Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1/*
2 * procfs namespace bits
3 */
4#ifndef _LINUX_PROC_NS_H
5#define _LINUX_PROC_NS_H
6
7#include <linux/ns_common.h>
8
9struct pid_namespace;
10struct nsproxy;
11struct path;
12struct task_struct;
13struct inode;
14
15struct proc_ns_operations {
16 const char *name;
17 const char *real_ns_name;
18 int type;
19 struct ns_common *(*get)(struct task_struct *task);
20 void (*put)(struct ns_common *ns);
21 int (*install)(struct nsproxy *nsproxy, struct ns_common *ns);
22 struct user_namespace *(*owner)(struct ns_common *ns);
23 struct ns_common *(*get_parent)(struct ns_common *ns);
24} __randomize_layout;
25
26extern const struct proc_ns_operations netns_operations;
27extern const struct proc_ns_operations utsns_operations;
28extern const struct proc_ns_operations ipcns_operations;
29extern const struct proc_ns_operations pidns_operations;
30extern const struct proc_ns_operations pidns_for_children_operations;
31extern const struct proc_ns_operations userns_operations;
32extern const struct proc_ns_operations mntns_operations;
33extern const struct proc_ns_operations cgroupns_operations;
34
35/*
36 * We always define these enumerators
37 */
38enum {
39 PROC_ROOT_INO = 1,
40 PROC_IPC_INIT_INO = 0xEFFFFFFFU,
41 PROC_UTS_INIT_INO = 0xEFFFFFFEU,
42 PROC_USER_INIT_INO = 0xEFFFFFFDU,
43 PROC_PID_INIT_INO = 0xEFFFFFFCU,
44 PROC_CGROUP_INIT_INO = 0xEFFFFFFBU,
45};
46
47#ifdef CONFIG_PROC_FS
48
49extern int pid_ns_prepare_proc(struct pid_namespace *ns);
50extern void pid_ns_release_proc(struct pid_namespace *ns);
51extern int proc_alloc_inum(unsigned int *pino);
52extern void proc_free_inum(unsigned int inum);
53
54#else /* CONFIG_PROC_FS */
55
56static inline int pid_ns_prepare_proc(struct pid_namespace *ns) { return 0; }
57static inline void pid_ns_release_proc(struct pid_namespace *ns) {}
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
68static inline int ns_alloc_inum(struct ns_common *ns)
69{
70 atomic_long_set(&ns->stashed, 0);
71 return proc_alloc_inum(&ns->inum);
72}
73
74#define ns_free_inum(ns) proc_free_inum((ns)->inum)
75
76extern struct file *proc_ns_fget(int fd);
77#define get_proc_ns(inode) ((struct ns_common *)(inode)->i_private)
78extern void *ns_get_path(struct path *path, struct task_struct *task,
79 const struct proc_ns_operations *ns_ops);
80
81extern int ns_get_name(char *buf, size_t size, struct task_struct *task,
82 const struct proc_ns_operations *ns_ops);
83extern void nsfs_init(void);
84
85#endif /* _LINUX_PROC_NS_H */