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> |
3cd904ec WC |
43 | #include <linux/netdevice.h> |
44 | #include <linux/hash.h> | |
0ba48053 | 45 | #include <net/netlink.h> |
1da177e4 LT |
46 | #include <net/act_api.h> |
47 | #include <net/pkt_cls.h> | |
e7614370 | 48 | #include <linux/idr.h> |
1da177e4 | 49 | |
cc7ec456 | 50 | struct tc_u_knode { |
1ce87720 | 51 | struct tc_u_knode __rcu *next; |
1da177e4 | 52 | u32 handle; |
1ce87720 | 53 | struct tc_u_hnode __rcu *ht_up; |
1da177e4 LT |
54 | struct tcf_exts exts; |
55 | #ifdef CONFIG_NET_CLS_IND | |
2519a602 | 56 | int ifindex; |
1da177e4 LT |
57 | #endif |
58 | u8 fshift; | |
59 | struct tcf_result res; | |
1ce87720 | 60 | struct tc_u_hnode __rcu *ht_down; |
1da177e4 | 61 | #ifdef CONFIG_CLS_U32_PERF |
459d5f62 | 62 | struct tc_u32_pcnt __percpu *pf; |
1da177e4 | 63 | #endif |
9e8ce79c | 64 | u32 flags; |
530d9951 | 65 | unsigned int in_hw_count; |
1da177e4 | 66 | #ifdef CONFIG_CLS_U32_MARK |
459d5f62 JF |
67 | u32 val; |
68 | u32 mask; | |
69 | u32 __percpu *pcpu_success; | |
1da177e4 | 70 | #endif |
aaa908ff | 71 | struct rcu_work rwork; |
4e2840ee JF |
72 | /* The 'sel' field MUST be the last field in structure to allow for |
73 | * tc_u32_keys allocated at end of structure. | |
74 | */ | |
75 | struct tc_u32_sel sel; | |
1da177e4 LT |
76 | }; |
77 | ||
cc7ec456 | 78 | struct tc_u_hnode { |
1ce87720 | 79 | struct tc_u_hnode __rcu *next; |
1da177e4 LT |
80 | u32 handle; |
81 | u32 prio; | |
1da177e4 | 82 | int refcnt; |
cc7ec456 | 83 | unsigned int divisor; |
e7614370 | 84 | struct idr handle_idr; |
b44ef845 | 85 | bool is_root; |
1ce87720 | 86 | struct rcu_head rcu; |
f40fe58d | 87 | u32 flags; |
5778d39d WC |
88 | /* The 'ht' field MUST be the last field in structure to allow for |
89 | * more entries allocated at end of structure. | |
90 | */ | |
91 | struct tc_u_knode __rcu *ht[1]; | |
1da177e4 LT |
92 | }; |
93 | ||
cc7ec456 | 94 | struct tc_u_common { |
1ce87720 | 95 | struct tc_u_hnode __rcu *hlist; |
339c21d7 | 96 | void *ptr; |
1da177e4 | 97 | int refcnt; |
e7614370 | 98 | struct idr handle_idr; |
3cd904ec | 99 | struct hlist_node hnode; |
b245d32c | 100 | long knodes; |
1da177e4 LT |
101 | }; |
102 | ||
cc7ec456 ED |
103 | static inline unsigned int u32_hash_fold(__be32 key, |
104 | const struct tc_u32_sel *sel, | |
105 | u8 fshift) | |
1da177e4 | 106 | { |
cc7ec456 | 107 | unsigned int h = ntohl(key & sel->hmask) >> fshift; |
1da177e4 LT |
108 | |
109 | return h; | |
110 | } | |
111 | ||
5a7a5555 JHS |
112 | static int u32_classify(struct sk_buff *skb, const struct tcf_proto *tp, |
113 | struct tcf_result *res) | |
1da177e4 LT |
114 | { |
115 | struct { | |
116 | struct tc_u_knode *knode; | |
fbc2e7d9 | 117 | unsigned int off; |
1da177e4 LT |
118 | } stack[TC_U32_MAXDEPTH]; |
119 | ||
1ce87720 | 120 | struct tc_u_hnode *ht = rcu_dereference_bh(tp->root); |
fbc2e7d9 | 121 | unsigned int off = skb_network_offset(skb); |
1da177e4 LT |
122 | struct tc_u_knode *n; |
123 | int sdepth = 0; | |
124 | int off2 = 0; | |
125 | int sel = 0; | |
126 | #ifdef CONFIG_CLS_U32_PERF | |
127 | int j; | |
128 | #endif | |
129 | int i, r; | |
130 | ||
131 | next_ht: | |
1ce87720 | 132 | n = rcu_dereference_bh(ht->ht[sel]); |
1da177e4 LT |
133 | |
134 | next_knode: | |
135 | if (n) { | |
136 | struct tc_u32_key *key = n->sel.keys; | |
137 | ||
138 | #ifdef CONFIG_CLS_U32_PERF | |
459d5f62 | 139 | __this_cpu_inc(n->pf->rcnt); |
1da177e4 LT |
140 | j = 0; |
141 | #endif | |
142 | ||
d34e3e18 SS |
143 | if (tc_skip_sw(n->flags)) { |
144 | n = rcu_dereference_bh(n->next); | |
145 | goto next_knode; | |
146 | } | |
147 | ||
1da177e4 | 148 | #ifdef CONFIG_CLS_U32_MARK |
459d5f62 | 149 | if ((skb->mark & n->mask) != n->val) { |
1ce87720 | 150 | n = rcu_dereference_bh(n->next); |
1da177e4 LT |
151 | goto next_knode; |
152 | } else { | |
459d5f62 | 153 | __this_cpu_inc(*n->pcpu_success); |
1da177e4 LT |
154 | } |
155 | #endif | |
156 | ||
cc7ec456 | 157 | for (i = n->sel.nkeys; i > 0; i--, key++) { |
66d50d25 | 158 | int toff = off + key->off + (off2 & key->offmask); |
86fce3ba | 159 | __be32 *data, hdata; |
fbc2e7d9 | 160 | |
4e18b3ed | 161 | if (skb_headroom(skb) + toff > INT_MAX) |
66d50d25 | 162 | goto out; |
163 | ||
86fce3ba | 164 | data = skb_header_pointer(skb, toff, 4, &hdata); |
fbc2e7d9 CG |
165 | if (!data) |
166 | goto out; | |
167 | if ((*data ^ key->val) & key->mask) { | |
1ce87720 | 168 | n = rcu_dereference_bh(n->next); |
1da177e4 LT |
169 | goto next_knode; |
170 | } | |
171 | #ifdef CONFIG_CLS_U32_PERF | |
459d5f62 | 172 | __this_cpu_inc(n->pf->kcnts[j]); |
1da177e4 LT |
173 | j++; |
174 | #endif | |
175 | } | |
1ce87720 JF |
176 | |
177 | ht = rcu_dereference_bh(n->ht_down); | |
178 | if (!ht) { | |
1da177e4 | 179 | check_terminal: |
cc7ec456 | 180 | if (n->sel.flags & TC_U32_TERMINAL) { |
1da177e4 LT |
181 | |
182 | *res = n->res; | |
183 | #ifdef CONFIG_NET_CLS_IND | |
2519a602 | 184 | if (!tcf_match_indev(skb, n->ifindex)) { |
1ce87720 | 185 | n = rcu_dereference_bh(n->next); |
1da177e4 LT |
186 | goto next_knode; |
187 | } | |
188 | #endif | |
189 | #ifdef CONFIG_CLS_U32_PERF | |
459d5f62 | 190 | __this_cpu_inc(n->pf->rhit); |
1da177e4 LT |
191 | #endif |
192 | r = tcf_exts_exec(skb, &n->exts, res); | |
193 | if (r < 0) { | |
1ce87720 | 194 | n = rcu_dereference_bh(n->next); |
1da177e4 LT |
195 | goto next_knode; |
196 | } | |
197 | ||
198 | return r; | |
199 | } | |
1ce87720 | 200 | n = rcu_dereference_bh(n->next); |
1da177e4 LT |
201 | goto next_knode; |
202 | } | |
203 | ||
204 | /* PUSH */ | |
205 | if (sdepth >= TC_U32_MAXDEPTH) | |
206 | goto deadloop; | |
207 | stack[sdepth].knode = n; | |
fbc2e7d9 | 208 | stack[sdepth].off = off; |
1da177e4 LT |
209 | sdepth++; |
210 | ||
1ce87720 | 211 | ht = rcu_dereference_bh(n->ht_down); |
1da177e4 | 212 | sel = 0; |
fbc2e7d9 | 213 | if (ht->divisor) { |
86fce3ba | 214 | __be32 *data, hdata; |
fbc2e7d9 CG |
215 | |
216 | data = skb_header_pointer(skb, off + n->sel.hoff, 4, | |
86fce3ba | 217 | &hdata); |
fbc2e7d9 CG |
218 | if (!data) |
219 | goto out; | |
220 | sel = ht->divisor & u32_hash_fold(*data, &n->sel, | |
221 | n->fshift); | |
222 | } | |
cc7ec456 | 223 | if (!(n->sel.flags & (TC_U32_VAROFFSET | TC_U32_OFFSET | TC_U32_EAT))) |
1da177e4 LT |
224 | goto next_ht; |
225 | ||
cc7ec456 | 226 | if (n->sel.flags & (TC_U32_OFFSET | TC_U32_VAROFFSET)) { |
1da177e4 | 227 | off2 = n->sel.off + 3; |
fbc2e7d9 | 228 | if (n->sel.flags & TC_U32_VAROFFSET) { |
86fce3ba | 229 | __be16 *data, hdata; |
fbc2e7d9 CG |
230 | |
231 | data = skb_header_pointer(skb, | |
232 | off + n->sel.offoff, | |
86fce3ba | 233 | 2, &hdata); |
fbc2e7d9 CG |
234 | if (!data) |
235 | goto out; | |
236 | off2 += ntohs(n->sel.offmask & *data) >> | |
237 | n->sel.offshift; | |
238 | } | |
1da177e4 LT |
239 | off2 &= ~3; |
240 | } | |
cc7ec456 | 241 | if (n->sel.flags & TC_U32_EAT) { |
fbc2e7d9 | 242 | off += off2; |
1da177e4 LT |
243 | off2 = 0; |
244 | } | |
245 | ||
fbc2e7d9 | 246 | if (off < skb->len) |
1da177e4 LT |
247 | goto next_ht; |
248 | } | |
249 | ||
250 | /* POP */ | |
251 | if (sdepth--) { | |
252 | n = stack[sdepth].knode; | |
1ce87720 | 253 | ht = rcu_dereference_bh(n->ht_up); |
fbc2e7d9 | 254 | off = stack[sdepth].off; |
1da177e4 LT |
255 | goto check_terminal; |
256 | } | |
fbc2e7d9 | 257 | out: |
1da177e4 LT |
258 | return -1; |
259 | ||
260 | deadloop: | |
e87cc472 | 261 | net_warn_ratelimited("cls_u32: dead loop\n"); |
1da177e4 LT |
262 | return -1; |
263 | } | |
264 | ||
5a7a5555 | 265 | static struct tc_u_hnode *u32_lookup_ht(struct tc_u_common *tp_c, u32 handle) |
1da177e4 LT |
266 | { |
267 | struct tc_u_hnode *ht; | |
268 | ||
1ce87720 JF |
269 | for (ht = rtnl_dereference(tp_c->hlist); |
270 | ht; | |
271 | ht = rtnl_dereference(ht->next)) | |
1da177e4 LT |
272 | if (ht->handle == handle) |
273 | break; | |
274 | ||
275 | return ht; | |
276 | } | |
277 | ||
5a7a5555 | 278 | static struct tc_u_knode *u32_lookup_key(struct tc_u_hnode *ht, u32 handle) |
1da177e4 | 279 | { |
cc7ec456 | 280 | unsigned int sel; |
1da177e4 LT |
281 | struct tc_u_knode *n = NULL; |
282 | ||
283 | sel = TC_U32_HASH(handle); | |
284 | if (sel > ht->divisor) | |
285 | goto out; | |
286 | ||
1ce87720 JF |
287 | for (n = rtnl_dereference(ht->ht[sel]); |
288 | n; | |
289 | n = rtnl_dereference(n->next)) | |
1da177e4 LT |
290 | if (n->handle == handle) |
291 | break; | |
292 | out: | |
293 | return n; | |
294 | } | |
295 | ||
296 | ||
8113c095 | 297 | static void *u32_get(struct tcf_proto *tp, u32 handle) |
1da177e4 LT |
298 | { |
299 | struct tc_u_hnode *ht; | |
300 | struct tc_u_common *tp_c = tp->data; | |
301 | ||
302 | if (TC_U32_HTID(handle) == TC_U32_ROOT) | |
1ce87720 | 303 | ht = rtnl_dereference(tp->root); |
1da177e4 LT |
304 | else |
305 | ht = u32_lookup_ht(tp_c, TC_U32_HTID(handle)); | |
306 | ||
307 | if (!ht) | |
8113c095 | 308 | return NULL; |
1da177e4 LT |
309 | |
310 | if (TC_U32_KEY(handle) == 0) | |
8113c095 | 311 | return ht; |
1da177e4 | 312 | |
8113c095 | 313 | return u32_lookup_key(ht, handle); |
1da177e4 LT |
314 | } |
315 | ||
ffdc2d9e | 316 | /* Protected by rtnl lock */ |
e7614370 | 317 | static u32 gen_new_htid(struct tc_u_common *tp_c, struct tc_u_hnode *ptr) |
1da177e4 | 318 | { |
ffdc2d9e MW |
319 | int id = idr_alloc_cyclic(&tp_c->handle_idr, ptr, 1, 0x7FF, GFP_KERNEL); |
320 | if (id < 0) | |
e7614370 | 321 | return 0; |
ffdc2d9e | 322 | return (id | 0x800U) << 20; |
1da177e4 LT |
323 | } |
324 | ||
3cd904ec WC |
325 | static struct hlist_head *tc_u_common_hash; |
326 | ||
327 | #define U32_HASH_SHIFT 10 | |
328 | #define U32_HASH_SIZE (1 << U32_HASH_SHIFT) | |
329 | ||
339c21d7 JP |
330 | static void *tc_u_common_ptr(const struct tcf_proto *tp) |
331 | { | |
332 | struct tcf_block *block = tp->chain->block; | |
333 | ||
334 | /* The block sharing is currently supported only | |
335 | * for classless qdiscs. In that case we use block | |
336 | * for tc_u_common identification. In case the | |
337 | * block is not shared, block->q is a valid pointer | |
338 | * and we can use that. That works for classful qdiscs. | |
339 | */ | |
340 | if (tcf_block_shared(block)) | |
341 | return block; | |
342 | else | |
343 | return block->q; | |
344 | } | |
345 | ||
4895c42f | 346 | static struct hlist_head *tc_u_hash(void *key) |
3cd904ec | 347 | { |
4895c42f | 348 | return tc_u_common_hash + hash_ptr(key, U32_HASH_SHIFT); |
3cd904ec WC |
349 | } |
350 | ||
4895c42f | 351 | static struct tc_u_common *tc_u_common_find(void *key) |
3cd904ec WC |
352 | { |
353 | struct tc_u_common *tc; | |
4895c42f AV |
354 | hlist_for_each_entry(tc, tc_u_hash(key), hnode) { |
355 | if (tc->ptr == key) | |
3cd904ec WC |
356 | return tc; |
357 | } | |
358 | return NULL; | |
359 | } | |
360 | ||
1da177e4 LT |
361 | static int u32_init(struct tcf_proto *tp) |
362 | { | |
363 | struct tc_u_hnode *root_ht; | |
4895c42f AV |
364 | void *key = tc_u_common_ptr(tp); |
365 | struct tc_u_common *tp_c = tc_u_common_find(key); | |
1da177e4 | 366 | |
0da974f4 | 367 | root_ht = kzalloc(sizeof(*root_ht), GFP_KERNEL); |
1da177e4 LT |
368 | if (root_ht == NULL) |
369 | return -ENOBUFS; | |
370 | ||
1da177e4 | 371 | root_ht->refcnt++; |
e7614370 | 372 | root_ht->handle = tp_c ? gen_new_htid(tp_c, root_ht) : 0x80000000; |
1da177e4 | 373 | root_ht->prio = tp->prio; |
b44ef845 | 374 | root_ht->is_root = true; |
e7614370 | 375 | idr_init(&root_ht->handle_idr); |
1da177e4 LT |
376 | |
377 | if (tp_c == NULL) { | |
0da974f4 | 378 | tp_c = kzalloc(sizeof(*tp_c), GFP_KERNEL); |
1da177e4 LT |
379 | if (tp_c == NULL) { |
380 | kfree(root_ht); | |
381 | return -ENOBUFS; | |
382 | } | |
4895c42f | 383 | tp_c->ptr = key; |
3cd904ec | 384 | INIT_HLIST_NODE(&tp_c->hnode); |
e7614370 | 385 | idr_init(&tp_c->handle_idr); |
3cd904ec | 386 | |
4895c42f | 387 | hlist_add_head(&tp_c->hnode, tc_u_hash(key)); |
1da177e4 LT |
388 | } |
389 | ||
390 | tp_c->refcnt++; | |
1ce87720 JF |
391 | RCU_INIT_POINTER(root_ht->next, tp_c->hlist); |
392 | rcu_assign_pointer(tp_c->hlist, root_ht); | |
1da177e4 | 393 | |
6d4c4077 | 394 | root_ht->refcnt++; |
1ce87720 | 395 | rcu_assign_pointer(tp->root, root_ht); |
1da177e4 LT |
396 | tp->data = tp_c; |
397 | return 0; | |
398 | } | |
399 | ||
dc07c573 | 400 | static int u32_destroy_key(struct tc_u_knode *n, bool free_pf) |
1da177e4 | 401 | { |
d7cdee5e PA |
402 | struct tc_u_hnode *ht = rtnl_dereference(n->ht_down); |
403 | ||
18d0264f | 404 | tcf_exts_destroy(&n->exts); |
35c55fc1 | 405 | tcf_exts_put_net(&n->exts); |
d7cdee5e PA |
406 | if (ht && --ht->refcnt == 0) |
407 | kfree(ht); | |
1da177e4 | 408 | #ifdef CONFIG_CLS_U32_PERF |
de5df632 JF |
409 | if (free_pf) |
410 | free_percpu(n->pf); | |
a1ddcfee JF |
411 | #endif |
412 | #ifdef CONFIG_CLS_U32_MARK | |
de5df632 JF |
413 | if (free_pf) |
414 | free_percpu(n->pcpu_success); | |
1da177e4 LT |
415 | #endif |
416 | kfree(n); | |
417 | return 0; | |
418 | } | |
419 | ||
de5df632 JF |
420 | /* u32_delete_key_rcu should be called when free'ing a copied |
421 | * version of a tc_u_knode obtained from u32_init_knode(). When | |
422 | * copies are obtained from u32_init_knode() the statistics are | |
423 | * shared between the old and new copies to allow readers to | |
424 | * continue to update the statistics during the copy. To support | |
425 | * this the u32_delete_key_rcu variant does not free the percpu | |
426 | * statistics. | |
427 | */ | |
c0d378ef CW |
428 | static void u32_delete_key_work(struct work_struct *work) |
429 | { | |
aaa908ff CW |
430 | struct tc_u_knode *key = container_of(to_rcu_work(work), |
431 | struct tc_u_knode, | |
432 | rwork); | |
c0d378ef | 433 | rtnl_lock(); |
dc07c573 | 434 | u32_destroy_key(key, false); |
c0d378ef CW |
435 | rtnl_unlock(); |
436 | } | |
437 | ||
de5df632 JF |
438 | /* u32_delete_key_freepf_rcu is the rcu callback variant |
439 | * that free's the entire structure including the statistics | |
440 | * percpu variables. Only use this if the key is not a copy | |
441 | * returned by u32_init_knode(). See u32_delete_key_rcu() | |
442 | * for the variant that should be used with keys return from | |
443 | * u32_init_knode() | |
444 | */ | |
c0d378ef CW |
445 | static void u32_delete_key_freepf_work(struct work_struct *work) |
446 | { | |
aaa908ff CW |
447 | struct tc_u_knode *key = container_of(to_rcu_work(work), |
448 | struct tc_u_knode, | |
449 | rwork); | |
c0d378ef | 450 | rtnl_lock(); |
dc07c573 | 451 | u32_destroy_key(key, true); |
c0d378ef CW |
452 | rtnl_unlock(); |
453 | } | |
454 | ||
82d567c2 | 455 | static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode *key) |
1da177e4 | 456 | { |
b245d32c | 457 | struct tc_u_common *tp_c = tp->data; |
1ce87720 JF |
458 | struct tc_u_knode __rcu **kp; |
459 | struct tc_u_knode *pkp; | |
a96366bf | 460 | struct tc_u_hnode *ht = rtnl_dereference(key->ht_up); |
1da177e4 LT |
461 | |
462 | if (ht) { | |
1ce87720 JF |
463 | kp = &ht->ht[TC_U32_HASH(key->handle)]; |
464 | for (pkp = rtnl_dereference(*kp); pkp; | |
465 | kp = &pkp->next, pkp = rtnl_dereference(*kp)) { | |
466 | if (pkp == key) { | |
467 | RCU_INIT_POINTER(*kp, key->next); | |
b245d32c | 468 | tp_c->knodes--; |
1da177e4 | 469 | |
a0efb80c | 470 | tcf_unbind_filter(tp, &key->res); |
f12c6432 | 471 | idr_remove(&ht->handle_idr, key->handle); |
35c55fc1 | 472 | tcf_exts_get_net(&key->exts); |
aaa908ff | 473 | tcf_queue_work(&key->rwork, u32_delete_key_freepf_work); |
1da177e4 LT |
474 | return 0; |
475 | } | |
476 | } | |
477 | } | |
547b792c | 478 | WARN_ON(1); |
1da177e4 LT |
479 | return 0; |
480 | } | |
481 | ||
458e704d JK |
482 | static void u32_clear_hw_hnode(struct tcf_proto *tp, struct tc_u_hnode *h, |
483 | struct netlink_ext_ack *extack) | |
a1b7c5fd | 484 | { |
245dc512 | 485 | struct tcf_block *block = tp->chain->block; |
de4784ca | 486 | struct tc_cls_u32_offload cls_u32 = {}; |
a1b7c5fd | 487 | |
88c44a52 PJV |
488 | tc_cls_common_offload_init(&cls_u32.common, tp, h->flags, block, |
489 | extack); | |
77460411 JP |
490 | cls_u32.command = TC_CLSU32_DELETE_HNODE; |
491 | cls_u32.hnode.divisor = h->divisor; | |
492 | cls_u32.hnode.handle = h->handle; | |
493 | cls_u32.hnode.prio = h->prio; | |
de4784ca | 494 | |
aeb3fecd | 495 | tc_setup_cb_call(block, TC_SETUP_CLSU32, &cls_u32, false); |
a1b7c5fd JF |
496 | } |
497 | ||
5a7a5555 | 498 | static int u32_replace_hw_hnode(struct tcf_proto *tp, struct tc_u_hnode *h, |
10a47e0f | 499 | u32 flags, struct netlink_ext_ack *extack) |
a1b7c5fd | 500 | { |
245dc512 | 501 | struct tcf_block *block = tp->chain->block; |
de4784ca | 502 | struct tc_cls_u32_offload cls_u32 = {}; |
245dc512 JP |
503 | bool skip_sw = tc_skip_sw(flags); |
504 | bool offloaded = false; | |
d34e3e18 | 505 | int err; |
a1b7c5fd | 506 | |
88c44a52 | 507 | tc_cls_common_offload_init(&cls_u32.common, tp, flags, block, extack); |
de4784ca JP |
508 | cls_u32.command = TC_CLSU32_NEW_HNODE; |
509 | cls_u32.hnode.divisor = h->divisor; | |
510 | cls_u32.hnode.handle = h->handle; | |
511 | cls_u32.hnode.prio = h->prio; | |
a1b7c5fd | 512 | |
aeb3fecd | 513 | err = tc_setup_cb_call(block, TC_SETUP_CLSU32, &cls_u32, skip_sw); |
245dc512 | 514 | if (err < 0) { |
458e704d | 515 | u32_clear_hw_hnode(tp, h, NULL); |
d47a0f38 | 516 | return err; |
245dc512 JP |
517 | } else if (err > 0) { |
518 | offloaded = true; | |
519 | } | |
520 | ||
521 | if (skip_sw && !offloaded) | |
522 | return -EINVAL; | |
d34e3e18 SS |
523 | |
524 | return 0; | |
a1b7c5fd JF |
525 | } |
526 | ||
458e704d JK |
527 | static void u32_remove_hw_knode(struct tcf_proto *tp, struct tc_u_knode *n, |
528 | struct netlink_ext_ack *extack) | |
a1b7c5fd | 529 | { |
245dc512 | 530 | struct tcf_block *block = tp->chain->block; |
de4784ca | 531 | struct tc_cls_u32_offload cls_u32 = {}; |
a1b7c5fd | 532 | |
88c44a52 PJV |
533 | tc_cls_common_offload_init(&cls_u32.common, tp, n->flags, block, |
534 | extack); | |
77460411 | 535 | cls_u32.command = TC_CLSU32_DELETE_KNODE; |
caa72601 | 536 | cls_u32.knode.handle = n->handle; |
a1b7c5fd | 537 | |
aeb3fecd | 538 | tc_setup_cb_call(block, TC_SETUP_CLSU32, &cls_u32, false); |
caa72601 | 539 | tcf_block_offload_dec(block, &n->flags); |
a1b7c5fd JF |
540 | } |
541 | ||
5a7a5555 | 542 | static int u32_replace_hw_knode(struct tcf_proto *tp, struct tc_u_knode *n, |
10a47e0f | 543 | u32 flags, struct netlink_ext_ack *extack) |
a1b7c5fd | 544 | { |
058a6c03 | 545 | struct tc_u_hnode *ht = rtnl_dereference(n->ht_down); |
245dc512 | 546 | struct tcf_block *block = tp->chain->block; |
de4784ca | 547 | struct tc_cls_u32_offload cls_u32 = {}; |
245dc512 | 548 | bool skip_sw = tc_skip_sw(flags); |
d34e3e18 | 549 | int err; |
a1b7c5fd | 550 | |
88c44a52 | 551 | tc_cls_common_offload_init(&cls_u32.common, tp, flags, block, extack); |
de4784ca JP |
552 | cls_u32.command = TC_CLSU32_REPLACE_KNODE; |
553 | cls_u32.knode.handle = n->handle; | |
554 | cls_u32.knode.fshift = n->fshift; | |
a1b7c5fd | 555 | #ifdef CONFIG_CLS_U32_MARK |
de4784ca JP |
556 | cls_u32.knode.val = n->val; |
557 | cls_u32.knode.mask = n->mask; | |
a1b7c5fd | 558 | #else |
de4784ca JP |
559 | cls_u32.knode.val = 0; |
560 | cls_u32.knode.mask = 0; | |
a1b7c5fd | 561 | #endif |
de4784ca | 562 | cls_u32.knode.sel = &n->sel; |
068ceb35 | 563 | cls_u32.knode.res = &n->res; |
de4784ca | 564 | cls_u32.knode.exts = &n->exts; |
201c44bd | 565 | if (n->ht_down) |
058a6c03 | 566 | cls_u32.knode.link_handle = ht->handle; |
201c44bd | 567 | |
aeb3fecd | 568 | err = tc_setup_cb_call(block, TC_SETUP_CLSU32, &cls_u32, skip_sw); |
245dc512 | 569 | if (err < 0) { |
458e704d | 570 | u32_remove_hw_knode(tp, n, NULL); |
201c44bd | 571 | return err; |
245dc512 | 572 | } else if (err > 0) { |
530d9951 | 573 | n->in_hw_count = err; |
caa72601 | 574 | tcf_block_offload_inc(block, &n->flags); |
245dc512 JP |
575 | } |
576 | ||
0f04d057 | 577 | if (skip_sw && !(n->flags & TCA_CLS_FLAGS_IN_HW)) |
245dc512 | 578 | return -EINVAL; |
d34e3e18 SS |
579 | |
580 | return 0; | |
a1b7c5fd JF |
581 | } |
582 | ||
458e704d JK |
583 | static void u32_clear_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht, |
584 | struct netlink_ext_ack *extack) | |
1da177e4 | 585 | { |
b245d32c | 586 | struct tc_u_common *tp_c = tp->data; |
1da177e4 | 587 | struct tc_u_knode *n; |
cc7ec456 | 588 | unsigned int h; |
1da177e4 | 589 | |
cc7ec456 | 590 | for (h = 0; h <= ht->divisor; h++) { |
1ce87720 JF |
591 | while ((n = rtnl_dereference(ht->ht[h])) != NULL) { |
592 | RCU_INIT_POINTER(ht->ht[h], | |
593 | rtnl_dereference(n->next)); | |
b245d32c | 594 | tp_c->knodes--; |
a0efb80c | 595 | tcf_unbind_filter(tp, &n->res); |
458e704d | 596 | u32_remove_hw_knode(tp, n, extack); |
9c160941 | 597 | idr_remove(&ht->handle_idr, n->handle); |
35c55fc1 | 598 | if (tcf_exts_get_net(&n->exts)) |
aaa908ff | 599 | tcf_queue_work(&n->rwork, u32_delete_key_freepf_work); |
35c55fc1 | 600 | else |
dc07c573 | 601 | u32_destroy_key(n, true); |
1da177e4 LT |
602 | } |
603 | } | |
604 | } | |
605 | ||
458e704d JK |
606 | static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht, |
607 | struct netlink_ext_ack *extack) | |
1da177e4 LT |
608 | { |
609 | struct tc_u_common *tp_c = tp->data; | |
1ce87720 JF |
610 | struct tc_u_hnode __rcu **hn; |
611 | struct tc_u_hnode *phn; | |
1da177e4 | 612 | |
6d4c4077 | 613 | WARN_ON(--ht->refcnt); |
1da177e4 | 614 | |
458e704d | 615 | u32_clear_hnode(tp, ht, extack); |
1da177e4 | 616 | |
1ce87720 JF |
617 | hn = &tp_c->hlist; |
618 | for (phn = rtnl_dereference(*hn); | |
619 | phn; | |
620 | hn = &phn->next, phn = rtnl_dereference(*hn)) { | |
621 | if (phn == ht) { | |
458e704d | 622 | u32_clear_hw_hnode(tp, ht, extack); |
e7614370 | 623 | idr_destroy(&ht->handle_idr); |
9c160941 | 624 | idr_remove(&tp_c->handle_idr, ht->handle); |
1ce87720 JF |
625 | RCU_INIT_POINTER(*hn, ht->next); |
626 | kfree_rcu(ht, rcu); | |
1da177e4 LT |
627 | return 0; |
628 | } | |
629 | } | |
630 | ||
1da177e4 LT |
631 | return -ENOENT; |
632 | } | |
633 | ||
12db03b6 VB |
634 | static void u32_destroy(struct tcf_proto *tp, bool rtnl_held, |
635 | struct netlink_ext_ack *extack) | |
1da177e4 LT |
636 | { |
637 | struct tc_u_common *tp_c = tp->data; | |
1ce87720 | 638 | struct tc_u_hnode *root_ht = rtnl_dereference(tp->root); |
1da177e4 | 639 | |
547b792c | 640 | WARN_ON(root_ht == NULL); |
1da177e4 | 641 | |
6d4c4077 | 642 | if (root_ht && --root_ht->refcnt == 1) |
458e704d | 643 | u32_destroy_hnode(tp, root_ht, extack); |
1da177e4 LT |
644 | |
645 | if (--tp_c->refcnt == 0) { | |
646 | struct tc_u_hnode *ht; | |
1da177e4 | 647 | |
3cd904ec | 648 | hlist_del(&tp_c->hnode); |
1da177e4 | 649 | |
1ce87720 | 650 | while ((ht = rtnl_dereference(tp_c->hlist)) != NULL) { |
d7cdee5e | 651 | u32_clear_hnode(tp, ht, extack); |
1ce87720 | 652 | RCU_INIT_POINTER(tp_c->hlist, ht->next); |
d7cdee5e PA |
653 | |
654 | /* u32_destroy_key() will later free ht for us, if it's | |
655 | * still referenced by some knode | |
656 | */ | |
657 | if (--ht->refcnt == 0) | |
658 | kfree_rcu(ht, rcu); | |
3ff50b79 | 659 | } |
1da177e4 | 660 | |
e7614370 | 661 | idr_destroy(&tp_c->handle_idr); |
1da177e4 LT |
662 | kfree(tp_c); |
663 | } | |
664 | ||
665 | tp->data = NULL; | |
666 | } | |
667 | ||
571acf21 | 668 | static int u32_delete(struct tcf_proto *tp, void *arg, bool *last, |
12db03b6 | 669 | bool rtnl_held, struct netlink_ext_ack *extack) |
1da177e4 | 670 | { |
8113c095 | 671 | struct tc_u_hnode *ht = arg; |
763dbf63 WC |
672 | struct tc_u_common *tp_c = tp->data; |
673 | int ret = 0; | |
1da177e4 | 674 | |
a1b7c5fd | 675 | if (TC_U32_KEY(ht->handle)) { |
458e704d | 676 | u32_remove_hw_knode(tp, (struct tc_u_knode *)ht, extack); |
763dbf63 WC |
677 | ret = u32_delete_key(tp, (struct tc_u_knode *)ht); |
678 | goto out; | |
a1b7c5fd | 679 | } |
1da177e4 | 680 | |
b44ef845 | 681 | if (ht->is_root) { |
4b981dbc | 682 | NL_SET_ERR_MSG_MOD(extack, "Not allowed to delete root node"); |
1da177e4 | 683 | return -EINVAL; |
4b981dbc | 684 | } |
1da177e4 | 685 | |
e56cfad1 | 686 | if (ht->refcnt == 1) { |
458e704d | 687 | u32_destroy_hnode(tp, ht, extack); |
e56cfad1 | 688 | } else { |
4b981dbc | 689 | NL_SET_ERR_MSG_MOD(extack, "Can not delete in-use filter"); |
e56cfad1 JP |
690 | return -EBUSY; |
691 | } | |
1da177e4 | 692 | |
763dbf63 | 693 | out: |
a0305986 | 694 | *last = tp_c->refcnt == 1 && tp_c->knodes == 0; |
763dbf63 | 695 | return ret; |
1da177e4 LT |
696 | } |
697 | ||
e7614370 | 698 | static u32 gen_new_kid(struct tc_u_hnode *ht, u32 htid) |
1da177e4 | 699 | { |
f730cb93 | 700 | u32 index = htid | 0x800; |
e7614370 | 701 | u32 max = htid | 0xFFF; |
e7614370 | 702 | |
f730cb93 MW |
703 | if (idr_alloc_u32(&ht->handle_idr, NULL, &index, max, GFP_KERNEL)) { |
704 | index = htid + 1; | |
705 | if (idr_alloc_u32(&ht->handle_idr, NULL, &index, max, | |
706 | GFP_KERNEL)) | |
707 | index = max; | |
e7614370 | 708 | } |
7801db8a | 709 | |
f730cb93 | 710 | return index; |
1da177e4 LT |
711 | } |
712 | ||
6fa8c014 PM |
713 | static const struct nla_policy u32_policy[TCA_U32_MAX + 1] = { |
714 | [TCA_U32_CLASSID] = { .type = NLA_U32 }, | |
715 | [TCA_U32_HASH] = { .type = NLA_U32 }, | |
716 | [TCA_U32_LINK] = { .type = NLA_U32 }, | |
717 | [TCA_U32_DIVISOR] = { .type = NLA_U32 }, | |
718 | [TCA_U32_SEL] = { .len = sizeof(struct tc_u32_sel) }, | |
719 | [TCA_U32_INDEV] = { .type = NLA_STRING, .len = IFNAMSIZ }, | |
720 | [TCA_U32_MARK] = { .len = sizeof(struct tc_u32_mark) }, | |
9e8ce79c | 721 | [TCA_U32_FLAGS] = { .type = NLA_U32 }, |
6fa8c014 PM |
722 | }; |
723 | ||
c1b52739 | 724 | static int u32_set_parms(struct net *net, struct tcf_proto *tp, |
8a8065f6 | 725 | unsigned long base, |
add93b61 | 726 | struct tc_u_knode *n, struct nlattr **tb, |
50a56190 AA |
727 | struct nlattr *est, bool ovr, |
728 | struct netlink_ext_ack *extack) | |
1da177e4 | 729 | { |
b9a24bb7 | 730 | int err; |
1da177e4 | 731 | |
ec6743a1 | 732 | err = tcf_exts_validate(net, tp, tb, est, &n->exts, ovr, true, extack); |
1da177e4 LT |
733 | if (err < 0) |
734 | return err; | |
735 | ||
add93b61 | 736 | if (tb[TCA_U32_LINK]) { |
1587bac4 | 737 | u32 handle = nla_get_u32(tb[TCA_U32_LINK]); |
47a1a1d4 | 738 | struct tc_u_hnode *ht_down = NULL, *ht_old; |
1da177e4 | 739 | |
4b981dbc AA |
740 | if (TC_U32_KEY(handle)) { |
741 | NL_SET_ERR_MSG_MOD(extack, "u32 Link handle must be a hash table"); | |
705c7091 | 742 | return -EINVAL; |
4b981dbc | 743 | } |
1da177e4 LT |
744 | |
745 | if (handle) { | |
8a8065f6 | 746 | ht_down = u32_lookup_ht(tp->data, handle); |
1da177e4 | 747 | |
4b981dbc AA |
748 | if (!ht_down) { |
749 | NL_SET_ERR_MSG_MOD(extack, "Link hash table not found"); | |
705c7091 | 750 | return -EINVAL; |
4b981dbc | 751 | } |
27594ec4 AV |
752 | if (ht_down->is_root) { |
753 | NL_SET_ERR_MSG_MOD(extack, "Not linking to root node"); | |
754 | return -EINVAL; | |
755 | } | |
1da177e4 LT |
756 | ht_down->refcnt++; |
757 | } | |
758 | ||
1ce87720 JF |
759 | ht_old = rtnl_dereference(n->ht_down); |
760 | rcu_assign_pointer(n->ht_down, ht_down); | |
1da177e4 | 761 | |
47a1a1d4 PM |
762 | if (ht_old) |
763 | ht_old->refcnt--; | |
1da177e4 | 764 | } |
add93b61 | 765 | if (tb[TCA_U32_CLASSID]) { |
1587bac4 | 766 | n->res.classid = nla_get_u32(tb[TCA_U32_CLASSID]); |
1da177e4 LT |
767 | tcf_bind_filter(tp, &n->res, base); |
768 | } | |
769 | ||
770 | #ifdef CONFIG_NET_CLS_IND | |
add93b61 | 771 | if (tb[TCA_U32_INDEV]) { |
2519a602 | 772 | int ret; |
1057c55f | 773 | ret = tcf_change_indev(net, tb[TCA_U32_INDEV], extack); |
2519a602 | 774 | if (ret < 0) |
705c7091 | 775 | return -EINVAL; |
2519a602 | 776 | n->ifindex = ret; |
1da177e4 LT |
777 | } |
778 | #endif | |
1da177e4 | 779 | return 0; |
1da177e4 LT |
780 | } |
781 | ||
5a7a5555 | 782 | static void u32_replace_knode(struct tcf_proto *tp, struct tc_u_common *tp_c, |
de5df632 JF |
783 | struct tc_u_knode *n) |
784 | { | |
785 | struct tc_u_knode __rcu **ins; | |
786 | struct tc_u_knode *pins; | |
787 | struct tc_u_hnode *ht; | |
788 | ||
789 | if (TC_U32_HTID(n->handle) == TC_U32_ROOT) | |
790 | ht = rtnl_dereference(tp->root); | |
791 | else | |
792 | ht = u32_lookup_ht(tp_c, TC_U32_HTID(n->handle)); | |
793 | ||
794 | ins = &ht->ht[TC_U32_HASH(n->handle)]; | |
795 | ||
796 | /* The node must always exist for it to be replaced if this is not the | |
797 | * case then something went very wrong elsewhere. | |
798 | */ | |
799 | for (pins = rtnl_dereference(*ins); ; | |
800 | ins = &pins->next, pins = rtnl_dereference(*ins)) | |
801 | if (pins->handle == n->handle) | |
802 | break; | |
803 | ||
234a4624 | 804 | idr_replace(&ht->handle_idr, n, n->handle); |
de5df632 JF |
805 | RCU_INIT_POINTER(n->next, pins->next); |
806 | rcu_assign_pointer(*ins, n); | |
807 | } | |
808 | ||
14215108 | 809 | static struct tc_u_knode *u32_init_knode(struct net *net, struct tcf_proto *tp, |
de5df632 JF |
810 | struct tc_u_knode *n) |
811 | { | |
058a6c03 | 812 | struct tc_u_hnode *ht = rtnl_dereference(n->ht_down); |
de5df632 | 813 | struct tc_u32_sel *s = &n->sel; |
058a6c03 | 814 | struct tc_u_knode *new; |
de5df632 JF |
815 | |
816 | new = kzalloc(sizeof(*n) + s->nkeys*sizeof(struct tc_u32_key), | |
817 | GFP_KERNEL); | |
818 | ||
819 | if (!new) | |
820 | return NULL; | |
821 | ||
822 | RCU_INIT_POINTER(new->next, n->next); | |
823 | new->handle = n->handle; | |
824 | RCU_INIT_POINTER(new->ht_up, n->ht_up); | |
825 | ||
826 | #ifdef CONFIG_NET_CLS_IND | |
827 | new->ifindex = n->ifindex; | |
828 | #endif | |
829 | new->fshift = n->fshift; | |
830 | new->res = n->res; | |
9e8ce79c | 831 | new->flags = n->flags; |
058a6c03 | 832 | RCU_INIT_POINTER(new->ht_down, ht); |
de5df632 JF |
833 | |
834 | /* bump reference count as long as we hold pointer to structure */ | |
058a6c03 PA |
835 | if (ht) |
836 | ht->refcnt++; | |
de5df632 JF |
837 | |
838 | #ifdef CONFIG_CLS_U32_PERF | |
839 | /* Statistics may be incremented by readers during update | |
840 | * so we must keep them in tact. When the node is later destroyed | |
841 | * a special destroy call must be made to not free the pf memory. | |
842 | */ | |
843 | new->pf = n->pf; | |
844 | #endif | |
845 | ||
846 | #ifdef CONFIG_CLS_U32_MARK | |
847 | new->val = n->val; | |
848 | new->mask = n->mask; | |
849 | /* Similarly success statistics must be moved as pointers */ | |
850 | new->pcpu_success = n->pcpu_success; | |
851 | #endif | |
e512fcf0 | 852 | memcpy(&new->sel, s, struct_size(s, keys, s->nkeys)); |
de5df632 | 853 | |
14215108 | 854 | if (tcf_exts_init(&new->exts, net, TCA_U32_ACT, TCA_U32_POLICE)) { |
b9a24bb7 WC |
855 | kfree(new); |
856 | return NULL; | |
857 | } | |
de5df632 JF |
858 | |
859 | return new; | |
860 | } | |
861 | ||
c1b52739 | 862 | static int u32_change(struct net *net, struct sk_buff *in_skb, |
af4c6641 | 863 | struct tcf_proto *tp, unsigned long base, u32 handle, |
12db03b6 | 864 | struct nlattr **tca, void **arg, bool ovr, bool rtnl_held, |
7306db38 | 865 | struct netlink_ext_ack *extack) |
1da177e4 LT |
866 | { |
867 | struct tc_u_common *tp_c = tp->data; | |
868 | struct tc_u_hnode *ht; | |
869 | struct tc_u_knode *n; | |
870 | struct tc_u32_sel *s; | |
add93b61 PM |
871 | struct nlattr *opt = tca[TCA_OPTIONS]; |
872 | struct nlattr *tb[TCA_U32_MAX + 1]; | |
9e8ce79c | 873 | u32 htid, flags = 0; |
98c8f125 | 874 | size_t sel_size; |
1da177e4 | 875 | int err; |
459d5f62 JF |
876 | #ifdef CONFIG_CLS_U32_PERF |
877 | size_t size; | |
878 | #endif | |
1da177e4 | 879 | |
4b981dbc AA |
880 | if (!opt) { |
881 | if (handle) { | |
882 | NL_SET_ERR_MSG_MOD(extack, "Filter handle requires options"); | |
883 | return -EINVAL; | |
884 | } else { | |
885 | return 0; | |
886 | } | |
887 | } | |
1da177e4 | 888 | |
8cb08174 JB |
889 | err = nla_parse_nested_deprecated(tb, TCA_U32_MAX, opt, u32_policy, |
890 | extack); | |
cee63723 PM |
891 | if (err < 0) |
892 | return err; | |
1da177e4 | 893 | |
d34e3e18 | 894 | if (tb[TCA_U32_FLAGS]) { |
9e8ce79c | 895 | flags = nla_get_u32(tb[TCA_U32_FLAGS]); |
4b981dbc AA |
896 | if (!tc_flags_valid(flags)) { |
897 | NL_SET_ERR_MSG_MOD(extack, "Invalid filter flags"); | |
1a0f7d29 | 898 | return -EINVAL; |
4b981dbc | 899 | } |
d34e3e18 | 900 | } |
9e8ce79c | 901 | |
8113c095 | 902 | n = *arg; |
cc7ec456 | 903 | if (n) { |
de5df632 JF |
904 | struct tc_u_knode *new; |
905 | ||
4b981dbc AA |
906 | if (TC_U32_KEY(n->handle) == 0) { |
907 | NL_SET_ERR_MSG_MOD(extack, "Key node id cannot be zero"); | |
1da177e4 | 908 | return -EINVAL; |
4b981dbc | 909 | } |
1da177e4 | 910 | |
eb53f7af IV |
911 | if ((n->flags ^ flags) & |
912 | ~(TCA_CLS_FLAGS_IN_HW | TCA_CLS_FLAGS_NOT_IN_HW)) { | |
4b981dbc | 913 | NL_SET_ERR_MSG_MOD(extack, "Key node flags do not match passed flags"); |
9e8ce79c | 914 | return -EINVAL; |
4b981dbc | 915 | } |
9e8ce79c | 916 | |
14215108 | 917 | new = u32_init_knode(net, tp, n); |
de5df632 JF |
918 | if (!new) |
919 | return -ENOMEM; | |
920 | ||
8a8065f6 | 921 | err = u32_set_parms(net, tp, base, new, tb, |
50a56190 | 922 | tca[TCA_RATE], ovr, extack); |
de5df632 JF |
923 | |
924 | if (err) { | |
dc07c573 | 925 | u32_destroy_key(new, false); |
de5df632 JF |
926 | return err; |
927 | } | |
928 | ||
10a47e0f | 929 | err = u32_replace_hw_knode(tp, new, flags, extack); |
d34e3e18 | 930 | if (err) { |
dc07c573 | 931 | u32_destroy_key(new, false); |
d34e3e18 SS |
932 | return err; |
933 | } | |
934 | ||
24d3dc6d OG |
935 | if (!tc_in_hw(new->flags)) |
936 | new->flags |= TCA_CLS_FLAGS_NOT_IN_HW; | |
937 | ||
de5df632 | 938 | u32_replace_knode(tp, tp_c, new); |
a0efb80c | 939 | tcf_unbind_filter(tp, &n->res); |
35c55fc1 | 940 | tcf_exts_get_net(&n->exts); |
aaa908ff | 941 | tcf_queue_work(&n->rwork, u32_delete_key_work); |
de5df632 | 942 | return 0; |
1da177e4 LT |
943 | } |
944 | ||
add93b61 | 945 | if (tb[TCA_U32_DIVISOR]) { |
cc7ec456 | 946 | unsigned int divisor = nla_get_u32(tb[TCA_U32_DIVISOR]); |
1da177e4 | 947 | |
2f0c982d AV |
948 | if (!is_power_of_2(divisor)) { |
949 | NL_SET_ERR_MSG_MOD(extack, "Divisor is not a power of 2"); | |
950 | return -EINVAL; | |
951 | } | |
952 | if (divisor-- > 0x100) { | |
4b981dbc | 953 | NL_SET_ERR_MSG_MOD(extack, "Exceeded maximum 256 hash buckets"); |
1da177e4 | 954 | return -EINVAL; |
4b981dbc AA |
955 | } |
956 | if (TC_U32_KEY(handle)) { | |
957 | NL_SET_ERR_MSG_MOD(extack, "Divisor can only be used on a hash table"); | |
1da177e4 | 958 | return -EINVAL; |
4b981dbc | 959 | } |
cc7ec456 | 960 | ht = kzalloc(sizeof(*ht) + divisor*sizeof(void *), GFP_KERNEL); |
1da177e4 LT |
961 | if (ht == NULL) |
962 | return -ENOBUFS; | |
e7614370 CW |
963 | if (handle == 0) { |
964 | handle = gen_new_htid(tp->data, ht); | |
965 | if (handle == 0) { | |
966 | kfree(ht); | |
967 | return -ENOMEM; | |
968 | } | |
969 | } else { | |
f730cb93 MW |
970 | err = idr_alloc_u32(&tp_c->handle_idr, ht, &handle, |
971 | handle, GFP_KERNEL); | |
e7614370 CW |
972 | if (err) { |
973 | kfree(ht); | |
974 | return err; | |
975 | } | |
976 | } | |
e56cfad1 | 977 | ht->refcnt = 1; |
1da177e4 LT |
978 | ht->divisor = divisor; |
979 | ht->handle = handle; | |
980 | ht->prio = tp->prio; | |
e7614370 | 981 | idr_init(&ht->handle_idr); |
f40fe58d | 982 | ht->flags = flags; |
6eef3801 | 983 | |
10a47e0f | 984 | err = u32_replace_hw_hnode(tp, ht, flags, extack); |
6eef3801 | 985 | if (err) { |
9c160941 | 986 | idr_remove(&tp_c->handle_idr, handle); |
6eef3801 JK |
987 | kfree(ht); |
988 | return err; | |
989 | } | |
990 | ||
1ce87720 JF |
991 | RCU_INIT_POINTER(ht->next, tp_c->hlist); |
992 | rcu_assign_pointer(tp_c->hlist, ht); | |
8113c095 | 993 | *arg = ht; |
a1b7c5fd | 994 | |
1da177e4 LT |
995 | return 0; |
996 | } | |
997 | ||
add93b61 | 998 | if (tb[TCA_U32_HASH]) { |
1587bac4 | 999 | htid = nla_get_u32(tb[TCA_U32_HASH]); |
1da177e4 | 1000 | if (TC_U32_HTID(htid) == TC_U32_ROOT) { |
1ce87720 | 1001 | ht = rtnl_dereference(tp->root); |
1da177e4 LT |
1002 | htid = ht->handle; |
1003 | } else { | |
1004 | ht = u32_lookup_ht(tp->data, TC_U32_HTID(htid)); | |
4b981dbc AA |
1005 | if (!ht) { |
1006 | NL_SET_ERR_MSG_MOD(extack, "Specified hash table not found"); | |
1da177e4 | 1007 | return -EINVAL; |
4b981dbc | 1008 | } |
1da177e4 LT |
1009 | } |
1010 | } else { | |
1ce87720 | 1011 | ht = rtnl_dereference(tp->root); |
1da177e4 LT |
1012 | htid = ht->handle; |
1013 | } | |
1014 | ||
4b981dbc AA |
1015 | if (ht->divisor < TC_U32_HASH(htid)) { |
1016 | NL_SET_ERR_MSG_MOD(extack, "Specified hash table buckets exceed configured value"); | |
1da177e4 | 1017 | return -EINVAL; |
4b981dbc | 1018 | } |
1da177e4 LT |
1019 | |
1020 | if (handle) { | |
4b981dbc AA |
1021 | if (TC_U32_HTID(handle) && TC_U32_HTID(handle ^ htid)) { |
1022 | NL_SET_ERR_MSG_MOD(extack, "Handle specified hash table address mismatch"); | |
1da177e4 | 1023 | return -EINVAL; |
4b981dbc | 1024 | } |
1da177e4 | 1025 | handle = htid | TC_U32_NODE(handle); |
f730cb93 | 1026 | err = idr_alloc_u32(&ht->handle_idr, NULL, &handle, handle, |
e7614370 CW |
1027 | GFP_KERNEL); |
1028 | if (err) | |
1029 | return err; | |
1da177e4 LT |
1030 | } else |
1031 | handle = gen_new_kid(ht, htid); | |
1032 | ||
e7614370 | 1033 | if (tb[TCA_U32_SEL] == NULL) { |
4b981dbc | 1034 | NL_SET_ERR_MSG_MOD(extack, "Selector not specified"); |
e7614370 CW |
1035 | err = -EINVAL; |
1036 | goto erridr; | |
1037 | } | |
1da177e4 | 1038 | |
add93b61 | 1039 | s = nla_data(tb[TCA_U32_SEL]); |
98c8f125 KC |
1040 | sel_size = struct_size(s, keys, s->nkeys); |
1041 | if (nla_len(tb[TCA_U32_SEL]) < sel_size) { | |
1042 | err = -EINVAL; | |
1043 | goto erridr; | |
1044 | } | |
1da177e4 | 1045 | |
98c8f125 | 1046 | n = kzalloc(offsetof(typeof(*n), sel) + sel_size, GFP_KERNEL); |
e7614370 CW |
1047 | if (n == NULL) { |
1048 | err = -ENOBUFS; | |
1049 | goto erridr; | |
1050 | } | |
1da177e4 | 1051 | |
1da177e4 | 1052 | #ifdef CONFIG_CLS_U32_PERF |
459d5f62 JF |
1053 | size = sizeof(struct tc_u32_pcnt) + s->nkeys * sizeof(u64); |
1054 | n->pf = __alloc_percpu(size, __alignof__(struct tc_u32_pcnt)); | |
1055 | if (!n->pf) { | |
e7614370 CW |
1056 | err = -ENOBUFS; |
1057 | goto errfree; | |
1da177e4 | 1058 | } |
1da177e4 LT |
1059 | #endif |
1060 | ||
98c8f125 | 1061 | memcpy(&n->sel, s, sel_size); |
a96366bf | 1062 | RCU_INIT_POINTER(n->ht_up, ht); |
1da177e4 | 1063 | n->handle = handle; |
b2268016 | 1064 | n->fshift = s->hmask ? ffs(ntohl(s->hmask)) - 1 : 0; |
9e8ce79c | 1065 | n->flags = flags; |
1da177e4 | 1066 | |
14215108 | 1067 | err = tcf_exts_init(&n->exts, net, TCA_U32_ACT, TCA_U32_POLICE); |
b9a24bb7 WC |
1068 | if (err < 0) |
1069 | goto errout; | |
1070 | ||
1da177e4 | 1071 | #ifdef CONFIG_CLS_U32_MARK |
459d5f62 | 1072 | n->pcpu_success = alloc_percpu(u32); |
a1ddcfee JF |
1073 | if (!n->pcpu_success) { |
1074 | err = -ENOMEM; | |
1075 | goto errout; | |
1076 | } | |
459d5f62 | 1077 | |
add93b61 | 1078 | if (tb[TCA_U32_MARK]) { |
1da177e4 LT |
1079 | struct tc_u32_mark *mark; |
1080 | ||
add93b61 | 1081 | mark = nla_data(tb[TCA_U32_MARK]); |
459d5f62 JF |
1082 | n->val = mark->val; |
1083 | n->mask = mark->mask; | |
1da177e4 LT |
1084 | } |
1085 | #endif | |
1086 | ||
8a8065f6 | 1087 | err = u32_set_parms(net, tp, base, n, tb, tca[TCA_RATE], ovr, |
50a56190 | 1088 | extack); |
1da177e4 | 1089 | if (err == 0) { |
1ce87720 JF |
1090 | struct tc_u_knode __rcu **ins; |
1091 | struct tc_u_knode *pins; | |
1092 | ||
10a47e0f | 1093 | err = u32_replace_hw_knode(tp, n, flags, extack); |
d34e3e18 SS |
1094 | if (err) |
1095 | goto errhw; | |
1096 | ||
24d3dc6d OG |
1097 | if (!tc_in_hw(n->flags)) |
1098 | n->flags |= TCA_CLS_FLAGS_NOT_IN_HW; | |
1099 | ||
1ce87720 JF |
1100 | ins = &ht->ht[TC_U32_HASH(handle)]; |
1101 | for (pins = rtnl_dereference(*ins); pins; | |
1102 | ins = &pins->next, pins = rtnl_dereference(*ins)) | |
1103 | if (TC_U32_NODE(handle) < TC_U32_NODE(pins->handle)) | |
1da177e4 LT |
1104 | break; |
1105 | ||
1ce87720 JF |
1106 | RCU_INIT_POINTER(n->next, pins); |
1107 | rcu_assign_pointer(*ins, n); | |
b245d32c | 1108 | tp_c->knodes++; |
8113c095 | 1109 | *arg = n; |
1da177e4 LT |
1110 | return 0; |
1111 | } | |
a1ddcfee | 1112 | |
d34e3e18 | 1113 | errhw: |
a1ddcfee JF |
1114 | #ifdef CONFIG_CLS_U32_MARK |
1115 | free_percpu(n->pcpu_success); | |
1116 | #endif | |
1117 | ||
b9a24bb7 WC |
1118 | errout: |
1119 | tcf_exts_destroy(&n->exts); | |
1da177e4 | 1120 | #ifdef CONFIG_CLS_U32_PERF |
e7614370 | 1121 | errfree: |
1ce87720 | 1122 | free_percpu(n->pf); |
1da177e4 LT |
1123 | #endif |
1124 | kfree(n); | |
e7614370 | 1125 | erridr: |
9c160941 | 1126 | idr_remove(&ht->handle_idr, handle); |
1da177e4 LT |
1127 | return err; |
1128 | } | |
1129 | ||
12db03b6 VB |
1130 | static void u32_walk(struct tcf_proto *tp, struct tcf_walker *arg, |
1131 | bool rtnl_held) | |
1da177e4 LT |
1132 | { |
1133 | struct tc_u_common *tp_c = tp->data; | |
1134 | struct tc_u_hnode *ht; | |
1135 | struct tc_u_knode *n; | |
cc7ec456 | 1136 | unsigned int h; |
1da177e4 LT |
1137 | |
1138 | if (arg->stop) | |
1139 | return; | |
1140 | ||
1ce87720 JF |
1141 | for (ht = rtnl_dereference(tp_c->hlist); |
1142 | ht; | |
1143 | ht = rtnl_dereference(ht->next)) { | |
1da177e4 LT |
1144 | if (ht->prio != tp->prio) |
1145 | continue; | |
1146 | if (arg->count >= arg->skip) { | |
8113c095 | 1147 | if (arg->fn(tp, ht, arg) < 0) { |
1da177e4 LT |
1148 | arg->stop = 1; |
1149 | return; | |
1150 | } | |
1151 | } | |
1152 | arg->count++; | |
1153 | for (h = 0; h <= ht->divisor; h++) { | |
1ce87720 JF |
1154 | for (n = rtnl_dereference(ht->ht[h]); |
1155 | n; | |
1156 | n = rtnl_dereference(n->next)) { | |
1da177e4 LT |
1157 | if (arg->count < arg->skip) { |
1158 | arg->count++; | |
1159 | continue; | |
1160 | } | |
8113c095 | 1161 | if (arg->fn(tp, n, arg) < 0) { |
1da177e4 LT |
1162 | arg->stop = 1; |
1163 | return; | |
1164 | } | |
1165 | arg->count++; | |
1166 | } | |
1167 | } | |
1168 | } | |
1169 | } | |
1170 | ||
530d9951 JH |
1171 | static int u32_reoffload_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht, |
1172 | bool add, tc_setup_cb_t *cb, void *cb_priv, | |
1173 | struct netlink_ext_ack *extack) | |
1174 | { | |
88c44a52 | 1175 | struct tcf_block *block = tp->chain->block; |
530d9951 JH |
1176 | struct tc_cls_u32_offload cls_u32 = {}; |
1177 | int err; | |
1178 | ||
88c44a52 PJV |
1179 | tc_cls_common_offload_init(&cls_u32.common, tp, ht->flags, block, |
1180 | extack); | |
530d9951 JH |
1181 | cls_u32.command = add ? TC_CLSU32_NEW_HNODE : TC_CLSU32_DELETE_HNODE; |
1182 | cls_u32.hnode.divisor = ht->divisor; | |
1183 | cls_u32.hnode.handle = ht->handle; | |
1184 | cls_u32.hnode.prio = ht->prio; | |
1185 | ||
1186 | err = cb(TC_SETUP_CLSU32, &cls_u32, cb_priv); | |
1187 | if (err && add && tc_skip_sw(ht->flags)) | |
1188 | return err; | |
1189 | ||
1190 | return 0; | |
1191 | } | |
1192 | ||
1193 | static int u32_reoffload_knode(struct tcf_proto *tp, struct tc_u_knode *n, | |
1194 | bool add, tc_setup_cb_t *cb, void *cb_priv, | |
1195 | struct netlink_ext_ack *extack) | |
1196 | { | |
1197 | struct tc_u_hnode *ht = rtnl_dereference(n->ht_down); | |
1198 | struct tcf_block *block = tp->chain->block; | |
1199 | struct tc_cls_u32_offload cls_u32 = {}; | |
1200 | int err; | |
1201 | ||
88c44a52 PJV |
1202 | tc_cls_common_offload_init(&cls_u32.common, tp, n->flags, block, |
1203 | extack); | |
530d9951 JH |
1204 | cls_u32.command = add ? |
1205 | TC_CLSU32_REPLACE_KNODE : TC_CLSU32_DELETE_KNODE; | |
1206 | cls_u32.knode.handle = n->handle; | |
1207 | ||
1208 | if (add) { | |
1209 | cls_u32.knode.fshift = n->fshift; | |
1210 | #ifdef CONFIG_CLS_U32_MARK | |
1211 | cls_u32.knode.val = n->val; | |
1212 | cls_u32.knode.mask = n->mask; | |
1213 | #else | |
1214 | cls_u32.knode.val = 0; | |
1215 | cls_u32.knode.mask = 0; | |
1216 | #endif | |
1217 | cls_u32.knode.sel = &n->sel; | |
068ceb35 | 1218 | cls_u32.knode.res = &n->res; |
530d9951 JH |
1219 | cls_u32.knode.exts = &n->exts; |
1220 | if (n->ht_down) | |
1221 | cls_u32.knode.link_handle = ht->handle; | |
1222 | } | |
1223 | ||
1224 | err = cb(TC_SETUP_CLSU32, &cls_u32, cb_priv); | |
1225 | if (err) { | |
1226 | if (add && tc_skip_sw(n->flags)) | |
1227 | return err; | |
1228 | return 0; | |
1229 | } | |
1230 | ||
1231 | tc_cls_offload_cnt_update(block, &n->in_hw_count, &n->flags, add); | |
1232 | ||
1233 | return 0; | |
1234 | } | |
1235 | ||
1236 | static int u32_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb, | |
1237 | void *cb_priv, struct netlink_ext_ack *extack) | |
1238 | { | |
1239 | struct tc_u_common *tp_c = tp->data; | |
1240 | struct tc_u_hnode *ht; | |
1241 | struct tc_u_knode *n; | |
1242 | unsigned int h; | |
1243 | int err; | |
1244 | ||
1245 | for (ht = rtnl_dereference(tp_c->hlist); | |
1246 | ht; | |
1247 | ht = rtnl_dereference(ht->next)) { | |
1248 | if (ht->prio != tp->prio) | |
1249 | continue; | |
1250 | ||
1251 | /* When adding filters to a new dev, try to offload the | |
1252 | * hashtable first. When removing, do the filters before the | |
1253 | * hashtable. | |
1254 | */ | |
1255 | if (add && !tc_skip_hw(ht->flags)) { | |
1256 | err = u32_reoffload_hnode(tp, ht, add, cb, cb_priv, | |
1257 | extack); | |
1258 | if (err) | |
1259 | return err; | |
1260 | } | |
1261 | ||
1262 | for (h = 0; h <= ht->divisor; h++) { | |
1263 | for (n = rtnl_dereference(ht->ht[h]); | |
1264 | n; | |
1265 | n = rtnl_dereference(n->next)) { | |
1266 | if (tc_skip_hw(n->flags)) | |
1267 | continue; | |
1268 | ||
1269 | err = u32_reoffload_knode(tp, n, add, cb, | |
1270 | cb_priv, extack); | |
1271 | if (err) | |
1272 | return err; | |
1273 | } | |
1274 | } | |
1275 | ||
1276 | if (!add && !tc_skip_hw(ht->flags)) | |
1277 | u32_reoffload_hnode(tp, ht, add, cb, cb_priv, extack); | |
1278 | } | |
1279 | ||
1280 | return 0; | |
1281 | } | |
1282 | ||
07d79fc7 CW |
1283 | static void u32_bind_class(void *fh, u32 classid, unsigned long cl) |
1284 | { | |
1285 | struct tc_u_knode *n = fh; | |
1286 | ||
1287 | if (n && n->res.classid == classid) | |
1288 | n->res.class = cl; | |
1289 | } | |
1290 | ||
8113c095 | 1291 | static int u32_dump(struct net *net, struct tcf_proto *tp, void *fh, |
12db03b6 | 1292 | struct sk_buff *skb, struct tcmsg *t, bool rtnl_held) |
1da177e4 | 1293 | { |
8113c095 | 1294 | struct tc_u_knode *n = fh; |
1ce87720 | 1295 | struct tc_u_hnode *ht_up, *ht_down; |
4b3550ef | 1296 | struct nlattr *nest; |
1da177e4 LT |
1297 | |
1298 | if (n == NULL) | |
1299 | return skb->len; | |
1300 | ||
1301 | t->tcm_handle = n->handle; | |
1302 | ||
ae0be8de | 1303 | nest = nla_nest_start_noflag(skb, TCA_OPTIONS); |
4b3550ef PM |
1304 | if (nest == NULL) |
1305 | goto nla_put_failure; | |
1da177e4 LT |
1306 | |
1307 | if (TC_U32_KEY(n->handle) == 0) { | |
8113c095 | 1308 | struct tc_u_hnode *ht = fh; |
cc7ec456 ED |
1309 | u32 divisor = ht->divisor + 1; |
1310 | ||
1b34ec43 DM |
1311 | if (nla_put_u32(skb, TCA_U32_DIVISOR, divisor)) |
1312 | goto nla_put_failure; | |
1da177e4 | 1313 | } else { |
459d5f62 JF |
1314 | #ifdef CONFIG_CLS_U32_PERF |
1315 | struct tc_u32_pcnt *gpf; | |
459d5f62 | 1316 | int cpu; |
80aab73d | 1317 | #endif |
459d5f62 | 1318 | |
1b34ec43 DM |
1319 | if (nla_put(skb, TCA_U32_SEL, |
1320 | sizeof(n->sel) + n->sel.nkeys*sizeof(struct tc_u32_key), | |
1321 | &n->sel)) | |
1322 | goto nla_put_failure; | |
1ce87720 JF |
1323 | |
1324 | ht_up = rtnl_dereference(n->ht_up); | |
1325 | if (ht_up) { | |
1da177e4 | 1326 | u32 htid = n->handle & 0xFFFFF000; |
1b34ec43 DM |
1327 | if (nla_put_u32(skb, TCA_U32_HASH, htid)) |
1328 | goto nla_put_failure; | |
1da177e4 | 1329 | } |
1b34ec43 DM |
1330 | if (n->res.classid && |
1331 | nla_put_u32(skb, TCA_U32_CLASSID, n->res.classid)) | |
1332 | goto nla_put_failure; | |
1ce87720 JF |
1333 | |
1334 | ht_down = rtnl_dereference(n->ht_down); | |
1335 | if (ht_down && | |
1336 | nla_put_u32(skb, TCA_U32_LINK, ht_down->handle)) | |
1b34ec43 | 1337 | goto nla_put_failure; |
1da177e4 | 1338 | |
9e8ce79c JF |
1339 | if (n->flags && nla_put_u32(skb, TCA_U32_FLAGS, n->flags)) |
1340 | goto nla_put_failure; | |
1341 | ||
1da177e4 | 1342 | #ifdef CONFIG_CLS_U32_MARK |
459d5f62 JF |
1343 | if ((n->val || n->mask)) { |
1344 | struct tc_u32_mark mark = {.val = n->val, | |
1345 | .mask = n->mask, | |
1346 | .success = 0}; | |
80aab73d | 1347 | int cpum; |
459d5f62 | 1348 | |
80aab73d JF |
1349 | for_each_possible_cpu(cpum) { |
1350 | __u32 cnt = *per_cpu_ptr(n->pcpu_success, cpum); | |
459d5f62 JF |
1351 | |
1352 | mark.success += cnt; | |
1353 | } | |
1354 | ||
1355 | if (nla_put(skb, TCA_U32_MARK, sizeof(mark), &mark)) | |
1356 | goto nla_put_failure; | |
1357 | } | |
1da177e4 LT |
1358 | #endif |
1359 | ||
5da57f42 | 1360 | if (tcf_exts_dump(skb, &n->exts) < 0) |
add93b61 | 1361 | goto nla_put_failure; |
1da177e4 LT |
1362 | |
1363 | #ifdef CONFIG_NET_CLS_IND | |
2519a602 WC |
1364 | if (n->ifindex) { |
1365 | struct net_device *dev; | |
1366 | dev = __dev_get_by_index(net, n->ifindex); | |
1367 | if (dev && nla_put_string(skb, TCA_U32_INDEV, dev->name)) | |
1368 | goto nla_put_failure; | |
1369 | } | |
1da177e4 LT |
1370 | #endif |
1371 | #ifdef CONFIG_CLS_U32_PERF | |
459d5f62 JF |
1372 | gpf = kzalloc(sizeof(struct tc_u32_pcnt) + |
1373 | n->sel.nkeys * sizeof(u64), | |
1374 | GFP_KERNEL); | |
1375 | if (!gpf) | |
1376 | goto nla_put_failure; | |
1377 | ||
1378 | for_each_possible_cpu(cpu) { | |
1379 | int i; | |
1380 | struct tc_u32_pcnt *pf = per_cpu_ptr(n->pf, cpu); | |
1381 | ||
1382 | gpf->rcnt += pf->rcnt; | |
1383 | gpf->rhit += pf->rhit; | |
1384 | for (i = 0; i < n->sel.nkeys; i++) | |
1385 | gpf->kcnts[i] += pf->kcnts[i]; | |
1386 | } | |
1387 | ||
9854518e ND |
1388 | if (nla_put_64bit(skb, TCA_U32_PCNT, |
1389 | sizeof(struct tc_u32_pcnt) + | |
1390 | n->sel.nkeys * sizeof(u64), | |
1391 | gpf, TCA_U32_PAD)) { | |
459d5f62 | 1392 | kfree(gpf); |
1b34ec43 | 1393 | goto nla_put_failure; |
459d5f62 JF |
1394 | } |
1395 | kfree(gpf); | |
1da177e4 LT |
1396 | #endif |
1397 | } | |
1398 | ||
4b3550ef PM |
1399 | nla_nest_end(skb, nest); |
1400 | ||
1da177e4 | 1401 | if (TC_U32_KEY(n->handle)) |
5da57f42 | 1402 | if (tcf_exts_dump_stats(skb, &n->exts) < 0) |
add93b61 | 1403 | goto nla_put_failure; |
1da177e4 LT |
1404 | return skb->len; |
1405 | ||
add93b61 | 1406 | nla_put_failure: |
4b3550ef | 1407 | nla_nest_cancel(skb, nest); |
1da177e4 LT |
1408 | return -1; |
1409 | } | |
1410 | ||
2eb9d75c | 1411 | static struct tcf_proto_ops cls_u32_ops __read_mostly = { |
1da177e4 LT |
1412 | .kind = "u32", |
1413 | .classify = u32_classify, | |
1414 | .init = u32_init, | |
1415 | .destroy = u32_destroy, | |
1416 | .get = u32_get, | |
1da177e4 LT |
1417 | .change = u32_change, |
1418 | .delete = u32_delete, | |
1419 | .walk = u32_walk, | |
530d9951 | 1420 | .reoffload = u32_reoffload, |
1da177e4 | 1421 | .dump = u32_dump, |
07d79fc7 | 1422 | .bind_class = u32_bind_class, |
1da177e4 LT |
1423 | .owner = THIS_MODULE, |
1424 | }; | |
1425 | ||
1426 | static int __init init_u32(void) | |
1427 | { | |
3cd904ec WC |
1428 | int i, ret; |
1429 | ||
6ff9c364 | 1430 | pr_info("u32 classifier\n"); |
1da177e4 | 1431 | #ifdef CONFIG_CLS_U32_PERF |
6ff9c364 | 1432 | pr_info(" Performance counters on\n"); |
1da177e4 | 1433 | #endif |
1da177e4 | 1434 | #ifdef CONFIG_NET_CLS_IND |
6ff9c364 | 1435 | pr_info(" input device check on\n"); |
1da177e4 LT |
1436 | #endif |
1437 | #ifdef CONFIG_NET_CLS_ACT | |
6ff9c364 | 1438 | pr_info(" Actions configured\n"); |
1da177e4 | 1439 | #endif |
3cd904ec WC |
1440 | tc_u_common_hash = kvmalloc_array(U32_HASH_SIZE, |
1441 | sizeof(struct hlist_head), | |
1442 | GFP_KERNEL); | |
1443 | if (!tc_u_common_hash) | |
1444 | return -ENOMEM; | |
1445 | ||
1446 | for (i = 0; i < U32_HASH_SIZE; i++) | |
1447 | INIT_HLIST_HEAD(&tc_u_common_hash[i]); | |
1448 | ||
1449 | ret = register_tcf_proto_ops(&cls_u32_ops); | |
1450 | if (ret) | |
1451 | kvfree(tc_u_common_hash); | |
1452 | return ret; | |
1da177e4 LT |
1453 | } |
1454 | ||
10297b99 | 1455 | static void __exit exit_u32(void) |
1da177e4 LT |
1456 | { |
1457 | unregister_tcf_proto_ops(&cls_u32_ops); | |
3cd904ec | 1458 | kvfree(tc_u_common_hash); |
1da177e4 LT |
1459 | } |
1460 | ||
1461 | module_init(init_u32) | |
1462 | module_exit(exit_u32) | |
1463 | MODULE_LICENSE("GPL"); |