Root/include/asm-generic/ipcbuf.h

1#ifndef __ASM_GENERIC_IPCBUF_H
2#define __ASM_GENERIC_IPCBUF_H
3
4/*
5 * The generic ipc64_perm structure:
6 * Note extra padding because this structure is passed back and forth
7 * between kernel and user space.
8 *
9 * ipc64_perm was originally meant to be architecture specific, but
10 * everyone just ended up making identical copies without specific
11 * optimizations, so we may just as well all use the same one.
12 *
13 * Pad space is left for:
14 * - 32-bit mode_t on architectures that only had 16 bit
15 * - 32-bit seq
16 * - 2 miscellaneous 32-bit values
17 */
18
19struct ipc64_perm {
20    __kernel_key_t key;
21    __kernel_uid32_t uid;
22    __kernel_gid32_t gid;
23    __kernel_uid32_t cuid;
24    __kernel_gid32_t cgid;
25    __kernel_mode_t mode;
26                /* pad if mode_t is u16: */
27    unsigned char __pad1[4 - sizeof(__kernel_mode_t)];
28    unsigned short seq;
29    unsigned short __pad2;
30    unsigned long __unused1;
31    unsigned long __unused2;
32};
33
34#endif /* __ASM_GENERIC_IPCBUF_H */
35

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