fs/btrfs/extent_map.h

1 /* SPDX-License-Identifier: GPL-2.0 */
9 #define EXTENT_MAP_LAST_BYTE ((u64)-4)
10 #define EXTENT_MAP_HOLE ((u64)-3)
11 #define EXTENT_MAP_INLINE ((u64)-2)
13 #define EXTENT_MAP_DELALLOC ((u64)-1)
20 	/* pre-allocated extent */
28 	/* This em is merged from two or more physically adjacent ems */
47 	 * Generation of the extent map, for merged em it's the highest
48 	 * generation of all merged ems.
49 	 * For non-merged extents, it's from btrfs_file_extent_item::generation.
70 	return !RB_EMPTY_NODE(&em->rb_node);  in extent_map_in_tree()
75 	if (em->start + em->len < em->start)  in extent_map_end()
76 		return (u64)-1;  in extent_map_end()
77 	return em->start + em->len;  in extent_map_end()
82 	if (em->block_start + em->block_len < em->block_start)  in extent_map_block_end()
83 		return (u64)-1;  in extent_map_block_end()
84 	return em->block_start + em->block_len;  in extent_map_block_end()