nfs: use check_submounts_and_drop()
Do have_submounts(), shrink_dcache_parent() and d_drop() atomically.
check_submounts_and_drop() can deal with negative dentries and
non-directories as well.
Non-directories can also be mounted on. And just like directories we don't
want these to disappear with invalidation.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
CC: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index e474ca2b..7468735 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1135,14 +1135,13 @@
if (inode && S_ISDIR(inode->i_mode)) {
/* Purge readdir caches. */
nfs_zap_caches(inode);
- /* If we have submounts, don't unhash ! */
- if (have_submounts(dentry))
- goto out_valid;
if (dentry->d_flags & DCACHE_DISCONNECTED)
goto out_valid;
- shrink_dcache_parent(dentry);
}
- d_drop(dentry);
+ /* If we have submounts, don't unhash ! */
+ if (check_submounts_and_drop(dentry) != 0)
+ goto out_valid;
+
dput(parent);
dfprintk(LOOKUPCACHE, "NFS: %s(%s/%s) is invalid\n",
__func__, dentry->d_parent->d_name.name,