1 // SPDX-License-Identifier: GPL-2.0 2 #include <test_progs.h> 3 #include <net/if.h> 4 #include "test_xdp.skel.h" 5 #include "test_xdp_bpf2bpf.skel.h" 6 7 void test_xdp_bpf2bpf(void) 8 { 9 __u32 duration = 0, retval, size; 10 char buf[128]; 11 int err, pkt_fd, map_fd; 12 struct iphdr *iph = (void *)buf + sizeof(struct ethhdr); 13 struct iptnl_info value4 = {.family = AF_INET}; 14 struct test_xdp *pkt_skel = NULL; 15 struct test_xdp_bpf2bpf *ftrace_skel = NULL; 16 struct vip key4 = {.protocol = 6, .family = AF_INET}; 17 struct bpf_program *prog; 18 19 /* Load XDP program to introspect */ 20 pkt_skel = test_xdp__open_and_load(); 21 if (CHECK(!pkt_skel, "pkt_skel_load", "test_xdp skeleton failed\n")) 22 return; 23 24 pkt_fd = bpf_program__fd(pkt_skel->progs._xdp_tx_iptunnel); 25 26 map_fd = bpf_map__fd(pkt_skel->maps.vip2tnl); 27 bpf_map_update_elem(map_fd, &key4, &value4, 0); 28 29 /* Load trace program */ 30 ftrace_skel = test_xdp_bpf2bpf__open(); 31 if (CHECK(!ftrace_skel, "__open", "ftrace skeleton failed\n")) 32 goto out; 33 34 /* Demonstrate the bpf_program__set_attach_target() API rather than 35 * the load with options, i.e. opts.attach_prog_fd. 36 */ 37 prog = ftrace_skel->progs.trace_on_entry; 38 bpf_program__set_expected_attach_type(prog, BPF_TRACE_FENTRY); 39 bpf_program__set_attach_target(prog, pkt_fd, "_xdp_tx_iptunnel"); 40 41 prog = ftrace_skel->progs.trace_on_exit; 42 bpf_program__set_expected_attach_type(prog, BPF_TRACE_FEXIT); 43 bpf_program__set_attach_target(prog, pkt_fd, "_xdp_tx_iptunnel"); 44 45 err = test_xdp_bpf2bpf__load(ftrace_skel); 46 if (CHECK(err, "__load", "ftrace skeleton failed\n")) 47 goto out; 48 49 err = test_xdp_bpf2bpf__attach(ftrace_skel); 50 if (CHECK(err, "ftrace_attach", "ftrace attach failed: %d\n", err)) 51 goto out; 52 53 /* Run test program */ 54 err = bpf_prog_test_run(pkt_fd, 1, &pkt_v4, sizeof(pkt_v4), 55 buf, &size, &retval, &duration); 56 57 if (CHECK(err || retval != XDP_TX || size != 74 || 58 iph->protocol != IPPROTO_IPIP, "ipv4", 59 "err %d errno %d retval %d size %d\n", 60 err, errno, retval, size)) 61 goto out; 62 63 /* Verify test results */ 64 if (CHECK(ftrace_skel->bss->test_result_fentry != if_nametoindex("lo"), 65 "result", "fentry failed err %llu\n", 66 ftrace_skel->bss->test_result_fentry)) 67 goto out; 68 69 CHECK(ftrace_skel->bss->test_result_fexit != XDP_TX, "result", 70 "fexit failed err %llu\n", ftrace_skel->bss->test_result_fexit); 71 72 out: 73 test_xdp__destroy(pkt_skel); 74 test_xdp_bpf2bpf__destroy(ftrace_skel); 75 } 76