AFFS does not ever wait for superblock synchronization in
->put_super(), ->write_super, and ->sync_fs().
However, it should wait for synchronization in ->put_super() because
it is about to be unmounted, in ->write_super() because this is
periodic SB synchronization performed from a separate kernel thread,
and in ->sync_fs() it should respect the 'wait' flag. This patch fixes
the situation.
Also, in ->put_super(), do not write the SB if it is not dirty.
Tested-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
static int affs_remount (struct super_block *sb, int *flags, char *data);
static void
static int affs_remount (struct super_block *sb, int *flags, char *data);
static void
-affs_commit_super(struct super_block *sb, int clean)
+affs_commit_super(struct super_block *sb, int wait, int clean)
{
struct affs_sb_info *sbi = AFFS_SB(sb);
struct buffer_head *bh = sbi->s_root_bh;
{
struct affs_sb_info *sbi = AFFS_SB(sb);
struct buffer_head *bh = sbi->s_root_bh;
secs_to_datestamp(get_seconds(), &tail->disk_change);
affs_fix_checksum(sb, bh);
mark_buffer_dirty(bh);
secs_to_datestamp(get_seconds(), &tail->disk_change);
affs_fix_checksum(sb, bh);
mark_buffer_dirty(bh);
+ if (wait)
+ sync_dirty_buffer(bh);
- if (!(sb->s_flags & MS_RDONLY))
- affs_commit_super(sb, 1);
+ if (!(sb->s_flags & MS_RDONLY) && sb->s_dirt)
+ affs_commit_super(sb, 1, 1);
kfree(sbi->s_prefix);
affs_free_bitmap(sb);
kfree(sbi->s_prefix);
affs_free_bitmap(sb);
{
lock_super(sb);
if (!(sb->s_flags & MS_RDONLY))
{
lock_super(sb);
if (!(sb->s_flags & MS_RDONLY))
- affs_commit_super(sb, 2);
+ affs_commit_super(sb, 1, 2);
sb->s_dirt = 0;
unlock_super(sb);
sb->s_dirt = 0;
unlock_super(sb);
affs_sync_fs(struct super_block *sb, int wait)
{
lock_super(sb);
affs_sync_fs(struct super_block *sb, int wait)
{
lock_super(sb);
- affs_commit_super(sb, 2);
+ affs_commit_super(sb, wait, 2);
sb->s_dirt = 0;
unlock_super(sb);
return 0;
sb->s_dirt = 0;
unlock_super(sb);
return 0;