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Commit e3176ca2 authored by Ilya Dryomov's avatar Ilya Dryomov
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Btrfs: stop silently switching single chunks to raid0 on balance 



This has been causing a lot of confusion for quite a while now and a lot
of users were surprised by this (some of them were even stuck in a
ENOSPC situation which they couldn't easily get out of).  The addition
of restriper gives users a clear choice between raid0 and drive concat
setup so there's absolutely no excuse for us to keep doing this.

Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
parent ea466794

fs/btrfs/extent-tree.c

+2 −3
Original line number Diff line number Diff line
@@ -6941,7 +6941,6 @@ static u64 update_block_group_flags(struct btrfs_root *root, u64 flags) 
		if (flags & (BTRFS_BLOCK_GROUP_RAID1 |

			     BTRFS_BLOCK_GROUP_RAID10))

			return stripped | BTRFS_BLOCK_GROUP_DUP;

		return flags;

	} else {

		/* they already had raid on here, just return */

		if (flags & stripped)
@@ -6954,9 +6953,9 @@ static u64 update_block_group_flags(struct btrfs_root *root, u64 flags) 
		if (flags & BTRFS_BLOCK_GROUP_DUP)

			return stripped | BTRFS_BLOCK_GROUP_RAID1;



		/* turn single device chunks into raid0 */

		return stripped | BTRFS_BLOCK_GROUP_RAID0;

		/* this is drive concat, leave it alone */

	}



	return flags;

}