blob: b577666d028e13cd4a1113e63e7b53b09d55a755 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2018 Facebook */
#include <stdlib.h>
#include <unistd.h>
#include <stdbool.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <fcntl.h>
#include <linux/bpf.h>
#include <linux/err.h>
#include <linux/types.h>
#include <linux/if_ether.h>
#include <sys/types.h>
#include <sys/epoll.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <bpf/bpf.h>
#include <bpf/libbpf.h>
#include "bpf_rlimit.h"
#include "bpf_util.h"
#include "test_progs.h"
#include "test_select_reuseport_common.h"
#define MAX_TEST_NAME 80
#define MIN_TCPHDR_LEN 20
#define UDPHDR_LEN 8
#define TCP_SYNCOOKIE_SYSCTL "/proc/sys/net/ipv4/tcp_syncookies"
#define TCP_FO_SYSCTL "/proc/sys/net/ipv4/tcp_fastopen"
#define REUSEPORT_ARRAY_SIZE 32
static int result_map, tmp_index_ovr_map, linum_map, data_check_map;
static __u32 expected_results[NR_RESULTS];
static int sk_fds[REUSEPORT_ARRAY_SIZE];
static int reuseport_array = -1, outer_map = -1;
static int select_by_skb_data_prog;
static int saved_tcp_syncookie = -1;
static struct bpf_object *obj;
static int saved_tcp_fo = -1;
static __u32 index_zero;
static int epfd;
static union sa46 {
struct sockaddr_in6 v6;
struct sockaddr_in v4;
sa_family_t family;
} srv_sa;
#define RET_IF(condition, tag, format...) ({ \
if (CHECK_FAIL(condition)) { \
printf(tag " " format); \
return; \
} \
})
#define RET_ERR(condition, tag, format...) ({ \
if (CHECK_FAIL(condition)) { \
printf(tag " " format); \
return -1; \
} \
})
static int create_maps(void)
{
struct bpf_create_map_attr attr = {};
/* Creating reuseport_array */
attr.name = "reuseport_array";
attr.map_type = BPF_MAP_TYPE_REUSEPORT_SOCKARRAY;
attr.key_size = sizeof(__u32);
attr.value_size = sizeof(__u32);
attr.max_entries = REUSEPORT_ARRAY_SIZE;
reuseport_array = bpf_create_map_xattr(&attr);
RET_ERR(reuseport_array == -1, "creating reuseport_array",
"reuseport_array:%d errno:%d\n", reuseport_array, errno);
/* Creating outer_map */
attr.name = "outer_map";
attr.map_type = BPF_MAP_TYPE_ARRAY_OF_MAPS;
attr.key_size = sizeof(__u32);
attr.value_size = sizeof(__u32);
attr.max_entries = 1;
attr.inner_map_fd = reuseport_array;
outer_map = bpf_create_map_xattr(&attr);
RET_ERR(outer_map == -1, "creating outer_map",
"outer_map:%d errno:%d\n", outer_map, errno);
return 0;
}
static int prepare_bpf_obj(void)
{
struct bpf_program *prog;
struct bpf_map *map;
int err;
obj = bpf_object__open("test_select_reuseport_kern.o");
RET_ERR(IS_ERR_OR_NULL(obj), "open test_select_reuseport_kern.o",
"obj:%p PTR_ERR(obj):%ld\n", obj, PTR_ERR(obj));
map = bpf_object__find_map_by_name(obj, "outer_map");
RET_ERR(!map, "find outer_map", "!map\n");
err = bpf_map__reuse_fd(map, outer_map);
RET_ERR(err, "reuse outer_map", "err:%d\n", err);
err = bpf_object__load(obj);
RET_ERR(err, "load bpf_object", "err:%d\n", err);
prog = bpf_program__next(NULL, obj);
RET_ERR(!prog, "get first bpf_program", "!prog\n");
select_by_skb_data_prog = bpf_program__fd(prog);
RET_ERR(select_by_skb_data_prog == -1, "get prog fd",
"select_by_skb_data_prog:%d\n", select_by_skb_data_prog);
map = bpf_object__find_map_by_name(obj, "result_map");
RET_ERR(!map, "find result_map", "!map\n");
result_map = bpf_map__fd(map);
RET_ERR(result_map == -1, "get result_map fd",
"result_map:%d\n", result_map);
map = bpf_object__find_map_by_name(obj, "tmp_index_ovr_map");
RET_ERR(!map, "find tmp_index_ovr_map\n", "!map");
tmp_index_ovr_map = bpf_map__fd(map);
RET_ERR(tmp_index_ovr_map == -1, "get tmp_index_ovr_map fd",
"tmp_index_ovr_map:%d\n", tmp_index_ovr_map);
map = bpf_object__find_map_by_name(obj, "linum_map");
RET_ERR(!map, "find linum_map", "!map\n");
linum_map = bpf_map__fd(map);
RET_ERR(linum_map == -1, "get linum_map fd",
"linum_map:%d\n", linum_map);
map = bpf_object__find_map_by_name(obj, "data_check_map");
RET_ERR(!map, "find data_check_map", "!map\n");
data_check_map = bpf_map__fd(map);
RET_ERR(data_check_map == -1, "get data_check_map fd",
"data_check_map:%d\n", data_check_map);
return 0;
}
static void sa46_init_loopback(union sa46 *sa, sa_family_t family)
{
memset(sa, 0, sizeof(*sa));
sa->family = family;
if (sa->family == AF_INET6)
sa->v6.sin6_addr = in6addr_loopback;
else
sa->v4.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
}
static void sa46_init_inany(union sa46 *sa, sa_family_t family)
{
memset(sa, 0, sizeof(*sa));
sa->family = family;
if (sa->family == AF_INET6)
sa->v6.sin6_addr = in6addr_any;
else
sa->v4.sin_addr.s_addr = INADDR_ANY;
}
static int read_int_sysctl(const char *sysctl)
{
char buf[16];
int fd, ret;
fd = open(sysctl, 0);
RET_ERR(fd == -1, "open(sysctl)",
"sysctl:%s fd:%d errno:%d\n", sysctl, fd, errno);
ret = read(fd, buf, sizeof(buf));
RET_ERR(ret <= 0, "read(sysctl)",
"sysctl:%s ret:%d errno:%d\n", sysctl, ret, errno);
close(fd);
return atoi(buf);
}
static int write_int_sysctl(const char *sysctl, int v)
{
int fd, ret, size;
char buf[16];
fd = open(sysctl, O_RDWR);
RET_ERR(fd == -1, "open(sysctl)",
"sysctl:%s fd:%d errno:%d\n", sysctl, fd, errno);
size = snprintf(buf, sizeof(buf), "%d", v);
ret = write(fd, buf, size);
RET_ERR(ret != size, "write(sysctl)",
"sysctl:%s ret:%d size:%d errno:%d\n",
sysctl, ret, size, errno);
close(fd);
return 0;
}
static void restore_sysctls(void)
{
if (saved_tcp_fo != -1)
write_int_sysctl(TCP_FO_SYSCTL, saved_tcp_fo);
if (saved_tcp_syncookie != -1)
write_int_sysctl(TCP_SYNCOOKIE_SYSCTL, saved_tcp_syncookie);
}
static int enable_fastopen(void)
{
int fo;
fo = read_int_sysctl(TCP_FO_SYSCTL);
if (fo < 0)
return -1;
return write_int_sysctl(TCP_FO_SYSCTL, fo | 7);
}
static int enable_syncookie(void)
{
return write_int_sysctl(TCP_SYNCOOKIE_SYSCTL, 2);
}
static int disable_syncookie(void)
{
return write_int_sysctl(TCP_SYNCOOKIE_SYSCTL, 0);
}
static long get_linum(void)
{
__u32 linum;
int err;
err = bpf_map_lookup_elem(linum_map, &index_zero, &linum);
RET_ERR(err == -1, "lookup_elem(linum_map)", "err:%d errno:%d\n",
err, errno);
return linum;
}
static void check_data(int type, sa_family_t family, const struct cmd *cmd,
int cli_fd)
{
struct data_check expected = {}, result;
union sa46 cli_sa;
socklen_t addrlen;
int err;
addrlen = sizeof(cli_sa);
err = getsockname(cli_fd, (struct sockaddr *)&cli_sa,
&addrlen);
RET_IF(err == -1, "getsockname(cli_fd)", "err:%d errno:%d\n",
err, errno);
err = bpf_map_lookup_elem(data_check_map, &index_zero, &result);
RET_IF(err == -1, "lookup_elem(data_check_map)", "err:%d errno:%d\n",
err, errno);
if (type == SOCK_STREAM) {
expected.len = MIN_TCPHDR_LEN;
expected.ip_protocol = IPPROTO_TCP;
} else {
expected.len = UDPHDR_LEN;
expected.ip_protocol = IPPROTO_UDP;
}
if (family == AF_INET6) {
expected.eth_protocol = htons(ETH_P_IPV6);
expected.bind_inany = !srv_sa.v6.sin6_addr.s6_addr32[3] &&
!srv_sa.v6.sin6_addr.s6_addr32[2] &&
!srv_sa.v6.sin6_addr.s6_addr32[1] &&
!srv_sa.v6.sin6_addr.s6_addr32[0];
memcpy(&expected.skb_addrs[0], cli_sa.v6.sin6_addr.s6_addr32,
sizeof(cli_sa.v6.sin6_addr));
memcpy(&expected.skb_addrs[4], &in6addr_loopback,
sizeof(in6addr_loopback));
expected.skb_ports[0] = cli_sa.v6.sin6_port;
expected.skb_ports[1] = srv_sa.v6.sin6_port;
} else {
expected.eth_protocol = htons(ETH_P_IP);
expected.bind_inany = !srv_sa.v4.sin_addr.s_addr;
expected.skb_addrs[0] = cli_sa.v4.sin_addr.s_addr;
expected.skb_addrs[1] = htonl(INADDR_LOOPBACK);
expected.skb_ports[0] = cli_sa.v4.sin_port;
expected.skb_ports[1] = srv_sa.v4.sin_port;
}
if (memcmp(&result, &expected, offsetof(struct data_check,
equal_check_end))) {
printf("unexpected data_check\n");
printf(" result: (0x%x, %u, %u)\n",
result.eth_protocol, result.ip_protocol,
result.bind_inany);
printf("expected: (0x%x, %u, %u)\n",
expected.eth_protocol, expected.ip_protocol,
expected.bind_inany);
RET_IF(1, "data_check result != expected",
"bpf_prog_linum:%ld\n", get_linum());
}
RET_IF(!result.hash, "data_check result.hash empty",
"result.hash:%u", result.hash);
expected.len += cmd ? sizeof(*cmd) : 0;
if (type == SOCK_STREAM)
RET_IF(expected.len > result.len, "expected.len > result.len",
"expected.len:%u result.len:%u bpf_prog_linum:%ld\n",
expected.len, result.len, get_linum());
else
RET_IF(expected.len != result.len, "expected.len != result.len",
"expected.len:%u result.len:%u bpf_prog_linum:%ld\n",
expected.len, result.len, get_linum());
}
static const char *result_to_str(enum result res)
{
switch (res) {
case DROP_ERR_INNER_MAP:
return "DROP_ERR_INNER_MAP";
case DROP_ERR_SKB_DATA:
return "DROP_ERR_SKB_DATA";
case DROP_ERR_SK_SELECT_REUSEPORT:
return "DROP_ERR_SK_SELECT_REUSEPORT";
case DROP_MISC:
return "DROP_MISC";
case PASS:
return "PASS";
case PASS_ERR_SK_SELECT_REUSEPORT:
return "PASS_ERR_SK_SELECT_REUSEPORT";
default:
return "UNKNOWN";
}
}
static void check_results(void)
{
__u32 results[NR_RESULTS];
__u32 i, broken = 0;
int err;
for (i = 0; i < NR_RESULTS; i++) {
err = bpf_map_lookup_elem(result_map, &i, &results[i]);
RET_IF(err == -1, "lookup_elem(result_map)",
"i:%u err:%d errno:%d\n", i, err, errno);
}
for (i = 0; i < NR_RESULTS; i++) {
if (results[i] != expected_results[i]) {
broken = i;
break;
}
}
if (i == NR_RESULTS)
return;
printf("unexpected result\n");
printf(" result: [");
printf("%u", results[0]);
for (i = 1; i < NR_RESULTS; i++)
printf(", %u", results[i]);
printf("]\n");
printf("expected: [");
printf("%u", expected_results[0]);
for (i = 1; i < NR_RESULTS; i++)
printf(", %u", expected_results[i]);
printf("]\n");
printf("mismatch on %s (bpf_prog_linum:%ld)\n", result_to_str(broken),
get_linum());
CHECK_FAIL(true);
}
static int send_data(int type, sa_family_t family, void *data, size_t len,
enum result expected)
{
union sa46 cli_sa;
int fd, err;
fd = socket(family, type, 0);
RET_ERR(fd == -1, "socket()", "fd:%d errno:%d\n", fd, errno);
sa46_init_loopback(&cli_sa, family);
err = bind(fd, (struct sockaddr *)&cli_sa, sizeof(cli_sa));
RET_ERR(fd == -1, "bind(cli_sa)", "err:%d errno:%d\n", err, errno);
err = sendto(fd, data, len, MSG_FASTOPEN, (struct sockaddr *)&srv_sa,
sizeof(srv_sa));
RET_ERR(err != len && expected >= PASS,
"sendto()", "family:%u err:%d errno:%d expected:%d\n",
family, err, errno, expected);
return fd;
}
static void do_test(int type, sa_family_t family, struct cmd *cmd,
enum result expected)
{
int nev, srv_fd, cli_fd;
struct epoll_event ev;
struct cmd rcv_cmd;
ssize_t nread;
cli_fd = send_data(type, family, cmd, cmd ? sizeof(*cmd) : 0,
expected);
if (cli_fd < 0)
return;
nev = epoll_wait(epfd, &ev, 1, expected >= PASS ? 5 : 0);
RET_IF((nev <= 0 && expected >= PASS) ||
(nev > 0 && expected < PASS),
"nev <> expected",
"nev:%d expected:%d type:%d family:%d data:(%d, %d)\n",
nev, expected, type, family,
cmd ? cmd->reuseport_index : -1,
cmd ? cmd->pass_on_failure : -1);
check_results();
check_data(type, family, cmd, cli_fd);
if (expected < PASS)
return;
RET_IF(expected != PASS_ERR_SK_SELECT_REUSEPORT &&
cmd->reuseport_index != ev.data.u32,
"check cmd->reuseport_index",
"cmd:(%u, %u) ev.data.u32:%u\n",
cmd->pass_on_failure, cmd->reuseport_index, ev.data.u32);
srv_fd = sk_fds[ev.data.u32];
if (type == SOCK_STREAM) {
int new_fd = accept(srv_fd, NULL, 0);
RET_IF(new_fd == -1, "accept(srv_fd)",
"ev.data.u32:%u new_fd:%d errno:%d\n",
ev.data.u32, new_fd, errno);
nread = recv(new_fd, &rcv_cmd, sizeof(rcv_cmd), MSG_DONTWAIT);
RET_IF(nread != sizeof(rcv_cmd),
"recv(new_fd)",
"ev.data.u32:%u nread:%zd sizeof(rcv_cmd):%zu errno:%d\n",
ev.data.u32, nread, sizeof(rcv_cmd), errno);
close(new_fd);
} else {
nread = recv(srv_fd, &rcv_cmd, sizeof(rcv_cmd), MSG_DONTWAIT);
RET_IF(nread != sizeof(rcv_cmd),
"recv(sk_fds)",
"ev.data.u32:%u nread:%zd sizeof(rcv_cmd):%zu errno:%d\n",
ev.data.u32, nread, sizeof(rcv_cmd), errno);
}
close(cli_fd);
}
static void test_err_inner_map(int type, sa_family_t family)
{
struct cmd cmd = {
.reuseport_index = 0,
.pass_on_failure = 0,
};
expected_results[DROP_ERR_INNER_MAP]++;
do_test(type, family, &cmd, DROP_ERR_INNER_MAP);
}
static void test_err_skb_data(int type, sa_family_t family)
{
expected_results[DROP_ERR_SKB_DATA]++;
do_test(type, family, NULL, DROP_ERR_SKB_DATA);
}
static void test_err_sk_select_port(int type, sa_family_t family)
{
struct cmd cmd = {
.reuseport_index = REUSEPORT_ARRAY_SIZE,
.pass_on_failure = 0,
};
expected_results[DROP_ERR_SK_SELECT_REUSEPORT]++;
do_test(type, family, &cmd, DROP_ERR_SK_SELECT_REUSEPORT);
}
static void test_pass(int type, sa_family_t family)
{
struct cmd cmd;
int i;
cmd.pass_on_failure = 0;
for (i = 0; i < REUSEPORT_ARRAY_SIZE; i++) {
expected_results[PASS]++;
cmd.reuseport_index = i;
do_test(type, family, &cmd, PASS);
}
}
static void test_syncookie(int type, sa_family_t family)
{
int err, tmp_index = 1;
struct cmd cmd = {
.reuseport_index = 0,
.pass_on_failure = 0,
};
if (type != SOCK_STREAM)
return;
/*
* +1 for TCP-SYN and
* +1 for the TCP-ACK (ack the syncookie)
*/
expected_results[PASS] += 2;
enable_syncookie();
/*
* Simulate TCP-SYN and TCP-ACK are handled by two different sk:
* TCP-SYN: select sk_fds[tmp_index = 1] tmp_index is from the
* tmp_index_ovr_map
* TCP-ACK: select sk_fds[reuseport_index = 0] reuseport_index
* is from the cmd.reuseport_index
*/
err = bpf_map_update_elem(tmp_index_ovr_map, &index_zero,
&tmp_index, BPF_ANY);
RET_IF(err == -1, "update_elem(tmp_index_ovr_map, 0, 1)",
"err:%d errno:%d\n", err, errno);
do_test(type, family, &cmd, PASS);
err = bpf_map_lookup_elem(tmp_index_ovr_map, &index_zero,
&tmp_index);
RET_IF(err == -1 || tmp_index != -1,
"lookup_elem(tmp_index_ovr_map)",
"err:%d errno:%d tmp_index:%d\n",
err, errno, tmp_index);
disable_syncookie();
}
static void test_pass_on_err(int type, sa_family_t family)
{
struct cmd cmd = {
.reuseport_index = REUSEPORT_ARRAY_SIZE,
.pass_on_failure = 1,
};
expected_results[PASS_ERR_SK_SELECT_REUSEPORT] += 1;
do_test(type, family, &cmd, PASS_ERR_SK_SELECT_REUSEPORT);
}
static void test_detach_bpf(int type, sa_family_t family)
{
#ifdef SO_DETACH_REUSEPORT_BPF
__u32 nr_run_before = 0, nr_run_after = 0, tmp, i;
struct epoll_event ev;
int cli_fd, err, nev;
struct cmd cmd = {};
int optvalue = 0;
err = setsockopt(sk_fds[0], SOL_SOCKET, SO_DETACH_REUSEPORT_BPF,
&optvalue, sizeof(optvalue));
RET_IF(err == -1, "setsockopt(SO_DETACH_REUSEPORT_BPF)",
"err:%d errno:%d\n", err, errno);
err = setsockopt(sk_fds[1], SOL_SOCKET, SO_DETACH_REUSEPORT_BPF,
&optvalue, sizeof(optvalue));
RET_IF(err == 0 || errno != ENOENT,
"setsockopt(SO_DETACH_REUSEPORT_BPF)",
"err:%d errno:%d\n", err, errno);
for (i = 0; i < NR_RESULTS; i++) {
err = bpf_map_lookup_elem(result_map, &i, &tmp);
RET_IF(err == -1, "lookup_elem(result_map)",
"i:%u err:%d errno:%d\n", i, err, errno);
nr_run_before += tmp;
}
cli_fd = send_data(type, family, &cmd, sizeof(cmd), PASS);
if (cli_fd < 0)
return;
nev = epoll_wait(epfd, &ev, 1, 5);
RET_IF(nev <= 0, "nev <= 0",
"nev:%d expected:1 type:%d family:%d data:(0, 0)\n",
nev, type, family);
for (i = 0; i < NR_RESULTS; i++) {
err = bpf_map_lookup_elem(result_map, &i, &tmp);
RET_IF(err == -1, "lookup_elem(result_map)",
"i:%u err:%d errno:%d\n", i, err, errno);
nr_run_after += tmp;
}
RET_IF(nr_run_before != nr_run_after,
"nr_run_before != nr_run_after",
"nr_run_before:%u nr_run_after:%u\n",
nr_run_before, nr_run_after);
close(cli_fd);
#else
test__skip();
#endif
}
static void prepare_sk_fds(int type, sa_family_t family, bool inany)
{
const int first = REUSEPORT_ARRAY_SIZE - 1;
int i, err, optval = 1;
struct epoll_event ev;
socklen_t addrlen;
if (inany)
sa46_init_inany(&srv_sa, family);
else
sa46_init_loopback(&srv_sa, family);
addrlen = sizeof(srv_sa);
/*
* The sk_fds[] is filled from the back such that the order
* is exactly opposite to the (struct sock_reuseport *)reuse->socks[].
*/
for (i = first; i >= 0; i--) {
sk_fds[i] = socket(family, type, 0);
RET_IF(sk_fds[i] == -1, "socket()", "sk_fds[%d]:%d errno:%d\n",
i, sk_fds[i], errno);
err = setsockopt(sk_fds[i], SOL_SOCKET, SO_REUSEPORT,
&optval, sizeof(optval));
RET_IF(err == -1, "setsockopt(SO_REUSEPORT)",
"sk_fds[%d] err:%d errno:%d\n",
i, err, errno);
if (i == first) {
err = setsockopt(sk_fds[i], SOL_SOCKET,
SO_ATTACH_REUSEPORT_EBPF,
&select_by_skb_data_prog,
sizeof(select_by_skb_data_prog));
RET_IF(err == -1, "setsockopt(SO_ATTACH_REUEPORT_EBPF)",
"err:%d errno:%d\n", err, errno);
}
err = bind(sk_fds[i], (struct sockaddr *)&srv_sa, addrlen);
RET_IF(err == -1, "bind()", "sk_fds[%d] err:%d errno:%d\n",
i, err, errno);
if (type == SOCK_STREAM) {
err = listen(sk_fds[i], 10);
RET_IF(err == -1, "listen()",
"sk_fds[%d] err:%d errno:%d\n",
i, err, errno);
}
err = bpf_map_update_elem(reuseport_array, &i, &sk_fds[i],
BPF_NOEXIST);
RET_IF(err == -1, "update_elem(reuseport_array)",
"sk_fds[%d] err:%d errno:%d\n", i, err, errno);
if (i == first) {
socklen_t addrlen = sizeof(srv_sa);
err = getsockname(sk_fds[i], (struct sockaddr *)&srv_sa,
&addrlen);
RET_IF(err == -1, "getsockname()",
"sk_fds[%d] err:%d errno:%d\n", i, err, errno);
}
}
epfd = epoll_create(1);
RET_IF(epfd == -1, "epoll_create(1)",
"epfd:%d errno:%d\n", epfd, errno);
ev.events = EPOLLIN;
for (i = 0; i < REUSEPORT_ARRAY_SIZE; i++) {
ev.data.u32 = i;
err = epoll_ctl(epfd, EPOLL_CTL_ADD, sk_fds[i], &ev);
RET_IF(err, "epoll_ctl(EPOLL_CTL_ADD)", "sk_fds[%d]\n", i);
}
}
static void setup_per_test(int type, sa_family_t family, bool inany,
bool no_inner_map)
{
int ovr = -1, err;
prepare_sk_fds(type, family, inany);
err = bpf_map_update_elem(tmp_index_ovr_map, &index_zero, &ovr,
BPF_ANY);
RET_IF(err == -1, "update_elem(tmp_index_ovr_map, 0, -1)",
"err:%d errno:%d\n", err, errno);
/* Install reuseport_array to outer_map? */
if (no_inner_map)
return;
err = bpf_map_update_elem(outer_map, &index_zero, &reuseport_array,
BPF_ANY);
RET_IF(err == -1, "update_elem(outer_map, 0, reuseport_array)",
"err:%d errno:%d\n", err, errno);
}
static void cleanup_per_test(bool no_inner_map)
{
int i, err, zero = 0;
memset(expected_results, 0, sizeof(expected_results));
for (i = 0; i < NR_RESULTS; i++) {
err = bpf_map_update_elem(result_map, &i, &zero, BPF_ANY);
RET_IF(err, "reset elem in result_map",
"i:%u err:%d errno:%d\n", i, err, errno);
}
err = bpf_map_update_elem(linum_map, &zero, &zero, BPF_ANY);
RET_IF(err, "reset line number in linum_map", "err:%d errno:%d\n",
err, errno);
for (i = 0; i < REUSEPORT_ARRAY_SIZE; i++)
close(sk_fds[i]);
close(epfd);
/* Delete reuseport_array from outer_map? */
if (no_inner_map)
return;
err = bpf_map_delete_elem(outer_map, &index_zero);
RET_IF(err == -1, "delete_elem(outer_map)",
"err:%d errno:%d\n", err, errno);
}
static void cleanup(void)
{
if (outer_map != -1)
close(outer_map);
if (reuseport_array != -1)
close(reuseport_array);
if (obj)
bpf_object__close(obj);
}
static const char *family_str(sa_family_t family)
{
switch (family) {
case AF_INET:
return "IPv4";
case AF_INET6:
return "IPv6";
default:
return "unknown";
}
}
static const char *sotype_str(int sotype)
{
switch (sotype) {
case SOCK_STREAM:
return "TCP";
case SOCK_DGRAM:
return "UDP";
default:
return "unknown";
}
}
#define TEST_INIT(fn, ...) { fn, #fn, __VA_ARGS__ }
static void test_config(int sotype, sa_family_t family, bool inany)
{
const struct test {
void (*fn)(int sotype, sa_family_t family);
const char *name;
bool no_inner_map;
} tests[] = {
TEST_INIT(test_err_inner_map, true /* no_inner_map */),
TEST_INIT(test_err_skb_data),
TEST_INIT(test_err_sk_select_port),
TEST_INIT(test_pass),
TEST_INIT(test_syncookie),
TEST_INIT(test_pass_on_err),
TEST_INIT(test_detach_bpf),
};
char s[MAX_TEST_NAME];
const struct test *t;
for (t = tests; t < tests + ARRAY_SIZE(tests); t++) {
snprintf(s, sizeof(s), "%s/%s %s %s",
family_str(family), sotype_str(sotype),
inany ? "INANY" : "LOOPBACK", t->name);
if (!test__start_subtest(s))
continue;
setup_per_test(sotype, family, inany, t->no_inner_map);
t->fn(sotype, family);
cleanup_per_test(t->no_inner_map);
}
}
#define BIND_INANY true
static void test_all(void)
{
const struct config {
int sotype;
sa_family_t family;
bool inany;
} configs[] = {
{ SOCK_STREAM, AF_INET },
{ SOCK_STREAM, AF_INET, BIND_INANY },
{ SOCK_STREAM, AF_INET6 },
{ SOCK_STREAM, AF_INET6, BIND_INANY },
{ SOCK_DGRAM, AF_INET },
{ SOCK_DGRAM, AF_INET6 },
};
const struct config *c;
for (c = configs; c < configs + ARRAY_SIZE(configs); c++)
test_config(c->sotype, c->family, c->inany);
}
void test_select_reuseport(void)
{
if (create_maps())
goto out;
if (prepare_bpf_obj())
goto out;
saved_tcp_fo = read_int_sysctl(TCP_FO_SYSCTL);
if (saved_tcp_fo < 0)
goto out;
saved_tcp_syncookie = read_int_sysctl(TCP_SYNCOOKIE_SYSCTL);
if (saved_tcp_syncookie < 0)
goto out;
if (enable_fastopen())
goto out;
if (disable_syncookie())
goto out;
test_all();
out:
cleanup();
restore_sysctls();
}