[ 077/136 ] ext4: fix online resizing for ext3-compat file systems

[Steven Rostedt]

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

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

From: Theodore Ts'o <tytso@xxxxxxx>

[ Upstream commit c5c72d814cf0f650010337c73638b25e6d14d2d4 ]

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>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 fs/ext4/resize.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 82e1fde3..14de511 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -1255,6 +1255,8 @@ 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. */
-- 
1.7.10.4


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