From: Steve French stfrench@microsoft.com
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(+)
--- a/fs/cifs/cifsfs.c +++ b/fs/cifs/cifsfs.c @@ -759,6 +759,20 @@ static void cifs_umount_begin(struct sup 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) { @@ -797,6 +811,7 @@ static const struct super_operations cif 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