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56dda5a48f
Adding the test to re-attach (detach/attach again) tracing fentry programs, plus check that already linked program can't be attached again. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andrii@kernel.org> Link: https://lore.kernel.org/bpf/20210414195147.1624932-4-jolsa@kernel.org
59 lines
1.5 KiB
C
59 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2019 Facebook */
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#include <test_progs.h>
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#include "fentry_test.skel.h"
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static int fentry_test(struct fentry_test *fentry_skel)
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{
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int err, prog_fd, i;
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__u32 duration = 0, retval;
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struct bpf_link *link;
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__u64 *result;
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err = fentry_test__attach(fentry_skel);
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if (!ASSERT_OK(err, "fentry_attach"))
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return err;
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/* Check that already linked program can't be attached again. */
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link = bpf_program__attach(fentry_skel->progs.test1);
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if (!ASSERT_ERR_PTR(link, "fentry_attach_link"))
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return -1;
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prog_fd = bpf_program__fd(fentry_skel->progs.test1);
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err = bpf_prog_test_run(prog_fd, 1, NULL, 0,
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NULL, NULL, &retval, &duration);
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ASSERT_OK(err, "test_run");
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ASSERT_EQ(retval, 0, "test_run");
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result = (__u64 *)fentry_skel->bss;
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for (i = 0; i < sizeof(*fentry_skel->bss) / sizeof(__u64); i++) {
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if (!ASSERT_EQ(result[i], 1, "fentry_result"))
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return -1;
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}
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fentry_test__detach(fentry_skel);
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/* zero results for re-attach test */
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memset(fentry_skel->bss, 0, sizeof(*fentry_skel->bss));
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return 0;
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}
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void test_fentry_test(void)
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{
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struct fentry_test *fentry_skel = NULL;
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int err;
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fentry_skel = fentry_test__open_and_load();
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if (!ASSERT_OK_PTR(fentry_skel, "fentry_skel_load"))
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goto cleanup;
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err = fentry_test(fentry_skel);
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if (!ASSERT_OK(err, "fentry_first_attach"))
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goto cleanup;
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err = fentry_test(fentry_skel);
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ASSERT_OK(err, "fentry_second_attach");
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cleanup:
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fentry_test__destroy(fentry_skel);
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}
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