Commit c4a816c6 authored by Naohiro Aota's avatar Naohiro Aota Committed by David Sterba
Browse files

btrfs: introduce chunk allocation policy 



Introduce chunk allocation policy for btrfs. This policy controls how
chunks and device extents are allocated from devices.

Reviewed-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: default avatarJosef Bacik <josef@toxicpanda.com>
Signed-off-by: default avatarNaohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent b25c19f4

fs/btrfs/volumes.c

+1 −0
Original line number Diff line number Diff line
@@ -1205,6 +1205,7 @@ static int open_fs_devices(struct btrfs_fs_devices *fs_devices, 
	fs_devices->opened = 1;

	fs_devices->latest_bdev = latest_dev->bdev;

	fs_devices->total_rw_bytes = 0;

	fs_devices->chunk_alloc_policy = BTRFS_CHUNK_ALLOC_REGULAR;

out:

	return ret;

}

fs/btrfs/volumes.h

+6 −0
Original line number Diff line number Diff line
@@ -207,6 +207,10 @@ BTRFS_DEVICE_GETSET_FUNCS(total_bytes); 
BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes);

BTRFS_DEVICE_GETSET_FUNCS(bytes_used);



enum btrfs_chunk_allocation_policy {

	BTRFS_CHUNK_ALLOC_REGULAR,

};



struct btrfs_fs_devices {

	u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */

	u8 metadata_uuid[BTRFS_FSID_SIZE];
@@ -258,6 +262,8 @@ struct btrfs_fs_devices { 
	struct kobject *devices_kobj;

	struct kobject *devinfo_kobj;

	struct completion kobj_unregister;



	enum btrfs_chunk_allocation_policy chunk_alloc_policy;

};



#define BTRFS_BIO_INLINE_CSUM_SIZE	64