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>
52 #include <linux/xattr.h>
53 #include <linux/utsname.h>
57 #include "delegation.h"
63 #define NFSDBG_FACILITY NFSDBG_PROC
65 #define NFS4_POLL_RETRY_MIN (HZ/10)
66 #define NFS4_POLL_RETRY_MAX (15*HZ)
68 #define NFS4_MAX_LOOP_ON_RECOVER (10)
71 static int _nfs4_proc_open(struct nfs4_opendata *data);
72 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
73 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
74 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
75 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
76 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
77 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
78 struct nfs_fattr *fattr, struct iattr *sattr,
79 struct nfs4_state *state);
81 /* Prevent leaks of NFSv4 errors into userland */
82 static int nfs4_map_errors(int err)
87 case -NFS4ERR_RESOURCE:
90 dprintk("%s could not handle NFSv4 error %d\n",
98 * This is our standard bitmap for GETATTR requests.
100 const u32 nfs4_fattr_bitmap[2] = {
102 | FATTR4_WORD0_CHANGE
105 | FATTR4_WORD0_FILEID,
107 | FATTR4_WORD1_NUMLINKS
109 | FATTR4_WORD1_OWNER_GROUP
110 | FATTR4_WORD1_RAWDEV
111 | FATTR4_WORD1_SPACE_USED
112 | FATTR4_WORD1_TIME_ACCESS
113 | FATTR4_WORD1_TIME_METADATA
114 | FATTR4_WORD1_TIME_MODIFY
117 const u32 nfs4_statfs_bitmap[2] = {
118 FATTR4_WORD0_FILES_AVAIL
119 | FATTR4_WORD0_FILES_FREE
120 | FATTR4_WORD0_FILES_TOTAL,
121 FATTR4_WORD1_SPACE_AVAIL
122 | FATTR4_WORD1_SPACE_FREE
123 | FATTR4_WORD1_SPACE_TOTAL
126 const u32 nfs4_pathconf_bitmap[2] = {
128 | FATTR4_WORD0_MAXNAME,
132 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
133 | FATTR4_WORD0_MAXREAD
134 | FATTR4_WORD0_MAXWRITE
135 | FATTR4_WORD0_LEASE_TIME,
136 FATTR4_WORD1_TIME_DELTA
137 | FATTR4_WORD1_FS_LAYOUT_TYPES
140 const u32 nfs4_fs_locations_bitmap[2] = {
142 | FATTR4_WORD0_CHANGE
145 | FATTR4_WORD0_FILEID
146 | FATTR4_WORD0_FS_LOCATIONS,
148 | FATTR4_WORD1_NUMLINKS
150 | FATTR4_WORD1_OWNER_GROUP
151 | FATTR4_WORD1_RAWDEV
152 | FATTR4_WORD1_SPACE_USED
153 | FATTR4_WORD1_TIME_ACCESS
154 | FATTR4_WORD1_TIME_METADATA
155 | FATTR4_WORD1_TIME_MODIFY
156 | FATTR4_WORD1_MOUNTED_ON_FILEID
159 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
160 struct nfs4_readdir_arg *readdir)
164 BUG_ON(readdir->count < 80);
166 readdir->cookie = cookie;
167 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
172 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
177 * NFSv4 servers do not return entries for '.' and '..'
178 * Therefore, we fake these entries here. We let '.'
179 * have cookie 0 and '..' have cookie 1. Note that
180 * when talking to the server, we always send cookie 0
183 start = p = kmap_atomic(*readdir->pages, KM_USER0);
186 *p++ = xdr_one; /* next */
187 *p++ = xdr_zero; /* cookie, first word */
188 *p++ = xdr_one; /* cookie, second word */
189 *p++ = xdr_one; /* entry len */
190 memcpy(p, ".\0\0\0", 4); /* entry */
192 *p++ = xdr_one; /* bitmap length */
193 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
194 *p++ = htonl(8); /* attribute buffer length */
195 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
198 *p++ = xdr_one; /* next */
199 *p++ = xdr_zero; /* cookie, first word */
200 *p++ = xdr_two; /* cookie, second word */
201 *p++ = xdr_two; /* entry len */
202 memcpy(p, "..\0\0", 4); /* entry */
204 *p++ = xdr_one; /* bitmap length */
205 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
206 *p++ = htonl(8); /* attribute buffer length */
207 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
209 readdir->pgbase = (char *)p - (char *)start;
210 readdir->count -= readdir->pgbase;
211 kunmap_atomic(start, KM_USER0);
214 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
220 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
221 nfs_wait_bit_killable, TASK_KILLABLE);
225 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
232 *timeout = NFS4_POLL_RETRY_MIN;
233 if (*timeout > NFS4_POLL_RETRY_MAX)
234 *timeout = NFS4_POLL_RETRY_MAX;
235 schedule_timeout_killable(*timeout);
236 if (fatal_signal_pending(current))
242 /* This is the error handling routine for processes that are allowed
245 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
247 struct nfs_client *clp = server->nfs_client;
248 struct nfs4_state *state = exception->state;
251 exception->retry = 0;
255 case -NFS4ERR_ADMIN_REVOKED:
256 case -NFS4ERR_BAD_STATEID:
257 case -NFS4ERR_OPENMODE:
260 nfs4_state_mark_reclaim_nograce(clp, state);
261 goto do_state_recovery;
262 case -NFS4ERR_STALE_STATEID:
263 case -NFS4ERR_STALE_CLIENTID:
264 case -NFS4ERR_EXPIRED:
265 goto do_state_recovery;
266 #if defined(CONFIG_NFS_V4_1)
267 case -NFS4ERR_BADSESSION:
268 case -NFS4ERR_BADSLOT:
269 case -NFS4ERR_BAD_HIGH_SLOT:
270 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
271 case -NFS4ERR_DEADSESSION:
272 case -NFS4ERR_SEQ_FALSE_RETRY:
273 case -NFS4ERR_SEQ_MISORDERED:
274 dprintk("%s ERROR: %d Reset session\n", __func__,
276 nfs4_schedule_state_recovery(clp);
277 exception->retry = 1;
279 #endif /* defined(CONFIG_NFS_V4_1) */
280 case -NFS4ERR_FILE_OPEN:
281 if (exception->timeout > HZ) {
282 /* We have retried a decent amount, time to
291 ret = nfs4_delay(server->client, &exception->timeout);
294 case -NFS4ERR_OLD_STATEID:
295 exception->retry = 1;
297 /* We failed to handle the error */
298 return nfs4_map_errors(ret);
300 nfs4_schedule_state_recovery(clp);
301 ret = nfs4_wait_clnt_recover(clp);
303 exception->retry = 1;
308 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
310 spin_lock(&clp->cl_lock);
311 if (time_before(clp->cl_last_renewal,timestamp))
312 clp->cl_last_renewal = timestamp;
313 spin_unlock(&clp->cl_lock);
316 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
318 do_renew_lease(server->nfs_client, timestamp);
321 #if defined(CONFIG_NFS_V4_1)
324 * nfs4_free_slot - free a slot and efficiently update slot table.
326 * freeing a slot is trivially done by clearing its respective bit
328 * If the freed slotid equals highest_used_slotid we want to update it
329 * so that the server would be able to size down the slot table if needed,
330 * otherwise we know that the highest_used_slotid is still in use.
331 * When updating highest_used_slotid there may be "holes" in the bitmap
332 * so we need to scan down from highest_used_slotid to 0 looking for the now
333 * highest slotid in use.
334 * If none found, highest_used_slotid is set to -1.
336 * Must be called while holding tbl->slot_tbl_lock
339 nfs4_free_slot(struct nfs4_slot_table *tbl, struct nfs4_slot *free_slot)
341 int free_slotid = free_slot - tbl->slots;
342 int slotid = free_slotid;
344 BUG_ON(slotid < 0 || slotid >= NFS4_MAX_SLOT_TABLE);
345 /* clear used bit in bitmap */
346 __clear_bit(slotid, tbl->used_slots);
348 /* update highest_used_slotid when it is freed */
349 if (slotid == tbl->highest_used_slotid) {
350 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
351 if (slotid < tbl->max_slots)
352 tbl->highest_used_slotid = slotid;
354 tbl->highest_used_slotid = -1;
356 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
357 free_slotid, tbl->highest_used_slotid);
361 * Signal state manager thread if session fore channel is drained
363 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
365 struct rpc_task *task;
367 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
368 task = rpc_wake_up_next(&ses->fc_slot_table.slot_tbl_waitq);
370 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
374 if (ses->fc_slot_table.highest_used_slotid != -1)
377 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
378 complete(&ses->fc_slot_table.complete);
382 * Signal state manager thread if session back channel is drained
384 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
386 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
387 ses->bc_slot_table.highest_used_slotid != -1)
389 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
390 complete(&ses->bc_slot_table.complete);
393 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
395 struct nfs4_slot_table *tbl;
397 tbl = &res->sr_session->fc_slot_table;
399 /* just wake up the next guy waiting since
400 * we may have not consumed a slot after all */
401 dprintk("%s: No slot\n", __func__);
405 spin_lock(&tbl->slot_tbl_lock);
406 nfs4_free_slot(tbl, res->sr_slot);
407 nfs4_check_drain_fc_complete(res->sr_session);
408 spin_unlock(&tbl->slot_tbl_lock);
412 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
414 unsigned long timestamp;
415 struct nfs_client *clp;
418 * sr_status remains 1 if an RPC level error occurred. The server
419 * may or may not have processed the sequence operation..
420 * Proceed as if the server received and processed the sequence
423 if (res->sr_status == 1)
424 res->sr_status = NFS_OK;
426 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
430 /* Check the SEQUENCE operation status */
431 switch (res->sr_status) {
433 /* Update the slot's sequence and clientid lease timer */
434 ++res->sr_slot->seq_nr;
435 timestamp = res->sr_renewal_time;
436 clp = res->sr_session->clp;
437 do_renew_lease(clp, timestamp);
438 /* Check sequence flags */
439 if (atomic_read(&clp->cl_count) > 1)
440 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
443 /* The server detected a resend of the RPC call and
444 * returned NFS4ERR_DELAY as per Section 2.10.6.2
447 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
449 res->sr_slot - res->sr_session->fc_slot_table.slots,
450 res->sr_slot->seq_nr);
453 /* Just update the slot sequence no. */
454 ++res->sr_slot->seq_nr;
457 /* The session may be reset by one of the error handlers. */
458 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
459 nfs41_sequence_free_slot(res);
462 if (!rpc_restart_call(task))
464 rpc_delay(task, NFS4_POLL_RETRY_MAX);
468 static int nfs4_sequence_done(struct rpc_task *task,
469 struct nfs4_sequence_res *res)
471 if (res->sr_session == NULL)
473 return nfs41_sequence_done(task, res);
477 * nfs4_find_slot - efficiently look for a free slot
479 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
480 * If found, we mark the slot as used, update the highest_used_slotid,
481 * and respectively set up the sequence operation args.
482 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
484 * Note: must be called with under the slot_tbl_lock.
487 nfs4_find_slot(struct nfs4_slot_table *tbl)
490 u8 ret_id = NFS4_MAX_SLOT_TABLE;
491 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
493 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
494 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
496 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
497 if (slotid >= tbl->max_slots)
499 __set_bit(slotid, tbl->used_slots);
500 if (slotid > tbl->highest_used_slotid)
501 tbl->highest_used_slotid = slotid;
504 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
505 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
509 static int nfs41_setup_sequence(struct nfs4_session *session,
510 struct nfs4_sequence_args *args,
511 struct nfs4_sequence_res *res,
513 struct rpc_task *task)
515 struct nfs4_slot *slot;
516 struct nfs4_slot_table *tbl;
519 dprintk("--> %s\n", __func__);
520 /* slot already allocated? */
521 if (res->sr_slot != NULL)
524 tbl = &session->fc_slot_table;
526 spin_lock(&tbl->slot_tbl_lock);
527 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
528 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
530 * The state manager will wait until the slot table is empty.
531 * Schedule the reset thread
533 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
534 spin_unlock(&tbl->slot_tbl_lock);
535 dprintk("%s Schedule Session Reset\n", __func__);
539 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
540 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
541 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
542 spin_unlock(&tbl->slot_tbl_lock);
543 dprintk("%s enforce FIFO order\n", __func__);
547 slotid = nfs4_find_slot(tbl);
548 if (slotid == NFS4_MAX_SLOT_TABLE) {
549 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
550 spin_unlock(&tbl->slot_tbl_lock);
551 dprintk("<-- %s: no free slots\n", __func__);
554 spin_unlock(&tbl->slot_tbl_lock);
556 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
557 slot = tbl->slots + slotid;
558 args->sa_session = session;
559 args->sa_slotid = slotid;
560 args->sa_cache_this = cache_reply;
562 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
564 res->sr_session = session;
566 res->sr_renewal_time = jiffies;
567 res->sr_status_flags = 0;
569 * sr_status is only set in decode_sequence, and so will remain
570 * set to 1 if an rpc level failure occurs.
576 int nfs4_setup_sequence(const struct nfs_server *server,
577 struct nfs4_sequence_args *args,
578 struct nfs4_sequence_res *res,
580 struct rpc_task *task)
582 struct nfs4_session *session = nfs4_get_session(server);
585 if (session == NULL) {
586 args->sa_session = NULL;
587 res->sr_session = NULL;
591 dprintk("--> %s clp %p session %p sr_slot %td\n",
592 __func__, session->clp, session, res->sr_slot ?
593 res->sr_slot - session->fc_slot_table.slots : -1);
595 ret = nfs41_setup_sequence(session, args, res, cache_reply,
598 dprintk("<-- %s status=%d\n", __func__, ret);
602 struct nfs41_call_sync_data {
603 const struct nfs_server *seq_server;
604 struct nfs4_sequence_args *seq_args;
605 struct nfs4_sequence_res *seq_res;
609 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
611 struct nfs41_call_sync_data *data = calldata;
613 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
615 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
616 data->seq_res, data->cache_reply, task))
618 rpc_call_start(task);
621 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
623 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
624 nfs41_call_sync_prepare(task, calldata);
627 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
629 struct nfs41_call_sync_data *data = calldata;
631 nfs41_sequence_done(task, data->seq_res);
634 struct rpc_call_ops nfs41_call_sync_ops = {
635 .rpc_call_prepare = nfs41_call_sync_prepare,
636 .rpc_call_done = nfs41_call_sync_done,
639 struct rpc_call_ops nfs41_call_priv_sync_ops = {
640 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
641 .rpc_call_done = nfs41_call_sync_done,
644 static int nfs4_call_sync_sequence(struct nfs_server *server,
645 struct rpc_message *msg,
646 struct nfs4_sequence_args *args,
647 struct nfs4_sequence_res *res,
652 struct rpc_task *task;
653 struct nfs41_call_sync_data data = {
654 .seq_server = server,
657 .cache_reply = cache_reply,
659 struct rpc_task_setup task_setup = {
660 .rpc_client = server->client,
662 .callback_ops = &nfs41_call_sync_ops,
663 .callback_data = &data
668 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
669 task = rpc_run_task(&task_setup);
673 ret = task->tk_status;
679 int _nfs4_call_sync_session(struct nfs_server *server,
680 struct rpc_message *msg,
681 struct nfs4_sequence_args *args,
682 struct nfs4_sequence_res *res,
685 return nfs4_call_sync_sequence(server, msg, args, res, cache_reply, 0);
689 static int nfs4_sequence_done(struct rpc_task *task,
690 struct nfs4_sequence_res *res)
694 #endif /* CONFIG_NFS_V4_1 */
696 int _nfs4_call_sync(struct nfs_server *server,
697 struct rpc_message *msg,
698 struct nfs4_sequence_args *args,
699 struct nfs4_sequence_res *res,
702 args->sa_session = res->sr_session = NULL;
703 return rpc_call_sync(server->client, msg, 0);
706 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
707 (server)->nfs_client->cl_mvops->call_sync((server), (msg), &(args)->seq_args, \
708 &(res)->seq_res, (cache_reply))
710 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
712 struct nfs_inode *nfsi = NFS_I(dir);
714 spin_lock(&dir->i_lock);
715 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
716 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
717 nfs_force_lookup_revalidate(dir);
718 nfsi->change_attr = cinfo->after;
719 spin_unlock(&dir->i_lock);
722 struct nfs4_opendata {
724 struct nfs_openargs o_arg;
725 struct nfs_openres o_res;
726 struct nfs_open_confirmargs c_arg;
727 struct nfs_open_confirmres c_res;
728 struct nfs_fattr f_attr;
729 struct nfs_fattr dir_attr;
732 struct nfs4_state_owner *owner;
733 struct nfs4_state *state;
735 unsigned long timestamp;
736 unsigned int rpc_done : 1;
742 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
744 p->o_res.f_attr = &p->f_attr;
745 p->o_res.dir_attr = &p->dir_attr;
746 p->o_res.seqid = p->o_arg.seqid;
747 p->c_res.seqid = p->c_arg.seqid;
748 p->o_res.server = p->o_arg.server;
749 nfs_fattr_init(&p->f_attr);
750 nfs_fattr_init(&p->dir_attr);
753 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
754 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
755 const struct iattr *attrs,
758 struct dentry *parent = dget_parent(path->dentry);
759 struct inode *dir = parent->d_inode;
760 struct nfs_server *server = NFS_SERVER(dir);
761 struct nfs4_opendata *p;
763 p = kzalloc(sizeof(*p), gfp_mask);
766 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
767 if (p->o_arg.seqid == NULL)
773 atomic_inc(&sp->so_count);
774 p->o_arg.fh = NFS_FH(dir);
775 p->o_arg.open_flags = flags;
776 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
777 p->o_arg.clientid = server->nfs_client->cl_clientid;
778 p->o_arg.id = sp->so_owner_id.id;
779 p->o_arg.name = &p->path.dentry->d_name;
780 p->o_arg.server = server;
781 p->o_arg.bitmask = server->attr_bitmask;
782 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
783 if (flags & O_CREAT) {
786 p->o_arg.u.attrs = &p->attrs;
787 memcpy(&p->attrs, attrs, sizeof(p->attrs));
788 s = (u32 *) p->o_arg.u.verifier.data;
792 p->c_arg.fh = &p->o_res.fh;
793 p->c_arg.stateid = &p->o_res.stateid;
794 p->c_arg.seqid = p->o_arg.seqid;
795 nfs4_init_opendata_res(p);
805 static void nfs4_opendata_free(struct kref *kref)
807 struct nfs4_opendata *p = container_of(kref,
808 struct nfs4_opendata, kref);
810 nfs_free_seqid(p->o_arg.seqid);
811 if (p->state != NULL)
812 nfs4_put_open_state(p->state);
813 nfs4_put_state_owner(p->owner);
819 static void nfs4_opendata_put(struct nfs4_opendata *p)
822 kref_put(&p->kref, nfs4_opendata_free);
825 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
829 ret = rpc_wait_for_completion_task(task);
833 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
837 if (open_mode & O_EXCL)
839 switch (mode & (FMODE_READ|FMODE_WRITE)) {
841 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
842 && state->n_rdonly != 0;
845 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
846 && state->n_wronly != 0;
848 case FMODE_READ|FMODE_WRITE:
849 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
850 && state->n_rdwr != 0;
856 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
858 if ((delegation->type & fmode) != fmode)
860 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
862 nfs_mark_delegation_referenced(delegation);
866 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
875 case FMODE_READ|FMODE_WRITE:
878 nfs4_state_set_mode_locked(state, state->state | fmode);
881 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
883 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
884 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
885 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
888 set_bit(NFS_O_RDONLY_STATE, &state->flags);
891 set_bit(NFS_O_WRONLY_STATE, &state->flags);
893 case FMODE_READ|FMODE_WRITE:
894 set_bit(NFS_O_RDWR_STATE, &state->flags);
898 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
900 write_seqlock(&state->seqlock);
901 nfs_set_open_stateid_locked(state, stateid, fmode);
902 write_sequnlock(&state->seqlock);
905 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
908 * Protect the call to nfs4_state_set_mode_locked and
909 * serialise the stateid update
911 write_seqlock(&state->seqlock);
912 if (deleg_stateid != NULL) {
913 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
914 set_bit(NFS_DELEGATED_STATE, &state->flags);
916 if (open_stateid != NULL)
917 nfs_set_open_stateid_locked(state, open_stateid, fmode);
918 write_sequnlock(&state->seqlock);
919 spin_lock(&state->owner->so_lock);
920 update_open_stateflags(state, fmode);
921 spin_unlock(&state->owner->so_lock);
924 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
926 struct nfs_inode *nfsi = NFS_I(state->inode);
927 struct nfs_delegation *deleg_cur;
930 fmode &= (FMODE_READ|FMODE_WRITE);
933 deleg_cur = rcu_dereference(nfsi->delegation);
934 if (deleg_cur == NULL)
937 spin_lock(&deleg_cur->lock);
938 if (nfsi->delegation != deleg_cur ||
939 (deleg_cur->type & fmode) != fmode)
940 goto no_delegation_unlock;
942 if (delegation == NULL)
943 delegation = &deleg_cur->stateid;
944 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
945 goto no_delegation_unlock;
947 nfs_mark_delegation_referenced(deleg_cur);
948 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
950 no_delegation_unlock:
951 spin_unlock(&deleg_cur->lock);
955 if (!ret && open_stateid != NULL) {
956 __update_open_stateid(state, open_stateid, NULL, fmode);
964 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
966 struct nfs_delegation *delegation;
969 delegation = rcu_dereference(NFS_I(inode)->delegation);
970 if (delegation == NULL || (delegation->type & fmode) == fmode) {
975 nfs_inode_return_delegation(inode);
978 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
980 struct nfs4_state *state = opendata->state;
981 struct nfs_inode *nfsi = NFS_I(state->inode);
982 struct nfs_delegation *delegation;
983 int open_mode = opendata->o_arg.open_flags & O_EXCL;
984 fmode_t fmode = opendata->o_arg.fmode;
985 nfs4_stateid stateid;
989 if (can_open_cached(state, fmode, open_mode)) {
990 spin_lock(&state->owner->so_lock);
991 if (can_open_cached(state, fmode, open_mode)) {
992 update_open_stateflags(state, fmode);
993 spin_unlock(&state->owner->so_lock);
994 goto out_return_state;
996 spin_unlock(&state->owner->so_lock);
999 delegation = rcu_dereference(nfsi->delegation);
1000 if (delegation == NULL ||
1001 !can_open_delegated(delegation, fmode)) {
1005 /* Save the delegation */
1006 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
1008 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1013 /* Try to update the stateid using the delegation */
1014 if (update_open_stateid(state, NULL, &stateid, fmode))
1015 goto out_return_state;
1018 return ERR_PTR(ret);
1020 atomic_inc(&state->count);
1024 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1026 struct inode *inode;
1027 struct nfs4_state *state = NULL;
1028 struct nfs_delegation *delegation;
1031 if (!data->rpc_done) {
1032 state = nfs4_try_open_cached(data);
1037 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1039 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1040 ret = PTR_ERR(inode);
1044 state = nfs4_get_open_state(inode, data->owner);
1047 if (data->o_res.delegation_type != 0) {
1048 int delegation_flags = 0;
1051 delegation = rcu_dereference(NFS_I(inode)->delegation);
1053 delegation_flags = delegation->flags;
1055 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1056 nfs_inode_set_delegation(state->inode,
1057 data->owner->so_cred,
1060 nfs_inode_reclaim_delegation(state->inode,
1061 data->owner->so_cred,
1065 update_open_stateid(state, &data->o_res.stateid, NULL,
1073 return ERR_PTR(ret);
1076 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1078 struct nfs_inode *nfsi = NFS_I(state->inode);
1079 struct nfs_open_context *ctx;
1081 spin_lock(&state->inode->i_lock);
1082 list_for_each_entry(ctx, &nfsi->open_files, list) {
1083 if (ctx->state != state)
1085 get_nfs_open_context(ctx);
1086 spin_unlock(&state->inode->i_lock);
1089 spin_unlock(&state->inode->i_lock);
1090 return ERR_PTR(-ENOENT);
1093 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1095 struct nfs4_opendata *opendata;
1097 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL, GFP_NOFS);
1098 if (opendata == NULL)
1099 return ERR_PTR(-ENOMEM);
1100 opendata->state = state;
1101 atomic_inc(&state->count);
1105 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1107 struct nfs4_state *newstate;
1110 opendata->o_arg.open_flags = 0;
1111 opendata->o_arg.fmode = fmode;
1112 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1113 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1114 nfs4_init_opendata_res(opendata);
1115 ret = _nfs4_recover_proc_open(opendata);
1118 newstate = nfs4_opendata_to_nfs4_state(opendata);
1119 if (IS_ERR(newstate))
1120 return PTR_ERR(newstate);
1121 nfs4_close_state(&opendata->path, newstate, fmode);
1126 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1128 struct nfs4_state *newstate;
1131 /* memory barrier prior to reading state->n_* */
1132 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1134 if (state->n_rdwr != 0) {
1135 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1136 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1139 if (newstate != state)
1142 if (state->n_wronly != 0) {
1143 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1144 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1147 if (newstate != state)
1150 if (state->n_rdonly != 0) {
1151 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1152 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1155 if (newstate != state)
1159 * We may have performed cached opens for all three recoveries.
1160 * Check if we need to update the current stateid.
1162 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1163 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1164 write_seqlock(&state->seqlock);
1165 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1166 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1167 write_sequnlock(&state->seqlock);
1174 * reclaim state on the server after a reboot.
1176 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1178 struct nfs_delegation *delegation;
1179 struct nfs4_opendata *opendata;
1180 fmode_t delegation_type = 0;
1183 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1184 if (IS_ERR(opendata))
1185 return PTR_ERR(opendata);
1186 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1187 opendata->o_arg.fh = NFS_FH(state->inode);
1189 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1190 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1191 delegation_type = delegation->type;
1193 opendata->o_arg.u.delegation_type = delegation_type;
1194 status = nfs4_open_recover(opendata, state);
1195 nfs4_opendata_put(opendata);
1199 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1201 struct nfs_server *server = NFS_SERVER(state->inode);
1202 struct nfs4_exception exception = { };
1205 err = _nfs4_do_open_reclaim(ctx, state);
1206 if (err != -NFS4ERR_DELAY)
1208 nfs4_handle_exception(server, err, &exception);
1209 } while (exception.retry);
1213 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1215 struct nfs_open_context *ctx;
1218 ctx = nfs4_state_find_open_context(state);
1220 return PTR_ERR(ctx);
1221 ret = nfs4_do_open_reclaim(ctx, state);
1222 put_nfs_open_context(ctx);
1226 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1228 struct nfs4_opendata *opendata;
1231 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1232 if (IS_ERR(opendata))
1233 return PTR_ERR(opendata);
1234 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1235 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1236 sizeof(opendata->o_arg.u.delegation.data));
1237 ret = nfs4_open_recover(opendata, state);
1238 nfs4_opendata_put(opendata);
1242 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1244 struct nfs4_exception exception = { };
1245 struct nfs_server *server = NFS_SERVER(state->inode);
1248 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1254 case -NFS4ERR_BADSESSION:
1255 case -NFS4ERR_BADSLOT:
1256 case -NFS4ERR_BAD_HIGH_SLOT:
1257 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1258 case -NFS4ERR_DEADSESSION:
1259 nfs4_schedule_state_recovery(
1260 server->nfs_client);
1262 case -NFS4ERR_STALE_CLIENTID:
1263 case -NFS4ERR_STALE_STATEID:
1264 case -NFS4ERR_EXPIRED:
1265 /* Don't recall a delegation if it was lost */
1266 nfs4_schedule_state_recovery(server->nfs_client);
1270 * The show must go on: exit, but mark the
1271 * stateid as needing recovery.
1273 case -NFS4ERR_ADMIN_REVOKED:
1274 case -NFS4ERR_BAD_STATEID:
1275 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1278 * User RPCSEC_GSS context has expired.
1279 * We cannot recover this stateid now, so
1280 * skip it and allow recovery thread to
1287 err = nfs4_handle_exception(server, err, &exception);
1288 } while (exception.retry);
1293 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1295 struct nfs4_opendata *data = calldata;
1297 data->rpc_status = task->tk_status;
1298 if (data->rpc_status == 0) {
1299 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1300 sizeof(data->o_res.stateid.data));
1301 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1302 renew_lease(data->o_res.server, data->timestamp);
1307 static void nfs4_open_confirm_release(void *calldata)
1309 struct nfs4_opendata *data = calldata;
1310 struct nfs4_state *state = NULL;
1312 /* If this request hasn't been cancelled, do nothing */
1313 if (data->cancelled == 0)
1315 /* In case of error, no cleanup! */
1316 if (!data->rpc_done)
1318 state = nfs4_opendata_to_nfs4_state(data);
1320 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1322 nfs4_opendata_put(data);
1325 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1326 .rpc_call_done = nfs4_open_confirm_done,
1327 .rpc_release = nfs4_open_confirm_release,
1331 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1333 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1335 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1336 struct rpc_task *task;
1337 struct rpc_message msg = {
1338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1339 .rpc_argp = &data->c_arg,
1340 .rpc_resp = &data->c_res,
1341 .rpc_cred = data->owner->so_cred,
1343 struct rpc_task_setup task_setup_data = {
1344 .rpc_client = server->client,
1345 .rpc_message = &msg,
1346 .callback_ops = &nfs4_open_confirm_ops,
1347 .callback_data = data,
1348 .workqueue = nfsiod_workqueue,
1349 .flags = RPC_TASK_ASYNC,
1353 kref_get(&data->kref);
1355 data->rpc_status = 0;
1356 data->timestamp = jiffies;
1357 task = rpc_run_task(&task_setup_data);
1359 return PTR_ERR(task);
1360 status = nfs4_wait_for_completion_rpc_task(task);
1362 data->cancelled = 1;
1365 status = data->rpc_status;
1370 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1372 struct nfs4_opendata *data = calldata;
1373 struct nfs4_state_owner *sp = data->owner;
1375 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1378 * Check if we still need to send an OPEN call, or if we can use
1379 * a delegation instead.
1381 if (data->state != NULL) {
1382 struct nfs_delegation *delegation;
1384 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1387 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1388 if (delegation != NULL &&
1389 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1395 /* Update sequence id. */
1396 data->o_arg.id = sp->so_owner_id.id;
1397 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1398 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1399 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1400 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1402 data->timestamp = jiffies;
1403 if (nfs4_setup_sequence(data->o_arg.server,
1404 &data->o_arg.seq_args,
1405 &data->o_res.seq_res, 1, task))
1407 rpc_call_start(task);
1410 task->tk_action = NULL;
1414 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1416 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1417 nfs4_open_prepare(task, calldata);
1420 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1422 struct nfs4_opendata *data = calldata;
1424 data->rpc_status = task->tk_status;
1426 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1429 if (task->tk_status == 0) {
1430 switch (data->o_res.f_attr->mode & S_IFMT) {
1434 data->rpc_status = -ELOOP;
1437 data->rpc_status = -EISDIR;
1440 data->rpc_status = -ENOTDIR;
1442 renew_lease(data->o_res.server, data->timestamp);
1443 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1444 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1449 static void nfs4_open_release(void *calldata)
1451 struct nfs4_opendata *data = calldata;
1452 struct nfs4_state *state = NULL;
1454 /* If this request hasn't been cancelled, do nothing */
1455 if (data->cancelled == 0)
1457 /* In case of error, no cleanup! */
1458 if (data->rpc_status != 0 || !data->rpc_done)
1460 /* In case we need an open_confirm, no cleanup! */
1461 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1463 state = nfs4_opendata_to_nfs4_state(data);
1465 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1467 nfs4_opendata_put(data);
1470 static const struct rpc_call_ops nfs4_open_ops = {
1471 .rpc_call_prepare = nfs4_open_prepare,
1472 .rpc_call_done = nfs4_open_done,
1473 .rpc_release = nfs4_open_release,
1476 static const struct rpc_call_ops nfs4_recover_open_ops = {
1477 .rpc_call_prepare = nfs4_recover_open_prepare,
1478 .rpc_call_done = nfs4_open_done,
1479 .rpc_release = nfs4_open_release,
1482 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1484 struct inode *dir = data->dir->d_inode;
1485 struct nfs_server *server = NFS_SERVER(dir);
1486 struct nfs_openargs *o_arg = &data->o_arg;
1487 struct nfs_openres *o_res = &data->o_res;
1488 struct rpc_task *task;
1489 struct rpc_message msg = {
1490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1493 .rpc_cred = data->owner->so_cred,
1495 struct rpc_task_setup task_setup_data = {
1496 .rpc_client = server->client,
1497 .rpc_message = &msg,
1498 .callback_ops = &nfs4_open_ops,
1499 .callback_data = data,
1500 .workqueue = nfsiod_workqueue,
1501 .flags = RPC_TASK_ASYNC,
1505 kref_get(&data->kref);
1507 data->rpc_status = 0;
1508 data->cancelled = 0;
1510 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1511 task = rpc_run_task(&task_setup_data);
1513 return PTR_ERR(task);
1514 status = nfs4_wait_for_completion_rpc_task(task);
1516 data->cancelled = 1;
1519 status = data->rpc_status;
1525 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1527 struct inode *dir = data->dir->d_inode;
1528 struct nfs_openres *o_res = &data->o_res;
1531 status = nfs4_run_open_task(data, 1);
1532 if (status != 0 || !data->rpc_done)
1535 nfs_refresh_inode(dir, o_res->dir_attr);
1537 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1538 status = _nfs4_proc_open_confirm(data);
1547 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1549 static int _nfs4_proc_open(struct nfs4_opendata *data)
1551 struct inode *dir = data->dir->d_inode;
1552 struct nfs_server *server = NFS_SERVER(dir);
1553 struct nfs_openargs *o_arg = &data->o_arg;
1554 struct nfs_openres *o_res = &data->o_res;
1557 status = nfs4_run_open_task(data, 0);
1558 if (status != 0 || !data->rpc_done)
1561 if (o_arg->open_flags & O_CREAT) {
1562 update_changeattr(dir, &o_res->cinfo);
1563 nfs_post_op_update_inode(dir, o_res->dir_attr);
1565 nfs_refresh_inode(dir, o_res->dir_attr);
1566 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1567 server->caps &= ~NFS_CAP_POSIX_LOCK;
1568 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1569 status = _nfs4_proc_open_confirm(data);
1573 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1574 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1578 static int nfs4_recover_expired_lease(struct nfs_server *server)
1580 struct nfs_client *clp = server->nfs_client;
1584 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1585 ret = nfs4_wait_clnt_recover(clp);
1588 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1589 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1591 nfs4_schedule_state_recovery(clp);
1599 * reclaim state on the server after a network partition.
1600 * Assumes caller holds the appropriate lock
1602 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1604 struct nfs4_opendata *opendata;
1607 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1608 if (IS_ERR(opendata))
1609 return PTR_ERR(opendata);
1610 ret = nfs4_open_recover(opendata, state);
1612 d_drop(ctx->path.dentry);
1613 nfs4_opendata_put(opendata);
1617 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1619 struct nfs_server *server = NFS_SERVER(state->inode);
1620 struct nfs4_exception exception = { };
1624 err = _nfs4_open_expired(ctx, state);
1628 case -NFS4ERR_GRACE:
1629 case -NFS4ERR_DELAY:
1630 nfs4_handle_exception(server, err, &exception);
1633 } while (exception.retry);
1638 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1640 struct nfs_open_context *ctx;
1643 ctx = nfs4_state_find_open_context(state);
1645 return PTR_ERR(ctx);
1646 ret = nfs4_do_open_expired(ctx, state);
1647 put_nfs_open_context(ctx);
1652 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1653 * fields corresponding to attributes that were used to store the verifier.
1654 * Make sure we clobber those fields in the later setattr call
1656 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1658 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1659 !(sattr->ia_valid & ATTR_ATIME_SET))
1660 sattr->ia_valid |= ATTR_ATIME;
1662 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1663 !(sattr->ia_valid & ATTR_MTIME_SET))
1664 sattr->ia_valid |= ATTR_MTIME;
1668 * Returns a referenced nfs4_state
1670 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)
1672 struct nfs4_state_owner *sp;
1673 struct nfs4_state *state = NULL;
1674 struct nfs_server *server = NFS_SERVER(dir);
1675 struct nfs4_opendata *opendata;
1678 /* Protect against reboot recovery conflicts */
1680 if (!(sp = nfs4_get_state_owner(server, cred))) {
1681 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1684 status = nfs4_recover_expired_lease(server);
1686 goto err_put_state_owner;
1687 if (path->dentry->d_inode != NULL)
1688 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1690 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr, GFP_KERNEL);
1691 if (opendata == NULL)
1692 goto err_put_state_owner;
1694 if (path->dentry->d_inode != NULL)
1695 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1697 status = _nfs4_proc_open(opendata);
1699 goto err_opendata_put;
1701 state = nfs4_opendata_to_nfs4_state(opendata);
1702 status = PTR_ERR(state);
1704 goto err_opendata_put;
1705 if (server->caps & NFS_CAP_POSIX_LOCK)
1706 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1708 if (opendata->o_arg.open_flags & O_EXCL) {
1709 nfs4_exclusive_attrset(opendata, sattr);
1711 nfs_fattr_init(opendata->o_res.f_attr);
1712 status = nfs4_do_setattr(state->inode, cred,
1713 opendata->o_res.f_attr, sattr,
1716 nfs_setattr_update_inode(state->inode, sattr);
1717 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1719 nfs4_opendata_put(opendata);
1720 nfs4_put_state_owner(sp);
1724 nfs4_opendata_put(opendata);
1725 err_put_state_owner:
1726 nfs4_put_state_owner(sp);
1733 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)
1735 struct nfs4_exception exception = { };
1736 struct nfs4_state *res;
1740 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1743 /* NOTE: BAD_SEQID means the server and client disagree about the
1744 * book-keeping w.r.t. state-changing operations
1745 * (OPEN/CLOSE/LOCK/LOCKU...)
1746 * It is actually a sign of a bug on the client or on the server.
1748 * If we receive a BAD_SEQID error in the particular case of
1749 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1750 * have unhashed the old state_owner for us, and that we can
1751 * therefore safely retry using a new one. We should still warn
1752 * the user though...
1754 if (status == -NFS4ERR_BAD_SEQID) {
1755 printk(KERN_WARNING "NFS: v4 server %s "
1756 " returned a bad sequence-id error!\n",
1757 NFS_SERVER(dir)->nfs_client->cl_hostname);
1758 exception.retry = 1;
1762 * BAD_STATEID on OPEN means that the server cancelled our
1763 * state before it received the OPEN_CONFIRM.
1764 * Recover by retrying the request as per the discussion
1765 * on Page 181 of RFC3530.
1767 if (status == -NFS4ERR_BAD_STATEID) {
1768 exception.retry = 1;
1771 if (status == -EAGAIN) {
1772 /* We must have found a delegation */
1773 exception.retry = 1;
1776 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1777 status, &exception));
1778 } while (exception.retry);
1782 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1783 struct nfs_fattr *fattr, struct iattr *sattr,
1784 struct nfs4_state *state)
1786 struct nfs_server *server = NFS_SERVER(inode);
1787 struct nfs_setattrargs arg = {
1788 .fh = NFS_FH(inode),
1791 .bitmask = server->attr_bitmask,
1793 struct nfs_setattrres res = {
1797 struct rpc_message msg = {
1798 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1803 unsigned long timestamp = jiffies;
1806 nfs_fattr_init(fattr);
1808 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1809 /* Use that stateid */
1810 } else if (state != NULL) {
1811 nfs4_copy_stateid(&arg.stateid, state, current->files, current->tgid);
1813 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1815 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1816 if (status == 0 && state != NULL)
1817 renew_lease(server, timestamp);
1821 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1822 struct nfs_fattr *fattr, struct iattr *sattr,
1823 struct nfs4_state *state)
1825 struct nfs_server *server = NFS_SERVER(inode);
1826 struct nfs4_exception exception = { };
1829 err = nfs4_handle_exception(server,
1830 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1832 } while (exception.retry);
1836 struct nfs4_closedata {
1838 struct inode *inode;
1839 struct nfs4_state *state;
1840 struct nfs_closeargs arg;
1841 struct nfs_closeres res;
1842 struct nfs_fattr fattr;
1843 unsigned long timestamp;
1848 static void nfs4_free_closedata(void *data)
1850 struct nfs4_closedata *calldata = data;
1851 struct nfs4_state_owner *sp = calldata->state->owner;
1854 pnfs_roc_release(calldata->state->inode);
1855 nfs4_put_open_state(calldata->state);
1856 nfs_free_seqid(calldata->arg.seqid);
1857 nfs4_put_state_owner(sp);
1858 path_put(&calldata->path);
1862 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
1865 spin_lock(&state->owner->so_lock);
1866 if (!(fmode & FMODE_READ))
1867 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1868 if (!(fmode & FMODE_WRITE))
1869 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1870 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1871 spin_unlock(&state->owner->so_lock);
1874 static void nfs4_close_done(struct rpc_task *task, void *data)
1876 struct nfs4_closedata *calldata = data;
1877 struct nfs4_state *state = calldata->state;
1878 struct nfs_server *server = NFS_SERVER(calldata->inode);
1880 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
1882 /* hmm. we are done with the inode, and in the process of freeing
1883 * the state_owner. we keep this around to process errors
1885 switch (task->tk_status) {
1888 pnfs_roc_set_barrier(state->inode,
1889 calldata->roc_barrier);
1890 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1891 renew_lease(server, calldata->timestamp);
1892 nfs4_close_clear_stateid_flags(state,
1893 calldata->arg.fmode);
1895 case -NFS4ERR_STALE_STATEID:
1896 case -NFS4ERR_OLD_STATEID:
1897 case -NFS4ERR_BAD_STATEID:
1898 case -NFS4ERR_EXPIRED:
1899 if (calldata->arg.fmode == 0)
1902 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
1903 rpc_restart_call_prepare(task);
1905 nfs_release_seqid(calldata->arg.seqid);
1906 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1909 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1911 struct nfs4_closedata *calldata = data;
1912 struct nfs4_state *state = calldata->state;
1915 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1918 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1919 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
1920 spin_lock(&state->owner->so_lock);
1921 /* Calculate the change in open mode */
1922 if (state->n_rdwr == 0) {
1923 if (state->n_rdonly == 0) {
1924 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
1925 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1926 calldata->arg.fmode &= ~FMODE_READ;
1928 if (state->n_wronly == 0) {
1929 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
1930 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
1931 calldata->arg.fmode &= ~FMODE_WRITE;
1934 spin_unlock(&state->owner->so_lock);
1937 /* Note: exit _without_ calling nfs4_close_done */
1938 task->tk_action = NULL;
1942 if (calldata->arg.fmode == 0) {
1943 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
1944 if (calldata->roc &&
1945 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
1946 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
1952 nfs_fattr_init(calldata->res.fattr);
1953 calldata->timestamp = jiffies;
1954 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
1955 &calldata->arg.seq_args, &calldata->res.seq_res,
1958 rpc_call_start(task);
1961 static const struct rpc_call_ops nfs4_close_ops = {
1962 .rpc_call_prepare = nfs4_close_prepare,
1963 .rpc_call_done = nfs4_close_done,
1964 .rpc_release = nfs4_free_closedata,
1968 * It is possible for data to be read/written from a mem-mapped file
1969 * after the sys_close call (which hits the vfs layer as a flush).
1970 * This means that we can't safely call nfsv4 close on a file until
1971 * the inode is cleared. This in turn means that we are not good
1972 * NFSv4 citizens - we do not indicate to the server to update the file's
1973 * share state even when we are done with one of the three share
1974 * stateid's in the inode.
1976 * NOTE: Caller must be holding the sp->so_owner semaphore!
1978 int nfs4_do_close(struct path *path, struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
1980 struct nfs_server *server = NFS_SERVER(state->inode);
1981 struct nfs4_closedata *calldata;
1982 struct nfs4_state_owner *sp = state->owner;
1983 struct rpc_task *task;
1984 struct rpc_message msg = {
1985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1986 .rpc_cred = state->owner->so_cred,
1988 struct rpc_task_setup task_setup_data = {
1989 .rpc_client = server->client,
1990 .rpc_message = &msg,
1991 .callback_ops = &nfs4_close_ops,
1992 .workqueue = nfsiod_workqueue,
1993 .flags = RPC_TASK_ASYNC,
1995 int status = -ENOMEM;
1997 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1998 if (calldata == NULL)
2000 calldata->inode = state->inode;
2001 calldata->state = state;
2002 calldata->arg.fh = NFS_FH(state->inode);
2003 calldata->arg.stateid = &state->open_stateid;
2004 /* Serialization for the sequence id */
2005 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2006 if (calldata->arg.seqid == NULL)
2007 goto out_free_calldata;
2008 calldata->arg.fmode = 0;
2009 calldata->arg.bitmask = server->cache_consistency_bitmask;
2010 calldata->res.fattr = &calldata->fattr;
2011 calldata->res.seqid = calldata->arg.seqid;
2012 calldata->res.server = server;
2013 calldata->roc = roc;
2015 calldata->path = *path;
2017 msg.rpc_argp = &calldata->arg;
2018 msg.rpc_resp = &calldata->res;
2019 task_setup_data.callback_data = calldata;
2020 task = rpc_run_task(&task_setup_data);
2022 return PTR_ERR(task);
2025 status = rpc_wait_for_completion_task(task);
2032 pnfs_roc_release(state->inode);
2033 nfs4_put_open_state(state);
2034 nfs4_put_state_owner(sp);
2038 static struct inode *
2039 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2041 struct nfs4_state *state;
2043 /* Protect against concurrent sillydeletes */
2044 state = nfs4_do_open(dir, &ctx->path, ctx->mode, open_flags, attr, ctx->cred);
2046 return ERR_CAST(state);
2048 return igrab(state->inode);
2051 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2053 if (ctx->state == NULL)
2056 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
2058 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
2061 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2063 struct nfs4_server_caps_arg args = {
2066 struct nfs4_server_caps_res res = {};
2067 struct rpc_message msg = {
2068 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2074 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2076 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2077 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2078 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2079 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2080 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2081 NFS_CAP_CTIME|NFS_CAP_MTIME);
2082 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2083 server->caps |= NFS_CAP_ACLS;
2084 if (res.has_links != 0)
2085 server->caps |= NFS_CAP_HARDLINKS;
2086 if (res.has_symlinks != 0)
2087 server->caps |= NFS_CAP_SYMLINKS;
2088 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2089 server->caps |= NFS_CAP_FILEID;
2090 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2091 server->caps |= NFS_CAP_MODE;
2092 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2093 server->caps |= NFS_CAP_NLINK;
2094 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2095 server->caps |= NFS_CAP_OWNER;
2096 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2097 server->caps |= NFS_CAP_OWNER_GROUP;
2098 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2099 server->caps |= NFS_CAP_ATIME;
2100 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2101 server->caps |= NFS_CAP_CTIME;
2102 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2103 server->caps |= NFS_CAP_MTIME;
2105 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2106 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2107 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2108 server->acl_bitmask = res.acl_bitmask;
2114 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2116 struct nfs4_exception exception = { };
2119 err = nfs4_handle_exception(server,
2120 _nfs4_server_capabilities(server, fhandle),
2122 } while (exception.retry);
2126 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2127 struct nfs_fsinfo *info)
2129 struct nfs4_lookup_root_arg args = {
2130 .bitmask = nfs4_fattr_bitmap,
2132 struct nfs4_lookup_res res = {
2134 .fattr = info->fattr,
2137 struct rpc_message msg = {
2138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2143 nfs_fattr_init(info->fattr);
2144 return nfs4_call_sync(server, &msg, &args, &res, 0);
2147 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2148 struct nfs_fsinfo *info)
2150 struct nfs4_exception exception = { };
2153 err = nfs4_handle_exception(server,
2154 _nfs4_lookup_root(server, fhandle, info),
2156 } while (exception.retry);
2161 * get the file handle for the "/" directory on the server
2163 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2164 struct nfs_fsinfo *info)
2168 status = nfs4_lookup_root(server, fhandle, info);
2170 status = nfs4_server_capabilities(server, fhandle);
2172 status = nfs4_do_fsinfo(server, fhandle, info);
2173 return nfs4_map_errors(status);
2177 * Get locations and (maybe) other attributes of a referral.
2178 * Note that we'll actually follow the referral later when
2179 * we detect fsid mismatch in inode revalidation
2181 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2183 int status = -ENOMEM;
2184 struct page *page = NULL;
2185 struct nfs4_fs_locations *locations = NULL;
2187 page = alloc_page(GFP_KERNEL);
2190 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2191 if (locations == NULL)
2194 status = nfs4_proc_fs_locations(dir, name, locations, page);
2197 /* Make sure server returned a different fsid for the referral */
2198 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2199 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2204 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2205 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2207 fattr->mode = S_IFDIR;
2208 memset(fhandle, 0, sizeof(struct nfs_fh));
2216 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2218 struct nfs4_getattr_arg args = {
2220 .bitmask = server->attr_bitmask,
2222 struct nfs4_getattr_res res = {
2226 struct rpc_message msg = {
2227 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2232 nfs_fattr_init(fattr);
2233 return nfs4_call_sync(server, &msg, &args, &res, 0);
2236 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2238 struct nfs4_exception exception = { };
2241 err = nfs4_handle_exception(server,
2242 _nfs4_proc_getattr(server, fhandle, fattr),
2244 } while (exception.retry);
2249 * The file is not closed if it is opened due to the a request to change
2250 * the size of the file. The open call will not be needed once the
2251 * VFS layer lookup-intents are implemented.
2253 * Close is called when the inode is destroyed.
2254 * If we haven't opened the file for O_WRONLY, we
2255 * need to in the size_change case to obtain a stateid.
2258 * Because OPEN is always done by name in nfsv4, it is
2259 * possible that we opened a different file by the same
2260 * name. We can recognize this race condition, but we
2261 * can't do anything about it besides returning an error.
2263 * This will be fixed with VFS changes (lookup-intent).
2266 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2267 struct iattr *sattr)
2269 struct inode *inode = dentry->d_inode;
2270 struct rpc_cred *cred = NULL;
2271 struct nfs4_state *state = NULL;
2274 nfs_fattr_init(fattr);
2276 /* Search for an existing open(O_WRITE) file */
2277 if (sattr->ia_valid & ATTR_FILE) {
2278 struct nfs_open_context *ctx;
2280 ctx = nfs_file_open_context(sattr->ia_file);
2287 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2289 nfs_setattr_update_inode(inode, sattr);
2293 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2294 const struct qstr *name, struct nfs_fh *fhandle,
2295 struct nfs_fattr *fattr)
2298 struct nfs4_lookup_arg args = {
2299 .bitmask = server->attr_bitmask,
2303 struct nfs4_lookup_res res = {
2308 struct rpc_message msg = {
2309 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2314 nfs_fattr_init(fattr);
2316 dprintk("NFS call lookupfh %s\n", name->name);
2317 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2318 dprintk("NFS reply lookupfh: %d\n", status);
2322 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2323 struct qstr *name, struct nfs_fh *fhandle,
2324 struct nfs_fattr *fattr)
2326 struct nfs4_exception exception = { };
2329 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2331 if (err == -NFS4ERR_MOVED) {
2335 err = nfs4_handle_exception(server, err, &exception);
2336 } while (exception.retry);
2340 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2341 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2345 dprintk("NFS call lookup %s\n", name->name);
2346 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2347 if (status == -NFS4ERR_MOVED)
2348 status = nfs4_get_referral(dir, name, fattr, fhandle);
2349 dprintk("NFS reply lookup: %d\n", status);
2353 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2355 struct nfs4_exception exception = { };
2358 err = nfs4_handle_exception(NFS_SERVER(dir),
2359 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2361 } while (exception.retry);
2365 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2367 struct nfs_server *server = NFS_SERVER(inode);
2368 struct nfs4_accessargs args = {
2369 .fh = NFS_FH(inode),
2370 .bitmask = server->attr_bitmask,
2372 struct nfs4_accessres res = {
2375 struct rpc_message msg = {
2376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2379 .rpc_cred = entry->cred,
2381 int mode = entry->mask;
2385 * Determine which access bits we want to ask for...
2387 if (mode & MAY_READ)
2388 args.access |= NFS4_ACCESS_READ;
2389 if (S_ISDIR(inode->i_mode)) {
2390 if (mode & MAY_WRITE)
2391 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2392 if (mode & MAY_EXEC)
2393 args.access |= NFS4_ACCESS_LOOKUP;
2395 if (mode & MAY_WRITE)
2396 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2397 if (mode & MAY_EXEC)
2398 args.access |= NFS4_ACCESS_EXECUTE;
2401 res.fattr = nfs_alloc_fattr();
2402 if (res.fattr == NULL)
2405 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2408 if (res.access & NFS4_ACCESS_READ)
2409 entry->mask |= MAY_READ;
2410 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2411 entry->mask |= MAY_WRITE;
2412 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2413 entry->mask |= MAY_EXEC;
2414 nfs_refresh_inode(inode, res.fattr);
2416 nfs_free_fattr(res.fattr);
2420 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2422 struct nfs4_exception exception = { };
2425 err = nfs4_handle_exception(NFS_SERVER(inode),
2426 _nfs4_proc_access(inode, entry),
2428 } while (exception.retry);
2433 * TODO: For the time being, we don't try to get any attributes
2434 * along with any of the zero-copy operations READ, READDIR,
2437 * In the case of the first three, we want to put the GETATTR
2438 * after the read-type operation -- this is because it is hard
2439 * to predict the length of a GETATTR response in v4, and thus
2440 * align the READ data correctly. This means that the GETATTR
2441 * may end up partially falling into the page cache, and we should
2442 * shift it into the 'tail' of the xdr_buf before processing.
2443 * To do this efficiently, we need to know the total length
2444 * of data received, which doesn't seem to be available outside
2447 * In the case of WRITE, we also want to put the GETATTR after
2448 * the operation -- in this case because we want to make sure
2449 * we get the post-operation mtime and size. This means that
2450 * we can't use xdr_encode_pages() as written: we need a variant
2451 * of it which would leave room in the 'tail' iovec.
2453 * Both of these changes to the XDR layer would in fact be quite
2454 * minor, but I decided to leave them for a subsequent patch.
2456 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2457 unsigned int pgbase, unsigned int pglen)
2459 struct nfs4_readlink args = {
2460 .fh = NFS_FH(inode),
2465 struct nfs4_readlink_res res;
2466 struct rpc_message msg = {
2467 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2472 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2475 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2476 unsigned int pgbase, unsigned int pglen)
2478 struct nfs4_exception exception = { };
2481 err = nfs4_handle_exception(NFS_SERVER(inode),
2482 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2484 } while (exception.retry);
2490 * We will need to arrange for the VFS layer to provide an atomic open.
2491 * Until then, this create/open method is prone to inefficiency and race
2492 * conditions due to the lookup, create, and open VFS calls from sys_open()
2493 * placed on the wire.
2495 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2496 * The file will be opened again in the subsequent VFS open call
2497 * (nfs4_proc_file_open).
2499 * The open for read will just hang around to be used by any process that
2500 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2504 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2505 int flags, struct nfs_open_context *ctx)
2507 struct path my_path = {
2510 struct path *path = &my_path;
2511 struct nfs4_state *state;
2512 struct rpc_cred *cred = NULL;
2521 sattr->ia_mode &= ~current_umask();
2522 state = nfs4_do_open(dir, path, fmode, flags, sattr, cred);
2524 if (IS_ERR(state)) {
2525 status = PTR_ERR(state);
2528 d_add(dentry, igrab(state->inode));
2529 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2533 nfs4_close_sync(path, state, fmode);
2538 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2540 struct nfs_server *server = NFS_SERVER(dir);
2541 struct nfs_removeargs args = {
2543 .name.len = name->len,
2544 .name.name = name->name,
2545 .bitmask = server->attr_bitmask,
2547 struct nfs_removeres res = {
2550 struct rpc_message msg = {
2551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2555 int status = -ENOMEM;
2557 res.dir_attr = nfs_alloc_fattr();
2558 if (res.dir_attr == NULL)
2561 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2563 update_changeattr(dir, &res.cinfo);
2564 nfs_post_op_update_inode(dir, res.dir_attr);
2566 nfs_free_fattr(res.dir_attr);
2571 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2573 struct nfs4_exception exception = { };
2576 err = nfs4_handle_exception(NFS_SERVER(dir),
2577 _nfs4_proc_remove(dir, name),
2579 } while (exception.retry);
2583 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2585 struct nfs_server *server = NFS_SERVER(dir);
2586 struct nfs_removeargs *args = msg->rpc_argp;
2587 struct nfs_removeres *res = msg->rpc_resp;
2589 args->bitmask = server->cache_consistency_bitmask;
2590 res->server = server;
2591 res->seq_res.sr_slot = NULL;
2592 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2595 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2597 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2599 if (!nfs4_sequence_done(task, &res->seq_res))
2601 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2603 update_changeattr(dir, &res->cinfo);
2604 nfs_post_op_update_inode(dir, res->dir_attr);
2608 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2610 struct nfs_server *server = NFS_SERVER(dir);
2611 struct nfs_renameargs *arg = msg->rpc_argp;
2612 struct nfs_renameres *res = msg->rpc_resp;
2614 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2615 arg->bitmask = server->attr_bitmask;
2616 res->server = server;
2619 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2620 struct inode *new_dir)
2622 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2624 if (!nfs4_sequence_done(task, &res->seq_res))
2626 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2629 update_changeattr(old_dir, &res->old_cinfo);
2630 nfs_post_op_update_inode(old_dir, res->old_fattr);
2631 update_changeattr(new_dir, &res->new_cinfo);
2632 nfs_post_op_update_inode(new_dir, res->new_fattr);
2636 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2637 struct inode *new_dir, struct qstr *new_name)
2639 struct nfs_server *server = NFS_SERVER(old_dir);
2640 struct nfs_renameargs arg = {
2641 .old_dir = NFS_FH(old_dir),
2642 .new_dir = NFS_FH(new_dir),
2643 .old_name = old_name,
2644 .new_name = new_name,
2645 .bitmask = server->attr_bitmask,
2647 struct nfs_renameres res = {
2650 struct rpc_message msg = {
2651 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2655 int status = -ENOMEM;
2657 res.old_fattr = nfs_alloc_fattr();
2658 res.new_fattr = nfs_alloc_fattr();
2659 if (res.old_fattr == NULL || res.new_fattr == NULL)
2662 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2664 update_changeattr(old_dir, &res.old_cinfo);
2665 nfs_post_op_update_inode(old_dir, res.old_fattr);
2666 update_changeattr(new_dir, &res.new_cinfo);
2667 nfs_post_op_update_inode(new_dir, res.new_fattr);
2670 nfs_free_fattr(res.new_fattr);
2671 nfs_free_fattr(res.old_fattr);
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 nfs4_exception exception = { };
2681 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2682 _nfs4_proc_rename(old_dir, old_name,
2685 } while (exception.retry);
2689 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2691 struct nfs_server *server = NFS_SERVER(inode);
2692 struct nfs4_link_arg arg = {
2693 .fh = NFS_FH(inode),
2694 .dir_fh = NFS_FH(dir),
2696 .bitmask = server->attr_bitmask,
2698 struct nfs4_link_res res = {
2701 struct rpc_message msg = {
2702 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2706 int status = -ENOMEM;
2708 res.fattr = nfs_alloc_fattr();
2709 res.dir_attr = nfs_alloc_fattr();
2710 if (res.fattr == NULL || res.dir_attr == NULL)
2713 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2715 update_changeattr(dir, &res.cinfo);
2716 nfs_post_op_update_inode(dir, res.dir_attr);
2717 nfs_post_op_update_inode(inode, res.fattr);
2720 nfs_free_fattr(res.dir_attr);
2721 nfs_free_fattr(res.fattr);
2725 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2727 struct nfs4_exception exception = { };
2730 err = nfs4_handle_exception(NFS_SERVER(inode),
2731 _nfs4_proc_link(inode, dir, name),
2733 } while (exception.retry);
2737 struct nfs4_createdata {
2738 struct rpc_message msg;
2739 struct nfs4_create_arg arg;
2740 struct nfs4_create_res res;
2742 struct nfs_fattr fattr;
2743 struct nfs_fattr dir_fattr;
2746 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2747 struct qstr *name, struct iattr *sattr, u32 ftype)
2749 struct nfs4_createdata *data;
2751 data = kzalloc(sizeof(*data), GFP_KERNEL);
2753 struct nfs_server *server = NFS_SERVER(dir);
2755 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2756 data->msg.rpc_argp = &data->arg;
2757 data->msg.rpc_resp = &data->res;
2758 data->arg.dir_fh = NFS_FH(dir);
2759 data->arg.server = server;
2760 data->arg.name = name;
2761 data->arg.attrs = sattr;
2762 data->arg.ftype = ftype;
2763 data->arg.bitmask = server->attr_bitmask;
2764 data->res.server = server;
2765 data->res.fh = &data->fh;
2766 data->res.fattr = &data->fattr;
2767 data->res.dir_fattr = &data->dir_fattr;
2768 nfs_fattr_init(data->res.fattr);
2769 nfs_fattr_init(data->res.dir_fattr);
2774 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2776 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2777 &data->arg, &data->res, 1);
2779 update_changeattr(dir, &data->res.dir_cinfo);
2780 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2781 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2786 static void nfs4_free_createdata(struct nfs4_createdata *data)
2791 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2792 struct page *page, unsigned int len, struct iattr *sattr)
2794 struct nfs4_createdata *data;
2795 int status = -ENAMETOOLONG;
2797 if (len > NFS4_MAXPATHLEN)
2801 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2805 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2806 data->arg.u.symlink.pages = &page;
2807 data->arg.u.symlink.len = len;
2809 status = nfs4_do_create(dir, dentry, data);
2811 nfs4_free_createdata(data);
2816 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2817 struct page *page, unsigned int len, struct iattr *sattr)
2819 struct nfs4_exception exception = { };
2822 err = nfs4_handle_exception(NFS_SERVER(dir),
2823 _nfs4_proc_symlink(dir, dentry, page,
2826 } while (exception.retry);
2830 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2831 struct iattr *sattr)
2833 struct nfs4_createdata *data;
2834 int status = -ENOMEM;
2836 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2840 status = nfs4_do_create(dir, dentry, data);
2842 nfs4_free_createdata(data);
2847 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2848 struct iattr *sattr)
2850 struct nfs4_exception exception = { };
2853 sattr->ia_mode &= ~current_umask();
2855 err = nfs4_handle_exception(NFS_SERVER(dir),
2856 _nfs4_proc_mkdir(dir, dentry, sattr),
2858 } while (exception.retry);
2862 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2863 u64 cookie, struct page **pages, unsigned int count, int plus)
2865 struct inode *dir = dentry->d_inode;
2866 struct nfs4_readdir_arg args = {
2871 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2874 struct nfs4_readdir_res res;
2875 struct rpc_message msg = {
2876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2883 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2884 dentry->d_parent->d_name.name,
2885 dentry->d_name.name,
2886 (unsigned long long)cookie);
2887 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2888 res.pgbase = args.pgbase;
2889 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2891 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2892 status += args.pgbase;
2895 nfs_invalidate_atime(dir);
2897 dprintk("%s: returns %d\n", __func__, status);
2901 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2902 u64 cookie, struct page **pages, unsigned int count, int plus)
2904 struct nfs4_exception exception = { };
2907 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2908 _nfs4_proc_readdir(dentry, cred, cookie,
2909 pages, count, plus),
2911 } while (exception.retry);
2915 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2916 struct iattr *sattr, dev_t rdev)
2918 struct nfs4_createdata *data;
2919 int mode = sattr->ia_mode;
2920 int status = -ENOMEM;
2922 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2923 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2925 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2930 data->arg.ftype = NF4FIFO;
2931 else if (S_ISBLK(mode)) {
2932 data->arg.ftype = NF4BLK;
2933 data->arg.u.device.specdata1 = MAJOR(rdev);
2934 data->arg.u.device.specdata2 = MINOR(rdev);
2936 else if (S_ISCHR(mode)) {
2937 data->arg.ftype = NF4CHR;
2938 data->arg.u.device.specdata1 = MAJOR(rdev);
2939 data->arg.u.device.specdata2 = MINOR(rdev);
2942 status = nfs4_do_create(dir, dentry, data);
2944 nfs4_free_createdata(data);
2949 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2950 struct iattr *sattr, dev_t rdev)
2952 struct nfs4_exception exception = { };
2955 sattr->ia_mode &= ~current_umask();
2957 err = nfs4_handle_exception(NFS_SERVER(dir),
2958 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2960 } while (exception.retry);
2964 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2965 struct nfs_fsstat *fsstat)
2967 struct nfs4_statfs_arg args = {
2969 .bitmask = server->attr_bitmask,
2971 struct nfs4_statfs_res res = {
2974 struct rpc_message msg = {
2975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2980 nfs_fattr_init(fsstat->fattr);
2981 return nfs4_call_sync(server, &msg, &args, &res, 0);
2984 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2986 struct nfs4_exception exception = { };
2989 err = nfs4_handle_exception(server,
2990 _nfs4_proc_statfs(server, fhandle, fsstat),
2992 } while (exception.retry);
2996 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2997 struct nfs_fsinfo *fsinfo)
2999 struct nfs4_fsinfo_arg args = {
3001 .bitmask = server->attr_bitmask,
3003 struct nfs4_fsinfo_res res = {
3006 struct rpc_message msg = {
3007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3012 return nfs4_call_sync(server, &msg, &args, &res, 0);
3015 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3017 struct nfs4_exception exception = { };
3021 err = nfs4_handle_exception(server,
3022 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3024 } while (exception.retry);
3028 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3030 nfs_fattr_init(fsinfo->fattr);
3031 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3034 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3035 struct nfs_pathconf *pathconf)
3037 struct nfs4_pathconf_arg args = {
3039 .bitmask = server->attr_bitmask,
3041 struct nfs4_pathconf_res res = {
3042 .pathconf = pathconf,
3044 struct rpc_message msg = {
3045 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3050 /* None of the pathconf attributes are mandatory to implement */
3051 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3052 memset(pathconf, 0, sizeof(*pathconf));
3056 nfs_fattr_init(pathconf->fattr);
3057 return nfs4_call_sync(server, &msg, &args, &res, 0);
3060 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3061 struct nfs_pathconf *pathconf)
3063 struct nfs4_exception exception = { };
3067 err = nfs4_handle_exception(server,
3068 _nfs4_proc_pathconf(server, fhandle, pathconf),
3070 } while (exception.retry);
3074 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3076 struct nfs_server *server = NFS_SERVER(data->inode);
3078 dprintk("--> %s\n", __func__);
3080 if (!nfs4_sequence_done(task, &data->res.seq_res))
3083 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3084 nfs_restart_rpc(task, server->nfs_client);
3088 nfs_invalidate_atime(data->inode);
3089 if (task->tk_status > 0)
3090 renew_lease(server, data->timestamp);
3094 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3096 data->timestamp = jiffies;
3097 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3100 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3102 struct inode *inode = data->inode;
3104 if (!nfs4_sequence_done(task, &data->res.seq_res))
3107 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3108 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3111 if (task->tk_status >= 0) {
3112 renew_lease(NFS_SERVER(inode), data->timestamp);
3113 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
3118 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3120 struct nfs_server *server = NFS_SERVER(data->inode);
3122 data->args.bitmask = server->cache_consistency_bitmask;
3123 data->res.server = server;
3124 data->timestamp = jiffies;
3126 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3129 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3131 struct inode *inode = data->inode;
3133 if (!nfs4_sequence_done(task, &data->res.seq_res))
3136 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3137 nfs_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3140 nfs_refresh_inode(inode, data->res.fattr);
3144 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3146 struct nfs_server *server = NFS_SERVER(data->inode);
3148 data->args.bitmask = server->cache_consistency_bitmask;
3149 data->res.server = server;
3150 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3153 struct nfs4_renewdata {
3154 struct nfs_client *client;
3155 unsigned long timestamp;
3159 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3160 * standalone procedure for queueing an asynchronous RENEW.
3162 static void nfs4_renew_release(void *calldata)
3164 struct nfs4_renewdata *data = calldata;
3165 struct nfs_client *clp = data->client;
3167 if (atomic_read(&clp->cl_count) > 1)
3168 nfs4_schedule_state_renewal(clp);
3169 nfs_put_client(clp);
3173 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3175 struct nfs4_renewdata *data = calldata;
3176 struct nfs_client *clp = data->client;
3177 unsigned long timestamp = data->timestamp;
3179 if (task->tk_status < 0) {
3180 /* Unless we're shutting down, schedule state recovery! */
3181 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3182 nfs4_schedule_state_recovery(clp);
3185 do_renew_lease(clp, timestamp);
3188 static const struct rpc_call_ops nfs4_renew_ops = {
3189 .rpc_call_done = nfs4_renew_done,
3190 .rpc_release = nfs4_renew_release,
3193 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3195 struct rpc_message msg = {
3196 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3200 struct nfs4_renewdata *data;
3202 if (!atomic_inc_not_zero(&clp->cl_count))
3204 data = kmalloc(sizeof(*data), GFP_KERNEL);
3208 data->timestamp = jiffies;
3209 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3210 &nfs4_renew_ops, data);
3213 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3215 struct rpc_message msg = {
3216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3220 unsigned long now = jiffies;
3223 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3226 do_renew_lease(clp, now);
3230 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3232 return (server->caps & NFS_CAP_ACLS)
3233 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3234 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3237 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3238 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3241 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3243 static void buf_to_pages(const void *buf, size_t buflen,
3244 struct page **pages, unsigned int *pgbase)
3246 const void *p = buf;
3248 *pgbase = offset_in_page(buf);
3250 while (p < buf + buflen) {
3251 *(pages++) = virt_to_page(p);
3252 p += PAGE_CACHE_SIZE;
3256 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3257 struct page **pages, unsigned int *pgbase)
3259 struct page *newpage, **spages;
3265 len = min(PAGE_CACHE_SIZE, buflen);
3266 newpage = alloc_page(GFP_KERNEL);
3268 if (newpage == NULL)
3270 memcpy(page_address(newpage), buf, len);
3275 } while (buflen != 0);
3281 __free_page(spages[rc-1]);
3285 struct nfs4_cached_acl {
3291 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3293 struct nfs_inode *nfsi = NFS_I(inode);
3295 spin_lock(&inode->i_lock);
3296 kfree(nfsi->nfs4_acl);
3297 nfsi->nfs4_acl = acl;
3298 spin_unlock(&inode->i_lock);
3301 static void nfs4_zap_acl_attr(struct inode *inode)
3303 nfs4_set_cached_acl(inode, NULL);
3306 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3308 struct nfs_inode *nfsi = NFS_I(inode);
3309 struct nfs4_cached_acl *acl;
3312 spin_lock(&inode->i_lock);
3313 acl = nfsi->nfs4_acl;
3316 if (buf == NULL) /* user is just asking for length */
3318 if (acl->cached == 0)
3320 ret = -ERANGE; /* see getxattr(2) man page */
3321 if (acl->len > buflen)
3323 memcpy(buf, acl->data, acl->len);
3327 spin_unlock(&inode->i_lock);
3331 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3333 struct nfs4_cached_acl *acl;
3335 if (buf && acl_len <= PAGE_SIZE) {
3336 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3340 memcpy(acl->data, buf, acl_len);
3342 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3349 nfs4_set_cached_acl(inode, acl);
3352 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3354 struct page *pages[NFS4ACL_MAXPAGES];
3355 struct nfs_getaclargs args = {
3356 .fh = NFS_FH(inode),
3360 struct nfs_getaclres res = {
3364 struct rpc_message msg = {
3365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3369 struct page *localpage = NULL;
3372 if (buflen < PAGE_SIZE) {
3373 /* As long as we're doing a round trip to the server anyway,
3374 * let's be prepared for a page of acl data. */
3375 localpage = alloc_page(GFP_KERNEL);
3376 resp_buf = page_address(localpage);
3377 if (localpage == NULL)
3379 args.acl_pages[0] = localpage;
3380 args.acl_pgbase = 0;
3381 args.acl_len = PAGE_SIZE;
3384 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3386 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3389 if (res.acl_len > args.acl_len)
3390 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3392 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3395 if (res.acl_len > buflen)
3398 memcpy(buf, resp_buf, res.acl_len);
3403 __free_page(localpage);
3407 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3409 struct nfs4_exception exception = { };
3412 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3415 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3416 } while (exception.retry);
3420 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3422 struct nfs_server *server = NFS_SERVER(inode);
3425 if (!nfs4_server_supports_acls(server))
3427 ret = nfs_revalidate_inode(server, inode);
3430 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3431 nfs_zap_acl_cache(inode);
3432 ret = nfs4_read_cached_acl(inode, buf, buflen);
3435 return nfs4_get_acl_uncached(inode, buf, buflen);
3438 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3440 struct nfs_server *server = NFS_SERVER(inode);
3441 struct page *pages[NFS4ACL_MAXPAGES];
3442 struct nfs_setaclargs arg = {
3443 .fh = NFS_FH(inode),
3447 struct nfs_setaclres res;
3448 struct rpc_message msg = {
3449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3455 if (!nfs4_server_supports_acls(server))
3457 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3460 nfs_inode_return_delegation(inode);
3461 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3464 * Free each page after tx, so the only ref left is
3465 * held by the network stack
3468 put_page(pages[i-1]);
3471 * Acl update can result in inode attribute update.
3472 * so mark the attribute cache invalid.
3474 spin_lock(&inode->i_lock);
3475 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3476 spin_unlock(&inode->i_lock);
3477 nfs_access_zap_cache(inode);
3478 nfs_zap_acl_cache(inode);
3482 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3484 struct nfs4_exception exception = { };
3487 err = nfs4_handle_exception(NFS_SERVER(inode),
3488 __nfs4_proc_set_acl(inode, buf, buflen),
3490 } while (exception.retry);
3495 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3497 struct nfs_client *clp = server->nfs_client;
3499 if (task->tk_status >= 0)
3501 switch(task->tk_status) {
3502 case -NFS4ERR_ADMIN_REVOKED:
3503 case -NFS4ERR_BAD_STATEID:
3504 case -NFS4ERR_OPENMODE:
3507 nfs4_state_mark_reclaim_nograce(clp, state);
3508 goto do_state_recovery;
3509 case -NFS4ERR_STALE_STATEID:
3510 case -NFS4ERR_STALE_CLIENTID:
3511 case -NFS4ERR_EXPIRED:
3512 goto do_state_recovery;
3513 #if defined(CONFIG_NFS_V4_1)
3514 case -NFS4ERR_BADSESSION:
3515 case -NFS4ERR_BADSLOT:
3516 case -NFS4ERR_BAD_HIGH_SLOT:
3517 case -NFS4ERR_DEADSESSION:
3518 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3519 case -NFS4ERR_SEQ_FALSE_RETRY:
3520 case -NFS4ERR_SEQ_MISORDERED:
3521 dprintk("%s ERROR %d, Reset session\n", __func__,
3523 nfs4_schedule_state_recovery(clp);
3524 task->tk_status = 0;
3526 #endif /* CONFIG_NFS_V4_1 */
3527 case -NFS4ERR_DELAY:
3528 nfs_inc_server_stats(server, NFSIOS_DELAY);
3529 case -NFS4ERR_GRACE:
3531 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3532 task->tk_status = 0;
3534 case -NFS4ERR_OLD_STATEID:
3535 task->tk_status = 0;
3538 task->tk_status = nfs4_map_errors(task->tk_status);
3541 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3542 nfs4_schedule_state_recovery(clp);
3543 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3544 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3545 task->tk_status = 0;
3549 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3550 unsigned short port, struct rpc_cred *cred,
3551 struct nfs4_setclientid_res *res)
3553 nfs4_verifier sc_verifier;
3554 struct nfs4_setclientid setclientid = {
3555 .sc_verifier = &sc_verifier,
3557 .sc_cb_ident = clp->cl_cb_ident,
3559 struct rpc_message msg = {
3560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3561 .rpc_argp = &setclientid,
3569 p = (__be32*)sc_verifier.data;
3570 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3571 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3574 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3575 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3577 rpc_peeraddr2str(clp->cl_rpcclient,
3579 rpc_peeraddr2str(clp->cl_rpcclient,
3581 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3582 clp->cl_id_uniquifier);
3583 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3584 sizeof(setclientid.sc_netid),
3585 rpc_peeraddr2str(clp->cl_rpcclient,
3586 RPC_DISPLAY_NETID));
3587 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3588 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3589 clp->cl_ipaddr, port >> 8, port & 255);
3591 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3592 if (status != -NFS4ERR_CLID_INUSE)
3597 ssleep(clp->cl_lease_time / HZ + 1);
3599 if (++clp->cl_id_uniquifier == 0)
3605 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3606 struct nfs4_setclientid_res *arg,
3607 struct rpc_cred *cred)
3609 struct nfs_fsinfo fsinfo;
3610 struct rpc_message msg = {
3611 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3613 .rpc_resp = &fsinfo,
3620 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3622 spin_lock(&clp->cl_lock);
3623 clp->cl_lease_time = fsinfo.lease_time * HZ;
3624 clp->cl_last_renewal = now;
3625 spin_unlock(&clp->cl_lock);
3630 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
3631 struct nfs4_setclientid_res *arg,
3632 struct rpc_cred *cred)
3637 err = _nfs4_proc_setclientid_confirm(clp, arg, cred);
3641 case -NFS4ERR_RESOURCE:
3642 /* The IBM lawyers misread another document! */
3643 case -NFS4ERR_DELAY:
3644 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3650 struct nfs4_delegreturndata {
3651 struct nfs4_delegreturnargs args;
3652 struct nfs4_delegreturnres res;
3654 nfs4_stateid stateid;
3655 unsigned long timestamp;
3656 struct nfs_fattr fattr;
3660 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3662 struct nfs4_delegreturndata *data = calldata;
3664 if (!nfs4_sequence_done(task, &data->res.seq_res))
3667 switch (task->tk_status) {
3668 case -NFS4ERR_STALE_STATEID:
3669 case -NFS4ERR_EXPIRED:
3671 renew_lease(data->res.server, data->timestamp);
3674 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
3676 nfs_restart_rpc(task, data->res.server->nfs_client);
3680 data->rpc_status = task->tk_status;
3683 static void nfs4_delegreturn_release(void *calldata)
3688 #if defined(CONFIG_NFS_V4_1)
3689 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3691 struct nfs4_delegreturndata *d_data;
3693 d_data = (struct nfs4_delegreturndata *)data;
3695 if (nfs4_setup_sequence(d_data->res.server,
3696 &d_data->args.seq_args,
3697 &d_data->res.seq_res, 1, task))
3699 rpc_call_start(task);
3701 #endif /* CONFIG_NFS_V4_1 */
3703 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3704 #if defined(CONFIG_NFS_V4_1)
3705 .rpc_call_prepare = nfs4_delegreturn_prepare,
3706 #endif /* CONFIG_NFS_V4_1 */
3707 .rpc_call_done = nfs4_delegreturn_done,
3708 .rpc_release = nfs4_delegreturn_release,
3711 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3713 struct nfs4_delegreturndata *data;
3714 struct nfs_server *server = NFS_SERVER(inode);
3715 struct rpc_task *task;
3716 struct rpc_message msg = {
3717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3720 struct rpc_task_setup task_setup_data = {
3721 .rpc_client = server->client,
3722 .rpc_message = &msg,
3723 .callback_ops = &nfs4_delegreturn_ops,
3724 .flags = RPC_TASK_ASYNC,
3728 data = kzalloc(sizeof(*data), GFP_NOFS);
3731 data->args.fhandle = &data->fh;
3732 data->args.stateid = &data->stateid;
3733 data->args.bitmask = server->attr_bitmask;
3734 nfs_copy_fh(&data->fh, NFS_FH(inode));
3735 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3736 data->res.fattr = &data->fattr;
3737 data->res.server = server;
3738 nfs_fattr_init(data->res.fattr);
3739 data->timestamp = jiffies;
3740 data->rpc_status = 0;
3742 task_setup_data.callback_data = data;
3743 msg.rpc_argp = &data->args;
3744 msg.rpc_resp = &data->res;
3745 task = rpc_run_task(&task_setup_data);
3747 return PTR_ERR(task);
3750 status = nfs4_wait_for_completion_rpc_task(task);
3753 status = data->rpc_status;
3756 nfs_refresh_inode(inode, &data->fattr);
3762 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3764 struct nfs_server *server = NFS_SERVER(inode);
3765 struct nfs4_exception exception = { };
3768 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3770 case -NFS4ERR_STALE_STATEID:
3771 case -NFS4ERR_EXPIRED:
3775 err = nfs4_handle_exception(server, err, &exception);
3776 } while (exception.retry);
3780 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3781 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3784 * sleep, with exponential backoff, and retry the LOCK operation.
3786 static unsigned long
3787 nfs4_set_lock_task_retry(unsigned long timeout)
3789 schedule_timeout_killable(timeout);
3791 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3792 return NFS4_LOCK_MAXTIMEOUT;
3796 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3798 struct inode *inode = state->inode;
3799 struct nfs_server *server = NFS_SERVER(inode);
3800 struct nfs_client *clp = server->nfs_client;
3801 struct nfs_lockt_args arg = {
3802 .fh = NFS_FH(inode),
3805 struct nfs_lockt_res res = {
3808 struct rpc_message msg = {
3809 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3812 .rpc_cred = state->owner->so_cred,
3814 struct nfs4_lock_state *lsp;
3817 arg.lock_owner.clientid = clp->cl_clientid;
3818 status = nfs4_set_lock_state(state, request);
3821 lsp = request->fl_u.nfs4_fl.owner;
3822 arg.lock_owner.id = lsp->ls_id.id;
3823 arg.lock_owner.s_dev = server->s_dev;
3824 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3827 request->fl_type = F_UNLCK;
3829 case -NFS4ERR_DENIED:
3832 request->fl_ops->fl_release_private(request);
3837 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3839 struct nfs4_exception exception = { };
3843 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3844 _nfs4_proc_getlk(state, cmd, request),
3846 } while (exception.retry);
3850 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3853 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3855 res = posix_lock_file_wait(file, fl);
3858 res = flock_lock_file_wait(file, fl);
3866 struct nfs4_unlockdata {
3867 struct nfs_locku_args arg;
3868 struct nfs_locku_res res;
3869 struct nfs4_lock_state *lsp;
3870 struct nfs_open_context *ctx;
3871 struct file_lock fl;
3872 const struct nfs_server *server;
3873 unsigned long timestamp;
3876 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3877 struct nfs_open_context *ctx,
3878 struct nfs4_lock_state *lsp,
3879 struct nfs_seqid *seqid)
3881 struct nfs4_unlockdata *p;
3882 struct inode *inode = lsp->ls_state->inode;
3884 p = kzalloc(sizeof(*p), GFP_NOFS);
3887 p->arg.fh = NFS_FH(inode);
3889 p->arg.seqid = seqid;
3890 p->res.seqid = seqid;
3891 p->arg.stateid = &lsp->ls_stateid;
3893 atomic_inc(&lsp->ls_count);
3894 /* Ensure we don't close file until we're done freeing locks! */
3895 p->ctx = get_nfs_open_context(ctx);
3896 memcpy(&p->fl, fl, sizeof(p->fl));
3897 p->server = NFS_SERVER(inode);
3901 static void nfs4_locku_release_calldata(void *data)
3903 struct nfs4_unlockdata *calldata = data;
3904 nfs_free_seqid(calldata->arg.seqid);
3905 nfs4_put_lock_state(calldata->lsp);
3906 put_nfs_open_context(calldata->ctx);
3910 static void nfs4_locku_done(struct rpc_task *task, void *data)
3912 struct nfs4_unlockdata *calldata = data;
3914 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3916 switch (task->tk_status) {
3918 memcpy(calldata->lsp->ls_stateid.data,
3919 calldata->res.stateid.data,
3920 sizeof(calldata->lsp->ls_stateid.data));
3921 renew_lease(calldata->server, calldata->timestamp);
3923 case -NFS4ERR_BAD_STATEID:
3924 case -NFS4ERR_OLD_STATEID:
3925 case -NFS4ERR_STALE_STATEID:
3926 case -NFS4ERR_EXPIRED:
3929 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3930 nfs_restart_rpc(task,
3931 calldata->server->nfs_client);
3935 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3937 struct nfs4_unlockdata *calldata = data;
3939 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3941 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3942 /* Note: exit _without_ running nfs4_locku_done */
3943 task->tk_action = NULL;
3946 calldata->timestamp = jiffies;
3947 if (nfs4_setup_sequence(calldata->server,
3948 &calldata->arg.seq_args,
3949 &calldata->res.seq_res, 1, task))
3951 rpc_call_start(task);
3954 static const struct rpc_call_ops nfs4_locku_ops = {
3955 .rpc_call_prepare = nfs4_locku_prepare,
3956 .rpc_call_done = nfs4_locku_done,
3957 .rpc_release = nfs4_locku_release_calldata,
3960 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3961 struct nfs_open_context *ctx,
3962 struct nfs4_lock_state *lsp,
3963 struct nfs_seqid *seqid)
3965 struct nfs4_unlockdata *data;
3966 struct rpc_message msg = {
3967 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3968 .rpc_cred = ctx->cred,
3970 struct rpc_task_setup task_setup_data = {
3971 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3972 .rpc_message = &msg,
3973 .callback_ops = &nfs4_locku_ops,
3974 .workqueue = nfsiod_workqueue,
3975 .flags = RPC_TASK_ASYNC,
3978 /* Ensure this is an unlock - when canceling a lock, the
3979 * canceled lock is passed in, and it won't be an unlock.
3981 fl->fl_type = F_UNLCK;
3983 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3985 nfs_free_seqid(seqid);
3986 return ERR_PTR(-ENOMEM);
3989 msg.rpc_argp = &data->arg;
3990 msg.rpc_resp = &data->res;
3991 task_setup_data.callback_data = data;
3992 return rpc_run_task(&task_setup_data);
3995 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3997 struct nfs_inode *nfsi = NFS_I(state->inode);
3998 struct nfs_seqid *seqid;
3999 struct nfs4_lock_state *lsp;
4000 struct rpc_task *task;
4002 unsigned char fl_flags = request->fl_flags;
4004 status = nfs4_set_lock_state(state, request);
4005 /* Unlock _before_ we do the RPC call */
4006 request->fl_flags |= FL_EXISTS;
4007 down_read(&nfsi->rwsem);
4008 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4009 up_read(&nfsi->rwsem);
4012 up_read(&nfsi->rwsem);
4015 /* Is this a delegated lock? */
4016 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4018 lsp = request->fl_u.nfs4_fl.owner;
4019 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4023 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4024 status = PTR_ERR(task);
4027 status = nfs4_wait_for_completion_rpc_task(task);
4030 request->fl_flags = fl_flags;
4034 struct nfs4_lockdata {
4035 struct nfs_lock_args arg;
4036 struct nfs_lock_res res;
4037 struct nfs4_lock_state *lsp;
4038 struct nfs_open_context *ctx;
4039 struct file_lock fl;
4040 unsigned long timestamp;
4043 struct nfs_server *server;
4046 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4047 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4050 struct nfs4_lockdata *p;
4051 struct inode *inode = lsp->ls_state->inode;
4052 struct nfs_server *server = NFS_SERVER(inode);
4054 p = kzalloc(sizeof(*p), gfp_mask);
4058 p->arg.fh = NFS_FH(inode);
4060 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4061 if (p->arg.open_seqid == NULL)
4063 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4064 if (p->arg.lock_seqid == NULL)
4065 goto out_free_seqid;
4066 p->arg.lock_stateid = &lsp->ls_stateid;
4067 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4068 p->arg.lock_owner.id = lsp->ls_id.id;
4069 p->arg.lock_owner.s_dev = server->s_dev;
4070 p->res.lock_seqid = p->arg.lock_seqid;
4073 atomic_inc(&lsp->ls_count);
4074 p->ctx = get_nfs_open_context(ctx);
4075 memcpy(&p->fl, fl, sizeof(p->fl));
4078 nfs_free_seqid(p->arg.open_seqid);
4084 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4086 struct nfs4_lockdata *data = calldata;
4087 struct nfs4_state *state = data->lsp->ls_state;
4089 dprintk("%s: begin!\n", __func__);
4090 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4092 /* Do we need to do an open_to_lock_owner? */
4093 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4094 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4096 data->arg.open_stateid = &state->stateid;
4097 data->arg.new_lock_owner = 1;
4098 data->res.open_seqid = data->arg.open_seqid;
4100 data->arg.new_lock_owner = 0;
4101 data->timestamp = jiffies;
4102 if (nfs4_setup_sequence(data->server,
4103 &data->arg.seq_args,
4104 &data->res.seq_res, 1, task))
4106 rpc_call_start(task);
4107 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4110 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4112 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4113 nfs4_lock_prepare(task, calldata);
4116 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4118 struct nfs4_lockdata *data = calldata;
4120 dprintk("%s: begin!\n", __func__);
4122 if (!nfs4_sequence_done(task, &data->res.seq_res))
4125 data->rpc_status = task->tk_status;
4126 if (data->arg.new_lock_owner != 0) {
4127 if (data->rpc_status == 0)
4128 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4132 if (data->rpc_status == 0) {
4133 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
4134 sizeof(data->lsp->ls_stateid.data));
4135 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4136 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
4139 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4142 static void nfs4_lock_release(void *calldata)
4144 struct nfs4_lockdata *data = calldata;
4146 dprintk("%s: begin!\n", __func__);
4147 nfs_free_seqid(data->arg.open_seqid);
4148 if (data->cancelled != 0) {
4149 struct rpc_task *task;
4150 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4151 data->arg.lock_seqid);
4154 dprintk("%s: cancelling lock!\n", __func__);
4156 nfs_free_seqid(data->arg.lock_seqid);
4157 nfs4_put_lock_state(data->lsp);
4158 put_nfs_open_context(data->ctx);
4160 dprintk("%s: done!\n", __func__);
4163 static const struct rpc_call_ops nfs4_lock_ops = {
4164 .rpc_call_prepare = nfs4_lock_prepare,
4165 .rpc_call_done = nfs4_lock_done,
4166 .rpc_release = nfs4_lock_release,
4169 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4170 .rpc_call_prepare = nfs4_recover_lock_prepare,
4171 .rpc_call_done = nfs4_lock_done,
4172 .rpc_release = nfs4_lock_release,
4175 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4177 struct nfs_client *clp = server->nfs_client;
4178 struct nfs4_state *state = lsp->ls_state;
4181 case -NFS4ERR_ADMIN_REVOKED:
4182 case -NFS4ERR_BAD_STATEID:
4183 case -NFS4ERR_EXPIRED:
4184 if (new_lock_owner != 0 ||
4185 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4186 nfs4_state_mark_reclaim_nograce(clp, state);
4187 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4189 case -NFS4ERR_STALE_STATEID:
4190 if (new_lock_owner != 0 ||
4191 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4192 nfs4_state_mark_reclaim_reboot(clp, state);
4193 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4197 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4199 struct nfs4_lockdata *data;
4200 struct rpc_task *task;
4201 struct rpc_message msg = {
4202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4203 .rpc_cred = state->owner->so_cred,
4205 struct rpc_task_setup task_setup_data = {
4206 .rpc_client = NFS_CLIENT(state->inode),
4207 .rpc_message = &msg,
4208 .callback_ops = &nfs4_lock_ops,
4209 .workqueue = nfsiod_workqueue,
4210 .flags = RPC_TASK_ASYNC,
4214 dprintk("%s: begin!\n", __func__);
4215 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4216 fl->fl_u.nfs4_fl.owner,
4217 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4221 data->arg.block = 1;
4222 if (recovery_type > NFS_LOCK_NEW) {
4223 if (recovery_type == NFS_LOCK_RECLAIM)
4224 data->arg.reclaim = NFS_LOCK_RECLAIM;
4225 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4227 msg.rpc_argp = &data->arg;
4228 msg.rpc_resp = &data->res;
4229 task_setup_data.callback_data = data;
4230 task = rpc_run_task(&task_setup_data);
4232 return PTR_ERR(task);
4233 ret = nfs4_wait_for_completion_rpc_task(task);
4235 ret = data->rpc_status;
4237 nfs4_handle_setlk_error(data->server, data->lsp,
4238 data->arg.new_lock_owner, ret);
4240 data->cancelled = 1;
4242 dprintk("%s: done, ret = %d!\n", __func__, ret);
4246 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4248 struct nfs_server *server = NFS_SERVER(state->inode);
4249 struct nfs4_exception exception = { };
4253 /* Cache the lock if possible... */
4254 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4256 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4257 if (err != -NFS4ERR_DELAY)
4259 nfs4_handle_exception(server, err, &exception);
4260 } while (exception.retry);
4264 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4266 struct nfs_server *server = NFS_SERVER(state->inode);
4267 struct nfs4_exception exception = { };
4270 err = nfs4_set_lock_state(state, request);
4274 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4276 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4280 case -NFS4ERR_GRACE:
4281 case -NFS4ERR_DELAY:
4282 nfs4_handle_exception(server, err, &exception);
4285 } while (exception.retry);
4290 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4292 struct nfs_inode *nfsi = NFS_I(state->inode);
4293 unsigned char fl_flags = request->fl_flags;
4294 int status = -ENOLCK;
4296 if ((fl_flags & FL_POSIX) &&
4297 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4299 /* Is this a delegated open? */
4300 status = nfs4_set_lock_state(state, request);
4303 request->fl_flags |= FL_ACCESS;
4304 status = do_vfs_lock(request->fl_file, request);
4307 down_read(&nfsi->rwsem);
4308 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4309 /* Yes: cache locks! */
4310 /* ...but avoid races with delegation recall... */
4311 request->fl_flags = fl_flags & ~FL_SLEEP;
4312 status = do_vfs_lock(request->fl_file, request);
4315 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4318 /* Note: we always want to sleep here! */
4319 request->fl_flags = fl_flags | FL_SLEEP;
4320 if (do_vfs_lock(request->fl_file, request) < 0)
4321 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4323 up_read(&nfsi->rwsem);
4325 request->fl_flags = fl_flags;
4329 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4331 struct nfs4_exception exception = { };
4335 err = _nfs4_proc_setlk(state, cmd, request);
4336 if (err == -NFS4ERR_DENIED)
4338 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4340 } while (exception.retry);
4345 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4347 struct nfs_open_context *ctx;
4348 struct nfs4_state *state;
4349 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4352 /* verify open state */
4353 ctx = nfs_file_open_context(filp);
4356 if (request->fl_start < 0 || request->fl_end < 0)
4359 if (IS_GETLK(cmd)) {
4361 return nfs4_proc_getlk(state, F_GETLK, request);
4365 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4368 if (request->fl_type == F_UNLCK) {
4370 return nfs4_proc_unlck(state, cmd, request);
4377 status = nfs4_proc_setlk(state, cmd, request);
4378 if ((status != -EAGAIN) || IS_SETLK(cmd))
4380 timeout = nfs4_set_lock_task_retry(timeout);
4381 status = -ERESTARTSYS;
4384 } while(status < 0);
4388 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4390 struct nfs_server *server = NFS_SERVER(state->inode);
4391 struct nfs4_exception exception = { };
4394 err = nfs4_set_lock_state(state, fl);
4398 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4401 printk(KERN_ERR "%s: unhandled error %d.\n",
4406 case -NFS4ERR_EXPIRED:
4407 case -NFS4ERR_STALE_CLIENTID:
4408 case -NFS4ERR_STALE_STATEID:
4409 case -NFS4ERR_BADSESSION:
4410 case -NFS4ERR_BADSLOT:
4411 case -NFS4ERR_BAD_HIGH_SLOT:
4412 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4413 case -NFS4ERR_DEADSESSION:
4414 nfs4_schedule_state_recovery(server->nfs_client);
4418 * The show must go on: exit, but mark the
4419 * stateid as needing recovery.
4421 case -NFS4ERR_ADMIN_REVOKED:
4422 case -NFS4ERR_BAD_STATEID:
4423 case -NFS4ERR_OPENMODE:
4424 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4429 * User RPCSEC_GSS context has expired.
4430 * We cannot recover this stateid now, so
4431 * skip it and allow recovery thread to
4437 case -NFS4ERR_DENIED:
4438 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4441 case -NFS4ERR_DELAY:
4444 err = nfs4_handle_exception(server, err, &exception);
4445 } while (exception.retry);
4450 static void nfs4_release_lockowner_release(void *calldata)
4455 const struct rpc_call_ops nfs4_release_lockowner_ops = {
4456 .rpc_release = nfs4_release_lockowner_release,
4459 void nfs4_release_lockowner(const struct nfs4_lock_state *lsp)
4461 struct nfs_server *server = lsp->ls_state->owner->so_server;
4462 struct nfs_release_lockowner_args *args;
4463 struct rpc_message msg = {
4464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4467 if (server->nfs_client->cl_mvops->minor_version != 0)
4469 args = kmalloc(sizeof(*args), GFP_NOFS);
4472 args->lock_owner.clientid = server->nfs_client->cl_clientid;
4473 args->lock_owner.id = lsp->ls_id.id;
4474 args->lock_owner.s_dev = server->s_dev;
4475 msg.rpc_argp = args;
4476 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, args);
4479 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4481 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4482 const void *buf, size_t buflen,
4483 int flags, int type)
4485 if (strcmp(key, "") != 0)
4488 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4491 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4492 void *buf, size_t buflen, int type)
4494 if (strcmp(key, "") != 0)
4497 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4500 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4501 size_t list_len, const char *name,
4502 size_t name_len, int type)
4504 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4506 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4509 if (list && len <= list_len)
4510 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4514 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4516 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4517 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4518 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4521 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4522 NFS_ATTR_FATTR_NLINK;
4523 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4527 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4528 struct nfs4_fs_locations *fs_locations, struct page *page)
4530 struct nfs_server *server = NFS_SERVER(dir);
4532 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4533 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4535 struct nfs4_fs_locations_arg args = {
4536 .dir_fh = NFS_FH(dir),
4541 struct nfs4_fs_locations_res res = {
4542 .fs_locations = fs_locations,
4544 struct rpc_message msg = {
4545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4551 dprintk("%s: start\n", __func__);
4552 nfs_fattr_init(&fs_locations->fattr);
4553 fs_locations->server = server;
4554 fs_locations->nlocations = 0;
4555 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4556 nfs_fixup_referral_attributes(&fs_locations->fattr);
4557 dprintk("%s: returned status = %d\n", __func__, status);
4561 #ifdef CONFIG_NFS_V4_1
4563 * Check the exchange flags returned by the server for invalid flags, having
4564 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
4567 static int nfs4_check_cl_exchange_flags(u32 flags)
4569 if (flags & ~EXCHGID4_FLAG_MASK_R)
4571 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
4572 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
4574 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
4578 return -NFS4ERR_INVAL;
4582 * nfs4_proc_exchange_id()
4584 * Since the clientid has expired, all compounds using sessions
4585 * associated with the stale clientid will be returning
4586 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4587 * be in some phase of session reset.
4589 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4591 nfs4_verifier verifier;
4592 struct nfs41_exchange_id_args args = {
4594 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
4596 struct nfs41_exchange_id_res res = {
4600 struct rpc_message msg = {
4601 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4608 dprintk("--> %s\n", __func__);
4609 BUG_ON(clp == NULL);
4611 p = (u32 *)verifier.data;
4612 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4613 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4614 args.verifier = &verifier;
4616 args.id_len = scnprintf(args.id, sizeof(args.id),
4619 init_utsname()->nodename,
4620 init_utsname()->domainname,
4621 clp->cl_rpcclient->cl_auth->au_flavor);
4623 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4625 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
4626 dprintk("<-- %s status= %d\n", __func__, status);
4630 struct nfs4_get_lease_time_data {
4631 struct nfs4_get_lease_time_args *args;
4632 struct nfs4_get_lease_time_res *res;
4633 struct nfs_client *clp;
4636 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4640 struct nfs4_get_lease_time_data *data =
4641 (struct nfs4_get_lease_time_data *)calldata;
4643 dprintk("--> %s\n", __func__);
4644 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4645 /* just setup sequence, do not trigger session recovery
4646 since we're invoked within one */
4647 ret = nfs41_setup_sequence(data->clp->cl_session,
4648 &data->args->la_seq_args,
4649 &data->res->lr_seq_res, 0, task);
4651 BUG_ON(ret == -EAGAIN);
4652 rpc_call_start(task);
4653 dprintk("<-- %s\n", __func__);
4657 * Called from nfs4_state_manager thread for session setup, so don't recover
4658 * from sequence operation or clientid errors.
4660 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4662 struct nfs4_get_lease_time_data *data =
4663 (struct nfs4_get_lease_time_data *)calldata;
4665 dprintk("--> %s\n", __func__);
4666 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
4668 switch (task->tk_status) {
4669 case -NFS4ERR_DELAY:
4670 case -NFS4ERR_GRACE:
4671 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4672 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4673 task->tk_status = 0;
4674 nfs_restart_rpc(task, data->clp);
4677 dprintk("<-- %s\n", __func__);
4680 struct rpc_call_ops nfs4_get_lease_time_ops = {
4681 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4682 .rpc_call_done = nfs4_get_lease_time_done,
4685 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4687 struct rpc_task *task;
4688 struct nfs4_get_lease_time_args args;
4689 struct nfs4_get_lease_time_res res = {
4690 .lr_fsinfo = fsinfo,
4692 struct nfs4_get_lease_time_data data = {
4697 struct rpc_message msg = {
4698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4702 struct rpc_task_setup task_setup = {
4703 .rpc_client = clp->cl_rpcclient,
4704 .rpc_message = &msg,
4705 .callback_ops = &nfs4_get_lease_time_ops,
4706 .callback_data = &data
4710 dprintk("--> %s\n", __func__);
4711 task = rpc_run_task(&task_setup);
4714 status = PTR_ERR(task);
4716 status = task->tk_status;
4719 dprintk("<-- %s return %d\n", __func__, status);
4725 * Reset a slot table
4727 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
4730 struct nfs4_slot *new = NULL;
4734 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
4735 max_reqs, tbl->max_slots);
4737 /* Does the newly negotiated max_reqs match the existing slot table? */
4738 if (max_reqs != tbl->max_slots) {
4740 new = kmalloc(max_reqs * sizeof(struct nfs4_slot),
4747 spin_lock(&tbl->slot_tbl_lock);
4750 tbl->max_slots = max_reqs;
4752 for (i = 0; i < tbl->max_slots; ++i)
4753 tbl->slots[i].seq_nr = ivalue;
4754 spin_unlock(&tbl->slot_tbl_lock);
4755 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4756 tbl, tbl->slots, tbl->max_slots);
4758 dprintk("<-- %s: return %d\n", __func__, ret);
4763 * Reset the forechannel and backchannel slot tables
4765 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4769 status = nfs4_reset_slot_table(&session->fc_slot_table,
4770 session->fc_attrs.max_reqs, 1);
4774 status = nfs4_reset_slot_table(&session->bc_slot_table,
4775 session->bc_attrs.max_reqs, 0);
4779 /* Destroy the slot table */
4780 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4782 if (session->fc_slot_table.slots != NULL) {
4783 kfree(session->fc_slot_table.slots);
4784 session->fc_slot_table.slots = NULL;
4786 if (session->bc_slot_table.slots != NULL) {
4787 kfree(session->bc_slot_table.slots);
4788 session->bc_slot_table.slots = NULL;
4794 * Initialize slot table
4796 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4797 int max_slots, int ivalue)
4799 struct nfs4_slot *slot;
4802 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4804 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4806 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_NOFS);
4811 spin_lock(&tbl->slot_tbl_lock);
4812 tbl->max_slots = max_slots;
4814 tbl->highest_used_slotid = -1; /* no slot is currently used */
4815 spin_unlock(&tbl->slot_tbl_lock);
4816 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4817 tbl, tbl->slots, tbl->max_slots);
4819 dprintk("<-- %s: return %d\n", __func__, ret);
4824 * Initialize the forechannel and backchannel tables
4826 static int nfs4_init_slot_tables(struct nfs4_session *session)
4828 struct nfs4_slot_table *tbl;
4831 tbl = &session->fc_slot_table;
4832 if (tbl->slots == NULL) {
4833 status = nfs4_init_slot_table(tbl,
4834 session->fc_attrs.max_reqs, 1);
4839 tbl = &session->bc_slot_table;
4840 if (tbl->slots == NULL) {
4841 status = nfs4_init_slot_table(tbl,
4842 session->bc_attrs.max_reqs, 0);
4844 nfs4_destroy_slot_tables(session);
4850 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4852 struct nfs4_session *session;
4853 struct nfs4_slot_table *tbl;
4855 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
4859 tbl = &session->fc_slot_table;
4860 tbl->highest_used_slotid = -1;
4861 spin_lock_init(&tbl->slot_tbl_lock);
4862 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4863 init_completion(&tbl->complete);
4865 tbl = &session->bc_slot_table;
4866 tbl->highest_used_slotid = -1;
4867 spin_lock_init(&tbl->slot_tbl_lock);
4868 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4869 init_completion(&tbl->complete);
4871 session->session_state = 1<<NFS4_SESSION_INITING;
4877 void nfs4_destroy_session(struct nfs4_session *session)
4879 nfs4_proc_destroy_session(session);
4880 dprintk("%s Destroy backchannel for xprt %p\n",
4881 __func__, session->clp->cl_rpcclient->cl_xprt);
4882 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4883 NFS41_BC_MIN_CALLBACKS);
4884 nfs4_destroy_slot_tables(session);
4889 * Initialize the values to be used by the client in CREATE_SESSION
4890 * If nfs4_init_session set the fore channel request and response sizes,
4893 * Set the back channel max_resp_sz_cached to zero to force the client to
4894 * always set csa_cachethis to FALSE because the current implementation
4895 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4897 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4899 struct nfs4_session *session = args->client->cl_session;
4900 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4901 mxresp_sz = session->fc_attrs.max_resp_sz;
4904 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4906 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4907 /* Fore channel attributes */
4908 args->fc_attrs.headerpadsz = 0;
4909 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4910 args->fc_attrs.max_resp_sz = mxresp_sz;
4911 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4912 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4914 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4915 "max_ops=%u max_reqs=%u\n",
4917 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4918 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
4920 /* Back channel attributes */
4921 args->bc_attrs.headerpadsz = 0;
4922 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4923 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4924 args->bc_attrs.max_resp_sz_cached = 0;
4925 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4926 args->bc_attrs.max_reqs = 1;
4928 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4929 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4931 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4932 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4933 args->bc_attrs.max_reqs);
4936 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
4938 struct nfs4_channel_attrs *sent = &args->fc_attrs;
4939 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
4941 if (rcvd->headerpadsz > sent->headerpadsz)
4943 if (rcvd->max_resp_sz > sent->max_resp_sz)
4946 * Our requested max_ops is the minimum we need; we're not
4947 * prepared to break up compounds into smaller pieces than that.
4948 * So, no point even trying to continue if the server won't
4951 if (rcvd->max_ops < sent->max_ops)
4953 if (rcvd->max_reqs == 0)
4958 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
4960 struct nfs4_channel_attrs *sent = &args->bc_attrs;
4961 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
4963 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
4965 if (rcvd->max_resp_sz < sent->max_resp_sz)
4967 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
4969 /* These would render the backchannel useless: */
4970 if (rcvd->max_ops == 0)
4972 if (rcvd->max_reqs == 0)
4977 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4978 struct nfs4_session *session)
4982 ret = nfs4_verify_fore_channel_attrs(args, session);
4985 return nfs4_verify_back_channel_attrs(args, session);
4988 static int _nfs4_proc_create_session(struct nfs_client *clp)
4990 struct nfs4_session *session = clp->cl_session;
4991 struct nfs41_create_session_args args = {
4993 .cb_program = NFS4_CALLBACK,
4995 struct nfs41_create_session_res res = {
4998 struct rpc_message msg = {
4999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5005 nfs4_init_channel_attrs(&args);
5006 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5008 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5011 /* Verify the session's negotiated channel_attrs values */
5012 status = nfs4_verify_channel_attrs(&args, session);
5014 /* Increment the clientid slot sequence id */
5022 * Issues a CREATE_SESSION operation to the server.
5023 * It is the responsibility of the caller to verify the session is
5024 * expired before calling this routine.
5026 int nfs4_proc_create_session(struct nfs_client *clp)
5030 struct nfs4_session *session = clp->cl_session;
5032 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5034 status = _nfs4_proc_create_session(clp);
5038 /* Init and reset the fore channel */
5039 status = nfs4_init_slot_tables(session);
5040 dprintk("slot table initialization returned %d\n", status);
5043 status = nfs4_reset_slot_tables(session);
5044 dprintk("slot table reset returned %d\n", status);
5048 ptr = (unsigned *)&session->sess_id.data[0];
5049 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5050 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5052 dprintk("<-- %s\n", __func__);
5057 * Issue the over-the-wire RPC DESTROY_SESSION.
5058 * The caller must serialize access to this routine.
5060 int nfs4_proc_destroy_session(struct nfs4_session *session)
5063 struct rpc_message msg;
5065 dprintk("--> nfs4_proc_destroy_session\n");
5067 /* session is still being setup */
5068 if (session->clp->cl_cons_state != NFS_CS_READY)
5071 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5072 msg.rpc_argp = session;
5073 msg.rpc_resp = NULL;
5074 msg.rpc_cred = NULL;
5075 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
5079 "Got error %d from the server on DESTROY_SESSION. "
5080 "Session has been destroyed regardless...\n", status);
5082 dprintk("<-- nfs4_proc_destroy_session\n");
5086 int nfs4_init_session(struct nfs_server *server)
5088 struct nfs_client *clp = server->nfs_client;
5089 struct nfs4_session *session;
5090 unsigned int rsize, wsize;
5093 if (!nfs4_has_session(clp))
5096 session = clp->cl_session;
5097 if (!test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state))
5100 rsize = server->rsize;
5102 rsize = NFS_MAX_FILE_IO_SIZE;
5103 wsize = server->wsize;
5105 wsize = NFS_MAX_FILE_IO_SIZE;
5107 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5108 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5110 ret = nfs4_recover_expired_lease(server);
5112 ret = nfs4_check_client_ready(clp);
5117 * Renew the cl_session lease.
5119 struct nfs4_sequence_data {
5120 struct nfs_client *clp;
5121 struct nfs4_sequence_args args;
5122 struct nfs4_sequence_res res;
5125 static void nfs41_sequence_release(void *data)
5127 struct nfs4_sequence_data *calldata = data;
5128 struct nfs_client *clp = calldata->clp;
5130 if (atomic_read(&clp->cl_count) > 1)
5131 nfs4_schedule_state_renewal(clp);
5132 nfs_put_client(clp);
5136 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5138 switch(task->tk_status) {
5139 case -NFS4ERR_DELAY:
5140 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5143 nfs4_schedule_state_recovery(clp);
5148 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5150 struct nfs4_sequence_data *calldata = data;
5151 struct nfs_client *clp = calldata->clp;
5153 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5156 if (task->tk_status < 0) {
5157 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5158 if (atomic_read(&clp->cl_count) == 1)
5161 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5162 rpc_restart_call_prepare(task);
5166 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5168 dprintk("<-- %s\n", __func__);
5171 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5173 struct nfs4_sequence_data *calldata = data;
5174 struct nfs_client *clp = calldata->clp;
5175 struct nfs4_sequence_args *args;
5176 struct nfs4_sequence_res *res;
5178 args = task->tk_msg.rpc_argp;
5179 res = task->tk_msg.rpc_resp;
5181 if (nfs41_setup_sequence(clp->cl_session, args, res, 0, task))
5183 rpc_call_start(task);
5186 static const struct rpc_call_ops nfs41_sequence_ops = {
5187 .rpc_call_done = nfs41_sequence_call_done,
5188 .rpc_call_prepare = nfs41_sequence_prepare,
5189 .rpc_release = nfs41_sequence_release,
5192 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5194 struct nfs4_sequence_data *calldata;
5195 struct rpc_message msg = {
5196 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5199 struct rpc_task_setup task_setup_data = {
5200 .rpc_client = clp->cl_rpcclient,
5201 .rpc_message = &msg,
5202 .callback_ops = &nfs41_sequence_ops,
5203 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5206 if (!atomic_inc_not_zero(&clp->cl_count))
5207 return ERR_PTR(-EIO);
5208 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5209 if (calldata == NULL) {
5210 nfs_put_client(clp);
5211 return ERR_PTR(-ENOMEM);
5213 msg.rpc_argp = &calldata->args;
5214 msg.rpc_resp = &calldata->res;
5215 calldata->clp = clp;
5216 task_setup_data.callback_data = calldata;
5218 return rpc_run_task(&task_setup_data);
5221 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5223 struct rpc_task *task;
5226 task = _nfs41_proc_sequence(clp, cred);
5228 ret = PTR_ERR(task);
5231 dprintk("<-- %s status=%d\n", __func__, ret);
5235 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5237 struct rpc_task *task;
5240 task = _nfs41_proc_sequence(clp, cred);
5242 ret = PTR_ERR(task);
5245 ret = rpc_wait_for_completion_task(task);
5247 ret = task->tk_status;
5250 dprintk("<-- %s status=%d\n", __func__, ret);
5254 struct nfs4_reclaim_complete_data {
5255 struct nfs_client *clp;
5256 struct nfs41_reclaim_complete_args arg;
5257 struct nfs41_reclaim_complete_res res;
5260 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5262 struct nfs4_reclaim_complete_data *calldata = data;
5264 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5265 if (nfs41_setup_sequence(calldata->clp->cl_session,
5266 &calldata->arg.seq_args,
5267 &calldata->res.seq_res, 0, task))
5270 rpc_call_start(task);
5273 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5275 switch(task->tk_status) {
5277 case -NFS4ERR_COMPLETE_ALREADY:
5278 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5280 case -NFS4ERR_DELAY:
5281 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5284 nfs4_schedule_state_recovery(clp);
5289 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5291 struct nfs4_reclaim_complete_data *calldata = data;
5292 struct nfs_client *clp = calldata->clp;
5293 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5295 dprintk("--> %s\n", __func__);
5296 if (!nfs41_sequence_done(task, res))
5299 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5300 rpc_restart_call_prepare(task);
5303 dprintk("<-- %s\n", __func__);
5306 static void nfs4_free_reclaim_complete_data(void *data)
5308 struct nfs4_reclaim_complete_data *calldata = data;
5313 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5314 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5315 .rpc_call_done = nfs4_reclaim_complete_done,
5316 .rpc_release = nfs4_free_reclaim_complete_data,
5320 * Issue a global reclaim complete.
5322 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5324 struct nfs4_reclaim_complete_data *calldata;
5325 struct rpc_task *task;
5326 struct rpc_message msg = {
5327 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5329 struct rpc_task_setup task_setup_data = {
5330 .rpc_client = clp->cl_rpcclient,
5331 .rpc_message = &msg,
5332 .callback_ops = &nfs4_reclaim_complete_call_ops,
5333 .flags = RPC_TASK_ASYNC,
5335 int status = -ENOMEM;
5337 dprintk("--> %s\n", __func__);
5338 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5339 if (calldata == NULL)
5341 calldata->clp = clp;
5342 calldata->arg.one_fs = 0;
5344 msg.rpc_argp = &calldata->arg;
5345 msg.rpc_resp = &calldata->res;
5346 task_setup_data.callback_data = calldata;
5347 task = rpc_run_task(&task_setup_data);
5349 status = PTR_ERR(task);
5355 dprintk("<-- %s status=%d\n", __func__, status);
5360 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5362 struct nfs4_layoutget *lgp = calldata;
5363 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5365 dprintk("--> %s\n", __func__);
5366 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5367 * right now covering the LAYOUTGET we are about to send.
5368 * However, that is not so catastrophic, and there seems
5369 * to be no way to prevent it completely.
5371 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
5372 &lgp->res.seq_res, 0, task))
5374 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5375 NFS_I(lgp->args.inode)->layout,
5376 lgp->args.ctx->state)) {
5377 rpc_exit(task, NFS4_OK);
5380 rpc_call_start(task);
5383 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5385 struct nfs4_layoutget *lgp = calldata;
5386 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5388 dprintk("--> %s\n", __func__);
5390 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
5393 switch (task->tk_status) {
5396 case -NFS4ERR_LAYOUTTRYLATER:
5397 case -NFS4ERR_RECALLCONFLICT:
5398 task->tk_status = -NFS4ERR_DELAY;
5401 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
5402 rpc_restart_call_prepare(task);
5406 dprintk("<-- %s\n", __func__);
5409 static void nfs4_layoutget_release(void *calldata)
5411 struct nfs4_layoutget *lgp = calldata;
5413 dprintk("--> %s\n", __func__);
5414 if (lgp->res.layout.buf != NULL)
5415 free_page((unsigned long) lgp->res.layout.buf);
5416 put_nfs_open_context(lgp->args.ctx);
5418 dprintk("<-- %s\n", __func__);
5421 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
5422 .rpc_call_prepare = nfs4_layoutget_prepare,
5423 .rpc_call_done = nfs4_layoutget_done,
5424 .rpc_release = nfs4_layoutget_release,
5427 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
5429 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
5430 struct rpc_task *task;
5431 struct rpc_message msg = {
5432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
5433 .rpc_argp = &lgp->args,
5434 .rpc_resp = &lgp->res,
5436 struct rpc_task_setup task_setup_data = {
5437 .rpc_client = server->client,
5438 .rpc_message = &msg,
5439 .callback_ops = &nfs4_layoutget_call_ops,
5440 .callback_data = lgp,
5441 .flags = RPC_TASK_ASYNC,
5445 dprintk("--> %s\n", __func__);
5447 lgp->res.layout.buf = (void *)__get_free_page(GFP_NOFS);
5448 if (lgp->res.layout.buf == NULL) {
5449 nfs4_layoutget_release(lgp);
5453 lgp->res.seq_res.sr_slot = NULL;
5454 task = rpc_run_task(&task_setup_data);
5456 return PTR_ERR(task);
5457 status = nfs4_wait_for_completion_rpc_task(task);
5459 status = task->tk_status;
5461 status = pnfs_layout_process(lgp);
5463 dprintk("<-- %s status=%d\n", __func__, status);
5468 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5470 struct nfs4_getdeviceinfo_args args = {
5473 struct nfs4_getdeviceinfo_res res = {
5476 struct rpc_message msg = {
5477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
5483 dprintk("--> %s\n", __func__);
5484 status = nfs4_call_sync(server, &msg, &args, &res, 0);
5485 dprintk("<-- %s status=%d\n", __func__, status);
5490 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
5492 struct nfs4_exception exception = { };
5496 err = nfs4_handle_exception(server,
5497 _nfs4_proc_getdeviceinfo(server, pdev),
5499 } while (exception.retry);
5502 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
5504 #endif /* CONFIG_NFS_V4_1 */
5506 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
5507 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5508 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5509 .recover_open = nfs4_open_reclaim,
5510 .recover_lock = nfs4_lock_reclaim,
5511 .establish_clid = nfs4_init_clientid,
5512 .get_clid_cred = nfs4_get_setclientid_cred,
5515 #if defined(CONFIG_NFS_V4_1)
5516 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
5517 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
5518 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
5519 .recover_open = nfs4_open_reclaim,
5520 .recover_lock = nfs4_lock_reclaim,
5521 .establish_clid = nfs41_init_clientid,
5522 .get_clid_cred = nfs4_get_exchange_id_cred,
5523 .reclaim_complete = nfs41_proc_reclaim_complete,
5525 #endif /* CONFIG_NFS_V4_1 */
5527 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
5528 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5529 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5530 .recover_open = nfs4_open_expired,
5531 .recover_lock = nfs4_lock_expired,
5532 .establish_clid = nfs4_init_clientid,
5533 .get_clid_cred = nfs4_get_setclientid_cred,
5536 #if defined(CONFIG_NFS_V4_1)
5537 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
5538 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
5539 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
5540 .recover_open = nfs4_open_expired,
5541 .recover_lock = nfs4_lock_expired,
5542 .establish_clid = nfs41_init_clientid,
5543 .get_clid_cred = nfs4_get_exchange_id_cred,
5545 #endif /* CONFIG_NFS_V4_1 */
5547 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
5548 .sched_state_renewal = nfs4_proc_async_renew,
5549 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
5550 .renew_lease = nfs4_proc_renew,
5553 #if defined(CONFIG_NFS_V4_1)
5554 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
5555 .sched_state_renewal = nfs41_proc_async_sequence,
5556 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
5557 .renew_lease = nfs4_proc_sequence,
5561 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
5563 .call_sync = _nfs4_call_sync,
5564 .validate_stateid = nfs4_validate_delegation_stateid,
5565 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
5566 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
5567 .state_renewal_ops = &nfs40_state_renewal_ops,
5570 #if defined(CONFIG_NFS_V4_1)
5571 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
5573 .call_sync = _nfs4_call_sync_session,
5574 .validate_stateid = nfs41_validate_delegation_stateid,
5575 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
5576 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
5577 .state_renewal_ops = &nfs41_state_renewal_ops,
5581 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
5582 [0] = &nfs_v4_0_minor_ops,
5583 #if defined(CONFIG_NFS_V4_1)
5584 [1] = &nfs_v4_1_minor_ops,
5588 static const struct inode_operations nfs4_file_inode_operations = {
5589 .permission = nfs_permission,
5590 .getattr = nfs_getattr,
5591 .setattr = nfs_setattr,
5592 .getxattr = generic_getxattr,
5593 .setxattr = generic_setxattr,
5594 .listxattr = generic_listxattr,
5595 .removexattr = generic_removexattr,
5598 const struct nfs_rpc_ops nfs_v4_clientops = {
5599 .version = 4, /* protocol version */
5600 .dentry_ops = &nfs4_dentry_operations,
5601 .dir_inode_ops = &nfs4_dir_inode_operations,
5602 .file_inode_ops = &nfs4_file_inode_operations,
5603 .getroot = nfs4_proc_get_root,
5604 .getattr = nfs4_proc_getattr,
5605 .setattr = nfs4_proc_setattr,
5606 .lookupfh = nfs4_proc_lookupfh,
5607 .lookup = nfs4_proc_lookup,
5608 .access = nfs4_proc_access,
5609 .readlink = nfs4_proc_readlink,
5610 .create = nfs4_proc_create,
5611 .remove = nfs4_proc_remove,
5612 .unlink_setup = nfs4_proc_unlink_setup,
5613 .unlink_done = nfs4_proc_unlink_done,
5614 .rename = nfs4_proc_rename,
5615 .rename_setup = nfs4_proc_rename_setup,
5616 .rename_done = nfs4_proc_rename_done,
5617 .link = nfs4_proc_link,
5618 .symlink = nfs4_proc_symlink,
5619 .mkdir = nfs4_proc_mkdir,
5620 .rmdir = nfs4_proc_remove,
5621 .readdir = nfs4_proc_readdir,
5622 .mknod = nfs4_proc_mknod,
5623 .statfs = nfs4_proc_statfs,
5624 .fsinfo = nfs4_proc_fsinfo,
5625 .pathconf = nfs4_proc_pathconf,
5626 .set_capabilities = nfs4_server_capabilities,
5627 .decode_dirent = nfs4_decode_dirent,
5628 .read_setup = nfs4_proc_read_setup,
5629 .read_done = nfs4_read_done,
5630 .write_setup = nfs4_proc_write_setup,
5631 .write_done = nfs4_write_done,
5632 .commit_setup = nfs4_proc_commit_setup,
5633 .commit_done = nfs4_commit_done,
5634 .lock = nfs4_proc_lock,
5635 .clear_acl_cache = nfs4_zap_acl_attr,
5636 .close_context = nfs4_close_context,
5637 .open_context = nfs4_atomic_open,
5640 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
5641 .prefix = XATTR_NAME_NFSV4_ACL,
5642 .list = nfs4_xattr_list_nfs4_acl,
5643 .get = nfs4_xattr_get_nfs4_acl,
5644 .set = nfs4_xattr_set_nfs4_acl,
5647 const struct xattr_handler *nfs4_xattr_handlers[] = {
5648 &nfs4_xattr_nfs4_acl_handler,