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 	__kernel_ulong_t	__unused1;
31 	__kernel_ulong_t	__unused2;
32 };
33 
34 #endif /* __ASM_GENERIC_IPCBUF_H */
35