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btrfs: add incompat for raid1 with 3, 4 copies

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The new raid1c3 and raid1c4 profiles are backward incompatible and the
name shall be 'raid1c34', the status can be found in the global
supported features in /sys/fs/btrfs/features or in the per-filesystem
directory.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2018-07-10 18:15:05 +02:00
parent 8d6fac0087
commit cfbb825c76
4 changed files with 14 additions and 1 deletions
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1
include/uapi/linux/btrfs.h
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@ -270,6 +270,7 @@ struct btrfs_ioctl_fs_info_args {
#define BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA (1ULL << 8)
#define BTRFS_FEATURE_INCOMPAT_NO_HOLES (1ULL << 9)
#define BTRFS_FEATURE_INCOMPAT_METADATA_UUID (1ULL << 10)
#define BTRFS_FEATURE_INCOMPAT_RAID1C34 (1ULL << 11)
struct btrfs_ioctl_feature_flags {
__u64 compat_flags;