ipc.h

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#ifndef _LINUX_IPC_H
#define _LINUX_IPC_H

#include <linux/spinlock.h>
#include <linux/uidgid.h>
#include <uapi/linux/ipc.h>

#define IPCMNI 32768  /* <= MAX_INT limit for ipc arrays (including sysctl changes) */

/* used by in-kernel data structures */
struct kern_ipc_perm
{
    spinlock_t  lock;
    int     deleted;
    int     id;
    key_t       key;
    kuid_t      uid;
    kgid_t      gid;
    kuid_t      cuid;
    kgid_t      cgid;
    umode_t     mode; 
    unsigned long   seq;
    void        *security;
};

#endif /* _LINUX_IPC_H */