The patch titled
ext4: fix online resize bug
has been added to the -mm tree. Its filename is
ext4-fix-online-resize-bug.patch
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------------------------------------------------------
Subject: ext4: fix online resize bug
From: Josef Bacik <jbacik@xxxxxxxxxx>
There is a bug when we are trying to verify that the reserve inode's
double indirect blocks point back to the primary gdt blocks. The fix is
obvious, we need to mod the gdb count by the addr's per block. This was
verified using the same testcase as with the ext3 equivalent of this
patch.
Signed-off-by: Josef Bacik <jbacik@xxxxxxxxxx>
Cc: <linux-ext4@xxxxxxxxxxxxxxx>
Cc: Andreas Dilger <adilger@xxxxxxx>
Cc: Mingming Cao <cmm@xxxxxxxxxx>
Cc: Theodore Ts'o <tytso@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ext4/resize.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN fs/ext4/resize.c~ext4-fix-online-resize-bug fs/ext4/resize.c
--- a/fs/ext4/resize.c~ext4-fix-online-resize-bug
+++ a/fs/ext4/resize.c
@@ -563,7 +563,8 @@ static int reserve_backup_gdb(handle_t *
}
blk = EXT4_SB(sb)->s_sbh->b_blocknr + 1 + EXT4_SB(sb)->s_gdb_count;
- data = (__le32 *)dind->b_data + EXT4_SB(sb)->s_gdb_count;
+ data = (__le32 *)dind->b_data + (EXT4_SB(sb)->s_gdb_count %
+ EXT4_ADDR_PER_BLOCK(sb));
end = (__le32 *)dind->b_data + EXT4_ADDR_PER_BLOCK(sb);
/* Get each reserved primary GDT block and verify it holds backups */
_
Patches currently in -mm which might be from jbacik@xxxxxxxxxx are
ext3-fix-online-resize-bug.patch
ext4-fix-online-resize-bug.patch
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