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| author | David Woodhouse <dwmw2@infradead.org> | 2007-01-18 02:34:51 +0300 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2007-01-18 02:34:51 +0300 |
| commit | 9cdf083f981b8d37b3212400a359368661385099 (patch) | |
| tree | aa15a6a08ad87e650dea40fb59b3180bef0d345b /include/linux/pid_namespace.h | |
| parent | e499e01d234a31d59679b7b1e1cf628d917ba49a (diff) | |
| parent | a8b3485287731978899ced11f24628c927890e78 (diff) | |
| download | linux-9cdf083f981b8d37b3212400a359368661385099.tar.xz | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Diffstat (limited to 'include/linux/pid_namespace.h')
| -rw-r--r-- | include/linux/pid_namespace.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h new file mode 100644 index 000000000000..d2a9d419f01f --- /dev/null +++ b/include/linux/pid_namespace.h @@ -0,0 +1,45 @@ +#ifndef _LINUX_PID_NS_H +#define _LINUX_PID_NS_H + +#include <linux/sched.h> +#include <linux/mm.h> +#include <linux/threads.h> +#include <linux/pid.h> +#include <linux/nsproxy.h> +#include <linux/kref.h> + +struct pidmap { + atomic_t nr_free; + void *page; +}; + +#define PIDMAP_ENTRIES ((PID_MAX_LIMIT + 8*PAGE_SIZE - 1)/PAGE_SIZE/8) + +struct pid_namespace { + struct kref kref; + struct pidmap pidmap[PIDMAP_ENTRIES]; + int last_pid; + struct task_struct *child_reaper; +}; + +extern struct pid_namespace init_pid_ns; + +static inline void get_pid_ns(struct pid_namespace *ns) +{ + kref_get(&ns->kref); +} + +extern int copy_pid_ns(int flags, struct task_struct *tsk); +extern void free_pid_ns(struct kref *kref); + +static inline void put_pid_ns(struct pid_namespace *ns) +{ + kref_put(&ns->kref, free_pid_ns); +} + +static inline struct task_struct *child_reaper(struct task_struct *tsk) +{ + return tsk->nsproxy->pid_ns->child_reaper; +} + +#endif /* _LINUX_PID_NS_H */ |