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/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.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/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
51 #include <linux/module.h>
54 #include "delegation.h"
59 #define NFSDBG_FACILITY NFSDBG_PROC
61 #define NFS4_POLL_RETRY_MIN (HZ/10)
62 #define NFS4_POLL_RETRY_MAX (15*HZ)
65 static int _nfs4_proc_open(struct nfs4_opendata *data);
66 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
67 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
68 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
71 /* Prevent leaks of NFSv4 errors into userland */
72 static int nfs4_map_errors(int err)
75 dprintk("%s could not handle NFSv4 error %d\n",
83 * This is our standard bitmap for GETATTR requests.
85 const u32 nfs4_fattr_bitmap[2] = {
90 | FATTR4_WORD0_FILEID,
92 | FATTR4_WORD1_NUMLINKS
94 | FATTR4_WORD1_OWNER_GROUP
96 | FATTR4_WORD1_SPACE_USED
97 | FATTR4_WORD1_TIME_ACCESS
98 | FATTR4_WORD1_TIME_METADATA
99 | FATTR4_WORD1_TIME_MODIFY
102 const u32 nfs4_statfs_bitmap[2] = {
103 FATTR4_WORD0_FILES_AVAIL
104 | FATTR4_WORD0_FILES_FREE
105 | FATTR4_WORD0_FILES_TOTAL,
106 FATTR4_WORD1_SPACE_AVAIL
107 | FATTR4_WORD1_SPACE_FREE
108 | FATTR4_WORD1_SPACE_TOTAL
111 const u32 nfs4_pathconf_bitmap[2] = {
113 | FATTR4_WORD0_MAXNAME,
117 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
118 | FATTR4_WORD0_MAXREAD
119 | FATTR4_WORD0_MAXWRITE
120 | FATTR4_WORD0_LEASE_TIME,
124 const u32 nfs4_fs_locations_bitmap[2] = {
126 | FATTR4_WORD0_CHANGE
129 | FATTR4_WORD0_FILEID
130 | FATTR4_WORD0_FS_LOCATIONS,
132 | FATTR4_WORD1_NUMLINKS
134 | FATTR4_WORD1_OWNER_GROUP
135 | FATTR4_WORD1_RAWDEV
136 | FATTR4_WORD1_SPACE_USED
137 | FATTR4_WORD1_TIME_ACCESS
138 | FATTR4_WORD1_TIME_METADATA
139 | FATTR4_WORD1_TIME_MODIFY
140 | FATTR4_WORD1_MOUNTED_ON_FILEID
143 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
144 struct nfs4_readdir_arg *readdir)
148 BUG_ON(readdir->count < 80);
150 readdir->cookie = cookie;
151 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
156 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
161 * NFSv4 servers do not return entries for '.' and '..'
162 * Therefore, we fake these entries here. We let '.'
163 * have cookie 0 and '..' have cookie 1. Note that
164 * when talking to the server, we always send cookie 0
167 start = p = kmap_atomic(*readdir->pages, KM_USER0);
170 *p++ = xdr_one; /* next */
171 *p++ = xdr_zero; /* cookie, first word */
172 *p++ = xdr_one; /* cookie, second word */
173 *p++ = xdr_one; /* entry len */
174 memcpy(p, ".\0\0\0", 4); /* entry */
176 *p++ = xdr_one; /* bitmap length */
177 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
178 *p++ = htonl(8); /* attribute buffer length */
179 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
182 *p++ = xdr_one; /* next */
183 *p++ = xdr_zero; /* cookie, first word */
184 *p++ = xdr_two; /* cookie, second word */
185 *p++ = xdr_two; /* entry len */
186 memcpy(p, "..\0\0", 4); /* entry */
188 *p++ = xdr_one; /* bitmap length */
189 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
190 *p++ = htonl(8); /* attribute buffer length */
191 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
193 readdir->pgbase = (char *)p - (char *)start;
194 readdir->count -= readdir->pgbase;
195 kunmap_atomic(start, KM_USER0);
198 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
204 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
205 nfs_wait_bit_killable, TASK_KILLABLE);
209 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
216 *timeout = NFS4_POLL_RETRY_MIN;
217 if (*timeout > NFS4_POLL_RETRY_MAX)
218 *timeout = NFS4_POLL_RETRY_MAX;
219 schedule_timeout_killable(*timeout);
220 if (fatal_signal_pending(current))
226 /* This is the error handling routine for processes that are allowed
229 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
231 struct nfs_client *clp = server->nfs_client;
232 struct nfs4_state *state = exception->state;
235 exception->retry = 0;
239 case -NFS4ERR_ADMIN_REVOKED:
240 case -NFS4ERR_BAD_STATEID:
241 case -NFS4ERR_OPENMODE:
244 nfs4_state_mark_reclaim_nograce(clp, state);
245 case -NFS4ERR_STALE_CLIENTID:
246 case -NFS4ERR_STALE_STATEID:
247 case -NFS4ERR_EXPIRED:
248 nfs4_schedule_state_recovery(clp);
249 ret = nfs4_wait_clnt_recover(clp);
251 exception->retry = 1;
252 #if !defined(CONFIG_NFS_V4_1)
254 #else /* !defined(CONFIG_NFS_V4_1) */
255 if (!nfs4_has_session(server->nfs_client))
258 case -NFS4ERR_BADSESSION:
259 case -NFS4ERR_BADSLOT:
260 case -NFS4ERR_BAD_HIGH_SLOT:
261 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
262 case -NFS4ERR_DEADSESSION:
263 case -NFS4ERR_SEQ_FALSE_RETRY:
264 case -NFS4ERR_SEQ_MISORDERED:
265 dprintk("%s ERROR: %d Reset session\n", __func__,
267 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
268 exception->retry = 1;
270 #endif /* !defined(CONFIG_NFS_V4_1) */
271 case -NFS4ERR_FILE_OPEN:
274 ret = nfs4_delay(server->client, &exception->timeout);
277 case -NFS4ERR_OLD_STATEID:
278 exception->retry = 1;
280 /* We failed to handle the error */
281 return nfs4_map_errors(ret);
285 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
287 struct nfs_client *clp = server->nfs_client;
288 spin_lock(&clp->cl_lock);
289 if (time_before(clp->cl_last_renewal,timestamp))
290 clp->cl_last_renewal = timestamp;
291 spin_unlock(&clp->cl_lock);
294 #if defined(CONFIG_NFS_V4_1)
297 * nfs4_free_slot - free a slot and efficiently update slot table.
299 * freeing a slot is trivially done by clearing its respective bit
301 * If the freed slotid equals highest_used_slotid we want to update it
302 * so that the server would be able to size down the slot table if needed,
303 * otherwise we know that the highest_used_slotid is still in use.
304 * When updating highest_used_slotid there may be "holes" in the bitmap
305 * so we need to scan down from highest_used_slotid to 0 looking for the now
306 * highest slotid in use.
307 * If none found, highest_used_slotid is set to -1.
310 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
312 int slotid = free_slotid;
314 spin_lock(&tbl->slot_tbl_lock);
315 /* clear used bit in bitmap */
316 __clear_bit(slotid, tbl->used_slots);
318 /* update highest_used_slotid when it is freed */
319 if (slotid == tbl->highest_used_slotid) {
320 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
321 if (slotid >= 0 && slotid < tbl->max_slots)
322 tbl->highest_used_slotid = slotid;
324 tbl->highest_used_slotid = -1;
326 rpc_wake_up_next(&tbl->slot_tbl_waitq);
327 spin_unlock(&tbl->slot_tbl_lock);
328 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
329 free_slotid, tbl->highest_used_slotid);
332 void nfs41_sequence_free_slot(const struct nfs_client *clp,
333 struct nfs4_sequence_res *res)
335 struct nfs4_slot_table *tbl;
337 if (!nfs4_has_session(clp)) {
338 dprintk("%s: No session\n", __func__);
341 tbl = &clp->cl_session->fc_slot_table;
342 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
343 dprintk("%s: No slot\n", __func__);
344 /* just wake up the next guy waiting since
345 * we may have not consumed a slot after all */
346 rpc_wake_up_next(&tbl->slot_tbl_waitq);
349 nfs4_free_slot(tbl, res->sr_slotid);
350 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
353 static void nfs41_sequence_done(struct nfs_client *clp,
354 struct nfs4_sequence_res *res,
357 unsigned long timestamp;
358 struct nfs4_slot_table *tbl;
359 struct nfs4_slot *slot;
362 * sr_status remains 1 if an RPC level error occurred. The server
363 * may or may not have processed the sequence operation..
364 * Proceed as if the server received and processed the sequence
367 if (res->sr_status == 1)
368 res->sr_status = NFS_OK;
370 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
371 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
374 tbl = &clp->cl_session->fc_slot_table;
375 slot = tbl->slots + res->sr_slotid;
377 if (res->sr_status == 0) {
378 /* Update the slot's sequence and clientid lease timer */
380 timestamp = res->sr_renewal_time;
381 spin_lock(&clp->cl_lock);
382 if (time_before(clp->cl_last_renewal, timestamp))
383 clp->cl_last_renewal = timestamp;
384 spin_unlock(&clp->cl_lock);
388 /* The session may be reset by one of the error handlers. */
389 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
390 nfs41_sequence_free_slot(clp, res);
394 * nfs4_find_slot - efficiently look for a free slot
396 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
397 * If found, we mark the slot as used, update the highest_used_slotid,
398 * and respectively set up the sequence operation args.
399 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
401 * Note: must be called with under the slot_tbl_lock.
404 nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
407 u8 ret_id = NFS4_MAX_SLOT_TABLE;
408 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
410 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
411 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
413 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
414 if (slotid >= tbl->max_slots)
416 __set_bit(slotid, tbl->used_slots);
417 if (slotid > tbl->highest_used_slotid)
418 tbl->highest_used_slotid = slotid;
421 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
422 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
426 static int nfs4_recover_session(struct nfs4_session *session)
428 struct nfs_client *clp = session->clp;
432 ret = nfs4_wait_clnt_recover(clp);
435 if (!test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
437 nfs4_schedule_state_manager(clp);
442 static int nfs41_setup_sequence(struct nfs4_session *session,
443 struct nfs4_sequence_args *args,
444 struct nfs4_sequence_res *res,
446 struct rpc_task *task)
448 struct nfs4_slot *slot;
449 struct nfs4_slot_table *tbl;
453 dprintk("--> %s\n", __func__);
454 /* slot already allocated? */
455 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
458 memset(res, 0, sizeof(*res));
459 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
460 tbl = &session->fc_slot_table;
462 spin_lock(&tbl->slot_tbl_lock);
463 if (test_bit(NFS4CLNT_SESSION_SETUP, &session->clp->cl_state)) {
464 if (tbl->highest_used_slotid != -1) {
465 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
466 spin_unlock(&tbl->slot_tbl_lock);
467 dprintk("<-- %s: Session reset: draining\n", __func__);
471 /* The slot table is empty; start the reset thread */
472 dprintk("%s Session Reset\n", __func__);
473 spin_unlock(&tbl->slot_tbl_lock);
474 status = nfs4_recover_session(session);
477 spin_lock(&tbl->slot_tbl_lock);
480 slotid = nfs4_find_slot(tbl, task);
481 if (slotid == NFS4_MAX_SLOT_TABLE) {
482 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
483 spin_unlock(&tbl->slot_tbl_lock);
484 dprintk("<-- %s: no free slots\n", __func__);
487 spin_unlock(&tbl->slot_tbl_lock);
489 slot = tbl->slots + slotid;
490 args->sa_session = session;
491 args->sa_slotid = slotid;
492 args->sa_cache_this = cache_reply;
494 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
496 res->sr_session = session;
497 res->sr_slotid = slotid;
498 res->sr_renewal_time = jiffies;
500 * sr_status is only set in decode_sequence, and so will remain
501 * set to 1 if an rpc level failure occurs.
507 int nfs4_setup_sequence(struct nfs_client *clp,
508 struct nfs4_sequence_args *args,
509 struct nfs4_sequence_res *res,
511 struct rpc_task *task)
515 dprintk("--> %s clp %p session %p sr_slotid %d\n",
516 __func__, clp, clp->cl_session, res->sr_slotid);
518 if (!nfs4_has_session(clp))
520 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
522 if (ret != -EAGAIN) {
523 /* terminate rpc task */
524 task->tk_status = ret;
525 task->tk_action = NULL;
528 dprintk("<-- %s status=%d\n", __func__, ret);
532 struct nfs41_call_sync_data {
533 struct nfs_client *clp;
534 struct nfs4_sequence_args *seq_args;
535 struct nfs4_sequence_res *seq_res;
539 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
541 struct nfs41_call_sync_data *data = calldata;
543 dprintk("--> %s data->clp->cl_session %p\n", __func__,
544 data->clp->cl_session);
545 if (nfs4_setup_sequence(data->clp, data->seq_args,
546 data->seq_res, data->cache_reply, task))
548 rpc_call_start(task);
551 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
553 struct nfs41_call_sync_data *data = calldata;
555 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
556 nfs41_sequence_free_slot(data->clp, data->seq_res);
559 struct rpc_call_ops nfs41_call_sync_ops = {
560 .rpc_call_prepare = nfs41_call_sync_prepare,
561 .rpc_call_done = nfs41_call_sync_done,
564 static int nfs4_call_sync_sequence(struct nfs_client *clp,
565 struct rpc_clnt *clnt,
566 struct rpc_message *msg,
567 struct nfs4_sequence_args *args,
568 struct nfs4_sequence_res *res,
572 struct rpc_task *task;
573 struct nfs41_call_sync_data data = {
577 .cache_reply = cache_reply,
579 struct rpc_task_setup task_setup = {
582 .callback_ops = &nfs41_call_sync_ops,
583 .callback_data = &data
586 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
587 task = rpc_run_task(&task_setup);
591 ret = task->tk_status;
597 int _nfs4_call_sync_session(struct nfs_server *server,
598 struct rpc_message *msg,
599 struct nfs4_sequence_args *args,
600 struct nfs4_sequence_res *res,
603 return nfs4_call_sync_sequence(server->nfs_client, server->client,
604 msg, args, res, cache_reply);
607 #endif /* CONFIG_NFS_V4_1 */
609 int _nfs4_call_sync(struct nfs_server *server,
610 struct rpc_message *msg,
611 struct nfs4_sequence_args *args,
612 struct nfs4_sequence_res *res,
615 args->sa_session = res->sr_session = NULL;
616 return rpc_call_sync(server->client, msg, 0);
619 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
620 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
621 &(res)->seq_res, (cache_reply))
623 static void nfs4_sequence_done(const struct nfs_server *server,
624 struct nfs4_sequence_res *res, int rpc_status)
626 #ifdef CONFIG_NFS_V4_1
627 if (nfs4_has_session(server->nfs_client))
628 nfs41_sequence_done(server->nfs_client, res, rpc_status);
629 #endif /* CONFIG_NFS_V4_1 */
632 /* no restart, therefore free slot here */
633 static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
634 struct nfs4_sequence_res *res,
637 nfs4_sequence_done(server, res, rpc_status);
638 nfs4_sequence_free_slot(server->nfs_client, res);
641 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
643 struct nfs_inode *nfsi = NFS_I(dir);
645 spin_lock(&dir->i_lock);
646 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
647 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
648 nfs_force_lookup_revalidate(dir);
649 nfsi->change_attr = cinfo->after;
650 spin_unlock(&dir->i_lock);
653 struct nfs4_opendata {
655 struct nfs_openargs o_arg;
656 struct nfs_openres o_res;
657 struct nfs_open_confirmargs c_arg;
658 struct nfs_open_confirmres c_res;
659 struct nfs_fattr f_attr;
660 struct nfs_fattr dir_attr;
663 struct nfs4_state_owner *owner;
664 struct nfs4_state *state;
666 unsigned long timestamp;
667 unsigned int rpc_done : 1;
673 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
675 p->o_res.f_attr = &p->f_attr;
676 p->o_res.dir_attr = &p->dir_attr;
677 p->o_res.seqid = p->o_arg.seqid;
678 p->c_res.seqid = p->c_arg.seqid;
679 p->o_res.server = p->o_arg.server;
680 nfs_fattr_init(&p->f_attr);
681 nfs_fattr_init(&p->dir_attr);
684 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
685 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
686 const struct iattr *attrs)
688 struct dentry *parent = dget_parent(path->dentry);
689 struct inode *dir = parent->d_inode;
690 struct nfs_server *server = NFS_SERVER(dir);
691 struct nfs4_opendata *p;
693 p = kzalloc(sizeof(*p), GFP_KERNEL);
696 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
697 if (p->o_arg.seqid == NULL)
699 p->path.mnt = mntget(path->mnt);
700 p->path.dentry = dget(path->dentry);
703 atomic_inc(&sp->so_count);
704 p->o_arg.fh = NFS_FH(dir);
705 p->o_arg.open_flags = flags;
706 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
707 p->o_arg.clientid = server->nfs_client->cl_clientid;
708 p->o_arg.id = sp->so_owner_id.id;
709 p->o_arg.name = &p->path.dentry->d_name;
710 p->o_arg.server = server;
711 p->o_arg.bitmask = server->attr_bitmask;
712 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
713 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
714 if (flags & O_EXCL) {
715 u32 *s = (u32 *) p->o_arg.u.verifier.data;
718 } else if (flags & O_CREAT) {
719 p->o_arg.u.attrs = &p->attrs;
720 memcpy(&p->attrs, attrs, sizeof(p->attrs));
722 p->c_arg.fh = &p->o_res.fh;
723 p->c_arg.stateid = &p->o_res.stateid;
724 p->c_arg.seqid = p->o_arg.seqid;
725 nfs4_init_opendata_res(p);
735 static void nfs4_opendata_free(struct kref *kref)
737 struct nfs4_opendata *p = container_of(kref,
738 struct nfs4_opendata, kref);
740 nfs_free_seqid(p->o_arg.seqid);
741 if (p->state != NULL)
742 nfs4_put_open_state(p->state);
743 nfs4_put_state_owner(p->owner);
749 static void nfs4_opendata_put(struct nfs4_opendata *p)
752 kref_put(&p->kref, nfs4_opendata_free);
755 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
759 ret = rpc_wait_for_completion_task(task);
763 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
767 if (open_mode & O_EXCL)
769 switch (mode & (FMODE_READ|FMODE_WRITE)) {
771 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
774 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
776 case FMODE_READ|FMODE_WRITE:
777 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
783 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
785 if ((delegation->type & fmode) != fmode)
787 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
789 nfs_mark_delegation_referenced(delegation);
793 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
802 case FMODE_READ|FMODE_WRITE:
805 nfs4_state_set_mode_locked(state, state->state | fmode);
808 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
810 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
811 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
812 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
815 set_bit(NFS_O_RDONLY_STATE, &state->flags);
818 set_bit(NFS_O_WRONLY_STATE, &state->flags);
820 case FMODE_READ|FMODE_WRITE:
821 set_bit(NFS_O_RDWR_STATE, &state->flags);
825 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
827 write_seqlock(&state->seqlock);
828 nfs_set_open_stateid_locked(state, stateid, fmode);
829 write_sequnlock(&state->seqlock);
832 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
835 * Protect the call to nfs4_state_set_mode_locked and
836 * serialise the stateid update
838 write_seqlock(&state->seqlock);
839 if (deleg_stateid != NULL) {
840 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
841 set_bit(NFS_DELEGATED_STATE, &state->flags);
843 if (open_stateid != NULL)
844 nfs_set_open_stateid_locked(state, open_stateid, fmode);
845 write_sequnlock(&state->seqlock);
846 spin_lock(&state->owner->so_lock);
847 update_open_stateflags(state, fmode);
848 spin_unlock(&state->owner->so_lock);
851 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
853 struct nfs_inode *nfsi = NFS_I(state->inode);
854 struct nfs_delegation *deleg_cur;
857 fmode &= (FMODE_READ|FMODE_WRITE);
860 deleg_cur = rcu_dereference(nfsi->delegation);
861 if (deleg_cur == NULL)
864 spin_lock(&deleg_cur->lock);
865 if (nfsi->delegation != deleg_cur ||
866 (deleg_cur->type & fmode) != fmode)
867 goto no_delegation_unlock;
869 if (delegation == NULL)
870 delegation = &deleg_cur->stateid;
871 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
872 goto no_delegation_unlock;
874 nfs_mark_delegation_referenced(deleg_cur);
875 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
877 no_delegation_unlock:
878 spin_unlock(&deleg_cur->lock);
882 if (!ret && open_stateid != NULL) {
883 __update_open_stateid(state, open_stateid, NULL, fmode);
891 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
893 struct nfs_delegation *delegation;
896 delegation = rcu_dereference(NFS_I(inode)->delegation);
897 if (delegation == NULL || (delegation->type & fmode) == fmode) {
902 nfs_inode_return_delegation(inode);
905 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
907 struct nfs4_state *state = opendata->state;
908 struct nfs_inode *nfsi = NFS_I(state->inode);
909 struct nfs_delegation *delegation;
910 int open_mode = opendata->o_arg.open_flags & O_EXCL;
911 fmode_t fmode = opendata->o_arg.fmode;
912 nfs4_stateid stateid;
916 if (can_open_cached(state, fmode, open_mode)) {
917 spin_lock(&state->owner->so_lock);
918 if (can_open_cached(state, fmode, open_mode)) {
919 update_open_stateflags(state, fmode);
920 spin_unlock(&state->owner->so_lock);
921 goto out_return_state;
923 spin_unlock(&state->owner->so_lock);
926 delegation = rcu_dereference(nfsi->delegation);
927 if (delegation == NULL ||
928 !can_open_delegated(delegation, fmode)) {
932 /* Save the delegation */
933 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
935 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
940 /* Try to update the stateid using the delegation */
941 if (update_open_stateid(state, NULL, &stateid, fmode))
942 goto out_return_state;
947 atomic_inc(&state->count);
951 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
954 struct nfs4_state *state = NULL;
955 struct nfs_delegation *delegation;
958 if (!data->rpc_done) {
959 state = nfs4_try_open_cached(data);
964 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
966 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
967 ret = PTR_ERR(inode);
971 state = nfs4_get_open_state(inode, data->owner);
974 if (data->o_res.delegation_type != 0) {
975 int delegation_flags = 0;
978 delegation = rcu_dereference(NFS_I(inode)->delegation);
980 delegation_flags = delegation->flags;
982 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
983 nfs_inode_set_delegation(state->inode,
984 data->owner->so_cred,
987 nfs_inode_reclaim_delegation(state->inode,
988 data->owner->so_cred,
992 update_open_stateid(state, &data->o_res.stateid, NULL,
1000 return ERR_PTR(ret);
1003 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1005 struct nfs_inode *nfsi = NFS_I(state->inode);
1006 struct nfs_open_context *ctx;
1008 spin_lock(&state->inode->i_lock);
1009 list_for_each_entry(ctx, &nfsi->open_files, list) {
1010 if (ctx->state != state)
1012 get_nfs_open_context(ctx);
1013 spin_unlock(&state->inode->i_lock);
1016 spin_unlock(&state->inode->i_lock);
1017 return ERR_PTR(-ENOENT);
1020 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1022 struct nfs4_opendata *opendata;
1024 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
1025 if (opendata == NULL)
1026 return ERR_PTR(-ENOMEM);
1027 opendata->state = state;
1028 atomic_inc(&state->count);
1032 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1034 struct nfs4_state *newstate;
1037 opendata->o_arg.open_flags = 0;
1038 opendata->o_arg.fmode = fmode;
1039 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1040 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1041 nfs4_init_opendata_res(opendata);
1042 ret = _nfs4_proc_open(opendata);
1045 newstate = nfs4_opendata_to_nfs4_state(opendata);
1046 if (IS_ERR(newstate))
1047 return PTR_ERR(newstate);
1048 nfs4_close_state(&opendata->path, newstate, fmode);
1053 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1055 struct nfs4_state *newstate;
1058 /* memory barrier prior to reading state->n_* */
1059 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1061 if (state->n_rdwr != 0) {
1062 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1065 if (newstate != state)
1068 if (state->n_wronly != 0) {
1069 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1072 if (newstate != state)
1075 if (state->n_rdonly != 0) {
1076 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1079 if (newstate != state)
1083 * We may have performed cached opens for all three recoveries.
1084 * Check if we need to update the current stateid.
1086 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1087 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1088 write_seqlock(&state->seqlock);
1089 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1090 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1091 write_sequnlock(&state->seqlock);
1098 * reclaim state on the server after a reboot.
1100 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1102 struct nfs_delegation *delegation;
1103 struct nfs4_opendata *opendata;
1104 fmode_t delegation_type = 0;
1107 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1108 if (IS_ERR(opendata))
1109 return PTR_ERR(opendata);
1110 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1111 opendata->o_arg.fh = NFS_FH(state->inode);
1113 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1114 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1115 delegation_type = delegation->type;
1117 opendata->o_arg.u.delegation_type = delegation_type;
1118 status = nfs4_open_recover(opendata, state);
1119 nfs4_opendata_put(opendata);
1123 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1125 struct nfs_server *server = NFS_SERVER(state->inode);
1126 struct nfs4_exception exception = { };
1129 err = _nfs4_do_open_reclaim(ctx, state);
1130 if (err != -NFS4ERR_DELAY)
1132 nfs4_handle_exception(server, err, &exception);
1133 } while (exception.retry);
1137 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1139 struct nfs_open_context *ctx;
1142 ctx = nfs4_state_find_open_context(state);
1144 return PTR_ERR(ctx);
1145 ret = nfs4_do_open_reclaim(ctx, state);
1146 put_nfs_open_context(ctx);
1150 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1152 struct nfs4_opendata *opendata;
1155 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1156 if (IS_ERR(opendata))
1157 return PTR_ERR(opendata);
1158 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1159 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1160 sizeof(opendata->o_arg.u.delegation.data));
1161 ret = nfs4_open_recover(opendata, state);
1162 nfs4_opendata_put(opendata);
1166 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1168 struct nfs4_exception exception = { };
1169 struct nfs_server *server = NFS_SERVER(state->inode);
1172 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1176 case -NFS4ERR_STALE_CLIENTID:
1177 case -NFS4ERR_STALE_STATEID:
1178 case -NFS4ERR_EXPIRED:
1179 /* Don't recall a delegation if it was lost */
1180 nfs4_schedule_state_recovery(server->nfs_client);
1183 err = nfs4_handle_exception(server, err, &exception);
1184 } while (exception.retry);
1188 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1190 struct nfs4_opendata *data = calldata;
1192 data->rpc_status = task->tk_status;
1193 if (RPC_ASSASSINATED(task))
1195 if (data->rpc_status == 0) {
1196 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1197 sizeof(data->o_res.stateid.data));
1198 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1199 renew_lease(data->o_res.server, data->timestamp);
1204 static void nfs4_open_confirm_release(void *calldata)
1206 struct nfs4_opendata *data = calldata;
1207 struct nfs4_state *state = NULL;
1209 /* If this request hasn't been cancelled, do nothing */
1210 if (data->cancelled == 0)
1212 /* In case of error, no cleanup! */
1213 if (!data->rpc_done)
1215 state = nfs4_opendata_to_nfs4_state(data);
1217 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1219 nfs4_opendata_put(data);
1222 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1223 .rpc_call_done = nfs4_open_confirm_done,
1224 .rpc_release = nfs4_open_confirm_release,
1228 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1230 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1232 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1233 struct rpc_task *task;
1234 struct rpc_message msg = {
1235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1236 .rpc_argp = &data->c_arg,
1237 .rpc_resp = &data->c_res,
1238 .rpc_cred = data->owner->so_cred,
1240 struct rpc_task_setup task_setup_data = {
1241 .rpc_client = server->client,
1242 .rpc_message = &msg,
1243 .callback_ops = &nfs4_open_confirm_ops,
1244 .callback_data = data,
1245 .workqueue = nfsiod_workqueue,
1246 .flags = RPC_TASK_ASYNC,
1250 kref_get(&data->kref);
1252 data->rpc_status = 0;
1253 data->timestamp = jiffies;
1254 task = rpc_run_task(&task_setup_data);
1256 return PTR_ERR(task);
1257 status = nfs4_wait_for_completion_rpc_task(task);
1259 data->cancelled = 1;
1262 status = data->rpc_status;
1267 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1269 struct nfs4_opendata *data = calldata;
1270 struct nfs4_state_owner *sp = data->owner;
1272 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1275 * Check if we still need to send an OPEN call, or if we can use
1276 * a delegation instead.
1278 if (data->state != NULL) {
1279 struct nfs_delegation *delegation;
1281 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1284 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1285 if (delegation != NULL &&
1286 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1292 /* Update sequence id. */
1293 data->o_arg.id = sp->so_owner_id.id;
1294 data->o_arg.clientid = sp->so_client->cl_clientid;
1295 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1296 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1297 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1299 data->timestamp = jiffies;
1300 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1301 &data->o_arg.seq_args,
1302 &data->o_res.seq_res, 1, task))
1304 rpc_call_start(task);
1307 task->tk_action = NULL;
1311 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1313 struct nfs4_opendata *data = calldata;
1315 data->rpc_status = task->tk_status;
1317 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1320 if (RPC_ASSASSINATED(task))
1322 if (task->tk_status == 0) {
1323 switch (data->o_res.f_attr->mode & S_IFMT) {
1327 data->rpc_status = -ELOOP;
1330 data->rpc_status = -EISDIR;
1333 data->rpc_status = -ENOTDIR;
1335 renew_lease(data->o_res.server, data->timestamp);
1336 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1337 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1342 static void nfs4_open_release(void *calldata)
1344 struct nfs4_opendata *data = calldata;
1345 struct nfs4_state *state = NULL;
1347 /* If this request hasn't been cancelled, do nothing */
1348 if (data->cancelled == 0)
1350 /* In case of error, no cleanup! */
1351 if (data->rpc_status != 0 || !data->rpc_done)
1353 /* In case we need an open_confirm, no cleanup! */
1354 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1356 state = nfs4_opendata_to_nfs4_state(data);
1358 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1360 nfs4_opendata_put(data);
1363 static const struct rpc_call_ops nfs4_open_ops = {
1364 .rpc_call_prepare = nfs4_open_prepare,
1365 .rpc_call_done = nfs4_open_done,
1366 .rpc_release = nfs4_open_release,
1370 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1372 static int _nfs4_proc_open(struct nfs4_opendata *data)
1374 struct inode *dir = data->dir->d_inode;
1375 struct nfs_server *server = NFS_SERVER(dir);
1376 struct nfs_openargs *o_arg = &data->o_arg;
1377 struct nfs_openres *o_res = &data->o_res;
1378 struct rpc_task *task;
1379 struct rpc_message msg = {
1380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1383 .rpc_cred = data->owner->so_cred,
1385 struct rpc_task_setup task_setup_data = {
1386 .rpc_client = server->client,
1387 .rpc_message = &msg,
1388 .callback_ops = &nfs4_open_ops,
1389 .callback_data = data,
1390 .workqueue = nfsiod_workqueue,
1391 .flags = RPC_TASK_ASYNC,
1395 kref_get(&data->kref);
1397 data->rpc_status = 0;
1398 data->cancelled = 0;
1399 task = rpc_run_task(&task_setup_data);
1401 return PTR_ERR(task);
1402 status = nfs4_wait_for_completion_rpc_task(task);
1404 data->cancelled = 1;
1407 status = data->rpc_status;
1409 if (status != 0 || !data->rpc_done)
1412 if (o_res->fh.size == 0)
1413 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1415 if (o_arg->open_flags & O_CREAT) {
1416 update_changeattr(dir, &o_res->cinfo);
1417 nfs_post_op_update_inode(dir, o_res->dir_attr);
1419 nfs_refresh_inode(dir, o_res->dir_attr);
1420 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1421 status = _nfs4_proc_open_confirm(data);
1425 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1426 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1430 static int nfs4_recover_expired_lease(struct nfs_server *server)
1432 struct nfs_client *clp = server->nfs_client;
1436 ret = nfs4_wait_clnt_recover(clp);
1439 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1440 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1442 nfs4_schedule_state_recovery(clp);
1449 * reclaim state on the server after a network partition.
1450 * Assumes caller holds the appropriate lock
1452 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1454 struct nfs4_opendata *opendata;
1457 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1458 if (IS_ERR(opendata))
1459 return PTR_ERR(opendata);
1460 ret = nfs4_open_recover(opendata, state);
1462 d_drop(ctx->path.dentry);
1463 nfs4_opendata_put(opendata);
1467 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1469 struct nfs_server *server = NFS_SERVER(state->inode);
1470 struct nfs4_exception exception = { };
1474 err = _nfs4_open_expired(ctx, state);
1475 if (err != -NFS4ERR_DELAY)
1477 nfs4_handle_exception(server, err, &exception);
1478 } while (exception.retry);
1482 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1484 struct nfs_open_context *ctx;
1487 ctx = nfs4_state_find_open_context(state);
1489 return PTR_ERR(ctx);
1490 ret = nfs4_do_open_expired(ctx, state);
1491 put_nfs_open_context(ctx);
1496 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1497 * fields corresponding to attributes that were used to store the verifier.
1498 * Make sure we clobber those fields in the later setattr call
1500 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1502 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1503 !(sattr->ia_valid & ATTR_ATIME_SET))
1504 sattr->ia_valid |= ATTR_ATIME;
1506 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1507 !(sattr->ia_valid & ATTR_MTIME_SET))
1508 sattr->ia_valid |= ATTR_MTIME;
1512 * Returns a referenced nfs4_state
1514 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)
1516 struct nfs4_state_owner *sp;
1517 struct nfs4_state *state = NULL;
1518 struct nfs_server *server = NFS_SERVER(dir);
1519 struct nfs4_opendata *opendata;
1522 /* Protect against reboot recovery conflicts */
1524 if (!(sp = nfs4_get_state_owner(server, cred))) {
1525 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1528 status = nfs4_recover_expired_lease(server);
1530 goto err_put_state_owner;
1531 if (path->dentry->d_inode != NULL)
1532 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1534 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1535 if (opendata == NULL)
1536 goto err_put_state_owner;
1538 if (path->dentry->d_inode != NULL)
1539 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1541 status = _nfs4_proc_open(opendata);
1543 goto err_opendata_put;
1545 if (opendata->o_arg.open_flags & O_EXCL)
1546 nfs4_exclusive_attrset(opendata, sattr);
1548 state = nfs4_opendata_to_nfs4_state(opendata);
1549 status = PTR_ERR(state);
1551 goto err_opendata_put;
1552 nfs4_opendata_put(opendata);
1553 nfs4_put_state_owner(sp);
1557 nfs4_opendata_put(opendata);
1558 err_put_state_owner:
1559 nfs4_put_state_owner(sp);
1566 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)
1568 struct nfs4_exception exception = { };
1569 struct nfs4_state *res;
1573 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1576 /* NOTE: BAD_SEQID means the server and client disagree about the
1577 * book-keeping w.r.t. state-changing operations
1578 * (OPEN/CLOSE/LOCK/LOCKU...)
1579 * It is actually a sign of a bug on the client or on the server.
1581 * If we receive a BAD_SEQID error in the particular case of
1582 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1583 * have unhashed the old state_owner for us, and that we can
1584 * therefore safely retry using a new one. We should still warn
1585 * the user though...
1587 if (status == -NFS4ERR_BAD_SEQID) {
1588 printk(KERN_WARNING "NFS: v4 server %s "
1589 " returned a bad sequence-id error!\n",
1590 NFS_SERVER(dir)->nfs_client->cl_hostname);
1591 exception.retry = 1;
1595 * BAD_STATEID on OPEN means that the server cancelled our
1596 * state before it received the OPEN_CONFIRM.
1597 * Recover by retrying the request as per the discussion
1598 * on Page 181 of RFC3530.
1600 if (status == -NFS4ERR_BAD_STATEID) {
1601 exception.retry = 1;
1604 if (status == -EAGAIN) {
1605 /* We must have found a delegation */
1606 exception.retry = 1;
1609 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1610 status, &exception));
1611 } while (exception.retry);
1615 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1616 struct nfs_fattr *fattr, struct iattr *sattr,
1617 struct nfs4_state *state)
1619 struct nfs_server *server = NFS_SERVER(inode);
1620 struct nfs_setattrargs arg = {
1621 .fh = NFS_FH(inode),
1624 .bitmask = server->attr_bitmask,
1626 struct nfs_setattrres res = {
1630 struct rpc_message msg = {
1631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1636 unsigned long timestamp = jiffies;
1639 nfs_fattr_init(fattr);
1641 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1642 /* Use that stateid */
1643 } else if (state != NULL) {
1644 nfs4_copy_stateid(&arg.stateid, state, current->files);
1646 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1648 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1649 if (status == 0 && state != NULL)
1650 renew_lease(server, timestamp);
1654 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1655 struct nfs_fattr *fattr, struct iattr *sattr,
1656 struct nfs4_state *state)
1658 struct nfs_server *server = NFS_SERVER(inode);
1659 struct nfs4_exception exception = { };
1662 err = nfs4_handle_exception(server,
1663 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1665 } while (exception.retry);
1669 struct nfs4_closedata {
1671 struct inode *inode;
1672 struct nfs4_state *state;
1673 struct nfs_closeargs arg;
1674 struct nfs_closeres res;
1675 struct nfs_fattr fattr;
1676 unsigned long timestamp;
1679 static void nfs4_free_closedata(void *data)
1681 struct nfs4_closedata *calldata = data;
1682 struct nfs4_state_owner *sp = calldata->state->owner;
1684 nfs4_put_open_state(calldata->state);
1685 nfs_free_seqid(calldata->arg.seqid);
1686 nfs4_put_state_owner(sp);
1687 path_put(&calldata->path);
1691 static void nfs4_close_done(struct rpc_task *task, void *data)
1693 struct nfs4_closedata *calldata = data;
1694 struct nfs4_state *state = calldata->state;
1695 struct nfs_server *server = NFS_SERVER(calldata->inode);
1697 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
1698 if (RPC_ASSASSINATED(task))
1700 /* hmm. we are done with the inode, and in the process of freeing
1701 * the state_owner. we keep this around to process errors
1703 switch (task->tk_status) {
1705 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1706 renew_lease(server, calldata->timestamp);
1708 case -NFS4ERR_STALE_STATEID:
1709 case -NFS4ERR_OLD_STATEID:
1710 case -NFS4ERR_BAD_STATEID:
1711 case -NFS4ERR_EXPIRED:
1712 if (calldata->arg.fmode == 0)
1715 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1716 nfs4_restart_rpc(task, server->nfs_client);
1720 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
1721 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1724 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1726 struct nfs4_closedata *calldata = data;
1727 struct nfs4_state *state = calldata->state;
1728 int clear_rd, clear_wr, clear_rdwr;
1730 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1733 clear_rd = clear_wr = clear_rdwr = 0;
1734 spin_lock(&state->owner->so_lock);
1735 /* Calculate the change in open mode */
1736 if (state->n_rdwr == 0) {
1737 if (state->n_rdonly == 0) {
1738 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1739 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1741 if (state->n_wronly == 0) {
1742 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1743 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1746 spin_unlock(&state->owner->so_lock);
1747 if (!clear_rd && !clear_wr && !clear_rdwr) {
1748 /* Note: exit _without_ calling nfs4_close_done */
1749 task->tk_action = NULL;
1752 nfs_fattr_init(calldata->res.fattr);
1753 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1754 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1755 calldata->arg.fmode = FMODE_READ;
1756 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1757 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1758 calldata->arg.fmode = FMODE_WRITE;
1760 calldata->timestamp = jiffies;
1761 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1762 &calldata->arg.seq_args, &calldata->res.seq_res,
1765 rpc_call_start(task);
1768 static const struct rpc_call_ops nfs4_close_ops = {
1769 .rpc_call_prepare = nfs4_close_prepare,
1770 .rpc_call_done = nfs4_close_done,
1771 .rpc_release = nfs4_free_closedata,
1775 * It is possible for data to be read/written from a mem-mapped file
1776 * after the sys_close call (which hits the vfs layer as a flush).
1777 * This means that we can't safely call nfsv4 close on a file until
1778 * the inode is cleared. This in turn means that we are not good
1779 * NFSv4 citizens - we do not indicate to the server to update the file's
1780 * share state even when we are done with one of the three share
1781 * stateid's in the inode.
1783 * NOTE: Caller must be holding the sp->so_owner semaphore!
1785 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1787 struct nfs_server *server = NFS_SERVER(state->inode);
1788 struct nfs4_closedata *calldata;
1789 struct nfs4_state_owner *sp = state->owner;
1790 struct rpc_task *task;
1791 struct rpc_message msg = {
1792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1793 .rpc_cred = state->owner->so_cred,
1795 struct rpc_task_setup task_setup_data = {
1796 .rpc_client = server->client,
1797 .rpc_message = &msg,
1798 .callback_ops = &nfs4_close_ops,
1799 .workqueue = nfsiod_workqueue,
1800 .flags = RPC_TASK_ASYNC,
1802 int status = -ENOMEM;
1804 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1805 if (calldata == NULL)
1807 calldata->inode = state->inode;
1808 calldata->state = state;
1809 calldata->arg.fh = NFS_FH(state->inode);
1810 calldata->arg.stateid = &state->open_stateid;
1811 /* Serialization for the sequence id */
1812 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1813 if (calldata->arg.seqid == NULL)
1814 goto out_free_calldata;
1815 calldata->arg.fmode = 0;
1816 calldata->arg.bitmask = server->cache_consistency_bitmask;
1817 calldata->res.fattr = &calldata->fattr;
1818 calldata->res.seqid = calldata->arg.seqid;
1819 calldata->res.server = server;
1820 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1821 calldata->path.mnt = mntget(path->mnt);
1822 calldata->path.dentry = dget(path->dentry);
1824 msg.rpc_argp = &calldata->arg,
1825 msg.rpc_resp = &calldata->res,
1826 task_setup_data.callback_data = calldata;
1827 task = rpc_run_task(&task_setup_data);
1829 return PTR_ERR(task);
1832 status = rpc_wait_for_completion_task(task);
1838 nfs4_put_open_state(state);
1839 nfs4_put_state_owner(sp);
1843 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1848 /* If the open_intent is for execute, we have an extra check to make */
1849 if (fmode & FMODE_EXEC) {
1850 ret = nfs_may_open(state->inode,
1851 state->owner->so_cred,
1852 nd->intent.open.flags);
1856 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1857 if (!IS_ERR(filp)) {
1858 struct nfs_open_context *ctx;
1859 ctx = nfs_file_open_context(filp);
1863 ret = PTR_ERR(filp);
1865 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1870 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1872 struct path path = {
1873 .mnt = nd->path.mnt,
1876 struct dentry *parent;
1878 struct rpc_cred *cred;
1879 struct nfs4_state *state;
1881 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1883 if (nd->flags & LOOKUP_CREATE) {
1884 attr.ia_mode = nd->intent.open.create_mode;
1885 attr.ia_valid = ATTR_MODE;
1886 if (!IS_POSIXACL(dir))
1887 attr.ia_mode &= ~current_umask();
1890 BUG_ON(nd->intent.open.flags & O_CREAT);
1893 cred = rpc_lookup_cred();
1895 return (struct dentry *)cred;
1896 parent = dentry->d_parent;
1897 /* Protect against concurrent sillydeletes */
1898 nfs_block_sillyrename(parent);
1899 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1901 if (IS_ERR(state)) {
1902 if (PTR_ERR(state) == -ENOENT) {
1903 d_add(dentry, NULL);
1904 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1906 nfs_unblock_sillyrename(parent);
1907 return (struct dentry *)state;
1909 res = d_add_unique(dentry, igrab(state->inode));
1912 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1913 nfs_unblock_sillyrename(parent);
1914 nfs4_intent_set_file(nd, &path, state, fmode);
1919 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1921 struct path path = {
1922 .mnt = nd->path.mnt,
1925 struct rpc_cred *cred;
1926 struct nfs4_state *state;
1927 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1929 cred = rpc_lookup_cred();
1931 return PTR_ERR(cred);
1932 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1934 if (IS_ERR(state)) {
1935 switch (PTR_ERR(state)) {
1941 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1947 if (state->inode == dentry->d_inode) {
1948 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1949 nfs4_intent_set_file(nd, &path, state, fmode);
1952 nfs4_close_sync(&path, state, fmode);
1958 void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1960 if (ctx->state == NULL)
1963 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1965 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1968 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1970 struct nfs4_server_caps_arg args = {
1973 struct nfs4_server_caps_res res = {};
1974 struct rpc_message msg = {
1975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1981 status = nfs4_call_sync(server, &msg, &args, &res, 0);
1983 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1984 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1985 server->caps |= NFS_CAP_ACLS;
1986 if (res.has_links != 0)
1987 server->caps |= NFS_CAP_HARDLINKS;
1988 if (res.has_symlinks != 0)
1989 server->caps |= NFS_CAP_SYMLINKS;
1990 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
1991 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
1992 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1993 server->acl_bitmask = res.acl_bitmask;
1999 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2001 struct nfs4_exception exception = { };
2004 err = nfs4_handle_exception(server,
2005 _nfs4_server_capabilities(server, fhandle),
2007 } while (exception.retry);
2011 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2012 struct nfs_fsinfo *info)
2014 struct nfs4_lookup_root_arg args = {
2015 .bitmask = nfs4_fattr_bitmap,
2017 struct nfs4_lookup_res res = {
2019 .fattr = info->fattr,
2022 struct rpc_message msg = {
2023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2027 nfs_fattr_init(info->fattr);
2028 return nfs4_call_sync(server, &msg, &args, &res, 0);
2031 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2032 struct nfs_fsinfo *info)
2034 struct nfs4_exception exception = { };
2037 err = nfs4_handle_exception(server,
2038 _nfs4_lookup_root(server, fhandle, info),
2040 } while (exception.retry);
2045 * get the file handle for the "/" directory on the server
2047 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2048 struct nfs_fsinfo *info)
2052 status = nfs4_lookup_root(server, fhandle, info);
2054 status = nfs4_server_capabilities(server, fhandle);
2056 status = nfs4_do_fsinfo(server, fhandle, info);
2057 return nfs4_map_errors(status);
2061 * Get locations and (maybe) other attributes of a referral.
2062 * Note that we'll actually follow the referral later when
2063 * we detect fsid mismatch in inode revalidation
2065 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2067 int status = -ENOMEM;
2068 struct page *page = NULL;
2069 struct nfs4_fs_locations *locations = NULL;
2071 page = alloc_page(GFP_KERNEL);
2074 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2075 if (locations == NULL)
2078 status = nfs4_proc_fs_locations(dir, name, locations, page);
2081 /* Make sure server returned a different fsid for the referral */
2082 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2083 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2088 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2089 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2091 fattr->mode = S_IFDIR;
2092 memset(fhandle, 0, sizeof(struct nfs_fh));
2101 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2103 struct nfs4_getattr_arg args = {
2105 .bitmask = server->attr_bitmask,
2107 struct nfs4_getattr_res res = {
2111 struct rpc_message msg = {
2112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2117 nfs_fattr_init(fattr);
2118 return nfs4_call_sync(server, &msg, &args, &res, 0);
2121 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2123 struct nfs4_exception exception = { };
2126 err = nfs4_handle_exception(server,
2127 _nfs4_proc_getattr(server, fhandle, fattr),
2129 } while (exception.retry);
2134 * The file is not closed if it is opened due to the a request to change
2135 * the size of the file. The open call will not be needed once the
2136 * VFS layer lookup-intents are implemented.
2138 * Close is called when the inode is destroyed.
2139 * If we haven't opened the file for O_WRONLY, we
2140 * need to in the size_change case to obtain a stateid.
2143 * Because OPEN is always done by name in nfsv4, it is
2144 * possible that we opened a different file by the same
2145 * name. We can recognize this race condition, but we
2146 * can't do anything about it besides returning an error.
2148 * This will be fixed with VFS changes (lookup-intent).
2151 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2152 struct iattr *sattr)
2154 struct inode *inode = dentry->d_inode;
2155 struct rpc_cred *cred = NULL;
2156 struct nfs4_state *state = NULL;
2159 nfs_fattr_init(fattr);
2161 /* Search for an existing open(O_WRITE) file */
2162 if (sattr->ia_valid & ATTR_FILE) {
2163 struct nfs_open_context *ctx;
2165 ctx = nfs_file_open_context(sattr->ia_file);
2172 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2174 nfs_setattr_update_inode(inode, sattr);
2178 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2179 const struct qstr *name, struct nfs_fh *fhandle,
2180 struct nfs_fattr *fattr)
2183 struct nfs4_lookup_arg args = {
2184 .bitmask = server->attr_bitmask,
2188 struct nfs4_lookup_res res = {
2193 struct rpc_message msg = {
2194 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2199 nfs_fattr_init(fattr);
2201 dprintk("NFS call lookupfh %s\n", name->name);
2202 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2203 dprintk("NFS reply lookupfh: %d\n", status);
2207 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2208 struct qstr *name, struct nfs_fh *fhandle,
2209 struct nfs_fattr *fattr)
2211 struct nfs4_exception exception = { };
2214 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2216 if (err == -NFS4ERR_MOVED) {
2220 err = nfs4_handle_exception(server, err, &exception);
2221 } while (exception.retry);
2225 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2226 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2230 dprintk("NFS call lookup %s\n", name->name);
2231 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2232 if (status == -NFS4ERR_MOVED)
2233 status = nfs4_get_referral(dir, name, fattr, fhandle);
2234 dprintk("NFS reply lookup: %d\n", status);
2238 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2240 struct nfs4_exception exception = { };
2243 err = nfs4_handle_exception(NFS_SERVER(dir),
2244 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2246 } while (exception.retry);
2250 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2252 struct nfs_server *server = NFS_SERVER(inode);
2253 struct nfs_fattr fattr;
2254 struct nfs4_accessargs args = {
2255 .fh = NFS_FH(inode),
2256 .bitmask = server->attr_bitmask,
2258 struct nfs4_accessres res = {
2262 struct rpc_message msg = {
2263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2266 .rpc_cred = entry->cred,
2268 int mode = entry->mask;
2272 * Determine which access bits we want to ask for...
2274 if (mode & MAY_READ)
2275 args.access |= NFS4_ACCESS_READ;
2276 if (S_ISDIR(inode->i_mode)) {
2277 if (mode & MAY_WRITE)
2278 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2279 if (mode & MAY_EXEC)
2280 args.access |= NFS4_ACCESS_LOOKUP;
2282 if (mode & MAY_WRITE)
2283 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2284 if (mode & MAY_EXEC)
2285 args.access |= NFS4_ACCESS_EXECUTE;
2287 nfs_fattr_init(&fattr);
2288 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2291 if (res.access & NFS4_ACCESS_READ)
2292 entry->mask |= MAY_READ;
2293 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2294 entry->mask |= MAY_WRITE;
2295 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2296 entry->mask |= MAY_EXEC;
2297 nfs_refresh_inode(inode, &fattr);
2302 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2304 struct nfs4_exception exception = { };
2307 err = nfs4_handle_exception(NFS_SERVER(inode),
2308 _nfs4_proc_access(inode, entry),
2310 } while (exception.retry);
2315 * TODO: For the time being, we don't try to get any attributes
2316 * along with any of the zero-copy operations READ, READDIR,
2319 * In the case of the first three, we want to put the GETATTR
2320 * after the read-type operation -- this is because it is hard
2321 * to predict the length of a GETATTR response in v4, and thus
2322 * align the READ data correctly. This means that the GETATTR
2323 * may end up partially falling into the page cache, and we should
2324 * shift it into the 'tail' of the xdr_buf before processing.
2325 * To do this efficiently, we need to know the total length
2326 * of data received, which doesn't seem to be available outside
2329 * In the case of WRITE, we also want to put the GETATTR after
2330 * the operation -- in this case because we want to make sure
2331 * we get the post-operation mtime and size. This means that
2332 * we can't use xdr_encode_pages() as written: we need a variant
2333 * of it which would leave room in the 'tail' iovec.
2335 * Both of these changes to the XDR layer would in fact be quite
2336 * minor, but I decided to leave them for a subsequent patch.
2338 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2339 unsigned int pgbase, unsigned int pglen)
2341 struct nfs4_readlink args = {
2342 .fh = NFS_FH(inode),
2347 struct nfs4_readlink_res res;
2348 struct rpc_message msg = {
2349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2354 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2357 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2358 unsigned int pgbase, unsigned int pglen)
2360 struct nfs4_exception exception = { };
2363 err = nfs4_handle_exception(NFS_SERVER(inode),
2364 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2366 } while (exception.retry);
2372 * We will need to arrange for the VFS layer to provide an atomic open.
2373 * Until then, this create/open method is prone to inefficiency and race
2374 * conditions due to the lookup, create, and open VFS calls from sys_open()
2375 * placed on the wire.
2377 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2378 * The file will be opened again in the subsequent VFS open call
2379 * (nfs4_proc_file_open).
2381 * The open for read will just hang around to be used by any process that
2382 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2386 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2387 int flags, struct nameidata *nd)
2389 struct path path = {
2390 .mnt = nd->path.mnt,
2393 struct nfs4_state *state;
2394 struct rpc_cred *cred;
2395 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2398 cred = rpc_lookup_cred();
2400 status = PTR_ERR(cred);
2403 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2405 if (IS_ERR(state)) {
2406 status = PTR_ERR(state);
2409 d_add(dentry, igrab(state->inode));
2410 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2411 if (flags & O_EXCL) {
2412 struct nfs_fattr fattr;
2413 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2415 nfs_setattr_update_inode(state->inode, sattr);
2416 nfs_post_op_update_inode(state->inode, &fattr);
2418 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2419 status = nfs4_intent_set_file(nd, &path, state, fmode);
2421 nfs4_close_sync(&path, state, fmode);
2428 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2430 struct nfs_server *server = NFS_SERVER(dir);
2431 struct nfs_removeargs args = {
2433 .name.len = name->len,
2434 .name.name = name->name,
2435 .bitmask = server->attr_bitmask,
2437 struct nfs_removeres res = {
2440 struct rpc_message msg = {
2441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2447 nfs_fattr_init(&res.dir_attr);
2448 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2450 update_changeattr(dir, &res.cinfo);
2451 nfs_post_op_update_inode(dir, &res.dir_attr);
2456 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2458 struct nfs4_exception exception = { };
2461 err = nfs4_handle_exception(NFS_SERVER(dir),
2462 _nfs4_proc_remove(dir, name),
2464 } while (exception.retry);
2468 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2470 struct nfs_server *server = NFS_SERVER(dir);
2471 struct nfs_removeargs *args = msg->rpc_argp;
2472 struct nfs_removeres *res = msg->rpc_resp;
2474 args->bitmask = server->cache_consistency_bitmask;
2475 res->server = server;
2476 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2479 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2481 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2483 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
2484 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2486 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
2487 update_changeattr(dir, &res->cinfo);
2488 nfs_post_op_update_inode(dir, &res->dir_attr);
2492 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2493 struct inode *new_dir, struct qstr *new_name)
2495 struct nfs_server *server = NFS_SERVER(old_dir);
2496 struct nfs4_rename_arg arg = {
2497 .old_dir = NFS_FH(old_dir),
2498 .new_dir = NFS_FH(new_dir),
2499 .old_name = old_name,
2500 .new_name = new_name,
2501 .bitmask = server->attr_bitmask,
2503 struct nfs_fattr old_fattr, new_fattr;
2504 struct nfs4_rename_res res = {
2506 .old_fattr = &old_fattr,
2507 .new_fattr = &new_fattr,
2509 struct rpc_message msg = {
2510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2516 nfs_fattr_init(res.old_fattr);
2517 nfs_fattr_init(res.new_fattr);
2518 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2521 update_changeattr(old_dir, &res.old_cinfo);
2522 nfs_post_op_update_inode(old_dir, res.old_fattr);
2523 update_changeattr(new_dir, &res.new_cinfo);
2524 nfs_post_op_update_inode(new_dir, res.new_fattr);
2529 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2530 struct inode *new_dir, struct qstr *new_name)
2532 struct nfs4_exception exception = { };
2535 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2536 _nfs4_proc_rename(old_dir, old_name,
2539 } while (exception.retry);
2543 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2545 struct nfs_server *server = NFS_SERVER(inode);
2546 struct nfs4_link_arg arg = {
2547 .fh = NFS_FH(inode),
2548 .dir_fh = NFS_FH(dir),
2550 .bitmask = server->attr_bitmask,
2552 struct nfs_fattr fattr, dir_attr;
2553 struct nfs4_link_res res = {
2556 .dir_attr = &dir_attr,
2558 struct rpc_message msg = {
2559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2565 nfs_fattr_init(res.fattr);
2566 nfs_fattr_init(res.dir_attr);
2567 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2569 update_changeattr(dir, &res.cinfo);
2570 nfs_post_op_update_inode(dir, res.dir_attr);
2571 nfs_post_op_update_inode(inode, res.fattr);
2577 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2579 struct nfs4_exception exception = { };
2582 err = nfs4_handle_exception(NFS_SERVER(inode),
2583 _nfs4_proc_link(inode, dir, name),
2585 } while (exception.retry);
2589 struct nfs4_createdata {
2590 struct rpc_message msg;
2591 struct nfs4_create_arg arg;
2592 struct nfs4_create_res res;
2594 struct nfs_fattr fattr;
2595 struct nfs_fattr dir_fattr;
2598 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2599 struct qstr *name, struct iattr *sattr, u32 ftype)
2601 struct nfs4_createdata *data;
2603 data = kzalloc(sizeof(*data), GFP_KERNEL);
2605 struct nfs_server *server = NFS_SERVER(dir);
2607 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2608 data->msg.rpc_argp = &data->arg;
2609 data->msg.rpc_resp = &data->res;
2610 data->arg.dir_fh = NFS_FH(dir);
2611 data->arg.server = server;
2612 data->arg.name = name;
2613 data->arg.attrs = sattr;
2614 data->arg.ftype = ftype;
2615 data->arg.bitmask = server->attr_bitmask;
2616 data->res.server = server;
2617 data->res.fh = &data->fh;
2618 data->res.fattr = &data->fattr;
2619 data->res.dir_fattr = &data->dir_fattr;
2620 nfs_fattr_init(data->res.fattr);
2621 nfs_fattr_init(data->res.dir_fattr);
2626 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2628 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2629 &data->arg, &data->res, 1);
2631 update_changeattr(dir, &data->res.dir_cinfo);
2632 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2633 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2638 static void nfs4_free_createdata(struct nfs4_createdata *data)
2643 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2644 struct page *page, unsigned int len, struct iattr *sattr)
2646 struct nfs4_createdata *data;
2647 int status = -ENAMETOOLONG;
2649 if (len > NFS4_MAXPATHLEN)
2653 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2657 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2658 data->arg.u.symlink.pages = &page;
2659 data->arg.u.symlink.len = len;
2661 status = nfs4_do_create(dir, dentry, data);
2663 nfs4_free_createdata(data);
2668 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2669 struct page *page, unsigned int len, struct iattr *sattr)
2671 struct nfs4_exception exception = { };
2674 err = nfs4_handle_exception(NFS_SERVER(dir),
2675 _nfs4_proc_symlink(dir, dentry, page,
2678 } while (exception.retry);
2682 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2683 struct iattr *sattr)
2685 struct nfs4_createdata *data;
2686 int status = -ENOMEM;
2688 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2692 status = nfs4_do_create(dir, dentry, data);
2694 nfs4_free_createdata(data);
2699 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2700 struct iattr *sattr)
2702 struct nfs4_exception exception = { };
2705 err = nfs4_handle_exception(NFS_SERVER(dir),
2706 _nfs4_proc_mkdir(dir, dentry, sattr),
2708 } while (exception.retry);
2712 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2713 u64 cookie, struct page *page, unsigned int count, int plus)
2715 struct inode *dir = dentry->d_inode;
2716 struct nfs4_readdir_arg args = {
2721 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
2723 struct nfs4_readdir_res res;
2724 struct rpc_message msg = {
2725 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2732 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2733 dentry->d_parent->d_name.name,
2734 dentry->d_name.name,
2735 (unsigned long long)cookie);
2736 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2737 res.pgbase = args.pgbase;
2738 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2740 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2742 nfs_invalidate_atime(dir);
2744 dprintk("%s: returns %d\n", __func__, status);
2748 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2749 u64 cookie, struct page *page, unsigned int count, int plus)
2751 struct nfs4_exception exception = { };
2754 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2755 _nfs4_proc_readdir(dentry, cred, cookie,
2758 } while (exception.retry);
2762 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2763 struct iattr *sattr, dev_t rdev)
2765 struct nfs4_createdata *data;
2766 int mode = sattr->ia_mode;
2767 int status = -ENOMEM;
2769 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2770 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2772 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2777 data->arg.ftype = NF4FIFO;
2778 else if (S_ISBLK(mode)) {
2779 data->arg.ftype = NF4BLK;
2780 data->arg.u.device.specdata1 = MAJOR(rdev);
2781 data->arg.u.device.specdata2 = MINOR(rdev);
2783 else if (S_ISCHR(mode)) {
2784 data->arg.ftype = NF4CHR;
2785 data->arg.u.device.specdata1 = MAJOR(rdev);
2786 data->arg.u.device.specdata2 = MINOR(rdev);
2789 status = nfs4_do_create(dir, dentry, data);
2791 nfs4_free_createdata(data);
2796 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2797 struct iattr *sattr, dev_t rdev)
2799 struct nfs4_exception exception = { };
2802 err = nfs4_handle_exception(NFS_SERVER(dir),
2803 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2805 } while (exception.retry);
2809 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2810 struct nfs_fsstat *fsstat)
2812 struct nfs4_statfs_arg args = {
2814 .bitmask = server->attr_bitmask,
2816 struct nfs4_statfs_res res = {
2819 struct rpc_message msg = {
2820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2825 nfs_fattr_init(fsstat->fattr);
2826 return nfs4_call_sync(server, &msg, &args, &res, 0);
2829 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2831 struct nfs4_exception exception = { };
2834 err = nfs4_handle_exception(server,
2835 _nfs4_proc_statfs(server, fhandle, fsstat),
2837 } while (exception.retry);
2841 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2842 struct nfs_fsinfo *fsinfo)
2844 struct nfs4_fsinfo_arg args = {
2846 .bitmask = server->attr_bitmask,
2848 struct nfs4_fsinfo_res res = {
2851 struct rpc_message msg = {
2852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2857 return nfs4_call_sync(server, &msg, &args, &res, 0);
2860 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2862 struct nfs4_exception exception = { };
2866 err = nfs4_handle_exception(server,
2867 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2869 } while (exception.retry);
2873 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2875 nfs_fattr_init(fsinfo->fattr);
2876 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2879 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2880 struct nfs_pathconf *pathconf)
2882 struct nfs4_pathconf_arg args = {
2884 .bitmask = server->attr_bitmask,
2886 struct nfs4_pathconf_res res = {
2887 .pathconf = pathconf,
2889 struct rpc_message msg = {
2890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2895 /* None of the pathconf attributes are mandatory to implement */
2896 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2897 memset(pathconf, 0, sizeof(*pathconf));
2901 nfs_fattr_init(pathconf->fattr);
2902 return nfs4_call_sync(server, &msg, &args, &res, 0);
2905 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2906 struct nfs_pathconf *pathconf)
2908 struct nfs4_exception exception = { };
2912 err = nfs4_handle_exception(server,
2913 _nfs4_proc_pathconf(server, fhandle, pathconf),
2915 } while (exception.retry);
2919 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2921 struct nfs_server *server = NFS_SERVER(data->inode);
2923 dprintk("--> %s\n", __func__);
2925 /* nfs4_sequence_free_slot called in the read rpc_call_done */
2926 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2928 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2929 nfs4_restart_rpc(task, server->nfs_client);
2933 nfs_invalidate_atime(data->inode);
2934 if (task->tk_status > 0)
2935 renew_lease(server, data->timestamp);
2939 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2941 data->timestamp = jiffies;
2942 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2945 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2947 struct inode *inode = data->inode;
2949 /* slot is freed in nfs_writeback_done */
2950 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2953 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
2954 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
2957 if (task->tk_status >= 0) {
2958 renew_lease(NFS_SERVER(inode), data->timestamp);
2959 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2964 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
2966 struct nfs_server *server = NFS_SERVER(data->inode);
2968 data->args.bitmask = server->cache_consistency_bitmask;
2969 data->res.server = server;
2970 data->timestamp = jiffies;
2972 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
2975 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2977 struct inode *inode = data->inode;
2979 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2981 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
2982 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
2985 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
2986 &data->res.seq_res);
2987 nfs_refresh_inode(inode, data->res.fattr);
2991 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
2993 struct nfs_server *server = NFS_SERVER(data->inode);
2995 data->args.bitmask = server->cache_consistency_bitmask;
2996 data->res.server = server;
2997 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3001 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3002 * standalone procedure for queueing an asynchronous RENEW.
3004 static void nfs4_renew_done(struct rpc_task *task, void *data)
3006 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
3007 unsigned long timestamp = (unsigned long)data;
3009 if (task->tk_status < 0) {
3010 /* Unless we're shutting down, schedule state recovery! */
3011 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3012 nfs4_schedule_state_recovery(clp);
3015 spin_lock(&clp->cl_lock);
3016 if (time_before(clp->cl_last_renewal,timestamp))
3017 clp->cl_last_renewal = timestamp;
3018 spin_unlock(&clp->cl_lock);
3019 dprintk("%s calling put_rpccred on rpc_cred %p\n", __func__,
3020 task->tk_msg.rpc_cred);
3021 put_rpccred(task->tk_msg.rpc_cred);
3024 static const struct rpc_call_ops nfs4_renew_ops = {
3025 .rpc_call_done = nfs4_renew_done,
3028 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3030 struct rpc_message msg = {
3031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3036 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3037 &nfs4_renew_ops, (void *)jiffies);
3040 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3042 struct rpc_message msg = {
3043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3047 unsigned long now = jiffies;
3050 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3053 spin_lock(&clp->cl_lock);
3054 if (time_before(clp->cl_last_renewal,now))
3055 clp->cl_last_renewal = now;
3056 spin_unlock(&clp->cl_lock);
3060 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3062 return (server->caps & NFS_CAP_ACLS)
3063 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3064 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3067 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3068 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3071 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3073 static void buf_to_pages(const void *buf, size_t buflen,
3074 struct page **pages, unsigned int *pgbase)
3076 const void *p = buf;
3078 *pgbase = offset_in_page(buf);
3080 while (p < buf + buflen) {
3081 *(pages++) = virt_to_page(p);
3082 p += PAGE_CACHE_SIZE;
3086 struct nfs4_cached_acl {
3092 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3094 struct nfs_inode *nfsi = NFS_I(inode);
3096 spin_lock(&inode->i_lock);
3097 kfree(nfsi->nfs4_acl);
3098 nfsi->nfs4_acl = acl;
3099 spin_unlock(&inode->i_lock);
3102 static void nfs4_zap_acl_attr(struct inode *inode)
3104 nfs4_set_cached_acl(inode, NULL);
3107 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3109 struct nfs_inode *nfsi = NFS_I(inode);
3110 struct nfs4_cached_acl *acl;
3113 spin_lock(&inode->i_lock);
3114 acl = nfsi->nfs4_acl;
3117 if (buf == NULL) /* user is just asking for length */
3119 if (acl->cached == 0)
3121 ret = -ERANGE; /* see getxattr(2) man page */
3122 if (acl->len > buflen)
3124 memcpy(buf, acl->data, acl->len);
3128 spin_unlock(&inode->i_lock);
3132 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3134 struct nfs4_cached_acl *acl;
3136 if (buf && acl_len <= PAGE_SIZE) {
3137 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3141 memcpy(acl->data, buf, acl_len);
3143 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3150 nfs4_set_cached_acl(inode, acl);
3153 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3155 struct page *pages[NFS4ACL_MAXPAGES];
3156 struct nfs_getaclargs args = {
3157 .fh = NFS_FH(inode),
3161 struct nfs_getaclres res = {
3165 struct rpc_message msg = {
3166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3170 struct page *localpage = NULL;
3173 if (buflen < PAGE_SIZE) {
3174 /* As long as we're doing a round trip to the server anyway,
3175 * let's be prepared for a page of acl data. */
3176 localpage = alloc_page(GFP_KERNEL);
3177 resp_buf = page_address(localpage);
3178 if (localpage == NULL)
3180 args.acl_pages[0] = localpage;
3181 args.acl_pgbase = 0;
3182 args.acl_len = PAGE_SIZE;
3185 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3187 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3190 if (res.acl_len > args.acl_len)
3191 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3193 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3196 if (res.acl_len > buflen)
3199 memcpy(buf, resp_buf, res.acl_len);
3204 __free_page(localpage);
3208 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3210 struct nfs4_exception exception = { };
3213 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3216 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3217 } while (exception.retry);
3221 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3223 struct nfs_server *server = NFS_SERVER(inode);
3226 if (!nfs4_server_supports_acls(server))
3228 ret = nfs_revalidate_inode(server, inode);
3231 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3232 nfs_zap_acl_cache(inode);
3233 ret = nfs4_read_cached_acl(inode, buf, buflen);
3236 return nfs4_get_acl_uncached(inode, buf, buflen);
3239 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3241 struct nfs_server *server = NFS_SERVER(inode);
3242 struct page *pages[NFS4ACL_MAXPAGES];
3243 struct nfs_setaclargs arg = {
3244 .fh = NFS_FH(inode),
3248 struct nfs_setaclres res;
3249 struct rpc_message msg = {
3250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3256 if (!nfs4_server_supports_acls(server))
3258 nfs_inode_return_delegation(inode);
3259 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3260 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3261 nfs_access_zap_cache(inode);
3262 nfs_zap_acl_cache(inode);
3266 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3268 struct nfs4_exception exception = { };
3271 err = nfs4_handle_exception(NFS_SERVER(inode),
3272 __nfs4_proc_set_acl(inode, buf, buflen),
3274 } while (exception.retry);
3279 _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
3281 if (!clp || task->tk_status >= 0)
3283 switch(task->tk_status) {
3284 case -NFS4ERR_ADMIN_REVOKED:
3285 case -NFS4ERR_BAD_STATEID:
3286 case -NFS4ERR_OPENMODE:
3289 nfs4_state_mark_reclaim_nograce(clp, state);
3290 case -NFS4ERR_STALE_CLIENTID:
3291 case -NFS4ERR_STALE_STATEID:
3292 case -NFS4ERR_EXPIRED:
3293 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3294 nfs4_schedule_state_recovery(clp);
3295 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3296 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3297 task->tk_status = 0;
3299 #if defined(CONFIG_NFS_V4_1)
3300 case -NFS4ERR_BADSESSION:
3301 case -NFS4ERR_BADSLOT:
3302 case -NFS4ERR_BAD_HIGH_SLOT:
3303 case -NFS4ERR_DEADSESSION:
3304 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3305 case -NFS4ERR_SEQ_FALSE_RETRY:
3306 case -NFS4ERR_SEQ_MISORDERED:
3307 dprintk("%s ERROR %d, Reset session\n", __func__,
3309 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
3310 task->tk_status = 0;
3312 #endif /* CONFIG_NFS_V4_1 */
3313 case -NFS4ERR_DELAY:
3315 nfs_inc_server_stats(server, NFSIOS_DELAY);
3316 case -NFS4ERR_GRACE:
3317 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3318 task->tk_status = 0;
3320 case -NFS4ERR_OLD_STATEID:
3321 task->tk_status = 0;
3324 task->tk_status = nfs4_map_errors(task->tk_status);
3329 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3331 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3334 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
3336 nfs4_verifier sc_verifier;
3337 struct nfs4_setclientid setclientid = {
3338 .sc_verifier = &sc_verifier,
3341 struct rpc_message msg = {
3342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3343 .rpc_argp = &setclientid,
3351 p = (__be32*)sc_verifier.data;
3352 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3353 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3356 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3357 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3359 rpc_peeraddr2str(clp->cl_rpcclient,
3361 rpc_peeraddr2str(clp->cl_rpcclient,
3363 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3364 clp->cl_id_uniquifier);
3365 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3366 sizeof(setclientid.sc_netid),
3367 rpc_peeraddr2str(clp->cl_rpcclient,
3368 RPC_DISPLAY_NETID));
3369 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3370 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3371 clp->cl_ipaddr, port >> 8, port & 255);
3373 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3374 if (status != -NFS4ERR_CLID_INUSE)
3379 ssleep(clp->cl_lease_time + 1);
3381 if (++clp->cl_id_uniquifier == 0)
3387 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3389 struct nfs_fsinfo fsinfo;
3390 struct rpc_message msg = {
3391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3393 .rpc_resp = &fsinfo,
3400 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3402 spin_lock(&clp->cl_lock);
3403 clp->cl_lease_time = fsinfo.lease_time * HZ;
3404 clp->cl_last_renewal = now;
3405 spin_unlock(&clp->cl_lock);
3410 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3415 err = _nfs4_proc_setclientid_confirm(clp, cred);
3419 case -NFS4ERR_RESOURCE:
3420 /* The IBM lawyers misread another document! */
3421 case -NFS4ERR_DELAY:
3422 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3428 struct nfs4_delegreturndata {
3429 struct nfs4_delegreturnargs args;
3430 struct nfs4_delegreturnres res;
3432 nfs4_stateid stateid;
3433 unsigned long timestamp;
3434 struct nfs_fattr fattr;
3438 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3440 struct nfs4_delegreturndata *data = calldata;
3442 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3445 data->rpc_status = task->tk_status;
3446 if (data->rpc_status == 0)
3447 renew_lease(data->res.server, data->timestamp);
3450 static void nfs4_delegreturn_release(void *calldata)
3455 #if defined(CONFIG_NFS_V4_1)
3456 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3458 struct nfs4_delegreturndata *d_data;
3460 d_data = (struct nfs4_delegreturndata *)data;
3462 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3463 &d_data->args.seq_args,
3464 &d_data->res.seq_res, 1, task))
3466 rpc_call_start(task);
3468 #endif /* CONFIG_NFS_V4_1 */
3470 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3471 #if defined(CONFIG_NFS_V4_1)
3472 .rpc_call_prepare = nfs4_delegreturn_prepare,
3473 #endif /* CONFIG_NFS_V4_1 */
3474 .rpc_call_done = nfs4_delegreturn_done,
3475 .rpc_release = nfs4_delegreturn_release,
3478 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3480 struct nfs4_delegreturndata *data;
3481 struct nfs_server *server = NFS_SERVER(inode);
3482 struct rpc_task *task;
3483 struct rpc_message msg = {
3484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3487 struct rpc_task_setup task_setup_data = {
3488 .rpc_client = server->client,
3489 .rpc_message = &msg,
3490 .callback_ops = &nfs4_delegreturn_ops,
3491 .flags = RPC_TASK_ASYNC,
3495 data = kzalloc(sizeof(*data), GFP_KERNEL);
3498 data->args.fhandle = &data->fh;
3499 data->args.stateid = &data->stateid;
3500 data->args.bitmask = server->attr_bitmask;
3501 nfs_copy_fh(&data->fh, NFS_FH(inode));
3502 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3503 data->res.fattr = &data->fattr;
3504 data->res.server = server;
3505 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3506 nfs_fattr_init(data->res.fattr);
3507 data->timestamp = jiffies;
3508 data->rpc_status = 0;
3510 task_setup_data.callback_data = data;
3511 msg.rpc_argp = &data->args,
3512 msg.rpc_resp = &data->res,
3513 task = rpc_run_task(&task_setup_data);
3515 return PTR_ERR(task);
3518 status = nfs4_wait_for_completion_rpc_task(task);
3521 status = data->rpc_status;
3524 nfs_refresh_inode(inode, &data->fattr);
3530 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3532 struct nfs_server *server = NFS_SERVER(inode);
3533 struct nfs4_exception exception = { };
3536 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3538 case -NFS4ERR_STALE_STATEID:
3539 case -NFS4ERR_EXPIRED:
3543 err = nfs4_handle_exception(server, err, &exception);
3544 } while (exception.retry);
3548 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3549 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3552 * sleep, with exponential backoff, and retry the LOCK operation.
3554 static unsigned long
3555 nfs4_set_lock_task_retry(unsigned long timeout)
3557 schedule_timeout_killable(timeout);
3559 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3560 return NFS4_LOCK_MAXTIMEOUT;
3564 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3566 struct inode *inode = state->inode;
3567 struct nfs_server *server = NFS_SERVER(inode);
3568 struct nfs_client *clp = server->nfs_client;
3569 struct nfs_lockt_args arg = {
3570 .fh = NFS_FH(inode),
3573 struct nfs_lockt_res res = {
3576 struct rpc_message msg = {
3577 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3580 .rpc_cred = state->owner->so_cred,
3582 struct nfs4_lock_state *lsp;
3585 arg.lock_owner.clientid = clp->cl_clientid;
3586 status = nfs4_set_lock_state(state, request);
3589 lsp = request->fl_u.nfs4_fl.owner;
3590 arg.lock_owner.id = lsp->ls_id.id;
3591 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3594 request->fl_type = F_UNLCK;
3596 case -NFS4ERR_DENIED:
3599 request->fl_ops->fl_release_private(request);
3604 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3606 struct nfs4_exception exception = { };
3610 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3611 _nfs4_proc_getlk(state, cmd, request),
3613 } while (exception.retry);
3617 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3620 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3622 res = posix_lock_file_wait(file, fl);
3625 res = flock_lock_file_wait(file, fl);
3633 struct nfs4_unlockdata {
3634 struct nfs_locku_args arg;
3635 struct nfs_locku_res res;
3636 struct nfs4_lock_state *lsp;
3637 struct nfs_open_context *ctx;
3638 struct file_lock fl;
3639 const struct nfs_server *server;
3640 unsigned long timestamp;
3643 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3644 struct nfs_open_context *ctx,
3645 struct nfs4_lock_state *lsp,
3646 struct nfs_seqid *seqid)
3648 struct nfs4_unlockdata *p;
3649 struct inode *inode = lsp->ls_state->inode;
3651 p = kzalloc(sizeof(*p), GFP_KERNEL);
3654 p->arg.fh = NFS_FH(inode);
3656 p->arg.seqid = seqid;
3657 p->res.seqid = seqid;
3658 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3659 p->arg.stateid = &lsp->ls_stateid;
3661 atomic_inc(&lsp->ls_count);
3662 /* Ensure we don't close file until we're done freeing locks! */
3663 p->ctx = get_nfs_open_context(ctx);
3664 memcpy(&p->fl, fl, sizeof(p->fl));
3665 p->server = NFS_SERVER(inode);
3669 static void nfs4_locku_release_calldata(void *data)
3671 struct nfs4_unlockdata *calldata = data;
3672 nfs_free_seqid(calldata->arg.seqid);
3673 nfs4_put_lock_state(calldata->lsp);
3674 put_nfs_open_context(calldata->ctx);
3678 static void nfs4_locku_done(struct rpc_task *task, void *data)
3680 struct nfs4_unlockdata *calldata = data;
3682 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3684 if (RPC_ASSASSINATED(task))
3686 switch (task->tk_status) {
3688 memcpy(calldata->lsp->ls_stateid.data,
3689 calldata->res.stateid.data,
3690 sizeof(calldata->lsp->ls_stateid.data));
3691 renew_lease(calldata->server, calldata->timestamp);
3693 case -NFS4ERR_BAD_STATEID:
3694 case -NFS4ERR_OLD_STATEID:
3695 case -NFS4ERR_STALE_STATEID:
3696 case -NFS4ERR_EXPIRED:
3699 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3700 nfs4_restart_rpc(task,
3701 calldata->server->nfs_client);
3703 nfs4_sequence_free_slot(calldata->server->nfs_client,
3704 &calldata->res.seq_res);
3707 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3709 struct nfs4_unlockdata *calldata = data;
3711 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3713 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3714 /* Note: exit _without_ running nfs4_locku_done */
3715 task->tk_action = NULL;
3718 calldata->timestamp = jiffies;
3719 if (nfs4_setup_sequence(calldata->server->nfs_client,
3720 &calldata->arg.seq_args,
3721 &calldata->res.seq_res, 1, task))
3723 rpc_call_start(task);
3726 static const struct rpc_call_ops nfs4_locku_ops = {
3727 .rpc_call_prepare = nfs4_locku_prepare,
3728 .rpc_call_done = nfs4_locku_done,
3729 .rpc_release = nfs4_locku_release_calldata,
3732 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3733 struct nfs_open_context *ctx,
3734 struct nfs4_lock_state *lsp,
3735 struct nfs_seqid *seqid)
3737 struct nfs4_unlockdata *data;
3738 struct rpc_message msg = {
3739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3740 .rpc_cred = ctx->cred,
3742 struct rpc_task_setup task_setup_data = {
3743 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3744 .rpc_message = &msg,
3745 .callback_ops = &nfs4_locku_ops,
3746 .workqueue = nfsiod_workqueue,
3747 .flags = RPC_TASK_ASYNC,
3750 /* Ensure this is an unlock - when canceling a lock, the
3751 * canceled lock is passed in, and it won't be an unlock.
3753 fl->fl_type = F_UNLCK;
3755 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3757 nfs_free_seqid(seqid);
3758 return ERR_PTR(-ENOMEM);
3761 msg.rpc_argp = &data->arg,
3762 msg.rpc_resp = &data->res,
3763 task_setup_data.callback_data = data;
3764 return rpc_run_task(&task_setup_data);
3767 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3769 struct nfs_inode *nfsi = NFS_I(state->inode);
3770 struct nfs_seqid *seqid;
3771 struct nfs4_lock_state *lsp;
3772 struct rpc_task *task;
3774 unsigned char fl_flags = request->fl_flags;
3776 status = nfs4_set_lock_state(state, request);
3777 /* Unlock _before_ we do the RPC call */
3778 request->fl_flags |= FL_EXISTS;
3779 down_read(&nfsi->rwsem);
3780 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3781 up_read(&nfsi->rwsem);
3784 up_read(&nfsi->rwsem);
3787 /* Is this a delegated lock? */
3788 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3790 lsp = request->fl_u.nfs4_fl.owner;
3791 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3795 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3796 status = PTR_ERR(task);
3799 status = nfs4_wait_for_completion_rpc_task(task);
3802 request->fl_flags = fl_flags;
3806 struct nfs4_lockdata {
3807 struct nfs_lock_args arg;
3808 struct nfs_lock_res res;
3809 struct nfs4_lock_state *lsp;
3810 struct nfs_open_context *ctx;
3811 struct file_lock fl;
3812 unsigned long timestamp;
3815 struct nfs_server *server;
3818 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3819 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3821 struct nfs4_lockdata *p;
3822 struct inode *inode = lsp->ls_state->inode;
3823 struct nfs_server *server = NFS_SERVER(inode);
3825 p = kzalloc(sizeof(*p), GFP_KERNEL);
3829 p->arg.fh = NFS_FH(inode);
3831 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3832 if (p->arg.open_seqid == NULL)
3834 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3835 if (p->arg.lock_seqid == NULL)
3836 goto out_free_seqid;
3837 p->arg.lock_stateid = &lsp->ls_stateid;
3838 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3839 p->arg.lock_owner.id = lsp->ls_id.id;
3840 p->res.lock_seqid = p->arg.lock_seqid;
3841 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3844 atomic_inc(&lsp->ls_count);
3845 p->ctx = get_nfs_open_context(ctx);
3846 memcpy(&p->fl, fl, sizeof(p->fl));
3849 nfs_free_seqid(p->arg.open_seqid);
3855 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3857 struct nfs4_lockdata *data = calldata;
3858 struct nfs4_state *state = data->lsp->ls_state;
3860 dprintk("%s: begin!\n", __func__);
3861 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3863 /* Do we need to do an open_to_lock_owner? */
3864 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3865 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3867 data->arg.open_stateid = &state->stateid;
3868 data->arg.new_lock_owner = 1;
3869 data->res.open_seqid = data->arg.open_seqid;
3871 data->arg.new_lock_owner = 0;
3872 data->timestamp = jiffies;
3873 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3874 &data->res.seq_res, 1, task))
3876 rpc_call_start(task);
3877 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3880 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3882 struct nfs4_lockdata *data = calldata;
3884 dprintk("%s: begin!\n", __func__);
3886 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3889 data->rpc_status = task->tk_status;
3890 if (RPC_ASSASSINATED(task))
3892 if (data->arg.new_lock_owner != 0) {
3893 if (data->rpc_status == 0)
3894 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3898 if (data->rpc_status == 0) {
3899 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3900 sizeof(data->lsp->ls_stateid.data));
3901 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3902 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3905 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3908 static void nfs4_lock_release(void *calldata)
3910 struct nfs4_lockdata *data = calldata;
3912 dprintk("%s: begin!\n", __func__);
3913 nfs_free_seqid(data->arg.open_seqid);
3914 if (data->cancelled != 0) {
3915 struct rpc_task *task;
3916 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3917 data->arg.lock_seqid);
3920 dprintk("%s: cancelling lock!\n", __func__);
3922 nfs_free_seqid(data->arg.lock_seqid);
3923 nfs4_put_lock_state(data->lsp);
3924 put_nfs_open_context(data->ctx);
3926 dprintk("%s: done!\n", __func__);
3929 static const struct rpc_call_ops nfs4_lock_ops = {
3930 .rpc_call_prepare = nfs4_lock_prepare,
3931 .rpc_call_done = nfs4_lock_done,
3932 .rpc_release = nfs4_lock_release,
3935 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3937 struct nfs4_lockdata *data;
3938 struct rpc_task *task;
3939 struct rpc_message msg = {
3940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3941 .rpc_cred = state->owner->so_cred,
3943 struct rpc_task_setup task_setup_data = {
3944 .rpc_client = NFS_CLIENT(state->inode),
3945 .rpc_message = &msg,
3946 .callback_ops = &nfs4_lock_ops,
3947 .workqueue = nfsiod_workqueue,
3948 .flags = RPC_TASK_ASYNC,
3952 dprintk("%s: begin!\n", __func__);
3953 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3954 fl->fl_u.nfs4_fl.owner);
3958 data->arg.block = 1;
3960 data->arg.reclaim = 1;
3961 msg.rpc_argp = &data->arg,
3962 msg.rpc_resp = &data->res,
3963 task_setup_data.callback_data = data;
3964 task = rpc_run_task(&task_setup_data);
3966 return PTR_ERR(task);
3967 ret = nfs4_wait_for_completion_rpc_task(task);
3969 ret = data->rpc_status;
3970 if (ret == -NFS4ERR_DENIED)
3973 data->cancelled = 1;
3975 dprintk("%s: done, ret = %d!\n", __func__, ret);
3979 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3981 struct nfs_server *server = NFS_SERVER(state->inode);
3982 struct nfs4_exception exception = { };
3986 /* Cache the lock if possible... */
3987 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3989 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3990 if (err != -NFS4ERR_DELAY)
3992 nfs4_handle_exception(server, err, &exception);
3993 } while (exception.retry);
3997 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3999 struct nfs_server *server = NFS_SERVER(state->inode);
4000 struct nfs4_exception exception = { };
4003 err = nfs4_set_lock_state(state, request);
4007 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4009 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4010 if (err != -NFS4ERR_DELAY)
4012 nfs4_handle_exception(server, err, &exception);
4013 } while (exception.retry);
4017 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4019 struct nfs_inode *nfsi = NFS_I(state->inode);
4020 unsigned char fl_flags = request->fl_flags;
4023 /* Is this a delegated open? */
4024 status = nfs4_set_lock_state(state, request);
4027 request->fl_flags |= FL_ACCESS;
4028 status = do_vfs_lock(request->fl_file, request);
4031 down_read(&nfsi->rwsem);
4032 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4033 /* Yes: cache locks! */
4034 /* ...but avoid races with delegation recall... */
4035 request->fl_flags = fl_flags & ~FL_SLEEP;
4036 status = do_vfs_lock(request->fl_file, request);
4039 status = _nfs4_do_setlk(state, cmd, request, 0);
4042 /* Note: we always want to sleep here! */
4043 request->fl_flags = fl_flags | FL_SLEEP;
4044 if (do_vfs_lock(request->fl_file, request) < 0)
4045 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4047 up_read(&nfsi->rwsem);
4049 request->fl_flags = fl_flags;
4053 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4055 struct nfs4_exception exception = { };
4059 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4060 _nfs4_proc_setlk(state, cmd, request),
4062 } while (exception.retry);
4067 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4069 struct nfs_open_context *ctx;
4070 struct nfs4_state *state;
4071 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4074 /* verify open state */
4075 ctx = nfs_file_open_context(filp);
4078 if (request->fl_start < 0 || request->fl_end < 0)
4082 return nfs4_proc_getlk(state, F_GETLK, request);
4084 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4087 if (request->fl_type == F_UNLCK)
4088 return nfs4_proc_unlck(state, cmd, request);
4091 status = nfs4_proc_setlk(state, cmd, request);
4092 if ((status != -EAGAIN) || IS_SETLK(cmd))
4094 timeout = nfs4_set_lock_task_retry(timeout);
4095 status = -ERESTARTSYS;
4098 } while(status < 0);
4102 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4104 struct nfs_server *server = NFS_SERVER(state->inode);
4105 struct nfs4_exception exception = { };
4108 err = nfs4_set_lock_state(state, fl);
4112 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4113 if (err != -NFS4ERR_DELAY)
4115 err = nfs4_handle_exception(server, err, &exception);
4116 } while (exception.retry);
4121 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4123 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4124 size_t buflen, int flags)
4126 struct inode *inode = dentry->d_inode;
4128 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4131 return nfs4_proc_set_acl(inode, buf, buflen);
4134 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4135 * and that's what we'll do for e.g. user attributes that haven't been set.
4136 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4137 * attributes in kernel-managed attribute namespaces. */
4138 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4141 struct inode *inode = dentry->d_inode;
4143 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4146 return nfs4_proc_get_acl(inode, buf, buflen);
4149 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4151 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4153 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4155 if (buf && buflen < len)
4158 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4162 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4164 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4165 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4166 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4169 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4170 NFS_ATTR_FATTR_NLINK;
4171 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4175 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4176 struct nfs4_fs_locations *fs_locations, struct page *page)
4178 struct nfs_server *server = NFS_SERVER(dir);
4180 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4181 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4183 struct nfs4_fs_locations_arg args = {
4184 .dir_fh = NFS_FH(dir),
4189 struct nfs4_fs_locations_res res = {
4190 .fs_locations = fs_locations,
4192 struct rpc_message msg = {
4193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4199 dprintk("%s: start\n", __func__);
4200 nfs_fattr_init(&fs_locations->fattr);
4201 fs_locations->server = server;
4202 fs_locations->nlocations = 0;
4203 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4204 nfs_fixup_referral_attributes(&fs_locations->fattr);
4205 dprintk("%s: returned status = %d\n", __func__, status);
4209 #ifdef CONFIG_NFS_V4_1
4211 * nfs4_proc_exchange_id()
4213 * Since the clientid has expired, all compounds using sessions
4214 * associated with the stale clientid will be returning
4215 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4216 * be in some phase of session reset.
4218 static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4220 nfs4_verifier verifier;
4221 struct nfs41_exchange_id_args args = {
4223 .flags = clp->cl_exchange_flags,
4225 struct nfs41_exchange_id_res res = {
4229 struct rpc_message msg = {
4230 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4237 dprintk("--> %s\n", __func__);
4238 BUG_ON(clp == NULL);
4240 p = (u32 *)verifier.data;
4241 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4242 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4243 args.verifier = &verifier;
4246 args.id_len = scnprintf(args.id, sizeof(args.id),
4249 rpc_peeraddr2str(clp->cl_rpcclient,
4251 clp->cl_id_uniquifier);
4253 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4255 if (status != NFS4ERR_CLID_INUSE)
4261 if (++clp->cl_id_uniquifier == 0)
4265 dprintk("<-- %s status= %d\n", __func__, status);
4269 struct nfs4_get_lease_time_data {
4270 struct nfs4_get_lease_time_args *args;
4271 struct nfs4_get_lease_time_res *res;
4272 struct nfs_client *clp;
4275 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4279 struct nfs4_get_lease_time_data *data =
4280 (struct nfs4_get_lease_time_data *)calldata;
4282 dprintk("--> %s\n", __func__);
4283 /* just setup sequence, do not trigger session recovery
4284 since we're invoked within one */
4285 ret = nfs41_setup_sequence(data->clp->cl_session,
4286 &data->args->la_seq_args,
4287 &data->res->lr_seq_res, 0, task);
4289 BUG_ON(ret == -EAGAIN);
4290 rpc_call_start(task);
4291 dprintk("<-- %s\n", __func__);
4295 * Called from nfs4_state_manager thread for session setup, so don't recover
4296 * from sequence operation or clientid errors.
4298 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4300 struct nfs4_get_lease_time_data *data =
4301 (struct nfs4_get_lease_time_data *)calldata;
4303 dprintk("--> %s\n", __func__);
4304 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4305 switch (task->tk_status) {
4306 case -NFS4ERR_DELAY:
4307 case -NFS4ERR_GRACE:
4308 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4309 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4310 task->tk_status = 0;
4311 nfs4_restart_rpc(task, data->clp);
4314 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4315 dprintk("<-- %s\n", __func__);
4318 struct rpc_call_ops nfs4_get_lease_time_ops = {
4319 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4320 .rpc_call_done = nfs4_get_lease_time_done,
4323 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4325 struct rpc_task *task;
4326 struct nfs4_get_lease_time_args args;
4327 struct nfs4_get_lease_time_res res = {
4328 .lr_fsinfo = fsinfo,
4330 struct nfs4_get_lease_time_data data = {
4335 struct rpc_message msg = {
4336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4340 struct rpc_task_setup task_setup = {
4341 .rpc_client = clp->cl_rpcclient,
4342 .rpc_message = &msg,
4343 .callback_ops = &nfs4_get_lease_time_ops,
4344 .callback_data = &data
4348 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4349 dprintk("--> %s\n", __func__);
4350 task = rpc_run_task(&task_setup);
4353 status = PTR_ERR(task);
4355 status = task->tk_status;
4358 dprintk("<-- %s return %d\n", __func__, status);
4363 /* Reset a slot table */
4364 static int nfs4_reset_slot_table(struct nfs4_session *session)
4366 struct nfs4_slot_table *tbl = &session->fc_slot_table;
4367 int i, max_slots = session->fc_attrs.max_reqs;
4368 int old_max_slots = session->fc_slot_table.max_slots;
4371 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__,
4372 session->fc_attrs.max_reqs, tbl);
4374 /* Until we have dynamic slot table adjustment, insist
4375 * upon the same slot table size */
4376 if (max_slots != old_max_slots) {
4377 dprintk("%s reset slot table does't match old\n",
4379 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4382 spin_lock(&tbl->slot_tbl_lock);
4383 for (i = 0; i < max_slots; ++i)
4384 tbl->slots[i].seq_nr = 1;
4385 tbl->highest_used_slotid = -1;
4386 spin_unlock(&tbl->slot_tbl_lock);
4387 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4388 tbl, tbl->slots, tbl->max_slots);
4390 dprintk("<-- %s: return %d\n", __func__, ret);
4395 * Initialize slot table
4397 static int nfs4_init_slot_table(struct nfs4_session *session)
4399 struct nfs4_slot_table *tbl = &session->fc_slot_table;
4400 int i, max_slots = session->fc_attrs.max_reqs;
4401 struct nfs4_slot *slot;
4404 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4406 dprintk("--> %s: max_reqs=%u\n", __func__,
4407 session->fc_attrs.max_reqs);
4409 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4412 for (i = 0; i < max_slots; ++i)
4416 spin_lock(&tbl->slot_tbl_lock);
4417 if (tbl->slots != NULL) {
4418 spin_unlock(&tbl->slot_tbl_lock);
4419 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4420 __func__, tbl, tbl->slots);
4424 tbl->max_slots = max_slots;
4426 tbl->highest_used_slotid = -1; /* no slot is currently used */
4427 spin_unlock(&tbl->slot_tbl_lock);
4428 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4429 tbl, tbl->slots, tbl->max_slots);
4431 dprintk("<-- %s: return %d\n", __func__, ret);
4438 /* Destroy the slot table */
4439 static void nfs4_destroy_slot_table(struct nfs4_session *session)
4441 if (session->fc_slot_table.slots == NULL)
4443 kfree(session->fc_slot_table.slots);
4444 session->fc_slot_table.slots = NULL;
4448 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4450 struct nfs4_session *session;
4451 struct nfs4_slot_table *tbl;
4453 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4457 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4459 * The create session reply races with the server back
4460 * channel probe. Mark the client NFS_CS_SESSION_INITING
4461 * so that the client back channel can find the
4464 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4466 tbl = &session->fc_slot_table;
4467 spin_lock_init(&tbl->slot_tbl_lock);
4468 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "Slot table");
4473 void nfs4_destroy_session(struct nfs4_session *session)
4475 nfs4_destroy_slot_table(session);
4480 * Initialize the values to be used by the client in CREATE_SESSION
4481 * If nfs4_init_session set the fore channel request and response sizes,
4484 * Set the back channel max_resp_sz_cached to zero to force the client to
4485 * always set csa_cachethis to FALSE because the current implementation
4486 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4488 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4490 struct nfs4_session *session = args->client->cl_session;
4491 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4492 mxresp_sz = session->fc_attrs.max_resp_sz;
4495 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4497 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4498 /* Fore channel attributes */
4499 args->fc_attrs.headerpadsz = 0;
4500 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4501 args->fc_attrs.max_resp_sz = mxresp_sz;
4502 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4503 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4504 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4506 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4507 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4509 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4510 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4511 args->fc_attrs.max_reqs);
4513 /* Back channel attributes */
4514 args->bc_attrs.headerpadsz = 0;
4515 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4516 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4517 args->bc_attrs.max_resp_sz_cached = 0;
4518 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4519 args->bc_attrs.max_reqs = 1;
4521 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4522 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4524 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4525 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4526 args->bc_attrs.max_reqs);
4529 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4533 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4534 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4538 #define _verify_fore_channel_attr(_name_) \
4539 _verify_channel_attr("fore", #_name_, \
4540 args->fc_attrs._name_, \
4541 session->fc_attrs._name_)
4543 #define _verify_back_channel_attr(_name_) \
4544 _verify_channel_attr("back", #_name_, \
4545 args->bc_attrs._name_, \
4546 session->bc_attrs._name_)
4549 * The server is not allowed to increase the fore channel header pad size,
4550 * maximum response size, or maximum number of operations.
4552 * The back channel attributes are only negotiatied down: We send what the
4553 * (back channel) server insists upon.
4555 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4556 struct nfs4_session *session)
4560 ret |= _verify_fore_channel_attr(headerpadsz);
4561 ret |= _verify_fore_channel_attr(max_resp_sz);
4562 ret |= _verify_fore_channel_attr(max_ops);
4564 ret |= _verify_back_channel_attr(headerpadsz);
4565 ret |= _verify_back_channel_attr(max_rqst_sz);
4566 ret |= _verify_back_channel_attr(max_resp_sz);
4567 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4568 ret |= _verify_back_channel_attr(max_ops);
4569 ret |= _verify_back_channel_attr(max_reqs);
4574 static int _nfs4_proc_create_session(struct nfs_client *clp)
4576 struct nfs4_session *session = clp->cl_session;
4577 struct nfs41_create_session_args args = {
4579 .cb_program = NFS4_CALLBACK,
4581 struct nfs41_create_session_res res = {
4584 struct rpc_message msg = {
4585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4591 nfs4_init_channel_attrs(&args);
4592 args.flags = (SESSION4_PERSIST);
4594 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4597 /* Verify the session's negotiated channel_attrs values */
4598 status = nfs4_verify_channel_attrs(&args, session);
4600 /* Increment the clientid slot sequence id */
4608 * Issues a CREATE_SESSION operation to the server.
4609 * It is the responsibility of the caller to verify the session is
4610 * expired before calling this routine.
4612 int nfs4_proc_create_session(struct nfs_client *clp, int reset)
4616 struct nfs_fsinfo fsinfo;
4617 struct nfs4_session *session = clp->cl_session;
4619 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4621 status = _nfs4_proc_create_session(clp);
4625 /* Init or reset the fore channel */
4627 status = nfs4_reset_slot_table(session);
4629 status = nfs4_init_slot_table(session);
4630 dprintk("fore channel slot table initialization returned %d\n", status);
4634 ptr = (unsigned *)&session->sess_id.data[0];
4635 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4636 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4639 /* Lease time is aleady set */
4642 /* Get the lease time */
4643 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4645 /* Update lease time and schedule renewal */
4646 spin_lock(&clp->cl_lock);
4647 clp->cl_lease_time = fsinfo.lease_time * HZ;
4648 clp->cl_last_renewal = jiffies;
4649 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4650 spin_unlock(&clp->cl_lock);
4652 nfs4_schedule_state_renewal(clp);
4655 dprintk("<-- %s\n", __func__);
4660 * Issue the over-the-wire RPC DESTROY_SESSION.
4661 * The caller must serialize access to this routine.
4663 int nfs4_proc_destroy_session(struct nfs4_session *session)
4666 struct rpc_message msg;
4668 dprintk("--> nfs4_proc_destroy_session\n");
4670 /* session is still being setup */
4671 if (session->clp->cl_cons_state != NFS_CS_READY)
4674 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4675 msg.rpc_argp = session;
4676 msg.rpc_resp = NULL;
4677 msg.rpc_cred = NULL;
4678 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4682 "Got error %d from the server on DESTROY_SESSION. "
4683 "Session has been destroyed regardless...\n", status);
4685 dprintk("<-- nfs4_proc_destroy_session\n");
4690 * Renew the cl_session lease.
4692 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4694 struct nfs4_sequence_args args;
4695 struct nfs4_sequence_res res;
4697 struct rpc_message msg = {
4698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4704 args.sa_cache_this = 0;
4706 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4710 void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4712 struct nfs_client *clp = (struct nfs_client *)data;
4714 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4716 if (task->tk_status < 0) {
4717 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4719 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4721 nfs4_restart_rpc(task, clp);
4725 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4726 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4728 put_rpccred(task->tk_msg.rpc_cred);
4729 kfree(task->tk_msg.rpc_argp);
4730 kfree(task->tk_msg.rpc_resp);
4732 dprintk("<-- %s\n", __func__);
4735 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4737 struct nfs_client *clp;
4738 struct nfs4_sequence_args *args;
4739 struct nfs4_sequence_res *res;
4741 clp = (struct nfs_client *)data;
4742 args = task->tk_msg.rpc_argp;
4743 res = task->tk_msg.rpc_resp;
4745 if (nfs4_setup_sequence(clp, args, res, 0, task))
4747 rpc_call_start(task);
4750 static const struct rpc_call_ops nfs41_sequence_ops = {
4751 .rpc_call_done = nfs41_sequence_call_done,
4752 .rpc_call_prepare = nfs41_sequence_prepare,
4755 static int nfs41_proc_async_sequence(struct nfs_client *clp,
4756 struct rpc_cred *cred)
4758 struct nfs4_sequence_args *args;
4759 struct nfs4_sequence_res *res;
4760 struct rpc_message msg = {
4761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4765 args = kzalloc(sizeof(*args), GFP_KERNEL);
4768 res = kzalloc(sizeof(*res), GFP_KERNEL);
4773 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4774 msg.rpc_argp = args;
4777 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4778 &nfs41_sequence_ops, (void *)clp);
4781 #endif /* CONFIG_NFS_V4_1 */
4783 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
4784 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4785 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4786 .recover_open = nfs4_open_reclaim,
4787 .recover_lock = nfs4_lock_reclaim,
4788 .establish_clid = nfs4_init_clientid,
4789 .get_clid_cred = nfs4_get_setclientid_cred,
4792 #if defined(CONFIG_NFS_V4_1)
4793 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4794 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4795 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4796 .recover_open = nfs4_open_reclaim,
4797 .recover_lock = nfs4_lock_reclaim,
4798 .establish_clid = nfs4_proc_exchange_id,
4800 #endif /* CONFIG_NFS_V4_1 */
4802 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4803 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4804 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4805 .recover_open = nfs4_open_expired,
4806 .recover_lock = nfs4_lock_expired,
4807 .establish_clid = nfs4_init_clientid,
4808 .get_clid_cred = nfs4_get_setclientid_cred,
4811 #if defined(CONFIG_NFS_V4_1)
4812 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
4813 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4814 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4815 .recover_open = nfs4_open_expired,
4816 .recover_lock = nfs4_lock_expired,
4817 .establish_clid = nfs4_proc_exchange_id,
4819 #endif /* CONFIG_NFS_V4_1 */
4821 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4822 .sched_state_renewal = nfs4_proc_async_renew,
4823 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
4824 .renew_lease = nfs4_proc_renew,
4827 #if defined(CONFIG_NFS_V4_1)
4828 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
4829 .sched_state_renewal = nfs41_proc_async_sequence,
4830 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
4831 .renew_lease = nfs4_proc_sequence,
4836 * Per minor version reboot and network partition recovery ops
4839 struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
4840 &nfs40_reboot_recovery_ops,
4841 #if defined(CONFIG_NFS_V4_1)
4842 &nfs41_reboot_recovery_ops,
4846 struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
4847 &nfs40_nograce_recovery_ops,
4848 #if defined(CONFIG_NFS_V4_1)
4849 &nfs41_nograce_recovery_ops,
4853 struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
4854 &nfs40_state_renewal_ops,
4855 #if defined(CONFIG_NFS_V4_1)
4856 &nfs41_state_renewal_ops,
4860 static const struct inode_operations nfs4_file_inode_operations = {
4861 .permission = nfs_permission,
4862 .getattr = nfs_getattr,
4863 .setattr = nfs_setattr,
4864 .getxattr = nfs4_getxattr,
4865 .setxattr = nfs4_setxattr,
4866 .listxattr = nfs4_listxattr,
4869 const struct nfs_rpc_ops nfs_v4_clientops = {
4870 .version = 4, /* protocol version */
4871 .dentry_ops = &nfs4_dentry_operations,
4872 .dir_inode_ops = &nfs4_dir_inode_operations,
4873 .file_inode_ops = &nfs4_file_inode_operations,
4874 .getroot = nfs4_proc_get_root,
4875 .getattr = nfs4_proc_getattr,
4876 .setattr = nfs4_proc_setattr,
4877 .lookupfh = nfs4_proc_lookupfh,
4878 .lookup = nfs4_proc_lookup,
4879 .access = nfs4_proc_access,
4880 .readlink = nfs4_proc_readlink,
4881 .create = nfs4_proc_create,
4882 .remove = nfs4_proc_remove,
4883 .unlink_setup = nfs4_proc_unlink_setup,
4884 .unlink_done = nfs4_proc_unlink_done,
4885 .rename = nfs4_proc_rename,
4886 .link = nfs4_proc_link,
4887 .symlink = nfs4_proc_symlink,
4888 .mkdir = nfs4_proc_mkdir,
4889 .rmdir = nfs4_proc_remove,
4890 .readdir = nfs4_proc_readdir,
4891 .mknod = nfs4_proc_mknod,
4892 .statfs = nfs4_proc_statfs,
4893 .fsinfo = nfs4_proc_fsinfo,
4894 .pathconf = nfs4_proc_pathconf,
4895 .set_capabilities = nfs4_server_capabilities,
4896 .decode_dirent = nfs4_decode_dirent,
4897 .read_setup = nfs4_proc_read_setup,
4898 .read_done = nfs4_read_done,
4899 .write_setup = nfs4_proc_write_setup,
4900 .write_done = nfs4_write_done,
4901 .commit_setup = nfs4_proc_commit_setup,
4902 .commit_done = nfs4_commit_done,
4903 .lock = nfs4_proc_lock,
4904 .clear_acl_cache = nfs4_zap_acl_attr,
4905 .close_context = nfs4_close_context,