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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: 19: struct 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: