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__
18 #include <vnet/vnet.h>
19 #include <vnet/api_errno.h> /* for API error numbers */
21 #include <vppinfra/error.h>
22 #include <vppinfra/hash.h>
23 #include <vppinfra/cache.h>
24 #include <vppinfra/xxhash.h>
26 extern vlib_node_registration_t ip4_classify_node;
27 extern vlib_node_registration_t ip6_classify_node;
29 #define CLASSIFY_TRACE 0
31 #define U32X4_ALIGNED(p) PREDICT_TRUE((((intptr_t)p) & 0xf) == 0)
34 * Classify table option to process packets
35 * CLASSIFY_FLAG_USE_CURR_DATA:
36 * - classify packets starting from VPP node’s current data pointer
38 #define CLASSIFY_FLAG_USE_CURR_DATA 1
41 * Classify session action
42 * CLASSIFY_ACTION_SET_IP4_FIB_INDEX:
43 * - Classified IP packets will be looked up
44 * from the specified ipv4 fib table
45 * CLASSIFY_ACTION_SET_IP6_FIB_INDEX:
46 * - Classified IP packets will be looked up
47 * from the specified ipv6 fib table
49 typedef enum vnet_classify_action_t_
51 CLASSIFY_ACTION_SET_IP4_FIB_INDEX = 1,
52 CLASSIFY_ACTION_SET_IP6_FIB_INDEX = 2,
53 CLASSIFY_ACTION_SET_METADATA = 3,
54 } __attribute__ ((packed)) vnet_classify_action_t;
56 struct _vnet_classify_main;
57 typedef struct _vnet_classify_main vnet_classify_main_t;
59 #define foreach_size_in_u32x4 \
67 typedef CLIB_PACKED(struct _vnet_classify_entry {
68 /* Graph node next index */
71 /* put into vnet_buffer(b)->l2_classfy.opaque_index */
75 /* advance on hit, note it's a signed quantity... */
81 /* Really only need 1 bit */
83 #define VNET_CLASSIFY_ENTRY_FREE (1<<0)
85 vnet_classify_action_t action;
88 /* Hit counter, last heard time */
91 struct _vnet_classify_entry * next_free;
96 /* Must be aligned to a 16-octet boundary */
98 }) vnet_classify_entry_t;
102 vnet_classify_entry_is_free (vnet_classify_entry_t * e)
104 return e->flags & VNET_CLASSIFY_ENTRY_FREE;
108 vnet_classify_entry_is_busy (vnet_classify_entry_t * e)
110 return ((e->flags & VNET_CLASSIFY_ENTRY_FREE) == 0);
113 /* Need these to con the vector allocator */
116 typedef CLIB_PACKED(struct { \
120 }) vnet_classify_entry_##size##_t;
121 foreach_size_in_u32x4;
138 } vnet_classify_bucket_t;
142 CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
143 /* Mask to apply after skipping N vectors */
145 /* Buckets and entries */
146 vnet_classify_bucket_t *buckets;
147 vnet_classify_entry_t *entries;
149 /* Config parameters */
155 int entries_per_page;
157 u32 current_data_flag;
158 int current_data_offset;
160 /* Index of next table to try */
161 u32 next_table_index;
163 /* Miss next index, return if next_table_index = 0 */
166 /* Per-bucket working copies, one per thread */
167 vnet_classify_entry_t **working_copies;
168 int *working_copy_lengths;
169 vnet_classify_bucket_t saved_bucket;
171 /* Free entry freelists */
172 vnet_classify_entry_t **freelists;
176 /* Private allocation arena, protected by the writer lock */
179 /* Writer (only) lock for this table */
180 clib_spinlock_t writer_lock;
182 } vnet_classify_table_t;
184 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, u8 * h)
216 } xor_sum __attribute__ ((aligned (sizeof (u32x4))));
220 #ifdef CLIB_HAVE_VEC128
221 if (U32X4_ALIGNED (h))
222 { //SSE can't handle unaligned data
223 u32x4 *data = (u32x4 *) h;
224 xor_sum.as_u32x4 = data[0 + t->skip_n_vectors] & mask[0];
225 switch (t->match_n_vectors)
228 xor_sum.as_u32x4 ^= data[4 + t->skip_n_vectors] & mask[4];
231 xor_sum.as_u32x4 ^= data[3 + t->skip_n_vectors] & mask[3];
234 xor_sum.as_u32x4 ^= data[2 + t->skip_n_vectors] & mask[2];
237 xor_sum.as_u32x4 ^= data[1 + t->skip_n_vectors] & mask[1];
246 #endif /* CLIB_HAVE_VEC128 */
248 u32 skip_u64 = t->skip_n_vectors * 2;
249 u64 *data64 = (u64 *) h;
250 xor_sum.as_u64[0] = data64[0 + skip_u64] & ((u64 *) mask)[0];
251 xor_sum.as_u64[1] = data64[1 + skip_u64] & ((u64 *) mask)[1];
252 switch (t->match_n_vectors)
255 xor_sum.as_u64[0] ^= data64[8 + skip_u64] & ((u64 *) mask)[8];
256 xor_sum.as_u64[1] ^= data64[9 + skip_u64] & ((u64 *) mask)[9];
259 xor_sum.as_u64[0] ^= data64[6 + skip_u64] & ((u64 *) mask)[6];
260 xor_sum.as_u64[1] ^= data64[7 + skip_u64] & ((u64 *) mask)[7];
263 xor_sum.as_u64[0] ^= data64[4 + skip_u64] & ((u64 *) mask)[4];
264 xor_sum.as_u64[1] ^= data64[5 + skip_u64] & ((u64 *) mask)[5];
267 xor_sum.as_u64[0] ^= data64[2 + skip_u64] & ((u64 *) mask)[2];
268 xor_sum.as_u64[1] ^= data64[3 + skip_u64] & ((u64 *) mask)[3];
278 return clib_xxhash (xor_sum.as_u64[0] ^ xor_sum.as_u64[1]);
282 vnet_classify_prefetch_bucket (vnet_classify_table_t * t, u64 hash)
286 ASSERT (is_pow2 (t->nbuckets));
288 bucket_index = hash & (t->nbuckets - 1);
290 CLIB_PREFETCH (&t->buckets[bucket_index], CLIB_CACHE_LINE_BYTES, LOAD);
293 static inline vnet_classify_entry_t *
294 vnet_classify_get_entry (vnet_classify_table_t * t, uword offset)
297 u8 *vp = hp + offset;
303 vnet_classify_get_offset (vnet_classify_table_t * t,
304 vnet_classify_entry_t * v)
308 hp = (u8 *) t->mheap;
311 ASSERT ((vp - hp) < 0x100000000ULL);
315 static inline vnet_classify_entry_t *
316 vnet_classify_entry_at_index (vnet_classify_table_t * t,
317 vnet_classify_entry_t * e, u32 index)
323 eu8 += index * (sizeof (vnet_classify_entry_t) +
324 (t->match_n_vectors * sizeof (u32x4)));
326 return (vnet_classify_entry_t *) eu8;
330 vnet_classify_prefetch_entry (vnet_classify_table_t * t, u64 hash)
334 vnet_classify_bucket_t *b;
335 vnet_classify_entry_t *e;
337 bucket_index = hash & (t->nbuckets - 1);
339 b = &t->buckets[bucket_index];
344 hash >>= t->log2_nbuckets;
346 e = vnet_classify_get_entry (t, b->offset);
347 value_index = hash & ((1 << b->log2_pages) - 1);
349 e = vnet_classify_entry_at_index (t, e, value_index);
351 CLIB_PREFETCH (e, CLIB_CACHE_LINE_BYTES, LOAD);
354 vnet_classify_entry_t *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;
367 } result __attribute__ ((aligned (sizeof (u32x4))));
368 vnet_classify_bucket_t *b;
374 bucket_index = hash & (t->nbuckets - 1);
375 b = &t->buckets[bucket_index];
381 hash >>= t->log2_nbuckets;
383 v = vnet_classify_get_entry (t, b->offset);
384 value_index = hash & ((1 << b->log2_pages) - 1);
385 limit = t->entries_per_page;
386 if (PREDICT_FALSE (b->linear_search))
389 limit *= (1 << b->log2_pages);
392 v = vnet_classify_entry_at_index (t, v, value_index);
394 #ifdef CLIB_HAVE_VEC128
395 if (U32X4_ALIGNED (h))
397 u32x4 *data = (u32x4 *) h;
398 for (i = 0; i < limit; i++)
401 result.as_u32x4 = (data[0 + t->skip_n_vectors] & mask[0]) ^ key[0];
402 switch (t->match_n_vectors)
406 (data[4 + t->skip_n_vectors] & mask[4]) ^ key[4];
410 (data[3 + t->skip_n_vectors] & mask[3]) ^ key[3];
414 (data[2 + t->skip_n_vectors] & mask[2]) ^ key[2];
418 (data[1 + t->skip_n_vectors] & mask[1]) ^ key[1];
426 if (u32x4_zero_byte_mask (result.as_u32x4) == 0xffff)
428 if (PREDICT_TRUE (now))
435 v = vnet_classify_entry_at_index (t, v, 1);
439 #endif /* CLIB_HAVE_VEC128 */
441 u32 skip_u64 = t->skip_n_vectors * 2;
442 u64 *data64 = (u64 *) h;
443 for (i = 0; i < limit; i++)
448 (data64[0 + skip_u64] & ((u64 *) mask)[0]) ^ ((u64 *) key)[0];
450 (data64[1 + skip_u64] & ((u64 *) mask)[1]) ^ ((u64 *) key)[1];
451 switch (t->match_n_vectors)
455 (data64[8 + skip_u64] & ((u64 *) mask)[8]) ^ ((u64 *) key)[8];
457 (data64[9 + skip_u64] & ((u64 *) mask)[9]) ^ ((u64 *) key)[9];
461 (data64[6 + skip_u64] & ((u64 *) mask)[6]) ^ ((u64 *) key)[6];
463 (data64[7 + skip_u64] & ((u64 *) mask)[7]) ^ ((u64 *) key)[7];
467 (data64[4 + skip_u64] & ((u64 *) mask)[4]) ^ ((u64 *) key)[4];
469 (data64[5 + skip_u64] & ((u64 *) mask)[5]) ^ ((u64 *) key)[5];
473 (data64[2 + skip_u64] & ((u64 *) mask)[2]) ^ ((u64 *) key)[2];
475 (data64[3 + skip_u64] & ((u64 *) mask)[3]) ^ ((u64 *) key)[3];
483 if (result.as_u64[0] == 0 && result.as_u64[1] == 0)
485 if (PREDICT_TRUE (now))
493 v = vnet_classify_entry_at_index (t, v, 1);
499 vnet_classify_table_t *vnet_classify_new_table (vnet_classify_main_t * cm,
500 u8 * mask, u32 nbuckets,
503 u32 match_n_vectors);
505 int vnet_classify_add_del_session (vnet_classify_main_t * cm,
511 u8 action, u32 metadata, int is_add);
513 int vnet_classify_add_del_table (vnet_classify_main_t * cm,
519 u32 next_table_index,
522 u8 current_data_flag,
523 i16 current_data_offset,
524 int is_add, int del_chain);
526 unformat_function_t unformat_ip4_mask;
527 unformat_function_t unformat_ip6_mask;
528 unformat_function_t unformat_l3_mask;
529 unformat_function_t unformat_l2_mask;
530 unformat_function_t unformat_classify_mask;
531 unformat_function_t unformat_l2_next_index;
532 unformat_function_t unformat_ip_next_index;
533 unformat_function_t unformat_ip4_match;
534 unformat_function_t unformat_ip6_match;
535 unformat_function_t unformat_l3_match;
536 unformat_function_t unformat_l4_match;
537 unformat_function_t unformat_vlan_tag;
538 unformat_function_t unformat_l2_match;
539 unformat_function_t unformat_classify_match;
541 void vnet_classify_register_unformat_ip_next_index_fn
542 (unformat_function_t * fn);
544 void vnet_classify_register_unformat_l2_next_index_fn
545 (unformat_function_t * fn);
547 void vnet_classify_register_unformat_acl_next_index_fn
548 (unformat_function_t * fn);
550 void vnet_classify_register_unformat_policer_next_index_fn
551 (unformat_function_t * fn);
553 void vnet_classify_register_unformat_opaque_index_fn (unformat_function_t *
556 #endif /* __included_vnet_classify_h__ */
559 * fd.io coding-style-patch-verification: ON
562 * eval: (c-set-style "gnu")