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// SPDX-License-Identifier: GPL-2.0
#include <test_progs.h>
#include "udp_limit.skel.h"
#include <sys/types.h>
#include <sys/socket.h>
void test_udp_limit(void)
{
struct udp_limit *skel;
int fd1 = -1, fd2 = -1;
int cgroup_fd;
cgroup_fd = test__join_cgroup("/udp_limit");
if (!ASSERT_GE(cgroup_fd, 0, "cg-join"))
return;
skel = udp_limit__open_and_load();
if (!ASSERT_OK_PTR(skel, "skel-load"))
goto close_cgroup_fd;
skel->links.sock = bpf_program__attach_cgroup(skel->progs.sock, cgroup_fd);
if (!ASSERT_OK_PTR(skel->links.sock, "cg_attach_sock"))
goto close_skeleton;
skel->links.sock_release = bpf_program__attach_cgroup(skel->progs.sock_release, cgroup_fd);
if (!ASSERT_OK_PTR(skel->links.sock_release, "cg_attach_sock_release"))
goto close_skeleton;
/* BPF program enforces a single UDP socket per cgroup,
* verify that.
*/
fd1 = socket(AF_INET, SOCK_DGRAM, 0);
if (!ASSERT_GE(fd1, 0, "socket(fd1)"))
goto close_skeleton;
fd2 = socket(AF_INET, SOCK_DGRAM, 0);
if (!ASSERT_LT(fd2, 0, "socket(fd2)"))
goto close_skeleton;
/* We can reopen again after close. */
close(fd1);
fd1 = -1;
fd1 = socket(AF_INET, SOCK_DGRAM, 0);
if (!ASSERT_GE(fd1, 0, "socket(fd1-again)"))
goto close_skeleton;
/* Make sure the program was invoked the expected
* number of times:
* - open fd1 - BPF_CGROUP_INET_SOCK_CREATE
* - attempt to openfd2 - BPF_CGROUP_INET_SOCK_CREATE
* - close fd1 - BPF_CGROUP_INET_SOCK_RELEASE
* - open fd1 again - BPF_CGROUP_INET_SOCK_CREATE
*/
if (!ASSERT_EQ(skel->bss->invocations, 4, "bss-invocations"))
goto close_skeleton;
/* We should still have a single socket in use */
if (!ASSERT_EQ(skel->bss->in_use, 1, "bss-in_use"))
goto close_skeleton;
close_skeleton:
if (fd1 >= 0)
close(fd1);
if (fd2 >= 0)
close(fd2);
udp_limit__destroy(skel);
close_cgroup_fd:
close(cgroup_fd);
}
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