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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
129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <test_progs.h>
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#include <network_helpers.h>
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#include <net/if.h>
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#include "test_xdp.skel.h"
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#include "test_xdp_bpf2bpf.skel.h"
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struct meta {
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int ifindex;
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int pkt_len;
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};
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static void on_sample(void *ctx, int cpu, void *data, __u32 size)
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{
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int duration = 0;
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struct meta *meta = (struct meta *)data;
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struct ipv4_packet *trace_pkt_v4 = data + sizeof(*meta);
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if (CHECK(size < sizeof(pkt_v4) + sizeof(*meta),
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"check_size", "size %u < %zu\n",
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size, sizeof(pkt_v4) + sizeof(*meta)))
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return;
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if (CHECK(meta->ifindex != if_nametoindex("lo"), "check_meta_ifindex",
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"meta->ifindex = %d\n", meta->ifindex))
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return;
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if (CHECK(meta->pkt_len != sizeof(pkt_v4), "check_meta_pkt_len",
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"meta->pkt_len = %zd\n", sizeof(pkt_v4)))
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return;
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if (CHECK(memcmp(trace_pkt_v4, &pkt_v4, sizeof(pkt_v4)),
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"check_packet_content", "content not the same\n"))
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return;
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*(bool *)ctx = true;
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}
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void test_xdp_bpf2bpf(void)
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{
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__u32 duration = 0, retval, size;
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char buf[128];
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int err, pkt_fd, map_fd;
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bool passed = false;
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struct iphdr *iph = (void *)buf + sizeof(struct ethhdr);
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struct iptnl_info value4 = {.family = AF_INET};
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struct test_xdp *pkt_skel = NULL;
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struct test_xdp_bpf2bpf *ftrace_skel = NULL;
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struct vip key4 = {.protocol = 6, .family = AF_INET};
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struct bpf_program *prog;
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struct perf_buffer *pb = NULL;
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struct perf_buffer_opts pb_opts = {};
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/* Load XDP program to introspect */
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pkt_skel = test_xdp__open_and_load();
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if (CHECK(!pkt_skel, "pkt_skel_load", "test_xdp skeleton failed\n"))
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return;
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pkt_fd = bpf_program__fd(pkt_skel->progs._xdp_tx_iptunnel);
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map_fd = bpf_map__fd(pkt_skel->maps.vip2tnl);
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bpf_map_update_elem(map_fd, &key4, &value4, 0);
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/* Load trace program */
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ftrace_skel = test_xdp_bpf2bpf__open();
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if (CHECK(!ftrace_skel, "__open", "ftrace skeleton failed\n"))
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goto out;
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/* Demonstrate the bpf_program__set_attach_target() API rather than
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* the load with options, i.e. opts.attach_prog_fd.
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*/
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prog = ftrace_skel->progs.trace_on_entry;
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bpf_program__set_expected_attach_type(prog, BPF_TRACE_FENTRY);
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bpf_program__set_attach_target(prog, pkt_fd, "_xdp_tx_iptunnel");
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prog = ftrace_skel->progs.trace_on_exit;
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bpf_program__set_expected_attach_type(prog, BPF_TRACE_FEXIT);
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bpf_program__set_attach_target(prog, pkt_fd, "_xdp_tx_iptunnel");
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err = test_xdp_bpf2bpf__load(ftrace_skel);
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if (CHECK(err, "__load", "ftrace skeleton failed\n"))
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goto out;
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err = test_xdp_bpf2bpf__attach(ftrace_skel);
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if (CHECK(err, "ftrace_attach", "ftrace attach failed: %d\n", err))
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goto out;
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/* Set up perf buffer */
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pb_opts.sample_cb = on_sample;
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pb_opts.ctx = &passed;
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pb = perf_buffer__new(bpf_map__fd(ftrace_skel->maps.perf_buf_map),
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1, &pb_opts);
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if (!ASSERT_OK_PTR(pb, "perf_buf__new"))
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goto out;
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/* Run test program */
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err = bpf_prog_test_run(pkt_fd, 1, &pkt_v4, sizeof(pkt_v4),
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buf, &size, &retval, &duration);
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if (CHECK(err || retval != XDP_TX || size != 74 ||
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iph->protocol != IPPROTO_IPIP, "ipv4",
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"err %d errno %d retval %d size %d\n",
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err, errno, retval, size))
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goto out;
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/* Make sure bpf_xdp_output() was triggered and it sent the expected
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* data to the perf ring buffer.
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*/
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err = perf_buffer__poll(pb, 100);
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if (CHECK(err < 0, "perf_buffer__poll", "err %d\n", err))
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goto out;
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CHECK_FAIL(!passed);
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/* Verify test results */
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if (CHECK(ftrace_skel->bss->test_result_fentry != if_nametoindex("lo"),
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"result", "fentry failed err %llu\n",
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ftrace_skel->bss->test_result_fentry))
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goto out;
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CHECK(ftrace_skel->bss->test_result_fexit != XDP_TX, "result",
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"fexit failed err %llu\n", ftrace_skel->bss->test_result_fexit);
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out:
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if (pb)
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perf_buffer__free(pb);
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test_xdp__destroy(pkt_skel);
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test_xdp_bpf2bpf__destroy(ftrace_skel);
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}
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