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01: #ifndef __ASM_GENERIC_IPCBUF_H
02: #define __ASM_GENERIC_IPCBUF_H
03: 
04: /*
05:  * The generic ipc64_perm structure:
06:  * Note extra padding because this structure is passed back and forth
07:  * between kernel and user space.
08:  *
09:  * 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: 

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