[ 56/63] ext4: fix online resizing for ext3-compat file systems

From: Greg Kroah-Hartman
Date: Mon May 06 2013 - 19:49:12 EST


3.4-stable review patch. If anyone has any objections, please let me know.

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

From: Theodore Ts'o <tytso@xxxxxxx>

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@xxxxxxxxxx>
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
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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