Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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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 int type;
18 struct ns_common *(*get)(struct task_struct *task);
19 void (*put)(struct ns_common *ns);
20 int (*install)(struct nsproxy *nsproxy, struct ns_common *ns);
21 struct user_namespace *(*owner)(struct ns_common *ns);
22 struct ns_common *(*get_parent)(struct ns_common *ns);
23};
24
25extern const struct proc_ns_operations netns_operations;
26extern const struct proc_ns_operations utsns_operations;
27extern const struct proc_ns_operations ipcns_operations;
28extern const struct proc_ns_operations pidns_operations;
29extern const struct proc_ns_operations userns_operations;
30extern const struct proc_ns_operations mntns_operations;
31extern const struct proc_ns_operations cgroupns_operations;
32
33/*
34 * We always define these enumerators
35 */
36enum {
37 PROC_ROOT_INO = 1,
38 PROC_IPC_INIT_INO = 0xEFFFFFFFU,
39 PROC_UTS_INIT_INO = 0xEFFFFFFEU,
40 PROC_USER_INIT_INO = 0xEFFFFFFDU,
41 PROC_PID_INIT_INO = 0xEFFFFFFCU,
42 PROC_CGROUP_INIT_INO = 0xEFFFFFFBU,
43};
44
45#ifdef CONFIG_PROC_FS
46
47extern int pid_ns_prepare_proc(struct pid_namespace *ns);
48extern void pid_ns_release_proc(struct pid_namespace *ns);
49extern int proc_alloc_inum(unsigned int *pino);
50extern void proc_free_inum(unsigned int inum);
51
52#else /* CONFIG_PROC_FS */
53
54static inline int pid_ns_prepare_proc(struct pid_namespace *ns) { return 0; }
55static inline void pid_ns_release_proc(struct pid_namespace *ns) {}
56
57static inline int proc_alloc_inum(unsigned int *inum)
58{
59 *inum = 1;
60 return 0;
61}
62static inline void proc_free_inum(unsigned int inum) {}
63
64#endif /* CONFIG_PROC_FS */
65
66static inline int ns_alloc_inum(struct ns_common *ns)
67{
68 atomic_long_set(&ns->stashed, 0);
69 return proc_alloc_inum(&ns->inum);
70}
71
72#define ns_free_inum(ns) proc_free_inum((ns)->inum)
73
74extern struct file *proc_ns_fget(int fd);
75#define get_proc_ns(inode) ((struct ns_common *)(inode)->i_private)
76extern void *ns_get_path(struct path *path, struct task_struct *task,
77 const struct proc_ns_operations *ns_ops);
78
79extern int ns_get_name(char *buf, size_t size, struct task_struct *task,
80 const struct proc_ns_operations *ns_ops);
81extern void nsfs_init(void);
82
83#endif /* _LINUX_PROC_NS_H */