static void test_pkt_access(void)
{
const char *file = "./test_pkt_access.o";
struct bpf_object *obj;
__u32 duration, retval;
int err, prog_fd;
err = bpf_prog_load(file, BPF_PROG_TYPE_SCHED_CLS, &obj, &prog_fd);
if (err) {
error_cnt++;
return;
}
err = bpf_prog_test_run(prog_fd, 100000, &pkt_v4, sizeof(pkt_v4),
NULL, NULL, &retval, &duration);
CHECK(err || errno || retval, "ipv4",
"err %d errno %d retval %d duration %d\n",
err, errno, retval, duration);
err = bpf_prog_test_run(prog_fd, 100000, &pkt_v6, sizeof(pkt_v6),
NULL, NULL, &retval, &duration);
CHECK(err || errno || retval, "ipv6",
"err %d errno %d retval %d duration %d\n",
err, errno, retval, duration);
bpf_object__close(obj);
}
void test_flow_dissector(void)
{
struct bpf_flow_keys flow_keys;
struct bpf_object *obj;
__u32 duration, retval;
int err, prog_fd;
__u32 size;
err = bpf_flow_load(&obj, "./bpf_flow.o", "flow_dissector",
"jmp_table", &prog_fd);
if (err) {
error_cnt++;
return;
}
err = bpf_prog_test_run(prog_fd, 10, &pkt_v4, sizeof(pkt_v4),
&flow_keys, &size, &retval, &duration);
CHECK(size != sizeof(flow_keys) || err || retval != 1, "ipv4",
"err %d errno %d retval %d duration %d size %u/%lu\n",
err, errno, retval, duration, size, sizeof(flow_keys));
CHECK_FLOW_KEYS("ipv4_flow_keys", flow_keys, pkt_v4_flow_keys);
err = bpf_prog_test_run(prog_fd, 10, &pkt_v6, sizeof(pkt_v6),
&flow_keys, &size, &retval, &duration);
CHECK(size != sizeof(flow_keys) || err || retval != 1, "ipv6",
"err %d errno %d retval %d duration %d size %u/%lu\n",
err, errno, retval, duration, size, sizeof(flow_keys));
CHECK_FLOW_KEYS("ipv6_flow_keys", flow_keys, pkt_v6_flow_keys);
bpf_object__close(obj);
}
static struct bpf_object *
__bpf_object__open(const char *path, void *obj_buf, size_t obj_buf_sz)
{
struct bpf_object *obj;
int err;
if (elf_version(EV_CURRENT) == EV_NONE) {
pr_warning("failed to init libelf for %s\n", path);
return ERR_PTR(-LIBBPF_ERRNO__LIBELF);
}
obj = bpf_object__new(path, obj_buf, obj_buf_sz);
if (IS_ERR(obj))
return obj;
CHECK_ERR(bpf_object__elf_init(obj), err, out);
CHECK_ERR(bpf_object__check_endianness(obj), err, out);
CHECK_ERR(bpf_object__elf_collect(obj), err, out);
CHECK_ERR(bpf_object__collect_reloc(obj), err, out);
CHECK_ERR(bpf_object__validate(obj), err, out);
bpf_object__elf_finish(obj);
return obj;
out:
bpf_object__close(obj);
return ERR_PTR(err);
}
void bpf__clear(void)
{
struct bpf_object *obj, *tmp;
bpf_object__for_each_safe(obj, tmp) {
bpf__unprobe(obj);
bpf_object__close(obj);
}
int main(int argc, char **argv)
{
struct bpf_prog_load_attr attr = {
.file = "test_sock_fields_kern.o",
.prog_type = BPF_PROG_TYPE_CGROUP_SKB,
.expected_attach_type = BPF_CGROUP_INET_EGRESS,
};
int cgroup_fd, prog_fd, err;
struct bpf_object *obj;
struct bpf_map *map;
err = setup_cgroup_environment();
CHECK(err, "setup_cgroup_environment()", "err:%d errno:%d",
err, errno);
atexit(cleanup_cgroup_environment);
/* Create a cgroup, get fd, and join it */
cgroup_fd = create_and_get_cgroup(TEST_CGROUP);
CHECK(cgroup_fd == -1, "create_and_get_cgroup()",
"cgroup_fd:%d errno:%d", cgroup_fd, errno);
err = join_cgroup(TEST_CGROUP);
CHECK(err, "join_cgroup", "err:%d errno:%d", err, errno);
err = bpf_prog_load_xattr(&attr, &obj, &prog_fd);
CHECK(err, "bpf_prog_load_xattr()", "err:%d", err);
err = bpf_prog_attach(prog_fd, cgroup_fd, BPF_CGROUP_INET_EGRESS, 0);
CHECK(err == -1, "bpf_prog_attach(CPF_CGROUP_INET_EGRESS)",
"err:%d errno%d", err, errno);
close(cgroup_fd);
map = bpf_object__find_map_by_name(obj, "addr_map");
CHECK(!map, "cannot find addr_map", "(null)");
addr_map_fd = bpf_map__fd(map);
map = bpf_object__find_map_by_name(obj, "sock_result_map");
CHECK(!map, "cannot find sock_result_map", "(null)");
sk_map_fd = bpf_map__fd(map);
map = bpf_object__find_map_by_name(obj, "tcp_sock_result_map");
CHECK(!map, "cannot find tcp_sock_result_map", "(null)");
tp_map_fd = bpf_map__fd(map);
map = bpf_object__find_map_by_name(obj, "linum_map");
CHECK(!map, "cannot find linum_map", "(null)");
linum_map_fd = bpf_map__fd(map);
test();
bpf_object__close(obj);
cleanup_cgroup_environment();
printf("PASS\n");
return 0;
}
static int test__bpf_parsing(void *obj_buf, size_t obj_buf_sz)
{
struct bpf_object *obj;
obj = bpf_object__open_buffer(obj_buf, obj_buf_sz, NULL);
if (IS_ERR(obj))
return TEST_FAIL;
bpf_object__close(obj);
return TEST_OK;
}
static void test_tcp_estats(void)
{
const char *file = "./test_tcp_estats.o";
int err, prog_fd;
struct bpf_object *obj;
__u32 duration = 0;
err = bpf_prog_load(file, BPF_PROG_TYPE_TRACEPOINT, &obj, &prog_fd);
CHECK(err, "", "err %d errno %d\n", err, errno);
if (err) {
error_cnt++;
return;
}
bpf_object__close(obj);
}
void test_xdp(void)
{
struct vip key4 = {.protocol = 6, .family = AF_INET};
struct vip key6 = {.protocol = 6, .family = AF_INET6};
struct iptnl_info value4 = {.family = AF_INET};
struct iptnl_info value6 = {.family = AF_INET6};
const char *file = "./test_xdp.o";
struct bpf_object *obj;
char buf[128];
struct ipv6hdr *iph6 = (void *)buf + sizeof(struct ethhdr);
struct iphdr *iph = (void *)buf + sizeof(struct ethhdr);
__u32 duration, retval, size;
int err, prog_fd, map_fd;
err = bpf_prog_load(file, BPF_PROG_TYPE_XDP, &obj, &prog_fd);
if (err) {
error_cnt++;
return;
}
map_fd = bpf_find_map(__func__, obj, "vip2tnl");
if (map_fd < 0)
goto out;
bpf_map_update_elem(map_fd, &key4, &value4, 0);
bpf_map_update_elem(map_fd, &key6, &value6, 0);
err = bpf_prog_test_run(prog_fd, 1, &pkt_v4, sizeof(pkt_v4),
buf, &size, &retval, &duration);
CHECK(err || retval != XDP_TX || size != 74 ||
iph->protocol != IPPROTO_IPIP, "ipv4",
"err %d errno %d retval %d size %d\n",
err, errno, retval, size);
err = bpf_prog_test_run(prog_fd, 1, &pkt_v6, sizeof(pkt_v6),
buf, &size, &retval, &duration);
CHECK(err || retval != XDP_TX || size != 114 ||
iph6->nexthdr != IPPROTO_IPV6, "ipv6",
"err %d errno %d retval %d size %d\n",
err, errno, retval, size);
out:
bpf_object__close(obj);
}
static void test_bpf_obj_id(void)
{
const __u64 array_magic_value = 0xfaceb00c;
const __u32 array_key = 0;
const int nr_iters = 2;
const char *file = "./test_obj_id.o";
const char *jit_sysctl = "/proc/sys/net/core/bpf_jit_enable";
const char *expected_prog_name = "test_obj_id";
const char *expected_map_name = "test_map_id";
const __u64 nsec_per_sec = 1000000000;
struct bpf_object *objs[nr_iters];
int prog_fds[nr_iters], map_fds[nr_iters];
/* +1 to test for the info_len returned by kernel */
struct bpf_prog_info prog_infos[nr_iters + 1];
struct bpf_map_info map_infos[nr_iters + 1];
/* Each prog only uses one map. +1 to test nr_map_ids
* returned by kernel.
*/
__u32 map_ids[nr_iters + 1];
char jited_insns[128], xlated_insns[128], zeros[128];
__u32 i, next_id, info_len, nr_id_found, duration = 0;
struct timespec real_time_ts, boot_time_ts;
int sysctl_fd, jit_enabled = 0, err = 0;
__u64 array_value;
uid_t my_uid = getuid();
time_t now, load_time;
sysctl_fd = open(jit_sysctl, 0, O_RDONLY);
if (sysctl_fd != -1) {
char tmpc;
if (read(sysctl_fd, &tmpc, sizeof(tmpc)) == 1)
jit_enabled = (tmpc != '0');
close(sysctl_fd);
}
err = bpf_prog_get_fd_by_id(0);
CHECK(err >= 0 || errno != ENOENT,
"get-fd-by-notexist-prog-id", "err %d errno %d\n", err, errno);
err = bpf_map_get_fd_by_id(0);
CHECK(err >= 0 || errno != ENOENT,
"get-fd-by-notexist-map-id", "err %d errno %d\n", err, errno);
for (i = 0; i < nr_iters; i++)
objs[i] = NULL;
/* Check bpf_obj_get_info_by_fd() */
bzero(zeros, sizeof(zeros));
for (i = 0; i < nr_iters; i++) {
now = time(NULL);
err = bpf_prog_load(file, BPF_PROG_TYPE_SOCKET_FILTER,
&objs[i], &prog_fds[i]);
/* test_obj_id.o is a dumb prog. It should never fail
* to load.
*/
if (err)
error_cnt++;
assert(!err);
/* Insert a magic value to the map */
map_fds[i] = bpf_find_map(__func__, objs[i], "test_map_id");
assert(map_fds[i] >= 0);
err = bpf_map_update_elem(map_fds[i], &array_key,
&array_magic_value, 0);
assert(!err);
/* Check getting map info */
info_len = sizeof(struct bpf_map_info) * 2;
bzero(&map_infos[i], info_len);
err = bpf_obj_get_info_by_fd(map_fds[i], &map_infos[i],
&info_len);
if (CHECK(err ||
map_infos[i].type != BPF_MAP_TYPE_ARRAY ||
map_infos[i].key_size != sizeof(__u32) ||
map_infos[i].value_size != sizeof(__u64) ||
map_infos[i].max_entries != 1 ||
map_infos[i].map_flags != 0 ||
info_len != sizeof(struct bpf_map_info) ||
strcmp((char *)map_infos[i].name, expected_map_name),
"get-map-info(fd)",
"err %d errno %d type %d(%d) info_len %u(%lu) key_size %u value_size %u max_entries %u map_flags %X name %s(%s)\n",
err, errno,
map_infos[i].type, BPF_MAP_TYPE_ARRAY,
info_len, sizeof(struct bpf_map_info),
map_infos[i].key_size,
map_infos[i].value_size,
map_infos[i].max_entries,
map_infos[i].map_flags,
map_infos[i].name, expected_map_name))
goto done;
/* Check getting prog info */
info_len = sizeof(struct bpf_prog_info) * 2;
bzero(&prog_infos[i], info_len);
bzero(jited_insns, sizeof(jited_insns));
bzero(xlated_insns, sizeof(xlated_insns));
prog_infos[i].jited_prog_insns = ptr_to_u64(jited_insns);
prog_infos[i].jited_prog_len = sizeof(jited_insns);
prog_infos[i].xlated_prog_insns = ptr_to_u64(xlated_insns);
prog_infos[i].xlated_prog_len = sizeof(xlated_insns);
prog_infos[i].map_ids = ptr_to_u64(map_ids + i);
prog_infos[i].nr_map_ids = 2;
err = clock_gettime(CLOCK_REALTIME, &real_time_ts);
assert(!err);
err = clock_gettime(CLOCK_BOOTTIME, &boot_time_ts);
assert(!err);
err = bpf_obj_get_info_by_fd(prog_fds[i], &prog_infos[i],
&info_len);
load_time = (real_time_ts.tv_sec - boot_time_ts.tv_sec)
+ (prog_infos[i].load_time / nsec_per_sec);
if (CHECK(err ||
prog_infos[i].type != BPF_PROG_TYPE_SOCKET_FILTER ||
info_len != sizeof(struct bpf_prog_info) ||
(jit_enabled && !prog_infos[i].jited_prog_len) ||
(jit_enabled &&
!memcmp(jited_insns, zeros, sizeof(zeros))) ||
!prog_infos[i].xlated_prog_len ||
!memcmp(xlated_insns, zeros, sizeof(zeros)) ||
load_time < now - 60 || load_time > now + 60 ||
prog_infos[i].created_by_uid != my_uid ||
prog_infos[i].nr_map_ids != 1 ||
*(int *)prog_infos[i].map_ids != map_infos[i].id ||
strcmp((char *)prog_infos[i].name, expected_prog_name),
"get-prog-info(fd)",
"err %d errno %d i %d type %d(%d) info_len %u(%lu) jit_enabled %d jited_prog_len %u xlated_prog_len %u jited_prog %d xlated_prog %d load_time %lu(%lu) uid %u(%u) nr_map_ids %u(%u) map_id %u(%u) name %s(%s)\n",
err, errno, i,
prog_infos[i].type, BPF_PROG_TYPE_SOCKET_FILTER,
info_len, sizeof(struct bpf_prog_info),
jit_enabled,
prog_infos[i].jited_prog_len,
prog_infos[i].xlated_prog_len,
!!memcmp(jited_insns, zeros, sizeof(zeros)),
!!memcmp(xlated_insns, zeros, sizeof(zeros)),
load_time, now,
prog_infos[i].created_by_uid, my_uid,
prog_infos[i].nr_map_ids, 1,
*(int *)prog_infos[i].map_ids, map_infos[i].id,
prog_infos[i].name, expected_prog_name))
goto done;
}
/* Check bpf_prog_get_next_id() */
nr_id_found = 0;
next_id = 0;
while (!bpf_prog_get_next_id(next_id, &next_id)) {
struct bpf_prog_info prog_info = {};
__u32 saved_map_id;
int prog_fd;
info_len = sizeof(prog_info);
prog_fd = bpf_prog_get_fd_by_id(next_id);
if (prog_fd < 0 && errno == ENOENT)
/* The bpf_prog is in the dead row */
continue;
if (CHECK(prog_fd < 0, "get-prog-fd(next_id)",
"prog_fd %d next_id %d errno %d\n",
prog_fd, next_id, errno))
break;
for (i = 0; i < nr_iters; i++)
if (prog_infos[i].id == next_id)
break;
if (i == nr_iters)
continue;
nr_id_found++;
/* Negative test:
* prog_info.nr_map_ids = 1
* prog_info.map_ids = NULL
*/
prog_info.nr_map_ids = 1;
err = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &info_len);
if (CHECK(!err || errno != EFAULT,
"get-prog-fd-bad-nr-map-ids", "err %d errno %d(%d)",
err, errno, EFAULT))
break;
bzero(&prog_info, sizeof(prog_info));
info_len = sizeof(prog_info);
saved_map_id = *(int *)(prog_infos[i].map_ids);
prog_info.map_ids = prog_infos[i].map_ids;
prog_info.nr_map_ids = 2;
err = bpf_obj_get_info_by_fd(prog_fd, &prog_info, &info_len);
prog_infos[i].jited_prog_insns = 0;
prog_infos[i].xlated_prog_insns = 0;
CHECK(err || info_len != sizeof(struct bpf_prog_info) ||
memcmp(&prog_info, &prog_infos[i], info_len) ||
*(int *)prog_info.map_ids != saved_map_id,
"get-prog-info(next_id->fd)",
"err %d errno %d info_len %u(%lu) memcmp %d map_id %u(%u)\n",
err, errno, info_len, sizeof(struct bpf_prog_info),
memcmp(&prog_info, &prog_infos[i], info_len),
*(int *)prog_info.map_ids, saved_map_id);
close(prog_fd);
}
CHECK(nr_id_found != nr_iters,
"check total prog id found by get_next_id",
"nr_id_found %u(%u)\n",
nr_id_found, nr_iters);
/* Check bpf_map_get_next_id() */
nr_id_found = 0;
next_id = 0;
while (!bpf_map_get_next_id(next_id, &next_id)) {
struct bpf_map_info map_info = {};
int map_fd;
info_len = sizeof(map_info);
map_fd = bpf_map_get_fd_by_id(next_id);
if (map_fd < 0 && errno == ENOENT)
/* The bpf_map is in the dead row */
continue;
if (CHECK(map_fd < 0, "get-map-fd(next_id)",
"map_fd %d next_id %u errno %d\n",
map_fd, next_id, errno))
break;
for (i = 0; i < nr_iters; i++)
if (map_infos[i].id == next_id)
break;
if (i == nr_iters)
continue;
nr_id_found++;
err = bpf_map_lookup_elem(map_fd, &array_key, &array_value);
assert(!err);
err = bpf_obj_get_info_by_fd(map_fd, &map_info, &info_len);
CHECK(err || info_len != sizeof(struct bpf_map_info) ||
memcmp(&map_info, &map_infos[i], info_len) ||
array_value != array_magic_value,
"check get-map-info(next_id->fd)",
"err %d errno %d info_len %u(%lu) memcmp %d array_value %llu(%llu)\n",
err, errno, info_len, sizeof(struct bpf_map_info),
memcmp(&map_info, &map_infos[i], info_len),
array_value, array_magic_value);
close(map_fd);
}
CHECK(nr_id_found != nr_iters,
"check total map id found by get_next_id",
"nr_id_found %u(%u)\n",
nr_id_found, nr_iters);
done:
for (i = 0; i < nr_iters; i++)
bpf_object__close(objs[i]);
}
static void test_xdp(void)
{
struct vip key4 = {.protocol = 6, .family = AF_INET};
struct vip key6 = {.protocol = 6, .family = AF_INET6};
struct iptnl_info value4 = {.family = AF_INET};
struct iptnl_info value6 = {.family = AF_INET6};
const char *file = "./test_xdp.o";
struct bpf_object *obj;
char buf[128];
struct ipv6hdr *iph6 = (void *)buf + sizeof(struct ethhdr);
struct iphdr *iph = (void *)buf + sizeof(struct ethhdr);
__u32 duration, retval, size;
int err, prog_fd, map_fd;
err = bpf_prog_load(file, BPF_PROG_TYPE_XDP, &obj, &prog_fd);
if (err) {
error_cnt++;
return;
}
map_fd = bpf_find_map(__func__, obj, "vip2tnl");
if (map_fd < 0)
goto out;
bpf_map_update_elem(map_fd, &key4, &value4, 0);
bpf_map_update_elem(map_fd, &key6, &value6, 0);
err = bpf_prog_test_run(prog_fd, 1, &pkt_v4, sizeof(pkt_v4),
buf, &size, &retval, &duration);
CHECK(err || errno || retval != XDP_TX || size != 74 ||
iph->protocol != IPPROTO_IPIP, "ipv4",
"err %d errno %d retval %d size %d\n",
err, errno, retval, size);
err = bpf_prog_test_run(prog_fd, 1, &pkt_v6, sizeof(pkt_v6),
buf, &size, &retval, &duration);
CHECK(err || errno || retval != XDP_TX || size != 114 ||
iph6->nexthdr != IPPROTO_IPV6, "ipv6",
"err %d errno %d retval %d size %d\n",
err, errno, retval, size);
out:
bpf_object__close(obj);
}
#define MAGIC_VAL 0x1234
#define NUM_ITER 100000
#define VIP_NUM 5
static void test_l4lb(void)
{
unsigned int nr_cpus = bpf_num_possible_cpus();
const char *file = "./test_l4lb.o";
struct vip key = {.protocol = 6};
struct vip_meta {
__u32 flags;
__u32 vip_num;
} value = {.vip_num = VIP_NUM};
__u32 stats_key = VIP_NUM;
struct vip_stats {
__u64 bytes;
__u64 pkts;
} stats[nr_cpus];
struct real_definition {
union {
__be32 dst;
__be32 dstv6[4];
};
__u8 flags;
} real_def = {.dst = MAGIC_VAL};
__u32 ch_key = 11, real_num = 3;
__u32 duration, retval, size;
int err, i, prog_fd, map_fd;
__u64 bytes = 0, pkts = 0;
struct bpf_object *obj;
char buf[128];
u32 *magic = (u32 *)buf;
err = bpf_prog_load(file, BPF_PROG_TYPE_SCHED_CLS, &obj, &prog_fd);
if (err) {
error_cnt++;
return;
}
map_fd = bpf_find_map(__func__, obj, "vip_map");
if (map_fd < 0)
goto out;
bpf_map_update_elem(map_fd, &key, &value, 0);
map_fd = bpf_find_map(__func__, obj, "ch_rings");
if (map_fd < 0)
goto out;
bpf_map_update_elem(map_fd, &ch_key, &real_num, 0);
map_fd = bpf_find_map(__func__, obj, "reals");
if (map_fd < 0)
goto out;
bpf_map_update_elem(map_fd, &real_num, &real_def, 0);
err = bpf_prog_test_run(prog_fd, NUM_ITER, &pkt_v4, sizeof(pkt_v4),
buf, &size, &retval, &duration);
CHECK(err || errno || retval != 7/*TC_ACT_REDIRECT*/ || size != 54 ||
*magic != MAGIC_VAL, "ipv4",
"err %d errno %d retval %d size %d magic %x\n",
err, errno, retval, size, *magic);
err = bpf_prog_test_run(prog_fd, NUM_ITER, &pkt_v6, sizeof(pkt_v6),
buf, &size, &retval, &duration);
CHECK(err || errno || retval != 7/*TC_ACT_REDIRECT*/ || size != 74 ||
*magic != MAGIC_VAL, "ipv6",
"err %d errno %d retval %d size %d magic %x\n",
err, errno, retval, size, *magic);
map_fd = bpf_find_map(__func__, obj, "stats");
if (map_fd < 0)
goto out;
bpf_map_lookup_elem(map_fd, &stats_key, stats);
for (i = 0; i < nr_cpus; i++) {
bytes += stats[i].bytes;
pkts += stats[i].pkts;
}
if (bytes != MAGIC_BYTES * NUM_ITER * 2 || pkts != NUM_ITER * 2) {
error_cnt++;
printf("test_l4lb:FAIL:stats %lld %lld\n", bytes, pkts);
}
out:
bpf_object__close(obj);
}
