265 lines
6.3 KiB
C
265 lines
6.3 KiB
C
/* net/sched/sch_ingress.c - Ingress and clsact qdisc
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*
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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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#include <net/pkt_cls.h>
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struct ingress_sched_data {
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struct tcf_block *block;
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struct tcf_block_ext_info block_info;
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struct mini_Qdisc_pair miniqp;
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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_find(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_find(sch, classid);
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}
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static void ingress_unbind_filter(struct Qdisc *sch, unsigned long cl)
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{
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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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}
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static struct tcf_block *ingress_tcf_block(struct Qdisc *sch, unsigned long cl,
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struct netlink_ext_ack *extack)
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{
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struct ingress_sched_data *q = qdisc_priv(sch);
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return q->block;
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}
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static void clsact_chain_head_change(struct tcf_proto *tp_head, void *priv)
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{
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struct mini_Qdisc_pair *miniqp = priv;
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mini_qdisc_pair_swap(miniqp, tp_head);
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}
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static int ingress_init(struct Qdisc *sch, struct nlattr *opt,
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struct netlink_ext_ack *extack)
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{
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struct ingress_sched_data *q = qdisc_priv(sch);
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struct net_device *dev = qdisc_dev(sch);
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int err;
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net_inc_ingress_queue();
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mini_qdisc_pair_init(&q->miniqp, sch, &dev->miniq_ingress);
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q->block_info.binder_type = TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
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q->block_info.chain_head_change = clsact_chain_head_change;
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q->block_info.chain_head_change_priv = &q->miniqp;
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err = tcf_block_get_ext(&q->block, sch, &q->block_info, extack);
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if (err)
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return err;
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sch->flags |= TCQ_F_CPUSTATS;
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return 0;
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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_sched_data *q = qdisc_priv(sch);
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tcf_block_put_ext(q->block, sch, &q->block_info);
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net_dec_ingress_queue();
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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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return nla_nest_end(skb, nest);
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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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.leaf = ingress_leaf,
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.find = ingress_find,
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.walk = ingress_walk,
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.tcf_block = ingress_tcf_block,
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.bind_tcf = ingress_bind_filter,
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.unbind_tcf = ingress_unbind_filter,
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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_sched_data),
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.init = ingress_init,
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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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struct clsact_sched_data {
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struct tcf_block *ingress_block;
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struct tcf_block *egress_block;
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struct tcf_block_ext_info ingress_block_info;
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struct tcf_block_ext_info egress_block_info;
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struct mini_Qdisc_pair miniqp_ingress;
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struct mini_Qdisc_pair miniqp_egress;
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};
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static unsigned long clsact_find(struct Qdisc *sch, u32 classid)
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{
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switch (TC_H_MIN(classid)) {
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case TC_H_MIN(TC_H_MIN_INGRESS):
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case TC_H_MIN(TC_H_MIN_EGRESS):
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return TC_H_MIN(classid);
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default:
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return 0;
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}
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}
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static unsigned long clsact_bind_filter(struct Qdisc *sch,
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unsigned long parent, u32 classid)
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{
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return clsact_find(sch, classid);
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}
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static struct tcf_block *clsact_tcf_block(struct Qdisc *sch, unsigned long cl,
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struct netlink_ext_ack *extack)
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{
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struct clsact_sched_data *q = qdisc_priv(sch);
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switch (cl) {
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case TC_H_MIN(TC_H_MIN_INGRESS):
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return q->ingress_block;
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case TC_H_MIN(TC_H_MIN_EGRESS):
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return q->egress_block;
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default:
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return NULL;
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}
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}
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static int clsact_init(struct Qdisc *sch, struct nlattr *opt,
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struct netlink_ext_ack *extack)
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{
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struct clsact_sched_data *q = qdisc_priv(sch);
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struct net_device *dev = qdisc_dev(sch);
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int err;
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net_inc_ingress_queue();
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net_inc_egress_queue();
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mini_qdisc_pair_init(&q->miniqp_ingress, sch, &dev->miniq_ingress);
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q->ingress_block_info.binder_type = TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS;
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q->ingress_block_info.chain_head_change = clsact_chain_head_change;
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q->ingress_block_info.chain_head_change_priv = &q->miniqp_ingress;
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err = tcf_block_get_ext(&q->ingress_block, sch, &q->ingress_block_info,
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extack);
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if (err)
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return err;
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mini_qdisc_pair_init(&q->miniqp_egress, sch, &dev->miniq_egress);
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q->egress_block_info.binder_type = TCF_BLOCK_BINDER_TYPE_CLSACT_EGRESS;
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q->egress_block_info.chain_head_change = clsact_chain_head_change;
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q->egress_block_info.chain_head_change_priv = &q->miniqp_egress;
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err = tcf_block_get_ext(&q->egress_block, sch, &q->egress_block_info,
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extack);
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if (err)
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return err;
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sch->flags |= TCQ_F_CPUSTATS;
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return 0;
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}
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static void clsact_destroy(struct Qdisc *sch)
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{
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struct clsact_sched_data *q = qdisc_priv(sch);
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tcf_block_put_ext(q->egress_block, sch, &q->egress_block_info);
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tcf_block_put_ext(q->ingress_block, sch, &q->ingress_block_info);
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net_dec_ingress_queue();
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net_dec_egress_queue();
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}
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static const struct Qdisc_class_ops clsact_class_ops = {
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.leaf = ingress_leaf,
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.find = clsact_find,
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.walk = ingress_walk,
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.tcf_block = clsact_tcf_block,
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.bind_tcf = clsact_bind_filter,
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.unbind_tcf = ingress_unbind_filter,
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};
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static struct Qdisc_ops clsact_qdisc_ops __read_mostly = {
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.cl_ops = &clsact_class_ops,
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.id = "clsact",
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.priv_size = sizeof(struct clsact_sched_data),
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.init = clsact_init,
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.destroy = clsact_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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int ret;
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ret = register_qdisc(&ingress_qdisc_ops);
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if (!ret) {
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ret = register_qdisc(&clsact_qdisc_ops);
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if (ret)
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unregister_qdisc(&ingress_qdisc_ops);
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}
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return ret;
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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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unregister_qdisc(&clsact_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_ALIAS("sch_clsact");
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MODULE_LICENSE("GPL");
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