4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/delay.h>
40 #include <linux/errno.h>
41 #include <linux/string.h>
42 #include <linux/ratelimit.h>
43 #include <linux/printk.h>
44 #include <linux/slab.h>
45 #include <linux/sunrpc/clnt.h>
46 #include <linux/nfs.h>
47 #include <linux/nfs4.h>
48 #include <linux/nfs_fs.h>
49 #include <linux/nfs_page.h>
50 #include <linux/nfs_mount.h>
51 #include <linux/namei.h>
52 #include <linux/mount.h>
53 #include <linux/module.h>
54 #include <linux/xattr.h>
55 #include <linux/utsname.h>
56 #include <linux/freezer.h>
59 #include "delegation.h"
65 #include "nfs4idmap.h"
66 #include "nfs4session.h"
69 #include "nfs4trace.h"
71 #define NFSDBG_FACILITY NFSDBG_PROC
73 #define NFS4_POLL_RETRY_MIN (HZ/10)
74 #define NFS4_POLL_RETRY_MAX (15*HZ)
76 /* file attributes which can be mapped to nfs attributes */
77 #define NFS4_VALID_ATTRS (ATTR_MODE \
88 static int _nfs4_proc_open(struct nfs4_opendata *data);
89 static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
90 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
91 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
92 static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
93 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
94 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
95 struct nfs_fattr *fattr, struct iattr *sattr,
96 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
97 struct nfs4_label *olabel);
98 #ifdef CONFIG_NFS_V4_1
99 static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
101 static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
102 struct rpc_cred *, bool);
105 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
106 static inline struct nfs4_label *
107 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
108 struct iattr *sattr, struct nfs4_label *label)
115 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
118 err = security_dentry_init_security(dentry, sattr->ia_mode,
119 &dentry->d_name, (void **)&label->label, &label->len);
126 nfs4_label_release_security(struct nfs4_label *label)
129 security_release_secctx(label->label, label->len);
131 static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
134 return server->attr_bitmask;
136 return server->attr_bitmask_nl;
139 static inline struct nfs4_label *
140 nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
141 struct iattr *sattr, struct nfs4_label *l)
144 nfs4_label_release_security(struct nfs4_label *label)
147 nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
148 { return server->attr_bitmask; }
151 /* Prevent leaks of NFSv4 errors into userland */
152 static int nfs4_map_errors(int err)
157 case -NFS4ERR_RESOURCE:
158 case -NFS4ERR_LAYOUTTRYLATER:
159 case -NFS4ERR_RECALLCONFLICT:
161 case -NFS4ERR_WRONGSEC:
162 case -NFS4ERR_WRONG_CRED:
164 case -NFS4ERR_BADOWNER:
165 case -NFS4ERR_BADNAME:
167 case -NFS4ERR_SHARE_DENIED:
169 case -NFS4ERR_MINOR_VERS_MISMATCH:
170 return -EPROTONOSUPPORT;
171 case -NFS4ERR_FILE_OPEN:
174 dprintk("%s could not handle NFSv4 error %d\n",
182 * This is our standard bitmap for GETATTR requests.
184 const u32 nfs4_fattr_bitmap[3] = {
186 | FATTR4_WORD0_CHANGE
189 | FATTR4_WORD0_FILEID,
191 | FATTR4_WORD1_NUMLINKS
193 | FATTR4_WORD1_OWNER_GROUP
194 | FATTR4_WORD1_RAWDEV
195 | FATTR4_WORD1_SPACE_USED
196 | FATTR4_WORD1_TIME_ACCESS
197 | FATTR4_WORD1_TIME_METADATA
198 | FATTR4_WORD1_TIME_MODIFY
199 | FATTR4_WORD1_MOUNTED_ON_FILEID,
200 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
201 FATTR4_WORD2_SECURITY_LABEL
205 static const u32 nfs4_pnfs_open_bitmap[3] = {
207 | FATTR4_WORD0_CHANGE
210 | FATTR4_WORD0_FILEID,
212 | FATTR4_WORD1_NUMLINKS
214 | FATTR4_WORD1_OWNER_GROUP
215 | FATTR4_WORD1_RAWDEV
216 | FATTR4_WORD1_SPACE_USED
217 | FATTR4_WORD1_TIME_ACCESS
218 | FATTR4_WORD1_TIME_METADATA
219 | FATTR4_WORD1_TIME_MODIFY,
220 FATTR4_WORD2_MDSTHRESHOLD
221 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
222 | FATTR4_WORD2_SECURITY_LABEL
226 static const u32 nfs4_open_noattr_bitmap[3] = {
228 | FATTR4_WORD0_FILEID,
231 const u32 nfs4_statfs_bitmap[3] = {
232 FATTR4_WORD0_FILES_AVAIL
233 | FATTR4_WORD0_FILES_FREE
234 | FATTR4_WORD0_FILES_TOTAL,
235 FATTR4_WORD1_SPACE_AVAIL
236 | FATTR4_WORD1_SPACE_FREE
237 | FATTR4_WORD1_SPACE_TOTAL
240 const u32 nfs4_pathconf_bitmap[3] = {
242 | FATTR4_WORD0_MAXNAME,
246 const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
247 | FATTR4_WORD0_MAXREAD
248 | FATTR4_WORD0_MAXWRITE
249 | FATTR4_WORD0_LEASE_TIME,
250 FATTR4_WORD1_TIME_DELTA
251 | FATTR4_WORD1_FS_LAYOUT_TYPES,
252 FATTR4_WORD2_LAYOUT_BLKSIZE
253 | FATTR4_WORD2_CLONE_BLKSIZE
256 const u32 nfs4_fs_locations_bitmap[3] = {
258 | FATTR4_WORD0_CHANGE
261 | FATTR4_WORD0_FILEID
262 | FATTR4_WORD0_FS_LOCATIONS,
264 | FATTR4_WORD1_NUMLINKS
266 | FATTR4_WORD1_OWNER_GROUP
267 | FATTR4_WORD1_RAWDEV
268 | FATTR4_WORD1_SPACE_USED
269 | FATTR4_WORD1_TIME_ACCESS
270 | FATTR4_WORD1_TIME_METADATA
271 | FATTR4_WORD1_TIME_MODIFY
272 | FATTR4_WORD1_MOUNTED_ON_FILEID,
275 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
276 struct nfs4_readdir_arg *readdir)
281 readdir->cookie = cookie;
282 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
287 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
292 * NFSv4 servers do not return entries for '.' and '..'
293 * Therefore, we fake these entries here. We let '.'
294 * have cookie 0 and '..' have cookie 1. Note that
295 * when talking to the server, we always send cookie 0
298 start = p = kmap_atomic(*readdir->pages);
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_one; /* cookie, second word */
304 *p++ = xdr_one; /* entry len */
305 memcpy(p, ".\0\0\0", 4); /* entry */
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
313 *p++ = xdr_one; /* next */
314 *p++ = xdr_zero; /* cookie, first word */
315 *p++ = xdr_two; /* cookie, second word */
316 *p++ = xdr_two; /* entry len */
317 memcpy(p, "..\0\0", 4); /* entry */
319 *p++ = xdr_one; /* bitmap length */
320 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
321 *p++ = htonl(8); /* attribute buffer length */
322 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
324 readdir->pgbase = (char *)p - (char *)start;
325 readdir->count -= readdir->pgbase;
326 kunmap_atomic(start);
329 static void nfs4_test_and_free_stateid(struct nfs_server *server,
330 nfs4_stateid *stateid,
331 struct rpc_cred *cred)
333 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
335 ops->test_and_free_expired(server, stateid, cred);
338 static void __nfs4_free_revoked_stateid(struct nfs_server *server,
339 nfs4_stateid *stateid,
340 struct rpc_cred *cred)
342 stateid->type = NFS4_REVOKED_STATEID_TYPE;
343 nfs4_test_and_free_stateid(server, stateid, cred);
346 static void nfs4_free_revoked_stateid(struct nfs_server *server,
347 const nfs4_stateid *stateid,
348 struct rpc_cred *cred)
352 nfs4_stateid_copy(&tmp, stateid);
353 __nfs4_free_revoked_stateid(server, &tmp, cred);
356 static long nfs4_update_delay(long *timeout)
360 return NFS4_POLL_RETRY_MAX;
362 *timeout = NFS4_POLL_RETRY_MIN;
363 if (*timeout > NFS4_POLL_RETRY_MAX)
364 *timeout = NFS4_POLL_RETRY_MAX;
370 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
376 freezable_schedule_timeout_killable_unsafe(
377 nfs4_update_delay(timeout));
378 if (fatal_signal_pending(current))
383 /* This is the error handling routine for processes that are allowed
386 static int nfs4_do_handle_exception(struct nfs_server *server,
387 int errorcode, struct nfs4_exception *exception)
389 struct nfs_client *clp = server->nfs_client;
390 struct nfs4_state *state = exception->state;
391 const nfs4_stateid *stateid = exception->stateid;
392 struct inode *inode = exception->inode;
395 exception->delay = 0;
396 exception->recovering = 0;
397 exception->retry = 0;
399 if (stateid == NULL && state != NULL)
400 stateid = &state->stateid;
405 case -NFS4ERR_DELEG_REVOKED:
406 case -NFS4ERR_ADMIN_REVOKED:
407 case -NFS4ERR_EXPIRED:
408 case -NFS4ERR_BAD_STATEID:
409 if (inode != NULL && stateid != NULL) {
410 nfs_inode_find_state_and_recover(inode,
412 goto wait_on_recovery;
414 case -NFS4ERR_OPENMODE:
418 err = nfs_async_inode_return_delegation(inode,
421 goto wait_on_recovery;
422 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
423 exception->retry = 1;
429 ret = nfs4_schedule_stateid_recovery(server, state);
432 goto wait_on_recovery;
433 case -NFS4ERR_STALE_STATEID:
434 case -NFS4ERR_STALE_CLIENTID:
435 nfs4_schedule_lease_recovery(clp);
436 goto wait_on_recovery;
438 ret = nfs4_schedule_migration_recovery(server);
441 goto wait_on_recovery;
442 case -NFS4ERR_LEASE_MOVED:
443 nfs4_schedule_lease_moved_recovery(clp);
444 goto wait_on_recovery;
445 #if defined(CONFIG_NFS_V4_1)
446 case -NFS4ERR_BADSESSION:
447 case -NFS4ERR_BADSLOT:
448 case -NFS4ERR_BAD_HIGH_SLOT:
449 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
450 case -NFS4ERR_DEADSESSION:
451 case -NFS4ERR_SEQ_FALSE_RETRY:
452 case -NFS4ERR_SEQ_MISORDERED:
453 dprintk("%s ERROR: %d Reset session\n", __func__,
455 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
456 goto wait_on_recovery;
457 #endif /* defined(CONFIG_NFS_V4_1) */
458 case -NFS4ERR_FILE_OPEN:
459 if (exception->timeout > HZ) {
460 /* We have retried a decent amount, time to
467 nfs_inc_server_stats(server, NFSIOS_DELAY);
469 case -NFS4ERR_LAYOUTTRYLATER:
470 case -NFS4ERR_RECALLCONFLICT:
471 exception->delay = 1;
474 case -NFS4ERR_RETRY_UNCACHED_REP:
475 case -NFS4ERR_OLD_STATEID:
476 exception->retry = 1;
478 case -NFS4ERR_BADOWNER:
479 /* The following works around a Linux server bug! */
480 case -NFS4ERR_BADNAME:
481 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
482 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
483 exception->retry = 1;
484 printk(KERN_WARNING "NFS: v4 server %s "
485 "does not accept raw "
487 "Reenabling the idmapper.\n",
488 server->nfs_client->cl_hostname);
491 /* We failed to handle the error */
492 return nfs4_map_errors(ret);
494 exception->recovering = 1;
498 /* This is the error handling routine for processes that are allowed
501 int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
503 struct nfs_client *clp = server->nfs_client;
506 ret = nfs4_do_handle_exception(server, errorcode, exception);
507 if (exception->delay) {
508 ret = nfs4_delay(server->client, &exception->timeout);
511 if (exception->recovering) {
512 ret = nfs4_wait_clnt_recover(clp);
513 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
520 exception->retry = 1;
525 nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
526 int errorcode, struct nfs4_exception *exception)
528 struct nfs_client *clp = server->nfs_client;
531 ret = nfs4_do_handle_exception(server, errorcode, exception);
532 if (exception->delay) {
533 rpc_delay(task, nfs4_update_delay(&exception->timeout));
536 if (exception->recovering) {
537 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
538 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
539 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
542 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
547 exception->retry = 1;
552 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
553 struct nfs4_state *state, long *timeout)
555 struct nfs4_exception exception = {
559 if (task->tk_status >= 0)
562 exception.timeout = *timeout;
563 task->tk_status = nfs4_async_handle_exception(task, server,
566 if (exception.delay && timeout)
567 *timeout = exception.timeout;
574 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
575 * or 'false' otherwise.
577 static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
579 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
580 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
583 static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
585 spin_lock(&clp->cl_lock);
586 if (time_before(clp->cl_last_renewal,timestamp))
587 clp->cl_last_renewal = timestamp;
588 spin_unlock(&clp->cl_lock);
591 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
593 struct nfs_client *clp = server->nfs_client;
595 if (!nfs4_has_session(clp))
596 do_renew_lease(clp, timestamp);
599 struct nfs4_call_sync_data {
600 const struct nfs_server *seq_server;
601 struct nfs4_sequence_args *seq_args;
602 struct nfs4_sequence_res *seq_res;
605 void nfs4_init_sequence(struct nfs4_sequence_args *args,
606 struct nfs4_sequence_res *res, int cache_reply)
608 args->sa_slot = NULL;
609 args->sa_cache_this = cache_reply;
610 args->sa_privileged = 0;
615 static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
617 args->sa_privileged = 1;
620 static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
622 struct nfs4_slot *slot = res->sr_slot;
623 struct nfs4_slot_table *tbl;
626 spin_lock(&tbl->slot_tbl_lock);
627 if (!nfs41_wake_and_assign_slot(tbl, slot))
628 nfs4_free_slot(tbl, slot);
629 spin_unlock(&tbl->slot_tbl_lock);
634 static int nfs40_sequence_done(struct rpc_task *task,
635 struct nfs4_sequence_res *res)
637 if (res->sr_slot != NULL)
638 nfs40_sequence_free_slot(res);
642 #if defined(CONFIG_NFS_V4_1)
644 static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
646 struct nfs4_session *session;
647 struct nfs4_slot_table *tbl;
648 struct nfs4_slot *slot = res->sr_slot;
649 bool send_new_highest_used_slotid = false;
652 session = tbl->session;
654 /* Bump the slot sequence number */
659 spin_lock(&tbl->slot_tbl_lock);
660 /* Be nice to the server: try to ensure that the last transmitted
661 * value for highest_user_slotid <= target_highest_slotid
663 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
664 send_new_highest_used_slotid = true;
666 if (nfs41_wake_and_assign_slot(tbl, slot)) {
667 send_new_highest_used_slotid = false;
670 nfs4_free_slot(tbl, slot);
672 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
673 send_new_highest_used_slotid = false;
675 spin_unlock(&tbl->slot_tbl_lock);
677 if (send_new_highest_used_slotid)
678 nfs41_notify_server(session->clp);
679 if (waitqueue_active(&tbl->slot_waitq))
680 wake_up_all(&tbl->slot_waitq);
683 static int nfs41_sequence_process(struct rpc_task *task,
684 struct nfs4_sequence_res *res)
686 struct nfs4_session *session;
687 struct nfs4_slot *slot = res->sr_slot;
688 struct nfs_client *clp;
689 bool interrupted = false;
694 /* don't increment the sequence number if the task wasn't sent */
695 if (!RPC_WAS_SENT(task))
698 session = slot->table->session;
700 if (slot->interrupted) {
701 slot->interrupted = 0;
705 trace_nfs4_sequence_done(session, res);
706 /* Check the SEQUENCE operation status */
707 switch (res->sr_status) {
709 /* If previous op on slot was interrupted and we reused
710 * the seq# and got a reply from the cache, then retry
712 if (task->tk_status == -EREMOTEIO && interrupted) {
716 /* Update the slot's sequence and clientid lease timer */
719 do_renew_lease(clp, res->sr_timestamp);
720 /* Check sequence flags */
721 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
723 nfs41_update_target_slotid(slot->table, slot, res);
727 * sr_status remains 1 if an RPC level error occurred.
728 * The server may or may not have processed the sequence
730 * Mark the slot as having hosted an interrupted RPC call.
732 slot->interrupted = 1;
735 /* The server detected a resend of the RPC call and
736 * returned NFS4ERR_DELAY as per Section 2.10.6.2
739 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
744 case -NFS4ERR_BADSLOT:
746 * The slot id we used was probably retired. Try again
747 * using a different slot id.
750 case -NFS4ERR_SEQ_MISORDERED:
752 * Was the last operation on this sequence interrupted?
753 * If so, retry after bumping the sequence number.
760 * Could this slot have been previously retired?
761 * If so, then the server may be expecting seq_nr = 1!
763 if (slot->seq_nr != 1) {
768 case -NFS4ERR_SEQ_FALSE_RETRY:
772 /* Just update the slot sequence no. */
776 /* The session may be reset by one of the error handlers. */
777 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
781 if (rpc_restart_call_prepare(task)) {
782 nfs41_sequence_free_slot(res);
788 if (!rpc_restart_call(task))
790 rpc_delay(task, NFS4_POLL_RETRY_MAX);
794 int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
796 if (!nfs41_sequence_process(task, res))
798 if (res->sr_slot != NULL)
799 nfs41_sequence_free_slot(res);
803 EXPORT_SYMBOL_GPL(nfs41_sequence_done);
805 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
807 if (res->sr_slot == NULL)
809 if (res->sr_slot->table->session != NULL)
810 return nfs41_sequence_process(task, res);
811 return nfs40_sequence_done(task, res);
814 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
816 if (res->sr_slot != NULL) {
817 if (res->sr_slot->table->session != NULL)
818 nfs41_sequence_free_slot(res);
820 nfs40_sequence_free_slot(res);
824 int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
826 if (res->sr_slot == NULL)
828 if (!res->sr_slot->table->session)
829 return nfs40_sequence_done(task, res);
830 return nfs41_sequence_done(task, res);
832 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
834 static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
836 struct nfs4_call_sync_data *data = calldata;
838 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
840 nfs4_setup_sequence(data->seq_server->nfs_client,
841 data->seq_args, data->seq_res, task);
844 static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
846 struct nfs4_call_sync_data *data = calldata;
848 nfs41_sequence_done(task, data->seq_res);
851 static const struct rpc_call_ops nfs41_call_sync_ops = {
852 .rpc_call_prepare = nfs41_call_sync_prepare,
853 .rpc_call_done = nfs41_call_sync_done,
856 #else /* !CONFIG_NFS_V4_1 */
858 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
860 return nfs40_sequence_done(task, res);
863 static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
865 if (res->sr_slot != NULL)
866 nfs40_sequence_free_slot(res);
869 int nfs4_sequence_done(struct rpc_task *task,
870 struct nfs4_sequence_res *res)
872 return nfs40_sequence_done(task, res);
874 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
876 #endif /* !CONFIG_NFS_V4_1 */
878 int nfs4_setup_sequence(const struct nfs_client *client,
879 struct nfs4_sequence_args *args,
880 struct nfs4_sequence_res *res,
881 struct rpc_task *task)
883 struct nfs4_session *session = nfs4_get_session(client);
884 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
885 struct nfs4_slot *slot;
887 /* slot already allocated? */
888 if (res->sr_slot != NULL)
892 tbl = &session->fc_slot_table;
893 task->tk_timeout = 0;
896 spin_lock(&tbl->slot_tbl_lock);
897 /* The state manager will wait until the slot table is empty */
898 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
901 slot = nfs4_alloc_slot(tbl);
903 /* Try again in 1/4 second */
904 if (slot == ERR_PTR(-ENOMEM))
905 task->tk_timeout = HZ >> 2;
908 spin_unlock(&tbl->slot_tbl_lock);
910 slot->privileged = args->sa_privileged ? 1 : 0;
911 args->sa_slot = slot;
915 res->sr_timestamp = jiffies;
916 res->sr_status_flags = 0;
920 trace_nfs4_setup_sequence(session, args);
922 rpc_call_start(task);
926 if (args->sa_privileged)
927 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
928 NULL, RPC_PRIORITY_PRIVILEGED);
930 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
931 spin_unlock(&tbl->slot_tbl_lock);
934 EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
936 static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
938 struct nfs4_call_sync_data *data = calldata;
939 nfs4_setup_sequence(data->seq_server->nfs_client,
940 data->seq_args, data->seq_res, task);
943 static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
945 struct nfs4_call_sync_data *data = calldata;
946 nfs4_sequence_done(task, data->seq_res);
949 static const struct rpc_call_ops nfs40_call_sync_ops = {
950 .rpc_call_prepare = nfs40_call_sync_prepare,
951 .rpc_call_done = nfs40_call_sync_done,
954 static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
955 struct nfs_server *server,
956 struct rpc_message *msg,
957 struct nfs4_sequence_args *args,
958 struct nfs4_sequence_res *res)
961 struct rpc_task *task;
962 struct nfs_client *clp = server->nfs_client;
963 struct nfs4_call_sync_data data = {
964 .seq_server = server,
968 struct rpc_task_setup task_setup = {
971 .callback_ops = clp->cl_mvops->call_sync_ops,
972 .callback_data = &data
975 task = rpc_run_task(&task_setup);
979 ret = task->tk_status;
985 int nfs4_call_sync(struct rpc_clnt *clnt,
986 struct nfs_server *server,
987 struct rpc_message *msg,
988 struct nfs4_sequence_args *args,
989 struct nfs4_sequence_res *res,
992 nfs4_init_sequence(args, res, cache_reply);
993 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
996 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
997 unsigned long timestamp)
999 struct nfs_inode *nfsi = NFS_I(dir);
1001 spin_lock(&dir->i_lock);
1002 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1003 if (cinfo->atomic && cinfo->before == dir->i_version) {
1004 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1005 nfsi->attrtimeo_timestamp = jiffies;
1007 nfs_force_lookup_revalidate(dir);
1008 if (cinfo->before != dir->i_version)
1009 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1010 NFS_INO_INVALID_ACL;
1012 dir->i_version = cinfo->after;
1013 nfsi->read_cache_jiffies = timestamp;
1014 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1015 nfs_fscache_invalidate(dir);
1016 spin_unlock(&dir->i_lock);
1019 struct nfs4_opendata {
1021 struct nfs_openargs o_arg;
1022 struct nfs_openres o_res;
1023 struct nfs_open_confirmargs c_arg;
1024 struct nfs_open_confirmres c_res;
1025 struct nfs4_string owner_name;
1026 struct nfs4_string group_name;
1027 struct nfs4_label *a_label;
1028 struct nfs_fattr f_attr;
1029 struct nfs4_label *f_label;
1031 struct dentry *dentry;
1032 struct nfs4_state_owner *owner;
1033 struct nfs4_state *state;
1035 unsigned long timestamp;
1036 unsigned int rpc_done : 1;
1037 unsigned int file_created : 1;
1038 unsigned int is_recover : 1;
1043 static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1044 int err, struct nfs4_exception *exception)
1048 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1050 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1051 exception->retry = 1;
1056 nfs4_map_atomic_open_share(struct nfs_server *server,
1057 fmode_t fmode, int openflags)
1061 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1063 res = NFS4_SHARE_ACCESS_READ;
1066 res = NFS4_SHARE_ACCESS_WRITE;
1068 case FMODE_READ|FMODE_WRITE:
1069 res = NFS4_SHARE_ACCESS_BOTH;
1071 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1073 /* Want no delegation if we're using O_DIRECT */
1074 if (openflags & O_DIRECT)
1075 res |= NFS4_SHARE_WANT_NO_DELEG;
1080 static enum open_claim_type4
1081 nfs4_map_atomic_open_claim(struct nfs_server *server,
1082 enum open_claim_type4 claim)
1084 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1089 case NFS4_OPEN_CLAIM_FH:
1090 return NFS4_OPEN_CLAIM_NULL;
1091 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1092 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1093 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1094 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1098 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1100 p->o_res.f_attr = &p->f_attr;
1101 p->o_res.f_label = p->f_label;
1102 p->o_res.seqid = p->o_arg.seqid;
1103 p->c_res.seqid = p->c_arg.seqid;
1104 p->o_res.server = p->o_arg.server;
1105 p->o_res.access_request = p->o_arg.access;
1106 nfs_fattr_init(&p->f_attr);
1107 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
1110 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
1111 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
1112 const struct iattr *attrs,
1113 struct nfs4_label *label,
1114 enum open_claim_type4 claim,
1117 struct dentry *parent = dget_parent(dentry);
1118 struct inode *dir = d_inode(parent);
1119 struct nfs_server *server = NFS_SERVER(dir);
1120 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1121 struct nfs4_opendata *p;
1123 p = kzalloc(sizeof(*p), gfp_mask);
1127 p->f_label = nfs4_label_alloc(server, gfp_mask);
1128 if (IS_ERR(p->f_label))
1131 p->a_label = nfs4_label_alloc(server, gfp_mask);
1132 if (IS_ERR(p->a_label))
1135 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1136 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
1137 if (IS_ERR(p->o_arg.seqid))
1138 goto err_free_label;
1139 nfs_sb_active(dentry->d_sb);
1140 p->dentry = dget(dentry);
1143 atomic_inc(&sp->so_count);
1144 p->o_arg.open_flags = flags;
1145 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
1146 p->o_arg.umask = current_umask();
1147 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1148 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1150 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1151 * will return permission denied for all bits until close */
1152 if (!(flags & O_EXCL)) {
1153 /* ask server to check for all possible rights as results
1155 switch (p->o_arg.claim) {
1158 case NFS4_OPEN_CLAIM_NULL:
1159 case NFS4_OPEN_CLAIM_FH:
1160 p->o_arg.access = NFS4_ACCESS_READ |
1161 NFS4_ACCESS_MODIFY |
1162 NFS4_ACCESS_EXTEND |
1163 NFS4_ACCESS_EXECUTE;
1166 p->o_arg.clientid = server->nfs_client->cl_clientid;
1167 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1168 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
1169 p->o_arg.name = &dentry->d_name;
1170 p->o_arg.server = server;
1171 p->o_arg.bitmask = nfs4_bitmask(server, label);
1172 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1173 p->o_arg.label = nfs4_label_copy(p->a_label, label);
1174 switch (p->o_arg.claim) {
1175 case NFS4_OPEN_CLAIM_NULL:
1176 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1177 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1178 p->o_arg.fh = NFS_FH(dir);
1180 case NFS4_OPEN_CLAIM_PREVIOUS:
1181 case NFS4_OPEN_CLAIM_FH:
1182 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1183 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1184 p->o_arg.fh = NFS_FH(d_inode(dentry));
1186 if (attrs != NULL && attrs->ia_valid != 0) {
1189 p->o_arg.u.attrs = &p->attrs;
1190 memcpy(&p->attrs, attrs, sizeof(p->attrs));
1193 verf[1] = current->pid;
1194 memcpy(p->o_arg.u.verifier.data, verf,
1195 sizeof(p->o_arg.u.verifier.data));
1197 p->c_arg.fh = &p->o_res.fh;
1198 p->c_arg.stateid = &p->o_res.stateid;
1199 p->c_arg.seqid = p->o_arg.seqid;
1200 nfs4_init_opendata_res(p);
1201 kref_init(&p->kref);
1205 nfs4_label_free(p->a_label);
1207 nfs4_label_free(p->f_label);
1215 static void nfs4_opendata_free(struct kref *kref)
1217 struct nfs4_opendata *p = container_of(kref,
1218 struct nfs4_opendata, kref);
1219 struct super_block *sb = p->dentry->d_sb;
1221 nfs_free_seqid(p->o_arg.seqid);
1222 nfs4_sequence_free_slot(&p->o_res.seq_res);
1223 if (p->state != NULL)
1224 nfs4_put_open_state(p->state);
1225 nfs4_put_state_owner(p->owner);
1227 nfs4_label_free(p->a_label);
1228 nfs4_label_free(p->f_label);
1232 nfs_sb_deactive(sb);
1233 nfs_fattr_free_names(&p->f_attr);
1234 kfree(p->f_attr.mdsthreshold);
1238 static void nfs4_opendata_put(struct nfs4_opendata *p)
1241 kref_put(&p->kref, nfs4_opendata_free);
1244 static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1247 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1248 case FMODE_READ|FMODE_WRITE:
1249 return state->n_rdwr != 0;
1251 return state->n_wronly != 0;
1253 return state->n_rdonly != 0;
1259 static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
1263 if (open_mode & (O_EXCL|O_TRUNC))
1265 switch (mode & (FMODE_READ|FMODE_WRITE)) {
1267 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1268 && state->n_rdonly != 0;
1271 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1272 && state->n_wronly != 0;
1274 case FMODE_READ|FMODE_WRITE:
1275 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1276 && state->n_rdwr != 0;
1282 static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1283 enum open_claim_type4 claim)
1285 if (delegation == NULL)
1287 if ((delegation->type & fmode) != fmode)
1289 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1292 case NFS4_OPEN_CLAIM_NULL:
1293 case NFS4_OPEN_CLAIM_FH:
1295 case NFS4_OPEN_CLAIM_PREVIOUS:
1296 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1301 nfs_mark_delegation_referenced(delegation);
1305 static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
1314 case FMODE_READ|FMODE_WRITE:
1317 nfs4_state_set_mode_locked(state, state->state | fmode);
1320 #ifdef CONFIG_NFS_V4_1
1321 static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1323 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1325 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1327 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1331 #endif /* CONFIG_NFS_V4_1 */
1333 static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1335 struct nfs_client *clp = state->owner->so_server->nfs_client;
1336 bool need_recover = false;
1338 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1339 need_recover = true;
1340 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1341 need_recover = true;
1342 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1343 need_recover = true;
1345 nfs4_state_mark_reclaim_nograce(clp, state);
1348 static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1349 const nfs4_stateid *stateid, nfs4_stateid *freeme)
1351 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1353 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1354 nfs4_stateid_copy(freeme, &state->open_stateid);
1355 nfs_test_and_clear_all_open_stateid(state);
1358 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1363 static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1365 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1367 if (state->n_wronly)
1368 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1369 if (state->n_rdonly)
1370 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1372 set_bit(NFS_O_RDWR_STATE, &state->flags);
1373 set_bit(NFS_OPEN_STATE, &state->flags);
1376 static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1377 nfs4_stateid *stateid, fmode_t fmode)
1379 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1380 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1382 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1385 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1388 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1389 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1390 clear_bit(NFS_OPEN_STATE, &state->flags);
1392 if (stateid == NULL)
1394 /* Handle OPEN+OPEN_DOWNGRADE races */
1395 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1396 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1397 nfs_resync_open_stateid_locked(state);
1400 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1401 nfs4_stateid_copy(&state->stateid, stateid);
1402 nfs4_stateid_copy(&state->open_stateid, stateid);
1405 static void nfs_clear_open_stateid(struct nfs4_state *state,
1406 nfs4_stateid *arg_stateid,
1407 nfs4_stateid *stateid, fmode_t fmode)
1409 write_seqlock(&state->seqlock);
1410 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1411 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1412 nfs_clear_open_stateid_locked(state, stateid, fmode);
1413 write_sequnlock(&state->seqlock);
1414 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1415 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
1418 static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1419 const nfs4_stateid *stateid, fmode_t fmode,
1420 nfs4_stateid *freeme)
1424 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1427 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1429 case FMODE_READ|FMODE_WRITE:
1430 set_bit(NFS_O_RDWR_STATE, &state->flags);
1432 if (!nfs_need_update_open_stateid(state, stateid, freeme))
1434 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1435 nfs4_stateid_copy(&state->stateid, stateid);
1436 nfs4_stateid_copy(&state->open_stateid, stateid);
1439 static void __update_open_stateid(struct nfs4_state *state,
1440 const nfs4_stateid *open_stateid,
1441 const nfs4_stateid *deleg_stateid,
1443 nfs4_stateid *freeme)
1446 * Protect the call to nfs4_state_set_mode_locked and
1447 * serialise the stateid update
1449 spin_lock(&state->owner->so_lock);
1450 write_seqlock(&state->seqlock);
1451 if (deleg_stateid != NULL) {
1452 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1453 set_bit(NFS_DELEGATED_STATE, &state->flags);
1455 if (open_stateid != NULL)
1456 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
1457 write_sequnlock(&state->seqlock);
1458 update_open_stateflags(state, fmode);
1459 spin_unlock(&state->owner->so_lock);
1462 static int update_open_stateid(struct nfs4_state *state,
1463 const nfs4_stateid *open_stateid,
1464 const nfs4_stateid *delegation,
1467 struct nfs_server *server = NFS_SERVER(state->inode);
1468 struct nfs_client *clp = server->nfs_client;
1469 struct nfs_inode *nfsi = NFS_I(state->inode);
1470 struct nfs_delegation *deleg_cur;
1471 nfs4_stateid freeme = { };
1474 fmode &= (FMODE_READ|FMODE_WRITE);
1477 deleg_cur = rcu_dereference(nfsi->delegation);
1478 if (deleg_cur == NULL)
1481 spin_lock(&deleg_cur->lock);
1482 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
1483 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
1484 (deleg_cur->type & fmode) != fmode)
1485 goto no_delegation_unlock;
1487 if (delegation == NULL)
1488 delegation = &deleg_cur->stateid;
1489 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
1490 goto no_delegation_unlock;
1492 nfs_mark_delegation_referenced(deleg_cur);
1493 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1496 no_delegation_unlock:
1497 spin_unlock(&deleg_cur->lock);
1501 if (!ret && open_stateid != NULL) {
1502 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
1505 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1506 nfs4_schedule_state_manager(clp);
1507 if (freeme.type != 0)
1508 nfs4_test_and_free_stateid(server, &freeme,
1509 state->owner->so_cred);
1514 static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1515 const nfs4_stateid *stateid)
1517 struct nfs4_state *state = lsp->ls_state;
1520 spin_lock(&state->state_lock);
1521 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1523 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1525 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1528 spin_unlock(&state->state_lock);
1532 static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
1534 struct nfs_delegation *delegation;
1537 delegation = rcu_dereference(NFS_I(inode)->delegation);
1538 if (delegation == NULL || (delegation->type & fmode) == fmode) {
1543 nfs4_inode_return_delegation(inode);
1546 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
1548 struct nfs4_state *state = opendata->state;
1549 struct nfs_inode *nfsi = NFS_I(state->inode);
1550 struct nfs_delegation *delegation;
1551 int open_mode = opendata->o_arg.open_flags;
1552 fmode_t fmode = opendata->o_arg.fmode;
1553 enum open_claim_type4 claim = opendata->o_arg.claim;
1554 nfs4_stateid stateid;
1558 spin_lock(&state->owner->so_lock);
1559 if (can_open_cached(state, fmode, open_mode)) {
1560 update_open_stateflags(state, fmode);
1561 spin_unlock(&state->owner->so_lock);
1562 goto out_return_state;
1564 spin_unlock(&state->owner->so_lock);
1566 delegation = rcu_dereference(nfsi->delegation);
1567 if (!can_open_delegated(delegation, fmode, claim)) {
1571 /* Save the delegation */
1572 nfs4_stateid_copy(&stateid, &delegation->stateid);
1574 nfs_release_seqid(opendata->o_arg.seqid);
1575 if (!opendata->is_recover) {
1576 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1582 /* Try to update the stateid using the delegation */
1583 if (update_open_stateid(state, NULL, &stateid, fmode))
1584 goto out_return_state;
1587 return ERR_PTR(ret);
1589 atomic_inc(&state->count);
1594 nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1596 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1597 struct nfs_delegation *delegation;
1598 int delegation_flags = 0;
1601 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1603 delegation_flags = delegation->flags;
1605 switch (data->o_arg.claim) {
1608 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1609 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1610 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1611 "returning a delegation for "
1612 "OPEN(CLAIM_DELEGATE_CUR)\n",
1616 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1617 nfs_inode_set_delegation(state->inode,
1618 data->owner->so_cred,
1621 nfs_inode_reclaim_delegation(state->inode,
1622 data->owner->so_cred,
1627 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1628 * and update the nfs4_state.
1630 static struct nfs4_state *
1631 _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1633 struct inode *inode = data->state->inode;
1634 struct nfs4_state *state = data->state;
1637 if (!data->rpc_done) {
1638 if (data->rpc_status)
1639 return ERR_PTR(data->rpc_status);
1640 /* cached opens have already been processed */
1644 ret = nfs_refresh_inode(inode, &data->f_attr);
1646 return ERR_PTR(ret);
1648 if (data->o_res.delegation_type != 0)
1649 nfs4_opendata_check_deleg(data, state);
1651 update_open_stateid(state, &data->o_res.stateid, NULL,
1653 atomic_inc(&state->count);
1658 static struct nfs4_state *
1659 _nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1661 struct inode *inode;
1662 struct nfs4_state *state = NULL;
1665 if (!data->rpc_done) {
1666 state = nfs4_try_open_cached(data);
1667 trace_nfs4_cached_open(data->state);
1672 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1674 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1675 ret = PTR_ERR(inode);
1679 state = nfs4_get_open_state(inode, data->owner);
1682 if (data->o_res.delegation_type != 0)
1683 nfs4_opendata_check_deleg(data, state);
1684 update_open_stateid(state, &data->o_res.stateid, NULL,
1688 nfs_release_seqid(data->o_arg.seqid);
1693 return ERR_PTR(ret);
1696 static struct nfs4_state *
1697 nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1699 struct nfs4_state *ret;
1701 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1702 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1704 ret = _nfs4_opendata_to_nfs4_state(data);
1705 nfs4_sequence_free_slot(&data->o_res.seq_res);
1709 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1711 struct nfs_inode *nfsi = NFS_I(state->inode);
1712 struct nfs_open_context *ctx;
1714 spin_lock(&state->inode->i_lock);
1715 list_for_each_entry(ctx, &nfsi->open_files, list) {
1716 if (ctx->state != state)
1718 get_nfs_open_context(ctx);
1719 spin_unlock(&state->inode->i_lock);
1722 spin_unlock(&state->inode->i_lock);
1723 return ERR_PTR(-ENOENT);
1726 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1727 struct nfs4_state *state, enum open_claim_type4 claim)
1729 struct nfs4_opendata *opendata;
1731 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1732 NULL, NULL, claim, GFP_NOFS);
1733 if (opendata == NULL)
1734 return ERR_PTR(-ENOMEM);
1735 opendata->state = state;
1736 atomic_inc(&state->count);
1740 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1743 struct nfs4_state *newstate;
1746 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
1748 opendata->o_arg.open_flags = 0;
1749 opendata->o_arg.fmode = fmode;
1750 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1751 NFS_SB(opendata->dentry->d_sb),
1753 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1754 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1755 nfs4_init_opendata_res(opendata);
1756 ret = _nfs4_recover_proc_open(opendata);
1759 newstate = nfs4_opendata_to_nfs4_state(opendata);
1760 if (IS_ERR(newstate))
1761 return PTR_ERR(newstate);
1762 if (newstate != opendata->state)
1764 nfs4_close_state(newstate, fmode);
1768 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1772 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1773 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1774 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1775 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1776 /* memory barrier prior to reading state->n_* */
1777 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1778 clear_bit(NFS_OPEN_STATE, &state->flags);
1780 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1783 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1786 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1790 * We may have performed cached opens for all three recoveries.
1791 * Check if we need to update the current stateid.
1793 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
1794 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
1795 write_seqlock(&state->seqlock);
1796 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1797 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1798 write_sequnlock(&state->seqlock);
1805 * reclaim state on the server after a reboot.
1807 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1809 struct nfs_delegation *delegation;
1810 struct nfs4_opendata *opendata;
1811 fmode_t delegation_type = 0;
1814 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1815 NFS4_OPEN_CLAIM_PREVIOUS);
1816 if (IS_ERR(opendata))
1817 return PTR_ERR(opendata);
1819 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1820 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
1821 delegation_type = delegation->type;
1823 opendata->o_arg.u.delegation_type = delegation_type;
1824 status = nfs4_open_recover(opendata, state);
1825 nfs4_opendata_put(opendata);
1829 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1831 struct nfs_server *server = NFS_SERVER(state->inode);
1832 struct nfs4_exception exception = { };
1835 err = _nfs4_do_open_reclaim(ctx, state);
1836 trace_nfs4_open_reclaim(ctx, 0, err);
1837 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1839 if (err != -NFS4ERR_DELAY)
1841 nfs4_handle_exception(server, err, &exception);
1842 } while (exception.retry);
1846 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1848 struct nfs_open_context *ctx;
1851 ctx = nfs4_state_find_open_context(state);
1854 ret = nfs4_do_open_reclaim(ctx, state);
1855 put_nfs_open_context(ctx);
1859 static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1863 printk(KERN_ERR "NFS: %s: unhandled error "
1864 "%d.\n", __func__, err);
1870 case -NFS4ERR_BADSESSION:
1871 case -NFS4ERR_BADSLOT:
1872 case -NFS4ERR_BAD_HIGH_SLOT:
1873 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1874 case -NFS4ERR_DEADSESSION:
1875 set_bit(NFS_DELEGATED_STATE, &state->flags);
1876 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1878 case -NFS4ERR_STALE_CLIENTID:
1879 case -NFS4ERR_STALE_STATEID:
1880 set_bit(NFS_DELEGATED_STATE, &state->flags);
1881 /* Don't recall a delegation if it was lost */
1882 nfs4_schedule_lease_recovery(server->nfs_client);
1884 case -NFS4ERR_MOVED:
1885 nfs4_schedule_migration_recovery(server);
1887 case -NFS4ERR_LEASE_MOVED:
1888 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1890 case -NFS4ERR_DELEG_REVOKED:
1891 case -NFS4ERR_ADMIN_REVOKED:
1892 case -NFS4ERR_EXPIRED:
1893 case -NFS4ERR_BAD_STATEID:
1894 case -NFS4ERR_OPENMODE:
1895 nfs_inode_find_state_and_recover(state->inode,
1897 nfs4_schedule_stateid_recovery(server, state);
1899 case -NFS4ERR_DELAY:
1900 case -NFS4ERR_GRACE:
1901 set_bit(NFS_DELEGATED_STATE, &state->flags);
1905 case -NFS4ERR_DENIED:
1906 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1912 int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1913 struct nfs4_state *state, const nfs4_stateid *stateid,
1916 struct nfs_server *server = NFS_SERVER(state->inode);
1917 struct nfs4_opendata *opendata;
1920 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1921 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1922 if (IS_ERR(opendata))
1923 return PTR_ERR(opendata);
1924 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1925 write_seqlock(&state->seqlock);
1926 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1927 write_sequnlock(&state->seqlock);
1928 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1929 switch (type & (FMODE_READ|FMODE_WRITE)) {
1930 case FMODE_READ|FMODE_WRITE:
1932 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1935 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1939 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1941 nfs4_opendata_put(opendata);
1942 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1945 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1947 struct nfs4_opendata *data = calldata;
1949 nfs4_setup_sequence(data->o_arg.server->nfs_client,
1950 &data->c_arg.seq_args, &data->c_res.seq_res, task);
1953 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1955 struct nfs4_opendata *data = calldata;
1957 nfs40_sequence_done(task, &data->c_res.seq_res);
1959 data->rpc_status = task->tk_status;
1960 if (data->rpc_status == 0) {
1961 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
1962 nfs_confirm_seqid(&data->owner->so_seqid, 0);
1963 renew_lease(data->o_res.server, data->timestamp);
1968 static void nfs4_open_confirm_release(void *calldata)
1970 struct nfs4_opendata *data = calldata;
1971 struct nfs4_state *state = NULL;
1973 /* If this request hasn't been cancelled, do nothing */
1974 if (data->cancelled == 0)
1976 /* In case of error, no cleanup! */
1977 if (!data->rpc_done)
1979 state = nfs4_opendata_to_nfs4_state(data);
1981 nfs4_close_state(state, data->o_arg.fmode);
1983 nfs4_opendata_put(data);
1986 static const struct rpc_call_ops nfs4_open_confirm_ops = {
1987 .rpc_call_prepare = nfs4_open_confirm_prepare,
1988 .rpc_call_done = nfs4_open_confirm_done,
1989 .rpc_release = nfs4_open_confirm_release,
1993 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1995 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1997 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
1998 struct rpc_task *task;
1999 struct rpc_message msg = {
2000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2001 .rpc_argp = &data->c_arg,
2002 .rpc_resp = &data->c_res,
2003 .rpc_cred = data->owner->so_cred,
2005 struct rpc_task_setup task_setup_data = {
2006 .rpc_client = server->client,
2007 .rpc_message = &msg,
2008 .callback_ops = &nfs4_open_confirm_ops,
2009 .callback_data = data,
2010 .workqueue = nfsiod_workqueue,
2011 .flags = RPC_TASK_ASYNC,
2015 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
2016 kref_get(&data->kref);
2018 data->rpc_status = 0;
2019 data->timestamp = jiffies;
2020 if (data->is_recover)
2021 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
2022 task = rpc_run_task(&task_setup_data);
2024 return PTR_ERR(task);
2025 status = rpc_wait_for_completion_task(task);
2027 data->cancelled = 1;
2030 status = data->rpc_status;
2035 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
2037 struct nfs4_opendata *data = calldata;
2038 struct nfs4_state_owner *sp = data->owner;
2039 struct nfs_client *clp = sp->so_server->nfs_client;
2040 enum open_claim_type4 claim = data->o_arg.claim;
2042 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
2045 * Check if we still need to send an OPEN call, or if we can use
2046 * a delegation instead.
2048 if (data->state != NULL) {
2049 struct nfs_delegation *delegation;
2051 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
2054 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2055 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
2056 goto unlock_no_action;
2059 /* Update client id. */
2060 data->o_arg.clientid = clp->cl_clientid;
2064 case NFS4_OPEN_CLAIM_PREVIOUS:
2065 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2066 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2067 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
2068 case NFS4_OPEN_CLAIM_FH:
2069 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
2070 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2072 data->timestamp = jiffies;
2073 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
2074 &data->o_arg.seq_args,
2075 &data->o_res.seq_res,
2077 nfs_release_seqid(data->o_arg.seqid);
2079 /* Set the create mode (note dependency on the session type) */
2080 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2081 if (data->o_arg.open_flags & O_EXCL) {
2082 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2083 if (nfs4_has_persistent_session(clp))
2084 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2085 else if (clp->cl_mvops->minor_version > 0)
2086 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2090 trace_nfs4_cached_open(data->state);
2093 task->tk_action = NULL;
2095 nfs4_sequence_done(task, &data->o_res.seq_res);
2098 static void nfs4_open_done(struct rpc_task *task, void *calldata)
2100 struct nfs4_opendata *data = calldata;
2102 data->rpc_status = task->tk_status;
2104 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
2107 if (task->tk_status == 0) {
2108 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2109 switch (data->o_res.f_attr->mode & S_IFMT) {
2113 data->rpc_status = -ELOOP;
2116 data->rpc_status = -EISDIR;
2119 data->rpc_status = -ENOTDIR;
2122 renew_lease(data->o_res.server, data->timestamp);
2123 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2124 nfs_confirm_seqid(&data->owner->so_seqid, 0);
2129 static void nfs4_open_release(void *calldata)
2131 struct nfs4_opendata *data = calldata;
2132 struct nfs4_state *state = NULL;
2134 /* If this request hasn't been cancelled, do nothing */
2135 if (data->cancelled == 0)
2137 /* In case of error, no cleanup! */
2138 if (data->rpc_status != 0 || !data->rpc_done)
2140 /* In case we need an open_confirm, no cleanup! */
2141 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2143 state = nfs4_opendata_to_nfs4_state(data);
2145 nfs4_close_state(state, data->o_arg.fmode);
2147 nfs4_opendata_put(data);
2150 static const struct rpc_call_ops nfs4_open_ops = {
2151 .rpc_call_prepare = nfs4_open_prepare,
2152 .rpc_call_done = nfs4_open_done,
2153 .rpc_release = nfs4_open_release,
2156 static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
2158 struct inode *dir = d_inode(data->dir);
2159 struct nfs_server *server = NFS_SERVER(dir);
2160 struct nfs_openargs *o_arg = &data->o_arg;
2161 struct nfs_openres *o_res = &data->o_res;
2162 struct rpc_task *task;
2163 struct rpc_message msg = {
2164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2167 .rpc_cred = data->owner->so_cred,
2169 struct rpc_task_setup task_setup_data = {
2170 .rpc_client = server->client,
2171 .rpc_message = &msg,
2172 .callback_ops = &nfs4_open_ops,
2173 .callback_data = data,
2174 .workqueue = nfsiod_workqueue,
2175 .flags = RPC_TASK_ASYNC,
2179 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
2180 kref_get(&data->kref);
2182 data->rpc_status = 0;
2183 data->cancelled = 0;
2184 data->is_recover = 0;
2186 nfs4_set_sequence_privileged(&o_arg->seq_args);
2187 data->is_recover = 1;
2189 task = rpc_run_task(&task_setup_data);
2191 return PTR_ERR(task);
2192 status = rpc_wait_for_completion_task(task);
2194 data->cancelled = 1;
2197 status = data->rpc_status;
2203 static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2205 struct inode *dir = d_inode(data->dir);
2206 struct nfs_openres *o_res = &data->o_res;
2209 status = nfs4_run_open_task(data, 1);
2210 if (status != 0 || !data->rpc_done)
2213 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2215 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
2216 status = _nfs4_proc_open_confirm(data);
2222 * Additional permission checks in order to distinguish between an
2223 * open for read, and an open for execute. This works around the
2224 * fact that NFSv4 OPEN treats read and execute permissions as being
2226 * Note that in the non-execute case, we want to turn off permission
2227 * checking if we just created a new file (POSIX open() semantics).
2229 static int nfs4_opendata_access(struct rpc_cred *cred,
2230 struct nfs4_opendata *opendata,
2231 struct nfs4_state *state, fmode_t fmode,
2234 struct nfs_access_entry cache;
2237 /* access call failed or for some reason the server doesn't
2238 * support any access modes -- defer access call until later */
2239 if (opendata->o_res.access_supported == 0)
2244 * Use openflags to check for exec, because fmode won't
2245 * always have FMODE_EXEC set when file open for exec.
2247 if (openflags & __FMODE_EXEC) {
2248 /* ONLY check for exec rights */
2250 } else if ((fmode & FMODE_READ) && !opendata->file_created)
2254 cache.jiffies = jiffies;
2255 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2256 nfs_access_add_cache(state->inode, &cache);
2258 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
2265 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2267 static int _nfs4_proc_open(struct nfs4_opendata *data)
2269 struct inode *dir = d_inode(data->dir);
2270 struct nfs_server *server = NFS_SERVER(dir);
2271 struct nfs_openargs *o_arg = &data->o_arg;
2272 struct nfs_openres *o_res = &data->o_res;
2275 status = nfs4_run_open_task(data, 0);
2276 if (!data->rpc_done)
2279 if (status == -NFS4ERR_BADNAME &&
2280 !(o_arg->open_flags & O_CREAT))
2285 nfs_fattr_map_and_free_names(server, &data->f_attr);
2287 if (o_arg->open_flags & O_CREAT) {
2288 if (o_arg->open_flags & O_EXCL)
2289 data->file_created = 1;
2290 else if (o_res->cinfo.before != o_res->cinfo.after)
2291 data->file_created = 1;
2292 if (data->file_created || dir->i_version != o_res->cinfo.after)
2293 update_changeattr(dir, &o_res->cinfo,
2294 o_res->f_attr->time_start);
2296 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2297 server->caps &= ~NFS_CAP_POSIX_LOCK;
2298 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2299 status = _nfs4_proc_open_confirm(data);
2303 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
2304 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
2310 * reclaim state on the server after a network partition.
2311 * Assumes caller holds the appropriate lock
2313 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2315 struct nfs4_opendata *opendata;
2318 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2319 NFS4_OPEN_CLAIM_FH);
2320 if (IS_ERR(opendata))
2321 return PTR_ERR(opendata);
2322 ret = nfs4_open_recover(opendata, state);
2324 d_drop(ctx->dentry);
2325 nfs4_opendata_put(opendata);
2329 static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
2331 struct nfs_server *server = NFS_SERVER(state->inode);
2332 struct nfs4_exception exception = { };
2336 err = _nfs4_open_expired(ctx, state);
2337 trace_nfs4_open_expired(ctx, 0, err);
2338 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2343 case -NFS4ERR_GRACE:
2344 case -NFS4ERR_DELAY:
2345 nfs4_handle_exception(server, err, &exception);
2348 } while (exception.retry);
2353 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2355 struct nfs_open_context *ctx;
2358 ctx = nfs4_state_find_open_context(state);
2361 ret = nfs4_do_open_expired(ctx, state);
2362 put_nfs_open_context(ctx);
2366 static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2367 const nfs4_stateid *stateid)
2369 nfs_remove_bad_delegation(state->inode, stateid);
2370 write_seqlock(&state->seqlock);
2371 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2372 write_sequnlock(&state->seqlock);
2373 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2376 static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2378 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2379 nfs_finish_clear_delegation_stateid(state, NULL);
2382 static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2384 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2385 nfs40_clear_delegation_stateid(state);
2386 return nfs4_open_expired(sp, state);
2389 static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2390 nfs4_stateid *stateid,
2391 struct rpc_cred *cred)
2393 return -NFS4ERR_BAD_STATEID;
2396 #if defined(CONFIG_NFS_V4_1)
2397 static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2398 nfs4_stateid *stateid,
2399 struct rpc_cred *cred)
2403 switch (stateid->type) {
2406 case NFS4_INVALID_STATEID_TYPE:
2407 case NFS4_SPECIAL_STATEID_TYPE:
2408 return -NFS4ERR_BAD_STATEID;
2409 case NFS4_REVOKED_STATEID_TYPE:
2413 status = nfs41_test_stateid(server, stateid, cred);
2415 case -NFS4ERR_EXPIRED:
2416 case -NFS4ERR_ADMIN_REVOKED:
2417 case -NFS4ERR_DELEG_REVOKED:
2423 /* Ack the revoked state to the server */
2424 nfs41_free_stateid(server, stateid, cred, true);
2425 return -NFS4ERR_EXPIRED;
2428 static void nfs41_check_delegation_stateid(struct nfs4_state *state)
2430 struct nfs_server *server = NFS_SERVER(state->inode);
2431 nfs4_stateid stateid;
2432 struct nfs_delegation *delegation;
2433 struct rpc_cred *cred;
2436 /* Get the delegation credential for use by test/free_stateid */
2438 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2439 if (delegation == NULL) {
2444 nfs4_stateid_copy(&stateid, &delegation->stateid);
2445 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) ||
2446 !test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2447 &delegation->flags)) {
2449 nfs_finish_clear_delegation_stateid(state, &stateid);
2453 cred = get_rpccred(delegation->cred);
2455 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
2456 trace_nfs4_test_delegation_stateid(state, NULL, status);
2457 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
2458 nfs_finish_clear_delegation_stateid(state, &stateid);
2464 * nfs41_check_expired_locks - possibly free a lock stateid
2466 * @state: NFSv4 state for an inode
2468 * Returns NFS_OK if recovery for this stateid is now finished.
2469 * Otherwise a negative NFS4ERR value is returned.
2471 static int nfs41_check_expired_locks(struct nfs4_state *state)
2473 int status, ret = NFS_OK;
2474 struct nfs4_lock_state *lsp, *prev = NULL;
2475 struct nfs_server *server = NFS_SERVER(state->inode);
2477 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2480 spin_lock(&state->state_lock);
2481 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2482 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2483 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2485 atomic_inc(&lsp->ls_count);
2486 spin_unlock(&state->state_lock);
2488 nfs4_put_lock_state(prev);
2491 status = nfs41_test_and_free_expired_stateid(server,
2494 trace_nfs4_test_lock_stateid(state, lsp, status);
2495 if (status == -NFS4ERR_EXPIRED ||
2496 status == -NFS4ERR_BAD_STATEID) {
2497 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
2498 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
2499 if (!recover_lost_locks)
2500 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2501 } else if (status != NFS_OK) {
2503 nfs4_put_lock_state(prev);
2506 spin_lock(&state->state_lock);
2509 spin_unlock(&state->state_lock);
2510 nfs4_put_lock_state(prev);
2516 * nfs41_check_open_stateid - possibly free an open stateid
2518 * @state: NFSv4 state for an inode
2520 * Returns NFS_OK if recovery for this stateid is now finished.
2521 * Otherwise a negative NFS4ERR value is returned.
2523 static int nfs41_check_open_stateid(struct nfs4_state *state)
2525 struct nfs_server *server = NFS_SERVER(state->inode);
2526 nfs4_stateid *stateid = &state->open_stateid;
2527 struct rpc_cred *cred = state->owner->so_cred;
2530 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
2531 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2532 if (nfs4_have_delegation(state->inode, state->state))
2534 return -NFS4ERR_OPENMODE;
2536 return -NFS4ERR_BAD_STATEID;
2538 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
2539 trace_nfs4_test_open_stateid(state, NULL, status);
2540 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
2541 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2542 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2543 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2544 clear_bit(NFS_OPEN_STATE, &state->flags);
2545 stateid->type = NFS4_INVALID_STATEID_TYPE;
2547 if (status != NFS_OK)
2549 if (nfs_open_stateid_recover_openmode(state))
2550 return -NFS4ERR_OPENMODE;
2554 static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2558 nfs41_check_delegation_stateid(state);
2559 status = nfs41_check_expired_locks(state);
2560 if (status != NFS_OK)
2562 status = nfs41_check_open_stateid(state);
2563 if (status != NFS_OK)
2564 status = nfs4_open_expired(sp, state);
2570 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2571 * fields corresponding to attributes that were used to store the verifier.
2572 * Make sure we clobber those fields in the later setattr call
2574 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2575 struct iattr *sattr, struct nfs4_label **label)
2577 const u32 *attrset = opendata->o_res.attrset;
2579 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2580 !(sattr->ia_valid & ATTR_ATIME_SET))
2581 sattr->ia_valid |= ATTR_ATIME;
2583 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2584 !(sattr->ia_valid & ATTR_MTIME_SET))
2585 sattr->ia_valid |= ATTR_MTIME;
2587 /* Except MODE, it seems harmless of setting twice. */
2588 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
2589 attrset[1] & FATTR4_WORD1_MODE)
2590 sattr->ia_valid &= ~ATTR_MODE;
2592 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2596 static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2599 struct nfs_open_context *ctx)
2601 struct nfs4_state_owner *sp = opendata->owner;
2602 struct nfs_server *server = sp->so_server;
2603 struct dentry *dentry;
2604 struct nfs4_state *state;
2608 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2610 ret = _nfs4_proc_open(opendata);
2614 state = nfs4_opendata_to_nfs4_state(opendata);
2615 ret = PTR_ERR(state);
2619 if (server->caps & NFS_CAP_POSIX_LOCK)
2620 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2621 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2622 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
2624 dentry = opendata->dentry;
2625 if (d_really_is_negative(dentry)) {
2626 struct dentry *alias;
2628 alias = d_exact_alias(dentry, state->inode);
2630 alias = d_splice_alias(igrab(state->inode), dentry);
2631 /* d_splice_alias() can't fail here - it's a non-directory */
2634 ctx->dentry = dentry = alias;
2636 nfs_set_verifier(dentry,
2637 nfs_save_change_attribute(d_inode(opendata->dir)));
2640 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2644 if (d_inode(dentry) == state->inode) {
2645 nfs_inode_attach_open_context(ctx);
2646 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2647 nfs4_schedule_stateid_recovery(server, state);
2654 * Returns a referenced nfs4_state
2656 static int _nfs4_do_open(struct inode *dir,
2657 struct nfs_open_context *ctx,
2659 struct iattr *sattr,
2660 struct nfs4_label *label,
2663 struct nfs4_state_owner *sp;
2664 struct nfs4_state *state = NULL;
2665 struct nfs_server *server = NFS_SERVER(dir);
2666 struct nfs4_opendata *opendata;
2667 struct dentry *dentry = ctx->dentry;
2668 struct rpc_cred *cred = ctx->cred;
2669 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2670 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
2671 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
2672 struct nfs4_label *olabel = NULL;
2675 /* Protect against reboot recovery conflicts */
2677 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2679 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2682 status = nfs4_client_recover_expired_lease(server->nfs_client);
2684 goto err_put_state_owner;
2685 if (d_really_is_positive(dentry))
2686 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
2688 if (d_really_is_positive(dentry))
2689 claim = NFS4_OPEN_CLAIM_FH;
2690 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
2691 label, claim, GFP_KERNEL);
2692 if (opendata == NULL)
2693 goto err_put_state_owner;
2696 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2697 if (IS_ERR(olabel)) {
2698 status = PTR_ERR(olabel);
2699 goto err_opendata_put;
2703 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2704 if (!opendata->f_attr.mdsthreshold) {
2705 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2706 if (!opendata->f_attr.mdsthreshold)
2707 goto err_free_label;
2709 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
2711 if (d_really_is_positive(dentry))
2712 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
2714 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
2716 goto err_free_label;
2719 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
2720 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
2721 nfs4_exclusive_attrset(opendata, sattr, &label);
2723 * send create attributes which was not set by open
2724 * with an extra setattr.
2726 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2727 nfs_fattr_init(opendata->o_res.f_attr);
2728 status = nfs4_do_setattr(state->inode, cred,
2729 opendata->o_res.f_attr, sattr,
2730 ctx, label, olabel);
2732 nfs_setattr_update_inode(state->inode, sattr,
2733 opendata->o_res.f_attr);
2734 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2738 if (opened && opendata->file_created)
2739 *opened |= FILE_CREATED;
2741 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
2742 *ctx_th = opendata->f_attr.mdsthreshold;
2743 opendata->f_attr.mdsthreshold = NULL;
2746 nfs4_label_free(olabel);
2748 nfs4_opendata_put(opendata);
2749 nfs4_put_state_owner(sp);
2752 nfs4_label_free(olabel);
2754 nfs4_opendata_put(opendata);
2755 err_put_state_owner:
2756 nfs4_put_state_owner(sp);
2762 static struct nfs4_state *nfs4_do_open(struct inode *dir,
2763 struct nfs_open_context *ctx,
2765 struct iattr *sattr,
2766 struct nfs4_label *label,
2769 struct nfs_server *server = NFS_SERVER(dir);
2770 struct nfs4_exception exception = { };
2771 struct nfs4_state *res;
2775 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
2777 trace_nfs4_open_file(ctx, flags, status);
2780 /* NOTE: BAD_SEQID means the server and client disagree about the
2781 * book-keeping w.r.t. state-changing operations
2782 * (OPEN/CLOSE/LOCK/LOCKU...)
2783 * It is actually a sign of a bug on the client or on the server.
2785 * If we receive a BAD_SEQID error in the particular case of
2786 * doing an OPEN, we assume that nfs_increment_open_seqid() will
2787 * have unhashed the old state_owner for us, and that we can
2788 * therefore safely retry using a new one. We should still warn
2789 * the user though...
2791 if (status == -NFS4ERR_BAD_SEQID) {
2792 pr_warn_ratelimited("NFS: v4 server %s "
2793 " returned a bad sequence-id error!\n",
2794 NFS_SERVER(dir)->nfs_client->cl_hostname);
2795 exception.retry = 1;
2799 * BAD_STATEID on OPEN means that the server cancelled our
2800 * state before it received the OPEN_CONFIRM.
2801 * Recover by retrying the request as per the discussion
2802 * on Page 181 of RFC3530.
2804 if (status == -NFS4ERR_BAD_STATEID) {
2805 exception.retry = 1;
2808 if (status == -EAGAIN) {
2809 /* We must have found a delegation */
2810 exception.retry = 1;
2813 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2815 res = ERR_PTR(nfs4_handle_exception(server,
2816 status, &exception));
2817 } while (exception.retry);
2821 static int _nfs4_do_setattr(struct inode *inode,
2822 struct nfs_setattrargs *arg,
2823 struct nfs_setattrres *res,
2824 struct rpc_cred *cred,
2825 struct nfs_open_context *ctx)
2827 struct nfs_server *server = NFS_SERVER(inode);
2828 struct rpc_message msg = {
2829 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2834 struct rpc_cred *delegation_cred = NULL;
2835 unsigned long timestamp = jiffies;
2840 nfs_fattr_init(res->fattr);
2842 /* Servers should only apply open mode checks for file size changes */
2843 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
2844 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2846 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
2847 /* Use that stateid */
2848 } else if (truncate && ctx != NULL) {
2849 struct nfs_lock_context *l_ctx;
2850 if (!nfs4_valid_open_stateid(ctx->state))
2852 l_ctx = nfs_get_lock_context(ctx);
2854 return PTR_ERR(l_ctx);
2855 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2856 &arg->stateid, &delegation_cred);
2857 nfs_put_lock_context(l_ctx);
2861 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
2862 if (delegation_cred)
2863 msg.rpc_cred = delegation_cred;
2865 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
2867 put_rpccred(delegation_cred);
2868 if (status == 0 && ctx != NULL)
2869 renew_lease(server, timestamp);
2870 trace_nfs4_setattr(inode, &arg->stateid, status);
2874 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2875 struct nfs_fattr *fattr, struct iattr *sattr,
2876 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
2877 struct nfs4_label *olabel)
2879 struct nfs_server *server = NFS_SERVER(inode);
2880 struct nfs4_state *state = ctx ? ctx->state : NULL;
2881 struct nfs_setattrargs arg = {
2882 .fh = NFS_FH(inode),
2885 .bitmask = server->attr_bitmask,
2888 struct nfs_setattrres res = {
2893 struct nfs4_exception exception = {
2896 .stateid = &arg.stateid,
2900 arg.bitmask = nfs4_bitmask(server, ilabel);
2902 arg.bitmask = nfs4_bitmask(server, olabel);
2905 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
2907 case -NFS4ERR_OPENMODE:
2908 if (!(sattr->ia_valid & ATTR_SIZE)) {
2909 pr_warn_once("NFSv4: server %s is incorrectly "
2910 "applying open mode checks to "
2911 "a SETATTR that is not "
2912 "changing file size.\n",
2913 server->nfs_client->cl_hostname);
2915 if (state && !(state->state & FMODE_WRITE)) {
2917 if (sattr->ia_valid & ATTR_OPEN)
2922 err = nfs4_handle_exception(server, err, &exception);
2923 } while (exception.retry);
2929 nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2931 if (inode == NULL || !nfs_have_layout(inode))
2934 return pnfs_wait_on_layoutreturn(inode, task);
2937 struct nfs4_closedata {
2938 struct inode *inode;
2939 struct nfs4_state *state;
2940 struct nfs_closeargs arg;
2941 struct nfs_closeres res;
2943 struct nfs4_layoutreturn_args arg;
2944 struct nfs4_layoutreturn_res res;
2945 struct nfs4_xdr_opaque_data ld_private;
2949 struct nfs_fattr fattr;
2950 unsigned long timestamp;
2953 static void nfs4_free_closedata(void *data)
2955 struct nfs4_closedata *calldata = data;
2956 struct nfs4_state_owner *sp = calldata->state->owner;
2957 struct super_block *sb = calldata->state->inode->i_sb;
2959 if (calldata->lr.roc)
2960 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
2961 calldata->res.lr_ret);
2962 nfs4_put_open_state(calldata->state);
2963 nfs_free_seqid(calldata->arg.seqid);
2964 nfs4_put_state_owner(sp);
2965 nfs_sb_deactive(sb);
2969 static void nfs4_close_done(struct rpc_task *task, void *data)
2971 struct nfs4_closedata *calldata = data;
2972 struct nfs4_state *state = calldata->state;
2973 struct nfs_server *server = NFS_SERVER(calldata->inode);
2974 nfs4_stateid *res_stateid = NULL;
2976 dprintk("%s: begin!\n", __func__);
2977 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2979 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
2981 /* Handle Layoutreturn errors */
2982 if (calldata->arg.lr_args && task->tk_status != 0) {
2983 switch (calldata->res.lr_ret) {
2985 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
2988 calldata->arg.lr_args = NULL;
2989 calldata->res.lr_res = NULL;
2991 case -NFS4ERR_ADMIN_REVOKED:
2992 case -NFS4ERR_DELEG_REVOKED:
2993 case -NFS4ERR_EXPIRED:
2994 case -NFS4ERR_BAD_STATEID:
2995 case -NFS4ERR_OLD_STATEID:
2996 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
2997 case -NFS4ERR_WRONG_CRED:
2998 calldata->arg.lr_args = NULL;
2999 calldata->res.lr_res = NULL;
3000 calldata->res.lr_ret = 0;
3001 rpc_restart_call_prepare(task);
3006 /* hmm. we are done with the inode, and in the process of freeing
3007 * the state_owner. we keep this around to process errors
3009 switch (task->tk_status) {
3011 res_stateid = &calldata->res.stateid;
3012 renew_lease(server, calldata->timestamp);
3014 case -NFS4ERR_ACCESS:
3015 if (calldata->arg.bitmask != NULL) {
3016 calldata->arg.bitmask = NULL;
3017 calldata->res.fattr = NULL;
3018 task->tk_status = 0;
3019 rpc_restart_call_prepare(task);
3024 case -NFS4ERR_ADMIN_REVOKED:
3025 case -NFS4ERR_STALE_STATEID:
3026 case -NFS4ERR_EXPIRED:
3027 nfs4_free_revoked_stateid(server,
3028 &calldata->arg.stateid,
3029 task->tk_msg.rpc_cred);
3030 case -NFS4ERR_OLD_STATEID:
3031 case -NFS4ERR_BAD_STATEID:
3032 if (!nfs4_stateid_match(&calldata->arg.stateid,
3033 &state->open_stateid)) {
3034 rpc_restart_call_prepare(task);
3037 if (calldata->arg.fmode == 0)
3040 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
3041 rpc_restart_call_prepare(task);
3045 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3046 res_stateid, calldata->arg.fmode);
3048 nfs_release_seqid(calldata->arg.seqid);
3049 nfs_refresh_inode(calldata->inode, &calldata->fattr);
3050 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
3053 static void nfs4_close_prepare(struct rpc_task *task, void *data)
3055 struct nfs4_closedata *calldata = data;
3056 struct nfs4_state *state = calldata->state;
3057 struct inode *inode = calldata->inode;
3058 bool is_rdonly, is_wronly, is_rdwr;
3061 dprintk("%s: begin!\n", __func__);
3062 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3065 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
3066 spin_lock(&state->owner->so_lock);
3067 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3068 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3069 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
3070 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
3071 /* Calculate the change in open mode */
3072 calldata->arg.fmode = 0;
3073 if (state->n_rdwr == 0) {
3074 if (state->n_rdonly == 0)
3075 call_close |= is_rdonly;
3077 calldata->arg.fmode |= FMODE_READ;
3078 if (state->n_wronly == 0)
3079 call_close |= is_wronly;
3081 calldata->arg.fmode |= FMODE_WRITE;
3082 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3083 call_close |= is_rdwr;
3085 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3087 if (!nfs4_valid_open_stateid(state) ||
3088 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
3090 spin_unlock(&state->owner->so_lock);
3093 /* Note: exit _without_ calling nfs4_close_done */
3097 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
3098 nfs_release_seqid(calldata->arg.seqid);
3102 if (calldata->arg.fmode == 0)
3103 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3105 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3106 /* Close-to-open cache consistency revalidation */
3107 if (!nfs4_have_delegation(inode, FMODE_READ))
3108 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3110 calldata->arg.bitmask = NULL;
3113 calldata->arg.share_access =
3114 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3115 calldata->arg.fmode, 0);
3117 if (calldata->res.fattr == NULL)
3118 calldata->arg.bitmask = NULL;
3119 else if (calldata->arg.bitmask == NULL)
3120 calldata->res.fattr = NULL;
3121 calldata->timestamp = jiffies;
3122 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
3123 &calldata->arg.seq_args,
3124 &calldata->res.seq_res,
3126 nfs_release_seqid(calldata->arg.seqid);
3127 dprintk("%s: done!\n", __func__);
3130 task->tk_action = NULL;
3132 nfs4_sequence_done(task, &calldata->res.seq_res);
3135 static const struct rpc_call_ops nfs4_close_ops = {
3136 .rpc_call_prepare = nfs4_close_prepare,
3137 .rpc_call_done = nfs4_close_done,
3138 .rpc_release = nfs4_free_closedata,
3142 * It is possible for data to be read/written from a mem-mapped file
3143 * after the sys_close call (which hits the vfs layer as a flush).
3144 * This means that we can't safely call nfsv4 close on a file until
3145 * the inode is cleared. This in turn means that we are not good
3146 * NFSv4 citizens - we do not indicate to the server to update the file's
3147 * share state even when we are done with one of the three share
3148 * stateid's in the inode.
3150 * NOTE: Caller must be holding the sp->so_owner semaphore!
3152 int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
3154 struct nfs_server *server = NFS_SERVER(state->inode);
3155 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
3156 struct nfs4_closedata *calldata;
3157 struct nfs4_state_owner *sp = state->owner;
3158 struct rpc_task *task;
3159 struct rpc_message msg = {
3160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3161 .rpc_cred = state->owner->so_cred,
3163 struct rpc_task_setup task_setup_data = {
3164 .rpc_client = server->client,
3165 .rpc_message = &msg,
3166 .callback_ops = &nfs4_close_ops,
3167 .workqueue = nfsiod_workqueue,
3168 .flags = RPC_TASK_ASYNC,
3170 int status = -ENOMEM;
3172 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3173 &task_setup_data.rpc_client, &msg);
3175 calldata = kzalloc(sizeof(*calldata), gfp_mask);
3176 if (calldata == NULL)
3178 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
3179 calldata->inode = state->inode;
3180 calldata->state = state;
3181 calldata->arg.fh = NFS_FH(state->inode);
3182 /* Serialization for the sequence id */
3183 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3184 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
3185 if (IS_ERR(calldata->arg.seqid))
3186 goto out_free_calldata;
3187 nfs_fattr_init(&calldata->fattr);
3188 calldata->arg.fmode = 0;
3189 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
3190 calldata->res.fattr = &calldata->fattr;
3191 calldata->res.seqid = calldata->arg.seqid;
3192 calldata->res.server = server;
3193 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3194 calldata->lr.roc = pnfs_roc(state->inode,
3195 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3196 if (calldata->lr.roc) {
3197 calldata->arg.lr_args = &calldata->lr.arg;
3198 calldata->res.lr_res = &calldata->lr.res;
3200 nfs_sb_active(calldata->inode->i_sb);
3202 msg.rpc_argp = &calldata->arg;
3203 msg.rpc_resp = &calldata->res;
3204 task_setup_data.callback_data = calldata;
3205 task = rpc_run_task(&task_setup_data);
3207 return PTR_ERR(task);
3210 status = rpc_wait_for_completion_task(task);
3216 nfs4_put_open_state(state);
3217 nfs4_put_state_owner(sp);
3221 static struct inode *
3222 nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3223 int open_flags, struct iattr *attr, int *opened)
3225 struct nfs4_state *state;
3226 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3228 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
3230 /* Protect against concurrent sillydeletes */
3231 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
3233 nfs4_label_release_security(label);
3236 return ERR_CAST(state);
3237 return state->inode;
3240 static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
3242 if (ctx->state == NULL)
3245 nfs4_close_sync(ctx->state, ctx->mode);
3247 nfs4_close_state(ctx->state, ctx->mode);
3250 #define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3251 #define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
3252 #define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
3254 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3256 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
3257 struct nfs4_server_caps_arg args = {
3261 struct nfs4_server_caps_res res = {};
3262 struct rpc_message msg = {
3263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
3269 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3270 FATTR4_WORD0_FH_EXPIRE_TYPE |
3271 FATTR4_WORD0_LINK_SUPPORT |
3272 FATTR4_WORD0_SYMLINK_SUPPORT |
3273 FATTR4_WORD0_ACLSUPPORT;
3275 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3277 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3279 /* Sanity check the server answers */
3280 switch (minorversion) {
3282 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3283 res.attr_bitmask[2] = 0;
3286 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3289 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3291 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
3292 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3293 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3294 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3295 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
3296 NFS_CAP_CTIME|NFS_CAP_MTIME|
3297 NFS_CAP_SECURITY_LABEL);
3298 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3299 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3300 server->caps |= NFS_CAP_ACLS;
3301 if (res.has_links != 0)
3302 server->caps |= NFS_CAP_HARDLINKS;
3303 if (res.has_symlinks != 0)
3304 server->caps |= NFS_CAP_SYMLINKS;
3305 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3306 server->caps |= NFS_CAP_FILEID;
3307 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3308 server->caps |= NFS_CAP_MODE;
3309 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3310 server->caps |= NFS_CAP_NLINK;
3311 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3312 server->caps |= NFS_CAP_OWNER;
3313 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3314 server->caps |= NFS_CAP_OWNER_GROUP;
3315 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3316 server->caps |= NFS_CAP_ATIME;
3317 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3318 server->caps |= NFS_CAP_CTIME;
3319 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3320 server->caps |= NFS_CAP_MTIME;
3321 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
3322 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3323 server->caps |= NFS_CAP_SECURITY_LABEL;
3325 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3326 sizeof(server->attr_bitmask));
3327 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
3329 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3330 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3331 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
3332 server->cache_consistency_bitmask[2] = 0;
3333 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3334 sizeof(server->exclcreat_bitmask));
3335 server->acl_bitmask = res.acl_bitmask;
3336 server->fh_expire_type = res.fh_expire_type;
3342 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3344 struct nfs4_exception exception = { };
3347 err = nfs4_handle_exception(server,
3348 _nfs4_server_capabilities(server, fhandle),
3350 } while (exception.retry);
3354 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3355 struct nfs_fsinfo *info)
3358 struct nfs4_lookup_root_arg args = {
3361 struct nfs4_lookup_res res = {
3363 .fattr = info->fattr,
3366 struct rpc_message msg = {
3367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3372 bitmask[0] = nfs4_fattr_bitmap[0];
3373 bitmask[1] = nfs4_fattr_bitmap[1];
3375 * Process the label in the upcoming getfattr
3377 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3379 nfs_fattr_init(info->fattr);
3380 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3383 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3384 struct nfs_fsinfo *info)
3386 struct nfs4_exception exception = { };
3389 err = _nfs4_lookup_root(server, fhandle, info);
3390 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
3393 case -NFS4ERR_WRONGSEC:
3396 err = nfs4_handle_exception(server, err, &exception);
3398 } while (exception.retry);
3403 static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3404 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3406 struct rpc_auth_create_args auth_args = {
3407 .pseudoflavor = flavor,
3409 struct rpc_auth *auth;
3411 auth = rpcauth_create(&auth_args, server->client);
3414 return nfs4_lookup_root(server, fhandle, info);
3418 * Retry pseudoroot lookup with various security flavors. We do this when:
3420 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3421 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3423 * Returns zero on success, or a negative NFS4ERR value, or a
3424 * negative errno value.
3426 static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3427 struct nfs_fsinfo *info)
3429 /* Per 3530bis 15.33.5 */
3430 static const rpc_authflavor_t flav_array[] = {
3434 RPC_AUTH_UNIX, /* courtesy */
3437 int status = -EPERM;
3440 if (server->auth_info.flavor_len > 0) {
3441 /* try each flavor specified by user */
3442 for (i = 0; i < server->auth_info.flavor_len; i++) {
3443 status = nfs4_lookup_root_sec(server, fhandle, info,
3444 server->auth_info.flavors[i]);
3445 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3450 /* no flavors specified by user, try default list */
3451 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3452 status = nfs4_lookup_root_sec(server, fhandle, info,
3454 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3461 * -EACCESS could mean that the user doesn't have correct permissions
3462 * to access the mount. It could also mean that we tried to mount
3463 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3464 * existing mount programs don't handle -EACCES very well so it should
3465 * be mapped to -EPERM instead.
3467 if (status == -EACCES)
3473 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3474 * @server: initialized nfs_server handle
3475 * @fhandle: we fill in the pseudo-fs root file handle
3476 * @info: we fill in an FSINFO struct
3477 * @auth_probe: probe the auth flavours
3479 * Returns zero on success, or a negative errno.
3481 int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
3482 struct nfs_fsinfo *info,
3488 status = nfs4_lookup_root(server, fhandle, info);
3490 if (auth_probe || status == NFS4ERR_WRONGSEC)
3491 status = server->nfs_client->cl_mvops->find_root_sec(server,
3495 status = nfs4_server_capabilities(server, fhandle);
3497 status = nfs4_do_fsinfo(server, fhandle, info);
3499 return nfs4_map_errors(status);
3502 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3503 struct nfs_fsinfo *info)
3506 struct nfs_fattr *fattr = info->fattr;
3507 struct nfs4_label *label = NULL;
3509 error = nfs4_server_capabilities(server, mntfh);
3511 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3515 label = nfs4_label_alloc(server, GFP_KERNEL);
3517 return PTR_ERR(label);
3519 error = nfs4_proc_getattr(server, mntfh, fattr, label);
3521 dprintk("nfs4_get_root: getattr error = %d\n", -error);
3522 goto err_free_label;
3525 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3526 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3527 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3530 nfs4_label_free(label);
3536 * Get locations and (maybe) other attributes of a referral.
3537 * Note that we'll actually follow the referral later when
3538 * we detect fsid mismatch in inode revalidation
3540 static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3541 const struct qstr *name, struct nfs_fattr *fattr,
3542 struct nfs_fh *fhandle)
3544 int status = -ENOMEM;
3545 struct page *page = NULL;
3546 struct nfs4_fs_locations *locations = NULL;
3548 page = alloc_page(GFP_KERNEL);
3551 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3552 if (locations == NULL)
3555 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
3560 * If the fsid didn't change, this is a migration event, not a
3561 * referral. Cause us to drop into the exception handler, which
3562 * will kick off migration recovery.
3564 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
3565 dprintk("%s: server did not return a different fsid for"
3566 " a referral at %s\n", __func__, name->name);
3567 status = -NFS4ERR_MOVED;
3570 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3571 nfs_fixup_referral_attributes(&locations->fattr);
3573 /* replace the lookup nfs_fattr with the locations nfs_fattr */
3574 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
3575 memset(fhandle, 0, sizeof(struct nfs_fh));
3583 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3584 struct nfs_fattr *fattr, struct nfs4_label *label)
3586 struct nfs4_getattr_arg args = {
3588 .bitmask = server->attr_bitmask,
3590 struct nfs4_getattr_res res = {
3595 struct rpc_message msg = {
3596 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3601 args.bitmask = nfs4_bitmask(server, label);
3603 nfs_fattr_init(fattr);
3604 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3607 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3608 struct nfs_fattr *fattr, struct nfs4_label *label)
3610 struct nfs4_exception exception = { };
3613 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3614 trace_nfs4_getattr(server, fhandle, fattr, err);
3615 err = nfs4_handle_exception(server, err,
3617 } while (exception.retry);
3622 * The file is not closed if it is opened due to the a request to change
3623 * the size of the file. The open call will not be needed once the
3624 * VFS layer lookup-intents are implemented.
3626 * Close is called when the inode is destroyed.
3627 * If we haven't opened the file for O_WRONLY, we
3628 * need to in the size_change case to obtain a stateid.
3631 * Because OPEN is always done by name in nfsv4, it is
3632 * possible that we opened a different file by the same
3633 * name. We can recognize this race condition, but we
3634 * can't do anything about it besides returning an error.
3636 * This will be fixed with VFS changes (lookup-intent).
3639 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3640 struct iattr *sattr)
3642 struct inode *inode = d_inode(dentry);
3643 struct rpc_cred *cred = NULL;
3644 struct nfs_open_context *ctx = NULL;
3645 struct nfs4_label *label = NULL;
3648 if (pnfs_ld_layoutret_on_setattr(inode) &&
3649 sattr->ia_valid & ATTR_SIZE &&
3650 sattr->ia_size < i_size_read(inode))
3651 pnfs_commit_and_return_layout(inode);
3653 nfs_fattr_init(fattr);
3655 /* Deal with open(O_TRUNC) */
3656 if (sattr->ia_valid & ATTR_OPEN)
3657 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
3659 /* Optimization: if the end result is no change, don't RPC */
3660 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
3663 /* Search for an existing open(O_WRITE) file */
3664 if (sattr->ia_valid & ATTR_FILE) {
3666 ctx = nfs_file_open_context(sattr->ia_file);
3671 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3673 return PTR_ERR(label);
3675 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
3677 nfs_setattr_update_inode(inode, sattr, fattr);
3678 nfs_setsecurity(inode, fattr, label);
3680 nfs4_label_free(label);
3684 static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3685 const struct qstr *name, struct nfs_fh *fhandle,
3686 struct nfs_fattr *fattr, struct nfs4_label *label)
3688 struct nfs_server *server = NFS_SERVER(dir);
3690 struct nfs4_lookup_arg args = {
3691 .bitmask = server->attr_bitmask,
3692 .dir_fh = NFS_FH(dir),
3695 struct nfs4_lookup_res res = {
3701 struct rpc_message msg = {
3702 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3707 args.bitmask = nfs4_bitmask(server, label);
3709 nfs_fattr_init(fattr);
3711 dprintk("NFS call lookup %s\n", name->name);
3712 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
3713 dprintk("NFS reply lookup: %d\n", status);
3717 static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
3719 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
3720 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
3721 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3725 static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3726 const struct qstr *name, struct nfs_fh *fhandle,
3727 struct nfs_fattr *fattr, struct nfs4_label *label)
3729 struct nfs4_exception exception = { };
3730 struct rpc_clnt *client = *clnt;
3733 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
3734 trace_nfs4_lookup(dir, name, err);
3736 case -NFS4ERR_BADNAME:
3739 case -NFS4ERR_MOVED:
3740 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
3741 if (err == -NFS4ERR_MOVED)
3742 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3744 case -NFS4ERR_WRONGSEC:
3746 if (client != *clnt)
3748 client = nfs4_negotiate_security(client, dir, name);
3750 return PTR_ERR(client);
3752 exception.retry = 1;
3755 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
3757 } while (exception.retry);
3762 else if (client != *clnt)
3763 rpc_shutdown_client(client);
3768 static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
3769 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3770 struct nfs4_label *label)
3773 struct rpc_clnt *client = NFS_CLIENT(dir);
3775 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
3776 if (client != NFS_CLIENT(dir)) {
3777 rpc_shutdown_client(client);
3778 nfs_fixup_secinfo_attributes(fattr);
3784 nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
3785 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3787 struct rpc_clnt *client = NFS_CLIENT(dir);
3790 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
3792 return ERR_PTR(status);
3793 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
3796 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3798 struct nfs_server *server = NFS_SERVER(inode);
3799 struct nfs4_accessargs args = {
3800 .fh = NFS_FH(inode),
3801 .bitmask = server->cache_consistency_bitmask,
3803 struct nfs4_accessres res = {
3806 struct rpc_message msg = {
3807 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3810 .rpc_cred = entry->cred,
3812 int mode = entry->mask;
3816 * Determine which access bits we want to ask for...
3818 if (mode & MAY_READ)
3819 args.access |= NFS4_ACCESS_READ;
3820 if (S_ISDIR(inode->i_mode)) {
3821 if (mode & MAY_WRITE)
3822 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3823 if (mode & MAY_EXEC)
3824 args.access |= NFS4_ACCESS_LOOKUP;
3826 if (mode & MAY_WRITE)
3827 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3828 if (mode & MAY_EXEC)
3829 args.access |= NFS4_ACCESS_EXECUTE;
3832 res.fattr = nfs_alloc_fattr();
3833 if (res.fattr == NULL)
3836 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
3838 nfs_access_set_mask(entry, res.access);
3839 nfs_refresh_inode(inode, res.fattr);
3841 nfs_free_fattr(res.fattr);
3845 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3847 struct nfs4_exception exception = { };
3850 err = _nfs4_proc_access(inode, entry);
3851 trace_nfs4_access(inode, err);
3852 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3854 } while (exception.retry);
3859 * TODO: For the time being, we don't try to get any attributes
3860 * along with any of the zero-copy operations READ, READDIR,
3863 * In the case of the first three, we want to put the GETATTR
3864 * after the read-type operation -- this is because it is hard
3865 * to predict the length of a GETATTR response in v4, and thus
3866 * align the READ data correctly. This means that the GETATTR
3867 * may end up partially falling into the page cache, and we should
3868 * shift it into the 'tail' of the xdr_buf before processing.
3869 * To do this efficiently, we need to know the total length
3870 * of data received, which doesn't seem to be available outside
3873 * In the case of WRITE, we also want to put the GETATTR after
3874 * the operation -- in this case because we want to make sure
3875 * we get the post-operation mtime and size.
3877 * Both of these changes to the XDR layer would in fact be quite
3878 * minor, but I decided to leave them for a subsequent patch.
3880 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3881 unsigned int pgbase, unsigned int pglen)
3883 struct nfs4_readlink args = {
3884 .fh = NFS_FH(inode),
3889 struct nfs4_readlink_res res;
3890 struct rpc_message msg = {
3891 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3896 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
3899 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3900 unsigned int pgbase, unsigned int pglen)
3902 struct nfs4_exception exception = { };
3905 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3906 trace_nfs4_readlink(inode, err);
3907 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3909 } while (exception.retry);
3914 * This is just for mknod. open(O_CREAT) will always do ->open_context().
3917 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
3920 struct nfs_server *server = NFS_SERVER(dir);
3921 struct nfs4_label l, *ilabel = NULL;
3922 struct nfs_open_context *ctx;
3923 struct nfs4_state *state;
3926 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
3928 return PTR_ERR(ctx);
3930 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3932 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
3933 sattr->ia_mode &= ~current_umask();
3934 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
3935 if (IS_ERR(state)) {
3936 status = PTR_ERR(state);
3940 nfs4_label_release_security(ilabel);
3941 put_nfs_open_context(ctx);
3945 static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
3947 struct nfs_server *server = NFS_SERVER(dir);
3948 struct nfs_removeargs args = {
3952 struct nfs_removeres res = {
3955 struct rpc_message msg = {
3956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3960 unsigned long timestamp = jiffies;
3963 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
3965 update_changeattr(dir, &res.cinfo, timestamp);
3969 static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
3971 struct nfs4_exception exception = { };
3974 err = _nfs4_proc_remove(dir, name);
3975 trace_nfs4_remove(dir, name, err);
3976 err = nfs4_handle_exception(NFS_SERVER(dir), err,
3978 } while (exception.retry);
3982 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
3984 struct nfs_server *server = NFS_SERVER(dir);
3985 struct nfs_removeargs *args = msg->rpc_argp;
3986 struct nfs_removeres *res = msg->rpc_resp;
3988 res->server = server;
3989 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
3990 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
3992 nfs_fattr_init(res->dir_attr);
3995 static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3997 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
3998 &data->args.seq_args,
4003 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
4005 struct nfs_unlinkdata *data = task->tk_calldata;
4006 struct nfs_removeres *res = &data->res;
4008 if (!nfs4_sequence_done(task, &res->seq_res))
4010 if (nfs4_async_handle_error(task, res->server, NULL,
4011 &data->timeout) == -EAGAIN)
4013 if (task->tk_status == 0)
4014 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
4018 static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4020 struct nfs_server *server = NFS_SERVER(dir);
4021 struct nfs_renameargs *arg = msg->rpc_argp;
4022 struct nfs_renameres *res = msg->rpc_resp;
4024 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
4025 res->server = server;
4026 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
4029 static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4031 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
4032 &data->args.seq_args,
4037 static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4038 struct inode *new_dir)
4040 struct nfs_renamedata *data = task->tk_calldata;
4041 struct nfs_renameres *res = &data->res;
4043 if (!nfs4_sequence_done(task, &res->seq_res))
4045 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
4048 if (task->tk_status == 0) {
4049 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
4050 if (new_dir != old_dir)
4051 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
4056 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4058 struct nfs_server *server = NFS_SERVER(inode);
4059 struct nfs4_link_arg arg = {
4060 .fh = NFS_FH(inode),
4061 .dir_fh = NFS_FH(dir),
4063 .bitmask = server->attr_bitmask,
4065 struct nfs4_link_res res = {
4069 struct rpc_message msg = {
4070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4074 int status = -ENOMEM;
4076 res.fattr = nfs_alloc_fattr();
4077 if (res.fattr == NULL)
4080 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4081 if (IS_ERR(res.label)) {
4082 status = PTR_ERR(res.label);
4085 arg.bitmask = nfs4_bitmask(server, res.label);
4087 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
4089 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
4090 status = nfs_post_op_update_inode(inode, res.fattr);
4092 nfs_setsecurity(inode, res.fattr, res.label);
4096 nfs4_label_free(res.label);
4099 nfs_free_fattr(res.fattr);
4103 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
4105 struct nfs4_exception exception = { };
4108 err = nfs4_handle_exception(NFS_SERVER(inode),
4109 _nfs4_proc_link(inode, dir, name),
4111 } while (exception.retry);
4115 struct nfs4_createdata {
4116 struct rpc_message msg;
4117 struct nfs4_create_arg arg;
4118 struct nfs4_create_res res;
4120 struct nfs_fattr fattr;
4121 struct nfs4_label *label;
4124 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
4125 const struct qstr *name, struct iattr *sattr, u32 ftype)
4127 struct nfs4_createdata *data;
4129 data = kzalloc(sizeof(*data), GFP_KERNEL);
4131 struct nfs_server *server = NFS_SERVER(dir);
4133 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4134 if (IS_ERR(data->label))
4137 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4138 data->msg.rpc_argp = &data->arg;
4139 data->msg.rpc_resp = &data->res;
4140 data->arg.dir_fh = NFS_FH(dir);
4141 data->arg.server = server;
4142 data->arg.name = name;
4143 data->arg.attrs = sattr;
4144 data->arg.ftype = ftype;
4145 data->arg.bitmask = nfs4_bitmask(server, data->label);
4146 data->arg.umask = current_umask();
4147 data->res.server = server;
4148 data->res.fh = &data->fh;
4149 data->res.fattr = &data->fattr;
4150 data->res.label = data->label;
4151 nfs_fattr_init(data->res.fattr);
4159 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4161 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
4162 &data->arg.seq_args, &data->res.seq_res, 1);
4164 update_changeattr(dir, &data->res.dir_cinfo,
4165 data->res.fattr->time_start);
4166 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
4171 static void nfs4_free_createdata(struct nfs4_createdata *data)
4173 nfs4_label_free(data->label);
4177 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4178 struct page *page, unsigned int len, struct iattr *sattr,
4179 struct nfs4_label *label)
4181 struct nfs4_createdata *data;
4182 int status = -ENAMETOOLONG;
4184 if (len > NFS4_MAXPATHLEN)
4188 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4192 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4193 data->arg.u.symlink.pages = &page;
4194 data->arg.u.symlink.len = len;
4195 data->arg.label = label;
4197 status = nfs4_do_create(dir, dentry, data);
4199 nfs4_free_createdata(data);
4204 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
4205 struct page *page, unsigned int len, struct iattr *sattr)
4207 struct nfs4_exception exception = { };
4208 struct nfs4_label l, *label = NULL;
4211 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4214 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4215 trace_nfs4_symlink(dir, &dentry->d_name, err);
4216 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4218 } while (exception.retry);
4220 nfs4_label_release_security(label);
4224 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4225 struct iattr *sattr, struct nfs4_label *label)
4227 struct nfs4_createdata *data;
4228 int status = -ENOMEM;
4230 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4234 data->arg.label = label;
4235 status = nfs4_do_create(dir, dentry, data);
4237 nfs4_free_createdata(data);
4242 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4243 struct iattr *sattr)
4245 struct nfs_server *server = NFS_SERVER(dir);
4246 struct nfs4_exception exception = { };
4247 struct nfs4_label l, *label = NULL;
4250 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4252 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4253 sattr->ia_mode &= ~current_umask();
4255 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4256 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4257 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4259 } while (exception.retry);
4260 nfs4_label_release_security(label);
4265 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4266 u64 cookie, struct page **pages, unsigned int count, int plus)
4268 struct inode *dir = d_inode(dentry);
4269 struct nfs4_readdir_arg args = {
4274 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
4277 struct nfs4_readdir_res res;
4278 struct rpc_message msg = {
4279 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4286 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4288 (unsigned long long)cookie);
4289 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
4290 res.pgbase = args.pgbase;
4291 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
4293 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
4294 status += args.pgbase;
4297 nfs_invalidate_atime(dir);
4299 dprintk("%s: returns %d\n", __func__, status);
4303 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
4304 u64 cookie, struct page **pages, unsigned int count, int plus)
4306 struct nfs4_exception exception = { };
4309 err = _nfs4_proc_readdir(dentry, cred, cookie,
4310 pages, count, plus);
4311 trace_nfs4_readdir(d_inode(dentry), err);
4312 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
4314 } while (exception.retry);
4318 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4319 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
4321 struct nfs4_createdata *data;
4322 int mode = sattr->ia_mode;
4323 int status = -ENOMEM;
4325 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4330 data->arg.ftype = NF4FIFO;
4331 else if (S_ISBLK(mode)) {
4332 data->arg.ftype = NF4BLK;
4333 data->arg.u.device.specdata1 = MAJOR(rdev);
4334 data->arg.u.device.specdata2 = MINOR(rdev);
4336 else if (S_ISCHR(mode)) {
4337 data->arg.ftype = NF4CHR;
4338 data->arg.u.device.specdata1 = MAJOR(rdev);
4339 data->arg.u.device.specdata2 = MINOR(rdev);
4340 } else if (!S_ISSOCK(mode)) {
4345 data->arg.label = label;
4346 status = nfs4_do_create(dir, dentry, data);
4348 nfs4_free_createdata(data);
4353 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4354 struct iattr *sattr, dev_t rdev)
4356 struct nfs_server *server = NFS_SERVER(dir);
4357 struct nfs4_exception exception = { };
4358 struct nfs4_label l, *label = NULL;
4361 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4363 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4364 sattr->ia_mode &= ~current_umask();
4366 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4367 trace_nfs4_mknod(dir, &dentry->d_name, err);
4368 err = nfs4_handle_exception(NFS_SERVER(dir), err,
4370 } while (exception.retry);
4372 nfs4_label_release_security(label);
4377 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4378 struct nfs_fsstat *fsstat)
4380 struct nfs4_statfs_arg args = {
4382 .bitmask = server->attr_bitmask,
4384 struct nfs4_statfs_res res = {
4387 struct rpc_message msg = {
4388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4393 nfs_fattr_init(fsstat->fattr);
4394 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4397 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4399 struct nfs4_exception exception = { };
4402 err = nfs4_handle_exception(server,
4403 _nfs4_proc_statfs(server, fhandle, fsstat),
4405 } while (exception.retry);
4409 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4410 struct nfs_fsinfo *fsinfo)
4412 struct nfs4_fsinfo_arg args = {
4414 .bitmask = server->attr_bitmask,
4416 struct nfs4_fsinfo_res res = {
4419 struct rpc_message msg = {
4420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4425 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4428 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4430 struct nfs4_exception exception = { };
4431 unsigned long now = jiffies;
4435 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
4436 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
4438 nfs4_set_lease_period(server->nfs_client,
4439 fsinfo->lease_time * HZ,
4443 err = nfs4_handle_exception(server, err, &exception);
4444 } while (exception.retry);
4448 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4452 nfs_fattr_init(fsinfo->fattr);
4453 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
4455 /* block layout checks this! */
4456 server->pnfs_blksize = fsinfo->blksize;
4457 set_pnfs_layoutdriver(server, fhandle, fsinfo);
4463 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4464 struct nfs_pathconf *pathconf)
4466 struct nfs4_pathconf_arg args = {
4468 .bitmask = server->attr_bitmask,
4470 struct nfs4_pathconf_res res = {
4471 .pathconf = pathconf,
4473 struct rpc_message msg = {
4474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4479 /* None of the pathconf attributes are mandatory to implement */
4480 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4481 memset(pathconf, 0, sizeof(*pathconf));
4485 nfs_fattr_init(pathconf->fattr);
4486 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4489 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4490 struct nfs_pathconf *pathconf)
4492 struct nfs4_exception exception = { };
4496 err = nfs4_handle_exception(server,
4497 _nfs4_proc_pathconf(server, fhandle, pathconf),
4499 } while (exception.retry);
4503 int nfs4_set_rw_stateid(nfs4_stateid *stateid,
4504 const struct nfs_open_context *ctx,
4505 const struct nfs_lock_context *l_ctx,
4508 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
4510 EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4512 static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4513 const struct nfs_open_context *ctx,
4514 const struct nfs_lock_context *l_ctx,
4517 nfs4_stateid current_stateid;
4519 /* If the current stateid represents a lost lock, then exit */
4520 if (nfs4_set_rw_stateid(¤t_stateid, ctx, l_ctx, fmode) == -EIO)
4522 return nfs4_stateid_match(stateid, ¤t_stateid);
4525 static bool nfs4_error_stateid_expired(int err)
4528 case -NFS4ERR_DELEG_REVOKED:
4529 case -NFS4ERR_ADMIN_REVOKED:
4530 case -NFS4ERR_BAD_STATEID:
4531 case -NFS4ERR_STALE_STATEID:
4532 case -NFS4ERR_OLD_STATEID:
4533 case -NFS4ERR_OPENMODE:
4534 case -NFS4ERR_EXPIRED:
4540 static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
4542 struct nfs_server *server = NFS_SERVER(hdr->inode);
4544 trace_nfs4_read(hdr, task->tk_status);
4545 if (task->tk_status < 0) {
4546 struct nfs4_exception exception = {
4547 .inode = hdr->inode,
4548 .state = hdr->args.context->state,
4549 .stateid = &hdr->args.stateid,
4551 task->tk_status = nfs4_async_handle_exception(task,
4552 server, task->tk_status, &exception);
4553 if (exception.retry) {
4554 rpc_restart_call_prepare(task);
4559 if (task->tk_status > 0)
4560 renew_lease(server, hdr->timestamp);
4564 static bool nfs4_read_stateid_changed(struct rpc_task *task,
4565 struct nfs_pgio_args *args)
4568 if (!nfs4_error_stateid_expired(task->tk_status) ||
4569 nfs4_stateid_is_current(&args->stateid,
4574 rpc_restart_call_prepare(task);
4578 static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4581 dprintk("--> %s\n", __func__);
4583 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4585 if (nfs4_read_stateid_changed(task, &hdr->args))
4587 if (task->tk_status > 0)
4588 nfs_invalidate_atime(hdr->inode);
4589 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4590 nfs4_read_done_cb(task, hdr);
4593 static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4594 struct rpc_message *msg)
4596 hdr->timestamp = jiffies;
4597 if (!hdr->pgio_done_cb)
4598 hdr->pgio_done_cb = nfs4_read_done_cb;
4599 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
4600 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
4603 static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4604 struct nfs_pgio_header *hdr)
4606 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
4607 &hdr->args.seq_args,
4611 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4612 hdr->args.lock_context,
4613 hdr->rw_ops->rw_mode) == -EIO)
4615 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
4620 static int nfs4_write_done_cb(struct rpc_task *task,
4621 struct nfs_pgio_header *hdr)
4623 struct inode *inode = hdr->inode;
4625 trace_nfs4_write(hdr, task->tk_status);
4626 if (task->tk_status < 0) {
4627 struct nfs4_exception exception = {
4628 .inode = hdr->inode,
4629 .state = hdr->args.context->state,
4630 .stateid = &hdr->args.stateid,
4632 task->tk_status = nfs4_async_handle_exception(task,
4633 NFS_SERVER(inode), task->tk_status,
4635 if (exception.retry) {
4636 rpc_restart_call_prepare(task);
4640 if (task->tk_status >= 0) {
4641 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4642 nfs_writeback_update_inode(hdr);
4647 static bool nfs4_write_stateid_changed(struct rpc_task *task,
4648 struct nfs_pgio_args *args)
4651 if (!nfs4_error_stateid_expired(task->tk_status) ||
4652 nfs4_stateid_is_current(&args->stateid,
4657 rpc_restart_call_prepare(task);
4661 static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
4663 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
4665 if (nfs4_write_stateid_changed(task, &hdr->args))
4667 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4668 nfs4_write_done_cb(task, hdr);
4672 bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
4674 /* Don't request attributes for pNFS or O_DIRECT writes */
4675 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
4677 /* Otherwise, request attributes if and only if we don't hold
4680 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
4683 static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4684 struct rpc_message *msg)
4686 struct nfs_server *server = NFS_SERVER(hdr->inode);
4688 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4689 hdr->args.bitmask = NULL;
4690 hdr->res.fattr = NULL;
4692 hdr->args.bitmask = server->cache_consistency_bitmask;
4694 if (!hdr->pgio_done_cb)
4695 hdr->pgio_done_cb = nfs4_write_done_cb;
4696 hdr->res.server = server;
4697 hdr->timestamp = jiffies;
4699 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
4700 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
4703 static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
4705 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
4706 &data->args.seq_args,
4711 static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
4713 struct inode *inode = data->inode;
4715 trace_nfs4_commit(data, task->tk_status);
4716 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4717 NULL, NULL) == -EAGAIN) {
4718 rpc_restart_call_prepare(task);
4724 static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
4726 if (!nfs4_sequence_done(task, &data->res.seq_res))
4728 return data->commit_done_cb(task, data);
4731 static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
4733 struct nfs_server *server = NFS_SERVER(data->inode);
4735 if (data->commit_done_cb == NULL)
4736 data->commit_done_cb = nfs4_commit_done_cb;
4737 data->res.server = server;
4738 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
4739 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
4742 struct nfs4_renewdata {
4743 struct nfs_client *client;
4744 unsigned long timestamp;
4748 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4749 * standalone procedure for queueing an asynchronous RENEW.
4751 static void nfs4_renew_release(void *calldata)
4753 struct nfs4_renewdata *data = calldata;
4754 struct nfs_client *clp = data->client;
4756 if (atomic_read(&clp->cl_count) > 1)
4757 nfs4_schedule_state_renewal(clp);
4758 nfs_put_client(clp);
4762 static void nfs4_renew_done(struct rpc_task *task, void *calldata)
4764 struct nfs4_renewdata *data = calldata;
4765 struct nfs_client *clp = data->client;
4766 unsigned long timestamp = data->timestamp;
4768 trace_nfs4_renew_async(clp, task->tk_status);
4769 switch (task->tk_status) {
4772 case -NFS4ERR_LEASE_MOVED:
4773 nfs4_schedule_lease_moved_recovery(clp);
4776 /* Unless we're shutting down, schedule state recovery! */
4777 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4779 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
4780 nfs4_schedule_lease_recovery(clp);
4783 nfs4_schedule_path_down_recovery(clp);
4785 do_renew_lease(clp, timestamp);
4788 static const struct rpc_call_ops nfs4_renew_ops = {
4789 .rpc_call_done = nfs4_renew_done,
4790 .rpc_release = nfs4_renew_release,
4793 static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
4795 struct rpc_message msg = {
4796 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4800 struct nfs4_renewdata *data;
4802 if (renew_flags == 0)
4804 if (!atomic_inc_not_zero(&clp->cl_count))
4806 data = kmalloc(sizeof(*data), GFP_NOFS);
4810 data->timestamp = jiffies;
4811 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
4812 &nfs4_renew_ops, data);
4815 static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
4817 struct rpc_message msg = {
4818 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4822 unsigned long now = jiffies;
4825 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4828 do_renew_lease(clp, now);
4832 static inline int nfs4_server_supports_acls(struct nfs_server *server)
4834 return server->caps & NFS_CAP_ACLS;
4837 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4838 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
4841 #define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
4843 static int buf_to_pages_noslab(const void *buf, size_t buflen,
4844 struct page **pages)
4846 struct page *newpage, **spages;
4852 len = min_t(size_t, PAGE_SIZE, buflen);
4853 newpage = alloc_page(GFP_KERNEL);
4855 if (newpage == NULL)
4857 memcpy(page_address(newpage), buf, len);
4862 } while (buflen != 0);
4868 __free_page(spages[rc-1]);
4872 struct nfs4_cached_acl {
4878 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4880 struct nfs_inode *nfsi = NFS_I(inode);
4882 spin_lock(&inode->i_lock);
4883 kfree(nfsi->nfs4_acl);
4884 nfsi->nfs4_acl = acl;
4885 spin_unlock(&inode->i_lock);
4888 static void nfs4_zap_acl_attr(struct inode *inode)
4890 nfs4_set_cached_acl(inode, NULL);
4893 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4895 struct nfs_inode *nfsi = NFS_I(inode);
4896 struct nfs4_cached_acl *acl;
4899 spin_lock(&inode->i_lock);
4900 acl = nfsi->nfs4_acl;
4903 if (buf == NULL) /* user is just asking for length */
4905 if (acl->cached == 0)
4907 ret = -ERANGE; /* see getxattr(2) man page */
4908 if (acl->len > buflen)
4910 memcpy(buf, acl->data, acl->len);
4914 spin_unlock(&inode->i_lock);
4918 static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
4920 struct nfs4_cached_acl *acl;
4921 size_t buflen = sizeof(*acl) + acl_len;
4923 if (buflen <= PAGE_SIZE) {
4924 acl = kmalloc(buflen, GFP_KERNEL);
4928 _copy_from_pages(acl->data, pages, pgbase, acl_len);
4930 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4937 nfs4_set_cached_acl(inode, acl);
4941 * The getxattr API returns the required buffer length when called with a
4942 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4943 * the required buf. On a NULL buf, we send a page of data to the server
4944 * guessing that the ACL request can be serviced by a page. If so, we cache
4945 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4946 * the cache. If not so, we throw away the page, and cache the required
4947 * length. The next getxattr call will then produce another round trip to
4948 * the server, this time with the input buf of the required size.
4950 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4952 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
4953 struct nfs_getaclargs args = {
4954 .fh = NFS_FH(inode),
4958 struct nfs_getaclres res = {
4961 struct rpc_message msg = {
4962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4966 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
4967 int ret = -ENOMEM, i;
4969 if (npages > ARRAY_SIZE(pages))
4972 for (i = 0; i < npages; i++) {
4973 pages[i] = alloc_page(GFP_KERNEL);
4978 /* for decoding across pages */
4979 res.acl_scratch = alloc_page(GFP_KERNEL);
4980 if (!res.acl_scratch)
4983 args.acl_len = npages * PAGE_SIZE;
4985 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
4986 __func__, buf, buflen, npages, args.acl_len);
4987 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4988 &msg, &args.seq_args, &res.seq_res, 0);
4992 /* Handle the case where the passed-in buffer is too short */
4993 if (res.acl_flags & NFS4_ACL_TRUNC) {
4994 /* Did the user only issue a request for the acl length? */
5000 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
5002 if (res.acl_len > buflen) {
5006 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
5011 for (i = 0; i < npages; i++)
5013 __free_page(pages[i]);
5014 if (res.acl_scratch)
5015 __free_page(res.acl_scratch);
5019 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5021 struct nfs4_exception exception = { };
5024 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
5025 trace_nfs4_get_acl(inode, ret);
5028 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5029 } while (exception.retry);
5033 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5035 struct nfs_server *server = NFS_SERVER(inode);
5038 if (!nfs4_server_supports_acls(server))
5040 ret = nfs_revalidate_inode(server, inode);
5043 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5044 nfs_zap_acl_cache(inode);
5045 ret = nfs4_read_cached_acl(inode, buf, buflen);
5047 /* -ENOENT is returned if there is no ACL or if there is an ACL
5048 * but no cached acl data, just the acl length */
5050 return nfs4_get_acl_uncached(inode, buf, buflen);
5053 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5055 struct nfs_server *server = NFS_SERVER(inode);
5056 struct page *pages[NFS4ACL_MAXPAGES];
5057 struct nfs_setaclargs arg = {
5058 .fh = NFS_FH(inode),
5062 struct nfs_setaclres res;
5063 struct rpc_message msg = {
5064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5068 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5071 if (!nfs4_server_supports_acls(server))
5073 if (npages > ARRAY_SIZE(pages))
5075 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
5078 nfs4_inode_return_delegation(inode);
5079 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5082 * Free each page after tx, so the only ref left is
5083 * held by the network stack
5086 put_page(pages[i-1]);
5089 * Acl update can result in inode attribute update.
5090 * so mark the attribute cache invalid.
5092 spin_lock(&inode->i_lock);
5093 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5094 spin_unlock(&inode->i_lock);
5095 nfs_access_zap_cache(inode);
5096 nfs_zap_acl_cache(inode);
5100 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5102 struct nfs4_exception exception = { };
5105 err = __nfs4_proc_set_acl(inode, buf, buflen);
5106 trace_nfs4_set_acl(inode, err);
5107 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5109 } while (exception.retry);
5113 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
5114 static int _nfs4_get_security_label(struct inode *inode, void *buf,
5117 struct nfs_server *server = NFS_SERVER(inode);
5118 struct nfs_fattr fattr;
5119 struct nfs4_label label = {0, 0, buflen, buf};
5121 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5122 struct nfs4_getattr_arg arg = {
5123 .fh = NFS_FH(inode),
5126 struct nfs4_getattr_res res = {
5131 struct rpc_message msg = {
5132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
5138 nfs_fattr_init(&fattr);
5140 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
5143 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5145 if (buflen < label.len)
5150 static int nfs4_get_security_label(struct inode *inode, void *buf,
5153 struct nfs4_exception exception = { };
5156 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5160 err = _nfs4_get_security_label(inode, buf, buflen);
5161 trace_nfs4_get_security_label(inode, err);
5162 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5164 } while (exception.retry);
5168 static int _nfs4_do_set_security_label(struct inode *inode,
5169 struct nfs4_label *ilabel,
5170 struct nfs_fattr *fattr,
5171 struct nfs4_label *olabel)
5174 struct iattr sattr = {0};
5175 struct nfs_server *server = NFS_SERVER(inode);
5176 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
5177 struct nfs_setattrargs arg = {
5178 .fh = NFS_FH(inode),
5184 struct nfs_setattrres res = {
5189 struct rpc_message msg = {
5190 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5196 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
5198 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5200 dprintk("%s failed: %d\n", __func__, status);
5205 static int nfs4_do_set_security_label(struct inode *inode,
5206 struct nfs4_label *ilabel,
5207 struct nfs_fattr *fattr,
5208 struct nfs4_label *olabel)
5210 struct nfs4_exception exception = { };
5214 err = _nfs4_do_set_security_label(inode, ilabel,
5216 trace_nfs4_set_security_label(inode, err);
5217 err = nfs4_handle_exception(NFS_SERVER(inode), err,
5219 } while (exception.retry);
5224 nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
5226 struct nfs4_label ilabel, *olabel = NULL;
5227 struct nfs_fattr fattr;
5228 struct rpc_cred *cred;
5231 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5234 nfs_fattr_init(&fattr);
5238 ilabel.label = (char *)buf;
5239 ilabel.len = buflen;
5241 cred = rpc_lookup_cred();
5243 return PTR_ERR(cred);
5245 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5246 if (IS_ERR(olabel)) {
5247 status = -PTR_ERR(olabel);
5251 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5253 nfs_setsecurity(inode, &fattr, olabel);
5255 nfs4_label_free(olabel);
5260 #endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5263 static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5264 nfs4_verifier *bootverf)
5268 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5269 /* An impossible timestamp guarantees this value
5270 * will never match a generated boot time. */
5271 verf[0] = cpu_to_be32(U32_MAX);
5272 verf[1] = cpu_to_be32(U32_MAX);
5274 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
5275 u64 ns = ktime_to_ns(nn->boot_time);
5277 verf[0] = cpu_to_be32(ns >> 32);
5278 verf[1] = cpu_to_be32(ns);
5280 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5284 nfs4_init_nonuniform_client_string(struct nfs_client *clp)
5289 if (clp->cl_owner_id != NULL)
5293 len = 14 + strlen(clp->cl_ipaddr) + 1 +
5294 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5296 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5300 if (len > NFS4_OPAQUE_LIMIT + 1)
5304 * Since this string is allocated at mount time, and held until the
5305 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5306 * about a memory-reclaim deadlock.
5308 str = kmalloc(len, GFP_KERNEL);
5313 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5315 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5316 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
5319 clp->cl_owner_id = str;
5324 nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5329 len = 10 + 10 + 1 + 10 + 1 +
5330 strlen(nfs4_client_id_uniquifier) + 1 +
5331 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5333 if (len > NFS4_OPAQUE_LIMIT + 1)
5337 * Since this string is allocated at mount time, and held until the
5338 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5339 * about a memory-reclaim deadlock.
5341 str = kmalloc(len, GFP_KERNEL);
5345 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5346 clp->rpc_ops->version, clp->cl_minorversion,
5347 nfs4_client_id_uniquifier,
5348 clp->cl_rpcclient->cl_nodename);
5349 clp->cl_owner_id = str;
5354 nfs4_init_uniform_client_string(struct nfs_client *clp)
5359 if (clp->cl_owner_id != NULL)
5362 if (nfs4_client_id_uniquifier[0] != '\0')
5363 return nfs4_init_uniquifier_client_string(clp);
5365 len = 10 + 10 + 1 + 10 + 1 +
5366 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5368 if (len > NFS4_OPAQUE_LIMIT + 1)
5372 * Since this string is allocated at mount time, and held until the
5373 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5374 * about a memory-reclaim deadlock.
5376 str = kmalloc(len, GFP_KERNEL);
5380 scnprintf(str, len, "Linux NFSv%u.%u %s",
5381 clp->rpc_ops->version, clp->cl_minorversion,
5382 clp->cl_rpcclient->cl_nodename);
5383 clp->cl_owner_id = str;
5388 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5389 * services. Advertise one based on the address family of the
5393 nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5395 if (strchr(clp->cl_ipaddr, ':') != NULL)
5396 return scnprintf(buf, len, "tcp6");
5398 return scnprintf(buf, len, "tcp");
5401 static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5403 struct nfs4_setclientid *sc = calldata;
5405 if (task->tk_status == 0)
5406 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5409 static const struct rpc_call_ops nfs4_setclientid_ops = {
5410 .rpc_call_done = nfs4_setclientid_done,
5414 * nfs4_proc_setclientid - Negotiate client ID
5415 * @clp: state data structure
5416 * @program: RPC program for NFSv4 callback service
5417 * @port: IP port number for NFS4 callback service
5418 * @cred: RPC credential to use for this call
5419 * @res: where to place the result
5421 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5423 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5424 unsigned short port, struct rpc_cred *cred,
5425 struct nfs4_setclientid_res *res)
5427 nfs4_verifier sc_verifier;
5428 struct nfs4_setclientid setclientid = {
5429 .sc_verifier = &sc_verifier,
5433 struct rpc_message msg = {
5434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5435 .rpc_argp = &setclientid,
5439 struct rpc_task *task;
5440 struct rpc_task_setup task_setup_data = {
5441 .rpc_client = clp->cl_rpcclient,
5442 .rpc_message = &msg,
5443 .callback_ops = &nfs4_setclientid_ops,
5444 .callback_data = &setclientid,
5445 .flags = RPC_TASK_TIMEOUT,
5449 /* nfs_client_id4 */
5450 nfs4_init_boot_verifier(clp, &sc_verifier);
5452 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5453 status = nfs4_init_uniform_client_string(clp);
5455 status = nfs4_init_nonuniform_client_string(clp);
5461 setclientid.sc_netid_len =
5462 nfs4_init_callback_netid(clp,
5463 setclientid.sc_netid,
5464 sizeof(setclientid.sc_netid));
5465 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
5466 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
5467 clp->cl_ipaddr, port >> 8, port & 255);
5469 dprintk("NFS call setclientid auth=%s, '%s'\n",
5470 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5472 task = rpc_run_task(&task_setup_data);
5474 status = PTR_ERR(task);
5477 status = task->tk_status;
5478 if (setclientid.sc_cred) {
5479 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5480 put_rpccred(setclientid.sc_cred);
5484 trace_nfs4_setclientid(clp, status);
5485 dprintk("NFS reply setclientid: %d\n", status);
5490 * nfs4_proc_setclientid_confirm - Confirm client ID
5491 * @clp: state data structure
5492 * @res: result of a previous SETCLIENTID
5493 * @cred: RPC credential to use for this call
5495 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5497 int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
5498 struct nfs4_setclientid_res *arg,
5499 struct rpc_cred *cred)
5501 struct rpc_message msg = {
5502 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
5508 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5509 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5511 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5512 trace_nfs4_setclientid_confirm(clp, status);
5513 dprintk("NFS reply setclientid_confirm: %d\n", status);
5517 struct nfs4_delegreturndata {
5518 struct nfs4_delegreturnargs args;
5519 struct nfs4_delegreturnres res;
5521 nfs4_stateid stateid;
5522 unsigned long timestamp;
5524 struct nfs4_layoutreturn_args arg;
5525 struct nfs4_layoutreturn_res res;
5526 struct nfs4_xdr_opaque_data ld_private;
5530 struct nfs_fattr fattr;
5532 struct inode *inode;
5535 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5537 struct nfs4_delegreturndata *data = calldata;
5539 if (!nfs4_sequence_done(task, &data->res.seq_res))
5542 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
5544 /* Handle Layoutreturn errors */
5545 if (data->args.lr_args && task->tk_status != 0) {
5546 switch(data->res.lr_ret) {
5548 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5551 data->args.lr_args = NULL;
5552 data->res.lr_res = NULL;
5554 case -NFS4ERR_ADMIN_REVOKED:
5555 case -NFS4ERR_DELEG_REVOKED:
5556 case -NFS4ERR_EXPIRED:
5557 case -NFS4ERR_BAD_STATEID:
5558 case -NFS4ERR_OLD_STATEID:
5559 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5560 case -NFS4ERR_WRONG_CRED:
5561 data->args.lr_args = NULL;
5562 data->res.lr_res = NULL;
5563 data->res.lr_ret = 0;
5564 rpc_restart_call_prepare(task);
5569 switch (task->tk_status) {
5571 renew_lease(data->res.server, data->timestamp);
5573 case -NFS4ERR_ADMIN_REVOKED:
5574 case -NFS4ERR_DELEG_REVOKED:
5575 case -NFS4ERR_EXPIRED:
5576 nfs4_free_revoked_stateid(data->res.server,
5578 task->tk_msg.rpc_cred);
5579 case -NFS4ERR_BAD_STATEID:
5580 case -NFS4ERR_OLD_STATEID:
5581 case -NFS4ERR_STALE_STATEID:
5582 task->tk_status = 0;
5584 case -NFS4ERR_ACCESS:
5585 if (data->args.bitmask) {
5586 data->args.bitmask = NULL;
5587 data->res.fattr = NULL;
5588 task->tk_status = 0;
5589 rpc_restart_call_prepare(task);
5593 if (nfs4_async_handle_error(task, data->res.server,
5594 NULL, NULL) == -EAGAIN) {
5595 rpc_restart_call_prepare(task);
5599 data->rpc_status = task->tk_status;
5602 static void nfs4_delegreturn_release(void *calldata)
5604 struct nfs4_delegreturndata *data = calldata;
5605 struct inode *inode = data->inode;
5609 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5611 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5612 nfs_iput_and_deactive(inode);
5617 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5619 struct nfs4_delegreturndata *d_data;
5621 d_data = (struct nfs4_delegreturndata *)data;
5623 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
5626 nfs4_setup_sequence(d_data->res.server->nfs_client,
5627 &d_data->args.seq_args,
5628 &d_data->res.seq_res,
5632 static const struct rpc_call_ops nfs4_delegreturn_ops = {
5633 .rpc_call_prepare = nfs4_delegreturn_prepare,
5634 .rpc_call_done = nfs4_delegreturn_done,
5635 .rpc_release = nfs4_delegreturn_release,
5638 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5640 struct nfs4_delegreturndata *data;
5641 struct nfs_server *server = NFS_SERVER(inode);
5642 struct rpc_task *task;
5643 struct rpc_message msg = {
5644 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5647 struct rpc_task_setup task_setup_data = {
5648 .rpc_client = server->client,
5649 .rpc_message = &msg,
5650 .callback_ops = &nfs4_delegreturn_ops,
5651 .flags = RPC_TASK_ASYNC,
5655 data = kzalloc(sizeof(*data), GFP_NOFS);
5658 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
5660 nfs4_state_protect(server->nfs_client,
5661 NFS_SP4_MACH_CRED_CLEANUP,
5662 &task_setup_data.rpc_client, &msg);
5664 data->args.fhandle = &data->fh;
5665 data->args.stateid = &data->stateid;
5666 data->args.bitmask = server->cache_consistency_bitmask;
5667 nfs_copy_fh(&data->fh, NFS_FH(inode));
5668 nfs4_stateid_copy(&data->stateid, stateid);
5669 data->res.fattr = &data->fattr;
5670 data->res.server = server;
5671 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5672 data->lr.arg.ld_private = &data->lr.ld_private;
5673 nfs_fattr_init(data->res.fattr);
5674 data->timestamp = jiffies;
5675 data->rpc_status = 0;
5676 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
5677 data->inode = nfs_igrab_and_active(inode);
5680 data->args.lr_args = &data->lr.arg;
5681 data->res.lr_res = &data->lr.res;
5683 } else if (data->lr.roc) {
5684 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5685 data->lr.roc = false;
5688 task_setup_data.callback_data = data;
5689 msg.rpc_argp = &data->args;
5690 msg.rpc_resp = &data->res;
5691 task = rpc_run_task(&task_setup_data);
5693 return PTR_ERR(task);
5696 status = rpc_wait_for_completion_task(task);
5699 status = data->rpc_status;
5705 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
5707 struct nfs_server *server = NFS_SERVER(inode);
5708 struct nfs4_exception exception = { };
5711 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
5712 trace_nfs4_delegreturn(inode, stateid, err);
5714 case -NFS4ERR_STALE_STATEID:
5715 case -NFS4ERR_EXPIRED:
5719 err = nfs4_handle_exception(server, err, &exception);
5720 } while (exception.retry);
5724 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5726 struct inode *inode = state->inode;
5727 struct nfs_server *server = NFS_SERVER(inode);
5728 struct nfs_client *clp = server->nfs_client;
5729 struct nfs_lockt_args arg = {
5730 .fh = NFS_FH(inode),
5733 struct nfs_lockt_res res = {
5736 struct rpc_message msg = {
5737 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5740 .rpc_cred = state->owner->so_cred,
5742 struct nfs4_lock_state *lsp;
5745 arg.lock_owner.clientid = clp->cl_clientid;
5746 status = nfs4_set_lock_state(state, request);
5749 lsp = request->fl_u.nfs4_fl.owner;
5750 arg.lock_owner.id = lsp->ls_seqid.owner_id;
5751 arg.lock_owner.s_dev = server->s_dev;
5752 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
5755 request->fl_type = F_UNLCK;
5757 case -NFS4ERR_DENIED:
5760 request->fl_ops->fl_release_private(request);
5761 request->fl_ops = NULL;
5766 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5768 struct nfs4_exception exception = { };
5772 err = _nfs4_proc_getlk(state, cmd, request);
5773 trace_nfs4_get_lock(request, state, cmd, err);
5774 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
5776 } while (exception.retry);
5780 struct nfs4_unlockdata {
5781 struct nfs_locku_args arg;
5782 struct nfs_locku_res res;
5783 struct nfs4_lock_state *lsp;
5784 struct nfs_open_context *ctx;
5785 struct file_lock fl;
5786 struct nfs_server *server;
5787 unsigned long timestamp;
5790 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5791 struct nfs_open_context *ctx,
5792 struct nfs4_lock_state *lsp,
5793 struct nfs_seqid *seqid)
5795 struct nfs4_unlockdata *p;
5796 struct inode *inode = lsp->ls_state->inode;
5798 p = kzalloc(sizeof(*p), GFP_NOFS);
5801 p->arg.fh = NFS_FH(inode);
5803 p->arg.seqid = seqid;
5804 p->res.seqid = seqid;
5806 atomic_inc(&lsp->ls_count);
5807 /* Ensure we don't close file until we're done freeing locks! */
5808 p->ctx = get_nfs_open_context(ctx);
5809 memcpy(&p->fl, fl, sizeof(p->fl));
5810 p->server = NFS_SERVER(inode);
5814 static void nfs4_locku_release_calldata(void *data)
5816 struct nfs4_unlockdata *calldata = data;
5817 nfs_free_seqid(calldata->arg.seqid);
5818 nfs4_put_lock_state(calldata->lsp);
5819 put_nfs_open_context(calldata->ctx);
5823 static void nfs4_locku_done(struct rpc_task *task, void *data)
5825 struct nfs4_unlockdata *calldata = data;
5827 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5829 switch (task->tk_status) {
5831 renew_lease(calldata->server, calldata->timestamp);
5832 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
5833 if (nfs4_update_lock_stateid(calldata->lsp,
5834 &calldata->res.stateid))
5836 case -NFS4ERR_ADMIN_REVOKED:
5837 case -NFS4ERR_EXPIRED:
5838 nfs4_free_revoked_stateid(calldata->server,
5839 &calldata->arg.stateid,
5840 task->tk_msg.rpc_cred);
5841 case -NFS4ERR_BAD_STATEID:
5842 case -NFS4ERR_OLD_STATEID:
5843 case -NFS4ERR_STALE_STATEID:
5844 if (!nfs4_stateid_match(&calldata->arg.stateid,
5845 &calldata->lsp->ls_stateid))
5846 rpc_restart_call_prepare(task);
5849 if (nfs4_async_handle_error(task, calldata->server,
5850 NULL, NULL) == -EAGAIN)
5851 rpc_restart_call_prepare(task);
5853 nfs_release_seqid(calldata->arg.seqid);
5856 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
5858 struct nfs4_unlockdata *calldata = data;
5860 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
5862 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
5863 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
5864 /* Note: exit _without_ running nfs4_locku_done */
5867 calldata->timestamp = jiffies;
5868 if (nfs4_setup_sequence(calldata->server->nfs_client,
5869 &calldata->arg.seq_args,
5870 &calldata->res.seq_res,
5872 nfs_release_seqid(calldata->arg.seqid);
5875 task->tk_action = NULL;
5877 nfs4_sequence_done(task, &calldata->res.seq_res);
5880 static const struct rpc_call_ops nfs4_locku_ops = {
5881 .rpc_call_prepare = nfs4_locku_prepare,
5882 .rpc_call_done = nfs4_locku_done,
5883 .rpc_release = nfs4_locku_release_calldata,
5886 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5887 struct nfs_open_context *ctx,
5888 struct nfs4_lock_state *lsp,
5889 struct nfs_seqid *seqid)
5891 struct nfs4_unlockdata *data;
5892 struct rpc_message msg = {
5893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5894 .rpc_cred = ctx->cred,
5896 struct rpc_task_setup task_setup_data = {
5897 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5898 .rpc_message = &msg,
5899 .callback_ops = &nfs4_locku_ops,
5900 .workqueue = nfsiod_workqueue,
5901 .flags = RPC_TASK_ASYNC,
5904 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5905 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5907 /* Ensure this is an unlock - when canceling a lock, the
5908 * canceled lock is passed in, and it won't be an unlock.
5910 fl->fl_type = F_UNLCK;
5912 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5914 nfs_free_seqid(seqid);
5915 return ERR_PTR(-ENOMEM);
5918 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
5919 msg.rpc_argp = &data->arg;
5920 msg.rpc_resp = &data->res;
5921 task_setup_data.callback_data = data;
5922 return rpc_run_task(&task_setup_data);
5925 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5927 struct inode *inode = state->inode;
5928 struct nfs4_state_owner *sp = state->owner;
5929 struct nfs_inode *nfsi = NFS_I(inode);
5930 struct nfs_seqid *seqid;
5931 struct nfs4_lock_state *lsp;
5932 struct rpc_task *task;
5933 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5935 unsigned char fl_flags = request->fl_flags;
5937 status = nfs4_set_lock_state(state, request);
5938 /* Unlock _before_ we do the RPC call */
5939 request->fl_flags |= FL_EXISTS;
5940 /* Exclude nfs_delegation_claim_locks() */
5941 mutex_lock(&sp->so_delegreturn_mutex);
5942 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
5943 down_read(&nfsi->rwsem);
5944 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
5945 up_read(&nfsi->rwsem);
5946 mutex_unlock(&sp->so_delegreturn_mutex);
5949 up_read(&nfsi->rwsem);
5950 mutex_unlock(&sp->so_delegreturn_mutex);
5953 /* Is this a delegated lock? */
5954 lsp = request->fl_u.nfs4_fl.owner;
5955 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5957 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5958 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
5962 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
5963 status = PTR_ERR(task);
5966 status = rpc_wait_for_completion_task(task);
5969 request->fl_flags = fl_flags;
5970 trace_nfs4_unlock(request, state, F_SETLK, status);
5974 struct nfs4_lockdata {
5975 struct nfs_lock_args arg;
5976 struct nfs_lock_res res;
5977 struct nfs4_lock_state *lsp;
5978 struct nfs_open_context *ctx;
5979 struct file_lock fl;
5980 unsigned long timestamp;
5983 struct nfs_server *server;
5986 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
5987 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5990 struct nfs4_lockdata *p;
5991 struct inode *inode = lsp->ls_state->inode;
5992 struct nfs_server *server = NFS_SERVER(inode);
5993 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
5995 p = kzalloc(sizeof(*p), gfp_mask);
5999 p->arg.fh = NFS_FH(inode);
6001 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
6002 if (IS_ERR(p->arg.open_seqid))
6004 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6005 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
6006 if (IS_ERR(p->arg.lock_seqid))
6007 goto out_free_seqid;
6008 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
6009 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
6010 p->arg.lock_owner.s_dev = server->s_dev;
6011 p->res.lock_seqid = p->arg.lock_seqid;
6014 atomic_inc(&lsp->ls_count);
6015 p->ctx = get_nfs_open_context(ctx);
6016 memcpy(&p->fl, fl, sizeof(p->fl));
6019 nfs_free_seqid(p->arg.open_seqid);
6025 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6027 struct nfs4_lockdata *data = calldata;
6028 struct nfs4_state *state = data->lsp->ls_state;
6030 dprintk("%s: begin!\n", __func__);
6031 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
6033 /* Do we need to do an open_to_lock_owner? */
6034 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
6035 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
6036 goto out_release_lock_seqid;
6038 nfs4_stateid_copy(&data->arg.open_stateid,
6039 &state->open_stateid);
6040 data->arg.new_lock_owner = 1;
6041 data->res.open_seqid = data->arg.open_seqid;
6043 data->arg.new_lock_owner = 0;
6044 nfs4_stateid_copy(&data->arg.lock_stateid,
6045 &data->lsp->ls_stateid);
6047 if (!nfs4_valid_open_stateid(state)) {
6048 data->rpc_status = -EBADF;
6049 task->tk_action = NULL;
6050 goto out_release_open_seqid;
6052 data->timestamp = jiffies;
6053 if (nfs4_setup_sequence(data->server->nfs_client,
6054 &data->arg.seq_args,
6058 out_release_open_seqid:
6059 nfs_release_seqid(data->arg.open_seqid);
6060 out_release_lock_seqid:
6061 nfs_release_seqid(data->arg.lock_seqid);
6063 nfs4_sequence_done(task, &data->res.seq_res);
6064 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
6067 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6069 struct nfs4_lockdata *data = calldata;
6070 struct nfs4_lock_state *lsp = data->lsp;
6072 dprintk("%s: begin!\n", __func__);
6074 if (!nfs4_sequence_done(task, &data->res.seq_res))
6077 data->rpc_status = task->tk_status;
6078 switch (task->tk_status) {
6080 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
6082 if (data->arg.new_lock) {
6083 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
6084 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
6085 rpc_restart_call_prepare(task);
6089 if (data->arg.new_lock_owner != 0) {
6090 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6091 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6092 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6093 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6094 rpc_restart_call_prepare(task);
6096 case -NFS4ERR_BAD_STATEID:
6097 case -NFS4ERR_OLD_STATEID:
6098 case -NFS4ERR_STALE_STATEID:
6099 case -NFS4ERR_EXPIRED:
6100 if (data->arg.new_lock_owner != 0) {
6101 if (!nfs4_stateid_match(&data->arg.open_stateid,
6102 &lsp->ls_state->open_stateid))
6103 rpc_restart_call_prepare(task);
6104 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6106 rpc_restart_call_prepare(task);
6108 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
6111 static void nfs4_lock_release(void *calldata)
6113 struct nfs4_lockdata *data = calldata;
6115 dprintk("%s: begin!\n", __func__);
6116 nfs_free_seqid(data->arg.open_seqid);
6117 if (data->cancelled != 0) {
6118 struct rpc_task *task;
6119 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6120 data->arg.lock_seqid);
6122 rpc_put_task_async(task);
6123 dprintk("%s: cancelling lock!\n", __func__);
6125 nfs_free_seqid(data->arg.lock_seqid);
6126 nfs4_put_lock_state(data->lsp);
6127 put_nfs_open_context(data->ctx);
6129 dprintk("%s: done!\n", __func__);
6132 static const struct rpc_call_ops nfs4_lock_ops = {
6133 .rpc_call_prepare = nfs4_lock_prepare,
6134 .rpc_call_done = nfs4_lock_done,
6135 .rpc_release = nfs4_lock_release,
6138 static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6141 case -NFS4ERR_ADMIN_REVOKED:
6142 case -NFS4ERR_EXPIRED:
6143 case -NFS4ERR_BAD_STATEID:
6144 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6145 if (new_lock_owner != 0 ||
6146 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
6147 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
6149 case -NFS4ERR_STALE_STATEID:
6150 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
6151 nfs4_schedule_lease_recovery(server->nfs_client);
6155 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
6157 struct nfs4_lockdata *data;
6158 struct rpc_task *task;
6159 struct rpc_message msg = {
6160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6161 .rpc_cred = state->owner->so_cred,
6163 struct rpc_task_setup task_setup_data = {
6164 .rpc_client = NFS_CLIENT(state->inode),
6165 .rpc_message = &msg,
6166 .callback_ops = &nfs4_lock_ops,
6167 .workqueue = nfsiod_workqueue,
6168 .flags = RPC_TASK_ASYNC,
6172 dprintk("%s: begin!\n", __func__);
6173 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
6174 fl->fl_u.nfs4_fl.owner,
6175 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
6179 data->arg.block = 1;
6180 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
6181 msg.rpc_argp = &data->arg;
6182 msg.rpc_resp = &data->res;
6183 task_setup_data.callback_data = data;
6184 if (recovery_type > NFS_LOCK_NEW) {
6185 if (recovery_type == NFS_LOCK_RECLAIM)
6186 data->arg.reclaim = NFS_LOCK_RECLAIM;
6187 nfs4_set_sequence_privileged(&data->arg.seq_args);
6189 data->arg.new_lock = 1;
6190 task = rpc_run_task(&task_setup_data);
6192 return PTR_ERR(task);
6193 ret = rpc_wait_for_completion_task(task);
6195 ret = data->rpc_status;
6197 nfs4_handle_setlk_error(data->server, data->lsp,
6198 data->arg.new_lock_owner, ret);
6200 data->cancelled = 1;
6202 dprintk("%s: done, ret = %d!\n", __func__, ret);
6203 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
6207 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6209 struct nfs_server *server = NFS_SERVER(state->inode);
6210 struct nfs4_exception exception = {
6211 .inode = state->inode,
6216 /* Cache the lock if possible... */
6217 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6219 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
6220 if (err != -NFS4ERR_DELAY)
6222 nfs4_handle_exception(server, err, &exception);
6223 } while (exception.retry);
6227 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6229 struct nfs_server *server = NFS_SERVER(state->inode);
6230 struct nfs4_exception exception = {
6231 .inode = state->inode,
6235 err = nfs4_set_lock_state(state, request);
6238 if (!recover_lost_locks) {
6239 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6243 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6245 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
6249 case -NFS4ERR_GRACE:
6250 case -NFS4ERR_DELAY:
6251 nfs4_handle_exception(server, err, &exception);
6254 } while (exception.retry);
6259 #if defined(CONFIG_NFS_V4_1)
6260 static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6262 struct nfs4_lock_state *lsp;
6265 status = nfs4_set_lock_state(state, request);
6268 lsp = request->fl_u.nfs4_fl.owner;
6269 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6270 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6272 return nfs4_lock_expired(state, request);
6276 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6278 struct nfs_inode *nfsi = NFS_I(state->inode);
6279 struct nfs4_state_owner *sp = state->owner;
6280 unsigned char fl_flags = request->fl_flags;
6283 request->fl_flags |= FL_ACCESS;
6284 status = locks_lock_inode_wait(state->inode, request);
6287 mutex_lock(&sp->so_delegreturn_mutex);
6288 down_read(&nfsi->rwsem);
6289 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
6290 /* Yes: cache locks! */
6291 /* ...but avoid races with delegation recall... */
6292 request->fl_flags = fl_flags & ~FL_SLEEP;
6293 status = locks_lock_inode_wait(state->inode, request);
6294 up_read(&nfsi->rwsem);
6295 mutex_unlock(&sp->so_delegreturn_mutex);
6298 up_read(&nfsi->rwsem);
6299 mutex_unlock(&sp->so_delegreturn_mutex);
6300 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6302 request->fl_flags = fl_flags;
6306 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6308 struct nfs4_exception exception = {
6310 .inode = state->inode,
6315 err = _nfs4_proc_setlk(state, cmd, request);
6316 if (err == -NFS4ERR_DENIED)
6318 err = nfs4_handle_exception(NFS_SERVER(state->inode),
6320 } while (exception.retry);
6324 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6325 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6328 nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6329 struct file_lock *request)
6331 int status = -ERESTARTSYS;
6332 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6334 while(!signalled()) {
6335 status = nfs4_proc_setlk(state, cmd, request);
6336 if ((status != -EAGAIN) || IS_SETLK(cmd))
6338 freezable_schedule_timeout_interruptible(timeout);
6340 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6341 status = -ERESTARTSYS;
6346 #ifdef CONFIG_NFS_V4_1
6347 struct nfs4_lock_waiter {
6348 struct task_struct *task;
6349 struct inode *inode;
6350 struct nfs_lowner *owner;
6355 nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6358 struct cb_notify_lock_args *cbnl = key;
6359 struct nfs4_lock_waiter *waiter = wait->private;
6360 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6361 *wowner = waiter->owner;
6363 /* Only wake if the callback was for the same owner */
6364 if (lowner->clientid != wowner->clientid ||
6365 lowner->id != wowner->id ||
6366 lowner->s_dev != wowner->s_dev)
6369 /* Make sure it's for the right inode */
6370 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6373 waiter->notified = true;
6375 /* override "private" so we can use default_wake_function */
6376 wait->private = waiter->task;
6377 ret = autoremove_wake_function(wait, mode, flags, key);
6378 wait->private = waiter;
6383 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6385 int status = -ERESTARTSYS;
6386 unsigned long flags;
6387 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6388 struct nfs_server *server = NFS_SERVER(state->inode);
6389 struct nfs_client *clp = server->nfs_client;
6390 wait_queue_head_t *q = &clp->cl_lock_waitq;
6391 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6392 .id = lsp->ls_seqid.owner_id,
6393 .s_dev = server->s_dev };
6394 struct nfs4_lock_waiter waiter = { .task = current,
6395 .inode = state->inode,
6397 .notified = false };
6400 /* Don't bother with waitqueue if we don't expect a callback */
6401 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6402 return nfs4_retry_setlk_simple(state, cmd, request);
6405 wait.private = &waiter;
6406 wait.func = nfs4_wake_lock_waiter;
6407 add_wait_queue(q, &wait);
6409 while(!signalled()) {
6410 status = nfs4_proc_setlk(state, cmd, request);
6411 if ((status != -EAGAIN) || IS_SETLK(cmd))
6414 status = -ERESTARTSYS;
6415 spin_lock_irqsave(&q->lock, flags);
6416 if (waiter.notified) {
6417 spin_unlock_irqrestore(&q->lock, flags);
6420 set_current_state(TASK_INTERRUPTIBLE);
6421 spin_unlock_irqrestore(&q->lock, flags);
6423 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6426 finish_wait(q, &wait);
6429 #else /* !CONFIG_NFS_V4_1 */
6431 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6433 return nfs4_retry_setlk_simple(state, cmd, request);
6438 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6440 struct nfs_open_context *ctx;
6441 struct nfs4_state *state;
6444 /* verify open state */
6445 ctx = nfs_file_open_context(filp);
6448 if (request->fl_start < 0 || request->fl_end < 0)
6451 if (IS_GETLK(cmd)) {
6453 return nfs4_proc_getlk(state, F_GETLK, request);
6457 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6460 if (request->fl_type == F_UNLCK) {
6462 return nfs4_proc_unlck(state, cmd, request);
6469 if ((request->fl_flags & FL_POSIX) &&
6470 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6474 * Don't rely on the VFS having checked the file open mode,
6475 * since it won't do this for flock() locks.
6477 switch (request->fl_type) {
6479 if (!(filp->f_mode & FMODE_READ))
6483 if (!(filp->f_mode & FMODE_WRITE))
6487 status = nfs4_set_lock_state(state, request);
6491 return nfs4_retry_setlk(state, cmd, request);
6494 int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
6496 struct nfs_server *server = NFS_SERVER(state->inode);
6499 err = nfs4_set_lock_state(state, fl);
6502 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
6503 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
6506 struct nfs_release_lockowner_data {
6507 struct nfs4_lock_state *lsp;
6508 struct nfs_server *server;
6509 struct nfs_release_lockowner_args args;
6510 struct nfs_release_lockowner_res res;
6511 unsigned long timestamp;
6514 static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6516 struct nfs_release_lockowner_data *data = calldata;
6517 struct nfs_server *server = data->server;
6518 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6519 &data->res.seq_res, task);
6520 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6521 data->timestamp = jiffies;
6524 static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6526 struct nfs_release_lockowner_data *data = calldata;
6527 struct nfs_server *server = data->server;
6529 nfs40_sequence_done(task, &data->res.seq_res);
6531 switch (task->tk_status) {
6533 renew_lease(server, data->timestamp);
6535 case -NFS4ERR_STALE_CLIENTID:
6536 case -NFS4ERR_EXPIRED:
6537 nfs4_schedule_lease_recovery(server->nfs_client);
6539 case -NFS4ERR_LEASE_MOVED:
6540 case -NFS4ERR_DELAY:
6541 if (nfs4_async_handle_error(task, server,
6542 NULL, NULL) == -EAGAIN)
6543 rpc_restart_call_prepare(task);
6547 static void nfs4_release_lockowner_release(void *calldata)
6549 struct nfs_release_lockowner_data *data = calldata;
6550 nfs4_free_lock_state(data->server, data->lsp);
6554 static const struct rpc_call_ops nfs4_release_lockowner_ops = {
6555 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6556 .rpc_call_done = nfs4_release_lockowner_done,
6557 .rpc_release = nfs4_release_lockowner_release,
6561 nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
6563 struct nfs_release_lockowner_data *data;
6564 struct rpc_message msg = {
6565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6568 if (server->nfs_client->cl_mvops->minor_version != 0)
6571 data = kmalloc(sizeof(*data), GFP_NOFS);
6575 data->server = server;
6576 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6577 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6578 data->args.lock_owner.s_dev = server->s_dev;
6580 msg.rpc_argp = &data->args;
6581 msg.rpc_resp = &data->res;
6582 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6583 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
6586 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6588 static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6589 struct dentry *unused, struct inode *inode,
6590 const char *key, const void *buf,
6591 size_t buflen, int flags)
6593 return nfs4_proc_set_acl(inode, buf, buflen);
6596 static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6597 struct dentry *unused, struct inode *inode,
6598 const char *key, void *buf, size_t buflen)
6600 return nfs4_proc_get_acl(inode, buf, buflen);
6603 static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6605 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6608 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
6610 static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6611 struct dentry *unused, struct inode *inode,
6612 const char *key, const void *buf,
6613 size_t buflen, int flags)
6615 if (security_ismaclabel(key))
6616 return nfs4_set_security_label(inode, buf, buflen);
6621 static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6622 struct dentry *unused, struct inode *inode,
6623 const char *key, void *buf, size_t buflen)
6625 if (security_ismaclabel(key))
6626 return nfs4_get_security_label(inode, buf, buflen);
6631 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6635 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6636 len = security_inode_listsecurity(inode, list, list_len);
6637 if (list_len && len > list_len)
6643 static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6644 .prefix = XATTR_SECURITY_PREFIX,
6645 .get = nfs4_xattr_get_nfs4_label,
6646 .set = nfs4_xattr_set_nfs4_label,
6652 nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6660 * nfs_fhget will use either the mounted_on_fileid or the fileid
6662 static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6664 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6665 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6666 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
6667 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
6670 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
6671 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
6672 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6676 static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6677 const struct qstr *name,
6678 struct nfs4_fs_locations *fs_locations,
6681 struct nfs_server *server = NFS_SERVER(dir);
6683 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6685 struct nfs4_fs_locations_arg args = {
6686 .dir_fh = NFS_FH(dir),
6691 struct nfs4_fs_locations_res res = {
6692 .fs_locations = fs_locations,
6694 struct rpc_message msg = {
6695 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6701 dprintk("%s: start\n", __func__);
6703 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6704 * is not supported */
6705 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6706 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6708 bitmask[0] |= FATTR4_WORD0_FILEID;
6710 nfs_fattr_init(&fs_locations->fattr);
6711 fs_locations->server = server;
6712 fs_locations->nlocations = 0;
6713 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
6714 dprintk("%s: returned status = %d\n", __func__, status);
6718 int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6719 const struct qstr *name,
6720 struct nfs4_fs_locations *fs_locations,
6723 struct nfs4_exception exception = { };
6726 err = _nfs4_proc_fs_locations(client, dir, name,
6727 fs_locations, page);
6728 trace_nfs4_get_fs_locations(dir, name, err);
6729 err = nfs4_handle_exception(NFS_SERVER(dir), err,
6731 } while (exception.retry);
6736 * This operation also signals the server that this client is
6737 * performing migration recovery. The server can stop returning
6738 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6739 * appended to this compound to identify the client ID which is
6740 * performing recovery.
6742 static int _nfs40_proc_get_locations(struct inode *inode,
6743 struct nfs4_fs_locations *locations,
6744 struct page *page, struct rpc_cred *cred)
6746 struct nfs_server *server = NFS_SERVER(inode);
6747 struct rpc_clnt *clnt = server->client;
6749 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6751 struct nfs4_fs_locations_arg args = {
6752 .clientid = server->nfs_client->cl_clientid,
6753 .fh = NFS_FH(inode),
6756 .migration = 1, /* skip LOOKUP */
6757 .renew = 1, /* append RENEW */
6759 struct nfs4_fs_locations_res res = {
6760 .fs_locations = locations,
6764 struct rpc_message msg = {
6765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6770 unsigned long now = jiffies;
6773 nfs_fattr_init(&locations->fattr);
6774 locations->server = server;
6775 locations->nlocations = 0;
6777 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6778 nfs4_set_sequence_privileged(&args.seq_args);
6779 status = nfs4_call_sync_sequence(clnt, server, &msg,
6780 &args.seq_args, &res.seq_res);
6784 renew_lease(server, now);
6788 #ifdef CONFIG_NFS_V4_1
6791 * This operation also signals the server that this client is
6792 * performing migration recovery. The server can stop asserting
6793 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6794 * performing this operation is identified in the SEQUENCE
6795 * operation in this compound.
6797 * When the client supports GETATTR(fs_locations_info), it can
6798 * be plumbed in here.
6800 static int _nfs41_proc_get_locations(struct inode *inode,
6801 struct nfs4_fs_locations *locations,
6802 struct page *page, struct rpc_cred *cred)
6804 struct nfs_server *server = NFS_SERVER(inode);
6805 struct rpc_clnt *clnt = server->client;
6807 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6809 struct nfs4_fs_locations_arg args = {
6810 .fh = NFS_FH(inode),
6813 .migration = 1, /* skip LOOKUP */
6815 struct nfs4_fs_locations_res res = {
6816 .fs_locations = locations,
6819 struct rpc_message msg = {
6820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6827 nfs_fattr_init(&locations->fattr);
6828 locations->server = server;
6829 locations->nlocations = 0;
6831 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6832 nfs4_set_sequence_privileged(&args.seq_args);
6833 status = nfs4_call_sync_sequence(clnt, server, &msg,
6834 &args.seq_args, &res.seq_res);
6835 if (status == NFS4_OK &&
6836 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6837 status = -NFS4ERR_LEASE_MOVED;
6841 #endif /* CONFIG_NFS_V4_1 */
6844 * nfs4_proc_get_locations - discover locations for a migrated FSID
6845 * @inode: inode on FSID that is migrating
6846 * @locations: result of query
6848 * @cred: credential to use for this operation
6850 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6851 * operation failed, or a negative errno if a local error occurred.
6853 * On success, "locations" is filled in, but if the server has
6854 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6857 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6858 * from this client that require migration recovery.
6860 int nfs4_proc_get_locations(struct inode *inode,
6861 struct nfs4_fs_locations *locations,
6862 struct page *page, struct rpc_cred *cred)
6864 struct nfs_server *server = NFS_SERVER(inode);
6865 struct nfs_client *clp = server->nfs_client;
6866 const struct nfs4_mig_recovery_ops *ops =
6867 clp->cl_mvops->mig_recovery_ops;
6868 struct nfs4_exception exception = { };
6871 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6872 (unsigned long long)server->fsid.major,
6873 (unsigned long long)server->fsid.minor,
6875 nfs_display_fhandle(NFS_FH(inode), __func__);
6878 status = ops->get_locations(inode, locations, page, cred);
6879 if (status != -NFS4ERR_DELAY)
6881 nfs4_handle_exception(server, status, &exception);
6882 } while (exception.retry);
6887 * This operation also signals the server that this client is
6888 * performing "lease moved" recovery. The server can stop
6889 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6890 * is appended to this compound to identify the client ID which is
6891 * performing recovery.
6893 static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6895 struct nfs_server *server = NFS_SERVER(inode);
6896 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6897 struct rpc_clnt *clnt = server->client;
6898 struct nfs4_fsid_present_arg args = {
6899 .fh = NFS_FH(inode),
6900 .clientid = clp->cl_clientid,
6901 .renew = 1, /* append RENEW */
6903 struct nfs4_fsid_present_res res = {
6906 struct rpc_message msg = {
6907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6912 unsigned long now = jiffies;
6915 res.fh = nfs_alloc_fhandle();
6919 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6920 nfs4_set_sequence_privileged(&args.seq_args);
6921 status = nfs4_call_sync_sequence(clnt, server, &msg,
6922 &args.seq_args, &res.seq_res);
6923 nfs_free_fhandle(res.fh);
6927 do_renew_lease(clp, now);
6931 #ifdef CONFIG_NFS_V4_1
6934 * This operation also signals the server that this client is
6935 * performing "lease moved" recovery. The server can stop asserting
6936 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6937 * this operation is identified in the SEQUENCE operation in this
6940 static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6942 struct nfs_server *server = NFS_SERVER(inode);
6943 struct rpc_clnt *clnt = server->client;
6944 struct nfs4_fsid_present_arg args = {
6945 .fh = NFS_FH(inode),
6947 struct nfs4_fsid_present_res res = {
6949 struct rpc_message msg = {
6950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6957 res.fh = nfs_alloc_fhandle();
6961 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6962 nfs4_set_sequence_privileged(&args.seq_args);
6963 status = nfs4_call_sync_sequence(clnt, server, &msg,
6964 &args.seq_args, &res.seq_res);
6965 nfs_free_fhandle(res.fh);
6966 if (status == NFS4_OK &&
6967 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6968 status = -NFS4ERR_LEASE_MOVED;
6972 #endif /* CONFIG_NFS_V4_1 */
6975 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6976 * @inode: inode on FSID to check
6977 * @cred: credential to use for this operation
6979 * Server indicates whether the FSID is present, moved, or not
6980 * recognized. This operation is necessary to clear a LEASE_MOVED
6981 * condition for this client ID.
6983 * Returns NFS4_OK if the FSID is present on this server,
6984 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6985 * NFS4ERR code if some error occurred on the server, or a
6986 * negative errno if a local failure occurred.
6988 int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6990 struct nfs_server *server = NFS_SERVER(inode);
6991 struct nfs_client *clp = server->nfs_client;
6992 const struct nfs4_mig_recovery_ops *ops =
6993 clp->cl_mvops->mig_recovery_ops;
6994 struct nfs4_exception exception = { };
6997 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6998 (unsigned long long)server->fsid.major,
6999 (unsigned long long)server->fsid.minor,
7001 nfs_display_fhandle(NFS_FH(inode), __func__);
7004 status = ops->fsid_present(inode, cred);
7005 if (status != -NFS4ERR_DELAY)
7007 nfs4_handle_exception(server, status, &exception);
7008 } while (exception.retry);
7013 * If 'use_integrity' is true and the state managment nfs_client
7014 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7015 * and the machine credential as per RFC3530bis and RFC5661 Security
7016 * Considerations sections. Otherwise, just use the user cred with the
7017 * filesystem's rpc_client.
7019 static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
7022 struct nfs4_secinfo_arg args = {
7023 .dir_fh = NFS_FH(dir),
7026 struct nfs4_secinfo_res res = {
7029 struct rpc_message msg = {
7030 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7034 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7035 struct rpc_cred *cred = NULL;
7037 if (use_integrity) {
7038 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7039 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7040 msg.rpc_cred = cred;
7043 dprintk("NFS call secinfo %s\n", name->name);
7045 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7046 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7048 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7050 dprintk("NFS reply secinfo: %d\n", status);
7058 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7059 struct nfs4_secinfo_flavors *flavors)
7061 struct nfs4_exception exception = { };
7064 err = -NFS4ERR_WRONGSEC;
7066 /* try to use integrity protection with machine cred */
7067 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7068 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7071 * if unable to use integrity protection, or SECINFO with
7072 * integrity protection returns NFS4ERR_WRONGSEC (which is
7073 * disallowed by spec, but exists in deployed servers) use
7074 * the current filesystem's rpc_client and the user cred.
7076 if (err == -NFS4ERR_WRONGSEC)
7077 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7079 trace_nfs4_secinfo(dir, name, err);
7080 err = nfs4_handle_exception(NFS_SERVER(dir), err,
7082 } while (exception.retry);
7086 #ifdef CONFIG_NFS_V4_1
7088 * Check the exchange flags returned by the server for invalid flags, having
7089 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7092 static int nfs4_check_cl_exchange_flags(u32 flags)
7094 if (flags & ~EXCHGID4_FLAG_MASK_R)
7096 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7097 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7099 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7103 return -NFS4ERR_INVAL;
7107 nfs41_same_server_scope(struct nfs41_server_scope *a,
7108 struct nfs41_server_scope *b)
7110 if (a->server_scope_sz != b->server_scope_sz)
7112 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
7116 nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7120 static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7121 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7125 * nfs4_proc_bind_one_conn_to_session()
7127 * The 4.1 client currently uses the same TCP connection for the
7128 * fore and backchannel.
7131 int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7132 struct rpc_xprt *xprt,
7133 struct nfs_client *clp,
7134 struct rpc_cred *cred)
7137 struct nfs41_bind_conn_to_session_args args = {
7139 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7141 struct nfs41_bind_conn_to_session_res res;
7142 struct rpc_message msg = {
7144 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
7149 struct rpc_task_setup task_setup_data = {
7152 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
7153 .rpc_message = &msg,
7154 .flags = RPC_TASK_TIMEOUT,
7156 struct rpc_task *task;
7158 dprintk("--> %s\n", __func__);
7160 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7161 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7162 args.dir = NFS4_CDFC4_FORE;
7164 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7165 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7166 args.dir = NFS4_CDFC4_FORE;
7168 task = rpc_run_task(&task_setup_data);
7169 if (!IS_ERR(task)) {
7170 status = task->tk_status;
7173 status = PTR_ERR(task);
7174 trace_nfs4_bind_conn_to_session(clp, status);
7176 if (memcmp(res.sessionid.data,
7177 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7178 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7182 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7183 dprintk("NFS: %s: Unexpected direction from server\n",
7188 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7189 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7196 dprintk("<-- %s status= %d\n", __func__, status);
7200 struct rpc_bind_conn_calldata {
7201 struct nfs_client *clp;
7202 struct rpc_cred *cred;
7206 nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7207 struct rpc_xprt *xprt,
7210 struct rpc_bind_conn_calldata *p = calldata;
7212 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7215 int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7217 struct rpc_bind_conn_calldata data = {
7221 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7222 nfs4_proc_bind_conn_to_session_callback, &data);
7226 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7227 * and operations we'd like to see to enable certain features in the allow map
7229 static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7230 .how = SP4_MACH_CRED,
7231 .enforce.u.words = {
7232 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7233 1 << (OP_EXCHANGE_ID - 32) |
7234 1 << (OP_CREATE_SESSION - 32) |
7235 1 << (OP_DESTROY_SESSION - 32) |
7236 1 << (OP_DESTROY_CLIENTID - 32)
7239 [0] = 1 << (OP_CLOSE) |
7240 1 << (OP_OPEN_DOWNGRADE) |
7242 1 << (OP_DELEGRETURN) |
7244 [1] = 1 << (OP_SECINFO - 32) |
7245 1 << (OP_SECINFO_NO_NAME - 32) |
7246 1 << (OP_LAYOUTRETURN - 32) |
7247 1 << (OP_TEST_STATEID - 32) |
7248 1 << (OP_FREE_STATEID - 32) |
7249 1 << (OP_WRITE - 32)
7254 * Select the state protection mode for client `clp' given the server results
7255 * from exchange_id in `sp'.
7257 * Returns 0 on success, negative errno otherwise.
7259 static int nfs4_sp4_select_mode(struct nfs_client *clp,
7260 struct nfs41_state_protection *sp)
7262 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7263 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7264 1 << (OP_EXCHANGE_ID - 32) |
7265 1 << (OP_CREATE_SESSION - 32) |
7266 1 << (OP_DESTROY_SESSION - 32) |
7267 1 << (OP_DESTROY_CLIENTID - 32)
7271 if (sp->how == SP4_MACH_CRED) {
7272 /* Print state protect result */
7273 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7274 for (i = 0; i <= LAST_NFS4_OP; i++) {
7275 if (test_bit(i, sp->enforce.u.longs))
7276 dfprintk(MOUNT, " enforce op %d\n", i);
7277 if (test_bit(i, sp->allow.u.longs))
7278 dfprintk(MOUNT, " allow op %d\n", i);
7281 /* make sure nothing is on enforce list that isn't supported */
7282 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7283 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7284 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7290 * Minimal mode - state operations are allowed to use machine
7291 * credential. Note this already happens by default, so the
7292 * client doesn't have to do anything more than the negotiation.
7294 * NOTE: we don't care if EXCHANGE_ID is in the list -
7295 * we're already using the machine cred for exchange_id
7296 * and will never use a different cred.
7298 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7299 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7300 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7301 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7302 dfprintk(MOUNT, "sp4_mach_cred:\n");
7303 dfprintk(MOUNT, " minimal mode enabled\n");
7304 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7306 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7310 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
7311 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7312 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
7313 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7314 dfprintk(MOUNT, " cleanup mode enabled\n");
7315 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7318 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7319 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7320 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7321 &clp->cl_sp4_flags);
7324 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7325 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7326 dfprintk(MOUNT, " secinfo mode enabled\n");
7327 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7330 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7331 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7332 dfprintk(MOUNT, " stateid mode enabled\n");
7333 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7336 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7337 dfprintk(MOUNT, " write mode enabled\n");
7338 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7341 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7342 dfprintk(MOUNT, " commit mode enabled\n");
7343 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7350 struct nfs41_exchange_id_data {
7351 struct nfs41_exchange_id_res res;
7352 struct nfs41_exchange_id_args args;
7353 struct rpc_xprt *xprt;
7357 static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7359 struct nfs41_exchange_id_data *cdata =
7360 (struct nfs41_exchange_id_data *)data;
7361 struct nfs_client *clp = cdata->args.client;
7362 int status = task->tk_status;
7364 trace_nfs4_exchange_id(clp, status);
7367 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
7369 if (cdata->xprt && status == 0) {
7370 status = nfs4_detect_session_trunking(clp, &cdata->res,
7376 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7379 clp->cl_clientid = cdata->res.clientid;
7380 clp->cl_exchange_flags = cdata->res.flags;
7381 /* Client ID is not confirmed */
7382 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7383 clear_bit(NFS4_SESSION_ESTABLISHED,
7384 &clp->cl_session->session_state);
7385 clp->cl_seqid = cdata->res.seqid;
7388 kfree(clp->cl_serverowner);
7389 clp->cl_serverowner = cdata->res.server_owner;
7390 cdata->res.server_owner = NULL;
7392 /* use the most recent implementation id */
7393 kfree(clp->cl_implid);
7394 clp->cl_implid = cdata->res.impl_id;
7395 cdata->res.impl_id = NULL;
7397 if (clp->cl_serverscope != NULL &&
7398 !nfs41_same_server_scope(clp->cl_serverscope,
7399 cdata->res.server_scope)) {
7400 dprintk("%s: server_scope mismatch detected\n",
7402 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7403 kfree(clp->cl_serverscope);
7404 clp->cl_serverscope = NULL;
7407 if (clp->cl_serverscope == NULL) {
7408 clp->cl_serverscope = cdata->res.server_scope;
7409 cdata->res.server_scope = NULL;
7411 /* Save the EXCHANGE_ID verifier session trunk tests */
7412 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7413 sizeof(clp->cl_confirm.data));
7416 cdata->rpc_status = status;
7420 static void nfs4_exchange_id_release(void *data)
7422 struct nfs41_exchange_id_data *cdata =
7423 (struct nfs41_exchange_id_data *)data;
7426 xprt_put(cdata->xprt);
7427 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7429 nfs_put_client(cdata->args.client);
7430 kfree(cdata->res.impl_id);
7431 kfree(cdata->res.server_scope);
7432 kfree(cdata->res.server_owner);
7436 static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7437 .rpc_call_done = nfs4_exchange_id_done,
7438 .rpc_release = nfs4_exchange_id_release,
7442 * _nfs4_proc_exchange_id()
7444 * Wrapper for EXCHANGE_ID operation.
7446 static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7447 u32 sp4_how, struct rpc_xprt *xprt)
7449 nfs4_verifier verifier;
7450 struct rpc_message msg = {
7451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7454 struct rpc_task_setup task_setup_data = {
7455 .rpc_client = clp->cl_rpcclient,
7456 .callback_ops = &nfs4_exchange_id_call_ops,
7457 .rpc_message = &msg,
7458 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7460 struct nfs41_exchange_id_data *calldata;
7461 struct rpc_task *task;
7464 if (!atomic_inc_not_zero(&clp->cl_count))
7468 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7473 nfs4_init_boot_verifier(clp, &verifier);
7475 status = nfs4_init_uniform_client_string(clp);
7479 dprintk("NFS call exchange_id auth=%s, '%s'\n",
7480 clp->cl_rpcclient->cl_auth->au_ops->au_name,
7483 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7486 if (unlikely(calldata->res.server_owner == NULL))
7489 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
7491 if (unlikely(calldata->res.server_scope == NULL))
7492 goto out_server_owner;
7494 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7495 if (unlikely(calldata->res.impl_id == NULL))
7496 goto out_server_scope;
7500 calldata->args.state_protect.how = SP4_NONE;
7504 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
7514 calldata->xprt = xprt;
7515 task_setup_data.rpc_xprt = xprt;
7516 task_setup_data.flags =
7517 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7518 calldata->args.verifier = &clp->cl_confirm;
7520 calldata->args.verifier = &verifier;
7522 calldata->args.client = clp;
7523 #ifdef CONFIG_NFS_V4_1_MIGRATION
7524 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7525 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7526 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7528 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7529 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7531 msg.rpc_argp = &calldata->args;
7532 msg.rpc_resp = &calldata->res;
7533 task_setup_data.callback_data = calldata;
7535 task = rpc_run_task(&task_setup_data);
7537 return PTR_ERR(task);
7540 status = rpc_wait_for_completion_task(task);
7542 status = calldata->rpc_status;
7543 } else /* session trunking test */
7544 status = calldata->rpc_status;
7548 if (clp->cl_implid != NULL)
7549 dprintk("NFS reply exchange_id: Server Implementation ID: "
7550 "domain: %s, name: %s, date: %llu,%u\n",
7551 clp->cl_implid->domain, clp->cl_implid->name,
7552 clp->cl_implid->date.seconds,
7553 clp->cl_implid->date.nseconds);
7554 dprintk("NFS reply exchange_id: %d\n", status);
7558 kfree(calldata->res.impl_id);
7560 kfree(calldata->res.server_scope);
7562 kfree(calldata->res.server_owner);
7565 nfs_put_client(clp);
7570 * nfs4_proc_exchange_id()
7572 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7574 * Since the clientid has expired, all compounds using sessions
7575 * associated with the stale clientid will be returning
7576 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7577 * be in some phase of session reset.
7579 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7581 int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7583 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7586 /* try SP4_MACH_CRED if krb5i/p */
7587 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7588 authflavor == RPC_AUTH_GSS_KRB5P) {
7589 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
7595 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
7599 * nfs4_test_session_trunk
7601 * This is an add_xprt_test() test function called from
7602 * rpc_clnt_setup_test_and_add_xprt.
7604 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7605 * and is dereferrenced in nfs4_exchange_id_release
7607 * Upon success, add the new transport to the rpc_clnt
7609 * @clnt: struct rpc_clnt to get new transport
7610 * @xprt: the rpc_xprt to test
7611 * @data: call data for _nfs4_proc_exchange_id.
7613 int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7616 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7619 dprintk("--> %s try %s\n", __func__,
7620 xprt->address_strings[RPC_DISPLAY_ADDR]);
7622 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7624 /* Test connection for session trunking. Async exchange_id call */
7625 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
7627 EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
7629 static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7630 struct rpc_cred *cred)
7632 struct rpc_message msg = {
7633 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7639 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7640 trace_nfs4_destroy_clientid(clp, status);
7642 dprintk("NFS: Got error %d from the server %s on "
7643 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7647 static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7648 struct rpc_cred *cred)
7653 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7654 ret = _nfs4_proc_destroy_clientid(clp, cred);
7656 case -NFS4ERR_DELAY:
7657 case -NFS4ERR_CLIENTID_BUSY:
7667 int nfs4_destroy_clientid(struct nfs_client *clp)
7669 struct rpc_cred *cred;
7672 if (clp->cl_mvops->minor_version < 1)
7674 if (clp->cl_exchange_flags == 0)
7676 if (clp->cl_preserve_clid)
7678 cred = nfs4_get_clid_cred(clp);
7679 ret = nfs4_proc_destroy_clientid(clp, cred);
7684 case -NFS4ERR_STALE_CLIENTID:
7685 clp->cl_exchange_flags = 0;
7691 struct nfs4_get_lease_time_data {
7692 struct nfs4_get_lease_time_args *args;
7693 struct nfs4_get_lease_time_res *res;
7694 struct nfs_client *clp;
7697 static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7700 struct nfs4_get_lease_time_data *data =
7701 (struct nfs4_get_lease_time_data *)calldata;
7703 dprintk("--> %s\n", __func__);
7704 /* just setup sequence, do not trigger session recovery
7705 since we're invoked within one */
7706 nfs4_setup_sequence(data->clp,
7707 &data->args->la_seq_args,
7708 &data->res->lr_seq_res,
7710 dprintk("<-- %s\n", __func__);
7714 * Called from nfs4_state_manager thread for session setup, so don't recover
7715 * from sequence operation or clientid errors.
7717 static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7719 struct nfs4_get_lease_time_data *data =
7720 (struct nfs4_get_lease_time_data *)calldata;
7722 dprintk("--> %s\n", __func__);
7723 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7725 switch (task->tk_status) {
7726 case -NFS4ERR_DELAY:
7727 case -NFS4ERR_GRACE:
7728 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7729 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7730 task->tk_status = 0;
7732 case -NFS4ERR_RETRY_UNCACHED_REP:
7733 rpc_restart_call_prepare(task);
7736 dprintk("<-- %s\n", __func__);
7739 static const struct rpc_call_ops nfs4_get_lease_time_ops = {
7740 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7741 .rpc_call_done = nfs4_get_lease_time_done,
7744 int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7746 struct rpc_task *task;
7747 struct nfs4_get_lease_time_args args;
7748 struct nfs4_get_lease_time_res res = {
7749 .lr_fsinfo = fsinfo,
7751 struct nfs4_get_lease_time_data data = {
7756 struct rpc_message msg = {
7757 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7761 struct rpc_task_setup task_setup = {
7762 .rpc_client = clp->cl_rpcclient,
7763 .rpc_message = &msg,
7764 .callback_ops = &nfs4_get_lease_time_ops,
7765 .callback_data = &data,
7766 .flags = RPC_TASK_TIMEOUT,
7770 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
7771 nfs4_set_sequence_privileged(&args.la_seq_args);
7772 dprintk("--> %s\n", __func__);
7773 task = rpc_run_task(&task_setup);
7776 status = PTR_ERR(task);
7778 status = task->tk_status;
7781 dprintk("<-- %s return %d\n", __func__, status);
7787 * Initialize the values to be used by the client in CREATE_SESSION
7788 * If nfs4_init_session set the fore channel request and response sizes,
7791 * Set the back channel max_resp_sz_cached to zero to force the client to
7792 * always set csa_cachethis to FALSE because the current implementation
7793 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7795 static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7796 struct rpc_clnt *clnt)
7798 unsigned int max_rqst_sz, max_resp_sz;
7799 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
7801 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7802 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
7804 /* Fore channel attributes */
7805 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7806 args->fc_attrs.max_resp_sz = max_resp_sz;
7807 args->fc_attrs.max_ops = NFS4_MAX_OPS;
7808 args->fc_attrs.max_reqs = max_session_slots;
7810 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
7811 "max_ops=%u max_reqs=%u\n",
7813 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
7814 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
7816 /* Back channel attributes */
7817 args->bc_attrs.max_rqst_sz = max_bc_payload;
7818 args->bc_attrs.max_resp_sz = max_bc_payload;
7819 args->bc_attrs.max_resp_sz_cached = 0;
7820 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7821 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
7823 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7824 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7826 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7827 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7828 args->bc_attrs.max_reqs);
7831 static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7832 struct nfs41_create_session_res *res)
7834 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7835 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
7837 if (rcvd->max_resp_sz > sent->max_resp_sz)
7840 * Our requested max_ops is the minimum we need; we're not
7841 * prepared to break up compounds into smaller pieces than that.
7842 * So, no point even trying to continue if the server won't
7845 if (rcvd->max_ops < sent->max_ops)
7847 if (rcvd->max_reqs == 0)
7849 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7850 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
7854 static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7855 struct nfs41_create_session_res *res)
7857 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7858 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
7860 if (!(res->flags & SESSION4_BACK_CHAN))
7862 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7864 if (rcvd->max_resp_sz < sent->max_resp_sz)
7866 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7868 if (rcvd->max_ops > sent->max_ops)
7870 if (rcvd->max_reqs > sent->max_reqs)
7876 static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7877 struct nfs41_create_session_res *res)
7881 ret = nfs4_verify_fore_channel_attrs(args, res);
7884 return nfs4_verify_back_channel_attrs(args, res);
7887 static void nfs4_update_session(struct nfs4_session *session,
7888 struct nfs41_create_session_res *res)
7890 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7891 /* Mark client id and session as being confirmed */
7892 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7893 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
7894 session->flags = res->flags;
7895 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
7896 if (res->flags & SESSION4_BACK_CHAN)
7897 memcpy(&session->bc_attrs, &res->bc_attrs,
7898 sizeof(session->bc_attrs));
7901 static int _nfs4_proc_create_session(struct nfs_client *clp,
7902 struct rpc_cred *cred)
7904 struct nfs4_session *session = clp->cl_session;
7905 struct nfs41_create_session_args args = {
7907 .clientid = clp->cl_clientid,
7908 .seqid = clp->cl_seqid,
7909 .cb_program = NFS4_CALLBACK,
7911 struct nfs41_create_session_res res;
7913 struct rpc_message msg = {
7914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7921 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
7922 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
7924 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
7925 trace_nfs4_create_session(clp, status);
7928 case -NFS4ERR_STALE_CLIENTID:
7929 case -NFS4ERR_DELAY:
7938 /* Verify the session's negotiated channel_attrs values */
7939 status = nfs4_verify_channel_attrs(&args, &res);
7940 /* Increment the clientid slot sequence id */
7943 nfs4_update_session(session, &res);
7950 * Issues a CREATE_SESSION operation to the server.
7951 * It is the responsibility of the caller to verify the session is
7952 * expired before calling this routine.
7954 int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
7958 struct nfs4_session *session = clp->cl_session;
7960 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7962 status = _nfs4_proc_create_session(clp, cred);
7966 /* Init or reset the session slot tables */
7967 status = nfs4_setup_session_slot_tables(session);
7968 dprintk("slot table setup returned %d\n", status);
7972 ptr = (unsigned *)&session->sess_id.data[0];
7973 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7974 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
7976 dprintk("<-- %s\n", __func__);
7981 * Issue the over-the-wire RPC DESTROY_SESSION.
7982 * The caller must serialize access to this routine.
7984 int nfs4_proc_destroy_session(struct nfs4_session *session,
7985 struct rpc_cred *cred)
7987 struct rpc_message msg = {
7988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7989 .rpc_argp = session,
7994 dprintk("--> nfs4_proc_destroy_session\n");
7996 /* session is still being setup */
7997 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8000 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
8001 trace_nfs4_destroy_session(session->clp, status);
8004 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
8005 "Session has been destroyed regardless...\n", status);
8007 dprintk("<-- nfs4_proc_destroy_session\n");
8012 * Renew the cl_session lease.
8014 struct nfs4_sequence_data {
8015 struct nfs_client *clp;
8016 struct nfs4_sequence_args args;
8017 struct nfs4_sequence_res res;
8020 static void nfs41_sequence_release(void *data)
8022 struct nfs4_sequence_data *calldata = data;
8023 struct nfs_client *clp = calldata->clp;
8025 if (atomic_read(&clp->cl_count) > 1)
8026 nfs4_schedule_state_renewal(clp);
8027 nfs_put_client(clp);
8031 static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8033 switch(task->tk_status) {
8034 case -NFS4ERR_DELAY:
8035 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8038 nfs4_schedule_lease_recovery(clp);
8043 static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
8045 struct nfs4_sequence_data *calldata = data;
8046 struct nfs_client *clp = calldata->clp;
8048 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8051 trace_nfs4_sequence(clp, task->tk_status);
8052 if (task->tk_status < 0) {
8053 dprintk("%s ERROR %d\n", __func__, task->tk_status);
8054 if (atomic_read(&clp->cl_count) == 1)
8057 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8058 rpc_restart_call_prepare(task);
8062 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
8064 dprintk("<-- %s\n", __func__);
8067 static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8069 struct nfs4_sequence_data *calldata = data;
8070 struct nfs_client *clp = calldata->clp;
8071 struct nfs4_sequence_args *args;
8072 struct nfs4_sequence_res *res;
8074 args = task->tk_msg.rpc_argp;
8075 res = task->tk_msg.rpc_resp;
8077 nfs4_setup_sequence(clp, args, res, task);
8080 static const struct rpc_call_ops nfs41_sequence_ops = {
8081 .rpc_call_done = nfs41_sequence_call_done,
8082 .rpc_call_prepare = nfs41_sequence_prepare,
8083 .rpc_release = nfs41_sequence_release,
8086 static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8087 struct rpc_cred *cred,
8090 struct nfs4_sequence_data *calldata;
8091 struct rpc_message msg = {
8092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8095 struct rpc_task_setup task_setup_data = {
8096 .rpc_client = clp->cl_rpcclient,
8097 .rpc_message = &msg,
8098 .callback_ops = &nfs41_sequence_ops,
8099 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
8102 if (!atomic_inc_not_zero(&clp->cl_count))
8103 return ERR_PTR(-EIO);
8104 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8105 if (calldata == NULL) {
8106 nfs_put_client(clp);
8107 return ERR_PTR(-ENOMEM);
8109 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8111 nfs4_set_sequence_privileged(&calldata->args);
8112 msg.rpc_argp = &calldata->args;
8113 msg.rpc_resp = &calldata->res;
8114 calldata->clp = clp;
8115 task_setup_data.callback_data = calldata;
8117 return rpc_run_task(&task_setup_data);
8120 static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
8122 struct rpc_task *task;
8125 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
8127 task = _nfs41_proc_sequence(clp, cred, false);
8129 ret = PTR_ERR(task);
8131 rpc_put_task_async(task);
8132 dprintk("<-- %s status=%d\n", __func__, ret);
8136 static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8138 struct rpc_task *task;
8141 task = _nfs41_proc_sequence(clp, cred, true);
8143 ret = PTR_ERR(task);
8146 ret = rpc_wait_for_completion_task(task);
8148 ret = task->tk_status;
8151 dprintk("<-- %s status=%d\n", __func__, ret);
8155 struct nfs4_reclaim_complete_data {
8156 struct nfs_client *clp;
8157 struct nfs41_reclaim_complete_args arg;
8158 struct nfs41_reclaim_complete_res res;
8161 static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8163 struct nfs4_reclaim_complete_data *calldata = data;
8165 nfs4_setup_sequence(calldata->clp,
8166 &calldata->arg.seq_args,
8167 &calldata->res.seq_res,
8171 static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8173 switch(task->tk_status) {
8175 case -NFS4ERR_COMPLETE_ALREADY:
8176 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8178 case -NFS4ERR_DELAY:
8179 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8181 case -NFS4ERR_RETRY_UNCACHED_REP:
8184 nfs4_schedule_lease_recovery(clp);
8189 static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8191 struct nfs4_reclaim_complete_data *calldata = data;
8192 struct nfs_client *clp = calldata->clp;
8193 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8195 dprintk("--> %s\n", __func__);
8196 if (!nfs41_sequence_done(task, res))
8199 trace_nfs4_reclaim_complete(clp, task->tk_status);
8200 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8201 rpc_restart_call_prepare(task);
8204 dprintk("<-- %s\n", __func__);
8207 static void nfs4_free_reclaim_complete_data(void *data)
8209 struct nfs4_reclaim_complete_data *calldata = data;
8214 static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8215 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8216 .rpc_call_done = nfs4_reclaim_complete_done,
8217 .rpc_release = nfs4_free_reclaim_complete_data,
8221 * Issue a global reclaim complete.
8223 static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8224 struct rpc_cred *cred)
8226 struct nfs4_reclaim_complete_data *calldata;
8227 struct rpc_task *task;
8228 struct rpc_message msg = {
8229 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
8232 struct rpc_task_setup task_setup_data = {
8233 .rpc_client = clp->cl_rpcclient,
8234 .rpc_message = &msg,
8235 .callback_ops = &nfs4_reclaim_complete_call_ops,
8236 .flags = RPC_TASK_ASYNC,
8238 int status = -ENOMEM;
8240 dprintk("--> %s\n", __func__);
8241 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
8242 if (calldata == NULL)
8244 calldata->clp = clp;
8245 calldata->arg.one_fs = 0;
8247 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8248 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
8249 msg.rpc_argp = &calldata->arg;
8250 msg.rpc_resp = &calldata->res;
8251 task_setup_data.callback_data = calldata;
8252 task = rpc_run_task(&task_setup_data);
8254 status = PTR_ERR(task);
8257 status = rpc_wait_for_completion_task(task);
8259 status = task->tk_status;
8263 dprintk("<-- %s status=%d\n", __func__, status);
8268 nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8270 struct nfs4_layoutget *lgp = calldata;
8271 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8273 dprintk("--> %s\n", __func__);
8274 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
8275 &lgp->res.seq_res, task);
8276 dprintk("<-- %s\n", __func__);
8279 static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8281 struct nfs4_layoutget *lgp = calldata;
8283 dprintk("--> %s\n", __func__);
8284 nfs41_sequence_process(task, &lgp->res.seq_res);
8285 dprintk("<-- %s\n", __func__);
8289 nfs4_layoutget_handle_exception(struct rpc_task *task,
8290 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8292 struct inode *inode = lgp->args.inode;
8293 struct nfs_server *server = NFS_SERVER(inode);
8294 struct pnfs_layout_hdr *lo;
8295 int nfs4err = task->tk_status;
8296 int err, status = 0;
8299 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
8306 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8307 * on the file. set tk_status to -ENODATA to tell upper layer to
8310 case -NFS4ERR_LAYOUTUNAVAILABLE:
8314 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8315 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8317 case -NFS4ERR_BADLAYOUT:
8318 status = -EOVERFLOW;
8321 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
8322 * (or clients) writing to the same RAID stripe except when
8323 * the minlength argument is 0 (see RFC5661 section 18.43.3).
8325 * Treat it like we would RECALLCONFLICT -- we retry for a little
8326 * while, and then eventually give up.
8328 case -NFS4ERR_LAYOUTTRYLATER:
8329 if (lgp->args.minlength == 0) {
8330 status = -EOVERFLOW;
8335 case -NFS4ERR_RECALLCONFLICT:
8336 status = -ERECALLCONFLICT;
8338 case -NFS4ERR_DELEG_REVOKED:
8339 case -NFS4ERR_ADMIN_REVOKED:
8340 case -NFS4ERR_EXPIRED:
8341 case -NFS4ERR_BAD_STATEID:
8342 exception->timeout = 0;
8343 spin_lock(&inode->i_lock);
8344 lo = NFS_I(inode)->layout;
8345 /* If the open stateid was bad, then recover it. */
8346 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8347 nfs4_stateid_match_other(&lgp->args.stateid,
8348 &lgp->args.ctx->state->stateid)) {
8349 spin_unlock(&inode->i_lock);
8350 exception->state = lgp->args.ctx->state;
8351 exception->stateid = &lgp->args.stateid;
8356 * Mark the bad layout state as invalid, then retry
8358 pnfs_mark_layout_stateid_invalid(lo, &head);
8359 spin_unlock(&inode->i_lock);
8360 pnfs_free_lseg_list(&head);
8365 nfs4_sequence_free_slot(&lgp->res.seq_res);
8366 err = nfs4_handle_exception(server, nfs4err, exception);
8368 if (exception->retry)
8374 dprintk("<-- %s\n", __func__);
8378 static size_t max_response_pages(struct nfs_server *server)
8380 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8381 return nfs_page_array_len(0, max_resp_sz);
8384 static void nfs4_free_pages(struct page **pages, size_t size)
8391 for (i = 0; i < size; i++) {
8394 __free_page(pages[i]);
8399 static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8401 struct page **pages;
8404 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8406 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8410 for (i = 0; i < size; i++) {
8411 pages[i] = alloc_page(gfp_flags);
8413 dprintk("%s: failed to allocate page\n", __func__);
8414 nfs4_free_pages(pages, size);
8422 static void nfs4_layoutget_release(void *calldata)
8424 struct nfs4_layoutget *lgp = calldata;
8425 struct inode *inode = lgp->args.inode;
8426 struct nfs_server *server = NFS_SERVER(inode);
8427 size_t max_pages = max_response_pages(server);
8429 dprintk("--> %s\n", __func__);
8430 nfs4_free_pages(lgp->args.layout.pages, max_pages);
8431 pnfs_put_layout_hdr(NFS_I(inode)->layout);
8432 put_nfs_open_context(lgp->args.ctx);
8434 dprintk("<-- %s\n", __func__);
8437 static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8438 .rpc_call_prepare = nfs4_layoutget_prepare,
8439 .rpc_call_done = nfs4_layoutget_done,
8440 .rpc_release = nfs4_layoutget_release,
8443 struct pnfs_layout_segment *
8444 nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
8446 struct inode *inode = lgp->args.inode;
8447 struct nfs_server *server = NFS_SERVER(inode);
8448 size_t max_pages = max_response_pages(server);
8449 struct rpc_task *task;
8450 struct rpc_message msg = {
8451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8452 .rpc_argp = &lgp->args,
8453 .rpc_resp = &lgp->res,
8454 .rpc_cred = lgp->cred,
8456 struct rpc_task_setup task_setup_data = {
8457 .rpc_client = server->client,
8458 .rpc_message = &msg,
8459 .callback_ops = &nfs4_layoutget_call_ops,
8460 .callback_data = lgp,
8461 .flags = RPC_TASK_ASYNC,
8463 struct pnfs_layout_segment *lseg = NULL;
8464 struct nfs4_exception exception = {
8466 .timeout = *timeout,
8470 dprintk("--> %s\n", __func__);
8472 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8473 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8475 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8476 if (!lgp->args.layout.pages) {
8477 nfs4_layoutget_release(lgp);
8478 return ERR_PTR(-ENOMEM);
8480 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8482 lgp->res.layoutp = &lgp->args.layout;
8483 lgp->res.seq_res.sr_slot = NULL;
8484 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
8486 task = rpc_run_task(&task_setup_data);
8488 return ERR_CAST(task);
8489 status = rpc_wait_for_completion_task(task);
8491 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8492 *timeout = exception.timeout;
8495 trace_nfs4_layoutget(lgp->args.ctx,
8501 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8502 if (status == 0 && lgp->res.layoutp->len)
8503 lseg = pnfs_layout_process(lgp);
8504 nfs4_sequence_free_slot(&lgp->res.seq_res);
8506 dprintk("<-- %s status=%d\n", __func__, status);
8508 return ERR_PTR(status);
8513 nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8515 struct nfs4_layoutreturn *lrp = calldata;
8517 dprintk("--> %s\n", __func__);
8518 nfs4_setup_sequence(lrp->clp,
8519 &lrp->args.seq_args,
8524 static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8526 struct nfs4_layoutreturn *lrp = calldata;
8527 struct nfs_server *server;
8529 dprintk("--> %s\n", __func__);
8531 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
8534 server = NFS_SERVER(lrp->args.inode);
8535 switch (task->tk_status) {
8537 task->tk_status = 0;
8540 case -NFS4ERR_DELAY:
8541 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
8543 nfs4_sequence_free_slot(&lrp->res.seq_res);
8544 rpc_restart_call_prepare(task);
8547 dprintk("<-- %s\n", __func__);
8550 static void nfs4_layoutreturn_release(void *calldata)
8552 struct nfs4_layoutreturn *lrp = calldata;
8553 struct pnfs_layout_hdr *lo = lrp->args.layout;
8555 dprintk("--> %s\n", __func__);
8556 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
8557 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
8558 nfs4_sequence_free_slot(&lrp->res.seq_res);
8559 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8560 lrp->ld_private.ops->free(&lrp->ld_private);
8561 pnfs_put_layout_hdr(lrp->args.layout);
8562 nfs_iput_and_deactive(lrp->inode);
8564 dprintk("<-- %s\n", __func__);
8567 static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8568 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8569 .rpc_call_done = nfs4_layoutreturn_done,
8570 .rpc_release = nfs4_layoutreturn_release,
8573 int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
8575 struct rpc_task *task;
8576 struct rpc_message msg = {
8577 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8578 .rpc_argp = &lrp->args,
8579 .rpc_resp = &lrp->res,
8580 .rpc_cred = lrp->cred,
8582 struct rpc_task_setup task_setup_data = {
8583 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
8584 .rpc_message = &msg,
8585 .callback_ops = &nfs4_layoutreturn_call_ops,
8586 .callback_data = lrp,
8590 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8591 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8592 &task_setup_data.rpc_client, &msg);
8594 dprintk("--> %s\n", __func__);
8596 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8598 nfs4_layoutreturn_release(lrp);
8601 task_setup_data.flags |= RPC_TASK_ASYNC;
8603 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
8604 task = rpc_run_task(&task_setup_data);
8606 return PTR_ERR(task);
8608 status = task->tk_status;
8609 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
8610 dprintk("<-- %s status=%d\n", __func__, status);
8616 _nfs4_proc_getdeviceinfo(struct nfs_server *server,
8617 struct pnfs_device *pdev,
8618 struct rpc_cred *cred)
8620 struct nfs4_getdeviceinfo_args args = {
8622 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8623 NOTIFY_DEVICEID4_DELETE,
8625 struct nfs4_getdeviceinfo_res res = {
8628 struct rpc_message msg = {
8629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8636 dprintk("--> %s\n", __func__);
8637 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
8638 if (res.notification & ~args.notify_types)
8639 dprintk("%s: unsupported notification\n", __func__);
8640 if (res.notification != args.notify_types)
8643 dprintk("<-- %s status=%d\n", __func__, status);
8648 int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8649 struct pnfs_device *pdev,
8650 struct rpc_cred *cred)
8652 struct nfs4_exception exception = { };
8656 err = nfs4_handle_exception(server,
8657 _nfs4_proc_getdeviceinfo(server, pdev, cred),
8659 } while (exception.retry);
8662 EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8664 static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8666 struct nfs4_layoutcommit_data *data = calldata;
8667 struct nfs_server *server = NFS_SERVER(data->args.inode);
8669 nfs4_setup_sequence(server->nfs_client,
8670 &data->args.seq_args,
8676 nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8678 struct nfs4_layoutcommit_data *data = calldata;
8679 struct nfs_server *server = NFS_SERVER(data->args.inode);
8681 if (!nfs41_sequence_done(task, &data->res.seq_res))
8684 switch (task->tk_status) { /* Just ignore these failures */
8685 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8686 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8687 case -NFS4ERR_BADLAYOUT: /* no layout */
8688 case -NFS4ERR_GRACE: /* loca_recalim always false */
8689 task->tk_status = 0;
8693 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
8694 rpc_restart_call_prepare(task);
8700 static void nfs4_layoutcommit_release(void *calldata)
8702 struct nfs4_layoutcommit_data *data = calldata;
8704 pnfs_cleanup_layoutcommit(data);
8705 nfs_post_op_update_inode_force_wcc(data->args.inode,
8707 put_rpccred(data->cred);
8708 nfs_iput_and_deactive(data->inode);
8712 static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8713 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8714 .rpc_call_done = nfs4_layoutcommit_done,
8715 .rpc_release = nfs4_layoutcommit_release,
8719 nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
8721 struct rpc_message msg = {
8722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8723 .rpc_argp = &data->args,
8724 .rpc_resp = &data->res,
8725 .rpc_cred = data->cred,
8727 struct rpc_task_setup task_setup_data = {
8728 .task = &data->task,
8729 .rpc_client = NFS_CLIENT(data->args.inode),
8730 .rpc_message = &msg,
8731 .callback_ops = &nfs4_layoutcommit_ops,
8732 .callback_data = data,
8734 struct rpc_task *task;
8737 dprintk("NFS: initiating layoutcommit call. sync %d "
8738 "lbw: %llu inode %lu\n", sync,
8739 data->args.lastbytewritten,
8740 data->args.inode->i_ino);
8743 data->inode = nfs_igrab_and_active(data->args.inode);
8744 if (data->inode == NULL) {
8745 nfs4_layoutcommit_release(data);
8748 task_setup_data.flags = RPC_TASK_ASYNC;
8750 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
8751 task = rpc_run_task(&task_setup_data);
8753 return PTR_ERR(task);
8755 status = task->tk_status;
8756 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
8757 dprintk("%s: status %d\n", __func__, status);
8763 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8764 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8767 _nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8768 struct nfs_fsinfo *info,
8769 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
8771 struct nfs41_secinfo_no_name_args args = {
8772 .style = SECINFO_STYLE_CURRENT_FH,
8774 struct nfs4_secinfo_res res = {
8777 struct rpc_message msg = {
8778 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8782 struct rpc_clnt *clnt = server->client;
8783 struct rpc_cred *cred = NULL;
8786 if (use_integrity) {
8787 clnt = server->nfs_client->cl_rpcclient;
8788 cred = nfs4_get_clid_cred(server->nfs_client);
8789 msg.rpc_cred = cred;
8792 dprintk("--> %s\n", __func__);
8793 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8795 dprintk("<-- %s status=%d\n", __func__, status);
8804 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8805 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8807 struct nfs4_exception exception = { };
8810 /* first try using integrity protection */
8811 err = -NFS4ERR_WRONGSEC;
8813 /* try to use integrity protection with machine cred */
8814 if (_nfs4_is_integrity_protected(server->nfs_client))
8815 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8819 * if unable to use integrity protection, or SECINFO with
8820 * integrity protection returns NFS4ERR_WRONGSEC (which is
8821 * disallowed by spec, but exists in deployed servers) use
8822 * the current filesystem's rpc_client and the user cred.
8824 if (err == -NFS4ERR_WRONGSEC)
8825 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8830 case -NFS4ERR_WRONGSEC:
8834 err = nfs4_handle_exception(server, err, &exception);
8836 } while (exception.retry);
8842 nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8843 struct nfs_fsinfo *info)
8847 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
8848 struct nfs4_secinfo_flavors *flavors;
8849 struct nfs4_secinfo4 *secinfo;
8852 page = alloc_page(GFP_KERNEL);
8858 flavors = page_address(page);
8859 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8862 * Fall back on "guess and check" method if
8863 * the server doesn't support SECINFO_NO_NAME
8865 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
8866 err = nfs4_find_root_sec(server, fhandle, info);
8872 for (i = 0; i < flavors->num_flavors; i++) {
8873 secinfo = &flavors->flavors[i];
8875 switch (secinfo->flavor) {
8879 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8880 &secinfo->flavor_info);
8883 flavor = RPC_AUTH_MAXFLAVOR;
8887 if (!nfs_auth_info_match(&server->auth_info, flavor))
8888 flavor = RPC_AUTH_MAXFLAVOR;
8890 if (flavor != RPC_AUTH_MAXFLAVOR) {
8891 err = nfs4_lookup_root_sec(server, fhandle,
8898 if (flavor == RPC_AUTH_MAXFLAVOR)
8909 static int _nfs41_test_stateid(struct nfs_server *server,
8910 nfs4_stateid *stateid,
8911 struct rpc_cred *cred)
8914 struct nfs41_test_stateid_args args = {
8917 struct nfs41_test_stateid_res res;
8918 struct rpc_message msg = {
8919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8924 struct rpc_clnt *rpc_client = server->client;
8926 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8929 dprintk("NFS call test_stateid %p\n", stateid);
8930 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8931 nfs4_set_sequence_privileged(&args.seq_args);
8932 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8933 &args.seq_args, &res.seq_res);
8934 if (status != NFS_OK) {
8935 dprintk("NFS reply test_stateid: failed, %d\n", status);
8938 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
8942 static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
8943 int err, struct nfs4_exception *exception)
8945 exception->retry = 0;
8947 case -NFS4ERR_DELAY:
8948 case -NFS4ERR_RETRY_UNCACHED_REP:
8949 nfs4_handle_exception(server, err, exception);
8951 case -NFS4ERR_BADSESSION:
8952 case -NFS4ERR_BADSLOT:
8953 case -NFS4ERR_BAD_HIGH_SLOT:
8954 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8955 case -NFS4ERR_DEADSESSION:
8956 nfs4_do_handle_exception(server, err, exception);
8961 * nfs41_test_stateid - perform a TEST_STATEID operation
8963 * @server: server / transport on which to perform the operation
8964 * @stateid: state ID to test
8967 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8968 * Otherwise a negative NFS4ERR value is returned if the operation
8969 * failed or the state ID is not currently valid.
8971 static int nfs41_test_stateid(struct nfs_server *server,
8972 nfs4_stateid *stateid,
8973 struct rpc_cred *cred)
8975 struct nfs4_exception exception = { };
8978 err = _nfs41_test_stateid(server, stateid, cred);
8979 nfs4_handle_delay_or_session_error(server, err, &exception);
8980 } while (exception.retry);
8984 struct nfs_free_stateid_data {
8985 struct nfs_server *server;
8986 struct nfs41_free_stateid_args args;
8987 struct nfs41_free_stateid_res res;
8990 static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8992 struct nfs_free_stateid_data *data = calldata;
8993 nfs4_setup_sequence(data->server->nfs_client,
8994 &data->args.seq_args,
8999 static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9001 struct nfs_free_stateid_data *data = calldata;
9003 nfs41_sequence_done(task, &data->res.seq_res);
9005 switch (task->tk_status) {
9006 case -NFS4ERR_DELAY:
9007 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
9008 rpc_restart_call_prepare(task);
9012 static void nfs41_free_stateid_release(void *calldata)
9017 static const struct rpc_call_ops nfs41_free_stateid_ops = {
9018 .rpc_call_prepare = nfs41_free_stateid_prepare,
9019 .rpc_call_done = nfs41_free_stateid_done,
9020 .rpc_release = nfs41_free_stateid_release,
9023 static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
9024 const nfs4_stateid *stateid,
9025 struct rpc_cred *cred,
9028 struct rpc_message msg = {
9029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9032 struct rpc_task_setup task_setup = {
9033 .rpc_client = server->client,
9034 .rpc_message = &msg,
9035 .callback_ops = &nfs41_free_stateid_ops,
9036 .flags = RPC_TASK_ASYNC,
9038 struct nfs_free_stateid_data *data;
9040 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9041 &task_setup.rpc_client, &msg);
9043 dprintk("NFS call free_stateid %p\n", stateid);
9044 data = kmalloc(sizeof(*data), GFP_NOFS);
9046 return ERR_PTR(-ENOMEM);
9047 data->server = server;
9048 nfs4_stateid_copy(&data->args.stateid, stateid);
9050 task_setup.callback_data = data;
9052 msg.rpc_argp = &data->args;
9053 msg.rpc_resp = &data->res;
9054 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
9056 nfs4_set_sequence_privileged(&data->args.seq_args);
9058 return rpc_run_task(&task_setup);
9062 * nfs41_free_stateid - perform a FREE_STATEID operation
9064 * @server: server / transport on which to perform the operation
9065 * @stateid: state ID to release
9067 * @is_recovery: set to true if this call needs to be privileged
9069 * Note: this function is always asynchronous.
9071 static int nfs41_free_stateid(struct nfs_server *server,
9072 const nfs4_stateid *stateid,
9073 struct rpc_cred *cred,
9076 struct rpc_task *task;
9078 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
9080 return PTR_ERR(task);
9086 nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
9088 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
9090 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
9091 nfs4_free_lock_state(server, lsp);
9094 static bool nfs41_match_stateid(const nfs4_stateid *s1,
9095 const nfs4_stateid *s2)
9097 if (s1->type != s2->type)
9100 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
9103 if (s1->seqid == s2->seqid)
9106 return s1->seqid == 0 || s2->seqid == 0;
9109 #endif /* CONFIG_NFS_V4_1 */
9111 static bool nfs4_match_stateid(const nfs4_stateid *s1,
9112 const nfs4_stateid *s2)
9114 return nfs4_stateid_match(s1, s2);
9118 static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
9119 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9120 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9121 .recover_open = nfs4_open_reclaim,
9122 .recover_lock = nfs4_lock_reclaim,
9123 .establish_clid = nfs4_init_clientid,
9124 .detect_trunking = nfs40_discover_server_trunking,
9127 #if defined(CONFIG_NFS_V4_1)
9128 static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
9129 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9130 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9131 .recover_open = nfs4_open_reclaim,
9132 .recover_lock = nfs4_lock_reclaim,
9133 .establish_clid = nfs41_init_clientid,
9134 .reclaim_complete = nfs41_proc_reclaim_complete,
9135 .detect_trunking = nfs41_discover_server_trunking,
9137 #endif /* CONFIG_NFS_V4_1 */
9139 static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
9140 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9141 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9142 .recover_open = nfs40_open_expired,
9143 .recover_lock = nfs4_lock_expired,
9144 .establish_clid = nfs4_init_clientid,
9147 #if defined(CONFIG_NFS_V4_1)
9148 static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
9149 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9150 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
9151 .recover_open = nfs41_open_expired,
9152 .recover_lock = nfs41_lock_expired,
9153 .establish_clid = nfs41_init_clientid,
9155 #endif /* CONFIG_NFS_V4_1 */
9157 static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
9158 .sched_state_renewal = nfs4_proc_async_renew,
9159 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
9160 .renew_lease = nfs4_proc_renew,
9163 #if defined(CONFIG_NFS_V4_1)
9164 static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
9165 .sched_state_renewal = nfs41_proc_async_sequence,
9166 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
9167 .renew_lease = nfs4_proc_sequence,
9171 static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
9172 .get_locations = _nfs40_proc_get_locations,
9173 .fsid_present = _nfs40_proc_fsid_present,
9176 #if defined(CONFIG_NFS_V4_1)
9177 static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
9178 .get_locations = _nfs41_proc_get_locations,
9179 .fsid_present = _nfs41_proc_fsid_present,
9181 #endif /* CONFIG_NFS_V4_1 */
9183 static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9185 .init_caps = NFS_CAP_READDIRPLUS
9186 | NFS_CAP_ATOMIC_OPEN
9187 | NFS_CAP_POSIX_LOCK,
9188 .init_client = nfs40_init_client,
9189 .shutdown_client = nfs40_shutdown_client,
9190 .match_stateid = nfs4_match_stateid,
9191 .find_root_sec = nfs4_find_root_sec,
9192 .free_lock_state = nfs4_release_lockowner,
9193 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
9194 .alloc_seqid = nfs_alloc_seqid,
9195 .call_sync_ops = &nfs40_call_sync_ops,
9196 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9197 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9198 .state_renewal_ops = &nfs40_state_renewal_ops,
9199 .mig_recovery_ops = &nfs40_mig_recovery_ops,
9202 #if defined(CONFIG_NFS_V4_1)
9203 static struct nfs_seqid *
9204 nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9209 static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9211 .init_caps = NFS_CAP_READDIRPLUS
9212 | NFS_CAP_ATOMIC_OPEN
9213 | NFS_CAP_POSIX_LOCK
9214 | NFS_CAP_STATEID_NFSV41
9215 | NFS_CAP_ATOMIC_OPEN_V1,
9216 .init_client = nfs41_init_client,
9217 .shutdown_client = nfs41_shutdown_client,
9218 .match_stateid = nfs41_match_stateid,
9219 .find_root_sec = nfs41_find_root_sec,
9220 .free_lock_state = nfs41_free_lock_state,
9221 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9222 .alloc_seqid = nfs_alloc_no_seqid,
9223 .session_trunk = nfs4_test_session_trunk,
9224 .call_sync_ops = &nfs41_call_sync_ops,
9225 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9226 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9227 .state_renewal_ops = &nfs41_state_renewal_ops,
9228 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9232 #if defined(CONFIG_NFS_V4_2)
9233 static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9235 .init_caps = NFS_CAP_READDIRPLUS
9236 | NFS_CAP_ATOMIC_OPEN
9237 | NFS_CAP_POSIX_LOCK
9238 | NFS_CAP_STATEID_NFSV41
9239 | NFS_CAP_ATOMIC_OPEN_V1
9242 | NFS_CAP_DEALLOCATE
9244 | NFS_CAP_LAYOUTSTATS
9246 .init_client = nfs41_init_client,
9247 .shutdown_client = nfs41_shutdown_client,
9248 .match_stateid = nfs41_match_stateid,
9249 .find_root_sec = nfs41_find_root_sec,
9250 .free_lock_state = nfs41_free_lock_state,
9251 .call_sync_ops = &nfs41_call_sync_ops,
9252 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
9253 .alloc_seqid = nfs_alloc_no_seqid,
9254 .session_trunk = nfs4_test_session_trunk,
9255 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9256 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9257 .state_renewal_ops = &nfs41_state_renewal_ops,
9258 .mig_recovery_ops = &nfs41_mig_recovery_ops,
9262 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9263 [0] = &nfs_v4_0_minor_ops,
9264 #if defined(CONFIG_NFS_V4_1)
9265 [1] = &nfs_v4_1_minor_ops,
9267 #if defined(CONFIG_NFS_V4_2)
9268 [2] = &nfs_v4_2_minor_ops,
9272 static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
9274 ssize_t error, error2;
9276 error = generic_listxattr(dentry, list, size);
9284 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9287 return error + error2;
9290 static const struct inode_operations nfs4_dir_inode_operations = {
9291 .create = nfs_create,
9292 .lookup = nfs_lookup,
9293 .atomic_open = nfs_atomic_open,
9295 .unlink = nfs_unlink,
9296 .symlink = nfs_symlink,
9300 .rename = nfs_rename,
9301 .permission = nfs_permission,
9302 .getattr = nfs_getattr,
9303 .setattr = nfs_setattr,
9304 .listxattr = nfs4_listxattr,
9307 static const struct inode_operations nfs4_file_inode_operations = {
9308 .permission = nfs_permission,
9309 .getattr = nfs_getattr,
9310 .setattr = nfs_setattr,
9311 .listxattr = nfs4_listxattr,
9314 const struct nfs_rpc_ops nfs_v4_clientops = {
9315 .version = 4, /* protocol version */
9316 .dentry_ops = &nfs4_dentry_operations,
9317 .dir_inode_ops = &nfs4_dir_inode_operations,
9318 .file_inode_ops = &nfs4_file_inode_operations,
9319 .file_ops = &nfs4_file_operations,
9320 .getroot = nfs4_proc_get_root,
9321 .submount = nfs4_submount,
9322 .try_mount = nfs4_try_mount,
9323 .getattr = nfs4_proc_getattr,
9324 .setattr = nfs4_proc_setattr,
9325 .lookup = nfs4_proc_lookup,
9326 .access = nfs4_proc_access,
9327 .readlink = nfs4_proc_readlink,
9328 .create = nfs4_proc_create,
9329 .remove = nfs4_proc_remove,
9330 .unlink_setup = nfs4_proc_unlink_setup,
9331 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
9332 .unlink_done = nfs4_proc_unlink_done,
9333 .rename_setup = nfs4_proc_rename_setup,
9334 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
9335 .rename_done = nfs4_proc_rename_done,
9336 .link = nfs4_proc_link,
9337 .symlink = nfs4_proc_symlink,
9338 .mkdir = nfs4_proc_mkdir,
9339 .rmdir = nfs4_proc_remove,
9340 .readdir = nfs4_proc_readdir,
9341 .mknod = nfs4_proc_mknod,
9342 .statfs = nfs4_proc_statfs,
9343 .fsinfo = nfs4_proc_fsinfo,
9344 .pathconf = nfs4_proc_pathconf,
9345 .set_capabilities = nfs4_server_capabilities,
9346 .decode_dirent = nfs4_decode_dirent,
9347 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
9348 .read_setup = nfs4_proc_read_setup,
9349 .read_done = nfs4_read_done,
9350 .write_setup = nfs4_proc_write_setup,
9351 .write_done = nfs4_write_done,
9352 .commit_setup = nfs4_proc_commit_setup,
9353 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
9354 .commit_done = nfs4_commit_done,
9355 .lock = nfs4_proc_lock,
9356 .clear_acl_cache = nfs4_zap_acl_attr,
9357 .close_context = nfs4_close_context,
9358 .open_context = nfs4_atomic_open,
9359 .have_delegation = nfs4_have_delegation,
9360 .return_delegation = nfs4_inode_return_delegation,
9361 .alloc_client = nfs4_alloc_client,
9362 .init_client = nfs4_init_client,
9363 .free_client = nfs4_free_client,
9364 .create_server = nfs4_create_server,
9365 .clone_server = nfs_clone_server,
9368 static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
9369 .name = XATTR_NAME_NFSV4_ACL,
9370 .list = nfs4_xattr_list_nfs4_acl,
9371 .get = nfs4_xattr_get_nfs4_acl,
9372 .set = nfs4_xattr_set_nfs4_acl,
9375 const struct xattr_handler *nfs4_xattr_handlers[] = {
9376 &nfs4_xattr_nfs4_acl_handler,
9377 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
9378 &nfs4_xattr_nfs4_label_handler,