Btrfs: Add support for device scanning and detection ioctls
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 2025912..12f297e 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -24,6 +24,8 @@
struct block_device *bdev;
+ char *name;
+
/* the internal btrfs device id */
u64 devid;
@@ -49,6 +51,20 @@
u8 uuid[BTRFS_DEV_UUID_SIZE];
};
+struct btrfs_fs_devices {
+ u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
+
+ /* the device with this id has the most recent coyp of the super */
+ u64 latest_devid;
+ u64 latest_trans;
+ u64 lowest_devid;
+ u64 num_devices;
+ struct block_device *latest_bdev;
+ struct block_device *lowest_bdev;
+ struct list_head devices;
+ struct list_head list;
+};
+
int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
struct btrfs_device *device,
u64 owner, u64 num_bytes, u64 *start);
@@ -67,4 +83,13 @@
int btrfs_map_block(struct btrfs_mapping_tree *map_tree,
u64 logical, u64 *phys, u64 *length,
struct btrfs_device **dev);
+int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
+ int flags, void *holder);
+int btrfs_scan_one_device(const char *path, int flags, void *holder,
+ struct btrfs_fs_devices **fs_devices_ret);
+int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
+int btrfs_add_device(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root,
+ struct btrfs_device *device);
+int btrfs_cleanup_fs_uuids(void);
#endif