Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * net/sched/cls_u32.c Ugly (or Universal) 32bit key Packet 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 | * The filters are packed to hash tables of key nodes | |
12 | * with a set of 32bit key/mask pairs at every node. | |
13 | * Nodes reference next level hash tables etc. | |
14 | * | |
15 | * This scheme is the best universal classifier I managed to | |
16 | * invent; it is not super-fast, but it is not slow (provided you | |
17 | * program it correctly), and general enough. And its relative | |
18 | * speed grows as the number of rules becomes larger. | |
19 | * | |
20 | * It seems that it represents the best middle point between | |
21 | * speed and manageability both by human and by machine. | |
22 | * | |
23 | * It is especially useful for link sharing combined with QoS; | |
24 | * pure RSVP doesn't need such a general approach and can use | |
25 | * much simpler (and faster) schemes, sort of cls_rsvp.c. | |
26 | * | |
27 | * JHS: We should remove the CONFIG_NET_CLS_IND from here | |
28 | * eventually when the meta match extension is made available | |
29 | * | |
30 | * nfmark match added by Catalin(ux aka Dino) BOIE <catab at umbrella.ro> | |
31 | */ | |
32 | ||
1da177e4 | 33 | #include <linux/module.h> |
5a0e3ad6 | 34 | #include <linux/slab.h> |
1da177e4 LT |
35 | #include <linux/types.h> |
36 | #include <linux/kernel.h> | |
1da177e4 | 37 | #include <linux/string.h> |
1da177e4 | 38 | #include <linux/errno.h> |
1ce87720 | 39 | #include <linux/percpu.h> |
1da177e4 | 40 | #include <linux/rtnetlink.h> |
1da177e4 | 41 | #include <linux/skbuff.h> |
7801db8a | 42 | #include <linux/bitmap.h> |
0ba48053 | 43 | #include <net/netlink.h> |
1da177e4 LT |
44 | #include <net/act_api.h> |
45 | #include <net/pkt_cls.h> | |
46 | ||
cc7ec456 | 47 | struct tc_u_knode { |
1ce87720 | 48 | struct tc_u_knode __rcu *next; |
1da177e4 | 49 | u32 handle; |
1ce87720 | 50 | struct tc_u_hnode __rcu *ht_up; |
1da177e4 LT |
51 | struct tcf_exts exts; |
52 | #ifdef CONFIG_NET_CLS_IND | |
2519a602 | 53 | int ifindex; |
1da177e4 LT |
54 | #endif |
55 | u8 fshift; | |
56 | struct tcf_result res; | |
1ce87720 | 57 | struct tc_u_hnode __rcu *ht_down; |
1da177e4 | 58 | #ifdef CONFIG_CLS_U32_PERF |
459d5f62 | 59 | struct tc_u32_pcnt __percpu *pf; |
1da177e4 LT |
60 | #endif |
61 | #ifdef CONFIG_CLS_U32_MARK | |
459d5f62 JF |
62 | u32 val; |
63 | u32 mask; | |
64 | u32 __percpu *pcpu_success; | |
1da177e4 | 65 | #endif |
1ce87720 | 66 | struct tcf_proto *tp; |
1ce87720 | 67 | struct rcu_head rcu; |
4e2840ee JF |
68 | /* The 'sel' field MUST be the last field in structure to allow for |
69 | * tc_u32_keys allocated at end of structure. | |
70 | */ | |
71 | struct tc_u32_sel sel; | |
1da177e4 LT |
72 | }; |
73 | ||
cc7ec456 | 74 | struct tc_u_hnode { |
1ce87720 | 75 | struct tc_u_hnode __rcu *next; |
1da177e4 LT |
76 | u32 handle; |
77 | u32 prio; | |
78 | struct tc_u_common *tp_c; | |
79 | int refcnt; | |
cc7ec456 | 80 | unsigned int divisor; |
1ce87720 | 81 | struct rcu_head rcu; |
5778d39d WC |
82 | /* The 'ht' field MUST be the last field in structure to allow for |
83 | * more entries allocated at end of structure. | |
84 | */ | |
85 | struct tc_u_knode __rcu *ht[1]; | |
1da177e4 LT |
86 | }; |
87 | ||
cc7ec456 | 88 | struct tc_u_common { |
1ce87720 | 89 | struct tc_u_hnode __rcu *hlist; |
1da177e4 LT |
90 | struct Qdisc *q; |
91 | int refcnt; | |
92 | u32 hgenerator; | |
1ce87720 | 93 | struct rcu_head rcu; |
1da177e4 LT |
94 | }; |
95 | ||
cc7ec456 ED |
96 | static inline unsigned int u32_hash_fold(__be32 key, |
97 | const struct tc_u32_sel *sel, | |
98 | u8 fshift) | |
1da177e4 | 99 | { |
cc7ec456 | 100 | unsigned int h = ntohl(key & sel->hmask) >> fshift; |
1da177e4 LT |
101 | |
102 | return h; | |
103 | } | |
104 | ||
dc7f9f6e | 105 | static int u32_classify(struct sk_buff *skb, const struct tcf_proto *tp, struct tcf_result *res) |
1da177e4 LT |
106 | { |
107 | struct { | |
108 | struct tc_u_knode *knode; | |
fbc2e7d9 | 109 | unsigned int off; |
1da177e4 LT |
110 | } stack[TC_U32_MAXDEPTH]; |
111 | ||
1ce87720 | 112 | struct tc_u_hnode *ht = rcu_dereference_bh(tp->root); |
fbc2e7d9 | 113 | unsigned int off = skb_network_offset(skb); |
1da177e4 LT |
114 | struct tc_u_knode *n; |
115 | int sdepth = 0; | |
116 | int off2 = 0; | |
117 | int sel = 0; | |
118 | #ifdef CONFIG_CLS_U32_PERF | |
119 | int j; | |
120 | #endif | |
121 | int i, r; | |
122 | ||
123 | next_ht: | |
1ce87720 | 124 | n = rcu_dereference_bh(ht->ht[sel]); |
1da177e4 LT |
125 | |
126 | next_knode: | |
127 | if (n) { | |
128 | struct tc_u32_key *key = n->sel.keys; | |
129 | ||
130 | #ifdef CONFIG_CLS_U32_PERF | |
459d5f62 | 131 | __this_cpu_inc(n->pf->rcnt); |
1da177e4 LT |
132 | j = 0; |
133 | #endif | |
134 | ||
135 | #ifdef CONFIG_CLS_U32_MARK | |
459d5f62 | 136 | if ((skb->mark & n->mask) != n->val) { |
1ce87720 | 137 | n = rcu_dereference_bh(n->next); |
1da177e4 LT |
138 | goto next_knode; |
139 | } else { | |
459d5f62 | 140 | __this_cpu_inc(*n->pcpu_success); |
1da177e4 LT |
141 | } |
142 | #endif | |
143 | ||
cc7ec456 | 144 | for (i = n->sel.nkeys; i > 0; i--, key++) { |
66d50d25 | 145 | int toff = off + key->off + (off2 & key->offmask); |
86fce3ba | 146 | __be32 *data, hdata; |
fbc2e7d9 | 147 | |
4e18b3ed | 148 | if (skb_headroom(skb) + toff > INT_MAX) |
66d50d25 | 149 | goto out; |
150 | ||
86fce3ba | 151 | data = skb_header_pointer(skb, toff, 4, &hdata); |
fbc2e7d9 CG |
152 | if (!data) |
153 | goto out; | |
154 | if ((*data ^ key->val) & key->mask) { | |
1ce87720 | 155 | n = rcu_dereference_bh(n->next); |
1da177e4 LT |
156 | goto next_knode; |
157 | } | |
158 | #ifdef CONFIG_CLS_U32_PERF | |
459d5f62 | 159 | __this_cpu_inc(n->pf->kcnts[j]); |
1da177e4 LT |
160 | j++; |
161 | #endif | |
162 | } | |
1ce87720 JF |
163 | |
164 | ht = rcu_dereference_bh(n->ht_down); | |
165 | if (!ht) { | |
1da177e4 | 166 | check_terminal: |
cc7ec456 | 167 | if (n->sel.flags & TC_U32_TERMINAL) { |
1da177e4 LT |
168 | |
169 | *res = n->res; | |
170 | #ifdef CONFIG_NET_CLS_IND | |
2519a602 | 171 | if (!tcf_match_indev(skb, n->ifindex)) { |
1ce87720 | 172 | n = rcu_dereference_bh(n->next); |
1da177e4 LT |
173 | goto next_knode; |
174 | } | |
175 | #endif | |
176 | #ifdef CONFIG_CLS_U32_PERF | |
459d5f62 | 177 | __this_cpu_inc(n->pf->rhit); |
1da177e4 LT |
178 | #endif |
179 | r = tcf_exts_exec(skb, &n->exts, res); | |
180 | if (r < 0) { | |
1ce87720 | 181 | n = rcu_dereference_bh(n->next); |
1da177e4 LT |
182 | goto next_knode; |
183 | } | |
184 | ||
185 | return r; | |
186 | } | |
1ce87720 | 187 | n = rcu_dereference_bh(n->next); |
1da177e4 LT |
188 | goto next_knode; |
189 | } | |
190 | ||
191 | /* PUSH */ | |
192 | if (sdepth >= TC_U32_MAXDEPTH) | |
193 | goto deadloop; | |
194 | stack[sdepth].knode = n; | |
fbc2e7d9 | 195 | stack[sdepth].off = off; |
1da177e4 LT |
196 | sdepth++; |
197 | ||
1ce87720 | 198 | ht = rcu_dereference_bh(n->ht_down); |
1da177e4 | 199 | sel = 0; |
fbc2e7d9 | 200 | if (ht->divisor) { |
86fce3ba | 201 | __be32 *data, hdata; |
fbc2e7d9 CG |
202 | |
203 | data = skb_header_pointer(skb, off + n->sel.hoff, 4, | |
86fce3ba | 204 | &hdata); |
fbc2e7d9 CG |
205 | if (!data) |
206 | goto out; | |
207 | sel = ht->divisor & u32_hash_fold(*data, &n->sel, | |
208 | n->fshift); | |
209 | } | |
cc7ec456 | 210 | if (!(n->sel.flags & (TC_U32_VAROFFSET | TC_U32_OFFSET | TC_U32_EAT))) |
1da177e4 LT |
211 | goto next_ht; |
212 | ||
cc7ec456 | 213 | if (n->sel.flags & (TC_U32_OFFSET | TC_U32_VAROFFSET)) { |
1da177e4 | 214 | off2 = n->sel.off + 3; |
fbc2e7d9 | 215 | if (n->sel.flags & TC_U32_VAROFFSET) { |
86fce3ba | 216 | __be16 *data, hdata; |
fbc2e7d9 CG |
217 | |
218 | data = skb_header_pointer(skb, | |
219 | off + n->sel.offoff, | |
86fce3ba | 220 | 2, &hdata); |
fbc2e7d9 CG |
221 | if (!data) |
222 | goto out; | |
223 | off2 += ntohs(n->sel.offmask & *data) >> | |
224 | n->sel.offshift; | |
225 | } | |
1da177e4 LT |
226 | off2 &= ~3; |
227 | } | |
cc7ec456 | 228 | if (n->sel.flags & TC_U32_EAT) { |
fbc2e7d9 | 229 | off += off2; |
1da177e4 LT |
230 | off2 = 0; |
231 | } | |
232 | ||
fbc2e7d9 | 233 | if (off < skb->len) |
1da177e4 LT |
234 | goto next_ht; |
235 | } | |
236 | ||
237 | /* POP */ | |
238 | if (sdepth--) { | |
239 | n = stack[sdepth].knode; | |
1ce87720 | 240 | ht = rcu_dereference_bh(n->ht_up); |
fbc2e7d9 | 241 | off = stack[sdepth].off; |
1da177e4 LT |
242 | goto check_terminal; |
243 | } | |
fbc2e7d9 | 244 | out: |
1da177e4 LT |
245 | return -1; |
246 | ||
247 | deadloop: | |
e87cc472 | 248 | net_warn_ratelimited("cls_u32: dead loop\n"); |
1da177e4 LT |
249 | return -1; |
250 | } | |
251 | ||
cc7ec456 | 252 | static struct tc_u_hnode * |
1da177e4 LT |
253 | u32_lookup_ht(struct tc_u_common *tp_c, u32 handle) |
254 | { | |
255 | struct tc_u_hnode *ht; | |
256 | ||
1ce87720 JF |
257 | for (ht = rtnl_dereference(tp_c->hlist); |
258 | ht; | |
259 | ht = rtnl_dereference(ht->next)) | |
1da177e4 LT |
260 | if (ht->handle == handle) |
261 | break; | |
262 | ||
263 | return ht; | |
264 | } | |
265 | ||
cc7ec456 | 266 | static struct tc_u_knode * |
1da177e4 LT |
267 | u32_lookup_key(struct tc_u_hnode *ht, u32 handle) |
268 | { | |
cc7ec456 | 269 | unsigned int sel; |
1da177e4 LT |
270 | struct tc_u_knode *n = NULL; |
271 | ||
272 | sel = TC_U32_HASH(handle); | |
273 | if (sel > ht->divisor) | |
274 | goto out; | |
275 | ||
1ce87720 JF |
276 | for (n = rtnl_dereference(ht->ht[sel]); |
277 | n; | |
278 | n = rtnl_dereference(n->next)) | |
1da177e4 LT |
279 | if (n->handle == handle) |
280 | break; | |
281 | out: | |
282 | return n; | |
283 | } | |
284 | ||
285 | ||
286 | static unsigned long u32_get(struct tcf_proto *tp, u32 handle) | |
287 | { | |
288 | struct tc_u_hnode *ht; | |
289 | struct tc_u_common *tp_c = tp->data; | |
290 | ||
291 | if (TC_U32_HTID(handle) == TC_U32_ROOT) | |
1ce87720 | 292 | ht = rtnl_dereference(tp->root); |
1da177e4 LT |
293 | else |
294 | ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle)); | |
295 | ||
296 | if (!ht) | |
297 | return 0; | |
298 | ||
299 | if (TC_U32_KEY(handle) == 0) | |
300 | return (unsigned long)ht; | |
301 | ||
302 | return (unsigned long)u32_lookup_key(ht, handle); | |
303 | } | |
304 | ||
1da177e4 LT |
305 | static u32 gen_new_htid(struct tc_u_common *tp_c) |
306 | { | |
307 | int i = 0x800; | |
308 | ||
1ce87720 JF |
309 | /* hgenerator only used inside rtnl lock it is safe to increment |
310 | * without read _copy_ update semantics | |
311 | */ | |
1da177e4 LT |
312 | do { |
313 | if (++tp_c->hgenerator == 0x7FF) | |
314 | tp_c->hgenerator = 1; | |
cc7ec456 | 315 | } while (--i > 0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20)); |
1da177e4 LT |
316 | |
317 | return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0; | |
318 | } | |
319 | ||
320 | static int u32_init(struct tcf_proto *tp) | |
321 | { | |
322 | struct tc_u_hnode *root_ht; | |
323 | struct tc_u_common *tp_c; | |
324 | ||
72b25a91 | 325 | tp_c = tp->q->u32_node; |
1da177e4 | 326 | |
0da974f4 | 327 | root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL); |
1da177e4 LT |
328 | if (root_ht == NULL) |
329 | return -ENOBUFS; | |
330 | ||
1da177e4 LT |
331 | root_ht->divisor = 0; |
332 | root_ht->refcnt++; | |
333 | root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000; | |
334 | root_ht->prio = tp->prio; | |
335 | ||
336 | if (tp_c == NULL) { | |
0da974f4 | 337 | tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL); |
1da177e4 LT |
338 | if (tp_c == NULL) { |
339 | kfree(root_ht); | |
340 | return -ENOBUFS; | |
341 | } | |
1da177e4 | 342 | tp_c->q = tp->q; |
72b25a91 | 343 | tp->q->u32_node = tp_c; |
1da177e4 LT |
344 | } |
345 | ||
346 | tp_c->refcnt++; | |
1ce87720 JF |
347 | RCU_INIT_POINTER(root_ht->next, tp_c->hlist); |
348 | rcu_assign_pointer(tp_c->hlist, root_ht); | |
1da177e4 LT |
349 | root_ht->tp_c = tp_c; |
350 | ||
1ce87720 | 351 | rcu_assign_pointer(tp->root, root_ht); |
1da177e4 LT |
352 | tp->data = tp_c; |
353 | return 0; | |
354 | } | |
355 | ||
de5df632 JF |
356 | static int u32_destroy_key(struct tcf_proto *tp, |
357 | struct tc_u_knode *n, | |
358 | bool free_pf) | |
1da177e4 | 359 | { |
18d0264f | 360 | tcf_exts_destroy(&n->exts); |
1da177e4 LT |
361 | if (n->ht_down) |
362 | n->ht_down->refcnt--; | |
363 | #ifdef CONFIG_CLS_U32_PERF | |
de5df632 JF |
364 | if (free_pf) |
365 | free_percpu(n->pf); | |
a1ddcfee JF |
366 | #endif |
367 | #ifdef CONFIG_CLS_U32_MARK | |
de5df632 JF |
368 | if (free_pf) |
369 | free_percpu(n->pcpu_success); | |
1da177e4 LT |
370 | #endif |
371 | kfree(n); | |
372 | return 0; | |
373 | } | |
374 | ||
de5df632 JF |
375 | /* u32_delete_key_rcu should be called when free'ing a copied |
376 | * version of a tc_u_knode obtained from u32_init_knode(). When | |
377 | * copies are obtained from u32_init_knode() the statistics are | |
378 | * shared between the old and new copies to allow readers to | |
379 | * continue to update the statistics during the copy. To support | |
380 | * this the u32_delete_key_rcu variant does not free the percpu | |
381 | * statistics. | |
382 | */ | |
1ce87720 JF |
383 | static void u32_delete_key_rcu(struct rcu_head *rcu) |
384 | { | |
385 | struct tc_u_knode *key = container_of(rcu, struct tc_u_knode, rcu); | |
386 | ||
de5df632 JF |
387 | u32_destroy_key(key->tp, key, false); |
388 | } | |
389 | ||
390 | /* u32_delete_key_freepf_rcu is the rcu callback variant | |
391 | * that free's the entire structure including the statistics | |
392 | * percpu variables. Only use this if the key is not a copy | |
393 | * returned by u32_init_knode(). See u32_delete_key_rcu() | |
394 | * for the variant that should be used with keys return from | |
395 | * u32_init_knode() | |
396 | */ | |
397 | static void u32_delete_key_freepf_rcu(struct rcu_head *rcu) | |
398 | { | |
399 | struct tc_u_knode *key = container_of(rcu, struct tc_u_knode, rcu); | |
400 | ||
401 | u32_destroy_key(key->tp, key, true); | |
1ce87720 JF |
402 | } |
403 | ||
82d567c2 | 404 | static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode *key) |
1da177e4 | 405 | { |
1ce87720 JF |
406 | struct tc_u_knode __rcu **kp; |
407 | struct tc_u_knode *pkp; | |
a96366bf | 408 | struct tc_u_hnode *ht = rtnl_dereference(key->ht_up); |
1da177e4 LT |
409 | |
410 | if (ht) { | |
1ce87720 JF |
411 | kp = &ht->ht[TC_U32_HASH(key->handle)]; |
412 | for (pkp = rtnl_dereference(*kp); pkp; | |
413 | kp = &pkp->next, pkp = rtnl_dereference(*kp)) { | |
414 | if (pkp == key) { | |
415 | RCU_INIT_POINTER(*kp, key->next); | |
1da177e4 | 416 | |
a0efb80c | 417 | tcf_unbind_filter(tp, &key->res); |
de5df632 | 418 | call_rcu(&key->rcu, u32_delete_key_freepf_rcu); |
1da177e4 LT |
419 | return 0; |
420 | } | |
421 | } | |
422 | } | |
547b792c | 423 | WARN_ON(1); |
1da177e4 LT |
424 | return 0; |
425 | } | |
426 | ||
a0efb80c | 427 | static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht) |
1da177e4 LT |
428 | { |
429 | struct tc_u_knode *n; | |
cc7ec456 | 430 | unsigned int h; |
1da177e4 | 431 | |
cc7ec456 | 432 | for (h = 0; h <= ht->divisor; h++) { |
1ce87720 JF |
433 | while ((n = rtnl_dereference(ht->ht[h])) != NULL) { |
434 | RCU_INIT_POINTER(ht->ht[h], | |
435 | rtnl_dereference(n->next)); | |
a0efb80c | 436 | tcf_unbind_filter(tp, &n->res); |
de5df632 | 437 | call_rcu(&n->rcu, u32_delete_key_freepf_rcu); |
1da177e4 LT |
438 | } |
439 | } | |
440 | } | |
441 | ||
442 | static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht) | |
443 | { | |
444 | struct tc_u_common *tp_c = tp->data; | |
1ce87720 JF |
445 | struct tc_u_hnode __rcu **hn; |
446 | struct tc_u_hnode *phn; | |
1da177e4 | 447 | |
547b792c | 448 | WARN_ON(ht->refcnt); |
1da177e4 | 449 | |
a0efb80c | 450 | u32_clear_hnode(tp, ht); |
1da177e4 | 451 | |
1ce87720 JF |
452 | hn = &tp_c->hlist; |
453 | for (phn = rtnl_dereference(*hn); | |
454 | phn; | |
455 | hn = &phn->next, phn = rtnl_dereference(*hn)) { | |
456 | if (phn == ht) { | |
457 | RCU_INIT_POINTER(*hn, ht->next); | |
458 | kfree_rcu(ht, rcu); | |
1da177e4 LT |
459 | return 0; |
460 | } | |
461 | } | |
462 | ||
1da177e4 LT |
463 | return -ENOENT; |
464 | } | |
465 | ||
1e052be6 CW |
466 | static bool ht_empty(struct tc_u_hnode *ht) |
467 | { | |
468 | unsigned int h; | |
469 | ||
470 | for (h = 0; h <= ht->divisor; h++) | |
471 | if (rcu_access_pointer(ht->ht[h])) | |
472 | return false; | |
473 | ||
474 | return true; | |
475 | } | |
476 | ||
477 | static bool u32_destroy(struct tcf_proto *tp, bool force) | |
1da177e4 LT |
478 | { |
479 | struct tc_u_common *tp_c = tp->data; | |
1ce87720 | 480 | struct tc_u_hnode *root_ht = rtnl_dereference(tp->root); |
1da177e4 | 481 | |
547b792c | 482 | WARN_ON(root_ht == NULL); |
1da177e4 | 483 | |
1e052be6 CW |
484 | if (!force) { |
485 | if (root_ht) { | |
486 | if (root_ht->refcnt > 1) | |
487 | return false; | |
488 | if (root_ht->refcnt == 1) { | |
489 | if (!ht_empty(root_ht)) | |
490 | return false; | |
491 | } | |
492 | } | |
a6c1aea0 WC |
493 | |
494 | if (tp_c->refcnt > 1) | |
495 | return false; | |
496 | ||
497 | if (tp_c->refcnt == 1) { | |
498 | struct tc_u_hnode *ht; | |
499 | ||
500 | for (ht = rtnl_dereference(tp_c->hlist); | |
501 | ht; | |
502 | ht = rtnl_dereference(ht->next)) | |
503 | if (!ht_empty(ht)) | |
504 | return false; | |
505 | } | |
1e052be6 CW |
506 | } |
507 | ||
1da177e4 LT |
508 | if (root_ht && --root_ht->refcnt == 0) |
509 | u32_destroy_hnode(tp, root_ht); | |
510 | ||
511 | if (--tp_c->refcnt == 0) { | |
512 | struct tc_u_hnode *ht; | |
1da177e4 | 513 | |
72b25a91 | 514 | tp->q->u32_node = NULL; |
1da177e4 | 515 | |
1ce87720 JF |
516 | for (ht = rtnl_dereference(tp_c->hlist); |
517 | ht; | |
518 | ht = rtnl_dereference(ht->next)) { | |
e56cfad1 | 519 | ht->refcnt--; |
a0efb80c | 520 | u32_clear_hnode(tp, ht); |
e56cfad1 | 521 | } |
1da177e4 | 522 | |
1ce87720 JF |
523 | while ((ht = rtnl_dereference(tp_c->hlist)) != NULL) { |
524 | RCU_INIT_POINTER(tp_c->hlist, ht->next); | |
525 | kfree_rcu(ht, rcu); | |
3ff50b79 | 526 | } |
1da177e4 LT |
527 | |
528 | kfree(tp_c); | |
529 | } | |
530 | ||
531 | tp->data = NULL; | |
1e052be6 | 532 | return true; |
1da177e4 LT |
533 | } |
534 | ||
535 | static int u32_delete(struct tcf_proto *tp, unsigned long arg) | |
536 | { | |
cc7ec456 | 537 | struct tc_u_hnode *ht = (struct tc_u_hnode *)arg; |
1ce87720 | 538 | struct tc_u_hnode *root_ht = rtnl_dereference(tp->root); |
1da177e4 LT |
539 | |
540 | if (ht == NULL) | |
541 | return 0; | |
542 | ||
543 | if (TC_U32_KEY(ht->handle)) | |
cc7ec456 | 544 | return u32_delete_key(tp, (struct tc_u_knode *)ht); |
1da177e4 | 545 | |
1ce87720 | 546 | if (root_ht == ht) |
1da177e4 LT |
547 | return -EINVAL; |
548 | ||
e56cfad1 JP |
549 | if (ht->refcnt == 1) { |
550 | ht->refcnt--; | |
1da177e4 | 551 | u32_destroy_hnode(tp, ht); |
e56cfad1 JP |
552 | } else { |
553 | return -EBUSY; | |
554 | } | |
1da177e4 LT |
555 | |
556 | return 0; | |
557 | } | |
558 | ||
7801db8a | 559 | #define NR_U32_NODE (1<<12) |
1da177e4 LT |
560 | static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle) |
561 | { | |
562 | struct tc_u_knode *n; | |
7801db8a CW |
563 | unsigned long i; |
564 | unsigned long *bitmap = kzalloc(BITS_TO_LONGS(NR_U32_NODE) * sizeof(unsigned long), | |
565 | GFP_KERNEL); | |
566 | if (!bitmap) | |
567 | return handle | 0xFFF; | |
1da177e4 | 568 | |
1ce87720 JF |
569 | for (n = rtnl_dereference(ht->ht[TC_U32_HASH(handle)]); |
570 | n; | |
571 | n = rtnl_dereference(n->next)) | |
7801db8a | 572 | set_bit(TC_U32_NODE(n->handle), bitmap); |
1da177e4 | 573 | |
7801db8a CW |
574 | i = find_next_zero_bit(bitmap, NR_U32_NODE, 0x800); |
575 | if (i >= NR_U32_NODE) | |
576 | i = find_next_zero_bit(bitmap, NR_U32_NODE, 1); | |
577 | ||
578 | kfree(bitmap); | |
579 | return handle | (i >= NR_U32_NODE ? 0xFFF : i); | |
1da177e4 LT |
580 | } |
581 | ||
6fa8c014 PM |
582 | static const struct nla_policy u32_policy[TCA_U32_MAX + 1] = { |
583 | [TCA_U32_CLASSID] = { .type = NLA_U32 }, | |
584 | [TCA_U32_HASH] = { .type = NLA_U32 }, | |
585 | [TCA_U32_LINK] = { .type = NLA_U32 }, | |
586 | [TCA_U32_DIVISOR] = { .type = NLA_U32 }, | |
587 | [TCA_U32_SEL] = { .len = sizeof(struct tc_u32_sel) }, | |
588 | [TCA_U32_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ }, | |
589 | [TCA_U32_MARK] = { .len = sizeof(struct tc_u32_mark) }, | |
590 | }; | |
591 | ||
c1b52739 BL |
592 | static int u32_set_parms(struct net *net, struct tcf_proto *tp, |
593 | unsigned long base, struct tc_u_hnode *ht, | |
add93b61 | 594 | struct tc_u_knode *n, struct nlattr **tb, |
2f7ef2f8 | 595 | struct nlattr *est, bool ovr) |
1da177e4 LT |
596 | { |
597 | int err; | |
598 | struct tcf_exts e; | |
599 | ||
5da57f42 | 600 | tcf_exts_init(&e, TCA_U32_ACT, TCA_U32_POLICE); |
2f7ef2f8 | 601 | err = tcf_exts_validate(net, tp, tb, est, &e, ovr); |
1da177e4 LT |
602 | if (err < 0) |
603 | return err; | |
604 | ||
605 | err = -EINVAL; | |
add93b61 | 606 | if (tb[TCA_U32_LINK]) { |
1587bac4 | 607 | u32 handle = nla_get_u32(tb[TCA_U32_LINK]); |
47a1a1d4 | 608 | struct tc_u_hnode *ht_down = NULL, *ht_old; |
1da177e4 LT |
609 | |
610 | if (TC_U32_KEY(handle)) | |
611 | goto errout; | |
612 | ||
613 | if (handle) { | |
614 | ht_down = u32_lookup_ht(ht->tp_c, handle); | |
615 | ||
616 | if (ht_down == NULL) | |
617 | goto errout; | |
618 | ht_down->refcnt++; | |
619 | } | |
620 | ||
1ce87720 JF |
621 | ht_old = rtnl_dereference(n->ht_down); |
622 | rcu_assign_pointer(n->ht_down, ht_down); | |
1da177e4 | 623 | |
47a1a1d4 PM |
624 | if (ht_old) |
625 | ht_old->refcnt--; | |
1da177e4 | 626 | } |
add93b61 | 627 | if (tb[TCA_U32_CLASSID]) { |
1587bac4 | 628 | n->res.classid = nla_get_u32(tb[TCA_U32_CLASSID]); |
1da177e4 LT |
629 | tcf_bind_filter(tp, &n->res, base); |
630 | } | |
631 | ||
632 | #ifdef CONFIG_NET_CLS_IND | |
add93b61 | 633 | if (tb[TCA_U32_INDEV]) { |
2519a602 WC |
634 | int ret; |
635 | ret = tcf_change_indev(net, tb[TCA_U32_INDEV]); | |
636 | if (ret < 0) | |
1da177e4 | 637 | goto errout; |
2519a602 | 638 | n->ifindex = ret; |
1da177e4 LT |
639 | } |
640 | #endif | |
641 | tcf_exts_change(tp, &n->exts, &e); | |
642 | ||
643 | return 0; | |
644 | errout: | |
18d0264f | 645 | tcf_exts_destroy(&e); |
1da177e4 LT |
646 | return err; |
647 | } | |
648 | ||
de5df632 JF |
649 | static void u32_replace_knode(struct tcf_proto *tp, |
650 | struct tc_u_common *tp_c, | |
651 | struct tc_u_knode *n) | |
652 | { | |
653 | struct tc_u_knode __rcu **ins; | |
654 | struct tc_u_knode *pins; | |
655 | struct tc_u_hnode *ht; | |
656 | ||
657 | if (TC_U32_HTID(n->handle) == TC_U32_ROOT) | |
658 | ht = rtnl_dereference(tp->root); | |
659 | else | |
660 | ht = u32_lookup_ht(tp_c, TC_U32_HTID(n->handle)); | |
661 | ||
662 | ins = &ht->ht[TC_U32_HASH(n->handle)]; | |
663 | ||
664 | /* The node must always exist for it to be replaced if this is not the | |
665 | * case then something went very wrong elsewhere. | |
666 | */ | |
667 | for (pins = rtnl_dereference(*ins); ; | |
668 | ins = &pins->next, pins = rtnl_dereference(*ins)) | |
669 | if (pins->handle == n->handle) | |
670 | break; | |
671 | ||
672 | RCU_INIT_POINTER(n->next, pins->next); | |
673 | rcu_assign_pointer(*ins, n); | |
674 | } | |
675 | ||
676 | static struct tc_u_knode *u32_init_knode(struct tcf_proto *tp, | |
677 | struct tc_u_knode *n) | |
678 | { | |
679 | struct tc_u_knode *new; | |
680 | struct tc_u32_sel *s = &n->sel; | |
681 | ||
682 | new = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), | |
683 | GFP_KERNEL); | |
684 | ||
685 | if (!new) | |
686 | return NULL; | |
687 | ||
688 | RCU_INIT_POINTER(new->next, n->next); | |
689 | new->handle = n->handle; | |
690 | RCU_INIT_POINTER(new->ht_up, n->ht_up); | |
691 | ||
692 | #ifdef CONFIG_NET_CLS_IND | |
693 | new->ifindex = n->ifindex; | |
694 | #endif | |
695 | new->fshift = n->fshift; | |
696 | new->res = n->res; | |
697 | RCU_INIT_POINTER(new->ht_down, n->ht_down); | |
698 | ||
699 | /* bump reference count as long as we hold pointer to structure */ | |
700 | if (new->ht_down) | |
701 | new->ht_down->refcnt++; | |
702 | ||
703 | #ifdef CONFIG_CLS_U32_PERF | |
704 | /* Statistics may be incremented by readers during update | |
705 | * so we must keep them in tact. When the node is later destroyed | |
706 | * a special destroy call must be made to not free the pf memory. | |
707 | */ | |
708 | new->pf = n->pf; | |
709 | #endif | |
710 | ||
711 | #ifdef CONFIG_CLS_U32_MARK | |
712 | new->val = n->val; | |
713 | new->mask = n->mask; | |
714 | /* Similarly success statistics must be moved as pointers */ | |
715 | new->pcpu_success = n->pcpu_success; | |
716 | #endif | |
717 | new->tp = tp; | |
718 | memcpy(&new->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key)); | |
719 | ||
720 | tcf_exts_init(&new->exts, TCA_U32_ACT, TCA_U32_POLICE); | |
721 | ||
722 | return new; | |
723 | } | |
724 | ||
c1b52739 | 725 | static int u32_change(struct net *net, struct sk_buff *in_skb, |
af4c6641 | 726 | struct tcf_proto *tp, unsigned long base, u32 handle, |
add93b61 | 727 | struct nlattr **tca, |
2f7ef2f8 | 728 | unsigned long *arg, bool ovr) |
1da177e4 LT |
729 | { |
730 | struct tc_u_common *tp_c = tp->data; | |
731 | struct tc_u_hnode *ht; | |
732 | struct tc_u_knode *n; | |
733 | struct tc_u32_sel *s; | |
add93b61 PM |
734 | struct nlattr *opt = tca[TCA_OPTIONS]; |
735 | struct nlattr *tb[TCA_U32_MAX + 1]; | |
1da177e4 LT |
736 | u32 htid; |
737 | int err; | |
459d5f62 JF |
738 | #ifdef CONFIG_CLS_U32_PERF |
739 | size_t size; | |
740 | #endif | |
1da177e4 LT |
741 | |
742 | if (opt == NULL) | |
743 | return handle ? -EINVAL : 0; | |
744 | ||
6fa8c014 | 745 | err = nla_parse_nested(tb, TCA_U32_MAX, opt, u32_policy); |
cee63723 PM |
746 | if (err < 0) |
747 | return err; | |
1da177e4 | 748 | |
cc7ec456 ED |
749 | n = (struct tc_u_knode *)*arg; |
750 | if (n) { | |
de5df632 JF |
751 | struct tc_u_knode *new; |
752 | ||
1da177e4 LT |
753 | if (TC_U32_KEY(n->handle) == 0) |
754 | return -EINVAL; | |
755 | ||
de5df632 JF |
756 | new = u32_init_knode(tp, n); |
757 | if (!new) | |
758 | return -ENOMEM; | |
759 | ||
760 | err = u32_set_parms(net, tp, base, | |
761 | rtnl_dereference(n->ht_up), new, tb, | |
762 | tca[TCA_RATE], ovr); | |
763 | ||
764 | if (err) { | |
765 | u32_destroy_key(tp, new, false); | |
766 | return err; | |
767 | } | |
768 | ||
769 | u32_replace_knode(tp, tp_c, new); | |
a0efb80c | 770 | tcf_unbind_filter(tp, &n->res); |
de5df632 JF |
771 | call_rcu(&n->rcu, u32_delete_key_rcu); |
772 | return 0; | |
1da177e4 LT |
773 | } |
774 | ||
add93b61 | 775 | if (tb[TCA_U32_DIVISOR]) { |
cc7ec456 | 776 | unsigned int divisor = nla_get_u32(tb[TCA_U32_DIVISOR]); |
1da177e4 LT |
777 | |
778 | if (--divisor > 0x100) | |
779 | return -EINVAL; | |
780 | if (TC_U32_KEY(handle)) | |
781 | return -EINVAL; | |
782 | if (handle == 0) { | |
783 | handle = gen_new_htid(tp->data); | |
784 | if (handle == 0) | |
785 | return -ENOMEM; | |
786 | } | |
cc7ec456 | 787 | ht = kzalloc(sizeof(*ht) + divisor*sizeof(void *), GFP_KERNEL); |
1da177e4 LT |
788 | if (ht == NULL) |
789 | return -ENOBUFS; | |
1da177e4 | 790 | ht->tp_c = tp_c; |
e56cfad1 | 791 | ht->refcnt = 1; |
1da177e4 LT |
792 | ht->divisor = divisor; |
793 | ht->handle = handle; | |
794 | ht->prio = tp->prio; | |
1ce87720 JF |
795 | RCU_INIT_POINTER(ht->next, tp_c->hlist); |
796 | rcu_assign_pointer(tp_c->hlist, ht); | |
1da177e4 LT |
797 | *arg = (unsigned long)ht; |
798 | return 0; | |
799 | } | |
800 | ||
add93b61 | 801 | if (tb[TCA_U32_HASH]) { |
1587bac4 | 802 | htid = nla_get_u32(tb[TCA_U32_HASH]); |
1da177e4 | 803 | if (TC_U32_HTID(htid) == TC_U32_ROOT) { |
1ce87720 | 804 | ht = rtnl_dereference(tp->root); |
1da177e4 LT |
805 | htid = ht->handle; |
806 | } else { | |
807 | ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid)); | |
808 | if (ht == NULL) | |
809 | return -EINVAL; | |
810 | } | |
811 | } else { | |
1ce87720 | 812 | ht = rtnl_dereference(tp->root); |
1da177e4 LT |
813 | htid = ht->handle; |
814 | } | |
815 | ||
816 | if (ht->divisor < TC_U32_HASH(htid)) | |
817 | return -EINVAL; | |
818 | ||
819 | if (handle) { | |
820 | if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid)) | |
821 | return -EINVAL; | |
822 | handle = htid | TC_U32_NODE(handle); | |
823 | } else | |
824 | handle = gen_new_kid(ht, htid); | |
825 | ||
6fa8c014 | 826 | if (tb[TCA_U32_SEL] == NULL) |
1da177e4 LT |
827 | return -EINVAL; |
828 | ||
add93b61 | 829 | s = nla_data(tb[TCA_U32_SEL]); |
1da177e4 | 830 | |
0da974f4 | 831 | n = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL); |
1da177e4 LT |
832 | if (n == NULL) |
833 | return -ENOBUFS; | |
834 | ||
1da177e4 | 835 | #ifdef CONFIG_CLS_U32_PERF |
459d5f62 JF |
836 | size = sizeof(struct tc_u32_pcnt) + s->nkeys * sizeof(u64); |
837 | n->pf = __alloc_percpu(size, __alignof__(struct tc_u32_pcnt)); | |
838 | if (!n->pf) { | |
1da177e4 LT |
839 | kfree(n); |
840 | return -ENOBUFS; | |
841 | } | |
1da177e4 LT |
842 | #endif |
843 | ||
844 | memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key)); | |
a96366bf | 845 | RCU_INIT_POINTER(n->ht_up, ht); |
1da177e4 | 846 | n->handle = handle; |
b2268016 | 847 | n->fshift = s->hmask ? ffs(ntohl(s->hmask)) - 1 : 0; |
5da57f42 | 848 | tcf_exts_init(&n->exts, TCA_U32_ACT, TCA_U32_POLICE); |
1ce87720 | 849 | n->tp = tp; |
1da177e4 LT |
850 | |
851 | #ifdef CONFIG_CLS_U32_MARK | |
459d5f62 | 852 | n->pcpu_success = alloc_percpu(u32); |
a1ddcfee JF |
853 | if (!n->pcpu_success) { |
854 | err = -ENOMEM; | |
855 | goto errout; | |
856 | } | |
459d5f62 | 857 | |
add93b61 | 858 | if (tb[TCA_U32_MARK]) { |
1da177e4 LT |
859 | struct tc_u32_mark *mark; |
860 | ||
add93b61 | 861 | mark = nla_data(tb[TCA_U32_MARK]); |
459d5f62 JF |
862 | n->val = mark->val; |
863 | n->mask = mark->mask; | |
1da177e4 LT |
864 | } |
865 | #endif | |
866 | ||
2f7ef2f8 | 867 | err = u32_set_parms(net, tp, base, ht, n, tb, tca[TCA_RATE], ovr); |
1da177e4 | 868 | if (err == 0) { |
1ce87720 JF |
869 | struct tc_u_knode __rcu **ins; |
870 | struct tc_u_knode *pins; | |
871 | ||
872 | ins = &ht->ht[TC_U32_HASH(handle)]; | |
873 | for (pins = rtnl_dereference(*ins); pins; | |
874 | ins = &pins->next, pins = rtnl_dereference(*ins)) | |
875 | if (TC_U32_NODE(handle) < TC_U32_NODE(pins->handle)) | |
1da177e4 LT |
876 | break; |
877 | ||
1ce87720 JF |
878 | RCU_INIT_POINTER(n->next, pins); |
879 | rcu_assign_pointer(*ins, n); | |
1da177e4 LT |
880 | |
881 | *arg = (unsigned long)n; | |
882 | return 0; | |
883 | } | |
a1ddcfee JF |
884 | |
885 | #ifdef CONFIG_CLS_U32_MARK | |
886 | free_percpu(n->pcpu_success); | |
a2aeb02a | 887 | errout: |
a1ddcfee JF |
888 | #endif |
889 | ||
1da177e4 | 890 | #ifdef CONFIG_CLS_U32_PERF |
1ce87720 | 891 | free_percpu(n->pf); |
1da177e4 LT |
892 | #endif |
893 | kfree(n); | |
894 | return err; | |
895 | } | |
896 | ||
897 | static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg) | |
898 | { | |
899 | struct tc_u_common *tp_c = tp->data; | |
900 | struct tc_u_hnode *ht; | |
901 | struct tc_u_knode *n; | |
cc7ec456 | 902 | unsigned int h; |
1da177e4 LT |
903 | |
904 | if (arg->stop) | |
905 | return; | |
906 | ||
1ce87720 JF |
907 | for (ht = rtnl_dereference(tp_c->hlist); |
908 | ht; | |
909 | ht = rtnl_dereference(ht->next)) { | |
1da177e4 LT |
910 | if (ht->prio != tp->prio) |
911 | continue; | |
912 | if (arg->count >= arg->skip) { | |
913 | if (arg->fn(tp, (unsigned long)ht, arg) < 0) { | |
914 | arg->stop = 1; | |
915 | return; | |
916 | } | |
917 | } | |
918 | arg->count++; | |
919 | for (h = 0; h <= ht->divisor; h++) { | |
1ce87720 JF |
920 | for (n = rtnl_dereference(ht->ht[h]); |
921 | n; | |
922 | n = rtnl_dereference(n->next)) { | |
1da177e4 LT |
923 | if (arg->count < arg->skip) { |
924 | arg->count++; | |
925 | continue; | |
926 | } | |
927 | if (arg->fn(tp, (unsigned long)n, arg) < 0) { | |
928 | arg->stop = 1; | |
929 | return; | |
930 | } | |
931 | arg->count++; | |
932 | } | |
933 | } | |
934 | } | |
935 | } | |
936 | ||
832d1d5b | 937 | static int u32_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, |
1da177e4 LT |
938 | struct sk_buff *skb, struct tcmsg *t) |
939 | { | |
cc7ec456 | 940 | struct tc_u_knode *n = (struct tc_u_knode *)fh; |
1ce87720 | 941 | struct tc_u_hnode *ht_up, *ht_down; |
4b3550ef | 942 | struct nlattr *nest; |
1da177e4 LT |
943 | |
944 | if (n == NULL) | |
945 | return skb->len; | |
946 | ||
947 | t->tcm_handle = n->handle; | |
948 | ||
4b3550ef PM |
949 | nest = nla_nest_start(skb, TCA_OPTIONS); |
950 | if (nest == NULL) | |
951 | goto nla_put_failure; | |
1da177e4 LT |
952 | |
953 | if (TC_U32_KEY(n->handle) == 0) { | |
cc7ec456 ED |
954 | struct tc_u_hnode *ht = (struct tc_u_hnode *)fh; |
955 | u32 divisor = ht->divisor + 1; | |
956 | ||
1b34ec43 DM |
957 | if (nla_put_u32(skb, TCA_U32_DIVISOR, divisor)) |
958 | goto nla_put_failure; | |
1da177e4 | 959 | } else { |
459d5f62 JF |
960 | #ifdef CONFIG_CLS_U32_PERF |
961 | struct tc_u32_pcnt *gpf; | |
459d5f62 | 962 | int cpu; |
80aab73d | 963 | #endif |
459d5f62 | 964 | |
1b34ec43 DM |
965 | if (nla_put(skb, TCA_U32_SEL, |
966 | sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key), | |
967 | &n->sel)) | |
968 | goto nla_put_failure; | |
1ce87720 JF |
969 | |
970 | ht_up = rtnl_dereference(n->ht_up); | |
971 | if (ht_up) { | |
1da177e4 | 972 | u32 htid = n->handle & 0xFFFFF000; |
1b34ec43 DM |
973 | if (nla_put_u32(skb, TCA_U32_HASH, htid)) |
974 | goto nla_put_failure; | |
1da177e4 | 975 | } |
1b34ec43 DM |
976 | if (n->res.classid && |
977 | nla_put_u32(skb, TCA_U32_CLASSID, n->res.classid)) | |
978 | goto nla_put_failure; | |
1ce87720 JF |
979 | |
980 | ht_down = rtnl_dereference(n->ht_down); | |
981 | if (ht_down && | |
982 | nla_put_u32(skb, TCA_U32_LINK, ht_down->handle)) | |
1b34ec43 | 983 | goto nla_put_failure; |
1da177e4 LT |
984 | |
985 | #ifdef CONFIG_CLS_U32_MARK | |
459d5f62 JF |
986 | if ((n->val || n->mask)) { |
987 | struct tc_u32_mark mark = {.val = n->val, | |
988 | .mask = n->mask, | |
989 | .success = 0}; | |
80aab73d | 990 | int cpum; |
459d5f62 | 991 | |
80aab73d JF |
992 | for_each_possible_cpu(cpum) { |
993 | __u32 cnt = *per_cpu_ptr(n->pcpu_success, cpum); | |
459d5f62 JF |
994 | |
995 | mark.success += cnt; | |
996 | } | |
997 | ||
998 | if (nla_put(skb, TCA_U32_MARK, sizeof(mark), &mark)) | |
999 | goto nla_put_failure; | |
1000 | } | |
1da177e4 LT |
1001 | #endif |
1002 | ||
5da57f42 | 1003 | if (tcf_exts_dump(skb, &n->exts) < 0) |
add93b61 | 1004 | goto nla_put_failure; |
1da177e4 LT |
1005 | |
1006 | #ifdef CONFIG_NET_CLS_IND | |
2519a602 WC |
1007 | if (n->ifindex) { |
1008 | struct net_device *dev; | |
1009 | dev = __dev_get_by_index(net, n->ifindex); | |
1010 | if (dev && nla_put_string(skb, TCA_U32_INDEV, dev->name)) | |
1011 | goto nla_put_failure; | |
1012 | } | |
1da177e4 LT |
1013 | #endif |
1014 | #ifdef CONFIG_CLS_U32_PERF | |
459d5f62 JF |
1015 | gpf = kzalloc(sizeof(struct tc_u32_pcnt) + |
1016 | n->sel.nkeys * sizeof(u64), | |
1017 | GFP_KERNEL); | |
1018 | if (!gpf) | |
1019 | goto nla_put_failure; | |
1020 | ||
1021 | for_each_possible_cpu(cpu) { | |
1022 | int i; | |
1023 | struct tc_u32_pcnt *pf = per_cpu_ptr(n->pf, cpu); | |
1024 | ||
1025 | gpf->rcnt += pf->rcnt; | |
1026 | gpf->rhit += pf->rhit; | |
1027 | for (i = 0; i < n->sel.nkeys; i++) | |
1028 | gpf->kcnts[i] += pf->kcnts[i]; | |
1029 | } | |
1030 | ||
1b34ec43 DM |
1031 | if (nla_put(skb, TCA_U32_PCNT, |
1032 | sizeof(struct tc_u32_pcnt) + n->sel.nkeys*sizeof(u64), | |
459d5f62 JF |
1033 | gpf)) { |
1034 | kfree(gpf); | |
1b34ec43 | 1035 | goto nla_put_failure; |
459d5f62 JF |
1036 | } |
1037 | kfree(gpf); | |
1da177e4 LT |
1038 | #endif |
1039 | } | |
1040 | ||
4b3550ef PM |
1041 | nla_nest_end(skb, nest); |
1042 | ||
1da177e4 | 1043 | if (TC_U32_KEY(n->handle)) |
5da57f42 | 1044 | if (tcf_exts_dump_stats(skb, &n->exts) < 0) |
add93b61 | 1045 | goto nla_put_failure; |
1da177e4 LT |
1046 | return skb->len; |
1047 | ||
add93b61 | 1048 | nla_put_failure: |
4b3550ef | 1049 | nla_nest_cancel(skb, nest); |
1da177e4 LT |
1050 | return -1; |
1051 | } | |
1052 | ||
2eb9d75c | 1053 | static struct tcf_proto_ops cls_u32_ops __read_mostly = { |
1da177e4 LT |
1054 | .kind = "u32", |
1055 | .classify = u32_classify, | |
1056 | .init = u32_init, | |
1057 | .destroy = u32_destroy, | |
1058 | .get = u32_get, | |
1da177e4 LT |
1059 | .change = u32_change, |
1060 | .delete = u32_delete, | |
1061 | .walk = u32_walk, | |
1062 | .dump = u32_dump, | |
1063 | .owner = THIS_MODULE, | |
1064 | }; | |
1065 | ||
1066 | static int __init init_u32(void) | |
1067 | { | |
6ff9c364 | 1068 | pr_info("u32 classifier\n"); |
1da177e4 | 1069 | #ifdef CONFIG_CLS_U32_PERF |
6ff9c364 | 1070 | pr_info(" Performance counters on\n"); |
1da177e4 | 1071 | #endif |
1da177e4 | 1072 | #ifdef CONFIG_NET_CLS_IND |
6ff9c364 | 1073 | pr_info(" input device check on\n"); |
1da177e4 LT |
1074 | #endif |
1075 | #ifdef CONFIG_NET_CLS_ACT | |
6ff9c364 | 1076 | pr_info(" Actions configured\n"); |
1da177e4 LT |
1077 | #endif |
1078 | return register_tcf_proto_ops(&cls_u32_ops); | |
1079 | } | |
1080 | ||
10297b99 | 1081 | static void __exit exit_u32(void) |
1da177e4 LT |
1082 | { |
1083 | unregister_tcf_proto_ops(&cls_u32_ops); | |
1084 | } | |
1085 | ||
1086 | module_init(init_u32) | |
1087 | module_exit(exit_u32) | |
1088 | MODULE_LICENSE("GPL"); |