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authorDavid Sterba <dsterba@suse.com>2018-03-03 00:56:53 +0300
committerDavid Sterba <dsterba@suse.com>2019-11-18 19:51:49 +0300
commit8d6fac0087e538173f34ca7431ed9b58581acf28 (patch)
tree83a1c2bc2bf18cb604ce09124c1933e06d845c4d /include/uapi/linux/btrfs.h
parent47e6f7423b9196ad6832d26cae52b7015f81ee7f (diff)
downloadlinux-8d6fac0087e538173f34ca7431ed9b58581acf28.tar.xz
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 'include/uapi/linux/btrfs.h')
-rw-r--r--include/uapi/linux/btrfs.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/btrfs.h b/include/uapi/linux/btrfs.h
index ba22f91a3f5b..a2b761275bba 100644
--- a/include/uapi/linux/btrfs.h
+++ b/include/uapi/linux/btrfs.h
@@ -833,6 +833,7 @@ enum btrfs_err_code {
BTRFS_ERROR_DEV_ONLY_WRITABLE,
BTRFS_ERROR_DEV_EXCL_RUN_IN_PROGRESS,
BTRFS_ERROR_DEV_RAID1C3_MIN_NOT_MET,
+ BTRFS_ERROR_DEV_RAID1C4_MIN_NOT_MET,
};
#define BTRFS_IOC_SNAP_CREATE _IOW(BTRFS_IOCTL_MAGIC, 1, \