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> | |
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> | |
435d5f4b | 11 | #include <linux/ns_common.h> |
aa5a6662 SB |
12 | |
13 | struct pidmap { | |
14 | atomic_t nr_free; | |
15 | void *page; | |
16 | }; | |
17 | ||
5cc54451 RC |
18 | #define BITS_PER_PAGE (PAGE_SIZE * 8) |
19 | #define BITS_PER_PAGE_MASK (BITS_PER_PAGE-1) | |
20 | #define PIDMAP_ENTRIES ((PID_MAX_LIMIT+BITS_PER_PAGE-1)/BITS_PER_PAGE) | |
aa5a6662 | 21 | |
59eda0e0 | 22 | struct fs_pin; |
20fad13a | 23 | |
61a58c6c | 24 | struct pid_namespace { |
9a575a92 CLG |
25 | struct kref kref; |
26 | struct pidmap pidmap[PIDMAP_ENTRIES]; | |
1adfcb03 | 27 | struct rcu_head rcu; |
9a575a92 | 28 | int last_pid; |
c876ad76 | 29 | unsigned int nr_hashed; |
84d73786 | 30 | struct task_struct *child_reaper; |
baf8f0f8 | 31 | struct kmem_cache *pid_cachep; |
caafa432 | 32 | unsigned int level; |
faacbfd3 | 33 | struct pid_namespace *parent; |
07543f5c PE |
34 | #ifdef CONFIG_PROC_FS |
35 | struct vfsmount *proc_mnt; | |
021ada7d | 36 | struct dentry *proc_self; |
0097875b | 37 | struct dentry *proc_thread_self; |
07543f5c | 38 | #endif |
20fad13a | 39 | #ifdef CONFIG_BSD_PROCESS_ACCT |
59eda0e0 | 40 | struct fs_pin *bacct; |
20fad13a | 41 | #endif |
49f4d8b9 | 42 | struct user_namespace *user_ns; |
0a01f2cc | 43 | struct work_struct proc_work; |
dcb0f222 | 44 | kgid_t pid_gid; |
0499680a | 45 | int hide_pid; |
cf3f8921 | 46 | int reboot; /* group exit code if this pidns was rebooted */ |
435d5f4b | 47 | struct ns_common ns; |
3fbc9648 SB |
48 | }; |
49 | ||
61a58c6c | 50 | extern struct pid_namespace init_pid_ns; |
3fbc9648 | 51 | |
c876ad76 EB |
52 | #define PIDNS_HASH_ADDING (1U << 31) |
53 | ||
57d5f66b | 54 | #ifdef CONFIG_PID_NS |
a05f7b15 | 55 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) |
9a575a92 | 56 | { |
b461cc03 PE |
57 | if (ns != &init_pid_ns) |
58 | kref_get(&ns->kref); | |
a05f7b15 | 59 | return ns; |
9a575a92 CLG |
60 | } |
61 | ||
49f4d8b9 EB |
62 | extern struct pid_namespace *copy_pid_ns(unsigned long flags, |
63 | struct user_namespace *user_ns, struct pid_namespace *ns); | |
74bd59bb | 64 | extern void zap_pid_ns_processes(struct pid_namespace *pid_ns); |
cf3f8921 | 65 | extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd); |
bbc2e3ef | 66 | extern void put_pid_ns(struct pid_namespace *ns); |
9a575a92 | 67 | |
57d5f66b EB |
68 | #else /* !CONFIG_PID_NS */ |
69 | #include <linux/err.h> | |
70 | ||
71 | static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) | |
72 | { | |
73 | return ns; | |
74 | } | |
75 | ||
49f4d8b9 EB |
76 | static inline struct pid_namespace *copy_pid_ns(unsigned long flags, |
77 | struct user_namespace *user_ns, struct pid_namespace *ns) | |
57d5f66b EB |
78 | { |
79 | if (flags & CLONE_NEWPID) | |
80 | ns = ERR_PTR(-EINVAL); | |
81 | return ns; | |
82 | } | |
83 | ||
84 | static inline void put_pid_ns(struct pid_namespace *ns) | |
85 | { | |
86 | } | |
87 | ||
74bd59bb PE |
88 | static inline void zap_pid_ns_processes(struct pid_namespace *ns) |
89 | { | |
90 | BUG(); | |
91 | } | |
cf3f8921 DL |
92 | |
93 | static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd) | |
94 | { | |
95 | return 0; | |
96 | } | |
57d5f66b EB |
97 | #endif /* CONFIG_PID_NS */ |
98 | ||
61bce0f1 | 99 | extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk); |
3ae4eed3 AB |
100 | void pidhash_init(void); |
101 | void pidmap_init(void); | |
102 | ||
61a58c6c | 103 | #endif /* _LINUX_PID_NS_H */ |