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| author |   Leo Yan <leo.yan@linaro.org> | 2022-01-26 13:04:26 +0800 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2022-01-26 18:57:09 -0800 |
| commit | d7e4f8545b497b3f5687e592f1c355cbaee64c8c (patch) | |
| tree | c45d21ee9942d90a12a7e361a092053c480c73b5 /include/linux/pid_namespace.h | |
| parent | gve: Fix GFP flags when allocing pages (diff) | |
| download | wireguard-linux-d7e4f8545b497b3f5687e592f1c355cbaee64c8c.tar.xz wireguard-linux-d7e4f8545b497b3f5687e592f1c355cbaee64c8c.zip | |
pid: Introduce helper task_is_in_init_pid_ns()
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_init_pid_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>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Acked-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux/pid_namespace.h')
| -rw-r--r-- | include/linux/pid_namespace.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/pid_namespace.h b/include/linux/pid_namespace.h index 7c7e627503d2..07481bb87d4e 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_init_pid_ns(struct task_struct *tsk) +{ + return task_active_pid_ns(tsk) == &init_pid_ns; +} + #endif /* _LINUX_PID_NS_H */ |