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![Patrick McHardy](/assets/img/avatar_default.png)
Since the old policer code is gone, TC actions are needed for policing. The ingress qdisc can get packets directly from netif_receive_skb() in case TC actions are enabled or through netfilter otherwise, but since without TC actions there is no policer the only thing it actually does is count packets. Remove the netfilter support and always require TC actions. Signed-off-by: Patrick McHardy <kaber@trash.net> Acked-by: Jamal Hadi Salim <hadi@cyberus.ca> Signed-off-by: David S. Miller <davem@davemloft.net>
159 lines
3.5 KiB
C
159 lines
3.5 KiB
C
/* net/sched/sch_ingress.c - Ingress qdisc
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*
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* Authors: Jamal Hadi Salim 1999
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/list.h>
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#include <linux/skbuff.h>
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#include <linux/rtnetlink.h>
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#include <net/netlink.h>
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#include <net/pkt_sched.h>
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struct ingress_qdisc_data {
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struct tcf_proto *filter_list;
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};
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/* ------------------------- Class/flow operations ------------------------- */
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static int ingress_graft(struct Qdisc *sch, unsigned long arg,
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struct Qdisc *new, struct Qdisc **old)
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{
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return -EOPNOTSUPP;
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}
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static struct Qdisc *ingress_leaf(struct Qdisc *sch, unsigned long arg)
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{
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return NULL;
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}
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static unsigned long ingress_get(struct Qdisc *sch, u32 classid)
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{
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return TC_H_MIN(classid) + 1;
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}
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static unsigned long ingress_bind_filter(struct Qdisc *sch,
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unsigned long parent, u32 classid)
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{
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return ingress_get(sch, classid);
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}
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static void ingress_put(struct Qdisc *sch, unsigned long cl)
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{
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}
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static int ingress_change(struct Qdisc *sch, u32 classid, u32 parent,
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struct nlattr **tca, unsigned long *arg)
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{
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return 0;
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}
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static void ingress_walk(struct Qdisc *sch, struct qdisc_walker *walker)
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{
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return;
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}
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static struct tcf_proto **ingress_find_tcf(struct Qdisc *sch, unsigned long cl)
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{
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struct ingress_qdisc_data *p = qdisc_priv(sch);
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return &p->filter_list;
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}
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/* --------------------------- Qdisc operations ---------------------------- */
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static int ingress_enqueue(struct sk_buff *skb, struct Qdisc *sch)
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{
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struct ingress_qdisc_data *p = qdisc_priv(sch);
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struct tcf_result res;
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int result;
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result = tc_classify(skb, p->filter_list, &res);
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sch->bstats.packets++;
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sch->bstats.bytes += skb->len;
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switch (result) {
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case TC_ACT_SHOT:
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result = TC_ACT_SHOT;
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sch->qstats.drops++;
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break;
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case TC_ACT_STOLEN:
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case TC_ACT_QUEUED:
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result = TC_ACT_STOLEN;
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break;
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case TC_ACT_RECLASSIFY:
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case TC_ACT_OK:
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skb->tc_index = TC_H_MIN(res.classid);
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default:
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result = TC_ACT_OK;
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break;
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}
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return result;
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}
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/* ------------------------------------------------------------- */
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static void ingress_destroy(struct Qdisc *sch)
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{
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struct ingress_qdisc_data *p = qdisc_priv(sch);
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tcf_destroy_chain(p->filter_list);
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}
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static int ingress_dump(struct Qdisc *sch, struct sk_buff *skb)
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{
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struct nlattr *nest;
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nest = nla_nest_start(skb, TCA_OPTIONS);
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if (nest == NULL)
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goto nla_put_failure;
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nla_nest_end(skb, nest);
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return skb->len;
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nla_put_failure:
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nla_nest_cancel(skb, nest);
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return -1;
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}
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static const struct Qdisc_class_ops ingress_class_ops = {
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.graft = ingress_graft,
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.leaf = ingress_leaf,
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.get = ingress_get,
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.put = ingress_put,
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.change = ingress_change,
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.walk = ingress_walk,
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.tcf_chain = ingress_find_tcf,
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.bind_tcf = ingress_bind_filter,
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.unbind_tcf = ingress_put,
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};
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static struct Qdisc_ops ingress_qdisc_ops __read_mostly = {
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.cl_ops = &ingress_class_ops,
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.id = "ingress",
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.priv_size = sizeof(struct ingress_qdisc_data),
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.enqueue = ingress_enqueue,
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.destroy = ingress_destroy,
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.dump = ingress_dump,
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.owner = THIS_MODULE,
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};
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static int __init ingress_module_init(void)
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{
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return register_qdisc(&ingress_qdisc_ops);
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}
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static void __exit ingress_module_exit(void)
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{
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unregister_qdisc(&ingress_qdisc_ops);
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}
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module_init(ingress_module_init)
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module_exit(ingress_module_exit)
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MODULE_LICENSE("GPL");
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