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 | 6 | #include <linux/mm.h> |
a27bb332 | 7 | #include <linux/workqueue.h> |
aa5a6662 | 8 | #include <linux/threads.h> |
9a575a92 CLG |
9 | #include <linux/nsproxy.h> |
10 | #include <linux/kref.h> | |
aa5a6662 SB |
11 | |
12 | struct pidmap { | |
13 | atomic_t nr_free; | |
14 | void *page; | |
15 | }; | |
16 | ||
5cc54451 RC |
17 | #define BITS_PER_PAGE (PAGE_SIZE * 8) |
18 | #define BITS_PER_PAGE_MASK (BITS_PER_PAGE-1) | |
19 | #define PIDMAP_ENTRIES ((PID_MAX_LIMIT+BITS_PER_PAGE-1)/BITS_PER_PAGE) | |
aa5a6662 | 20 | |
20fad13a PE |
21 | struct bsd_acct_struct; |
22 | ||
61a58c6c | 23 | struct pid_namespace { |
9a575a92 CLG |
24 | struct kref kref; |
25 | struct pidmap pidmap[PIDMAP_ENTRIES]; | |
1adfcb03 | 26 | struct rcu_head rcu; |
9a575a92 | 27 | int last_pid; |
c876ad76 | 28 | unsigned int nr_hashed; |
84d73786 | 29 | struct task_struct *child_reaper; |
baf8f0f8 | 30 | struct kmem_cache *pid_cachep; |
caafa432 | 31 | unsigned int level; |
faacbfd3 | 32 | struct pid_namespace *parent; |
07543f5c PE |
33 | #ifdef CONFIG_PROC_FS |
34 | struct vfsmount *proc_mnt; | |
021ada7d | 35 | struct dentry *proc_self; |
07543f5c | 36 | #endif |
20fad13a PE |
37 | #ifdef CONFIG_BSD_PROCESS_ACCT |
38 | struct bsd_acct_struct *bacct; | |
39 | #endif | |
49f4d8b9 | 40 | struct user_namespace *user_ns; |
0a01f2cc | 41 | struct work_struct proc_work; |
dcb0f222 | 42 | kgid_t pid_gid; |
0499680a | 43 | int hide_pid; |
cf3f8921 | 44 | int reboot; /* group exit code if this pidns was rebooted */ |
98f842e6 | 45 | unsigned int proc_inum; |
3fbc9648 SB |
46 | }; |
47 | ||
61a58c6c | 48 | extern struct pid_namespace init_pid_ns; |
3fbc9648 | 49 | |
c876ad76 EB |
50 | #define PIDNS_HASH_ADDING (1U << 31) |
51 | ||
57d5f66b | 52 | #ifdef CONFIG_PID_NS |
a05f7b15 | 53 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) |
9a575a92 | 54 | { |
b461cc03 PE |
55 | if (ns != &init_pid_ns) |
56 | kref_get(&ns->kref); | |
a05f7b15 | 57 | return ns; |
9a575a92 CLG |
58 | } |
59 | ||
49f4d8b9 EB |
60 | extern struct pid_namespace *copy_pid_ns(unsigned long flags, |
61 | struct user_namespace *user_ns, struct pid_namespace *ns); | |
74bd59bb | 62 | extern void zap_pid_ns_processes(struct pid_namespace *pid_ns); |
cf3f8921 | 63 | extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd); |
bbc2e3ef | 64 | extern void put_pid_ns(struct pid_namespace *ns); |
9a575a92 | 65 | |
57d5f66b EB |
66 | #else /* !CONFIG_PID_NS */ |
67 | #include <linux/err.h> | |
68 | ||
69 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) | |
70 | { | |
71 | return ns; | |
72 | } | |
73 | ||
49f4d8b9 EB |
74 | static inline struct pid_namespace *copy_pid_ns(unsigned long flags, |
75 | struct user_namespace *user_ns, struct pid_namespace *ns) | |
57d5f66b EB |
76 | { |
77 | if (flags & CLONE_NEWPID) | |
78 | ns = ERR_PTR(-EINVAL); | |
79 | return ns; | |
80 | } | |
81 | ||
82 | static inline void put_pid_ns(struct pid_namespace *ns) | |
83 | { | |
84 | } | |
85 | ||
74bd59bb PE |
86 | static inline void zap_pid_ns_processes(struct pid_namespace *ns) |
87 | { | |
88 | BUG(); | |
89 | } | |
cf3f8921 DL |
90 | |
91 | static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd) | |
92 | { | |
93 | return 0; | |
94 | } | |
57d5f66b EB |
95 | #endif /* CONFIG_PID_NS */ |
96 | ||
61bce0f1 | 97 | extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk); |
3ae4eed3 AB |
98 | void pidhash_init(void); |
99 | void pidmap_init(void); | |
100 | ||
61a58c6c | 101 | #endif /* _LINUX_PID_NS_H */ |