forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
153 lines
5.6 KiB
153 lines
5.6 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
/* |
|
* Copyright (C) 2007 Oracle. All rights reserved. |
|
*/ |
|
|
|
#ifndef BTRFS_DISK_IO_H |
|
#define BTRFS_DISK_IO_H |
|
|
|
#define BTRFS_SUPER_INFO_OFFSET SZ_64K |
|
#define BTRFS_SUPER_INFO_SIZE 4096 |
|
|
|
#define BTRFS_SUPER_MIRROR_MAX 3 |
|
#define BTRFS_SUPER_MIRROR_SHIFT 12 |
|
|
|
/* |
|
* Fixed blocksize for all devices, applies to specific ways of reading |
|
* metadata like superblock. Must meet the set_blocksize requirements. |
|
* |
|
* Do not change. |
|
*/ |
|
#define BTRFS_BDEV_BLOCKSIZE (4096) |
|
|
|
enum btrfs_wq_endio_type { |
|
BTRFS_WQ_ENDIO_DATA, |
|
BTRFS_WQ_ENDIO_METADATA, |
|
BTRFS_WQ_ENDIO_FREE_SPACE, |
|
BTRFS_WQ_ENDIO_RAID56, |
|
}; |
|
|
|
static inline u64 btrfs_sb_offset(int mirror) |
|
{ |
|
u64 start = SZ_16K; |
|
if (mirror) |
|
return start << (BTRFS_SUPER_MIRROR_SHIFT * mirror); |
|
return BTRFS_SUPER_INFO_OFFSET; |
|
} |
|
|
|
struct btrfs_device; |
|
struct btrfs_fs_devices; |
|
|
|
void btrfs_check_leaked_roots(struct btrfs_fs_info *fs_info); |
|
void btrfs_init_fs_info(struct btrfs_fs_info *fs_info); |
|
int btrfs_verify_level_key(struct extent_buffer *eb, int level, |
|
struct btrfs_key *first_key, u64 parent_transid); |
|
struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr, |
|
u64 owner_root, u64 parent_transid, |
|
int level, struct btrfs_key *first_key); |
|
struct extent_buffer *btrfs_find_create_tree_block( |
|
struct btrfs_fs_info *fs_info, |
|
u64 bytenr, u64 owner_root, |
|
int level); |
|
void btrfs_clean_tree_block(struct extent_buffer *buf); |
|
void btrfs_clear_oneshot_options(struct btrfs_fs_info *fs_info); |
|
int btrfs_start_pre_rw_mount(struct btrfs_fs_info *fs_info); |
|
int __cold open_ctree(struct super_block *sb, |
|
struct btrfs_fs_devices *fs_devices, |
|
char *options); |
|
void __cold close_ctree(struct btrfs_fs_info *fs_info); |
|
int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors); |
|
struct btrfs_super_block *btrfs_read_dev_super(struct block_device *bdev); |
|
struct btrfs_super_block *btrfs_read_dev_one_super(struct block_device *bdev, |
|
int copy_num); |
|
int btrfs_commit_super(struct btrfs_fs_info *fs_info); |
|
struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root, |
|
struct btrfs_key *key); |
|
int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info, |
|
struct btrfs_root *root); |
|
void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info); |
|
|
|
struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info, |
|
u64 objectid, bool check_ref); |
|
struct btrfs_root *btrfs_get_new_fs_root(struct btrfs_fs_info *fs_info, |
|
u64 objectid, dev_t anon_dev); |
|
struct btrfs_root *btrfs_get_fs_root_commit_root(struct btrfs_fs_info *fs_info, |
|
struct btrfs_path *path, |
|
u64 objectid); |
|
|
|
void btrfs_free_fs_info(struct btrfs_fs_info *fs_info); |
|
int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info); |
|
void btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info); |
|
void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info); |
|
void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info, |
|
struct btrfs_root *root); |
|
int btrfs_validate_metadata_buffer(struct btrfs_io_bio *io_bio, |
|
struct page *page, u64 start, u64 end, |
|
int mirror); |
|
blk_status_t btrfs_submit_metadata_bio(struct inode *inode, struct bio *bio, |
|
int mirror_num, unsigned long bio_flags); |
|
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
|
struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info); |
|
#endif |
|
|
|
/* |
|
* This function is used to grab the root, and avoid it is freed when we |
|
* access it. But it doesn't ensure that the tree is not dropped. |
|
* |
|
* If you want to ensure the whole tree is safe, you should use |
|
* fs_info->subvol_srcu |
|
*/ |
|
static inline struct btrfs_root *btrfs_grab_root(struct btrfs_root *root) |
|
{ |
|
if (!root) |
|
return NULL; |
|
if (refcount_inc_not_zero(&root->refs)) |
|
return root; |
|
return NULL; |
|
} |
|
|
|
void btrfs_put_root(struct btrfs_root *root); |
|
void btrfs_mark_buffer_dirty(struct extent_buffer *buf); |
|
int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid, |
|
int atomic); |
|
int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid, int level, |
|
struct btrfs_key *first_key); |
|
blk_status_t btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio, |
|
enum btrfs_wq_endio_type metadata); |
|
blk_status_t btrfs_wq_submit_bio(struct inode *inode, struct bio *bio, |
|
int mirror_num, unsigned long bio_flags, |
|
u64 dio_file_offset, |
|
extent_submit_bio_start_t *submit_bio_start); |
|
blk_status_t btrfs_submit_bio_done(void *private_data, struct bio *bio, |
|
int mirror_num); |
|
int btrfs_alloc_log_tree_node(struct btrfs_trans_handle *trans, |
|
struct btrfs_root *root); |
|
int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans, |
|
struct btrfs_fs_info *fs_info); |
|
int btrfs_add_log_tree(struct btrfs_trans_handle *trans, |
|
struct btrfs_root *root); |
|
void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *trans, |
|
struct btrfs_fs_info *fs_info); |
|
void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans, |
|
struct btrfs_fs_info *fs_info); |
|
struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans, |
|
u64 objectid); |
|
int btree_lock_page_hook(struct page *page, void *data, |
|
void (*flush_fn)(void *)); |
|
int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags); |
|
int btrfs_get_free_objectid(struct btrfs_root *root, u64 *objectid); |
|
int btrfs_init_root_free_objectid(struct btrfs_root *root); |
|
int __init btrfs_end_io_wq_init(void); |
|
void __cold btrfs_end_io_wq_exit(void); |
|
|
|
#ifdef CONFIG_DEBUG_LOCK_ALLOC |
|
void btrfs_set_buffer_lockdep_class(u64 objectid, |
|
struct extent_buffer *eb, int level); |
|
#else |
|
static inline void btrfs_set_buffer_lockdep_class(u64 objectid, |
|
struct extent_buffer *eb, int level) |
|
{ |
|
} |
|
#endif |
|
|
|
#endif
|
|
|