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![Daniel Borkmann](/assets/img/avatar_default.png)
Zefan Li requested [1] to perform the following cleanup/refactoring: - Split cgroupfs classid handling into net core to better express a possible more generic use. - Disable module support for cgroupfs bits as the majority of other cgroupfs subsystems do not have that, and seems to be not wished from cgroup side. Zefan probably might want to follow-up for netprio later on. - By this, code can be further reduced which previously took care of functionality built when compiled as module. cgroupfs bits are being placed under net/core/netclassid_cgroup.c, so that we are consistent with {netclassid,netprio}_cgroup naming that is under net/core/ as suggested by Zefan. No change in functionality, but only code refactoring that is being done here. [1] http://patchwork.ozlabs.org/patch/304825/ Suggested-by: Li Zefan <lizefan@huawei.com> Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Zefan Li <lizefan@huawei.com> Cc: Thomas Graf <tgraf@suug.ch> Cc: cgroups@vger.kernel.org Acked-by: Li Zefan <lizefan@huawei.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
57 lines
1.3 KiB
C
57 lines
1.3 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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#include <net/sock.h>
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#ifdef CONFIG_CGROUP_NET_CLASSID
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struct cgroup_cls_state {
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struct cgroup_subsys_state css;
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u32 classid;
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};
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struct cgroup_cls_state *task_cls_state(struct task_struct *p);
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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_css(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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static inline void sock_update_classid(struct sock *sk)
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{
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u32 classid;
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classid = task_cls_classid(current);
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if (classid != sk->sk_classid)
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sk->sk_classid = classid;
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}
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#else /* !CONFIG_CGROUP_NET_CLASSID */
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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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#endif /* CONFIG_CGROUP_NET_CLASSID */
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#endif /* _NET_CLS_CGROUP_H */
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