4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/sunrpc/gss_api.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/nfs_idmap.h>
56 #include <linux/sunrpc/bc_xprt.h>
57 #include <linux/xattr.h>
58 #include <linux/utsname.h>
59 #include <linux/freezer.h>
62 #include "delegation.h"
68 #define NFSDBG_FACILITY NFSDBG_PROC
70 #define NFS4_POLL_RETRY_MIN (HZ/10)
71 #define NFS4_POLL_RETRY_MAX (15*HZ)
73 #define NFS4_MAX_LOOP_ON_RECOVER (10)
76 static int _nfs4_proc_open(struct nfs4_opendata *data);
77 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
78 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
79 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
80 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
81 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
82 struct nfs_fattr *fattr, struct iattr *sattr,
83 struct nfs4_state *state);
84 #ifdef CONFIG_NFS_V4_1
85 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
86 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
88 /* Prevent leaks of NFSv4 errors into userland */
89 static int nfs4_map_errors(int err)
94 case -NFS4ERR_RESOURCE:
96 case -NFS4ERR_WRONGSEC:
98 case -NFS4ERR_BADOWNER:
99 case -NFS4ERR_BADNAME:
102 dprintk("%s could not handle NFSv4 error %d\n",
110 * This is our standard bitmap for GETATTR requests.
112 const u32 nfs4_fattr_bitmap[2] = {
114 | FATTR4_WORD0_CHANGE
117 | FATTR4_WORD0_FILEID,
119 | FATTR4_WORD1_NUMLINKS
121 | FATTR4_WORD1_OWNER_GROUP
122 | FATTR4_WORD1_RAWDEV
123 | FATTR4_WORD1_SPACE_USED
124 | FATTR4_WORD1_TIME_ACCESS
125 | FATTR4_WORD1_TIME_METADATA
126 | FATTR4_WORD1_TIME_MODIFY
129 const u32 nfs4_statfs_bitmap[2] = {
130 FATTR4_WORD0_FILES_AVAIL
131 | FATTR4_WORD0_FILES_FREE
132 | FATTR4_WORD0_FILES_TOTAL,
133 FATTR4_WORD1_SPACE_AVAIL
134 | FATTR4_WORD1_SPACE_FREE
135 | FATTR4_WORD1_SPACE_TOTAL
138 const u32 nfs4_pathconf_bitmap[2] = {
140 | FATTR4_WORD0_MAXNAME,
144 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
145 | FATTR4_WORD0_MAXREAD
146 | FATTR4_WORD0_MAXWRITE
147 | FATTR4_WORD0_LEASE_TIME,
148 FATTR4_WORD1_TIME_DELTA
149 | FATTR4_WORD1_FS_LAYOUT_TYPES,
150 FATTR4_WORD2_LAYOUT_BLKSIZE
153 const u32 nfs4_fs_locations_bitmap[2] = {
155 | FATTR4_WORD0_CHANGE
158 | FATTR4_WORD0_FILEID
159 | FATTR4_WORD0_FS_LOCATIONS,
161 | FATTR4_WORD1_NUMLINKS
163 | FATTR4_WORD1_OWNER_GROUP
164 | FATTR4_WORD1_RAWDEV
165 | FATTR4_WORD1_SPACE_USED
166 | FATTR4_WORD1_TIME_ACCESS
167 | FATTR4_WORD1_TIME_METADATA
168 | FATTR4_WORD1_TIME_MODIFY
169 | FATTR4_WORD1_MOUNTED_ON_FILEID
172 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
173 struct nfs4_readdir_arg *readdir)
177 BUG_ON(readdir->count < 80);
179 readdir->cookie = cookie;
180 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
185 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
190 * NFSv4 servers do not return entries for '.' and '..'
191 * Therefore, we fake these entries here. We let '.'
192 * have cookie 0 and '..' have cookie 1. Note that
193 * when talking to the server, we always send cookie 0
196 start = p = kmap_atomic(*readdir->pages, KM_USER0);
199 *p++ = xdr_one; /* next */
200 *p++ = xdr_zero; /* cookie, first word */
201 *p++ = xdr_one; /* cookie, second word */
202 *p++ = xdr_one; /* entry len */
203 memcpy(p, ".\0\0\0", 4); /* entry */
205 *p++ = xdr_one; /* bitmap length */
206 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
207 *p++ = htonl(8); /* attribute buffer length */
208 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
211 *p++ = xdr_one; /* next */
212 *p++ = xdr_zero; /* cookie, first word */
213 *p++ = xdr_two; /* cookie, second word */
214 *p++ = xdr_two; /* entry len */
215 memcpy(p, "..\0\0", 4); /* entry */
217 *p++ = xdr_one; /* bitmap length */
218 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
219 *p++ = htonl(8); /* attribute buffer length */
220 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
222 readdir->pgbase = (char *)p - (char *)start;
223 readdir->count -= readdir->pgbase;
224 kunmap_atomic(start, KM_USER0);
227 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
233 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
234 nfs_wait_bit_killable, TASK_KILLABLE);
238 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
245 *timeout = NFS4_POLL_RETRY_MIN;
246 if (*timeout > NFS4_POLL_RETRY_MAX)
247 *timeout = NFS4_POLL_RETRY_MAX;
248 freezable_schedule_timeout_killable(*timeout);
249 if (fatal_signal_pending(current))
255 /* This is the error handling routine for processes that are allowed
258 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
260 struct nfs_client *clp = server->nfs_client;
261 struct nfs4_state *state = exception->state;
264 exception->retry = 0;
268 case -NFS4ERR_ADMIN_REVOKED:
269 case -NFS4ERR_BAD_STATEID:
270 case -NFS4ERR_OPENMODE:
273 nfs4_schedule_stateid_recovery(server, state);
274 goto wait_on_recovery;
275 case -NFS4ERR_EXPIRED:
277 nfs4_schedule_stateid_recovery(server, state);
278 case -NFS4ERR_STALE_STATEID:
279 case -NFS4ERR_STALE_CLIENTID:
280 nfs4_schedule_lease_recovery(clp);
281 goto wait_on_recovery;
282 #if defined(CONFIG_NFS_V4_1)
283 case -NFS4ERR_BADSESSION:
284 case -NFS4ERR_BADSLOT:
285 case -NFS4ERR_BAD_HIGH_SLOT:
286 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
287 case -NFS4ERR_DEADSESSION:
288 case -NFS4ERR_SEQ_FALSE_RETRY:
289 case -NFS4ERR_SEQ_MISORDERED:
290 dprintk("%s ERROR: %d Reset session\n", __func__,
292 nfs4_schedule_session_recovery(clp->cl_session);
293 exception->retry = 1;
295 #endif /* defined(CONFIG_NFS_V4_1) */
296 case -NFS4ERR_FILE_OPEN:
297 if (exception->timeout > HZ) {
298 /* We have retried a decent amount, time to
307 ret = nfs4_delay(server->client, &exception->timeout);
310 case -NFS4ERR_RETRY_UNCACHED_REP:
311 case -NFS4ERR_OLD_STATEID:
312 exception->retry = 1;
314 case -NFS4ERR_BADOWNER:
315 /* The following works around a Linux server bug! */
316 case -NFS4ERR_BADNAME:
317 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
318 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
319 exception->retry = 1;
320 printk(KERN_WARNING "NFS: v4 server %s "
321 "does not accept raw "
323 "Reenabling the idmapper.\n",
324 server->nfs_client->cl_hostname);
327 /* We failed to handle the error */
328 return nfs4_map_errors(ret);
330 ret = nfs4_wait_clnt_recover(clp);
332 exception->retry = 1;
337 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
339 spin_lock(&clp->cl_lock);
340 if (time_before(clp->cl_last_renewal,timestamp))
341 clp->cl_last_renewal = timestamp;
342 spin_unlock(&clp->cl_lock);
345 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
347 do_renew_lease(server->nfs_client, timestamp);
350 #if defined(CONFIG_NFS_V4_1)
353 * nfs4_free_slot - free a slot and efficiently update slot table.
355 * freeing a slot is trivially done by clearing its respective bit
357 * If the freed slotid equals highest_used_slotid we want to update it
358 * so that the server would be able to size down the slot table if needed,
359 * otherwise we know that the highest_used_slotid is still in use.
360 * When updating highest_used_slotid there may be "holes" in the bitmap
361 * so we need to scan down from highest_used_slotid to 0 looking for the now
362 * highest slotid in use.
363 * If none found, highest_used_slotid is set to -1.
365 * Must be called while holding tbl->slot_tbl_lock
368 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
370 int slotid = free_slotid;
372 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
373 /* clear used bit in bitmap */
374 __clear_bit(slotid, tbl->used_slots);
376 /* update highest_used_slotid when it is freed */
377 if (slotid == tbl->highest_used_slotid) {
378 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
379 if (slotid < tbl->max_slots)
380 tbl->highest_used_slotid = slotid;
382 tbl->highest_used_slotid = -1;
384 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
385 free_slotid, tbl->highest_used_slotid);
388 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
390 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
395 * Signal state manager thread if session fore channel is drained
397 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
399 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
400 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
401 nfs4_set_task_privileged, NULL);
405 if (ses->fc_slot_table.highest_used_slotid != -1)
408 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
409 complete(&ses->fc_slot_table.complete);
413 * Signal state manager thread if session back channel is drained
415 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
417 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
418 ses->bc_slot_table.highest_used_slotid != -1)
420 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
421 complete(&ses->bc_slot_table.complete);
424 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
426 struct nfs4_slot_table *tbl;
428 tbl = &res->sr_session->fc_slot_table;
430 /* just wake up the next guy waiting since
431 * we may have not consumed a slot after all */
432 dprintk("%s: No slot\n", __func__);
436 spin_lock(&tbl->slot_tbl_lock);
437 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
438 nfs4_check_drain_fc_complete(res->sr_session);
439 spin_unlock(&tbl->slot_tbl_lock);
443 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
445 unsigned long timestamp;
446 struct nfs_client *clp;
449 * sr_status remains 1 if an RPC level error occurred. The server
450 * may or may not have processed the sequence operation..
451 * Proceed as if the server received and processed the sequence
454 if (res->sr_status == 1)
455 res->sr_status = NFS_OK;
457 /* don't increment the sequence number if the task wasn't sent */
458 if (!RPC_WAS_SENT(task))
461 /* Check the SEQUENCE operation status */
462 switch (res->sr_status) {
464 /* Update the slot's sequence and clientid lease timer */
465 ++res->sr_slot->seq_nr;
466 timestamp = res->sr_renewal_time;
467 clp = res->sr_session->clp;
468 do_renew_lease(clp, timestamp);
469 /* Check sequence flags */
470 if (res->sr_status_flags != 0)
471 nfs4_schedule_lease_recovery(clp);
474 /* The server detected a resend of the RPC call and
475 * returned NFS4ERR_DELAY as per Section 2.10.6.2
478 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
480 res->sr_slot - res->sr_session->fc_slot_table.slots,
481 res->sr_slot->seq_nr);
484 /* Just update the slot sequence no. */
485 ++res->sr_slot->seq_nr;
488 /* The session may be reset by one of the error handlers. */
489 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
490 nfs41_sequence_free_slot(res);
493 if (!rpc_restart_call(task))
495 rpc_delay(task, NFS4_POLL_RETRY_MAX);
499 static int nfs4_sequence_done(struct rpc_task *task,
500 struct nfs4_sequence_res *res)
502 if (res->sr_session == NULL)
504 return nfs41_sequence_done(task, res);
508 * nfs4_find_slot - efficiently look for a free slot
510 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
511 * If found, we mark the slot as used, update the highest_used_slotid,
512 * and respectively set up the sequence operation args.
513 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
515 * Note: must be called with under the slot_tbl_lock.
518 nfs4_find_slot(struct nfs4_slot_table *tbl)
521 u8 ret_id = NFS4_MAX_SLOT_TABLE;
522 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
524 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
525 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
527 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
528 if (slotid >= tbl->max_slots)
530 __set_bit(slotid, tbl->used_slots);
531 if (slotid > tbl->highest_used_slotid)
532 tbl->highest_used_slotid = slotid;
535 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
536 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
540 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
541 struct nfs4_sequence_res *res, int cache_reply)
543 args->sa_session = NULL;
544 args->sa_cache_this = 0;
546 args->sa_cache_this = 1;
547 res->sr_session = NULL;
551 int nfs41_setup_sequence(struct nfs4_session *session,
552 struct nfs4_sequence_args *args,
553 struct nfs4_sequence_res *res,
554 struct rpc_task *task)
556 struct nfs4_slot *slot;
557 struct nfs4_slot_table *tbl;
560 dprintk("--> %s\n", __func__);
561 /* slot already allocated? */
562 if (res->sr_slot != NULL)
565 tbl = &session->fc_slot_table;
567 spin_lock(&tbl->slot_tbl_lock);
568 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
569 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
570 /* The state manager will wait until the slot table is empty */
571 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
572 spin_unlock(&tbl->slot_tbl_lock);
573 dprintk("%s session is draining\n", __func__);
577 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
578 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
579 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
580 spin_unlock(&tbl->slot_tbl_lock);
581 dprintk("%s enforce FIFO order\n", __func__);
585 slotid = nfs4_find_slot(tbl);
586 if (slotid == NFS4_MAX_SLOT_TABLE) {
587 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
588 spin_unlock(&tbl->slot_tbl_lock);
589 dprintk("<-- %s: no free slots\n", __func__);
592 spin_unlock(&tbl->slot_tbl_lock);
594 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
595 slot = tbl->slots + slotid;
596 args->sa_session = session;
597 args->sa_slotid = slotid;
599 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
601 res->sr_session = session;
603 res->sr_renewal_time = jiffies;
604 res->sr_status_flags = 0;
606 * sr_status is only set in decode_sequence, and so will remain
607 * set to 1 if an rpc level failure occurs.
612 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
614 int nfs4_setup_sequence(const struct nfs_server *server,
615 struct nfs4_sequence_args *args,
616 struct nfs4_sequence_res *res,
617 struct rpc_task *task)
619 struct nfs4_session *session = nfs4_get_session(server);
625 dprintk("--> %s clp %p session %p sr_slot %td\n",
626 __func__, session->clp, session, res->sr_slot ?
627 res->sr_slot - session->fc_slot_table.slots : -1);
629 ret = nfs41_setup_sequence(session, args, res, task);
631 dprintk("<-- %s status=%d\n", __func__, ret);
635 struct nfs41_call_sync_data {
636 const struct nfs_server *seq_server;
637 struct nfs4_sequence_args *seq_args;
638 struct nfs4_sequence_res *seq_res;
641 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
643 struct nfs41_call_sync_data *data = calldata;
645 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
647 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
648 data->seq_res, task))
650 rpc_call_start(task);
653 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
655 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
656 nfs41_call_sync_prepare(task, calldata);
659 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
661 struct nfs41_call_sync_data *data = calldata;
663 nfs41_sequence_done(task, data->seq_res);
666 struct rpc_call_ops nfs41_call_sync_ops = {
667 .rpc_call_prepare = nfs41_call_sync_prepare,
668 .rpc_call_done = nfs41_call_sync_done,
671 struct rpc_call_ops nfs41_call_priv_sync_ops = {
672 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
673 .rpc_call_done = nfs41_call_sync_done,
676 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
677 struct nfs_server *server,
678 struct rpc_message *msg,
679 struct nfs4_sequence_args *args,
680 struct nfs4_sequence_res *res,
684 struct rpc_task *task;
685 struct nfs41_call_sync_data data = {
686 .seq_server = server,
690 struct rpc_task_setup task_setup = {
693 .callback_ops = &nfs41_call_sync_ops,
694 .callback_data = &data
698 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
699 task = rpc_run_task(&task_setup);
703 ret = task->tk_status;
709 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
710 struct nfs_server *server,
711 struct rpc_message *msg,
712 struct nfs4_sequence_args *args,
713 struct nfs4_sequence_res *res,
716 nfs41_init_sequence(args, res, cache_reply);
717 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
722 void nfs41_init_sequence(struct nfs4_sequence_args *args,
723 struct nfs4_sequence_res *res, int cache_reply)
727 static int nfs4_sequence_done(struct rpc_task *task,
728 struct nfs4_sequence_res *res)
732 #endif /* CONFIG_NFS_V4_1 */
734 int _nfs4_call_sync(struct rpc_clnt *clnt,
735 struct nfs_server *server,
736 struct rpc_message *msg,
737 struct nfs4_sequence_args *args,
738 struct nfs4_sequence_res *res,
741 nfs41_init_sequence(args, res, cache_reply);
742 return rpc_call_sync(clnt, msg, 0);
746 int nfs4_call_sync(struct rpc_clnt *clnt,
747 struct nfs_server *server,
748 struct rpc_message *msg,
749 struct nfs4_sequence_args *args,
750 struct nfs4_sequence_res *res,
753 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
754 args, res, cache_reply);
757 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
759 struct nfs_inode *nfsi = NFS_I(dir);
761 spin_lock(&dir->i_lock);
762 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
763 if (!cinfo->atomic || cinfo->before != dir->i_version)
764 nfs_force_lookup_revalidate(dir);
765 dir->i_version = cinfo->after;
766 spin_unlock(&dir->i_lock);
769 struct nfs4_opendata {
771 struct nfs_openargs o_arg;
772 struct nfs_openres o_res;
773 struct nfs_open_confirmargs c_arg;
774 struct nfs_open_confirmres c_res;
775 struct nfs4_string owner_name;
776 struct nfs4_string group_name;
777 struct nfs_fattr f_attr;
778 struct nfs_fattr dir_attr;
780 struct dentry *dentry;
781 struct nfs4_state_owner *owner;
782 struct nfs4_state *state;
784 unsigned long timestamp;
785 unsigned int rpc_done : 1;
791 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
793 p->o_res.f_attr = &p->f_attr;
794 p->o_res.dir_attr = &p->dir_attr;
795 p->o_res.seqid = p->o_arg.seqid;
796 p->c_res.seqid = p->c_arg.seqid;
797 p->o_res.server = p->o_arg.server;
798 nfs_fattr_init(&p->f_attr);
799 nfs_fattr_init(&p->dir_attr);
800 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
803 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
804 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
805 const struct iattr *attrs,
808 struct dentry *parent = dget_parent(dentry);
809 struct inode *dir = parent->d_inode;
810 struct nfs_server *server = NFS_SERVER(dir);
811 struct nfs4_opendata *p;
813 p = kzalloc(sizeof(*p), gfp_mask);
816 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
817 if (p->o_arg.seqid == NULL)
819 nfs_sb_active(dentry->d_sb);
820 p->dentry = dget(dentry);
823 atomic_inc(&sp->so_count);
824 p->o_arg.fh = NFS_FH(dir);
825 p->o_arg.open_flags = flags;
826 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
827 p->o_arg.clientid = server->nfs_client->cl_clientid;
828 p->o_arg.id = sp->so_seqid.owner_id;
829 p->o_arg.name = &dentry->d_name;
830 p->o_arg.server = server;
831 p->o_arg.bitmask = server->attr_bitmask;
832 p->o_arg.dir_bitmask = server->cache_consistency_bitmask;
833 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
834 if (attrs != NULL && attrs->ia_valid != 0) {
837 p->o_arg.u.attrs = &p->attrs;
838 memcpy(&p->attrs, attrs, sizeof(p->attrs));
839 s = (u32 *) p->o_arg.u.verifier.data;
843 p->c_arg.fh = &p->o_res.fh;
844 p->c_arg.stateid = &p->o_res.stateid;
845 p->c_arg.seqid = p->o_arg.seqid;
846 nfs4_init_opendata_res(p);
856 static void nfs4_opendata_free(struct kref *kref)
858 struct nfs4_opendata *p = container_of(kref,
859 struct nfs4_opendata, kref);
860 struct super_block *sb = p->dentry->d_sb;
862 nfs_free_seqid(p->o_arg.seqid);
863 if (p->state != NULL)
864 nfs4_put_open_state(p->state);
865 nfs4_put_state_owner(p->owner);
869 nfs_fattr_free_names(&p->f_attr);
873 static void nfs4_opendata_put(struct nfs4_opendata *p)
876 kref_put(&p->kref, nfs4_opendata_free);
879 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
883 ret = rpc_wait_for_completion_task(task);
887 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
891 if (open_mode & (O_EXCL|O_TRUNC))
893 switch (mode & (FMODE_READ|FMODE_WRITE)) {
895 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
896 && state->n_rdonly != 0;
899 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
900 && state->n_wronly != 0;
902 case FMODE_READ|FMODE_WRITE:
903 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
904 && state->n_rdwr != 0;
910 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
912 if (delegation == NULL)
914 if ((delegation->type & fmode) != fmode)
916 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
918 nfs_mark_delegation_referenced(delegation);
922 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
931 case FMODE_READ|FMODE_WRITE:
934 nfs4_state_set_mode_locked(state, state->state | fmode);
937 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
939 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
940 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
941 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
944 set_bit(NFS_O_RDONLY_STATE, &state->flags);
947 set_bit(NFS_O_WRONLY_STATE, &state->flags);
949 case FMODE_READ|FMODE_WRITE:
950 set_bit(NFS_O_RDWR_STATE, &state->flags);
954 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
956 write_seqlock(&state->seqlock);
957 nfs_set_open_stateid_locked(state, stateid, fmode);
958 write_sequnlock(&state->seqlock);
961 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
964 * Protect the call to nfs4_state_set_mode_locked and
965 * serialise the stateid update
967 write_seqlock(&state->seqlock);
968 if (deleg_stateid != NULL) {
969 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
970 set_bit(NFS_DELEGATED_STATE, &state->flags);
972 if (open_stateid != NULL)
973 nfs_set_open_stateid_locked(state, open_stateid, fmode);
974 write_sequnlock(&state->seqlock);
975 spin_lock(&state->owner->so_lock);
976 update_open_stateflags(state, fmode);
977 spin_unlock(&state->owner->so_lock);
980 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
982 struct nfs_inode *nfsi = NFS_I(state->inode);
983 struct nfs_delegation *deleg_cur;
986 fmode &= (FMODE_READ|FMODE_WRITE);
989 deleg_cur = rcu_dereference(nfsi->delegation);
990 if (deleg_cur == NULL)
993 spin_lock(&deleg_cur->lock);
994 if (nfsi->delegation != deleg_cur ||
995 (deleg_cur->type & fmode) != fmode)
996 goto no_delegation_unlock;
998 if (delegation == NULL)
999 delegation = &deleg_cur->stateid;
1000 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
1001 goto no_delegation_unlock;
1003 nfs_mark_delegation_referenced(deleg_cur);
1004 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1006 no_delegation_unlock:
1007 spin_unlock(&deleg_cur->lock);
1011 if (!ret && open_stateid != NULL) {
1012 __update_open_stateid(state, open_stateid, NULL, fmode);
1020 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1022 struct nfs_delegation *delegation;
1025 delegation = rcu_dereference(NFS_I(inode)->delegation);
1026 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1031 nfs_inode_return_delegation(inode);
1034 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1036 struct nfs4_state *state = opendata->state;
1037 struct nfs_inode *nfsi = NFS_I(state->inode);
1038 struct nfs_delegation *delegation;
1039 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1040 fmode_t fmode = opendata->o_arg.fmode;
1041 nfs4_stateid stateid;
1045 if (can_open_cached(state, fmode, open_mode)) {
1046 spin_lock(&state->owner->so_lock);
1047 if (can_open_cached(state, fmode, open_mode)) {
1048 update_open_stateflags(state, fmode);
1049 spin_unlock(&state->owner->so_lock);
1050 goto out_return_state;
1052 spin_unlock(&state->owner->so_lock);
1055 delegation = rcu_dereference(nfsi->delegation);
1056 if (!can_open_delegated(delegation, fmode)) {
1060 /* Save the delegation */
1061 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1063 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1068 /* Try to update the stateid using the delegation */
1069 if (update_open_stateid(state, NULL, &stateid, fmode))
1070 goto out_return_state;
1073 return ERR_PTR(ret);
1075 atomic_inc(&state->count);
1079 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1081 struct inode *inode;
1082 struct nfs4_state *state = NULL;
1083 struct nfs_delegation *delegation;
1086 if (!data->rpc_done) {
1087 state = nfs4_try_open_cached(data);
1092 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1094 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1095 ret = PTR_ERR(inode);
1099 state = nfs4_get_open_state(inode, data->owner);
1102 if (data->o_res.delegation_type != 0) {
1103 int delegation_flags = 0;
1106 delegation = rcu_dereference(NFS_I(inode)->delegation);
1108 delegation_flags = delegation->flags;
1110 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1111 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1112 "returning a delegation for "
1113 "OPEN(CLAIM_DELEGATE_CUR)\n",
1114 NFS_CLIENT(inode)->cl_server);
1115 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1116 nfs_inode_set_delegation(state->inode,
1117 data->owner->so_cred,
1120 nfs_inode_reclaim_delegation(state->inode,
1121 data->owner->so_cred,
1125 update_open_stateid(state, &data->o_res.stateid, NULL,
1133 return ERR_PTR(ret);
1136 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1138 struct nfs_inode *nfsi = NFS_I(state->inode);
1139 struct nfs_open_context *ctx;
1141 spin_lock(&state->inode->i_lock);
1142 list_for_each_entry(ctx, &nfsi->open_files, list) {
1143 if (ctx->state != state)
1145 get_nfs_open_context(ctx);
1146 spin_unlock(&state->inode->i_lock);
1149 spin_unlock(&state->inode->i_lock);
1150 return ERR_PTR(-ENOENT);
1153 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1155 struct nfs4_opendata *opendata;
1157 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1158 if (opendata == NULL)
1159 return ERR_PTR(-ENOMEM);
1160 opendata->state = state;
1161 atomic_inc(&state->count);
1165 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1167 struct nfs4_state *newstate;
1170 opendata->o_arg.open_flags = 0;
1171 opendata->o_arg.fmode = fmode;
1172 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1173 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1174 nfs4_init_opendata_res(opendata);
1175 ret = _nfs4_recover_proc_open(opendata);
1178 newstate = nfs4_opendata_to_nfs4_state(opendata);
1179 if (IS_ERR(newstate))
1180 return PTR_ERR(newstate);
1181 nfs4_close_state(newstate, fmode);
1186 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1188 struct nfs4_state *newstate;
1191 /* memory barrier prior to reading state->n_* */
1192 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1194 if (state->n_rdwr != 0) {
1195 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1196 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1199 if (newstate != state)
1202 if (state->n_wronly != 0) {
1203 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1204 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1207 if (newstate != state)
1210 if (state->n_rdonly != 0) {
1211 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1212 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1215 if (newstate != state)
1219 * We may have performed cached opens for all three recoveries.
1220 * Check if we need to update the current stateid.
1222 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1223 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1224 write_seqlock(&state->seqlock);
1225 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1226 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1227 write_sequnlock(&state->seqlock);
1234 * reclaim state on the server after a reboot.
1236 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1238 struct nfs_delegation *delegation;
1239 struct nfs4_opendata *opendata;
1240 fmode_t delegation_type = 0;
1243 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1244 if (IS_ERR(opendata))
1245 return PTR_ERR(opendata);
1246 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1247 opendata->o_arg.fh = NFS_FH(state->inode);
1249 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1250 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1251 delegation_type = delegation->type;
1253 opendata->o_arg.u.delegation_type = delegation_type;
1254 status = nfs4_open_recover(opendata, state);
1255 nfs4_opendata_put(opendata);
1259 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1261 struct nfs_server *server = NFS_SERVER(state->inode);
1262 struct nfs4_exception exception = { };
1265 err = _nfs4_do_open_reclaim(ctx, state);
1266 if (err != -NFS4ERR_DELAY)
1268 nfs4_handle_exception(server, err, &exception);
1269 } while (exception.retry);
1273 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1275 struct nfs_open_context *ctx;
1278 ctx = nfs4_state_find_open_context(state);
1280 return PTR_ERR(ctx);
1281 ret = nfs4_do_open_reclaim(ctx, state);
1282 put_nfs_open_context(ctx);
1286 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1288 struct nfs4_opendata *opendata;
1291 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1292 if (IS_ERR(opendata))
1293 return PTR_ERR(opendata);
1294 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1295 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1296 sizeof(opendata->o_arg.u.delegation.data));
1297 ret = nfs4_open_recover(opendata, state);
1298 nfs4_opendata_put(opendata);
1302 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1304 struct nfs4_exception exception = { };
1305 struct nfs_server *server = NFS_SERVER(state->inode);
1308 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1314 case -NFS4ERR_BADSESSION:
1315 case -NFS4ERR_BADSLOT:
1316 case -NFS4ERR_BAD_HIGH_SLOT:
1317 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1318 case -NFS4ERR_DEADSESSION:
1319 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1321 case -NFS4ERR_STALE_CLIENTID:
1322 case -NFS4ERR_STALE_STATEID:
1323 case -NFS4ERR_EXPIRED:
1324 /* Don't recall a delegation if it was lost */
1325 nfs4_schedule_lease_recovery(server->nfs_client);
1329 * The show must go on: exit, but mark the
1330 * stateid as needing recovery.
1332 case -NFS4ERR_ADMIN_REVOKED:
1333 case -NFS4ERR_BAD_STATEID:
1334 nfs4_schedule_stateid_recovery(server, state);
1337 * User RPCSEC_GSS context has expired.
1338 * We cannot recover this stateid now, so
1339 * skip it and allow recovery thread to
1346 err = nfs4_handle_exception(server, err, &exception);
1347 } while (exception.retry);
1352 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1354 struct nfs4_opendata *data = calldata;
1356 data->rpc_status = task->tk_status;
1357 if (data->rpc_status == 0) {
1358 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1359 sizeof(data->o_res.stateid.data));
1360 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1361 renew_lease(data->o_res.server, data->timestamp);
1366 static void nfs4_open_confirm_release(void *calldata)
1368 struct nfs4_opendata *data = calldata;
1369 struct nfs4_state *state = NULL;
1371 /* If this request hasn't been cancelled, do nothing */
1372 if (data->cancelled == 0)
1374 /* In case of error, no cleanup! */
1375 if (!data->rpc_done)
1377 state = nfs4_opendata_to_nfs4_state(data);
1379 nfs4_close_state(state, data->o_arg.fmode);
1381 nfs4_opendata_put(data);
1384 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1385 .rpc_call_done = nfs4_open_confirm_done,
1386 .rpc_release = nfs4_open_confirm_release,
1390 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1392 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1394 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1395 struct rpc_task *task;
1396 struct rpc_message msg = {
1397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1398 .rpc_argp = &data->c_arg,
1399 .rpc_resp = &data->c_res,
1400 .rpc_cred = data->owner->so_cred,
1402 struct rpc_task_setup task_setup_data = {
1403 .rpc_client = server->client,
1404 .rpc_message = &msg,
1405 .callback_ops = &nfs4_open_confirm_ops,
1406 .callback_data = data,
1407 .workqueue = nfsiod_workqueue,
1408 .flags = RPC_TASK_ASYNC,
1412 kref_get(&data->kref);
1414 data->rpc_status = 0;
1415 data->timestamp = jiffies;
1416 task = rpc_run_task(&task_setup_data);
1418 return PTR_ERR(task);
1419 status = nfs4_wait_for_completion_rpc_task(task);
1421 data->cancelled = 1;
1424 status = data->rpc_status;
1429 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1431 struct nfs4_opendata *data = calldata;
1432 struct nfs4_state_owner *sp = data->owner;
1434 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1437 * Check if we still need to send an OPEN call, or if we can use
1438 * a delegation instead.
1440 if (data->state != NULL) {
1441 struct nfs_delegation *delegation;
1443 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1446 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1447 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1448 can_open_delegated(delegation, data->o_arg.fmode))
1449 goto unlock_no_action;
1452 /* Update sequence id. */
1453 data->o_arg.id = sp->so_seqid.owner_id;
1454 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1455 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1456 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1457 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1459 data->timestamp = jiffies;
1460 if (nfs4_setup_sequence(data->o_arg.server,
1461 &data->o_arg.seq_args,
1462 &data->o_res.seq_res, task))
1464 rpc_call_start(task);
1469 task->tk_action = NULL;
1473 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1475 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1476 nfs4_open_prepare(task, calldata);
1479 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1481 struct nfs4_opendata *data = calldata;
1483 data->rpc_status = task->tk_status;
1485 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1488 if (task->tk_status == 0) {
1489 switch (data->o_res.f_attr->mode & S_IFMT) {
1493 data->rpc_status = -ELOOP;
1496 data->rpc_status = -EISDIR;
1499 data->rpc_status = -ENOTDIR;
1501 renew_lease(data->o_res.server, data->timestamp);
1502 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1503 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1508 static void nfs4_open_release(void *calldata)
1510 struct nfs4_opendata *data = calldata;
1511 struct nfs4_state *state = NULL;
1513 /* If this request hasn't been cancelled, do nothing */
1514 if (data->cancelled == 0)
1516 /* In case of error, no cleanup! */
1517 if (data->rpc_status != 0 || !data->rpc_done)
1519 /* In case we need an open_confirm, no cleanup! */
1520 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1522 state = nfs4_opendata_to_nfs4_state(data);
1524 nfs4_close_state(state, data->o_arg.fmode);
1526 nfs4_opendata_put(data);
1529 static const struct rpc_call_ops nfs4_open_ops = {
1530 .rpc_call_prepare = nfs4_open_prepare,
1531 .rpc_call_done = nfs4_open_done,
1532 .rpc_release = nfs4_open_release,
1535 static const struct rpc_call_ops nfs4_recover_open_ops = {
1536 .rpc_call_prepare = nfs4_recover_open_prepare,
1537 .rpc_call_done = nfs4_open_done,
1538 .rpc_release = nfs4_open_release,
1541 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1543 struct inode *dir = data->dir->d_inode;
1544 struct nfs_server *server = NFS_SERVER(dir);
1545 struct nfs_openargs *o_arg = &data->o_arg;
1546 struct nfs_openres *o_res = &data->o_res;
1547 struct rpc_task *task;
1548 struct rpc_message msg = {
1549 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1552 .rpc_cred = data->owner->so_cred,
1554 struct rpc_task_setup task_setup_data = {
1555 .rpc_client = server->client,
1556 .rpc_message = &msg,
1557 .callback_ops = &nfs4_open_ops,
1558 .callback_data = data,
1559 .workqueue = nfsiod_workqueue,
1560 .flags = RPC_TASK_ASYNC,
1564 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1565 kref_get(&data->kref);
1567 data->rpc_status = 0;
1568 data->cancelled = 0;
1570 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1571 task = rpc_run_task(&task_setup_data);
1573 return PTR_ERR(task);
1574 status = nfs4_wait_for_completion_rpc_task(task);
1576 data->cancelled = 1;
1579 status = data->rpc_status;
1585 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1587 struct inode *dir = data->dir->d_inode;
1588 struct nfs_openres *o_res = &data->o_res;
1591 status = nfs4_run_open_task(data, 1);
1592 if (status != 0 || !data->rpc_done)
1595 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1597 nfs_refresh_inode(dir, o_res->dir_attr);
1599 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1600 status = _nfs4_proc_open_confirm(data);
1609 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1611 static int _nfs4_proc_open(struct nfs4_opendata *data)
1613 struct inode *dir = data->dir->d_inode;
1614 struct nfs_server *server = NFS_SERVER(dir);
1615 struct nfs_openargs *o_arg = &data->o_arg;
1616 struct nfs_openres *o_res = &data->o_res;
1619 status = nfs4_run_open_task(data, 0);
1620 if (!data->rpc_done)
1623 if (status == -NFS4ERR_BADNAME &&
1624 !(o_arg->open_flags & O_CREAT))
1629 nfs_fattr_map_and_free_names(server, &data->f_attr);
1631 if (o_arg->open_flags & O_CREAT) {
1632 update_changeattr(dir, &o_res->cinfo);
1633 nfs_post_op_update_inode(dir, o_res->dir_attr);
1635 nfs_refresh_inode(dir, o_res->dir_attr);
1636 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1637 server->caps &= ~NFS_CAP_POSIX_LOCK;
1638 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1639 status = _nfs4_proc_open_confirm(data);
1643 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1644 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1648 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1653 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1654 ret = nfs4_wait_clnt_recover(clp);
1657 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1658 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1660 nfs4_schedule_state_manager(clp);
1666 static int nfs4_recover_expired_lease(struct nfs_server *server)
1668 return nfs4_client_recover_expired_lease(server->nfs_client);
1673 * reclaim state on the server after a network partition.
1674 * Assumes caller holds the appropriate lock
1676 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1678 struct nfs4_opendata *opendata;
1681 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1682 if (IS_ERR(opendata))
1683 return PTR_ERR(opendata);
1684 ret = nfs4_open_recover(opendata, state);
1686 d_drop(ctx->dentry);
1687 nfs4_opendata_put(opendata);
1691 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1693 struct nfs_server *server = NFS_SERVER(state->inode);
1694 struct nfs4_exception exception = { };
1698 err = _nfs4_open_expired(ctx, state);
1702 case -NFS4ERR_GRACE:
1703 case -NFS4ERR_DELAY:
1704 nfs4_handle_exception(server, err, &exception);
1707 } while (exception.retry);
1712 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1714 struct nfs_open_context *ctx;
1717 ctx = nfs4_state_find_open_context(state);
1719 return PTR_ERR(ctx);
1720 ret = nfs4_do_open_expired(ctx, state);
1721 put_nfs_open_context(ctx);
1725 #if defined(CONFIG_NFS_V4_1)
1726 static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
1728 int status = NFS_OK;
1729 struct nfs_server *server = NFS_SERVER(state->inode);
1731 if (state->flags & flags) {
1732 status = nfs41_test_stateid(server, stateid);
1733 if (status != NFS_OK) {
1734 nfs41_free_stateid(server, stateid);
1735 state->flags &= ~flags;
1741 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1743 int deleg_status, open_status;
1744 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1745 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1747 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1748 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1750 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1752 return nfs4_open_expired(sp, state);
1757 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1758 * fields corresponding to attributes that were used to store the verifier.
1759 * Make sure we clobber those fields in the later setattr call
1761 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1763 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1764 !(sattr->ia_valid & ATTR_ATIME_SET))
1765 sattr->ia_valid |= ATTR_ATIME;
1767 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1768 !(sattr->ia_valid & ATTR_MTIME_SET))
1769 sattr->ia_valid |= ATTR_MTIME;
1773 * Returns a referenced nfs4_state
1775 static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1777 struct nfs4_state_owner *sp;
1778 struct nfs4_state *state = NULL;
1779 struct nfs_server *server = NFS_SERVER(dir);
1780 struct nfs4_opendata *opendata;
1783 /* Protect against reboot recovery conflicts */
1785 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1787 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1790 status = nfs4_recover_expired_lease(server);
1792 goto err_put_state_owner;
1793 if (dentry->d_inode != NULL)
1794 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1796 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1797 if (opendata == NULL)
1798 goto err_put_state_owner;
1800 if (dentry->d_inode != NULL)
1801 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1803 status = _nfs4_proc_open(opendata);
1805 goto err_opendata_put;
1807 state = nfs4_opendata_to_nfs4_state(opendata);
1808 status = PTR_ERR(state);
1810 goto err_opendata_put;
1811 if (server->caps & NFS_CAP_POSIX_LOCK)
1812 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1814 if (opendata->o_arg.open_flags & O_EXCL) {
1815 nfs4_exclusive_attrset(opendata, sattr);
1817 nfs_fattr_init(opendata->o_res.f_attr);
1818 status = nfs4_do_setattr(state->inode, cred,
1819 opendata->o_res.f_attr, sattr,
1822 nfs_setattr_update_inode(state->inode, sattr);
1823 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1825 nfs4_opendata_put(opendata);
1826 nfs4_put_state_owner(sp);
1830 nfs4_opendata_put(opendata);
1831 err_put_state_owner:
1832 nfs4_put_state_owner(sp);
1839 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1841 struct nfs4_exception exception = { };
1842 struct nfs4_state *res;
1846 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1849 /* NOTE: BAD_SEQID means the server and client disagree about the
1850 * book-keeping w.r.t. state-changing operations
1851 * (OPEN/CLOSE/LOCK/LOCKU...)
1852 * It is actually a sign of a bug on the client or on the server.
1854 * If we receive a BAD_SEQID error in the particular case of
1855 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1856 * have unhashed the old state_owner for us, and that we can
1857 * therefore safely retry using a new one. We should still warn
1858 * the user though...
1860 if (status == -NFS4ERR_BAD_SEQID) {
1861 printk(KERN_WARNING "NFS: v4 server %s "
1862 " returned a bad sequence-id error!\n",
1863 NFS_SERVER(dir)->nfs_client->cl_hostname);
1864 exception.retry = 1;
1868 * BAD_STATEID on OPEN means that the server cancelled our
1869 * state before it received the OPEN_CONFIRM.
1870 * Recover by retrying the request as per the discussion
1871 * on Page 181 of RFC3530.
1873 if (status == -NFS4ERR_BAD_STATEID) {
1874 exception.retry = 1;
1877 if (status == -EAGAIN) {
1878 /* We must have found a delegation */
1879 exception.retry = 1;
1882 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1883 status, &exception));
1884 } while (exception.retry);
1888 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1889 struct nfs_fattr *fattr, struct iattr *sattr,
1890 struct nfs4_state *state)
1892 struct nfs_server *server = NFS_SERVER(inode);
1893 struct nfs_setattrargs arg = {
1894 .fh = NFS_FH(inode),
1897 .bitmask = server->attr_bitmask,
1899 struct nfs_setattrres res = {
1903 struct rpc_message msg = {
1904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1909 unsigned long timestamp = jiffies;
1912 nfs_fattr_init(fattr);
1914 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1915 /* Use that stateid */
1916 } else if (state != NULL) {
1917 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1919 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1921 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1922 if (status == 0 && state != NULL)
1923 renew_lease(server, timestamp);
1927 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1928 struct nfs_fattr *fattr, struct iattr *sattr,
1929 struct nfs4_state *state)
1931 struct nfs_server *server = NFS_SERVER(inode);
1932 struct nfs4_exception exception = { };
1935 err = nfs4_handle_exception(server,
1936 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1938 } while (exception.retry);
1942 struct nfs4_closedata {
1943 struct inode *inode;
1944 struct nfs4_state *state;
1945 struct nfs_closeargs arg;
1946 struct nfs_closeres res;
1947 struct nfs_fattr fattr;
1948 unsigned long timestamp;
1953 static void nfs4_free_closedata(void *data)
1955 struct nfs4_closedata *calldata = data;
1956 struct nfs4_state_owner *sp = calldata->state->owner;
1957 struct super_block *sb = calldata->state->inode->i_sb;
1960 pnfs_roc_release(calldata->state->inode);
1961 nfs4_put_open_state(calldata->state);
1962 nfs_free_seqid(calldata->arg.seqid);
1963 nfs4_put_state_owner(sp);
1964 nfs_sb_deactive(sb);
1968 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1971 spin_lock(&state->owner->so_lock);
1972 if (!(fmode & FMODE_READ))
1973 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1974 if (!(fmode & FMODE_WRITE))
1975 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1976 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1977 spin_unlock(&state->owner->so_lock);
1980 static void nfs4_close_done(struct rpc_task *task, void *data)
1982 struct nfs4_closedata *calldata = data;
1983 struct nfs4_state *state = calldata->state;
1984 struct nfs_server *server = NFS_SERVER(calldata->inode);
1986 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1988 /* hmm. we are done with the inode, and in the process of freeing
1989 * the state_owner. we keep this around to process errors
1991 switch (task->tk_status) {
1994 pnfs_roc_set_barrier(state->inode,
1995 calldata->roc_barrier);
1996 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1997 renew_lease(server, calldata->timestamp);
1998 nfs4_close_clear_stateid_flags(state,
1999 calldata->arg.fmode);
2001 case -NFS4ERR_STALE_STATEID:
2002 case -NFS4ERR_OLD_STATEID:
2003 case -NFS4ERR_BAD_STATEID:
2004 case -NFS4ERR_EXPIRED:
2005 if (calldata->arg.fmode == 0)
2008 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2009 rpc_restart_call_prepare(task);
2011 nfs_release_seqid(calldata->arg.seqid);
2012 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2015 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2017 struct nfs4_closedata *calldata = data;
2018 struct nfs4_state *state = calldata->state;
2021 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2024 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2025 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2026 spin_lock(&state->owner->so_lock);
2027 /* Calculate the change in open mode */
2028 if (state->n_rdwr == 0) {
2029 if (state->n_rdonly == 0) {
2030 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2031 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2032 calldata->arg.fmode &= ~FMODE_READ;
2034 if (state->n_wronly == 0) {
2035 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2036 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2037 calldata->arg.fmode &= ~FMODE_WRITE;
2040 spin_unlock(&state->owner->so_lock);
2043 /* Note: exit _without_ calling nfs4_close_done */
2044 task->tk_action = NULL;
2048 if (calldata->arg.fmode == 0) {
2049 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2050 if (calldata->roc &&
2051 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2052 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2058 nfs_fattr_init(calldata->res.fattr);
2059 calldata->timestamp = jiffies;
2060 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2061 &calldata->arg.seq_args,
2062 &calldata->res.seq_res,
2065 rpc_call_start(task);
2068 static const struct rpc_call_ops nfs4_close_ops = {
2069 .rpc_call_prepare = nfs4_close_prepare,
2070 .rpc_call_done = nfs4_close_done,
2071 .rpc_release = nfs4_free_closedata,
2075 * It is possible for data to be read/written from a mem-mapped file
2076 * after the sys_close call (which hits the vfs layer as a flush).
2077 * This means that we can't safely call nfsv4 close on a file until
2078 * the inode is cleared. This in turn means that we are not good
2079 * NFSv4 citizens - we do not indicate to the server to update the file's
2080 * share state even when we are done with one of the three share
2081 * stateid's in the inode.
2083 * NOTE: Caller must be holding the sp->so_owner semaphore!
2085 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2087 struct nfs_server *server = NFS_SERVER(state->inode);
2088 struct nfs4_closedata *calldata;
2089 struct nfs4_state_owner *sp = state->owner;
2090 struct rpc_task *task;
2091 struct rpc_message msg = {
2092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2093 .rpc_cred = state->owner->so_cred,
2095 struct rpc_task_setup task_setup_data = {
2096 .rpc_client = server->client,
2097 .rpc_message = &msg,
2098 .callback_ops = &nfs4_close_ops,
2099 .workqueue = nfsiod_workqueue,
2100 .flags = RPC_TASK_ASYNC,
2102 int status = -ENOMEM;
2104 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2105 if (calldata == NULL)
2107 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2108 calldata->inode = state->inode;
2109 calldata->state = state;
2110 calldata->arg.fh = NFS_FH(state->inode);
2111 calldata->arg.stateid = &state->open_stateid;
2112 /* Serialization for the sequence id */
2113 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2114 if (calldata->arg.seqid == NULL)
2115 goto out_free_calldata;
2116 calldata->arg.fmode = 0;
2117 calldata->arg.bitmask = server->cache_consistency_bitmask;
2118 calldata->res.fattr = &calldata->fattr;
2119 calldata->res.seqid = calldata->arg.seqid;
2120 calldata->res.server = server;
2121 calldata->roc = roc;
2122 nfs_sb_active(calldata->inode->i_sb);
2124 msg.rpc_argp = &calldata->arg;
2125 msg.rpc_resp = &calldata->res;
2126 task_setup_data.callback_data = calldata;
2127 task = rpc_run_task(&task_setup_data);
2129 return PTR_ERR(task);
2132 status = rpc_wait_for_completion_task(task);
2139 pnfs_roc_release(state->inode);
2140 nfs4_put_open_state(state);
2141 nfs4_put_state_owner(sp);
2145 static struct inode *
2146 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2148 struct nfs4_state *state;
2150 /* Protect against concurrent sillydeletes */
2151 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2153 return ERR_CAST(state);
2155 return igrab(state->inode);
2158 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2160 if (ctx->state == NULL)
2163 nfs4_close_sync(ctx->state, ctx->mode);
2165 nfs4_close_state(ctx->state, ctx->mode);
2168 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2170 struct nfs4_server_caps_arg args = {
2173 struct nfs4_server_caps_res res = {};
2174 struct rpc_message msg = {
2175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2181 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2183 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2184 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2185 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2186 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2187 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2188 NFS_CAP_CTIME|NFS_CAP_MTIME);
2189 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2190 server->caps |= NFS_CAP_ACLS;
2191 if (res.has_links != 0)
2192 server->caps |= NFS_CAP_HARDLINKS;
2193 if (res.has_symlinks != 0)
2194 server->caps |= NFS_CAP_SYMLINKS;
2195 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2196 server->caps |= NFS_CAP_FILEID;
2197 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2198 server->caps |= NFS_CAP_MODE;
2199 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2200 server->caps |= NFS_CAP_NLINK;
2201 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2202 server->caps |= NFS_CAP_OWNER;
2203 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2204 server->caps |= NFS_CAP_OWNER_GROUP;
2205 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2206 server->caps |= NFS_CAP_ATIME;
2207 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2208 server->caps |= NFS_CAP_CTIME;
2209 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2210 server->caps |= NFS_CAP_MTIME;
2212 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2213 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2214 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2215 server->acl_bitmask = res.acl_bitmask;
2221 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2223 struct nfs4_exception exception = { };
2226 err = nfs4_handle_exception(server,
2227 _nfs4_server_capabilities(server, fhandle),
2229 } while (exception.retry);
2233 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2234 struct nfs_fsinfo *info)
2236 struct nfs4_lookup_root_arg args = {
2237 .bitmask = nfs4_fattr_bitmap,
2239 struct nfs4_lookup_res res = {
2241 .fattr = info->fattr,
2244 struct rpc_message msg = {
2245 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2250 nfs_fattr_init(info->fattr);
2251 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2254 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2255 struct nfs_fsinfo *info)
2257 struct nfs4_exception exception = { };
2260 err = _nfs4_lookup_root(server, fhandle, info);
2263 case -NFS4ERR_WRONGSEC:
2266 err = nfs4_handle_exception(server, err, &exception);
2268 } while (exception.retry);
2272 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2273 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2275 struct rpc_auth *auth;
2278 auth = rpcauth_create(flavor, server->client);
2283 ret = nfs4_lookup_root(server, fhandle, info);
2288 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2289 struct nfs_fsinfo *info)
2291 int i, len, status = 0;
2292 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2294 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2295 flav_array[len] = RPC_AUTH_NULL;
2298 for (i = 0; i < len; i++) {
2299 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2300 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2305 * -EACCESS could mean that the user doesn't have correct permissions
2306 * to access the mount. It could also mean that we tried to mount
2307 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2308 * existing mount programs don't handle -EACCES very well so it should
2309 * be mapped to -EPERM instead.
2311 if (status == -EACCES)
2317 * get the file handle for the "/" directory on the server
2319 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2320 struct nfs_fsinfo *info)
2322 int minor_version = server->nfs_client->cl_minorversion;
2323 int status = nfs4_lookup_root(server, fhandle, info);
2324 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2326 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2327 * by nfs4_map_errors() as this function exits.
2329 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2331 status = nfs4_server_capabilities(server, fhandle);
2333 status = nfs4_do_fsinfo(server, fhandle, info);
2334 return nfs4_map_errors(status);
2337 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
2339 * Get locations and (maybe) other attributes of a referral.
2340 * Note that we'll actually follow the referral later when
2341 * we detect fsid mismatch in inode revalidation
2343 static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2344 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2346 int status = -ENOMEM;
2347 struct page *page = NULL;
2348 struct nfs4_fs_locations *locations = NULL;
2350 page = alloc_page(GFP_KERNEL);
2353 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2354 if (locations == NULL)
2357 status = nfs4_proc_fs_locations(dir, name, locations, page);
2360 /* Make sure server returned a different fsid for the referral */
2361 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2362 dprintk("%s: server did not return a different fsid for"
2363 " a referral at %s\n", __func__, name->name);
2367 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2368 nfs_fixup_referral_attributes(&locations->fattr);
2370 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2371 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2372 memset(fhandle, 0, sizeof(struct nfs_fh));
2380 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2382 struct nfs4_getattr_arg args = {
2384 .bitmask = server->attr_bitmask,
2386 struct nfs4_getattr_res res = {
2390 struct rpc_message msg = {
2391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2396 nfs_fattr_init(fattr);
2397 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2400 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2402 struct nfs4_exception exception = { };
2405 err = nfs4_handle_exception(server,
2406 _nfs4_proc_getattr(server, fhandle, fattr),
2408 } while (exception.retry);
2413 * The file is not closed if it is opened due to the a request to change
2414 * the size of the file. The open call will not be needed once the
2415 * VFS layer lookup-intents are implemented.
2417 * Close is called when the inode is destroyed.
2418 * If we haven't opened the file for O_WRONLY, we
2419 * need to in the size_change case to obtain a stateid.
2422 * Because OPEN is always done by name in nfsv4, it is
2423 * possible that we opened a different file by the same
2424 * name. We can recognize this race condition, but we
2425 * can't do anything about it besides returning an error.
2427 * This will be fixed with VFS changes (lookup-intent).
2430 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2431 struct iattr *sattr)
2433 struct inode *inode = dentry->d_inode;
2434 struct rpc_cred *cred = NULL;
2435 struct nfs4_state *state = NULL;
2438 if (pnfs_ld_layoutret_on_setattr(inode))
2439 pnfs_return_layout(inode);
2441 nfs_fattr_init(fattr);
2443 /* Search for an existing open(O_WRITE) file */
2444 if (sattr->ia_valid & ATTR_FILE) {
2445 struct nfs_open_context *ctx;
2447 ctx = nfs_file_open_context(sattr->ia_file);
2454 /* Deal with open(O_TRUNC) */
2455 if (sattr->ia_valid & ATTR_OPEN)
2456 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2458 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2460 nfs_setattr_update_inode(inode, sattr);
2464 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2465 const struct qstr *name, struct nfs_fh *fhandle,
2466 struct nfs_fattr *fattr)
2468 struct nfs_server *server = NFS_SERVER(dir);
2470 struct nfs4_lookup_arg args = {
2471 .bitmask = server->attr_bitmask,
2472 .dir_fh = NFS_FH(dir),
2475 struct nfs4_lookup_res res = {
2480 struct rpc_message msg = {
2481 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2486 nfs_fattr_init(fattr);
2488 dprintk("NFS call lookup %s\n", name->name);
2489 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2490 dprintk("NFS reply lookup: %d\n", status);
2494 void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2496 memset(fh, 0, sizeof(struct nfs_fh));
2497 fattr->fsid.major = 1;
2498 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2499 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2500 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2504 static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2505 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2507 struct nfs4_exception exception = { };
2512 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2514 case -NFS4ERR_BADNAME:
2516 case -NFS4ERR_MOVED:
2517 return nfs4_get_referral(dir, name, fattr, fhandle);
2518 case -NFS4ERR_WRONGSEC:
2519 nfs_fixup_secinfo_attributes(fattr, fhandle);
2521 err = nfs4_handle_exception(NFS_SERVER(dir),
2522 status, &exception);
2523 } while (exception.retry);
2527 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2529 struct nfs_server *server = NFS_SERVER(inode);
2530 struct nfs4_accessargs args = {
2531 .fh = NFS_FH(inode),
2532 .bitmask = server->cache_consistency_bitmask,
2534 struct nfs4_accessres res = {
2537 struct rpc_message msg = {
2538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2541 .rpc_cred = entry->cred,
2543 int mode = entry->mask;
2547 * Determine which access bits we want to ask for...
2549 if (mode & MAY_READ)
2550 args.access |= NFS4_ACCESS_READ;
2551 if (S_ISDIR(inode->i_mode)) {
2552 if (mode & MAY_WRITE)
2553 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2554 if (mode & MAY_EXEC)
2555 args.access |= NFS4_ACCESS_LOOKUP;
2557 if (mode & MAY_WRITE)
2558 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2559 if (mode & MAY_EXEC)
2560 args.access |= NFS4_ACCESS_EXECUTE;
2563 res.fattr = nfs_alloc_fattr();
2564 if (res.fattr == NULL)
2567 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2570 if (res.access & NFS4_ACCESS_READ)
2571 entry->mask |= MAY_READ;
2572 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2573 entry->mask |= MAY_WRITE;
2574 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2575 entry->mask |= MAY_EXEC;
2576 nfs_refresh_inode(inode, res.fattr);
2578 nfs_free_fattr(res.fattr);
2582 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2584 struct nfs4_exception exception = { };
2587 err = nfs4_handle_exception(NFS_SERVER(inode),
2588 _nfs4_proc_access(inode, entry),
2590 } while (exception.retry);
2595 * TODO: For the time being, we don't try to get any attributes
2596 * along with any of the zero-copy operations READ, READDIR,
2599 * In the case of the first three, we want to put the GETATTR
2600 * after the read-type operation -- this is because it is hard
2601 * to predict the length of a GETATTR response in v4, and thus
2602 * align the READ data correctly. This means that the GETATTR
2603 * may end up partially falling into the page cache, and we should
2604 * shift it into the 'tail' of the xdr_buf before processing.
2605 * To do this efficiently, we need to know the total length
2606 * of data received, which doesn't seem to be available outside
2609 * In the case of WRITE, we also want to put the GETATTR after
2610 * the operation -- in this case because we want to make sure
2611 * we get the post-operation mtime and size. This means that
2612 * we can't use xdr_encode_pages() as written: we need a variant
2613 * of it which would leave room in the 'tail' iovec.
2615 * Both of these changes to the XDR layer would in fact be quite
2616 * minor, but I decided to leave them for a subsequent patch.
2618 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2619 unsigned int pgbase, unsigned int pglen)
2621 struct nfs4_readlink args = {
2622 .fh = NFS_FH(inode),
2627 struct nfs4_readlink_res res;
2628 struct rpc_message msg = {
2629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2634 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2637 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2638 unsigned int pgbase, unsigned int pglen)
2640 struct nfs4_exception exception = { };
2643 err = nfs4_handle_exception(NFS_SERVER(inode),
2644 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2646 } while (exception.retry);
2652 * We will need to arrange for the VFS layer to provide an atomic open.
2653 * Until then, this create/open method is prone to inefficiency and race
2654 * conditions due to the lookup, create, and open VFS calls from sys_open()
2655 * placed on the wire.
2657 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2658 * The file will be opened again in the subsequent VFS open call
2659 * (nfs4_proc_file_open).
2661 * The open for read will just hang around to be used by any process that
2662 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2666 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2667 int flags, struct nfs_open_context *ctx)
2669 struct dentry *de = dentry;
2670 struct nfs4_state *state;
2671 struct rpc_cred *cred = NULL;
2680 sattr->ia_mode &= ~current_umask();
2681 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2683 if (IS_ERR(state)) {
2684 status = PTR_ERR(state);
2687 d_add(dentry, igrab(state->inode));
2688 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2692 nfs4_close_sync(state, fmode);
2697 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2699 struct nfs_server *server = NFS_SERVER(dir);
2700 struct nfs_removeargs args = {
2702 .name.len = name->len,
2703 .name.name = name->name,
2704 .bitmask = server->attr_bitmask,
2706 struct nfs_removeres res = {
2709 struct rpc_message msg = {
2710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2714 int status = -ENOMEM;
2716 res.dir_attr = nfs_alloc_fattr();
2717 if (res.dir_attr == NULL)
2720 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2722 update_changeattr(dir, &res.cinfo);
2723 nfs_post_op_update_inode(dir, res.dir_attr);
2725 nfs_free_fattr(res.dir_attr);
2730 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2732 struct nfs4_exception exception = { };
2735 err = nfs4_handle_exception(NFS_SERVER(dir),
2736 _nfs4_proc_remove(dir, name),
2738 } while (exception.retry);
2742 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2744 struct nfs_server *server = NFS_SERVER(dir);
2745 struct nfs_removeargs *args = msg->rpc_argp;
2746 struct nfs_removeres *res = msg->rpc_resp;
2748 args->bitmask = server->cache_consistency_bitmask;
2749 res->server = server;
2750 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2751 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2754 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2756 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2758 if (!nfs4_sequence_done(task, &res->seq_res))
2760 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2762 update_changeattr(dir, &res->cinfo);
2763 nfs_post_op_update_inode(dir, res->dir_attr);
2767 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2769 struct nfs_server *server = NFS_SERVER(dir);
2770 struct nfs_renameargs *arg = msg->rpc_argp;
2771 struct nfs_renameres *res = msg->rpc_resp;
2773 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2774 arg->bitmask = server->attr_bitmask;
2775 res->server = server;
2776 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2779 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2780 struct inode *new_dir)
2782 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2784 if (!nfs4_sequence_done(task, &res->seq_res))
2786 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2789 update_changeattr(old_dir, &res->old_cinfo);
2790 nfs_post_op_update_inode(old_dir, res->old_fattr);
2791 update_changeattr(new_dir, &res->new_cinfo);
2792 nfs_post_op_update_inode(new_dir, res->new_fattr);
2796 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2797 struct inode *new_dir, struct qstr *new_name)
2799 struct nfs_server *server = NFS_SERVER(old_dir);
2800 struct nfs_renameargs arg = {
2801 .old_dir = NFS_FH(old_dir),
2802 .new_dir = NFS_FH(new_dir),
2803 .old_name = old_name,
2804 .new_name = new_name,
2805 .bitmask = server->attr_bitmask,
2807 struct nfs_renameres res = {
2810 struct rpc_message msg = {
2811 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2815 int status = -ENOMEM;
2817 res.old_fattr = nfs_alloc_fattr();
2818 res.new_fattr = nfs_alloc_fattr();
2819 if (res.old_fattr == NULL || res.new_fattr == NULL)
2822 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2824 update_changeattr(old_dir, &res.old_cinfo);
2825 nfs_post_op_update_inode(old_dir, res.old_fattr);
2826 update_changeattr(new_dir, &res.new_cinfo);
2827 nfs_post_op_update_inode(new_dir, res.new_fattr);
2830 nfs_free_fattr(res.new_fattr);
2831 nfs_free_fattr(res.old_fattr);
2835 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2836 struct inode *new_dir, struct qstr *new_name)
2838 struct nfs4_exception exception = { };
2841 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2842 _nfs4_proc_rename(old_dir, old_name,
2845 } while (exception.retry);
2849 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2851 struct nfs_server *server = NFS_SERVER(inode);
2852 struct nfs4_link_arg arg = {
2853 .fh = NFS_FH(inode),
2854 .dir_fh = NFS_FH(dir),
2856 .bitmask = server->attr_bitmask,
2858 struct nfs4_link_res res = {
2861 struct rpc_message msg = {
2862 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2866 int status = -ENOMEM;
2868 res.fattr = nfs_alloc_fattr();
2869 res.dir_attr = nfs_alloc_fattr();
2870 if (res.fattr == NULL || res.dir_attr == NULL)
2873 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2875 update_changeattr(dir, &res.cinfo);
2876 nfs_post_op_update_inode(dir, res.dir_attr);
2877 nfs_post_op_update_inode(inode, res.fattr);
2880 nfs_free_fattr(res.dir_attr);
2881 nfs_free_fattr(res.fattr);
2885 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2887 struct nfs4_exception exception = { };
2890 err = nfs4_handle_exception(NFS_SERVER(inode),
2891 _nfs4_proc_link(inode, dir, name),
2893 } while (exception.retry);
2897 struct nfs4_createdata {
2898 struct rpc_message msg;
2899 struct nfs4_create_arg arg;
2900 struct nfs4_create_res res;
2902 struct nfs_fattr fattr;
2903 struct nfs_fattr dir_fattr;
2906 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2907 struct qstr *name, struct iattr *sattr, u32 ftype)
2909 struct nfs4_createdata *data;
2911 data = kzalloc(sizeof(*data), GFP_KERNEL);
2913 struct nfs_server *server = NFS_SERVER(dir);
2915 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2916 data->msg.rpc_argp = &data->arg;
2917 data->msg.rpc_resp = &data->res;
2918 data->arg.dir_fh = NFS_FH(dir);
2919 data->arg.server = server;
2920 data->arg.name = name;
2921 data->arg.attrs = sattr;
2922 data->arg.ftype = ftype;
2923 data->arg.bitmask = server->attr_bitmask;
2924 data->res.server = server;
2925 data->res.fh = &data->fh;
2926 data->res.fattr = &data->fattr;
2927 data->res.dir_fattr = &data->dir_fattr;
2928 nfs_fattr_init(data->res.fattr);
2929 nfs_fattr_init(data->res.dir_fattr);
2934 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2936 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2937 &data->arg.seq_args, &data->res.seq_res, 1);
2939 update_changeattr(dir, &data->res.dir_cinfo);
2940 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2941 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2946 static void nfs4_free_createdata(struct nfs4_createdata *data)
2951 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2952 struct page *page, unsigned int len, struct iattr *sattr)
2954 struct nfs4_createdata *data;
2955 int status = -ENAMETOOLONG;
2957 if (len > NFS4_MAXPATHLEN)
2961 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2965 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2966 data->arg.u.symlink.pages = &page;
2967 data->arg.u.symlink.len = len;
2969 status = nfs4_do_create(dir, dentry, data);
2971 nfs4_free_createdata(data);
2976 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2977 struct page *page, unsigned int len, struct iattr *sattr)
2979 struct nfs4_exception exception = { };
2982 err = nfs4_handle_exception(NFS_SERVER(dir),
2983 _nfs4_proc_symlink(dir, dentry, page,
2986 } while (exception.retry);
2990 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2991 struct iattr *sattr)
2993 struct nfs4_createdata *data;
2994 int status = -ENOMEM;
2996 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3000 status = nfs4_do_create(dir, dentry, data);
3002 nfs4_free_createdata(data);
3007 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3008 struct iattr *sattr)
3010 struct nfs4_exception exception = { };
3013 sattr->ia_mode &= ~current_umask();
3015 err = nfs4_handle_exception(NFS_SERVER(dir),
3016 _nfs4_proc_mkdir(dir, dentry, sattr),
3018 } while (exception.retry);
3022 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3023 u64 cookie, struct page **pages, unsigned int count, int plus)
3025 struct inode *dir = dentry->d_inode;
3026 struct nfs4_readdir_arg args = {
3031 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3034 struct nfs4_readdir_res res;
3035 struct rpc_message msg = {
3036 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3043 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3044 dentry->d_parent->d_name.name,
3045 dentry->d_name.name,
3046 (unsigned long long)cookie);
3047 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3048 res.pgbase = args.pgbase;
3049 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3051 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3052 status += args.pgbase;
3055 nfs_invalidate_atime(dir);
3057 dprintk("%s: returns %d\n", __func__, status);
3061 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3062 u64 cookie, struct page **pages, unsigned int count, int plus)
3064 struct nfs4_exception exception = { };
3067 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3068 _nfs4_proc_readdir(dentry, cred, cookie,
3069 pages, count, plus),
3071 } while (exception.retry);
3075 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3076 struct iattr *sattr, dev_t rdev)
3078 struct nfs4_createdata *data;
3079 int mode = sattr->ia_mode;
3080 int status = -ENOMEM;
3082 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3083 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3085 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3090 data->arg.ftype = NF4FIFO;
3091 else if (S_ISBLK(mode)) {
3092 data->arg.ftype = NF4BLK;
3093 data->arg.u.device.specdata1 = MAJOR(rdev);
3094 data->arg.u.device.specdata2 = MINOR(rdev);
3096 else if (S_ISCHR(mode)) {
3097 data->arg.ftype = NF4CHR;
3098 data->arg.u.device.specdata1 = MAJOR(rdev);
3099 data->arg.u.device.specdata2 = MINOR(rdev);
3102 status = nfs4_do_create(dir, dentry, data);
3104 nfs4_free_createdata(data);
3109 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3110 struct iattr *sattr, dev_t rdev)
3112 struct nfs4_exception exception = { };
3115 sattr->ia_mode &= ~current_umask();
3117 err = nfs4_handle_exception(NFS_SERVER(dir),
3118 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3120 } while (exception.retry);
3124 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3125 struct nfs_fsstat *fsstat)
3127 struct nfs4_statfs_arg args = {
3129 .bitmask = server->attr_bitmask,
3131 struct nfs4_statfs_res res = {
3134 struct rpc_message msg = {
3135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3140 nfs_fattr_init(fsstat->fattr);
3141 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3144 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3146 struct nfs4_exception exception = { };
3149 err = nfs4_handle_exception(server,
3150 _nfs4_proc_statfs(server, fhandle, fsstat),
3152 } while (exception.retry);
3156 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3157 struct nfs_fsinfo *fsinfo)
3159 struct nfs4_fsinfo_arg args = {
3161 .bitmask = server->attr_bitmask,
3163 struct nfs4_fsinfo_res res = {
3166 struct rpc_message msg = {
3167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3172 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3175 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3177 struct nfs4_exception exception = { };
3181 err = nfs4_handle_exception(server,
3182 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3184 } while (exception.retry);
3188 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3190 nfs_fattr_init(fsinfo->fattr);
3191 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3194 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3195 struct nfs_pathconf *pathconf)
3197 struct nfs4_pathconf_arg args = {
3199 .bitmask = server->attr_bitmask,
3201 struct nfs4_pathconf_res res = {
3202 .pathconf = pathconf,
3204 struct rpc_message msg = {
3205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3210 /* None of the pathconf attributes are mandatory to implement */
3211 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3212 memset(pathconf, 0, sizeof(*pathconf));
3216 nfs_fattr_init(pathconf->fattr);
3217 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3220 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3221 struct nfs_pathconf *pathconf)
3223 struct nfs4_exception exception = { };
3227 err = nfs4_handle_exception(server,
3228 _nfs4_proc_pathconf(server, fhandle, pathconf),
3230 } while (exception.retry);
3234 void __nfs4_read_done_cb(struct nfs_read_data *data)
3236 nfs_invalidate_atime(data->inode);
3239 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3241 struct nfs_server *server = NFS_SERVER(data->inode);
3243 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3244 rpc_restart_call_prepare(task);
3248 __nfs4_read_done_cb(data);
3249 if (task->tk_status > 0)
3250 renew_lease(server, data->timestamp);
3254 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3257 dprintk("--> %s\n", __func__);
3259 if (!nfs4_sequence_done(task, &data->res.seq_res))
3262 return data->read_done_cb ? data->read_done_cb(task, data) :
3263 nfs4_read_done_cb(task, data);
3266 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3268 data->timestamp = jiffies;
3269 data->read_done_cb = nfs4_read_done_cb;
3270 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3271 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3274 /* Reset the the nfs_read_data to send the read to the MDS. */
3275 void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3277 dprintk("%s Reset task for i/o through\n", __func__);
3278 put_lseg(data->lseg);
3280 /* offsets will differ in the dense stripe case */
3281 data->args.offset = data->mds_offset;
3282 data->ds_clp = NULL;
3283 data->args.fh = NFS_FH(data->inode);
3284 data->read_done_cb = nfs4_read_done_cb;
3285 task->tk_ops = data->mds_ops;
3286 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3288 EXPORT_SYMBOL_GPL(nfs4_reset_read);
3290 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3292 struct inode *inode = data->inode;
3294 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3295 rpc_restart_call_prepare(task);
3298 if (task->tk_status >= 0) {
3299 renew_lease(NFS_SERVER(inode), data->timestamp);
3300 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3305 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3307 if (!nfs4_sequence_done(task, &data->res.seq_res))
3309 return data->write_done_cb ? data->write_done_cb(task, data) :
3310 nfs4_write_done_cb(task, data);
3313 /* Reset the the nfs_write_data to send the write to the MDS. */
3314 void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3316 dprintk("%s Reset task for i/o through\n", __func__);
3317 put_lseg(data->lseg);
3319 data->ds_clp = NULL;
3320 data->write_done_cb = nfs4_write_done_cb;
3321 data->args.fh = NFS_FH(data->inode);
3322 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3323 data->args.offset = data->mds_offset;
3324 data->res.fattr = &data->fattr;
3325 task->tk_ops = data->mds_ops;
3326 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3328 EXPORT_SYMBOL_GPL(nfs4_reset_write);
3330 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3332 struct nfs_server *server = NFS_SERVER(data->inode);
3335 data->args.bitmask = NULL;
3336 data->res.fattr = NULL;
3338 data->args.bitmask = server->cache_consistency_bitmask;
3339 if (!data->write_done_cb)
3340 data->write_done_cb = nfs4_write_done_cb;
3341 data->res.server = server;
3342 data->timestamp = jiffies;
3344 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3345 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3348 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3350 struct inode *inode = data->inode;
3352 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3353 rpc_restart_call_prepare(task);
3356 nfs_refresh_inode(inode, data->res.fattr);
3360 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3362 if (!nfs4_sequence_done(task, &data->res.seq_res))
3364 return data->write_done_cb(task, data);
3367 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3369 struct nfs_server *server = NFS_SERVER(data->inode);
3372 data->args.bitmask = NULL;
3373 data->res.fattr = NULL;
3375 data->args.bitmask = server->cache_consistency_bitmask;
3376 if (!data->write_done_cb)
3377 data->write_done_cb = nfs4_commit_done_cb;
3378 data->res.server = server;
3379 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3380 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3383 struct nfs4_renewdata {
3384 struct nfs_client *client;
3385 unsigned long timestamp;
3389 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3390 * standalone procedure for queueing an asynchronous RENEW.
3392 static void nfs4_renew_release(void *calldata)
3394 struct nfs4_renewdata *data = calldata;
3395 struct nfs_client *clp = data->client;
3397 if (atomic_read(&clp->cl_count) > 1)
3398 nfs4_schedule_state_renewal(clp);
3399 nfs_put_client(clp);
3403 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3405 struct nfs4_renewdata *data = calldata;
3406 struct nfs_client *clp = data->client;
3407 unsigned long timestamp = data->timestamp;
3409 if (task->tk_status < 0) {
3410 /* Unless we're shutting down, schedule state recovery! */
3411 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3413 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3414 nfs4_schedule_lease_recovery(clp);
3417 nfs4_schedule_path_down_recovery(clp);
3419 do_renew_lease(clp, timestamp);
3422 static const struct rpc_call_ops nfs4_renew_ops = {
3423 .rpc_call_done = nfs4_renew_done,
3424 .rpc_release = nfs4_renew_release,
3427 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3429 struct rpc_message msg = {
3430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3434 struct nfs4_renewdata *data;
3436 if (renew_flags == 0)
3438 if (!atomic_inc_not_zero(&clp->cl_count))
3440 data = kmalloc(sizeof(*data), GFP_NOFS);
3444 data->timestamp = jiffies;
3445 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3446 &nfs4_renew_ops, data);
3449 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3451 struct rpc_message msg = {
3452 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3456 unsigned long now = jiffies;
3459 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3462 do_renew_lease(clp, now);
3466 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3468 return (server->caps & NFS_CAP_ACLS)
3469 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3470 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3473 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3474 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3477 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3479 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3480 struct page **pages, unsigned int *pgbase)
3482 struct page *newpage, **spages;
3488 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3489 newpage = alloc_page(GFP_KERNEL);
3491 if (newpage == NULL)
3493 memcpy(page_address(newpage), buf, len);
3498 } while (buflen != 0);
3504 __free_page(spages[rc-1]);
3508 struct nfs4_cached_acl {
3514 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3516 struct nfs_inode *nfsi = NFS_I(inode);
3518 spin_lock(&inode->i_lock);
3519 kfree(nfsi->nfs4_acl);
3520 nfsi->nfs4_acl = acl;
3521 spin_unlock(&inode->i_lock);
3524 static void nfs4_zap_acl_attr(struct inode *inode)
3526 nfs4_set_cached_acl(inode, NULL);
3529 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3531 struct nfs_inode *nfsi = NFS_I(inode);
3532 struct nfs4_cached_acl *acl;
3535 spin_lock(&inode->i_lock);
3536 acl = nfsi->nfs4_acl;
3539 if (buf == NULL) /* user is just asking for length */
3541 if (acl->cached == 0)
3543 ret = -ERANGE; /* see getxattr(2) man page */
3544 if (acl->len > buflen)
3546 memcpy(buf, acl->data, acl->len);
3550 spin_unlock(&inode->i_lock);
3554 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3556 struct nfs4_cached_acl *acl;
3558 if (buf && acl_len <= PAGE_SIZE) {
3559 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3563 memcpy(acl->data, buf, acl_len);
3565 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3572 nfs4_set_cached_acl(inode, acl);
3576 * The getxattr API returns the required buffer length when called with a
3577 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3578 * the required buf. On a NULL buf, we send a page of data to the server
3579 * guessing that the ACL request can be serviced by a page. If so, we cache
3580 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3581 * the cache. If not so, we throw away the page, and cache the required
3582 * length. The next getxattr call will then produce another round trip to
3583 * the server, this time with the input buf of the required size.
3585 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3587 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3588 struct nfs_getaclargs args = {
3589 .fh = NFS_FH(inode),
3593 struct nfs_getaclres res = {
3597 struct rpc_message msg = {
3598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3602 int ret = -ENOMEM, npages, i, acl_len = 0;
3604 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3605 /* As long as we're doing a round trip to the server anyway,
3606 * let's be prepared for a page of acl data. */
3610 for (i = 0; i < npages; i++) {
3611 pages[i] = alloc_page(GFP_KERNEL);
3616 /* for decoding across pages */
3617 args.acl_scratch = alloc_page(GFP_KERNEL);
3618 if (!args.acl_scratch)
3621 args.acl_len = npages * PAGE_SIZE;
3622 args.acl_pgbase = 0;
3623 /* Let decode_getfacl know not to fail if the ACL data is larger than
3624 * the page we send as a guess */
3626 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3627 resp_buf = page_address(pages[0]);
3629 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3630 __func__, buf, buflen, npages, args.acl_len);
3631 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3632 &msg, &args.seq_args, &res.seq_res, 0);
3636 acl_len = res.acl_len - res.acl_data_offset;
3637 if (acl_len > args.acl_len)
3638 nfs4_write_cached_acl(inode, NULL, acl_len);
3640 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3644 if (acl_len > buflen)
3646 _copy_from_pages(buf, pages, res.acl_data_offset,
3651 for (i = 0; i < npages; i++)
3653 __free_page(pages[i]);
3654 if (args.acl_scratch)
3655 __free_page(args.acl_scratch);
3659 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3661 struct nfs4_exception exception = { };
3664 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3667 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3668 } while (exception.retry);
3672 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3674 struct nfs_server *server = NFS_SERVER(inode);
3677 if (!nfs4_server_supports_acls(server))
3679 ret = nfs_revalidate_inode(server, inode);
3682 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3683 nfs_zap_acl_cache(inode);
3684 ret = nfs4_read_cached_acl(inode, buf, buflen);
3686 /* -ENOENT is returned if there is no ACL or if there is an ACL
3687 * but no cached acl data, just the acl length */
3689 return nfs4_get_acl_uncached(inode, buf, buflen);
3692 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3694 struct nfs_server *server = NFS_SERVER(inode);
3695 struct page *pages[NFS4ACL_MAXPAGES];
3696 struct nfs_setaclargs arg = {
3697 .fh = NFS_FH(inode),
3701 struct nfs_setaclres res;
3702 struct rpc_message msg = {
3703 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3709 if (!nfs4_server_supports_acls(server))
3711 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3714 nfs_inode_return_delegation(inode);
3715 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3718 * Free each page after tx, so the only ref left is
3719 * held by the network stack
3722 put_page(pages[i-1]);
3725 * Acl update can result in inode attribute update.
3726 * so mark the attribute cache invalid.
3728 spin_lock(&inode->i_lock);
3729 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3730 spin_unlock(&inode->i_lock);
3731 nfs_access_zap_cache(inode);
3732 nfs_zap_acl_cache(inode);
3736 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3738 struct nfs4_exception exception = { };
3741 err = nfs4_handle_exception(NFS_SERVER(inode),
3742 __nfs4_proc_set_acl(inode, buf, buflen),
3744 } while (exception.retry);
3749 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3751 struct nfs_client *clp = server->nfs_client;
3753 if (task->tk_status >= 0)
3755 switch(task->tk_status) {
3756 case -NFS4ERR_ADMIN_REVOKED:
3757 case -NFS4ERR_BAD_STATEID:
3758 case -NFS4ERR_OPENMODE:
3761 nfs4_schedule_stateid_recovery(server, state);
3762 goto wait_on_recovery;
3763 case -NFS4ERR_EXPIRED:
3765 nfs4_schedule_stateid_recovery(server, state);
3766 case -NFS4ERR_STALE_STATEID:
3767 case -NFS4ERR_STALE_CLIENTID:
3768 nfs4_schedule_lease_recovery(clp);
3769 goto wait_on_recovery;
3770 #if defined(CONFIG_NFS_V4_1)
3771 case -NFS4ERR_BADSESSION:
3772 case -NFS4ERR_BADSLOT:
3773 case -NFS4ERR_BAD_HIGH_SLOT:
3774 case -NFS4ERR_DEADSESSION:
3775 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3776 case -NFS4ERR_SEQ_FALSE_RETRY:
3777 case -NFS4ERR_SEQ_MISORDERED:
3778 dprintk("%s ERROR %d, Reset session\n", __func__,
3780 nfs4_schedule_session_recovery(clp->cl_session);
3781 task->tk_status = 0;
3783 #endif /* CONFIG_NFS_V4_1 */
3784 case -NFS4ERR_DELAY:
3785 nfs_inc_server_stats(server, NFSIOS_DELAY);
3786 case -NFS4ERR_GRACE:
3788 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3789 task->tk_status = 0;
3791 case -NFS4ERR_RETRY_UNCACHED_REP:
3792 case -NFS4ERR_OLD_STATEID:
3793 task->tk_status = 0;
3796 task->tk_status = nfs4_map_errors(task->tk_status);
3799 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3800 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3801 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3802 task->tk_status = 0;
3806 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3807 unsigned short port, struct rpc_cred *cred,
3808 struct nfs4_setclientid_res *res)
3810 nfs4_verifier sc_verifier;
3811 struct nfs4_setclientid setclientid = {
3812 .sc_verifier = &sc_verifier,
3814 .sc_cb_ident = clp->cl_cb_ident,
3816 struct rpc_message msg = {
3817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3818 .rpc_argp = &setclientid,
3826 p = (__be32*)sc_verifier.data;
3827 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3828 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3831 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3832 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3834 rpc_peeraddr2str(clp->cl_rpcclient,
3836 rpc_peeraddr2str(clp->cl_rpcclient,
3838 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3839 clp->cl_id_uniquifier);
3840 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3841 sizeof(setclientid.sc_netid),
3842 rpc_peeraddr2str(clp->cl_rpcclient,
3843 RPC_DISPLAY_NETID));
3844 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3845 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3846 clp->cl_ipaddr, port >> 8, port & 255);
3848 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3849 if (status != -NFS4ERR_CLID_INUSE)
3852 ++clp->cl_id_uniquifier;
3856 ssleep(clp->cl_lease_time / HZ + 1);
3861 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3862 struct nfs4_setclientid_res *arg,
3863 struct rpc_cred *cred)
3865 struct nfs_fsinfo fsinfo;
3866 struct rpc_message msg = {
3867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3869 .rpc_resp = &fsinfo,
3876 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3878 spin_lock(&clp->cl_lock);
3879 clp->cl_lease_time = fsinfo.lease_time * HZ;
3880 clp->cl_last_renewal = now;
3881 spin_unlock(&clp->cl_lock);
3886 struct nfs4_delegreturndata {
3887 struct nfs4_delegreturnargs args;
3888 struct nfs4_delegreturnres res;
3890 nfs4_stateid stateid;
3891 unsigned long timestamp;
3892 struct nfs_fattr fattr;
3896 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3898 struct nfs4_delegreturndata *data = calldata;
3900 if (!nfs4_sequence_done(task, &data->res.seq_res))
3903 switch (task->tk_status) {
3904 case -NFS4ERR_STALE_STATEID:
3905 case -NFS4ERR_EXPIRED:
3907 renew_lease(data->res.server, data->timestamp);
3910 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3912 rpc_restart_call_prepare(task);
3916 data->rpc_status = task->tk_status;
3919 static void nfs4_delegreturn_release(void *calldata)
3924 #if defined(CONFIG_NFS_V4_1)
3925 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3927 struct nfs4_delegreturndata *d_data;
3929 d_data = (struct nfs4_delegreturndata *)data;
3931 if (nfs4_setup_sequence(d_data->res.server,
3932 &d_data->args.seq_args,
3933 &d_data->res.seq_res, task))
3935 rpc_call_start(task);
3937 #endif /* CONFIG_NFS_V4_1 */
3939 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3940 #if defined(CONFIG_NFS_V4_1)
3941 .rpc_call_prepare = nfs4_delegreturn_prepare,
3942 #endif /* CONFIG_NFS_V4_1 */
3943 .rpc_call_done = nfs4_delegreturn_done,
3944 .rpc_release = nfs4_delegreturn_release,
3947 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3949 struct nfs4_delegreturndata *data;
3950 struct nfs_server *server = NFS_SERVER(inode);
3951 struct rpc_task *task;
3952 struct rpc_message msg = {
3953 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3956 struct rpc_task_setup task_setup_data = {
3957 .rpc_client = server->client,
3958 .rpc_message = &msg,
3959 .callback_ops = &nfs4_delegreturn_ops,
3960 .flags = RPC_TASK_ASYNC,
3964 data = kzalloc(sizeof(*data), GFP_NOFS);
3967 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3968 data->args.fhandle = &data->fh;
3969 data->args.stateid = &data->stateid;
3970 data->args.bitmask = server->attr_bitmask;
3971 nfs_copy_fh(&data->fh, NFS_FH(inode));
3972 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3973 data->res.fattr = &data->fattr;
3974 data->res.server = server;
3975 nfs_fattr_init(data->res.fattr);
3976 data->timestamp = jiffies;
3977 data->rpc_status = 0;
3979 task_setup_data.callback_data = data;
3980 msg.rpc_argp = &data->args;
3981 msg.rpc_resp = &data->res;
3982 task = rpc_run_task(&task_setup_data);
3984 return PTR_ERR(task);
3987 status = nfs4_wait_for_completion_rpc_task(task);
3990 status = data->rpc_status;
3993 nfs_refresh_inode(inode, &data->fattr);
3999 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4001 struct nfs_server *server = NFS_SERVER(inode);
4002 struct nfs4_exception exception = { };
4005 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4007 case -NFS4ERR_STALE_STATEID:
4008 case -NFS4ERR_EXPIRED:
4012 err = nfs4_handle_exception(server, err, &exception);
4013 } while (exception.retry);
4017 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4018 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4021 * sleep, with exponential backoff, and retry the LOCK operation.
4023 static unsigned long
4024 nfs4_set_lock_task_retry(unsigned long timeout)
4026 freezable_schedule_timeout_killable(timeout);
4028 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4029 return NFS4_LOCK_MAXTIMEOUT;
4033 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4035 struct inode *inode = state->inode;
4036 struct nfs_server *server = NFS_SERVER(inode);
4037 struct nfs_client *clp = server->nfs_client;
4038 struct nfs_lockt_args arg = {
4039 .fh = NFS_FH(inode),
4042 struct nfs_lockt_res res = {
4045 struct rpc_message msg = {
4046 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4049 .rpc_cred = state->owner->so_cred,
4051 struct nfs4_lock_state *lsp;
4054 arg.lock_owner.clientid = clp->cl_clientid;
4055 status = nfs4_set_lock_state(state, request);
4058 lsp = request->fl_u.nfs4_fl.owner;
4059 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4060 arg.lock_owner.s_dev = server->s_dev;
4061 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4064 request->fl_type = F_UNLCK;
4066 case -NFS4ERR_DENIED:
4069 request->fl_ops->fl_release_private(request);
4074 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4076 struct nfs4_exception exception = { };
4080 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4081 _nfs4_proc_getlk(state, cmd, request),
4083 } while (exception.retry);
4087 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4090 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4092 res = posix_lock_file_wait(file, fl);
4095 res = flock_lock_file_wait(file, fl);
4103 struct nfs4_unlockdata {
4104 struct nfs_locku_args arg;
4105 struct nfs_locku_res res;
4106 struct nfs4_lock_state *lsp;
4107 struct nfs_open_context *ctx;
4108 struct file_lock fl;
4109 const struct nfs_server *server;
4110 unsigned long timestamp;
4113 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4114 struct nfs_open_context *ctx,
4115 struct nfs4_lock_state *lsp,
4116 struct nfs_seqid *seqid)
4118 struct nfs4_unlockdata *p;
4119 struct inode *inode = lsp->ls_state->inode;
4121 p = kzalloc(sizeof(*p), GFP_NOFS);
4124 p->arg.fh = NFS_FH(inode);
4126 p->arg.seqid = seqid;
4127 p->res.seqid = seqid;
4128 p->arg.stateid = &lsp->ls_stateid;
4130 atomic_inc(&lsp->ls_count);
4131 /* Ensure we don't close file until we're done freeing locks! */
4132 p->ctx = get_nfs_open_context(ctx);
4133 memcpy(&p->fl, fl, sizeof(p->fl));
4134 p->server = NFS_SERVER(inode);
4138 static void nfs4_locku_release_calldata(void *data)
4140 struct nfs4_unlockdata *calldata = data;
4141 nfs_free_seqid(calldata->arg.seqid);
4142 nfs4_put_lock_state(calldata->lsp);
4143 put_nfs_open_context(calldata->ctx);
4147 static void nfs4_locku_done(struct rpc_task *task, void *data)
4149 struct nfs4_unlockdata *calldata = data;
4151 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4153 switch (task->tk_status) {
4155 memcpy(calldata->lsp->ls_stateid.data,
4156 calldata->res.stateid.data,
4157 sizeof(calldata->lsp->ls_stateid.data));
4158 renew_lease(calldata->server, calldata->timestamp);
4160 case -NFS4ERR_BAD_STATEID:
4161 case -NFS4ERR_OLD_STATEID:
4162 case -NFS4ERR_STALE_STATEID:
4163 case -NFS4ERR_EXPIRED:
4166 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4167 rpc_restart_call_prepare(task);
4171 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4173 struct nfs4_unlockdata *calldata = data;
4175 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4177 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4178 /* Note: exit _without_ running nfs4_locku_done */
4179 task->tk_action = NULL;
4182 calldata->timestamp = jiffies;
4183 if (nfs4_setup_sequence(calldata->server,
4184 &calldata->arg.seq_args,
4185 &calldata->res.seq_res, task))
4187 rpc_call_start(task);
4190 static const struct rpc_call_ops nfs4_locku_ops = {
4191 .rpc_call_prepare = nfs4_locku_prepare,
4192 .rpc_call_done = nfs4_locku_done,
4193 .rpc_release = nfs4_locku_release_calldata,
4196 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4197 struct nfs_open_context *ctx,
4198 struct nfs4_lock_state *lsp,
4199 struct nfs_seqid *seqid)
4201 struct nfs4_unlockdata *data;
4202 struct rpc_message msg = {
4203 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4204 .rpc_cred = ctx->cred,
4206 struct rpc_task_setup task_setup_data = {
4207 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4208 .rpc_message = &msg,
4209 .callback_ops = &nfs4_locku_ops,
4210 .workqueue = nfsiod_workqueue,
4211 .flags = RPC_TASK_ASYNC,
4214 /* Ensure this is an unlock - when canceling a lock, the
4215 * canceled lock is passed in, and it won't be an unlock.
4217 fl->fl_type = F_UNLCK;
4219 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4221 nfs_free_seqid(seqid);
4222 return ERR_PTR(-ENOMEM);
4225 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4226 msg.rpc_argp = &data->arg;
4227 msg.rpc_resp = &data->res;
4228 task_setup_data.callback_data = data;
4229 return rpc_run_task(&task_setup_data);
4232 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4234 struct nfs_inode *nfsi = NFS_I(state->inode);
4235 struct nfs_seqid *seqid;
4236 struct nfs4_lock_state *lsp;
4237 struct rpc_task *task;
4239 unsigned char fl_flags = request->fl_flags;
4241 status = nfs4_set_lock_state(state, request);
4242 /* Unlock _before_ we do the RPC call */
4243 request->fl_flags |= FL_EXISTS;
4244 down_read(&nfsi->rwsem);
4245 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4246 up_read(&nfsi->rwsem);
4249 up_read(&nfsi->rwsem);
4252 /* Is this a delegated lock? */
4253 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4255 lsp = request->fl_u.nfs4_fl.owner;
4256 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4260 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4261 status = PTR_ERR(task);
4264 status = nfs4_wait_for_completion_rpc_task(task);
4267 request->fl_flags = fl_flags;
4271 struct nfs4_lockdata {
4272 struct nfs_lock_args arg;
4273 struct nfs_lock_res res;
4274 struct nfs4_lock_state *lsp;
4275 struct nfs_open_context *ctx;
4276 struct file_lock fl;
4277 unsigned long timestamp;
4280 struct nfs_server *server;
4283 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4284 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4287 struct nfs4_lockdata *p;
4288 struct inode *inode = lsp->ls_state->inode;
4289 struct nfs_server *server = NFS_SERVER(inode);
4291 p = kzalloc(sizeof(*p), gfp_mask);
4295 p->arg.fh = NFS_FH(inode);
4297 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4298 if (p->arg.open_seqid == NULL)
4300 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4301 if (p->arg.lock_seqid == NULL)
4302 goto out_free_seqid;
4303 p->arg.lock_stateid = &lsp->ls_stateid;
4304 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4305 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4306 p->arg.lock_owner.s_dev = server->s_dev;
4307 p->res.lock_seqid = p->arg.lock_seqid;
4310 atomic_inc(&lsp->ls_count);
4311 p->ctx = get_nfs_open_context(ctx);
4312 memcpy(&p->fl, fl, sizeof(p->fl));
4315 nfs_free_seqid(p->arg.open_seqid);
4321 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4323 struct nfs4_lockdata *data = calldata;
4324 struct nfs4_state *state = data->lsp->ls_state;
4326 dprintk("%s: begin!\n", __func__);
4327 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4329 /* Do we need to do an open_to_lock_owner? */
4330 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4331 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4333 data->arg.open_stateid = &state->stateid;
4334 data->arg.new_lock_owner = 1;
4335 data->res.open_seqid = data->arg.open_seqid;
4337 data->arg.new_lock_owner = 0;
4338 data->timestamp = jiffies;
4339 if (nfs4_setup_sequence(data->server,
4340 &data->arg.seq_args,
4341 &data->res.seq_res, task))
4343 rpc_call_start(task);
4344 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4347 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4349 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4350 nfs4_lock_prepare(task, calldata);
4353 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4355 struct nfs4_lockdata *data = calldata;
4357 dprintk("%s: begin!\n", __func__);
4359 if (!nfs4_sequence_done(task, &data->res.seq_res))
4362 data->rpc_status = task->tk_status;
4363 if (data->arg.new_lock_owner != 0) {
4364 if (data->rpc_status == 0)
4365 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4369 if (data->rpc_status == 0) {
4370 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4371 sizeof(data->lsp->ls_stateid.data));
4372 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4373 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4376 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4379 static void nfs4_lock_release(void *calldata)
4381 struct nfs4_lockdata *data = calldata;
4383 dprintk("%s: begin!\n", __func__);
4384 nfs_free_seqid(data->arg.open_seqid);
4385 if (data->cancelled != 0) {
4386 struct rpc_task *task;
4387 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4388 data->arg.lock_seqid);
4390 rpc_put_task_async(task);
4391 dprintk("%s: cancelling lock!\n", __func__);
4393 nfs_free_seqid(data->arg.lock_seqid);
4394 nfs4_put_lock_state(data->lsp);
4395 put_nfs_open_context(data->ctx);
4397 dprintk("%s: done!\n", __func__);
4400 static const struct rpc_call_ops nfs4_lock_ops = {
4401 .rpc_call_prepare = nfs4_lock_prepare,
4402 .rpc_call_done = nfs4_lock_done,
4403 .rpc_release = nfs4_lock_release,
4406 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4407 .rpc_call_prepare = nfs4_recover_lock_prepare,
4408 .rpc_call_done = nfs4_lock_done,
4409 .rpc_release = nfs4_lock_release,
4412 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4415 case -NFS4ERR_ADMIN_REVOKED:
4416 case -NFS4ERR_BAD_STATEID:
4417 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4418 if (new_lock_owner != 0 ||
4419 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4420 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4422 case -NFS4ERR_STALE_STATEID:
4423 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4424 case -NFS4ERR_EXPIRED:
4425 nfs4_schedule_lease_recovery(server->nfs_client);
4429 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4431 struct nfs4_lockdata *data;
4432 struct rpc_task *task;
4433 struct rpc_message msg = {
4434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4435 .rpc_cred = state->owner->so_cred,
4437 struct rpc_task_setup task_setup_data = {
4438 .rpc_client = NFS_CLIENT(state->inode),
4439 .rpc_message = &msg,
4440 .callback_ops = &nfs4_lock_ops,
4441 .workqueue = nfsiod_workqueue,
4442 .flags = RPC_TASK_ASYNC,
4446 dprintk("%s: begin!\n", __func__);
4447 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4448 fl->fl_u.nfs4_fl.owner,
4449 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4453 data->arg.block = 1;
4454 if (recovery_type > NFS_LOCK_NEW) {
4455 if (recovery_type == NFS_LOCK_RECLAIM)
4456 data->arg.reclaim = NFS_LOCK_RECLAIM;
4457 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4459 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4460 msg.rpc_argp = &data->arg;
4461 msg.rpc_resp = &data->res;
4462 task_setup_data.callback_data = data;
4463 task = rpc_run_task(&task_setup_data);
4465 return PTR_ERR(task);
4466 ret = nfs4_wait_for_completion_rpc_task(task);
4468 ret = data->rpc_status;
4470 nfs4_handle_setlk_error(data->server, data->lsp,
4471 data->arg.new_lock_owner, ret);
4473 data->cancelled = 1;
4475 dprintk("%s: done, ret = %d!\n", __func__, ret);
4479 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4481 struct nfs_server *server = NFS_SERVER(state->inode);
4482 struct nfs4_exception exception = { };
4486 /* Cache the lock if possible... */
4487 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4489 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4490 if (err != -NFS4ERR_DELAY)
4492 nfs4_handle_exception(server, err, &exception);
4493 } while (exception.retry);
4497 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4499 struct nfs_server *server = NFS_SERVER(state->inode);
4500 struct nfs4_exception exception = { };
4503 err = nfs4_set_lock_state(state, request);
4507 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4509 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4513 case -NFS4ERR_GRACE:
4514 case -NFS4ERR_DELAY:
4515 nfs4_handle_exception(server, err, &exception);
4518 } while (exception.retry);
4523 #if defined(CONFIG_NFS_V4_1)
4524 static int nfs41_check_expired_locks(struct nfs4_state *state)
4526 int status, ret = NFS_OK;
4527 struct nfs4_lock_state *lsp;
4528 struct nfs_server *server = NFS_SERVER(state->inode);
4530 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4531 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4532 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4533 if (status != NFS_OK) {
4534 nfs41_free_stateid(server, &lsp->ls_stateid);
4535 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4544 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4546 int status = NFS_OK;
4548 if (test_bit(LK_STATE_IN_USE, &state->flags))
4549 status = nfs41_check_expired_locks(state);
4550 if (status == NFS_OK)
4552 return nfs4_lock_expired(state, request);
4556 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4558 struct nfs_inode *nfsi = NFS_I(state->inode);
4559 unsigned char fl_flags = request->fl_flags;
4560 int status = -ENOLCK;
4562 if ((fl_flags & FL_POSIX) &&
4563 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4565 /* Is this a delegated open? */
4566 status = nfs4_set_lock_state(state, request);
4569 request->fl_flags |= FL_ACCESS;
4570 status = do_vfs_lock(request->fl_file, request);
4573 down_read(&nfsi->rwsem);
4574 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4575 /* Yes: cache locks! */
4576 /* ...but avoid races with delegation recall... */
4577 request->fl_flags = fl_flags & ~FL_SLEEP;
4578 status = do_vfs_lock(request->fl_file, request);
4581 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4584 /* Note: we always want to sleep here! */
4585 request->fl_flags = fl_flags | FL_SLEEP;
4586 if (do_vfs_lock(request->fl_file, request) < 0)
4587 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4589 up_read(&nfsi->rwsem);
4591 request->fl_flags = fl_flags;
4595 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4597 struct nfs4_exception exception = { };
4601 err = _nfs4_proc_setlk(state, cmd, request);
4602 if (err == -NFS4ERR_DENIED)
4604 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4606 } while (exception.retry);
4611 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4613 struct nfs_open_context *ctx;
4614 struct nfs4_state *state;
4615 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4618 /* verify open state */
4619 ctx = nfs_file_open_context(filp);
4622 if (request->fl_start < 0 || request->fl_end < 0)
4625 if (IS_GETLK(cmd)) {
4627 return nfs4_proc_getlk(state, F_GETLK, request);
4631 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4634 if (request->fl_type == F_UNLCK) {
4636 return nfs4_proc_unlck(state, cmd, request);
4643 status = nfs4_proc_setlk(state, cmd, request);
4644 if ((status != -EAGAIN) || IS_SETLK(cmd))
4646 timeout = nfs4_set_lock_task_retry(timeout);
4647 status = -ERESTARTSYS;
4650 } while(status < 0);
4654 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4656 struct nfs_server *server = NFS_SERVER(state->inode);
4657 struct nfs4_exception exception = { };
4660 err = nfs4_set_lock_state(state, fl);
4664 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4667 printk(KERN_ERR "%s: unhandled error %d.\n",
4672 case -NFS4ERR_EXPIRED:
4673 nfs4_schedule_stateid_recovery(server, state);
4674 case -NFS4ERR_STALE_CLIENTID:
4675 case -NFS4ERR_STALE_STATEID:
4676 nfs4_schedule_lease_recovery(server->nfs_client);
4678 case -NFS4ERR_BADSESSION:
4679 case -NFS4ERR_BADSLOT:
4680 case -NFS4ERR_BAD_HIGH_SLOT:
4681 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4682 case -NFS4ERR_DEADSESSION:
4683 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4687 * The show must go on: exit, but mark the
4688 * stateid as needing recovery.
4690 case -NFS4ERR_ADMIN_REVOKED:
4691 case -NFS4ERR_BAD_STATEID:
4692 case -NFS4ERR_OPENMODE:
4693 nfs4_schedule_stateid_recovery(server, state);
4698 * User RPCSEC_GSS context has expired.
4699 * We cannot recover this stateid now, so
4700 * skip it and allow recovery thread to
4706 case -NFS4ERR_DENIED:
4707 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4710 case -NFS4ERR_DELAY:
4713 err = nfs4_handle_exception(server, err, &exception);
4714 } while (exception.retry);
4719 static void nfs4_release_lockowner_release(void *calldata)
4724 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4725 .rpc_release = nfs4_release_lockowner_release,
4728 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4730 struct nfs_server *server = lsp->ls_state->owner->so_server;
4731 struct nfs_release_lockowner_args *args;
4732 struct rpc_message msg = {
4733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4736 if (server->nfs_client->cl_mvops->minor_version != 0)
4738 args = kmalloc(sizeof(*args), GFP_NOFS);
4741 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4742 args->lock_owner.id = lsp->ls_seqid.owner_id;
4743 args->lock_owner.s_dev = server->s_dev;
4744 msg.rpc_argp = args;
4745 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4748 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4750 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4751 const void *buf, size_t buflen,
4752 int flags, int type)
4754 if (strcmp(key, "") != 0)
4757 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4760 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4761 void *buf, size_t buflen, int type)
4763 if (strcmp(key, "") != 0)
4766 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4769 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4770 size_t list_len, const char *name,
4771 size_t name_len, int type)
4773 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4775 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4778 if (list && len <= list_len)
4779 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4784 * nfs_fhget will use either the mounted_on_fileid or the fileid
4786 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4788 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4789 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4790 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4791 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4794 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4795 NFS_ATTR_FATTR_NLINK;
4796 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4800 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4801 struct nfs4_fs_locations *fs_locations, struct page *page)
4803 struct nfs_server *server = NFS_SERVER(dir);
4805 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4807 struct nfs4_fs_locations_arg args = {
4808 .dir_fh = NFS_FH(dir),
4813 struct nfs4_fs_locations_res res = {
4814 .fs_locations = fs_locations,
4816 struct rpc_message msg = {
4817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4823 dprintk("%s: start\n", __func__);
4825 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4826 * is not supported */
4827 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4828 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4830 bitmask[0] |= FATTR4_WORD0_FILEID;
4832 nfs_fattr_init(&fs_locations->fattr);
4833 fs_locations->server = server;
4834 fs_locations->nlocations = 0;
4835 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4836 dprintk("%s: returned status = %d\n", __func__, status);
4840 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4843 struct nfs4_secinfo_arg args = {
4844 .dir_fh = NFS_FH(dir),
4847 struct nfs4_secinfo_res res = {
4850 struct rpc_message msg = {
4851 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4856 dprintk("NFS call secinfo %s\n", name->name);
4857 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4858 dprintk("NFS reply secinfo: %d\n", status);
4862 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4864 struct nfs4_exception exception = { };
4867 err = nfs4_handle_exception(NFS_SERVER(dir),
4868 _nfs4_proc_secinfo(dir, name, flavors),
4870 } while (exception.retry);
4874 #ifdef CONFIG_NFS_V4_1
4876 * Check the exchange flags returned by the server for invalid flags, having
4877 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4880 static int nfs4_check_cl_exchange_flags(u32 flags)
4882 if (flags & ~EXCHGID4_FLAG_MASK_R)
4884 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4885 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4887 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4891 return -NFS4ERR_INVAL;
4895 nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4897 if (a->server_scope_sz == b->server_scope_sz &&
4898 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4905 * nfs4_proc_exchange_id()
4907 * Since the clientid has expired, all compounds using sessions
4908 * associated with the stale clientid will be returning
4909 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4910 * be in some phase of session reset.
4912 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4914 nfs4_verifier verifier;
4915 struct nfs41_exchange_id_args args = {
4917 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4919 struct nfs41_exchange_id_res res = {
4923 struct rpc_message msg = {
4924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4931 dprintk("--> %s\n", __func__);
4932 BUG_ON(clp == NULL);
4934 p = (u32 *)verifier.data;
4935 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4936 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4937 args.verifier = &verifier;
4939 args.id_len = scnprintf(args.id, sizeof(args.id),
4942 init_utsname()->nodename,
4943 init_utsname()->domainname,
4944 clp->cl_rpcclient->cl_auth->au_flavor);
4946 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4947 if (unlikely(!res.server_scope))
4950 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4952 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4955 if (clp->server_scope &&
4956 !nfs41_same_server_scope(clp->server_scope,
4957 res.server_scope)) {
4958 dprintk("%s: server_scope mismatch detected\n",
4960 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4961 kfree(clp->server_scope);
4962 clp->server_scope = NULL;
4965 if (!clp->server_scope)
4966 clp->server_scope = res.server_scope;
4968 kfree(res.server_scope);
4971 dprintk("<-- %s status= %d\n", __func__, status);
4975 struct nfs4_get_lease_time_data {
4976 struct nfs4_get_lease_time_args *args;
4977 struct nfs4_get_lease_time_res *res;
4978 struct nfs_client *clp;
4981 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4985 struct nfs4_get_lease_time_data *data =
4986 (struct nfs4_get_lease_time_data *)calldata;
4988 dprintk("--> %s\n", __func__);
4989 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4990 /* just setup sequence, do not trigger session recovery
4991 since we're invoked within one */
4992 ret = nfs41_setup_sequence(data->clp->cl_session,
4993 &data->args->la_seq_args,
4994 &data->res->lr_seq_res, task);
4996 BUG_ON(ret == -EAGAIN);
4997 rpc_call_start(task);
4998 dprintk("<-- %s\n", __func__);
5002 * Called from nfs4_state_manager thread for session setup, so don't recover
5003 * from sequence operation or clientid errors.
5005 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5007 struct nfs4_get_lease_time_data *data =
5008 (struct nfs4_get_lease_time_data *)calldata;
5010 dprintk("--> %s\n", __func__);
5011 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5013 switch (task->tk_status) {
5014 case -NFS4ERR_DELAY:
5015 case -NFS4ERR_GRACE:
5016 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5017 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5018 task->tk_status = 0;
5020 case -NFS4ERR_RETRY_UNCACHED_REP:
5021 rpc_restart_call_prepare(task);
5024 dprintk("<-- %s\n", __func__);
5027 struct rpc_call_ops nfs4_get_lease_time_ops = {
5028 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5029 .rpc_call_done = nfs4_get_lease_time_done,
5032 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5034 struct rpc_task *task;
5035 struct nfs4_get_lease_time_args args;
5036 struct nfs4_get_lease_time_res res = {
5037 .lr_fsinfo = fsinfo,
5039 struct nfs4_get_lease_time_data data = {
5044 struct rpc_message msg = {
5045 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5049 struct rpc_task_setup task_setup = {
5050 .rpc_client = clp->cl_rpcclient,
5051 .rpc_message = &msg,
5052 .callback_ops = &nfs4_get_lease_time_ops,
5053 .callback_data = &data,
5054 .flags = RPC_TASK_TIMEOUT,
5058 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5059 dprintk("--> %s\n", __func__);
5060 task = rpc_run_task(&task_setup);
5063 status = PTR_ERR(task);
5065 status = task->tk_status;
5068 dprintk("<-- %s return %d\n", __func__, status);
5074 * Reset a slot table
5076 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5079 struct nfs4_slot *new = NULL;
5083 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5084 max_reqs, tbl->max_slots);
5086 /* Does the newly negotiated max_reqs match the existing slot table? */
5087 if (max_reqs != tbl->max_slots) {
5089 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
5096 spin_lock(&tbl->slot_tbl_lock);
5099 tbl->max_slots = max_reqs;
5101 for (i = 0; i < tbl->max_slots; ++i)
5102 tbl->slots[i].seq_nr = ivalue;
5103 spin_unlock(&tbl->slot_tbl_lock);
5104 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5105 tbl, tbl->slots, tbl->max_slots);
5107 dprintk("<-- %s: return %d\n", __func__, ret);
5111 /* Destroy the slot table */
5112 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5114 if (session->fc_slot_table.slots != NULL) {
5115 kfree(session->fc_slot_table.slots);
5116 session->fc_slot_table.slots = NULL;
5118 if (session->bc_slot_table.slots != NULL) {
5119 kfree(session->bc_slot_table.slots);
5120 session->bc_slot_table.slots = NULL;
5126 * Initialize slot table
5128 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5129 int max_slots, int ivalue)
5131 struct nfs4_slot *slot;
5134 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5136 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
5138 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
5143 spin_lock(&tbl->slot_tbl_lock);
5144 tbl->max_slots = max_slots;
5146 tbl->highest_used_slotid = -1; /* no slot is currently used */
5147 spin_unlock(&tbl->slot_tbl_lock);
5148 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5149 tbl, tbl->slots, tbl->max_slots);
5151 dprintk("<-- %s: return %d\n", __func__, ret);
5156 * Initialize or reset the forechannel and backchannel tables
5158 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5160 struct nfs4_slot_table *tbl;
5163 dprintk("--> %s\n", __func__);
5165 tbl = &ses->fc_slot_table;
5166 if (tbl->slots == NULL) {
5167 status = nfs4_init_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5168 if (status) /* -ENOMEM */
5171 status = nfs4_reset_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5176 tbl = &ses->bc_slot_table;
5177 if (tbl->slots == NULL) {
5178 status = nfs4_init_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5180 /* Fore and back channel share a connection so get
5181 * both slot tables or neither */
5182 nfs4_destroy_slot_tables(ses);
5184 status = nfs4_reset_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5188 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5190 struct nfs4_session *session;
5191 struct nfs4_slot_table *tbl;
5193 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5197 tbl = &session->fc_slot_table;
5198 tbl->highest_used_slotid = -1;
5199 spin_lock_init(&tbl->slot_tbl_lock);
5200 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5201 init_completion(&tbl->complete);
5203 tbl = &session->bc_slot_table;
5204 tbl->highest_used_slotid = -1;
5205 spin_lock_init(&tbl->slot_tbl_lock);
5206 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5207 init_completion(&tbl->complete);
5209 session->session_state = 1<<NFS4_SESSION_INITING;
5215 void nfs4_destroy_session(struct nfs4_session *session)
5217 nfs4_proc_destroy_session(session);
5218 dprintk("%s Destroy backchannel for xprt %p\n",
5219 __func__, session->clp->cl_rpcclient->cl_xprt);
5220 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5221 NFS41_BC_MIN_CALLBACKS);
5222 nfs4_destroy_slot_tables(session);
5227 * Initialize the values to be used by the client in CREATE_SESSION
5228 * If nfs4_init_session set the fore channel request and response sizes,
5231 * Set the back channel max_resp_sz_cached to zero to force the client to
5232 * always set csa_cachethis to FALSE because the current implementation
5233 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5235 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5237 struct nfs4_session *session = args->client->cl_session;
5238 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5239 mxresp_sz = session->fc_attrs.max_resp_sz;
5242 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5244 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5245 /* Fore channel attributes */
5246 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5247 args->fc_attrs.max_resp_sz = mxresp_sz;
5248 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5249 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5251 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5252 "max_ops=%u max_reqs=%u\n",
5254 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5255 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5257 /* Back channel attributes */
5258 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5259 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5260 args->bc_attrs.max_resp_sz_cached = 0;
5261 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5262 args->bc_attrs.max_reqs = 1;
5264 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5265 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5267 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5268 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5269 args->bc_attrs.max_reqs);
5272 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5274 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5275 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5277 if (rcvd->max_resp_sz > sent->max_resp_sz)
5280 * Our requested max_ops is the minimum we need; we're not
5281 * prepared to break up compounds into smaller pieces than that.
5282 * So, no point even trying to continue if the server won't
5285 if (rcvd->max_ops < sent->max_ops)
5287 if (rcvd->max_reqs == 0)
5292 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5294 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5295 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5297 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5299 if (rcvd->max_resp_sz < sent->max_resp_sz)
5301 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5303 /* These would render the backchannel useless: */
5304 if (rcvd->max_ops == 0)
5306 if (rcvd->max_reqs == 0)
5311 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5312 struct nfs4_session *session)
5316 ret = nfs4_verify_fore_channel_attrs(args, session);
5319 return nfs4_verify_back_channel_attrs(args, session);
5322 static int _nfs4_proc_create_session(struct nfs_client *clp)
5324 struct nfs4_session *session = clp->cl_session;
5325 struct nfs41_create_session_args args = {
5327 .cb_program = NFS4_CALLBACK,
5329 struct nfs41_create_session_res res = {
5332 struct rpc_message msg = {
5333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5339 nfs4_init_channel_attrs(&args);
5340 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5342 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5345 /* Verify the session's negotiated channel_attrs values */
5346 status = nfs4_verify_channel_attrs(&args, session);
5348 /* Increment the clientid slot sequence id */
5356 * Issues a CREATE_SESSION operation to the server.
5357 * It is the responsibility of the caller to verify the session is
5358 * expired before calling this routine.
5360 int nfs4_proc_create_session(struct nfs_client *clp)
5364 struct nfs4_session *session = clp->cl_session;
5366 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5368 status = _nfs4_proc_create_session(clp);
5372 /* Init or reset the session slot tables */
5373 status = nfs4_setup_session_slot_tables(session);
5374 dprintk("slot table setup returned %d\n", status);
5378 ptr = (unsigned *)&session->sess_id.data[0];
5379 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5380 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5382 dprintk("<-- %s\n", __func__);
5387 * Issue the over-the-wire RPC DESTROY_SESSION.
5388 * The caller must serialize access to this routine.
5390 int nfs4_proc_destroy_session(struct nfs4_session *session)
5393 struct rpc_message msg;
5395 dprintk("--> nfs4_proc_destroy_session\n");
5397 /* session is still being setup */
5398 if (session->clp->cl_cons_state != NFS_CS_READY)
5401 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5402 msg.rpc_argp = session;
5403 msg.rpc_resp = NULL;
5404 msg.rpc_cred = NULL;
5405 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5409 "Got error %d from the server on DESTROY_SESSION. "
5410 "Session has been destroyed regardless...\n", status);
5412 dprintk("<-- nfs4_proc_destroy_session\n");
5416 int nfs4_init_session(struct nfs_server *server)
5418 struct nfs_client *clp = server->nfs_client;
5419 struct nfs4_session *session;
5420 unsigned int rsize, wsize;
5423 if (!nfs4_has_session(clp))
5426 session = clp->cl_session;
5427 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5430 rsize = server->rsize;
5432 rsize = NFS_MAX_FILE_IO_SIZE;
5433 wsize = server->wsize;
5435 wsize = NFS_MAX_FILE_IO_SIZE;
5437 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5438 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5440 ret = nfs4_recover_expired_lease(server);
5442 ret = nfs4_check_client_ready(clp);
5446 int nfs4_init_ds_session(struct nfs_client *clp)
5448 struct nfs4_session *session = clp->cl_session;
5451 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5454 ret = nfs4_client_recover_expired_lease(clp);
5456 /* Test for the DS role */
5457 if (!is_ds_client(clp))
5460 ret = nfs4_check_client_ready(clp);
5464 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5468 * Renew the cl_session lease.
5470 struct nfs4_sequence_data {
5471 struct nfs_client *clp;
5472 struct nfs4_sequence_args args;
5473 struct nfs4_sequence_res res;
5476 static void nfs41_sequence_release(void *data)
5478 struct nfs4_sequence_data *calldata = data;
5479 struct nfs_client *clp = calldata->clp;
5481 if (atomic_read(&clp->cl_count) > 1)
5482 nfs4_schedule_state_renewal(clp);
5483 nfs_put_client(clp);
5487 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5489 switch(task->tk_status) {
5490 case -NFS4ERR_DELAY:
5491 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5494 nfs4_schedule_lease_recovery(clp);
5499 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5501 struct nfs4_sequence_data *calldata = data;
5502 struct nfs_client *clp = calldata->clp;
5504 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5507 if (task->tk_status < 0) {
5508 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5509 if (atomic_read(&clp->cl_count) == 1)
5512 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5513 rpc_restart_call_prepare(task);
5517 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5519 dprintk("<-- %s\n", __func__);
5522 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5524 struct nfs4_sequence_data *calldata = data;
5525 struct nfs_client *clp = calldata->clp;
5526 struct nfs4_sequence_args *args;
5527 struct nfs4_sequence_res *res;
5529 args = task->tk_msg.rpc_argp;
5530 res = task->tk_msg.rpc_resp;
5532 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5534 rpc_call_start(task);
5537 static const struct rpc_call_ops nfs41_sequence_ops = {
5538 .rpc_call_done = nfs41_sequence_call_done,
5539 .rpc_call_prepare = nfs41_sequence_prepare,
5540 .rpc_release = nfs41_sequence_release,
5543 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5545 struct nfs4_sequence_data *calldata;
5546 struct rpc_message msg = {
5547 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5550 struct rpc_task_setup task_setup_data = {
5551 .rpc_client = clp->cl_rpcclient,
5552 .rpc_message = &msg,
5553 .callback_ops = &nfs41_sequence_ops,
5554 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5557 if (!atomic_inc_not_zero(&clp->cl_count))
5558 return ERR_PTR(-EIO);
5559 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5560 if (calldata == NULL) {
5561 nfs_put_client(clp);
5562 return ERR_PTR(-ENOMEM);
5564 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5565 msg.rpc_argp = &calldata->args;
5566 msg.rpc_resp = &calldata->res;
5567 calldata->clp = clp;
5568 task_setup_data.callback_data = calldata;
5570 return rpc_run_task(&task_setup_data);
5573 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5575 struct rpc_task *task;
5578 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5580 task = _nfs41_proc_sequence(clp, cred);
5582 ret = PTR_ERR(task);
5584 rpc_put_task_async(task);
5585 dprintk("<-- %s status=%d\n", __func__, ret);
5589 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5591 struct rpc_task *task;
5594 task = _nfs41_proc_sequence(clp, cred);
5596 ret = PTR_ERR(task);
5599 ret = rpc_wait_for_completion_task(task);
5601 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5603 if (task->tk_status == 0)
5604 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5605 ret = task->tk_status;
5609 dprintk("<-- %s status=%d\n", __func__, ret);
5613 struct nfs4_reclaim_complete_data {
5614 struct nfs_client *clp;
5615 struct nfs41_reclaim_complete_args arg;
5616 struct nfs41_reclaim_complete_res res;
5619 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5621 struct nfs4_reclaim_complete_data *calldata = data;
5623 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5624 if (nfs41_setup_sequence(calldata->clp->cl_session,
5625 &calldata->arg.seq_args,
5626 &calldata->res.seq_res, task))
5629 rpc_call_start(task);
5632 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5634 switch(task->tk_status) {
5636 case -NFS4ERR_COMPLETE_ALREADY:
5637 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5639 case -NFS4ERR_DELAY:
5640 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5642 case -NFS4ERR_RETRY_UNCACHED_REP:
5645 nfs4_schedule_lease_recovery(clp);
5650 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5652 struct nfs4_reclaim_complete_data *calldata = data;
5653 struct nfs_client *clp = calldata->clp;
5654 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5656 dprintk("--> %s\n", __func__);
5657 if (!nfs41_sequence_done(task, res))
5660 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5661 rpc_restart_call_prepare(task);
5664 dprintk("<-- %s\n", __func__);
5667 static void nfs4_free_reclaim_complete_data(void *data)
5669 struct nfs4_reclaim_complete_data *calldata = data;
5674 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5675 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5676 .rpc_call_done = nfs4_reclaim_complete_done,
5677 .rpc_release = nfs4_free_reclaim_complete_data,
5681 * Issue a global reclaim complete.
5683 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5685 struct nfs4_reclaim_complete_data *calldata;
5686 struct rpc_task *task;
5687 struct rpc_message msg = {
5688 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5690 struct rpc_task_setup task_setup_data = {
5691 .rpc_client = clp->cl_rpcclient,
5692 .rpc_message = &msg,
5693 .callback_ops = &nfs4_reclaim_complete_call_ops,
5694 .flags = RPC_TASK_ASYNC,
5696 int status = -ENOMEM;
5698 dprintk("--> %s\n", __func__);
5699 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5700 if (calldata == NULL)
5702 calldata->clp = clp;
5703 calldata->arg.one_fs = 0;
5705 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
5706 msg.rpc_argp = &calldata->arg;
5707 msg.rpc_resp = &calldata->res;
5708 task_setup_data.callback_data = calldata;
5709 task = rpc_run_task(&task_setup_data);
5711 status = PTR_ERR(task);
5714 status = nfs4_wait_for_completion_rpc_task(task);
5716 status = task->tk_status;
5720 dprintk("<-- %s status=%d\n", __func__, status);
5725 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5727 struct nfs4_layoutget *lgp = calldata;
5728 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5730 dprintk("--> %s\n", __func__);
5731 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5732 * right now covering the LAYOUTGET we are about to send.
5733 * However, that is not so catastrophic, and there seems
5734 * to be no way to prevent it completely.
5736 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5737 &lgp->res.seq_res, task))
5739 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5740 NFS_I(lgp->args.inode)->layout,
5741 lgp->args.ctx->state)) {
5742 rpc_exit(task, NFS4_OK);
5745 rpc_call_start(task);
5748 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5750 struct nfs4_layoutget *lgp = calldata;
5751 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5753 dprintk("--> %s\n", __func__);
5755 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5758 switch (task->tk_status) {
5761 case -NFS4ERR_LAYOUTTRYLATER:
5762 case -NFS4ERR_RECALLCONFLICT:
5763 task->tk_status = -NFS4ERR_DELAY;
5766 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5767 rpc_restart_call_prepare(task);
5771 dprintk("<-- %s\n", __func__);
5774 static void nfs4_layoutget_release(void *calldata)
5776 struct nfs4_layoutget *lgp = calldata;
5778 dprintk("--> %s\n", __func__);
5779 put_nfs_open_context(lgp->args.ctx);
5781 dprintk("<-- %s\n", __func__);
5784 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5785 .rpc_call_prepare = nfs4_layoutget_prepare,
5786 .rpc_call_done = nfs4_layoutget_done,
5787 .rpc_release = nfs4_layoutget_release,
5790 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5792 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5793 struct rpc_task *task;
5794 struct rpc_message msg = {
5795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5796 .rpc_argp = &lgp->args,
5797 .rpc_resp = &lgp->res,
5799 struct rpc_task_setup task_setup_data = {
5800 .rpc_client = server->client,
5801 .rpc_message = &msg,
5802 .callback_ops = &nfs4_layoutget_call_ops,
5803 .callback_data = lgp,
5804 .flags = RPC_TASK_ASYNC,
5808 dprintk("--> %s\n", __func__);
5810 lgp->res.layoutp = &lgp->args.layout;
5811 lgp->res.seq_res.sr_slot = NULL;
5812 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
5813 task = rpc_run_task(&task_setup_data);
5815 return PTR_ERR(task);
5816 status = nfs4_wait_for_completion_rpc_task(task);
5818 status = task->tk_status;
5820 status = pnfs_layout_process(lgp);
5822 dprintk("<-- %s status=%d\n", __func__, status);
5827 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5829 struct nfs4_layoutreturn *lrp = calldata;
5831 dprintk("--> %s\n", __func__);
5832 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5833 &lrp->res.seq_res, task))
5835 rpc_call_start(task);
5838 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5840 struct nfs4_layoutreturn *lrp = calldata;
5841 struct nfs_server *server;
5842 struct pnfs_layout_hdr *lo = lrp->args.layout;
5844 dprintk("--> %s\n", __func__);
5846 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5849 server = NFS_SERVER(lrp->args.inode);
5850 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5851 rpc_restart_call_prepare(task);
5854 spin_lock(&lo->plh_inode->i_lock);
5855 if (task->tk_status == 0) {
5856 if (lrp->res.lrs_present) {
5857 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5859 BUG_ON(!list_empty(&lo->plh_segs));
5861 lo->plh_block_lgets--;
5862 spin_unlock(&lo->plh_inode->i_lock);
5863 dprintk("<-- %s\n", __func__);
5866 static void nfs4_layoutreturn_release(void *calldata)
5868 struct nfs4_layoutreturn *lrp = calldata;
5870 dprintk("--> %s\n", __func__);
5871 put_layout_hdr(lrp->args.layout);
5873 dprintk("<-- %s\n", __func__);
5876 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5877 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5878 .rpc_call_done = nfs4_layoutreturn_done,
5879 .rpc_release = nfs4_layoutreturn_release,
5882 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5884 struct rpc_task *task;
5885 struct rpc_message msg = {
5886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5887 .rpc_argp = &lrp->args,
5888 .rpc_resp = &lrp->res,
5890 struct rpc_task_setup task_setup_data = {
5891 .rpc_client = lrp->clp->cl_rpcclient,
5892 .rpc_message = &msg,
5893 .callback_ops = &nfs4_layoutreturn_call_ops,
5894 .callback_data = lrp,
5898 dprintk("--> %s\n", __func__);
5899 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
5900 task = rpc_run_task(&task_setup_data);
5902 return PTR_ERR(task);
5903 status = task->tk_status;
5904 dprintk("<-- %s status=%d\n", __func__, status);
5910 * Retrieve the list of Data Server devices from the MDS.
5912 static int _nfs4_getdevicelist(struct nfs_server *server,
5913 const struct nfs_fh *fh,
5914 struct pnfs_devicelist *devlist)
5916 struct nfs4_getdevicelist_args args = {
5918 .layoutclass = server->pnfs_curr_ld->id,
5920 struct nfs4_getdevicelist_res res = {
5923 struct rpc_message msg = {
5924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5930 dprintk("--> %s\n", __func__);
5931 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5933 dprintk("<-- %s status=%d\n", __func__, status);
5937 int nfs4_proc_getdevicelist(struct nfs_server *server,
5938 const struct nfs_fh *fh,
5939 struct pnfs_devicelist *devlist)
5941 struct nfs4_exception exception = { };
5945 err = nfs4_handle_exception(server,
5946 _nfs4_getdevicelist(server, fh, devlist),
5948 } while (exception.retry);
5950 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5951 err, devlist->num_devs);
5955 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5958 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5960 struct nfs4_getdeviceinfo_args args = {
5963 struct nfs4_getdeviceinfo_res res = {
5966 struct rpc_message msg = {
5967 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5973 dprintk("--> %s\n", __func__);
5974 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5975 dprintk("<-- %s status=%d\n", __func__, status);
5980 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5982 struct nfs4_exception exception = { };
5986 err = nfs4_handle_exception(server,
5987 _nfs4_proc_getdeviceinfo(server, pdev),
5989 } while (exception.retry);
5992 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5994 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
5996 struct nfs4_layoutcommit_data *data = calldata;
5997 struct nfs_server *server = NFS_SERVER(data->args.inode);
5999 if (nfs4_setup_sequence(server, &data->args.seq_args,
6000 &data->res.seq_res, task))
6002 rpc_call_start(task);
6006 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6008 struct nfs4_layoutcommit_data *data = calldata;
6009 struct nfs_server *server = NFS_SERVER(data->args.inode);
6011 if (!nfs4_sequence_done(task, &data->res.seq_res))
6014 switch (task->tk_status) { /* Just ignore these failures */
6015 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6016 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6017 case NFS4ERR_BADLAYOUT: /* no layout */
6018 case NFS4ERR_GRACE: /* loca_recalim always false */
6019 task->tk_status = 0;
6022 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6023 rpc_restart_call_prepare(task);
6027 if (task->tk_status == 0)
6028 nfs_post_op_update_inode_force_wcc(data->args.inode,
6032 static void nfs4_layoutcommit_release(void *calldata)
6034 struct nfs4_layoutcommit_data *data = calldata;
6035 struct pnfs_layout_segment *lseg, *tmp;
6036 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6038 pnfs_cleanup_layoutcommit(data);
6039 /* Matched by references in pnfs_set_layoutcommit */
6040 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6041 list_del_init(&lseg->pls_lc_list);
6042 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6047 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6048 smp_mb__after_clear_bit();
6049 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6051 put_rpccred(data->cred);
6055 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6056 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6057 .rpc_call_done = nfs4_layoutcommit_done,
6058 .rpc_release = nfs4_layoutcommit_release,
6062 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6064 struct rpc_message msg = {
6065 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6066 .rpc_argp = &data->args,
6067 .rpc_resp = &data->res,
6068 .rpc_cred = data->cred,
6070 struct rpc_task_setup task_setup_data = {
6071 .task = &data->task,
6072 .rpc_client = NFS_CLIENT(data->args.inode),
6073 .rpc_message = &msg,
6074 .callback_ops = &nfs4_layoutcommit_ops,
6075 .callback_data = data,
6076 .flags = RPC_TASK_ASYNC,
6078 struct rpc_task *task;
6081 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6082 "lbw: %llu inode %lu\n",
6083 data->task.tk_pid, sync,
6084 data->args.lastbytewritten,
6085 data->args.inode->i_ino);
6087 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6088 task = rpc_run_task(&task_setup_data);
6090 return PTR_ERR(task);
6093 status = nfs4_wait_for_completion_rpc_task(task);
6096 status = task->tk_status;
6098 dprintk("%s: status %d\n", __func__, status);
6104 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6105 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6107 struct nfs41_secinfo_no_name_args args = {
6108 .style = SECINFO_STYLE_CURRENT_FH,
6110 struct nfs4_secinfo_res res = {
6113 struct rpc_message msg = {
6114 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6118 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6122 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6123 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6125 struct nfs4_exception exception = { };
6128 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6131 case -NFS4ERR_WRONGSEC:
6132 case -NFS4ERR_NOTSUPP:
6135 err = nfs4_handle_exception(server, err, &exception);
6137 } while (exception.retry);
6142 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6143 struct nfs_fsinfo *info)
6147 rpc_authflavor_t flavor;
6148 struct nfs4_secinfo_flavors *flavors;
6150 page = alloc_page(GFP_KERNEL);
6156 flavors = page_address(page);
6157 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6160 * Fall back on "guess and check" method if
6161 * the server doesn't support SECINFO_NO_NAME
6163 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6164 err = nfs4_find_root_sec(server, fhandle, info);
6170 flavor = nfs_find_best_sec(flavors);
6172 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6182 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6185 struct nfs41_test_stateid_args args = {
6188 struct nfs41_test_stateid_res res;
6189 struct rpc_message msg = {
6190 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6195 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6196 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6198 if (status == NFS_OK)
6203 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6205 struct nfs4_exception exception = { };
6208 err = nfs4_handle_exception(server,
6209 _nfs41_test_stateid(server, stateid),
6211 } while (exception.retry);
6215 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6217 struct nfs41_free_stateid_args args = {
6220 struct nfs41_free_stateid_res res;
6221 struct rpc_message msg = {
6222 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6227 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6228 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6231 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6233 struct nfs4_exception exception = { };
6236 err = nfs4_handle_exception(server,
6237 _nfs4_free_stateid(server, stateid),
6239 } while (exception.retry);
6242 #endif /* CONFIG_NFS_V4_1 */
6244 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6245 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6246 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6247 .recover_open = nfs4_open_reclaim,
6248 .recover_lock = nfs4_lock_reclaim,
6249 .establish_clid = nfs4_init_clientid,
6250 .get_clid_cred = nfs4_get_setclientid_cred,
6253 #if defined(CONFIG_NFS_V4_1)
6254 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6255 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6256 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6257 .recover_open = nfs4_open_reclaim,
6258 .recover_lock = nfs4_lock_reclaim,
6259 .establish_clid = nfs41_init_clientid,
6260 .get_clid_cred = nfs4_get_exchange_id_cred,
6261 .reclaim_complete = nfs41_proc_reclaim_complete,
6263 #endif /* CONFIG_NFS_V4_1 */
6265 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6266 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6267 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6268 .recover_open = nfs4_open_expired,
6269 .recover_lock = nfs4_lock_expired,
6270 .establish_clid = nfs4_init_clientid,
6271 .get_clid_cred = nfs4_get_setclientid_cred,
6274 #if defined(CONFIG_NFS_V4_1)
6275 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6276 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6277 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6278 .recover_open = nfs41_open_expired,
6279 .recover_lock = nfs41_lock_expired,
6280 .establish_clid = nfs41_init_clientid,
6281 .get_clid_cred = nfs4_get_exchange_id_cred,
6283 #endif /* CONFIG_NFS_V4_1 */
6285 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6286 .sched_state_renewal = nfs4_proc_async_renew,
6287 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6288 .renew_lease = nfs4_proc_renew,
6291 #if defined(CONFIG_NFS_V4_1)
6292 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6293 .sched_state_renewal = nfs41_proc_async_sequence,
6294 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6295 .renew_lease = nfs4_proc_sequence,
6299 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6301 .call_sync = _nfs4_call_sync,
6302 .validate_stateid = nfs4_validate_delegation_stateid,
6303 .find_root_sec = nfs4_find_root_sec,
6304 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6305 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6306 .state_renewal_ops = &nfs40_state_renewal_ops,
6309 #if defined(CONFIG_NFS_V4_1)
6310 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6312 .call_sync = _nfs4_call_sync_session,
6313 .validate_stateid = nfs41_validate_delegation_stateid,
6314 .find_root_sec = nfs41_find_root_sec,
6315 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6316 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6317 .state_renewal_ops = &nfs41_state_renewal_ops,
6321 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6322 [0] = &nfs_v4_0_minor_ops,
6323 #if defined(CONFIG_NFS_V4_1)
6324 [1] = &nfs_v4_1_minor_ops,
6328 static const struct inode_operations nfs4_file_inode_operations = {
6329 .permission = nfs_permission,
6330 .getattr = nfs_getattr,
6331 .setattr = nfs_setattr,
6332 .getxattr = generic_getxattr,
6333 .setxattr = generic_setxattr,
6334 .listxattr = generic_listxattr,
6335 .removexattr = generic_removexattr,
6338 const struct nfs_rpc_ops nfs_v4_clientops = {
6339 .version = 4, /* protocol version */
6340 .dentry_ops = &nfs4_dentry_operations,
6341 .dir_inode_ops = &nfs4_dir_inode_operations,
6342 .file_inode_ops = &nfs4_file_inode_operations,
6343 .file_ops = &nfs4_file_operations,
6344 .getroot = nfs4_proc_get_root,
6345 .getattr = nfs4_proc_getattr,
6346 .setattr = nfs4_proc_setattr,
6347 .lookup = nfs4_proc_lookup,
6348 .access = nfs4_proc_access,
6349 .readlink = nfs4_proc_readlink,
6350 .create = nfs4_proc_create,
6351 .remove = nfs4_proc_remove,
6352 .unlink_setup = nfs4_proc_unlink_setup,
6353 .unlink_done = nfs4_proc_unlink_done,
6354 .rename = nfs4_proc_rename,
6355 .rename_setup = nfs4_proc_rename_setup,
6356 .rename_done = nfs4_proc_rename_done,
6357 .link = nfs4_proc_link,
6358 .symlink = nfs4_proc_symlink,
6359 .mkdir = nfs4_proc_mkdir,
6360 .rmdir = nfs4_proc_remove,
6361 .readdir = nfs4_proc_readdir,
6362 .mknod = nfs4_proc_mknod,
6363 .statfs = nfs4_proc_statfs,
6364 .fsinfo = nfs4_proc_fsinfo,
6365 .pathconf = nfs4_proc_pathconf,
6366 .set_capabilities = nfs4_server_capabilities,
6367 .decode_dirent = nfs4_decode_dirent,
6368 .read_setup = nfs4_proc_read_setup,
6369 .read_done = nfs4_read_done,
6370 .write_setup = nfs4_proc_write_setup,
6371 .write_done = nfs4_write_done,
6372 .commit_setup = nfs4_proc_commit_setup,
6373 .commit_done = nfs4_commit_done,
6374 .lock = nfs4_proc_lock,
6375 .clear_acl_cache = nfs4_zap_acl_attr,
6376 .close_context = nfs4_close_context,
6377 .open_context = nfs4_atomic_open,
6378 .init_client = nfs4_init_client,
6379 .secinfo = nfs4_proc_secinfo,
6382 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6383 .prefix = XATTR_NAME_NFSV4_ACL,
6384 .list = nfs4_xattr_list_nfs4_acl,
6385 .get = nfs4_xattr_get_nfs4_acl,
6386 .set = nfs4_xattr_set_nfs4_acl,
6389 const struct xattr_handler *nfs4_xattr_handlers[] = {
6390 &nfs4_xattr_nfs4_acl_handler,