4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/nfs_idmap.h>
55 #include <linux/sunrpc/bc_xprt.h>
56 #include <linux/xattr.h>
57 #include <linux/utsname.h>
58 #include <linux/freezer.h>
61 #include "delegation.h"
68 #define NFSDBG_FACILITY NFSDBG_PROC
70 #define NFS4_POLL_RETRY_MIN (HZ/10)
71 #define NFS4_POLL_RETRY_MAX (15*HZ)
73 #define NFS4_MAX_LOOP_ON_RECOVER (10)
76 static int _nfs4_proc_open(struct nfs4_opendata *data);
77 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
78 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
79 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
80 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
81 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
82 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
83 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
84 struct nfs_fattr *fattr, struct iattr *sattr,
85 struct nfs4_state *state);
86 #ifdef CONFIG_NFS_V4_1
87 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
88 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
90 /* Prevent leaks of NFSv4 errors into userland */
91 static int nfs4_map_errors(int err)
96 case -NFS4ERR_RESOURCE:
98 case -NFS4ERR_WRONGSEC:
100 case -NFS4ERR_BADOWNER:
101 case -NFS4ERR_BADNAME:
103 case -NFS4ERR_SHARE_DENIED:
105 case -NFS4ERR_MINOR_VERS_MISMATCH:
106 return -EPROTONOSUPPORT;
108 dprintk("%s could not handle NFSv4 error %d\n",
116 * This is our standard bitmap for GETATTR requests.
118 const u32 nfs4_fattr_bitmap[3] = {
120 | FATTR4_WORD0_CHANGE
123 | FATTR4_WORD0_FILEID,
125 | FATTR4_WORD1_NUMLINKS
127 | FATTR4_WORD1_OWNER_GROUP
128 | FATTR4_WORD1_RAWDEV
129 | FATTR4_WORD1_SPACE_USED
130 | FATTR4_WORD1_TIME_ACCESS
131 | FATTR4_WORD1_TIME_METADATA
132 | FATTR4_WORD1_TIME_MODIFY
135 static const u32 nfs4_pnfs_open_bitmap[3] = {
137 | FATTR4_WORD0_CHANGE
140 | FATTR4_WORD0_FILEID,
142 | FATTR4_WORD1_NUMLINKS
144 | FATTR4_WORD1_OWNER_GROUP
145 | FATTR4_WORD1_RAWDEV
146 | FATTR4_WORD1_SPACE_USED
147 | FATTR4_WORD1_TIME_ACCESS
148 | FATTR4_WORD1_TIME_METADATA
149 | FATTR4_WORD1_TIME_MODIFY,
150 FATTR4_WORD2_MDSTHRESHOLD
153 const u32 nfs4_statfs_bitmap[2] = {
154 FATTR4_WORD0_FILES_AVAIL
155 | FATTR4_WORD0_FILES_FREE
156 | FATTR4_WORD0_FILES_TOTAL,
157 FATTR4_WORD1_SPACE_AVAIL
158 | FATTR4_WORD1_SPACE_FREE
159 | FATTR4_WORD1_SPACE_TOTAL
162 const u32 nfs4_pathconf_bitmap[2] = {
164 | FATTR4_WORD0_MAXNAME,
168 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
169 | FATTR4_WORD0_MAXREAD
170 | FATTR4_WORD0_MAXWRITE
171 | FATTR4_WORD0_LEASE_TIME,
172 FATTR4_WORD1_TIME_DELTA
173 | FATTR4_WORD1_FS_LAYOUT_TYPES,
174 FATTR4_WORD2_LAYOUT_BLKSIZE
177 const u32 nfs4_fs_locations_bitmap[2] = {
179 | FATTR4_WORD0_CHANGE
182 | FATTR4_WORD0_FILEID
183 | FATTR4_WORD0_FS_LOCATIONS,
185 | FATTR4_WORD1_NUMLINKS
187 | FATTR4_WORD1_OWNER_GROUP
188 | FATTR4_WORD1_RAWDEV
189 | FATTR4_WORD1_SPACE_USED
190 | FATTR4_WORD1_TIME_ACCESS
191 | FATTR4_WORD1_TIME_METADATA
192 | FATTR4_WORD1_TIME_MODIFY
193 | FATTR4_WORD1_MOUNTED_ON_FILEID
196 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
197 struct nfs4_readdir_arg *readdir)
201 BUG_ON(readdir->count < 80);
203 readdir->cookie = cookie;
204 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
209 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
214 * NFSv4 servers do not return entries for '.' and '..'
215 * Therefore, we fake these entries here. We let '.'
216 * have cookie 0 and '..' have cookie 1. Note that
217 * when talking to the server, we always send cookie 0
220 start = p = kmap_atomic(*readdir->pages);
223 *p++ = xdr_one; /* next */
224 *p++ = xdr_zero; /* cookie, first word */
225 *p++ = xdr_one; /* cookie, second word */
226 *p++ = xdr_one; /* entry len */
227 memcpy(p, ".\0\0\0", 4); /* entry */
229 *p++ = xdr_one; /* bitmap length */
230 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
231 *p++ = htonl(8); /* attribute buffer length */
232 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
235 *p++ = xdr_one; /* next */
236 *p++ = xdr_zero; /* cookie, first word */
237 *p++ = xdr_two; /* cookie, second word */
238 *p++ = xdr_two; /* entry len */
239 memcpy(p, "..\0\0", 4); /* entry */
241 *p++ = xdr_one; /* bitmap length */
242 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
243 *p++ = htonl(8); /* attribute buffer length */
244 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
246 readdir->pgbase = (char *)p - (char *)start;
247 readdir->count -= readdir->pgbase;
248 kunmap_atomic(start);
251 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
257 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
258 nfs_wait_bit_killable, TASK_KILLABLE);
262 if (clp->cl_cons_state < 0)
263 return clp->cl_cons_state;
267 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
274 *timeout = NFS4_POLL_RETRY_MIN;
275 if (*timeout > NFS4_POLL_RETRY_MAX)
276 *timeout = NFS4_POLL_RETRY_MAX;
277 freezable_schedule_timeout_killable(*timeout);
278 if (fatal_signal_pending(current))
284 /* This is the error handling routine for processes that are allowed
287 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
289 struct nfs_client *clp = server->nfs_client;
290 struct nfs4_state *state = exception->state;
291 struct inode *inode = exception->inode;
294 exception->retry = 0;
298 case -NFS4ERR_OPENMODE:
299 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
300 nfs4_inode_return_delegation(inode);
301 exception->retry = 1;
306 nfs4_schedule_stateid_recovery(server, state);
307 goto wait_on_recovery;
308 case -NFS4ERR_DELEG_REVOKED:
309 case -NFS4ERR_ADMIN_REVOKED:
310 case -NFS4ERR_BAD_STATEID:
313 nfs_remove_bad_delegation(state->inode);
314 nfs4_schedule_stateid_recovery(server, state);
315 goto wait_on_recovery;
316 case -NFS4ERR_EXPIRED:
318 nfs4_schedule_stateid_recovery(server, state);
319 case -NFS4ERR_STALE_STATEID:
320 case -NFS4ERR_STALE_CLIENTID:
321 nfs4_schedule_lease_recovery(clp);
322 goto wait_on_recovery;
323 #if defined(CONFIG_NFS_V4_1)
324 case -NFS4ERR_BADSESSION:
325 case -NFS4ERR_BADSLOT:
326 case -NFS4ERR_BAD_HIGH_SLOT:
327 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
328 case -NFS4ERR_DEADSESSION:
329 case -NFS4ERR_SEQ_FALSE_RETRY:
330 case -NFS4ERR_SEQ_MISORDERED:
331 dprintk("%s ERROR: %d Reset session\n", __func__,
333 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
334 exception->retry = 1;
336 #endif /* defined(CONFIG_NFS_V4_1) */
337 case -NFS4ERR_FILE_OPEN:
338 if (exception->timeout > HZ) {
339 /* We have retried a decent amount, time to
348 ret = nfs4_delay(server->client, &exception->timeout);
351 case -NFS4ERR_RETRY_UNCACHED_REP:
352 case -NFS4ERR_OLD_STATEID:
353 exception->retry = 1;
355 case -NFS4ERR_BADOWNER:
356 /* The following works around a Linux server bug! */
357 case -NFS4ERR_BADNAME:
358 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
359 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
360 exception->retry = 1;
361 printk(KERN_WARNING "NFS: v4 server %s "
362 "does not accept raw "
364 "Reenabling the idmapper.\n",
365 server->nfs_client->cl_hostname);
368 /* We failed to handle the error */
369 return nfs4_map_errors(ret);
371 ret = nfs4_wait_clnt_recover(clp);
373 exception->retry = 1;
378 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
380 spin_lock(&clp->cl_lock);
381 if (time_before(clp->cl_last_renewal,timestamp))
382 clp->cl_last_renewal = timestamp;
383 spin_unlock(&clp->cl_lock);
386 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
388 do_renew_lease(server->nfs_client, timestamp);
391 #if defined(CONFIG_NFS_V4_1)
394 * nfs4_free_slot - free a slot and efficiently update slot table.
396 * freeing a slot is trivially done by clearing its respective bit
398 * If the freed slotid equals highest_used_slotid we want to update it
399 * so that the server would be able to size down the slot table if needed,
400 * otherwise we know that the highest_used_slotid is still in use.
401 * When updating highest_used_slotid there may be "holes" in the bitmap
402 * so we need to scan down from highest_used_slotid to 0 looking for the now
403 * highest slotid in use.
404 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
406 * Must be called while holding tbl->slot_tbl_lock
409 nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
411 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
412 /* clear used bit in bitmap */
413 __clear_bit(slotid, tbl->used_slots);
415 /* update highest_used_slotid when it is freed */
416 if (slotid == tbl->highest_used_slotid) {
417 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
418 if (slotid < tbl->max_slots)
419 tbl->highest_used_slotid = slotid;
421 tbl->highest_used_slotid = NFS4_NO_SLOT;
423 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
424 slotid, tbl->highest_used_slotid);
427 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
429 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
434 * Signal state manager thread if session fore channel is drained
436 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
438 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
439 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
440 nfs4_set_task_privileged, NULL);
444 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
447 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
448 complete(&ses->fc_slot_table.complete);
452 * Signal state manager thread if session back channel is drained
454 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
456 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
457 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
459 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
460 complete(&ses->bc_slot_table.complete);
463 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
465 struct nfs4_slot_table *tbl;
467 tbl = &res->sr_session->fc_slot_table;
469 /* just wake up the next guy waiting since
470 * we may have not consumed a slot after all */
471 dprintk("%s: No slot\n", __func__);
475 spin_lock(&tbl->slot_tbl_lock);
476 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
477 nfs4_check_drain_fc_complete(res->sr_session);
478 spin_unlock(&tbl->slot_tbl_lock);
482 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
484 unsigned long timestamp;
485 struct nfs_client *clp;
488 * sr_status remains 1 if an RPC level error occurred. The server
489 * may or may not have processed the sequence operation..
490 * Proceed as if the server received and processed the sequence
493 if (res->sr_status == 1)
494 res->sr_status = NFS_OK;
496 /* don't increment the sequence number if the task wasn't sent */
497 if (!RPC_WAS_SENT(task))
500 /* Check the SEQUENCE operation status */
501 switch (res->sr_status) {
503 /* Update the slot's sequence and clientid lease timer */
504 ++res->sr_slot->seq_nr;
505 timestamp = res->sr_renewal_time;
506 clp = res->sr_session->clp;
507 do_renew_lease(clp, timestamp);
508 /* Check sequence flags */
509 if (res->sr_status_flags != 0)
510 nfs4_schedule_lease_recovery(clp);
513 /* The server detected a resend of the RPC call and
514 * returned NFS4ERR_DELAY as per Section 2.10.6.2
517 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
519 res->sr_slot - res->sr_session->fc_slot_table.slots,
520 res->sr_slot->seq_nr);
523 /* Just update the slot sequence no. */
524 ++res->sr_slot->seq_nr;
527 /* The session may be reset by one of the error handlers. */
528 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
529 nfs41_sequence_free_slot(res);
532 if (!rpc_restart_call(task))
534 rpc_delay(task, NFS4_POLL_RETRY_MAX);
538 static int nfs4_sequence_done(struct rpc_task *task,
539 struct nfs4_sequence_res *res)
541 if (res->sr_session == NULL)
543 return nfs41_sequence_done(task, res);
547 * nfs4_find_slot - efficiently look for a free slot
549 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
550 * If found, we mark the slot as used, update the highest_used_slotid,
551 * and respectively set up the sequence operation args.
552 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
554 * Note: must be called with under the slot_tbl_lock.
557 nfs4_find_slot(struct nfs4_slot_table *tbl)
560 u32 ret_id = NFS4_NO_SLOT;
562 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
563 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
565 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
566 if (slotid >= tbl->max_slots)
568 __set_bit(slotid, tbl->used_slots);
569 if (slotid > tbl->highest_used_slotid ||
570 tbl->highest_used_slotid == NFS4_NO_SLOT)
571 tbl->highest_used_slotid = slotid;
574 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
575 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
579 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
580 struct nfs4_sequence_res *res, int cache_reply)
582 args->sa_session = NULL;
583 args->sa_cache_this = 0;
585 args->sa_cache_this = 1;
586 res->sr_session = NULL;
590 int nfs41_setup_sequence(struct nfs4_session *session,
591 struct nfs4_sequence_args *args,
592 struct nfs4_sequence_res *res,
593 struct rpc_task *task)
595 struct nfs4_slot *slot;
596 struct nfs4_slot_table *tbl;
599 dprintk("--> %s\n", __func__);
600 /* slot already allocated? */
601 if (res->sr_slot != NULL)
604 tbl = &session->fc_slot_table;
606 spin_lock(&tbl->slot_tbl_lock);
607 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
608 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
609 /* The state manager will wait until the slot table is empty */
610 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
611 spin_unlock(&tbl->slot_tbl_lock);
612 dprintk("%s session is draining\n", __func__);
616 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
617 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
618 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
619 spin_unlock(&tbl->slot_tbl_lock);
620 dprintk("%s enforce FIFO order\n", __func__);
624 slotid = nfs4_find_slot(tbl);
625 if (slotid == NFS4_NO_SLOT) {
626 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
627 spin_unlock(&tbl->slot_tbl_lock);
628 dprintk("<-- %s: no free slots\n", __func__);
631 spin_unlock(&tbl->slot_tbl_lock);
633 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
634 slot = tbl->slots + slotid;
635 args->sa_session = session;
636 args->sa_slotid = slotid;
638 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
640 res->sr_session = session;
642 res->sr_renewal_time = jiffies;
643 res->sr_status_flags = 0;
645 * sr_status is only set in decode_sequence, and so will remain
646 * set to 1 if an rpc level failure occurs.
651 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
653 int nfs4_setup_sequence(const struct nfs_server *server,
654 struct nfs4_sequence_args *args,
655 struct nfs4_sequence_res *res,
656 struct rpc_task *task)
658 struct nfs4_session *session = nfs4_get_session(server);
664 dprintk("--> %s clp %p session %p sr_slot %td\n",
665 __func__, session->clp, session, res->sr_slot ?
666 res->sr_slot - session->fc_slot_table.slots : -1);
668 ret = nfs41_setup_sequence(session, args, res, task);
670 dprintk("<-- %s status=%d\n", __func__, ret);
674 struct nfs41_call_sync_data {
675 const struct nfs_server *seq_server;
676 struct nfs4_sequence_args *seq_args;
677 struct nfs4_sequence_res *seq_res;
680 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
682 struct nfs41_call_sync_data *data = calldata;
684 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
686 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
687 data->seq_res, task))
689 rpc_call_start(task);
692 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
694 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
695 nfs41_call_sync_prepare(task, calldata);
698 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
700 struct nfs41_call_sync_data *data = calldata;
702 nfs41_sequence_done(task, data->seq_res);
705 static const struct rpc_call_ops nfs41_call_sync_ops = {
706 .rpc_call_prepare = nfs41_call_sync_prepare,
707 .rpc_call_done = nfs41_call_sync_done,
710 static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
711 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
712 .rpc_call_done = nfs41_call_sync_done,
715 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
716 struct nfs_server *server,
717 struct rpc_message *msg,
718 struct nfs4_sequence_args *args,
719 struct nfs4_sequence_res *res,
723 struct rpc_task *task;
724 struct nfs41_call_sync_data data = {
725 .seq_server = server,
729 struct rpc_task_setup task_setup = {
732 .callback_ops = &nfs41_call_sync_ops,
733 .callback_data = &data
737 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
738 task = rpc_run_task(&task_setup);
742 ret = task->tk_status;
748 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
749 struct nfs_server *server,
750 struct rpc_message *msg,
751 struct nfs4_sequence_args *args,
752 struct nfs4_sequence_res *res,
755 nfs41_init_sequence(args, res, cache_reply);
756 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
761 void nfs41_init_sequence(struct nfs4_sequence_args *args,
762 struct nfs4_sequence_res *res, int cache_reply)
766 static int nfs4_sequence_done(struct rpc_task *task,
767 struct nfs4_sequence_res *res)
771 #endif /* CONFIG_NFS_V4_1 */
773 int _nfs4_call_sync(struct rpc_clnt *clnt,
774 struct nfs_server *server,
775 struct rpc_message *msg,
776 struct nfs4_sequence_args *args,
777 struct nfs4_sequence_res *res,
780 nfs41_init_sequence(args, res, cache_reply);
781 return rpc_call_sync(clnt, msg, 0);
785 int nfs4_call_sync(struct rpc_clnt *clnt,
786 struct nfs_server *server,
787 struct rpc_message *msg,
788 struct nfs4_sequence_args *args,
789 struct nfs4_sequence_res *res,
792 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
793 args, res, cache_reply);
796 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
798 struct nfs_inode *nfsi = NFS_I(dir);
800 spin_lock(&dir->i_lock);
801 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
802 if (!cinfo->atomic || cinfo->before != dir->i_version)
803 nfs_force_lookup_revalidate(dir);
804 dir->i_version = cinfo->after;
805 spin_unlock(&dir->i_lock);
808 struct nfs4_opendata {
810 struct nfs_openargs o_arg;
811 struct nfs_openres o_res;
812 struct nfs_open_confirmargs c_arg;
813 struct nfs_open_confirmres c_res;
814 struct nfs4_string owner_name;
815 struct nfs4_string group_name;
816 struct nfs_fattr f_attr;
818 struct dentry *dentry;
819 struct nfs4_state_owner *owner;
820 struct nfs4_state *state;
822 unsigned long timestamp;
823 unsigned int rpc_done : 1;
829 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
831 p->o_res.f_attr = &p->f_attr;
832 p->o_res.seqid = p->o_arg.seqid;
833 p->c_res.seqid = p->c_arg.seqid;
834 p->o_res.server = p->o_arg.server;
835 nfs_fattr_init(&p->f_attr);
836 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
839 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
840 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
841 const struct iattr *attrs,
844 struct dentry *parent = dget_parent(dentry);
845 struct inode *dir = parent->d_inode;
846 struct nfs_server *server = NFS_SERVER(dir);
847 struct nfs4_opendata *p;
849 p = kzalloc(sizeof(*p), gfp_mask);
852 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
853 if (p->o_arg.seqid == NULL)
855 nfs_sb_active(dentry->d_sb);
856 p->dentry = dget(dentry);
859 atomic_inc(&sp->so_count);
860 p->o_arg.fh = NFS_FH(dir);
861 p->o_arg.open_flags = flags;
862 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
863 p->o_arg.clientid = server->nfs_client->cl_clientid;
864 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
865 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
866 p->o_arg.name = &dentry->d_name;
867 p->o_arg.server = server;
868 p->o_arg.bitmask = server->attr_bitmask;
869 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
870 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
871 if (attrs != NULL && attrs->ia_valid != 0) {
874 p->o_arg.u.attrs = &p->attrs;
875 memcpy(&p->attrs, attrs, sizeof(p->attrs));
878 verf[1] = current->pid;
879 memcpy(p->o_arg.u.verifier.data, verf,
880 sizeof(p->o_arg.u.verifier.data));
882 p->c_arg.fh = &p->o_res.fh;
883 p->c_arg.stateid = &p->o_res.stateid;
884 p->c_arg.seqid = p->o_arg.seqid;
885 nfs4_init_opendata_res(p);
895 static void nfs4_opendata_free(struct kref *kref)
897 struct nfs4_opendata *p = container_of(kref,
898 struct nfs4_opendata, kref);
899 struct super_block *sb = p->dentry->d_sb;
901 nfs_free_seqid(p->o_arg.seqid);
902 if (p->state != NULL)
903 nfs4_put_open_state(p->state);
904 nfs4_put_state_owner(p->owner);
908 nfs_fattr_free_names(&p->f_attr);
912 static void nfs4_opendata_put(struct nfs4_opendata *p)
915 kref_put(&p->kref, nfs4_opendata_free);
918 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
922 ret = rpc_wait_for_completion_task(task);
926 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
930 if (open_mode & (O_EXCL|O_TRUNC))
932 switch (mode & (FMODE_READ|FMODE_WRITE)) {
934 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
935 && state->n_rdonly != 0;
938 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
939 && state->n_wronly != 0;
941 case FMODE_READ|FMODE_WRITE:
942 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
943 && state->n_rdwr != 0;
949 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
951 if (delegation == NULL)
953 if ((delegation->type & fmode) != fmode)
955 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
957 nfs_mark_delegation_referenced(delegation);
961 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
970 case FMODE_READ|FMODE_WRITE:
973 nfs4_state_set_mode_locked(state, state->state | fmode);
976 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
978 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
979 nfs4_stateid_copy(&state->stateid, stateid);
980 nfs4_stateid_copy(&state->open_stateid, stateid);
983 set_bit(NFS_O_RDONLY_STATE, &state->flags);
986 set_bit(NFS_O_WRONLY_STATE, &state->flags);
988 case FMODE_READ|FMODE_WRITE:
989 set_bit(NFS_O_RDWR_STATE, &state->flags);
993 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
995 write_seqlock(&state->seqlock);
996 nfs_set_open_stateid_locked(state, stateid, fmode);
997 write_sequnlock(&state->seqlock);
1000 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1003 * Protect the call to nfs4_state_set_mode_locked and
1004 * serialise the stateid update
1006 write_seqlock(&state->seqlock);
1007 if (deleg_stateid != NULL) {
1008 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1009 set_bit(NFS_DELEGATED_STATE, &state->flags);
1011 if (open_stateid != NULL)
1012 nfs_set_open_stateid_locked(state, open_stateid, fmode);
1013 write_sequnlock(&state->seqlock);
1014 spin_lock(&state->owner->so_lock);
1015 update_open_stateflags(state, fmode);
1016 spin_unlock(&state->owner->so_lock);
1019 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
1021 struct nfs_inode *nfsi = NFS_I(state->inode);
1022 struct nfs_delegation *deleg_cur;
1025 fmode &= (FMODE_READ|FMODE_WRITE);
1028 deleg_cur = rcu_dereference(nfsi->delegation);
1029 if (deleg_cur == NULL)
1032 spin_lock(&deleg_cur->lock);
1033 if (nfsi->delegation != deleg_cur ||
1034 (deleg_cur->type & fmode) != fmode)
1035 goto no_delegation_unlock;
1037 if (delegation == NULL)
1038 delegation = &deleg_cur->stateid;
1039 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1040 goto no_delegation_unlock;
1042 nfs_mark_delegation_referenced(deleg_cur);
1043 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1045 no_delegation_unlock:
1046 spin_unlock(&deleg_cur->lock);
1050 if (!ret && open_stateid != NULL) {
1051 __update_open_stateid(state, open_stateid, NULL, fmode);
1059 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1061 struct nfs_delegation *delegation;
1064 delegation = rcu_dereference(NFS_I(inode)->delegation);
1065 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1070 nfs4_inode_return_delegation(inode);
1073 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1075 struct nfs4_state *state = opendata->state;
1076 struct nfs_inode *nfsi = NFS_I(state->inode);
1077 struct nfs_delegation *delegation;
1078 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1079 fmode_t fmode = opendata->o_arg.fmode;
1080 nfs4_stateid stateid;
1084 if (can_open_cached(state, fmode, open_mode)) {
1085 spin_lock(&state->owner->so_lock);
1086 if (can_open_cached(state, fmode, open_mode)) {
1087 update_open_stateflags(state, fmode);
1088 spin_unlock(&state->owner->so_lock);
1089 goto out_return_state;
1091 spin_unlock(&state->owner->so_lock);
1094 delegation = rcu_dereference(nfsi->delegation);
1095 if (!can_open_delegated(delegation, fmode)) {
1099 /* Save the delegation */
1100 nfs4_stateid_copy(&stateid, &delegation->stateid);
1102 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1107 /* Try to update the stateid using the delegation */
1108 if (update_open_stateid(state, NULL, &stateid, fmode))
1109 goto out_return_state;
1112 return ERR_PTR(ret);
1114 atomic_inc(&state->count);
1118 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1120 struct inode *inode;
1121 struct nfs4_state *state = NULL;
1122 struct nfs_delegation *delegation;
1125 if (!data->rpc_done) {
1126 state = nfs4_try_open_cached(data);
1131 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1133 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1134 ret = PTR_ERR(inode);
1138 state = nfs4_get_open_state(inode, data->owner);
1141 if (data->o_res.delegation_type != 0) {
1142 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
1143 int delegation_flags = 0;
1146 delegation = rcu_dereference(NFS_I(inode)->delegation);
1148 delegation_flags = delegation->flags;
1150 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1151 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1152 "returning a delegation for "
1153 "OPEN(CLAIM_DELEGATE_CUR)\n",
1155 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1156 nfs_inode_set_delegation(state->inode,
1157 data->owner->so_cred,
1160 nfs_inode_reclaim_delegation(state->inode,
1161 data->owner->so_cred,
1165 update_open_stateid(state, &data->o_res.stateid, NULL,
1173 return ERR_PTR(ret);
1176 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1178 struct nfs_inode *nfsi = NFS_I(state->inode);
1179 struct nfs_open_context *ctx;
1181 spin_lock(&state->inode->i_lock);
1182 list_for_each_entry(ctx, &nfsi->open_files, list) {
1183 if (ctx->state != state)
1185 get_nfs_open_context(ctx);
1186 spin_unlock(&state->inode->i_lock);
1189 spin_unlock(&state->inode->i_lock);
1190 return ERR_PTR(-ENOENT);
1193 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1195 struct nfs4_opendata *opendata;
1197 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1198 if (opendata == NULL)
1199 return ERR_PTR(-ENOMEM);
1200 opendata->state = state;
1201 atomic_inc(&state->count);
1205 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1207 struct nfs4_state *newstate;
1210 opendata->o_arg.open_flags = 0;
1211 opendata->o_arg.fmode = fmode;
1212 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1213 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1214 nfs4_init_opendata_res(opendata);
1215 ret = _nfs4_recover_proc_open(opendata);
1218 newstate = nfs4_opendata_to_nfs4_state(opendata);
1219 if (IS_ERR(newstate))
1220 return PTR_ERR(newstate);
1221 nfs4_close_state(newstate, fmode);
1226 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1228 struct nfs4_state *newstate;
1231 /* memory barrier prior to reading state->n_* */
1232 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1234 if (state->n_rdwr != 0) {
1235 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1236 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1239 if (newstate != state)
1242 if (state->n_wronly != 0) {
1243 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1244 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1247 if (newstate != state)
1250 if (state->n_rdonly != 0) {
1251 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1252 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1255 if (newstate != state)
1259 * We may have performed cached opens for all three recoveries.
1260 * Check if we need to update the current stateid.
1262 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1263 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1264 write_seqlock(&state->seqlock);
1265 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1266 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1267 write_sequnlock(&state->seqlock);
1274 * reclaim state on the server after a reboot.
1276 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1278 struct nfs_delegation *delegation;
1279 struct nfs4_opendata *opendata;
1280 fmode_t delegation_type = 0;
1283 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1284 if (IS_ERR(opendata))
1285 return PTR_ERR(opendata);
1286 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1287 opendata->o_arg.fh = NFS_FH(state->inode);
1289 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1290 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1291 delegation_type = delegation->type;
1293 opendata->o_arg.u.delegation_type = delegation_type;
1294 status = nfs4_open_recover(opendata, state);
1295 nfs4_opendata_put(opendata);
1299 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1301 struct nfs_server *server = NFS_SERVER(state->inode);
1302 struct nfs4_exception exception = { };
1305 err = _nfs4_do_open_reclaim(ctx, state);
1306 if (err != -NFS4ERR_DELAY)
1308 nfs4_handle_exception(server, err, &exception);
1309 } while (exception.retry);
1313 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1315 struct nfs_open_context *ctx;
1318 ctx = nfs4_state_find_open_context(state);
1320 return PTR_ERR(ctx);
1321 ret = nfs4_do_open_reclaim(ctx, state);
1322 put_nfs_open_context(ctx);
1326 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1328 struct nfs4_opendata *opendata;
1331 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1332 if (IS_ERR(opendata))
1333 return PTR_ERR(opendata);
1334 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1335 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1336 ret = nfs4_open_recover(opendata, state);
1337 nfs4_opendata_put(opendata);
1341 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1343 struct nfs4_exception exception = { };
1344 struct nfs_server *server = NFS_SERVER(state->inode);
1347 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1353 case -NFS4ERR_BADSESSION:
1354 case -NFS4ERR_BADSLOT:
1355 case -NFS4ERR_BAD_HIGH_SLOT:
1356 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1357 case -NFS4ERR_DEADSESSION:
1358 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1360 case -NFS4ERR_STALE_CLIENTID:
1361 case -NFS4ERR_STALE_STATEID:
1362 case -NFS4ERR_EXPIRED:
1363 /* Don't recall a delegation if it was lost */
1364 nfs4_schedule_lease_recovery(server->nfs_client);
1368 * The show must go on: exit, but mark the
1369 * stateid as needing recovery.
1371 case -NFS4ERR_DELEG_REVOKED:
1372 case -NFS4ERR_ADMIN_REVOKED:
1373 case -NFS4ERR_BAD_STATEID:
1374 nfs_inode_find_state_and_recover(state->inode,
1376 nfs4_schedule_stateid_recovery(server, state);
1379 * User RPCSEC_GSS context has expired.
1380 * We cannot recover this stateid now, so
1381 * skip it and allow recovery thread to
1388 err = nfs4_handle_exception(server, err, &exception);
1389 } while (exception.retry);
1394 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1396 struct nfs4_opendata *data = calldata;
1398 data->rpc_status = task->tk_status;
1399 if (data->rpc_status == 0) {
1400 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1401 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1402 renew_lease(data->o_res.server, data->timestamp);
1407 static void nfs4_open_confirm_release(void *calldata)
1409 struct nfs4_opendata *data = calldata;
1410 struct nfs4_state *state = NULL;
1412 /* If this request hasn't been cancelled, do nothing */
1413 if (data->cancelled == 0)
1415 /* In case of error, no cleanup! */
1416 if (!data->rpc_done)
1418 state = nfs4_opendata_to_nfs4_state(data);
1420 nfs4_close_state(state, data->o_arg.fmode);
1422 nfs4_opendata_put(data);
1425 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1426 .rpc_call_done = nfs4_open_confirm_done,
1427 .rpc_release = nfs4_open_confirm_release,
1431 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1433 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1435 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1436 struct rpc_task *task;
1437 struct rpc_message msg = {
1438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1439 .rpc_argp = &data->c_arg,
1440 .rpc_resp = &data->c_res,
1441 .rpc_cred = data->owner->so_cred,
1443 struct rpc_task_setup task_setup_data = {
1444 .rpc_client = server->client,
1445 .rpc_message = &msg,
1446 .callback_ops = &nfs4_open_confirm_ops,
1447 .callback_data = data,
1448 .workqueue = nfsiod_workqueue,
1449 .flags = RPC_TASK_ASYNC,
1453 kref_get(&data->kref);
1455 data->rpc_status = 0;
1456 data->timestamp = jiffies;
1457 task = rpc_run_task(&task_setup_data);
1459 return PTR_ERR(task);
1460 status = nfs4_wait_for_completion_rpc_task(task);
1462 data->cancelled = 1;
1465 status = data->rpc_status;
1470 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1472 struct nfs4_opendata *data = calldata;
1473 struct nfs4_state_owner *sp = data->owner;
1475 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1478 * Check if we still need to send an OPEN call, or if we can use
1479 * a delegation instead.
1481 if (data->state != NULL) {
1482 struct nfs_delegation *delegation;
1484 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1487 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1488 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1489 can_open_delegated(delegation, data->o_arg.fmode))
1490 goto unlock_no_action;
1493 /* Update client id. */
1494 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1495 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1496 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1497 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1499 data->timestamp = jiffies;
1500 if (nfs4_setup_sequence(data->o_arg.server,
1501 &data->o_arg.seq_args,
1502 &data->o_res.seq_res, task))
1504 rpc_call_start(task);
1509 task->tk_action = NULL;
1513 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1515 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1516 nfs4_open_prepare(task, calldata);
1519 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1521 struct nfs4_opendata *data = calldata;
1523 data->rpc_status = task->tk_status;
1525 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1528 if (task->tk_status == 0) {
1529 switch (data->o_res.f_attr->mode & S_IFMT) {
1533 data->rpc_status = -ELOOP;
1536 data->rpc_status = -EISDIR;
1539 data->rpc_status = -ENOTDIR;
1541 renew_lease(data->o_res.server, data->timestamp);
1542 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1543 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1548 static void nfs4_open_release(void *calldata)
1550 struct nfs4_opendata *data = calldata;
1551 struct nfs4_state *state = NULL;
1553 /* If this request hasn't been cancelled, do nothing */
1554 if (data->cancelled == 0)
1556 /* In case of error, no cleanup! */
1557 if (data->rpc_status != 0 || !data->rpc_done)
1559 /* In case we need an open_confirm, no cleanup! */
1560 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1562 state = nfs4_opendata_to_nfs4_state(data);
1564 nfs4_close_state(state, data->o_arg.fmode);
1566 nfs4_opendata_put(data);
1569 static const struct rpc_call_ops nfs4_open_ops = {
1570 .rpc_call_prepare = nfs4_open_prepare,
1571 .rpc_call_done = nfs4_open_done,
1572 .rpc_release = nfs4_open_release,
1575 static const struct rpc_call_ops nfs4_recover_open_ops = {
1576 .rpc_call_prepare = nfs4_recover_open_prepare,
1577 .rpc_call_done = nfs4_open_done,
1578 .rpc_release = nfs4_open_release,
1581 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1583 struct inode *dir = data->dir->d_inode;
1584 struct nfs_server *server = NFS_SERVER(dir);
1585 struct nfs_openargs *o_arg = &data->o_arg;
1586 struct nfs_openres *o_res = &data->o_res;
1587 struct rpc_task *task;
1588 struct rpc_message msg = {
1589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1592 .rpc_cred = data->owner->so_cred,
1594 struct rpc_task_setup task_setup_data = {
1595 .rpc_client = server->client,
1596 .rpc_message = &msg,
1597 .callback_ops = &nfs4_open_ops,
1598 .callback_data = data,
1599 .workqueue = nfsiod_workqueue,
1600 .flags = RPC_TASK_ASYNC,
1604 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1605 kref_get(&data->kref);
1607 data->rpc_status = 0;
1608 data->cancelled = 0;
1610 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1611 task = rpc_run_task(&task_setup_data);
1613 return PTR_ERR(task);
1614 status = nfs4_wait_for_completion_rpc_task(task);
1616 data->cancelled = 1;
1619 status = data->rpc_status;
1625 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1627 struct inode *dir = data->dir->d_inode;
1628 struct nfs_openres *o_res = &data->o_res;
1631 status = nfs4_run_open_task(data, 1);
1632 if (status != 0 || !data->rpc_done)
1635 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1637 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1638 status = _nfs4_proc_open_confirm(data);
1647 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1649 static int _nfs4_proc_open(struct nfs4_opendata *data)
1651 struct inode *dir = data->dir->d_inode;
1652 struct nfs_server *server = NFS_SERVER(dir);
1653 struct nfs_openargs *o_arg = &data->o_arg;
1654 struct nfs_openres *o_res = &data->o_res;
1657 status = nfs4_run_open_task(data, 0);
1658 if (!data->rpc_done)
1661 if (status == -NFS4ERR_BADNAME &&
1662 !(o_arg->open_flags & O_CREAT))
1667 nfs_fattr_map_and_free_names(server, &data->f_attr);
1669 if (o_arg->open_flags & O_CREAT)
1670 update_changeattr(dir, &o_res->cinfo);
1671 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1672 server->caps &= ~NFS_CAP_POSIX_LOCK;
1673 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1674 status = _nfs4_proc_open_confirm(data);
1678 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1679 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1683 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1688 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1689 ret = nfs4_wait_clnt_recover(clp);
1692 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1693 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1695 nfs4_schedule_state_manager(clp);
1701 static int nfs4_recover_expired_lease(struct nfs_server *server)
1703 return nfs4_client_recover_expired_lease(server->nfs_client);
1708 * reclaim state on the server after a network partition.
1709 * Assumes caller holds the appropriate lock
1711 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1713 struct nfs4_opendata *opendata;
1716 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1717 if (IS_ERR(opendata))
1718 return PTR_ERR(opendata);
1719 ret = nfs4_open_recover(opendata, state);
1721 d_drop(ctx->dentry);
1722 nfs4_opendata_put(opendata);
1726 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1728 struct nfs_server *server = NFS_SERVER(state->inode);
1729 struct nfs4_exception exception = { };
1733 err = _nfs4_open_expired(ctx, state);
1737 case -NFS4ERR_GRACE:
1738 case -NFS4ERR_DELAY:
1739 nfs4_handle_exception(server, err, &exception);
1742 } while (exception.retry);
1747 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1749 struct nfs_open_context *ctx;
1752 ctx = nfs4_state_find_open_context(state);
1754 return PTR_ERR(ctx);
1755 ret = nfs4_do_open_expired(ctx, state);
1756 put_nfs_open_context(ctx);
1760 #if defined(CONFIG_NFS_V4_1)
1761 static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
1763 struct nfs_server *server = NFS_SERVER(state->inode);
1764 nfs4_stateid *stateid = &state->stateid;
1767 /* If a state reset has been done, test_stateid is unneeded */
1768 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1771 status = nfs41_test_stateid(server, stateid);
1772 if (status != NFS_OK) {
1773 /* Free the stateid unless the server explicitly
1774 * informs us the stateid is unrecognized. */
1775 if (status != -NFS4ERR_BAD_STATEID)
1776 nfs41_free_stateid(server, stateid);
1778 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1783 * nfs41_check_open_stateid - possibly free an open stateid
1785 * @state: NFSv4 state for an inode
1787 * Returns NFS_OK if recovery for this stateid is now finished.
1788 * Otherwise a negative NFS4ERR value is returned.
1790 static int nfs41_check_open_stateid(struct nfs4_state *state)
1792 struct nfs_server *server = NFS_SERVER(state->inode);
1793 nfs4_stateid *stateid = &state->stateid;
1796 /* If a state reset has been done, test_stateid is unneeded */
1797 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1798 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1799 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1800 return -NFS4ERR_BAD_STATEID;
1802 status = nfs41_test_stateid(server, stateid);
1803 if (status != NFS_OK) {
1804 /* Free the stateid unless the server explicitly
1805 * informs us the stateid is unrecognized. */
1806 if (status != -NFS4ERR_BAD_STATEID)
1807 nfs41_free_stateid(server, stateid);
1809 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1810 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1811 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1816 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1820 nfs41_clear_delegation_stateid(state);
1821 status = nfs41_check_open_stateid(state);
1822 if (status != NFS_OK)
1823 status = nfs4_open_expired(sp, state);
1829 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1830 * fields corresponding to attributes that were used to store the verifier.
1831 * Make sure we clobber those fields in the later setattr call
1833 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1835 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1836 !(sattr->ia_valid & ATTR_ATIME_SET))
1837 sattr->ia_valid |= ATTR_ATIME;
1839 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1840 !(sattr->ia_valid & ATTR_MTIME_SET))
1841 sattr->ia_valid |= ATTR_MTIME;
1845 * Returns a referenced nfs4_state
1847 static int _nfs4_do_open(struct inode *dir,
1848 struct dentry *dentry,
1851 struct iattr *sattr,
1852 struct rpc_cred *cred,
1853 struct nfs4_state **res,
1854 struct nfs4_threshold **ctx_th)
1856 struct nfs4_state_owner *sp;
1857 struct nfs4_state *state = NULL;
1858 struct nfs_server *server = NFS_SERVER(dir);
1859 struct nfs4_opendata *opendata;
1862 /* Protect against reboot recovery conflicts */
1864 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1866 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1869 status = nfs4_recover_expired_lease(server);
1871 goto err_put_state_owner;
1872 if (dentry->d_inode != NULL)
1873 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1875 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1876 if (opendata == NULL)
1877 goto err_put_state_owner;
1879 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1880 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1881 if (!opendata->f_attr.mdsthreshold)
1882 goto err_opendata_put;
1883 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
1885 if (dentry->d_inode != NULL)
1886 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1888 status = _nfs4_proc_open(opendata);
1890 goto err_opendata_put;
1892 state = nfs4_opendata_to_nfs4_state(opendata);
1893 status = PTR_ERR(state);
1895 goto err_opendata_put;
1896 if (server->caps & NFS_CAP_POSIX_LOCK)
1897 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1899 if (opendata->o_arg.open_flags & O_EXCL) {
1900 nfs4_exclusive_attrset(opendata, sattr);
1902 nfs_fattr_init(opendata->o_res.f_attr);
1903 status = nfs4_do_setattr(state->inode, cred,
1904 opendata->o_res.f_attr, sattr,
1907 nfs_setattr_update_inode(state->inode, sattr);
1908 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1911 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1912 *ctx_th = opendata->f_attr.mdsthreshold;
1914 kfree(opendata->f_attr.mdsthreshold);
1915 opendata->f_attr.mdsthreshold = NULL;
1917 nfs4_opendata_put(opendata);
1918 nfs4_put_state_owner(sp);
1922 kfree(opendata->f_attr.mdsthreshold);
1923 nfs4_opendata_put(opendata);
1924 err_put_state_owner:
1925 nfs4_put_state_owner(sp);
1932 static struct nfs4_state *nfs4_do_open(struct inode *dir,
1933 struct dentry *dentry,
1936 struct iattr *sattr,
1937 struct rpc_cred *cred,
1938 struct nfs4_threshold **ctx_th)
1940 struct nfs4_exception exception = { };
1941 struct nfs4_state *res;
1944 fmode &= FMODE_READ|FMODE_WRITE;
1946 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1950 /* NOTE: BAD_SEQID means the server and client disagree about the
1951 * book-keeping w.r.t. state-changing operations
1952 * (OPEN/CLOSE/LOCK/LOCKU...)
1953 * It is actually a sign of a bug on the client or on the server.
1955 * If we receive a BAD_SEQID error in the particular case of
1956 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1957 * have unhashed the old state_owner for us, and that we can
1958 * therefore safely retry using a new one. We should still warn
1959 * the user though...
1961 if (status == -NFS4ERR_BAD_SEQID) {
1962 pr_warn_ratelimited("NFS: v4 server %s "
1963 " returned a bad sequence-id error!\n",
1964 NFS_SERVER(dir)->nfs_client->cl_hostname);
1965 exception.retry = 1;
1969 * BAD_STATEID on OPEN means that the server cancelled our
1970 * state before it received the OPEN_CONFIRM.
1971 * Recover by retrying the request as per the discussion
1972 * on Page 181 of RFC3530.
1974 if (status == -NFS4ERR_BAD_STATEID) {
1975 exception.retry = 1;
1978 if (status == -EAGAIN) {
1979 /* We must have found a delegation */
1980 exception.retry = 1;
1983 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1984 status, &exception));
1985 } while (exception.retry);
1989 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1990 struct nfs_fattr *fattr, struct iattr *sattr,
1991 struct nfs4_state *state)
1993 struct nfs_server *server = NFS_SERVER(inode);
1994 struct nfs_setattrargs arg = {
1995 .fh = NFS_FH(inode),
1998 .bitmask = server->attr_bitmask,
2000 struct nfs_setattrres res = {
2004 struct rpc_message msg = {
2005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2010 unsigned long timestamp = jiffies;
2013 nfs_fattr_init(fattr);
2015 if (state != NULL) {
2016 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2017 current->files, current->tgid);
2018 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2020 /* Use that stateid */
2022 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
2024 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2025 if (status == 0 && state != NULL)
2026 renew_lease(server, timestamp);
2030 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2031 struct nfs_fattr *fattr, struct iattr *sattr,
2032 struct nfs4_state *state)
2034 struct nfs_server *server = NFS_SERVER(inode);
2035 struct nfs4_exception exception = {
2041 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2043 case -NFS4ERR_OPENMODE:
2044 if (state && !(state->state & FMODE_WRITE)) {
2046 if (sattr->ia_valid & ATTR_OPEN)
2051 err = nfs4_handle_exception(server, err, &exception);
2052 } while (exception.retry);
2057 struct nfs4_closedata {
2058 struct inode *inode;
2059 struct nfs4_state *state;
2060 struct nfs_closeargs arg;
2061 struct nfs_closeres res;
2062 struct nfs_fattr fattr;
2063 unsigned long timestamp;
2068 static void nfs4_free_closedata(void *data)
2070 struct nfs4_closedata *calldata = data;
2071 struct nfs4_state_owner *sp = calldata->state->owner;
2072 struct super_block *sb = calldata->state->inode->i_sb;
2075 pnfs_roc_release(calldata->state->inode);
2076 nfs4_put_open_state(calldata->state);
2077 nfs_free_seqid(calldata->arg.seqid);
2078 nfs4_put_state_owner(sp);
2079 nfs_sb_deactive(sb);
2083 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2086 spin_lock(&state->owner->so_lock);
2087 if (!(fmode & FMODE_READ))
2088 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2089 if (!(fmode & FMODE_WRITE))
2090 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2091 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2092 spin_unlock(&state->owner->so_lock);
2095 static void nfs4_close_done(struct rpc_task *task, void *data)
2097 struct nfs4_closedata *calldata = data;
2098 struct nfs4_state *state = calldata->state;
2099 struct nfs_server *server = NFS_SERVER(calldata->inode);
2101 dprintk("%s: begin!\n", __func__);
2102 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2104 /* hmm. we are done with the inode, and in the process of freeing
2105 * the state_owner. we keep this around to process errors
2107 switch (task->tk_status) {
2110 pnfs_roc_set_barrier(state->inode,
2111 calldata->roc_barrier);
2112 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2113 renew_lease(server, calldata->timestamp);
2114 nfs4_close_clear_stateid_flags(state,
2115 calldata->arg.fmode);
2117 case -NFS4ERR_STALE_STATEID:
2118 case -NFS4ERR_OLD_STATEID:
2119 case -NFS4ERR_BAD_STATEID:
2120 case -NFS4ERR_EXPIRED:
2121 if (calldata->arg.fmode == 0)
2124 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2125 rpc_restart_call_prepare(task);
2127 nfs_release_seqid(calldata->arg.seqid);
2128 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2129 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2132 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2134 struct nfs4_closedata *calldata = data;
2135 struct nfs4_state *state = calldata->state;
2138 dprintk("%s: begin!\n", __func__);
2139 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2142 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2143 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2144 spin_lock(&state->owner->so_lock);
2145 /* Calculate the change in open mode */
2146 if (state->n_rdwr == 0) {
2147 if (state->n_rdonly == 0) {
2148 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2149 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2150 calldata->arg.fmode &= ~FMODE_READ;
2152 if (state->n_wronly == 0) {
2153 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2154 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2155 calldata->arg.fmode &= ~FMODE_WRITE;
2158 spin_unlock(&state->owner->so_lock);
2161 /* Note: exit _without_ calling nfs4_close_done */
2162 task->tk_action = NULL;
2166 if (calldata->arg.fmode == 0) {
2167 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2168 if (calldata->roc &&
2169 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2170 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2176 nfs_fattr_init(calldata->res.fattr);
2177 calldata->timestamp = jiffies;
2178 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2179 &calldata->arg.seq_args,
2180 &calldata->res.seq_res,
2183 rpc_call_start(task);
2185 dprintk("%s: done!\n", __func__);
2188 static const struct rpc_call_ops nfs4_close_ops = {
2189 .rpc_call_prepare = nfs4_close_prepare,
2190 .rpc_call_done = nfs4_close_done,
2191 .rpc_release = nfs4_free_closedata,
2195 * It is possible for data to be read/written from a mem-mapped file
2196 * after the sys_close call (which hits the vfs layer as a flush).
2197 * This means that we can't safely call nfsv4 close on a file until
2198 * the inode is cleared. This in turn means that we are not good
2199 * NFSv4 citizens - we do not indicate to the server to update the file's
2200 * share state even when we are done with one of the three share
2201 * stateid's in the inode.
2203 * NOTE: Caller must be holding the sp->so_owner semaphore!
2205 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2207 struct nfs_server *server = NFS_SERVER(state->inode);
2208 struct nfs4_closedata *calldata;
2209 struct nfs4_state_owner *sp = state->owner;
2210 struct rpc_task *task;
2211 struct rpc_message msg = {
2212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2213 .rpc_cred = state->owner->so_cred,
2215 struct rpc_task_setup task_setup_data = {
2216 .rpc_client = server->client,
2217 .rpc_message = &msg,
2218 .callback_ops = &nfs4_close_ops,
2219 .workqueue = nfsiod_workqueue,
2220 .flags = RPC_TASK_ASYNC,
2222 int status = -ENOMEM;
2224 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2225 if (calldata == NULL)
2227 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2228 calldata->inode = state->inode;
2229 calldata->state = state;
2230 calldata->arg.fh = NFS_FH(state->inode);
2231 calldata->arg.stateid = &state->open_stateid;
2232 /* Serialization for the sequence id */
2233 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2234 if (calldata->arg.seqid == NULL)
2235 goto out_free_calldata;
2236 calldata->arg.fmode = 0;
2237 calldata->arg.bitmask = server->cache_consistency_bitmask;
2238 calldata->res.fattr = &calldata->fattr;
2239 calldata->res.seqid = calldata->arg.seqid;
2240 calldata->res.server = server;
2241 calldata->roc = roc;
2242 nfs_sb_active(calldata->inode->i_sb);
2244 msg.rpc_argp = &calldata->arg;
2245 msg.rpc_resp = &calldata->res;
2246 task_setup_data.callback_data = calldata;
2247 task = rpc_run_task(&task_setup_data);
2249 return PTR_ERR(task);
2252 status = rpc_wait_for_completion_task(task);
2259 pnfs_roc_release(state->inode);
2260 nfs4_put_open_state(state);
2261 nfs4_put_state_owner(sp);
2265 static struct inode *
2266 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2268 struct nfs4_state *state;
2270 /* Protect against concurrent sillydeletes */
2271 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2272 ctx->cred, &ctx->mdsthreshold);
2274 return ERR_CAST(state);
2276 return igrab(state->inode);
2279 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2281 if (ctx->state == NULL)
2284 nfs4_close_sync(ctx->state, ctx->mode);
2286 nfs4_close_state(ctx->state, ctx->mode);
2289 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2291 struct nfs4_server_caps_arg args = {
2294 struct nfs4_server_caps_res res = {};
2295 struct rpc_message msg = {
2296 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2302 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2304 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2305 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2306 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2307 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2308 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2309 NFS_CAP_CTIME|NFS_CAP_MTIME);
2310 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2311 server->caps |= NFS_CAP_ACLS;
2312 if (res.has_links != 0)
2313 server->caps |= NFS_CAP_HARDLINKS;
2314 if (res.has_symlinks != 0)
2315 server->caps |= NFS_CAP_SYMLINKS;
2316 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2317 server->caps |= NFS_CAP_FILEID;
2318 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2319 server->caps |= NFS_CAP_MODE;
2320 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2321 server->caps |= NFS_CAP_NLINK;
2322 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2323 server->caps |= NFS_CAP_OWNER;
2324 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2325 server->caps |= NFS_CAP_OWNER_GROUP;
2326 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2327 server->caps |= NFS_CAP_ATIME;
2328 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2329 server->caps |= NFS_CAP_CTIME;
2330 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2331 server->caps |= NFS_CAP_MTIME;
2333 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2334 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2335 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2336 server->acl_bitmask = res.acl_bitmask;
2337 server->fh_expire_type = res.fh_expire_type;
2343 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2345 struct nfs4_exception exception = { };
2348 err = nfs4_handle_exception(server,
2349 _nfs4_server_capabilities(server, fhandle),
2351 } while (exception.retry);
2355 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2356 struct nfs_fsinfo *info)
2358 struct nfs4_lookup_root_arg args = {
2359 .bitmask = nfs4_fattr_bitmap,
2361 struct nfs4_lookup_res res = {
2363 .fattr = info->fattr,
2366 struct rpc_message msg = {
2367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2372 nfs_fattr_init(info->fattr);
2373 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2376 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2377 struct nfs_fsinfo *info)
2379 struct nfs4_exception exception = { };
2382 err = _nfs4_lookup_root(server, fhandle, info);
2385 case -NFS4ERR_WRONGSEC:
2388 err = nfs4_handle_exception(server, err, &exception);
2390 } while (exception.retry);
2395 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2396 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2398 struct rpc_auth *auth;
2401 auth = rpcauth_create(flavor, server->client);
2406 ret = nfs4_lookup_root(server, fhandle, info);
2411 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2412 struct nfs_fsinfo *info)
2414 int i, len, status = 0;
2415 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2417 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
2420 for (i = 0; i < len; i++) {
2421 /* AUTH_UNIX is the default flavor if none was specified,
2422 * thus has already been tried. */
2423 if (flav_array[i] == RPC_AUTH_UNIX)
2426 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2427 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2432 * -EACCESS could mean that the user doesn't have correct permissions
2433 * to access the mount. It could also mean that we tried to mount
2434 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2435 * existing mount programs don't handle -EACCES very well so it should
2436 * be mapped to -EPERM instead.
2438 if (status == -EACCES)
2444 * get the file handle for the "/" directory on the server
2446 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2447 struct nfs_fsinfo *info)
2449 int minor_version = server->nfs_client->cl_minorversion;
2450 int status = nfs4_lookup_root(server, fhandle, info);
2451 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2453 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2454 * by nfs4_map_errors() as this function exits.
2456 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2458 status = nfs4_server_capabilities(server, fhandle);
2460 status = nfs4_do_fsinfo(server, fhandle, info);
2461 return nfs4_map_errors(status);
2464 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2465 struct nfs_fsinfo *info)
2468 struct nfs_fattr *fattr = info->fattr;
2470 error = nfs4_server_capabilities(server, mntfh);
2472 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2476 error = nfs4_proc_getattr(server, mntfh, fattr);
2478 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2482 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2483 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2484 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2490 * Get locations and (maybe) other attributes of a referral.
2491 * Note that we'll actually follow the referral later when
2492 * we detect fsid mismatch in inode revalidation
2494 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2495 const struct qstr *name, struct nfs_fattr *fattr,
2496 struct nfs_fh *fhandle)
2498 int status = -ENOMEM;
2499 struct page *page = NULL;
2500 struct nfs4_fs_locations *locations = NULL;
2502 page = alloc_page(GFP_KERNEL);
2505 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2506 if (locations == NULL)
2509 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2512 /* Make sure server returned a different fsid for the referral */
2513 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2514 dprintk("%s: server did not return a different fsid for"
2515 " a referral at %s\n", __func__, name->name);
2519 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2520 nfs_fixup_referral_attributes(&locations->fattr);
2522 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2523 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2524 memset(fhandle, 0, sizeof(struct nfs_fh));
2532 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2534 struct nfs4_getattr_arg args = {
2536 .bitmask = server->attr_bitmask,
2538 struct nfs4_getattr_res res = {
2542 struct rpc_message msg = {
2543 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2548 nfs_fattr_init(fattr);
2549 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2552 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2554 struct nfs4_exception exception = { };
2557 err = nfs4_handle_exception(server,
2558 _nfs4_proc_getattr(server, fhandle, fattr),
2560 } while (exception.retry);
2565 * The file is not closed if it is opened due to the a request to change
2566 * the size of the file. The open call will not be needed once the
2567 * VFS layer lookup-intents are implemented.
2569 * Close is called when the inode is destroyed.
2570 * If we haven't opened the file for O_WRONLY, we
2571 * need to in the size_change case to obtain a stateid.
2574 * Because OPEN is always done by name in nfsv4, it is
2575 * possible that we opened a different file by the same
2576 * name. We can recognize this race condition, but we
2577 * can't do anything about it besides returning an error.
2579 * This will be fixed with VFS changes (lookup-intent).
2582 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2583 struct iattr *sattr)
2585 struct inode *inode = dentry->d_inode;
2586 struct rpc_cred *cred = NULL;
2587 struct nfs4_state *state = NULL;
2590 if (pnfs_ld_layoutret_on_setattr(inode))
2591 pnfs_return_layout(inode);
2593 nfs_fattr_init(fattr);
2595 /* Deal with open(O_TRUNC) */
2596 if (sattr->ia_valid & ATTR_OPEN)
2597 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2599 /* Optimization: if the end result is no change, don't RPC */
2600 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2603 /* Search for an existing open(O_WRITE) file */
2604 if (sattr->ia_valid & ATTR_FILE) {
2605 struct nfs_open_context *ctx;
2607 ctx = nfs_file_open_context(sattr->ia_file);
2614 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2616 nfs_setattr_update_inode(inode, sattr);
2620 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2621 const struct qstr *name, struct nfs_fh *fhandle,
2622 struct nfs_fattr *fattr)
2624 struct nfs_server *server = NFS_SERVER(dir);
2626 struct nfs4_lookup_arg args = {
2627 .bitmask = server->attr_bitmask,
2628 .dir_fh = NFS_FH(dir),
2631 struct nfs4_lookup_res res = {
2636 struct rpc_message msg = {
2637 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2642 nfs_fattr_init(fattr);
2644 dprintk("NFS call lookup %s\n", name->name);
2645 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2646 dprintk("NFS reply lookup: %d\n", status);
2650 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2652 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2653 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2654 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2658 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2659 struct qstr *name, struct nfs_fh *fhandle,
2660 struct nfs_fattr *fattr)
2662 struct nfs4_exception exception = { };
2663 struct rpc_clnt *client = *clnt;
2666 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2668 case -NFS4ERR_BADNAME:
2671 case -NFS4ERR_MOVED:
2672 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2674 case -NFS4ERR_WRONGSEC:
2676 if (client != *clnt)
2679 client = nfs4_create_sec_client(client, dir, name);
2681 return PTR_ERR(client);
2683 exception.retry = 1;
2686 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2688 } while (exception.retry);
2693 else if (client != *clnt)
2694 rpc_shutdown_client(client);
2699 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2700 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2703 struct rpc_clnt *client = NFS_CLIENT(dir);
2705 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2706 if (client != NFS_CLIENT(dir)) {
2707 rpc_shutdown_client(client);
2708 nfs_fixup_secinfo_attributes(fattr);
2714 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2715 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2718 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2720 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2722 rpc_shutdown_client(client);
2723 return ERR_PTR(status);
2728 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2730 struct nfs_server *server = NFS_SERVER(inode);
2731 struct nfs4_accessargs args = {
2732 .fh = NFS_FH(inode),
2733 .bitmask = server->cache_consistency_bitmask,
2735 struct nfs4_accessres res = {
2738 struct rpc_message msg = {
2739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2742 .rpc_cred = entry->cred,
2744 int mode = entry->mask;
2748 * Determine which access bits we want to ask for...
2750 if (mode & MAY_READ)
2751 args.access |= NFS4_ACCESS_READ;
2752 if (S_ISDIR(inode->i_mode)) {
2753 if (mode & MAY_WRITE)
2754 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2755 if (mode & MAY_EXEC)
2756 args.access |= NFS4_ACCESS_LOOKUP;
2758 if (mode & MAY_WRITE)
2759 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2760 if (mode & MAY_EXEC)
2761 args.access |= NFS4_ACCESS_EXECUTE;
2764 res.fattr = nfs_alloc_fattr();
2765 if (res.fattr == NULL)
2768 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2771 if (res.access & NFS4_ACCESS_READ)
2772 entry->mask |= MAY_READ;
2773 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2774 entry->mask |= MAY_WRITE;
2775 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2776 entry->mask |= MAY_EXEC;
2777 nfs_refresh_inode(inode, res.fattr);
2779 nfs_free_fattr(res.fattr);
2783 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2785 struct nfs4_exception exception = { };
2788 err = nfs4_handle_exception(NFS_SERVER(inode),
2789 _nfs4_proc_access(inode, entry),
2791 } while (exception.retry);
2796 * TODO: For the time being, we don't try to get any attributes
2797 * along with any of the zero-copy operations READ, READDIR,
2800 * In the case of the first three, we want to put the GETATTR
2801 * after the read-type operation -- this is because it is hard
2802 * to predict the length of a GETATTR response in v4, and thus
2803 * align the READ data correctly. This means that the GETATTR
2804 * may end up partially falling into the page cache, and we should
2805 * shift it into the 'tail' of the xdr_buf before processing.
2806 * To do this efficiently, we need to know the total length
2807 * of data received, which doesn't seem to be available outside
2810 * In the case of WRITE, we also want to put the GETATTR after
2811 * the operation -- in this case because we want to make sure
2812 * we get the post-operation mtime and size.
2814 * Both of these changes to the XDR layer would in fact be quite
2815 * minor, but I decided to leave them for a subsequent patch.
2817 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2818 unsigned int pgbase, unsigned int pglen)
2820 struct nfs4_readlink args = {
2821 .fh = NFS_FH(inode),
2826 struct nfs4_readlink_res res;
2827 struct rpc_message msg = {
2828 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2833 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2836 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2837 unsigned int pgbase, unsigned int pglen)
2839 struct nfs4_exception exception = { };
2842 err = nfs4_handle_exception(NFS_SERVER(inode),
2843 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2845 } while (exception.retry);
2850 * This is just for mknod. open(O_CREAT) will always do ->open_context().
2853 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2856 struct nfs_open_context *ctx;
2857 struct nfs4_state *state;
2860 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2862 return PTR_ERR(ctx);
2864 sattr->ia_mode &= ~current_umask();
2865 state = nfs4_do_open(dir, dentry, ctx->mode,
2866 flags, sattr, ctx->cred,
2867 &ctx->mdsthreshold);
2869 if (IS_ERR(state)) {
2870 status = PTR_ERR(state);
2873 d_add(dentry, igrab(state->inode));
2874 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2877 put_nfs_open_context(ctx);
2881 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2883 struct nfs_server *server = NFS_SERVER(dir);
2884 struct nfs_removeargs args = {
2888 struct nfs_removeres res = {
2891 struct rpc_message msg = {
2892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2898 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2900 update_changeattr(dir, &res.cinfo);
2904 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2906 struct nfs4_exception exception = { };
2909 err = nfs4_handle_exception(NFS_SERVER(dir),
2910 _nfs4_proc_remove(dir, name),
2912 } while (exception.retry);
2916 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2918 struct nfs_server *server = NFS_SERVER(dir);
2919 struct nfs_removeargs *args = msg->rpc_argp;
2920 struct nfs_removeres *res = msg->rpc_resp;
2922 res->server = server;
2923 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2924 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2927 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2929 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2930 &data->args.seq_args,
2934 rpc_call_start(task);
2937 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2939 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2941 if (!nfs4_sequence_done(task, &res->seq_res))
2943 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2945 update_changeattr(dir, &res->cinfo);
2949 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2951 struct nfs_server *server = NFS_SERVER(dir);
2952 struct nfs_renameargs *arg = msg->rpc_argp;
2953 struct nfs_renameres *res = msg->rpc_resp;
2955 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2956 res->server = server;
2957 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2960 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2962 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2963 &data->args.seq_args,
2967 rpc_call_start(task);
2970 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2971 struct inode *new_dir)
2973 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2975 if (!nfs4_sequence_done(task, &res->seq_res))
2977 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2980 update_changeattr(old_dir, &res->old_cinfo);
2981 update_changeattr(new_dir, &res->new_cinfo);
2985 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2986 struct inode *new_dir, struct qstr *new_name)
2988 struct nfs_server *server = NFS_SERVER(old_dir);
2989 struct nfs_renameargs arg = {
2990 .old_dir = NFS_FH(old_dir),
2991 .new_dir = NFS_FH(new_dir),
2992 .old_name = old_name,
2993 .new_name = new_name,
2995 struct nfs_renameres res = {
2998 struct rpc_message msg = {
2999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3003 int status = -ENOMEM;
3005 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3007 update_changeattr(old_dir, &res.old_cinfo);
3008 update_changeattr(new_dir, &res.new_cinfo);
3013 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3014 struct inode *new_dir, struct qstr *new_name)
3016 struct nfs4_exception exception = { };
3019 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3020 _nfs4_proc_rename(old_dir, old_name,
3023 } while (exception.retry);
3027 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3029 struct nfs_server *server = NFS_SERVER(inode);
3030 struct nfs4_link_arg arg = {
3031 .fh = NFS_FH(inode),
3032 .dir_fh = NFS_FH(dir),
3034 .bitmask = server->attr_bitmask,
3036 struct nfs4_link_res res = {
3039 struct rpc_message msg = {
3040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3044 int status = -ENOMEM;
3046 res.fattr = nfs_alloc_fattr();
3047 if (res.fattr == NULL)
3050 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3052 update_changeattr(dir, &res.cinfo);
3053 nfs_post_op_update_inode(inode, res.fattr);
3056 nfs_free_fattr(res.fattr);
3060 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3062 struct nfs4_exception exception = { };
3065 err = nfs4_handle_exception(NFS_SERVER(inode),
3066 _nfs4_proc_link(inode, dir, name),
3068 } while (exception.retry);
3072 struct nfs4_createdata {
3073 struct rpc_message msg;
3074 struct nfs4_create_arg arg;
3075 struct nfs4_create_res res;
3077 struct nfs_fattr fattr;
3080 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3081 struct qstr *name, struct iattr *sattr, u32 ftype)
3083 struct nfs4_createdata *data;
3085 data = kzalloc(sizeof(*data), GFP_KERNEL);
3087 struct nfs_server *server = NFS_SERVER(dir);
3089 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3090 data->msg.rpc_argp = &data->arg;
3091 data->msg.rpc_resp = &data->res;
3092 data->arg.dir_fh = NFS_FH(dir);
3093 data->arg.server = server;
3094 data->arg.name = name;
3095 data->arg.attrs = sattr;
3096 data->arg.ftype = ftype;
3097 data->arg.bitmask = server->attr_bitmask;
3098 data->res.server = server;
3099 data->res.fh = &data->fh;
3100 data->res.fattr = &data->fattr;
3101 nfs_fattr_init(data->res.fattr);
3106 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3108 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3109 &data->arg.seq_args, &data->res.seq_res, 1);
3111 update_changeattr(dir, &data->res.dir_cinfo);
3112 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3117 static void nfs4_free_createdata(struct nfs4_createdata *data)
3122 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3123 struct page *page, unsigned int len, struct iattr *sattr)
3125 struct nfs4_createdata *data;
3126 int status = -ENAMETOOLONG;
3128 if (len > NFS4_MAXPATHLEN)
3132 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3136 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3137 data->arg.u.symlink.pages = &page;
3138 data->arg.u.symlink.len = len;
3140 status = nfs4_do_create(dir, dentry, data);
3142 nfs4_free_createdata(data);
3147 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3148 struct page *page, unsigned int len, struct iattr *sattr)
3150 struct nfs4_exception exception = { };
3153 err = nfs4_handle_exception(NFS_SERVER(dir),
3154 _nfs4_proc_symlink(dir, dentry, page,
3157 } while (exception.retry);
3161 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3162 struct iattr *sattr)
3164 struct nfs4_createdata *data;
3165 int status = -ENOMEM;
3167 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3171 status = nfs4_do_create(dir, dentry, data);
3173 nfs4_free_createdata(data);
3178 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3179 struct iattr *sattr)
3181 struct nfs4_exception exception = { };
3184 sattr->ia_mode &= ~current_umask();
3186 err = nfs4_handle_exception(NFS_SERVER(dir),
3187 _nfs4_proc_mkdir(dir, dentry, sattr),
3189 } while (exception.retry);
3193 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3194 u64 cookie, struct page **pages, unsigned int count, int plus)
3196 struct inode *dir = dentry->d_inode;
3197 struct nfs4_readdir_arg args = {
3202 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3205 struct nfs4_readdir_res res;
3206 struct rpc_message msg = {
3207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3214 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3215 dentry->d_parent->d_name.name,
3216 dentry->d_name.name,
3217 (unsigned long long)cookie);
3218 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
3219 res.pgbase = args.pgbase;
3220 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3222 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
3223 status += args.pgbase;
3226 nfs_invalidate_atime(dir);
3228 dprintk("%s: returns %d\n", __func__, status);
3232 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3233 u64 cookie, struct page **pages, unsigned int count, int plus)
3235 struct nfs4_exception exception = { };
3238 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3239 _nfs4_proc_readdir(dentry, cred, cookie,
3240 pages, count, plus),
3242 } while (exception.retry);
3246 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3247 struct iattr *sattr, dev_t rdev)
3249 struct nfs4_createdata *data;
3250 int mode = sattr->ia_mode;
3251 int status = -ENOMEM;
3253 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3254 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3256 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3261 data->arg.ftype = NF4FIFO;
3262 else if (S_ISBLK(mode)) {
3263 data->arg.ftype = NF4BLK;
3264 data->arg.u.device.specdata1 = MAJOR(rdev);
3265 data->arg.u.device.specdata2 = MINOR(rdev);
3267 else if (S_ISCHR(mode)) {
3268 data->arg.ftype = NF4CHR;
3269 data->arg.u.device.specdata1 = MAJOR(rdev);
3270 data->arg.u.device.specdata2 = MINOR(rdev);
3273 status = nfs4_do_create(dir, dentry, data);
3275 nfs4_free_createdata(data);
3280 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3281 struct iattr *sattr, dev_t rdev)
3283 struct nfs4_exception exception = { };
3286 sattr->ia_mode &= ~current_umask();
3288 err = nfs4_handle_exception(NFS_SERVER(dir),
3289 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3291 } while (exception.retry);
3295 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3296 struct nfs_fsstat *fsstat)
3298 struct nfs4_statfs_arg args = {
3300 .bitmask = server->attr_bitmask,
3302 struct nfs4_statfs_res res = {
3305 struct rpc_message msg = {
3306 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3311 nfs_fattr_init(fsstat->fattr);
3312 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3315 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3317 struct nfs4_exception exception = { };
3320 err = nfs4_handle_exception(server,
3321 _nfs4_proc_statfs(server, fhandle, fsstat),
3323 } while (exception.retry);
3327 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3328 struct nfs_fsinfo *fsinfo)
3330 struct nfs4_fsinfo_arg args = {
3332 .bitmask = server->attr_bitmask,
3334 struct nfs4_fsinfo_res res = {
3337 struct rpc_message msg = {
3338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3343 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3346 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3348 struct nfs4_exception exception = { };
3352 err = nfs4_handle_exception(server,
3353 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3355 } while (exception.retry);
3359 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3363 nfs_fattr_init(fsinfo->fattr);
3364 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
3366 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
3371 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3372 struct nfs_pathconf *pathconf)
3374 struct nfs4_pathconf_arg args = {
3376 .bitmask = server->attr_bitmask,
3378 struct nfs4_pathconf_res res = {
3379 .pathconf = pathconf,
3381 struct rpc_message msg = {
3382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3387 /* None of the pathconf attributes are mandatory to implement */
3388 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3389 memset(pathconf, 0, sizeof(*pathconf));
3393 nfs_fattr_init(pathconf->fattr);
3394 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3397 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3398 struct nfs_pathconf *pathconf)
3400 struct nfs4_exception exception = { };
3404 err = nfs4_handle_exception(server,
3405 _nfs4_proc_pathconf(server, fhandle, pathconf),
3407 } while (exception.retry);
3411 void __nfs4_read_done_cb(struct nfs_read_data *data)
3413 nfs_invalidate_atime(data->header->inode);
3416 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3418 struct nfs_server *server = NFS_SERVER(data->header->inode);
3420 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3421 rpc_restart_call_prepare(task);
3425 __nfs4_read_done_cb(data);
3426 if (task->tk_status > 0)
3427 renew_lease(server, data->timestamp);
3431 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3434 dprintk("--> %s\n", __func__);
3436 if (!nfs4_sequence_done(task, &data->res.seq_res))
3439 return data->read_done_cb ? data->read_done_cb(task, data) :
3440 nfs4_read_done_cb(task, data);
3443 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3445 data->timestamp = jiffies;
3446 data->read_done_cb = nfs4_read_done_cb;
3447 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3448 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3451 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3453 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3454 &data->args.seq_args,
3458 rpc_call_start(task);
3461 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3463 struct inode *inode = data->header->inode;
3465 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3466 rpc_restart_call_prepare(task);
3469 if (task->tk_status >= 0) {
3470 renew_lease(NFS_SERVER(inode), data->timestamp);
3471 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3476 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3478 if (!nfs4_sequence_done(task, &data->res.seq_res))
3480 return data->write_done_cb ? data->write_done_cb(task, data) :
3481 nfs4_write_done_cb(task, data);
3485 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3487 const struct nfs_pgio_header *hdr = data->header;
3489 /* Don't request attributes for pNFS or O_DIRECT writes */
3490 if (data->ds_clp != NULL || hdr->dreq != NULL)
3492 /* Otherwise, request attributes if and only if we don't hold
3495 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
3498 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3500 struct nfs_server *server = NFS_SERVER(data->header->inode);
3502 if (!nfs4_write_need_cache_consistency_data(data)) {
3503 data->args.bitmask = NULL;
3504 data->res.fattr = NULL;
3506 data->args.bitmask = server->cache_consistency_bitmask;
3508 if (!data->write_done_cb)
3509 data->write_done_cb = nfs4_write_done_cb;
3510 data->res.server = server;
3511 data->timestamp = jiffies;
3513 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3514 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3517 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3519 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3520 &data->args.seq_args,
3524 rpc_call_start(task);
3527 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3529 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3530 &data->args.seq_args,
3534 rpc_call_start(task);
3537 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3539 struct inode *inode = data->inode;
3541 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3542 rpc_restart_call_prepare(task);
3548 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3550 if (!nfs4_sequence_done(task, &data->res.seq_res))
3552 return data->commit_done_cb(task, data);
3555 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3557 struct nfs_server *server = NFS_SERVER(data->inode);
3559 if (data->commit_done_cb == NULL)
3560 data->commit_done_cb = nfs4_commit_done_cb;
3561 data->res.server = server;
3562 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3563 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3566 struct nfs4_renewdata {
3567 struct nfs_client *client;
3568 unsigned long timestamp;
3572 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3573 * standalone procedure for queueing an asynchronous RENEW.
3575 static void nfs4_renew_release(void *calldata)
3577 struct nfs4_renewdata *data = calldata;
3578 struct nfs_client *clp = data->client;
3580 if (atomic_read(&clp->cl_count) > 1)
3581 nfs4_schedule_state_renewal(clp);
3582 nfs_put_client(clp);
3586 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3588 struct nfs4_renewdata *data = calldata;
3589 struct nfs_client *clp = data->client;
3590 unsigned long timestamp = data->timestamp;
3592 if (task->tk_status < 0) {
3593 /* Unless we're shutting down, schedule state recovery! */
3594 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3596 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3597 nfs4_schedule_lease_recovery(clp);
3600 nfs4_schedule_path_down_recovery(clp);
3602 do_renew_lease(clp, timestamp);
3605 static const struct rpc_call_ops nfs4_renew_ops = {
3606 .rpc_call_done = nfs4_renew_done,
3607 .rpc_release = nfs4_renew_release,
3610 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3612 struct rpc_message msg = {
3613 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3617 struct nfs4_renewdata *data;
3619 if (renew_flags == 0)
3621 if (!atomic_inc_not_zero(&clp->cl_count))
3623 data = kmalloc(sizeof(*data), GFP_NOFS);
3627 data->timestamp = jiffies;
3628 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3629 &nfs4_renew_ops, data);
3632 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3634 struct rpc_message msg = {
3635 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3639 unsigned long now = jiffies;
3642 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3645 do_renew_lease(clp, now);
3649 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3651 return (server->caps & NFS_CAP_ACLS)
3652 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3653 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3656 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3657 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
3660 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
3662 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3663 struct page **pages, unsigned int *pgbase)
3665 struct page *newpage, **spages;
3671 len = min_t(size_t, PAGE_SIZE, buflen);
3672 newpage = alloc_page(GFP_KERNEL);
3674 if (newpage == NULL)
3676 memcpy(page_address(newpage), buf, len);
3681 } while (buflen != 0);
3687 __free_page(spages[rc-1]);
3691 struct nfs4_cached_acl {
3697 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3699 struct nfs_inode *nfsi = NFS_I(inode);
3701 spin_lock(&inode->i_lock);
3702 kfree(nfsi->nfs4_acl);
3703 nfsi->nfs4_acl = acl;
3704 spin_unlock(&inode->i_lock);
3707 static void nfs4_zap_acl_attr(struct inode *inode)
3709 nfs4_set_cached_acl(inode, NULL);
3712 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3714 struct nfs_inode *nfsi = NFS_I(inode);
3715 struct nfs4_cached_acl *acl;
3718 spin_lock(&inode->i_lock);
3719 acl = nfsi->nfs4_acl;
3722 if (buf == NULL) /* user is just asking for length */
3724 if (acl->cached == 0)
3726 ret = -ERANGE; /* see getxattr(2) man page */
3727 if (acl->len > buflen)
3729 memcpy(buf, acl->data, acl->len);
3733 spin_unlock(&inode->i_lock);
3737 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3739 struct nfs4_cached_acl *acl;
3740 size_t buflen = sizeof(*acl) + acl_len;
3742 if (pages && buflen <= PAGE_SIZE) {
3743 acl = kmalloc(buflen, GFP_KERNEL);
3747 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3749 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3756 nfs4_set_cached_acl(inode, acl);
3760 * The getxattr API returns the required buffer length when called with a
3761 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3762 * the required buf. On a NULL buf, we send a page of data to the server
3763 * guessing that the ACL request can be serviced by a page. If so, we cache
3764 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3765 * the cache. If not so, we throw away the page, and cache the required
3766 * length. The next getxattr call will then produce another round trip to
3767 * the server, this time with the input buf of the required size.
3769 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3771 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3772 struct nfs_getaclargs args = {
3773 .fh = NFS_FH(inode),
3777 struct nfs_getaclres res = {
3780 struct rpc_message msg = {
3781 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3785 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3786 int ret = -ENOMEM, i;
3789 /* As long as we're doing a round trip to the server anyway,
3790 * let's be prepared for a page of acl data. */
3793 if (npages > ARRAY_SIZE(pages))
3796 for (i = 0; i < npages; i++) {
3797 pages[i] = alloc_page(GFP_KERNEL);
3802 /* for decoding across pages */
3803 res.acl_scratch = alloc_page(GFP_KERNEL);
3804 if (!res.acl_scratch)
3807 args.acl_len = npages * PAGE_SIZE;
3808 args.acl_pgbase = 0;
3810 /* Let decode_getfacl know not to fail if the ACL data is larger than
3811 * the page we send as a guess */
3813 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3815 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3816 __func__, buf, buflen, npages, args.acl_len);
3817 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3818 &msg, &args.seq_args, &res.seq_res, 0);
3822 acl_len = res.acl_len;
3823 if (acl_len > args.acl_len)
3824 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
3826 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
3830 if (acl_len > buflen)
3832 _copy_from_pages(buf, pages, res.acl_data_offset,
3837 for (i = 0; i < npages; i++)
3839 __free_page(pages[i]);
3840 if (res.acl_scratch)
3841 __free_page(res.acl_scratch);
3845 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3847 struct nfs4_exception exception = { };
3850 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3853 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3854 } while (exception.retry);
3858 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3860 struct nfs_server *server = NFS_SERVER(inode);
3863 if (!nfs4_server_supports_acls(server))
3865 ret = nfs_revalidate_inode(server, inode);
3868 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3869 nfs_zap_acl_cache(inode);
3870 ret = nfs4_read_cached_acl(inode, buf, buflen);
3872 /* -ENOENT is returned if there is no ACL or if there is an ACL
3873 * but no cached acl data, just the acl length */
3875 return nfs4_get_acl_uncached(inode, buf, buflen);
3878 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3880 struct nfs_server *server = NFS_SERVER(inode);
3881 struct page *pages[NFS4ACL_MAXPAGES];
3882 struct nfs_setaclargs arg = {
3883 .fh = NFS_FH(inode),
3887 struct nfs_setaclres res;
3888 struct rpc_message msg = {
3889 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3893 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3896 if (!nfs4_server_supports_acls(server))
3898 if (npages > ARRAY_SIZE(pages))
3900 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3903 nfs4_inode_return_delegation(inode);
3904 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3907 * Free each page after tx, so the only ref left is
3908 * held by the network stack
3911 put_page(pages[i-1]);
3914 * Acl update can result in inode attribute update.
3915 * so mark the attribute cache invalid.
3917 spin_lock(&inode->i_lock);
3918 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3919 spin_unlock(&inode->i_lock);
3920 nfs_access_zap_cache(inode);
3921 nfs_zap_acl_cache(inode);
3925 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3927 struct nfs4_exception exception = { };
3930 err = nfs4_handle_exception(NFS_SERVER(inode),
3931 __nfs4_proc_set_acl(inode, buf, buflen),
3933 } while (exception.retry);
3938 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3940 struct nfs_client *clp = server->nfs_client;
3942 if (task->tk_status >= 0)
3944 switch(task->tk_status) {
3945 case -NFS4ERR_DELEG_REVOKED:
3946 case -NFS4ERR_ADMIN_REVOKED:
3947 case -NFS4ERR_BAD_STATEID:
3950 nfs_remove_bad_delegation(state->inode);
3951 case -NFS4ERR_OPENMODE:
3954 nfs4_schedule_stateid_recovery(server, state);
3955 goto wait_on_recovery;
3956 case -NFS4ERR_EXPIRED:
3958 nfs4_schedule_stateid_recovery(server, state);
3959 case -NFS4ERR_STALE_STATEID:
3960 case -NFS4ERR_STALE_CLIENTID:
3961 nfs4_schedule_lease_recovery(clp);
3962 goto wait_on_recovery;
3963 #if defined(CONFIG_NFS_V4_1)
3964 case -NFS4ERR_BADSESSION:
3965 case -NFS4ERR_BADSLOT:
3966 case -NFS4ERR_BAD_HIGH_SLOT:
3967 case -NFS4ERR_DEADSESSION:
3968 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3969 case -NFS4ERR_SEQ_FALSE_RETRY:
3970 case -NFS4ERR_SEQ_MISORDERED:
3971 dprintk("%s ERROR %d, Reset session\n", __func__,
3973 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
3974 task->tk_status = 0;
3976 #endif /* CONFIG_NFS_V4_1 */
3977 case -NFS4ERR_DELAY:
3978 nfs_inc_server_stats(server, NFSIOS_DELAY);
3979 case -NFS4ERR_GRACE:
3981 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3982 task->tk_status = 0;
3984 case -NFS4ERR_RETRY_UNCACHED_REP:
3985 case -NFS4ERR_OLD_STATEID:
3986 task->tk_status = 0;
3989 task->tk_status = nfs4_map_errors(task->tk_status);
3992 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3993 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3994 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3995 task->tk_status = 0;
3999 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4000 nfs4_verifier *bootverf)
4004 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4005 /* An impossible timestamp guarantees this value
4006 * will never match a generated boot time. */
4008 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4010 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4011 verf[0] = (__be32)nn->boot_time.tv_sec;
4012 verf[1] = (__be32)nn->boot_time.tv_nsec;
4014 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4018 * nfs4_proc_setclientid - Negotiate client ID
4019 * @clp: state data structure
4020 * @program: RPC program for NFSv4 callback service
4021 * @port: IP port number for NFS4 callback service
4022 * @cred: RPC credential to use for this call
4023 * @res: where to place the result
4025 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4027 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4028 unsigned short port, struct rpc_cred *cred,
4029 struct nfs4_setclientid_res *res)
4031 nfs4_verifier sc_verifier;
4032 struct nfs4_setclientid setclientid = {
4033 .sc_verifier = &sc_verifier,
4035 .sc_cb_ident = clp->cl_cb_ident,
4037 struct rpc_message msg = {
4038 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4039 .rpc_argp = &setclientid,
4045 /* nfs_client_id4 */
4046 nfs4_init_boot_verifier(clp, &sc_verifier);
4048 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
4049 sizeof(setclientid.sc_name), "%s/%s %s",
4051 rpc_peeraddr2str(clp->cl_rpcclient,
4053 rpc_peeraddr2str(clp->cl_rpcclient,
4054 RPC_DISPLAY_PROTO));
4056 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
4057 sizeof(setclientid.sc_netid),
4058 rpc_peeraddr2str(clp->cl_rpcclient,
4059 RPC_DISPLAY_NETID));
4061 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
4062 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
4063 clp->cl_ipaddr, port >> 8, port & 255);
4065 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4066 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4067 setclientid.sc_name_len, setclientid.sc_name);
4068 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4069 dprintk("NFS reply setclientid: %d\n", status);
4074 * nfs4_proc_setclientid_confirm - Confirm client ID
4075 * @clp: state data structure
4076 * @res: result of a previous SETCLIENTID
4077 * @cred: RPC credential to use for this call
4079 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4081 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4082 struct nfs4_setclientid_res *arg,
4083 struct rpc_cred *cred)
4085 struct nfs_fsinfo fsinfo;
4086 struct rpc_message msg = {
4087 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4089 .rpc_resp = &fsinfo,
4095 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4096 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4099 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4101 spin_lock(&clp->cl_lock);
4102 clp->cl_lease_time = fsinfo.lease_time * HZ;
4103 clp->cl_last_renewal = now;
4104 spin_unlock(&clp->cl_lock);
4106 dprintk("NFS reply setclientid_confirm: %d\n", status);
4110 struct nfs4_delegreturndata {
4111 struct nfs4_delegreturnargs args;
4112 struct nfs4_delegreturnres res;
4114 nfs4_stateid stateid;
4115 unsigned long timestamp;
4116 struct nfs_fattr fattr;
4120 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4122 struct nfs4_delegreturndata *data = calldata;
4124 if (!nfs4_sequence_done(task, &data->res.seq_res))
4127 switch (task->tk_status) {
4128 case -NFS4ERR_STALE_STATEID:
4129 case -NFS4ERR_EXPIRED:
4131 renew_lease(data->res.server, data->timestamp);
4134 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4136 rpc_restart_call_prepare(task);
4140 data->rpc_status = task->tk_status;
4143 static void nfs4_delegreturn_release(void *calldata)
4148 #if defined(CONFIG_NFS_V4_1)
4149 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4151 struct nfs4_delegreturndata *d_data;
4153 d_data = (struct nfs4_delegreturndata *)data;
4155 if (nfs4_setup_sequence(d_data->res.server,
4156 &d_data->args.seq_args,
4157 &d_data->res.seq_res, task))
4159 rpc_call_start(task);
4161 #endif /* CONFIG_NFS_V4_1 */
4163 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4164 #if defined(CONFIG_NFS_V4_1)
4165 .rpc_call_prepare = nfs4_delegreturn_prepare,
4166 #endif /* CONFIG_NFS_V4_1 */
4167 .rpc_call_done = nfs4_delegreturn_done,
4168 .rpc_release = nfs4_delegreturn_release,
4171 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4173 struct nfs4_delegreturndata *data;
4174 struct nfs_server *server = NFS_SERVER(inode);
4175 struct rpc_task *task;
4176 struct rpc_message msg = {
4177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4180 struct rpc_task_setup task_setup_data = {
4181 .rpc_client = server->client,
4182 .rpc_message = &msg,
4183 .callback_ops = &nfs4_delegreturn_ops,
4184 .flags = RPC_TASK_ASYNC,
4188 data = kzalloc(sizeof(*data), GFP_NOFS);
4191 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4192 data->args.fhandle = &data->fh;
4193 data->args.stateid = &data->stateid;
4194 data->args.bitmask = server->cache_consistency_bitmask;
4195 nfs_copy_fh(&data->fh, NFS_FH(inode));
4196 nfs4_stateid_copy(&data->stateid, stateid);
4197 data->res.fattr = &data->fattr;
4198 data->res.server = server;
4199 nfs_fattr_init(data->res.fattr);
4200 data->timestamp = jiffies;
4201 data->rpc_status = 0;
4203 task_setup_data.callback_data = data;
4204 msg.rpc_argp = &data->args;
4205 msg.rpc_resp = &data->res;
4206 task = rpc_run_task(&task_setup_data);
4208 return PTR_ERR(task);
4211 status = nfs4_wait_for_completion_rpc_task(task);
4214 status = data->rpc_status;
4216 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4218 nfs_refresh_inode(inode, &data->fattr);
4224 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4226 struct nfs_server *server = NFS_SERVER(inode);
4227 struct nfs4_exception exception = { };
4230 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4232 case -NFS4ERR_STALE_STATEID:
4233 case -NFS4ERR_EXPIRED:
4237 err = nfs4_handle_exception(server, err, &exception);
4238 } while (exception.retry);
4242 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4243 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4246 * sleep, with exponential backoff, and retry the LOCK operation.
4248 static unsigned long
4249 nfs4_set_lock_task_retry(unsigned long timeout)
4251 freezable_schedule_timeout_killable(timeout);
4253 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4254 return NFS4_LOCK_MAXTIMEOUT;
4258 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4260 struct inode *inode = state->inode;
4261 struct nfs_server *server = NFS_SERVER(inode);
4262 struct nfs_client *clp = server->nfs_client;
4263 struct nfs_lockt_args arg = {
4264 .fh = NFS_FH(inode),
4267 struct nfs_lockt_res res = {
4270 struct rpc_message msg = {
4271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4274 .rpc_cred = state->owner->so_cred,
4276 struct nfs4_lock_state *lsp;
4279 arg.lock_owner.clientid = clp->cl_clientid;
4280 status = nfs4_set_lock_state(state, request);
4283 lsp = request->fl_u.nfs4_fl.owner;
4284 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4285 arg.lock_owner.s_dev = server->s_dev;
4286 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4289 request->fl_type = F_UNLCK;
4291 case -NFS4ERR_DENIED:
4294 request->fl_ops->fl_release_private(request);
4299 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4301 struct nfs4_exception exception = { };
4305 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4306 _nfs4_proc_getlk(state, cmd, request),
4308 } while (exception.retry);
4312 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4315 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4317 res = posix_lock_file_wait(file, fl);
4320 res = flock_lock_file_wait(file, fl);
4328 struct nfs4_unlockdata {
4329 struct nfs_locku_args arg;
4330 struct nfs_locku_res res;
4331 struct nfs4_lock_state *lsp;
4332 struct nfs_open_context *ctx;
4333 struct file_lock fl;
4334 const struct nfs_server *server;
4335 unsigned long timestamp;
4338 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4339 struct nfs_open_context *ctx,
4340 struct nfs4_lock_state *lsp,
4341 struct nfs_seqid *seqid)
4343 struct nfs4_unlockdata *p;
4344 struct inode *inode = lsp->ls_state->inode;
4346 p = kzalloc(sizeof(*p), GFP_NOFS);
4349 p->arg.fh = NFS_FH(inode);
4351 p->arg.seqid = seqid;
4352 p->res.seqid = seqid;
4353 p->arg.stateid = &lsp->ls_stateid;
4355 atomic_inc(&lsp->ls_count);
4356 /* Ensure we don't close file until we're done freeing locks! */
4357 p->ctx = get_nfs_open_context(ctx);
4358 memcpy(&p->fl, fl, sizeof(p->fl));
4359 p->server = NFS_SERVER(inode);
4363 static void nfs4_locku_release_calldata(void *data)
4365 struct nfs4_unlockdata *calldata = data;
4366 nfs_free_seqid(calldata->arg.seqid);
4367 nfs4_put_lock_state(calldata->lsp);
4368 put_nfs_open_context(calldata->ctx);
4372 static void nfs4_locku_done(struct rpc_task *task, void *data)
4374 struct nfs4_unlockdata *calldata = data;
4376 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4378 switch (task->tk_status) {
4380 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4381 &calldata->res.stateid);
4382 renew_lease(calldata->server, calldata->timestamp);
4384 case -NFS4ERR_BAD_STATEID:
4385 case -NFS4ERR_OLD_STATEID:
4386 case -NFS4ERR_STALE_STATEID:
4387 case -NFS4ERR_EXPIRED:
4390 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4391 rpc_restart_call_prepare(task);
4395 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4397 struct nfs4_unlockdata *calldata = data;
4399 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4401 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4402 /* Note: exit _without_ running nfs4_locku_done */
4403 task->tk_action = NULL;
4406 calldata->timestamp = jiffies;
4407 if (nfs4_setup_sequence(calldata->server,
4408 &calldata->arg.seq_args,
4409 &calldata->res.seq_res, task))
4411 rpc_call_start(task);
4414 static const struct rpc_call_ops nfs4_locku_ops = {
4415 .rpc_call_prepare = nfs4_locku_prepare,
4416 .rpc_call_done = nfs4_locku_done,
4417 .rpc_release = nfs4_locku_release_calldata,
4420 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4421 struct nfs_open_context *ctx,
4422 struct nfs4_lock_state *lsp,
4423 struct nfs_seqid *seqid)
4425 struct nfs4_unlockdata *data;
4426 struct rpc_message msg = {
4427 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4428 .rpc_cred = ctx->cred,
4430 struct rpc_task_setup task_setup_data = {
4431 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4432 .rpc_message = &msg,
4433 .callback_ops = &nfs4_locku_ops,
4434 .workqueue = nfsiod_workqueue,
4435 .flags = RPC_TASK_ASYNC,
4438 /* Ensure this is an unlock - when canceling a lock, the
4439 * canceled lock is passed in, and it won't be an unlock.
4441 fl->fl_type = F_UNLCK;
4443 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4445 nfs_free_seqid(seqid);
4446 return ERR_PTR(-ENOMEM);
4449 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4450 msg.rpc_argp = &data->arg;
4451 msg.rpc_resp = &data->res;
4452 task_setup_data.callback_data = data;
4453 return rpc_run_task(&task_setup_data);
4456 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4458 struct nfs_inode *nfsi = NFS_I(state->inode);
4459 struct nfs_seqid *seqid;
4460 struct nfs4_lock_state *lsp;
4461 struct rpc_task *task;
4463 unsigned char fl_flags = request->fl_flags;
4465 status = nfs4_set_lock_state(state, request);
4466 /* Unlock _before_ we do the RPC call */
4467 request->fl_flags |= FL_EXISTS;
4468 down_read(&nfsi->rwsem);
4469 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4470 up_read(&nfsi->rwsem);
4473 up_read(&nfsi->rwsem);
4476 /* Is this a delegated lock? */
4477 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4479 lsp = request->fl_u.nfs4_fl.owner;
4480 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4484 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4485 status = PTR_ERR(task);
4488 status = nfs4_wait_for_completion_rpc_task(task);
4491 request->fl_flags = fl_flags;
4495 struct nfs4_lockdata {
4496 struct nfs_lock_args arg;
4497 struct nfs_lock_res res;
4498 struct nfs4_lock_state *lsp;
4499 struct nfs_open_context *ctx;
4500 struct file_lock fl;
4501 unsigned long timestamp;
4504 struct nfs_server *server;
4507 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4508 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4511 struct nfs4_lockdata *p;
4512 struct inode *inode = lsp->ls_state->inode;
4513 struct nfs_server *server = NFS_SERVER(inode);
4515 p = kzalloc(sizeof(*p), gfp_mask);
4519 p->arg.fh = NFS_FH(inode);
4521 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4522 if (p->arg.open_seqid == NULL)
4524 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4525 if (p->arg.lock_seqid == NULL)
4526 goto out_free_seqid;
4527 p->arg.lock_stateid = &lsp->ls_stateid;
4528 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4529 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4530 p->arg.lock_owner.s_dev = server->s_dev;
4531 p->res.lock_seqid = p->arg.lock_seqid;
4534 atomic_inc(&lsp->ls_count);
4535 p->ctx = get_nfs_open_context(ctx);
4536 memcpy(&p->fl, fl, sizeof(p->fl));
4539 nfs_free_seqid(p->arg.open_seqid);
4545 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4547 struct nfs4_lockdata *data = calldata;
4548 struct nfs4_state *state = data->lsp->ls_state;
4550 dprintk("%s: begin!\n", __func__);
4551 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4553 /* Do we need to do an open_to_lock_owner? */
4554 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4555 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4557 data->arg.open_stateid = &state->stateid;
4558 data->arg.new_lock_owner = 1;
4559 data->res.open_seqid = data->arg.open_seqid;
4561 data->arg.new_lock_owner = 0;
4562 data->timestamp = jiffies;
4563 if (nfs4_setup_sequence(data->server,
4564 &data->arg.seq_args,
4565 &data->res.seq_res, task))
4567 rpc_call_start(task);
4568 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4571 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4573 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4574 nfs4_lock_prepare(task, calldata);
4577 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4579 struct nfs4_lockdata *data = calldata;
4581 dprintk("%s: begin!\n", __func__);
4583 if (!nfs4_sequence_done(task, &data->res.seq_res))
4586 data->rpc_status = task->tk_status;
4587 if (data->arg.new_lock_owner != 0) {
4588 if (data->rpc_status == 0)
4589 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4593 if (data->rpc_status == 0) {
4594 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4595 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4596 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4599 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4602 static void nfs4_lock_release(void *calldata)
4604 struct nfs4_lockdata *data = calldata;
4606 dprintk("%s: begin!\n", __func__);
4607 nfs_free_seqid(data->arg.open_seqid);
4608 if (data->cancelled != 0) {
4609 struct rpc_task *task;
4610 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4611 data->arg.lock_seqid);
4613 rpc_put_task_async(task);
4614 dprintk("%s: cancelling lock!\n", __func__);
4616 nfs_free_seqid(data->arg.lock_seqid);
4617 nfs4_put_lock_state(data->lsp);
4618 put_nfs_open_context(data->ctx);
4620 dprintk("%s: done!\n", __func__);
4623 static const struct rpc_call_ops nfs4_lock_ops = {
4624 .rpc_call_prepare = nfs4_lock_prepare,
4625 .rpc_call_done = nfs4_lock_done,
4626 .rpc_release = nfs4_lock_release,
4629 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4630 .rpc_call_prepare = nfs4_recover_lock_prepare,
4631 .rpc_call_done = nfs4_lock_done,
4632 .rpc_release = nfs4_lock_release,
4635 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4638 case -NFS4ERR_ADMIN_REVOKED:
4639 case -NFS4ERR_BAD_STATEID:
4640 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4641 if (new_lock_owner != 0 ||
4642 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4643 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4645 case -NFS4ERR_STALE_STATEID:
4646 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4647 case -NFS4ERR_EXPIRED:
4648 nfs4_schedule_lease_recovery(server->nfs_client);
4652 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4654 struct nfs4_lockdata *data;
4655 struct rpc_task *task;
4656 struct rpc_message msg = {
4657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4658 .rpc_cred = state->owner->so_cred,
4660 struct rpc_task_setup task_setup_data = {
4661 .rpc_client = NFS_CLIENT(state->inode),
4662 .rpc_message = &msg,
4663 .callback_ops = &nfs4_lock_ops,
4664 .workqueue = nfsiod_workqueue,
4665 .flags = RPC_TASK_ASYNC,
4669 dprintk("%s: begin!\n", __func__);
4670 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4671 fl->fl_u.nfs4_fl.owner,
4672 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4676 data->arg.block = 1;
4677 if (recovery_type > NFS_LOCK_NEW) {
4678 if (recovery_type == NFS_LOCK_RECLAIM)
4679 data->arg.reclaim = NFS_LOCK_RECLAIM;
4680 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4682 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4683 msg.rpc_argp = &data->arg;
4684 msg.rpc_resp = &data->res;
4685 task_setup_data.callback_data = data;
4686 task = rpc_run_task(&task_setup_data);
4688 return PTR_ERR(task);
4689 ret = nfs4_wait_for_completion_rpc_task(task);
4691 ret = data->rpc_status;
4693 nfs4_handle_setlk_error(data->server, data->lsp,
4694 data->arg.new_lock_owner, ret);
4696 data->cancelled = 1;
4698 dprintk("%s: done, ret = %d!\n", __func__, ret);
4702 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4704 struct nfs_server *server = NFS_SERVER(state->inode);
4705 struct nfs4_exception exception = {
4706 .inode = state->inode,
4711 /* Cache the lock if possible... */
4712 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4714 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4715 if (err != -NFS4ERR_DELAY)
4717 nfs4_handle_exception(server, err, &exception);
4718 } while (exception.retry);
4722 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4724 struct nfs_server *server = NFS_SERVER(state->inode);
4725 struct nfs4_exception exception = {
4726 .inode = state->inode,
4730 err = nfs4_set_lock_state(state, request);
4734 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4736 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4740 case -NFS4ERR_GRACE:
4741 case -NFS4ERR_DELAY:
4742 nfs4_handle_exception(server, err, &exception);
4745 } while (exception.retry);
4750 #if defined(CONFIG_NFS_V4_1)
4752 * nfs41_check_expired_locks - possibly free a lock stateid
4754 * @state: NFSv4 state for an inode
4756 * Returns NFS_OK if recovery for this stateid is now finished.
4757 * Otherwise a negative NFS4ERR value is returned.
4759 static int nfs41_check_expired_locks(struct nfs4_state *state)
4761 int status, ret = -NFS4ERR_BAD_STATEID;
4762 struct nfs4_lock_state *lsp;
4763 struct nfs_server *server = NFS_SERVER(state->inode);
4765 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4766 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4767 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4768 if (status != NFS_OK) {
4769 /* Free the stateid unless the server
4770 * informs us the stateid is unrecognized. */
4771 if (status != -NFS4ERR_BAD_STATEID)
4772 nfs41_free_stateid(server,
4774 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4783 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4785 int status = NFS_OK;
4787 if (test_bit(LK_STATE_IN_USE, &state->flags))
4788 status = nfs41_check_expired_locks(state);
4789 if (status != NFS_OK)
4790 status = nfs4_lock_expired(state, request);
4795 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4797 struct nfs_inode *nfsi = NFS_I(state->inode);
4798 unsigned char fl_flags = request->fl_flags;
4799 int status = -ENOLCK;
4801 if ((fl_flags & FL_POSIX) &&
4802 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4804 /* Is this a delegated open? */
4805 status = nfs4_set_lock_state(state, request);
4808 request->fl_flags |= FL_ACCESS;
4809 status = do_vfs_lock(request->fl_file, request);
4812 down_read(&nfsi->rwsem);
4813 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4814 /* Yes: cache locks! */
4815 /* ...but avoid races with delegation recall... */
4816 request->fl_flags = fl_flags & ~FL_SLEEP;
4817 status = do_vfs_lock(request->fl_file, request);
4820 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4823 /* Note: we always want to sleep here! */
4824 request->fl_flags = fl_flags | FL_SLEEP;
4825 if (do_vfs_lock(request->fl_file, request) < 0)
4826 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4827 "manager!\n", __func__);
4829 up_read(&nfsi->rwsem);
4831 request->fl_flags = fl_flags;
4835 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4837 struct nfs4_exception exception = {
4839 .inode = state->inode,
4844 err = _nfs4_proc_setlk(state, cmd, request);
4845 if (err == -NFS4ERR_DENIED)
4847 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4849 } while (exception.retry);
4854 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4856 struct nfs_open_context *ctx;
4857 struct nfs4_state *state;
4858 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4861 /* verify open state */
4862 ctx = nfs_file_open_context(filp);
4865 if (request->fl_start < 0 || request->fl_end < 0)
4868 if (IS_GETLK(cmd)) {
4870 return nfs4_proc_getlk(state, F_GETLK, request);
4874 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4877 if (request->fl_type == F_UNLCK) {
4879 return nfs4_proc_unlck(state, cmd, request);
4886 * Don't rely on the VFS having checked the file open mode,
4887 * since it won't do this for flock() locks.
4889 switch (request->fl_type) {
4891 if (!(filp->f_mode & FMODE_READ))
4895 if (!(filp->f_mode & FMODE_WRITE))
4900 status = nfs4_proc_setlk(state, cmd, request);
4901 if ((status != -EAGAIN) || IS_SETLK(cmd))
4903 timeout = nfs4_set_lock_task_retry(timeout);
4904 status = -ERESTARTSYS;
4907 } while(status < 0);
4911 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4913 struct nfs_server *server = NFS_SERVER(state->inode);
4914 struct nfs4_exception exception = { };
4917 err = nfs4_set_lock_state(state, fl);
4921 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4924 printk(KERN_ERR "NFS: %s: unhandled error "
4925 "%d.\n", __func__, err);
4929 case -NFS4ERR_EXPIRED:
4930 nfs4_schedule_stateid_recovery(server, state);
4931 case -NFS4ERR_STALE_CLIENTID:
4932 case -NFS4ERR_STALE_STATEID:
4933 nfs4_schedule_lease_recovery(server->nfs_client);
4935 case -NFS4ERR_BADSESSION:
4936 case -NFS4ERR_BADSLOT:
4937 case -NFS4ERR_BAD_HIGH_SLOT:
4938 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4939 case -NFS4ERR_DEADSESSION:
4940 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
4944 * The show must go on: exit, but mark the
4945 * stateid as needing recovery.
4947 case -NFS4ERR_DELEG_REVOKED:
4948 case -NFS4ERR_ADMIN_REVOKED:
4949 case -NFS4ERR_BAD_STATEID:
4950 case -NFS4ERR_OPENMODE:
4951 nfs4_schedule_stateid_recovery(server, state);
4956 * User RPCSEC_GSS context has expired.
4957 * We cannot recover this stateid now, so
4958 * skip it and allow recovery thread to
4964 case -NFS4ERR_DENIED:
4965 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4968 case -NFS4ERR_DELAY:
4971 err = nfs4_handle_exception(server, err, &exception);
4972 } while (exception.retry);
4977 struct nfs_release_lockowner_data {
4978 struct nfs4_lock_state *lsp;
4979 struct nfs_server *server;
4980 struct nfs_release_lockowner_args args;
4983 static void nfs4_release_lockowner_release(void *calldata)
4985 struct nfs_release_lockowner_data *data = calldata;
4986 nfs4_free_lock_state(data->server, data->lsp);
4990 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
4991 .rpc_release = nfs4_release_lockowner_release,
4994 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
4996 struct nfs_server *server = lsp->ls_state->owner->so_server;
4997 struct nfs_release_lockowner_data *data;
4998 struct rpc_message msg = {
4999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5002 if (server->nfs_client->cl_mvops->minor_version != 0)
5004 data = kmalloc(sizeof(*data), GFP_NOFS);
5008 data->server = server;
5009 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5010 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5011 data->args.lock_owner.s_dev = server->s_dev;
5012 msg.rpc_argp = &data->args;
5013 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5017 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5019 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5020 const void *buf, size_t buflen,
5021 int flags, int type)
5023 if (strcmp(key, "") != 0)
5026 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
5029 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5030 void *buf, size_t buflen, int type)
5032 if (strcmp(key, "") != 0)
5035 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
5038 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5039 size_t list_len, const char *name,
5040 size_t name_len, int type)
5042 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
5044 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5047 if (list && len <= list_len)
5048 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
5053 * nfs_fhget will use either the mounted_on_fileid or the fileid
5055 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5057 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5058 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5059 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
5060 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
5063 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
5064 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
5065 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5069 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5070 const struct qstr *name,
5071 struct nfs4_fs_locations *fs_locations,
5074 struct nfs_server *server = NFS_SERVER(dir);
5076 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
5078 struct nfs4_fs_locations_arg args = {
5079 .dir_fh = NFS_FH(dir),
5084 struct nfs4_fs_locations_res res = {
5085 .fs_locations = fs_locations,
5087 struct rpc_message msg = {
5088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5094 dprintk("%s: start\n", __func__);
5096 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5097 * is not supported */
5098 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5099 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5101 bitmask[0] |= FATTR4_WORD0_FILEID;
5103 nfs_fattr_init(&fs_locations->fattr);
5104 fs_locations->server = server;
5105 fs_locations->nlocations = 0;
5106 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5107 dprintk("%s: returned status = %d\n", __func__, status);
5111 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5112 const struct qstr *name,
5113 struct nfs4_fs_locations *fs_locations,
5116 struct nfs4_exception exception = { };
5119 err = nfs4_handle_exception(NFS_SERVER(dir),
5120 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5122 } while (exception.retry);
5126 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5129 struct nfs4_secinfo_arg args = {
5130 .dir_fh = NFS_FH(dir),
5133 struct nfs4_secinfo_res res = {
5136 struct rpc_message msg = {
5137 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5142 dprintk("NFS call secinfo %s\n", name->name);
5143 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5144 dprintk("NFS reply secinfo: %d\n", status);
5148 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5149 struct nfs4_secinfo_flavors *flavors)
5151 struct nfs4_exception exception = { };
5154 err = nfs4_handle_exception(NFS_SERVER(dir),
5155 _nfs4_proc_secinfo(dir, name, flavors),
5157 } while (exception.retry);
5161 #ifdef CONFIG_NFS_V4_1
5163 * Check the exchange flags returned by the server for invalid flags, having
5164 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5167 static int nfs4_check_cl_exchange_flags(u32 flags)
5169 if (flags & ~EXCHGID4_FLAG_MASK_R)
5171 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5172 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5174 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5178 return -NFS4ERR_INVAL;
5182 nfs41_same_server_scope(struct nfs41_server_scope *a,
5183 struct nfs41_server_scope *b)
5185 if (a->server_scope_sz == b->server_scope_sz &&
5186 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5193 * nfs4_proc_bind_conn_to_session()
5195 * The 4.1 client currently uses the same TCP connection for the
5196 * fore and backchannel.
5198 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
5201 struct nfs41_bind_conn_to_session_res res;
5202 struct rpc_message msg = {
5204 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5210 dprintk("--> %s\n", __func__);
5211 BUG_ON(clp == NULL);
5213 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5214 if (unlikely(res.session == NULL)) {
5219 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5221 if (memcmp(res.session->sess_id.data,
5222 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5223 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5227 if (res.dir != NFS4_CDFS4_BOTH) {
5228 dprintk("NFS: %s: Unexpected direction from server\n",
5233 if (res.use_conn_in_rdma_mode) {
5234 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5243 dprintk("<-- %s status= %d\n", __func__, status);
5248 * nfs4_proc_exchange_id()
5250 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5252 * Since the clientid has expired, all compounds using sessions
5253 * associated with the stale clientid will be returning
5254 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5255 * be in some phase of session reset.
5257 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5259 nfs4_verifier verifier;
5260 struct nfs41_exchange_id_args args = {
5261 .verifier = &verifier,
5263 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5265 struct nfs41_exchange_id_res res = {
5269 struct rpc_message msg = {
5270 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5276 nfs4_init_boot_verifier(clp, &verifier);
5277 args.id_len = scnprintf(args.id, sizeof(args.id),
5280 clp->cl_rpcclient->cl_nodename);
5281 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5282 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5283 args.id_len, args.id);
5285 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5287 if (unlikely(res.server_owner == NULL)) {
5292 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5294 if (unlikely(res.server_scope == NULL)) {
5296 goto out_server_owner;
5299 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5300 if (unlikely(res.impl_id == NULL)) {
5302 goto out_server_scope;
5305 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5307 status = nfs4_check_cl_exchange_flags(res.flags);
5310 clp->cl_clientid = res.clientid;
5311 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5312 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5313 clp->cl_seqid = res.seqid;
5315 kfree(clp->cl_serverowner);
5316 clp->cl_serverowner = res.server_owner;
5317 res.server_owner = NULL;
5319 /* use the most recent implementation id */
5320 kfree(clp->cl_implid);
5321 clp->cl_implid = res.impl_id;
5323 if (clp->cl_serverscope != NULL &&
5324 !nfs41_same_server_scope(clp->cl_serverscope,
5325 res.server_scope)) {
5326 dprintk("%s: server_scope mismatch detected\n",
5328 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5329 kfree(clp->cl_serverscope);
5330 clp->cl_serverscope = NULL;
5333 if (clp->cl_serverscope == NULL) {
5334 clp->cl_serverscope = res.server_scope;
5341 kfree(res.server_owner);
5343 kfree(res.server_scope);
5345 if (clp->cl_implid != NULL)
5346 dprintk("NFS reply exchange_id: Server Implementation ID: "
5347 "domain: %s, name: %s, date: %llu,%u\n",
5348 clp->cl_implid->domain, clp->cl_implid->name,
5349 clp->cl_implid->date.seconds,
5350 clp->cl_implid->date.nseconds);
5351 dprintk("NFS reply exchange_id: %d\n", status);
5355 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5356 struct rpc_cred *cred)
5358 struct rpc_message msg = {
5359 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5365 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5367 dprintk("NFS: Got error %d from the server %s on "
5368 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5372 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5373 struct rpc_cred *cred)
5378 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5379 ret = _nfs4_proc_destroy_clientid(clp, cred);
5381 case -NFS4ERR_DELAY:
5382 case -NFS4ERR_CLIENTID_BUSY:
5392 int nfs4_destroy_clientid(struct nfs_client *clp)
5394 struct rpc_cred *cred;
5397 if (clp->cl_mvops->minor_version < 1)
5399 if (clp->cl_exchange_flags == 0)
5401 cred = nfs4_get_exchange_id_cred(clp);
5402 ret = nfs4_proc_destroy_clientid(clp, cred);
5407 case -NFS4ERR_STALE_CLIENTID:
5408 clp->cl_exchange_flags = 0;
5414 struct nfs4_get_lease_time_data {
5415 struct nfs4_get_lease_time_args *args;
5416 struct nfs4_get_lease_time_res *res;
5417 struct nfs_client *clp;
5420 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5424 struct nfs4_get_lease_time_data *data =
5425 (struct nfs4_get_lease_time_data *)calldata;
5427 dprintk("--> %s\n", __func__);
5428 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5429 /* just setup sequence, do not trigger session recovery
5430 since we're invoked within one */
5431 ret = nfs41_setup_sequence(data->clp->cl_session,
5432 &data->args->la_seq_args,
5433 &data->res->lr_seq_res, task);
5435 BUG_ON(ret == -EAGAIN);
5436 rpc_call_start(task);
5437 dprintk("<-- %s\n", __func__);
5441 * Called from nfs4_state_manager thread for session setup, so don't recover
5442 * from sequence operation or clientid errors.
5444 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5446 struct nfs4_get_lease_time_data *data =
5447 (struct nfs4_get_lease_time_data *)calldata;
5449 dprintk("--> %s\n", __func__);
5450 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5452 switch (task->tk_status) {
5453 case -NFS4ERR_DELAY:
5454 case -NFS4ERR_GRACE:
5455 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5456 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5457 task->tk_status = 0;
5459 case -NFS4ERR_RETRY_UNCACHED_REP:
5460 rpc_restart_call_prepare(task);
5463 dprintk("<-- %s\n", __func__);
5466 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5467 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5468 .rpc_call_done = nfs4_get_lease_time_done,
5471 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5473 struct rpc_task *task;
5474 struct nfs4_get_lease_time_args args;
5475 struct nfs4_get_lease_time_res res = {
5476 .lr_fsinfo = fsinfo,
5478 struct nfs4_get_lease_time_data data = {
5483 struct rpc_message msg = {
5484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5488 struct rpc_task_setup task_setup = {
5489 .rpc_client = clp->cl_rpcclient,
5490 .rpc_message = &msg,
5491 .callback_ops = &nfs4_get_lease_time_ops,
5492 .callback_data = &data,
5493 .flags = RPC_TASK_TIMEOUT,
5497 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5498 dprintk("--> %s\n", __func__);
5499 task = rpc_run_task(&task_setup);
5502 status = PTR_ERR(task);
5504 status = task->tk_status;
5507 dprintk("<-- %s return %d\n", __func__, status);
5512 static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5514 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5517 static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5518 struct nfs4_slot *new,
5522 struct nfs4_slot *old = NULL;
5525 spin_lock(&tbl->slot_tbl_lock);
5529 tbl->max_slots = max_slots;
5531 tbl->highest_used_slotid = -1; /* no slot is currently used */
5532 for (i = 0; i < tbl->max_slots; i++)
5533 tbl->slots[i].seq_nr = ivalue;
5534 spin_unlock(&tbl->slot_tbl_lock);
5539 * (re)Initialise a slot table
5541 static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5544 struct nfs4_slot *new = NULL;
5547 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5548 max_reqs, tbl->max_slots);
5550 /* Does the newly negotiated max_reqs match the existing slot table? */
5551 if (max_reqs != tbl->max_slots) {
5552 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
5558 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5559 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5560 tbl, tbl->slots, tbl->max_slots);
5562 dprintk("<-- %s: return %d\n", __func__, ret);
5566 /* Destroy the slot table */
5567 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5569 if (session->fc_slot_table.slots != NULL) {
5570 kfree(session->fc_slot_table.slots);
5571 session->fc_slot_table.slots = NULL;
5573 if (session->bc_slot_table.slots != NULL) {
5574 kfree(session->bc_slot_table.slots);
5575 session->bc_slot_table.slots = NULL;
5581 * Initialize or reset the forechannel and backchannel tables
5583 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5585 struct nfs4_slot_table *tbl;
5588 dprintk("--> %s\n", __func__);
5590 tbl = &ses->fc_slot_table;
5591 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5592 if (status) /* -ENOMEM */
5595 tbl = &ses->bc_slot_table;
5596 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5597 if (status && tbl->slots == NULL)
5598 /* Fore and back channel share a connection so get
5599 * both slot tables or neither */
5600 nfs4_destroy_slot_tables(ses);
5604 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5606 struct nfs4_session *session;
5607 struct nfs4_slot_table *tbl;
5609 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5613 tbl = &session->fc_slot_table;
5614 tbl->highest_used_slotid = NFS4_NO_SLOT;
5615 spin_lock_init(&tbl->slot_tbl_lock);
5616 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5617 init_completion(&tbl->complete);
5619 tbl = &session->bc_slot_table;
5620 tbl->highest_used_slotid = NFS4_NO_SLOT;
5621 spin_lock_init(&tbl->slot_tbl_lock);
5622 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5623 init_completion(&tbl->complete);
5625 session->session_state = 1<<NFS4_SESSION_INITING;
5631 void nfs4_destroy_session(struct nfs4_session *session)
5633 struct rpc_xprt *xprt;
5634 struct rpc_cred *cred;
5636 cred = nfs4_get_exchange_id_cred(session->clp);
5637 nfs4_proc_destroy_session(session, cred);
5642 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5644 dprintk("%s Destroy backchannel for xprt %p\n",
5646 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5647 nfs4_destroy_slot_tables(session);
5652 * Initialize the values to be used by the client in CREATE_SESSION
5653 * If nfs4_init_session set the fore channel request and response sizes,
5656 * Set the back channel max_resp_sz_cached to zero to force the client to
5657 * always set csa_cachethis to FALSE because the current implementation
5658 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5660 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5662 struct nfs4_session *session = args->client->cl_session;
5663 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5664 mxresp_sz = session->fc_attrs.max_resp_sz;
5667 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5669 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5670 /* Fore channel attributes */
5671 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5672 args->fc_attrs.max_resp_sz = mxresp_sz;
5673 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5674 args->fc_attrs.max_reqs = max_session_slots;
5676 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5677 "max_ops=%u max_reqs=%u\n",
5679 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5680 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5682 /* Back channel attributes */
5683 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5684 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5685 args->bc_attrs.max_resp_sz_cached = 0;
5686 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5687 args->bc_attrs.max_reqs = 1;
5689 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5690 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5692 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5693 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5694 args->bc_attrs.max_reqs);
5697 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5699 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5700 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5702 if (rcvd->max_resp_sz > sent->max_resp_sz)
5705 * Our requested max_ops is the minimum we need; we're not
5706 * prepared to break up compounds into smaller pieces than that.
5707 * So, no point even trying to continue if the server won't
5710 if (rcvd->max_ops < sent->max_ops)
5712 if (rcvd->max_reqs == 0)
5714 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5715 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5719 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5721 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5722 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5724 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5726 if (rcvd->max_resp_sz < sent->max_resp_sz)
5728 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5730 /* These would render the backchannel useless: */
5731 if (rcvd->max_ops != sent->max_ops)
5733 if (rcvd->max_reqs != sent->max_reqs)
5738 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5739 struct nfs4_session *session)
5743 ret = nfs4_verify_fore_channel_attrs(args, session);
5746 return nfs4_verify_back_channel_attrs(args, session);
5749 static int _nfs4_proc_create_session(struct nfs_client *clp,
5750 struct rpc_cred *cred)
5752 struct nfs4_session *session = clp->cl_session;
5753 struct nfs41_create_session_args args = {
5755 .cb_program = NFS4_CALLBACK,
5757 struct nfs41_create_session_res res = {
5760 struct rpc_message msg = {
5761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5768 nfs4_init_channel_attrs(&args);
5769 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5771 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5774 /* Verify the session's negotiated channel_attrs values */
5775 status = nfs4_verify_channel_attrs(&args, session);
5777 /* Increment the clientid slot sequence id */
5785 * Issues a CREATE_SESSION operation to the server.
5786 * It is the responsibility of the caller to verify the session is
5787 * expired before calling this routine.
5789 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
5793 struct nfs4_session *session = clp->cl_session;
5795 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5797 status = _nfs4_proc_create_session(clp, cred);
5801 /* Init or reset the session slot tables */
5802 status = nfs4_setup_session_slot_tables(session);
5803 dprintk("slot table setup returned %d\n", status);
5807 ptr = (unsigned *)&session->sess_id.data[0];
5808 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5809 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5811 dprintk("<-- %s\n", __func__);
5816 * Issue the over-the-wire RPC DESTROY_SESSION.
5817 * The caller must serialize access to this routine.
5819 int nfs4_proc_destroy_session(struct nfs4_session *session,
5820 struct rpc_cred *cred)
5822 struct rpc_message msg = {
5823 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5824 .rpc_argp = session,
5829 dprintk("--> nfs4_proc_destroy_session\n");
5831 /* session is still being setup */
5832 if (session->clp->cl_cons_state != NFS_CS_READY)
5835 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5838 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
5839 "Session has been destroyed regardless...\n", status);
5841 dprintk("<-- nfs4_proc_destroy_session\n");
5846 * With sessions, the client is not marked ready until after a
5847 * successful EXCHANGE_ID and CREATE_SESSION.
5849 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5850 * other versions of NFS can be tried.
5852 static int nfs41_check_session_ready(struct nfs_client *clp)
5856 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
5857 ret = nfs4_client_recover_expired_lease(clp);
5861 if (clp->cl_cons_state < NFS_CS_READY)
5862 return -EPROTONOSUPPORT;
5867 int nfs4_init_session(struct nfs_server *server)
5869 struct nfs_client *clp = server->nfs_client;
5870 struct nfs4_session *session;
5871 unsigned int rsize, wsize;
5873 if (!nfs4_has_session(clp))
5876 session = clp->cl_session;
5877 spin_lock(&clp->cl_lock);
5878 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5880 rsize = server->rsize;
5882 rsize = NFS_MAX_FILE_IO_SIZE;
5883 wsize = server->wsize;
5885 wsize = NFS_MAX_FILE_IO_SIZE;
5887 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5888 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5890 spin_unlock(&clp->cl_lock);
5892 return nfs41_check_session_ready(clp);
5895 int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
5897 struct nfs4_session *session = clp->cl_session;
5900 spin_lock(&clp->cl_lock);
5901 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5903 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5904 * DS lease to be equal to the MDS lease.
5906 clp->cl_lease_time = lease_time;
5907 clp->cl_last_renewal = jiffies;
5909 spin_unlock(&clp->cl_lock);
5911 ret = nfs41_check_session_ready(clp);
5914 /* Test for the DS role */
5915 if (!is_ds_client(clp))
5919 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5923 * Renew the cl_session lease.
5925 struct nfs4_sequence_data {
5926 struct nfs_client *clp;
5927 struct nfs4_sequence_args args;
5928 struct nfs4_sequence_res res;
5931 static void nfs41_sequence_release(void *data)
5933 struct nfs4_sequence_data *calldata = data;
5934 struct nfs_client *clp = calldata->clp;
5936 if (atomic_read(&clp->cl_count) > 1)
5937 nfs4_schedule_state_renewal(clp);
5938 nfs_put_client(clp);
5942 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5944 switch(task->tk_status) {
5945 case -NFS4ERR_DELAY:
5946 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5949 nfs4_schedule_lease_recovery(clp);
5954 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5956 struct nfs4_sequence_data *calldata = data;
5957 struct nfs_client *clp = calldata->clp;
5959 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5962 if (task->tk_status < 0) {
5963 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5964 if (atomic_read(&clp->cl_count) == 1)
5967 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5968 rpc_restart_call_prepare(task);
5972 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5974 dprintk("<-- %s\n", __func__);
5977 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5979 struct nfs4_sequence_data *calldata = data;
5980 struct nfs_client *clp = calldata->clp;
5981 struct nfs4_sequence_args *args;
5982 struct nfs4_sequence_res *res;
5984 args = task->tk_msg.rpc_argp;
5985 res = task->tk_msg.rpc_resp;
5987 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5989 rpc_call_start(task);
5992 static const struct rpc_call_ops nfs41_sequence_ops = {
5993 .rpc_call_done = nfs41_sequence_call_done,
5994 .rpc_call_prepare = nfs41_sequence_prepare,
5995 .rpc_release = nfs41_sequence_release,
5998 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6000 struct nfs4_sequence_data *calldata;
6001 struct rpc_message msg = {
6002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6005 struct rpc_task_setup task_setup_data = {
6006 .rpc_client = clp->cl_rpcclient,
6007 .rpc_message = &msg,
6008 .callback_ops = &nfs41_sequence_ops,
6009 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
6012 if (!atomic_inc_not_zero(&clp->cl_count))
6013 return ERR_PTR(-EIO);
6014 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6015 if (calldata == NULL) {
6016 nfs_put_client(clp);
6017 return ERR_PTR(-ENOMEM);
6019 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
6020 msg.rpc_argp = &calldata->args;
6021 msg.rpc_resp = &calldata->res;
6022 calldata->clp = clp;
6023 task_setup_data.callback_data = calldata;
6025 return rpc_run_task(&task_setup_data);
6028 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
6030 struct rpc_task *task;
6033 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6035 task = _nfs41_proc_sequence(clp, cred);
6037 ret = PTR_ERR(task);
6039 rpc_put_task_async(task);
6040 dprintk("<-- %s status=%d\n", __func__, ret);
6044 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6046 struct rpc_task *task;
6049 task = _nfs41_proc_sequence(clp, cred);
6051 ret = PTR_ERR(task);
6054 ret = rpc_wait_for_completion_task(task);
6056 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6058 if (task->tk_status == 0)
6059 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
6060 ret = task->tk_status;
6064 dprintk("<-- %s status=%d\n", __func__, ret);
6068 struct nfs4_reclaim_complete_data {
6069 struct nfs_client *clp;
6070 struct nfs41_reclaim_complete_args arg;
6071 struct nfs41_reclaim_complete_res res;
6074 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6076 struct nfs4_reclaim_complete_data *calldata = data;
6078 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
6079 if (nfs41_setup_sequence(calldata->clp->cl_session,
6080 &calldata->arg.seq_args,
6081 &calldata->res.seq_res, task))
6084 rpc_call_start(task);
6087 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6089 switch(task->tk_status) {
6091 case -NFS4ERR_COMPLETE_ALREADY:
6092 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6094 case -NFS4ERR_DELAY:
6095 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6097 case -NFS4ERR_RETRY_UNCACHED_REP:
6100 nfs4_schedule_lease_recovery(clp);
6105 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6107 struct nfs4_reclaim_complete_data *calldata = data;
6108 struct nfs_client *clp = calldata->clp;
6109 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6111 dprintk("--> %s\n", __func__);
6112 if (!nfs41_sequence_done(task, res))
6115 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6116 rpc_restart_call_prepare(task);
6119 dprintk("<-- %s\n", __func__);
6122 static void nfs4_free_reclaim_complete_data(void *data)
6124 struct nfs4_reclaim_complete_data *calldata = data;
6129 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6130 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6131 .rpc_call_done = nfs4_reclaim_complete_done,
6132 .rpc_release = nfs4_free_reclaim_complete_data,
6136 * Issue a global reclaim complete.
6138 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6140 struct nfs4_reclaim_complete_data *calldata;
6141 struct rpc_task *task;
6142 struct rpc_message msg = {
6143 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6145 struct rpc_task_setup task_setup_data = {
6146 .rpc_client = clp->cl_rpcclient,
6147 .rpc_message = &msg,
6148 .callback_ops = &nfs4_reclaim_complete_call_ops,
6149 .flags = RPC_TASK_ASYNC,
6151 int status = -ENOMEM;
6153 dprintk("--> %s\n", __func__);
6154 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
6155 if (calldata == NULL)
6157 calldata->clp = clp;
6158 calldata->arg.one_fs = 0;
6160 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6161 msg.rpc_argp = &calldata->arg;
6162 msg.rpc_resp = &calldata->res;
6163 task_setup_data.callback_data = calldata;
6164 task = rpc_run_task(&task_setup_data);
6166 status = PTR_ERR(task);
6169 status = nfs4_wait_for_completion_rpc_task(task);
6171 status = task->tk_status;
6175 dprintk("<-- %s status=%d\n", __func__, status);
6180 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6182 struct nfs4_layoutget *lgp = calldata;
6183 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6185 dprintk("--> %s\n", __func__);
6186 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6187 * right now covering the LAYOUTGET we are about to send.
6188 * However, that is not so catastrophic, and there seems
6189 * to be no way to prevent it completely.
6191 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
6192 &lgp->res.seq_res, task))
6194 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6195 NFS_I(lgp->args.inode)->layout,
6196 lgp->args.ctx->state)) {
6197 rpc_exit(task, NFS4_OK);
6200 rpc_call_start(task);
6203 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6205 struct nfs4_layoutget *lgp = calldata;
6206 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6208 dprintk("--> %s\n", __func__);
6210 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6213 switch (task->tk_status) {
6216 case -NFS4ERR_LAYOUTTRYLATER:
6217 case -NFS4ERR_RECALLCONFLICT:
6218 task->tk_status = -NFS4ERR_DELAY;
6221 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6222 rpc_restart_call_prepare(task);
6226 dprintk("<-- %s\n", __func__);
6229 static size_t max_response_pages(struct nfs_server *server)
6231 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6232 return nfs_page_array_len(0, max_resp_sz);
6235 static void nfs4_free_pages(struct page **pages, size_t size)
6242 for (i = 0; i < size; i++) {
6245 __free_page(pages[i]);
6250 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6252 struct page **pages;
6255 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6257 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6261 for (i = 0; i < size; i++) {
6262 pages[i] = alloc_page(gfp_flags);
6264 dprintk("%s: failed to allocate page\n", __func__);
6265 nfs4_free_pages(pages, size);
6273 static void nfs4_layoutget_release(void *calldata)
6275 struct nfs4_layoutget *lgp = calldata;
6276 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6277 size_t max_pages = max_response_pages(server);
6279 dprintk("--> %s\n", __func__);
6280 nfs4_free_pages(lgp->args.layout.pages, max_pages);
6281 put_nfs_open_context(lgp->args.ctx);
6283 dprintk("<-- %s\n", __func__);
6286 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6287 .rpc_call_prepare = nfs4_layoutget_prepare,
6288 .rpc_call_done = nfs4_layoutget_done,
6289 .rpc_release = nfs4_layoutget_release,
6292 void nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
6294 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6295 size_t max_pages = max_response_pages(server);
6296 struct rpc_task *task;
6297 struct rpc_message msg = {
6298 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6299 .rpc_argp = &lgp->args,
6300 .rpc_resp = &lgp->res,
6302 struct rpc_task_setup task_setup_data = {
6303 .rpc_client = server->client,
6304 .rpc_message = &msg,
6305 .callback_ops = &nfs4_layoutget_call_ops,
6306 .callback_data = lgp,
6307 .flags = RPC_TASK_ASYNC,
6311 dprintk("--> %s\n", __func__);
6313 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6314 if (!lgp->args.layout.pages) {
6315 nfs4_layoutget_release(lgp);
6318 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6320 lgp->res.layoutp = &lgp->args.layout;
6321 lgp->res.seq_res.sr_slot = NULL;
6322 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6323 task = rpc_run_task(&task_setup_data);
6326 status = nfs4_wait_for_completion_rpc_task(task);
6328 status = task->tk_status;
6330 status = pnfs_layout_process(lgp);
6332 dprintk("<-- %s status=%d\n", __func__, status);
6337 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6339 struct nfs4_layoutreturn *lrp = calldata;
6341 dprintk("--> %s\n", __func__);
6342 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
6343 &lrp->res.seq_res, task))
6345 rpc_call_start(task);
6348 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6350 struct nfs4_layoutreturn *lrp = calldata;
6351 struct nfs_server *server;
6352 struct pnfs_layout_hdr *lo = lrp->args.layout;
6354 dprintk("--> %s\n", __func__);
6356 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6359 server = NFS_SERVER(lrp->args.inode);
6360 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6361 rpc_restart_call_prepare(task);
6364 spin_lock(&lo->plh_inode->i_lock);
6365 if (task->tk_status == 0 && lrp->res.lrs_present)
6366 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6367 lo->plh_block_lgets--;
6368 spin_unlock(&lo->plh_inode->i_lock);
6369 dprintk("<-- %s\n", __func__);
6372 static void nfs4_layoutreturn_release(void *calldata)
6374 struct nfs4_layoutreturn *lrp = calldata;
6376 dprintk("--> %s\n", __func__);
6377 put_layout_hdr(lrp->args.layout);
6379 dprintk("<-- %s\n", __func__);
6382 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6383 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6384 .rpc_call_done = nfs4_layoutreturn_done,
6385 .rpc_release = nfs4_layoutreturn_release,
6388 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6390 struct rpc_task *task;
6391 struct rpc_message msg = {
6392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6393 .rpc_argp = &lrp->args,
6394 .rpc_resp = &lrp->res,
6396 struct rpc_task_setup task_setup_data = {
6397 .rpc_client = lrp->clp->cl_rpcclient,
6398 .rpc_message = &msg,
6399 .callback_ops = &nfs4_layoutreturn_call_ops,
6400 .callback_data = lrp,
6404 dprintk("--> %s\n", __func__);
6405 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6406 task = rpc_run_task(&task_setup_data);
6408 return PTR_ERR(task);
6409 status = task->tk_status;
6410 dprintk("<-- %s status=%d\n", __func__, status);
6416 * Retrieve the list of Data Server devices from the MDS.
6418 static int _nfs4_getdevicelist(struct nfs_server *server,
6419 const struct nfs_fh *fh,
6420 struct pnfs_devicelist *devlist)
6422 struct nfs4_getdevicelist_args args = {
6424 .layoutclass = server->pnfs_curr_ld->id,
6426 struct nfs4_getdevicelist_res res = {
6429 struct rpc_message msg = {
6430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6436 dprintk("--> %s\n", __func__);
6437 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6439 dprintk("<-- %s status=%d\n", __func__, status);
6443 int nfs4_proc_getdevicelist(struct nfs_server *server,
6444 const struct nfs_fh *fh,
6445 struct pnfs_devicelist *devlist)
6447 struct nfs4_exception exception = { };
6451 err = nfs4_handle_exception(server,
6452 _nfs4_getdevicelist(server, fh, devlist),
6454 } while (exception.retry);
6456 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6457 err, devlist->num_devs);
6461 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6464 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6466 struct nfs4_getdeviceinfo_args args = {
6469 struct nfs4_getdeviceinfo_res res = {
6472 struct rpc_message msg = {
6473 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6479 dprintk("--> %s\n", __func__);
6480 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6481 dprintk("<-- %s status=%d\n", __func__, status);
6486 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6488 struct nfs4_exception exception = { };
6492 err = nfs4_handle_exception(server,
6493 _nfs4_proc_getdeviceinfo(server, pdev),
6495 } while (exception.retry);
6498 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6500 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6502 struct nfs4_layoutcommit_data *data = calldata;
6503 struct nfs_server *server = NFS_SERVER(data->args.inode);
6505 if (nfs4_setup_sequence(server, &data->args.seq_args,
6506 &data->res.seq_res, task))
6508 rpc_call_start(task);
6512 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6514 struct nfs4_layoutcommit_data *data = calldata;
6515 struct nfs_server *server = NFS_SERVER(data->args.inode);
6517 if (!nfs4_sequence_done(task, &data->res.seq_res))
6520 switch (task->tk_status) { /* Just ignore these failures */
6521 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6522 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6523 case -NFS4ERR_BADLAYOUT: /* no layout */
6524 case -NFS4ERR_GRACE: /* loca_recalim always false */
6525 task->tk_status = 0;
6528 nfs_post_op_update_inode_force_wcc(data->args.inode,
6532 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6533 rpc_restart_call_prepare(task);
6539 static void nfs4_layoutcommit_release(void *calldata)
6541 struct nfs4_layoutcommit_data *data = calldata;
6542 struct pnfs_layout_segment *lseg, *tmp;
6543 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6545 pnfs_cleanup_layoutcommit(data);
6546 /* Matched by references in pnfs_set_layoutcommit */
6547 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6548 list_del_init(&lseg->pls_lc_list);
6549 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6554 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6555 smp_mb__after_clear_bit();
6556 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6558 put_rpccred(data->cred);
6562 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6563 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6564 .rpc_call_done = nfs4_layoutcommit_done,
6565 .rpc_release = nfs4_layoutcommit_release,
6569 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6571 struct rpc_message msg = {
6572 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6573 .rpc_argp = &data->args,
6574 .rpc_resp = &data->res,
6575 .rpc_cred = data->cred,
6577 struct rpc_task_setup task_setup_data = {
6578 .task = &data->task,
6579 .rpc_client = NFS_CLIENT(data->args.inode),
6580 .rpc_message = &msg,
6581 .callback_ops = &nfs4_layoutcommit_ops,
6582 .callback_data = data,
6583 .flags = RPC_TASK_ASYNC,
6585 struct rpc_task *task;
6588 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6589 "lbw: %llu inode %lu\n",
6590 data->task.tk_pid, sync,
6591 data->args.lastbytewritten,
6592 data->args.inode->i_ino);
6594 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6595 task = rpc_run_task(&task_setup_data);
6597 return PTR_ERR(task);
6600 status = nfs4_wait_for_completion_rpc_task(task);
6603 status = task->tk_status;
6605 dprintk("%s: status %d\n", __func__, status);
6611 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6612 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6614 struct nfs41_secinfo_no_name_args args = {
6615 .style = SECINFO_STYLE_CURRENT_FH,
6617 struct nfs4_secinfo_res res = {
6620 struct rpc_message msg = {
6621 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6625 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6629 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6630 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6632 struct nfs4_exception exception = { };
6635 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6638 case -NFS4ERR_WRONGSEC:
6639 case -NFS4ERR_NOTSUPP:
6642 err = nfs4_handle_exception(server, err, &exception);
6644 } while (exception.retry);
6650 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6651 struct nfs_fsinfo *info)
6655 rpc_authflavor_t flavor;
6656 struct nfs4_secinfo_flavors *flavors;
6658 page = alloc_page(GFP_KERNEL);
6664 flavors = page_address(page);
6665 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6668 * Fall back on "guess and check" method if
6669 * the server doesn't support SECINFO_NO_NAME
6671 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6672 err = nfs4_find_root_sec(server, fhandle, info);
6678 flavor = nfs_find_best_sec(flavors);
6680 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6690 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6693 struct nfs41_test_stateid_args args = {
6696 struct nfs41_test_stateid_res res;
6697 struct rpc_message msg = {
6698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6703 dprintk("NFS call test_stateid %p\n", stateid);
6704 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6705 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6706 if (status != NFS_OK) {
6707 dprintk("NFS reply test_stateid: failed, %d\n", status);
6710 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
6715 * nfs41_test_stateid - perform a TEST_STATEID operation
6717 * @server: server / transport on which to perform the operation
6718 * @stateid: state ID to test
6720 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6721 * Otherwise a negative NFS4ERR value is returned if the operation
6722 * failed or the state ID is not currently valid.
6724 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6726 struct nfs4_exception exception = { };
6729 err = _nfs41_test_stateid(server, stateid);
6730 if (err != -NFS4ERR_DELAY)
6732 nfs4_handle_exception(server, err, &exception);
6733 } while (exception.retry);
6737 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6739 struct nfs41_free_stateid_args args = {
6742 struct nfs41_free_stateid_res res;
6743 struct rpc_message msg = {
6744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6750 dprintk("NFS call free_stateid %p\n", stateid);
6751 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6752 status = nfs4_call_sync_sequence(server->client, server, &msg,
6753 &args.seq_args, &res.seq_res, 1);
6754 dprintk("NFS reply free_stateid: %d\n", status);
6759 * nfs41_free_stateid - perform a FREE_STATEID operation
6761 * @server: server / transport on which to perform the operation
6762 * @stateid: state ID to release
6764 * Returns NFS_OK if the server freed "stateid". Otherwise a
6765 * negative NFS4ERR value is returned.
6767 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6769 struct nfs4_exception exception = { };
6772 err = _nfs4_free_stateid(server, stateid);
6773 if (err != -NFS4ERR_DELAY)
6775 nfs4_handle_exception(server, err, &exception);
6776 } while (exception.retry);
6780 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6781 const nfs4_stateid *s2)
6783 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6786 if (s1->seqid == s2->seqid)
6788 if (s1->seqid == 0 || s2->seqid == 0)
6794 #endif /* CONFIG_NFS_V4_1 */
6796 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6797 const nfs4_stateid *s2)
6799 return nfs4_stateid_match(s1, s2);
6803 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6804 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6805 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6806 .recover_open = nfs4_open_reclaim,
6807 .recover_lock = nfs4_lock_reclaim,
6808 .establish_clid = nfs4_init_clientid,
6809 .get_clid_cred = nfs4_get_setclientid_cred,
6812 #if defined(CONFIG_NFS_V4_1)
6813 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6814 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6815 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6816 .recover_open = nfs4_open_reclaim,
6817 .recover_lock = nfs4_lock_reclaim,
6818 .establish_clid = nfs41_init_clientid,
6819 .get_clid_cred = nfs4_get_exchange_id_cred,
6820 .reclaim_complete = nfs41_proc_reclaim_complete,
6822 #endif /* CONFIG_NFS_V4_1 */
6824 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6825 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6826 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6827 .recover_open = nfs4_open_expired,
6828 .recover_lock = nfs4_lock_expired,
6829 .establish_clid = nfs4_init_clientid,
6830 .get_clid_cred = nfs4_get_setclientid_cred,
6833 #if defined(CONFIG_NFS_V4_1)
6834 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6835 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6836 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6837 .recover_open = nfs41_open_expired,
6838 .recover_lock = nfs41_lock_expired,
6839 .establish_clid = nfs41_init_clientid,
6840 .get_clid_cred = nfs4_get_exchange_id_cred,
6842 #endif /* CONFIG_NFS_V4_1 */
6844 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6845 .sched_state_renewal = nfs4_proc_async_renew,
6846 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6847 .renew_lease = nfs4_proc_renew,
6850 #if defined(CONFIG_NFS_V4_1)
6851 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6852 .sched_state_renewal = nfs41_proc_async_sequence,
6853 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6854 .renew_lease = nfs4_proc_sequence,
6858 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6860 .call_sync = _nfs4_call_sync,
6861 .match_stateid = nfs4_match_stateid,
6862 .find_root_sec = nfs4_find_root_sec,
6863 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6864 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6865 .state_renewal_ops = &nfs40_state_renewal_ops,
6868 #if defined(CONFIG_NFS_V4_1)
6869 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6871 .call_sync = _nfs4_call_sync_session,
6872 .match_stateid = nfs41_match_stateid,
6873 .find_root_sec = nfs41_find_root_sec,
6874 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6875 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6876 .state_renewal_ops = &nfs41_state_renewal_ops,
6880 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6881 [0] = &nfs_v4_0_minor_ops,
6882 #if defined(CONFIG_NFS_V4_1)
6883 [1] = &nfs_v4_1_minor_ops,
6887 const struct inode_operations nfs4_dir_inode_operations = {
6888 .create = nfs_create,
6889 .lookup = nfs_lookup,
6890 .atomic_open = nfs_atomic_open,
6892 .unlink = nfs_unlink,
6893 .symlink = nfs_symlink,
6897 .rename = nfs_rename,
6898 .permission = nfs_permission,
6899 .getattr = nfs_getattr,
6900 .setattr = nfs_setattr,
6901 .getxattr = generic_getxattr,
6902 .setxattr = generic_setxattr,
6903 .listxattr = generic_listxattr,
6904 .removexattr = generic_removexattr,
6907 static const struct inode_operations nfs4_file_inode_operations = {
6908 .permission = nfs_permission,
6909 .getattr = nfs_getattr,
6910 .setattr = nfs_setattr,
6911 .getxattr = generic_getxattr,
6912 .setxattr = generic_setxattr,
6913 .listxattr = generic_listxattr,
6914 .removexattr = generic_removexattr,
6917 const struct nfs_rpc_ops nfs_v4_clientops = {
6918 .version = 4, /* protocol version */
6919 .dentry_ops = &nfs4_dentry_operations,
6920 .dir_inode_ops = &nfs4_dir_inode_operations,
6921 .file_inode_ops = &nfs4_file_inode_operations,
6922 .file_ops = &nfs4_file_operations,
6923 .getroot = nfs4_proc_get_root,
6924 .submount = nfs4_submount,
6925 .try_mount = nfs4_try_mount,
6926 .getattr = nfs4_proc_getattr,
6927 .setattr = nfs4_proc_setattr,
6928 .lookup = nfs4_proc_lookup,
6929 .access = nfs4_proc_access,
6930 .readlink = nfs4_proc_readlink,
6931 .create = nfs4_proc_create,
6932 .remove = nfs4_proc_remove,
6933 .unlink_setup = nfs4_proc_unlink_setup,
6934 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6935 .unlink_done = nfs4_proc_unlink_done,
6936 .rename = nfs4_proc_rename,
6937 .rename_setup = nfs4_proc_rename_setup,
6938 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6939 .rename_done = nfs4_proc_rename_done,
6940 .link = nfs4_proc_link,
6941 .symlink = nfs4_proc_symlink,
6942 .mkdir = nfs4_proc_mkdir,
6943 .rmdir = nfs4_proc_remove,
6944 .readdir = nfs4_proc_readdir,
6945 .mknod = nfs4_proc_mknod,
6946 .statfs = nfs4_proc_statfs,
6947 .fsinfo = nfs4_proc_fsinfo,
6948 .pathconf = nfs4_proc_pathconf,
6949 .set_capabilities = nfs4_server_capabilities,
6950 .decode_dirent = nfs4_decode_dirent,
6951 .read_setup = nfs4_proc_read_setup,
6952 .read_pageio_init = pnfs_pageio_init_read,
6953 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6954 .read_done = nfs4_read_done,
6955 .write_setup = nfs4_proc_write_setup,
6956 .write_pageio_init = pnfs_pageio_init_write,
6957 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6958 .write_done = nfs4_write_done,
6959 .commit_setup = nfs4_proc_commit_setup,
6960 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6961 .commit_done = nfs4_commit_done,
6962 .lock = nfs4_proc_lock,
6963 .clear_acl_cache = nfs4_zap_acl_attr,
6964 .close_context = nfs4_close_context,
6965 .open_context = nfs4_atomic_open,
6966 .have_delegation = nfs4_have_delegation,
6967 .return_delegation = nfs4_inode_return_delegation,
6968 .alloc_client = nfs4_alloc_client,
6969 .init_client = nfs4_init_client,
6970 .free_client = nfs4_free_client,
6971 .create_server = nfs4_create_server,
6972 .clone_server = nfs_clone_server,
6975 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6976 .prefix = XATTR_NAME_NFSV4_ACL,
6977 .list = nfs4_xattr_list_nfs4_acl,
6978 .get = nfs4_xattr_get_nfs4_acl,
6979 .set = nfs4_xattr_set_nfs4_acl,
6982 const struct xattr_handler *nfs4_xattr_handlers[] = {
6983 &nfs4_xattr_nfs4_acl_handler,