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