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/sunrpc/gss_api.h>
47 #include <linux/nfs.h>
48 #include <linux/nfs4.h>
49 #include <linux/nfs_fs.h>
50 #include <linux/nfs_page.h>
51 #include <linux/nfs_mount.h>
52 #include <linux/namei.h>
53 #include <linux/mount.h>
54 #include <linux/module.h>
55 #include <linux/nfs_idmap.h>
56 #include <linux/sunrpc/bc_xprt.h>
57 #include <linux/xattr.h>
58 #include <linux/utsname.h>
59 #include <linux/freezer.h>
62 #include "delegation.h"
69 #define NFSDBG_FACILITY NFSDBG_PROC
71 #define NFS4_POLL_RETRY_MIN (HZ/10)
72 #define NFS4_POLL_RETRY_MAX (15*HZ)
74 #define NFS4_MAX_LOOP_ON_RECOVER (10)
76 static unsigned short max_session_slots = NFS4_DEF_SLOT_TABLE_SIZE;
79 static int _nfs4_proc_open(struct nfs4_opendata *data);
80 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
81 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
82 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
83 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
84 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
85 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
86 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
87 struct nfs_fattr *fattr, struct iattr *sattr,
88 struct nfs4_state *state);
89 #ifdef CONFIG_NFS_V4_1
90 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
91 static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
93 /* Prevent leaks of NFSv4 errors into userland */
94 static int nfs4_map_errors(int err)
99 case -NFS4ERR_RESOURCE:
101 case -NFS4ERR_WRONGSEC:
103 case -NFS4ERR_BADOWNER:
104 case -NFS4ERR_BADNAME:
107 dprintk("%s could not handle NFSv4 error %d\n",
115 * This is our standard bitmap for GETATTR requests.
117 const u32 nfs4_fattr_bitmap[2] = {
119 | FATTR4_WORD0_CHANGE
122 | FATTR4_WORD0_FILEID,
124 | FATTR4_WORD1_NUMLINKS
126 | FATTR4_WORD1_OWNER_GROUP
127 | FATTR4_WORD1_RAWDEV
128 | FATTR4_WORD1_SPACE_USED
129 | FATTR4_WORD1_TIME_ACCESS
130 | FATTR4_WORD1_TIME_METADATA
131 | FATTR4_WORD1_TIME_MODIFY
134 const u32 nfs4_statfs_bitmap[2] = {
135 FATTR4_WORD0_FILES_AVAIL
136 | FATTR4_WORD0_FILES_FREE
137 | FATTR4_WORD0_FILES_TOTAL,
138 FATTR4_WORD1_SPACE_AVAIL
139 | FATTR4_WORD1_SPACE_FREE
140 | FATTR4_WORD1_SPACE_TOTAL
143 const u32 nfs4_pathconf_bitmap[2] = {
145 | FATTR4_WORD0_MAXNAME,
149 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
150 | FATTR4_WORD0_MAXREAD
151 | FATTR4_WORD0_MAXWRITE
152 | FATTR4_WORD0_LEASE_TIME,
153 FATTR4_WORD1_TIME_DELTA
154 | FATTR4_WORD1_FS_LAYOUT_TYPES,
155 FATTR4_WORD2_LAYOUT_BLKSIZE
158 const u32 nfs4_fs_locations_bitmap[2] = {
160 | FATTR4_WORD0_CHANGE
163 | FATTR4_WORD0_FILEID
164 | FATTR4_WORD0_FS_LOCATIONS,
166 | FATTR4_WORD1_NUMLINKS
168 | FATTR4_WORD1_OWNER_GROUP
169 | FATTR4_WORD1_RAWDEV
170 | FATTR4_WORD1_SPACE_USED
171 | FATTR4_WORD1_TIME_ACCESS
172 | FATTR4_WORD1_TIME_METADATA
173 | FATTR4_WORD1_TIME_MODIFY
174 | FATTR4_WORD1_MOUNTED_ON_FILEID
177 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
178 struct nfs4_readdir_arg *readdir)
182 BUG_ON(readdir->count < 80);
184 readdir->cookie = cookie;
185 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
190 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
195 * NFSv4 servers do not return entries for '.' and '..'
196 * Therefore, we fake these entries here. We let '.'
197 * have cookie 0 and '..' have cookie 1. Note that
198 * when talking to the server, we always send cookie 0
201 start = p = kmap_atomic(*readdir->pages);
204 *p++ = xdr_one; /* next */
205 *p++ = xdr_zero; /* cookie, first word */
206 *p++ = xdr_one; /* cookie, second word */
207 *p++ = xdr_one; /* entry len */
208 memcpy(p, ".\0\0\0", 4); /* entry */
210 *p++ = xdr_one; /* bitmap length */
211 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
212 *p++ = htonl(8); /* attribute buffer length */
213 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
216 *p++ = xdr_one; /* next */
217 *p++ = xdr_zero; /* cookie, first word */
218 *p++ = xdr_two; /* cookie, second word */
219 *p++ = xdr_two; /* entry len */
220 memcpy(p, "..\0\0", 4); /* entry */
222 *p++ = xdr_one; /* bitmap length */
223 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
224 *p++ = htonl(8); /* attribute buffer length */
225 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
227 readdir->pgbase = (char *)p - (char *)start;
228 readdir->count -= readdir->pgbase;
229 kunmap_atomic(start);
232 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
238 res = wait_on_bit(&clp->cl_state, NFS4CLNT_MANAGER_RUNNING,
239 nfs_wait_bit_killable, TASK_KILLABLE);
243 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
250 *timeout = NFS4_POLL_RETRY_MIN;
251 if (*timeout > NFS4_POLL_RETRY_MAX)
252 *timeout = NFS4_POLL_RETRY_MAX;
253 freezable_schedule_timeout_killable(*timeout);
254 if (fatal_signal_pending(current))
260 /* This is the error handling routine for processes that are allowed
263 static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
265 struct nfs_client *clp = server->nfs_client;
266 struct nfs4_state *state = exception->state;
267 struct inode *inode = exception->inode;
270 exception->retry = 0;
274 case -NFS4ERR_OPENMODE:
275 if (inode && nfs_have_delegation(inode, FMODE_READ)) {
276 nfs_inode_return_delegation(inode);
277 exception->retry = 1;
282 nfs4_schedule_stateid_recovery(server, state);
283 goto wait_on_recovery;
284 case -NFS4ERR_DELEG_REVOKED:
285 case -NFS4ERR_ADMIN_REVOKED:
286 case -NFS4ERR_BAD_STATEID:
289 nfs_remove_bad_delegation(state->inode);
290 nfs4_schedule_stateid_recovery(server, state);
291 goto wait_on_recovery;
292 case -NFS4ERR_EXPIRED:
294 nfs4_schedule_stateid_recovery(server, state);
295 case -NFS4ERR_STALE_STATEID:
296 case -NFS4ERR_STALE_CLIENTID:
297 nfs4_schedule_lease_recovery(clp);
298 goto wait_on_recovery;
299 #if defined(CONFIG_NFS_V4_1)
300 case -NFS4ERR_BADSESSION:
301 case -NFS4ERR_BADSLOT:
302 case -NFS4ERR_BAD_HIGH_SLOT:
303 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
304 case -NFS4ERR_DEADSESSION:
305 case -NFS4ERR_SEQ_FALSE_RETRY:
306 case -NFS4ERR_SEQ_MISORDERED:
307 dprintk("%s ERROR: %d Reset session\n", __func__,
309 nfs4_schedule_session_recovery(clp->cl_session);
310 exception->retry = 1;
312 #endif /* defined(CONFIG_NFS_V4_1) */
313 case -NFS4ERR_FILE_OPEN:
314 if (exception->timeout > HZ) {
315 /* We have retried a decent amount, time to
324 ret = nfs4_delay(server->client, &exception->timeout);
327 case -NFS4ERR_RETRY_UNCACHED_REP:
328 case -NFS4ERR_OLD_STATEID:
329 exception->retry = 1;
331 case -NFS4ERR_BADOWNER:
332 /* The following works around a Linux server bug! */
333 case -NFS4ERR_BADNAME:
334 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
335 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
336 exception->retry = 1;
337 printk(KERN_WARNING "NFS: v4 server %s "
338 "does not accept raw "
340 "Reenabling the idmapper.\n",
341 server->nfs_client->cl_hostname);
344 /* We failed to handle the error */
345 return nfs4_map_errors(ret);
347 ret = nfs4_wait_clnt_recover(clp);
349 exception->retry = 1;
354 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
356 spin_lock(&clp->cl_lock);
357 if (time_before(clp->cl_last_renewal,timestamp))
358 clp->cl_last_renewal = timestamp;
359 spin_unlock(&clp->cl_lock);
362 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
364 do_renew_lease(server->nfs_client, timestamp);
367 #if defined(CONFIG_NFS_V4_1)
370 * nfs4_free_slot - free a slot and efficiently update slot table.
372 * freeing a slot is trivially done by clearing its respective bit
374 * If the freed slotid equals highest_used_slotid we want to update it
375 * so that the server would be able to size down the slot table if needed,
376 * otherwise we know that the highest_used_slotid is still in use.
377 * When updating highest_used_slotid there may be "holes" in the bitmap
378 * so we need to scan down from highest_used_slotid to 0 looking for the now
379 * highest slotid in use.
380 * If none found, highest_used_slotid is set to NFS4_NO_SLOT.
382 * Must be called while holding tbl->slot_tbl_lock
385 nfs4_free_slot(struct nfs4_slot_table *tbl, u32 slotid)
387 BUG_ON(slotid >= NFS4_MAX_SLOT_TABLE);
388 /* clear used bit in bitmap */
389 __clear_bit(slotid, tbl->used_slots);
391 /* update highest_used_slotid when it is freed */
392 if (slotid == tbl->highest_used_slotid) {
393 slotid = find_last_bit(tbl->used_slots, tbl->max_slots);
394 if (slotid < tbl->max_slots)
395 tbl->highest_used_slotid = slotid;
397 tbl->highest_used_slotid = NFS4_NO_SLOT;
399 dprintk("%s: slotid %u highest_used_slotid %d\n", __func__,
400 slotid, tbl->highest_used_slotid);
403 bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
405 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
410 * Signal state manager thread if session fore channel is drained
412 static void nfs4_check_drain_fc_complete(struct nfs4_session *ses)
414 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state)) {
415 rpc_wake_up_first(&ses->fc_slot_table.slot_tbl_waitq,
416 nfs4_set_task_privileged, NULL);
420 if (ses->fc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
423 dprintk("%s COMPLETE: Session Fore Channel Drained\n", __func__);
424 complete(&ses->fc_slot_table.complete);
428 * Signal state manager thread if session back channel is drained
430 void nfs4_check_drain_bc_complete(struct nfs4_session *ses)
432 if (!test_bit(NFS4_SESSION_DRAINING, &ses->session_state) ||
433 ses->bc_slot_table.highest_used_slotid != NFS4_NO_SLOT)
435 dprintk("%s COMPLETE: Session Back Channel Drained\n", __func__);
436 complete(&ses->bc_slot_table.complete);
439 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
441 struct nfs4_slot_table *tbl;
443 tbl = &res->sr_session->fc_slot_table;
445 /* just wake up the next guy waiting since
446 * we may have not consumed a slot after all */
447 dprintk("%s: No slot\n", __func__);
451 spin_lock(&tbl->slot_tbl_lock);
452 nfs4_free_slot(tbl, res->sr_slot - tbl->slots);
453 nfs4_check_drain_fc_complete(res->sr_session);
454 spin_unlock(&tbl->slot_tbl_lock);
458 static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
460 unsigned long timestamp;
461 struct nfs_client *clp;
464 * sr_status remains 1 if an RPC level error occurred. The server
465 * may or may not have processed the sequence operation..
466 * Proceed as if the server received and processed the sequence
469 if (res->sr_status == 1)
470 res->sr_status = NFS_OK;
472 /* don't increment the sequence number if the task wasn't sent */
473 if (!RPC_WAS_SENT(task))
476 /* Check the SEQUENCE operation status */
477 switch (res->sr_status) {
479 /* Update the slot's sequence and clientid lease timer */
480 ++res->sr_slot->seq_nr;
481 timestamp = res->sr_renewal_time;
482 clp = res->sr_session->clp;
483 do_renew_lease(clp, timestamp);
484 /* Check sequence flags */
485 if (res->sr_status_flags != 0)
486 nfs4_schedule_lease_recovery(clp);
489 /* The server detected a resend of the RPC call and
490 * returned NFS4ERR_DELAY as per Section 2.10.6.2
493 dprintk("%s: slot=%td seq=%d: Operation in progress\n",
495 res->sr_slot - res->sr_session->fc_slot_table.slots,
496 res->sr_slot->seq_nr);
499 /* Just update the slot sequence no. */
500 ++res->sr_slot->seq_nr;
503 /* The session may be reset by one of the error handlers. */
504 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
505 nfs41_sequence_free_slot(res);
508 if (!rpc_restart_call(task))
510 rpc_delay(task, NFS4_POLL_RETRY_MAX);
514 static int nfs4_sequence_done(struct rpc_task *task,
515 struct nfs4_sequence_res *res)
517 if (res->sr_session == NULL)
519 return nfs41_sequence_done(task, res);
523 * nfs4_find_slot - efficiently look for a free slot
525 * nfs4_find_slot looks for an unset bit in the used_slots bitmap.
526 * If found, we mark the slot as used, update the highest_used_slotid,
527 * and respectively set up the sequence operation args.
528 * The slot number is returned if found, or NFS4_NO_SLOT otherwise.
530 * Note: must be called with under the slot_tbl_lock.
533 nfs4_find_slot(struct nfs4_slot_table *tbl)
536 u32 ret_id = NFS4_NO_SLOT;
538 dprintk("--> %s used_slots=%04lx highest_used=%u max_slots=%u\n",
539 __func__, tbl->used_slots[0], tbl->highest_used_slotid,
541 slotid = find_first_zero_bit(tbl->used_slots, tbl->max_slots);
542 if (slotid >= tbl->max_slots)
544 __set_bit(slotid, tbl->used_slots);
545 if (slotid > tbl->highest_used_slotid ||
546 tbl->highest_used_slotid == NFS4_NO_SLOT)
547 tbl->highest_used_slotid = slotid;
550 dprintk("<-- %s used_slots=%04lx highest_used=%d slotid=%d \n",
551 __func__, tbl->used_slots[0], tbl->highest_used_slotid, ret_id);
555 static void nfs41_init_sequence(struct nfs4_sequence_args *args,
556 struct nfs4_sequence_res *res, int cache_reply)
558 args->sa_session = NULL;
559 args->sa_cache_this = 0;
561 args->sa_cache_this = 1;
562 res->sr_session = NULL;
566 int nfs41_setup_sequence(struct nfs4_session *session,
567 struct nfs4_sequence_args *args,
568 struct nfs4_sequence_res *res,
569 struct rpc_task *task)
571 struct nfs4_slot *slot;
572 struct nfs4_slot_table *tbl;
575 dprintk("--> %s\n", __func__);
576 /* slot already allocated? */
577 if (res->sr_slot != NULL)
580 tbl = &session->fc_slot_table;
582 spin_lock(&tbl->slot_tbl_lock);
583 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
584 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
585 /* The state manager will wait until the slot table is empty */
586 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
587 spin_unlock(&tbl->slot_tbl_lock);
588 dprintk("%s session is draining\n", __func__);
592 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
593 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
594 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
595 spin_unlock(&tbl->slot_tbl_lock);
596 dprintk("%s enforce FIFO order\n", __func__);
600 slotid = nfs4_find_slot(tbl);
601 if (slotid == NFS4_NO_SLOT) {
602 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
603 spin_unlock(&tbl->slot_tbl_lock);
604 dprintk("<-- %s: no free slots\n", __func__);
607 spin_unlock(&tbl->slot_tbl_lock);
609 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
610 slot = tbl->slots + slotid;
611 args->sa_session = session;
612 args->sa_slotid = slotid;
614 dprintk("<-- %s slotid=%d seqid=%d\n", __func__, slotid, slot->seq_nr);
616 res->sr_session = session;
618 res->sr_renewal_time = jiffies;
619 res->sr_status_flags = 0;
621 * sr_status is only set in decode_sequence, and so will remain
622 * set to 1 if an rpc level failure occurs.
627 EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
629 int nfs4_setup_sequence(const struct nfs_server *server,
630 struct nfs4_sequence_args *args,
631 struct nfs4_sequence_res *res,
632 struct rpc_task *task)
634 struct nfs4_session *session = nfs4_get_session(server);
640 dprintk("--> %s clp %p session %p sr_slot %td\n",
641 __func__, session->clp, session, res->sr_slot ?
642 res->sr_slot - session->fc_slot_table.slots : -1);
644 ret = nfs41_setup_sequence(session, args, res, task);
646 dprintk("<-- %s status=%d\n", __func__, ret);
650 struct nfs41_call_sync_data {
651 const struct nfs_server *seq_server;
652 struct nfs4_sequence_args *seq_args;
653 struct nfs4_sequence_res *seq_res;
656 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
658 struct nfs41_call_sync_data *data = calldata;
660 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
662 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
663 data->seq_res, task))
665 rpc_call_start(task);
668 static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
670 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
671 nfs41_call_sync_prepare(task, calldata);
674 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
676 struct nfs41_call_sync_data *data = calldata;
678 nfs41_sequence_done(task, data->seq_res);
681 static const struct rpc_call_ops nfs41_call_sync_ops = {
682 .rpc_call_prepare = nfs41_call_sync_prepare,
683 .rpc_call_done = nfs41_call_sync_done,
686 static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
687 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
688 .rpc_call_done = nfs41_call_sync_done,
691 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
692 struct nfs_server *server,
693 struct rpc_message *msg,
694 struct nfs4_sequence_args *args,
695 struct nfs4_sequence_res *res,
699 struct rpc_task *task;
700 struct nfs41_call_sync_data data = {
701 .seq_server = server,
705 struct rpc_task_setup task_setup = {
708 .callback_ops = &nfs41_call_sync_ops,
709 .callback_data = &data
713 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
714 task = rpc_run_task(&task_setup);
718 ret = task->tk_status;
724 int _nfs4_call_sync_session(struct rpc_clnt *clnt,
725 struct nfs_server *server,
726 struct rpc_message *msg,
727 struct nfs4_sequence_args *args,
728 struct nfs4_sequence_res *res,
731 nfs41_init_sequence(args, res, cache_reply);
732 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
737 void nfs41_init_sequence(struct nfs4_sequence_args *args,
738 struct nfs4_sequence_res *res, int cache_reply)
742 static int nfs4_sequence_done(struct rpc_task *task,
743 struct nfs4_sequence_res *res)
747 #endif /* CONFIG_NFS_V4_1 */
749 int _nfs4_call_sync(struct rpc_clnt *clnt,
750 struct nfs_server *server,
751 struct rpc_message *msg,
752 struct nfs4_sequence_args *args,
753 struct nfs4_sequence_res *res,
756 nfs41_init_sequence(args, res, cache_reply);
757 return rpc_call_sync(clnt, msg, 0);
761 int nfs4_call_sync(struct rpc_clnt *clnt,
762 struct nfs_server *server,
763 struct rpc_message *msg,
764 struct nfs4_sequence_args *args,
765 struct nfs4_sequence_res *res,
768 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
769 args, res, cache_reply);
772 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
774 struct nfs_inode *nfsi = NFS_I(dir);
776 spin_lock(&dir->i_lock);
777 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
778 if (!cinfo->atomic || cinfo->before != dir->i_version)
779 nfs_force_lookup_revalidate(dir);
780 dir->i_version = cinfo->after;
781 spin_unlock(&dir->i_lock);
784 struct nfs4_opendata {
786 struct nfs_openargs o_arg;
787 struct nfs_openres o_res;
788 struct nfs_open_confirmargs c_arg;
789 struct nfs_open_confirmres c_res;
790 struct nfs4_string owner_name;
791 struct nfs4_string group_name;
792 struct nfs_fattr f_attr;
794 struct dentry *dentry;
795 struct nfs4_state_owner *owner;
796 struct nfs4_state *state;
798 unsigned long timestamp;
799 unsigned int rpc_done : 1;
805 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
807 p->o_res.f_attr = &p->f_attr;
808 p->o_res.seqid = p->o_arg.seqid;
809 p->c_res.seqid = p->c_arg.seqid;
810 p->o_res.server = p->o_arg.server;
811 nfs_fattr_init(&p->f_attr);
812 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
815 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
816 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
817 const struct iattr *attrs,
820 struct dentry *parent = dget_parent(dentry);
821 struct inode *dir = parent->d_inode;
822 struct nfs_server *server = NFS_SERVER(dir);
823 struct nfs4_opendata *p;
825 p = kzalloc(sizeof(*p), gfp_mask);
828 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
829 if (p->o_arg.seqid == NULL)
831 nfs_sb_active(dentry->d_sb);
832 p->dentry = dget(dentry);
835 atomic_inc(&sp->so_count);
836 p->o_arg.fh = NFS_FH(dir);
837 p->o_arg.open_flags = flags;
838 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
839 p->o_arg.clientid = server->nfs_client->cl_clientid;
840 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
841 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
842 p->o_arg.name = &dentry->d_name;
843 p->o_arg.server = server;
844 p->o_arg.bitmask = server->attr_bitmask;
845 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
846 if (attrs != NULL && attrs->ia_valid != 0) {
849 p->o_arg.u.attrs = &p->attrs;
850 memcpy(&p->attrs, attrs, sizeof(p->attrs));
853 verf[1] = current->pid;
854 memcpy(p->o_arg.u.verifier.data, verf,
855 sizeof(p->o_arg.u.verifier.data));
857 p->c_arg.fh = &p->o_res.fh;
858 p->c_arg.stateid = &p->o_res.stateid;
859 p->c_arg.seqid = p->o_arg.seqid;
860 nfs4_init_opendata_res(p);
870 static void nfs4_opendata_free(struct kref *kref)
872 struct nfs4_opendata *p = container_of(kref,
873 struct nfs4_opendata, kref);
874 struct super_block *sb = p->dentry->d_sb;
876 nfs_free_seqid(p->o_arg.seqid);
877 if (p->state != NULL)
878 nfs4_put_open_state(p->state);
879 nfs4_put_state_owner(p->owner);
883 nfs_fattr_free_names(&p->f_attr);
887 static void nfs4_opendata_put(struct nfs4_opendata *p)
890 kref_put(&p->kref, nfs4_opendata_free);
893 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
897 ret = rpc_wait_for_completion_task(task);
901 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
905 if (open_mode & (O_EXCL|O_TRUNC))
907 switch (mode & (FMODE_READ|FMODE_WRITE)) {
909 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
910 && state->n_rdonly != 0;
913 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
914 && state->n_wronly != 0;
916 case FMODE_READ|FMODE_WRITE:
917 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
918 && state->n_rdwr != 0;
924 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
926 if (delegation == NULL)
928 if ((delegation->type & fmode) != fmode)
930 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
932 nfs_mark_delegation_referenced(delegation);
936 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
945 case FMODE_READ|FMODE_WRITE:
948 nfs4_state_set_mode_locked(state, state->state | fmode);
951 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
953 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
954 nfs4_stateid_copy(&state->stateid, stateid);
955 nfs4_stateid_copy(&state->open_stateid, stateid);
958 set_bit(NFS_O_RDONLY_STATE, &state->flags);
961 set_bit(NFS_O_WRONLY_STATE, &state->flags);
963 case FMODE_READ|FMODE_WRITE:
964 set_bit(NFS_O_RDWR_STATE, &state->flags);
968 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
970 write_seqlock(&state->seqlock);
971 nfs_set_open_stateid_locked(state, stateid, fmode);
972 write_sequnlock(&state->seqlock);
975 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
978 * Protect the call to nfs4_state_set_mode_locked and
979 * serialise the stateid update
981 write_seqlock(&state->seqlock);
982 if (deleg_stateid != NULL) {
983 nfs4_stateid_copy(&state->stateid, deleg_stateid);
984 set_bit(NFS_DELEGATED_STATE, &state->flags);
986 if (open_stateid != NULL)
987 nfs_set_open_stateid_locked(state, open_stateid, fmode);
988 write_sequnlock(&state->seqlock);
989 spin_lock(&state->owner->so_lock);
990 update_open_stateflags(state, fmode);
991 spin_unlock(&state->owner->so_lock);
994 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
996 struct nfs_inode *nfsi = NFS_I(state->inode);
997 struct nfs_delegation *deleg_cur;
1000 fmode &= (FMODE_READ|FMODE_WRITE);
1003 deleg_cur = rcu_dereference(nfsi->delegation);
1004 if (deleg_cur == NULL)
1007 spin_lock(&deleg_cur->lock);
1008 if (nfsi->delegation != deleg_cur ||
1009 (deleg_cur->type & fmode) != fmode)
1010 goto no_delegation_unlock;
1012 if (delegation == NULL)
1013 delegation = &deleg_cur->stateid;
1014 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1015 goto no_delegation_unlock;
1017 nfs_mark_delegation_referenced(deleg_cur);
1018 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
1020 no_delegation_unlock:
1021 spin_unlock(&deleg_cur->lock);
1025 if (!ret && open_stateid != NULL) {
1026 __update_open_stateid(state, open_stateid, NULL, fmode);
1034 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1036 struct nfs_delegation *delegation;
1039 delegation = rcu_dereference(NFS_I(inode)->delegation);
1040 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1045 nfs_inode_return_delegation(inode);
1048 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1050 struct nfs4_state *state = opendata->state;
1051 struct nfs_inode *nfsi = NFS_I(state->inode);
1052 struct nfs_delegation *delegation;
1053 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
1054 fmode_t fmode = opendata->o_arg.fmode;
1055 nfs4_stateid stateid;
1059 if (can_open_cached(state, fmode, open_mode)) {
1060 spin_lock(&state->owner->so_lock);
1061 if (can_open_cached(state, fmode, open_mode)) {
1062 update_open_stateflags(state, fmode);
1063 spin_unlock(&state->owner->so_lock);
1064 goto out_return_state;
1066 spin_unlock(&state->owner->so_lock);
1069 delegation = rcu_dereference(nfsi->delegation);
1070 if (!can_open_delegated(delegation, fmode)) {
1074 /* Save the delegation */
1075 nfs4_stateid_copy(&stateid, &delegation->stateid);
1077 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1082 /* Try to update the stateid using the delegation */
1083 if (update_open_stateid(state, NULL, &stateid, fmode))
1084 goto out_return_state;
1087 return ERR_PTR(ret);
1089 atomic_inc(&state->count);
1093 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1095 struct inode *inode;
1096 struct nfs4_state *state = NULL;
1097 struct nfs_delegation *delegation;
1100 if (!data->rpc_done) {
1101 state = nfs4_try_open_cached(data);
1106 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1108 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1109 ret = PTR_ERR(inode);
1113 state = nfs4_get_open_state(inode, data->owner);
1116 if (data->o_res.delegation_type != 0) {
1117 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
1118 int delegation_flags = 0;
1121 delegation = rcu_dereference(NFS_I(inode)->delegation);
1123 delegation_flags = delegation->flags;
1125 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1126 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1127 "returning a delegation for "
1128 "OPEN(CLAIM_DELEGATE_CUR)\n",
1130 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1131 nfs_inode_set_delegation(state->inode,
1132 data->owner->so_cred,
1135 nfs_inode_reclaim_delegation(state->inode,
1136 data->owner->so_cred,
1140 update_open_stateid(state, &data->o_res.stateid, NULL,
1148 return ERR_PTR(ret);
1151 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1153 struct nfs_inode *nfsi = NFS_I(state->inode);
1154 struct nfs_open_context *ctx;
1156 spin_lock(&state->inode->i_lock);
1157 list_for_each_entry(ctx, &nfsi->open_files, list) {
1158 if (ctx->state != state)
1160 get_nfs_open_context(ctx);
1161 spin_unlock(&state->inode->i_lock);
1164 spin_unlock(&state->inode->i_lock);
1165 return ERR_PTR(-ENOENT);
1168 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1170 struct nfs4_opendata *opendata;
1172 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
1173 if (opendata == NULL)
1174 return ERR_PTR(-ENOMEM);
1175 opendata->state = state;
1176 atomic_inc(&state->count);
1180 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
1182 struct nfs4_state *newstate;
1185 opendata->o_arg.open_flags = 0;
1186 opendata->o_arg.fmode = fmode;
1187 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1188 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1189 nfs4_init_opendata_res(opendata);
1190 ret = _nfs4_recover_proc_open(opendata);
1193 newstate = nfs4_opendata_to_nfs4_state(opendata);
1194 if (IS_ERR(newstate))
1195 return PTR_ERR(newstate);
1196 nfs4_close_state(newstate, fmode);
1201 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1203 struct nfs4_state *newstate;
1206 /* memory barrier prior to reading state->n_* */
1207 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1209 if (state->n_rdwr != 0) {
1210 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1211 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
1214 if (newstate != state)
1217 if (state->n_wronly != 0) {
1218 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1219 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
1222 if (newstate != state)
1225 if (state->n_rdonly != 0) {
1226 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1227 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
1230 if (newstate != state)
1234 * We may have performed cached opens for all three recoveries.
1235 * Check if we need to update the current stateid.
1237 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1238 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1239 write_seqlock(&state->seqlock);
1240 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1241 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1242 write_sequnlock(&state->seqlock);
1249 * reclaim state on the server after a reboot.
1251 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1253 struct nfs_delegation *delegation;
1254 struct nfs4_opendata *opendata;
1255 fmode_t delegation_type = 0;
1258 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1259 if (IS_ERR(opendata))
1260 return PTR_ERR(opendata);
1261 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1262 opendata->o_arg.fh = NFS_FH(state->inode);
1264 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1265 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1266 delegation_type = delegation->type;
1268 opendata->o_arg.u.delegation_type = delegation_type;
1269 status = nfs4_open_recover(opendata, state);
1270 nfs4_opendata_put(opendata);
1274 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1276 struct nfs_server *server = NFS_SERVER(state->inode);
1277 struct nfs4_exception exception = { };
1280 err = _nfs4_do_open_reclaim(ctx, state);
1281 if (err != -NFS4ERR_DELAY)
1283 nfs4_handle_exception(server, err, &exception);
1284 } while (exception.retry);
1288 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1290 struct nfs_open_context *ctx;
1293 ctx = nfs4_state_find_open_context(state);
1295 return PTR_ERR(ctx);
1296 ret = nfs4_do_open_reclaim(ctx, state);
1297 put_nfs_open_context(ctx);
1301 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1303 struct nfs4_opendata *opendata;
1306 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1307 if (IS_ERR(opendata))
1308 return PTR_ERR(opendata);
1309 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
1310 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1311 ret = nfs4_open_recover(opendata, state);
1312 nfs4_opendata_put(opendata);
1316 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1318 struct nfs4_exception exception = { };
1319 struct nfs_server *server = NFS_SERVER(state->inode);
1322 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1328 case -NFS4ERR_BADSESSION:
1329 case -NFS4ERR_BADSLOT:
1330 case -NFS4ERR_BAD_HIGH_SLOT:
1331 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1332 case -NFS4ERR_DEADSESSION:
1333 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
1335 case -NFS4ERR_STALE_CLIENTID:
1336 case -NFS4ERR_STALE_STATEID:
1337 case -NFS4ERR_EXPIRED:
1338 /* Don't recall a delegation if it was lost */
1339 nfs4_schedule_lease_recovery(server->nfs_client);
1343 * The show must go on: exit, but mark the
1344 * stateid as needing recovery.
1346 case -NFS4ERR_DELEG_REVOKED:
1347 case -NFS4ERR_ADMIN_REVOKED:
1348 case -NFS4ERR_BAD_STATEID:
1349 nfs_inode_find_state_and_recover(state->inode,
1351 nfs4_schedule_stateid_recovery(server, state);
1354 * User RPCSEC_GSS context has expired.
1355 * We cannot recover this stateid now, so
1356 * skip it and allow recovery thread to
1363 err = nfs4_handle_exception(server, err, &exception);
1364 } while (exception.retry);
1369 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1371 struct nfs4_opendata *data = calldata;
1373 data->rpc_status = task->tk_status;
1374 if (data->rpc_status == 0) {
1375 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1376 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1377 renew_lease(data->o_res.server, data->timestamp);
1382 static void nfs4_open_confirm_release(void *calldata)
1384 struct nfs4_opendata *data = calldata;
1385 struct nfs4_state *state = NULL;
1387 /* If this request hasn't been cancelled, do nothing */
1388 if (data->cancelled == 0)
1390 /* In case of error, no cleanup! */
1391 if (!data->rpc_done)
1393 state = nfs4_opendata_to_nfs4_state(data);
1395 nfs4_close_state(state, data->o_arg.fmode);
1397 nfs4_opendata_put(data);
1400 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1401 .rpc_call_done = nfs4_open_confirm_done,
1402 .rpc_release = nfs4_open_confirm_release,
1406 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1408 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1410 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1411 struct rpc_task *task;
1412 struct rpc_message msg = {
1413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1414 .rpc_argp = &data->c_arg,
1415 .rpc_resp = &data->c_res,
1416 .rpc_cred = data->owner->so_cred,
1418 struct rpc_task_setup task_setup_data = {
1419 .rpc_client = server->client,
1420 .rpc_message = &msg,
1421 .callback_ops = &nfs4_open_confirm_ops,
1422 .callback_data = data,
1423 .workqueue = nfsiod_workqueue,
1424 .flags = RPC_TASK_ASYNC,
1428 kref_get(&data->kref);
1430 data->rpc_status = 0;
1431 data->timestamp = jiffies;
1432 task = rpc_run_task(&task_setup_data);
1434 return PTR_ERR(task);
1435 status = nfs4_wait_for_completion_rpc_task(task);
1437 data->cancelled = 1;
1440 status = data->rpc_status;
1445 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1447 struct nfs4_opendata *data = calldata;
1448 struct nfs4_state_owner *sp = data->owner;
1450 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1453 * Check if we still need to send an OPEN call, or if we can use
1454 * a delegation instead.
1456 if (data->state != NULL) {
1457 struct nfs_delegation *delegation;
1459 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
1462 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
1463 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1464 can_open_delegated(delegation, data->o_arg.fmode))
1465 goto unlock_no_action;
1468 /* Update client id. */
1469 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
1470 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
1471 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
1472 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1474 data->timestamp = jiffies;
1475 if (nfs4_setup_sequence(data->o_arg.server,
1476 &data->o_arg.seq_args,
1477 &data->o_res.seq_res, task))
1479 rpc_call_start(task);
1484 task->tk_action = NULL;
1488 static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1490 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1491 nfs4_open_prepare(task, calldata);
1494 static void nfs4_open_done(struct rpc_task *task, void *calldata)
1496 struct nfs4_opendata *data = calldata;
1498 data->rpc_status = task->tk_status;
1500 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1503 if (task->tk_status == 0) {
1504 switch (data->o_res.f_attr->mode & S_IFMT) {
1508 data->rpc_status = -ELOOP;
1511 data->rpc_status = -EISDIR;
1514 data->rpc_status = -ENOTDIR;
1516 renew_lease(data->o_res.server, data->timestamp);
1517 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1518 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1523 static void nfs4_open_release(void *calldata)
1525 struct nfs4_opendata *data = calldata;
1526 struct nfs4_state *state = NULL;
1528 /* If this request hasn't been cancelled, do nothing */
1529 if (data->cancelled == 0)
1531 /* In case of error, no cleanup! */
1532 if (data->rpc_status != 0 || !data->rpc_done)
1534 /* In case we need an open_confirm, no cleanup! */
1535 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1537 state = nfs4_opendata_to_nfs4_state(data);
1539 nfs4_close_state(state, data->o_arg.fmode);
1541 nfs4_opendata_put(data);
1544 static const struct rpc_call_ops nfs4_open_ops = {
1545 .rpc_call_prepare = nfs4_open_prepare,
1546 .rpc_call_done = nfs4_open_done,
1547 .rpc_release = nfs4_open_release,
1550 static const struct rpc_call_ops nfs4_recover_open_ops = {
1551 .rpc_call_prepare = nfs4_recover_open_prepare,
1552 .rpc_call_done = nfs4_open_done,
1553 .rpc_release = nfs4_open_release,
1556 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
1558 struct inode *dir = data->dir->d_inode;
1559 struct nfs_server *server = NFS_SERVER(dir);
1560 struct nfs_openargs *o_arg = &data->o_arg;
1561 struct nfs_openres *o_res = &data->o_res;
1562 struct rpc_task *task;
1563 struct rpc_message msg = {
1564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1567 .rpc_cred = data->owner->so_cred,
1569 struct rpc_task_setup task_setup_data = {
1570 .rpc_client = server->client,
1571 .rpc_message = &msg,
1572 .callback_ops = &nfs4_open_ops,
1573 .callback_data = data,
1574 .workqueue = nfsiod_workqueue,
1575 .flags = RPC_TASK_ASYNC,
1579 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
1580 kref_get(&data->kref);
1582 data->rpc_status = 0;
1583 data->cancelled = 0;
1585 task_setup_data.callback_ops = &nfs4_recover_open_ops;
1586 task = rpc_run_task(&task_setup_data);
1588 return PTR_ERR(task);
1589 status = nfs4_wait_for_completion_rpc_task(task);
1591 data->cancelled = 1;
1594 status = data->rpc_status;
1600 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1602 struct inode *dir = data->dir->d_inode;
1603 struct nfs_openres *o_res = &data->o_res;
1606 status = nfs4_run_open_task(data, 1);
1607 if (status != 0 || !data->rpc_done)
1610 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1612 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1613 status = _nfs4_proc_open_confirm(data);
1622 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1624 static int _nfs4_proc_open(struct nfs4_opendata *data)
1626 struct inode *dir = data->dir->d_inode;
1627 struct nfs_server *server = NFS_SERVER(dir);
1628 struct nfs_openargs *o_arg = &data->o_arg;
1629 struct nfs_openres *o_res = &data->o_res;
1632 status = nfs4_run_open_task(data, 0);
1633 if (!data->rpc_done)
1636 if (status == -NFS4ERR_BADNAME &&
1637 !(o_arg->open_flags & O_CREAT))
1642 nfs_fattr_map_and_free_names(server, &data->f_attr);
1644 if (o_arg->open_flags & O_CREAT)
1645 update_changeattr(dir, &o_res->cinfo);
1646 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1647 server->caps &= ~NFS_CAP_POSIX_LOCK;
1648 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1649 status = _nfs4_proc_open_confirm(data);
1653 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1654 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1658 static int nfs4_client_recover_expired_lease(struct nfs_client *clp)
1663 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
1664 ret = nfs4_wait_clnt_recover(clp);
1667 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1668 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1670 nfs4_schedule_state_manager(clp);
1676 static int nfs4_recover_expired_lease(struct nfs_server *server)
1678 return nfs4_client_recover_expired_lease(server->nfs_client);
1683 * reclaim state on the server after a network partition.
1684 * Assumes caller holds the appropriate lock
1686 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1688 struct nfs4_opendata *opendata;
1691 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1692 if (IS_ERR(opendata))
1693 return PTR_ERR(opendata);
1694 ret = nfs4_open_recover(opendata, state);
1696 d_drop(ctx->dentry);
1697 nfs4_opendata_put(opendata);
1701 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1703 struct nfs_server *server = NFS_SERVER(state->inode);
1704 struct nfs4_exception exception = { };
1708 err = _nfs4_open_expired(ctx, state);
1712 case -NFS4ERR_GRACE:
1713 case -NFS4ERR_DELAY:
1714 nfs4_handle_exception(server, err, &exception);
1717 } while (exception.retry);
1722 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1724 struct nfs_open_context *ctx;
1727 ctx = nfs4_state_find_open_context(state);
1729 return PTR_ERR(ctx);
1730 ret = nfs4_do_open_expired(ctx, state);
1731 put_nfs_open_context(ctx);
1735 #if defined(CONFIG_NFS_V4_1)
1736 static int nfs41_check_expired_stateid(struct nfs4_state *state, nfs4_stateid *stateid, unsigned int flags)
1738 int status = NFS_OK;
1739 struct nfs_server *server = NFS_SERVER(state->inode);
1741 if (state->flags & flags) {
1742 status = nfs41_test_stateid(server, stateid);
1743 if (status != NFS_OK) {
1744 nfs41_free_stateid(server, stateid);
1745 state->flags &= ~flags;
1751 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1753 int deleg_status, open_status;
1754 int deleg_flags = 1 << NFS_DELEGATED_STATE;
1755 int open_flags = (1 << NFS_O_RDONLY_STATE) | (1 << NFS_O_WRONLY_STATE) | (1 << NFS_O_RDWR_STATE);
1757 deleg_status = nfs41_check_expired_stateid(state, &state->stateid, deleg_flags);
1758 open_status = nfs41_check_expired_stateid(state, &state->open_stateid, open_flags);
1760 if ((deleg_status == NFS_OK) && (open_status == NFS_OK))
1762 return nfs4_open_expired(sp, state);
1767 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1768 * fields corresponding to attributes that were used to store the verifier.
1769 * Make sure we clobber those fields in the later setattr call
1771 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1773 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1774 !(sattr->ia_valid & ATTR_ATIME_SET))
1775 sattr->ia_valid |= ATTR_ATIME;
1777 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1778 !(sattr->ia_valid & ATTR_MTIME_SET))
1779 sattr->ia_valid |= ATTR_MTIME;
1783 * Returns a referenced nfs4_state
1785 static int _nfs4_do_open(struct inode *dir,
1786 struct dentry *dentry,
1789 struct iattr *sattr,
1790 struct rpc_cred *cred,
1791 struct nfs4_state **res,
1792 struct nfs4_threshold **ctx_th)
1794 struct nfs4_state_owner *sp;
1795 struct nfs4_state *state = NULL;
1796 struct nfs_server *server = NFS_SERVER(dir);
1797 struct nfs4_opendata *opendata;
1800 /* Protect against reboot recovery conflicts */
1802 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1804 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1807 status = nfs4_recover_expired_lease(server);
1809 goto err_put_state_owner;
1810 if (dentry->d_inode != NULL)
1811 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
1813 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
1814 if (opendata == NULL)
1815 goto err_put_state_owner;
1817 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1818 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1819 if (!opendata->f_attr.mdsthreshold)
1820 goto err_opendata_put;
1822 if (dentry->d_inode != NULL)
1823 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
1825 status = _nfs4_proc_open(opendata);
1827 goto err_opendata_put;
1829 state = nfs4_opendata_to_nfs4_state(opendata);
1830 status = PTR_ERR(state);
1832 goto err_opendata_put;
1833 if (server->caps & NFS_CAP_POSIX_LOCK)
1834 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1836 if (opendata->o_arg.open_flags & O_EXCL) {
1837 nfs4_exclusive_attrset(opendata, sattr);
1839 nfs_fattr_init(opendata->o_res.f_attr);
1840 status = nfs4_do_setattr(state->inode, cred,
1841 opendata->o_res.f_attr, sattr,
1844 nfs_setattr_update_inode(state->inode, sattr);
1845 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1848 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1849 *ctx_th = opendata->f_attr.mdsthreshold;
1851 kfree(opendata->f_attr.mdsthreshold);
1852 opendata->f_attr.mdsthreshold = NULL;
1854 nfs4_opendata_put(opendata);
1855 nfs4_put_state_owner(sp);
1859 kfree(opendata->f_attr.mdsthreshold);
1860 nfs4_opendata_put(opendata);
1861 err_put_state_owner:
1862 nfs4_put_state_owner(sp);
1869 static struct nfs4_state *nfs4_do_open(struct inode *dir,
1870 struct dentry *dentry,
1873 struct iattr *sattr,
1874 struct rpc_cred *cred,
1875 struct nfs4_threshold **ctx_th)
1877 struct nfs4_exception exception = { };
1878 struct nfs4_state *res;
1882 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1886 /* NOTE: BAD_SEQID means the server and client disagree about the
1887 * book-keeping w.r.t. state-changing operations
1888 * (OPEN/CLOSE/LOCK/LOCKU...)
1889 * It is actually a sign of a bug on the client or on the server.
1891 * If we receive a BAD_SEQID error in the particular case of
1892 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1893 * have unhashed the old state_owner for us, and that we can
1894 * therefore safely retry using a new one. We should still warn
1895 * the user though...
1897 if (status == -NFS4ERR_BAD_SEQID) {
1898 pr_warn_ratelimited("NFS: v4 server %s "
1899 " returned a bad sequence-id error!\n",
1900 NFS_SERVER(dir)->nfs_client->cl_hostname);
1901 exception.retry = 1;
1905 * BAD_STATEID on OPEN means that the server cancelled our
1906 * state before it received the OPEN_CONFIRM.
1907 * Recover by retrying the request as per the discussion
1908 * on Page 181 of RFC3530.
1910 if (status == -NFS4ERR_BAD_STATEID) {
1911 exception.retry = 1;
1914 if (status == -EAGAIN) {
1915 /* We must have found a delegation */
1916 exception.retry = 1;
1919 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1920 status, &exception));
1921 } while (exception.retry);
1925 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1926 struct nfs_fattr *fattr, struct iattr *sattr,
1927 struct nfs4_state *state)
1929 struct nfs_server *server = NFS_SERVER(inode);
1930 struct nfs_setattrargs arg = {
1931 .fh = NFS_FH(inode),
1934 .bitmask = server->attr_bitmask,
1936 struct nfs_setattrres res = {
1940 struct rpc_message msg = {
1941 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1946 unsigned long timestamp = jiffies;
1949 nfs_fattr_init(fattr);
1951 if (state != NULL) {
1952 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
1953 current->files, current->tgid);
1954 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
1956 /* Use that stateid */
1958 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1960 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1961 if (status == 0 && state != NULL)
1962 renew_lease(server, timestamp);
1966 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1967 struct nfs_fattr *fattr, struct iattr *sattr,
1968 struct nfs4_state *state)
1970 struct nfs_server *server = NFS_SERVER(inode);
1971 struct nfs4_exception exception = {
1977 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
1979 case -NFS4ERR_OPENMODE:
1980 if (state && !(state->state & FMODE_WRITE)) {
1982 if (sattr->ia_valid & ATTR_OPEN)
1987 err = nfs4_handle_exception(server, err, &exception);
1988 } while (exception.retry);
1993 struct nfs4_closedata {
1994 struct inode *inode;
1995 struct nfs4_state *state;
1996 struct nfs_closeargs arg;
1997 struct nfs_closeres res;
1998 struct nfs_fattr fattr;
1999 unsigned long timestamp;
2004 static void nfs4_free_closedata(void *data)
2006 struct nfs4_closedata *calldata = data;
2007 struct nfs4_state_owner *sp = calldata->state->owner;
2008 struct super_block *sb = calldata->state->inode->i_sb;
2011 pnfs_roc_release(calldata->state->inode);
2012 nfs4_put_open_state(calldata->state);
2013 nfs_free_seqid(calldata->arg.seqid);
2014 nfs4_put_state_owner(sp);
2015 nfs_sb_deactive(sb);
2019 static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2022 spin_lock(&state->owner->so_lock);
2023 if (!(fmode & FMODE_READ))
2024 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2025 if (!(fmode & FMODE_WRITE))
2026 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2027 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2028 spin_unlock(&state->owner->so_lock);
2031 static void nfs4_close_done(struct rpc_task *task, void *data)
2033 struct nfs4_closedata *calldata = data;
2034 struct nfs4_state *state = calldata->state;
2035 struct nfs_server *server = NFS_SERVER(calldata->inode);
2037 dprintk("%s: begin!\n", __func__);
2038 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2040 /* hmm. we are done with the inode, and in the process of freeing
2041 * the state_owner. we keep this around to process errors
2043 switch (task->tk_status) {
2046 pnfs_roc_set_barrier(state->inode,
2047 calldata->roc_barrier);
2048 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
2049 renew_lease(server, calldata->timestamp);
2050 nfs4_close_clear_stateid_flags(state,
2051 calldata->arg.fmode);
2053 case -NFS4ERR_STALE_STATEID:
2054 case -NFS4ERR_OLD_STATEID:
2055 case -NFS4ERR_BAD_STATEID:
2056 case -NFS4ERR_EXPIRED:
2057 if (calldata->arg.fmode == 0)
2060 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2061 rpc_restart_call_prepare(task);
2063 nfs_release_seqid(calldata->arg.seqid);
2064 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
2065 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
2068 static void nfs4_close_prepare(struct rpc_task *task, void *data)
2070 struct nfs4_closedata *calldata = data;
2071 struct nfs4_state *state = calldata->state;
2074 dprintk("%s: begin!\n", __func__);
2075 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
2078 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2079 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
2080 spin_lock(&state->owner->so_lock);
2081 /* Calculate the change in open mode */
2082 if (state->n_rdwr == 0) {
2083 if (state->n_rdonly == 0) {
2084 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2085 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2086 calldata->arg.fmode &= ~FMODE_READ;
2088 if (state->n_wronly == 0) {
2089 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2090 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2091 calldata->arg.fmode &= ~FMODE_WRITE;
2094 spin_unlock(&state->owner->so_lock);
2097 /* Note: exit _without_ calling nfs4_close_done */
2098 task->tk_action = NULL;
2102 if (calldata->arg.fmode == 0) {
2103 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
2104 if (calldata->roc &&
2105 pnfs_roc_drain(calldata->inode, &calldata->roc_barrier)) {
2106 rpc_sleep_on(&NFS_SERVER(calldata->inode)->roc_rpcwaitq,
2112 nfs_fattr_init(calldata->res.fattr);
2113 calldata->timestamp = jiffies;
2114 if (nfs4_setup_sequence(NFS_SERVER(calldata->inode),
2115 &calldata->arg.seq_args,
2116 &calldata->res.seq_res,
2119 rpc_call_start(task);
2121 dprintk("%s: done!\n", __func__);
2124 static const struct rpc_call_ops nfs4_close_ops = {
2125 .rpc_call_prepare = nfs4_close_prepare,
2126 .rpc_call_done = nfs4_close_done,
2127 .rpc_release = nfs4_free_closedata,
2131 * It is possible for data to be read/written from a mem-mapped file
2132 * after the sys_close call (which hits the vfs layer as a flush).
2133 * This means that we can't safely call nfsv4 close on a file until
2134 * the inode is cleared. This in turn means that we are not good
2135 * NFSv4 citizens - we do not indicate to the server to update the file's
2136 * share state even when we are done with one of the three share
2137 * stateid's in the inode.
2139 * NOTE: Caller must be holding the sp->so_owner semaphore!
2141 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc)
2143 struct nfs_server *server = NFS_SERVER(state->inode);
2144 struct nfs4_closedata *calldata;
2145 struct nfs4_state_owner *sp = state->owner;
2146 struct rpc_task *task;
2147 struct rpc_message msg = {
2148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2149 .rpc_cred = state->owner->so_cred,
2151 struct rpc_task_setup task_setup_data = {
2152 .rpc_client = server->client,
2153 .rpc_message = &msg,
2154 .callback_ops = &nfs4_close_ops,
2155 .workqueue = nfsiod_workqueue,
2156 .flags = RPC_TASK_ASYNC,
2158 int status = -ENOMEM;
2160 calldata = kzalloc(sizeof(*calldata), gfp_mask);
2161 if (calldata == NULL)
2163 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
2164 calldata->inode = state->inode;
2165 calldata->state = state;
2166 calldata->arg.fh = NFS_FH(state->inode);
2167 calldata->arg.stateid = &state->open_stateid;
2168 /* Serialization for the sequence id */
2169 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
2170 if (calldata->arg.seqid == NULL)
2171 goto out_free_calldata;
2172 calldata->arg.fmode = 0;
2173 calldata->arg.bitmask = server->cache_consistency_bitmask;
2174 calldata->res.fattr = &calldata->fattr;
2175 calldata->res.seqid = calldata->arg.seqid;
2176 calldata->res.server = server;
2177 calldata->roc = roc;
2178 nfs_sb_active(calldata->inode->i_sb);
2180 msg.rpc_argp = &calldata->arg;
2181 msg.rpc_resp = &calldata->res;
2182 task_setup_data.callback_data = calldata;
2183 task = rpc_run_task(&task_setup_data);
2185 return PTR_ERR(task);
2188 status = rpc_wait_for_completion_task(task);
2195 pnfs_roc_release(state->inode);
2196 nfs4_put_open_state(state);
2197 nfs4_put_state_owner(sp);
2201 static struct inode *
2202 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
2204 struct nfs4_state *state;
2206 /* Protect against concurrent sillydeletes */
2207 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2208 ctx->cred, &ctx->mdsthreshold);
2210 return ERR_CAST(state);
2212 return igrab(state->inode);
2215 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
2217 if (ctx->state == NULL)
2220 nfs4_close_sync(ctx->state, ctx->mode);
2222 nfs4_close_state(ctx->state, ctx->mode);
2225 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2227 struct nfs4_server_caps_arg args = {
2230 struct nfs4_server_caps_res res = {};
2231 struct rpc_message msg = {
2232 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
2238 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2240 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
2241 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2242 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2243 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2244 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2245 NFS_CAP_CTIME|NFS_CAP_MTIME);
2246 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2247 server->caps |= NFS_CAP_ACLS;
2248 if (res.has_links != 0)
2249 server->caps |= NFS_CAP_HARDLINKS;
2250 if (res.has_symlinks != 0)
2251 server->caps |= NFS_CAP_SYMLINKS;
2252 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2253 server->caps |= NFS_CAP_FILEID;
2254 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2255 server->caps |= NFS_CAP_MODE;
2256 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2257 server->caps |= NFS_CAP_NLINK;
2258 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2259 server->caps |= NFS_CAP_OWNER;
2260 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2261 server->caps |= NFS_CAP_OWNER_GROUP;
2262 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2263 server->caps |= NFS_CAP_ATIME;
2264 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2265 server->caps |= NFS_CAP_CTIME;
2266 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2267 server->caps |= NFS_CAP_MTIME;
2269 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2270 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2271 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
2272 server->acl_bitmask = res.acl_bitmask;
2273 server->fh_expire_type = res.fh_expire_type;
2279 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2281 struct nfs4_exception exception = { };
2284 err = nfs4_handle_exception(server,
2285 _nfs4_server_capabilities(server, fhandle),
2287 } while (exception.retry);
2291 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2292 struct nfs_fsinfo *info)
2294 struct nfs4_lookup_root_arg args = {
2295 .bitmask = nfs4_fattr_bitmap,
2297 struct nfs4_lookup_res res = {
2299 .fattr = info->fattr,
2302 struct rpc_message msg = {
2303 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2308 nfs_fattr_init(info->fattr);
2309 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2312 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2313 struct nfs_fsinfo *info)
2315 struct nfs4_exception exception = { };
2318 err = _nfs4_lookup_root(server, fhandle, info);
2321 case -NFS4ERR_WRONGSEC:
2324 err = nfs4_handle_exception(server, err, &exception);
2326 } while (exception.retry);
2331 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2332 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2334 struct rpc_auth *auth;
2337 auth = rpcauth_create(flavor, server->client);
2342 ret = nfs4_lookup_root(server, fhandle, info);
2347 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2348 struct nfs_fsinfo *info)
2350 int i, len, status = 0;
2351 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
2353 len = gss_mech_list_pseudoflavors(&flav_array[0]);
2354 flav_array[len] = RPC_AUTH_NULL;
2357 for (i = 0; i < len; i++) {
2358 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
2359 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2364 * -EACCESS could mean that the user doesn't have correct permissions
2365 * to access the mount. It could also mean that we tried to mount
2366 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2367 * existing mount programs don't handle -EACCES very well so it should
2368 * be mapped to -EPERM instead.
2370 if (status == -EACCES)
2376 * get the file handle for the "/" directory on the server
2378 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2379 struct nfs_fsinfo *info)
2381 int minor_version = server->nfs_client->cl_minorversion;
2382 int status = nfs4_lookup_root(server, fhandle, info);
2383 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2385 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2386 * by nfs4_map_errors() as this function exits.
2388 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
2390 status = nfs4_server_capabilities(server, fhandle);
2392 status = nfs4_do_fsinfo(server, fhandle, info);
2393 return nfs4_map_errors(status);
2396 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2397 struct nfs_fsinfo *info)
2400 struct nfs_fattr *fattr = info->fattr;
2402 error = nfs4_server_capabilities(server, mntfh);
2404 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2408 error = nfs4_proc_getattr(server, mntfh, fattr);
2410 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2414 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2415 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2416 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2422 * Get locations and (maybe) other attributes of a referral.
2423 * Note that we'll actually follow the referral later when
2424 * we detect fsid mismatch in inode revalidation
2426 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2427 const struct qstr *name, struct nfs_fattr *fattr,
2428 struct nfs_fh *fhandle)
2430 int status = -ENOMEM;
2431 struct page *page = NULL;
2432 struct nfs4_fs_locations *locations = NULL;
2434 page = alloc_page(GFP_KERNEL);
2437 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2438 if (locations == NULL)
2441 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
2444 /* Make sure server returned a different fsid for the referral */
2445 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
2446 dprintk("%s: server did not return a different fsid for"
2447 " a referral at %s\n", __func__, name->name);
2451 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2452 nfs_fixup_referral_attributes(&locations->fattr);
2454 /* replace the lookup nfs_fattr with the locations nfs_fattr */
2455 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
2456 memset(fhandle, 0, sizeof(struct nfs_fh));
2464 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2466 struct nfs4_getattr_arg args = {
2468 .bitmask = server->attr_bitmask,
2470 struct nfs4_getattr_res res = {
2474 struct rpc_message msg = {
2475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2480 nfs_fattr_init(fattr);
2481 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2484 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2486 struct nfs4_exception exception = { };
2489 err = nfs4_handle_exception(server,
2490 _nfs4_proc_getattr(server, fhandle, fattr),
2492 } while (exception.retry);
2497 * The file is not closed if it is opened due to the a request to change
2498 * the size of the file. The open call will not be needed once the
2499 * VFS layer lookup-intents are implemented.
2501 * Close is called when the inode is destroyed.
2502 * If we haven't opened the file for O_WRONLY, we
2503 * need to in the size_change case to obtain a stateid.
2506 * Because OPEN is always done by name in nfsv4, it is
2507 * possible that we opened a different file by the same
2508 * name. We can recognize this race condition, but we
2509 * can't do anything about it besides returning an error.
2511 * This will be fixed with VFS changes (lookup-intent).
2514 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2515 struct iattr *sattr)
2517 struct inode *inode = dentry->d_inode;
2518 struct rpc_cred *cred = NULL;
2519 struct nfs4_state *state = NULL;
2522 if (pnfs_ld_layoutret_on_setattr(inode))
2523 pnfs_return_layout(inode);
2525 nfs_fattr_init(fattr);
2527 /* Search for an existing open(O_WRITE) file */
2528 if (sattr->ia_valid & ATTR_FILE) {
2529 struct nfs_open_context *ctx;
2531 ctx = nfs_file_open_context(sattr->ia_file);
2538 /* Deal with open(O_TRUNC) */
2539 if (sattr->ia_valid & ATTR_OPEN)
2540 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2542 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
2544 nfs_setattr_update_inode(inode, sattr);
2548 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2549 const struct qstr *name, struct nfs_fh *fhandle,
2550 struct nfs_fattr *fattr)
2552 struct nfs_server *server = NFS_SERVER(dir);
2554 struct nfs4_lookup_arg args = {
2555 .bitmask = server->attr_bitmask,
2556 .dir_fh = NFS_FH(dir),
2559 struct nfs4_lookup_res res = {
2564 struct rpc_message msg = {
2565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2570 nfs_fattr_init(fattr);
2572 dprintk("NFS call lookup %s\n", name->name);
2573 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
2574 dprintk("NFS reply lookup: %d\n", status);
2578 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
2580 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
2581 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
2582 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2586 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2587 struct qstr *name, struct nfs_fh *fhandle,
2588 struct nfs_fattr *fattr)
2590 struct nfs4_exception exception = { };
2591 struct rpc_clnt *client = *clnt;
2594 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2596 case -NFS4ERR_BADNAME:
2599 case -NFS4ERR_MOVED:
2600 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
2602 case -NFS4ERR_WRONGSEC:
2604 if (client != *clnt)
2607 client = nfs4_create_sec_client(client, dir, name);
2609 return PTR_ERR(client);
2611 exception.retry = 1;
2614 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
2616 } while (exception.retry);
2621 else if (client != *clnt)
2622 rpc_shutdown_client(client);
2627 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
2628 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2631 struct rpc_clnt *client = NFS_CLIENT(dir);
2633 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2634 if (client != NFS_CLIENT(dir)) {
2635 rpc_shutdown_client(client);
2636 nfs_fixup_secinfo_attributes(fattr);
2642 nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2643 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2646 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2648 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2650 rpc_shutdown_client(client);
2651 return ERR_PTR(status);
2656 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2658 struct nfs_server *server = NFS_SERVER(inode);
2659 struct nfs4_accessargs args = {
2660 .fh = NFS_FH(inode),
2661 .bitmask = server->cache_consistency_bitmask,
2663 struct nfs4_accessres res = {
2666 struct rpc_message msg = {
2667 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2670 .rpc_cred = entry->cred,
2672 int mode = entry->mask;
2676 * Determine which access bits we want to ask for...
2678 if (mode & MAY_READ)
2679 args.access |= NFS4_ACCESS_READ;
2680 if (S_ISDIR(inode->i_mode)) {
2681 if (mode & MAY_WRITE)
2682 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2683 if (mode & MAY_EXEC)
2684 args.access |= NFS4_ACCESS_LOOKUP;
2686 if (mode & MAY_WRITE)
2687 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2688 if (mode & MAY_EXEC)
2689 args.access |= NFS4_ACCESS_EXECUTE;
2692 res.fattr = nfs_alloc_fattr();
2693 if (res.fattr == NULL)
2696 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
2699 if (res.access & NFS4_ACCESS_READ)
2700 entry->mask |= MAY_READ;
2701 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
2702 entry->mask |= MAY_WRITE;
2703 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
2704 entry->mask |= MAY_EXEC;
2705 nfs_refresh_inode(inode, res.fattr);
2707 nfs_free_fattr(res.fattr);
2711 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2713 struct nfs4_exception exception = { };
2716 err = nfs4_handle_exception(NFS_SERVER(inode),
2717 _nfs4_proc_access(inode, entry),
2719 } while (exception.retry);
2724 * TODO: For the time being, we don't try to get any attributes
2725 * along with any of the zero-copy operations READ, READDIR,
2728 * In the case of the first three, we want to put the GETATTR
2729 * after the read-type operation -- this is because it is hard
2730 * to predict the length of a GETATTR response in v4, and thus
2731 * align the READ data correctly. This means that the GETATTR
2732 * may end up partially falling into the page cache, and we should
2733 * shift it into the 'tail' of the xdr_buf before processing.
2734 * To do this efficiently, we need to know the total length
2735 * of data received, which doesn't seem to be available outside
2738 * In the case of WRITE, we also want to put the GETATTR after
2739 * the operation -- in this case because we want to make sure
2740 * we get the post-operation mtime and size. This means that
2741 * we can't use xdr_encode_pages() as written: we need a variant
2742 * of it which would leave room in the 'tail' iovec.
2744 * Both of these changes to the XDR layer would in fact be quite
2745 * minor, but I decided to leave them for a subsequent patch.
2747 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2748 unsigned int pgbase, unsigned int pglen)
2750 struct nfs4_readlink args = {
2751 .fh = NFS_FH(inode),
2756 struct nfs4_readlink_res res;
2757 struct rpc_message msg = {
2758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2763 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
2766 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2767 unsigned int pgbase, unsigned int pglen)
2769 struct nfs4_exception exception = { };
2772 err = nfs4_handle_exception(NFS_SERVER(inode),
2773 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2775 } while (exception.retry);
2781 * We will need to arrange for the VFS layer to provide an atomic open.
2782 * Until then, this create/open method is prone to inefficiency and race
2783 * conditions due to the lookup, create, and open VFS calls from sys_open()
2784 * placed on the wire.
2786 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2787 * The file will be opened again in the subsequent VFS open call
2788 * (nfs4_proc_file_open).
2790 * The open for read will just hang around to be used by any process that
2791 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2795 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
2796 int flags, struct nfs_open_context *ctx)
2798 struct dentry *de = dentry;
2799 struct nfs4_state *state;
2800 struct rpc_cred *cred = NULL;
2809 sattr->ia_mode &= ~current_umask();
2810 state = nfs4_do_open(dir, de, fmode, flags, sattr, cred, NULL);
2812 if (IS_ERR(state)) {
2813 status = PTR_ERR(state);
2816 d_add(dentry, igrab(state->inode));
2817 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2821 nfs4_close_sync(state, fmode);
2826 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2828 struct nfs_server *server = NFS_SERVER(dir);
2829 struct nfs_removeargs args = {
2831 .name.len = name->len,
2832 .name.name = name->name,
2834 struct nfs_removeres res = {
2837 struct rpc_message msg = {
2838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2844 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
2846 update_changeattr(dir, &res.cinfo);
2850 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2852 struct nfs4_exception exception = { };
2855 err = nfs4_handle_exception(NFS_SERVER(dir),
2856 _nfs4_proc_remove(dir, name),
2858 } while (exception.retry);
2862 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2864 struct nfs_server *server = NFS_SERVER(dir);
2865 struct nfs_removeargs *args = msg->rpc_argp;
2866 struct nfs_removeres *res = msg->rpc_resp;
2868 res->server = server;
2869 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2870 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
2873 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2875 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2876 &data->args.seq_args,
2880 rpc_call_start(task);
2883 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2885 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2887 if (!nfs4_sequence_done(task, &res->seq_res))
2889 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2891 update_changeattr(dir, &res->cinfo);
2895 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2897 struct nfs_server *server = NFS_SERVER(dir);
2898 struct nfs_renameargs *arg = msg->rpc_argp;
2899 struct nfs_renameres *res = msg->rpc_resp;
2901 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
2902 res->server = server;
2903 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
2906 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2908 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2909 &data->args.seq_args,
2913 rpc_call_start(task);
2916 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2917 struct inode *new_dir)
2919 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2921 if (!nfs4_sequence_done(task, &res->seq_res))
2923 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2926 update_changeattr(old_dir, &res->old_cinfo);
2927 update_changeattr(new_dir, &res->new_cinfo);
2931 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2932 struct inode *new_dir, struct qstr *new_name)
2934 struct nfs_server *server = NFS_SERVER(old_dir);
2935 struct nfs_renameargs arg = {
2936 .old_dir = NFS_FH(old_dir),
2937 .new_dir = NFS_FH(new_dir),
2938 .old_name = old_name,
2939 .new_name = new_name,
2941 struct nfs_renameres res = {
2944 struct rpc_message msg = {
2945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2949 int status = -ENOMEM;
2951 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2953 update_changeattr(old_dir, &res.old_cinfo);
2954 update_changeattr(new_dir, &res.new_cinfo);
2959 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2960 struct inode *new_dir, struct qstr *new_name)
2962 struct nfs4_exception exception = { };
2965 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2966 _nfs4_proc_rename(old_dir, old_name,
2969 } while (exception.retry);
2973 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2975 struct nfs_server *server = NFS_SERVER(inode);
2976 struct nfs4_link_arg arg = {
2977 .fh = NFS_FH(inode),
2978 .dir_fh = NFS_FH(dir),
2980 .bitmask = server->attr_bitmask,
2982 struct nfs4_link_res res = {
2985 struct rpc_message msg = {
2986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2990 int status = -ENOMEM;
2992 res.fattr = nfs_alloc_fattr();
2993 if (res.fattr == NULL)
2996 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
2998 update_changeattr(dir, &res.cinfo);
2999 nfs_post_op_update_inode(inode, res.fattr);
3002 nfs_free_fattr(res.fattr);
3006 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3008 struct nfs4_exception exception = { };
3011 err = nfs4_handle_exception(NFS_SERVER(inode),
3012 _nfs4_proc_link(inode, dir, name),
3014 } while (exception.retry);
3018 struct nfs4_createdata {
3019 struct rpc_message msg;
3020 struct nfs4_create_arg arg;
3021 struct nfs4_create_res res;
3023 struct nfs_fattr fattr;
3026 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3027 struct qstr *name, struct iattr *sattr, u32 ftype)
3029 struct nfs4_createdata *data;
3031 data = kzalloc(sizeof(*data), GFP_KERNEL);
3033 struct nfs_server *server = NFS_SERVER(dir);
3035 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3036 data->msg.rpc_argp = &data->arg;
3037 data->msg.rpc_resp = &data->res;
3038 data->arg.dir_fh = NFS_FH(dir);
3039 data->arg.server = server;
3040 data->arg.name = name;
3041 data->arg.attrs = sattr;
3042 data->arg.ftype = ftype;
3043 data->arg.bitmask = server->attr_bitmask;
3044 data->res.server = server;
3045 data->res.fh = &data->fh;
3046 data->res.fattr = &data->fattr;
3047 nfs_fattr_init(data->res.fattr);
3052 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3054 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
3055 &data->arg.seq_args, &data->res.seq_res, 1);
3057 update_changeattr(dir, &data->res.dir_cinfo);
3058 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3063 static void nfs4_free_createdata(struct nfs4_createdata *data)
3068 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3069 struct page *page, unsigned int len, struct iattr *sattr)
3071 struct nfs4_createdata *data;
3072 int status = -ENAMETOOLONG;
3074 if (len > NFS4_MAXPATHLEN)
3078 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3082 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3083 data->arg.u.symlink.pages = &page;
3084 data->arg.u.symlink.len = len;
3086 status = nfs4_do_create(dir, dentry, data);
3088 nfs4_free_createdata(data);
3093 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
3094 struct page *page, unsigned int len, struct iattr *sattr)
3096 struct nfs4_exception exception = { };
3099 err = nfs4_handle_exception(NFS_SERVER(dir),
3100 _nfs4_proc_symlink(dir, dentry, page,
3103 } while (exception.retry);
3107 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3108 struct iattr *sattr)
3110 struct nfs4_createdata *data;
3111 int status = -ENOMEM;
3113 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3117 status = nfs4_do_create(dir, dentry, data);
3119 nfs4_free_createdata(data);
3124 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3125 struct iattr *sattr)
3127 struct nfs4_exception exception = { };
3130 sattr->ia_mode &= ~current_umask();
3132 err = nfs4_handle_exception(NFS_SERVER(dir),
3133 _nfs4_proc_mkdir(dir, dentry, sattr),
3135 } while (exception.retry);
3139 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3140 u64 cookie, struct page **pages, unsigned int count, int plus)
3142 struct inode *dir = dentry->d_inode;
3143 struct nfs4_readdir_arg args = {
3148 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
3151 struct nfs4_readdir_res res;
3152 struct rpc_message msg = {
3153 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3160 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
3161 dentry->d_parent->d_name.name,
3162 dentry->d_name.name,
3163 (unsigned long long)cookie);
3164 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
3165 res.pgbase = args.pgbase;
3166 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
3168 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
3169 status += args.pgbase;
3172 nfs_invalidate_atime(dir);
3174 dprintk("%s: returns %d\n", __func__, status);
3178 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
3179 u64 cookie, struct page **pages, unsigned int count, int plus)
3181 struct nfs4_exception exception = { };
3184 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3185 _nfs4_proc_readdir(dentry, cred, cookie,
3186 pages, count, plus),
3188 } while (exception.retry);
3192 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3193 struct iattr *sattr, dev_t rdev)
3195 struct nfs4_createdata *data;
3196 int mode = sattr->ia_mode;
3197 int status = -ENOMEM;
3199 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
3200 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
3202 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3207 data->arg.ftype = NF4FIFO;
3208 else if (S_ISBLK(mode)) {
3209 data->arg.ftype = NF4BLK;
3210 data->arg.u.device.specdata1 = MAJOR(rdev);
3211 data->arg.u.device.specdata2 = MINOR(rdev);
3213 else if (S_ISCHR(mode)) {
3214 data->arg.ftype = NF4CHR;
3215 data->arg.u.device.specdata1 = MAJOR(rdev);
3216 data->arg.u.device.specdata2 = MINOR(rdev);
3219 status = nfs4_do_create(dir, dentry, data);
3221 nfs4_free_createdata(data);
3226 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3227 struct iattr *sattr, dev_t rdev)
3229 struct nfs4_exception exception = { };
3232 sattr->ia_mode &= ~current_umask();
3234 err = nfs4_handle_exception(NFS_SERVER(dir),
3235 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3237 } while (exception.retry);
3241 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3242 struct nfs_fsstat *fsstat)
3244 struct nfs4_statfs_arg args = {
3246 .bitmask = server->attr_bitmask,
3248 struct nfs4_statfs_res res = {
3251 struct rpc_message msg = {
3252 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3257 nfs_fattr_init(fsstat->fattr);
3258 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3261 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3263 struct nfs4_exception exception = { };
3266 err = nfs4_handle_exception(server,
3267 _nfs4_proc_statfs(server, fhandle, fsstat),
3269 } while (exception.retry);
3273 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3274 struct nfs_fsinfo *fsinfo)
3276 struct nfs4_fsinfo_arg args = {
3278 .bitmask = server->attr_bitmask,
3280 struct nfs4_fsinfo_res res = {
3283 struct rpc_message msg = {
3284 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3289 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3292 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3294 struct nfs4_exception exception = { };
3298 err = nfs4_handle_exception(server,
3299 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3301 } while (exception.retry);
3305 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3307 nfs_fattr_init(fsinfo->fattr);
3308 return nfs4_do_fsinfo(server, fhandle, fsinfo);
3311 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3312 struct nfs_pathconf *pathconf)
3314 struct nfs4_pathconf_arg args = {
3316 .bitmask = server->attr_bitmask,
3318 struct nfs4_pathconf_res res = {
3319 .pathconf = pathconf,
3321 struct rpc_message msg = {
3322 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3327 /* None of the pathconf attributes are mandatory to implement */
3328 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3329 memset(pathconf, 0, sizeof(*pathconf));
3333 nfs_fattr_init(pathconf->fattr);
3334 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3337 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3338 struct nfs_pathconf *pathconf)
3340 struct nfs4_exception exception = { };
3344 err = nfs4_handle_exception(server,
3345 _nfs4_proc_pathconf(server, fhandle, pathconf),
3347 } while (exception.retry);
3351 void __nfs4_read_done_cb(struct nfs_read_data *data)
3353 nfs_invalidate_atime(data->header->inode);
3356 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
3358 struct nfs_server *server = NFS_SERVER(data->header->inode);
3360 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
3361 rpc_restart_call_prepare(task);
3365 __nfs4_read_done_cb(data);
3366 if (task->tk_status > 0)
3367 renew_lease(server, data->timestamp);
3371 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3374 dprintk("--> %s\n", __func__);
3376 if (!nfs4_sequence_done(task, &data->res.seq_res))
3379 return data->read_done_cb ? data->read_done_cb(task, data) :
3380 nfs4_read_done_cb(task, data);
3383 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
3385 data->timestamp = jiffies;
3386 data->read_done_cb = nfs4_read_done_cb;
3387 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
3388 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
3391 static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3393 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3394 &data->args.seq_args,
3398 rpc_call_start(task);
3401 static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
3403 struct inode *inode = data->header->inode;
3405 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
3406 rpc_restart_call_prepare(task);
3409 if (task->tk_status >= 0) {
3410 renew_lease(NFS_SERVER(inode), data->timestamp);
3411 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
3416 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3418 if (!nfs4_sequence_done(task, &data->res.seq_res))
3420 return data->write_done_cb ? data->write_done_cb(task, data) :
3421 nfs4_write_done_cb(task, data);
3425 bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
3427 const struct nfs_pgio_header *hdr = data->header;
3429 /* Don't request attributes for pNFS or O_DIRECT writes */
3430 if (data->ds_clp != NULL || hdr->dreq != NULL)
3432 /* Otherwise, request attributes if and only if we don't hold
3435 return nfs_have_delegation(hdr->inode, FMODE_READ) == 0;
3438 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
3440 struct nfs_server *server = NFS_SERVER(data->header->inode);
3442 if (!nfs4_write_need_cache_consistency_data(data)) {
3443 data->args.bitmask = NULL;
3444 data->res.fattr = NULL;
3446 data->args.bitmask = server->cache_consistency_bitmask;
3448 if (!data->write_done_cb)
3449 data->write_done_cb = nfs4_write_done_cb;
3450 data->res.server = server;
3451 data->timestamp = jiffies;
3453 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
3454 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3457 static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3459 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3460 &data->args.seq_args,
3464 rpc_call_start(task);
3467 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
3469 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3470 &data->args.seq_args,
3474 rpc_call_start(task);
3477 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
3479 struct inode *inode = data->inode;
3481 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
3482 rpc_restart_call_prepare(task);
3488 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
3490 if (!nfs4_sequence_done(task, &data->res.seq_res))
3492 return data->commit_done_cb(task, data);
3495 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
3497 struct nfs_server *server = NFS_SERVER(data->inode);
3499 if (data->commit_done_cb == NULL)
3500 data->commit_done_cb = nfs4_commit_done_cb;
3501 data->res.server = server;
3502 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
3503 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
3506 struct nfs4_renewdata {
3507 struct nfs_client *client;
3508 unsigned long timestamp;
3512 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3513 * standalone procedure for queueing an asynchronous RENEW.
3515 static void nfs4_renew_release(void *calldata)
3517 struct nfs4_renewdata *data = calldata;
3518 struct nfs_client *clp = data->client;
3520 if (atomic_read(&clp->cl_count) > 1)
3521 nfs4_schedule_state_renewal(clp);
3522 nfs_put_client(clp);
3526 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
3528 struct nfs4_renewdata *data = calldata;
3529 struct nfs_client *clp = data->client;
3530 unsigned long timestamp = data->timestamp;
3532 if (task->tk_status < 0) {
3533 /* Unless we're shutting down, schedule state recovery! */
3534 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3536 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
3537 nfs4_schedule_lease_recovery(clp);
3540 nfs4_schedule_path_down_recovery(clp);
3542 do_renew_lease(clp, timestamp);
3545 static const struct rpc_call_ops nfs4_renew_ops = {
3546 .rpc_call_done = nfs4_renew_done,
3547 .rpc_release = nfs4_renew_release,
3550 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
3552 struct rpc_message msg = {
3553 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3557 struct nfs4_renewdata *data;
3559 if (renew_flags == 0)
3561 if (!atomic_inc_not_zero(&clp->cl_count))
3563 data = kmalloc(sizeof(*data), GFP_NOFS);
3567 data->timestamp = jiffies;
3568 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
3569 &nfs4_renew_ops, data);
3572 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
3574 struct rpc_message msg = {
3575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3579 unsigned long now = jiffies;
3582 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3585 do_renew_lease(clp, now);
3589 static inline int nfs4_server_supports_acls(struct nfs_server *server)
3591 return (server->caps & NFS_CAP_ACLS)
3592 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3593 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3596 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
3597 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
3600 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
3602 static int buf_to_pages_noslab(const void *buf, size_t buflen,
3603 struct page **pages, unsigned int *pgbase)
3605 struct page *newpage, **spages;
3611 len = min_t(size_t, PAGE_CACHE_SIZE, buflen);
3612 newpage = alloc_page(GFP_KERNEL);
3614 if (newpage == NULL)
3616 memcpy(page_address(newpage), buf, len);
3621 } while (buflen != 0);
3627 __free_page(spages[rc-1]);
3631 struct nfs4_cached_acl {
3637 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3639 struct nfs_inode *nfsi = NFS_I(inode);
3641 spin_lock(&inode->i_lock);
3642 kfree(nfsi->nfs4_acl);
3643 nfsi->nfs4_acl = acl;
3644 spin_unlock(&inode->i_lock);
3647 static void nfs4_zap_acl_attr(struct inode *inode)
3649 nfs4_set_cached_acl(inode, NULL);
3652 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3654 struct nfs_inode *nfsi = NFS_I(inode);
3655 struct nfs4_cached_acl *acl;
3658 spin_lock(&inode->i_lock);
3659 acl = nfsi->nfs4_acl;
3662 if (buf == NULL) /* user is just asking for length */
3664 if (acl->cached == 0)
3666 ret = -ERANGE; /* see getxattr(2) man page */
3667 if (acl->len > buflen)
3669 memcpy(buf, acl->data, acl->len);
3673 spin_unlock(&inode->i_lock);
3677 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
3679 struct nfs4_cached_acl *acl;
3681 if (pages && acl_len <= PAGE_SIZE) {
3682 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
3686 _copy_from_pages(acl->data, pages, pgbase, acl_len);
3688 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3695 nfs4_set_cached_acl(inode, acl);
3699 * The getxattr API returns the required buffer length when called with a
3700 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3701 * the required buf. On a NULL buf, we send a page of data to the server
3702 * guessing that the ACL request can be serviced by a page. If so, we cache
3703 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3704 * the cache. If not so, we throw away the page, and cache the required
3705 * length. The next getxattr call will then produce another round trip to
3706 * the server, this time with the input buf of the required size.
3708 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3710 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
3711 struct nfs_getaclargs args = {
3712 .fh = NFS_FH(inode),
3716 struct nfs_getaclres res = {
3719 struct rpc_message msg = {
3720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3724 int ret = -ENOMEM, npages, i, acl_len = 0;
3726 npages = (buflen + PAGE_SIZE - 1) >> PAGE_SHIFT;
3727 /* As long as we're doing a round trip to the server anyway,
3728 * let's be prepared for a page of acl data. */
3732 /* Add an extra page to handle the bitmap returned */
3735 for (i = 0; i < npages; i++) {
3736 pages[i] = alloc_page(GFP_KERNEL);
3741 /* for decoding across pages */
3742 res.acl_scratch = alloc_page(GFP_KERNEL);
3743 if (!res.acl_scratch)
3746 args.acl_len = npages * PAGE_SIZE;
3747 args.acl_pgbase = 0;
3749 /* Let decode_getfacl know not to fail if the ACL data is larger than
3750 * the page we send as a guess */
3752 res.acl_flags |= NFS4_ACL_LEN_REQUEST;
3754 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
3755 __func__, buf, buflen, npages, args.acl_len);
3756 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3757 &msg, &args.seq_args, &res.seq_res, 0);
3761 acl_len = res.acl_len - res.acl_data_offset;
3762 if (acl_len > args.acl_len)
3763 nfs4_write_cached_acl(inode, NULL, 0, acl_len);
3765 nfs4_write_cached_acl(inode, pages, res.acl_data_offset,
3769 if (acl_len > buflen)
3771 _copy_from_pages(buf, pages, res.acl_data_offset,
3776 for (i = 0; i < npages; i++)
3778 __free_page(pages[i]);
3779 if (res.acl_scratch)
3780 __free_page(res.acl_scratch);
3784 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3786 struct nfs4_exception exception = { };
3789 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3792 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3793 } while (exception.retry);
3797 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3799 struct nfs_server *server = NFS_SERVER(inode);
3802 if (!nfs4_server_supports_acls(server))
3804 ret = nfs_revalidate_inode(server, inode);
3807 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3808 nfs_zap_acl_cache(inode);
3809 ret = nfs4_read_cached_acl(inode, buf, buflen);
3811 /* -ENOENT is returned if there is no ACL or if there is an ACL
3812 * but no cached acl data, just the acl length */
3814 return nfs4_get_acl_uncached(inode, buf, buflen);
3817 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3819 struct nfs_server *server = NFS_SERVER(inode);
3820 struct page *pages[NFS4ACL_MAXPAGES];
3821 struct nfs_setaclargs arg = {
3822 .fh = NFS_FH(inode),
3826 struct nfs_setaclres res;
3827 struct rpc_message msg = {
3828 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3834 if (!nfs4_server_supports_acls(server))
3836 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3839 nfs_inode_return_delegation(inode);
3840 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
3843 * Free each page after tx, so the only ref left is
3844 * held by the network stack
3847 put_page(pages[i-1]);
3850 * Acl update can result in inode attribute update.
3851 * so mark the attribute cache invalid.
3853 spin_lock(&inode->i_lock);
3854 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3855 spin_unlock(&inode->i_lock);
3856 nfs_access_zap_cache(inode);
3857 nfs_zap_acl_cache(inode);
3861 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3863 struct nfs4_exception exception = { };
3866 err = nfs4_handle_exception(NFS_SERVER(inode),
3867 __nfs4_proc_set_acl(inode, buf, buflen),
3869 } while (exception.retry);
3874 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
3876 struct nfs_client *clp = server->nfs_client;
3878 if (task->tk_status >= 0)
3880 switch(task->tk_status) {
3881 case -NFS4ERR_DELEG_REVOKED:
3882 case -NFS4ERR_ADMIN_REVOKED:
3883 case -NFS4ERR_BAD_STATEID:
3886 nfs_remove_bad_delegation(state->inode);
3887 case -NFS4ERR_OPENMODE:
3890 nfs4_schedule_stateid_recovery(server, state);
3891 goto wait_on_recovery;
3892 case -NFS4ERR_EXPIRED:
3894 nfs4_schedule_stateid_recovery(server, state);
3895 case -NFS4ERR_STALE_STATEID:
3896 case -NFS4ERR_STALE_CLIENTID:
3897 nfs4_schedule_lease_recovery(clp);
3898 goto wait_on_recovery;
3899 #if defined(CONFIG_NFS_V4_1)
3900 case -NFS4ERR_BADSESSION:
3901 case -NFS4ERR_BADSLOT:
3902 case -NFS4ERR_BAD_HIGH_SLOT:
3903 case -NFS4ERR_DEADSESSION:
3904 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3905 case -NFS4ERR_SEQ_FALSE_RETRY:
3906 case -NFS4ERR_SEQ_MISORDERED:
3907 dprintk("%s ERROR %d, Reset session\n", __func__,
3909 nfs4_schedule_session_recovery(clp->cl_session);
3910 task->tk_status = 0;
3912 #endif /* CONFIG_NFS_V4_1 */
3913 case -NFS4ERR_DELAY:
3914 nfs_inc_server_stats(server, NFSIOS_DELAY);
3915 case -NFS4ERR_GRACE:
3917 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3918 task->tk_status = 0;
3920 case -NFS4ERR_RETRY_UNCACHED_REP:
3921 case -NFS4ERR_OLD_STATEID:
3922 task->tk_status = 0;
3925 task->tk_status = nfs4_map_errors(task->tk_status);
3928 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
3929 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3930 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3931 task->tk_status = 0;
3935 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3936 nfs4_verifier *bootverf)
3940 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3941 /* An impossible timestamp guarantees this value
3942 * will never match a generated boot time. */
3944 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3946 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
3947 verf[0] = (__be32)nn->boot_time.tv_sec;
3948 verf[1] = (__be32)nn->boot_time.tv_nsec;
3950 memcpy(bootverf->data, verf, sizeof(bootverf->data));
3953 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
3954 unsigned short port, struct rpc_cred *cred,
3955 struct nfs4_setclientid_res *res)
3957 nfs4_verifier sc_verifier;
3958 struct nfs4_setclientid setclientid = {
3959 .sc_verifier = &sc_verifier,
3961 .sc_cb_ident = clp->cl_cb_ident,
3963 struct rpc_message msg = {
3964 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
3965 .rpc_argp = &setclientid,
3972 nfs4_init_boot_verifier(clp, &sc_verifier);
3976 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
3977 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
3979 rpc_peeraddr2str(clp->cl_rpcclient,
3981 rpc_peeraddr2str(clp->cl_rpcclient,
3983 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3984 clp->cl_id_uniquifier);
3985 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
3986 sizeof(setclientid.sc_netid),
3987 rpc_peeraddr2str(clp->cl_rpcclient,
3988 RPC_DISPLAY_NETID));
3989 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
3990 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
3991 clp->cl_ipaddr, port >> 8, port & 255);
3994 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
3995 if (status != -NFS4ERR_CLID_INUSE)
3998 ++clp->cl_id_uniquifier;
4002 ssleep(clp->cl_lease_time / HZ + 1);
4007 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
4008 struct nfs4_setclientid_res *arg,
4009 struct rpc_cred *cred)
4011 struct nfs_fsinfo fsinfo;
4012 struct rpc_message msg = {
4013 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
4015 .rpc_resp = &fsinfo,
4022 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4024 spin_lock(&clp->cl_lock);
4025 clp->cl_lease_time = fsinfo.lease_time * HZ;
4026 clp->cl_last_renewal = now;
4027 spin_unlock(&clp->cl_lock);
4032 struct nfs4_delegreturndata {
4033 struct nfs4_delegreturnargs args;
4034 struct nfs4_delegreturnres res;
4036 nfs4_stateid stateid;
4037 unsigned long timestamp;
4038 struct nfs_fattr fattr;
4042 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4044 struct nfs4_delegreturndata *data = calldata;
4046 if (!nfs4_sequence_done(task, &data->res.seq_res))
4049 switch (task->tk_status) {
4050 case -NFS4ERR_STALE_STATEID:
4051 case -NFS4ERR_EXPIRED:
4053 renew_lease(data->res.server, data->timestamp);
4056 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4058 rpc_restart_call_prepare(task);
4062 data->rpc_status = task->tk_status;
4065 static void nfs4_delegreturn_release(void *calldata)
4070 #if defined(CONFIG_NFS_V4_1)
4071 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4073 struct nfs4_delegreturndata *d_data;
4075 d_data = (struct nfs4_delegreturndata *)data;
4077 if (nfs4_setup_sequence(d_data->res.server,
4078 &d_data->args.seq_args,
4079 &d_data->res.seq_res, task))
4081 rpc_call_start(task);
4083 #endif /* CONFIG_NFS_V4_1 */
4085 static const struct rpc_call_ops nfs4_delegreturn_ops = {
4086 #if defined(CONFIG_NFS_V4_1)
4087 .rpc_call_prepare = nfs4_delegreturn_prepare,
4088 #endif /* CONFIG_NFS_V4_1 */
4089 .rpc_call_done = nfs4_delegreturn_done,
4090 .rpc_release = nfs4_delegreturn_release,
4093 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4095 struct nfs4_delegreturndata *data;
4096 struct nfs_server *server = NFS_SERVER(inode);
4097 struct rpc_task *task;
4098 struct rpc_message msg = {
4099 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4102 struct rpc_task_setup task_setup_data = {
4103 .rpc_client = server->client,
4104 .rpc_message = &msg,
4105 .callback_ops = &nfs4_delegreturn_ops,
4106 .flags = RPC_TASK_ASYNC,
4110 data = kzalloc(sizeof(*data), GFP_NOFS);
4113 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4114 data->args.fhandle = &data->fh;
4115 data->args.stateid = &data->stateid;
4116 data->args.bitmask = server->cache_consistency_bitmask;
4117 nfs_copy_fh(&data->fh, NFS_FH(inode));
4118 nfs4_stateid_copy(&data->stateid, stateid);
4119 data->res.fattr = &data->fattr;
4120 data->res.server = server;
4121 nfs_fattr_init(data->res.fattr);
4122 data->timestamp = jiffies;
4123 data->rpc_status = 0;
4125 task_setup_data.callback_data = data;
4126 msg.rpc_argp = &data->args;
4127 msg.rpc_resp = &data->res;
4128 task = rpc_run_task(&task_setup_data);
4130 return PTR_ERR(task);
4133 status = nfs4_wait_for_completion_rpc_task(task);
4136 status = data->rpc_status;
4138 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4140 nfs_refresh_inode(inode, &data->fattr);
4146 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
4148 struct nfs_server *server = NFS_SERVER(inode);
4149 struct nfs4_exception exception = { };
4152 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
4154 case -NFS4ERR_STALE_STATEID:
4155 case -NFS4ERR_EXPIRED:
4159 err = nfs4_handle_exception(server, err, &exception);
4160 } while (exception.retry);
4164 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4165 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4168 * sleep, with exponential backoff, and retry the LOCK operation.
4170 static unsigned long
4171 nfs4_set_lock_task_retry(unsigned long timeout)
4173 freezable_schedule_timeout_killable(timeout);
4175 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4176 return NFS4_LOCK_MAXTIMEOUT;
4180 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4182 struct inode *inode = state->inode;
4183 struct nfs_server *server = NFS_SERVER(inode);
4184 struct nfs_client *clp = server->nfs_client;
4185 struct nfs_lockt_args arg = {
4186 .fh = NFS_FH(inode),
4189 struct nfs_lockt_res res = {
4192 struct rpc_message msg = {
4193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4196 .rpc_cred = state->owner->so_cred,
4198 struct nfs4_lock_state *lsp;
4201 arg.lock_owner.clientid = clp->cl_clientid;
4202 status = nfs4_set_lock_state(state, request);
4205 lsp = request->fl_u.nfs4_fl.owner;
4206 arg.lock_owner.id = lsp->ls_seqid.owner_id;
4207 arg.lock_owner.s_dev = server->s_dev;
4208 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4211 request->fl_type = F_UNLCK;
4213 case -NFS4ERR_DENIED:
4216 request->fl_ops->fl_release_private(request);
4221 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4223 struct nfs4_exception exception = { };
4227 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4228 _nfs4_proc_getlk(state, cmd, request),
4230 } while (exception.retry);
4234 static int do_vfs_lock(struct file *file, struct file_lock *fl)
4237 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4239 res = posix_lock_file_wait(file, fl);
4242 res = flock_lock_file_wait(file, fl);
4250 struct nfs4_unlockdata {
4251 struct nfs_locku_args arg;
4252 struct nfs_locku_res res;
4253 struct nfs4_lock_state *lsp;
4254 struct nfs_open_context *ctx;
4255 struct file_lock fl;
4256 const struct nfs_server *server;
4257 unsigned long timestamp;
4260 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4261 struct nfs_open_context *ctx,
4262 struct nfs4_lock_state *lsp,
4263 struct nfs_seqid *seqid)
4265 struct nfs4_unlockdata *p;
4266 struct inode *inode = lsp->ls_state->inode;
4268 p = kzalloc(sizeof(*p), GFP_NOFS);
4271 p->arg.fh = NFS_FH(inode);
4273 p->arg.seqid = seqid;
4274 p->res.seqid = seqid;
4275 p->arg.stateid = &lsp->ls_stateid;
4277 atomic_inc(&lsp->ls_count);
4278 /* Ensure we don't close file until we're done freeing locks! */
4279 p->ctx = get_nfs_open_context(ctx);
4280 memcpy(&p->fl, fl, sizeof(p->fl));
4281 p->server = NFS_SERVER(inode);
4285 static void nfs4_locku_release_calldata(void *data)
4287 struct nfs4_unlockdata *calldata = data;
4288 nfs_free_seqid(calldata->arg.seqid);
4289 nfs4_put_lock_state(calldata->lsp);
4290 put_nfs_open_context(calldata->ctx);
4294 static void nfs4_locku_done(struct rpc_task *task, void *data)
4296 struct nfs4_unlockdata *calldata = data;
4298 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4300 switch (task->tk_status) {
4302 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4303 &calldata->res.stateid);
4304 renew_lease(calldata->server, calldata->timestamp);
4306 case -NFS4ERR_BAD_STATEID:
4307 case -NFS4ERR_OLD_STATEID:
4308 case -NFS4ERR_STALE_STATEID:
4309 case -NFS4ERR_EXPIRED:
4312 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
4313 rpc_restart_call_prepare(task);
4317 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
4319 struct nfs4_unlockdata *calldata = data;
4321 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
4323 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
4324 /* Note: exit _without_ running nfs4_locku_done */
4325 task->tk_action = NULL;
4328 calldata->timestamp = jiffies;
4329 if (nfs4_setup_sequence(calldata->server,
4330 &calldata->arg.seq_args,
4331 &calldata->res.seq_res, task))
4333 rpc_call_start(task);
4336 static const struct rpc_call_ops nfs4_locku_ops = {
4337 .rpc_call_prepare = nfs4_locku_prepare,
4338 .rpc_call_done = nfs4_locku_done,
4339 .rpc_release = nfs4_locku_release_calldata,
4342 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4343 struct nfs_open_context *ctx,
4344 struct nfs4_lock_state *lsp,
4345 struct nfs_seqid *seqid)
4347 struct nfs4_unlockdata *data;
4348 struct rpc_message msg = {
4349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4350 .rpc_cred = ctx->cred,
4352 struct rpc_task_setup task_setup_data = {
4353 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
4354 .rpc_message = &msg,
4355 .callback_ops = &nfs4_locku_ops,
4356 .workqueue = nfsiod_workqueue,
4357 .flags = RPC_TASK_ASYNC,
4360 /* Ensure this is an unlock - when canceling a lock, the
4361 * canceled lock is passed in, and it won't be an unlock.
4363 fl->fl_type = F_UNLCK;
4365 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4367 nfs_free_seqid(seqid);
4368 return ERR_PTR(-ENOMEM);
4371 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4372 msg.rpc_argp = &data->arg;
4373 msg.rpc_resp = &data->res;
4374 task_setup_data.callback_data = data;
4375 return rpc_run_task(&task_setup_data);
4378 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4380 struct nfs_inode *nfsi = NFS_I(state->inode);
4381 struct nfs_seqid *seqid;
4382 struct nfs4_lock_state *lsp;
4383 struct rpc_task *task;
4385 unsigned char fl_flags = request->fl_flags;
4387 status = nfs4_set_lock_state(state, request);
4388 /* Unlock _before_ we do the RPC call */
4389 request->fl_flags |= FL_EXISTS;
4390 down_read(&nfsi->rwsem);
4391 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4392 up_read(&nfsi->rwsem);
4395 up_read(&nfsi->rwsem);
4398 /* Is this a delegated lock? */
4399 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4401 lsp = request->fl_u.nfs4_fl.owner;
4402 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
4406 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
4407 status = PTR_ERR(task);
4410 status = nfs4_wait_for_completion_rpc_task(task);
4413 request->fl_flags = fl_flags;
4417 struct nfs4_lockdata {
4418 struct nfs_lock_args arg;
4419 struct nfs_lock_res res;
4420 struct nfs4_lock_state *lsp;
4421 struct nfs_open_context *ctx;
4422 struct file_lock fl;
4423 unsigned long timestamp;
4426 struct nfs_server *server;
4429 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
4430 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4433 struct nfs4_lockdata *p;
4434 struct inode *inode = lsp->ls_state->inode;
4435 struct nfs_server *server = NFS_SERVER(inode);
4437 p = kzalloc(sizeof(*p), gfp_mask);
4441 p->arg.fh = NFS_FH(inode);
4443 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
4444 if (p->arg.open_seqid == NULL)
4446 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
4447 if (p->arg.lock_seqid == NULL)
4448 goto out_free_seqid;
4449 p->arg.lock_stateid = &lsp->ls_stateid;
4450 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
4451 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
4452 p->arg.lock_owner.s_dev = server->s_dev;
4453 p->res.lock_seqid = p->arg.lock_seqid;
4456 atomic_inc(&lsp->ls_count);
4457 p->ctx = get_nfs_open_context(ctx);
4458 memcpy(&p->fl, fl, sizeof(p->fl));
4461 nfs_free_seqid(p->arg.open_seqid);
4467 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4469 struct nfs4_lockdata *data = calldata;
4470 struct nfs4_state *state = data->lsp->ls_state;
4472 dprintk("%s: begin!\n", __func__);
4473 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4475 /* Do we need to do an open_to_lock_owner? */
4476 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
4477 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
4479 data->arg.open_stateid = &state->stateid;
4480 data->arg.new_lock_owner = 1;
4481 data->res.open_seqid = data->arg.open_seqid;
4483 data->arg.new_lock_owner = 0;
4484 data->timestamp = jiffies;
4485 if (nfs4_setup_sequence(data->server,
4486 &data->arg.seq_args,
4487 &data->res.seq_res, task))
4489 rpc_call_start(task);
4490 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
4493 static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4495 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4496 nfs4_lock_prepare(task, calldata);
4499 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4501 struct nfs4_lockdata *data = calldata;
4503 dprintk("%s: begin!\n", __func__);
4505 if (!nfs4_sequence_done(task, &data->res.seq_res))
4508 data->rpc_status = task->tk_status;
4509 if (data->arg.new_lock_owner != 0) {
4510 if (data->rpc_status == 0)
4511 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4515 if (data->rpc_status == 0) {
4516 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
4517 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
4518 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
4521 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
4524 static void nfs4_lock_release(void *calldata)
4526 struct nfs4_lockdata *data = calldata;
4528 dprintk("%s: begin!\n", __func__);
4529 nfs_free_seqid(data->arg.open_seqid);
4530 if (data->cancelled != 0) {
4531 struct rpc_task *task;
4532 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4533 data->arg.lock_seqid);
4535 rpc_put_task_async(task);
4536 dprintk("%s: cancelling lock!\n", __func__);
4538 nfs_free_seqid(data->arg.lock_seqid);
4539 nfs4_put_lock_state(data->lsp);
4540 put_nfs_open_context(data->ctx);
4542 dprintk("%s: done!\n", __func__);
4545 static const struct rpc_call_ops nfs4_lock_ops = {
4546 .rpc_call_prepare = nfs4_lock_prepare,
4547 .rpc_call_done = nfs4_lock_done,
4548 .rpc_release = nfs4_lock_release,
4551 static const struct rpc_call_ops nfs4_recover_lock_ops = {
4552 .rpc_call_prepare = nfs4_recover_lock_prepare,
4553 .rpc_call_done = nfs4_lock_done,
4554 .rpc_release = nfs4_lock_release,
4557 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4560 case -NFS4ERR_ADMIN_REVOKED:
4561 case -NFS4ERR_BAD_STATEID:
4562 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4563 if (new_lock_owner != 0 ||
4564 (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
4565 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
4567 case -NFS4ERR_STALE_STATEID:
4568 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
4569 case -NFS4ERR_EXPIRED:
4570 nfs4_schedule_lease_recovery(server->nfs_client);
4574 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
4576 struct nfs4_lockdata *data;
4577 struct rpc_task *task;
4578 struct rpc_message msg = {
4579 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4580 .rpc_cred = state->owner->so_cred,
4582 struct rpc_task_setup task_setup_data = {
4583 .rpc_client = NFS_CLIENT(state->inode),
4584 .rpc_message = &msg,
4585 .callback_ops = &nfs4_lock_ops,
4586 .workqueue = nfsiod_workqueue,
4587 .flags = RPC_TASK_ASYNC,
4591 dprintk("%s: begin!\n", __func__);
4592 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
4593 fl->fl_u.nfs4_fl.owner,
4594 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
4598 data->arg.block = 1;
4599 if (recovery_type > NFS_LOCK_NEW) {
4600 if (recovery_type == NFS_LOCK_RECLAIM)
4601 data->arg.reclaim = NFS_LOCK_RECLAIM;
4602 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4604 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
4605 msg.rpc_argp = &data->arg;
4606 msg.rpc_resp = &data->res;
4607 task_setup_data.callback_data = data;
4608 task = rpc_run_task(&task_setup_data);
4610 return PTR_ERR(task);
4611 ret = nfs4_wait_for_completion_rpc_task(task);
4613 ret = data->rpc_status;
4615 nfs4_handle_setlk_error(data->server, data->lsp,
4616 data->arg.new_lock_owner, ret);
4618 data->cancelled = 1;
4620 dprintk("%s: done, ret = %d!\n", __func__, ret);
4624 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4626 struct nfs_server *server = NFS_SERVER(state->inode);
4627 struct nfs4_exception exception = {
4628 .inode = state->inode,
4633 /* Cache the lock if possible... */
4634 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4636 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
4637 if (err != -NFS4ERR_DELAY)
4639 nfs4_handle_exception(server, err, &exception);
4640 } while (exception.retry);
4644 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4646 struct nfs_server *server = NFS_SERVER(state->inode);
4647 struct nfs4_exception exception = {
4648 .inode = state->inode,
4652 err = nfs4_set_lock_state(state, request);
4656 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4658 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
4662 case -NFS4ERR_GRACE:
4663 case -NFS4ERR_DELAY:
4664 nfs4_handle_exception(server, err, &exception);
4667 } while (exception.retry);
4672 #if defined(CONFIG_NFS_V4_1)
4673 static int nfs41_check_expired_locks(struct nfs4_state *state)
4675 int status, ret = NFS_OK;
4676 struct nfs4_lock_state *lsp;
4677 struct nfs_server *server = NFS_SERVER(state->inode);
4679 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
4680 if (lsp->ls_flags & NFS_LOCK_INITIALIZED) {
4681 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4682 if (status != NFS_OK) {
4683 nfs41_free_stateid(server, &lsp->ls_stateid);
4684 lsp->ls_flags &= ~NFS_LOCK_INITIALIZED;
4693 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4695 int status = NFS_OK;
4697 if (test_bit(LK_STATE_IN_USE, &state->flags))
4698 status = nfs41_check_expired_locks(state);
4699 if (status == NFS_OK)
4701 return nfs4_lock_expired(state, request);
4705 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4707 struct nfs_inode *nfsi = NFS_I(state->inode);
4708 unsigned char fl_flags = request->fl_flags;
4709 int status = -ENOLCK;
4711 if ((fl_flags & FL_POSIX) &&
4712 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4714 /* Is this a delegated open? */
4715 status = nfs4_set_lock_state(state, request);
4718 request->fl_flags |= FL_ACCESS;
4719 status = do_vfs_lock(request->fl_file, request);
4722 down_read(&nfsi->rwsem);
4723 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
4724 /* Yes: cache locks! */
4725 /* ...but avoid races with delegation recall... */
4726 request->fl_flags = fl_flags & ~FL_SLEEP;
4727 status = do_vfs_lock(request->fl_file, request);
4730 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
4733 /* Note: we always want to sleep here! */
4734 request->fl_flags = fl_flags | FL_SLEEP;
4735 if (do_vfs_lock(request->fl_file, request) < 0)
4736 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4737 "manager!\n", __func__);
4739 up_read(&nfsi->rwsem);
4741 request->fl_flags = fl_flags;
4745 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4747 struct nfs4_exception exception = {
4749 .inode = state->inode,
4754 err = _nfs4_proc_setlk(state, cmd, request);
4755 if (err == -NFS4ERR_DENIED)
4757 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4759 } while (exception.retry);
4764 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4766 struct nfs_open_context *ctx;
4767 struct nfs4_state *state;
4768 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4771 /* verify open state */
4772 ctx = nfs_file_open_context(filp);
4775 if (request->fl_start < 0 || request->fl_end < 0)
4778 if (IS_GETLK(cmd)) {
4780 return nfs4_proc_getlk(state, F_GETLK, request);
4784 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4787 if (request->fl_type == F_UNLCK) {
4789 return nfs4_proc_unlck(state, cmd, request);
4796 * Don't rely on the VFS having checked the file open mode,
4797 * since it won't do this for flock() locks.
4799 switch (request->fl_type & (F_RDLCK|F_WRLCK|F_UNLCK)) {
4801 if (!(filp->f_mode & FMODE_READ))
4805 if (!(filp->f_mode & FMODE_WRITE))
4810 status = nfs4_proc_setlk(state, cmd, request);
4811 if ((status != -EAGAIN) || IS_SETLK(cmd))
4813 timeout = nfs4_set_lock_task_retry(timeout);
4814 status = -ERESTARTSYS;
4817 } while(status < 0);
4821 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4823 struct nfs_server *server = NFS_SERVER(state->inode);
4824 struct nfs4_exception exception = { };
4827 err = nfs4_set_lock_state(state, fl);
4831 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
4834 printk(KERN_ERR "NFS: %s: unhandled error "
4835 "%d.\n", __func__, err);
4839 case -NFS4ERR_EXPIRED:
4840 nfs4_schedule_stateid_recovery(server, state);
4841 case -NFS4ERR_STALE_CLIENTID:
4842 case -NFS4ERR_STALE_STATEID:
4843 nfs4_schedule_lease_recovery(server->nfs_client);
4845 case -NFS4ERR_BADSESSION:
4846 case -NFS4ERR_BADSLOT:
4847 case -NFS4ERR_BAD_HIGH_SLOT:
4848 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4849 case -NFS4ERR_DEADSESSION:
4850 nfs4_schedule_session_recovery(server->nfs_client->cl_session);
4854 * The show must go on: exit, but mark the
4855 * stateid as needing recovery.
4857 case -NFS4ERR_DELEG_REVOKED:
4858 case -NFS4ERR_ADMIN_REVOKED:
4859 case -NFS4ERR_BAD_STATEID:
4860 case -NFS4ERR_OPENMODE:
4861 nfs4_schedule_stateid_recovery(server, state);
4866 * User RPCSEC_GSS context has expired.
4867 * We cannot recover this stateid now, so
4868 * skip it and allow recovery thread to
4874 case -NFS4ERR_DENIED:
4875 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4878 case -NFS4ERR_DELAY:
4881 err = nfs4_handle_exception(server, err, &exception);
4882 } while (exception.retry);
4887 struct nfs_release_lockowner_data {
4888 struct nfs4_lock_state *lsp;
4889 struct nfs_server *server;
4890 struct nfs_release_lockowner_args args;
4893 static void nfs4_release_lockowner_release(void *calldata)
4895 struct nfs_release_lockowner_data *data = calldata;
4896 nfs4_free_lock_state(data->server, data->lsp);
4900 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
4901 .rpc_release = nfs4_release_lockowner_release,
4904 int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
4906 struct nfs_server *server = lsp->ls_state->owner->so_server;
4907 struct nfs_release_lockowner_data *data;
4908 struct rpc_message msg = {
4909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
4912 if (server->nfs_client->cl_mvops->minor_version != 0)
4914 data = kmalloc(sizeof(*data), GFP_NOFS);
4918 data->server = server;
4919 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
4920 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
4921 data->args.lock_owner.s_dev = server->s_dev;
4922 msg.rpc_argp = &data->args;
4923 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
4927 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
4929 static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
4930 const void *buf, size_t buflen,
4931 int flags, int type)
4933 if (strcmp(key, "") != 0)
4936 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
4939 static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
4940 void *buf, size_t buflen, int type)
4942 if (strcmp(key, "") != 0)
4945 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
4948 static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
4949 size_t list_len, const char *name,
4950 size_t name_len, int type)
4952 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
4954 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
4957 if (list && len <= list_len)
4958 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
4963 * nfs_fhget will use either the mounted_on_fileid or the fileid
4965 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
4967 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
4968 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
4969 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
4970 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
4973 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
4974 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
4975 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
4979 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
4980 const struct qstr *name,
4981 struct nfs4_fs_locations *fs_locations,
4984 struct nfs_server *server = NFS_SERVER(dir);
4986 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
4988 struct nfs4_fs_locations_arg args = {
4989 .dir_fh = NFS_FH(dir),
4994 struct nfs4_fs_locations_res res = {
4995 .fs_locations = fs_locations,
4997 struct rpc_message msg = {
4998 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5004 dprintk("%s: start\n", __func__);
5006 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5007 * is not supported */
5008 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5009 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5011 bitmask[0] |= FATTR4_WORD0_FILEID;
5013 nfs_fattr_init(&fs_locations->fattr);
5014 fs_locations->server = server;
5015 fs_locations->nlocations = 0;
5016 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
5017 dprintk("%s: returned status = %d\n", __func__, status);
5021 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5022 const struct qstr *name,
5023 struct nfs4_fs_locations *fs_locations,
5026 struct nfs4_exception exception = { };
5029 err = nfs4_handle_exception(NFS_SERVER(dir),
5030 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
5032 } while (exception.retry);
5036 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5039 struct nfs4_secinfo_arg args = {
5040 .dir_fh = NFS_FH(dir),
5043 struct nfs4_secinfo_res res = {
5046 struct rpc_message msg = {
5047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5052 dprintk("NFS call secinfo %s\n", name->name);
5053 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5054 dprintk("NFS reply secinfo: %d\n", status);
5058 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5059 struct nfs4_secinfo_flavors *flavors)
5061 struct nfs4_exception exception = { };
5064 err = nfs4_handle_exception(NFS_SERVER(dir),
5065 _nfs4_proc_secinfo(dir, name, flavors),
5067 } while (exception.retry);
5071 #ifdef CONFIG_NFS_V4_1
5073 * Check the exchange flags returned by the server for invalid flags, having
5074 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5077 static int nfs4_check_cl_exchange_flags(u32 flags)
5079 if (flags & ~EXCHGID4_FLAG_MASK_R)
5081 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5082 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5084 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5088 return -NFS4ERR_INVAL;
5092 nfs41_same_server_scope(struct nfs41_server_scope *a,
5093 struct nfs41_server_scope *b)
5095 if (a->server_scope_sz == b->server_scope_sz &&
5096 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5103 * nfs4_proc_bind_conn_to_session()
5105 * The 4.1 client currently uses the same TCP connection for the
5106 * fore and backchannel.
5108 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp)
5111 struct nfs41_bind_conn_to_session_res res;
5112 struct rpc_message msg = {
5114 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5119 dprintk("--> %s\n", __func__);
5120 BUG_ON(clp == NULL);
5122 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5123 if (unlikely(res.session == NULL)) {
5128 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5130 if (memcmp(res.session->sess_id.data,
5131 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5132 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5136 if (res.dir != NFS4_CDFS4_BOTH) {
5137 dprintk("NFS: %s: Unexpected direction from server\n",
5142 if (res.use_conn_in_rdma_mode) {
5143 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5152 dprintk("<-- %s status= %d\n", __func__, status);
5157 * nfs4_proc_exchange_id()
5159 * Since the clientid has expired, all compounds using sessions
5160 * associated with the stale clientid will be returning
5161 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5162 * be in some phase of session reset.
5164 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
5166 nfs4_verifier verifier;
5167 struct nfs41_exchange_id_args args = {
5168 .verifier = &verifier,
5170 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
5172 struct nfs41_exchange_id_res res = {
5176 struct rpc_message msg = {
5177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5183 dprintk("--> %s\n", __func__);
5184 BUG_ON(clp == NULL);
5186 nfs4_init_boot_verifier(clp, &verifier);
5188 args.id_len = scnprintf(args.id, sizeof(args.id),
5191 clp->cl_rpcclient->cl_nodename,
5192 clp->cl_rpcclient->cl_auth->au_flavor);
5194 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
5196 if (unlikely(res.server_owner == NULL)) {
5201 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
5203 if (unlikely(res.server_scope == NULL)) {
5205 goto out_server_owner;
5208 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
5209 if (unlikely(res.impl_id == NULL)) {
5211 goto out_server_scope;
5214 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5216 status = nfs4_check_cl_exchange_flags(clp->cl_exchange_flags);
5219 kfree(clp->cl_serverowner);
5220 clp->cl_serverowner = res.server_owner;
5221 res.server_owner = NULL;
5225 /* use the most recent implementation id */
5226 kfree(clp->cl_implid);
5227 clp->cl_implid = res.impl_id;
5232 if (clp->cl_serverscope != NULL &&
5233 !nfs41_same_server_scope(clp->cl_serverscope,
5234 res.server_scope)) {
5235 dprintk("%s: server_scope mismatch detected\n",
5237 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
5238 kfree(clp->cl_serverscope);
5239 clp->cl_serverscope = NULL;
5242 if (clp->cl_serverscope == NULL) {
5243 clp->cl_serverscope = res.server_scope;
5249 kfree(res.server_owner);
5251 kfree(res.server_scope);
5253 if (clp->cl_implid != NULL)
5254 dprintk("%s: Server Implementation ID: "
5255 "domain: %s, name: %s, date: %llu,%u\n",
5256 __func__, clp->cl_implid->domain, clp->cl_implid->name,
5257 clp->cl_implid->date.seconds,
5258 clp->cl_implid->date.nseconds);
5259 dprintk("<-- %s status= %d\n", __func__, status);
5263 struct nfs4_get_lease_time_data {
5264 struct nfs4_get_lease_time_args *args;
5265 struct nfs4_get_lease_time_res *res;
5266 struct nfs_client *clp;
5269 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5273 struct nfs4_get_lease_time_data *data =
5274 (struct nfs4_get_lease_time_data *)calldata;
5276 dprintk("--> %s\n", __func__);
5277 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5278 /* just setup sequence, do not trigger session recovery
5279 since we're invoked within one */
5280 ret = nfs41_setup_sequence(data->clp->cl_session,
5281 &data->args->la_seq_args,
5282 &data->res->lr_seq_res, task);
5284 BUG_ON(ret == -EAGAIN);
5285 rpc_call_start(task);
5286 dprintk("<-- %s\n", __func__);
5290 * Called from nfs4_state_manager thread for session setup, so don't recover
5291 * from sequence operation or clientid errors.
5293 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5295 struct nfs4_get_lease_time_data *data =
5296 (struct nfs4_get_lease_time_data *)calldata;
5298 dprintk("--> %s\n", __func__);
5299 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5301 switch (task->tk_status) {
5302 case -NFS4ERR_DELAY:
5303 case -NFS4ERR_GRACE:
5304 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5305 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5306 task->tk_status = 0;
5308 case -NFS4ERR_RETRY_UNCACHED_REP:
5309 rpc_restart_call_prepare(task);
5312 dprintk("<-- %s\n", __func__);
5315 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
5316 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5317 .rpc_call_done = nfs4_get_lease_time_done,
5320 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5322 struct rpc_task *task;
5323 struct nfs4_get_lease_time_args args;
5324 struct nfs4_get_lease_time_res res = {
5325 .lr_fsinfo = fsinfo,
5327 struct nfs4_get_lease_time_data data = {
5332 struct rpc_message msg = {
5333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5337 struct rpc_task_setup task_setup = {
5338 .rpc_client = clp->cl_rpcclient,
5339 .rpc_message = &msg,
5340 .callback_ops = &nfs4_get_lease_time_ops,
5341 .callback_data = &data,
5342 .flags = RPC_TASK_TIMEOUT,
5346 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
5347 dprintk("--> %s\n", __func__);
5348 task = rpc_run_task(&task_setup);
5351 status = PTR_ERR(task);
5353 status = task->tk_status;
5356 dprintk("<-- %s return %d\n", __func__, status);
5361 static struct nfs4_slot *nfs4_alloc_slots(u32 max_slots, gfp_t gfp_flags)
5363 return kcalloc(max_slots, sizeof(struct nfs4_slot), gfp_flags);
5366 static void nfs4_add_and_init_slots(struct nfs4_slot_table *tbl,
5367 struct nfs4_slot *new,
5371 struct nfs4_slot *old = NULL;
5374 spin_lock(&tbl->slot_tbl_lock);
5378 tbl->max_slots = max_slots;
5380 tbl->highest_used_slotid = -1; /* no slot is currently used */
5381 for (i = 0; i < tbl->max_slots; i++)
5382 tbl->slots[i].seq_nr = ivalue;
5383 spin_unlock(&tbl->slot_tbl_lock);
5388 * (re)Initialise a slot table
5390 static int nfs4_realloc_slot_table(struct nfs4_slot_table *tbl, u32 max_reqs,
5393 struct nfs4_slot *new = NULL;
5396 dprintk("--> %s: max_reqs=%u, tbl->max_slots %d\n", __func__,
5397 max_reqs, tbl->max_slots);
5399 /* Does the newly negotiated max_reqs match the existing slot table? */
5400 if (max_reqs != tbl->max_slots) {
5401 new = nfs4_alloc_slots(max_reqs, GFP_NOFS);
5407 nfs4_add_and_init_slots(tbl, new, max_reqs, ivalue);
5408 dprintk("%s: tbl=%p slots=%p max_slots=%d\n", __func__,
5409 tbl, tbl->slots, tbl->max_slots);
5411 dprintk("<-- %s: return %d\n", __func__, ret);
5415 /* Destroy the slot table */
5416 static void nfs4_destroy_slot_tables(struct nfs4_session *session)
5418 if (session->fc_slot_table.slots != NULL) {
5419 kfree(session->fc_slot_table.slots);
5420 session->fc_slot_table.slots = NULL;
5422 if (session->bc_slot_table.slots != NULL) {
5423 kfree(session->bc_slot_table.slots);
5424 session->bc_slot_table.slots = NULL;
5430 * Initialize or reset the forechannel and backchannel tables
5432 static int nfs4_setup_session_slot_tables(struct nfs4_session *ses)
5434 struct nfs4_slot_table *tbl;
5437 dprintk("--> %s\n", __func__);
5439 tbl = &ses->fc_slot_table;
5440 status = nfs4_realloc_slot_table(tbl, ses->fc_attrs.max_reqs, 1);
5441 if (status) /* -ENOMEM */
5444 tbl = &ses->bc_slot_table;
5445 status = nfs4_realloc_slot_table(tbl, ses->bc_attrs.max_reqs, 0);
5446 if (status && tbl->slots == NULL)
5447 /* Fore and back channel share a connection so get
5448 * both slot tables or neither */
5449 nfs4_destroy_slot_tables(ses);
5453 struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp)
5455 struct nfs4_session *session;
5456 struct nfs4_slot_table *tbl;
5458 session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5462 tbl = &session->fc_slot_table;
5463 tbl->highest_used_slotid = NFS4_NO_SLOT;
5464 spin_lock_init(&tbl->slot_tbl_lock);
5465 rpc_init_priority_wait_queue(&tbl->slot_tbl_waitq, "ForeChannel Slot table");
5466 init_completion(&tbl->complete);
5468 tbl = &session->bc_slot_table;
5469 tbl->highest_used_slotid = NFS4_NO_SLOT;
5470 spin_lock_init(&tbl->slot_tbl_lock);
5471 rpc_init_wait_queue(&tbl->slot_tbl_waitq, "BackChannel Slot table");
5472 init_completion(&tbl->complete);
5474 session->session_state = 1<<NFS4_SESSION_INITING;
5480 void nfs4_destroy_session(struct nfs4_session *session)
5482 struct rpc_xprt *xprt;
5484 nfs4_proc_destroy_session(session);
5487 xprt = rcu_dereference(session->clp->cl_rpcclient->cl_xprt);
5489 dprintk("%s Destroy backchannel for xprt %p\n",
5491 xprt_destroy_backchannel(xprt, NFS41_BC_MIN_CALLBACKS);
5492 nfs4_destroy_slot_tables(session);
5497 * Initialize the values to be used by the client in CREATE_SESSION
5498 * If nfs4_init_session set the fore channel request and response sizes,
5501 * Set the back channel max_resp_sz_cached to zero to force the client to
5502 * always set csa_cachethis to FALSE because the current implementation
5503 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5505 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5507 struct nfs4_session *session = args->client->cl_session;
5508 unsigned int mxrqst_sz = session->fc_attrs.max_rqst_sz,
5509 mxresp_sz = session->fc_attrs.max_resp_sz;
5512 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5514 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5515 /* Fore channel attributes */
5516 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5517 args->fc_attrs.max_resp_sz = mxresp_sz;
5518 args->fc_attrs.max_ops = NFS4_MAX_OPS;
5519 args->fc_attrs.max_reqs = max_session_slots;
5521 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
5522 "max_ops=%u max_reqs=%u\n",
5524 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
5525 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
5527 /* Back channel attributes */
5528 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5529 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5530 args->bc_attrs.max_resp_sz_cached = 0;
5531 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5532 args->bc_attrs.max_reqs = 1;
5534 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5535 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5537 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5538 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5539 args->bc_attrs.max_reqs);
5542 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5544 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5545 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5547 if (rcvd->max_resp_sz > sent->max_resp_sz)
5550 * Our requested max_ops is the minimum we need; we're not
5551 * prepared to break up compounds into smaller pieces than that.
5552 * So, no point even trying to continue if the server won't
5555 if (rcvd->max_ops < sent->max_ops)
5557 if (rcvd->max_reqs == 0)
5559 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5560 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
5564 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5566 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5567 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
5569 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5571 if (rcvd->max_resp_sz < sent->max_resp_sz)
5573 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5575 /* These would render the backchannel useless: */
5576 if (rcvd->max_ops != sent->max_ops)
5578 if (rcvd->max_reqs != sent->max_reqs)
5583 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5584 struct nfs4_session *session)
5588 ret = nfs4_verify_fore_channel_attrs(args, session);
5591 return nfs4_verify_back_channel_attrs(args, session);
5594 static int _nfs4_proc_create_session(struct nfs_client *clp)
5596 struct nfs4_session *session = clp->cl_session;
5597 struct nfs41_create_session_args args = {
5599 .cb_program = NFS4_CALLBACK,
5601 struct nfs41_create_session_res res = {
5604 struct rpc_message msg = {
5605 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5611 nfs4_init_channel_attrs(&args);
5612 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
5614 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5617 /* Verify the session's negotiated channel_attrs values */
5618 status = nfs4_verify_channel_attrs(&args, session);
5620 /* Increment the clientid slot sequence id */
5628 * Issues a CREATE_SESSION operation to the server.
5629 * It is the responsibility of the caller to verify the session is
5630 * expired before calling this routine.
5632 int nfs4_proc_create_session(struct nfs_client *clp)
5636 struct nfs4_session *session = clp->cl_session;
5638 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5640 status = _nfs4_proc_create_session(clp);
5644 /* Init or reset the session slot tables */
5645 status = nfs4_setup_session_slot_tables(session);
5646 dprintk("slot table setup returned %d\n", status);
5650 ptr = (unsigned *)&session->sess_id.data[0];
5651 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5652 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
5654 dprintk("<-- %s\n", __func__);
5659 * Issue the over-the-wire RPC DESTROY_SESSION.
5660 * The caller must serialize access to this routine.
5662 int nfs4_proc_destroy_session(struct nfs4_session *session)
5665 struct rpc_message msg;
5667 dprintk("--> nfs4_proc_destroy_session\n");
5669 /* session is still being setup */
5670 if (session->clp->cl_cons_state != NFS_CS_READY)
5673 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION];
5674 msg.rpc_argp = session;
5675 msg.rpc_resp = NULL;
5676 msg.rpc_cred = NULL;
5677 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5681 "NFS: Got error %d from the server on DESTROY_SESSION. "
5682 "Session has been destroyed regardless...\n", status);
5684 dprintk("<-- nfs4_proc_destroy_session\n");
5689 * With sessions, the client is not marked ready until after a
5690 * successful EXCHANGE_ID and CREATE_SESSION.
5692 * Map errors cl_cons_state errors to EPROTONOSUPPORT to indicate
5693 * other versions of NFS can be tried.
5695 static int nfs41_check_session_ready(struct nfs_client *clp)
5699 if (clp->cl_cons_state == NFS_CS_SESSION_INITING) {
5700 ret = nfs4_client_recover_expired_lease(clp);
5704 if (clp->cl_cons_state < NFS_CS_READY)
5705 return -EPROTONOSUPPORT;
5710 int nfs4_init_session(struct nfs_server *server)
5712 struct nfs_client *clp = server->nfs_client;
5713 struct nfs4_session *session;
5714 unsigned int rsize, wsize;
5716 if (!nfs4_has_session(clp))
5719 session = clp->cl_session;
5720 spin_lock(&clp->cl_lock);
5721 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5723 rsize = server->rsize;
5725 rsize = NFS_MAX_FILE_IO_SIZE;
5726 wsize = server->wsize;
5728 wsize = NFS_MAX_FILE_IO_SIZE;
5730 session->fc_attrs.max_rqst_sz = wsize + nfs41_maxwrite_overhead;
5731 session->fc_attrs.max_resp_sz = rsize + nfs41_maxread_overhead;
5733 spin_unlock(&clp->cl_lock);
5735 return nfs41_check_session_ready(clp);
5738 int nfs4_init_ds_session(struct nfs_client *clp, unsigned long lease_time)
5740 struct nfs4_session *session = clp->cl_session;
5743 spin_lock(&clp->cl_lock);
5744 if (test_and_clear_bit(NFS4_SESSION_INITING, &session->session_state)) {
5746 * Do not set NFS_CS_CHECK_LEASE_TIME instead set the
5747 * DS lease to be equal to the MDS lease.
5749 clp->cl_lease_time = lease_time;
5750 clp->cl_last_renewal = jiffies;
5752 spin_unlock(&clp->cl_lock);
5754 ret = nfs41_check_session_ready(clp);
5757 /* Test for the DS role */
5758 if (!is_ds_client(clp))
5762 EXPORT_SYMBOL_GPL(nfs4_init_ds_session);
5766 * Renew the cl_session lease.
5768 struct nfs4_sequence_data {
5769 struct nfs_client *clp;
5770 struct nfs4_sequence_args args;
5771 struct nfs4_sequence_res res;
5774 static void nfs41_sequence_release(void *data)
5776 struct nfs4_sequence_data *calldata = data;
5777 struct nfs_client *clp = calldata->clp;
5779 if (atomic_read(&clp->cl_count) > 1)
5780 nfs4_schedule_state_renewal(clp);
5781 nfs_put_client(clp);
5785 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5787 switch(task->tk_status) {
5788 case -NFS4ERR_DELAY:
5789 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5792 nfs4_schedule_lease_recovery(clp);
5797 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
5799 struct nfs4_sequence_data *calldata = data;
5800 struct nfs_client *clp = calldata->clp;
5802 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5805 if (task->tk_status < 0) {
5806 dprintk("%s ERROR %d\n", __func__, task->tk_status);
5807 if (atomic_read(&clp->cl_count) == 1)
5810 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5811 rpc_restart_call_prepare(task);
5815 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
5817 dprintk("<-- %s\n", __func__);
5820 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5822 struct nfs4_sequence_data *calldata = data;
5823 struct nfs_client *clp = calldata->clp;
5824 struct nfs4_sequence_args *args;
5825 struct nfs4_sequence_res *res;
5827 args = task->tk_msg.rpc_argp;
5828 res = task->tk_msg.rpc_resp;
5830 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
5832 rpc_call_start(task);
5835 static const struct rpc_call_ops nfs41_sequence_ops = {
5836 .rpc_call_done = nfs41_sequence_call_done,
5837 .rpc_call_prepare = nfs41_sequence_prepare,
5838 .rpc_release = nfs41_sequence_release,
5841 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5843 struct nfs4_sequence_data *calldata;
5844 struct rpc_message msg = {
5845 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5848 struct rpc_task_setup task_setup_data = {
5849 .rpc_client = clp->cl_rpcclient,
5850 .rpc_message = &msg,
5851 .callback_ops = &nfs41_sequence_ops,
5852 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5855 if (!atomic_inc_not_zero(&clp->cl_count))
5856 return ERR_PTR(-EIO);
5857 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5858 if (calldata == NULL) {
5859 nfs_put_client(clp);
5860 return ERR_PTR(-ENOMEM);
5862 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
5863 msg.rpc_argp = &calldata->args;
5864 msg.rpc_resp = &calldata->res;
5865 calldata->clp = clp;
5866 task_setup_data.callback_data = calldata;
5868 return rpc_run_task(&task_setup_data);
5871 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
5873 struct rpc_task *task;
5876 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5878 task = _nfs41_proc_sequence(clp, cred);
5880 ret = PTR_ERR(task);
5882 rpc_put_task_async(task);
5883 dprintk("<-- %s status=%d\n", __func__, ret);
5887 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5889 struct rpc_task *task;
5892 task = _nfs41_proc_sequence(clp, cred);
5894 ret = PTR_ERR(task);
5897 ret = rpc_wait_for_completion_task(task);
5899 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5901 if (task->tk_status == 0)
5902 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
5903 ret = task->tk_status;
5907 dprintk("<-- %s status=%d\n", __func__, ret);
5911 struct nfs4_reclaim_complete_data {
5912 struct nfs_client *clp;
5913 struct nfs41_reclaim_complete_args arg;
5914 struct nfs41_reclaim_complete_res res;
5917 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5919 struct nfs4_reclaim_complete_data *calldata = data;
5921 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5922 if (nfs41_setup_sequence(calldata->clp->cl_session,
5923 &calldata->arg.seq_args,
5924 &calldata->res.seq_res, task))
5927 rpc_call_start(task);
5930 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5932 switch(task->tk_status) {
5934 case -NFS4ERR_COMPLETE_ALREADY:
5935 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5937 case -NFS4ERR_DELAY:
5938 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5940 case -NFS4ERR_RETRY_UNCACHED_REP:
5943 nfs4_schedule_lease_recovery(clp);
5948 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5950 struct nfs4_reclaim_complete_data *calldata = data;
5951 struct nfs_client *clp = calldata->clp;
5952 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5954 dprintk("--> %s\n", __func__);
5955 if (!nfs41_sequence_done(task, res))
5958 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5959 rpc_restart_call_prepare(task);
5962 dprintk("<-- %s\n", __func__);
5965 static void nfs4_free_reclaim_complete_data(void *data)
5967 struct nfs4_reclaim_complete_data *calldata = data;
5972 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5973 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5974 .rpc_call_done = nfs4_reclaim_complete_done,
5975 .rpc_release = nfs4_free_reclaim_complete_data,
5979 * Issue a global reclaim complete.
5981 static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5983 struct nfs4_reclaim_complete_data *calldata;
5984 struct rpc_task *task;
5985 struct rpc_message msg = {
5986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5988 struct rpc_task_setup task_setup_data = {
5989 .rpc_client = clp->cl_rpcclient,
5990 .rpc_message = &msg,
5991 .callback_ops = &nfs4_reclaim_complete_call_ops,
5992 .flags = RPC_TASK_ASYNC,
5994 int status = -ENOMEM;
5996 dprintk("--> %s\n", __func__);
5997 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
5998 if (calldata == NULL)
6000 calldata->clp = clp;
6001 calldata->arg.one_fs = 0;
6003 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
6004 msg.rpc_argp = &calldata->arg;
6005 msg.rpc_resp = &calldata->res;
6006 task_setup_data.callback_data = calldata;
6007 task = rpc_run_task(&task_setup_data);
6009 status = PTR_ERR(task);
6012 status = nfs4_wait_for_completion_rpc_task(task);
6014 status = task->tk_status;
6018 dprintk("<-- %s status=%d\n", __func__, status);
6023 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6025 struct nfs4_layoutget *lgp = calldata;
6026 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6028 dprintk("--> %s\n", __func__);
6029 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6030 * right now covering the LAYOUTGET we are about to send.
6031 * However, that is not so catastrophic, and there seems
6032 * to be no way to prevent it completely.
6034 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
6035 &lgp->res.seq_res, task))
6037 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6038 NFS_I(lgp->args.inode)->layout,
6039 lgp->args.ctx->state)) {
6040 rpc_exit(task, NFS4_OK);
6043 rpc_call_start(task);
6046 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6048 struct nfs4_layoutget *lgp = calldata;
6049 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6051 dprintk("--> %s\n", __func__);
6053 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
6056 switch (task->tk_status) {
6059 case -NFS4ERR_LAYOUTTRYLATER:
6060 case -NFS4ERR_RECALLCONFLICT:
6061 task->tk_status = -NFS4ERR_DELAY;
6064 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6065 rpc_restart_call_prepare(task);
6069 dprintk("<-- %s\n", __func__);
6072 static void nfs4_layoutget_release(void *calldata)
6074 struct nfs4_layoutget *lgp = calldata;
6076 dprintk("--> %s\n", __func__);
6077 put_nfs_open_context(lgp->args.ctx);
6079 dprintk("<-- %s\n", __func__);
6082 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6083 .rpc_call_prepare = nfs4_layoutget_prepare,
6084 .rpc_call_done = nfs4_layoutget_done,
6085 .rpc_release = nfs4_layoutget_release,
6088 int nfs4_proc_layoutget(struct nfs4_layoutget *lgp)
6090 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6091 struct rpc_task *task;
6092 struct rpc_message msg = {
6093 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6094 .rpc_argp = &lgp->args,
6095 .rpc_resp = &lgp->res,
6097 struct rpc_task_setup task_setup_data = {
6098 .rpc_client = server->client,
6099 .rpc_message = &msg,
6100 .callback_ops = &nfs4_layoutget_call_ops,
6101 .callback_data = lgp,
6102 .flags = RPC_TASK_ASYNC,
6106 dprintk("--> %s\n", __func__);
6108 lgp->res.layoutp = &lgp->args.layout;
6109 lgp->res.seq_res.sr_slot = NULL;
6110 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
6111 task = rpc_run_task(&task_setup_data);
6113 return PTR_ERR(task);
6114 status = nfs4_wait_for_completion_rpc_task(task);
6116 status = task->tk_status;
6118 status = pnfs_layout_process(lgp);
6120 dprintk("<-- %s status=%d\n", __func__, status);
6125 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6127 struct nfs4_layoutreturn *lrp = calldata;
6129 dprintk("--> %s\n", __func__);
6130 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
6131 &lrp->res.seq_res, task))
6133 rpc_call_start(task);
6136 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6138 struct nfs4_layoutreturn *lrp = calldata;
6139 struct nfs_server *server;
6140 struct pnfs_layout_hdr *lo = lrp->args.layout;
6142 dprintk("--> %s\n", __func__);
6144 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6147 server = NFS_SERVER(lrp->args.inode);
6148 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6149 rpc_restart_call_prepare(task);
6152 spin_lock(&lo->plh_inode->i_lock);
6153 if (task->tk_status == 0) {
6154 if (lrp->res.lrs_present) {
6155 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6157 BUG_ON(!list_empty(&lo->plh_segs));
6159 lo->plh_block_lgets--;
6160 spin_unlock(&lo->plh_inode->i_lock);
6161 dprintk("<-- %s\n", __func__);
6164 static void nfs4_layoutreturn_release(void *calldata)
6166 struct nfs4_layoutreturn *lrp = calldata;
6168 dprintk("--> %s\n", __func__);
6169 put_layout_hdr(lrp->args.layout);
6171 dprintk("<-- %s\n", __func__);
6174 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6175 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6176 .rpc_call_done = nfs4_layoutreturn_done,
6177 .rpc_release = nfs4_layoutreturn_release,
6180 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6182 struct rpc_task *task;
6183 struct rpc_message msg = {
6184 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6185 .rpc_argp = &lrp->args,
6186 .rpc_resp = &lrp->res,
6188 struct rpc_task_setup task_setup_data = {
6189 .rpc_client = lrp->clp->cl_rpcclient,
6190 .rpc_message = &msg,
6191 .callback_ops = &nfs4_layoutreturn_call_ops,
6192 .callback_data = lrp,
6196 dprintk("--> %s\n", __func__);
6197 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
6198 task = rpc_run_task(&task_setup_data);
6200 return PTR_ERR(task);
6201 status = task->tk_status;
6202 dprintk("<-- %s status=%d\n", __func__, status);
6208 * Retrieve the list of Data Server devices from the MDS.
6210 static int _nfs4_getdevicelist(struct nfs_server *server,
6211 const struct nfs_fh *fh,
6212 struct pnfs_devicelist *devlist)
6214 struct nfs4_getdevicelist_args args = {
6216 .layoutclass = server->pnfs_curr_ld->id,
6218 struct nfs4_getdevicelist_res res = {
6221 struct rpc_message msg = {
6222 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6228 dprintk("--> %s\n", __func__);
6229 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6231 dprintk("<-- %s status=%d\n", __func__, status);
6235 int nfs4_proc_getdevicelist(struct nfs_server *server,
6236 const struct nfs_fh *fh,
6237 struct pnfs_devicelist *devlist)
6239 struct nfs4_exception exception = { };
6243 err = nfs4_handle_exception(server,
6244 _nfs4_getdevicelist(server, fh, devlist),
6246 } while (exception.retry);
6248 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6249 err, devlist->num_devs);
6253 EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6256 _nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6258 struct nfs4_getdeviceinfo_args args = {
6261 struct nfs4_getdeviceinfo_res res = {
6264 struct rpc_message msg = {
6265 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6271 dprintk("--> %s\n", __func__);
6272 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6273 dprintk("<-- %s status=%d\n", __func__, status);
6278 int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6280 struct nfs4_exception exception = { };
6284 err = nfs4_handle_exception(server,
6285 _nfs4_proc_getdeviceinfo(server, pdev),
6287 } while (exception.retry);
6290 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6292 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6294 struct nfs4_layoutcommit_data *data = calldata;
6295 struct nfs_server *server = NFS_SERVER(data->args.inode);
6297 if (nfs4_setup_sequence(server, &data->args.seq_args,
6298 &data->res.seq_res, task))
6300 rpc_call_start(task);
6304 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6306 struct nfs4_layoutcommit_data *data = calldata;
6307 struct nfs_server *server = NFS_SERVER(data->args.inode);
6309 if (!nfs4_sequence_done(task, &data->res.seq_res))
6312 switch (task->tk_status) { /* Just ignore these failures */
6313 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6314 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6315 case -NFS4ERR_BADLAYOUT: /* no layout */
6316 case -NFS4ERR_GRACE: /* loca_recalim always false */
6317 task->tk_status = 0;
6320 nfs_post_op_update_inode_force_wcc(data->args.inode,
6324 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6325 rpc_restart_call_prepare(task);
6331 static void nfs4_layoutcommit_release(void *calldata)
6333 struct nfs4_layoutcommit_data *data = calldata;
6334 struct pnfs_layout_segment *lseg, *tmp;
6335 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
6337 pnfs_cleanup_layoutcommit(data);
6338 /* Matched by references in pnfs_set_layoutcommit */
6339 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6340 list_del_init(&lseg->pls_lc_list);
6341 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6346 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6347 smp_mb__after_clear_bit();
6348 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6350 put_rpccred(data->cred);
6354 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6355 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6356 .rpc_call_done = nfs4_layoutcommit_done,
6357 .rpc_release = nfs4_layoutcommit_release,
6361 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
6363 struct rpc_message msg = {
6364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6365 .rpc_argp = &data->args,
6366 .rpc_resp = &data->res,
6367 .rpc_cred = data->cred,
6369 struct rpc_task_setup task_setup_data = {
6370 .task = &data->task,
6371 .rpc_client = NFS_CLIENT(data->args.inode),
6372 .rpc_message = &msg,
6373 .callback_ops = &nfs4_layoutcommit_ops,
6374 .callback_data = data,
6375 .flags = RPC_TASK_ASYNC,
6377 struct rpc_task *task;
6380 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6381 "lbw: %llu inode %lu\n",
6382 data->task.tk_pid, sync,
6383 data->args.lastbytewritten,
6384 data->args.inode->i_ino);
6386 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
6387 task = rpc_run_task(&task_setup_data);
6389 return PTR_ERR(task);
6392 status = nfs4_wait_for_completion_rpc_task(task);
6395 status = task->tk_status;
6397 dprintk("%s: status %d\n", __func__, status);
6403 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6404 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6406 struct nfs41_secinfo_no_name_args args = {
6407 .style = SECINFO_STYLE_CURRENT_FH,
6409 struct nfs4_secinfo_res res = {
6412 struct rpc_message msg = {
6413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6417 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6421 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6422 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6424 struct nfs4_exception exception = { };
6427 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6430 case -NFS4ERR_WRONGSEC:
6431 case -NFS4ERR_NOTSUPP:
6434 err = nfs4_handle_exception(server, err, &exception);
6436 } while (exception.retry);
6442 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6443 struct nfs_fsinfo *info)
6447 rpc_authflavor_t flavor;
6448 struct nfs4_secinfo_flavors *flavors;
6450 page = alloc_page(GFP_KERNEL);
6456 flavors = page_address(page);
6457 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6460 * Fall back on "guess and check" method if
6461 * the server doesn't support SECINFO_NO_NAME
6463 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6464 err = nfs4_find_root_sec(server, fhandle, info);
6470 flavor = nfs_find_best_sec(flavors);
6472 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6482 static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6485 struct nfs41_test_stateid_args args = {
6488 struct nfs41_test_stateid_res res;
6489 struct rpc_message msg = {
6490 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6495 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6496 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6498 if (status == NFS_OK)
6503 static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6505 struct nfs4_exception exception = { };
6508 err = nfs4_handle_exception(server,
6509 _nfs41_test_stateid(server, stateid),
6511 } while (exception.retry);
6515 static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6517 struct nfs41_free_stateid_args args = {
6520 struct nfs41_free_stateid_res res;
6521 struct rpc_message msg = {
6522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6527 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
6528 return nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
6531 static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
6533 struct nfs4_exception exception = { };
6536 err = nfs4_handle_exception(server,
6537 _nfs4_free_stateid(server, stateid),
6539 } while (exception.retry);
6543 static bool nfs41_match_stateid(const nfs4_stateid *s1,
6544 const nfs4_stateid *s2)
6546 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
6549 if (s1->seqid == s2->seqid)
6551 if (s1->seqid == 0 || s2->seqid == 0)
6557 #endif /* CONFIG_NFS_V4_1 */
6559 static bool nfs4_match_stateid(const nfs4_stateid *s1,
6560 const nfs4_stateid *s2)
6562 return nfs4_stateid_match(s1, s2);
6566 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
6567 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6568 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6569 .recover_open = nfs4_open_reclaim,
6570 .recover_lock = nfs4_lock_reclaim,
6571 .establish_clid = nfs4_init_clientid,
6572 .get_clid_cred = nfs4_get_setclientid_cred,
6575 #if defined(CONFIG_NFS_V4_1)
6576 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
6577 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6578 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6579 .recover_open = nfs4_open_reclaim,
6580 .recover_lock = nfs4_lock_reclaim,
6581 .establish_clid = nfs41_init_clientid,
6582 .get_clid_cred = nfs4_get_exchange_id_cred,
6583 .reclaim_complete = nfs41_proc_reclaim_complete,
6585 #endif /* CONFIG_NFS_V4_1 */
6587 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
6588 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6589 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6590 .recover_open = nfs4_open_expired,
6591 .recover_lock = nfs4_lock_expired,
6592 .establish_clid = nfs4_init_clientid,
6593 .get_clid_cred = nfs4_get_setclientid_cred,
6596 #if defined(CONFIG_NFS_V4_1)
6597 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
6598 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6599 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6600 .recover_open = nfs41_open_expired,
6601 .recover_lock = nfs41_lock_expired,
6602 .establish_clid = nfs41_init_clientid,
6603 .get_clid_cred = nfs4_get_exchange_id_cred,
6605 #endif /* CONFIG_NFS_V4_1 */
6607 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
6608 .sched_state_renewal = nfs4_proc_async_renew,
6609 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
6610 .renew_lease = nfs4_proc_renew,
6613 #if defined(CONFIG_NFS_V4_1)
6614 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
6615 .sched_state_renewal = nfs41_proc_async_sequence,
6616 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
6617 .renew_lease = nfs4_proc_sequence,
6621 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6623 .call_sync = _nfs4_call_sync,
6624 .match_stateid = nfs4_match_stateid,
6625 .find_root_sec = nfs4_find_root_sec,
6626 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6627 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6628 .state_renewal_ops = &nfs40_state_renewal_ops,
6631 #if defined(CONFIG_NFS_V4_1)
6632 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6634 .call_sync = _nfs4_call_sync_session,
6635 .match_stateid = nfs41_match_stateid,
6636 .find_root_sec = nfs41_find_root_sec,
6637 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6638 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6639 .state_renewal_ops = &nfs41_state_renewal_ops,
6643 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6644 [0] = &nfs_v4_0_minor_ops,
6645 #if defined(CONFIG_NFS_V4_1)
6646 [1] = &nfs_v4_1_minor_ops,
6650 static const struct inode_operations nfs4_file_inode_operations = {
6651 .permission = nfs_permission,
6652 .getattr = nfs_getattr,
6653 .setattr = nfs_setattr,
6654 .getxattr = generic_getxattr,
6655 .setxattr = generic_setxattr,
6656 .listxattr = generic_listxattr,
6657 .removexattr = generic_removexattr,
6660 const struct nfs_rpc_ops nfs_v4_clientops = {
6661 .version = 4, /* protocol version */
6662 .dentry_ops = &nfs4_dentry_operations,
6663 .dir_inode_ops = &nfs4_dir_inode_operations,
6664 .file_inode_ops = &nfs4_file_inode_operations,
6665 .file_ops = &nfs4_file_operations,
6666 .getroot = nfs4_proc_get_root,
6667 .submount = nfs4_submount,
6668 .getattr = nfs4_proc_getattr,
6669 .setattr = nfs4_proc_setattr,
6670 .lookup = nfs4_proc_lookup,
6671 .access = nfs4_proc_access,
6672 .readlink = nfs4_proc_readlink,
6673 .create = nfs4_proc_create,
6674 .remove = nfs4_proc_remove,
6675 .unlink_setup = nfs4_proc_unlink_setup,
6676 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
6677 .unlink_done = nfs4_proc_unlink_done,
6678 .rename = nfs4_proc_rename,
6679 .rename_setup = nfs4_proc_rename_setup,
6680 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
6681 .rename_done = nfs4_proc_rename_done,
6682 .link = nfs4_proc_link,
6683 .symlink = nfs4_proc_symlink,
6684 .mkdir = nfs4_proc_mkdir,
6685 .rmdir = nfs4_proc_remove,
6686 .readdir = nfs4_proc_readdir,
6687 .mknod = nfs4_proc_mknod,
6688 .statfs = nfs4_proc_statfs,
6689 .fsinfo = nfs4_proc_fsinfo,
6690 .pathconf = nfs4_proc_pathconf,
6691 .set_capabilities = nfs4_server_capabilities,
6692 .decode_dirent = nfs4_decode_dirent,
6693 .read_setup = nfs4_proc_read_setup,
6694 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
6695 .read_done = nfs4_read_done,
6696 .write_setup = nfs4_proc_write_setup,
6697 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
6698 .write_done = nfs4_write_done,
6699 .commit_setup = nfs4_proc_commit_setup,
6700 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
6701 .commit_done = nfs4_commit_done,
6702 .lock = nfs4_proc_lock,
6703 .clear_acl_cache = nfs4_zap_acl_attr,
6704 .close_context = nfs4_close_context,
6705 .open_context = nfs4_atomic_open,
6706 .init_client = nfs4_init_client,
6709 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6710 .prefix = XATTR_NAME_NFSV4_ACL,
6711 .list = nfs4_xattr_list_nfs4_acl,
6712 .get = nfs4_xattr_get_nfs4_acl,
6713 .set = nfs4_xattr_set_nfs4_acl,
6716 const struct xattr_handler *nfs4_xattr_handlers[] = {
6717 &nfs4_xattr_nfs4_acl_handler,
6721 module_param(max_session_slots, ushort, 0644);
6722 MODULE_PARM_DESC(max_session_slots, "Maximum number of outstanding NFSv4.1 "
6723 "requests the client will negotiate");