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Diffstat (limited to 'tools/testing/selftests/bpf/test_lpm_map.c')
-rw-r--r--tools/testing/selftests/bpf/test_lpm_map.c217
1 files changed, 217 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/test_lpm_map.c b/tools/testing/selftests/bpf/test_lpm_map.c
index f61480641b6e..2be87e9ee28d 100644
--- a/tools/testing/selftests/bpf/test_lpm_map.c
+++ b/tools/testing/selftests/bpf/test_lpm_map.c
@@ -14,6 +14,7 @@
#include <errno.h>
#include <inttypes.h>
#include <linux/bpf.h>
+#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -521,6 +522,218 @@ static void test_lpm_delete(void)
close(map_fd);
}
+static void test_lpm_get_next_key(void)
+{
+ struct bpf_lpm_trie_key *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_create_map(BPF_MAP_TYPE_LPM_TRIE, key_size, sizeof(value),
+ 100, BPF_F_NO_PREALLOC);
+ assert(map_fd >= 0);
+
+ /* empty tree. get_next_key should return ENOENT */
+ assert(bpf_map_get_next_key(map_fd, NULL, key_p) == -1 &&
+ errno == 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) == -1 &&
+ errno == 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, "192.168.0.0", 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 == 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) == -1 &&
+ errno == ENOENT);
+
+ /* Add one more element (total three) */
+ 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] == 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) == -1 &&
+ errno == 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) == -1 &&
+ errno == 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 *key_p;
+
+ key_size = sizeof(struct bpf_lpm_trie_key) + 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 *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)
+{
+ 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) + value_size;
+ map_fd = bpf_create_map(BPF_MAP_TYPE_LPM_TRIE, key_size, value_size,
+ 100, BPF_F_NO_PREALLOC);
+
+ /* 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)
{
struct rlimit limit = { RLIM_INFINITY, RLIM_INFINITY };
@@ -545,6 +758,10 @@ int main(void)
test_lpm_delete();
+ test_lpm_get_next_key();
+
+ test_lpm_multi_thread();
+
printf("test_lpm: OK\n");
return 0;
}
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-16 11:22:28 +0000