0d7ae06860
Now that we support pinning a BPF timer to the current core, we should test it with some selftests. This patch adds two new testcases to the timer suite, which verifies that a BPF timer both with and without BPF_F_TIMER_ABS, can be pinned to the calling core with BPF_F_TIMER_CPU_PIN. Signed-off-by: David Vernet <void@manifault.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <song@kernel.org> Acked-by: Hou Tao <houtao1@huawei.com> Link: https://lore.kernel.org/bpf/20231004162339.200702-3-void@manifault.com
63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2021 Facebook */
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#include <test_progs.h>
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#include "timer.skel.h"
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static int timer(struct timer *timer_skel)
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{
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int err, prog_fd;
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LIBBPF_OPTS(bpf_test_run_opts, topts);
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err = timer__attach(timer_skel);
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if (!ASSERT_OK(err, "timer_attach"))
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return err;
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ASSERT_EQ(timer_skel->data->callback_check, 52, "callback_check1");
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ASSERT_EQ(timer_skel->data->callback2_check, 52, "callback2_check1");
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ASSERT_EQ(timer_skel->bss->pinned_callback_check, 0, "pinned_callback_check1");
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prog_fd = bpf_program__fd(timer_skel->progs.test1);
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err = bpf_prog_test_run_opts(prog_fd, &topts);
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ASSERT_OK(err, "test_run");
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ASSERT_EQ(topts.retval, 0, "test_run");
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timer__detach(timer_skel);
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usleep(50); /* 10 usecs should be enough, but give it extra */
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/* check that timer_cb1() was executed 10+10 times */
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ASSERT_EQ(timer_skel->data->callback_check, 42, "callback_check2");
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ASSERT_EQ(timer_skel->data->callback2_check, 42, "callback2_check2");
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/* check that timer_cb2() was executed twice */
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ASSERT_EQ(timer_skel->bss->bss_data, 10, "bss_data");
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/* check that timer_cb3() was executed twice */
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ASSERT_EQ(timer_skel->bss->abs_data, 12, "abs_data");
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/* check that timer_cb_pinned() was executed twice */
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ASSERT_EQ(timer_skel->bss->pinned_callback_check, 2, "pinned_callback_check");
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/* check that there were no errors in timer execution */
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ASSERT_EQ(timer_skel->bss->err, 0, "err");
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/* check that code paths completed */
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ASSERT_EQ(timer_skel->bss->ok, 1 | 2 | 4, "ok");
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return 0;
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}
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/* TODO: use pid filtering */
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void serial_test_timer(void)
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{
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struct timer *timer_skel = NULL;
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int err;
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timer_skel = timer__open_and_load();
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if (!ASSERT_OK_PTR(timer_skel, "timer_skel_load"))
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goto cleanup;
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err = timer(timer_skel);
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ASSERT_OK(err, "timer");
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cleanup:
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timer__destroy(timer_skel);
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}
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