From: Ronnie Sahlberg <lsahlber@redhat.com>
Date: Wed, 31 Aug 2022 02:49:43 +0000 (+1000)
Subject: cifs: improve handlecaching
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=47fc2491e108f253cf963c50acc59a74d34c7f2b;p=linux.git

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 88d117ddb6308..211f630cd8760 100644
--- 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 */