40 void __btrfs_tree_read_lock(struct extent_buffer *eb, enum btrfs_lock_nesting nest)  in __btrfs_tree_read_lock()  argument
47 	down_read_nested(&eb->lock, nest);  in __btrfs_tree_read_lock()
48 	eb->lock_owner = current->pid;  in __btrfs_tree_read_lock()
49 	trace_btrfs_tree_read_lock(eb, start_ns);  in __btrfs_tree_read_lock()
52 void btrfs_tree_read_lock(struct extent_buffer *eb)  in btrfs_tree_read_lock()  argument
54 	__btrfs_tree_read_lock(eb, BTRFS_NESTING_NORMAL);  in btrfs_tree_read_lock()
62 int btrfs_try_tree_read_lock(struct extent_buffer *eb)  in btrfs_try_tree_read_lock()  argument
64 	if (down_read_trylock(&eb->lock)) {  in btrfs_try_tree_read_lock()
65 		eb->lock_owner = current->pid;  in btrfs_try_tree_read_lock()
66 		trace_btrfs_try_tree_read_lock(eb);  in btrfs_try_tree_read_lock()
77 int btrfs_try_tree_write_lock(struct extent_buffer *eb)  in btrfs_try_tree_write_lock()  argument
79 	if (down_write_trylock(&eb->lock)) {  in btrfs_try_tree_write_lock()
80 		eb->lock_owner = current->pid;  in btrfs_try_tree_write_lock()
81 		trace_btrfs_try_tree_write_lock(eb);  in btrfs_try_tree_write_lock()
90 void btrfs_tree_read_unlock(struct extent_buffer *eb)  in btrfs_tree_read_unlock()  argument
92 	trace_btrfs_tree_read_unlock(eb);  in btrfs_tree_read_unlock()
93 	eb->lock_owner = 0;  in btrfs_tree_read_unlock()
94 	up_read(&eb->lock);  in btrfs_tree_read_unlock()
104 void __btrfs_tree_lock(struct extent_buffer *eb, enum btrfs_lock_nesting nest)  in __btrfs_tree_lock()  argument
105 	__acquires(&eb->lock)  in __btrfs_tree_lock()
112 	down_write_nested(&eb->lock, nest);  in __btrfs_tree_lock()
113 	eb->lock_owner = current->pid;  in __btrfs_tree_lock()
114 	trace_btrfs_tree_lock(eb, start_ns);  in __btrfs_tree_lock()
117 void btrfs_tree_lock(struct extent_buffer *eb)  in btrfs_tree_lock()  argument
119 	__btrfs_tree_lock(eb, BTRFS_NESTING_NORMAL);  in btrfs_tree_lock()
125 void btrfs_tree_unlock(struct extent_buffer *eb)  in btrfs_tree_unlock()  argument
127 	trace_btrfs_tree_unlock(eb);  in btrfs_tree_unlock()
128 	eb->lock_owner = 0;  in btrfs_tree_unlock()
129 	up_write(&eb->lock);  in btrfs_tree_unlock()
166 	struct extent_buffer *eb;  in btrfs_lock_root_node()  local
169 		eb = btrfs_root_node(root);  in btrfs_lock_root_node()
170 		btrfs_tree_lock(eb);  in btrfs_lock_root_node()
171 		if (eb == root->node)  in btrfs_lock_root_node()
173 		btrfs_tree_unlock(eb);  in btrfs_lock_root_node()
174 		free_extent_buffer(eb);  in btrfs_lock_root_node()
176 	return eb;  in btrfs_lock_root_node()
187 	struct extent_buffer *eb;  in btrfs_read_lock_root_node()  local
190 		eb = btrfs_root_node(root);  in btrfs_read_lock_root_node()
191 		btrfs_tree_read_lock(eb);  in btrfs_read_lock_root_node()
192 		if (eb == root->node)  in btrfs_read_lock_root_node()
194 		btrfs_tree_read_unlock(eb);  in btrfs_read_lock_root_node()
195 		free_extent_buffer(eb);  in btrfs_read_lock_root_node()
197 	return eb;  in btrfs_read_lock_root_node()