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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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bad2e478af
Turn ony libbpf 1.0 mode. Fix all the explicit IS_ERR checks that now will be broken because libbpf returns NULL on error (and sets errno). Fix ASSERT_OK_PTR and ASSERT_ERR_PTR to work for both old mode and new modes and use them throughout selftests. This is trivial to do by using libbpf_get_error() API that all libbpf users are supposed to use, instead of IS_ERR checks. A bunch of checks also did explicit -1 comparison for various fd-returning APIs. Such checks are replaced with >= 0 or < 0 cases. There were also few misuses of bpf_object__find_map_by_name() in test_maps. Those are fixed in this patch as well. Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: John Fastabend <john.fastabend@gmail.com> Acked-by: Toke Høiland-Jørgensen <toke@redhat.com> Link: https://lore.kernel.org/bpf/20210525035935.1461796-3-andrii@kernel.org
74 lines
2 KiB
C
74 lines
2 KiB
C
// 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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if (!ASSERT_OK_PTR(skel->links.sock, "cg_attach_sock"))
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goto close_skeleton;
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skel->links.sock_release = bpf_program__attach_cgroup(skel->progs.sock_release, cgroup_fd);
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if (!ASSERT_OK_PTR(skel->links.sock_release, "cg_attach_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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