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 | |
dcb0f222 | 34 | kgid_t pid_gid; |
0499680a | 35 | int hide_pid; |
cf3f8921 | 36 | int reboot; /* group exit code if this pidns was rebooted */ |
3fbc9648 SB |
37 | }; |
38 | ||
61a58c6c | 39 | extern struct pid_namespace init_pid_ns; |
3fbc9648 | 40 | |
57d5f66b | 41 | #ifdef CONFIG_PID_NS |
a05f7b15 | 42 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) |
9a575a92 | 43 | { |
b461cc03 PE |
44 | if (ns != &init_pid_ns) |
45 | kref_get(&ns->kref); | |
a05f7b15 | 46 | return ns; |
9a575a92 CLG |
47 | } |
48 | ||
213dd266 | 49 | extern struct pid_namespace *copy_pid_ns(unsigned long flags, struct pid_namespace *ns); |
9a575a92 | 50 | extern void free_pid_ns(struct kref *kref); |
74bd59bb | 51 | extern void zap_pid_ns_processes(struct pid_namespace *pid_ns); |
cf3f8921 | 52 | extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd); |
9a575a92 CLG |
53 | |
54 | static inline void put_pid_ns(struct pid_namespace *ns) | |
55 | { | |
b461cc03 PE |
56 | if (ns != &init_pid_ns) |
57 | kref_put(&ns->kref, free_pid_ns); | |
9a575a92 CLG |
58 | } |
59 | ||
57d5f66b EB |
60 | #else /* !CONFIG_PID_NS */ |
61 | #include <linux/err.h> | |
62 | ||
63 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) | |
64 | { | |
65 | return ns; | |
66 | } | |
67 | ||
68 | static inline struct pid_namespace * | |
69 | copy_pid_ns(unsigned long flags, struct pid_namespace *ns) | |
70 | { | |
71 | if (flags & CLONE_NEWPID) | |
72 | ns = ERR_PTR(-EINVAL); | |
73 | return ns; | |
74 | } | |
75 | ||
76 | static inline void put_pid_ns(struct pid_namespace *ns) | |
77 | { | |
78 | } | |
79 | ||
74bd59bb PE |
80 | static inline void zap_pid_ns_processes(struct pid_namespace *ns) |
81 | { | |
82 | BUG(); | |
83 | } | |
cf3f8921 DL |
84 | |
85 | static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd) | |
86 | { | |
87 | return 0; | |
88 | } | |
57d5f66b EB |
89 | #endif /* CONFIG_PID_NS */ |
90 | ||
61bce0f1 | 91 | extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk); |
3ae4eed3 AB |
92 | void pidhash_init(void); |
93 | void pidmap_init(void); | |
94 | ||
61a58c6c | 95 | #endif /* _LINUX_PID_NS_H */ |