From: Liu Bo Date: Sun, 6 Jan 2013 03:38:22 +0000 (+0000) Subject: Btrfs: use right range to find checksum for compressed extents X-Git-Tag: v3.8-rc5~1^2~5 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=192000dda22e02225772e862b92e7c09e5a17d08;p=platform%2Fkernel%2Flinux-exynos.git Btrfs: use right range to find checksum for compressed extents For compressed extents, the range of checksum is covered by disk length, and the disk length is different with ram length, so we need to use disk length instead to get us the right checksum. Signed-off-by: Liu Bo Signed-off-by: Josef Bacik --- diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index de8899b04d69..9027bb1e7466 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -3357,6 +3357,11 @@ static int log_one_extent(struct btrfs_trans_handle *trans, if (skip_csum) return 0; + if (em->compress_type) { + csum_offset = 0; + csum_len = block_len; + } + /* block start is already adjusted for the file extent offset. */ ret = btrfs_lookup_csums_range(log->fs_info->csum_root, em->block_start + csum_offset,