2 * Definitions of common constant and generic macros of libcryptsetup
4 * Copyright (C) 2009-2023 Red Hat, Inc. All rights reserved.
5 * Copyright (C) 2009-2023 Milan Broz
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
22 #ifndef _LIBCRYPTSETUP_MACROS_H
23 #define _LIBCRYPTSETUP_MACROS_H
25 /* to silent gcc -Wcast-qual for const cast */
26 #define CONST_CAST(x) (x)(uintptr_t)
28 /* to silent clang -Wcast-align when working with byte arrays */
29 #define VOIDP_CAST(x) (x)(void*)
31 #define UNUSED(x) (void)(x)
34 # define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
37 #define BITFIELD_SIZE(BF_PTR) (sizeof(*(BF_PTR)) * 8)
39 #define MOVE_REF(x, y) \
41 __typeof__(x) *_px = &(x), *_py = &(y); \
46 #define FREE_AND_NULL(x) do { free(x); x = NULL; } while (0)
48 #define AT_LEAST(a, b) ({ __typeof__(a) __at_least = (a); (__at_least >= (b))?__at_least:(b); })
51 #define SECTOR_SHIFT 9
52 #define SECTOR_SIZE (1 << SECTOR_SHIFT)
53 #define MAX_SECTOR_SIZE 4096 /* min page size among all platforms */
54 #define ROUND_SECTOR(x) (((x) + SECTOR_SIZE - 1) / SECTOR_SIZE)
56 #define MISALIGNED(a, b) ((a) & ((b) - 1))
57 #define MISALIGNED_4K(a) MISALIGNED((a), 1 << SHIFT_4K)
58 #define MISALIGNED_512(a) MISALIGNED((a), 1 << SECTOR_SHIFT)
59 #define NOTPOW2(a) MISALIGNED((a), (a))
61 #define DEFAULT_DISK_ALIGNMENT 1048576 /* 1MiB */
62 #define DEFAULT_MEM_ALIGNMENT 4096
64 #define DM_UUID_LEN 129
65 #define DM_BY_ID_PREFIX "dm-uuid-"
66 #define DM_BY_ID_PREFIX_LEN 8
67 #define DM_UUID_PREFIX "CRYPT-"
68 #define DM_UUID_PREFIX_LEN 6
70 #endif /* _LIBCRYPTSETUP_MACROS_H */