1 // SPDX-License-Identifier: GPL-2.0 2 #include <uapi/linux/bpf.h> 3 #include <linux/if_link.h> 4 #include <test_progs.h> 5 6 #include "test_xdp_with_cpumap_helpers.skel.h" 7 8 #define IFINDEX_LO 1 9 10 void test_xdp_cpumap_attach(void) 11 { 12 struct test_xdp_with_cpumap_helpers *skel; 13 struct bpf_prog_info info = {}; 14 __u32 len = sizeof(info); 15 struct bpf_cpumap_val val = { 16 .qsize = 192, 17 }; 18 int err, prog_fd, map_fd; 19 __u32 idx = 0; 20 21 skel = test_xdp_with_cpumap_helpers__open_and_load(); 22 if (!ASSERT_OK_PTR(skel, "test_xdp_with_cpumap_helpers__open_and_load")) 23 return; 24 25 prog_fd = bpf_program__fd(skel->progs.xdp_redir_prog); 26 err = bpf_set_link_xdp_fd(IFINDEX_LO, prog_fd, XDP_FLAGS_SKB_MODE); 27 if (!ASSERT_OK(err, "Generic attach of program with 8-byte CPUMAP")) 28 goto out_close; 29 30 err = bpf_set_link_xdp_fd(IFINDEX_LO, -1, XDP_FLAGS_SKB_MODE); 31 ASSERT_OK(err, "XDP program detach"); 32 33 prog_fd = bpf_program__fd(skel->progs.xdp_dummy_cm); 34 map_fd = bpf_map__fd(skel->maps.cpu_map); 35 err = bpf_obj_get_info_by_fd(prog_fd, &info, &len); 36 if (!ASSERT_OK(err, "bpf_obj_get_info_by_fd")) 37 goto out_close; 38 39 val.bpf_prog.fd = prog_fd; 40 err = bpf_map_update_elem(map_fd, &idx, &val, 0); 41 ASSERT_OK(err, "Add program to cpumap entry"); 42 43 err = bpf_map_lookup_elem(map_fd, &idx, &val); 44 ASSERT_OK(err, "Read cpumap entry"); 45 ASSERT_EQ(info.id, val.bpf_prog.id, "Match program id to cpumap entry prog_id"); 46 47 /* can not attach BPF_XDP_CPUMAP program to a device */ 48 err = bpf_set_link_xdp_fd(IFINDEX_LO, prog_fd, XDP_FLAGS_SKB_MODE); 49 if (!ASSERT_NEQ(err, 0, "Attach of BPF_XDP_CPUMAP program")) 50 bpf_set_link_xdp_fd(IFINDEX_LO, -1, XDP_FLAGS_SKB_MODE); 51 52 val.qsize = 192; 53 val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_prog); 54 err = bpf_map_update_elem(map_fd, &idx, &val, 0); 55 ASSERT_NEQ(err, 0, "Add non-BPF_XDP_CPUMAP program to cpumap entry"); 56 57 out_close: 58 test_xdp_with_cpumap_helpers__destroy(skel); 59 } 60