4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
53 #include "delegation.h"
57 #define NFSDBG_FACILITY NFSDBG_PROC
59 #define NFS4_POLL_RETRY_MIN (HZ/10)
60 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 static int _nfs4_proc_open(struct nfs4_opendata *data);
64 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
65 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
66 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
67 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp);
68 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
69 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
71 /* Prevent leaks of NFSv4 errors into userland */
72 int nfs4_map_errors(int err)
75 dprintk("%s could not handle NFSv4 error %d\n",
83 * This is our standard bitmap for GETATTR requests.
85 const u32 nfs4_fattr_bitmap[2] = {
90 | FATTR4_WORD0_FILEID,
92 | FATTR4_WORD1_NUMLINKS
94 | FATTR4_WORD1_OWNER_GROUP
96 | FATTR4_WORD1_SPACE_USED
97 | FATTR4_WORD1_TIME_ACCESS
98 | FATTR4_WORD1_TIME_METADATA
99 | FATTR4_WORD1_TIME_MODIFY
102 const u32 nfs4_statfs_bitmap[2] = {
103 FATTR4_WORD0_FILES_AVAIL
104 | FATTR4_WORD0_FILES_FREE
105 | FATTR4_WORD0_FILES_TOTAL,
106 FATTR4_WORD1_SPACE_AVAIL
107 | FATTR4_WORD1_SPACE_FREE
108 | FATTR4_WORD1_SPACE_TOTAL
111 const u32 nfs4_pathconf_bitmap[2] = {
113 | FATTR4_WORD0_MAXNAME,
117 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
118 | FATTR4_WORD0_MAXREAD
119 | FATTR4_WORD0_MAXWRITE
120 | FATTR4_WORD0_LEASE_TIME,
124 const u32 nfs4_fs_locations_bitmap[2] = {
126 | FATTR4_WORD0_CHANGE
129 | FATTR4_WORD0_FILEID
130 | FATTR4_WORD0_FS_LOCATIONS,
132 | FATTR4_WORD1_NUMLINKS
134 | FATTR4_WORD1_OWNER_GROUP
135 | FATTR4_WORD1_RAWDEV
136 | FATTR4_WORD1_SPACE_USED
137 | FATTR4_WORD1_TIME_ACCESS
138 | FATTR4_WORD1_TIME_METADATA
139 | FATTR4_WORD1_TIME_MODIFY
140 | FATTR4_WORD1_MOUNTED_ON_FILEID
143 static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
144 struct nfs4_readdir_arg *readdir)
148 BUG_ON(readdir->count < 80);
150 readdir->cookie = cookie;
151 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
156 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
161 * NFSv4 servers do not return entries for '.' and '..'
162 * Therefore, we fake these entries here. We let '.'
163 * have cookie 0 and '..' have cookie 1. Note that
164 * when talking to the server, we always send cookie 0
167 start = p = kmap_atomic(*readdir->pages, KM_USER0);
170 *p++ = xdr_one; /* next */
171 *p++ = xdr_zero; /* cookie, first word */
172 *p++ = xdr_one; /* cookie, second word */
173 *p++ = xdr_one; /* entry len */
174 memcpy(p, ".\0\0\0", 4); /* entry */
176 *p++ = xdr_one; /* bitmap length */
177 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
178 *p++ = htonl(8); /* attribute buffer length */
179 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
182 *p++ = xdr_one; /* next */
183 *p++ = xdr_zero; /* cookie, first word */
184 *p++ = xdr_two; /* cookie, second word */
185 *p++ = xdr_two; /* entry len */
186 memcpy(p, "..\0\0", 4); /* entry */
188 *p++ = xdr_one; /* bitmap length */
189 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
190 *p++ = htonl(8); /* attribute buffer length */
191 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
193 readdir->pgbase = (char *)p - (char *)start;
194 readdir->count -= readdir->pgbase;
195 kunmap_atomic(start, KM_USER0);
198 static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
200 struct nfs_client *clp = server->nfs_client;
201 spin_lock(&clp->cl_lock);
202 if (time_before(clp->cl_last_renewal,timestamp))
203 clp->cl_last_renewal = timestamp;
204 spin_unlock(&clp->cl_lock);
207 static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
209 struct nfs_inode *nfsi = NFS_I(dir);
211 spin_lock(&dir->i_lock);
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 nfs_force_lookup_revalidate(dir);
215 nfsi->change_attr = cinfo->after;
216 spin_unlock(&dir->i_lock);
219 struct nfs4_opendata {
221 struct nfs_openargs o_arg;
222 struct nfs_openres o_res;
223 struct nfs_open_confirmargs c_arg;
224 struct nfs_open_confirmres c_res;
225 struct nfs_fattr f_attr;
226 struct nfs_fattr dir_attr;
229 struct nfs4_state_owner *owner;
230 struct nfs4_state *state;
232 unsigned long timestamp;
233 unsigned int rpc_done : 1;
239 static void nfs4_init_opendata_res(struct nfs4_opendata *p)
241 p->o_res.f_attr = &p->f_attr;
242 p->o_res.dir_attr = &p->dir_attr;
243 p->o_res.seqid = p->o_arg.seqid;
244 p->c_res.seqid = p->c_arg.seqid;
245 p->o_res.server = p->o_arg.server;
246 nfs_fattr_init(&p->f_attr);
247 nfs_fattr_init(&p->dir_attr);
250 static struct nfs4_opendata *nfs4_opendata_alloc(struct path *path,
251 struct nfs4_state_owner *sp, int flags,
252 const struct iattr *attrs)
254 struct dentry *parent = dget_parent(path->dentry);
255 struct inode *dir = parent->d_inode;
256 struct nfs_server *server = NFS_SERVER(dir);
257 struct nfs4_opendata *p;
259 p = kzalloc(sizeof(*p), GFP_KERNEL);
262 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
263 if (p->o_arg.seqid == NULL)
265 p->path.mnt = mntget(path->mnt);
266 p->path.dentry = dget(path->dentry);
269 atomic_inc(&sp->so_count);
270 p->o_arg.fh = NFS_FH(dir);
271 p->o_arg.open_flags = flags,
272 p->o_arg.clientid = server->nfs_client->cl_clientid;
273 p->o_arg.id = sp->so_owner_id.id;
274 p->o_arg.name = &p->path.dentry->d_name;
275 p->o_arg.server = server;
276 p->o_arg.bitmask = server->attr_bitmask;
277 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
278 if (flags & O_EXCL) {
279 u32 *s = (u32 *) p->o_arg.u.verifier.data;
282 } else if (flags & O_CREAT) {
283 p->o_arg.u.attrs = &p->attrs;
284 memcpy(&p->attrs, attrs, sizeof(p->attrs));
286 p->c_arg.fh = &p->o_res.fh;
287 p->c_arg.stateid = &p->o_res.stateid;
288 p->c_arg.seqid = p->o_arg.seqid;
289 nfs4_init_opendata_res(p);
299 static void nfs4_opendata_free(struct kref *kref)
301 struct nfs4_opendata *p = container_of(kref,
302 struct nfs4_opendata, kref);
304 nfs_free_seqid(p->o_arg.seqid);
305 if (p->state != NULL)
306 nfs4_put_open_state(p->state);
307 nfs4_put_state_owner(p->owner);
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)
323 ret = rpc_wait_for_completion_task(task);
327 static int can_open_cached(struct nfs4_state *state, int mode)
330 switch (mode & (FMODE_READ|FMODE_WRITE|O_EXCL)) {
332 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0;
335 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0;
337 case FMODE_READ|FMODE_WRITE:
338 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0;
343 static int can_open_delegated(struct nfs_delegation *delegation, mode_t open_flags)
345 if ((delegation->type & open_flags) != open_flags)
347 if (delegation->flags & NFS_DELEGATION_NEED_RECLAIM)
352 static void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
354 switch (open_flags) {
361 case FMODE_READ|FMODE_WRITE:
364 nfs4_state_set_mode_locked(state, state->state | open_flags);
367 static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
369 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
370 memcpy(state->stateid.data, stateid->data, sizeof(state->stateid.data));
371 memcpy(state->open_stateid.data, stateid->data, sizeof(state->open_stateid.data));
372 switch (open_flags) {
374 set_bit(NFS_O_RDONLY_STATE, &state->flags);
377 set_bit(NFS_O_WRONLY_STATE, &state->flags);
379 case FMODE_READ|FMODE_WRITE:
380 set_bit(NFS_O_RDWR_STATE, &state->flags);
384 static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
386 write_seqlock(&state->seqlock);
387 nfs_set_open_stateid_locked(state, stateid, open_flags);
388 write_sequnlock(&state->seqlock);
391 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *deleg_stateid, int open_flags)
393 open_flags &= (FMODE_READ|FMODE_WRITE);
395 * Protect the call to nfs4_state_set_mode_locked and
396 * serialise the stateid update
398 write_seqlock(&state->seqlock);
399 if (deleg_stateid != NULL) {
400 memcpy(state->stateid.data, deleg_stateid->data, sizeof(state->stateid.data));
401 set_bit(NFS_DELEGATED_STATE, &state->flags);
403 if (open_stateid != NULL)
404 nfs_set_open_stateid_locked(state, open_stateid, open_flags);
405 write_sequnlock(&state->seqlock);
406 spin_lock(&state->owner->so_lock);
407 update_open_stateflags(state, open_flags);
408 spin_unlock(&state->owner->so_lock);
411 static void nfs4_return_incompatible_delegation(struct inode *inode, mode_t open_flags)
413 struct nfs_delegation *delegation;
416 delegation = rcu_dereference(NFS_I(inode)->delegation);
417 if (delegation == NULL || (delegation->type & open_flags) == open_flags) {
422 nfs_inode_return_delegation(inode);
425 static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
427 struct nfs4_state *state = opendata->state;
428 struct nfs_inode *nfsi = NFS_I(state->inode);
429 struct nfs_delegation *delegation;
430 int open_mode = opendata->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL);
431 nfs4_stateid stateid;
435 delegation = rcu_dereference(nfsi->delegation);
437 if (can_open_cached(state, open_mode)) {
438 spin_lock(&state->owner->so_lock);
439 if (can_open_cached(state, open_mode)) {
440 update_open_stateflags(state, open_mode);
441 spin_unlock(&state->owner->so_lock);
443 goto out_return_state;
445 spin_unlock(&state->owner->so_lock);
447 if (delegation == NULL)
449 if (!can_open_delegated(delegation, open_mode))
451 /* Save the delegation */
452 memcpy(stateid.data, delegation->stateid.data, sizeof(stateid.data));
455 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
461 delegation = rcu_dereference(nfsi->delegation);
462 /* If no delegation, try a cached open */
463 if (delegation == NULL)
465 /* Is the delegation still valid? */
466 if (memcmp(stateid.data, delegation->stateid.data, sizeof(stateid.data)) != 0)
469 update_open_stateid(state, NULL, &stateid, open_mode);
470 goto out_return_state;
476 atomic_inc(&state->count);
480 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
483 struct nfs4_state *state = NULL;
484 struct nfs_delegation *delegation;
485 nfs4_stateid *deleg_stateid = NULL;
488 if (!data->rpc_done) {
489 state = nfs4_try_open_cached(data);
494 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
496 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
497 ret = PTR_ERR(inode);
501 state = nfs4_get_open_state(inode, data->owner);
504 if (data->o_res.delegation_type != 0) {
505 int delegation_flags = 0;
508 delegation = rcu_dereference(NFS_I(inode)->delegation);
510 delegation_flags = delegation->flags;
512 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
513 nfs_inode_set_delegation(state->inode,
514 data->owner->so_cred,
517 nfs_inode_reclaim_delegation(state->inode,
518 data->owner->so_cred,
522 delegation = rcu_dereference(NFS_I(inode)->delegation);
523 if (delegation != NULL)
524 deleg_stateid = &delegation->stateid;
525 update_open_stateid(state, &data->o_res.stateid, deleg_stateid, data->o_arg.open_flags);
536 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
538 struct nfs_inode *nfsi = NFS_I(state->inode);
539 struct nfs_open_context *ctx;
541 spin_lock(&state->inode->i_lock);
542 list_for_each_entry(ctx, &nfsi->open_files, list) {
543 if (ctx->state != state)
545 get_nfs_open_context(ctx);
546 spin_unlock(&state->inode->i_lock);
549 spin_unlock(&state->inode->i_lock);
550 return ERR_PTR(-ENOENT);
553 static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
555 struct nfs4_opendata *opendata;
557 opendata = nfs4_opendata_alloc(&ctx->path, state->owner, 0, NULL);
558 if (opendata == NULL)
559 return ERR_PTR(-ENOMEM);
560 opendata->state = state;
561 atomic_inc(&state->count);
565 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, struct nfs4_state **res)
567 struct nfs4_state *newstate;
570 opendata->o_arg.open_flags = openflags;
571 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
572 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
573 nfs4_init_opendata_res(opendata);
574 ret = _nfs4_proc_open(opendata);
577 newstate = nfs4_opendata_to_nfs4_state(opendata);
578 if (IS_ERR(newstate))
579 return PTR_ERR(newstate);
580 nfs4_close_state(&opendata->path, newstate, openflags);
585 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
587 struct nfs4_state *newstate;
590 /* memory barrier prior to reading state->n_* */
591 clear_bit(NFS_DELEGATED_STATE, &state->flags);
593 if (state->n_rdwr != 0) {
594 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
597 if (newstate != state)
600 if (state->n_wronly != 0) {
601 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
604 if (newstate != state)
607 if (state->n_rdonly != 0) {
608 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
611 if (newstate != state)
615 * We may have performed cached opens for all three recoveries.
616 * Check if we need to update the current stateid.
618 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
619 memcmp(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data)) != 0) {
620 write_seqlock(&state->seqlock);
621 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
622 memcpy(state->stateid.data, state->open_stateid.data, sizeof(state->stateid.data));
623 write_sequnlock(&state->seqlock);
630 * reclaim state on the server after a reboot.
632 static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
634 struct nfs_delegation *delegation;
635 struct nfs4_opendata *opendata;
636 int delegation_type = 0;
639 opendata = nfs4_open_recoverdata_alloc(ctx, state);
640 if (IS_ERR(opendata))
641 return PTR_ERR(opendata);
642 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
643 opendata->o_arg.fh = NFS_FH(state->inode);
645 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
646 if (delegation != NULL && (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) != 0)
647 delegation_type = delegation->type;
649 opendata->o_arg.u.delegation_type = delegation_type;
650 status = nfs4_open_recover(opendata, state);
651 nfs4_opendata_put(opendata);
655 static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
657 struct nfs_server *server = NFS_SERVER(state->inode);
658 struct nfs4_exception exception = { };
661 err = _nfs4_do_open_reclaim(ctx, state);
662 if (err != -NFS4ERR_DELAY)
664 nfs4_handle_exception(server, err, &exception);
665 } while (exception.retry);
669 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
671 struct nfs_open_context *ctx;
674 ctx = nfs4_state_find_open_context(state);
677 ret = nfs4_do_open_reclaim(ctx, state);
678 put_nfs_open_context(ctx);
682 static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
684 struct nfs4_opendata *opendata;
687 opendata = nfs4_open_recoverdata_alloc(ctx, state);
688 if (IS_ERR(opendata))
689 return PTR_ERR(opendata);
690 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
691 memcpy(opendata->o_arg.u.delegation.data, stateid->data,
692 sizeof(opendata->o_arg.u.delegation.data));
693 ret = nfs4_open_recover(opendata, state);
694 nfs4_opendata_put(opendata);
698 int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
700 struct nfs4_exception exception = { };
701 struct nfs_server *server = NFS_SERVER(state->inode);
704 err = _nfs4_open_delegation_recall(ctx, state, stateid);
708 case -NFS4ERR_STALE_CLIENTID:
709 case -NFS4ERR_STALE_STATEID:
710 case -NFS4ERR_EXPIRED:
711 /* Don't recall a delegation if it was lost */
712 nfs4_schedule_state_recovery(server->nfs_client);
715 err = nfs4_handle_exception(server, err, &exception);
716 } while (exception.retry);
720 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
722 struct nfs4_opendata *data = calldata;
724 data->rpc_status = task->tk_status;
725 if (RPC_ASSASSINATED(task))
727 if (data->rpc_status == 0) {
728 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
729 sizeof(data->o_res.stateid.data));
730 nfs_confirm_seqid(&data->owner->so_seqid, 0);
731 renew_lease(data->o_res.server, data->timestamp);
736 static void nfs4_open_confirm_release(void *calldata)
738 struct nfs4_opendata *data = calldata;
739 struct nfs4_state *state = NULL;
741 /* If this request hasn't been cancelled, do nothing */
742 if (data->cancelled == 0)
744 /* In case of error, no cleanup! */
747 state = nfs4_opendata_to_nfs4_state(data);
749 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
751 nfs4_opendata_put(data);
754 static const struct rpc_call_ops nfs4_open_confirm_ops = {
755 .rpc_call_done = nfs4_open_confirm_done,
756 .rpc_release = nfs4_open_confirm_release,
760 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
762 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
764 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
765 struct rpc_task *task;
766 struct rpc_message msg = {
767 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
768 .rpc_argp = &data->c_arg,
769 .rpc_resp = &data->c_res,
770 .rpc_cred = data->owner->so_cred,
772 struct rpc_task_setup task_setup_data = {
773 .rpc_client = server->client,
775 .callback_ops = &nfs4_open_confirm_ops,
776 .callback_data = data,
777 .workqueue = nfsiod_workqueue,
778 .flags = RPC_TASK_ASYNC,
782 kref_get(&data->kref);
784 data->rpc_status = 0;
785 data->timestamp = jiffies;
786 task = rpc_run_task(&task_setup_data);
788 return PTR_ERR(task);
789 status = nfs4_wait_for_completion_rpc_task(task);
794 status = data->rpc_status;
799 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
801 struct nfs4_opendata *data = calldata;
802 struct nfs4_state_owner *sp = data->owner;
804 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
807 * Check if we still need to send an OPEN call, or if we can use
808 * a delegation instead.
810 if (data->state != NULL) {
811 struct nfs_delegation *delegation;
813 if (can_open_cached(data->state, data->o_arg.open_flags & (FMODE_READ|FMODE_WRITE|O_EXCL)))
816 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
817 if (delegation != NULL &&
818 (delegation->flags & NFS_DELEGATION_NEED_RECLAIM) == 0) {
824 /* Update sequence id. */
825 data->o_arg.id = sp->so_owner_id.id;
826 data->o_arg.clientid = sp->so_client->cl_clientid;
827 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
828 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
829 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
831 data->timestamp = jiffies;
832 rpc_call_start(task);
835 task->tk_action = NULL;
839 static void nfs4_open_done(struct rpc_task *task, void *calldata)
841 struct nfs4_opendata *data = calldata;
843 data->rpc_status = task->tk_status;
844 if (RPC_ASSASSINATED(task))
846 if (task->tk_status == 0) {
847 switch (data->o_res.f_attr->mode & S_IFMT) {
851 data->rpc_status = -ELOOP;
854 data->rpc_status = -EISDIR;
857 data->rpc_status = -ENOTDIR;
859 renew_lease(data->o_res.server, data->timestamp);
860 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
861 nfs_confirm_seqid(&data->owner->so_seqid, 0);
866 static void nfs4_open_release(void *calldata)
868 struct nfs4_opendata *data = calldata;
869 struct nfs4_state *state = NULL;
871 /* If this request hasn't been cancelled, do nothing */
872 if (data->cancelled == 0)
874 /* In case of error, no cleanup! */
875 if (data->rpc_status != 0 || !data->rpc_done)
877 /* In case we need an open_confirm, no cleanup! */
878 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
880 state = nfs4_opendata_to_nfs4_state(data);
882 nfs4_close_state(&data->path, state, data->o_arg.open_flags);
884 nfs4_opendata_put(data);
887 static const struct rpc_call_ops nfs4_open_ops = {
888 .rpc_call_prepare = nfs4_open_prepare,
889 .rpc_call_done = nfs4_open_done,
890 .rpc_release = nfs4_open_release,
894 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
896 static int _nfs4_proc_open(struct nfs4_opendata *data)
898 struct inode *dir = data->dir->d_inode;
899 struct nfs_server *server = NFS_SERVER(dir);
900 struct nfs_openargs *o_arg = &data->o_arg;
901 struct nfs_openres *o_res = &data->o_res;
902 struct rpc_task *task;
903 struct rpc_message msg = {
904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
907 .rpc_cred = data->owner->so_cred,
909 struct rpc_task_setup task_setup_data = {
910 .rpc_client = server->client,
912 .callback_ops = &nfs4_open_ops,
913 .callback_data = data,
914 .workqueue = nfsiod_workqueue,
915 .flags = RPC_TASK_ASYNC,
919 kref_get(&data->kref);
921 data->rpc_status = 0;
923 task = rpc_run_task(&task_setup_data);
925 return PTR_ERR(task);
926 status = nfs4_wait_for_completion_rpc_task(task);
931 status = data->rpc_status;
933 if (status != 0 || !data->rpc_done)
936 if (o_res->fh.size == 0)
937 _nfs4_proc_lookup(dir, o_arg->name, &o_res->fh, o_res->f_attr);
939 if (o_arg->open_flags & O_CREAT) {
940 update_changeattr(dir, &o_res->cinfo);
941 nfs_post_op_update_inode(dir, o_res->dir_attr);
943 nfs_refresh_inode(dir, o_res->dir_attr);
944 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
945 status = _nfs4_proc_open_confirm(data);
949 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
950 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
954 static int nfs4_recover_expired_lease(struct nfs_server *server)
956 struct nfs_client *clp = server->nfs_client;
960 ret = nfs4_wait_clnt_recover(server->client, clp);
963 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
965 nfs4_schedule_state_recovery(clp);
972 * reclaim state on the server after a network partition.
973 * Assumes caller holds the appropriate lock
975 static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
977 struct nfs4_opendata *opendata;
980 opendata = nfs4_open_recoverdata_alloc(ctx, state);
981 if (IS_ERR(opendata))
982 return PTR_ERR(opendata);
983 ret = nfs4_open_recover(opendata, state);
985 d_drop(ctx->path.dentry);
986 nfs4_opendata_put(opendata);
990 static inline int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
992 struct nfs_server *server = NFS_SERVER(state->inode);
993 struct nfs4_exception exception = { };
997 err = _nfs4_open_expired(ctx, state);
998 if (err == -NFS4ERR_DELAY)
999 nfs4_handle_exception(server, err, &exception);
1000 } while (exception.retry);
1004 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1006 struct nfs_open_context *ctx;
1009 ctx = nfs4_state_find_open_context(state);
1011 return PTR_ERR(ctx);
1012 ret = nfs4_do_open_expired(ctx, state);
1013 put_nfs_open_context(ctx);
1018 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1019 * fields corresponding to attributes that were used to store the verifier.
1020 * Make sure we clobber those fields in the later setattr call
1022 static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1024 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1025 !(sattr->ia_valid & ATTR_ATIME_SET))
1026 sattr->ia_valid |= ATTR_ATIME;
1028 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1029 !(sattr->ia_valid & ATTR_MTIME_SET))
1030 sattr->ia_valid |= ATTR_MTIME;
1034 * Returns a referenced nfs4_state
1036 static int _nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
1038 struct nfs4_state_owner *sp;
1039 struct nfs4_state *state = NULL;
1040 struct nfs_server *server = NFS_SERVER(dir);
1041 struct nfs_client *clp = server->nfs_client;
1042 struct nfs4_opendata *opendata;
1045 /* Protect against reboot recovery conflicts */
1047 if (!(sp = nfs4_get_state_owner(server, cred))) {
1048 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1051 status = nfs4_recover_expired_lease(server);
1053 goto err_put_state_owner;
1054 if (path->dentry->d_inode != NULL)
1055 nfs4_return_incompatible_delegation(path->dentry->d_inode, flags & (FMODE_READ|FMODE_WRITE));
1056 down_read(&clp->cl_sem);
1058 opendata = nfs4_opendata_alloc(path, sp, flags, sattr);
1059 if (opendata == NULL)
1060 goto err_release_rwsem;
1062 if (path->dentry->d_inode != NULL)
1063 opendata->state = nfs4_get_open_state(path->dentry->d_inode, sp);
1065 status = _nfs4_proc_open(opendata);
1067 goto err_opendata_put;
1069 if (opendata->o_arg.open_flags & O_EXCL)
1070 nfs4_exclusive_attrset(opendata, sattr);
1072 state = nfs4_opendata_to_nfs4_state(opendata);
1073 status = PTR_ERR(state);
1075 goto err_opendata_put;
1076 nfs4_opendata_put(opendata);
1077 nfs4_put_state_owner(sp);
1078 up_read(&clp->cl_sem);
1082 nfs4_opendata_put(opendata);
1084 up_read(&clp->cl_sem);
1085 err_put_state_owner:
1086 nfs4_put_state_owner(sp);
1093 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct path *path, int flags, struct iattr *sattr, struct rpc_cred *cred)
1095 struct nfs4_exception exception = { };
1096 struct nfs4_state *res;
1100 status = _nfs4_do_open(dir, path, flags, sattr, cred, &res);
1103 /* NOTE: BAD_SEQID means the server and client disagree about the
1104 * book-keeping w.r.t. state-changing operations
1105 * (OPEN/CLOSE/LOCK/LOCKU...)
1106 * It is actually a sign of a bug on the client or on the server.
1108 * If we receive a BAD_SEQID error in the particular case of
1109 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1110 * have unhashed the old state_owner for us, and that we can
1111 * therefore safely retry using a new one. We should still warn
1112 * the user though...
1114 if (status == -NFS4ERR_BAD_SEQID) {
1115 printk(KERN_WARNING "NFS: v4 server %s "
1116 " returned a bad sequence-id error!\n",
1117 NFS_SERVER(dir)->nfs_client->cl_hostname);
1118 exception.retry = 1;
1122 * BAD_STATEID on OPEN means that the server cancelled our
1123 * state before it received the OPEN_CONFIRM.
1124 * Recover by retrying the request as per the discussion
1125 * on Page 181 of RFC3530.
1127 if (status == -NFS4ERR_BAD_STATEID) {
1128 exception.retry = 1;
1131 if (status == -EAGAIN) {
1132 /* We must have found a delegation */
1133 exception.retry = 1;
1136 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1137 status, &exception));
1138 } while (exception.retry);
1142 static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1143 struct nfs_fattr *fattr, struct iattr *sattr,
1144 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],
1163 unsigned long timestamp = jiffies;
1166 nfs_fattr_init(fattr);
1168 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1169 /* Use that stateid */
1170 } else if (state != NULL) {
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 rpc_cred *cred,
1182 struct nfs_fattr *fattr, struct iattr *sattr,
1183 struct nfs4_state *state)
1185 struct nfs_server *server = NFS_SERVER(inode);
1186 struct nfs4_exception exception = { };
1189 err = nfs4_handle_exception(server,
1190 _nfs4_do_setattr(inode, cred, fattr, sattr, state),
1192 } while (exception.retry);
1196 struct nfs4_closedata {
1198 struct inode *inode;
1199 struct nfs4_state *state;
1200 struct nfs_closeargs arg;
1201 struct nfs_closeres res;
1202 struct nfs_fattr fattr;
1203 unsigned long timestamp;
1206 static void nfs4_free_closedata(void *data)
1208 struct nfs4_closedata *calldata = data;
1209 struct nfs4_state_owner *sp = calldata->state->owner;
1211 nfs4_put_open_state(calldata->state);
1212 nfs_free_seqid(calldata->arg.seqid);
1213 nfs4_put_state_owner(sp);
1214 path_put(&calldata->path);
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 switch (task->tk_status) {
1231 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
1232 renew_lease(server, calldata->timestamp);
1234 case -NFS4ERR_STALE_STATEID:
1235 case -NFS4ERR_EXPIRED:
1238 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1239 rpc_restart_call(task);
1243 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1246 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1248 struct nfs4_closedata *calldata = data;
1249 struct nfs4_state *state = calldata->state;
1250 int clear_rd, clear_wr, clear_rdwr;
1252 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1255 clear_rd = clear_wr = clear_rdwr = 0;
1256 spin_lock(&state->owner->so_lock);
1257 /* Calculate the change in open mode */
1258 if (state->n_rdwr == 0) {
1259 if (state->n_rdonly == 0) {
1260 clear_rd |= test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1261 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1263 if (state->n_wronly == 0) {
1264 clear_wr |= test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1265 clear_rdwr |= test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags);
1268 spin_unlock(&state->owner->so_lock);
1269 if (!clear_rd && !clear_wr && !clear_rdwr) {
1270 /* Note: exit _without_ calling nfs4_close_done */
1271 task->tk_action = NULL;
1274 nfs_fattr_init(calldata->res.fattr);
1275 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0) {
1276 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1277 calldata->arg.open_flags = FMODE_READ;
1278 } else if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0) {
1279 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1280 calldata->arg.open_flags = FMODE_WRITE;
1282 calldata->timestamp = jiffies;
1283 rpc_call_start(task);
1286 static const struct rpc_call_ops nfs4_close_ops = {
1287 .rpc_call_prepare = nfs4_close_prepare,
1288 .rpc_call_done = nfs4_close_done,
1289 .rpc_release = nfs4_free_closedata,
1293 * It is possible for data to be read/written from a mem-mapped file
1294 * after the sys_close call (which hits the vfs layer as a flush).
1295 * This means that we can't safely call nfsv4 close on a file until
1296 * the inode is cleared. This in turn means that we are not good
1297 * NFSv4 citizens - we do not indicate to the server to update the file's
1298 * share state even when we are done with one of the three share
1299 * stateid's in the inode.
1301 * NOTE: Caller must be holding the sp->so_owner semaphore!
1303 int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait)
1305 struct nfs_server *server = NFS_SERVER(state->inode);
1306 struct nfs4_closedata *calldata;
1307 struct nfs4_state_owner *sp = state->owner;
1308 struct rpc_task *task;
1309 struct rpc_message msg = {
1310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1311 .rpc_cred = state->owner->so_cred,
1313 struct rpc_task_setup task_setup_data = {
1314 .rpc_client = server->client,
1315 .rpc_message = &msg,
1316 .callback_ops = &nfs4_close_ops,
1317 .workqueue = nfsiod_workqueue,
1318 .flags = RPC_TASK_ASYNC,
1320 int status = -ENOMEM;
1322 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1323 if (calldata == NULL)
1325 calldata->inode = state->inode;
1326 calldata->state = state;
1327 calldata->arg.fh = NFS_FH(state->inode);
1328 calldata->arg.stateid = &state->open_stateid;
1329 /* Serialization for the sequence id */
1330 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1331 if (calldata->arg.seqid == NULL)
1332 goto out_free_calldata;
1333 calldata->arg.bitmask = server->attr_bitmask;
1334 calldata->res.fattr = &calldata->fattr;
1335 calldata->res.seqid = calldata->arg.seqid;
1336 calldata->res.server = server;
1337 calldata->path.mnt = mntget(path->mnt);
1338 calldata->path.dentry = dget(path->dentry);
1340 msg.rpc_argp = &calldata->arg,
1341 msg.rpc_resp = &calldata->res,
1342 task_setup_data.callback_data = calldata;
1343 task = rpc_run_task(&task_setup_data);
1345 return PTR_ERR(task);
1348 status = rpc_wait_for_completion_task(task);
1354 nfs4_put_open_state(state);
1355 nfs4_put_state_owner(sp);
1359 static int nfs4_intent_set_file(struct nameidata *nd, struct path *path, struct nfs4_state *state)
1364 /* If the open_intent is for execute, we have an extra check to make */
1365 if (nd->intent.open.flags & FMODE_EXEC) {
1366 ret = nfs_may_open(state->inode,
1367 state->owner->so_cred,
1368 nd->intent.open.flags);
1372 filp = lookup_instantiate_filp(nd, path->dentry, NULL);
1373 if (!IS_ERR(filp)) {
1374 struct nfs_open_context *ctx;
1375 ctx = nfs_file_open_context(filp);
1379 ret = PTR_ERR(filp);
1381 nfs4_close_sync(path, state, nd->intent.open.flags);
1386 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1388 struct path path = {
1389 .mnt = nd->path.mnt,
1392 struct dentry *parent;
1394 struct rpc_cred *cred;
1395 struct nfs4_state *state;
1398 if (nd->flags & LOOKUP_CREATE) {
1399 attr.ia_mode = nd->intent.open.create_mode;
1400 attr.ia_valid = ATTR_MODE;
1401 if (!IS_POSIXACL(dir))
1402 attr.ia_mode &= ~current->fs->umask;
1405 BUG_ON(nd->intent.open.flags & O_CREAT);
1408 cred = rpc_lookup_cred();
1410 return (struct dentry *)cred;
1411 parent = dentry->d_parent;
1412 /* Protect against concurrent sillydeletes */
1413 nfs_block_sillyrename(parent);
1414 state = nfs4_do_open(dir, &path, nd->intent.open.flags, &attr, cred);
1416 if (IS_ERR(state)) {
1417 if (PTR_ERR(state) == -ENOENT) {
1418 d_add(dentry, NULL);
1419 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1421 nfs_unblock_sillyrename(parent);
1422 return (struct dentry *)state;
1424 res = d_add_unique(dentry, igrab(state->inode));
1427 nfs_set_verifier(path.dentry, nfs_save_change_attribute(dir));
1428 nfs_unblock_sillyrename(parent);
1429 nfs4_intent_set_file(nd, &path, state);
1434 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1436 struct path path = {
1437 .mnt = nd->path.mnt,
1440 struct rpc_cred *cred;
1441 struct nfs4_state *state;
1443 cred = rpc_lookup_cred();
1445 return PTR_ERR(cred);
1446 state = nfs4_do_open(dir, &path, openflags, NULL, cred);
1448 if (IS_ERR(state)) {
1449 switch (PTR_ERR(state)) {
1455 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1461 if (state->inode == dentry->d_inode) {
1462 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1463 nfs4_intent_set_file(nd, &path, state);
1466 nfs4_close_sync(&path, state, openflags);
1473 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1475 struct nfs4_server_caps_res res = {};
1476 struct rpc_message msg = {
1477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1478 .rpc_argp = fhandle,
1483 status = rpc_call_sync(server->client, &msg, 0);
1485 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1486 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1487 server->caps |= NFS_CAP_ACLS;
1488 if (res.has_links != 0)
1489 server->caps |= NFS_CAP_HARDLINKS;
1490 if (res.has_symlinks != 0)
1491 server->caps |= NFS_CAP_SYMLINKS;
1492 server->acl_bitmask = res.acl_bitmask;
1497 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1499 struct nfs4_exception exception = { };
1502 err = nfs4_handle_exception(server,
1503 _nfs4_server_capabilities(server, fhandle),
1505 } while (exception.retry);
1509 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1510 struct nfs_fsinfo *info)
1512 struct nfs4_lookup_root_arg args = {
1513 .bitmask = nfs4_fattr_bitmap,
1515 struct nfs4_lookup_res res = {
1517 .fattr = info->fattr,
1520 struct rpc_message msg = {
1521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1525 nfs_fattr_init(info->fattr);
1526 return rpc_call_sync(server->client, &msg, 0);
1529 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1530 struct nfs_fsinfo *info)
1532 struct nfs4_exception exception = { };
1535 err = nfs4_handle_exception(server,
1536 _nfs4_lookup_root(server, fhandle, info),
1538 } while (exception.retry);
1543 * get the file handle for the "/" directory on the server
1545 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1546 struct nfs_fsinfo *info)
1550 status = nfs4_lookup_root(server, fhandle, info);
1552 status = nfs4_server_capabilities(server, fhandle);
1554 status = nfs4_do_fsinfo(server, fhandle, info);
1555 return nfs4_map_errors(status);
1559 * Get locations and (maybe) other attributes of a referral.
1560 * Note that we'll actually follow the referral later when
1561 * we detect fsid mismatch in inode revalidation
1563 static int nfs4_get_referral(struct inode *dir, const struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1565 int status = -ENOMEM;
1566 struct page *page = NULL;
1567 struct nfs4_fs_locations *locations = NULL;
1569 page = alloc_page(GFP_KERNEL);
1572 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1573 if (locations == NULL)
1576 status = nfs4_proc_fs_locations(dir, name, locations, page);
1579 /* Make sure server returned a different fsid for the referral */
1580 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1581 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__, name->name);
1586 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1587 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1589 fattr->mode = S_IFDIR;
1590 memset(fhandle, 0, sizeof(struct nfs_fh));
1599 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1601 struct nfs4_getattr_arg args = {
1603 .bitmask = server->attr_bitmask,
1605 struct nfs4_getattr_res res = {
1609 struct rpc_message msg = {
1610 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1615 nfs_fattr_init(fattr);
1616 return rpc_call_sync(server->client, &msg, 0);
1619 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1621 struct nfs4_exception exception = { };
1624 err = nfs4_handle_exception(server,
1625 _nfs4_proc_getattr(server, fhandle, fattr),
1627 } while (exception.retry);
1632 * The file is not closed if it is opened due to the a request to change
1633 * the size of the file. The open call will not be needed once the
1634 * VFS layer lookup-intents are implemented.
1636 * Close is called when the inode is destroyed.
1637 * If we haven't opened the file for O_WRONLY, we
1638 * need to in the size_change case to obtain a stateid.
1641 * Because OPEN is always done by name in nfsv4, it is
1642 * possible that we opened a different file by the same
1643 * name. We can recognize this race condition, but we
1644 * can't do anything about it besides returning an error.
1646 * This will be fixed with VFS changes (lookup-intent).
1649 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1650 struct iattr *sattr)
1652 struct inode *inode = dentry->d_inode;
1653 struct rpc_cred *cred = NULL;
1654 struct nfs4_state *state = NULL;
1657 nfs_fattr_init(fattr);
1659 /* Search for an existing open(O_WRITE) file */
1660 if (sattr->ia_valid & ATTR_FILE) {
1661 struct nfs_open_context *ctx;
1663 ctx = nfs_file_open_context(sattr->ia_file);
1668 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
1670 nfs_setattr_update_inode(inode, sattr);
1674 static int _nfs4_proc_lookupfh(struct nfs_server *server, const struct nfs_fh *dirfh,
1675 const struct qstr *name, struct nfs_fh *fhandle,
1676 struct nfs_fattr *fattr)
1679 struct nfs4_lookup_arg args = {
1680 .bitmask = server->attr_bitmask,
1684 struct nfs4_lookup_res res = {
1689 struct rpc_message msg = {
1690 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1695 nfs_fattr_init(fattr);
1697 dprintk("NFS call lookupfh %s\n", name->name);
1698 status = rpc_call_sync(server->client, &msg, 0);
1699 dprintk("NFS reply lookupfh: %d\n", status);
1703 static int nfs4_proc_lookupfh(struct nfs_server *server, struct nfs_fh *dirfh,
1704 struct qstr *name, struct nfs_fh *fhandle,
1705 struct nfs_fattr *fattr)
1707 struct nfs4_exception exception = { };
1710 err = _nfs4_proc_lookupfh(server, dirfh, name, fhandle, fattr);
1712 if (err == -NFS4ERR_MOVED) {
1716 err = nfs4_handle_exception(server, err, &exception);
1717 } while (exception.retry);
1721 static int _nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1722 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1726 dprintk("NFS call lookup %s\n", name->name);
1727 status = _nfs4_proc_lookupfh(NFS_SERVER(dir), NFS_FH(dir), name, fhandle, fattr);
1728 if (status == -NFS4ERR_MOVED)
1729 status = nfs4_get_referral(dir, name, fattr, fhandle);
1730 dprintk("NFS reply lookup: %d\n", status);
1734 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1736 struct nfs4_exception exception = { };
1739 err = nfs4_handle_exception(NFS_SERVER(dir),
1740 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1742 } while (exception.retry);
1746 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1748 struct nfs_server *server = NFS_SERVER(inode);
1749 struct nfs_fattr fattr;
1750 struct nfs4_accessargs args = {
1751 .fh = NFS_FH(inode),
1752 .bitmask = server->attr_bitmask,
1754 struct nfs4_accessres res = {
1758 struct rpc_message msg = {
1759 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1762 .rpc_cred = entry->cred,
1764 int mode = entry->mask;
1768 * Determine which access bits we want to ask for...
1770 if (mode & MAY_READ)
1771 args.access |= NFS4_ACCESS_READ;
1772 if (S_ISDIR(inode->i_mode)) {
1773 if (mode & MAY_WRITE)
1774 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1775 if (mode & MAY_EXEC)
1776 args.access |= NFS4_ACCESS_LOOKUP;
1778 if (mode & MAY_WRITE)
1779 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1780 if (mode & MAY_EXEC)
1781 args.access |= NFS4_ACCESS_EXECUTE;
1783 nfs_fattr_init(&fattr);
1784 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1787 if (res.access & NFS4_ACCESS_READ)
1788 entry->mask |= MAY_READ;
1789 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1790 entry->mask |= MAY_WRITE;
1791 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1792 entry->mask |= MAY_EXEC;
1793 nfs_refresh_inode(inode, &fattr);
1798 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1800 struct nfs4_exception exception = { };
1803 err = nfs4_handle_exception(NFS_SERVER(inode),
1804 _nfs4_proc_access(inode, entry),
1806 } while (exception.retry);
1811 * TODO: For the time being, we don't try to get any attributes
1812 * along with any of the zero-copy operations READ, READDIR,
1815 * In the case of the first three, we want to put the GETATTR
1816 * after the read-type operation -- this is because it is hard
1817 * to predict the length of a GETATTR response in v4, and thus
1818 * align the READ data correctly. This means that the GETATTR
1819 * may end up partially falling into the page cache, and we should
1820 * shift it into the 'tail' of the xdr_buf before processing.
1821 * To do this efficiently, we need to know the total length
1822 * of data received, which doesn't seem to be available outside
1825 * In the case of WRITE, we also want to put the GETATTR after
1826 * the operation -- in this case because we want to make sure
1827 * we get the post-operation mtime and size. This means that
1828 * we can't use xdr_encode_pages() as written: we need a variant
1829 * of it which would leave room in the 'tail' iovec.
1831 * Both of these changes to the XDR layer would in fact be quite
1832 * minor, but I decided to leave them for a subsequent patch.
1834 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1835 unsigned int pgbase, unsigned int pglen)
1837 struct nfs4_readlink args = {
1838 .fh = NFS_FH(inode),
1843 struct rpc_message msg = {
1844 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1849 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1852 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1853 unsigned int pgbase, unsigned int pglen)
1855 struct nfs4_exception exception = { };
1858 err = nfs4_handle_exception(NFS_SERVER(inode),
1859 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1861 } while (exception.retry);
1867 * We will need to arrange for the VFS layer to provide an atomic open.
1868 * Until then, this create/open method is prone to inefficiency and race
1869 * conditions due to the lookup, create, and open VFS calls from sys_open()
1870 * placed on the wire.
1872 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1873 * The file will be opened again in the subsequent VFS open call
1874 * (nfs4_proc_file_open).
1876 * The open for read will just hang around to be used by any process that
1877 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1881 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1882 int flags, struct nameidata *nd)
1884 struct path path = {
1885 .mnt = nd->path.mnt,
1888 struct nfs4_state *state;
1889 struct rpc_cred *cred;
1892 cred = rpc_lookup_cred();
1894 status = PTR_ERR(cred);
1897 state = nfs4_do_open(dir, &path, flags, sattr, cred);
1899 if (IS_ERR(state)) {
1900 status = PTR_ERR(state);
1903 d_add(dentry, igrab(state->inode));
1904 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
1905 if (flags & O_EXCL) {
1906 struct nfs_fattr fattr;
1907 status = nfs4_do_setattr(state->inode, cred, &fattr, sattr, state);
1909 nfs_setattr_update_inode(state->inode, sattr);
1910 nfs_post_op_update_inode(state->inode, &fattr);
1912 if (status == 0 && (nd->flags & LOOKUP_OPEN) != 0)
1913 status = nfs4_intent_set_file(nd, &path, state);
1915 nfs4_close_sync(&path, state, flags);
1922 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1924 struct nfs_server *server = NFS_SERVER(dir);
1925 struct nfs_removeargs args = {
1927 .name.len = name->len,
1928 .name.name = name->name,
1929 .bitmask = server->attr_bitmask,
1931 struct nfs_removeres res = {
1934 struct rpc_message msg = {
1935 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1941 nfs_fattr_init(&res.dir_attr);
1942 status = rpc_call_sync(server->client, &msg, 0);
1944 update_changeattr(dir, &res.cinfo);
1945 nfs_post_op_update_inode(dir, &res.dir_attr);
1950 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1952 struct nfs4_exception exception = { };
1955 err = nfs4_handle_exception(NFS_SERVER(dir),
1956 _nfs4_proc_remove(dir, name),
1958 } while (exception.retry);
1962 static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1964 struct nfs_server *server = NFS_SERVER(dir);
1965 struct nfs_removeargs *args = msg->rpc_argp;
1966 struct nfs_removeres *res = msg->rpc_resp;
1968 args->bitmask = server->attr_bitmask;
1969 res->server = server;
1970 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1973 static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1975 struct nfs_removeres *res = task->tk_msg.rpc_resp;
1977 if (nfs4_async_handle_error(task, res->server) == -EAGAIN)
1979 update_changeattr(dir, &res->cinfo);
1980 nfs_post_op_update_inode(dir, &res->dir_attr);
1984 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1985 struct inode *new_dir, struct qstr *new_name)
1987 struct nfs_server *server = NFS_SERVER(old_dir);
1988 struct nfs4_rename_arg arg = {
1989 .old_dir = NFS_FH(old_dir),
1990 .new_dir = NFS_FH(new_dir),
1991 .old_name = old_name,
1992 .new_name = new_name,
1993 .bitmask = server->attr_bitmask,
1995 struct nfs_fattr old_fattr, new_fattr;
1996 struct nfs4_rename_res res = {
1998 .old_fattr = &old_fattr,
1999 .new_fattr = &new_fattr,
2001 struct rpc_message msg = {
2002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2008 nfs_fattr_init(res.old_fattr);
2009 nfs_fattr_init(res.new_fattr);
2010 status = rpc_call_sync(server->client, &msg, 0);
2013 update_changeattr(old_dir, &res.old_cinfo);
2014 nfs_post_op_update_inode(old_dir, res.old_fattr);
2015 update_changeattr(new_dir, &res.new_cinfo);
2016 nfs_post_op_update_inode(new_dir, res.new_fattr);
2021 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2022 struct inode *new_dir, struct qstr *new_name)
2024 struct nfs4_exception exception = { };
2027 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2028 _nfs4_proc_rename(old_dir, old_name,
2031 } while (exception.retry);
2035 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2037 struct nfs_server *server = NFS_SERVER(inode);
2038 struct nfs4_link_arg arg = {
2039 .fh = NFS_FH(inode),
2040 .dir_fh = NFS_FH(dir),
2042 .bitmask = server->attr_bitmask,
2044 struct nfs_fattr fattr, dir_attr;
2045 struct nfs4_link_res res = {
2048 .dir_attr = &dir_attr,
2050 struct rpc_message msg = {
2051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2057 nfs_fattr_init(res.fattr);
2058 nfs_fattr_init(res.dir_attr);
2059 status = rpc_call_sync(server->client, &msg, 0);
2061 update_changeattr(dir, &res.cinfo);
2062 nfs_post_op_update_inode(dir, res.dir_attr);
2063 nfs_post_op_update_inode(inode, res.fattr);
2069 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2071 struct nfs4_exception exception = { };
2074 err = nfs4_handle_exception(NFS_SERVER(inode),
2075 _nfs4_proc_link(inode, dir, name),
2077 } while (exception.retry);
2081 struct nfs4_createdata {
2082 struct rpc_message msg;
2083 struct nfs4_create_arg arg;
2084 struct nfs4_create_res res;
2086 struct nfs_fattr fattr;
2087 struct nfs_fattr dir_fattr;
2090 static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
2091 struct qstr *name, struct iattr *sattr, u32 ftype)
2093 struct nfs4_createdata *data;
2095 data = kzalloc(sizeof(*data), GFP_KERNEL);
2097 struct nfs_server *server = NFS_SERVER(dir);
2099 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
2100 data->msg.rpc_argp = &data->arg;
2101 data->msg.rpc_resp = &data->res;
2102 data->arg.dir_fh = NFS_FH(dir);
2103 data->arg.server = server;
2104 data->arg.name = name;
2105 data->arg.attrs = sattr;
2106 data->arg.ftype = ftype;
2107 data->arg.bitmask = server->attr_bitmask;
2108 data->res.server = server;
2109 data->res.fh = &data->fh;
2110 data->res.fattr = &data->fattr;
2111 data->res.dir_fattr = &data->dir_fattr;
2112 nfs_fattr_init(data->res.fattr);
2113 nfs_fattr_init(data->res.dir_fattr);
2118 static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
2120 int status = rpc_call_sync(NFS_CLIENT(dir), &data->msg, 0);
2122 update_changeattr(dir, &data->res.dir_cinfo);
2123 nfs_post_op_update_inode(dir, data->res.dir_fattr);
2124 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
2129 static void nfs4_free_createdata(struct nfs4_createdata *data)
2134 static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2135 struct page *page, unsigned int len, struct iattr *sattr)
2137 struct nfs4_createdata *data;
2138 int status = -ENAMETOOLONG;
2140 if (len > NFS4_MAXPATHLEN)
2144 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
2148 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
2149 data->arg.u.symlink.pages = &page;
2150 data->arg.u.symlink.len = len;
2152 status = nfs4_do_create(dir, dentry, data);
2154 nfs4_free_createdata(data);
2159 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
2160 struct page *page, unsigned int len, struct iattr *sattr)
2162 struct nfs4_exception exception = { };
2165 err = nfs4_handle_exception(NFS_SERVER(dir),
2166 _nfs4_proc_symlink(dir, dentry, page,
2169 } while (exception.retry);
2173 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2174 struct iattr *sattr)
2176 struct nfs4_createdata *data;
2177 int status = -ENOMEM;
2179 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
2183 status = nfs4_do_create(dir, dentry, data);
2185 nfs4_free_createdata(data);
2190 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2191 struct iattr *sattr)
2193 struct nfs4_exception exception = { };
2196 err = nfs4_handle_exception(NFS_SERVER(dir),
2197 _nfs4_proc_mkdir(dir, dentry, sattr),
2199 } while (exception.retry);
2203 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2204 u64 cookie, struct page *page, unsigned int count, int plus)
2206 struct inode *dir = dentry->d_inode;
2207 struct nfs4_readdir_arg args = {
2212 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2214 struct nfs4_readdir_res res;
2215 struct rpc_message msg = {
2216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2223 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
2224 dentry->d_parent->d_name.name,
2225 dentry->d_name.name,
2226 (unsigned long long)cookie);
2227 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2228 res.pgbase = args.pgbase;
2229 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2231 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2233 nfs_invalidate_atime(dir);
2235 dprintk("%s: returns %d\n", __func__, status);
2239 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2240 u64 cookie, struct page *page, unsigned int count, int plus)
2242 struct nfs4_exception exception = { };
2245 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2246 _nfs4_proc_readdir(dentry, cred, cookie,
2249 } while (exception.retry);
2253 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2254 struct iattr *sattr, dev_t rdev)
2256 struct nfs4_createdata *data;
2257 int mode = sattr->ia_mode;
2258 int status = -ENOMEM;
2260 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2261 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2263 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
2268 data->arg.ftype = NF4FIFO;
2269 else if (S_ISBLK(mode)) {
2270 data->arg.ftype = NF4BLK;
2271 data->arg.u.device.specdata1 = MAJOR(rdev);
2272 data->arg.u.device.specdata2 = MINOR(rdev);
2274 else if (S_ISCHR(mode)) {
2275 data->arg.ftype = NF4CHR;
2276 data->arg.u.device.specdata1 = MAJOR(rdev);
2277 data->arg.u.device.specdata2 = MINOR(rdev);
2280 status = nfs4_do_create(dir, dentry, data);
2282 nfs4_free_createdata(data);
2287 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2288 struct iattr *sattr, dev_t rdev)
2290 struct nfs4_exception exception = { };
2293 err = nfs4_handle_exception(NFS_SERVER(dir),
2294 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2296 } while (exception.retry);
2300 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2301 struct nfs_fsstat *fsstat)
2303 struct nfs4_statfs_arg args = {
2305 .bitmask = server->attr_bitmask,
2307 struct rpc_message msg = {
2308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2313 nfs_fattr_init(fsstat->fattr);
2314 return rpc_call_sync(server->client, &msg, 0);
2317 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2319 struct nfs4_exception exception = { };
2322 err = nfs4_handle_exception(server,
2323 _nfs4_proc_statfs(server, fhandle, fsstat),
2325 } while (exception.retry);
2329 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2330 struct nfs_fsinfo *fsinfo)
2332 struct nfs4_fsinfo_arg args = {
2334 .bitmask = server->attr_bitmask,
2336 struct rpc_message msg = {
2337 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2342 return rpc_call_sync(server->client, &msg, 0);
2345 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2347 struct nfs4_exception exception = { };
2351 err = nfs4_handle_exception(server,
2352 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2354 } while (exception.retry);
2358 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2360 nfs_fattr_init(fsinfo->fattr);
2361 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2364 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2365 struct nfs_pathconf *pathconf)
2367 struct nfs4_pathconf_arg args = {
2369 .bitmask = server->attr_bitmask,
2371 struct rpc_message msg = {
2372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2374 .rpc_resp = pathconf,
2377 /* None of the pathconf attributes are mandatory to implement */
2378 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2379 memset(pathconf, 0, sizeof(*pathconf));
2383 nfs_fattr_init(pathconf->fattr);
2384 return rpc_call_sync(server->client, &msg, 0);
2387 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2388 struct nfs_pathconf *pathconf)
2390 struct nfs4_exception exception = { };
2394 err = nfs4_handle_exception(server,
2395 _nfs4_proc_pathconf(server, fhandle, pathconf),
2397 } while (exception.retry);
2401 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2403 struct nfs_server *server = NFS_SERVER(data->inode);
2405 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
2406 rpc_restart_call(task);
2410 nfs_invalidate_atime(data->inode);
2411 if (task->tk_status > 0)
2412 renew_lease(server, data->timestamp);
2416 static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
2418 data->timestamp = jiffies;
2419 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
2422 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2424 struct inode *inode = data->inode;
2426 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2427 rpc_restart_call(task);
2430 if (task->tk_status >= 0) {
2431 renew_lease(NFS_SERVER(inode), data->timestamp);
2432 nfs_post_op_update_inode_force_wcc(inode, data->res.fattr);
2437 static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
2439 struct nfs_server *server = NFS_SERVER(data->inode);
2441 data->args.bitmask = server->attr_bitmask;
2442 data->res.server = server;
2443 data->timestamp = jiffies;
2445 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
2448 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2450 struct inode *inode = data->inode;
2452 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2453 rpc_restart_call(task);
2456 nfs_refresh_inode(inode, data->res.fattr);
2460 static void nfs4_proc_commit_setup(struct nfs_write_data *data, struct rpc_message *msg)
2462 struct nfs_server *server = NFS_SERVER(data->inode);
2464 data->args.bitmask = server->attr_bitmask;
2465 data->res.server = server;
2466 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
2470 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2471 * standalone procedure for queueing an asynchronous RENEW.
2473 static void nfs4_renew_done(struct rpc_task *task, void *data)
2475 struct nfs_client *clp = (struct nfs_client *)task->tk_msg.rpc_argp;
2476 unsigned long timestamp = (unsigned long)data;
2478 if (task->tk_status < 0) {
2479 switch (task->tk_status) {
2480 case -NFS4ERR_STALE_CLIENTID:
2481 case -NFS4ERR_EXPIRED:
2482 case -NFS4ERR_CB_PATH_DOWN:
2483 nfs4_schedule_state_recovery(clp);
2487 spin_lock(&clp->cl_lock);
2488 if (time_before(clp->cl_last_renewal,timestamp))
2489 clp->cl_last_renewal = timestamp;
2490 spin_unlock(&clp->cl_lock);
2493 static const struct rpc_call_ops nfs4_renew_ops = {
2494 .rpc_call_done = nfs4_renew_done,
2497 int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred)
2499 struct rpc_message msg = {
2500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2505 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2506 &nfs4_renew_ops, (void *)jiffies);
2509 int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
2511 struct rpc_message msg = {
2512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2516 unsigned long now = jiffies;
2519 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2522 spin_lock(&clp->cl_lock);
2523 if (time_before(clp->cl_last_renewal,now))
2524 clp->cl_last_renewal = now;
2525 spin_unlock(&clp->cl_lock);
2529 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2531 return (server->caps & NFS_CAP_ACLS)
2532 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2533 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2536 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2537 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2540 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2542 static void buf_to_pages(const void *buf, size_t buflen,
2543 struct page **pages, unsigned int *pgbase)
2545 const void *p = buf;
2547 *pgbase = offset_in_page(buf);
2549 while (p < buf + buflen) {
2550 *(pages++) = virt_to_page(p);
2551 p += PAGE_CACHE_SIZE;
2555 struct nfs4_cached_acl {
2561 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2563 struct nfs_inode *nfsi = NFS_I(inode);
2565 spin_lock(&inode->i_lock);
2566 kfree(nfsi->nfs4_acl);
2567 nfsi->nfs4_acl = acl;
2568 spin_unlock(&inode->i_lock);
2571 static void nfs4_zap_acl_attr(struct inode *inode)
2573 nfs4_set_cached_acl(inode, NULL);
2576 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2578 struct nfs_inode *nfsi = NFS_I(inode);
2579 struct nfs4_cached_acl *acl;
2582 spin_lock(&inode->i_lock);
2583 acl = nfsi->nfs4_acl;
2586 if (buf == NULL) /* user is just asking for length */
2588 if (acl->cached == 0)
2590 ret = -ERANGE; /* see getxattr(2) man page */
2591 if (acl->len > buflen)
2593 memcpy(buf, acl->data, acl->len);
2597 spin_unlock(&inode->i_lock);
2601 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2603 struct nfs4_cached_acl *acl;
2605 if (buf && acl_len <= PAGE_SIZE) {
2606 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2610 memcpy(acl->data, buf, acl_len);
2612 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2619 nfs4_set_cached_acl(inode, acl);
2622 static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2624 struct page *pages[NFS4ACL_MAXPAGES];
2625 struct nfs_getaclargs args = {
2626 .fh = NFS_FH(inode),
2630 size_t resp_len = buflen;
2632 struct rpc_message msg = {
2633 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2635 .rpc_resp = &resp_len,
2637 struct page *localpage = NULL;
2640 if (buflen < PAGE_SIZE) {
2641 /* As long as we're doing a round trip to the server anyway,
2642 * let's be prepared for a page of acl data. */
2643 localpage = alloc_page(GFP_KERNEL);
2644 resp_buf = page_address(localpage);
2645 if (localpage == NULL)
2647 args.acl_pages[0] = localpage;
2648 args.acl_pgbase = 0;
2649 resp_len = args.acl_len = PAGE_SIZE;
2652 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2654 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2657 if (resp_len > args.acl_len)
2658 nfs4_write_cached_acl(inode, NULL, resp_len);
2660 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2663 if (resp_len > buflen)
2666 memcpy(buf, resp_buf, resp_len);
2671 __free_page(localpage);
2675 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2677 struct nfs4_exception exception = { };
2680 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
2683 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
2684 } while (exception.retry);
2688 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2690 struct nfs_server *server = NFS_SERVER(inode);
2693 if (!nfs4_server_supports_acls(server))
2695 ret = nfs_revalidate_inode(server, inode);
2698 ret = nfs4_read_cached_acl(inode, buf, buflen);
2701 return nfs4_get_acl_uncached(inode, buf, buflen);
2704 static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2706 struct nfs_server *server = NFS_SERVER(inode);
2707 struct page *pages[NFS4ACL_MAXPAGES];
2708 struct nfs_setaclargs arg = {
2709 .fh = NFS_FH(inode),
2713 struct rpc_message msg = {
2714 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2720 if (!nfs4_server_supports_acls(server))
2722 nfs_inode_return_delegation(inode);
2723 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2724 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2725 nfs_zap_caches(inode);
2729 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2731 struct nfs4_exception exception = { };
2734 err = nfs4_handle_exception(NFS_SERVER(inode),
2735 __nfs4_proc_set_acl(inode, buf, buflen),
2737 } while (exception.retry);
2742 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2744 struct nfs_client *clp = server->nfs_client;
2746 if (!clp || task->tk_status >= 0)
2748 switch(task->tk_status) {
2749 case -NFS4ERR_STALE_CLIENTID:
2750 case -NFS4ERR_STALE_STATEID:
2751 case -NFS4ERR_EXPIRED:
2752 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
2753 nfs4_schedule_state_recovery(clp);
2754 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
2755 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
2756 task->tk_status = 0;
2758 case -NFS4ERR_DELAY:
2759 nfs_inc_server_stats((struct nfs_server *) server,
2761 case -NFS4ERR_GRACE:
2762 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2763 task->tk_status = 0;
2765 case -NFS4ERR_OLD_STATEID:
2766 task->tk_status = 0;
2769 task->tk_status = nfs4_map_errors(task->tk_status);
2773 static int nfs4_wait_bit_killable(void *word)
2775 if (fatal_signal_pending(current))
2776 return -ERESTARTSYS;
2781 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs_client *clp)
2787 rwsem_acquire(&clp->cl_sem.dep_map, 0, 0, _RET_IP_);
2789 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2790 nfs4_wait_bit_killable, TASK_KILLABLE);
2792 rwsem_release(&clp->cl_sem.dep_map, 1, _RET_IP_);
2796 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2803 *timeout = NFS4_POLL_RETRY_MIN;
2804 if (*timeout > NFS4_POLL_RETRY_MAX)
2805 *timeout = NFS4_POLL_RETRY_MAX;
2806 schedule_timeout_killable(*timeout);
2807 if (fatal_signal_pending(current))
2813 /* This is the error handling routine for processes that are allowed
2816 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2818 struct nfs_client *clp = server->nfs_client;
2819 int ret = errorcode;
2821 exception->retry = 0;
2825 case -NFS4ERR_STALE_CLIENTID:
2826 case -NFS4ERR_STALE_STATEID:
2827 case -NFS4ERR_EXPIRED:
2828 nfs4_schedule_state_recovery(clp);
2829 ret = nfs4_wait_clnt_recover(server->client, clp);
2831 exception->retry = 1;
2833 case -NFS4ERR_FILE_OPEN:
2834 case -NFS4ERR_GRACE:
2835 case -NFS4ERR_DELAY:
2836 ret = nfs4_delay(server->client, &exception->timeout);
2839 case -NFS4ERR_OLD_STATEID:
2840 exception->retry = 1;
2842 /* We failed to handle the error */
2843 return nfs4_map_errors(ret);
2846 int nfs4_proc_setclientid(struct nfs_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2848 nfs4_verifier sc_verifier;
2849 struct nfs4_setclientid setclientid = {
2850 .sc_verifier = &sc_verifier,
2853 struct rpc_message msg = {
2854 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2855 .rpc_argp = &setclientid,
2863 p = (__be32*)sc_verifier.data;
2864 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2865 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2868 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2869 sizeof(setclientid.sc_name), "%s/%s %s %s %u",
2871 rpc_peeraddr2str(clp->cl_rpcclient,
2873 rpc_peeraddr2str(clp->cl_rpcclient,
2875 clp->cl_rpcclient->cl_auth->au_ops->au_name,
2876 clp->cl_id_uniquifier);
2877 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2878 sizeof(setclientid.sc_netid),
2879 rpc_peeraddr2str(clp->cl_rpcclient,
2880 RPC_DISPLAY_NETID));
2881 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2882 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
2883 clp->cl_ipaddr, port >> 8, port & 255);
2885 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2886 if (status != -NFS4ERR_CLID_INUSE)
2891 ssleep(clp->cl_lease_time + 1);
2893 if (++clp->cl_id_uniquifier == 0)
2899 static int _nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2901 struct nfs_fsinfo fsinfo;
2902 struct rpc_message msg = {
2903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2905 .rpc_resp = &fsinfo,
2912 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2914 spin_lock(&clp->cl_lock);
2915 clp->cl_lease_time = fsinfo.lease_time * HZ;
2916 clp->cl_last_renewal = now;
2917 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
2918 spin_unlock(&clp->cl_lock);
2923 int nfs4_proc_setclientid_confirm(struct nfs_client *clp, struct rpc_cred *cred)
2928 err = _nfs4_proc_setclientid_confirm(clp, cred);
2932 case -NFS4ERR_RESOURCE:
2933 /* The IBM lawyers misread another document! */
2934 case -NFS4ERR_DELAY:
2935 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2941 struct nfs4_delegreturndata {
2942 struct nfs4_delegreturnargs args;
2943 struct nfs4_delegreturnres res;
2945 nfs4_stateid stateid;
2946 unsigned long timestamp;
2947 struct nfs_fattr fattr;
2951 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2953 struct nfs4_delegreturndata *data = calldata;
2954 data->rpc_status = task->tk_status;
2955 if (data->rpc_status == 0)
2956 renew_lease(data->res.server, data->timestamp);
2959 static void nfs4_delegreturn_release(void *calldata)
2964 static const struct rpc_call_ops nfs4_delegreturn_ops = {
2965 .rpc_call_done = nfs4_delegreturn_done,
2966 .rpc_release = nfs4_delegreturn_release,
2969 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
2971 struct nfs4_delegreturndata *data;
2972 struct nfs_server *server = NFS_SERVER(inode);
2973 struct rpc_task *task;
2974 struct rpc_message msg = {
2975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2978 struct rpc_task_setup task_setup_data = {
2979 .rpc_client = server->client,
2980 .rpc_message = &msg,
2981 .callback_ops = &nfs4_delegreturn_ops,
2982 .flags = RPC_TASK_ASYNC,
2986 data = kmalloc(sizeof(*data), GFP_KERNEL);
2989 data->args.fhandle = &data->fh;
2990 data->args.stateid = &data->stateid;
2991 data->args.bitmask = server->attr_bitmask;
2992 nfs_copy_fh(&data->fh, NFS_FH(inode));
2993 memcpy(&data->stateid, stateid, sizeof(data->stateid));
2994 data->res.fattr = &data->fattr;
2995 data->res.server = server;
2996 nfs_fattr_init(data->res.fattr);
2997 data->timestamp = jiffies;
2998 data->rpc_status = 0;
3000 task_setup_data.callback_data = data;
3001 msg.rpc_argp = &data->args,
3002 msg.rpc_resp = &data->res,
3003 task = rpc_run_task(&task_setup_data);
3005 return PTR_ERR(task);
3008 status = nfs4_wait_for_completion_rpc_task(task);
3011 status = data->rpc_status;
3014 nfs_refresh_inode(inode, &data->fattr);
3020 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
3022 struct nfs_server *server = NFS_SERVER(inode);
3023 struct nfs4_exception exception = { };
3026 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
3028 case -NFS4ERR_STALE_STATEID:
3029 case -NFS4ERR_EXPIRED:
3033 err = nfs4_handle_exception(server, err, &exception);
3034 } while (exception.retry);
3038 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3039 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3042 * sleep, with exponential backoff, and retry the LOCK operation.
3044 static unsigned long
3045 nfs4_set_lock_task_retry(unsigned long timeout)
3047 schedule_timeout_killable(timeout);
3049 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3050 return NFS4_LOCK_MAXTIMEOUT;
3054 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3056 struct inode *inode = state->inode;
3057 struct nfs_server *server = NFS_SERVER(inode);
3058 struct nfs_client *clp = server->nfs_client;
3059 struct nfs_lockt_args arg = {
3060 .fh = NFS_FH(inode),
3063 struct nfs_lockt_res res = {
3066 struct rpc_message msg = {
3067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3070 .rpc_cred = state->owner->so_cred,
3072 struct nfs4_lock_state *lsp;
3075 down_read(&clp->cl_sem);
3076 arg.lock_owner.clientid = clp->cl_clientid;
3077 status = nfs4_set_lock_state(state, request);
3080 lsp = request->fl_u.nfs4_fl.owner;
3081 arg.lock_owner.id = lsp->ls_id.id;
3082 status = rpc_call_sync(server->client, &msg, 0);
3085 request->fl_type = F_UNLCK;
3087 case -NFS4ERR_DENIED:
3090 request->fl_ops->fl_release_private(request);
3092 up_read(&clp->cl_sem);
3096 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3098 struct nfs4_exception exception = { };
3102 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3103 _nfs4_proc_getlk(state, cmd, request),
3105 } while (exception.retry);
3109 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3112 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3114 res = posix_lock_file_wait(file, fl);
3117 res = flock_lock_file_wait(file, fl);
3125 struct nfs4_unlockdata {
3126 struct nfs_locku_args arg;
3127 struct nfs_locku_res res;
3128 struct nfs4_lock_state *lsp;
3129 struct nfs_open_context *ctx;
3130 struct file_lock fl;
3131 const struct nfs_server *server;
3132 unsigned long timestamp;
3135 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3136 struct nfs_open_context *ctx,
3137 struct nfs4_lock_state *lsp,
3138 struct nfs_seqid *seqid)
3140 struct nfs4_unlockdata *p;
3141 struct inode *inode = lsp->ls_state->inode;
3143 p = kmalloc(sizeof(*p), GFP_KERNEL);
3146 p->arg.fh = NFS_FH(inode);
3148 p->arg.seqid = seqid;
3149 p->res.seqid = seqid;
3150 p->arg.stateid = &lsp->ls_stateid;
3152 atomic_inc(&lsp->ls_count);
3153 /* Ensure we don't close file until we're done freeing locks! */
3154 p->ctx = get_nfs_open_context(ctx);
3155 memcpy(&p->fl, fl, sizeof(p->fl));
3156 p->server = NFS_SERVER(inode);
3160 static void nfs4_locku_release_calldata(void *data)
3162 struct nfs4_unlockdata *calldata = data;
3163 nfs_free_seqid(calldata->arg.seqid);
3164 nfs4_put_lock_state(calldata->lsp);
3165 put_nfs_open_context(calldata->ctx);
3169 static void nfs4_locku_done(struct rpc_task *task, void *data)
3171 struct nfs4_unlockdata *calldata = data;
3173 if (RPC_ASSASSINATED(task))
3175 switch (task->tk_status) {
3177 memcpy(calldata->lsp->ls_stateid.data,
3178 calldata->res.stateid.data,
3179 sizeof(calldata->lsp->ls_stateid.data));
3180 renew_lease(calldata->server, calldata->timestamp);
3182 case -NFS4ERR_STALE_STATEID:
3183 case -NFS4ERR_EXPIRED:
3186 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN)
3187 rpc_restart_call(task);
3191 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3193 struct nfs4_unlockdata *calldata = data;
3195 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3197 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3198 /* Note: exit _without_ running nfs4_locku_done */
3199 task->tk_action = NULL;
3202 calldata->timestamp = jiffies;
3203 rpc_call_start(task);
3206 static const struct rpc_call_ops nfs4_locku_ops = {
3207 .rpc_call_prepare = nfs4_locku_prepare,
3208 .rpc_call_done = nfs4_locku_done,
3209 .rpc_release = nfs4_locku_release_calldata,
3212 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3213 struct nfs_open_context *ctx,
3214 struct nfs4_lock_state *lsp,
3215 struct nfs_seqid *seqid)
3217 struct nfs4_unlockdata *data;
3218 struct rpc_message msg = {
3219 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3220 .rpc_cred = ctx->cred,
3222 struct rpc_task_setup task_setup_data = {
3223 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
3224 .rpc_message = &msg,
3225 .callback_ops = &nfs4_locku_ops,
3226 .workqueue = nfsiod_workqueue,
3227 .flags = RPC_TASK_ASYNC,
3230 /* Ensure this is an unlock - when canceling a lock, the
3231 * canceled lock is passed in, and it won't be an unlock.
3233 fl->fl_type = F_UNLCK;
3235 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3237 nfs_free_seqid(seqid);
3238 return ERR_PTR(-ENOMEM);
3241 msg.rpc_argp = &data->arg,
3242 msg.rpc_resp = &data->res,
3243 task_setup_data.callback_data = data;
3244 return rpc_run_task(&task_setup_data);
3247 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3249 struct nfs_seqid *seqid;
3250 struct nfs4_lock_state *lsp;
3251 struct rpc_task *task;
3253 unsigned char fl_flags = request->fl_flags;
3255 status = nfs4_set_lock_state(state, request);
3256 /* Unlock _before_ we do the RPC call */
3257 request->fl_flags |= FL_EXISTS;
3258 if (do_vfs_lock(request->fl_file, request) == -ENOENT)
3262 /* Is this a delegated lock? */
3263 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3265 lsp = request->fl_u.nfs4_fl.owner;
3266 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3270 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
3271 status = PTR_ERR(task);
3274 status = nfs4_wait_for_completion_rpc_task(task);
3277 request->fl_flags = fl_flags;
3281 struct nfs4_lockdata {
3282 struct nfs_lock_args arg;
3283 struct nfs_lock_res res;
3284 struct nfs4_lock_state *lsp;
3285 struct nfs_open_context *ctx;
3286 struct file_lock fl;
3287 unsigned long timestamp;
3292 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3293 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3295 struct nfs4_lockdata *p;
3296 struct inode *inode = lsp->ls_state->inode;
3297 struct nfs_server *server = NFS_SERVER(inode);
3299 p = kzalloc(sizeof(*p), GFP_KERNEL);
3303 p->arg.fh = NFS_FH(inode);
3305 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid);
3306 if (p->arg.open_seqid == NULL)
3308 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3309 if (p->arg.lock_seqid == NULL)
3310 goto out_free_seqid;
3311 p->arg.lock_stateid = &lsp->ls_stateid;
3312 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
3313 p->arg.lock_owner.id = lsp->ls_id.id;
3314 p->res.lock_seqid = p->arg.lock_seqid;
3316 atomic_inc(&lsp->ls_count);
3317 p->ctx = get_nfs_open_context(ctx);
3318 memcpy(&p->fl, fl, sizeof(p->fl));
3321 nfs_free_seqid(p->arg.open_seqid);
3327 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3329 struct nfs4_lockdata *data = calldata;
3330 struct nfs4_state *state = data->lsp->ls_state;
3332 dprintk("%s: begin!\n", __func__);
3333 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3335 /* Do we need to do an open_to_lock_owner? */
3336 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3337 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
3339 data->arg.open_stateid = &state->stateid;
3340 data->arg.new_lock_owner = 1;
3341 data->res.open_seqid = data->arg.open_seqid;
3343 data->arg.new_lock_owner = 0;
3344 data->timestamp = jiffies;
3345 rpc_call_start(task);
3346 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
3349 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3351 struct nfs4_lockdata *data = calldata;
3353 dprintk("%s: begin!\n", __func__);
3355 data->rpc_status = task->tk_status;
3356 if (RPC_ASSASSINATED(task))
3358 if (data->arg.new_lock_owner != 0) {
3359 if (data->rpc_status == 0)
3360 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3364 if (data->rpc_status == 0) {
3365 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3366 sizeof(data->lsp->ls_stateid.data));
3367 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3368 renew_lease(NFS_SERVER(data->ctx->path.dentry->d_inode), data->timestamp);
3371 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
3374 static void nfs4_lock_release(void *calldata)
3376 struct nfs4_lockdata *data = calldata;
3378 dprintk("%s: begin!\n", __func__);
3379 nfs_free_seqid(data->arg.open_seqid);
3380 if (data->cancelled != 0) {
3381 struct rpc_task *task;
3382 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3383 data->arg.lock_seqid);
3386 dprintk("%s: cancelling lock!\n", __func__);
3388 nfs_free_seqid(data->arg.lock_seqid);
3389 nfs4_put_lock_state(data->lsp);
3390 put_nfs_open_context(data->ctx);
3392 dprintk("%s: done!\n", __func__);
3395 static const struct rpc_call_ops nfs4_lock_ops = {
3396 .rpc_call_prepare = nfs4_lock_prepare,
3397 .rpc_call_done = nfs4_lock_done,
3398 .rpc_release = nfs4_lock_release,
3401 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3403 struct nfs4_lockdata *data;
3404 struct rpc_task *task;
3405 struct rpc_message msg = {
3406 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3407 .rpc_cred = state->owner->so_cred,
3409 struct rpc_task_setup task_setup_data = {
3410 .rpc_client = NFS_CLIENT(state->inode),
3411 .rpc_message = &msg,
3412 .callback_ops = &nfs4_lock_ops,
3413 .workqueue = nfsiod_workqueue,
3414 .flags = RPC_TASK_ASYNC,
3418 dprintk("%s: begin!\n", __func__);
3419 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
3420 fl->fl_u.nfs4_fl.owner);
3424 data->arg.block = 1;
3426 data->arg.reclaim = 1;
3427 msg.rpc_argp = &data->arg,
3428 msg.rpc_resp = &data->res,
3429 task_setup_data.callback_data = data;
3430 task = rpc_run_task(&task_setup_data);
3432 return PTR_ERR(task);
3433 ret = nfs4_wait_for_completion_rpc_task(task);
3435 ret = data->rpc_status;
3436 if (ret == -NFS4ERR_DENIED)
3439 data->cancelled = 1;
3441 dprintk("%s: done, ret = %d!\n", __func__, ret);
3445 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3447 struct nfs_server *server = NFS_SERVER(state->inode);
3448 struct nfs4_exception exception = { };
3452 /* Cache the lock if possible... */
3453 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3455 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3456 if (err != -NFS4ERR_DELAY)
3458 nfs4_handle_exception(server, err, &exception);
3459 } while (exception.retry);
3463 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3465 struct nfs_server *server = NFS_SERVER(state->inode);
3466 struct nfs4_exception exception = { };
3469 err = nfs4_set_lock_state(state, request);
3473 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
3475 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3476 if (err != -NFS4ERR_DELAY)
3478 nfs4_handle_exception(server, err, &exception);
3479 } while (exception.retry);
3483 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3485 struct nfs_client *clp = state->owner->so_client;
3486 unsigned char fl_flags = request->fl_flags;
3489 /* Is this a delegated open? */
3490 status = nfs4_set_lock_state(state, request);
3493 request->fl_flags |= FL_ACCESS;
3494 status = do_vfs_lock(request->fl_file, request);
3497 down_read(&clp->cl_sem);
3498 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3499 struct nfs_inode *nfsi = NFS_I(state->inode);
3500 /* Yes: cache locks! */
3501 down_read(&nfsi->rwsem);
3502 /* ...but avoid races with delegation recall... */
3503 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
3504 request->fl_flags = fl_flags & ~FL_SLEEP;
3505 status = do_vfs_lock(request->fl_file, request);
3506 up_read(&nfsi->rwsem);
3509 up_read(&nfsi->rwsem);
3511 status = _nfs4_do_setlk(state, cmd, request, 0);
3514 /* Note: we always want to sleep here! */
3515 request->fl_flags = fl_flags | FL_SLEEP;
3516 if (do_vfs_lock(request->fl_file, request) < 0)
3517 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __func__);
3519 up_read(&clp->cl_sem);
3521 request->fl_flags = fl_flags;
3525 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3527 struct nfs4_exception exception = { };
3531 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3532 _nfs4_proc_setlk(state, cmd, request),
3534 } while (exception.retry);
3539 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3541 struct nfs_open_context *ctx;
3542 struct nfs4_state *state;
3543 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3546 /* verify open state */
3547 ctx = nfs_file_open_context(filp);
3550 if (request->fl_start < 0 || request->fl_end < 0)
3554 return nfs4_proc_getlk(state, F_GETLK, request);
3556 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3559 if (request->fl_type == F_UNLCK)
3560 return nfs4_proc_unlck(state, cmd, request);
3563 status = nfs4_proc_setlk(state, cmd, request);
3564 if ((status != -EAGAIN) || IS_SETLK(cmd))
3566 timeout = nfs4_set_lock_task_retry(timeout);
3567 status = -ERESTARTSYS;
3570 } while(status < 0);
3574 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3576 struct nfs_server *server = NFS_SERVER(state->inode);
3577 struct nfs4_exception exception = { };
3580 err = nfs4_set_lock_state(state, fl);
3584 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3585 if (err != -NFS4ERR_DELAY)
3587 err = nfs4_handle_exception(server, err, &exception);
3588 } while (exception.retry);
3593 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3595 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3596 size_t buflen, int flags)
3598 struct inode *inode = dentry->d_inode;
3600 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3603 return nfs4_proc_set_acl(inode, buf, buflen);
3606 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3607 * and that's what we'll do for e.g. user attributes that haven't been set.
3608 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3609 * attributes in kernel-managed attribute namespaces. */
3610 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3613 struct inode *inode = dentry->d_inode;
3615 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3618 return nfs4_proc_get_acl(inode, buf, buflen);
3621 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3623 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3625 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3627 if (buf && buflen < len)
3630 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3634 int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
3635 struct nfs4_fs_locations *fs_locations, struct page *page)
3637 struct nfs_server *server = NFS_SERVER(dir);
3639 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3640 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3642 struct nfs4_fs_locations_arg args = {
3643 .dir_fh = NFS_FH(dir),
3648 struct rpc_message msg = {
3649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3651 .rpc_resp = fs_locations,
3655 dprintk("%s: start\n", __func__);
3656 nfs_fattr_init(&fs_locations->fattr);
3657 fs_locations->server = server;
3658 fs_locations->nlocations = 0;
3659 status = rpc_call_sync(server->client, &msg, 0);
3660 dprintk("%s: returned status = %d\n", __func__, status);
3664 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3665 .recover_open = nfs4_open_reclaim,
3666 .recover_lock = nfs4_lock_reclaim,
3669 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3670 .recover_open = nfs4_open_expired,
3671 .recover_lock = nfs4_lock_expired,
3674 static const struct inode_operations nfs4_file_inode_operations = {
3675 .permission = nfs_permission,
3676 .getattr = nfs_getattr,
3677 .setattr = nfs_setattr,
3678 .getxattr = nfs4_getxattr,
3679 .setxattr = nfs4_setxattr,
3680 .listxattr = nfs4_listxattr,
3683 const struct nfs_rpc_ops nfs_v4_clientops = {
3684 .version = 4, /* protocol version */
3685 .dentry_ops = &nfs4_dentry_operations,
3686 .dir_inode_ops = &nfs4_dir_inode_operations,
3687 .file_inode_ops = &nfs4_file_inode_operations,
3688 .getroot = nfs4_proc_get_root,
3689 .getattr = nfs4_proc_getattr,
3690 .setattr = nfs4_proc_setattr,
3691 .lookupfh = nfs4_proc_lookupfh,
3692 .lookup = nfs4_proc_lookup,
3693 .access = nfs4_proc_access,
3694 .readlink = nfs4_proc_readlink,
3695 .create = nfs4_proc_create,
3696 .remove = nfs4_proc_remove,
3697 .unlink_setup = nfs4_proc_unlink_setup,
3698 .unlink_done = nfs4_proc_unlink_done,
3699 .rename = nfs4_proc_rename,
3700 .link = nfs4_proc_link,
3701 .symlink = nfs4_proc_symlink,
3702 .mkdir = nfs4_proc_mkdir,
3703 .rmdir = nfs4_proc_remove,
3704 .readdir = nfs4_proc_readdir,
3705 .mknod = nfs4_proc_mknod,
3706 .statfs = nfs4_proc_statfs,
3707 .fsinfo = nfs4_proc_fsinfo,
3708 .pathconf = nfs4_proc_pathconf,
3709 .set_capabilities = nfs4_server_capabilities,
3710 .decode_dirent = nfs4_decode_dirent,
3711 .read_setup = nfs4_proc_read_setup,
3712 .read_done = nfs4_read_done,
3713 .write_setup = nfs4_proc_write_setup,
3714 .write_done = nfs4_write_done,
3715 .commit_setup = nfs4_proc_commit_setup,
3716 .commit_done = nfs4_commit_done,
3717 .lock = nfs4_proc_lock,
3718 .clear_acl_cache = nfs4_zap_acl_attr,