ext4: fix online resizing for ext3-compat file systems
Theodore Ts'o [Mon, 22 Apr 2013 00:19:43 +0000 (20:19 -0400)]
commit c5c72d814cf0f650010337c73638b25e6d14d2d4 upstream.

Commit fb0a387dcdc restricts block allocations for indirect-mapped
files to block groups less than s_blockfile_groups.  However, the
online resizing code wasn't setting s_blockfile_groups, so the newly
added block groups were not available for non-extent mapped files.

Reported-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

fs/ext4/resize.c

index 3fc0e8b..9202b22 100644 (file)
@@ -1202,6 +1202,8 @@ static void ext4_update_super(struct super_block *sb,
 
        /* Update the global fs size fields */
        sbi->s_groups_count += flex_gd->count;
+       sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count,
+                       (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb)));
 
        /* Update the reserved block counts only once the new group is
         * active. */