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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: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Ilya Dryomov 2012-03-27 17:09:16 +03:00
parent ea46679408
commit e3176ca276
1 changed files with 2 additions and 3 deletions
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5
fs/btrfs/extent-tree.c
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@ -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;
}