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"
55 #define NFSDBG_FACILITY NFSDBG_PROC
57 #define NFS4_POLL_RETRY_MIN (1*HZ)
58 #define NFS4_POLL_RETRY_MAX (15*HZ)
61 static int _nfs4_proc_open(struct nfs4_opendata *data);
62 static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
63 static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *);
64 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry);
65 static int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception);
66 extern u32 *nfs4_decode_dirent(u32 *p, struct nfs_entry *entry, int plus);
67 extern struct rpc_procinfo nfs4_procedures[];
69 /* Prevent leaks of NFSv4 errors into userland */
70 int nfs4_map_errors(int err)
73 dprintk("%s could not handle NFSv4 error %d\n",
81 * This is our standard bitmap for GETATTR requests.
83 const u32 nfs4_fattr_bitmap[2] = {
88 | FATTR4_WORD0_FILEID,
90 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
100 const u32 nfs4_statfs_bitmap[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
109 const u32 nfs4_pathconf_bitmap[2] = {
111 | FATTR4_WORD0_MAXNAME,
115 const u32 nfs4_fsinfo_bitmap[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME,
122 static void nfs4_setup_readdir(u64 cookie, u32 *verifier, struct dentry *dentry,
123 struct nfs4_readdir_arg *readdir)
127 BUG_ON(readdir->count < 80);
129 readdir->cookie = cookie;
130 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
135 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
140 * NFSv4 servers do not return entries for '.' and '..'
141 * Therefore, we fake these entries here. We let '.'
142 * have cookie 0 and '..' have cookie 1. Note that
143 * when talking to the server, we always send cookie 0
146 start = p = (u32 *)kmap_atomic(*readdir->pages, KM_USER0);
149 *p++ = xdr_one; /* next */
150 *p++ = xdr_zero; /* cookie, first word */
151 *p++ = xdr_one; /* cookie, second word */
152 *p++ = xdr_one; /* entry len */
153 memcpy(p, ".\0\0\0", 4); /* entry */
155 *p++ = xdr_one; /* bitmap length */
156 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
157 *p++ = htonl(8); /* attribute buffer length */
158 p = xdr_encode_hyper(p, dentry->d_inode->i_ino);
161 *p++ = xdr_one; /* next */
162 *p++ = xdr_zero; /* cookie, first word */
163 *p++ = xdr_two; /* cookie, second word */
164 *p++ = xdr_two; /* entry len */
165 memcpy(p, "..\0\0", 4); /* entry */
167 *p++ = xdr_one; /* bitmap length */
168 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
169 *p++ = htonl(8); /* attribute buffer length */
170 p = xdr_encode_hyper(p, dentry->d_parent->d_inode->i_ino);
172 readdir->pgbase = (char *)p - (char *)start;
173 readdir->count -= readdir->pgbase;
174 kunmap_atomic(start, KM_USER0);
178 renew_lease(struct nfs_server *server, unsigned long timestamp)
180 struct nfs4_client *clp = server->nfs4_state;
181 spin_lock(&clp->cl_lock);
182 if (time_before(clp->cl_last_renewal,timestamp))
183 clp->cl_last_renewal = timestamp;
184 spin_unlock(&clp->cl_lock);
187 static void update_changeattr(struct inode *inode, struct nfs4_change_info *cinfo)
189 struct nfs_inode *nfsi = NFS_I(inode);
191 spin_lock(&inode->i_lock);
192 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
193 if (cinfo->before == nfsi->change_attr && cinfo->atomic)
194 nfsi->change_attr = cinfo->after;
195 spin_unlock(&inode->i_lock);
198 struct nfs4_opendata {
200 struct nfs_openargs o_arg;
201 struct nfs_openres o_res;
202 struct nfs_open_confirmargs c_arg;
203 struct nfs_open_confirmres c_res;
204 struct nfs_fattr f_attr;
205 struct nfs_fattr dir_attr;
206 struct dentry *dentry;
208 struct nfs4_state_owner *owner;
214 static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
215 struct nfs4_state_owner *sp, int flags,
216 const struct iattr *attrs)
218 struct dentry *parent = dget_parent(dentry);
219 struct inode *dir = parent->d_inode;
220 struct nfs_server *server = NFS_SERVER(dir);
221 struct nfs4_opendata *p;
223 p = kzalloc(sizeof(*p), GFP_KERNEL);
226 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid);
227 if (p->o_arg.seqid == NULL)
229 atomic_set(&p->count, 1);
230 p->dentry = dget(dentry);
233 atomic_inc(&sp->so_count);
234 p->o_arg.fh = NFS_FH(dir);
235 p->o_arg.open_flags = flags,
236 p->o_arg.clientid = server->nfs4_state->cl_clientid;
237 p->o_arg.id = sp->so_id;
238 p->o_arg.name = &dentry->d_name;
239 p->o_arg.server = server;
240 p->o_arg.bitmask = server->attr_bitmask;
241 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
242 p->o_res.f_attr = &p->f_attr;
243 p->o_res.dir_attr = &p->dir_attr;
244 p->o_res.server = server;
245 nfs_fattr_init(&p->f_attr);
246 nfs_fattr_init(&p->dir_attr);
247 if (flags & O_EXCL) {
248 u32 *s = (u32 *) p->o_arg.u.verifier.data;
251 } else if (flags & O_CREAT) {
252 p->o_arg.u.attrs = &p->attrs;
253 memcpy(&p->attrs, attrs, sizeof(p->attrs));
255 p->c_arg.fh = &p->o_res.fh;
256 p->c_arg.stateid = &p->o_res.stateid;
257 p->c_arg.seqid = p->o_arg.seqid;
266 static void nfs4_opendata_free(struct nfs4_opendata *p)
268 if (p != NULL && atomic_dec_and_test(&p->count)) {
269 nfs_free_seqid(p->o_arg.seqid);
270 nfs4_put_state_owner(p->owner);
277 /* Helper for asynchronous RPC calls */
278 static int nfs4_call_async(struct rpc_clnt *clnt,
279 const struct rpc_call_ops *tk_ops, void *calldata)
281 struct rpc_task *task;
283 if (!(task = rpc_new_task(clnt, RPC_TASK_ASYNC, tk_ops, calldata)))
289 static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
294 rpc_clnt_sigmask(task->tk_client, &oldset);
295 ret = rpc_wait_for_completion_task(task);
296 rpc_clnt_sigunmask(task->tk_client, &oldset);
300 static inline void update_open_stateflags(struct nfs4_state *state, mode_t open_flags)
302 switch (open_flags) {
309 case FMODE_READ|FMODE_WRITE:
314 static void update_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, int open_flags)
316 struct inode *inode = state->inode;
318 open_flags &= (FMODE_READ|FMODE_WRITE);
319 /* Protect against nfs4_find_state_byowner() */
320 spin_lock(&state->owner->so_lock);
321 spin_lock(&inode->i_lock);
322 memcpy(&state->stateid, stateid, sizeof(state->stateid));
323 update_open_stateflags(state, open_flags);
324 nfs4_state_set_mode_locked(state, state->state | open_flags);
325 spin_unlock(&inode->i_lock);
326 spin_unlock(&state->owner->so_lock);
329 static struct nfs4_state *nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
332 struct nfs4_state *state = NULL;
334 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
336 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
339 state = nfs4_get_open_state(inode, data->owner);
342 update_open_stateid(state, &data->o_res.stateid, data->o_arg.open_flags);
349 static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
351 struct nfs_inode *nfsi = NFS_I(state->inode);
352 struct nfs_open_context *ctx;
354 spin_lock(&state->inode->i_lock);
355 list_for_each_entry(ctx, &nfsi->open_files, list) {
356 if (ctx->state != state)
358 get_nfs_open_context(ctx);
359 spin_unlock(&state->inode->i_lock);
362 spin_unlock(&state->inode->i_lock);
363 return ERR_PTR(-ENOENT);
366 static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, mode_t openflags, nfs4_stateid *stateid)
370 opendata->o_arg.open_flags = openflags;
371 ret = _nfs4_proc_open(opendata);
374 memcpy(stateid->data, opendata->o_res.stateid.data,
375 sizeof(stateid->data));
379 static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
381 nfs4_stateid stateid;
382 struct nfs4_state *newstate;
387 /* memory barrier prior to reading state->n_* */
389 if (state->n_rdwr != 0) {
390 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &stateid);
393 mode |= FMODE_READ|FMODE_WRITE;
394 if (opendata->o_res.delegation_type != 0)
395 delegation = opendata->o_res.delegation_type;
398 if (state->n_wronly != 0) {
399 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &stateid);
403 if (opendata->o_res.delegation_type != 0)
404 delegation = opendata->o_res.delegation_type;
407 if (state->n_rdonly != 0) {
408 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &stateid);
413 clear_bit(NFS_DELEGATED_STATE, &state->flags);
416 if (opendata->o_res.delegation_type == 0)
417 opendata->o_res.delegation_type = delegation;
418 opendata->o_arg.open_flags |= mode;
419 newstate = nfs4_opendata_to_nfs4_state(opendata);
420 if (newstate != NULL) {
421 if (opendata->o_res.delegation_type != 0) {
422 struct nfs_inode *nfsi = NFS_I(newstate->inode);
423 int delegation_flags = 0;
424 if (nfsi->delegation)
425 delegation_flags = nfsi->delegation->flags;
426 if (!(delegation_flags & NFS_DELEGATION_NEED_RECLAIM))
427 nfs_inode_set_delegation(newstate->inode,
428 opendata->owner->so_cred,
431 nfs_inode_reclaim_delegation(newstate->inode,
432 opendata->owner->so_cred,
435 nfs4_close_state(newstate, opendata->o_arg.open_flags);
437 if (newstate != state)
444 * reclaim state on the server after a reboot.
446 static int _nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
448 struct nfs_delegation *delegation = NFS_I(state->inode)->delegation;
449 struct nfs4_opendata *opendata;
450 int delegation_type = 0;
453 if (delegation != NULL) {
454 if (!(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
455 memcpy(&state->stateid, &delegation->stateid,
456 sizeof(state->stateid));
457 set_bit(NFS_DELEGATED_STATE, &state->flags);
460 delegation_type = delegation->type;
462 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
463 if (opendata == NULL)
465 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
466 opendata->o_arg.fh = NFS_FH(state->inode);
467 nfs_copy_fh(&opendata->o_res.fh, opendata->o_arg.fh);
468 opendata->o_arg.u.delegation_type = delegation_type;
469 status = nfs4_open_recover(opendata, state);
470 nfs4_opendata_free(opendata);
474 static int nfs4_do_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
476 struct nfs_server *server = NFS_SERVER(state->inode);
477 struct nfs4_exception exception = { };
480 err = _nfs4_do_open_reclaim(sp, state, dentry);
481 if (err != -NFS4ERR_DELAY)
483 nfs4_handle_exception(server, err, &exception);
484 } while (exception.retry);
488 static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
490 struct nfs_open_context *ctx;
493 ctx = nfs4_state_find_open_context(state);
496 ret = nfs4_do_open_reclaim(sp, state, ctx->dentry);
497 put_nfs_open_context(ctx);
501 static int _nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
503 struct nfs4_state_owner *sp = state->owner;
504 struct nfs4_opendata *opendata;
507 if (!test_bit(NFS_DELEGATED_STATE, &state->flags))
509 opendata = nfs4_opendata_alloc(dentry, sp, 0, NULL);
510 if (opendata == NULL)
512 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
513 memcpy(opendata->o_arg.u.delegation.data, state->stateid.data,
514 sizeof(opendata->o_arg.u.delegation.data));
515 ret = nfs4_open_recover(opendata, state);
516 nfs4_opendata_free(opendata);
520 int nfs4_open_delegation_recall(struct dentry *dentry, struct nfs4_state *state)
522 struct nfs4_exception exception = { };
523 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
526 err = _nfs4_open_delegation_recall(dentry, state);
530 case -NFS4ERR_STALE_CLIENTID:
531 case -NFS4ERR_STALE_STATEID:
532 case -NFS4ERR_EXPIRED:
533 /* Don't recall a delegation if it was lost */
534 nfs4_schedule_state_recovery(server->nfs4_state);
537 err = nfs4_handle_exception(server, err, &exception);
538 } while (exception.retry);
542 static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
544 struct nfs4_opendata *data = calldata;
545 struct rpc_message msg = {
546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
547 .rpc_argp = &data->c_arg,
548 .rpc_resp = &data->c_res,
549 .rpc_cred = data->owner->so_cred,
551 rpc_call_setup(task, &msg, 0);
554 static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
556 struct nfs4_opendata *data = calldata;
558 data->rpc_status = task->tk_status;
559 if (RPC_ASSASSINATED(task))
561 if (data->rpc_status == 0)
562 memcpy(data->o_res.stateid.data, data->c_res.stateid.data,
563 sizeof(data->o_res.stateid.data));
564 nfs_increment_open_seqid(data->rpc_status, data->c_arg.seqid);
565 nfs_confirm_seqid(&data->owner->so_seqid, data->rpc_status);
568 static void nfs4_open_confirm_release(void *calldata)
570 struct nfs4_opendata *data = calldata;
571 struct nfs4_state *state = NULL;
573 /* If this request hasn't been cancelled, do nothing */
574 if (data->cancelled == 0)
576 /* In case of error, no cleanup! */
577 if (data->rpc_status != 0)
579 nfs_confirm_seqid(&data->owner->so_seqid, 0);
580 state = nfs4_opendata_to_nfs4_state(data);
582 nfs4_close_state(state, data->o_arg.open_flags);
584 nfs4_opendata_free(data);
587 static const struct rpc_call_ops nfs4_open_confirm_ops = {
588 .rpc_call_prepare = nfs4_open_confirm_prepare,
589 .rpc_call_done = nfs4_open_confirm_done,
590 .rpc_release = nfs4_open_confirm_release,
594 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
596 static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
598 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
599 struct rpc_task *task;
602 atomic_inc(&data->count);
603 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_confirm_ops, data);
605 nfs4_opendata_free(data);
606 return PTR_ERR(task);
608 status = nfs4_wait_for_completion_rpc_task(task);
613 status = data->rpc_status;
614 rpc_release_task(task);
618 static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
620 struct nfs4_opendata *data = calldata;
621 struct nfs4_state_owner *sp = data->owner;
622 struct rpc_message msg = {
623 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
624 .rpc_argp = &data->o_arg,
625 .rpc_resp = &data->o_res,
626 .rpc_cred = sp->so_cred,
629 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
631 /* Update sequence id. */
632 data->o_arg.id = sp->so_id;
633 data->o_arg.clientid = sp->so_client->cl_clientid;
634 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
635 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
636 rpc_call_setup(task, &msg, 0);
639 static void nfs4_open_done(struct rpc_task *task, void *calldata)
641 struct nfs4_opendata *data = calldata;
643 data->rpc_status = task->tk_status;
644 if (RPC_ASSASSINATED(task))
646 if (task->tk_status == 0) {
647 switch (data->o_res.f_attr->mode & S_IFMT) {
651 data->rpc_status = -ELOOP;
654 data->rpc_status = -EISDIR;
657 data->rpc_status = -ENOTDIR;
660 nfs_increment_open_seqid(data->rpc_status, data->o_arg.seqid);
663 static void nfs4_open_release(void *calldata)
665 struct nfs4_opendata *data = calldata;
666 struct nfs4_state *state = NULL;
668 /* If this request hasn't been cancelled, do nothing */
669 if (data->cancelled == 0)
671 /* In case of error, no cleanup! */
672 if (data->rpc_status != 0)
674 /* In case we need an open_confirm, no cleanup! */
675 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
677 nfs_confirm_seqid(&data->owner->so_seqid, 0);
678 state = nfs4_opendata_to_nfs4_state(data);
680 nfs4_close_state(state, data->o_arg.open_flags);
682 nfs4_opendata_free(data);
685 static const struct rpc_call_ops nfs4_open_ops = {
686 .rpc_call_prepare = nfs4_open_prepare,
687 .rpc_call_done = nfs4_open_done,
688 .rpc_release = nfs4_open_release,
692 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
694 static int _nfs4_proc_open(struct nfs4_opendata *data)
696 struct inode *dir = data->dir->d_inode;
697 struct nfs_server *server = NFS_SERVER(dir);
698 struct nfs_openargs *o_arg = &data->o_arg;
699 struct nfs_openres *o_res = &data->o_res;
700 struct rpc_task *task;
703 atomic_inc(&data->count);
704 task = rpc_run_task(server->client, RPC_TASK_ASYNC, &nfs4_open_ops, data);
706 nfs4_opendata_free(data);
707 return PTR_ERR(task);
709 status = nfs4_wait_for_completion_rpc_task(task);
714 status = data->rpc_status;
715 rpc_release_task(task);
719 if (o_arg->open_flags & O_CREAT) {
720 update_changeattr(dir, &o_res->cinfo);
721 nfs_post_op_update_inode(dir, o_res->dir_attr);
723 nfs_refresh_inode(dir, o_res->dir_attr);
724 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
725 status = _nfs4_proc_open_confirm(data);
729 nfs_confirm_seqid(&data->owner->so_seqid, 0);
730 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
731 return server->rpc_ops->getattr(server, &o_res->fh, o_res->f_attr);
735 static int _nfs4_do_access(struct inode *inode, struct rpc_cred *cred, int openflags)
737 struct nfs_access_entry cache;
741 if (openflags & FMODE_READ)
743 if (openflags & FMODE_WRITE)
745 status = nfs_access_get_cached(inode, cred, &cache);
749 /* Be clever: ask server to check for all possible rights */
750 cache.mask = MAY_EXEC | MAY_WRITE | MAY_READ;
752 cache.jiffies = jiffies;
753 status = _nfs4_proc_access(inode, &cache);
756 nfs_access_add_cache(inode, &cache);
758 if ((cache.mask & mask) == mask)
765 * reclaim state on the server after a network partition.
766 * Assumes caller holds the appropriate lock
768 static int _nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
770 struct inode *inode = state->inode;
771 struct nfs_delegation *delegation = NFS_I(inode)->delegation;
772 struct nfs4_opendata *opendata;
773 int openflags = state->state & (FMODE_READ|FMODE_WRITE);
776 if (delegation != NULL && !(delegation->flags & NFS_DELEGATION_NEED_RECLAIM)) {
777 ret = _nfs4_do_access(inode, sp->so_cred, openflags);
780 memcpy(&state->stateid, &delegation->stateid, sizeof(state->stateid));
781 set_bit(NFS_DELEGATED_STATE, &state->flags);
784 opendata = nfs4_opendata_alloc(dentry, sp, openflags, NULL);
785 if (opendata == NULL)
787 ret = nfs4_open_recover(opendata, state);
788 if (ret == -ESTALE) {
789 /* Invalidate the state owner so we don't ever use it again */
790 nfs4_drop_state_owner(sp);
793 nfs4_opendata_free(opendata);
797 static inline int nfs4_do_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state, struct dentry *dentry)
799 struct nfs_server *server = NFS_SERVER(dentry->d_inode);
800 struct nfs4_exception exception = { };
804 err = _nfs4_open_expired(sp, state, dentry);
805 if (err == -NFS4ERR_DELAY)
806 nfs4_handle_exception(server, err, &exception);
807 } while (exception.retry);
811 static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
813 struct nfs_open_context *ctx;
816 ctx = nfs4_state_find_open_context(state);
819 ret = nfs4_do_open_expired(sp, state, ctx->dentry);
820 put_nfs_open_context(ctx);
825 * Returns a referenced nfs4_state if there is an open delegation on the file
827 static int _nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred, struct nfs4_state **res)
829 struct nfs_delegation *delegation;
830 struct nfs_server *server = NFS_SERVER(inode);
831 struct nfs4_client *clp = server->nfs4_state;
832 struct nfs_inode *nfsi = NFS_I(inode);
833 struct nfs4_state_owner *sp = NULL;
834 struct nfs4_state *state = NULL;
835 int open_flags = flags & (FMODE_READ|FMODE_WRITE);
838 /* Protect against reboot recovery - NOTE ORDER! */
839 down_read(&clp->cl_sem);
840 /* Protect against delegation recall */
841 down_read(&nfsi->rwsem);
842 delegation = NFS_I(inode)->delegation;
844 if (delegation == NULL || (delegation->type & open_flags) != open_flags)
847 if (!(sp = nfs4_get_state_owner(server, cred))) {
848 dprintk("%s: nfs4_get_state_owner failed!\n", __FUNCTION__);
851 state = nfs4_get_open_state(inode, sp);
856 if ((state->state & open_flags) == open_flags) {
857 spin_lock(&inode->i_lock);
858 update_open_stateflags(state, open_flags);
859 spin_unlock(&inode->i_lock);
861 } else if (state->state != 0)
865 err = _nfs4_do_access(inode, cred, open_flags);
869 set_bit(NFS_DELEGATED_STATE, &state->flags);
870 update_open_stateid(state, &delegation->stateid, open_flags);
872 nfs4_put_state_owner(sp);
873 up_read(&nfsi->rwsem);
874 up_read(&clp->cl_sem);
880 nfs4_put_open_state(state);
881 nfs4_put_state_owner(sp);
883 up_read(&nfsi->rwsem);
884 up_read(&clp->cl_sem);
886 nfs_inode_return_delegation(inode);
890 static struct nfs4_state *nfs4_open_delegated(struct inode *inode, int flags, struct rpc_cred *cred)
892 struct nfs4_exception exception = { };
893 struct nfs4_state *res;
897 err = _nfs4_open_delegated(inode, flags, cred, &res);
900 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(inode),
902 } while (exception.retry);
907 * Returns a referenced nfs4_state
909 static int _nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred, struct nfs4_state **res)
911 struct nfs4_state_owner *sp;
912 struct nfs4_state *state = NULL;
913 struct nfs_server *server = NFS_SERVER(dir);
914 struct nfs4_client *clp = server->nfs4_state;
915 struct nfs4_opendata *opendata;
918 /* Protect against reboot recovery conflicts */
919 down_read(&clp->cl_sem);
921 if (!(sp = nfs4_get_state_owner(server, cred))) {
922 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
925 opendata = nfs4_opendata_alloc(dentry, sp, flags, sattr);
926 if (opendata == NULL)
927 goto err_put_state_owner;
929 status = _nfs4_proc_open(opendata);
931 goto err_opendata_free;
934 state = nfs4_opendata_to_nfs4_state(opendata);
936 goto err_opendata_free;
937 if (opendata->o_res.delegation_type != 0)
938 nfs_inode_set_delegation(state->inode, cred, &opendata->o_res);
939 nfs4_opendata_free(opendata);
940 nfs4_put_state_owner(sp);
941 up_read(&clp->cl_sem);
945 nfs4_opendata_free(opendata);
947 nfs4_put_state_owner(sp);
949 /* Note: clp->cl_sem must be released before nfs4_put_open_state()! */
950 up_read(&clp->cl_sem);
956 static struct nfs4_state *nfs4_do_open(struct inode *dir, struct dentry *dentry, int flags, struct iattr *sattr, struct rpc_cred *cred)
958 struct nfs4_exception exception = { };
959 struct nfs4_state *res;
963 status = _nfs4_do_open(dir, dentry, flags, sattr, cred, &res);
966 /* NOTE: BAD_SEQID means the server and client disagree about the
967 * book-keeping w.r.t. state-changing operations
968 * (OPEN/CLOSE/LOCK/LOCKU...)
969 * It is actually a sign of a bug on the client or on the server.
971 * If we receive a BAD_SEQID error in the particular case of
972 * doing an OPEN, we assume that nfs_increment_open_seqid() will
973 * have unhashed the old state_owner for us, and that we can
974 * therefore safely retry using a new one. We should still warn
977 if (status == -NFS4ERR_BAD_SEQID) {
978 printk(KERN_WARNING "NFS: v4 server returned a bad sequence-id error!\n");
983 * BAD_STATEID on OPEN means that the server cancelled our
984 * state before it received the OPEN_CONFIRM.
985 * Recover by retrying the request as per the discussion
986 * on Page 181 of RFC3530.
988 if (status == -NFS4ERR_BAD_STATEID) {
992 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
993 status, &exception));
994 } while (exception.retry);
998 static int _nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
999 struct nfs_fh *fhandle, struct iattr *sattr,
1000 struct nfs4_state *state)
1002 struct nfs_setattrargs arg = {
1006 .bitmask = server->attr_bitmask,
1008 struct nfs_setattrres res = {
1012 struct rpc_message msg = {
1013 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
1019 nfs_fattr_init(fattr);
1021 if (state != NULL) {
1022 msg.rpc_cred = state->owner->so_cred;
1023 nfs4_copy_stateid(&arg.stateid, state, current->files);
1025 memcpy(&arg.stateid, &zero_stateid, sizeof(arg.stateid));
1027 status = rpc_call_sync(server->client, &msg, 0);
1031 static int nfs4_do_setattr(struct nfs_server *server, struct nfs_fattr *fattr,
1032 struct nfs_fh *fhandle, struct iattr *sattr,
1033 struct nfs4_state *state)
1035 struct nfs4_exception exception = { };
1038 err = nfs4_handle_exception(server,
1039 _nfs4_do_setattr(server, fattr, fhandle, sattr,
1042 } while (exception.retry);
1046 struct nfs4_closedata {
1047 struct inode *inode;
1048 struct nfs4_state *state;
1049 struct nfs_closeargs arg;
1050 struct nfs_closeres res;
1051 struct nfs_fattr fattr;
1054 static void nfs4_free_closedata(void *data)
1056 struct nfs4_closedata *calldata = data;
1057 struct nfs4_state_owner *sp = calldata->state->owner;
1059 nfs4_put_open_state(calldata->state);
1060 nfs_free_seqid(calldata->arg.seqid);
1061 nfs4_put_state_owner(sp);
1065 static void nfs4_close_done(struct rpc_task *task, void *data)
1067 struct nfs4_closedata *calldata = data;
1068 struct nfs4_state *state = calldata->state;
1069 struct nfs_server *server = NFS_SERVER(calldata->inode);
1071 if (RPC_ASSASSINATED(task))
1073 /* hmm. we are done with the inode, and in the process of freeing
1074 * the state_owner. we keep this around to process errors
1076 nfs_increment_open_seqid(task->tk_status, calldata->arg.seqid);
1077 switch (task->tk_status) {
1079 memcpy(&state->stateid, &calldata->res.stateid,
1080 sizeof(state->stateid));
1082 case -NFS4ERR_STALE_STATEID:
1083 case -NFS4ERR_EXPIRED:
1084 nfs4_schedule_state_recovery(server->nfs4_state);
1087 if (nfs4_async_handle_error(task, server) == -EAGAIN) {
1088 rpc_restart_call(task);
1092 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
1095 static void nfs4_close_prepare(struct rpc_task *task, void *data)
1097 struct nfs4_closedata *calldata = data;
1098 struct nfs4_state *state = calldata->state;
1099 struct rpc_message msg = {
1100 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
1101 .rpc_argp = &calldata->arg,
1102 .rpc_resp = &calldata->res,
1103 .rpc_cred = state->owner->so_cred,
1105 int mode = 0, old_mode;
1107 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
1109 /* Recalculate the new open mode in case someone reopened the file
1110 * while we were waiting in line to be scheduled.
1112 spin_lock(&state->owner->so_lock);
1113 spin_lock(&calldata->inode->i_lock);
1114 mode = old_mode = state->state;
1115 if (state->n_rdwr == 0) {
1116 if (state->n_rdonly == 0)
1117 mode &= ~FMODE_READ;
1118 if (state->n_wronly == 0)
1119 mode &= ~FMODE_WRITE;
1121 nfs4_state_set_mode_locked(state, mode);
1122 spin_unlock(&calldata->inode->i_lock);
1123 spin_unlock(&state->owner->so_lock);
1124 if (mode == old_mode || test_bit(NFS_DELEGATED_STATE, &state->flags)) {
1125 /* Note: exit _without_ calling nfs4_close_done */
1126 task->tk_action = NULL;
1129 nfs_fattr_init(calldata->res.fattr);
1131 msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
1132 calldata->arg.open_flags = mode;
1133 rpc_call_setup(task, &msg, 0);
1136 static const struct rpc_call_ops nfs4_close_ops = {
1137 .rpc_call_prepare = nfs4_close_prepare,
1138 .rpc_call_done = nfs4_close_done,
1139 .rpc_release = nfs4_free_closedata,
1143 * It is possible for data to be read/written from a mem-mapped file
1144 * after the sys_close call (which hits the vfs layer as a flush).
1145 * This means that we can't safely call nfsv4 close on a file until
1146 * the inode is cleared. This in turn means that we are not good
1147 * NFSv4 citizens - we do not indicate to the server to update the file's
1148 * share state even when we are done with one of the three share
1149 * stateid's in the inode.
1151 * NOTE: Caller must be holding the sp->so_owner semaphore!
1153 int nfs4_do_close(struct inode *inode, struct nfs4_state *state)
1155 struct nfs_server *server = NFS_SERVER(inode);
1156 struct nfs4_closedata *calldata;
1157 int status = -ENOMEM;
1159 calldata = kmalloc(sizeof(*calldata), GFP_KERNEL);
1160 if (calldata == NULL)
1162 calldata->inode = inode;
1163 calldata->state = state;
1164 calldata->arg.fh = NFS_FH(inode);
1165 calldata->arg.stateid = &state->stateid;
1166 /* Serialization for the sequence id */
1167 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid);
1168 if (calldata->arg.seqid == NULL)
1169 goto out_free_calldata;
1170 calldata->arg.bitmask = server->attr_bitmask;
1171 calldata->res.fattr = &calldata->fattr;
1172 calldata->res.server = server;
1174 status = nfs4_call_async(server->client, &nfs4_close_ops, calldata);
1178 nfs_free_seqid(calldata->arg.seqid);
1185 static void nfs4_intent_set_file(struct nameidata *nd, struct dentry *dentry, struct nfs4_state *state)
1189 filp = lookup_instantiate_filp(nd, dentry, NULL);
1190 if (!IS_ERR(filp)) {
1191 struct nfs_open_context *ctx;
1192 ctx = (struct nfs_open_context *)filp->private_data;
1195 nfs4_close_state(state, nd->intent.open.flags);
1199 nfs4_atomic_open(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
1202 struct rpc_cred *cred;
1203 struct nfs4_state *state;
1206 if (nd->flags & LOOKUP_CREATE) {
1207 attr.ia_mode = nd->intent.open.create_mode;
1208 attr.ia_valid = ATTR_MODE;
1209 if (!IS_POSIXACL(dir))
1210 attr.ia_mode &= ~current->fs->umask;
1213 BUG_ON(nd->intent.open.flags & O_CREAT);
1216 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1218 return (struct dentry *)cred;
1219 state = nfs4_do_open(dir, dentry, nd->intent.open.flags, &attr, cred);
1221 if (IS_ERR(state)) {
1222 if (PTR_ERR(state) == -ENOENT)
1223 d_add(dentry, NULL);
1224 return (struct dentry *)state;
1226 res = d_add_unique(dentry, igrab(state->inode));
1229 nfs4_intent_set_file(nd, dentry, state);
1234 nfs4_open_revalidate(struct inode *dir, struct dentry *dentry, int openflags, struct nameidata *nd)
1236 struct rpc_cred *cred;
1237 struct nfs4_state *state;
1239 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1241 return PTR_ERR(cred);
1242 state = nfs4_open_delegated(dentry->d_inode, openflags, cred);
1244 state = nfs4_do_open(dir, dentry, openflags, NULL, cred);
1246 if (IS_ERR(state)) {
1247 switch (PTR_ERR(state)) {
1253 lookup_instantiate_filp(nd, (struct dentry *)state, NULL);
1256 if (dentry->d_inode == NULL)
1261 if (state->inode == dentry->d_inode) {
1262 nfs4_intent_set_file(nd, dentry, state);
1265 nfs4_close_state(state, openflags);
1272 static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1274 struct nfs4_server_caps_res res = {};
1275 struct rpc_message msg = {
1276 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
1277 .rpc_argp = fhandle,
1282 status = rpc_call_sync(server->client, &msg, 0);
1284 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
1285 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
1286 server->caps |= NFS_CAP_ACLS;
1287 if (res.has_links != 0)
1288 server->caps |= NFS_CAP_HARDLINKS;
1289 if (res.has_symlinks != 0)
1290 server->caps |= NFS_CAP_SYMLINKS;
1291 server->acl_bitmask = res.acl_bitmask;
1296 static int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1298 struct nfs4_exception exception = { };
1301 err = nfs4_handle_exception(server,
1302 _nfs4_server_capabilities(server, fhandle),
1304 } while (exception.retry);
1308 static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1309 struct nfs_fsinfo *info)
1311 struct nfs4_lookup_root_arg args = {
1312 .bitmask = nfs4_fattr_bitmap,
1314 struct nfs4_lookup_res res = {
1316 .fattr = info->fattr,
1319 struct rpc_message msg = {
1320 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
1324 nfs_fattr_init(info->fattr);
1325 return rpc_call_sync(server->client, &msg, 0);
1328 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
1329 struct nfs_fsinfo *info)
1331 struct nfs4_exception exception = { };
1334 err = nfs4_handle_exception(server,
1335 _nfs4_lookup_root(server, fhandle, info),
1337 } while (exception.retry);
1341 static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle,
1342 struct nfs_fsinfo *info)
1344 struct nfs_fattr * fattr = info->fattr;
1347 struct nfs4_lookup_arg args = {
1350 .bitmask = nfs4_fattr_bitmap,
1352 struct nfs4_lookup_res res = {
1357 struct rpc_message msg = {
1358 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1365 * Now we do a separate LOOKUP for each component of the mount path.
1366 * The LOOKUPs are done separately so that we can conveniently
1367 * catch an ERR_WRONGSEC if it occurs along the way...
1369 status = nfs4_lookup_root(server, fhandle, info);
1373 p = server->mnt_path;
1375 struct nfs4_exception exception = { };
1382 while (*p && (*p != '/'))
1387 nfs_fattr_init(fattr);
1388 status = nfs4_handle_exception(server,
1389 rpc_call_sync(server->client, &msg, 0),
1391 } while (exception.retry);
1394 if (status == -ENOENT) {
1395 printk(KERN_NOTICE "NFS: mount path %s does not exist!\n", server->mnt_path);
1396 printk(KERN_NOTICE "NFS: suggestion: try mounting '/' instead.\n");
1401 status = nfs4_server_capabilities(server, fhandle);
1403 status = nfs4_do_fsinfo(server, fhandle, info);
1408 static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1410 struct nfs4_getattr_arg args = {
1412 .bitmask = server->attr_bitmask,
1414 struct nfs4_getattr_res res = {
1418 struct rpc_message msg = {
1419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
1424 nfs_fattr_init(fattr);
1425 return rpc_call_sync(server->client, &msg, 0);
1428 static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1430 struct nfs4_exception exception = { };
1433 err = nfs4_handle_exception(server,
1434 _nfs4_proc_getattr(server, fhandle, fattr),
1436 } while (exception.retry);
1441 * The file is not closed if it is opened due to the a request to change
1442 * the size of the file. The open call will not be needed once the
1443 * VFS layer lookup-intents are implemented.
1445 * Close is called when the inode is destroyed.
1446 * If we haven't opened the file for O_WRONLY, we
1447 * need to in the size_change case to obtain a stateid.
1450 * Because OPEN is always done by name in nfsv4, it is
1451 * possible that we opened a different file by the same
1452 * name. We can recognize this race condition, but we
1453 * can't do anything about it besides returning an error.
1455 * This will be fixed with VFS changes (lookup-intent).
1458 nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
1459 struct iattr *sattr)
1461 struct rpc_cred *cred;
1462 struct inode *inode = dentry->d_inode;
1463 struct nfs_open_context *ctx;
1464 struct nfs4_state *state = NULL;
1467 nfs_fattr_init(fattr);
1469 cred = rpcauth_lookupcred(NFS_SERVER(inode)->client->cl_auth, 0);
1471 return PTR_ERR(cred);
1473 /* Search for an existing open(O_WRITE) file */
1474 ctx = nfs_find_open_context(inode, cred, FMODE_WRITE);
1478 status = nfs4_do_setattr(NFS_SERVER(inode), fattr,
1479 NFS_FH(inode), sattr, state);
1481 nfs_setattr_update_inode(inode, sattr);
1483 put_nfs_open_context(ctx);
1488 static int _nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1489 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1492 struct nfs_server *server = NFS_SERVER(dir);
1493 struct nfs4_lookup_arg args = {
1494 .bitmask = server->attr_bitmask,
1495 .dir_fh = NFS_FH(dir),
1498 struct nfs4_lookup_res res = {
1503 struct rpc_message msg = {
1504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
1509 nfs_fattr_init(fattr);
1511 dprintk("NFS call lookup %s\n", name->name);
1512 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
1513 dprintk("NFS reply lookup: %d\n", status);
1517 static int nfs4_proc_lookup(struct inode *dir, struct qstr *name, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
1519 struct nfs4_exception exception = { };
1522 err = nfs4_handle_exception(NFS_SERVER(dir),
1523 _nfs4_proc_lookup(dir, name, fhandle, fattr),
1525 } while (exception.retry);
1529 static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1531 struct nfs4_accessargs args = {
1532 .fh = NFS_FH(inode),
1534 struct nfs4_accessres res = { 0 };
1535 struct rpc_message msg = {
1536 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
1539 .rpc_cred = entry->cred,
1541 int mode = entry->mask;
1545 * Determine which access bits we want to ask for...
1547 if (mode & MAY_READ)
1548 args.access |= NFS4_ACCESS_READ;
1549 if (S_ISDIR(inode->i_mode)) {
1550 if (mode & MAY_WRITE)
1551 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
1552 if (mode & MAY_EXEC)
1553 args.access |= NFS4_ACCESS_LOOKUP;
1555 if (mode & MAY_WRITE)
1556 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
1557 if (mode & MAY_EXEC)
1558 args.access |= NFS4_ACCESS_EXECUTE;
1560 status = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1563 if (res.access & NFS4_ACCESS_READ)
1564 entry->mask |= MAY_READ;
1565 if (res.access & (NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE))
1566 entry->mask |= MAY_WRITE;
1567 if (res.access & (NFS4_ACCESS_LOOKUP|NFS4_ACCESS_EXECUTE))
1568 entry->mask |= MAY_EXEC;
1573 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
1575 struct nfs4_exception exception = { };
1578 err = nfs4_handle_exception(NFS_SERVER(inode),
1579 _nfs4_proc_access(inode, entry),
1581 } while (exception.retry);
1586 * TODO: For the time being, we don't try to get any attributes
1587 * along with any of the zero-copy operations READ, READDIR,
1590 * In the case of the first three, we want to put the GETATTR
1591 * after the read-type operation -- this is because it is hard
1592 * to predict the length of a GETATTR response in v4, and thus
1593 * align the READ data correctly. This means that the GETATTR
1594 * may end up partially falling into the page cache, and we should
1595 * shift it into the 'tail' of the xdr_buf before processing.
1596 * To do this efficiently, we need to know the total length
1597 * of data received, which doesn't seem to be available outside
1600 * In the case of WRITE, we also want to put the GETATTR after
1601 * the operation -- in this case because we want to make sure
1602 * we get the post-operation mtime and size. This means that
1603 * we can't use xdr_encode_pages() as written: we need a variant
1604 * of it which would leave room in the 'tail' iovec.
1606 * Both of these changes to the XDR layer would in fact be quite
1607 * minor, but I decided to leave them for a subsequent patch.
1609 static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
1610 unsigned int pgbase, unsigned int pglen)
1612 struct nfs4_readlink args = {
1613 .fh = NFS_FH(inode),
1618 struct rpc_message msg = {
1619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
1624 return rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
1627 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
1628 unsigned int pgbase, unsigned int pglen)
1630 struct nfs4_exception exception = { };
1633 err = nfs4_handle_exception(NFS_SERVER(inode),
1634 _nfs4_proc_readlink(inode, page, pgbase, pglen),
1636 } while (exception.retry);
1640 static int _nfs4_proc_read(struct nfs_read_data *rdata)
1642 int flags = rdata->flags;
1643 struct inode *inode = rdata->inode;
1644 struct nfs_fattr *fattr = rdata->res.fattr;
1645 struct nfs_server *server = NFS_SERVER(inode);
1646 struct rpc_message msg = {
1647 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
1648 .rpc_argp = &rdata->args,
1649 .rpc_resp = &rdata->res,
1650 .rpc_cred = rdata->cred,
1652 unsigned long timestamp = jiffies;
1655 dprintk("NFS call read %d @ %Ld\n", rdata->args.count,
1656 (long long) rdata->args.offset);
1658 nfs_fattr_init(fattr);
1659 status = rpc_call_sync(server->client, &msg, flags);
1661 renew_lease(server, timestamp);
1662 dprintk("NFS reply read: %d\n", status);
1666 static int nfs4_proc_read(struct nfs_read_data *rdata)
1668 struct nfs4_exception exception = { };
1671 err = nfs4_handle_exception(NFS_SERVER(rdata->inode),
1672 _nfs4_proc_read(rdata),
1674 } while (exception.retry);
1678 static int _nfs4_proc_write(struct nfs_write_data *wdata)
1680 int rpcflags = wdata->flags;
1681 struct inode *inode = wdata->inode;
1682 struct nfs_fattr *fattr = wdata->res.fattr;
1683 struct nfs_server *server = NFS_SERVER(inode);
1684 struct rpc_message msg = {
1685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
1686 .rpc_argp = &wdata->args,
1687 .rpc_resp = &wdata->res,
1688 .rpc_cred = wdata->cred,
1692 dprintk("NFS call write %d @ %Ld\n", wdata->args.count,
1693 (long long) wdata->args.offset);
1695 wdata->args.bitmask = server->attr_bitmask;
1696 wdata->res.server = server;
1697 nfs_fattr_init(fattr);
1698 status = rpc_call_sync(server->client, &msg, rpcflags);
1699 dprintk("NFS reply write: %d\n", status);
1702 nfs_post_op_update_inode(inode, fattr);
1703 return wdata->res.count;
1706 static int nfs4_proc_write(struct nfs_write_data *wdata)
1708 struct nfs4_exception exception = { };
1711 err = nfs4_handle_exception(NFS_SERVER(wdata->inode),
1712 _nfs4_proc_write(wdata),
1714 } while (exception.retry);
1718 static int _nfs4_proc_commit(struct nfs_write_data *cdata)
1720 struct inode *inode = cdata->inode;
1721 struct nfs_fattr *fattr = cdata->res.fattr;
1722 struct nfs_server *server = NFS_SERVER(inode);
1723 struct rpc_message msg = {
1724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
1725 .rpc_argp = &cdata->args,
1726 .rpc_resp = &cdata->res,
1727 .rpc_cred = cdata->cred,
1731 dprintk("NFS call commit %d @ %Ld\n", cdata->args.count,
1732 (long long) cdata->args.offset);
1734 cdata->args.bitmask = server->attr_bitmask;
1735 cdata->res.server = server;
1736 nfs_fattr_init(fattr);
1737 status = rpc_call_sync(server->client, &msg, 0);
1738 dprintk("NFS reply commit: %d\n", status);
1740 nfs_post_op_update_inode(inode, fattr);
1744 static int nfs4_proc_commit(struct nfs_write_data *cdata)
1746 struct nfs4_exception exception = { };
1749 err = nfs4_handle_exception(NFS_SERVER(cdata->inode),
1750 _nfs4_proc_commit(cdata),
1752 } while (exception.retry);
1758 * We will need to arrange for the VFS layer to provide an atomic open.
1759 * Until then, this create/open method is prone to inefficiency and race
1760 * conditions due to the lookup, create, and open VFS calls from sys_open()
1761 * placed on the wire.
1763 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1764 * The file will be opened again in the subsequent VFS open call
1765 * (nfs4_proc_file_open).
1767 * The open for read will just hang around to be used by any process that
1768 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1772 nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
1773 int flags, struct nameidata *nd)
1775 struct nfs4_state *state;
1776 struct rpc_cred *cred;
1779 cred = rpcauth_lookupcred(NFS_SERVER(dir)->client->cl_auth, 0);
1781 status = PTR_ERR(cred);
1784 state = nfs4_do_open(dir, dentry, flags, sattr, cred);
1786 if (IS_ERR(state)) {
1787 status = PTR_ERR(state);
1790 d_instantiate(dentry, igrab(state->inode));
1791 if (flags & O_EXCL) {
1792 struct nfs_fattr fattr;
1793 status = nfs4_do_setattr(NFS_SERVER(dir), &fattr,
1794 NFS_FH(state->inode), sattr, state);
1796 nfs_setattr_update_inode(state->inode, sattr);
1798 if (status == 0 && nd != NULL && (nd->flags & LOOKUP_OPEN))
1799 nfs4_intent_set_file(nd, dentry, state);
1801 nfs4_close_state(state, flags);
1806 static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
1808 struct nfs_server *server = NFS_SERVER(dir);
1809 struct nfs4_remove_arg args = {
1812 .bitmask = server->attr_bitmask,
1814 struct nfs_fattr dir_attr;
1815 struct nfs4_remove_res res = {
1817 .dir_attr = &dir_attr,
1819 struct rpc_message msg = {
1820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
1826 nfs_fattr_init(res.dir_attr);
1827 status = rpc_call_sync(server->client, &msg, 0);
1829 update_changeattr(dir, &res.cinfo);
1830 nfs_post_op_update_inode(dir, res.dir_attr);
1835 static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
1837 struct nfs4_exception exception = { };
1840 err = nfs4_handle_exception(NFS_SERVER(dir),
1841 _nfs4_proc_remove(dir, name),
1843 } while (exception.retry);
1847 struct unlink_desc {
1848 struct nfs4_remove_arg args;
1849 struct nfs4_remove_res res;
1850 struct nfs_fattr dir_attr;
1853 static int nfs4_proc_unlink_setup(struct rpc_message *msg, struct dentry *dir,
1856 struct nfs_server *server = NFS_SERVER(dir->d_inode);
1857 struct unlink_desc *up;
1859 up = (struct unlink_desc *) kmalloc(sizeof(*up), GFP_KERNEL);
1863 up->args.fh = NFS_FH(dir->d_inode);
1864 up->args.name = name;
1865 up->args.bitmask = server->attr_bitmask;
1866 up->res.server = server;
1867 up->res.dir_attr = &up->dir_attr;
1869 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
1870 msg->rpc_argp = &up->args;
1871 msg->rpc_resp = &up->res;
1875 static int nfs4_proc_unlink_done(struct dentry *dir, struct rpc_task *task)
1877 struct rpc_message *msg = &task->tk_msg;
1878 struct unlink_desc *up;
1880 if (msg->rpc_resp != NULL) {
1881 up = container_of(msg->rpc_resp, struct unlink_desc, res);
1882 update_changeattr(dir->d_inode, &up->res.cinfo);
1883 nfs_post_op_update_inode(dir->d_inode, up->res.dir_attr);
1885 msg->rpc_resp = NULL;
1886 msg->rpc_argp = NULL;
1891 static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1892 struct inode *new_dir, struct qstr *new_name)
1894 struct nfs_server *server = NFS_SERVER(old_dir);
1895 struct nfs4_rename_arg arg = {
1896 .old_dir = NFS_FH(old_dir),
1897 .new_dir = NFS_FH(new_dir),
1898 .old_name = old_name,
1899 .new_name = new_name,
1900 .bitmask = server->attr_bitmask,
1902 struct nfs_fattr old_fattr, new_fattr;
1903 struct nfs4_rename_res res = {
1905 .old_fattr = &old_fattr,
1906 .new_fattr = &new_fattr,
1908 struct rpc_message msg = {
1909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
1915 nfs_fattr_init(res.old_fattr);
1916 nfs_fattr_init(res.new_fattr);
1917 status = rpc_call_sync(server->client, &msg, 0);
1920 update_changeattr(old_dir, &res.old_cinfo);
1921 nfs_post_op_update_inode(old_dir, res.old_fattr);
1922 update_changeattr(new_dir, &res.new_cinfo);
1923 nfs_post_op_update_inode(new_dir, res.new_fattr);
1928 static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
1929 struct inode *new_dir, struct qstr *new_name)
1931 struct nfs4_exception exception = { };
1934 err = nfs4_handle_exception(NFS_SERVER(old_dir),
1935 _nfs4_proc_rename(old_dir, old_name,
1938 } while (exception.retry);
1942 static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1944 struct nfs_server *server = NFS_SERVER(inode);
1945 struct nfs4_link_arg arg = {
1946 .fh = NFS_FH(inode),
1947 .dir_fh = NFS_FH(dir),
1949 .bitmask = server->attr_bitmask,
1951 struct nfs_fattr fattr, dir_attr;
1952 struct nfs4_link_res res = {
1955 .dir_attr = &dir_attr,
1957 struct rpc_message msg = {
1958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
1964 nfs_fattr_init(res.fattr);
1965 nfs_fattr_init(res.dir_attr);
1966 status = rpc_call_sync(server->client, &msg, 0);
1968 update_changeattr(dir, &res.cinfo);
1969 nfs_post_op_update_inode(dir, res.dir_attr);
1970 nfs_refresh_inode(inode, res.fattr);
1976 static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
1978 struct nfs4_exception exception = { };
1981 err = nfs4_handle_exception(NFS_SERVER(inode),
1982 _nfs4_proc_link(inode, dir, name),
1984 } while (exception.retry);
1988 static int _nfs4_proc_symlink(struct inode *dir, struct qstr *name,
1989 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
1990 struct nfs_fattr *fattr)
1992 struct nfs_server *server = NFS_SERVER(dir);
1993 struct nfs_fattr dir_fattr;
1994 struct nfs4_create_arg arg = {
1995 .dir_fh = NFS_FH(dir),
2000 .bitmask = server->attr_bitmask,
2002 struct nfs4_create_res res = {
2006 .dir_fattr = &dir_fattr,
2008 struct rpc_message msg = {
2009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK],
2015 if (path->len > NFS4_MAXPATHLEN)
2016 return -ENAMETOOLONG;
2017 arg.u.symlink = path;
2018 nfs_fattr_init(fattr);
2019 nfs_fattr_init(&dir_fattr);
2021 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2023 update_changeattr(dir, &res.dir_cinfo);
2024 nfs_post_op_update_inode(dir, res.dir_fattr);
2028 static int nfs4_proc_symlink(struct inode *dir, struct qstr *name,
2029 struct qstr *path, struct iattr *sattr, struct nfs_fh *fhandle,
2030 struct nfs_fattr *fattr)
2032 struct nfs4_exception exception = { };
2035 err = nfs4_handle_exception(NFS_SERVER(dir),
2036 _nfs4_proc_symlink(dir, name, path, sattr,
2039 } while (exception.retry);
2043 static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2044 struct iattr *sattr)
2046 struct nfs_server *server = NFS_SERVER(dir);
2047 struct nfs_fh fhandle;
2048 struct nfs_fattr fattr, dir_fattr;
2049 struct nfs4_create_arg arg = {
2050 .dir_fh = NFS_FH(dir),
2052 .name = &dentry->d_name,
2055 .bitmask = server->attr_bitmask,
2057 struct nfs4_create_res res = {
2061 .dir_fattr = &dir_fattr,
2063 struct rpc_message msg = {
2064 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2070 nfs_fattr_init(&fattr);
2071 nfs_fattr_init(&dir_fattr);
2073 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2075 update_changeattr(dir, &res.dir_cinfo);
2076 nfs_post_op_update_inode(dir, res.dir_fattr);
2077 status = nfs_instantiate(dentry, &fhandle, &fattr);
2082 static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
2083 struct iattr *sattr)
2085 struct nfs4_exception exception = { };
2088 err = nfs4_handle_exception(NFS_SERVER(dir),
2089 _nfs4_proc_mkdir(dir, dentry, sattr),
2091 } while (exception.retry);
2095 static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2096 u64 cookie, struct page *page, unsigned int count, int plus)
2098 struct inode *dir = dentry->d_inode;
2099 struct nfs4_readdir_arg args = {
2104 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
2106 struct nfs4_readdir_res res;
2107 struct rpc_message msg = {
2108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
2115 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__,
2116 dentry->d_parent->d_name.name,
2117 dentry->d_name.name,
2118 (unsigned long long)cookie);
2120 nfs4_setup_readdir(cookie, NFS_COOKIEVERF(dir), dentry, &args);
2121 res.pgbase = args.pgbase;
2122 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2124 memcpy(NFS_COOKIEVERF(dir), res.verifier.data, NFS4_VERIFIER_SIZE);
2126 dprintk("%s: returns %d\n", __FUNCTION__, status);
2130 static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
2131 u64 cookie, struct page *page, unsigned int count, int plus)
2133 struct nfs4_exception exception = { };
2136 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
2137 _nfs4_proc_readdir(dentry, cred, cookie,
2140 } while (exception.retry);
2144 static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2145 struct iattr *sattr, dev_t rdev)
2147 struct nfs_server *server = NFS_SERVER(dir);
2149 struct nfs_fattr fattr, dir_fattr;
2150 struct nfs4_create_arg arg = {
2151 .dir_fh = NFS_FH(dir),
2153 .name = &dentry->d_name,
2155 .bitmask = server->attr_bitmask,
2157 struct nfs4_create_res res = {
2161 .dir_fattr = &dir_fattr,
2163 struct rpc_message msg = {
2164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE],
2169 int mode = sattr->ia_mode;
2171 nfs_fattr_init(&fattr);
2172 nfs_fattr_init(&dir_fattr);
2174 BUG_ON(!(sattr->ia_valid & ATTR_MODE));
2175 BUG_ON(!S_ISFIFO(mode) && !S_ISBLK(mode) && !S_ISCHR(mode) && !S_ISSOCK(mode));
2177 arg.ftype = NF4FIFO;
2178 else if (S_ISBLK(mode)) {
2180 arg.u.device.specdata1 = MAJOR(rdev);
2181 arg.u.device.specdata2 = MINOR(rdev);
2183 else if (S_ISCHR(mode)) {
2185 arg.u.device.specdata1 = MAJOR(rdev);
2186 arg.u.device.specdata2 = MINOR(rdev);
2189 arg.ftype = NF4SOCK;
2191 status = rpc_call_sync(NFS_CLIENT(dir), &msg, 0);
2193 update_changeattr(dir, &res.dir_cinfo);
2194 nfs_post_op_update_inode(dir, res.dir_fattr);
2195 status = nfs_instantiate(dentry, &fh, &fattr);
2200 static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
2201 struct iattr *sattr, dev_t rdev)
2203 struct nfs4_exception exception = { };
2206 err = nfs4_handle_exception(NFS_SERVER(dir),
2207 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
2209 } while (exception.retry);
2213 static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
2214 struct nfs_fsstat *fsstat)
2216 struct nfs4_statfs_arg args = {
2218 .bitmask = server->attr_bitmask,
2220 struct rpc_message msg = {
2221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
2226 nfs_fattr_init(fsstat->fattr);
2227 return rpc_call_sync(server->client, &msg, 0);
2230 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
2232 struct nfs4_exception exception = { };
2235 err = nfs4_handle_exception(server,
2236 _nfs4_proc_statfs(server, fhandle, fsstat),
2238 } while (exception.retry);
2242 static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
2243 struct nfs_fsinfo *fsinfo)
2245 struct nfs4_fsinfo_arg args = {
2247 .bitmask = server->attr_bitmask,
2249 struct rpc_message msg = {
2250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
2255 return rpc_call_sync(server->client, &msg, 0);
2258 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2260 struct nfs4_exception exception = { };
2264 err = nfs4_handle_exception(server,
2265 _nfs4_do_fsinfo(server, fhandle, fsinfo),
2267 } while (exception.retry);
2271 static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
2273 nfs_fattr_init(fsinfo->fattr);
2274 return nfs4_do_fsinfo(server, fhandle, fsinfo);
2277 static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2278 struct nfs_pathconf *pathconf)
2280 struct nfs4_pathconf_arg args = {
2282 .bitmask = server->attr_bitmask,
2284 struct rpc_message msg = {
2285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
2287 .rpc_resp = pathconf,
2290 /* None of the pathconf attributes are mandatory to implement */
2291 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
2292 memset(pathconf, 0, sizeof(*pathconf));
2296 nfs_fattr_init(pathconf->fattr);
2297 return rpc_call_sync(server->client, &msg, 0);
2300 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
2301 struct nfs_pathconf *pathconf)
2303 struct nfs4_exception exception = { };
2307 err = nfs4_handle_exception(server,
2308 _nfs4_proc_pathconf(server, fhandle, pathconf),
2310 } while (exception.retry);
2314 static void nfs4_read_done(struct rpc_task *task, void *calldata)
2316 struct nfs_read_data *data = calldata;
2317 struct inode *inode = data->inode;
2319 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2320 rpc_restart_call(task);
2323 if (task->tk_status > 0)
2324 renew_lease(NFS_SERVER(inode), data->timestamp);
2325 /* Call back common NFS readpage processing */
2326 nfs_readpage_result(task, calldata);
2329 static const struct rpc_call_ops nfs4_read_ops = {
2330 .rpc_call_done = nfs4_read_done,
2331 .rpc_release = nfs_readdata_release,
2335 nfs4_proc_read_setup(struct nfs_read_data *data)
2337 struct rpc_task *task = &data->task;
2338 struct rpc_message msg = {
2339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ],
2340 .rpc_argp = &data->args,
2341 .rpc_resp = &data->res,
2342 .rpc_cred = data->cred,
2344 struct inode *inode = data->inode;
2347 data->timestamp = jiffies;
2349 /* N.B. Do we need to test? Never called for swapfile inode */
2350 flags = RPC_TASK_ASYNC | (IS_SWAPFILE(inode)? NFS_RPC_SWAPFLAGS : 0);
2352 /* Finalize the task. */
2353 rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_read_ops, data);
2354 rpc_call_setup(task, &msg, 0);
2357 static void nfs4_write_done(struct rpc_task *task, void *calldata)
2359 struct nfs_write_data *data = calldata;
2360 struct inode *inode = data->inode;
2362 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2363 rpc_restart_call(task);
2366 if (task->tk_status >= 0) {
2367 renew_lease(NFS_SERVER(inode), data->timestamp);
2368 nfs_post_op_update_inode(inode, data->res.fattr);
2370 /* Call back common NFS writeback processing */
2371 nfs_writeback_done(task, calldata);
2374 static const struct rpc_call_ops nfs4_write_ops = {
2375 .rpc_call_done = nfs4_write_done,
2376 .rpc_release = nfs_writedata_release,
2380 nfs4_proc_write_setup(struct nfs_write_data *data, int how)
2382 struct rpc_task *task = &data->task;
2383 struct rpc_message msg = {
2384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE],
2385 .rpc_argp = &data->args,
2386 .rpc_resp = &data->res,
2387 .rpc_cred = data->cred,
2389 struct inode *inode = data->inode;
2390 struct nfs_server *server = NFS_SERVER(inode);
2394 if (how & FLUSH_STABLE) {
2395 if (!NFS_I(inode)->ncommit)
2396 stable = NFS_FILE_SYNC;
2398 stable = NFS_DATA_SYNC;
2400 stable = NFS_UNSTABLE;
2401 data->args.stable = stable;
2402 data->args.bitmask = server->attr_bitmask;
2403 data->res.server = server;
2405 data->timestamp = jiffies;
2407 /* Set the initial flags for the task. */
2408 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
2410 /* Finalize the task. */
2411 rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_write_ops, data);
2412 rpc_call_setup(task, &msg, 0);
2415 static void nfs4_commit_done(struct rpc_task *task, void *calldata)
2417 struct nfs_write_data *data = calldata;
2418 struct inode *inode = data->inode;
2420 if (nfs4_async_handle_error(task, NFS_SERVER(inode)) == -EAGAIN) {
2421 rpc_restart_call(task);
2424 if (task->tk_status >= 0)
2425 nfs_post_op_update_inode(inode, data->res.fattr);
2426 /* Call back common NFS writeback processing */
2427 nfs_commit_done(task, calldata);
2430 static const struct rpc_call_ops nfs4_commit_ops = {
2431 .rpc_call_done = nfs4_commit_done,
2432 .rpc_release = nfs_commit_release,
2436 nfs4_proc_commit_setup(struct nfs_write_data *data, int how)
2438 struct rpc_task *task = &data->task;
2439 struct rpc_message msg = {
2440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT],
2441 .rpc_argp = &data->args,
2442 .rpc_resp = &data->res,
2443 .rpc_cred = data->cred,
2445 struct inode *inode = data->inode;
2446 struct nfs_server *server = NFS_SERVER(inode);
2449 data->args.bitmask = server->attr_bitmask;
2450 data->res.server = server;
2452 /* Set the initial flags for the task. */
2453 flags = (how & FLUSH_SYNC) ? 0 : RPC_TASK_ASYNC;
2455 /* Finalize the task. */
2456 rpc_init_task(task, NFS_CLIENT(inode), flags, &nfs4_commit_ops, data);
2457 rpc_call_setup(task, &msg, 0);
2461 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2462 * standalone procedure for queueing an asynchronous RENEW.
2464 static void nfs4_renew_done(struct rpc_task *task, void *data)
2466 struct nfs4_client *clp = (struct nfs4_client *)task->tk_msg.rpc_argp;
2467 unsigned long timestamp = (unsigned long)data;
2469 if (task->tk_status < 0) {
2470 switch (task->tk_status) {
2471 case -NFS4ERR_STALE_CLIENTID:
2472 case -NFS4ERR_EXPIRED:
2473 case -NFS4ERR_CB_PATH_DOWN:
2474 nfs4_schedule_state_recovery(clp);
2478 spin_lock(&clp->cl_lock);
2479 if (time_before(clp->cl_last_renewal,timestamp))
2480 clp->cl_last_renewal = timestamp;
2481 spin_unlock(&clp->cl_lock);
2484 static const struct rpc_call_ops nfs4_renew_ops = {
2485 .rpc_call_done = nfs4_renew_done,
2489 nfs4_proc_async_renew(struct nfs4_client *clp)
2491 struct rpc_message msg = {
2492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2494 .rpc_cred = clp->cl_cred,
2497 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
2498 &nfs4_renew_ops, (void *)jiffies);
2502 nfs4_proc_renew(struct nfs4_client *clp)
2504 struct rpc_message msg = {
2505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
2507 .rpc_cred = clp->cl_cred,
2509 unsigned long now = jiffies;
2512 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2515 spin_lock(&clp->cl_lock);
2516 if (time_before(clp->cl_last_renewal,now))
2517 clp->cl_last_renewal = now;
2518 spin_unlock(&clp->cl_lock);
2522 static inline int nfs4_server_supports_acls(struct nfs_server *server)
2524 return (server->caps & NFS_CAP_ACLS)
2525 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
2526 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
2529 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2530 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2533 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2535 static void buf_to_pages(const void *buf, size_t buflen,
2536 struct page **pages, unsigned int *pgbase)
2538 const void *p = buf;
2540 *pgbase = offset_in_page(buf);
2542 while (p < buf + buflen) {
2543 *(pages++) = virt_to_page(p);
2544 p += PAGE_CACHE_SIZE;
2548 struct nfs4_cached_acl {
2554 static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
2556 struct nfs_inode *nfsi = NFS_I(inode);
2558 spin_lock(&inode->i_lock);
2559 kfree(nfsi->nfs4_acl);
2560 nfsi->nfs4_acl = acl;
2561 spin_unlock(&inode->i_lock);
2564 static void nfs4_zap_acl_attr(struct inode *inode)
2566 nfs4_set_cached_acl(inode, NULL);
2569 static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
2571 struct nfs_inode *nfsi = NFS_I(inode);
2572 struct nfs4_cached_acl *acl;
2575 spin_lock(&inode->i_lock);
2576 acl = nfsi->nfs4_acl;
2579 if (buf == NULL) /* user is just asking for length */
2581 if (acl->cached == 0)
2583 ret = -ERANGE; /* see getxattr(2) man page */
2584 if (acl->len > buflen)
2586 memcpy(buf, acl->data, acl->len);
2590 spin_unlock(&inode->i_lock);
2594 static void nfs4_write_cached_acl(struct inode *inode, const char *buf, size_t acl_len)
2596 struct nfs4_cached_acl *acl;
2598 if (buf && acl_len <= PAGE_SIZE) {
2599 acl = kmalloc(sizeof(*acl) + acl_len, GFP_KERNEL);
2603 memcpy(acl->data, buf, acl_len);
2605 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
2612 nfs4_set_cached_acl(inode, acl);
2615 static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
2617 struct page *pages[NFS4ACL_MAXPAGES];
2618 struct nfs_getaclargs args = {
2619 .fh = NFS_FH(inode),
2623 size_t resp_len = buflen;
2625 struct rpc_message msg = {
2626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
2628 .rpc_resp = &resp_len,
2630 struct page *localpage = NULL;
2633 if (buflen < PAGE_SIZE) {
2634 /* As long as we're doing a round trip to the server anyway,
2635 * let's be prepared for a page of acl data. */
2636 localpage = alloc_page(GFP_KERNEL);
2637 resp_buf = page_address(localpage);
2638 if (localpage == NULL)
2640 args.acl_pages[0] = localpage;
2641 args.acl_pgbase = 0;
2642 resp_len = args.acl_len = PAGE_SIZE;
2645 buf_to_pages(buf, buflen, args.acl_pages, &args.acl_pgbase);
2647 ret = rpc_call_sync(NFS_CLIENT(inode), &msg, 0);
2650 if (resp_len > args.acl_len)
2651 nfs4_write_cached_acl(inode, NULL, resp_len);
2653 nfs4_write_cached_acl(inode, resp_buf, resp_len);
2656 if (resp_len > buflen)
2659 memcpy(buf, resp_buf, resp_len);
2664 __free_page(localpage);
2668 static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
2670 struct nfs_server *server = NFS_SERVER(inode);
2673 if (!nfs4_server_supports_acls(server))
2675 ret = nfs_revalidate_inode(server, inode);
2678 ret = nfs4_read_cached_acl(inode, buf, buflen);
2681 return nfs4_get_acl_uncached(inode, buf, buflen);
2684 static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
2686 struct nfs_server *server = NFS_SERVER(inode);
2687 struct page *pages[NFS4ACL_MAXPAGES];
2688 struct nfs_setaclargs arg = {
2689 .fh = NFS_FH(inode),
2693 struct rpc_message msg = {
2694 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
2700 if (!nfs4_server_supports_acls(server))
2702 nfs_inode_return_delegation(inode);
2703 buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
2704 ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
2706 nfs4_write_cached_acl(inode, buf, buflen);
2711 nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
2713 struct nfs4_client *clp = server->nfs4_state;
2715 if (!clp || task->tk_status >= 0)
2717 switch(task->tk_status) {
2718 case -NFS4ERR_STALE_CLIENTID:
2719 case -NFS4ERR_STALE_STATEID:
2720 case -NFS4ERR_EXPIRED:
2721 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL, NULL);
2722 nfs4_schedule_state_recovery(clp);
2723 if (test_bit(NFS4CLNT_OK, &clp->cl_state))
2724 rpc_wake_up_task(task);
2725 task->tk_status = 0;
2727 case -NFS4ERR_GRACE:
2728 case -NFS4ERR_DELAY:
2729 rpc_delay(task, NFS4_POLL_RETRY_MAX);
2730 task->tk_status = 0;
2732 case -NFS4ERR_OLD_STATEID:
2733 task->tk_status = 0;
2736 task->tk_status = nfs4_map_errors(task->tk_status);
2740 static int nfs4_wait_clnt_recover(struct rpc_clnt *clnt, struct nfs4_client *clp)
2744 int interruptible, res = 0;
2748 rpc_clnt_sigmask(clnt, &oldset);
2749 interruptible = TASK_UNINTERRUPTIBLE;
2751 interruptible = TASK_INTERRUPTIBLE;
2752 prepare_to_wait(&clp->cl_waitq, &wait, interruptible);
2753 nfs4_schedule_state_recovery(clp);
2754 if (clnt->cl_intr && signalled())
2756 else if (!test_bit(NFS4CLNT_OK, &clp->cl_state))
2758 finish_wait(&clp->cl_waitq, &wait);
2759 rpc_clnt_sigunmask(clnt, &oldset);
2763 static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
2771 *timeout = NFS4_POLL_RETRY_MIN;
2772 if (*timeout > NFS4_POLL_RETRY_MAX)
2773 *timeout = NFS4_POLL_RETRY_MAX;
2774 rpc_clnt_sigmask(clnt, &oldset);
2775 if (clnt->cl_intr) {
2776 schedule_timeout_interruptible(*timeout);
2780 schedule_timeout_uninterruptible(*timeout);
2781 rpc_clnt_sigunmask(clnt, &oldset);
2786 /* This is the error handling routine for processes that are allowed
2789 int nfs4_handle_exception(const struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
2791 struct nfs4_client *clp = server->nfs4_state;
2792 int ret = errorcode;
2794 exception->retry = 0;
2798 case -NFS4ERR_STALE_CLIENTID:
2799 case -NFS4ERR_STALE_STATEID:
2800 case -NFS4ERR_EXPIRED:
2801 ret = nfs4_wait_clnt_recover(server->client, clp);
2803 exception->retry = 1;
2805 case -NFS4ERR_GRACE:
2806 case -NFS4ERR_DELAY:
2807 ret = nfs4_delay(server->client, &exception->timeout);
2810 case -NFS4ERR_OLD_STATEID:
2811 exception->retry = 1;
2813 /* We failed to handle the error */
2814 return nfs4_map_errors(ret);
2817 int nfs4_proc_setclientid(struct nfs4_client *clp, u32 program, unsigned short port)
2819 nfs4_verifier sc_verifier;
2820 struct nfs4_setclientid setclientid = {
2821 .sc_verifier = &sc_verifier,
2824 struct rpc_message msg = {
2825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
2826 .rpc_argp = &setclientid,
2828 .rpc_cred = clp->cl_cred,
2834 p = (u32*)sc_verifier.data;
2835 *p++ = htonl((u32)clp->cl_boot_time.tv_sec);
2836 *p = htonl((u32)clp->cl_boot_time.tv_nsec);
2839 setclientid.sc_name_len = scnprintf(setclientid.sc_name,
2840 sizeof(setclientid.sc_name), "%s/%u.%u.%u.%u %s %u",
2841 clp->cl_ipaddr, NIPQUAD(clp->cl_addr.s_addr),
2842 clp->cl_cred->cr_ops->cr_name,
2843 clp->cl_id_uniquifier);
2844 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
2845 sizeof(setclientid.sc_netid), "tcp");
2846 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
2847 sizeof(setclientid.sc_uaddr), "%s.%d.%d",
2848 clp->cl_ipaddr, port >> 8, port & 255);
2850 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2851 if (status != -NFS4ERR_CLID_INUSE)
2856 ssleep(clp->cl_lease_time + 1);
2858 if (++clp->cl_id_uniquifier == 0)
2865 nfs4_proc_setclientid_confirm(struct nfs4_client *clp)
2867 struct nfs_fsinfo fsinfo;
2868 struct rpc_message msg = {
2869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
2871 .rpc_resp = &fsinfo,
2872 .rpc_cred = clp->cl_cred,
2878 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
2880 spin_lock(&clp->cl_lock);
2881 clp->cl_lease_time = fsinfo.lease_time * HZ;
2882 clp->cl_last_renewal = now;
2883 spin_unlock(&clp->cl_lock);
2888 struct nfs4_delegreturndata {
2889 struct nfs4_delegreturnargs args;
2891 nfs4_stateid stateid;
2892 struct rpc_cred *cred;
2896 static void nfs4_delegreturn_prepare(struct rpc_task *task, void *calldata)
2898 struct nfs4_delegreturndata *data = calldata;
2899 struct rpc_message msg = {
2900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
2901 .rpc_argp = &data->args,
2902 .rpc_cred = data->cred,
2904 rpc_call_setup(task, &msg, 0);
2907 static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
2909 struct nfs4_delegreturndata *data = calldata;
2910 data->rpc_status = task->tk_status;
2913 static void nfs4_delegreturn_release(void *calldata)
2915 struct nfs4_delegreturndata *data = calldata;
2917 put_rpccred(data->cred);
2921 const static struct rpc_call_ops nfs4_delegreturn_ops = {
2922 .rpc_call_prepare = nfs4_delegreturn_prepare,
2923 .rpc_call_done = nfs4_delegreturn_done,
2924 .rpc_release = nfs4_delegreturn_release,
2927 static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2929 struct nfs4_delegreturndata *data;
2930 struct rpc_task *task;
2933 data = kmalloc(sizeof(*data), GFP_KERNEL);
2936 data->args.fhandle = &data->fh;
2937 data->args.stateid = &data->stateid;
2938 nfs_copy_fh(&data->fh, NFS_FH(inode));
2939 memcpy(&data->stateid, stateid, sizeof(data->stateid));
2940 data->cred = get_rpccred(cred);
2941 data->rpc_status = 0;
2943 task = rpc_run_task(NFS_CLIENT(inode), RPC_TASK_ASYNC, &nfs4_delegreturn_ops, data);
2945 nfs4_delegreturn_release(data);
2946 return PTR_ERR(task);
2948 status = nfs4_wait_for_completion_rpc_task(task);
2950 status = data->rpc_status;
2951 rpc_release_task(task);
2955 int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid)
2957 struct nfs_server *server = NFS_SERVER(inode);
2958 struct nfs4_exception exception = { };
2961 err = _nfs4_proc_delegreturn(inode, cred, stateid);
2963 case -NFS4ERR_STALE_STATEID:
2964 case -NFS4ERR_EXPIRED:
2965 nfs4_schedule_state_recovery(server->nfs4_state);
2969 err = nfs4_handle_exception(server, err, &exception);
2970 } while (exception.retry);
2974 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
2975 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
2978 * sleep, with exponential backoff, and retry the LOCK operation.
2980 static unsigned long
2981 nfs4_set_lock_task_retry(unsigned long timeout)
2983 schedule_timeout_interruptible(timeout);
2985 if (timeout > NFS4_LOCK_MAXTIMEOUT)
2986 return NFS4_LOCK_MAXTIMEOUT;
2990 static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
2992 struct inode *inode = state->inode;
2993 struct nfs_server *server = NFS_SERVER(inode);
2994 struct nfs4_client *clp = server->nfs4_state;
2995 struct nfs_lockt_args arg = {
2996 .fh = NFS_FH(inode),
2999 struct nfs_lockt_res res = {
3002 struct rpc_message msg = {
3003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
3006 .rpc_cred = state->owner->so_cred,
3008 struct nfs4_lock_state *lsp;
3011 down_read(&clp->cl_sem);
3012 arg.lock_owner.clientid = clp->cl_clientid;
3013 status = nfs4_set_lock_state(state, request);
3016 lsp = request->fl_u.nfs4_fl.owner;
3017 arg.lock_owner.id = lsp->ls_id;
3018 status = rpc_call_sync(server->client, &msg, 0);
3021 request->fl_type = F_UNLCK;
3023 case -NFS4ERR_DENIED:
3027 up_read(&clp->cl_sem);
3031 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3033 struct nfs4_exception exception = { };
3037 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3038 _nfs4_proc_getlk(state, cmd, request),
3040 } while (exception.retry);
3044 static int do_vfs_lock(struct file *file, struct file_lock *fl)
3047 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
3049 res = posix_lock_file_wait(file, fl);
3052 res = flock_lock_file_wait(file, fl);
3058 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n",
3063 struct nfs4_unlockdata {
3064 struct nfs_locku_args arg;
3065 struct nfs_locku_res res;
3066 struct nfs4_lock_state *lsp;
3067 struct nfs_open_context *ctx;
3068 struct file_lock fl;
3069 const struct nfs_server *server;
3072 static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
3073 struct nfs_open_context *ctx,
3074 struct nfs4_lock_state *lsp,
3075 struct nfs_seqid *seqid)
3077 struct nfs4_unlockdata *p;
3078 struct inode *inode = lsp->ls_state->inode;
3080 p = kmalloc(sizeof(*p), GFP_KERNEL);
3083 p->arg.fh = NFS_FH(inode);
3085 p->arg.seqid = seqid;
3086 p->arg.stateid = &lsp->ls_stateid;
3088 atomic_inc(&lsp->ls_count);
3089 /* Ensure we don't close file until we're done freeing locks! */
3090 p->ctx = get_nfs_open_context(ctx);
3091 memcpy(&p->fl, fl, sizeof(p->fl));
3092 p->server = NFS_SERVER(inode);
3096 static void nfs4_locku_release_calldata(void *data)
3098 struct nfs4_unlockdata *calldata = data;
3099 nfs_free_seqid(calldata->arg.seqid);
3100 nfs4_put_lock_state(calldata->lsp);
3101 put_nfs_open_context(calldata->ctx);
3105 static void nfs4_locku_done(struct rpc_task *task, void *data)
3107 struct nfs4_unlockdata *calldata = data;
3109 if (RPC_ASSASSINATED(task))
3111 nfs_increment_lock_seqid(task->tk_status, calldata->arg.seqid);
3112 switch (task->tk_status) {
3114 memcpy(calldata->lsp->ls_stateid.data,
3115 calldata->res.stateid.data,
3116 sizeof(calldata->lsp->ls_stateid.data));
3118 case -NFS4ERR_STALE_STATEID:
3119 case -NFS4ERR_EXPIRED:
3120 nfs4_schedule_state_recovery(calldata->server->nfs4_state);
3123 if (nfs4_async_handle_error(task, calldata->server) == -EAGAIN) {
3124 rpc_restart_call(task);
3129 static void nfs4_locku_prepare(struct rpc_task *task, void *data)
3131 struct nfs4_unlockdata *calldata = data;
3132 struct rpc_message msg = {
3133 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
3134 .rpc_argp = &calldata->arg,
3135 .rpc_resp = &calldata->res,
3136 .rpc_cred = calldata->lsp->ls_state->owner->so_cred,
3139 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
3141 if ((calldata->lsp->ls_flags & NFS_LOCK_INITIALIZED) == 0) {
3142 /* Note: exit _without_ running nfs4_locku_done */
3143 task->tk_action = NULL;
3146 rpc_call_setup(task, &msg, 0);
3149 static const struct rpc_call_ops nfs4_locku_ops = {
3150 .rpc_call_prepare = nfs4_locku_prepare,
3151 .rpc_call_done = nfs4_locku_done,
3152 .rpc_release = nfs4_locku_release_calldata,
3155 static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
3156 struct nfs_open_context *ctx,
3157 struct nfs4_lock_state *lsp,
3158 struct nfs_seqid *seqid)
3160 struct nfs4_unlockdata *data;
3161 struct rpc_task *task;
3163 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
3165 nfs_free_seqid(seqid);
3166 return ERR_PTR(-ENOMEM);
3169 /* Unlock _before_ we do the RPC call */
3170 do_vfs_lock(fl->fl_file, fl);
3171 task = rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
3173 nfs4_locku_release_calldata(data);
3177 static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
3179 struct nfs_seqid *seqid;
3180 struct nfs4_lock_state *lsp;
3181 struct rpc_task *task;
3184 /* Is this a delegated lock? */
3185 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3187 /* Is this open_owner holding any locks on the server? */
3188 if (test_bit(LK_STATE_IN_USE, &state->flags) == 0)
3191 status = nfs4_set_lock_state(state, request);
3194 lsp = request->fl_u.nfs4_fl.owner;
3196 seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3199 task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
3200 status = PTR_ERR(task);
3203 status = nfs4_wait_for_completion_rpc_task(task);
3204 rpc_release_task(task);
3207 do_vfs_lock(request->fl_file, request);
3211 struct nfs4_lockdata {
3212 struct nfs_lock_args arg;
3213 struct nfs_lock_res res;
3214 struct nfs4_lock_state *lsp;
3215 struct nfs_open_context *ctx;
3216 struct file_lock fl;
3221 static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
3222 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp)
3224 struct nfs4_lockdata *p;
3225 struct inode *inode = lsp->ls_state->inode;
3226 struct nfs_server *server = NFS_SERVER(inode);
3228 p = kzalloc(sizeof(*p), GFP_KERNEL);
3232 p->arg.fh = NFS_FH(inode);
3234 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid);
3235 if (p->arg.lock_seqid == NULL)
3237 p->arg.lock_stateid = &lsp->ls_stateid;
3238 p->arg.lock_owner.clientid = server->nfs4_state->cl_clientid;
3239 p->arg.lock_owner.id = lsp->ls_id;
3241 atomic_inc(&lsp->ls_count);
3242 p->ctx = get_nfs_open_context(ctx);
3243 memcpy(&p->fl, fl, sizeof(p->fl));
3250 static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
3252 struct nfs4_lockdata *data = calldata;
3253 struct nfs4_state *state = data->lsp->ls_state;
3254 struct nfs4_state_owner *sp = state->owner;
3255 struct rpc_message msg = {
3256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
3257 .rpc_argp = &data->arg,
3258 .rpc_resp = &data->res,
3259 .rpc_cred = sp->so_cred,
3262 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
3264 dprintk("%s: begin!\n", __FUNCTION__);
3265 /* Do we need to do an open_to_lock_owner? */
3266 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
3267 data->arg.open_seqid = nfs_alloc_seqid(&sp->so_seqid);
3268 if (data->arg.open_seqid == NULL) {
3269 data->rpc_status = -ENOMEM;
3270 task->tk_action = NULL;
3273 data->arg.open_stateid = &state->stateid;
3274 data->arg.new_lock_owner = 1;
3276 rpc_call_setup(task, &msg, 0);
3278 dprintk("%s: done!, ret = %d\n", __FUNCTION__, data->rpc_status);
3281 static void nfs4_lock_done(struct rpc_task *task, void *calldata)
3283 struct nfs4_lockdata *data = calldata;
3285 dprintk("%s: begin!\n", __FUNCTION__);
3287 data->rpc_status = task->tk_status;
3288 if (RPC_ASSASSINATED(task))
3290 if (data->arg.new_lock_owner != 0) {
3291 nfs_increment_open_seqid(data->rpc_status, data->arg.open_seqid);
3292 if (data->rpc_status == 0)
3293 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
3297 if (data->rpc_status == 0) {
3298 memcpy(data->lsp->ls_stateid.data, data->res.stateid.data,
3299 sizeof(data->lsp->ls_stateid.data));
3300 data->lsp->ls_flags |= NFS_LOCK_INITIALIZED;
3302 nfs_increment_lock_seqid(data->rpc_status, data->arg.lock_seqid);
3304 dprintk("%s: done, ret = %d!\n", __FUNCTION__, data->rpc_status);
3307 static void nfs4_lock_release(void *calldata)
3309 struct nfs4_lockdata *data = calldata;
3311 dprintk("%s: begin!\n", __FUNCTION__);
3312 if (data->arg.open_seqid != NULL)
3313 nfs_free_seqid(data->arg.open_seqid);
3314 if (data->cancelled != 0) {
3315 struct rpc_task *task;
3316 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
3317 data->arg.lock_seqid);
3319 rpc_release_task(task);
3320 dprintk("%s: cancelling lock!\n", __FUNCTION__);
3322 nfs_free_seqid(data->arg.lock_seqid);
3323 nfs4_put_lock_state(data->lsp);
3324 put_nfs_open_context(data->ctx);
3326 dprintk("%s: done!\n", __FUNCTION__);
3329 static const struct rpc_call_ops nfs4_lock_ops = {
3330 .rpc_call_prepare = nfs4_lock_prepare,
3331 .rpc_call_done = nfs4_lock_done,
3332 .rpc_release = nfs4_lock_release,
3335 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int reclaim)
3337 struct nfs4_lockdata *data;
3338 struct rpc_task *task;
3341 dprintk("%s: begin!\n", __FUNCTION__);
3342 data = nfs4_alloc_lockdata(fl, fl->fl_file->private_data,
3343 fl->fl_u.nfs4_fl.owner);
3347 data->arg.block = 1;
3349 data->arg.reclaim = 1;
3350 task = rpc_run_task(NFS_CLIENT(state->inode), RPC_TASK_ASYNC,
3351 &nfs4_lock_ops, data);
3353 nfs4_lock_release(data);
3354 return PTR_ERR(task);
3356 ret = nfs4_wait_for_completion_rpc_task(task);
3358 ret = data->rpc_status;
3359 if (ret == -NFS4ERR_DENIED)
3362 data->cancelled = 1;
3363 rpc_release_task(task);
3364 dprintk("%s: done, ret = %d!\n", __FUNCTION__, ret);
3368 static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
3370 struct nfs_server *server = NFS_SERVER(state->inode);
3371 struct nfs4_exception exception = { };
3374 /* Cache the lock if possible... */
3375 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
3378 err = _nfs4_do_setlk(state, F_SETLK, request, 1);
3379 if (err != -NFS4ERR_DELAY)
3381 nfs4_handle_exception(server, err, &exception);
3382 } while (exception.retry);
3386 static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
3388 struct nfs_server *server = NFS_SERVER(state->inode);
3389 struct nfs4_exception exception = { };
3392 err = nfs4_set_lock_state(state, request);
3396 err = _nfs4_do_setlk(state, F_SETLK, request, 0);
3397 if (err != -NFS4ERR_DELAY)
3399 nfs4_handle_exception(server, err, &exception);
3400 } while (exception.retry);
3404 static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3406 struct nfs4_client *clp = state->owner->so_client;
3409 /* Is this a delegated open? */
3410 if (NFS_I(state->inode)->delegation_state != 0) {
3411 /* Yes: cache locks! */
3412 status = do_vfs_lock(request->fl_file, request);
3413 /* ...but avoid races with delegation recall... */
3414 if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags))
3417 down_read(&clp->cl_sem);
3418 status = nfs4_set_lock_state(state, request);
3421 status = _nfs4_do_setlk(state, cmd, request, 0);
3424 /* Note: we always want to sleep here! */
3425 request->fl_flags |= FL_SLEEP;
3426 if (do_vfs_lock(request->fl_file, request) < 0)
3427 printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
3429 up_read(&clp->cl_sem);
3433 static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
3435 struct nfs4_exception exception = { };
3439 err = nfs4_handle_exception(NFS_SERVER(state->inode),
3440 _nfs4_proc_setlk(state, cmd, request),
3442 } while (exception.retry);
3447 nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
3449 struct nfs_open_context *ctx;
3450 struct nfs4_state *state;
3451 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
3454 /* verify open state */
3455 ctx = (struct nfs_open_context *)filp->private_data;
3458 if (request->fl_start < 0 || request->fl_end < 0)
3462 return nfs4_proc_getlk(state, F_GETLK, request);
3464 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
3467 if (request->fl_type == F_UNLCK)
3468 return nfs4_proc_unlck(state, cmd, request);
3471 status = nfs4_proc_setlk(state, cmd, request);
3472 if ((status != -EAGAIN) || IS_SETLK(cmd))
3474 timeout = nfs4_set_lock_task_retry(timeout);
3475 status = -ERESTARTSYS;
3478 } while(status < 0);
3482 int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
3484 struct nfs_server *server = NFS_SERVER(state->inode);
3485 struct nfs4_exception exception = { };
3488 err = nfs4_set_lock_state(state, fl);
3492 err = _nfs4_do_setlk(state, F_SETLK, fl, 0);
3493 if (err != -NFS4ERR_DELAY)
3495 err = nfs4_handle_exception(server, err, &exception);
3496 } while (exception.retry);
3501 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3503 int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
3504 size_t buflen, int flags)
3506 struct inode *inode = dentry->d_inode;
3508 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3511 if (!S_ISREG(inode->i_mode) &&
3512 (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
3515 return nfs4_proc_set_acl(inode, buf, buflen);
3518 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3519 * and that's what we'll do for e.g. user attributes that haven't been set.
3520 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3521 * attributes in kernel-managed attribute namespaces. */
3522 ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
3525 struct inode *inode = dentry->d_inode;
3527 if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
3530 return nfs4_proc_get_acl(inode, buf, buflen);
3533 ssize_t nfs4_listxattr(struct dentry *dentry, char *buf, size_t buflen)
3535 size_t len = strlen(XATTR_NAME_NFSV4_ACL) + 1;
3537 if (buf && buflen < len)
3540 memcpy(buf, XATTR_NAME_NFSV4_ACL, len);
3544 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops = {
3545 .recover_open = nfs4_open_reclaim,
3546 .recover_lock = nfs4_lock_reclaim,
3549 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops = {
3550 .recover_open = nfs4_open_expired,
3551 .recover_lock = nfs4_lock_expired,
3554 static struct inode_operations nfs4_file_inode_operations = {
3555 .permission = nfs_permission,
3556 .getattr = nfs_getattr,
3557 .setattr = nfs_setattr,
3558 .getxattr = nfs4_getxattr,
3559 .setxattr = nfs4_setxattr,
3560 .listxattr = nfs4_listxattr,
3563 struct nfs_rpc_ops nfs_v4_clientops = {
3564 .version = 4, /* protocol version */
3565 .dentry_ops = &nfs4_dentry_operations,
3566 .dir_inode_ops = &nfs4_dir_inode_operations,
3567 .file_inode_ops = &nfs4_file_inode_operations,
3568 .getroot = nfs4_proc_get_root,
3569 .getattr = nfs4_proc_getattr,
3570 .setattr = nfs4_proc_setattr,
3571 .lookup = nfs4_proc_lookup,
3572 .access = nfs4_proc_access,
3573 .readlink = nfs4_proc_readlink,
3574 .read = nfs4_proc_read,
3575 .write = nfs4_proc_write,
3576 .commit = nfs4_proc_commit,
3577 .create = nfs4_proc_create,
3578 .remove = nfs4_proc_remove,
3579 .unlink_setup = nfs4_proc_unlink_setup,
3580 .unlink_done = nfs4_proc_unlink_done,
3581 .rename = nfs4_proc_rename,
3582 .link = nfs4_proc_link,
3583 .symlink = nfs4_proc_symlink,
3584 .mkdir = nfs4_proc_mkdir,
3585 .rmdir = nfs4_proc_remove,
3586 .readdir = nfs4_proc_readdir,
3587 .mknod = nfs4_proc_mknod,
3588 .statfs = nfs4_proc_statfs,
3589 .fsinfo = nfs4_proc_fsinfo,
3590 .pathconf = nfs4_proc_pathconf,
3591 .decode_dirent = nfs4_decode_dirent,
3592 .read_setup = nfs4_proc_read_setup,
3593 .write_setup = nfs4_proc_write_setup,
3594 .commit_setup = nfs4_proc_commit_setup,
3595 .file_open = nfs_open,
3596 .file_release = nfs_release,
3597 .lock = nfs4_proc_lock,
3598 .clear_acl_cache = nfs4_zap_acl_attr,