83e4b88be1
Add a test that will attach a FENTRY and FEXIT program to the XDP test program. It will also verify data from the XDP context on FENTRY and verifies the return code on exit. Signed-off-by: Eelco Chaudron <echaudro@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/157909410480.47481.11202505690938004673.stgit@xdp-tutorial
66 lines
2.0 KiB
C
66 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <test_progs.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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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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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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DECLARE_LIBBPF_OPTS(bpf_object_open_opts, 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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opts.attach_prog_fd = pkt_fd,
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ftrace_skel = test_xdp_bpf2bpf__open_opts(&opts);
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if (CHECK(!ftrace_skel, "__open", "ftrace skeleton failed\n"))
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goto out;
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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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/* 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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/* 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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test_xdp__destroy(pkt_skel);
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test_xdp_bpf2bpf__destroy(ftrace_skel);
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}
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