1 /* net/sched/sch_ingress.c - Ingress qdisc
2 * This program is free software; you can redistribute it and/or
3 * modify it under the terms of the GNU General Public License
4 * as published by the Free Software Foundation; either version
5 * 2 of the License, or (at your option) any later version.
7 * Authors: Jamal Hadi Salim 1999
10 #include <linux/module.h>
11 #include <linux/types.h>
12 #include <linux/list.h>
13 #include <linux/skbuff.h>
14 #include <linux/rtnetlink.h>
15 #include <net/netlink.h>
16 #include <net/pkt_sched.h>
19 struct ingress_qdisc_data
{
20 struct tcf_proto
*filter_list
;
23 /* ------------------------- Class/flow operations ------------------------- */
25 static int ingress_graft(struct Qdisc
*sch
, unsigned long arg
,
26 struct Qdisc
*new, struct Qdisc
**old
)
31 static struct Qdisc
*ingress_leaf(struct Qdisc
*sch
, unsigned long arg
)
36 static unsigned long ingress_get(struct Qdisc
*sch
, u32 classid
)
38 return TC_H_MIN(classid
) + 1;
41 static unsigned long ingress_bind_filter(struct Qdisc
*sch
,
42 unsigned long parent
, u32 classid
)
44 return ingress_get(sch
, classid
);
47 static void ingress_put(struct Qdisc
*sch
, unsigned long cl
)
51 static int ingress_change(struct Qdisc
*sch
, u32 classid
, u32 parent
,
52 struct nlattr
**tca
, unsigned long *arg
)
57 static void ingress_walk(struct Qdisc
*sch
, struct qdisc_walker
*walker
)
62 static struct tcf_proto
**ingress_find_tcf(struct Qdisc
*sch
, unsigned long cl
)
64 struct ingress_qdisc_data
*p
= qdisc_priv(sch
);
66 return &p
->filter_list
;
69 /* --------------------------- Qdisc operations ---------------------------- */
71 static int ingress_enqueue(struct sk_buff
*skb
, struct Qdisc
*sch
)
73 struct ingress_qdisc_data
*p
= qdisc_priv(sch
);
74 struct tcf_result res
;
77 result
= tc_classify(skb
, p
->filter_list
, &res
);
79 sch
->bstats
.packets
++;
80 sch
->bstats
.bytes
+= qdisc_pkt_len(skb
);
88 result
= TC_ACT_STOLEN
;
90 case TC_ACT_RECLASSIFY
:
92 skb
->tc_index
= TC_H_MIN(res
.classid
);
101 /* ------------------------------------------------------------- */
103 static void ingress_destroy(struct Qdisc
*sch
)
105 struct ingress_qdisc_data
*p
= qdisc_priv(sch
);
107 tcf_destroy_chain(&p
->filter_list
);
110 static int ingress_dump(struct Qdisc
*sch
, struct sk_buff
*skb
)
114 nest
= nla_nest_start(skb
, TCA_OPTIONS
);
116 goto nla_put_failure
;
117 nla_nest_end(skb
, nest
);
121 nla_nest_cancel(skb
, nest
);
125 static const struct Qdisc_class_ops ingress_class_ops
= {
126 .graft
= ingress_graft
,
127 .leaf
= ingress_leaf
,
130 .change
= ingress_change
,
131 .walk
= ingress_walk
,
132 .tcf_chain
= ingress_find_tcf
,
133 .bind_tcf
= ingress_bind_filter
,
134 .unbind_tcf
= ingress_put
,
137 static struct Qdisc_ops ingress_qdisc_ops __read_mostly
= {
138 .cl_ops
= &ingress_class_ops
,
140 .priv_size
= sizeof(struct ingress_qdisc_data
),
141 .enqueue
= ingress_enqueue
,
142 .destroy
= ingress_destroy
,
143 .dump
= ingress_dump
,
144 .owner
= THIS_MODULE
,
147 static int __init
ingress_module_init(void)
149 return register_qdisc(&ingress_qdisc_ops
);
152 static void __exit
ingress_module_exit(void)
154 unregister_qdisc(&ingress_qdisc_ops
);
157 module_init(ingress_module_init
)
158 module_exit(ingress_module_exit
)
159 MODULE_LICENSE("GPL");