Initial file dump from open source releaseHEADmaster

1 files changed, 73 insertions, 0 deletions

diff --git a/include/net/cls_cgroup.h b/include/net/cls_cgroup.h
new file mode 100644
index 00000000..0fee0617
--- /dev/null
+++ b/include/net/cls_cgroup.h
@@ -0,0 +1,73 @@
+/*
+ * 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>
+
+#if IS_ENABLED(CONFIG_NET_CLS_CGROUP)
+struct cgroup_cls_state
+{
+	struct cgroup_subsys_state css;
+	u32 classid;
+};
+
+extern void sock_update_classid(struct sock *sk);
+
+#if IS_BUILTIN(CONFIG_NET_CLS_CGROUP)
+static inline u32 task_cls_classid(struct task_struct *p)
+{
+	u32 classid;
+
+	if (in_interrupt())
+		return 0;
+
+	rcu_read_lock();
+	classid = container_of(task_subsys_state(p, net_cls_subsys_id),
+			       struct cgroup_cls_state, css)->classid;
+	rcu_read_unlock();
+
+	return classid;
+}
+#elif IS_MODULE(CONFIG_NET_CLS_CGROUP)
+static inline u32 task_cls_classid(struct task_struct *p)
+{
+	struct cgroup_subsys_state *css;
+	u32 classid = 0;
+
+	if (in_interrupt())
+		return 0;
+
+	rcu_read_lock();
+	css = task_subsys_state(p, net_cls_subsys_id);
+	if (css)
+		classid = container_of(css,
+				       struct cgroup_cls_state, css)->classid;
+	rcu_read_unlock();
+
+	return classid;
+}
+#endif
+#else /* !CGROUP_NET_CLS_CGROUP */
+static inline void sock_update_classid(struct sock *sk)
+{
+}
+
+static inline u32 task_cls_classid(struct task_struct *p)
+{
+	return 0;
+}
+#endif /* CGROUP_NET_CLS_CGROUP */
+#endif  /* _NET_CLS_CGROUP_H */