Commit | Line | Data |
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61a58c6c SB |
1 | #ifndef _LINUX_PID_NS_H |
2 | #define _LINUX_PID_NS_H | |
aa5a6662 SB |
3 | |
4 | #include <linux/sched.h> | |
187f1882 | 5 | #include <linux/bug.h> |
aa5a6662 SB |
6 | #include <linux/mm.h> |
7 | #include <linux/threads.h> | |
9a575a92 CLG |
8 | #include <linux/nsproxy.h> |
9 | #include <linux/kref.h> | |
aa5a6662 SB |
10 | |
11 | struct pidmap { | |
12 | atomic_t nr_free; | |
13 | void *page; | |
14 | }; | |
15 | ||
16 | #define PIDMAP_ENTRIES ((PID_MAX_LIMIT + 8*PAGE_SIZE - 1)/PAGE_SIZE/8) | |
17 | ||
20fad13a PE |
18 | struct bsd_acct_struct; |
19 | ||
61a58c6c | 20 | struct pid_namespace { |
9a575a92 CLG |
21 | struct kref kref; |
22 | struct pidmap pidmap[PIDMAP_ENTRIES]; | |
23 | int last_pid; | |
84d73786 | 24 | struct task_struct *child_reaper; |
baf8f0f8 | 25 | struct kmem_cache *pid_cachep; |
caafa432 | 26 | unsigned int level; |
faacbfd3 | 27 | struct pid_namespace *parent; |
07543f5c PE |
28 | #ifdef CONFIG_PROC_FS |
29 | struct vfsmount *proc_mnt; | |
30 | #endif | |
20fad13a PE |
31 | #ifdef CONFIG_BSD_PROCESS_ACCT |
32 | struct bsd_acct_struct *bacct; | |
33 | #endif | |
0499680a VK |
34 | gid_t pid_gid; |
35 | int hide_pid; | |
3fbc9648 SB |
36 | }; |
37 | ||
61a58c6c | 38 | extern struct pid_namespace init_pid_ns; |
3fbc9648 | 39 | |
57d5f66b | 40 | #ifdef CONFIG_PID_NS |
a05f7b15 | 41 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) |
9a575a92 | 42 | { |
b461cc03 PE |
43 | if (ns != &init_pid_ns) |
44 | kref_get(&ns->kref); | |
a05f7b15 | 45 | return ns; |
9a575a92 CLG |
46 | } |
47 | ||
213dd266 | 48 | extern struct pid_namespace *copy_pid_ns(unsigned long flags, struct pid_namespace *ns); |
9a575a92 | 49 | extern void free_pid_ns(struct kref *kref); |
74bd59bb | 50 | extern void zap_pid_ns_processes(struct pid_namespace *pid_ns); |
9a575a92 CLG |
51 | |
52 | static inline void put_pid_ns(struct pid_namespace *ns) | |
53 | { | |
b461cc03 PE |
54 | if (ns != &init_pid_ns) |
55 | kref_put(&ns->kref, free_pid_ns); | |
9a575a92 CLG |
56 | } |
57 | ||
57d5f66b EB |
58 | #else /* !CONFIG_PID_NS */ |
59 | #include <linux/err.h> | |
60 | ||
61 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) | |
62 | { | |
63 | return ns; | |
64 | } | |
65 | ||
66 | static inline struct pid_namespace * | |
67 | copy_pid_ns(unsigned long flags, struct pid_namespace *ns) | |
68 | { | |
69 | if (flags & CLONE_NEWPID) | |
70 | ns = ERR_PTR(-EINVAL); | |
71 | return ns; | |
72 | } | |
73 | ||
74 | static inline void put_pid_ns(struct pid_namespace *ns) | |
75 | { | |
76 | } | |
77 | ||
74bd59bb PE |
78 | |
79 | static inline void zap_pid_ns_processes(struct pid_namespace *ns) | |
80 | { | |
81 | BUG(); | |
82 | } | |
57d5f66b EB |
83 | #endif /* CONFIG_PID_NS */ |
84 | ||
61bce0f1 | 85 | extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk); |
3ae4eed3 AB |
86 | void pidhash_init(void); |
87 | void pidmap_init(void); | |
88 | ||
61a58c6c | 89 | #endif /* _LINUX_PID_NS_H */ |