From: Ronnie Sahlberg <lsahlber@redhat.com>
Date: Wed, 31 Aug 2022 12:49:43 +1000
Subject: [PATCH] cifs: improve handlecaching
Git-commit: 47fc2491e108f253cf963c50acc59a74d34c7f2b
References: bsc#1193629
Patch-mainline: v6.1-rc1
Only track the dentry for the root handle
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Acked-by: Paulo Alcantara <palcantara@suse.de>
---
fs/cifs/cached_dir.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/fs/cifs/cached_dir.c b/fs/cifs/cached_dir.c
index 88d117ddb630..211f630cd876 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 */
--
2.38.0