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| author | David Sterba <dsterba@suse.com> | 2018-03-03 00:56:53 +0300 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-11-18 19:51:49 +0300 |
| commit | 47e6f7423b9196ad6832d26cae52b7015f81ee7f (patch) | |
| tree | 3f06408a77645e1546ed90445cf6584c515ca44d /include/uapi/linux/btrfs_tree.h | |
| parent | fac07d2b091542f7169978e4c1413747d8d0e965 (diff) | |
| download | linux-47e6f7423b9196ad6832d26cae52b7015f81ee7f.tar.xz | |
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 'include/uapi/linux/btrfs_tree.h')
| -rw-r--r-- | include/uapi/linux/btrfs_tree.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h index 5160be1d7332..52b2964b0311 100644 --- a/include/uapi/linux/btrfs_tree.h +++ b/include/uapi/linux/btrfs_tree.h @@ -841,6 +841,7 @@ struct btrfs_dev_replace_item { #define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6) #define BTRFS_BLOCK_GROUP_RAID5 (1ULL << 7) #define BTRFS_BLOCK_GROUP_RAID6 (1ULL << 8) +#define BTRFS_BLOCK_GROUP_RAID1C3 (1ULL << 9) #define BTRFS_BLOCK_GROUP_RESERVED (BTRFS_AVAIL_ALLOC_BIT_SINGLE | \ BTRFS_SPACE_INFO_GLOBAL_RSV) @@ -852,6 +853,7 @@ enum btrfs_raid_types { BTRFS_RAID_SINGLE, BTRFS_RAID_RAID5, BTRFS_RAID_RAID6, + BTRFS_RAID_RAID1C3, BTRFS_NR_RAID_TYPES }; @@ -861,6 +863,7 @@ enum btrfs_raid_types { #define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \ BTRFS_BLOCK_GROUP_RAID1 | \ + BTRFS_BLOCK_GROUP_RAID1C3 | \ BTRFS_BLOCK_GROUP_RAID5 | \ BTRFS_BLOCK_GROUP_RAID6 | \ BTRFS_BLOCK_GROUP_DUP | \ @@ -868,7 +871,8 @@ enum btrfs_raid_types { #define BTRFS_BLOCK_GROUP_RAID56_MASK (BTRFS_BLOCK_GROUP_RAID5 | \ BTRFS_BLOCK_GROUP_RAID6) -#define BTRFS_BLOCK_GROUP_RAID1_MASK (BTRFS_BLOCK_GROUP_RAID1) +#define BTRFS_BLOCK_GROUP_RAID1_MASK (BTRFS_BLOCK_GROUP_RAID1 | \ + BTRFS_BLOCK_GROUP_RAID1C3) /* * We need a bit for restriper to be able to tell when chunks of type |