *dentry, const char *key,
6291 const void *buf, size_t buflen,
6294 if (security_ismaclabel(key))
6295 return nfs4_set_security_label(dentry, buf, buflen);
6300 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6301 struct dentry *dentry, const char *key,
6302 void *buf, size_t buflen)
6304 if (security_ismaclabel(key))
6305 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
6309 static size_t nfs4_xattr_list_nfs4_label(const struct xattr_handler *handler,
6310 struct dentry *dentry, char *list,
6311 size_t list_len, const char *name,
6316 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6317 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
6318 if (list && len <= list_len)
6319 security_inode_listsecurity(d_inode(dentry), list, len);
6324 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6325 .prefix = XATTR_SECURITY_PREFIX,
6326 .list = nfs4_xattr_list_nfs4_label,
6327 .get = nfs4_xattr_get_nfs4_label,
6328 .set = nfs4_xattr_set_nfs4_label,
6334 * nfs_fhget will use either the mounted_on_fileid or the fileid
6336 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6338 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6339 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6340 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6341 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6344 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6345 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6346 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6350 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6351 const struct qstr *name,
6352 struct nfs4_fs_locations *fs_locations,
6355 struct nfs_server *server = NFS_SERVER(dir);
6357 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6359 struct nfs4_fs_locations_arg args = {
6360 .dir_fh = NFS_FH(dir),
6365 struct nfs4_fs_locations_res res = {
6366 .fs_locations = fs_locations,
6368 struct rpc_message msg = {
6369 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6375 dprintk("%s: start\n", __func__);
6377 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6378 * is not supported */
6379 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6380 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6382 bitmask[0] |= FATTR4_WORD0_FILEID;
6384 nfs_fattr_init(&fs_locations->fattr);
6385 fs_locations->server = server;
6386 fs_locations->nlocations = 0;
6387 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6388 dprintk("%s: returned status = %d\n", __func__, status);
6392 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6393 const struct qstr *name,
6394 struct nfs4_fs_locations *fs_locations,
6397 struct nfs4_exception exception = { };
6400 err = _nfs4_proc_fs_locations(client, dir, name,
6401 fs_locations, page);
6402 trace_nfs4_get_fs_locations(dir, name, err);
6403 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6405 } while (exception.retry);
6410 * This operation also signals the server that this client is
6411 * performing migration recovery. The server can stop returning
6412 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6413 * appended to this compound to identify the client ID which is
6414 * performing recovery.
6416 static int _nfs40_proc_get_locations(struct inode *inode,
6417 struct nfs4_fs_locations *locations,
6418 struct page *page, struct rpc_cred *cred)
6420 struct nfs_server *server = NFS_SERVER(inode);
6421 struct rpc_clnt *clnt = server->client;
6423 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6425 struct nfs4_fs_locations_arg args = {
6426 .clientid = server->nfs_client->cl_clientid,
6427 .fh = NFS_FH(inode),
6430 .migration = 1, /* skip LOOKUP */
6431 .renew = 1, /* append RENEW */
6433 struct nfs4_fs_locations_res res = {
6434 .fs_locations = locations,
6438 struct rpc_message msg = {
6439 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6444 unsigned long now = jiffies;
6447 nfs_fattr_init(&locations->fattr);
6448 locations->server = server;
6449 locations->nlocations = 0;
6451 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6452 nfs4_set_sequence_privileged(&args.seq_args);
6453 status = nfs4_call_sync_sequence(clnt, server, &msg,
6454 &args.seq_args, &res.seq_res);
6458 renew_lease(server, now);
6462 #ifdef CONFIG_NFS_V4_1
6465 * This operation also signals the server that this client is
6466 * performing migration recovery. The server can stop asserting
6467 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6468 * performing this operation is identified in the SEQUENCE
6469 * operation in this compound.
6471 * When the client supports GETATTR(fs_locations_info), it can
6472 * be plumbed in here.
6474 static int _nfs41_proc_get_locations(struct inode *inode,
6475 struct nfs4_fs_locations *locations,
6476 struct page *page, struct rpc_cred *cred)
6478 struct nfs_server *server = NFS_SERVER(inode);
6479 struct rpc_clnt *clnt = server->client;
6481 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6483 struct nfs4_fs_locations_arg args = {
6484 .fh = NFS_FH(inode),
6487 .migration = 1, /* skip LOOKUP */
6489 struct nfs4_fs_locations_res res = {
6490 .fs_locations = locations,
6493 struct rpc_message msg = {
6494 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6501 nfs_fattr_init(&locations->fattr);
6502 locations->server = server;
6503 locations->nlocations = 0;
6505 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6506 nfs4_set_sequence_privileged(&args.seq_args);
6507 status = nfs4_call_sync_sequence(clnt, server, &msg,
6508 &args.seq_args, &res.seq_res);
6509 if (status == NFS4_OK &&
6510 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6511 status = -NFS4ERR_LEASE_MOVED;
6515 #endif /* CONFIG_NFS_V4_1 */
6518 * nfs4_proc_get_locations - discover locations for a migrated FSID
6519 * @inode: inode on FSID that is migrating
6520 * @locations: result of query
6522 * @cred: credential to use for this operation
6524 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6525 * operation failed, or a negative errno if a local error occurred.
6527 * On success, "locations" is filled in, but if the server has
6528 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6531 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6532 * from this client that require migration recovery.
6534 int nfs4_proc_get_locations(struct inode *inode,
6535 struct nfs4_fs_locations *locations,
6536 struct page *page, struct rpc_cred *cred)
6538 struct nfs_server *server = NFS_SERVER(inode);
6539 struct nfs_client *clp = server->nfs_client;
6540 const struct nfs4_mig_recovery_ops *ops =
6541 clp->cl_mvops->mig_recovery_ops;
6542 struct nfs4_exception exception = { };
6545 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6546 (unsigned long long)server->fsid.major,
6547 (unsigned long long)server->fsid.minor,
6549 nfs_display_fhandle(NFS_FH(inode), __func__);
6552 status = ops->get_locations(inode, locations, page, cred);
6553 if (status != -NFS4ERR_DELAY)
6555 nfs4_handle_exception(server, status, &exception);
6556 } while (exception.retry);
6561 * This operation also signals the server that this client is
6562 * performing "lease moved" recovery. The server can stop
6563 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6564 * is appended to this compound to identify the client ID which is
6565 * performing recovery.
6567 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6569 struct nfs_server *server = NFS_SERVER(inode);
6570 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6571 struct rpc_clnt *clnt = server->client;
6572 struct nfs4_fsid_present_arg args = {
6573 .fh = NFS_FH(inode),
6574 .clientid = clp->cl_clientid,
6575 .renew = 1, /* append RENEW */
6577 struct nfs4_fsid_present_res res = {
6580 struct rpc_message msg = {
6581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6586 unsigned long now = jiffies;
6589 res.fh = nfs_alloc_fhandle();
6593 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6594 nfs4_set_sequence_privileged(&args.seq_args);
6595 status = nfs4_call_sync_sequence(clnt, server, &msg,
6596 &args.seq_args, &res.seq_res);
6597 nfs_free_fhandle(res.fh);
6601 do_renew_lease(clp, now);
6605 #ifdef CONFIG_NFS_V4_1
6608 * This operation also signals the server that this client is
6609 * performing "lease moved" recovery. The server can stop asserting
6610 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6611 * this operation is identified in the SEQUENCE operation in this
6614 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6616 struct nfs_server *server = NFS_SERVER(inode);
6617 struct rpc_clnt *clnt = server->client;
6618 struct nfs4_fsid_present_arg args = {
6619 .fh = NFS_FH(inode),
6621 struct nfs4_fsid_present_res res = {
6623 struct rpc_message msg = {
6624 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6631 res.fh = nfs_alloc_fhandle();
6635 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6636 nfs4_set_sequence_privileged(&args.seq_args);
6637 status = nfs4_call_sync_sequence(clnt, server, &msg,
6638 &args.seq_args, &res.seq_res);
6639 nfs_free_fhandle(res.fh);
6640 if (status == NFS4_OK &&
6641 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6642 status = -NFS4ERR_LEASE_MOVED;
6646 #endif /* CONFIG_NFS_V4_1 */
6649 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6650 * @inode: inode on FSID to check
6651 * @cred: credential to use for this operation
6653 * Server indicates whether the FSID is present, moved, or not
6654 * recognized. This operation is necessary to clear a LEASE_MOVED
6655 * condition for this client ID.
6657 * Returns NFS4_OK if the FSID is present on this server,
6658 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6659 * NFS4ERR code if some error occurred on the server, or a
6660 * negative errno if a local failure occurred.
6662 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6664 struct nfs_server *server = NFS_SERVER(inode);
6665 struct nfs_client *clp = server->nfs_client;
6666 const struct nfs4_mig_recovery_ops *ops =
6667 clp->cl_mvops->mig_recovery_ops;
6668 struct nfs4_exception exception = { };
6671 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6672 (unsigned long long)server->fsid.major,
6673 (unsigned long long)server->fsid.minor,
6675 nfs_display_fhandle(NFS_FH(inode), __func__);
6678 status = ops->fsid_present(inode, cred);
6679 if (status != -NFS4ERR_DELAY)
6681 nfs4_handle_exception(server, status, &exception);
6682 } while (exception.retry);
6687 * If 'use_integrity' is true and the state managment nfs_client
6688 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6689 * and the machine credential as per RFC3530bis and RFC5661 Security
6690 * Considerations sections. Otherwise, just use the user cred with the
6691 * filesystem's rpc_client.
6693 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
6696 struct nfs4_secinfo_arg args = {
6697 .dir_fh = NFS_FH(dir),
6700 struct nfs4_secinfo_res res = {
6703 struct rpc_message msg = {
6704 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6708 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
6709 struct rpc_cred *cred = NULL;
6711 if (use_integrity) {
6712 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
6713 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6714 msg.rpc_cred = cred;
6717 dprintk("NFS call secinfo %s\n", name->name);
6719 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6720 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6722 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6724 dprintk("NFS reply secinfo: %d\n", status);
6732 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6733 struct nfs4_secinfo_flavors *flavors)
6735 struct nfs4_exception exception = { };
6738 err = -NFS4ERR_WRONGSEC;
6740 /* try to use integrity protection with machine cred */
6741 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6742 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6745 * if unable to use integrity protection, or SECINFO with
6746 * integrity protection returns NFS4ERR_WRONGSEC (which is
6747 * disallowed by spec, but exists in deployed servers) use
6748 * the current filesystem's rpc_client and the user cred.
6750 if (err == -NFS4ERR_WRONGSEC)
6751 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6753 trace_nfs4_secinfo(dir, name, err);
6754 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6756 } while (exception.retry);
6760 #ifdef CONFIG_NFS_V4_1
6762 * Check the exchange flags returned by the server for invalid flags, having
6763 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6766 static int nfs4_check_cl_exchange_flags(u32 flags)
6768 if (flags & ~EXCHGID4_FLAG_MASK_R)
6770 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6771 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6773 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6777 return -NFS4ERR_INVAL;
6781 nfs41_same_server_scope(struct nfs41_server_scope *a,
6782 struct nfs41_server_scope *b)
6784 if (a->server_scope_sz == b->server_scope_sz &&
6785 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6792 * nfs4_proc_bind_conn_to_session()
6794 * The 4.1 client currently uses the same TCP connection for the
6795 * fore and backchannel.
6797 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6800 struct nfs41_bind_conn_to_session_args args = {
6802 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6804 struct nfs41_bind_conn_to_session_res res;
6805 struct rpc_message msg = {
6807 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6813 dprintk("--> %s\n", __func__);
6815 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6816 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6817 args.dir = NFS4_CDFC4_FORE;
6819 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6820 trace_nfs4_bind_conn_to_session(clp, status);
6822 if (memcmp(res.sessionid.data,
6823 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6824 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6828 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
6829 dprintk("NFS: %s: Unexpected direction from server\n",
6834 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
6835 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6842 dprintk("<-- %s status= %d\n", __func__, status);
6847 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6848 * and operations we'd like to see to enable certain features in the allow map
6850 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6851 .how = SP4_MACH_CRED,
6852 .enforce.u.words = {
6853 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6854 1 << (OP_EXCHANGE_ID - 32) |
6855 1 << (OP_CREATE_SESSION - 32) |
6856 1 << (OP_DESTROY_SESSION - 32) |
6857 1 << (OP_DESTROY_CLIENTID - 32)
6860 [0] = 1 << (OP_CLOSE) |
6863 [1] = 1 << (OP_SECINFO - 32) |
6864 1 << (OP_SECINFO_NO_NAME - 32) |
6865 1 << (OP_TEST_STATEID - 32) |
6866 1 << (OP_FREE_STATEID - 32) |
6867 1 << (OP_WRITE - 32)
6872 * Select the state protection mode for client `clp' given the server results
6873 * from exchange_id in `sp'.
6875 * Returns 0 on success, negative errno otherwise.
6877 static int nfs4_sp4_select_mode(struct nfs_client *clp,
6878 struct nfs41_state_protection *sp)
6880 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6881 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6882 1 << (OP_EXCHANGE_ID - 32) |
6883 1 << (OP_CREATE_SESSION - 32) |
6884 1 << (OP_DESTROY_SESSION - 32) |
6885 1 << (OP_DESTROY_CLIENTID - 32)
6889 if (sp->how == SP4_MACH_CRED) {
6890 /* Print state protect result */
6891 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6892 for (i = 0; i <= LAST_NFS4_OP; i++) {
6893 if (test_bit(i, sp->enforce.u.longs))
6894 dfprintk(MOUNT, " enforce op %d\n", i);
6895 if (test_bit(i, sp->allow.u.longs))
6896 dfprintk(MOUNT, " allow op %d\n", i);
6899 /* make sure nothing is on enforce list that isn't supported */
6900 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6901 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6902 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6908 * Minimal mode - state operations are allowed to use machine
6909 * credential. Note this already happens by default, so the
6910 * client doesn't have to do anything more than the negotiation.
6912 * NOTE: we don't care if EXCHANGE_ID is in the list -
6913 * we're already using the machine cred for exchange_id
6914 * and will never use a different cred.
6916 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6917 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6918 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6919 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6920 dfprintk(MOUNT, "sp4_mach_cred:\n");
6921 dfprintk(MOUNT, " minimal mode enabled\n");
6922 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6924 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6928 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6929 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6930 dfprintk(MOUNT, " cleanup mode enabled\n");
6931 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6934 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6935 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6936 dfprintk(MOUNT, " secinfo mode enabled\n");
6937 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6940 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6941 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6942 dfprintk(MOUNT, " stateid mode enabled\n");
6943 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6946 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6947 dfprintk(MOUNT, " write mode enabled\n");
6948 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6951 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6952 dfprintk(MOUNT, " commit mode enabled\n");
6953 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6961 * _nfs4_proc_exchange_id()
6963 * Wrapper for EXCHANGE_ID operation.
6965 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6968 nfs4_verifier verifier;
6969 struct nfs41_exchange_id_args args = {
6970 .verifier = &verifier,
6972 #ifdef CONFIG_NFS_V4_1_MIGRATION
6973 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6974 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6975 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6977 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6978 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6981 struct nfs41_exchange_id_res res = {
6985 struct rpc_message msg = {
6986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6992 nfs4_init_boot_verifier(clp, &verifier);
6994 status = nfs4_init_uniform_client_string(clp);
6998 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6999 clp->cl_rpcclient->cl_auth->au_ops->au_name,
7002 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7004 if (unlikely(res.server_owner == NULL)) {
7009 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
7011 if (unlikely(res.server_scope == NULL)) {
7013 goto out_server_owner;
7016 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7017 if (unlikely(res.impl_id == NULL)) {
7019 goto out_server_scope;
7024 args.state_protect.how = SP4_NONE;
7028 args.state_protect = nfs4_sp4_mach_cred_request;
7038 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7039 trace_nfs4_exchange_id(clp, status);
7041 status = nfs4_check_cl_exchange_flags(res.flags);
7044 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7047 clp->cl_clientid = res.clientid;
7048 clp->cl_exchange_flags = res.flags;
7049 /* Client ID is not confirmed */
7050 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7051 clear_bit(NFS4_SESSION_ESTABLISHED,
7052 &clp->cl_session->session_state);
7053 clp->cl_seqid = res.seqid;
7056 kfree(clp->cl_serverowner);
7057 clp->cl_serverowner = res.server_owner;
7058 res.server_owner = NULL;
7060 /* use the most recent implementation id */
7061 kfree(clp->cl_implid);
7062 clp->cl_implid = res.impl_id;
7065 if (clp->cl_serverscope != NULL &&
7066 !nfs41_same_server_scope(clp->cl_serverscope,
7067 res.server_scope)) {
7068 dprintk("%s: server_scope mismatch detected\n",
7070 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7071 kfree(clp->cl_serverscope);
7072 clp->cl_serverscope = NULL;
7075 if (clp->cl_serverscope == NULL) {
7076 clp->cl_serverscope = res.server_scope;
7077 res.server_scope = NULL;
7084 kfree(res.server_scope);
7086 kfree(res.server_owner);
7088 if (clp->cl_implid != NULL)
7089 dprintk("NFS reply exchange_id: Server Implementation ID: "
7090 "domain: %s, name: %s, date: %llu,%u\n",
7091 clp->cl_implid->domain, clp->cl_implid->name,
7092 clp->cl_implid->date.seconds,
7093 clp->cl_implid->date.nseconds);
7094 dprintk("NFS reply exchange_id: %d\n", status);
7099 * nfs4_proc_exchange_id()
7101 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7103 * Since the clientid has expired, all compounds using sessions
7104 * associated with the stale clientid will be returning
7105 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7106 * be in some phase of session reset.
7108 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7110 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7112 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7115 /* try SP4_MACH_CRED if krb5i/p */
7116 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7117 authflavor == RPC_AUTH_GSS_KRB5P) {
7118 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7124 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7127 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7128 struct rpc_cred *cred)
7130 struct rpc_message msg = {
7131 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7137 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7138 trace_nfs4_destroy_clientid(clp, status);
7140 dprintk("NFS: Got error %d from the server %s on "
7141 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7145 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7146 struct rpc_cred *cred)
7151 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7152 ret = _nfs4_proc_destroy_clientid(clp, cred);
7154 case -NFS4ERR_DELAY:
7155 case -NFS4ERR_CLIENTID_BUSY:
7165 int nfs4_destroy_clientid(struct nfs_client *clp)
7167 struct rpc_cred *cred;
7170 if (clp->cl_mvops->minor_version < 1)
7172 if (clp->cl_exchange_flags == 0)
7174 if (clp->cl_preserve_clid)
7176 cred = nfs4_get_clid_cred(clp);
7177 ret = nfs4_proc_destroy_clientid(clp, cred);
7182 case -NFS4ERR_STALE_CLIENTID:
7183 clp->cl_exchange_flags = 0;
7189 struct nfs4_get_lease_time_data {
7190 struct nfs4_get_lease_time_args *args;
7191 struct nfs4_get_lease_time_res *res;
7192 struct nfs_client *clp;
7195 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7198 struct nfs4_get_lease_time_data *data =
7199 (struct nfs4_get_lease_time_data *)calldata;
7201 dprintk("--> %s\n", __func__);
7202 /* just setup sequence, do not trigger session recovery
7203 since we're invoked within one */
7204 nfs41_setup_sequence(data->clp->cl_session,
7205 &data->args->la_seq_args,
7206 &data->res->lr_seq_res,
7208 dprintk("<-- %s\n", __func__);
7212 * Called from nfs4_state_manager thread for session setup, so don't recover
7213 * from sequence operation or clientid errors.
7215 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7217 struct nfs4_get_lease_time_data *data =
7218 (struct nfs4_get_lease_time_data *)calldata;
7220 dprintk("--> %s\n", __func__);
7221 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7223 switch (task->tk_status) {
7224 case -NFS4ERR_DELAY:
7225 case -NFS4ERR_GRACE:
7226 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7227 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7228 task->tk_status = 0;
7230 case -NFS4ERR_RETRY_UNCACHED_REP:
7231 rpc_restart_call_prepare(task);
7234 dprintk("<-- %s\n", __func__);
7237 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7238 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7239 .rpc_call_done = nfs4_get_lease_time_done,
7242 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7244 struct rpc_task *task;
7245 struct nfs4_get_lease_time_args args;
7246 struct nfs4_get_lease_time_res res = {
7247 .lr_fsinfo = fsinfo,
7249 struct nfs4_get_lease_time_data data = {
7254 struct rpc_message msg = {
7255 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7259 struct rpc_task_setup task_setup = {
7260 .rpc_client = clp->cl_rpcclient,
7261 .rpc_message = &msg,
7262 .callback_ops = &nfs4_get_lease_time_ops,
7263 .callback_data = &data,
7264 .flags = RPC_TASK_TIMEOUT,
7268 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7269 nfs4_set_sequence_privileged(&args.la_seq_args);
7270 dprintk("--> %s\n", __func__);
7271 task = rpc_run_task(&task_setup);
7274 status = PTR_ERR(task);
7276 status = task->tk_status;
7279 dprintk("<-- %s return %d\n", __func__, status);
7285 * Initialize the values to be used by the client in CREATE_SESSION
7286 * If nfs4_init_session set the fore channel request and response sizes,
7289 * Set the back channel max_resp_sz_cached to zero to force the client to
7290 * always set csa_cachethis to FALSE because the current implementation
7291 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7293 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7295 unsigned int max_rqst_sz, max_resp_sz;
7297 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7298 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7300 /* Fore channel attributes */
7301 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7302 args->fc_attrs.max_resp_sz = max_resp_sz;
7303 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7304 args->fc_attrs.max_reqs = max_session_slots;
7306 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7307 "max_ops=%u max_reqs=%u\n",
7309 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7310 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7312 /* Back channel attributes */
7313 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7314 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7315 args->bc_attrs.max_resp_sz_cached = 0;
7316 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7317 args->bc_attrs.max_reqs = 1;
7319 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7320 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7322 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7323 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7324 args->bc_attrs.max_reqs);
7327 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7328 struct nfs41_create_session_res *res)
7330 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7331 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
7333 if (rcvd->max_resp_sz > sent->max_resp_sz)
7336 * Our requested max_ops is the minimum we need; we're not
7337 * prepared to break up compounds into smaller pieces than that.
7338 * So, no point even trying to continue if the server won't
7341 if (rcvd->max_ops < sent->max_ops)
7343 if (rcvd->max_reqs == 0)
7345 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7346 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7350 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7351 struct nfs41_create_session_res *res)
7353 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7354 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
7356 if (!(res->flags & SESSION4_BACK_CHAN))
7358 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7360 if (rcvd->max_resp_sz < sent->max_resp_sz)
7362 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7364 /* These would render the backchannel useless: */
7365 if (rcvd->max_ops != sent->max_ops)
7367 if (rcvd->max_reqs != sent->max_reqs)
7373 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7374 struct nfs41_create_session_res *res)
7378 ret = nfs4_verify_fore_channel_attrs(args, res);
7381 return nfs4_verify_back_channel_attrs(args, res);
7384 static void nfs4_update_session(struct nfs4_session *session,
7385 struct nfs41_create_session_res *res)
7387 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7388 /* Mark client id and session as being confirmed */
7389 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7390 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
7391 session->flags = res->flags;
7392 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
7393 if (res->flags & SESSION4_BACK_CHAN)
7394 memcpy(&session->bc_attrs, &res->bc_attrs,
7395 sizeof(session->bc_attrs));
7398 static int _nfs4_proc_create_session(struct nfs_client *clp,
7399 struct rpc_cred *cred)
7401 struct nfs4_session *session = clp->cl_session;
7402 struct nfs41_create_session_args args = {
7404 .clientid = clp->cl_clientid,
7405 .seqid = clp->cl_seqid,
7406 .cb_program = NFS4_CALLBACK,
7408 struct nfs41_create_session_res res;
7410 struct rpc_message msg = {
7411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7418 nfs4_init_channel_attrs(&args);
7419 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7421 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7422 trace_nfs4_create_session(clp, status);
7425 case -NFS4ERR_STALE_CLIENTID:
7426 case -NFS4ERR_DELAY:
7435 /* Verify the session's negotiated channel_attrs values */
7436 status = nfs4_verify_channel_attrs(&args, &res);
7437 /* Increment the clientid slot sequence id */
7440 nfs4_update_session(session, &res);
7447 * Issues a CREATE_SESSION operation to the server.
7448 * It is the responsibility of the caller to verify the session is
7449 * expired before calling this routine.
7451 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7455 struct nfs4_session *session = clp->cl_session;
7457 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7459 status = _nfs4_proc_create_session(clp, cred);
7463 /* Init or reset the session slot tables */
7464 status = nfs4_setup_session_slot_tables(session);
7465 dprintk("slot table setup returned %d\n", status);
7469 ptr = (unsigned *)&session->sess_id.data[0];
7470 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7471 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7473 dprintk("<-- %s\n", __func__);
7478 * Issue the over-the-wire RPC DESTROY_SESSION.
7479 * The caller must serialize access to this routine.
7481 int nfs4_proc_destroy_session(struct nfs4_session *session,
7482 struct rpc_cred *cred)
7484 struct rpc_message msg = {
7485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7486 .rpc_argp = session,
7491 dprintk("--> nfs4_proc_destroy_session\n");
7493 /* session is still being setup */
7494 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7497 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7498 trace_nfs4_destroy_session(session->clp, status);
7501 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
7502 "Session has been destroyed regardless...\n", status);
7504 dprintk("<-- nfs4_proc_destroy_session\n");
7509 * Renew the cl_session lease.
7511 struct nfs4_sequence_data {
7512 struct nfs_client *clp;
7513 struct nfs4_sequence_args args;
7514 struct nfs4_sequence_res res;
7517 static void nfs41_sequence_release(void *data)
7519 struct nfs4_sequence_data *calldata = data;
7520 struct nfs_client *clp = calldata->clp;
7522 if (atomic_read(&clp->cl_count) > 1)
7523 nfs4_schedule_state_renewal(clp);
7524 nfs_put_client(clp);
7528 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7530 switch(task->tk_status) {
7531 case -NFS4ERR_DELAY:
7532 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7535 nfs4_schedule_lease_recovery(clp);
7540 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
7542 struct nfs4_sequence_data *calldata = data;
7543 struct nfs_client *clp = calldata->clp;
7545 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7548 trace_nfs4_sequence(clp, task->tk_status);
7549 if (task->tk_status < 0) {
7550 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7551 if (atomic_read(&clp->cl_count) == 1)
7554 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7555 rpc_restart_call_prepare(task);
7559 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7561 dprintk("<-- %s\n", __func__);
7564 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7566 struct nfs4_sequence_data *calldata = data;
7567 struct nfs_client *clp = calldata->clp;
7568 struct nfs4_sequence_args *args;
7569 struct nfs4_sequence_res *res;
7571 args = task->tk_msg.rpc_argp;
7572 res = task->tk_msg.rpc_resp;
7574 nfs41_setup_sequence(clp->cl_session, args, res, task);
7577 static const struct rpc_call_ops nfs41_sequence_ops = {
7578 .rpc_call_done = nfs41_sequence_call_done,
7579 .rpc_call_prepare = nfs41_sequence_prepare,
7580 .rpc_release = nfs41_sequence_release,
7583 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7584 struct rpc_cred *cred,
7587 struct nfs4_sequence_data *calldata;
7588 struct rpc_message msg = {
7589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7592 struct rpc_task_setup task_setup_data = {
7593 .rpc_client = clp->cl_rpcclient,
7594 .rpc_message = &msg,
7595 .callback_ops = &nfs41_sequence_ops,
7596 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7599 if (!atomic_inc_not_zero(&clp->cl_count))
7600 return ERR_PTR(-EIO);
7601 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7602 if (calldata == NULL) {
7603 nfs_put_client(clp);
7604 return ERR_PTR(-ENOMEM);
7606 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
7608 nfs4_set_sequence_privileged(&calldata->args);
7609 msg.rpc_argp = &calldata->args;
7610 msg.rpc_resp = &calldata->res;
7611 calldata->clp = clp;
7612 task_setup_data.callback_data = calldata;
7614 return rpc_run_task(&task_setup_data);
7617 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
7619 struct rpc_task *task;
7622 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7624 task = _nfs41_proc_sequence(clp, cred, false);
7626 ret = PTR_ERR(task);
7628 rpc_put_task_async(task);
7629 dprintk("<-- %s status=%d\n", __func__, ret);
7633 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7635 struct rpc_task *task;
7638 task = _nfs41_proc_sequence(clp, cred, true);
7640 ret = PTR_ERR(task);
7643 ret = rpc_wait_for_completion_task(task);
7645 ret = task->tk_status;
7648 dprintk("<-- %s status=%d\n", __func__, ret);
7652 struct nfs4_reclaim_complete_data {
7653 struct nfs_client *clp;
7654 struct nfs41_reclaim_complete_args arg;
7655 struct nfs41_reclaim_complete_res res;
7658 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7660 struct nfs4_reclaim_complete_data *calldata = data;
7662 nfs41_setup_sequence(calldata->clp->cl_session,
7663 &calldata->arg.seq_args,
7664 &calldata->res.seq_res,
7668 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7670 switch(task->tk_status) {
7672 case -NFS4ERR_COMPLETE_ALREADY:
7673 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7675 case -NFS4ERR_DELAY:
7676 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7678 case -NFS4ERR_RETRY_UNCACHED_REP:
7681 nfs4_schedule_lease_recovery(clp);
7686 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7688 struct nfs4_reclaim_complete_data *calldata = data;
7689 struct nfs_client *clp = calldata->clp;
7690 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7692 dprintk("--> %s\n", __func__);
7693 if (!nfs41_sequence_done(task, res))
7696 trace_nfs4_reclaim_complete(clp, task->tk_status);
7697 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7698 rpc_restart_call_prepare(task);
7701 dprintk("<-- %s\n", __func__);
7704 static void nfs4_free_reclaim_complete_data(void *data)
7706 struct nfs4_reclaim_complete_data *calldata = data;
7711 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7712 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7713 .rpc_call_done = nfs4_reclaim_complete_done,
7714 .rpc_release = nfs4_free_reclaim_complete_data,
7718 * Issue a global reclaim complete.
7720 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7721 struct rpc_cred *cred)
7723 struct nfs4_reclaim_complete_data *calldata;
7724 struct rpc_task *task;
7725 struct rpc_message msg = {
7726 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
7729 struct rpc_task_setup task_setup_data = {
7730 .rpc_client = clp->cl_rpcclient,
7731 .rpc_message = &msg,
7732 .callback_ops = &nfs4_reclaim_complete_call_ops,
7733 .flags = RPC_TASK_ASYNC,
7735 int status = -ENOMEM;
7737 dprintk("--> %s\n", __func__);
7738 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7739 if (calldata == NULL)
7741 calldata->clp = clp;
7742 calldata->arg.one_fs = 0;
7744 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
7745 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
7746 msg.rpc_argp = &calldata->arg;
7747 msg.rpc_resp = &calldata->res;
7748 task_setup_data.callback_data = calldata;
7749 task = rpc_run_task(&task_setup_data);
7751 status = PTR_ERR(task);
7754 status = nfs4_wait_for_completion_rpc_task(task);
7756 status = task->tk_status;
7760 dprintk("<-- %s status=%d\n", __func__, status);
7765 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7767 struct nfs4_layoutget *lgp = calldata;
7768 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
7769 struct nfs4_session *session = nfs4_get_session(server);
7771 dprintk("--> %s\n", __func__);
7772 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7773 * right now covering the LAYOUTGET we are about to send.
7774 * However, that is not so catastrophic, and there seems
7775 * to be no way to prevent it completely.
7777 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
7778 &lgp->res.seq_res, task))
7780 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7781 NFS_I(lgp->args.inode)->layout,
7783 lgp->args.ctx->state)) {
7784 rpc_exit(task, NFS4_OK);
7788 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7790 struct nfs4_layoutget *lgp = calldata;
7791 struct inode *inode = lgp->args.inode;
7792 struct nfs_server *server = NFS_SERVER(inode);
7793 struct pnfs_layout_hdr *lo;
7794 struct nfs4_state *state = NULL;
7795 unsigned long timeo, now, giveup;
7797 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
7799 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
7802 switch (task->tk_status) {
7806 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7807 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7809 case -NFS4ERR_BADLAYOUT:
7812 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7813 * (or clients) writing to the same RAID stripe except when
7814 * the minlength argument is 0 (see RFC5661 section 18.43.3).
7816 case -NFS4ERR_LAYOUTTRYLATER:
7817 if (lgp->args.minlength == 0)
7820 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7821 * existing layout before getting a new one).
7823 case -NFS4ERR_RECALLCONFLICT:
7824 timeo = rpc_get_timeout(task->tk_client);
7825 giveup = lgp->args.timestamp + timeo;
7827 if (time_after(giveup, now)) {
7828 unsigned long delay;
7831 * - Not less then NFS4_POLL_RETRY_MIN.
7832 * - One last time a jiffie before we give up
7833 * - exponential backoff (time_now minus start_attempt)
7835 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7836 min((giveup - now - 1),
7837 now - lgp->args.timestamp));
7839 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7841 rpc_delay(task, delay);
7842 /* Do not call nfs4_async_handle_error() */
7846 case -NFS4ERR_EXPIRED:
7847 case -NFS4ERR_BAD_STATEID:
7848 spin_lock(&inode->i_lock);
7849 if (nfs4_stateid_match(&lgp->args.stateid,
7850 &lgp->args.ctx->state->stateid)) {
7851 spin_unlock(&inode->i_lock);
7852 /* If the open stateid was bad, then recover it. */
7853 state = lgp->args.ctx->state;
7856 lo = NFS_I(inode)->layout;
7857 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7858 &lo->plh_stateid)) {
7862 * Mark the bad layout state as invalid, then retry
7863 * with the current stateid.
7865 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
7866 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7867 spin_unlock(&inode->i_lock);
7868 pnfs_free_lseg_list(&head);
7870 spin_unlock(&inode->i_lock);
7873 if (nfs4_async_handle_error(task, server, state, &lgp->timeout) == -EAGAIN)
7876 dprintk("<-- %s\n", __func__);
7879 task->tk_status = 0;
7880 rpc_restart_call_prepare(task);
7883 task->tk_status = -EOVERFLOW;
7887 static size_t max_response_pages(struct nfs_server *server)
7889 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7890 return nfs_page_array_len(0, max_resp_sz);
7893 static void nfs4_free_pages(struct page **pages, size_t size)
7900 for (i = 0; i < size; i++) {
7903 __free_page(pages[i]);
7908 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7910 struct page **pages;
7913 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7915 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7919 for (i = 0; i < size; i++) {
7920 pages[i] = alloc_page(gfp_flags);
7922 dprintk("%s: failed to allocate page\n", __func__);
7923 nfs4_free_pages(pages, size);
7931 static void nfs4_layoutget_release(void *calldata)
7933 struct nfs4_layoutget *lgp = calldata;
7934 struct inode *inode = lgp->args.inode;
7935 struct nfs_server *server = NFS_SERVER(inode);
7936 size_t max_pages = max_response_pages(server);
7938 dprintk("--> %s\n", __func__);
7939 nfs4_free_pages(lgp->args.layout.pages, max_pages);
7940 pnfs_put_layout_hdr(NFS_I(inode)->layout);
7941 put_nfs_open_context(lgp->args.ctx);
7943 dprintk("<-- %s\n", __func__);
7946 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7947 .rpc_call_prepare = nfs4_layoutget_prepare,
7948 .rpc_call_done = nfs4_layoutget_done,
7949 .rpc_release = nfs4_layoutget_release,
7952 struct pnfs_layout_segment *
7953 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
7955 struct inode *inode = lgp->args.inode;
7956 struct nfs_server *server = NFS_SERVER(inode);
7957 size_t max_pages = max_response_pages(server);
7958 struct rpc_task *task;
7959 struct rpc_message msg = {
7960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7961 .rpc_argp = &lgp->args,
7962 .rpc_resp = &lgp->res,
7963 .rpc_cred = lgp->cred,
7965 struct rpc_task_setup task_setup_data = {
7966 .rpc_client = server->client,
7967 .rpc_message = &msg,
7968 .callback_ops = &nfs4_layoutget_call_ops,
7969 .callback_data = lgp,
7970 .flags = RPC_TASK_ASYNC,
7972 struct pnfs_layout_segment *lseg = NULL;
7975 dprintk("--> %s\n", __func__);
7977 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7978 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7980 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7981 if (!lgp->args.layout.pages) {
7982 nfs4_layoutget_release(lgp);
7983 return ERR_PTR(-ENOMEM);
7985 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
7986 lgp->args.timestamp = jiffies;
7988 lgp->res.layoutp = &lgp->args.layout;
7989 lgp->res.seq_res.sr_slot = NULL;
7990 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
7992 task = rpc_run_task(&task_setup_data);
7994 return ERR_CAST(task);
7995 status = nfs4_wait_for_completion_rpc_task(task);
7997 status = task->tk_status;
7998 trace_nfs4_layoutget(lgp->args.ctx,
8002 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8003 if (status == 0 && lgp->res.layoutp->len)
8004 lseg = pnfs_layout_process(lgp);
8006 dprintk("<-- %s status=%d\n", __func__, status);
8008 return ERR_PTR(status);
8013 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8015 struct nfs4_layoutreturn *lrp = calldata;
8017 dprintk("--> %s\n", __func__);
8018 nfs41_setup_sequence(lrp->clp->cl_session,
8019 &lrp->args.seq_args,
8024 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8026 struct nfs4_layoutreturn *lrp = calldata;
8027 struct nfs_server *server;
8029 dprintk("--> %s\n", __func__);
8031 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
8034 server = NFS_SERVER(lrp->args.inode);
8035 switch (task->tk_status) {
8037 task->tk_status = 0;
8040 case -NFS4ERR_DELAY:
8041 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
8043 rpc_restart_call_prepare(task);
8046 dprintk("<-- %s\n", __func__);
8049 static void nfs4_layoutreturn_release(void *calldata)
8051 struct nfs4_layoutreturn *lrp = calldata;
8052 struct pnfs_layout_hdr *lo = lrp->args.layout;
8055 dprintk("--> %s\n", __func__);
8056 spin_lock(&lo->plh_inode->i_lock);
8057 if (lrp->res.lrs_present)
8058 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
8059 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
8060 pnfs_clear_layoutreturn_waitbit(lo);
8061 spin_unlock(&lo->plh_inode->i_lock);
8062 pnfs_free_lseg_list(&freeme);
8063 pnfs_put_layout_hdr(lrp->args.layout);
8064 nfs_iput_and_deactive(lrp->inode);
8066 dprintk("<-- %s\n", __func__);
8069 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8070 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8071 .rpc_call_done = nfs4_layoutreturn_done,
8072 .rpc_release = nfs4_layoutreturn_release,
8075 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
8077 struct rpc_task *task;
8078 struct rpc_message msg = {
8079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8080 .rpc_argp = &lrp->args,
8081 .rpc_resp = &lrp->res,
8082 .rpc_cred = lrp->cred,
8084 struct rpc_task_setup task_setup_data = {
8085 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
8086 .rpc_message = &msg,
8087 .callback_ops = &nfs4_layoutreturn_call_ops,
8088 .callback_data = lrp,
8092 dprintk("--> %s\n", __func__);
8094 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8096 nfs4_layoutreturn_release(lrp);
8099 task_setup_data.flags |= RPC_TASK_ASYNC;
8101 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
8102 task = rpc_run_task(&task_setup_data);
8104 return PTR_ERR(task);
8106 status = task->tk_status;
8107 trace_nfs4_layoutreturn(lrp->args.inode, status);
8108 dprintk("<-- %s status=%d\n", __func__, status);
8114 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
8115 struct pnfs_device *pdev,
8116 struct rpc_cred *cred)
8118 struct nfs4_getdeviceinfo_args args = {
8120 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8121 NOTIFY_DEVICEID4_DELETE,
8123 struct nfs4_getdeviceinfo_res res = {
8126 struct rpc_message msg = {
8127 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8134 dprintk("--> %s\n", __func__);
8135 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
8136 if (res.notification & ~args.notify_types)
8137 dprintk("%s: unsupported notification\n", __func__);
8138 if (res.notification != args.notify_types)
8141 dprintk("<-- %s status=%d\n", __func__, status);
8146 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8147 struct pnfs_device *pdev,
8148 struct rpc_cred *cred)
8150 struct nfs4_exception exception = { };
8154 err = nfs4_handle_exception(server,
8155 _nfs4_proc_getdeviceinfo(server, pdev, cred),
8157 } while (exception.retry);
8160 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8162 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8164 struct nfs4_layoutcommit_data *data = calldata;
8165 struct nfs_server *server = NFS_SERVER(data->args.inode);
8166 struct nfs4_session *session = nfs4_get_session(server);
8168 nfs41_setup_sequence(session,
8169 &data->args.seq_args,
8175 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8177 struct nfs4_layoutcommit_data *data = calldata;
8178 struct nfs_server *server = NFS_SERVER(data->args.inode);
8180 if (!nfs41_sequence_done(task, &data->res.seq_res))
8183 switch (task->tk_status) { /* Just ignore these failures */
8184 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8185 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8186 case -NFS4ERR_BADLAYOUT: /* no layout */
8187 case -NFS4ERR_GRACE: /* loca_recalim always false */
8188 task->tk_status = 0;
8192 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8193 rpc_restart_call_prepare(task);
8199 static void nfs4_layoutcommit_release(void *calldata)
8201 struct nfs4_layoutcommit_data *data = calldata;
8203 pnfs_cleanup_layoutcommit(data);
8204 nfs_post_op_update_inode_force_wcc(data->args.inode,
8206 put_rpccred(data->cred);
8207 nfs_iput_and_deactive(data->inode);
8211 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8212 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8213 .rpc_call_done = nfs4_layoutcommit_done,
8214 .rpc_release = nfs4_layoutcommit_release,
8218 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8220 struct rpc_message msg = {
8221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8222 .rpc_argp = &data->args,
8223 .rpc_resp = &data->res,
8224 .rpc_cred = data->cred,
8226 struct rpc_task_setup task_setup_data = {
8227 .task = &data->task,
8228 .rpc_client = NFS_CLIENT(data->args.inode),
8229 .rpc_message = &msg,
8230 .callback_ops = &nfs4_layoutcommit_ops,
8231 .callback_data = data,
8233 struct rpc_task *task;
8236 dprintk("NFS: initiating layoutcommit call. sync %d "
8237 "lbw: %llu inode %lu\n", sync,
8238 data->args.lastbytewritten,
8239 data->args.inode->i_ino);
8242 data->inode = nfs_igrab_and_active(data->args.inode);
8243 if (data->inode == NULL) {
8244 nfs4_layoutcommit_release(data);
8247 task_setup_data.flags = RPC_TASK_ASYNC;
8249 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8250 task = rpc_run_task(&task_setup_data);
8252 return PTR_ERR(task);
8254 status = task->tk_status;
8255 trace_nfs4_layoutcommit(data->args.inode, status);
8256 dprintk("%s: status %d\n", __func__, status);
8262 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8263 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8266 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8267 struct nfs_fsinfo *info,
8268 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8270 struct nfs41_secinfo_no_name_args args = {
8271 .style = SECINFO_STYLE_CURRENT_FH,
8273 struct nfs4_secinfo_res res = {
8276 struct rpc_message msg = {
8277 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8281 struct rpc_clnt *clnt = server->client;
8282 struct rpc_cred *cred = NULL;
8285 if (use_integrity) {
8286 clnt = server->nfs_client->cl_rpcclient;
8287 cred = nfs4_get_clid_cred(server->nfs_client);
8288 msg.rpc_cred = cred;
8291 dprintk("--> %s\n", __func__);
8292 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8294 dprintk("<-- %s status=%d\n", __func__, status);
8303 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8304 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8306 struct nfs4_exception exception = { };
8309 /* first try using integrity protection */
8310 err = -NFS4ERR_WRONGSEC;
8312 /* try to use integrity protection with machine cred */
8313 if (_nfs4_is_integrity_protected(server->nfs_client))
8314 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8318 * if unable to use integrity protection, or SECINFO with
8319 * integrity protection returns NFS4ERR_WRONGSEC (which is
8320 * disallowed by spec, but exists in deployed servers) use
8321 * the current filesystem's rpc_client and the user cred.
8323 if (err == -NFS4ERR_WRONGSEC)
8324 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8329 case -NFS4ERR_WRONGSEC:
8333 err = nfs4_handle_exception(server, err, &exception);
8335 } while (exception.retry);
8341 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8342 struct nfs_fsinfo *info)
8346 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8347 struct nfs4_secinfo_flavors *flavors;
8348 struct nfs4_secinfo4 *secinfo;
8351 page = alloc_page(GFP_KERNEL);
8357 flavors = page_address(page);
8358 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8361 * Fall back on "guess and check" method if
8362 * the server doesn't support SECINFO_NO_NAME
8364 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8365 err = nfs4_find_root_sec(server, fhandle, info);
8371 for (i = 0; i < flavors->num_flavors; i++) {
8372 secinfo = &flavors->flavors[i];
8374 switch (secinfo->flavor) {
8378 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8379 &secinfo->flavor_info);
8382 flavor = RPC_AUTH_MAXFLAVOR;
8386 if (!nfs_auth_info_match(&server->auth_info, flavor))
8387 flavor = RPC_AUTH_MAXFLAVOR;
8389 if (flavor != RPC_AUTH_MAXFLAVOR) {
8390 err = nfs4_lookup_root_sec(server, fhandle,
8397 if (flavor == RPC_AUTH_MAXFLAVOR)
8408 static int _nfs41_test_stateid(struct nfs_server *server,
8409 nfs4_stateid *stateid,
8410 struct rpc_cred *cred)
8413 struct nfs41_test_stateid_args args = {
8416 struct nfs41_test_stateid_res res;
8417 struct rpc_message msg = {
8418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8423 struct rpc_clnt *rpc_client = server->client;
8425 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8428 dprintk("NFS call test_stateid %p\n", stateid);
8429 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8430 nfs4_set_sequence_privileged(&args.seq_args);
8431 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8432 &args.seq_args, &res.seq_res);
8433 if (status != NFS_OK) {
8434 dprintk("NFS reply test_stateid: failed, %d\n", status);
8437 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8442 * nfs41_test_stateid - perform a TEST_STATEID operation
8444 * @server: server / transport on which to perform the operation
8445 * @stateid: state ID to test
8448 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8449 * Otherwise a negative NFS4ERR value is returned if the operation
8450 * failed or the state ID is not currently valid.
8452 static int nfs41_test_stateid(struct nfs_server *server,
8453 nfs4_stateid *stateid,
8454 struct rpc_cred *cred)
8456 struct nfs4_exception exception = { };
8459 err = _nfs41_test_stateid(server, stateid, cred);
8460 if (err != -NFS4ERR_DELAY)
8462 nfs4_handle_exception(server, err, &exception);
8463 } while (exception.retry);
8467 struct nfs_free_stateid_data {
8468 struct nfs_server *server;
8469 struct nfs41_free_stateid_args args;
8470 struct nfs41_free_stateid_res res;
8473 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8475 struct nfs_free_stateid_data *data = calldata;
8476 nfs41_setup_sequence(nfs4_get_session(data->server),
8477 &data->args.seq_args,
8482 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8484 struct nfs_free_stateid_data *data = calldata;
8486 nfs41_sequence_done(task, &data->res.seq_res);
8488 switch (task->tk_status) {
8489 case -NFS4ERR_DELAY:
8490 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
8491 rpc_restart_call_prepare(task);
8495 static void nfs41_free_stateid_release(void *calldata)
8500 static const struct rpc_call_ops nfs41_free_stateid_ops = {
8501 .rpc_call_prepare = nfs41_free_stateid_prepare,
8502 .rpc_call_done = nfs41_free_stateid_done,
8503 .rpc_release = nfs41_free_stateid_release,
8506 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8507 nfs4_stateid *stateid,
8508 struct rpc_cred *cred,
8511 struct rpc_message msg = {
8512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
8515 struct rpc_task_setup task_setup = {
8516 .rpc_client = server->client,
8517 .rpc_message = &msg,
8518 .callback_ops = &nfs41_free_stateid_ops,
8519 .flags = RPC_TASK_ASYNC,
8521 struct nfs_free_stateid_data *data;
8523 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8524 &task_setup.rpc_client, &msg);
8526 dprintk("NFS call free_stateid %p\n", stateid);
8527 data = kmalloc(sizeof(*data), GFP_NOFS);
8529 return ERR_PTR(-ENOMEM);
8530 data->server = server;
8531 nfs4_stateid_copy(&data->args.stateid, stateid);
8533 task_setup.callback_data = data;
8535 msg.rpc_argp = &data->args;
8536 msg.rpc_resp = &data->res;
8537 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
8539 nfs4_set_sequence_privileged(&data->args.seq_args);
8541 return rpc_run_task(&task_setup);
8545 * nfs41_free_stateid - perform a FREE_STATEID operation
8547 * @server: server / transport on which to perform the operation
8548 * @stateid: state ID to release
8551 * Returns NFS_OK if the server freed "stateid". Otherwise a
8552 * negative NFS4ERR value is returned.
8554 static int nfs41_free_stateid(struct nfs_server *server,
8555 nfs4_stateid *stateid,
8556 struct rpc_cred *cred)
8558 struct rpc_task *task;
8561 task = _nfs41_free_stateid(server, stateid, cred, true);
8563 return PTR_ERR(task);
8564 ret = rpc_wait_for_completion_task(task);
8566 ret = task->tk_status;
8572 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8574 struct rpc_task *task;
8575 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
8577 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
8578 nfs4_free_lock_state(server, lsp);
8584 static bool nfs41_match_stateid(const nfs4_stateid *s1,
8585 const nfs4_stateid *s2)
8587 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
8590 if (s1->seqid == s2->seqid)
8592 if (s1->seqid == 0 || s2->seqid == 0)
8598 #endif /* CONFIG_NFS_V4_1 */
8600 static bool nfs4_match_stateid(const nfs4_stateid *s1,
8601 const nfs4_stateid *s2)
8603 return nfs4_stateid_match(s1, s2);
8607 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
8608 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8609 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8610 .recover_open = nfs4_open_reclaim,
8611 .recover_lock = nfs4_lock_reclaim,
8612 .establish_clid = nfs4_init_clientid,
8613 .detect_trunking = nfs40_discover_server_trunking,
8616 #if defined(CONFIG_NFS_V4_1)
8617 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
8618 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8619 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8620 .recover_open = nfs4_open_reclaim,
8621 .recover_lock = nfs4_lock_reclaim,
8622 .establish_clid = nfs41_init_clientid,
8623 .reclaim_complete = nfs41_proc_reclaim_complete,
8624 .detect_trunking = nfs41_discover_server_trunking,
8626 #endif /* CONFIG_NFS_V4_1 */
8628 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
8629 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8630 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8631 .recover_open = nfs40_open_expired,
8632 .recover_lock = nfs4_lock_expired,
8633 .establish_clid = nfs4_init_clientid,
8636 #if defined(CONFIG_NFS_V4_1)
8637 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
8638 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8639 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8640 .recover_open = nfs41_open_expired,
8641 .recover_lock = nfs41_lock_expired,
8642 .establish_clid = nfs41_init_clientid,
8644 #endif /* CONFIG_NFS_V4_1 */
8646 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
8647 .sched_state_renewal = nfs4_proc_async_renew,
8648 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8649 .renew_lease = nfs4_proc_renew,
8652 #if defined(CONFIG_NFS_V4_1)
8653 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
8654 .sched_state_renewal = nfs41_proc_async_sequence,
8655 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8656 .renew_lease = nfs4_proc_sequence,
8660 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
8661 .get_locations = _nfs40_proc_get_locations,
8662 .fsid_present = _nfs40_proc_fsid_present,
8665 #if defined(CONFIG_NFS_V4_1)
8666 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
8667 .get_locations = _nfs41_proc_get_locations,
8668 .fsid_present = _nfs41_proc_fsid_present,
8670 #endif /* CONFIG_NFS_V4_1 */
8672 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8674 .init_caps = NFS_CAP_READDIRPLUS
8675 | NFS_CAP_ATOMIC_OPEN
8676 | NFS_CAP_POSIX_LOCK,
8677 .init_client = nfs40_init_client,
8678 .shutdown_client = nfs40_shutdown_client,
8679 .match_stateid = nfs4_match_stateid,
8680 .find_root_sec = nfs4_find_root_sec,
8681 .free_lock_state = nfs4_release_lockowner,
8682 .alloc_seqid = nfs_alloc_seqid,
8683 .call_sync_ops = &nfs40_call_sync_ops,
8684 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8685 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8686 .state_renewal_ops = &nfs40_state_renewal_ops,
8687 .mig_recovery_ops = &nfs40_mig_recovery_ops,
8690 #if defined(CONFIG_NFS_V4_1)
8691 static struct nfs_seqid *
8692 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8697 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8699 .init_caps = NFS_CAP_READDIRPLUS
8700 | NFS_CAP_ATOMIC_OPEN
8701 | NFS_CAP_POSIX_LOCK
8702 | NFS_CAP_STATEID_NFSV41
8703 | NFS_CAP_ATOMIC_OPEN_V1,
8704 .init_client = nfs41_init_client,
8705 .shutdown_client = nfs41_shutdown_client,
8706 .match_stateid = nfs41_match_stateid,
8707 .find_root_sec = nfs41_find_root_sec,
8708 .free_lock_state = nfs41_free_lock_state,
8709 .alloc_seqid = nfs_alloc_no_seqid,
8710 .call_sync_ops = &nfs41_call_sync_ops,
8711 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8712 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8713 .state_renewal_ops = &nfs41_state_renewal_ops,
8714 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8718 #if defined(CONFIG_NFS_V4_2)
8719 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8721 .init_caps = NFS_CAP_READDIRPLUS
8722 | NFS_CAP_ATOMIC_OPEN
8723 | NFS_CAP_POSIX_LOCK
8724 | NFS_CAP_STATEID_NFSV41
8725 | NFS_CAP_ATOMIC_OPEN_V1
8727 | NFS_CAP_DEALLOCATE
8729 | NFS_CAP_LAYOUTSTATS
8731 .init_client = nfs41_init_client,
8732 .shutdown_client = nfs41_shutdown_client,
8733 .match_stateid = nfs41_match_stateid,
8734 .find_root_sec = nfs41_find_root_sec,
8735 .free_lock_state = nfs41_free_lock_state,
8736 .call_sync_ops = &nfs41_call_sync_ops,
8737 .alloc_seqid = nfs_alloc_no_seqid,
8738 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8739 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8740 .state_renewal_ops = &nfs41_state_renewal_ops,
8741 .mig_recovery_ops = &nfs41_mig_recovery_ops,
8745 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8746 [0] = &nfs_v4_0_minor_ops,
8747 #if defined(CONFIG_NFS_V4_1)
8748 [1] = &nfs_v4_1_minor_ops,
8750 #if defined(CONFIG_NFS_V4_2)
8751 [2] = &nfs_v4_2_minor_ops,
8755 static const struct inode_operations nfs4_dir_inode_operations = {
8756 .create = nfs_create,
8757 .lookup = nfs_lookup,
8758 .atomic_open = nfs_atomic_open,
8760 .unlink = nfs_unlink,
8761 .symlink = nfs_symlink,
8765 .rename = nfs_rename,
8766 .permission = nfs_permission,
8767 .getattr = nfs_getattr,
8768 .setattr = nfs_setattr,
8769 .getxattr = generic_getxattr,
8770 .setxattr = generic_setxattr,
8771 .listxattr = generic_listxattr,
8772 .removexattr = generic_removexattr,
8775 static const struct inode_operations nfs4_file_inode_operations = {
8776 .permission = nfs_permission,
8777 .getattr = nfs_getattr,
8778 .setattr = nfs_setattr,
8779 .getxattr = generic_getxattr,
8780 .setxattr = generic_setxattr,
8781 .listxattr = generic_listxattr,
8782 .removexattr = generic_removexattr,
8785 const struct nfs_rpc_ops nfs_v4_clientops = {
8786 .version = 4, /* protocol version */
8787 .dentry_ops = &nfs4_dentry_operations,
8788 .dir_inode_ops = &nfs4_dir_inode_operations,
8789 .file_inode_ops = &nfs4_file_inode_operations,
8790 .file_ops = &nfs4_file_operations,
8791 .getroot = nfs4_proc_get_root,
8792 .submount = nfs4_submount,
8793 .try_mount = nfs4_try_mount,
8794 .getattr = nfs4_proc_getattr,
8795 .setattr = nfs4_proc_setattr,
8796 .lookup = nfs4_proc_lookup,
8797 .access = nfs4_proc_access,
8798 .readlink = nfs4_proc_readlink,
8799 .create = nfs4_proc_create,
8800 .remove = nfs4_proc_remove,
8801 .unlink_setup = nfs4_proc_unlink_setup,
8802 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
8803 .unlink_done = nfs4_proc_unlink_done,
8804 .rename_setup = nfs4_proc_rename_setup,
8805 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
8806 .rename_done = nfs4_proc_rename_done,
8807 .link = nfs4_proc_link,
8808 .symlink = nfs4_proc_symlink,
8809 .mkdir = nfs4_proc_mkdir,
8810 .rmdir = nfs4_proc_remove,
8811 .readdir = nfs4_proc_readdir,
8812 .mknod = nfs4_proc_mknod,
8813 .statfs = nfs4_proc_statfs,
8814 .fsinfo = nfs4_proc_fsinfo,
8815 .pathconf = nfs4_proc_pathconf,
8816 .set_capabilities = nfs4_server_capabilities,
8817 .decode_dirent = nfs4_decode_dirent,
8818 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
8819 .read_setup = nfs4_proc_read_setup,
8820 .read_done = nfs4_read_done,
8821 .write_setup = nfs4_proc_write_setup,
8822 .write_done = nfs4_write_done,
8823 .commit_setup = nfs4_proc_commit_setup,
8824 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
8825 .commit_done = nfs4_commit_done,
8826 .lock = nfs4_proc_lock,
8827 .clear_acl_cache = nfs4_zap_acl_attr,
8828 .close_context = nfs4_close_context,
8829 .open_context = nfs4_atomic_open,
8830 .have_delegation = nfs4_have_delegation,
8831 .return_delegation = nfs4_inode_return_delegation,
8832 .alloc_client = nfs4_alloc_client,
8833 .init_client = nfs4_init_client,
8834 .free_client = nfs4_free_client,
8835 .create_server = nfs4_create_server,
8836 .clone_server = nfs_clone_server,
8839 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8840 .prefix = XATTR_NAME_NFSV4_ACL,
8841 .list = nfs4_xattr_list_nfs4_acl,
8842 .get = nfs4_xattr_get_nfs4_acl,
8843 .set = nfs4_xattr_set_nfs4_acl,
8846 const struct xattr_handler *nfs4_xattr_handlers[] = {
8847 &nfs4_xattr_nfs4_acl_handler,
8848 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
8849 &nfs4_xattr_nfs4_label_handler,