blob: 1ad3068f2ce16e2c6ba15985c40cf899a7030ba7 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * net/sched/cls_route.c ROUTE4 classifier.
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
12#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090013#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/types.h>
15#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include <linux/string.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/errno.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/skbuff.h>
Patrick McHardy0ba48052007-07-02 22:49:07 -070019#include <net/dst.h>
20#include <net/route.h>
21#include <net/netlink.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <net/act_api.h>
23#include <net/pkt_cls.h>
24
25/*
Eric Dumazetcc7ec452011-01-19 19:26:56 +000026 * 1. For now we assume that route tags < 256.
27 * It allows to use direct table lookups, instead of hash tables.
28 * 2. For now we assume that "from TAG" and "fromdev DEV" statements
29 * are mutually exclusive.
30 * 3. "to TAG from ANY" has higher priority, than "to ANY from XXX"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031 */
32
Eric Dumazetcc7ec452011-01-19 19:26:56 +000033struct route4_fastmap {
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 struct route4_filter *filter;
35 u32 id;
36 int iif;
37};
38
Eric Dumazetcc7ec452011-01-19 19:26:56 +000039struct route4_head {
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 struct route4_fastmap fastmap[16];
Eric Dumazetcc7ec452011-01-19 19:26:56 +000041 struct route4_bucket *table[256 + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -070042};
43
Eric Dumazetcc7ec452011-01-19 19:26:56 +000044struct route4_bucket {
Linus Torvalds1da177e2005-04-16 15:20:36 -070045 /* 16 FROM buckets + 16 IIF buckets + 1 wildcard bucket */
Eric Dumazetcc7ec452011-01-19 19:26:56 +000046 struct route4_filter *ht[16 + 16 + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -070047};
48
Eric Dumazetcc7ec452011-01-19 19:26:56 +000049struct route4_filter {
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 struct route4_filter *next;
51 u32 id;
52 int iif;
53
54 struct tcf_result res;
55 struct tcf_exts exts;
56 u32 handle;
57 struct route4_bucket *bkt;
58};
59
Eric Dumazetcc7ec452011-01-19 19:26:56 +000060#define ROUTE4_FAILURE ((struct route4_filter *)(-1L))
Linus Torvalds1da177e2005-04-16 15:20:36 -070061
Eric Dumazetcc7ec452011-01-19 19:26:56 +000062static inline int route4_fastmap_hash(u32 id, int iif)
Linus Torvalds1da177e2005-04-16 15:20:36 -070063{
Eric Dumazetcc7ec452011-01-19 19:26:56 +000064 return id & 0xF;
Linus Torvalds1da177e2005-04-16 15:20:36 -070065}
66
Eric Dumazetcc7ec452011-01-19 19:26:56 +000067static void
68route4_reset_fastmap(struct Qdisc *q, struct route4_head *head, u32 id)
Linus Torvalds1da177e2005-04-16 15:20:36 -070069{
Jarek Poplawski102396a2008-08-29 14:21:52 -070070 spinlock_t *root_lock = qdisc_root_sleeping_lock(q);
David S. Miller15b458f2008-07-16 02:42:51 -070071
72 spin_lock_bh(root_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 memset(head->fastmap, 0, sizeof(head->fastmap));
David S. Miller15b458f2008-07-16 02:42:51 -070074 spin_unlock_bh(root_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075}
76
Eric Dumazetcc7ec452011-01-19 19:26:56 +000077static void
Linus Torvalds1da177e2005-04-16 15:20:36 -070078route4_set_fastmap(struct route4_head *head, u32 id, int iif,
79 struct route4_filter *f)
80{
81 int h = route4_fastmap_hash(id, iif);
Eric Dumazetcc7ec452011-01-19 19:26:56 +000082
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 head->fastmap[h].id = id;
84 head->fastmap[h].iif = iif;
85 head->fastmap[h].filter = f;
86}
87
Eric Dumazetcc7ec452011-01-19 19:26:56 +000088static inline int route4_hash_to(u32 id)
Linus Torvalds1da177e2005-04-16 15:20:36 -070089{
Eric Dumazetcc7ec452011-01-19 19:26:56 +000090 return id & 0xFF;
Linus Torvalds1da177e2005-04-16 15:20:36 -070091}
92
Eric Dumazetcc7ec452011-01-19 19:26:56 +000093static inline int route4_hash_from(u32 id)
Linus Torvalds1da177e2005-04-16 15:20:36 -070094{
Eric Dumazetcc7ec452011-01-19 19:26:56 +000095 return (id >> 16) & 0xF;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096}
97
Eric Dumazetcc7ec452011-01-19 19:26:56 +000098static inline int route4_hash_iif(int iif)
Linus Torvalds1da177e2005-04-16 15:20:36 -070099{
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000100 return 16 + ((iif >> 16) & 0xF);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101}
102
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000103static inline int route4_hash_wild(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104{
105 return 32;
106}
107
108#define ROUTE4_APPLY_RESULT() \
109{ \
110 *res = f->res; \
111 if (tcf_exts_is_available(&f->exts)) { \
112 int r = tcf_exts_exec(skb, &f->exts, res); \
113 if (r < 0) { \
114 dont_cache = 1; \
115 continue; \
116 } \
117 return r; \
118 } else if (!dont_cache) \
119 route4_set_fastmap(head, id, iif, f); \
120 return 0; \
121}
122
Eric Dumazetdc7f9f62011-07-05 23:25:42 +0000123static int route4_classify(struct sk_buff *skb, const struct tcf_proto *tp,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 struct tcf_result *res)
125{
WANG Conga8701a62014-01-09 16:14:03 -0800126 struct route4_head *head = tp->root;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127 struct dst_entry *dst;
128 struct route4_bucket *b;
129 struct route4_filter *f;
130 u32 id, h;
131 int iif, dont_cache = 0;
132
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000133 dst = skb_dst(skb);
134 if (!dst)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 goto failure;
136
137 id = dst->tclassid;
138 if (head == NULL)
139 goto old_method;
140
David S. Miller92101b32012-07-23 16:29:00 -0700141 iif = inet_iif(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142
143 h = route4_fastmap_hash(id, iif);
144 if (id == head->fastmap[h].id &&
145 iif == head->fastmap[h].iif &&
146 (f = head->fastmap[h].filter) != NULL) {
147 if (f == ROUTE4_FAILURE)
148 goto failure;
149
150 *res = f->res;
151 return 0;
152 }
153
154 h = route4_hash_to(id);
155
156restart:
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000157 b = head->table[h];
158 if (b) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159 for (f = b->ht[route4_hash_from(id)]; f; f = f->next)
160 if (f->id == id)
161 ROUTE4_APPLY_RESULT();
162
163 for (f = b->ht[route4_hash_iif(iif)]; f; f = f->next)
164 if (f->iif == iif)
165 ROUTE4_APPLY_RESULT();
166
167 for (f = b->ht[route4_hash_wild()]; f; f = f->next)
168 ROUTE4_APPLY_RESULT();
169
170 }
171 if (h < 256) {
172 h = 256;
173 id &= ~0xFFFF;
174 goto restart;
175 }
176
177 if (!dont_cache)
178 route4_set_fastmap(head, id, iif, ROUTE4_FAILURE);
179failure:
180 return -1;
181
182old_method:
183 if (id && (TC_H_MAJ(id) == 0 ||
184 !(TC_H_MAJ(id^tp->q->handle)))) {
185 res->classid = id;
186 res->class = 0;
187 return 0;
188 }
189 return -1;
190}
191
192static inline u32 to_hash(u32 id)
193{
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000194 u32 h = id & 0xFF;
195
196 if (id & 0x8000)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 h += 256;
198 return h;
199}
200
201static inline u32 from_hash(u32 id)
202{
203 id &= 0xFFFF;
204 if (id == 0xFFFF)
205 return 32;
206 if (!(id & 0x8000)) {
207 if (id > 255)
208 return 256;
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000209 return id & 0xF;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 }
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000211 return 16 + (id & 0xF);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212}
213
214static unsigned long route4_get(struct tcf_proto *tp, u32 handle)
215{
WANG Conga8701a62014-01-09 16:14:03 -0800216 struct route4_head *head = tp->root;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 struct route4_bucket *b;
218 struct route4_filter *f;
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000219 unsigned int h1, h2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220
221 if (!head)
222 return 0;
223
224 h1 = to_hash(handle);
225 if (h1 > 256)
226 return 0;
227
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000228 h2 = from_hash(handle >> 16);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 if (h2 > 32)
230 return 0;
231
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000232 b = head->table[h1];
233 if (b) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700234 for (f = b->ht[h2]; f; f = f->next)
235 if (f->handle == handle)
236 return (unsigned long)f;
237 }
238 return 0;
239}
240
241static void route4_put(struct tcf_proto *tp, unsigned long f)
242{
243}
244
245static int route4_init(struct tcf_proto *tp)
246{
247 return 0;
248}
249
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000250static void
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251route4_delete_filter(struct tcf_proto *tp, struct route4_filter *f)
252{
253 tcf_unbind_filter(tp, &f->res);
254 tcf_exts_destroy(tp, &f->exts);
255 kfree(f);
256}
257
258static void route4_destroy(struct tcf_proto *tp)
259{
Patrick McHardy47a1a1d2008-11-19 08:03:09 +0000260 struct route4_head *head = tp->root;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 int h1, h2;
262
263 if (head == NULL)
264 return;
265
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000266 for (h1 = 0; h1 <= 256; h1++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 struct route4_bucket *b;
268
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000269 b = head->table[h1];
270 if (b) {
271 for (h2 = 0; h2 <= 32; h2++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 struct route4_filter *f;
273
274 while ((f = b->ht[h2]) != NULL) {
275 b->ht[h2] = f->next;
276 route4_delete_filter(tp, f);
277 }
278 }
279 kfree(b);
280 }
281 }
282 kfree(head);
283}
284
285static int route4_delete(struct tcf_proto *tp, unsigned long arg)
286{
WANG Conga8701a62014-01-09 16:14:03 -0800287 struct route4_head *head = tp->root;
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000288 struct route4_filter **fp, *f = (struct route4_filter *)arg;
289 unsigned int h = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 struct route4_bucket *b;
291 int i;
292
293 if (!head || !f)
294 return -EINVAL;
295
296 h = f->handle;
297 b = f->bkt;
298
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000299 for (fp = &b->ht[from_hash(h >> 16)]; *fp; fp = &(*fp)->next) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 if (*fp == f) {
301 tcf_tree_lock(tp);
302 *fp = f->next;
303 tcf_tree_unlock(tp);
304
David S. Miller15b458f2008-07-16 02:42:51 -0700305 route4_reset_fastmap(tp->q, head, f->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 route4_delete_filter(tp, f);
307
308 /* Strip tree */
309
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000310 for (i = 0; i <= 32; i++)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 if (b->ht[i])
312 return 0;
313
314 /* OK, session has no flows */
315 tcf_tree_lock(tp);
316 head->table[to_hash(h)] = NULL;
317 tcf_tree_unlock(tp);
318
319 kfree(b);
320 return 0;
321 }
322 }
323 return 0;
324}
325
Patrick McHardy6fa8c012008-01-23 20:36:12 -0800326static const struct nla_policy route4_policy[TCA_ROUTE4_MAX + 1] = {
327 [TCA_ROUTE4_CLASSID] = { .type = NLA_U32 },
328 [TCA_ROUTE4_TO] = { .type = NLA_U32 },
329 [TCA_ROUTE4_FROM] = { .type = NLA_U32 },
330 [TCA_ROUTE4_IIF] = { .type = NLA_U32 },
331};
332
Benjamin LaHaisec1b52732013-01-14 05:15:39 +0000333static int route4_set_parms(struct net *net, struct tcf_proto *tp,
334 unsigned long base, struct route4_filter *f,
335 u32 handle, struct route4_head *head,
336 struct nlattr **tb, struct nlattr *est, int new)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337{
338 int err;
339 u32 id = 0, to = 0, nhandle = 0x8000;
340 struct route4_filter *fp;
341 unsigned int h1;
342 struct route4_bucket *b;
343 struct tcf_exts e;
344
WANG Cong5da57f42013-12-15 20:15:07 -0800345 tcf_exts_init(&e, TCA_ROUTE4_ACT, TCA_ROUTE4_POLICE);
346 err = tcf_exts_validate(net, tp, tb, est, &e);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 if (err < 0)
348 return err;
349
350 err = -EINVAL;
Patrick McHardyadd93b62008-01-22 22:11:33 -0800351 if (tb[TCA_ROUTE4_TO]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 if (new && handle & 0x8000)
353 goto errout;
Patrick McHardy1587bac2008-01-23 20:35:03 -0800354 to = nla_get_u32(tb[TCA_ROUTE4_TO]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 if (to > 0xFF)
356 goto errout;
357 nhandle = to;
358 }
359
Patrick McHardyadd93b62008-01-22 22:11:33 -0800360 if (tb[TCA_ROUTE4_FROM]) {
361 if (tb[TCA_ROUTE4_IIF])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 goto errout;
Patrick McHardy1587bac2008-01-23 20:35:03 -0800363 id = nla_get_u32(tb[TCA_ROUTE4_FROM]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 if (id > 0xFF)
365 goto errout;
366 nhandle |= id << 16;
Patrick McHardyadd93b62008-01-22 22:11:33 -0800367 } else if (tb[TCA_ROUTE4_IIF]) {
Patrick McHardy1587bac2008-01-23 20:35:03 -0800368 id = nla_get_u32(tb[TCA_ROUTE4_IIF]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700369 if (id > 0x7FFF)
370 goto errout;
371 nhandle |= (id | 0x8000) << 16;
372 } else
373 nhandle |= 0xFFFF << 16;
374
375 if (handle && new) {
376 nhandle |= handle & 0x7F00;
377 if (nhandle != handle)
378 goto errout;
379 }
380
381 h1 = to_hash(nhandle);
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000382 b = head->table[h1];
383 if (!b) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 err = -ENOBUFS;
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700385 b = kzalloc(sizeof(struct route4_bucket), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386 if (b == NULL)
387 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
389 tcf_tree_lock(tp);
390 head->table[h1] = b;
391 tcf_tree_unlock(tp);
392 } else {
393 unsigned int h2 = from_hash(nhandle >> 16);
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000394
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395 err = -EEXIST;
396 for (fp = b->ht[h2]; fp; fp = fp->next)
397 if (fp->handle == f->handle)
398 goto errout;
399 }
400
401 tcf_tree_lock(tp);
Patrick McHardyadd93b62008-01-22 22:11:33 -0800402 if (tb[TCA_ROUTE4_TO])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 f->id = to;
404
Patrick McHardyadd93b62008-01-22 22:11:33 -0800405 if (tb[TCA_ROUTE4_FROM])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406 f->id = to | id<<16;
Patrick McHardyadd93b62008-01-22 22:11:33 -0800407 else if (tb[TCA_ROUTE4_IIF])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 f->iif = id;
409
410 f->handle = nhandle;
411 f->bkt = b;
412 tcf_tree_unlock(tp);
413
Patrick McHardyadd93b62008-01-22 22:11:33 -0800414 if (tb[TCA_ROUTE4_CLASSID]) {
Patrick McHardy1587bac2008-01-23 20:35:03 -0800415 f->res.classid = nla_get_u32(tb[TCA_ROUTE4_CLASSID]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 tcf_bind_filter(tp, &f->res, base);
417 }
418
419 tcf_exts_change(tp, &f->exts, &e);
420
421 return 0;
422errout:
423 tcf_exts_destroy(tp, &e);
424 return err;
425}
426
Benjamin LaHaisec1b52732013-01-14 05:15:39 +0000427static int route4_change(struct net *net, struct sk_buff *in_skb,
Eric W. Biedermanaf4c6642012-05-25 13:42:45 -0600428 struct tcf_proto *tp, unsigned long base,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 u32 handle,
Patrick McHardyadd93b62008-01-22 22:11:33 -0800430 struct nlattr **tca,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431 unsigned long *arg)
432{
433 struct route4_head *head = tp->root;
434 struct route4_filter *f, *f1, **fp;
435 struct route4_bucket *b;
Patrick McHardyadd93b62008-01-22 22:11:33 -0800436 struct nlattr *opt = tca[TCA_OPTIONS];
437 struct nlattr *tb[TCA_ROUTE4_MAX + 1];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700438 unsigned int h, th;
439 u32 old_handle = 0;
440 int err;
441
442 if (opt == NULL)
443 return handle ? -EINVAL : 0;
444
Patrick McHardy6fa8c012008-01-23 20:36:12 -0800445 err = nla_parse_nested(tb, TCA_ROUTE4_MAX, opt, route4_policy);
Patrick McHardycee63722008-01-23 20:33:32 -0800446 if (err < 0)
447 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000449 f = (struct route4_filter *)*arg;
450 if (f) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 if (f->handle != handle && handle)
452 return -EINVAL;
453
454 if (f->bkt)
455 old_handle = f->handle;
456
Benjamin LaHaisec1b52732013-01-14 05:15:39 +0000457 err = route4_set_parms(net, tp, base, f, handle, head, tb,
Patrick McHardyadd93b62008-01-22 22:11:33 -0800458 tca[TCA_RATE], 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459 if (err < 0)
460 return err;
461
462 goto reinsert;
463 }
464
465 err = -ENOBUFS;
466 if (head == NULL) {
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700467 head = kzalloc(sizeof(struct route4_head), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 if (head == NULL)
469 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
471 tcf_tree_lock(tp);
472 tp->root = head;
473 tcf_tree_unlock(tp);
474 }
475
Panagiotis Issaris0da974f2006-07-21 14:51:30 -0700476 f = kzalloc(sizeof(struct route4_filter), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700477 if (f == NULL)
478 goto errout;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479
WANG Cong5da57f42013-12-15 20:15:07 -0800480 tcf_exts_init(&f->exts, TCA_ROUTE4_ACT, TCA_ROUTE4_POLICE);
Benjamin LaHaisec1b52732013-01-14 05:15:39 +0000481 err = route4_set_parms(net, tp, base, f, handle, head, tb,
Patrick McHardyadd93b62008-01-22 22:11:33 -0800482 tca[TCA_RATE], 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 if (err < 0)
484 goto errout;
485
486reinsert:
487 h = from_hash(f->handle >> 16);
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000488 for (fp = &f->bkt->ht[h]; (f1 = *fp) != NULL; fp = &f1->next)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 if (f->handle < f1->handle)
490 break;
491
492 f->next = f1;
493 tcf_tree_lock(tp);
494 *fp = f;
495
496 if (old_handle && f->handle != old_handle) {
497 th = to_hash(old_handle);
498 h = from_hash(old_handle >> 16);
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000499 b = head->table[th];
500 if (b) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 for (fp = &b->ht[h]; *fp; fp = &(*fp)->next) {
502 if (*fp == f) {
503 *fp = f->next;
504 break;
505 }
506 }
507 }
508 }
509 tcf_tree_unlock(tp);
510
David S. Miller15b458f2008-07-16 02:42:51 -0700511 route4_reset_fastmap(tp->q, head, f->id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 *arg = (unsigned long)f;
513 return 0;
514
515errout:
Jesper Juhla51482b2005-11-08 09:41:34 -0800516 kfree(f);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 return err;
518}
519
520static void route4_walk(struct tcf_proto *tp, struct tcf_walker *arg)
521{
522 struct route4_head *head = tp->root;
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000523 unsigned int h, h1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524
525 if (head == NULL)
526 arg->stop = 1;
527
528 if (arg->stop)
529 return;
530
531 for (h = 0; h <= 256; h++) {
532 struct route4_bucket *b = head->table[h];
533
534 if (b) {
535 for (h1 = 0; h1 <= 32; h1++) {
536 struct route4_filter *f;
537
538 for (f = b->ht[h1]; f; f = f->next) {
539 if (arg->count < arg->skip) {
540 arg->count++;
541 continue;
542 }
543 if (arg->fn(tp, (unsigned long)f, arg) < 0) {
544 arg->stop = 1;
545 return;
546 }
547 arg->count++;
548 }
549 }
550 }
551 }
552}
553
WANG Cong832d1d52014-01-09 16:14:01 -0800554static int route4_dump(struct net *net, struct tcf_proto *tp, unsigned long fh,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 struct sk_buff *skb, struct tcmsg *t)
556{
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000557 struct route4_filter *f = (struct route4_filter *)fh;
Arnaldo Carvalho de Melo27a884d2007-04-19 20:29:13 -0700558 unsigned char *b = skb_tail_pointer(skb);
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800559 struct nlattr *nest;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 u32 id;
561
562 if (f == NULL)
563 return skb->len;
564
565 t->tcm_handle = f->handle;
566
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800567 nest = nla_nest_start(skb, TCA_OPTIONS);
568 if (nest == NULL)
569 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000571 if (!(f->handle & 0x8000)) {
572 id = f->id & 0xFF;
David S. Miller1b34ec42012-03-29 05:11:39 -0400573 if (nla_put_u32(skb, TCA_ROUTE4_TO, id))
574 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 }
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000576 if (f->handle & 0x80000000) {
David S. Miller1b34ec42012-03-29 05:11:39 -0400577 if ((f->handle >> 16) != 0xFFFF &&
578 nla_put_u32(skb, TCA_ROUTE4_IIF, f->iif))
579 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 } else {
Eric Dumazetcc7ec452011-01-19 19:26:56 +0000581 id = f->id >> 16;
David S. Miller1b34ec42012-03-29 05:11:39 -0400582 if (nla_put_u32(skb, TCA_ROUTE4_FROM, id))
583 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 }
David S. Miller1b34ec42012-03-29 05:11:39 -0400585 if (f->res.classid &&
586 nla_put_u32(skb, TCA_ROUTE4_CLASSID, f->res.classid))
587 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588
WANG Cong5da57f42013-12-15 20:15:07 -0800589 if (tcf_exts_dump(skb, &f->exts) < 0)
Patrick McHardyadd93b62008-01-22 22:11:33 -0800590 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700591
Patrick McHardy4b3550ef2008-01-23 20:34:11 -0800592 nla_nest_end(skb, nest);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593
WANG Cong5da57f42013-12-15 20:15:07 -0800594 if (tcf_exts_dump_stats(skb, &f->exts) < 0)
Patrick McHardyadd93b62008-01-22 22:11:33 -0800595 goto nla_put_failure;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596
597 return skb->len;
598
Patrick McHardyadd93b62008-01-22 22:11:33 -0800599nla_put_failure:
Arnaldo Carvalho de Melodc5fc572007-03-25 23:06:12 -0700600 nlmsg_trim(skb, b);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601 return -1;
602}
603
Patrick McHardy2eb9d752008-01-22 22:10:42 -0800604static struct tcf_proto_ops cls_route4_ops __read_mostly = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 .kind = "route",
606 .classify = route4_classify,
607 .init = route4_init,
608 .destroy = route4_destroy,
609 .get = route4_get,
610 .put = route4_put,
611 .change = route4_change,
612 .delete = route4_delete,
613 .walk = route4_walk,
614 .dump = route4_dump,
615 .owner = THIS_MODULE,
616};
617
618static int __init init_route4(void)
619{
620 return register_tcf_proto_ops(&cls_route4_ops);
621}
622
623static void __exit exit_route4(void)
624{
625 unregister_tcf_proto_ops(&cls_route4_ops);
626}
627
628module_init(init_route4)
629module_exit(exit_route4)
630MODULE_LICENSE("GPL");