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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * net/sched/cls_rsvp.h Template file for RSVPv[46] classifiers. | |
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 | /* | |
13 | Comparing to general packet classification problem, | |
14 | RSVP needs only sevaral relatively simple rules: | |
15 | ||
16 | * (dst, protocol) are always specified, | |
17 | so that we are able to hash them. | |
18 | * src may be exact, or may be wildcard, so that | |
19 | we can keep a hash table plus one wildcard entry. | |
20 | * source port (or flow label) is important only if src is given. | |
21 | ||
22 | IMPLEMENTATION. | |
23 | ||
24 | We use a two level hash table: The top level is keyed by | |
25 | destination address and protocol ID, every bucket contains a list | |
26 | of "rsvp sessions", identified by destination address, protocol and | |
27 | DPI(="Destination Port ID"): triple (key, mask, offset). | |
28 | ||
29 | Every bucket has a smaller hash table keyed by source address | |
30 | (cf. RSVP flowspec) and one wildcard entry for wildcard reservations. | |
31 | Every bucket is again a list of "RSVP flows", selected by | |
32 | source address and SPI(="Source Port ID" here rather than | |
33 | "security parameter index"): triple (key, mask, offset). | |
34 | ||
35 | ||
36 | NOTE 1. All the packets with IPv6 extension headers (but AH and ESP) | |
37 | and all fragmented packets go to the best-effort traffic class. | |
38 | ||
39 | ||
40 | NOTE 2. Two "port id"'s seems to be redundant, rfc2207 requires | |
41 | only one "Generalized Port Identifier". So that for classic | |
42 | ah, esp (and udp,tcp) both *pi should coincide or one of them | |
43 | should be wildcard. | |
44 | ||
45 | At first sight, this redundancy is just a waste of CPU | |
46 | resources. But DPI and SPI add the possibility to assign different | |
47 | priorities to GPIs. Look also at note 4 about tunnels below. | |
48 | ||
49 | ||
50 | NOTE 3. One complication is the case of tunneled packets. | |
51 | We implement it as following: if the first lookup | |
52 | matches a special session with "tunnelhdr" value not zero, | |
53 | flowid doesn't contain the true flow ID, but the tunnel ID (1...255). | |
54 | In this case, we pull tunnelhdr bytes and restart lookup | |
55 | with tunnel ID added to the list of keys. Simple and stupid 8)8) | |
56 | It's enough for PIMREG and IPIP. | |
57 | ||
58 | ||
59 | NOTE 4. Two GPIs make it possible to parse even GRE packets. | |
60 | F.e. DPI can select ETH_P_IP (and necessary flags to make | |
61 | tunnelhdr correct) in GRE protocol field and SPI matches | |
62 | GRE key. Is it not nice? 8)8) | |
63 | ||
64 | ||
65 | Well, as result, despite its simplicity, we get a pretty | |
66 | powerful classification engine. */ | |
67 | ||
1da177e4 LT |
68 | |
69 | struct rsvp_head | |
70 | { | |
71 | u32 tmap[256/32]; | |
72 | u32 hgenerator; | |
73 | u8 tgenerator; | |
74 | struct rsvp_session *ht[256]; | |
75 | }; | |
76 | ||
77 | struct rsvp_session | |
78 | { | |
79 | struct rsvp_session *next; | |
66c6f529 | 80 | __be32 dst[RSVP_DST_LEN]; |
1da177e4 LT |
81 | struct tc_rsvp_gpi dpi; |
82 | u8 protocol; | |
83 | u8 tunnelid; | |
84 | /* 16 (src,sport) hash slots, and one wildcard source slot */ | |
85 | struct rsvp_filter *ht[16+1]; | |
86 | }; | |
87 | ||
88 | ||
89 | struct rsvp_filter | |
90 | { | |
91 | struct rsvp_filter *next; | |
66c6f529 | 92 | __be32 src[RSVP_DST_LEN]; |
1da177e4 LT |
93 | struct tc_rsvp_gpi spi; |
94 | u8 tunnelhdr; | |
95 | ||
96 | struct tcf_result res; | |
97 | struct tcf_exts exts; | |
98 | ||
99 | u32 handle; | |
100 | struct rsvp_session *sess; | |
101 | }; | |
102 | ||
66c6f529 | 103 | static __inline__ unsigned hash_dst(__be32 *dst, u8 protocol, u8 tunnelid) |
1da177e4 | 104 | { |
66c6f529 | 105 | unsigned h = (__force __u32)dst[RSVP_DST_LEN-1]; |
1da177e4 LT |
106 | h ^= h>>16; |
107 | h ^= h>>8; | |
108 | return (h ^ protocol ^ tunnelid) & 0xFF; | |
109 | } | |
110 | ||
66c6f529 | 111 | static __inline__ unsigned hash_src(__be32 *src) |
1da177e4 | 112 | { |
66c6f529 | 113 | unsigned h = (__force __u32)src[RSVP_DST_LEN-1]; |
1da177e4 LT |
114 | h ^= h>>16; |
115 | h ^= h>>8; | |
116 | h ^= h>>4; | |
117 | return h & 0xF; | |
118 | } | |
119 | ||
120 | static struct tcf_ext_map rsvp_ext_map = { | |
121 | .police = TCA_RSVP_POLICE, | |
122 | .action = TCA_RSVP_ACT | |
123 | }; | |
124 | ||
125 | #define RSVP_APPLY_RESULT() \ | |
126 | { \ | |
127 | int r = tcf_exts_exec(skb, &f->exts, res); \ | |
128 | if (r < 0) \ | |
129 | continue; \ | |
130 | else if (r > 0) \ | |
131 | return r; \ | |
132 | } | |
10297b99 | 133 | |
1da177e4 LT |
134 | static int rsvp_classify(struct sk_buff *skb, struct tcf_proto *tp, |
135 | struct tcf_result *res) | |
136 | { | |
137 | struct rsvp_session **sht = ((struct rsvp_head*)tp->root)->ht; | |
138 | struct rsvp_session *s; | |
139 | struct rsvp_filter *f; | |
140 | unsigned h1, h2; | |
66c6f529 | 141 | __be32 *dst, *src; |
1da177e4 LT |
142 | u8 protocol; |
143 | u8 tunnelid = 0; | |
144 | u8 *xprt; | |
145 | #if RSVP_DST_LEN == 4 | |
0660e03f | 146 | struct ipv6hdr *nhptr = ipv6_hdr(skb); |
1da177e4 | 147 | #else |
eddc9ec5 | 148 | struct iphdr *nhptr = ip_hdr(skb); |
1da177e4 LT |
149 | #endif |
150 | ||
151 | restart: | |
152 | ||
153 | #if RSVP_DST_LEN == 4 | |
154 | src = &nhptr->saddr.s6_addr32[0]; | |
155 | dst = &nhptr->daddr.s6_addr32[0]; | |
156 | protocol = nhptr->nexthdr; | |
157 | xprt = ((u8*)nhptr) + sizeof(struct ipv6hdr); | |
158 | #else | |
159 | src = &nhptr->saddr; | |
160 | dst = &nhptr->daddr; | |
161 | protocol = nhptr->protocol; | |
162 | xprt = ((u8*)nhptr) + (nhptr->ihl<<2); | |
b6d9bcb0 | 163 | if (nhptr->frag_off & htons(IP_MF|IP_OFFSET)) |
1da177e4 LT |
164 | return -1; |
165 | #endif | |
166 | ||
167 | h1 = hash_dst(dst, protocol, tunnelid); | |
168 | h2 = hash_src(src); | |
169 | ||
170 | for (s = sht[h1]; s; s = s->next) { | |
171 | if (dst[RSVP_DST_LEN-1] == s->dst[RSVP_DST_LEN-1] && | |
172 | protocol == s->protocol && | |
f64f9e71 JP |
173 | !(s->dpi.mask & |
174 | (*(u32*)(xprt+s->dpi.offset)^s->dpi.key)) && | |
1da177e4 | 175 | #if RSVP_DST_LEN == 4 |
f64f9e71 JP |
176 | dst[0] == s->dst[0] && |
177 | dst[1] == s->dst[1] && | |
178 | dst[2] == s->dst[2] && | |
1da177e4 | 179 | #endif |
f64f9e71 | 180 | tunnelid == s->tunnelid) { |
1da177e4 LT |
181 | |
182 | for (f = s->ht[h2]; f; f = f->next) { | |
183 | if (src[RSVP_DST_LEN-1] == f->src[RSVP_DST_LEN-1] && | |
184 | !(f->spi.mask & (*(u32*)(xprt+f->spi.offset)^f->spi.key)) | |
185 | #if RSVP_DST_LEN == 4 | |
f64f9e71 JP |
186 | && |
187 | src[0] == f->src[0] && | |
188 | src[1] == f->src[1] && | |
189 | src[2] == f->src[2] | |
1da177e4 LT |
190 | #endif |
191 | ) { | |
192 | *res = f->res; | |
193 | RSVP_APPLY_RESULT(); | |
194 | ||
195 | matched: | |
196 | if (f->tunnelhdr == 0) | |
197 | return 0; | |
198 | ||
199 | tunnelid = f->res.classid; | |
200 | nhptr = (void*)(xprt + f->tunnelhdr - sizeof(*nhptr)); | |
201 | goto restart; | |
202 | } | |
203 | } | |
204 | ||
205 | /* And wildcard bucket... */ | |
206 | for (f = s->ht[16]; f; f = f->next) { | |
207 | *res = f->res; | |
208 | RSVP_APPLY_RESULT(); | |
209 | goto matched; | |
210 | } | |
211 | return -1; | |
212 | } | |
213 | } | |
214 | return -1; | |
215 | } | |
216 | ||
217 | static unsigned long rsvp_get(struct tcf_proto *tp, u32 handle) | |
218 | { | |
219 | struct rsvp_session **sht = ((struct rsvp_head*)tp->root)->ht; | |
220 | struct rsvp_session *s; | |
221 | struct rsvp_filter *f; | |
222 | unsigned h1 = handle&0xFF; | |
223 | unsigned h2 = (handle>>8)&0xFF; | |
224 | ||
225 | if (h2 > 16) | |
226 | return 0; | |
227 | ||
228 | for (s = sht[h1]; s; s = s->next) { | |
229 | for (f = s->ht[h2]; f; f = f->next) { | |
230 | if (f->handle == handle) | |
231 | return (unsigned long)f; | |
232 | } | |
233 | } | |
234 | return 0; | |
235 | } | |
236 | ||
237 | static void rsvp_put(struct tcf_proto *tp, unsigned long f) | |
238 | { | |
239 | } | |
240 | ||
241 | static int rsvp_init(struct tcf_proto *tp) | |
242 | { | |
243 | struct rsvp_head *data; | |
244 | ||
0da974f4 | 245 | data = kzalloc(sizeof(struct rsvp_head), GFP_KERNEL); |
1da177e4 | 246 | if (data) { |
1da177e4 LT |
247 | tp->root = data; |
248 | return 0; | |
249 | } | |
250 | return -ENOBUFS; | |
251 | } | |
252 | ||
253 | static inline void | |
254 | rsvp_delete_filter(struct tcf_proto *tp, struct rsvp_filter *f) | |
255 | { | |
256 | tcf_unbind_filter(tp, &f->res); | |
257 | tcf_exts_destroy(tp, &f->exts); | |
258 | kfree(f); | |
259 | } | |
260 | ||
261 | static void rsvp_destroy(struct tcf_proto *tp) | |
262 | { | |
263 | struct rsvp_head *data = xchg(&tp->root, NULL); | |
264 | struct rsvp_session **sht; | |
265 | int h1, h2; | |
266 | ||
267 | if (data == NULL) | |
268 | return; | |
269 | ||
270 | sht = data->ht; | |
271 | ||
272 | for (h1=0; h1<256; h1++) { | |
273 | struct rsvp_session *s; | |
274 | ||
275 | while ((s = sht[h1]) != NULL) { | |
276 | sht[h1] = s->next; | |
277 | ||
278 | for (h2=0; h2<=16; h2++) { | |
279 | struct rsvp_filter *f; | |
280 | ||
281 | while ((f = s->ht[h2]) != NULL) { | |
282 | s->ht[h2] = f->next; | |
283 | rsvp_delete_filter(tp, f); | |
284 | } | |
285 | } | |
286 | kfree(s); | |
287 | } | |
288 | } | |
289 | kfree(data); | |
290 | } | |
291 | ||
292 | static int rsvp_delete(struct tcf_proto *tp, unsigned long arg) | |
293 | { | |
294 | struct rsvp_filter **fp, *f = (struct rsvp_filter*)arg; | |
295 | unsigned h = f->handle; | |
296 | struct rsvp_session **sp; | |
297 | struct rsvp_session *s = f->sess; | |
298 | int i; | |
299 | ||
300 | for (fp = &s->ht[(h>>8)&0xFF]; *fp; fp = &(*fp)->next) { | |
301 | if (*fp == f) { | |
302 | tcf_tree_lock(tp); | |
303 | *fp = f->next; | |
304 | tcf_tree_unlock(tp); | |
305 | rsvp_delete_filter(tp, f); | |
306 | ||
307 | /* Strip tree */ | |
308 | ||
309 | for (i=0; i<=16; i++) | |
310 | if (s->ht[i]) | |
311 | return 0; | |
312 | ||
313 | /* OK, session has no flows */ | |
314 | for (sp = &((struct rsvp_head*)tp->root)->ht[h&0xFF]; | |
315 | *sp; sp = &(*sp)->next) { | |
316 | if (*sp == s) { | |
317 | tcf_tree_lock(tp); | |
318 | *sp = s->next; | |
319 | tcf_tree_unlock(tp); | |
320 | ||
321 | kfree(s); | |
322 | return 0; | |
323 | } | |
324 | } | |
325 | ||
326 | return 0; | |
327 | } | |
328 | } | |
329 | return 0; | |
330 | } | |
331 | ||
332 | static unsigned gen_handle(struct tcf_proto *tp, unsigned salt) | |
333 | { | |
334 | struct rsvp_head *data = tp->root; | |
335 | int i = 0xFFFF; | |
336 | ||
337 | while (i-- > 0) { | |
338 | u32 h; | |
339 | if ((data->hgenerator += 0x10000) == 0) | |
340 | data->hgenerator = 0x10000; | |
341 | h = data->hgenerator|salt; | |
342 | if (rsvp_get(tp, h) == 0) | |
343 | return h; | |
344 | } | |
345 | return 0; | |
346 | } | |
347 | ||
348 | static int tunnel_bts(struct rsvp_head *data) | |
349 | { | |
350 | int n = data->tgenerator>>5; | |
351 | u32 b = 1<<(data->tgenerator&0x1F); | |
10297b99 | 352 | |
1da177e4 LT |
353 | if (data->tmap[n]&b) |
354 | return 0; | |
355 | data->tmap[n] |= b; | |
356 | return 1; | |
357 | } | |
358 | ||
359 | static void tunnel_recycle(struct rsvp_head *data) | |
360 | { | |
361 | struct rsvp_session **sht = data->ht; | |
362 | u32 tmap[256/32]; | |
363 | int h1, h2; | |
364 | ||
365 | memset(tmap, 0, sizeof(tmap)); | |
366 | ||
367 | for (h1=0; h1<256; h1++) { | |
368 | struct rsvp_session *s; | |
369 | for (s = sht[h1]; s; s = s->next) { | |
370 | for (h2=0; h2<=16; h2++) { | |
371 | struct rsvp_filter *f; | |
372 | ||
373 | for (f = s->ht[h2]; f; f = f->next) { | |
374 | if (f->tunnelhdr == 0) | |
375 | continue; | |
376 | data->tgenerator = f->res.classid; | |
377 | tunnel_bts(data); | |
378 | } | |
379 | } | |
380 | } | |
381 | } | |
382 | ||
383 | memcpy(data->tmap, tmap, sizeof(tmap)); | |
384 | } | |
385 | ||
386 | static u32 gen_tunnel(struct rsvp_head *data) | |
387 | { | |
388 | int i, k; | |
389 | ||
390 | for (k=0; k<2; k++) { | |
391 | for (i=255; i>0; i--) { | |
392 | if (++data->tgenerator == 0) | |
393 | data->tgenerator = 1; | |
394 | if (tunnel_bts(data)) | |
395 | return data->tgenerator; | |
396 | } | |
397 | tunnel_recycle(data); | |
398 | } | |
399 | return 0; | |
400 | } | |
401 | ||
6fa8c014 PM |
402 | static const struct nla_policy rsvp_policy[TCA_RSVP_MAX + 1] = { |
403 | [TCA_RSVP_CLASSID] = { .type = NLA_U32 }, | |
404 | [TCA_RSVP_DST] = { .type = NLA_BINARY, | |
405 | .len = RSVP_DST_LEN * sizeof(u32) }, | |
406 | [TCA_RSVP_SRC] = { .type = NLA_BINARY, | |
407 | .len = RSVP_DST_LEN * sizeof(u32) }, | |
408 | [TCA_RSVP_PINFO] = { .len = sizeof(struct tc_rsvp_pinfo) }, | |
409 | }; | |
410 | ||
1da177e4 LT |
411 | static int rsvp_change(struct tcf_proto *tp, unsigned long base, |
412 | u32 handle, | |
add93b61 | 413 | struct nlattr **tca, |
1da177e4 LT |
414 | unsigned long *arg) |
415 | { | |
416 | struct rsvp_head *data = tp->root; | |
417 | struct rsvp_filter *f, **fp; | |
418 | struct rsvp_session *s, **sp; | |
419 | struct tc_rsvp_pinfo *pinfo = NULL; | |
add93b61 PM |
420 | struct nlattr *opt = tca[TCA_OPTIONS-1]; |
421 | struct nlattr *tb[TCA_RSVP_MAX + 1]; | |
1da177e4 LT |
422 | struct tcf_exts e; |
423 | unsigned h1, h2; | |
66c6f529 | 424 | __be32 *dst; |
1da177e4 LT |
425 | int err; |
426 | ||
427 | if (opt == NULL) | |
428 | return handle ? -EINVAL : 0; | |
429 | ||
6fa8c014 | 430 | err = nla_parse_nested(tb, TCA_RSVP_MAX, opt, rsvp_policy); |
cee63723 PM |
431 | if (err < 0) |
432 | return err; | |
1da177e4 LT |
433 | |
434 | err = tcf_exts_validate(tp, tb, tca[TCA_RATE-1], &e, &rsvp_ext_map); | |
435 | if (err < 0) | |
436 | return err; | |
437 | ||
438 | if ((f = (struct rsvp_filter*)*arg) != NULL) { | |
439 | /* Node exists: adjust only classid */ | |
440 | ||
441 | if (f->handle != handle && handle) | |
442 | goto errout2; | |
443 | if (tb[TCA_RSVP_CLASSID-1]) { | |
1587bac4 | 444 | f->res.classid = nla_get_u32(tb[TCA_RSVP_CLASSID-1]); |
1da177e4 LT |
445 | tcf_bind_filter(tp, &f->res, base); |
446 | } | |
447 | ||
448 | tcf_exts_change(tp, &f->exts, &e); | |
449 | return 0; | |
450 | } | |
451 | ||
452 | /* Now more serious part... */ | |
453 | err = -EINVAL; | |
454 | if (handle) | |
455 | goto errout2; | |
456 | if (tb[TCA_RSVP_DST-1] == NULL) | |
457 | goto errout2; | |
458 | ||
459 | err = -ENOBUFS; | |
0da974f4 | 460 | f = kzalloc(sizeof(struct rsvp_filter), GFP_KERNEL); |
1da177e4 LT |
461 | if (f == NULL) |
462 | goto errout2; | |
463 | ||
1da177e4 LT |
464 | h2 = 16; |
465 | if (tb[TCA_RSVP_SRC-1]) { | |
add93b61 | 466 | memcpy(f->src, nla_data(tb[TCA_RSVP_SRC-1]), sizeof(f->src)); |
1da177e4 LT |
467 | h2 = hash_src(f->src); |
468 | } | |
469 | if (tb[TCA_RSVP_PINFO-1]) { | |
add93b61 | 470 | pinfo = nla_data(tb[TCA_RSVP_PINFO-1]); |
1da177e4 LT |
471 | f->spi = pinfo->spi; |
472 | f->tunnelhdr = pinfo->tunnelhdr; | |
473 | } | |
6fa8c014 | 474 | if (tb[TCA_RSVP_CLASSID-1]) |
1587bac4 | 475 | f->res.classid = nla_get_u32(tb[TCA_RSVP_CLASSID-1]); |
1da177e4 | 476 | |
add93b61 | 477 | dst = nla_data(tb[TCA_RSVP_DST-1]); |
1da177e4 LT |
478 | h1 = hash_dst(dst, pinfo ? pinfo->protocol : 0, pinfo ? pinfo->tunnelid : 0); |
479 | ||
480 | err = -ENOMEM; | |
481 | if ((f->handle = gen_handle(tp, h1 | (h2<<8))) == 0) | |
482 | goto errout; | |
483 | ||
484 | if (f->tunnelhdr) { | |
485 | err = -EINVAL; | |
486 | if (f->res.classid > 255) | |
487 | goto errout; | |
488 | ||
489 | err = -ENOMEM; | |
490 | if (f->res.classid == 0 && | |
491 | (f->res.classid = gen_tunnel(data)) == 0) | |
492 | goto errout; | |
493 | } | |
494 | ||
495 | for (sp = &data->ht[h1]; (s=*sp) != NULL; sp = &s->next) { | |
496 | if (dst[RSVP_DST_LEN-1] == s->dst[RSVP_DST_LEN-1] && | |
497 | pinfo && pinfo->protocol == s->protocol && | |
f64f9e71 | 498 | memcmp(&pinfo->dpi, &s->dpi, sizeof(s->dpi)) == 0 && |
1da177e4 | 499 | #if RSVP_DST_LEN == 4 |
f64f9e71 JP |
500 | dst[0] == s->dst[0] && |
501 | dst[1] == s->dst[1] && | |
502 | dst[2] == s->dst[2] && | |
1da177e4 | 503 | #endif |
f64f9e71 | 504 | pinfo->tunnelid == s->tunnelid) { |
1da177e4 LT |
505 | |
506 | insert: | |
507 | /* OK, we found appropriate session */ | |
508 | ||
509 | fp = &s->ht[h2]; | |
510 | ||
511 | f->sess = s; | |
512 | if (f->tunnelhdr == 0) | |
513 | tcf_bind_filter(tp, &f->res, base); | |
514 | ||
515 | tcf_exts_change(tp, &f->exts, &e); | |
516 | ||
517 | for (fp = &s->ht[h2]; *fp; fp = &(*fp)->next) | |
518 | if (((*fp)->spi.mask&f->spi.mask) != f->spi.mask) | |
519 | break; | |
520 | f->next = *fp; | |
521 | wmb(); | |
522 | *fp = f; | |
523 | ||
524 | *arg = (unsigned long)f; | |
525 | return 0; | |
526 | } | |
527 | } | |
528 | ||
529 | /* No session found. Create new one. */ | |
530 | ||
531 | err = -ENOBUFS; | |
0da974f4 | 532 | s = kzalloc(sizeof(struct rsvp_session), GFP_KERNEL); |
1da177e4 LT |
533 | if (s == NULL) |
534 | goto errout; | |
1da177e4 LT |
535 | memcpy(s->dst, dst, sizeof(s->dst)); |
536 | ||
537 | if (pinfo) { | |
538 | s->dpi = pinfo->dpi; | |
539 | s->protocol = pinfo->protocol; | |
540 | s->tunnelid = pinfo->tunnelid; | |
541 | } | |
542 | for (sp = &data->ht[h1]; *sp; sp = &(*sp)->next) { | |
543 | if (((*sp)->dpi.mask&s->dpi.mask) != s->dpi.mask) | |
544 | break; | |
545 | } | |
546 | s->next = *sp; | |
547 | wmb(); | |
548 | *sp = s; | |
10297b99 | 549 | |
1da177e4 LT |
550 | goto insert; |
551 | ||
552 | errout: | |
a51482bd | 553 | kfree(f); |
1da177e4 LT |
554 | errout2: |
555 | tcf_exts_destroy(tp, &e); | |
556 | return err; | |
557 | } | |
558 | ||
559 | static void rsvp_walk(struct tcf_proto *tp, struct tcf_walker *arg) | |
560 | { | |
561 | struct rsvp_head *head = tp->root; | |
562 | unsigned h, h1; | |
563 | ||
564 | if (arg->stop) | |
565 | return; | |
566 | ||
567 | for (h = 0; h < 256; h++) { | |
568 | struct rsvp_session *s; | |
569 | ||
570 | for (s = head->ht[h]; s; s = s->next) { | |
571 | for (h1 = 0; h1 <= 16; h1++) { | |
572 | struct rsvp_filter *f; | |
573 | ||
574 | for (f = s->ht[h1]; f; f = f->next) { | |
575 | if (arg->count < arg->skip) { | |
576 | arg->count++; | |
577 | continue; | |
578 | } | |
579 | if (arg->fn(tp, (unsigned long)f, arg) < 0) { | |
580 | arg->stop = 1; | |
581 | return; | |
582 | } | |
583 | arg->count++; | |
584 | } | |
585 | } | |
586 | } | |
587 | } | |
588 | } | |
589 | ||
590 | static int rsvp_dump(struct tcf_proto *tp, unsigned long fh, | |
591 | struct sk_buff *skb, struct tcmsg *t) | |
592 | { | |
593 | struct rsvp_filter *f = (struct rsvp_filter*)fh; | |
594 | struct rsvp_session *s; | |
27a884dc | 595 | unsigned char *b = skb_tail_pointer(skb); |
4b3550ef | 596 | struct nlattr *nest; |
1da177e4 LT |
597 | struct tc_rsvp_pinfo pinfo; |
598 | ||
599 | if (f == NULL) | |
600 | return skb->len; | |
601 | s = f->sess; | |
602 | ||
603 | t->tcm_handle = f->handle; | |
604 | ||
4b3550ef PM |
605 | nest = nla_nest_start(skb, TCA_OPTIONS); |
606 | if (nest == NULL) | |
607 | goto nla_put_failure; | |
1da177e4 | 608 | |
add93b61 | 609 | NLA_PUT(skb, TCA_RSVP_DST, sizeof(s->dst), &s->dst); |
1da177e4 LT |
610 | pinfo.dpi = s->dpi; |
611 | pinfo.spi = f->spi; | |
612 | pinfo.protocol = s->protocol; | |
613 | pinfo.tunnelid = s->tunnelid; | |
614 | pinfo.tunnelhdr = f->tunnelhdr; | |
8a47077a | 615 | pinfo.pad = 0; |
add93b61 | 616 | NLA_PUT(skb, TCA_RSVP_PINFO, sizeof(pinfo), &pinfo); |
1da177e4 | 617 | if (f->res.classid) |
24beeab5 | 618 | NLA_PUT_U32(skb, TCA_RSVP_CLASSID, f->res.classid); |
1da177e4 | 619 | if (((f->handle>>8)&0xFF) != 16) |
add93b61 | 620 | NLA_PUT(skb, TCA_RSVP_SRC, sizeof(f->src), f->src); |
1da177e4 LT |
621 | |
622 | if (tcf_exts_dump(skb, &f->exts, &rsvp_ext_map) < 0) | |
add93b61 | 623 | goto nla_put_failure; |
1da177e4 | 624 | |
4b3550ef | 625 | nla_nest_end(skb, nest); |
1da177e4 LT |
626 | |
627 | if (tcf_exts_dump_stats(skb, &f->exts, &rsvp_ext_map) < 0) | |
add93b61 | 628 | goto nla_put_failure; |
1da177e4 LT |
629 | return skb->len; |
630 | ||
add93b61 | 631 | nla_put_failure: |
dc5fc579 | 632 | nlmsg_trim(skb, b); |
1da177e4 LT |
633 | return -1; |
634 | } | |
635 | ||
636 | static struct tcf_proto_ops RSVP_OPS = { | |
637 | .next = NULL, | |
638 | .kind = RSVP_ID, | |
639 | .classify = rsvp_classify, | |
640 | .init = rsvp_init, | |
641 | .destroy = rsvp_destroy, | |
642 | .get = rsvp_get, | |
643 | .put = rsvp_put, | |
644 | .change = rsvp_change, | |
645 | .delete = rsvp_delete, | |
646 | .walk = rsvp_walk, | |
647 | .dump = rsvp_dump, | |
648 | .owner = THIS_MODULE, | |
649 | }; | |
650 | ||
651 | static int __init init_rsvp(void) | |
652 | { | |
653 | return register_tcf_proto_ops(&RSVP_OPS); | |
654 | } | |
655 | ||
10297b99 | 656 | static void __exit exit_rsvp(void) |
1da177e4 LT |
657 | { |
658 | unregister_tcf_proto_ops(&RSVP_OPS); | |
659 | } | |
660 | ||
661 | module_init(init_rsvp) | |
662 | module_exit(exit_rsvp) |