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"
56 #define NFSDBG_FACILITY NFSDBG_PROC
58 #define NFS4_POLL_RETRY_MIN (HZ/10)
59 #define NFS4_POLL_RETRY_MAX (15*HZ)
62 static int _nfs4_proc_open(struct nfs4_opendata *data);
63 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
64 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
65 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
66 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
67 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
68 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
70 /* Prevent leaks of NFSv4 errors into userland */
71 int nfs4_map_errors(int err)
74 dprintk("%s could not handle NFSv4 error %d\n",
82 * This is our standard bitmap for GETATTR requests.
84 const u32 nfs4_fattr_bitmap[2] = {
89 | FATTR4_WORD0_FILEID,
91 | FATTR4_WORD1_NUMLINKS
93 | FATTR4_WORD1_OWNER_GROUP
95 | FATTR4_WORD1_SPACE_USED
96 | FATTR4_WORD1_TIME_ACCESS
97 | FATTR4_WORD1_TIME_METADATA
98 | FATTR4_WORD1_TIME_MODIFY
101 const u32 nfs4_statfs_bitmap[2] = {
102 FATTR4_WORD0_FILES_AVAIL
103 | FATTR4_WORD0_FILES_FREE
104 | FATTR4_WORD0_FILES_TOTAL,
105 FATTR4_WORD1_SPACE_AVAIL
106 | FATTR4_WORD1_SPACE_FREE
107 | FATTR4_WORD1_SPACE_TOTAL
110 const u32 nfs4_pathconf_bitmap[2] = {
112 | FATTR4_WORD0_MAXNAME,
116 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
117 | FATTR4_WORD0_MAXREAD
118 | FATTR4_WORD0_MAXWRITE
119 | FATTR4_WORD0_LEASE_TIME,
123 const u32 nfs4_fs_locations_bitmap[2] = {
125 | FATTR4_WORD0_CHANGE
128 | FATTR4_WORD0_FILEID
129 | FATTR4_WORD0_FS_LOCATIONS,
131 | FATTR4_WORD1_NUMLINKS
133 | FATTR4_WORD1_OWNER_GROUP
134 | FATTR4_WORD1_RAWDEV
135 | FATTR4_WORD1_SPACE_USED
136 | FATTR4_WORD1_TIME_ACCESS
137 | FATTR4_WORD1_TIME_METADATA
138 | FATTR4_WORD1_TIME_MODIFY
139 | FATTR4_WORD1_MOUNTED_ON_FILEID
142 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
143 struct nfs4_readdir_arg *readdir)
147 BUG_ON(readdir->count < 80);
149 readdir->cookie = cookie;
150 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
155 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
160 * NFSv4 servers do not return entries for '.' and '..'
161 * Therefore, we fake these entries here. We let '.'
162 * have cookie 0 and '..' have cookie 1. Note that
163 * when talking to the server, we always send cookie 0
166 start = p = kmap_atomic(*readdir->pages, KM_USER0);
169 *p++ = xdr_one; /* next */
170 *p++ = xdr_zero; /* cookie, first word */
171 *p++ = xdr_one; /* cookie, second word */
172 *p++ = xdr_one; /* entry len */
173 memcpy(p, ".\0\0\0", 4); /* entry */
175 *p++ = xdr_one; /* bitmap length */
176 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
177 *p++ = htonl(8); /* attribute buffer length */
178 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
181 *p++ = xdr_one; /* next */
182 *p++ = xdr_zero; /* cookie, first word */
183 *p++ = xdr_two; /* cookie, second word */
184 *p++ = xdr_two; /* entry len */
185 memcpy(p, "..\0\0", 4); /* entry */
187 *p++ = xdr_one; /* bitmap length */
188 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
189 *p++ = htonl(8); /* attribute buffer length */
190 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
192 readdir->pgbase = (char *)p - (char *)start;
193 readdir->count -= readdir->pgbase;
194 kunmap_atomic(start, KM_USER0);
197 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
199 struct nfs_client *clp = server->nfs_client;
200 spin_lock(&clp->cl_lock);
201 if (time_before(clp->cl_last_renewal,timestamp))
202 clp->cl_last_renewal = timestamp;
203 spin_unlock(&clp->cl_lock);
206 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
208 struct nfs_inode *nfsi = NFS_I(dir);
210 spin_lock(&dir->i_lock);
211 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
212 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
213 nfs_force_lookup_revalidate(dir);
214 nfsi->change_attr = cinfo->after;
215 spin_unlock(&dir->i_lock);
218 struct nfs4_opendata {
220 struct nfs_openargs o_arg;
221 struct nfs_openres o_res;
222 struct nfs_open_confirmargs c_arg;
223 struct nfs_open_confirmres c_res;
224 struct nfs_fattr f_attr;
225 struct nfs_fattr dir_attr;
228 struct nfs4_state_owner *owner;
229 struct nfs4_state *state;
231 unsigned long timestamp;
232 unsigned int rpc_done : 1;
238 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
240 p->o_res.f_attr = &p->f_attr;
241 p->o_res.dir_attr = &p->dir_attr;
242 p->o_res.server = p->o_arg.server;
243 nfs_fattr_init(&p->f_attr);
244 nfs_fattr_init(&p->dir_attr);
247 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
248 struct nfs4_state_owner *sp, int flags,
249 const struct iattr *attrs)
251 struct dentry *parent = dget_parent(path->dentry);
252 struct inode *dir = parent->d_inode;
253 struct nfs_server *server = NFS_SERVER(dir);
254 struct nfs4_opendata *p;
256 p = kzalloc(sizeof(*p), GFP_KERNEL);
259 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
260 if (p->o_arg.seqid == NULL)
262 p->path.mnt = mntget(path->mnt);
263 p->path.dentry = dget(path->dentry);
266 atomic_inc(&sp->so_count);
267 p->o_arg.fh = NFS_FH(dir);
268 p->o_arg.open_flags = flags,
269 p->o_arg.clientid = server->nfs_client->cl_clientid;
270 p->o_arg.id = sp->so_owner_id.id;
271 p->o_arg.name = &p->path.dentry->d_name;
272 p->o_arg.server = server;
273 p->o_arg.bitmask = server->attr_bitmask;
274 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
275 if (flags & O_EXCL) {
276 u32 *s = (u32 *) p->o_arg.u.verifier.data;
279 } else if (flags & O_CREAT) {
280 p->o_arg.u.attrs = &p->attrs;
281 memcpy(&p->attrs, attrs, sizeof(p->attrs));
283 p->c_arg.fh = &p->o_res.fh;
284 p->c_arg.stateid = &p->o_res.stateid;
285 p->c_arg.seqid = p->o_arg.seqid;
286 nfs4_init_opendata_res(p);
296 static void nfs4_opendata_free(struct kref *kref)
298 struct nfs4_opendata *p = container_of(kref,
299 struct nfs4_opendata, kref);
301 nfs_free_seqid(p->o_arg.seqid);
302 if (p->state != NULL)
303 nfs4_put_open_state(p->state);
304 nfs4_put_state_owner(p->owner);
306 dput(p->path.dentry);
311 static void nfs4_opendata_put(struct nfs4_opendata *p)
314 kref_put(&p->kref, nfs4_opendata_free);
317 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
322 rpc_clnt_sigmask(task->tk_client, &oldset);
323 ret = rpc_wait_for_completion_task(task);
324 rpc_clnt_sigunmask(task->tk_client, &oldset);
328 static int can_open_cached(struct nfs4_state *state, int mode)
331 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
333 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
336 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
338 case FMODE_READ|FMODE_WRITE:
339 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
344 static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
346 if ((delegation->type & open_flags) != open_flags)
348 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
353 static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
355 switch (open_flags) {
362 case FMODE_READ|FMODE_WRITE:
365 nfs4_state_set_mode_locked(state, state->state | open_flags);
368 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
370 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
371 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
372 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
373 switch (open_flags) {
375 set_bit(NFS_O_RDONLY_STATE, &state->flags);
378 set_bit(NFS_O_WRONLY_STATE, &state->flags);
380 case FMODE_READ|FMODE_WRITE:
381 set_bit(NFS_O_RDWR_STATE, &state->flags);
385 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
387 write_seqlock(&state->seqlock);
388 nfs_set_open_stateid_locked(state, stateid, open_flags);
389 write_sequnlock(&state->seqlock);
392 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
394 open_flags &= (FMODE_READ|FMODE_WRITE);
396 * Protect the call to nfs4_state_set_mode_locked and
397 * serialise the stateid update
399 write_seqlock(&state->seqlock);
400 if (deleg_stateid != NULL) {
401 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
402 set_bit(NFS_DELEGATED_STATE, &state->flags);
404 if (open_stateid != NULL)
405 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
406 write_sequnlock(&state->seqlock);
407 spin_lock(&state->owner->so_lock);
408 update_open_stateflags(state, open_flags);
409 spin_unlock(&state->owner->so_lock);
412 static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
414 struct nfs_delegation *delegation;
417 delegation = rcu_dereference(NFS_I(inode)->delegation);
418 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
423 nfs_inode_return_delegation(inode);
426 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
428 struct nfs4_state *state = opendata->state;
429 struct nfs_inode *nfsi = NFS_I(state->inode);
430 struct nfs_delegation *delegation;
431 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
432 nfs4_stateid stateid;
436 delegation = rcu_dereference(nfsi->delegation);
438 if (can_open_cached(state, open_mode)) {
439 spin_lock(&state->owner->so_lock);
440 if (can_open_cached(state, open_mode)) {
441 update_open_stateflags(state, open_mode);
442 spin_unlock(&state->owner->so_lock);
444 goto out_return_state;
446 spin_unlock(&state->owner->so_lock);
448 if (delegation == NULL)
450 if (!can_open_delegated(delegation, open_mode))
452 /* Save the delegation */
453 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
456 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
462 delegation = rcu_dereference(nfsi->delegation);
463 /* If no delegation, try a cached open */
464 if (delegation == NULL)
466 /* Is the delegation still valid? */
467 if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
470 update_open_stateid(state, NULL, &stateid, open_mode);
471 goto out_return_state;
477 atomic_inc(&state->count);
481 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
484 struct nfs4_state *state = NULL;
485 struct nfs_delegation *delegation;
486 nfs4_stateid *deleg_stateid = NULL;
489 if (!data->rpc_done) {
490 state = nfs4_try_open_cached(data);
495 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
497 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
498 ret = PTR_ERR(inode);
502 state = nfs4_get_open_state(inode, data->owner);
505 if (data->o_res.delegation_type != 0) {
506 int delegation_flags = 0;
509 delegation = rcu_dereference(NFS_I(inode)->delegation);
511 delegation_flags = delegation->flags;
513 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
514 nfs_inode_set_delegation(state->inode,
515 data->owner->so_cred,
518 nfs_inode_reclaim_delegation(state->inode,
519 data->owner->so_cred,
523 delegation = rcu_dereference(NFS_I(inode)->delegation);
524 if (delegation != NULL)
525 deleg_stateid = &delegation->stateid;
526 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
537 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
539 struct nfs_inode *nfsi = NFS_I(state->inode);
540 struct nfs_open_context *ctx;
542 spin_lock(&state->inode->i_lock);
543 list_for_each_entry(ctx, &nfsi->open_files, list) {
544 if (ctx->state != state)
546 get_nfs_open_context(ctx);
547 spin_unlock(&state->inode->i_lock);
550 spin_unlock(&state->inode->i_lock);
551 return ERR_PTR(-ENOENT);
554 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
556 struct nfs4_opendata *opendata;
558 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
559 if (opendata == NULL)
560 return ERR_PTR(-ENOMEM);
561 opendata->state = state;
562 atomic_inc(&state->count);
566 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
568 struct nfs4_state *newstate;
571 opendata->o_arg.open_flags = openflags;
572 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
573 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
574 nfs4_init_opendata_res(opendata);
575 ret = _nfs4_proc_open(opendata);
578 newstate = nfs4_opendata_to_nfs4_state(opendata);
579 if (IS_ERR(newstate))
580 return PTR_ERR(newstate);
581 nfs4_close_state(&opendata->path, newstate, openflags);
586 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
588 struct nfs4_state *newstate;
591 /* memory barrier prior to reading state->n_* */
592 clear_bit(NFS_DELEGATED_STATE, &state->flags);
594 if (state->n_rdwr != 0) {
595 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
598 if (newstate != state)
601 if (state->n_wronly != 0) {
602 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
605 if (newstate != state)
608 if (state->n_rdonly != 0) {
609 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
612 if (newstate != state)
616 * We may have performed cached opens for all three recoveries.
617 * Check if we need to update the current stateid.
619 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
620 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
621 write_seqlock(&state->seqlock);
622 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
623 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
624 write_sequnlock(&state->seqlock);
631 * reclaim state on the server after a reboot.
633 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
635 struct nfs_delegation *delegation;
636 struct nfs4_opendata *opendata;
637 int delegation_type = 0;
640 opendata = nfs4_open_recoverdata_alloc(ctx, state);
641 if (IS_ERR(opendata))
642 return PTR_ERR(opendata);
643 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
644 opendata->o_arg.fh = NFS_FH(state->inode);
646 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
647 if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
648 delegation_type = delegation->type;
650 opendata->o_arg.u.delegation_type = delegation_type;
651 status = nfs4_open_recover(opendata, state);
652 nfs4_opendata_put(opendata);
656 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
658 struct nfs_server *server = NFS_SERVER(state->inode);
659 struct nfs4_exception exception = { };
662 err = _nfs4_do_open_reclaim(ctx, state);
663 if (err != -NFS4ERR_DELAY)
665 nfs4_handle_exception(server, err, &exception);
666 } while (exception.retry);
670 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
672 struct nfs_open_context *ctx;
675 ctx = nfs4_state_find_open_context(state);
678 ret = nfs4_do_open_reclaim(ctx, state);
679 put_nfs_open_context(ctx);
683 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
685 struct nfs4_opendata *opendata;
688 opendata = nfs4_open_recoverdata_alloc(ctx, state);
689 if (IS_ERR(opendata))
690 return PTR_ERR(opendata);
691 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
692 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
693 sizeof(opendata->o_arg.u.delegation.data));
694 ret = nfs4_open_recover(opendata, state);
695 nfs4_opendata_put(opendata);
699 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
701 struct nfs4_exception exception = { };
702 struct nfs_server *server = NFS_SERVER(state->inode);
705 err = _nfs4_open_delegation_recall(ctx, state, stateid);
709 case -NFS4ERR_STALE_CLIENTID:
710 case -NFS4ERR_STALE_STATEID:
711 case -NFS4ERR_EXPIRED:
712 /* Don't recall a delegation if it was lost */
713 nfs4_schedule_state_recovery(server->nfs_client);
716 err = nfs4_handle_exception(server, err, &exception);
717 } while (exception.retry);
721 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
723 struct nfs4_opendata *data = calldata;
725 data->rpc_status = task->tk_status;
726 if (RPC_ASSASSINATED(task))
728 if (data->rpc_status == 0) {
729 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
730 sizeof(data->o_res.stateid.data));
731 nfs_confirm_seqid(&data->owner->so_seqid, 0);
732 renew_lease(data->o_res.server, data->timestamp);
735 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
738 static void nfs4_open_confirm_release(void *calldata)
740 struct nfs4_opendata *data = calldata;
741 struct nfs4_state *state = NULL;
743 /* If this request hasn't been cancelled, do nothing */
744 if (data->cancelled == 0)
746 /* In case of error, no cleanup! */
749 state = nfs4_opendata_to_nfs4_state(data);
751 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
753 nfs4_opendata_put(data);
756 static const struct rpc_call_ops nfs4_open_confirm_ops = {
757 .rpc_call_done = nfs4_open_confirm_done,
758 .rpc_release = nfs4_open_confirm_release,
762 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
764 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
766 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
767 struct rpc_task *task;
768 struct rpc_message msg = {
769 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
770 .rpc_argp = &data->c_arg,
771 .rpc_resp = &data->c_res,
772 .rpc_cred = data->owner->so_cred,
774 struct rpc_task_setup task_setup_data = {
775 .rpc_client = server->client,
777 .callback_ops = &nfs4_open_confirm_ops,
778 .callback_data = data,
779 .flags = RPC_TASK_ASYNC,
783 kref_get(&data->kref);
785 data->rpc_status = 0;
786 data->timestamp = jiffies;
787 task = rpc_run_task(&task_setup_data);
789 return PTR_ERR(task);
790 status = nfs4_wait_for_completion_rpc_task(task);
795 status = data->rpc_status;
800 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
802 struct nfs4_opendata *data = calldata;
803 struct nfs4_state_owner *sp = data->owner;
805 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
808 * Check if we still need to send an OPEN call, or if we can use
809 * a delegation instead.
811 if (data->state != NULL) {
812 struct nfs_delegation *delegation;
814 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
817 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
818 if (delegation != NULL &&
819 (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
825 /* Update sequence id. */
826 data->o_arg.id = sp->so_owner_id.id;
827 data->o_arg.clientid = sp->so_client->cl_clientid;
828 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
829 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
830 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
832 data->timestamp = jiffies;
833 rpc_call_start(task);
836 task->tk_action = NULL;
840 static void nfs4_open_done(struct rpc_task *task, void *calldata)
842 struct nfs4_opendata *data = calldata;
844 data->rpc_status = task->tk_status;
845 if (RPC_ASSASSINATED(task))
847 if (task->tk_status == 0) {
848 switch (data->o_res.f_attr->mode & S_IFMT) {
852 data->rpc_status = -ELOOP;
855 data->rpc_status = -EISDIR;
858 data->rpc_status = -ENOTDIR;
860 renew_lease(data->o_res.server, data->timestamp);
861 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
862 nfs_confirm_seqid(&data->owner->so_seqid, 0);
864 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
868 static void nfs4_open_release(void *calldata)
870 struct nfs4_opendata *data = calldata;
871 struct nfs4_state *state = NULL;
873 /* If this request hasn't been cancelled, do nothing */
874 if (data->cancelled == 0)
876 /* In case of error, no cleanup! */
877 if (data->rpc_status != 0 || !data->rpc_done)
879 /* In case we need an open_confirm, no cleanup! */
880 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
882 state = nfs4_opendata_to_nfs4_state(data);
884 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
886 nfs4_opendata_put(data);
889 static const struct rpc_call_ops nfs4_open_ops = {
890 .rpc_call_prepare = nfs4_open_prepare,
891 .rpc_call_done = nfs4_open_done,
892 .rpc_release = nfs4_open_release,
896 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
898 static int _nfs4_proc_open(struct nfs4_opendata *data)
900 struct inode *dir = data->dir->d_inode;
901 struct nfs_server *server = NFS_SERVER(dir);
902 struct nfs_openargs *o_arg = &data->o_arg;
903 struct nfs_openres *o_res = &data->o_res;
904 struct rpc_task *task;
905 struct rpc_message msg = {
906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
909 .rpc_cred = data->owner->so_cred,
911 struct rpc_task_setup task_setup_data = {
912 .rpc_client = server->client,
914 .callback_ops = &nfs4_open_ops,
915 .callback_data = data,
916 .flags = RPC_TASK_ASYNC,
920 kref_get(&data->kref);
922 data->rpc_status = 0;
924 task = rpc_run_task(&task_setup_data);
926 return PTR_ERR(task);
927 status = nfs4_wait_for_completion_rpc_task(task);
932 status = data->rpc_status;
934 if (status != 0 || !data->rpc_done)
937 if (o_res->fh.size == 0)
938 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
940 if (o_arg->open_flags & O_CREAT) {
941 update_changeattr(dir, &o_res->cinfo);
942 nfs_post_op_update_inode(dir, o_res->dir_attr);
944 nfs_refresh_inode(dir, o_res->dir_attr);
945 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
946 status = _nfs4_proc_open_confirm(data);
950 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
951 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
955 static int nfs4_recover_expired_lease(struct nfs_server *server)
957 struct nfs_client *clp = server->nfs_client;
961 ret = nfs4_wait_clnt_recover(server->client, clp);
964 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
966 nfs4_schedule_state_recovery(clp);
973 * reclaim state on the server after a network partition.
974 * Assumes caller holds the appropriate lock
976 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
978 struct nfs4_opendata *opendata;
981 opendata = nfs4_open_recoverdata_alloc(ctx, state);
982 if (IS_ERR(opendata))
983 return PTR_ERR(opendata);
984 ret = nfs4_open_recover(opendata, state);
985 if (ret == -ESTALE) {
986 /* Invalidate the state owner so we don't ever use it again */
987 nfs4_drop_state_owner(state->owner);
988 d_drop(ctx->path.dentry);
990 nfs4_opendata_put(opendata);
994 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
996 struct nfs_server *server = NFS_SERVER(state->inode);
997 struct nfs4_exception exception = { };
1001 err = _nfs4_open_expired(ctx, state);
1002 if (err == -NFS4ERR_DELAY)
1003 nfs4_handle_exception(server, err, &exception);
1004 } while (exception.retry);
1008 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1010 struct nfs_open_context *ctx;
1013 ctx = nfs4_state_find_open_context(state);
1015 return PTR_ERR(ctx);
1016 ret = nfs4_do_open_expired(ctx, state);
1017 put_nfs_open_context(ctx);
1022 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1023 * fields corresponding to attributes that were used to store the verifier.
1024 * Make sure we clobber those fields in the later setattr call
1026 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1028 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1029 !(sattr->ia_valid & ATTR_ATIME_SET))
1030 sattr->ia_valid |= ATTR_ATIME;
1032 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1033 !(sattr->ia_valid & ATTR_MTIME_SET))
1034 sattr->ia_valid |= ATTR_MTIME;
1038 * Returns a referenced nfs4_state
1040 static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1042 struct nfs4_state_owner *sp;
1043 struct nfs4_state *state = NULL;
1044 struct nfs_server *server = NFS_SERVER(dir);
1045 struct nfs_client *clp = server->nfs_client;
1046 struct nfs4_opendata *opendata;
1049 /* Protect against reboot recovery conflicts */
1051 if (!(sp = nfs4_get_state_owner(server, cred))) {
1052 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1055 status = nfs4_recover_expired_lease(server);
1057 goto err_put_state_owner;
1058 if (path->dentry->d_inode != NULL)
1059 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
1060 down_read(&clp->cl_sem);
1062 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
1063 if (opendata == NULL)
1064 goto err_release_rwsem;
1066 if (path->dentry->d_inode != NULL)
1067 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1069 status = _nfs4_proc_open(opendata);
1071 goto err_opendata_put;
1073 if (opendata->o_arg.open_flags & O_EXCL)
1074 nfs4_exclusive_attrset(opendata, sattr);
1076 state = nfs4_opendata_to_nfs4_state(opendata);
1077 status = PTR_ERR(state);
1079 goto err_opendata_put;
1080 nfs4_opendata_put(opendata);
1081 nfs4_put_state_owner(sp);
1082 up_read(&clp->cl_sem);
1086 nfs4_opendata_put(opendata);
1088 up_read(&clp->cl_sem);
1089 err_put_state_owner:
1090 nfs4_put_state_owner(sp);
1097 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1099 struct nfs4_exception exception = { };
1100 struct nfs4_state *res;
1104 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1107 /* NOTE: BAD_SEQID means the server and client disagree about the
1108 * book-keeping w.r.t. state-changing operations
1109 * (OPEN/CLOSE/LOCK/LOCKU...)
1110 * It is actually a sign of a bug on the client or on the server.
1112 * If we receive a BAD_SEQID error in the particular case of
1113 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1114 * have unhashed the old state_owner for us, and that we can
1115 * therefore safely retry using a new one. We should still warn
1116 * the user though...
1118 if (status == -NFS4ERR_BAD_SEQID) {
1119 printk(KERN_WARNING "NFS: v4 server %s "
1120 " returned a bad sequence-id error!\n",
1121 NFS_SERVER(dir)->nfs_client->cl_hostname);
1122 exception.retry = 1;
1126 * BAD_STATEID on OPEN means that the server cancelled our
1127 * state before it received the OPEN_CONFIRM.
1128 * Recover by retrying the request as per the discussion
1129 * on Page 181 of RFC3530.
1131 if (status == -NFS4ERR_BAD_STATEID) {
1132 exception.retry = 1;
1135 if (status == -EAGAIN) {
1136 /* We must have found a delegation */
1137 exception.retry = 1;
1140 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1141 status, &exception));
1142 } while (exception.retry);
1146 static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1147 struct iattr *sattr, struct nfs4_state *state)
1149 struct nfs_server *server = NFS_SERVER(inode);
1150 struct nfs_setattrargs arg = {
1151 .fh = NFS_FH(inode),
1154 .bitmask = server->attr_bitmask,
1156 struct nfs_setattrres res = {
1160 struct rpc_message msg = {
1161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1165 unsigned long timestamp = jiffies;
1168 nfs_fattr_init(fattr);
1170 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1171 /* Use that stateid */
1172 } else if (state != NULL) {
1173 msg.rpc_cred = state->owner->so_cred;
1174 nfs4_copy_stateid(&arg.stateid, state, current->files);
1176 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1178 status = rpc_call_sync(server->client, &msg, 0);
1179 if (status == 0 && state != NULL)
1180 renew_lease(server, timestamp);
1184 static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1185 struct iattr *sattr, struct nfs4_state *state)
1187 struct nfs_server *server = NFS_SERVER(inode);
1188 struct nfs4_exception exception = { };
1191 err = nfs4_handle_exception(server,
1192 _nfs4_do_setattr(inode, fattr, sattr, state),
1194 } while (exception.retry);
1198 struct nfs4_closedata {
1200 struct inode *inode;
1201 struct nfs4_state *state;
1202 struct nfs_closeargs arg;
1203 struct nfs_closeres res;
1204 struct nfs_fattr fattr;
1205 unsigned long timestamp;
1208 static void nfs4_free_closedata(void *data)
1210 struct nfs4_closedata *calldata = data;
1211 struct nfs4_state_owner *sp = calldata->state->owner;
1213 nfs4_put_open_state(calldata->state);
1214 nfs_free_seqid(calldata->arg.seqid);
1215 nfs4_put_state_owner(sp);
1216 dput(calldata->path.dentry);
1217 mntput(calldata->path.mnt);
1221 static void nfs4_close_done(struct rpc_task *task, void *data)
1223 struct nfs4_closedata *calldata = data;
1224 struct nfs4_state *state = calldata->state;
1225 struct nfs_server *server = NFS_SERVER(calldata->inode);
1227 if (RPC_ASSASSINATED(task))
1229 /* hmm. we are done with the inode, and in the process of freeing
1230 * the state_owner. we keep this around to process errors
1232 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1233 switch (task->tk_status) {
1235 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1236 renew_lease(server, calldata->timestamp);
1238 case -NFS4ERR_STALE_STATEID:
1239 case -NFS4ERR_EXPIRED:
1242 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1243 rpc_restart_call(task);
1247 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1250 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1252 struct nfs4_closedata *calldata = data;
1253 struct nfs4_state *state = calldata->state;
1254 int clear_rd, clear_wr, clear_rdwr;
1256 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1259 clear_rd = clear_wr = clear_rdwr = 0;
1260 spin_lock(&state->owner->so_lock);
1261 /* Calculate the change in open mode */
1262 if (state->n_rdwr == 0) {
1263 if (state->n_rdonly == 0) {
1264 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1265 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1267 if (state->n_wronly == 0) {
1268 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1269 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1272 spin_unlock(&state->owner->so_lock);
1273 if (!clear_rd && !clear_wr && !clear_rdwr) {
1274 /* Note: exit _without_ calling nfs4_close_done */
1275 task->tk_action = NULL;
1278 nfs_fattr_init(calldata->res.fattr);
1279 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1280 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1281 calldata->arg.open_flags = FMODE_READ;
1282 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1283 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1284 calldata->arg.open_flags = FMODE_WRITE;
1286 calldata->timestamp = jiffies;
1287 rpc_call_start(task);
1290 static const struct rpc_call_ops nfs4_close_ops = {
1291 .rpc_call_prepare = nfs4_close_prepare,
1292 .rpc_call_done = nfs4_close_done,
1293 .rpc_release = nfs4_free_closedata,
1297 * It is possible for data to be read/written from a mem-mapped file
1298 * after the sys_close call (which hits the vfs layer as a flush).
1299 * This means that we can't safely call nfsv4 close on a file until
1300 * the inode is cleared. This in turn means that we are not good
1301 * NFSv4 citizens - we do not indicate to the server to update the file's
1302 * share state even when we are done with one of the three share
1303 * stateid's in the inode.
1305 * NOTE: Caller must be holding the sp->so_owner semaphore!
1307 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1309 struct nfs_server *server = NFS_SERVER(state->inode);
1310 struct nfs4_closedata *calldata;
1311 struct nfs4_state_owner *sp = state->owner;
1312 struct rpc_task *task;
1313 struct rpc_message msg = {
1314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1315 .rpc_cred = state->owner->so_cred,
1317 struct rpc_task_setup task_setup_data = {
1318 .rpc_client = server->client,
1319 .rpc_message = &msg,
1320 .callback_ops = &nfs4_close_ops,
1321 .flags = RPC_TASK_ASYNC,
1323 int status = -ENOMEM;
1325 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1326 if (calldata == NULL)
1328 calldata->inode = state->inode;
1329 calldata->state = state;
1330 calldata->arg.fh = NFS_FH(state->inode);
1331 calldata->arg.stateid = &state->open_stateid;
1332 /* Serialization for the sequence id */
1333 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1334 if (calldata->arg.seqid == NULL)
1335 goto out_free_calldata;
1336 calldata->arg.bitmask = server->attr_bitmask;
1337 calldata->res.fattr = &calldata->fattr;
1338 calldata->res.server = server;
1339 calldata->path.mnt = mntget(path->mnt);
1340 calldata->path.dentry = dget(path->dentry);
1342 msg.rpc_argp = &calldata->arg,
1343 msg.rpc_resp = &calldata->res,
1344 task_setup_data.callback_data = calldata;
1345 task = rpc_run_task(&task_setup_data);
1347 return PTR_ERR(task);
1350 status = rpc_wait_for_completion_task(task);
1356 nfs4_put_open_state(state);
1357 nfs4_put_state_owner(sp);
1361 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
1366 /* If the open_intent is for execute, we have an extra check to make */
1367 if (nd->intent.open.flags & FMODE_EXEC) {
1368 ret = nfs_may_open(state->inode,
1369 state->owner->so_cred,
1370 nd->intent.open.flags);
1374 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1375 if (!IS_ERR(filp)) {
1376 struct nfs_open_context *ctx;
1377 ctx = nfs_file_open_context(filp);
1381 ret = PTR_ERR(filp);
1383 nfs4_close_sync(path, state, nd->intent.open.flags);
1388 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1390 struct dentry *parent;
1391 struct path path = {
1396 struct rpc_cred *cred;
1397 struct nfs4_state *state;
1400 if (nd->flags & LOOKUP_CREATE) {
1401 attr.ia_mode = nd->intent.open.create_mode;
1402 attr.ia_valid = ATTR_MODE;
1403 if (!IS_POSIXACL(dir))
1404 attr.ia_mode &= ~current->fs->umask;
1407 BUG_ON(nd->intent.open.flags & O_CREAT);
1410 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1412 return (struct dentry *)cred;
1413 parent = dentry->d_parent;
1414 /* Protect against concurrent sillydeletes */
1415 nfs_block_sillyrename(parent);
1416 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1418 if (IS_ERR(state)) {
1419 if (PTR_ERR(state) == -ENOENT) {
1420 d_add(dentry, NULL);
1421 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1423 nfs_unblock_sillyrename(parent);
1424 return (struct dentry *)state;
1426 res = d_add_unique(dentry, igrab(state->inode));
1429 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1430 nfs_unblock_sillyrename(parent);
1431 nfs4_intent_set_file(nd, &path, state);
1436 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1438 struct path path = {
1442 struct rpc_cred *cred;
1443 struct nfs4_state *state;
1445 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1447 return PTR_ERR(cred);
1448 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1450 if (IS_ERR(state)) {
1451 switch (PTR_ERR(state)) {
1457 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1463 if (state->inode == dentry->d_inode) {
1464 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1465 nfs4_intent_set_file(nd, &path, state);
1468 nfs4_close_sync(&path, state, openflags);
1475 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1477 struct nfs4_server_caps_res res = {};
1478 struct rpc_message msg = {
1479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1480 .rpc_argp = fhandle,
1485 status = rpc_call_sync(server->client, &msg, 0);
1487 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1488 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1489 server->caps |= NFS_CAP_ACLS;
1490 if (res.has_links != 0)
1491 server->caps |= NFS_CAP_HARDLINKS;
1492 if (res.has_symlinks != 0)
1493 server->caps |= NFS_CAP_SYMLINKS;
1494 server->acl_bitmask = res.acl_bitmask;
1499 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1501 struct nfs4_exception exception = { };
1504 err = nfs4_handle_exception(server,
1505 _nfs4_server_capabilities(server, fhandle),
1507 } while (exception.retry);
1511 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1512 struct nfs_fsinfo *info)
1514 struct nfs4_lookup_root_arg args = {
1515 .bitmask = nfs4_fattr_bitmap,
1517 struct nfs4_lookup_res res = {
1519 .fattr = info->fattr,
1522 struct rpc_message msg = {
1523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1527 nfs_fattr_init(info->fattr);
1528 return rpc_call_sync(server->client, &msg, 0);
1531 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1532 struct nfs_fsinfo *info)
1534 struct nfs4_exception exception = { };
1537 err = nfs4_handle_exception(server,
1538 _nfs4_lookup_root(server, fhandle, info),
1540 } while (exception.retry);
1545 * get the file handle for the "/" directory on the server
1547 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1548 struct nfs_fsinfo *info)
1552 status = nfs4_lookup_root(server, fhandle, info);
1554 status = nfs4_server_capabilities(server, fhandle);
1556 status = nfs4_do_fsinfo(server, fhandle, info);
1557 return nfs4_map_errors(status);
1561 * Get locations and (maybe) other attributes of a referral.
1562 * Note that we'll actually follow the referral later when
1563 * we detect fsid mismatch in inode revalidation
1565 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1567 int status = -ENOMEM;
1568 struct page *page = NULL;
1569 struct nfs4_fs_locations *locations = NULL;
1571 page = alloc_page(GFP_KERNEL);
1574 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1575 if (locations == NULL)
1578 status = nfs4_proc_fs_locations(dir, name, locations, page);
1581 /* Make sure server returned a different fsid for the referral */
1582 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1583 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1588 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1589 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1591 fattr->mode = S_IFDIR;
1592 memset(fhandle, 0, sizeof(struct nfs_fh));
1601 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1603 struct nfs4_getattr_arg args = {
1605 .bitmask = server->attr_bitmask,
1607 struct nfs4_getattr_res res = {
1611 struct rpc_message msg = {
1612 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1617 nfs_fattr_init(fattr);
1618 return rpc_call_sync(server->client, &msg, 0);
1621 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1623 struct nfs4_exception exception = { };
1626 err = nfs4_handle_exception(server,
1627 _nfs4_proc_getattr(server, fhandle, fattr),
1629 } while (exception.retry);
1634 * The file is not closed if it is opened due to the a request to change
1635 * the size of the file. The open call will not be needed once the
1636 * VFS layer lookup-intents are implemented.
1638 * Close is called when the inode is destroyed.
1639 * If we haven't opened the file for O_WRONLY, we
1640 * need to in the size_change case to obtain a stateid.
1643 * Because OPEN is always done by name in nfsv4, it is
1644 * possible that we opened a different file by the same
1645 * name. We can recognize this race condition, but we
1646 * can't do anything about it besides returning an error.
1648 * This will be fixed with VFS changes (lookup-intent).
1651 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1652 struct iattr *sattr)
1654 struct rpc_cred *cred;
1655 struct inode *inode = dentry->d_inode;
1656 struct nfs_open_context *ctx;
1657 struct nfs4_state *state = NULL;
1660 nfs_fattr_init(fattr);
1662 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
1664 return PTR_ERR(cred);
1666 /* Search for an existing open(O_WRITE) file */
1667 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1671 status = nfs4_do_setattr(inode, fattr, sattr, state);
1673 nfs_setattr_update_inode(inode, sattr);
1675 put_nfs_open_context(ctx);
1680 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1681 const struct qstr *name, struct nfs_fh *fhandle,
1682 struct nfs_fattr *fattr)
1685 struct nfs4_lookup_arg args = {
1686 .bitmask = server->attr_bitmask,
1690 struct nfs4_lookup_res res = {
1695 struct rpc_message msg = {
1696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1701 nfs_fattr_init(fattr);
1703 dprintk("NFS call lookupfh %s\n", name->name);
1704 status = rpc_call_sync(server->client, &msg, 0);
1705 dprintk("NFS reply lookupfh: %d\n", status);
1709 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1710 struct qstr *name, struct nfs_fh *fhandle,
1711 struct nfs_fattr *fattr)
1713 struct nfs4_exception exception = { };
1716 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1718 if (err == -NFS4ERR_MOVED) {
1722 err = nfs4_handle_exception(server, err, &exception);
1723 } while (exception.retry);
1727 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1728 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1732 dprintk("NFS call lookup %s\n", name->name);
1733 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
1734 if (status == -NFS4ERR_MOVED)
1735 status = nfs4_get_referral(dir, name, fattr, fhandle);
1736 dprintk("NFS reply lookup: %d\n", status);
1740 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1742 struct nfs4_exception exception = { };
1745 err = nfs4_handle_exception(NFS_SERVER(dir),
1746 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1748 } while (exception.retry);
1752 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1754 struct nfs_server *server = NFS_SERVER(inode);
1755 struct nfs_fattr fattr;
1756 struct nfs4_accessargs args = {
1757 .fh = NFS_FH(inode),
1758 .bitmask = server->attr_bitmask,
1760 struct nfs4_accessres res = {
1764 struct rpc_message msg = {
1765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1768 .rpc_cred = entry->cred,
1770 int mode = entry->mask;
1774 * Determine which access bits we want to ask for...
1776 if (mode & MAY_READ)
1777 args.access |= NFS4_ACCESS_READ;
1778 if (S_ISDIR(inode->i_mode)) {
1779 if (mode & MAY_WRITE)
1780 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1781 if (mode & MAY_EXEC)
1782 args.access |= NFS4_ACCESS_LOOKUP;
1784 if (mode & MAY_WRITE)
1785 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1786 if (mode & MAY_EXEC)
1787 args.access |= NFS4_ACCESS_EXECUTE;
1789 nfs_fattr_init(&fattr);
1790 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1793 if (res.access & NFS4_ACCESS_READ)
1794 entry->mask |= MAY_READ;
1795 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1796 entry->mask |= MAY_WRITE;
1797 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1798 entry->mask |= MAY_EXEC;
1799 nfs_refresh_inode(inode, &fattr);
1804 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1806 struct nfs4_exception exception = { };
1809 err = nfs4_handle_exception(NFS_SERVER(inode),
1810 _nfs4_proc_access(inode, entry),
1812 } while (exception.retry);
1817 * TODO: For the time being, we don't try to get any attributes
1818 * along with any of the zero-copy operations READ, READDIR,
1821 * In the case of the first three, we want to put the GETATTR
1822 * after the read-type operation -- this is because it is hard
1823 * to predict the length of a GETATTR response in v4, and thus
1824 * align the READ data correctly. This means that the GETATTR
1825 * may end up partially falling into the page cache, and we should
1826 * shift it into the 'tail' of the xdr_buf before processing.
1827 * To do this efficiently, we need to know the total length
1828 * of data received, which doesn't seem to be available outside
1831 * In the case of WRITE, we also want to put the GETATTR after
1832 * the operation -- in this case because we want to make sure
1833 * we get the post-operation mtime and size. This means that
1834 * we can't use xdr_encode_pages() as written: we need a variant
1835 * of it which would leave room in the 'tail' iovec.
1837 * Both of these changes to the XDR layer would in fact be quite
1838 * minor, but I decided to leave them for a subsequent patch.
1840 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1841 unsigned int pgbase, unsigned int pglen)
1843 struct nfs4_readlink args = {
1844 .fh = NFS_FH(inode),
1849 struct rpc_message msg = {
1850 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1855 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1858 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1859 unsigned int pgbase, unsigned int pglen)
1861 struct nfs4_exception exception = { };
1864 err = nfs4_handle_exception(NFS_SERVER(inode),
1865 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1867 } while (exception.retry);
1873 * We will need to arrange for the VFS layer to provide an atomic open.
1874 * Until then, this create/open method is prone to inefficiency and race
1875 * conditions due to the lookup, create, and open VFS calls from sys_open()
1876 * placed on the wire.
1878 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1879 * The file will be opened again in the subsequent VFS open call
1880 * (nfs4_proc_file_open).
1882 * The open for read will just hang around to be used by any process that
1883 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1887 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1888 int flags, struct nameidata *nd)
1890 struct path path = {
1894 struct nfs4_state *state;
1895 struct rpc_cred *cred;
1898 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1900 status = PTR_ERR(cred);
1903 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1906 if (IS_ERR(state)) {
1907 status = PTR_ERR(state);
1910 d_add(dentry, igrab(state->inode));
1911 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1912 if (flags & O_EXCL) {
1913 struct nfs_fattr fattr;
1914 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
1916 nfs_setattr_update_inode(state->inode, sattr);
1917 nfs_post_op_update_inode(state->inode, &fattr);
1919 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
1920 status = nfs4_intent_set_file(nd, &path, state);
1922 nfs4_close_sync(&path, state, flags);
1927 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1929 struct nfs_server *server = NFS_SERVER(dir);
1930 struct nfs_removeargs args = {
1932 .name.len = name->len,
1933 .name.name = name->name,
1934 .bitmask = server->attr_bitmask,
1936 struct nfs_removeres res = {
1939 struct rpc_message msg = {
1940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1946 nfs_fattr_init(&res.dir_attr);
1947 status = rpc_call_sync(server->client, &msg, 0);
1949 update_changeattr(dir, &res.cinfo);
1950 nfs_post_op_update_inode(dir, &res.dir_attr);
1955 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1957 struct nfs4_exception exception = { };
1960 err = nfs4_handle_exception(NFS_SERVER(dir),
1961 _nfs4_proc_remove(dir, name),
1963 } while (exception.retry);
1967 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1969 struct nfs_server *server = NFS_SERVER(dir);
1970 struct nfs_removeargs *args = msg->rpc_argp;
1971 struct nfs_removeres *res = msg->rpc_resp;
1973 args->bitmask = server->attr_bitmask;
1974 res->server = server;
1975 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1978 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1980 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1982 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1984 update_changeattr(dir, &res->cinfo);
1985 nfs_post_op_update_inode(dir, &res->dir_attr);
1989 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1990 struct inode *new_dir, struct qstr *new_name)
1992 struct nfs_server *server = NFS_SERVER(old_dir);
1993 struct nfs4_rename_arg arg = {
1994 .old_dir = NFS_FH(old_dir),
1995 .new_dir = NFS_FH(new_dir),
1996 .old_name = old_name,
1997 .new_name = new_name,
1998 .bitmask = server->attr_bitmask,
2000 struct nfs_fattr old_fattr, new_fattr;
2001 struct nfs4_rename_res res = {
2003 .old_fattr = &old_fattr,
2004 .new_fattr = &new_fattr,
2006 struct rpc_message msg = {
2007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2013 nfs_fattr_init(res.old_fattr);
2014 nfs_fattr_init(res.new_fattr);
2015 status = rpc_call_sync(server->client, &msg, 0);
2018 update_changeattr(old_dir, &res.old_cinfo);
2019 nfs_post_op_update_inode(old_dir, res.old_fattr);
2020 update_changeattr(new_dir, &res.new_cinfo);
2021 nfs_post_op_update_inode(new_dir, res.new_fattr);
2026 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2027 struct inode *new_dir, struct qstr *new_name)
2029 struct nfs4_exception exception = { };
2032 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2033 _nfs4_proc_rename(old_dir, old_name,
2036 } while (exception.retry);
2040 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2042 struct nfs_server *server = NFS_SERVER(inode);
2043 struct nfs4_link_arg arg = {
2044 .fh = NFS_FH(inode),
2045 .dir_fh = NFS_FH(dir),
2047 .bitmask = server->attr_bitmask,
2049 struct nfs_fattr fattr, dir_attr;
2050 struct nfs4_link_res res = {
2053 .dir_attr = &dir_attr,
2055 struct rpc_message msg = {
2056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2062 nfs_fattr_init(res.fattr);
2063 nfs_fattr_init(res.dir_attr);
2064 status = rpc_call_sync(server->client, &msg, 0);
2066 update_changeattr(dir, &res.cinfo);
2067 nfs_post_op_update_inode(dir, res.dir_attr);
2068 nfs_post_op_update_inode(inode, res.fattr);
2074 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2076 struct nfs4_exception exception = { };
2079 err = nfs4_handle_exception(NFS_SERVER(inode),
2080 _nfs4_proc_link(inode, dir, name),
2082 } while (exception.retry);
2086 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2087 struct page *page, unsigned int len, struct iattr *sattr)
2089 struct nfs_server *server = NFS_SERVER(dir);
2090 struct nfs_fh fhandle;
2091 struct nfs_fattr fattr, dir_fattr;
2092 struct nfs4_create_arg arg = {
2093 .dir_fh = NFS_FH(dir),
2095 .name = &dentry->d_name,
2098 .bitmask = server->attr_bitmask,
2100 struct nfs4_create_res res = {
2104 .dir_fattr = &dir_fattr,
2106 struct rpc_message msg = {
2107 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2113 if (len > NFS4_MAXPATHLEN)
2114 return -ENAMETOOLONG;
2116 arg.u.symlink.pages = &page;
2117 arg.u.symlink.len = len;
2118 nfs_fattr_init(&fattr);
2119 nfs_fattr_init(&dir_fattr);
2121 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2123 update_changeattr(dir, &res.dir_cinfo);
2124 nfs_post_op_update_inode(dir, res.dir_fattr);
2125 status = nfs_instantiate(dentry, &fhandle, &fattr);
2130 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2131 struct page *page, unsigned int len, struct iattr *sattr)
2133 struct nfs4_exception exception = { };
2136 err = nfs4_handle_exception(NFS_SERVER(dir),
2137 _nfs4_proc_symlink(dir, dentry, page,
2140 } while (exception.retry);
2144 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2145 struct iattr *sattr)
2147 struct nfs_server *server = NFS_SERVER(dir);
2148 struct nfs_fh fhandle;
2149 struct nfs_fattr fattr, dir_fattr;
2150 struct nfs4_create_arg arg = {
2151 .dir_fh = NFS_FH(dir),
2153 .name = &dentry->d_name,
2156 .bitmask = server->attr_bitmask,
2158 struct nfs4_create_res res = {
2162 .dir_fattr = &dir_fattr,
2164 struct rpc_message msg = {
2165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2171 nfs_fattr_init(&fattr);
2172 nfs_fattr_init(&dir_fattr);
2174 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2176 update_changeattr(dir, &res.dir_cinfo);
2177 nfs_post_op_update_inode(dir, res.dir_fattr);
2178 status = nfs_instantiate(dentry, &fhandle, &fattr);
2183 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2184 struct iattr *sattr)
2186 struct nfs4_exception exception = { };
2189 err = nfs4_handle_exception(NFS_SERVER(dir),
2190 _nfs4_proc_mkdir(dir, dentry, sattr),
2192 } while (exception.retry);
2196 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2197 u64 cookie, struct page *page, unsigned int count, int plus)
2199 struct inode *dir = dentry->d_inode;
2200 struct nfs4_readdir_arg args = {
2205 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2207 struct nfs4_readdir_res res;
2208 struct rpc_message msg = {
2209 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2216 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2217 dentry->d_parent->d_name.name,
2218 dentry->d_name.name,
2219 (unsigned long long)cookie);
2220 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2221 res.pgbase = args.pgbase;
2222 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2224 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2226 nfs_invalidate_atime(dir);
2228 dprintk("%s: returns %d\n", __FUNCTION__, status);
2232 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2233 u64 cookie, struct page *page, unsigned int count, int plus)
2235 struct nfs4_exception exception = { };
2238 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2239 _nfs4_proc_readdir(dentry, cred, cookie,
2242 } while (exception.retry);
2246 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2247 struct iattr *sattr, dev_t rdev)
2249 struct nfs_server *server = NFS_SERVER(dir);
2251 struct nfs_fattr fattr, dir_fattr;
2252 struct nfs4_create_arg arg = {
2253 .dir_fh = NFS_FH(dir),
2255 .name = &dentry->d_name,
2257 .bitmask = server->attr_bitmask,
2259 struct nfs4_create_res res = {
2263 .dir_fattr = &dir_fattr,
2265 struct rpc_message msg = {
2266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2271 int mode = sattr->ia_mode;
2273 nfs_fattr_init(&fattr);
2274 nfs_fattr_init(&dir_fattr);
2276 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2277 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2279 arg.ftype = NF4FIFO;
2280 else if (S_ISBLK(mode)) {
2282 arg.u.device.specdata1 = MAJOR(rdev);
2283 arg.u.device.specdata2 = MINOR(rdev);
2285 else if (S_ISCHR(mode)) {
2287 arg.u.device.specdata1 = MAJOR(rdev);
2288 arg.u.device.specdata2 = MINOR(rdev);
2291 arg.ftype = NF4SOCK;
2293 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2295 update_changeattr(dir, &res.dir_cinfo);
2296 nfs_post_op_update_inode(dir, res.dir_fattr);
2297 status = nfs_instantiate(dentry, &fh, &fattr);
2302 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2303 struct iattr *sattr, dev_t rdev)
2305 struct nfs4_exception exception = { };
2308 err = nfs4_handle_exception(NFS_SERVER(dir),
2309 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2311 } while (exception.retry);
2315 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2316 struct nfs_fsstat *fsstat)
2318 struct nfs4_statfs_arg args = {
2320 .bitmask = server->attr_bitmask,
2322 struct rpc_message msg = {
2323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2328 nfs_fattr_init(fsstat->fattr);
2329 return rpc_call_sync(server->client, &msg, 0);
2332 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2334 struct nfs4_exception exception = { };
2337 err = nfs4_handle_exception(server,
2338 _nfs4_proc_statfs(server, fhandle, fsstat),
2340 } while (exception.retry);
2344 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2345 struct nfs_fsinfo *fsinfo)
2347 struct nfs4_fsinfo_arg args = {
2349 .bitmask = server->attr_bitmask,
2351 struct rpc_message msg = {
2352 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2357 return rpc_call_sync(server->client, &msg, 0);
2360 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2362 struct nfs4_exception exception = { };
2366 err = nfs4_handle_exception(server,
2367 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2369 } while (exception.retry);
2373 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2375 nfs_fattr_init(fsinfo->fattr);
2376 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2379 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2380 struct nfs_pathconf *pathconf)
2382 struct nfs4_pathconf_arg args = {
2384 .bitmask = server->attr_bitmask,
2386 struct rpc_message msg = {
2387 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2389 .rpc_resp = pathconf,
2392 /* None of the pathconf attributes are mandatory to implement */
2393 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2394 memset(pathconf, 0, sizeof(*pathconf));
2398 nfs_fattr_init(pathconf->fattr);
2399 return rpc_call_sync(server->client, &msg, 0);
2402 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2403 struct nfs_pathconf *pathconf)
2405 struct nfs4_exception exception = { };
2409 err = nfs4_handle_exception(server,
2410 _nfs4_proc_pathconf(server, fhandle, pathconf),
2412 } while (exception.retry);
2416 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2418 struct nfs_server *server = NFS_SERVER(data->inode);
2420 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
2421 rpc_restart_call(task);
2425 nfs_invalidate_atime(data->inode);
2426 if (task->tk_status > 0)
2427 renew_lease(server, data->timestamp);
2431 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2433 data->timestamp = jiffies;
2434 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2437 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2439 struct inode *inode = data->inode;
2441 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2442 rpc_restart_call(task);
2445 if (task->tk_status >= 0) {
2446 renew_lease(NFS_SERVER(inode), data->timestamp);
2447 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2452 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
2454 struct nfs_server *server = NFS_SERVER(data->inode);
2456 data->args.bitmask = server->attr_bitmask;
2457 data->res.server = server;
2458 data->timestamp = jiffies;
2460 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
2463 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2465 struct inode *inode = data->inode;
2467 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2468 rpc_restart_call(task);
2471 nfs_refresh_inode(inode, data->res.fattr);
2475 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
2477 struct nfs_server *server = NFS_SERVER(data->inode);
2479 data->args.bitmask = server->attr_bitmask;
2480 data->res.server = server;
2481 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
2485 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2486 * standalone procedure for queueing an asynchronous RENEW.
2488 static void nfs4_renew_done(struct rpc_task *task, void *data)
2490 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2491 unsigned long timestamp = (unsigned long)data;
2493 if (task->tk_status < 0) {
2494 switch (task->tk_status) {
2495 case -NFS4ERR_STALE_CLIENTID:
2496 case -NFS4ERR_EXPIRED:
2497 case -NFS4ERR_CB_PATH_DOWN:
2498 nfs4_schedule_state_recovery(clp);
2502 spin_lock(&clp->cl_lock);
2503 if (time_before(clp->cl_last_renewal,timestamp))
2504 clp->cl_last_renewal = timestamp;
2505 spin_unlock(&clp->cl_lock);
2508 static const struct rpc_call_ops nfs4_renew_ops = {
2509 .rpc_call_done = nfs4_renew_done,
2512 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2514 struct rpc_message msg = {
2515 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2520 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2521 &nfs4_renew_ops, (void *)jiffies);
2524 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2526 struct rpc_message msg = {
2527 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2531 unsigned long now = jiffies;
2534 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2537 spin_lock(&clp->cl_lock);
2538 if (time_before(clp->cl_last_renewal,now))
2539 clp->cl_last_renewal = now;
2540 spin_unlock(&clp->cl_lock);
2544 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2546 return (server->caps & NFS_CAP_ACLS)
2547 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2548 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2551 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2552 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2555 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2557 static void buf_to_pages(const void *buf, size_t buflen,
2558 struct page **pages, unsigned int *pgbase)
2560 const void *p = buf;
2562 *pgbase = offset_in_page(buf);
2564 while (p < buf + buflen) {
2565 *(pages++) = virt_to_page(p);
2566 p += PAGE_CACHE_SIZE;
2570 struct nfs4_cached_acl {
2576 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2578 struct nfs_inode *nfsi = NFS_I(inode);
2580 spin_lock(&inode->i_lock);
2581 kfree(nfsi->nfs4_acl);
2582 nfsi->nfs4_acl = acl;
2583 spin_unlock(&inode->i_lock);
2586 static void nfs4_zap_acl_attr(struct inode *inode)
2588 nfs4_set_cached_acl(inode, NULL);
2591 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2593 struct nfs_inode *nfsi = NFS_I(inode);
2594 struct nfs4_cached_acl *acl;
2597 spin_lock(&inode->i_lock);
2598 acl = nfsi->nfs4_acl;
2601 if (buf == NULL) /* user is just asking for length */
2603 if (acl->cached == 0)
2605 ret = -ERANGE; /* see getxattr(2) man page */
2606 if (acl->len > buflen)
2608 memcpy(buf, acl->data, acl->len);
2612 spin_unlock(&inode->i_lock);
2616 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2618 struct nfs4_cached_acl *acl;
2620 if (buf && acl_len <= PAGE_SIZE) {
2621 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2625 memcpy(acl->data, buf, acl_len);
2627 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2634 nfs4_set_cached_acl(inode, acl);
2637 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2639 struct page *pages[NFS4ACL_MAXPAGES];
2640 struct nfs_getaclargs args = {
2641 .fh = NFS_FH(inode),
2645 size_t resp_len = buflen;
2647 struct rpc_message msg = {
2648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2650 .rpc_resp = &resp_len,
2652 struct page *localpage = NULL;
2655 if (buflen < PAGE_SIZE) {
2656 /* As long as we're doing a round trip to the server anyway,
2657 * let's be prepared for a page of acl data. */
2658 localpage = alloc_page(GFP_KERNEL);
2659 resp_buf = page_address(localpage);
2660 if (localpage == NULL)
2662 args.acl_pages[0] = localpage;
2663 args.acl_pgbase = 0;
2664 resp_len = args.acl_len = PAGE_SIZE;
2667 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2669 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2672 if (resp_len > args.acl_len)
2673 nfs4_write_cached_acl(inode, NULL, resp_len);
2675 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2678 if (resp_len > buflen)
2681 memcpy(buf, resp_buf, resp_len);
2686 __free_page(localpage);
2690 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2692 struct nfs4_exception exception = { };
2695 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2698 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2699 } while (exception.retry);
2703 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2705 struct nfs_server *server = NFS_SERVER(inode);
2708 if (!nfs4_server_supports_acls(server))
2710 ret = nfs_revalidate_inode(server, inode);
2713 ret = nfs4_read_cached_acl(inode, buf, buflen);
2716 return nfs4_get_acl_uncached(inode, buf, buflen);
2719 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2721 struct nfs_server *server = NFS_SERVER(inode);
2722 struct page *pages[NFS4ACL_MAXPAGES];
2723 struct nfs_setaclargs arg = {
2724 .fh = NFS_FH(inode),
2728 struct rpc_message msg = {
2729 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2735 if (!nfs4_server_supports_acls(server))
2737 nfs_inode_return_delegation(inode);
2738 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2739 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2740 nfs_zap_caches(inode);
2744 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2746 struct nfs4_exception exception = { };
2749 err = nfs4_handle_exception(NFS_SERVER(inode),
2750 __nfs4_proc_set_acl(inode, buf, buflen),
2752 } while (exception.retry);
2757 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2759 struct nfs_client *clp = server->nfs_client;
2761 if (!clp || task->tk_status >= 0)
2763 switch(task->tk_status) {
2764 case -NFS4ERR_STALE_CLIENTID:
2765 case -NFS4ERR_STALE_STATEID:
2766 case -NFS4ERR_EXPIRED:
2767 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2768 nfs4_schedule_state_recovery(clp);
2769 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
2770 rpc_wake_up_task(task);
2771 task->tk_status = 0;
2773 case -NFS4ERR_DELAY:
2774 nfs_inc_server_stats((struct nfs_server *) server,
2776 case -NFS4ERR_GRACE:
2777 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2778 task->tk_status = 0;
2780 case -NFS4ERR_OLD_STATEID:
2781 task->tk_status = 0;
2784 task->tk_status = nfs4_map_errors(task->tk_status);
2788 static int nfs4_wait_bit_interruptible(void *word)
2790 if (signal_pending(current))
2791 return -ERESTARTSYS;
2796 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
2803 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2805 rpc_clnt_sigmask(clnt, &oldset);
2806 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2807 nfs4_wait_bit_interruptible,
2808 TASK_INTERRUPTIBLE);
2809 rpc_clnt_sigunmask(clnt, &oldset);
2811 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
2815 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2823 *timeout = NFS4_POLL_RETRY_MIN;
2824 if (*timeout > NFS4_POLL_RETRY_MAX)
2825 *timeout = NFS4_POLL_RETRY_MAX;
2826 rpc_clnt_sigmask(clnt, &oldset);
2827 if (clnt->cl_intr) {
2828 schedule_timeout_interruptible(*timeout);
2832 schedule_timeout_uninterruptible(*timeout);
2833 rpc_clnt_sigunmask(clnt, &oldset);
2838 /* This is the error handling routine for processes that are allowed
2841 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2843 struct nfs_client *clp = server->nfs_client;
2844 int ret = errorcode;
2846 exception->retry = 0;
2850 case -NFS4ERR_STALE_CLIENTID:
2851 case -NFS4ERR_STALE_STATEID:
2852 case -NFS4ERR_EXPIRED:
2853 nfs4_schedule_state_recovery(clp);
2854 ret = nfs4_wait_clnt_recover(server->client, clp);
2856 exception->retry = 1;
2858 case -NFS4ERR_FILE_OPEN:
2859 case -NFS4ERR_GRACE:
2860 case -NFS4ERR_DELAY:
2861 ret = nfs4_delay(server->client, &exception->timeout);
2864 case -NFS4ERR_OLD_STATEID:
2865 exception->retry = 1;
2867 /* We failed to handle the error */
2868 return nfs4_map_errors(ret);
2871 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2873 nfs4_verifier sc_verifier;
2874 struct nfs4_setclientid setclientid = {
2875 .sc_verifier = &sc_verifier,
2878 struct rpc_message msg = {
2879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2880 .rpc_argp = &setclientid,
2888 p = (__be32*)sc_verifier.data;
2889 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2890 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2893 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2894 sizeof(setclientid.sc_name), "%s/%s %s %u",
2896 rpc_peeraddr2str(clp->cl_rpcclient,
2898 cred->cr_ops->cr_name,
2899 clp->cl_id_uniquifier);
2900 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2901 sizeof(setclientid.sc_netid),
2902 rpc_peeraddr2str(clp->cl_rpcclient,
2903 RPC_DISPLAY_NETID));
2904 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2905 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
2906 clp->cl_ipaddr, port >> 8, port & 255);
2908 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2909 if (status != -NFS4ERR_CLID_INUSE)
2914 ssleep(clp->cl_lease_time + 1);
2916 if (++clp->cl_id_uniquifier == 0)
2922 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2924 struct nfs_fsinfo fsinfo;
2925 struct rpc_message msg = {
2926 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2928 .rpc_resp = &fsinfo,
2935 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2937 spin_lock(&clp->cl_lock);
2938 clp->cl_lease_time = fsinfo.lease_time * HZ;
2939 clp->cl_last_renewal = now;
2940 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
2941 spin_unlock(&clp->cl_lock);
2946 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2951 err = _nfs4_proc_setclientid_confirm(clp, cred);
2955 case -NFS4ERR_RESOURCE:
2956 /* The IBM lawyers misread another document! */
2957 case -NFS4ERR_DELAY:
2958 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2964 struct nfs4_delegreturndata {
2965 struct nfs4_delegreturnargs args;
2966 struct nfs4_delegreturnres res;
2968 nfs4_stateid stateid;
2969 unsigned long timestamp;
2970 struct nfs_fattr fattr;
2974 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2976 struct nfs4_delegreturndata *data = calldata;
2977 data->rpc_status = task->tk_status;
2978 if (data->rpc_status == 0)
2979 renew_lease(data->res.server, data->timestamp);
2982 static void nfs4_delegreturn_release(void *calldata)
2987 static const struct rpc_call_ops nfs4_delegreturn_ops = {
2988 .rpc_call_done = nfs4_delegreturn_done,
2989 .rpc_release = nfs4_delegreturn_release,
2992 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2994 struct nfs4_delegreturndata *data;
2995 struct nfs_server *server = NFS_SERVER(inode);
2996 struct rpc_task *task;
2997 struct rpc_message msg = {
2998 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
3001 struct rpc_task_setup task_setup_data = {
3002 .rpc_client = server->client,
3003 .rpc_message = &msg,
3004 .callback_ops = &nfs4_delegreturn_ops,
3005 .flags = RPC_TASK_ASYNC,
3009 data = kmalloc(sizeof(*data), GFP_KERNEL);
3012 data->args.fhandle = &data->fh;
3013 data->args.stateid = &data->stateid;
3014 data->args.bitmask = server->attr_bitmask;
3015 nfs_copy_fh(&data->fh, NFS_FH(inode));
3016 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3017 data->res.fattr = &data->fattr;
3018 data->res.server = server;
3019 nfs_fattr_init(data->res.fattr);
3020 data->timestamp = jiffies;
3021 data->rpc_status = 0;
3023 task_setup_data.callback_data = data;
3024 msg.rpc_argp = &data->args,
3025 msg.rpc_resp = &data->res,
3026 task = rpc_run_task(&task_setup_data);
3028 return PTR_ERR(task);
3029 status = nfs4_wait_for_completion_rpc_task(task);
3031 status = data->rpc_status;
3033 nfs_refresh_inode(inode, &data->fattr);
3039 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3041 struct nfs_server *server = NFS_SERVER(inode);
3042 struct nfs4_exception exception = { };
3045 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3047 case -NFS4ERR_STALE_STATEID:
3048 case -NFS4ERR_EXPIRED:
3052 err = nfs4_handle_exception(server, err, &exception);
3053 } while (exception.retry);
3057 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3058 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3061 * sleep, with exponential backoff, and retry the LOCK operation.
3063 static unsigned long
3064 nfs4_set_lock_task_retry(unsigned long timeout)
3066 schedule_timeout_interruptible(timeout);
3068 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3069 return NFS4_LOCK_MAXTIMEOUT;
3073 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3075 struct inode *inode = state->inode;
3076 struct nfs_server *server = NFS_SERVER(inode);
3077 struct nfs_client *clp = server->nfs_client;
3078 struct nfs_lockt_args arg = {
3079 .fh = NFS_FH(inode),
3082 struct nfs_lockt_res res = {
3085 struct rpc_message msg = {
3086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3089 .rpc_cred = state->owner->so_cred,
3091 struct nfs4_lock_state *lsp;
3094 down_read(&clp->cl_sem);
3095 arg.lock_owner.clientid = clp->cl_clientid;
3096 status = nfs4_set_lock_state(state, request);
3099 lsp = request->fl_u.nfs4_fl.owner;
3100 arg.lock_owner.id = lsp->ls_id.id;
3101 status = rpc_call_sync(server->client, &msg, 0);
3104 request->fl_type = F_UNLCK;
3106 case -NFS4ERR_DENIED:
3109 request->fl_ops->fl_release_private(request);
3111 up_read(&clp->cl_sem);
3115 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3117 struct nfs4_exception exception = { };
3121 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3122 _nfs4_proc_getlk(state, cmd, request),
3124 } while (exception.retry);
3128 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3131 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3133 res = posix_lock_file_wait(file, fl);
3136 res = flock_lock_file_wait(file, fl);
3144 struct nfs4_unlockdata {
3145 struct nfs_locku_args arg;
3146 struct nfs_locku_res res;
3147 struct nfs4_lock_state *lsp;
3148 struct nfs_open_context *ctx;
3149 struct file_lock fl;
3150 const struct nfs_server *server;
3151 unsigned long timestamp;
3154 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3155 struct nfs_open_context *ctx,
3156 struct nfs4_lock_state *lsp,
3157 struct nfs_seqid *seqid)
3159 struct nfs4_unlockdata *p;
3160 struct inode *inode = lsp->ls_state->inode;
3162 p = kmalloc(sizeof(*p), GFP_KERNEL);
3165 p->arg.fh = NFS_FH(inode);
3167 p->arg.seqid = seqid;
3168 p->arg.stateid = &lsp->ls_stateid;
3170 atomic_inc(&lsp->ls_count);
3171 /* Ensure we don't close file until we're done freeing locks! */
3172 p->ctx = get_nfs_open_context(ctx);
3173 memcpy(&p->fl, fl, sizeof(p->fl));
3174 p->server = NFS_SERVER(inode);
3178 static void nfs4_locku_release_calldata(void *data)
3180 struct nfs4_unlockdata *calldata = data;
3181 nfs_free_seqid(calldata->arg.seqid);
3182 nfs4_put_lock_state(calldata->lsp);
3183 put_nfs_open_context(calldata->ctx);
3187 static void nfs4_locku_done(struct rpc_task *task, void *data)
3189 struct nfs4_unlockdata *calldata = data;
3191 if (RPC_ASSASSINATED(task))
3193 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
3194 switch (task->tk_status) {
3196 memcpy(calldata->lsp->ls_stateid.data,
3197 calldata->res.stateid.data,
3198 sizeof(calldata->lsp->ls_stateid.data));
3199 renew_lease(calldata->server, calldata->timestamp);
3201 case -NFS4ERR_STALE_STATEID:
3202 case -NFS4ERR_EXPIRED:
3205 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
3206 rpc_restart_call(task);
3210 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3212 struct nfs4_unlockdata *calldata = data;
3214 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3216 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3217 /* Note: exit _without_ running nfs4_locku_done */
3218 task->tk_action = NULL;
3221 calldata->timestamp = jiffies;
3222 rpc_call_start(task);
3225 static const struct rpc_call_ops nfs4_locku_ops = {
3226 .rpc_call_prepare = nfs4_locku_prepare,
3227 .rpc_call_done = nfs4_locku_done,
3228 .rpc_release = nfs4_locku_release_calldata,
3231 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3232 struct nfs_open_context *ctx,
3233 struct nfs4_lock_state *lsp,
3234 struct nfs_seqid *seqid)
3236 struct nfs4_unlockdata *data;
3237 struct rpc_message msg = {
3238 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3239 .rpc_cred = ctx->cred,
3241 struct rpc_task_setup task_setup_data = {
3242 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3243 .rpc_message = &msg,
3244 .callback_ops = &nfs4_locku_ops,
3245 .flags = RPC_TASK_ASYNC,
3248 /* Ensure this is an unlock - when canceling a lock, the
3249 * canceled lock is passed in, and it won't be an unlock.
3251 fl->fl_type = F_UNLCK;
3253 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3255 nfs_free_seqid(seqid);
3256 return ERR_PTR(-ENOMEM);
3259 msg.rpc_argp = &data->arg,
3260 msg.rpc_resp = &data->res,
3261 task_setup_data.callback_data = data;
3262 return rpc_run_task(&task_setup_data);
3265 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3267 struct nfs_seqid *seqid;
3268 struct nfs4_lock_state *lsp;
3269 struct rpc_task *task;
3272 status = nfs4_set_lock_state(state, request);
3273 /* Unlock _before_ we do the RPC call */
3274 request->fl_flags |= FL_EXISTS;
3275 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3279 /* Is this a delegated lock? */
3280 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3282 lsp = request->fl_u.nfs4_fl.owner;
3283 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3287 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3288 status = PTR_ERR(task);
3291 status = nfs4_wait_for_completion_rpc_task(task);
3297 struct nfs4_lockdata {
3298 struct nfs_lock_args arg;
3299 struct nfs_lock_res res;
3300 struct nfs4_lock_state *lsp;
3301 struct nfs_open_context *ctx;
3302 struct file_lock fl;
3303 unsigned long timestamp;
3308 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3309 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3311 struct nfs4_lockdata *p;
3312 struct inode *inode = lsp->ls_state->inode;
3313 struct nfs_server *server = NFS_SERVER(inode);
3315 p = kzalloc(sizeof(*p), GFP_KERNEL);
3319 p->arg.fh = NFS_FH(inode);
3321 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3322 if (p->arg.open_seqid == NULL)
3324 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3325 if (p->arg.lock_seqid == NULL)
3326 goto out_free_seqid;
3327 p->arg.lock_stateid = &lsp->ls_stateid;
3328 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3329 p->arg.lock_owner.id = lsp->ls_id.id;
3331 atomic_inc(&lsp->ls_count);
3332 p->ctx = get_nfs_open_context(ctx);
3333 memcpy(&p->fl, fl, sizeof(p->fl));
3336 nfs_free_seqid(p->arg.open_seqid);
3342 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3344 struct nfs4_lockdata *data = calldata;
3345 struct nfs4_state *state = data->lsp->ls_state;
3347 dprintk("%s: begin!\n", __FUNCTION__);
3348 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3350 /* Do we need to do an open_to_lock_owner? */
3351 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3352 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3354 data->arg.open_stateid = &state->stateid;
3355 data->arg.new_lock_owner = 1;
3357 data->arg.new_lock_owner = 0;
3358 data->timestamp = jiffies;
3359 rpc_call_start(task);
3360 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3363 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3365 struct nfs4_lockdata *data = calldata;
3367 dprintk("%s: begin!\n", __FUNCTION__);
3369 data->rpc_status = task->tk_status;
3370 if (RPC_ASSASSINATED(task))
3372 if (data->arg.new_lock_owner != 0) {
3373 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3374 if (data->rpc_status == 0)
3375 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3379 if (data->rpc_status == 0) {
3380 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3381 sizeof(data->lsp->ls_stateid.data));
3382 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3383 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3385 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3387 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3390 static void nfs4_lock_release(void *calldata)
3392 struct nfs4_lockdata *data = calldata;
3394 dprintk("%s: begin!\n", __FUNCTION__);
3395 nfs_free_seqid(data->arg.open_seqid);
3396 if (data->cancelled != 0) {
3397 struct rpc_task *task;
3398 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3399 data->arg.lock_seqid);
3402 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3404 nfs_free_seqid(data->arg.lock_seqid);
3405 nfs4_put_lock_state(data->lsp);
3406 put_nfs_open_context(data->ctx);
3408 dprintk("%s: done!\n", __FUNCTION__);
3411 static const struct rpc_call_ops nfs4_lock_ops = {
3412 .rpc_call_prepare = nfs4_lock_prepare,
3413 .rpc_call_done = nfs4_lock_done,
3414 .rpc_release = nfs4_lock_release,
3417 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3419 struct nfs4_lockdata *data;
3420 struct rpc_task *task;
3421 struct rpc_message msg = {
3422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3423 .rpc_cred = state->owner->so_cred,
3425 struct rpc_task_setup task_setup_data = {
3426 .rpc_client = NFS_CLIENT(state->inode),
3427 .rpc_message = &msg,
3428 .callback_ops = &nfs4_lock_ops,
3429 .flags = RPC_TASK_ASYNC,
3433 dprintk("%s: begin!\n", __FUNCTION__);
3434 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3435 fl->fl_u.nfs4_fl.owner);
3439 data->arg.block = 1;
3441 data->arg.reclaim = 1;
3442 msg.rpc_argp = &data->arg,
3443 msg.rpc_resp = &data->res,
3444 task_setup_data.callback_data = data;
3445 task = rpc_run_task(&task_setup_data);
3447 return PTR_ERR(task);
3448 ret = nfs4_wait_for_completion_rpc_task(task);
3450 ret = data->rpc_status;
3451 if (ret == -NFS4ERR_DENIED)
3454 data->cancelled = 1;
3456 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3460 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3462 struct nfs_server *server = NFS_SERVER(state->inode);
3463 struct nfs4_exception exception = { };
3467 /* Cache the lock if possible... */
3468 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3470 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3471 if (err != -NFS4ERR_DELAY)
3473 nfs4_handle_exception(server, err, &exception);
3474 } while (exception.retry);
3478 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3480 struct nfs_server *server = NFS_SERVER(state->inode);
3481 struct nfs4_exception exception = { };
3484 err = nfs4_set_lock_state(state, request);
3488 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3490 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3491 if (err != -NFS4ERR_DELAY)
3493 nfs4_handle_exception(server, err, &exception);
3494 } while (exception.retry);
3498 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3500 struct nfs_client *clp = state->owner->so_client;
3501 unsigned char fl_flags = request->fl_flags;
3504 /* Is this a delegated open? */
3505 status = nfs4_set_lock_state(state, request);
3508 request->fl_flags |= FL_ACCESS;
3509 status = do_vfs_lock(request->fl_file, request);
3512 down_read(&clp->cl_sem);
3513 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3514 struct nfs_inode *nfsi = NFS_I(state->inode);
3515 /* Yes: cache locks! */
3516 down_read(&nfsi->rwsem);
3517 /* ...but avoid races with delegation recall... */
3518 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3519 request->fl_flags = fl_flags & ~FL_SLEEP;
3520 status = do_vfs_lock(request->fl_file, request);
3521 up_read(&nfsi->rwsem);
3524 up_read(&nfsi->rwsem);
3526 status = _nfs4_do_setlk(state, cmd, request, 0);
3529 /* Note: we always want to sleep here! */
3530 request->fl_flags = fl_flags | FL_SLEEP;
3531 if (do_vfs_lock(request->fl_file, request) < 0)
3532 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3534 up_read(&clp->cl_sem);
3536 request->fl_flags = fl_flags;
3540 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3542 struct nfs4_exception exception = { };
3546 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3547 _nfs4_proc_setlk(state, cmd, request),
3549 } while (exception.retry);
3554 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3556 struct nfs_open_context *ctx;
3557 struct nfs4_state *state;
3558 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3561 /* verify open state */
3562 ctx = nfs_file_open_context(filp);
3565 if (request->fl_start < 0 || request->fl_end < 0)
3569 return nfs4_proc_getlk(state, F_GETLK, request);
3571 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3574 if (request->fl_type == F_UNLCK)
3575 return nfs4_proc_unlck(state, cmd, request);
3578 status = nfs4_proc_setlk(state, cmd, request);
3579 if ((status != -EAGAIN) || IS_SETLK(cmd))
3581 timeout = nfs4_set_lock_task_retry(timeout);
3582 status = -ERESTARTSYS;
3585 } while(status < 0);
3589 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3591 struct nfs_server *server = NFS_SERVER(state->inode);
3592 struct nfs4_exception exception = { };
3595 err = nfs4_set_lock_state(state, fl);
3599 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3600 if (err != -NFS4ERR_DELAY)
3602 err = nfs4_handle_exception(server, err, &exception);
3603 } while (exception.retry);
3608 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3610 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3611 size_t buflen, int flags)
3613 struct inode *inode = dentry->d_inode;
3615 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3618 if (!S_ISREG(inode->i_mode) &&
3619 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3622 return nfs4_proc_set_acl(inode, buf, buflen);
3625 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3626 * and that's what we'll do for e.g. user attributes that haven't been set.
3627 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3628 * attributes in kernel-managed attribute namespaces. */
3629 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3632 struct inode *inode = dentry->d_inode;
3634 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3637 return nfs4_proc_get_acl(inode, buf, buflen);
3640 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3642 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3644 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3646 if (buf && buflen < len)
3649 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3653 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
3654 struct nfs4_fs_locations *fs_locations, struct page *page)
3656 struct nfs_server *server = NFS_SERVER(dir);
3658 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3659 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3661 struct nfs4_fs_locations_arg args = {
3662 .dir_fh = NFS_FH(dir),
3667 struct rpc_message msg = {
3668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3670 .rpc_resp = fs_locations,
3674 dprintk("%s: start\n", __FUNCTION__);
3675 nfs_fattr_init(&fs_locations->fattr);
3676 fs_locations->server = server;
3677 fs_locations->nlocations = 0;
3678 status = rpc_call_sync(server->client, &msg, 0);
3679 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3683 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3684 .recover_open = nfs4_open_reclaim,
3685 .recover_lock = nfs4_lock_reclaim,
3688 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3689 .recover_open = nfs4_open_expired,
3690 .recover_lock = nfs4_lock_expired,
3693 static const struct inode_operations nfs4_file_inode_operations = {
3694 .permission = nfs_permission,
3695 .getattr = nfs_getattr,
3696 .setattr = nfs_setattr,
3697 .getxattr = nfs4_getxattr,
3698 .setxattr = nfs4_setxattr,
3699 .listxattr = nfs4_listxattr,
3702 const struct nfs_rpc_ops nfs_v4_clientops = {
3703 .version = 4, /* protocol version */
3704 .dentry_ops = &nfs4_dentry_operations,
3705 .dir_inode_ops = &nfs4_dir_inode_operations,
3706 .file_inode_ops = &nfs4_file_inode_operations,
3707 .getroot = nfs4_proc_get_root,
3708 .getattr = nfs4_proc_getattr,
3709 .setattr = nfs4_proc_setattr,
3710 .lookupfh = nfs4_proc_lookupfh,
3711 .lookup = nfs4_proc_lookup,
3712 .access = nfs4_proc_access,
3713 .readlink = nfs4_proc_readlink,
3714 .create = nfs4_proc_create,
3715 .remove = nfs4_proc_remove,
3716 .unlink_setup = nfs4_proc_unlink_setup,
3717 .unlink_done = nfs4_proc_unlink_done,
3718 .rename = nfs4_proc_rename,
3719 .link = nfs4_proc_link,
3720 .symlink = nfs4_proc_symlink,
3721 .mkdir = nfs4_proc_mkdir,
3722 .rmdir = nfs4_proc_remove,
3723 .readdir = nfs4_proc_readdir,
3724 .mknod = nfs4_proc_mknod,
3725 .statfs = nfs4_proc_statfs,
3726 .fsinfo = nfs4_proc_fsinfo,
3727 .pathconf = nfs4_proc_pathconf,
3728 .set_capabilities = nfs4_server_capabilities,
3729 .decode_dirent = nfs4_decode_dirent,
3730 .read_setup = nfs4_proc_read_setup,
3731 .read_done = nfs4_read_done,
3732 .write_setup = nfs4_proc_write_setup,
3733 .write_done = nfs4_write_done,
3734 .commit_setup = nfs4_proc_commit_setup,
3735 .commit_done = nfs4_commit_done,
3736 .file_open = nfs_open,
3737 .file_release = nfs_release,
3738 .lock = nfs4_proc_lock,
3739 .clear_acl_cache = nfs4_zap_acl_attr,