struct list_head dev_list;
struct list_head dev_alloc_list;
struct btrfs_fs_devices *fs_devices;
+
struct btrfs_root *dev_root;
+ struct rcu_string *name;
+
+ u64 generation;
+
+ spinlock_t io_lock ____cacheline_aligned;
+ int running_pending;
/* regular prio bios */
struct btrfs_pending_bios pending_bios;
/* WRITE_SYNC bios */
struct btrfs_pending_bios pending_sync_bios;
- u64 generation;
- int running_pending;
+ struct block_device *bdev;
+
+ /* the mode sent to blkdev_get */
+ fmode_t mode;
+
int writeable;
int in_fs_metadata;
int missing;
int can_discard;
int is_tgtdev_for_dev_replace;
- spinlock_t io_lock;
- /* the mode sent to blkdev_get */
- fmode_t mode;
-
- struct block_device *bdev;
-
-
- struct rcu_string *name;
-
/* the internal btrfs device id */
u64 devid;
- /* size of the device */
+ /* size of the device in memory */
u64 total_bytes;
- /* size of the disk */
+ /* size of the device on disk */
u64 disk_total_bytes;
/* bytes used */
/* minimal io size for this device */
u32 sector_size;
-
/* physical drive uuid (or lvm uuid) */
u8 uuid[BTRFS_UUID_SIZE];
+ /*
+ * size of the device on the current transaction
+ *
+ * This variant is update when committing the transaction,
+ * and protected by device_list_mutex
+ */
+ u64 commit_total_bytes;
+
+ /* bytes used on the current transaction */
+ u64 commit_bytes_used;
+ /*
+ * used to manage the device which is resized
+ *
+ * It is protected by chunk_lock.
+ */
+ struct list_head resized_list;
+
/* for sending down flush barriers */
int nobarriers;
struct bio *flush_bio;
struct radix_tree_root reada_zones;
struct radix_tree_root reada_extents;
-
/* disk I/O failure stats. For detailed description refer to
* enum btrfs_dev_stat_values in ioctl.h */
int dev_stats_valid;
- int dev_stats_dirty; /* counters need to be written to disk */
+
+ /* Counter to record the change of device stats */
+ atomic_t dev_stats_ccnt;
atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX];
};
struct btrfs_fs_devices {
u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
- /* the device with this id has the most recent copy of the super */
- u64 latest_devid;
- u64 latest_trans;
u64 num_devices;
u64 open_devices;
u64 rw_devices;
u64 missing_devices;
u64 total_rw_bytes;
- u64 num_can_discard;
u64 total_devices;
struct block_device *latest_bdev;
struct mutex device_list_mutex;
struct list_head devices;
+ struct list_head resized_devices;
/* devices not currently being allocated */
struct list_head alloc_list;
struct list_head list;
int btrfs_shrink_device(struct btrfs_device *device, u64 new_size);
int btrfs_init_new_device(struct btrfs_root *root, char *path);
int btrfs_init_dev_replace_tgtdev(struct btrfs_root *root, char *device_path,
+ struct btrfs_device *srcdev,
struct btrfs_device **device_out);
int btrfs_balance(struct btrfs_balance_control *bctl,
struct btrfs_ioctl_balance_args *bargs);
int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans,
struct btrfs_root *extent_root,
u64 chunk_offset, u64 chunk_size);
+
+static inline int btrfs_dev_stats_dirty(struct btrfs_device *dev)
+{
+ return atomic_read(&dev->dev_stats_ccnt);
+}
+
static inline void btrfs_dev_stat_inc(struct btrfs_device *dev,
int index)
{
atomic_inc(dev->dev_stat_values + index);
- dev->dev_stats_dirty = 1;
+ smp_mb__before_atomic();
+ atomic_inc(&dev->dev_stats_ccnt);
}
static inline int btrfs_dev_stat_read(struct btrfs_device *dev,
int ret;
ret = atomic_xchg(dev->dev_stat_values + index, 0);
- dev->dev_stats_dirty = 1;
+ smp_mb__before_atomic();
+ atomic_inc(&dev->dev_stats_ccnt);
return ret;
}
int index, unsigned long val)
{
atomic_set(dev->dev_stat_values + index, val);
- dev->dev_stats_dirty = 1;
+ smp_mb__before_atomic();
+ atomic_inc(&dev->dev_stats_ccnt);
}
static inline void btrfs_dev_stat_reset(struct btrfs_device *dev,
{
btrfs_dev_stat_set(dev, index, 0);
}
+
+void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info);
+void btrfs_update_commit_device_bytes_used(struct btrfs_root *root,
+ struct btrfs_transaction *transaction);
#endif