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6b3286ed KK |
1 | #ifndef _NAMESPACE_H_ |
2 | #define _NAMESPACE_H_ | |
3 | #ifdef __KERNEL__ | |
4 | ||
5 | #include <linux/mount.h> | |
6 | #include <linux/sched.h> | |
7 | #include <linux/nsproxy.h> | |
a1a2c409 | 8 | #include <linux/seq_file.h> |
6b3286ed KK |
9 | |
10 | struct mnt_namespace { | |
11 | atomic_t count; | |
12 | struct vfsmount * root; | |
13 | struct list_head list; | |
14 | wait_queue_head_t poll; | |
15 | int event; | |
16 | }; | |
17 | ||
a1a2c409 MS |
18 | struct proc_mounts { |
19 | struct seq_file m; /* must be the first element */ | |
20 | struct mnt_namespace *ns; | |
21 | struct path root; | |
22 | int event; | |
23 | }; | |
24 | ||
213dd266 | 25 | extern struct mnt_namespace *copy_mnt_ns(unsigned long, struct mnt_namespace *, |
6b3286ed | 26 | struct fs_struct *); |
e3222c4e | 27 | extern void __put_mnt_ns(struct mnt_namespace *ns); |
6b3286ed KK |
28 | |
29 | static inline void put_mnt_ns(struct mnt_namespace *ns) | |
30 | { | |
31 | if (atomic_dec_and_lock(&ns->count, &vfsmount_lock)) | |
32 | /* releases vfsmount_lock */ | |
33 | __put_mnt_ns(ns); | |
34 | } | |
35 | ||
36 | static inline void exit_mnt_ns(struct task_struct *p) | |
37 | { | |
38 | struct mnt_namespace *ns = p->nsproxy->mnt_ns; | |
39 | if (ns) | |
40 | put_mnt_ns(ns); | |
41 | } | |
42 | ||
43 | static inline void get_mnt_ns(struct mnt_namespace *ns) | |
44 | { | |
45 | atomic_inc(&ns->count); | |
46 | } | |
47 | ||
a1a2c409 | 48 | extern const struct seq_operations mounts_op; |
2d4d4864 | 49 | extern const struct seq_operations mountinfo_op; |
a1a2c409 MS |
50 | extern const struct seq_operations mountstats_op; |
51 | ||
6b3286ed KK |
52 | #endif |
53 | #endif |