write in 30M

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2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/fs/btrfs/disk-io.h
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@@ -21,11 +21,10 @@
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 #define BTRFS_BDEV_BLOCKSIZE	(4096)
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 enum btrfs_wq_endio_type {
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-	BTRFS_WQ_ENDIO_DATA = 0,
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-	BTRFS_WQ_ENDIO_METADATA = 1,
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-	BTRFS_WQ_ENDIO_FREE_SPACE = 2,
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-	BTRFS_WQ_ENDIO_RAID56 = 3,
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-	BTRFS_WQ_ENDIO_DIO_REPAIR = 4,
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+	BTRFS_WQ_ENDIO_DATA,
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+	BTRFS_WQ_ENDIO_METADATA,
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+	BTRFS_WQ_ENDIO_FREE_SPACE,
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+	BTRFS_WQ_ENDIO_RAID56,
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 };
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 static inline u64 btrfs_sb_offset(int mirror)
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@@ -39,54 +38,52 @@
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 struct btrfs_device;
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 struct btrfs_fs_devices;
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-int btrfs_verify_level_key(struct btrfs_fs_info *fs_info,
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-			   struct extent_buffer *eb, int level,
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+void btrfs_check_leaked_roots(struct btrfs_fs_info *fs_info);
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+void btrfs_init_fs_info(struct btrfs_fs_info *fs_info);
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+int btrfs_verify_level_key(struct extent_buffer *eb, int level,
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 			   struct btrfs_key *first_key, u64 parent_transid);
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 struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr,
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 				      u64 parent_transid, int level,
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 				      struct btrfs_key *first_key);
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 void readahead_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr);
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-int reada_tree_block_flagged(struct btrfs_fs_info *fs_info, u64 bytenr,
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-			 int mirror_num, struct extent_buffer **eb);
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 struct extent_buffer *btrfs_find_create_tree_block(
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 						struct btrfs_fs_info *fs_info,
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 						u64 bytenr);
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-void clean_tree_block(struct btrfs_fs_info *fs_info, struct extent_buffer *buf);
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-int open_ctree(struct super_block *sb,
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+void btrfs_clean_tree_block(struct extent_buffer *buf);
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+int __cold open_ctree(struct super_block *sb,
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 	       struct btrfs_fs_devices *fs_devices,
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 	       char *options);
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-void close_ctree(struct btrfs_fs_info *fs_info);
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+void __cold close_ctree(struct btrfs_fs_info *fs_info);
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 int write_all_supers(struct btrfs_fs_info *fs_info, int max_mirrors);
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-struct buffer_head *btrfs_read_dev_super(struct block_device *bdev);
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-int btrfs_read_dev_one_super(struct block_device *bdev, int copy_num,
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-			struct buffer_head **bh_ret);
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+struct btrfs_super_block *btrfs_read_dev_super(struct block_device *bdev);
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+struct btrfs_super_block *btrfs_read_dev_one_super(struct block_device *bdev,
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+						   int copy_num);
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 int btrfs_commit_super(struct btrfs_fs_info *fs_info);
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-struct btrfs_root *btrfs_read_fs_root(struct btrfs_root *tree_root,
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-				      struct btrfs_key *location);
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-int btrfs_init_fs_root(struct btrfs_root *root);
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-struct btrfs_root *btrfs_lookup_fs_root(struct btrfs_fs_info *fs_info,
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-					u64 root_id);
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+struct btrfs_root *btrfs_read_tree_root(struct btrfs_root *tree_root,
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+					struct btrfs_key *key);
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 int btrfs_insert_fs_root(struct btrfs_fs_info *fs_info,
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 			 struct btrfs_root *root);
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 void btrfs_free_fs_roots(struct btrfs_fs_info *fs_info);
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 struct btrfs_root *btrfs_get_fs_root(struct btrfs_fs_info *fs_info,
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-				     struct btrfs_key *key,
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-				     bool check_ref);
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-static inline struct btrfs_root *
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-btrfs_read_fs_root_no_name(struct btrfs_fs_info *fs_info,
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-			   struct btrfs_key *location)
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-{
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-	return btrfs_get_fs_root(fs_info, location, true);
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-}
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+				     u64 objectid, bool check_ref);
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+struct btrfs_root *btrfs_get_new_fs_root(struct btrfs_fs_info *fs_info,
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+					 u64 objectid, dev_t anon_dev);
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+struct btrfs_root *btrfs_get_fs_root_commit_root(struct btrfs_fs_info *fs_info,
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+						 struct btrfs_path *path,
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+						 u64 objectid);
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+void btrfs_free_fs_info(struct btrfs_fs_info *fs_info);
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 int btrfs_cleanup_fs_roots(struct btrfs_fs_info *fs_info);
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 void btrfs_btree_balance_dirty(struct btrfs_fs_info *fs_info);
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 void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info);
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 void btrfs_drop_and_free_fs_root(struct btrfs_fs_info *fs_info,
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 				 struct btrfs_root *root);
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-void btrfs_free_fs_root(struct btrfs_root *root);
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-
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+int btrfs_validate_metadata_buffer(struct btrfs_io_bio *io_bio, u64 phy_offset,
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+				   struct page *page, u64 start, u64 end,
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+				   int mirror);
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+blk_status_t btrfs_submit_metadata_bio(struct inode *inode, struct bio *bio,
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+				       int mirror_num, unsigned long bio_flags);
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 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
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 struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info);
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 #endif
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@@ -98,26 +95,21 @@
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  * If you want to ensure the whole tree is safe, you should use
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  * 	fs_info->subvol_srcu
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  */
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-static inline struct btrfs_root *btrfs_grab_fs_root(struct btrfs_root *root)
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+static inline struct btrfs_root *btrfs_grab_root(struct btrfs_root *root)
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 {
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+	if (!root)
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+		return NULL;
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 	if (refcount_inc_not_zero(&root->refs))
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 		return root;
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 	return NULL;
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 }
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-static inline void btrfs_put_fs_root(struct btrfs_root *root)
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-{
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-	if (refcount_dec_and_test(&root->refs))
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-		kfree(root);
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-}
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-
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+void btrfs_put_root(struct btrfs_root *root);
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 void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
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 int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid,
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 			  int atomic);
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 int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid, int level,
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 		      struct btrfs_key *first_key);
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-u32 btrfs_csum_data(const char *data, u32 seed, size_t len);
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-void btrfs_csum_final(u32 crc, u8 *result);
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 blk_status_t btrfs_bio_wq_end_io(struct btrfs_fs_info *info, struct bio *bio,
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 			enum btrfs_wq_endio_type metadata);
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 blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
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@@ -126,8 +118,6 @@
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 			extent_submit_bio_start_t *submit_bio_start);
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 blk_status_t btrfs_submit_bio_done(void *private_data, struct bio *bio,
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 			  int mirror_num);
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-int btrfs_write_tree_block(struct extent_buffer *buf);
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-void btrfs_wait_tree_block_writeback(struct extent_buffer *buf);
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 int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
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 			     struct btrfs_fs_info *fs_info);
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 int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
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@@ -137,14 +127,12 @@
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 void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans,
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 				  struct btrfs_fs_info *fs_info);
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 struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
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-				     struct btrfs_fs_info *fs_info,
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 				     u64 objectid);
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 int btree_lock_page_hook(struct page *page, void *data,
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 				void (*flush_fn)(void *));
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-struct extent_map *btree_get_extent(struct btrfs_inode *inode,
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-		struct page *page, size_t pg_offset, u64 start, u64 len,
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-		int create);
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 int btrfs_get_num_tolerated_disk_barrier_failures(u64 flags);
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+int btrfs_find_free_objectid(struct btrfs_root *root, u64 *objectid);
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+int btrfs_find_highest_objectid(struct btrfs_root *root, u64 *objectid);
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 int __init btrfs_end_io_wq_init(void);
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 void __cold btrfs_end_io_wq_exit(void);
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