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 | 68 | |
cc7ec456 | 69 | struct rsvp_head { |
1da177e4 LT |
70 | u32 tmap[256/32]; |
71 | u32 hgenerator; | |
72 | u8 tgenerator; | |
73 | struct rsvp_session *ht[256]; | |
74 | }; | |
75 | ||
cc7ec456 | 76 | struct rsvp_session { |
1da177e4 | 77 | struct rsvp_session *next; |
66c6f529 | 78 | __be32 dst[RSVP_DST_LEN]; |
1da177e4 LT |
79 | struct tc_rsvp_gpi dpi; |
80 | u8 protocol; | |
81 | u8 tunnelid; | |
82 | /* 16 (src,sport) hash slots, and one wildcard source slot */ | |
cc7ec456 | 83 | struct rsvp_filter *ht[16 + 1]; |
1da177e4 LT |
84 | }; |
85 | ||
86 | ||
cc7ec456 | 87 | struct rsvp_filter { |
1da177e4 | 88 | struct rsvp_filter *next; |
66c6f529 | 89 | __be32 src[RSVP_DST_LEN]; |
1da177e4 LT |
90 | struct tc_rsvp_gpi spi; |
91 | u8 tunnelhdr; | |
92 | ||
93 | struct tcf_result res; | |
94 | struct tcf_exts exts; | |
95 | ||
96 | u32 handle; | |
97 | struct rsvp_session *sess; | |
98 | }; | |
99 | ||
cc7ec456 | 100 | static inline unsigned int hash_dst(__be32 *dst, u8 protocol, u8 tunnelid) |
1da177e4 | 101 | { |
cc7ec456 ED |
102 | unsigned int h = (__force __u32)dst[RSVP_DST_LEN - 1]; |
103 | ||
1da177e4 LT |
104 | h ^= h>>16; |
105 | h ^= h>>8; | |
106 | return (h ^ protocol ^ tunnelid) & 0xFF; | |
107 | } | |
108 | ||
cc7ec456 | 109 | static inline unsigned int hash_src(__be32 *src) |
1da177e4 | 110 | { |
cc7ec456 ED |
111 | unsigned int h = (__force __u32)src[RSVP_DST_LEN-1]; |
112 | ||
1da177e4 LT |
113 | h ^= h>>16; |
114 | h ^= h>>8; | |
115 | h ^= h>>4; | |
116 | return h & 0xF; | |
117 | } | |
118 | ||
1da177e4 LT |
119 | #define RSVP_APPLY_RESULT() \ |
120 | { \ | |
121 | int r = tcf_exts_exec(skb, &f->exts, res); \ | |
122 | if (r < 0) \ | |
123 | continue; \ | |
124 | else if (r > 0) \ | |
125 | return r; \ | |
126 | } | |
10297b99 | 127 | |
dc7f9f6e | 128 | static int rsvp_classify(struct sk_buff *skb, const struct tcf_proto *tp, |
1da177e4 LT |
129 | struct tcf_result *res) |
130 | { | |
cc7ec456 | 131 | struct rsvp_session **sht = ((struct rsvp_head *)tp->root)->ht; |
1da177e4 LT |
132 | struct rsvp_session *s; |
133 | struct rsvp_filter *f; | |
cc7ec456 | 134 | unsigned int h1, h2; |
66c6f529 | 135 | __be32 *dst, *src; |
1da177e4 LT |
136 | u8 protocol; |
137 | u8 tunnelid = 0; | |
138 | u8 *xprt; | |
139 | #if RSVP_DST_LEN == 4 | |
12dc96d1 CG |
140 | struct ipv6hdr *nhptr; |
141 | ||
142 | if (!pskb_network_may_pull(skb, sizeof(*nhptr))) | |
143 | return -1; | |
144 | nhptr = ipv6_hdr(skb); | |
1da177e4 | 145 | #else |
12dc96d1 CG |
146 | struct iphdr *nhptr; |
147 | ||
148 | if (!pskb_network_may_pull(skb, sizeof(*nhptr))) | |
149 | return -1; | |
150 | nhptr = ip_hdr(skb); | |
1da177e4 LT |
151 | #endif |
152 | ||
153 | restart: | |
154 | ||
155 | #if RSVP_DST_LEN == 4 | |
156 | src = &nhptr->saddr.s6_addr32[0]; | |
157 | dst = &nhptr->daddr.s6_addr32[0]; | |
158 | protocol = nhptr->nexthdr; | |
cc7ec456 | 159 | xprt = ((u8 *)nhptr) + sizeof(struct ipv6hdr); |
1da177e4 LT |
160 | #else |
161 | src = &nhptr->saddr; | |
162 | dst = &nhptr->daddr; | |
163 | protocol = nhptr->protocol; | |
cc7ec456 | 164 | xprt = ((u8 *)nhptr) + (nhptr->ihl<<2); |
56f8a75c | 165 | if (ip_is_fragment(nhptr)) |
1da177e4 LT |
166 | return -1; |
167 | #endif | |
168 | ||
169 | h1 = hash_dst(dst, protocol, tunnelid); | |
170 | h2 = hash_src(src); | |
171 | ||
172 | for (s = sht[h1]; s; s = s->next) { | |
cc7ec456 | 173 | if (dst[RSVP_DST_LEN-1] == s->dst[RSVP_DST_LEN - 1] && |
1da177e4 | 174 | protocol == s->protocol && |
f64f9e71 | 175 | !(s->dpi.mask & |
cc7ec456 | 176 | (*(u32 *)(xprt + s->dpi.offset) ^ s->dpi.key)) && |
1da177e4 | 177 | #if RSVP_DST_LEN == 4 |
f64f9e71 JP |
178 | dst[0] == s->dst[0] && |
179 | dst[1] == s->dst[1] && | |
180 | dst[2] == s->dst[2] && | |
1da177e4 | 181 | #endif |
f64f9e71 | 182 | tunnelid == s->tunnelid) { |
1da177e4 LT |
183 | |
184 | for (f = s->ht[h2]; f; f = f->next) { | |
cc7ec456 ED |
185 | if (src[RSVP_DST_LEN-1] == f->src[RSVP_DST_LEN - 1] && |
186 | !(f->spi.mask & (*(u32 *)(xprt + f->spi.offset) ^ f->spi.key)) | |
1da177e4 | 187 | #if RSVP_DST_LEN == 4 |
f64f9e71 JP |
188 | && |
189 | src[0] == f->src[0] && | |
190 | src[1] == f->src[1] && | |
191 | src[2] == f->src[2] | |
1da177e4 LT |
192 | #endif |
193 | ) { | |
194 | *res = f->res; | |
195 | RSVP_APPLY_RESULT(); | |
196 | ||
197 | matched: | |
198 | if (f->tunnelhdr == 0) | |
199 | return 0; | |
200 | ||
201 | tunnelid = f->res.classid; | |
cc7ec456 | 202 | nhptr = (void *)(xprt + f->tunnelhdr - sizeof(*nhptr)); |
1da177e4 LT |
203 | goto restart; |
204 | } | |
205 | } | |
206 | ||
207 | /* And wildcard bucket... */ | |
208 | for (f = s->ht[16]; f; f = f->next) { | |
209 | *res = f->res; | |
210 | RSVP_APPLY_RESULT(); | |
211 | goto matched; | |
212 | } | |
213 | return -1; | |
214 | } | |
215 | } | |
216 | return -1; | |
217 | } | |
218 | ||
219 | static unsigned long rsvp_get(struct tcf_proto *tp, u32 handle) | |
220 | { | |
cc7ec456 | 221 | struct rsvp_session **sht = ((struct rsvp_head *)tp->root)->ht; |
1da177e4 LT |
222 | struct rsvp_session *s; |
223 | struct rsvp_filter *f; | |
cc7ec456 ED |
224 | unsigned int h1 = handle & 0xFF; |
225 | unsigned int h2 = (handle >> 8) & 0xFF; | |
1da177e4 LT |
226 | |
227 | if (h2 > 16) | |
228 | return 0; | |
229 | ||
230 | for (s = sht[h1]; s; s = s->next) { | |
231 | for (f = s->ht[h2]; f; f = f->next) { | |
232 | if (f->handle == handle) | |
233 | return (unsigned long)f; | |
234 | } | |
235 | } | |
236 | return 0; | |
237 | } | |
238 | ||
239 | static void rsvp_put(struct tcf_proto *tp, unsigned long f) | |
240 | { | |
241 | } | |
242 | ||
243 | static int rsvp_init(struct tcf_proto *tp) | |
244 | { | |
245 | struct rsvp_head *data; | |
246 | ||
0da974f4 | 247 | data = kzalloc(sizeof(struct rsvp_head), GFP_KERNEL); |
1da177e4 | 248 | if (data) { |
1da177e4 LT |
249 | tp->root = data; |
250 | return 0; | |
251 | } | |
252 | return -ENOBUFS; | |
253 | } | |
254 | ||
cc7ec456 | 255 | static void |
1da177e4 LT |
256 | rsvp_delete_filter(struct tcf_proto *tp, struct rsvp_filter *f) |
257 | { | |
258 | tcf_unbind_filter(tp, &f->res); | |
259 | tcf_exts_destroy(tp, &f->exts); | |
260 | kfree(f); | |
261 | } | |
262 | ||
263 | static void rsvp_destroy(struct tcf_proto *tp) | |
264 | { | |
265 | struct rsvp_head *data = xchg(&tp->root, NULL); | |
266 | struct rsvp_session **sht; | |
267 | int h1, h2; | |
268 | ||
269 | if (data == NULL) | |
270 | return; | |
271 | ||
272 | sht = data->ht; | |
273 | ||
cc7ec456 | 274 | for (h1 = 0; h1 < 256; h1++) { |
1da177e4 LT |
275 | struct rsvp_session *s; |
276 | ||
277 | while ((s = sht[h1]) != NULL) { | |
278 | sht[h1] = s->next; | |
279 | ||
cc7ec456 | 280 | for (h2 = 0; h2 <= 16; h2++) { |
1da177e4 LT |
281 | struct rsvp_filter *f; |
282 | ||
283 | while ((f = s->ht[h2]) != NULL) { | |
284 | s->ht[h2] = f->next; | |
285 | rsvp_delete_filter(tp, f); | |
286 | } | |
287 | } | |
288 | kfree(s); | |
289 | } | |
290 | } | |
291 | kfree(data); | |
292 | } | |
293 | ||
294 | static int rsvp_delete(struct tcf_proto *tp, unsigned long arg) | |
295 | { | |
cc7ec456 ED |
296 | struct rsvp_filter **fp, *f = (struct rsvp_filter *)arg; |
297 | unsigned int h = f->handle; | |
1da177e4 LT |
298 | struct rsvp_session **sp; |
299 | struct rsvp_session *s = f->sess; | |
300 | int i; | |
301 | ||
cc7ec456 | 302 | for (fp = &s->ht[(h >> 8) & 0xFF]; *fp; fp = &(*fp)->next) { |
1da177e4 LT |
303 | if (*fp == f) { |
304 | tcf_tree_lock(tp); | |
305 | *fp = f->next; | |
306 | tcf_tree_unlock(tp); | |
307 | rsvp_delete_filter(tp, f); | |
308 | ||
309 | /* Strip tree */ | |
310 | ||
cc7ec456 | 311 | for (i = 0; i <= 16; i++) |
1da177e4 LT |
312 | if (s->ht[i]) |
313 | return 0; | |
314 | ||
315 | /* OK, session has no flows */ | |
cc7ec456 | 316 | for (sp = &((struct rsvp_head *)tp->root)->ht[h & 0xFF]; |
1da177e4 LT |
317 | *sp; sp = &(*sp)->next) { |
318 | if (*sp == s) { | |
319 | tcf_tree_lock(tp); | |
320 | *sp = s->next; | |
321 | tcf_tree_unlock(tp); | |
322 | ||
323 | kfree(s); | |
324 | return 0; | |
325 | } | |
326 | } | |
327 | ||
328 | return 0; | |
329 | } | |
330 | } | |
331 | return 0; | |
332 | } | |
333 | ||
cc7ec456 | 334 | static unsigned int gen_handle(struct tcf_proto *tp, unsigned salt) |
1da177e4 LT |
335 | { |
336 | struct rsvp_head *data = tp->root; | |
337 | int i = 0xFFFF; | |
338 | ||
339 | while (i-- > 0) { | |
340 | u32 h; | |
cc7ec456 | 341 | |
1da177e4 LT |
342 | if ((data->hgenerator += 0x10000) == 0) |
343 | data->hgenerator = 0x10000; | |
344 | h = data->hgenerator|salt; | |
345 | if (rsvp_get(tp, h) == 0) | |
346 | return h; | |
347 | } | |
348 | return 0; | |
349 | } | |
350 | ||
351 | static int tunnel_bts(struct rsvp_head *data) | |
352 | { | |
cc7ec456 ED |
353 | int n = data->tgenerator >> 5; |
354 | u32 b = 1 << (data->tgenerator & 0x1F); | |
10297b99 | 355 | |
cc7ec456 | 356 | if (data->tmap[n] & b) |
1da177e4 LT |
357 | return 0; |
358 | data->tmap[n] |= b; | |
359 | return 1; | |
360 | } | |
361 | ||
362 | static void tunnel_recycle(struct rsvp_head *data) | |
363 | { | |
364 | struct rsvp_session **sht = data->ht; | |
365 | u32 tmap[256/32]; | |
366 | int h1, h2; | |
367 | ||
368 | memset(tmap, 0, sizeof(tmap)); | |
369 | ||
cc7ec456 | 370 | for (h1 = 0; h1 < 256; h1++) { |
1da177e4 LT |
371 | struct rsvp_session *s; |
372 | for (s = sht[h1]; s; s = s->next) { | |
cc7ec456 | 373 | for (h2 = 0; h2 <= 16; h2++) { |
1da177e4 LT |
374 | struct rsvp_filter *f; |
375 | ||
376 | for (f = s->ht[h2]; f; f = f->next) { | |
377 | if (f->tunnelhdr == 0) | |
378 | continue; | |
379 | data->tgenerator = f->res.classid; | |
380 | tunnel_bts(data); | |
381 | } | |
382 | } | |
383 | } | |
384 | } | |
385 | ||
386 | memcpy(data->tmap, tmap, sizeof(tmap)); | |
387 | } | |
388 | ||
389 | static u32 gen_tunnel(struct rsvp_head *data) | |
390 | { | |
391 | int i, k; | |
392 | ||
cc7ec456 ED |
393 | for (k = 0; k < 2; k++) { |
394 | for (i = 255; i > 0; i--) { | |
1da177e4 LT |
395 | if (++data->tgenerator == 0) |
396 | data->tgenerator = 1; | |
397 | if (tunnel_bts(data)) | |
398 | return data->tgenerator; | |
399 | } | |
400 | tunnel_recycle(data); | |
401 | } | |
402 | return 0; | |
403 | } | |
404 | ||
6fa8c014 PM |
405 | static const struct nla_policy rsvp_policy[TCA_RSVP_MAX + 1] = { |
406 | [TCA_RSVP_CLASSID] = { .type = NLA_U32 }, | |
407 | [TCA_RSVP_DST] = { .type = NLA_BINARY, | |
408 | .len = RSVP_DST_LEN * sizeof(u32) }, | |
409 | [TCA_RSVP_SRC] = { .type = NLA_BINARY, | |
410 | .len = RSVP_DST_LEN * sizeof(u32) }, | |
411 | [TCA_RSVP_PINFO] = { .len = sizeof(struct tc_rsvp_pinfo) }, | |
412 | }; | |
413 | ||
c1b52739 | 414 | static int rsvp_change(struct net *net, struct sk_buff *in_skb, |
af4c6641 | 415 | struct tcf_proto *tp, unsigned long base, |
1da177e4 | 416 | u32 handle, |
add93b61 | 417 | struct nlattr **tca, |
2f7ef2f8 | 418 | unsigned long *arg, bool ovr) |
1da177e4 LT |
419 | { |
420 | struct rsvp_head *data = tp->root; | |
421 | struct rsvp_filter *f, **fp; | |
422 | struct rsvp_session *s, **sp; | |
423 | struct tc_rsvp_pinfo *pinfo = NULL; | |
27e95a8c | 424 | struct nlattr *opt = tca[TCA_OPTIONS]; |
add93b61 | 425 | struct nlattr *tb[TCA_RSVP_MAX + 1]; |
1da177e4 | 426 | struct tcf_exts e; |
cc7ec456 | 427 | unsigned int h1, h2; |
66c6f529 | 428 | __be32 *dst; |
1da177e4 LT |
429 | int err; |
430 | ||
431 | if (opt == NULL) | |
432 | return handle ? -EINVAL : 0; | |
433 | ||
6fa8c014 | 434 | err = nla_parse_nested(tb, TCA_RSVP_MAX, opt, rsvp_policy); |
cee63723 PM |
435 | if (err < 0) |
436 | return err; | |
1da177e4 | 437 | |
5da57f42 | 438 | tcf_exts_init(&e, TCA_RSVP_ACT, TCA_RSVP_POLICE); |
2f7ef2f8 | 439 | err = tcf_exts_validate(net, tp, tb, tca[TCA_RATE], &e, ovr); |
1da177e4 LT |
440 | if (err < 0) |
441 | return err; | |
442 | ||
cc7ec456 ED |
443 | f = (struct rsvp_filter *)*arg; |
444 | if (f) { | |
1da177e4 LT |
445 | /* Node exists: adjust only classid */ |
446 | ||
447 | if (f->handle != handle && handle) | |
448 | goto errout2; | |
27e95a8c IM |
449 | if (tb[TCA_RSVP_CLASSID]) { |
450 | f->res.classid = nla_get_u32(tb[TCA_RSVP_CLASSID]); | |
1da177e4 LT |
451 | tcf_bind_filter(tp, &f->res, base); |
452 | } | |
453 | ||
454 | tcf_exts_change(tp, &f->exts, &e); | |
455 | return 0; | |
456 | } | |
457 | ||
458 | /* Now more serious part... */ | |
459 | err = -EINVAL; | |
460 | if (handle) | |
461 | goto errout2; | |
27e95a8c | 462 | if (tb[TCA_RSVP_DST] == NULL) |
1da177e4 LT |
463 | goto errout2; |
464 | ||
465 | err = -ENOBUFS; | |
0da974f4 | 466 | f = kzalloc(sizeof(struct rsvp_filter), GFP_KERNEL); |
1da177e4 LT |
467 | if (f == NULL) |
468 | goto errout2; | |
469 | ||
5da57f42 | 470 | tcf_exts_init(&f->exts, TCA_RSVP_ACT, TCA_RSVP_POLICE); |
1da177e4 | 471 | h2 = 16; |
27e95a8c IM |
472 | if (tb[TCA_RSVP_SRC]) { |
473 | memcpy(f->src, nla_data(tb[TCA_RSVP_SRC]), sizeof(f->src)); | |
1da177e4 LT |
474 | h2 = hash_src(f->src); |
475 | } | |
27e95a8c IM |
476 | if (tb[TCA_RSVP_PINFO]) { |
477 | pinfo = nla_data(tb[TCA_RSVP_PINFO]); | |
1da177e4 LT |
478 | f->spi = pinfo->spi; |
479 | f->tunnelhdr = pinfo->tunnelhdr; | |
480 | } | |
27e95a8c IM |
481 | if (tb[TCA_RSVP_CLASSID]) |
482 | f->res.classid = nla_get_u32(tb[TCA_RSVP_CLASSID]); | |
1da177e4 | 483 | |
27e95a8c | 484 | dst = nla_data(tb[TCA_RSVP_DST]); |
1da177e4 LT |
485 | h1 = hash_dst(dst, pinfo ? pinfo->protocol : 0, pinfo ? pinfo->tunnelid : 0); |
486 | ||
487 | err = -ENOMEM; | |
488 | if ((f->handle = gen_handle(tp, h1 | (h2<<8))) == 0) | |
489 | goto errout; | |
490 | ||
491 | if (f->tunnelhdr) { | |
492 | err = -EINVAL; | |
493 | if (f->res.classid > 255) | |
494 | goto errout; | |
495 | ||
496 | err = -ENOMEM; | |
497 | if (f->res.classid == 0 && | |
498 | (f->res.classid = gen_tunnel(data)) == 0) | |
499 | goto errout; | |
500 | } | |
501 | ||
cc7ec456 | 502 | for (sp = &data->ht[h1]; (s = *sp) != NULL; sp = &s->next) { |
1da177e4 LT |
503 | if (dst[RSVP_DST_LEN-1] == s->dst[RSVP_DST_LEN-1] && |
504 | pinfo && pinfo->protocol == s->protocol && | |
f64f9e71 | 505 | memcmp(&pinfo->dpi, &s->dpi, sizeof(s->dpi)) == 0 && |
1da177e4 | 506 | #if RSVP_DST_LEN == 4 |
f64f9e71 JP |
507 | dst[0] == s->dst[0] && |
508 | dst[1] == s->dst[1] && | |
509 | dst[2] == s->dst[2] && | |
1da177e4 | 510 | #endif |
f64f9e71 | 511 | pinfo->tunnelid == s->tunnelid) { |
1da177e4 LT |
512 | |
513 | insert: | |
514 | /* OK, we found appropriate session */ | |
515 | ||
516 | fp = &s->ht[h2]; | |
517 | ||
518 | f->sess = s; | |
519 | if (f->tunnelhdr == 0) | |
520 | tcf_bind_filter(tp, &f->res, base); | |
521 | ||
522 | tcf_exts_change(tp, &f->exts, &e); | |
523 | ||
524 | for (fp = &s->ht[h2]; *fp; fp = &(*fp)->next) | |
cc7ec456 | 525 | if (((*fp)->spi.mask & f->spi.mask) != f->spi.mask) |
1da177e4 LT |
526 | break; |
527 | f->next = *fp; | |
528 | wmb(); | |
529 | *fp = f; | |
530 | ||
531 | *arg = (unsigned long)f; | |
532 | return 0; | |
533 | } | |
534 | } | |
535 | ||
536 | /* No session found. Create new one. */ | |
537 | ||
538 | err = -ENOBUFS; | |
0da974f4 | 539 | s = kzalloc(sizeof(struct rsvp_session), GFP_KERNEL); |
1da177e4 LT |
540 | if (s == NULL) |
541 | goto errout; | |
1da177e4 LT |
542 | memcpy(s->dst, dst, sizeof(s->dst)); |
543 | ||
544 | if (pinfo) { | |
545 | s->dpi = pinfo->dpi; | |
546 | s->protocol = pinfo->protocol; | |
547 | s->tunnelid = pinfo->tunnelid; | |
548 | } | |
549 | for (sp = &data->ht[h1]; *sp; sp = &(*sp)->next) { | |
550 | if (((*sp)->dpi.mask&s->dpi.mask) != s->dpi.mask) | |
551 | break; | |
552 | } | |
553 | s->next = *sp; | |
554 | wmb(); | |
555 | *sp = s; | |
10297b99 | 556 | |
1da177e4 LT |
557 | goto insert; |
558 | ||
559 | errout: | |
a51482bd | 560 | kfree(f); |
1da177e4 LT |
561 | errout2: |
562 | tcf_exts_destroy(tp, &e); | |
563 | return err; | |
564 | } | |
565 | ||
566 | static void rsvp_walk(struct tcf_proto *tp, struct tcf_walker *arg) | |
567 | { | |
568 | struct rsvp_head *head = tp->root; | |
cc7ec456 | 569 | unsigned int h, h1; |
1da177e4 LT |
570 | |
571 | if (arg->stop) | |
572 | return; | |
573 | ||
574 | for (h = 0; h < 256; h++) { | |
575 | struct rsvp_session *s; | |
576 | ||
577 | for (s = head->ht[h]; s; s = s->next) { | |
578 | for (h1 = 0; h1 <= 16; h1++) { | |
579 | struct rsvp_filter *f; | |
580 | ||
581 | for (f = s->ht[h1]; f; f = f->next) { | |
582 | if (arg->count < arg->skip) { | |
583 | arg->count++; | |
584 | continue; | |
585 | } | |
586 | if (arg->fn(tp, (unsigned long)f, arg) < 0) { | |
587 | arg->stop = 1; | |
588 | return; | |
589 | } | |
590 | arg->count++; | |
591 | } | |
592 | } | |
593 | } | |
594 | } | |
595 | } | |
596 | ||
832d1d5b | 597 | static int rsvp_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, |
1da177e4 LT |
598 | struct sk_buff *skb, struct tcmsg *t) |
599 | { | |
cc7ec456 | 600 | struct rsvp_filter *f = (struct rsvp_filter *)fh; |
1da177e4 | 601 | struct rsvp_session *s; |
27a884dc | 602 | unsigned char *b = skb_tail_pointer(skb); |
4b3550ef | 603 | struct nlattr *nest; |
1da177e4 LT |
604 | struct tc_rsvp_pinfo pinfo; |
605 | ||
606 | if (f == NULL) | |
607 | return skb->len; | |
608 | s = f->sess; | |
609 | ||
610 | t->tcm_handle = f->handle; | |
611 | ||
4b3550ef PM |
612 | nest = nla_nest_start(skb, TCA_OPTIONS); |
613 | if (nest == NULL) | |
614 | goto nla_put_failure; | |
1da177e4 | 615 | |
1b34ec43 DM |
616 | if (nla_put(skb, TCA_RSVP_DST, sizeof(s->dst), &s->dst)) |
617 | goto nla_put_failure; | |
1da177e4 LT |
618 | pinfo.dpi = s->dpi; |
619 | pinfo.spi = f->spi; | |
620 | pinfo.protocol = s->protocol; | |
621 | pinfo.tunnelid = s->tunnelid; | |
622 | pinfo.tunnelhdr = f->tunnelhdr; | |
8a47077a | 623 | pinfo.pad = 0; |
1b34ec43 DM |
624 | if (nla_put(skb, TCA_RSVP_PINFO, sizeof(pinfo), &pinfo)) |
625 | goto nla_put_failure; | |
626 | if (f->res.classid && | |
627 | nla_put_u32(skb, TCA_RSVP_CLASSID, f->res.classid)) | |
628 | goto nla_put_failure; | |
629 | if (((f->handle >> 8) & 0xFF) != 16 && | |
630 | nla_put(skb, TCA_RSVP_SRC, sizeof(f->src), f->src)) | |
631 | goto nla_put_failure; | |
1da177e4 | 632 | |
5da57f42 | 633 | if (tcf_exts_dump(skb, &f->exts) < 0) |
add93b61 | 634 | goto nla_put_failure; |
1da177e4 | 635 | |
4b3550ef | 636 | nla_nest_end(skb, nest); |
1da177e4 | 637 | |
5da57f42 | 638 | if (tcf_exts_dump_stats(skb, &f->exts) < 0) |
add93b61 | 639 | goto nla_put_failure; |
1da177e4 LT |
640 | return skb->len; |
641 | ||
add93b61 | 642 | nla_put_failure: |
dc5fc579 | 643 | nlmsg_trim(skb, b); |
1da177e4 LT |
644 | return -1; |
645 | } | |
646 | ||
27e95a8c | 647 | static struct tcf_proto_ops RSVP_OPS __read_mostly = { |
1da177e4 LT |
648 | .kind = RSVP_ID, |
649 | .classify = rsvp_classify, | |
650 | .init = rsvp_init, | |
651 | .destroy = rsvp_destroy, | |
652 | .get = rsvp_get, | |
653 | .put = rsvp_put, | |
654 | .change = rsvp_change, | |
655 | .delete = rsvp_delete, | |
656 | .walk = rsvp_walk, | |
657 | .dump = rsvp_dump, | |
658 | .owner = THIS_MODULE, | |
659 | }; | |
660 | ||
661 | static int __init init_rsvp(void) | |
662 | { | |
663 | return register_tcf_proto_ops(&RSVP_OPS); | |
664 | } | |
665 | ||
10297b99 | 666 | static void __exit exit_rsvp(void) |
1da177e4 LT |
667 | { |
668 | unregister_tcf_proto_ops(&RSVP_OPS); | |
669 | } | |
670 | ||
671 | module_init(init_rsvp) | |
672 | module_exit(exit_rsvp) |