// SPDX-License-Identifier: GPL-2.0
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#define _GNU_SOURCE
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#include <test_progs.h>
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#include <sys/epoll.h>
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#include "test_ringbuf_multi.skel.h"
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static int duration = 0;
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struct sample {
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int pid;
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int seq;
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long value;
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char comm[16];
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};
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static int process_sample(void *ctx, void *data, size_t len)
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{
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int ring = (unsigned long)ctx;
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struct sample *s = data;
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switch (s->seq) {
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case 0:
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CHECK(ring != 1, "sample1_ring", "exp %d, got %d\n", 1, ring);
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CHECK(s->value != 333, "sample1_value", "exp %ld, got %ld\n",
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333L, s->value);
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break;
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case 1:
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CHECK(ring != 2, "sample2_ring", "exp %d, got %d\n", 2, ring);
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CHECK(s->value != 777, "sample2_value", "exp %ld, got %ld\n",
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777L, s->value);
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break;
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default:
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CHECK(true, "extra_sample", "unexpected sample seq %d, val %ld\n",
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s->seq, s->value);
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return -1;
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}
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return 0;
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}
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void test_ringbuf_multi(void)
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{
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struct test_ringbuf_multi *skel;
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struct ring_buffer *ringbuf;
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int err;
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skel = test_ringbuf_multi__open_and_load();
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if (CHECK(!skel, "skel_open_load", "skeleton open&load failed\n"))
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return;
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/* only trigger BPF program for current process */
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skel->bss->pid = getpid();
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ringbuf = ring_buffer__new(bpf_map__fd(skel->maps.ringbuf1),
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process_sample, (void *)(long)1, NULL);
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if (CHECK(!ringbuf, "ringbuf_create", "failed to create ringbuf\n"))
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goto cleanup;
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err = ring_buffer__add(ringbuf, bpf_map__fd(skel->maps.ringbuf2),
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process_sample, (void *)(long)2);
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if (CHECK(err, "ringbuf_add", "failed to add another ring\n"))
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goto cleanup;
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err = test_ringbuf_multi__attach(skel);
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if (CHECK(err, "skel_attach", "skeleton attachment failed: %d\n", err))
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goto cleanup;
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/* trigger few samples, some will be skipped */
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skel->bss->target_ring = 0;
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skel->bss->value = 333;
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syscall(__NR_getpgid);
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/* skipped, no ringbuf in slot 1 */
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skel->bss->target_ring = 1;
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skel->bss->value = 555;
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syscall(__NR_getpgid);
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skel->bss->target_ring = 2;
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skel->bss->value = 777;
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syscall(__NR_getpgid);
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/* poll for samples, should get 2 ringbufs back */
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err = ring_buffer__poll(ringbuf, -1);
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if (CHECK(err != 2, "poll_res", "expected 2 records, got %d\n", err))
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goto cleanup;
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/* expect extra polling to return nothing */
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err = ring_buffer__poll(ringbuf, 0);
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if (CHECK(err < 0, "extra_samples", "poll result: %d\n", err))
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goto cleanup;
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CHECK(skel->bss->dropped != 0, "err_dropped", "exp %ld, got %ld\n",
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0L, skel->bss->dropped);
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CHECK(skel->bss->skipped != 1, "err_skipped", "exp %ld, got %ld\n",
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1L, skel->bss->skipped);
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CHECK(skel->bss->total != 2, "err_total", "exp %ld, got %ld\n",
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2L, skel->bss->total);
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cleanup:
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ring_buffer__free(ringbuf);
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test_ringbuf_multi__destroy(skel);
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}
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