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/slab.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/namei.h>
49 #include <linux/mount.h>
50 #include <linux/module.h>
51 #include <linux/sunrpc/bc_xprt.h>
54 #include "delegation.h"
59 #define NFSDBG_FACILITY NFSDBG_PROC
61 #define NFS4_POLL_RETRY_MIN (HZ/10)
62 #define NFS4_POLL_RETRY_MAX (15*HZ)
64 #define NFS4_MAX_LOOP_ON_RECOVER (10)
67 static int _nfs4_proc_open(struct nfs4_opendata *data);
68 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
69 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
70 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
71 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
72 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
73 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
74 struct nfs_fattr *fattr, struct iattr *sattr,
75 struct nfs4_state *state);
77 /* Prevent leaks of NFSv4 errors into userland */
78 static int nfs4_map_errors(int err)
83 case -NFS4ERR_RESOURCE:
86 dprintk("%s could not handle NFSv4 error %d\n",
94 * This is our standard bitmap for GETATTR requests.
96 const u32 nfs4_fattr_bitmap[2] = {
101 | FATTR4_WORD0_FILEID,
103 | FATTR4_WORD1_NUMLINKS
105 | FATTR4_WORD1_OWNER_GROUP
106 | FATTR4_WORD1_RAWDEV
107 | FATTR4_WORD1_SPACE_USED
108 | FATTR4_WORD1_TIME_ACCESS
109 | FATTR4_WORD1_TIME_METADATA
110 | FATTR4_WORD1_TIME_MODIFY
113 const u32 nfs4_statfs_bitmap[2] = {
114 FATTR4_WORD0_FILES_AVAIL
115 | FATTR4_WORD0_FILES_FREE
116 | FATTR4_WORD0_FILES_TOTAL,
117 FATTR4_WORD1_SPACE_AVAIL
118 | FATTR4_WORD1_SPACE_FREE
119 | FATTR4_WORD1_SPACE_TOTAL
122 const u32 nfs4_pathconf_bitmap[2] = {
124 | FATTR4_WORD0_MAXNAME,
128 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
129 | FATTR4_WORD0_MAXREAD
130 | FATTR4_WORD0_MAXWRITE
131 | FATTR4_WORD0_LEASE_TIME,
135 const u32 nfs4_fs_locations_bitmap[2] = {
137 | FATTR4_WORD0_CHANGE
140 | FATTR4_WORD0_FILEID
141 | FATTR4_WORD0_FS_LOCATIONS,
143 | FATTR4_WORD1_NUMLINKS
145 | FATTR4_WORD1_OWNER_GROUP
146 | FATTR4_WORD1_RAWDEV
147 | FATTR4_WORD1_SPACE_USED
148 | FATTR4_WORD1_TIME_ACCESS
149 | FATTR4_WORD1_TIME_METADATA
150 | FATTR4_WORD1_TIME_MODIFY
151 | FATTR4_WORD1_MOUNTED_ON_FILEID
154 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
155 struct nfs4_readdir_arg *readdir)
159 BUG_ON(readdir->count < 80);
161 readdir->cookie = cookie;
162 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
167 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
172 * NFSv4 servers do not return entries for '.' and '..'
173 * Therefore, we fake these entries here. We let '.'
174 * have cookie 0 and '..' have cookie 1. Note that
175 * when talking to the server, we always send cookie 0
178 start = p = kmap_atomic(*readdir->pages, KM_USER0);
181 *p++ = xdr_one; /* next */
182 *p++ = xdr_zero; /* cookie, first word */
183 *p++ = xdr_one; /* cookie, second word */
184 *p++ = xdr_one; /* entry len */
185 memcpy(p, ".\0\0\0", 4); /* entry */
187 *p++ = xdr_one; /* bitmap length */
188 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
189 *p++ = htonl(8); /* attribute buffer length */
190 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
193 *p++ = xdr_one; /* next */
194 *p++ = xdr_zero; /* cookie, first word */
195 *p++ = xdr_two; /* cookie, second word */
196 *p++ = xdr_two; /* entry len */
197 memcpy(p, "..\0\0", 4); /* entry */
199 *p++ = xdr_one; /* bitmap length */
200 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
201 *p++ = htonl(8); /* attribute buffer length */
202 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
204 readdir->pgbase = (char *)p - (char *)start;
205 readdir->count -= readdir->pgbase;
206 kunmap_atomic(start, KM_USER0);
209 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
215 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
216 nfs_wait_bit_killable, TASK_KILLABLE);
220 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
227 *timeout = NFS4_POLL_RETRY_MIN;
228 if (*timeout > NFS4_POLL_RETRY_MAX)
229 *timeout = NFS4_POLL_RETRY_MAX;
230 schedule_timeout_killable(*timeout);
231 if (fatal_signal_pending(current))
237 /* This is the error handling routine for processes that are allowed
240 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
242 struct nfs_client *clp = server->nfs_client;
243 struct nfs4_state *state = exception->state;
246 exception->retry = 0;
250 case -NFS4ERR_ADMIN_REVOKED:
251 case -NFS4ERR_BAD_STATEID:
252 case -NFS4ERR_OPENMODE:
255 nfs4_state_mark_reclaim_nograce(clp, state);
256 goto do_state_recovery;
257 case -NFS4ERR_STALE_STATEID:
260 nfs4_state_mark_reclaim_reboot(clp, state);
261 case -NFS4ERR_STALE_CLIENTID:
262 case -NFS4ERR_EXPIRED:
263 goto do_state_recovery;
264 #if defined(CONFIG_NFS_V4_1)
265 case -NFS4ERR_BADSESSION:
266 case -NFS4ERR_BADSLOT:
267 case -NFS4ERR_BAD_HIGH_SLOT:
268 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
269 case -NFS4ERR_DEADSESSION:
270 case -NFS4ERR_SEQ_FALSE_RETRY:
271 case -NFS4ERR_SEQ_MISORDERED:
272 dprintk("%s ERROR: %d Reset session\n", __func__,
274 nfs4_schedule_state_recovery(clp);
275 exception->retry = 1;
277 #endif /* defined(CONFIG_NFS_V4_1) */
278 case -NFS4ERR_FILE_OPEN:
279 if (exception->timeout > HZ) {
280 /* We have retried a decent amount, time to
289 ret = nfs4_delay(server->client, &exception->timeout);
292 case -NFS4ERR_OLD_STATEID:
293 exception->retry = 1;
295 /* We failed to handle the error */
296 return nfs4_map_errors(ret);
298 nfs4_schedule_state_recovery(clp);
299 ret = nfs4_wait_clnt_recover(clp);
301 exception->retry = 1;
306 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
308 spin_lock(&clp->cl_lock);
309 if (time_before(clp->cl_last_renewal,timestamp))
310 clp->cl_last_renewal = timestamp;
311 spin_unlock(&clp->cl_lock);
314 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
316 do_renew_lease(server->nfs_client, timestamp);
319 #if defined(CONFIG_NFS_V4_1)
322 * nfs4_free_slot - free a slot and efficiently update slot table.
324 * freeing a slot is trivially done by clearing its respective bit
326 * If the freed slotid equals highest_used_slotid we want to update it
327 * so that the server would be able to size down the slot table if needed,
328 * otherwise we know that the highest_used_slotid is still in use.
329 * When updating highest_used_slotid there may be "holes" in the bitmap
330 * so we need to scan down from highest_used_slotid to 0 looking for the now
331 * highest slotid in use.
332 * If none found, highest_used_slotid is set to -1.
334 * Must be called while holding tbl->slot_tbl_lock
337 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
339 int slotid = free_slotid;
341 /* clear used bit in bitmap */
342 __clear_bit(slotid, tbl->used_slots);
344 /* update highest_used_slotid when it is freed */
345 if (slotid == tbl->highest_used_slotid) {
346 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
347 if (slotid < tbl->max_slots)
348 tbl->highest_used_slotid = slotid;
350 tbl->highest_used_slotid = -1;
352 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
353 free_slotid, tbl->highest_used_slotid);
357 * Signal state manager thread if session is drained
359 static void nfs41_check_drain_session_complete(struct nfs4_session *ses)
361 struct rpc_task *task;
363 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
364 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
366 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
370 if (ses->fc_slot_table.highest_used_slotid != -1)
373 dprintk("%s COMPLETE: Session Drained\n", __func__);
374 complete(&ses->complete);
377 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
379 struct nfs4_slot_table *tbl;
381 tbl = &res->sr_session->fc_slot_table;
382 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
383 /* just wake up the next guy waiting since
384 * we may have not consumed a slot after all */
385 dprintk("%s: No slot\n", __func__);
389 spin_lock(&tbl->slot_tbl_lock);
390 nfs4_free_slot(tbl, res->sr_slotid);
391 nfs41_check_drain_session_complete(res->sr_session);
392 spin_unlock(&tbl->slot_tbl_lock);
393 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
396 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
398 unsigned long timestamp;
399 struct nfs4_slot_table *tbl;
400 struct nfs4_slot *slot;
401 struct nfs_client *clp;
404 * sr_status remains 1 if an RPC level error occurred. The server
405 * may or may not have processed the sequence operation..
406 * Proceed as if the server received and processed the sequence
409 if (res->sr_status == 1)
410 res->sr_status = NFS_OK;
412 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
413 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
416 tbl = &res->sr_session->fc_slot_table;
417 slot = tbl->slots + res->sr_slotid;
419 /* Check the SEQUENCE operation status */
420 switch (res->sr_status) {
422 /* Update the slot's sequence and clientid lease timer */
424 timestamp = res->sr_renewal_time;
425 clp = res->sr_session->clp;
426 do_renew_lease(clp, timestamp);
427 /* Check sequence flags */
428 if (atomic_read(&clp->cl_count) > 1)
429 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
432 /* The server detected a resend of the RPC call and
433 * returned NFS4ERR_DELAY as per Section 2.10.6.2
436 dprintk("%s: slot=%d seq=%d: Operation in progress\n",
437 __func__, res->sr_slotid, slot->seq_nr);
440 /* Just update the slot sequence no. */
444 /* The session may be reset by one of the error handlers. */
445 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
446 nfs41_sequence_free_slot(res);
449 rpc_restart_call(task);
450 /* FIXME: rpc_restart_call() should be made to return success/fail */
451 if (task->tk_action == NULL)
453 rpc_delay(task, NFS4_POLL_RETRY_MAX);
457 static int nfs4_sequence_done(struct rpc_task *task,
458 struct nfs4_sequence_res *res)
460 if (res->sr_session == NULL)
462 return nfs41_sequence_done(task, res);
466 * nfs4_find_slot - efficiently look for a free slot
468 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
469 * If found, we mark the slot as used, update the highest_used_slotid,
470 * and respectively set up the sequence operation args.
471 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
473 * Note: must be called with under the slot_tbl_lock.
476 nfs4_find_slot(struct nfs4_slot_table *tbl)
479 u8 ret_id = NFS4_MAX_SLOT_TABLE;
480 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
482 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
483 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
485 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
486 if (slotid >= tbl->max_slots)
488 __set_bit(slotid, tbl->used_slots);
489 if (slotid > tbl->highest_used_slotid)
490 tbl->highest_used_slotid = slotid;
493 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
494 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
498 static int nfs41_setup_sequence(struct nfs4_session *session,
499 struct nfs4_sequence_args *args,
500 struct nfs4_sequence_res *res,
502 struct rpc_task *task)
504 struct nfs4_slot *slot;
505 struct nfs4_slot_table *tbl;
508 dprintk("--> %s\n", __func__);
509 /* slot already allocated? */
510 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
513 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
514 tbl = &session->fc_slot_table;
516 spin_lock(&tbl->slot_tbl_lock);
517 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
518 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
520 * The state manager will wait until the slot table is empty.
521 * Schedule the reset thread
523 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
524 spin_unlock(&tbl->slot_tbl_lock);
525 dprintk("%s Schedule Session Reset\n", __func__);
529 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
530 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
533 dprintk("%s enforce FIFO order\n", __func__);
537 slotid = nfs4_find_slot(tbl);
538 if (slotid == NFS4_MAX_SLOT_TABLE) {
539 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
540 spin_unlock(&tbl->slot_tbl_lock);
541 dprintk("<-- %s: no free slots\n", __func__);
544 spin_unlock(&tbl->slot_tbl_lock);
546 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
547 slot = tbl->slots + slotid;
548 args->sa_session = session;
549 args->sa_slotid = slotid;
550 args->sa_cache_this = cache_reply;
552 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
554 res->sr_session = session;
555 res->sr_slotid = slotid;
556 res->sr_renewal_time = jiffies;
557 res->sr_status_flags = 0;
559 * sr_status is only set in decode_sequence, and so will remain
560 * set to 1 if an rpc level failure occurs.
566 int nfs4_setup_sequence(const struct nfs_server *server,
567 struct nfs4_sequence_args *args,
568 struct nfs4_sequence_res *res,
570 struct rpc_task *task)
572 struct nfs4_session *session = nfs4_get_session(server);
575 if (session == NULL) {
576 args->sa_session = NULL;
577 res->sr_session = NULL;
581 dprintk("--> %s clp %p session %p sr_slotid %d\n",
582 __func__, session->clp, session, res->sr_slotid);
584 ret = nfs41_setup_sequence(session, args, res, cache_reply,
587 dprintk("<-- %s status=%d\n", __func__, ret);
591 struct nfs41_call_sync_data {
592 const struct nfs_server *seq_server;
593 struct nfs4_sequence_args *seq_args;
594 struct nfs4_sequence_res *seq_res;
598 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
600 struct nfs41_call_sync_data *data = calldata;
602 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
604 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
605 data->seq_res, data->cache_reply, task))
607 rpc_call_start(task);
610 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
612 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
613 nfs41_call_sync_prepare(task, calldata);
616 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
618 struct nfs41_call_sync_data *data = calldata;
620 nfs41_sequence_done(task, data->seq_res);
623 struct rpc_call_ops nfs41_call_sync_ops = {
624 .rpc_call_prepare = nfs41_call_sync_prepare,
625 .rpc_call_done = nfs41_call_sync_done,
628 struct rpc_call_ops nfs41_call_priv_sync_ops = {
629 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
630 .rpc_call_done = nfs41_call_sync_done,
633 static int nfs4_call_sync_sequence(struct nfs_server *server,
634 struct rpc_message *msg,
635 struct nfs4_sequence_args *args,
636 struct nfs4_sequence_res *res,
641 struct rpc_task *task;
642 struct nfs41_call_sync_data data = {
643 .seq_server = server,
646 .cache_reply = cache_reply,
648 struct rpc_task_setup task_setup = {
649 .rpc_client = server->client,
651 .callback_ops = &nfs41_call_sync_ops,
652 .callback_data = &data
655 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
657 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
658 task = rpc_run_task(&task_setup);
662 ret = task->tk_status;
668 int _nfs4_call_sync_session(struct nfs_server *server,
669 struct rpc_message *msg,
670 struct nfs4_sequence_args *args,
671 struct nfs4_sequence_res *res,
674 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
678 static int nfs4_sequence_done(struct rpc_task *task,
679 struct nfs4_sequence_res *res)
683 #endif /* CONFIG_NFS_V4_1 */
685 int _nfs4_call_sync(struct nfs_server *server,
686 struct rpc_message *msg,
687 struct nfs4_sequence_args *args,
688 struct nfs4_sequence_res *res,
691 args->sa_session = res->sr_session = NULL;
692 return rpc_call_sync(server->client, msg, 0);
695 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
696 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
697 &(res)->seq_res, (cache_reply))
699 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
701 struct nfs_inode *nfsi = NFS_I(dir);
703 spin_lock(&dir->i_lock);
704 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
705 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
706 nfs_force_lookup_revalidate(dir);
707 nfsi->change_attr = cinfo->after;
708 spin_unlock(&dir->i_lock);
711 struct nfs4_opendata {
713 struct nfs_openargs o_arg;
714 struct nfs_openres o_res;
715 struct nfs_open_confirmargs c_arg;
716 struct nfs_open_confirmres c_res;
717 struct nfs_fattr f_attr;
718 struct nfs_fattr dir_attr;
721 struct nfs4_state_owner *owner;
722 struct nfs4_state *state;
724 unsigned long timestamp;
725 unsigned int rpc_done : 1;
731 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
733 p->o_res.f_attr = &p->f_attr;
734 p->o_res.dir_attr = &p->dir_attr;
735 p->o_res.seqid = p->o_arg.seqid;
736 p->c_res.seqid = p->c_arg.seqid;
737 p->o_res.server = p->o_arg.server;
738 nfs_fattr_init(&p->f_attr);
739 nfs_fattr_init(&p->dir_attr);
740 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
743 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
744 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
745 const struct iattr *attrs,
748 struct dentry *parent = dget_parent(path->dentry);
749 struct inode *dir = parent->d_inode;
750 struct nfs_server *server = NFS_SERVER(dir);
751 struct nfs4_opendata *p;
753 p = kzalloc(sizeof(*p), gfp_mask);
756 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
757 if (p->o_arg.seqid == NULL)
763 atomic_inc(&sp->so_count);
764 p->o_arg.fh = NFS_FH(dir);
765 p->o_arg.open_flags = flags;
766 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
767 p->o_arg.clientid = server->nfs_client->cl_clientid;
768 p->o_arg.id = sp->so_owner_id.id;
769 p->o_arg.name = &p->path.dentry->d_name;
770 p->o_arg.server = server;
771 p->o_arg.bitmask = server->attr_bitmask;
772 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
773 if (flags & O_CREAT) {
776 p->o_arg.u.attrs = &p->attrs;
777 memcpy(&p->attrs, attrs, sizeof(p->attrs));
778 s = (u32 *) p->o_arg.u.verifier.data;
782 p->c_arg.fh = &p->o_res.fh;
783 p->c_arg.stateid = &p->o_res.stateid;
784 p->c_arg.seqid = p->o_arg.seqid;
785 nfs4_init_opendata_res(p);
795 static void nfs4_opendata_free(struct kref *kref)
797 struct nfs4_opendata *p = container_of(kref,
798 struct nfs4_opendata, kref);
800 nfs_free_seqid(p->o_arg.seqid);
801 if (p->state != NULL)
802 nfs4_put_open_state(p->state);
803 nfs4_put_state_owner(p->owner);
809 static void nfs4_opendata_put(struct nfs4_opendata *p)
812 kref_put(&p->kref, nfs4_opendata_free);
815 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
819 ret = rpc_wait_for_completion_task(task);
823 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
827 if (open_mode & O_EXCL)
829 switch (mode & (FMODE_READ|FMODE_WRITE)) {
831 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
832 && state->n_rdonly != 0;
835 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
836 && state->n_wronly != 0;
838 case FMODE_READ|FMODE_WRITE:
839 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
840 && state->n_rdwr != 0;
846 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
848 if ((delegation->type & fmode) != fmode)
850 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
852 nfs_mark_delegation_referenced(delegation);
856 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
865 case FMODE_READ|FMODE_WRITE:
868 nfs4_state_set_mode_locked(state, state->state | fmode);
871 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
873 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
874 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
875 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
878 set_bit(NFS_O_RDONLY_STATE, &state->flags);
881 set_bit(NFS_O_WRONLY_STATE, &state->flags);
883 case FMODE_READ|FMODE_WRITE:
884 set_bit(NFS_O_RDWR_STATE, &state->flags);
888 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
890 write_seqlock(&state->seqlock);
891 nfs_set_open_stateid_locked(state, stateid, fmode);
892 write_sequnlock(&state->seqlock);
895 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
898 * Protect the call to nfs4_state_set_mode_locked and
899 * serialise the stateid update
901 write_seqlock(&state->seqlock);
902 if (deleg_stateid != NULL) {
903 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
904 set_bit(NFS_DELEGATED_STATE, &state->flags);
906 if (open_stateid != NULL)
907 nfs_set_open_stateid_locked(state, open_stateid, fmode);
908 write_sequnlock(&state->seqlock);
909 spin_lock(&state->owner->so_lock);
910 update_open_stateflags(state, fmode);
911 spin_unlock(&state->owner->so_lock);
914 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
916 struct nfs_inode *nfsi = NFS_I(state->inode);
917 struct nfs_delegation *deleg_cur;
920 fmode &= (FMODE_READ|FMODE_WRITE);
923 deleg_cur = rcu_dereference(nfsi->delegation);
924 if (deleg_cur == NULL)
927 spin_lock(&deleg_cur->lock);
928 if (nfsi->delegation != deleg_cur ||
929 (deleg_cur->type & fmode) != fmode)
930 goto no_delegation_unlock;
932 if (delegation == NULL)
933 delegation = &deleg_cur->stateid;
934 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
935 goto no_delegation_unlock;
937 nfs_mark_delegation_referenced(deleg_cur);
938 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
940 no_delegation_unlock:
941 spin_unlock(&deleg_cur->lock);
945 if (!ret && open_stateid != NULL) {
946 __update_open_stateid(state, open_stateid, NULL, fmode);
954 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
956 struct nfs_delegation *delegation;
959 delegation = rcu_dereference(NFS_I(inode)->delegation);
960 if (delegation == NULL || (delegation->type & fmode) == fmode) {
965 nfs_inode_return_delegation(inode);
968 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
970 struct nfs4_state *state = opendata->state;
971 struct nfs_inode *nfsi = NFS_I(state->inode);
972 struct nfs_delegation *delegation;
973 int open_mode = opendata->o_arg.open_flags & O_EXCL;
974 fmode_t fmode = opendata->o_arg.fmode;
975 nfs4_stateid stateid;
979 if (can_open_cached(state, fmode, open_mode)) {
980 spin_lock(&state->owner->so_lock);
981 if (can_open_cached(state, fmode, open_mode)) {
982 update_open_stateflags(state, fmode);
983 spin_unlock(&state->owner->so_lock);
984 goto out_return_state;
986 spin_unlock(&state->owner->so_lock);
989 delegation = rcu_dereference(nfsi->delegation);
990 if (delegation == NULL ||
991 !can_open_delegated(delegation, fmode)) {
995 /* Save the delegation */
996 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
998 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1003 /* Try to update the stateid using the delegation */
1004 if (update_open_stateid(state, NULL, &stateid, fmode))
1005 goto out_return_state;
1008 return ERR_PTR(ret);
1010 atomic_inc(&state->count);
1014 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1016 struct inode *inode;
1017 struct nfs4_state *state = NULL;
1018 struct nfs_delegation *delegation;
1021 if (!data->rpc_done) {
1022 state = nfs4_try_open_cached(data);
1027 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1029 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1030 ret = PTR_ERR(inode);
1034 state = nfs4_get_open_state(inode, data->owner);
1037 if (data->o_res.delegation_type != 0) {
1038 int delegation_flags = 0;
1041 delegation = rcu_dereference(NFS_I(inode)->delegation);
1043 delegation_flags = delegation->flags;
1045 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1046 nfs_inode_set_delegation(state->inode,
1047 data->owner->so_cred,
1050 nfs_inode_reclaim_delegation(state->inode,
1051 data->owner->so_cred,
1055 update_open_stateid(state, &data->o_res.stateid, NULL,
1063 return ERR_PTR(ret);
1066 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1068 struct nfs_inode *nfsi = NFS_I(state->inode);
1069 struct nfs_open_context *ctx;
1071 spin_lock(&state->inode->i_lock);
1072 list_for_each_entry(ctx, &nfsi->open_files, list) {
1073 if (ctx->state != state)
1075 get_nfs_open_context(ctx);
1076 spin_unlock(&state->inode->i_lock);
1079 spin_unlock(&state->inode->i_lock);
1080 return ERR_PTR(-ENOENT);
1083 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1085 struct nfs4_opendata *opendata;
1087 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
1088 if (opendata == NULL)
1089 return ERR_PTR(-ENOMEM);
1090 opendata->state = state;
1091 atomic_inc(&state->count);
1095 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1097 struct nfs4_state *newstate;
1100 opendata->o_arg.open_flags = 0;
1101 opendata->o_arg.fmode = fmode;
1102 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1103 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1104 nfs4_init_opendata_res(opendata);
1105 ret = _nfs4_recover_proc_open(opendata);
1108 newstate = nfs4_opendata_to_nfs4_state(opendata);
1109 if (IS_ERR(newstate))
1110 return PTR_ERR(newstate);
1111 nfs4_close_state(&opendata->path, newstate, fmode);
1116 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1118 struct nfs4_state *newstate;
1121 /* memory barrier prior to reading state->n_* */
1122 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1124 if (state->n_rdwr != 0) {
1125 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1128 if (newstate != state)
1131 if (state->n_wronly != 0) {
1132 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1135 if (newstate != state)
1138 if (state->n_rdonly != 0) {
1139 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1142 if (newstate != state)
1146 * We may have performed cached opens for all three recoveries.
1147 * Check if we need to update the current stateid.
1149 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1150 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1151 write_seqlock(&state->seqlock);
1152 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1153 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1154 write_sequnlock(&state->seqlock);
1161 * reclaim state on the server after a reboot.
1163 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1165 struct nfs_delegation *delegation;
1166 struct nfs4_opendata *opendata;
1167 fmode_t delegation_type = 0;
1170 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1171 if (IS_ERR(opendata))
1172 return PTR_ERR(opendata);
1173 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1174 opendata->o_arg.fh = NFS_FH(state->inode);
1176 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1177 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1178 delegation_type = delegation->type;
1180 opendata->o_arg.u.delegation_type = delegation_type;
1181 status = nfs4_open_recover(opendata, state);
1182 nfs4_opendata_put(opendata);
1186 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1188 struct nfs_server *server = NFS_SERVER(state->inode);
1189 struct nfs4_exception exception = { };
1192 err = _nfs4_do_open_reclaim(ctx, state);
1193 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
1195 nfs4_handle_exception(server, err, &exception);
1196 } while (exception.retry);
1200 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1202 struct nfs_open_context *ctx;
1205 ctx = nfs4_state_find_open_context(state);
1207 return PTR_ERR(ctx);
1208 ret = nfs4_do_open_reclaim(ctx, state);
1209 put_nfs_open_context(ctx);
1213 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1215 struct nfs4_opendata *opendata;
1218 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1219 if (IS_ERR(opendata))
1220 return PTR_ERR(opendata);
1221 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1222 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1223 sizeof(opendata->o_arg.u.delegation.data));
1224 ret = nfs4_open_recover(opendata, state);
1225 nfs4_opendata_put(opendata);
1229 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1231 struct nfs4_exception exception = { };
1232 struct nfs_server *server = NFS_SERVER(state->inode);
1235 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1241 case -NFS4ERR_BADSESSION:
1242 case -NFS4ERR_BADSLOT:
1243 case -NFS4ERR_BAD_HIGH_SLOT:
1244 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1245 case -NFS4ERR_DEADSESSION:
1246 nfs4_schedule_state_recovery(
1247 server->nfs_client);
1249 case -NFS4ERR_STALE_CLIENTID:
1250 case -NFS4ERR_STALE_STATEID:
1251 case -NFS4ERR_EXPIRED:
1252 /* Don't recall a delegation if it was lost */
1253 nfs4_schedule_state_recovery(server->nfs_client);
1257 * The show must go on: exit, but mark the
1258 * stateid as needing recovery.
1260 case -NFS4ERR_ADMIN_REVOKED:
1261 case -NFS4ERR_BAD_STATEID:
1262 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1267 err = nfs4_handle_exception(server, err, &exception);
1268 } while (exception.retry);
1273 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1275 struct nfs4_opendata *data = calldata;
1277 data->rpc_status = task->tk_status;
1278 if (data->rpc_status == 0) {
1279 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1280 sizeof(data->o_res.stateid.data));
1281 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1282 renew_lease(data->o_res.server, data->timestamp);
1287 static void nfs4_open_confirm_release(void *calldata)
1289 struct nfs4_opendata *data = calldata;
1290 struct nfs4_state *state = NULL;
1292 /* If this request hasn't been cancelled, do nothing */
1293 if (data->cancelled == 0)
1295 /* In case of error, no cleanup! */
1296 if (!data->rpc_done)
1298 state = nfs4_opendata_to_nfs4_state(data);
1300 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1302 nfs4_opendata_put(data);
1305 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1306 .rpc_call_done = nfs4_open_confirm_done,
1307 .rpc_release = nfs4_open_confirm_release,
1311 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1313 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1315 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1316 struct rpc_task *task;
1317 struct rpc_message msg = {
1318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1319 .rpc_argp = &data->c_arg,
1320 .rpc_resp = &data->c_res,
1321 .rpc_cred = data->owner->so_cred,
1323 struct rpc_task_setup task_setup_data = {
1324 .rpc_client = server->client,
1325 .rpc_message = &msg,
1326 .callback_ops = &nfs4_open_confirm_ops,
1327 .callback_data = data,
1328 .workqueue = nfsiod_workqueue,
1329 .flags = RPC_TASK_ASYNC,
1333 kref_get(&data->kref);
1335 data->rpc_status = 0;
1336 data->timestamp = jiffies;
1337 task = rpc_run_task(&task_setup_data);
1339 return PTR_ERR(task);
1340 status = nfs4_wait_for_completion_rpc_task(task);
1342 data->cancelled = 1;
1345 status = data->rpc_status;
1350 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1352 struct nfs4_opendata *data = calldata;
1353 struct nfs4_state_owner *sp = data->owner;
1355 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1358 * Check if we still need to send an OPEN call, or if we can use
1359 * a delegation instead.
1361 if (data->state != NULL) {
1362 struct nfs_delegation *delegation;
1364 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1367 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1368 if (delegation != NULL &&
1369 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1375 /* Update sequence id. */
1376 data->o_arg.id = sp->so_owner_id.id;
1377 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1378 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1379 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1380 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1382 data->timestamp = jiffies;
1383 if (nfs4_setup_sequence(data->o_arg.server,
1384 &data->o_arg.seq_args,
1385 &data->o_res.seq_res, 1, task))
1387 rpc_call_start(task);
1390 task->tk_action = NULL;
1394 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1396 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1397 nfs4_open_prepare(task, calldata);
1400 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1402 struct nfs4_opendata *data = calldata;
1404 data->rpc_status = task->tk_status;
1406 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1409 if (task->tk_status == 0) {
1410 switch (data->o_res.f_attr->mode & S_IFMT) {
1414 data->rpc_status = -ELOOP;
1417 data->rpc_status = -EISDIR;
1420 data->rpc_status = -ENOTDIR;
1422 renew_lease(data->o_res.server, data->timestamp);
1423 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1424 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1429 static void nfs4_open_release(void *calldata)
1431 struct nfs4_opendata *data = calldata;
1432 struct nfs4_state *state = NULL;
1434 /* If this request hasn't been cancelled, do nothing */
1435 if (data->cancelled == 0)
1437 /* In case of error, no cleanup! */
1438 if (data->rpc_status != 0 || !data->rpc_done)
1440 /* In case we need an open_confirm, no cleanup! */
1441 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1443 state = nfs4_opendata_to_nfs4_state(data);
1445 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1447 nfs4_opendata_put(data);
1450 static const struct rpc_call_ops nfs4_open_ops = {
1451 .rpc_call_prepare = nfs4_open_prepare,
1452 .rpc_call_done = nfs4_open_done,
1453 .rpc_release = nfs4_open_release,
1456 static const struct rpc_call_ops nfs4_recover_open_ops = {
1457 .rpc_call_prepare = nfs4_recover_open_prepare,
1458 .rpc_call_done = nfs4_open_done,
1459 .rpc_release = nfs4_open_release,
1462 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1464 struct inode *dir = data->dir->d_inode;
1465 struct nfs_server *server = NFS_SERVER(dir);
1466 struct nfs_openargs *o_arg = &data->o_arg;
1467 struct nfs_openres *o_res = &data->o_res;
1468 struct rpc_task *task;
1469 struct rpc_message msg = {
1470 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1473 .rpc_cred = data->owner->so_cred,
1475 struct rpc_task_setup task_setup_data = {
1476 .rpc_client = server->client,
1477 .rpc_message = &msg,
1478 .callback_ops = &nfs4_open_ops,
1479 .callback_data = data,
1480 .workqueue = nfsiod_workqueue,
1481 .flags = RPC_TASK_ASYNC,
1485 kref_get(&data->kref);
1487 data->rpc_status = 0;
1488 data->cancelled = 0;
1490 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1491 task = rpc_run_task(&task_setup_data);
1493 return PTR_ERR(task);
1494 status = nfs4_wait_for_completion_rpc_task(task);
1496 data->cancelled = 1;
1499 status = data->rpc_status;
1505 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1507 struct inode *dir = data->dir->d_inode;
1508 struct nfs_openres *o_res = &data->o_res;
1511 status = nfs4_run_open_task(data, 1);
1512 if (status != 0 || !data->rpc_done)
1515 nfs_refresh_inode(dir, o_res->dir_attr);
1517 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1518 status = _nfs4_proc_open_confirm(data);
1527 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1529 static int _nfs4_proc_open(struct nfs4_opendata *data)
1531 struct inode *dir = data->dir->d_inode;
1532 struct nfs_server *server = NFS_SERVER(dir);
1533 struct nfs_openargs *o_arg = &data->o_arg;
1534 struct nfs_openres *o_res = &data->o_res;
1537 status = nfs4_run_open_task(data, 0);
1538 if (status != 0 || !data->rpc_done)
1541 if (o_arg->open_flags & O_CREAT) {
1542 update_changeattr(dir, &o_res->cinfo);
1543 nfs_post_op_update_inode(dir, o_res->dir_attr);
1545 nfs_refresh_inode(dir, o_res->dir_attr);
1546 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1547 server->caps &= ~NFS_CAP_POSIX_LOCK;
1548 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1549 status = _nfs4_proc_open_confirm(data);
1553 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1554 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1558 static int nfs4_recover_expired_lease(struct nfs_server *server)
1560 struct nfs_client *clp = server->nfs_client;
1564 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1565 ret = nfs4_wait_clnt_recover(clp);
1568 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1569 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1571 nfs4_schedule_state_recovery(clp);
1579 * reclaim state on the server after a network partition.
1580 * Assumes caller holds the appropriate lock
1582 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1584 struct nfs4_opendata *opendata;
1587 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1588 if (IS_ERR(opendata))
1589 return PTR_ERR(opendata);
1590 ret = nfs4_open_recover(opendata, state);
1592 d_drop(ctx->path.dentry);
1593 nfs4_opendata_put(opendata);
1597 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1599 struct nfs_server *server = NFS_SERVER(state->inode);
1600 struct nfs4_exception exception = { };
1604 err = _nfs4_open_expired(ctx, state);
1608 case -NFS4ERR_GRACE:
1609 case -NFS4ERR_DELAY:
1611 nfs4_handle_exception(server, err, &exception);
1614 } while (exception.retry);
1619 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1621 struct nfs_open_context *ctx;
1624 ctx = nfs4_state_find_open_context(state);
1626 return PTR_ERR(ctx);
1627 ret = nfs4_do_open_expired(ctx, state);
1628 put_nfs_open_context(ctx);
1633 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1634 * fields corresponding to attributes that were used to store the verifier.
1635 * Make sure we clobber those fields in the later setattr call
1637 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1639 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1640 !(sattr->ia_valid & ATTR_ATIME_SET))
1641 sattr->ia_valid |= ATTR_ATIME;
1643 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1644 !(sattr->ia_valid & ATTR_MTIME_SET))
1645 sattr->ia_valid |= ATTR_MTIME;
1649 * Returns a referenced nfs4_state
1651 static int _nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1653 struct nfs4_state_owner *sp;
1654 struct nfs4_state *state = NULL;
1655 struct nfs_server *server = NFS_SERVER(dir);
1656 struct nfs4_opendata *opendata;
1659 /* Protect against reboot recovery conflicts */
1661 if (!(sp = nfs4_get_state_owner(server, cred))) {
1662 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1665 status = nfs4_recover_expired_lease(server);
1667 goto err_put_state_owner;
1668 if (path->dentry->d_inode != NULL)
1669 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1671 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
1672 if (opendata == NULL)
1673 goto err_put_state_owner;
1675 if (path->dentry->d_inode != NULL)
1676 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1678 status = _nfs4_proc_open(opendata);
1680 goto err_opendata_put;
1682 state = nfs4_opendata_to_nfs4_state(opendata);
1683 status = PTR_ERR(state);
1685 goto err_opendata_put;
1686 if (server->caps & NFS_CAP_POSIX_LOCK)
1687 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1689 if (opendata->o_arg.open_flags & O_EXCL) {
1690 nfs4_exclusive_attrset(opendata, sattr);
1692 nfs_fattr_init(opendata->o_res.f_attr);
1693 status = nfs4_do_setattr(state->inode, cred,
1694 opendata->o_res.f_attr, sattr,
1697 nfs_setattr_update_inode(state->inode, sattr);
1698 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1700 nfs4_opendata_put(opendata);
1701 nfs4_put_state_owner(sp);
1705 nfs4_opendata_put(opendata);
1706 err_put_state_owner:
1707 nfs4_put_state_owner(sp);
1714 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, fmode_t fmode, int flags, struct iattr *sattr, struct rpc_cred *cred)
1716 struct nfs4_exception exception = { };
1717 struct nfs4_state *res;
1721 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1724 /* NOTE: BAD_SEQID means the server and client disagree about the
1725 * book-keeping w.r.t. state-changing operations
1726 * (OPEN/CLOSE/LOCK/LOCKU...)
1727 * It is actually a sign of a bug on the client or on the server.
1729 * If we receive a BAD_SEQID error in the particular case of
1730 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1731 * have unhashed the old state_owner for us, and that we can
1732 * therefore safely retry using a new one. We should still warn
1733 * the user though...
1735 if (status == -NFS4ERR_BAD_SEQID) {
1736 printk(KERN_WARNING "NFS: v4 server %s "
1737 " returned a bad sequence-id error!\n",
1738 NFS_SERVER(dir)->nfs_client->cl_hostname);
1739 exception.retry = 1;
1743 * BAD_STATEID on OPEN means that the server cancelled our
1744 * state before it received the OPEN_CONFIRM.
1745 * Recover by retrying the request as per the discussion
1746 * on Page 181 of RFC3530.
1748 if (status == -NFS4ERR_BAD_STATEID) {
1749 exception.retry = 1;
1752 if (status == -EAGAIN) {
1753 /* We must have found a delegation */
1754 exception.retry = 1;
1757 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1758 status, &exception));
1759 } while (exception.retry);
1763 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1764 struct nfs_fattr *fattr, struct iattr *sattr,
1765 struct nfs4_state *state)
1767 struct nfs_server *server = NFS_SERVER(inode);
1768 struct nfs_setattrargs arg = {
1769 .fh = NFS_FH(inode),
1772 .bitmask = server->attr_bitmask,
1774 struct nfs_setattrres res = {
1778 struct rpc_message msg = {
1779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1784 unsigned long timestamp = jiffies;
1787 nfs_fattr_init(fattr);
1789 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1790 /* Use that stateid */
1791 } else if (state != NULL) {
1792 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1794 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1796 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1797 if (status == 0 && state != NULL)
1798 renew_lease(server, timestamp);
1802 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1803 struct nfs_fattr *fattr, struct iattr *sattr,
1804 struct nfs4_state *state)
1806 struct nfs_server *server = NFS_SERVER(inode);
1807 struct nfs4_exception exception = { };
1810 err = nfs4_handle_exception(server,
1811 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1813 } while (exception.retry);
1817 struct nfs4_closedata {
1819 struct inode *inode;
1820 struct nfs4_state *state;
1821 struct nfs_closeargs arg;
1822 struct nfs_closeres res;
1823 struct nfs_fattr fattr;
1824 unsigned long timestamp;
1827 static void nfs4_free_closedata(void *data)
1829 struct nfs4_closedata *calldata = data;
1830 struct nfs4_state_owner *sp = calldata->state->owner;
1832 nfs4_put_open_state(calldata->state);
1833 nfs_free_seqid(calldata->arg.seqid);
1834 nfs4_put_state_owner(sp);
1835 path_put(&calldata->path);
1839 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1842 spin_lock(&state->owner->so_lock);
1843 if (!(fmode & FMODE_READ))
1844 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1845 if (!(fmode & FMODE_WRITE))
1846 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1847 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1848 spin_unlock(&state->owner->so_lock);
1851 static void nfs4_close_done(struct rpc_task *task, void *data)
1853 struct nfs4_closedata *calldata = data;
1854 struct nfs4_state *state = calldata->state;
1855 struct nfs_server *server = NFS_SERVER(calldata->inode);
1857 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1859 /* hmm. we are done with the inode, and in the process of freeing
1860 * the state_owner. we keep this around to process errors
1862 switch (task->tk_status) {
1864 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1865 renew_lease(server, calldata->timestamp);
1866 nfs4_close_clear_stateid_flags(state,
1867 calldata->arg.fmode);
1869 case -NFS4ERR_STALE_STATEID:
1870 case -NFS4ERR_OLD_STATEID:
1871 case -NFS4ERR_BAD_STATEID:
1872 case -NFS4ERR_EXPIRED:
1873 if (calldata->arg.fmode == 0)
1876 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1877 rpc_restart_call_prepare(task);
1879 nfs_release_seqid(calldata->arg.seqid);
1880 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1883 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1885 struct nfs4_closedata *calldata = data;
1886 struct nfs4_state *state = calldata->state;
1889 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1892 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1893 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
1894 spin_lock(&state->owner->so_lock);
1895 /* Calculate the change in open mode */
1896 if (state->n_rdwr == 0) {
1897 if (state->n_rdonly == 0) {
1898 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1899 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1900 calldata->arg.fmode &= ~FMODE_READ;
1902 if (state->n_wronly == 0) {
1903 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1904 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1905 calldata->arg.fmode &= ~FMODE_WRITE;
1908 spin_unlock(&state->owner->so_lock);
1911 /* Note: exit _without_ calling nfs4_close_done */
1912 task->tk_action = NULL;
1916 if (calldata->arg.fmode == 0)
1917 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1919 nfs_fattr_init(calldata->res.fattr);
1920 calldata->timestamp = jiffies;
1921 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
1922 &calldata->arg.seq_args, &calldata->res.seq_res,
1925 rpc_call_start(task);
1928 static const struct rpc_call_ops nfs4_close_ops = {
1929 .rpc_call_prepare = nfs4_close_prepare,
1930 .rpc_call_done = nfs4_close_done,
1931 .rpc_release = nfs4_free_closedata,
1935 * It is possible for data to be read/written from a mem-mapped file
1936 * after the sys_close call (which hits the vfs layer as a flush).
1937 * This means that we can't safely call nfsv4 close on a file until
1938 * the inode is cleared. This in turn means that we are not good
1939 * NFSv4 citizens - we do not indicate to the server to update the file's
1940 * share state even when we are done with one of the three share
1941 * stateid's in the inode.
1943 * NOTE: Caller must be holding the sp->so_owner semaphore!
1945 int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait)
1947 struct nfs_server *server = NFS_SERVER(state->inode);
1948 struct nfs4_closedata *calldata;
1949 struct nfs4_state_owner *sp = state->owner;
1950 struct rpc_task *task;
1951 struct rpc_message msg = {
1952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1953 .rpc_cred = state->owner->so_cred,
1955 struct rpc_task_setup task_setup_data = {
1956 .rpc_client = server->client,
1957 .rpc_message = &msg,
1958 .callback_ops = &nfs4_close_ops,
1959 .workqueue = nfsiod_workqueue,
1960 .flags = RPC_TASK_ASYNC,
1962 int status = -ENOMEM;
1964 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1965 if (calldata == NULL)
1967 calldata->inode = state->inode;
1968 calldata->state = state;
1969 calldata->arg.fh = NFS_FH(state->inode);
1970 calldata->arg.stateid = &state->open_stateid;
1971 /* Serialization for the sequence id */
1972 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
1973 if (calldata->arg.seqid == NULL)
1974 goto out_free_calldata;
1975 calldata->arg.fmode = 0;
1976 calldata->arg.bitmask = server->cache_consistency_bitmask;
1977 calldata->res.fattr = &calldata->fattr;
1978 calldata->res.seqid = calldata->arg.seqid;
1979 calldata->res.server = server;
1980 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1982 calldata->path = *path;
1984 msg.rpc_argp = &calldata->arg,
1985 msg.rpc_resp = &calldata->res,
1986 task_setup_data.callback_data = calldata;
1987 task = rpc_run_task(&task_setup_data);
1989 return PTR_ERR(task);
1992 status = rpc_wait_for_completion_task(task);
1998 nfs4_put_open_state(state);
1999 nfs4_put_state_owner(sp);
2003 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
2008 /* If the open_intent is for execute, we have an extra check to make */
2009 if (fmode & FMODE_EXEC) {
2010 ret = nfs_may_open(state->inode,
2011 state->owner->so_cred,
2012 nd->intent.open.flags);
2016 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
2017 if (!IS_ERR(filp)) {
2018 struct nfs_open_context *ctx;
2019 ctx = nfs_file_open_context(filp);
2023 ret = PTR_ERR(filp);
2025 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
2030 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
2032 struct path path = {
2033 .mnt = nd->path.mnt,
2036 struct dentry *parent;
2038 struct rpc_cred *cred;
2039 struct nfs4_state *state;
2041 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
2043 if (nd->flags & LOOKUP_CREATE) {
2044 attr.ia_mode = nd->intent.open.create_mode;
2045 attr.ia_valid = ATTR_MODE;
2046 if (!IS_POSIXACL(dir))
2047 attr.ia_mode &= ~current_umask();
2050 BUG_ON(nd->intent.open.flags & O_CREAT);
2053 cred = rpc_lookup_cred();
2055 return (struct dentry *)cred;
2056 parent = dentry->d_parent;
2057 /* Protect against concurrent sillydeletes */
2058 nfs_block_sillyrename(parent);
2059 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
2061 if (IS_ERR(state)) {
2062 if (PTR_ERR(state) == -ENOENT) {
2063 d_add(dentry, NULL);
2064 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2066 nfs_unblock_sillyrename(parent);
2067 return (struct dentry *)state;
2069 res = d_add_unique(dentry, igrab(state->inode));
2072 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
2073 nfs_unblock_sillyrename(parent);
2074 nfs4_intent_set_file(nd, &path, state, fmode);
2079 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
2081 struct path path = {
2082 .mnt = nd->path.mnt,
2085 struct rpc_cred *cred;
2086 struct nfs4_state *state;
2087 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
2089 cred = rpc_lookup_cred();
2091 return PTR_ERR(cred);
2092 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
2094 if (IS_ERR(state)) {
2095 switch (PTR_ERR(state)) {
2101 return PTR_ERR(state);
2106 if (state->inode == dentry->d_inode) {
2107 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2108 nfs4_intent_set_file(nd, &path, state, fmode);
2111 nfs4_close_sync(&path, state, fmode);
2117 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2119 if (ctx->state == NULL)
2122 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2124 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2127 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2129 struct nfs4_server_caps_arg args = {
2132 struct nfs4_server_caps_res res = {};
2133 struct rpc_message msg = {
2134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2140 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2142 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2143 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2144 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2145 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2146 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2147 NFS_CAP_CTIME|NFS_CAP_MTIME);
2148 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2149 server->caps |= NFS_CAP_ACLS;
2150 if (res.has_links != 0)
2151 server->caps |= NFS_CAP_HARDLINKS;
2152 if (res.has_symlinks != 0)
2153 server->caps |= NFS_CAP_SYMLINKS;
2154 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2155 server->caps |= NFS_CAP_FILEID;
2156 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2157 server->caps |= NFS_CAP_MODE;
2158 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2159 server->caps |= NFS_CAP_NLINK;
2160 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2161 server->caps |= NFS_CAP_OWNER;
2162 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2163 server->caps |= NFS_CAP_OWNER_GROUP;
2164 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2165 server->caps |= NFS_CAP_ATIME;
2166 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2167 server->caps |= NFS_CAP_CTIME;
2168 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2169 server->caps |= NFS_CAP_MTIME;
2171 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2172 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2173 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2174 server->acl_bitmask = res.acl_bitmask;
2180 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2182 struct nfs4_exception exception = { };
2185 err = nfs4_handle_exception(server,
2186 _nfs4_server_capabilities(server, fhandle),
2188 } while (exception.retry);
2192 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2193 struct nfs_fsinfo *info)
2195 struct nfs4_lookup_root_arg args = {
2196 .bitmask = nfs4_fattr_bitmap,
2198 struct nfs4_lookup_res res = {
2200 .fattr = info->fattr,
2203 struct rpc_message msg = {
2204 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2209 nfs_fattr_init(info->fattr);
2210 return nfs4_call_sync(server, &msg, &args, &res, 0);
2213 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2214 struct nfs_fsinfo *info)
2216 struct nfs4_exception exception = { };
2219 err = nfs4_handle_exception(server,
2220 _nfs4_lookup_root(server, fhandle, info),
2222 } while (exception.retry);
2227 * get the file handle for the "/" directory on the server
2229 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2230 struct nfs_fsinfo *info)
2234 status = nfs4_lookup_root(server, fhandle, info);
2236 status = nfs4_server_capabilities(server, fhandle);
2238 status = nfs4_do_fsinfo(server, fhandle, info);
2239 return nfs4_map_errors(status);
2243 * Get locations and (maybe) other attributes of a referral.
2244 * Note that we'll actually follow the referral later when
2245 * we detect fsid mismatch in inode revalidation
2247 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2249 int status = -ENOMEM;
2250 struct page *page = NULL;
2251 struct nfs4_fs_locations *locations = NULL;
2253 page = alloc_page(GFP_KERNEL);
2256 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2257 if (locations == NULL)
2260 status = nfs4_proc_fs_locations(dir, name, locations, page);
2263 /* Make sure server returned a different fsid for the referral */
2264 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2265 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2270 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2271 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2273 fattr->mode = S_IFDIR;
2274 memset(fhandle, 0, sizeof(struct nfs_fh));
2283 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2285 struct nfs4_getattr_arg args = {
2287 .bitmask = server->attr_bitmask,
2289 struct nfs4_getattr_res res = {
2293 struct rpc_message msg = {
2294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2299 nfs_fattr_init(fattr);
2300 return nfs4_call_sync(server, &msg, &args, &res, 0);
2303 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2305 struct nfs4_exception exception = { };
2308 err = nfs4_handle_exception(server,
2309 _nfs4_proc_getattr(server, fhandle, fattr),
2311 } while (exception.retry);
2316 * The file is not closed if it is opened due to the a request to change
2317 * the size of the file. The open call will not be needed once the
2318 * VFS layer lookup-intents are implemented.
2320 * Close is called when the inode is destroyed.
2321 * If we haven't opened the file for O_WRONLY, we
2322 * need to in the size_change case to obtain a stateid.
2325 * Because OPEN is always done by name in nfsv4, it is
2326 * possible that we opened a different file by the same
2327 * name. We can recognize this race condition, but we
2328 * can't do anything about it besides returning an error.
2330 * This will be fixed with VFS changes (lookup-intent).
2333 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2334 struct iattr *sattr)
2336 struct inode *inode = dentry->d_inode;
2337 struct rpc_cred *cred = NULL;
2338 struct nfs4_state *state = NULL;
2341 nfs_fattr_init(fattr);
2343 /* Search for an existing open(O_WRITE) file */
2344 if (sattr->ia_valid & ATTR_FILE) {
2345 struct nfs_open_context *ctx;
2347 ctx = nfs_file_open_context(sattr->ia_file);
2354 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2356 nfs_setattr_update_inode(inode, sattr);
2360 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2361 const struct qstr *name, struct nfs_fh *fhandle,
2362 struct nfs_fattr *fattr)
2365 struct nfs4_lookup_arg args = {
2366 .bitmask = server->attr_bitmask,
2370 struct nfs4_lookup_res res = {
2375 struct rpc_message msg = {
2376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2381 nfs_fattr_init(fattr);
2383 dprintk("NFS call lookupfh %s\n", name->name);
2384 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2385 dprintk("NFS reply lookupfh: %d\n", status);
2389 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2390 struct qstr *name, struct nfs_fh *fhandle,
2391 struct nfs_fattr *fattr)
2393 struct nfs4_exception exception = { };
2396 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2398 if (err == -NFS4ERR_MOVED) {
2402 err = nfs4_handle_exception(server, err, &exception);
2403 } while (exception.retry);
2407 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2408 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2412 dprintk("NFS call lookup %s\n", name->name);
2413 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2414 if (status == -NFS4ERR_MOVED)
2415 status = nfs4_get_referral(dir, name, fattr, fhandle);
2416 dprintk("NFS reply lookup: %d\n", status);
2420 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2422 struct nfs4_exception exception = { };
2425 err = nfs4_handle_exception(NFS_SERVER(dir),
2426 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2428 } while (exception.retry);
2432 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2434 struct nfs_server *server = NFS_SERVER(inode);
2435 struct nfs4_accessargs args = {
2436 .fh = NFS_FH(inode),
2437 .bitmask = server->attr_bitmask,
2439 struct nfs4_accessres res = {
2442 struct rpc_message msg = {
2443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2446 .rpc_cred = entry->cred,
2448 int mode = entry->mask;
2452 * Determine which access bits we want to ask for...
2454 if (mode & MAY_READ)
2455 args.access |= NFS4_ACCESS_READ;
2456 if (S_ISDIR(inode->i_mode)) {
2457 if (mode & MAY_WRITE)
2458 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2459 if (mode & MAY_EXEC)
2460 args.access |= NFS4_ACCESS_LOOKUP;
2462 if (mode & MAY_WRITE)
2463 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2464 if (mode & MAY_EXEC)
2465 args.access |= NFS4_ACCESS_EXECUTE;
2468 res.fattr = nfs_alloc_fattr();
2469 if (res.fattr == NULL)
2472 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2475 if (res.access & NFS4_ACCESS_READ)
2476 entry->mask |= MAY_READ;
2477 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2478 entry->mask |= MAY_WRITE;
2479 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2480 entry->mask |= MAY_EXEC;
2481 nfs_refresh_inode(inode, res.fattr);
2483 nfs_free_fattr(res.fattr);
2487 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2489 struct nfs4_exception exception = { };
2492 err = nfs4_handle_exception(NFS_SERVER(inode),
2493 _nfs4_proc_access(inode, entry),
2495 } while (exception.retry);
2500 * TODO: For the time being, we don't try to get any attributes
2501 * along with any of the zero-copy operations READ, READDIR,
2504 * In the case of the first three, we want to put the GETATTR
2505 * after the read-type operation -- this is because it is hard
2506 * to predict the length of a GETATTR response in v4, and thus
2507 * align the READ data correctly. This means that the GETATTR
2508 * may end up partially falling into the page cache, and we should
2509 * shift it into the 'tail' of the xdr_buf before processing.
2510 * To do this efficiently, we need to know the total length
2511 * of data received, which doesn't seem to be available outside
2514 * In the case of WRITE, we also want to put the GETATTR after
2515 * the operation -- in this case because we want to make sure
2516 * we get the post-operation mtime and size. This means that
2517 * we can't use xdr_encode_pages() as written: we need a variant
2518 * of it which would leave room in the 'tail' iovec.
2520 * Both of these changes to the XDR layer would in fact be quite
2521 * minor, but I decided to leave them for a subsequent patch.
2523 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2524 unsigned int pgbase, unsigned int pglen)
2526 struct nfs4_readlink args = {
2527 .fh = NFS_FH(inode),
2532 struct nfs4_readlink_res res;
2533 struct rpc_message msg = {
2534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2539 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2542 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2543 unsigned int pgbase, unsigned int pglen)
2545 struct nfs4_exception exception = { };
2548 err = nfs4_handle_exception(NFS_SERVER(inode),
2549 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2551 } while (exception.retry);
2557 * We will need to arrange for the VFS layer to provide an atomic open.
2558 * Until then, this create/open method is prone to inefficiency and race
2559 * conditions due to the lookup, create, and open VFS calls from sys_open()
2560 * placed on the wire.
2562 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2563 * The file will be opened again in the subsequent VFS open call
2564 * (nfs4_proc_file_open).
2566 * The open for read will just hang around to be used by any process that
2567 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2571 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2572 int flags, struct nameidata *nd)
2574 struct path path = {
2575 .mnt = nd->path.mnt,
2578 struct nfs4_state *state;
2579 struct rpc_cred *cred;
2580 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2583 cred = rpc_lookup_cred();
2585 status = PTR_ERR(cred);
2588 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2590 if (IS_ERR(state)) {
2591 status = PTR_ERR(state);
2594 d_add(dentry, igrab(state->inode));
2595 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2596 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2597 status = nfs4_intent_set_file(nd, &path, state, fmode);
2599 nfs4_close_sync(&path, state, fmode);
2606 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2608 struct nfs_server *server = NFS_SERVER(dir);
2609 struct nfs_removeargs args = {
2611 .name.len = name->len,
2612 .name.name = name->name,
2613 .bitmask = server->attr_bitmask,
2615 struct nfs_removeres res = {
2618 struct rpc_message msg = {
2619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2623 int status = -ENOMEM;
2625 res.dir_attr = nfs_alloc_fattr();
2626 if (res.dir_attr == NULL)
2629 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2631 update_changeattr(dir, &res.cinfo);
2632 nfs_post_op_update_inode(dir, res.dir_attr);
2634 nfs_free_fattr(res.dir_attr);
2639 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2641 struct nfs4_exception exception = { };
2644 err = nfs4_handle_exception(NFS_SERVER(dir),
2645 _nfs4_proc_remove(dir, name),
2647 } while (exception.retry);
2651 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2653 struct nfs_server *server = NFS_SERVER(dir);
2654 struct nfs_removeargs *args = msg->rpc_argp;
2655 struct nfs_removeres *res = msg->rpc_resp;
2657 args->bitmask = server->cache_consistency_bitmask;
2658 res->server = server;
2659 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2662 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2664 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2666 if (!nfs4_sequence_done(task, &res->seq_res))
2668 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2670 update_changeattr(dir, &res->cinfo);
2671 nfs_post_op_update_inode(dir, res->dir_attr);
2675 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2676 struct inode *new_dir, struct qstr *new_name)
2678 struct nfs_server *server = NFS_SERVER(old_dir);
2679 struct nfs4_rename_arg arg = {
2680 .old_dir = NFS_FH(old_dir),
2681 .new_dir = NFS_FH(new_dir),
2682 .old_name = old_name,
2683 .new_name = new_name,
2684 .bitmask = server->attr_bitmask,
2686 struct nfs4_rename_res res = {
2689 struct rpc_message msg = {
2690 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2694 int status = -ENOMEM;
2696 res.old_fattr = nfs_alloc_fattr();
2697 res.new_fattr = nfs_alloc_fattr();
2698 if (res.old_fattr == NULL || res.new_fattr == NULL)
2701 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2703 update_changeattr(old_dir, &res.old_cinfo);
2704 nfs_post_op_update_inode(old_dir, res.old_fattr);
2705 update_changeattr(new_dir, &res.new_cinfo);
2706 nfs_post_op_update_inode(new_dir, res.new_fattr);
2709 nfs_free_fattr(res.new_fattr);
2710 nfs_free_fattr(res.old_fattr);
2714 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2715 struct inode *new_dir, struct qstr *new_name)
2717 struct nfs4_exception exception = { };
2720 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2721 _nfs4_proc_rename(old_dir, old_name,
2724 } while (exception.retry);
2728 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2730 struct nfs_server *server = NFS_SERVER(inode);
2731 struct nfs4_link_arg arg = {
2732 .fh = NFS_FH(inode),
2733 .dir_fh = NFS_FH(dir),
2735 .bitmask = server->attr_bitmask,
2737 struct nfs4_link_res res = {
2740 struct rpc_message msg = {
2741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2745 int status = -ENOMEM;
2747 res.fattr = nfs_alloc_fattr();
2748 res.dir_attr = nfs_alloc_fattr();
2749 if (res.fattr == NULL || res.dir_attr == NULL)
2752 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2754 update_changeattr(dir, &res.cinfo);
2755 nfs_post_op_update_inode(dir, res.dir_attr);
2756 nfs_post_op_update_inode(inode, res.fattr);
2759 nfs_free_fattr(res.dir_attr);
2760 nfs_free_fattr(res.fattr);
2764 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2766 struct nfs4_exception exception = { };
2769 err = nfs4_handle_exception(NFS_SERVER(inode),
2770 _nfs4_proc_link(inode, dir, name),
2772 } while (exception.retry);
2776 struct nfs4_createdata {
2777 struct rpc_message msg;
2778 struct nfs4_create_arg arg;
2779 struct nfs4_create_res res;
2781 struct nfs_fattr fattr;
2782 struct nfs_fattr dir_fattr;
2785 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2786 struct qstr *name, struct iattr *sattr, u32 ftype)
2788 struct nfs4_createdata *data;
2790 data = kzalloc(sizeof(*data), GFP_KERNEL);
2792 struct nfs_server *server = NFS_SERVER(dir);
2794 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2795 data->msg.rpc_argp = &data->arg;
2796 data->msg.rpc_resp = &data->res;
2797 data->arg.dir_fh = NFS_FH(dir);
2798 data->arg.server = server;
2799 data->arg.name = name;
2800 data->arg.attrs = sattr;
2801 data->arg.ftype = ftype;
2802 data->arg.bitmask = server->attr_bitmask;
2803 data->res.server = server;
2804 data->res.fh = &data->fh;
2805 data->res.fattr = &data->fattr;
2806 data->res.dir_fattr = &data->dir_fattr;
2807 nfs_fattr_init(data->res.fattr);
2808 nfs_fattr_init(data->res.dir_fattr);
2813 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2815 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2816 &data->arg, &data->res, 1);
2818 update_changeattr(dir, &data->res.dir_cinfo);
2819 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2820 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2825 static void nfs4_free_createdata(struct nfs4_createdata *data)
2830 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2831 struct page *page, unsigned int len, struct iattr *sattr)
2833 struct nfs4_createdata *data;
2834 int status = -ENAMETOOLONG;
2836 if (len > NFS4_MAXPATHLEN)
2840 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2844 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2845 data->arg.u.symlink.pages = &page;
2846 data->arg.u.symlink.len = len;
2848 status = nfs4_do_create(dir, dentry, data);
2850 nfs4_free_createdata(data);
2855 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2856 struct page *page, unsigned int len, struct iattr *sattr)
2858 struct nfs4_exception exception = { };
2861 err = nfs4_handle_exception(NFS_SERVER(dir),
2862 _nfs4_proc_symlink(dir, dentry, page,
2865 } while (exception.retry);
2869 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2870 struct iattr *sattr)
2872 struct nfs4_createdata *data;
2873 int status = -ENOMEM;
2875 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2879 status = nfs4_do_create(dir, dentry, data);
2881 nfs4_free_createdata(data);
2886 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2887 struct iattr *sattr)
2889 struct nfs4_exception exception = { };
2892 err = nfs4_handle_exception(NFS_SERVER(dir),
2893 _nfs4_proc_mkdir(dir, dentry, sattr),
2895 } while (exception.retry);
2899 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2900 u64 cookie, struct page *page, unsigned int count, int plus)
2902 struct inode *dir = dentry->d_inode;
2903 struct nfs4_readdir_arg args = {
2908 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2910 struct nfs4_readdir_res res;
2911 struct rpc_message msg = {
2912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2919 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2920 dentry->d_parent->d_name.name,
2921 dentry->d_name.name,
2922 (unsigned long long)cookie);
2923 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2924 res.pgbase = args.pgbase;
2925 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2927 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2929 nfs_invalidate_atime(dir);
2931 dprintk("%s: returns %d\n", __func__, status);
2935 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2936 u64 cookie, struct page *page, unsigned int count, int plus)
2938 struct nfs4_exception exception = { };
2941 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2942 _nfs4_proc_readdir(dentry, cred, cookie,
2945 } while (exception.retry);
2949 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2950 struct iattr *sattr, dev_t rdev)
2952 struct nfs4_createdata *data;
2953 int mode = sattr->ia_mode;
2954 int status = -ENOMEM;
2956 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2957 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2959 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2964 data->arg.ftype = NF4FIFO;
2965 else if (S_ISBLK(mode)) {
2966 data->arg.ftype = NF4BLK;
2967 data->arg.u.device.specdata1 = MAJOR(rdev);
2968 data->arg.u.device.specdata2 = MINOR(rdev);
2970 else if (S_ISCHR(mode)) {
2971 data->arg.ftype = NF4CHR;
2972 data->arg.u.device.specdata1 = MAJOR(rdev);
2973 data->arg.u.device.specdata2 = MINOR(rdev);
2976 status = nfs4_do_create(dir, dentry, data);
2978 nfs4_free_createdata(data);
2983 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2984 struct iattr *sattr, dev_t rdev)
2986 struct nfs4_exception exception = { };
2989 err = nfs4_handle_exception(NFS_SERVER(dir),
2990 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2992 } while (exception.retry);
2996 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2997 struct nfs_fsstat *fsstat)
2999 struct nfs4_statfs_arg args = {
3001 .bitmask = server->attr_bitmask,
3003 struct nfs4_statfs_res res = {
3006 struct rpc_message msg = {
3007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3012 nfs_fattr_init(fsstat->fattr);
3013 return nfs4_call_sync(server, &msg, &args, &res, 0);
3016 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3018 struct nfs4_exception exception = { };
3021 err = nfs4_handle_exception(server,
3022 _nfs4_proc_statfs(server, fhandle, fsstat),
3024 } while (exception.retry);
3028 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3029 struct nfs_fsinfo *fsinfo)
3031 struct nfs4_fsinfo_arg args = {
3033 .bitmask = server->attr_bitmask,
3035 struct nfs4_fsinfo_res res = {
3038 struct rpc_message msg = {
3039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3044 return nfs4_call_sync(server, &msg, &args, &res, 0);
3047 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3049 struct nfs4_exception exception = { };
3053 err = nfs4_handle_exception(server,
3054 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3056 } while (exception.retry);
3060 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3062 nfs_fattr_init(fsinfo->fattr);
3063 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3066 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3067 struct nfs_pathconf *pathconf)
3069 struct nfs4_pathconf_arg args = {
3071 .bitmask = server->attr_bitmask,
3073 struct nfs4_pathconf_res res = {
3074 .pathconf = pathconf,
3076 struct rpc_message msg = {
3077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3082 /* None of the pathconf attributes are mandatory to implement */
3083 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3084 memset(pathconf, 0, sizeof(*pathconf));
3088 nfs_fattr_init(pathconf->fattr);
3089 return nfs4_call_sync(server, &msg, &args, &res, 0);
3092 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3093 struct nfs_pathconf *pathconf)
3095 struct nfs4_exception exception = { };
3099 err = nfs4_handle_exception(server,
3100 _nfs4_proc_pathconf(server, fhandle, pathconf),
3102 } while (exception.retry);
3106 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3108 struct nfs_server *server = NFS_SERVER(data->inode);
3110 dprintk("--> %s\n", __func__);
3112 if (!nfs4_sequence_done(task, &data->res.seq_res))
3115 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3116 nfs_restart_rpc(task, server->nfs_client);
3120 nfs_invalidate_atime(data->inode);
3121 if (task->tk_status > 0)
3122 renew_lease(server, data->timestamp);
3126 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3128 data->timestamp = jiffies;
3129 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3132 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3134 struct inode *inode = data->inode;
3136 if (!nfs4_sequence_done(task, &data->res.seq_res))
3139 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3140 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3143 if (task->tk_status >= 0) {
3144 renew_lease(NFS_SERVER(inode), data->timestamp);
3145 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3150 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3152 struct nfs_server *server = NFS_SERVER(data->inode);
3154 data->args.bitmask = server->cache_consistency_bitmask;
3155 data->res.server = server;
3156 data->timestamp = jiffies;
3158 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3161 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3163 struct inode *inode = data->inode;
3165 if (!nfs4_sequence_done(task, &data->res.seq_res))
3168 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3169 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3172 nfs_refresh_inode(inode, data->res.fattr);
3176 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3178 struct nfs_server *server = NFS_SERVER(data->inode);
3180 data->args.bitmask = server->cache_consistency_bitmask;
3181 data->res.server = server;
3182 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3185 struct nfs4_renewdata {
3186 struct nfs_client *client;
3187 unsigned long timestamp;
3191 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3192 * standalone procedure for queueing an asynchronous RENEW.
3194 static void nfs4_renew_release(void *calldata)
3196 struct nfs4_renewdata *data = calldata;
3197 struct nfs_client *clp = data->client;
3199 if (atomic_read(&clp->cl_count) > 1)
3200 nfs4_schedule_state_renewal(clp);
3201 nfs_put_client(clp);
3205 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3207 struct nfs4_renewdata *data = calldata;
3208 struct nfs_client *clp = data->client;
3209 unsigned long timestamp = data->timestamp;
3211 if (task->tk_status < 0) {
3212 /* Unless we're shutting down, schedule state recovery! */
3213 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3214 nfs4_schedule_state_recovery(clp);
3217 do_renew_lease(clp, timestamp);
3220 static const struct rpc_call_ops nfs4_renew_ops = {
3221 .rpc_call_done = nfs4_renew_done,
3222 .rpc_release = nfs4_renew_release,
3225 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3227 struct rpc_message msg = {
3228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3232 struct nfs4_renewdata *data;
3234 if (!atomic_inc_not_zero(&clp->cl_count))
3236 data = kmalloc(sizeof(*data), GFP_KERNEL);
3240 data->timestamp = jiffies;
3241 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3242 &nfs4_renew_ops, data);
3245 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3247 struct rpc_message msg = {
3248 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3252 unsigned long now = jiffies;
3255 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3258 do_renew_lease(clp, now);
3262 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3264 return (server->caps & NFS_CAP_ACLS)
3265 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3266 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3269 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3270 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3273 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3275 static void buf_to_pages(const void *buf, size_t buflen,
3276 struct page **pages, unsigned int *pgbase)
3278 const void *p = buf;
3280 *pgbase = offset_in_page(buf);
3282 while (p < buf + buflen) {
3283 *(pages++) = virt_to_page(p);
3284 p += PAGE_CACHE_SIZE;
3288 struct nfs4_cached_acl {
3294 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3296 struct nfs_inode *nfsi = NFS_I(inode);
3298 spin_lock(&inode->i_lock);
3299 kfree(nfsi->nfs4_acl);
3300 nfsi->nfs4_acl = acl;
3301 spin_unlock(&inode->i_lock);
3304 static void nfs4_zap_acl_attr(struct inode *inode)
3306 nfs4_set_cached_acl(inode, NULL);
3309 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3311 struct nfs_inode *nfsi = NFS_I(inode);
3312 struct nfs4_cached_acl *acl;
3315 spin_lock(&inode->i_lock);
3316 acl = nfsi->nfs4_acl;
3319 if (buf == NULL) /* user is just asking for length */
3321 if (acl->cached == 0)
3323 ret = -ERANGE; /* see getxattr(2) man page */
3324 if (acl->len > buflen)
3326 memcpy(buf, acl->data, acl->len);
3330 spin_unlock(&inode->i_lock);
3334 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3336 struct nfs4_cached_acl *acl;
3338 if (buf && acl_len <= PAGE_SIZE) {
3339 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3343 memcpy(acl->data, buf, acl_len);
3345 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3352 nfs4_set_cached_acl(inode, acl);
3355 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3357 struct page *pages[NFS4ACL_MAXPAGES];
3358 struct nfs_getaclargs args = {
3359 .fh = NFS_FH(inode),
3363 struct nfs_getaclres res = {
3367 struct rpc_message msg = {
3368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3372 struct page *localpage = NULL;
3375 if (buflen < PAGE_SIZE) {
3376 /* As long as we're doing a round trip to the server anyway,
3377 * let's be prepared for a page of acl data. */
3378 localpage = alloc_page(GFP_KERNEL);
3379 resp_buf = page_address(localpage);
3380 if (localpage == NULL)
3382 args.acl_pages[0] = localpage;
3383 args.acl_pgbase = 0;
3384 args.acl_len = PAGE_SIZE;
3387 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3389 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3392 if (res.acl_len > args.acl_len)
3393 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3395 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3398 if (res.acl_len > buflen)
3401 memcpy(buf, resp_buf, res.acl_len);
3406 __free_page(localpage);
3410 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3412 struct nfs4_exception exception = { };
3415 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3418 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3419 } while (exception.retry);
3423 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3425 struct nfs_server *server = NFS_SERVER(inode);
3428 if (!nfs4_server_supports_acls(server))
3430 ret = nfs_revalidate_inode(server, inode);
3433 ret = nfs4_read_cached_acl(inode, buf, buflen);
3436 return nfs4_get_acl_uncached(inode, buf, buflen);
3439 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3441 struct nfs_server *server = NFS_SERVER(inode);
3442 struct page *pages[NFS4ACL_MAXPAGES];
3443 struct nfs_setaclargs arg = {
3444 .fh = NFS_FH(inode),
3448 struct nfs_setaclres res;
3449 struct rpc_message msg = {
3450 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3456 if (!nfs4_server_supports_acls(server))
3458 nfs_inode_return_delegation(inode);
3459 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3460 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3461 nfs_access_zap_cache(inode);
3462 nfs_zap_acl_cache(inode);
3466 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3468 struct nfs4_exception exception = { };
3471 err = nfs4_handle_exception(NFS_SERVER(inode),
3472 __nfs4_proc_set_acl(inode, buf, buflen),
3474 } while (exception.retry);
3479 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3481 struct nfs_client *clp = server->nfs_client;
3483 if (task->tk_status >= 0)
3485 switch(task->tk_status) {
3486 case -NFS4ERR_ADMIN_REVOKED:
3487 case -NFS4ERR_BAD_STATEID:
3488 case -NFS4ERR_OPENMODE:
3491 nfs4_state_mark_reclaim_nograce(clp, state);
3492 goto do_state_recovery;
3493 case -NFS4ERR_STALE_STATEID:
3496 nfs4_state_mark_reclaim_reboot(clp, state);
3497 case -NFS4ERR_STALE_CLIENTID:
3498 case -NFS4ERR_EXPIRED:
3499 goto do_state_recovery;
3500 #if defined(CONFIG_NFS_V4_1)
3501 case -NFS4ERR_BADSESSION:
3502 case -NFS4ERR_BADSLOT:
3503 case -NFS4ERR_BAD_HIGH_SLOT:
3504 case -NFS4ERR_DEADSESSION:
3505 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3506 case -NFS4ERR_SEQ_FALSE_RETRY:
3507 case -NFS4ERR_SEQ_MISORDERED:
3508 dprintk("%s ERROR %d, Reset session\n", __func__,
3510 nfs4_schedule_state_recovery(clp);
3511 task->tk_status = 0;
3513 #endif /* CONFIG_NFS_V4_1 */
3514 case -NFS4ERR_DELAY:
3515 nfs_inc_server_stats(server, NFSIOS_DELAY);
3516 case -NFS4ERR_GRACE:
3518 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3519 task->tk_status = 0;
3521 case -NFS4ERR_OLD_STATEID:
3522 task->tk_status = 0;
3525 task->tk_status = nfs4_map_errors(task->tk_status);
3528 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3529 nfs4_schedule_state_recovery(clp);
3530 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3531 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3532 task->tk_status = 0;
3536 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3537 unsigned short port, struct rpc_cred *cred,
3538 struct nfs4_setclientid_res *res)
3540 nfs4_verifier sc_verifier;
3541 struct nfs4_setclientid setclientid = {
3542 .sc_verifier = &sc_verifier,
3545 struct rpc_message msg = {
3546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3547 .rpc_argp = &setclientid,
3555 p = (__be32*)sc_verifier.data;
3556 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3557 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3560 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3561 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3563 rpc_peeraddr2str(clp->cl_rpcclient,
3565 rpc_peeraddr2str(clp->cl_rpcclient,
3567 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3568 clp->cl_id_uniquifier);
3569 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3570 sizeof(setclientid.sc_netid),
3571 rpc_peeraddr2str(clp->cl_rpcclient,
3572 RPC_DISPLAY_NETID));
3573 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3574 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3575 clp->cl_ipaddr, port >> 8, port & 255);
3577 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3578 if (status != -NFS4ERR_CLID_INUSE)
3583 ssleep(clp->cl_lease_time + 1);
3585 if (++clp->cl_id_uniquifier == 0)
3591 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3592 struct nfs4_setclientid_res *arg,
3593 struct rpc_cred *cred)
3595 struct nfs_fsinfo fsinfo;
3596 struct rpc_message msg = {
3597 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3599 .rpc_resp = &fsinfo,
3606 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3608 spin_lock(&clp->cl_lock);
3609 clp->cl_lease_time = fsinfo.lease_time * HZ;
3610 clp->cl_last_renewal = now;
3611 spin_unlock(&clp->cl_lock);
3616 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3617 struct nfs4_setclientid_res *arg,
3618 struct rpc_cred *cred)
3623 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
3627 case -NFS4ERR_RESOURCE:
3628 /* The IBM lawyers misread another document! */
3629 case -NFS4ERR_DELAY:
3631 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3637 struct nfs4_delegreturndata {
3638 struct nfs4_delegreturnargs args;
3639 struct nfs4_delegreturnres res;
3641 nfs4_stateid stateid;
3642 unsigned long timestamp;
3643 struct nfs_fattr fattr;
3647 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3649 struct nfs4_delegreturndata *data = calldata;
3651 if (!nfs4_sequence_done(task, &data->res.seq_res))
3654 switch (task->tk_status) {
3655 case -NFS4ERR_STALE_STATEID:
3656 case -NFS4ERR_EXPIRED:
3658 renew_lease(data->res.server, data->timestamp);
3661 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3663 nfs_restart_rpc(task, data->res.server->nfs_client);
3667 data->rpc_status = task->tk_status;
3670 static void nfs4_delegreturn_release(void *calldata)
3675 #if defined(CONFIG_NFS_V4_1)
3676 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3678 struct nfs4_delegreturndata *d_data;
3680 d_data = (struct nfs4_delegreturndata *)data;
3682 if (nfs4_setup_sequence(d_data->res.server,
3683 &d_data->args.seq_args,
3684 &d_data->res.seq_res, 1, task))
3686 rpc_call_start(task);
3688 #endif /* CONFIG_NFS_V4_1 */
3690 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3691 #if defined(CONFIG_NFS_V4_1)
3692 .rpc_call_prepare = nfs4_delegreturn_prepare,
3693 #endif /* CONFIG_NFS_V4_1 */
3694 .rpc_call_done = nfs4_delegreturn_done,
3695 .rpc_release = nfs4_delegreturn_release,
3698 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3700 struct nfs4_delegreturndata *data;
3701 struct nfs_server *server = NFS_SERVER(inode);
3702 struct rpc_task *task;
3703 struct rpc_message msg = {
3704 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3707 struct rpc_task_setup task_setup_data = {
3708 .rpc_client = server->client,
3709 .rpc_message = &msg,
3710 .callback_ops = &nfs4_delegreturn_ops,
3711 .flags = RPC_TASK_ASYNC,
3715 data = kzalloc(sizeof(*data), GFP_NOFS);
3718 data->args.fhandle = &data->fh;
3719 data->args.stateid = &data->stateid;
3720 data->args.bitmask = server->attr_bitmask;
3721 nfs_copy_fh(&data->fh, NFS_FH(inode));
3722 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3723 data->res.fattr = &data->fattr;
3724 data->res.server = server;
3725 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3726 nfs_fattr_init(data->res.fattr);
3727 data->timestamp = jiffies;
3728 data->rpc_status = 0;
3730 task_setup_data.callback_data = data;
3731 msg.rpc_argp = &data->args,
3732 msg.rpc_resp = &data->res,
3733 task = rpc_run_task(&task_setup_data);
3735 return PTR_ERR(task);
3738 status = nfs4_wait_for_completion_rpc_task(task);
3741 status = data->rpc_status;
3744 nfs_refresh_inode(inode, &data->fattr);
3750 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3752 struct nfs_server *server = NFS_SERVER(inode);
3753 struct nfs4_exception exception = { };
3756 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3758 case -NFS4ERR_STALE_STATEID:
3759 case -NFS4ERR_EXPIRED:
3763 err = nfs4_handle_exception(server, err, &exception);
3764 } while (exception.retry);
3768 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3769 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3772 * sleep, with exponential backoff, and retry the LOCK operation.
3774 static unsigned long
3775 nfs4_set_lock_task_retry(unsigned long timeout)
3777 schedule_timeout_killable(timeout);
3779 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3780 return NFS4_LOCK_MAXTIMEOUT;
3784 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3786 struct inode *inode = state->inode;
3787 struct nfs_server *server = NFS_SERVER(inode);
3788 struct nfs_client *clp = server->nfs_client;
3789 struct nfs_lockt_args arg = {
3790 .fh = NFS_FH(inode),
3793 struct nfs_lockt_res res = {
3796 struct rpc_message msg = {
3797 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3800 .rpc_cred = state->owner->so_cred,
3802 struct nfs4_lock_state *lsp;
3805 arg.lock_owner.clientid = clp->cl_clientid;
3806 status = nfs4_set_lock_state(state, request);
3809 lsp = request->fl_u.nfs4_fl.owner;
3810 arg.lock_owner.id = lsp->ls_id.id;
3811 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3814 request->fl_type = F_UNLCK;
3816 case -NFS4ERR_DENIED:
3819 request->fl_ops->fl_release_private(request);
3824 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3826 struct nfs4_exception exception = { };
3830 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3831 _nfs4_proc_getlk(state, cmd, request),
3833 } while (exception.retry);
3837 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3840 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3842 res = posix_lock_file_wait(file, fl);
3845 res = flock_lock_file_wait(file, fl);
3853 struct nfs4_unlockdata {
3854 struct nfs_locku_args arg;
3855 struct nfs_locku_res res;
3856 struct nfs4_lock_state *lsp;
3857 struct nfs_open_context *ctx;
3858 struct file_lock fl;
3859 const struct nfs_server *server;
3860 unsigned long timestamp;
3863 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3864 struct nfs_open_context *ctx,
3865 struct nfs4_lock_state *lsp,
3866 struct nfs_seqid *seqid)
3868 struct nfs4_unlockdata *p;
3869 struct inode *inode = lsp->ls_state->inode;
3871 p = kzalloc(sizeof(*p), GFP_NOFS);
3874 p->arg.fh = NFS_FH(inode);
3876 p->arg.seqid = seqid;
3877 p->res.seqid = seqid;
3878 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3879 p->arg.stateid = &lsp->ls_stateid;
3881 atomic_inc(&lsp->ls_count);
3882 /* Ensure we don't close file until we're done freeing locks! */
3883 p->ctx = get_nfs_open_context(ctx);
3884 memcpy(&p->fl, fl, sizeof(p->fl));
3885 p->server = NFS_SERVER(inode);
3889 static void nfs4_locku_release_calldata(void *data)
3891 struct nfs4_unlockdata *calldata = data;
3892 nfs_free_seqid(calldata->arg.seqid);
3893 nfs4_put_lock_state(calldata->lsp);
3894 put_nfs_open_context(calldata->ctx);
3898 static void nfs4_locku_done(struct rpc_task *task, void *data)
3900 struct nfs4_unlockdata *calldata = data;
3902 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3904 switch (task->tk_status) {
3906 memcpy(calldata->lsp->ls_stateid.data,
3907 calldata->res.stateid.data,
3908 sizeof(calldata->lsp->ls_stateid.data));
3909 renew_lease(calldata->server, calldata->timestamp);
3911 case -NFS4ERR_BAD_STATEID:
3912 case -NFS4ERR_OLD_STATEID:
3913 case -NFS4ERR_STALE_STATEID:
3914 case -NFS4ERR_EXPIRED:
3917 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3918 nfs_restart_rpc(task,
3919 calldata->server->nfs_client);
3923 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3925 struct nfs4_unlockdata *calldata = data;
3927 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3929 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3930 /* Note: exit _without_ running nfs4_locku_done */
3931 task->tk_action = NULL;
3934 calldata->timestamp = jiffies;
3935 if (nfs4_setup_sequence(calldata->server,
3936 &calldata->arg.seq_args,
3937 &calldata->res.seq_res, 1, task))
3939 rpc_call_start(task);
3942 static const struct rpc_call_ops nfs4_locku_ops = {
3943 .rpc_call_prepare = nfs4_locku_prepare,
3944 .rpc_call_done = nfs4_locku_done,
3945 .rpc_release = nfs4_locku_release_calldata,
3948 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3949 struct nfs_open_context *ctx,
3950 struct nfs4_lock_state *lsp,
3951 struct nfs_seqid *seqid)
3953 struct nfs4_unlockdata *data;
3954 struct rpc_message msg = {
3955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3956 .rpc_cred = ctx->cred,
3958 struct rpc_task_setup task_setup_data = {
3959 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3960 .rpc_message = &msg,
3961 .callback_ops = &nfs4_locku_ops,
3962 .workqueue = nfsiod_workqueue,
3963 .flags = RPC_TASK_ASYNC,
3966 /* Ensure this is an unlock - when canceling a lock, the
3967 * canceled lock is passed in, and it won't be an unlock.
3969 fl->fl_type = F_UNLCK;
3971 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3973 nfs_free_seqid(seqid);
3974 return ERR_PTR(-ENOMEM);
3977 msg.rpc_argp = &data->arg,
3978 msg.rpc_resp = &data->res,
3979 task_setup_data.callback_data = data;
3980 return rpc_run_task(&task_setup_data);
3983 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3985 struct nfs_inode *nfsi = NFS_I(state->inode);
3986 struct nfs_seqid *seqid;
3987 struct nfs4_lock_state *lsp;
3988 struct rpc_task *task;
3990 unsigned char fl_flags = request->fl_flags;
3992 status = nfs4_set_lock_state(state, request);
3993 /* Unlock _before_ we do the RPC call */
3994 request->fl_flags |= FL_EXISTS;
3995 down_read(&nfsi->rwsem);
3996 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3997 up_read(&nfsi->rwsem);
4000 up_read(&nfsi->rwsem);
4003 /* Is this a delegated lock? */
4004 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4006 lsp = request->fl_u.nfs4_fl.owner;
4007 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4011 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4012 status = PTR_ERR(task);
4015 status = nfs4_wait_for_completion_rpc_task(task);
4018 request->fl_flags = fl_flags;
4022 struct nfs4_lockdata {
4023 struct nfs_lock_args arg;
4024 struct nfs_lock_res res;
4025 struct nfs4_lock_state *lsp;
4026 struct nfs_open_context *ctx;
4027 struct file_lock fl;
4028 unsigned long timestamp;
4031 struct nfs_server *server;
4034 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4035 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4038 struct nfs4_lockdata *p;
4039 struct inode *inode = lsp->ls_state->inode;
4040 struct nfs_server *server = NFS_SERVER(inode);
4042 p = kzalloc(sizeof(*p), gfp_mask);
4046 p->arg.fh = NFS_FH(inode);
4048 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4049 if (p->arg.open_seqid == NULL)
4051 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4052 if (p->arg.lock_seqid == NULL)
4053 goto out_free_seqid;
4054 p->arg.lock_stateid = &lsp->ls_stateid;
4055 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4056 p->arg.lock_owner.id = lsp->ls_id.id;
4057 p->res.lock_seqid = p->arg.lock_seqid;
4058 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4061 atomic_inc(&lsp->ls_count);
4062 p->ctx = get_nfs_open_context(ctx);
4063 memcpy(&p->fl, fl, sizeof(p->fl));
4066 nfs_free_seqid(p->arg.open_seqid);
4072 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4074 struct nfs4_lockdata *data = calldata;
4075 struct nfs4_state *state = data->lsp->ls_state;
4077 dprintk("%s: begin!\n", __func__);
4078 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4080 /* Do we need to do an open_to_lock_owner? */
4081 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4082 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4084 data->arg.open_stateid = &state->stateid;
4085 data->arg.new_lock_owner = 1;
4086 data->res.open_seqid = data->arg.open_seqid;
4088 data->arg.new_lock_owner = 0;
4089 data->timestamp = jiffies;
4090 if (nfs4_setup_sequence(data->server,
4091 &data->arg.seq_args,
4092 &data->res.seq_res, 1, task))
4094 rpc_call_start(task);
4095 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4098 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4100 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4101 nfs4_lock_prepare(task, calldata);
4104 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4106 struct nfs4_lockdata *data = calldata;
4108 dprintk("%s: begin!\n", __func__);
4110 if (!nfs4_sequence_done(task, &data->res.seq_res))
4113 data->rpc_status = task->tk_status;
4114 if (data->arg.new_lock_owner != 0) {
4115 if (data->rpc_status == 0)
4116 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4120 if (data->rpc_status == 0) {
4121 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4122 sizeof(data->lsp->ls_stateid.data));
4123 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4124 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
4127 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4130 static void nfs4_lock_release(void *calldata)
4132 struct nfs4_lockdata *data = calldata;
4134 dprintk("%s: begin!\n", __func__);
4135 nfs_free_seqid(data->arg.open_seqid);
4136 if (data->cancelled != 0) {
4137 struct rpc_task *task;
4138 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4139 data->arg.lock_seqid);
4142 dprintk("%s: cancelling lock!\n", __func__);
4144 nfs_free_seqid(data->arg.lock_seqid);
4145 nfs4_put_lock_state(data->lsp);
4146 put_nfs_open_context(data->ctx);
4148 dprintk("%s: done!\n", __func__);
4151 static const struct rpc_call_ops nfs4_lock_ops = {
4152 .rpc_call_prepare = nfs4_lock_prepare,
4153 .rpc_call_done = nfs4_lock_done,
4154 .rpc_release = nfs4_lock_release,
4157 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4158 .rpc_call_prepare = nfs4_recover_lock_prepare,
4159 .rpc_call_done = nfs4_lock_done,
4160 .rpc_release = nfs4_lock_release,
4163 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4165 struct nfs_client *clp = server->nfs_client;
4166 struct nfs4_state *state = lsp->ls_state;
4169 case -NFS4ERR_ADMIN_REVOKED:
4170 case -NFS4ERR_BAD_STATEID:
4171 case -NFS4ERR_EXPIRED:
4172 if (new_lock_owner != 0 ||
4173 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4174 nfs4_state_mark_reclaim_nograce(clp, state);
4175 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4177 case -NFS4ERR_STALE_STATEID:
4178 if (new_lock_owner != 0 ||
4179 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4180 nfs4_state_mark_reclaim_reboot(clp, state);
4181 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4185 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4187 struct nfs4_lockdata *data;
4188 struct rpc_task *task;
4189 struct rpc_message msg = {
4190 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4191 .rpc_cred = state->owner->so_cred,
4193 struct rpc_task_setup task_setup_data = {
4194 .rpc_client = NFS_CLIENT(state->inode),
4195 .rpc_message = &msg,
4196 .callback_ops = &nfs4_lock_ops,
4197 .workqueue = nfsiod_workqueue,
4198 .flags = RPC_TASK_ASYNC,
4202 dprintk("%s: begin!\n", __func__);
4203 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4204 fl->fl_u.nfs4_fl.owner,
4205 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4209 data->arg.block = 1;
4210 if (recovery_type > NFS_LOCK_NEW) {
4211 if (recovery_type == NFS_LOCK_RECLAIM)
4212 data->arg.reclaim = NFS_LOCK_RECLAIM;
4213 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4215 msg.rpc_argp = &data->arg,
4216 msg.rpc_resp = &data->res,
4217 task_setup_data.callback_data = data;
4218 task = rpc_run_task(&task_setup_data);
4220 return PTR_ERR(task);
4221 ret = nfs4_wait_for_completion_rpc_task(task);
4223 ret = data->rpc_status;
4225 nfs4_handle_setlk_error(data->server, data->lsp,
4226 data->arg.new_lock_owner, ret);
4228 data->cancelled = 1;
4230 dprintk("%s: done, ret = %d!\n", __func__, ret);
4234 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4236 struct nfs_server *server = NFS_SERVER(state->inode);
4237 struct nfs4_exception exception = { };
4241 /* Cache the lock if possible... */
4242 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4244 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4245 if (err != -NFS4ERR_DELAY && err != -EKEYEXPIRED)
4247 nfs4_handle_exception(server, err, &exception);
4248 } while (exception.retry);
4252 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4254 struct nfs_server *server = NFS_SERVER(state->inode);
4255 struct nfs4_exception exception = { };
4258 err = nfs4_set_lock_state(state, request);
4262 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4264 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4268 case -NFS4ERR_GRACE:
4269 case -NFS4ERR_DELAY:
4271 nfs4_handle_exception(server, err, &exception);
4274 } while (exception.retry);
4279 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4281 struct nfs_inode *nfsi = NFS_I(state->inode);
4282 unsigned char fl_flags = request->fl_flags;
4283 int status = -ENOLCK;
4285 if ((fl_flags & FL_POSIX) &&
4286 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4288 /* Is this a delegated open? */
4289 status = nfs4_set_lock_state(state, request);
4292 request->fl_flags |= FL_ACCESS;
4293 status = do_vfs_lock(request->fl_file, request);
4296 down_read(&nfsi->rwsem);
4297 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4298 /* Yes: cache locks! */
4299 /* ...but avoid races with delegation recall... */
4300 request->fl_flags = fl_flags & ~FL_SLEEP;
4301 status = do_vfs_lock(request->fl_file, request);
4304 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4307 /* Note: we always want to sleep here! */
4308 request->fl_flags = fl_flags | FL_SLEEP;
4309 if (do_vfs_lock(request->fl_file, request) < 0)
4310 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4312 up_read(&nfsi->rwsem);
4314 request->fl_flags = fl_flags;
4318 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4320 struct nfs4_exception exception = { };
4324 err = _nfs4_proc_setlk(state, cmd, request);
4325 if (err == -NFS4ERR_DENIED)
4327 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4329 } while (exception.retry);
4334 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4336 struct nfs_open_context *ctx;
4337 struct nfs4_state *state;
4338 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4341 /* verify open state */
4342 ctx = nfs_file_open_context(filp);
4345 if (request->fl_start < 0 || request->fl_end < 0)
4348 if (IS_GETLK(cmd)) {
4350 return nfs4_proc_getlk(state, F_GETLK, request);
4354 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4357 if (request->fl_type == F_UNLCK) {
4359 return nfs4_proc_unlck(state, cmd, request);
4366 status = nfs4_proc_setlk(state, cmd, request);
4367 if ((status != -EAGAIN) || IS_SETLK(cmd))
4369 timeout = nfs4_set_lock_task_retry(timeout);
4370 status = -ERESTARTSYS;
4373 } while(status < 0);
4377 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4379 struct nfs_server *server = NFS_SERVER(state->inode);
4380 struct nfs4_exception exception = { };
4383 err = nfs4_set_lock_state(state, fl);
4387 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4390 printk(KERN_ERR "%s: unhandled error %d.\n",
4395 case -NFS4ERR_EXPIRED:
4396 case -NFS4ERR_STALE_CLIENTID:
4397 case -NFS4ERR_STALE_STATEID:
4398 case -NFS4ERR_BADSESSION:
4399 case -NFS4ERR_BADSLOT:
4400 case -NFS4ERR_BAD_HIGH_SLOT:
4401 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4402 case -NFS4ERR_DEADSESSION:
4403 nfs4_schedule_state_recovery(server->nfs_client);
4407 * The show must go on: exit, but mark the
4408 * stateid as needing recovery.
4410 case -NFS4ERR_ADMIN_REVOKED:
4411 case -NFS4ERR_BAD_STATEID:
4412 case -NFS4ERR_OPENMODE:
4413 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4417 case -NFS4ERR_DENIED:
4418 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4421 case -NFS4ERR_DELAY:
4425 err = nfs4_handle_exception(server, err, &exception);
4426 } while (exception.retry);
4431 static void nfs4_release_lockowner_release(void *calldata)
4436 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4437 .rpc_release = nfs4_release_lockowner_release,
4440 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4442 struct nfs_server *server = lsp->ls_state->owner->so_server;
4443 struct nfs_release_lockowner_args *args;
4444 struct rpc_message msg = {
4445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4448 if (server->nfs_client->cl_mvops->minor_version != 0)
4450 args = kmalloc(sizeof(*args), GFP_NOFS);
4453 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4454 args->lock_owner.id = lsp->ls_id.id;
4455 msg.rpc_argp = args;
4456 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4459 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4461 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4462 size_t buflen, int flags)
4464 struct inode *inode = dentry->d_inode;
4466 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4469 return nfs4_proc_set_acl(inode, buf, buflen);
4472 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4473 * and that's what we'll do for e.g. user attributes that haven't been set.
4474 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4475 * attributes in kernel-managed attribute namespaces. */
4476 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4479 struct inode *inode = dentry->d_inode;
4481 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4484 return nfs4_proc_get_acl(inode, buf, buflen);
4487 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4489 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4491 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4493 if (buf && buflen < len)
4496 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4500 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4502 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4503 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4504 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4507 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4508 NFS_ATTR_FATTR_NLINK;
4509 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4513 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4514 struct nfs4_fs_locations *fs_locations, struct page *page)
4516 struct nfs_server *server = NFS_SERVER(dir);
4518 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4519 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4521 struct nfs4_fs_locations_arg args = {
4522 .dir_fh = NFS_FH(dir),
4527 struct nfs4_fs_locations_res res = {
4528 .fs_locations = fs_locations,
4530 struct rpc_message msg = {
4531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4537 dprintk("%s: start\n", __func__);
4538 nfs_fattr_init(&fs_locations->fattr);
4539 fs_locations->server = server;
4540 fs_locations->nlocations = 0;
4541 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4542 nfs_fixup_referral_attributes(&fs_locations->fattr);
4543 dprintk("%s: returned status = %d\n", __func__, status);
4547 #ifdef CONFIG_NFS_V4_1
4549 * nfs4_proc_exchange_id()
4551 * Since the clientid has expired, all compounds using sessions
4552 * associated with the stale clientid will be returning
4553 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4554 * be in some phase of session reset.
4556 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4558 nfs4_verifier verifier;
4559 struct nfs41_exchange_id_args args = {
4561 .flags = clp->cl_exchange_flags,
4563 struct nfs41_exchange_id_res res = {
4567 struct rpc_message msg = {
4568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4575 dprintk("--> %s\n", __func__);
4576 BUG_ON(clp == NULL);
4578 /* Remove server-only flags */
4579 args.flags &= ~EXCHGID4_FLAG_CONFIRMED_R;
4581 p = (u32 *)verifier.data;
4582 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4583 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4584 args.verifier = &verifier;
4587 args.id_len = scnprintf(args.id, sizeof(args.id),
4590 rpc_peeraddr2str(clp->cl_rpcclient,
4592 clp->cl_id_uniquifier);
4594 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4596 if (status != -NFS4ERR_CLID_INUSE)
4602 if (++clp->cl_id_uniquifier == 0)
4606 dprintk("<-- %s status= %d\n", __func__, status);
4610 struct nfs4_get_lease_time_data {
4611 struct nfs4_get_lease_time_args *args;
4612 struct nfs4_get_lease_time_res *res;
4613 struct nfs_client *clp;
4616 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4620 struct nfs4_get_lease_time_data *data =
4621 (struct nfs4_get_lease_time_data *)calldata;
4623 dprintk("--> %s\n", __func__);
4624 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4625 /* just setup sequence, do not trigger session recovery
4626 since we're invoked within one */
4627 ret = nfs41_setup_sequence(data->clp->cl_session,
4628 &data->args->la_seq_args,
4629 &data->res->lr_seq_res, 0, task);
4631 BUG_ON(ret == -EAGAIN);
4632 rpc_call_start(task);
4633 dprintk("<-- %s\n", __func__);
4637 * Called from nfs4_state_manager thread for session setup, so don't recover
4638 * from sequence operation or clientid errors.
4640 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4642 struct nfs4_get_lease_time_data *data =
4643 (struct nfs4_get_lease_time_data *)calldata;
4645 dprintk("--> %s\n", __func__);
4646 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4648 switch (task->tk_status) {
4649 case -NFS4ERR_DELAY:
4650 case -NFS4ERR_GRACE:
4652 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4653 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4654 task->tk_status = 0;
4655 nfs_restart_rpc(task, data->clp);
4658 dprintk("<-- %s\n", __func__);
4661 struct rpc_call_ops nfs4_get_lease_time_ops = {
4662 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4663 .rpc_call_done = nfs4_get_lease_time_done,
4666 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4668 struct rpc_task *task;
4669 struct nfs4_get_lease_time_args args;
4670 struct nfs4_get_lease_time_res res = {
4671 .lr_fsinfo = fsinfo,
4673 struct nfs4_get_lease_time_data data = {
4678 struct rpc_message msg = {
4679 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4683 struct rpc_task_setup task_setup = {
4684 .rpc_client = clp->cl_rpcclient,
4685 .rpc_message = &msg,
4686 .callback_ops = &nfs4_get_lease_time_ops,
4687 .callback_data = &data
4691 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4692 dprintk("--> %s\n", __func__);
4693 task = rpc_run_task(&task_setup);
4696 status = PTR_ERR(task);
4698 status = task->tk_status;
4701 dprintk("<-- %s return %d\n", __func__, status);
4707 * Reset a slot table
4709 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4712 struct nfs4_slot *new = NULL;
4716 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4717 max_reqs, tbl->max_slots);
4719 /* Does the newly negotiated max_reqs match the existing slot table? */
4720 if (max_reqs != tbl->max_slots) {
4722 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
4729 spin_lock(&tbl->slot_tbl_lock);
4732 tbl->max_slots = max_reqs;
4734 for (i = 0; i < tbl->max_slots; ++i)
4735 tbl->slots[i].seq_nr = ivalue;
4736 spin_unlock(&tbl->slot_tbl_lock);
4737 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4738 tbl, tbl->slots, tbl->max_slots);
4740 dprintk("<-- %s: return %d\n", __func__, ret);
4745 * Reset the forechannel and backchannel slot tables
4747 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4751 status = nfs4_reset_slot_table(&session->fc_slot_table,
4752 session->fc_attrs.max_reqs, 1);
4756 status = nfs4_reset_slot_table(&session->bc_slot_table,
4757 session->bc_attrs.max_reqs, 0);
4761 /* Destroy the slot table */
4762 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4764 if (session->fc_slot_table.slots != NULL) {
4765 kfree(session->fc_slot_table.slots);
4766 session->fc_slot_table.slots = NULL;
4768 if (session->bc_slot_table.slots != NULL) {
4769 kfree(session->bc_slot_table.slots);
4770 session->bc_slot_table.slots = NULL;
4776 * Initialize slot table
4778 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4779 int max_slots, int ivalue)
4781 struct nfs4_slot *slot;
4784 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4786 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4788 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
4793 spin_lock(&tbl->slot_tbl_lock);
4794 tbl->max_slots = max_slots;
4796 tbl->highest_used_slotid = -1; /* no slot is currently used */
4797 spin_unlock(&tbl->slot_tbl_lock);
4798 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4799 tbl, tbl->slots, tbl->max_slots);
4801 dprintk("<-- %s: return %d\n", __func__, ret);
4806 * Initialize the forechannel and backchannel tables
4808 static int nfs4_init_slot_tables(struct nfs4_session *session)
4810 struct nfs4_slot_table *tbl;
4813 tbl = &session->fc_slot_table;
4814 if (tbl->slots == NULL) {
4815 status = nfs4_init_slot_table(tbl,
4816 session->fc_attrs.max_reqs, 1);
4821 tbl = &session->bc_slot_table;
4822 if (tbl->slots == NULL) {
4823 status = nfs4_init_slot_table(tbl,
4824 session->bc_attrs.max_reqs, 0);
4826 nfs4_destroy_slot_tables(session);
4832 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4834 struct nfs4_session *session;
4835 struct nfs4_slot_table *tbl;
4837 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
4841 init_completion(&session->complete);
4843 tbl = &session->fc_slot_table;
4844 tbl->highest_used_slotid = -1;
4845 spin_lock_init(&tbl->slot_tbl_lock);
4846 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4848 tbl = &session->bc_slot_table;
4849 tbl->highest_used_slotid = -1;
4850 spin_lock_init(&tbl->slot_tbl_lock);
4851 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4853 session->session_state = 1<<NFS4_SESSION_INITING;
4859 void nfs4_destroy_session(struct nfs4_session *session)
4861 nfs4_proc_destroy_session(session);
4862 dprintk("%s Destroy backchannel for xprt %p\n",
4863 __func__, session->clp->cl_rpcclient->cl_xprt);
4864 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4865 NFS41_BC_MIN_CALLBACKS);
4866 nfs4_destroy_slot_tables(session);
4871 * Initialize the values to be used by the client in CREATE_SESSION
4872 * If nfs4_init_session set the fore channel request and response sizes,
4875 * Set the back channel max_resp_sz_cached to zero to force the client to
4876 * always set csa_cachethis to FALSE because the current implementation
4877 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4879 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4881 struct nfs4_session *session = args->client->cl_session;
4882 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4883 mxresp_sz = session->fc_attrs.max_resp_sz;
4886 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4888 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4889 /* Fore channel attributes */
4890 args->fc_attrs.headerpadsz = 0;
4891 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4892 args->fc_attrs.max_resp_sz = mxresp_sz;
4893 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4894 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4896 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4897 "max_ops=%u max_reqs=%u\n",
4899 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4900 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
4902 /* Back channel attributes */
4903 args->bc_attrs.headerpadsz = 0;
4904 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4905 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4906 args->bc_attrs.max_resp_sz_cached = 0;
4907 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4908 args->bc_attrs.max_reqs = 1;
4910 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4911 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4913 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4914 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4915 args->bc_attrs.max_reqs);
4918 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4922 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4923 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4927 #define _verify_fore_channel_attr(_name_) \
4928 _verify_channel_attr("fore", #_name_, \
4929 args->fc_attrs._name_, \
4930 session->fc_attrs._name_)
4932 #define _verify_back_channel_attr(_name_) \
4933 _verify_channel_attr("back", #_name_, \
4934 args->bc_attrs._name_, \
4935 session->bc_attrs._name_)
4938 * The server is not allowed to increase the fore channel header pad size,
4939 * maximum response size, or maximum number of operations.
4941 * The back channel attributes are only negotiatied down: We send what the
4942 * (back channel) server insists upon.
4944 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4945 struct nfs4_session *session)
4949 ret |= _verify_fore_channel_attr(headerpadsz);
4950 ret |= _verify_fore_channel_attr(max_resp_sz);
4951 ret |= _verify_fore_channel_attr(max_ops);
4953 ret |= _verify_back_channel_attr(headerpadsz);
4954 ret |= _verify_back_channel_attr(max_rqst_sz);
4955 ret |= _verify_back_channel_attr(max_resp_sz);
4956 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4957 ret |= _verify_back_channel_attr(max_ops);
4958 ret |= _verify_back_channel_attr(max_reqs);
4963 static int _nfs4_proc_create_session(struct nfs_client *clp)
4965 struct nfs4_session *session = clp->cl_session;
4966 struct nfs41_create_session_args args = {
4968 .cb_program = NFS4_CALLBACK,
4970 struct nfs41_create_session_res res = {
4973 struct rpc_message msg = {
4974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4980 nfs4_init_channel_attrs(&args);
4981 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
4983 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4986 /* Verify the session's negotiated channel_attrs values */
4987 status = nfs4_verify_channel_attrs(&args, session);
4989 /* Increment the clientid slot sequence id */
4997 * Issues a CREATE_SESSION operation to the server.
4998 * It is the responsibility of the caller to verify the session is
4999 * expired before calling this routine.
5001 int nfs4_proc_create_session(struct nfs_client *clp)
5005 struct nfs4_session *session = clp->cl_session;
5007 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5009 status = _nfs4_proc_create_session(clp);
5013 /* Init and reset the fore channel */
5014 status = nfs4_init_slot_tables(session);
5015 dprintk("slot table initialization returned %d\n", status);
5018 status = nfs4_reset_slot_tables(session);
5019 dprintk("slot table reset returned %d\n", status);
5023 ptr = (unsigned *)&session->sess_id.data[0];
5024 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5025 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5027 dprintk("<-- %s\n", __func__);
5032 * Issue the over-the-wire RPC DESTROY_SESSION.
5033 * The caller must serialize access to this routine.
5035 int nfs4_proc_destroy_session(struct nfs4_session *session)
5038 struct rpc_message msg;
5040 dprintk("--> nfs4_proc_destroy_session\n");
5042 /* session is still being setup */
5043 if (session->clp->cl_cons_state != NFS_CS_READY)
5046 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5047 msg.rpc_argp = session;
5048 msg.rpc_resp = NULL;
5049 msg.rpc_cred = NULL;
5050 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5054 "Got error %d from the server on DESTROY_SESSION. "
5055 "Session has been destroyed regardless...\n", status);
5057 dprintk("<-- nfs4_proc_destroy_session\n");
5061 int nfs4_init_session(struct nfs_server *server)
5063 struct nfs_client *clp = server->nfs_client;
5064 struct nfs4_session *session;
5065 unsigned int rsize, wsize;
5068 if (!nfs4_has_session(clp))
5071 session = clp->cl_session;
5072 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5075 rsize = server->rsize;
5077 rsize = NFS_MAX_FILE_IO_SIZE;
5078 wsize = server->wsize;
5080 wsize = NFS_MAX_FILE_IO_SIZE;
5082 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5083 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5085 ret = nfs4_recover_expired_lease(server);
5087 ret = nfs4_check_client_ready(clp);
5092 * Renew the cl_session lease.
5094 struct nfs4_sequence_data {
5095 struct nfs_client *clp;
5096 struct nfs4_sequence_args args;
5097 struct nfs4_sequence_res res;
5100 static void nfs41_sequence_release(void *data)
5102 struct nfs4_sequence_data *calldata = data;
5103 struct nfs_client *clp = calldata->clp;
5105 if (atomic_read(&clp->cl_count) > 1)
5106 nfs4_schedule_state_renewal(clp);
5107 nfs_put_client(clp);
5111 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5113 switch(task->tk_status) {
5114 case -NFS4ERR_DELAY:
5116 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5119 nfs4_schedule_state_recovery(clp);
5124 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5126 struct nfs4_sequence_data *calldata = data;
5127 struct nfs_client *clp = calldata->clp;
5129 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5132 if (task->tk_status < 0) {
5133 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5134 if (atomic_read(&clp->cl_count) == 1)
5137 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5138 rpc_restart_call_prepare(task);
5142 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5144 dprintk("<-- %s\n", __func__);
5147 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5149 struct nfs4_sequence_data *calldata = data;
5150 struct nfs_client *clp = calldata->clp;
5151 struct nfs4_sequence_args *args;
5152 struct nfs4_sequence_res *res;
5154 args = task->tk_msg.rpc_argp;
5155 res = task->tk_msg.rpc_resp;
5157 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
5159 rpc_call_start(task);
5162 static const struct rpc_call_ops nfs41_sequence_ops = {
5163 .rpc_call_done = nfs41_sequence_call_done,
5164 .rpc_call_prepare = nfs41_sequence_prepare,
5165 .rpc_release = nfs41_sequence_release,
5168 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5170 struct nfs4_sequence_data *calldata;
5171 struct rpc_message msg = {
5172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5175 struct rpc_task_setup task_setup_data = {
5176 .rpc_client = clp->cl_rpcclient,
5177 .rpc_message = &msg,
5178 .callback_ops = &nfs41_sequence_ops,
5179 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5182 if (!atomic_inc_not_zero(&clp->cl_count))
5183 return ERR_PTR(-EIO);
5184 calldata = kmalloc(sizeof(*calldata), GFP_NOFS);
5185 if (calldata == NULL) {
5186 nfs_put_client(clp);
5187 return ERR_PTR(-ENOMEM);
5189 calldata->res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5190 msg.rpc_argp = &calldata->args;
5191 msg.rpc_resp = &calldata->res;
5192 calldata->clp = clp;
5193 task_setup_data.callback_data = calldata;
5195 return rpc_run_task(&task_setup_data);
5198 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5200 struct rpc_task *task;
5203 task = _nfs41_proc_sequence(clp, cred);
5205 ret = PTR_ERR(task);
5208 dprintk("<-- %s status=%d\n", __func__, ret);
5212 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5214 struct rpc_task *task;
5217 task = _nfs41_proc_sequence(clp, cred);
5219 ret = PTR_ERR(task);
5222 ret = rpc_wait_for_completion_task(task);
5224 ret = task->tk_status;
5227 dprintk("<-- %s status=%d\n", __func__, ret);
5231 struct nfs4_reclaim_complete_data {
5232 struct nfs_client *clp;
5233 struct nfs41_reclaim_complete_args arg;
5234 struct nfs41_reclaim_complete_res res;
5237 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5239 struct nfs4_reclaim_complete_data *calldata = data;
5241 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5242 if (nfs41_setup_sequence(calldata->clp->cl_session,
5243 &calldata->arg.seq_args,
5244 &calldata->res.seq_res, 0, task))
5247 rpc_call_start(task);
5250 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5252 switch(task->tk_status) {
5254 case -NFS4ERR_COMPLETE_ALREADY:
5255 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5257 case -NFS4ERR_DELAY:
5259 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5262 nfs4_schedule_state_recovery(clp);
5267 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5269 struct nfs4_reclaim_complete_data *calldata = data;
5270 struct nfs_client *clp = calldata->clp;
5271 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5273 dprintk("--> %s\n", __func__);
5274 if (!nfs41_sequence_done(task, res))
5277 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5278 rpc_restart_call_prepare(task);
5281 dprintk("<-- %s\n", __func__);
5284 static void nfs4_free_reclaim_complete_data(void *data)
5286 struct nfs4_reclaim_complete_data *calldata = data;
5291 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5292 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5293 .rpc_call_done = nfs4_reclaim_complete_done,
5294 .rpc_release = nfs4_free_reclaim_complete_data,
5298 * Issue a global reclaim complete.
5300 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5302 struct nfs4_reclaim_complete_data *calldata;
5303 struct rpc_task *task;
5304 struct rpc_message msg = {
5305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5307 struct rpc_task_setup task_setup_data = {
5308 .rpc_client = clp->cl_rpcclient,
5309 .rpc_message = &msg,
5310 .callback_ops = &nfs4_reclaim_complete_call_ops,
5311 .flags = RPC_TASK_ASYNC,
5313 int status = -ENOMEM;
5315 dprintk("--> %s\n", __func__);
5316 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5317 if (calldata == NULL)
5319 calldata->clp = clp;
5320 calldata->arg.one_fs = 0;
5321 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
5323 msg.rpc_argp = &calldata->arg;
5324 msg.rpc_resp = &calldata->res;
5325 task_setup_data.callback_data = calldata;
5326 task = rpc_run_task(&task_setup_data);
5328 status = PTR_ERR(task);
5334 dprintk("<-- %s status=%d\n", __func__, status);
5337 #endif /* CONFIG_NFS_V4_1 */
5339 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5340 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5341 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5342 .recover_open = nfs4_open_reclaim,
5343 .recover_lock = nfs4_lock_reclaim,
5344 .establish_clid = nfs4_init_clientid,
5345 .get_clid_cred = nfs4_get_setclientid_cred,
5348 #if defined(CONFIG_NFS_V4_1)
5349 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5350 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5351 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5352 .recover_open = nfs4_open_reclaim,
5353 .recover_lock = nfs4_lock_reclaim,
5354 .establish_clid = nfs41_init_clientid,
5355 .get_clid_cred = nfs4_get_exchange_id_cred,
5356 .reclaim_complete = nfs41_proc_reclaim_complete,
5358 #endif /* CONFIG_NFS_V4_1 */
5360 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5361 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5362 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5363 .recover_open = nfs4_open_expired,
5364 .recover_lock = nfs4_lock_expired,
5365 .establish_clid = nfs4_init_clientid,
5366 .get_clid_cred = nfs4_get_setclientid_cred,
5369 #if defined(CONFIG_NFS_V4_1)
5370 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5371 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5372 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5373 .recover_open = nfs4_open_expired,
5374 .recover_lock = nfs4_lock_expired,
5375 .establish_clid = nfs41_init_clientid,
5376 .get_clid_cred = nfs4_get_exchange_id_cred,
5378 #endif /* CONFIG_NFS_V4_1 */
5380 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5381 .sched_state_renewal = nfs4_proc_async_renew,
5382 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5383 .renew_lease = nfs4_proc_renew,
5386 #if defined(CONFIG_NFS_V4_1)
5387 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5388 .sched_state_renewal = nfs41_proc_async_sequence,
5389 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5390 .renew_lease = nfs4_proc_sequence,
5394 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5396 .call_sync = _nfs4_call_sync,
5397 .validate_stateid = nfs4_validate_delegation_stateid,
5398 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5399 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5400 .state_renewal_ops = &nfs40_state_renewal_ops,
5403 #if defined(CONFIG_NFS_V4_1)
5404 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5406 .call_sync = _nfs4_call_sync_session,
5407 .validate_stateid = nfs41_validate_delegation_stateid,
5408 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5409 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5410 .state_renewal_ops = &nfs41_state_renewal_ops,
5414 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5415 [0] = &nfs_v4_0_minor_ops,
5416 #if defined(CONFIG_NFS_V4_1)
5417 [1] = &nfs_v4_1_minor_ops,
5421 static const struct inode_operations nfs4_file_inode_operations = {
5422 .permission = nfs_permission,
5423 .getattr = nfs_getattr,
5424 .setattr = nfs_setattr,
5425 .getxattr = nfs4_getxattr,
5426 .setxattr = nfs4_setxattr,
5427 .listxattr = nfs4_listxattr,
5430 const struct nfs_rpc_ops nfs_v4_clientops = {
5431 .version = 4, /* protocol version */
5432 .dentry_ops = &nfs4_dentry_operations,
5433 .dir_inode_ops = &nfs4_dir_inode_operations,
5434 .file_inode_ops = &nfs4_file_inode_operations,
5435 .getroot = nfs4_proc_get_root,
5436 .getattr = nfs4_proc_getattr,
5437 .setattr = nfs4_proc_setattr,
5438 .lookupfh = nfs4_proc_lookupfh,
5439 .lookup = nfs4_proc_lookup,
5440 .access = nfs4_proc_access,
5441 .readlink = nfs4_proc_readlink,
5442 .create = nfs4_proc_create,
5443 .remove = nfs4_proc_remove,
5444 .unlink_setup = nfs4_proc_unlink_setup,
5445 .unlink_done = nfs4_proc_unlink_done,
5446 .rename = nfs4_proc_rename,
5447 .link = nfs4_proc_link,
5448 .symlink = nfs4_proc_symlink,
5449 .mkdir = nfs4_proc_mkdir,
5450 .rmdir = nfs4_proc_remove,
5451 .readdir = nfs4_proc_readdir,
5452 .mknod = nfs4_proc_mknod,
5453 .statfs = nfs4_proc_statfs,
5454 .fsinfo = nfs4_proc_fsinfo,
5455 .pathconf = nfs4_proc_pathconf,
5456 .set_capabilities = nfs4_server_capabilities,
5457 .decode_dirent = nfs4_decode_dirent,
5458 .read_setup = nfs4_proc_read_setup,
5459 .read_done = nfs4_read_done,
5460 .write_setup = nfs4_proc_write_setup,
5461 .write_done = nfs4_write_done,
5462 .commit_setup = nfs4_proc_commit_setup,
5463 .commit_done = nfs4_commit_done,
5464 .lock = nfs4_proc_lock,
5465 .clear_acl_cache = nfs4_zap_acl_attr,
5466 .close_context = nfs4_close_context,