2 * net/sched/cls_fw.c Classifier mapping ipchains' fwmark to traffic class.
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; either version
7 * 2 of the License, or (at your option) any later version.
9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
12 * Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_walk off by one
13 * Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_delete killed all the filter (and kernel).
14 * Alex <alex@pilotsoft.com> : 2004xxyy: Added Action extension
16 * JHS: We should remove the CONFIG_NET_CLS_IND from here
17 * eventually when the meta match extension is made available
21 #include <linux/config.h>
22 #include <linux/module.h>
23 #include <asm/uaccess.h>
24 #include <asm/system.h>
25 #include <linux/bitops.h>
26 #include <linux/types.h>
27 #include <linux/kernel.h>
28 #include <linux/sched.h>
29 #include <linux/string.h>
31 #include <linux/socket.h>
32 #include <linux/sockios.h>
34 #include <linux/errno.h>
35 #include <linux/interrupt.h>
36 #include <linux/if_ether.h>
37 #include <linux/inet.h>
38 #include <linux/netdevice.h>
39 #include <linux/etherdevice.h>
40 #include <linux/notifier.h>
41 #include <linux/netfilter.h>
43 #include <net/route.h>
44 #include <linux/skbuff.h>
46 #include <net/act_api.h>
47 #include <net/pkt_cls.h>
51 struct fw_filter
*ht
[256];
56 struct fw_filter
*next
;
58 struct tcf_result res
;
59 #ifdef CONFIG_NET_CLS_IND
61 #endif /* CONFIG_NET_CLS_IND */
65 static struct tcf_ext_map fw_ext_map
= {
67 .police
= TCA_FW_POLICE
70 static __inline__
int fw_hash(u32 handle
)
75 static int fw_classify(struct sk_buff
*skb
, struct tcf_proto
*tp
,
76 struct tcf_result
*res
)
78 struct fw_head
*head
= (struct fw_head
*)tp
->root
;
81 #ifdef CONFIG_NETFILTER
88 for (f
=head
->ht
[fw_hash(id
)]; f
; f
=f
->next
) {
91 #ifdef CONFIG_NET_CLS_IND
92 if (!tcf_match_indev(skb
, f
->indev
))
94 #endif /* CONFIG_NET_CLS_IND */
95 r
= tcf_exts_exec(skb
, &f
->exts
, res
);
104 if (id
&& (TC_H_MAJ(id
) == 0 || !(TC_H_MAJ(id
^tp
->q
->handle
)))) {
114 static unsigned long fw_get(struct tcf_proto
*tp
, u32 handle
)
116 struct fw_head
*head
= (struct fw_head
*)tp
->root
;
122 for (f
=head
->ht
[fw_hash(handle
)]; f
; f
=f
->next
) {
124 return (unsigned long)f
;
129 static void fw_put(struct tcf_proto
*tp
, unsigned long f
)
133 static int fw_init(struct tcf_proto
*tp
)
139 fw_delete_filter(struct tcf_proto
*tp
, struct fw_filter
*f
)
141 tcf_unbind_filter(tp
, &f
->res
);
142 tcf_exts_destroy(tp
, &f
->exts
);
146 static void fw_destroy(struct tcf_proto
*tp
)
148 struct fw_head
*head
= (struct fw_head
*)xchg(&tp
->root
, NULL
);
155 for (h
=0; h
<256; h
++) {
156 while ((f
=head
->ht
[h
]) != NULL
) {
157 head
->ht
[h
] = f
->next
;
158 fw_delete_filter(tp
, f
);
164 static int fw_delete(struct tcf_proto
*tp
, unsigned long arg
)
166 struct fw_head
*head
= (struct fw_head
*)tp
->root
;
167 struct fw_filter
*f
= (struct fw_filter
*)arg
;
168 struct fw_filter
**fp
;
170 if (head
== NULL
|| f
== NULL
)
173 for (fp
=&head
->ht
[fw_hash(f
->id
)]; *fp
; fp
= &(*fp
)->next
) {
178 fw_delete_filter(tp
, f
);
187 fw_change_attrs(struct tcf_proto
*tp
, struct fw_filter
*f
,
188 struct rtattr
**tb
, struct rtattr
**tca
, unsigned long base
)
193 err
= tcf_exts_validate(tp
, tb
, tca
[TCA_RATE
-1], &e
, &fw_ext_map
);
198 if (tb
[TCA_FW_CLASSID
-1]) {
199 if (RTA_PAYLOAD(tb
[TCA_FW_CLASSID
-1]) != sizeof(u32
))
201 f
->res
.classid
= *(u32
*)RTA_DATA(tb
[TCA_FW_CLASSID
-1]);
202 tcf_bind_filter(tp
, &f
->res
, base
);
205 #ifdef CONFIG_NET_CLS_IND
206 if (tb
[TCA_FW_INDEV
-1]) {
207 err
= tcf_change_indev(tp
, f
->indev
, tb
[TCA_FW_INDEV
-1]);
211 #endif /* CONFIG_NET_CLS_IND */
213 tcf_exts_change(tp
, &f
->exts
, &e
);
217 tcf_exts_destroy(tp
, &e
);
221 static int fw_change(struct tcf_proto
*tp
, unsigned long base
,
226 struct fw_head
*head
= (struct fw_head
*)tp
->root
;
227 struct fw_filter
*f
= (struct fw_filter
*) *arg
;
228 struct rtattr
*opt
= tca
[TCA_OPTIONS
-1];
229 struct rtattr
*tb
[TCA_FW_MAX
];
233 return handle
? -EINVAL
: 0;
235 if (rtattr_parse_nested(tb
, TCA_FW_MAX
, opt
) < 0)
239 if (f
->id
!= handle
&& handle
)
241 return fw_change_attrs(tp
, f
, tb
, tca
, base
);
248 head
= kmalloc(sizeof(struct fw_head
), GFP_KERNEL
);
251 memset(head
, 0, sizeof(*head
));
258 f
= kmalloc(sizeof(struct fw_filter
), GFP_KERNEL
);
261 memset(f
, 0, sizeof(*f
));
265 err
= fw_change_attrs(tp
, f
, tb
, tca
, base
);
269 f
->next
= head
->ht
[fw_hash(handle
)];
271 head
->ht
[fw_hash(handle
)] = f
;
274 *arg
= (unsigned long)f
;
283 static void fw_walk(struct tcf_proto
*tp
, struct tcf_walker
*arg
)
285 struct fw_head
*head
= (struct fw_head
*)tp
->root
;
294 for (h
= 0; h
< 256; h
++) {
297 for (f
= head
->ht
[h
]; f
; f
= f
->next
) {
298 if (arg
->count
< arg
->skip
) {
302 if (arg
->fn(tp
, (unsigned long)f
, arg
) < 0) {
311 static int fw_dump(struct tcf_proto
*tp
, unsigned long fh
,
312 struct sk_buff
*skb
, struct tcmsg
*t
)
314 struct fw_filter
*f
= (struct fw_filter
*)fh
;
315 unsigned char *b
= skb
->tail
;
321 t
->tcm_handle
= f
->id
;
323 if (!f
->res
.classid
&& !tcf_exts_is_available(&f
->exts
))
326 rta
= (struct rtattr
*)b
;
327 RTA_PUT(skb
, TCA_OPTIONS
, 0, NULL
);
330 RTA_PUT(skb
, TCA_FW_CLASSID
, 4, &f
->res
.classid
);
331 #ifdef CONFIG_NET_CLS_IND
332 if (strlen(f
->indev
))
333 RTA_PUT(skb
, TCA_FW_INDEV
, IFNAMSIZ
, f
->indev
);
334 #endif /* CONFIG_NET_CLS_IND */
336 if (tcf_exts_dump(skb
, &f
->exts
, &fw_ext_map
) < 0)
339 rta
->rta_len
= skb
->tail
- b
;
341 if (tcf_exts_dump_stats(skb
, &f
->exts
, &fw_ext_map
) < 0)
347 skb_trim(skb
, b
- skb
->data
);
351 static struct tcf_proto_ops cls_fw_ops
= {
354 .classify
= fw_classify
,
356 .destroy
= fw_destroy
,
363 .owner
= THIS_MODULE
,
366 static int __init
init_fw(void)
368 return register_tcf_proto_ops(&cls_fw_ops
);
371 static void __exit
exit_fw(void)
373 unregister_tcf_proto_ops(&cls_fw_ops
);
378 MODULE_LICENSE("GPL");