The new helper returns pid in root pidns of VE

https://virtuozzo.atlassian.net/browse/VSTOR-119875
Signed-off-by: Aleksei Oladko <[email protected]>

v4: used task_ve guard helpers
---
 include/linux/ve.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/include/linux/ve.h b/include/linux/ve.h
index 0fbc4c45525f..f65f0a49e646 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;
@@ -202,6 +203,24 @@ 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;
+       struct ve_struct *ve = get_task_ve(tsk);
+       pid_t pid;
+
+       rcu_read_lock();
+       ve_ns = rcu_dereference(ve->ve_nsproxy);
+       if (ve_ns)
+               pid = task_pid_nr_ns(tsk, ve_ns->pid_ns_for_children);
+       else
+               pid = task_pid_nr(tsk);
+       rcu_read_unlock();
+       put_ve(ve);
+
+       return pid;
+}
+
 static inline struct time_namespace *ve_get_time_ns(struct ve_struct *ve)
 {
        struct nsproxy *ve_nsproxy;
-- 
2.43.0

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