#define __BTRFS_VOLUMES_
#include <linux/bio.h>
+#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 buffer_head *pending_io;
+
+ /* regular prio bios */
+ struct btrfs_pending_bios pending_bios;
+ /* WRITE_SYNC bios */
+ struct btrfs_pending_bios pending_sync_bios;
+
+ int running_pending;
+ u64 generation;
+
int barriers;
+ int writeable;
+ int in_fs_metadata;
+
spinlock_t io_lock;
struct block_device *bdev;
- u64 total_ios;
+ /* the mode sent to open_bdev_exclusive */
+ fmode_t mode;
char *name;
/* size of the device */
u64 total_bytes;
+ /* size of the disk */
+ u64 disk_total_bytes;
+
/* bytes used */
u64 bytes_used;
/* physical drive uuid (or lvm uuid) */
u8 uuid[BTRFS_UUID_SIZE];
+
+ struct btrfs_work work;
};
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 */
+ /* the device with this id has the most recent copy of the super */
u64 latest_devid;
u64 latest_trans;
- u64 lowest_devid;
u64 num_devices;
+ u64 open_devices;
+ u64 rw_devices;
+ u64 total_rw_bytes;
struct block_device *latest_bdev;
- struct block_device *lowest_bdev;
+
+ /* 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 */
+ struct list_head alloc_list;
struct list_head list;
+
+ struct btrfs_fs_devices *seed;
+ 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 {
struct btrfs_multi_bio {
atomic_t stripes_pending;
bio_end_io_t *end_io;
+ struct bio *orig_bio;
void *private;
- int error;
+ atomic_t error;
+ int max_errors;
int num_stripes;
struct btrfs_bio_stripe stripes[];
};
int btrfs_alloc_dev_extent(struct btrfs_trans_handle *trans,
struct btrfs_device *device,
u64 chunk_tree, u64 chunk_objectid,
- u64 chunk_offset,
- u64 num_bytes, u64 *start);
+ u64 chunk_offset, u64 start, u64 num_bytes);
int btrfs_map_block(struct btrfs_mapping_tree *map_tree, int rw,
u64 logical, u64 *length,
struct btrfs_multi_bio **multi_ret, int mirror_num);
+int btrfs_rmap_block(struct btrfs_mapping_tree *map_tree,
+ u64 chunk_start, u64 physical, u64 devid,
+ u64 **logical, int *naddrs, int *stripe_len);
int btrfs_read_sys_array(struct btrfs_root *root);
int btrfs_read_chunk_tree(struct btrfs_root *root);
int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
- struct btrfs_root *extent_root, u64 *start,
- u64 *num_bytes, u64 type);
+ struct btrfs_root *extent_root, u64 type);
void btrfs_mapping_init(struct btrfs_mapping_tree *tree);
void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree);
int btrfs_map_bio(struct btrfs_root *root, int rw, struct bio *bio,
- int mirror_num);
+ int mirror_num, int async_submit);
int btrfs_read_super_device(struct btrfs_root *root, struct extent_buffer *buf);
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,
+ fmode_t flags, void *holder);
+int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
struct btrfs_fs_devices **fs_devices_ret);
int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
+int btrfs_close_extra_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_rm_device(struct btrfs_root *root, char *device_path);
int btrfs_cleanup_fs_uuids(void);
int btrfs_num_copies(struct btrfs_mapping_tree *map_tree, u64 logical, u64 len);
+int btrfs_unplug_page(struct btrfs_mapping_tree *map_tree,
+ u64 logical, struct page *page);
+int btrfs_grow_device(struct btrfs_trans_handle *trans,
+ struct btrfs_device *device, u64 new_size);
+struct btrfs_device *btrfs_find_device(struct btrfs_root *root, u64 devid,
+ u8 *uuid, u8 *fsid);
+int btrfs_shrink_device(struct btrfs_device *device, u64 new_size);
+int btrfs_init_new_device(struct btrfs_root *root, char *path);
+int btrfs_balance(struct btrfs_root *dev_root);
+void btrfs_unlock_volumes(void);
+void btrfs_lock_volumes(void);
+int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset);
+int find_free_dev_extent(struct btrfs_trans_handle *trans,
+ struct btrfs_device *device, u64 num_bytes,
+ u64 *start, u64 *max_avail);
#endif