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authorIlya Dryomov <idryomov@gmail.com>2012-03-27 17:09:17 +0300
committerIlya Dryomov <idryomov@gmail.com>2012-03-27 17:09:17 +0300
commit7738a53a3a3aa8d82350280ff4bc7df9c3094123 (patch)
treef51ea4f52ba5bc6688b43737567d6a991235da28
parentfc67c450837ec034174060a25889a55eed741a1d (diff)
downloadlinux-linaro-stable-7738a53a3a3aa8d82350280ff4bc7df9c3094123.tar.gz
Btrfs: add __get_block_group_index() helper
Add __get_block_group_index() helper to be able to derive block group index from an arbitary set of flags. Implement get_block_group_index() in terms of it. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
-rw-r--r--fs/btrfs/extent-tree.c17
1 files changed, 12 insertions, 5 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index faf52e030315..c44aa9680789 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -5248,22 +5248,29 @@ wait_block_group_cache_done(struct btrfs_block_group_cache *cache)
return 0;
}
-static int get_block_group_index(struct btrfs_block_group_cache *cache)
+static int __get_block_group_index(u64 flags)
{
int index;
- if (cache->flags & BTRFS_BLOCK_GROUP_RAID10)
+
+ if (flags & BTRFS_BLOCK_GROUP_RAID10)
index = 0;
- else if (cache->flags & BTRFS_BLOCK_GROUP_RAID1)
+ else if (flags & BTRFS_BLOCK_GROUP_RAID1)
index = 1;
- else if (cache->flags & BTRFS_BLOCK_GROUP_DUP)
+ else if (flags & BTRFS_BLOCK_GROUP_DUP)
index = 2;
- else if (cache->flags & BTRFS_BLOCK_GROUP_RAID0)
+ else if (flags & BTRFS_BLOCK_GROUP_RAID0)
index = 3;
else
index = 4;
+
return index;
}
+static int get_block_group_index(struct btrfs_block_group_cache *cache)
+{
+ return __get_block_group_index(cache->flags);
+}
+
enum btrfs_loop_type {
LOOP_CACHING_NOWAIT = 0,
LOOP_CACHING_WAIT = 1,