aboutsummaryrefslogtreecommitdiff
path: root/fs/nfs/nfs4proc.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/nfs/nfs4proc.c')
-rw-r--r--fs/nfs/nfs4proc.c103
1 files changed, 68 insertions, 35 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index b4916b09219..153898e1331 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2668,7 +2668,7 @@ out:
nfs4_set_cached_acl(inode, acl);
}
-static inline ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
+static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
{
struct page *pages[NFS4ACL_MAXPAGES];
struct nfs_getaclargs args = {
@@ -2721,6 +2721,19 @@ out_free:
return ret;
}
+static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
+{
+ struct nfs4_exception exception = { };
+ ssize_t ret;
+ do {
+ ret = __nfs4_get_acl_uncached(inode, buf, buflen);
+ if (ret >= 0)
+ break;
+ ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
+ } while (exception.retry);
+ return ret;
+}
+
static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
{
struct nfs_server *server = NFS_SERVER(inode);
@@ -2737,7 +2750,7 @@ static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
return nfs4_get_acl_uncached(inode, buf, buflen);
}
-static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
+static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
{
struct nfs_server *server = NFS_SERVER(inode);
struct page *pages[NFS4ACL_MAXPAGES];
@@ -2763,6 +2776,18 @@ static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen
return ret;
}
+static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
+{
+ struct nfs4_exception exception = { };
+ int err;
+ do {
+ err = nfs4_handle_exception(NFS_SERVER(inode),
+ __nfs4_proc_set_acl(inode, buf, buflen),
+ &exception);
+ } while (exception.retry);
+ return err;
+}
+
static int
nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server)
{
@@ -3144,9 +3169,6 @@ static int do_vfs_lock(struct file *file, struct file_lock *fl)
default:
BUG();
}
- if (res < 0)
- printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n",
- __FUNCTION__);
return res;
}
@@ -3258,8 +3280,6 @@ static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
return ERR_PTR(-ENOMEM);
}
- /* Unlock _before_ we do the RPC call */
- do_vfs_lock(fl->fl_file, fl);
return rpc_run_task(NFS_CLIENT(lsp->ls_state->inode), RPC_TASK_ASYNC, &nfs4_locku_ops, data);
}
@@ -3270,30 +3290,28 @@ static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *
struct rpc_task *task;
int status = 0;
- /* Is this a delegated lock? */
- if (test_bit(NFS_DELEGATED_STATE, &state->flags))
- goto out_unlock;
- /* Is this open_owner holding any locks on the server? */
- if (test_bit(LK_STATE_IN_USE, &state->flags) == 0)
- goto out_unlock;
-
status = nfs4_set_lock_state(state, request);
+ /* Unlock _before_ we do the RPC call */
+ request->fl_flags |= FL_EXISTS;
+ if (do_vfs_lock(request->fl_file, request) == -ENOENT)
+ goto out;
if (status != 0)
- goto out_unlock;
+ goto out;
+ /* Is this a delegated lock? */
+ if (test_bit(NFS_DELEGATED_STATE, &state->flags))
+ goto out;
lsp = request->fl_u.nfs4_fl.owner;
- status = -ENOMEM;
seqid = nfs_alloc_seqid(&lsp->ls_seqid);
+ status = -ENOMEM;
if (seqid == NULL)
- goto out_unlock;
+ goto out;
task = nfs4_do_unlck(request, request->fl_file->private_data, lsp, seqid);
status = PTR_ERR(task);
if (IS_ERR(task))
- goto out_unlock;
+ goto out;
status = nfs4_wait_for_completion_rpc_task(task);
rpc_release_task(task);
- return status;
-out_unlock:
- do_vfs_lock(request->fl_file, request);
+out:
return status;
}
@@ -3461,10 +3479,10 @@ static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request
struct nfs4_exception exception = { };
int err;
- /* Cache the lock if possible... */
- if (test_bit(NFS_DELEGATED_STATE, &state->flags))
- return 0;
do {
+ /* Cache the lock if possible... */
+ if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
+ return 0;
err = _nfs4_do_setlk(state, F_SETLK, request, 1);
if (err != -NFS4ERR_DELAY)
break;
@@ -3483,6 +3501,8 @@ static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request
if (err != 0)
return err;
do {
+ if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
+ return 0;
err = _nfs4_do_setlk(state, F_SETLK, request, 0);
if (err != -NFS4ERR_DELAY)
break;
@@ -3494,29 +3514,42 @@ static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request
static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
{
struct nfs4_client *clp = state->owner->so_client;
+ unsigned char fl_flags = request->fl_flags;
int status;
/* Is this a delegated open? */
- if (NFS_I(state->inode)->delegation_state != 0) {
- /* Yes: cache locks! */
- status = do_vfs_lock(request->fl_file, request);
- /* ...but avoid races with delegation recall... */
- if (status < 0 || test_bit(NFS_DELEGATED_STATE, &state->flags))
- return status;
- }
- down_read(&clp->cl_sem);
status = nfs4_set_lock_state(state, request);
if (status != 0)
goto out;
+ request->fl_flags |= FL_ACCESS;
+ status = do_vfs_lock(request->fl_file, request);
+ if (status < 0)
+ goto out;
+ down_read(&clp->cl_sem);
+ if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
+ struct nfs_inode *nfsi = NFS_I(state->inode);
+ /* Yes: cache locks! */
+ down_read(&nfsi->rwsem);
+ /* ...but avoid races with delegation recall... */
+ if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
+ request->fl_flags = fl_flags & ~FL_SLEEP;
+ status = do_vfs_lock(request->fl_file, request);
+ up_read(&nfsi->rwsem);
+ goto out_unlock;
+ }
+ up_read(&nfsi->rwsem);
+ }
status = _nfs4_do_setlk(state, cmd, request, 0);
if (status != 0)
- goto out;
+ goto out_unlock;
/* Note: we always want to sleep here! */
- request->fl_flags |= FL_SLEEP;
+ request->fl_flags = fl_flags | FL_SLEEP;
if (do_vfs_lock(request->fl_file, request) < 0)
printk(KERN_WARNING "%s: VFS is out of sync with lock manager!\n", __FUNCTION__);
-out:
+out_unlock:
up_read(&clp->cl_sem);
+out:
+ request->fl_flags = fl_flags;
return status;
}