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

Steven Rostedt
2013-05-18T03:04:55Z

[-- Attachment #1: 0077-ext4-fix-online-resizing-for-ext3-compat-file-system.patch --]
[-- Type: text/plain, Size: 1223 bytes --]

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

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

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

[ 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@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@vger.kernel.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
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