proc_ns.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2/*
 3 * procfs namespace bits
 4 */
 5#ifndef _LINUX_PROC_NS_H
 6#define _LINUX_PROC_NS_H
 7
 8#include <linux/nsfs.h>
 9#include <uapi/linux/nsfs.h>
10
11struct pid_namespace;
12struct nsset;
13struct path;
14struct task_struct;
15struct inode;
16
17struct proc_ns_operations {
18	const char *name;
19	const char *real_ns_name;
20	struct ns_common *(*get)(struct task_struct *task);
21	void (*put)(struct ns_common *ns);
22	int (*install)(struct nsset *nsset, struct ns_common *ns);
23	struct user_namespace *(*owner)(struct ns_common *ns);
24	struct ns_common *(*get_parent)(struct ns_common *ns);
25} __randomize_layout;
26
27extern const struct proc_ns_operations netns_operations;
28extern const struct proc_ns_operations utsns_operations;
29extern const struct proc_ns_operations ipcns_operations;
30extern const struct proc_ns_operations pidns_operations;
31extern const struct proc_ns_operations pidns_for_children_operations;
32extern const struct proc_ns_operations userns_operations;
33extern const struct proc_ns_operations mntns_operations;
34extern const struct proc_ns_operations cgroupns_operations;
35extern const struct proc_ns_operations timens_operations;
36extern const struct proc_ns_operations timens_for_children_operations;
37
38/*
39 * We always define these enumerators
40 */
41enum {
42	PROC_IPC_INIT_INO	= IPC_NS_INIT_INO,
43	PROC_UTS_INIT_INO	= UTS_NS_INIT_INO,
44	PROC_USER_INIT_INO	= USER_NS_INIT_INO,
45	PROC_PID_INIT_INO	= PID_NS_INIT_INO,
46	PROC_CGROUP_INIT_INO	= CGROUP_NS_INIT_INO,
47	PROC_TIME_INIT_INO	= TIME_NS_INIT_INO,
48	PROC_NET_INIT_INO	= NET_NS_INIT_INO,
49	PROC_MNT_INIT_INO	= MNT_NS_INIT_INO,
50};
51
52#ifdef CONFIG_PROC_FS
53
54extern int proc_alloc_inum(unsigned int *pino);
55extern void proc_free_inum(unsigned int inum);
56
57#else /* CONFIG_PROC_FS */
58
59static inline int proc_alloc_inum(unsigned int *inum)
60{
61	*inum = 1;
62	return 0;
63}
64static inline void proc_free_inum(unsigned int inum) {}
65
66#endif /* CONFIG_PROC_FS */
67
68#define get_proc_ns(inode) ((struct ns_common *)(inode)->i_private)
69
70#endif /* _LINUX_PROC_NS_H */