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    Subject[ 56/63] ext4: fix online resizing for ext3-compat file systems
    Date
    3.4-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Theodore Ts'o <tytso@mit.edu>

    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 | 2 ++
    1 file changed, 2 insertions(+)

    --- a/fs/ext4/resize.c
    +++ b/fs/ext4/resize.c
    @@ -1202,6 +1202,8 @@ static void ext4_update_super(struct sup

    /* 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. */



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