1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2*4882a593Smuzhiyun #ifndef __ASM_GENERIC_IPCBUF_H 3*4882a593Smuzhiyun #define __ASM_GENERIC_IPCBUF_H 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun #include <linux/posix_types.h> 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun /* 8*4882a593Smuzhiyun * The generic ipc64_perm structure: 9*4882a593Smuzhiyun * Note extra padding because this structure is passed back and forth 10*4882a593Smuzhiyun * between kernel and user space. 11*4882a593Smuzhiyun * 12*4882a593Smuzhiyun * ipc64_perm was originally meant to be architecture specific, but 13*4882a593Smuzhiyun * everyone just ended up making identical copies without specific 14*4882a593Smuzhiyun * optimizations, so we may just as well all use the same one. 15*4882a593Smuzhiyun * 16*4882a593Smuzhiyun * Pad space is left for: 17*4882a593Smuzhiyun * - 32-bit mode_t on architectures that only had 16 bit 18*4882a593Smuzhiyun * - 32-bit seq 19*4882a593Smuzhiyun * - 2 miscellaneous 32-bit values 20*4882a593Smuzhiyun */ 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun struct ipc64_perm { 23*4882a593Smuzhiyun __kernel_key_t key; 24*4882a593Smuzhiyun __kernel_uid32_t uid; 25*4882a593Smuzhiyun __kernel_gid32_t gid; 26*4882a593Smuzhiyun __kernel_uid32_t cuid; 27*4882a593Smuzhiyun __kernel_gid32_t cgid; 28*4882a593Smuzhiyun __kernel_mode_t mode; 29*4882a593Smuzhiyun /* pad if mode_t is u16: */ 30*4882a593Smuzhiyun unsigned char __pad1[4 - sizeof(__kernel_mode_t)]; 31*4882a593Smuzhiyun unsigned short seq; 32*4882a593Smuzhiyun unsigned short __pad2; 33*4882a593Smuzhiyun __kernel_ulong_t __unused1; 34*4882a593Smuzhiyun __kernel_ulong_t __unused2; 35*4882a593Smuzhiyun }; 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun #endif /* __ASM_GENERIC_IPCBUF_H */ 38