| Message ID | 1395330878-5636-1-git-send-email-kamal@canonical.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index d2c12df..d7f6b63 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -404,7 +404,7 @@ static int set_flexbg_block_bitmap(struct super_block *sb, handle_t *handle, start = ext4_group_first_block_no(sb, group); group -= flex_gd->groups[0].group; - count2 = sb->s_blocksize * 8 - (block - start); + count2 = EXT4_BLOCKS_PER_GROUP(sb) - (block - start); if (count2 > count) count2 = count;
This is a note to let you know that I have just added a patch titled ext4: fix online resize with a non-standard blocks per group setting to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y-queue This patch is scheduled to be released in version 3.8.13.20. If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.8.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Kamal ------ From e983b519c97f6875ff8295697dd67e6f4b84db92 Mon Sep 17 00:00:00 2001 From: Theodore Ts'o <tytso@mit.edu> Date: Sat, 15 Feb 2014 22:42:25 -0500 Subject: ext4: fix online resize with a non-standard blocks per group setting commit 3d2660d0c9c2f296837078c189b68a47f6b2e3b5 upstream. The set_flexbg_block_bitmap() function assumed that the number of blocks in a blockgroup was sb->blocksize * 8, which is normally true, but not always! Use EXT4_BLOCKS_PER_GROUP(sb) instead, to fix block bitmap corruption after: mke2fs -t ext4 -g 3072 -i 4096 /dev/vdd 1G mount -t ext4 /dev/vdd /vdd resize2fs /dev/vdd 8G Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reported-by: Jon Bernard <jbernard@tuxion.com> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- fs/ext4/resize.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) -- 1.8.3.2