4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
53 #include "delegation.h"
57 #define NFSDBG_FACILITY NFSDBG_PROC
59 #define NFS4_POLL_RETRY_MIN (HZ/10)
60 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 static int _nfs4_proc_open(struct nfs4_opendata *data);
64 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
65 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
66 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
67 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69 /* Prevent leaks of NFSv4 errors into userland */
70 int nfs4_map_errors(int err)
73 dprintk("%s could not handle NFSv4 error %d\n",
81 * This is our standard bitmap for GETATTR requests.
83 const u32 nfs4_fattr_bitmap[2] = {
88 | FATTR4_WORD0_FILEID,
90 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
100 const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
109 const u32 nfs4_pathconf_bitmap[2] = {
111 | FATTR4_WORD0_MAXNAME,
115 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
122 const u32 nfs4_fs_locations_bitmap[2] = {
124 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS,
130 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
141 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
142 struct nfs4_readdir_arg *readdir)
146 BUG_ON(readdir->count < 80);
148 readdir->cookie = cookie;
149 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
154 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
165 start = p = kmap_atomic(*readdir->pages, KM_USER0);
168 *p++ = xdr_one; /* next */
169 *p++ = xdr_zero; /* cookie, first word */
170 *p++ = xdr_one; /* cookie, second word */
171 *p++ = xdr_one; /* entry len */
172 memcpy(p, ".\0\0\0", 4); /* entry */
174 *p++ = xdr_one; /* bitmap length */
175 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
176 *p++ = htonl(8); /* attribute buffer length */
177 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
180 *p++ = xdr_one; /* next */
181 *p++ = xdr_zero; /* cookie, first word */
182 *p++ = xdr_two; /* cookie, second word */
183 *p++ = xdr_two; /* entry len */
184 memcpy(p, "..\0\0", 4); /* entry */
186 *p++ = xdr_one; /* bitmap length */
187 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
188 *p++ = htonl(8); /* attribute buffer length */
189 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
191 readdir->pgbase = (char *)p - (char *)start;
192 readdir->count -= readdir->pgbase;
193 kunmap_atomic(start, KM_USER0);
196 static int nfs4_wait_bit_killable(void *word)
198 if (fatal_signal_pending(current))
204 static int nfs4_wait_clnt_recover(struct nfs_client *clp)
210 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
212 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
213 nfs4_wait_bit_killable, TASK_KILLABLE);
215 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
219 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
226 *timeout = NFS4_POLL_RETRY_MIN;
227 if (*timeout > NFS4_POLL_RETRY_MAX)
228 *timeout = NFS4_POLL_RETRY_MAX;
229 schedule_timeout_killable(*timeout);
230 if (fatal_signal_pending(current))
236 /* This is the error handling routine for processes that are allowed
239 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
241 struct nfs_client *clp = server->nfs_client;
244 exception->retry = 0;
248 case -NFS4ERR_STALE_CLIENTID:
249 case -NFS4ERR_STALE_STATEID:
250 case -NFS4ERR_EXPIRED:
251 nfs4_schedule_state_recovery(clp);
252 ret = nfs4_wait_clnt_recover(clp);
254 exception->retry = 1;
256 case -NFS4ERR_FILE_OPEN:
259 ret = nfs4_delay(server->client, &exception->timeout);
262 case -NFS4ERR_OLD_STATEID:
263 exception->retry = 1;
265 /* We failed to handle the error */
266 return nfs4_map_errors(ret);
270 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
272 struct nfs_client *clp = server->nfs_client;
273 spin_lock(&clp->cl_lock);
274 if (time_before(clp->cl_last_renewal,timestamp))
275 clp->cl_last_renewal = timestamp;
276 spin_unlock(&clp->cl_lock);
279 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
281 struct nfs_inode *nfsi = NFS_I(dir);
283 spin_lock(&dir->i_lock);
284 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
285 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
286 nfs_force_lookup_revalidate(dir);
287 nfsi->change_attr = cinfo->after;
288 spin_unlock(&dir->i_lock);
291 struct nfs4_opendata {
293 struct nfs_openargs o_arg;
294 struct nfs_openres o_res;
295 struct nfs_open_confirmargs c_arg;
296 struct nfs_open_confirmres c_res;
297 struct nfs_fattr f_attr;
298 struct nfs_fattr dir_attr;
301 struct nfs4_state_owner *owner;
302 struct nfs4_state *state;
304 unsigned long timestamp;
305 unsigned int rpc_done : 1;
311 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
313 p->o_res.f_attr = &p->f_attr;
314 p->o_res.dir_attr = &p->dir_attr;
315 p->o_res.seqid = p->o_arg.seqid;
316 p->c_res.seqid = p->c_arg.seqid;
317 p->o_res.server = p->o_arg.server;
318 nfs_fattr_init(&p->f_attr);
319 nfs_fattr_init(&p->dir_attr);
322 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
323 struct nfs4_state_owner *sp, int flags,
324 const struct iattr *attrs)
326 struct dentry *parent = dget_parent(path->dentry);
327 struct inode *dir = parent->d_inode;
328 struct nfs_server *server = NFS_SERVER(dir);
329 struct nfs4_opendata *p;
331 p = kzalloc(sizeof(*p), GFP_KERNEL);
334 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
335 if (p->o_arg.seqid == NULL)
337 p->path.mnt = mntget(path->mnt);
338 p->path.dentry = dget(path->dentry);
341 atomic_inc(&sp->so_count);
342 p->o_arg.fh = NFS_FH(dir);
343 p->o_arg.open_flags = flags,
344 p->o_arg.clientid = server->nfs_client->cl_clientid;
345 p->o_arg.id = sp->so_owner_id.id;
346 p->o_arg.name = &p->path.dentry->d_name;
347 p->o_arg.server = server;
348 p->o_arg.bitmask = server->attr_bitmask;
349 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
350 if (flags & O_EXCL) {
351 u32 *s = (u32 *) p->o_arg.u.verifier.data;
354 } else if (flags & O_CREAT) {
355 p->o_arg.u.attrs = &p->attrs;
356 memcpy(&p->attrs, attrs, sizeof(p->attrs));
358 p->c_arg.fh = &p->o_res.fh;
359 p->c_arg.stateid = &p->o_res.stateid;
360 p->c_arg.seqid = p->o_arg.seqid;
361 nfs4_init_opendata_res(p);
371 static void nfs4_opendata_free(struct kref *kref)
373 struct nfs4_opendata *p = container_of(kref,
374 struct nfs4_opendata, kref);
376 nfs_free_seqid(p->o_arg.seqid);
377 if (p->state != NULL)
378 nfs4_put_open_state(p->state);
379 nfs4_put_state_owner(p->owner);
385 static void nfs4_opendata_put(struct nfs4_opendata *p)
388 kref_put(&p->kref, nfs4_opendata_free);
391 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
395 ret = rpc_wait_for_completion_task(task);
399 static int can_open_cached(struct nfs4_state *state, int mode)
402 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
404 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
407 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
409 case FMODE_READ|FMODE_WRITE:
410 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
415 static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
417 if ((delegation->type & open_flags) != open_flags)
419 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
424 static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
426 switch (open_flags) {
433 case FMODE_READ|FMODE_WRITE:
436 nfs4_state_set_mode_locked(state, state->state | open_flags);
439 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
441 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
442 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
443 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
444 switch (open_flags) {
446 set_bit(NFS_O_RDONLY_STATE, &state->flags);
449 set_bit(NFS_O_WRONLY_STATE, &state->flags);
451 case FMODE_READ|FMODE_WRITE:
452 set_bit(NFS_O_RDWR_STATE, &state->flags);
456 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
458 write_seqlock(&state->seqlock);
459 nfs_set_open_stateid_locked(state, stateid, open_flags);
460 write_sequnlock(&state->seqlock);
463 static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, int open_flags)
466 * Protect the call to nfs4_state_set_mode_locked and
467 * serialise the stateid update
469 write_seqlock(&state->seqlock);
470 if (deleg_stateid != NULL) {
471 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
472 set_bit(NFS_DELEGATED_STATE, &state->flags);
474 if (open_stateid != NULL)
475 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
476 write_sequnlock(&state->seqlock);
477 spin_lock(&state->owner->so_lock);
478 update_open_stateflags(state, open_flags);
479 spin_unlock(&state->owner->so_lock);
482 static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, int open_flags)
484 struct nfs_inode *nfsi = NFS_I(state->inode);
485 struct nfs_delegation *deleg_cur;
488 open_flags &= (FMODE_READ|FMODE_WRITE);
491 deleg_cur = rcu_dereference(nfsi->delegation);
492 if (deleg_cur == NULL)
495 spin_lock(&deleg_cur->lock);
496 if (nfsi->delegation != deleg_cur ||
497 (deleg_cur->type & open_flags) != open_flags)
498 goto no_delegation_unlock;
500 if (delegation == NULL)
501 delegation = &deleg_cur->stateid;
502 else if (memcmp(deleg_cur->stateid.data, delegation->data, NFS4_STATEID_SIZE) != 0)
503 goto no_delegation_unlock;
505 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, open_flags);
507 no_delegation_unlock:
508 spin_unlock(&deleg_cur->lock);
512 if (!ret && open_stateid != NULL) {
513 __update_open_stateid(state, open_stateid, NULL, open_flags);
521 static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
523 struct nfs_delegation *delegation;
526 delegation = rcu_dereference(NFS_I(inode)->delegation);
527 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
532 nfs_inode_return_delegation(inode);
535 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
537 struct nfs4_state *state = opendata->state;
538 struct nfs_inode *nfsi = NFS_I(state->inode);
539 struct nfs_delegation *delegation;
540 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
541 nfs4_stateid stateid;
545 if (can_open_cached(state, open_mode)) {
546 spin_lock(&state->owner->so_lock);
547 if (can_open_cached(state, open_mode)) {
548 update_open_stateflags(state, open_mode);
549 spin_unlock(&state->owner->so_lock);
550 goto out_return_state;
552 spin_unlock(&state->owner->so_lock);
555 delegation = rcu_dereference(nfsi->delegation);
556 if (delegation == NULL ||
557 !can_open_delegated(delegation, open_mode)) {
561 /* Save the delegation */
562 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
564 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
569 /* Try to update the stateid using the delegation */
570 if (update_open_stateid(state, NULL, &stateid, open_mode))
571 goto out_return_state;
576 atomic_inc(&state->count);
580 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
583 struct nfs4_state *state = NULL;
584 struct nfs_delegation *delegation;
587 if (!data->rpc_done) {
588 state = nfs4_try_open_cached(data);
593 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
595 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
596 ret = PTR_ERR(inode);
600 state = nfs4_get_open_state(inode, data->owner);
603 if (data->o_res.delegation_type != 0) {
604 int delegation_flags = 0;
607 delegation = rcu_dereference(NFS_I(inode)->delegation);
609 delegation_flags = delegation->flags;
611 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
612 nfs_inode_set_delegation(state->inode,
613 data->owner->so_cred,
616 nfs_inode_reclaim_delegation(state->inode,
617 data->owner->so_cred,
621 update_open_stateid(state, &data->o_res.stateid, NULL,
622 data->o_arg.open_flags);
632 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
634 struct nfs_inode *nfsi = NFS_I(state->inode);
635 struct nfs_open_context *ctx;
637 spin_lock(&state->inode->i_lock);
638 list_for_each_entry(ctx, &nfsi->open_files, list) {
639 if (ctx->state != state)
641 get_nfs_open_context(ctx);
642 spin_unlock(&state->inode->i_lock);
645 spin_unlock(&state->inode->i_lock);
646 return ERR_PTR(-ENOENT);
649 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
651 struct nfs4_opendata *opendata;
653 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
654 if (opendata == NULL)
655 return ERR_PTR(-ENOMEM);
656 opendata->state = state;
657 atomic_inc(&state->count);
661 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
663 struct nfs4_state *newstate;
666 opendata->o_arg.open_flags = openflags;
667 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
668 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
669 nfs4_init_opendata_res(opendata);
670 ret = _nfs4_proc_open(opendata);
673 newstate = nfs4_opendata_to_nfs4_state(opendata);
674 if (IS_ERR(newstate))
675 return PTR_ERR(newstate);
676 nfs4_close_state(&opendata->path, newstate, openflags);
681 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
683 struct nfs4_state *newstate;
686 /* memory barrier prior to reading state->n_* */
687 clear_bit(NFS_DELEGATED_STATE, &state->flags);
689 if (state->n_rdwr != 0) {
690 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
693 if (newstate != state)
696 if (state->n_wronly != 0) {
697 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
700 if (newstate != state)
703 if (state->n_rdonly != 0) {
704 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
707 if (newstate != state)
711 * We may have performed cached opens for all three recoveries.
712 * Check if we need to update the current stateid.
714 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
715 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
716 write_seqlock(&state->seqlock);
717 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
718 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
719 write_sequnlock(&state->seqlock);
726 * reclaim state on the server after a reboot.
728 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
730 struct nfs_delegation *delegation;
731 struct nfs4_opendata *opendata;
732 int delegation_type = 0;
735 opendata = nfs4_open_recoverdata_alloc(ctx, state);
736 if (IS_ERR(opendata))
737 return PTR_ERR(opendata);
738 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
739 opendata->o_arg.fh = NFS_FH(state->inode);
741 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
742 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
743 delegation_type = delegation->type;
745 opendata->o_arg.u.delegation_type = delegation_type;
746 status = nfs4_open_recover(opendata, state);
747 nfs4_opendata_put(opendata);
751 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
753 struct nfs_server *server = NFS_SERVER(state->inode);
754 struct nfs4_exception exception = { };
757 err = _nfs4_do_open_reclaim(ctx, state);
758 if (err != -NFS4ERR_DELAY)
760 nfs4_handle_exception(server, err, &exception);
761 } while (exception.retry);
765 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
767 struct nfs_open_context *ctx;
770 ctx = nfs4_state_find_open_context(state);
773 ret = nfs4_do_open_reclaim(ctx, state);
774 put_nfs_open_context(ctx);
778 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
780 struct nfs4_opendata *opendata;
783 opendata = nfs4_open_recoverdata_alloc(ctx, state);
784 if (IS_ERR(opendata))
785 return PTR_ERR(opendata);
786 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
787 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
788 sizeof(opendata->o_arg.u.delegation.data));
789 ret = nfs4_open_recover(opendata, state);
790 nfs4_opendata_put(opendata);
794 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
796 struct nfs4_exception exception = { };
797 struct nfs_server *server = NFS_SERVER(state->inode);
800 err = _nfs4_open_delegation_recall(ctx, state, stateid);
804 case -NFS4ERR_STALE_CLIENTID:
805 case -NFS4ERR_STALE_STATEID:
806 case -NFS4ERR_EXPIRED:
807 /* Don't recall a delegation if it was lost */
808 nfs4_schedule_state_recovery(server->nfs_client);
811 err = nfs4_handle_exception(server, err, &exception);
812 } while (exception.retry);
816 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
818 struct nfs4_opendata *data = calldata;
820 data->rpc_status = task->tk_status;
821 if (RPC_ASSASSINATED(task))
823 if (data->rpc_status == 0) {
824 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
825 sizeof(data->o_res.stateid.data));
826 nfs_confirm_seqid(&data->owner->so_seqid, 0);
827 renew_lease(data->o_res.server, data->timestamp);
832 static void nfs4_open_confirm_release(void *calldata)
834 struct nfs4_opendata *data = calldata;
835 struct nfs4_state *state = NULL;
837 /* If this request hasn't been cancelled, do nothing */
838 if (data->cancelled == 0)
840 /* In case of error, no cleanup! */
843 state = nfs4_opendata_to_nfs4_state(data);
845 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
847 nfs4_opendata_put(data);
850 static const struct rpc_call_ops nfs4_open_confirm_ops = {
851 .rpc_call_done = nfs4_open_confirm_done,
852 .rpc_release = nfs4_open_confirm_release,
856 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
858 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
860 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
861 struct rpc_task *task;
862 struct rpc_message msg = {
863 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
864 .rpc_argp = &data->c_arg,
865 .rpc_resp = &data->c_res,
866 .rpc_cred = data->owner->so_cred,
868 struct rpc_task_setup task_setup_data = {
869 .rpc_client = server->client,
871 .callback_ops = &nfs4_open_confirm_ops,
872 .callback_data = data,
873 .workqueue = nfsiod_workqueue,
874 .flags = RPC_TASK_ASYNC,
878 kref_get(&data->kref);
880 data->rpc_status = 0;
881 data->timestamp = jiffies;
882 task = rpc_run_task(&task_setup_data);
884 return PTR_ERR(task);
885 status = nfs4_wait_for_completion_rpc_task(task);
890 status = data->rpc_status;
895 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
897 struct nfs4_opendata *data = calldata;
898 struct nfs4_state_owner *sp = data->owner;
900 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
903 * Check if we still need to send an OPEN call, or if we can use
904 * a delegation instead.
906 if (data->state != NULL) {
907 struct nfs_delegation *delegation;
909 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
912 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
913 if (delegation != NULL &&
914 test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) == 0) {
920 /* Update sequence id. */
921 data->o_arg.id = sp->so_owner_id.id;
922 data->o_arg.clientid = sp->so_client->cl_clientid;
923 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
924 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
925 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
927 data->timestamp = jiffies;
928 rpc_call_start(task);
931 task->tk_action = NULL;
935 static void nfs4_open_done(struct rpc_task *task, void *calldata)
937 struct nfs4_opendata *data = calldata;
939 data->rpc_status = task->tk_status;
940 if (RPC_ASSASSINATED(task))
942 if (task->tk_status == 0) {
943 switch (data->o_res.f_attr->mode & S_IFMT) {
947 data->rpc_status = -ELOOP;
950 data->rpc_status = -EISDIR;
953 data->rpc_status = -ENOTDIR;
955 renew_lease(data->o_res.server, data->timestamp);
956 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
957 nfs_confirm_seqid(&data->owner->so_seqid, 0);
962 static void nfs4_open_release(void *calldata)
964 struct nfs4_opendata *data = calldata;
965 struct nfs4_state *state = NULL;
967 /* If this request hasn't been cancelled, do nothing */
968 if (data->cancelled == 0)
970 /* In case of error, no cleanup! */
971 if (data->rpc_status != 0 || !data->rpc_done)
973 /* In case we need an open_confirm, no cleanup! */
974 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
976 state = nfs4_opendata_to_nfs4_state(data);
978 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
980 nfs4_opendata_put(data);
983 static const struct rpc_call_ops nfs4_open_ops = {
984 .rpc_call_prepare = nfs4_open_prepare,
985 .rpc_call_done = nfs4_open_done,
986 .rpc_release = nfs4_open_release,
990 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
992 static int _nfs4_proc_open(struct nfs4_opendata *data)
994 struct inode *dir = data->dir->d_inode;
995 struct nfs_server *server = NFS_SERVER(dir);
996 struct nfs_openargs *o_arg = &data->o_arg;
997 struct nfs_openres *o_res = &data->o_res;
998 struct rpc_task *task;
999 struct rpc_message msg = {
1000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1003 .rpc_cred = data->owner->so_cred,
1005 struct rpc_task_setup task_setup_data = {
1006 .rpc_client = server->client,
1007 .rpc_message = &msg,
1008 .callback_ops = &nfs4_open_ops,
1009 .callback_data = data,
1010 .workqueue = nfsiod_workqueue,
1011 .flags = RPC_TASK_ASYNC,
1015 kref_get(&data->kref);
1017 data->rpc_status = 0;
1018 data->cancelled = 0;
1019 task = rpc_run_task(&task_setup_data);
1021 return PTR_ERR(task);
1022 status = nfs4_wait_for_completion_rpc_task(task);
1024 data->cancelled = 1;
1027 status = data->rpc_status;
1029 if (status != 0 || !data->rpc_done)
1032 if (o_res->fh.size == 0)
1033 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
1035 if (o_arg->open_flags & O_CREAT) {
1036 update_changeattr(dir, &o_res->cinfo);
1037 nfs_post_op_update_inode(dir, o_res->dir_attr);
1039 nfs_refresh_inode(dir, o_res->dir_attr);
1040 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1041 status = _nfs4_proc_open_confirm(data);
1045 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1046 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
1050 static int nfs4_recover_expired_lease(struct nfs_server *server)
1052 struct nfs_client *clp = server->nfs_client;
1056 ret = nfs4_wait_clnt_recover(clp);
1059 if (!test_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state) &&
1060 !test_bit(NFS4CLNT_CHECK_LEASE,&clp->cl_state))
1062 nfs4_schedule_state_recovery(clp);
1069 * reclaim state on the server after a network partition.
1070 * Assumes caller holds the appropriate lock
1072 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1074 struct nfs4_opendata *opendata;
1077 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1078 if (IS_ERR(opendata))
1079 return PTR_ERR(opendata);
1080 ret = nfs4_open_recover(opendata, state);
1082 d_drop(ctx->path.dentry);
1083 nfs4_opendata_put(opendata);
1087 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1089 struct nfs_server *server = NFS_SERVER(state->inode);
1090 struct nfs4_exception exception = { };
1094 err = _nfs4_open_expired(ctx, state);
1095 if (err == -NFS4ERR_DELAY)
1096 nfs4_handle_exception(server, err, &exception);
1097 } while (exception.retry);
1101 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1103 struct nfs_open_context *ctx;
1106 ctx = nfs4_state_find_open_context(state);
1108 return PTR_ERR(ctx);
1109 ret = nfs4_do_open_expired(ctx, state);
1110 put_nfs_open_context(ctx);
1115 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1116 * fields corresponding to attributes that were used to store the verifier.
1117 * Make sure we clobber those fields in the later setattr call
1119 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1121 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1122 !(sattr->ia_valid & ATTR_ATIME_SET))
1123 sattr->ia_valid |= ATTR_ATIME;
1125 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1126 !(sattr->ia_valid & ATTR_MTIME_SET))
1127 sattr->ia_valid |= ATTR_MTIME;
1131 * Returns a referenced nfs4_state
1133 static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1135 struct nfs4_state_owner *sp;
1136 struct nfs4_state *state = NULL;
1137 struct nfs_server *server = NFS_SERVER(dir);
1138 struct nfs_client *clp = server->nfs_client;
1139 struct nfs4_opendata *opendata;
1142 /* Protect against reboot recovery conflicts */
1144 if (!(sp = nfs4_get_state_owner(server, cred))) {
1145 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1148 status = nfs4_recover_expired_lease(server);
1150 goto err_put_state_owner;
1151 if (path->dentry->d_inode != NULL)
1152 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
1153 down_read(&clp->cl_sem);
1155 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
1156 if (opendata == NULL)
1157 goto err_release_rwsem;
1159 if (path->dentry->d_inode != NULL)
1160 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1162 status = _nfs4_proc_open(opendata);
1164 goto err_opendata_put;
1166 if (opendata->o_arg.open_flags & O_EXCL)
1167 nfs4_exclusive_attrset(opendata, sattr);
1169 state = nfs4_opendata_to_nfs4_state(opendata);
1170 status = PTR_ERR(state);
1172 goto err_opendata_put;
1173 nfs4_opendata_put(opendata);
1174 nfs4_put_state_owner(sp);
1175 up_read(&clp->cl_sem);
1179 nfs4_opendata_put(opendata);
1181 up_read(&clp->cl_sem);
1182 err_put_state_owner:
1183 nfs4_put_state_owner(sp);
1190 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1192 struct nfs4_exception exception = { };
1193 struct nfs4_state *res;
1197 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1200 /* NOTE: BAD_SEQID means the server and client disagree about the
1201 * book-keeping w.r.t. state-changing operations
1202 * (OPEN/CLOSE/LOCK/LOCKU...)
1203 * It is actually a sign of a bug on the client or on the server.
1205 * If we receive a BAD_SEQID error in the particular case of
1206 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1207 * have unhashed the old state_owner for us, and that we can
1208 * therefore safely retry using a new one. We should still warn
1209 * the user though...
1211 if (status == -NFS4ERR_BAD_SEQID) {
1212 printk(KERN_WARNING "NFS: v4 server %s "
1213 " returned a bad sequence-id error!\n",
1214 NFS_SERVER(dir)->nfs_client->cl_hostname);
1215 exception.retry = 1;
1219 * BAD_STATEID on OPEN means that the server cancelled our
1220 * state before it received the OPEN_CONFIRM.
1221 * Recover by retrying the request as per the discussion
1222 * on Page 181 of RFC3530.
1224 if (status == -NFS4ERR_BAD_STATEID) {
1225 exception.retry = 1;
1228 if (status == -EAGAIN) {
1229 /* We must have found a delegation */
1230 exception.retry = 1;
1233 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1234 status, &exception));
1235 } while (exception.retry);
1239 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1240 struct nfs_fattr *fattr, struct iattr *sattr,
1241 struct nfs4_state *state)
1243 struct nfs_server *server = NFS_SERVER(inode);
1244 struct nfs_setattrargs arg = {
1245 .fh = NFS_FH(inode),
1248 .bitmask = server->attr_bitmask,
1250 struct nfs_setattrres res = {
1254 struct rpc_message msg = {
1255 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1260 unsigned long timestamp = jiffies;
1263 nfs_fattr_init(fattr);
1265 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1266 /* Use that stateid */
1267 } else if (state != NULL) {
1268 nfs4_copy_stateid(&arg.stateid, state, current->files);
1270 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1272 status = rpc_call_sync(server->client, &msg, 0);
1273 if (status == 0 && state != NULL)
1274 renew_lease(server, timestamp);
1278 static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1279 struct nfs_fattr *fattr, struct iattr *sattr,
1280 struct nfs4_state *state)
1282 struct nfs_server *server = NFS_SERVER(inode);
1283 struct nfs4_exception exception = { };
1286 err = nfs4_handle_exception(server,
1287 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1289 } while (exception.retry);
1293 struct nfs4_closedata {
1295 struct inode *inode;
1296 struct nfs4_state *state;
1297 struct nfs_closeargs arg;
1298 struct nfs_closeres res;
1299 struct nfs_fattr fattr;
1300 unsigned long timestamp;
1303 static void nfs4_free_closedata(void *data)
1305 struct nfs4_closedata *calldata = data;
1306 struct nfs4_state_owner *sp = calldata->state->owner;
1308 nfs4_put_open_state(calldata->state);
1309 nfs_free_seqid(calldata->arg.seqid);
1310 nfs4_put_state_owner(sp);
1311 path_put(&calldata->path);
1315 static void nfs4_close_done(struct rpc_task *task, void *data)
1317 struct nfs4_closedata *calldata = data;
1318 struct nfs4_state *state = calldata->state;
1319 struct nfs_server *server = NFS_SERVER(calldata->inode);
1321 if (RPC_ASSASSINATED(task))
1323 /* hmm. we are done with the inode, and in the process of freeing
1324 * the state_owner. we keep this around to process errors
1326 switch (task->tk_status) {
1328 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1329 renew_lease(server, calldata->timestamp);
1331 case -NFS4ERR_STALE_STATEID:
1332 case -NFS4ERR_EXPIRED:
1335 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1336 rpc_restart_call(task);
1340 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1343 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1345 struct nfs4_closedata *calldata = data;
1346 struct nfs4_state *state = calldata->state;
1347 int clear_rd, clear_wr, clear_rdwr;
1349 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1352 clear_rd = clear_wr = clear_rdwr = 0;
1353 spin_lock(&state->owner->so_lock);
1354 /* Calculate the change in open mode */
1355 if (state->n_rdwr == 0) {
1356 if (state->n_rdonly == 0) {
1357 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1358 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1360 if (state->n_wronly == 0) {
1361 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1362 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1365 spin_unlock(&state->owner->so_lock);
1366 if (!clear_rd && !clear_wr && !clear_rdwr) {
1367 /* Note: exit _without_ calling nfs4_close_done */
1368 task->tk_action = NULL;
1371 nfs_fattr_init(calldata->res.fattr);
1372 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1373 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1374 calldata->arg.open_flags = FMODE_READ;
1375 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1376 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1377 calldata->arg.open_flags = FMODE_WRITE;
1379 calldata->timestamp = jiffies;
1380 rpc_call_start(task);
1383 static const struct rpc_call_ops nfs4_close_ops = {
1384 .rpc_call_prepare = nfs4_close_prepare,
1385 .rpc_call_done = nfs4_close_done,
1386 .rpc_release = nfs4_free_closedata,
1390 * It is possible for data to be read/written from a mem-mapped file
1391 * after the sys_close call (which hits the vfs layer as a flush).
1392 * This means that we can't safely call nfsv4 close on a file until
1393 * the inode is cleared. This in turn means that we are not good
1394 * NFSv4 citizens - we do not indicate to the server to update the file's
1395 * share state even when we are done with one of the three share
1396 * stateid's in the inode.
1398 * NOTE: Caller must be holding the sp->so_owner semaphore!
1400 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1402 struct nfs_server *server = NFS_SERVER(state->inode);
1403 struct nfs4_closedata *calldata;
1404 struct nfs4_state_owner *sp = state->owner;
1405 struct rpc_task *task;
1406 struct rpc_message msg = {
1407 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1408 .rpc_cred = state->owner->so_cred,
1410 struct rpc_task_setup task_setup_data = {
1411 .rpc_client = server->client,
1412 .rpc_message = &msg,
1413 .callback_ops = &nfs4_close_ops,
1414 .workqueue = nfsiod_workqueue,
1415 .flags = RPC_TASK_ASYNC,
1417 int status = -ENOMEM;
1419 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1420 if (calldata == NULL)
1422 calldata->inode = state->inode;
1423 calldata->state = state;
1424 calldata->arg.fh = NFS_FH(state->inode);
1425 calldata->arg.stateid = &state->open_stateid;
1426 /* Serialization for the sequence id */
1427 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1428 if (calldata->arg.seqid == NULL)
1429 goto out_free_calldata;
1430 calldata->arg.bitmask = server->attr_bitmask;
1431 calldata->res.fattr = &calldata->fattr;
1432 calldata->res.seqid = calldata->arg.seqid;
1433 calldata->res.server = server;
1434 calldata->path.mnt = mntget(path->mnt);
1435 calldata->path.dentry = dget(path->dentry);
1437 msg.rpc_argp = &calldata->arg,
1438 msg.rpc_resp = &calldata->res,
1439 task_setup_data.callback_data = calldata;
1440 task = rpc_run_task(&task_setup_data);
1442 return PTR_ERR(task);
1445 status = rpc_wait_for_completion_task(task);
1451 nfs4_put_open_state(state);
1452 nfs4_put_state_owner(sp);
1456 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
1461 /* If the open_intent is for execute, we have an extra check to make */
1462 if (nd->intent.open.flags & FMODE_EXEC) {
1463 ret = nfs_may_open(state->inode,
1464 state->owner->so_cred,
1465 nd->intent.open.flags);
1469 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1470 if (!IS_ERR(filp)) {
1471 struct nfs_open_context *ctx;
1472 ctx = nfs_file_open_context(filp);
1476 ret = PTR_ERR(filp);
1478 nfs4_close_sync(path, state, nd->intent.open.flags);
1483 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1485 struct path path = {
1486 .mnt = nd->path.mnt,
1489 struct dentry *parent;
1491 struct rpc_cred *cred;
1492 struct nfs4_state *state;
1495 if (nd->flags & LOOKUP_CREATE) {
1496 attr.ia_mode = nd->intent.open.create_mode;
1497 attr.ia_valid = ATTR_MODE;
1498 if (!IS_POSIXACL(dir))
1499 attr.ia_mode &= ~current->fs->umask;
1502 BUG_ON(nd->intent.open.flags & O_CREAT);
1505 cred = rpc_lookup_cred();
1507 return (struct dentry *)cred;
1508 parent = dentry->d_parent;
1509 /* Protect against concurrent sillydeletes */
1510 nfs_block_sillyrename(parent);
1511 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1513 if (IS_ERR(state)) {
1514 if (PTR_ERR(state) == -ENOENT) {
1515 d_add(dentry, NULL);
1516 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1518 nfs_unblock_sillyrename(parent);
1519 return (struct dentry *)state;
1521 res = d_add_unique(dentry, igrab(state->inode));
1524 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1525 nfs_unblock_sillyrename(parent);
1526 nfs4_intent_set_file(nd, &path, state);
1531 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1533 struct path path = {
1534 .mnt = nd->path.mnt,
1537 struct rpc_cred *cred;
1538 struct nfs4_state *state;
1540 cred = rpc_lookup_cred();
1542 return PTR_ERR(cred);
1543 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1545 if (IS_ERR(state)) {
1546 switch (PTR_ERR(state)) {
1552 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1558 if (state->inode == dentry->d_inode) {
1559 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1560 nfs4_intent_set_file(nd, &path, state);
1563 nfs4_close_sync(&path, state, openflags);
1570 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1572 struct nfs4_server_caps_res res = {};
1573 struct rpc_message msg = {
1574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1575 .rpc_argp = fhandle,
1580 status = rpc_call_sync(server->client, &msg, 0);
1582 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1583 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1584 server->caps |= NFS_CAP_ACLS;
1585 if (res.has_links != 0)
1586 server->caps |= NFS_CAP_HARDLINKS;
1587 if (res.has_symlinks != 0)
1588 server->caps |= NFS_CAP_SYMLINKS;
1589 server->acl_bitmask = res.acl_bitmask;
1594 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1596 struct nfs4_exception exception = { };
1599 err = nfs4_handle_exception(server,
1600 _nfs4_server_capabilities(server, fhandle),
1602 } while (exception.retry);
1606 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1607 struct nfs_fsinfo *info)
1609 struct nfs4_lookup_root_arg args = {
1610 .bitmask = nfs4_fattr_bitmap,
1612 struct nfs4_lookup_res res = {
1614 .fattr = info->fattr,
1617 struct rpc_message msg = {
1618 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1622 nfs_fattr_init(info->fattr);
1623 return rpc_call_sync(server->client, &msg, 0);
1626 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1627 struct nfs_fsinfo *info)
1629 struct nfs4_exception exception = { };
1632 err = nfs4_handle_exception(server,
1633 _nfs4_lookup_root(server, fhandle, info),
1635 } while (exception.retry);
1640 * get the file handle for the "/" directory on the server
1642 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1643 struct nfs_fsinfo *info)
1647 status = nfs4_lookup_root(server, fhandle, info);
1649 status = nfs4_server_capabilities(server, fhandle);
1651 status = nfs4_do_fsinfo(server, fhandle, info);
1652 return nfs4_map_errors(status);
1656 * Get locations and (maybe) other attributes of a referral.
1657 * Note that we'll actually follow the referral later when
1658 * we detect fsid mismatch in inode revalidation
1660 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1662 int status = -ENOMEM;
1663 struct page *page = NULL;
1664 struct nfs4_fs_locations *locations = NULL;
1666 page = alloc_page(GFP_KERNEL);
1669 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1670 if (locations == NULL)
1673 status = nfs4_proc_fs_locations(dir, name, locations, page);
1676 /* Make sure server returned a different fsid for the referral */
1677 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1678 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
1683 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1684 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1686 fattr->mode = S_IFDIR;
1687 memset(fhandle, 0, sizeof(struct nfs_fh));
1696 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1698 struct nfs4_getattr_arg args = {
1700 .bitmask = server->attr_bitmask,
1702 struct nfs4_getattr_res res = {
1706 struct rpc_message msg = {
1707 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1712 nfs_fattr_init(fattr);
1713 return rpc_call_sync(server->client, &msg, 0);
1716 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1718 struct nfs4_exception exception = { };
1721 err = nfs4_handle_exception(server,
1722 _nfs4_proc_getattr(server, fhandle, fattr),
1724 } while (exception.retry);
1729 * The file is not closed if it is opened due to the a request to change
1730 * the size of the file. The open call will not be needed once the
1731 * VFS layer lookup-intents are implemented.
1733 * Close is called when the inode is destroyed.
1734 * If we haven't opened the file for O_WRONLY, we
1735 * need to in the size_change case to obtain a stateid.
1738 * Because OPEN is always done by name in nfsv4, it is
1739 * possible that we opened a different file by the same
1740 * name. We can recognize this race condition, but we
1741 * can't do anything about it besides returning an error.
1743 * This will be fixed with VFS changes (lookup-intent).
1746 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1747 struct iattr *sattr)
1749 struct inode *inode = dentry->d_inode;
1750 struct rpc_cred *cred = NULL;
1751 struct nfs4_state *state = NULL;
1754 nfs_fattr_init(fattr);
1756 /* Search for an existing open(O_WRITE) file */
1757 if (sattr->ia_valid & ATTR_FILE) {
1758 struct nfs_open_context *ctx;
1760 ctx = nfs_file_open_context(sattr->ia_file);
1767 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
1769 nfs_setattr_update_inode(inode, sattr);
1773 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1774 const struct qstr *name, struct nfs_fh *fhandle,
1775 struct nfs_fattr *fattr)
1778 struct nfs4_lookup_arg args = {
1779 .bitmask = server->attr_bitmask,
1783 struct nfs4_lookup_res res = {
1788 struct rpc_message msg = {
1789 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1794 nfs_fattr_init(fattr);
1796 dprintk("NFS call lookupfh %s\n", name->name);
1797 status = rpc_call_sync(server->client, &msg, 0);
1798 dprintk("NFS reply lookupfh: %d\n", status);
1802 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1803 struct qstr *name, struct nfs_fh *fhandle,
1804 struct nfs_fattr *fattr)
1806 struct nfs4_exception exception = { };
1809 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1811 if (err == -NFS4ERR_MOVED) {
1815 err = nfs4_handle_exception(server, err, &exception);
1816 } while (exception.retry);
1820 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1821 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1825 dprintk("NFS call lookup %s\n", name->name);
1826 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
1827 if (status == -NFS4ERR_MOVED)
1828 status = nfs4_get_referral(dir, name, fattr, fhandle);
1829 dprintk("NFS reply lookup: %d\n", status);
1833 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1835 struct nfs4_exception exception = { };
1838 err = nfs4_handle_exception(NFS_SERVER(dir),
1839 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1841 } while (exception.retry);
1845 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1847 struct nfs_server *server = NFS_SERVER(inode);
1848 struct nfs_fattr fattr;
1849 struct nfs4_accessargs args = {
1850 .fh = NFS_FH(inode),
1851 .bitmask = server->attr_bitmask,
1853 struct nfs4_accessres res = {
1857 struct rpc_message msg = {
1858 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1861 .rpc_cred = entry->cred,
1863 int mode = entry->mask;
1867 * Determine which access bits we want to ask for...
1869 if (mode & MAY_READ)
1870 args.access |= NFS4_ACCESS_READ;
1871 if (S_ISDIR(inode->i_mode)) {
1872 if (mode & MAY_WRITE)
1873 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1874 if (mode & MAY_EXEC)
1875 args.access |= NFS4_ACCESS_LOOKUP;
1877 if (mode & MAY_WRITE)
1878 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1879 if (mode & MAY_EXEC)
1880 args.access |= NFS4_ACCESS_EXECUTE;
1882 nfs_fattr_init(&fattr);
1883 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1886 if (res.access & NFS4_ACCESS_READ)
1887 entry->mask |= MAY_READ;
1888 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1889 entry->mask |= MAY_WRITE;
1890 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1891 entry->mask |= MAY_EXEC;
1892 nfs_refresh_inode(inode, &fattr);
1897 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1899 struct nfs4_exception exception = { };
1902 err = nfs4_handle_exception(NFS_SERVER(inode),
1903 _nfs4_proc_access(inode, entry),
1905 } while (exception.retry);
1910 * TODO: For the time being, we don't try to get any attributes
1911 * along with any of the zero-copy operations READ, READDIR,
1914 * In the case of the first three, we want to put the GETATTR
1915 * after the read-type operation -- this is because it is hard
1916 * to predict the length of a GETATTR response in v4, and thus
1917 * align the READ data correctly. This means that the GETATTR
1918 * may end up partially falling into the page cache, and we should
1919 * shift it into the 'tail' of the xdr_buf before processing.
1920 * To do this efficiently, we need to know the total length
1921 * of data received, which doesn't seem to be available outside
1924 * In the case of WRITE, we also want to put the GETATTR after
1925 * the operation -- in this case because we want to make sure
1926 * we get the post-operation mtime and size. This means that
1927 * we can't use xdr_encode_pages() as written: we need a variant
1928 * of it which would leave room in the 'tail' iovec.
1930 * Both of these changes to the XDR layer would in fact be quite
1931 * minor, but I decided to leave them for a subsequent patch.
1933 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1934 unsigned int pgbase, unsigned int pglen)
1936 struct nfs4_readlink args = {
1937 .fh = NFS_FH(inode),
1942 struct rpc_message msg = {
1943 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1948 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1951 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1952 unsigned int pgbase, unsigned int pglen)
1954 struct nfs4_exception exception = { };
1957 err = nfs4_handle_exception(NFS_SERVER(inode),
1958 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1960 } while (exception.retry);
1966 * We will need to arrange for the VFS layer to provide an atomic open.
1967 * Until then, this create/open method is prone to inefficiency and race
1968 * conditions due to the lookup, create, and open VFS calls from sys_open()
1969 * placed on the wire.
1971 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1972 * The file will be opened again in the subsequent VFS open call
1973 * (nfs4_proc_file_open).
1975 * The open for read will just hang around to be used by any process that
1976 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1980 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1981 int flags, struct nameidata *nd)
1983 struct path path = {
1984 .mnt = nd->path.mnt,
1987 struct nfs4_state *state;
1988 struct rpc_cred *cred;
1991 cred = rpc_lookup_cred();
1993 status = PTR_ERR(cred);
1996 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1998 if (IS_ERR(state)) {
1999 status = PTR_ERR(state);
2002 d_add(dentry, igrab(state->inode));
2003 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
2004 if (flags & O_EXCL) {
2005 struct nfs_fattr fattr;
2006 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
2008 nfs_setattr_update_inode(state->inode, sattr);
2009 nfs_post_op_update_inode(state->inode, &fattr);
2011 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
2012 status = nfs4_intent_set_file(nd, &path, state);
2014 nfs4_close_sync(&path, state, flags);
2021 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2023 struct nfs_server *server = NFS_SERVER(dir);
2024 struct nfs_removeargs args = {
2026 .name.len = name->len,
2027 .name.name = name->name,
2028 .bitmask = server->attr_bitmask,
2030 struct nfs_removeres res = {
2033 struct rpc_message msg = {
2034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2040 nfs_fattr_init(&res.dir_attr);
2041 status = rpc_call_sync(server->client, &msg, 0);
2043 update_changeattr(dir, &res.cinfo);
2044 nfs_post_op_update_inode(dir, &res.dir_attr);
2049 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2051 struct nfs4_exception exception = { };
2054 err = nfs4_handle_exception(NFS_SERVER(dir),
2055 _nfs4_proc_remove(dir, name),
2057 } while (exception.retry);
2061 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
2063 struct nfs_server *server = NFS_SERVER(dir);
2064 struct nfs_removeargs *args = msg->rpc_argp;
2065 struct nfs_removeres *res = msg->rpc_resp;
2067 args->bitmask = server->attr_bitmask;
2068 res->server = server;
2069 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
2072 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
2074 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2076 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
2078 update_changeattr(dir, &res->cinfo);
2079 nfs_post_op_update_inode(dir, &res->dir_attr);
2083 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2084 struct inode *new_dir, struct qstr *new_name)
2086 struct nfs_server *server = NFS_SERVER(old_dir);
2087 struct nfs4_rename_arg arg = {
2088 .old_dir = NFS_FH(old_dir),
2089 .new_dir = NFS_FH(new_dir),
2090 .old_name = old_name,
2091 .new_name = new_name,
2092 .bitmask = server->attr_bitmask,
2094 struct nfs_fattr old_fattr, new_fattr;
2095 struct nfs4_rename_res res = {
2097 .old_fattr = &old_fattr,
2098 .new_fattr = &new_fattr,
2100 struct rpc_message msg = {
2101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2107 nfs_fattr_init(res.old_fattr);
2108 nfs_fattr_init(res.new_fattr);
2109 status = rpc_call_sync(server->client, &msg, 0);
2112 update_changeattr(old_dir, &res.old_cinfo);
2113 nfs_post_op_update_inode(old_dir, res.old_fattr);
2114 update_changeattr(new_dir, &res.new_cinfo);
2115 nfs_post_op_update_inode(new_dir, res.new_fattr);
2120 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2121 struct inode *new_dir, struct qstr *new_name)
2123 struct nfs4_exception exception = { };
2126 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2127 _nfs4_proc_rename(old_dir, old_name,
2130 } while (exception.retry);
2134 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2136 struct nfs_server *server = NFS_SERVER(inode);
2137 struct nfs4_link_arg arg = {
2138 .fh = NFS_FH(inode),
2139 .dir_fh = NFS_FH(dir),
2141 .bitmask = server->attr_bitmask,
2143 struct nfs_fattr fattr, dir_attr;
2144 struct nfs4_link_res res = {
2147 .dir_attr = &dir_attr,
2149 struct rpc_message msg = {
2150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2156 nfs_fattr_init(res.fattr);
2157 nfs_fattr_init(res.dir_attr);
2158 status = rpc_call_sync(server->client, &msg, 0);
2160 update_changeattr(dir, &res.cinfo);
2161 nfs_post_op_update_inode(dir, res.dir_attr);
2162 nfs_post_op_update_inode(inode, res.fattr);
2168 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2170 struct nfs4_exception exception = { };
2173 err = nfs4_handle_exception(NFS_SERVER(inode),
2174 _nfs4_proc_link(inode, dir, name),
2176 } while (exception.retry);
2180 struct nfs4_createdata {
2181 struct rpc_message msg;
2182 struct nfs4_create_arg arg;
2183 struct nfs4_create_res res;
2185 struct nfs_fattr fattr;
2186 struct nfs_fattr dir_fattr;
2189 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2190 struct qstr *name, struct iattr *sattr, u32 ftype)
2192 struct nfs4_createdata *data;
2194 data = kzalloc(sizeof(*data), GFP_KERNEL);
2196 struct nfs_server *server = NFS_SERVER(dir);
2198 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2199 data->msg.rpc_argp = &data->arg;
2200 data->msg.rpc_resp = &data->res;
2201 data->arg.dir_fh = NFS_FH(dir);
2202 data->arg.server = server;
2203 data->arg.name = name;
2204 data->arg.attrs = sattr;
2205 data->arg.ftype = ftype;
2206 data->arg.bitmask = server->attr_bitmask;
2207 data->res.server = server;
2208 data->res.fh = &data->fh;
2209 data->res.fattr = &data->fattr;
2210 data->res.dir_fattr = &data->dir_fattr;
2211 nfs_fattr_init(data->res.fattr);
2212 nfs_fattr_init(data->res.dir_fattr);
2217 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2219 int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
2221 update_changeattr(dir, &data->res.dir_cinfo);
2222 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2223 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2228 static void nfs4_free_createdata(struct nfs4_createdata *data)
2233 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2234 struct page *page, unsigned int len, struct iattr *sattr)
2236 struct nfs4_createdata *data;
2237 int status = -ENAMETOOLONG;
2239 if (len > NFS4_MAXPATHLEN)
2243 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2247 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2248 data->arg.u.symlink.pages = &page;
2249 data->arg.u.symlink.len = len;
2251 status = nfs4_do_create(dir, dentry, data);
2253 nfs4_free_createdata(data);
2258 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2259 struct page *page, unsigned int len, struct iattr *sattr)
2261 struct nfs4_exception exception = { };
2264 err = nfs4_handle_exception(NFS_SERVER(dir),
2265 _nfs4_proc_symlink(dir, dentry, page,
2268 } while (exception.retry);
2272 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2273 struct iattr *sattr)
2275 struct nfs4_createdata *data;
2276 int status = -ENOMEM;
2278 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2282 status = nfs4_do_create(dir, dentry, data);
2284 nfs4_free_createdata(data);
2289 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2290 struct iattr *sattr)
2292 struct nfs4_exception exception = { };
2295 err = nfs4_handle_exception(NFS_SERVER(dir),
2296 _nfs4_proc_mkdir(dir, dentry, sattr),
2298 } while (exception.retry);
2302 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2303 u64 cookie, struct page *page, unsigned int count, int plus)
2305 struct inode *dir = dentry->d_inode;
2306 struct nfs4_readdir_arg args = {
2311 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2313 struct nfs4_readdir_res res;
2314 struct rpc_message msg = {
2315 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2322 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2323 dentry->d_parent->d_name.name,
2324 dentry->d_name.name,
2325 (unsigned long long)cookie);
2326 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2327 res.pgbase = args.pgbase;
2328 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2330 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2332 nfs_invalidate_atime(dir);
2334 dprintk("%s: returns %d\n", __func__, status);
2338 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2339 u64 cookie, struct page *page, unsigned int count, int plus)
2341 struct nfs4_exception exception = { };
2344 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2345 _nfs4_proc_readdir(dentry, cred, cookie,
2348 } while (exception.retry);
2352 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2353 struct iattr *sattr, dev_t rdev)
2355 struct nfs4_createdata *data;
2356 int mode = sattr->ia_mode;
2357 int status = -ENOMEM;
2359 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2360 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2362 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2367 data->arg.ftype = NF4FIFO;
2368 else if (S_ISBLK(mode)) {
2369 data->arg.ftype = NF4BLK;
2370 data->arg.u.device.specdata1 = MAJOR(rdev);
2371 data->arg.u.device.specdata2 = MINOR(rdev);
2373 else if (S_ISCHR(mode)) {
2374 data->arg.ftype = NF4CHR;
2375 data->arg.u.device.specdata1 = MAJOR(rdev);
2376 data->arg.u.device.specdata2 = MINOR(rdev);
2379 status = nfs4_do_create(dir, dentry, data);
2381 nfs4_free_createdata(data);
2386 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2387 struct iattr *sattr, dev_t rdev)
2389 struct nfs4_exception exception = { };
2392 err = nfs4_handle_exception(NFS_SERVER(dir),
2393 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2395 } while (exception.retry);
2399 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2400 struct nfs_fsstat *fsstat)
2402 struct nfs4_statfs_arg args = {
2404 .bitmask = server->attr_bitmask,
2406 struct rpc_message msg = {
2407 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2412 nfs_fattr_init(fsstat->fattr);
2413 return rpc_call_sync(server->client, &msg, 0);
2416 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2418 struct nfs4_exception exception = { };
2421 err = nfs4_handle_exception(server,
2422 _nfs4_proc_statfs(server, fhandle, fsstat),
2424 } while (exception.retry);
2428 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2429 struct nfs_fsinfo *fsinfo)
2431 struct nfs4_fsinfo_arg args = {
2433 .bitmask = server->attr_bitmask,
2435 struct rpc_message msg = {
2436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2441 return rpc_call_sync(server->client, &msg, 0);
2444 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2446 struct nfs4_exception exception = { };
2450 err = nfs4_handle_exception(server,
2451 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2453 } while (exception.retry);
2457 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2459 nfs_fattr_init(fsinfo->fattr);
2460 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2463 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2464 struct nfs_pathconf *pathconf)
2466 struct nfs4_pathconf_arg args = {
2468 .bitmask = server->attr_bitmask,
2470 struct rpc_message msg = {
2471 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2473 .rpc_resp = pathconf,
2476 /* None of the pathconf attributes are mandatory to implement */
2477 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2478 memset(pathconf, 0, sizeof(*pathconf));
2482 nfs_fattr_init(pathconf->fattr);
2483 return rpc_call_sync(server->client, &msg, 0);
2486 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2487 struct nfs_pathconf *pathconf)
2489 struct nfs4_exception exception = { };
2493 err = nfs4_handle_exception(server,
2494 _nfs4_proc_pathconf(server, fhandle, pathconf),
2496 } while (exception.retry);
2500 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2502 struct nfs_server *server = NFS_SERVER(data->inode);
2504 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
2505 rpc_restart_call(task);
2509 nfs_invalidate_atime(data->inode);
2510 if (task->tk_status > 0)
2511 renew_lease(server, data->timestamp);
2515 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2517 data->timestamp = jiffies;
2518 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2521 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2523 struct inode *inode = data->inode;
2525 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2526 rpc_restart_call(task);
2529 if (task->tk_status >= 0) {
2530 renew_lease(NFS_SERVER(inode), data->timestamp);
2531 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2536 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
2538 struct nfs_server *server = NFS_SERVER(data->inode);
2540 data->args.bitmask = server->attr_bitmask;
2541 data->res.server = server;
2542 data->timestamp = jiffies;
2544 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
2547 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2549 struct inode *inode = data->inode;
2551 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2552 rpc_restart_call(task);
2555 nfs_refresh_inode(inode, data->res.fattr);
2559 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
2561 struct nfs_server *server = NFS_SERVER(data->inode);
2563 data->args.bitmask = server->attr_bitmask;
2564 data->res.server = server;
2565 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
2569 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2570 * standalone procedure for queueing an asynchronous RENEW.
2572 static void nfs4_renew_done(struct rpc_task *task, void *data)
2574 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2575 unsigned long timestamp = (unsigned long)data;
2577 if (task->tk_status < 0) {
2578 switch (task->tk_status) {
2579 case -NFS4ERR_STALE_CLIENTID:
2580 case -NFS4ERR_EXPIRED:
2581 case -NFS4ERR_CB_PATH_DOWN:
2582 nfs4_schedule_state_recovery(clp);
2586 spin_lock(&clp->cl_lock);
2587 if (time_before(clp->cl_last_renewal,timestamp))
2588 clp->cl_last_renewal = timestamp;
2589 spin_unlock(&clp->cl_lock);
2592 static const struct rpc_call_ops nfs4_renew_ops = {
2593 .rpc_call_done = nfs4_renew_done,
2596 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2598 struct rpc_message msg = {
2599 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2604 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2605 &nfs4_renew_ops, (void *)jiffies);
2608 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2610 struct rpc_message msg = {
2611 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2615 unsigned long now = jiffies;
2618 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2621 spin_lock(&clp->cl_lock);
2622 if (time_before(clp->cl_last_renewal,now))
2623 clp->cl_last_renewal = now;
2624 spin_unlock(&clp->cl_lock);
2628 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2630 return (server->caps & NFS_CAP_ACLS)
2631 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2632 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2635 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2636 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2639 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2641 static void buf_to_pages(const void *buf, size_t buflen,
2642 struct page **pages, unsigned int *pgbase)
2644 const void *p = buf;
2646 *pgbase = offset_in_page(buf);
2648 while (p < buf + buflen) {
2649 *(pages++) = virt_to_page(p);
2650 p += PAGE_CACHE_SIZE;
2654 struct nfs4_cached_acl {
2660 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2662 struct nfs_inode *nfsi = NFS_I(inode);
2664 spin_lock(&inode->i_lock);
2665 kfree(nfsi->nfs4_acl);
2666 nfsi->nfs4_acl = acl;
2667 spin_unlock(&inode->i_lock);
2670 static void nfs4_zap_acl_attr(struct inode *inode)
2672 nfs4_set_cached_acl(inode, NULL);
2675 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2677 struct nfs_inode *nfsi = NFS_I(inode);
2678 struct nfs4_cached_acl *acl;
2681 spin_lock(&inode->i_lock);
2682 acl = nfsi->nfs4_acl;
2685 if (buf == NULL) /* user is just asking for length */
2687 if (acl->cached == 0)
2689 ret = -ERANGE; /* see getxattr(2) man page */
2690 if (acl->len > buflen)
2692 memcpy(buf, acl->data, acl->len);
2696 spin_unlock(&inode->i_lock);
2700 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2702 struct nfs4_cached_acl *acl;
2704 if (buf && acl_len <= PAGE_SIZE) {
2705 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2709 memcpy(acl->data, buf, acl_len);
2711 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2718 nfs4_set_cached_acl(inode, acl);
2721 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2723 struct page *pages[NFS4ACL_MAXPAGES];
2724 struct nfs_getaclargs args = {
2725 .fh = NFS_FH(inode),
2729 size_t resp_len = buflen;
2731 struct rpc_message msg = {
2732 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2734 .rpc_resp = &resp_len,
2736 struct page *localpage = NULL;
2739 if (buflen < PAGE_SIZE) {
2740 /* As long as we're doing a round trip to the server anyway,
2741 * let's be prepared for a page of acl data. */
2742 localpage = alloc_page(GFP_KERNEL);
2743 resp_buf = page_address(localpage);
2744 if (localpage == NULL)
2746 args.acl_pages[0] = localpage;
2747 args.acl_pgbase = 0;
2748 resp_len = args.acl_len = PAGE_SIZE;
2751 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2753 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2756 if (resp_len > args.acl_len)
2757 nfs4_write_cached_acl(inode, NULL, resp_len);
2759 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2762 if (resp_len > buflen)
2765 memcpy(buf, resp_buf, resp_len);
2770 __free_page(localpage);
2774 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2776 struct nfs4_exception exception = { };
2779 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2782 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2783 } while (exception.retry);
2787 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2789 struct nfs_server *server = NFS_SERVER(inode);
2792 if (!nfs4_server_supports_acls(server))
2794 ret = nfs_revalidate_inode(server, inode);
2797 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
2798 nfs_zap_acl_cache(inode);
2799 ret = nfs4_read_cached_acl(inode, buf, buflen);
2802 return nfs4_get_acl_uncached(inode, buf, buflen);
2805 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2807 struct nfs_server *server = NFS_SERVER(inode);
2808 struct page *pages[NFS4ACL_MAXPAGES];
2809 struct nfs_setaclargs arg = {
2810 .fh = NFS_FH(inode),
2814 struct rpc_message msg = {
2815 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2821 if (!nfs4_server_supports_acls(server))
2823 nfs_inode_return_delegation(inode);
2824 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2825 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2826 nfs_access_zap_cache(inode);
2827 nfs_zap_acl_cache(inode);
2831 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2833 struct nfs4_exception exception = { };
2836 err = nfs4_handle_exception(NFS_SERVER(inode),
2837 __nfs4_proc_set_acl(inode, buf, buflen),
2839 } while (exception.retry);
2844 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2846 struct nfs_client *clp = server->nfs_client;
2848 if (!clp || task->tk_status >= 0)
2850 switch(task->tk_status) {
2851 case -NFS4ERR_STALE_CLIENTID:
2852 case -NFS4ERR_STALE_STATEID:
2853 case -NFS4ERR_EXPIRED:
2854 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
2855 nfs4_schedule_state_recovery(clp);
2856 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
2857 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
2858 task->tk_status = 0;
2860 case -NFS4ERR_DELAY:
2861 nfs_inc_server_stats(server, NFSIOS_DELAY);
2862 case -NFS4ERR_GRACE:
2863 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2864 task->tk_status = 0;
2866 case -NFS4ERR_OLD_STATEID:
2867 task->tk_status = 0;
2870 task->tk_status = nfs4_map_errors(task->tk_status);
2874 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2876 nfs4_verifier sc_verifier;
2877 struct nfs4_setclientid setclientid = {
2878 .sc_verifier = &sc_verifier,
2881 struct rpc_message msg = {
2882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2883 .rpc_argp = &setclientid,
2891 p = (__be32*)sc_verifier.data;
2892 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2893 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2896 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2897 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
2899 rpc_peeraddr2str(clp->cl_rpcclient,
2901 rpc_peeraddr2str(clp->cl_rpcclient,
2903 clp->cl_rpcclient->cl_auth->au_ops->au_name,
2904 clp->cl_id_uniquifier);
2905 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2906 sizeof(setclientid.sc_netid),
2907 rpc_peeraddr2str(clp->cl_rpcclient,
2908 RPC_DISPLAY_NETID));
2909 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2910 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
2911 clp->cl_ipaddr, port >> 8, port & 255);
2913 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2914 if (status != -NFS4ERR_CLID_INUSE)
2919 ssleep(clp->cl_lease_time + 1);
2921 if (++clp->cl_id_uniquifier == 0)
2927 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2929 struct nfs_fsinfo fsinfo;
2930 struct rpc_message msg = {
2931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2933 .rpc_resp = &fsinfo,
2940 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2942 spin_lock(&clp->cl_lock);
2943 clp->cl_lease_time = fsinfo.lease_time * HZ;
2944 clp->cl_last_renewal = now;
2945 spin_unlock(&clp->cl_lock);
2950 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2955 err = _nfs4_proc_setclientid_confirm(clp, cred);
2959 case -NFS4ERR_RESOURCE:
2960 /* The IBM lawyers misread another document! */
2961 case -NFS4ERR_DELAY:
2962 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2968 struct nfs4_delegreturndata {
2969 struct nfs4_delegreturnargs args;
2970 struct nfs4_delegreturnres res;
2972 nfs4_stateid stateid;
2973 unsigned long timestamp;
2974 struct nfs_fattr fattr;
2978 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2980 struct nfs4_delegreturndata *data = calldata;
2981 data->rpc_status = task->tk_status;
2982 if (data->rpc_status == 0)
2983 renew_lease(data->res.server, data->timestamp);
2986 static void nfs4_delegreturn_release(void *calldata)
2991 static const struct rpc_call_ops nfs4_delegreturn_ops = {
2992 .rpc_call_done = nfs4_delegreturn_done,
2993 .rpc_release = nfs4_delegreturn_release,
2996 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
2998 struct nfs4_delegreturndata *data;
2999 struct nfs_server *server = NFS_SERVER(inode);
3000 struct rpc_task *task;
3001 struct rpc_message msg = {
3002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3005 struct rpc_task_setup task_setup_data = {
3006 .rpc_client = server->client,
3007 .rpc_message = &msg,
3008 .callback_ops = &nfs4_delegreturn_ops,
3009 .flags = RPC_TASK_ASYNC,
3013 data = kmalloc(sizeof(*data), GFP_KERNEL);
3016 data->args.fhandle = &data->fh;
3017 data->args.stateid = &data->stateid;
3018 data->args.bitmask = server->attr_bitmask;
3019 nfs_copy_fh(&data->fh, NFS_FH(inode));
3020 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3021 data->res.fattr = &data->fattr;
3022 data->res.server = server;
3023 nfs_fattr_init(data->res.fattr);
3024 data->timestamp = jiffies;
3025 data->rpc_status = 0;
3027 task_setup_data.callback_data = data;
3028 msg.rpc_argp = &data->args,
3029 msg.rpc_resp = &data->res,
3030 task = rpc_run_task(&task_setup_data);
3032 return PTR_ERR(task);
3035 status = nfs4_wait_for_completion_rpc_task(task);
3038 status = data->rpc_status;
3041 nfs_refresh_inode(inode, &data->fattr);
3047 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3049 struct nfs_server *server = NFS_SERVER(inode);
3050 struct nfs4_exception exception = { };
3053 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3055 case -NFS4ERR_STALE_STATEID:
3056 case -NFS4ERR_EXPIRED:
3060 err = nfs4_handle_exception(server, err, &exception);
3061 } while (exception.retry);
3065 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3066 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3069 * sleep, with exponential backoff, and retry the LOCK operation.
3071 static unsigned long
3072 nfs4_set_lock_task_retry(unsigned long timeout)
3074 schedule_timeout_killable(timeout);
3076 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3077 return NFS4_LOCK_MAXTIMEOUT;
3081 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3083 struct inode *inode = state->inode;
3084 struct nfs_server *server = NFS_SERVER(inode);
3085 struct nfs_client *clp = server->nfs_client;
3086 struct nfs_lockt_args arg = {
3087 .fh = NFS_FH(inode),
3090 struct nfs_lockt_res res = {
3093 struct rpc_message msg = {
3094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3097 .rpc_cred = state->owner->so_cred,
3099 struct nfs4_lock_state *lsp;
3102 down_read(&clp->cl_sem);
3103 arg.lock_owner.clientid = clp->cl_clientid;
3104 status = nfs4_set_lock_state(state, request);
3107 lsp = request->fl_u.nfs4_fl.owner;
3108 arg.lock_owner.id = lsp->ls_id.id;
3109 status = rpc_call_sync(server->client, &msg, 0);
3112 request->fl_type = F_UNLCK;
3114 case -NFS4ERR_DENIED:
3117 request->fl_ops->fl_release_private(request);
3119 up_read(&clp->cl_sem);
3123 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3125 struct nfs4_exception exception = { };
3129 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3130 _nfs4_proc_getlk(state, cmd, request),
3132 } while (exception.retry);
3136 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3139 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3141 res = posix_lock_file_wait(file, fl);
3144 res = flock_lock_file_wait(file, fl);
3152 struct nfs4_unlockdata {
3153 struct nfs_locku_args arg;
3154 struct nfs_locku_res res;
3155 struct nfs4_lock_state *lsp;
3156 struct nfs_open_context *ctx;
3157 struct file_lock fl;
3158 const struct nfs_server *server;
3159 unsigned long timestamp;
3162 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3163 struct nfs_open_context *ctx,
3164 struct nfs4_lock_state *lsp,
3165 struct nfs_seqid *seqid)
3167 struct nfs4_unlockdata *p;
3168 struct inode *inode = lsp->ls_state->inode;
3170 p = kmalloc(sizeof(*p), GFP_KERNEL);
3173 p->arg.fh = NFS_FH(inode);
3175 p->arg.seqid = seqid;
3176 p->res.seqid = seqid;
3177 p->arg.stateid = &lsp->ls_stateid;
3179 atomic_inc(&lsp->ls_count);
3180 /* Ensure we don't close file until we're done freeing locks! */
3181 p->ctx = get_nfs_open_context(ctx);
3182 memcpy(&p->fl, fl, sizeof(p->fl));
3183 p->server = NFS_SERVER(inode);
3187 static void nfs4_locku_release_calldata(void *data)
3189 struct nfs4_unlockdata *calldata = data;
3190 nfs_free_seqid(calldata->arg.seqid);
3191 nfs4_put_lock_state(calldata->lsp);
3192 put_nfs_open_context(calldata->ctx);
3196 static void nfs4_locku_done(struct rpc_task *task, void *data)
3198 struct nfs4_unlockdata *calldata = data;
3200 if (RPC_ASSASSINATED(task))
3202 switch (task->tk_status) {
3204 memcpy(calldata->lsp->ls_stateid.data,
3205 calldata->res.stateid.data,
3206 sizeof(calldata->lsp->ls_stateid.data));
3207 renew_lease(calldata->server, calldata->timestamp);
3209 case -NFS4ERR_STALE_STATEID:
3210 case -NFS4ERR_EXPIRED:
3213 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
3214 rpc_restart_call(task);
3218 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3220 struct nfs4_unlockdata *calldata = data;
3222 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3224 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3225 /* Note: exit _without_ running nfs4_locku_done */
3226 task->tk_action = NULL;
3229 calldata->timestamp = jiffies;
3230 rpc_call_start(task);
3233 static const struct rpc_call_ops nfs4_locku_ops = {
3234 .rpc_call_prepare = nfs4_locku_prepare,
3235 .rpc_call_done = nfs4_locku_done,
3236 .rpc_release = nfs4_locku_release_calldata,
3239 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3240 struct nfs_open_context *ctx,
3241 struct nfs4_lock_state *lsp,
3242 struct nfs_seqid *seqid)
3244 struct nfs4_unlockdata *data;
3245 struct rpc_message msg = {
3246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3247 .rpc_cred = ctx->cred,
3249 struct rpc_task_setup task_setup_data = {
3250 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3251 .rpc_message = &msg,
3252 .callback_ops = &nfs4_locku_ops,
3253 .workqueue = nfsiod_workqueue,
3254 .flags = RPC_TASK_ASYNC,
3257 /* Ensure this is an unlock - when canceling a lock, the
3258 * canceled lock is passed in, and it won't be an unlock.
3260 fl->fl_type = F_UNLCK;
3262 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3264 nfs_free_seqid(seqid);
3265 return ERR_PTR(-ENOMEM);
3268 msg.rpc_argp = &data->arg,
3269 msg.rpc_resp = &data->res,
3270 task_setup_data.callback_data = data;
3271 return rpc_run_task(&task_setup_data);
3274 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3276 struct nfs_client *clp = state->owner->so_client;
3277 struct nfs_inode *nfsi = NFS_I(state->inode);
3278 struct nfs_seqid *seqid;
3279 struct nfs4_lock_state *lsp;
3280 struct rpc_task *task;
3282 unsigned char fl_flags = request->fl_flags;
3284 status = nfs4_set_lock_state(state, request);
3285 /* Unlock _before_ we do the RPC call */
3286 request->fl_flags |= FL_EXISTS;
3287 down_read(&clp->cl_sem);
3288 down_read(&nfsi->rwsem);
3289 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
3290 up_read(&nfsi->rwsem);
3291 up_read(&clp->cl_sem);
3294 up_read(&nfsi->rwsem);
3295 up_read(&clp->cl_sem);
3298 /* Is this a delegated lock? */
3299 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3301 lsp = request->fl_u.nfs4_fl.owner;
3302 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3306 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3307 status = PTR_ERR(task);
3310 status = nfs4_wait_for_completion_rpc_task(task);
3313 request->fl_flags = fl_flags;
3317 struct nfs4_lockdata {
3318 struct nfs_lock_args arg;
3319 struct nfs_lock_res res;
3320 struct nfs4_lock_state *lsp;
3321 struct nfs_open_context *ctx;
3322 struct file_lock fl;
3323 unsigned long timestamp;
3328 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3329 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3331 struct nfs4_lockdata *p;
3332 struct inode *inode = lsp->ls_state->inode;
3333 struct nfs_server *server = NFS_SERVER(inode);
3335 p = kzalloc(sizeof(*p), GFP_KERNEL);
3339 p->arg.fh = NFS_FH(inode);
3341 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3342 if (p->arg.open_seqid == NULL)
3344 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3345 if (p->arg.lock_seqid == NULL)
3346 goto out_free_seqid;
3347 p->arg.lock_stateid = &lsp->ls_stateid;
3348 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3349 p->arg.lock_owner.id = lsp->ls_id.id;
3350 p->res.lock_seqid = p->arg.lock_seqid;
3352 atomic_inc(&lsp->ls_count);
3353 p->ctx = get_nfs_open_context(ctx);
3354 memcpy(&p->fl, fl, sizeof(p->fl));
3357 nfs_free_seqid(p->arg.open_seqid);
3363 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3365 struct nfs4_lockdata *data = calldata;
3366 struct nfs4_state *state = data->lsp->ls_state;
3368 dprintk("%s: begin!\n", __func__);
3369 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3371 /* Do we need to do an open_to_lock_owner? */
3372 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3373 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3375 data->arg.open_stateid = &state->stateid;
3376 data->arg.new_lock_owner = 1;
3377 data->res.open_seqid = data->arg.open_seqid;
3379 data->arg.new_lock_owner = 0;
3380 data->timestamp = jiffies;
3381 rpc_call_start(task);
3382 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3385 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3387 struct nfs4_lockdata *data = calldata;
3389 dprintk("%s: begin!\n", __func__);
3391 data->rpc_status = task->tk_status;
3392 if (RPC_ASSASSINATED(task))
3394 if (data->arg.new_lock_owner != 0) {
3395 if (data->rpc_status == 0)
3396 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3400 if (data->rpc_status == 0) {
3401 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3402 sizeof(data->lsp->ls_stateid.data));
3403 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3404 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3407 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3410 static void nfs4_lock_release(void *calldata)
3412 struct nfs4_lockdata *data = calldata;
3414 dprintk("%s: begin!\n", __func__);
3415 nfs_free_seqid(data->arg.open_seqid);
3416 if (data->cancelled != 0) {
3417 struct rpc_task *task;
3418 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3419 data->arg.lock_seqid);
3422 dprintk("%s: cancelling lock!\n", __func__);
3424 nfs_free_seqid(data->arg.lock_seqid);
3425 nfs4_put_lock_state(data->lsp);
3426 put_nfs_open_context(data->ctx);
3428 dprintk("%s: done!\n", __func__);
3431 static const struct rpc_call_ops nfs4_lock_ops = {
3432 .rpc_call_prepare = nfs4_lock_prepare,
3433 .rpc_call_done = nfs4_lock_done,
3434 .rpc_release = nfs4_lock_release,
3437 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3439 struct nfs4_lockdata *data;
3440 struct rpc_task *task;
3441 struct rpc_message msg = {
3442 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3443 .rpc_cred = state->owner->so_cred,
3445 struct rpc_task_setup task_setup_data = {
3446 .rpc_client = NFS_CLIENT(state->inode),
3447 .rpc_message = &msg,
3448 .callback_ops = &nfs4_lock_ops,
3449 .workqueue = nfsiod_workqueue,
3450 .flags = RPC_TASK_ASYNC,
3454 dprintk("%s: begin!\n", __func__);
3455 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3456 fl->fl_u.nfs4_fl.owner);
3460 data->arg.block = 1;
3462 data->arg.reclaim = 1;
3463 msg.rpc_argp = &data->arg,
3464 msg.rpc_resp = &data->res,
3465 task_setup_data.callback_data = data;
3466 task = rpc_run_task(&task_setup_data);
3468 return PTR_ERR(task);
3469 ret = nfs4_wait_for_completion_rpc_task(task);
3471 ret = data->rpc_status;
3472 if (ret == -NFS4ERR_DENIED)
3475 data->cancelled = 1;
3477 dprintk("%s: done, ret = %d!\n", __func__, ret);
3481 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3483 struct nfs_server *server = NFS_SERVER(state->inode);
3484 struct nfs4_exception exception = { };
3488 /* Cache the lock if possible... */
3489 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3491 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3492 if (err != -NFS4ERR_DELAY)
3494 nfs4_handle_exception(server, err, &exception);
3495 } while (exception.retry);
3499 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3501 struct nfs_server *server = NFS_SERVER(state->inode);
3502 struct nfs4_exception exception = { };
3505 err = nfs4_set_lock_state(state, request);
3509 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3511 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3512 if (err != -NFS4ERR_DELAY)
3514 nfs4_handle_exception(server, err, &exception);
3515 } while (exception.retry);
3519 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3521 struct nfs_client *clp = state->owner->so_client;
3522 struct nfs_inode *nfsi = NFS_I(state->inode);
3523 unsigned char fl_flags = request->fl_flags;
3526 /* Is this a delegated open? */
3527 status = nfs4_set_lock_state(state, request);
3530 request->fl_flags |= FL_ACCESS;
3531 status = do_vfs_lock(request->fl_file, request);
3534 down_read(&clp->cl_sem);
3535 down_read(&nfsi->rwsem);
3536 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3537 /* Yes: cache locks! */
3538 /* ...but avoid races with delegation recall... */
3539 request->fl_flags = fl_flags & ~FL_SLEEP;
3540 status = do_vfs_lock(request->fl_file, request);
3543 status = _nfs4_do_setlk(state, cmd, request, 0);
3546 /* Note: we always want to sleep here! */
3547 request->fl_flags = fl_flags | FL_SLEEP;
3548 if (do_vfs_lock(request->fl_file, request) < 0)
3549 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
3551 up_read(&nfsi->rwsem);
3552 up_read(&clp->cl_sem);
3554 request->fl_flags = fl_flags;
3558 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3560 struct nfs4_exception exception = { };
3564 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3565 _nfs4_proc_setlk(state, cmd, request),
3567 } while (exception.retry);
3572 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3574 struct nfs_open_context *ctx;
3575 struct nfs4_state *state;
3576 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3579 /* verify open state */
3580 ctx = nfs_file_open_context(filp);
3583 if (request->fl_start < 0 || request->fl_end < 0)
3587 return nfs4_proc_getlk(state, F_GETLK, request);
3589 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3592 if (request->fl_type == F_UNLCK)
3593 return nfs4_proc_unlck(state, cmd, request);
3596 status = nfs4_proc_setlk(state, cmd, request);
3597 if ((status != -EAGAIN) || IS_SETLK(cmd))
3599 timeout = nfs4_set_lock_task_retry(timeout);
3600 status = -ERESTARTSYS;
3603 } while(status < 0);
3607 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3609 struct nfs_server *server = NFS_SERVER(state->inode);
3610 struct nfs4_exception exception = { };
3613 err = nfs4_set_lock_state(state, fl);
3617 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3618 if (err != -NFS4ERR_DELAY)
3620 err = nfs4_handle_exception(server, err, &exception);
3621 } while (exception.retry);
3626 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3628 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3629 size_t buflen, int flags)
3631 struct inode *inode = dentry->d_inode;
3633 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3636 return nfs4_proc_set_acl(inode, buf, buflen);
3639 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3640 * and that's what we'll do for e.g. user attributes that haven't been set.
3641 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3642 * attributes in kernel-managed attribute namespaces. */
3643 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3646 struct inode *inode = dentry->d_inode;
3648 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3651 return nfs4_proc_get_acl(inode, buf, buflen);
3654 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3656 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3658 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3660 if (buf && buflen < len)
3663 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3667 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
3668 struct nfs4_fs_locations *fs_locations, struct page *page)
3670 struct nfs_server *server = NFS_SERVER(dir);
3672 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3673 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3675 struct nfs4_fs_locations_arg args = {
3676 .dir_fh = NFS_FH(dir),
3681 struct rpc_message msg = {
3682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3684 .rpc_resp = fs_locations,
3688 dprintk("%s: start\n", __func__);
3689 nfs_fattr_init(&fs_locations->fattr);
3690 fs_locations->server = server;
3691 fs_locations->nlocations = 0;
3692 status = rpc_call_sync(server->client, &msg, 0);
3693 dprintk("%s: returned status = %d\n", __func__, status);
3697 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3698 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
3699 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
3700 .recover_open = nfs4_open_reclaim,
3701 .recover_lock = nfs4_lock_reclaim,
3704 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops = {
3705 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
3706 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
3707 .recover_open = nfs4_open_expired,
3708 .recover_lock = nfs4_lock_expired,
3711 static const struct inode_operations nfs4_file_inode_operations = {
3712 .permission = nfs_permission,
3713 .getattr = nfs_getattr,
3714 .setattr = nfs_setattr,
3715 .getxattr = nfs4_getxattr,
3716 .setxattr = nfs4_setxattr,
3717 .listxattr = nfs4_listxattr,
3720 const struct nfs_rpc_ops nfs_v4_clientops = {
3721 .version = 4, /* protocol version */
3722 .dentry_ops = &nfs4_dentry_operations,
3723 .dir_inode_ops = &nfs4_dir_inode_operations,
3724 .file_inode_ops = &nfs4_file_inode_operations,
3725 .getroot = nfs4_proc_get_root,
3726 .getattr = nfs4_proc_getattr,
3727 .setattr = nfs4_proc_setattr,
3728 .lookupfh = nfs4_proc_lookupfh,
3729 .lookup = nfs4_proc_lookup,
3730 .access = nfs4_proc_access,
3731 .readlink = nfs4_proc_readlink,
3732 .create = nfs4_proc_create,
3733 .remove = nfs4_proc_remove,
3734 .unlink_setup = nfs4_proc_unlink_setup,
3735 .unlink_done = nfs4_proc_unlink_done,
3736 .rename = nfs4_proc_rename,
3737 .link = nfs4_proc_link,
3738 .symlink = nfs4_proc_symlink,
3739 .mkdir = nfs4_proc_mkdir,
3740 .rmdir = nfs4_proc_remove,
3741 .readdir = nfs4_proc_readdir,
3742 .mknod = nfs4_proc_mknod,
3743 .statfs = nfs4_proc_statfs,
3744 .fsinfo = nfs4_proc_fsinfo,
3745 .pathconf = nfs4_proc_pathconf,
3746 .set_capabilities = nfs4_server_capabilities,
3747 .decode_dirent = nfs4_decode_dirent,
3748 .read_setup = nfs4_proc_read_setup,
3749 .read_done = nfs4_read_done,
3750 .write_setup = nfs4_proc_write_setup,
3751 .write_done = nfs4_write_done,
3752 .commit_setup = nfs4_proc_commit_setup,
3753 .commit_done = nfs4_commit_done,
3754 .lock = nfs4_proc_lock,
3755 .clear_acl_cache = nfs4_zap_acl_attr,