include/linux/ipc.h

   1 #ifndef _LINUX_IPC_H
   2 #define _LINUX_IPC_H
   3
   4 #include <linux/spinlock.h>
   5 #include <linux/uidgid.h>
   6 #include <uapi/linux/ipc.h>
   7
   8 #define IPCMNI 32768  /* <= MAX_INT limit for ipc arrays (including sysctl changes) */
   9
  10 /* used by in-kernel data structures */
  11 struct kern_ipc_perm {
  12         spinlock_t      lock;
  13         bool            deleted;
  14         int             id;
  15         key_t           key;
  16         kuid_t          uid;
  17         kgid_t          gid;
  18         kuid_t          cuid;
  19         kgid_t          cgid;
  20         umode_t         mode;
  21         unsigned long   seq;
  22         void            *security;
  23
  24         struct rcu_head rcu;
  25         atomic_t refcount;
  26 } ____cacheline_aligned_in_smp;
  27
  28 #endif /* _LINUX_IPC_H */