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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; | |
c876ad76 | 24 | unsigned int nr_hashed; |
84d73786 | 25 | struct task_struct *child_reaper; |
baf8f0f8 | 26 | struct kmem_cache *pid_cachep; |
caafa432 | 27 | unsigned int level; |
faacbfd3 | 28 | struct pid_namespace *parent; |
07543f5c PE |
29 | #ifdef CONFIG_PROC_FS |
30 | struct vfsmount *proc_mnt; | |
31 | #endif | |
20fad13a PE |
32 | #ifdef CONFIG_BSD_PROCESS_ACCT |
33 | struct bsd_acct_struct *bacct; | |
34 | #endif | |
49f4d8b9 | 35 | struct user_namespace *user_ns; |
0a01f2cc | 36 | struct work_struct proc_work; |
dcb0f222 | 37 | kgid_t pid_gid; |
0499680a | 38 | int hide_pid; |
cf3f8921 | 39 | int reboot; /* group exit code if this pidns was rebooted */ |
98f842e6 | 40 | unsigned int proc_inum; |
3fbc9648 SB |
41 | }; |
42 | ||
61a58c6c | 43 | extern struct pid_namespace init_pid_ns; |
3fbc9648 | 44 | |
c876ad76 EB |
45 | #define PIDNS_HASH_ADDING (1U << 31) |
46 | ||
57d5f66b | 47 | #ifdef CONFIG_PID_NS |
a05f7b15 | 48 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) |
9a575a92 | 49 | { |
b461cc03 PE |
50 | if (ns != &init_pid_ns) |
51 | kref_get(&ns->kref); | |
a05f7b15 | 52 | return ns; |
9a575a92 CLG |
53 | } |
54 | ||
49f4d8b9 EB |
55 | extern struct pid_namespace *copy_pid_ns(unsigned long flags, |
56 | struct user_namespace *user_ns, struct pid_namespace *ns); | |
74bd59bb | 57 | extern void zap_pid_ns_processes(struct pid_namespace *pid_ns); |
cf3f8921 | 58 | extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd); |
bbc2e3ef | 59 | extern void put_pid_ns(struct pid_namespace *ns); |
9a575a92 | 60 | |
57d5f66b EB |
61 | #else /* !CONFIG_PID_NS */ |
62 | #include <linux/err.h> | |
63 | ||
64 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) | |
65 | { | |
66 | return ns; | |
67 | } | |
68 | ||
49f4d8b9 EB |
69 | static inline struct pid_namespace *copy_pid_ns(unsigned long flags, |
70 | struct user_namespace *user_ns, struct pid_namespace *ns) | |
57d5f66b EB |
71 | { |
72 | if (flags & CLONE_NEWPID) | |
73 | ns = ERR_PTR(-EINVAL); | |
74 | return ns; | |
75 | } | |
76 | ||
77 | static inline void put_pid_ns(struct pid_namespace *ns) | |
78 | { | |
79 | } | |
80 | ||
74bd59bb PE |
81 | static inline void zap_pid_ns_processes(struct pid_namespace *ns) |
82 | { | |
83 | BUG(); | |
84 | } | |
cf3f8921 DL |
85 | |
86 | static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd) | |
87 | { | |
88 | return 0; | |
89 | } | |
57d5f66b EB |
90 | #endif /* CONFIG_PID_NS */ |
91 | ||
61bce0f1 | 92 | extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk); |
3ae4eed3 AB |
93 | void pidhash_init(void); |
94 | void pidmap_init(void); | |
95 | ||
61a58c6c | 96 | #endif /* _LINUX_PID_NS_H */ |