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sock_update_classid() assumes that the update operation always are applied on the current task. sock_update_classid() needs to know on which tasks to work on in order to be able to migrate task between cgroups using the struct cgroup_subsys attach() callback. Signed-off-by: Daniel Wagner <daniel.wagner@bmw-carit.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Eric Dumazet <edumazet@google.com> Cc: Glauber Costa <glommer@parallels.com> Cc: Joe Perches <joe@perches.com> Cc: Neil Horman <nhorman@tuxdriver.com> Cc: Stanislav Kinsbursky <skinsbursky@parallels.com> Cc: Tejun Heo <tj@kernel.org> Cc: <netdev@vger.kernel.org> Cc: <cgroups@vger.kernel.org> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
74 lines
1.6 KiB
C
74 lines
1.6 KiB
C
/*
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* cls_cgroup.h Control Group Classifier
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*
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* Authors: Thomas Graf <tgraf@suug.ch>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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*/
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#ifndef _NET_CLS_CGROUP_H
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#define _NET_CLS_CGROUP_H
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#include <linux/cgroup.h>
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#include <linux/hardirq.h>
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#include <linux/rcupdate.h>
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#if IS_ENABLED(CONFIG_NET_CLS_CGROUP)
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struct cgroup_cls_state
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{
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struct cgroup_subsys_state css;
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u32 classid;
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};
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extern void sock_update_classid(struct sock *sk, struct task_struct *task);
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#if IS_BUILTIN(CONFIG_NET_CLS_CGROUP)
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static inline u32 task_cls_classid(struct task_struct *p)
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{
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u32 classid;
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if (in_interrupt())
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return 0;
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rcu_read_lock();
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classid = container_of(task_subsys_state(p, net_cls_subsys_id),
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struct cgroup_cls_state, css)->classid;
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rcu_read_unlock();
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return classid;
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}
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#elif IS_MODULE(CONFIG_NET_CLS_CGROUP)
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static inline u32 task_cls_classid(struct task_struct *p)
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{
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struct cgroup_subsys_state *css;
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u32 classid = 0;
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if (in_interrupt())
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return 0;
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rcu_read_lock();
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css = task_subsys_state(p, net_cls_subsys_id);
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if (css)
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classid = container_of(css,
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struct cgroup_cls_state, css)->classid;
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rcu_read_unlock();
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return classid;
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}
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#endif
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#else /* !CGROUP_NET_CLS_CGROUP */
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static inline void sock_update_classid(struct sock *sk)
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{
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}
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static inline u32 task_cls_classid(struct task_struct *p)
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{
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return 0;
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}
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#endif /* CGROUP_NET_CLS_CGROUP */
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#endif /* _NET_CLS_CGROUP_H */
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