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_devmap_helpers.skel.h" 7 #include "test_xdp_with_devmap_frags_helpers.skel.h" 8 #include "test_xdp_with_devmap_helpers.skel.h" 9 10 #define IFINDEX_LO 1 11 12 static void test_xdp_with_devmap_helpers(void) 13 { 14 struct test_xdp_with_devmap_helpers *skel; 15 struct bpf_prog_info info = {}; 16 struct bpf_devmap_val val = { 17 .ifindex = IFINDEX_LO, 18 }; 19 __u32 len = sizeof(info); 20 int err, dm_fd, map_fd; 21 __u32 idx = 0; 22 23 24 skel = test_xdp_with_devmap_helpers__open_and_load(); 25 if (!ASSERT_OK_PTR(skel, "test_xdp_with_devmap_helpers__open_and_load")) 26 return; 27 28 dm_fd = bpf_program__fd(skel->progs.xdp_redir_prog); 29 err = bpf_xdp_attach(IFINDEX_LO, dm_fd, XDP_FLAGS_SKB_MODE, NULL); 30 if (!ASSERT_OK(err, "Generic attach of program with 8-byte devmap")) 31 goto out_close; 32 33 err = bpf_xdp_detach(IFINDEX_LO, XDP_FLAGS_SKB_MODE, NULL); 34 ASSERT_OK(err, "XDP program detach"); 35 36 dm_fd = bpf_program__fd(skel->progs.xdp_dummy_dm); 37 map_fd = bpf_map__fd(skel->maps.dm_ports); 38 err = bpf_obj_get_info_by_fd(dm_fd, &info, &len); 39 if (!ASSERT_OK(err, "bpf_obj_get_info_by_fd")) 40 goto out_close; 41 42 val.bpf_prog.fd = dm_fd; 43 err = bpf_map_update_elem(map_fd, &idx, &val, 0); 44 ASSERT_OK(err, "Add program to devmap entry"); 45 46 err = bpf_map_lookup_elem(map_fd, &idx, &val); 47 ASSERT_OK(err, "Read devmap entry"); 48 ASSERT_EQ(info.id, val.bpf_prog.id, "Match program id to devmap entry prog_id"); 49 50 /* can not attach BPF_XDP_DEVMAP program to a device */ 51 err = bpf_xdp_attach(IFINDEX_LO, dm_fd, XDP_FLAGS_SKB_MODE, NULL); 52 if (!ASSERT_NEQ(err, 0, "Attach of BPF_XDP_DEVMAP program")) 53 bpf_xdp_detach(IFINDEX_LO, XDP_FLAGS_SKB_MODE, NULL); 54 55 val.ifindex = 1; 56 val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_prog); 57 err = bpf_map_update_elem(map_fd, &idx, &val, 0); 58 ASSERT_NEQ(err, 0, "Add non-BPF_XDP_DEVMAP program to devmap entry"); 59 60 /* Try to attach BPF_XDP program with frags to devmap when we have 61 * already loaded a BPF_XDP program on the map 62 */ 63 idx = 1; 64 val.ifindex = 1; 65 val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_dm_frags); 66 err = bpf_map_update_elem(map_fd, &idx, &val, 0); 67 ASSERT_NEQ(err, 0, "Add BPF_XDP program with frags to devmap entry"); 68 69 out_close: 70 test_xdp_with_devmap_helpers__destroy(skel); 71 } 72 73 static void test_neg_xdp_devmap_helpers(void) 74 { 75 struct test_xdp_devmap_helpers *skel; 76 77 skel = test_xdp_devmap_helpers__open_and_load(); 78 if (!ASSERT_EQ(skel, NULL, 79 "Load of XDP program accessing egress ifindex without attach type")) { 80 test_xdp_devmap_helpers__destroy(skel); 81 } 82 } 83 84 static void test_xdp_with_devmap_frags_helpers(void) 85 { 86 struct test_xdp_with_devmap_frags_helpers *skel; 87 struct bpf_prog_info info = {}; 88 struct bpf_devmap_val val = { 89 .ifindex = IFINDEX_LO, 90 }; 91 __u32 len = sizeof(info); 92 int err, dm_fd_frags, map_fd; 93 __u32 idx = 0; 94 95 skel = test_xdp_with_devmap_frags_helpers__open_and_load(); 96 if (!ASSERT_OK_PTR(skel, "test_xdp_with_devmap_helpers__open_and_load")) 97 return; 98 99 dm_fd_frags = bpf_program__fd(skel->progs.xdp_dummy_dm_frags); 100 map_fd = bpf_map__fd(skel->maps.dm_ports); 101 err = bpf_obj_get_info_by_fd(dm_fd_frags, &info, &len); 102 if (!ASSERT_OK(err, "bpf_obj_get_info_by_fd")) 103 goto out_close; 104 105 val.bpf_prog.fd = dm_fd_frags; 106 err = bpf_map_update_elem(map_fd, &idx, &val, 0); 107 ASSERT_OK(err, "Add frags program to devmap entry"); 108 109 err = bpf_map_lookup_elem(map_fd, &idx, &val); 110 ASSERT_OK(err, "Read devmap entry"); 111 ASSERT_EQ(info.id, val.bpf_prog.id, 112 "Match program id to devmap entry prog_id"); 113 114 /* Try to attach BPF_XDP program to devmap when we have 115 * already loaded a BPF_XDP program with frags on the map 116 */ 117 idx = 1; 118 val.ifindex = 1; 119 val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_dm); 120 err = bpf_map_update_elem(map_fd, &idx, &val, 0); 121 ASSERT_NEQ(err, 0, "Add BPF_XDP program to devmap entry"); 122 123 out_close: 124 test_xdp_with_devmap_frags_helpers__destroy(skel); 125 } 126 127 void serial_test_xdp_devmap_attach(void) 128 { 129 if (test__start_subtest("DEVMAP with programs in entries")) 130 test_xdp_with_devmap_helpers(); 131 132 if (test__start_subtest("DEVMAP with frags programs in entries")) 133 test_xdp_with_devmap_frags_helpers(); 134 135 if (test__start_subtest("Verifier check of DEVMAP programs")) 136 test_neg_xdp_devmap_helpers(); 137 } 138