1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_IPC_H
3 #define _LINUX_IPC_H
4 
5 #include <linux/spinlock_types.h>
6 #include <linux/uidgid.h>
7 #include <linux/rhashtable-types.h>
8 #include <uapi/linux/ipc.h>
9 #include <linux/refcount.h>
10 
11 /* used by in-kernel data structures */
12 struct kern_ipc_perm {
13 	spinlock_t	lock;
14 	bool		deleted;
15 	int		id;
16 	key_t		key;
17 	kuid_t		uid;
18 	kgid_t		gid;
19 	kuid_t		cuid;
20 	kgid_t		cgid;
21 	umode_t		mode;
22 	unsigned long	seq;
23 	void		*security;
24 
25 	struct rhash_head khtnode;
26 
27 	struct rcu_head rcu;
28 	refcount_t refcount;
29 } ____cacheline_aligned_in_smp __randomize_layout;
30 
31 #endif /* _LINUX_IPC_H */
32