#include "async-thread.h"
struct buffer_head;
+struct btrfs_pending_bios {
+ struct bio *head;
+ struct bio *tail;
+};
+
struct btrfs_device {
struct list_head dev_list;
struct list_head dev_alloc_list;
struct btrfs_fs_devices *fs_devices;
struct btrfs_root *dev_root;
- struct bio *pending_bios;
- struct bio *pending_bio_tail;
+
+ /* regular prio bios */
+ struct btrfs_pending_bios pending_bios;
+ /* WRITE_SYNC bios */
+ struct btrfs_pending_bios pending_sync_bios;
+
int running_pending;
u64 generation;
/* size of the device */
u64 total_bytes;
+ /* size of the disk */
+ u64 disk_total_bytes;
+
/* bytes used */
u64 bytes_used;
u64 rw_devices;
u64 total_rw_bytes;
struct block_device *latest_bdev;
- /* all of the devices in the FS */
+
+ /* all of the devices in the FS, protected by a mutex
+ * so we can safely walk it to write out the supers without
+ * worrying about add/remove by the multi-device code
+ */
+ struct mutex device_list_mutex;
struct list_head devices;
/* devices not currently being allocated */
int seeding;
int opened;
+
+ /* set when we find or add a device that doesn't have the
+ * nonrot flag set
+ */
+ int rotating;
};
struct btrfs_bio_stripe {