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| author |   David Sterba <dsterba@suse.com> | 2018-03-02 22:56:53 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2019-11-18 17:51:49 +0100 |
| commit | 8d6fac0087e538173f34ca7431ed9b58581acf28 (patch) | |
| tree | 83a1c2bc2bf18cb604ce09124c1933e06d845c4d /fs/btrfs/volumes.h | |
| parent | btrfs: add support for 3-copy replication (raid1c3) (diff) | |
| download | linux-dev-8d6fac0087e538173f34ca7431ed9b58581acf28.tar.xz linux-dev-8d6fac0087e538173f34ca7431ed9b58581acf28.zip | |
btrfs: add support for 4-copy replication (raid1c4)
Add new block group profile to store 4 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-
and 3-copy RAID1.
The minimum number of devices is 4, the maximum number of devices/chunks
that can be lost/damaged is 3. There is no comparable traditional RAID
level, the profile is added for future needs to accompany triple-parity
and beyond.
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to '')
| -rw-r--r-- | fs/btrfs/volumes.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index a4e26b84e1b9..46987a2da786 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -547,6 +547,8 @@ static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags) return BTRFS_RAID_RAID1; else if (flags & BTRFS_BLOCK_GROUP_RAID1C3) return BTRFS_RAID_RAID1C3; + else if (flags & BTRFS_BLOCK_GROUP_RAID1C4) + return BTRFS_RAID_RAID1C4; else if (flags & BTRFS_BLOCK_GROUP_DUP) return BTRFS_RAID_DUP; else if (flags & BTRFS_BLOCK_GROUP_RAID0) |