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Commit 7738a53a authored by Ilya Dryomov's avatar Ilya Dryomov
Browse files

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: default avatarIlya Dryomov <idryomov@gmail.com>
parent fc67c450

fs/btrfs/extent-tree.c

+12 −5
Original line number Diff line number Diff line
@@ -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,