[Devel] [PATCH vz10 v3 1/2] ve: introduce task_pid_ve_nr

[Aleksei Oladko]

The new helper returns pid in root pidns of VE

v3: used tsk instead of current

Signed-off-by: Aleksei Oladko <aleksey.oladko at virtuozzo.com>
---
 include/linux/ve.h | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/include/linux/ve.h b/include/linux/ve.h
index 37562dff25aa..c040a1e3f4de 100644
--- a/include/linux/ve.h
+++ b/include/linux/ve.h
@@ -21,6 +21,7 @@
 #include <asm/vdso.h>
 #include <linux/time_namespace.h>
 #include <linux/binfmts.h>
+#include <linux/pid.h>
 
 struct nsproxy;
 struct user_namespace;
@@ -191,6 +192,22 @@ static inline struct ve_struct *css_to_ve(struct cgroup_subsys_state *css)
 
 extern struct cgroup_subsys_state *ve_get_init_css(struct ve_struct *ve, int subsys_id);
 
+static inline pid_t task_pid_ve_nr(struct task_struct *tsk)
+{
+	struct nsproxy *ve_ns;
+	pid_t pid;
+
+	rcu_read_lock();
+	ve_ns = rcu_dereference(tsk->task_ve->ve_ns);
+	if (ve_ns)
+		pid = task_pid_nr_ns(tsk, ve_ns->pid_ns_for_children);
+	else
+		pid = task_pid_nr(tsk);
+	rcu_read_unlock();
+
+	return pid;
+}
+
 static inline struct time_namespace *ve_get_time_ns(struct ve_struct *ve)
 {
 	struct nsproxy *ve_ns;
-- 
2.43.0