btrfs: introduce chunk allocation policy (c4a816c6) · Commits · 戴 / test

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

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;
		}

+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