include/linux/mnt_namespace.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49

#ifndef _NAMESPACE_H_
#define _NAMESPACE_H_
#ifdef __KERNEL__

#include <linux/mount.h>
#include <linux/sched.h>
#include <linux/nsproxy.h>
#include <linux/seq_file.h>

struct mnt_namespace {
	atomic_t		count;
	struct vfsmount *	root;
	struct list_head	list;
	wait_queue_head_t poll;
	int event;
};

struct proc_mounts {
	struct seq_file m; /* must be the first element */
	struct mnt_namespace *ns;
	struct path root;
	int event;
};

struct fs_struct;

extern struct mnt_namespace *create_mnt_ns(struct vfsmount *mnt);
extern struct mnt_namespace *copy_mnt_ns(unsigned long, struct mnt_namespace *,
		struct fs_struct *);
extern void put_mnt_ns(struct mnt_namespace *ns);

static inline void exit_mnt_ns(struct task_struct *p)
{
	struct mnt_namespace *ns = p->nsproxy->mnt_ns;
	if (ns)
		put_mnt_ns(ns);
}

static inline void get_mnt_ns(struct mnt_namespace *ns)
{
	atomic_inc(&ns->count);
}

extern const struct seq_operations mounts_op;
extern const struct seq_operations mountinfo_op;
extern const struct seq_operations mountstats_op;

#endif
#endif