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>
52 #include <linux/sunrpc/bc_xprt.h>
55 #include "delegation.h"
60 #define NFSDBG_FACILITY NFSDBG_PROC
62 #define NFS4_POLL_RETRY_MIN (HZ/10)
63 #define NFS4_POLL_RETRY_MAX (15*HZ)
66 static int _nfs4_proc_open(struct nfs4_opendata *data);
67 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
68 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
69 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
70 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
72 /* Prevent leaks of NFSv4 errors into userland */
73 static int nfs4_map_errors(int err)
76 dprintk("%s could not handle NFSv4 error %d\n",
84 * This is our standard bitmap for GETATTR requests.
86 const u32 nfs4_fattr_bitmap[2] = {
91 | FATTR4_WORD0_FILEID,
93 | FATTR4_WORD1_NUMLINKS
95 | FATTR4_WORD1_OWNER_GROUP
97 | FATTR4_WORD1_SPACE_USED
98 | FATTR4_WORD1_TIME_ACCESS
99 | FATTR4_WORD1_TIME_METADATA
100 | FATTR4_WORD1_TIME_MODIFY
103 const u32 nfs4_statfs_bitmap[2] = {
104 FATTR4_WORD0_FILES_AVAIL
105 | FATTR4_WORD0_FILES_FREE
106 | FATTR4_WORD0_FILES_TOTAL,
107 FATTR4_WORD1_SPACE_AVAIL
108 | FATTR4_WORD1_SPACE_FREE
109 | FATTR4_WORD1_SPACE_TOTAL
112 const u32 nfs4_pathconf_bitmap[2] = {
114 | FATTR4_WORD0_MAXNAME,
118 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
119 | FATTR4_WORD0_MAXREAD
120 | FATTR4_WORD0_MAXWRITE
121 | FATTR4_WORD0_LEASE_TIME,
125 const u32 nfs4_fs_locations_bitmap[2] = {
127 | FATTR4_WORD0_CHANGE
130 | FATTR4_WORD0_FILEID
131 | FATTR4_WORD0_FS_LOCATIONS,
133 | FATTR4_WORD1_NUMLINKS
135 | FATTR4_WORD1_OWNER_GROUP
136 | FATTR4_WORD1_RAWDEV
137 | FATTR4_WORD1_SPACE_USED
138 | FATTR4_WORD1_TIME_ACCESS
139 | FATTR4_WORD1_TIME_METADATA
140 | FATTR4_WORD1_TIME_MODIFY
141 | FATTR4_WORD1_MOUNTED_ON_FILEID
144 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
145 struct nfs4_readdir_arg *readdir)
149 BUG_ON(readdir->count < 80);
151 readdir->cookie = cookie;
152 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
157 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
162 * NFSv4 servers do not return entries for '.' and '..'
163 * Therefore, we fake these entries here. We let '.'
164 * have cookie 0 and '..' have cookie 1. Note that
165 * when talking to the server, we always send cookie 0
168 start = p = kmap_atomic(*readdir->pages, KM_USER0);
171 *p++ = xdr_one; /* next */
172 *p++ = xdr_zero; /* cookie, first word */
173 *p++ = xdr_one; /* cookie, second word */
174 *p++ = xdr_one; /* entry len */
175 memcpy(p, ".\0\0\0", 4); /* entry */
177 *p++ = xdr_one; /* bitmap length */
178 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
179 *p++ = htonl(8); /* attribute buffer length */
180 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
183 *p++ = xdr_one; /* next */
184 *p++ = xdr_zero; /* cookie, first word */
185 *p++ = xdr_two; /* cookie, second word */
186 *p++ = xdr_two; /* entry len */
187 memcpy(p, "..\0\0", 4); /* entry */
189 *p++ = xdr_one; /* bitmap length */
190 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
191 *p++ = htonl(8); /* attribute buffer length */
192 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
194 readdir->pgbase = (char *)p - (char *)start;
195 readdir->count -= readdir->pgbase;
196 kunmap_atomic(start, KM_USER0);
199 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
205 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
206 nfs_wait_bit_killable, TASK_KILLABLE);
210 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
217 *timeout = NFS4_POLL_RETRY_MIN;
218 if (*timeout > NFS4_POLL_RETRY_MAX)
219 *timeout = NFS4_POLL_RETRY_MAX;
220 schedule_timeout_killable(*timeout);
221 if (fatal_signal_pending(current))
227 /* This is the error handling routine for processes that are allowed
230 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
232 struct nfs_client *clp = server->nfs_client;
233 struct nfs4_state *state = exception->state;
236 exception->retry = 0;
240 case -NFS4ERR_ADMIN_REVOKED:
241 case -NFS4ERR_BAD_STATEID:
242 case -NFS4ERR_OPENMODE:
245 nfs4_state_mark_reclaim_nograce(clp, state);
246 case -NFS4ERR_STALE_CLIENTID:
247 case -NFS4ERR_STALE_STATEID:
248 case -NFS4ERR_EXPIRED:
249 nfs4_schedule_state_recovery(clp);
250 ret = nfs4_wait_clnt_recover(clp);
252 exception->retry = 1;
253 #if !defined(CONFIG_NFS_V4_1)
255 #else /* !defined(CONFIG_NFS_V4_1) */
256 if (!nfs4_has_session(server->nfs_client))
259 case -NFS4ERR_BADSESSION:
260 case -NFS4ERR_BADSLOT:
261 case -NFS4ERR_BAD_HIGH_SLOT:
262 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
263 case -NFS4ERR_DEADSESSION:
264 case -NFS4ERR_SEQ_FALSE_RETRY:
265 case -NFS4ERR_SEQ_MISORDERED:
266 dprintk("%s ERROR: %d Reset session\n", __func__,
268 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
269 exception->retry = 1;
271 #endif /* !defined(CONFIG_NFS_V4_1) */
272 case -NFS4ERR_FILE_OPEN:
275 ret = nfs4_delay(server->client, &exception->timeout);
278 case -NFS4ERR_OLD_STATEID:
279 exception->retry = 1;
281 /* We failed to handle the error */
282 return nfs4_map_errors(ret);
286 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
288 struct nfs_client *clp = server->nfs_client;
289 spin_lock(&clp->cl_lock);
290 if (time_before(clp->cl_last_renewal,timestamp))
291 clp->cl_last_renewal = timestamp;
292 spin_unlock(&clp->cl_lock);
295 #if defined(CONFIG_NFS_V4_1)
298 * nfs4_free_slot - free a slot and efficiently update slot table.
300 * freeing a slot is trivially done by clearing its respective bit
302 * If the freed slotid equals highest_used_slotid we want to update it
303 * so that the server would be able to size down the slot table if needed,
304 * otherwise we know that the highest_used_slotid is still in use.
305 * When updating highest_used_slotid there may be "holes" in the bitmap
306 * so we need to scan down from highest_used_slotid to 0 looking for the now
307 * highest slotid in use.
308 * If none found, highest_used_slotid is set to -1.
311 nfs4_free_slot(struct nfs4_slot_table *tbl, u8 free_slotid)
313 int slotid = free_slotid;
315 spin_lock(&tbl->slot_tbl_lock);
316 /* clear used bit in bitmap */
317 __clear_bit(slotid, tbl->used_slots);
319 /* update highest_used_slotid when it is freed */
320 if (slotid == tbl->highest_used_slotid) {
321 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
322 if (slotid >= 0 && slotid < tbl->max_slots)
323 tbl->highest_used_slotid = slotid;
325 tbl->highest_used_slotid = -1;
327 rpc_wake_up_next(&tbl->slot_tbl_waitq);
328 spin_unlock(&tbl->slot_tbl_lock);
329 dprintk("%s: free_slotid %u highest_used_slotid %d\n", __func__,
330 free_slotid, tbl->highest_used_slotid);
333 void nfs41_sequence_free_slot(const struct nfs_client *clp,
334 struct nfs4_sequence_res *res)
336 struct nfs4_slot_table *tbl;
338 if (!nfs4_has_session(clp)) {
339 dprintk("%s: No session\n", __func__);
342 tbl = &clp->cl_session->fc_slot_table;
343 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE) {
344 dprintk("%s: No slot\n", __func__);
345 /* just wake up the next guy waiting since
346 * we may have not consumed a slot after all */
347 rpc_wake_up_next(&tbl->slot_tbl_waitq);
350 nfs4_free_slot(tbl, res->sr_slotid);
351 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
354 static void nfs41_sequence_done(struct nfs_client *clp,
355 struct nfs4_sequence_res *res,
358 unsigned long timestamp;
359 struct nfs4_slot_table *tbl;
360 struct nfs4_slot *slot;
363 * sr_status remains 1 if an RPC level error occurred. The server
364 * may or may not have processed the sequence operation..
365 * Proceed as if the server received and processed the sequence
368 if (res->sr_status == 1)
369 res->sr_status = NFS_OK;
371 /* -ERESTARTSYS can result in skipping nfs41_sequence_setup */
372 if (res->sr_slotid == NFS4_MAX_SLOT_TABLE)
375 tbl = &clp->cl_session->fc_slot_table;
376 slot = tbl->slots + res->sr_slotid;
378 if (res->sr_status == 0) {
379 /* Update the slot's sequence and clientid lease timer */
381 timestamp = res->sr_renewal_time;
382 spin_lock(&clp->cl_lock);
383 if (time_before(clp->cl_last_renewal, timestamp))
384 clp->cl_last_renewal = timestamp;
385 spin_unlock(&clp->cl_lock);
389 /* The session may be reset by one of the error handlers. */
390 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
391 nfs41_sequence_free_slot(clp, res);
395 * nfs4_find_slot - efficiently look for a free slot
397 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
398 * If found, we mark the slot as used, update the highest_used_slotid,
399 * and respectively set up the sequence operation args.
400 * The slot number is returned if found, or NFS4_MAX_SLOT_TABLE otherwise.
402 * Note: must be called with under the slot_tbl_lock.
405 nfs4_find_slot(struct nfs4_slot_table *tbl, struct rpc_task *task)
408 u8 ret_id = NFS4_MAX_SLOT_TABLE;
409 BUILD_BUG_ON((u8)NFS4_MAX_SLOT_TABLE != (int)NFS4_MAX_SLOT_TABLE);
411 dprintk("--> %s used_slots=%04lx highest_used=%d max_slots=%d\n",
412 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
414 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
415 if (slotid >= tbl->max_slots)
417 __set_bit(slotid, tbl->used_slots);
418 if (slotid > tbl->highest_used_slotid)
419 tbl->highest_used_slotid = slotid;
422 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
423 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
427 static int nfs4_recover_session(struct nfs4_session *session)
429 struct nfs_client *clp = session->clp;
433 ret = nfs4_wait_clnt_recover(clp);
436 if (!test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state))
438 nfs4_schedule_state_manager(clp);
443 static int nfs41_setup_sequence(struct nfs4_session *session,
444 struct nfs4_sequence_args *args,
445 struct nfs4_sequence_res *res,
447 struct rpc_task *task)
449 struct nfs4_slot *slot;
450 struct nfs4_slot_table *tbl;
454 dprintk("--> %s\n", __func__);
455 /* slot already allocated? */
456 if (res->sr_slotid != NFS4_MAX_SLOT_TABLE)
459 memset(res, 0, sizeof(*res));
460 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
461 tbl = &session->fc_slot_table;
463 spin_lock(&tbl->slot_tbl_lock);
464 if (test_bit(NFS4CLNT_SESSION_SETUP, &session->clp->cl_state)) {
465 if (tbl->highest_used_slotid != -1) {
466 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
467 spin_unlock(&tbl->slot_tbl_lock);
468 dprintk("<-- %s: Session reset: draining\n", __func__);
472 /* The slot table is empty; start the reset thread */
473 dprintk("%s Session Reset\n", __func__);
474 spin_unlock(&tbl->slot_tbl_lock);
475 status = nfs4_recover_session(session);
478 spin_lock(&tbl->slot_tbl_lock);
481 slotid = nfs4_find_slot(tbl, task);
482 if (slotid == NFS4_MAX_SLOT_TABLE) {
483 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
484 spin_unlock(&tbl->slot_tbl_lock);
485 dprintk("<-- %s: no free slots\n", __func__);
488 spin_unlock(&tbl->slot_tbl_lock);
490 slot = tbl->slots + slotid;
491 args->sa_session = session;
492 args->sa_slotid = slotid;
493 args->sa_cache_this = cache_reply;
495 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
497 res->sr_session = session;
498 res->sr_slotid = slotid;
499 res->sr_renewal_time = jiffies;
501 * sr_status is only set in decode_sequence, and so will remain
502 * set to 1 if an rpc level failure occurs.
508 int nfs4_setup_sequence(struct nfs_client *clp,
509 struct nfs4_sequence_args *args,
510 struct nfs4_sequence_res *res,
512 struct rpc_task *task)
516 dprintk("--> %s clp %p session %p sr_slotid %d\n",
517 __func__, clp, clp->cl_session, res->sr_slotid);
519 if (!nfs4_has_session(clp))
521 ret = nfs41_setup_sequence(clp->cl_session, args, res, cache_reply,
523 if (ret != -EAGAIN) {
524 /* terminate rpc task */
525 task->tk_status = ret;
526 task->tk_action = NULL;
529 dprintk("<-- %s status=%d\n", __func__, ret);
533 struct nfs41_call_sync_data {
534 struct nfs_client *clp;
535 struct nfs4_sequence_args *seq_args;
536 struct nfs4_sequence_res *seq_res;
540 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
542 struct nfs41_call_sync_data *data = calldata;
544 dprintk("--> %s data->clp->cl_session %p\n", __func__,
545 data->clp->cl_session);
546 if (nfs4_setup_sequence(data->clp, data->seq_args,
547 data->seq_res, data->cache_reply, task))
549 rpc_call_start(task);
552 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
554 struct nfs41_call_sync_data *data = calldata;
556 nfs41_sequence_done(data->clp, data->seq_res, task->tk_status);
557 nfs41_sequence_free_slot(data->clp, data->seq_res);
560 struct rpc_call_ops nfs41_call_sync_ops = {
561 .rpc_call_prepare = nfs41_call_sync_prepare,
562 .rpc_call_done = nfs41_call_sync_done,
565 static int nfs4_call_sync_sequence(struct nfs_client *clp,
566 struct rpc_clnt *clnt,
567 struct rpc_message *msg,
568 struct nfs4_sequence_args *args,
569 struct nfs4_sequence_res *res,
573 struct rpc_task *task;
574 struct nfs41_call_sync_data data = {
578 .cache_reply = cache_reply,
580 struct rpc_task_setup task_setup = {
583 .callback_ops = &nfs41_call_sync_ops,
584 .callback_data = &data
587 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
588 task = rpc_run_task(&task_setup);
592 ret = task->tk_status;
598 int _nfs4_call_sync_session(struct nfs_server *server,
599 struct rpc_message *msg,
600 struct nfs4_sequence_args *args,
601 struct nfs4_sequence_res *res,
604 return nfs4_call_sync_sequence(server->nfs_client, server->client,
605 msg, args, res, cache_reply);
608 #endif /* CONFIG_NFS_V4_1 */
610 int _nfs4_call_sync(struct nfs_server *server,
611 struct rpc_message *msg,
612 struct nfs4_sequence_args *args,
613 struct nfs4_sequence_res *res,
616 args->sa_session = res->sr_session = NULL;
617 return rpc_call_sync(server->client, msg, 0);
620 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
621 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
622 &(res)->seq_res, (cache_reply))
624 static void nfs4_sequence_done(const struct nfs_server *server,
625 struct nfs4_sequence_res *res, int rpc_status)
627 #ifdef CONFIG_NFS_V4_1
628 if (nfs4_has_session(server->nfs_client))
629 nfs41_sequence_done(server->nfs_client, res, rpc_status);
630 #endif /* CONFIG_NFS_V4_1 */
633 /* no restart, therefore free slot here */
634 static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
635 struct nfs4_sequence_res *res,
638 nfs4_sequence_done(server, res, rpc_status);
639 nfs4_sequence_free_slot(server->nfs_client, res);
642 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
644 struct nfs_inode *nfsi = NFS_I(dir);
646 spin_lock(&dir->i_lock);
647 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
648 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
649 nfs_force_lookup_revalidate(dir);
650 nfsi->change_attr = cinfo->after;
651 spin_unlock(&dir->i_lock);
654 struct nfs4_opendata {
656 struct nfs_openargs o_arg;
657 struct nfs_openres o_res;
658 struct nfs_open_confirmargs c_arg;
659 struct nfs_open_confirmres c_res;
660 struct nfs_fattr f_attr;
661 struct nfs_fattr dir_attr;
664 struct nfs4_state_owner *owner;
665 struct nfs4_state *state;
667 unsigned long timestamp;
668 unsigned int rpc_done : 1;
674 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
676 p->o_res.f_attr = &p->f_attr;
677 p->o_res.dir_attr = &p->dir_attr;
678 p->o_res.seqid = p->o_arg.seqid;
679 p->c_res.seqid = p->c_arg.seqid;
680 p->o_res.server = p->o_arg.server;
681 nfs_fattr_init(&p->f_attr);
682 nfs_fattr_init(&p->dir_attr);
683 p->o_res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
686 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
687 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
688 const struct iattr *attrs)
690 struct dentry *parent = dget_parent(path->dentry);
691 struct inode *dir = parent->d_inode;
692 struct nfs_server *server = NFS_SERVER(dir);
693 struct nfs4_opendata *p;
695 p = kzalloc(sizeof(*p), GFP_KERNEL);
698 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
699 if (p->o_arg.seqid == NULL)
701 p->path.mnt = mntget(path->mnt);
702 p->path.dentry = dget(path->dentry);
705 atomic_inc(&sp->so_count);
706 p->o_arg.fh = NFS_FH(dir);
707 p->o_arg.open_flags = flags;
708 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
709 p->o_arg.clientid = server->nfs_client->cl_clientid;
710 p->o_arg.id = sp->so_owner_id.id;
711 p->o_arg.name = &p->path.dentry->d_name;
712 p->o_arg.server = server;
713 p->o_arg.bitmask = server->attr_bitmask;
714 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
715 if (flags & O_EXCL) {
716 u32 *s = (u32 *) p->o_arg.u.verifier.data;
719 } else if (flags & O_CREAT) {
720 p->o_arg.u.attrs = &p->attrs;
721 memcpy(&p->attrs, attrs, sizeof(p->attrs));
723 p->c_arg.fh = &p->o_res.fh;
724 p->c_arg.stateid = &p->o_res.stateid;
725 p->c_arg.seqid = p->o_arg.seqid;
726 nfs4_init_opendata_res(p);
736 static void nfs4_opendata_free(struct kref *kref)
738 struct nfs4_opendata *p = container_of(kref,
739 struct nfs4_opendata, kref);
741 nfs_free_seqid(p->o_arg.seqid);
742 if (p->state != NULL)
743 nfs4_put_open_state(p->state);
744 nfs4_put_state_owner(p->owner);
750 static void nfs4_opendata_put(struct nfs4_opendata *p)
753 kref_put(&p->kref, nfs4_opendata_free);
756 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
760 ret = rpc_wait_for_completion_task(task);
764 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
768 if (open_mode & O_EXCL)
770 switch (mode & (FMODE_READ|FMODE_WRITE)) {
772 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
775 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
777 case FMODE_READ|FMODE_WRITE:
778 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
784 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
786 if ((delegation->type & fmode) != fmode)
788 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
790 nfs_mark_delegation_referenced(delegation);
794 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
803 case FMODE_READ|FMODE_WRITE:
806 nfs4_state_set_mode_locked(state, state->state | fmode);
809 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
811 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
812 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
813 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
816 set_bit(NFS_O_RDONLY_STATE, &state->flags);
819 set_bit(NFS_O_WRONLY_STATE, &state->flags);
821 case FMODE_READ|FMODE_WRITE:
822 set_bit(NFS_O_RDWR_STATE, &state->flags);
826 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
828 write_seqlock(&state->seqlock);
829 nfs_set_open_stateid_locked(state, stateid, fmode);
830 write_sequnlock(&state->seqlock);
833 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
836 * Protect the call to nfs4_state_set_mode_locked and
837 * serialise the stateid update
839 write_seqlock(&state->seqlock);
840 if (deleg_stateid != NULL) {
841 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
842 set_bit(NFS_DELEGATED_STATE, &state->flags);
844 if (open_stateid != NULL)
845 nfs_set_open_stateid_locked(state, open_stateid, fmode);
846 write_sequnlock(&state->seqlock);
847 spin_lock(&state->owner->so_lock);
848 update_open_stateflags(state, fmode);
849 spin_unlock(&state->owner->so_lock);
852 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
854 struct nfs_inode *nfsi = NFS_I(state->inode);
855 struct nfs_delegation *deleg_cur;
858 fmode &= (FMODE_READ|FMODE_WRITE);
861 deleg_cur = rcu_dereference(nfsi->delegation);
862 if (deleg_cur == NULL)
865 spin_lock(&deleg_cur->lock);
866 if (nfsi->delegation != deleg_cur ||
867 (deleg_cur->type & fmode) != fmode)
868 goto no_delegation_unlock;
870 if (delegation == NULL)
871 delegation = &deleg_cur->stateid;
872 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
873 goto no_delegation_unlock;
875 nfs_mark_delegation_referenced(deleg_cur);
876 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
878 no_delegation_unlock:
879 spin_unlock(&deleg_cur->lock);
883 if (!ret && open_stateid != NULL) {
884 __update_open_stateid(state, open_stateid, NULL, fmode);
892 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
894 struct nfs_delegation *delegation;
897 delegation = rcu_dereference(NFS_I(inode)->delegation);
898 if (delegation == NULL || (delegation->type & fmode) == fmode) {
903 nfs_inode_return_delegation(inode);
906 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
908 struct nfs4_state *state = opendata->state;
909 struct nfs_inode *nfsi = NFS_I(state->inode);
910 struct nfs_delegation *delegation;
911 int open_mode = opendata->o_arg.open_flags & O_EXCL;
912 fmode_t fmode = opendata->o_arg.fmode;
913 nfs4_stateid stateid;
917 if (can_open_cached(state, fmode, open_mode)) {
918 spin_lock(&state->owner->so_lock);
919 if (can_open_cached(state, fmode, open_mode)) {
920 update_open_stateflags(state, fmode);
921 spin_unlock(&state->owner->so_lock);
922 goto out_return_state;
924 spin_unlock(&state->owner->so_lock);
927 delegation = rcu_dereference(nfsi->delegation);
928 if (delegation == NULL ||
929 !can_open_delegated(delegation, fmode)) {
933 /* Save the delegation */
934 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
936 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
941 /* Try to update the stateid using the delegation */
942 if (update_open_stateid(state, NULL, &stateid, fmode))
943 goto out_return_state;
948 atomic_inc(&state->count);
952 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
955 struct nfs4_state *state = NULL;
956 struct nfs_delegation *delegation;
959 if (!data->rpc_done) {
960 state = nfs4_try_open_cached(data);
965 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
967 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
968 ret = PTR_ERR(inode);
972 state = nfs4_get_open_state(inode, data->owner);
975 if (data->o_res.delegation_type != 0) {
976 int delegation_flags = 0;
979 delegation = rcu_dereference(NFS_I(inode)->delegation);
981 delegation_flags = delegation->flags;
983 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
984 nfs_inode_set_delegation(state->inode,
985 data->owner->so_cred,
988 nfs_inode_reclaim_delegation(state->inode,
989 data->owner->so_cred,
993 update_open_stateid(state, &data->o_res.stateid, NULL,
1001 return ERR_PTR(ret);
1004 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1006 struct nfs_inode *nfsi = NFS_I(state->inode);
1007 struct nfs_open_context *ctx;
1009 spin_lock(&state->inode->i_lock);
1010 list_for_each_entry(ctx, &nfsi->open_files, list) {
1011 if (ctx->state != state)
1013 get_nfs_open_context(ctx);
1014 spin_unlock(&state->inode->i_lock);
1017 spin_unlock(&state->inode->i_lock);
1018 return ERR_PTR(-ENOENT);
1021 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1023 struct nfs4_opendata *opendata;
1025 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, 0, NULL);
1026 if (opendata == NULL)
1027 return ERR_PTR(-ENOMEM);
1028 opendata->state = state;
1029 atomic_inc(&state->count);
1033 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1035 struct nfs4_state *newstate;
1038 opendata->o_arg.open_flags = 0;
1039 opendata->o_arg.fmode = fmode;
1040 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1041 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1042 nfs4_init_opendata_res(opendata);
1043 ret = _nfs4_proc_open(opendata);
1046 newstate = nfs4_opendata_to_nfs4_state(opendata);
1047 if (IS_ERR(newstate))
1048 return PTR_ERR(newstate);
1049 nfs4_close_state(&opendata->path, newstate, fmode);
1054 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1056 struct nfs4_state *newstate;
1059 /* memory barrier prior to reading state->n_* */
1060 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1062 if (state->n_rdwr != 0) {
1063 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1066 if (newstate != state)
1069 if (state->n_wronly != 0) {
1070 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1073 if (newstate != state)
1076 if (state->n_rdonly != 0) {
1077 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1080 if (newstate != state)
1084 * We may have performed cached opens for all three recoveries.
1085 * Check if we need to update the current stateid.
1087 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1088 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
1089 write_seqlock(&state->seqlock);
1090 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1091 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
1092 write_sequnlock(&state->seqlock);
1099 * reclaim state on the server after a reboot.
1101 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1103 struct nfs_delegation *delegation;
1104 struct nfs4_opendata *opendata;
1105 fmode_t delegation_type = 0;
1108 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1109 if (IS_ERR(opendata))
1110 return PTR_ERR(opendata);
1111 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1112 opendata->o_arg.fh = NFS_FH(state->inode);
1114 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1115 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1116 delegation_type = delegation->type;
1118 opendata->o_arg.u.delegation_type = delegation_type;
1119 status = nfs4_open_recover(opendata, state);
1120 nfs4_opendata_put(opendata);
1124 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1126 struct nfs_server *server = NFS_SERVER(state->inode);
1127 struct nfs4_exception exception = { };
1130 err = _nfs4_do_open_reclaim(ctx, state);
1131 if (err != -NFS4ERR_DELAY)
1133 nfs4_handle_exception(server, err, &exception);
1134 } while (exception.retry);
1138 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1140 struct nfs_open_context *ctx;
1143 ctx = nfs4_state_find_open_context(state);
1145 return PTR_ERR(ctx);
1146 ret = nfs4_do_open_reclaim(ctx, state);
1147 put_nfs_open_context(ctx);
1151 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1153 struct nfs4_opendata *opendata;
1156 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1157 if (IS_ERR(opendata))
1158 return PTR_ERR(opendata);
1159 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1160 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
1161 sizeof(opendata->o_arg.u.delegation.data));
1162 ret = nfs4_open_recover(opendata, state);
1163 nfs4_opendata_put(opendata);
1167 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1169 struct nfs4_exception exception = { };
1170 struct nfs_server *server = NFS_SERVER(state->inode);
1173 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1179 case -NFS4ERR_STALE_CLIENTID:
1180 case -NFS4ERR_STALE_STATEID:
1181 case -NFS4ERR_EXPIRED:
1182 /* Don't recall a delegation if it was lost */
1183 nfs4_schedule_state_recovery(server->nfs_client);
1187 * The show must go on: exit, but mark the
1188 * stateid as needing recovery.
1190 case -NFS4ERR_ADMIN_REVOKED:
1191 case -NFS4ERR_BAD_STATEID:
1192 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
1197 err = nfs4_handle_exception(server, err, &exception);
1198 } while (exception.retry);
1203 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1205 struct nfs4_opendata *data = calldata;
1207 data->rpc_status = task->tk_status;
1208 if (RPC_ASSASSINATED(task))
1210 if (data->rpc_status == 0) {
1211 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
1212 sizeof(data->o_res.stateid.data));
1213 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1214 renew_lease(data->o_res.server, data->timestamp);
1219 static void nfs4_open_confirm_release(void *calldata)
1221 struct nfs4_opendata *data = calldata;
1222 struct nfs4_state *state = NULL;
1224 /* If this request hasn't been cancelled, do nothing */
1225 if (data->cancelled == 0)
1227 /* In case of error, no cleanup! */
1228 if (!data->rpc_done)
1230 state = nfs4_opendata_to_nfs4_state(data);
1232 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1234 nfs4_opendata_put(data);
1237 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1238 .rpc_call_done = nfs4_open_confirm_done,
1239 .rpc_release = nfs4_open_confirm_release,
1243 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1245 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1247 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1248 struct rpc_task *task;
1249 struct rpc_message msg = {
1250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1251 .rpc_argp = &data->c_arg,
1252 .rpc_resp = &data->c_res,
1253 .rpc_cred = data->owner->so_cred,
1255 struct rpc_task_setup task_setup_data = {
1256 .rpc_client = server->client,
1257 .rpc_message = &msg,
1258 .callback_ops = &nfs4_open_confirm_ops,
1259 .callback_data = data,
1260 .workqueue = nfsiod_workqueue,
1261 .flags = RPC_TASK_ASYNC,
1265 kref_get(&data->kref);
1267 data->rpc_status = 0;
1268 data->timestamp = jiffies;
1269 task = rpc_run_task(&task_setup_data);
1271 return PTR_ERR(task);
1272 status = nfs4_wait_for_completion_rpc_task(task);
1274 data->cancelled = 1;
1277 status = data->rpc_status;
1282 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1284 struct nfs4_opendata *data = calldata;
1285 struct nfs4_state_owner *sp = data->owner;
1287 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1290 * Check if we still need to send an OPEN call, or if we can use
1291 * a delegation instead.
1293 if (data->state != NULL) {
1294 struct nfs_delegation *delegation;
1296 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1299 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1300 if (delegation != NULL &&
1301 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
1307 /* Update sequence id. */
1308 data->o_arg.id = sp->so_owner_id.id;
1309 data->o_arg.clientid = sp->so_client->cl_clientid;
1310 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1311 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1312 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1314 data->timestamp = jiffies;
1315 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
1316 &data->o_arg.seq_args,
1317 &data->o_res.seq_res, 1, task))
1319 rpc_call_start(task);
1322 task->tk_action = NULL;
1326 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1328 struct nfs4_opendata *data = calldata;
1330 data->rpc_status = task->tk_status;
1332 nfs4_sequence_done_free_slot(data->o_arg.server, &data->o_res.seq_res,
1335 if (RPC_ASSASSINATED(task))
1337 if (task->tk_status == 0) {
1338 switch (data->o_res.f_attr->mode & S_IFMT) {
1342 data->rpc_status = -ELOOP;
1345 data->rpc_status = -EISDIR;
1348 data->rpc_status = -ENOTDIR;
1350 renew_lease(data->o_res.server, data->timestamp);
1351 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1352 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1357 static void nfs4_open_release(void *calldata)
1359 struct nfs4_opendata *data = calldata;
1360 struct nfs4_state *state = NULL;
1362 /* If this request hasn't been cancelled, do nothing */
1363 if (data->cancelled == 0)
1365 /* In case of error, no cleanup! */
1366 if (data->rpc_status != 0 || !data->rpc_done)
1368 /* In case we need an open_confirm, no cleanup! */
1369 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1371 state = nfs4_opendata_to_nfs4_state(data);
1373 nfs4_close_state(&data->path, state, data->o_arg.fmode);
1375 nfs4_opendata_put(data);
1378 static const struct rpc_call_ops nfs4_open_ops = {
1379 .rpc_call_prepare = nfs4_open_prepare,
1380 .rpc_call_done = nfs4_open_done,
1381 .rpc_release = nfs4_open_release,
1385 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1387 static int _nfs4_proc_open(struct nfs4_opendata *data)
1389 struct inode *dir = data->dir->d_inode;
1390 struct nfs_server *server = NFS_SERVER(dir);
1391 struct nfs_openargs *o_arg = &data->o_arg;
1392 struct nfs_openres *o_res = &data->o_res;
1393 struct rpc_task *task;
1394 struct rpc_message msg = {
1395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1398 .rpc_cred = data->owner->so_cred,
1400 struct rpc_task_setup task_setup_data = {
1401 .rpc_client = server->client,
1402 .rpc_message = &msg,
1403 .callback_ops = &nfs4_open_ops,
1404 .callback_data = data,
1405 .workqueue = nfsiod_workqueue,
1406 .flags = RPC_TASK_ASYNC,
1410 kref_get(&data->kref);
1412 data->rpc_status = 0;
1413 data->cancelled = 0;
1414 task = rpc_run_task(&task_setup_data);
1416 return PTR_ERR(task);
1417 status = nfs4_wait_for_completion_rpc_task(task);
1419 data->cancelled = 1;
1422 status = data->rpc_status;
1424 if (status != 0 || !data->rpc_done)
1427 if (o_res->fh.size == 0)
1428 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1430 if (o_arg->open_flags & O_CREAT) {
1431 update_changeattr(dir, &o_res->cinfo);
1432 nfs_post_op_update_inode(dir, o_res->dir_attr);
1434 nfs_refresh_inode(dir, o_res->dir_attr);
1435 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1436 status = _nfs4_proc_open_confirm(data);
1440 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1441 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1445 static int nfs4_recover_expired_lease(struct nfs_server *server)
1447 struct nfs_client *clp = server->nfs_client;
1451 ret = nfs4_wait_clnt_recover(clp);
1454 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1455 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1457 nfs4_schedule_state_recovery(clp);
1464 * reclaim state on the server after a network partition.
1465 * Assumes caller holds the appropriate lock
1467 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1469 struct nfs4_opendata *opendata;
1472 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1473 if (IS_ERR(opendata))
1474 return PTR_ERR(opendata);
1475 ret = nfs4_open_recover(opendata, state);
1477 d_drop(ctx->path.dentry);
1478 nfs4_opendata_put(opendata);
1482 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1484 struct nfs_server *server = NFS_SERVER(state->inode);
1485 struct nfs4_exception exception = { };
1489 err = _nfs4_open_expired(ctx, state);
1490 if (err != -NFS4ERR_DELAY)
1492 nfs4_handle_exception(server, err, &exception);
1493 } while (exception.retry);
1497 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1499 struct nfs_open_context *ctx;
1502 ctx = nfs4_state_find_open_context(state);
1504 return PTR_ERR(ctx);
1505 ret = nfs4_do_open_expired(ctx, state);
1506 put_nfs_open_context(ctx);
1511 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1512 * fields corresponding to attributes that were used to store the verifier.
1513 * Make sure we clobber those fields in the later setattr call
1515 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1517 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1518 !(sattr->ia_valid & ATTR_ATIME_SET))
1519 sattr->ia_valid |= ATTR_ATIME;
1521 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1522 !(sattr->ia_valid & ATTR_MTIME_SET))
1523 sattr->ia_valid |= ATTR_MTIME;
1527 * Returns a referenced nfs4_state
1529 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)
1531 struct nfs4_state_owner *sp;
1532 struct nfs4_state *state = NULL;
1533 struct nfs_server *server = NFS_SERVER(dir);
1534 struct nfs4_opendata *opendata;
1537 /* Protect against reboot recovery conflicts */
1539 if (!(sp = nfs4_get_state_owner(server, cred))) {
1540 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1543 status = nfs4_recover_expired_lease(server);
1545 goto err_put_state_owner;
1546 if (path->dentry->d_inode != NULL)
1547 nfs4_return_incompatible_delegation(path->dentry->d_inode, fmode);
1549 opendata = nfs4_opendata_alloc(path, sp, fmode, flags, sattr);
1550 if (opendata == NULL)
1551 goto err_put_state_owner;
1553 if (path->dentry->d_inode != NULL)
1554 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1556 status = _nfs4_proc_open(opendata);
1558 goto err_opendata_put;
1560 if (opendata->o_arg.open_flags & O_EXCL)
1561 nfs4_exclusive_attrset(opendata, sattr);
1563 state = nfs4_opendata_to_nfs4_state(opendata);
1564 status = PTR_ERR(state);
1566 goto err_opendata_put;
1567 nfs4_opendata_put(opendata);
1568 nfs4_put_state_owner(sp);
1572 nfs4_opendata_put(opendata);
1573 err_put_state_owner:
1574 nfs4_put_state_owner(sp);
1581 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)
1583 struct nfs4_exception exception = { };
1584 struct nfs4_state *res;
1588 status = _nfs4_do_open(dir, path, fmode, flags, sattr, cred, &res);
1591 /* NOTE: BAD_SEQID means the server and client disagree about the
1592 * book-keeping w.r.t. state-changing operations
1593 * (OPEN/CLOSE/LOCK/LOCKU...)
1594 * It is actually a sign of a bug on the client or on the server.
1596 * If we receive a BAD_SEQID error in the particular case of
1597 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1598 * have unhashed the old state_owner for us, and that we can
1599 * therefore safely retry using a new one. We should still warn
1600 * the user though...
1602 if (status == -NFS4ERR_BAD_SEQID) {
1603 printk(KERN_WARNING "NFS: v4 server %s "
1604 " returned a bad sequence-id error!\n",
1605 NFS_SERVER(dir)->nfs_client->cl_hostname);
1606 exception.retry = 1;
1610 * BAD_STATEID on OPEN means that the server cancelled our
1611 * state before it received the OPEN_CONFIRM.
1612 * Recover by retrying the request as per the discussion
1613 * on Page 181 of RFC3530.
1615 if (status == -NFS4ERR_BAD_STATEID) {
1616 exception.retry = 1;
1619 if (status == -EAGAIN) {
1620 /* We must have found a delegation */
1621 exception.retry = 1;
1624 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1625 status, &exception));
1626 } while (exception.retry);
1630 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1631 struct nfs_fattr *fattr, struct iattr *sattr,
1632 struct nfs4_state *state)
1634 struct nfs_server *server = NFS_SERVER(inode);
1635 struct nfs_setattrargs arg = {
1636 .fh = NFS_FH(inode),
1639 .bitmask = server->attr_bitmask,
1641 struct nfs_setattrres res = {
1645 struct rpc_message msg = {
1646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1651 unsigned long timestamp = jiffies;
1654 nfs_fattr_init(fattr);
1656 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1657 /* Use that stateid */
1658 } else if (state != NULL) {
1659 nfs4_copy_stateid(&arg.stateid, state, current->files);
1661 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1663 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
1664 if (status == 0 && state != NULL)
1665 renew_lease(server, timestamp);
1669 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1670 struct nfs_fattr *fattr, struct iattr *sattr,
1671 struct nfs4_state *state)
1673 struct nfs_server *server = NFS_SERVER(inode);
1674 struct nfs4_exception exception = { };
1677 err = nfs4_handle_exception(server,
1678 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1680 } while (exception.retry);
1684 struct nfs4_closedata {
1686 struct inode *inode;
1687 struct nfs4_state *state;
1688 struct nfs_closeargs arg;
1689 struct nfs_closeres res;
1690 struct nfs_fattr fattr;
1691 unsigned long timestamp;
1694 static void nfs4_free_closedata(void *data)
1696 struct nfs4_closedata *calldata = data;
1697 struct nfs4_state_owner *sp = calldata->state->owner;
1699 nfs4_put_open_state(calldata->state);
1700 nfs_free_seqid(calldata->arg.seqid);
1701 nfs4_put_state_owner(sp);
1702 path_put(&calldata->path);
1706 static void nfs4_close_done(struct rpc_task *task, void *data)
1708 struct nfs4_closedata *calldata = data;
1709 struct nfs4_state *state = calldata->state;
1710 struct nfs_server *server = NFS_SERVER(calldata->inode);
1712 nfs4_sequence_done(server, &calldata->res.seq_res, task->tk_status);
1713 if (RPC_ASSASSINATED(task))
1715 /* hmm. we are done with the inode, and in the process of freeing
1716 * the state_owner. we keep this around to process errors
1718 switch (task->tk_status) {
1720 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1721 renew_lease(server, calldata->timestamp);
1723 case -NFS4ERR_STALE_STATEID:
1724 case -NFS4ERR_OLD_STATEID:
1725 case -NFS4ERR_BAD_STATEID:
1726 case -NFS4ERR_EXPIRED:
1727 if (calldata->arg.fmode == 0)
1730 if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
1731 nfs4_restart_rpc(task, server->nfs_client);
1735 nfs4_sequence_free_slot(server->nfs_client, &calldata->res.seq_res);
1736 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1739 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1741 struct nfs4_closedata *calldata = data;
1742 struct nfs4_state *state = calldata->state;
1743 int clear_rd, clear_wr, clear_rdwr;
1745 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1748 clear_rd = clear_wr = clear_rdwr = 0;
1749 spin_lock(&state->owner->so_lock);
1750 /* Calculate the change in open mode */
1751 if (state->n_rdwr == 0) {
1752 if (state->n_rdonly == 0) {
1753 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1754 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1756 if (state->n_wronly == 0) {
1757 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1758 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1761 spin_unlock(&state->owner->so_lock);
1762 if (!clear_rd && !clear_wr && !clear_rdwr) {
1763 /* Note: exit _without_ calling nfs4_close_done */
1764 task->tk_action = NULL;
1767 nfs_fattr_init(calldata->res.fattr);
1768 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1769 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1770 calldata->arg.fmode = FMODE_READ;
1771 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1772 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1773 calldata->arg.fmode = FMODE_WRITE;
1775 calldata->timestamp = jiffies;
1776 if (nfs4_setup_sequence((NFS_SERVER(calldata->inode))->nfs_client,
1777 &calldata->arg.seq_args, &calldata->res.seq_res,
1780 rpc_call_start(task);
1783 static const struct rpc_call_ops nfs4_close_ops = {
1784 .rpc_call_prepare = nfs4_close_prepare,
1785 .rpc_call_done = nfs4_close_done,
1786 .rpc_release = nfs4_free_closedata,
1790 * It is possible for data to be read/written from a mem-mapped file
1791 * after the sys_close call (which hits the vfs layer as a flush).
1792 * This means that we can't safely call nfsv4 close on a file until
1793 * the inode is cleared. This in turn means that we are not good
1794 * NFSv4 citizens - we do not indicate to the server to update the file's
1795 * share state even when we are done with one of the three share
1796 * stateid's in the inode.
1798 * NOTE: Caller must be holding the sp->so_owner semaphore!
1800 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1802 struct nfs_server *server = NFS_SERVER(state->inode);
1803 struct nfs4_closedata *calldata;
1804 struct nfs4_state_owner *sp = state->owner;
1805 struct rpc_task *task;
1806 struct rpc_message msg = {
1807 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1808 .rpc_cred = state->owner->so_cred,
1810 struct rpc_task_setup task_setup_data = {
1811 .rpc_client = server->client,
1812 .rpc_message = &msg,
1813 .callback_ops = &nfs4_close_ops,
1814 .workqueue = nfsiod_workqueue,
1815 .flags = RPC_TASK_ASYNC,
1817 int status = -ENOMEM;
1819 calldata = kzalloc(sizeof(*calldata), GFP_KERNEL);
1820 if (calldata == NULL)
1822 calldata->inode = state->inode;
1823 calldata->state = state;
1824 calldata->arg.fh = NFS_FH(state->inode);
1825 calldata->arg.stateid = &state->open_stateid;
1826 if (nfs4_has_session(server->nfs_client))
1827 memset(calldata->arg.stateid->data, 0, 4); /* clear seqid */
1828 /* Serialization for the sequence id */
1829 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1830 if (calldata->arg.seqid == NULL)
1831 goto out_free_calldata;
1832 calldata->arg.fmode = 0;
1833 calldata->arg.bitmask = server->cache_consistency_bitmask;
1834 calldata->res.fattr = &calldata->fattr;
1835 calldata->res.seqid = calldata->arg.seqid;
1836 calldata->res.server = server;
1837 calldata->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
1838 calldata->path.mnt = mntget(path->mnt);
1839 calldata->path.dentry = dget(path->dentry);
1841 msg.rpc_argp = &calldata->arg,
1842 msg.rpc_resp = &calldata->res,
1843 task_setup_data.callback_data = calldata;
1844 task = rpc_run_task(&task_setup_data);
1846 return PTR_ERR(task);
1849 status = rpc_wait_for_completion_task(task);
1855 nfs4_put_open_state(state);
1856 nfs4_put_state_owner(sp);
1860 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state, fmode_t fmode)
1865 /* If the open_intent is for execute, we have an extra check to make */
1866 if (fmode & FMODE_EXEC) {
1867 ret = nfs_may_open(state->inode,
1868 state->owner->so_cred,
1869 nd->intent.open.flags);
1873 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1874 if (!IS_ERR(filp)) {
1875 struct nfs_open_context *ctx;
1876 ctx = nfs_file_open_context(filp);
1880 ret = PTR_ERR(filp);
1882 nfs4_close_sync(path, state, fmode & (FMODE_READ|FMODE_WRITE));
1887 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1889 struct path path = {
1890 .mnt = nd->path.mnt,
1893 struct dentry *parent;
1895 struct rpc_cred *cred;
1896 struct nfs4_state *state;
1898 fmode_t fmode = nd->intent.open.flags & (FMODE_READ | FMODE_WRITE | FMODE_EXEC);
1900 if (nd->flags & LOOKUP_CREATE) {
1901 attr.ia_mode = nd->intent.open.create_mode;
1902 attr.ia_valid = ATTR_MODE;
1903 if (!IS_POSIXACL(dir))
1904 attr.ia_mode &= ~current_umask();
1907 BUG_ON(nd->intent.open.flags & O_CREAT);
1910 cred = rpc_lookup_cred();
1912 return (struct dentry *)cred;
1913 parent = dentry->d_parent;
1914 /* Protect against concurrent sillydeletes */
1915 nfs_block_sillyrename(parent);
1916 state = nfs4_do_open(dir, &path, fmode, nd->intent.open.flags, &attr, cred);
1918 if (IS_ERR(state)) {
1919 if (PTR_ERR(state) == -ENOENT) {
1920 d_add(dentry, NULL);
1921 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1923 nfs_unblock_sillyrename(parent);
1924 return (struct dentry *)state;
1926 res = d_add_unique(dentry, igrab(state->inode));
1929 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1930 nfs_unblock_sillyrename(parent);
1931 nfs4_intent_set_file(nd, &path, state, fmode);
1936 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1938 struct path path = {
1939 .mnt = nd->path.mnt,
1942 struct rpc_cred *cred;
1943 struct nfs4_state *state;
1944 fmode_t fmode = openflags & (FMODE_READ | FMODE_WRITE);
1946 cred = rpc_lookup_cred();
1948 return PTR_ERR(cred);
1949 state = nfs4_do_open(dir, &path, fmode, openflags, NULL, cred);
1951 if (IS_ERR(state)) {
1952 switch (PTR_ERR(state)) {
1958 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1964 if (state->inode == dentry->d_inode) {
1965 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1966 nfs4_intent_set_file(nd, &path, state, fmode);
1969 nfs4_close_sync(&path, state, fmode);
1975 void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
1977 if (ctx->state == NULL)
1980 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
1982 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
1985 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1987 struct nfs4_server_caps_arg args = {
1990 struct nfs4_server_caps_res res = {};
1991 struct rpc_message msg = {
1992 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1998 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2000 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2001 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2002 server->caps |= NFS_CAP_ACLS;
2003 if (res.has_links != 0)
2004 server->caps |= NFS_CAP_HARDLINKS;
2005 if (res.has_symlinks != 0)
2006 server->caps |= NFS_CAP_SYMLINKS;
2007 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2008 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2009 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2010 server->acl_bitmask = res.acl_bitmask;
2016 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2018 struct nfs4_exception exception = { };
2021 err = nfs4_handle_exception(server,
2022 _nfs4_server_capabilities(server, fhandle),
2024 } while (exception.retry);
2028 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2029 struct nfs_fsinfo *info)
2031 struct nfs4_lookup_root_arg args = {
2032 .bitmask = nfs4_fattr_bitmap,
2034 struct nfs4_lookup_res res = {
2036 .fattr = info->fattr,
2039 struct rpc_message msg = {
2040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2046 nfs_fattr_init(info->fattr);
2047 status = nfs4_recover_expired_lease(server);
2049 status = nfs4_check_client_ready(server->nfs_client);
2051 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2055 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2056 struct nfs_fsinfo *info)
2058 struct nfs4_exception exception = { };
2061 err = nfs4_handle_exception(server,
2062 _nfs4_lookup_root(server, fhandle, info),
2064 } while (exception.retry);
2069 * get the file handle for the "/" directory on the server
2071 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
2072 struct nfs_fsinfo *info)
2076 status = nfs4_lookup_root(server, fhandle, info);
2078 status = nfs4_server_capabilities(server, fhandle);
2080 status = nfs4_do_fsinfo(server, fhandle, info);
2081 return nfs4_map_errors(status);
2085 * Get locations and (maybe) other attributes of a referral.
2086 * Note that we'll actually follow the referral later when
2087 * we detect fsid mismatch in inode revalidation
2089 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
2091 int status = -ENOMEM;
2092 struct page *page = NULL;
2093 struct nfs4_fs_locations *locations = NULL;
2095 page = alloc_page(GFP_KERNEL);
2098 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2099 if (locations == NULL)
2102 status = nfs4_proc_fs_locations(dir, name, locations, page);
2105 /* Make sure server returned a different fsid for the referral */
2106 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2107 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
2112 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2113 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
2115 fattr->mode = S_IFDIR;
2116 memset(fhandle, 0, sizeof(struct nfs_fh));
2125 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2127 struct nfs4_getattr_arg args = {
2129 .bitmask = server->attr_bitmask,
2131 struct nfs4_getattr_res res = {
2135 struct rpc_message msg = {
2136 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2141 nfs_fattr_init(fattr);
2142 return nfs4_call_sync(server, &msg, &args, &res, 0);
2145 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2147 struct nfs4_exception exception = { };
2150 err = nfs4_handle_exception(server,
2151 _nfs4_proc_getattr(server, fhandle, fattr),
2153 } while (exception.retry);
2158 * The file is not closed if it is opened due to the a request to change
2159 * the size of the file. The open call will not be needed once the
2160 * VFS layer lookup-intents are implemented.
2162 * Close is called when the inode is destroyed.
2163 * If we haven't opened the file for O_WRONLY, we
2164 * need to in the size_change case to obtain a stateid.
2167 * Because OPEN is always done by name in nfsv4, it is
2168 * possible that we opened a different file by the same
2169 * name. We can recognize this race condition, but we
2170 * can't do anything about it besides returning an error.
2172 * This will be fixed with VFS changes (lookup-intent).
2175 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2176 struct iattr *sattr)
2178 struct inode *inode = dentry->d_inode;
2179 struct rpc_cred *cred = NULL;
2180 struct nfs4_state *state = NULL;
2183 nfs_fattr_init(fattr);
2185 /* Search for an existing open(O_WRITE) file */
2186 if (sattr->ia_valid & ATTR_FILE) {
2187 struct nfs_open_context *ctx;
2189 ctx = nfs_file_open_context(sattr->ia_file);
2196 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2198 nfs_setattr_update_inode(inode, sattr);
2202 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
2203 const struct qstr *name, struct nfs_fh *fhandle,
2204 struct nfs_fattr *fattr)
2207 struct nfs4_lookup_arg args = {
2208 .bitmask = server->attr_bitmask,
2212 struct nfs4_lookup_res res = {
2217 struct rpc_message msg = {
2218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2223 nfs_fattr_init(fattr);
2225 dprintk("NFS call lookupfh %s\n", name->name);
2226 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2227 dprintk("NFS reply lookupfh: %d\n", status);
2231 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
2232 struct qstr *name, struct nfs_fh *fhandle,
2233 struct nfs_fattr *fattr)
2235 struct nfs4_exception exception = { };
2238 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
2240 if (err == -NFS4ERR_MOVED) {
2244 err = nfs4_handle_exception(server, err, &exception);
2245 } while (exception.retry);
2249 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
2250 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2254 dprintk("NFS call lookup %s\n", name->name);
2255 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
2256 if (status == -NFS4ERR_MOVED)
2257 status = nfs4_get_referral(dir, name, fattr, fhandle);
2258 dprintk("NFS reply lookup: %d\n", status);
2262 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2264 struct nfs4_exception exception = { };
2267 err = nfs4_handle_exception(NFS_SERVER(dir),
2268 _nfs4_proc_lookup(dir, name, fhandle, fattr),
2270 } while (exception.retry);
2274 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2276 struct nfs_server *server = NFS_SERVER(inode);
2277 struct nfs_fattr fattr;
2278 struct nfs4_accessargs args = {
2279 .fh = NFS_FH(inode),
2280 .bitmask = server->attr_bitmask,
2282 struct nfs4_accessres res = {
2286 struct rpc_message msg = {
2287 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2290 .rpc_cred = entry->cred,
2292 int mode = entry->mask;
2296 * Determine which access bits we want to ask for...
2298 if (mode & MAY_READ)
2299 args.access |= NFS4_ACCESS_READ;
2300 if (S_ISDIR(inode->i_mode)) {
2301 if (mode & MAY_WRITE)
2302 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2303 if (mode & MAY_EXEC)
2304 args.access |= NFS4_ACCESS_LOOKUP;
2306 if (mode & MAY_WRITE)
2307 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2308 if (mode & MAY_EXEC)
2309 args.access |= NFS4_ACCESS_EXECUTE;
2311 nfs_fattr_init(&fattr);
2312 status = nfs4_call_sync(server, &msg, &args, &res, 0);
2315 if (res.access & NFS4_ACCESS_READ)
2316 entry->mask |= MAY_READ;
2317 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2318 entry->mask |= MAY_WRITE;
2319 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2320 entry->mask |= MAY_EXEC;
2321 nfs_refresh_inode(inode, &fattr);
2326 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2328 struct nfs4_exception exception = { };
2331 err = nfs4_handle_exception(NFS_SERVER(inode),
2332 _nfs4_proc_access(inode, entry),
2334 } while (exception.retry);
2339 * TODO: For the time being, we don't try to get any attributes
2340 * along with any of the zero-copy operations READ, READDIR,
2343 * In the case of the first three, we want to put the GETATTR
2344 * after the read-type operation -- this is because it is hard
2345 * to predict the length of a GETATTR response in v4, and thus
2346 * align the READ data correctly. This means that the GETATTR
2347 * may end up partially falling into the page cache, and we should
2348 * shift it into the 'tail' of the xdr_buf before processing.
2349 * To do this efficiently, we need to know the total length
2350 * of data received, which doesn't seem to be available outside
2353 * In the case of WRITE, we also want to put the GETATTR after
2354 * the operation -- in this case because we want to make sure
2355 * we get the post-operation mtime and size. This means that
2356 * we can't use xdr_encode_pages() as written: we need a variant
2357 * of it which would leave room in the 'tail' iovec.
2359 * Both of these changes to the XDR layer would in fact be quite
2360 * minor, but I decided to leave them for a subsequent patch.
2362 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2363 unsigned int pgbase, unsigned int pglen)
2365 struct nfs4_readlink args = {
2366 .fh = NFS_FH(inode),
2371 struct nfs4_readlink_res res;
2372 struct rpc_message msg = {
2373 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2378 return nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
2381 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2382 unsigned int pgbase, unsigned int pglen)
2384 struct nfs4_exception exception = { };
2387 err = nfs4_handle_exception(NFS_SERVER(inode),
2388 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2390 } while (exception.retry);
2396 * We will need to arrange for the VFS layer to provide an atomic open.
2397 * Until then, this create/open method is prone to inefficiency and race
2398 * conditions due to the lookup, create, and open VFS calls from sys_open()
2399 * placed on the wire.
2401 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2402 * The file will be opened again in the subsequent VFS open call
2403 * (nfs4_proc_file_open).
2405 * The open for read will just hang around to be used by any process that
2406 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2410 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2411 int flags, struct nameidata *nd)
2413 struct path path = {
2414 .mnt = nd->path.mnt,
2417 struct nfs4_state *state;
2418 struct rpc_cred *cred;
2419 fmode_t fmode = flags & (FMODE_READ | FMODE_WRITE);
2422 cred = rpc_lookup_cred();
2424 status = PTR_ERR(cred);
2427 state = nfs4_do_open(dir, &path, fmode, flags, sattr, cred);
2429 if (IS_ERR(state)) {
2430 status = PTR_ERR(state);
2433 d_add(dentry, igrab(state->inode));
2434 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2435 if (flags & O_EXCL) {
2436 struct nfs_fattr fattr;
2437 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2439 nfs_setattr_update_inode(state->inode, sattr);
2440 nfs_post_op_update_inode(state->inode, &fattr);
2442 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2443 status = nfs4_intent_set_file(nd, &path, state, fmode);
2445 nfs4_close_sync(&path, state, fmode);
2452 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2454 struct nfs_server *server = NFS_SERVER(dir);
2455 struct nfs_removeargs args = {
2457 .name.len = name->len,
2458 .name.name = name->name,
2459 .bitmask = server->attr_bitmask,
2461 struct nfs_removeres res = {
2464 struct rpc_message msg = {
2465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2471 nfs_fattr_init(&res.dir_attr);
2472 status = nfs4_call_sync(server, &msg, &args, &res, 1);
2474 update_changeattr(dir, &res.cinfo);
2475 nfs_post_op_update_inode(dir, &res.dir_attr);
2480 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2482 struct nfs4_exception exception = { };
2485 err = nfs4_handle_exception(NFS_SERVER(dir),
2486 _nfs4_proc_remove(dir, name),
2488 } while (exception.retry);
2492 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2494 struct nfs_server *server = NFS_SERVER(dir);
2495 struct nfs_removeargs *args = msg->rpc_argp;
2496 struct nfs_removeres *res = msg->rpc_resp;
2498 args->bitmask = server->cache_consistency_bitmask;
2499 res->server = server;
2500 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2503 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2505 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2507 nfs4_sequence_done(res->server, &res->seq_res, task->tk_status);
2508 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2510 nfs4_sequence_free_slot(res->server->nfs_client, &res->seq_res);
2511 update_changeattr(dir, &res->cinfo);
2512 nfs_post_op_update_inode(dir, &res->dir_attr);
2516 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2517 struct inode *new_dir, struct qstr *new_name)
2519 struct nfs_server *server = NFS_SERVER(old_dir);
2520 struct nfs4_rename_arg arg = {
2521 .old_dir = NFS_FH(old_dir),
2522 .new_dir = NFS_FH(new_dir),
2523 .old_name = old_name,
2524 .new_name = new_name,
2525 .bitmask = server->attr_bitmask,
2527 struct nfs_fattr old_fattr, new_fattr;
2528 struct nfs4_rename_res res = {
2530 .old_fattr = &old_fattr,
2531 .new_fattr = &new_fattr,
2533 struct rpc_message msg = {
2534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2540 nfs_fattr_init(res.old_fattr);
2541 nfs_fattr_init(res.new_fattr);
2542 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2545 update_changeattr(old_dir, &res.old_cinfo);
2546 nfs_post_op_update_inode(old_dir, res.old_fattr);
2547 update_changeattr(new_dir, &res.new_cinfo);
2548 nfs_post_op_update_inode(new_dir, res.new_fattr);
2553 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2554 struct inode *new_dir, struct qstr *new_name)
2556 struct nfs4_exception exception = { };
2559 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2560 _nfs4_proc_rename(old_dir, old_name,
2563 } while (exception.retry);
2567 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2569 struct nfs_server *server = NFS_SERVER(inode);
2570 struct nfs4_link_arg arg = {
2571 .fh = NFS_FH(inode),
2572 .dir_fh = NFS_FH(dir),
2574 .bitmask = server->attr_bitmask,
2576 struct nfs_fattr fattr, dir_attr;
2577 struct nfs4_link_res res = {
2580 .dir_attr = &dir_attr,
2582 struct rpc_message msg = {
2583 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2589 nfs_fattr_init(res.fattr);
2590 nfs_fattr_init(res.dir_attr);
2591 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
2593 update_changeattr(dir, &res.cinfo);
2594 nfs_post_op_update_inode(dir, res.dir_attr);
2595 nfs_post_op_update_inode(inode, res.fattr);
2601 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2603 struct nfs4_exception exception = { };
2606 err = nfs4_handle_exception(NFS_SERVER(inode),
2607 _nfs4_proc_link(inode, dir, name),
2609 } while (exception.retry);
2613 struct nfs4_createdata {
2614 struct rpc_message msg;
2615 struct nfs4_create_arg arg;
2616 struct nfs4_create_res res;
2618 struct nfs_fattr fattr;
2619 struct nfs_fattr dir_fattr;
2622 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2623 struct qstr *name, struct iattr *sattr, u32 ftype)
2625 struct nfs4_createdata *data;
2627 data = kzalloc(sizeof(*data), GFP_KERNEL);
2629 struct nfs_server *server = NFS_SERVER(dir);
2631 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2632 data->msg.rpc_argp = &data->arg;
2633 data->msg.rpc_resp = &data->res;
2634 data->arg.dir_fh = NFS_FH(dir);
2635 data->arg.server = server;
2636 data->arg.name = name;
2637 data->arg.attrs = sattr;
2638 data->arg.ftype = ftype;
2639 data->arg.bitmask = server->attr_bitmask;
2640 data->res.server = server;
2641 data->res.fh = &data->fh;
2642 data->res.fattr = &data->fattr;
2643 data->res.dir_fattr = &data->dir_fattr;
2644 nfs_fattr_init(data->res.fattr);
2645 nfs_fattr_init(data->res.dir_fattr);
2650 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2652 int status = nfs4_call_sync(NFS_SERVER(dir), &data->msg,
2653 &data->arg, &data->res, 1);
2655 update_changeattr(dir, &data->res.dir_cinfo);
2656 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2657 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2662 static void nfs4_free_createdata(struct nfs4_createdata *data)
2667 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2668 struct page *page, unsigned int len, struct iattr *sattr)
2670 struct nfs4_createdata *data;
2671 int status = -ENAMETOOLONG;
2673 if (len > NFS4_MAXPATHLEN)
2677 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2681 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2682 data->arg.u.symlink.pages = &page;
2683 data->arg.u.symlink.len = len;
2685 status = nfs4_do_create(dir, dentry, data);
2687 nfs4_free_createdata(data);
2692 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2693 struct page *page, unsigned int len, struct iattr *sattr)
2695 struct nfs4_exception exception = { };
2698 err = nfs4_handle_exception(NFS_SERVER(dir),
2699 _nfs4_proc_symlink(dir, dentry, page,
2702 } while (exception.retry);
2706 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2707 struct iattr *sattr)
2709 struct nfs4_createdata *data;
2710 int status = -ENOMEM;
2712 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2716 status = nfs4_do_create(dir, dentry, data);
2718 nfs4_free_createdata(data);
2723 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2724 struct iattr *sattr)
2726 struct nfs4_exception exception = { };
2729 err = nfs4_handle_exception(NFS_SERVER(dir),
2730 _nfs4_proc_mkdir(dir, dentry, sattr),
2732 } while (exception.retry);
2736 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2737 u64 cookie, struct page *page, unsigned int count, int plus)
2739 struct inode *dir = dentry->d_inode;
2740 struct nfs4_readdir_arg args = {
2745 .bitmask = NFS_SERVER(dentry->d_inode)->cache_consistency_bitmask,
2747 struct nfs4_readdir_res res;
2748 struct rpc_message msg = {
2749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2756 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2757 dentry->d_parent->d_name.name,
2758 dentry->d_name.name,
2759 (unsigned long long)cookie);
2760 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2761 res.pgbase = args.pgbase;
2762 status = nfs4_call_sync(NFS_SERVER(dir), &msg, &args, &res, 0);
2764 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2766 nfs_invalidate_atime(dir);
2768 dprintk("%s: returns %d\n", __func__, status);
2772 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2773 u64 cookie, struct page *page, unsigned int count, int plus)
2775 struct nfs4_exception exception = { };
2778 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2779 _nfs4_proc_readdir(dentry, cred, cookie,
2782 } while (exception.retry);
2786 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2787 struct iattr *sattr, dev_t rdev)
2789 struct nfs4_createdata *data;
2790 int mode = sattr->ia_mode;
2791 int status = -ENOMEM;
2793 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2794 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2796 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2801 data->arg.ftype = NF4FIFO;
2802 else if (S_ISBLK(mode)) {
2803 data->arg.ftype = NF4BLK;
2804 data->arg.u.device.specdata1 = MAJOR(rdev);
2805 data->arg.u.device.specdata2 = MINOR(rdev);
2807 else if (S_ISCHR(mode)) {
2808 data->arg.ftype = NF4CHR;
2809 data->arg.u.device.specdata1 = MAJOR(rdev);
2810 data->arg.u.device.specdata2 = MINOR(rdev);
2813 status = nfs4_do_create(dir, dentry, data);
2815 nfs4_free_createdata(data);
2820 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2821 struct iattr *sattr, dev_t rdev)
2823 struct nfs4_exception exception = { };
2826 err = nfs4_handle_exception(NFS_SERVER(dir),
2827 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2829 } while (exception.retry);
2833 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2834 struct nfs_fsstat *fsstat)
2836 struct nfs4_statfs_arg args = {
2838 .bitmask = server->attr_bitmask,
2840 struct nfs4_statfs_res res = {
2843 struct rpc_message msg = {
2844 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2849 nfs_fattr_init(fsstat->fattr);
2850 return nfs4_call_sync(server, &msg, &args, &res, 0);
2853 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2855 struct nfs4_exception exception = { };
2858 err = nfs4_handle_exception(server,
2859 _nfs4_proc_statfs(server, fhandle, fsstat),
2861 } while (exception.retry);
2865 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2866 struct nfs_fsinfo *fsinfo)
2868 struct nfs4_fsinfo_arg args = {
2870 .bitmask = server->attr_bitmask,
2872 struct nfs4_fsinfo_res res = {
2875 struct rpc_message msg = {
2876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2881 return nfs4_call_sync(server, &msg, &args, &res, 0);
2884 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2886 struct nfs4_exception exception = { };
2890 err = nfs4_handle_exception(server,
2891 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2893 } while (exception.retry);
2897 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2899 nfs_fattr_init(fsinfo->fattr);
2900 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2903 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2904 struct nfs_pathconf *pathconf)
2906 struct nfs4_pathconf_arg args = {
2908 .bitmask = server->attr_bitmask,
2910 struct nfs4_pathconf_res res = {
2911 .pathconf = pathconf,
2913 struct rpc_message msg = {
2914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2919 /* None of the pathconf attributes are mandatory to implement */
2920 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2921 memset(pathconf, 0, sizeof(*pathconf));
2925 nfs_fattr_init(pathconf->fattr);
2926 return nfs4_call_sync(server, &msg, &args, &res, 0);
2929 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2930 struct nfs_pathconf *pathconf)
2932 struct nfs4_exception exception = { };
2936 err = nfs4_handle_exception(server,
2937 _nfs4_proc_pathconf(server, fhandle, pathconf),
2939 } while (exception.retry);
2943 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2945 struct nfs_server *server = NFS_SERVER(data->inode);
2947 dprintk("--> %s\n", __func__);
2949 /* nfs4_sequence_free_slot called in the read rpc_call_done */
2950 nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
2952 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
2953 nfs4_restart_rpc(task, server->nfs_client);
2957 nfs_invalidate_atime(data->inode);
2958 if (task->tk_status > 0)
2959 renew_lease(server, data->timestamp);
2963 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2965 data->timestamp = jiffies;
2966 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2969 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2971 struct inode *inode = data->inode;
2973 /* slot is freed in nfs_writeback_done */
2974 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
2977 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
2978 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
2981 if (task->tk_status >= 0) {
2982 renew_lease(NFS_SERVER(inode), data->timestamp);
2983 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2988 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
2990 struct nfs_server *server = NFS_SERVER(data->inode);
2992 data->args.bitmask = server->cache_consistency_bitmask;
2993 data->res.server = server;
2994 data->timestamp = jiffies;
2996 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
2999 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
3001 struct inode *inode = data->inode;
3003 nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
3005 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3006 nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
3009 nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
3010 &data->res.seq_res);
3011 nfs_refresh_inode(inode, data->res.fattr);
3015 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
3017 struct nfs_server *server = NFS_SERVER(data->inode);
3019 data->args.bitmask = server->cache_consistency_bitmask;
3020 data->res.server = server;
3021 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3025 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3026 * standalone procedure for queueing an asynchronous RENEW.
3028 static void nfs4_renew_done(struct rpc_task *task, void *data)
3030 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
3031 unsigned long timestamp = (unsigned long)data;
3033 if (task->tk_status < 0) {
3034 /* Unless we're shutting down, schedule state recovery! */
3035 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) != 0)
3036 nfs4_schedule_state_recovery(clp);
3039 spin_lock(&clp->cl_lock);
3040 if (time_before(clp->cl_last_renewal,timestamp))
3041 clp->cl_last_renewal = timestamp;
3042 spin_unlock(&clp->cl_lock);
3043 dprintk("%s calling put_rpccred on rpc_cred %p\n", __func__,
3044 task->tk_msg.rpc_cred);
3045 put_rpccred(task->tk_msg.rpc_cred);
3048 static const struct rpc_call_ops nfs4_renew_ops = {
3049 .rpc_call_done = nfs4_renew_done,
3052 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
3054 struct rpc_message msg = {
3055 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3060 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3061 &nfs4_renew_ops, (void *)jiffies);
3064 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3066 struct rpc_message msg = {
3067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3071 unsigned long now = jiffies;
3074 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3077 spin_lock(&clp->cl_lock);
3078 if (time_before(clp->cl_last_renewal,now))
3079 clp->cl_last_renewal = now;
3080 spin_unlock(&clp->cl_lock);
3084 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3086 return (server->caps & NFS_CAP_ACLS)
3087 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3088 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3091 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3092 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3095 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3097 static void buf_to_pages(const void *buf, size_t buflen,
3098 struct page **pages, unsigned int *pgbase)
3100 const void *p = buf;
3102 *pgbase = offset_in_page(buf);
3104 while (p < buf + buflen) {
3105 *(pages++) = virt_to_page(p);
3106 p += PAGE_CACHE_SIZE;
3110 struct nfs4_cached_acl {
3116 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3118 struct nfs_inode *nfsi = NFS_I(inode);
3120 spin_lock(&inode->i_lock);
3121 kfree(nfsi->nfs4_acl);
3122 nfsi->nfs4_acl = acl;
3123 spin_unlock(&inode->i_lock);
3126 static void nfs4_zap_acl_attr(struct inode *inode)
3128 nfs4_set_cached_acl(inode, NULL);
3131 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3133 struct nfs_inode *nfsi = NFS_I(inode);
3134 struct nfs4_cached_acl *acl;
3137 spin_lock(&inode->i_lock);
3138 acl = nfsi->nfs4_acl;
3141 if (buf == NULL) /* user is just asking for length */
3143 if (acl->cached == 0)
3145 ret = -ERANGE; /* see getxattr(2) man page */
3146 if (acl->len > buflen)
3148 memcpy(buf, acl->data, acl->len);
3152 spin_unlock(&inode->i_lock);
3156 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
3158 struct nfs4_cached_acl *acl;
3160 if (buf && acl_len <= PAGE_SIZE) {
3161 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3165 memcpy(acl->data, buf, acl_len);
3167 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3174 nfs4_set_cached_acl(inode, acl);
3177 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3179 struct page *pages[NFS4ACL_MAXPAGES];
3180 struct nfs_getaclargs args = {
3181 .fh = NFS_FH(inode),
3185 struct nfs_getaclres res = {
3189 struct rpc_message msg = {
3190 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3194 struct page *localpage = NULL;
3197 if (buflen < PAGE_SIZE) {
3198 /* As long as we're doing a round trip to the server anyway,
3199 * let's be prepared for a page of acl data. */
3200 localpage = alloc_page(GFP_KERNEL);
3201 resp_buf = page_address(localpage);
3202 if (localpage == NULL)
3204 args.acl_pages[0] = localpage;
3205 args.acl_pgbase = 0;
3206 args.acl_len = PAGE_SIZE;
3209 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
3211 ret = nfs4_call_sync(NFS_SERVER(inode), &msg, &args, &res, 0);
3214 if (res.acl_len > args.acl_len)
3215 nfs4_write_cached_acl(inode, NULL, res.acl_len);
3217 nfs4_write_cached_acl(inode, resp_buf, res.acl_len);
3220 if (res.acl_len > buflen)
3223 memcpy(buf, resp_buf, res.acl_len);
3228 __free_page(localpage);
3232 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3234 struct nfs4_exception exception = { };
3237 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3240 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3241 } while (exception.retry);
3245 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3247 struct nfs_server *server = NFS_SERVER(inode);
3250 if (!nfs4_server_supports_acls(server))
3252 ret = nfs_revalidate_inode(server, inode);
3255 ret = nfs4_read_cached_acl(inode, buf, buflen);
3258 return nfs4_get_acl_uncached(inode, buf, buflen);
3261 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3263 struct nfs_server *server = NFS_SERVER(inode);
3264 struct page *pages[NFS4ACL_MAXPAGES];
3265 struct nfs_setaclargs arg = {
3266 .fh = NFS_FH(inode),
3270 struct nfs_setaclres res;
3271 struct rpc_message msg = {
3272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3278 if (!nfs4_server_supports_acls(server))
3280 nfs_inode_return_delegation(inode);
3281 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3282 ret = nfs4_call_sync(server, &msg, &arg, &res, 1);
3283 nfs_access_zap_cache(inode);
3284 nfs_zap_acl_cache(inode);
3288 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3290 struct nfs4_exception exception = { };
3293 err = nfs4_handle_exception(NFS_SERVER(inode),
3294 __nfs4_proc_set_acl(inode, buf, buflen),
3296 } while (exception.retry);
3301 _nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs_client *clp, struct nfs4_state *state)
3303 if (!clp || task->tk_status >= 0)
3305 switch(task->tk_status) {
3306 case -NFS4ERR_ADMIN_REVOKED:
3307 case -NFS4ERR_BAD_STATEID:
3308 case -NFS4ERR_OPENMODE:
3311 nfs4_state_mark_reclaim_nograce(clp, state);
3312 case -NFS4ERR_STALE_CLIENTID:
3313 case -NFS4ERR_STALE_STATEID:
3314 case -NFS4ERR_EXPIRED:
3315 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3316 nfs4_schedule_state_recovery(clp);
3317 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3318 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3319 task->tk_status = 0;
3321 #if defined(CONFIG_NFS_V4_1)
3322 case -NFS4ERR_BADSESSION:
3323 case -NFS4ERR_BADSLOT:
3324 case -NFS4ERR_BAD_HIGH_SLOT:
3325 case -NFS4ERR_DEADSESSION:
3326 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3327 case -NFS4ERR_SEQ_FALSE_RETRY:
3328 case -NFS4ERR_SEQ_MISORDERED:
3329 dprintk("%s ERROR %d, Reset session\n", __func__,
3331 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
3332 task->tk_status = 0;
3334 #endif /* CONFIG_NFS_V4_1 */
3335 case -NFS4ERR_DELAY:
3337 nfs_inc_server_stats(server, NFSIOS_DELAY);
3338 case -NFS4ERR_GRACE:
3339 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3340 task->tk_status = 0;
3342 case -NFS4ERR_OLD_STATEID:
3343 task->tk_status = 0;
3346 task->tk_status = nfs4_map_errors(task->tk_status);
3351 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3353 return _nfs4_async_handle_error(task, server, server->nfs_client, state);
3356 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
3358 nfs4_verifier sc_verifier;
3359 struct nfs4_setclientid setclientid = {
3360 .sc_verifier = &sc_verifier,
3363 struct rpc_message msg = {
3364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3365 .rpc_argp = &setclientid,
3373 p = (__be32*)sc_verifier.data;
3374 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
3375 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
3378 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3379 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3381 rpc_peeraddr2str(clp->cl_rpcclient,
3383 rpc_peeraddr2str(clp->cl_rpcclient,
3385 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3386 clp->cl_id_uniquifier);
3387 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3388 sizeof(setclientid.sc_netid),
3389 rpc_peeraddr2str(clp->cl_rpcclient,
3390 RPC_DISPLAY_NETID));
3391 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3392 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3393 clp->cl_ipaddr, port >> 8, port & 255);
3395 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3396 if (status != -NFS4ERR_CLID_INUSE)
3401 ssleep(clp->cl_lease_time + 1);
3403 if (++clp->cl_id_uniquifier == 0)
3409 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3411 struct nfs_fsinfo fsinfo;
3412 struct rpc_message msg = {
3413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
3415 .rpc_resp = &fsinfo,
3422 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3424 spin_lock(&clp->cl_lock);
3425 clp->cl_lease_time = fsinfo.lease_time * HZ;
3426 clp->cl_last_renewal = now;
3427 spin_unlock(&clp->cl_lock);
3432 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
3437 err = _nfs4_proc_setclientid_confirm(clp, cred);
3441 case -NFS4ERR_RESOURCE:
3442 /* The IBM lawyers misread another document! */
3443 case -NFS4ERR_DELAY:
3444 err = nfs4_delay(clp->cl_rpcclient, &timeout);
3450 struct nfs4_delegreturndata {
3451 struct nfs4_delegreturnargs args;
3452 struct nfs4_delegreturnres res;
3454 nfs4_stateid stateid;
3455 unsigned long timestamp;
3456 struct nfs_fattr fattr;
3460 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
3462 struct nfs4_delegreturndata *data = calldata;
3464 nfs4_sequence_done_free_slot(data->res.server, &data->res.seq_res,
3467 data->rpc_status = task->tk_status;
3468 if (data->rpc_status == 0)
3469 renew_lease(data->res.server, data->timestamp);
3472 static void nfs4_delegreturn_release(void *calldata)
3477 #if defined(CONFIG_NFS_V4_1)
3478 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
3480 struct nfs4_delegreturndata *d_data;
3482 d_data = (struct nfs4_delegreturndata *)data;
3484 if (nfs4_setup_sequence(d_data->res.server->nfs_client,
3485 &d_data->args.seq_args,
3486 &d_data->res.seq_res, 1, task))
3488 rpc_call_start(task);
3490 #endif /* CONFIG_NFS_V4_1 */
3492 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3493 #if defined(CONFIG_NFS_V4_1)
3494 .rpc_call_prepare = nfs4_delegreturn_prepare,
3495 #endif /* CONFIG_NFS_V4_1 */
3496 .rpc_call_done = nfs4_delegreturn_done,
3497 .rpc_release = nfs4_delegreturn_release,
3500 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3502 struct nfs4_delegreturndata *data;
3503 struct nfs_server *server = NFS_SERVER(inode);
3504 struct rpc_task *task;
3505 struct rpc_message msg = {
3506 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3509 struct rpc_task_setup task_setup_data = {
3510 .rpc_client = server->client,
3511 .rpc_message = &msg,
3512 .callback_ops = &nfs4_delegreturn_ops,
3513 .flags = RPC_TASK_ASYNC,
3517 data = kzalloc(sizeof(*data), GFP_KERNEL);
3520 data->args.fhandle = &data->fh;
3521 data->args.stateid = &data->stateid;
3522 data->args.bitmask = server->attr_bitmask;
3523 nfs_copy_fh(&data->fh, NFS_FH(inode));
3524 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3525 data->res.fattr = &data->fattr;
3526 data->res.server = server;
3527 data->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3528 nfs_fattr_init(data->res.fattr);
3529 data->timestamp = jiffies;
3530 data->rpc_status = 0;
3532 task_setup_data.callback_data = data;
3533 msg.rpc_argp = &data->args,
3534 msg.rpc_resp = &data->res,
3535 task = rpc_run_task(&task_setup_data);
3537 return PTR_ERR(task);
3540 status = nfs4_wait_for_completion_rpc_task(task);
3543 status = data->rpc_status;
3546 nfs_refresh_inode(inode, &data->fattr);
3552 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3554 struct nfs_server *server = NFS_SERVER(inode);
3555 struct nfs4_exception exception = { };
3558 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3560 case -NFS4ERR_STALE_STATEID:
3561 case -NFS4ERR_EXPIRED:
3565 err = nfs4_handle_exception(server, err, &exception);
3566 } while (exception.retry);
3570 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3571 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3574 * sleep, with exponential backoff, and retry the LOCK operation.
3576 static unsigned long
3577 nfs4_set_lock_task_retry(unsigned long timeout)
3579 schedule_timeout_killable(timeout);
3581 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3582 return NFS4_LOCK_MAXTIMEOUT;
3586 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3588 struct inode *inode = state->inode;
3589 struct nfs_server *server = NFS_SERVER(inode);
3590 struct nfs_client *clp = server->nfs_client;
3591 struct nfs_lockt_args arg = {
3592 .fh = NFS_FH(inode),
3595 struct nfs_lockt_res res = {
3598 struct rpc_message msg = {
3599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3602 .rpc_cred = state->owner->so_cred,
3604 struct nfs4_lock_state *lsp;
3607 arg.lock_owner.clientid = clp->cl_clientid;
3608 status = nfs4_set_lock_state(state, request);
3611 lsp = request->fl_u.nfs4_fl.owner;
3612 arg.lock_owner.id = lsp->ls_id.id;
3613 status = nfs4_call_sync(server, &msg, &arg, &res, 1);
3616 request->fl_type = F_UNLCK;
3618 case -NFS4ERR_DENIED:
3621 request->fl_ops->fl_release_private(request);
3626 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3628 struct nfs4_exception exception = { };
3632 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3633 _nfs4_proc_getlk(state, cmd, request),
3635 } while (exception.retry);
3639 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3642 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3644 res = posix_lock_file_wait(file, fl);
3647 res = flock_lock_file_wait(file, fl);
3655 struct nfs4_unlockdata {
3656 struct nfs_locku_args arg;
3657 struct nfs_locku_res res;
3658 struct nfs4_lock_state *lsp;
3659 struct nfs_open_context *ctx;
3660 struct file_lock fl;
3661 const struct nfs_server *server;
3662 unsigned long timestamp;
3665 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3666 struct nfs_open_context *ctx,
3667 struct nfs4_lock_state *lsp,
3668 struct nfs_seqid *seqid)
3670 struct nfs4_unlockdata *p;
3671 struct inode *inode = lsp->ls_state->inode;
3673 p = kzalloc(sizeof(*p), GFP_KERNEL);
3676 p->arg.fh = NFS_FH(inode);
3678 p->arg.seqid = seqid;
3679 p->res.seqid = seqid;
3680 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3681 p->arg.stateid = &lsp->ls_stateid;
3683 atomic_inc(&lsp->ls_count);
3684 /* Ensure we don't close file until we're done freeing locks! */
3685 p->ctx = get_nfs_open_context(ctx);
3686 memcpy(&p->fl, fl, sizeof(p->fl));
3687 p->server = NFS_SERVER(inode);
3691 static void nfs4_locku_release_calldata(void *data)
3693 struct nfs4_unlockdata *calldata = data;
3694 nfs_free_seqid(calldata->arg.seqid);
3695 nfs4_put_lock_state(calldata->lsp);
3696 put_nfs_open_context(calldata->ctx);
3700 static void nfs4_locku_done(struct rpc_task *task, void *data)
3702 struct nfs4_unlockdata *calldata = data;
3704 nfs4_sequence_done(calldata->server, &calldata->res.seq_res,
3706 if (RPC_ASSASSINATED(task))
3708 switch (task->tk_status) {
3710 memcpy(calldata->lsp->ls_stateid.data,
3711 calldata->res.stateid.data,
3712 sizeof(calldata->lsp->ls_stateid.data));
3713 renew_lease(calldata->server, calldata->timestamp);
3715 case -NFS4ERR_BAD_STATEID:
3716 case -NFS4ERR_OLD_STATEID:
3717 case -NFS4ERR_STALE_STATEID:
3718 case -NFS4ERR_EXPIRED:
3721 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
3722 nfs4_restart_rpc(task,
3723 calldata->server->nfs_client);
3725 nfs4_sequence_free_slot(calldata->server->nfs_client,
3726 &calldata->res.seq_res);
3729 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3731 struct nfs4_unlockdata *calldata = data;
3733 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3735 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3736 /* Note: exit _without_ running nfs4_locku_done */
3737 task->tk_action = NULL;
3740 calldata->timestamp = jiffies;
3741 if (nfs4_setup_sequence(calldata->server->nfs_client,
3742 &calldata->arg.seq_args,
3743 &calldata->res.seq_res, 1, task))
3745 rpc_call_start(task);
3748 static const struct rpc_call_ops nfs4_locku_ops = {
3749 .rpc_call_prepare = nfs4_locku_prepare,
3750 .rpc_call_done = nfs4_locku_done,
3751 .rpc_release = nfs4_locku_release_calldata,
3754 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3755 struct nfs_open_context *ctx,
3756 struct nfs4_lock_state *lsp,
3757 struct nfs_seqid *seqid)
3759 struct nfs4_unlockdata *data;
3760 struct rpc_message msg = {
3761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3762 .rpc_cred = ctx->cred,
3764 struct rpc_task_setup task_setup_data = {
3765 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3766 .rpc_message = &msg,
3767 .callback_ops = &nfs4_locku_ops,
3768 .workqueue = nfsiod_workqueue,
3769 .flags = RPC_TASK_ASYNC,
3772 /* Ensure this is an unlock - when canceling a lock, the
3773 * canceled lock is passed in, and it won't be an unlock.
3775 fl->fl_type = F_UNLCK;
3777 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3779 nfs_free_seqid(seqid);
3780 return ERR_PTR(-ENOMEM);
3783 msg.rpc_argp = &data->arg,
3784 msg.rpc_resp = &data->res,
3785 task_setup_data.callback_data = data;
3786 return rpc_run_task(&task_setup_data);
3789 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3791 struct nfs_inode *nfsi = NFS_I(state->inode);
3792 struct nfs_seqid *seqid;
3793 struct nfs4_lock_state *lsp;
3794 struct rpc_task *task;
3796 unsigned char fl_flags = request->fl_flags;
3798 status = nfs4_set_lock_state(state, request);
3799 /* Unlock _before_ we do the RPC call */
3800 request->fl_flags |= FL_EXISTS;
3801 down_read(&nfsi->rwsem);
3802 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3803 up_read(&nfsi->rwsem);
3806 up_read(&nfsi->rwsem);
3809 /* Is this a delegated lock? */
3810 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3812 lsp = request->fl_u.nfs4_fl.owner;
3813 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3817 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3818 status = PTR_ERR(task);
3821 status = nfs4_wait_for_completion_rpc_task(task);
3824 request->fl_flags = fl_flags;
3828 struct nfs4_lockdata {
3829 struct nfs_lock_args arg;
3830 struct nfs_lock_res res;
3831 struct nfs4_lock_state *lsp;
3832 struct nfs_open_context *ctx;
3833 struct file_lock fl;
3834 unsigned long timestamp;
3837 struct nfs_server *server;
3840 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3841 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3843 struct nfs4_lockdata *p;
3844 struct inode *inode = lsp->ls_state->inode;
3845 struct nfs_server *server = NFS_SERVER(inode);
3847 p = kzalloc(sizeof(*p), GFP_KERNEL);
3851 p->arg.fh = NFS_FH(inode);
3853 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3854 if (p->arg.open_seqid == NULL)
3856 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3857 if (p->arg.lock_seqid == NULL)
3858 goto out_free_seqid;
3859 p->arg.lock_stateid = &lsp->ls_stateid;
3860 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3861 p->arg.lock_owner.id = lsp->ls_id.id;
3862 p->res.lock_seqid = p->arg.lock_seqid;
3863 p->res.seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
3866 atomic_inc(&lsp->ls_count);
3867 p->ctx = get_nfs_open_context(ctx);
3868 memcpy(&p->fl, fl, sizeof(p->fl));
3871 nfs_free_seqid(p->arg.open_seqid);
3877 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3879 struct nfs4_lockdata *data = calldata;
3880 struct nfs4_state *state = data->lsp->ls_state;
3882 dprintk("%s: begin!\n", __func__);
3883 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3885 /* Do we need to do an open_to_lock_owner? */
3886 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3887 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3889 data->arg.open_stateid = &state->stateid;
3890 data->arg.new_lock_owner = 1;
3891 data->res.open_seqid = data->arg.open_seqid;
3893 data->arg.new_lock_owner = 0;
3894 data->timestamp = jiffies;
3895 if (nfs4_setup_sequence(data->server->nfs_client, &data->arg.seq_args,
3896 &data->res.seq_res, 1, task))
3898 rpc_call_start(task);
3899 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3902 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3904 struct nfs4_lockdata *data = calldata;
3906 dprintk("%s: begin!\n", __func__);
3908 nfs4_sequence_done_free_slot(data->server, &data->res.seq_res,
3911 data->rpc_status = task->tk_status;
3912 if (RPC_ASSASSINATED(task))
3914 if (data->arg.new_lock_owner != 0) {
3915 if (data->rpc_status == 0)
3916 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3920 if (data->rpc_status == 0) {
3921 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3922 sizeof(data->lsp->ls_stateid.data));
3923 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3924 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3927 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3930 static void nfs4_lock_release(void *calldata)
3932 struct nfs4_lockdata *data = calldata;
3934 dprintk("%s: begin!\n", __func__);
3935 nfs_free_seqid(data->arg.open_seqid);
3936 if (data->cancelled != 0) {
3937 struct rpc_task *task;
3938 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3939 data->arg.lock_seqid);
3942 dprintk("%s: cancelling lock!\n", __func__);
3944 nfs_free_seqid(data->arg.lock_seqid);
3945 nfs4_put_lock_state(data->lsp);
3946 put_nfs_open_context(data->ctx);
3948 dprintk("%s: done!\n", __func__);
3951 static const struct rpc_call_ops nfs4_lock_ops = {
3952 .rpc_call_prepare = nfs4_lock_prepare,
3953 .rpc_call_done = nfs4_lock_done,
3954 .rpc_release = nfs4_lock_release,
3957 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3959 struct nfs4_lockdata *data;
3960 struct rpc_task *task;
3961 struct rpc_message msg = {
3962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3963 .rpc_cred = state->owner->so_cred,
3965 struct rpc_task_setup task_setup_data = {
3966 .rpc_client = NFS_CLIENT(state->inode),
3967 .rpc_message = &msg,
3968 .callback_ops = &nfs4_lock_ops,
3969 .workqueue = nfsiod_workqueue,
3970 .flags = RPC_TASK_ASYNC,
3974 dprintk("%s: begin!\n", __func__);
3975 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3976 fl->fl_u.nfs4_fl.owner);
3980 data->arg.block = 1;
3982 data->arg.reclaim = 1;
3983 msg.rpc_argp = &data->arg,
3984 msg.rpc_resp = &data->res,
3985 task_setup_data.callback_data = data;
3986 task = rpc_run_task(&task_setup_data);
3988 return PTR_ERR(task);
3989 ret = nfs4_wait_for_completion_rpc_task(task);
3991 ret = data->rpc_status;
3993 data->cancelled = 1;
3995 dprintk("%s: done, ret = %d!\n", __func__, ret);
3999 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4001 struct nfs_server *server = NFS_SERVER(state->inode);
4002 struct nfs4_exception exception = { };
4006 /* Cache the lock if possible... */
4007 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4009 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
4010 if (err != -NFS4ERR_DELAY)
4012 nfs4_handle_exception(server, err, &exception);
4013 } while (exception.retry);
4017 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4019 struct nfs_server *server = NFS_SERVER(state->inode);
4020 struct nfs4_exception exception = { };
4023 err = nfs4_set_lock_state(state, request);
4027 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4029 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
4030 if (err != -NFS4ERR_DELAY)
4032 nfs4_handle_exception(server, err, &exception);
4033 } while (exception.retry);
4037 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4039 struct nfs_inode *nfsi = NFS_I(state->inode);
4040 unsigned char fl_flags = request->fl_flags;
4043 /* Is this a delegated open? */
4044 status = nfs4_set_lock_state(state, request);
4047 request->fl_flags |= FL_ACCESS;
4048 status = do_vfs_lock(request->fl_file, request);
4051 down_read(&nfsi->rwsem);
4052 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4053 /* Yes: cache locks! */
4054 /* ...but avoid races with delegation recall... */
4055 request->fl_flags = fl_flags & ~FL_SLEEP;
4056 status = do_vfs_lock(request->fl_file, request);
4059 status = _nfs4_do_setlk(state, cmd, request, 0);
4062 /* Note: we always want to sleep here! */
4063 request->fl_flags = fl_flags | FL_SLEEP;
4064 if (do_vfs_lock(request->fl_file, request) < 0)
4065 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
4067 up_read(&nfsi->rwsem);
4069 request->fl_flags = fl_flags;
4073 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4075 struct nfs4_exception exception = { };
4079 err = _nfs4_proc_setlk(state, cmd, request);
4080 if (err == -NFS4ERR_DENIED)
4082 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4084 } while (exception.retry);
4089 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4091 struct nfs_open_context *ctx;
4092 struct nfs4_state *state;
4093 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4096 /* verify open state */
4097 ctx = nfs_file_open_context(filp);
4100 if (request->fl_start < 0 || request->fl_end < 0)
4104 return nfs4_proc_getlk(state, F_GETLK, request);
4106 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4109 if (request->fl_type == F_UNLCK)
4110 return nfs4_proc_unlck(state, cmd, request);
4113 status = nfs4_proc_setlk(state, cmd, request);
4114 if ((status != -EAGAIN) || IS_SETLK(cmd))
4116 timeout = nfs4_set_lock_task_retry(timeout);
4117 status = -ERESTARTSYS;
4120 } while(status < 0);
4124 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4126 struct nfs_server *server = NFS_SERVER(state->inode);
4127 struct nfs4_exception exception = { };
4130 err = nfs4_set_lock_state(state, fl);
4134 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
4137 printk(KERN_ERR "%s: unhandled error %d.\n",
4142 case -NFS4ERR_EXPIRED:
4143 case -NFS4ERR_STALE_CLIENTID:
4144 case -NFS4ERR_STALE_STATEID:
4145 nfs4_schedule_state_recovery(server->nfs_client);
4149 * The show must go on: exit, but mark the
4150 * stateid as needing recovery.
4152 case -NFS4ERR_ADMIN_REVOKED:
4153 case -NFS4ERR_BAD_STATEID:
4154 case -NFS4ERR_OPENMODE:
4155 nfs4_state_mark_reclaim_nograce(server->nfs_client, state);
4159 case -NFS4ERR_DENIED:
4160 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4163 case -NFS4ERR_DELAY:
4166 err = nfs4_handle_exception(server, err, &exception);
4167 } while (exception.retry);
4172 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4174 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
4175 size_t buflen, int flags)
4177 struct inode *inode = dentry->d_inode;
4179 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4182 return nfs4_proc_set_acl(inode, buf, buflen);
4185 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
4186 * and that's what we'll do for e.g. user attributes that haven't been set.
4187 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
4188 * attributes in kernel-managed attribute namespaces. */
4189 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
4192 struct inode *inode = dentry->d_inode;
4194 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
4197 return nfs4_proc_get_acl(inode, buf, buflen);
4200 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
4202 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
4204 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4206 if (buf && buflen < len)
4209 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
4213 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4215 if (!((fattr->valid & NFS_ATTR_FATTR_FILEID) &&
4216 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4217 (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)))
4220 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4221 NFS_ATTR_FATTR_NLINK;
4222 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4226 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
4227 struct nfs4_fs_locations *fs_locations, struct page *page)
4229 struct nfs_server *server = NFS_SERVER(dir);
4231 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4232 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
4234 struct nfs4_fs_locations_arg args = {
4235 .dir_fh = NFS_FH(dir),
4240 struct nfs4_fs_locations_res res = {
4241 .fs_locations = fs_locations,
4243 struct rpc_message msg = {
4244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
4250 dprintk("%s: start\n", __func__);
4251 nfs_fattr_init(&fs_locations->fattr);
4252 fs_locations->server = server;
4253 fs_locations->nlocations = 0;
4254 status = nfs4_call_sync(server, &msg, &args, &res, 0);
4255 nfs_fixup_referral_attributes(&fs_locations->fattr);
4256 dprintk("%s: returned status = %d\n", __func__, status);
4260 #ifdef CONFIG_NFS_V4_1
4262 * nfs4_proc_exchange_id()
4264 * Since the clientid has expired, all compounds using sessions
4265 * associated with the stale clientid will be returning
4266 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
4267 * be in some phase of session reset.
4269 static int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
4271 nfs4_verifier verifier;
4272 struct nfs41_exchange_id_args args = {
4274 .flags = clp->cl_exchange_flags,
4276 struct nfs41_exchange_id_res res = {
4280 struct rpc_message msg = {
4281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
4288 dprintk("--> %s\n", __func__);
4289 BUG_ON(clp == NULL);
4291 p = (u32 *)verifier.data;
4292 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
4293 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
4294 args.verifier = &verifier;
4297 args.id_len = scnprintf(args.id, sizeof(args.id),
4300 rpc_peeraddr2str(clp->cl_rpcclient,
4302 clp->cl_id_uniquifier);
4304 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
4306 if (status != NFS4ERR_CLID_INUSE)
4312 if (++clp->cl_id_uniquifier == 0)
4316 dprintk("<-- %s status= %d\n", __func__, status);
4320 struct nfs4_get_lease_time_data {
4321 struct nfs4_get_lease_time_args *args;
4322 struct nfs4_get_lease_time_res *res;
4323 struct nfs_client *clp;
4326 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
4330 struct nfs4_get_lease_time_data *data =
4331 (struct nfs4_get_lease_time_data *)calldata;
4333 dprintk("--> %s\n", __func__);
4334 /* just setup sequence, do not trigger session recovery
4335 since we're invoked within one */
4336 ret = nfs41_setup_sequence(data->clp->cl_session,
4337 &data->args->la_seq_args,
4338 &data->res->lr_seq_res, 0, task);
4340 BUG_ON(ret == -EAGAIN);
4341 rpc_call_start(task);
4342 dprintk("<-- %s\n", __func__);
4346 * Called from nfs4_state_manager thread for session setup, so don't recover
4347 * from sequence operation or clientid errors.
4349 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
4351 struct nfs4_get_lease_time_data *data =
4352 (struct nfs4_get_lease_time_data *)calldata;
4354 dprintk("--> %s\n", __func__);
4355 nfs41_sequence_done(data->clp, &data->res->lr_seq_res, task->tk_status);
4356 switch (task->tk_status) {
4357 case -NFS4ERR_DELAY:
4358 case -NFS4ERR_GRACE:
4359 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
4360 rpc_delay(task, NFS4_POLL_RETRY_MIN);
4361 task->tk_status = 0;
4362 nfs4_restart_rpc(task, data->clp);
4365 nfs41_sequence_free_slot(data->clp, &data->res->lr_seq_res);
4366 dprintk("<-- %s\n", __func__);
4369 struct rpc_call_ops nfs4_get_lease_time_ops = {
4370 .rpc_call_prepare = nfs4_get_lease_time_prepare,
4371 .rpc_call_done = nfs4_get_lease_time_done,
4374 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
4376 struct rpc_task *task;
4377 struct nfs4_get_lease_time_args args;
4378 struct nfs4_get_lease_time_res res = {
4379 .lr_fsinfo = fsinfo,
4381 struct nfs4_get_lease_time_data data = {
4386 struct rpc_message msg = {
4387 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
4391 struct rpc_task_setup task_setup = {
4392 .rpc_client = clp->cl_rpcclient,
4393 .rpc_message = &msg,
4394 .callback_ops = &nfs4_get_lease_time_ops,
4395 .callback_data = &data
4399 res.lr_seq_res.sr_slotid = NFS4_MAX_SLOT_TABLE;
4400 dprintk("--> %s\n", __func__);
4401 task = rpc_run_task(&task_setup);
4404 status = PTR_ERR(task);
4406 status = task->tk_status;
4409 dprintk("<-- %s return %d\n", __func__, status);
4415 * Reset a slot table
4417 static int nfs4_reset_slot_table(struct nfs4_slot_table *tbl, int max_slots,
4418 int old_max_slots, int ivalue)
4423 dprintk("--> %s: max_reqs=%u, tbl %p\n", __func__, max_slots, tbl);
4426 * Until we have dynamic slot table adjustment, insist
4427 * upon the same slot table size
4429 if (max_slots != old_max_slots) {
4430 dprintk("%s reset slot table does't match old\n",
4432 ret = -EINVAL; /*XXX NFS4ERR_REQ_TOO_BIG ? */
4435 spin_lock(&tbl->slot_tbl_lock);
4436 for (i = 0; i < max_slots; ++i)
4437 tbl->slots[i].seq_nr = ivalue;
4438 tbl->highest_used_slotid = -1;
4439 spin_unlock(&tbl->slot_tbl_lock);
4440 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4441 tbl, tbl->slots, tbl->max_slots);
4443 dprintk("<-- %s: return %d\n", __func__, ret);
4448 * Reset the forechannel and backchannel slot tables
4450 static int nfs4_reset_slot_tables(struct nfs4_session *session)
4454 status = nfs4_reset_slot_table(&session->fc_slot_table,
4455 session->fc_attrs.max_reqs,
4456 session->fc_slot_table.max_slots,
4461 status = nfs4_reset_slot_table(&session->bc_slot_table,
4462 session->bc_attrs.max_reqs,
4463 session->bc_slot_table.max_slots,
4468 /* Destroy the slot table */
4469 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
4471 if (session->fc_slot_table.slots != NULL) {
4472 kfree(session->fc_slot_table.slots);
4473 session->fc_slot_table.slots = NULL;
4475 if (session->bc_slot_table.slots != NULL) {
4476 kfree(session->bc_slot_table.slots);
4477 session->bc_slot_table.slots = NULL;
4483 * Initialize slot table
4485 static int nfs4_init_slot_table(struct nfs4_slot_table *tbl,
4486 int max_slots, int ivalue)
4489 struct nfs4_slot *slot;
4492 BUG_ON(max_slots > NFS4_MAX_SLOT_TABLE);
4494 dprintk("--> %s: max_reqs=%u\n", __func__, max_slots);
4496 slot = kcalloc(max_slots, sizeof(struct nfs4_slot), GFP_KERNEL);
4499 for (i = 0; i < max_slots; ++i)
4500 slot[i].seq_nr = ivalue;
4503 spin_lock(&tbl->slot_tbl_lock);
4504 if (tbl->slots != NULL) {
4505 spin_unlock(&tbl->slot_tbl_lock);
4506 dprintk("%s: slot table already initialized. tbl=%p slots=%p\n",
4507 __func__, tbl, tbl->slots);
4511 tbl->max_slots = max_slots;
4513 tbl->highest_used_slotid = -1; /* no slot is currently used */
4514 spin_unlock(&tbl->slot_tbl_lock);
4515 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
4516 tbl, tbl->slots, tbl->max_slots);
4518 dprintk("<-- %s: return %d\n", __func__, ret);
4527 * Initialize the forechannel and backchannel tables
4529 static int nfs4_init_slot_tables(struct nfs4_session *session)
4533 status = nfs4_init_slot_table(&session->fc_slot_table,
4534 session->fc_attrs.max_reqs, 1);
4538 status = nfs4_init_slot_table(&session->bc_slot_table,
4539 session->bc_attrs.max_reqs, 0);
4541 nfs4_destroy_slot_tables(session);
4546 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
4548 struct nfs4_session *session;
4549 struct nfs4_slot_table *tbl;
4551 session = kzalloc(sizeof(struct nfs4_session), GFP_KERNEL);
4555 set_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state);
4557 * The create session reply races with the server back
4558 * channel probe. Mark the client NFS_CS_SESSION_INITING
4559 * so that the client back channel can find the
4562 clp->cl_cons_state = NFS_CS_SESSION_INITING;
4564 tbl = &session->fc_slot_table;
4565 spin_lock_init(&tbl->slot_tbl_lock);
4566 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
4568 tbl = &session->bc_slot_table;
4569 spin_lock_init(&tbl->slot_tbl_lock);
4570 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
4576 void nfs4_destroy_session(struct nfs4_session *session)
4578 nfs4_proc_destroy_session(session);
4579 dprintk("%s Destroy backchannel for xprt %p\n",
4580 __func__, session->clp->cl_rpcclient->cl_xprt);
4581 xprt_destroy_backchannel(session->clp->cl_rpcclient->cl_xprt,
4582 NFS41_BC_MIN_CALLBACKS);
4583 nfs4_destroy_slot_tables(session);
4588 * Initialize the values to be used by the client in CREATE_SESSION
4589 * If nfs4_init_session set the fore channel request and response sizes,
4592 * Set the back channel max_resp_sz_cached to zero to force the client to
4593 * always set csa_cachethis to FALSE because the current implementation
4594 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
4596 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
4598 struct nfs4_session *session = args->client->cl_session;
4599 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
4600 mxresp_sz = session->fc_attrs.max_resp_sz;
4603 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
4605 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
4606 /* Fore channel attributes */
4607 args->fc_attrs.headerpadsz = 0;
4608 args->fc_attrs.max_rqst_sz = mxrqst_sz;
4609 args->fc_attrs.max_resp_sz = mxresp_sz;
4610 args->fc_attrs.max_resp_sz_cached = mxresp_sz;
4611 args->fc_attrs.max_ops = NFS4_MAX_OPS;
4612 args->fc_attrs.max_reqs = session->clp->cl_rpcclient->cl_xprt->max_reqs;
4614 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
4615 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4617 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
4618 args->fc_attrs.max_resp_sz_cached, args->fc_attrs.max_ops,
4619 args->fc_attrs.max_reqs);
4621 /* Back channel attributes */
4622 args->bc_attrs.headerpadsz = 0;
4623 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
4624 args->bc_attrs.max_resp_sz = PAGE_SIZE;
4625 args->bc_attrs.max_resp_sz_cached = 0;
4626 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
4627 args->bc_attrs.max_reqs = 1;
4629 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
4630 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
4632 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
4633 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
4634 args->bc_attrs.max_reqs);
4637 static int _verify_channel_attr(char *chan, char *attr_name, u32 sent, u32 rcvd)
4641 printk(KERN_WARNING "%s: Session INVALID: %s channel %s increased. "
4642 "sent=%u rcvd=%u\n", __func__, chan, attr_name, sent, rcvd);
4646 #define _verify_fore_channel_attr(_name_) \
4647 _verify_channel_attr("fore", #_name_, \
4648 args->fc_attrs._name_, \
4649 session->fc_attrs._name_)
4651 #define _verify_back_channel_attr(_name_) \
4652 _verify_channel_attr("back", #_name_, \
4653 args->bc_attrs._name_, \
4654 session->bc_attrs._name_)
4657 * The server is not allowed to increase the fore channel header pad size,
4658 * maximum response size, or maximum number of operations.
4660 * The back channel attributes are only negotiatied down: We send what the
4661 * (back channel) server insists upon.
4663 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
4664 struct nfs4_session *session)
4668 ret |= _verify_fore_channel_attr(headerpadsz);
4669 ret |= _verify_fore_channel_attr(max_resp_sz);
4670 ret |= _verify_fore_channel_attr(max_ops);
4672 ret |= _verify_back_channel_attr(headerpadsz);
4673 ret |= _verify_back_channel_attr(max_rqst_sz);
4674 ret |= _verify_back_channel_attr(max_resp_sz);
4675 ret |= _verify_back_channel_attr(max_resp_sz_cached);
4676 ret |= _verify_back_channel_attr(max_ops);
4677 ret |= _verify_back_channel_attr(max_reqs);
4682 static int _nfs4_proc_create_session(struct nfs_client *clp)
4684 struct nfs4_session *session = clp->cl_session;
4685 struct nfs41_create_session_args args = {
4687 .cb_program = NFS4_CALLBACK,
4689 struct nfs41_create_session_res res = {
4692 struct rpc_message msg = {
4693 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
4699 nfs4_init_channel_attrs(&args);
4700 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
4702 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4705 /* Verify the session's negotiated channel_attrs values */
4706 status = nfs4_verify_channel_attrs(&args, session);
4708 /* Increment the clientid slot sequence id */
4716 * Issues a CREATE_SESSION operation to the server.
4717 * It is the responsibility of the caller to verify the session is
4718 * expired before calling this routine.
4720 int nfs4_proc_create_session(struct nfs_client *clp, int reset)
4724 struct nfs_fsinfo fsinfo;
4725 struct nfs4_session *session = clp->cl_session;
4727 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
4729 status = _nfs4_proc_create_session(clp);
4733 /* Init or reset the fore channel */
4735 status = nfs4_reset_slot_tables(session);
4737 status = nfs4_init_slot_tables(session);
4738 dprintk("fore channel slot table initialization returned %d\n", status);
4742 ptr = (unsigned *)&session->sess_id.data[0];
4743 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
4744 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
4747 /* Lease time is aleady set */
4750 /* Get the lease time */
4751 status = nfs4_proc_get_lease_time(clp, &fsinfo);
4753 /* Update lease time and schedule renewal */
4754 spin_lock(&clp->cl_lock);
4755 clp->cl_lease_time = fsinfo.lease_time * HZ;
4756 clp->cl_last_renewal = jiffies;
4757 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
4758 spin_unlock(&clp->cl_lock);
4760 nfs4_schedule_state_renewal(clp);
4763 dprintk("<-- %s\n", __func__);
4768 * Issue the over-the-wire RPC DESTROY_SESSION.
4769 * The caller must serialize access to this routine.
4771 int nfs4_proc_destroy_session(struct nfs4_session *session)
4774 struct rpc_message msg;
4776 dprintk("--> nfs4_proc_destroy_session\n");
4778 /* session is still being setup */
4779 if (session->clp->cl_cons_state != NFS_CS_READY)
4782 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
4783 msg.rpc_argp = session;
4784 msg.rpc_resp = NULL;
4785 msg.rpc_cred = NULL;
4786 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, 0);
4790 "Got error %d from the server on DESTROY_SESSION. "
4791 "Session has been destroyed regardless...\n", status);
4793 dprintk("<-- nfs4_proc_destroy_session\n");
4798 * Renew the cl_session lease.
4800 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
4802 struct nfs4_sequence_args args;
4803 struct nfs4_sequence_res res;
4805 struct rpc_message msg = {
4806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4812 args.sa_cache_this = 0;
4814 return nfs4_call_sync_sequence(clp, clp->cl_rpcclient, &msg, &args,
4818 void nfs41_sequence_call_done(struct rpc_task *task, void *data)
4820 struct nfs_client *clp = (struct nfs_client *)data;
4822 nfs41_sequence_done(clp, task->tk_msg.rpc_resp, task->tk_status);
4824 if (task->tk_status < 0) {
4825 dprintk("%s ERROR %d\n", __func__, task->tk_status);
4827 if (_nfs4_async_handle_error(task, NULL, clp, NULL)
4829 nfs4_restart_rpc(task, clp);
4833 nfs41_sequence_free_slot(clp, task->tk_msg.rpc_resp);
4834 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
4836 put_rpccred(task->tk_msg.rpc_cred);
4837 kfree(task->tk_msg.rpc_argp);
4838 kfree(task->tk_msg.rpc_resp);
4840 dprintk("<-- %s\n", __func__);
4843 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
4845 struct nfs_client *clp;
4846 struct nfs4_sequence_args *args;
4847 struct nfs4_sequence_res *res;
4849 clp = (struct nfs_client *)data;
4850 args = task->tk_msg.rpc_argp;
4851 res = task->tk_msg.rpc_resp;
4853 if (nfs4_setup_sequence(clp, args, res, 0, task))
4855 rpc_call_start(task);
4858 static const struct rpc_call_ops nfs41_sequence_ops = {
4859 .rpc_call_done = nfs41_sequence_call_done,
4860 .rpc_call_prepare = nfs41_sequence_prepare,
4863 static int nfs41_proc_async_sequence(struct nfs_client *clp,
4864 struct rpc_cred *cred)
4866 struct nfs4_sequence_args *args;
4867 struct nfs4_sequence_res *res;
4868 struct rpc_message msg = {
4869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
4873 args = kzalloc(sizeof(*args), GFP_KERNEL);
4876 res = kzalloc(sizeof(*res), GFP_KERNEL);
4881 res->sr_slotid = NFS4_MAX_SLOT_TABLE;
4882 msg.rpc_argp = args;
4885 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
4886 &nfs41_sequence_ops, (void *)clp);
4889 #endif /* CONFIG_NFS_V4_1 */
4891 struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
4892 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4893 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4894 .recover_open = nfs4_open_reclaim,
4895 .recover_lock = nfs4_lock_reclaim,
4896 .establish_clid = nfs4_init_clientid,
4897 .get_clid_cred = nfs4_get_setclientid_cred,
4900 #if defined(CONFIG_NFS_V4_1)
4901 struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
4902 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
4903 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
4904 .recover_open = nfs4_open_reclaim,
4905 .recover_lock = nfs4_lock_reclaim,
4906 .establish_clid = nfs4_proc_exchange_id,
4907 .get_clid_cred = nfs4_get_exchange_id_cred,
4909 #endif /* CONFIG_NFS_V4_1 */
4911 struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
4912 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4913 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4914 .recover_open = nfs4_open_expired,
4915 .recover_lock = nfs4_lock_expired,
4916 .establish_clid = nfs4_init_clientid,
4917 .get_clid_cred = nfs4_get_setclientid_cred,
4920 #if defined(CONFIG_NFS_V4_1)
4921 struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
4922 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
4923 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4924 .recover_open = nfs4_open_expired,
4925 .recover_lock = nfs4_lock_expired,
4926 .establish_clid = nfs4_proc_exchange_id,
4927 .get_clid_cred = nfs4_get_exchange_id_cred,
4929 #endif /* CONFIG_NFS_V4_1 */
4931 struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
4932 .sched_state_renewal = nfs4_proc_async_renew,
4933 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
4934 .renew_lease = nfs4_proc_renew,
4937 #if defined(CONFIG_NFS_V4_1)
4938 struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
4939 .sched_state_renewal = nfs41_proc_async_sequence,
4940 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
4941 .renew_lease = nfs4_proc_sequence,
4946 * Per minor version reboot and network partition recovery ops
4949 struct nfs4_state_recovery_ops *nfs4_reboot_recovery_ops[] = {
4950 &nfs40_reboot_recovery_ops,
4951 #if defined(CONFIG_NFS_V4_1)
4952 &nfs41_reboot_recovery_ops,
4956 struct nfs4_state_recovery_ops *nfs4_nograce_recovery_ops[] = {
4957 &nfs40_nograce_recovery_ops,
4958 #if defined(CONFIG_NFS_V4_1)
4959 &nfs41_nograce_recovery_ops,
4963 struct nfs4_state_maintenance_ops *nfs4_state_renewal_ops[] = {
4964 &nfs40_state_renewal_ops,
4965 #if defined(CONFIG_NFS_V4_1)
4966 &nfs41_state_renewal_ops,
4970 static const struct inode_operations nfs4_file_inode_operations = {
4971 .permission = nfs_permission,
4972 .getattr = nfs_getattr,
4973 .setattr = nfs_setattr,
4974 .getxattr = nfs4_getxattr,
4975 .setxattr = nfs4_setxattr,
4976 .listxattr = nfs4_listxattr,
4979 const struct nfs_rpc_ops nfs_v4_clientops = {
4980 .version = 4, /* protocol version */
4981 .dentry_ops = &nfs4_dentry_operations,
4982 .dir_inode_ops = &nfs4_dir_inode_operations,
4983 .file_inode_ops = &nfs4_file_inode_operations,
4984 .getroot = nfs4_proc_get_root,
4985 .getattr = nfs4_proc_getattr,
4986 .setattr = nfs4_proc_setattr,
4987 .lookupfh = nfs4_proc_lookupfh,
4988 .lookup = nfs4_proc_lookup,
4989 .access = nfs4_proc_access,
4990 .readlink = nfs4_proc_readlink,
4991 .create = nfs4_proc_create,
4992 .remove = nfs4_proc_remove,
4993 .unlink_setup = nfs4_proc_unlink_setup,
4994 .unlink_done = nfs4_proc_unlink_done,
4995 .rename = nfs4_proc_rename,
4996 .link = nfs4_proc_link,
4997 .symlink = nfs4_proc_symlink,
4998 .mkdir = nfs4_proc_mkdir,
4999 .rmdir = nfs4_proc_remove,
5000 .readdir = nfs4_proc_readdir,
5001 .mknod = nfs4_proc_mknod,
5002 .statfs = nfs4_proc_statfs,
5003 .fsinfo = nfs4_proc_fsinfo,
5004 .pathconf = nfs4_proc_pathconf,
5005 .set_capabilities = nfs4_server_capabilities,
5006 .decode_dirent = nfs4_decode_dirent,
5007 .read_setup = nfs4_proc_read_setup,
5008 .read_done = nfs4_read_done,
5009 .write_setup = nfs4_proc_write_setup,
5010 .write_done = nfs4_write_done,
5011 .commit_setup = nfs4_proc_commit_setup,
5012 .commit_done = nfs4_commit_done,
5013 .lock = nfs4_proc_lock,
5014 .clear_acl_cache = nfs4_zap_acl_attr,
5015 .close_context = nfs4_close_context,