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 <linux/rhashtable.h>
   7 #include <uapi/linux/ipc.h>
   8 #include <linux/refcount.h>
   9
  10 #define IPCMNI 32768  /* <= MAX_INT limit for ipc arrays (including sysctl changes) */
  11
  12 /* used by in-kernel data structures */
  13 struct kern_ipc_perm {
  14         spinlock_t      lock;
  15         bool            deleted;
  16         int             id;
  17         key_t           key;
  18         kuid_t          uid;
  19         kgid_t          gid;
  20         kuid_t          cuid;
  21         kgid_t          cgid;
  22         umode_t         mode;
  23         unsigned long   seq;
  24         void            *security;
  25
  26         struct rhash_head khtnode;
  27
  28         struct rcu_head rcu;
  29         refcount_t refcount;
  30 } ____cacheline_aligned_in_smp __randomize_layout;
  31
  32 #endif /* _LINUX_IPC_H */