From b493968096944a11422c4d80fb87af537ca1cac7 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Mon, 3 Dec 2012 10:31:19 -0500 Subject: Btrfs: keep track of the extents original block length If we've written to a prealloc extent we need to know the original block len for the extent. We can't figure this out currently since ->block_len is just set to the extent length. So introduce ->orig_block_len so that we know how many bytes were in the original extent for proper extent logging that future patches will need. Thanks, Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- fs/btrfs/file.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'fs/btrfs/file.c') diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 7f4654a1520..6810145f4e9 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -588,6 +588,8 @@ void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, split->block_len = em->block_len; else split->block_len = split->len; + split->orig_block_len = max(split->block_len, + em->orig_block_len); split->generation = gen; split->bdev = em->bdev; split->flags = flags; @@ -609,6 +611,8 @@ void btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end, split->flags = flags; split->compress_type = em->compress_type; split->generation = gen; + split->orig_block_len = max(em->block_len, + em->orig_block_len); if (compressed) { split->block_len = em->block_len; @@ -1838,6 +1842,7 @@ out: hole_em->block_start = EXTENT_MAP_HOLE; hole_em->block_len = 0; + hole_em->orig_block_len = 0; hole_em->bdev = root->fs_info->fs_devices->latest_bdev; hole_em->compress_type = BTRFS_COMPRESS_NONE; hole_em->generation = trans->transid; -- cgit v1.2.3-18-g5258