From 5af78b437cd390adad4ad2fb5e055c14d50e8efd Mon Sep 17 00:00:00 2001
From: Steve French <stfrench@microsoft.com>
Date: Wed, 10 May 2023 17:42:21 -0500
Subject: [PATCH] cifs: release leases for deferred close handles when freezing
commit d39fc592ef8ae9a89c5e85c8d9f760937a57d5ba upstream.
We should not be caching closed files when freeze is invoked on an fs
(so we can release resources more gracefully).
Fixes xfstests generic/068 generic/390 generic/491
Reviewed-by: David Howells <dhowells@redhat.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/cifs/cifsfs.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 26f87437b2dd..1820f8406978 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -730,6 +730,20 @@ static void cifs_umount_begin(struct super_block *sb)
return;
}
+static int cifs_freeze(struct super_block *sb)
+{
+ struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
+ struct cifs_tcon *tcon;
+
+ if (cifs_sb == NULL)
+ return 0;
+
+ tcon = cifs_sb_master_tcon(cifs_sb);
+
+ cifs_close_all_deferred_files(tcon);
+ return 0;
+}
+
#ifdef CONFIG_CIFS_STATS2
static int cifs_show_stats(struct seq_file *s, struct dentry *root)
{
@@ -761,6 +775,7 @@ static const struct super_operations cifs_super_ops = {
as opens */
.show_options = cifs_show_options,
.umount_begin = cifs_umount_begin,
+ .freeze_fs = cifs_freeze,
#ifdef CONFIG_CIFS_STATS2
.show_stats = cifs_show_stats,
#endif