71 lines · c
1// SPDX-License-Identifier: GPL-2.02#include <test_progs.h>3#include "udp_limit.skel.h"4 5#include <sys/types.h>6#include <sys/socket.h>7 8void test_udp_limit(void)9{10 struct udp_limit *skel;11 int fd1 = -1, fd2 = -1;12 int cgroup_fd;13 14 cgroup_fd = test__join_cgroup("/udp_limit");15 if (!ASSERT_GE(cgroup_fd, 0, "cg-join"))16 return;17 18 skel = udp_limit__open_and_load();19 if (!ASSERT_OK_PTR(skel, "skel-load"))20 goto close_cgroup_fd;21 22 skel->links.sock = bpf_program__attach_cgroup(skel->progs.sock, cgroup_fd);23 if (!ASSERT_OK_PTR(skel->links.sock, "cg_attach_sock"))24 goto close_skeleton;25 skel->links.sock_release = bpf_program__attach_cgroup(skel->progs.sock_release, cgroup_fd);26 if (!ASSERT_OK_PTR(skel->links.sock_release, "cg_attach_sock_release"))27 goto close_skeleton;28 29 /* BPF program enforces a single UDP socket per cgroup,30 * verify that.31 */32 fd1 = socket(AF_INET, SOCK_DGRAM, 0);33 if (!ASSERT_GE(fd1, 0, "socket(fd1)"))34 goto close_skeleton;35 36 fd2 = socket(AF_INET, SOCK_DGRAM, 0);37 if (!ASSERT_LT(fd2, 0, "socket(fd2)"))38 goto close_skeleton;39 40 /* We can reopen again after close. */41 close(fd1);42 fd1 = -1;43 44 fd1 = socket(AF_INET, SOCK_DGRAM, 0);45 if (!ASSERT_GE(fd1, 0, "socket(fd1-again)"))46 goto close_skeleton;47 48 /* Make sure the program was invoked the expected49 * number of times:50 * - open fd1 - BPF_CGROUP_INET_SOCK_CREATE51 * - attempt to openfd2 - BPF_CGROUP_INET_SOCK_CREATE52 * - close fd1 - BPF_CGROUP_INET_SOCK_RELEASE53 * - open fd1 again - BPF_CGROUP_INET_SOCK_CREATE54 */55 if (!ASSERT_EQ(skel->bss->invocations, 4, "bss-invocations"))56 goto close_skeleton;57 58 /* We should still have a single socket in use */59 if (!ASSERT_EQ(skel->bss->in_use, 1, "bss-in_use"))60 goto close_skeleton;61 62close_skeleton:63 if (fd1 >= 0)64 close(fd1);65 if (fd2 >= 0)66 close(fd2);67 udp_limit__destroy(skel);68close_cgroup_fd:69 close(cgroup_fd);70}71