File-copy from v4.4.100
This is the result of 'cp' from a linux-stable tree with the 'v4.4.100'
tag checked out (commit 26d6298789e695c9f627ce49a7bbd2286405798a) on
git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Please refer to that tree for all history prior to this point.
Change-Id: I8a9ee2aea93cd29c52c847d0ce33091a73ae6afe
diff --git a/net/sched/sch_ingress.c b/net/sched/sch_ingress.c
new file mode 100644
index 0000000..e7c648f
--- /dev/null
+++ b/net/sched/sch_ingress.c
@@ -0,0 +1,114 @@
+/* net/sched/sch_ingress.c - Ingress qdisc
+ * 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.
+ *
+ * Authors: Jamal Hadi Salim 1999
+ */
+
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/skbuff.h>
+#include <linux/rtnetlink.h>
+
+#include <net/netlink.h>
+#include <net/pkt_sched.h>
+
+static struct Qdisc *ingress_leaf(struct Qdisc *sch, unsigned long arg)
+{
+ return NULL;
+}
+
+static unsigned long ingress_get(struct Qdisc *sch, u32 classid)
+{
+ return TC_H_MIN(classid) + 1;
+}
+
+static unsigned long ingress_bind_filter(struct Qdisc *sch,
+ unsigned long parent, u32 classid)
+{
+ return ingress_get(sch, classid);
+}
+
+static void ingress_put(struct Qdisc *sch, unsigned long cl)
+{
+}
+
+static void ingress_walk(struct Qdisc *sch, struct qdisc_walker *walker)
+{
+}
+
+static struct tcf_proto __rcu **ingress_find_tcf(struct Qdisc *sch,
+ unsigned long cl)
+{
+ struct net_device *dev = qdisc_dev(sch);
+
+ return &dev->ingress_cl_list;
+}
+
+static int ingress_init(struct Qdisc *sch, struct nlattr *opt)
+{
+ net_inc_ingress_queue();
+ sch->flags |= TCQ_F_CPUSTATS;
+
+ return 0;
+}
+
+static void ingress_destroy(struct Qdisc *sch)
+{
+ struct net_device *dev = qdisc_dev(sch);
+
+ tcf_destroy_chain(&dev->ingress_cl_list);
+ net_dec_ingress_queue();
+}
+
+static int ingress_dump(struct Qdisc *sch, struct sk_buff *skb)
+{
+ struct nlattr *nest;
+
+ nest = nla_nest_start(skb, TCA_OPTIONS);
+ if (nest == NULL)
+ goto nla_put_failure;
+
+ return nla_nest_end(skb, nest);
+
+nla_put_failure:
+ nla_nest_cancel(skb, nest);
+ return -1;
+}
+
+static const struct Qdisc_class_ops ingress_class_ops = {
+ .leaf = ingress_leaf,
+ .get = ingress_get,
+ .put = ingress_put,
+ .walk = ingress_walk,
+ .tcf_chain = ingress_find_tcf,
+ .bind_tcf = ingress_bind_filter,
+ .unbind_tcf = ingress_put,
+};
+
+static struct Qdisc_ops ingress_qdisc_ops __read_mostly = {
+ .cl_ops = &ingress_class_ops,
+ .id = "ingress",
+ .init = ingress_init,
+ .destroy = ingress_destroy,
+ .dump = ingress_dump,
+ .owner = THIS_MODULE,
+};
+
+static int __init ingress_module_init(void)
+{
+ return register_qdisc(&ingress_qdisc_ops);
+}
+
+static void __exit ingress_module_exit(void)
+{
+ unregister_qdisc(&ingress_qdisc_ops);
+}
+
+module_init(ingress_module_init);
+module_exit(ingress_module_exit);
+
+MODULE_LICENSE("GPL");