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)
75 static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
78 static int _nfs4_proc_open(struct nfs4_opendata *data);
79 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
80 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
82 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
83 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
84 struct nfs_fattr *fattr, struct iattr *sattr,
85 struct nfs4_state *state);
86 #ifdef CONFIG_NFS_V4_1
87 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
90 /* Prevent leaks of NFSv4 errors into userland */
91 static int nfs4_map_errors(int err)
96 case -NFS4ERR_RESOURCE:
98 case -NFS4ERR_WRONGSEC:
100 case -NFS4ERR_BADOWNER:
101 case -NFS4ERR_BADNAME:
104 dprintk("%s could not handle NFSv4 error %d\n",
112 * This is our standard bitmap for GETATTR requests.
114 const u32 nfs4_fattr_bitmap[2] = {
116 | FATTR4_WORD0_CHANGE
119 | FATTR4_WORD0_FILEID,
121 | FATTR4_WORD1_NUMLINKS
123 | FATTR4_WORD1_OWNER_GROUP
124 | FATTR4_WORD1_RAWDEV
125 | FATTR4_WORD1_SPACE_USED
126 | FATTR4_WORD1_TIME_ACCESS
127 | FATTR4_WORD1_TIME_METADATA
128 | FATTR4_WORD1_TIME_MODIFY
131 const u32 nfs4_statfs_bitmap[2] = {
132 FATTR4_WORD0_FILES_AVAIL
133 | FATTR4_WORD0_FILES_FREE
134 | FATTR4_WORD0_FILES_TOTAL,
135 FATTR4_WORD1_SPACE_AVAIL
136 | FATTR4_WORD1_SPACE_FREE
137 | FATTR4_WORD1_SPACE_TOTAL
140 const u32 nfs4_pathconf_bitmap[2] = {
142 | FATTR4_WORD0_MAXNAME,
146 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
147 | FATTR4_WORD0_MAXREAD
148 | FATTR4_WORD0_MAXWRITE
149 | FATTR4_WORD0_LEASE_TIME,
150 FATTR4_WORD1_TIME_DELTA
151 | FATTR4_WORD1_FS_LAYOUT_TYPES,
152 FATTR4_WORD2_LAYOUT_BLKSIZE
155 const u32 nfs4_fs_locations_bitmap[2] = {
157 | FATTR4_WORD0_CHANGE
160 | FATTR4_WORD0_FILEID
161 | FATTR4_WORD0_FS_LOCATIONS,
163 | FATTR4_WORD1_NUMLINKS
165 | FATTR4_WORD1_OWNER_GROUP
166 | FATTR4_WORD1_RAWDEV
167 | FATTR4_WORD1_SPACE_USED
168 | FATTR4_WORD1_TIME_ACCESS
169 | FATTR4_WORD1_TIME_METADATA
170 | FATTR4_WORD1_TIME_MODIFY
171 | FATTR4_WORD1_MOUNTED_ON_FILEID
174 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
175 struct nfs4_readdir_arg *readdir)
179 BUG_ON(readdir->count < 80);
181 readdir->cookie = cookie;
182 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
187 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
192 * NFSv4 servers do not return entries for '.' and '..'
193 * Therefore, we fake these entries here. We let '.'
194 * have cookie 0 and '..' have cookie 1. Note that
195 * when talking to the server, we always send cookie 0
198 start = p = kmap_atomic(*readdir->pages, KM_USER0);
201 *p++ = xdr_one; /* next */
202 *p++ = xdr_zero; /* cookie, first word */
203 *p++ = xdr_one; /* cookie, second word */
204 *p++ = xdr_one; /* entry len */
205 memcpy(p, ".\0\0\0", 4); /* entry */
207 *p++ = xdr_one; /* bitmap length */
208 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
209 *p++ = htonl(8); /* attribute buffer length */
210 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
213 *p++ = xdr_one; /* next */
214 *p++ = xdr_zero; /* cookie, first word */
215 *p++ = xdr_two; /* cookie, second word */
216 *p++ = xdr_two; /* entry len */
217 memcpy(p, "..\0\0", 4); /* entry */
219 *p++ = xdr_one; /* bitmap length */
220 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
221 *p++ = htonl(8); /* attribute buffer length */
222 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
224 readdir->pgbase = (char *)p - (char *)start;
225 readdir->count -= readdir->pgbase;
226 kunmap_atomic(start, KM_USER0);
229 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
235 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
236 nfs_wait_bit_killable, TASK_KILLABLE);
240 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
247 *timeout = NFS4_POLL_RETRY_MIN;
248 if (*timeout > NFS4_POLL_RETRY_MAX)
249 *timeout = NFS4_POLL_RETRY_MAX;
250 freezable_schedule_timeout_killable(*timeout);
251 if (fatal_signal_pending(current))
257 /* This is the error handling routine for processes that are allowed
260 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
262 struct nfs_client *clp = server->nfs_client;
263 struct nfs4_state *state = exception->state;
266 exception->retry = 0;
270 case -NFS4ERR_ADMIN_REVOKED:
271 case -NFS4ERR_BAD_STATEID:
272 case -NFS4ERR_OPENMODE:
275 nfs4_schedule_stateid_recovery(server, state);
276 goto wait_on_recovery;
277 case -NFS4ERR_EXPIRED:
279 nfs4_schedule_stateid_recovery(server, state);
280 case -NFS4ERR_STALE_STATEID:
281 case -NFS4ERR_STALE_CLIENTID:
282 nfs4_schedule_lease_recovery(clp);
283 goto wait_on_recovery;
284 #if defined(CONFIG_NFS_V4_1)
285 case -NFS4ERR_BADSESSION:
286 case -NFS4ERR_BADSLOT:
287 case -NFS4ERR_BAD_HIGH_SLOT:
288 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
289 case -NFS4ERR_DEADSESSION:
290 case -NFS4ERR_SEQ_FALSE_RETRY:
291 case -NFS4ERR_SEQ_MISORDERED:
292 dprintk("%s ERROR: %d Reset session\n", __func__,
294 nfs4_schedule_session_recovery(clp->cl_session);
295 exception->retry = 1;
297 #endif /* defined(CONFIG_NFS_V4_1) */
298 case -NFS4ERR_FILE_OPEN:
299 if (exception->timeout > HZ) {
300 /* We have retried a decent amount, time to
309 ret = nfs4_delay(server->client, &exception->timeout);
312 case -NFS4ERR_RETRY_UNCACHED_REP:
313 case -NFS4ERR_OLD_STATEID:
314 exception->retry = 1;
316 case -NFS4ERR_BADOWNER:
317 /* The following works around a Linux server bug! */
318 case -NFS4ERR_BADNAME:
319 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
320 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
321 exception->retry = 1;
322 printk(KERN_WARNING "NFS: v4 server %s "
323 "does not accept raw "
325 "Reenabling the idmapper.\n",
326 server->nfs_client->cl_hostname);
329 /* We failed to handle the error */
330 return nfs4_map_errors(ret);
332 ret = nfs4_wait_clnt_recover(clp);
334 exception->retry = 1;
339 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
341 spin_lock(&clp->cl_lock);
342 if (time_before(clp->cl_last_renewal,timestamp))
343 clp->cl_last_renewal = timestamp;
344 spin_unlock(&clp->cl_lock);
347 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
349 do_renew_lease(server->nfs_client, timestamp);
352 #if defined(CONFIG_NFS_V4_1)
355 * nfs4_free_slot - free a slot and efficiently update slot table.
357 * freeing a slot is trivially done by clearing its respective bit
359 * If the freed slotid equals highest_used_slotid we want to update it
360 * so that the server would be able to size down the slot table if needed,
361 * otherwise we know that the highest_used_slotid is still in use.
362 * When updating highest_used_slotid there may be "holes" in the bitmap
363 * so we need to scan down from highest_used_slotid to 0 looking for the now
364 * highest slotid in use.
365 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
367 * Must be called while holding tbl->slot_tbl_lock
370 nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
372 BUG_ON(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 = NFS4_NO_SLOT;
384 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
385 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 != NFS4_NO_SLOT)
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 != NFS4_NO_SLOT)
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_NO_SLOT otherwise.
515 * Note: must be called with under the slot_tbl_lock.
518 nfs4_find_slot(struct nfs4_slot_table *tbl)
521 u32 ret_id = NFS4_NO_SLOT;
523 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
524 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
526 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
527 if (slotid >= tbl->max_slots)
529 __set_bit(slotid, tbl->used_slots);
530 if (slotid > tbl->highest_used_slotid ||
531 tbl->highest_used_slotid == NFS4_NO_SLOT)
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_NO_SLOT) {
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 dprintk("%s: begin!\n", __func__);
1987 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1989 /* hmm. we are done with the inode, and in the process of freeing
1990 * the state_owner. we keep this around to process errors
1992 switch (task->tk_status) {
1995 pnfs_roc_set_barrier(state->inode,
1996 calldata->roc_barrier);
1997 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1998 renew_lease(server, calldata->timestamp);
1999 nfs4_close_clear_stateid_flags(state,
2000 calldata->arg.fmode);
2002 case -NFS4ERR_STALE_STATEID:
2003 case -NFS4ERR_OLD_STATEID:
2004 case -NFS4ERR_BAD_STATEID:
2005 case -NFS4ERR_EXPIRED:
2006 if (calldata->arg.fmode == 0)
2009 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2010 rpc_restart_call_prepare(task);
2012 nfs_release_seqid(calldata->arg.seqid);
2013 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2014 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2017 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2019 struct nfs4_closedata *calldata = data;
2020 struct nfs4_state *state = calldata->state;
2023 dprintk("%s: begin!\n", __func__);
2024 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2027 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2028 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2029 spin_lock(&state->owner->so_lock);
2030 /* Calculate the change in open mode */
2031 if (state->n_rdwr == 0) {
2032 if (state->n_rdonly == 0) {
2033 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2034 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2035 calldata->arg.fmode &= ~FMODE_READ;
2037 if (state->n_wronly == 0) {
2038 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2039 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2040 calldata->arg.fmode &= ~FMODE_WRITE;
2043 spin_unlock(&state->owner->so_lock);
2046 /* Note: exit _without_ calling nfs4_close_done */
2047 task->tk_action = NULL;
2051 if (calldata->arg.fmode == 0) {
2052 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2053 if (calldata->roc &&
2054 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2055 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2061 nfs_fattr_init(calldata->res.fattr);
2062 calldata->timestamp = jiffies;
2063 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2064 &calldata->arg.seq_args,
2065 &calldata->res.seq_res,
2068 rpc_call_start(task);
2070 dprintk("%s: done!\n", __func__);
2073 static const struct rpc_call_ops nfs4_close_ops = {
2074 .rpc_call_prepare = nfs4_close_prepare,
2075 .rpc_call_done = nfs4_close_done,
2076 .rpc_release = nfs4_free_closedata,
2080 * It is possible for data to be read/written from a mem-mapped file
2081 * after the sys_close call (which hits the vfs layer as a flush).
2082 * This means that we can't safely call nfsv4 close on a file until
2083 * the inode is cleared. This in turn means that we are not good
2084 * NFSv4 citizens - we do not indicate to the server to update the file's
2085 * share state even when we are done with one of the three share
2086 * stateid's in the inode.
2088 * NOTE: Caller must be holding the sp->so_owner semaphore!
2090 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2092 struct nfs_server *server = NFS_SERVER(state->inode);
2093 struct nfs4_closedata *calldata;
2094 struct nfs4_state_owner *sp = state->owner;
2095 struct rpc_task *task;
2096 struct rpc_message msg = {
2097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2098 .rpc_cred = state->owner->so_cred,
2100 struct rpc_task_setup task_setup_data = {
2101 .rpc_client = server->client,
2102 .rpc_message = &msg,
2103 .callback_ops = &nfs4_close_ops,
2104 .workqueue = nfsiod_workqueue,
2105 .flags = RPC_TASK_ASYNC,
2107 int status = -ENOMEM;
2109 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2110 if (calldata == NULL)
2112 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2113 calldata->inode = state->inode;
2114 calldata->state = state;
2115 calldata->arg.fh = NFS_FH(state->inode);
2116 calldata->arg.stateid = &state->open_stateid;
2117 /* Serialization for the sequence id */
2118 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2119 if (calldata->arg.seqid == NULL)
2120 goto out_free_calldata;
2121 calldata->arg.fmode = 0;
2122 calldata->arg.bitmask = server->cache_consistency_bitmask;
2123 calldata->res.fattr = &calldata->fattr;
2124 calldata->res.seqid = calldata->arg.seqid;
2125 calldata->res.server = server;
2126 calldata->roc = roc;
2127 nfs_sb_active(calldata->inode->i_sb);
2129 msg.rpc_argp = &calldata->arg;
2130 msg.rpc_resp = &calldata->res;
2131 task_setup_data.callback_data = calldata;
2132 task = rpc_run_task(&task_setup_data);
2134 return PTR_ERR(task);
2137 status = rpc_wait_for_completion_task(task);
2144 pnfs_roc_release(state->inode);
2145 nfs4_put_open_state(state);
2146 nfs4_put_state_owner(sp);
2150 static struct inode *
2151 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2153 struct nfs4_state *state;
2155 /* Protect against concurrent sillydeletes */
2156 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2158 return ERR_CAST(state);
2160 return igrab(state->inode);
2163 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2165 if (ctx->state == NULL)
2168 nfs4_close_sync(ctx->state, ctx->mode);
2170 nfs4_close_state(ctx->state, ctx->mode);
2173 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2175 struct nfs4_server_caps_arg args = {
2178 struct nfs4_server_caps_res res = {};
2179 struct rpc_message msg = {
2180 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2186 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2188 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2189 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2190 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2191 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2192 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2193 NFS_CAP_CTIME|NFS_CAP_MTIME);
2194 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2195 server->caps |= NFS_CAP_ACLS;
2196 if (res.has_links != 0)
2197 server->caps |= NFS_CAP_HARDLINKS;
2198 if (res.has_symlinks != 0)
2199 server->caps |= NFS_CAP_SYMLINKS;
2200 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2201 server->caps |= NFS_CAP_FILEID;
2202 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2203 server->caps |= NFS_CAP_MODE;
2204 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2205 server->caps |= NFS_CAP_NLINK;
2206 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2207 server->caps |= NFS_CAP_OWNER;
2208 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2209 server->caps |= NFS_CAP_OWNER_GROUP;
2210 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2211 server->caps |= NFS_CAP_ATIME;
2212 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2213 server->caps |= NFS_CAP_CTIME;
2214 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2215 server->caps |= NFS_CAP_MTIME;
2217 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2218 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2219 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2220 server->acl_bitmask = res.acl_bitmask;
2226 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2228 struct nfs4_exception exception = { };
2231 err = nfs4_handle_exception(server,
2232 _nfs4_server_capabilities(server, fhandle),
2234 } while (exception.retry);
2238 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2239 struct nfs_fsinfo *info)
2241 struct nfs4_lookup_root_arg args = {
2242 .bitmask = nfs4_fattr_bitmap,
2244 struct nfs4_lookup_res res = {
2246 .fattr = info->fattr,
2249 struct rpc_message msg = {
2250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2255 nfs_fattr_init(info->fattr);
2256 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2259 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2260 struct nfs_fsinfo *info)
2262 struct nfs4_exception exception = { };
2265 err = _nfs4_lookup_root(server, fhandle, info);
2268 case -NFS4ERR_WRONGSEC:
2271 err = nfs4_handle_exception(server, err, &exception);
2273 } while (exception.retry);
2277 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2278 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2280 struct rpc_auth *auth;
2283 auth = rpcauth_create(flavor, server->client);
2288 ret = nfs4_lookup_root(server, fhandle, info);
2293 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2294 struct nfs_fsinfo *info)
2296 int i, len, status = 0;
2297 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2299 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2300 flav_array[len] = RPC_AUTH_NULL;
2303 for (i = 0; i < len; i++) {
2304 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2305 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2310 * -EACCESS could mean that the user doesn't have correct permissions
2311 * to access the mount. It could also mean that we tried to mount
2312 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2313 * existing mount programs don't handle -EACCES very well so it should
2314 * be mapped to -EPERM instead.
2316 if (status == -EACCES)
2322 * get the file handle for the "/" directory on the server
2324 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2325 struct nfs_fsinfo *info)
2327 int minor_version = server->nfs_client->cl_minorversion;
2328 int status = nfs4_lookup_root(server, fhandle, info);
2329 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2331 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2332 * by nfs4_map_errors() as this function exits.
2334 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2336 status = nfs4_server_capabilities(server, fhandle);
2338 status = nfs4_do_fsinfo(server, fhandle, info);
2339 return nfs4_map_errors(status);
2342 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
2344 * Get locations and (maybe) other attributes of a referral.
2345 * Note that we'll actually follow the referral later when
2346 * we detect fsid mismatch in inode revalidation
2348 static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2349 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2351 int status = -ENOMEM;
2352 struct page *page = NULL;
2353 struct nfs4_fs_locations *locations = NULL;
2355 page = alloc_page(GFP_KERNEL);
2358 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2359 if (locations == NULL)
2362 status = nfs4_proc_fs_locations(dir, name, locations, page);
2365 /* Make sure server returned a different fsid for the referral */
2366 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2367 dprintk("%s: server did not return a different fsid for"
2368 " a referral at %s\n", __func__, name->name);
2372 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2373 nfs_fixup_referral_attributes(&locations->fattr);
2375 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2376 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2377 memset(fhandle, 0, sizeof(struct nfs_fh));
2385 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2387 struct nfs4_getattr_arg args = {
2389 .bitmask = server->attr_bitmask,
2391 struct nfs4_getattr_res res = {
2395 struct rpc_message msg = {
2396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2401 nfs_fattr_init(fattr);
2402 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2405 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2407 struct nfs4_exception exception = { };
2410 err = nfs4_handle_exception(server,
2411 _nfs4_proc_getattr(server, fhandle, fattr),
2413 } while (exception.retry);
2418 * The file is not closed if it is opened due to the a request to change
2419 * the size of the file. The open call will not be needed once the
2420 * VFS layer lookup-intents are implemented.
2422 * Close is called when the inode is destroyed.
2423 * If we haven't opened the file for O_WRONLY, we
2424 * need to in the size_change case to obtain a stateid.
2427 * Because OPEN is always done by name in nfsv4, it is
2428 * possible that we opened a different file by the same
2429 * name. We can recognize this race condition, but we
2430 * can't do anything about it besides returning an error.
2432 * This will be fixed with VFS changes (lookup-intent).
2435 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2436 struct iattr *sattr)
2438 struct inode *inode = dentry->d_inode;
2439 struct rpc_cred *cred = NULL;
2440 struct nfs4_state *state = NULL;
2443 if (pnfs_ld_layoutret_on_setattr(inode))
2444 pnfs_return_layout(inode);
2446 nfs_fattr_init(fattr);
2448 /* Search for an existing open(O_WRITE) file */
2449 if (sattr->ia_valid & ATTR_FILE) {
2450 struct nfs_open_context *ctx;
2452 ctx = nfs_file_open_context(sattr->ia_file);
2459 /* Deal with open(O_TRUNC) */
2460 if (sattr->ia_valid & ATTR_OPEN)
2461 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2463 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2465 nfs_setattr_update_inode(inode, sattr);
2469 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2470 const struct qstr *name, struct nfs_fh *fhandle,
2471 struct nfs_fattr *fattr)
2473 struct nfs_server *server = NFS_SERVER(dir);
2475 struct nfs4_lookup_arg args = {
2476 .bitmask = server->attr_bitmask,
2477 .dir_fh = NFS_FH(dir),
2480 struct nfs4_lookup_res res = {
2485 struct rpc_message msg = {
2486 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2491 nfs_fattr_init(fattr);
2493 dprintk("NFS call lookup %s\n", name->name);
2494 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2495 dprintk("NFS reply lookup: %d\n", status);
2499 void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2501 memset(fh, 0, sizeof(struct nfs_fh));
2502 fattr->fsid.major = 1;
2503 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2504 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2505 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2509 static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2510 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2512 struct nfs4_exception exception = { };
2517 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2519 case -NFS4ERR_BADNAME:
2521 case -NFS4ERR_MOVED:
2522 return nfs4_get_referral(dir, name, fattr, fhandle);
2523 case -NFS4ERR_WRONGSEC:
2524 nfs_fixup_secinfo_attributes(fattr, fhandle);
2526 err = nfs4_handle_exception(NFS_SERVER(dir),
2527 status, &exception);
2528 } while (exception.retry);
2532 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2534 struct nfs_server *server = NFS_SERVER(inode);
2535 struct nfs4_accessargs args = {
2536 .fh = NFS_FH(inode),
2537 .bitmask = server->cache_consistency_bitmask,
2539 struct nfs4_accessres res = {
2542 struct rpc_message msg = {
2543 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2546 .rpc_cred = entry->cred,
2548 int mode = entry->mask;
2552 * Determine which access bits we want to ask for...
2554 if (mode & MAY_READ)
2555 args.access |= NFS4_ACCESS_READ;
2556 if (S_ISDIR(inode->i_mode)) {
2557 if (mode & MAY_WRITE)
2558 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2559 if (mode & MAY_EXEC)
2560 args.access |= NFS4_ACCESS_LOOKUP;
2562 if (mode & MAY_WRITE)
2563 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2564 if (mode & MAY_EXEC)
2565 args.access |= NFS4_ACCESS_EXECUTE;
2568 res.fattr = nfs_alloc_fattr();
2569 if (res.fattr == NULL)
2572 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2575 if (res.access & NFS4_ACCESS_READ)
2576 entry->mask |= MAY_READ;
2577 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2578 entry->mask |= MAY_WRITE;
2579 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2580 entry->mask |= MAY_EXEC;
2581 nfs_refresh_inode(inode, res.fattr);
2583 nfs_free_fattr(res.fattr);
2587 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2589 struct nfs4_exception exception = { };
2592 err = nfs4_handle_exception(NFS_SERVER(inode),
2593 _nfs4_proc_access(inode, entry),
2595 } while (exception.retry);
2600 * TODO: For the time being, we don't try to get any attributes
2601 * along with any of the zero-copy operations READ, READDIR,
2604 * In the case of the first three, we want to put the GETATTR
2605 * after the read-type operation -- this is because it is hard
2606 * to predict the length of a GETATTR response in v4, and thus
2607 * align the READ data correctly. This means that the GETATTR
2608 * may end up partially falling into the page cache, and we should
2609 * shift it into the 'tail' of the xdr_buf before processing.
2610 * To do this efficiently, we need to know the total length
2611 * of data received, which doesn't seem to be available outside
2614 * In the case of WRITE, we also want to put the GETATTR after
2615 * the operation -- in this case because we want to make sure
2616 * we get the post-operation mtime and size. This means that
2617 * we can't use xdr_encode_pages() as written: we need a variant
2618 * of it which would leave room in the 'tail' iovec.
2620 * Both of these changes to the XDR layer would in fact be quite
2621 * minor, but I decided to leave them for a subsequent patch.
2623 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2624 unsigned int pgbase, unsigned int pglen)
2626 struct nfs4_readlink args = {
2627 .fh = NFS_FH(inode),
2632 struct nfs4_readlink_res res;
2633 struct rpc_message msg = {
2634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2639 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2642 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2643 unsigned int pgbase, unsigned int pglen)
2645 struct nfs4_exception exception = { };
2648 err = nfs4_handle_exception(NFS_SERVER(inode),
2649 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2651 } while (exception.retry);
2657 * We will need to arrange for the VFS layer to provide an atomic open.
2658 * Until then, this create/open method is prone to inefficiency and race
2659 * conditions due to the lookup, create, and open VFS calls from sys_open()
2660 * placed on the wire.
2662 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2663 * The file will be opened again in the subsequent VFS open call
2664 * (nfs4_proc_file_open).
2666 * The open for read will just hang around to be used by any process that
2667 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2671 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2672 int flags, struct nfs_open_context *ctx)
2674 struct dentry *de = dentry;
2675 struct nfs4_state *state;
2676 struct rpc_cred *cred = NULL;
2685 sattr->ia_mode &= ~current_umask();
2686 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2688 if (IS_ERR(state)) {
2689 status = PTR_ERR(state);
2692 d_add(dentry, igrab(state->inode));
2693 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2697 nfs4_close_sync(state, fmode);
2702 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2704 struct nfs_server *server = NFS_SERVER(dir);
2705 struct nfs_removeargs args = {
2707 .name.len = name->len,
2708 .name.name = name->name,
2709 .bitmask = server->attr_bitmask,
2711 struct nfs_removeres res = {
2714 struct rpc_message msg = {
2715 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2719 int status = -ENOMEM;
2721 res.dir_attr = nfs_alloc_fattr();
2722 if (res.dir_attr == NULL)
2725 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2727 update_changeattr(dir, &res.cinfo);
2728 nfs_post_op_update_inode(dir, res.dir_attr);
2730 nfs_free_fattr(res.dir_attr);
2735 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2737 struct nfs4_exception exception = { };
2740 err = nfs4_handle_exception(NFS_SERVER(dir),
2741 _nfs4_proc_remove(dir, name),
2743 } while (exception.retry);
2747 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2749 struct nfs_server *server = NFS_SERVER(dir);
2750 struct nfs_removeargs *args = msg->rpc_argp;
2751 struct nfs_removeres *res = msg->rpc_resp;
2753 args->bitmask = server->cache_consistency_bitmask;
2754 res->server = server;
2755 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2756 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2759 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2761 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2763 if (!nfs4_sequence_done(task, &res->seq_res))
2765 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2767 update_changeattr(dir, &res->cinfo);
2768 nfs_post_op_update_inode(dir, res->dir_attr);
2772 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2774 struct nfs_server *server = NFS_SERVER(dir);
2775 struct nfs_renameargs *arg = msg->rpc_argp;
2776 struct nfs_renameres *res = msg->rpc_resp;
2778 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2779 arg->bitmask = server->attr_bitmask;
2780 res->server = server;
2781 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2784 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2785 struct inode *new_dir)
2787 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2789 if (!nfs4_sequence_done(task, &res->seq_res))
2791 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2794 update_changeattr(old_dir, &res->old_cinfo);
2795 nfs_post_op_update_inode(old_dir, res->old_fattr);
2796 update_changeattr(new_dir, &res->new_cinfo);
2797 nfs_post_op_update_inode(new_dir, res->new_fattr);
2801 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2802 struct inode *new_dir, struct qstr *new_name)
2804 struct nfs_server *server = NFS_SERVER(old_dir);
2805 struct nfs_renameargs arg = {
2806 .old_dir = NFS_FH(old_dir),
2807 .new_dir = NFS_FH(new_dir),
2808 .old_name = old_name,
2809 .new_name = new_name,
2810 .bitmask = server->attr_bitmask,
2812 struct nfs_renameres res = {
2815 struct rpc_message msg = {
2816 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2820 int status = -ENOMEM;
2822 res.old_fattr = nfs_alloc_fattr();
2823 res.new_fattr = nfs_alloc_fattr();
2824 if (res.old_fattr == NULL || res.new_fattr == NULL)
2827 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2829 update_changeattr(old_dir, &res.old_cinfo);
2830 nfs_post_op_update_inode(old_dir, res.old_fattr);
2831 update_changeattr(new_dir, &res.new_cinfo);
2832 nfs_post_op_update_inode(new_dir, res.new_fattr);
2835 nfs_free_fattr(res.new_fattr);
2836 nfs_free_fattr(res.old_fattr);
2840 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2841 struct inode *new_dir, struct qstr *new_name)
2843 struct nfs4_exception exception = { };
2846 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2847 _nfs4_proc_rename(old_dir, old_name,
2850 } while (exception.retry);
2854 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2856 struct nfs_server *server = NFS_SERVER(inode);
2857 struct nfs4_link_arg arg = {
2858 .fh = NFS_FH(inode),
2859 .dir_fh = NFS_FH(dir),
2861 .bitmask = server->attr_bitmask,
2863 struct nfs4_link_res res = {
2866 struct rpc_message msg = {
2867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2871 int status = -ENOMEM;
2873 res.fattr = nfs_alloc_fattr();
2874 res.dir_attr = nfs_alloc_fattr();
2875 if (res.fattr == NULL || res.dir_attr == NULL)
2878 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2880 update_changeattr(dir, &res.cinfo);
2881 nfs_post_op_update_inode(dir, res.dir_attr);
2882 nfs_post_op_update_inode(inode, res.fattr);
2885 nfs_free_fattr(res.dir_attr);
2886 nfs_free_fattr(res.fattr);
2890 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2892 struct nfs4_exception exception = { };
2895 err = nfs4_handle_exception(NFS_SERVER(inode),
2896 _nfs4_proc_link(inode, dir, name),
2898 } while (exception.retry);
2902 struct nfs4_createdata {
2903 struct rpc_message msg;
2904 struct nfs4_create_arg arg;
2905 struct nfs4_create_res res;
2907 struct nfs_fattr fattr;
2908 struct nfs_fattr dir_fattr;
2911 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2912 struct qstr *name, struct iattr *sattr, u32 ftype)
2914 struct nfs4_createdata *data;
2916 data = kzalloc(sizeof(*data), GFP_KERNEL);
2918 struct nfs_server *server = NFS_SERVER(dir);
2920 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2921 data->msg.rpc_argp = &data->arg;
2922 data->msg.rpc_resp = &data->res;
2923 data->arg.dir_fh = NFS_FH(dir);
2924 data->arg.server = server;
2925 data->arg.name = name;
2926 data->arg.attrs = sattr;
2927 data->arg.ftype = ftype;
2928 data->arg.bitmask = server->attr_bitmask;
2929 data->res.server = server;
2930 data->res.fh = &data->fh;
2931 data->res.fattr = &data->fattr;
2932 data->res.dir_fattr = &data->dir_fattr;
2933 nfs_fattr_init(data->res.fattr);
2934 nfs_fattr_init(data->res.dir_fattr);
2939 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2941 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2942 &data->arg.seq_args, &data->res.seq_res, 1);
2944 update_changeattr(dir, &data->res.dir_cinfo);
2945 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2946 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2951 static void nfs4_free_createdata(struct nfs4_createdata *data)
2956 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2957 struct page *page, unsigned int len, struct iattr *sattr)
2959 struct nfs4_createdata *data;
2960 int status = -ENAMETOOLONG;
2962 if (len > NFS4_MAXPATHLEN)
2966 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2970 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2971 data->arg.u.symlink.pages = &page;
2972 data->arg.u.symlink.len = len;
2974 status = nfs4_do_create(dir, dentry, data);
2976 nfs4_free_createdata(data);
2981 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2982 struct page *page, unsigned int len, struct iattr *sattr)
2984 struct nfs4_exception exception = { };
2987 err = nfs4_handle_exception(NFS_SERVER(dir),
2988 _nfs4_proc_symlink(dir, dentry, page,
2991 } while (exception.retry);
2995 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2996 struct iattr *sattr)
2998 struct nfs4_createdata *data;
2999 int status = -ENOMEM;
3001 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3005 status = nfs4_do_create(dir, dentry, data);
3007 nfs4_free_createdata(data);
3012 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3013 struct iattr *sattr)
3015 struct nfs4_exception exception = { };
3018 sattr->ia_mode &= ~current_umask();
3020 err = nfs4_handle_exception(NFS_SERVER(dir),
3021 _nfs4_proc_mkdir(dir, dentry, sattr),
3023 } while (exception.retry);
3027 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3028 u64 cookie, struct page **pages, unsigned int count, int plus)
3030 struct inode *dir = dentry->d_inode;
3031 struct nfs4_readdir_arg args = {
3036 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3039 struct nfs4_readdir_res res;
3040 struct rpc_message msg = {
3041 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3048 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3049 dentry->d_parent->d_name.name,
3050 dentry->d_name.name,
3051 (unsigned long long)cookie);
3052 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3053 res.pgbase = args.pgbase;
3054 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3056 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3057 status += args.pgbase;
3060 nfs_invalidate_atime(dir);
3062 dprintk("%s: returns %d\n", __func__, status);
3066 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3067 u64 cookie, struct page **pages, unsigned int count, int plus)
3069 struct nfs4_exception exception = { };
3072 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3073 _nfs4_proc_readdir(dentry, cred, cookie,
3074 pages, count, plus),
3076 } while (exception.retry);
3080 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3081 struct iattr *sattr, dev_t rdev)
3083 struct nfs4_createdata *data;
3084 int mode = sattr->ia_mode;
3085 int status = -ENOMEM;
3087 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3088 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3090 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3095 data->arg.ftype = NF4FIFO;
3096 else if (S_ISBLK(mode)) {
3097 data->arg.ftype = NF4BLK;
3098 data->arg.u.device.specdata1 = MAJOR(rdev);
3099 data->arg.u.device.specdata2 = MINOR(rdev);
3101 else if (S_ISCHR(mode)) {
3102 data->arg.ftype = NF4CHR;
3103 data->arg.u.device.specdata1 = MAJOR(rdev);
3104 data->arg.u.device.specdata2 = MINOR(rdev);
3107 status = nfs4_do_create(dir, dentry, data);
3109 nfs4_free_createdata(data);
3114 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3115 struct iattr *sattr, dev_t rdev)
3117 struct nfs4_exception exception = { };
3120 sattr->ia_mode &= ~current_umask();
3122 err = nfs4_handle_exception(NFS_SERVER(dir),
3123 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3125 } while (exception.retry);
3129 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3130 struct nfs_fsstat *fsstat)
3132 struct nfs4_statfs_arg args = {
3134 .bitmask = server->attr_bitmask,
3136 struct nfs4_statfs_res res = {
3139 struct rpc_message msg = {
3140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3145 nfs_fattr_init(fsstat->fattr);
3146 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3149 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3151 struct nfs4_exception exception = { };
3154 err = nfs4_handle_exception(server,
3155 _nfs4_proc_statfs(server, fhandle, fsstat),
3157 } while (exception.retry);
3161 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3162 struct nfs_fsinfo *fsinfo)
3164 struct nfs4_fsinfo_arg args = {
3166 .bitmask = server->attr_bitmask,
3168 struct nfs4_fsinfo_res res = {
3171 struct rpc_message msg = {
3172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3177 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3180 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3182 struct nfs4_exception exception = { };
3186 err = nfs4_handle_exception(server,
3187 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3189 } while (exception.retry);
3193 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3195 nfs_fattr_init(fsinfo->fattr);
3196 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3199 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3200 struct nfs_pathconf *pathconf)
3202 struct nfs4_pathconf_arg args = {
3204 .bitmask = server->attr_bitmask,
3206 struct nfs4_pathconf_res res = {
3207 .pathconf = pathconf,
3209 struct rpc_message msg = {
3210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3215 /* None of the pathconf attributes are mandatory to implement */
3216 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3217 memset(pathconf, 0, sizeof(*pathconf));
3221 nfs_fattr_init(pathconf->fattr);
3222 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3225 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3226 struct nfs_pathconf *pathconf)
3228 struct nfs4_exception exception = { };
3232 err = nfs4_handle_exception(server,
3233 _nfs4_proc_pathconf(server, fhandle, pathconf),
3235 } while (exception.retry);
3239 void __nfs4_read_done_cb(struct nfs_read_data *data)
3241 nfs_invalidate_atime(data->inode);
3244 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3246 struct nfs_server *server = NFS_SERVER(data->inode);
3248 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3249 rpc_restart_call_prepare(task);
3253 __nfs4_read_done_cb(data);
3254 if (task->tk_status > 0)
3255 renew_lease(server, data->timestamp);
3259 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3262 dprintk("--> %s\n", __func__);
3264 if (!nfs4_sequence_done(task, &data->res.seq_res))
3267 return data->read_done_cb ? data->read_done_cb(task, data) :
3268 nfs4_read_done_cb(task, data);
3271 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3273 data->timestamp = jiffies;
3274 data->read_done_cb = nfs4_read_done_cb;
3275 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3276 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3279 /* Reset the the nfs_read_data to send the read to the MDS. */
3280 void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3282 dprintk("%s Reset task for i/o through\n", __func__);
3283 put_lseg(data->lseg);
3285 /* offsets will differ in the dense stripe case */
3286 data->args.offset = data->mds_offset;
3287 data->ds_clp = NULL;
3288 data->args.fh = NFS_FH(data->inode);
3289 data->read_done_cb = nfs4_read_done_cb;
3290 task->tk_ops = data->mds_ops;
3291 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3293 EXPORT_SYMBOL_GPL(nfs4_reset_read);
3295 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3297 struct inode *inode = data->inode;
3299 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3300 rpc_restart_call_prepare(task);
3303 if (task->tk_status >= 0) {
3304 renew_lease(NFS_SERVER(inode), data->timestamp);
3305 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3310 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3312 if (!nfs4_sequence_done(task, &data->res.seq_res))
3314 return data->write_done_cb ? data->write_done_cb(task, data) :
3315 nfs4_write_done_cb(task, data);
3318 /* Reset the the nfs_write_data to send the write to the MDS. */
3319 void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3321 dprintk("%s Reset task for i/o through\n", __func__);
3322 put_lseg(data->lseg);
3324 data->ds_clp = NULL;
3325 data->write_done_cb = nfs4_write_done_cb;
3326 data->args.fh = NFS_FH(data->inode);
3327 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3328 data->args.offset = data->mds_offset;
3329 data->res.fattr = &data->fattr;
3330 task->tk_ops = data->mds_ops;
3331 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3333 EXPORT_SYMBOL_GPL(nfs4_reset_write);
3335 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3337 struct nfs_server *server = NFS_SERVER(data->inode);
3340 data->args.bitmask = NULL;
3341 data->res.fattr = NULL;
3343 data->args.bitmask = server->cache_consistency_bitmask;
3344 if (!data->write_done_cb)
3345 data->write_done_cb = nfs4_write_done_cb;
3346 data->res.server = server;
3347 data->timestamp = jiffies;
3349 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3350 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3353 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3355 struct inode *inode = data->inode;
3357 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3358 rpc_restart_call_prepare(task);
3361 nfs_refresh_inode(inode, data->res.fattr);
3365 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3367 if (!nfs4_sequence_done(task, &data->res.seq_res))
3369 return data->write_done_cb(task, data);
3372 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3374 struct nfs_server *server = NFS_SERVER(data->inode);
3377 data->args.bitmask = NULL;
3378 data->res.fattr = NULL;
3380 data->args.bitmask = server->cache_consistency_bitmask;
3381 if (!data->write_done_cb)
3382 data->write_done_cb = nfs4_commit_done_cb;
3383 data->res.server = server;
3384 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3385 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3388 struct nfs4_renewdata {
3389 struct nfs_client *client;
3390 unsigned long timestamp;
3394 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3395 * standalone procedure for queueing an asynchronous RENEW.
3397 static void nfs4_renew_release(void *calldata)
3399 struct nfs4_renewdata *data = calldata;
3400 struct nfs_client *clp = data->client;
3402 if (atomic_read(&clp->cl_count) > 1)
3403 nfs4_schedule_state_renewal(clp);
3404 nfs_put_client(clp);
3408 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3410 struct nfs4_renewdata *data = calldata;
3411 struct nfs_client *clp = data->client;
3412 unsigned long timestamp = data->timestamp;
3414 if (task->tk_status < 0) {
3415 /* Unless we're shutting down, schedule state recovery! */
3416 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3418 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3419 nfs4_schedule_lease_recovery(clp);
3422 nfs4_schedule_path_down_recovery(clp);
3424 do_renew_lease(clp, timestamp);
3427 static const struct rpc_call_ops nfs4_renew_ops = {
3428 .rpc_call_done = nfs4_renew_done,
3429 .rpc_release = nfs4_renew_release,
3432 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3434 struct rpc_message msg = {
3435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3439 struct nfs4_renewdata *data;
3441 if (renew_flags == 0)
3443 if (!atomic_inc_not_zero(&clp->cl_count))
3445 data = kmalloc(sizeof(*data), GFP_NOFS);
3449 data->timestamp = jiffies;
3450 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3451 &nfs4_renew_ops, data);
3454 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3456 struct rpc_message msg = {
3457 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3461 unsigned long now = jiffies;
3464 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3467 do_renew_lease(clp, now);
3471 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3473 return (server->caps & NFS_CAP_ACLS)
3474 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3475 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3478 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3479 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3482 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3484 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3485 struct page **pages, unsigned int *pgbase)
3487 struct page *newpage, **spages;
3493 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3494 newpage = alloc_page(GFP_KERNEL);
3496 if (newpage == NULL)
3498 memcpy(page_address(newpage), buf, len);
3503 } while (buflen != 0);
3509 __free_page(spages[rc-1]);
3513 struct nfs4_cached_acl {
3519 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3521 struct nfs_inode *nfsi = NFS_I(inode);
3523 spin_lock(&inode->i_lock);
3524 kfree(nfsi->nfs4_acl);
3525 nfsi->nfs4_acl = acl;
3526 spin_unlock(&inode->i_lock);
3529 static void nfs4_zap_acl_attr(struct inode *inode)
3531 nfs4_set_cached_acl(inode, NULL);
3534 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3536 struct nfs_inode *nfsi = NFS_I(inode);
3537 struct nfs4_cached_acl *acl;
3540 spin_lock(&inode->i_lock);
3541 acl = nfsi->nfs4_acl;
3544 if (buf == NULL) /* user is just asking for length */
3546 if (acl->cached == 0)
3548 ret = -ERANGE; /* see getxattr(2) man page */
3549 if (acl->len > buflen)
3551 memcpy(buf, acl->data, acl->len);
3555 spin_unlock(&inode->i_lock);
3559 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3561 struct nfs4_cached_acl *acl;
3563 if (buf && acl_len <= PAGE_SIZE) {
3564 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3568 memcpy(acl->data, buf, acl_len);
3570 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3577 nfs4_set_cached_acl(inode, acl);
3581 * The getxattr API returns the required buffer length when called with a
3582 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3583 * the required buf. On a NULL buf, we send a page of data to the server
3584 * guessing that the ACL request can be serviced by a page. If so, we cache
3585 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3586 * the cache. If not so, we throw away the page, and cache the required
3587 * length. The next getxattr call will then produce another round trip to
3588 * the server, this time with the input buf of the required size.
3590 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3592 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3593 struct nfs_getaclargs args = {
3594 .fh = NFS_FH(inode),
3598 struct nfs_getaclres res = {
3602 struct rpc_message msg = {
3603 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3607 int ret = -ENOMEM, npages, i, acl_len = 0;
3609 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3610 /* As long as we're doing a round trip to the server anyway,
3611 * let's be prepared for a page of acl data. */
3615 for (i = 0; i < npages; i++) {
3616 pages[i] = alloc_page(GFP_KERNEL);
3621 /* for decoding across pages */
3622 args.acl_scratch = alloc_page(GFP_KERNEL);
3623 if (!args.acl_scratch)
3626 args.acl_len = npages * PAGE_SIZE;
3627 args.acl_pgbase = 0;
3628 /* Let decode_getfacl know not to fail if the ACL data is larger than
3629 * the page we send as a guess */
3631 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3632 resp_buf = page_address(pages[0]);
3634 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3635 __func__, buf, buflen, npages, args.acl_len);
3636 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3637 &msg, &args.seq_args, &res.seq_res, 0);
3641 acl_len = res.acl_len - res.acl_data_offset;
3642 if (acl_len > args.acl_len)
3643 nfs4_write_cached_acl(inode, NULL, acl_len);
3645 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3649 if (acl_len > buflen)
3651 _copy_from_pages(buf, pages, res.acl_data_offset,
3656 for (i = 0; i < npages; i++)
3658 __free_page(pages[i]);
3659 if (args.acl_scratch)
3660 __free_page(args.acl_scratch);
3664 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3666 struct nfs4_exception exception = { };
3669 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3672 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3673 } while (exception.retry);
3677 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3679 struct nfs_server *server = NFS_SERVER(inode);
3682 if (!nfs4_server_supports_acls(server))
3684 ret = nfs_revalidate_inode(server, inode);
3687 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3688 nfs_zap_acl_cache(inode);
3689 ret = nfs4_read_cached_acl(inode, buf, buflen);
3691 /* -ENOENT is returned if there is no ACL or if there is an ACL
3692 * but no cached acl data, just the acl length */
3694 return nfs4_get_acl_uncached(inode, buf, buflen);
3697 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3699 struct nfs_server *server = NFS_SERVER(inode);
3700 struct page *pages[NFS4ACL_MAXPAGES];
3701 struct nfs_setaclargs arg = {
3702 .fh = NFS_FH(inode),
3706 struct nfs_setaclres res;
3707 struct rpc_message msg = {
3708 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3714 if (!nfs4_server_supports_acls(server))
3716 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3719 nfs_inode_return_delegation(inode);
3720 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3723 * Free each page after tx, so the only ref left is
3724 * held by the network stack
3727 put_page(pages[i-1]);
3730 * Acl update can result in inode attribute update.
3731 * so mark the attribute cache invalid.
3733 spin_lock(&inode->i_lock);
3734 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3735 spin_unlock(&inode->i_lock);
3736 nfs_access_zap_cache(inode);
3737 nfs_zap_acl_cache(inode);
3741 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3743 struct nfs4_exception exception = { };
3746 err = nfs4_handle_exception(NFS_SERVER(inode),
3747 __nfs4_proc_set_acl(inode, buf, buflen),
3749 } while (exception.retry);
3754 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3756 struct nfs_client *clp = server->nfs_client;
3758 if (task->tk_status >= 0)
3760 switch(task->tk_status) {
3761 case -NFS4ERR_ADMIN_REVOKED:
3762 case -NFS4ERR_BAD_STATEID:
3763 case -NFS4ERR_OPENMODE:
3766 nfs4_schedule_stateid_recovery(server, state);
3767 goto wait_on_recovery;
3768 case -NFS4ERR_EXPIRED:
3770 nfs4_schedule_stateid_recovery(server, state);
3771 case -NFS4ERR_STALE_STATEID:
3772 case -NFS4ERR_STALE_CLIENTID:
3773 nfs4_schedule_lease_recovery(clp);
3774 goto wait_on_recovery;
3775 #if defined(CONFIG_NFS_V4_1)
3776 case -NFS4ERR_BADSESSION:
3777 case -NFS4ERR_BADSLOT:
3778 case -NFS4ERR_BAD_HIGH_SLOT:
3779 case -NFS4ERR_DEADSESSION:
3780 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3781 case -NFS4ERR_SEQ_FALSE_RETRY:
3782 case -NFS4ERR_SEQ_MISORDERED:
3783 dprintk("%s ERROR %d, Reset session\n", __func__,
3785 nfs4_schedule_session_recovery(clp->cl_session);
3786 task->tk_status = 0;
3788 #endif /* CONFIG_NFS_V4_1 */
3789 case -NFS4ERR_DELAY:
3790 nfs_inc_server_stats(server, NFSIOS_DELAY);
3791 case -NFS4ERR_GRACE:
3793 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3794 task->tk_status = 0;
3796 case -NFS4ERR_RETRY_UNCACHED_REP:
3797 case -NFS4ERR_OLD_STATEID:
3798 task->tk_status = 0;
3801 task->tk_status = nfs4_map_errors(task->tk_status);
3804 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3805 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3806 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3807 task->tk_status = 0;
3811 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3812 unsigned short port, struct rpc_cred *cred,
3813 struct nfs4_setclientid_res *res)
3815 nfs4_verifier sc_verifier;
3816 struct nfs4_setclientid setclientid = {
3817 .sc_verifier = &sc_verifier,
3819 .sc_cb_ident = clp->cl_cb_ident,
3821 struct rpc_message msg = {
3822 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3823 .rpc_argp = &setclientid,
3831 p = (__be32*)sc_verifier.data;
3832 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3833 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3837 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3838 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3840 rpc_peeraddr2str(clp->cl_rpcclient,
3842 rpc_peeraddr2str(clp->cl_rpcclient,
3844 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3845 clp->cl_id_uniquifier);
3846 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3847 sizeof(setclientid.sc_netid),
3848 rpc_peeraddr2str(clp->cl_rpcclient,
3849 RPC_DISPLAY_NETID));
3850 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3851 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3852 clp->cl_ipaddr, port >> 8, port & 255);
3855 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3856 if (status != -NFS4ERR_CLID_INUSE)
3859 ++clp->cl_id_uniquifier;
3863 ssleep(clp->cl_lease_time / HZ + 1);
3868 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3869 struct nfs4_setclientid_res *arg,
3870 struct rpc_cred *cred)
3872 struct nfs_fsinfo fsinfo;
3873 struct rpc_message msg = {
3874 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3876 .rpc_resp = &fsinfo,
3883 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3885 spin_lock(&clp->cl_lock);
3886 clp->cl_lease_time = fsinfo.lease_time * HZ;
3887 clp->cl_last_renewal = now;
3888 spin_unlock(&clp->cl_lock);
3893 struct nfs4_delegreturndata {
3894 struct nfs4_delegreturnargs args;
3895 struct nfs4_delegreturnres res;
3897 nfs4_stateid stateid;
3898 unsigned long timestamp;
3899 struct nfs_fattr fattr;
3903 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3905 struct nfs4_delegreturndata *data = calldata;
3907 if (!nfs4_sequence_done(task, &data->res.seq_res))
3910 switch (task->tk_status) {
3911 case -NFS4ERR_STALE_STATEID:
3912 case -NFS4ERR_EXPIRED:
3914 renew_lease(data->res.server, data->timestamp);
3917 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3919 rpc_restart_call_prepare(task);
3923 data->rpc_status = task->tk_status;
3926 static void nfs4_delegreturn_release(void *calldata)
3931 #if defined(CONFIG_NFS_V4_1)
3932 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3934 struct nfs4_delegreturndata *d_data;
3936 d_data = (struct nfs4_delegreturndata *)data;
3938 if (nfs4_setup_sequence(d_data->res.server,
3939 &d_data->args.seq_args,
3940 &d_data->res.seq_res, task))
3942 rpc_call_start(task);
3944 #endif /* CONFIG_NFS_V4_1 */
3946 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3947 #if defined(CONFIG_NFS_V4_1)
3948 .rpc_call_prepare = nfs4_delegreturn_prepare,
3949 #endif /* CONFIG_NFS_V4_1 */
3950 .rpc_call_done = nfs4_delegreturn_done,
3951 .rpc_release = nfs4_delegreturn_release,
3954 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3956 struct nfs4_delegreturndata *data;
3957 struct nfs_server *server = NFS_SERVER(inode);
3958 struct rpc_task *task;
3959 struct rpc_message msg = {
3960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3963 struct rpc_task_setup task_setup_data = {
3964 .rpc_client = server->client,
3965 .rpc_message = &msg,
3966 .callback_ops = &nfs4_delegreturn_ops,
3967 .flags = RPC_TASK_ASYNC,
3971 data = kzalloc(sizeof(*data), GFP_NOFS);
3974 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3975 data->args.fhandle = &data->fh;
3976 data->args.stateid = &data->stateid;
3977 data->args.bitmask = server->attr_bitmask;
3978 nfs_copy_fh(&data->fh, NFS_FH(inode));
3979 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3980 data->res.fattr = &data->fattr;
3981 data->res.server = server;
3982 nfs_fattr_init(data->res.fattr);
3983 data->timestamp = jiffies;
3984 data->rpc_status = 0;
3986 task_setup_data.callback_data = data;
3987 msg.rpc_argp = &data->args;
3988 msg.rpc_resp = &data->res;
3989 task = rpc_run_task(&task_setup_data);
3991 return PTR_ERR(task);
3994 status = nfs4_wait_for_completion_rpc_task(task);
3997 status = data->rpc_status;
4000 nfs_refresh_inode(inode, &data->fattr);
4006 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4008 struct nfs_server *server = NFS_SERVER(inode);
4009 struct nfs4_exception exception = { };
4012 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4014 case -NFS4ERR_STALE_STATEID:
4015 case -NFS4ERR_EXPIRED:
4019 err = nfs4_handle_exception(server, err, &exception);
4020 } while (exception.retry);
4024 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4025 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4028 * sleep, with exponential backoff, and retry the LOCK operation.
4030 static unsigned long
4031 nfs4_set_lock_task_retry(unsigned long timeout)
4033 freezable_schedule_timeout_killable(timeout);
4035 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4036 return NFS4_LOCK_MAXTIMEOUT;
4040 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4042 struct inode *inode = state->inode;
4043 struct nfs_server *server = NFS_SERVER(inode);
4044 struct nfs_client *clp = server->nfs_client;
4045 struct nfs_lockt_args arg = {
4046 .fh = NFS_FH(inode),
4049 struct nfs_lockt_res res = {
4052 struct rpc_message msg = {
4053 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4056 .rpc_cred = state->owner->so_cred,
4058 struct nfs4_lock_state *lsp;
4061 arg.lock_owner.clientid = clp->cl_clientid;
4062 status = nfs4_set_lock_state(state, request);
4065 lsp = request->fl_u.nfs4_fl.owner;
4066 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4067 arg.lock_owner.s_dev = server->s_dev;
4068 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4071 request->fl_type = F_UNLCK;
4073 case -NFS4ERR_DENIED:
4076 request->fl_ops->fl_release_private(request);
4081 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4083 struct nfs4_exception exception = { };
4087 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4088 _nfs4_proc_getlk(state, cmd, request),
4090 } while (exception.retry);
4094 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4097 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4099 res = posix_lock_file_wait(file, fl);
4102 res = flock_lock_file_wait(file, fl);
4110 struct nfs4_unlockdata {
4111 struct nfs_locku_args arg;
4112 struct nfs_locku_res res;
4113 struct nfs4_lock_state *lsp;
4114 struct nfs_open_context *ctx;
4115 struct file_lock fl;
4116 const struct nfs_server *server;
4117 unsigned long timestamp;
4120 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4121 struct nfs_open_context *ctx,
4122 struct nfs4_lock_state *lsp,
4123 struct nfs_seqid *seqid)
4125 struct nfs4_unlockdata *p;
4126 struct inode *inode = lsp->ls_state->inode;
4128 p = kzalloc(sizeof(*p), GFP_NOFS);
4131 p->arg.fh = NFS_FH(inode);
4133 p->arg.seqid = seqid;
4134 p->res.seqid = seqid;
4135 p->arg.stateid = &lsp->ls_stateid;
4137 atomic_inc(&lsp->ls_count);
4138 /* Ensure we don't close file until we're done freeing locks! */
4139 p->ctx = get_nfs_open_context(ctx);
4140 memcpy(&p->fl, fl, sizeof(p->fl));
4141 p->server = NFS_SERVER(inode);
4145 static void nfs4_locku_release_calldata(void *data)
4147 struct nfs4_unlockdata *calldata = data;
4148 nfs_free_seqid(calldata->arg.seqid);
4149 nfs4_put_lock_state(calldata->lsp);
4150 put_nfs_open_context(calldata->ctx);
4154 static void nfs4_locku_done(struct rpc_task *task, void *data)
4156 struct nfs4_unlockdata *calldata = data;
4158 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4160 switch (task->tk_status) {
4162 memcpy(calldata->lsp->ls_stateid.data,
4163 calldata->res.stateid.data,
4164 sizeof(calldata->lsp->ls_stateid.data));
4165 renew_lease(calldata->server, calldata->timestamp);
4167 case -NFS4ERR_BAD_STATEID:
4168 case -NFS4ERR_OLD_STATEID:
4169 case -NFS4ERR_STALE_STATEID:
4170 case -NFS4ERR_EXPIRED:
4173 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4174 rpc_restart_call_prepare(task);
4178 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4180 struct nfs4_unlockdata *calldata = data;
4182 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4184 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4185 /* Note: exit _without_ running nfs4_locku_done */
4186 task->tk_action = NULL;
4189 calldata->timestamp = jiffies;
4190 if (nfs4_setup_sequence(calldata->server,
4191 &calldata->arg.seq_args,
4192 &calldata->res.seq_res, task))
4194 rpc_call_start(task);
4197 static const struct rpc_call_ops nfs4_locku_ops = {
4198 .rpc_call_prepare = nfs4_locku_prepare,
4199 .rpc_call_done = nfs4_locku_done,
4200 .rpc_release = nfs4_locku_release_calldata,
4203 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4204 struct nfs_open_context *ctx,
4205 struct nfs4_lock_state *lsp,
4206 struct nfs_seqid *seqid)
4208 struct nfs4_unlockdata *data;
4209 struct rpc_message msg = {
4210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4211 .rpc_cred = ctx->cred,
4213 struct rpc_task_setup task_setup_data = {
4214 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4215 .rpc_message = &msg,
4216 .callback_ops = &nfs4_locku_ops,
4217 .workqueue = nfsiod_workqueue,
4218 .flags = RPC_TASK_ASYNC,
4221 /* Ensure this is an unlock - when canceling a lock, the
4222 * canceled lock is passed in, and it won't be an unlock.
4224 fl->fl_type = F_UNLCK;
4226 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4228 nfs_free_seqid(seqid);
4229 return ERR_PTR(-ENOMEM);
4232 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4233 msg.rpc_argp = &data->arg;
4234 msg.rpc_resp = &data->res;
4235 task_setup_data.callback_data = data;
4236 return rpc_run_task(&task_setup_data);
4239 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4241 struct nfs_inode *nfsi = NFS_I(state->inode);
4242 struct nfs_seqid *seqid;
4243 struct nfs4_lock_state *lsp;
4244 struct rpc_task *task;
4246 unsigned char fl_flags = request->fl_flags;
4248 status = nfs4_set_lock_state(state, request);
4249 /* Unlock _before_ we do the RPC call */
4250 request->fl_flags |= FL_EXISTS;
4251 down_read(&nfsi->rwsem);
4252 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4253 up_read(&nfsi->rwsem);
4256 up_read(&nfsi->rwsem);
4259 /* Is this a delegated lock? */
4260 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4262 lsp = request->fl_u.nfs4_fl.owner;
4263 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4267 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4268 status = PTR_ERR(task);
4271 status = nfs4_wait_for_completion_rpc_task(task);
4274 request->fl_flags = fl_flags;
4278 struct nfs4_lockdata {
4279 struct nfs_lock_args arg;
4280 struct nfs_lock_res res;
4281 struct nfs4_lock_state *lsp;
4282 struct nfs_open_context *ctx;
4283 struct file_lock fl;
4284 unsigned long timestamp;
4287 struct nfs_server *server;
4290 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4291 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4294 struct nfs4_lockdata *p;
4295 struct inode *inode = lsp->ls_state->inode;
4296 struct nfs_server *server = NFS_SERVER(inode);
4298 p = kzalloc(sizeof(*p), gfp_mask);
4302 p->arg.fh = NFS_FH(inode);
4304 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4305 if (p->arg.open_seqid == NULL)
4307 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4308 if (p->arg.lock_seqid == NULL)
4309 goto out_free_seqid;
4310 p->arg.lock_stateid = &lsp->ls_stateid;
4311 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4312 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4313 p->arg.lock_owner.s_dev = server->s_dev;
4314 p->res.lock_seqid = p->arg.lock_seqid;
4317 atomic_inc(&lsp->ls_count);
4318 p->ctx = get_nfs_open_context(ctx);
4319 memcpy(&p->fl, fl, sizeof(p->fl));
4322 nfs_free_seqid(p->arg.open_seqid);
4328 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4330 struct nfs4_lockdata *data = calldata;
4331 struct nfs4_state *state = data->lsp->ls_state;
4333 dprintk("%s: begin!\n", __func__);
4334 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4336 /* Do we need to do an open_to_lock_owner? */
4337 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4338 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4340 data->arg.open_stateid = &state->stateid;
4341 data->arg.new_lock_owner = 1;
4342 data->res.open_seqid = data->arg.open_seqid;
4344 data->arg.new_lock_owner = 0;
4345 data->timestamp = jiffies;
4346 if (nfs4_setup_sequence(data->server,
4347 &data->arg.seq_args,
4348 &data->res.seq_res, task))
4350 rpc_call_start(task);
4351 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4354 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4356 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4357 nfs4_lock_prepare(task, calldata);
4360 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4362 struct nfs4_lockdata *data = calldata;
4364 dprintk("%s: begin!\n", __func__);
4366 if (!nfs4_sequence_done(task, &data->res.seq_res))
4369 data->rpc_status = task->tk_status;
4370 if (data->arg.new_lock_owner != 0) {
4371 if (data->rpc_status == 0)
4372 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4376 if (data->rpc_status == 0) {
4377 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4378 sizeof(data->lsp->ls_stateid.data));
4379 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4380 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4383 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4386 static void nfs4_lock_release(void *calldata)
4388 struct nfs4_lockdata *data = calldata;
4390 dprintk("%s: begin!\n", __func__);
4391 nfs_free_seqid(data->arg.open_seqid);
4392 if (data->cancelled != 0) {
4393 struct rpc_task *task;
4394 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4395 data->arg.lock_seqid);
4397 rpc_put_task_async(task);
4398 dprintk("%s: cancelling lock!\n", __func__);
4400 nfs_free_seqid(data->arg.lock_seqid);
4401 nfs4_put_lock_state(data->lsp);
4402 put_nfs_open_context(data->ctx);
4404 dprintk("%s: done!\n", __func__);
4407 static const struct rpc_call_ops nfs4_lock_ops = {
4408 .rpc_call_prepare = nfs4_lock_prepare,
4409 .rpc_call_done = nfs4_lock_done,
4410 .rpc_release = nfs4_lock_release,
4413 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4414 .rpc_call_prepare = nfs4_recover_lock_prepare,
4415 .rpc_call_done = nfs4_lock_done,
4416 .rpc_release = nfs4_lock_release,
4419 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4422 case -NFS4ERR_ADMIN_REVOKED:
4423 case -NFS4ERR_BAD_STATEID:
4424 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4425 if (new_lock_owner != 0 ||
4426 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4427 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4429 case -NFS4ERR_STALE_STATEID:
4430 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4431 case -NFS4ERR_EXPIRED:
4432 nfs4_schedule_lease_recovery(server->nfs_client);
4436 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4438 struct nfs4_lockdata *data;
4439 struct rpc_task *task;
4440 struct rpc_message msg = {
4441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4442 .rpc_cred = state->owner->so_cred,
4444 struct rpc_task_setup task_setup_data = {
4445 .rpc_client = NFS_CLIENT(state->inode),
4446 .rpc_message = &msg,
4447 .callback_ops = &nfs4_lock_ops,
4448 .workqueue = nfsiod_workqueue,
4449 .flags = RPC_TASK_ASYNC,
4453 dprintk("%s: begin!\n", __func__);
4454 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4455 fl->fl_u.nfs4_fl.owner,
4456 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4460 data->arg.block = 1;
4461 if (recovery_type > NFS_LOCK_NEW) {
4462 if (recovery_type == NFS_LOCK_RECLAIM)
4463 data->arg.reclaim = NFS_LOCK_RECLAIM;
4464 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4466 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4467 msg.rpc_argp = &data->arg;
4468 msg.rpc_resp = &data->res;
4469 task_setup_data.callback_data = data;
4470 task = rpc_run_task(&task_setup_data);
4472 return PTR_ERR(task);
4473 ret = nfs4_wait_for_completion_rpc_task(task);
4475 ret = data->rpc_status;
4477 nfs4_handle_setlk_error(data->server, data->lsp,
4478 data->arg.new_lock_owner, ret);
4480 data->cancelled = 1;
4482 dprintk("%s: done, ret = %d!\n", __func__, ret);
4486 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4488 struct nfs_server *server = NFS_SERVER(state->inode);
4489 struct nfs4_exception exception = { };
4493 /* Cache the lock if possible... */
4494 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4496 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4497 if (err != -NFS4ERR_DELAY)
4499 nfs4_handle_exception(server, err, &exception);
4500 } while (exception.retry);
4504 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4506 struct nfs_server *server = NFS_SERVER(state->inode);
4507 struct nfs4_exception exception = { };
4510 err = nfs4_set_lock_state(state, request);
4514 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4516 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4520 case -NFS4ERR_GRACE:
4521 case -NFS4ERR_DELAY:
4522 nfs4_handle_exception(server, err, &exception);
4525 } while (exception.retry);
4530 #if defined(CONFIG_NFS_V4_1)
4531 static int nfs41_check_expired_locks(struct nfs4_state *state)
4533 int status, ret = NFS_OK;
4534 struct nfs4_lock_state *lsp;
4535 struct nfs_server *server = NFS_SERVER(state->inode);
4537 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4538 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4539 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4540 if (status != NFS_OK) {
4541 nfs41_free_stateid(server, &lsp->ls_stateid);
4542 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4551 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4553 int status = NFS_OK;
4555 if (test_bit(LK_STATE_IN_USE, &state->flags))
4556 status = nfs41_check_expired_locks(state);
4557 if (status == NFS_OK)
4559 return nfs4_lock_expired(state, request);
4563 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4565 struct nfs_inode *nfsi = NFS_I(state->inode);
4566 unsigned char fl_flags = request->fl_flags;
4567 int status = -ENOLCK;
4569 if ((fl_flags & FL_POSIX) &&
4570 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4572 /* Is this a delegated open? */
4573 status = nfs4_set_lock_state(state, request);
4576 request->fl_flags |= FL_ACCESS;
4577 status = do_vfs_lock(request->fl_file, request);
4580 down_read(&nfsi->rwsem);
4581 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4582 /* Yes: cache locks! */
4583 /* ...but avoid races with delegation recall... */
4584 request->fl_flags = fl_flags & ~FL_SLEEP;
4585 status = do_vfs_lock(request->fl_file, request);
4588 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4591 /* Note: we always want to sleep here! */
4592 request->fl_flags = fl_flags | FL_SLEEP;
4593 if (do_vfs_lock(request->fl_file, request) < 0)
4594 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4595 "manager!\n", __func__);
4597 up_read(&nfsi->rwsem);
4599 request->fl_flags = fl_flags;
4603 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4605 struct nfs4_exception exception = { };
4609 err = _nfs4_proc_setlk(state, cmd, request);
4610 if (err == -NFS4ERR_DENIED)
4612 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4614 } while (exception.retry);
4619 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4621 struct nfs_open_context *ctx;
4622 struct nfs4_state *state;
4623 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4626 /* verify open state */
4627 ctx = nfs_file_open_context(filp);
4630 if (request->fl_start < 0 || request->fl_end < 0)
4633 if (IS_GETLK(cmd)) {
4635 return nfs4_proc_getlk(state, F_GETLK, request);
4639 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4642 if (request->fl_type == F_UNLCK) {
4644 return nfs4_proc_unlck(state, cmd, request);
4651 status = nfs4_proc_setlk(state, cmd, request);
4652 if ((status != -EAGAIN) || IS_SETLK(cmd))
4654 timeout = nfs4_set_lock_task_retry(timeout);
4655 status = -ERESTARTSYS;
4658 } while(status < 0);
4662 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4664 struct nfs_server *server = NFS_SERVER(state->inode);
4665 struct nfs4_exception exception = { };
4668 err = nfs4_set_lock_state(state, fl);
4672 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4675 printk(KERN_ERR "NFS: %s: unhandled error "
4676 "%d.\n", __func__, err);
4680 case -NFS4ERR_EXPIRED:
4681 nfs4_schedule_stateid_recovery(server, state);
4682 case -NFS4ERR_STALE_CLIENTID:
4683 case -NFS4ERR_STALE_STATEID:
4684 nfs4_schedule_lease_recovery(server->nfs_client);
4686 case -NFS4ERR_BADSESSION:
4687 case -NFS4ERR_BADSLOT:
4688 case -NFS4ERR_BAD_HIGH_SLOT:
4689 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4690 case -NFS4ERR_DEADSESSION:
4691 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4695 * The show must go on: exit, but mark the
4696 * stateid as needing recovery.
4698 case -NFS4ERR_ADMIN_REVOKED:
4699 case -NFS4ERR_BAD_STATEID:
4700 case -NFS4ERR_OPENMODE:
4701 nfs4_schedule_stateid_recovery(server, state);
4706 * User RPCSEC_GSS context has expired.
4707 * We cannot recover this stateid now, so
4708 * skip it and allow recovery thread to
4714 case -NFS4ERR_DENIED:
4715 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4718 case -NFS4ERR_DELAY:
4721 err = nfs4_handle_exception(server, err, &exception);
4722 } while (exception.retry);
4727 static void nfs4_release_lockowner_release(void *calldata)
4732 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4733 .rpc_release = nfs4_release_lockowner_release,
4736 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4738 struct nfs_server *server = lsp->ls_state->owner->so_server;
4739 struct nfs_release_lockowner_args *args;
4740 struct rpc_message msg = {
4741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4744 if (server->nfs_client->cl_mvops->minor_version != 0)
4746 args = kmalloc(sizeof(*args), GFP_NOFS);
4749 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4750 args->lock_owner.id = lsp->ls_seqid.owner_id;
4751 args->lock_owner.s_dev = server->s_dev;
4752 msg.rpc_argp = args;
4753 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4756 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4758 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4759 const void *buf, size_t buflen,
4760 int flags, int type)
4762 if (strcmp(key, "") != 0)
4765 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4768 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4769 void *buf, size_t buflen, int type)
4771 if (strcmp(key, "") != 0)
4774 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4777 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4778 size_t list_len, const char *name,
4779 size_t name_len, int type)
4781 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4783 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4786 if (list && len <= list_len)
4787 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4792 * nfs_fhget will use either the mounted_on_fileid or the fileid
4794 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4796 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4797 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4798 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4799 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4802 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4803 NFS_ATTR_FATTR_NLINK;
4804 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4808 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4809 struct nfs4_fs_locations *fs_locations, struct page *page)
4811 struct nfs_server *server = NFS_SERVER(dir);
4813 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4815 struct nfs4_fs_locations_arg args = {
4816 .dir_fh = NFS_FH(dir),
4821 struct nfs4_fs_locations_res res = {
4822 .fs_locations = fs_locations,
4824 struct rpc_message msg = {
4825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4831 dprintk("%s: start\n", __func__);
4833 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4834 * is not supported */
4835 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4836 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4838 bitmask[0] |= FATTR4_WORD0_FILEID;
4840 nfs_fattr_init(&fs_locations->fattr);
4841 fs_locations->server = server;
4842 fs_locations->nlocations = 0;
4843 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4844 dprintk("%s: returned status = %d\n", __func__, status);
4848 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4851 struct nfs4_secinfo_arg args = {
4852 .dir_fh = NFS_FH(dir),
4855 struct nfs4_secinfo_res res = {
4858 struct rpc_message msg = {
4859 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4864 dprintk("NFS call secinfo %s\n", name->name);
4865 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4866 dprintk("NFS reply secinfo: %d\n", status);
4870 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4872 struct nfs4_exception exception = { };
4875 err = nfs4_handle_exception(NFS_SERVER(dir),
4876 _nfs4_proc_secinfo(dir, name, flavors),
4878 } while (exception.retry);
4882 #ifdef CONFIG_NFS_V4_1
4884 * Check the exchange flags returned by the server for invalid flags, having
4885 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4888 static int nfs4_check_cl_exchange_flags(u32 flags)
4890 if (flags & ~EXCHGID4_FLAG_MASK_R)
4892 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4893 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4895 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4899 return -NFS4ERR_INVAL;
4903 nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4905 if (a->server_scope_sz == b->server_scope_sz &&
4906 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4913 * nfs4_proc_exchange_id()
4915 * Since the clientid has expired, all compounds using sessions
4916 * associated with the stale clientid will be returning
4917 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4918 * be in some phase of session reset.
4920 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4922 nfs4_verifier verifier;
4923 struct nfs41_exchange_id_args args = {
4925 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4927 struct nfs41_exchange_id_res res = {
4931 struct rpc_message msg = {
4932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4939 dprintk("--> %s\n", __func__);
4940 BUG_ON(clp == NULL);
4942 p = (u32 *)verifier.data;
4943 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4944 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4945 args.verifier = &verifier;
4947 args.id_len = scnprintf(args.id, sizeof(args.id),
4950 init_utsname()->nodename,
4951 init_utsname()->domainname,
4952 clp->cl_rpcclient->cl_auth->au_flavor);
4954 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4955 if (unlikely(!res.server_scope)) {
4960 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_KERNEL);
4961 if (unlikely(!res.impl_id)) {
4963 goto out_server_scope;
4966 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4968 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4971 /* use the most recent implementation id */
4972 kfree(clp->impl_id);
4973 clp->impl_id = res.impl_id;
4978 if (clp->server_scope &&
4979 !nfs41_same_server_scope(clp->server_scope,
4980 res.server_scope)) {
4981 dprintk("%s: server_scope mismatch detected\n",
4983 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4984 kfree(clp->server_scope);
4985 clp->server_scope = NULL;
4988 if (!clp->server_scope) {
4989 clp->server_scope = res.server_scope;
4995 kfree(res.server_scope);
4998 dprintk("%s: Server Implementation ID: "
4999 "domain: %s, name: %s, date: %llu,%u\n",
5000 __func__, clp->impl_id->domain, clp->impl_id->name,
5001 clp->impl_id->date.seconds,
5002 clp->impl_id->date.nseconds);
5003 dprintk("<-- %s status= %d\n", __func__, status);
5007 struct nfs4_get_lease_time_data {
5008 struct nfs4_get_lease_time_args *args;
5009 struct nfs4_get_lease_time_res *res;
5010 struct nfs_client *clp;
5013 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5017 struct nfs4_get_lease_time_data *data =
5018 (struct nfs4_get_lease_time_data *)calldata;
5020 dprintk("--> %s\n", __func__);
5021 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5022 /* just setup sequence, do not trigger session recovery
5023 since we're invoked within one */
5024 ret = nfs41_setup_sequence(data->clp->cl_session,
5025 &data->args->la_seq_args,
5026 &data->res->lr_seq_res, task);
5028 BUG_ON(ret == -EAGAIN);
5029 rpc_call_start(task);
5030 dprintk("<-- %s\n", __func__);
5034 * Called from nfs4_state_manager thread for session setup, so don't recover
5035 * from sequence operation or clientid errors.
5037 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5039 struct nfs4_get_lease_time_data *data =
5040 (struct nfs4_get_lease_time_data *)calldata;
5042 dprintk("--> %s\n", __func__);
5043 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5045 switch (task->tk_status) {
5046 case -NFS4ERR_DELAY:
5047 case -NFS4ERR_GRACE:
5048 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5049 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5050 task->tk_status = 0;
5052 case -NFS4ERR_RETRY_UNCACHED_REP:
5053 rpc_restart_call_prepare(task);
5056 dprintk("<-- %s\n", __func__);
5059 struct rpc_call_ops nfs4_get_lease_time_ops = {
5060 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5061 .rpc_call_done = nfs4_get_lease_time_done,
5064 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5066 struct rpc_task *task;
5067 struct nfs4_get_lease_time_args args;
5068 struct nfs4_get_lease_time_res res = {
5069 .lr_fsinfo = fsinfo,
5071 struct nfs4_get_lease_time_data data = {
5076 struct rpc_message msg = {
5077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5081 struct rpc_task_setup task_setup = {
5082 .rpc_client = clp->cl_rpcclient,
5083 .rpc_message = &msg,
5084 .callback_ops = &nfs4_get_lease_time_ops,
5085 .callback_data = &data,
5086 .flags = RPC_TASK_TIMEOUT,
5090 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5091 dprintk("--> %s\n", __func__);
5092 task = rpc_run_task(&task_setup);
5095 status = PTR_ERR(task);
5097 status = task->tk_status;
5100 dprintk("<-- %s return %d\n", __func__, status);
5106 * Reset a slot table
5108 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5111 struct nfs4_slot *new = NULL;
5115 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5116 max_reqs, tbl->max_slots);
5118 /* Does the newly negotiated max_reqs match the existing slot table? */
5119 if (max_reqs != tbl->max_slots) {
5121 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
5128 spin_lock(&tbl->slot_tbl_lock);
5131 tbl->max_slots = max_reqs;
5133 for (i = 0; i < tbl->max_slots; ++i)
5134 tbl->slots[i].seq_nr = ivalue;
5135 spin_unlock(&tbl->slot_tbl_lock);
5136 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5137 tbl, tbl->slots, tbl->max_slots);
5139 dprintk("<-- %s: return %d\n", __func__, ret);
5143 /* Destroy the slot table */
5144 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5146 if (session->fc_slot_table.slots != NULL) {
5147 kfree(session->fc_slot_table.slots);
5148 session->fc_slot_table.slots = NULL;
5150 if (session->bc_slot_table.slots != NULL) {
5151 kfree(session->bc_slot_table.slots);
5152 session->bc_slot_table.slots = NULL;
5158 * Initialize slot table
5160 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5161 int max_slots, int ivalue)
5163 struct nfs4_slot *slot;
5166 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5168 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
5170 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
5175 spin_lock(&tbl->slot_tbl_lock);
5176 tbl->max_slots = max_slots;
5178 tbl->highest_used_slotid = NFS4_NO_SLOT; /* no slot is currently used */
5179 spin_unlock(&tbl->slot_tbl_lock);
5180 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5181 tbl, tbl->slots, tbl->max_slots);
5183 dprintk("<-- %s: return %d\n", __func__, ret);
5188 * Initialize or reset the forechannel and backchannel tables
5190 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5192 struct nfs4_slot_table *tbl;
5195 dprintk("--> %s\n", __func__);
5197 tbl = &ses->fc_slot_table;
5198 if (tbl->slots == NULL) {
5199 status = nfs4_init_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5200 if (status) /* -ENOMEM */
5203 status = nfs4_reset_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5208 tbl = &ses->bc_slot_table;
5209 if (tbl->slots == NULL) {
5210 status = nfs4_init_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5212 /* Fore and back channel share a connection so get
5213 * both slot tables or neither */
5214 nfs4_destroy_slot_tables(ses);
5216 status = nfs4_reset_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5220 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5222 struct nfs4_session *session;
5223 struct nfs4_slot_table *tbl;
5225 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5229 tbl = &session->fc_slot_table;
5230 tbl->highest_used_slotid = NFS4_NO_SLOT;
5231 spin_lock_init(&tbl->slot_tbl_lock);
5232 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5233 init_completion(&tbl->complete);
5235 tbl = &session->bc_slot_table;
5236 tbl->highest_used_slotid = NFS4_NO_SLOT;
5237 spin_lock_init(&tbl->slot_tbl_lock);
5238 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5239 init_completion(&tbl->complete);
5241 session->session_state = 1<<NFS4_SESSION_INITING;
5247 void nfs4_destroy_session(struct nfs4_session *session)
5249 struct rpc_xprt *xprt;
5251 nfs4_proc_destroy_session(session);
5254 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5256 dprintk("%s Destroy backchannel for xprt %p\n",
5258 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5259 nfs4_destroy_slot_tables(session);
5264 * Initialize the values to be used by the client in CREATE_SESSION
5265 * If nfs4_init_session set the fore channel request and response sizes,
5268 * Set the back channel max_resp_sz_cached to zero to force the client to
5269 * always set csa_cachethis to FALSE because the current implementation
5270 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5272 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5274 struct nfs4_session *session = args->client->cl_session;
5275 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5276 mxresp_sz = session->fc_attrs.max_resp_sz;
5279 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5281 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5282 /* Fore channel attributes */
5283 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5284 args->fc_attrs.max_resp_sz = mxresp_sz;
5285 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5286 args->fc_attrs.max_reqs = max_session_slots;
5288 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5289 "max_ops=%u max_reqs=%u\n",
5291 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5292 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5294 /* Back channel attributes */
5295 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5296 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5297 args->bc_attrs.max_resp_sz_cached = 0;
5298 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5299 args->bc_attrs.max_reqs = 1;
5301 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5302 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5304 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5305 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5306 args->bc_attrs.max_reqs);
5309 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5311 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5312 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5314 if (rcvd->max_resp_sz > sent->max_resp_sz)
5317 * Our requested max_ops is the minimum we need; we're not
5318 * prepared to break up compounds into smaller pieces than that.
5319 * So, no point even trying to continue if the server won't
5322 if (rcvd->max_ops < sent->max_ops)
5324 if (rcvd->max_reqs == 0)
5326 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5327 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5331 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5333 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5334 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5336 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5338 if (rcvd->max_resp_sz < sent->max_resp_sz)
5340 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5342 /* These would render the backchannel useless: */
5343 if (rcvd->max_ops != sent->max_ops)
5345 if (rcvd->max_reqs != sent->max_reqs)
5350 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5351 struct nfs4_session *session)
5355 ret = nfs4_verify_fore_channel_attrs(args, session);
5358 return nfs4_verify_back_channel_attrs(args, session);
5361 static int _nfs4_proc_create_session(struct nfs_client *clp)
5363 struct nfs4_session *session = clp->cl_session;
5364 struct nfs41_create_session_args args = {
5366 .cb_program = NFS4_CALLBACK,
5368 struct nfs41_create_session_res res = {
5371 struct rpc_message msg = {
5372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5378 nfs4_init_channel_attrs(&args);
5379 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5381 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5384 /* Verify the session's negotiated channel_attrs values */
5385 status = nfs4_verify_channel_attrs(&args, session);
5387 /* Increment the clientid slot sequence id */
5395 * Issues a CREATE_SESSION operation to the server.
5396 * It is the responsibility of the caller to verify the session is
5397 * expired before calling this routine.
5399 int nfs4_proc_create_session(struct nfs_client *clp)
5403 struct nfs4_session *session = clp->cl_session;
5405 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5407 status = _nfs4_proc_create_session(clp);
5411 /* Init or reset the session slot tables */
5412 status = nfs4_setup_session_slot_tables(session);
5413 dprintk("slot table setup returned %d\n", status);
5417 ptr = (unsigned *)&session->sess_id.data[0];
5418 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5419 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5421 dprintk("<-- %s\n", __func__);
5426 * Issue the over-the-wire RPC DESTROY_SESSION.
5427 * The caller must serialize access to this routine.
5429 int nfs4_proc_destroy_session(struct nfs4_session *session)
5432 struct rpc_message msg;
5434 dprintk("--> nfs4_proc_destroy_session\n");
5436 /* session is still being setup */
5437 if (session->clp->cl_cons_state != NFS_CS_READY)
5440 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5441 msg.rpc_argp = session;
5442 msg.rpc_resp = NULL;
5443 msg.rpc_cred = NULL;
5444 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5448 "NFS: Got error %d from the server on DESTROY_SESSION. "
5449 "Session has been destroyed regardless...\n", status);
5451 dprintk("<-- nfs4_proc_destroy_session\n");
5455 int nfs4_init_session(struct nfs_server *server)
5457 struct nfs_client *clp = server->nfs_client;
5458 struct nfs4_session *session;
5459 unsigned int rsize, wsize;
5462 if (!nfs4_has_session(clp))
5465 session = clp->cl_session;
5466 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5469 rsize = server->rsize;
5471 rsize = NFS_MAX_FILE_IO_SIZE;
5472 wsize = server->wsize;
5474 wsize = NFS_MAX_FILE_IO_SIZE;
5476 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5477 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5479 ret = nfs4_recover_expired_lease(server);
5481 ret = nfs4_check_client_ready(clp);
5485 int nfs4_init_ds_session(struct nfs_client *clp)
5487 struct nfs4_session *session = clp->cl_session;
5490 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5493 ret = nfs4_client_recover_expired_lease(clp);
5495 /* Test for the DS role */
5496 if (!is_ds_client(clp))
5499 ret = nfs4_check_client_ready(clp);
5503 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5507 * Renew the cl_session lease.
5509 struct nfs4_sequence_data {
5510 struct nfs_client *clp;
5511 struct nfs4_sequence_args args;
5512 struct nfs4_sequence_res res;
5515 static void nfs41_sequence_release(void *data)
5517 struct nfs4_sequence_data *calldata = data;
5518 struct nfs_client *clp = calldata->clp;
5520 if (atomic_read(&clp->cl_count) > 1)
5521 nfs4_schedule_state_renewal(clp);
5522 nfs_put_client(clp);
5526 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5528 switch(task->tk_status) {
5529 case -NFS4ERR_DELAY:
5530 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5533 nfs4_schedule_lease_recovery(clp);
5538 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5540 struct nfs4_sequence_data *calldata = data;
5541 struct nfs_client *clp = calldata->clp;
5543 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5546 if (task->tk_status < 0) {
5547 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5548 if (atomic_read(&clp->cl_count) == 1)
5551 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5552 rpc_restart_call_prepare(task);
5556 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5558 dprintk("<-- %s\n", __func__);
5561 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5563 struct nfs4_sequence_data *calldata = data;
5564 struct nfs_client *clp = calldata->clp;
5565 struct nfs4_sequence_args *args;
5566 struct nfs4_sequence_res *res;
5568 args = task->tk_msg.rpc_argp;
5569 res = task->tk_msg.rpc_resp;
5571 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5573 rpc_call_start(task);
5576 static const struct rpc_call_ops nfs41_sequence_ops = {
5577 .rpc_call_done = nfs41_sequence_call_done,
5578 .rpc_call_prepare = nfs41_sequence_prepare,
5579 .rpc_release = nfs41_sequence_release,
5582 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5584 struct nfs4_sequence_data *calldata;
5585 struct rpc_message msg = {
5586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5589 struct rpc_task_setup task_setup_data = {
5590 .rpc_client = clp->cl_rpcclient,
5591 .rpc_message = &msg,
5592 .callback_ops = &nfs41_sequence_ops,
5593 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5596 if (!atomic_inc_not_zero(&clp->cl_count))
5597 return ERR_PTR(-EIO);
5598 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5599 if (calldata == NULL) {
5600 nfs_put_client(clp);
5601 return ERR_PTR(-ENOMEM);
5603 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5604 msg.rpc_argp = &calldata->args;
5605 msg.rpc_resp = &calldata->res;
5606 calldata->clp = clp;
5607 task_setup_data.callback_data = calldata;
5609 return rpc_run_task(&task_setup_data);
5612 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5614 struct rpc_task *task;
5617 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5619 task = _nfs41_proc_sequence(clp, cred);
5621 ret = PTR_ERR(task);
5623 rpc_put_task_async(task);
5624 dprintk("<-- %s status=%d\n", __func__, ret);
5628 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5630 struct rpc_task *task;
5633 task = _nfs41_proc_sequence(clp, cred);
5635 ret = PTR_ERR(task);
5638 ret = rpc_wait_for_completion_task(task);
5640 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5642 if (task->tk_status == 0)
5643 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5644 ret = task->tk_status;
5648 dprintk("<-- %s status=%d\n", __func__, ret);
5652 struct nfs4_reclaim_complete_data {
5653 struct nfs_client *clp;
5654 struct nfs41_reclaim_complete_args arg;
5655 struct nfs41_reclaim_complete_res res;
5658 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5660 struct nfs4_reclaim_complete_data *calldata = data;
5662 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5663 if (nfs41_setup_sequence(calldata->clp->cl_session,
5664 &calldata->arg.seq_args,
5665 &calldata->res.seq_res, task))
5668 rpc_call_start(task);
5671 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5673 switch(task->tk_status) {
5675 case -NFS4ERR_COMPLETE_ALREADY:
5676 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5678 case -NFS4ERR_DELAY:
5679 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5681 case -NFS4ERR_RETRY_UNCACHED_REP:
5684 nfs4_schedule_lease_recovery(clp);
5689 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5691 struct nfs4_reclaim_complete_data *calldata = data;
5692 struct nfs_client *clp = calldata->clp;
5693 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5695 dprintk("--> %s\n", __func__);
5696 if (!nfs41_sequence_done(task, res))
5699 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5700 rpc_restart_call_prepare(task);
5703 dprintk("<-- %s\n", __func__);
5706 static void nfs4_free_reclaim_complete_data(void *data)
5708 struct nfs4_reclaim_complete_data *calldata = data;
5713 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5714 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5715 .rpc_call_done = nfs4_reclaim_complete_done,
5716 .rpc_release = nfs4_free_reclaim_complete_data,
5720 * Issue a global reclaim complete.
5722 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5724 struct nfs4_reclaim_complete_data *calldata;
5725 struct rpc_task *task;
5726 struct rpc_message msg = {
5727 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5729 struct rpc_task_setup task_setup_data = {
5730 .rpc_client = clp->cl_rpcclient,
5731 .rpc_message = &msg,
5732 .callback_ops = &nfs4_reclaim_complete_call_ops,
5733 .flags = RPC_TASK_ASYNC,
5735 int status = -ENOMEM;
5737 dprintk("--> %s\n", __func__);
5738 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5739 if (calldata == NULL)
5741 calldata->clp = clp;
5742 calldata->arg.one_fs = 0;
5744 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
5745 msg.rpc_argp = &calldata->arg;
5746 msg.rpc_resp = &calldata->res;
5747 task_setup_data.callback_data = calldata;
5748 task = rpc_run_task(&task_setup_data);
5750 status = PTR_ERR(task);
5753 status = nfs4_wait_for_completion_rpc_task(task);
5755 status = task->tk_status;
5759 dprintk("<-- %s status=%d\n", __func__, status);
5764 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5766 struct nfs4_layoutget *lgp = calldata;
5767 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5769 dprintk("--> %s\n", __func__);
5770 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5771 * right now covering the LAYOUTGET we are about to send.
5772 * However, that is not so catastrophic, and there seems
5773 * to be no way to prevent it completely.
5775 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5776 &lgp->res.seq_res, task))
5778 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5779 NFS_I(lgp->args.inode)->layout,
5780 lgp->args.ctx->state)) {
5781 rpc_exit(task, NFS4_OK);
5784 rpc_call_start(task);
5787 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5789 struct nfs4_layoutget *lgp = calldata;
5790 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5792 dprintk("--> %s\n", __func__);
5794 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5797 switch (task->tk_status) {
5800 case -NFS4ERR_LAYOUTTRYLATER:
5801 case -NFS4ERR_RECALLCONFLICT:
5802 task->tk_status = -NFS4ERR_DELAY;
5805 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5806 rpc_restart_call_prepare(task);
5810 dprintk("<-- %s\n", __func__);
5813 static void nfs4_layoutget_release(void *calldata)
5815 struct nfs4_layoutget *lgp = calldata;
5817 dprintk("--> %s\n", __func__);
5818 put_nfs_open_context(lgp->args.ctx);
5820 dprintk("<-- %s\n", __func__);
5823 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5824 .rpc_call_prepare = nfs4_layoutget_prepare,
5825 .rpc_call_done = nfs4_layoutget_done,
5826 .rpc_release = nfs4_layoutget_release,
5829 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5831 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5832 struct rpc_task *task;
5833 struct rpc_message msg = {
5834 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5835 .rpc_argp = &lgp->args,
5836 .rpc_resp = &lgp->res,
5838 struct rpc_task_setup task_setup_data = {
5839 .rpc_client = server->client,
5840 .rpc_message = &msg,
5841 .callback_ops = &nfs4_layoutget_call_ops,
5842 .callback_data = lgp,
5843 .flags = RPC_TASK_ASYNC,
5847 dprintk("--> %s\n", __func__);
5849 lgp->res.layoutp = &lgp->args.layout;
5850 lgp->res.seq_res.sr_slot = NULL;
5851 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
5852 task = rpc_run_task(&task_setup_data);
5854 return PTR_ERR(task);
5855 status = nfs4_wait_for_completion_rpc_task(task);
5857 status = task->tk_status;
5859 status = pnfs_layout_process(lgp);
5861 dprintk("<-- %s status=%d\n", __func__, status);
5866 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5868 struct nfs4_layoutreturn *lrp = calldata;
5870 dprintk("--> %s\n", __func__);
5871 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5872 &lrp->res.seq_res, task))
5874 rpc_call_start(task);
5877 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5879 struct nfs4_layoutreturn *lrp = calldata;
5880 struct nfs_server *server;
5881 struct pnfs_layout_hdr *lo = lrp->args.layout;
5883 dprintk("--> %s\n", __func__);
5885 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5888 server = NFS_SERVER(lrp->args.inode);
5889 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5890 rpc_restart_call_prepare(task);
5893 spin_lock(&lo->plh_inode->i_lock);
5894 if (task->tk_status == 0) {
5895 if (lrp->res.lrs_present) {
5896 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5898 BUG_ON(!list_empty(&lo->plh_segs));
5900 lo->plh_block_lgets--;
5901 spin_unlock(&lo->plh_inode->i_lock);
5902 dprintk("<-- %s\n", __func__);
5905 static void nfs4_layoutreturn_release(void *calldata)
5907 struct nfs4_layoutreturn *lrp = calldata;
5909 dprintk("--> %s\n", __func__);
5910 put_layout_hdr(lrp->args.layout);
5912 dprintk("<-- %s\n", __func__);
5915 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5916 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5917 .rpc_call_done = nfs4_layoutreturn_done,
5918 .rpc_release = nfs4_layoutreturn_release,
5921 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5923 struct rpc_task *task;
5924 struct rpc_message msg = {
5925 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5926 .rpc_argp = &lrp->args,
5927 .rpc_resp = &lrp->res,
5929 struct rpc_task_setup task_setup_data = {
5930 .rpc_client = lrp->clp->cl_rpcclient,
5931 .rpc_message = &msg,
5932 .callback_ops = &nfs4_layoutreturn_call_ops,
5933 .callback_data = lrp,
5937 dprintk("--> %s\n", __func__);
5938 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
5939 task = rpc_run_task(&task_setup_data);
5941 return PTR_ERR(task);
5942 status = task->tk_status;
5943 dprintk("<-- %s status=%d\n", __func__, status);
5949 * Retrieve the list of Data Server devices from the MDS.
5951 static int _nfs4_getdevicelist(struct nfs_server *server,
5952 const struct nfs_fh *fh,
5953 struct pnfs_devicelist *devlist)
5955 struct nfs4_getdevicelist_args args = {
5957 .layoutclass = server->pnfs_curr_ld->id,
5959 struct nfs4_getdevicelist_res res = {
5962 struct rpc_message msg = {
5963 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5969 dprintk("--> %s\n", __func__);
5970 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5972 dprintk("<-- %s status=%d\n", __func__, status);
5976 int nfs4_proc_getdevicelist(struct nfs_server *server,
5977 const struct nfs_fh *fh,
5978 struct pnfs_devicelist *devlist)
5980 struct nfs4_exception exception = { };
5984 err = nfs4_handle_exception(server,
5985 _nfs4_getdevicelist(server, fh, devlist),
5987 } while (exception.retry);
5989 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5990 err, devlist->num_devs);
5994 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5997 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5999 struct nfs4_getdeviceinfo_args args = {
6002 struct nfs4_getdeviceinfo_res res = {
6005 struct rpc_message msg = {
6006 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6012 dprintk("--> %s\n", __func__);
6013 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6014 dprintk("<-- %s status=%d\n", __func__, status);
6019 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6021 struct nfs4_exception exception = { };
6025 err = nfs4_handle_exception(server,
6026 _nfs4_proc_getdeviceinfo(server, pdev),
6028 } while (exception.retry);
6031 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6033 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6035 struct nfs4_layoutcommit_data *data = calldata;
6036 struct nfs_server *server = NFS_SERVER(data->args.inode);
6038 if (nfs4_setup_sequence(server, &data->args.seq_args,
6039 &data->res.seq_res, task))
6041 rpc_call_start(task);
6045 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6047 struct nfs4_layoutcommit_data *data = calldata;
6048 struct nfs_server *server = NFS_SERVER(data->args.inode);
6050 if (!nfs4_sequence_done(task, &data->res.seq_res))
6053 switch (task->tk_status) { /* Just ignore these failures */
6054 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6055 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6056 case NFS4ERR_BADLAYOUT: /* no layout */
6057 case NFS4ERR_GRACE: /* loca_recalim always false */
6058 task->tk_status = 0;
6061 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6062 rpc_restart_call_prepare(task);
6066 if (task->tk_status == 0)
6067 nfs_post_op_update_inode_force_wcc(data->args.inode,
6071 static void nfs4_layoutcommit_release(void *calldata)
6073 struct nfs4_layoutcommit_data *data = calldata;
6074 struct pnfs_layout_segment *lseg, *tmp;
6075 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6077 pnfs_cleanup_layoutcommit(data);
6078 /* Matched by references in pnfs_set_layoutcommit */
6079 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6080 list_del_init(&lseg->pls_lc_list);
6081 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6086 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6087 smp_mb__after_clear_bit();
6088 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6090 put_rpccred(data->cred);
6094 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6095 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6096 .rpc_call_done = nfs4_layoutcommit_done,
6097 .rpc_release = nfs4_layoutcommit_release,
6101 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6103 struct rpc_message msg = {
6104 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6105 .rpc_argp = &data->args,
6106 .rpc_resp = &data->res,
6107 .rpc_cred = data->cred,
6109 struct rpc_task_setup task_setup_data = {
6110 .task = &data->task,
6111 .rpc_client = NFS_CLIENT(data->args.inode),
6112 .rpc_message = &msg,
6113 .callback_ops = &nfs4_layoutcommit_ops,
6114 .callback_data = data,
6115 .flags = RPC_TASK_ASYNC,
6117 struct rpc_task *task;
6120 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6121 "lbw: %llu inode %lu\n",
6122 data->task.tk_pid, sync,
6123 data->args.lastbytewritten,
6124 data->args.inode->i_ino);
6126 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6127 task = rpc_run_task(&task_setup_data);
6129 return PTR_ERR(task);
6132 status = nfs4_wait_for_completion_rpc_task(task);
6135 status = task->tk_status;
6137 dprintk("%s: status %d\n", __func__, status);
6143 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6144 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6146 struct nfs41_secinfo_no_name_args args = {
6147 .style = SECINFO_STYLE_CURRENT_FH,
6149 struct nfs4_secinfo_res res = {
6152 struct rpc_message msg = {
6153 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6157 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6161 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6162 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6164 struct nfs4_exception exception = { };
6167 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6170 case -NFS4ERR_WRONGSEC:
6171 case -NFS4ERR_NOTSUPP:
6174 err = nfs4_handle_exception(server, err, &exception);
6176 } while (exception.retry);
6181 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6182 struct nfs_fsinfo *info)
6186 rpc_authflavor_t flavor;
6187 struct nfs4_secinfo_flavors *flavors;
6189 page = alloc_page(GFP_KERNEL);
6195 flavors = page_address(page);
6196 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6199 * Fall back on "guess and check" method if
6200 * the server doesn't support SECINFO_NO_NAME
6202 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6203 err = nfs4_find_root_sec(server, fhandle, info);
6209 flavor = nfs_find_best_sec(flavors);
6211 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6221 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6224 struct nfs41_test_stateid_args args = {
6227 struct nfs41_test_stateid_res res;
6228 struct rpc_message msg = {
6229 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6234 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6235 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6237 if (status == NFS_OK)
6242 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6244 struct nfs4_exception exception = { };
6247 err = nfs4_handle_exception(server,
6248 _nfs41_test_stateid(server, stateid),
6250 } while (exception.retry);
6254 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6256 struct nfs41_free_stateid_args args = {
6259 struct nfs41_free_stateid_res res;
6260 struct rpc_message msg = {
6261 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6266 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6267 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6270 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6272 struct nfs4_exception exception = { };
6275 err = nfs4_handle_exception(server,
6276 _nfs4_free_stateid(server, stateid),
6278 } while (exception.retry);
6281 #endif /* CONFIG_NFS_V4_1 */
6283 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6284 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6285 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6286 .recover_open = nfs4_open_reclaim,
6287 .recover_lock = nfs4_lock_reclaim,
6288 .establish_clid = nfs4_init_clientid,
6289 .get_clid_cred = nfs4_get_setclientid_cred,
6292 #if defined(CONFIG_NFS_V4_1)
6293 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6294 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6295 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6296 .recover_open = nfs4_open_reclaim,
6297 .recover_lock = nfs4_lock_reclaim,
6298 .establish_clid = nfs41_init_clientid,
6299 .get_clid_cred = nfs4_get_exchange_id_cred,
6300 .reclaim_complete = nfs41_proc_reclaim_complete,
6302 #endif /* CONFIG_NFS_V4_1 */
6304 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6305 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6306 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6307 .recover_open = nfs4_open_expired,
6308 .recover_lock = nfs4_lock_expired,
6309 .establish_clid = nfs4_init_clientid,
6310 .get_clid_cred = nfs4_get_setclientid_cred,
6313 #if defined(CONFIG_NFS_V4_1)
6314 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6315 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6316 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6317 .recover_open = nfs41_open_expired,
6318 .recover_lock = nfs41_lock_expired,
6319 .establish_clid = nfs41_init_clientid,
6320 .get_clid_cred = nfs4_get_exchange_id_cred,
6322 #endif /* CONFIG_NFS_V4_1 */
6324 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6325 .sched_state_renewal = nfs4_proc_async_renew,
6326 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6327 .renew_lease = nfs4_proc_renew,
6330 #if defined(CONFIG_NFS_V4_1)
6331 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6332 .sched_state_renewal = nfs41_proc_async_sequence,
6333 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6334 .renew_lease = nfs4_proc_sequence,
6338 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6340 .call_sync = _nfs4_call_sync,
6341 .validate_stateid = nfs4_validate_delegation_stateid,
6342 .find_root_sec = nfs4_find_root_sec,
6343 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6344 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6345 .state_renewal_ops = &nfs40_state_renewal_ops,
6348 #if defined(CONFIG_NFS_V4_1)
6349 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6351 .call_sync = _nfs4_call_sync_session,
6352 .validate_stateid = nfs41_validate_delegation_stateid,
6353 .find_root_sec = nfs41_find_root_sec,
6354 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6355 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6356 .state_renewal_ops = &nfs41_state_renewal_ops,
6360 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6361 [0] = &nfs_v4_0_minor_ops,
6362 #if defined(CONFIG_NFS_V4_1)
6363 [1] = &nfs_v4_1_minor_ops,
6367 static const struct inode_operations nfs4_file_inode_operations = {
6368 .permission = nfs_permission,
6369 .getattr = nfs_getattr,
6370 .setattr = nfs_setattr,
6371 .getxattr = generic_getxattr,
6372 .setxattr = generic_setxattr,
6373 .listxattr = generic_listxattr,
6374 .removexattr = generic_removexattr,
6377 const struct nfs_rpc_ops nfs_v4_clientops = {
6378 .version = 4, /* protocol version */
6379 .dentry_ops = &nfs4_dentry_operations,
6380 .dir_inode_ops = &nfs4_dir_inode_operations,
6381 .file_inode_ops = &nfs4_file_inode_operations,
6382 .file_ops = &nfs4_file_operations,
6383 .getroot = nfs4_proc_get_root,
6384 .getattr = nfs4_proc_getattr,
6385 .setattr = nfs4_proc_setattr,
6386 .lookup = nfs4_proc_lookup,
6387 .access = nfs4_proc_access,
6388 .readlink = nfs4_proc_readlink,
6389 .create = nfs4_proc_create,
6390 .remove = nfs4_proc_remove,
6391 .unlink_setup = nfs4_proc_unlink_setup,
6392 .unlink_done = nfs4_proc_unlink_done,
6393 .rename = nfs4_proc_rename,
6394 .rename_setup = nfs4_proc_rename_setup,
6395 .rename_done = nfs4_proc_rename_done,
6396 .link = nfs4_proc_link,
6397 .symlink = nfs4_proc_symlink,
6398 .mkdir = nfs4_proc_mkdir,
6399 .rmdir = nfs4_proc_remove,
6400 .readdir = nfs4_proc_readdir,
6401 .mknod = nfs4_proc_mknod,
6402 .statfs = nfs4_proc_statfs,
6403 .fsinfo = nfs4_proc_fsinfo,
6404 .pathconf = nfs4_proc_pathconf,
6405 .set_capabilities = nfs4_server_capabilities,
6406 .decode_dirent = nfs4_decode_dirent,
6407 .read_setup = nfs4_proc_read_setup,
6408 .read_done = nfs4_read_done,
6409 .write_setup = nfs4_proc_write_setup,
6410 .write_done = nfs4_write_done,
6411 .commit_setup = nfs4_proc_commit_setup,
6412 .commit_done = nfs4_commit_done,
6413 .lock = nfs4_proc_lock,
6414 .clear_acl_cache = nfs4_zap_acl_attr,
6415 .close_context = nfs4_close_context,
6416 .open_context = nfs4_atomic_open,
6417 .init_client = nfs4_init_client,
6418 .secinfo = nfs4_proc_secinfo,
6421 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6422 .prefix = XATTR_NAME_NFSV4_ACL,
6423 .list = nfs4_xattr_list_nfs4_acl,
6424 .get = nfs4_xattr_get_nfs4_acl,
6425 .set = nfs4_xattr_set_nfs4_acl,
6428 const struct xattr_handler *nfs4_xattr_handlers[] = {
6429 &nfs4_xattr_nfs4_acl_handler,
6433 module_param(max_session_slots, ushort, 0644);
6434 MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6435 "requests the client will negotiate");