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| author | Pavel Emelyanov <xemul@openvz.org> | 2007-10-18 23:40:09 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-19 11:53:39 -0700 |
| commit | b461cc03828c743aed6b3855b9ab0d39a9d54ec5 (patch) | |
| tree | b39ff42df1564adf800d9c4a01ba78ed14f8f9a2 /include | |
| parent | 07543f5c75cee744b791cf7716c69571486fe753 (diff) | |
| download | linux-stable-b461cc03828c743aed6b3855b9ab0d39a9d54ec5.tar.gz linux-stable-b461cc03828c743aed6b3855b9ab0d39a9d54ec5.tar.bz2 linux-stable-b461cc03828c743aed6b3855b9ab0d39a9d54ec5.zip | |
pid namespaces: miscellaneous preparations for pid namespaces
* remove pid.h from pid_namespaces.h;
* rework is_(cgroup|global)_init;
* optimize (get|put)_pid_ns for init_pid_ns;
* declare task_child_reaper to return actual reaper.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Cc: Paul Menage <menage@google.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/pid_namespace.h | 10 | ||||
| -rw-r--r-- | include/linux/sched.h | 12 |
2 files changed, 11 insertions, 11 deletions
diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h index 416d4e4ce94e..0135c76c76c6 100644 --- a/include/linux/pid_namespace.h +++ b/include/linux/pid_namespace.h @@ -4,7 +4,6 @@ #include <linux/sched.h> #include <linux/mm.h> #include <linux/threads.h> -#include <linux/pid.h> #include <linux/nsproxy.h> #include <linux/kref.h> @@ -32,7 +31,8 @@ extern struct pid_namespace init_pid_ns; static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns) { - kref_get(&ns->kref); + if (ns != &init_pid_ns) + kref_get(&ns->kref); return ns; } @@ -41,7 +41,8 @@ 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); + if (ns != &init_pid_ns) + kref_put(&ns->kref, free_pid_ns); } static inline struct pid_namespace *task_active_pid_ns(struct task_struct *tsk) @@ -51,7 +52,8 @@ static inline struct pid_namespace *task_active_pid_ns(struct task_struct *tsk) static inline struct task_struct *task_child_reaper(struct task_struct *tsk) { - return init_pid_ns.child_reaper; + BUG_ON(tsk != current); + return tsk->nsproxy->pid_ns->child_reaper; } #endif /* _LINUX_PID_NS_H */ diff --git a/include/linux/sched.h b/include/linux/sched.h index 511cc4549f58..b0bf326143a9 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -1329,19 +1329,17 @@ static inline int pid_alive(struct task_struct *p) * @tsk: Task structure to be checked. * * Check if a task structure is the first user space task the kernel created. - * - * TODO: We should inline this function after some cleanups in pid_namespace.h */ -extern int is_global_init(struct task_struct *tsk); +static inline int is_global_init(struct task_struct *tsk) +{ + return tsk->pid == 1; +} /* * is_container_init: * check whether in the task is init in its own pid namespace. */ -static inline int is_container_init(struct task_struct *tsk) -{ - return tsk->pid == 1; -} +extern int is_container_init(struct task_struct *tsk); extern struct pid *cad_pid; |