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> | |
a1b7c5fd | 46 | #include <linux/netdevice.h> |
1da177e4 | 47 | |
cc7ec456 | 48 | struct tc_u_knode { |
1ce87720 | 49 | struct tc_u_knode __rcu *next; |
1da177e4 | 50 | u32 handle; |
1ce87720 | 51 | struct tc_u_hnode __rcu *ht_up; |
1da177e4 LT |
52 | struct tcf_exts exts; |
53 | #ifdef CONFIG_NET_CLS_IND | |
2519a602 | 54 | int ifindex; |
1da177e4 LT |
55 | #endif |
56 | u8 fshift; | |
57 | struct tcf_result res; | |
1ce87720 | 58 | struct tc_u_hnode __rcu *ht_down; |
1da177e4 | 59 | #ifdef CONFIG_CLS_U32_PERF |
459d5f62 | 60 | struct tc_u32_pcnt __percpu *pf; |
1da177e4 LT |
61 | #endif |
62 | #ifdef CONFIG_CLS_U32_MARK | |
459d5f62 JF |
63 | u32 val; |
64 | u32 mask; | |
65 | u32 __percpu *pcpu_success; | |
1da177e4 | 66 | #endif |
1ce87720 | 67 | struct tcf_proto *tp; |
1ce87720 | 68 | struct rcu_head rcu; |
4e2840ee JF |
69 | /* The 'sel' field MUST be the last field in structure to allow for |
70 | * tc_u32_keys allocated at end of structure. | |
71 | */ | |
72 | struct tc_u32_sel sel; | |
1da177e4 LT |
73 | }; |
74 | ||
cc7ec456 | 75 | struct tc_u_hnode { |
1ce87720 | 76 | struct tc_u_hnode __rcu *next; |
1da177e4 LT |
77 | u32 handle; |
78 | u32 prio; | |
79 | struct tc_u_common *tp_c; | |
80 | int refcnt; | |
cc7ec456 | 81 | unsigned int divisor; |
1ce87720 | 82 | struct rcu_head rcu; |
5778d39d WC |
83 | /* The 'ht' field MUST be the last field in structure to allow for |
84 | * more entries allocated at end of structure. | |
85 | */ | |
86 | struct tc_u_knode __rcu *ht[1]; | |
1da177e4 LT |
87 | }; |
88 | ||
cc7ec456 | 89 | struct tc_u_common { |
1ce87720 | 90 | struct tc_u_hnode __rcu *hlist; |
1da177e4 LT |
91 | struct Qdisc *q; |
92 | int refcnt; | |
93 | u32 hgenerator; | |
1ce87720 | 94 | struct rcu_head rcu; |
1da177e4 LT |
95 | }; |
96 | ||
cc7ec456 ED |
97 | static inline unsigned int u32_hash_fold(__be32 key, |
98 | const struct tc_u32_sel *sel, | |
99 | u8 fshift) | |
1da177e4 | 100 | { |
cc7ec456 | 101 | unsigned int h = ntohl(key & sel->hmask) >> fshift; |
1da177e4 LT |
102 | |
103 | return h; | |
104 | } | |
105 | ||
dc7f9f6e | 106 | static int u32_classify(struct sk_buff *skb, const struct tcf_proto *tp, struct tcf_result *res) |
1da177e4 LT |
107 | { |
108 | struct { | |
109 | struct tc_u_knode *knode; | |
fbc2e7d9 | 110 | unsigned int off; |
1da177e4 LT |
111 | } stack[TC_U32_MAXDEPTH]; |
112 | ||
1ce87720 | 113 | struct tc_u_hnode *ht = rcu_dereference_bh(tp->root); |
fbc2e7d9 | 114 | unsigned int off = skb_network_offset(skb); |
1da177e4 LT |
115 | struct tc_u_knode *n; |
116 | int sdepth = 0; | |
117 | int off2 = 0; | |
118 | int sel = 0; | |
119 | #ifdef CONFIG_CLS_U32_PERF | |
120 | int j; | |
121 | #endif | |
122 | int i, r; | |
123 | ||
124 | next_ht: | |
1ce87720 | 125 | n = rcu_dereference_bh(ht->ht[sel]); |
1da177e4 LT |
126 | |
127 | next_knode: | |
128 | if (n) { | |
129 | struct tc_u32_key *key = n->sel.keys; | |
130 | ||
131 | #ifdef CONFIG_CLS_U32_PERF | |
459d5f62 | 132 | __this_cpu_inc(n->pf->rcnt); |
1da177e4 LT |
133 | j = 0; |
134 | #endif | |
135 | ||
136 | #ifdef CONFIG_CLS_U32_MARK | |
459d5f62 | 137 | if ((skb->mark & n->mask) != n->val) { |
1ce87720 | 138 | n = rcu_dereference_bh(n->next); |
1da177e4 LT |
139 | goto next_knode; |
140 | } else { | |
459d5f62 | 141 | __this_cpu_inc(*n->pcpu_success); |
1da177e4 LT |
142 | } |
143 | #endif | |
144 | ||
cc7ec456 | 145 | for (i = n->sel.nkeys; i > 0; i--, key++) { |
66d50d25 | 146 | int toff = off + key->off + (off2 & key->offmask); |
86fce3ba | 147 | __be32 *data, hdata; |
fbc2e7d9 | 148 | |
4e18b3ed | 149 | if (skb_headroom(skb) + toff > INT_MAX) |
66d50d25 | 150 | goto out; |
151 | ||
86fce3ba | 152 | data = skb_header_pointer(skb, toff, 4, &hdata); |
fbc2e7d9 CG |
153 | if (!data) |
154 | goto out; | |
155 | if ((*data ^ key->val) & key->mask) { | |
1ce87720 | 156 | n = rcu_dereference_bh(n->next); |
1da177e4 LT |
157 | goto next_knode; |
158 | } | |
159 | #ifdef CONFIG_CLS_U32_PERF | |
459d5f62 | 160 | __this_cpu_inc(n->pf->kcnts[j]); |
1da177e4 LT |
161 | j++; |
162 | #endif | |
163 | } | |
1ce87720 JF |
164 | |
165 | ht = rcu_dereference_bh(n->ht_down); | |
166 | if (!ht) { | |
1da177e4 | 167 | check_terminal: |
cc7ec456 | 168 | if (n->sel.flags & TC_U32_TERMINAL) { |
1da177e4 LT |
169 | |
170 | *res = n->res; | |
171 | #ifdef CONFIG_NET_CLS_IND | |
2519a602 | 172 | if (!tcf_match_indev(skb, n->ifindex)) { |
1ce87720 | 173 | n = rcu_dereference_bh(n->next); |
1da177e4 LT |
174 | goto next_knode; |
175 | } | |
176 | #endif | |
177 | #ifdef CONFIG_CLS_U32_PERF | |
459d5f62 | 178 | __this_cpu_inc(n->pf->rhit); |
1da177e4 LT |
179 | #endif |
180 | r = tcf_exts_exec(skb, &n->exts, res); | |
181 | if (r < 0) { | |
1ce87720 | 182 | n = rcu_dereference_bh(n->next); |
1da177e4 LT |
183 | goto next_knode; |
184 | } | |
185 | ||
186 | return r; | |
187 | } | |
1ce87720 | 188 | n = rcu_dereference_bh(n->next); |
1da177e4 LT |
189 | goto next_knode; |
190 | } | |
191 | ||
192 | /* PUSH */ | |
193 | if (sdepth >= TC_U32_MAXDEPTH) | |
194 | goto deadloop; | |
195 | stack[sdepth].knode = n; | |
fbc2e7d9 | 196 | stack[sdepth].off = off; |
1da177e4 LT |
197 | sdepth++; |
198 | ||
1ce87720 | 199 | ht = rcu_dereference_bh(n->ht_down); |
1da177e4 | 200 | sel = 0; |
fbc2e7d9 | 201 | if (ht->divisor) { |
86fce3ba | 202 | __be32 *data, hdata; |
fbc2e7d9 CG |
203 | |
204 | data = skb_header_pointer(skb, off + n->sel.hoff, 4, | |
86fce3ba | 205 | &hdata); |
fbc2e7d9 CG |
206 | if (!data) |
207 | goto out; | |
208 | sel = ht->divisor & u32_hash_fold(*data, &n->sel, | |
209 | n->fshift); | |
210 | } | |
cc7ec456 | 211 | if (!(n->sel.flags & (TC_U32_VAROFFSET | TC_U32_OFFSET | TC_U32_EAT))) |
1da177e4 LT |
212 | goto next_ht; |
213 | ||
cc7ec456 | 214 | if (n->sel.flags & (TC_U32_OFFSET | TC_U32_VAROFFSET)) { |
1da177e4 | 215 | off2 = n->sel.off + 3; |
fbc2e7d9 | 216 | if (n->sel.flags & TC_U32_VAROFFSET) { |
86fce3ba | 217 | __be16 *data, hdata; |
fbc2e7d9 CG |
218 | |
219 | data = skb_header_pointer(skb, | |
220 | off + n->sel.offoff, | |
86fce3ba | 221 | 2, &hdata); |
fbc2e7d9 CG |
222 | if (!data) |
223 | goto out; | |
224 | off2 += ntohs(n->sel.offmask & *data) >> | |
225 | n->sel.offshift; | |
226 | } | |
1da177e4 LT |
227 | off2 &= ~3; |
228 | } | |
cc7ec456 | 229 | if (n->sel.flags & TC_U32_EAT) { |
fbc2e7d9 | 230 | off += off2; |
1da177e4 LT |
231 | off2 = 0; |
232 | } | |
233 | ||
fbc2e7d9 | 234 | if (off < skb->len) |
1da177e4 LT |
235 | goto next_ht; |
236 | } | |
237 | ||
238 | /* POP */ | |
239 | if (sdepth--) { | |
240 | n = stack[sdepth].knode; | |
1ce87720 | 241 | ht = rcu_dereference_bh(n->ht_up); |
fbc2e7d9 | 242 | off = stack[sdepth].off; |
1da177e4 LT |
243 | goto check_terminal; |
244 | } | |
fbc2e7d9 | 245 | out: |
1da177e4 LT |
246 | return -1; |
247 | ||
248 | deadloop: | |
e87cc472 | 249 | net_warn_ratelimited("cls_u32: dead loop\n"); |
1da177e4 LT |
250 | return -1; |
251 | } | |
252 | ||
cc7ec456 | 253 | static struct tc_u_hnode * |
1da177e4 LT |
254 | u32_lookup_ht(struct tc_u_common *tp_c, u32 handle) |
255 | { | |
256 | struct tc_u_hnode *ht; | |
257 | ||
1ce87720 JF |
258 | for (ht = rtnl_dereference(tp_c->hlist); |
259 | ht; | |
260 | ht = rtnl_dereference(ht->next)) | |
1da177e4 LT |
261 | if (ht->handle == handle) |
262 | break; | |
263 | ||
264 | return ht; | |
265 | } | |
266 | ||
cc7ec456 | 267 | static struct tc_u_knode * |
1da177e4 LT |
268 | u32_lookup_key(struct tc_u_hnode *ht, u32 handle) |
269 | { | |
cc7ec456 | 270 | unsigned int sel; |
1da177e4 LT |
271 | struct tc_u_knode *n = NULL; |
272 | ||
273 | sel = TC_U32_HASH(handle); | |
274 | if (sel > ht->divisor) | |
275 | goto out; | |
276 | ||
1ce87720 JF |
277 | for (n = rtnl_dereference(ht->ht[sel]); |
278 | n; | |
279 | n = rtnl_dereference(n->next)) | |
1da177e4 LT |
280 | if (n->handle == handle) |
281 | break; | |
282 | out: | |
283 | return n; | |
284 | } | |
285 | ||
286 | ||
287 | static unsigned long u32_get(struct tcf_proto *tp, u32 handle) | |
288 | { | |
289 | struct tc_u_hnode *ht; | |
290 | struct tc_u_common *tp_c = tp->data; | |
291 | ||
292 | if (TC_U32_HTID(handle) == TC_U32_ROOT) | |
1ce87720 | 293 | ht = rtnl_dereference(tp->root); |
1da177e4 LT |
294 | else |
295 | ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle)); | |
296 | ||
297 | if (!ht) | |
298 | return 0; | |
299 | ||
300 | if (TC_U32_KEY(handle) == 0) | |
301 | return (unsigned long)ht; | |
302 | ||
303 | return (unsigned long)u32_lookup_key(ht, handle); | |
304 | } | |
305 | ||
1da177e4 LT |
306 | static u32 gen_new_htid(struct tc_u_common *tp_c) |
307 | { | |
308 | int i = 0x800; | |
309 | ||
1ce87720 JF |
310 | /* hgenerator only used inside rtnl lock it is safe to increment |
311 | * without read _copy_ update semantics | |
312 | */ | |
1da177e4 LT |
313 | do { |
314 | if (++tp_c->hgenerator == 0x7FF) | |
315 | tp_c->hgenerator = 1; | |
cc7ec456 | 316 | } while (--i > 0 && u32_lookup_ht(tp_c, (tp_c->hgenerator|0x800)<<20)); |
1da177e4 LT |
317 | |
318 | return i > 0 ? (tp_c->hgenerator|0x800)<<20 : 0; | |
319 | } | |
320 | ||
321 | static int u32_init(struct tcf_proto *tp) | |
322 | { | |
323 | struct tc_u_hnode *root_ht; | |
324 | struct tc_u_common *tp_c; | |
325 | ||
72b25a91 | 326 | tp_c = tp->q->u32_node; |
1da177e4 | 327 | |
0da974f4 | 328 | root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL); |
1da177e4 LT |
329 | if (root_ht == NULL) |
330 | return -ENOBUFS; | |
331 | ||
1da177e4 LT |
332 | root_ht->divisor = 0; |
333 | root_ht->refcnt++; | |
334 | root_ht->handle = tp_c ? gen_new_htid(tp_c) : 0x80000000; | |
335 | root_ht->prio = tp->prio; | |
336 | ||
337 | if (tp_c == NULL) { | |
0da974f4 | 338 | tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL); |
1da177e4 LT |
339 | if (tp_c == NULL) { |
340 | kfree(root_ht); | |
341 | return -ENOBUFS; | |
342 | } | |
1da177e4 | 343 | tp_c->q = tp->q; |
72b25a91 | 344 | tp->q->u32_node = tp_c; |
1da177e4 LT |
345 | } |
346 | ||
347 | tp_c->refcnt++; | |
1ce87720 JF |
348 | RCU_INIT_POINTER(root_ht->next, tp_c->hlist); |
349 | rcu_assign_pointer(tp_c->hlist, root_ht); | |
1da177e4 LT |
350 | root_ht->tp_c = tp_c; |
351 | ||
1ce87720 | 352 | rcu_assign_pointer(tp->root, root_ht); |
1da177e4 LT |
353 | tp->data = tp_c; |
354 | return 0; | |
355 | } | |
356 | ||
de5df632 JF |
357 | static int u32_destroy_key(struct tcf_proto *tp, |
358 | struct tc_u_knode *n, | |
359 | bool free_pf) | |
1da177e4 | 360 | { |
18d0264f | 361 | tcf_exts_destroy(&n->exts); |
1da177e4 LT |
362 | if (n->ht_down) |
363 | n->ht_down->refcnt--; | |
364 | #ifdef CONFIG_CLS_U32_PERF | |
de5df632 JF |
365 | if (free_pf) |
366 | free_percpu(n->pf); | |
a1ddcfee JF |
367 | #endif |
368 | #ifdef CONFIG_CLS_U32_MARK | |
de5df632 JF |
369 | if (free_pf) |
370 | free_percpu(n->pcpu_success); | |
1da177e4 LT |
371 | #endif |
372 | kfree(n); | |
373 | return 0; | |
374 | } | |
375 | ||
de5df632 JF |
376 | /* u32_delete_key_rcu should be called when free'ing a copied |
377 | * version of a tc_u_knode obtained from u32_init_knode(). When | |
378 | * copies are obtained from u32_init_knode() the statistics are | |
379 | * shared between the old and new copies to allow readers to | |
380 | * continue to update the statistics during the copy. To support | |
381 | * this the u32_delete_key_rcu variant does not free the percpu | |
382 | * statistics. | |
383 | */ | |
1ce87720 JF |
384 | static void u32_delete_key_rcu(struct rcu_head *rcu) |
385 | { | |
386 | struct tc_u_knode *key = container_of(rcu, struct tc_u_knode, rcu); | |
387 | ||
de5df632 JF |
388 | u32_destroy_key(key->tp, key, false); |
389 | } | |
390 | ||
391 | /* u32_delete_key_freepf_rcu is the rcu callback variant | |
392 | * that free's the entire structure including the statistics | |
393 | * percpu variables. Only use this if the key is not a copy | |
394 | * returned by u32_init_knode(). See u32_delete_key_rcu() | |
395 | * for the variant that should be used with keys return from | |
396 | * u32_init_knode() | |
397 | */ | |
398 | static void u32_delete_key_freepf_rcu(struct rcu_head *rcu) | |
399 | { | |
400 | struct tc_u_knode *key = container_of(rcu, struct tc_u_knode, rcu); | |
401 | ||
402 | u32_destroy_key(key->tp, key, true); | |
1ce87720 JF |
403 | } |
404 | ||
82d567c2 | 405 | static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode *key) |
1da177e4 | 406 | { |
1ce87720 JF |
407 | struct tc_u_knode __rcu **kp; |
408 | struct tc_u_knode *pkp; | |
a96366bf | 409 | struct tc_u_hnode *ht = rtnl_dereference(key->ht_up); |
1da177e4 LT |
410 | |
411 | if (ht) { | |
1ce87720 JF |
412 | kp = &ht->ht[TC_U32_HASH(key->handle)]; |
413 | for (pkp = rtnl_dereference(*kp); pkp; | |
414 | kp = &pkp->next, pkp = rtnl_dereference(*kp)) { | |
415 | if (pkp == key) { | |
416 | RCU_INIT_POINTER(*kp, key->next); | |
1da177e4 | 417 | |
a0efb80c | 418 | tcf_unbind_filter(tp, &key->res); |
de5df632 | 419 | call_rcu(&key->rcu, u32_delete_key_freepf_rcu); |
1da177e4 LT |
420 | return 0; |
421 | } | |
422 | } | |
423 | } | |
547b792c | 424 | WARN_ON(1); |
1da177e4 LT |
425 | return 0; |
426 | } | |
427 | ||
a1b7c5fd JF |
428 | static void u32_remove_hw_knode(struct tcf_proto *tp, u32 handle) |
429 | { | |
430 | struct net_device *dev = tp->q->dev_queue->dev; | |
431 | struct tc_cls_u32_offload u32_offload = {0}; | |
432 | struct tc_to_netdev offload; | |
433 | ||
434 | offload.type = TC_SETUP_CLSU32; | |
435 | offload.cls_u32 = &u32_offload; | |
436 | ||
6843e7a2 | 437 | if (tc_should_offload(dev)) { |
a1b7c5fd JF |
438 | offload.cls_u32->command = TC_CLSU32_DELETE_KNODE; |
439 | offload.cls_u32->knode.handle = handle; | |
440 | dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, | |
441 | tp->protocol, &offload); | |
442 | } | |
443 | } | |
444 | ||
445 | static void u32_replace_hw_hnode(struct tcf_proto *tp, struct tc_u_hnode *h) | |
446 | { | |
447 | struct net_device *dev = tp->q->dev_queue->dev; | |
448 | struct tc_cls_u32_offload u32_offload = {0}; | |
449 | struct tc_to_netdev offload; | |
450 | ||
451 | offload.type = TC_SETUP_CLSU32; | |
452 | offload.cls_u32 = &u32_offload; | |
453 | ||
6843e7a2 | 454 | if (tc_should_offload(dev)) { |
a1b7c5fd JF |
455 | offload.cls_u32->command = TC_CLSU32_NEW_HNODE; |
456 | offload.cls_u32->hnode.divisor = h->divisor; | |
457 | offload.cls_u32->hnode.handle = h->handle; | |
458 | offload.cls_u32->hnode.prio = h->prio; | |
459 | ||
460 | dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, | |
461 | tp->protocol, &offload); | |
462 | } | |
463 | } | |
464 | ||
465 | static void u32_clear_hw_hnode(struct tcf_proto *tp, struct tc_u_hnode *h) | |
466 | { | |
467 | struct net_device *dev = tp->q->dev_queue->dev; | |
468 | struct tc_cls_u32_offload u32_offload = {0}; | |
469 | struct tc_to_netdev offload; | |
470 | ||
471 | offload.type = TC_SETUP_CLSU32; | |
472 | offload.cls_u32 = &u32_offload; | |
473 | ||
6843e7a2 | 474 | if (tc_should_offload(dev)) { |
a1b7c5fd JF |
475 | offload.cls_u32->command = TC_CLSU32_DELETE_HNODE; |
476 | offload.cls_u32->hnode.divisor = h->divisor; | |
477 | offload.cls_u32->hnode.handle = h->handle; | |
478 | offload.cls_u32->hnode.prio = h->prio; | |
479 | ||
480 | dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, | |
481 | tp->protocol, &offload); | |
482 | } | |
483 | } | |
484 | ||
485 | static void u32_replace_hw_knode(struct tcf_proto *tp, struct tc_u_knode *n) | |
486 | { | |
487 | struct net_device *dev = tp->q->dev_queue->dev; | |
488 | struct tc_cls_u32_offload u32_offload = {0}; | |
489 | struct tc_to_netdev offload; | |
490 | ||
491 | offload.type = TC_SETUP_CLSU32; | |
492 | offload.cls_u32 = &u32_offload; | |
493 | ||
6843e7a2 | 494 | if (tc_should_offload(dev)) { |
a1b7c5fd JF |
495 | offload.cls_u32->command = TC_CLSU32_REPLACE_KNODE; |
496 | offload.cls_u32->knode.handle = n->handle; | |
497 | offload.cls_u32->knode.fshift = n->fshift; | |
498 | #ifdef CONFIG_CLS_U32_MARK | |
499 | offload.cls_u32->knode.val = n->val; | |
500 | offload.cls_u32->knode.mask = n->mask; | |
501 | #else | |
502 | offload.cls_u32->knode.val = 0; | |
503 | offload.cls_u32->knode.mask = 0; | |
504 | #endif | |
505 | offload.cls_u32->knode.sel = &n->sel; | |
506 | offload.cls_u32->knode.exts = &n->exts; | |
507 | if (n->ht_down) | |
508 | offload.cls_u32->knode.link_handle = n->ht_down->handle; | |
509 | ||
510 | dev->netdev_ops->ndo_setup_tc(dev, tp->q->handle, | |
511 | tp->protocol, &offload); | |
512 | } | |
513 | } | |
514 | ||
a0efb80c | 515 | static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht) |
1da177e4 LT |
516 | { |
517 | struct tc_u_knode *n; | |
cc7ec456 | 518 | unsigned int h; |
1da177e4 | 519 | |
cc7ec456 | 520 | for (h = 0; h <= ht->divisor; h++) { |
1ce87720 JF |
521 | while ((n = rtnl_dereference(ht->ht[h])) != NULL) { |
522 | RCU_INIT_POINTER(ht->ht[h], | |
523 | rtnl_dereference(n->next)); | |
a0efb80c | 524 | tcf_unbind_filter(tp, &n->res); |
a1b7c5fd | 525 | u32_remove_hw_knode(tp, n->handle); |
de5df632 | 526 | call_rcu(&n->rcu, u32_delete_key_freepf_rcu); |
1da177e4 LT |
527 | } |
528 | } | |
529 | } | |
530 | ||
531 | static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht) | |
532 | { | |
533 | struct tc_u_common *tp_c = tp->data; | |
1ce87720 JF |
534 | struct tc_u_hnode __rcu **hn; |
535 | struct tc_u_hnode *phn; | |
1da177e4 | 536 | |
547b792c | 537 | WARN_ON(ht->refcnt); |
1da177e4 | 538 | |
a0efb80c | 539 | u32_clear_hnode(tp, ht); |
1da177e4 | 540 | |
1ce87720 JF |
541 | hn = &tp_c->hlist; |
542 | for (phn = rtnl_dereference(*hn); | |
543 | phn; | |
544 | hn = &phn->next, phn = rtnl_dereference(*hn)) { | |
545 | if (phn == ht) { | |
a1b7c5fd | 546 | u32_clear_hw_hnode(tp, ht); |
1ce87720 JF |
547 | RCU_INIT_POINTER(*hn, ht->next); |
548 | kfree_rcu(ht, rcu); | |
1da177e4 LT |
549 | return 0; |
550 | } | |
551 | } | |
552 | ||
1da177e4 LT |
553 | return -ENOENT; |
554 | } | |
555 | ||
1e052be6 CW |
556 | static bool ht_empty(struct tc_u_hnode *ht) |
557 | { | |
558 | unsigned int h; | |
559 | ||
560 | for (h = 0; h <= ht->divisor; h++) | |
561 | if (rcu_access_pointer(ht->ht[h])) | |
562 | return false; | |
563 | ||
564 | return true; | |
565 | } | |
566 | ||
567 | static bool u32_destroy(struct tcf_proto *tp, bool force) | |
1da177e4 LT |
568 | { |
569 | struct tc_u_common *tp_c = tp->data; | |
1ce87720 | 570 | struct tc_u_hnode *root_ht = rtnl_dereference(tp->root); |
1da177e4 | 571 | |
547b792c | 572 | WARN_ON(root_ht == NULL); |
1da177e4 | 573 | |
1e052be6 CW |
574 | if (!force) { |
575 | if (root_ht) { | |
576 | if (root_ht->refcnt > 1) | |
577 | return false; | |
578 | if (root_ht->refcnt == 1) { | |
579 | if (!ht_empty(root_ht)) | |
580 | return false; | |
581 | } | |
582 | } | |
a6c1aea0 WC |
583 | |
584 | if (tp_c->refcnt > 1) | |
585 | return false; | |
586 | ||
587 | if (tp_c->refcnt == 1) { | |
588 | struct tc_u_hnode *ht; | |
589 | ||
590 | for (ht = rtnl_dereference(tp_c->hlist); | |
591 | ht; | |
592 | ht = rtnl_dereference(ht->next)) | |
593 | if (!ht_empty(ht)) | |
594 | return false; | |
595 | } | |
1e052be6 CW |
596 | } |
597 | ||
1da177e4 LT |
598 | if (root_ht && --root_ht->refcnt == 0) |
599 | u32_destroy_hnode(tp, root_ht); | |
600 | ||
601 | if (--tp_c->refcnt == 0) { | |
602 | struct tc_u_hnode *ht; | |
1da177e4 | 603 | |
72b25a91 | 604 | tp->q->u32_node = NULL; |
1da177e4 | 605 | |
1ce87720 JF |
606 | for (ht = rtnl_dereference(tp_c->hlist); |
607 | ht; | |
608 | ht = rtnl_dereference(ht->next)) { | |
e56cfad1 | 609 | ht->refcnt--; |
a0efb80c | 610 | u32_clear_hnode(tp, ht); |
e56cfad1 | 611 | } |
1da177e4 | 612 | |
1ce87720 JF |
613 | while ((ht = rtnl_dereference(tp_c->hlist)) != NULL) { |
614 | RCU_INIT_POINTER(tp_c->hlist, ht->next); | |
615 | kfree_rcu(ht, rcu); | |
3ff50b79 | 616 | } |
1da177e4 LT |
617 | |
618 | kfree(tp_c); | |
619 | } | |
620 | ||
621 | tp->data = NULL; | |
1e052be6 | 622 | return true; |
1da177e4 LT |
623 | } |
624 | ||
625 | static int u32_delete(struct tcf_proto *tp, unsigned long arg) | |
626 | { | |
cc7ec456 | 627 | struct tc_u_hnode *ht = (struct tc_u_hnode *)arg; |
1ce87720 | 628 | struct tc_u_hnode *root_ht = rtnl_dereference(tp->root); |
1da177e4 LT |
629 | |
630 | if (ht == NULL) | |
631 | return 0; | |
632 | ||
a1b7c5fd JF |
633 | if (TC_U32_KEY(ht->handle)) { |
634 | u32_remove_hw_knode(tp, ht->handle); | |
cc7ec456 | 635 | return u32_delete_key(tp, (struct tc_u_knode *)ht); |
a1b7c5fd | 636 | } |
1da177e4 | 637 | |
1ce87720 | 638 | if (root_ht == ht) |
1da177e4 LT |
639 | return -EINVAL; |
640 | ||
e56cfad1 JP |
641 | if (ht->refcnt == 1) { |
642 | ht->refcnt--; | |
1da177e4 | 643 | u32_destroy_hnode(tp, ht); |
e56cfad1 JP |
644 | } else { |
645 | return -EBUSY; | |
646 | } | |
1da177e4 LT |
647 | |
648 | return 0; | |
649 | } | |
650 | ||
7801db8a | 651 | #define NR_U32_NODE (1<<12) |
1da177e4 LT |
652 | static u32 gen_new_kid(struct tc_u_hnode *ht, u32 handle) |
653 | { | |
654 | struct tc_u_knode *n; | |
7801db8a CW |
655 | unsigned long i; |
656 | unsigned long *bitmap = kzalloc(BITS_TO_LONGS(NR_U32_NODE) * sizeof(unsigned long), | |
657 | GFP_KERNEL); | |
658 | if (!bitmap) | |
659 | return handle | 0xFFF; | |
1da177e4 | 660 | |
1ce87720 JF |
661 | for (n = rtnl_dereference(ht->ht[TC_U32_HASH(handle)]); |
662 | n; | |
663 | n = rtnl_dereference(n->next)) | |
7801db8a | 664 | set_bit(TC_U32_NODE(n->handle), bitmap); |
1da177e4 | 665 | |
7801db8a CW |
666 | i = find_next_zero_bit(bitmap, NR_U32_NODE, 0x800); |
667 | if (i >= NR_U32_NODE) | |
668 | i = find_next_zero_bit(bitmap, NR_U32_NODE, 1); | |
669 | ||
670 | kfree(bitmap); | |
671 | return handle | (i >= NR_U32_NODE ? 0xFFF : i); | |
1da177e4 LT |
672 | } |
673 | ||
6fa8c014 PM |
674 | static const struct nla_policy u32_policy[TCA_U32_MAX + 1] = { |
675 | [TCA_U32_CLASSID] = { .type = NLA_U32 }, | |
676 | [TCA_U32_HASH] = { .type = NLA_U32 }, | |
677 | [TCA_U32_LINK] = { .type = NLA_U32 }, | |
678 | [TCA_U32_DIVISOR] = { .type = NLA_U32 }, | |
679 | [TCA_U32_SEL] = { .len = sizeof(struct tc_u32_sel) }, | |
680 | [TCA_U32_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ }, | |
681 | [TCA_U32_MARK] = { .len = sizeof(struct tc_u32_mark) }, | |
682 | }; | |
683 | ||
c1b52739 BL |
684 | static int u32_set_parms(struct net *net, struct tcf_proto *tp, |
685 | unsigned long base, struct tc_u_hnode *ht, | |
add93b61 | 686 | struct tc_u_knode *n, struct nlattr **tb, |
2f7ef2f8 | 687 | struct nlattr *est, bool ovr) |
1da177e4 LT |
688 | { |
689 | int err; | |
690 | struct tcf_exts e; | |
691 | ||
5da57f42 | 692 | tcf_exts_init(&e, TCA_U32_ACT, TCA_U32_POLICE); |
2f7ef2f8 | 693 | err = tcf_exts_validate(net, tp, tb, est, &e, ovr); |
1da177e4 LT |
694 | if (err < 0) |
695 | return err; | |
696 | ||
697 | err = -EINVAL; | |
add93b61 | 698 | if (tb[TCA_U32_LINK]) { |
1587bac4 | 699 | u32 handle = nla_get_u32(tb[TCA_U32_LINK]); |
47a1a1d4 | 700 | struct tc_u_hnode *ht_down = NULL, *ht_old; |
1da177e4 LT |
701 | |
702 | if (TC_U32_KEY(handle)) | |
703 | goto errout; | |
704 | ||
705 | if (handle) { | |
706 | ht_down = u32_lookup_ht(ht->tp_c, handle); | |
707 | ||
708 | if (ht_down == NULL) | |
709 | goto errout; | |
710 | ht_down->refcnt++; | |
711 | } | |
712 | ||
1ce87720 JF |
713 | ht_old = rtnl_dereference(n->ht_down); |
714 | rcu_assign_pointer(n->ht_down, ht_down); | |
1da177e4 | 715 | |
47a1a1d4 PM |
716 | if (ht_old) |
717 | ht_old->refcnt--; | |
1da177e4 | 718 | } |
add93b61 | 719 | if (tb[TCA_U32_CLASSID]) { |
1587bac4 | 720 | n->res.classid = nla_get_u32(tb[TCA_U32_CLASSID]); |
1da177e4 LT |
721 | tcf_bind_filter(tp, &n->res, base); |
722 | } | |
723 | ||
724 | #ifdef CONFIG_NET_CLS_IND | |
add93b61 | 725 | if (tb[TCA_U32_INDEV]) { |
2519a602 WC |
726 | int ret; |
727 | ret = tcf_change_indev(net, tb[TCA_U32_INDEV]); | |
728 | if (ret < 0) | |
1da177e4 | 729 | goto errout; |
2519a602 | 730 | n->ifindex = ret; |
1da177e4 LT |
731 | } |
732 | #endif | |
733 | tcf_exts_change(tp, &n->exts, &e); | |
734 | ||
735 | return 0; | |
736 | errout: | |
18d0264f | 737 | tcf_exts_destroy(&e); |
1da177e4 LT |
738 | return err; |
739 | } | |
740 | ||
de5df632 JF |
741 | static void u32_replace_knode(struct tcf_proto *tp, |
742 | struct tc_u_common *tp_c, | |
743 | struct tc_u_knode *n) | |
744 | { | |
745 | struct tc_u_knode __rcu **ins; | |
746 | struct tc_u_knode *pins; | |
747 | struct tc_u_hnode *ht; | |
748 | ||
749 | if (TC_U32_HTID(n->handle) == TC_U32_ROOT) | |
750 | ht = rtnl_dereference(tp->root); | |
751 | else | |
752 | ht = u32_lookup_ht(tp_c, TC_U32_HTID(n->handle)); | |
753 | ||
754 | ins = &ht->ht[TC_U32_HASH(n->handle)]; | |
755 | ||
756 | /* The node must always exist for it to be replaced if this is not the | |
757 | * case then something went very wrong elsewhere. | |
758 | */ | |
759 | for (pins = rtnl_dereference(*ins); ; | |
760 | ins = &pins->next, pins = rtnl_dereference(*ins)) | |
761 | if (pins->handle == n->handle) | |
762 | break; | |
763 | ||
764 | RCU_INIT_POINTER(n->next, pins->next); | |
765 | rcu_assign_pointer(*ins, n); | |
766 | } | |
767 | ||
768 | static struct tc_u_knode *u32_init_knode(struct tcf_proto *tp, | |
769 | struct tc_u_knode *n) | |
770 | { | |
771 | struct tc_u_knode *new; | |
772 | struct tc_u32_sel *s = &n->sel; | |
773 | ||
774 | new = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), | |
775 | GFP_KERNEL); | |
776 | ||
777 | if (!new) | |
778 | return NULL; | |
779 | ||
780 | RCU_INIT_POINTER(new->next, n->next); | |
781 | new->handle = n->handle; | |
782 | RCU_INIT_POINTER(new->ht_up, n->ht_up); | |
783 | ||
784 | #ifdef CONFIG_NET_CLS_IND | |
785 | new->ifindex = n->ifindex; | |
786 | #endif | |
787 | new->fshift = n->fshift; | |
788 | new->res = n->res; | |
789 | RCU_INIT_POINTER(new->ht_down, n->ht_down); | |
790 | ||
791 | /* bump reference count as long as we hold pointer to structure */ | |
792 | if (new->ht_down) | |
793 | new->ht_down->refcnt++; | |
794 | ||
795 | #ifdef CONFIG_CLS_U32_PERF | |
796 | /* Statistics may be incremented by readers during update | |
797 | * so we must keep them in tact. When the node is later destroyed | |
798 | * a special destroy call must be made to not free the pf memory. | |
799 | */ | |
800 | new->pf = n->pf; | |
801 | #endif | |
802 | ||
803 | #ifdef CONFIG_CLS_U32_MARK | |
804 | new->val = n->val; | |
805 | new->mask = n->mask; | |
806 | /* Similarly success statistics must be moved as pointers */ | |
807 | new->pcpu_success = n->pcpu_success; | |
808 | #endif | |
809 | new->tp = tp; | |
810 | memcpy(&new->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key)); | |
811 | ||
812 | tcf_exts_init(&new->exts, TCA_U32_ACT, TCA_U32_POLICE); | |
813 | ||
814 | return new; | |
815 | } | |
816 | ||
c1b52739 | 817 | static int u32_change(struct net *net, struct sk_buff *in_skb, |
af4c6641 | 818 | struct tcf_proto *tp, unsigned long base, u32 handle, |
add93b61 | 819 | struct nlattr **tca, |
2f7ef2f8 | 820 | unsigned long *arg, bool ovr) |
1da177e4 LT |
821 | { |
822 | struct tc_u_common *tp_c = tp->data; | |
823 | struct tc_u_hnode *ht; | |
824 | struct tc_u_knode *n; | |
825 | struct tc_u32_sel *s; | |
add93b61 PM |
826 | struct nlattr *opt = tca[TCA_OPTIONS]; |
827 | struct nlattr *tb[TCA_U32_MAX + 1]; | |
1da177e4 LT |
828 | u32 htid; |
829 | int err; | |
459d5f62 JF |
830 | #ifdef CONFIG_CLS_U32_PERF |
831 | size_t size; | |
832 | #endif | |
1da177e4 LT |
833 | |
834 | if (opt == NULL) | |
835 | return handle ? -EINVAL : 0; | |
836 | ||
6fa8c014 | 837 | err = nla_parse_nested(tb, TCA_U32_MAX, opt, u32_policy); |
cee63723 PM |
838 | if (err < 0) |
839 | return err; | |
1da177e4 | 840 | |
cc7ec456 ED |
841 | n = (struct tc_u_knode *)*arg; |
842 | if (n) { | |
de5df632 JF |
843 | struct tc_u_knode *new; |
844 | ||
1da177e4 LT |
845 | if (TC_U32_KEY(n->handle) == 0) |
846 | return -EINVAL; | |
847 | ||
de5df632 JF |
848 | new = u32_init_knode(tp, n); |
849 | if (!new) | |
850 | return -ENOMEM; | |
851 | ||
852 | err = u32_set_parms(net, tp, base, | |
853 | rtnl_dereference(n->ht_up), new, tb, | |
854 | tca[TCA_RATE], ovr); | |
855 | ||
856 | if (err) { | |
857 | u32_destroy_key(tp, new, false); | |
858 | return err; | |
859 | } | |
860 | ||
861 | u32_replace_knode(tp, tp_c, new); | |
a0efb80c | 862 | tcf_unbind_filter(tp, &n->res); |
de5df632 | 863 | call_rcu(&n->rcu, u32_delete_key_rcu); |
a1b7c5fd | 864 | u32_replace_hw_knode(tp, new); |
de5df632 | 865 | return 0; |
1da177e4 LT |
866 | } |
867 | ||
add93b61 | 868 | if (tb[TCA_U32_DIVISOR]) { |
cc7ec456 | 869 | unsigned int divisor = nla_get_u32(tb[TCA_U32_DIVISOR]); |
1da177e4 LT |
870 | |
871 | if (--divisor > 0x100) | |
872 | return -EINVAL; | |
873 | if (TC_U32_KEY(handle)) | |
874 | return -EINVAL; | |
875 | if (handle == 0) { | |
876 | handle = gen_new_htid(tp->data); | |
877 | if (handle == 0) | |
878 | return -ENOMEM; | |
879 | } | |
cc7ec456 | 880 | ht = kzalloc(sizeof(*ht) + divisor*sizeof(void *), GFP_KERNEL); |
1da177e4 LT |
881 | if (ht == NULL) |
882 | return -ENOBUFS; | |
1da177e4 | 883 | ht->tp_c = tp_c; |
e56cfad1 | 884 | ht->refcnt = 1; |
1da177e4 LT |
885 | ht->divisor = divisor; |
886 | ht->handle = handle; | |
887 | ht->prio = tp->prio; | |
1ce87720 JF |
888 | RCU_INIT_POINTER(ht->next, tp_c->hlist); |
889 | rcu_assign_pointer(tp_c->hlist, ht); | |
1da177e4 | 890 | *arg = (unsigned long)ht; |
a1b7c5fd JF |
891 | |
892 | u32_replace_hw_hnode(tp, ht); | |
1da177e4 LT |
893 | return 0; |
894 | } | |
895 | ||
add93b61 | 896 | if (tb[TCA_U32_HASH]) { |
1587bac4 | 897 | htid = nla_get_u32(tb[TCA_U32_HASH]); |
1da177e4 | 898 | if (TC_U32_HTID(htid) == TC_U32_ROOT) { |
1ce87720 | 899 | ht = rtnl_dereference(tp->root); |
1da177e4 LT |
900 | htid = ht->handle; |
901 | } else { | |
902 | ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid)); | |
903 | if (ht == NULL) | |
904 | return -EINVAL; | |
905 | } | |
906 | } else { | |
1ce87720 | 907 | ht = rtnl_dereference(tp->root); |
1da177e4 LT |
908 | htid = ht->handle; |
909 | } | |
910 | ||
911 | if (ht->divisor < TC_U32_HASH(htid)) | |
912 | return -EINVAL; | |
913 | ||
914 | if (handle) { | |
915 | if (TC_U32_HTID(handle) && TC_U32_HTID(handle^htid)) | |
916 | return -EINVAL; | |
917 | handle = htid | TC_U32_NODE(handle); | |
918 | } else | |
919 | handle = gen_new_kid(ht, htid); | |
920 | ||
6fa8c014 | 921 | if (tb[TCA_U32_SEL] == NULL) |
1da177e4 LT |
922 | return -EINVAL; |
923 | ||
add93b61 | 924 | s = nla_data(tb[TCA_U32_SEL]); |
1da177e4 | 925 | |
0da974f4 | 926 | n = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), GFP_KERNEL); |
1da177e4 LT |
927 | if (n == NULL) |
928 | return -ENOBUFS; | |
929 | ||
1da177e4 | 930 | #ifdef CONFIG_CLS_U32_PERF |
459d5f62 JF |
931 | size = sizeof(struct tc_u32_pcnt) + s->nkeys * sizeof(u64); |
932 | n->pf = __alloc_percpu(size, __alignof__(struct tc_u32_pcnt)); | |
933 | if (!n->pf) { | |
1da177e4 LT |
934 | kfree(n); |
935 | return -ENOBUFS; | |
936 | } | |
1da177e4 LT |
937 | #endif |
938 | ||
939 | memcpy(&n->sel, s, sizeof(*s) + s->nkeys*sizeof(struct tc_u32_key)); | |
a96366bf | 940 | RCU_INIT_POINTER(n->ht_up, ht); |
1da177e4 | 941 | n->handle = handle; |
b2268016 | 942 | n->fshift = s->hmask ? ffs(ntohl(s->hmask)) - 1 : 0; |
5da57f42 | 943 | tcf_exts_init(&n->exts, TCA_U32_ACT, TCA_U32_POLICE); |
1ce87720 | 944 | n->tp = tp; |
1da177e4 LT |
945 | |
946 | #ifdef CONFIG_CLS_U32_MARK | |
459d5f62 | 947 | n->pcpu_success = alloc_percpu(u32); |
a1ddcfee JF |
948 | if (!n->pcpu_success) { |
949 | err = -ENOMEM; | |
950 | goto errout; | |
951 | } | |
459d5f62 | 952 | |
add93b61 | 953 | if (tb[TCA_U32_MARK]) { |
1da177e4 LT |
954 | struct tc_u32_mark *mark; |
955 | ||
add93b61 | 956 | mark = nla_data(tb[TCA_U32_MARK]); |
459d5f62 JF |
957 | n->val = mark->val; |
958 | n->mask = mark->mask; | |
1da177e4 LT |
959 | } |
960 | #endif | |
961 | ||
2f7ef2f8 | 962 | err = u32_set_parms(net, tp, base, ht, n, tb, tca[TCA_RATE], ovr); |
1da177e4 | 963 | if (err == 0) { |
1ce87720 JF |
964 | struct tc_u_knode __rcu **ins; |
965 | struct tc_u_knode *pins; | |
966 | ||
967 | ins = &ht->ht[TC_U32_HASH(handle)]; | |
968 | for (pins = rtnl_dereference(*ins); pins; | |
969 | ins = &pins->next, pins = rtnl_dereference(*ins)) | |
970 | if (TC_U32_NODE(handle) < TC_U32_NODE(pins->handle)) | |
1da177e4 LT |
971 | break; |
972 | ||
1ce87720 JF |
973 | RCU_INIT_POINTER(n->next, pins); |
974 | rcu_assign_pointer(*ins, n); | |
a1b7c5fd | 975 | u32_replace_hw_knode(tp, n); |
1da177e4 LT |
976 | *arg = (unsigned long)n; |
977 | return 0; | |
978 | } | |
a1ddcfee JF |
979 | |
980 | #ifdef CONFIG_CLS_U32_MARK | |
981 | free_percpu(n->pcpu_success); | |
a2aeb02a | 982 | errout: |
a1ddcfee JF |
983 | #endif |
984 | ||
1da177e4 | 985 | #ifdef CONFIG_CLS_U32_PERF |
1ce87720 | 986 | free_percpu(n->pf); |
1da177e4 LT |
987 | #endif |
988 | kfree(n); | |
989 | return err; | |
990 | } | |
991 | ||
992 | static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg) | |
993 | { | |
994 | struct tc_u_common *tp_c = tp->data; | |
995 | struct tc_u_hnode *ht; | |
996 | struct tc_u_knode *n; | |
cc7ec456 | 997 | unsigned int h; |
1da177e4 LT |
998 | |
999 | if (arg->stop) | |
1000 | return; | |
1001 | ||
1ce87720 JF |
1002 | for (ht = rtnl_dereference(tp_c->hlist); |
1003 | ht; | |
1004 | ht = rtnl_dereference(ht->next)) { | |
1da177e4 LT |
1005 | if (ht->prio != tp->prio) |
1006 | continue; | |
1007 | if (arg->count >= arg->skip) { | |
1008 | if (arg->fn(tp, (unsigned long)ht, arg) < 0) { | |
1009 | arg->stop = 1; | |
1010 | return; | |
1011 | } | |
1012 | } | |
1013 | arg->count++; | |
1014 | for (h = 0; h <= ht->divisor; h++) { | |
1ce87720 JF |
1015 | for (n = rtnl_dereference(ht->ht[h]); |
1016 | n; | |
1017 | n = rtnl_dereference(n->next)) { | |
1da177e4 LT |
1018 | if (arg->count < arg->skip) { |
1019 | arg->count++; | |
1020 | continue; | |
1021 | } | |
1022 | if (arg->fn(tp, (unsigned long)n, arg) < 0) { | |
1023 | arg->stop = 1; | |
1024 | return; | |
1025 | } | |
1026 | arg->count++; | |
1027 | } | |
1028 | } | |
1029 | } | |
1030 | } | |
1031 | ||
832d1d5b | 1032 | static int u32_dump(struct net *net, struct tcf_proto *tp, unsigned long fh, |
1da177e4 LT |
1033 | struct sk_buff *skb, struct tcmsg *t) |
1034 | { | |
cc7ec456 | 1035 | struct tc_u_knode *n = (struct tc_u_knode *)fh; |
1ce87720 | 1036 | struct tc_u_hnode *ht_up, *ht_down; |
4b3550ef | 1037 | struct nlattr *nest; |
1da177e4 LT |
1038 | |
1039 | if (n == NULL) | |
1040 | return skb->len; | |
1041 | ||
1042 | t->tcm_handle = n->handle; | |
1043 | ||
4b3550ef PM |
1044 | nest = nla_nest_start(skb, TCA_OPTIONS); |
1045 | if (nest == NULL) | |
1046 | goto nla_put_failure; | |
1da177e4 LT |
1047 | |
1048 | if (TC_U32_KEY(n->handle) == 0) { | |
cc7ec456 ED |
1049 | struct tc_u_hnode *ht = (struct tc_u_hnode *)fh; |
1050 | u32 divisor = ht->divisor + 1; | |
1051 | ||
1b34ec43 DM |
1052 | if (nla_put_u32(skb, TCA_U32_DIVISOR, divisor)) |
1053 | goto nla_put_failure; | |
1da177e4 | 1054 | } else { |
459d5f62 JF |
1055 | #ifdef CONFIG_CLS_U32_PERF |
1056 | struct tc_u32_pcnt *gpf; | |
459d5f62 | 1057 | int cpu; |
80aab73d | 1058 | #endif |
459d5f62 | 1059 | |
1b34ec43 DM |
1060 | if (nla_put(skb, TCA_U32_SEL, |
1061 | sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key), | |
1062 | &n->sel)) | |
1063 | goto nla_put_failure; | |
1ce87720 JF |
1064 | |
1065 | ht_up = rtnl_dereference(n->ht_up); | |
1066 | if (ht_up) { | |
1da177e4 | 1067 | u32 htid = n->handle & 0xFFFFF000; |
1b34ec43 DM |
1068 | if (nla_put_u32(skb, TCA_U32_HASH, htid)) |
1069 | goto nla_put_failure; | |
1da177e4 | 1070 | } |
1b34ec43 DM |
1071 | if (n->res.classid && |
1072 | nla_put_u32(skb, TCA_U32_CLASSID, n->res.classid)) | |
1073 | goto nla_put_failure; | |
1ce87720 JF |
1074 | |
1075 | ht_down = rtnl_dereference(n->ht_down); | |
1076 | if (ht_down && | |
1077 | nla_put_u32(skb, TCA_U32_LINK, ht_down->handle)) | |
1b34ec43 | 1078 | goto nla_put_failure; |
1da177e4 LT |
1079 | |
1080 | #ifdef CONFIG_CLS_U32_MARK | |
459d5f62 JF |
1081 | if ((n->val || n->mask)) { |
1082 | struct tc_u32_mark mark = {.val = n->val, | |
1083 | .mask = n->mask, | |
1084 | .success = 0}; | |
80aab73d | 1085 | int cpum; |
459d5f62 | 1086 | |
80aab73d JF |
1087 | for_each_possible_cpu(cpum) { |
1088 | __u32 cnt = *per_cpu_ptr(n->pcpu_success, cpum); | |
459d5f62 JF |
1089 | |
1090 | mark.success += cnt; | |
1091 | } | |
1092 | ||
1093 | if (nla_put(skb, TCA_U32_MARK, sizeof(mark), &mark)) | |
1094 | goto nla_put_failure; | |
1095 | } | |
1da177e4 LT |
1096 | #endif |
1097 | ||
5da57f42 | 1098 | if (tcf_exts_dump(skb, &n->exts) < 0) |
add93b61 | 1099 | goto nla_put_failure; |
1da177e4 LT |
1100 | |
1101 | #ifdef CONFIG_NET_CLS_IND | |
2519a602 WC |
1102 | if (n->ifindex) { |
1103 | struct net_device *dev; | |
1104 | dev = __dev_get_by_index(net, n->ifindex); | |
1105 | if (dev && nla_put_string(skb, TCA_U32_INDEV, dev->name)) | |
1106 | goto nla_put_failure; | |
1107 | } | |
1da177e4 LT |
1108 | #endif |
1109 | #ifdef CONFIG_CLS_U32_PERF | |
459d5f62 JF |
1110 | gpf = kzalloc(sizeof(struct tc_u32_pcnt) + |
1111 | n->sel.nkeys * sizeof(u64), | |
1112 | GFP_KERNEL); | |
1113 | if (!gpf) | |
1114 | goto nla_put_failure; | |
1115 | ||
1116 | for_each_possible_cpu(cpu) { | |
1117 | int i; | |
1118 | struct tc_u32_pcnt *pf = per_cpu_ptr(n->pf, cpu); | |
1119 | ||
1120 | gpf->rcnt += pf->rcnt; | |
1121 | gpf->rhit += pf->rhit; | |
1122 | for (i = 0; i < n->sel.nkeys; i++) | |
1123 | gpf->kcnts[i] += pf->kcnts[i]; | |
1124 | } | |
1125 | ||
1b34ec43 DM |
1126 | if (nla_put(skb, TCA_U32_PCNT, |
1127 | sizeof(struct tc_u32_pcnt) + n->sel.nkeys*sizeof(u64), | |
459d5f62 JF |
1128 | gpf)) { |
1129 | kfree(gpf); | |
1b34ec43 | 1130 | goto nla_put_failure; |
459d5f62 JF |
1131 | } |
1132 | kfree(gpf); | |
1da177e4 LT |
1133 | #endif |
1134 | } | |
1135 | ||
4b3550ef PM |
1136 | nla_nest_end(skb, nest); |
1137 | ||
1da177e4 | 1138 | if (TC_U32_KEY(n->handle)) |
5da57f42 | 1139 | if (tcf_exts_dump_stats(skb, &n->exts) < 0) |
add93b61 | 1140 | goto nla_put_failure; |
1da177e4 LT |
1141 | return skb->len; |
1142 | ||
add93b61 | 1143 | nla_put_failure: |
4b3550ef | 1144 | nla_nest_cancel(skb, nest); |
1da177e4 LT |
1145 | return -1; |
1146 | } | |
1147 | ||
2eb9d75c | 1148 | static struct tcf_proto_ops cls_u32_ops __read_mostly = { |
1da177e4 LT |
1149 | .kind = "u32", |
1150 | .classify = u32_classify, | |
1151 | .init = u32_init, | |
1152 | .destroy = u32_destroy, | |
1153 | .get = u32_get, | |
1da177e4 LT |
1154 | .change = u32_change, |
1155 | .delete = u32_delete, | |
1156 | .walk = u32_walk, | |
1157 | .dump = u32_dump, | |
1158 | .owner = THIS_MODULE, | |
1159 | }; | |
1160 | ||
1161 | static int __init init_u32(void) | |
1162 | { | |
6ff9c364 | 1163 | pr_info("u32 classifier\n"); |
1da177e4 | 1164 | #ifdef CONFIG_CLS_U32_PERF |
6ff9c364 | 1165 | pr_info(" Performance counters on\n"); |
1da177e4 | 1166 | #endif |
1da177e4 | 1167 | #ifdef CONFIG_NET_CLS_IND |
6ff9c364 | 1168 | pr_info(" input device check on\n"); |
1da177e4 LT |
1169 | #endif |
1170 | #ifdef CONFIG_NET_CLS_ACT | |
6ff9c364 | 1171 | pr_info(" Actions configured\n"); |
1da177e4 LT |
1172 | #endif |
1173 | return register_tcf_proto_ops(&cls_u32_ops); | |
1174 | } | |
1175 | ||
10297b99 | 1176 | static void __exit exit_u32(void) |
1da177e4 LT |
1177 | { |
1178 | unregister_tcf_proto_ops(&cls_u32_ops); | |
1179 | } | |
1180 | ||
1181 | module_init(init_u32) | |
1182 | module_exit(exit_u32) | |
1183 | MODULE_LICENSE("GPL"); |