243 	struct extent_buffer *cow;  in btrfs_copy_root()  local
259 	cow = btrfs_alloc_tree_block(trans, root, 0, new_root_objectid,  in btrfs_copy_root()
261 	if (IS_ERR(cow))  in btrfs_copy_root()
262 		return PTR_ERR(cow);  in btrfs_copy_root()
264 	copy_extent_buffer(cow, buf, 0, 0, cow->len);  in btrfs_copy_root()
265 	btrfs_set_header_bytenr(cow, cow->start);  in btrfs_copy_root()
266 	btrfs_set_header_generation(cow, trans->transid);  in btrfs_copy_root()
267 	btrfs_set_header_backref_rev(cow, BTRFS_MIXED_BACKREF_REV);  in btrfs_copy_root()
268 	btrfs_clear_header_flag(cow, BTRFS_HEADER_FLAG_WRITTEN |  in btrfs_copy_root()
271 		btrfs_set_header_flag(cow, BTRFS_HEADER_FLAG_RELOC);  in btrfs_copy_root()
273 		btrfs_set_header_owner(cow, new_root_objectid);  in btrfs_copy_root()
275 	write_extent_buffer(cow, root->fs_info->fsid, btrfs_header_fsid(),  in btrfs_copy_root()
280 		ret = btrfs_inc_ref(trans, root, cow, 1);  in btrfs_copy_root()
282 		ret = btrfs_inc_ref(trans, root, cow, 0);  in btrfs_copy_root()
287 	btrfs_mark_buffer_dirty(cow);  in btrfs_copy_root()
288 	*cow_ret = cow;  in btrfs_copy_root()
980 				       struct extent_buffer *cow,  in update_ref_for_cow()  argument
1041 				ret = btrfs_inc_ref(trans, root, cow, 1);  in update_ref_for_cow()
1049 				ret = btrfs_inc_ref(trans, root, cow, 1);  in update_ref_for_cow()
1051 				ret = btrfs_inc_ref(trans, root, cow, 0);  in update_ref_for_cow()
1068 				ret = btrfs_inc_ref(trans, root, cow, 1);  in update_ref_for_cow()
1070 				ret = btrfs_inc_ref(trans, root, cow, 0);  in update_ref_for_cow()
1101 	struct extent_buffer *cow;  in __btrfs_cow_block()  local
1132 	cow = btrfs_alloc_tree_block(trans, root, parent_start,  in __btrfs_cow_block()
1135 	if (IS_ERR(cow))  in __btrfs_cow_block()
1136 		return PTR_ERR(cow);  in __btrfs_cow_block()
1140 	copy_extent_buffer(cow, buf, 0, 0, cow->len);  in __btrfs_cow_block()
1141 	btrfs_set_header_bytenr(cow, cow->start);  in __btrfs_cow_block()
1142 	btrfs_set_header_generation(cow, trans->transid);  in __btrfs_cow_block()
1143 	btrfs_set_header_backref_rev(cow, BTRFS_MIXED_BACKREF_REV);  in __btrfs_cow_block()
1144 	btrfs_clear_header_flag(cow, BTRFS_HEADER_FLAG_WRITTEN |  in __btrfs_cow_block()
1147 		btrfs_set_header_flag(cow, BTRFS_HEADER_FLAG_RELOC);  in __btrfs_cow_block()
1149 		btrfs_set_header_owner(cow, root->root_key.objectid);  in __btrfs_cow_block()
1151 	write_extent_buffer(cow, root->fs_info->fsid, btrfs_header_fsid(),  in __btrfs_cow_block()
1154 	ret = update_ref_for_cow(trans, root, buf, cow, &last_ref);  in __btrfs_cow_block()
1161 		ret = btrfs_reloc_cow_block(trans, root, buf, cow);  in __btrfs_cow_block()
1174 		extent_buffer_get(cow);  in __btrfs_cow_block()
1175 		tree_mod_log_set_root_pointer(root, cow, 1);  in __btrfs_cow_block()
1176 		rcu_assign_pointer(root->node, cow);  in __btrfs_cow_block()
1192 					cow->start);  in __btrfs_cow_block()
1209 	btrfs_mark_buffer_dirty(cow);  in __btrfs_cow_block()
1210 	*cow_ret = cow;  in __btrfs_cow_block()
2666 		      ins_len, int cow)  in btrfs_search_slot()  argument
2684 	BUG_ON(!cow && ins_len);  in btrfs_search_slot()
2702 	if (!cow)  in btrfs_search_slot()
2705 	if (cow && (p->keep_locks || p->lowest_level))  in btrfs_search_slot()
2764 		if (cow) {  in btrfs_search_slot()