tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/* net/sched/sch_ingress.c - Ingress and clsact qdisc
2 *
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU General Public License
5 * as published by the Free Software Foundation; either version
6 * 2 of the License, or (at your option) any later version.
7 *
8 * Authors: Jamal Hadi Salim 1999
9 */
10
11#include <linux/module.h>
12#include <linux/types.h>
13#include <linux/list.h>
14#include <linux/skbuff.h>
15#include <linux/rtnetlink.h>
16
17#include <net/netlink.h>
18#include <net/pkt_sched.h>
19
20static struct Qdisc *ingress_leaf(struct Qdisc *sch, unsigned long arg)
21{
22 return NULL;
23}
24
25static unsigned long ingress_get(struct Qdisc *sch, u32 classid)
26{
27 return TC_H_MIN(classid) + 1;
28}
29
30static unsigned long ingress_bind_filter(struct Qdisc *sch,
31 unsigned long parent, u32 classid)
32{
33 return ingress_get(sch, classid);
34}
35
36static void ingress_put(struct Qdisc *sch, unsigned long cl)
37{
38}
39
40static void ingress_walk(struct Qdisc *sch, struct qdisc_walker *walker)
41{
42}
43
44static struct tcf_proto __rcu **ingress_find_tcf(struct Qdisc *sch,
45 unsigned long cl)
46{
47 struct net_device *dev = qdisc_dev(sch);
48
49 return &dev->ingress_cl_list;
50}
51
52static int ingress_init(struct Qdisc *sch, struct nlattr *opt)
53{
54 net_inc_ingress_queue();
55 sch->flags |= TCQ_F_CPUSTATS;
56
57 return 0;
58}
59
60static void ingress_destroy(struct Qdisc *sch)
61{
62 struct net_device *dev = qdisc_dev(sch);
63
64 tcf_destroy_chain(&dev->ingress_cl_list);
65 net_dec_ingress_queue();
66}
67
68static int ingress_dump(struct Qdisc *sch, struct sk_buff *skb)
69{
70 struct nlattr *nest;
71
72 nest = nla_nest_start(skb, TCA_OPTIONS);
73 if (nest == NULL)
74 goto nla_put_failure;
75
76 return nla_nest_end(skb, nest);
77
78nla_put_failure:
79 nla_nest_cancel(skb, nest);
80 return -1;
81}
82
83static const struct Qdisc_class_ops ingress_class_ops = {
84 .leaf = ingress_leaf,
85 .get = ingress_get,
86 .put = ingress_put,
87 .walk = ingress_walk,
88 .tcf_chain = ingress_find_tcf,
89 .bind_tcf = ingress_bind_filter,
90 .unbind_tcf = ingress_put,
91};
92
93static struct Qdisc_ops ingress_qdisc_ops __read_mostly = {
94 .cl_ops = &ingress_class_ops,
95 .id = "ingress",
96 .init = ingress_init,
97 .destroy = ingress_destroy,
98 .dump = ingress_dump,
99 .owner = THIS_MODULE,
100};
101
102static unsigned long clsact_get(struct Qdisc *sch, u32 classid)
103{
104 switch (TC_H_MIN(classid)) {
105 case TC_H_MIN(TC_H_MIN_INGRESS):
106 case TC_H_MIN(TC_H_MIN_EGRESS):
107 return TC_H_MIN(classid);
108 default:
109 return 0;
110 }
111}
112
113static unsigned long clsact_bind_filter(struct Qdisc *sch,
114 unsigned long parent, u32 classid)
115{
116 return clsact_get(sch, classid);
117}
118
119static struct tcf_proto __rcu **clsact_find_tcf(struct Qdisc *sch,
120 unsigned long cl)
121{
122 struct net_device *dev = qdisc_dev(sch);
123
124 switch (cl) {
125 case TC_H_MIN(TC_H_MIN_INGRESS):
126 return &dev->ingress_cl_list;
127 case TC_H_MIN(TC_H_MIN_EGRESS):
128 return &dev->egress_cl_list;
129 default:
130 return NULL;
131 }
132}
133
134static int clsact_init(struct Qdisc *sch, struct nlattr *opt)
135{
136 net_inc_ingress_queue();
137 net_inc_egress_queue();
138
139 sch->flags |= TCQ_F_CPUSTATS;
140
141 return 0;
142}
143
144static void clsact_destroy(struct Qdisc *sch)
145{
146 struct net_device *dev = qdisc_dev(sch);
147
148 tcf_destroy_chain(&dev->ingress_cl_list);
149 tcf_destroy_chain(&dev->egress_cl_list);
150
151 net_dec_ingress_queue();
152 net_dec_egress_queue();
153}
154
155static const struct Qdisc_class_ops clsact_class_ops = {
156 .leaf = ingress_leaf,
157 .get = clsact_get,
158 .put = ingress_put,
159 .walk = ingress_walk,
160 .tcf_chain = clsact_find_tcf,
161 .bind_tcf = clsact_bind_filter,
162 .unbind_tcf = ingress_put,
163};
164
165static struct Qdisc_ops clsact_qdisc_ops __read_mostly = {
166 .cl_ops = &clsact_class_ops,
167 .id = "clsact",
168 .init = clsact_init,
169 .destroy = clsact_destroy,
170 .dump = ingress_dump,
171 .owner = THIS_MODULE,
172};
173
174static int __init ingress_module_init(void)
175{
176 int ret;
177
178 ret = register_qdisc(&ingress_qdisc_ops);
179 if (!ret) {
180 ret = register_qdisc(&clsact_qdisc_ops);
181 if (ret)
182 unregister_qdisc(&ingress_qdisc_ops);
183 }
184
185 return ret;
186}
187
188static void __exit ingress_module_exit(void)
189{
190 unregister_qdisc(&ingress_qdisc_ops);
191 unregister_qdisc(&clsact_qdisc_ops);
192}
193
194module_init(ingress_module_init);
195module_exit(ingress_module_exit);
196
197MODULE_ALIAS("sch_clsact");
198MODULE_LICENSE("GPL");