cifs: improve handlecaching

Only track the dentry for the root handle

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

diff --git a/fs/cifs/cached_dir.c b/fs/cifs/cached_dir.c
index 88d117ddb63086f07c3c115418a6559b6fa9ffd2..211f630cd8760d5f390177b2f6d309a4bfaaa913 100644 (file)
--- a/fs/cifs/cached_dir.c
+++ b/fs/cifs/cached_dir.c
@@ -47,11 +47,11 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
        if (cifs_sb->root == NULL)
                return -ENOENT;
 
-       if (strlen(path))
+       if (!path[0])
+               dentry = cifs_sb->root;
+       else
                return -ENOENT;
 
-       dentry = cifs_sb->root;
-
        cfid = &tcon->cfids->cfid;
        mutex_lock(&cfid->fid_mutex);
        if (cfid->is_valid) {
@@ -177,7 +177,8 @@ int open_cached_dir(unsigned int xid, struct cifs_tcon *tcon,
        cfid->tcon = tcon;
        cfid->is_valid = true;
        cfid->dentry = dentry;
-       dget(dentry);
+       if (dentry)
+               dget(dentry);
        kref_init(&cfid->refcount);
 
        /* BB TBD check to see if oplock level check can be removed below */