Messages in this thread | | | Date | Mon, 6 Dec 2021 08:49:01 +0200 | From | Leon Romanovsky <> | Subject | Re: [PATCH v1 1/7] pid: Introduce helper task_is_in_root_ns() |
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On Sun, Dec 05, 2021 at 10:50:59PM +0800, Leo Yan wrote: > Currently the kernel uses open code in multiple places to check if a > task is in the root PID namespace with the kind of format: > > if (task_active_pid_ns(current) == &init_pid_ns) > do_something(); > > This patch creates a new helper function, task_is_in_root_ns(), it > returns true if a passed task is in the root PID namespace, otherwise > returns false. So it will be used to replace open codes. > > Suggested-by: Suzuki K Poulose <suzuki.poulose@arm.com> > Signed-off-by: Leo Yan <leo.yan@linaro.org> > --- > include/linux/pid_namespace.h | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h > index 7c7e627503d2..bf82b373f022 100644 > --- a/include/linux/pid_namespace.h > +++ b/include/linux/pid_namespace.h > @@ -86,4 +86,9 @@ extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk); > void pidhash_init(void); > void pid_idr_init(void); > > +static inline bool task_is_in_root_ns(struct task_struct *tsk)
It is bad that this name doesn't reflect PID nature of this namespace. Won't it better to name it task_is_in_init_pid_ns()?
Thanks
> +{ > + return task_active_pid_ns(tsk) == &init_pid_ns; > +} > + > #endif /* _LINUX_PID_NS_H */ > -- > 2.25.1 >
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