/* SPDX-License-Identifier: GPL-2.0 */ /* * Copyright (C) 2008 Oracle. All rights reserved. */ #ifndef BTRFS_LOCKING_H #define BTRFS_LOCKING_H #define BTRFS_WRITE_LOCK 1 #define BTRFS_READ_LOCK 2 #define BTRFS_WRITE_LOCK_BLOCKING 3 #define BTRFS_READ_LOCK_BLOCKING 4 void btrfs_tree_lock(struct extent_buffer *eb); void btrfs_tree_unlock(struct extent_buffer *eb); void btrfs_tree_read_lock(struct extent_buffer *eb); void btrfs_tree_read_unlock(struct extent_buffer *eb); void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb); void btrfs_set_lock_blocking_rw(struct extent_buffer *eb, int rw); void btrfs_clear_lock_blocking_rw(struct extent_buffer *eb, int rw); void btrfs_assert_tree_locked(struct extent_buffer *eb); int btrfs_try_tree_read_lock(struct extent_buffer *eb); int btrfs_try_tree_write_lock(struct extent_buffer *eb); int btrfs_tree_read_lock_atomic(struct extent_buffer *eb); static inline void btrfs_tree_unlock_rw(struct extent_buffer *eb, int rw) { if (rw == BTRFS_WRITE_LOCK || rw == BTRFS_WRITE_LOCK_BLOCKING) btrfs_tree_unlock(eb); else if (rw == BTRFS_READ_LOCK_BLOCKING) btrfs_tree_read_unlock_blocking(eb); else if (rw == BTRFS_READ_LOCK) btrfs_tree_read_unlock(eb); else BUG(); } static inline void btrfs_set_lock_blocking(struct extent_buffer *eb) { btrfs_set_lock_blocking_rw(eb, BTRFS_WRITE_LOCK); } static inline void btrfs_clear_lock_blocking(struct extent_buffer *eb) { btrfs_clear_lock_blocking_rw(eb, BTRFS_WRITE_LOCK_BLOCKING); } #endif