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// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include "cgroup_helpers.h"
#include "network_helpers.h"
#include "sockopt_inherit.skel.h"
#define SOL_CUSTOM 0xdeadbeef
#define CUSTOM_INHERIT1 0
#define CUSTOM_INHERIT2 1
#define CUSTOM_LISTENER 2
static int verify_sockopt(int fd, int optname, const char *msg, char expected)
{
socklen_t optlen = 1;
char buf = 0;
int err;
err = getsockopt(fd, SOL_CUSTOM, optname, &buf, &optlen);
if (err) {
log_err("%s: failed to call getsockopt", msg);
return 1;
}
printf("%s %d: got=0x%x ? expected=0x%x\n", msg, optname, buf, expected);
if (buf != expected) {
log_err("%s: unexpected getsockopt value %d != %d", msg,
buf, expected);
return 1;
}
return 0;
}
static pthread_mutex_t server_started_mtx = PTHREAD_MUTEX_INITIALIZER;
static pthread_cond_t server_started = PTHREAD_COND_INITIALIZER;
static void *server_thread(void *arg)
{
struct sockaddr_storage addr;
socklen_t len = sizeof(addr);
int fd = *(int *)arg;
int client_fd;
int err = 0;
err = listen(fd, 1);
pthread_mutex_lock(&server_started_mtx);
pthread_cond_signal(&server_started);
pthread_mutex_unlock(&server_started_mtx);
if (!ASSERT_GE(err, 0, "listed on socket"))
return NULL;
err += verify_sockopt(fd, CUSTOM_INHERIT1, "listen", 1);
err += verify_sockopt(fd, CUSTOM_INHERIT2, "listen", 1);
err += verify_sockopt(fd, CUSTOM_LISTENER, "listen", 1);
client_fd = accept(fd, (struct sockaddr *)&addr, &len);
if (!ASSERT_GE(client_fd, 0, "accept client"))
return NULL;
err += verify_sockopt(client_fd, CUSTOM_INHERIT1, "accept", 1);
err += verify_sockopt(client_fd, CUSTOM_INHERIT2, "accept", 1);
err += verify_sockopt(client_fd, CUSTOM_LISTENER, "accept", 0);
close(client_fd);
return (void *)(long)err;
}
static int custom_cb(int fd, const struct post_socket_opts *opts)
{
char buf;
int err;
int i;
for (i = CUSTOM_INHERIT1; i <= CUSTOM_LISTENER; i++) {
buf = 0x01;
err = setsockopt(fd, SOL_CUSTOM, i, &buf, 1);
if (err) {
log_err("Failed to call setsockopt(%d)", i);
return -1;
}
}
return 0;
}
static void run_test(int cgroup_fd)
{
struct bpf_link *link_getsockopt = NULL;
struct bpf_link *link_setsockopt = NULL;
struct network_helper_opts opts = {
.post_socket_cb = custom_cb,
};
int server_fd = -1, client_fd;
struct sockaddr_in addr = {
.sin_family = AF_INET,
.sin_addr.s_addr = htonl(INADDR_LOOPBACK),
};
struct sockopt_inherit *obj;
void *server_err;
pthread_t tid;
int err;
obj = sockopt_inherit__open_and_load();
if (!ASSERT_OK_PTR(obj, "skel-load"))
return;
obj->bss->page_size = sysconf(_SC_PAGESIZE);
link_getsockopt = bpf_program__attach_cgroup(obj->progs._getsockopt,
cgroup_fd);
if (!ASSERT_OK_PTR(link_getsockopt, "cg-attach-getsockopt"))
goto close_bpf_object;
link_setsockopt = bpf_program__attach_cgroup(obj->progs._setsockopt,
cgroup_fd);
if (!ASSERT_OK_PTR(link_setsockopt, "cg-attach-setsockopt"))
goto close_bpf_object;
server_fd = start_server_addr(SOCK_STREAM, (struct sockaddr_storage *)&addr,
sizeof(addr), &opts);
if (!ASSERT_GE(server_fd, 0, "start_server"))
goto close_bpf_object;
pthread_mutex_lock(&server_started_mtx);
if (!ASSERT_OK(pthread_create(&tid, NULL, server_thread,
(void *)&server_fd), "pthread_create")) {
pthread_mutex_unlock(&server_started_mtx);
goto close_server_fd;
}
pthread_cond_wait(&server_started, &server_started_mtx);
pthread_mutex_unlock(&server_started_mtx);
client_fd = connect_to_fd(server_fd, 0);
if (!ASSERT_GE(client_fd, 0, "connect_to_server"))
goto close_server_fd;
ASSERT_OK(verify_sockopt(client_fd, CUSTOM_INHERIT1, "connect", 0), "verify_sockopt1");
ASSERT_OK(verify_sockopt(client_fd, CUSTOM_INHERIT2, "connect", 0), "verify_sockopt2");
ASSERT_OK(verify_sockopt(client_fd, CUSTOM_LISTENER, "connect", 0), "verify_sockopt ener");
pthread_join(tid, &server_err);
err = (int)(long)server_err;
ASSERT_OK(err, "pthread_join retval");
close(client_fd);
close_server_fd:
close(server_fd);
close_bpf_object:
bpf_link__destroy(link_getsockopt);
bpf_link__destroy(link_setsockopt);
sockopt_inherit__destroy(obj);
}
void test_sockopt_inherit(void)
{
int cgroup_fd;
cgroup_fd = test__join_cgroup("/sockopt_inherit");
if (!ASSERT_GE(cgroup_fd, 0, "join_cgroup"))
return;
run_test(cgroup_fd);
close(cgroup_fd);
}
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