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linuxdebug/tools/testing/selftests/bpf/test_maps.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* Testsuite for eBPF maps
*
* Copyright (c) 2014 PLUMgrid, http://plumgrid.com
* Copyright (c) 2016 Facebook
*/
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
#include <assert.h>
#include <stdlib.h>
#include <time.h>
#include <sys/wait.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <linux/bpf.h>
#include <bpf/bpf.h>
#include <bpf/libbpf.h>
#include "bpf_util.h"
#include "test_maps.h"
#include "testing_helpers.h"
#ifndef ENOTSUPP
#define ENOTSUPP 524
#endif
int skips;
static struct bpf_map_create_opts map_opts = { .sz = sizeof(map_opts) };
static void test_hashmap(unsigned int task, void *data)
{
long long key, next_key, first_key, value;
int fd;
fd = bpf_map_create(BPF_MAP_TYPE_HASH, NULL, sizeof(key), sizeof(value), 2, &map_opts);
if (fd < 0) {
printf("Failed to create hashmap '%s'!\n", strerror(errno));
exit(1);
}
key = 1;
value = 1234;
/* Insert key=1 element. */
assert(bpf_map_update_elem(fd, &key, &value, BPF_ANY) == 0);
value = 0;
/* BPF_NOEXIST means add new element if it doesn't exist. */
assert(bpf_map_update_elem(fd, &key, &value, BPF_NOEXIST) < 0 &&
/* key=1 already exists. */
errno == EEXIST);
/* -1 is an invalid flag. */
assert(bpf_map_update_elem(fd, &key, &value, -1) < 0 &&
errno == EINVAL);
/* Check that key=1 can be found. */
assert(bpf_map_lookup_elem(fd, &key, &value) == 0 && value == 1234);
key = 2;
value = 1234;
/* Insert key=2 element. */
assert(bpf_map_update_elem(fd, &key, &value, BPF_ANY) == 0);
/* Check that key=2 matches the value and delete it */
assert(bpf_map_lookup_and_delete_elem(fd, &key, &value) == 0 && value == 1234);
/* Check that key=2 is not found. */
assert(bpf_map_lookup_elem(fd, &key, &value) < 0 && errno == ENOENT);
/* BPF_EXIST means update existing element. */
assert(bpf_map_update_elem(fd, &key, &value, BPF_EXIST) < 0 &&
/* key=2 is not there. */
errno == ENOENT);
/* Insert key=2 element. */
assert(bpf_map_update_elem(fd, &key, &value, BPF_NOEXIST) == 0);
/* key=1 and key=2 were inserted, check that key=0 cannot be
* inserted due to max_entries limit.
*/
key = 0;
assert(bpf_map_update_elem(fd, &key, &value, BPF_NOEXIST) < 0 &&
errno == E2BIG);
/* Update existing element, though the map is full. */
key = 1;
assert(bpf_map_update_elem(fd, &key, &value, BPF_EXIST) == 0);
key = 2;
assert(bpf_map_update_elem(fd, &key, &value, BPF_ANY) == 0);
key = 3;
assert(bpf_map_update_elem(fd, &key, &value, BPF_NOEXIST) < 0 &&
errno == E2BIG);
/* Check that key = 0 doesn't exist. */
key = 0;
assert(bpf_map_delete_elem(fd, &key) < 0 && errno == ENOENT);
/* Iterate over two elements. */
assert(bpf_map_get_next_key(fd, NULL, &first_key) == 0 &&
(first_key == 1 || first_key == 2));
assert(bpf_map_get_next_key(fd, &key, &next_key) == 0 &&
(next_key == first_key));
assert(bpf_map_get_next_key(fd, &next_key, &next_key) == 0 &&
(next_key == 1 || next_key == 2) &&
(next_key != first_key));
assert(bpf_map_get_next_key(fd, &next_key, &next_key) < 0 &&
errno == ENOENT);
/* Delete both elements. */
key = 1;
assert(bpf_map_delete_elem(fd, &key) == 0);
key = 2;
assert(bpf_map_delete_elem(fd, &key) == 0);
assert(bpf_map_delete_elem(fd, &key) < 0 && errno == ENOENT);
key = 0;
/* Check that map is empty. */
assert(bpf_map_get_next_key(fd, NULL, &next_key) < 0 &&
errno == ENOENT);
assert(bpf_map_get_next_key(fd, &key, &next_key) < 0 &&
errno == ENOENT);
close(fd);
}
static void test_hashmap_sizes(unsigned int task, void *data)
{
int fd, i, j;
for (i = 1; i <= 512; i <<= 1)
for (j = 1; j <= 1 << 18; j <<= 1) {
fd = bpf_map_create(BPF_MAP_TYPE_HASH, NULL, i, j, 2, &map_opts);
if (fd < 0) {
if (errno == ENOMEM)
return;
printf("Failed to create hashmap key=%d value=%d '%s'\n",
i, j, strerror(errno));
exit(1);
}
close(fd);
usleep(10); /* give kernel time to destroy */
}
}
static void test_hashmap_percpu(unsigned int task, void *data)
{
unsigned int nr_cpus = bpf_num_possible_cpus();
BPF_DECLARE_PERCPU(long, value);
long long key, next_key, first_key;
int expected_key_mask = 0;
int fd, i;
fd = bpf_map_create(BPF_MAP_TYPE_PERCPU_HASH, NULL, sizeof(key),
sizeof(bpf_percpu(value, 0)), 2, &map_opts);
if (fd < 0) {
printf("Failed to create hashmap '%s'!\n", strerror(errno));
exit(1);
}
for (i = 0; i < nr_cpus; i++)
bpf_percpu(value, i) = i + 100;
key = 1;
/* Insert key=1 element. */
assert(!(expected_key_mask & key));
assert(bpf_map_update_elem(fd, &key, value, BPF_ANY) == 0);
/* Lookup and delete elem key=1 and check value. */
assert(bpf_map_lookup_and_delete_elem(fd, &key, value) == 0 &&
bpf_percpu(value,0) == 100);
for (i = 0; i < nr_cpus; i++)
bpf_percpu(value,i) = i + 100;
/* Insert key=1 element which should not exist. */
assert(bpf_map_update_elem(fd, &key, value, BPF_NOEXIST) == 0);
expected_key_mask |= key;
/* BPF_NOEXIST means add new element if it doesn't exist. */
assert(bpf_map_update_elem(fd, &key, value, BPF_NOEXIST) < 0 &&
/* key=1 already exists. */
errno == EEXIST);
/* -1 is an invalid flag. */
assert(bpf_map_update_elem(fd, &key, value, -1) < 0 &&
errno == EINVAL);
/* Check that key=1 can be found. Value could be 0 if the lookup
* was run from a different CPU.
*/
bpf_percpu(value, 0) = 1;
assert(bpf_map_lookup_elem(fd, &key, value) == 0 &&
bpf_percpu(value, 0) == 100);
key = 2;
/* Check that key=2 is not found. */
assert(bpf_map_lookup_elem(fd, &key, value) < 0 && errno == ENOENT);
/* BPF_EXIST means update existing element. */
assert(bpf_map_update_elem(fd, &key, value, BPF_EXIST) < 0 &&
/* key=2 is not there. */
errno == ENOENT);
/* Insert key=2 element. */
assert(!(expected_key_mask & key));
assert(bpf_map_update_elem(fd, &key, value, BPF_NOEXIST) == 0);
expected_key_mask |= key;
/* key=1 and key=2 were inserted, check that key=0 cannot be
* inserted due to max_entries limit.
*/
key = 0;
assert(bpf_map_update_elem(fd, &key, value, BPF_NOEXIST) < 0 &&
errno == E2BIG);
/* Check that key = 0 doesn't exist. */
assert(bpf_map_delete_elem(fd, &key) < 0 && errno == ENOENT);
/* Iterate over two elements. */
assert(bpf_map_get_next_key(fd, NULL, &first_key) == 0 &&
((expected_key_mask & first_key) == first_key));
while (!bpf_map_get_next_key(fd, &key, &next_key)) {
if (first_key) {
assert(next_key == first_key);
first_key = 0;
}
assert((expected_key_mask & next_key) == next_key);
expected_key_mask &= ~next_key;
assert(bpf_map_lookup_elem(fd, &next_key, value) == 0);
for (i = 0; i < nr_cpus; i++)
assert(bpf_percpu(value, i) == i + 100);
key = next_key;
}
assert(errno == ENOENT);
/* Update with BPF_EXIST. */
key = 1;
assert(bpf_map_update_elem(fd, &key, value, BPF_EXIST) == 0);
/* Delete both elements. */
key = 1;
assert(bpf_map_delete_elem(fd, &key) == 0);
key = 2;
assert(bpf_map_delete_elem(fd, &key) == 0);
assert(bpf_map_delete_elem(fd, &key) < 0 && errno == ENOENT);
key = 0;
/* Check that map is empty. */
assert(bpf_map_get_next_key(fd, NULL, &next_key) < 0 &&
errno == ENOENT);
assert(bpf_map_get_next_key(fd, &key, &next_key) < 0 &&
errno == ENOENT);
close(fd);
}
#define VALUE_SIZE 3
static int helper_fill_hashmap(int max_entries)
{
int i, fd, ret;
long long key, value[VALUE_SIZE] = {};
fd = bpf_map_create(BPF_MAP_TYPE_HASH, NULL, sizeof(key), sizeof(value),
max_entries, &map_opts);
CHECK(fd < 0,
"failed to create hashmap",
"err: %s, flags: 0x%x\n", strerror(errno), map_opts.map_flags);
for (i = 0; i < max_entries; i++) {
key = i; value[0] = key;
ret = bpf_map_update_elem(fd, &key, value, BPF_NOEXIST);
CHECK(ret != 0,
"can't update hashmap",
"err: %s\n", strerror(ret));
}
return fd;
}
static void test_hashmap_walk(unsigned int task, void *data)
{
int fd, i, max_entries = 10000;
long long key, value[VALUE_SIZE], next_key;
bool next_key_valid = true;
fd = helper_fill_hashmap(max_entries);
for (i = 0; bpf_map_get_next_key(fd, !i ? NULL : &key,
&next_key) == 0; i++) {
key = next_key;
assert(bpf_map_lookup_elem(fd, &key, value) == 0);
}
assert(i == max_entries);
assert(bpf_map_get_next_key(fd, NULL, &key) == 0);
for (i = 0; next_key_valid; i++) {
next_key_valid = bpf_map_get_next_key(fd, &key, &next_key) == 0;
assert(bpf_map_lookup_elem(fd, &key, value) == 0);
value[0]++;
assert(bpf_map_update_elem(fd, &key, value, BPF_EXIST) == 0);
key = next_key;
}
assert(i == max_entries);
for (i = 0; bpf_map_get_next_key(fd, !i ? NULL : &key,
&next_key) == 0; i++) {
key = next_key;
assert(bpf_map_lookup_elem(fd, &key, value) == 0);
assert(value[0] - 1 == key);
}
assert(i == max_entries);
close(fd);
}
static void test_hashmap_zero_seed(void)
{
int i, first, second, old_flags;
long long key, next_first, next_second;
old_flags = map_opts.map_flags;
map_opts.map_flags |= BPF_F_ZERO_SEED;
first = helper_fill_hashmap(3);
second = helper_fill_hashmap(3);
for (i = 0; ; i++) {
void *key_ptr = !i ? NULL : &key;
if (bpf_map_get_next_key(first, key_ptr, &next_first) != 0)
break;
CHECK(bpf_map_get_next_key(second, key_ptr, &next_second) != 0,
"next_key for second map must succeed",
"key_ptr: %p", key_ptr);
CHECK(next_first != next_second,
"keys must match",
"i: %d first: %lld second: %lld\n", i,
next_first, next_second);
key = next_first;
}
map_opts.map_flags = old_flags;
close(first);
close(second);
}
static void test_arraymap(unsigned int task, void *data)
{
int key, next_key, fd;
long long value;
fd = bpf_map_create(BPF_MAP_TYPE_ARRAY, NULL, sizeof(key), sizeof(value), 2, NULL);
if (fd < 0) {
printf("Failed to create arraymap '%s'!\n", strerror(errno));
exit(1);
}
key = 1;
value = 1234;
/* Insert key=1 element. */
assert(bpf_map_update_elem(fd, &key, &value, BPF_ANY) == 0);
value = 0;
assert(bpf_map_update_elem(fd, &key, &value, BPF_NOEXIST) < 0 &&
errno == EEXIST);
/* Check that key=1 can be found. */
assert(bpf_map_lookup_elem(fd, &key, &value) == 0 && value == 1234);
key = 0;
/* Check that key=0 is also found and zero initialized. */
assert(bpf_map_lookup_elem(fd, &key, &value) == 0 && value == 0);
/* key=0 and key=1 were inserted, check that key=2 cannot be inserted
* due to max_entries limit.
*/
key = 2;
assert(bpf_map_update_elem(fd, &key, &value, BPF_EXIST) < 0 &&
errno == E2BIG);
/* Check that key = 2 doesn't exist. */
assert(bpf_map_lookup_elem(fd, &key, &value) < 0 && errno == ENOENT);
/* Iterate over two elements. */
assert(bpf_map_get_next_key(fd, NULL, &next_key) == 0 &&
next_key == 0);
assert(bpf_map_get_next_key(fd, &key, &next_key) == 0 &&
next_key == 0);
assert(bpf_map_get_next_key(fd, &next_key, &next_key) == 0 &&
next_key == 1);
assert(bpf_map_get_next_key(fd, &next_key, &next_key) < 0 &&
errno == ENOENT);
/* Delete shouldn't succeed. */
key = 1;
assert(bpf_map_delete_elem(fd, &key) < 0 && errno == EINVAL);
close(fd);
}
static void test_arraymap_percpu(unsigned int task, void *data)
{
unsigned int nr_cpus = bpf_num_possible_cpus();
BPF_DECLARE_PERCPU(long, values);
int key, next_key, fd, i;
fd = bpf_map_create(BPF_MAP_TYPE_PERCPU_ARRAY, NULL, sizeof(key),
sizeof(bpf_percpu(values, 0)), 2, NULL);
if (fd < 0) {
printf("Failed to create arraymap '%s'!\n", strerror(errno));
exit(1);
}
for (i = 0; i < nr_cpus; i++)
bpf_percpu(values, i) = i + 100;
key = 1;
/* Insert key=1 element. */
assert(bpf_map_update_elem(fd, &key, values, BPF_ANY) == 0);
bpf_percpu(values, 0) = 0;
assert(bpf_map_update_elem(fd, &key, values, BPF_NOEXIST) < 0 &&
errno == EEXIST);
/* Check that key=1 can be found. */
assert(bpf_map_lookup_elem(fd, &key, values) == 0 &&
bpf_percpu(values, 0) == 100);
key = 0;
/* Check that key=0 is also found and zero initialized. */
assert(bpf_map_lookup_elem(fd, &key, values) == 0 &&
bpf_percpu(values, 0) == 0 &&
bpf_percpu(values, nr_cpus - 1) == 0);
/* Check that key=2 cannot be inserted due to max_entries limit. */
key = 2;
assert(bpf_map_update_elem(fd, &key, values, BPF_EXIST) < 0 &&
errno == E2BIG);
/* Check that key = 2 doesn't exist. */
assert(bpf_map_lookup_elem(fd, &key, values) < 0 && errno == ENOENT);
/* Iterate over two elements. */
assert(bpf_map_get_next_key(fd, NULL, &next_key) == 0 &&
next_key == 0);
assert(bpf_map_get_next_key(fd, &key, &next_key) == 0 &&
next_key == 0);
assert(bpf_map_get_next_key(fd, &next_key, &next_key) == 0 &&
next_key == 1);
assert(bpf_map_get_next_key(fd, &next_key, &next_key) < 0 &&
errno == ENOENT);
/* Delete shouldn't succeed. */
key = 1;
assert(bpf_map_delete_elem(fd, &key) < 0 && errno == EINVAL);
close(fd);
}
static void test_arraymap_percpu_many_keys(void)
{
unsigned int nr_cpus = bpf_num_possible_cpus();
BPF_DECLARE_PERCPU(long, values);
/* nr_keys is not too large otherwise the test stresses percpu
* allocator more than anything else
*/
unsigned int nr_keys = 2000;
int key, fd, i;
fd = bpf_map_create(BPF_MAP_TYPE_PERCPU_ARRAY, NULL, sizeof(key),
sizeof(bpf_percpu(values, 0)), nr_keys, NULL);
if (fd < 0) {
printf("Failed to create per-cpu arraymap '%s'!\n",
strerror(errno));
exit(1);
}
for (i = 0; i < nr_cpus; i++)
bpf_percpu(values, i) = i + 10;
for (key = 0; key < nr_keys; key++)
assert(bpf_map_update_elem(fd, &key, values, BPF_ANY) == 0);
for (key = 0; key < nr_keys; key++) {
for (i = 0; i < nr_cpus; i++)
bpf_percpu(values, i) = 0;
assert(bpf_map_lookup_elem(fd, &key, values) == 0);
for (i = 0; i < nr_cpus; i++)
assert(bpf_percpu(values, i) == i + 10);
}
close(fd);
}
static void test_devmap(unsigned int task, void *data)
{
int fd;
__u32 key, value;
fd = bpf_map_create(BPF_MAP_TYPE_DEVMAP, NULL, sizeof(key), sizeof(value), 2, NULL);
if (fd < 0) {
printf("Failed to create devmap '%s'!\n", strerror(errno));
exit(1);
}
close(fd);
}
static void test_devmap_hash(unsigned int task, void *data)
{
int fd;
__u32 key, value;
fd = bpf_map_create(BPF_MAP_TYPE_DEVMAP_HASH, NULL, sizeof(key), sizeof(value), 2, NULL);
if (fd < 0) {
printf("Failed to create devmap_hash '%s'!\n", strerror(errno));
exit(1);
}
close(fd);
}
static void test_queuemap(unsigned int task, void *data)
{
const int MAP_SIZE = 32;
__u32 vals[MAP_SIZE + MAP_SIZE/2], val;
int fd, i;
/* Fill test values to be used */
for (i = 0; i < MAP_SIZE + MAP_SIZE/2; i++)
vals[i] = rand();
/* Invalid key size */
fd = bpf_map_create(BPF_MAP_TYPE_QUEUE, NULL, 4, sizeof(val), MAP_SIZE, &map_opts);
assert(fd < 0 && errno == EINVAL);
fd = bpf_map_create(BPF_MAP_TYPE_QUEUE, NULL, 0, sizeof(val), MAP_SIZE, &map_opts);
/* Queue map does not support BPF_F_NO_PREALLOC */
if (map_opts.map_flags & BPF_F_NO_PREALLOC) {
assert(fd < 0 && errno == EINVAL);
return;
}
if (fd < 0) {
printf("Failed to create queuemap '%s'!\n", strerror(errno));
exit(1);
}
/* Push MAP_SIZE elements */
for (i = 0; i < MAP_SIZE; i++)
assert(bpf_map_update_elem(fd, NULL, &vals[i], 0) == 0);
/* Check that element cannot be pushed due to max_entries limit */
assert(bpf_map_update_elem(fd, NULL, &val, 0) < 0 &&
errno == E2BIG);
/* Peek element */
assert(bpf_map_lookup_elem(fd, NULL, &val) == 0 && val == vals[0]);
/* Replace half elements */
for (i = MAP_SIZE; i < MAP_SIZE + MAP_SIZE/2; i++)
assert(bpf_map_update_elem(fd, NULL, &vals[i], BPF_EXIST) == 0);
/* Pop all elements */
for (i = MAP_SIZE/2; i < MAP_SIZE + MAP_SIZE/2; i++)
assert(bpf_map_lookup_and_delete_elem(fd, NULL, &val) == 0 &&
val == vals[i]);
/* Check that there are not elements left */
assert(bpf_map_lookup_and_delete_elem(fd, NULL, &val) < 0 &&
errno == ENOENT);
/* Check that non supported functions set errno to EINVAL */
assert(bpf_map_delete_elem(fd, NULL) < 0 && errno == EINVAL);
assert(bpf_map_get_next_key(fd, NULL, NULL) < 0 && errno == EINVAL);
close(fd);
}
static void test_stackmap(unsigned int task, void *data)
{
const int MAP_SIZE = 32;
__u32 vals[MAP_SIZE + MAP_SIZE/2], val;
int fd, i;
/* Fill test values to be used */
for (i = 0; i < MAP_SIZE + MAP_SIZE/2; i++)
vals[i] = rand();
/* Invalid key size */
fd = bpf_map_create(BPF_MAP_TYPE_STACK, NULL, 4, sizeof(val), MAP_SIZE, &map_opts);
assert(fd < 0 && errno == EINVAL);
fd = bpf_map_create(BPF_MAP_TYPE_STACK, NULL, 0, sizeof(val), MAP_SIZE, &map_opts);
/* Stack map does not support BPF_F_NO_PREALLOC */
if (map_opts.map_flags & BPF_F_NO_PREALLOC) {
assert(fd < 0 && errno == EINVAL);
return;
}
if (fd < 0) {
printf("Failed to create stackmap '%s'!\n", strerror(errno));
exit(1);
}
/* Push MAP_SIZE elements */
for (i = 0; i < MAP_SIZE; i++)
assert(bpf_map_update_elem(fd, NULL, &vals[i], 0) == 0);
/* Check that element cannot be pushed due to max_entries limit */
assert(bpf_map_update_elem(fd, NULL, &val, 0) < 0 &&
errno == E2BIG);
/* Peek element */
assert(bpf_map_lookup_elem(fd, NULL, &val) == 0 && val == vals[i - 1]);
/* Replace half elements */
for (i = MAP_SIZE; i < MAP_SIZE + MAP_SIZE/2; i++)
assert(bpf_map_update_elem(fd, NULL, &vals[i], BPF_EXIST) == 0);
/* Pop all elements */
for (i = MAP_SIZE + MAP_SIZE/2 - 1; i >= MAP_SIZE/2; i--)
assert(bpf_map_lookup_and_delete_elem(fd, NULL, &val) == 0 &&
val == vals[i]);
/* Check that there are not elements left */
assert(bpf_map_lookup_and_delete_elem(fd, NULL, &val) < 0 &&
errno == ENOENT);
/* Check that non supported functions set errno to EINVAL */
assert(bpf_map_delete_elem(fd, NULL) < 0 && errno == EINVAL);
assert(bpf_map_get_next_key(fd, NULL, NULL) < 0 && errno == EINVAL);
close(fd);
}
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <sys/select.h>
#include <linux/err.h>
#define SOCKMAP_PARSE_PROG "./sockmap_parse_prog.bpf.o"
#define SOCKMAP_VERDICT_PROG "./sockmap_verdict_prog.bpf.o"
#define SOCKMAP_TCP_MSG_PROG "./sockmap_tcp_msg_prog.bpf.o"
static void test_sockmap(unsigned int tasks, void *data)
{
struct bpf_map *bpf_map_rx, *bpf_map_tx, *bpf_map_msg, *bpf_map_break;
int map_fd_msg = 0, map_fd_rx = 0, map_fd_tx = 0, map_fd_break;
struct bpf_object *parse_obj, *verdict_obj, *msg_obj;
int ports[] = {50200, 50201, 50202, 50204};
int err, i, fd, udp, sfd[6] = {0xdeadbeef};
u8 buf[20] = {0x0, 0x5, 0x3, 0x2, 0x1, 0x0};
int parse_prog, verdict_prog, msg_prog;
struct sockaddr_in addr;
int one = 1, s, sc, rc;
struct timeval to;
__u32 key, value;
pid_t pid[tasks];
fd_set w;
/* Create some sockets to use with sockmap */
for (i = 0; i < 2; i++) {
sfd[i] = socket(AF_INET, SOCK_STREAM, 0);
if (sfd[i] < 0)
goto out;
err = setsockopt(sfd[i], SOL_SOCKET, SO_REUSEADDR,
(char *)&one, sizeof(one));
if (err) {
printf("failed to setsockopt\n");
goto out;
}
err = ioctl(sfd[i], FIONBIO, (char *)&one);
if (err < 0) {
printf("failed to ioctl\n");
goto out;
}
memset(&addr, 0, sizeof(struct sockaddr_in));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr("127.0.0.1");
addr.sin_port = htons(ports[i]);
err = bind(sfd[i], (struct sockaddr *)&addr, sizeof(addr));
if (err < 0) {
printf("failed to bind: err %i: %i:%i\n",
err, i, sfd[i]);
goto out;
}
err = listen(sfd[i], 32);
if (err < 0) {
printf("failed to listen\n");
goto out;
}
}
for (i = 2; i < 4; i++) {
sfd[i] = socket(AF_INET, SOCK_STREAM, 0);
if (sfd[i] < 0)
goto out;
err = setsockopt(sfd[i], SOL_SOCKET, SO_REUSEADDR,
(char *)&one, sizeof(one));
if (err) {
printf("set sock opt\n");
goto out;
}
memset(&addr, 0, sizeof(struct sockaddr_in));
addr.sin_family = AF_INET;
addr.sin_addr.s_addr = inet_addr("127.0.0.1");
addr.sin_port = htons(ports[i - 2]);
err = connect(sfd[i], (struct sockaddr *)&addr, sizeof(addr));
if (err) {
printf("failed to connect\n");
goto out;
}
}
for (i = 4; i < 6; i++) {
sfd[i] = accept(sfd[i - 4], NULL, NULL);
if (sfd[i] < 0) {
printf("accept failed\n");
goto out;
}
}
/* Test sockmap with connected sockets */
fd = bpf_map_create(BPF_MAP_TYPE_SOCKMAP, NULL,
sizeof(key), sizeof(value),
6, NULL);
if (fd < 0) {
if (!libbpf_probe_bpf_map_type(BPF_MAP_TYPE_SOCKMAP, NULL)) {
printf("%s SKIP (unsupported map type BPF_MAP_TYPE_SOCKMAP)\n",
__func__);
skips++;
for (i = 0; i < 6; i++)
close(sfd[i]);
return;
}
printf("Failed to create sockmap %i\n", fd);
goto out_sockmap;
}
/* Test update with unsupported UDP socket */
udp = socket(AF_INET, SOCK_DGRAM, 0);
i = 0;
err = bpf_map_update_elem(fd, &i, &udp, BPF_ANY);
if (err) {
printf("Failed socket update SOCK_DGRAM '%i:%i'\n",
i, udp);
goto out_sockmap;
}
close(udp);
/* Test update without programs */
for (i = 0; i < 6; i++) {
err = bpf_map_update_elem(fd, &i, &sfd[i], BPF_ANY);
if (err) {
printf("Failed noprog update sockmap '%i:%i'\n",
i, sfd[i]);
goto out_sockmap;
}
}
/* Test attaching/detaching bad fds */
err = bpf_prog_attach(-1, fd, BPF_SK_SKB_STREAM_PARSER, 0);
if (!err) {
printf("Failed invalid parser prog attach\n");
goto out_sockmap;
}
err = bpf_prog_attach(-1, fd, BPF_SK_SKB_STREAM_VERDICT, 0);
if (!err) {
printf("Failed invalid verdict prog attach\n");
goto out_sockmap;
}
err = bpf_prog_attach(-1, fd, BPF_SK_MSG_VERDICT, 0);
if (!err) {
printf("Failed invalid msg verdict prog attach\n");
goto out_sockmap;
}
err = bpf_prog_attach(-1, fd, __MAX_BPF_ATTACH_TYPE, 0);
if (!err) {
printf("Failed unknown prog attach\n");
goto out_sockmap;
}
err = bpf_prog_detach(fd, BPF_SK_SKB_STREAM_PARSER);
if (!err) {
printf("Failed empty parser prog detach\n");
goto out_sockmap;
}
err = bpf_prog_detach(fd, BPF_SK_SKB_STREAM_VERDICT);
if (!err) {
printf("Failed empty verdict prog detach\n");
goto out_sockmap;
}
err = bpf_prog_detach(fd, BPF_SK_MSG_VERDICT);
if (!err) {
printf("Failed empty msg verdict prog detach\n");
goto out_sockmap;
}
err = bpf_prog_detach(fd, __MAX_BPF_ATTACH_TYPE);
if (!err) {
printf("Detach invalid prog successful\n");
goto out_sockmap;
}
/* Load SK_SKB program and Attach */
err = bpf_prog_test_load(SOCKMAP_PARSE_PROG,
BPF_PROG_TYPE_SK_SKB, &parse_obj, &parse_prog);
if (err) {
printf("Failed to load SK_SKB parse prog\n");
goto out_sockmap;
}
err = bpf_prog_test_load(SOCKMAP_TCP_MSG_PROG,
BPF_PROG_TYPE_SK_MSG, &msg_obj, &msg_prog);
if (err) {
printf("Failed to load SK_SKB msg prog\n");
goto out_sockmap;
}
err = bpf_prog_test_load(SOCKMAP_VERDICT_PROG,
BPF_PROG_TYPE_SK_SKB, &verdict_obj, &verdict_prog);
if (err) {
printf("Failed to load SK_SKB verdict prog\n");
goto out_sockmap;
}
bpf_map_rx = bpf_object__find_map_by_name(verdict_obj, "sock_map_rx");
if (!bpf_map_rx) {
printf("Failed to load map rx from verdict prog\n");
goto out_sockmap;
}
map_fd_rx = bpf_map__fd(bpf_map_rx);
if (map_fd_rx < 0) {
printf("Failed to get map rx fd\n");
goto out_sockmap;
}
bpf_map_tx = bpf_object__find_map_by_name(verdict_obj, "sock_map_tx");
if (!bpf_map_tx) {
printf("Failed to load map tx from verdict prog\n");
goto out_sockmap;
}
map_fd_tx = bpf_map__fd(bpf_map_tx);
if (map_fd_tx < 0) {
printf("Failed to get map tx fd\n");
goto out_sockmap;
}
bpf_map_msg = bpf_object__find_map_by_name(verdict_obj, "sock_map_msg");
if (!bpf_map_msg) {
printf("Failed to load map msg from msg_verdict prog\n");
goto out_sockmap;
}
map_fd_msg = bpf_map__fd(bpf_map_msg);
if (map_fd_msg < 0) {
printf("Failed to get map msg fd\n");
goto out_sockmap;
}
bpf_map_break = bpf_object__find_map_by_name(verdict_obj, "sock_map_break");
if (!bpf_map_break) {
printf("Failed to load map tx from verdict prog\n");
goto out_sockmap;
}
map_fd_break = bpf_map__fd(bpf_map_break);
if (map_fd_break < 0) {
printf("Failed to get map tx fd\n");
goto out_sockmap;
}
err = bpf_prog_attach(parse_prog, map_fd_break,
BPF_SK_SKB_STREAM_PARSER, 0);
if (!err) {
printf("Allowed attaching SK_SKB program to invalid map\n");
goto out_sockmap;
}
err = bpf_prog_attach(parse_prog, map_fd_rx,
BPF_SK_SKB_STREAM_PARSER, 0);
if (err) {
printf("Failed stream parser bpf prog attach\n");
goto out_sockmap;
}
err = bpf_prog_attach(verdict_prog, map_fd_rx,
BPF_SK_SKB_STREAM_VERDICT, 0);
if (err) {
printf("Failed stream verdict bpf prog attach\n");
goto out_sockmap;
}
err = bpf_prog_attach(msg_prog, map_fd_msg, BPF_SK_MSG_VERDICT, 0);
if (err) {
printf("Failed msg verdict bpf prog attach\n");
goto out_sockmap;
}
err = bpf_prog_attach(verdict_prog, map_fd_rx,
__MAX_BPF_ATTACH_TYPE, 0);
if (!err) {
printf("Attached unknown bpf prog\n");
goto out_sockmap;
}
/* Test map update elem afterwards fd lives in fd and map_fd */
for (i = 2; i < 6; i++) {
err = bpf_map_update_elem(map_fd_rx, &i, &sfd[i], BPF_ANY);
if (err) {
printf("Failed map_fd_rx update sockmap %i '%i:%i'\n",
err, i, sfd[i]);
goto out_sockmap;
}
err = bpf_map_update_elem(map_fd_tx, &i, &sfd[i], BPF_ANY);
if (err) {
printf("Failed map_fd_tx update sockmap %i '%i:%i'\n",
err, i, sfd[i]);
goto out_sockmap;
}
}
/* Test map delete elem and remove send/recv sockets */
for (i = 2; i < 4; i++) {
err = bpf_map_delete_elem(map_fd_rx, &i);
if (err) {
printf("Failed delete sockmap rx %i '%i:%i'\n",
err, i, sfd[i]);
goto out_sockmap;
}
err = bpf_map_delete_elem(map_fd_tx, &i);
if (err) {
printf("Failed delete sockmap tx %i '%i:%i'\n",
err, i, sfd[i]);
goto out_sockmap;
}
}
/* Put sfd[2] (sending fd below) into msg map to test sendmsg bpf */
i = 0;
err = bpf_map_update_elem(map_fd_msg, &i, &sfd[2], BPF_ANY);
if (err) {
printf("Failed map_fd_msg update sockmap %i\n", err);
goto out_sockmap;
}
/* Test map send/recv */
for (i = 0; i < 2; i++) {
buf[0] = i;
buf[1] = 0x5;
sc = send(sfd[2], buf, 20, 0);
if (sc < 0) {
printf("Failed sockmap send\n");
goto out_sockmap;
}
FD_ZERO(&w);
FD_SET(sfd[3], &w);
to.tv_sec = 30;
to.tv_usec = 0;
s = select(sfd[3] + 1, &w, NULL, NULL, &to);
if (s == -1) {
perror("Failed sockmap select()");
goto out_sockmap;
} else if (!s) {
printf("Failed sockmap unexpected timeout\n");
goto out_sockmap;
}
if (!FD_ISSET(sfd[3], &w)) {
printf("Failed sockmap select/recv\n");
goto out_sockmap;
}
rc = recv(sfd[3], buf, sizeof(buf), 0);
if (rc < 0) {
printf("Failed sockmap recv\n");
goto out_sockmap;
}
}
/* Negative null entry lookup from datapath should be dropped */
buf[0] = 1;
buf[1] = 12;
sc = send(sfd[2], buf, 20, 0);
if (sc < 0) {
printf("Failed sockmap send\n");
goto out_sockmap;
}
/* Push fd into same slot */
i = 2;
err = bpf_map_update_elem(fd, &i, &sfd[i], BPF_NOEXIST);
if (!err) {
printf("Failed allowed sockmap dup slot BPF_NOEXIST\n");
goto out_sockmap;
}
err = bpf_map_update_elem(fd, &i, &sfd[i], BPF_ANY);
if (err) {
printf("Failed sockmap update new slot BPF_ANY\n");
goto out_sockmap;
}
err = bpf_map_update_elem(fd, &i, &sfd[i], BPF_EXIST);
if (err) {
printf("Failed sockmap update new slot BPF_EXIST\n");
goto out_sockmap;
}
/* Delete the elems without programs */
for (i = 2; i < 6; i++) {
err = bpf_map_delete_elem(fd, &i);
if (err) {
printf("Failed delete sockmap %i '%i:%i'\n",
err, i, sfd[i]);
}
}
/* Test having multiple maps open and set with programs on same fds */
err = bpf_prog_attach(parse_prog, fd,
BPF_SK_SKB_STREAM_PARSER, 0);
if (err) {
printf("Failed fd bpf parse prog attach\n");
goto out_sockmap;
}
err = bpf_prog_attach(verdict_prog, fd,
BPF_SK_SKB_STREAM_VERDICT, 0);
if (err) {
printf("Failed fd bpf verdict prog attach\n");
goto out_sockmap;
}
for (i = 4; i < 6; i++) {
err = bpf_map_update_elem(fd, &i, &sfd[i], BPF_ANY);
if (!err) {
printf("Failed allowed duplicate programs in update ANY sockmap %i '%i:%i'\n",
err, i, sfd[i]);
goto out_sockmap;
}
err = bpf_map_update_elem(fd, &i, &sfd[i], BPF_NOEXIST);
if (!err) {
printf("Failed allowed duplicate program in update NOEXIST sockmap %i '%i:%i'\n",
err, i, sfd[i]);
goto out_sockmap;
}
err = bpf_map_update_elem(fd, &i, &sfd[i], BPF_EXIST);
if (!err) {
printf("Failed allowed duplicate program in update EXIST sockmap %i '%i:%i'\n",
err, i, sfd[i]);
goto out_sockmap;
}
}
/* Test tasks number of forked operations */
for (i = 0; i < tasks; i++) {
pid[i] = fork();
if (pid[i] == 0) {
for (i = 0; i < 6; i++) {
bpf_map_delete_elem(map_fd_tx, &i);
bpf_map_delete_elem(map_fd_rx, &i);
bpf_map_update_elem(map_fd_tx, &i,
&sfd[i], BPF_ANY);
bpf_map_update_elem(map_fd_rx, &i,
&sfd[i], BPF_ANY);
}
exit(0);
} else if (pid[i] == -1) {
printf("Couldn't spawn #%d process!\n", i);
exit(1);
}
}
for (i = 0; i < tasks; i++) {
int status;
assert(waitpid(pid[i], &status, 0) == pid[i]);
assert(status == 0);
}
err = bpf_prog_detach2(parse_prog, map_fd_rx, __MAX_BPF_ATTACH_TYPE);
if (!err) {
printf("Detached an invalid prog type.\n");
goto out_sockmap;
}
err = bpf_prog_detach2(parse_prog, map_fd_rx, BPF_SK_SKB_STREAM_PARSER);
if (err) {
printf("Failed parser prog detach\n");
goto out_sockmap;
}
err = bpf_prog_detach2(verdict_prog, map_fd_rx, BPF_SK_SKB_STREAM_VERDICT);
if (err) {
printf("Failed parser prog detach\n");
goto out_sockmap;
}
/* Test map close sockets and empty maps */
for (i = 0; i < 6; i++) {
bpf_map_delete_elem(map_fd_tx, &i);
bpf_map_delete_elem(map_fd_rx, &i);
close(sfd[i]);
}
close(fd);
close(map_fd_rx);
bpf_object__close(parse_obj);
bpf_object__close(msg_obj);
bpf_object__close(verdict_obj);
return;
out:
for (i = 0; i < 6; i++)
close(sfd[i]);
printf("Failed to create sockmap '%i:%s'!\n", i, strerror(errno));
exit(1);
out_sockmap:
for (i = 0; i < 6; i++) {
if (map_fd_tx)
bpf_map_delete_elem(map_fd_tx, &i);
if (map_fd_rx)
bpf_map_delete_elem(map_fd_rx, &i);
close(sfd[i]);
}
close(fd);
exit(1);
}
#define MAPINMAP_PROG "./test_map_in_map.bpf.o"
#define MAPINMAP_INVALID_PROG "./test_map_in_map_invalid.bpf.o"
static void test_map_in_map(void)
{
struct bpf_object *obj;
struct bpf_map *map;
int mim_fd, fd, err;
int pos = 0;
struct bpf_map_info info = {};
__u32 len = sizeof(info);
__u32 id = 0;
libbpf_print_fn_t old_print_fn;
obj = bpf_object__open(MAPINMAP_PROG);
fd = bpf_map_create(BPF_MAP_TYPE_HASH, NULL, sizeof(int), sizeof(int), 2, NULL);
if (fd < 0) {
printf("Failed to create hashmap '%s'!\n", strerror(errno));
exit(1);
}
map = bpf_object__find_map_by_name(obj, "mim_array");
if (!map) {
printf("Failed to load array of maps from test prog\n");
goto out_map_in_map;
}
err = bpf_map__set_inner_map_fd(map, fd);
if (err) {
printf("Failed to set inner_map_fd for array of maps\n");
goto out_map_in_map;
}
map = bpf_object__find_map_by_name(obj, "mim_hash");
if (!map) {
printf("Failed to load hash of maps from test prog\n");
goto out_map_in_map;
}
err = bpf_map__set_inner_map_fd(map, fd);
if (err) {
printf("Failed to set inner_map_fd for hash of maps\n");
goto out_map_in_map;
}
bpf_object__load(obj);
map = bpf_object__find_map_by_name(obj, "mim_array");
if (!map) {
printf("Failed to load array of maps from test prog\n");
goto out_map_in_map;
}
mim_fd = bpf_map__fd(map);
if (mim_fd < 0) {
printf("Failed to get descriptor for array of maps\n");
goto out_map_in_map;
}
err = bpf_map_update_elem(mim_fd, &pos, &fd, 0);
if (err) {
printf("Failed to update array of maps\n");
goto out_map_in_map;
}
map = bpf_object__find_map_by_name(obj, "mim_hash");
if (!map) {
printf("Failed to load hash of maps from test prog\n");
goto out_map_in_map;
}
mim_fd = bpf_map__fd(map);
if (mim_fd < 0) {
printf("Failed to get descriptor for hash of maps\n");
goto out_map_in_map;
}
err = bpf_map_update_elem(mim_fd, &pos, &fd, 0);
if (err) {
printf("Failed to update hash of maps\n");
goto out_map_in_map;
}
close(fd);
fd = -1;
bpf_object__close(obj);
/* Test that failing bpf_object__create_map() destroys the inner map */
obj = bpf_object__open(MAPINMAP_INVALID_PROG);
err = libbpf_get_error(obj);
if (err) {
printf("Failed to load %s program: %d %d",
MAPINMAP_INVALID_PROG, err, errno);
goto out_map_in_map;
}
map = bpf_object__find_map_by_name(obj, "mim");
if (!map) {
printf("Failed to load array of maps from test prog\n");
goto out_map_in_map;
}
old_print_fn = libbpf_set_print(NULL);
err = bpf_object__load(obj);
if (!err) {
printf("Loading obj supposed to fail\n");
goto out_map_in_map;
}
libbpf_set_print(old_print_fn);
/* Iterate over all maps to check whether the internal map
* ("mim.internal") has been destroyed.
*/
while (true) {
err = bpf_map_get_next_id(id, &id);
if (err) {
if (errno == ENOENT)
break;
printf("Failed to get next map: %d", errno);
goto out_map_in_map;
}
fd = bpf_map_get_fd_by_id(id);
if (fd < 0) {
if (errno == ENOENT)
continue;
printf("Failed to get map by id %u: %d", id, errno);
goto out_map_in_map;
}
err = bpf_obj_get_info_by_fd(fd, &info, &len);
if (err) {
printf("Failed to get map info by fd %d: %d", fd,
errno);
goto out_map_in_map;
}
if (!strcmp(info.name, "mim.inner")) {
printf("Inner map mim.inner was not destroyed\n");
goto out_map_in_map;
}
close(fd);
}
bpf_object__close(obj);
return;
out_map_in_map:
if (fd >= 0)
close(fd);
exit(1);
}
#define MAP_SIZE (32 * 1024)
static void test_map_large(void)
{
struct bigkey {
int a;
char b[4096];
long long c;
} key;
int fd, i, value;
fd = bpf_map_create(BPF_MAP_TYPE_HASH, NULL, sizeof(key), sizeof(value),
MAP_SIZE, &map_opts);
if (fd < 0) {
printf("Failed to create large map '%s'!\n", strerror(errno));
exit(1);
}
for (i = 0; i < MAP_SIZE; i++) {
key = (struct bigkey) { .c = i };
value = i;
assert(bpf_map_update_elem(fd, &key, &value, BPF_NOEXIST) == 0);
}
key.c = -1;
assert(bpf_map_update_elem(fd, &key, &value, BPF_NOEXIST) < 0 &&
errno == E2BIG);
/* Iterate through all elements. */
assert(bpf_map_get_next_key(fd, NULL, &key) == 0);
key.c = -1;
for (i = 0; i < MAP_SIZE; i++)
assert(bpf_map_get_next_key(fd, &key, &key) == 0);
assert(bpf_map_get_next_key(fd, &key, &key) < 0 && errno == ENOENT);
key.c = 0;
assert(bpf_map_lookup_elem(fd, &key, &value) == 0 && value == 0);
key.a = 1;
assert(bpf_map_lookup_elem(fd, &key, &value) < 0 && errno == ENOENT);
close(fd);
}
#define run_parallel(N, FN, DATA) \
printf("Fork %u tasks to '" #FN "'\n", N); \
__run_parallel(N, FN, DATA)
static void __run_parallel(unsigned int tasks,
void (*fn)(unsigned int task, void *data),
void *data)
{
pid_t pid[tasks];
int i;
fflush(stdout);
for (i = 0; i < tasks; i++) {
pid[i] = fork();
if (pid[i] == 0) {
fn(i, data);
exit(0);
} else if (pid[i] == -1) {
printf("Couldn't spawn #%d process!\n", i);
exit(1);
}
}
for (i = 0; i < tasks; i++) {
int status;
assert(waitpid(pid[i], &status, 0) == pid[i]);
assert(status == 0);
}
}
static void test_map_stress(void)
{
run_parallel(100, test_hashmap_walk, NULL);
run_parallel(100, test_hashmap, NULL);
run_parallel(100, test_hashmap_percpu, NULL);
run_parallel(100, test_hashmap_sizes, NULL);
run_parallel(100, test_arraymap, NULL);
run_parallel(100, test_arraymap_percpu, NULL);
}
#define TASKS 100
#define DO_UPDATE 1
#define DO_DELETE 0
#define MAP_RETRIES 20
#define MAX_DELAY_US 50000
#define MIN_DELAY_RANGE_US 5000
static int map_update_retriable(int map_fd, const void *key, const void *value,
int flags, int attempts)
{
int delay = rand() % MIN_DELAY_RANGE_US;
while (bpf_map_update_elem(map_fd, key, value, flags)) {
if (!attempts || (errno != EAGAIN && errno != EBUSY))
return -errno;
if (delay <= MAX_DELAY_US / 2)
delay *= 2;
usleep(delay);
attempts--;
}
return 0;
}
static int map_delete_retriable(int map_fd, const void *key, int attempts)
{
int delay = rand() % MIN_DELAY_RANGE_US;
while (bpf_map_delete_elem(map_fd, key)) {
if (!attempts || (errno != EAGAIN && errno != EBUSY))
return -errno;
if (delay <= MAX_DELAY_US / 2)
delay *= 2;
usleep(delay);
attempts--;
}
return 0;
}
static void test_update_delete(unsigned int fn, void *data)
{
int do_update = ((int *)data)[1];
int fd = ((int *)data)[0];
int i, key, value, err;
if (fn & 1)
test_hashmap_walk(fn, NULL);
for (i = fn; i < MAP_SIZE; i += TASKS) {
key = value = i;
if (do_update) {
err = map_update_retriable(fd, &key, &value, BPF_NOEXIST, MAP_RETRIES);
if (err)
printf("error %d %d\n", err, errno);
assert(err == 0);
err = map_update_retriable(fd, &key, &value, BPF_EXIST, MAP_RETRIES);
if (err)
printf("error %d %d\n", err, errno);
assert(err == 0);
} else {
err = map_delete_retriable(fd, &key, MAP_RETRIES);
if (err)
printf("error %d %d\n", err, errno);
assert(err == 0);
}
}
}
static void test_map_parallel(void)
{
int i, fd, key = 0, value = 0, j = 0;
int data[2];
fd = bpf_map_create(BPF_MAP_TYPE_HASH, NULL, sizeof(key), sizeof(value),
MAP_SIZE, &map_opts);
if (fd < 0) {
printf("Failed to create map for parallel test '%s'!\n",
strerror(errno));
exit(1);
}
again:
/* Use the same fd in children to add elements to this map:
* child_0 adds key=0, key=1024, key=2048, ...
* child_1 adds key=1, key=1025, key=2049, ...
* child_1023 adds key=1023, ...
*/
data[0] = fd;
data[1] = DO_UPDATE;
run_parallel(TASKS, test_update_delete, data);
/* Check that key=0 is already there. */
assert(bpf_map_update_elem(fd, &key, &value, BPF_NOEXIST) < 0 &&
errno == EEXIST);
/* Check that all elements were inserted. */
assert(bpf_map_get_next_key(fd, NULL, &key) == 0);
key = -1;
for (i = 0; i < MAP_SIZE; i++)
assert(bpf_map_get_next_key(fd, &key, &key) == 0);
assert(bpf_map_get_next_key(fd, &key, &key) < 0 && errno == ENOENT);
/* Another check for all elements */
for (i = 0; i < MAP_SIZE; i++) {
key = MAP_SIZE - i - 1;
assert(bpf_map_lookup_elem(fd, &key, &value) == 0 &&
value == key);
}
/* Now let's delete all elemenets in parallel. */
data[1] = DO_DELETE;
run_parallel(TASKS, test_update_delete, data);
/* Nothing should be left. */
key = -1;
assert(bpf_map_get_next_key(fd, NULL, &key) < 0 && errno == ENOENT);
assert(bpf_map_get_next_key(fd, &key, &key) < 0 && errno == ENOENT);
key = 0;
bpf_map_delete_elem(fd, &key);
if (j++ < 5)
goto again;
close(fd);
}
static void test_map_rdonly(void)
{
int fd, key = 0, value = 0;
__u32 old_flags;
old_flags = map_opts.map_flags;
map_opts.map_flags |= BPF_F_RDONLY;
fd = bpf_map_create(BPF_MAP_TYPE_HASH, NULL, sizeof(key), sizeof(value),
MAP_SIZE, &map_opts);
map_opts.map_flags = old_flags;
if (fd < 0) {
printf("Failed to create map for read only test '%s'!\n",
strerror(errno));
exit(1);
}
key = 1;
value = 1234;
/* Try to insert key=1 element. */
assert(bpf_map_update_elem(fd, &key, &value, BPF_ANY) < 0 &&
errno == EPERM);
/* Check that key=1 is not found. */
assert(bpf_map_lookup_elem(fd, &key, &value) < 0 && errno == ENOENT);
assert(bpf_map_get_next_key(fd, &key, &value) < 0 && errno == ENOENT);
close(fd);
}
static void test_map_wronly_hash(void)
{
int fd, key = 0, value = 0;
__u32 old_flags;
old_flags = map_opts.map_flags;
map_opts.map_flags |= BPF_F_WRONLY;
fd = bpf_map_create(BPF_MAP_TYPE_HASH, NULL, sizeof(key), sizeof(value),
MAP_SIZE, &map_opts);
map_opts.map_flags = old_flags;
if (fd < 0) {
printf("Failed to create map for write only test '%s'!\n",
strerror(errno));
exit(1);
}
key = 1;
value = 1234;
/* Insert key=1 element. */
assert(bpf_map_update_elem(fd, &key, &value, BPF_ANY) == 0);
/* Check that reading elements and keys from the map is not allowed. */
assert(bpf_map_lookup_elem(fd, &key, &value) < 0 && errno == EPERM);
assert(bpf_map_get_next_key(fd, &key, &value) < 0 && errno == EPERM);
close(fd);
}
static void test_map_wronly_stack_or_queue(enum bpf_map_type map_type)
{
int fd, value = 0;
__u32 old_flags;
assert(map_type == BPF_MAP_TYPE_QUEUE ||
map_type == BPF_MAP_TYPE_STACK);
old_flags = map_opts.map_flags;
map_opts.map_flags |= BPF_F_WRONLY;
fd = bpf_map_create(map_type, NULL, 0, sizeof(value), MAP_SIZE, &map_opts);
map_opts.map_flags = old_flags;
/* Stack/Queue maps do not support BPF_F_NO_PREALLOC */
if (map_opts.map_flags & BPF_F_NO_PREALLOC) {
assert(fd < 0 && errno == EINVAL);
return;
}
if (fd < 0) {
printf("Failed to create map '%s'!\n", strerror(errno));
exit(1);
}
value = 1234;
assert(bpf_map_update_elem(fd, NULL, &value, BPF_ANY) == 0);
/* Peek element should fail */
assert(bpf_map_lookup_elem(fd, NULL, &value) < 0 && errno == EPERM);
/* Pop element should fail */
assert(bpf_map_lookup_and_delete_elem(fd, NULL, &value) < 0 &&
errno == EPERM);
close(fd);
}
static void test_map_wronly(void)
{
test_map_wronly_hash();
test_map_wronly_stack_or_queue(BPF_MAP_TYPE_STACK);
test_map_wronly_stack_or_queue(BPF_MAP_TYPE_QUEUE);
}
static void prepare_reuseport_grp(int type, int map_fd, size_t map_elem_size,
__s64 *fds64, __u64 *sk_cookies,
unsigned int n)
{
socklen_t optlen, addrlen;
struct sockaddr_in6 s6;
const __u32 index0 = 0;
const int optval = 1;
unsigned int i;
u64 sk_cookie;
void *value;
__s32 fd32;
__s64 fd64;
int err;
s6.sin6_family = AF_INET6;
s6.sin6_addr = in6addr_any;
s6.sin6_port = 0;
addrlen = sizeof(s6);
optlen = sizeof(sk_cookie);
for (i = 0; i < n; i++) {
fd64 = socket(AF_INET6, type, 0);
CHECK(fd64 == -1, "socket()",
"sock_type:%d fd64:%lld errno:%d\n",
type, fd64, errno);
err = setsockopt(fd64, SOL_SOCKET, SO_REUSEPORT,
&optval, sizeof(optval));
CHECK(err == -1, "setsockopt(SO_REUSEPORT)",
"err:%d errno:%d\n", err, errno);
/* reuseport_array does not allow unbound sk */
if (map_elem_size == sizeof(__u64))
value = &fd64;
else {
assert(map_elem_size == sizeof(__u32));
fd32 = (__s32)fd64;
value = &fd32;
}
err = bpf_map_update_elem(map_fd, &index0, value, BPF_ANY);
CHECK(err >= 0 || errno != EINVAL,
"reuseport array update unbound sk",
"sock_type:%d err:%d errno:%d\n",
type, err, errno);
err = bind(fd64, (struct sockaddr *)&s6, sizeof(s6));
CHECK(err == -1, "bind()",
"sock_type:%d err:%d errno:%d\n", type, err, errno);
if (i == 0) {
err = getsockname(fd64, (struct sockaddr *)&s6,
&addrlen);
CHECK(err == -1, "getsockname()",
"sock_type:%d err:%d errno:%d\n",
type, err, errno);
}
err = getsockopt(fd64, SOL_SOCKET, SO_COOKIE, &sk_cookie,
&optlen);
CHECK(err == -1, "getsockopt(SO_COOKIE)",
"sock_type:%d err:%d errno:%d\n", type, err, errno);
if (type == SOCK_STREAM) {
/*
* reuseport_array does not allow
* non-listening tcp sk.
*/
err = bpf_map_update_elem(map_fd, &index0, value,
BPF_ANY);
CHECK(err >= 0 || errno != EINVAL,
"reuseport array update non-listening sk",
"sock_type:%d err:%d errno:%d\n",
type, err, errno);
err = listen(fd64, 0);
CHECK(err == -1, "listen()",
"sock_type:%d, err:%d errno:%d\n",
type, err, errno);
}
fds64[i] = fd64;
sk_cookies[i] = sk_cookie;
}
}
static void test_reuseport_array(void)
{
#define REUSEPORT_FD_IDX(err, last) ({ (err) ? last : !last; })
const __u32 array_size = 4, index0 = 0, index3 = 3;
int types[2] = { SOCK_STREAM, SOCK_DGRAM }, type;
__u64 grpa_cookies[2], sk_cookie, map_cookie;
__s64 grpa_fds64[2] = { -1, -1 }, fd64 = -1;
const __u32 bad_index = array_size;
int map_fd, err, t, f;
__u32 fds_idx = 0;
int fd;
map_fd = bpf_map_create(BPF_MAP_TYPE_REUSEPORT_SOCKARRAY, NULL,
sizeof(__u32), sizeof(__u64), array_size, NULL);
CHECK(map_fd < 0, "reuseport array create",
"map_fd:%d, errno:%d\n", map_fd, errno);
/* Test lookup/update/delete with invalid index */
err = bpf_map_delete_elem(map_fd, &bad_index);
CHECK(err >= 0 || errno != E2BIG, "reuseport array del >=max_entries",
"err:%d errno:%d\n", err, errno);
err = bpf_map_update_elem(map_fd, &bad_index, &fd64, BPF_ANY);
CHECK(err >= 0 || errno != E2BIG,
"reuseport array update >=max_entries",
"err:%d errno:%d\n", err, errno);
err = bpf_map_lookup_elem(map_fd, &bad_index, &map_cookie);
CHECK(err >= 0 || errno != ENOENT,
"reuseport array update >=max_entries",
"err:%d errno:%d\n", err, errno);
/* Test lookup/delete non existence elem */
err = bpf_map_lookup_elem(map_fd, &index3, &map_cookie);
CHECK(err >= 0 || errno != ENOENT,
"reuseport array lookup not-exist elem",
"err:%d errno:%d\n", err, errno);
err = bpf_map_delete_elem(map_fd, &index3);
CHECK(err >= 0 || errno != ENOENT,
"reuseport array del not-exist elem",
"err:%d errno:%d\n", err, errno);
for (t = 0; t < ARRAY_SIZE(types); t++) {
type = types[t];
prepare_reuseport_grp(type, map_fd, sizeof(__u64), grpa_fds64,
grpa_cookies, ARRAY_SIZE(grpa_fds64));
/* Test BPF_* update flags */
/* BPF_EXIST failure case */
err = bpf_map_update_elem(map_fd, &index3, &grpa_fds64[fds_idx],
BPF_EXIST);
CHECK(err >= 0 || errno != ENOENT,
"reuseport array update empty elem BPF_EXIST",
"sock_type:%d err:%d errno:%d\n",
type, err, errno);
fds_idx = REUSEPORT_FD_IDX(err, fds_idx);
/* BPF_NOEXIST success case */
err = bpf_map_update_elem(map_fd, &index3, &grpa_fds64[fds_idx],
BPF_NOEXIST);
CHECK(err < 0,
"reuseport array update empty elem BPF_NOEXIST",
"sock_type:%d err:%d errno:%d\n",
type, err, errno);
fds_idx = REUSEPORT_FD_IDX(err, fds_idx);
/* BPF_EXIST success case. */
err = bpf_map_update_elem(map_fd, &index3, &grpa_fds64[fds_idx],
BPF_EXIST);
CHECK(err < 0,
"reuseport array update same elem BPF_EXIST",
"sock_type:%d err:%d errno:%d\n", type, err, errno);
fds_idx = REUSEPORT_FD_IDX(err, fds_idx);
/* BPF_NOEXIST failure case */
err = bpf_map_update_elem(map_fd, &index3, &grpa_fds64[fds_idx],
BPF_NOEXIST);
CHECK(err >= 0 || errno != EEXIST,
"reuseport array update non-empty elem BPF_NOEXIST",
"sock_type:%d err:%d errno:%d\n",
type, err, errno);
fds_idx = REUSEPORT_FD_IDX(err, fds_idx);
/* BPF_ANY case (always succeed) */
err = bpf_map_update_elem(map_fd, &index3, &grpa_fds64[fds_idx],
BPF_ANY);
CHECK(err < 0,
"reuseport array update same sk with BPF_ANY",
"sock_type:%d err:%d errno:%d\n", type, err, errno);
fd64 = grpa_fds64[fds_idx];
sk_cookie = grpa_cookies[fds_idx];
/* The same sk cannot be added to reuseport_array twice */
err = bpf_map_update_elem(map_fd, &index3, &fd64, BPF_ANY);
CHECK(err >= 0 || errno != EBUSY,
"reuseport array update same sk with same index",
"sock_type:%d err:%d errno:%d\n",
type, err, errno);
err = bpf_map_update_elem(map_fd, &index0, &fd64, BPF_ANY);
CHECK(err >= 0 || errno != EBUSY,
"reuseport array update same sk with different index",
"sock_type:%d err:%d errno:%d\n",
type, err, errno);
/* Test delete elem */
err = bpf_map_delete_elem(map_fd, &index3);
CHECK(err < 0, "reuseport array delete sk",
"sock_type:%d err:%d errno:%d\n",
type, err, errno);
/* Add it back with BPF_NOEXIST */
err = bpf_map_update_elem(map_fd, &index3, &fd64, BPF_NOEXIST);
CHECK(err < 0,
"reuseport array re-add with BPF_NOEXIST after del",
"sock_type:%d err:%d errno:%d\n", type, err, errno);
/* Test cookie */
err = bpf_map_lookup_elem(map_fd, &index3, &map_cookie);
CHECK(err < 0 || sk_cookie != map_cookie,
"reuseport array lookup re-added sk",
"sock_type:%d err:%d errno:%d sk_cookie:0x%llx map_cookie:0x%llxn",
type, err, errno, sk_cookie, map_cookie);
/* Test elem removed by close() */
for (f = 0; f < ARRAY_SIZE(grpa_fds64); f++)
close(grpa_fds64[f]);
err = bpf_map_lookup_elem(map_fd, &index3, &map_cookie);
CHECK(err >= 0 || errno != ENOENT,
"reuseport array lookup after close()",
"sock_type:%d err:%d errno:%d\n",
type, err, errno);
}
/* Test SOCK_RAW */
fd64 = socket(AF_INET6, SOCK_RAW, IPPROTO_UDP);
CHECK(fd64 == -1, "socket(SOCK_RAW)", "err:%d errno:%d\n",
err, errno);
err = bpf_map_update_elem(map_fd, &index3, &fd64, BPF_NOEXIST);
CHECK(err >= 0 || errno != ENOTSUPP, "reuseport array update SOCK_RAW",
"err:%d errno:%d\n", err, errno);
close(fd64);
/* Close the 64 bit value map */
close(map_fd);
/* Test 32 bit fd */
map_fd = bpf_map_create(BPF_MAP_TYPE_REUSEPORT_SOCKARRAY, NULL,
sizeof(__u32), sizeof(__u32), array_size, NULL);
CHECK(map_fd < 0, "reuseport array create",
"map_fd:%d, errno:%d\n", map_fd, errno);
prepare_reuseport_grp(SOCK_STREAM, map_fd, sizeof(__u32), &fd64,
&sk_cookie, 1);
fd = fd64;
err = bpf_map_update_elem(map_fd, &index3, &fd, BPF_NOEXIST);
CHECK(err < 0, "reuseport array update 32 bit fd",
"err:%d errno:%d\n", err, errno);
err = bpf_map_lookup_elem(map_fd, &index3, &map_cookie);
CHECK(err >= 0 || errno != ENOSPC,
"reuseport array lookup 32 bit fd",
"err:%d errno:%d\n", err, errno);
close(fd);
close(map_fd);
}
static void run_all_tests(void)
{
test_hashmap(0, NULL);
test_hashmap_percpu(0, NULL);
test_hashmap_walk(0, NULL);
test_hashmap_zero_seed();
test_arraymap(0, NULL);
test_arraymap_percpu(0, NULL);
test_arraymap_percpu_many_keys();
test_devmap(0, NULL);
test_devmap_hash(0, NULL);
test_sockmap(0, NULL);
test_map_large();
test_map_parallel();
test_map_stress();
test_map_rdonly();
test_map_wronly();
test_reuseport_array();
test_queuemap(0, NULL);
test_stackmap(0, NULL);
test_map_in_map();
}
#define DEFINE_TEST(name) extern void test_##name(void);
#include <map_tests/tests.h>
#undef DEFINE_TEST
int main(void)
{
srand(time(NULL));
libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
map_opts.map_flags = 0;
run_all_tests();
map_opts.map_flags = BPF_F_NO_PREALLOC;
run_all_tests();
#define DEFINE_TEST(name) test_##name();
#include <map_tests/tests.h>
#undef DEFINE_TEST
printf("test_maps: OK, %d SKIPPED\n", skips);
return 0;
}