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[/] [test_project/] [trunk/] [linux_sd_driver/] [net/] [sched/] [cls_fw.c] - Blame information for rev 62

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/*
 * net/sched/cls_fw.c   Classifier mapping ipchains' fwmark to traffic class.
 *
 *              This program is free software; you can redistribute it and/or
 *              modify it under the terms of the GNU General Public License
 *              as published by the Free Software Foundation; either version
 *              2 of the License, or (at your option) any later version.
 *
 * Authors:     Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>
 *
 * Changes:
 * Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_walk off by one
 * Karlis Peisenieks <karlis@mt.lv> : 990415 : fw_delete killed all the filter (and kernel).
 * Alex <alex@pilotsoft.com> : 2004xxyy: Added Action extension
 *
 * JHS: We should remove the CONFIG_NET_CLS_IND from here
 * eventually when the meta match extension is made available
 *
 */
 
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <net/netlink.h>
#include <net/act_api.h>
#include <net/pkt_cls.h>
 
#define HTSIZE (PAGE_SIZE/sizeof(struct fw_filter *))
 
struct fw_head
{
        struct fw_filter *ht[HTSIZE];
        u32 mask;
};
 
struct fw_filter
{
        struct fw_filter        *next;
        u32                     id;
        struct tcf_result       res;
#ifdef CONFIG_NET_CLS_IND
        char                    indev[IFNAMSIZ];
#endif /* CONFIG_NET_CLS_IND */
        struct tcf_exts         exts;
};
 
static struct tcf_ext_map fw_ext_map = {
        .action = TCA_FW_ACT,
        .police = TCA_FW_POLICE
};
 
static __inline__ int fw_hash(u32 handle)
{
        if (HTSIZE == 4096)
                return ((handle >> 24) & 0xFFF) ^
                       ((handle >> 12) & 0xFFF) ^
                       (handle & 0xFFF);
        else if (HTSIZE == 2048)
                return ((handle >> 22) & 0x7FF) ^
                       ((handle >> 11) & 0x7FF) ^
                       (handle & 0x7FF);
        else if (HTSIZE == 1024)
                return ((handle >> 20) & 0x3FF) ^
                       ((handle >> 10) & 0x3FF) ^
                       (handle & 0x3FF);
        else if (HTSIZE == 512)
                return (handle >> 27) ^
                       ((handle >> 18) & 0x1FF) ^
                       ((handle >> 9) & 0x1FF) ^
                       (handle & 0x1FF);
        else if (HTSIZE == 256) {
                u8 *t = (u8 *) &handle;
                return t[0] ^ t[1] ^ t[2] ^ t[3];
        } else
                return handle & (HTSIZE - 1);
}
 
static int fw_classify(struct sk_buff *skb, struct tcf_proto *tp,
                          struct tcf_result *res)
{
        struct fw_head *head = (struct fw_head*)tp->root;
        struct fw_filter *f;
        int r;
        u32 id = skb->mark;
 
        if (head != NULL) {
                id &= head->mask;
                for (f=head->ht[fw_hash(id)]; f; f=f->next) {
                        if (f->id == id) {
                                *res = f->res;
#ifdef CONFIG_NET_CLS_IND
                                if (!tcf_match_indev(skb, f->indev))
                                        continue;
#endif /* CONFIG_NET_CLS_IND */
                                r = tcf_exts_exec(skb, &f->exts, res);
                                if (r < 0)
                                        continue;
 
                                return r;
                        }
                }
        } else {
                /* old method */
                if (id && (TC_H_MAJ(id) == 0 || !(TC_H_MAJ(id^tp->q->handle)))) {
                        res->classid = id;
                        res->class = 0;
                        return 0;
                }
        }
 
        return -1;
}
 
static unsigned long fw_get(struct tcf_proto *tp, u32 handle)
{
        struct fw_head *head = (struct fw_head*)tp->root;
        struct fw_filter *f;
 
        if (head == NULL)
                return 0;
 
        for (f=head->ht[fw_hash(handle)]; f; f=f->next) {
                if (f->id == handle)
                        return (unsigned long)f;
        }
        return 0;
}
 
static void fw_put(struct tcf_proto *tp, unsigned long f)
{
}
 
static int fw_init(struct tcf_proto *tp)
{
        return 0;
}
 
static inline void
fw_delete_filter(struct tcf_proto *tp, struct fw_filter *f)
{
        tcf_unbind_filter(tp, &f->res);
        tcf_exts_destroy(tp, &f->exts);
        kfree(f);
}
 
static void fw_destroy(struct tcf_proto *tp)
{
        struct fw_head *head = (struct fw_head*)xchg(&tp->root, NULL);
        struct fw_filter *f;
        int h;
 
        if (head == NULL)
                return;
 
        for (h=0; h<HTSIZE; h++) {
                while ((f=head->ht[h]) != NULL) {
                        head->ht[h] = f->next;
                        fw_delete_filter(tp, f);
                }
        }
        kfree(head);
}
 
static int fw_delete(struct tcf_proto *tp, unsigned long arg)
{
        struct fw_head *head = (struct fw_head*)tp->root;
        struct fw_filter *f = (struct fw_filter*)arg;
        struct fw_filter **fp;
 
        if (head == NULL || f == NULL)
                goto out;
 
        for (fp=&head->ht[fw_hash(f->id)]; *fp; fp = &(*fp)->next) {
                if (*fp == f) {
                        tcf_tree_lock(tp);
                        *fp = f->next;
                        tcf_tree_unlock(tp);
                        fw_delete_filter(tp, f);
                        return 0;
                }
        }
out:
        return -EINVAL;
}
 
static int
fw_change_attrs(struct tcf_proto *tp, struct fw_filter *f,
        struct rtattr **tb, struct rtattr **tca, unsigned long base)
{
        struct fw_head *head = (struct fw_head *)tp->root;
        struct tcf_exts e;
        u32 mask;
        int err;
 
        err = tcf_exts_validate(tp, tb, tca[TCA_RATE-1], &e, &fw_ext_map);
        if (err < 0)
                return err;
 
        err = -EINVAL;
        if (tb[TCA_FW_CLASSID-1]) {
                if (RTA_PAYLOAD(tb[TCA_FW_CLASSID-1]) != sizeof(u32))
                        goto errout;
                f->res.classid = *(u32*)RTA_DATA(tb[TCA_FW_CLASSID-1]);
                tcf_bind_filter(tp, &f->res, base);
        }
 
#ifdef CONFIG_NET_CLS_IND
        if (tb[TCA_FW_INDEV-1]) {
                err = tcf_change_indev(tp, f->indev, tb[TCA_FW_INDEV-1]);
                if (err < 0)
                        goto errout;
        }
#endif /* CONFIG_NET_CLS_IND */
 
        if (tb[TCA_FW_MASK-1]) {
                if (RTA_PAYLOAD(tb[TCA_FW_MASK-1]) != sizeof(u32))
                        goto errout;
                mask = *(u32*)RTA_DATA(tb[TCA_FW_MASK-1]);
                if (mask != head->mask)
                        goto errout;
        } else if (head->mask != 0xFFFFFFFF)
                goto errout;
 
        tcf_exts_change(tp, &f->exts, &e);
 
        return 0;
errout:
        tcf_exts_destroy(tp, &e);
        return err;
}
 
static int fw_change(struct tcf_proto *tp, unsigned long base,
                     u32 handle,
                     struct rtattr **tca,
                     unsigned long *arg)
{
        struct fw_head *head = (struct fw_head*)tp->root;
        struct fw_filter *f = (struct fw_filter *) *arg;
        struct rtattr *opt = tca[TCA_OPTIONS-1];
        struct rtattr *tb[TCA_FW_MAX];
        int err;
 
        if (!opt)
                return handle ? -EINVAL : 0;
 
        if (rtattr_parse_nested(tb, TCA_FW_MAX, opt) < 0)
                return -EINVAL;
 
        if (f != NULL) {
                if (f->id != handle && handle)
                        return -EINVAL;
                return fw_change_attrs(tp, f, tb, tca, base);
        }
 
        if (!handle)
                return -EINVAL;
 
        if (head == NULL) {
                u32 mask = 0xFFFFFFFF;
                if (tb[TCA_FW_MASK-1]) {
                        if (RTA_PAYLOAD(tb[TCA_FW_MASK-1]) != sizeof(u32))
                                return -EINVAL;
                        mask = *(u32*)RTA_DATA(tb[TCA_FW_MASK-1]);
                }
 
                head = kzalloc(sizeof(struct fw_head), GFP_KERNEL);
                if (head == NULL)
                        return -ENOBUFS;
                head->mask = mask;
 
                tcf_tree_lock(tp);
                tp->root = head;
                tcf_tree_unlock(tp);
        }
 
        f = kzalloc(sizeof(struct fw_filter), GFP_KERNEL);
        if (f == NULL)
                return -ENOBUFS;
 
        f->id = handle;
 
        err = fw_change_attrs(tp, f, tb, tca, base);
        if (err < 0)
                goto errout;
 
        f->next = head->ht[fw_hash(handle)];
        tcf_tree_lock(tp);
        head->ht[fw_hash(handle)] = f;
        tcf_tree_unlock(tp);
 
        *arg = (unsigned long)f;
        return 0;
 
errout:
        kfree(f);
        return err;
}
 
static void fw_walk(struct tcf_proto *tp, struct tcf_walker *arg)
{
        struct fw_head *head = (struct fw_head*)tp->root;
        int h;
 
        if (head == NULL)
                arg->stop = 1;
 
        if (arg->stop)
                return;
 
        for (h = 0; h < HTSIZE; h++) {
                struct fw_filter *f;
 
                for (f = head->ht[h]; f; f = f->next) {
                        if (arg->count < arg->skip) {
                                arg->count++;
                                continue;
                        }
                        if (arg->fn(tp, (unsigned long)f, arg) < 0) {
                                arg->stop = 1;
                                return;
                        }
                        arg->count++;
                }
        }
}
 
static int fw_dump(struct tcf_proto *tp, unsigned long fh,
                   struct sk_buff *skb, struct tcmsg *t)
{
        struct fw_head *head = (struct fw_head *)tp->root;
        struct fw_filter *f = (struct fw_filter*)fh;
        unsigned char *b = skb_tail_pointer(skb);
        struct rtattr *rta;
 
        if (f == NULL)
                return skb->len;
 
        t->tcm_handle = f->id;
 
        if (!f->res.classid && !tcf_exts_is_available(&f->exts))
                return skb->len;
 
        rta = (struct rtattr*)b;
        RTA_PUT(skb, TCA_OPTIONS, 0, NULL);
 
        if (f->res.classid)
                RTA_PUT(skb, TCA_FW_CLASSID, 4, &f->res.classid);
#ifdef CONFIG_NET_CLS_IND
        if (strlen(f->indev))
                RTA_PUT(skb, TCA_FW_INDEV, IFNAMSIZ, f->indev);
#endif /* CONFIG_NET_CLS_IND */
        if (head->mask != 0xFFFFFFFF)
                RTA_PUT(skb, TCA_FW_MASK, 4, &head->mask);
 
        if (tcf_exts_dump(skb, &f->exts, &fw_ext_map) < 0)
                goto rtattr_failure;
 
        rta->rta_len = skb_tail_pointer(skb) - b;
 
        if (tcf_exts_dump_stats(skb, &f->exts, &fw_ext_map) < 0)
                goto rtattr_failure;
 
        return skb->len;
 
rtattr_failure:
        nlmsg_trim(skb, b);
        return -1;
}
 
static struct tcf_proto_ops cls_fw_ops = {
        .next           =       NULL,
        .kind           =       "fw",
        .classify       =       fw_classify,
        .init           =       fw_init,
        .destroy        =       fw_destroy,
        .get            =       fw_get,
        .put            =       fw_put,
        .change         =       fw_change,
        .delete         =       fw_delete,
        .walk           =       fw_walk,
        .dump           =       fw_dump,
        .owner          =       THIS_MODULE,
};
 
static int __init init_fw(void)
{
        return register_tcf_proto_ops(&cls_fw_ops);
}
 
static void __exit exit_fw(void)
{
        unregister_tcf_proto_ops(&cls_fw_ops);
}
 
module_init(init_fw)
module_exit(exit_fw)
MODULE_LICENSE("GPL");

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[/] [test_project/] [trunk/] [linux_sd_driver/] [net/] [sched/] [cls_fw.c] - Blame information for rev 62

Line No.	Rev	Author	Line
1	62	marcus.erl	`/*`
2			`* net/sched/cls_fw.c Classifier mapping ipchains' fwmark to traffic class.`
3			`*`
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.`
8			`*`
9			`* Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru>`
10			`*`
11			`* Changes:`
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`
15			`*`
16			`* JHS: We should remove the CONFIG_NET_CLS_IND from here`
17			`* eventually when the meta match extension is made available`
18			`*`
19			`*/`
20
21			`#include <linux/module.h>`
22			`#include <linux/types.h>`
23			`#include <linux/kernel.h>`
24			`#include <linux/string.h>`
25			`#include <linux/errno.h>`
26			`#include <linux/skbuff.h>`
27			`#include <net/netlink.h>`
28			`#include <net/act_api.h>`
29			`#include <net/pkt_cls.h>`
30
31			`#define HTSIZE (PAGE_SIZE/sizeof(struct fw_filter *))`
32
33			`struct fw_head`
34			`{`
35			`struct fw_filter *ht[HTSIZE];`
36			`u32 mask;`
37			`};`
38
39			`struct fw_filter`
40			`{`
41			`struct fw_filter *next;`
42			`u32 id;`
43			`struct tcf_result res;`
44			`#ifdef CONFIG_NET_CLS_IND`
45			`char indev[IFNAMSIZ];`
46			`#endif /* CONFIG_NET_CLS_IND */`
47			`struct tcf_exts exts;`
48			`};`
49
50			`static struct tcf_ext_map fw_ext_map = {`
51			`.action = TCA_FW_ACT,`
52			`.police = TCA_FW_POLICE`
53			`};`
54
55			`static __inline__ int fw_hash(u32 handle)`
56			`{`
57			`if (HTSIZE == 4096)`
58			`return ((handle >> 24) & 0xFFF) ^`
59			`((handle >> 12) & 0xFFF) ^`
60			`(handle & 0xFFF);`
61			`else if (HTSIZE == 2048)`
62			`return ((handle >> 22) & 0x7FF) ^`
63			`((handle >> 11) & 0x7FF) ^`
64			`(handle & 0x7FF);`
65			`else if (HTSIZE == 1024)`
66			`return ((handle >> 20) & 0x3FF) ^`
67			`((handle >> 10) & 0x3FF) ^`
68			`(handle & 0x3FF);`
69			`else if (HTSIZE == 512)`
70			`return (handle >> 27) ^`
71			`((handle >> 18) & 0x1FF) ^`
72			`((handle >> 9) & 0x1FF) ^`
73			`(handle & 0x1FF);`
74			`else if (HTSIZE == 256) {`
75			`u8 t = (u8 ) &handle;`
76			`return t[0] ^ t[1] ^ t[2] ^ t[3];`
77			`} else`
78			`return handle & (HTSIZE - 1);`
79			`}`
80
81			`static int fw_classify(struct sk_buff skb, struct tcf_proto tp,`
82			`struct tcf_result *res)`
83			`{`
84			`struct fw_head head = (struct fw_head)tp->root;`
85			`struct fw_filter *f;`
86			`int r;`
87			`u32 id = skb->mark;`
88
89			`if (head != NULL) {`
90			`id &= head->mask;`
91			`for (f=head->ht[fw_hash(id)]; f; f=f->next) {`
92			`if (f->id == id) {`
93			`*res = f->res;`
94			`#ifdef CONFIG_NET_CLS_IND`
95			`if (!tcf_match_indev(skb, f->indev))`
96			`continue;`
97			`#endif /* CONFIG_NET_CLS_IND */`
98			`r = tcf_exts_exec(skb, &f->exts, res);`
99			`if (r < 0)`
100			`continue;`
101
102			`return r;`
103			`}`
104			`}`
105			`} else {`
106			`/* old method */`
107			`if (id && (TC_H_MAJ(id) == 0 \|\| !(TC_H_MAJ(id^tp->q->handle)))) {`
108			`res->classid = id;`
109			`res->class = 0;`
110			`return 0;`
111			`}`
112			`}`
113
114			`return -1;`
115			`}`
116
117			`static unsigned long fw_get(struct tcf_proto *tp, u32 handle)`
118			`{`
119			`struct fw_head head = (struct fw_head)tp->root;`
120			`struct fw_filter *f;`
121
122			`if (head == NULL)`
123			`return 0;`
124
125			`for (f=head->ht[fw_hash(handle)]; f; f=f->next) {`
126			`if (f->id == handle)`
127			`return (unsigned long)f;`
128			`}`
129			`return 0;`
130			`}`
131
132			`static void fw_put(struct tcf_proto *tp, unsigned long f)`
133			`{`
134			`}`
135
136			`static int fw_init(struct tcf_proto *tp)`
137			`{`
138			`return 0;`
139			`}`
140
141			`static inline void`
142			`fw_delete_filter(struct tcf_proto tp, struct fw_filter f)`
143			`{`
144			`tcf_unbind_filter(tp, &f->res);`
145			`tcf_exts_destroy(tp, &f->exts);`
146			`kfree(f);`
147			`}`
148
149			`static void fw_destroy(struct tcf_proto *tp)`
150			`{`
151			`struct fw_head head = (struct fw_head)xchg(&tp->root, NULL);`
152			`struct fw_filter *f;`
153			`int h;`
154
155			`if (head == NULL)`
156			`return;`
157
158			`for (h=0; h<HTSIZE; h++) {`
159			`while ((f=head->ht[h]) != NULL) {`
160			`head->ht[h] = f->next;`
161			`fw_delete_filter(tp, f);`
162			`}`
163			`}`
164			`kfree(head);`
165			`}`
166
167			`static int fw_delete(struct tcf_proto *tp, unsigned long arg)`
168			`{`
169			`struct fw_head head = (struct fw_head)tp->root;`
170			`struct fw_filter f = (struct fw_filter)arg;`
171			`struct fw_filter **fp;`
172
173			`if (head == NULL \|\| f == NULL)`
174			`goto out;`
175
176			`for (fp=&head->ht[fw_hash(f->id)]; fp; fp = &(fp)->next) {`
177			`if (*fp == f) {`
178			`tcf_tree_lock(tp);`
179			`*fp = f->next;`
180			`tcf_tree_unlock(tp);`
181			`fw_delete_filter(tp, f);`
182			`return 0;`
183			`}`
184			`}`
185			`out:`
186			`return -EINVAL;`
187			`}`
188
189			`static int`
190			`fw_change_attrs(struct tcf_proto tp, struct fw_filter f,`
191			`struct rtattr tb, struct rtattr tca, unsigned long base)`
192			`{`
193			`struct fw_head head = (struct fw_head )tp->root;`
194			`struct tcf_exts e;`
195			`u32 mask;`
196			`int err;`
197
198			`err = tcf_exts_validate(tp, tb, tca[TCA_RATE-1], &e, &fw_ext_map);`
199			`if (err < 0)`
200			`return err;`
201
202			`err = -EINVAL;`
203			`if (tb[TCA_FW_CLASSID-1]) {`
204			`if (RTA_PAYLOAD(tb[TCA_FW_CLASSID-1]) != sizeof(u32))`
205			`goto errout;`
206			`f->res.classid = (u32)RTA_DATA(tb[TCA_FW_CLASSID-1]);`
207			`tcf_bind_filter(tp, &f->res, base);`
208			`}`
209
210			`#ifdef CONFIG_NET_CLS_IND`
211			`if (tb[TCA_FW_INDEV-1]) {`
212			`err = tcf_change_indev(tp, f->indev, tb[TCA_FW_INDEV-1]);`
213			`if (err < 0)`
214			`goto errout;`
215			`}`
216			`#endif /* CONFIG_NET_CLS_IND */`
217
218			`if (tb[TCA_FW_MASK-1]) {`
219			`if (RTA_PAYLOAD(tb[TCA_FW_MASK-1]) != sizeof(u32))`
220			`goto errout;`
221			`mask = (u32)RTA_DATA(tb[TCA_FW_MASK-1]);`
222			`if (mask != head->mask)`
223			`goto errout;`
224			`} else if (head->mask != 0xFFFFFFFF)`
225			`goto errout;`
226
227			`tcf_exts_change(tp, &f->exts, &e);`
228
229			`return 0;`
230			`errout:`
231			`tcf_exts_destroy(tp, &e);`
232			`return err;`
233			`}`
234
235			`static int fw_change(struct tcf_proto *tp, unsigned long base,`
236			`u32 handle,`
237			`struct rtattr **tca,`
238			`unsigned long *arg)`
239			`{`
240			`struct fw_head head = (struct fw_head)tp->root;`
241			`struct fw_filter f = (struct fw_filter ) *arg;`
242			`struct rtattr *opt = tca[TCA_OPTIONS-1];`
243			`struct rtattr *tb[TCA_FW_MAX];`
244			`int err;`
245
246			`if (!opt)`
247			`return handle ? -EINVAL : 0;`
248
249			`if (rtattr_parse_nested(tb, TCA_FW_MAX, opt) < 0)`
250			`return -EINVAL;`
251
252			`if (f != NULL) {`
253			`if (f->id != handle && handle)`
254			`return -EINVAL;`
255			`return fw_change_attrs(tp, f, tb, tca, base);`
256			`}`
257
258			`if (!handle)`
259			`return -EINVAL;`
260
261			`if (head == NULL) {`
262			`u32 mask = 0xFFFFFFFF;`
263			`if (tb[TCA_FW_MASK-1]) {`
264			`if (RTA_PAYLOAD(tb[TCA_FW_MASK-1]) != sizeof(u32))`
265			`return -EINVAL;`
266			`mask = (u32)RTA_DATA(tb[TCA_FW_MASK-1]);`
267			`}`
268
269			`head = kzalloc(sizeof(struct fw_head), GFP_KERNEL);`
270			`if (head == NULL)`
271			`return -ENOBUFS;`
272			`head->mask = mask;`
273
274			`tcf_tree_lock(tp);`
275			`tp->root = head;`
276			`tcf_tree_unlock(tp);`
277			`}`
278
279			`f = kzalloc(sizeof(struct fw_filter), GFP_KERNEL);`
280			`if (f == NULL)`
281			`return -ENOBUFS;`
282
283			`f->id = handle;`
284
285			`err = fw_change_attrs(tp, f, tb, tca, base);`
286			`if (err < 0)`
287			`goto errout;`
288
289			`f->next = head->ht[fw_hash(handle)];`
290			`tcf_tree_lock(tp);`
291			`head->ht[fw_hash(handle)] = f;`
292			`tcf_tree_unlock(tp);`
293
294			`*arg = (unsigned long)f;`
295			`return 0;`
296
297			`errout:`
298			`kfree(f);`
299			`return err;`
300			`}`
301
302			`static void fw_walk(struct tcf_proto tp, struct tcf_walker arg)`
303			`{`
304			`struct fw_head head = (struct fw_head)tp->root;`
305			`int h;`
306
307			`if (head == NULL)`
308			`arg->stop = 1;`
309
310			`if (arg->stop)`
311			`return;`
312
313			`for (h = 0; h < HTSIZE; h++) {`
314			`struct fw_filter *f;`
315
316			`for (f = head->ht[h]; f; f = f->next) {`
317			`if (arg->count < arg->skip) {`
318			`arg->count++;`
319			`continue;`
320			`}`
321			`if (arg->fn(tp, (unsigned long)f, arg) < 0) {`
322			`arg->stop = 1;`
323			`return;`
324			`}`
325			`arg->count++;`
326			`}`
327			`}`
328			`}`
329
330			`static int fw_dump(struct tcf_proto *tp, unsigned long fh,`
331			`struct sk_buff skb, struct tcmsg t)`
332			`{`
333			`struct fw_head head = (struct fw_head )tp->root;`
334			`struct fw_filter f = (struct fw_filter)fh;`
335			`unsigned char *b = skb_tail_pointer(skb);`
336			`struct rtattr *rta;`
337
338			`if (f == NULL)`
339			`return skb->len;`
340
341			`t->tcm_handle = f->id;`
342
343			`if (!f->res.classid && !tcf_exts_is_available(&f->exts))`
344			`return skb->len;`
345
346			`rta = (struct rtattr*)b;`
347			`RTA_PUT(skb, TCA_OPTIONS, 0, NULL);`
348
349			`if (f->res.classid)`
350			`RTA_PUT(skb, TCA_FW_CLASSID, 4, &f->res.classid);`
351			`#ifdef CONFIG_NET_CLS_IND`
352			`if (strlen(f->indev))`
353			`RTA_PUT(skb, TCA_FW_INDEV, IFNAMSIZ, f->indev);`
354			`#endif /* CONFIG_NET_CLS_IND */`
355			`if (head->mask != 0xFFFFFFFF)`
356			`RTA_PUT(skb, TCA_FW_MASK, 4, &head->mask);`
357
358			`if (tcf_exts_dump(skb, &f->exts, &fw_ext_map) < 0)`
359			`goto rtattr_failure;`
360
361			`rta->rta_len = skb_tail_pointer(skb) - b;`
362
363			`if (tcf_exts_dump_stats(skb, &f->exts, &fw_ext_map) < 0)`
364			`goto rtattr_failure;`
365
366			`return skb->len;`
367
368			`rtattr_failure:`
369			`nlmsg_trim(skb, b);`
370			`return -1;`
371			`}`
372
373			`static struct tcf_proto_ops cls_fw_ops = {`
374			`.next = NULL,`
375			`.kind = "fw",`
376			`.classify = fw_classify,`
377			`.init = fw_init,`
378			`.destroy = fw_destroy,`
379			`.get = fw_get,`
380			`.put = fw_put,`
381			`.change = fw_change,`
382			`.delete = fw_delete,`
383			`.walk = fw_walk,`
384			`.dump = fw_dump,`
385			`.owner = THIS_MODULE,`
386			`};`
387
388			`static int __init init_fw(void)`
389			`{`
390			`return register_tcf_proto_ops(&cls_fw_ops);`
391			`}`
392
393			`static void __exit exit_fw(void)`
394			`{`
395			`unregister_tcf_proto_ops(&cls_fw_ops);`
396			`}`
397
398			`module_init(init_fw)`
399			`module_exit(exit_fw)`
400			`MODULE_LICENSE("GPL");`