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 nfsi->cache_change_attribute = jiffies;
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)
321 ret = rpc_wait_for_completion_task(task);
325 static int can_open_cached(struct nfs4_state *state, int mode)
328 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
330 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
333 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
335 case FMODE_READ|FMODE_WRITE:
336 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
341 static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
343 if ((delegation->type & open_flags) != open_flags)
345 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
350 static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
352 switch (open_flags) {
359 case FMODE_READ|FMODE_WRITE:
362 nfs4_state_set_mode_locked(state, state->state | open_flags);
365 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
367 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
368 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
369 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
370 switch (open_flags) {
372 set_bit(NFS_O_RDONLY_STATE, &state->flags);
375 set_bit(NFS_O_WRONLY_STATE, &state->flags);
377 case FMODE_READ|FMODE_WRITE:
378 set_bit(NFS_O_RDWR_STATE, &state->flags);
382 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
384 write_seqlock(&state->seqlock);
385 nfs_set_open_stateid_locked(state, stateid, open_flags);
386 write_sequnlock(&state->seqlock);
389 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
391 open_flags &= (FMODE_READ|FMODE_WRITE);
393 * Protect the call to nfs4_state_set_mode_locked and
394 * serialise the stateid update
396 write_seqlock(&state->seqlock);
397 if (deleg_stateid != NULL) {
398 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
399 set_bit(NFS_DELEGATED_STATE, &state->flags);
401 if (open_stateid != NULL)
402 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
403 write_sequnlock(&state->seqlock);
404 spin_lock(&state->owner->so_lock);
405 update_open_stateflags(state, open_flags);
406 spin_unlock(&state->owner->so_lock);
409 static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
411 struct nfs_delegation *delegation;
414 delegation = rcu_dereference(NFS_I(inode)->delegation);
415 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
420 nfs_inode_return_delegation(inode);
423 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
425 struct nfs4_state *state = opendata->state;
426 struct nfs_inode *nfsi = NFS_I(state->inode);
427 struct nfs_delegation *delegation;
428 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
429 nfs4_stateid stateid;
433 delegation = rcu_dereference(nfsi->delegation);
435 if (can_open_cached(state, open_mode)) {
436 spin_lock(&state->owner->so_lock);
437 if (can_open_cached(state, open_mode)) {
438 update_open_stateflags(state, open_mode);
439 spin_unlock(&state->owner->so_lock);
441 goto out_return_state;
443 spin_unlock(&state->owner->so_lock);
445 if (delegation == NULL)
447 if (!can_open_delegated(delegation, open_mode))
449 /* Save the delegation */
450 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
453 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
459 delegation = rcu_dereference(nfsi->delegation);
460 /* If no delegation, try a cached open */
461 if (delegation == NULL)
463 /* Is the delegation still valid? */
464 if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
467 update_open_stateid(state, NULL, &stateid, open_mode);
468 goto out_return_state;
474 atomic_inc(&state->count);
478 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
481 struct nfs4_state *state = NULL;
482 struct nfs_delegation *delegation;
483 nfs4_stateid *deleg_stateid = NULL;
486 if (!data->rpc_done) {
487 state = nfs4_try_open_cached(data);
492 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
494 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
495 ret = PTR_ERR(inode);
499 state = nfs4_get_open_state(inode, data->owner);
502 if (data->o_res.delegation_type != 0) {
503 int delegation_flags = 0;
506 delegation = rcu_dereference(NFS_I(inode)->delegation);
508 delegation_flags = delegation->flags;
510 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
511 nfs_inode_set_delegation(state->inode,
512 data->owner->so_cred,
515 nfs_inode_reclaim_delegation(state->inode,
516 data->owner->so_cred,
520 delegation = rcu_dereference(NFS_I(inode)->delegation);
521 if (delegation != NULL)
522 deleg_stateid = &delegation->stateid;
523 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
534 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
536 struct nfs_inode *nfsi = NFS_I(state->inode);
537 struct nfs_open_context *ctx;
539 spin_lock(&state->inode->i_lock);
540 list_for_each_entry(ctx, &nfsi->open_files, list) {
541 if (ctx->state != state)
543 get_nfs_open_context(ctx);
544 spin_unlock(&state->inode->i_lock);
547 spin_unlock(&state->inode->i_lock);
548 return ERR_PTR(-ENOENT);
551 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
553 struct nfs4_opendata *opendata;
555 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
556 if (opendata == NULL)
557 return ERR_PTR(-ENOMEM);
558 opendata->state = state;
559 atomic_inc(&state->count);
563 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
565 struct nfs4_state *newstate;
568 opendata->o_arg.open_flags = openflags;
569 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
570 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
571 nfs4_init_opendata_res(opendata);
572 ret = _nfs4_proc_open(opendata);
575 newstate = nfs4_opendata_to_nfs4_state(opendata);
576 if (IS_ERR(newstate))
577 return PTR_ERR(newstate);
578 nfs4_close_state(&opendata->path, newstate, openflags);
583 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
585 struct nfs4_state *newstate;
588 /* memory barrier prior to reading state->n_* */
589 clear_bit(NFS_DELEGATED_STATE, &state->flags);
591 if (state->n_rdwr != 0) {
592 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
595 if (newstate != state)
598 if (state->n_wronly != 0) {
599 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
602 if (newstate != state)
605 if (state->n_rdonly != 0) {
606 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
609 if (newstate != state)
613 * We may have performed cached opens for all three recoveries.
614 * Check if we need to update the current stateid.
616 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
617 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
618 write_seqlock(&state->seqlock);
619 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
620 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
621 write_sequnlock(&state->seqlock);
628 * reclaim state on the server after a reboot.
630 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
632 struct nfs_delegation *delegation;
633 struct nfs4_opendata *opendata;
634 int delegation_type = 0;
637 opendata = nfs4_open_recoverdata_alloc(ctx, state);
638 if (IS_ERR(opendata))
639 return PTR_ERR(opendata);
640 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
641 opendata->o_arg.fh = NFS_FH(state->inode);
643 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
644 if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
645 delegation_type = delegation->type;
647 opendata->o_arg.u.delegation_type = delegation_type;
648 status = nfs4_open_recover(opendata, state);
649 nfs4_opendata_put(opendata);
653 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
655 struct nfs_server *server = NFS_SERVER(state->inode);
656 struct nfs4_exception exception = { };
659 err = _nfs4_do_open_reclaim(ctx, state);
660 if (err != -NFS4ERR_DELAY)
662 nfs4_handle_exception(server, err, &exception);
663 } while (exception.retry);
667 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
669 struct nfs_open_context *ctx;
672 ctx = nfs4_state_find_open_context(state);
675 ret = nfs4_do_open_reclaim(ctx, state);
676 put_nfs_open_context(ctx);
680 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
682 struct nfs4_opendata *opendata;
685 opendata = nfs4_open_recoverdata_alloc(ctx, state);
686 if (IS_ERR(opendata))
687 return PTR_ERR(opendata);
688 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
689 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
690 sizeof(opendata->o_arg.u.delegation.data));
691 ret = nfs4_open_recover(opendata, state);
692 nfs4_opendata_put(opendata);
696 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
698 struct nfs4_exception exception = { };
699 struct nfs_server *server = NFS_SERVER(state->inode);
702 err = _nfs4_open_delegation_recall(ctx, state, stateid);
706 case -NFS4ERR_STALE_CLIENTID:
707 case -NFS4ERR_STALE_STATEID:
708 case -NFS4ERR_EXPIRED:
709 /* Don't recall a delegation if it was lost */
710 nfs4_schedule_state_recovery(server->nfs_client);
713 err = nfs4_handle_exception(server, err, &exception);
714 } while (exception.retry);
718 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
720 struct nfs4_opendata *data = calldata;
721 struct rpc_message msg = {
722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
723 .rpc_argp = &data->c_arg,
724 .rpc_resp = &data->c_res,
725 .rpc_cred = data->owner->so_cred,
727 data->timestamp = jiffies;
728 rpc_call_setup(task, &msg, 0);
731 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
733 struct nfs4_opendata *data = calldata;
735 data->rpc_status = task->tk_status;
736 if (RPC_ASSASSINATED(task))
738 if (data->rpc_status == 0) {
739 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
740 sizeof(data->o_res.stateid.data));
741 renew_lease(data->o_res.server, data->timestamp);
744 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
745 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
748 static void nfs4_open_confirm_release(void *calldata)
750 struct nfs4_opendata *data = calldata;
751 struct nfs4_state *state = NULL;
753 /* If this request hasn't been cancelled, do nothing */
754 if (data->cancelled == 0)
756 /* In case of error, no cleanup! */
759 nfs_confirm_seqid(&data->owner->so_seqid, 0);
760 state = nfs4_opendata_to_nfs4_state(data);
762 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
764 nfs4_opendata_put(data);
767 static const struct rpc_call_ops nfs4_open_confirm_ops = {
768 .rpc_call_prepare = nfs4_open_confirm_prepare,
769 .rpc_call_done = nfs4_open_confirm_done,
770 .rpc_release = nfs4_open_confirm_release,
774 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
776 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
778 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
779 struct rpc_task *task;
782 kref_get(&data->kref);
784 data->rpc_status = 0;
785 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
787 return PTR_ERR(task);
788 status = nfs4_wait_for_completion_rpc_task(task);
793 status = data->rpc_status;
798 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
800 struct nfs4_opendata *data = calldata;
801 struct nfs4_state_owner *sp = data->owner;
802 struct rpc_message msg = {
803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
804 .rpc_argp = &data->o_arg,
805 .rpc_resp = &data->o_res,
806 .rpc_cred = sp->so_cred,
809 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
812 * Check if we still need to send an OPEN call, or if we can use
813 * a delegation instead.
815 if (data->state != NULL) {
816 struct nfs_delegation *delegation;
818 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
821 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
822 if (delegation != NULL &&
823 (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
829 /* Update sequence id. */
830 data->o_arg.id = sp->so_owner_id.id;
831 data->o_arg.clientid = sp->so_client->cl_clientid;
832 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
833 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
834 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
836 data->timestamp = jiffies;
837 rpc_call_setup(task, &msg, 0);
840 task->tk_action = NULL;
844 static void nfs4_open_done(struct rpc_task *task, void *calldata)
846 struct nfs4_opendata *data = calldata;
848 data->rpc_status = task->tk_status;
849 if (RPC_ASSASSINATED(task))
851 if (task->tk_status == 0) {
852 switch (data->o_res.f_attr->mode & S_IFMT) {
856 data->rpc_status = -ELOOP;
859 data->rpc_status = -EISDIR;
862 data->rpc_status = -ENOTDIR;
864 renew_lease(data->o_res.server, data->timestamp);
865 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
866 nfs_confirm_seqid(&data->owner->so_seqid, 0);
868 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
872 static void nfs4_open_release(void *calldata)
874 struct nfs4_opendata *data = calldata;
875 struct nfs4_state *state = NULL;
877 /* If this request hasn't been cancelled, do nothing */
878 if (data->cancelled == 0)
880 /* In case of error, no cleanup! */
881 if (data->rpc_status != 0 || !data->rpc_done)
883 /* In case we need an open_confirm, no cleanup! */
884 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
886 nfs_confirm_seqid(&data->owner->so_seqid, 0);
887 state = nfs4_opendata_to_nfs4_state(data);
889 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
891 nfs4_opendata_put(data);
894 static const struct rpc_call_ops nfs4_open_ops = {
895 .rpc_call_prepare = nfs4_open_prepare,
896 .rpc_call_done = nfs4_open_done,
897 .rpc_release = nfs4_open_release,
901 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
903 static int _nfs4_proc_open(struct nfs4_opendata *data)
905 struct inode *dir = data->dir->d_inode;
906 struct nfs_server *server = NFS_SERVER(dir);
907 struct nfs_openargs *o_arg = &data->o_arg;
908 struct nfs_openres *o_res = &data->o_res;
909 struct rpc_task *task;
912 kref_get(&data->kref);
914 data->rpc_status = 0;
916 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
918 return PTR_ERR(task);
919 status = nfs4_wait_for_completion_rpc_task(task);
924 status = data->rpc_status;
926 if (status != 0 || !data->rpc_done)
929 if (o_res->fh.size == 0)
930 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
932 if (o_arg->open_flags & O_CREAT) {
933 update_changeattr(dir, &o_res->cinfo);
934 nfs_post_op_update_inode(dir, o_res->dir_attr);
936 nfs_refresh_inode(dir, o_res->dir_attr);
937 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
938 status = _nfs4_proc_open_confirm(data);
942 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
943 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
947 static int nfs4_recover_expired_lease(struct nfs_server *server)
949 struct nfs_client *clp = server->nfs_client;
953 ret = nfs4_wait_clnt_recover(server->client, clp);
956 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
958 nfs4_schedule_state_recovery(clp);
965 * reclaim state on the server after a network partition.
966 * Assumes caller holds the appropriate lock
968 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
970 struct nfs4_opendata *opendata;
973 opendata = nfs4_open_recoverdata_alloc(ctx, state);
974 if (IS_ERR(opendata))
975 return PTR_ERR(opendata);
976 ret = nfs4_open_recover(opendata, state);
977 if (ret == -ESTALE) {
978 /* Invalidate the state owner so we don't ever use it again */
979 nfs4_drop_state_owner(state->owner);
980 d_drop(ctx->path.dentry);
982 nfs4_opendata_put(opendata);
986 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
988 struct nfs_server *server = NFS_SERVER(state->inode);
989 struct nfs4_exception exception = { };
993 err = _nfs4_open_expired(ctx, state);
994 if (err == -NFS4ERR_DELAY)
995 nfs4_handle_exception(server, err, &exception);
996 } while (exception.retry);
1000 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1002 struct nfs_open_context *ctx;
1005 ctx = nfs4_state_find_open_context(state);
1007 return PTR_ERR(ctx);
1008 ret = nfs4_do_open_expired(ctx, state);
1009 put_nfs_open_context(ctx);
1014 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1015 * fields corresponding to attributes that were used to store the verifier.
1016 * Make sure we clobber those fields in the later setattr call
1018 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1020 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1021 !(sattr->ia_valid & ATTR_ATIME_SET))
1022 sattr->ia_valid |= ATTR_ATIME;
1024 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1025 !(sattr->ia_valid & ATTR_MTIME_SET))
1026 sattr->ia_valid |= ATTR_MTIME;
1030 * Returns a referenced nfs4_state
1032 static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1034 struct nfs4_state_owner *sp;
1035 struct nfs4_state *state = NULL;
1036 struct nfs_server *server = NFS_SERVER(dir);
1037 struct nfs_client *clp = server->nfs_client;
1038 struct nfs4_opendata *opendata;
1041 /* Protect against reboot recovery conflicts */
1043 if (!(sp = nfs4_get_state_owner(server, cred))) {
1044 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1047 status = nfs4_recover_expired_lease(server);
1049 goto err_put_state_owner;
1050 if (path->dentry->d_inode != NULL)
1051 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
1052 down_read(&clp->cl_sem);
1054 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
1055 if (opendata == NULL)
1056 goto err_release_rwsem;
1058 if (path->dentry->d_inode != NULL)
1059 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1061 status = _nfs4_proc_open(opendata);
1063 goto err_opendata_put;
1065 if (opendata->o_arg.open_flags & O_EXCL)
1066 nfs4_exclusive_attrset(opendata, sattr);
1068 state = nfs4_opendata_to_nfs4_state(opendata);
1069 status = PTR_ERR(state);
1071 goto err_opendata_put;
1072 nfs4_opendata_put(opendata);
1073 nfs4_put_state_owner(sp);
1074 up_read(&clp->cl_sem);
1078 nfs4_opendata_put(opendata);
1080 up_read(&clp->cl_sem);
1081 err_put_state_owner:
1082 nfs4_put_state_owner(sp);
1089 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1091 struct nfs4_exception exception = { };
1092 struct nfs4_state *res;
1096 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1099 /* NOTE: BAD_SEQID means the server and client disagree about the
1100 * book-keeping w.r.t. state-changing operations
1101 * (OPEN/CLOSE/LOCK/LOCKU...)
1102 * It is actually a sign of a bug on the client or on the server.
1104 * If we receive a BAD_SEQID error in the particular case of
1105 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1106 * have unhashed the old state_owner for us, and that we can
1107 * therefore safely retry using a new one. We should still warn
1108 * the user though...
1110 if (status == -NFS4ERR_BAD_SEQID) {
1111 printk(KERN_WARNING "NFS: v4 server %s "
1112 " returned a bad sequence-id error!\n",
1113 NFS_SERVER(dir)->nfs_client->cl_hostname);
1114 exception.retry = 1;
1118 * BAD_STATEID on OPEN means that the server cancelled our
1119 * state before it received the OPEN_CONFIRM.
1120 * Recover by retrying the request as per the discussion
1121 * on Page 181 of RFC3530.
1123 if (status == -NFS4ERR_BAD_STATEID) {
1124 exception.retry = 1;
1127 if (status == -EAGAIN) {
1128 /* We must have found a delegation */
1129 exception.retry = 1;
1132 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1133 status, &exception));
1134 } while (exception.retry);
1138 static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1139 struct iattr *sattr, struct nfs4_state *state)
1141 struct nfs_server *server = NFS_SERVER(inode);
1142 struct nfs_setattrargs arg = {
1143 .fh = NFS_FH(inode),
1146 .bitmask = server->attr_bitmask,
1148 struct nfs_setattrres res = {
1152 struct rpc_message msg = {
1153 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1157 unsigned long timestamp = jiffies;
1160 nfs_fattr_init(fattr);
1162 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1163 /* Use that stateid */
1164 } else if (state != NULL) {
1165 msg.rpc_cred = state->owner->so_cred;
1166 nfs4_copy_stateid(&arg.stateid, state, current->files);
1168 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1170 status = rpc_call_sync(server->client, &msg, 0);
1171 if (status == 0 && state != NULL)
1172 renew_lease(server, timestamp);
1176 static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1177 struct iattr *sattr, struct nfs4_state *state)
1179 struct nfs_server *server = NFS_SERVER(inode);
1180 struct nfs4_exception exception = { };
1183 err = nfs4_handle_exception(server,
1184 _nfs4_do_setattr(inode, fattr, sattr, state),
1186 } while (exception.retry);
1190 struct nfs4_closedata {
1192 struct inode *inode;
1193 struct nfs4_state *state;
1194 struct nfs_closeargs arg;
1195 struct nfs_closeres res;
1196 struct nfs_fattr fattr;
1197 unsigned long timestamp;
1200 static void nfs4_free_closedata(void *data)
1202 struct nfs4_closedata *calldata = data;
1203 struct nfs4_state_owner *sp = calldata->state->owner;
1205 nfs4_put_open_state(calldata->state);
1206 nfs_free_seqid(calldata->arg.seqid);
1207 nfs4_put_state_owner(sp);
1208 dput(calldata->path.dentry);
1209 mntput(calldata->path.mnt);
1213 static void nfs4_close_done(struct rpc_task *task, void *data)
1215 struct nfs4_closedata *calldata = data;
1216 struct nfs4_state *state = calldata->state;
1217 struct nfs_server *server = NFS_SERVER(calldata->inode);
1219 if (RPC_ASSASSINATED(task))
1221 /* hmm. we are done with the inode, and in the process of freeing
1222 * the state_owner. we keep this around to process errors
1224 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1225 switch (task->tk_status) {
1227 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1228 renew_lease(server, calldata->timestamp);
1230 case -NFS4ERR_STALE_STATEID:
1231 case -NFS4ERR_EXPIRED:
1234 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1235 rpc_restart_call(task);
1239 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1242 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1244 struct nfs4_closedata *calldata = data;
1245 struct nfs4_state *state = calldata->state;
1246 struct rpc_message msg = {
1247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1248 .rpc_argp = &calldata->arg,
1249 .rpc_resp = &calldata->res,
1250 .rpc_cred = state->owner->so_cred,
1252 int clear_rd, clear_wr, clear_rdwr;
1254 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1257 clear_rd = clear_wr = clear_rdwr = 0;
1258 spin_lock(&state->owner->so_lock);
1259 /* Calculate the change in open mode */
1260 if (state->n_rdwr == 0) {
1261 if (state->n_rdonly == 0) {
1262 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1263 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1265 if (state->n_wronly == 0) {
1266 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1267 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1270 spin_unlock(&state->owner->so_lock);
1271 if (!clear_rd && !clear_wr && !clear_rdwr) {
1272 /* Note: exit _without_ calling nfs4_close_done */
1273 task->tk_action = NULL;
1276 nfs_fattr_init(calldata->res.fattr);
1277 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1278 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1279 calldata->arg.open_flags = FMODE_READ;
1280 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1281 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1282 calldata->arg.open_flags = FMODE_WRITE;
1284 calldata->timestamp = jiffies;
1285 rpc_call_setup(task, &msg, 0);
1288 static const struct rpc_call_ops nfs4_close_ops = {
1289 .rpc_call_prepare = nfs4_close_prepare,
1290 .rpc_call_done = nfs4_close_done,
1291 .rpc_release = nfs4_free_closedata,
1295 * It is possible for data to be read/written from a mem-mapped file
1296 * after the sys_close call (which hits the vfs layer as a flush).
1297 * This means that we can't safely call nfsv4 close on a file until
1298 * the inode is cleared. This in turn means that we are not good
1299 * NFSv4 citizens - we do not indicate to the server to update the file's
1300 * share state even when we are done with one of the three share
1301 * stateid's in the inode.
1303 * NOTE: Caller must be holding the sp->so_owner semaphore!
1305 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1307 struct nfs_server *server = NFS_SERVER(state->inode);
1308 struct nfs4_closedata *calldata;
1309 struct nfs4_state_owner *sp = state->owner;
1310 struct rpc_task *task;
1311 int status = -ENOMEM;
1313 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1314 if (calldata == NULL)
1316 calldata->inode = state->inode;
1317 calldata->state = state;
1318 calldata->arg.fh = NFS_FH(state->inode);
1319 calldata->arg.stateid = &state->open_stateid;
1320 /* Serialization for the sequence id */
1321 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1322 if (calldata->arg.seqid == NULL)
1323 goto out_free_calldata;
1324 calldata->arg.bitmask = server->attr_bitmask;
1325 calldata->res.fattr = &calldata->fattr;
1326 calldata->res.server = server;
1327 calldata->path.mnt = mntget(path->mnt);
1328 calldata->path.dentry = dget(path->dentry);
1330 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata);
1332 return PTR_ERR(task);
1335 status = rpc_wait_for_completion_task(task);
1341 nfs4_put_open_state(state);
1342 nfs4_put_state_owner(sp);
1346 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
1351 /* If the open_intent is for execute, we have an extra check to make */
1352 if (nd->intent.open.flags & FMODE_EXEC) {
1353 ret = nfs_may_open(state->inode,
1354 state->owner->so_cred,
1355 nd->intent.open.flags);
1359 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1360 if (!IS_ERR(filp)) {
1361 struct nfs_open_context *ctx;
1362 ctx = nfs_file_open_context(filp);
1366 ret = PTR_ERR(filp);
1368 nfs4_close_sync(path, state, nd->intent.open.flags);
1373 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1375 struct dentry *parent;
1376 struct path path = {
1381 struct rpc_cred *cred;
1382 struct nfs4_state *state;
1385 if (nd->flags & LOOKUP_CREATE) {
1386 attr.ia_mode = nd->intent.open.create_mode;
1387 attr.ia_valid = ATTR_MODE;
1388 if (!IS_POSIXACL(dir))
1389 attr.ia_mode &= ~current->fs->umask;
1392 BUG_ON(nd->intent.open.flags & O_CREAT);
1395 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1397 return (struct dentry *)cred;
1398 parent = dentry->d_parent;
1399 /* Protect against concurrent sillydeletes */
1400 nfs_block_sillyrename(parent);
1401 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1403 if (IS_ERR(state)) {
1404 if (PTR_ERR(state) == -ENOENT) {
1405 d_add(dentry, NULL);
1406 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1408 nfs_unblock_sillyrename(parent);
1409 return (struct dentry *)state;
1411 res = d_add_unique(dentry, igrab(state->inode));
1414 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1415 nfs_unblock_sillyrename(parent);
1416 nfs4_intent_set_file(nd, &path, state);
1421 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1423 struct path path = {
1427 struct rpc_cred *cred;
1428 struct nfs4_state *state;
1430 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1432 return PTR_ERR(cred);
1433 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1435 if (IS_ERR(state)) {
1436 switch (PTR_ERR(state)) {
1442 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1448 if (state->inode == dentry->d_inode) {
1449 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1450 nfs4_intent_set_file(nd, &path, state);
1453 nfs4_close_sync(&path, state, openflags);
1460 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1462 struct nfs4_server_caps_res res = {};
1463 struct rpc_message msg = {
1464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1465 .rpc_argp = fhandle,
1470 status = rpc_call_sync(server->client, &msg, 0);
1472 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1473 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1474 server->caps |= NFS_CAP_ACLS;
1475 if (res.has_links != 0)
1476 server->caps |= NFS_CAP_HARDLINKS;
1477 if (res.has_symlinks != 0)
1478 server->caps |= NFS_CAP_SYMLINKS;
1479 server->acl_bitmask = res.acl_bitmask;
1484 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1486 struct nfs4_exception exception = { };
1489 err = nfs4_handle_exception(server,
1490 _nfs4_server_capabilities(server, fhandle),
1492 } while (exception.retry);
1496 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1497 struct nfs_fsinfo *info)
1499 struct nfs4_lookup_root_arg args = {
1500 .bitmask = nfs4_fattr_bitmap,
1502 struct nfs4_lookup_res res = {
1504 .fattr = info->fattr,
1507 struct rpc_message msg = {
1508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1512 nfs_fattr_init(info->fattr);
1513 return rpc_call_sync(server->client, &msg, 0);
1516 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1517 struct nfs_fsinfo *info)
1519 struct nfs4_exception exception = { };
1522 err = nfs4_handle_exception(server,
1523 _nfs4_lookup_root(server, fhandle, info),
1525 } while (exception.retry);
1530 * get the file handle for the "/" directory on the server
1532 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1533 struct nfs_fsinfo *info)
1537 status = nfs4_lookup_root(server, fhandle, info);
1539 status = nfs4_server_capabilities(server, fhandle);
1541 status = nfs4_do_fsinfo(server, fhandle, info);
1542 return nfs4_map_errors(status);
1546 * Get locations and (maybe) other attributes of a referral.
1547 * Note that we'll actually follow the referral later when
1548 * we detect fsid mismatch in inode revalidation
1550 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1552 int status = -ENOMEM;
1553 struct page *page = NULL;
1554 struct nfs4_fs_locations *locations = NULL;
1556 page = alloc_page(GFP_KERNEL);
1559 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1560 if (locations == NULL)
1563 status = nfs4_proc_fs_locations(dir, name, locations, page);
1566 /* Make sure server returned a different fsid for the referral */
1567 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1568 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1573 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1574 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1576 fattr->mode = S_IFDIR;
1577 memset(fhandle, 0, sizeof(struct nfs_fh));
1586 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1588 struct nfs4_getattr_arg args = {
1590 .bitmask = server->attr_bitmask,
1592 struct nfs4_getattr_res res = {
1596 struct rpc_message msg = {
1597 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1602 nfs_fattr_init(fattr);
1603 return rpc_call_sync(server->client, &msg, 0);
1606 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1608 struct nfs4_exception exception = { };
1611 err = nfs4_handle_exception(server,
1612 _nfs4_proc_getattr(server, fhandle, fattr),
1614 } while (exception.retry);
1619 * The file is not closed if it is opened due to the a request to change
1620 * the size of the file. The open call will not be needed once the
1621 * VFS layer lookup-intents are implemented.
1623 * Close is called when the inode is destroyed.
1624 * If we haven't opened the file for O_WRONLY, we
1625 * need to in the size_change case to obtain a stateid.
1628 * Because OPEN is always done by name in nfsv4, it is
1629 * possible that we opened a different file by the same
1630 * name. We can recognize this race condition, but we
1631 * can't do anything about it besides returning an error.
1633 * This will be fixed with VFS changes (lookup-intent).
1636 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1637 struct iattr *sattr)
1639 struct rpc_cred *cred;
1640 struct inode *inode = dentry->d_inode;
1641 struct nfs_open_context *ctx;
1642 struct nfs4_state *state = NULL;
1645 nfs_fattr_init(fattr);
1647 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
1649 return PTR_ERR(cred);
1651 /* Search for an existing open(O_WRITE) file */
1652 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1656 status = nfs4_do_setattr(inode, fattr, sattr, state);
1658 nfs_setattr_update_inode(inode, sattr);
1660 put_nfs_open_context(ctx);
1665 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1666 const struct qstr *name, struct nfs_fh *fhandle,
1667 struct nfs_fattr *fattr)
1670 struct nfs4_lookup_arg args = {
1671 .bitmask = server->attr_bitmask,
1675 struct nfs4_lookup_res res = {
1680 struct rpc_message msg = {
1681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1686 nfs_fattr_init(fattr);
1688 dprintk("NFS call lookupfh %s\n", name->name);
1689 status = rpc_call_sync(server->client, &msg, 0);
1690 dprintk("NFS reply lookupfh: %d\n", status);
1694 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1695 struct qstr *name, struct nfs_fh *fhandle,
1696 struct nfs_fattr *fattr)
1698 struct nfs4_exception exception = { };
1701 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1703 if (err == -NFS4ERR_MOVED) {
1707 err = nfs4_handle_exception(server, err, &exception);
1708 } while (exception.retry);
1712 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1713 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1717 dprintk("NFS call lookup %s\n", name->name);
1718 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
1719 if (status == -NFS4ERR_MOVED)
1720 status = nfs4_get_referral(dir, name, fattr, fhandle);
1721 dprintk("NFS reply lookup: %d\n", status);
1725 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1727 struct nfs4_exception exception = { };
1730 err = nfs4_handle_exception(NFS_SERVER(dir),
1731 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1733 } while (exception.retry);
1737 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1739 struct nfs_server *server = NFS_SERVER(inode);
1740 struct nfs_fattr fattr;
1741 struct nfs4_accessargs args = {
1742 .fh = NFS_FH(inode),
1743 .bitmask = server->attr_bitmask,
1745 struct nfs4_accessres res = {
1749 struct rpc_message msg = {
1750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1753 .rpc_cred = entry->cred,
1755 int mode = entry->mask;
1759 * Determine which access bits we want to ask for...
1761 if (mode & MAY_READ)
1762 args.access |= NFS4_ACCESS_READ;
1763 if (S_ISDIR(inode->i_mode)) {
1764 if (mode & MAY_WRITE)
1765 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1766 if (mode & MAY_EXEC)
1767 args.access |= NFS4_ACCESS_LOOKUP;
1769 if (mode & MAY_WRITE)
1770 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1771 if (mode & MAY_EXEC)
1772 args.access |= NFS4_ACCESS_EXECUTE;
1774 nfs_fattr_init(&fattr);
1775 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1778 if (res.access & NFS4_ACCESS_READ)
1779 entry->mask |= MAY_READ;
1780 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1781 entry->mask |= MAY_WRITE;
1782 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1783 entry->mask |= MAY_EXEC;
1784 nfs_refresh_inode(inode, &fattr);
1789 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1791 struct nfs4_exception exception = { };
1794 err = nfs4_handle_exception(NFS_SERVER(inode),
1795 _nfs4_proc_access(inode, entry),
1797 } while (exception.retry);
1802 * TODO: For the time being, we don't try to get any attributes
1803 * along with any of the zero-copy operations READ, READDIR,
1806 * In the case of the first three, we want to put the GETATTR
1807 * after the read-type operation -- this is because it is hard
1808 * to predict the length of a GETATTR response in v4, and thus
1809 * align the READ data correctly. This means that the GETATTR
1810 * may end up partially falling into the page cache, and we should
1811 * shift it into the 'tail' of the xdr_buf before processing.
1812 * To do this efficiently, we need to know the total length
1813 * of data received, which doesn't seem to be available outside
1816 * In the case of WRITE, we also want to put the GETATTR after
1817 * the operation -- in this case because we want to make sure
1818 * we get the post-operation mtime and size. This means that
1819 * we can't use xdr_encode_pages() as written: we need a variant
1820 * of it which would leave room in the 'tail' iovec.
1822 * Both of these changes to the XDR layer would in fact be quite
1823 * minor, but I decided to leave them for a subsequent patch.
1825 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1826 unsigned int pgbase, unsigned int pglen)
1828 struct nfs4_readlink args = {
1829 .fh = NFS_FH(inode),
1834 struct rpc_message msg = {
1835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1840 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1843 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1844 unsigned int pgbase, unsigned int pglen)
1846 struct nfs4_exception exception = { };
1849 err = nfs4_handle_exception(NFS_SERVER(inode),
1850 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1852 } while (exception.retry);
1858 * We will need to arrange for the VFS layer to provide an atomic open.
1859 * Until then, this create/open method is prone to inefficiency and race
1860 * conditions due to the lookup, create, and open VFS calls from sys_open()
1861 * placed on the wire.
1863 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1864 * The file will be opened again in the subsequent VFS open call
1865 * (nfs4_proc_file_open).
1867 * The open for read will just hang around to be used by any process that
1868 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1872 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1873 int flags, struct nameidata *nd)
1875 struct path path = {
1879 struct nfs4_state *state;
1880 struct rpc_cred *cred;
1883 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1885 status = PTR_ERR(cred);
1888 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1891 if (IS_ERR(state)) {
1892 status = PTR_ERR(state);
1895 d_add(dentry, igrab(state->inode));
1896 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1897 if (flags & O_EXCL) {
1898 struct nfs_fattr fattr;
1899 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
1901 nfs_setattr_update_inode(state->inode, sattr);
1902 nfs_post_op_update_inode(state->inode, &fattr);
1904 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
1905 status = nfs4_intent_set_file(nd, &path, state);
1907 nfs4_close_sync(&path, state, flags);
1912 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1914 struct nfs_server *server = NFS_SERVER(dir);
1915 struct nfs_removeargs args = {
1917 .name.len = name->len,
1918 .name.name = name->name,
1919 .bitmask = server->attr_bitmask,
1921 struct nfs_removeres res = {
1924 struct rpc_message msg = {
1925 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1931 nfs_fattr_init(&res.dir_attr);
1932 status = rpc_call_sync(server->client, &msg, 0);
1934 update_changeattr(dir, &res.cinfo);
1935 nfs_post_op_update_inode(dir, &res.dir_attr);
1940 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1942 struct nfs4_exception exception = { };
1945 err = nfs4_handle_exception(NFS_SERVER(dir),
1946 _nfs4_proc_remove(dir, name),
1948 } while (exception.retry);
1952 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1954 struct nfs_server *server = NFS_SERVER(dir);
1955 struct nfs_removeargs *args = msg->rpc_argp;
1956 struct nfs_removeres *res = msg->rpc_resp;
1958 args->bitmask = server->attr_bitmask;
1959 res->server = server;
1960 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1963 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1965 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1967 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1969 update_changeattr(dir, &res->cinfo);
1970 nfs_post_op_update_inode(dir, &res->dir_attr);
1974 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1975 struct inode *new_dir, struct qstr *new_name)
1977 struct nfs_server *server = NFS_SERVER(old_dir);
1978 struct nfs4_rename_arg arg = {
1979 .old_dir = NFS_FH(old_dir),
1980 .new_dir = NFS_FH(new_dir),
1981 .old_name = old_name,
1982 .new_name = new_name,
1983 .bitmask = server->attr_bitmask,
1985 struct nfs_fattr old_fattr, new_fattr;
1986 struct nfs4_rename_res res = {
1988 .old_fattr = &old_fattr,
1989 .new_fattr = &new_fattr,
1991 struct rpc_message msg = {
1992 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1998 nfs_fattr_init(res.old_fattr);
1999 nfs_fattr_init(res.new_fattr);
2000 status = rpc_call_sync(server->client, &msg, 0);
2003 update_changeattr(old_dir, &res.old_cinfo);
2004 nfs_post_op_update_inode(old_dir, res.old_fattr);
2005 update_changeattr(new_dir, &res.new_cinfo);
2006 nfs_post_op_update_inode(new_dir, res.new_fattr);
2011 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2012 struct inode *new_dir, struct qstr *new_name)
2014 struct nfs4_exception exception = { };
2017 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2018 _nfs4_proc_rename(old_dir, old_name,
2021 } while (exception.retry);
2025 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2027 struct nfs_server *server = NFS_SERVER(inode);
2028 struct nfs4_link_arg arg = {
2029 .fh = NFS_FH(inode),
2030 .dir_fh = NFS_FH(dir),
2032 .bitmask = server->attr_bitmask,
2034 struct nfs_fattr fattr, dir_attr;
2035 struct nfs4_link_res res = {
2038 .dir_attr = &dir_attr,
2040 struct rpc_message msg = {
2041 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2047 nfs_fattr_init(res.fattr);
2048 nfs_fattr_init(res.dir_attr);
2049 status = rpc_call_sync(server->client, &msg, 0);
2051 update_changeattr(dir, &res.cinfo);
2052 nfs_post_op_update_inode(dir, res.dir_attr);
2053 nfs_post_op_update_inode(inode, res.fattr);
2059 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2061 struct nfs4_exception exception = { };
2064 err = nfs4_handle_exception(NFS_SERVER(inode),
2065 _nfs4_proc_link(inode, dir, name),
2067 } while (exception.retry);
2071 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2072 struct page *page, unsigned int len, struct iattr *sattr)
2074 struct nfs_server *server = NFS_SERVER(dir);
2075 struct nfs_fh fhandle;
2076 struct nfs_fattr fattr, dir_fattr;
2077 struct nfs4_create_arg arg = {
2078 .dir_fh = NFS_FH(dir),
2080 .name = &dentry->d_name,
2083 .bitmask = server->attr_bitmask,
2085 struct nfs4_create_res res = {
2089 .dir_fattr = &dir_fattr,
2091 struct rpc_message msg = {
2092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2098 if (len > NFS4_MAXPATHLEN)
2099 return -ENAMETOOLONG;
2101 arg.u.symlink.pages = &page;
2102 arg.u.symlink.len = len;
2103 nfs_fattr_init(&fattr);
2104 nfs_fattr_init(&dir_fattr);
2106 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2108 update_changeattr(dir, &res.dir_cinfo);
2109 nfs_post_op_update_inode(dir, res.dir_fattr);
2110 status = nfs_instantiate(dentry, &fhandle, &fattr);
2115 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2116 struct page *page, unsigned int len, struct iattr *sattr)
2118 struct nfs4_exception exception = { };
2121 err = nfs4_handle_exception(NFS_SERVER(dir),
2122 _nfs4_proc_symlink(dir, dentry, page,
2125 } while (exception.retry);
2129 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2130 struct iattr *sattr)
2132 struct nfs_server *server = NFS_SERVER(dir);
2133 struct nfs_fh fhandle;
2134 struct nfs_fattr fattr, dir_fattr;
2135 struct nfs4_create_arg arg = {
2136 .dir_fh = NFS_FH(dir),
2138 .name = &dentry->d_name,
2141 .bitmask = server->attr_bitmask,
2143 struct nfs4_create_res res = {
2147 .dir_fattr = &dir_fattr,
2149 struct rpc_message msg = {
2150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2156 nfs_fattr_init(&fattr);
2157 nfs_fattr_init(&dir_fattr);
2159 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2161 update_changeattr(dir, &res.dir_cinfo);
2162 nfs_post_op_update_inode(dir, res.dir_fattr);
2163 status = nfs_instantiate(dentry, &fhandle, &fattr);
2168 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2169 struct iattr *sattr)
2171 struct nfs4_exception exception = { };
2174 err = nfs4_handle_exception(NFS_SERVER(dir),
2175 _nfs4_proc_mkdir(dir, dentry, sattr),
2177 } while (exception.retry);
2181 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2182 u64 cookie, struct page *page, unsigned int count, int plus)
2184 struct inode *dir = dentry->d_inode;
2185 struct nfs4_readdir_arg args = {
2190 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2192 struct nfs4_readdir_res res;
2193 struct rpc_message msg = {
2194 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2201 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2202 dentry->d_parent->d_name.name,
2203 dentry->d_name.name,
2204 (unsigned long long)cookie);
2205 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2206 res.pgbase = args.pgbase;
2207 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2209 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2211 nfs_invalidate_atime(dir);
2213 dprintk("%s: returns %d\n", __FUNCTION__, status);
2217 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2218 u64 cookie, struct page *page, unsigned int count, int plus)
2220 struct nfs4_exception exception = { };
2223 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2224 _nfs4_proc_readdir(dentry, cred, cookie,
2227 } while (exception.retry);
2231 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2232 struct iattr *sattr, dev_t rdev)
2234 struct nfs_server *server = NFS_SERVER(dir);
2236 struct nfs_fattr fattr, dir_fattr;
2237 struct nfs4_create_arg arg = {
2238 .dir_fh = NFS_FH(dir),
2240 .name = &dentry->d_name,
2242 .bitmask = server->attr_bitmask,
2244 struct nfs4_create_res res = {
2248 .dir_fattr = &dir_fattr,
2250 struct rpc_message msg = {
2251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2256 int mode = sattr->ia_mode;
2258 nfs_fattr_init(&fattr);
2259 nfs_fattr_init(&dir_fattr);
2261 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2262 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2264 arg.ftype = NF4FIFO;
2265 else if (S_ISBLK(mode)) {
2267 arg.u.device.specdata1 = MAJOR(rdev);
2268 arg.u.device.specdata2 = MINOR(rdev);
2270 else if (S_ISCHR(mode)) {
2272 arg.u.device.specdata1 = MAJOR(rdev);
2273 arg.u.device.specdata2 = MINOR(rdev);
2276 arg.ftype = NF4SOCK;
2278 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2280 update_changeattr(dir, &res.dir_cinfo);
2281 nfs_post_op_update_inode(dir, res.dir_fattr);
2282 status = nfs_instantiate(dentry, &fh, &fattr);
2287 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2288 struct iattr *sattr, dev_t rdev)
2290 struct nfs4_exception exception = { };
2293 err = nfs4_handle_exception(NFS_SERVER(dir),
2294 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2296 } while (exception.retry);
2300 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2301 struct nfs_fsstat *fsstat)
2303 struct nfs4_statfs_arg args = {
2305 .bitmask = server->attr_bitmask,
2307 struct rpc_message msg = {
2308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2313 nfs_fattr_init(fsstat->fattr);
2314 return rpc_call_sync(server->client, &msg, 0);
2317 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2319 struct nfs4_exception exception = { };
2322 err = nfs4_handle_exception(server,
2323 _nfs4_proc_statfs(server, fhandle, fsstat),
2325 } while (exception.retry);
2329 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2330 struct nfs_fsinfo *fsinfo)
2332 struct nfs4_fsinfo_arg args = {
2334 .bitmask = server->attr_bitmask,
2336 struct rpc_message msg = {
2337 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2342 return rpc_call_sync(server->client, &msg, 0);
2345 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2347 struct nfs4_exception exception = { };
2351 err = nfs4_handle_exception(server,
2352 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2354 } while (exception.retry);
2358 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2360 nfs_fattr_init(fsinfo->fattr);
2361 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2364 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2365 struct nfs_pathconf *pathconf)
2367 struct nfs4_pathconf_arg args = {
2369 .bitmask = server->attr_bitmask,
2371 struct rpc_message msg = {
2372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2374 .rpc_resp = pathconf,
2377 /* None of the pathconf attributes are mandatory to implement */
2378 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2379 memset(pathconf, 0, sizeof(*pathconf));
2383 nfs_fattr_init(pathconf->fattr);
2384 return rpc_call_sync(server->client, &msg, 0);
2387 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2388 struct nfs_pathconf *pathconf)
2390 struct nfs4_exception exception = { };
2394 err = nfs4_handle_exception(server,
2395 _nfs4_proc_pathconf(server, fhandle, pathconf),
2397 } while (exception.retry);
2401 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2403 struct nfs_server *server = NFS_SERVER(data->inode);
2405 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
2406 rpc_restart_call(task);
2410 nfs_invalidate_atime(data->inode);
2411 if (task->tk_status > 0)
2412 renew_lease(server, data->timestamp);
2416 static void nfs4_proc_read_setup(struct nfs_read_data *data)
2418 struct rpc_message msg = {
2419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2420 .rpc_argp = &data->args,
2421 .rpc_resp = &data->res,
2422 .rpc_cred = data->cred,
2425 data->timestamp = jiffies;
2427 rpc_call_setup(&data->task, &msg, 0);
2430 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2432 struct inode *inode = data->inode;
2434 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2435 rpc_restart_call(task);
2438 if (task->tk_status >= 0) {
2439 renew_lease(NFS_SERVER(inode), data->timestamp);
2440 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2445 static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2447 struct rpc_message msg = {
2448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2449 .rpc_argp = &data->args,
2450 .rpc_resp = &data->res,
2451 .rpc_cred = data->cred,
2453 struct inode *inode = data->inode;
2454 struct nfs_server *server = NFS_SERVER(inode);
2457 if (how & FLUSH_STABLE) {
2458 if (!NFS_I(inode)->ncommit)
2459 stable = NFS_FILE_SYNC;
2461 stable = NFS_DATA_SYNC;
2463 stable = NFS_UNSTABLE;
2464 data->args.stable = stable;
2465 data->args.bitmask = server->attr_bitmask;
2466 data->res.server = server;
2468 data->timestamp = jiffies;
2470 /* Finalize the task. */
2471 rpc_call_setup(&data->task, &msg, 0);
2474 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2476 struct inode *inode = data->inode;
2478 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2479 rpc_restart_call(task);
2482 nfs_refresh_inode(inode, data->res.fattr);
2486 static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2488 struct rpc_message msg = {
2489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2490 .rpc_argp = &data->args,
2491 .rpc_resp = &data->res,
2492 .rpc_cred = data->cred,
2494 struct nfs_server *server = NFS_SERVER(data->inode);
2496 data->args.bitmask = server->attr_bitmask;
2497 data->res.server = server;
2499 rpc_call_setup(&data->task, &msg, 0);
2503 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2504 * standalone procedure for queueing an asynchronous RENEW.
2506 static void nfs4_renew_done(struct rpc_task *task, void *data)
2508 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2509 unsigned long timestamp = (unsigned long)data;
2511 if (task->tk_status < 0) {
2512 switch (task->tk_status) {
2513 case -NFS4ERR_STALE_CLIENTID:
2514 case -NFS4ERR_EXPIRED:
2515 case -NFS4ERR_CB_PATH_DOWN:
2516 nfs4_schedule_state_recovery(clp);
2520 spin_lock(&clp->cl_lock);
2521 if (time_before(clp->cl_last_renewal,timestamp))
2522 clp->cl_last_renewal = timestamp;
2523 spin_unlock(&clp->cl_lock);
2526 static const struct rpc_call_ops nfs4_renew_ops = {
2527 .rpc_call_done = nfs4_renew_done,
2530 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2532 struct rpc_message msg = {
2533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2538 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2539 &nfs4_renew_ops, (void *)jiffies);
2542 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2544 struct rpc_message msg = {
2545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2549 unsigned long now = jiffies;
2552 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2555 spin_lock(&clp->cl_lock);
2556 if (time_before(clp->cl_last_renewal,now))
2557 clp->cl_last_renewal = now;
2558 spin_unlock(&clp->cl_lock);
2562 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2564 return (server->caps & NFS_CAP_ACLS)
2565 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2566 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2569 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2570 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2573 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2575 static void buf_to_pages(const void *buf, size_t buflen,
2576 struct page **pages, unsigned int *pgbase)
2578 const void *p = buf;
2580 *pgbase = offset_in_page(buf);
2582 while (p < buf + buflen) {
2583 *(pages++) = virt_to_page(p);
2584 p += PAGE_CACHE_SIZE;
2588 struct nfs4_cached_acl {
2594 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2596 struct nfs_inode *nfsi = NFS_I(inode);
2598 spin_lock(&inode->i_lock);
2599 kfree(nfsi->nfs4_acl);
2600 nfsi->nfs4_acl = acl;
2601 spin_unlock(&inode->i_lock);
2604 static void nfs4_zap_acl_attr(struct inode *inode)
2606 nfs4_set_cached_acl(inode, NULL);
2609 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2611 struct nfs_inode *nfsi = NFS_I(inode);
2612 struct nfs4_cached_acl *acl;
2615 spin_lock(&inode->i_lock);
2616 acl = nfsi->nfs4_acl;
2619 if (buf == NULL) /* user is just asking for length */
2621 if (acl->cached == 0)
2623 ret = -ERANGE; /* see getxattr(2) man page */
2624 if (acl->len > buflen)
2626 memcpy(buf, acl->data, acl->len);
2630 spin_unlock(&inode->i_lock);
2634 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2636 struct nfs4_cached_acl *acl;
2638 if (buf && acl_len <= PAGE_SIZE) {
2639 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2643 memcpy(acl->data, buf, acl_len);
2645 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2652 nfs4_set_cached_acl(inode, acl);
2655 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2657 struct page *pages[NFS4ACL_MAXPAGES];
2658 struct nfs_getaclargs args = {
2659 .fh = NFS_FH(inode),
2663 size_t resp_len = buflen;
2665 struct rpc_message msg = {
2666 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2668 .rpc_resp = &resp_len,
2670 struct page *localpage = NULL;
2673 if (buflen < PAGE_SIZE) {
2674 /* As long as we're doing a round trip to the server anyway,
2675 * let's be prepared for a page of acl data. */
2676 localpage = alloc_page(GFP_KERNEL);
2677 resp_buf = page_address(localpage);
2678 if (localpage == NULL)
2680 args.acl_pages[0] = localpage;
2681 args.acl_pgbase = 0;
2682 resp_len = args.acl_len = PAGE_SIZE;
2685 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2687 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2690 if (resp_len > args.acl_len)
2691 nfs4_write_cached_acl(inode, NULL, resp_len);
2693 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2696 if (resp_len > buflen)
2699 memcpy(buf, resp_buf, resp_len);
2704 __free_page(localpage);
2708 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2710 struct nfs4_exception exception = { };
2713 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2716 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2717 } while (exception.retry);
2721 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2723 struct nfs_server *server = NFS_SERVER(inode);
2726 if (!nfs4_server_supports_acls(server))
2728 ret = nfs_revalidate_inode(server, inode);
2731 ret = nfs4_read_cached_acl(inode, buf, buflen);
2734 return nfs4_get_acl_uncached(inode, buf, buflen);
2737 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2739 struct nfs_server *server = NFS_SERVER(inode);
2740 struct page *pages[NFS4ACL_MAXPAGES];
2741 struct nfs_setaclargs arg = {
2742 .fh = NFS_FH(inode),
2746 struct rpc_message msg = {
2747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2753 if (!nfs4_server_supports_acls(server))
2755 nfs_inode_return_delegation(inode);
2756 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2757 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2758 nfs_zap_caches(inode);
2762 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2764 struct nfs4_exception exception = { };
2767 err = nfs4_handle_exception(NFS_SERVER(inode),
2768 __nfs4_proc_set_acl(inode, buf, buflen),
2770 } while (exception.retry);
2775 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2777 struct nfs_client *clp = server->nfs_client;
2779 if (!clp || task->tk_status >= 0)
2781 switch(task->tk_status) {
2782 case -NFS4ERR_STALE_CLIENTID:
2783 case -NFS4ERR_STALE_STATEID:
2784 case -NFS4ERR_EXPIRED:
2785 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2786 nfs4_schedule_state_recovery(clp);
2787 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
2788 rpc_wake_up_task(task);
2789 task->tk_status = 0;
2791 case -NFS4ERR_DELAY:
2792 nfs_inc_server_stats((struct nfs_server *) server,
2794 case -NFS4ERR_GRACE:
2795 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2796 task->tk_status = 0;
2798 case -NFS4ERR_OLD_STATEID:
2799 task->tk_status = 0;
2802 task->tk_status = nfs4_map_errors(task->tk_status);
2806 static int nfs4_wait_bit_killable(void *word)
2808 if (fatal_signal_pending(current))
2809 return -ERESTARTSYS;
2814 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
2820 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2822 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2823 nfs4_wait_bit_killable, TASK_KILLABLE);
2825 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
2829 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2836 *timeout = NFS4_POLL_RETRY_MIN;
2837 if (*timeout > NFS4_POLL_RETRY_MAX)
2838 *timeout = NFS4_POLL_RETRY_MAX;
2839 schedule_timeout_killable(*timeout);
2840 if (fatal_signal_pending(current))
2846 /* This is the error handling routine for processes that are allowed
2849 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2851 struct nfs_client *clp = server->nfs_client;
2852 int ret = errorcode;
2854 exception->retry = 0;
2858 case -NFS4ERR_STALE_CLIENTID:
2859 case -NFS4ERR_STALE_STATEID:
2860 case -NFS4ERR_EXPIRED:
2861 nfs4_schedule_state_recovery(clp);
2862 ret = nfs4_wait_clnt_recover(server->client, clp);
2864 exception->retry = 1;
2866 case -NFS4ERR_FILE_OPEN:
2867 case -NFS4ERR_GRACE:
2868 case -NFS4ERR_DELAY:
2869 ret = nfs4_delay(server->client, &exception->timeout);
2872 case -NFS4ERR_OLD_STATEID:
2873 exception->retry = 1;
2875 /* We failed to handle the error */
2876 return nfs4_map_errors(ret);
2879 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2881 nfs4_verifier sc_verifier;
2882 struct nfs4_setclientid setclientid = {
2883 .sc_verifier = &sc_verifier,
2886 struct rpc_message msg = {
2887 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2888 .rpc_argp = &setclientid,
2896 p = (__be32*)sc_verifier.data;
2897 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2898 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2901 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2902 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2903 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
2904 cred->cr_ops->cr_name,
2905 clp->cl_id_uniquifier);
2906 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2907 sizeof(setclientid.sc_netid), "tcp");
2908 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2909 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2910 clp->cl_ipaddr, port >> 8, port & 255);
2912 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2913 if (status != -NFS4ERR_CLID_INUSE)
2918 ssleep(clp->cl_lease_time + 1);
2920 if (++clp->cl_id_uniquifier == 0)
2926 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2928 struct nfs_fsinfo fsinfo;
2929 struct rpc_message msg = {
2930 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2932 .rpc_resp = &fsinfo,
2939 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2941 spin_lock(&clp->cl_lock);
2942 clp->cl_lease_time = fsinfo.lease_time * HZ;
2943 clp->cl_last_renewal = now;
2944 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
2945 spin_unlock(&clp->cl_lock);
2950 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2955 err = _nfs4_proc_setclientid_confirm(clp, cred);
2959 case -NFS4ERR_RESOURCE:
2960 /* The IBM lawyers misread another document! */
2961 case -NFS4ERR_DELAY:
2962 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2968 struct nfs4_delegreturndata {
2969 struct nfs4_delegreturnargs args;
2970 struct nfs4_delegreturnres res;
2972 nfs4_stateid stateid;
2973 struct rpc_cred *cred;
2974 unsigned long timestamp;
2975 struct nfs_fattr fattr;
2979 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
2981 struct nfs4_delegreturndata *data = calldata;
2982 struct rpc_message msg = {
2983 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2984 .rpc_argp = &data->args,
2985 .rpc_resp = &data->res,
2986 .rpc_cred = data->cred,
2988 nfs_fattr_init(data->res.fattr);
2989 rpc_call_setup(task, &msg, 0);
2992 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2994 struct nfs4_delegreturndata *data = calldata;
2995 data->rpc_status = task->tk_status;
2996 if (data->rpc_status == 0)
2997 renew_lease(data->res.server, data->timestamp);
3000 static void nfs4_delegreturn_release(void *calldata)
3002 struct nfs4_delegreturndata *data = calldata;
3004 put_rpccred(data->cred);
3008 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3009 .rpc_call_prepare = nfs4_delegreturn_prepare,
3010 .rpc_call_done = nfs4_delegreturn_done,
3011 .rpc_release = nfs4_delegreturn_release,
3014 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3016 struct nfs4_delegreturndata *data;
3017 struct nfs_server *server = NFS_SERVER(inode);
3018 struct rpc_task *task;
3021 data = kmalloc(sizeof(*data), GFP_KERNEL);
3024 data->args.fhandle = &data->fh;
3025 data->args.stateid = &data->stateid;
3026 data->args.bitmask = server->attr_bitmask;
3027 nfs_copy_fh(&data->fh, NFS_FH(inode));
3028 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3029 data->res.fattr = &data->fattr;
3030 data->res.server = server;
3031 data->cred = get_rpccred(cred);
3032 data->timestamp = jiffies;
3033 data->rpc_status = 0;
3035 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
3037 return PTR_ERR(task);
3038 status = nfs4_wait_for_completion_rpc_task(task);
3040 status = data->rpc_status;
3042 nfs_refresh_inode(inode, &data->fattr);
3048 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3050 struct nfs_server *server = NFS_SERVER(inode);
3051 struct nfs4_exception exception = { };
3054 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3056 case -NFS4ERR_STALE_STATEID:
3057 case -NFS4ERR_EXPIRED:
3061 err = nfs4_handle_exception(server, err, &exception);
3062 } while (exception.retry);
3066 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3067 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3070 * sleep, with exponential backoff, and retry the LOCK operation.
3072 static unsigned long
3073 nfs4_set_lock_task_retry(unsigned long timeout)
3075 schedule_timeout_killable(timeout);
3077 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3078 return NFS4_LOCK_MAXTIMEOUT;
3082 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3084 struct inode *inode = state->inode;
3085 struct nfs_server *server = NFS_SERVER(inode);
3086 struct nfs_client *clp = server->nfs_client;
3087 struct nfs_lockt_args arg = {
3088 .fh = NFS_FH(inode),
3091 struct nfs_lockt_res res = {
3094 struct rpc_message msg = {
3095 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3098 .rpc_cred = state->owner->so_cred,
3100 struct nfs4_lock_state *lsp;
3103 down_read(&clp->cl_sem);
3104 arg.lock_owner.clientid = clp->cl_clientid;
3105 status = nfs4_set_lock_state(state, request);
3108 lsp = request->fl_u.nfs4_fl.owner;
3109 arg.lock_owner.id = lsp->ls_id.id;
3110 status = rpc_call_sync(server->client, &msg, 0);
3113 request->fl_type = F_UNLCK;
3115 case -NFS4ERR_DENIED:
3118 request->fl_ops->fl_release_private(request);
3120 up_read(&clp->cl_sem);
3124 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3126 struct nfs4_exception exception = { };
3130 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3131 _nfs4_proc_getlk(state, cmd, request),
3133 } while (exception.retry);
3137 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3140 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3142 res = posix_lock_file_wait(file, fl);
3145 res = flock_lock_file_wait(file, fl);
3153 struct nfs4_unlockdata {
3154 struct nfs_locku_args arg;
3155 struct nfs_locku_res res;
3156 struct nfs4_lock_state *lsp;
3157 struct nfs_open_context *ctx;
3158 struct file_lock fl;
3159 const struct nfs_server *server;
3160 unsigned long timestamp;
3163 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3164 struct nfs_open_context *ctx,
3165 struct nfs4_lock_state *lsp,
3166 struct nfs_seqid *seqid)
3168 struct nfs4_unlockdata *p;
3169 struct inode *inode = lsp->ls_state->inode;
3171 p = kmalloc(sizeof(*p), GFP_KERNEL);
3174 p->arg.fh = NFS_FH(inode);
3176 p->arg.seqid = seqid;
3177 p->arg.stateid = &lsp->ls_stateid;
3179 atomic_inc(&lsp->ls_count);
3180 /* Ensure we don't close file until we're done freeing locks! */
3181 p->ctx = get_nfs_open_context(ctx);
3182 memcpy(&p->fl, fl, sizeof(p->fl));
3183 p->server = NFS_SERVER(inode);
3187 static void nfs4_locku_release_calldata(void *data)
3189 struct nfs4_unlockdata *calldata = data;
3190 nfs_free_seqid(calldata->arg.seqid);
3191 nfs4_put_lock_state(calldata->lsp);
3192 put_nfs_open_context(calldata->ctx);
3196 static void nfs4_locku_done(struct rpc_task *task, void *data)
3198 struct nfs4_unlockdata *calldata = data;
3200 if (RPC_ASSASSINATED(task))
3202 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
3203 switch (task->tk_status) {
3205 memcpy(calldata->lsp->ls_stateid.data,
3206 calldata->res.stateid.data,
3207 sizeof(calldata->lsp->ls_stateid.data));
3208 renew_lease(calldata->server, calldata->timestamp);
3210 case -NFS4ERR_STALE_STATEID:
3211 case -NFS4ERR_EXPIRED:
3214 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
3215 rpc_restart_call(task);
3219 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3221 struct nfs4_unlockdata *calldata = data;
3222 struct rpc_message msg = {
3223 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3224 .rpc_argp = &calldata->arg,
3225 .rpc_resp = &calldata->res,
3226 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
3229 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3231 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3232 /* Note: exit _without_ running nfs4_locku_done */
3233 task->tk_action = NULL;
3236 calldata->timestamp = jiffies;
3237 rpc_call_setup(task, &msg, 0);
3240 static const struct rpc_call_ops nfs4_locku_ops = {
3241 .rpc_call_prepare = nfs4_locku_prepare,
3242 .rpc_call_done = nfs4_locku_done,
3243 .rpc_release = nfs4_locku_release_calldata,
3246 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3247 struct nfs_open_context *ctx,
3248 struct nfs4_lock_state *lsp,
3249 struct nfs_seqid *seqid)
3251 struct nfs4_unlockdata *data;
3253 /* Ensure this is an unlock - when canceling a lock, the
3254 * canceled lock is passed in, and it won't be an unlock.
3256 fl->fl_type = F_UNLCK;
3258 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3260 nfs_free_seqid(seqid);
3261 return ERR_PTR(-ENOMEM);
3264 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
3267 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3269 struct nfs_seqid *seqid;
3270 struct nfs4_lock_state *lsp;
3271 struct rpc_task *task;
3274 status = nfs4_set_lock_state(state, request);
3275 /* Unlock _before_ we do the RPC call */
3276 request->fl_flags |= FL_EXISTS;
3277 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3281 /* Is this a delegated lock? */
3282 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3284 lsp = request->fl_u.nfs4_fl.owner;
3285 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3289 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3290 status = PTR_ERR(task);
3293 status = nfs4_wait_for_completion_rpc_task(task);
3299 struct nfs4_lockdata {
3300 struct nfs_lock_args arg;
3301 struct nfs_lock_res res;
3302 struct nfs4_lock_state *lsp;
3303 struct nfs_open_context *ctx;
3304 struct file_lock fl;
3305 unsigned long timestamp;
3310 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3311 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3313 struct nfs4_lockdata *p;
3314 struct inode *inode = lsp->ls_state->inode;
3315 struct nfs_server *server = NFS_SERVER(inode);
3317 p = kzalloc(sizeof(*p), GFP_KERNEL);
3321 p->arg.fh = NFS_FH(inode);
3323 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3324 if (p->arg.lock_seqid == NULL)
3326 p->arg.lock_stateid = &lsp->ls_stateid;
3327 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3328 p->arg.lock_owner.id = lsp->ls_id.id;
3330 atomic_inc(&lsp->ls_count);
3331 p->ctx = get_nfs_open_context(ctx);
3332 memcpy(&p->fl, fl, sizeof(p->fl));
3339 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3341 struct nfs4_lockdata *data = calldata;
3342 struct nfs4_state *state = data->lsp->ls_state;
3343 struct nfs4_state_owner *sp = state->owner;
3344 struct rpc_message msg = {
3345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3346 .rpc_argp = &data->arg,
3347 .rpc_resp = &data->res,
3348 .rpc_cred = sp->so_cred,
3351 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3353 dprintk("%s: begin!\n", __FUNCTION__);
3354 /* Do we need to do an open_to_lock_owner? */
3355 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3356 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3357 if (data->arg.open_seqid == NULL) {
3358 data->rpc_status = -ENOMEM;
3359 task->tk_action = NULL;
3362 data->arg.open_stateid = &state->stateid;
3363 data->arg.new_lock_owner = 1;
3365 data->timestamp = jiffies;
3366 rpc_call_setup(task, &msg, 0);
3368 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3371 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3373 struct nfs4_lockdata *data = calldata;
3375 dprintk("%s: begin!\n", __FUNCTION__);
3377 data->rpc_status = task->tk_status;
3378 if (RPC_ASSASSINATED(task))
3380 if (data->arg.new_lock_owner != 0) {
3381 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3382 if (data->rpc_status == 0)
3383 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3387 if (data->rpc_status == 0) {
3388 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3389 sizeof(data->lsp->ls_stateid.data));
3390 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3391 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3393 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3395 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3398 static void nfs4_lock_release(void *calldata)
3400 struct nfs4_lockdata *data = calldata;
3402 dprintk("%s: begin!\n", __FUNCTION__);
3403 if (data->arg.open_seqid != NULL)
3404 nfs_free_seqid(data->arg.open_seqid);
3405 if (data->cancelled != 0) {
3406 struct rpc_task *task;
3407 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3408 data->arg.lock_seqid);
3411 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3413 nfs_free_seqid(data->arg.lock_seqid);
3414 nfs4_put_lock_state(data->lsp);
3415 put_nfs_open_context(data->ctx);
3417 dprintk("%s: done!\n", __FUNCTION__);
3420 static const struct rpc_call_ops nfs4_lock_ops = {
3421 .rpc_call_prepare = nfs4_lock_prepare,
3422 .rpc_call_done = nfs4_lock_done,
3423 .rpc_release = nfs4_lock_release,
3426 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3428 struct nfs4_lockdata *data;
3429 struct rpc_task *task;
3432 dprintk("%s: begin!\n", __FUNCTION__);
3433 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3434 fl->fl_u.nfs4_fl.owner);
3438 data->arg.block = 1;
3440 data->arg.reclaim = 1;
3441 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3442 &nfs4_lock_ops, data);
3444 return PTR_ERR(task);
3445 ret = nfs4_wait_for_completion_rpc_task(task);
3447 ret = data->rpc_status;
3448 if (ret == -NFS4ERR_DENIED)
3451 data->cancelled = 1;
3453 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3457 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3459 struct nfs_server *server = NFS_SERVER(state->inode);
3460 struct nfs4_exception exception = { };
3464 /* Cache the lock if possible... */
3465 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3467 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3468 if (err != -NFS4ERR_DELAY)
3470 nfs4_handle_exception(server, err, &exception);
3471 } while (exception.retry);
3475 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3477 struct nfs_server *server = NFS_SERVER(state->inode);
3478 struct nfs4_exception exception = { };
3481 err = nfs4_set_lock_state(state, request);
3485 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3487 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3488 if (err != -NFS4ERR_DELAY)
3490 nfs4_handle_exception(server, err, &exception);
3491 } while (exception.retry);
3495 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3497 struct nfs_client *clp = state->owner->so_client;
3498 unsigned char fl_flags = request->fl_flags;
3501 /* Is this a delegated open? */
3502 status = nfs4_set_lock_state(state, request);
3505 request->fl_flags |= FL_ACCESS;
3506 status = do_vfs_lock(request->fl_file, request);
3509 down_read(&clp->cl_sem);
3510 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3511 struct nfs_inode *nfsi = NFS_I(state->inode);
3512 /* Yes: cache locks! */
3513 down_read(&nfsi->rwsem);
3514 /* ...but avoid races with delegation recall... */
3515 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3516 request->fl_flags = fl_flags & ~FL_SLEEP;
3517 status = do_vfs_lock(request->fl_file, request);
3518 up_read(&nfsi->rwsem);
3521 up_read(&nfsi->rwsem);
3523 status = _nfs4_do_setlk(state, cmd, request, 0);
3526 /* Note: we always want to sleep here! */
3527 request->fl_flags = fl_flags | FL_SLEEP;
3528 if (do_vfs_lock(request->fl_file, request) < 0)
3529 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3531 up_read(&clp->cl_sem);
3533 request->fl_flags = fl_flags;
3537 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3539 struct nfs4_exception exception = { };
3543 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3544 _nfs4_proc_setlk(state, cmd, request),
3546 } while (exception.retry);
3551 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3553 struct nfs_open_context *ctx;
3554 struct nfs4_state *state;
3555 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3558 /* verify open state */
3559 ctx = nfs_file_open_context(filp);
3562 if (request->fl_start < 0 || request->fl_end < 0)
3566 return nfs4_proc_getlk(state, F_GETLK, request);
3568 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3571 if (request->fl_type == F_UNLCK)
3572 return nfs4_proc_unlck(state, cmd, request);
3575 status = nfs4_proc_setlk(state, cmd, request);
3576 if ((status != -EAGAIN) || IS_SETLK(cmd))
3578 timeout = nfs4_set_lock_task_retry(timeout);
3579 status = -ERESTARTSYS;
3582 } while(status < 0);
3586 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3588 struct nfs_server *server = NFS_SERVER(state->inode);
3589 struct nfs4_exception exception = { };
3592 err = nfs4_set_lock_state(state, fl);
3596 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3597 if (err != -NFS4ERR_DELAY)
3599 err = nfs4_handle_exception(server, err, &exception);
3600 } while (exception.retry);
3605 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3607 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3608 size_t buflen, int flags)
3610 struct inode *inode = dentry->d_inode;
3612 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3615 if (!S_ISREG(inode->i_mode) &&
3616 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3619 return nfs4_proc_set_acl(inode, buf, buflen);
3622 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3623 * and that's what we'll do for e.g. user attributes that haven't been set.
3624 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3625 * attributes in kernel-managed attribute namespaces. */
3626 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3629 struct inode *inode = dentry->d_inode;
3631 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3634 return nfs4_proc_get_acl(inode, buf, buflen);
3637 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3639 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3641 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3643 if (buf && buflen < len)
3646 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3650 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
3651 struct nfs4_fs_locations *fs_locations, struct page *page)
3653 struct nfs_server *server = NFS_SERVER(dir);
3655 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3656 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3658 struct nfs4_fs_locations_arg args = {
3659 .dir_fh = NFS_FH(dir),
3664 struct rpc_message msg = {
3665 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3667 .rpc_resp = fs_locations,
3671 dprintk("%s: start\n", __FUNCTION__);
3672 nfs_fattr_init(&fs_locations->fattr);
3673 fs_locations->server = server;
3674 fs_locations->nlocations = 0;
3675 status = rpc_call_sync(server->client, &msg, 0);
3676 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3680 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3681 .recover_open = nfs4_open_reclaim,
3682 .recover_lock = nfs4_lock_reclaim,
3685 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3686 .recover_open = nfs4_open_expired,
3687 .recover_lock = nfs4_lock_expired,
3690 static const struct inode_operations nfs4_file_inode_operations = {
3691 .permission = nfs_permission,
3692 .getattr = nfs_getattr,
3693 .setattr = nfs_setattr,
3694 .getxattr = nfs4_getxattr,
3695 .setxattr = nfs4_setxattr,
3696 .listxattr = nfs4_listxattr,
3699 const struct nfs_rpc_ops nfs_v4_clientops = {
3700 .version = 4, /* protocol version */
3701 .dentry_ops = &nfs4_dentry_operations,
3702 .dir_inode_ops = &nfs4_dir_inode_operations,
3703 .file_inode_ops = &nfs4_file_inode_operations,
3704 .getroot = nfs4_proc_get_root,
3705 .getattr = nfs4_proc_getattr,
3706 .setattr = nfs4_proc_setattr,
3707 .lookupfh = nfs4_proc_lookupfh,
3708 .lookup = nfs4_proc_lookup,
3709 .access = nfs4_proc_access,
3710 .readlink = nfs4_proc_readlink,
3711 .create = nfs4_proc_create,
3712 .remove = nfs4_proc_remove,
3713 .unlink_setup = nfs4_proc_unlink_setup,
3714 .unlink_done = nfs4_proc_unlink_done,
3715 .rename = nfs4_proc_rename,
3716 .link = nfs4_proc_link,
3717 .symlink = nfs4_proc_symlink,
3718 .mkdir = nfs4_proc_mkdir,
3719 .rmdir = nfs4_proc_remove,
3720 .readdir = nfs4_proc_readdir,
3721 .mknod = nfs4_proc_mknod,
3722 .statfs = nfs4_proc_statfs,
3723 .fsinfo = nfs4_proc_fsinfo,
3724 .pathconf = nfs4_proc_pathconf,
3725 .set_capabilities = nfs4_server_capabilities,
3726 .decode_dirent = nfs4_decode_dirent,
3727 .read_setup = nfs4_proc_read_setup,
3728 .read_done = nfs4_read_done,
3729 .write_setup = nfs4_proc_write_setup,
3730 .write_done = nfs4_write_done,
3731 .commit_setup = nfs4_proc_commit_setup,
3732 .commit_done = nfs4_commit_done,
3733 .file_open = nfs_open,
3734 .file_release = nfs_release,
3735 .lock = nfs4_proc_lock,
3736 .clear_acl_cache = nfs4_zap_acl_attr,