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77 lines
2.5 KiB
C
77 lines
2.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2021,2023 The FreeBSD Foundation
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*
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* This software was developed by Björn Zeeb under sponsorship from
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* the FreeBSD Foundation.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _LINUXKPI_LINUX_UUID_H
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#define _LINUXKPI_LINUX_UUID_H
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#include <linux/random.h>
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#define UUID_STRING_LEN 36
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#define GUID_INIT(x0_3, x4_5, x6_7, x8, x9, x10, x11, x12, x13, x14, x15) \
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((guid_t) { .x = { \
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[0] = (x0_3) & 0xff, \
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[1] = ((x0_3) >> 8) & 0xff, \
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[2] = ((x0_3) >> 16) & 0xff, \
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[3] = ((x0_3) >> 24) & 0xff, \
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[4] = (x4_5) & 0xff, \
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[5] = ((x4_5) >> 8) & 0xff, \
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[6] = (x6_7) & 0xff, \
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[7] = ((x6_7) >> 8) & 0xff, \
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[8] = (x8), \
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[9] = (x9), \
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[10] = (x10), \
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[11] = (x11), \
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[12] = (x12), \
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[13] = (x13), \
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[14] = (x14), \
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[15] = (x15) \
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}})
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typedef struct {
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char x[16];
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} guid_t;
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static inline void
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guid_gen(guid_t *g)
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{
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get_random_bytes(g, 16);
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g->x[7] = (g->x[7] & 0x0f) | 0x40;
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g->x[8] = (g->x[8] & 0x3f) | 0x80;
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}
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static inline void
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guid_copy(guid_t *dst, const guid_t *src)
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{
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memcpy(dst, src, sizeof(*dst));
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}
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#endif /* _LINUXKPI_LINUX_UUID_H */
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