4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
53 #include "delegation.h"
56 #define NFSDBG_FACILITY NFSDBG_PROC
58 #define NFS4_POLL_RETRY_MIN (1*HZ)
59 #define NFS4_POLL_RETRY_MAX (15*HZ)
62 static int _nfs4_proc_open(struct nfs4_opendata *data);
63 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
64 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
65 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
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 nfs4_client *clp);
68 extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
69 extern struct rpc_procinfo nfs4_procedures[];
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, u32 *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 = (u32 *)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, dentry->d_inode->i_ino);
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, dentry->d_parent->d_inode->i_ino);
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 nfs4_client *clp = server->nfs4_state;
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->before == nfsi->change_attr && cinfo->atomic)
214 nfsi->change_attr = cinfo->after;
215 spin_unlock(&dir->i_lock);
218 struct nfs4_opendata {
220 struct nfs_openargs o_arg;
221 struct nfs_openres o_res;
222 struct nfs_open_confirmargs c_arg;
223 struct nfs_open_confirmres c_res;
224 struct nfs_fattr f_attr;
225 struct nfs_fattr dir_attr;
226 struct dentry *dentry;
228 struct nfs4_state_owner *owner;
230 unsigned long timestamp;
235 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
236 struct nfs4_state_owner *sp, int flags,
237 const struct iattr *attrs)
239 struct dentry *parent = dget_parent(dentry);
240 struct inode *dir = parent->d_inode;
241 struct nfs_server *server = NFS_SERVER(dir);
242 struct nfs4_opendata *p;
244 p = kzalloc(sizeof(*p), GFP_KERNEL);
247 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
248 if (p->o_arg.seqid == NULL)
250 atomic_set(&p->count, 1);
251 p->dentry = dget(dentry);
254 atomic_inc(&sp->so_count);
255 p->o_arg.fh = NFS_FH(dir);
256 p->o_arg.open_flags = flags,
257 p->o_arg.clientid = server->nfs4_state->cl_clientid;
258 p->o_arg.id = sp->so_id;
259 p->o_arg.name = &dentry->d_name;
260 p->o_arg.server = server;
261 p->o_arg.bitmask = server->attr_bitmask;
262 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
263 p->o_res.f_attr = &p->f_attr;
264 p->o_res.dir_attr = &p->dir_attr;
265 p->o_res.server = server;
266 nfs_fattr_init(&p->f_attr);
267 nfs_fattr_init(&p->dir_attr);
268 if (flags & O_EXCL) {
269 u32 *s = (u32 *) p->o_arg.u.verifier.data;
272 } else if (flags & O_CREAT) {
273 p->o_arg.u.attrs = &p->attrs;
274 memcpy(&p->attrs, attrs, sizeof(p->attrs));
276 p->c_arg.fh = &p->o_res.fh;
277 p->c_arg.stateid = &p->o_res.stateid;
278 p->c_arg.seqid = p->o_arg.seqid;
287 static void nfs4_opendata_free(struct nfs4_opendata *p)
289 if (p != NULL && atomic_dec_and_test(&p->count)) {
290 nfs_free_seqid(p->o_arg.seqid);
291 nfs4_put_state_owner(p->owner);
298 /* Helper for asynchronous RPC calls */
299 static int nfs4_call_async(struct rpc_clnt *clnt,
300 const struct rpc_call_ops *tk_ops, void *calldata)
302 struct rpc_task *task;
304 if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
310 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
315 rpc_clnt_sigmask(task->tk_client, &oldset);
316 ret = rpc_wait_for_completion_task(task);
317 rpc_clnt_sigunmask(task->tk_client, &oldset);
321 static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
323 switch (open_flags) {
330 case FMODE_READ|FMODE_WRITE:
335 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
337 struct inode *inode = state->inode;
339 open_flags &= (FMODE_READ|FMODE_WRITE);
340 /* Protect against nfs4_find_state_byowner() */
341 spin_lock(&state->owner->so_lock);
342 spin_lock(&inode->i_lock);
343 memcpy(&state->stateid, stateid, sizeof(state->stateid));
344 update_open_stateflags(state, open_flags);
345 nfs4_state_set_mode_locked(state, state->state | open_flags);
346 spin_unlock(&inode->i_lock);
347 spin_unlock(&state->owner->so_lock);
350 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
353 struct nfs4_state *state = NULL;
355 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
357 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
360 state = nfs4_get_open_state(inode, data->owner);
363 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
370 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
372 struct nfs_inode *nfsi = NFS_I(state->inode);
373 struct nfs_open_context *ctx;
375 spin_lock(&state->inode->i_lock);
376 list_for_each_entry(ctx, &nfsi->open_files, list) {
377 if (ctx->state != state)
379 get_nfs_open_context(ctx);
380 spin_unlock(&state->inode->i_lock);
383 spin_unlock(&state->inode->i_lock);
384 return ERR_PTR(-ENOENT);
387 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
391 opendata->o_arg.open_flags = openflags;
392 ret = _nfs4_proc_open(opendata);
395 memcpy(stateid->data, opendata->o_res.stateid.data,
396 sizeof(stateid->data));
400 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
402 nfs4_stateid stateid;
403 struct nfs4_state *newstate;
408 /* memory barrier prior to reading state->n_* */
410 if (state->n_rdwr != 0) {
411 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
414 mode |= FMODE_READ|FMODE_WRITE;
415 if (opendata->o_res.delegation_type != 0)
416 delegation = opendata->o_res.delegation_type;
419 if (state->n_wronly != 0) {
420 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
424 if (opendata->o_res.delegation_type != 0)
425 delegation = opendata->o_res.delegation_type;
428 if (state->n_rdonly != 0) {
429 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
434 clear_bit(NFS_DELEGATED_STATE, &state->flags);
437 if (opendata->o_res.delegation_type == 0)
438 opendata->o_res.delegation_type = delegation;
439 opendata->o_arg.open_flags |= mode;
440 newstate = nfs4_opendata_to_nfs4_state(opendata);
441 if (newstate != NULL) {
442 if (opendata->o_res.delegation_type != 0) {
443 struct nfs_inode *nfsi = NFS_I(newstate->inode);
444 int delegation_flags = 0;
445 if (nfsi->delegation)
446 delegation_flags = nfsi->delegation->flags;
447 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
448 nfs_inode_set_delegation(newstate->inode,
449 opendata->owner->so_cred,
452 nfs_inode_reclaim_delegation(newstate->inode,
453 opendata->owner->so_cred,
456 nfs4_close_state(newstate, opendata->o_arg.open_flags);
458 if (newstate != state)
465 * reclaim state on the server after a reboot.
467 static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
469 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
470 struct nfs4_opendata *opendata;
471 int delegation_type = 0;
474 if (delegation != NULL) {
475 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
476 memcpy(&state->stateid, &delegation->stateid,
477 sizeof(state->stateid));
478 set_bit(NFS_DELEGATED_STATE, &state->flags);
481 delegation_type = delegation->type;
483 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
484 if (opendata == NULL)
486 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
487 opendata->o_arg.fh = NFS_FH(state->inode);
488 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
489 opendata->o_arg.u.delegation_type = delegation_type;
490 status = nfs4_open_recover(opendata, state);
491 nfs4_opendata_free(opendata);
495 static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
497 struct nfs_server *server = NFS_SERVER(state->inode);
498 struct nfs4_exception exception = { };
501 err = _nfs4_do_open_reclaim(sp, state, dentry);
502 if (err != -NFS4ERR_DELAY)
504 nfs4_handle_exception(server, err, &exception);
505 } while (exception.retry);
509 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
511 struct nfs_open_context *ctx;
514 ctx = nfs4_state_find_open_context(state);
517 ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
518 put_nfs_open_context(ctx);
522 static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
524 struct nfs4_state_owner *sp = state->owner;
525 struct nfs4_opendata *opendata;
528 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
530 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
531 if (opendata == NULL)
533 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
534 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
535 sizeof(opendata->o_arg.u.delegation.data));
536 ret = nfs4_open_recover(opendata, state);
537 nfs4_opendata_free(opendata);
541 int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
543 struct nfs4_exception exception = { };
544 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
547 err = _nfs4_open_delegation_recall(dentry, state);
551 case -NFS4ERR_STALE_CLIENTID:
552 case -NFS4ERR_STALE_STATEID:
553 case -NFS4ERR_EXPIRED:
554 /* Don't recall a delegation if it was lost */
555 nfs4_schedule_state_recovery(server->nfs4_state);
558 err = nfs4_handle_exception(server, err, &exception);
559 } while (exception.retry);
563 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
565 struct nfs4_opendata *data = calldata;
566 struct rpc_message msg = {
567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
568 .rpc_argp = &data->c_arg,
569 .rpc_resp = &data->c_res,
570 .rpc_cred = data->owner->so_cred,
572 data->timestamp = jiffies;
573 rpc_call_setup(task, &msg, 0);
576 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
578 struct nfs4_opendata *data = calldata;
580 data->rpc_status = task->tk_status;
581 if (RPC_ASSASSINATED(task))
583 if (data->rpc_status == 0) {
584 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
585 sizeof(data->o_res.stateid.data));
586 renew_lease(data->o_res.server, data->timestamp);
588 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
589 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
592 static void nfs4_open_confirm_release(void *calldata)
594 struct nfs4_opendata *data = calldata;
595 struct nfs4_state *state = NULL;
597 /* If this request hasn't been cancelled, do nothing */
598 if (data->cancelled == 0)
600 /* In case of error, no cleanup! */
601 if (data->rpc_status != 0)
603 nfs_confirm_seqid(&data->owner->so_seqid, 0);
604 state = nfs4_opendata_to_nfs4_state(data);
606 nfs4_close_state(state, data->o_arg.open_flags);
608 nfs4_opendata_free(data);
611 static const struct rpc_call_ops nfs4_open_confirm_ops = {
612 .rpc_call_prepare = nfs4_open_confirm_prepare,
613 .rpc_call_done = nfs4_open_confirm_done,
614 .rpc_release = nfs4_open_confirm_release,
618 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
620 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
622 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
623 struct rpc_task *task;
626 atomic_inc(&data->count);
628 * If rpc_run_task() ends up calling ->rpc_release(), we
629 * want to ensure that it takes the 'error' code path.
631 data->rpc_status = -ENOMEM;
632 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
634 return PTR_ERR(task);
635 status = nfs4_wait_for_completion_rpc_task(task);
640 status = data->rpc_status;
641 rpc_release_task(task);
645 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
647 struct nfs4_opendata *data = calldata;
648 struct nfs4_state_owner *sp = data->owner;
649 struct rpc_message msg = {
650 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
651 .rpc_argp = &data->o_arg,
652 .rpc_resp = &data->o_res,
653 .rpc_cred = sp->so_cred,
656 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
658 /* Update sequence id. */
659 data->o_arg.id = sp->so_id;
660 data->o_arg.clientid = sp->so_client->cl_clientid;
661 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
662 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
663 data->timestamp = jiffies;
664 rpc_call_setup(task, &msg, 0);
667 static void nfs4_open_done(struct rpc_task *task, void *calldata)
669 struct nfs4_opendata *data = calldata;
671 data->rpc_status = task->tk_status;
672 if (RPC_ASSASSINATED(task))
674 if (task->tk_status == 0) {
675 switch (data->o_res.f_attr->mode & S_IFMT) {
679 data->rpc_status = -ELOOP;
682 data->rpc_status = -EISDIR;
685 data->rpc_status = -ENOTDIR;
687 renew_lease(data->o_res.server, data->timestamp);
689 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
692 static void nfs4_open_release(void *calldata)
694 struct nfs4_opendata *data = calldata;
695 struct nfs4_state *state = NULL;
697 /* If this request hasn't been cancelled, do nothing */
698 if (data->cancelled == 0)
700 /* In case of error, no cleanup! */
701 if (data->rpc_status != 0)
703 /* In case we need an open_confirm, no cleanup! */
704 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
706 nfs_confirm_seqid(&data->owner->so_seqid, 0);
707 state = nfs4_opendata_to_nfs4_state(data);
709 nfs4_close_state(state, data->o_arg.open_flags);
711 nfs4_opendata_free(data);
714 static const struct rpc_call_ops nfs4_open_ops = {
715 .rpc_call_prepare = nfs4_open_prepare,
716 .rpc_call_done = nfs4_open_done,
717 .rpc_release = nfs4_open_release,
721 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
723 static int _nfs4_proc_open(struct nfs4_opendata *data)
725 struct inode *dir = data->dir->d_inode;
726 struct nfs_server *server = NFS_SERVER(dir);
727 struct nfs_openargs *o_arg = &data->o_arg;
728 struct nfs_openres *o_res = &data->o_res;
729 struct rpc_task *task;
732 atomic_inc(&data->count);
734 * If rpc_run_task() ends up calling ->rpc_release(), we
735 * want to ensure that it takes the 'error' code path.
737 data->rpc_status = -ENOMEM;
738 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
740 return PTR_ERR(task);
741 status = nfs4_wait_for_completion_rpc_task(task);
746 status = data->rpc_status;
747 rpc_release_task(task);
751 if (o_arg->open_flags & O_CREAT) {
752 update_changeattr(dir, &o_res->cinfo);
753 nfs_post_op_update_inode(dir, o_res->dir_attr);
755 nfs_refresh_inode(dir, o_res->dir_attr);
756 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
757 status = _nfs4_proc_open_confirm(data);
761 nfs_confirm_seqid(&data->owner->so_seqid, 0);
762 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
763 return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
767 static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
769 struct nfs_access_entry cache;
773 if (openflags & FMODE_READ)
775 if (openflags & FMODE_WRITE)
777 status = nfs_access_get_cached(inode, cred, &cache);
781 /* Be clever: ask server to check for all possible rights */
782 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
784 cache.jiffies = jiffies;
785 status = _nfs4_proc_access(inode, &cache);
788 nfs_access_add_cache(inode, &cache);
790 if ((cache.mask & mask) == mask)
795 int nfs4_recover_expired_lease(struct nfs_server *server)
797 struct nfs4_client *clp = server->nfs4_state;
799 if (test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state))
800 nfs4_schedule_state_recovery(clp);
801 return nfs4_wait_clnt_recover(server->client, clp);
806 * reclaim state on the server after a network partition.
807 * Assumes caller holds the appropriate lock
809 static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
811 struct inode *inode = state->inode;
812 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
813 struct nfs4_opendata *opendata;
814 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
817 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
818 ret = _nfs4_do_access(inode, sp->so_cred, openflags);
821 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
822 set_bit(NFS_DELEGATED_STATE, &state->flags);
825 opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
826 if (opendata == NULL)
828 ret = nfs4_open_recover(opendata, state);
829 if (ret == -ESTALE) {
830 /* Invalidate the state owner so we don't ever use it again */
831 nfs4_drop_state_owner(sp);
834 nfs4_opendata_free(opendata);
838 static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
840 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
841 struct nfs4_exception exception = { };
845 err = _nfs4_open_expired(sp, state, dentry);
846 if (err == -NFS4ERR_DELAY)
847 nfs4_handle_exception(server, err, &exception);
848 } while (exception.retry);
852 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
854 struct nfs_open_context *ctx;
857 ctx = nfs4_state_find_open_context(state);
860 ret = nfs4_do_open_expired(sp, state, ctx->dentry);
861 put_nfs_open_context(ctx);
866 * Returns a referenced nfs4_state if there is an open delegation on the file
868 static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
870 struct nfs_delegation *delegation;
871 struct nfs_server *server = NFS_SERVER(inode);
872 struct nfs4_client *clp = server->nfs4_state;
873 struct nfs_inode *nfsi = NFS_I(inode);
874 struct nfs4_state_owner *sp = NULL;
875 struct nfs4_state *state = NULL;
876 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
880 if (!(sp = nfs4_get_state_owner(server, cred))) {
881 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
884 err = nfs4_recover_expired_lease(server);
886 goto out_put_state_owner;
887 /* Protect against reboot recovery - NOTE ORDER! */
888 down_read(&clp->cl_sem);
889 /* Protect against delegation recall */
890 down_read(&nfsi->rwsem);
891 delegation = NFS_I(inode)->delegation;
893 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
896 state = nfs4_get_open_state(inode, sp);
901 if ((state->state & open_flags) == open_flags) {
902 spin_lock(&inode->i_lock);
903 update_open_stateflags(state, open_flags);
904 spin_unlock(&inode->i_lock);
906 } else if (state->state != 0)
907 goto out_put_open_state;
910 err = _nfs4_do_access(inode, cred, open_flags);
913 goto out_put_open_state;
914 set_bit(NFS_DELEGATED_STATE, &state->flags);
915 update_open_stateid(state, &delegation->stateid, open_flags);
917 nfs4_put_state_owner(sp);
918 up_read(&nfsi->rwsem);
919 up_read(&clp->cl_sem);
923 nfs4_put_open_state(state);
925 up_read(&nfsi->rwsem);
926 up_read(&clp->cl_sem);
928 nfs_inode_return_delegation(inode);
930 nfs4_put_state_owner(sp);
934 static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
936 struct nfs4_exception exception = { };
937 struct nfs4_state *res = ERR_PTR(-EIO);
941 err = _nfs4_open_delegated(inode, flags, cred, &res);
944 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
946 } while (exception.retry);
951 * Returns a referenced nfs4_state
953 static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
955 struct nfs4_state_owner *sp;
956 struct nfs4_state *state = NULL;
957 struct nfs_server *server = NFS_SERVER(dir);
958 struct nfs4_client *clp = server->nfs4_state;
959 struct nfs4_opendata *opendata;
962 /* Protect against reboot recovery conflicts */
964 if (!(sp = nfs4_get_state_owner(server, cred))) {
965 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
968 status = nfs4_recover_expired_lease(server);
970 goto err_put_state_owner;
971 down_read(&clp->cl_sem);
973 opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
974 if (opendata == NULL)
975 goto err_put_state_owner;
977 status = _nfs4_proc_open(opendata);
979 goto err_opendata_free;
982 state = nfs4_opendata_to_nfs4_state(opendata);
984 goto err_opendata_free;
985 if (opendata->o_res.delegation_type != 0)
986 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
987 nfs4_opendata_free(opendata);
988 nfs4_put_state_owner(sp);
989 up_read(&clp->cl_sem);
993 nfs4_opendata_free(opendata);
995 nfs4_put_state_owner(sp);
997 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
998 up_read(&clp->cl_sem);
1004 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
1006 struct nfs4_exception exception = { };
1007 struct nfs4_state *res;
1011 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
1014 /* NOTE: BAD_SEQID means the server and client disagree about the
1015 * book-keeping w.r.t. state-changing operations
1016 * (OPEN/CLOSE/LOCK/LOCKU...)
1017 * It is actually a sign of a bug on the client or on the server.
1019 * If we receive a BAD_SEQID error in the particular case of
1020 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1021 * have unhashed the old state_owner for us, and that we can
1022 * therefore safely retry using a new one. We should still warn
1023 * the user though...
1025 if (status == -NFS4ERR_BAD_SEQID) {
1026 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
1027 exception.retry = 1;
1031 * BAD_STATEID on OPEN means that the server cancelled our
1032 * state before it received the OPEN_CONFIRM.
1033 * Recover by retrying the request as per the discussion
1034 * on Page 181 of RFC3530.
1036 if (status == -NFS4ERR_BAD_STATEID) {
1037 exception.retry = 1;
1040 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1041 status, &exception));
1042 } while (exception.retry);
1046 static int _nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1047 struct iattr *sattr, struct nfs4_state *state)
1049 struct nfs_server *server = NFS_SERVER(inode);
1050 struct nfs_setattrargs arg = {
1051 .fh = NFS_FH(inode),
1054 .bitmask = server->attr_bitmask,
1056 struct nfs_setattrres res = {
1060 struct rpc_message msg = {
1061 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1065 unsigned long timestamp = jiffies;
1068 nfs_fattr_init(fattr);
1070 if (nfs4_copy_delegation_stateid(&arg.stateid, inode)) {
1071 /* Use that stateid */
1072 } else if (state != NULL) {
1073 msg.rpc_cred = state->owner->so_cred;
1074 nfs4_copy_stateid(&arg.stateid, state, current->files);
1076 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1078 status = rpc_call_sync(server->client, &msg, 0);
1079 if (status == 0 && state != NULL)
1080 renew_lease(server, timestamp);
1084 static int nfs4_do_setattr(struct inode *inode, struct nfs_fattr *fattr,
1085 struct iattr *sattr, struct nfs4_state *state)
1087 struct nfs_server *server = NFS_SERVER(inode);
1088 struct nfs4_exception exception = { };
1091 err = nfs4_handle_exception(server,
1092 _nfs4_do_setattr(inode, fattr, sattr, state),
1094 } while (exception.retry);
1098 struct nfs4_closedata {
1099 struct inode *inode;
1100 struct nfs4_state *state;
1101 struct nfs_closeargs arg;
1102 struct nfs_closeres res;
1103 struct nfs_fattr fattr;
1104 unsigned long timestamp;
1107 static void nfs4_free_closedata(void *data)
1109 struct nfs4_closedata *calldata = data;
1110 struct nfs4_state_owner *sp = calldata->state->owner;
1112 nfs4_put_open_state(calldata->state);
1113 nfs_free_seqid(calldata->arg.seqid);
1114 nfs4_put_state_owner(sp);
1118 static void nfs4_close_done(struct rpc_task *task, void *data)
1120 struct nfs4_closedata *calldata = data;
1121 struct nfs4_state *state = calldata->state;
1122 struct nfs_server *server = NFS_SERVER(calldata->inode);
1124 if (RPC_ASSASSINATED(task))
1126 /* hmm. we are done with the inode, and in the process of freeing
1127 * the state_owner. we keep this around to process errors
1129 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1130 switch (task->tk_status) {
1132 memcpy(&state->stateid, &calldata->res.stateid,
1133 sizeof(state->stateid));
1134 renew_lease(server, calldata->timestamp);
1136 case -NFS4ERR_STALE_STATEID:
1137 case -NFS4ERR_EXPIRED:
1138 nfs4_schedule_state_recovery(server->nfs4_state);
1141 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1142 rpc_restart_call(task);
1146 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1149 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1151 struct nfs4_closedata *calldata = data;
1152 struct nfs4_state *state = calldata->state;
1153 struct rpc_message msg = {
1154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1155 .rpc_argp = &calldata->arg,
1156 .rpc_resp = &calldata->res,
1157 .rpc_cred = state->owner->so_cred,
1159 int mode = 0, old_mode;
1161 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1163 /* Recalculate the new open mode in case someone reopened the file
1164 * while we were waiting in line to be scheduled.
1166 spin_lock(&state->owner->so_lock);
1167 spin_lock(&calldata->inode->i_lock);
1168 mode = old_mode = state->state;
1169 if (state->n_rdwr == 0) {
1170 if (state->n_rdonly == 0)
1171 mode &= ~FMODE_READ;
1172 if (state->n_wronly == 0)
1173 mode &= ~FMODE_WRITE;
1175 nfs4_state_set_mode_locked(state, mode);
1176 spin_unlock(&calldata->inode->i_lock);
1177 spin_unlock(&state->owner->so_lock);
1178 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
1179 /* Note: exit _without_ calling nfs4_close_done */
1180 task->tk_action = NULL;
1183 nfs_fattr_init(calldata->res.fattr);
1185 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1186 calldata->arg.open_flags = mode;
1187 calldata->timestamp = jiffies;
1188 rpc_call_setup(task, &msg, 0);
1191 static const struct rpc_call_ops nfs4_close_ops = {
1192 .rpc_call_prepare = nfs4_close_prepare,
1193 .rpc_call_done = nfs4_close_done,
1194 .rpc_release = nfs4_free_closedata,
1198 * It is possible for data to be read/written from a mem-mapped file
1199 * after the sys_close call (which hits the vfs layer as a flush).
1200 * This means that we can't safely call nfsv4 close on a file until
1201 * the inode is cleared. This in turn means that we are not good
1202 * NFSv4 citizens - we do not indicate to the server to update the file's
1203 * share state even when we are done with one of the three share
1204 * stateid's in the inode.
1206 * NOTE: Caller must be holding the sp->so_owner semaphore!
1208 int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
1210 struct nfs_server *server = NFS_SERVER(inode);
1211 struct nfs4_closedata *calldata;
1212 int status = -ENOMEM;
1214 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1215 if (calldata == NULL)
1217 calldata->inode = inode;
1218 calldata->state = state;
1219 calldata->arg.fh = NFS_FH(inode);
1220 calldata->arg.stateid = &state->stateid;
1221 /* Serialization for the sequence id */
1222 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1223 if (calldata->arg.seqid == NULL)
1224 goto out_free_calldata;
1225 calldata->arg.bitmask = server->attr_bitmask;
1226 calldata->res.fattr = &calldata->fattr;
1227 calldata->res.server = server;
1229 status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
1233 nfs_free_seqid(calldata->arg.seqid);
1240 static int nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
1244 filp = lookup_instantiate_filp(nd, dentry, NULL);
1245 if (!IS_ERR(filp)) {
1246 struct nfs_open_context *ctx;
1247 ctx = (struct nfs_open_context *)filp->private_data;
1251 nfs4_close_state(state, nd->intent.open.flags);
1252 return PTR_ERR(filp);
1256 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1259 struct rpc_cred *cred;
1260 struct nfs4_state *state;
1263 if (nd->flags & LOOKUP_CREATE) {
1264 attr.ia_mode = nd->intent.open.create_mode;
1265 attr.ia_valid = ATTR_MODE;
1266 if (!IS_POSIXACL(dir))
1267 attr.ia_mode &= ~current->fs->umask;
1270 BUG_ON(nd->intent.open.flags & O_CREAT);
1273 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1275 return (struct dentry *)cred;
1276 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1278 if (IS_ERR(state)) {
1279 if (PTR_ERR(state) == -ENOENT)
1280 d_add(dentry, NULL);
1281 return (struct dentry *)state;
1283 res = d_add_unique(dentry, igrab(state->inode));
1286 nfs4_intent_set_file(nd, dentry, state);
1291 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1293 struct rpc_cred *cred;
1294 struct nfs4_state *state;
1296 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1298 return PTR_ERR(cred);
1299 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1301 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1303 if (IS_ERR(state)) {
1304 switch (PTR_ERR(state)) {
1310 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1313 if (dentry->d_inode == NULL)
1318 if (state->inode == dentry->d_inode) {
1319 nfs4_intent_set_file(nd, dentry, state);
1322 nfs4_close_state(state, openflags);
1329 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1331 struct nfs4_server_caps_res res = {};
1332 struct rpc_message msg = {
1333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1334 .rpc_argp = fhandle,
1339 status = rpc_call_sync(server->client, &msg, 0);
1341 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1342 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1343 server->caps |= NFS_CAP_ACLS;
1344 if (res.has_links != 0)
1345 server->caps |= NFS_CAP_HARDLINKS;
1346 if (res.has_symlinks != 0)
1347 server->caps |= NFS_CAP_SYMLINKS;
1348 server->acl_bitmask = res.acl_bitmask;
1353 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1355 struct nfs4_exception exception = { };
1358 err = nfs4_handle_exception(server,
1359 _nfs4_server_capabilities(server, fhandle),
1361 } while (exception.retry);
1365 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1366 struct nfs_fsinfo *info)
1368 struct nfs4_lookup_root_arg args = {
1369 .bitmask = nfs4_fattr_bitmap,
1371 struct nfs4_lookup_res res = {
1373 .fattr = info->fattr,
1376 struct rpc_message msg = {
1377 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1381 nfs_fattr_init(info->fattr);
1382 return rpc_call_sync(server->client, &msg, 0);
1385 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1386 struct nfs_fsinfo *info)
1388 struct nfs4_exception exception = { };
1391 err = nfs4_handle_exception(server,
1392 _nfs4_lookup_root(server, fhandle, info),
1394 } while (exception.retry);
1398 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1399 struct nfs_fsinfo *info)
1401 struct nfs_fattr * fattr = info->fattr;
1404 struct nfs4_lookup_arg args = {
1407 .bitmask = nfs4_fattr_bitmap,
1409 struct nfs4_lookup_res res = {
1414 struct rpc_message msg = {
1415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1422 * Now we do a separate LOOKUP for each component of the mount path.
1423 * The LOOKUPs are done separately so that we can conveniently
1424 * catch an ERR_WRONGSEC if it occurs along the way...
1426 status = nfs4_lookup_root(server, fhandle, info);
1430 p = server->mnt_path;
1432 struct nfs4_exception exception = { };
1439 while (*p && (*p != '/'))
1444 nfs_fattr_init(fattr);
1445 status = nfs4_handle_exception(server,
1446 rpc_call_sync(server->client, &msg, 0),
1448 } while (exception.retry);
1451 if (status == -ENOENT) {
1452 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
1453 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
1458 status = nfs4_server_capabilities(server, fhandle);
1460 status = nfs4_do_fsinfo(server, fhandle, info);
1462 return nfs4_map_errors(status);
1466 * Get locations and (maybe) other attributes of a referral.
1467 * Note that we'll actually follow the referral later when
1468 * we detect fsid mismatch in inode revalidation
1470 static int nfs4_get_referral(struct inode *dir, struct qstr *name, struct nfs_fattr *fattr, struct nfs_fh *fhandle)
1472 int status = -ENOMEM;
1473 struct page *page = NULL;
1474 struct nfs4_fs_locations *locations = NULL;
1475 struct dentry dentry = {};
1477 page = alloc_page(GFP_KERNEL);
1480 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
1481 if (locations == NULL)
1484 dentry.d_name.name = name->name;
1485 dentry.d_name.len = name->len;
1486 status = nfs4_proc_fs_locations(dir, &dentry, locations, page);
1489 /* Make sure server returned a different fsid for the referral */
1490 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
1491 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__, name->name);
1496 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
1497 fattr->valid |= NFS_ATTR_FATTR_V4_REFERRAL;
1499 fattr->mode = S_IFDIR;
1500 memset(fhandle, 0, sizeof(struct nfs_fh));
1509 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1511 struct nfs4_getattr_arg args = {
1513 .bitmask = server->attr_bitmask,
1515 struct nfs4_getattr_res res = {
1519 struct rpc_message msg = {
1520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1525 nfs_fattr_init(fattr);
1526 return rpc_call_sync(server->client, &msg, 0);
1529 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1531 struct nfs4_exception exception = { };
1534 err = nfs4_handle_exception(server,
1535 _nfs4_proc_getattr(server, fhandle, fattr),
1537 } while (exception.retry);
1542 * The file is not closed if it is opened due to the a request to change
1543 * the size of the file. The open call will not be needed once the
1544 * VFS layer lookup-intents are implemented.
1546 * Close is called when the inode is destroyed.
1547 * If we haven't opened the file for O_WRONLY, we
1548 * need to in the size_change case to obtain a stateid.
1551 * Because OPEN is always done by name in nfsv4, it is
1552 * possible that we opened a different file by the same
1553 * name. We can recognize this race condition, but we
1554 * can't do anything about it besides returning an error.
1556 * This will be fixed with VFS changes (lookup-intent).
1559 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1560 struct iattr *sattr)
1562 struct rpc_cred *cred;
1563 struct inode *inode = dentry->d_inode;
1564 struct nfs_open_context *ctx;
1565 struct nfs4_state *state = NULL;
1568 nfs_fattr_init(fattr);
1570 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1572 return PTR_ERR(cred);
1574 /* Search for an existing open(O_WRITE) file */
1575 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1579 status = nfs4_do_setattr(inode, fattr, sattr, state);
1581 nfs_setattr_update_inode(inode, sattr);
1583 put_nfs_open_context(ctx);
1588 static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1589 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1592 struct nfs_server *server = NFS_SERVER(dir);
1593 struct nfs4_lookup_arg args = {
1594 .bitmask = server->attr_bitmask,
1595 .dir_fh = NFS_FH(dir),
1598 struct nfs4_lookup_res res = {
1603 struct rpc_message msg = {
1604 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1609 nfs_fattr_init(fattr);
1611 dprintk("NFS call lookup %s\n", name->name);
1612 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1613 if (status == -NFS4ERR_MOVED)
1614 status = nfs4_get_referral(dir, name, fattr, fhandle);
1615 dprintk("NFS reply lookup: %d\n", status);
1619 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1621 struct nfs4_exception exception = { };
1624 err = nfs4_handle_exception(NFS_SERVER(dir),
1625 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1627 } while (exception.retry);
1631 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1633 struct nfs4_accessargs args = {
1634 .fh = NFS_FH(inode),
1636 struct nfs4_accessres res = { 0 };
1637 struct rpc_message msg = {
1638 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1641 .rpc_cred = entry->cred,
1643 int mode = entry->mask;
1647 * Determine which access bits we want to ask for...
1649 if (mode & MAY_READ)
1650 args.access |= NFS4_ACCESS_READ;
1651 if (S_ISDIR(inode->i_mode)) {
1652 if (mode & MAY_WRITE)
1653 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1654 if (mode & MAY_EXEC)
1655 args.access |= NFS4_ACCESS_LOOKUP;
1657 if (mode & MAY_WRITE)
1658 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1659 if (mode & MAY_EXEC)
1660 args.access |= NFS4_ACCESS_EXECUTE;
1662 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1665 if (res.access & NFS4_ACCESS_READ)
1666 entry->mask |= MAY_READ;
1667 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1668 entry->mask |= MAY_WRITE;
1669 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1670 entry->mask |= MAY_EXEC;
1675 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1677 struct nfs4_exception exception = { };
1680 err = nfs4_handle_exception(NFS_SERVER(inode),
1681 _nfs4_proc_access(inode, entry),
1683 } while (exception.retry);
1688 * TODO: For the time being, we don't try to get any attributes
1689 * along with any of the zero-copy operations READ, READDIR,
1692 * In the case of the first three, we want to put the GETATTR
1693 * after the read-type operation -- this is because it is hard
1694 * to predict the length of a GETATTR response in v4, and thus
1695 * align the READ data correctly. This means that the GETATTR
1696 * may end up partially falling into the page cache, and we should
1697 * shift it into the 'tail' of the xdr_buf before processing.
1698 * To do this efficiently, we need to know the total length
1699 * of data received, which doesn't seem to be available outside
1702 * In the case of WRITE, we also want to put the GETATTR after
1703 * the operation -- in this case because we want to make sure
1704 * we get the post-operation mtime and size. This means that
1705 * we can't use xdr_encode_pages() as written: we need a variant
1706 * of it which would leave room in the 'tail' iovec.
1708 * Both of these changes to the XDR layer would in fact be quite
1709 * minor, but I decided to leave them for a subsequent patch.
1711 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1712 unsigned int pgbase, unsigned int pglen)
1714 struct nfs4_readlink args = {
1715 .fh = NFS_FH(inode),
1720 struct rpc_message msg = {
1721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1726 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1729 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1730 unsigned int pgbase, unsigned int pglen)
1732 struct nfs4_exception exception = { };
1735 err = nfs4_handle_exception(NFS_SERVER(inode),
1736 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1738 } while (exception.retry);
1742 static int _nfs4_proc_read(struct nfs_read_data *rdata)
1744 int flags = rdata->flags;
1745 struct inode *inode = rdata->inode;
1746 struct nfs_fattr *fattr = rdata->res.fattr;
1747 struct nfs_server *server = NFS_SERVER(inode);
1748 struct rpc_message msg = {
1749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1750 .rpc_argp = &rdata->args,
1751 .rpc_resp = &rdata->res,
1752 .rpc_cred = rdata->cred,
1754 unsigned long timestamp = jiffies;
1757 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1758 (long long) rdata->args.offset);
1760 nfs_fattr_init(fattr);
1761 status = rpc_call_sync(server->client, &msg, flags);
1763 renew_lease(server, timestamp);
1764 dprintk("NFS reply read: %d\n", status);
1768 static int nfs4_proc_read(struct nfs_read_data *rdata)
1770 struct nfs4_exception exception = { };
1773 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1774 _nfs4_proc_read(rdata),
1776 } while (exception.retry);
1780 static int _nfs4_proc_write(struct nfs_write_data *wdata)
1782 int rpcflags = wdata->flags;
1783 struct inode *inode = wdata->inode;
1784 struct nfs_fattr *fattr = wdata->res.fattr;
1785 struct nfs_server *server = NFS_SERVER(inode);
1786 struct rpc_message msg = {
1787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1788 .rpc_argp = &wdata->args,
1789 .rpc_resp = &wdata->res,
1790 .rpc_cred = wdata->cred,
1794 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1795 (long long) wdata->args.offset);
1797 wdata->args.bitmask = server->attr_bitmask;
1798 wdata->res.server = server;
1799 wdata->timestamp = jiffies;
1800 nfs_fattr_init(fattr);
1801 status = rpc_call_sync(server->client, &msg, rpcflags);
1802 dprintk("NFS reply write: %d\n", status);
1805 renew_lease(server, wdata->timestamp);
1806 nfs_post_op_update_inode(inode, fattr);
1807 return wdata->res.count;
1810 static int nfs4_proc_write(struct nfs_write_data *wdata)
1812 struct nfs4_exception exception = { };
1815 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1816 _nfs4_proc_write(wdata),
1818 } while (exception.retry);
1822 static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1824 struct inode *inode = cdata->inode;
1825 struct nfs_fattr *fattr = cdata->res.fattr;
1826 struct nfs_server *server = NFS_SERVER(inode);
1827 struct rpc_message msg = {
1828 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1829 .rpc_argp = &cdata->args,
1830 .rpc_resp = &cdata->res,
1831 .rpc_cred = cdata->cred,
1835 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1836 (long long) cdata->args.offset);
1838 cdata->args.bitmask = server->attr_bitmask;
1839 cdata->res.server = server;
1840 cdata->timestamp = jiffies;
1841 nfs_fattr_init(fattr);
1842 status = rpc_call_sync(server->client, &msg, 0);
1844 renew_lease(server, cdata->timestamp);
1845 dprintk("NFS reply commit: %d\n", status);
1847 nfs_post_op_update_inode(inode, fattr);
1851 static int nfs4_proc_commit(struct nfs_write_data *cdata)
1853 struct nfs4_exception exception = { };
1856 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1857 _nfs4_proc_commit(cdata),
1859 } while (exception.retry);
1865 * We will need to arrange for the VFS layer to provide an atomic open.
1866 * Until then, this create/open method is prone to inefficiency and race
1867 * conditions due to the lookup, create, and open VFS calls from sys_open()
1868 * placed on the wire.
1870 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1871 * The file will be opened again in the subsequent VFS open call
1872 * (nfs4_proc_file_open).
1874 * The open for read will just hang around to be used by any process that
1875 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1879 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1880 int flags, struct nameidata *nd)
1882 struct nfs4_state *state;
1883 struct rpc_cred *cred;
1886 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1888 status = PTR_ERR(cred);
1891 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1893 if (IS_ERR(state)) {
1894 status = PTR_ERR(state);
1897 d_instantiate(dentry, igrab(state->inode));
1898 if (flags & O_EXCL) {
1899 struct nfs_fattr fattr;
1900 status = nfs4_do_setattr(state->inode, &fattr, sattr, state);
1902 nfs_setattr_update_inode(state->inode, sattr);
1904 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
1905 status = nfs4_intent_set_file(nd, dentry, state);
1907 nfs4_close_state(state, flags);
1912 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1914 struct nfs_server *server = NFS_SERVER(dir);
1915 struct nfs4_remove_arg args = {
1918 .bitmask = server->attr_bitmask,
1920 struct nfs_fattr dir_attr;
1921 struct nfs4_remove_res res = {
1923 .dir_attr = &dir_attr,
1925 struct rpc_message msg = {
1926 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1932 nfs_fattr_init(res.dir_attr);
1933 status = rpc_call_sync(server->client, &msg, 0);
1935 update_changeattr(dir, &res.cinfo);
1936 nfs_post_op_update_inode(dir, res.dir_attr);
1941 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1943 struct nfs4_exception exception = { };
1946 err = nfs4_handle_exception(NFS_SERVER(dir),
1947 _nfs4_proc_remove(dir, name),
1949 } while (exception.retry);
1953 struct unlink_desc {
1954 struct nfs4_remove_arg args;
1955 struct nfs4_remove_res res;
1956 struct nfs_fattr dir_attr;
1959 static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1962 struct nfs_server *server = NFS_SERVER(dir->d_inode);
1963 struct unlink_desc *up;
1965 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
1969 up->args.fh = NFS_FH(dir->d_inode);
1970 up->args.name = name;
1971 up->args.bitmask = server->attr_bitmask;
1972 up->res.server = server;
1973 up->res.dir_attr = &up->dir_attr;
1975 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1976 msg->rpc_argp = &up->args;
1977 msg->rpc_resp = &up->res;
1981 static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1983 struct rpc_message *msg = &task->tk_msg;
1984 struct unlink_desc *up;
1986 if (msg->rpc_resp != NULL) {
1987 up = container_of(msg->rpc_resp, struct unlink_desc, res);
1988 update_changeattr(dir->d_inode, &up->res.cinfo);
1989 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1991 msg->rpc_resp = NULL;
1992 msg->rpc_argp = NULL;
1997 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1998 struct inode *new_dir, struct qstr *new_name)
2000 struct nfs_server *server = NFS_SERVER(old_dir);
2001 struct nfs4_rename_arg arg = {
2002 .old_dir = NFS_FH(old_dir),
2003 .new_dir = NFS_FH(new_dir),
2004 .old_name = old_name,
2005 .new_name = new_name,
2006 .bitmask = server->attr_bitmask,
2008 struct nfs_fattr old_fattr, new_fattr;
2009 struct nfs4_rename_res res = {
2011 .old_fattr = &old_fattr,
2012 .new_fattr = &new_fattr,
2014 struct rpc_message msg = {
2015 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2021 nfs_fattr_init(res.old_fattr);
2022 nfs_fattr_init(res.new_fattr);
2023 status = rpc_call_sync(server->client, &msg, 0);
2026 update_changeattr(old_dir, &res.old_cinfo);
2027 nfs_post_op_update_inode(old_dir, res.old_fattr);
2028 update_changeattr(new_dir, &res.new_cinfo);
2029 nfs_post_op_update_inode(new_dir, res.new_fattr);
2034 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2035 struct inode *new_dir, struct qstr *new_name)
2037 struct nfs4_exception exception = { };
2040 err = nfs4_handle_exception(NFS_SERVER(old_dir),
2041 _nfs4_proc_rename(old_dir, old_name,
2044 } while (exception.retry);
2048 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2050 struct nfs_server *server = NFS_SERVER(inode);
2051 struct nfs4_link_arg arg = {
2052 .fh = NFS_FH(inode),
2053 .dir_fh = NFS_FH(dir),
2055 .bitmask = server->attr_bitmask,
2057 struct nfs_fattr fattr, dir_attr;
2058 struct nfs4_link_res res = {
2061 .dir_attr = &dir_attr,
2063 struct rpc_message msg = {
2064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
2070 nfs_fattr_init(res.fattr);
2071 nfs_fattr_init(res.dir_attr);
2072 status = rpc_call_sync(server->client, &msg, 0);
2074 update_changeattr(dir, &res.cinfo);
2075 nfs_post_op_update_inode(dir, res.dir_attr);
2076 nfs_post_op_update_inode(inode, res.fattr);
2082 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
2084 struct nfs4_exception exception = { };
2087 err = nfs4_handle_exception(NFS_SERVER(inode),
2088 _nfs4_proc_link(inode, dir, name),
2090 } while (exception.retry);
2094 static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2095 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2096 struct nfs_fattr *fattr)
2098 struct nfs_server *server = NFS_SERVER(dir);
2099 struct nfs_fattr dir_fattr;
2100 struct nfs4_create_arg arg = {
2101 .dir_fh = NFS_FH(dir),
2106 .bitmask = server->attr_bitmask,
2108 struct nfs4_create_res res = {
2112 .dir_fattr = &dir_fattr,
2114 struct rpc_message msg = {
2115 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2121 if (path->len > NFS4_MAXPATHLEN)
2122 return -ENAMETOOLONG;
2123 arg.u.symlink = path;
2124 nfs_fattr_init(fattr);
2125 nfs_fattr_init(&dir_fattr);
2127 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2129 update_changeattr(dir, &res.dir_cinfo);
2130 nfs_post_op_update_inode(dir, res.dir_fattr);
2134 static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2135 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2136 struct nfs_fattr *fattr)
2138 struct nfs4_exception exception = { };
2141 err = nfs4_handle_exception(NFS_SERVER(dir),
2142 _nfs4_proc_symlink(dir, name, path, sattr,
2145 } while (exception.retry);
2149 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2150 struct iattr *sattr)
2152 struct nfs_server *server = NFS_SERVER(dir);
2153 struct nfs_fh fhandle;
2154 struct nfs_fattr fattr, dir_fattr;
2155 struct nfs4_create_arg arg = {
2156 .dir_fh = NFS_FH(dir),
2158 .name = &dentry->d_name,
2161 .bitmask = server->attr_bitmask,
2163 struct nfs4_create_res res = {
2167 .dir_fattr = &dir_fattr,
2169 struct rpc_message msg = {
2170 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2176 nfs_fattr_init(&fattr);
2177 nfs_fattr_init(&dir_fattr);
2179 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2181 update_changeattr(dir, &res.dir_cinfo);
2182 nfs_post_op_update_inode(dir, res.dir_fattr);
2183 status = nfs_instantiate(dentry, &fhandle, &fattr);
2188 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2189 struct iattr *sattr)
2191 struct nfs4_exception exception = { };
2194 err = nfs4_handle_exception(NFS_SERVER(dir),
2195 _nfs4_proc_mkdir(dir, dentry, sattr),
2197 } while (exception.retry);
2201 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2202 u64 cookie, struct page *page, unsigned int count, int plus)
2204 struct inode *dir = dentry->d_inode;
2205 struct nfs4_readdir_arg args = {
2210 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2212 struct nfs4_readdir_res res;
2213 struct rpc_message msg = {
2214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2221 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2222 dentry->d_parent->d_name.name,
2223 dentry->d_name.name,
2224 (unsigned long long)cookie);
2226 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2227 res.pgbase = args.pgbase;
2228 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2230 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2232 dprintk("%s: returns %d\n", __FUNCTION__, status);
2236 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2237 u64 cookie, struct page *page, unsigned int count, int plus)
2239 struct nfs4_exception exception = { };
2242 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2243 _nfs4_proc_readdir(dentry, cred, cookie,
2246 } while (exception.retry);
2250 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2251 struct iattr *sattr, dev_t rdev)
2253 struct nfs_server *server = NFS_SERVER(dir);
2255 struct nfs_fattr fattr, dir_fattr;
2256 struct nfs4_create_arg arg = {
2257 .dir_fh = NFS_FH(dir),
2259 .name = &dentry->d_name,
2261 .bitmask = server->attr_bitmask,
2263 struct nfs4_create_res res = {
2267 .dir_fattr = &dir_fattr,
2269 struct rpc_message msg = {
2270 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2275 int mode = sattr->ia_mode;
2277 nfs_fattr_init(&fattr);
2278 nfs_fattr_init(&dir_fattr);
2280 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2281 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2283 arg.ftype = NF4FIFO;
2284 else if (S_ISBLK(mode)) {
2286 arg.u.device.specdata1 = MAJOR(rdev);
2287 arg.u.device.specdata2 = MINOR(rdev);
2289 else if (S_ISCHR(mode)) {
2291 arg.u.device.specdata1 = MAJOR(rdev);
2292 arg.u.device.specdata2 = MINOR(rdev);
2295 arg.ftype = NF4SOCK;
2297 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2299 update_changeattr(dir, &res.dir_cinfo);
2300 nfs_post_op_update_inode(dir, res.dir_fattr);
2301 status = nfs_instantiate(dentry, &fh, &fattr);
2306 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2307 struct iattr *sattr, dev_t rdev)
2309 struct nfs4_exception exception = { };
2312 err = nfs4_handle_exception(NFS_SERVER(dir),
2313 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2315 } while (exception.retry);
2319 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2320 struct nfs_fsstat *fsstat)
2322 struct nfs4_statfs_arg args = {
2324 .bitmask = server->attr_bitmask,
2326 struct rpc_message msg = {
2327 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2332 nfs_fattr_init(fsstat->fattr);
2333 return rpc_call_sync(server->client, &msg, 0);
2336 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2338 struct nfs4_exception exception = { };
2341 err = nfs4_handle_exception(server,
2342 _nfs4_proc_statfs(server, fhandle, fsstat),
2344 } while (exception.retry);
2348 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2349 struct nfs_fsinfo *fsinfo)
2351 struct nfs4_fsinfo_arg args = {
2353 .bitmask = server->attr_bitmask,
2355 struct rpc_message msg = {
2356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2361 return rpc_call_sync(server->client, &msg, 0);
2364 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2366 struct nfs4_exception exception = { };
2370 err = nfs4_handle_exception(server,
2371 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2373 } while (exception.retry);
2377 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2379 nfs_fattr_init(fsinfo->fattr);
2380 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2383 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2384 struct nfs_pathconf *pathconf)
2386 struct nfs4_pathconf_arg args = {
2388 .bitmask = server->attr_bitmask,
2390 struct rpc_message msg = {
2391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2393 .rpc_resp = pathconf,
2396 /* None of the pathconf attributes are mandatory to implement */
2397 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2398 memset(pathconf, 0, sizeof(*pathconf));
2402 nfs_fattr_init(pathconf->fattr);
2403 return rpc_call_sync(server->client, &msg, 0);
2406 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2407 struct nfs_pathconf *pathconf)
2409 struct nfs4_exception exception = { };
2413 err = nfs4_handle_exception(server,
2414 _nfs4_proc_pathconf(server, fhandle, pathconf),
2416 } while (exception.retry);
2420 static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
2422 struct nfs_server *server = NFS_SERVER(data->inode);
2424 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
2425 rpc_restart_call(task);
2428 if (task->tk_status > 0)
2429 renew_lease(server, data->timestamp);
2433 static void nfs4_proc_read_setup(struct nfs_read_data *data)
2435 struct rpc_message msg = {
2436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2437 .rpc_argp = &data->args,
2438 .rpc_resp = &data->res,
2439 .rpc_cred = data->cred,
2442 data->timestamp = jiffies;
2444 rpc_call_setup(&data->task, &msg, 0);
2447 static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
2449 struct inode *inode = data->inode;
2451 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2452 rpc_restart_call(task);
2455 if (task->tk_status >= 0) {
2456 renew_lease(NFS_SERVER(inode), data->timestamp);
2457 nfs_post_op_update_inode(inode, data->res.fattr);
2462 static void nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2464 struct rpc_message msg = {
2465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2466 .rpc_argp = &data->args,
2467 .rpc_resp = &data->res,
2468 .rpc_cred = data->cred,
2470 struct inode *inode = data->inode;
2471 struct nfs_server *server = NFS_SERVER(inode);
2474 if (how & FLUSH_STABLE) {
2475 if (!NFS_I(inode)->ncommit)
2476 stable = NFS_FILE_SYNC;
2478 stable = NFS_DATA_SYNC;
2480 stable = NFS_UNSTABLE;
2481 data->args.stable = stable;
2482 data->args.bitmask = server->attr_bitmask;
2483 data->res.server = server;
2485 data->timestamp = jiffies;
2487 /* Finalize the task. */
2488 rpc_call_setup(&data->task, &msg, 0);
2491 static int nfs4_commit_done(struct rpc_task *task, struct nfs_write_data *data)
2493 struct inode *inode = data->inode;
2495 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2496 rpc_restart_call(task);
2499 if (task->tk_status >= 0)
2500 nfs_post_op_update_inode(inode, data->res.fattr);
2504 static void nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2506 struct rpc_message msg = {
2507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2508 .rpc_argp = &data->args,
2509 .rpc_resp = &data->res,
2510 .rpc_cred = data->cred,
2512 struct nfs_server *server = NFS_SERVER(data->inode);
2514 data->args.bitmask = server->attr_bitmask;
2515 data->res.server = server;
2517 rpc_call_setup(&data->task, &msg, 0);
2521 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2522 * standalone procedure for queueing an asynchronous RENEW.
2524 static void nfs4_renew_done(struct rpc_task *task, void *data)
2526 struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
2527 unsigned long timestamp = (unsigned long)data;
2529 if (task->tk_status < 0) {
2530 switch (task->tk_status) {
2531 case -NFS4ERR_STALE_CLIENTID:
2532 case -NFS4ERR_EXPIRED:
2533 case -NFS4ERR_CB_PATH_DOWN:
2534 nfs4_schedule_state_recovery(clp);
2538 spin_lock(&clp->cl_lock);
2539 if (time_before(clp->cl_last_renewal,timestamp))
2540 clp->cl_last_renewal = timestamp;
2541 spin_unlock(&clp->cl_lock);
2544 static const struct rpc_call_ops nfs4_renew_ops = {
2545 .rpc_call_done = nfs4_renew_done,
2548 int nfs4_proc_async_renew(struct nfs4_client *clp, struct rpc_cred *cred)
2550 struct rpc_message msg = {
2551 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2556 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2557 &nfs4_renew_ops, (void *)jiffies);
2560 int nfs4_proc_renew(struct nfs4_client *clp, struct rpc_cred *cred)
2562 struct rpc_message msg = {
2563 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2567 unsigned long now = jiffies;
2570 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2573 spin_lock(&clp->cl_lock);
2574 if (time_before(clp->cl_last_renewal,now))
2575 clp->cl_last_renewal = now;
2576 spin_unlock(&clp->cl_lock);
2580 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2582 return (server->caps & NFS_CAP_ACLS)
2583 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2584 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2587 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2588 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2591 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2593 static void buf_to_pages(const void *buf, size_t buflen,
2594 struct page **pages, unsigned int *pgbase)
2596 const void *p = buf;
2598 *pgbase = offset_in_page(buf);
2600 while (p < buf + buflen) {
2601 *(pages++) = virt_to_page(p);
2602 p += PAGE_CACHE_SIZE;
2606 struct nfs4_cached_acl {
2612 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2614 struct nfs_inode *nfsi = NFS_I(inode);
2616 spin_lock(&inode->i_lock);
2617 kfree(nfsi->nfs4_acl);
2618 nfsi->nfs4_acl = acl;
2619 spin_unlock(&inode->i_lock);
2622 static void nfs4_zap_acl_attr(struct inode *inode)
2624 nfs4_set_cached_acl(inode, NULL);
2627 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2629 struct nfs_inode *nfsi = NFS_I(inode);
2630 struct nfs4_cached_acl *acl;
2633 spin_lock(&inode->i_lock);
2634 acl = nfsi->nfs4_acl;
2637 if (buf == NULL) /* user is just asking for length */
2639 if (acl->cached == 0)
2641 ret = -ERANGE; /* see getxattr(2) man page */
2642 if (acl->len > buflen)
2644 memcpy(buf, acl->data, acl->len);
2648 spin_unlock(&inode->i_lock);
2652 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2654 struct nfs4_cached_acl *acl;
2656 if (buf && acl_len <= PAGE_SIZE) {
2657 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2661 memcpy(acl->data, buf, acl_len);
2663 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2670 nfs4_set_cached_acl(inode, acl);
2673 static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2675 struct page *pages[NFS4ACL_MAXPAGES];
2676 struct nfs_getaclargs args = {
2677 .fh = NFS_FH(inode),
2681 size_t resp_len = buflen;
2683 struct rpc_message msg = {
2684 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2686 .rpc_resp = &resp_len,
2688 struct page *localpage = NULL;
2691 if (buflen < PAGE_SIZE) {
2692 /* As long as we're doing a round trip to the server anyway,
2693 * let's be prepared for a page of acl data. */
2694 localpage = alloc_page(GFP_KERNEL);
2695 resp_buf = page_address(localpage);
2696 if (localpage == NULL)
2698 args.acl_pages[0] = localpage;
2699 args.acl_pgbase = 0;
2700 resp_len = args.acl_len = PAGE_SIZE;
2703 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2705 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2708 if (resp_len > args.acl_len)
2709 nfs4_write_cached_acl(inode, NULL, resp_len);
2711 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2714 if (resp_len > buflen)
2717 memcpy(buf, resp_buf, resp_len);
2722 __free_page(localpage);
2726 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2728 struct nfs_server *server = NFS_SERVER(inode);
2731 if (!nfs4_server_supports_acls(server))
2733 ret = nfs_revalidate_inode(server, inode);
2736 ret = nfs4_read_cached_acl(inode, buf, buflen);
2739 return nfs4_get_acl_uncached(inode, buf, buflen);
2742 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2744 struct nfs_server *server = NFS_SERVER(inode);
2745 struct page *pages[NFS4ACL_MAXPAGES];
2746 struct nfs_setaclargs arg = {
2747 .fh = NFS_FH(inode),
2751 struct rpc_message msg = {
2752 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2758 if (!nfs4_server_supports_acls(server))
2760 nfs_inode_return_delegation(inode);
2761 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2762 ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
2764 nfs4_write_cached_acl(inode, buf, buflen);
2769 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2771 struct nfs4_client *clp = server->nfs4_state;
2773 if (!clp || task->tk_status >= 0)
2775 switch(task->tk_status) {
2776 case -NFS4ERR_STALE_CLIENTID:
2777 case -NFS4ERR_STALE_STATEID:
2778 case -NFS4ERR_EXPIRED:
2779 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2780 nfs4_schedule_state_recovery(clp);
2781 if (test_bit(NFS4CLNT_STATE_RECOVER, &clp->cl_state) == 0)
2782 rpc_wake_up_task(task);
2783 task->tk_status = 0;
2785 case -NFS4ERR_DELAY:
2786 nfs_inc_server_stats((struct nfs_server *) server,
2788 case -NFS4ERR_GRACE:
2789 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2790 task->tk_status = 0;
2792 case -NFS4ERR_OLD_STATEID:
2793 task->tk_status = 0;
2796 task->tk_status = nfs4_map_errors(task->tk_status);
2800 static int nfs4_wait_bit_interruptible(void *word)
2802 if (signal_pending(current))
2803 return -ERESTARTSYS;
2808 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
2815 rpc_clnt_sigmask(clnt, &oldset);
2816 res = wait_on_bit(&clp->cl_state, NFS4CLNT_STATE_RECOVER,
2817 nfs4_wait_bit_interruptible,
2818 TASK_INTERRUPTIBLE);
2819 rpc_clnt_sigunmask(clnt, &oldset);
2823 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2831 *timeout = NFS4_POLL_RETRY_MIN;
2832 if (*timeout > NFS4_POLL_RETRY_MAX)
2833 *timeout = NFS4_POLL_RETRY_MAX;
2834 rpc_clnt_sigmask(clnt, &oldset);
2835 if (clnt->cl_intr) {
2836 schedule_timeout_interruptible(*timeout);
2840 schedule_timeout_uninterruptible(*timeout);
2841 rpc_clnt_sigunmask(clnt, &oldset);
2846 /* This is the error handling routine for processes that are allowed
2849 int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2851 struct nfs4_client *clp = server->nfs4_state;
2852 int ret = errorcode;
2854 exception->retry = 0;
2858 case -NFS4ERR_STALE_CLIENTID:
2859 case -NFS4ERR_STALE_STATEID:
2860 case -NFS4ERR_EXPIRED:
2861 nfs4_schedule_state_recovery(clp);
2862 ret = nfs4_wait_clnt_recover(server->client, clp);
2864 exception->retry = 1;
2866 case -NFS4ERR_GRACE:
2867 case -NFS4ERR_DELAY:
2868 ret = nfs4_delay(server->client, &exception->timeout);
2871 case -NFS4ERR_OLD_STATEID:
2872 exception->retry = 1;
2874 /* We failed to handle the error */
2875 return nfs4_map_errors(ret);
2878 int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port, struct rpc_cred *cred)
2880 nfs4_verifier sc_verifier;
2881 struct nfs4_setclientid setclientid = {
2882 .sc_verifier = &sc_verifier,
2885 struct rpc_message msg = {
2886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2887 .rpc_argp = &setclientid,
2895 p = (u32*)sc_verifier.data;
2896 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2897 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2900 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2901 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2902 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr),
2903 cred->cr_ops->cr_name,
2904 clp->cl_id_uniquifier);
2905 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2906 sizeof(setclientid.sc_netid), "tcp");
2907 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2908 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2909 clp->cl_ipaddr, port >> 8, port & 255);
2911 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2912 if (status != -NFS4ERR_CLID_INUSE)
2917 ssleep(clp->cl_lease_time + 1);
2919 if (++clp->cl_id_uniquifier == 0)
2925 static int _nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
2927 struct nfs_fsinfo fsinfo;
2928 struct rpc_message msg = {
2929 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2931 .rpc_resp = &fsinfo,
2938 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2940 spin_lock(&clp->cl_lock);
2941 clp->cl_lease_time = fsinfo.lease_time * HZ;
2942 clp->cl_last_renewal = now;
2943 clear_bit(NFS4CLNT_LEASE_EXPIRED, &clp->cl_state);
2944 spin_unlock(&clp->cl_lock);
2949 int nfs4_proc_setclientid_confirm(struct nfs4_client *clp, struct rpc_cred *cred)
2954 err = _nfs4_proc_setclientid_confirm(clp, cred);
2958 case -NFS4ERR_RESOURCE:
2959 /* The IBM lawyers misread another document! */
2960 case -NFS4ERR_DELAY:
2961 err = nfs4_delay(clp->cl_rpcclient, &timeout);
2967 struct nfs4_delegreturndata {
2968 struct nfs4_delegreturnargs args;
2969 struct nfs4_delegreturnres res;
2971 nfs4_stateid stateid;
2972 struct rpc_cred *cred;
2973 unsigned long timestamp;
2974 struct nfs_fattr fattr;
2978 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
2980 struct nfs4_delegreturndata *data = calldata;
2981 struct rpc_message msg = {
2982 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2983 .rpc_argp = &data->args,
2984 .rpc_resp = &data->res,
2985 .rpc_cred = data->cred,
2987 nfs_fattr_init(data->res.fattr);
2988 rpc_call_setup(task, &msg, 0);
2991 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2993 struct nfs4_delegreturndata *data = calldata;
2994 data->rpc_status = task->tk_status;
2995 if (data->rpc_status == 0)
2996 renew_lease(data->res.server, data->timestamp);
2999 static void nfs4_delegreturn_release(void *calldata)
3001 struct nfs4_delegreturndata *data = calldata;
3003 put_rpccred(data->cred);
3007 static const struct rpc_call_ops nfs4_delegreturn_ops = {
3008 .rpc_call_prepare = nfs4_delegreturn_prepare,
3009 .rpc_call_done = nfs4_delegreturn_done,
3010 .rpc_release = nfs4_delegreturn_release,
3013 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3015 struct nfs4_delegreturndata *data;
3016 struct nfs_server *server = NFS_SERVER(inode);
3017 struct rpc_task *task;
3020 data = kmalloc(sizeof(*data), GFP_KERNEL);
3023 data->args.fhandle = &data->fh;
3024 data->args.stateid = &data->stateid;
3025 data->args.bitmask = server->attr_bitmask;
3026 nfs_copy_fh(&data->fh, NFS_FH(inode));
3027 memcpy(&data->stateid, stateid, sizeof(data->stateid));
3028 data->res.fattr = &data->fattr;
3029 data->res.server = server;
3030 data->cred = get_rpccred(cred);
3031 data->timestamp = jiffies;
3032 data->rpc_status = 0;
3034 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
3036 return PTR_ERR(task);
3037 status = nfs4_wait_for_completion_rpc_task(task);
3039 status = data->rpc_status;
3041 nfs_post_op_update_inode(inode, &data->fattr);
3043 rpc_release_task(task);
3047 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
3049 struct nfs_server *server = NFS_SERVER(inode);
3050 struct nfs4_exception exception = { };
3053 err = _nfs4_proc_delegreturn(inode, cred, stateid);
3055 case -NFS4ERR_STALE_STATEID:
3056 case -NFS4ERR_EXPIRED:
3057 nfs4_schedule_state_recovery(server->nfs4_state);
3061 err = nfs4_handle_exception(server, err, &exception);
3062 } while (exception.retry);
3066 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3067 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3070 * sleep, with exponential backoff, and retry the LOCK operation.
3072 static unsigned long
3073 nfs4_set_lock_task_retry(unsigned long timeout)
3075 schedule_timeout_interruptible(timeout);
3077 if (timeout > NFS4_LOCK_MAXTIMEOUT)
3078 return NFS4_LOCK_MAXTIMEOUT;
3082 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3084 struct inode *inode = state->inode;
3085 struct nfs_server *server = NFS_SERVER(inode);
3086 struct nfs4_client *clp = server->nfs4_state;
3087 struct nfs_lockt_args arg = {
3088 .fh = NFS_FH(inode),
3091 struct nfs_lockt_res res = {
3094 struct rpc_message msg = {
3095 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3098 .rpc_cred = state->owner->so_cred,
3100 struct nfs4_lock_state *lsp;
3103 down_read(&clp->cl_sem);
3104 arg.lock_owner.clientid = clp->cl_clientid;
3105 status = nfs4_set_lock_state(state, request);
3108 lsp = request->fl_u.nfs4_fl.owner;
3109 arg.lock_owner.id = lsp->ls_id;
3110 status = rpc_call_sync(server->client, &msg, 0);
3113 request->fl_type = F_UNLCK;
3115 case -NFS4ERR_DENIED:
3119 up_read(&clp->cl_sem);
3123 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3125 struct nfs4_exception exception = { };
3129 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3130 _nfs4_proc_getlk(state, cmd, request),
3132 } while (exception.retry);
3136 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3139 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3141 res = posix_lock_file_wait(file, fl);
3144 res = flock_lock_file_wait(file, fl);
3150 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n",
3155 struct nfs4_unlockdata {
3156 struct nfs_locku_args arg;
3157 struct nfs_locku_res res;
3158 struct nfs4_lock_state *lsp;
3159 struct nfs_open_context *ctx;
3160 struct file_lock fl;
3161 const struct nfs_server *server;
3162 unsigned long timestamp;
3165 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3166 struct nfs_open_context *ctx,
3167 struct nfs4_lock_state *lsp,
3168 struct nfs_seqid *seqid)
3170 struct nfs4_unlockdata *p;
3171 struct inode *inode = lsp->ls_state->inode;
3173 p = kmalloc(sizeof(*p), GFP_KERNEL);
3176 p->arg.fh = NFS_FH(inode);
3178 p->arg.seqid = seqid;
3179 p->arg.stateid = &lsp->ls_stateid;
3181 atomic_inc(&lsp->ls_count);
3182 /* Ensure we don't close file until we're done freeing locks! */
3183 p->ctx = get_nfs_open_context(ctx);
3184 memcpy(&p->fl, fl, sizeof(p->fl));
3185 p->server = NFS_SERVER(inode);
3189 static void nfs4_locku_release_calldata(void *data)
3191 struct nfs4_unlockdata *calldata = data;
3192 nfs_free_seqid(calldata->arg.seqid);
3193 nfs4_put_lock_state(calldata->lsp);
3194 put_nfs_open_context(calldata->ctx);
3198 static void nfs4_locku_done(struct rpc_task *task, void *data)
3200 struct nfs4_unlockdata *calldata = data;
3202 if (RPC_ASSASSINATED(task))
3204 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
3205 switch (task->tk_status) {
3207 memcpy(calldata->lsp->ls_stateid.data,
3208 calldata->res.stateid.data,
3209 sizeof(calldata->lsp->ls_stateid.data));
3210 renew_lease(calldata->server, calldata->timestamp);
3212 case -NFS4ERR_STALE_STATEID:
3213 case -NFS4ERR_EXPIRED:
3214 nfs4_schedule_state_recovery(calldata->server->nfs4_state);
3217 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
3218 rpc_restart_call(task);
3223 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3225 struct nfs4_unlockdata *calldata = data;
3226 struct rpc_message msg = {
3227 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3228 .rpc_argp = &calldata->arg,
3229 .rpc_resp = &calldata->res,
3230 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
3233 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3235 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3236 /* Note: exit _without_ running nfs4_locku_done */
3237 task->tk_action = NULL;
3240 calldata->timestamp = jiffies;
3241 rpc_call_setup(task, &msg, 0);
3244 static const struct rpc_call_ops nfs4_locku_ops = {
3245 .rpc_call_prepare = nfs4_locku_prepare,
3246 .rpc_call_done = nfs4_locku_done,
3247 .rpc_release = nfs4_locku_release_calldata,
3250 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3251 struct nfs_open_context *ctx,
3252 struct nfs4_lock_state *lsp,
3253 struct nfs_seqid *seqid)
3255 struct nfs4_unlockdata *data;
3257 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3259 nfs_free_seqid(seqid);
3260 return ERR_PTR(-ENOMEM);
3263 /* Unlock _before_ we do the RPC call */
3264 do_vfs_lock(fl->fl_file, fl);
3265 return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
3268 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3270 struct nfs_seqid *seqid;
3271 struct nfs4_lock_state *lsp;
3272 struct rpc_task *task;
3275 /* Is this a delegated lock? */
3276 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3278 /* Is this open_owner holding any locks on the server? */
3279 if (test_bit(LK_STATE_IN_USE, &state->flags) == 0)
3282 status = nfs4_set_lock_state(state, request);
3285 lsp = request->fl_u.nfs4_fl.owner;
3287 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3290 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3291 status = PTR_ERR(task);
3294 status = nfs4_wait_for_completion_rpc_task(task);
3295 rpc_release_task(task);
3298 do_vfs_lock(request->fl_file, request);
3302 struct nfs4_lockdata {
3303 struct nfs_lock_args arg;
3304 struct nfs_lock_res res;
3305 struct nfs4_lock_state *lsp;
3306 struct nfs_open_context *ctx;
3307 struct file_lock fl;
3308 unsigned long timestamp;
3313 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3314 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3316 struct nfs4_lockdata *p;
3317 struct inode *inode = lsp->ls_state->inode;
3318 struct nfs_server *server = NFS_SERVER(inode);
3320 p = kzalloc(sizeof(*p), GFP_KERNEL);
3324 p->arg.fh = NFS_FH(inode);
3326 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3327 if (p->arg.lock_seqid == NULL)
3329 p->arg.lock_stateid = &lsp->ls_stateid;
3330 p->arg.lock_owner.clientid = server->nfs4_state->cl_clientid;
3331 p->arg.lock_owner.id = lsp->ls_id;
3333 atomic_inc(&lsp->ls_count);
3334 p->ctx = get_nfs_open_context(ctx);
3335 memcpy(&p->fl, fl, sizeof(p->fl));
3342 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3344 struct nfs4_lockdata *data = calldata;
3345 struct nfs4_state *state = data->lsp->ls_state;
3346 struct nfs4_state_owner *sp = state->owner;
3347 struct rpc_message msg = {
3348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3349 .rpc_argp = &data->arg,
3350 .rpc_resp = &data->res,
3351 .rpc_cred = sp->so_cred,
3354 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3356 dprintk("%s: begin!\n", __FUNCTION__);
3357 /* Do we need to do an open_to_lock_owner? */
3358 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3359 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3360 if (data->arg.open_seqid == NULL) {
3361 data->rpc_status = -ENOMEM;
3362 task->tk_action = NULL;
3365 data->arg.open_stateid = &state->stateid;
3366 data->arg.new_lock_owner = 1;
3368 data->timestamp = jiffies;
3369 rpc_call_setup(task, &msg, 0);
3371 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3374 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3376 struct nfs4_lockdata *data = calldata;
3378 dprintk("%s: begin!\n", __FUNCTION__);
3380 data->rpc_status = task->tk_status;
3381 if (RPC_ASSASSINATED(task))
3383 if (data->arg.new_lock_owner != 0) {
3384 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3385 if (data->rpc_status == 0)
3386 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3390 if (data->rpc_status == 0) {
3391 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3392 sizeof(data->lsp->ls_stateid.data));
3393 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3394 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
3396 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3398 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3401 static void nfs4_lock_release(void *calldata)
3403 struct nfs4_lockdata *data = calldata;
3405 dprintk("%s: begin!\n", __FUNCTION__);
3406 if (data->arg.open_seqid != NULL)
3407 nfs_free_seqid(data->arg.open_seqid);
3408 if (data->cancelled != 0) {
3409 struct rpc_task *task;
3410 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3411 data->arg.lock_seqid);
3413 rpc_release_task(task);
3414 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3416 nfs_free_seqid(data->arg.lock_seqid);
3417 nfs4_put_lock_state(data->lsp);
3418 put_nfs_open_context(data->ctx);
3420 dprintk("%s: done!\n", __FUNCTION__);
3423 static const struct rpc_call_ops nfs4_lock_ops = {
3424 .rpc_call_prepare = nfs4_lock_prepare,
3425 .rpc_call_done = nfs4_lock_done,
3426 .rpc_release = nfs4_lock_release,
3429 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3431 struct nfs4_lockdata *data;
3432 struct rpc_task *task;
3435 dprintk("%s: begin!\n", __FUNCTION__);
3436 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3437 fl->fl_u.nfs4_fl.owner);
3441 data->arg.block = 1;
3443 data->arg.reclaim = 1;
3444 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3445 &nfs4_lock_ops, data);
3447 return PTR_ERR(task);
3448 ret = nfs4_wait_for_completion_rpc_task(task);
3450 ret = data->rpc_status;
3451 if (ret == -NFS4ERR_DENIED)
3454 data->cancelled = 1;
3455 rpc_release_task(task);
3456 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3460 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3462 struct nfs_server *server = NFS_SERVER(state->inode);
3463 struct nfs4_exception exception = { };
3466 /* Cache the lock if possible... */
3467 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3470 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3471 if (err != -NFS4ERR_DELAY)
3473 nfs4_handle_exception(server, err, &exception);
3474 } while (exception.retry);
3478 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3480 struct nfs_server *server = NFS_SERVER(state->inode);
3481 struct nfs4_exception exception = { };
3484 err = nfs4_set_lock_state(state, request);
3488 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3489 if (err != -NFS4ERR_DELAY)
3491 nfs4_handle_exception(server, err, &exception);
3492 } while (exception.retry);
3496 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3498 struct nfs4_client *clp = state->owner->so_client;
3501 /* Is this a delegated open? */
3502 if (NFS_I(state->inode)->delegation_state != 0) {
3503 /* Yes: cache locks! */
3504 status = do_vfs_lock(request->fl_file, request);
3505 /* ...but avoid races with delegation recall... */
3506 if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags))
3509 down_read(&clp->cl_sem);
3510 status = nfs4_set_lock_state(state, request);
3513 status = _nfs4_do_setlk(state, cmd, request, 0);
3516 /* Note: we always want to sleep here! */
3517 request->fl_flags |= FL_SLEEP;
3518 if (do_vfs_lock(request->fl_file, request) < 0)
3519 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3521 up_read(&clp->cl_sem);
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 = (struct nfs_open_context *)filp->private_data;
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 if (!S_ISREG(inode->i_mode) &&
3604 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3607 return nfs4_proc_set_acl(inode, buf, buflen);
3610 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3611 * and that's what we'll do for e.g. user attributes that haven't been set.
3612 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3613 * attributes in kernel-managed attribute namespaces. */
3614 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3617 struct inode *inode = dentry->d_inode;
3619 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3622 return nfs4_proc_get_acl(inode, buf, buflen);
3625 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3627 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3629 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
3631 if (buf && buflen < len)
3634 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3638 int nfs4_proc_fs_locations(struct inode *dir, struct dentry *dentry,
3639 struct nfs4_fs_locations *fs_locations, struct page *page)
3641 struct nfs_server *server = NFS_SERVER(dir);
3643 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
3644 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID,
3646 struct nfs4_fs_locations_arg args = {
3647 .dir_fh = NFS_FH(dir),
3648 .name = &dentry->d_name,
3652 struct rpc_message msg = {
3653 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
3655 .rpc_resp = fs_locations,
3659 dprintk("%s: start\n", __FUNCTION__);
3660 fs_locations->fattr.valid = 0;
3661 fs_locations->server = server;
3662 fs_locations->nlocations = 0;
3663 status = rpc_call_sync(server->client, &msg, 0);
3664 dprintk("%s: returned status = %d\n", __FUNCTION__, status);
3668 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3669 .recover_open = nfs4_open_reclaim,
3670 .recover_lock = nfs4_lock_reclaim,
3673 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3674 .recover_open = nfs4_open_expired,
3675 .recover_lock = nfs4_lock_expired,
3678 static struct inode_operations nfs4_file_inode_operations = {
3679 .permission = nfs_permission,
3680 .getattr = nfs_getattr,
3681 .setattr = nfs_setattr,
3682 .getxattr = nfs4_getxattr,
3683 .setxattr = nfs4_setxattr,
3684 .listxattr = nfs4_listxattr,
3687 struct nfs_rpc_ops nfs_v4_clientops = {
3688 .version = 4, /* protocol version */
3689 .dentry_ops = &nfs4_dentry_operations,
3690 .dir_inode_ops = &nfs4_dir_inode_operations,
3691 .file_inode_ops = &nfs4_file_inode_operations,
3692 .getroot = nfs4_proc_get_root,
3693 .getattr = nfs4_proc_getattr,
3694 .setattr = nfs4_proc_setattr,
3695 .lookup = nfs4_proc_lookup,
3696 .access = nfs4_proc_access,
3697 .readlink = nfs4_proc_readlink,
3698 .read = nfs4_proc_read,
3699 .write = nfs4_proc_write,
3700 .commit = nfs4_proc_commit,
3701 .create = nfs4_proc_create,
3702 .remove = nfs4_proc_remove,
3703 .unlink_setup = nfs4_proc_unlink_setup,
3704 .unlink_done = nfs4_proc_unlink_done,
3705 .rename = nfs4_proc_rename,
3706 .link = nfs4_proc_link,
3707 .symlink = nfs4_proc_symlink,
3708 .mkdir = nfs4_proc_mkdir,
3709 .rmdir = nfs4_proc_remove,
3710 .readdir = nfs4_proc_readdir,
3711 .mknod = nfs4_proc_mknod,
3712 .statfs = nfs4_proc_statfs,
3713 .fsinfo = nfs4_proc_fsinfo,
3714 .pathconf = nfs4_proc_pathconf,
3715 .decode_dirent = nfs4_decode_dirent,
3716 .read_setup = nfs4_proc_read_setup,
3717 .read_done = nfs4_read_done,
3718 .write_setup = nfs4_proc_write_setup,
3719 .write_done = nfs4_write_done,
3720 .commit_setup = nfs4_proc_commit_setup,
3721 .commit_done = nfs4_commit_done,
3722 .file_open = nfs_open,
3723 .file_release = nfs_release,
3724 .lock = nfs4_proc_lock,
3725 .clear_acl_cache = nfs4_zap_acl_attr,