btrfsck: add early code to handle corrupted block groups

This is mostly disabled, but it is step one in handling
corrupted block groups in the extent allocation tree.

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 13 insertions, 0 deletions

diff --git a/volumes.h b/volumes.h
index d7fcef66..9ff6182e 100644
--- a/volumes.h
+++ b/volumes.h
@@ -18,6 +18,7 @@
 
 #ifndef __BTRFS_VOLUMES_
 #define __BTRFS_VOLUMES_
+
 struct btrfs_device {
 	struct list_head dev_list;
 	struct btrfs_root *dev_root;
@@ -88,6 +89,18 @@ struct btrfs_multi_bio {
 	struct btrfs_bio_stripe stripes[];
 };
 
+struct map_lookup {
+	struct cache_extent ce;
+	u64 type;
+	int io_align;
+	int io_width;
+	int stripe_len;
+	int sector_size;
+	int num_stripes;
+	int sub_stripes;
+	struct btrfs_bio_stripe stripes[];
+};
+
 #define btrfs_multi_bio_size(n) (sizeof(struct btrfs_multi_bio) + \
 			    (sizeof(struct btrfs_bio_stripe) * (n)))