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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2#ifndef __ASM_GENERIC_IPCBUF_H3#define __ASM_GENERIC_IPCBUF_H4 5#include <linux/posix_types.h>6 7/*8 * The generic ipc64_perm structure:9 * Note extra padding because this structure is passed back and forth10 * between kernel and user space.11 *12 * ipc64_perm was originally meant to be architecture specific, but13 * everyone just ended up making identical copies without specific14 * optimizations, so we may just as well all use the same one.15 *16 * Pad space is left for:17 * - 32-bit mode_t on architectures that only had 16 bit18 * - 32-bit seq19 * - 2 miscellaneous 32-bit values20 */21 22struct ipc64_perm {23 __kernel_key_t key;24 __kernel_uid32_t uid;25 __kernel_gid32_t gid;26 __kernel_uid32_t cuid;27 __kernel_gid32_t cgid;28 __kernel_mode_t mode;29 /* pad if mode_t is u16: */30 unsigned char __pad1[4 - sizeof(__kernel_mode_t)];31 unsigned short seq;32 unsigned short __pad2;33 __kernel_ulong_t __unused1;34 __kernel_ulong_t __unused2;35};36 37#endif /* __ASM_GENERIC_IPCBUF_H */38