798 lines
23 KiB
C
798 lines
23 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Randomized tests for eBPF longest-prefix-match maps
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*
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* This program runs randomized tests against the lpm-bpf-map. It implements a
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* "Trivial Longest Prefix Match" (tlpm) based on simple, linear, singly linked
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* lists. The implementation should be pretty straightforward.
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*
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* Based on tlpm, this inserts randomized data into bpf-lpm-maps and verifies
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* the trie-based bpf-map implementation behaves the same way as tlpm.
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*/
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#include <assert.h>
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#include <errno.h>
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#include <inttypes.h>
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#include <linux/bpf.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <arpa/inet.h>
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#include <sys/time.h>
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#include <bpf/bpf.h>
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#include "bpf_util.h"
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struct tlpm_node {
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struct tlpm_node *next;
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size_t n_bits;
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uint8_t key[];
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};
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static struct tlpm_node *tlpm_match(struct tlpm_node *list,
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const uint8_t *key,
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size_t n_bits);
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static struct tlpm_node *tlpm_add(struct tlpm_node *list,
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const uint8_t *key,
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size_t n_bits)
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{
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struct tlpm_node *node;
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size_t n;
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n = (n_bits + 7) / 8;
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/* 'overwrite' an equivalent entry if one already exists */
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node = tlpm_match(list, key, n_bits);
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if (node && node->n_bits == n_bits) {
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memcpy(node->key, key, n);
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return list;
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}
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/* add new entry with @key/@n_bits to @list and return new head */
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node = malloc(sizeof(*node) + n);
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assert(node);
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node->next = list;
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node->n_bits = n_bits;
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memcpy(node->key, key, n);
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return node;
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}
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static void tlpm_clear(struct tlpm_node *list)
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{
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struct tlpm_node *node;
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/* free all entries in @list */
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while ((node = list)) {
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list = list->next;
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free(node);
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}
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}
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static struct tlpm_node *tlpm_match(struct tlpm_node *list,
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const uint8_t *key,
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size_t n_bits)
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{
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struct tlpm_node *best = NULL;
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size_t i;
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/* Perform longest prefix-match on @key/@n_bits. That is, iterate all
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* entries and match each prefix against @key. Remember the "best"
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* entry we find (i.e., the longest prefix that matches) and return it
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* to the caller when done.
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*/
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for ( ; list; list = list->next) {
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for (i = 0; i < n_bits && i < list->n_bits; ++i) {
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if ((key[i / 8] & (1 << (7 - i % 8))) !=
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(list->key[i / 8] & (1 << (7 - i % 8))))
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break;
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}
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if (i >= list->n_bits) {
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if (!best || i > best->n_bits)
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best = list;
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}
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}
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return best;
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}
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static struct tlpm_node *tlpm_delete(struct tlpm_node *list,
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const uint8_t *key,
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size_t n_bits)
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{
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struct tlpm_node *best = tlpm_match(list, key, n_bits);
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struct tlpm_node *node;
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if (!best || best->n_bits != n_bits)
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return list;
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if (best == list) {
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node = best->next;
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free(best);
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return node;
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}
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for (node = list; node; node = node->next) {
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if (node->next == best) {
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node->next = best->next;
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free(best);
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return list;
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}
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}
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/* should never get here */
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assert(0);
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return list;
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}
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static void test_lpm_basic(void)
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{
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struct tlpm_node *list = NULL, *t1, *t2;
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/* very basic, static tests to verify tlpm works as expected */
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assert(!tlpm_match(list, (uint8_t[]){ 0xff }, 8));
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t1 = list = tlpm_add(list, (uint8_t[]){ 0xff }, 8);
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assert(t1 == tlpm_match(list, (uint8_t[]){ 0xff }, 8));
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assert(t1 == tlpm_match(list, (uint8_t[]){ 0xff, 0xff }, 16));
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assert(t1 == tlpm_match(list, (uint8_t[]){ 0xff, 0x00 }, 16));
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assert(!tlpm_match(list, (uint8_t[]){ 0x7f }, 8));
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assert(!tlpm_match(list, (uint8_t[]){ 0xfe }, 8));
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assert(!tlpm_match(list, (uint8_t[]){ 0xff }, 7));
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t2 = list = tlpm_add(list, (uint8_t[]){ 0xff, 0xff }, 16);
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assert(t1 == tlpm_match(list, (uint8_t[]){ 0xff }, 8));
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assert(t2 == tlpm_match(list, (uint8_t[]){ 0xff, 0xff }, 16));
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assert(t1 == tlpm_match(list, (uint8_t[]){ 0xff, 0xff }, 15));
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assert(!tlpm_match(list, (uint8_t[]){ 0x7f, 0xff }, 16));
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list = tlpm_delete(list, (uint8_t[]){ 0xff, 0xff }, 16);
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assert(t1 == tlpm_match(list, (uint8_t[]){ 0xff }, 8));
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assert(t1 == tlpm_match(list, (uint8_t[]){ 0xff, 0xff }, 16));
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list = tlpm_delete(list, (uint8_t[]){ 0xff }, 8);
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assert(!tlpm_match(list, (uint8_t[]){ 0xff }, 8));
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tlpm_clear(list);
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}
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static void test_lpm_order(void)
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{
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struct tlpm_node *t1, *t2, *l1 = NULL, *l2 = NULL;
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size_t i, j;
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/* Verify the tlpm implementation works correctly regardless of the
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* order of entries. Insert a random set of entries into @l1, and copy
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* the same data in reverse order into @l2. Then verify a lookup of
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* random keys will yield the same result in both sets.
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*/
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for (i = 0; i < (1 << 12); ++i)
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l1 = tlpm_add(l1, (uint8_t[]){
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rand() % 0xff,
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rand() % 0xff,
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}, rand() % 16 + 1);
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for (t1 = l1; t1; t1 = t1->next)
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l2 = tlpm_add(l2, t1->key, t1->n_bits);
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for (i = 0; i < (1 << 8); ++i) {
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uint8_t key[] = { rand() % 0xff, rand() % 0xff };
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t1 = tlpm_match(l1, key, 16);
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t2 = tlpm_match(l2, key, 16);
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assert(!t1 == !t2);
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if (t1) {
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assert(t1->n_bits == t2->n_bits);
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for (j = 0; j < t1->n_bits; ++j)
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assert((t1->key[j / 8] & (1 << (7 - j % 8))) ==
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(t2->key[j / 8] & (1 << (7 - j % 8))));
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}
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}
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tlpm_clear(l1);
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tlpm_clear(l2);
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}
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static void test_lpm_map(int keysize)
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{
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LIBBPF_OPTS(bpf_map_create_opts, opts, .map_flags = BPF_F_NO_PREALLOC);
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volatile size_t n_matches, n_matches_after_delete;
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size_t i, j, n_nodes, n_lookups;
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struct tlpm_node *t, *list = NULL;
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struct bpf_lpm_trie_key_u8 *key;
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uint8_t *data, *value;
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int r, map;
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/* Compare behavior of tlpm vs. bpf-lpm. Create a randomized set of
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* prefixes and insert it into both tlpm and bpf-lpm. Then run some
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* randomized lookups and verify both maps return the same result.
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*/
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n_matches = 0;
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n_matches_after_delete = 0;
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n_nodes = 1 << 8;
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n_lookups = 1 << 16;
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data = alloca(keysize);
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memset(data, 0, keysize);
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value = alloca(keysize + 1);
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memset(value, 0, keysize + 1);
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key = alloca(sizeof(*key) + keysize);
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memset(key, 0, sizeof(*key) + keysize);
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map = bpf_map_create(BPF_MAP_TYPE_LPM_TRIE, NULL,
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sizeof(*key) + keysize,
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keysize + 1,
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4096,
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&opts);
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assert(map >= 0);
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for (i = 0; i < n_nodes; ++i) {
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for (j = 0; j < keysize; ++j)
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value[j] = rand() & 0xff;
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value[keysize] = rand() % (8 * keysize + 1);
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list = tlpm_add(list, value, value[keysize]);
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key->prefixlen = value[keysize];
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memcpy(key->data, value, keysize);
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r = bpf_map_update_elem(map, key, value, 0);
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assert(!r);
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}
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for (i = 0; i < n_lookups; ++i) {
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for (j = 0; j < keysize; ++j)
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data[j] = rand() & 0xff;
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t = tlpm_match(list, data, 8 * keysize);
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key->prefixlen = 8 * keysize;
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memcpy(key->data, data, keysize);
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r = bpf_map_lookup_elem(map, key, value);
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assert(!r || errno == ENOENT);
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assert(!t == !!r);
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if (t) {
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++n_matches;
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assert(t->n_bits == value[keysize]);
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for (j = 0; j < t->n_bits; ++j)
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assert((t->key[j / 8] & (1 << (7 - j % 8))) ==
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(value[j / 8] & (1 << (7 - j % 8))));
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}
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}
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/* Remove the first half of the elements in the tlpm and the
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* corresponding nodes from the bpf-lpm. Then run the same
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* large number of random lookups in both and make sure they match.
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* Note: we need to count the number of nodes actually inserted
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* since there may have been duplicates.
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*/
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for (i = 0, t = list; t; i++, t = t->next)
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;
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for (j = 0; j < i / 2; ++j) {
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key->prefixlen = list->n_bits;
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memcpy(key->data, list->key, keysize);
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r = bpf_map_delete_elem(map, key);
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assert(!r);
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list = tlpm_delete(list, list->key, list->n_bits);
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assert(list);
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}
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for (i = 0; i < n_lookups; ++i) {
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for (j = 0; j < keysize; ++j)
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data[j] = rand() & 0xff;
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t = tlpm_match(list, data, 8 * keysize);
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key->prefixlen = 8 * keysize;
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memcpy(key->data, data, keysize);
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r = bpf_map_lookup_elem(map, key, value);
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assert(!r || errno == ENOENT);
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assert(!t == !!r);
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if (t) {
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++n_matches_after_delete;
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assert(t->n_bits == value[keysize]);
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for (j = 0; j < t->n_bits; ++j)
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assert((t->key[j / 8] & (1 << (7 - j % 8))) ==
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(value[j / 8] & (1 << (7 - j % 8))));
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}
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}
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close(map);
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tlpm_clear(list);
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/* With 255 random nodes in the map, we are pretty likely to match
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* something on every lookup. For statistics, use this:
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*
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* printf(" nodes: %zu\n"
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* " lookups: %zu\n"
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* " matches: %zu\n"
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* "matches(delete): %zu\n",
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* n_nodes, n_lookups, n_matches, n_matches_after_delete);
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*/
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}
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/* Test the implementation with some 'real world' examples */
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static void test_lpm_ipaddr(void)
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{
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LIBBPF_OPTS(bpf_map_create_opts, opts, .map_flags = BPF_F_NO_PREALLOC);
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struct bpf_lpm_trie_key_u8 *key_ipv4;
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struct bpf_lpm_trie_key_u8 *key_ipv6;
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size_t key_size_ipv4;
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size_t key_size_ipv6;
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int map_fd_ipv4;
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int map_fd_ipv6;
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__u64 value;
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key_size_ipv4 = sizeof(*key_ipv4) + sizeof(__u32);
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key_size_ipv6 = sizeof(*key_ipv6) + sizeof(__u32) * 4;
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key_ipv4 = alloca(key_size_ipv4);
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key_ipv6 = alloca(key_size_ipv6);
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map_fd_ipv4 = bpf_map_create(BPF_MAP_TYPE_LPM_TRIE, NULL,
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key_size_ipv4, sizeof(value),
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100, &opts);
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assert(map_fd_ipv4 >= 0);
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map_fd_ipv6 = bpf_map_create(BPF_MAP_TYPE_LPM_TRIE, NULL,
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key_size_ipv6, sizeof(value),
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100, &opts);
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assert(map_fd_ipv6 >= 0);
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/* Fill data some IPv4 and IPv6 address ranges */
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value = 1;
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key_ipv4->prefixlen = 16;
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inet_pton(AF_INET, "192.168.0.0", key_ipv4->data);
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assert(bpf_map_update_elem(map_fd_ipv4, key_ipv4, &value, 0) == 0);
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value = 2;
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key_ipv4->prefixlen = 24;
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inet_pton(AF_INET, "192.168.0.0", key_ipv4->data);
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assert(bpf_map_update_elem(map_fd_ipv4, key_ipv4, &value, 0) == 0);
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value = 3;
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key_ipv4->prefixlen = 24;
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inet_pton(AF_INET, "192.168.128.0", key_ipv4->data);
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assert(bpf_map_update_elem(map_fd_ipv4, key_ipv4, &value, 0) == 0);
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value = 5;
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key_ipv4->prefixlen = 24;
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inet_pton(AF_INET, "192.168.1.0", key_ipv4->data);
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assert(bpf_map_update_elem(map_fd_ipv4, key_ipv4, &value, 0) == 0);
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value = 4;
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key_ipv4->prefixlen = 23;
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inet_pton(AF_INET, "192.168.0.0", key_ipv4->data);
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assert(bpf_map_update_elem(map_fd_ipv4, key_ipv4, &value, 0) == 0);
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value = 0xdeadbeef;
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key_ipv6->prefixlen = 64;
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inet_pton(AF_INET6, "2a00:1450:4001:814::200e", key_ipv6->data);
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assert(bpf_map_update_elem(map_fd_ipv6, key_ipv6, &value, 0) == 0);
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/* Set tprefixlen to maximum for lookups */
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key_ipv4->prefixlen = 32;
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key_ipv6->prefixlen = 128;
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/* Test some lookups that should come back with a value */
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inet_pton(AF_INET, "192.168.128.23", key_ipv4->data);
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assert(bpf_map_lookup_elem(map_fd_ipv4, key_ipv4, &value) == 0);
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assert(value == 3);
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inet_pton(AF_INET, "192.168.0.1", key_ipv4->data);
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assert(bpf_map_lookup_elem(map_fd_ipv4, key_ipv4, &value) == 0);
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assert(value == 2);
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inet_pton(AF_INET6, "2a00:1450:4001:814::", key_ipv6->data);
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assert(bpf_map_lookup_elem(map_fd_ipv6, key_ipv6, &value) == 0);
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assert(value == 0xdeadbeef);
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inet_pton(AF_INET6, "2a00:1450:4001:814::1", key_ipv6->data);
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assert(bpf_map_lookup_elem(map_fd_ipv6, key_ipv6, &value) == 0);
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assert(value == 0xdeadbeef);
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/* Test some lookups that should not match any entry */
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inet_pton(AF_INET, "10.0.0.1", key_ipv4->data);
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assert(bpf_map_lookup_elem(map_fd_ipv4, key_ipv4, &value) == -ENOENT);
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inet_pton(AF_INET, "11.11.11.11", key_ipv4->data);
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assert(bpf_map_lookup_elem(map_fd_ipv4, key_ipv4, &value) == -ENOENT);
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inet_pton(AF_INET6, "2a00:ffff::", key_ipv6->data);
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assert(bpf_map_lookup_elem(map_fd_ipv6, key_ipv6, &value) == -ENOENT);
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close(map_fd_ipv4);
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close(map_fd_ipv6);
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}
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static void test_lpm_delete(void)
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{
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LIBBPF_OPTS(bpf_map_create_opts, opts, .map_flags = BPF_F_NO_PREALLOC);
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struct bpf_lpm_trie_key_u8 *key;
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size_t key_size;
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int map_fd;
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__u64 value;
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key_size = sizeof(*key) + sizeof(__u32);
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key = alloca(key_size);
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map_fd = bpf_map_create(BPF_MAP_TYPE_LPM_TRIE, NULL,
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key_size, sizeof(value),
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100, &opts);
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assert(map_fd >= 0);
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/* Add nodes:
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* 192.168.0.0/16 (1)
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* 192.168.0.0/24 (2)
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* 192.168.128.0/24 (3)
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* 192.168.1.0/24 (4)
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*
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* (1)
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* / \
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* (IM) (3)
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* / \
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* (2) (4)
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*/
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value = 1;
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key->prefixlen = 16;
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inet_pton(AF_INET, "192.168.0.0", key->data);
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assert(bpf_map_update_elem(map_fd, key, &value, 0) == 0);
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value = 2;
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key->prefixlen = 24;
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inet_pton(AF_INET, "192.168.0.0", key->data);
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assert(bpf_map_update_elem(map_fd, key, &value, 0) == 0);
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value = 3;
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key->prefixlen = 24;
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|
inet_pton(AF_INET, "192.168.128.0", key->data);
|
|
assert(bpf_map_update_elem(map_fd, key, &value, 0) == 0);
|
|
|
|
value = 4;
|
|
key->prefixlen = 24;
|
|
inet_pton(AF_INET, "192.168.1.0", key->data);
|
|
assert(bpf_map_update_elem(map_fd, key, &value, 0) == 0);
|
|
|
|
/* remove non-existent node */
|
|
key->prefixlen = 32;
|
|
inet_pton(AF_INET, "10.0.0.1", key->data);
|
|
assert(bpf_map_lookup_elem(map_fd, key, &value) == -ENOENT);
|
|
|
|
key->prefixlen = 30; // unused prefix so far
|
|
inet_pton(AF_INET, "192.255.0.0", key->data);
|
|
assert(bpf_map_delete_elem(map_fd, key) == -ENOENT);
|
|
|
|
key->prefixlen = 16; // same prefix as the root node
|
|
inet_pton(AF_INET, "192.255.0.0", key->data);
|
|
assert(bpf_map_delete_elem(map_fd, key) == -ENOENT);
|
|
|
|
/* assert initial lookup */
|
|
key->prefixlen = 32;
|
|
inet_pton(AF_INET, "192.168.0.1", key->data);
|
|
assert(bpf_map_lookup_elem(map_fd, key, &value) == 0);
|
|
assert(value == 2);
|
|
|
|
/* remove leaf node */
|
|
key->prefixlen = 24;
|
|
inet_pton(AF_INET, "192.168.0.0", key->data);
|
|
assert(bpf_map_delete_elem(map_fd, key) == 0);
|
|
|
|
key->prefixlen = 32;
|
|
inet_pton(AF_INET, "192.168.0.1", key->data);
|
|
assert(bpf_map_lookup_elem(map_fd, key, &value) == 0);
|
|
assert(value == 1);
|
|
|
|
/* remove leaf (and intermediary) node */
|
|
key->prefixlen = 24;
|
|
inet_pton(AF_INET, "192.168.1.0", key->data);
|
|
assert(bpf_map_delete_elem(map_fd, key) == 0);
|
|
|
|
key->prefixlen = 32;
|
|
inet_pton(AF_INET, "192.168.1.1", key->data);
|
|
assert(bpf_map_lookup_elem(map_fd, key, &value) == 0);
|
|
assert(value == 1);
|
|
|
|
/* remove root node */
|
|
key->prefixlen = 16;
|
|
inet_pton(AF_INET, "192.168.0.0", key->data);
|
|
assert(bpf_map_delete_elem(map_fd, key) == 0);
|
|
|
|
key->prefixlen = 32;
|
|
inet_pton(AF_INET, "192.168.128.1", key->data);
|
|
assert(bpf_map_lookup_elem(map_fd, key, &value) == 0);
|
|
assert(value == 3);
|
|
|
|
/* remove last node */
|
|
key->prefixlen = 24;
|
|
inet_pton(AF_INET, "192.168.128.0", key->data);
|
|
assert(bpf_map_delete_elem(map_fd, key) == 0);
|
|
|
|
key->prefixlen = 32;
|
|
inet_pton(AF_INET, "192.168.128.1", key->data);
|
|
assert(bpf_map_lookup_elem(map_fd, key, &value) == -ENOENT);
|
|
|
|
close(map_fd);
|
|
}
|
|
|
|
static void test_lpm_get_next_key(void)
|
|
{
|
|
LIBBPF_OPTS(bpf_map_create_opts, opts, .map_flags = BPF_F_NO_PREALLOC);
|
|
struct bpf_lpm_trie_key_u8 *key_p, *next_key_p;
|
|
size_t key_size;
|
|
__u32 value = 0;
|
|
int map_fd;
|
|
|
|
key_size = sizeof(*key_p) + sizeof(__u32);
|
|
key_p = alloca(key_size);
|
|
next_key_p = alloca(key_size);
|
|
|
|
map_fd = bpf_map_create(BPF_MAP_TYPE_LPM_TRIE, NULL, key_size, sizeof(value), 100, &opts);
|
|
assert(map_fd >= 0);
|
|
|
|
/* empty tree. get_next_key should return ENOENT */
|
|
assert(bpf_map_get_next_key(map_fd, NULL, key_p) == -ENOENT);
|
|
|
|
/* get and verify the first key, get the second one should fail. */
|
|
key_p->prefixlen = 16;
|
|
inet_pton(AF_INET, "192.168.0.0", key_p->data);
|
|
assert(bpf_map_update_elem(map_fd, key_p, &value, 0) == 0);
|
|
|
|
memset(key_p, 0, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, NULL, key_p) == 0);
|
|
assert(key_p->prefixlen == 16 && key_p->data[0] == 192 &&
|
|
key_p->data[1] == 168);
|
|
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == -ENOENT);
|
|
|
|
/* no exact matching key should get the first one in post order. */
|
|
key_p->prefixlen = 8;
|
|
assert(bpf_map_get_next_key(map_fd, NULL, key_p) == 0);
|
|
assert(key_p->prefixlen == 16 && key_p->data[0] == 192 &&
|
|
key_p->data[1] == 168);
|
|
|
|
/* add one more element (total two) */
|
|
key_p->prefixlen = 24;
|
|
inet_pton(AF_INET, "192.168.128.0", key_p->data);
|
|
assert(bpf_map_update_elem(map_fd, key_p, &value, 0) == 0);
|
|
|
|
memset(key_p, 0, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, NULL, key_p) == 0);
|
|
assert(key_p->prefixlen == 24 && key_p->data[0] == 192 &&
|
|
key_p->data[1] == 168 && key_p->data[2] == 128);
|
|
|
|
memset(next_key_p, 0, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0);
|
|
assert(next_key_p->prefixlen == 16 && next_key_p->data[0] == 192 &&
|
|
next_key_p->data[1] == 168);
|
|
|
|
memcpy(key_p, next_key_p, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == -ENOENT);
|
|
|
|
/* Add one more element (total three) */
|
|
key_p->prefixlen = 24;
|
|
inet_pton(AF_INET, "192.168.0.0", key_p->data);
|
|
assert(bpf_map_update_elem(map_fd, key_p, &value, 0) == 0);
|
|
|
|
memset(key_p, 0, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, NULL, key_p) == 0);
|
|
assert(key_p->prefixlen == 24 && key_p->data[0] == 192 &&
|
|
key_p->data[1] == 168 && key_p->data[2] == 0);
|
|
|
|
memset(next_key_p, 0, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0);
|
|
assert(next_key_p->prefixlen == 24 && next_key_p->data[0] == 192 &&
|
|
next_key_p->data[1] == 168 && next_key_p->data[2] == 128);
|
|
|
|
memcpy(key_p, next_key_p, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0);
|
|
assert(next_key_p->prefixlen == 16 && next_key_p->data[0] == 192 &&
|
|
next_key_p->data[1] == 168);
|
|
|
|
memcpy(key_p, next_key_p, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == -ENOENT);
|
|
|
|
/* Add one more element (total four) */
|
|
key_p->prefixlen = 24;
|
|
inet_pton(AF_INET, "192.168.1.0", key_p->data);
|
|
assert(bpf_map_update_elem(map_fd, key_p, &value, 0) == 0);
|
|
|
|
memset(key_p, 0, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, NULL, key_p) == 0);
|
|
assert(key_p->prefixlen == 24 && key_p->data[0] == 192 &&
|
|
key_p->data[1] == 168 && key_p->data[2] == 0);
|
|
|
|
memset(next_key_p, 0, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0);
|
|
assert(next_key_p->prefixlen == 24 && next_key_p->data[0] == 192 &&
|
|
next_key_p->data[1] == 168 && next_key_p->data[2] == 1);
|
|
|
|
memcpy(key_p, next_key_p, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0);
|
|
assert(next_key_p->prefixlen == 24 && next_key_p->data[0] == 192 &&
|
|
next_key_p->data[1] == 168 && next_key_p->data[2] == 128);
|
|
|
|
memcpy(key_p, next_key_p, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0);
|
|
assert(next_key_p->prefixlen == 16 && next_key_p->data[0] == 192 &&
|
|
next_key_p->data[1] == 168);
|
|
|
|
memcpy(key_p, next_key_p, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == -ENOENT);
|
|
|
|
/* Add one more element (total five) */
|
|
key_p->prefixlen = 28;
|
|
inet_pton(AF_INET, "192.168.1.128", key_p->data);
|
|
assert(bpf_map_update_elem(map_fd, key_p, &value, 0) == 0);
|
|
|
|
memset(key_p, 0, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, NULL, key_p) == 0);
|
|
assert(key_p->prefixlen == 24 && key_p->data[0] == 192 &&
|
|
key_p->data[1] == 168 && key_p->data[2] == 0);
|
|
|
|
memset(next_key_p, 0, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0);
|
|
assert(next_key_p->prefixlen == 28 && next_key_p->data[0] == 192 &&
|
|
next_key_p->data[1] == 168 && next_key_p->data[2] == 1 &&
|
|
next_key_p->data[3] == 128);
|
|
|
|
memcpy(key_p, next_key_p, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0);
|
|
assert(next_key_p->prefixlen == 24 && next_key_p->data[0] == 192 &&
|
|
next_key_p->data[1] == 168 && next_key_p->data[2] == 1);
|
|
|
|
memcpy(key_p, next_key_p, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0);
|
|
assert(next_key_p->prefixlen == 24 && next_key_p->data[0] == 192 &&
|
|
next_key_p->data[1] == 168 && next_key_p->data[2] == 128);
|
|
|
|
memcpy(key_p, next_key_p, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0);
|
|
assert(next_key_p->prefixlen == 16 && next_key_p->data[0] == 192 &&
|
|
next_key_p->data[1] == 168);
|
|
|
|
memcpy(key_p, next_key_p, key_size);
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == -ENOENT);
|
|
|
|
/* no exact matching key should return the first one in post order */
|
|
key_p->prefixlen = 22;
|
|
inet_pton(AF_INET, "192.168.1.0", key_p->data);
|
|
assert(bpf_map_get_next_key(map_fd, key_p, next_key_p) == 0);
|
|
assert(next_key_p->prefixlen == 24 && next_key_p->data[0] == 192 &&
|
|
next_key_p->data[1] == 168 && next_key_p->data[2] == 0);
|
|
|
|
close(map_fd);
|
|
}
|
|
|
|
#define MAX_TEST_KEYS 4
|
|
struct lpm_mt_test_info {
|
|
int cmd; /* 0: update, 1: delete, 2: lookup, 3: get_next_key */
|
|
int iter;
|
|
int map_fd;
|
|
struct {
|
|
__u32 prefixlen;
|
|
__u32 data;
|
|
} key[MAX_TEST_KEYS];
|
|
};
|
|
|
|
static void *lpm_test_command(void *arg)
|
|
{
|
|
int i, j, ret, iter, key_size;
|
|
struct lpm_mt_test_info *info = arg;
|
|
struct bpf_lpm_trie_key_u8 *key_p;
|
|
|
|
key_size = sizeof(*key_p) + sizeof(__u32);
|
|
key_p = alloca(key_size);
|
|
for (iter = 0; iter < info->iter; iter++)
|
|
for (i = 0; i < MAX_TEST_KEYS; i++) {
|
|
/* first half of iterations in forward order,
|
|
* and second half in backward order.
|
|
*/
|
|
j = (iter < (info->iter / 2)) ? i : MAX_TEST_KEYS - i - 1;
|
|
key_p->prefixlen = info->key[j].prefixlen;
|
|
memcpy(key_p->data, &info->key[j].data, sizeof(__u32));
|
|
if (info->cmd == 0) {
|
|
__u32 value = j;
|
|
/* update must succeed */
|
|
assert(bpf_map_update_elem(info->map_fd, key_p, &value, 0) == 0);
|
|
} else if (info->cmd == 1) {
|
|
ret = bpf_map_delete_elem(info->map_fd, key_p);
|
|
assert(ret == 0 || errno == ENOENT);
|
|
} else if (info->cmd == 2) {
|
|
__u32 value;
|
|
ret = bpf_map_lookup_elem(info->map_fd, key_p, &value);
|
|
assert(ret == 0 || errno == ENOENT);
|
|
} else {
|
|
struct bpf_lpm_trie_key_u8 *next_key_p = alloca(key_size);
|
|
ret = bpf_map_get_next_key(info->map_fd, key_p, next_key_p);
|
|
assert(ret == 0 || errno == ENOENT || errno == ENOMEM);
|
|
}
|
|
}
|
|
|
|
// Pass successful exit info back to the main thread
|
|
pthread_exit((void *)info);
|
|
}
|
|
|
|
static void setup_lpm_mt_test_info(struct lpm_mt_test_info *info, int map_fd)
|
|
{
|
|
info->iter = 2000;
|
|
info->map_fd = map_fd;
|
|
info->key[0].prefixlen = 16;
|
|
inet_pton(AF_INET, "192.168.0.0", &info->key[0].data);
|
|
info->key[1].prefixlen = 24;
|
|
inet_pton(AF_INET, "192.168.0.0", &info->key[1].data);
|
|
info->key[2].prefixlen = 24;
|
|
inet_pton(AF_INET, "192.168.128.0", &info->key[2].data);
|
|
info->key[3].prefixlen = 24;
|
|
inet_pton(AF_INET, "192.168.1.0", &info->key[3].data);
|
|
}
|
|
|
|
static void test_lpm_multi_thread(void)
|
|
{
|
|
LIBBPF_OPTS(bpf_map_create_opts, opts, .map_flags = BPF_F_NO_PREALLOC);
|
|
struct lpm_mt_test_info info[4];
|
|
size_t key_size, value_size;
|
|
pthread_t thread_id[4];
|
|
int i, map_fd;
|
|
void *ret;
|
|
|
|
/* create a trie */
|
|
value_size = sizeof(__u32);
|
|
key_size = sizeof(struct bpf_lpm_trie_key_hdr) + value_size;
|
|
map_fd = bpf_map_create(BPF_MAP_TYPE_LPM_TRIE, NULL, key_size, value_size, 100, &opts);
|
|
|
|
/* create 4 threads to test update, delete, lookup and get_next_key */
|
|
setup_lpm_mt_test_info(&info[0], map_fd);
|
|
for (i = 0; i < 4; i++) {
|
|
if (i != 0)
|
|
memcpy(&info[i], &info[0], sizeof(info[i]));
|
|
info[i].cmd = i;
|
|
assert(pthread_create(&thread_id[i], NULL, &lpm_test_command, &info[i]) == 0);
|
|
}
|
|
|
|
for (i = 0; i < 4; i++)
|
|
assert(pthread_join(thread_id[i], &ret) == 0 && ret == (void *)&info[i]);
|
|
|
|
close(map_fd);
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
int i;
|
|
|
|
/* we want predictable, pseudo random tests */
|
|
srand(0xf00ba1);
|
|
|
|
/* Use libbpf 1.0 API mode */
|
|
libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
|
|
|
|
test_lpm_basic();
|
|
test_lpm_order();
|
|
|
|
/* Test with 8, 16, 24, 32, ... 128 bit prefix length */
|
|
for (i = 1; i <= 16; ++i)
|
|
test_lpm_map(i);
|
|
|
|
test_lpm_ipaddr();
|
|
test_lpm_delete();
|
|
test_lpm_get_next_key();
|
|
test_lpm_multi_thread();
|
|
|
|
printf("test_lpm: OK\n");
|
|
return 0;
|
|
}
|