Commit | Line | Data |
---|---|---|
61a58c6c SB |
1 | #ifndef _LINUX_PID_NS_H |
2 | #define _LINUX_PID_NS_H | |
aa5a6662 SB |
3 | |
4 | #include <linux/sched.h> | |
5 | #include <linux/mm.h> | |
6 | #include <linux/threads.h> | |
9a575a92 CLG |
7 | #include <linux/nsproxy.h> |
8 | #include <linux/kref.h> | |
aa5a6662 SB |
9 | |
10 | struct pidmap { | |
11 | atomic_t nr_free; | |
12 | void *page; | |
13 | }; | |
14 | ||
15 | #define PIDMAP_ENTRIES ((PID_MAX_LIMIT + 8*PAGE_SIZE - 1)/PAGE_SIZE/8) | |
16 | ||
20fad13a PE |
17 | struct bsd_acct_struct; |
18 | ||
61a58c6c | 19 | struct pid_namespace { |
9a575a92 CLG |
20 | struct kref kref; |
21 | struct pidmap pidmap[PIDMAP_ENTRIES]; | |
22 | int last_pid; | |
84d73786 | 23 | struct task_struct *child_reaper; |
baf8f0f8 | 24 | struct kmem_cache *pid_cachep; |
caafa432 | 25 | unsigned int level; |
faacbfd3 | 26 | struct pid_namespace *parent; |
07543f5c PE |
27 | #ifdef CONFIG_PROC_FS |
28 | struct vfsmount *proc_mnt; | |
29 | #endif | |
20fad13a PE |
30 | #ifdef CONFIG_BSD_PROCESS_ACCT |
31 | struct bsd_acct_struct *bacct; | |
32 | #endif | |
0499680a VK |
33 | gid_t pid_gid; |
34 | int hide_pid; | |
3fbc9648 SB |
35 | }; |
36 | ||
61a58c6c | 37 | extern struct pid_namespace init_pid_ns; |
3fbc9648 | 38 | |
57d5f66b | 39 | #ifdef CONFIG_PID_NS |
a05f7b15 | 40 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) |
9a575a92 | 41 | { |
b461cc03 PE |
42 | if (ns != &init_pid_ns) |
43 | kref_get(&ns->kref); | |
a05f7b15 | 44 | return ns; |
9a575a92 CLG |
45 | } |
46 | ||
213dd266 | 47 | extern struct pid_namespace *copy_pid_ns(unsigned long flags, struct pid_namespace *ns); |
9a575a92 | 48 | extern void free_pid_ns(struct kref *kref); |
74bd59bb | 49 | extern void zap_pid_ns_processes(struct pid_namespace *pid_ns); |
9a575a92 CLG |
50 | |
51 | static inline void put_pid_ns(struct pid_namespace *ns) | |
52 | { | |
b461cc03 PE |
53 | if (ns != &init_pid_ns) |
54 | kref_put(&ns->kref, free_pid_ns); | |
9a575a92 CLG |
55 | } |
56 | ||
57d5f66b EB |
57 | #else /* !CONFIG_PID_NS */ |
58 | #include <linux/err.h> | |
59 | ||
60 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) | |
61 | { | |
62 | return ns; | |
63 | } | |
64 | ||
65 | static inline struct pid_namespace * | |
66 | copy_pid_ns(unsigned long flags, struct pid_namespace *ns) | |
67 | { | |
68 | if (flags & CLONE_NEWPID) | |
69 | ns = ERR_PTR(-EINVAL); | |
70 | return ns; | |
71 | } | |
72 | ||
73 | static inline void put_pid_ns(struct pid_namespace *ns) | |
74 | { | |
75 | } | |
76 | ||
74bd59bb PE |
77 | |
78 | static inline void zap_pid_ns_processes(struct pid_namespace *ns) | |
79 | { | |
80 | BUG(); | |
81 | } | |
57d5f66b EB |
82 | #endif /* CONFIG_PID_NS */ |
83 | ||
61bce0f1 | 84 | extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk); |
3ae4eed3 AB |
85 | void pidhash_init(void); |
86 | void pidmap_init(void); | |
87 | ||
61a58c6c | 88 | #endif /* _LINUX_PID_NS_H */ |