Btrfs: Add support for mirroring across drives
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 67d533c..0a20786 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -418,6 +418,7 @@
#define BTRFS_BLOCK_GROUP_SYSTEM (1 << 1)
#define BTRFS_BLOCK_GROUP_METADATA (1 << 2)
#define BTRFS_BLOCK_GROUP_RAID0 (1 << 3)
+#define BTRFS_BLOCK_GROUP_RAID1 (1 << 4)
struct btrfs_block_group_item {
@@ -504,8 +505,12 @@
u64 delalloc_bytes;
u64 last_alloc;
u64 last_data_alloc;
- int extra_data_alloc_bits;
- int extra_alloc_bits;
+ int avail_data_alloc_bits;
+ int avail_metadata_alloc_bits;
+ int avail_system_alloc_bits;
+ int data_alloc_profile;
+ int metadata_alloc_profile;
+ int system_alloc_profile;
};
/*