2 *------------------------------------------------------------------
3 * Copyright (c) 2017 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 *------------------------------------------------------------------
19 #include <netinet/in.h>
21 #include <vlibapi/api.h>
22 #include <vlibmemory/api.h>
24 #include <vlib/vlib.h>
25 #include <vnet/vnet.h>
26 #include <vnet/pg/pg.h>
27 #include <vppinfra/error.h>
28 #include <vnet/plugin/plugin.h>
30 #include <vppinfra/bihash_48_8.h>
32 #include "hash_lookup.h"
33 #include "hash_lookup_private.h"
36 always_inline applied_hash_ace_entry_t **get_applied_hash_aces(acl_main_t *am, u32 lc_index)
38 applied_hash_ace_entry_t **applied_hash_aces = vec_elt_at_index(am->hash_entry_vec_by_lc_index, lc_index);
40 /*is_input ? vec_elt_at_index(am->input_hash_entry_vec_by_sw_if_index, sw_if_index)
41 : vec_elt_at_index(am->output_hash_entry_vec_by_sw_if_index, sw_if_index);
43 return applied_hash_aces;
48 hashtable_add_del(acl_main_t *am, clib_bihash_kv_48_8_t *kv, int is_add)
50 DBG("HASH ADD/DEL: %016llx %016llx %016llx %016llx %016llx %016llx %016llx add %d",
51 kv->key[0], kv->key[1], kv->key[2],
52 kv->key[3], kv->key[4], kv->key[5], kv->value, is_add);
53 BV (clib_bihash_add_del) (&am->acl_lookup_hash, kv, is_add);
59 * Initial adaptation by Valerio Bruschi (valerio.bruschi@telecom-paristech.fr)
60 * based on the TupleMerge [1] simulator kindly made available
61 * by James Daly (dalyjamese@gmail.com) and Eric Torng (torng@cse.msu.edu)
62 * ( http://www.cse.msu.edu/~dalyjame/ or http://www.cse.msu.edu/~torng/ ),
63 * refactoring by Andrew Yourtchenko.
65 * [1] James Daly, Eric Torng "TupleMerge: Building Online Packet Classifiers
66 * by Omitting Bits", In Proc. IEEE ICCCN 2017, pp. 1-10
82 /* check if mask2 can be contained by mask1 */
84 first_mask_contains_second_mask(int is_ip6, fa_5tuple_t * mask1, fa_5tuple_t * mask2)
89 for (i = 0; i < 2; i++)
91 if ((mask1->ip6_addr[0].as_u64[i] & mask2->ip6_addr[0].as_u64[i]) !=
92 mask1->ip6_addr[0].as_u64[i])
94 if ((mask1->ip6_addr[1].as_u64[i] & mask2->ip6_addr[1].as_u64[i]) !=
95 mask1->ip6_addr[1].as_u64[i])
101 /* check the pads, both masks must have it 0 */
104 for (i=0; i<6; i++) {
105 padcheck |= mask1->l3_zero_pad[i];
106 padcheck |= mask2->l3_zero_pad[i];
110 if ((mask1->ip4_addr[0].as_u32 & mask2->ip4_addr[0].as_u32) !=
111 mask1->ip4_addr[0].as_u32)
113 if ((mask1->ip4_addr[1].as_u32 & mask2->ip4_addr[1].as_u32) !=
114 mask1->ip4_addr[1].as_u32)
118 /* take care if port are not exact-match */
119 if ((mask1->l4.as_u64 & mask2->l4.as_u64) != mask1->l4.as_u64)
122 if ((mask1->pkt.as_u64 & mask2->pkt.as_u64) != mask1->pkt.as_u64)
133 * Consider the situation when we have to create a new table
134 * T for a given rule R. This occurs for the first rule inserted and
135 * for later rules if it is incompatible with all existing tables.
136 * In this event, we need to determine mT for a new table.
137 * Setting mT = mR is not a good strategy; if another similar,
138 * but slightly less specific, rule appears we will be unable to
139 * add it to T and will thus have to create another new table. We
140 * thus consider two factors: is the rule more strongly aligned
141 * with source or destination addresses (usually the two most
142 * important fields) and how much slack needs to be given to
143 * allow for other rules. If the source and destination addresses
144 * are close together (within 4 bits for our experiments), we use
145 * both of them. Otherwise, we drop the smaller (less specific)
146 * address and its associated port field from consideration; R is
147 * predominantly aligned with one of the two fields and should
148 * be grouped with other similar rules. This is similar to TSS
149 * dropping port fields, but since it is based on observable rule
150 * characteristics it is more likely to keep important fields and
151 * discard less useful ones.
152 * We then look at the absolute lengths of the addresses. If
153 * the address is long, we are more likely to try to add shorter
154 * lengths and likewise the reverse. We thus remove a few bits
155 * from both address fields with more bits removed from longer
156 * addresses. For 32 bit addresses, we remove 4 bits, 3 for more
157 * than 24, 2 for more than 16, and so on (so 8 and fewer bits
158 * don’t have any removed). We only do this for prefix fields like
159 * addresses; both range fields (like ports) and exact match fields
160 * (like protocol) should remain as they are.
165 shift_ip4_if(u32 mask, u32 thresh, int numshifts, u32 else_val)
168 return clib_host_to_net_u32((clib_net_to_host_u32(mask) << numshifts) & 0xFFFFFFFF);
174 relax_ip4_addr(ip4_address_t *ip4_mask, int relax2) {
175 int shifts_per_relax[2][4] = { { 6, 5, 4, 2 }, { 3, 2, 1, 1 } };
177 int *shifts = shifts_per_relax[relax2];
178 if(ip4_mask->as_u32 == 0xffffffff)
179 ip4_mask->as_u32 = clib_host_to_net_u32((clib_net_to_host_u32(ip4_mask->as_u32) << shifts[0])&0xFFFFFFFF);
181 ip4_mask->as_u32 = shift_ip4_if(ip4_mask->as_u32, 0xffffff00, shifts[1],
182 shift_ip4_if(ip4_mask->as_u32, 0xffff0000, shifts[2],
183 shift_ip4_if(ip4_mask->as_u32, 0xff000000, shifts[3], ip4_mask->as_u32)));
187 relax_ip6_addr(ip6_address_t *ip6_mask, int relax2) {
189 * This "better than nothing" relax logic is based on heuristics
190 * from IPv6 knowledge, and may not be optimal.
191 * Some further tuning may be needed in the future.
193 if (ip6_mask->as_u64[0] == 0xffffffffffffffffULL) {
194 if (ip6_mask->as_u64[1] == 0xffffffffffffffffULL) {
195 /* relax a /128 down to /64 - likely to have more hosts */
196 ip6_mask->as_u64[1] = 0;
197 } else if (ip6_mask->as_u64[1] == 0) {
198 /* relax a /64 down to /56 - likely to have more subnets */
199 ip6_mask->as_u64[0] = clib_host_to_net_u64(0xffffffffffffff00ULL);
205 relax_tuple(fa_5tuple_t *mask, int is_ip6, int relax2){
206 fa_5tuple_t save_mask = *mask;
208 int counter_s = 0, counter_d = 0;
212 counter_s += count_bits(mask->ip6_addr[0].as_u64[i]);
213 counter_d += count_bits(mask->ip6_addr[1].as_u64[i]);
216 counter_s += count_bits(mask->ip4_addr[0].as_u32);
217 counter_d += count_bits(mask->ip4_addr[1].as_u32);
221 * is the rule more strongly aligned with source or destination addresses
222 * (usually the two most important fields) and how much slack needs to be
223 * given to allow for other rules. If the source and destination addresses
224 * are close together (within 4 bits for our experiments), we use both of them.
225 * Otherwise, we drop the smaller (less specific) address and its associated
226 * port field from consideration
228 const int deltaThreshold = 4;
229 /* const int deltaThreshold = 8; if IPV6? */
230 int delta = counter_s - counter_d;
231 if (-delta > deltaThreshold) {
233 mask->ip6_addr[0].as_u64[1] = mask->ip6_addr[0].as_u64[0] = 0;
235 mask->ip4_addr[0].as_u32 = 0;
236 mask->l4.port[0] = 0;
237 } else if (delta > deltaThreshold) {
239 mask->ip6_addr[1].as_u64[1] = mask->ip6_addr[1].as_u64[0] = 0;
241 mask->ip4_addr[1].as_u32 = 0;
242 mask->l4.port[1] = 0;
246 relax_ip6_addr(&mask->ip6_addr[0], relax2);
247 relax_ip6_addr(&mask->ip6_addr[1], relax2);
249 relax_ip4_addr(&mask->ip4_addr[0], relax2);
250 relax_ip4_addr(&mask->ip4_addr[1], relax2);
252 mask->pkt.is_nonfirst_fragment = 0;
253 mask->pkt.l4_valid = 0;
254 if(!first_mask_contains_second_mask(is_ip6, mask, &save_mask)){
255 DBG( "TM-relaxing-ERROR");
258 DBG( "TM-relaxing-end");
262 find_mask_type_index(acl_main_t *am, fa_5tuple_t *mask)
264 ace_mask_type_entry_t *mte;
266 pool_foreach(mte, am->ace_mask_type_pool,
268 if(memcmp(&mte->mask, mask, sizeof(*mask)) == 0)
269 return (mte - am->ace_mask_type_pool);
276 assign_mask_type_index(acl_main_t *am, fa_5tuple_t *mask)
278 u32 mask_type_index = find_mask_type_index(am, mask);
279 ace_mask_type_entry_t *mte;
280 if(~0 == mask_type_index) {
281 pool_get_aligned (am->ace_mask_type_pool, mte, CLIB_CACHE_LINE_BYTES);
282 mask_type_index = mte - am->ace_mask_type_pool;
283 clib_memcpy_fast(&mte->mask, mask, sizeof(mte->mask));
287 * We can use only 16 bits, since in the match there is only u16 field.
288 * Realistically, once you go to 64K of mask types, it is a huge
289 * problem anyway, so we might as well stop half way.
291 ASSERT(mask_type_index < 32768);
293 mte = am->ace_mask_type_pool + mask_type_index;
295 DBG0("ASSIGN MTE index %d new refcount %d", mask_type_index, mte->refcount);
296 return mask_type_index;
300 lock_mask_type_index(acl_main_t *am, u32 mask_type_index)
302 DBG0("LOCK MTE index %d", mask_type_index);
303 ace_mask_type_entry_t *mte = pool_elt_at_index(am->ace_mask_type_pool, mask_type_index);
305 DBG0("LOCK MTE index %d new refcount %d", mask_type_index, mte->refcount);
310 release_mask_type_index(acl_main_t *am, u32 mask_type_index)
312 DBG0("RELEAS MTE index %d", mask_type_index);
313 ace_mask_type_entry_t *mte = pool_elt_at_index(am->ace_mask_type_pool, mask_type_index);
315 DBG0("RELEAS MTE index %d new refcount %d", mask_type_index, mte->refcount);
316 if (mte->refcount == 0) {
317 /* we are not using this entry anymore */
318 clib_memset(mte, 0xae, sizeof(*mte));
319 pool_put(am->ace_mask_type_pool, mte);
325 tm_assign_mask_type_index(acl_main_t *am, fa_5tuple_t *mask, int is_ip6, u32 lc_index)
327 u32 mask_type_index = ~0;
328 u32 for_mask_type_index = ~0;
329 ace_mask_type_entry_t *mte = 0;
331 /* look for existing mask comparable with the one in input */
333 hash_applied_mask_info_t **hash_applied_mask_info_vec = vec_elt_at_index(am->hash_applied_mask_info_vec_by_lc_index, lc_index);
334 hash_applied_mask_info_t *minfo;
336 if (vec_len(*hash_applied_mask_info_vec) > 0) {
337 for(order_index = vec_len((*hash_applied_mask_info_vec)) -1; order_index >= 0; order_index--) {
338 minfo = vec_elt_at_index((*hash_applied_mask_info_vec), order_index);
339 for_mask_type_index = minfo->mask_type_index;
340 mte = vec_elt_at_index(am->ace_mask_type_pool, for_mask_type_index);
341 if(first_mask_contains_second_mask(is_ip6, &mte->mask, mask)){
342 mask_type_index = (mte - am->ace_mask_type_pool);
343 lock_mask_type_index(am, mask_type_index);
349 if(~0 == mask_type_index) {
350 /* if no mask is found, then let's use a relaxed version of the original one, in order to be used by new ace_entries */
351 DBG( "TM-assigning mask type index-new one");
352 fa_5tuple_t relaxed_mask = *mask;
353 relax_tuple(&relaxed_mask, is_ip6, 0);
354 mask_type_index = assign_mask_type_index(am, &relaxed_mask);
356 hash_applied_mask_info_t **hash_applied_mask_info_vec = vec_elt_at_index(am->hash_applied_mask_info_vec_by_lc_index, lc_index);
358 int spot = vec_len((*hash_applied_mask_info_vec));
359 vec_validate((*hash_applied_mask_info_vec), spot);
360 minfo = vec_elt_at_index((*hash_applied_mask_info_vec), spot);
361 minfo->mask_type_index = mask_type_index;
362 minfo->num_entries = 0;
363 minfo->max_collisions = 0;
364 minfo->first_rule_index = ~0;
367 * We can use only 16 bits, since in the match there is only u16 field.
368 * Realistically, once you go to 64K of mask types, it is a huge
369 * problem anyway, so we might as well stop half way.
371 ASSERT(mask_type_index < 32768);
373 mte = am->ace_mask_type_pool + mask_type_index;
374 DBG0("TM-ASSIGN MTE index %d new refcount %d", mask_type_index, mte->refcount);
375 return mask_type_index;
380 fill_applied_hash_ace_kv(acl_main_t *am,
381 applied_hash_ace_entry_t **applied_hash_aces,
383 u32 new_index, clib_bihash_kv_48_8_t *kv)
385 fa_5tuple_t *kv_key = (fa_5tuple_t *)kv->key;
386 hash_acl_lookup_value_t *kv_val = (hash_acl_lookup_value_t *)&kv->value;
387 applied_hash_ace_entry_t *pae = vec_elt_at_index((*applied_hash_aces), new_index);
388 hash_acl_info_t *ha = vec_elt_at_index(am->hash_acl_infos, pae->acl_index);
390 /* apply the mask to ace key */
391 hash_ace_info_t *ace_info = vec_elt_at_index(ha->rules, pae->hash_ace_info_index);
392 ace_mask_type_entry_t *mte = vec_elt_at_index(am->ace_mask_type_pool, pae->mask_type_index);
394 u64 *pmatch = (u64 *) &ace_info->match;
395 u64 *pmask = (u64 *)&mte->mask;
396 u64 *pkey = (u64 *)kv->key;
398 *pkey++ = *pmatch++ & *pmask++;
399 *pkey++ = *pmatch++ & *pmask++;
400 *pkey++ = *pmatch++ & *pmask++;
401 *pkey++ = *pmatch++ & *pmask++;
402 *pkey++ = *pmatch++ & *pmask++;
403 *pkey++ = *pmatch++ & *pmask++;
405 kv_key->pkt.mask_type_index_lsb = pae->mask_type_index;
406 kv_key->pkt.lc_index = lc_index;
408 kv_val->applied_entry_index = new_index;
412 add_del_hashtable_entry(acl_main_t *am,
414 applied_hash_ace_entry_t **applied_hash_aces,
415 u32 index, int is_add)
417 clib_bihash_kv_48_8_t kv;
419 fill_applied_hash_ace_kv(am, applied_hash_aces, lc_index, index, &kv);
420 hashtable_add_del(am, &kv, is_add);
425 remake_hash_applied_mask_info_vec (acl_main_t * am,
426 applied_hash_ace_entry_t **
427 applied_hash_aces, u32 lc_index)
429 DBG0("remake applied hash mask info lc_index %d", lc_index);
430 hash_applied_mask_info_t *new_hash_applied_mask_info_vec =
431 vec_new (hash_applied_mask_info_t, 0);
433 hash_applied_mask_info_t *minfo;
435 for (i = 0; i < vec_len ((*applied_hash_aces)); i++)
437 applied_hash_ace_entry_t *pae =
438 vec_elt_at_index ((*applied_hash_aces), i);
440 /* check if mask_type_index is already there */
441 u32 new_pointer = vec_len (new_hash_applied_mask_info_vec);
443 for (search = 0; search < vec_len (new_hash_applied_mask_info_vec);
446 minfo = vec_elt_at_index (new_hash_applied_mask_info_vec, search);
447 if (minfo->mask_type_index == pae->mask_type_index)
451 vec_validate ((new_hash_applied_mask_info_vec), search);
452 minfo = vec_elt_at_index ((new_hash_applied_mask_info_vec), search);
453 if (search == new_pointer)
455 DBG0("remaking index %d", search);
456 minfo->mask_type_index = pae->mask_type_index;
457 minfo->num_entries = 0;
458 minfo->max_collisions = 0;
459 minfo->first_rule_index = ~0;
462 minfo->num_entries = minfo->num_entries + 1;
464 if (vec_len (pae->colliding_rules) > minfo->max_collisions)
465 minfo->max_collisions = vec_len (pae->colliding_rules);
467 if (minfo->first_rule_index > i)
468 minfo->first_rule_index = i;
471 hash_applied_mask_info_t **hash_applied_mask_info_vec =
472 vec_elt_at_index (am->hash_applied_mask_info_vec_by_lc_index, lc_index);
474 vec_free ((*hash_applied_mask_info_vec));
475 (*hash_applied_mask_info_vec) = new_hash_applied_mask_info_vec;
479 vec_del_collision_rule (collision_match_rule_t ** pvec,
480 u32 applied_entry_index)
484 while (i < _vec_len ((*pvec)))
486 collision_match_rule_t *cr = vec_elt_at_index ((*pvec), i);
487 if (cr->applied_entry_index == applied_entry_index)
489 /* vec_del1 ((*pvec), i) would be more efficient but would reorder the elements. */
490 vec_delete((*pvec), 1, i);
492 DBG0("vec_del_collision_rule deleting one at index %d", i);
503 acl_plugin_print_pae (vlib_main_t * vm, int j, applied_hash_ace_entry_t * pae);
506 del_colliding_rule (applied_hash_ace_entry_t ** applied_hash_aces,
507 u32 head_index, u32 applied_entry_index)
509 DBG0("DEL COLLIDING RULE: head_index %d applied index %d", head_index, applied_entry_index);
512 applied_hash_ace_entry_t *head_pae =
513 vec_elt_at_index ((*applied_hash_aces), head_index);
514 if (ACL_HASH_LOOKUP_DEBUG > 0)
515 acl_plugin_print_pae(acl_main.vlib_main, head_index, head_pae);
516 vec_del_collision_rule (&head_pae->colliding_rules, applied_entry_index);
517 if (vec_len(head_pae->colliding_rules) == 0) {
518 vec_free(head_pae->colliding_rules);
520 if (ACL_HASH_LOOKUP_DEBUG > 0)
521 acl_plugin_print_pae(acl_main.vlib_main, head_index, head_pae);
525 add_colliding_rule (acl_main_t * am,
526 applied_hash_ace_entry_t ** applied_hash_aces,
527 u32 head_index, u32 applied_entry_index)
529 applied_hash_ace_entry_t *head_pae =
530 vec_elt_at_index ((*applied_hash_aces), head_index);
531 applied_hash_ace_entry_t *pae =
532 vec_elt_at_index ((*applied_hash_aces), applied_entry_index);
533 DBG0("ADD COLLIDING RULE: head_index %d applied index %d", head_index, applied_entry_index);
534 if (ACL_HASH_LOOKUP_DEBUG > 0)
535 acl_plugin_print_pae(acl_main.vlib_main, head_index, head_pae);
537 collision_match_rule_t cr;
539 cr.acl_index = pae->acl_index;
540 cr.ace_index = pae->ace_index;
541 cr.acl_position = pae->acl_position;
542 cr.applied_entry_index = applied_entry_index;
543 cr.rule = am->acls[pae->acl_index].rules[pae->ace_index];
544 pae->collision_head_ae_index = head_index;
545 vec_add1 (head_pae->colliding_rules, cr);
546 if (ACL_HASH_LOOKUP_DEBUG > 0)
547 acl_plugin_print_pae(acl_main.vlib_main, head_index, head_pae);
551 activate_applied_ace_hash_entry(acl_main_t *am,
553 applied_hash_ace_entry_t **applied_hash_aces,
556 clib_bihash_kv_48_8_t kv;
557 ASSERT(new_index != ~0);
558 DBG("activate_applied_ace_hash_entry lc_index %d new_index %d", lc_index, new_index);
560 fill_applied_hash_ace_kv(am, applied_hash_aces, lc_index, new_index, &kv);
562 DBG("APPLY ADD KY: %016llx %016llx %016llx %016llx %016llx %016llx",
563 kv.key[0], kv.key[1], kv.key[2],
564 kv.key[3], kv.key[4], kv.key[5]);
566 clib_bihash_kv_48_8_t result;
567 hash_acl_lookup_value_t *result_val = (hash_acl_lookup_value_t *)&result.value;
568 int res = BV (clib_bihash_search) (&am->acl_lookup_hash, &kv, &result);
569 ASSERT(new_index != ~0);
570 ASSERT(new_index < vec_len((*applied_hash_aces)));
572 u32 first_index = result_val->applied_entry_index;
573 ASSERT(first_index != ~0);
574 ASSERT(first_index < vec_len((*applied_hash_aces)));
575 /* There already exists an entry or more. Append at the end. */
576 DBG("A key already exists, with applied entry index: %d", first_index);
577 add_colliding_rule(am, applied_hash_aces, first_index, new_index);
580 /* It's the very first entry */
581 hashtable_add_del(am, &kv, 1);
582 ASSERT(new_index != ~0);
583 add_colliding_rule(am, applied_hash_aces, new_index, new_index);
590 hash_acl_set_heap(acl_main_t *am)
592 if (0 == am->hash_lookup_mheap) {
593 am->hash_lookup_mheap = mheap_alloc_with_lock (0 /* use VM */ ,
594 am->hash_lookup_mheap_size,
596 if (0 == am->hash_lookup_mheap) {
597 clib_error("ACL plugin failed to allocate lookup heap of %U bytes",
598 format_memory_size, am->hash_lookup_mheap_size);
601 * DLMALLOC is being "helpful" in that it ignores the heap size parameter
602 * by default and tries to allocate the larger amount of memory.
604 * Pin the heap so this does not happen and if we run out of memory
605 * in this heap, we will bail out with "out of memory", rather than
606 * an obscure error sometime later.
608 mspace_disable_expand(am->hash_lookup_mheap);
610 void *oldheap = clib_mem_set_heap(am->hash_lookup_mheap);
615 acl_plugin_hash_acl_set_validate_heap(int on)
617 acl_main_t *am = &acl_main;
618 clib_mem_set_heap(hash_acl_set_heap(am));
622 acl_plugin_hash_acl_set_trace_heap(int on)
624 acl_main_t *am = &acl_main;
625 clib_mem_set_heap(hash_acl_set_heap(am));
629 assign_mask_type_index_to_pae(acl_main_t *am, u32 lc_index, int is_ip6, applied_hash_ace_entry_t *pae)
631 hash_acl_info_t *ha = vec_elt_at_index(am->hash_acl_infos, pae->acl_index);
632 hash_ace_info_t *ace_info = vec_elt_at_index(ha->rules, pae->hash_ace_info_index);
634 ace_mask_type_entry_t *mte;
637 * Start taking base_mask associated to ace, and essentially copy it.
638 * With TupleMerge we will assign a relaxed mask here.
640 mte = vec_elt_at_index(am->ace_mask_type_pool, ace_info->base_mask_type_index);
642 if (am->use_tuple_merge)
643 pae->mask_type_index = tm_assign_mask_type_index(am, &mask, is_ip6, lc_index);
645 pae->mask_type_index = assign_mask_type_index(am, &mask);
649 split_partition(acl_main_t *am, u32 first_index,
650 u32 lc_index, int is_ip6);
654 check_collision_count_and_maybe_split(acl_main_t *am, u32 lc_index, int is_ip6, u32 first_index)
656 applied_hash_ace_entry_t **applied_hash_aces = get_applied_hash_aces(am, lc_index);
657 applied_hash_ace_entry_t *first_pae = vec_elt_at_index((*applied_hash_aces), first_index);
658 if (vec_len(first_pae->colliding_rules) > am->tuple_merge_split_threshold) {
659 split_partition(am, first_index, lc_index, is_ip6);
664 hash_acl_apply(acl_main_t *am, u32 lc_index, int acl_index, u32 acl_position)
668 DBG0("HASH ACL apply: lc_index %d acl %d", lc_index, acl_index);
669 if (!am->acl_lookup_hash_initialized) {
670 BV (clib_bihash_init) (&am->acl_lookup_hash, "ACL plugin rule lookup bihash",
671 am->hash_lookup_hash_buckets, am->hash_lookup_hash_memory);
672 am->acl_lookup_hash_initialized = 1;
675 void *oldheap = hash_acl_set_heap(am);
676 vec_validate(am->hash_entry_vec_by_lc_index, lc_index);
677 vec_validate(am->hash_acl_infos, acl_index);
678 applied_hash_ace_entry_t **applied_hash_aces = get_applied_hash_aces(am, lc_index);
680 hash_acl_info_t *ha = vec_elt_at_index(am->hash_acl_infos, acl_index);
681 u32 **hash_acl_applied_lc_index = &ha->lc_index_list;
683 int base_offset = vec_len(*applied_hash_aces);
685 /* Update the bitmap of the mask types with which the lookup
686 needs to happen for the ACLs applied to this lc_index */
687 applied_hash_acl_info_t **applied_hash_acls = &am->applied_hash_acl_info_by_lc_index;
688 vec_validate((*applied_hash_acls), lc_index);
689 applied_hash_acl_info_t *pal = vec_elt_at_index((*applied_hash_acls), lc_index);
691 /* ensure the list of applied hash acls is initialized and add this acl# to it */
692 u32 index = vec_search(pal->applied_acls, acl_index);
694 clib_warning("BUG: trying to apply twice acl_index %d on lc_index %d, according to lc",
695 acl_index, lc_index);
698 vec_add1(pal->applied_acls, acl_index);
699 u32 index2 = vec_search((*hash_acl_applied_lc_index), lc_index);
701 clib_warning("BUG: trying to apply twice acl_index %d on lc_index %d, according to hash h-acl info",
702 acl_index, lc_index);
705 vec_add1((*hash_acl_applied_lc_index), lc_index);
708 * if the applied ACL is empty, the current code will cause a
709 * different behavior compared to current linear search: an empty ACL will
710 * simply fallthrough to the next ACL, or the default deny in the end.
712 * This is not a problem, because after vpp-dev discussion,
713 * the consensus was it should not be possible to apply the non-existent
714 * ACL, so the change adding this code also takes care of that.
718 vec_validate(am->hash_applied_mask_info_vec_by_lc_index, lc_index);
720 /* since we know (in case of no split) how much we expand, preallocate that space */
721 if (vec_len(ha->rules) > 0) {
722 int old_vec_len = vec_len(*applied_hash_aces);
723 vec_validate((*applied_hash_aces), old_vec_len + vec_len(ha->rules) - 1);
724 _vec_len((*applied_hash_aces)) = old_vec_len;
727 /* add the rules from the ACL to the hash table for lookup and append to the vector*/
728 for(i=0; i < vec_len(ha->rules); i++) {
730 * Expand the applied aces vector to fit a new entry.
731 * One by one not to upset split_partition() if it is called.
733 vec_resize((*applied_hash_aces), 1);
735 int is_ip6 = ha->rules[i].match.pkt.is_ip6;
736 u32 new_index = base_offset + i;
737 applied_hash_ace_entry_t *pae = vec_elt_at_index((*applied_hash_aces), new_index);
738 pae->acl_index = acl_index;
739 pae->ace_index = ha->rules[i].ace_index;
740 pae->acl_position = acl_position;
741 pae->action = ha->rules[i].action;
743 pae->hash_ace_info_index = i;
744 /* we might link it in later */
745 pae->collision_head_ae_index = ~0;
746 pae->colliding_rules = NULL;
747 pae->mask_type_index = ~0;
748 assign_mask_type_index_to_pae(am, lc_index, is_ip6, pae);
749 u32 first_index = activate_applied_ace_hash_entry(am, lc_index, applied_hash_aces, new_index);
750 if (am->use_tuple_merge)
751 check_collision_count_and_maybe_split(am, lc_index, is_ip6, first_index);
753 remake_hash_applied_mask_info_vec(am, applied_hash_aces, lc_index);
755 clib_mem_set_heap (oldheap);
759 find_head_applied_ace_index(applied_hash_ace_entry_t **applied_hash_aces, u32 curr_index)
761 ASSERT(curr_index != ~0);
762 applied_hash_ace_entry_t *pae = vec_elt_at_index((*applied_hash_aces), curr_index);
764 ASSERT(pae->collision_head_ae_index != ~0);
765 return pae->collision_head_ae_index;
769 set_collision_head_ae_index(applied_hash_ace_entry_t **applied_hash_aces, collision_match_rule_t *colliding_rules, u32 new_index)
771 collision_match_rule_t *cr;
772 vec_foreach(cr, colliding_rules) {
773 applied_hash_ace_entry_t *pae = vec_elt_at_index((*applied_hash_aces), cr->applied_entry_index);
774 pae->collision_head_ae_index = new_index;
779 move_applied_ace_hash_entry(acl_main_t *am,
781 applied_hash_ace_entry_t **applied_hash_aces,
782 u32 old_index, u32 new_index)
784 ASSERT(old_index != ~0);
785 ASSERT(new_index != ~0);
787 *vec_elt_at_index((*applied_hash_aces), new_index) = *vec_elt_at_index((*applied_hash_aces), old_index);
789 /* update the linkage and hash table if necessary */
790 applied_hash_ace_entry_t *pae = vec_elt_at_index((*applied_hash_aces), old_index);
791 applied_hash_ace_entry_t *new_pae = vec_elt_at_index((*applied_hash_aces), new_index);
793 if (ACL_HASH_LOOKUP_DEBUG > 0) {
794 clib_warning("Moving pae from %d to %d", old_index, new_index);
795 acl_plugin_print_pae(am->vlib_main, old_index, pae);
798 if (pae->collision_head_ae_index == old_index) {
799 /* first entry - so the hash points to it, update */
800 add_del_hashtable_entry(am, lc_index,
801 applied_hash_aces, new_index, 1);
803 if (new_pae->colliding_rules) {
804 /* update the information within the collision rule entry */
805 ASSERT(vec_len(new_pae->colliding_rules) > 0);
806 collision_match_rule_t *cr = vec_elt_at_index (new_pae->colliding_rules, 0);
807 ASSERT(cr->applied_entry_index == old_index);
808 cr->applied_entry_index = new_index;
809 set_collision_head_ae_index(applied_hash_aces, new_pae->colliding_rules, new_index);
811 /* find the index in the collision rule entry on the head element */
812 u32 head_index = find_head_applied_ace_index(applied_hash_aces, new_index);
813 ASSERT(head_index != ~0);
814 applied_hash_ace_entry_t *head_pae = vec_elt_at_index((*applied_hash_aces), head_index);
815 ASSERT(vec_len(head_pae->colliding_rules) > 0);
817 for (i=0; i<vec_len(head_pae->colliding_rules); i++) {
818 collision_match_rule_t *cr = vec_elt_at_index (head_pae->colliding_rules, i);
819 if (cr->applied_entry_index == old_index) {
820 cr->applied_entry_index = new_index;
823 if (ACL_HASH_LOOKUP_DEBUG > 0) {
824 clib_warning("Head pae at index %d after adjustment", head_index);
825 acl_plugin_print_pae(am->vlib_main, head_index, head_pae);
828 /* invalidate the old entry */
829 pae->collision_head_ae_index = ~0;
830 pae->colliding_rules = NULL;
834 deactivate_applied_ace_hash_entry(acl_main_t *am,
836 applied_hash_ace_entry_t **applied_hash_aces,
839 applied_hash_ace_entry_t *pae = vec_elt_at_index((*applied_hash_aces), old_index);
840 DBG("UNAPPLY DEACTIVATE: lc_index %d applied index %d", lc_index, old_index);
841 if (ACL_HASH_LOOKUP_DEBUG > 0) {
842 clib_warning("Deactivating pae at index %d", old_index);
843 acl_plugin_print_pae(am->vlib_main, old_index, pae);
846 if (pae->collision_head_ae_index != old_index) {
847 DBG("UNAPPLY = index %d has collision head %d", old_index, pae->collision_head_ae_index);
849 u32 head_index = find_head_applied_ace_index(applied_hash_aces, old_index);
850 ASSERT(head_index != ~0);
851 del_colliding_rule(applied_hash_aces, head_index, old_index);
854 /* It was the first entry. We need either to reset the hash entry or delete it */
855 /* delete our entry from the collision vector first */
856 del_colliding_rule(applied_hash_aces, old_index, old_index);
857 if (vec_len(pae->colliding_rules) > 0) {
858 u32 next_pae_index = pae->colliding_rules[0].applied_entry_index;
859 applied_hash_ace_entry_t *next_pae = vec_elt_at_index((*applied_hash_aces), next_pae_index);
860 /* Remove ourselves and transfer the ownership of the colliding rules vector */
861 next_pae->colliding_rules = pae->colliding_rules;
862 set_collision_head_ae_index(applied_hash_aces, next_pae->colliding_rules, next_pae_index);
863 add_del_hashtable_entry(am, lc_index,
864 applied_hash_aces, next_pae_index, 1);
866 /* no next entry, so just delete the entry in the hash table */
867 add_del_hashtable_entry(am, lc_index,
868 applied_hash_aces, old_index, 0);
871 DBG0("Releasing mask type index %d for pae index %d on lc_index %d", pae->mask_type_index, old_index, lc_index);
872 release_mask_type_index(am, pae->mask_type_index);
873 /* invalidate the old entry */
874 pae->mask_type_index = ~0;
875 pae->collision_head_ae_index = ~0;
876 /* always has to be 0 */
877 pae->colliding_rules = NULL;
882 hash_acl_unapply(acl_main_t *am, u32 lc_index, int acl_index)
886 DBG0("HASH ACL unapply: lc_index %d acl %d", lc_index, acl_index);
887 applied_hash_acl_info_t **applied_hash_acls = &am->applied_hash_acl_info_by_lc_index;
888 applied_hash_acl_info_t *pal = vec_elt_at_index((*applied_hash_acls), lc_index);
890 hash_acl_info_t *ha = vec_elt_at_index(am->hash_acl_infos, acl_index);
891 u32 **hash_acl_applied_lc_index = &ha->lc_index_list;
893 if (ACL_HASH_LOOKUP_DEBUG > 0) {
894 clib_warning("unapplying acl %d", acl_index);
895 acl_plugin_show_tables_mask_type();
896 acl_plugin_show_tables_acl_hash_info(acl_index);
897 acl_plugin_show_tables_applied_info(lc_index);
900 /* remove this acl# from the list of applied hash acls */
901 u32 index = vec_search(pal->applied_acls, acl_index);
903 clib_warning("BUG: trying to unapply unapplied acl_index %d on lc_index %d, according to lc",
904 acl_index, lc_index);
907 vec_del1(pal->applied_acls, index);
909 u32 index2 = vec_search((*hash_acl_applied_lc_index), lc_index);
911 clib_warning("BUG: trying to unapply twice acl_index %d on lc_index %d, according to h-acl info",
912 acl_index, lc_index);
915 vec_del1((*hash_acl_applied_lc_index), index2);
917 applied_hash_ace_entry_t **applied_hash_aces = get_applied_hash_aces(am, lc_index);
919 for(i=0; i < vec_len((*applied_hash_aces)); i++) {
920 if (vec_elt_at_index(*applied_hash_aces,i)->acl_index == acl_index) {
921 DBG("Found applied ACL#%d at applied index %d", acl_index, i);
925 if (vec_len((*applied_hash_aces)) <= i) {
926 DBG("Did not find applied ACL#%d at lc_index %d", acl_index, lc_index);
927 /* we went all the way without finding any entries. Probably a list was empty. */
931 void *oldheap = hash_acl_set_heap(am);
933 int tail_offset = base_offset + vec_len(ha->rules);
934 int tail_len = vec_len((*applied_hash_aces)) - tail_offset;
935 DBG("base_offset: %d, tail_offset: %d, tail_len: %d", base_offset, tail_offset, tail_len);
937 for(i=0; i < vec_len(ha->rules); i ++) {
938 deactivate_applied_ace_hash_entry(am, lc_index,
939 applied_hash_aces, base_offset + i);
941 for(i=0; i < tail_len; i ++) {
942 /* move the entry at tail offset to base offset */
943 /* that is, from (tail_offset+i) -> (base_offset+i) */
944 DBG0("UNAPPLY MOVE: lc_index %d, applied index %d -> %d", lc_index, tail_offset+i, base_offset + i);
945 move_applied_ace_hash_entry(am, lc_index, applied_hash_aces, tail_offset + i, base_offset + i);
947 /* trim the end of the vector */
948 _vec_len((*applied_hash_aces)) -= vec_len(ha->rules);
950 remake_hash_applied_mask_info_vec(am, applied_hash_aces, lc_index);
952 if (vec_len((*applied_hash_aces)) == 0) {
953 vec_free((*applied_hash_aces));
956 clib_mem_set_heap (oldheap);
960 * Create the applied ACEs and update the hash table,
961 * taking into account that the ACL may not be the last
962 * in the vector of applied ACLs.
964 * For now, walk from the end of the vector and unapply the ACLs,
965 * then apply the one in question and reapply the rest.
969 hash_acl_reapply(acl_main_t *am, u32 lc_index, int acl_index)
971 acl_lookup_context_t *acontext = pool_elt_at_index(am->acl_lookup_contexts, lc_index);
972 u32 **applied_acls = &acontext->acl_indices;
974 int start_index = vec_search((*applied_acls), acl_index);
976 DBG0("Start index for acl %d in lc_index %d is %d", acl_index, lc_index, start_index);
978 * This function is called after we find out the lc_index where ACL is applied.
979 * If the by-lc_index vector does not have the ACL#, then it's a bug.
981 ASSERT(start_index < vec_len(*applied_acls));
983 /* unapply all the ACLs at the tail side, up to the current one */
984 for(i = vec_len(*applied_acls) - 1; i > start_index; i--) {
985 hash_acl_unapply(am, lc_index, *vec_elt_at_index(*applied_acls, i));
987 for(i = start_index; i < vec_len(*applied_acls); i++) {
988 hash_acl_apply(am, lc_index, *vec_elt_at_index(*applied_acls, i), i);
993 make_ip6_address_mask(ip6_address_t *addr, u8 prefix_len)
995 ip6_address_mask_from_width(addr, prefix_len);
999 /* Maybe should be moved into the core somewhere */
1001 ip4_address_mask_from_width (ip4_address_t * a, u32 width)
1003 int i, byte, bit, bitnum;
1004 ASSERT (width <= 32);
1005 clib_memset (a, 0, sizeof (a[0]));
1006 for (i = 0; i < width; i++)
1008 bitnum = (7 - (i & 7));
1011 a->as_u8[byte] |= bit;
1017 make_ip4_address_mask(ip4_address_t *addr, u8 prefix_len)
1019 ip4_address_mask_from_width(addr, prefix_len);
1023 make_port_mask(u16 *portmask, u16 port_first, u16 port_last)
1025 if (port_first == port_last) {
1027 /* single port is representable by masked value */
1036 make_mask_and_match_from_rule(fa_5tuple_t *mask, acl_rule_t *r, hash_ace_info_t *hi)
1038 clib_memset(mask, 0, sizeof(*mask));
1039 clib_memset(&hi->match, 0, sizeof(hi->match));
1040 hi->action = r->is_permit;
1042 /* we will need to be matching based on lc_index and mask_type_index when applied */
1043 mask->pkt.lc_index = ~0;
1044 /* we will assign the match of mask_type_index later when we find it*/
1045 mask->pkt.mask_type_index_lsb = ~0;
1047 mask->pkt.is_ip6 = 1;
1048 hi->match.pkt.is_ip6 = r->is_ipv6;
1050 make_ip6_address_mask(&mask->ip6_addr[0], r->src_prefixlen);
1051 hi->match.ip6_addr[0] = r->src.ip6;
1052 make_ip6_address_mask(&mask->ip6_addr[1], r->dst_prefixlen);
1053 hi->match.ip6_addr[1] = r->dst.ip6;
1055 clib_memset(hi->match.l3_zero_pad, 0, sizeof(hi->match.l3_zero_pad));
1056 make_ip4_address_mask(&mask->ip4_addr[0], r->src_prefixlen);
1057 hi->match.ip4_addr[0] = r->src.ip4;
1058 make_ip4_address_mask(&mask->ip4_addr[1], r->dst_prefixlen);
1059 hi->match.ip4_addr[1] = r->dst.ip4;
1062 if (r->proto != 0) {
1063 mask->l4.proto = ~0; /* L4 proto needs to be matched */
1064 hi->match.l4.proto = r->proto;
1066 /* Calculate the src/dst port masks and make the src/dst port matches accordingly */
1067 make_port_mask(&mask->l4.port[0], r->src_port_or_type_first, r->src_port_or_type_last);
1068 hi->match.l4.port[0] = r->src_port_or_type_first & mask->l4.port[0];
1070 make_port_mask(&mask->l4.port[1], r->dst_port_or_code_first, r->dst_port_or_code_last);
1071 hi->match.l4.port[1] = r->dst_port_or_code_first & mask->l4.port[1];
1072 /* L4 info must be valid in order to match */
1073 mask->pkt.l4_valid = 1;
1074 hi->match.pkt.l4_valid = 1;
1075 /* And we must set the mask to check that it is an initial fragment */
1076 mask->pkt.is_nonfirst_fragment = 1;
1077 hi->match.pkt.is_nonfirst_fragment = 0;
1078 if ((r->proto == IPPROTO_TCP) && (r->tcp_flags_mask != 0)) {
1079 /* if we want to match on TCP flags, they must be masked off as well */
1080 mask->pkt.tcp_flags = r->tcp_flags_mask;
1081 hi->match.pkt.tcp_flags = r->tcp_flags_value;
1082 /* and the flags need to be present within the packet being matched */
1083 mask->pkt.tcp_flags_valid = 1;
1084 hi->match.pkt.tcp_flags_valid = 1;
1087 /* Sanitize the mask and the match */
1088 u64 *pmask = (u64 *)mask;
1089 u64 *pmatch = (u64 *)&hi->match;
1091 for(j=0; j<6; j++) {
1092 pmatch[j] = pmatch[j] & pmask[j];
1097 int hash_acl_exists(acl_main_t *am, int acl_index)
1099 if (acl_index >= vec_len(am->hash_acl_infos))
1102 hash_acl_info_t *ha = vec_elt_at_index(am->hash_acl_infos, acl_index);
1103 return ha->hash_acl_exists;
1106 void hash_acl_add(acl_main_t *am, int acl_index)
1108 void *oldheap = hash_acl_set_heap(am);
1109 DBG("HASH ACL add : %d", acl_index);
1111 acl_rule_t *acl_rules = am->acls[acl_index].rules;
1112 vec_validate(am->hash_acl_infos, acl_index);
1113 hash_acl_info_t *ha = vec_elt_at_index(am->hash_acl_infos, acl_index);
1114 clib_memset(ha, 0, sizeof(*ha));
1115 ha->hash_acl_exists = 1;
1117 /* walk the newly added ACL entries and ensure that for each of them there
1118 is a mask type, increment a reference count for that mask type */
1120 /* avoid small requests by preallocating the entire vector before running the additions */
1121 if (vec_len(acl_rules) > 0) {
1122 vec_validate(ha->rules, vec_len(acl_rules)-1);
1123 vec_reset_length(ha->rules);
1126 for(i=0; i < vec_len(acl_rules); i++) {
1127 hash_ace_info_t ace_info;
1129 clib_memset(&ace_info, 0, sizeof(ace_info));
1130 ace_info.acl_index = acl_index;
1131 ace_info.ace_index = i;
1133 make_mask_and_match_from_rule(&mask, &acl_rules[i], &ace_info);
1134 mask.pkt.flags_reserved = 0b000;
1135 ace_info.base_mask_type_index = assign_mask_type_index(am, &mask);
1136 /* assign the mask type index for matching itself */
1137 ace_info.match.pkt.mask_type_index_lsb = ace_info.base_mask_type_index;
1138 DBG("ACE: %d mask_type_index: %d", i, ace_info.base_mask_type_index);
1139 vec_add1(ha->rules, ace_info);
1142 * if an ACL is applied somewhere, fill the corresponding lookup data structures.
1143 * We need to take care if the ACL is not the last one in the vector of ACLs applied to the interface.
1145 if (acl_index < vec_len(am->lc_index_vec_by_acl)) {
1147 vec_foreach(lc_index, am->lc_index_vec_by_acl[acl_index]) {
1148 hash_acl_reapply(am, *lc_index, acl_index);
1151 clib_mem_set_heap (oldheap);
1154 void hash_acl_delete(acl_main_t *am, int acl_index)
1156 void *oldheap = hash_acl_set_heap(am);
1157 DBG0("HASH ACL delete : %d", acl_index);
1159 * If the ACL is applied somewhere, remove the references of it (call hash_acl_unapply)
1160 * this is a different behavior from the linear lookup where an empty ACL is "deny all",
1162 * However, following vpp-dev discussion the ACL that is referenced elsewhere
1163 * should not be possible to delete, and the change adding this also adds
1164 * the safeguards to that respect, so this is not a problem.
1166 * The part to remember is that this routine is called in process of reapplication
1167 * during the acl_add_replace() API call - the old acl ruleset is deleted, then
1168 * the new one is added, without the change in the applied ACLs - so this case
1169 * has to be handled.
1171 hash_acl_info_t *ha = vec_elt_at_index(am->hash_acl_infos, acl_index);
1172 u32 *lc_list_copy = 0;
1175 lc_list_copy = vec_dup(ha->lc_index_list);
1176 vec_foreach(lc_index, lc_list_copy) {
1177 hash_acl_unapply(am, *lc_index, acl_index);
1179 vec_free(lc_list_copy);
1181 vec_free(ha->lc_index_list);
1183 /* walk the mask types for the ACL about-to-be-deleted, and decrease
1184 * the reference count, possibly freeing up some of them */
1186 for(i=0; i < vec_len(ha->rules); i++) {
1187 release_mask_type_index(am, ha->rules[i].base_mask_type_index);
1189 ha->hash_acl_exists = 0;
1190 vec_free(ha->rules);
1191 clib_mem_set_heap (oldheap);
1196 show_hash_acl_hash (vlib_main_t * vm, acl_main_t *am, u32 verbose)
1198 vlib_cli_output(vm, "\nACL lookup hash table:\n%U\n",
1199 BV (format_bihash), &am->acl_lookup_hash, verbose);
1203 acl_plugin_show_tables_mask_type (void)
1205 acl_main_t *am = &acl_main;
1206 vlib_main_t *vm = am->vlib_main;
1207 ace_mask_type_entry_t *mte;
1209 vlib_cli_output (vm, "Mask-type entries:");
1211 pool_foreach(mte, am->ace_mask_type_pool,
1213 vlib_cli_output(vm, " %3d: %016llx %016llx %016llx %016llx %016llx %016llx refcount %d",
1214 mte - am->ace_mask_type_pool,
1215 mte->mask.kv_40_8.key[0], mte->mask.kv_40_8.key[1], mte->mask.kv_40_8.key[2],
1216 mte->mask.kv_40_8.key[3], mte->mask.kv_40_8.key[4], mte->mask.kv_40_8.value, mte->refcount);
1222 acl_plugin_show_tables_acl_hash_info (u32 acl_index)
1224 acl_main_t *am = &acl_main;
1225 vlib_main_t *vm = am->vlib_main;
1228 vlib_cli_output (vm, "Mask-ready ACL representations\n");
1229 for (i = 0; i < vec_len (am->hash_acl_infos); i++)
1231 if ((acl_index != ~0) && (acl_index != i))
1235 hash_acl_info_t *ha = &am->hash_acl_infos[i];
1236 vlib_cli_output (vm, "acl-index %u bitmask-ready layout\n", i);
1237 vlib_cli_output (vm, " applied lc_index list: %U\n",
1238 format_vec32, ha->lc_index_list, "%d");
1239 for (j = 0; j < vec_len (ha->rules); j++)
1241 hash_ace_info_t *pa = &ha->rules[j];
1242 m = (u64 *) & pa->match;
1243 vlib_cli_output (vm,
1244 " %4d: %016llx %016llx %016llx %016llx %016llx %016llx base mask index %d acl %d rule %d action %d\n",
1245 j, m[0], m[1], m[2], m[3], m[4], m[5],
1246 pa->base_mask_type_index, pa->acl_index, pa->ace_index,
1253 acl_plugin_print_colliding_rule (vlib_main_t * vm, int j, collision_match_rule_t *cr) {
1255 " %4d: acl %d ace %d acl pos %d pae index: %d",
1256 j, cr->acl_index, cr->ace_index, cr->acl_position, cr->applied_entry_index);
1260 acl_plugin_print_pae (vlib_main_t * vm, int j, applied_hash_ace_entry_t * pae)
1262 vlib_cli_output (vm,
1263 " %4d: acl %d rule %d action %d bitmask-ready rule %d mask type index: %d colliding_rules: %d collision_head_ae_idx %d hitcount %lld acl_pos: %d",
1264 j, pae->acl_index, pae->ace_index, pae->action,
1265 pae->hash_ace_info_index, pae->mask_type_index, vec_len(pae->colliding_rules), pae->collision_head_ae_index,
1266 pae->hitcount, pae->acl_position);
1268 for(jj=0; jj<vec_len(pae->colliding_rules); jj++)
1269 acl_plugin_print_colliding_rule(vm, jj, vec_elt_at_index(pae->colliding_rules, jj));
1273 acl_plugin_print_applied_mask_info (vlib_main_t * vm, int j, hash_applied_mask_info_t *mi)
1275 vlib_cli_output (vm,
1276 " %4d: mask type index %d first rule index %d num_entries %d max_collisions %d",
1277 j, mi->mask_type_index, mi->first_rule_index, mi->num_entries, mi->max_collisions);
1281 acl_plugin_show_tables_applied_info (u32 lc_index)
1283 acl_main_t *am = &acl_main;
1284 vlib_main_t *vm = am->vlib_main;
1286 vlib_cli_output (vm, "Applied lookup entries for lookup contexts");
1289 (lci < vec_len(am->applied_hash_acl_info_by_lc_index)); lci++)
1291 if ((lc_index != ~0) && (lc_index != lci))
1295 vlib_cli_output (vm, "lc_index %d:", lci);
1296 if (lci < vec_len (am->applied_hash_acl_info_by_lc_index))
1298 applied_hash_acl_info_t *pal =
1299 &am->applied_hash_acl_info_by_lc_index[lci];
1300 vlib_cli_output (vm, " applied acls: %U", format_vec32,
1301 pal->applied_acls, "%d");
1303 if (lci < vec_len (am->hash_applied_mask_info_vec_by_lc_index))
1305 vlib_cli_output (vm, " applied mask info entries:");
1307 j < vec_len (am->hash_applied_mask_info_vec_by_lc_index[lci]);
1310 acl_plugin_print_applied_mask_info (vm, j,
1311 &am->hash_applied_mask_info_vec_by_lc_index
1315 if (lci < vec_len (am->hash_entry_vec_by_lc_index))
1317 vlib_cli_output (vm, " lookup applied entries:");
1319 j < vec_len (am->hash_entry_vec_by_lc_index[lci]);
1322 acl_plugin_print_pae (vm, j,
1323 &am->hash_entry_vec_by_lc_index
1331 acl_plugin_show_tables_bihash (u32 show_bihash_verbose)
1333 acl_main_t *am = &acl_main;
1334 vlib_main_t *vm = am->vlib_main;
1335 show_hash_acl_hash (vm, am, show_bihash_verbose);
1339 * Split of the partition needs to happen when the collision count
1340 * goes over a specified threshold.
1342 * This is a signal that we ignored too many bits in
1343 * mT and we need to split the table into two tables. We select
1344 * all of the colliding rules L and find their maximum common
1345 * tuple mL. Normally mL is specific enough to hash L with few
1346 * or no collisions. We then create a new table T2 with tuple mL
1347 * and transfer all compatible rules from T to T2. If mL is not
1348 * specific enough, we find the field with the biggest difference
1349 * between the minimum and maximum tuple lengths for all of
1350 * the rules in L and set that field to be the average of those two
1351 * values. We then transfer all compatible rules as before. This
1352 * guarantees that some rules from L will move and that T2 will
1353 * have a smaller number of collisions than T did.
1358 ensure_ip6_min_addr (ip6_address_t * min_addr, ip6_address_t * mask_addr)
1361 (clib_net_to_host_u64 (mask_addr->as_u64[0]) <
1362 clib_net_to_host_u64 (min_addr->as_u64[0]))
1364 ((clib_net_to_host_u64 (mask_addr->as_u64[0]) ==
1365 clib_net_to_host_u64 (min_addr->as_u64[0]))
1366 && (clib_net_to_host_u64 (mask_addr->as_u64[1]) <
1367 clib_net_to_host_u64 (min_addr->as_u64[1])));
1370 min_addr->as_u64[0] = mask_addr->as_u64[0];
1371 min_addr->as_u64[1] = mask_addr->as_u64[1];
1376 ensure_ip6_max_addr (ip6_address_t * max_addr, ip6_address_t * mask_addr)
1379 (clib_net_to_host_u64 (mask_addr->as_u64[0]) >
1380 clib_net_to_host_u64 (max_addr->as_u64[0]))
1382 ((clib_net_to_host_u64 (mask_addr->as_u64[0]) ==
1383 clib_net_to_host_u64 (max_addr->as_u64[0]))
1384 && (clib_net_to_host_u64 (mask_addr->as_u64[1]) >
1385 clib_net_to_host_u64 (max_addr->as_u64[1])));
1388 max_addr->as_u64[0] = mask_addr->as_u64[0];
1389 max_addr->as_u64[1] = mask_addr->as_u64[1];
1394 ensure_ip4_min_addr (ip4_address_t * min_addr, ip4_address_t * mask_addr)
1397 (clib_net_to_host_u32 (mask_addr->as_u32) <
1398 clib_net_to_host_u32 (min_addr->as_u32));
1400 min_addr->as_u32 = mask_addr->as_u32;
1404 ensure_ip4_max_addr (ip4_address_t * max_addr, ip4_address_t * mask_addr)
1407 (clib_net_to_host_u32 (mask_addr->as_u32) >
1408 clib_net_to_host_u32 (max_addr->as_u32));
1410 max_addr->as_u32 = mask_addr->as_u32;
1424 split_partition(acl_main_t *am, u32 first_index,
1425 u32 lc_index, int is_ip6){
1426 DBG( "TM-split_partition - first_entry:%d", first_index);
1427 applied_hash_ace_entry_t **applied_hash_aces = get_applied_hash_aces(am, lc_index);
1428 ace_mask_type_entry_t *mte;
1429 fa_5tuple_t the_min_tuple, *min_tuple = &the_min_tuple;
1430 fa_5tuple_t the_max_tuple, *max_tuple = &the_max_tuple;
1431 applied_hash_ace_entry_t *pae = vec_elt_at_index((*applied_hash_aces), first_index);
1432 hash_acl_info_t *ha = vec_elt_at_index(am->hash_acl_infos, pae->acl_index);
1433 hash_ace_info_t *ace_info;
1434 u32 coll_mask_type_index = pae->mask_type_index;
1435 clib_memset(&the_min_tuple, 0, sizeof(the_min_tuple));
1436 clib_memset(&the_max_tuple, 0, sizeof(the_max_tuple));
1439 collision_match_rule_t *colliding_rules = pae->colliding_rules;
1440 u64 collisions = vec_len(pae->colliding_rules);
1441 for(i=0; i<collisions; i++){
1442 /* reload the hash acl info as it might be a different ACL# */
1443 pae = vec_elt_at_index((*applied_hash_aces), colliding_rules[i].applied_entry_index);
1444 ha = vec_elt_at_index(am->hash_acl_infos, pae->acl_index);
1446 DBG( "TM-collision: base_ace:%d (ace_mask:%d, first_collision_mask:%d)",
1447 pae->ace_index, pae->mask_type_index, coll_mask_type_index);
1449 ace_info = vec_elt_at_index(ha->rules, pae->hash_ace_info_index);
1450 mte = vec_elt_at_index(am->ace_mask_type_pool, ace_info->base_mask_type_index);
1451 fa_5tuple_t *mask = &mte->mask;
1453 if(pae->mask_type_index != coll_mask_type_index) continue;
1454 /* Computing min_mask and max_mask for colliding rules */
1456 clib_memcpy_fast(min_tuple, mask, sizeof(fa_5tuple_t));
1457 clib_memcpy_fast(max_tuple, mask, sizeof(fa_5tuple_t));
1462 ensure_ip6_min_addr(&min_tuple->ip6_addr[j], &mask->ip6_addr[j]);
1464 ensure_ip4_min_addr(&min_tuple->ip4_addr[j], &mask->ip4_addr[j]);
1466 if ((mask->l4.port[j] < min_tuple->l4.port[j]))
1467 min_tuple->l4.port[j] = mask->l4.port[j];
1470 if ((mask->l4.proto < min_tuple->l4.proto))
1471 min_tuple->l4.proto = mask->l4.proto;
1473 if(mask->pkt.as_u64 < min_tuple->pkt.as_u64)
1474 min_tuple->pkt.as_u64 = mask->pkt.as_u64;
1479 ensure_ip6_max_addr(&max_tuple->ip6_addr[j], &mask->ip6_addr[j]);
1481 ensure_ip4_max_addr(&max_tuple->ip4_addr[j], &mask->ip4_addr[j]);
1483 if ((mask->l4.port[j] > max_tuple->l4.port[j]))
1484 max_tuple->l4.port[j] = mask->l4.port[j];
1487 if ((mask->l4.proto < max_tuple->l4.proto))
1488 max_tuple->l4.proto = mask->l4.proto;
1490 if(mask->pkt.as_u64 > max_tuple->pkt.as_u64)
1491 max_tuple->pkt.as_u64 = mask->pkt.as_u64;
1495 /* Computing field with max difference between (min/max)_mask */
1496 int best_dim=-1, best_delta=0, delta=0;
1498 /* SRC_addr dimension */
1502 delta += count_bits(max_tuple->ip6_addr[0].as_u64[i]) - count_bits(min_tuple->ip6_addr[0].as_u64[i]);
1505 delta += count_bits(max_tuple->ip4_addr[0].as_u32) - count_bits(min_tuple->ip4_addr[0].as_u32);
1507 if(delta > best_delta){
1509 best_dim = DIM_SRC_ADDR;
1512 /* DST_addr dimension */
1517 delta += count_bits(max_tuple->ip6_addr[1].as_u64[i]) - count_bits(min_tuple->ip6_addr[1].as_u64[i]);
1520 delta += count_bits(max_tuple->ip4_addr[1].as_u32) - count_bits(min_tuple->ip4_addr[1].as_u32);
1522 if(delta > best_delta){
1524 best_dim = DIM_DST_ADDR;
1527 /* SRC_port dimension */
1528 delta = count_bits(max_tuple->l4.port[0]) - count_bits(min_tuple->l4.port[0]);
1529 if(delta > best_delta){
1531 best_dim = DIM_SRC_PORT;
1534 /* DST_port dimension */
1535 delta = count_bits(max_tuple->l4.port[1]) - count_bits(min_tuple->l4.port[1]);
1536 if(delta > best_delta){
1538 best_dim = DIM_DST_PORT;
1541 /* Proto dimension */
1542 delta = count_bits(max_tuple->l4.proto) - count_bits(min_tuple->l4.proto);
1543 if(delta > best_delta){
1545 best_dim = DIM_PROTO;
1548 int shifting = 0; //, ipv4_block = 0;
1551 shifting = (best_delta)/2; // FIXME IPV4-only
1552 // ipv4_block = count_bits(max_tuple->ip4_addr[0].as_u32);
1553 min_tuple->ip4_addr[0].as_u32 =
1554 clib_host_to_net_u32((clib_net_to_host_u32(max_tuple->ip4_addr[0].as_u32) << (shifting))&0xFFFFFFFF);
1558 shifting = (best_delta)/2;
1560 ipv4_block = count_bits(max_tuple->addr[1].as_u64[1]);
1561 if(ipv4_block > shifting)
1562 min_tuple->addr[1].as_u64[1] =
1563 clib_host_to_net_u64((clib_net_to_host_u64(max_tuple->addr[1].as_u64[1]) << (shifting))&0xFFFFFFFF);
1565 shifting = shifting - ipv4_block;
1566 min_tuple->addr[1].as_u64[1] = 0;
1567 min_tuple->addr[1].as_u64[0] =
1568 clib_host_to_net_u64((clib_net_to_host_u64(max_tuple->addr[1].as_u64[0]) << (shifting))&0xFFFFFFFF);
1571 min_tuple->ip4_addr[1].as_u32 =
1572 clib_host_to_net_u32((clib_net_to_host_u32(max_tuple->ip4_addr[1].as_u32) << (shifting))&0xFFFFFFFF);
1575 case DIM_SRC_PORT: min_tuple->l4.port[0] = max_tuple->l4.port[0] << (best_delta)/2;
1577 case DIM_DST_PORT: min_tuple->l4.port[1] = max_tuple->l4.port[1] << (best_delta)/2;
1579 case DIM_PROTO: min_tuple->l4.proto = max_tuple->l4.proto << (best_delta)/2;
1581 default: relax_tuple(min_tuple, is_ip6, 1);
1585 min_tuple->pkt.is_nonfirst_fragment = 0;
1586 u32 new_mask_type_index = assign_mask_type_index(am, min_tuple);
1588 hash_applied_mask_info_t **hash_applied_mask_info_vec = vec_elt_at_index(am->hash_applied_mask_info_vec_by_lc_index, lc_index);
1590 hash_applied_mask_info_t *minfo;
1591 //search in order pool if mask_type_index is already there
1593 for (search=0; search < vec_len((*hash_applied_mask_info_vec)); search++){
1594 minfo = vec_elt_at_index((*hash_applied_mask_info_vec), search);
1595 if(minfo->mask_type_index == new_mask_type_index)
1599 vec_validate((*hash_applied_mask_info_vec), search);
1600 minfo = vec_elt_at_index((*hash_applied_mask_info_vec), search);
1601 minfo->mask_type_index = new_mask_type_index;
1602 minfo->num_entries = 0;
1603 minfo->max_collisions = 0;
1604 minfo->first_rule_index = ~0;
1606 DBG( "TM-split_partition - mask type index-assigned!! -> %d", new_mask_type_index);
1608 if(coll_mask_type_index == new_mask_type_index){
1609 //vlib_cli_output(vm, "TM-There are collisions over threshold, but i'm not able to split! %d %d", coll_mask_type_index, new_mask_type_index);
1614 /* populate new partition */
1615 DBG( "TM-Populate new partition");
1616 u32 r_ace_index = first_index;
1617 int repopulate_count = 0;
1619 collision_match_rule_t *temp_colliding_rules = vec_dup(colliding_rules);
1620 collisions = vec_len(temp_colliding_rules);
1622 for(i=0; i<collisions; i++){
1624 r_ace_index = temp_colliding_rules[i].applied_entry_index;
1626 applied_hash_ace_entry_t *pop_pae = vec_elt_at_index((*applied_hash_aces), r_ace_index);
1627 ha = vec_elt_at_index(am->hash_acl_infos, pop_pae->acl_index);
1628 DBG( "TM-Population-collision: base_ace:%d (ace_mask:%d, first_collision_mask:%d)",
1629 pop_pae->ace_index, pop_pae->mask_type_index, coll_mask_type_index);
1631 ASSERT(pop_pae->mask_type_index == coll_mask_type_index);
1633 ace_info = vec_elt_at_index(ha->rules, pop_pae->hash_ace_info_index);
1634 mte = vec_elt_at_index(am->ace_mask_type_pool, ace_info->base_mask_type_index);
1636 //mte = vec_elt_at_index(am->ace_mask_type_pool, pop_pae->mask_type_index);
1637 fa_5tuple_t *pop_mask = &mte->mask;
1639 if(!first_mask_contains_second_mask(is_ip6, min_tuple, pop_mask)) continue;
1640 DBG( "TM-new partition can insert -> applied_ace:%d", r_ace_index);
1642 //delete and insert in new format
1643 deactivate_applied_ace_hash_entry(am, lc_index, applied_hash_aces, r_ace_index);
1645 /* insert the new entry */
1646 pop_pae->mask_type_index = new_mask_type_index;
1647 /* The very first repopulation gets the lock by virtue of a new mask being created above */
1648 if (++repopulate_count > 1)
1649 lock_mask_type_index(am, new_mask_type_index);
1651 activate_applied_ace_hash_entry(am, lc_index, applied_hash_aces, r_ace_index);
1654 vec_free(temp_colliding_rules);
1656 DBG( "TM-Populate new partition-END");
1657 DBG( "TM-split_partition - END");