diff options
Diffstat (limited to '')
| -rw-r--r-- | fs/btrfs/volumes.h | 45 |
1 files changed, 31 insertions, 14 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 2128a032c3..9cc374864a 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -90,13 +90,11 @@ struct btrfs_device { u64 generation; + struct bdev_handle *bdev_handle; struct block_device *bdev; struct btrfs_zoned_device_info *zone_info; - /* block device holder for blkdev_get/put */ - void *holder; - /* * Device's major-minor number. Must be set even if the device is not * opened (bdev == NULL), unless the device is missing. @@ -290,6 +288,19 @@ struct btrfs_fs_devices { * - Following shall be true at all times: * - metadata_uuid == btrfs_header::fsid * - metadata_uuid == btrfs_dev_item::fsid + * + * - Relations between fsid and metadata_uuid in sb and fs_devices: + * - Normal: + * fs_devices->fsid == fs_devices->metadata_uuid == sb->fsid + * sb->metadata_uuid == 0 + * + * - When the BTRFS_FEATURE_INCOMPAT_METADATA_UUID flag is set: + * fs_devices->fsid == sb->fsid + * fs_devices->metadata_uuid == sb->metadata_uuid + * + * - When in-memory fs_devices->temp_fsid is true + * fs_devices->fsid = random + * fs_devices->metadata_uuid == sb->fsid */ u8 metadata_uuid[BTRFS_FSID_SIZE]; @@ -353,9 +364,10 @@ struct btrfs_fs_devices { bool rotating; /* Devices support TRIM/discard commands. */ bool discardable; - bool fsid_change; /* The filesystem is a seed filesystem. */ bool seeding; + /* The mount needs to use a randomly generated fsid. */ + bool temp_fsid; struct btrfs_fs_info *fs_info; /* sysfs kobjects */ @@ -381,12 +393,12 @@ struct btrfs_fs_devices { struct btrfs_io_stripe { struct btrfs_device *dev; - union { - /* Block mapping */ - u64 physical; - /* For the endio handler */ - struct btrfs_io_context *bioc; - }; + /* Block mapping. */ + u64 physical; + u64 length; + bool is_scrub; + /* For the endio handler. */ + struct btrfs_io_context *bioc; }; struct btrfs_discard_stripe { @@ -419,6 +431,11 @@ struct btrfs_io_context { atomic_t error; u16 max_errors; + u64 logical; + u64 size; + /* Raid stripe tree ordered entry. */ + struct list_head rst_ordered_entry; + /* * The total number of stripes, including the extra duplicated * stripe for replace. @@ -596,8 +613,7 @@ void btrfs_put_bioc(struct btrfs_io_context *bioc); int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op, u64 logical, u64 *length, struct btrfs_io_context **bioc_ret, - struct btrfs_io_stripe *smap, int *mirror_num_ret, - int need_raid_map); + struct btrfs_io_stripe *smap, int *mirror_num_ret); int btrfs_map_repair_block(struct btrfs_fs_info *fs_info, struct btrfs_io_stripe *smap, u64 logical, u32 length, int mirror_num); @@ -611,7 +627,8 @@ struct btrfs_block_group *btrfs_create_chunk(struct btrfs_trans_handle *trans, void btrfs_mapping_tree_free(struct extent_map_tree *tree); int btrfs_open_devices(struct btrfs_fs_devices *fs_devices, blk_mode_t flags, void *holder); -struct btrfs_device *btrfs_scan_one_device(const char *path, blk_mode_t flags); +struct btrfs_device *btrfs_scan_one_device(const char *path, blk_mode_t flags, + bool mount_arg_dev); int btrfs_forget_devices(dev_t devt); void btrfs_close_devices(struct btrfs_fs_devices *fs_devices); void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices); @@ -629,7 +646,7 @@ struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info, void btrfs_put_dev_args_from_path(struct btrfs_dev_lookup_args *args); int btrfs_rm_device(struct btrfs_fs_info *fs_info, struct btrfs_dev_lookup_args *args, - struct block_device **bdev, void **holder); + struct bdev_handle **bdev_handle); void __exit btrfs_cleanup_fs_uuids(void); int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len); int btrfs_grow_device(struct btrfs_trans_handle *trans, |