From e4d8ec0f65b91bfb4984a4927632ded95f9825ad Mon Sep 17 00:00:00 2001 From: Ilya Dryomov Date: Mon, 16 Jan 2012 22:04:48 +0200 Subject: Btrfs: implement online profile changing Profile changing is done by launching a balance with BTRFS_BALANCE_CONVERT bits set and target fields of respective btrfs_balance_args structs initialized. Profile reducing code in this case will pick restriper's target profile if it's available instead of doing a blind reduce. If target profile is not yet available it goes back to a plain reduce. Signed-off-by: Ilya Dryomov --- fs/btrfs/volumes.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'fs/btrfs/volumes.h') diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index eac26c359312..79ee9c324562 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -196,6 +196,9 @@ struct map_lookup { #define BTRFS_BALANCE_TYPE_MASK (BTRFS_BALANCE_DATA | \ BTRFS_BALANCE_SYSTEM | \ BTRFS_BALANCE_METADATA) + +#define BTRFS_BALANCE_FORCE (1ULL << 3) + /* * Balance filters */ @@ -205,6 +208,8 @@ struct map_lookup { #define BTRFS_BALANCE_ARGS_DRANGE (1ULL << 3) #define BTRFS_BALANCE_ARGS_VRANGE (1ULL << 4) +#define BTRFS_BALANCE_ARGS_CONVERT (1ULL << 8) + struct btrfs_balance_args; struct btrfs_balance_control { struct btrfs_fs_info *fs_info; -- cgit v1.2.2