Commit | Line | Data |
---|---|---|
1f211a1b DB |
1 | /* net/sched/sch_ingress.c - Ingress and clsact qdisc |
2 | * | |
1da177e4 LT |
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 | ||
1da177e4 LT |
11 | #include <linux/module.h> |
12 | #include <linux/types.h> | |
0ba48053 | 13 | #include <linux/list.h> |
1da177e4 | 14 | #include <linux/skbuff.h> |
1da177e4 | 15 | #include <linux/rtnetlink.h> |
d2788d34 | 16 | |
dc5fc579 | 17 | #include <net/netlink.h> |
1da177e4 | 18 | #include <net/pkt_sched.h> |
1da177e4 | 19 | |
1da177e4 LT |
20 | static struct Qdisc *ingress_leaf(struct Qdisc *sch, unsigned long arg) |
21 | { | |
22 | return NULL; | |
23 | } | |
24 | ||
58f4df42 | 25 | static unsigned long ingress_get(struct Qdisc *sch, u32 classid) |
1da177e4 | 26 | { |
1da177e4 LT |
27 | return TC_H_MIN(classid) + 1; |
28 | } | |
29 | ||
92c075db DB |
30 | static bool ingress_cl_offload(u32 classid) |
31 | { | |
32 | return true; | |
33 | } | |
34 | ||
1da177e4 | 35 | static unsigned long ingress_bind_filter(struct Qdisc *sch, |
58f4df42 | 36 | unsigned long parent, u32 classid) |
1da177e4 LT |
37 | { |
38 | return ingress_get(sch, classid); | |
39 | } | |
40 | ||
1da177e4 LT |
41 | static void ingress_put(struct Qdisc *sch, unsigned long cl) |
42 | { | |
43 | } | |
44 | ||
58f4df42 | 45 | static void ingress_walk(struct Qdisc *sch, struct qdisc_walker *walker) |
1da177e4 | 46 | { |
1da177e4 LT |
47 | } |
48 | ||
25d8c0d5 JF |
49 | static struct tcf_proto __rcu **ingress_find_tcf(struct Qdisc *sch, |
50 | unsigned long cl) | |
1da177e4 | 51 | { |
d2788d34 | 52 | struct net_device *dev = qdisc_dev(sch); |
1da177e4 | 53 | |
d2788d34 | 54 | return &dev->ingress_cl_list; |
1da177e4 LT |
55 | } |
56 | ||
4577139b DB |
57 | static int ingress_init(struct Qdisc *sch, struct nlattr *opt) |
58 | { | |
59 | net_inc_ingress_queue(); | |
087c1a60 | 60 | sch->flags |= TCQ_F_CPUSTATS; |
4577139b DB |
61 | |
62 | return 0; | |
63 | } | |
64 | ||
1da177e4 LT |
65 | static void ingress_destroy(struct Qdisc *sch) |
66 | { | |
d2788d34 | 67 | struct net_device *dev = qdisc_dev(sch); |
1da177e4 | 68 | |
d2788d34 | 69 | tcf_destroy_chain(&dev->ingress_cl_list); |
4577139b | 70 | net_dec_ingress_queue(); |
1da177e4 LT |
71 | } |
72 | ||
1da177e4 LT |
73 | static int ingress_dump(struct Qdisc *sch, struct sk_buff *skb) |
74 | { | |
4b3550ef | 75 | struct nlattr *nest; |
1da177e4 | 76 | |
4b3550ef PM |
77 | nest = nla_nest_start(skb, TCA_OPTIONS); |
78 | if (nest == NULL) | |
79 | goto nla_put_failure; | |
d2788d34 | 80 | |
d59b7d80 | 81 | return nla_nest_end(skb, nest); |
1da177e4 | 82 | |
1e90474c | 83 | nla_put_failure: |
4b3550ef | 84 | nla_nest_cancel(skb, nest); |
1da177e4 LT |
85 | return -1; |
86 | } | |
87 | ||
20fea08b | 88 | static const struct Qdisc_class_ops ingress_class_ops = { |
1da177e4 LT |
89 | .leaf = ingress_leaf, |
90 | .get = ingress_get, | |
91 | .put = ingress_put, | |
1da177e4 LT |
92 | .walk = ingress_walk, |
93 | .tcf_chain = ingress_find_tcf, | |
92c075db | 94 | .tcf_cl_offload = ingress_cl_offload, |
1da177e4 LT |
95 | .bind_tcf = ingress_bind_filter, |
96 | .unbind_tcf = ingress_put, | |
1da177e4 LT |
97 | }; |
98 | ||
20fea08b | 99 | static struct Qdisc_ops ingress_qdisc_ops __read_mostly = { |
1da177e4 LT |
100 | .cl_ops = &ingress_class_ops, |
101 | .id = "ingress", | |
4577139b | 102 | .init = ingress_init, |
1da177e4 | 103 | .destroy = ingress_destroy, |
1da177e4 LT |
104 | .dump = ingress_dump, |
105 | .owner = THIS_MODULE, | |
106 | }; | |
107 | ||
1f211a1b DB |
108 | static unsigned long clsact_get(struct Qdisc *sch, u32 classid) |
109 | { | |
110 | switch (TC_H_MIN(classid)) { | |
111 | case TC_H_MIN(TC_H_MIN_INGRESS): | |
112 | case TC_H_MIN(TC_H_MIN_EGRESS): | |
113 | return TC_H_MIN(classid); | |
114 | default: | |
115 | return 0; | |
116 | } | |
117 | } | |
118 | ||
92c075db DB |
119 | static bool clsact_cl_offload(u32 classid) |
120 | { | |
121 | return TC_H_MIN(classid) == TC_H_MIN(TC_H_MIN_INGRESS); | |
122 | } | |
123 | ||
1f211a1b DB |
124 | static unsigned long clsact_bind_filter(struct Qdisc *sch, |
125 | unsigned long parent, u32 classid) | |
126 | { | |
127 | return clsact_get(sch, classid); | |
128 | } | |
129 | ||
130 | static struct tcf_proto __rcu **clsact_find_tcf(struct Qdisc *sch, | |
131 | unsigned long cl) | |
132 | { | |
133 | struct net_device *dev = qdisc_dev(sch); | |
134 | ||
135 | switch (cl) { | |
136 | case TC_H_MIN(TC_H_MIN_INGRESS): | |
137 | return &dev->ingress_cl_list; | |
138 | case TC_H_MIN(TC_H_MIN_EGRESS): | |
139 | return &dev->egress_cl_list; | |
140 | default: | |
141 | return NULL; | |
142 | } | |
143 | } | |
144 | ||
145 | static int clsact_init(struct Qdisc *sch, struct nlattr *opt) | |
146 | { | |
147 | net_inc_ingress_queue(); | |
148 | net_inc_egress_queue(); | |
149 | ||
150 | sch->flags |= TCQ_F_CPUSTATS; | |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
155 | static void clsact_destroy(struct Qdisc *sch) | |
156 | { | |
157 | struct net_device *dev = qdisc_dev(sch); | |
158 | ||
159 | tcf_destroy_chain(&dev->ingress_cl_list); | |
160 | tcf_destroy_chain(&dev->egress_cl_list); | |
161 | ||
162 | net_dec_ingress_queue(); | |
163 | net_dec_egress_queue(); | |
164 | } | |
165 | ||
166 | static const struct Qdisc_class_ops clsact_class_ops = { | |
167 | .leaf = ingress_leaf, | |
168 | .get = clsact_get, | |
169 | .put = ingress_put, | |
170 | .walk = ingress_walk, | |
171 | .tcf_chain = clsact_find_tcf, | |
92c075db | 172 | .tcf_cl_offload = clsact_cl_offload, |
1f211a1b DB |
173 | .bind_tcf = clsact_bind_filter, |
174 | .unbind_tcf = ingress_put, | |
175 | }; | |
176 | ||
177 | static struct Qdisc_ops clsact_qdisc_ops __read_mostly = { | |
178 | .cl_ops = &clsact_class_ops, | |
179 | .id = "clsact", | |
180 | .init = clsact_init, | |
181 | .destroy = clsact_destroy, | |
182 | .dump = ingress_dump, | |
183 | .owner = THIS_MODULE, | |
184 | }; | |
185 | ||
1da177e4 LT |
186 | static int __init ingress_module_init(void) |
187 | { | |
1f211a1b DB |
188 | int ret; |
189 | ||
190 | ret = register_qdisc(&ingress_qdisc_ops); | |
191 | if (!ret) { | |
192 | ret = register_qdisc(&clsact_qdisc_ops); | |
193 | if (ret) | |
194 | unregister_qdisc(&ingress_qdisc_ops); | |
195 | } | |
196 | ||
197 | return ret; | |
1da177e4 | 198 | } |
58f4df42 | 199 | |
10297b99 | 200 | static void __exit ingress_module_exit(void) |
1da177e4 LT |
201 | { |
202 | unregister_qdisc(&ingress_qdisc_ops); | |
1f211a1b | 203 | unregister_qdisc(&clsact_qdisc_ops); |
1da177e4 | 204 | } |
58f4df42 | 205 | |
d2788d34 DB |
206 | module_init(ingress_module_init); |
207 | module_exit(ingress_module_exit); | |
208 | ||
1f211a1b | 209 | MODULE_ALIAS("sch_clsact"); |
1da177e4 | 210 | MODULE_LICENSE("GPL"); |