From: David Sterba <dsterba@suse.com>
Date: Fri, 17 May 2019 09:43:31 +0000 (+0200)
Subject: btrfs: use raid_attr table for btrfs_bg_type_to_factor
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=44b28adafd1f814fbde8b53a99eee83f3b31b2d9;p=openwrt%2Fstaging%2Fblogic.git

btrfs: use raid_attr table for btrfs_bg_type_to_factor

The factor is the number of copies.

Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 71add22e041a..bbc195c97c74 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -7586,10 +7586,9 @@ void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info)
  */
 int btrfs_bg_type_to_factor(u64 flags)
 {
-	if (flags & (BTRFS_BLOCK_GROUP_DUP | BTRFS_BLOCK_GROUP_RAID1 |
-		     BTRFS_BLOCK_GROUP_RAID10))
-		return 2;
-	return 1;
+	const int index = btrfs_bg_flags_to_raid_index(flags);
+
+	return btrfs_raid_array[index].ncopies;
 }