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 if (cinfo->after != nfsi->change_attr) {
212 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_DATA;
213 if (!cinfo->atomic || cinfo->before != nfsi->change_attr)
214 nfsi->cache_change_attribute = jiffies;
215 nfsi->change_attr = cinfo->after;
217 spin_unlock(&dir->i_lock);
220 struct nfs4_opendata {
222 struct nfs_openargs o_arg;
223 struct nfs_openres o_res;
224 struct nfs_open_confirmargs c_arg;
225 struct nfs_open_confirmres c_res;
226 struct nfs_fattr f_attr;
227 struct nfs_fattr dir_attr;
230 struct nfs4_state_owner *owner;
231 struct nfs4_state *state;
233 unsigned long timestamp;
234 unsigned int rpc_done : 1;
240 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
242 p->o_res.f_attr = &p->f_attr;
243 p->o_res.dir_attr = &p->dir_attr;
244 p->o_res.server = p->o_arg.server;
245 nfs_fattr_init(&p->f_attr);
246 nfs_fattr_init(&p->dir_attr);
249 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
250 struct nfs4_state_owner *sp, int flags,
251 const struct iattr *attrs)
253 struct dentry *parent = dget_parent(path->dentry);
254 struct inode *dir = parent->d_inode;
255 struct nfs_server *server = NFS_SERVER(dir);
256 struct nfs4_opendata *p;
258 p = kzalloc(sizeof(*p), GFP_KERNEL);
261 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
262 if (p->o_arg.seqid == NULL)
264 p->path.mnt = mntget(path->mnt);
265 p->path.dentry = dget(path->dentry);
268 atomic_inc(&sp->so_count);
269 p->o_arg.fh = NFS_FH(dir);
270 p->o_arg.open_flags = flags,
271 p->o_arg.clientid = server->nfs_client->cl_clientid;
272 p->o_arg.id = sp->so_owner_id.id;
273 p->o_arg.name = &p->path.dentry->d_name;
274 p->o_arg.server = server;
275 p->o_arg.bitmask = server->attr_bitmask;
276 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
277 if (flags & O_EXCL) {
278 u32 *s = (u32 *) p->o_arg.u.verifier.data;
281 } else if (flags & O_CREAT) {
282 p->o_arg.u.attrs = &p->attrs;
283 memcpy(&p->attrs, attrs, sizeof(p->attrs));
285 p->c_arg.fh = &p->o_res.fh;
286 p->c_arg.stateid = &p->o_res.stateid;
287 p->c_arg.seqid = p->o_arg.seqid;
288 nfs4_init_opendata_res(p);
298 static void nfs4_opendata_free(struct kref *kref)
300 struct nfs4_opendata *p = container_of(kref,
301 struct nfs4_opendata, kref);
303 nfs_free_seqid(p->o_arg.seqid);
304 if (p->state != NULL)
305 nfs4_put_open_state(p->state);
306 nfs4_put_state_owner(p->owner);
308 dput(p->path.dentry);
313 static void nfs4_opendata_put(struct nfs4_opendata *p)
316 kref_put(&p->kref, nfs4_opendata_free);
319 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
324 rpc_clnt_sigmask(task->tk_client, &oldset);
325 ret = rpc_wait_for_completion_task(task);
326 rpc_clnt_sigunmask(task->tk_client, &oldset);
330 static int can_open_cached(struct nfs4_state *state, int mode)
333 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
335 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
338 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
340 case FMODE_READ|FMODE_WRITE:
341 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
346 static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
348 if ((delegation->type & open_flags) != open_flags)
350 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
355 static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
357 switch (open_flags) {
364 case FMODE_READ|FMODE_WRITE:
367 nfs4_state_set_mode_locked(state, state->state | open_flags);
370 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
372 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
373 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
374 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
375 switch (open_flags) {
377 set_bit(NFS_O_RDONLY_STATE, &state->flags);
380 set_bit(NFS_O_WRONLY_STATE, &state->flags);
382 case FMODE_READ|FMODE_WRITE:
383 set_bit(NFS_O_RDWR_STATE, &state->flags);
387 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
389 write_seqlock(&state->seqlock);
390 nfs_set_open_stateid_locked(state, stateid, open_flags);
391 write_sequnlock(&state->seqlock);
394 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
396 open_flags &= (FMODE_READ|FMODE_WRITE);
398 * Protect the call to nfs4_state_set_mode_locked and
399 * serialise the stateid update
401 write_seqlock(&state->seqlock);
402 if (deleg_stateid != NULL) {
403 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
404 set_bit(NFS_DELEGATED_STATE, &state->flags);
406 if (open_stateid != NULL)
407 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
408 write_sequnlock(&state->seqlock);
409 spin_lock(&state->owner->so_lock);
410 update_open_stateflags(state, open_flags);
411 spin_unlock(&state->owner->so_lock);
414 static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
416 struct nfs_delegation *delegation;
419 delegation = rcu_dereference(NFS_I(inode)->delegation);
420 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
425 nfs_inode_return_delegation(inode);
428 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
430 struct nfs4_state *state = opendata->state;
431 struct nfs_inode *nfsi = NFS_I(state->inode);
432 struct nfs_delegation *delegation;
433 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
434 nfs4_stateid stateid;
438 delegation = rcu_dereference(nfsi->delegation);
440 if (can_open_cached(state, open_mode)) {
441 spin_lock(&state->owner->so_lock);
442 if (can_open_cached(state, open_mode)) {
443 update_open_stateflags(state, open_mode);
444 spin_unlock(&state->owner->so_lock);
446 goto out_return_state;
448 spin_unlock(&state->owner->so_lock);
450 if (delegation == NULL)
452 if (!can_open_delegated(delegation, open_mode))
454 /* Save the delegation */
455 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
458 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
464 delegation = rcu_dereference(nfsi->delegation);
465 /* If no delegation, try a cached open */
466 if (delegation == NULL)
468 /* Is the delegation still valid? */
469 if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
472 update_open_stateid(state, NULL, &stateid, open_mode);
473 goto out_return_state;
479 atomic_inc(&state->count);
483 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
486 struct nfs4_state *state = NULL;
487 struct nfs_delegation *delegation;
488 nfs4_stateid *deleg_stateid = NULL;
491 if (!data->rpc_done) {
492 state = nfs4_try_open_cached(data);
497 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
499 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
500 ret = PTR_ERR(inode);
504 state = nfs4_get_open_state(inode, data->owner);
507 if (data->o_res.delegation_type != 0) {
508 int delegation_flags = 0;
511 delegation = rcu_dereference(NFS_I(inode)->delegation);
513 delegation_flags = delegation->flags;
515 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
516 nfs_inode_set_delegation(state->inode,
517 data->owner->so_cred,
520 nfs_inode_reclaim_delegation(state->inode,
521 data->owner->so_cred,
525 delegation = rcu_dereference(NFS_I(inode)->delegation);
526 if (delegation != NULL)
527 deleg_stateid = &delegation->stateid;
528 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
539 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
541 struct nfs_inode *nfsi = NFS_I(state->inode);
542 struct nfs_open_context *ctx;
544 spin_lock(&state->inode->i_lock);
545 list_for_each_entry(ctx, &nfsi->open_files, list) {
546 if (ctx->state != state)
548 get_nfs_open_context(ctx);
549 spin_unlock(&state->inode->i_lock);
552 spin_unlock(&state->inode->i_lock);
553 return ERR_PTR(-ENOENT);
556 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
558 struct nfs4_opendata *opendata;
560 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
561 if (opendata == NULL)
562 return ERR_PTR(-ENOMEM);
563 opendata->state = state;
564 atomic_inc(&state->count);
568 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
570 struct nfs4_state *newstate;
573 opendata->o_arg.open_flags = openflags;
574 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
575 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
576 nfs4_init_opendata_res(opendata);
577 ret = _nfs4_proc_open(opendata);
580 newstate = nfs4_opendata_to_nfs4_state(opendata);
581 if (IS_ERR(newstate))
582 return PTR_ERR(newstate);
583 nfs4_close_state(&opendata->path, newstate, openflags);
588 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
590 struct nfs4_state *newstate;
593 /* memory barrier prior to reading state->n_* */
594 clear_bit(NFS_DELEGATED_STATE, &state->flags);
596 if (state->n_rdwr != 0) {
597 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
600 if (newstate != state)
603 if (state->n_wronly != 0) {
604 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
607 if (newstate != state)
610 if (state->n_rdonly != 0) {
611 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
614 if (newstate != state)
618 * We may have performed cached opens for all three recoveries.
619 * Check if we need to update the current stateid.
621 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
622 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
623 write_seqlock(&state->seqlock);
624 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
625 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
626 write_sequnlock(&state->seqlock);
633 * reclaim state on the server after a reboot.
635 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
637 struct nfs_delegation *delegation;
638 struct nfs4_opendata *opendata;
639 int delegation_type = 0;
642 opendata = nfs4_open_recoverdata_alloc(ctx, state);
643 if (IS_ERR(opendata))
644 return PTR_ERR(opendata);
645 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
646 opendata->o_arg.fh = NFS_FH(state->inode);
648 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
649 if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
650 delegation_type = delegation->type;
652 opendata->o_arg.u.delegation_type = delegation_type;
653 status = nfs4_open_recover(opendata, state);
654 nfs4_opendata_put(opendata);
658 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
660 struct nfs_server *server = NFS_SERVER(state->inode);
661 struct nfs4_exception exception = { };
664 err = _nfs4_do_open_reclaim(ctx, state);
665 if (err != -NFS4ERR_DELAY)
667 nfs4_handle_exception(server, err, &exception);
668 } while (exception.retry);
672 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
674 struct nfs_open_context *ctx;
677 ctx = nfs4_state_find_open_context(state);
680 ret = nfs4_do_open_reclaim(ctx, state);
681 put_nfs_open_context(ctx);
685 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
687 struct nfs4_opendata *opendata;
690 opendata = nfs4_open_recoverdata_alloc(ctx, state);
691 if (IS_ERR(opendata))
692 return PTR_ERR(opendata);
693 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
694 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
695 sizeof(opendata->o_arg.u.delegation.data));
696 ret = nfs4_open_recover(opendata, state);
697 nfs4_opendata_put(opendata);
701 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
703 struct nfs4_exception exception = { };
704 struct nfs_server *server = NFS_SERVER(state->inode);
707 err = _nfs4_open_delegation_recall(ctx, state, stateid);
711 case -NFS4ERR_STALE_CLIENTID:
712 case -NFS4ERR_STALE_STATEID:
713 case -NFS4ERR_EXPIRED:
714 /* Don't recall a delegation if it was lost */
715 nfs4_schedule_state_recovery(server->nfs_client);
718 err = nfs4_handle_exception(server, err, &exception);
719 } while (exception.retry);
723 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
725 struct nfs4_opendata *data = calldata;
726 struct rpc_message msg = {
727 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
728 .rpc_argp = &data->c_arg,
729 .rpc_resp = &data->c_res,
730 .rpc_cred = data->owner->so_cred,
732 data->timestamp = jiffies;
733 rpc_call_setup(task, &msg, 0);
736 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
738 struct nfs4_opendata *data = calldata;
740 data->rpc_status = task->tk_status;
741 if (RPC_ASSASSINATED(task))
743 if (data->rpc_status == 0) {
744 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
745 sizeof(data->o_res.stateid.data));
746 renew_lease(data->o_res.server, data->timestamp);
749 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
750 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
753 static void nfs4_open_confirm_release(void *calldata)
755 struct nfs4_opendata *data = calldata;
756 struct nfs4_state *state = NULL;
758 /* If this request hasn't been cancelled, do nothing */
759 if (data->cancelled == 0)
761 /* In case of error, no cleanup! */
764 nfs_confirm_seqid(&data->owner->so_seqid, 0);
765 state = nfs4_opendata_to_nfs4_state(data);
767 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
769 nfs4_opendata_put(data);
772 static const struct rpc_call_ops nfs4_open_confirm_ops = {
773 .rpc_call_prepare = nfs4_open_confirm_prepare,
774 .rpc_call_done = nfs4_open_confirm_done,
775 .rpc_release = nfs4_open_confirm_release,
779 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
781 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
783 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
784 struct rpc_task *task;
787 kref_get(&data->kref);
789 data->rpc_status = 0;
790 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
792 return PTR_ERR(task);
793 status = nfs4_wait_for_completion_rpc_task(task);
798 status = data->rpc_status;
803 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
805 struct nfs4_opendata *data = calldata;
806 struct nfs4_state_owner *sp = data->owner;
807 struct rpc_message msg = {
808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
809 .rpc_argp = &data->o_arg,
810 .rpc_resp = &data->o_res,
811 .rpc_cred = sp->so_cred,
814 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
817 * Check if we still need to send an OPEN call, or if we can use
818 * a delegation instead.
820 if (data->state != NULL) {
821 struct nfs_delegation *delegation;
823 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
826 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
827 if (delegation != NULL &&
828 (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
834 /* Update sequence id. */
835 data->o_arg.id = sp->so_owner_id.id;
836 data->o_arg.clientid = sp->so_client->cl_clientid;
837 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
838 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
839 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
841 data->timestamp = jiffies;
842 rpc_call_setup(task, &msg, 0);
845 task->tk_action = NULL;
849 static void nfs4_open_done(struct rpc_task *task, void *calldata)
851 struct nfs4_opendata *data = calldata;
853 data->rpc_status = task->tk_status;
854 if (RPC_ASSASSINATED(task))
856 if (task->tk_status == 0) {
857 switch (data->o_res.f_attr->mode & S_IFMT) {
861 data->rpc_status = -ELOOP;
864 data->rpc_status = -EISDIR;
867 data->rpc_status = -ENOTDIR;
869 renew_lease(data->o_res.server, data->timestamp);
870 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
871 nfs_confirm_seqid(&data->owner->so_seqid, 0);
873 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
877 static void nfs4_open_release(void *calldata)
879 struct nfs4_opendata *data = calldata;
880 struct nfs4_state *state = NULL;
882 /* If this request hasn't been cancelled, do nothing */
883 if (data->cancelled == 0)
885 /* In case of error, no cleanup! */
886 if (data->rpc_status != 0 || !data->rpc_done)
888 /* In case we need an open_confirm, no cleanup! */
889 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
891 nfs_confirm_seqid(&data->owner->so_seqid, 0);
892 state = nfs4_opendata_to_nfs4_state(data);
894 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
896 nfs4_opendata_put(data);
899 static const struct rpc_call_ops nfs4_open_ops = {
900 .rpc_call_prepare = nfs4_open_prepare,
901 .rpc_call_done = nfs4_open_done,
902 .rpc_release = nfs4_open_release,
906 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
908 static int _nfs4_proc_open(struct nfs4_opendata *data)
910 struct inode *dir = data->dir->d_inode;
911 struct nfs_server *server = NFS_SERVER(dir);
912 struct nfs_openargs *o_arg = &data->o_arg;
913 struct nfs_openres *o_res = &data->o_res;
914 struct rpc_task *task;
917 kref_get(&data->kref);
919 data->rpc_status = 0;
921 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
923 return PTR_ERR(task);
924 status = nfs4_wait_for_completion_rpc_task(task);
929 status = data->rpc_status;
931 if (status != 0 || !data->rpc_done)
934 if (o_res->fh.size == 0)
935 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
937 if (o_arg->open_flags & O_CREAT) {
938 update_changeattr(dir, &o_res->cinfo);
939 nfs_post_op_update_inode(dir, o_res->dir_attr);
941 nfs_refresh_inode(dir, o_res->dir_attr);
942 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
943 status = _nfs4_proc_open_confirm(data);
947 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
948 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
952 static int nfs4_recover_expired_lease(struct nfs_server *server)
954 struct nfs_client *clp = server->nfs_client;
958 ret = nfs4_wait_clnt_recover(server->client, clp);
961 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
963 nfs4_schedule_state_recovery(clp);
970 * reclaim state on the server after a network partition.
971 * Assumes caller holds the appropriate lock
973 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
975 struct nfs4_opendata *opendata;
978 opendata = nfs4_open_recoverdata_alloc(ctx, state);
979 if (IS_ERR(opendata))
980 return PTR_ERR(opendata);
981 ret = nfs4_open_recover(opendata, state);
982 if (ret == -ESTALE) {
983 /* Invalidate the state owner so we don't ever use it again */
984 nfs4_drop_state_owner(state->owner);
985 d_drop(ctx->path.dentry);
987 nfs4_opendata_put(opendata);
991 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
993 struct nfs_server *server = NFS_SERVER(state->inode);
994 struct nfs4_exception exception = { };
998 err = _nfs4_open_expired(ctx, state);
999 if (err == -NFS4ERR_DELAY)
1000 nfs4_handle_exception(server, err, &exception);
1001 } while (exception.retry);
1005 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1007 struct nfs_open_context *ctx;
1010 ctx = nfs4_state_find_open_context(state);
1012 return PTR_ERR(ctx);
1013 ret = nfs4_do_open_expired(ctx, state);
1014 put_nfs_open_context(ctx);
1019 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1020 * fields corresponding to attributes that were used to store the verifier.
1021 * Make sure we clobber those fields in the later setattr call
1023 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1025 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1026 !(sattr->ia_valid & ATTR_ATIME_SET))
1027 sattr->ia_valid |= ATTR_ATIME;
1029 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1030 !(sattr->ia_valid & ATTR_MTIME_SET))
1031 sattr->ia_valid |= ATTR_MTIME;
1035 * Returns a referenced nfs4_state
1037 static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1039 struct nfs4_state_owner *sp;
1040 struct nfs4_state *state = NULL;
1041 struct nfs_server *server = NFS_SERVER(dir);
1042 struct nfs_client *clp = server->nfs_client;
1043 struct nfs4_opendata *opendata;
1046 /* Protect against reboot recovery conflicts */
1048 if (!(sp = nfs4_get_state_owner(server, cred))) {
1049 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1052 status = nfs4_recover_expired_lease(server);
1054 goto err_put_state_owner;
1055 if (path->dentry->d_inode != NULL)
1056 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
1057 down_read(&clp->cl_sem);
1059 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
1060 if (opendata == NULL)
1061 goto err_release_rwsem;
1063 if (path->dentry->d_inode != NULL)
1064 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1066 status = _nfs4_proc_open(opendata);
1068 goto err_opendata_put;
1070 if (opendata->o_arg.open_flags & O_EXCL)
1071 nfs4_exclusive_attrset(opendata, sattr);
1073 state = nfs4_opendata_to_nfs4_state(opendata);
1074 status = PTR_ERR(state);
1076 goto err_opendata_put;
1077 nfs4_opendata_put(opendata);
1078 nfs4_put_state_owner(sp);
1079 up_read(&clp->cl_sem);
1083 nfs4_opendata_put(opendata);
1085 up_read(&clp->cl_sem);
1086 err_put_state_owner:
1087 nfs4_put_state_owner(sp);
1094 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1096 struct nfs4_exception exception = { };
1097 struct nfs4_state *res;
1101 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1104 /* NOTE: BAD_SEQID means the server and client disagree about the
1105 * book-keeping w.r.t. state-changing operations
1106 * (OPEN/CLOSE/LOCK/LOCKU...)
1107 * It is actually a sign of a bug on the client or on the server.
1109 * If we receive a BAD_SEQID error in the particular case of
1110 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1111 * have unhashed the old state_owner for us, and that we can
1112 * therefore safely retry using a new one. We should still warn
1113 * the user though...
1115 if (status == -NFS4ERR_BAD_SEQID) {
1116 printk(KERN_WARNING "NFS: v4 server %s "
1117 " returned a bad sequence-id error!\n",
1118 NFS_SERVER(dir)->nfs_client->cl_hostname);
1119 exception.retry = 1;
1123 * BAD_STATEID on OPEN means that the server cancelled our
1124 * state before it received the OPEN_CONFIRM.
1125 * Recover by retrying the request as per the discussion
1126 * on Page 181 of RFC3530.
1128 if (status == -NFS4ERR_BAD_STATEID) {
1129 exception.retry = 1;
1132 if (status == -EAGAIN) {
1133 /* We must have found a delegation */
1134 exception.retry = 1;
1137 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1138 status, &exception));
1139 } while (exception.retry);
1143 static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1144 struct iattr *sattr, struct nfs4_state *state)
1146 struct nfs_server *server = NFS_SERVER(inode);
1147 struct nfs_setattrargs arg = {
1148 .fh = NFS_FH(inode),
1151 .bitmask = server->attr_bitmask,
1153 struct nfs_setattrres res = {
1157 struct rpc_message msg = {
1158 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1162 unsigned long timestamp = jiffies;
1165 nfs_fattr_init(fattr);
1167 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1168 /* Use that stateid */
1169 } else if (state != NULL) {
1170 msg.rpc_cred = state->owner->so_cred;
1171 nfs4_copy_stateid(&arg.stateid, state, current->files);
1173 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1175 status = rpc_call_sync(server->client, &msg, 0);
1176 if (status == 0 && state != NULL)
1177 renew_lease(server, timestamp);
1181 static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1182 struct iattr *sattr, struct nfs4_state *state)
1184 struct nfs_server *server = NFS_SERVER(inode);
1185 struct nfs4_exception exception = { };
1188 err = nfs4_handle_exception(server,
1189 _nfs4_do_setattr(inode, fattr, sattr, state),
1191 } while (exception.retry);
1195 struct nfs4_closedata {
1197 struct inode *inode;
1198 struct nfs4_state *state;
1199 struct nfs_closeargs arg;
1200 struct nfs_closeres res;
1201 struct nfs_fattr fattr;
1202 unsigned long timestamp;
1205 static void nfs4_free_closedata(void *data)
1207 struct nfs4_closedata *calldata = data;
1208 struct nfs4_state_owner *sp = calldata->state->owner;
1210 nfs4_put_open_state(calldata->state);
1211 nfs_free_seqid(calldata->arg.seqid);
1212 nfs4_put_state_owner(sp);
1213 dput(calldata->path.dentry);
1214 mntput(calldata->path.mnt);
1218 static void nfs4_close_done(struct rpc_task *task, void *data)
1220 struct nfs4_closedata *calldata = data;
1221 struct nfs4_state *state = calldata->state;
1222 struct nfs_server *server = NFS_SERVER(calldata->inode);
1224 if (RPC_ASSASSINATED(task))
1226 /* hmm. we are done with the inode, and in the process of freeing
1227 * the state_owner. we keep this around to process errors
1229 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1230 switch (task->tk_status) {
1232 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1233 renew_lease(server, calldata->timestamp);
1235 case -NFS4ERR_STALE_STATEID:
1236 case -NFS4ERR_EXPIRED:
1239 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1240 rpc_restart_call(task);
1244 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1247 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1249 struct nfs4_closedata *calldata = data;
1250 struct nfs4_state *state = calldata->state;
1251 struct rpc_message msg = {
1252 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1253 .rpc_argp = &calldata->arg,
1254 .rpc_resp = &calldata->res,
1255 .rpc_cred = state->owner->so_cred,
1257 int clear_rd, clear_wr, clear_rdwr;
1259 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1262 clear_rd = clear_wr = clear_rdwr = 0;
1263 spin_lock(&state->owner->so_lock);
1264 /* Calculate the change in open mode */
1265 if (state->n_rdwr == 0) {
1266 if (state->n_rdonly == 0) {
1267 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1268 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1270 if (state->n_wronly == 0) {
1271 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1272 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1275 spin_unlock(&state->owner->so_lock);
1276 if (!clear_rd && !clear_wr && !clear_rdwr) {
1277 /* Note: exit _without_ calling nfs4_close_done */
1278 task->tk_action = NULL;
1281 nfs_fattr_init(calldata->res.fattr);
1282 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1283 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1284 calldata->arg.open_flags = FMODE_READ;
1285 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1286 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1287 calldata->arg.open_flags = FMODE_WRITE;
1289 calldata->timestamp = jiffies;
1290 rpc_call_setup(task, &msg, 0);
1293 static const struct rpc_call_ops nfs4_close_ops = {
1294 .rpc_call_prepare = nfs4_close_prepare,
1295 .rpc_call_done = nfs4_close_done,
1296 .rpc_release = nfs4_free_closedata,
1300 * It is possible for data to be read/written from a mem-mapped file
1301 * after the sys_close call (which hits the vfs layer as a flush).
1302 * This means that we can't safely call nfsv4 close on a file until
1303 * the inode is cleared. This in turn means that we are not good
1304 * NFSv4 citizens - we do not indicate to the server to update the file's
1305 * share state even when we are done with one of the three share
1306 * stateid's in the inode.
1308 * NOTE: Caller must be holding the sp->so_owner semaphore!
1310 int nfs4_do_close(struct path *path, struct nfs4_state *state)
1312 struct nfs_server *server = NFS_SERVER(state->inode);
1313 struct nfs4_closedata *calldata;
1314 struct nfs4_state_owner *sp = state->owner;
1315 struct rpc_task *task;
1316 int status = -ENOMEM;
1318 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1319 if (calldata == NULL)
1321 calldata->inode = state->inode;
1322 calldata->state = state;
1323 calldata->arg.fh = NFS_FH(state->inode);
1324 calldata->arg.stateid = &state->open_stateid;
1325 /* Serialization for the sequence id */
1326 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1327 if (calldata->arg.seqid == NULL)
1328 goto out_free_calldata;
1329 calldata->arg.bitmask = server->attr_bitmask;
1330 calldata->res.fattr = &calldata->fattr;
1331 calldata->res.server = server;
1332 calldata->path.mnt = mntget(path->mnt);
1333 calldata->path.dentry = dget(path->dentry);
1335 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_close_ops, calldata);
1337 return PTR_ERR(task);
1343 nfs4_put_open_state(state);
1344 nfs4_put_state_owner(sp);
1348 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
1353 /* If the open_intent is for execute, we have an extra check to make */
1354 if (nd->intent.open.flags & FMODE_EXEC) {
1355 ret = nfs_may_open(state->inode,
1356 state->owner->so_cred,
1357 nd->intent.open.flags);
1361 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1362 if (!IS_ERR(filp)) {
1363 struct nfs_open_context *ctx;
1364 ctx = nfs_file_open_context(filp);
1368 ret = PTR_ERR(filp);
1370 nfs4_close_state(path, state, nd->intent.open.flags);
1375 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1377 struct path path = {
1382 struct rpc_cred *cred;
1383 struct nfs4_state *state;
1386 if (nd->flags & LOOKUP_CREATE) {
1387 attr.ia_mode = nd->intent.open.create_mode;
1388 attr.ia_valid = ATTR_MODE;
1389 if (!IS_POSIXACL(dir))
1390 attr.ia_mode &= ~current->fs->umask;
1393 BUG_ON(nd->intent.open.flags & O_CREAT);
1396 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1398 return (struct dentry *)cred;
1399 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1401 if (IS_ERR(state)) {
1402 if (PTR_ERR(state) == -ENOENT)
1403 d_add(dentry, NULL);
1404 return (struct dentry *)state;
1406 res = d_add_unique(dentry, igrab(state->inode));
1409 nfs4_intent_set_file(nd, &path, state);
1414 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1416 struct path path = {
1420 struct rpc_cred *cred;
1421 struct nfs4_state *state;
1423 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1425 return PTR_ERR(cred);
1426 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1428 if (IS_ERR(state)) {
1429 switch (PTR_ERR(state)) {
1435 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1441 if (state->inode == dentry->d_inode) {
1442 nfs4_intent_set_file(nd, &path, state);
1445 nfs4_close_state(&path, state, openflags);
1452 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1454 struct nfs4_server_caps_res res = {};
1455 struct rpc_message msg = {
1456 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1457 .rpc_argp = fhandle,
1462 status = rpc_call_sync(server->client, &msg, 0);
1464 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1465 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1466 server->caps |= NFS_CAP_ACLS;
1467 if (res.has_links != 0)
1468 server->caps |= NFS_CAP_HARDLINKS;
1469 if (res.has_symlinks != 0)
1470 server->caps |= NFS_CAP_SYMLINKS;
1471 server->acl_bitmask = res.acl_bitmask;
1476 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1478 struct nfs4_exception exception = { };
1481 err = nfs4_handle_exception(server,
1482 _nfs4_server_capabilities(server, fhandle),
1484 } while (exception.retry);
1488 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1489 struct nfs_fsinfo *info)
1491 struct nfs4_lookup_root_arg args = {
1492 .bitmask = nfs4_fattr_bitmap,
1494 struct nfs4_lookup_res res = {
1496 .fattr = info->fattr,
1499 struct rpc_message msg = {
1500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1504 nfs_fattr_init(info->fattr);
1505 return rpc_call_sync(server->client, &msg, 0);
1508 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1509 struct nfs_fsinfo *info)
1511 struct nfs4_exception exception = { };
1514 err = nfs4_handle_exception(server,
1515 _nfs4_lookup_root(server, fhandle, info),
1517 } while (exception.retry);
1522 * get the file handle for the "/" directory on the server
1524 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1525 struct nfs_fsinfo *info)
1529 status = nfs4_lookup_root(server, fhandle, info);
1531 status = nfs4_server_capabilities(server, fhandle);
1533 status = nfs4_do_fsinfo(server, fhandle, info);
1534 return nfs4_map_errors(status);
1538 * Get locations and (maybe) other attributes of a referral.
1539 * Note that we'll actually follow the referral later when
1540 * we detect fsid mismatch in inode revalidation
1542 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1544 int status = -ENOMEM;
1545 struct page *page = NULL;
1546 struct nfs4_fs_locations *locations = NULL;
1548 page = alloc_page(GFP_KERNEL);
1551 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1552 if (locations == NULL)
1555 status = nfs4_proc_fs_locations(dir, name, locations, page);
1558 /* Make sure server returned a different fsid for the referral */
1559 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1560 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1565 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1566 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1568 fattr->mode = S_IFDIR;
1569 memset(fhandle, 0, sizeof(struct nfs_fh));
1578 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1580 struct nfs4_getattr_arg args = {
1582 .bitmask = server->attr_bitmask,
1584 struct nfs4_getattr_res res = {
1588 struct rpc_message msg = {
1589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1594 nfs_fattr_init(fattr);
1595 return rpc_call_sync(server->client, &msg, 0);
1598 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1600 struct nfs4_exception exception = { };
1603 err = nfs4_handle_exception(server,
1604 _nfs4_proc_getattr(server, fhandle, fattr),
1606 } while (exception.retry);
1611 * The file is not closed if it is opened due to the a request to change
1612 * the size of the file. The open call will not be needed once the
1613 * VFS layer lookup-intents are implemented.
1615 * Close is called when the inode is destroyed.
1616 * If we haven't opened the file for O_WRONLY, we
1617 * need to in the size_change case to obtain a stateid.
1620 * Because OPEN is always done by name in nfsv4, it is
1621 * possible that we opened a different file by the same
1622 * name. We can recognize this race condition, but we
1623 * can't do anything about it besides returning an error.
1625 * This will be fixed with VFS changes (lookup-intent).
1628 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1629 struct iattr *sattr)
1631 struct rpc_cred *cred;
1632 struct inode *inode = dentry->d_inode;
1633 struct nfs_open_context *ctx;
1634 struct nfs4_state *state = NULL;
1637 nfs_fattr_init(fattr);
1639 cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0);
1641 return PTR_ERR(cred);
1643 /* Search for an existing open(O_WRITE) file */
1644 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1648 status = nfs4_do_setattr(inode, fattr, sattr, state);
1650 nfs_setattr_update_inode(inode, sattr);
1652 put_nfs_open_context(ctx);
1657 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1658 const struct qstr *name, struct nfs_fh *fhandle,
1659 struct nfs_fattr *fattr)
1662 struct nfs4_lookup_arg args = {
1663 .bitmask = server->attr_bitmask,
1667 struct nfs4_lookup_res res = {
1672 struct rpc_message msg = {
1673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1678 nfs_fattr_init(fattr);
1680 dprintk("NFS call lookupfh %s\n", name->name);
1681 status = rpc_call_sync(server->client, &msg, 0);
1682 dprintk("NFS reply lookupfh: %d\n", status);
1686 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1687 struct qstr *name, struct nfs_fh *fhandle,
1688 struct nfs_fattr *fattr)
1690 struct nfs4_exception exception = { };
1693 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1695 if (err == -NFS4ERR_MOVED) {
1699 err = nfs4_handle_exception(server, err, &exception);
1700 } while (exception.retry);
1704 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1705 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1709 dprintk("NFS call lookup %s\n", name->name);
1710 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
1711 if (status == -NFS4ERR_MOVED)
1712 status = nfs4_get_referral(dir, name, fattr, fhandle);
1713 dprintk("NFS reply lookup: %d\n", status);
1717 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1719 struct nfs4_exception exception = { };
1722 err = nfs4_handle_exception(NFS_SERVER(dir),
1723 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1725 } while (exception.retry);
1729 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1731 struct nfs_server *server = NFS_SERVER(inode);
1732 struct nfs_fattr fattr;
1733 struct nfs4_accessargs args = {
1734 .fh = NFS_FH(inode),
1735 .bitmask = server->attr_bitmask,
1737 struct nfs4_accessres res = {
1741 struct rpc_message msg = {
1742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1745 .rpc_cred = entry->cred,
1747 int mode = entry->mask;
1751 * Determine which access bits we want to ask for...
1753 if (mode & MAY_READ)
1754 args.access |= NFS4_ACCESS_READ;
1755 if (S_ISDIR(inode->i_mode)) {
1756 if (mode & MAY_WRITE)
1757 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1758 if (mode & MAY_EXEC)
1759 args.access |= NFS4_ACCESS_LOOKUP;
1761 if (mode & MAY_WRITE)
1762 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1763 if (mode & MAY_EXEC)
1764 args.access |= NFS4_ACCESS_EXECUTE;
1766 nfs_fattr_init(&fattr);
1767 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1770 if (res.access & NFS4_ACCESS_READ)
1771 entry->mask |= MAY_READ;
1772 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1773 entry->mask |= MAY_WRITE;
1774 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1775 entry->mask |= MAY_EXEC;
1776 nfs_refresh_inode(inode, &fattr);
1781 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1783 struct nfs4_exception exception = { };
1786 err = nfs4_handle_exception(NFS_SERVER(inode),
1787 _nfs4_proc_access(inode, entry),
1789 } while (exception.retry);
1794 * TODO: For the time being, we don't try to get any attributes
1795 * along with any of the zero-copy operations READ, READDIR,
1798 * In the case of the first three, we want to put the GETATTR
1799 * after the read-type operation -- this is because it is hard
1800 * to predict the length of a GETATTR response in v4, and thus
1801 * align the READ data correctly. This means that the GETATTR
1802 * may end up partially falling into the page cache, and we should
1803 * shift it into the 'tail' of the xdr_buf before processing.
1804 * To do this efficiently, we need to know the total length
1805 * of data received, which doesn't seem to be available outside
1808 * In the case of WRITE, we also want to put the GETATTR after
1809 * the operation -- in this case because we want to make sure
1810 * we get the post-operation mtime and size. This means that
1811 * we can't use xdr_encode_pages() as written: we need a variant
1812 * of it which would leave room in the 'tail' iovec.
1814 * Both of these changes to the XDR layer would in fact be quite
1815 * minor, but I decided to leave them for a subsequent patch.
1817 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1818 unsigned int pgbase, unsigned int pglen)
1820 struct nfs4_readlink args = {
1821 .fh = NFS_FH(inode),
1826 struct rpc_message msg = {
1827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1832 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1835 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1836 unsigned int pgbase, unsigned int pglen)
1838 struct nfs4_exception exception = { };
1841 err = nfs4_handle_exception(NFS_SERVER(inode),
1842 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1844 } while (exception.retry);
1850 * We will need to arrange for the VFS layer to provide an atomic open.
1851 * Until then, this create/open method is prone to inefficiency and race
1852 * conditions due to the lookup, create, and open VFS calls from sys_open()
1853 * placed on the wire.
1855 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1856 * The file will be opened again in the subsequent VFS open call
1857 * (nfs4_proc_file_open).
1859 * The open for read will just hang around to be used by any process that
1860 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1864 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1865 int flags, struct nameidata *nd)
1867 struct path path = {
1871 struct nfs4_state *state;
1872 struct rpc_cred *cred;
1875 cred = rpcauth_lookupcred(NFS_CLIENT(dir)->cl_auth, 0);
1877 status = PTR_ERR(cred);
1880 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1882 if (IS_ERR(state)) {
1883 status = PTR_ERR(state);
1886 d_instantiate(dentry, igrab(state->inode));
1887 if (flags & O_EXCL) {
1888 struct nfs_fattr fattr;
1889 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
1891 nfs_setattr_update_inode(state->inode, sattr);
1892 nfs_post_op_update_inode(state->inode, &fattr);
1894 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
1895 status = nfs4_intent_set_file(nd, &path, state);
1897 nfs4_close_state(&path, state, flags);
1902 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1904 struct nfs_server *server = NFS_SERVER(dir);
1905 struct nfs_removeargs args = {
1907 .name.len = name->len,
1908 .name.name = name->name,
1909 .bitmask = server->attr_bitmask,
1911 struct nfs_removeres res = {
1914 struct rpc_message msg = {
1915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1921 nfs_fattr_init(&res.dir_attr);
1922 status = rpc_call_sync(server->client, &msg, 0);
1924 update_changeattr(dir, &res.cinfo);
1925 nfs_post_op_update_inode(dir, &res.dir_attr);
1930 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1932 struct nfs4_exception exception = { };
1935 err = nfs4_handle_exception(NFS_SERVER(dir),
1936 _nfs4_proc_remove(dir, name),
1938 } while (exception.retry);
1942 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1944 struct nfs_server *server = NFS_SERVER(dir);
1945 struct nfs_removeargs *args = msg->rpc_argp;
1946 struct nfs_removeres *res = msg->rpc_resp;
1948 args->bitmask = server->attr_bitmask;
1949 res->server = server;
1950 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1953 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1955 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1957 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1959 update_changeattr(dir, &res->cinfo);
1960 nfs_post_op_update_inode(dir, &res->dir_attr);
1964 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1965 struct inode *new_dir, struct qstr *new_name)
1967 struct nfs_server *server = NFS_SERVER(old_dir);
1968 struct nfs4_rename_arg arg = {
1969 .old_dir = NFS_FH(old_dir),
1970 .new_dir = NFS_FH(new_dir),
1971 .old_name = old_name,
1972 .new_name = new_name,
1973 .bitmask = server->attr_bitmask,
1975 struct nfs_fattr old_fattr, new_fattr;
1976 struct nfs4_rename_res res = {
1978 .old_fattr = &old_fattr,
1979 .new_fattr = &new_fattr,
1981 struct rpc_message msg = {
1982 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1988 nfs_fattr_init(res.old_fattr);
1989 nfs_fattr_init(res.new_fattr);
1990 status = rpc_call_sync(server->client, &msg, 0);
1993 update_changeattr(old_dir, &res.old_cinfo);
1994 nfs_post_op_update_inode(old_dir, res.old_fattr);
1995 update_changeattr(new_dir, &res.new_cinfo);
1996 nfs_post_op_update_inode(new_dir, res.new_fattr);
2001 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2002 struct inode *new_dir, struct qstr *new_name)
2004 struct nfs4_exception exception = { };
2007 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2008 _nfs4_proc_rename(old_dir, old_name,
2011 } while (exception.retry);
2015 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2017 struct nfs_server *server = NFS_SERVER(inode);
2018 struct nfs4_link_arg arg = {
2019 .fh = NFS_FH(inode),
2020 .dir_fh = NFS_FH(dir),
2022 .bitmask = server->attr_bitmask,
2024 struct nfs_fattr fattr, dir_attr;
2025 struct nfs4_link_res res = {
2028 .dir_attr = &dir_attr,
2030 struct rpc_message msg = {
2031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2037 nfs_fattr_init(res.fattr);
2038 nfs_fattr_init(res.dir_attr);
2039 status = rpc_call_sync(server->client, &msg, 0);
2041 update_changeattr(dir, &res.cinfo);
2042 nfs_post_op_update_inode(dir, res.dir_attr);
2043 nfs_post_op_update_inode(inode, res.fattr);
2049 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2051 struct nfs4_exception exception = { };
2054 err = nfs4_handle_exception(NFS_SERVER(inode),
2055 _nfs4_proc_link(inode, dir, name),
2057 } while (exception.retry);
2061 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2062 struct page *page, unsigned int len, struct iattr *sattr)
2064 struct nfs_server *server = NFS_SERVER(dir);
2065 struct nfs_fh fhandle;
2066 struct nfs_fattr fattr, dir_fattr;
2067 struct nfs4_create_arg arg = {
2068 .dir_fh = NFS_FH(dir),
2070 .name = &dentry->d_name,
2073 .bitmask = server->attr_bitmask,
2075 struct nfs4_create_res res = {
2079 .dir_fattr = &dir_fattr,
2081 struct rpc_message msg = {
2082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2088 if (len > NFS4_MAXPATHLEN)
2089 return -ENAMETOOLONG;
2091 arg.u.symlink.pages = &page;
2092 arg.u.symlink.len = len;
2093 nfs_fattr_init(&fattr);
2094 nfs_fattr_init(&dir_fattr);
2096 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2098 update_changeattr(dir, &res.dir_cinfo);
2099 nfs_post_op_update_inode(dir, res.dir_fattr);
2100 status = nfs_instantiate(dentry, &fhandle, &fattr);
2105 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2106 struct page *page, unsigned int len, struct iattr *sattr)
2108 struct nfs4_exception exception = { };
2111 err = nfs4_handle_exception(NFS_SERVER(dir),
2112 _nfs4_proc_symlink(dir, dentry, page,
2115 } while (exception.retry);
2119 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2120 struct iattr *sattr)
2122 struct nfs_server *server = NFS_SERVER(dir);
2123 struct nfs_fh fhandle;
2124 struct nfs_fattr fattr, dir_fattr;
2125 struct nfs4_create_arg arg = {
2126 .dir_fh = NFS_FH(dir),
2128 .name = &dentry->d_name,
2131 .bitmask = server->attr_bitmask,
2133 struct nfs4_create_res res = {
2137 .dir_fattr = &dir_fattr,
2139 struct rpc_message msg = {
2140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2146 nfs_fattr_init(&fattr);
2147 nfs_fattr_init(&dir_fattr);
2149 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2151 update_changeattr(dir, &res.dir_cinfo);
2152 nfs_post_op_update_inode(dir, res.dir_fattr);
2153 status = nfs_instantiate(dentry, &fhandle, &fattr);
2158 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2159 struct iattr *sattr)
2161 struct nfs4_exception exception = { };
2164 err = nfs4_handle_exception(NFS_SERVER(dir),
2165 _nfs4_proc_mkdir(dir, dentry, sattr),
2167 } while (exception.retry);
2171 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2172 u64 cookie, struct page *page, unsigned int count, int plus)
2174 struct inode *dir = dentry->d_inode;
2175 struct nfs4_readdir_arg args = {
2180 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2182 struct nfs4_readdir_res res;
2183 struct rpc_message msg = {
2184 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2191 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2192 dentry->d_parent->d_name.name,
2193 dentry->d_name.name,
2194 (unsigned long long)cookie);
2195 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2196 res.pgbase = args.pgbase;
2197 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2199 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2201 nfs_invalidate_atime(dir);
2203 dprintk("%s: returns %d\n", __FUNCTION__, status);
2207 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2208 u64 cookie, struct page *page, unsigned int count, int plus)
2210 struct nfs4_exception exception = { };
2213 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2214 _nfs4_proc_readdir(dentry, cred, cookie,
2217 } while (exception.retry);
2221 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2222 struct iattr *sattr, dev_t rdev)
2224 struct nfs_server *server = NFS_SERVER(dir);
2226 struct nfs_fattr fattr, dir_fattr;
2227 struct nfs4_create_arg arg = {
2228 .dir_fh = NFS_FH(dir),
2230 .name = &dentry->d_name,
2232 .bitmask = server->attr_bitmask,
2234 struct nfs4_create_res res = {
2238 .dir_fattr = &dir_fattr,
2240 struct rpc_message msg = {
2241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2246 int mode = sattr->ia_mode;
2248 nfs_fattr_init(&fattr);
2249 nfs_fattr_init(&dir_fattr);
2251 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2252 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2254 arg.ftype = NF4FIFO;
2255 else if (S_ISBLK(mode)) {
2257 arg.u.device.specdata1 = MAJOR(rdev);
2258 arg.u.device.specdata2 = MINOR(rdev);
2260 else if (S_ISCHR(mode)) {
2262 arg.u.device.specdata1 = MAJOR(rdev);
2263 arg.u.device.specdata2 = MINOR(rdev);
2266 arg.ftype = NF4SOCK;
2268 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2270 update_changeattr(dir, &res.dir_cinfo);
2271 nfs_post_op_update_inode(dir, res.dir_fattr);
2272 status = nfs_instantiate(dentry, &fh, &fattr);
2277 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2278 struct iattr *sattr, dev_t rdev)
2280 struct nfs4_exception exception = { };
2283 err = nfs4_handle_exception(NFS_SERVER(dir),
2284 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2286 } while (exception.retry);
2290 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2291 struct nfs_fsstat *fsstat)
2293 struct nfs4_statfs_arg args = {
2295 .bitmask = server->attr_bitmask,
2297 struct rpc_message msg = {
2298 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2303 nfs_fattr_init(fsstat->fattr);
2304 return rpc_call_sync(server->client, &msg, 0);
2307 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2309 struct nfs4_exception exception = { };
2312 err = nfs4_handle_exception(server,
2313 _nfs4_proc_statfs(server, fhandle, fsstat),
2315 } while (exception.retry);
2319 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2320 struct nfs_fsinfo *fsinfo)
2322 struct nfs4_fsinfo_arg args = {
2324 .bitmask = server->attr_bitmask,
2326 struct rpc_message msg = {
2327 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2332 return rpc_call_sync(server->client, &msg, 0);
2335 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2337 struct nfs4_exception exception = { };
2341 err = nfs4_handle_exception(server,
2342 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2344 } while (exception.retry);
2348 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2350 nfs_fattr_init(fsinfo->fattr);
2351 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2354 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2355 struct nfs_pathconf *pathconf)
2357 struct nfs4_pathconf_arg args = {
2359 .bitmask = server->attr_bitmask,
2361 struct rpc_message msg = {
2362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2364 .rpc_resp = pathconf,
2367 /* None of the pathconf attributes are mandatory to implement */
2368 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2369 memset(pathconf, 0, sizeof(*pathconf));
2373 nfs_fattr_init(pathconf->fattr);
2374 return rpc_call_sync(server->client, &msg, 0);
2377 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2378 struct nfs_pathconf *pathconf)
2380 struct nfs4_exception exception = { };
2384 err = nfs4_handle_exception(server,
2385 _nfs4_proc_pathconf(server, fhandle, pathconf),
2387 } while (exception.retry);
2391 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2393 struct nfs_server *server = NFS_SERVER(data->inode);
2395 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
2396 rpc_restart_call(task);
2400 nfs_invalidate_atime(data->inode);
2401 if (task->tk_status > 0)
2402 renew_lease(server, data->timestamp);
2406 static void nfs4_proc_read_setup(struct nfs_read_data *data)
2408 struct rpc_message msg = {
2409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2410 .rpc_argp = &data->args,
2411 .rpc_resp = &data->res,
2412 .rpc_cred = data->cred,
2415 data->timestamp = jiffies;
2417 rpc_call_setup(&data->task, &msg, 0);
2420 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2422 struct inode *inode = data->inode;
2424 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2425 rpc_restart_call(task);
2428 if (task->tk_status >= 0) {
2429 renew_lease(NFS_SERVER(inode), data->timestamp);
2430 nfs_post_op_update_inode(inode, data->res.fattr);
2435 static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2437 struct rpc_message msg = {
2438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2439 .rpc_argp = &data->args,
2440 .rpc_resp = &data->res,
2441 .rpc_cred = data->cred,
2443 struct inode *inode = data->inode;
2444 struct nfs_server *server = NFS_SERVER(inode);
2447 if (how & FLUSH_STABLE) {
2448 if (!NFS_I(inode)->ncommit)
2449 stable = NFS_FILE_SYNC;
2451 stable = NFS_DATA_SYNC;
2453 stable = NFS_UNSTABLE;
2454 data->args.stable = stable;
2455 data->args.bitmask = server->attr_bitmask;
2456 data->res.server = server;
2458 data->timestamp = jiffies;
2460 /* Finalize the task. */
2461 rpc_call_setup(&data->task, &msg, 0);
2464 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2466 struct inode *inode = data->inode;
2468 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2469 rpc_restart_call(task);
2472 if (task->tk_status >= 0)
2473 nfs_post_op_update_inode(inode, data->res.fattr);
2477 static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2479 struct rpc_message msg = {
2480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2481 .rpc_argp = &data->args,
2482 .rpc_resp = &data->res,
2483 .rpc_cred = data->cred,
2485 struct nfs_server *server = NFS_SERVER(data->inode);
2487 data->args.bitmask = server->attr_bitmask;
2488 data->res.server = server;
2490 rpc_call_setup(&data->task, &msg, 0);
2494 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2495 * standalone procedure for queueing an asynchronous RENEW.
2497 static void nfs4_renew_done(struct rpc_task *task, void *data)
2499 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2500 unsigned long timestamp = (unsigned long)data;
2502 if (task->tk_status < 0) {
2503 switch (task->tk_status) {
2504 case -NFS4ERR_STALE_CLIENTID:
2505 case -NFS4ERR_EXPIRED:
2506 case -NFS4ERR_CB_PATH_DOWN:
2507 nfs4_schedule_state_recovery(clp);
2511 spin_lock(&clp->cl_lock);
2512 if (time_before(clp->cl_last_renewal,timestamp))
2513 clp->cl_last_renewal = timestamp;
2514 spin_unlock(&clp->cl_lock);
2517 static const struct rpc_call_ops nfs4_renew_ops = {
2518 .rpc_call_done = nfs4_renew_done,
2521 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2523 struct rpc_message msg = {
2524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2529 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2530 &nfs4_renew_ops, (void *)jiffies);
2533 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2535 struct rpc_message msg = {
2536 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2540 unsigned long now = jiffies;
2543 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2546 spin_lock(&clp->cl_lock);
2547 if (time_before(clp->cl_last_renewal,now))
2548 clp->cl_last_renewal = now;
2549 spin_unlock(&clp->cl_lock);
2553 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2555 return (server->caps & NFS_CAP_ACLS)
2556 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2557 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2560 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2561 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2564 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2566 static void buf_to_pages(const void *buf, size_t buflen,
2567 struct page **pages, unsigned int *pgbase)
2569 const void *p = buf;
2571 *pgbase = offset_in_page(buf);
2573 while (p < buf + buflen) {
2574 *(pages++) = virt_to_page(p);
2575 p += PAGE_CACHE_SIZE;
2579 struct nfs4_cached_acl {
2585 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2587 struct nfs_inode *nfsi = NFS_I(inode);
2589 spin_lock(&inode->i_lock);
2590 kfree(nfsi->nfs4_acl);
2591 nfsi->nfs4_acl = acl;
2592 spin_unlock(&inode->i_lock);
2595 static void nfs4_zap_acl_attr(struct inode *inode)
2597 nfs4_set_cached_acl(inode, NULL);
2600 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2602 struct nfs_inode *nfsi = NFS_I(inode);
2603 struct nfs4_cached_acl *acl;
2606 spin_lock(&inode->i_lock);
2607 acl = nfsi->nfs4_acl;
2610 if (buf == NULL) /* user is just asking for length */
2612 if (acl->cached == 0)
2614 ret = -ERANGE; /* see getxattr(2) man page */
2615 if (acl->len > buflen)
2617 memcpy(buf, acl->data, acl->len);
2621 spin_unlock(&inode->i_lock);
2625 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2627 struct nfs4_cached_acl *acl;
2629 if (buf && acl_len <= PAGE_SIZE) {
2630 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2634 memcpy(acl->data, buf, acl_len);
2636 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2643 nfs4_set_cached_acl(inode, acl);
2646 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2648 struct page *pages[NFS4ACL_MAXPAGES];
2649 struct nfs_getaclargs args = {
2650 .fh = NFS_FH(inode),
2654 size_t resp_len = buflen;
2656 struct rpc_message msg = {
2657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2659 .rpc_resp = &resp_len,
2661 struct page *localpage = NULL;
2664 if (buflen < PAGE_SIZE) {
2665 /* As long as we're doing a round trip to the server anyway,
2666 * let's be prepared for a page of acl data. */
2667 localpage = alloc_page(GFP_KERNEL);
2668 resp_buf = page_address(localpage);
2669 if (localpage == NULL)
2671 args.acl_pages[0] = localpage;
2672 args.acl_pgbase = 0;
2673 resp_len = args.acl_len = PAGE_SIZE;
2676 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2678 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2681 if (resp_len > args.acl_len)
2682 nfs4_write_cached_acl(inode, NULL, resp_len);
2684 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2687 if (resp_len > buflen)
2690 memcpy(buf, resp_buf, resp_len);
2695 __free_page(localpage);
2699 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2701 struct nfs4_exception exception = { };
2704 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2707 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2708 } while (exception.retry);
2712 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2714 struct nfs_server *server = NFS_SERVER(inode);
2717 if (!nfs4_server_supports_acls(server))
2719 ret = nfs_revalidate_inode(server, inode);
2722 ret = nfs4_read_cached_acl(inode, buf, buflen);
2725 return nfs4_get_acl_uncached(inode, buf, buflen);
2728 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2730 struct nfs_server *server = NFS_SERVER(inode);
2731 struct page *pages[NFS4ACL_MAXPAGES];
2732 struct nfs_setaclargs arg = {
2733 .fh = NFS_FH(inode),
2737 struct rpc_message msg = {
2738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2744 if (!nfs4_server_supports_acls(server))
2746 nfs_inode_return_delegation(inode);
2747 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2748 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2749 nfs_zap_caches(inode);
2753 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2755 struct nfs4_exception exception = { };
2758 err = nfs4_handle_exception(NFS_SERVER(inode),
2759 __nfs4_proc_set_acl(inode, buf, buflen),
2761 } while (exception.retry);
2766 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2768 struct nfs_client *clp = server->nfs_client;
2770 if (!clp || task->tk_status >= 0)
2772 switch(task->tk_status) {
2773 case -NFS4ERR_STALE_CLIENTID:
2774 case -NFS4ERR_STALE_STATEID:
2775 case -NFS4ERR_EXPIRED:
2776 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2777 nfs4_schedule_state_recovery(clp);
2778 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
2779 rpc_wake_up_task(task);
2780 task->tk_status = 0;
2782 case -NFS4ERR_DELAY:
2783 nfs_inc_server_stats((struct nfs_server *) server,
2785 case -NFS4ERR_GRACE:
2786 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2787 task->tk_status = 0;
2789 case -NFS4ERR_OLD_STATEID:
2790 task->tk_status = 0;
2793 task->tk_status = nfs4_map_errors(task->tk_status);
2797 static int nfs4_wait_bit_interruptible(void *word)
2799 if (signal_pending(current))
2800 return -ERESTARTSYS;
2805 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
2812 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2814 rpc_clnt_sigmask(clnt, &oldset);
2815 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2816 nfs4_wait_bit_interruptible,
2817 TASK_INTERRUPTIBLE);
2818 rpc_clnt_sigunmask(clnt, &oldset);
2820 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
2824 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2832 *timeout = NFS4_POLL_RETRY_MIN;
2833 if (*timeout > NFS4_POLL_RETRY_MAX)
2834 *timeout = NFS4_POLL_RETRY_MAX;
2835 rpc_clnt_sigmask(clnt, &oldset);
2836 if (clnt->cl_intr) {
2837 schedule_timeout_interruptible(*timeout);
2841 schedule_timeout_uninterruptible(*timeout);
2842 rpc_clnt_sigunmask(clnt, &oldset);
2847 /* This is the error handling routine for processes that are allowed
2850 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2852 struct nfs_client *clp = server->nfs_client;
2853 int ret = errorcode;
2855 exception->retry = 0;
2859 case -NFS4ERR_STALE_CLIENTID:
2860 case -NFS4ERR_STALE_STATEID:
2861 case -NFS4ERR_EXPIRED:
2862 nfs4_schedule_state_recovery(clp);
2863 ret = nfs4_wait_clnt_recover(server->client, clp);
2865 exception->retry = 1;
2867 case -NFS4ERR_FILE_OPEN:
2868 case -NFS4ERR_GRACE:
2869 case -NFS4ERR_DELAY:
2870 ret = nfs4_delay(server->client, &exception->timeout);
2873 case -NFS4ERR_OLD_STATEID:
2874 exception->retry = 1;
2876 /* We failed to handle the error */
2877 return nfs4_map_errors(ret);
2880 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2882 nfs4_verifier sc_verifier;
2883 struct nfs4_setclientid setclientid = {
2884 .sc_verifier = &sc_verifier,
2887 struct rpc_message msg = {
2888 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2889 .rpc_argp = &setclientid,
2897 p = (__be32*)sc_verifier.data;
2898 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2899 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2902 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2903 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2904 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.sin_addr),
2905 cred->cr_ops->cr_name,
2906 clp->cl_id_uniquifier);
2907 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2908 sizeof(setclientid.sc_netid), "tcp");
2909 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2910 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2911 clp->cl_ipaddr, port >> 8, port & 255);
2913 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2914 if (status != -NFS4ERR_CLID_INUSE)
2919 ssleep(clp->cl_lease_time + 1);
2921 if (++clp->cl_id_uniquifier == 0)
2927 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2929 struct nfs_fsinfo fsinfo;
2930 struct rpc_message msg = {
2931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2933 .rpc_resp = &fsinfo,
2940 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2942 spin_lock(&clp->cl_lock);
2943 clp->cl_lease_time = fsinfo.lease_time * HZ;
2944 clp->cl_last_renewal = now;
2945 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
2946 spin_unlock(&clp->cl_lock);
2951 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2956 err = _nfs4_proc_setclientid_confirm(clp, cred);
2960 case -NFS4ERR_RESOURCE:
2961 /* The IBM lawyers misread another document! */
2962 case -NFS4ERR_DELAY:
2963 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2969 struct nfs4_delegreturndata {
2970 struct nfs4_delegreturnargs args;
2971 struct nfs4_delegreturnres res;
2973 nfs4_stateid stateid;
2974 struct rpc_cred *cred;
2975 unsigned long timestamp;
2976 struct nfs_fattr fattr;
2980 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
2982 struct nfs4_delegreturndata *data = calldata;
2983 struct rpc_message msg = {
2984 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2985 .rpc_argp = &data->args,
2986 .rpc_resp = &data->res,
2987 .rpc_cred = data->cred,
2989 nfs_fattr_init(data->res.fattr);
2990 rpc_call_setup(task, &msg, 0);
2993 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2995 struct nfs4_delegreturndata *data = calldata;
2996 data->rpc_status = task->tk_status;
2997 if (data->rpc_status == 0)
2998 renew_lease(data->res.server, data->timestamp);
3001 static void nfs4_delegreturn_release(void *calldata)
3003 struct nfs4_delegreturndata *data = calldata;
3005 put_rpccred(data->cred);
3009 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3010 .rpc_call_prepare = nfs4_delegreturn_prepare,
3011 .rpc_call_done = nfs4_delegreturn_done,
3012 .rpc_release = nfs4_delegreturn_release,
3015 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3017 struct nfs4_delegreturndata *data;
3018 struct nfs_server *server = NFS_SERVER(inode);
3019 struct rpc_task *task;
3022 data = kmalloc(sizeof(*data), GFP_KERNEL);
3025 data->args.fhandle = &data->fh;
3026 data->args.stateid = &data->stateid;
3027 data->args.bitmask = server->attr_bitmask;
3028 nfs_copy_fh(&data->fh, NFS_FH(inode));
3029 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3030 data->res.fattr = &data->fattr;
3031 data->res.server = server;
3032 data->cred = get_rpccred(cred);
3033 data->timestamp = jiffies;
3034 data->rpc_status = 0;
3036 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
3038 return PTR_ERR(task);
3039 status = nfs4_wait_for_completion_rpc_task(task);
3041 status = data->rpc_status;
3043 nfs_post_op_update_inode(inode, &data->fattr);
3049 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3051 struct nfs_server *server = NFS_SERVER(inode);
3052 struct nfs4_exception exception = { };
3055 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3057 case -NFS4ERR_STALE_STATEID:
3058 case -NFS4ERR_EXPIRED:
3062 err = nfs4_handle_exception(server, err, &exception);
3063 } while (exception.retry);
3067 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3068 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3071 * sleep, with exponential backoff, and retry the LOCK operation.
3073 static unsigned long
3074 nfs4_set_lock_task_retry(unsigned long timeout)
3076 schedule_timeout_interruptible(timeout);
3078 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3079 return NFS4_LOCK_MAXTIMEOUT;
3083 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3085 struct inode *inode = state->inode;
3086 struct nfs_server *server = NFS_SERVER(inode);
3087 struct nfs_client *clp = server->nfs_client;
3088 struct nfs_lockt_args arg = {
3089 .fh = NFS_FH(inode),
3092 struct nfs_lockt_res res = {
3095 struct rpc_message msg = {
3096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3099 .rpc_cred = state->owner->so_cred,
3101 struct nfs4_lock_state *lsp;
3104 down_read(&clp->cl_sem);
3105 arg.lock_owner.clientid = clp->cl_clientid;
3106 status = nfs4_set_lock_state(state, request);
3109 lsp = request->fl_u.nfs4_fl.owner;
3110 arg.lock_owner.id = lsp->ls_id.id;
3111 status = rpc_call_sync(server->client, &msg, 0);
3114 request->fl_type = F_UNLCK;
3116 case -NFS4ERR_DENIED:
3119 request->fl_ops->fl_release_private(request);
3121 up_read(&clp->cl_sem);
3125 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3127 struct nfs4_exception exception = { };
3131 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3132 _nfs4_proc_getlk(state, cmd, request),
3134 } while (exception.retry);
3138 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3141 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3143 res = posix_lock_file_wait(file, fl);
3146 res = flock_lock_file_wait(file, fl);
3154 struct nfs4_unlockdata {
3155 struct nfs_locku_args arg;
3156 struct nfs_locku_res res;
3157 struct nfs4_lock_state *lsp;
3158 struct nfs_open_context *ctx;
3159 struct file_lock fl;
3160 const struct nfs_server *server;
3161 unsigned long timestamp;
3164 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3165 struct nfs_open_context *ctx,
3166 struct nfs4_lock_state *lsp,
3167 struct nfs_seqid *seqid)
3169 struct nfs4_unlockdata *p;
3170 struct inode *inode = lsp->ls_state->inode;
3172 p = kmalloc(sizeof(*p), GFP_KERNEL);
3175 p->arg.fh = NFS_FH(inode);
3177 p->arg.seqid = seqid;
3178 p->arg.stateid = &lsp->ls_stateid;
3180 atomic_inc(&lsp->ls_count);
3181 /* Ensure we don't close file until we're done freeing locks! */
3182 p->ctx = get_nfs_open_context(ctx);
3183 memcpy(&p->fl, fl, sizeof(p->fl));
3184 p->server = NFS_SERVER(inode);
3188 static void nfs4_locku_release_calldata(void *data)
3190 struct nfs4_unlockdata *calldata = data;
3191 nfs_free_seqid(calldata->arg.seqid);
3192 nfs4_put_lock_state(calldata->lsp);
3193 put_nfs_open_context(calldata->ctx);
3197 static void nfs4_locku_done(struct rpc_task *task, void *data)
3199 struct nfs4_unlockdata *calldata = data;
3201 if (RPC_ASSASSINATED(task))
3203 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
3204 switch (task->tk_status) {
3206 memcpy(calldata->lsp->ls_stateid.data,
3207 calldata->res.stateid.data,
3208 sizeof(calldata->lsp->ls_stateid.data));
3209 renew_lease(calldata->server, calldata->timestamp);
3211 case -NFS4ERR_STALE_STATEID:
3212 case -NFS4ERR_EXPIRED:
3215 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
3216 rpc_restart_call(task);
3220 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3222 struct nfs4_unlockdata *calldata = data;
3223 struct rpc_message msg = {
3224 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3225 .rpc_argp = &calldata->arg,
3226 .rpc_resp = &calldata->res,
3227 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
3230 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3232 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3233 /* Note: exit _without_ running nfs4_locku_done */
3234 task->tk_action = NULL;
3237 calldata->timestamp = jiffies;
3238 rpc_call_setup(task, &msg, 0);
3241 static const struct rpc_call_ops nfs4_locku_ops = {
3242 .rpc_call_prepare = nfs4_locku_prepare,
3243 .rpc_call_done = nfs4_locku_done,
3244 .rpc_release = nfs4_locku_release_calldata,
3247 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3248 struct nfs_open_context *ctx,
3249 struct nfs4_lock_state *lsp,
3250 struct nfs_seqid *seqid)
3252 struct nfs4_unlockdata *data;
3254 /* Ensure this is an unlock - when canceling a lock, the
3255 * canceled lock is passed in, and it won't be an unlock.
3257 fl->fl_type = F_UNLCK;
3259 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3261 nfs_free_seqid(seqid);
3262 return ERR_PTR(-ENOMEM);
3265 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
3268 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3270 struct nfs_seqid *seqid;
3271 struct nfs4_lock_state *lsp;
3272 struct rpc_task *task;
3275 status = nfs4_set_lock_state(state, request);
3276 /* Unlock _before_ we do the RPC call */
3277 request->fl_flags |= FL_EXISTS;
3278 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3282 /* Is this a delegated lock? */
3283 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3285 lsp = request->fl_u.nfs4_fl.owner;
3286 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3290 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3291 status = PTR_ERR(task);
3294 status = nfs4_wait_for_completion_rpc_task(task);
3300 struct nfs4_lockdata {
3301 struct nfs_lock_args arg;
3302 struct nfs_lock_res res;
3303 struct nfs4_lock_state *lsp;
3304 struct nfs_open_context *ctx;
3305 struct file_lock fl;
3306 unsigned long timestamp;
3311 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3312 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3314 struct nfs4_lockdata *p;
3315 struct inode *inode = lsp->ls_state->inode;
3316 struct nfs_server *server = NFS_SERVER(inode);
3318 p = kzalloc(sizeof(*p), GFP_KERNEL);
3322 p->arg.fh = NFS_FH(inode);
3324 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3325 if (p->arg.lock_seqid == NULL)
3327 p->arg.lock_stateid = &lsp->ls_stateid;
3328 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3329 p->arg.lock_owner.id = lsp->ls_id.id;
3331 atomic_inc(&lsp->ls_count);
3332 p->ctx = get_nfs_open_context(ctx);
3333 memcpy(&p->fl, fl, sizeof(p->fl));
3340 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3342 struct nfs4_lockdata *data = calldata;
3343 struct nfs4_state *state = data->lsp->ls_state;
3344 struct nfs4_state_owner *sp = state->owner;
3345 struct rpc_message msg = {
3346 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3347 .rpc_argp = &data->arg,
3348 .rpc_resp = &data->res,
3349 .rpc_cred = sp->so_cred,
3352 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3354 dprintk("%s: begin!\n", __FUNCTION__);
3355 /* Do we need to do an open_to_lock_owner? */
3356 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3357 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3358 if (data->arg.open_seqid == NULL) {
3359 data->rpc_status = -ENOMEM;
3360 task->tk_action = NULL;
3363 data->arg.open_stateid = &state->stateid;
3364 data->arg.new_lock_owner = 1;
3366 data->timestamp = jiffies;
3367 rpc_call_setup(task, &msg, 0);
3369 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3372 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3374 struct nfs4_lockdata *data = calldata;
3376 dprintk("%s: begin!\n", __FUNCTION__);
3378 data->rpc_status = task->tk_status;
3379 if (RPC_ASSASSINATED(task))
3381 if (data->arg.new_lock_owner != 0) {
3382 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3383 if (data->rpc_status == 0)
3384 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3388 if (data->rpc_status == 0) {
3389 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3390 sizeof(data->lsp->ls_stateid.data));
3391 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3392 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3394 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3396 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3399 static void nfs4_lock_release(void *calldata)
3401 struct nfs4_lockdata *data = calldata;
3403 dprintk("%s: begin!\n", __FUNCTION__);
3404 if (data->arg.open_seqid != NULL)
3405 nfs_free_seqid(data->arg.open_seqid);
3406 if (data->cancelled != 0) {
3407 struct rpc_task *task;
3408 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3409 data->arg.lock_seqid);
3412 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3414 nfs_free_seqid(data->arg.lock_seqid);
3415 nfs4_put_lock_state(data->lsp);
3416 put_nfs_open_context(data->ctx);
3418 dprintk("%s: done!\n", __FUNCTION__);
3421 static const struct rpc_call_ops nfs4_lock_ops = {
3422 .rpc_call_prepare = nfs4_lock_prepare,
3423 .rpc_call_done = nfs4_lock_done,
3424 .rpc_release = nfs4_lock_release,
3427 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3429 struct nfs4_lockdata *data;
3430 struct rpc_task *task;
3433 dprintk("%s: begin!\n", __FUNCTION__);
3434 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3435 fl->fl_u.nfs4_fl.owner);
3439 data->arg.block = 1;
3441 data->arg.reclaim = 1;
3442 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3443 &nfs4_lock_ops, data);
3445 return PTR_ERR(task);
3446 ret = nfs4_wait_for_completion_rpc_task(task);
3448 ret = data->rpc_status;
3449 if (ret == -NFS4ERR_DENIED)
3452 data->cancelled = 1;
3454 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3458 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3460 struct nfs_server *server = NFS_SERVER(state->inode);
3461 struct nfs4_exception exception = { };
3465 /* Cache the lock if possible... */
3466 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3468 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3469 if (err != -NFS4ERR_DELAY)
3471 nfs4_handle_exception(server, err, &exception);
3472 } while (exception.retry);
3476 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3478 struct nfs_server *server = NFS_SERVER(state->inode);
3479 struct nfs4_exception exception = { };
3482 err = nfs4_set_lock_state(state, request);
3486 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3488 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3489 if (err != -NFS4ERR_DELAY)
3491 nfs4_handle_exception(server, err, &exception);
3492 } while (exception.retry);
3496 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3498 struct nfs_client *clp = state->owner->so_client;
3499 unsigned char fl_flags = request->fl_flags;
3502 /* Is this a delegated open? */
3503 status = nfs4_set_lock_state(state, request);
3506 request->fl_flags |= FL_ACCESS;
3507 status = do_vfs_lock(request->fl_file, request);
3510 down_read(&clp->cl_sem);
3511 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3512 struct nfs_inode *nfsi = NFS_I(state->inode);
3513 /* Yes: cache locks! */
3514 down_read(&nfsi->rwsem);
3515 /* ...but avoid races with delegation recall... */
3516 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3517 request->fl_flags = fl_flags & ~FL_SLEEP;
3518 status = do_vfs_lock(request->fl_file, request);
3519 up_read(&nfsi->rwsem);
3522 up_read(&nfsi->rwsem);
3524 status = _nfs4_do_setlk(state, cmd, request, 0);
3527 /* Note: we always want to sleep here! */
3528 request->fl_flags = fl_flags | FL_SLEEP;
3529 if (do_vfs_lock(request->fl_file, request) < 0)
3530 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3532 up_read(&clp->cl_sem);
3534 request->fl_flags = fl_flags;
3538 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3540 struct nfs4_exception exception = { };
3544 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3545 _nfs4_proc_setlk(state, cmd, request),
3547 } while (exception.retry);
3552 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3554 struct nfs_open_context *ctx;
3555 struct nfs4_state *state;
3556 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3559 /* verify open state */
3560 ctx = nfs_file_open_context(filp);
3563 if (request->fl_start < 0 || request->fl_end < 0)
3567 return nfs4_proc_getlk(state, F_GETLK, request);
3569 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3572 if (request->fl_type == F_UNLCK)
3573 return nfs4_proc_unlck(state, cmd, request);
3576 status = nfs4_proc_setlk(state, cmd, request);
3577 if ((status != -EAGAIN) || IS_SETLK(cmd))
3579 timeout = nfs4_set_lock_task_retry(timeout);
3580 status = -ERESTARTSYS;
3583 } while(status < 0);
3587 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3589 struct nfs_server *server = NFS_SERVER(state->inode);
3590 struct nfs4_exception exception = { };
3593 err = nfs4_set_lock_state(state, fl);
3597 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3598 if (err != -NFS4ERR_DELAY)
3600 err = nfs4_handle_exception(server, err, &exception);
3601 } while (exception.retry);
3606 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3608 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3609 size_t buflen, int flags)
3611 struct inode *inode = dentry->d_inode;
3613 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3616 if (!S_ISREG(inode->i_mode) &&
3617 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3620 return nfs4_proc_set_acl(inode, buf, buflen);
3623 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3624 * and that's what we'll do for e.g. user attributes that haven't been set.
3625 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3626 * attributes in kernel-managed attribute namespaces. */
3627 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3630 struct inode *inode = dentry->d_inode;
3632 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3635 return nfs4_proc_get_acl(inode, buf, buflen);
3638 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3640 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3642 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3644 if (buf && buflen < len)
3647 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3651 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
3652 struct nfs4_fs_locations *fs_locations, struct page *page)
3654 struct nfs_server *server = NFS_SERVER(dir);
3656 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3657 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3659 struct nfs4_fs_locations_arg args = {
3660 .dir_fh = NFS_FH(dir),
3665 struct rpc_message msg = {
3666 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3668 .rpc_resp = fs_locations,
3672 dprintk("%s: start\n", __FUNCTION__);
3673 nfs_fattr_init(&fs_locations->fattr);
3674 fs_locations->server = server;
3675 fs_locations->nlocations = 0;
3676 status = rpc_call_sync(server->client, &msg, 0);
3677 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3681 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3682 .recover_open = nfs4_open_reclaim,
3683 .recover_lock = nfs4_lock_reclaim,
3686 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3687 .recover_open = nfs4_open_expired,
3688 .recover_lock = nfs4_lock_expired,
3691 static const struct inode_operations nfs4_file_inode_operations = {
3692 .permission = nfs_permission,
3693 .getattr = nfs_getattr,
3694 .setattr = nfs_setattr,
3695 .getxattr = nfs4_getxattr,
3696 .setxattr = nfs4_setxattr,
3697 .listxattr = nfs4_listxattr,
3700 const struct nfs_rpc_ops nfs_v4_clientops = {
3701 .version = 4, /* protocol version */
3702 .dentry_ops = &nfs4_dentry_operations,
3703 .dir_inode_ops = &nfs4_dir_inode_operations,
3704 .file_inode_ops = &nfs4_file_inode_operations,
3705 .getroot = nfs4_proc_get_root,
3706 .getattr = nfs4_proc_getattr,
3707 .setattr = nfs4_proc_setattr,
3708 .lookupfh = nfs4_proc_lookupfh,
3709 .lookup = nfs4_proc_lookup,
3710 .access = nfs4_proc_access,
3711 .readlink = nfs4_proc_readlink,
3712 .create = nfs4_proc_create,
3713 .remove = nfs4_proc_remove,
3714 .unlink_setup = nfs4_proc_unlink_setup,
3715 .unlink_done = nfs4_proc_unlink_done,
3716 .rename = nfs4_proc_rename,
3717 .link = nfs4_proc_link,
3718 .symlink = nfs4_proc_symlink,
3719 .mkdir = nfs4_proc_mkdir,
3720 .rmdir = nfs4_proc_remove,
3721 .readdir = nfs4_proc_readdir,
3722 .mknod = nfs4_proc_mknod,
3723 .statfs = nfs4_proc_statfs,
3724 .fsinfo = nfs4_proc_fsinfo,
3725 .pathconf = nfs4_proc_pathconf,
3726 .set_capabilities = nfs4_server_capabilities,
3727 .decode_dirent = nfs4_decode_dirent,
3728 .read_setup = nfs4_proc_read_setup,
3729 .read_done = nfs4_read_done,
3730 .write_setup = nfs4_proc_write_setup,
3731 .write_done = nfs4_write_done,
3732 .commit_setup = nfs4_proc_commit_setup,
3733 .commit_done = nfs4_commit_done,
3734 .file_open = nfs_open,
3735 .file_release = nfs_release,
3736 .lock = nfs4_proc_lock,
3737 .clear_acl_cache = nfs4_zap_acl_attr,