summaryrefslogtreecommitdiffstats
path: root/fs/btrfs/volumes.h
diff options
context:
space:
mode:
authorDavid Sterba <dsterba@suse.com>2018-03-02 22:56:53 +0100
committerDavid Sterba <dsterba@suse.com>2019-11-18 17:51:49 +0100
commit47e6f7423b9196ad6832d26cae52b7015f81ee7f (patch)
tree3f06408a77645e1546ed90445cf6584c515ca44d /fs/btrfs/volumes.h
parentfac07d2b091542f7169978e4c1413747d8d0e965 (diff)
downloadlinux-47e6f7423b9196ad6832d26cae52b7015f81ee7f.tar.bz2
btrfs: add support for 3-copy replication (raid1c3)
Add new block group profile to store 3 copies in a simliar way that current RAID1 does. The profile attributes and constraints are defined in the raid table and used by the same code that already handles the 2-copy RAID1. The minimum number of devices is 3, the maximum number of devices/chunks that can be lost/damaged is 2. Like RAID6 but with 33% space utilization. Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/volumes.h')
-rw-r--r--fs/btrfs/volumes.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index ac4ba8c57283..a4e26b84e1b9 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -545,6 +545,8 @@ static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags)
return BTRFS_RAID_RAID10;
else if (flags & BTRFS_BLOCK_GROUP_RAID1)
return BTRFS_RAID_RAID1;
+ else if (flags & BTRFS_BLOCK_GROUP_RAID1C3)
+ return BTRFS_RAID_RAID1C3;
else if (flags & BTRFS_BLOCK_GROUP_DUP)
return BTRFS_RAID_DUP;
else if (flags & BTRFS_BLOCK_GROUP_RAID0)