mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 04:03:58 +08:00
ea16f912a6
When the cls_cgroup module is not loaded, task_cls_classid will return an uninitialised classid instead of zero. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/*
|
|
* cls_cgroup.h Control Group Classifier
|
|
*
|
|
* Authors: Thomas Graf <tgraf@suug.ch>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*
|
|
*/
|
|
|
|
#ifndef _NET_CLS_CGROUP_H
|
|
#define _NET_CLS_CGROUP_H
|
|
|
|
#include <linux/cgroup.h>
|
|
#include <linux/hardirq.h>
|
|
#include <linux/rcupdate.h>
|
|
|
|
#ifdef CONFIG_CGROUPS
|
|
struct cgroup_cls_state
|
|
{
|
|
struct cgroup_subsys_state css;
|
|
u32 classid;
|
|
};
|
|
|
|
#ifdef CONFIG_NET_CLS_CGROUP
|
|
static inline u32 task_cls_classid(struct task_struct *p)
|
|
{
|
|
if (in_interrupt())
|
|
return 0;
|
|
|
|
return container_of(task_subsys_state(p, net_cls_subsys_id),
|
|
struct cgroup_cls_state, css)->classid;
|
|
}
|
|
#else
|
|
extern int net_cls_subsys_id;
|
|
|
|
static inline u32 task_cls_classid(struct task_struct *p)
|
|
{
|
|
int id;
|
|
u32 classid = 0;
|
|
|
|
if (in_interrupt())
|
|
return 0;
|
|
|
|
rcu_read_lock();
|
|
id = rcu_dereference(net_cls_subsys_id);
|
|
if (id >= 0)
|
|
classid = container_of(task_subsys_state(p, id),
|
|
struct cgroup_cls_state, css)->classid;
|
|
rcu_read_unlock();
|
|
|
|
return classid;
|
|
}
|
|
#endif
|
|
#else
|
|
static inline u32 task_cls_classid(struct task_struct *p)
|
|
{
|
|
return 0;
|
|
}
|
|
#endif
|
|
#endif /* _NET_CLS_CGROUP_H */
|