67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/* Copyright (c) 2019 Facebook */
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#include <test_progs.h>
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#include <linux/bpf.h>
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#include "test_pe_preserve_elems.skel.h"
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static int duration;
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static void test_one_map(struct bpf_map *map, struct bpf_program *prog,
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bool has_share_pe)
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{
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int err, key = 0, pfd = -1, mfd = bpf_map__fd(map);
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DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts);
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struct perf_event_attr attr = {
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.size = sizeof(struct perf_event_attr),
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.type = PERF_TYPE_SOFTWARE,
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.config = PERF_COUNT_SW_CPU_CLOCK,
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};
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pfd = syscall(__NR_perf_event_open, &attr, 0 /* pid */,
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-1 /* cpu 0 */, -1 /* group id */, 0 /* flags */);
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if (CHECK(pfd < 0, "perf_event_open", "failed\n"))
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return;
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err = bpf_map_update_elem(mfd, &key, &pfd, BPF_ANY);
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close(pfd);
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if (CHECK(err < 0, "bpf_map_update_elem", "failed\n"))
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return;
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err = bpf_prog_test_run_opts(bpf_program__fd(prog), &opts);
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if (CHECK(err < 0, "bpf_prog_test_run_opts", "failed\n"))
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return;
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if (CHECK(opts.retval != 0, "bpf_perf_event_read_value",
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"failed with %d\n", opts.retval))
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return;
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/* closing mfd, prog still holds a reference on map */
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close(mfd);
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err = bpf_prog_test_run_opts(bpf_program__fd(prog), &opts);
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if (CHECK(err < 0, "bpf_prog_test_run_opts", "failed\n"))
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return;
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if (has_share_pe) {
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CHECK(opts.retval != 0, "bpf_perf_event_read_value",
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"failed with %d\n", opts.retval);
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} else {
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CHECK(opts.retval != -ENOENT, "bpf_perf_event_read_value",
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"should have failed with %d, but got %d\n", -ENOENT,
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opts.retval);
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}
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}
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void test_pe_preserve_elems(void)
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{
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struct test_pe_preserve_elems *skel;
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skel = test_pe_preserve_elems__open_and_load();
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if (CHECK(!skel, "skel_open", "failed to open skeleton\n"))
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return;
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test_one_map(skel->maps.array_1, skel->progs.read_array_1, false);
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test_one_map(skel->maps.array_2, skel->progs.read_array_2, true);
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test_pe_preserve_elems__destroy(skel);
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}
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