4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/sunrpc/gss_api.h>
47 #include <linux/nfs.h>
48 #include <linux/nfs4.h>
49 #include <linux/nfs_fs.h>
50 #include <linux/nfs_page.h>
51 #include <linux/nfs_mount.h>
52 #include <linux/namei.h>
53 #include <linux/mount.h>
54 #include <linux/module.h>
55 #include <linux/nfs_idmap.h>
56 #include <linux/sunrpc/bc_xprt.h>
57 #include <linux/xattr.h>
58 #include <linux/utsname.h>
59 #include <linux/freezer.h>
62 #include "delegation.h"
68 #define NFSDBG_FACILITY NFSDBG_PROC
70 #define NFS4_POLL_RETRY_MIN (HZ/10)
71 #define NFS4_POLL_RETRY_MAX (15*HZ)
73 #define NFS4_MAX_LOOP_ON_RECOVER (10)
76 static int _nfs4_proc_open(struct nfs4_opendata *data);
77 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
78 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
79 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
80 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
81 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
82 struct nfs_fattr *fattr, struct iattr *sattr,
83 struct nfs4_state *state);
84 #ifdef CONFIG_NFS_V4_1
85 static int nfs41_test_stateid(struct nfs_server *, struct nfs4_state *);
86 static int nfs41_free_stateid(struct nfs_server *, struct nfs4_state *);
88 /* Prevent leaks of NFSv4 errors into userland */
89 static int nfs4_map_errors(int err)
94 case -NFS4ERR_RESOURCE:
96 case -NFS4ERR_WRONGSEC:
98 case -NFS4ERR_BADOWNER:
99 case -NFS4ERR_BADNAME:
102 dprintk("%s could not handle NFSv4 error %d\n",
110 * This is our standard bitmap for GETATTR requests.
112 const u32 nfs4_fattr_bitmap[2] = {
114 | FATTR4_WORD0_CHANGE
117 | FATTR4_WORD0_FILEID,
119 | FATTR4_WORD1_NUMLINKS
121 | FATTR4_WORD1_OWNER_GROUP
122 | FATTR4_WORD1_RAWDEV
123 | FATTR4_WORD1_SPACE_USED
124 | FATTR4_WORD1_TIME_ACCESS
125 | FATTR4_WORD1_TIME_METADATA
126 | FATTR4_WORD1_TIME_MODIFY
129 const u32 nfs4_statfs_bitmap[2] = {
130 FATTR4_WORD0_FILES_AVAIL
131 | FATTR4_WORD0_FILES_FREE
132 | FATTR4_WORD0_FILES_TOTAL,
133 FATTR4_WORD1_SPACE_AVAIL
134 | FATTR4_WORD1_SPACE_FREE
135 | FATTR4_WORD1_SPACE_TOTAL
138 const u32 nfs4_pathconf_bitmap[2] = {
140 | FATTR4_WORD0_MAXNAME,
144 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
145 | FATTR4_WORD0_MAXREAD
146 | FATTR4_WORD0_MAXWRITE
147 | FATTR4_WORD0_LEASE_TIME,
148 FATTR4_WORD1_TIME_DELTA
149 | FATTR4_WORD1_FS_LAYOUT_TYPES,
150 FATTR4_WORD2_LAYOUT_BLKSIZE
153 const u32 nfs4_fs_locations_bitmap[2] = {
155 | FATTR4_WORD0_CHANGE
158 | FATTR4_WORD0_FILEID
159 | FATTR4_WORD0_FS_LOCATIONS,
161 | FATTR4_WORD1_NUMLINKS
163 | FATTR4_WORD1_OWNER_GROUP
164 | FATTR4_WORD1_RAWDEV
165 | FATTR4_WORD1_SPACE_USED
166 | FATTR4_WORD1_TIME_ACCESS
167 | FATTR4_WORD1_TIME_METADATA
168 | FATTR4_WORD1_TIME_MODIFY
169 | FATTR4_WORD1_MOUNTED_ON_FILEID
172 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
173 struct nfs4_readdir_arg *readdir)
177 BUG_ON(readdir->count < 80);
179 readdir->cookie = cookie;
180 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
185 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
190 * NFSv4 servers do not return entries for '.' and '..'
191 * Therefore, we fake these entries here. We let '.'
192 * have cookie 0 and '..' have cookie 1. Note that
193 * when talking to the server, we always send cookie 0
196 start = p = kmap_atomic(*readdir->pages, KM_USER0);
199 *p++ = xdr_one; /* next */
200 *p++ = xdr_zero; /* cookie, first word */
201 *p++ = xdr_one; /* cookie, second word */
202 *p++ = xdr_one; /* entry len */
203 memcpy(p, ".\0\0\0", 4); /* entry */
205 *p++ = xdr_one; /* bitmap length */
206 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
207 *p++ = htonl(8); /* attribute buffer length */
208 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
211 *p++ = xdr_one; /* next */
212 *p++ = xdr_zero; /* cookie, first word */
213 *p++ = xdr_two; /* cookie, second word */
214 *p++ = xdr_two; /* entry len */
215 memcpy(p, "..\0\0", 4); /* entry */
217 *p++ = xdr_one; /* bitmap length */
218 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
219 *p++ = htonl(8); /* attribute buffer length */
220 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
222 readdir->pgbase = (char *)p - (char *)start;
223 readdir->count -= readdir->pgbase;
224 kunmap_atomic(start, KM_USER0);
227 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
233 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
234 nfs_wait_bit_killable, TASK_KILLABLE);
238 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
245 *timeout = NFS4_POLL_RETRY_MIN;
246 if (*timeout > NFS4_POLL_RETRY_MAX)
247 *timeout = NFS4_POLL_RETRY_MAX;
248 freezable_schedule_timeout_killable(*timeout);
249 if (fatal_signal_pending(current))
255 /* This is the error handling routine for processes that are allowed
258 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
260 struct nfs_client *clp = server->nfs_client;
261 struct nfs4_state *state = exception->state;
264 exception->retry = 0;
268 case -NFS4ERR_ADMIN_REVOKED:
269 case -NFS4ERR_BAD_STATEID:
270 case -NFS4ERR_OPENMODE:
273 nfs4_schedule_stateid_recovery(server, state);
274 goto wait_on_recovery;
275 case -NFS4ERR_EXPIRED:
277 nfs4_schedule_stateid_recovery(server, state);
278 case -NFS4ERR_STALE_STATEID:
279 case -NFS4ERR_STALE_CLIENTID:
280 nfs4_schedule_lease_recovery(clp);
281 goto wait_on_recovery;
282 #if defined(CONFIG_NFS_V4_1)
283 case -NFS4ERR_BADSESSION:
284 case -NFS4ERR_BADSLOT:
285 case -NFS4ERR_BAD_HIGH_SLOT:
286 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
287 case -NFS4ERR_DEADSESSION:
288 case -NFS4ERR_SEQ_FALSE_RETRY:
289 case -NFS4ERR_SEQ_MISORDERED:
290 dprintk("%s ERROR: %d Reset session\n", __func__,
292 nfs4_schedule_session_recovery(clp->cl_session);
293 exception->retry = 1;
295 #endif /* defined(CONFIG_NFS_V4_1) */
296 case -NFS4ERR_FILE_OPEN:
297 if (exception->timeout > HZ) {
298 /* We have retried a decent amount, time to
307 ret = nfs4_delay(server->client, &exception->timeout);
310 case -NFS4ERR_RETRY_UNCACHED_REP:
311 case -NFS4ERR_OLD_STATEID:
312 exception->retry = 1;
314 case -NFS4ERR_BADOWNER:
315 /* The following works around a Linux server bug! */
316 case -NFS4ERR_BADNAME:
317 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
318 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
319 exception->retry = 1;
320 printk(KERN_WARNING "NFS: v4 server %s "
321 "does not accept raw "
323 "Reenabling the idmapper.\n",
324 server->nfs_client->cl_hostname);
327 /* We failed to handle the error */
328 return nfs4_map_errors(ret);
330 ret = nfs4_wait_clnt_recover(clp);
332 exception->retry = 1;
337 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
339 spin_lock(&clp->cl_lock);
340 if (time_before(clp->cl_last_renewal,timestamp))
341 clp->cl_last_renewal = timestamp;
342 spin_unlock(&clp->cl_lock);
345 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
347 do_renew_lease(server->nfs_client, timestamp);
350 #if defined(CONFIG_NFS_V4_1)
353 * nfs4_free_slot - free a slot and efficiently update slot table.
355 * freeing a slot is trivially done by clearing its respective bit
357 * If the freed slotid equals highest_used_slotid we want to update it
358 * so that the server would be able to size down the slot table if needed,
359 * otherwise we know that the highest_used_slotid is still in use.
360 * When updating highest_used_slotid there may be "holes" in the bitmap
361 * so we need to scan down from highest_used_slotid to 0 looking for the now
362 * highest slotid in use.
363 * If none found, highest_used_slotid is set to -1.
365 * Must be called while holding tbl->slot_tbl_lock
368 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
370 int slotid = free_slotid;
372 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
373 /* clear used bit in bitmap */
374 __clear_bit(slotid, tbl->used_slots);
376 /* update highest_used_slotid when it is freed */
377 if (slotid == tbl->highest_used_slotid) {
378 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
379 if (slotid < tbl->max_slots)
380 tbl->highest_used_slotid = slotid;
382 tbl->highest_used_slotid = -1;
384 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
385 free_slotid, tbl->highest_used_slotid);
388 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
390 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
395 * Signal state manager thread if session fore channel is drained
397 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
399 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
400 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
401 nfs4_set_task_privileged, NULL);
405 if (ses->fc_slot_table.highest_used_slotid != -1)
408 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
409 complete(&ses->fc_slot_table.complete);
413 * Signal state manager thread if session back channel is drained
415 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
417 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
418 ses->bc_slot_table.highest_used_slotid != -1)
420 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
421 complete(&ses->bc_slot_table.complete);
424 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
426 struct nfs4_slot_table *tbl;
428 tbl = &res->sr_session->fc_slot_table;
430 /* just wake up the next guy waiting since
431 * we may have not consumed a slot after all */
432 dprintk("%s: No slot\n", __func__);
436 spin_lock(&tbl->slot_tbl_lock);
437 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
438 nfs4_check_drain_fc_complete(res->sr_session);
439 spin_unlock(&tbl->slot_tbl_lock);
443 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
445 unsigned long timestamp;
446 struct nfs_client *clp;
449 * sr_status remains 1 if an RPC level error occurred. The server
450 * may or may not have processed the sequence operation..
451 * Proceed as if the server received and processed the sequence
454 if (res->sr_status == 1)
455 res->sr_status = NFS_OK;
457 /* don't increment the sequence number if the task wasn't sent */
458 if (!RPC_WAS_SENT(task))
461 /* Check the SEQUENCE operation status */
462 switch (res->sr_status) {
464 /* Update the slot's sequence and clientid lease timer */
465 ++res->sr_slot->seq_nr;
466 timestamp = res->sr_renewal_time;
467 clp = res->sr_session->clp;
468 do_renew_lease(clp, timestamp);
469 /* Check sequence flags */
470 if (res->sr_status_flags != 0)
471 nfs4_schedule_lease_recovery(clp);
474 /* The server detected a resend of the RPC call and
475 * returned NFS4ERR_DELAY as per Section 2.10.6.2
478 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
480 res->sr_slot - res->sr_session->fc_slot_table.slots,
481 res->sr_slot->seq_nr);
484 /* Just update the slot sequence no. */
485 ++res->sr_slot->seq_nr;
488 /* The session may be reset by one of the error handlers. */
489 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
490 nfs41_sequence_free_slot(res);
493 if (!rpc_restart_call(task))
495 rpc_delay(task, NFS4_POLL_RETRY_MAX);
499 static int nfs4_sequence_done(struct rpc_task *task,
500 struct nfs4_sequence_res *res)
502 if (res->sr_session == NULL)
504 return nfs41_sequence_done(task, res);
508 * nfs4_find_slot - efficiently look for a free slot
510 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
511 * If found, we mark the slot as used, update the highest_used_slotid,
512 * and respectively set up the sequence operation args.
513 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
515 * Note: must be called with under the slot_tbl_lock.
518 nfs4_find_slot(struct nfs4_slot_table *tbl)
521 u8 ret_id = NFS4_MAX_SLOT_TABLE;
522 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
524 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
525 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
527 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
528 if (slotid >= tbl->max_slots)
530 __set_bit(slotid, tbl->used_slots);
531 if (slotid > tbl->highest_used_slotid)
532 tbl->highest_used_slotid = slotid;
535 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
536 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
540 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
541 struct nfs4_sequence_res *res, int cache_reply)
543 args->sa_session = NULL;
544 args->sa_cache_this = 0;
546 args->sa_cache_this = 1;
547 res->sr_session = NULL;
551 int nfs41_setup_sequence(struct nfs4_session *session,
552 struct nfs4_sequence_args *args,
553 struct nfs4_sequence_res *res,
554 struct rpc_task *task)
556 struct nfs4_slot *slot;
557 struct nfs4_slot_table *tbl;
560 dprintk("--> %s\n", __func__);
561 /* slot already allocated? */
562 if (res->sr_slot != NULL)
565 tbl = &session->fc_slot_table;
567 spin_lock(&tbl->slot_tbl_lock);
568 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
569 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
570 /* The state manager will wait until the slot table is empty */
571 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
572 spin_unlock(&tbl->slot_tbl_lock);
573 dprintk("%s session is draining\n", __func__);
577 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
578 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
579 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
580 spin_unlock(&tbl->slot_tbl_lock);
581 dprintk("%s enforce FIFO order\n", __func__);
585 slotid = nfs4_find_slot(tbl);
586 if (slotid == NFS4_MAX_SLOT_TABLE) {
587 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
588 spin_unlock(&tbl->slot_tbl_lock);
589 dprintk("<-- %s: no free slots\n", __func__);
592 spin_unlock(&tbl->slot_tbl_lock);
594 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
595 slot = tbl->slots + slotid;
596 args->sa_session = session;
597 args->sa_slotid = slotid;
599 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
601 res->sr_session = session;
603 res->sr_renewal_time = jiffies;
604 res->sr_status_flags = 0;
606 * sr_status is only set in decode_sequence, and so will remain
607 * set to 1 if an rpc level failure occurs.
612 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
614 int nfs4_setup_sequence(const struct nfs_server *server,
615 struct nfs4_sequence_args *args,
616 struct nfs4_sequence_res *res,
617 struct rpc_task *task)
619 struct nfs4_session *session = nfs4_get_session(server);
625 dprintk("--> %s clp %p session %p sr_slot %td\n",
626 __func__, session->clp, session, res->sr_slot ?
627 res->sr_slot - session->fc_slot_table.slots : -1);
629 ret = nfs41_setup_sequence(session, args, res, task);
631 dprintk("<-- %s status=%d\n", __func__, ret);
635 struct nfs41_call_sync_data {
636 const struct nfs_server *seq_server;
637 struct nfs4_sequence_args *seq_args;
638 struct nfs4_sequence_res *seq_res;
641 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
643 struct nfs41_call_sync_data *data = calldata;
645 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
647 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
648 data->seq_res, task))
650 rpc_call_start(task);
653 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
655 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
656 nfs41_call_sync_prepare(task, calldata);
659 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
661 struct nfs41_call_sync_data *data = calldata;
663 nfs41_sequence_done(task, data->seq_res);
666 struct rpc_call_ops nfs41_call_sync_ops = {
667 .rpc_call_prepare = nfs41_call_sync_prepare,
668 .rpc_call_done = nfs41_call_sync_done,
671 struct rpc_call_ops nfs41_call_priv_sync_ops = {
672 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
673 .rpc_call_done = nfs41_call_sync_done,
676 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
677 struct nfs_server *server,
678 struct rpc_message *msg,
679 struct nfs4_sequence_args *args,
680 struct nfs4_sequence_res *res,
684 struct rpc_task *task;
685 struct nfs41_call_sync_data data = {
686 .seq_server = server,
690 struct rpc_task_setup task_setup = {
693 .callback_ops = &nfs41_call_sync_ops,
694 .callback_data = &data
698 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
699 task = rpc_run_task(&task_setup);
703 ret = task->tk_status;
709 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
710 struct nfs_server *server,
711 struct rpc_message *msg,
712 struct nfs4_sequence_args *args,
713 struct nfs4_sequence_res *res,
716 nfs41_init_sequence(args, res, cache_reply);
717 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
722 void nfs41_init_sequence(struct nfs4_sequence_args *args,
723 struct nfs4_sequence_res *res, int cache_reply)
727 static int nfs4_sequence_done(struct rpc_task *task,
728 struct nfs4_sequence_res *res)
732 #endif /* CONFIG_NFS_V4_1 */
734 int _nfs4_call_sync(struct rpc_clnt *clnt,
735 struct nfs_server *server,
736 struct rpc_message *msg,
737 struct nfs4_sequence_args *args,
738 struct nfs4_sequence_res *res,
741 nfs41_init_sequence(args, res, cache_reply);
742 return rpc_call_sync(clnt, msg, 0);
746 int nfs4_call_sync(struct rpc_clnt *clnt,
747 struct nfs_server *server,
748 struct rpc_message *msg,
749 struct nfs4_sequence_args *args,
750 struct nfs4_sequence_res *res,
753 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
754 args, res, cache_reply);
757 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
759 struct nfs_inode *nfsi = NFS_I(dir);
761 spin_lock(&dir->i_lock);
762 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
763 if (!cinfo->atomic || cinfo->before != dir->i_version)
764 nfs_force_lookup_revalidate(dir);
765 dir->i_version = cinfo->after;
766 spin_unlock(&dir->i_lock);
769 struct nfs4_opendata {
771 struct nfs_openargs o_arg;
772 struct nfs_openres o_res;
773 struct nfs_open_confirmargs c_arg;
774 struct nfs_open_confirmres c_res;
775 struct nfs4_string owner_name;
776 struct nfs4_string group_name;
777 struct nfs_fattr f_attr;
778 struct nfs_fattr dir_attr;
780 struct dentry *dentry;
781 struct nfs4_state_owner *owner;
782 struct nfs4_state *state;
784 unsigned long timestamp;
785 unsigned int rpc_done : 1;
791 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
793 p->o_res.f_attr = &p->f_attr;
794 p->o_res.dir_attr = &p->dir_attr;
795 p->o_res.seqid = p->o_arg.seqid;
796 p->c_res.seqid = p->c_arg.seqid;
797 p->o_res.server = p->o_arg.server;
798 nfs_fattr_init(&p->f_attr);
799 nfs_fattr_init(&p->dir_attr);
800 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
803 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
804 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
805 const struct iattr *attrs,
808 struct dentry *parent = dget_parent(dentry);
809 struct inode *dir = parent->d_inode;
810 struct nfs_server *server = NFS_SERVER(dir);
811 struct nfs4_opendata *p;
813 p = kzalloc(sizeof(*p), gfp_mask);
816 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
817 if (p->o_arg.seqid == NULL)
819 nfs_sb_active(dentry->d_sb);
820 p->dentry = dget(dentry);
823 atomic_inc(&sp->so_count);
824 p->o_arg.fh = NFS_FH(dir);
825 p->o_arg.open_flags = flags;
826 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
827 p->o_arg.clientid = server->nfs_client->cl_clientid;
828 p->o_arg.id = sp->so_seqid.owner_id;
829 p->o_arg.name = &dentry->d_name;
830 p->o_arg.server = server;
831 p->o_arg.bitmask = server->attr_bitmask;
832 p->o_arg.dir_bitmask = server->cache_consistency_bitmask;
833 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
834 if (attrs != NULL && attrs->ia_valid != 0) {
837 p->o_arg.u.attrs = &p->attrs;
838 memcpy(&p->attrs, attrs, sizeof(p->attrs));
839 s = (u32 *) p->o_arg.u.verifier.data;
843 p->c_arg.fh = &p->o_res.fh;
844 p->c_arg.stateid = &p->o_res.stateid;
845 p->c_arg.seqid = p->o_arg.seqid;
846 nfs4_init_opendata_res(p);
856 static void nfs4_opendata_free(struct kref *kref)
858 struct nfs4_opendata *p = container_of(kref,
859 struct nfs4_opendata, kref);
860 struct super_block *sb = p->dentry->d_sb;
862 nfs_free_seqid(p->o_arg.seqid);
863 if (p->state != NULL)
864 nfs4_put_open_state(p->state);
865 nfs4_put_state_owner(p->owner);
869 nfs_fattr_free_names(&p->f_attr);
873 static void nfs4_opendata_put(struct nfs4_opendata *p)
876 kref_put(&p->kref, nfs4_opendata_free);
879 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
883 ret = rpc_wait_for_completion_task(task);
887 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
891 if (open_mode & (O_EXCL|O_TRUNC))
893 switch (mode & (FMODE_READ|FMODE_WRITE)) {
895 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
896 && state->n_rdonly != 0;
899 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
900 && state->n_wronly != 0;
902 case FMODE_READ|FMODE_WRITE:
903 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
904 && state->n_rdwr != 0;
910 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
912 if (delegation == NULL)
914 if ((delegation->type & fmode) != fmode)
916 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
918 nfs_mark_delegation_referenced(delegation);
922 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
931 case FMODE_READ|FMODE_WRITE:
934 nfs4_state_set_mode_locked(state, state->state | fmode);
937 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
939 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
940 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
941 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
944 set_bit(NFS_O_RDONLY_STATE, &state->flags);
947 set_bit(NFS_O_WRONLY_STATE, &state->flags);
949 case FMODE_READ|FMODE_WRITE:
950 set_bit(NFS_O_RDWR_STATE, &state->flags);
954 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
956 write_seqlock(&state->seqlock);
957 nfs_set_open_stateid_locked(state, stateid, fmode);
958 write_sequnlock(&state->seqlock);
961 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
964 * Protect the call to nfs4_state_set_mode_locked and
965 * serialise the stateid update
967 write_seqlock(&state->seqlock);
968 if (deleg_stateid != NULL) {
969 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
970 set_bit(NFS_DELEGATED_STATE, &state->flags);
972 if (open_stateid != NULL)
973 nfs_set_open_stateid_locked(state, open_stateid, fmode);
974 write_sequnlock(&state->seqlock);
975 spin_lock(&state->owner->so_lock);
976 update_open_stateflags(state, fmode);
977 spin_unlock(&state->owner->so_lock);
980 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
982 struct nfs_inode *nfsi = NFS_I(state->inode);
983 struct nfs_delegation *deleg_cur;
986 fmode &= (FMODE_READ|FMODE_WRITE);
989 deleg_cur = rcu_dereference(nfsi->delegation);
990 if (deleg_cur == NULL)
993 spin_lock(&deleg_cur->lock);
994 if (nfsi->delegation != deleg_cur ||
995 (deleg_cur->type & fmode) != fmode)
996 goto no_delegation_unlock;
998 if (delegation == NULL)
999 delegation = &deleg_cur->stateid;
1000 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
1001 goto no_delegation_unlock;
1003 nfs_mark_delegation_referenced(deleg_cur);
1004 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1006 no_delegation_unlock:
1007 spin_unlock(&deleg_cur->lock);
1011 if (!ret && open_stateid != NULL) {
1012 __update_open_stateid(state, open_stateid, NULL, fmode);
1020 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1022 struct nfs_delegation *delegation;
1025 delegation = rcu_dereference(NFS_I(inode)->delegation);
1026 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1031 nfs_inode_return_delegation(inode);
1034 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1036 struct nfs4_state *state = opendata->state;
1037 struct nfs_inode *nfsi = NFS_I(state->inode);
1038 struct nfs_delegation *delegation;
1039 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1040 fmode_t fmode = opendata->o_arg.fmode;
1041 nfs4_stateid stateid;
1045 if (can_open_cached(state, fmode, open_mode)) {
1046 spin_lock(&state->owner->so_lock);
1047 if (can_open_cached(state, fmode, open_mode)) {
1048 update_open_stateflags(state, fmode);
1049 spin_unlock(&state->owner->so_lock);
1050 goto out_return_state;
1052 spin_unlock(&state->owner->so_lock);
1055 delegation = rcu_dereference(nfsi->delegation);
1056 if (!can_open_delegated(delegation, fmode)) {
1060 /* Save the delegation */
1061 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1063 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1068 /* Try to update the stateid using the delegation */
1069 if (update_open_stateid(state, NULL, &stateid, fmode))
1070 goto out_return_state;
1073 return ERR_PTR(ret);
1075 atomic_inc(&state->count);
1079 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1081 struct inode *inode;
1082 struct nfs4_state *state = NULL;
1083 struct nfs_delegation *delegation;
1086 if (!data->rpc_done) {
1087 state = nfs4_try_open_cached(data);
1092 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1094 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1095 ret = PTR_ERR(inode);
1099 state = nfs4_get_open_state(inode, data->owner);
1102 if (data->o_res.delegation_type != 0) {
1103 int delegation_flags = 0;
1106 delegation = rcu_dereference(NFS_I(inode)->delegation);
1108 delegation_flags = delegation->flags;
1110 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1111 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1112 "returning a delegation for "
1113 "OPEN(CLAIM_DELEGATE_CUR)\n",
1114 NFS_CLIENT(inode)->cl_server);
1115 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1116 nfs_inode_set_delegation(state->inode,
1117 data->owner->so_cred,
1120 nfs_inode_reclaim_delegation(state->inode,
1121 data->owner->so_cred,
1125 update_open_stateid(state, &data->o_res.stateid, NULL,
1133 return ERR_PTR(ret);
1136 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1138 struct nfs_inode *nfsi = NFS_I(state->inode);
1139 struct nfs_open_context *ctx;
1141 spin_lock(&state->inode->i_lock);
1142 list_for_each_entry(ctx, &nfsi->open_files, list) {
1143 if (ctx->state != state)
1145 get_nfs_open_context(ctx);
1146 spin_unlock(&state->inode->i_lock);
1149 spin_unlock(&state->inode->i_lock);
1150 return ERR_PTR(-ENOENT);
1153 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1155 struct nfs4_opendata *opendata;
1157 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1158 if (opendata == NULL)
1159 return ERR_PTR(-ENOMEM);
1160 opendata->state = state;
1161 atomic_inc(&state->count);
1165 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1167 struct nfs4_state *newstate;
1170 opendata->o_arg.open_flags = 0;
1171 opendata->o_arg.fmode = fmode;
1172 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1173 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1174 nfs4_init_opendata_res(opendata);
1175 ret = _nfs4_recover_proc_open(opendata);
1178 newstate = nfs4_opendata_to_nfs4_state(opendata);
1179 if (IS_ERR(newstate))
1180 return PTR_ERR(newstate);
1181 nfs4_close_state(newstate, fmode);
1186 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1188 struct nfs4_state *newstate;
1191 /* memory barrier prior to reading state->n_* */
1192 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1194 if (state->n_rdwr != 0) {
1195 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1196 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1199 if (newstate != state)
1202 if (state->n_wronly != 0) {
1203 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1204 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1207 if (newstate != state)
1210 if (state->n_rdonly != 0) {
1211 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1212 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1215 if (newstate != state)
1219 * We may have performed cached opens for all three recoveries.
1220 * Check if we need to update the current stateid.
1222 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1223 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1224 write_seqlock(&state->seqlock);
1225 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1226 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1227 write_sequnlock(&state->seqlock);
1234 * reclaim state on the server after a reboot.
1236 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1238 struct nfs_delegation *delegation;
1239 struct nfs4_opendata *opendata;
1240 fmode_t delegation_type = 0;
1243 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1244 if (IS_ERR(opendata))
1245 return PTR_ERR(opendata);
1246 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1247 opendata->o_arg.fh = NFS_FH(state->inode);
1249 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1250 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1251 delegation_type = delegation->type;
1253 opendata->o_arg.u.delegation_type = delegation_type;
1254 status = nfs4_open_recover(opendata, state);
1255 nfs4_opendata_put(opendata);
1259 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1261 struct nfs_server *server = NFS_SERVER(state->inode);
1262 struct nfs4_exception exception = { };
1265 err = _nfs4_do_open_reclaim(ctx, state);
1266 if (err != -NFS4ERR_DELAY)
1268 nfs4_handle_exception(server, err, &exception);
1269 } while (exception.retry);
1273 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1275 struct nfs_open_context *ctx;
1278 ctx = nfs4_state_find_open_context(state);
1280 return PTR_ERR(ctx);
1281 ret = nfs4_do_open_reclaim(ctx, state);
1282 put_nfs_open_context(ctx);
1286 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1288 struct nfs4_opendata *opendata;
1291 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1292 if (IS_ERR(opendata))
1293 return PTR_ERR(opendata);
1294 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1295 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1296 sizeof(opendata->o_arg.u.delegation.data));
1297 ret = nfs4_open_recover(opendata, state);
1298 nfs4_opendata_put(opendata);
1302 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1304 struct nfs4_exception exception = { };
1305 struct nfs_server *server = NFS_SERVER(state->inode);
1308 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1314 case -NFS4ERR_BADSESSION:
1315 case -NFS4ERR_BADSLOT:
1316 case -NFS4ERR_BAD_HIGH_SLOT:
1317 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1318 case -NFS4ERR_DEADSESSION:
1319 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1321 case -NFS4ERR_STALE_CLIENTID:
1322 case -NFS4ERR_STALE_STATEID:
1323 case -NFS4ERR_EXPIRED:
1324 /* Don't recall a delegation if it was lost */
1325 nfs4_schedule_lease_recovery(server->nfs_client);
1329 * The show must go on: exit, but mark the
1330 * stateid as needing recovery.
1332 case -NFS4ERR_ADMIN_REVOKED:
1333 case -NFS4ERR_BAD_STATEID:
1334 nfs4_schedule_stateid_recovery(server, state);
1337 * User RPCSEC_GSS context has expired.
1338 * We cannot recover this stateid now, so
1339 * skip it and allow recovery thread to
1346 err = nfs4_handle_exception(server, err, &exception);
1347 } while (exception.retry);
1352 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1354 struct nfs4_opendata *data = calldata;
1356 data->rpc_status = task->tk_status;
1357 if (data->rpc_status == 0) {
1358 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1359 sizeof(data->o_res.stateid.data));
1360 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1361 renew_lease(data->o_res.server, data->timestamp);
1366 static void nfs4_open_confirm_release(void *calldata)
1368 struct nfs4_opendata *data = calldata;
1369 struct nfs4_state *state = NULL;
1371 /* If this request hasn't been cancelled, do nothing */
1372 if (data->cancelled == 0)
1374 /* In case of error, no cleanup! */
1375 if (!data->rpc_done)
1377 state = nfs4_opendata_to_nfs4_state(data);
1379 nfs4_close_state(state, data->o_arg.fmode);
1381 nfs4_opendata_put(data);
1384 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1385 .rpc_call_done = nfs4_open_confirm_done,
1386 .rpc_release = nfs4_open_confirm_release,
1390 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1392 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1394 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1395 struct rpc_task *task;
1396 struct rpc_message msg = {
1397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1398 .rpc_argp = &data->c_arg,
1399 .rpc_resp = &data->c_res,
1400 .rpc_cred = data->owner->so_cred,
1402 struct rpc_task_setup task_setup_data = {
1403 .rpc_client = server->client,
1404 .rpc_message = &msg,
1405 .callback_ops = &nfs4_open_confirm_ops,
1406 .callback_data = data,
1407 .workqueue = nfsiod_workqueue,
1408 .flags = RPC_TASK_ASYNC,
1412 kref_get(&data->kref);
1414 data->rpc_status = 0;
1415 data->timestamp = jiffies;
1416 task = rpc_run_task(&task_setup_data);
1418 return PTR_ERR(task);
1419 status = nfs4_wait_for_completion_rpc_task(task);
1421 data->cancelled = 1;
1424 status = data->rpc_status;
1429 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1431 struct nfs4_opendata *data = calldata;
1432 struct nfs4_state_owner *sp = data->owner;
1434 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1437 * Check if we still need to send an OPEN call, or if we can use
1438 * a delegation instead.
1440 if (data->state != NULL) {
1441 struct nfs_delegation *delegation;
1443 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1446 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1447 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1448 can_open_delegated(delegation, data->o_arg.fmode))
1449 goto unlock_no_action;
1452 /* Update sequence id. */
1453 data->o_arg.id = sp->so_seqid.owner_id;
1454 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1455 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1456 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1457 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1459 data->timestamp = jiffies;
1460 if (nfs4_setup_sequence(data->o_arg.server,
1461 &data->o_arg.seq_args,
1462 &data->o_res.seq_res, task))
1464 rpc_call_start(task);
1469 task->tk_action = NULL;
1473 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1475 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1476 nfs4_open_prepare(task, calldata);
1479 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1481 struct nfs4_opendata *data = calldata;
1483 data->rpc_status = task->tk_status;
1485 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1488 if (task->tk_status == 0) {
1489 switch (data->o_res.f_attr->mode & S_IFMT) {
1493 data->rpc_status = -ELOOP;
1496 data->rpc_status = -EISDIR;
1499 data->rpc_status = -ENOTDIR;
1501 renew_lease(data->o_res.server, data->timestamp);
1502 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1503 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1508 static void nfs4_open_release(void *calldata)
1510 struct nfs4_opendata *data = calldata;
1511 struct nfs4_state *state = NULL;
1513 /* If this request hasn't been cancelled, do nothing */
1514 if (data->cancelled == 0)
1516 /* In case of error, no cleanup! */
1517 if (data->rpc_status != 0 || !data->rpc_done)
1519 /* In case we need an open_confirm, no cleanup! */
1520 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1522 state = nfs4_opendata_to_nfs4_state(data);
1524 nfs4_close_state(state, data->o_arg.fmode);
1526 nfs4_opendata_put(data);
1529 static const struct rpc_call_ops nfs4_open_ops = {
1530 .rpc_call_prepare = nfs4_open_prepare,
1531 .rpc_call_done = nfs4_open_done,
1532 .rpc_release = nfs4_open_release,
1535 static const struct rpc_call_ops nfs4_recover_open_ops = {
1536 .rpc_call_prepare = nfs4_recover_open_prepare,
1537 .rpc_call_done = nfs4_open_done,
1538 .rpc_release = nfs4_open_release,
1541 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1543 struct inode *dir = data->dir->d_inode;
1544 struct nfs_server *server = NFS_SERVER(dir);
1545 struct nfs_openargs *o_arg = &data->o_arg;
1546 struct nfs_openres *o_res = &data->o_res;
1547 struct rpc_task *task;
1548 struct rpc_message msg = {
1549 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1552 .rpc_cred = data->owner->so_cred,
1554 struct rpc_task_setup task_setup_data = {
1555 .rpc_client = server->client,
1556 .rpc_message = &msg,
1557 .callback_ops = &nfs4_open_ops,
1558 .callback_data = data,
1559 .workqueue = nfsiod_workqueue,
1560 .flags = RPC_TASK_ASYNC,
1564 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1565 kref_get(&data->kref);
1567 data->rpc_status = 0;
1568 data->cancelled = 0;
1570 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1571 task = rpc_run_task(&task_setup_data);
1573 return PTR_ERR(task);
1574 status = nfs4_wait_for_completion_rpc_task(task);
1576 data->cancelled = 1;
1579 status = data->rpc_status;
1585 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1587 struct inode *dir = data->dir->d_inode;
1588 struct nfs_openres *o_res = &data->o_res;
1591 status = nfs4_run_open_task(data, 1);
1592 if (status != 0 || !data->rpc_done)
1595 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1597 nfs_refresh_inode(dir, o_res->dir_attr);
1599 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1600 status = _nfs4_proc_open_confirm(data);
1609 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1611 static int _nfs4_proc_open(struct nfs4_opendata *data)
1613 struct inode *dir = data->dir->d_inode;
1614 struct nfs_server *server = NFS_SERVER(dir);
1615 struct nfs_openargs *o_arg = &data->o_arg;
1616 struct nfs_openres *o_res = &data->o_res;
1619 status = nfs4_run_open_task(data, 0);
1620 if (!data->rpc_done)
1623 if (status == -NFS4ERR_BADNAME &&
1624 !(o_arg->open_flags & O_CREAT))
1629 nfs_fattr_map_and_free_names(server, &data->f_attr);
1631 if (o_arg->open_flags & O_CREAT) {
1632 update_changeattr(dir, &o_res->cinfo);
1633 nfs_post_op_update_inode(dir, o_res->dir_attr);
1635 nfs_refresh_inode(dir, o_res->dir_attr);
1636 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1637 server->caps &= ~NFS_CAP_POSIX_LOCK;
1638 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1639 status = _nfs4_proc_open_confirm(data);
1643 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1644 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1648 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1653 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1654 ret = nfs4_wait_clnt_recover(clp);
1657 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1658 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1660 nfs4_schedule_state_manager(clp);
1666 static int nfs4_recover_expired_lease(struct nfs_server *server)
1668 return nfs4_client_recover_expired_lease(server->nfs_client);
1673 * reclaim state on the server after a network partition.
1674 * Assumes caller holds the appropriate lock
1676 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1678 struct nfs4_opendata *opendata;
1681 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1682 if (IS_ERR(opendata))
1683 return PTR_ERR(opendata);
1684 ret = nfs4_open_recover(opendata, state);
1686 d_drop(ctx->dentry);
1687 nfs4_opendata_put(opendata);
1691 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1693 struct nfs_server *server = NFS_SERVER(state->inode);
1694 struct nfs4_exception exception = { };
1698 err = _nfs4_open_expired(ctx, state);
1702 case -NFS4ERR_GRACE:
1703 case -NFS4ERR_DELAY:
1704 nfs4_handle_exception(server, err, &exception);
1707 } while (exception.retry);
1712 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1714 struct nfs_open_context *ctx;
1717 ctx = nfs4_state_find_open_context(state);
1719 return PTR_ERR(ctx);
1720 ret = nfs4_do_open_expired(ctx, state);
1721 put_nfs_open_context(ctx);
1725 #if defined(CONFIG_NFS_V4_1)
1726 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1729 struct nfs_server *server = NFS_SERVER(state->inode);
1731 status = nfs41_test_stateid(server, state);
1732 if (status == NFS_OK)
1734 nfs41_free_stateid(server, state);
1735 return nfs4_open_expired(sp, state);
1740 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1741 * fields corresponding to attributes that were used to store the verifier.
1742 * Make sure we clobber those fields in the later setattr call
1744 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1746 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1747 !(sattr->ia_valid & ATTR_ATIME_SET))
1748 sattr->ia_valid |= ATTR_ATIME;
1750 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1751 !(sattr->ia_valid & ATTR_MTIME_SET))
1752 sattr->ia_valid |= ATTR_MTIME;
1756 * Returns a referenced nfs4_state
1758 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)
1760 struct nfs4_state_owner *sp;
1761 struct nfs4_state *state = NULL;
1762 struct nfs_server *server = NFS_SERVER(dir);
1763 struct nfs4_opendata *opendata;
1766 /* Protect against reboot recovery conflicts */
1768 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1770 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1773 status = nfs4_recover_expired_lease(server);
1775 goto err_put_state_owner;
1776 if (dentry->d_inode != NULL)
1777 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1779 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1780 if (opendata == NULL)
1781 goto err_put_state_owner;
1783 if (dentry->d_inode != NULL)
1784 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1786 status = _nfs4_proc_open(opendata);
1788 goto err_opendata_put;
1790 state = nfs4_opendata_to_nfs4_state(opendata);
1791 status = PTR_ERR(state);
1793 goto err_opendata_put;
1794 if (server->caps & NFS_CAP_POSIX_LOCK)
1795 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1797 if (opendata->o_arg.open_flags & O_EXCL) {
1798 nfs4_exclusive_attrset(opendata, sattr);
1800 nfs_fattr_init(opendata->o_res.f_attr);
1801 status = nfs4_do_setattr(state->inode, cred,
1802 opendata->o_res.f_attr, sattr,
1805 nfs_setattr_update_inode(state->inode, sattr);
1806 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1808 nfs4_opendata_put(opendata);
1809 nfs4_put_state_owner(sp);
1813 nfs4_opendata_put(opendata);
1814 err_put_state_owner:
1815 nfs4_put_state_owner(sp);
1822 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)
1824 struct nfs4_exception exception = { };
1825 struct nfs4_state *res;
1829 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1832 /* NOTE: BAD_SEQID means the server and client disagree about the
1833 * book-keeping w.r.t. state-changing operations
1834 * (OPEN/CLOSE/LOCK/LOCKU...)
1835 * It is actually a sign of a bug on the client or on the server.
1837 * If we receive a BAD_SEQID error in the particular case of
1838 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1839 * have unhashed the old state_owner for us, and that we can
1840 * therefore safely retry using a new one. We should still warn
1841 * the user though...
1843 if (status == -NFS4ERR_BAD_SEQID) {
1844 printk(KERN_WARNING "NFS: v4 server %s "
1845 " returned a bad sequence-id error!\n",
1846 NFS_SERVER(dir)->nfs_client->cl_hostname);
1847 exception.retry = 1;
1851 * BAD_STATEID on OPEN means that the server cancelled our
1852 * state before it received the OPEN_CONFIRM.
1853 * Recover by retrying the request as per the discussion
1854 * on Page 181 of RFC3530.
1856 if (status == -NFS4ERR_BAD_STATEID) {
1857 exception.retry = 1;
1860 if (status == -EAGAIN) {
1861 /* We must have found a delegation */
1862 exception.retry = 1;
1865 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1866 status, &exception));
1867 } while (exception.retry);
1871 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1872 struct nfs_fattr *fattr, struct iattr *sattr,
1873 struct nfs4_state *state)
1875 struct nfs_server *server = NFS_SERVER(inode);
1876 struct nfs_setattrargs arg = {
1877 .fh = NFS_FH(inode),
1880 .bitmask = server->attr_bitmask,
1882 struct nfs_setattrres res = {
1886 struct rpc_message msg = {
1887 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1892 unsigned long timestamp = jiffies;
1895 nfs_fattr_init(fattr);
1897 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1898 /* Use that stateid */
1899 } else if (state != NULL) {
1900 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1902 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1904 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1905 if (status == 0 && state != NULL)
1906 renew_lease(server, timestamp);
1910 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1911 struct nfs_fattr *fattr, struct iattr *sattr,
1912 struct nfs4_state *state)
1914 struct nfs_server *server = NFS_SERVER(inode);
1915 struct nfs4_exception exception = { };
1918 err = nfs4_handle_exception(server,
1919 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1921 } while (exception.retry);
1925 struct nfs4_closedata {
1926 struct inode *inode;
1927 struct nfs4_state *state;
1928 struct nfs_closeargs arg;
1929 struct nfs_closeres res;
1930 struct nfs_fattr fattr;
1931 unsigned long timestamp;
1936 static void nfs4_free_closedata(void *data)
1938 struct nfs4_closedata *calldata = data;
1939 struct nfs4_state_owner *sp = calldata->state->owner;
1940 struct super_block *sb = calldata->state->inode->i_sb;
1943 pnfs_roc_release(calldata->state->inode);
1944 nfs4_put_open_state(calldata->state);
1945 nfs_free_seqid(calldata->arg.seqid);
1946 nfs4_put_state_owner(sp);
1947 nfs_sb_deactive(sb);
1951 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1954 spin_lock(&state->owner->so_lock);
1955 if (!(fmode & FMODE_READ))
1956 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1957 if (!(fmode & FMODE_WRITE))
1958 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1959 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1960 spin_unlock(&state->owner->so_lock);
1963 static void nfs4_close_done(struct rpc_task *task, void *data)
1965 struct nfs4_closedata *calldata = data;
1966 struct nfs4_state *state = calldata->state;
1967 struct nfs_server *server = NFS_SERVER(calldata->inode);
1969 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1971 /* hmm. we are done with the inode, and in the process of freeing
1972 * the state_owner. we keep this around to process errors
1974 switch (task->tk_status) {
1977 pnfs_roc_set_barrier(state->inode,
1978 calldata->roc_barrier);
1979 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1980 renew_lease(server, calldata->timestamp);
1981 nfs4_close_clear_stateid_flags(state,
1982 calldata->arg.fmode);
1984 case -NFS4ERR_STALE_STATEID:
1985 case -NFS4ERR_OLD_STATEID:
1986 case -NFS4ERR_BAD_STATEID:
1987 case -NFS4ERR_EXPIRED:
1988 if (calldata->arg.fmode == 0)
1991 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1992 rpc_restart_call_prepare(task);
1994 nfs_release_seqid(calldata->arg.seqid);
1995 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1998 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2000 struct nfs4_closedata *calldata = data;
2001 struct nfs4_state *state = calldata->state;
2004 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2007 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2008 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2009 spin_lock(&state->owner->so_lock);
2010 /* Calculate the change in open mode */
2011 if (state->n_rdwr == 0) {
2012 if (state->n_rdonly == 0) {
2013 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2014 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2015 calldata->arg.fmode &= ~FMODE_READ;
2017 if (state->n_wronly == 0) {
2018 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2019 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2020 calldata->arg.fmode &= ~FMODE_WRITE;
2023 spin_unlock(&state->owner->so_lock);
2026 /* Note: exit _without_ calling nfs4_close_done */
2027 task->tk_action = NULL;
2031 if (calldata->arg.fmode == 0) {
2032 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2033 if (calldata->roc &&
2034 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2035 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2041 nfs_fattr_init(calldata->res.fattr);
2042 calldata->timestamp = jiffies;
2043 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2044 &calldata->arg.seq_args,
2045 &calldata->res.seq_res,
2048 rpc_call_start(task);
2051 static const struct rpc_call_ops nfs4_close_ops = {
2052 .rpc_call_prepare = nfs4_close_prepare,
2053 .rpc_call_done = nfs4_close_done,
2054 .rpc_release = nfs4_free_closedata,
2058 * It is possible for data to be read/written from a mem-mapped file
2059 * after the sys_close call (which hits the vfs layer as a flush).
2060 * This means that we can't safely call nfsv4 close on a file until
2061 * the inode is cleared. This in turn means that we are not good
2062 * NFSv4 citizens - we do not indicate to the server to update the file's
2063 * share state even when we are done with one of the three share
2064 * stateid's in the inode.
2066 * NOTE: Caller must be holding the sp->so_owner semaphore!
2068 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2070 struct nfs_server *server = NFS_SERVER(state->inode);
2071 struct nfs4_closedata *calldata;
2072 struct nfs4_state_owner *sp = state->owner;
2073 struct rpc_task *task;
2074 struct rpc_message msg = {
2075 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2076 .rpc_cred = state->owner->so_cred,
2078 struct rpc_task_setup task_setup_data = {
2079 .rpc_client = server->client,
2080 .rpc_message = &msg,
2081 .callback_ops = &nfs4_close_ops,
2082 .workqueue = nfsiod_workqueue,
2083 .flags = RPC_TASK_ASYNC,
2085 int status = -ENOMEM;
2087 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2088 if (calldata == NULL)
2090 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2091 calldata->inode = state->inode;
2092 calldata->state = state;
2093 calldata->arg.fh = NFS_FH(state->inode);
2094 calldata->arg.stateid = &state->open_stateid;
2095 /* Serialization for the sequence id */
2096 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2097 if (calldata->arg.seqid == NULL)
2098 goto out_free_calldata;
2099 calldata->arg.fmode = 0;
2100 calldata->arg.bitmask = server->cache_consistency_bitmask;
2101 calldata->res.fattr = &calldata->fattr;
2102 calldata->res.seqid = calldata->arg.seqid;
2103 calldata->res.server = server;
2104 calldata->roc = roc;
2105 nfs_sb_active(calldata->inode->i_sb);
2107 msg.rpc_argp = &calldata->arg;
2108 msg.rpc_resp = &calldata->res;
2109 task_setup_data.callback_data = calldata;
2110 task = rpc_run_task(&task_setup_data);
2112 return PTR_ERR(task);
2115 status = rpc_wait_for_completion_task(task);
2122 pnfs_roc_release(state->inode);
2123 nfs4_put_open_state(state);
2124 nfs4_put_state_owner(sp);
2128 static struct inode *
2129 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2131 struct nfs4_state *state;
2133 /* Protect against concurrent sillydeletes */
2134 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2136 return ERR_CAST(state);
2138 return igrab(state->inode);
2141 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2143 if (ctx->state == NULL)
2146 nfs4_close_sync(ctx->state, ctx->mode);
2148 nfs4_close_state(ctx->state, ctx->mode);
2151 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2153 struct nfs4_server_caps_arg args = {
2156 struct nfs4_server_caps_res res = {};
2157 struct rpc_message msg = {
2158 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2164 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2166 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2167 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2168 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2169 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2170 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2171 NFS_CAP_CTIME|NFS_CAP_MTIME);
2172 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2173 server->caps |= NFS_CAP_ACLS;
2174 if (res.has_links != 0)
2175 server->caps |= NFS_CAP_HARDLINKS;
2176 if (res.has_symlinks != 0)
2177 server->caps |= NFS_CAP_SYMLINKS;
2178 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2179 server->caps |= NFS_CAP_FILEID;
2180 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2181 server->caps |= NFS_CAP_MODE;
2182 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2183 server->caps |= NFS_CAP_NLINK;
2184 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2185 server->caps |= NFS_CAP_OWNER;
2186 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2187 server->caps |= NFS_CAP_OWNER_GROUP;
2188 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2189 server->caps |= NFS_CAP_ATIME;
2190 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2191 server->caps |= NFS_CAP_CTIME;
2192 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2193 server->caps |= NFS_CAP_MTIME;
2195 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2196 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2197 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2198 server->acl_bitmask = res.acl_bitmask;
2204 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2206 struct nfs4_exception exception = { };
2209 err = nfs4_handle_exception(server,
2210 _nfs4_server_capabilities(server, fhandle),
2212 } while (exception.retry);
2216 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2217 struct nfs_fsinfo *info)
2219 struct nfs4_lookup_root_arg args = {
2220 .bitmask = nfs4_fattr_bitmap,
2222 struct nfs4_lookup_res res = {
2224 .fattr = info->fattr,
2227 struct rpc_message msg = {
2228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2233 nfs_fattr_init(info->fattr);
2234 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2237 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2238 struct nfs_fsinfo *info)
2240 struct nfs4_exception exception = { };
2243 err = _nfs4_lookup_root(server, fhandle, info);
2246 case -NFS4ERR_WRONGSEC:
2249 err = nfs4_handle_exception(server, err, &exception);
2251 } while (exception.retry);
2255 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2256 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2258 struct rpc_auth *auth;
2261 auth = rpcauth_create(flavor, server->client);
2266 ret = nfs4_lookup_root(server, fhandle, info);
2271 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2272 struct nfs_fsinfo *info)
2274 int i, len, status = 0;
2275 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2277 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2278 flav_array[len] = RPC_AUTH_NULL;
2281 for (i = 0; i < len; i++) {
2282 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2283 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2288 * -EACCESS could mean that the user doesn't have correct permissions
2289 * to access the mount. It could also mean that we tried to mount
2290 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2291 * existing mount programs don't handle -EACCES very well so it should
2292 * be mapped to -EPERM instead.
2294 if (status == -EACCES)
2300 * get the file handle for the "/" directory on the server
2302 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2303 struct nfs_fsinfo *info)
2305 int minor_version = server->nfs_client->cl_minorversion;
2306 int status = nfs4_lookup_root(server, fhandle, info);
2307 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2309 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2310 * by nfs4_map_errors() as this function exits.
2312 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2314 status = nfs4_server_capabilities(server, fhandle);
2316 status = nfs4_do_fsinfo(server, fhandle, info);
2317 return nfs4_map_errors(status);
2320 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
2322 * Get locations and (maybe) other attributes of a referral.
2323 * Note that we'll actually follow the referral later when
2324 * we detect fsid mismatch in inode revalidation
2326 static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2327 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2329 int status = -ENOMEM;
2330 struct page *page = NULL;
2331 struct nfs4_fs_locations *locations = NULL;
2333 page = alloc_page(GFP_KERNEL);
2336 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2337 if (locations == NULL)
2340 status = nfs4_proc_fs_locations(dir, name, locations, page);
2343 /* Make sure server returned a different fsid for the referral */
2344 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2345 dprintk("%s: server did not return a different fsid for"
2346 " a referral at %s\n", __func__, name->name);
2350 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2351 nfs_fixup_referral_attributes(&locations->fattr);
2353 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2354 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2355 memset(fhandle, 0, sizeof(struct nfs_fh));
2363 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2365 struct nfs4_getattr_arg args = {
2367 .bitmask = server->attr_bitmask,
2369 struct nfs4_getattr_res res = {
2373 struct rpc_message msg = {
2374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2379 nfs_fattr_init(fattr);
2380 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2383 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2385 struct nfs4_exception exception = { };
2388 err = nfs4_handle_exception(server,
2389 _nfs4_proc_getattr(server, fhandle, fattr),
2391 } while (exception.retry);
2396 * The file is not closed if it is opened due to the a request to change
2397 * the size of the file. The open call will not be needed once the
2398 * VFS layer lookup-intents are implemented.
2400 * Close is called when the inode is destroyed.
2401 * If we haven't opened the file for O_WRONLY, we
2402 * need to in the size_change case to obtain a stateid.
2405 * Because OPEN is always done by name in nfsv4, it is
2406 * possible that we opened a different file by the same
2407 * name. We can recognize this race condition, but we
2408 * can't do anything about it besides returning an error.
2410 * This will be fixed with VFS changes (lookup-intent).
2413 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2414 struct iattr *sattr)
2416 struct inode *inode = dentry->d_inode;
2417 struct rpc_cred *cred = NULL;
2418 struct nfs4_state *state = NULL;
2421 if (pnfs_ld_layoutret_on_setattr(inode))
2422 pnfs_return_layout(inode);
2424 nfs_fattr_init(fattr);
2426 /* Search for an existing open(O_WRITE) file */
2427 if (sattr->ia_valid & ATTR_FILE) {
2428 struct nfs_open_context *ctx;
2430 ctx = nfs_file_open_context(sattr->ia_file);
2437 /* Deal with open(O_TRUNC) */
2438 if (sattr->ia_valid & ATTR_OPEN)
2439 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2441 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2443 nfs_setattr_update_inode(inode, sattr);
2447 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2448 const struct qstr *name, struct nfs_fh *fhandle,
2449 struct nfs_fattr *fattr)
2451 struct nfs_server *server = NFS_SERVER(dir);
2453 struct nfs4_lookup_arg args = {
2454 .bitmask = server->attr_bitmask,
2455 .dir_fh = NFS_FH(dir),
2458 struct nfs4_lookup_res res = {
2463 struct rpc_message msg = {
2464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2469 nfs_fattr_init(fattr);
2471 dprintk("NFS call lookup %s\n", name->name);
2472 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2473 dprintk("NFS reply lookup: %d\n", status);
2477 void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2479 memset(fh, 0, sizeof(struct nfs_fh));
2480 fattr->fsid.major = 1;
2481 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2482 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2483 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2487 static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2488 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2490 struct nfs4_exception exception = { };
2495 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2497 case -NFS4ERR_BADNAME:
2499 case -NFS4ERR_MOVED:
2500 return nfs4_get_referral(dir, name, fattr, fhandle);
2501 case -NFS4ERR_WRONGSEC:
2502 nfs_fixup_secinfo_attributes(fattr, fhandle);
2504 err = nfs4_handle_exception(NFS_SERVER(dir),
2505 status, &exception);
2506 } while (exception.retry);
2510 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2512 struct nfs_server *server = NFS_SERVER(inode);
2513 struct nfs4_accessargs args = {
2514 .fh = NFS_FH(inode),
2515 .bitmask = server->cache_consistency_bitmask,
2517 struct nfs4_accessres res = {
2520 struct rpc_message msg = {
2521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2524 .rpc_cred = entry->cred,
2526 int mode = entry->mask;
2530 * Determine which access bits we want to ask for...
2532 if (mode & MAY_READ)
2533 args.access |= NFS4_ACCESS_READ;
2534 if (S_ISDIR(inode->i_mode)) {
2535 if (mode & MAY_WRITE)
2536 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2537 if (mode & MAY_EXEC)
2538 args.access |= NFS4_ACCESS_LOOKUP;
2540 if (mode & MAY_WRITE)
2541 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2542 if (mode & MAY_EXEC)
2543 args.access |= NFS4_ACCESS_EXECUTE;
2546 res.fattr = nfs_alloc_fattr();
2547 if (res.fattr == NULL)
2550 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2553 if (res.access & NFS4_ACCESS_READ)
2554 entry->mask |= MAY_READ;
2555 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2556 entry->mask |= MAY_WRITE;
2557 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2558 entry->mask |= MAY_EXEC;
2559 nfs_refresh_inode(inode, res.fattr);
2561 nfs_free_fattr(res.fattr);
2565 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2567 struct nfs4_exception exception = { };
2570 err = nfs4_handle_exception(NFS_SERVER(inode),
2571 _nfs4_proc_access(inode, entry),
2573 } while (exception.retry);
2578 * TODO: For the time being, we don't try to get any attributes
2579 * along with any of the zero-copy operations READ, READDIR,
2582 * In the case of the first three, we want to put the GETATTR
2583 * after the read-type operation -- this is because it is hard
2584 * to predict the length of a GETATTR response in v4, and thus
2585 * align the READ data correctly. This means that the GETATTR
2586 * may end up partially falling into the page cache, and we should
2587 * shift it into the 'tail' of the xdr_buf before processing.
2588 * To do this efficiently, we need to know the total length
2589 * of data received, which doesn't seem to be available outside
2592 * In the case of WRITE, we also want to put the GETATTR after
2593 * the operation -- in this case because we want to make sure
2594 * we get the post-operation mtime and size. This means that
2595 * we can't use xdr_encode_pages() as written: we need a variant
2596 * of it which would leave room in the 'tail' iovec.
2598 * Both of these changes to the XDR layer would in fact be quite
2599 * minor, but I decided to leave them for a subsequent patch.
2601 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2602 unsigned int pgbase, unsigned int pglen)
2604 struct nfs4_readlink args = {
2605 .fh = NFS_FH(inode),
2610 struct nfs4_readlink_res res;
2611 struct rpc_message msg = {
2612 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2617 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2620 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2621 unsigned int pgbase, unsigned int pglen)
2623 struct nfs4_exception exception = { };
2626 err = nfs4_handle_exception(NFS_SERVER(inode),
2627 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2629 } while (exception.retry);
2635 * We will need to arrange for the VFS layer to provide an atomic open.
2636 * Until then, this create/open method is prone to inefficiency and race
2637 * conditions due to the lookup, create, and open VFS calls from sys_open()
2638 * placed on the wire.
2640 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2641 * The file will be opened again in the subsequent VFS open call
2642 * (nfs4_proc_file_open).
2644 * The open for read will just hang around to be used by any process that
2645 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2649 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2650 int flags, struct nfs_open_context *ctx)
2652 struct dentry *de = dentry;
2653 struct nfs4_state *state;
2654 struct rpc_cred *cred = NULL;
2663 sattr->ia_mode &= ~current_umask();
2664 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2666 if (IS_ERR(state)) {
2667 status = PTR_ERR(state);
2670 d_add(dentry, igrab(state->inode));
2671 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2675 nfs4_close_sync(state, fmode);
2680 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2682 struct nfs_server *server = NFS_SERVER(dir);
2683 struct nfs_removeargs args = {
2685 .name.len = name->len,
2686 .name.name = name->name,
2687 .bitmask = server->attr_bitmask,
2689 struct nfs_removeres res = {
2692 struct rpc_message msg = {
2693 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2697 int status = -ENOMEM;
2699 res.dir_attr = nfs_alloc_fattr();
2700 if (res.dir_attr == NULL)
2703 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2705 update_changeattr(dir, &res.cinfo);
2706 nfs_post_op_update_inode(dir, res.dir_attr);
2708 nfs_free_fattr(res.dir_attr);
2713 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2715 struct nfs4_exception exception = { };
2718 err = nfs4_handle_exception(NFS_SERVER(dir),
2719 _nfs4_proc_remove(dir, name),
2721 } while (exception.retry);
2725 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2727 struct nfs_server *server = NFS_SERVER(dir);
2728 struct nfs_removeargs *args = msg->rpc_argp;
2729 struct nfs_removeres *res = msg->rpc_resp;
2731 args->bitmask = server->cache_consistency_bitmask;
2732 res->server = server;
2733 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2734 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2737 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2739 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2741 if (!nfs4_sequence_done(task, &res->seq_res))
2743 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2745 update_changeattr(dir, &res->cinfo);
2746 nfs_post_op_update_inode(dir, res->dir_attr);
2750 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2752 struct nfs_server *server = NFS_SERVER(dir);
2753 struct nfs_renameargs *arg = msg->rpc_argp;
2754 struct nfs_renameres *res = msg->rpc_resp;
2756 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2757 arg->bitmask = server->attr_bitmask;
2758 res->server = server;
2759 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2762 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2763 struct inode *new_dir)
2765 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2767 if (!nfs4_sequence_done(task, &res->seq_res))
2769 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2772 update_changeattr(old_dir, &res->old_cinfo);
2773 nfs_post_op_update_inode(old_dir, res->old_fattr);
2774 update_changeattr(new_dir, &res->new_cinfo);
2775 nfs_post_op_update_inode(new_dir, res->new_fattr);
2779 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2780 struct inode *new_dir, struct qstr *new_name)
2782 struct nfs_server *server = NFS_SERVER(old_dir);
2783 struct nfs_renameargs arg = {
2784 .old_dir = NFS_FH(old_dir),
2785 .new_dir = NFS_FH(new_dir),
2786 .old_name = old_name,
2787 .new_name = new_name,
2788 .bitmask = server->attr_bitmask,
2790 struct nfs_renameres res = {
2793 struct rpc_message msg = {
2794 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2798 int status = -ENOMEM;
2800 res.old_fattr = nfs_alloc_fattr();
2801 res.new_fattr = nfs_alloc_fattr();
2802 if (res.old_fattr == NULL || res.new_fattr == NULL)
2805 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2807 update_changeattr(old_dir, &res.old_cinfo);
2808 nfs_post_op_update_inode(old_dir, res.old_fattr);
2809 update_changeattr(new_dir, &res.new_cinfo);
2810 nfs_post_op_update_inode(new_dir, res.new_fattr);
2813 nfs_free_fattr(res.new_fattr);
2814 nfs_free_fattr(res.old_fattr);
2818 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2819 struct inode *new_dir, struct qstr *new_name)
2821 struct nfs4_exception exception = { };
2824 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2825 _nfs4_proc_rename(old_dir, old_name,
2828 } while (exception.retry);
2832 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2834 struct nfs_server *server = NFS_SERVER(inode);
2835 struct nfs4_link_arg arg = {
2836 .fh = NFS_FH(inode),
2837 .dir_fh = NFS_FH(dir),
2839 .bitmask = server->attr_bitmask,
2841 struct nfs4_link_res res = {
2844 struct rpc_message msg = {
2845 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2849 int status = -ENOMEM;
2851 res.fattr = nfs_alloc_fattr();
2852 res.dir_attr = nfs_alloc_fattr();
2853 if (res.fattr == NULL || res.dir_attr == NULL)
2856 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2858 update_changeattr(dir, &res.cinfo);
2859 nfs_post_op_update_inode(dir, res.dir_attr);
2860 nfs_post_op_update_inode(inode, res.fattr);
2863 nfs_free_fattr(res.dir_attr);
2864 nfs_free_fattr(res.fattr);
2868 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2870 struct nfs4_exception exception = { };
2873 err = nfs4_handle_exception(NFS_SERVER(inode),
2874 _nfs4_proc_link(inode, dir, name),
2876 } while (exception.retry);
2880 struct nfs4_createdata {
2881 struct rpc_message msg;
2882 struct nfs4_create_arg arg;
2883 struct nfs4_create_res res;
2885 struct nfs_fattr fattr;
2886 struct nfs_fattr dir_fattr;
2889 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2890 struct qstr *name, struct iattr *sattr, u32 ftype)
2892 struct nfs4_createdata *data;
2894 data = kzalloc(sizeof(*data), GFP_KERNEL);
2896 struct nfs_server *server = NFS_SERVER(dir);
2898 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2899 data->msg.rpc_argp = &data->arg;
2900 data->msg.rpc_resp = &data->res;
2901 data->arg.dir_fh = NFS_FH(dir);
2902 data->arg.server = server;
2903 data->arg.name = name;
2904 data->arg.attrs = sattr;
2905 data->arg.ftype = ftype;
2906 data->arg.bitmask = server->attr_bitmask;
2907 data->res.server = server;
2908 data->res.fh = &data->fh;
2909 data->res.fattr = &data->fattr;
2910 data->res.dir_fattr = &data->dir_fattr;
2911 nfs_fattr_init(data->res.fattr);
2912 nfs_fattr_init(data->res.dir_fattr);
2917 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2919 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2920 &data->arg.seq_args, &data->res.seq_res, 1);
2922 update_changeattr(dir, &data->res.dir_cinfo);
2923 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2924 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2929 static void nfs4_free_createdata(struct nfs4_createdata *data)
2934 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2935 struct page *page, unsigned int len, struct iattr *sattr)
2937 struct nfs4_createdata *data;
2938 int status = -ENAMETOOLONG;
2940 if (len > NFS4_MAXPATHLEN)
2944 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2948 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2949 data->arg.u.symlink.pages = &page;
2950 data->arg.u.symlink.len = len;
2952 status = nfs4_do_create(dir, dentry, data);
2954 nfs4_free_createdata(data);
2959 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2960 struct page *page, unsigned int len, struct iattr *sattr)
2962 struct nfs4_exception exception = { };
2965 err = nfs4_handle_exception(NFS_SERVER(dir),
2966 _nfs4_proc_symlink(dir, dentry, page,
2969 } while (exception.retry);
2973 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2974 struct iattr *sattr)
2976 struct nfs4_createdata *data;
2977 int status = -ENOMEM;
2979 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2983 status = nfs4_do_create(dir, dentry, data);
2985 nfs4_free_createdata(data);
2990 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2991 struct iattr *sattr)
2993 struct nfs4_exception exception = { };
2996 sattr->ia_mode &= ~current_umask();
2998 err = nfs4_handle_exception(NFS_SERVER(dir),
2999 _nfs4_proc_mkdir(dir, dentry, sattr),
3001 } while (exception.retry);
3005 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3006 u64 cookie, struct page **pages, unsigned int count, int plus)
3008 struct inode *dir = dentry->d_inode;
3009 struct nfs4_readdir_arg args = {
3014 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3017 struct nfs4_readdir_res res;
3018 struct rpc_message msg = {
3019 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3026 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3027 dentry->d_parent->d_name.name,
3028 dentry->d_name.name,
3029 (unsigned long long)cookie);
3030 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3031 res.pgbase = args.pgbase;
3032 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3034 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3035 status += args.pgbase;
3038 nfs_invalidate_atime(dir);
3040 dprintk("%s: returns %d\n", __func__, status);
3044 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3045 u64 cookie, struct page **pages, unsigned int count, int plus)
3047 struct nfs4_exception exception = { };
3050 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3051 _nfs4_proc_readdir(dentry, cred, cookie,
3052 pages, count, plus),
3054 } while (exception.retry);
3058 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3059 struct iattr *sattr, dev_t rdev)
3061 struct nfs4_createdata *data;
3062 int mode = sattr->ia_mode;
3063 int status = -ENOMEM;
3065 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3066 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3068 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3073 data->arg.ftype = NF4FIFO;
3074 else if (S_ISBLK(mode)) {
3075 data->arg.ftype = NF4BLK;
3076 data->arg.u.device.specdata1 = MAJOR(rdev);
3077 data->arg.u.device.specdata2 = MINOR(rdev);
3079 else if (S_ISCHR(mode)) {
3080 data->arg.ftype = NF4CHR;
3081 data->arg.u.device.specdata1 = MAJOR(rdev);
3082 data->arg.u.device.specdata2 = MINOR(rdev);
3085 status = nfs4_do_create(dir, dentry, data);
3087 nfs4_free_createdata(data);
3092 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3093 struct iattr *sattr, dev_t rdev)
3095 struct nfs4_exception exception = { };
3098 sattr->ia_mode &= ~current_umask();
3100 err = nfs4_handle_exception(NFS_SERVER(dir),
3101 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3103 } while (exception.retry);
3107 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3108 struct nfs_fsstat *fsstat)
3110 struct nfs4_statfs_arg args = {
3112 .bitmask = server->attr_bitmask,
3114 struct nfs4_statfs_res res = {
3117 struct rpc_message msg = {
3118 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3123 nfs_fattr_init(fsstat->fattr);
3124 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3127 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3129 struct nfs4_exception exception = { };
3132 err = nfs4_handle_exception(server,
3133 _nfs4_proc_statfs(server, fhandle, fsstat),
3135 } while (exception.retry);
3139 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3140 struct nfs_fsinfo *fsinfo)
3142 struct nfs4_fsinfo_arg args = {
3144 .bitmask = server->attr_bitmask,
3146 struct nfs4_fsinfo_res res = {
3149 struct rpc_message msg = {
3150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3155 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3158 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3160 struct nfs4_exception exception = { };
3164 err = nfs4_handle_exception(server,
3165 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3167 } while (exception.retry);
3171 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3173 nfs_fattr_init(fsinfo->fattr);
3174 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3177 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3178 struct nfs_pathconf *pathconf)
3180 struct nfs4_pathconf_arg args = {
3182 .bitmask = server->attr_bitmask,
3184 struct nfs4_pathconf_res res = {
3185 .pathconf = pathconf,
3187 struct rpc_message msg = {
3188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3193 /* None of the pathconf attributes are mandatory to implement */
3194 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3195 memset(pathconf, 0, sizeof(*pathconf));
3199 nfs_fattr_init(pathconf->fattr);
3200 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3203 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3204 struct nfs_pathconf *pathconf)
3206 struct nfs4_exception exception = { };
3210 err = nfs4_handle_exception(server,
3211 _nfs4_proc_pathconf(server, fhandle, pathconf),
3213 } while (exception.retry);
3217 void __nfs4_read_done_cb(struct nfs_read_data *data)
3219 nfs_invalidate_atime(data->inode);
3222 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3224 struct nfs_server *server = NFS_SERVER(data->inode);
3226 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3227 rpc_restart_call_prepare(task);
3231 __nfs4_read_done_cb(data);
3232 if (task->tk_status > 0)
3233 renew_lease(server, data->timestamp);
3237 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3240 dprintk("--> %s\n", __func__);
3242 if (!nfs4_sequence_done(task, &data->res.seq_res))
3245 return data->read_done_cb ? data->read_done_cb(task, data) :
3246 nfs4_read_done_cb(task, data);
3249 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3251 data->timestamp = jiffies;
3252 data->read_done_cb = nfs4_read_done_cb;
3253 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3254 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3257 /* Reset the the nfs_read_data to send the read to the MDS. */
3258 void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3260 dprintk("%s Reset task for i/o through\n", __func__);
3261 put_lseg(data->lseg);
3263 /* offsets will differ in the dense stripe case */
3264 data->args.offset = data->mds_offset;
3265 data->ds_clp = NULL;
3266 data->args.fh = NFS_FH(data->inode);
3267 data->read_done_cb = nfs4_read_done_cb;
3268 task->tk_ops = data->mds_ops;
3269 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3271 EXPORT_SYMBOL_GPL(nfs4_reset_read);
3273 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3275 struct inode *inode = data->inode;
3277 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3278 rpc_restart_call_prepare(task);
3281 if (task->tk_status >= 0) {
3282 renew_lease(NFS_SERVER(inode), data->timestamp);
3283 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3288 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3290 if (!nfs4_sequence_done(task, &data->res.seq_res))
3292 return data->write_done_cb ? data->write_done_cb(task, data) :
3293 nfs4_write_done_cb(task, data);
3296 /* Reset the the nfs_write_data to send the write to the MDS. */
3297 void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3299 dprintk("%s Reset task for i/o through\n", __func__);
3300 put_lseg(data->lseg);
3302 data->ds_clp = NULL;
3303 data->write_done_cb = nfs4_write_done_cb;
3304 data->args.fh = NFS_FH(data->inode);
3305 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3306 data->args.offset = data->mds_offset;
3307 data->res.fattr = &data->fattr;
3308 task->tk_ops = data->mds_ops;
3309 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3311 EXPORT_SYMBOL_GPL(nfs4_reset_write);
3313 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3315 struct nfs_server *server = NFS_SERVER(data->inode);
3318 data->args.bitmask = NULL;
3319 data->res.fattr = NULL;
3321 data->args.bitmask = server->cache_consistency_bitmask;
3322 if (!data->write_done_cb)
3323 data->write_done_cb = nfs4_write_done_cb;
3324 data->res.server = server;
3325 data->timestamp = jiffies;
3327 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3328 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3331 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3333 struct inode *inode = data->inode;
3335 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3336 rpc_restart_call_prepare(task);
3339 nfs_refresh_inode(inode, data->res.fattr);
3343 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3345 if (!nfs4_sequence_done(task, &data->res.seq_res))
3347 return data->write_done_cb(task, data);
3350 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3352 struct nfs_server *server = NFS_SERVER(data->inode);
3355 data->args.bitmask = NULL;
3356 data->res.fattr = NULL;
3358 data->args.bitmask = server->cache_consistency_bitmask;
3359 if (!data->write_done_cb)
3360 data->write_done_cb = nfs4_commit_done_cb;
3361 data->res.server = server;
3362 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3363 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3366 struct nfs4_renewdata {
3367 struct nfs_client *client;
3368 unsigned long timestamp;
3372 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3373 * standalone procedure for queueing an asynchronous RENEW.
3375 static void nfs4_renew_release(void *calldata)
3377 struct nfs4_renewdata *data = calldata;
3378 struct nfs_client *clp = data->client;
3380 if (atomic_read(&clp->cl_count) > 1)
3381 nfs4_schedule_state_renewal(clp);
3382 nfs_put_client(clp);
3386 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3388 struct nfs4_renewdata *data = calldata;
3389 struct nfs_client *clp = data->client;
3390 unsigned long timestamp = data->timestamp;
3392 if (task->tk_status < 0) {
3393 /* Unless we're shutting down, schedule state recovery! */
3394 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3396 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3397 nfs4_schedule_lease_recovery(clp);
3400 nfs4_schedule_path_down_recovery(clp);
3402 do_renew_lease(clp, timestamp);
3405 static const struct rpc_call_ops nfs4_renew_ops = {
3406 .rpc_call_done = nfs4_renew_done,
3407 .rpc_release = nfs4_renew_release,
3410 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3412 struct rpc_message msg = {
3413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3417 struct nfs4_renewdata *data;
3419 if (renew_flags == 0)
3421 if (!atomic_inc_not_zero(&clp->cl_count))
3423 data = kmalloc(sizeof(*data), GFP_NOFS);
3427 data->timestamp = jiffies;
3428 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3429 &nfs4_renew_ops, data);
3432 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3434 struct rpc_message msg = {
3435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3439 unsigned long now = jiffies;
3442 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3445 do_renew_lease(clp, now);
3449 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3451 return (server->caps & NFS_CAP_ACLS)
3452 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3453 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3456 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3457 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3460 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3462 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3463 struct page **pages, unsigned int *pgbase)
3465 struct page *newpage, **spages;
3471 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3472 newpage = alloc_page(GFP_KERNEL);
3474 if (newpage == NULL)
3476 memcpy(page_address(newpage), buf, len);
3481 } while (buflen != 0);
3487 __free_page(spages[rc-1]);
3491 struct nfs4_cached_acl {
3497 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3499 struct nfs_inode *nfsi = NFS_I(inode);
3501 spin_lock(&inode->i_lock);
3502 kfree(nfsi->nfs4_acl);
3503 nfsi->nfs4_acl = acl;
3504 spin_unlock(&inode->i_lock);
3507 static void nfs4_zap_acl_attr(struct inode *inode)
3509 nfs4_set_cached_acl(inode, NULL);
3512 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3514 struct nfs_inode *nfsi = NFS_I(inode);
3515 struct nfs4_cached_acl *acl;
3518 spin_lock(&inode->i_lock);
3519 acl = nfsi->nfs4_acl;
3522 if (buf == NULL) /* user is just asking for length */
3524 if (acl->cached == 0)
3526 ret = -ERANGE; /* see getxattr(2) man page */
3527 if (acl->len > buflen)
3529 memcpy(buf, acl->data, acl->len);
3533 spin_unlock(&inode->i_lock);
3537 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3539 struct nfs4_cached_acl *acl;
3541 if (buf && acl_len <= PAGE_SIZE) {
3542 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3546 memcpy(acl->data, buf, acl_len);
3548 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3555 nfs4_set_cached_acl(inode, acl);
3559 * The getxattr API returns the required buffer length when called with a
3560 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3561 * the required buf. On a NULL buf, we send a page of data to the server
3562 * guessing that the ACL request can be serviced by a page. If so, we cache
3563 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3564 * the cache. If not so, we throw away the page, and cache the required
3565 * length. The next getxattr call will then produce another round trip to
3566 * the server, this time with the input buf of the required size.
3568 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3570 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3571 struct nfs_getaclargs args = {
3572 .fh = NFS_FH(inode),
3576 struct nfs_getaclres res = {
3580 struct rpc_message msg = {
3581 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3585 int ret = -ENOMEM, npages, i, acl_len = 0;
3587 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3588 /* As long as we're doing a round trip to the server anyway,
3589 * let's be prepared for a page of acl data. */
3593 for (i = 0; i < npages; i++) {
3594 pages[i] = alloc_page(GFP_KERNEL);
3599 /* for decoding across pages */
3600 args.acl_scratch = alloc_page(GFP_KERNEL);
3601 if (!args.acl_scratch)
3604 args.acl_len = npages * PAGE_SIZE;
3605 args.acl_pgbase = 0;
3606 /* Let decode_getfacl know not to fail if the ACL data is larger than
3607 * the page we send as a guess */
3609 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3610 resp_buf = page_address(pages[0]);
3612 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3613 __func__, buf, buflen, npages, args.acl_len);
3614 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3615 &msg, &args.seq_args, &res.seq_res, 0);
3619 acl_len = res.acl_len - res.acl_data_offset;
3620 if (acl_len > args.acl_len)
3621 nfs4_write_cached_acl(inode, NULL, acl_len);
3623 nfs4_write_cached_acl(inode, resp_buf + res.acl_data_offset,
3627 if (acl_len > buflen)
3629 _copy_from_pages(buf, pages, res.acl_data_offset,
3634 for (i = 0; i < npages; i++)
3636 __free_page(pages[i]);
3637 if (args.acl_scratch)
3638 __free_page(args.acl_scratch);
3642 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3644 struct nfs4_exception exception = { };
3647 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3650 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3651 } while (exception.retry);
3655 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3657 struct nfs_server *server = NFS_SERVER(inode);
3660 if (!nfs4_server_supports_acls(server))
3662 ret = nfs_revalidate_inode(server, inode);
3665 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3666 nfs_zap_acl_cache(inode);
3667 ret = nfs4_read_cached_acl(inode, buf, buflen);
3669 /* -ENOENT is returned if there is no ACL or if there is an ACL
3670 * but no cached acl data, just the acl length */
3672 return nfs4_get_acl_uncached(inode, buf, buflen);
3675 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3677 struct nfs_server *server = NFS_SERVER(inode);
3678 struct page *pages[NFS4ACL_MAXPAGES];
3679 struct nfs_setaclargs arg = {
3680 .fh = NFS_FH(inode),
3684 struct nfs_setaclres res;
3685 struct rpc_message msg = {
3686 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3692 if (!nfs4_server_supports_acls(server))
3694 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3697 nfs_inode_return_delegation(inode);
3698 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3701 * Free each page after tx, so the only ref left is
3702 * held by the network stack
3705 put_page(pages[i-1]);
3708 * Acl update can result in inode attribute update.
3709 * so mark the attribute cache invalid.
3711 spin_lock(&inode->i_lock);
3712 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3713 spin_unlock(&inode->i_lock);
3714 nfs_access_zap_cache(inode);
3715 nfs_zap_acl_cache(inode);
3719 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3721 struct nfs4_exception exception = { };
3724 err = nfs4_handle_exception(NFS_SERVER(inode),
3725 __nfs4_proc_set_acl(inode, buf, buflen),
3727 } while (exception.retry);
3732 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3734 struct nfs_client *clp = server->nfs_client;
3736 if (task->tk_status >= 0)
3738 switch(task->tk_status) {
3739 case -NFS4ERR_ADMIN_REVOKED:
3740 case -NFS4ERR_BAD_STATEID:
3741 case -NFS4ERR_OPENMODE:
3744 nfs4_schedule_stateid_recovery(server, state);
3745 goto wait_on_recovery;
3746 case -NFS4ERR_EXPIRED:
3748 nfs4_schedule_stateid_recovery(server, state);
3749 case -NFS4ERR_STALE_STATEID:
3750 case -NFS4ERR_STALE_CLIENTID:
3751 nfs4_schedule_lease_recovery(clp);
3752 goto wait_on_recovery;
3753 #if defined(CONFIG_NFS_V4_1)
3754 case -NFS4ERR_BADSESSION:
3755 case -NFS4ERR_BADSLOT:
3756 case -NFS4ERR_BAD_HIGH_SLOT:
3757 case -NFS4ERR_DEADSESSION:
3758 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3759 case -NFS4ERR_SEQ_FALSE_RETRY:
3760 case -NFS4ERR_SEQ_MISORDERED:
3761 dprintk("%s ERROR %d, Reset session\n", __func__,
3763 nfs4_schedule_session_recovery(clp->cl_session);
3764 task->tk_status = 0;
3766 #endif /* CONFIG_NFS_V4_1 */
3767 case -NFS4ERR_DELAY:
3768 nfs_inc_server_stats(server, NFSIOS_DELAY);
3769 case -NFS4ERR_GRACE:
3771 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3772 task->tk_status = 0;
3774 case -NFS4ERR_RETRY_UNCACHED_REP:
3775 case -NFS4ERR_OLD_STATEID:
3776 task->tk_status = 0;
3779 task->tk_status = nfs4_map_errors(task->tk_status);
3782 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3783 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3784 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3785 task->tk_status = 0;
3789 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3790 unsigned short port, struct rpc_cred *cred,
3791 struct nfs4_setclientid_res *res)
3793 nfs4_verifier sc_verifier;
3794 struct nfs4_setclientid setclientid = {
3795 .sc_verifier = &sc_verifier,
3797 .sc_cb_ident = clp->cl_cb_ident,
3799 struct rpc_message msg = {
3800 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3801 .rpc_argp = &setclientid,
3809 p = (__be32*)sc_verifier.data;
3810 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3811 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3814 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3815 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3817 rpc_peeraddr2str(clp->cl_rpcclient,
3819 rpc_peeraddr2str(clp->cl_rpcclient,
3821 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3822 clp->cl_id_uniquifier);
3823 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3824 sizeof(setclientid.sc_netid),
3825 rpc_peeraddr2str(clp->cl_rpcclient,
3826 RPC_DISPLAY_NETID));
3827 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3828 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3829 clp->cl_ipaddr, port >> 8, port & 255);
3831 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3832 if (status != -NFS4ERR_CLID_INUSE)
3835 ++clp->cl_id_uniquifier;
3839 ssleep(clp->cl_lease_time / HZ + 1);
3844 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3845 struct nfs4_setclientid_res *arg,
3846 struct rpc_cred *cred)
3848 struct nfs_fsinfo fsinfo;
3849 struct rpc_message msg = {
3850 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3852 .rpc_resp = &fsinfo,
3859 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3861 spin_lock(&clp->cl_lock);
3862 clp->cl_lease_time = fsinfo.lease_time * HZ;
3863 clp->cl_last_renewal = now;
3864 spin_unlock(&clp->cl_lock);
3869 struct nfs4_delegreturndata {
3870 struct nfs4_delegreturnargs args;
3871 struct nfs4_delegreturnres res;
3873 nfs4_stateid stateid;
3874 unsigned long timestamp;
3875 struct nfs_fattr fattr;
3879 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3881 struct nfs4_delegreturndata *data = calldata;
3883 if (!nfs4_sequence_done(task, &data->res.seq_res))
3886 switch (task->tk_status) {
3887 case -NFS4ERR_STALE_STATEID:
3888 case -NFS4ERR_EXPIRED:
3890 renew_lease(data->res.server, data->timestamp);
3893 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3895 rpc_restart_call_prepare(task);
3899 data->rpc_status = task->tk_status;
3902 static void nfs4_delegreturn_release(void *calldata)
3907 #if defined(CONFIG_NFS_V4_1)
3908 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3910 struct nfs4_delegreturndata *d_data;
3912 d_data = (struct nfs4_delegreturndata *)data;
3914 if (nfs4_setup_sequence(d_data->res.server,
3915 &d_data->args.seq_args,
3916 &d_data->res.seq_res, task))
3918 rpc_call_start(task);
3920 #endif /* CONFIG_NFS_V4_1 */
3922 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3923 #if defined(CONFIG_NFS_V4_1)
3924 .rpc_call_prepare = nfs4_delegreturn_prepare,
3925 #endif /* CONFIG_NFS_V4_1 */
3926 .rpc_call_done = nfs4_delegreturn_done,
3927 .rpc_release = nfs4_delegreturn_release,
3930 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3932 struct nfs4_delegreturndata *data;
3933 struct nfs_server *server = NFS_SERVER(inode);
3934 struct rpc_task *task;
3935 struct rpc_message msg = {
3936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3939 struct rpc_task_setup task_setup_data = {
3940 .rpc_client = server->client,
3941 .rpc_message = &msg,
3942 .callback_ops = &nfs4_delegreturn_ops,
3943 .flags = RPC_TASK_ASYNC,
3947 data = kzalloc(sizeof(*data), GFP_NOFS);
3950 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3951 data->args.fhandle = &data->fh;
3952 data->args.stateid = &data->stateid;
3953 data->args.bitmask = server->attr_bitmask;
3954 nfs_copy_fh(&data->fh, NFS_FH(inode));
3955 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3956 data->res.fattr = &data->fattr;
3957 data->res.server = server;
3958 nfs_fattr_init(data->res.fattr);
3959 data->timestamp = jiffies;
3960 data->rpc_status = 0;
3962 task_setup_data.callback_data = data;
3963 msg.rpc_argp = &data->args;
3964 msg.rpc_resp = &data->res;
3965 task = rpc_run_task(&task_setup_data);
3967 return PTR_ERR(task);
3970 status = nfs4_wait_for_completion_rpc_task(task);
3973 status = data->rpc_status;
3976 nfs_refresh_inode(inode, &data->fattr);
3982 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3984 struct nfs_server *server = NFS_SERVER(inode);
3985 struct nfs4_exception exception = { };
3988 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3990 case -NFS4ERR_STALE_STATEID:
3991 case -NFS4ERR_EXPIRED:
3995 err = nfs4_handle_exception(server, err, &exception);
3996 } while (exception.retry);
4000 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4001 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4004 * sleep, with exponential backoff, and retry the LOCK operation.
4006 static unsigned long
4007 nfs4_set_lock_task_retry(unsigned long timeout)
4009 freezable_schedule_timeout_killable(timeout);
4011 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4012 return NFS4_LOCK_MAXTIMEOUT;
4016 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4018 struct inode *inode = state->inode;
4019 struct nfs_server *server = NFS_SERVER(inode);
4020 struct nfs_client *clp = server->nfs_client;
4021 struct nfs_lockt_args arg = {
4022 .fh = NFS_FH(inode),
4025 struct nfs_lockt_res res = {
4028 struct rpc_message msg = {
4029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4032 .rpc_cred = state->owner->so_cred,
4034 struct nfs4_lock_state *lsp;
4037 arg.lock_owner.clientid = clp->cl_clientid;
4038 status = nfs4_set_lock_state(state, request);
4041 lsp = request->fl_u.nfs4_fl.owner;
4042 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4043 arg.lock_owner.s_dev = server->s_dev;
4044 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4047 request->fl_type = F_UNLCK;
4049 case -NFS4ERR_DENIED:
4052 request->fl_ops->fl_release_private(request);
4057 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4059 struct nfs4_exception exception = { };
4063 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4064 _nfs4_proc_getlk(state, cmd, request),
4066 } while (exception.retry);
4070 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4073 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4075 res = posix_lock_file_wait(file, fl);
4078 res = flock_lock_file_wait(file, fl);
4086 struct nfs4_unlockdata {
4087 struct nfs_locku_args arg;
4088 struct nfs_locku_res res;
4089 struct nfs4_lock_state *lsp;
4090 struct nfs_open_context *ctx;
4091 struct file_lock fl;
4092 const struct nfs_server *server;
4093 unsigned long timestamp;
4096 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4097 struct nfs_open_context *ctx,
4098 struct nfs4_lock_state *lsp,
4099 struct nfs_seqid *seqid)
4101 struct nfs4_unlockdata *p;
4102 struct inode *inode = lsp->ls_state->inode;
4104 p = kzalloc(sizeof(*p), GFP_NOFS);
4107 p->arg.fh = NFS_FH(inode);
4109 p->arg.seqid = seqid;
4110 p->res.seqid = seqid;
4111 p->arg.stateid = &lsp->ls_stateid;
4113 atomic_inc(&lsp->ls_count);
4114 /* Ensure we don't close file until we're done freeing locks! */
4115 p->ctx = get_nfs_open_context(ctx);
4116 memcpy(&p->fl, fl, sizeof(p->fl));
4117 p->server = NFS_SERVER(inode);
4121 static void nfs4_locku_release_calldata(void *data)
4123 struct nfs4_unlockdata *calldata = data;
4124 nfs_free_seqid(calldata->arg.seqid);
4125 nfs4_put_lock_state(calldata->lsp);
4126 put_nfs_open_context(calldata->ctx);
4130 static void nfs4_locku_done(struct rpc_task *task, void *data)
4132 struct nfs4_unlockdata *calldata = data;
4134 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4136 switch (task->tk_status) {
4138 memcpy(calldata->lsp->ls_stateid.data,
4139 calldata->res.stateid.data,
4140 sizeof(calldata->lsp->ls_stateid.data));
4141 renew_lease(calldata->server, calldata->timestamp);
4143 case -NFS4ERR_BAD_STATEID:
4144 case -NFS4ERR_OLD_STATEID:
4145 case -NFS4ERR_STALE_STATEID:
4146 case -NFS4ERR_EXPIRED:
4149 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4150 rpc_restart_call_prepare(task);
4154 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4156 struct nfs4_unlockdata *calldata = data;
4158 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4160 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4161 /* Note: exit _without_ running nfs4_locku_done */
4162 task->tk_action = NULL;
4165 calldata->timestamp = jiffies;
4166 if (nfs4_setup_sequence(calldata->server,
4167 &calldata->arg.seq_args,
4168 &calldata->res.seq_res, task))
4170 rpc_call_start(task);
4173 static const struct rpc_call_ops nfs4_locku_ops = {
4174 .rpc_call_prepare = nfs4_locku_prepare,
4175 .rpc_call_done = nfs4_locku_done,
4176 .rpc_release = nfs4_locku_release_calldata,
4179 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4180 struct nfs_open_context *ctx,
4181 struct nfs4_lock_state *lsp,
4182 struct nfs_seqid *seqid)
4184 struct nfs4_unlockdata *data;
4185 struct rpc_message msg = {
4186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4187 .rpc_cred = ctx->cred,
4189 struct rpc_task_setup task_setup_data = {
4190 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4191 .rpc_message = &msg,
4192 .callback_ops = &nfs4_locku_ops,
4193 .workqueue = nfsiod_workqueue,
4194 .flags = RPC_TASK_ASYNC,
4197 /* Ensure this is an unlock - when canceling a lock, the
4198 * canceled lock is passed in, and it won't be an unlock.
4200 fl->fl_type = F_UNLCK;
4202 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4204 nfs_free_seqid(seqid);
4205 return ERR_PTR(-ENOMEM);
4208 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4209 msg.rpc_argp = &data->arg;
4210 msg.rpc_resp = &data->res;
4211 task_setup_data.callback_data = data;
4212 return rpc_run_task(&task_setup_data);
4215 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4217 struct nfs_inode *nfsi = NFS_I(state->inode);
4218 struct nfs_seqid *seqid;
4219 struct nfs4_lock_state *lsp;
4220 struct rpc_task *task;
4222 unsigned char fl_flags = request->fl_flags;
4224 status = nfs4_set_lock_state(state, request);
4225 /* Unlock _before_ we do the RPC call */
4226 request->fl_flags |= FL_EXISTS;
4227 down_read(&nfsi->rwsem);
4228 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4229 up_read(&nfsi->rwsem);
4232 up_read(&nfsi->rwsem);
4235 /* Is this a delegated lock? */
4236 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4238 lsp = request->fl_u.nfs4_fl.owner;
4239 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4243 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4244 status = PTR_ERR(task);
4247 status = nfs4_wait_for_completion_rpc_task(task);
4250 request->fl_flags = fl_flags;
4254 struct nfs4_lockdata {
4255 struct nfs_lock_args arg;
4256 struct nfs_lock_res res;
4257 struct nfs4_lock_state *lsp;
4258 struct nfs_open_context *ctx;
4259 struct file_lock fl;
4260 unsigned long timestamp;
4263 struct nfs_server *server;
4266 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4267 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4270 struct nfs4_lockdata *p;
4271 struct inode *inode = lsp->ls_state->inode;
4272 struct nfs_server *server = NFS_SERVER(inode);
4274 p = kzalloc(sizeof(*p), gfp_mask);
4278 p->arg.fh = NFS_FH(inode);
4280 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4281 if (p->arg.open_seqid == NULL)
4283 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4284 if (p->arg.lock_seqid == NULL)
4285 goto out_free_seqid;
4286 p->arg.lock_stateid = &lsp->ls_stateid;
4287 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4288 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4289 p->arg.lock_owner.s_dev = server->s_dev;
4290 p->res.lock_seqid = p->arg.lock_seqid;
4293 atomic_inc(&lsp->ls_count);
4294 p->ctx = get_nfs_open_context(ctx);
4295 memcpy(&p->fl, fl, sizeof(p->fl));
4298 nfs_free_seqid(p->arg.open_seqid);
4304 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4306 struct nfs4_lockdata *data = calldata;
4307 struct nfs4_state *state = data->lsp->ls_state;
4309 dprintk("%s: begin!\n", __func__);
4310 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4312 /* Do we need to do an open_to_lock_owner? */
4313 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4314 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4316 data->arg.open_stateid = &state->stateid;
4317 data->arg.new_lock_owner = 1;
4318 data->res.open_seqid = data->arg.open_seqid;
4320 data->arg.new_lock_owner = 0;
4321 data->timestamp = jiffies;
4322 if (nfs4_setup_sequence(data->server,
4323 &data->arg.seq_args,
4324 &data->res.seq_res, task))
4326 rpc_call_start(task);
4327 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4330 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4332 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4333 nfs4_lock_prepare(task, calldata);
4336 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4338 struct nfs4_lockdata *data = calldata;
4340 dprintk("%s: begin!\n", __func__);
4342 if (!nfs4_sequence_done(task, &data->res.seq_res))
4345 data->rpc_status = task->tk_status;
4346 if (data->arg.new_lock_owner != 0) {
4347 if (data->rpc_status == 0)
4348 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4352 if (data->rpc_status == 0) {
4353 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4354 sizeof(data->lsp->ls_stateid.data));
4355 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4356 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4359 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4362 static void nfs4_lock_release(void *calldata)
4364 struct nfs4_lockdata *data = calldata;
4366 dprintk("%s: begin!\n", __func__);
4367 nfs_free_seqid(data->arg.open_seqid);
4368 if (data->cancelled != 0) {
4369 struct rpc_task *task;
4370 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4371 data->arg.lock_seqid);
4373 rpc_put_task_async(task);
4374 dprintk("%s: cancelling lock!\n", __func__);
4376 nfs_free_seqid(data->arg.lock_seqid);
4377 nfs4_put_lock_state(data->lsp);
4378 put_nfs_open_context(data->ctx);
4380 dprintk("%s: done!\n", __func__);
4383 static const struct rpc_call_ops nfs4_lock_ops = {
4384 .rpc_call_prepare = nfs4_lock_prepare,
4385 .rpc_call_done = nfs4_lock_done,
4386 .rpc_release = nfs4_lock_release,
4389 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4390 .rpc_call_prepare = nfs4_recover_lock_prepare,
4391 .rpc_call_done = nfs4_lock_done,
4392 .rpc_release = nfs4_lock_release,
4395 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4398 case -NFS4ERR_ADMIN_REVOKED:
4399 case -NFS4ERR_BAD_STATEID:
4400 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4401 if (new_lock_owner != 0 ||
4402 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4403 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4405 case -NFS4ERR_STALE_STATEID:
4406 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4407 case -NFS4ERR_EXPIRED:
4408 nfs4_schedule_lease_recovery(server->nfs_client);
4412 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4414 struct nfs4_lockdata *data;
4415 struct rpc_task *task;
4416 struct rpc_message msg = {
4417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4418 .rpc_cred = state->owner->so_cred,
4420 struct rpc_task_setup task_setup_data = {
4421 .rpc_client = NFS_CLIENT(state->inode),
4422 .rpc_message = &msg,
4423 .callback_ops = &nfs4_lock_ops,
4424 .workqueue = nfsiod_workqueue,
4425 .flags = RPC_TASK_ASYNC,
4429 dprintk("%s: begin!\n", __func__);
4430 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4431 fl->fl_u.nfs4_fl.owner,
4432 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4436 data->arg.block = 1;
4437 if (recovery_type > NFS_LOCK_NEW) {
4438 if (recovery_type == NFS_LOCK_RECLAIM)
4439 data->arg.reclaim = NFS_LOCK_RECLAIM;
4440 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4442 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4443 msg.rpc_argp = &data->arg;
4444 msg.rpc_resp = &data->res;
4445 task_setup_data.callback_data = data;
4446 task = rpc_run_task(&task_setup_data);
4448 return PTR_ERR(task);
4449 ret = nfs4_wait_for_completion_rpc_task(task);
4451 ret = data->rpc_status;
4453 nfs4_handle_setlk_error(data->server, data->lsp,
4454 data->arg.new_lock_owner, ret);
4456 data->cancelled = 1;
4458 dprintk("%s: done, ret = %d!\n", __func__, ret);
4462 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4464 struct nfs_server *server = NFS_SERVER(state->inode);
4465 struct nfs4_exception exception = { };
4469 /* Cache the lock if possible... */
4470 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4472 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4473 if (err != -NFS4ERR_DELAY)
4475 nfs4_handle_exception(server, err, &exception);
4476 } while (exception.retry);
4480 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4482 struct nfs_server *server = NFS_SERVER(state->inode);
4483 struct nfs4_exception exception = { };
4486 err = nfs4_set_lock_state(state, request);
4490 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4492 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4496 case -NFS4ERR_GRACE:
4497 case -NFS4ERR_DELAY:
4498 nfs4_handle_exception(server, err, &exception);
4501 } while (exception.retry);
4506 #if defined(CONFIG_NFS_V4_1)
4507 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4510 struct nfs_server *server = NFS_SERVER(state->inode);
4512 status = nfs41_test_stateid(server, state);
4513 if (status == NFS_OK)
4515 nfs41_free_stateid(server, state);
4516 return nfs4_lock_expired(state, request);
4520 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4522 struct nfs_inode *nfsi = NFS_I(state->inode);
4523 unsigned char fl_flags = request->fl_flags;
4524 int status = -ENOLCK;
4526 if ((fl_flags & FL_POSIX) &&
4527 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4529 /* Is this a delegated open? */
4530 status = nfs4_set_lock_state(state, request);
4533 request->fl_flags |= FL_ACCESS;
4534 status = do_vfs_lock(request->fl_file, request);
4537 down_read(&nfsi->rwsem);
4538 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4539 /* Yes: cache locks! */
4540 /* ...but avoid races with delegation recall... */
4541 request->fl_flags = fl_flags & ~FL_SLEEP;
4542 status = do_vfs_lock(request->fl_file, request);
4545 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4548 /* Note: we always want to sleep here! */
4549 request->fl_flags = fl_flags | FL_SLEEP;
4550 if (do_vfs_lock(request->fl_file, request) < 0)
4551 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4553 up_read(&nfsi->rwsem);
4555 request->fl_flags = fl_flags;
4559 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4561 struct nfs4_exception exception = { };
4565 err = _nfs4_proc_setlk(state, cmd, request);
4566 if (err == -NFS4ERR_DENIED)
4568 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4570 } while (exception.retry);
4575 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4577 struct nfs_open_context *ctx;
4578 struct nfs4_state *state;
4579 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4582 /* verify open state */
4583 ctx = nfs_file_open_context(filp);
4586 if (request->fl_start < 0 || request->fl_end < 0)
4589 if (IS_GETLK(cmd)) {
4591 return nfs4_proc_getlk(state, F_GETLK, request);
4595 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4598 if (request->fl_type == F_UNLCK) {
4600 return nfs4_proc_unlck(state, cmd, request);
4607 status = nfs4_proc_setlk(state, cmd, request);
4608 if ((status != -EAGAIN) || IS_SETLK(cmd))
4610 timeout = nfs4_set_lock_task_retry(timeout);
4611 status = -ERESTARTSYS;
4614 } while(status < 0);
4618 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4620 struct nfs_server *server = NFS_SERVER(state->inode);
4621 struct nfs4_exception exception = { };
4624 err = nfs4_set_lock_state(state, fl);
4628 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4631 printk(KERN_ERR "%s: unhandled error %d.\n",
4636 case -NFS4ERR_EXPIRED:
4637 nfs4_schedule_stateid_recovery(server, state);
4638 case -NFS4ERR_STALE_CLIENTID:
4639 case -NFS4ERR_STALE_STATEID:
4640 nfs4_schedule_lease_recovery(server->nfs_client);
4642 case -NFS4ERR_BADSESSION:
4643 case -NFS4ERR_BADSLOT:
4644 case -NFS4ERR_BAD_HIGH_SLOT:
4645 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4646 case -NFS4ERR_DEADSESSION:
4647 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4651 * The show must go on: exit, but mark the
4652 * stateid as needing recovery.
4654 case -NFS4ERR_ADMIN_REVOKED:
4655 case -NFS4ERR_BAD_STATEID:
4656 case -NFS4ERR_OPENMODE:
4657 nfs4_schedule_stateid_recovery(server, state);
4662 * User RPCSEC_GSS context has expired.
4663 * We cannot recover this stateid now, so
4664 * skip it and allow recovery thread to
4670 case -NFS4ERR_DENIED:
4671 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4674 case -NFS4ERR_DELAY:
4677 err = nfs4_handle_exception(server, err, &exception);
4678 } while (exception.retry);
4683 static void nfs4_release_lockowner_release(void *calldata)
4688 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4689 .rpc_release = nfs4_release_lockowner_release,
4692 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4694 struct nfs_server *server = lsp->ls_state->owner->so_server;
4695 struct nfs_release_lockowner_args *args;
4696 struct rpc_message msg = {
4697 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4700 if (server->nfs_client->cl_mvops->minor_version != 0)
4702 args = kmalloc(sizeof(*args), GFP_NOFS);
4705 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4706 args->lock_owner.id = lsp->ls_seqid.owner_id;
4707 args->lock_owner.s_dev = server->s_dev;
4708 msg.rpc_argp = args;
4709 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4712 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4714 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4715 const void *buf, size_t buflen,
4716 int flags, int type)
4718 if (strcmp(key, "") != 0)
4721 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4724 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4725 void *buf, size_t buflen, int type)
4727 if (strcmp(key, "") != 0)
4730 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4733 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4734 size_t list_len, const char *name,
4735 size_t name_len, int type)
4737 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4739 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4742 if (list && len <= list_len)
4743 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4748 * nfs_fhget will use either the mounted_on_fileid or the fileid
4750 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4752 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4753 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4754 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4755 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4758 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4759 NFS_ATTR_FATTR_NLINK;
4760 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4764 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4765 struct nfs4_fs_locations *fs_locations, struct page *page)
4767 struct nfs_server *server = NFS_SERVER(dir);
4769 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4771 struct nfs4_fs_locations_arg args = {
4772 .dir_fh = NFS_FH(dir),
4777 struct nfs4_fs_locations_res res = {
4778 .fs_locations = fs_locations,
4780 struct rpc_message msg = {
4781 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4787 dprintk("%s: start\n", __func__);
4789 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4790 * is not supported */
4791 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4792 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4794 bitmask[0] |= FATTR4_WORD0_FILEID;
4796 nfs_fattr_init(&fs_locations->fattr);
4797 fs_locations->server = server;
4798 fs_locations->nlocations = 0;
4799 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4800 dprintk("%s: returned status = %d\n", __func__, status);
4804 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4807 struct nfs4_secinfo_arg args = {
4808 .dir_fh = NFS_FH(dir),
4811 struct nfs4_secinfo_res res = {
4814 struct rpc_message msg = {
4815 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4820 dprintk("NFS call secinfo %s\n", name->name);
4821 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4822 dprintk("NFS reply secinfo: %d\n", status);
4826 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4828 struct nfs4_exception exception = { };
4831 err = nfs4_handle_exception(NFS_SERVER(dir),
4832 _nfs4_proc_secinfo(dir, name, flavors),
4834 } while (exception.retry);
4838 #ifdef CONFIG_NFS_V4_1
4840 * Check the exchange flags returned by the server for invalid flags, having
4841 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4844 static int nfs4_check_cl_exchange_flags(u32 flags)
4846 if (flags & ~EXCHGID4_FLAG_MASK_R)
4848 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4849 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4851 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4855 return -NFS4ERR_INVAL;
4859 nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4861 if (a->server_scope_sz == b->server_scope_sz &&
4862 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4869 * nfs4_proc_exchange_id()
4871 * Since the clientid has expired, all compounds using sessions
4872 * associated with the stale clientid will be returning
4873 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4874 * be in some phase of session reset.
4876 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4878 nfs4_verifier verifier;
4879 struct nfs41_exchange_id_args args = {
4881 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4883 struct nfs41_exchange_id_res res = {
4887 struct rpc_message msg = {
4888 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4895 dprintk("--> %s\n", __func__);
4896 BUG_ON(clp == NULL);
4898 p = (u32 *)verifier.data;
4899 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4900 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4901 args.verifier = &verifier;
4903 args.id_len = scnprintf(args.id, sizeof(args.id),
4906 init_utsname()->nodename,
4907 init_utsname()->domainname,
4908 clp->cl_rpcclient->cl_auth->au_flavor);
4910 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4911 if (unlikely(!res.server_scope))
4914 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4916 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4919 if (clp->server_scope &&
4920 !nfs41_same_server_scope(clp->server_scope,
4921 res.server_scope)) {
4922 dprintk("%s: server_scope mismatch detected\n",
4924 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4925 kfree(clp->server_scope);
4926 clp->server_scope = NULL;
4929 if (!clp->server_scope)
4930 clp->server_scope = res.server_scope;
4932 kfree(res.server_scope);
4935 dprintk("<-- %s status= %d\n", __func__, status);
4939 struct nfs4_get_lease_time_data {
4940 struct nfs4_get_lease_time_args *args;
4941 struct nfs4_get_lease_time_res *res;
4942 struct nfs_client *clp;
4945 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4949 struct nfs4_get_lease_time_data *data =
4950 (struct nfs4_get_lease_time_data *)calldata;
4952 dprintk("--> %s\n", __func__);
4953 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4954 /* just setup sequence, do not trigger session recovery
4955 since we're invoked within one */
4956 ret = nfs41_setup_sequence(data->clp->cl_session,
4957 &data->args->la_seq_args,
4958 &data->res->lr_seq_res, task);
4960 BUG_ON(ret == -EAGAIN);
4961 rpc_call_start(task);
4962 dprintk("<-- %s\n", __func__);
4966 * Called from nfs4_state_manager thread for session setup, so don't recover
4967 * from sequence operation or clientid errors.
4969 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4971 struct nfs4_get_lease_time_data *data =
4972 (struct nfs4_get_lease_time_data *)calldata;
4974 dprintk("--> %s\n", __func__);
4975 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4977 switch (task->tk_status) {
4978 case -NFS4ERR_DELAY:
4979 case -NFS4ERR_GRACE:
4980 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4981 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4982 task->tk_status = 0;
4984 case -NFS4ERR_RETRY_UNCACHED_REP:
4985 rpc_restart_call_prepare(task);
4988 dprintk("<-- %s\n", __func__);
4991 struct rpc_call_ops nfs4_get_lease_time_ops = {
4992 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4993 .rpc_call_done = nfs4_get_lease_time_done,
4996 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4998 struct rpc_task *task;
4999 struct nfs4_get_lease_time_args args;
5000 struct nfs4_get_lease_time_res res = {
5001 .lr_fsinfo = fsinfo,
5003 struct nfs4_get_lease_time_data data = {
5008 struct rpc_message msg = {
5009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5013 struct rpc_task_setup task_setup = {
5014 .rpc_client = clp->cl_rpcclient,
5015 .rpc_message = &msg,
5016 .callback_ops = &nfs4_get_lease_time_ops,
5017 .callback_data = &data,
5018 .flags = RPC_TASK_TIMEOUT,
5022 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5023 dprintk("--> %s\n", __func__);
5024 task = rpc_run_task(&task_setup);
5027 status = PTR_ERR(task);
5029 status = task->tk_status;
5032 dprintk("<-- %s return %d\n", __func__, status);
5038 * Reset a slot table
5040 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5043 struct nfs4_slot *new = NULL;
5047 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5048 max_reqs, tbl->max_slots);
5050 /* Does the newly negotiated max_reqs match the existing slot table? */
5051 if (max_reqs != tbl->max_slots) {
5053 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
5060 spin_lock(&tbl->slot_tbl_lock);
5063 tbl->max_slots = max_reqs;
5065 for (i = 0; i < tbl->max_slots; ++i)
5066 tbl->slots[i].seq_nr = ivalue;
5067 spin_unlock(&tbl->slot_tbl_lock);
5068 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5069 tbl, tbl->slots, tbl->max_slots);
5071 dprintk("<-- %s: return %d\n", __func__, ret);
5075 /* Destroy the slot table */
5076 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5078 if (session->fc_slot_table.slots != NULL) {
5079 kfree(session->fc_slot_table.slots);
5080 session->fc_slot_table.slots = NULL;
5082 if (session->bc_slot_table.slots != NULL) {
5083 kfree(session->bc_slot_table.slots);
5084 session->bc_slot_table.slots = NULL;
5090 * Initialize slot table
5092 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5093 int max_slots, int ivalue)
5095 struct nfs4_slot *slot;
5098 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5100 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
5102 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
5107 spin_lock(&tbl->slot_tbl_lock);
5108 tbl->max_slots = max_slots;
5110 tbl->highest_used_slotid = -1; /* no slot is currently used */
5111 spin_unlock(&tbl->slot_tbl_lock);
5112 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5113 tbl, tbl->slots, tbl->max_slots);
5115 dprintk("<-- %s: return %d\n", __func__, ret);
5120 * Initialize or reset the forechannel and backchannel tables
5122 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5124 struct nfs4_slot_table *tbl;
5127 dprintk("--> %s\n", __func__);
5129 tbl = &ses->fc_slot_table;
5130 if (tbl->slots == NULL) {
5131 status = nfs4_init_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5132 if (status) /* -ENOMEM */
5135 status = nfs4_reset_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5140 tbl = &ses->bc_slot_table;
5141 if (tbl->slots == NULL) {
5142 status = nfs4_init_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5144 /* Fore and back channel share a connection so get
5145 * both slot tables or neither */
5146 nfs4_destroy_slot_tables(ses);
5148 status = nfs4_reset_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5152 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5154 struct nfs4_session *session;
5155 struct nfs4_slot_table *tbl;
5157 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5161 tbl = &session->fc_slot_table;
5162 tbl->highest_used_slotid = -1;
5163 spin_lock_init(&tbl->slot_tbl_lock);
5164 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5165 init_completion(&tbl->complete);
5167 tbl = &session->bc_slot_table;
5168 tbl->highest_used_slotid = -1;
5169 spin_lock_init(&tbl->slot_tbl_lock);
5170 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5171 init_completion(&tbl->complete);
5173 session->session_state = 1<<NFS4_SESSION_INITING;
5179 void nfs4_destroy_session(struct nfs4_session *session)
5181 nfs4_proc_destroy_session(session);
5182 dprintk("%s Destroy backchannel for xprt %p\n",
5183 __func__, session->clp->cl_rpcclient->cl_xprt);
5184 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5185 NFS41_BC_MIN_CALLBACKS);
5186 nfs4_destroy_slot_tables(session);
5191 * Initialize the values to be used by the client in CREATE_SESSION
5192 * If nfs4_init_session set the fore channel request and response sizes,
5195 * Set the back channel max_resp_sz_cached to zero to force the client to
5196 * always set csa_cachethis to FALSE because the current implementation
5197 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5199 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5201 struct nfs4_session *session = args->client->cl_session;
5202 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5203 mxresp_sz = session->fc_attrs.max_resp_sz;
5206 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5208 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5209 /* Fore channel attributes */
5210 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5211 args->fc_attrs.max_resp_sz = mxresp_sz;
5212 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5213 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5215 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5216 "max_ops=%u max_reqs=%u\n",
5218 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5219 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5221 /* Back channel attributes */
5222 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5223 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5224 args->bc_attrs.max_resp_sz_cached = 0;
5225 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5226 args->bc_attrs.max_reqs = 1;
5228 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5229 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5231 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5232 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5233 args->bc_attrs.max_reqs);
5236 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5238 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5239 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5241 if (rcvd->max_resp_sz > sent->max_resp_sz)
5244 * Our requested max_ops is the minimum we need; we're not
5245 * prepared to break up compounds into smaller pieces than that.
5246 * So, no point even trying to continue if the server won't
5249 if (rcvd->max_ops < sent->max_ops)
5251 if (rcvd->max_reqs == 0)
5256 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5258 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5259 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5261 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5263 if (rcvd->max_resp_sz < sent->max_resp_sz)
5265 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5267 /* These would render the backchannel useless: */
5268 if (rcvd->max_ops == 0)
5270 if (rcvd->max_reqs == 0)
5275 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5276 struct nfs4_session *session)
5280 ret = nfs4_verify_fore_channel_attrs(args, session);
5283 return nfs4_verify_back_channel_attrs(args, session);
5286 static int _nfs4_proc_create_session(struct nfs_client *clp)
5288 struct nfs4_session *session = clp->cl_session;
5289 struct nfs41_create_session_args args = {
5291 .cb_program = NFS4_CALLBACK,
5293 struct nfs41_create_session_res res = {
5296 struct rpc_message msg = {
5297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5303 nfs4_init_channel_attrs(&args);
5304 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5306 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5309 /* Verify the session's negotiated channel_attrs values */
5310 status = nfs4_verify_channel_attrs(&args, session);
5312 /* Increment the clientid slot sequence id */
5320 * Issues a CREATE_SESSION operation to the server.
5321 * It is the responsibility of the caller to verify the session is
5322 * expired before calling this routine.
5324 int nfs4_proc_create_session(struct nfs_client *clp)
5328 struct nfs4_session *session = clp->cl_session;
5330 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5332 status = _nfs4_proc_create_session(clp);
5336 /* Init or reset the session slot tables */
5337 status = nfs4_setup_session_slot_tables(session);
5338 dprintk("slot table setup returned %d\n", status);
5342 ptr = (unsigned *)&session->sess_id.data[0];
5343 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5344 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5346 dprintk("<-- %s\n", __func__);
5351 * Issue the over-the-wire RPC DESTROY_SESSION.
5352 * The caller must serialize access to this routine.
5354 int nfs4_proc_destroy_session(struct nfs4_session *session)
5357 struct rpc_message msg;
5359 dprintk("--> nfs4_proc_destroy_session\n");
5361 /* session is still being setup */
5362 if (session->clp->cl_cons_state != NFS_CS_READY)
5365 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5366 msg.rpc_argp = session;
5367 msg.rpc_resp = NULL;
5368 msg.rpc_cred = NULL;
5369 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5373 "Got error %d from the server on DESTROY_SESSION. "
5374 "Session has been destroyed regardless...\n", status);
5376 dprintk("<-- nfs4_proc_destroy_session\n");
5380 int nfs4_init_session(struct nfs_server *server)
5382 struct nfs_client *clp = server->nfs_client;
5383 struct nfs4_session *session;
5384 unsigned int rsize, wsize;
5387 if (!nfs4_has_session(clp))
5390 session = clp->cl_session;
5391 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5394 rsize = server->rsize;
5396 rsize = NFS_MAX_FILE_IO_SIZE;
5397 wsize = server->wsize;
5399 wsize = NFS_MAX_FILE_IO_SIZE;
5401 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5402 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5404 ret = nfs4_recover_expired_lease(server);
5406 ret = nfs4_check_client_ready(clp);
5410 int nfs4_init_ds_session(struct nfs_client *clp)
5412 struct nfs4_session *session = clp->cl_session;
5415 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5418 ret = nfs4_client_recover_expired_lease(clp);
5420 /* Test for the DS role */
5421 if (!is_ds_client(clp))
5424 ret = nfs4_check_client_ready(clp);
5428 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5432 * Renew the cl_session lease.
5434 struct nfs4_sequence_data {
5435 struct nfs_client *clp;
5436 struct nfs4_sequence_args args;
5437 struct nfs4_sequence_res res;
5440 static void nfs41_sequence_release(void *data)
5442 struct nfs4_sequence_data *calldata = data;
5443 struct nfs_client *clp = calldata->clp;
5445 if (atomic_read(&clp->cl_count) > 1)
5446 nfs4_schedule_state_renewal(clp);
5447 nfs_put_client(clp);
5451 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5453 switch(task->tk_status) {
5454 case -NFS4ERR_DELAY:
5455 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5458 nfs4_schedule_lease_recovery(clp);
5463 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5465 struct nfs4_sequence_data *calldata = data;
5466 struct nfs_client *clp = calldata->clp;
5468 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5471 if (task->tk_status < 0) {
5472 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5473 if (atomic_read(&clp->cl_count) == 1)
5476 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5477 rpc_restart_call_prepare(task);
5481 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5483 dprintk("<-- %s\n", __func__);
5486 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5488 struct nfs4_sequence_data *calldata = data;
5489 struct nfs_client *clp = calldata->clp;
5490 struct nfs4_sequence_args *args;
5491 struct nfs4_sequence_res *res;
5493 args = task->tk_msg.rpc_argp;
5494 res = task->tk_msg.rpc_resp;
5496 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5498 rpc_call_start(task);
5501 static const struct rpc_call_ops nfs41_sequence_ops = {
5502 .rpc_call_done = nfs41_sequence_call_done,
5503 .rpc_call_prepare = nfs41_sequence_prepare,
5504 .rpc_release = nfs41_sequence_release,
5507 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5509 struct nfs4_sequence_data *calldata;
5510 struct rpc_message msg = {
5511 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5514 struct rpc_task_setup task_setup_data = {
5515 .rpc_client = clp->cl_rpcclient,
5516 .rpc_message = &msg,
5517 .callback_ops = &nfs41_sequence_ops,
5518 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5521 if (!atomic_inc_not_zero(&clp->cl_count))
5522 return ERR_PTR(-EIO);
5523 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5524 if (calldata == NULL) {
5525 nfs_put_client(clp);
5526 return ERR_PTR(-ENOMEM);
5528 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5529 msg.rpc_argp = &calldata->args;
5530 msg.rpc_resp = &calldata->res;
5531 calldata->clp = clp;
5532 task_setup_data.callback_data = calldata;
5534 return rpc_run_task(&task_setup_data);
5537 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5539 struct rpc_task *task;
5542 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5544 task = _nfs41_proc_sequence(clp, cred);
5546 ret = PTR_ERR(task);
5548 rpc_put_task_async(task);
5549 dprintk("<-- %s status=%d\n", __func__, ret);
5553 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5555 struct rpc_task *task;
5558 task = _nfs41_proc_sequence(clp, cred);
5560 ret = PTR_ERR(task);
5563 ret = rpc_wait_for_completion_task(task);
5565 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5567 if (task->tk_status == 0)
5568 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5569 ret = task->tk_status;
5573 dprintk("<-- %s status=%d\n", __func__, ret);
5577 struct nfs4_reclaim_complete_data {
5578 struct nfs_client *clp;
5579 struct nfs41_reclaim_complete_args arg;
5580 struct nfs41_reclaim_complete_res res;
5583 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5585 struct nfs4_reclaim_complete_data *calldata = data;
5587 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5588 if (nfs41_setup_sequence(calldata->clp->cl_session,
5589 &calldata->arg.seq_args,
5590 &calldata->res.seq_res, task))
5593 rpc_call_start(task);
5596 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5598 switch(task->tk_status) {
5600 case -NFS4ERR_COMPLETE_ALREADY:
5601 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5603 case -NFS4ERR_DELAY:
5604 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5606 case -NFS4ERR_RETRY_UNCACHED_REP:
5609 nfs4_schedule_lease_recovery(clp);
5614 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5616 struct nfs4_reclaim_complete_data *calldata = data;
5617 struct nfs_client *clp = calldata->clp;
5618 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5620 dprintk("--> %s\n", __func__);
5621 if (!nfs41_sequence_done(task, res))
5624 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5625 rpc_restart_call_prepare(task);
5628 dprintk("<-- %s\n", __func__);
5631 static void nfs4_free_reclaim_complete_data(void *data)
5633 struct nfs4_reclaim_complete_data *calldata = data;
5638 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5639 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5640 .rpc_call_done = nfs4_reclaim_complete_done,
5641 .rpc_release = nfs4_free_reclaim_complete_data,
5645 * Issue a global reclaim complete.
5647 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5649 struct nfs4_reclaim_complete_data *calldata;
5650 struct rpc_task *task;
5651 struct rpc_message msg = {
5652 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5654 struct rpc_task_setup task_setup_data = {
5655 .rpc_client = clp->cl_rpcclient,
5656 .rpc_message = &msg,
5657 .callback_ops = &nfs4_reclaim_complete_call_ops,
5658 .flags = RPC_TASK_ASYNC,
5660 int status = -ENOMEM;
5662 dprintk("--> %s\n", __func__);
5663 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5664 if (calldata == NULL)
5666 calldata->clp = clp;
5667 calldata->arg.one_fs = 0;
5669 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
5670 msg.rpc_argp = &calldata->arg;
5671 msg.rpc_resp = &calldata->res;
5672 task_setup_data.callback_data = calldata;
5673 task = rpc_run_task(&task_setup_data);
5675 status = PTR_ERR(task);
5678 status = nfs4_wait_for_completion_rpc_task(task);
5680 status = task->tk_status;
5684 dprintk("<-- %s status=%d\n", __func__, status);
5689 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5691 struct nfs4_layoutget *lgp = calldata;
5692 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5694 dprintk("--> %s\n", __func__);
5695 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5696 * right now covering the LAYOUTGET we are about to send.
5697 * However, that is not so catastrophic, and there seems
5698 * to be no way to prevent it completely.
5700 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5701 &lgp->res.seq_res, task))
5703 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5704 NFS_I(lgp->args.inode)->layout,
5705 lgp->args.ctx->state)) {
5706 rpc_exit(task, NFS4_OK);
5709 rpc_call_start(task);
5712 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5714 struct nfs4_layoutget *lgp = calldata;
5715 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5717 dprintk("--> %s\n", __func__);
5719 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5722 switch (task->tk_status) {
5725 case -NFS4ERR_LAYOUTTRYLATER:
5726 case -NFS4ERR_RECALLCONFLICT:
5727 task->tk_status = -NFS4ERR_DELAY;
5730 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5731 rpc_restart_call_prepare(task);
5735 dprintk("<-- %s\n", __func__);
5738 static void nfs4_layoutget_release(void *calldata)
5740 struct nfs4_layoutget *lgp = calldata;
5742 dprintk("--> %s\n", __func__);
5743 put_nfs_open_context(lgp->args.ctx);
5745 dprintk("<-- %s\n", __func__);
5748 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5749 .rpc_call_prepare = nfs4_layoutget_prepare,
5750 .rpc_call_done = nfs4_layoutget_done,
5751 .rpc_release = nfs4_layoutget_release,
5754 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5756 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5757 struct rpc_task *task;
5758 struct rpc_message msg = {
5759 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5760 .rpc_argp = &lgp->args,
5761 .rpc_resp = &lgp->res,
5763 struct rpc_task_setup task_setup_data = {
5764 .rpc_client = server->client,
5765 .rpc_message = &msg,
5766 .callback_ops = &nfs4_layoutget_call_ops,
5767 .callback_data = lgp,
5768 .flags = RPC_TASK_ASYNC,
5772 dprintk("--> %s\n", __func__);
5774 lgp->res.layoutp = &lgp->args.layout;
5775 lgp->res.seq_res.sr_slot = NULL;
5776 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
5777 task = rpc_run_task(&task_setup_data);
5779 return PTR_ERR(task);
5780 status = nfs4_wait_for_completion_rpc_task(task);
5782 status = task->tk_status;
5784 status = pnfs_layout_process(lgp);
5786 dprintk("<-- %s status=%d\n", __func__, status);
5791 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5793 struct nfs4_layoutreturn *lrp = calldata;
5795 dprintk("--> %s\n", __func__);
5796 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5797 &lrp->res.seq_res, task))
5799 rpc_call_start(task);
5802 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5804 struct nfs4_layoutreturn *lrp = calldata;
5805 struct nfs_server *server;
5806 struct pnfs_layout_hdr *lo = lrp->args.layout;
5808 dprintk("--> %s\n", __func__);
5810 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5813 server = NFS_SERVER(lrp->args.inode);
5814 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5815 rpc_restart_call_prepare(task);
5818 spin_lock(&lo->plh_inode->i_lock);
5819 if (task->tk_status == 0) {
5820 if (lrp->res.lrs_present) {
5821 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5823 BUG_ON(!list_empty(&lo->plh_segs));
5825 lo->plh_block_lgets--;
5826 spin_unlock(&lo->plh_inode->i_lock);
5827 dprintk("<-- %s\n", __func__);
5830 static void nfs4_layoutreturn_release(void *calldata)
5832 struct nfs4_layoutreturn *lrp = calldata;
5834 dprintk("--> %s\n", __func__);
5835 put_layout_hdr(lrp->args.layout);
5837 dprintk("<-- %s\n", __func__);
5840 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5841 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5842 .rpc_call_done = nfs4_layoutreturn_done,
5843 .rpc_release = nfs4_layoutreturn_release,
5846 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5848 struct rpc_task *task;
5849 struct rpc_message msg = {
5850 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5851 .rpc_argp = &lrp->args,
5852 .rpc_resp = &lrp->res,
5854 struct rpc_task_setup task_setup_data = {
5855 .rpc_client = lrp->clp->cl_rpcclient,
5856 .rpc_message = &msg,
5857 .callback_ops = &nfs4_layoutreturn_call_ops,
5858 .callback_data = lrp,
5862 dprintk("--> %s\n", __func__);
5863 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
5864 task = rpc_run_task(&task_setup_data);
5866 return PTR_ERR(task);
5867 status = task->tk_status;
5868 dprintk("<-- %s status=%d\n", __func__, status);
5874 * Retrieve the list of Data Server devices from the MDS.
5876 static int _nfs4_getdevicelist(struct nfs_server *server,
5877 const struct nfs_fh *fh,
5878 struct pnfs_devicelist *devlist)
5880 struct nfs4_getdevicelist_args args = {
5882 .layoutclass = server->pnfs_curr_ld->id,
5884 struct nfs4_getdevicelist_res res = {
5887 struct rpc_message msg = {
5888 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
5894 dprintk("--> %s\n", __func__);
5895 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
5897 dprintk("<-- %s status=%d\n", __func__, status);
5901 int nfs4_proc_getdevicelist(struct nfs_server *server,
5902 const struct nfs_fh *fh,
5903 struct pnfs_devicelist *devlist)
5905 struct nfs4_exception exception = { };
5909 err = nfs4_handle_exception(server,
5910 _nfs4_getdevicelist(server, fh, devlist),
5912 } while (exception.retry);
5914 dprintk("%s: err=%d, num_devs=%u\n", __func__,
5915 err, devlist->num_devs);
5919 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
5922 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5924 struct nfs4_getdeviceinfo_args args = {
5927 struct nfs4_getdeviceinfo_res res = {
5930 struct rpc_message msg = {
5931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5937 dprintk("--> %s\n", __func__);
5938 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
5939 dprintk("<-- %s status=%d\n", __func__, status);
5944 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5946 struct nfs4_exception exception = { };
5950 err = nfs4_handle_exception(server,
5951 _nfs4_proc_getdeviceinfo(server, pdev),
5953 } while (exception.retry);
5956 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5958 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
5960 struct nfs4_layoutcommit_data *data = calldata;
5961 struct nfs_server *server = NFS_SERVER(data->args.inode);
5963 if (nfs4_setup_sequence(server, &data->args.seq_args,
5964 &data->res.seq_res, task))
5966 rpc_call_start(task);
5970 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
5972 struct nfs4_layoutcommit_data *data = calldata;
5973 struct nfs_server *server = NFS_SERVER(data->args.inode);
5975 if (!nfs4_sequence_done(task, &data->res.seq_res))
5978 switch (task->tk_status) { /* Just ignore these failures */
5979 case NFS4ERR_DELEG_REVOKED: /* layout was recalled */
5980 case NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
5981 case NFS4ERR_BADLAYOUT: /* no layout */
5982 case NFS4ERR_GRACE: /* loca_recalim always false */
5983 task->tk_status = 0;
5986 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5987 rpc_restart_call_prepare(task);
5991 if (task->tk_status == 0)
5992 nfs_post_op_update_inode_force_wcc(data->args.inode,
5996 static void nfs4_layoutcommit_release(void *calldata)
5998 struct nfs4_layoutcommit_data *data = calldata;
5999 struct pnfs_layout_segment *lseg, *tmp;
6000 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6002 pnfs_cleanup_layoutcommit(data);
6003 /* Matched by references in pnfs_set_layoutcommit */
6004 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6005 list_del_init(&lseg->pls_lc_list);
6006 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6011 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6012 smp_mb__after_clear_bit();
6013 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6015 put_rpccred(data->cred);
6019 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6020 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6021 .rpc_call_done = nfs4_layoutcommit_done,
6022 .rpc_release = nfs4_layoutcommit_release,
6026 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6028 struct rpc_message msg = {
6029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6030 .rpc_argp = &data->args,
6031 .rpc_resp = &data->res,
6032 .rpc_cred = data->cred,
6034 struct rpc_task_setup task_setup_data = {
6035 .task = &data->task,
6036 .rpc_client = NFS_CLIENT(data->args.inode),
6037 .rpc_message = &msg,
6038 .callback_ops = &nfs4_layoutcommit_ops,
6039 .callback_data = data,
6040 .flags = RPC_TASK_ASYNC,
6042 struct rpc_task *task;
6045 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6046 "lbw: %llu inode %lu\n",
6047 data->task.tk_pid, sync,
6048 data->args.lastbytewritten,
6049 data->args.inode->i_ino);
6051 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6052 task = rpc_run_task(&task_setup_data);
6054 return PTR_ERR(task);
6057 status = nfs4_wait_for_completion_rpc_task(task);
6060 status = task->tk_status;
6062 dprintk("%s: status %d\n", __func__, status);
6068 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6069 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6071 struct nfs41_secinfo_no_name_args args = {
6072 .style = SECINFO_STYLE_CURRENT_FH,
6074 struct nfs4_secinfo_res res = {
6077 struct rpc_message msg = {
6078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6082 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6086 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6087 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6089 struct nfs4_exception exception = { };
6092 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6095 case -NFS4ERR_WRONGSEC:
6096 case -NFS4ERR_NOTSUPP:
6099 err = nfs4_handle_exception(server, err, &exception);
6101 } while (exception.retry);
6106 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6107 struct nfs_fsinfo *info)
6111 rpc_authflavor_t flavor;
6112 struct nfs4_secinfo_flavors *flavors;
6114 page = alloc_page(GFP_KERNEL);
6120 flavors = page_address(page);
6121 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6124 * Fall back on "guess and check" method if
6125 * the server doesn't support SECINFO_NO_NAME
6127 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6128 err = nfs4_find_root_sec(server, fhandle, info);
6134 flavor = nfs_find_best_sec(flavors);
6136 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6145 static int _nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6147 struct nfs41_test_stateid_args args = {
6148 .stateid = &state->stateid,
6150 struct nfs41_test_stateid_res res;
6151 struct rpc_message msg = {
6152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6156 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6157 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6160 static int nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6162 struct nfs4_exception exception = { };
6165 err = nfs4_handle_exception(server,
6166 _nfs41_test_stateid(server, state),
6168 } while (exception.retry);
6172 static int _nfs4_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6174 struct nfs41_free_stateid_args args = {
6175 .stateid = &state->stateid,
6177 struct nfs41_free_stateid_res res;
6178 struct rpc_message msg = {
6179 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6184 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6185 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6188 static int nfs41_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6190 struct nfs4_exception exception = { };
6193 err = nfs4_handle_exception(server,
6194 _nfs4_free_stateid(server, state),
6196 } while (exception.retry);
6199 #endif /* CONFIG_NFS_V4_1 */
6201 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6202 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6203 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6204 .recover_open = nfs4_open_reclaim,
6205 .recover_lock = nfs4_lock_reclaim,
6206 .establish_clid = nfs4_init_clientid,
6207 .get_clid_cred = nfs4_get_setclientid_cred,
6210 #if defined(CONFIG_NFS_V4_1)
6211 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6212 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6213 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6214 .recover_open = nfs4_open_reclaim,
6215 .recover_lock = nfs4_lock_reclaim,
6216 .establish_clid = nfs41_init_clientid,
6217 .get_clid_cred = nfs4_get_exchange_id_cred,
6218 .reclaim_complete = nfs41_proc_reclaim_complete,
6220 #endif /* CONFIG_NFS_V4_1 */
6222 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6223 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6224 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6225 .recover_open = nfs4_open_expired,
6226 .recover_lock = nfs4_lock_expired,
6227 .establish_clid = nfs4_init_clientid,
6228 .get_clid_cred = nfs4_get_setclientid_cred,
6231 #if defined(CONFIG_NFS_V4_1)
6232 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6233 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6234 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6235 .recover_open = nfs41_open_expired,
6236 .recover_lock = nfs41_lock_expired,
6237 .establish_clid = nfs41_init_clientid,
6238 .get_clid_cred = nfs4_get_exchange_id_cred,
6240 #endif /* CONFIG_NFS_V4_1 */
6242 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6243 .sched_state_renewal = nfs4_proc_async_renew,
6244 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6245 .renew_lease = nfs4_proc_renew,
6248 #if defined(CONFIG_NFS_V4_1)
6249 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6250 .sched_state_renewal = nfs41_proc_async_sequence,
6251 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6252 .renew_lease = nfs4_proc_sequence,
6256 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6258 .call_sync = _nfs4_call_sync,
6259 .validate_stateid = nfs4_validate_delegation_stateid,
6260 .find_root_sec = nfs4_find_root_sec,
6261 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6262 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6263 .state_renewal_ops = &nfs40_state_renewal_ops,
6266 #if defined(CONFIG_NFS_V4_1)
6267 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6269 .call_sync = _nfs4_call_sync_session,
6270 .validate_stateid = nfs41_validate_delegation_stateid,
6271 .find_root_sec = nfs41_find_root_sec,
6272 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6273 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6274 .state_renewal_ops = &nfs41_state_renewal_ops,
6278 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6279 [0] = &nfs_v4_0_minor_ops,
6280 #if defined(CONFIG_NFS_V4_1)
6281 [1] = &nfs_v4_1_minor_ops,
6285 static const struct inode_operations nfs4_file_inode_operations = {
6286 .permission = nfs_permission,
6287 .getattr = nfs_getattr,
6288 .setattr = nfs_setattr,
6289 .getxattr = generic_getxattr,
6290 .setxattr = generic_setxattr,
6291 .listxattr = generic_listxattr,
6292 .removexattr = generic_removexattr,
6295 const struct nfs_rpc_ops nfs_v4_clientops = {
6296 .version = 4, /* protocol version */
6297 .dentry_ops = &nfs4_dentry_operations,
6298 .dir_inode_ops = &nfs4_dir_inode_operations,
6299 .file_inode_ops = &nfs4_file_inode_operations,
6300 .file_ops = &nfs4_file_operations,
6301 .getroot = nfs4_proc_get_root,
6302 .getattr = nfs4_proc_getattr,
6303 .setattr = nfs4_proc_setattr,
6304 .lookup = nfs4_proc_lookup,
6305 .access = nfs4_proc_access,
6306 .readlink = nfs4_proc_readlink,
6307 .create = nfs4_proc_create,
6308 .remove = nfs4_proc_remove,
6309 .unlink_setup = nfs4_proc_unlink_setup,
6310 .unlink_done = nfs4_proc_unlink_done,
6311 .rename = nfs4_proc_rename,
6312 .rename_setup = nfs4_proc_rename_setup,
6313 .rename_done = nfs4_proc_rename_done,
6314 .link = nfs4_proc_link,
6315 .symlink = nfs4_proc_symlink,
6316 .mkdir = nfs4_proc_mkdir,
6317 .rmdir = nfs4_proc_remove,
6318 .readdir = nfs4_proc_readdir,
6319 .mknod = nfs4_proc_mknod,
6320 .statfs = nfs4_proc_statfs,
6321 .fsinfo = nfs4_proc_fsinfo,
6322 .pathconf = nfs4_proc_pathconf,
6323 .set_capabilities = nfs4_server_capabilities,
6324 .decode_dirent = nfs4_decode_dirent,
6325 .read_setup = nfs4_proc_read_setup,
6326 .read_done = nfs4_read_done,
6327 .write_setup = nfs4_proc_write_setup,
6328 .write_done = nfs4_write_done,
6329 .commit_setup = nfs4_proc_commit_setup,
6330 .commit_done = nfs4_commit_done,
6331 .lock = nfs4_proc_lock,
6332 .clear_acl_cache = nfs4_zap_acl_attr,
6333 .close_context = nfs4_close_context,
6334 .open_context = nfs4_atomic_open,
6335 .init_client = nfs4_init_client,
6336 .secinfo = nfs4_proc_secinfo,
6339 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6340 .prefix = XATTR_NAME_NFSV4_ACL,
6341 .list = nfs4_xattr_list_nfs4_acl,
6342 .get = nfs4_xattr_get_nfs4_acl,
6343 .set = nfs4_xattr_set_nfs4_acl,
6346 const struct xattr_handler *nfs4_xattr_handlers[] = {
6347 &nfs4_xattr_nfs4_acl_handler,