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/sunrpc/bc_xprt.h>
56 #include <linux/xattr.h>
57 #include <linux/utsname.h>
60 #include "delegation.h"
66 #define NFSDBG_FACILITY NFSDBG_PROC
68 #define NFS4_POLL_RETRY_MIN (HZ/10)
69 #define NFS4_POLL_RETRY_MAX (15*HZ)
71 #define NFS4_MAX_LOOP_ON_RECOVER (10)
74 static int _nfs4_proc_open(struct nfs4_opendata *data);
75 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
76 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
77 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
78 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
79 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
80 struct nfs_fattr *fattr, struct iattr *sattr,
81 struct nfs4_state *state);
82 #ifdef CONFIG_NFS_V4_1
83 static int nfs41_test_stateid(struct nfs_server *, struct nfs4_state *);
84 static int nfs41_free_stateid(struct nfs_server *, struct nfs4_state *);
86 /* Prevent leaks of NFSv4 errors into userland */
87 static int nfs4_map_errors(int err)
92 case -NFS4ERR_RESOURCE:
94 case -NFS4ERR_WRONGSEC:
96 case -NFS4ERR_BADOWNER:
97 case -NFS4ERR_BADNAME:
99 case -NFS4ERR_SHARE_DENIED:
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 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;
262 struct inode *inode = exception->inode;
265 exception->retry = 0;
269 case -NFS4ERR_OPENMODE:
270 if (nfs_have_delegation(inode, FMODE_READ)) {
271 nfs_inode_return_delegation(inode);
272 exception->retry = 1;
277 nfs4_schedule_stateid_recovery(server, state);
278 goto wait_on_recovery;
279 case -NFS4ERR_DELEG_REVOKED:
280 case -NFS4ERR_ADMIN_REVOKED:
281 case -NFS4ERR_BAD_STATEID:
283 nfs_remove_bad_delegation(state->inode);
286 nfs4_schedule_stateid_recovery(server, state);
287 goto wait_on_recovery;
288 case -NFS4ERR_EXPIRED:
290 nfs4_schedule_stateid_recovery(server, state);
291 case -NFS4ERR_STALE_STATEID:
292 case -NFS4ERR_STALE_CLIENTID:
293 nfs4_schedule_lease_recovery(clp);
294 goto wait_on_recovery;
295 #if defined(CONFIG_NFS_V4_1)
296 case -NFS4ERR_BADSESSION:
297 case -NFS4ERR_BADSLOT:
298 case -NFS4ERR_BAD_HIGH_SLOT:
299 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
300 case -NFS4ERR_DEADSESSION:
301 case -NFS4ERR_SEQ_FALSE_RETRY:
302 case -NFS4ERR_SEQ_MISORDERED:
303 dprintk("%s ERROR: %d Reset session\n", __func__,
305 nfs4_schedule_session_recovery(clp->cl_session);
306 goto wait_on_recovery;
307 #endif /* defined(CONFIG_NFS_V4_1) */
308 case -NFS4ERR_FILE_OPEN:
309 if (exception->timeout > HZ) {
310 /* We have retried a decent amount, time to
319 ret = nfs4_delay(server->client, &exception->timeout);
322 case -NFS4ERR_RETRY_UNCACHED_REP:
323 case -NFS4ERR_OLD_STATEID:
324 exception->retry = 1;
326 case -NFS4ERR_BADOWNER:
327 /* The following works around a Linux server bug! */
328 case -NFS4ERR_BADNAME:
329 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
330 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
331 exception->retry = 1;
332 printk(KERN_WARNING "NFS: v4 server %s "
333 "does not accept raw "
335 "Reenabling the idmapper.\n",
336 server->nfs_client->cl_hostname);
339 /* We failed to handle the error */
340 return nfs4_map_errors(ret);
342 ret = nfs4_wait_clnt_recover(clp);
344 exception->retry = 1;
349 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
351 spin_lock(&clp->cl_lock);
352 if (time_before(clp->cl_last_renewal,timestamp))
353 clp->cl_last_renewal = timestamp;
354 spin_unlock(&clp->cl_lock);
357 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
359 do_renew_lease(server->nfs_client, timestamp);
362 #if defined(CONFIG_NFS_V4_1)
365 * nfs4_free_slot - free a slot and efficiently update slot table.
367 * freeing a slot is trivially done by clearing its respective bit
369 * If the freed slotid equals highest_used_slotid we want to update it
370 * so that the server would be able to size down the slot table if needed,
371 * otherwise we know that the highest_used_slotid is still in use.
372 * When updating highest_used_slotid there may be "holes" in the bitmap
373 * so we need to scan down from highest_used_slotid to 0 looking for the now
374 * highest slotid in use.
375 * If none found, highest_used_slotid is set to -1.
377 * Must be called while holding tbl->slot_tbl_lock
380 nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
382 int free_slotid = free_slot - tbl->slots;
383 int slotid = free_slotid;
385 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
386 /* clear used bit in bitmap */
387 __clear_bit(slotid, tbl->used_slots);
389 /* update highest_used_slotid when it is freed */
390 if (slotid == tbl->highest_used_slotid) {
391 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
392 if (slotid < tbl->max_slots)
393 tbl->highest_used_slotid = slotid;
395 tbl->highest_used_slotid = -1;
397 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
398 free_slotid, tbl->highest_used_slotid);
402 * Signal state manager thread if session fore channel is drained
404 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
406 struct rpc_task *task;
408 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
409 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
411 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
415 if (ses->fc_slot_table.highest_used_slotid != -1)
418 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
419 complete(&ses->fc_slot_table.complete);
423 * Signal state manager thread if session back channel is drained
425 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
427 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
428 ses->bc_slot_table.highest_used_slotid != -1)
430 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
431 complete(&ses->bc_slot_table.complete);
434 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
436 struct nfs4_slot_table *tbl;
438 tbl = &res->sr_session->fc_slot_table;
440 /* just wake up the next guy waiting since
441 * we may have not consumed a slot after all */
442 dprintk("%s: No slot\n", __func__);
446 spin_lock(&tbl->slot_tbl_lock);
447 nfs4_free_slot(tbl, res->sr_slot);
448 nfs4_check_drain_fc_complete(res->sr_session);
449 spin_unlock(&tbl->slot_tbl_lock);
453 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
455 unsigned long timestamp;
456 struct nfs_client *clp;
459 * sr_status remains 1 if an RPC level error occurred. The server
460 * may or may not have processed the sequence operation..
461 * Proceed as if the server received and processed the sequence
464 if (res->sr_status == 1)
465 res->sr_status = NFS_OK;
467 /* don't increment the sequence number if the task wasn't sent */
468 if (!RPC_WAS_SENT(task))
471 /* Check the SEQUENCE operation status */
472 switch (res->sr_status) {
474 /* Update the slot's sequence and clientid lease timer */
475 ++res->sr_slot->seq_nr;
476 timestamp = res->sr_renewal_time;
477 clp = res->sr_session->clp;
478 do_renew_lease(clp, timestamp);
479 /* Check sequence flags */
480 if (res->sr_status_flags != 0)
481 nfs4_schedule_lease_recovery(clp);
484 /* The server detected a resend of the RPC call and
485 * returned NFS4ERR_DELAY as per Section 2.10.6.2
488 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
490 res->sr_slot - res->sr_session->fc_slot_table.slots,
491 res->sr_slot->seq_nr);
494 /* Just update the slot sequence no. */
495 ++res->sr_slot->seq_nr;
498 /* The session may be reset by one of the error handlers. */
499 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
500 nfs41_sequence_free_slot(res);
503 if (!rpc_restart_call(task))
505 rpc_delay(task, NFS4_POLL_RETRY_MAX);
509 static int nfs4_sequence_done(struct rpc_task *task,
510 struct nfs4_sequence_res *res)
512 if (res->sr_session == NULL)
514 return nfs41_sequence_done(task, res);
518 * nfs4_find_slot - efficiently look for a free slot
520 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
521 * If found, we mark the slot as used, update the highest_used_slotid,
522 * and respectively set up the sequence operation args.
523 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
525 * Note: must be called with under the slot_tbl_lock.
528 nfs4_find_slot(struct nfs4_slot_table *tbl)
531 u8 ret_id = NFS4_MAX_SLOT_TABLE;
532 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
534 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
535 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
537 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
538 if (slotid >= tbl->max_slots)
540 __set_bit(slotid, tbl->used_slots);
541 if (slotid > tbl->highest_used_slotid)
542 tbl->highest_used_slotid = slotid;
545 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
546 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
550 int nfs41_setup_sequence(struct nfs4_session *session,
551 struct nfs4_sequence_args *args,
552 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)) {
571 * The state manager will wait until the slot table is empty.
572 * Schedule the reset thread
574 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
575 spin_unlock(&tbl->slot_tbl_lock);
576 dprintk("%s Schedule Session Reset\n", __func__);
580 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
581 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
582 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
583 spin_unlock(&tbl->slot_tbl_lock);
584 dprintk("%s enforce FIFO order\n", __func__);
588 slotid = nfs4_find_slot(tbl);
589 if (slotid == NFS4_MAX_SLOT_TABLE) {
590 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
591 spin_unlock(&tbl->slot_tbl_lock);
592 dprintk("<-- %s: no free slots\n", __func__);
595 spin_unlock(&tbl->slot_tbl_lock);
597 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
598 slot = tbl->slots + slotid;
599 args->sa_session = session;
600 args->sa_slotid = slotid;
601 args->sa_cache_this = cache_reply;
603 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
605 res->sr_session = session;
607 res->sr_renewal_time = jiffies;
608 res->sr_status_flags = 0;
610 * sr_status is only set in decode_sequence, and so will remain
611 * set to 1 if an rpc level failure occurs.
616 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
618 int nfs4_setup_sequence(const struct nfs_server *server,
619 struct nfs4_sequence_args *args,
620 struct nfs4_sequence_res *res,
622 struct rpc_task *task)
624 struct nfs4_session *session = nfs4_get_session(server);
627 if (session == NULL) {
628 args->sa_session = NULL;
629 res->sr_session = NULL;
633 dprintk("--> %s clp %p session %p sr_slot %td\n",
634 __func__, session->clp, session, res->sr_slot ?
635 res->sr_slot - session->fc_slot_table.slots : -1);
637 ret = nfs41_setup_sequence(session, args, res, cache_reply,
640 dprintk("<-- %s status=%d\n", __func__, ret);
644 struct nfs41_call_sync_data {
645 const struct nfs_server *seq_server;
646 struct nfs4_sequence_args *seq_args;
647 struct nfs4_sequence_res *seq_res;
651 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
653 struct nfs41_call_sync_data *data = calldata;
655 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
657 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
658 data->seq_res, data->cache_reply, task))
660 rpc_call_start(task);
663 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
665 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
666 nfs41_call_sync_prepare(task, calldata);
669 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
671 struct nfs41_call_sync_data *data = calldata;
673 nfs41_sequence_done(task, data->seq_res);
676 struct rpc_call_ops nfs41_call_sync_ops = {
677 .rpc_call_prepare = nfs41_call_sync_prepare,
678 .rpc_call_done = nfs41_call_sync_done,
681 struct rpc_call_ops nfs41_call_priv_sync_ops = {
682 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
683 .rpc_call_done = nfs41_call_sync_done,
686 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
687 struct nfs_server *server,
688 struct rpc_message *msg,
689 struct nfs4_sequence_args *args,
690 struct nfs4_sequence_res *res,
695 struct rpc_task *task;
696 struct nfs41_call_sync_data data = {
697 .seq_server = server,
700 .cache_reply = cache_reply,
702 struct rpc_task_setup task_setup = {
705 .callback_ops = &nfs41_call_sync_ops,
706 .callback_data = &data
711 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
712 task = rpc_run_task(&task_setup);
716 ret = task->tk_status;
722 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
723 struct nfs_server *server,
724 struct rpc_message *msg,
725 struct nfs4_sequence_args *args,
726 struct nfs4_sequence_res *res,
729 return nfs4_call_sync_sequence(clnt, server, msg, args, res, cache_reply, 0);
733 static int nfs4_sequence_done(struct rpc_task *task,
734 struct nfs4_sequence_res *res)
738 #endif /* CONFIG_NFS_V4_1 */
740 int _nfs4_call_sync(struct rpc_clnt *clnt,
741 struct nfs_server *server,
742 struct rpc_message *msg,
743 struct nfs4_sequence_args *args,
744 struct nfs4_sequence_res *res,
747 args->sa_session = res->sr_session = NULL;
748 return rpc_call_sync(clnt, msg, 0);
752 int nfs4_call_sync(struct rpc_clnt *clnt,
753 struct nfs_server *server,
754 struct rpc_message *msg,
755 struct nfs4_sequence_args *args,
756 struct nfs4_sequence_res *res,
759 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
760 args, res, cache_reply);
763 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
765 struct nfs_inode *nfsi = NFS_I(dir);
767 spin_lock(&dir->i_lock);
768 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
769 if (!cinfo->atomic || cinfo->before != dir->i_version)
770 nfs_force_lookup_revalidate(dir);
771 dir->i_version = cinfo->after;
772 spin_unlock(&dir->i_lock);
775 struct nfs4_opendata {
777 struct nfs_openargs o_arg;
778 struct nfs_openres o_res;
779 struct nfs_open_confirmargs c_arg;
780 struct nfs_open_confirmres c_res;
781 struct nfs_fattr f_attr;
782 struct nfs_fattr dir_attr;
784 struct dentry *dentry;
785 struct nfs4_state_owner *owner;
786 struct nfs4_state *state;
788 unsigned long timestamp;
789 unsigned int rpc_done : 1;
795 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
797 p->o_res.f_attr = &p->f_attr;
798 p->o_res.dir_attr = &p->dir_attr;
799 p->o_res.seqid = p->o_arg.seqid;
800 p->c_res.seqid = p->c_arg.seqid;
801 p->o_res.server = p->o_arg.server;
802 nfs_fattr_init(&p->f_attr);
803 nfs_fattr_init(&p->dir_attr);
806 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
807 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
808 const struct iattr *attrs,
811 struct dentry *parent = dget_parent(dentry);
812 struct inode *dir = parent->d_inode;
813 struct nfs_server *server = NFS_SERVER(dir);
814 struct nfs4_opendata *p;
816 p = kzalloc(sizeof(*p), gfp_mask);
819 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
820 if (p->o_arg.seqid == NULL)
822 nfs_sb_active(dentry->d_sb);
823 p->dentry = dget(dentry);
826 atomic_inc(&sp->so_count);
827 p->o_arg.fh = NFS_FH(dir);
828 p->o_arg.open_flags = flags;
829 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
830 p->o_arg.clientid = server->nfs_client->cl_clientid;
831 p->o_arg.id = sp->so_owner_id.id;
832 p->o_arg.name = &dentry->d_name;
833 p->o_arg.server = server;
834 p->o_arg.bitmask = server->attr_bitmask;
835 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
836 if (flags & O_CREAT) {
839 p->o_arg.u.attrs = &p->attrs;
840 memcpy(&p->attrs, attrs, sizeof(p->attrs));
841 s = (u32 *) p->o_arg.u.verifier.data;
845 p->c_arg.fh = &p->o_res.fh;
846 p->c_arg.stateid = &p->o_res.stateid;
847 p->c_arg.seqid = p->o_arg.seqid;
848 nfs4_init_opendata_res(p);
858 static void nfs4_opendata_free(struct kref *kref)
860 struct nfs4_opendata *p = container_of(kref,
861 struct nfs4_opendata, kref);
862 struct super_block *sb = p->dentry->d_sb;
864 nfs_free_seqid(p->o_arg.seqid);
865 if (p->state != NULL)
866 nfs4_put_open_state(p->state);
867 nfs4_put_state_owner(p->owner);
874 static void nfs4_opendata_put(struct nfs4_opendata *p)
877 kref_put(&p->kref, nfs4_opendata_free);
880 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
884 ret = rpc_wait_for_completion_task(task);
888 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
892 if (open_mode & O_EXCL)
894 switch (mode & (FMODE_READ|FMODE_WRITE)) {
896 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
897 && state->n_rdonly != 0;
900 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
901 && state->n_wronly != 0;
903 case FMODE_READ|FMODE_WRITE:
904 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
905 && state->n_rdwr != 0;
911 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
913 if (delegation == NULL)
915 if ((delegation->type & fmode) != fmode)
917 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
919 nfs_mark_delegation_referenced(delegation);
923 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
932 case FMODE_READ|FMODE_WRITE:
935 nfs4_state_set_mode_locked(state, state->state | fmode);
938 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
940 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
941 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
942 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
945 set_bit(NFS_O_RDONLY_STATE, &state->flags);
948 set_bit(NFS_O_WRONLY_STATE, &state->flags);
950 case FMODE_READ|FMODE_WRITE:
951 set_bit(NFS_O_RDWR_STATE, &state->flags);
955 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
957 write_seqlock(&state->seqlock);
958 nfs_set_open_stateid_locked(state, stateid, fmode);
959 write_sequnlock(&state->seqlock);
962 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
965 * Protect the call to nfs4_state_set_mode_locked and
966 * serialise the stateid update
968 write_seqlock(&state->seqlock);
969 if (deleg_stateid != NULL) {
970 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
971 set_bit(NFS_DELEGATED_STATE, &state->flags);
973 if (open_stateid != NULL)
974 nfs_set_open_stateid_locked(state, open_stateid, fmode);
975 write_sequnlock(&state->seqlock);
976 spin_lock(&state->owner->so_lock);
977 update_open_stateflags(state, fmode);
978 spin_unlock(&state->owner->so_lock);
981 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
983 struct nfs_inode *nfsi = NFS_I(state->inode);
984 struct nfs_delegation *deleg_cur;
987 fmode &= (FMODE_READ|FMODE_WRITE);
990 deleg_cur = rcu_dereference(nfsi->delegation);
991 if (deleg_cur == NULL)
994 spin_lock(&deleg_cur->lock);
995 if (nfsi->delegation != deleg_cur ||
996 (deleg_cur->type & fmode) != fmode)
997 goto no_delegation_unlock;
999 if (delegation == NULL)
1000 delegation = &deleg_cur->stateid;
1001 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
1002 goto no_delegation_unlock;
1004 nfs_mark_delegation_referenced(deleg_cur);
1005 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1007 no_delegation_unlock:
1008 spin_unlock(&deleg_cur->lock);
1012 if (!ret && open_stateid != NULL) {
1013 __update_open_stateid(state, open_stateid, NULL, fmode);
1021 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1023 struct nfs_delegation *delegation;
1026 delegation = rcu_dereference(NFS_I(inode)->delegation);
1027 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1032 nfs_inode_return_delegation(inode);
1035 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1037 struct nfs4_state *state = opendata->state;
1038 struct nfs_inode *nfsi = NFS_I(state->inode);
1039 struct nfs_delegation *delegation;
1040 int open_mode = opendata->o_arg.open_flags & O_EXCL;
1041 fmode_t fmode = opendata->o_arg.fmode;
1042 nfs4_stateid stateid;
1046 if (can_open_cached(state, fmode, open_mode)) {
1047 spin_lock(&state->owner->so_lock);
1048 if (can_open_cached(state, fmode, open_mode)) {
1049 update_open_stateflags(state, fmode);
1050 spin_unlock(&state->owner->so_lock);
1051 goto out_return_state;
1053 spin_unlock(&state->owner->so_lock);
1056 delegation = rcu_dereference(nfsi->delegation);
1057 if (!can_open_delegated(delegation, fmode)) {
1061 /* Save the delegation */
1062 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1064 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1069 /* Try to update the stateid using the delegation */
1070 if (update_open_stateid(state, NULL, &stateid, fmode))
1071 goto out_return_state;
1074 return ERR_PTR(ret);
1076 atomic_inc(&state->count);
1080 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1082 struct inode *inode;
1083 struct nfs4_state *state = NULL;
1084 struct nfs_delegation *delegation;
1087 if (!data->rpc_done) {
1088 state = nfs4_try_open_cached(data);
1093 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1095 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1096 ret = PTR_ERR(inode);
1100 state = nfs4_get_open_state(inode, data->owner);
1103 if (data->o_res.delegation_type != 0) {
1104 int delegation_flags = 0;
1107 delegation = rcu_dereference(NFS_I(inode)->delegation);
1109 delegation_flags = delegation->flags;
1111 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1112 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1113 "returning a delegation for "
1114 "OPEN(CLAIM_DELEGATE_CUR)\n",
1115 NFS_CLIENT(inode)->cl_server);
1116 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1117 nfs_inode_set_delegation(state->inode,
1118 data->owner->so_cred,
1121 nfs_inode_reclaim_delegation(state->inode,
1122 data->owner->so_cred,
1126 update_open_stateid(state, &data->o_res.stateid, NULL,
1134 return ERR_PTR(ret);
1137 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1139 struct nfs_inode *nfsi = NFS_I(state->inode);
1140 struct nfs_open_context *ctx;
1142 spin_lock(&state->inode->i_lock);
1143 list_for_each_entry(ctx, &nfsi->open_files, list) {
1144 if (ctx->state != state)
1146 get_nfs_open_context(ctx);
1147 spin_unlock(&state->inode->i_lock);
1150 spin_unlock(&state->inode->i_lock);
1151 return ERR_PTR(-ENOENT);
1154 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1156 struct nfs4_opendata *opendata;
1158 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1159 if (opendata == NULL)
1160 return ERR_PTR(-ENOMEM);
1161 opendata->state = state;
1162 atomic_inc(&state->count);
1166 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1168 struct nfs4_state *newstate;
1171 opendata->o_arg.open_flags = 0;
1172 opendata->o_arg.fmode = fmode;
1173 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1174 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1175 nfs4_init_opendata_res(opendata);
1176 ret = _nfs4_recover_proc_open(opendata);
1179 newstate = nfs4_opendata_to_nfs4_state(opendata);
1180 if (IS_ERR(newstate))
1181 return PTR_ERR(newstate);
1182 nfs4_close_state(newstate, fmode);
1187 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1189 struct nfs4_state *newstate;
1192 /* memory barrier prior to reading state->n_* */
1193 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1195 if (state->n_rdwr != 0) {
1196 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1197 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1200 if (newstate != state)
1203 if (state->n_wronly != 0) {
1204 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1205 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1208 if (newstate != state)
1211 if (state->n_rdonly != 0) {
1212 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1213 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1216 if (newstate != state)
1220 * We may have performed cached opens for all three recoveries.
1221 * Check if we need to update the current stateid.
1223 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1224 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1225 write_seqlock(&state->seqlock);
1226 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1227 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1228 write_sequnlock(&state->seqlock);
1235 * reclaim state on the server after a reboot.
1237 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1239 struct nfs_delegation *delegation;
1240 struct nfs4_opendata *opendata;
1241 fmode_t delegation_type = 0;
1244 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1245 if (IS_ERR(opendata))
1246 return PTR_ERR(opendata);
1247 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1248 opendata->o_arg.fh = NFS_FH(state->inode);
1250 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1251 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1252 delegation_type = delegation->type;
1254 opendata->o_arg.u.delegation_type = delegation_type;
1255 status = nfs4_open_recover(opendata, state);
1256 nfs4_opendata_put(opendata);
1260 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1262 struct nfs_server *server = NFS_SERVER(state->inode);
1263 struct nfs4_exception exception = { };
1266 err = _nfs4_do_open_reclaim(ctx, state);
1267 if (err != -NFS4ERR_DELAY)
1269 nfs4_handle_exception(server, err, &exception);
1270 } while (exception.retry);
1274 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1276 struct nfs_open_context *ctx;
1279 ctx = nfs4_state_find_open_context(state);
1281 return PTR_ERR(ctx);
1282 ret = nfs4_do_open_reclaim(ctx, state);
1283 put_nfs_open_context(ctx);
1287 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1289 struct nfs4_opendata *opendata;
1292 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1293 if (IS_ERR(opendata))
1294 return PTR_ERR(opendata);
1295 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1296 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1297 sizeof(opendata->o_arg.u.delegation.data));
1298 ret = nfs4_open_recover(opendata, state);
1299 nfs4_opendata_put(opendata);
1303 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1305 struct nfs4_exception exception = { };
1306 struct nfs_server *server = NFS_SERVER(state->inode);
1309 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1315 case -NFS4ERR_BADSESSION:
1316 case -NFS4ERR_BADSLOT:
1317 case -NFS4ERR_BAD_HIGH_SLOT:
1318 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1319 case -NFS4ERR_DEADSESSION:
1320 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1322 case -NFS4ERR_STALE_CLIENTID:
1323 case -NFS4ERR_STALE_STATEID:
1324 case -NFS4ERR_EXPIRED:
1325 /* Don't recall a delegation if it was lost */
1326 nfs4_schedule_lease_recovery(server->nfs_client);
1330 * The show must go on: exit, but mark the
1331 * stateid as needing recovery.
1333 case -NFS4ERR_DELEG_REVOKED:
1334 case -NFS4ERR_ADMIN_REVOKED:
1335 case -NFS4ERR_BAD_STATEID:
1336 nfs_inode_find_state_and_recover(state->inode,
1338 nfs4_schedule_stateid_recovery(server, state);
1341 * User RPCSEC_GSS context has expired.
1342 * We cannot recover this stateid now, so
1343 * skip it and allow recovery thread to
1350 err = nfs4_handle_exception(server, err, &exception);
1351 } while (exception.retry);
1356 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1358 struct nfs4_opendata *data = calldata;
1360 data->rpc_status = task->tk_status;
1361 if (data->rpc_status == 0) {
1362 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1363 sizeof(data->o_res.stateid.data));
1364 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1365 renew_lease(data->o_res.server, data->timestamp);
1370 static void nfs4_open_confirm_release(void *calldata)
1372 struct nfs4_opendata *data = calldata;
1373 struct nfs4_state *state = NULL;
1375 /* If this request hasn't been cancelled, do nothing */
1376 if (data->cancelled == 0)
1378 /* In case of error, no cleanup! */
1379 if (!data->rpc_done)
1381 state = nfs4_opendata_to_nfs4_state(data);
1383 nfs4_close_state(state, data->o_arg.fmode);
1385 nfs4_opendata_put(data);
1388 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1389 .rpc_call_done = nfs4_open_confirm_done,
1390 .rpc_release = nfs4_open_confirm_release,
1394 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1396 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1398 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1399 struct rpc_task *task;
1400 struct rpc_message msg = {
1401 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1402 .rpc_argp = &data->c_arg,
1403 .rpc_resp = &data->c_res,
1404 .rpc_cred = data->owner->so_cred,
1406 struct rpc_task_setup task_setup_data = {
1407 .rpc_client = server->client,
1408 .rpc_message = &msg,
1409 .callback_ops = &nfs4_open_confirm_ops,
1410 .callback_data = data,
1411 .workqueue = nfsiod_workqueue,
1412 .flags = RPC_TASK_ASYNC,
1416 kref_get(&data->kref);
1418 data->rpc_status = 0;
1419 data->timestamp = jiffies;
1420 task = rpc_run_task(&task_setup_data);
1422 return PTR_ERR(task);
1423 status = nfs4_wait_for_completion_rpc_task(task);
1425 data->cancelled = 1;
1428 status = data->rpc_status;
1433 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1435 struct nfs4_opendata *data = calldata;
1436 struct nfs4_state_owner *sp = data->owner;
1438 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1441 * Check if we still need to send an OPEN call, or if we can use
1442 * a delegation instead.
1444 if (data->state != NULL) {
1445 struct nfs_delegation *delegation;
1447 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1450 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1451 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1452 can_open_delegated(delegation, data->o_arg.fmode))
1453 goto unlock_no_action;
1456 /* Update sequence id. */
1457 data->o_arg.id = sp->so_owner_id.id;
1458 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1459 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1460 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1461 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1463 data->timestamp = jiffies;
1464 if (nfs4_setup_sequence(data->o_arg.server,
1465 &data->o_arg.seq_args,
1466 &data->o_res.seq_res,
1468 nfs_release_seqid(data->o_arg.seqid);
1470 rpc_call_start(task);
1475 task->tk_action = NULL;
1479 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1481 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1482 nfs4_open_prepare(task, calldata);
1485 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1487 struct nfs4_opendata *data = calldata;
1489 data->rpc_status = task->tk_status;
1491 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1494 if (task->tk_status == 0) {
1495 switch (data->o_res.f_attr->mode & S_IFMT) {
1499 data->rpc_status = -ELOOP;
1502 data->rpc_status = -EISDIR;
1505 data->rpc_status = -ENOTDIR;
1507 renew_lease(data->o_res.server, data->timestamp);
1508 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1509 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1514 static void nfs4_open_release(void *calldata)
1516 struct nfs4_opendata *data = calldata;
1517 struct nfs4_state *state = NULL;
1519 /* If this request hasn't been cancelled, do nothing */
1520 if (data->cancelled == 0)
1522 /* In case of error, no cleanup! */
1523 if (data->rpc_status != 0 || !data->rpc_done)
1525 /* In case we need an open_confirm, no cleanup! */
1526 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1528 state = nfs4_opendata_to_nfs4_state(data);
1530 nfs4_close_state(state, data->o_arg.fmode);
1532 nfs4_opendata_put(data);
1535 static const struct rpc_call_ops nfs4_open_ops = {
1536 .rpc_call_prepare = nfs4_open_prepare,
1537 .rpc_call_done = nfs4_open_done,
1538 .rpc_release = nfs4_open_release,
1541 static const struct rpc_call_ops nfs4_recover_open_ops = {
1542 .rpc_call_prepare = nfs4_recover_open_prepare,
1543 .rpc_call_done = nfs4_open_done,
1544 .rpc_release = nfs4_open_release,
1547 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1549 struct inode *dir = data->dir->d_inode;
1550 struct nfs_server *server = NFS_SERVER(dir);
1551 struct nfs_openargs *o_arg = &data->o_arg;
1552 struct nfs_openres *o_res = &data->o_res;
1553 struct rpc_task *task;
1554 struct rpc_message msg = {
1555 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1558 .rpc_cred = data->owner->so_cred,
1560 struct rpc_task_setup task_setup_data = {
1561 .rpc_client = server->client,
1562 .rpc_message = &msg,
1563 .callback_ops = &nfs4_open_ops,
1564 .callback_data = data,
1565 .workqueue = nfsiod_workqueue,
1566 .flags = RPC_TASK_ASYNC,
1570 kref_get(&data->kref);
1572 data->rpc_status = 0;
1573 data->cancelled = 0;
1575 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1576 task = rpc_run_task(&task_setup_data);
1578 return PTR_ERR(task);
1579 status = nfs4_wait_for_completion_rpc_task(task);
1581 data->cancelled = 1;
1584 status = data->rpc_status;
1590 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1592 struct inode *dir = data->dir->d_inode;
1593 struct nfs_openres *o_res = &data->o_res;
1596 status = nfs4_run_open_task(data, 1);
1597 if (status != 0 || !data->rpc_done)
1600 nfs_refresh_inode(dir, o_res->dir_attr);
1602 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1603 status = _nfs4_proc_open_confirm(data);
1612 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1614 static int _nfs4_proc_open(struct nfs4_opendata *data)
1616 struct inode *dir = data->dir->d_inode;
1617 struct nfs_server *server = NFS_SERVER(dir);
1618 struct nfs_openargs *o_arg = &data->o_arg;
1619 struct nfs_openres *o_res = &data->o_res;
1622 status = nfs4_run_open_task(data, 0);
1623 if (!data->rpc_done)
1626 if (status == -NFS4ERR_BADNAME &&
1627 !(o_arg->open_flags & O_CREAT))
1632 if (o_arg->open_flags & O_CREAT) {
1633 update_changeattr(dir, &o_res->cinfo);
1634 nfs_post_op_update_inode(dir, o_res->dir_attr);
1636 nfs_refresh_inode(dir, o_res->dir_attr);
1637 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1638 server->caps &= ~NFS_CAP_POSIX_LOCK;
1639 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1640 status = _nfs4_proc_open_confirm(data);
1644 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1645 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1649 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1654 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1655 ret = nfs4_wait_clnt_recover(clp);
1658 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1659 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1661 nfs4_schedule_state_manager(clp);
1667 static int nfs4_recover_expired_lease(struct nfs_server *server)
1669 return nfs4_client_recover_expired_lease(server->nfs_client);
1674 * reclaim state on the server after a network partition.
1675 * Assumes caller holds the appropriate lock
1677 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1679 struct nfs4_opendata *opendata;
1682 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1683 if (IS_ERR(opendata))
1684 return PTR_ERR(opendata);
1685 ret = nfs4_open_recover(opendata, state);
1687 d_drop(ctx->dentry);
1688 nfs4_opendata_put(opendata);
1692 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1694 struct nfs_server *server = NFS_SERVER(state->inode);
1695 struct nfs4_exception exception = { };
1699 err = _nfs4_open_expired(ctx, state);
1703 case -NFS4ERR_GRACE:
1704 case -NFS4ERR_DELAY:
1705 nfs4_handle_exception(server, err, &exception);
1708 } while (exception.retry);
1713 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1715 struct nfs_open_context *ctx;
1718 ctx = nfs4_state_find_open_context(state);
1720 return PTR_ERR(ctx);
1721 ret = nfs4_do_open_expired(ctx, state);
1722 put_nfs_open_context(ctx);
1726 #if defined(CONFIG_NFS_V4_1)
1727 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1730 struct nfs_server *server = NFS_SERVER(state->inode);
1732 status = nfs41_test_stateid(server, state);
1733 if (status == NFS_OK)
1735 nfs41_free_stateid(server, state);
1736 return nfs4_open_expired(sp, state);
1741 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1742 * fields corresponding to attributes that were used to store the verifier.
1743 * Make sure we clobber those fields in the later setattr call
1745 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1747 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1748 !(sattr->ia_valid & ATTR_ATIME_SET))
1749 sattr->ia_valid |= ATTR_ATIME;
1751 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1752 !(sattr->ia_valid & ATTR_MTIME_SET))
1753 sattr->ia_valid |= ATTR_MTIME;
1757 * Returns a referenced nfs4_state
1759 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)
1761 struct nfs4_state_owner *sp;
1762 struct nfs4_state *state = NULL;
1763 struct nfs_server *server = NFS_SERVER(dir);
1764 struct nfs4_opendata *opendata;
1767 /* Protect against reboot recovery conflicts */
1769 if (!(sp = nfs4_get_state_owner(server, cred))) {
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 nfs_revalidate_inode(server, state->inode);
1809 nfs4_opendata_put(opendata);
1810 nfs4_put_state_owner(sp);
1814 nfs4_opendata_put(opendata);
1815 err_put_state_owner:
1816 nfs4_put_state_owner(sp);
1823 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)
1825 struct nfs4_exception exception = { };
1826 struct nfs4_state *res;
1829 fmode &= FMODE_READ|FMODE_WRITE;
1831 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred, &res);
1834 /* NOTE: BAD_SEQID means the server and client disagree about the
1835 * book-keeping w.r.t. state-changing operations
1836 * (OPEN/CLOSE/LOCK/LOCKU...)
1837 * It is actually a sign of a bug on the client or on the server.
1839 * If we receive a BAD_SEQID error in the particular case of
1840 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1841 * have unhashed the old state_owner for us, and that we can
1842 * therefore safely retry using a new one. We should still warn
1843 * the user though...
1845 if (status == -NFS4ERR_BAD_SEQID) {
1846 pr_warn_ratelimited("NFS: v4 server %s "
1847 " returned a bad sequence-id error!\n",
1848 NFS_SERVER(dir)->nfs_client->cl_hostname);
1849 exception.retry = 1;
1853 * BAD_STATEID on OPEN means that the server cancelled our
1854 * state before it received the OPEN_CONFIRM.
1855 * Recover by retrying the request as per the discussion
1856 * on Page 181 of RFC3530.
1858 if (status == -NFS4ERR_BAD_STATEID) {
1859 exception.retry = 1;
1862 if (status == -EAGAIN) {
1863 /* We must have found a delegation */
1864 exception.retry = 1;
1867 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1868 status, &exception));
1869 } while (exception.retry);
1873 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1874 struct nfs_fattr *fattr, struct iattr *sattr,
1875 struct nfs4_state *state)
1877 struct nfs_server *server = NFS_SERVER(inode);
1878 struct nfs_setattrargs arg = {
1879 .fh = NFS_FH(inode),
1882 .bitmask = server->attr_bitmask,
1884 struct nfs_setattrres res = {
1888 struct rpc_message msg = {
1889 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1894 unsigned long timestamp = jiffies;
1897 nfs_fattr_init(fattr);
1899 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1900 /* Use that stateid */
1901 } else if (state != NULL) {
1902 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1904 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1906 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1907 if (status == 0 && state != NULL)
1908 renew_lease(server, timestamp);
1912 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1913 struct nfs_fattr *fattr, struct iattr *sattr,
1914 struct nfs4_state *state)
1916 struct nfs_server *server = NFS_SERVER(inode);
1917 struct nfs4_exception exception = {
1923 err = nfs4_handle_exception(server,
1924 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1926 } while (exception.retry);
1930 struct nfs4_closedata {
1931 struct inode *inode;
1932 struct nfs4_state *state;
1933 struct nfs_closeargs arg;
1934 struct nfs_closeres res;
1935 struct nfs_fattr fattr;
1936 unsigned long timestamp;
1941 static void nfs4_free_closedata(void *data)
1943 struct nfs4_closedata *calldata = data;
1944 struct nfs4_state_owner *sp = calldata->state->owner;
1945 struct super_block *sb = calldata->state->inode->i_sb;
1948 pnfs_roc_release(calldata->state->inode);
1949 nfs4_put_open_state(calldata->state);
1950 nfs_free_seqid(calldata->arg.seqid);
1951 nfs4_put_state_owner(sp);
1952 nfs_sb_deactive(sb);
1956 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1959 spin_lock(&state->owner->so_lock);
1960 if (!(fmode & FMODE_READ))
1961 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1962 if (!(fmode & FMODE_WRITE))
1963 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1964 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1965 spin_unlock(&state->owner->so_lock);
1968 static void nfs4_close_done(struct rpc_task *task, void *data)
1970 struct nfs4_closedata *calldata = data;
1971 struct nfs4_state *state = calldata->state;
1972 struct nfs_server *server = NFS_SERVER(calldata->inode);
1974 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1976 /* hmm. we are done with the inode, and in the process of freeing
1977 * the state_owner. we keep this around to process errors
1979 switch (task->tk_status) {
1982 pnfs_roc_set_barrier(state->inode,
1983 calldata->roc_barrier);
1984 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1985 renew_lease(server, calldata->timestamp);
1986 nfs4_close_clear_stateid_flags(state,
1987 calldata->arg.fmode);
1989 case -NFS4ERR_STALE_STATEID:
1990 case -NFS4ERR_OLD_STATEID:
1991 case -NFS4ERR_BAD_STATEID:
1992 case -NFS4ERR_EXPIRED:
1993 if (calldata->arg.fmode == 0)
1996 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1997 rpc_restart_call_prepare(task);
1999 nfs_release_seqid(calldata->arg.seqid);
2000 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2003 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2005 struct nfs4_closedata *calldata = data;
2006 struct nfs4_state *state = calldata->state;
2007 bool is_rdonly, is_wronly, is_rdwr;
2010 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2013 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2014 spin_lock(&state->owner->so_lock);
2015 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2016 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2017 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
2018 /* Calculate the current open share mode */
2019 calldata->arg.fmode = 0;
2020 if (is_rdonly || is_rdwr)
2021 calldata->arg.fmode |= FMODE_READ;
2022 if (is_wronly || is_rdwr)
2023 calldata->arg.fmode |= FMODE_WRITE;
2024 /* Calculate the change in open mode */
2025 if (state->n_rdwr == 0) {
2026 if (state->n_rdonly == 0) {
2027 call_close |= is_rdonly || is_rdwr;
2028 calldata->arg.fmode &= ~FMODE_READ;
2030 if (state->n_wronly == 0) {
2031 call_close |= is_wronly || is_rdwr;
2032 calldata->arg.fmode &= ~FMODE_WRITE;
2035 spin_unlock(&state->owner->so_lock);
2038 /* Note: exit _without_ calling nfs4_close_done */
2039 task->tk_action = NULL;
2043 if (calldata->arg.fmode == 0) {
2044 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2045 if (calldata->roc &&
2046 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2047 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2053 nfs_fattr_init(calldata->res.fattr);
2054 calldata->timestamp = jiffies;
2055 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2056 &calldata->arg.seq_args, &calldata->res.seq_res,
2058 nfs_release_seqid(calldata->arg.seqid);
2060 rpc_call_start(task);
2063 static const struct rpc_call_ops nfs4_close_ops = {
2064 .rpc_call_prepare = nfs4_close_prepare,
2065 .rpc_call_done = nfs4_close_done,
2066 .rpc_release = nfs4_free_closedata,
2070 * It is possible for data to be read/written from a mem-mapped file
2071 * after the sys_close call (which hits the vfs layer as a flush).
2072 * This means that we can't safely call nfsv4 close on a file until
2073 * the inode is cleared. This in turn means that we are not good
2074 * NFSv4 citizens - we do not indicate to the server to update the file's
2075 * share state even when we are done with one of the three share
2076 * stateid's in the inode.
2078 * NOTE: Caller must be holding the sp->so_owner semaphore!
2080 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2082 struct nfs_server *server = NFS_SERVER(state->inode);
2083 struct nfs4_closedata *calldata;
2084 struct nfs4_state_owner *sp = state->owner;
2085 struct rpc_task *task;
2086 struct rpc_message msg = {
2087 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2088 .rpc_cred = state->owner->so_cred,
2090 struct rpc_task_setup task_setup_data = {
2091 .rpc_client = server->client,
2092 .rpc_message = &msg,
2093 .callback_ops = &nfs4_close_ops,
2094 .workqueue = nfsiod_workqueue,
2095 .flags = RPC_TASK_ASYNC,
2097 int status = -ENOMEM;
2099 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2100 if (calldata == NULL)
2102 calldata->inode = state->inode;
2103 calldata->state = state;
2104 calldata->arg.fh = NFS_FH(state->inode);
2105 calldata->arg.stateid = &state->open_stateid;
2106 /* Serialization for the sequence id */
2107 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2108 if (calldata->arg.seqid == NULL)
2109 goto out_free_calldata;
2110 calldata->arg.fmode = 0;
2111 calldata->arg.bitmask = server->cache_consistency_bitmask;
2112 calldata->res.fattr = &calldata->fattr;
2113 calldata->res.seqid = calldata->arg.seqid;
2114 calldata->res.server = server;
2115 calldata->roc = roc;
2116 nfs_sb_active(calldata->inode->i_sb);
2118 msg.rpc_argp = &calldata->arg;
2119 msg.rpc_resp = &calldata->res;
2120 task_setup_data.callback_data = calldata;
2121 task = rpc_run_task(&task_setup_data);
2123 return PTR_ERR(task);
2126 status = rpc_wait_for_completion_task(task);
2133 pnfs_roc_release(state->inode);
2134 nfs4_put_open_state(state);
2135 nfs4_put_state_owner(sp);
2139 static struct inode *
2140 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2142 struct nfs4_state *state;
2144 /* Protect against concurrent sillydeletes */
2145 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, ctx->cred);
2147 return ERR_CAST(state);
2149 return igrab(state->inode);
2152 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2154 if (ctx->state == NULL)
2157 nfs4_close_sync(ctx->state, ctx->mode);
2159 nfs4_close_state(ctx->state, ctx->mode);
2162 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2164 struct nfs4_server_caps_arg args = {
2167 struct nfs4_server_caps_res res = {};
2168 struct rpc_message msg = {
2169 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2175 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2177 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2178 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2179 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2180 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2181 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2182 NFS_CAP_CTIME|NFS_CAP_MTIME);
2183 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2184 server->caps |= NFS_CAP_ACLS;
2185 if (res.has_links != 0)
2186 server->caps |= NFS_CAP_HARDLINKS;
2187 if (res.has_symlinks != 0)
2188 server->caps |= NFS_CAP_SYMLINKS;
2189 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2190 server->caps |= NFS_CAP_FILEID;
2191 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2192 server->caps |= NFS_CAP_MODE;
2193 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2194 server->caps |= NFS_CAP_NLINK;
2195 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2196 server->caps |= NFS_CAP_OWNER;
2197 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2198 server->caps |= NFS_CAP_OWNER_GROUP;
2199 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2200 server->caps |= NFS_CAP_ATIME;
2201 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2202 server->caps |= NFS_CAP_CTIME;
2203 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2204 server->caps |= NFS_CAP_MTIME;
2206 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2207 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2208 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2209 server->acl_bitmask = res.acl_bitmask;
2215 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2217 struct nfs4_exception exception = { };
2220 err = nfs4_handle_exception(server,
2221 _nfs4_server_capabilities(server, fhandle),
2223 } while (exception.retry);
2227 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2228 struct nfs_fsinfo *info)
2230 struct nfs4_lookup_root_arg args = {
2231 .bitmask = nfs4_fattr_bitmap,
2233 struct nfs4_lookup_res res = {
2235 .fattr = info->fattr,
2238 struct rpc_message msg = {
2239 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2244 nfs_fattr_init(info->fattr);
2245 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2248 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2249 struct nfs_fsinfo *info)
2251 struct nfs4_exception exception = { };
2254 err = _nfs4_lookup_root(server, fhandle, info);
2257 case -NFS4ERR_WRONGSEC:
2260 err = nfs4_handle_exception(server, err, &exception);
2262 } while (exception.retry);
2267 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2268 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2270 struct rpc_auth *auth;
2273 auth = rpcauth_create(flavor, server->client);
2278 ret = nfs4_lookup_root(server, fhandle, info);
2283 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2284 struct nfs_fsinfo *info)
2286 int i, len, status = 0;
2287 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2289 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2290 flav_array[len] = RPC_AUTH_NULL;
2293 for (i = 0; i < len; i++) {
2294 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2295 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2300 * -EACCESS could mean that the user doesn't have correct permissions
2301 * to access the mount. It could also mean that we tried to mount
2302 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2303 * existing mount programs don't handle -EACCES very well so it should
2304 * be mapped to -EPERM instead.
2306 if (status == -EACCES)
2312 * get the file handle for the "/" directory on the server
2314 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2315 struct nfs_fsinfo *info)
2317 int minor_version = server->nfs_client->cl_minorversion;
2318 int status = nfs4_lookup_root(server, fhandle, info);
2319 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2321 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2322 * by nfs4_map_errors() as this function exits.
2324 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2326 status = nfs4_server_capabilities(server, fhandle);
2328 status = nfs4_do_fsinfo(server, fhandle, info);
2329 return nfs4_map_errors(status);
2332 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
2334 * Get locations and (maybe) other attributes of a referral.
2335 * Note that we'll actually follow the referral later when
2336 * we detect fsid mismatch in inode revalidation
2338 static int nfs4_get_referral(struct inode *dir, const struct qstr *name,
2339 struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2341 int status = -ENOMEM;
2342 struct page *page = NULL;
2343 struct nfs4_fs_locations *locations = NULL;
2345 page = alloc_page(GFP_KERNEL);
2348 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2349 if (locations == NULL)
2352 status = nfs4_proc_fs_locations(dir, name, locations, page);
2355 /* Make sure server returned a different fsid for the referral */
2356 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2357 dprintk("%s: server did not return a different fsid for"
2358 " a referral at %s\n", __func__, name->name);
2362 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2363 nfs_fixup_referral_attributes(&locations->fattr);
2365 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2366 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2367 memset(fhandle, 0, sizeof(struct nfs_fh));
2375 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2377 struct nfs4_getattr_arg args = {
2379 .bitmask = server->attr_bitmask,
2381 struct nfs4_getattr_res res = {
2385 struct rpc_message msg = {
2386 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2391 nfs_fattr_init(fattr);
2392 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2395 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2397 struct nfs4_exception exception = { };
2400 err = nfs4_handle_exception(server,
2401 _nfs4_proc_getattr(server, fhandle, fattr),
2403 } while (exception.retry);
2408 * The file is not closed if it is opened due to the a request to change
2409 * the size of the file. The open call will not be needed once the
2410 * VFS layer lookup-intents are implemented.
2412 * Close is called when the inode is destroyed.
2413 * If we haven't opened the file for O_WRONLY, we
2414 * need to in the size_change case to obtain a stateid.
2417 * Because OPEN is always done by name in nfsv4, it is
2418 * possible that we opened a different file by the same
2419 * name. We can recognize this race condition, but we
2420 * can't do anything about it besides returning an error.
2422 * This will be fixed with VFS changes (lookup-intent).
2425 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2426 struct iattr *sattr)
2428 struct inode *inode = dentry->d_inode;
2429 struct rpc_cred *cred = NULL;
2430 struct nfs4_state *state = NULL;
2433 if (pnfs_ld_layoutret_on_setattr(inode))
2434 pnfs_return_layout(inode);
2436 nfs_fattr_init(fattr);
2438 /* Search for an existing open(O_WRITE) file */
2439 if (sattr->ia_valid & ATTR_FILE) {
2440 struct nfs_open_context *ctx;
2442 ctx = nfs_file_open_context(sattr->ia_file);
2449 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2451 nfs_setattr_update_inode(inode, sattr);
2455 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2456 const struct qstr *name, struct nfs_fh *fhandle,
2457 struct nfs_fattr *fattr)
2459 struct nfs_server *server = NFS_SERVER(dir);
2461 struct nfs4_lookup_arg args = {
2462 .bitmask = server->attr_bitmask,
2463 .dir_fh = NFS_FH(dir),
2466 struct nfs4_lookup_res res = {
2471 struct rpc_message msg = {
2472 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2477 nfs_fattr_init(fattr);
2479 dprintk("NFS call lookup %s\n", name->name);
2480 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2481 dprintk("NFS reply lookup: %d\n", status);
2485 void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr, struct nfs_fh *fh)
2487 memset(fh, 0, sizeof(struct nfs_fh));
2488 fattr->fsid.major = 1;
2489 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2490 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_FSID | NFS_ATTR_FATTR_MOUNTPOINT;
2491 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2495 static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qstr *name,
2496 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2498 struct nfs4_exception exception = { };
2503 status = _nfs4_proc_lookup(clnt, dir, name, fhandle, fattr);
2505 case -NFS4ERR_BADNAME:
2507 case -NFS4ERR_MOVED:
2508 return nfs4_get_referral(dir, name, fattr, fhandle);
2509 case -NFS4ERR_WRONGSEC:
2510 nfs_fixup_secinfo_attributes(fattr, fhandle);
2512 err = nfs4_handle_exception(NFS_SERVER(dir),
2513 status, &exception);
2514 } while (exception.retry);
2518 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2520 struct nfs_server *server = NFS_SERVER(inode);
2521 struct nfs4_accessargs args = {
2522 .fh = NFS_FH(inode),
2523 .bitmask = server->attr_bitmask,
2525 struct nfs4_accessres res = {
2528 struct rpc_message msg = {
2529 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2532 .rpc_cred = entry->cred,
2534 int mode = entry->mask;
2538 * Determine which access bits we want to ask for...
2540 if (mode & MAY_READ)
2541 args.access |= NFS4_ACCESS_READ;
2542 if (S_ISDIR(inode->i_mode)) {
2543 if (mode & MAY_WRITE)
2544 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2545 if (mode & MAY_EXEC)
2546 args.access |= NFS4_ACCESS_LOOKUP;
2548 if (mode & MAY_WRITE)
2549 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2550 if (mode & MAY_EXEC)
2551 args.access |= NFS4_ACCESS_EXECUTE;
2554 res.fattr = nfs_alloc_fattr();
2555 if (res.fattr == NULL)
2558 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2561 if (res.access & NFS4_ACCESS_READ)
2562 entry->mask |= MAY_READ;
2563 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2564 entry->mask |= MAY_WRITE;
2565 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2566 entry->mask |= MAY_EXEC;
2567 nfs_refresh_inode(inode, res.fattr);
2569 nfs_free_fattr(res.fattr);
2573 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2575 struct nfs4_exception exception = { };
2578 err = nfs4_handle_exception(NFS_SERVER(inode),
2579 _nfs4_proc_access(inode, entry),
2581 } while (exception.retry);
2586 * TODO: For the time being, we don't try to get any attributes
2587 * along with any of the zero-copy operations READ, READDIR,
2590 * In the case of the first three, we want to put the GETATTR
2591 * after the read-type operation -- this is because it is hard
2592 * to predict the length of a GETATTR response in v4, and thus
2593 * align the READ data correctly. This means that the GETATTR
2594 * may end up partially falling into the page cache, and we should
2595 * shift it into the 'tail' of the xdr_buf before processing.
2596 * To do this efficiently, we need to know the total length
2597 * of data received, which doesn't seem to be available outside
2600 * In the case of WRITE, we also want to put the GETATTR after
2601 * the operation -- in this case because we want to make sure
2602 * we get the post-operation mtime and size. This means that
2603 * we can't use xdr_encode_pages() as written: we need a variant
2604 * of it which would leave room in the 'tail' iovec.
2606 * Both of these changes to the XDR layer would in fact be quite
2607 * minor, but I decided to leave them for a subsequent patch.
2609 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2610 unsigned int pgbase, unsigned int pglen)
2612 struct nfs4_readlink args = {
2613 .fh = NFS_FH(inode),
2618 struct nfs4_readlink_res res;
2619 struct rpc_message msg = {
2620 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2625 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2628 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2629 unsigned int pgbase, unsigned int pglen)
2631 struct nfs4_exception exception = { };
2634 err = nfs4_handle_exception(NFS_SERVER(inode),
2635 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2637 } while (exception.retry);
2643 * We will need to arrange for the VFS layer to provide an atomic open.
2644 * Until then, this create/open method is prone to inefficiency and race
2645 * conditions due to the lookup, create, and open VFS calls from sys_open()
2646 * placed on the wire.
2648 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2649 * The file will be opened again in the subsequent VFS open call
2650 * (nfs4_proc_file_open).
2652 * The open for read will just hang around to be used by any process that
2653 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2657 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2658 int flags, struct nfs_open_context *ctx)
2660 struct dentry *de = dentry;
2661 struct nfs4_state *state;
2662 struct rpc_cred *cred = NULL;
2671 sattr->ia_mode &= ~current_umask();
2672 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred);
2674 if (IS_ERR(state)) {
2675 status = PTR_ERR(state);
2678 d_add(dentry, igrab(state->inode));
2679 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2683 nfs4_close_sync(state, fmode);
2688 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2690 struct nfs_server *server = NFS_SERVER(dir);
2691 struct nfs_removeargs args = {
2693 .name.len = name->len,
2694 .name.name = name->name,
2695 .bitmask = server->attr_bitmask,
2697 struct nfs_removeres res = {
2700 struct rpc_message msg = {
2701 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2705 int status = -ENOMEM;
2707 res.dir_attr = nfs_alloc_fattr();
2708 if (res.dir_attr == NULL)
2711 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2713 update_changeattr(dir, &res.cinfo);
2714 nfs_post_op_update_inode(dir, res.dir_attr);
2716 nfs_free_fattr(res.dir_attr);
2721 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2723 struct nfs4_exception exception = { };
2726 err = nfs4_handle_exception(NFS_SERVER(dir),
2727 _nfs4_proc_remove(dir, name),
2729 } while (exception.retry);
2733 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2735 struct nfs_server *server = NFS_SERVER(dir);
2736 struct nfs_removeargs *args = msg->rpc_argp;
2737 struct nfs_removeres *res = msg->rpc_resp;
2739 args->bitmask = server->cache_consistency_bitmask;
2740 res->server = server;
2741 res->seq_res.sr_slot = NULL;
2742 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2745 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2747 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2749 if (!nfs4_sequence_done(task, &res->seq_res))
2751 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2753 update_changeattr(dir, &res->cinfo);
2754 nfs_post_op_update_inode(dir, res->dir_attr);
2758 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2760 struct nfs_server *server = NFS_SERVER(dir);
2761 struct nfs_renameargs *arg = msg->rpc_argp;
2762 struct nfs_renameres *res = msg->rpc_resp;
2764 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2765 arg->bitmask = server->attr_bitmask;
2766 res->server = server;
2769 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2770 struct inode *new_dir)
2772 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2774 if (!nfs4_sequence_done(task, &res->seq_res))
2776 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2779 update_changeattr(old_dir, &res->old_cinfo);
2780 nfs_post_op_update_inode(old_dir, res->old_fattr);
2781 update_changeattr(new_dir, &res->new_cinfo);
2782 nfs_post_op_update_inode(new_dir, res->new_fattr);
2786 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2787 struct inode *new_dir, struct qstr *new_name)
2789 struct nfs_server *server = NFS_SERVER(old_dir);
2790 struct nfs_renameargs arg = {
2791 .old_dir = NFS_FH(old_dir),
2792 .new_dir = NFS_FH(new_dir),
2793 .old_name = old_name,
2794 .new_name = new_name,
2795 .bitmask = server->attr_bitmask,
2797 struct nfs_renameres res = {
2800 struct rpc_message msg = {
2801 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2805 int status = -ENOMEM;
2807 res.old_fattr = nfs_alloc_fattr();
2808 res.new_fattr = nfs_alloc_fattr();
2809 if (res.old_fattr == NULL || res.new_fattr == NULL)
2812 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2814 update_changeattr(old_dir, &res.old_cinfo);
2815 nfs_post_op_update_inode(old_dir, res.old_fattr);
2816 update_changeattr(new_dir, &res.new_cinfo);
2817 nfs_post_op_update_inode(new_dir, res.new_fattr);
2820 nfs_free_fattr(res.new_fattr);
2821 nfs_free_fattr(res.old_fattr);
2825 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2826 struct inode *new_dir, struct qstr *new_name)
2828 struct nfs4_exception exception = { };
2831 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2832 _nfs4_proc_rename(old_dir, old_name,
2835 } while (exception.retry);
2839 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2841 struct nfs_server *server = NFS_SERVER(inode);
2842 struct nfs4_link_arg arg = {
2843 .fh = NFS_FH(inode),
2844 .dir_fh = NFS_FH(dir),
2846 .bitmask = server->attr_bitmask,
2848 struct nfs4_link_res res = {
2851 struct rpc_message msg = {
2852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2856 int status = -ENOMEM;
2858 res.fattr = nfs_alloc_fattr();
2859 res.dir_attr = nfs_alloc_fattr();
2860 if (res.fattr == NULL || res.dir_attr == NULL)
2863 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2865 update_changeattr(dir, &res.cinfo);
2866 nfs_post_op_update_inode(dir, res.dir_attr);
2867 nfs_post_op_update_inode(inode, res.fattr);
2870 nfs_free_fattr(res.dir_attr);
2871 nfs_free_fattr(res.fattr);
2875 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2877 struct nfs4_exception exception = { };
2880 err = nfs4_handle_exception(NFS_SERVER(inode),
2881 _nfs4_proc_link(inode, dir, name),
2883 } while (exception.retry);
2887 struct nfs4_createdata {
2888 struct rpc_message msg;
2889 struct nfs4_create_arg arg;
2890 struct nfs4_create_res res;
2892 struct nfs_fattr fattr;
2893 struct nfs_fattr dir_fattr;
2896 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2897 struct qstr *name, struct iattr *sattr, u32 ftype)
2899 struct nfs4_createdata *data;
2901 data = kzalloc(sizeof(*data), GFP_KERNEL);
2903 struct nfs_server *server = NFS_SERVER(dir);
2905 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2906 data->msg.rpc_argp = &data->arg;
2907 data->msg.rpc_resp = &data->res;
2908 data->arg.dir_fh = NFS_FH(dir);
2909 data->arg.server = server;
2910 data->arg.name = name;
2911 data->arg.attrs = sattr;
2912 data->arg.ftype = ftype;
2913 data->arg.bitmask = server->attr_bitmask;
2914 data->res.server = server;
2915 data->res.fh = &data->fh;
2916 data->res.fattr = &data->fattr;
2917 data->res.dir_fattr = &data->dir_fattr;
2918 nfs_fattr_init(data->res.fattr);
2919 nfs_fattr_init(data->res.dir_fattr);
2924 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2926 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
2927 &data->arg.seq_args, &data->res.seq_res, 1);
2929 update_changeattr(dir, &data->res.dir_cinfo);
2930 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2931 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2936 static void nfs4_free_createdata(struct nfs4_createdata *data)
2941 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2942 struct page *page, unsigned int len, struct iattr *sattr)
2944 struct nfs4_createdata *data;
2945 int status = -ENAMETOOLONG;
2947 if (len > NFS4_MAXPATHLEN)
2951 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2955 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2956 data->arg.u.symlink.pages = &page;
2957 data->arg.u.symlink.len = len;
2959 status = nfs4_do_create(dir, dentry, data);
2961 nfs4_free_createdata(data);
2966 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2967 struct page *page, unsigned int len, struct iattr *sattr)
2969 struct nfs4_exception exception = { };
2972 err = nfs4_handle_exception(NFS_SERVER(dir),
2973 _nfs4_proc_symlink(dir, dentry, page,
2976 } while (exception.retry);
2980 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2981 struct iattr *sattr)
2983 struct nfs4_createdata *data;
2984 int status = -ENOMEM;
2986 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2990 status = nfs4_do_create(dir, dentry, data);
2992 nfs4_free_createdata(data);
2997 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2998 struct iattr *sattr)
3000 struct nfs4_exception exception = { };
3003 sattr->ia_mode &= ~current_umask();
3005 err = nfs4_handle_exception(NFS_SERVER(dir),
3006 _nfs4_proc_mkdir(dir, dentry, sattr),
3008 } while (exception.retry);
3012 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3013 u64 cookie, struct page **pages, unsigned int count, int plus)
3015 struct inode *dir = dentry->d_inode;
3016 struct nfs4_readdir_arg args = {
3021 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3024 struct nfs4_readdir_res res;
3025 struct rpc_message msg = {
3026 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3033 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3034 dentry->d_parent->d_name.name,
3035 dentry->d_name.name,
3036 (unsigned long long)cookie);
3037 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3038 res.pgbase = args.pgbase;
3039 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3041 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3042 status += args.pgbase;
3045 nfs_invalidate_atime(dir);
3047 dprintk("%s: returns %d\n", __func__, status);
3051 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3052 u64 cookie, struct page **pages, unsigned int count, int plus)
3054 struct nfs4_exception exception = { };
3057 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3058 _nfs4_proc_readdir(dentry, cred, cookie,
3059 pages, count, plus),
3061 } while (exception.retry);
3065 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3066 struct iattr *sattr, dev_t rdev)
3068 struct nfs4_createdata *data;
3069 int mode = sattr->ia_mode;
3070 int status = -ENOMEM;
3072 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3073 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3075 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3080 data->arg.ftype = NF4FIFO;
3081 else if (S_ISBLK(mode)) {
3082 data->arg.ftype = NF4BLK;
3083 data->arg.u.device.specdata1 = MAJOR(rdev);
3084 data->arg.u.device.specdata2 = MINOR(rdev);
3086 else if (S_ISCHR(mode)) {
3087 data->arg.ftype = NF4CHR;
3088 data->arg.u.device.specdata1 = MAJOR(rdev);
3089 data->arg.u.device.specdata2 = MINOR(rdev);
3092 status = nfs4_do_create(dir, dentry, data);
3094 nfs4_free_createdata(data);
3099 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3100 struct iattr *sattr, dev_t rdev)
3102 struct nfs4_exception exception = { };
3105 sattr->ia_mode &= ~current_umask();
3107 err = nfs4_handle_exception(NFS_SERVER(dir),
3108 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3110 } while (exception.retry);
3114 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3115 struct nfs_fsstat *fsstat)
3117 struct nfs4_statfs_arg args = {
3119 .bitmask = server->attr_bitmask,
3121 struct nfs4_statfs_res res = {
3124 struct rpc_message msg = {
3125 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3130 nfs_fattr_init(fsstat->fattr);
3131 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3134 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3136 struct nfs4_exception exception = { };
3139 err = nfs4_handle_exception(server,
3140 _nfs4_proc_statfs(server, fhandle, fsstat),
3142 } while (exception.retry);
3146 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3147 struct nfs_fsinfo *fsinfo)
3149 struct nfs4_fsinfo_arg args = {
3151 .bitmask = server->attr_bitmask,
3153 struct nfs4_fsinfo_res res = {
3156 struct rpc_message msg = {
3157 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3162 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3165 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3167 struct nfs4_exception exception = { };
3171 err = nfs4_handle_exception(server,
3172 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3174 } while (exception.retry);
3178 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3180 nfs_fattr_init(fsinfo->fattr);
3181 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3184 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3185 struct nfs_pathconf *pathconf)
3187 struct nfs4_pathconf_arg args = {
3189 .bitmask = server->attr_bitmask,
3191 struct nfs4_pathconf_res res = {
3192 .pathconf = pathconf,
3194 struct rpc_message msg = {
3195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3200 /* None of the pathconf attributes are mandatory to implement */
3201 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3202 memset(pathconf, 0, sizeof(*pathconf));
3206 nfs_fattr_init(pathconf->fattr);
3207 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3210 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3211 struct nfs_pathconf *pathconf)
3213 struct nfs4_exception exception = { };
3217 err = nfs4_handle_exception(server,
3218 _nfs4_proc_pathconf(server, fhandle, pathconf),
3220 } while (exception.retry);
3224 void __nfs4_read_done_cb(struct nfs_read_data *data)
3226 nfs_invalidate_atime(data->inode);
3229 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3231 struct nfs_server *server = NFS_SERVER(data->inode);
3233 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3234 rpc_restart_call_prepare(task);
3238 __nfs4_read_done_cb(data);
3239 if (task->tk_status > 0)
3240 renew_lease(server, data->timestamp);
3244 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3247 dprintk("--> %s\n", __func__);
3249 if (!nfs4_sequence_done(task, &data->res.seq_res))
3252 return data->read_done_cb ? data->read_done_cb(task, data) :
3253 nfs4_read_done_cb(task, data);
3256 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3258 data->timestamp = jiffies;
3259 data->read_done_cb = nfs4_read_done_cb;
3260 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3263 /* Reset the the nfs_read_data to send the read to the MDS. */
3264 void nfs4_reset_read(struct rpc_task *task, struct nfs_read_data *data)
3266 dprintk("%s Reset task for i/o through\n", __func__);
3267 put_lseg(data->lseg);
3269 /* offsets will differ in the dense stripe case */
3270 data->args.offset = data->mds_offset;
3271 data->ds_clp = NULL;
3272 data->args.fh = NFS_FH(data->inode);
3273 data->read_done_cb = nfs4_read_done_cb;
3274 task->tk_ops = data->mds_ops;
3275 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3277 EXPORT_SYMBOL_GPL(nfs4_reset_read);
3279 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3281 struct inode *inode = data->inode;
3283 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3284 rpc_restart_call_prepare(task);
3287 if (task->tk_status >= 0) {
3288 renew_lease(NFS_SERVER(inode), data->timestamp);
3289 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3294 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3296 if (!nfs4_sequence_done(task, &data->res.seq_res))
3298 return data->write_done_cb ? data->write_done_cb(task, data) :
3299 nfs4_write_done_cb(task, data);
3302 /* Reset the the nfs_write_data to send the write to the MDS. */
3303 void nfs4_reset_write(struct rpc_task *task, struct nfs_write_data *data)
3305 dprintk("%s Reset task for i/o through\n", __func__);
3306 put_lseg(data->lseg);
3308 data->ds_clp = NULL;
3309 data->write_done_cb = nfs4_write_done_cb;
3310 data->args.fh = NFS_FH(data->inode);
3311 data->args.bitmask = data->res.server->cache_consistency_bitmask;
3312 data->args.offset = data->mds_offset;
3313 data->res.fattr = &data->fattr;
3314 task->tk_ops = data->mds_ops;
3315 rpc_task_reset_client(task, NFS_CLIENT(data->inode));
3317 EXPORT_SYMBOL_GPL(nfs4_reset_write);
3319 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3321 struct nfs_server *server = NFS_SERVER(data->inode);
3324 data->args.bitmask = NULL;
3325 data->res.fattr = NULL;
3327 data->args.bitmask = server->cache_consistency_bitmask;
3328 if (!data->write_done_cb)
3329 data->write_done_cb = nfs4_write_done_cb;
3330 data->res.server = server;
3331 data->timestamp = jiffies;
3333 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3336 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3338 struct inode *inode = data->inode;
3340 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3341 rpc_restart_call_prepare(task);
3344 nfs_refresh_inode(inode, data->res.fattr);
3348 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3350 if (!nfs4_sequence_done(task, &data->res.seq_res))
3352 return data->write_done_cb(task, data);
3355 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3357 struct nfs_server *server = NFS_SERVER(data->inode);
3360 data->args.bitmask = NULL;
3361 data->res.fattr = NULL;
3363 data->args.bitmask = server->cache_consistency_bitmask;
3364 if (!data->write_done_cb)
3365 data->write_done_cb = nfs4_commit_done_cb;
3366 data->res.server = server;
3367 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3370 struct nfs4_renewdata {
3371 struct nfs_client *client;
3372 unsigned long timestamp;
3376 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3377 * standalone procedure for queueing an asynchronous RENEW.
3379 static void nfs4_renew_release(void *calldata)
3381 struct nfs4_renewdata *data = calldata;
3382 struct nfs_client *clp = data->client;
3384 if (atomic_read(&clp->cl_count) > 1)
3385 nfs4_schedule_state_renewal(clp);
3386 nfs_put_client(clp);
3390 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3392 struct nfs4_renewdata *data = calldata;
3393 struct nfs_client *clp = data->client;
3394 unsigned long timestamp = data->timestamp;
3396 if (task->tk_status < 0) {
3397 /* Unless we're shutting down, schedule state recovery! */
3398 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3400 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3401 nfs4_schedule_lease_recovery(clp);
3404 nfs4_schedule_path_down_recovery(clp);
3406 do_renew_lease(clp, timestamp);
3409 static const struct rpc_call_ops nfs4_renew_ops = {
3410 .rpc_call_done = nfs4_renew_done,
3411 .rpc_release = nfs4_renew_release,
3414 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3416 struct rpc_message msg = {
3417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3421 struct nfs4_renewdata *data;
3423 if (renew_flags == 0)
3425 if (!atomic_inc_not_zero(&clp->cl_count))
3427 data = kmalloc(sizeof(*data), GFP_NOFS);
3431 data->timestamp = jiffies;
3432 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3433 &nfs4_renew_ops, data);
3436 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3438 struct rpc_message msg = {
3439 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3443 unsigned long now = jiffies;
3446 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3449 do_renew_lease(clp, now);
3453 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3455 return (server->caps & NFS_CAP_ACLS)
3456 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3457 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3460 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3461 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3464 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3466 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3467 struct page **pages, unsigned int *pgbase)
3469 struct page *newpage, **spages;
3475 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3476 newpage = alloc_page(GFP_KERNEL);
3478 if (newpage == NULL)
3480 memcpy(page_address(newpage), buf, len);
3485 } while (buflen != 0);
3491 __free_page(spages[rc-1]);
3495 struct nfs4_cached_acl {
3501 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3503 struct nfs_inode *nfsi = NFS_I(inode);
3505 spin_lock(&inode->i_lock);
3506 kfree(nfsi->nfs4_acl);
3507 nfsi->nfs4_acl = acl;
3508 spin_unlock(&inode->i_lock);
3511 static void nfs4_zap_acl_attr(struct inode *inode)
3513 nfs4_set_cached_acl(inode, NULL);
3516 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3518 struct nfs_inode *nfsi = NFS_I(inode);
3519 struct nfs4_cached_acl *acl;
3522 spin_lock(&inode->i_lock);
3523 acl = nfsi->nfs4_acl;
3526 if (buf == NULL) /* user is just asking for length */
3528 if (acl->cached == 0)
3530 ret = -ERANGE; /* see getxattr(2) man page */
3531 if (acl->len > buflen)
3533 memcpy(buf, acl->data, acl->len);
3537 spin_unlock(&inode->i_lock);
3541 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3543 struct nfs4_cached_acl *acl;
3545 if (pages && acl_len <= PAGE_SIZE) {
3546 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3550 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3552 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3559 nfs4_set_cached_acl(inode, acl);
3563 * The getxattr API returns the required buffer length when called with a
3564 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3565 * the required buf. On a NULL buf, we send a page of data to the server
3566 * guessing that the ACL request can be serviced by a page. If so, we cache
3567 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3568 * the cache. If not so, we throw away the page, and cache the required
3569 * length. The next getxattr call will then produce another round trip to
3570 * the server, this time with the input buf of the required size.
3572 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3574 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3575 struct nfs_getaclargs args = {
3576 .fh = NFS_FH(inode),
3580 struct nfs_getaclres res = {
3583 struct rpc_message msg = {
3584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3588 int ret = -ENOMEM, npages, i;
3591 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3592 /* As long as we're doing a round trip to the server anyway,
3593 * let's be prepared for a page of acl data. */
3597 /* Add an extra page to handle the bitmap returned */
3600 for (i = 0; i < npages; i++) {
3601 pages[i] = alloc_page(GFP_KERNEL);
3606 /* for decoding across pages */
3607 res.acl_scratch = alloc_page(GFP_KERNEL);
3608 if (!res.acl_scratch)
3611 args.acl_len = npages * PAGE_SIZE;
3612 args.acl_pgbase = 0;
3614 /* Let decode_getfacl know not to fail if the ACL data is larger than
3615 * the page we send as a guess */
3617 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3619 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3620 __func__, buf, buflen, npages, args.acl_len);
3621 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3622 &msg, &args.seq_args, &res.seq_res, 0);
3626 acl_len = res.acl_len - res.acl_data_offset;
3627 if (acl_len > args.acl_len)
3628 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
3630 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
3634 if (acl_len > buflen)
3636 _copy_from_pages(buf, pages, res.acl_data_offset,
3641 for (i = 0; i < npages; i++)
3643 __free_page(pages[i]);
3644 if (res.acl_scratch)
3645 __free_page(res.acl_scratch);
3649 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3651 struct nfs4_exception exception = { };
3654 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3657 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3658 } while (exception.retry);
3662 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3664 struct nfs_server *server = NFS_SERVER(inode);
3667 if (!nfs4_server_supports_acls(server))
3669 ret = nfs_revalidate_inode(server, inode);
3672 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3673 nfs_zap_acl_cache(inode);
3674 ret = nfs4_read_cached_acl(inode, buf, buflen);
3676 /* -ENOENT is returned if there is no ACL or if there is an ACL
3677 * but no cached acl data, just the acl length */
3679 return nfs4_get_acl_uncached(inode, buf, buflen);
3682 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3684 struct nfs_server *server = NFS_SERVER(inode);
3685 struct page *pages[NFS4ACL_MAXPAGES];
3686 struct nfs_setaclargs arg = {
3687 .fh = NFS_FH(inode),
3691 struct nfs_setaclres res;
3692 struct rpc_message msg = {
3693 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3699 if (!nfs4_server_supports_acls(server))
3701 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3704 nfs_inode_return_delegation(inode);
3705 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3708 * Free each page after tx, so the only ref left is
3709 * held by the network stack
3712 put_page(pages[i-1]);
3715 * Acl update can result in inode attribute update.
3716 * so mark the attribute cache invalid.
3718 spin_lock(&inode->i_lock);
3719 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3720 spin_unlock(&inode->i_lock);
3721 nfs_access_zap_cache(inode);
3722 nfs_zap_acl_cache(inode);
3726 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3728 struct nfs4_exception exception = { };
3731 err = nfs4_handle_exception(NFS_SERVER(inode),
3732 __nfs4_proc_set_acl(inode, buf, buflen),
3734 } while (exception.retry);
3739 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3741 struct nfs_client *clp = server->nfs_client;
3743 if (task->tk_status >= 0)
3745 switch(task->tk_status) {
3746 case -NFS4ERR_DELEG_REVOKED:
3747 case -NFS4ERR_ADMIN_REVOKED:
3748 case -NFS4ERR_BAD_STATEID:
3750 nfs_remove_bad_delegation(state->inode);
3751 case -NFS4ERR_OPENMODE:
3754 nfs4_schedule_stateid_recovery(server, state);
3755 goto wait_on_recovery;
3756 case -NFS4ERR_EXPIRED:
3758 nfs4_schedule_stateid_recovery(server, state);
3759 case -NFS4ERR_STALE_STATEID:
3760 case -NFS4ERR_STALE_CLIENTID:
3761 nfs4_schedule_lease_recovery(clp);
3762 goto wait_on_recovery;
3763 #if defined(CONFIG_NFS_V4_1)
3764 case -NFS4ERR_BADSESSION:
3765 case -NFS4ERR_BADSLOT:
3766 case -NFS4ERR_BAD_HIGH_SLOT:
3767 case -NFS4ERR_DEADSESSION:
3768 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3769 case -NFS4ERR_SEQ_FALSE_RETRY:
3770 case -NFS4ERR_SEQ_MISORDERED:
3771 dprintk("%s ERROR %d, Reset session\n", __func__,
3773 nfs4_schedule_session_recovery(clp->cl_session);
3774 goto wait_on_recovery;
3775 #endif /* CONFIG_NFS_V4_1 */
3776 case -NFS4ERR_DELAY:
3777 nfs_inc_server_stats(server, NFSIOS_DELAY);
3778 case -NFS4ERR_GRACE:
3780 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3781 task->tk_status = 0;
3783 case -NFS4ERR_RETRY_UNCACHED_REP:
3784 case -NFS4ERR_OLD_STATEID:
3785 task->tk_status = 0;
3788 task->tk_status = nfs4_map_errors(task->tk_status);
3791 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3792 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3793 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3794 task->tk_status = 0;
3798 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3799 unsigned short port, struct rpc_cred *cred,
3800 struct nfs4_setclientid_res *res)
3802 nfs4_verifier sc_verifier;
3803 struct nfs4_setclientid setclientid = {
3804 .sc_verifier = &sc_verifier,
3806 .sc_cb_ident = clp->cl_cb_ident,
3808 struct rpc_message msg = {
3809 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3810 .rpc_argp = &setclientid,
3818 p = (__be32*)sc_verifier.data;
3819 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3820 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3823 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3824 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3826 rpc_peeraddr2str(clp->cl_rpcclient,
3828 rpc_peeraddr2str(clp->cl_rpcclient,
3830 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3831 clp->cl_id_uniquifier);
3832 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3833 sizeof(setclientid.sc_netid),
3834 rpc_peeraddr2str(clp->cl_rpcclient,
3835 RPC_DISPLAY_NETID));
3836 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3837 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3838 clp->cl_ipaddr, port >> 8, port & 255);
3840 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3841 if (status != -NFS4ERR_CLID_INUSE)
3844 ++clp->cl_id_uniquifier;
3848 ssleep(clp->cl_lease_time / HZ + 1);
3853 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3854 struct nfs4_setclientid_res *arg,
3855 struct rpc_cred *cred)
3857 struct nfs_fsinfo fsinfo;
3858 struct rpc_message msg = {
3859 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3861 .rpc_resp = &fsinfo,
3868 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3870 spin_lock(&clp->cl_lock);
3871 clp->cl_lease_time = fsinfo.lease_time * HZ;
3872 clp->cl_last_renewal = now;
3873 spin_unlock(&clp->cl_lock);
3878 struct nfs4_delegreturndata {
3879 struct nfs4_delegreturnargs args;
3880 struct nfs4_delegreturnres res;
3882 nfs4_stateid stateid;
3883 unsigned long timestamp;
3884 struct nfs_fattr fattr;
3888 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3890 struct nfs4_delegreturndata *data = calldata;
3892 if (!nfs4_sequence_done(task, &data->res.seq_res))
3895 switch (task->tk_status) {
3897 renew_lease(data->res.server, data->timestamp);
3899 case -NFS4ERR_ADMIN_REVOKED:
3900 case -NFS4ERR_DELEG_REVOKED:
3901 case -NFS4ERR_BAD_STATEID:
3902 case -NFS4ERR_OLD_STATEID:
3903 case -NFS4ERR_STALE_STATEID:
3904 case -NFS4ERR_EXPIRED:
3905 task->tk_status = 0;
3908 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3910 rpc_restart_call_prepare(task);
3914 data->rpc_status = task->tk_status;
3917 static void nfs4_delegreturn_release(void *calldata)
3922 #if defined(CONFIG_NFS_V4_1)
3923 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3925 struct nfs4_delegreturndata *d_data;
3927 d_data = (struct nfs4_delegreturndata *)data;
3929 if (nfs4_setup_sequence(d_data->res.server,
3930 &d_data->args.seq_args,
3931 &d_data->res.seq_res, 1, task))
3933 rpc_call_start(task);
3935 #endif /* CONFIG_NFS_V4_1 */
3937 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3938 #if defined(CONFIG_NFS_V4_1)
3939 .rpc_call_prepare = nfs4_delegreturn_prepare,
3940 #endif /* CONFIG_NFS_V4_1 */
3941 .rpc_call_done = nfs4_delegreturn_done,
3942 .rpc_release = nfs4_delegreturn_release,
3945 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3947 struct nfs4_delegreturndata *data;
3948 struct nfs_server *server = NFS_SERVER(inode);
3949 struct rpc_task *task;
3950 struct rpc_message msg = {
3951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3954 struct rpc_task_setup task_setup_data = {
3955 .rpc_client = server->client,
3956 .rpc_message = &msg,
3957 .callback_ops = &nfs4_delegreturn_ops,
3958 .flags = RPC_TASK_ASYNC,
3962 data = kzalloc(sizeof(*data), GFP_NOFS);
3965 data->args.fhandle = &data->fh;
3966 data->args.stateid = &data->stateid;
3967 data->args.bitmask = server->attr_bitmask;
3968 nfs_copy_fh(&data->fh, NFS_FH(inode));
3969 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3970 data->res.fattr = &data->fattr;
3971 data->res.server = server;
3972 nfs_fattr_init(data->res.fattr);
3973 data->timestamp = jiffies;
3974 data->rpc_status = 0;
3976 task_setup_data.callback_data = data;
3977 msg.rpc_argp = &data->args;
3978 msg.rpc_resp = &data->res;
3979 task = rpc_run_task(&task_setup_data);
3981 return PTR_ERR(task);
3984 status = nfs4_wait_for_completion_rpc_task(task);
3987 status = data->rpc_status;
3990 nfs_refresh_inode(inode, &data->fattr);
3996 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3998 struct nfs_server *server = NFS_SERVER(inode);
3999 struct nfs4_exception exception = { };
4002 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4004 case -NFS4ERR_STALE_STATEID:
4005 case -NFS4ERR_EXPIRED:
4009 err = nfs4_handle_exception(server, err, &exception);
4010 } while (exception.retry);
4014 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4015 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4018 * sleep, with exponential backoff, and retry the LOCK operation.
4020 static unsigned long
4021 nfs4_set_lock_task_retry(unsigned long timeout)
4023 schedule_timeout_killable(timeout);
4025 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4026 return NFS4_LOCK_MAXTIMEOUT;
4030 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4032 struct inode *inode = state->inode;
4033 struct nfs_server *server = NFS_SERVER(inode);
4034 struct nfs_client *clp = server->nfs_client;
4035 struct nfs_lockt_args arg = {
4036 .fh = NFS_FH(inode),
4039 struct nfs_lockt_res res = {
4042 struct rpc_message msg = {
4043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4046 .rpc_cred = state->owner->so_cred,
4048 struct nfs4_lock_state *lsp;
4051 arg.lock_owner.clientid = clp->cl_clientid;
4052 status = nfs4_set_lock_state(state, request);
4055 lsp = request->fl_u.nfs4_fl.owner;
4056 arg.lock_owner.id = lsp->ls_id.id;
4057 arg.lock_owner.s_dev = server->s_dev;
4058 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4061 request->fl_type = F_UNLCK;
4063 case -NFS4ERR_DENIED:
4066 request->fl_ops->fl_release_private(request);
4067 request->fl_ops = NULL;
4072 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4074 struct nfs4_exception exception = { };
4078 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4079 _nfs4_proc_getlk(state, cmd, request),
4081 } while (exception.retry);
4085 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4088 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4090 res = posix_lock_file_wait(file, fl);
4093 res = flock_lock_file_wait(file, fl);
4101 struct nfs4_unlockdata {
4102 struct nfs_locku_args arg;
4103 struct nfs_locku_res res;
4104 struct nfs4_lock_state *lsp;
4105 struct nfs_open_context *ctx;
4106 struct file_lock fl;
4107 const struct nfs_server *server;
4108 unsigned long timestamp;
4111 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4112 struct nfs_open_context *ctx,
4113 struct nfs4_lock_state *lsp,
4114 struct nfs_seqid *seqid)
4116 struct nfs4_unlockdata *p;
4117 struct inode *inode = lsp->ls_state->inode;
4119 p = kzalloc(sizeof(*p), GFP_NOFS);
4122 p->arg.fh = NFS_FH(inode);
4124 p->arg.seqid = seqid;
4125 p->res.seqid = seqid;
4126 p->arg.stateid = &lsp->ls_stateid;
4128 atomic_inc(&lsp->ls_count);
4129 /* Ensure we don't close file until we're done freeing locks! */
4130 p->ctx = get_nfs_open_context(ctx);
4131 memcpy(&p->fl, fl, sizeof(p->fl));
4132 p->server = NFS_SERVER(inode);
4136 static void nfs4_locku_release_calldata(void *data)
4138 struct nfs4_unlockdata *calldata = data;
4139 nfs_free_seqid(calldata->arg.seqid);
4140 nfs4_put_lock_state(calldata->lsp);
4141 put_nfs_open_context(calldata->ctx);
4145 static void nfs4_locku_done(struct rpc_task *task, void *data)
4147 struct nfs4_unlockdata *calldata = data;
4149 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4151 switch (task->tk_status) {
4153 memcpy(calldata->lsp->ls_stateid.data,
4154 calldata->res.stateid.data,
4155 sizeof(calldata->lsp->ls_stateid.data));
4156 renew_lease(calldata->server, calldata->timestamp);
4158 case -NFS4ERR_BAD_STATEID:
4159 case -NFS4ERR_OLD_STATEID:
4160 case -NFS4ERR_STALE_STATEID:
4161 case -NFS4ERR_EXPIRED:
4164 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4165 rpc_restart_call_prepare(task);
4167 nfs_release_seqid(calldata->arg.seqid);
4170 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4172 struct nfs4_unlockdata *calldata = data;
4174 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4176 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4177 /* Note: exit _without_ running nfs4_locku_done */
4178 task->tk_action = NULL;
4181 calldata->timestamp = jiffies;
4182 if (nfs4_setup_sequence(calldata->server,
4183 &calldata->arg.seq_args,
4184 &calldata->res.seq_res,
4186 nfs_release_seqid(calldata->arg.seqid);
4188 rpc_call_start(task);
4191 static const struct rpc_call_ops nfs4_locku_ops = {
4192 .rpc_call_prepare = nfs4_locku_prepare,
4193 .rpc_call_done = nfs4_locku_done,
4194 .rpc_release = nfs4_locku_release_calldata,
4197 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4198 struct nfs_open_context *ctx,
4199 struct nfs4_lock_state *lsp,
4200 struct nfs_seqid *seqid)
4202 struct nfs4_unlockdata *data;
4203 struct rpc_message msg = {
4204 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4205 .rpc_cred = ctx->cred,
4207 struct rpc_task_setup task_setup_data = {
4208 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4209 .rpc_message = &msg,
4210 .callback_ops = &nfs4_locku_ops,
4211 .workqueue = nfsiod_workqueue,
4212 .flags = RPC_TASK_ASYNC,
4215 /* Ensure this is an unlock - when canceling a lock, the
4216 * canceled lock is passed in, and it won't be an unlock.
4218 fl->fl_type = F_UNLCK;
4220 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4222 nfs_free_seqid(seqid);
4223 return ERR_PTR(-ENOMEM);
4226 msg.rpc_argp = &data->arg;
4227 msg.rpc_resp = &data->res;
4228 task_setup_data.callback_data = data;
4229 return rpc_run_task(&task_setup_data);
4232 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4234 struct nfs_inode *nfsi = NFS_I(state->inode);
4235 struct nfs_seqid *seqid;
4236 struct nfs4_lock_state *lsp;
4237 struct rpc_task *task;
4239 unsigned char fl_flags = request->fl_flags;
4241 status = nfs4_set_lock_state(state, request);
4242 /* Unlock _before_ we do the RPC call */
4243 request->fl_flags |= FL_EXISTS;
4244 down_read(&nfsi->rwsem);
4245 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4246 up_read(&nfsi->rwsem);
4249 up_read(&nfsi->rwsem);
4252 /* Is this a delegated lock? */
4253 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4255 lsp = request->fl_u.nfs4_fl.owner;
4256 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4260 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4261 status = PTR_ERR(task);
4264 status = nfs4_wait_for_completion_rpc_task(task);
4267 request->fl_flags = fl_flags;
4271 struct nfs4_lockdata {
4272 struct nfs_lock_args arg;
4273 struct nfs_lock_res res;
4274 struct nfs4_lock_state *lsp;
4275 struct nfs_open_context *ctx;
4276 struct file_lock fl;
4277 unsigned long timestamp;
4280 struct nfs_server *server;
4283 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4284 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4287 struct nfs4_lockdata *p;
4288 struct inode *inode = lsp->ls_state->inode;
4289 struct nfs_server *server = NFS_SERVER(inode);
4291 p = kzalloc(sizeof(*p), gfp_mask);
4295 p->arg.fh = NFS_FH(inode);
4297 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4298 if (p->arg.open_seqid == NULL)
4300 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4301 if (p->arg.lock_seqid == NULL)
4302 goto out_free_seqid;
4303 p->arg.lock_stateid = &lsp->ls_stateid;
4304 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4305 p->arg.lock_owner.id = lsp->ls_id.id;
4306 p->arg.lock_owner.s_dev = server->s_dev;
4307 p->res.lock_seqid = p->arg.lock_seqid;
4310 atomic_inc(&lsp->ls_count);
4311 p->ctx = get_nfs_open_context(ctx);
4312 memcpy(&p->fl, fl, sizeof(p->fl));
4315 nfs_free_seqid(p->arg.open_seqid);
4321 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4323 struct nfs4_lockdata *data = calldata;
4324 struct nfs4_state *state = data->lsp->ls_state;
4326 dprintk("%s: begin!\n", __func__);
4327 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4329 /* Do we need to do an open_to_lock_owner? */
4330 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4331 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4332 goto out_release_lock_seqid;
4333 data->arg.open_stateid = &state->stateid;
4334 data->arg.new_lock_owner = 1;
4335 data->res.open_seqid = data->arg.open_seqid;
4337 data->arg.new_lock_owner = 0;
4338 data->timestamp = jiffies;
4339 if (nfs4_setup_sequence(data->server,
4340 &data->arg.seq_args,
4343 rpc_call_start(task);
4346 nfs_release_seqid(data->arg.open_seqid);
4347 out_release_lock_seqid:
4348 nfs_release_seqid(data->arg.lock_seqid);
4349 dprintk("%s: done!, ret = %d\n", __func__, task->tk_status);
4352 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4354 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4355 nfs4_lock_prepare(task, calldata);
4358 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4360 struct nfs4_lockdata *data = calldata;
4362 dprintk("%s: begin!\n", __func__);
4364 if (!nfs4_sequence_done(task, &data->res.seq_res))
4367 data->rpc_status = task->tk_status;
4368 if (data->arg.new_lock_owner != 0) {
4369 if (data->rpc_status == 0)
4370 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4374 if (data->rpc_status == 0) {
4375 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4376 sizeof(data->lsp->ls_stateid.data));
4377 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4378 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4381 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4384 static void nfs4_lock_release(void *calldata)
4386 struct nfs4_lockdata *data = calldata;
4388 dprintk("%s: begin!\n", __func__);
4389 nfs_free_seqid(data->arg.open_seqid);
4390 if (data->cancelled != 0) {
4391 struct rpc_task *task;
4392 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4393 data->arg.lock_seqid);
4395 rpc_put_task_async(task);
4396 dprintk("%s: cancelling lock!\n", __func__);
4398 nfs_free_seqid(data->arg.lock_seqid);
4399 nfs4_put_lock_state(data->lsp);
4400 put_nfs_open_context(data->ctx);
4402 dprintk("%s: done!\n", __func__);
4405 static const struct rpc_call_ops nfs4_lock_ops = {
4406 .rpc_call_prepare = nfs4_lock_prepare,
4407 .rpc_call_done = nfs4_lock_done,
4408 .rpc_release = nfs4_lock_release,
4411 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4412 .rpc_call_prepare = nfs4_recover_lock_prepare,
4413 .rpc_call_done = nfs4_lock_done,
4414 .rpc_release = nfs4_lock_release,
4417 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4420 case -NFS4ERR_ADMIN_REVOKED:
4421 case -NFS4ERR_BAD_STATEID:
4422 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4423 if (new_lock_owner != 0 ||
4424 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4425 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4427 case -NFS4ERR_STALE_STATEID:
4428 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4429 case -NFS4ERR_EXPIRED:
4430 nfs4_schedule_lease_recovery(server->nfs_client);
4434 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4436 struct nfs4_lockdata *data;
4437 struct rpc_task *task;
4438 struct rpc_message msg = {
4439 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4440 .rpc_cred = state->owner->so_cred,
4442 struct rpc_task_setup task_setup_data = {
4443 .rpc_client = NFS_CLIENT(state->inode),
4444 .rpc_message = &msg,
4445 .callback_ops = &nfs4_lock_ops,
4446 .workqueue = nfsiod_workqueue,
4447 .flags = RPC_TASK_ASYNC,
4451 dprintk("%s: begin!\n", __func__);
4452 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4453 fl->fl_u.nfs4_fl.owner,
4454 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4458 data->arg.block = 1;
4459 if (recovery_type > NFS_LOCK_NEW) {
4460 if (recovery_type == NFS_LOCK_RECLAIM)
4461 data->arg.reclaim = NFS_LOCK_RECLAIM;
4462 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4464 msg.rpc_argp = &data->arg;
4465 msg.rpc_resp = &data->res;
4466 task_setup_data.callback_data = data;
4467 task = rpc_run_task(&task_setup_data);
4469 return PTR_ERR(task);
4470 ret = nfs4_wait_for_completion_rpc_task(task);
4472 ret = data->rpc_status;
4474 nfs4_handle_setlk_error(data->server, data->lsp,
4475 data->arg.new_lock_owner, ret);
4477 data->cancelled = 1;
4479 dprintk("%s: done, ret = %d!\n", __func__, ret);
4483 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4485 struct nfs_server *server = NFS_SERVER(state->inode);
4486 struct nfs4_exception exception = {
4487 .inode = state->inode,
4492 /* Cache the lock if possible... */
4493 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4495 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4496 if (err != -NFS4ERR_DELAY)
4498 nfs4_handle_exception(server, err, &exception);
4499 } while (exception.retry);
4503 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4505 struct nfs_server *server = NFS_SERVER(state->inode);
4506 struct nfs4_exception exception = {
4507 .inode = state->inode,
4511 err = nfs4_set_lock_state(state, request);
4515 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4517 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4521 case -NFS4ERR_GRACE:
4522 case -NFS4ERR_DELAY:
4523 nfs4_handle_exception(server, err, &exception);
4526 } while (exception.retry);
4531 #if defined(CONFIG_NFS_V4_1)
4532 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4535 struct nfs_server *server = NFS_SERVER(state->inode);
4537 status = nfs41_test_stateid(server, state);
4538 if (status == NFS_OK)
4540 nfs41_free_stateid(server, state);
4541 return nfs4_lock_expired(state, request);
4545 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4547 struct nfs_inode *nfsi = NFS_I(state->inode);
4548 unsigned char fl_flags = request->fl_flags;
4549 int status = -ENOLCK;
4551 if ((fl_flags & FL_POSIX) &&
4552 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4554 /* Is this a delegated open? */
4555 status = nfs4_set_lock_state(state, request);
4558 request->fl_flags |= FL_ACCESS;
4559 status = do_vfs_lock(request->fl_file, request);
4562 down_read(&nfsi->rwsem);
4563 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4564 /* Yes: cache locks! */
4565 /* ...but avoid races with delegation recall... */
4566 request->fl_flags = fl_flags & ~FL_SLEEP;
4567 status = do_vfs_lock(request->fl_file, request);
4570 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4573 /* Note: we always want to sleep here! */
4574 request->fl_flags = fl_flags | FL_SLEEP;
4575 if (do_vfs_lock(request->fl_file, request) < 0)
4576 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4578 up_read(&nfsi->rwsem);
4580 request->fl_flags = fl_flags;
4584 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4586 struct nfs4_exception exception = {
4588 .inode = state->inode,
4593 err = _nfs4_proc_setlk(state, cmd, request);
4594 if (err == -NFS4ERR_DENIED)
4596 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4598 } while (exception.retry);
4603 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4605 struct nfs_open_context *ctx;
4606 struct nfs4_state *state;
4607 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4610 /* verify open state */
4611 ctx = nfs_file_open_context(filp);
4614 if (request->fl_start < 0 || request->fl_end < 0)
4617 if (IS_GETLK(cmd)) {
4619 return nfs4_proc_getlk(state, F_GETLK, request);
4623 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4626 if (request->fl_type == F_UNLCK) {
4628 return nfs4_proc_unlck(state, cmd, request);
4635 * Don't rely on the VFS having checked the file open mode,
4636 * since it won't do this for flock() locks.
4638 switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {
4640 if (!(filp->f_mode & FMODE_READ))
4644 if (!(filp->f_mode & FMODE_WRITE))
4649 status = nfs4_proc_setlk(state, cmd, request);
4650 if ((status != -EAGAIN) || IS_SETLK(cmd))
4652 timeout = nfs4_set_lock_task_retry(timeout);
4653 status = -ERESTARTSYS;
4656 } while(status < 0);
4660 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4662 struct nfs_server *server = NFS_SERVER(state->inode);
4663 struct nfs4_exception exception = { };
4666 err = nfs4_set_lock_state(state, fl);
4670 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4673 printk(KERN_ERR "%s: unhandled error %d.\n",
4678 case -NFS4ERR_EXPIRED:
4679 nfs4_schedule_stateid_recovery(server, state);
4680 case -NFS4ERR_STALE_CLIENTID:
4681 case -NFS4ERR_STALE_STATEID:
4682 nfs4_schedule_lease_recovery(server->nfs_client);
4684 case -NFS4ERR_BADSESSION:
4685 case -NFS4ERR_BADSLOT:
4686 case -NFS4ERR_BAD_HIGH_SLOT:
4687 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4688 case -NFS4ERR_DEADSESSION:
4689 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4693 * The show must go on: exit, but mark the
4694 * stateid as needing recovery.
4696 case -NFS4ERR_DELEG_REVOKED:
4697 case -NFS4ERR_ADMIN_REVOKED:
4698 case -NFS4ERR_BAD_STATEID:
4699 case -NFS4ERR_OPENMODE:
4700 nfs4_schedule_stateid_recovery(server, state);
4705 * User RPCSEC_GSS context has expired.
4706 * We cannot recover this stateid now, so
4707 * skip it and allow recovery thread to
4713 case -NFS4ERR_DENIED:
4714 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4717 case -NFS4ERR_DELAY:
4720 err = nfs4_handle_exception(server, err, &exception);
4721 } while (exception.retry);
4726 static void nfs4_release_lockowner_release(void *calldata)
4731 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4732 .rpc_release = nfs4_release_lockowner_release,
4735 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4737 struct nfs_server *server = lsp->ls_state->owner->so_server;
4738 struct nfs_release_lockowner_args *args;
4739 struct rpc_message msg = {
4740 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4743 if (server->nfs_client->cl_mvops->minor_version != 0)
4745 args = kmalloc(sizeof(*args), GFP_NOFS);
4748 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4749 args->lock_owner.id = lsp->ls_id.id;
4750 args->lock_owner.s_dev = server->s_dev;
4751 msg.rpc_argp = args;
4752 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4755 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4757 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4758 const void *buf, size_t buflen,
4759 int flags, int type)
4761 if (strcmp(key, "") != 0)
4764 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4767 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4768 void *buf, size_t buflen, int type)
4770 if (strcmp(key, "") != 0)
4773 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4776 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4777 size_t list_len, const char *name,
4778 size_t name_len, int type)
4780 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4782 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4785 if (list && len <= list_len)
4786 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4791 * nfs_fhget will use either the mounted_on_fileid or the fileid
4793 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4795 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4796 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4797 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4798 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4801 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4802 NFS_ATTR_FATTR_NLINK;
4803 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4807 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4808 struct nfs4_fs_locations *fs_locations, struct page *page)
4810 struct nfs_server *server = NFS_SERVER(dir);
4812 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4814 struct nfs4_fs_locations_arg args = {
4815 .dir_fh = NFS_FH(dir),
4820 struct nfs4_fs_locations_res res = {
4821 .fs_locations = fs_locations,
4823 struct rpc_message msg = {
4824 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4830 dprintk("%s: start\n", __func__);
4832 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
4833 * is not supported */
4834 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
4835 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
4837 bitmask[0] |= FATTR4_WORD0_FILEID;
4839 nfs_fattr_init(&fs_locations->fattr);
4840 fs_locations->server = server;
4841 fs_locations->nlocations = 0;
4842 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4843 dprintk("%s: returned status = %d\n", __func__, status);
4847 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4850 struct nfs4_secinfo_arg args = {
4851 .dir_fh = NFS_FH(dir),
4854 struct nfs4_secinfo_res res = {
4857 struct rpc_message msg = {
4858 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
4863 dprintk("NFS call secinfo %s\n", name->name);
4864 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4865 dprintk("NFS reply secinfo: %d\n", status);
4869 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
4871 struct nfs4_exception exception = { };
4874 err = nfs4_handle_exception(NFS_SERVER(dir),
4875 _nfs4_proc_secinfo(dir, name, flavors),
4877 } while (exception.retry);
4881 #ifdef CONFIG_NFS_V4_1
4883 * Check the exchange flags returned by the server for invalid flags, having
4884 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4887 static int nfs4_check_cl_exchange_flags(u32 flags)
4889 if (flags & ~EXCHGID4_FLAG_MASK_R)
4891 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4892 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4894 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4898 return -NFS4ERR_INVAL;
4902 nfs41_same_server_scope(struct server_scope *a, struct server_scope *b)
4904 if (a->server_scope_sz == b->server_scope_sz &&
4905 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
4912 * nfs4_proc_exchange_id()
4914 * Since the clientid has expired, all compounds using sessions
4915 * associated with the stale clientid will be returning
4916 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4917 * be in some phase of session reset.
4919 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4921 nfs4_verifier verifier;
4922 struct nfs41_exchange_id_args args = {
4924 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4926 struct nfs41_exchange_id_res res = {
4930 struct rpc_message msg = {
4931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4938 dprintk("--> %s\n", __func__);
4939 BUG_ON(clp == NULL);
4941 p = (u32 *)verifier.data;
4942 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4943 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4944 args.verifier = &verifier;
4946 args.id_len = scnprintf(args.id, sizeof(args.id),
4949 init_utsname()->nodename,
4950 init_utsname()->domainname,
4951 clp->cl_rpcclient->cl_auth->au_flavor);
4953 res.server_scope = kzalloc(sizeof(struct server_scope), GFP_KERNEL);
4954 if (unlikely(!res.server_scope)) {
4959 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4961 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4964 if (clp->server_scope &&
4965 !nfs41_same_server_scope(clp->server_scope,
4966 res.server_scope)) {
4967 dprintk("%s: server_scope mismatch detected\n",
4969 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
4970 kfree(clp->server_scope);
4971 clp->server_scope = NULL;
4974 if (!clp->server_scope) {
4975 clp->server_scope = res.server_scope;
4979 kfree(res.server_scope);
4981 dprintk("<-- %s status= %d\n", __func__, status);
4985 struct nfs4_get_lease_time_data {
4986 struct nfs4_get_lease_time_args *args;
4987 struct nfs4_get_lease_time_res *res;
4988 struct nfs_client *clp;
4991 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4995 struct nfs4_get_lease_time_data *data =
4996 (struct nfs4_get_lease_time_data *)calldata;
4998 dprintk("--> %s\n", __func__);
4999 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5000 /* just setup sequence, do not trigger session recovery
5001 since we're invoked within one */
5002 ret = nfs41_setup_sequence(data->clp->cl_session,
5003 &data->args->la_seq_args,
5004 &data->res->lr_seq_res, 0, task);
5006 BUG_ON(ret == -EAGAIN);
5007 rpc_call_start(task);
5008 dprintk("<-- %s\n", __func__);
5012 * Called from nfs4_state_manager thread for session setup, so don't recover
5013 * from sequence operation or clientid errors.
5015 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5017 struct nfs4_get_lease_time_data *data =
5018 (struct nfs4_get_lease_time_data *)calldata;
5020 dprintk("--> %s\n", __func__);
5021 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5023 switch (task->tk_status) {
5024 case -NFS4ERR_DELAY:
5025 case -NFS4ERR_GRACE:
5026 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5027 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5028 task->tk_status = 0;
5030 case -NFS4ERR_RETRY_UNCACHED_REP:
5031 rpc_restart_call_prepare(task);
5034 dprintk("<-- %s\n", __func__);
5037 struct rpc_call_ops nfs4_get_lease_time_ops = {
5038 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5039 .rpc_call_done = nfs4_get_lease_time_done,
5042 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5044 struct rpc_task *task;
5045 struct nfs4_get_lease_time_args args;
5046 struct nfs4_get_lease_time_res res = {
5047 .lr_fsinfo = fsinfo,
5049 struct nfs4_get_lease_time_data data = {
5054 struct rpc_message msg = {
5055 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5059 struct rpc_task_setup task_setup = {
5060 .rpc_client = clp->cl_rpcclient,
5061 .rpc_message = &msg,
5062 .callback_ops = &nfs4_get_lease_time_ops,
5063 .callback_data = &data,
5064 .flags = RPC_TASK_TIMEOUT,
5068 dprintk("--> %s\n", __func__);
5069 task = rpc_run_task(&task_setup);
5072 status = PTR_ERR(task);
5074 status = task->tk_status;
5077 dprintk("<-- %s return %d\n", __func__, status);
5083 * Reset a slot table
5085 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5088 struct nfs4_slot *new = NULL;
5092 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5093 max_reqs, tbl->max_slots);
5095 /* Does the newly negotiated max_reqs match the existing slot table? */
5096 if (max_reqs != tbl->max_slots) {
5098 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
5105 spin_lock(&tbl->slot_tbl_lock);
5108 tbl->max_slots = max_reqs;
5110 for (i = 0; i < tbl->max_slots; ++i)
5111 tbl->slots[i].seq_nr = ivalue;
5112 spin_unlock(&tbl->slot_tbl_lock);
5113 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5114 tbl, tbl->slots, tbl->max_slots);
5116 dprintk("<-- %s: return %d\n", __func__, ret);
5121 * Reset the forechannel and backchannel slot tables
5123 static int nfs4_reset_slot_tables(struct nfs4_session *session)
5127 status = nfs4_reset_slot_table(&session->fc_slot_table,
5128 session->fc_attrs.max_reqs, 1);
5132 status = nfs4_reset_slot_table(&session->bc_slot_table,
5133 session->bc_attrs.max_reqs, 0);
5137 /* Destroy the slot table */
5138 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5140 if (session->fc_slot_table.slots != NULL) {
5141 kfree(session->fc_slot_table.slots);
5142 session->fc_slot_table.slots = NULL;
5144 if (session->bc_slot_table.slots != NULL) {
5145 kfree(session->bc_slot_table.slots);
5146 session->bc_slot_table.slots = NULL;
5152 * Initialize slot table
5154 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
5155 int max_slots, int ivalue)
5157 struct nfs4_slot *slot;
5160 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
5162 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
5164 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
5169 spin_lock(&tbl->slot_tbl_lock);
5170 tbl->max_slots = max_slots;
5172 tbl->highest_used_slotid = -1; /* no slot is currently used */
5173 spin_unlock(&tbl->slot_tbl_lock);
5174 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5175 tbl, tbl->slots, tbl->max_slots);
5177 dprintk("<-- %s: return %d\n", __func__, ret);
5182 * Initialize the forechannel and backchannel tables
5184 static int nfs4_init_slot_tables(struct nfs4_session *session)
5186 struct nfs4_slot_table *tbl;
5189 tbl = &session->fc_slot_table;
5190 if (tbl->slots == NULL) {
5191 status = nfs4_init_slot_table(tbl,
5192 session->fc_attrs.max_reqs, 1);
5197 tbl = &session->bc_slot_table;
5198 if (tbl->slots == NULL) {
5199 status = nfs4_init_slot_table(tbl,
5200 session->bc_attrs.max_reqs, 0);
5202 nfs4_destroy_slot_tables(session);
5208 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5210 struct nfs4_session *session;
5211 struct nfs4_slot_table *tbl;
5213 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5217 tbl = &session->fc_slot_table;
5218 tbl->highest_used_slotid = -1;
5219 spin_lock_init(&tbl->slot_tbl_lock);
5220 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5221 init_completion(&tbl->complete);
5223 tbl = &session->bc_slot_table;
5224 tbl->highest_used_slotid = -1;
5225 spin_lock_init(&tbl->slot_tbl_lock);
5226 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5227 init_completion(&tbl->complete);
5229 session->session_state = 1<<NFS4_SESSION_INITING;
5235 void nfs4_destroy_session(struct nfs4_session *session)
5237 nfs4_proc_destroy_session(session);
5238 dprintk("%s Destroy backchannel for xprt %p\n",
5239 __func__, session->clp->cl_rpcclient->cl_xprt);
5240 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
5241 NFS41_BC_MIN_CALLBACKS);
5242 nfs4_destroy_slot_tables(session);
5247 * Initialize the values to be used by the client in CREATE_SESSION
5248 * If nfs4_init_session set the fore channel request and response sizes,
5251 * Set the back channel max_resp_sz_cached to zero to force the client to
5252 * always set csa_cachethis to FALSE because the current implementation
5253 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5255 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5257 struct nfs4_session *session = args->client->cl_session;
5258 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5259 mxresp_sz = session->fc_attrs.max_resp_sz;
5262 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5264 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5265 /* Fore channel attributes */
5266 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5267 args->fc_attrs.max_resp_sz = mxresp_sz;
5268 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5269 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
5271 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5272 "max_ops=%u max_reqs=%u\n",
5274 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5275 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5277 /* Back channel attributes */
5278 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5279 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5280 args->bc_attrs.max_resp_sz_cached = 0;
5281 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5282 args->bc_attrs.max_reqs = 1;
5284 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5285 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5287 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5288 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5289 args->bc_attrs.max_reqs);
5292 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5294 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5295 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5297 if (rcvd->max_resp_sz > sent->max_resp_sz)
5300 * Our requested max_ops is the minimum we need; we're not
5301 * prepared to break up compounds into smaller pieces than that.
5302 * So, no point even trying to continue if the server won't
5305 if (rcvd->max_ops < sent->max_ops)
5307 if (rcvd->max_reqs == 0)
5312 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5314 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5315 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5317 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5319 if (rcvd->max_resp_sz < sent->max_resp_sz)
5321 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5323 /* These would render the backchannel useless: */
5324 if (rcvd->max_ops == 0)
5326 if (rcvd->max_reqs == 0)
5331 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5332 struct nfs4_session *session)
5336 ret = nfs4_verify_fore_channel_attrs(args, session);
5339 return nfs4_verify_back_channel_attrs(args, session);
5342 static int _nfs4_proc_create_session(struct nfs_client *clp)
5344 struct nfs4_session *session = clp->cl_session;
5345 struct nfs41_create_session_args args = {
5347 .cb_program = NFS4_CALLBACK,
5349 struct nfs41_create_session_res res = {
5352 struct rpc_message msg = {
5353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5359 nfs4_init_channel_attrs(&args);
5360 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5362 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5365 /* Verify the session's negotiated channel_attrs values */
5366 status = nfs4_verify_channel_attrs(&args, session);
5368 /* Increment the clientid slot sequence id */
5376 * Issues a CREATE_SESSION operation to the server.
5377 * It is the responsibility of the caller to verify the session is
5378 * expired before calling this routine.
5380 int nfs4_proc_create_session(struct nfs_client *clp)
5384 struct nfs4_session *session = clp->cl_session;
5386 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5388 status = _nfs4_proc_create_session(clp);
5392 /* Init and reset the fore channel */
5393 status = nfs4_init_slot_tables(session);
5394 dprintk("slot table initialization returned %d\n", status);
5397 status = nfs4_reset_slot_tables(session);
5398 dprintk("slot table reset returned %d\n", status);
5402 ptr = (unsigned *)&session->sess_id.data[0];
5403 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5404 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5406 dprintk("<-- %s\n", __func__);
5411 * Issue the over-the-wire RPC DESTROY_SESSION.
5412 * The caller must serialize access to this routine.
5414 int nfs4_proc_destroy_session(struct nfs4_session *session)
5417 struct rpc_message msg;
5419 dprintk("--> nfs4_proc_destroy_session\n");
5421 /* session is still being setup */
5422 if (session->clp->cl_cons_state != NFS_CS_READY)
5425 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5426 msg.rpc_argp = session;
5427 msg.rpc_resp = NULL;
5428 msg.rpc_cred = NULL;
5429 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5433 "Got error %d from the server on DESTROY_SESSION. "
5434 "Session has been destroyed regardless...\n", status);
5436 dprintk("<-- nfs4_proc_destroy_session\n");
5440 int nfs4_init_session(struct nfs_server *server)
5442 struct nfs_client *clp = server->nfs_client;
5443 struct nfs4_session *session;
5444 unsigned int rsize, wsize;
5447 if (!nfs4_has_session(clp))
5450 session = clp->cl_session;
5451 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5454 rsize = server->rsize;
5456 rsize = NFS_MAX_FILE_IO_SIZE;
5457 wsize = server->wsize;
5459 wsize = NFS_MAX_FILE_IO_SIZE;
5461 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5462 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5464 ret = nfs4_recover_expired_lease(server);
5466 ret = nfs4_check_client_ready(clp);
5470 int nfs4_init_ds_session(struct nfs_client *clp)
5472 struct nfs4_session *session = clp->cl_session;
5475 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5478 ret = nfs4_client_recover_expired_lease(clp);
5480 /* Test for the DS role */
5481 if (!is_ds_client(clp))
5484 ret = nfs4_check_client_ready(clp);
5488 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5492 * Renew the cl_session lease.
5494 struct nfs4_sequence_data {
5495 struct nfs_client *clp;
5496 struct nfs4_sequence_args args;
5497 struct nfs4_sequence_res res;
5500 static void nfs41_sequence_release(void *data)
5502 struct nfs4_sequence_data *calldata = data;
5503 struct nfs_client *clp = calldata->clp;
5505 if (atomic_read(&clp->cl_count) > 1)
5506 nfs4_schedule_state_renewal(clp);
5507 nfs_put_client(clp);
5511 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5513 switch(task->tk_status) {
5514 case -NFS4ERR_DELAY:
5515 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5518 nfs4_schedule_lease_recovery(clp);
5523 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5525 struct nfs4_sequence_data *calldata = data;
5526 struct nfs_client *clp = calldata->clp;
5528 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5531 if (task->tk_status < 0) {
5532 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5533 if (atomic_read(&clp->cl_count) == 1)
5536 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5537 rpc_restart_call_prepare(task);
5541 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5543 dprintk("<-- %s\n", __func__);
5546 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5548 struct nfs4_sequence_data *calldata = data;
5549 struct nfs_client *clp = calldata->clp;
5550 struct nfs4_sequence_args *args;
5551 struct nfs4_sequence_res *res;
5553 args = task->tk_msg.rpc_argp;
5554 res = task->tk_msg.rpc_resp;
5556 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
5558 rpc_call_start(task);
5561 static void nfs41_sequence_prepare_privileged(struct rpc_task *task, void *data)
5563 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5564 nfs41_sequence_prepare(task, data);
5567 static const struct rpc_call_ops nfs41_sequence_ops = {
5568 .rpc_call_done = nfs41_sequence_call_done,
5569 .rpc_call_prepare = nfs41_sequence_prepare,
5570 .rpc_release = nfs41_sequence_release,
5573 static const struct rpc_call_ops nfs41_sequence_privileged_ops = {
5574 .rpc_call_done = nfs41_sequence_call_done,
5575 .rpc_call_prepare = nfs41_sequence_prepare_privileged,
5576 .rpc_release = nfs41_sequence_release,
5579 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred,
5580 const struct rpc_call_ops *seq_ops)
5582 struct nfs4_sequence_data *calldata;
5583 struct rpc_message msg = {
5584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5587 struct rpc_task_setup task_setup_data = {
5588 .rpc_client = clp->cl_rpcclient,
5589 .rpc_message = &msg,
5590 .callback_ops = seq_ops,
5591 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5594 if (!atomic_inc_not_zero(&clp->cl_count))
5595 return ERR_PTR(-EIO);
5596 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5597 if (calldata == NULL) {
5598 nfs_put_client(clp);
5599 return ERR_PTR(-ENOMEM);
5601 msg.rpc_argp = &calldata->args;
5602 msg.rpc_resp = &calldata->res;
5603 calldata->clp = clp;
5604 task_setup_data.callback_data = calldata;
5606 return rpc_run_task(&task_setup_data);
5609 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5611 struct rpc_task *task;
5614 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5616 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_ops);
5618 ret = PTR_ERR(task);
5620 rpc_put_task_async(task);
5621 dprintk("<-- %s status=%d\n", __func__, ret);
5625 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5627 struct rpc_task *task;
5630 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_privileged_ops);
5632 ret = PTR_ERR(task);
5635 ret = rpc_wait_for_completion_task(task);
5637 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5639 if (task->tk_status == 0)
5640 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5641 ret = task->tk_status;
5645 dprintk("<-- %s status=%d\n", __func__, ret);
5649 struct nfs4_reclaim_complete_data {
5650 struct nfs_client *clp;
5651 struct nfs41_reclaim_complete_args arg;
5652 struct nfs41_reclaim_complete_res res;
5655 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5657 struct nfs4_reclaim_complete_data *calldata = data;
5659 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5660 if (nfs41_setup_sequence(calldata->clp->cl_session,
5661 &calldata->arg.seq_args,
5662 &calldata->res.seq_res, 0, task))
5665 rpc_call_start(task);
5668 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5670 switch(task->tk_status) {
5672 case -NFS4ERR_COMPLETE_ALREADY:
5673 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5675 case -NFS4ERR_DELAY:
5676 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5678 case -NFS4ERR_RETRY_UNCACHED_REP:
5681 nfs4_schedule_lease_recovery(clp);
5686 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5688 struct nfs4_reclaim_complete_data *calldata = data;
5689 struct nfs_client *clp = calldata->clp;
5690 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5692 dprintk("--> %s\n", __func__);
5693 if (!nfs41_sequence_done(task, res))
5696 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5697 rpc_restart_call_prepare(task);
5700 dprintk("<-- %s\n", __func__);
5703 static void nfs4_free_reclaim_complete_data(void *data)
5705 struct nfs4_reclaim_complete_data *calldata = data;
5710 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5711 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5712 .rpc_call_done = nfs4_reclaim_complete_done,
5713 .rpc_release = nfs4_free_reclaim_complete_data,
5717 * Issue a global reclaim complete.
5719 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5721 struct nfs4_reclaim_complete_data *calldata;
5722 struct rpc_task *task;
5723 struct rpc_message msg = {
5724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5726 struct rpc_task_setup task_setup_data = {
5727 .rpc_client = clp->cl_rpcclient,
5728 .rpc_message = &msg,
5729 .callback_ops = &nfs4_reclaim_complete_call_ops,
5730 .flags = RPC_TASK_ASYNC,
5732 int status = -ENOMEM;
5734 dprintk("--> %s\n", __func__);
5735 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5736 if (calldata == NULL)
5738 calldata->clp = clp;
5739 calldata->arg.one_fs = 0;
5741 msg.rpc_argp = &calldata->arg;
5742 msg.rpc_resp = &calldata->res;
5743 task_setup_data.callback_data = calldata;
5744 task = rpc_run_task(&task_setup_data);
5746 status = PTR_ERR(task);
5749 status = nfs4_wait_for_completion_rpc_task(task);
5751 status = task->tk_status;
5755 dprintk("<-- %s status=%d\n", __func__, status);
5760 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5762 struct nfs4_layoutget *lgp = calldata;
5763 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5765 dprintk("--> %s\n", __func__);
5766 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5767 * right now covering the LAYOUTGET we are about to send.
5768 * However, that is not so catastrophic, and there seems
5769 * to be no way to prevent it completely.
5771 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5772 &lgp->res.seq_res, 0, task))
5774 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5775 NFS_I(lgp->args.inode)->layout,
5776 lgp->args.ctx->state)) {
5777 rpc_exit(task, NFS4_OK);
5780 rpc_call_start(task);
5783 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5785 struct nfs4_layoutget *lgp = calldata;
5786 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5788 dprintk("--> %s\n", __func__);
5790 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5793 switch (task->tk_status) {
5796 case -NFS4ERR_LAYOUTTRYLATER:
5797 case -NFS4ERR_RECALLCONFLICT:
5798 task->tk_status = -NFS4ERR_DELAY;
5801 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5802 rpc_restart_call_prepare(task);
5806 dprintk("<-- %s\n", __func__);
5809 static size_t max_response_pages(struct nfs_server *server)
5811 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
5812 return nfs_page_array_len(0, max_resp_sz);
5815 static void nfs4_free_pages(struct page **pages, size_t size)
5822 for (i = 0; i < size; i++) {
5825 __free_page(pages[i]);
5830 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
5832 struct page **pages;
5835 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
5837 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
5841 for (i = 0; i < size; i++) {
5842 pages[i] = alloc_page(gfp_flags);
5844 dprintk("%s: failed to allocate page\n", __func__);
5845 nfs4_free_pages(pages, size);
5853 static void nfs4_layoutget_release(void *calldata)
5855 struct nfs4_layoutget *lgp = calldata;
5856 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5857 size_t max_pages = max_response_pages(server);
5859 dprintk("--> %s\n", __func__);
5860 nfs4_free_pages(lgp->args.layout.pages, max_pages);
5861 put_nfs_open_context(lgp->args.ctx);
5863 dprintk("<-- %s\n", __func__);
5866 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5867 .rpc_call_prepare = nfs4_layoutget_prepare,
5868 .rpc_call_done = nfs4_layoutget_done,
5869 .rpc_release = nfs4_layoutget_release,
5872 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
5874 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5875 size_t max_pages = max_response_pages(server);
5876 struct rpc_task *task;
5877 struct rpc_message msg = {
5878 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5879 .rpc_argp = &lgp->args,
5880 .rpc_resp = &lgp->res,
5882 struct rpc_task_setup task_setup_data = {
5883 .rpc_client = server->client,
5884 .rpc_message = &msg,
5885 .callback_ops = &nfs4_layoutget_call_ops,
5886 .callback_data = lgp,
5887 .flags = RPC_TASK_ASYNC,
5891 dprintk("--> %s\n", __func__);
5893 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
5894 if (!lgp->args.layout.pages) {
5895 nfs4_layoutget_release(lgp);
5898 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
5900 lgp->res.layoutp = &lgp->args.layout;
5901 lgp->res.seq_res.sr_slot = NULL;
5902 task = rpc_run_task(&task_setup_data);
5904 return PTR_ERR(task);
5905 status = nfs4_wait_for_completion_rpc_task(task);
5907 status = task->tk_status;
5908 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
5909 if (status == 0 && lgp->res.layoutp->len)
5910 status = pnfs_layout_process(lgp);
5912 dprintk("<-- %s status=%d\n", __func__, status);
5917 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
5919 struct nfs4_layoutreturn *lrp = calldata;
5921 dprintk("--> %s\n", __func__);
5922 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
5923 &lrp->res.seq_res, 0, task))
5925 rpc_call_start(task);
5928 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
5930 struct nfs4_layoutreturn *lrp = calldata;
5931 struct nfs_server *server;
5932 struct pnfs_layout_hdr *lo = lrp->args.layout;
5934 dprintk("--> %s\n", __func__);
5936 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
5939 server = NFS_SERVER(lrp->args.inode);
5940 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5941 rpc_restart_call_prepare(task);
5944 spin_lock(&lo->plh_inode->i_lock);
5945 if (task->tk_status == 0) {
5946 if (lrp->res.lrs_present) {
5947 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
5949 BUG_ON(!list_empty(&lo->plh_segs));
5951 lo->plh_block_lgets--;
5952 spin_unlock(&lo->plh_inode->i_lock);
5953 dprintk("<-- %s\n", __func__);
5956 static void nfs4_layoutreturn_release(void *calldata)
5958 struct nfs4_layoutreturn *lrp = calldata;
5960 dprintk("--> %s\n", __func__);
5961 put_layout_hdr(lrp->args.layout);
5963 dprintk("<-- %s\n", __func__);
5966 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
5967 .rpc_call_prepare = nfs4_layoutreturn_prepare,
5968 .rpc_call_done = nfs4_layoutreturn_done,
5969 .rpc_release = nfs4_layoutreturn_release,
5972 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
5974 struct rpc_task *task;
5975 struct rpc_message msg = {
5976 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
5977 .rpc_argp = &lrp->args,
5978 .rpc_resp = &lrp->res,
5980 struct rpc_task_setup task_setup_data = {
5981 .rpc_client = lrp->clp->cl_rpcclient,
5982 .rpc_message = &msg,
5983 .callback_ops = &nfs4_layoutreturn_call_ops,
5984 .callback_data = lrp,
5988 dprintk("--> %s\n", __func__);
5989 task = rpc_run_task(&task_setup_data);
5991 return PTR_ERR(task);
5992 status = task->tk_status;
5993 dprintk("<-- %s status=%d\n", __func__, status);
5999 * Retrieve the list of Data Server devices from the MDS.
6001 static int _nfs4_getdevicelist(struct nfs_server *server,
6002 const struct nfs_fh *fh,
6003 struct pnfs_devicelist *devlist)
6005 struct nfs4_getdevicelist_args args = {
6007 .layoutclass = server->pnfs_curr_ld->id,
6009 struct nfs4_getdevicelist_res res = {
6012 struct rpc_message msg = {
6013 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6019 dprintk("--> %s\n", __func__);
6020 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6022 dprintk("<-- %s status=%d\n", __func__, status);
6026 int nfs4_proc_getdevicelist(struct nfs_server *server,
6027 const struct nfs_fh *fh,
6028 struct pnfs_devicelist *devlist)
6030 struct nfs4_exception exception = { };
6034 err = nfs4_handle_exception(server,
6035 _nfs4_getdevicelist(server, fh, devlist),
6037 } while (exception.retry);
6039 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6040 err, devlist->num_devs);
6044 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6047 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6049 struct nfs4_getdeviceinfo_args args = {
6052 struct nfs4_getdeviceinfo_res res = {
6055 struct rpc_message msg = {
6056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6062 dprintk("--> %s\n", __func__);
6063 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6064 dprintk("<-- %s status=%d\n", __func__, status);
6069 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6071 struct nfs4_exception exception = { };
6075 err = nfs4_handle_exception(server,
6076 _nfs4_proc_getdeviceinfo(server, pdev),
6078 } while (exception.retry);
6081 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6083 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6085 struct nfs4_layoutcommit_data *data = calldata;
6086 struct nfs_server *server = NFS_SERVER(data->args.inode);
6088 if (nfs4_setup_sequence(server, &data->args.seq_args,
6089 &data->res.seq_res, 1, task))
6091 rpc_call_start(task);
6095 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6097 struct nfs4_layoutcommit_data *data = calldata;
6098 struct nfs_server *server = NFS_SERVER(data->args.inode);
6100 if (!nfs4_sequence_done(task, &data->res.seq_res))
6103 switch (task->tk_status) { /* Just ignore these failures */
6104 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6105 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6106 case -NFS4ERR_BADLAYOUT: /* no layout */
6107 case -NFS4ERR_GRACE: /* loca_recalim always false */
6108 task->tk_status = 0;
6111 nfs_post_op_update_inode_force_wcc(data->args.inode,
6115 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6116 rpc_restart_call_prepare(task);
6122 static void nfs4_layoutcommit_release(void *calldata)
6124 struct nfs4_layoutcommit_data *data = calldata;
6126 pnfs_cleanup_layoutcommit(data);
6127 put_rpccred(data->cred);
6131 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6132 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6133 .rpc_call_done = nfs4_layoutcommit_done,
6134 .rpc_release = nfs4_layoutcommit_release,
6138 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6140 struct rpc_message msg = {
6141 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6142 .rpc_argp = &data->args,
6143 .rpc_resp = &data->res,
6144 .rpc_cred = data->cred,
6146 struct rpc_task_setup task_setup_data = {
6147 .task = &data->task,
6148 .rpc_client = NFS_CLIENT(data->args.inode),
6149 .rpc_message = &msg,
6150 .callback_ops = &nfs4_layoutcommit_ops,
6151 .callback_data = data,
6152 .flags = RPC_TASK_ASYNC,
6154 struct rpc_task *task;
6157 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6158 "lbw: %llu inode %lu\n",
6159 data->task.tk_pid, sync,
6160 data->args.lastbytewritten,
6161 data->args.inode->i_ino);
6163 task = rpc_run_task(&task_setup_data);
6165 return PTR_ERR(task);
6168 status = nfs4_wait_for_completion_rpc_task(task);
6171 status = task->tk_status;
6173 dprintk("%s: status %d\n", __func__, status);
6179 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6180 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6182 struct nfs41_secinfo_no_name_args args = {
6183 .style = SECINFO_STYLE_CURRENT_FH,
6185 struct nfs4_secinfo_res res = {
6188 struct rpc_message msg = {
6189 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6193 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6197 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6198 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6200 struct nfs4_exception exception = { };
6203 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6206 case -NFS4ERR_WRONGSEC:
6210 err = nfs4_handle_exception(server, err, &exception);
6212 } while (exception.retry);
6218 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6219 struct nfs_fsinfo *info)
6223 rpc_authflavor_t flavor;
6224 struct nfs4_secinfo_flavors *flavors;
6226 page = alloc_page(GFP_KERNEL);
6232 flavors = page_address(page);
6233 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6236 * Fall back on "guess and check" method if
6237 * the server doesn't support SECINFO_NO_NAME
6239 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
6240 err = nfs4_find_root_sec(server, fhandle, info);
6246 flavor = nfs_find_best_sec(flavors);
6248 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6257 static int _nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6260 struct nfs41_test_stateid_args args = {
6261 .stateid = &state->stateid,
6263 struct nfs41_test_stateid_res res;
6264 struct rpc_message msg = {
6265 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6269 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6270 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6274 static int nfs41_test_stateid(struct nfs_server *server, struct nfs4_state *state)
6276 struct nfs4_exception exception = { };
6279 err = nfs4_handle_exception(server,
6280 _nfs41_test_stateid(server, state),
6282 } while (exception.retry);
6286 static int _nfs4_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6289 struct nfs41_free_stateid_args args = {
6290 .stateid = &state->stateid,
6292 struct nfs41_free_stateid_res res;
6293 struct rpc_message msg = {
6294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6299 args.seq_args.sa_session = res.seq_res.sr_session = NULL;
6300 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 0, 1);
6304 static int nfs41_free_stateid(struct nfs_server *server, struct nfs4_state *state)
6306 struct nfs4_exception exception = { };
6309 err = nfs4_handle_exception(server,
6310 _nfs4_free_stateid(server, state),
6312 } while (exception.retry);
6315 #endif /* CONFIG_NFS_V4_1 */
6317 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6318 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6319 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6320 .recover_open = nfs4_open_reclaim,
6321 .recover_lock = nfs4_lock_reclaim,
6322 .establish_clid = nfs4_init_clientid,
6323 .get_clid_cred = nfs4_get_setclientid_cred,
6326 #if defined(CONFIG_NFS_V4_1)
6327 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6328 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6329 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6330 .recover_open = nfs4_open_reclaim,
6331 .recover_lock = nfs4_lock_reclaim,
6332 .establish_clid = nfs41_init_clientid,
6333 .get_clid_cred = nfs4_get_exchange_id_cred,
6334 .reclaim_complete = nfs41_proc_reclaim_complete,
6336 #endif /* CONFIG_NFS_V4_1 */
6338 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6339 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6340 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6341 .recover_open = nfs4_open_expired,
6342 .recover_lock = nfs4_lock_expired,
6343 .establish_clid = nfs4_init_clientid,
6344 .get_clid_cred = nfs4_get_setclientid_cred,
6347 #if defined(CONFIG_NFS_V4_1)
6348 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6349 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6350 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6351 .recover_open = nfs41_open_expired,
6352 .recover_lock = nfs41_lock_expired,
6353 .establish_clid = nfs41_init_clientid,
6354 .get_clid_cred = nfs4_get_exchange_id_cred,
6356 #endif /* CONFIG_NFS_V4_1 */
6358 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6359 .sched_state_renewal = nfs4_proc_async_renew,
6360 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6361 .renew_lease = nfs4_proc_renew,
6364 #if defined(CONFIG_NFS_V4_1)
6365 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6366 .sched_state_renewal = nfs41_proc_async_sequence,
6367 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6368 .renew_lease = nfs4_proc_sequence,
6372 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6374 .call_sync = _nfs4_call_sync,
6375 .validate_stateid = nfs4_validate_delegation_stateid,
6376 .find_root_sec = nfs4_find_root_sec,
6377 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6378 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6379 .state_renewal_ops = &nfs40_state_renewal_ops,
6382 #if defined(CONFIG_NFS_V4_1)
6383 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6385 .call_sync = _nfs4_call_sync_session,
6386 .validate_stateid = nfs41_validate_delegation_stateid,
6387 .find_root_sec = nfs41_find_root_sec,
6388 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6389 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6390 .state_renewal_ops = &nfs41_state_renewal_ops,
6394 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6395 [0] = &nfs_v4_0_minor_ops,
6396 #if defined(CONFIG_NFS_V4_1)
6397 [1] = &nfs_v4_1_minor_ops,
6401 static const struct inode_operations nfs4_file_inode_operations = {
6402 .permission = nfs_permission,
6403 .getattr = nfs_getattr,
6404 .setattr = nfs_setattr,
6405 .getxattr = generic_getxattr,
6406 .setxattr = generic_setxattr,
6407 .listxattr = generic_listxattr,
6408 .removexattr = generic_removexattr,
6411 const struct nfs_rpc_ops nfs_v4_clientops = {
6412 .version = 4, /* protocol version */
6413 .dentry_ops = &nfs4_dentry_operations,
6414 .dir_inode_ops = &nfs4_dir_inode_operations,
6415 .file_inode_ops = &nfs4_file_inode_operations,
6416 .file_ops = &nfs4_file_operations,
6417 .getroot = nfs4_proc_get_root,
6418 .getattr = nfs4_proc_getattr,
6419 .setattr = nfs4_proc_setattr,
6420 .lookup = nfs4_proc_lookup,
6421 .access = nfs4_proc_access,
6422 .readlink = nfs4_proc_readlink,
6423 .create = nfs4_proc_create,
6424 .remove = nfs4_proc_remove,
6425 .unlink_setup = nfs4_proc_unlink_setup,
6426 .unlink_done = nfs4_proc_unlink_done,
6427 .rename = nfs4_proc_rename,
6428 .rename_setup = nfs4_proc_rename_setup,
6429 .rename_done = nfs4_proc_rename_done,
6430 .link = nfs4_proc_link,
6431 .symlink = nfs4_proc_symlink,
6432 .mkdir = nfs4_proc_mkdir,
6433 .rmdir = nfs4_proc_remove,
6434 .readdir = nfs4_proc_readdir,
6435 .mknod = nfs4_proc_mknod,
6436 .statfs = nfs4_proc_statfs,
6437 .fsinfo = nfs4_proc_fsinfo,
6438 .pathconf = nfs4_proc_pathconf,
6439 .set_capabilities = nfs4_server_capabilities,
6440 .decode_dirent = nfs4_decode_dirent,
6441 .read_setup = nfs4_proc_read_setup,
6442 .read_done = nfs4_read_done,
6443 .write_setup = nfs4_proc_write_setup,
6444 .write_done = nfs4_write_done,
6445 .commit_setup = nfs4_proc_commit_setup,
6446 .commit_done = nfs4_commit_done,
6447 .lock = nfs4_proc_lock,
6448 .clear_acl_cache = nfs4_zap_acl_attr,
6449 .close_context = nfs4_close_context,
6450 .open_context = nfs4_atomic_open,
6451 .init_client = nfs4_init_client,
6452 .secinfo = nfs4_proc_secinfo,
6455 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6456 .prefix = XATTR_NAME_NFSV4_ACL,
6457 .list = nfs4_xattr_list_nfs4_acl,
6458 .get = nfs4_xattr_get_nfs4_acl,
6459 .set = nfs4_xattr_set_nfs4_acl,
6462 const struct xattr_handler *nfs4_xattr_handlers[] = {
6463 &nfs4_xattr_nfs4_acl_handler,