2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
15 #ifndef __included_vnet_classify_h__
16 #define __included_vnet_classify_h__
20 #include <vlib/vlib.h>
21 #include <vnet/vnet.h>
22 #include <vnet/pg/pg.h>
23 #include <vnet/ethernet/ethernet.h>
24 #include <vnet/ethernet/packet.h>
25 #include <vnet/ip/ip_packet.h>
26 #include <vnet/ip/ip4_packet.h>
27 #include <vnet/ip/ip6_packet.h>
29 #include <vnet/l2/l2_input.h>
30 #include <vnet/l2/feat_bitmap.h>
31 #include <vnet/api_errno.h> /* for API error numbers */
33 #include <vppinfra/error.h>
34 #include <vppinfra/hash.h>
35 #include <vppinfra/cache.h>
36 #include <vppinfra/xxhash.h>
38 extern vlib_node_registration_t ip4_classify_node;
39 extern vlib_node_registration_t ip6_classify_node;
41 #define CLASSIFY_TRACE 0
43 #if !defined( __aarch64__) && !defined(__arm__)
44 #define CLASSIFY_USE_SSE //Allow usage of SSE operations
47 #define U32X4_ALIGNED(p) PREDICT_TRUE((((intptr_t)p) & 0xf) == 0)
50 * Classify table option to process packets
51 * CLASSIFY_FLAG_USE_CURR_DATA:
52 * - classify packets starting from VPP node’s current data pointer
54 #define CLASSIFY_FLAG_USE_CURR_DATA 1
57 * Classify session action
58 * CLASSIFY_ACTION_SET_IP4_FIB_INDEX:
59 * - Classified IP packets will be looked up
60 * from the specified ipv4 fib table
61 * CLASSIFY_ACTION_SET_IP6_FIB_INDEX:
62 * - Classified IP packets will be looked up
63 * from the specified ipv6 fib table
65 #define CLASSIFY_ACTION_SET_IP4_FIB_INDEX 1
66 #define CLASSIFY_ACTION_SET_IP6_FIB_INDEX 2
68 struct _vnet_classify_main;
69 typedef struct _vnet_classify_main vnet_classify_main_t;
71 #define foreach_size_in_u32x4 \
78 typedef CLIB_PACKED(struct _vnet_classify_entry {
79 /* Graph node next index */
82 /* put into vnet_buffer(b)->l2_classfy.opaque_index */
86 /* advance on hit, note it's a signed quantity... */
92 /* Really only need 1 bit */
94 #define VNET_CLASSIFY_ENTRY_FREE (1<<0)
99 /* Hit counter, last heard time */
102 struct _vnet_classify_entry * next_free;
107 /* Must be aligned to a 16-octet boundary */
109 }) vnet_classify_entry_t;
111 static inline int vnet_classify_entry_is_free (vnet_classify_entry_t * e)
113 return e->flags & VNET_CLASSIFY_ENTRY_FREE;
116 static inline int vnet_classify_entry_is_busy (vnet_classify_entry_t * e)
118 return ((e->flags & VNET_CLASSIFY_ENTRY_FREE) == 0);
121 /* Need these to con the vector allocator */
123 typedef CLIB_PACKED(struct { \
127 }) vnet_classify_entry_##size##_t;
128 foreach_size_in_u32x4;
141 } vnet_classify_bucket_t;
144 /* Mask to apply after skipping N vectors */
146 /* Buckets and entries */
147 vnet_classify_bucket_t * buckets;
148 vnet_classify_entry_t * entries;
150 /* Config parameters */
156 int entries_per_page;
158 u32 current_data_flag;
159 int current_data_offset;
161 /* Index of next table to try */
162 u32 next_table_index;
164 /* Miss next index, return if next_table_index = 0 */
167 /* Per-bucket working copies, one per thread */
168 vnet_classify_entry_t ** working_copies;
169 int *working_copy_lengths;
170 vnet_classify_bucket_t saved_bucket;
172 /* Free entry freelists */
173 vnet_classify_entry_t **freelists;
177 /* Private allocation arena, protected by the writer lock */
180 /* Writer (only) lock for this table */
181 volatile u32 * writer_lock;
183 } vnet_classify_table_t;
185 struct _vnet_classify_main {
187 vnet_classify_table_t * tables;
189 /* Registered next-index, opaque unformat fcns */
190 unformat_function_t ** unformat_l2_next_index_fns;
191 unformat_function_t ** unformat_ip_next_index_fns;
192 unformat_function_t ** unformat_acl_next_index_fns;
193 unformat_function_t ** unformat_policer_next_index_fns;
194 unformat_function_t ** unformat_opaque_index_fns;
196 /* convenience variables */
197 vlib_main_t * vlib_main;
198 vnet_main_t * vnet_main;
201 extern vnet_classify_main_t vnet_classify_main;
203 u8 * format_classify_table (u8 * s, va_list * args);
205 u64 vnet_classify_hash_packet (vnet_classify_table_t * t, u8 * h);
208 vnet_classify_hash_packet_inline (vnet_classify_table_t * t,
216 } xor_sum __attribute__((aligned(sizeof(u32x4))));
220 #ifdef CLASSIFY_USE_SSE
221 if (U32X4_ALIGNED(h)) { //SSE can't handle unaligned data
222 u32x4 *data = (u32x4 *)h;
223 xor_sum.as_u32x4 = data[0 + t->skip_n_vectors] & mask[0];
224 switch (t->match_n_vectors)
227 xor_sum.as_u32x4 ^= data[4 + t->skip_n_vectors] & mask[4];
230 xor_sum.as_u32x4 ^= data[3 + t->skip_n_vectors] & mask[3];
233 xor_sum.as_u32x4 ^= data[2 + t->skip_n_vectors] & mask[2];
236 xor_sum.as_u32x4 ^= data[1 + t->skip_n_vectors] & mask[1];
244 #endif /* CLASSIFY_USE_SSE */
246 u32 skip_u64 = t->skip_n_vectors * 2;
247 u64 *data64 = (u64 *)h;
248 xor_sum.as_u64[0] = data64[0 + skip_u64] & ((u64 *)mask)[0];
249 xor_sum.as_u64[1] = data64[1 + skip_u64] & ((u64 *)mask)[1];
250 switch (t->match_n_vectors)
253 xor_sum.as_u64[0] ^= data64[8 + skip_u64] & ((u64 *)mask)[8];
254 xor_sum.as_u64[1] ^= data64[9 + skip_u64] & ((u64 *)mask)[9];
257 xor_sum.as_u64[0] ^= data64[6 + skip_u64] & ((u64 *)mask)[6];
258 xor_sum.as_u64[1] ^= data64[7 + skip_u64] & ((u64 *)mask)[7];
261 xor_sum.as_u64[0] ^= data64[4 + skip_u64] & ((u64 *)mask)[4];
262 xor_sum.as_u64[1] ^= data64[5 + skip_u64] & ((u64 *)mask)[5];
265 xor_sum.as_u64[0] ^= data64[2 + skip_u64] & ((u64 *)mask)[2];
266 xor_sum.as_u64[1] ^= data64[3 + skip_u64] & ((u64 *)mask)[3];
276 return clib_xxhash (xor_sum.as_u64[0] ^ xor_sum.as_u64[1]);
280 vnet_classify_prefetch_bucket (vnet_classify_table_t * t, u64 hash)
284 ASSERT (is_pow2(t->nbuckets));
286 bucket_index = hash & (t->nbuckets - 1);
288 CLIB_PREFETCH(&t->buckets[bucket_index], CLIB_CACHE_LINE_BYTES, LOAD);
291 static inline vnet_classify_entry_t *
292 vnet_classify_get_entry (vnet_classify_table_t * t, uword offset)
295 u8 * vp = hp + offset;
300 static inline uword vnet_classify_get_offset (vnet_classify_table_t * t,
301 vnet_classify_entry_t * v)
305 hp = (u8 *) t->mheap;
308 ASSERT((vp - hp) < 0x100000000ULL);
312 static inline vnet_classify_entry_t *
313 vnet_classify_entry_at_index (vnet_classify_table_t * t,
314 vnet_classify_entry_t * e,
321 eu8 += index * (sizeof (vnet_classify_entry_t) +
322 (t->match_n_vectors * sizeof (u32x4)));
324 return (vnet_classify_entry_t *) eu8;
328 vnet_classify_prefetch_entry (vnet_classify_table_t * t,
333 vnet_classify_bucket_t * b;
334 vnet_classify_entry_t * e;
336 bucket_index = hash & (t->nbuckets - 1);
338 b = &t->buckets[bucket_index];
343 hash >>= t->log2_nbuckets;
345 e = vnet_classify_get_entry (t, b->offset);
346 value_index = hash & ((1<<b->log2_pages)-1);
348 e = vnet_classify_entry_at_index (t, e, value_index);
350 CLIB_PREFETCH(e, CLIB_CACHE_LINE_BYTES, LOAD);
353 vnet_classify_entry_t *
354 vnet_classify_find_entry (vnet_classify_table_t * t,
355 u8 * h, u64 hash, f64 now);
357 static inline vnet_classify_entry_t *
358 vnet_classify_find_entry_inline (vnet_classify_table_t * t,
359 u8 * h, u64 hash, f64 now)
361 vnet_classify_entry_t * v;
366 } result __attribute__((aligned(sizeof(u32x4))));
367 vnet_classify_bucket_t * b;
373 bucket_index = hash & (t->nbuckets-1);
374 b = &t->buckets[bucket_index];
380 hash >>= t->log2_nbuckets;
382 v = vnet_classify_get_entry (t, b->offset);
383 value_index = hash & ((1<<b->log2_pages)-1);
384 limit = t->entries_per_page;
385 if (PREDICT_FALSE (b->linear_search))
388 limit *= (1<<b->log2_pages);
391 v = vnet_classify_entry_at_index (t, v, value_index);
393 #ifdef CLASSIFY_USE_SSE
394 if (U32X4_ALIGNED(h)) {
395 u32x4 *data = (u32x4 *) h;
396 for (i = 0; i < limit; i++) {
398 result.as_u32x4 = (data[0 + t->skip_n_vectors] & mask[0]) ^ key[0];
399 switch (t->match_n_vectors)
402 result.as_u32x4 |= (data[4 + t->skip_n_vectors] & mask[4]) ^ key[4];
405 result.as_u32x4 |= (data[3 + t->skip_n_vectors] & mask[3]) ^ key[3];
408 result.as_u32x4 |= (data[2 + t->skip_n_vectors] & mask[2]) ^ key[2];
411 result.as_u32x4 |= (data[1 + t->skip_n_vectors] & mask[1]) ^ key[1];
419 if (u32x4_zero_byte_mask (result.as_u32x4) == 0xffff) {
420 if (PREDICT_TRUE(now)) {
426 v = vnet_classify_entry_at_index (t, v, 1);
429 #endif /* CLASSIFY_USE_SSE */
431 u32 skip_u64 = t->skip_n_vectors * 2;
432 u64 *data64 = (u64 *)h;
433 for (i = 0; i < limit; i++) {
436 result.as_u64[0] = (data64[0 + skip_u64] & ((u64 *)mask)[0]) ^ ((u64 *)key)[0];
437 result.as_u64[1] = (data64[1 + skip_u64] & ((u64 *)mask)[1]) ^ ((u64 *)key)[1];
438 switch (t->match_n_vectors)
441 result.as_u64[0] |= (data64[8 + skip_u64] & ((u64 *)mask)[8]) ^ ((u64 *)key)[8];
442 result.as_u64[1] |= (data64[9 + skip_u64] & ((u64 *)mask)[9]) ^ ((u64 *)key)[9];
445 result.as_u64[0] |= (data64[6 + skip_u64] & ((u64 *)mask)[6]) ^ ((u64 *)key)[6];
446 result.as_u64[1] |= (data64[7 + skip_u64] & ((u64 *)mask)[7]) ^ ((u64 *)key)[7];
449 result.as_u64[0] |= (data64[4 + skip_u64] & ((u64 *)mask)[4]) ^ ((u64 *)key)[4];
450 result.as_u64[1] |= (data64[5 + skip_u64] & ((u64 *)mask)[5]) ^ ((u64 *)key)[5];
453 result.as_u64[0] |= (data64[2 + skip_u64] & ((u64 *)mask)[2]) ^ ((u64 *)key)[2];
454 result.as_u64[1] |= (data64[3 + skip_u64] & ((u64 *)mask)[3]) ^ ((u64 *)key)[3];
462 if (result.as_u64[0] == 0 && result.as_u64[1] == 0) {
463 if (PREDICT_TRUE(now)) {
470 v = vnet_classify_entry_at_index (t, v, 1);
476 vnet_classify_table_t *
477 vnet_classify_new_table (vnet_classify_main_t *cm,
478 u8 * mask, u32 nbuckets, u32 memory_size,
480 u32 match_n_vectors);
482 int vnet_classify_add_del_session (vnet_classify_main_t * cm,
492 int vnet_classify_add_del_table (vnet_classify_main_t * cm,
498 u32 next_table_index,
501 u8 current_data_flag,
502 i16 current_data_offset,
506 unformat_function_t unformat_ip4_mask;
507 unformat_function_t unformat_ip6_mask;
508 unformat_function_t unformat_l3_mask;
509 unformat_function_t unformat_l2_mask;
510 unformat_function_t unformat_classify_mask;
511 unformat_function_t unformat_l2_next_index;
512 unformat_function_t unformat_ip_next_index;
513 unformat_function_t unformat_ip4_match;
514 unformat_function_t unformat_ip6_match;
515 unformat_function_t unformat_l3_match;
516 unformat_function_t unformat_l4_match;
517 unformat_function_t unformat_vlan_tag;
518 unformat_function_t unformat_l2_match;
519 unformat_function_t unformat_classify_match;
521 void vnet_classify_register_unformat_ip_next_index_fn
522 (unformat_function_t * fn);
524 void vnet_classify_register_unformat_l2_next_index_fn
525 (unformat_function_t * fn);
527 void vnet_classify_register_unformat_acl_next_index_fn
528 (unformat_function_t * fn);
530 void vnet_classify_register_unformat_policer_next_index_fn
531 (unformat_function_t * fn);
533 void vnet_classify_register_unformat_opaque_index_fn (unformat_function_t * fn);
535 #endif /* __included_vnet_classify_h__ */