1 // SPDX-License-Identifier: GPL-2.0 2 #include <arpa/inet.h> 3 #include <uapi/linux/bpf.h> 4 #include <linux/if_link.h> 5 #include <network_helpers.h> 6 #include <net/if.h> 7 #include <test_progs.h> 8 9 #include "test_xdp_devmap_helpers.skel.h" 10 #include "test_xdp_with_devmap_frags_helpers.skel.h" 11 #include "test_xdp_with_devmap_helpers.skel.h" 12 13 #define IFINDEX_LO 1 14 #define TEST_NS "devmap_attach_ns" 15 16 static void test_xdp_with_devmap_helpers(void) 17 { 18 struct test_xdp_with_devmap_helpers *skel = NULL; 19 struct bpf_prog_info info = {}; 20 struct bpf_devmap_val val = { 21 .ifindex = IFINDEX_LO, 22 }; 23 __u32 len = sizeof(info); 24 int err, dm_fd, dm_fd_redir, map_fd; 25 struct nstoken *nstoken = NULL; 26 char data[10] = {}; 27 __u32 idx = 0; 28 29 SYS(out_close, "ip netns add %s", TEST_NS); 30 nstoken = open_netns(TEST_NS); 31 if (!ASSERT_OK_PTR(nstoken, "open_netns")) 32 goto out_close; 33 SYS(out_close, "ip link set dev lo up"); 34 35 skel = test_xdp_with_devmap_helpers__open_and_load(); 36 if (!ASSERT_OK_PTR(skel, "test_xdp_with_devmap_helpers__open_and_load")) 37 goto out_close; 38 39 dm_fd_redir = bpf_program__fd(skel->progs.xdp_redir_prog); 40 err = bpf_xdp_attach(IFINDEX_LO, dm_fd_redir, XDP_FLAGS_SKB_MODE, NULL); 41 if (!ASSERT_OK(err, "Generic attach of program with 8-byte devmap")) 42 goto out_close; 43 44 dm_fd = bpf_program__fd(skel->progs.xdp_dummy_dm); 45 map_fd = bpf_map__fd(skel->maps.dm_ports); 46 err = bpf_prog_get_info_by_fd(dm_fd, &info, &len); 47 if (!ASSERT_OK(err, "bpf_prog_get_info_by_fd")) 48 goto out_close; 49 50 val.bpf_prog.fd = dm_fd; 51 err = bpf_map_update_elem(map_fd, &idx, &val, 0); 52 ASSERT_OK(err, "Add program to devmap entry"); 53 54 err = bpf_map_lookup_elem(map_fd, &idx, &val); 55 ASSERT_OK(err, "Read devmap entry"); 56 ASSERT_EQ(info.id, val.bpf_prog.id, "Match program id to devmap entry prog_id"); 57 58 /* send a packet to trigger any potential bugs in there */ 59 DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts, 60 .data_in = &data, 61 .data_size_in = 10, 62 .flags = BPF_F_TEST_XDP_LIVE_FRAMES, 63 .repeat = 1, 64 ); 65 err = bpf_prog_test_run_opts(dm_fd_redir, &opts); 66 ASSERT_OK(err, "XDP test run"); 67 68 /* wait for the packets to be flushed */ 69 kern_sync_rcu(); 70 71 err = bpf_xdp_detach(IFINDEX_LO, XDP_FLAGS_SKB_MODE, NULL); 72 ASSERT_OK(err, "XDP program detach"); 73 74 /* can not attach BPF_XDP_DEVMAP program to a device */ 75 err = bpf_xdp_attach(IFINDEX_LO, dm_fd, XDP_FLAGS_SKB_MODE, NULL); 76 if (!ASSERT_NEQ(err, 0, "Attach of BPF_XDP_DEVMAP program")) 77 bpf_xdp_detach(IFINDEX_LO, XDP_FLAGS_SKB_MODE, NULL); 78 79 val.ifindex = 1; 80 val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_prog); 81 err = bpf_map_update_elem(map_fd, &idx, &val, 0); 82 ASSERT_NEQ(err, 0, "Add non-BPF_XDP_DEVMAP program to devmap entry"); 83 84 /* Try to attach BPF_XDP program with frags to devmap when we have 85 * already loaded a BPF_XDP program on the map 86 */ 87 idx = 1; 88 val.ifindex = 1; 89 val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_dm_frags); 90 err = bpf_map_update_elem(map_fd, &idx, &val, 0); 91 ASSERT_NEQ(err, 0, "Add BPF_XDP program with frags to devmap entry"); 92 93 out_close: 94 close_netns(nstoken); 95 SYS_NOFAIL("ip netns del %s", TEST_NS); 96 test_xdp_with_devmap_helpers__destroy(skel); 97 } 98 99 static void test_neg_xdp_devmap_helpers(void) 100 { 101 struct test_xdp_devmap_helpers *skel; 102 103 skel = test_xdp_devmap_helpers__open_and_load(); 104 if (!ASSERT_EQ(skel, NULL, 105 "Load of XDP program accessing egress ifindex without attach type")) { 106 test_xdp_devmap_helpers__destroy(skel); 107 } 108 } 109 110 static void test_xdp_with_devmap_frags_helpers(void) 111 { 112 struct test_xdp_with_devmap_frags_helpers *skel; 113 struct bpf_prog_info info = {}; 114 struct bpf_devmap_val val = { 115 .ifindex = IFINDEX_LO, 116 }; 117 __u32 len = sizeof(info); 118 int err, dm_fd_frags, map_fd; 119 __u32 idx = 0; 120 121 skel = test_xdp_with_devmap_frags_helpers__open_and_load(); 122 if (!ASSERT_OK_PTR(skel, "test_xdp_with_devmap_helpers__open_and_load")) 123 return; 124 125 dm_fd_frags = bpf_program__fd(skel->progs.xdp_dummy_dm_frags); 126 map_fd = bpf_map__fd(skel->maps.dm_ports); 127 err = bpf_prog_get_info_by_fd(dm_fd_frags, &info, &len); 128 if (!ASSERT_OK(err, "bpf_prog_get_info_by_fd")) 129 goto out_close; 130 131 val.bpf_prog.fd = dm_fd_frags; 132 err = bpf_map_update_elem(map_fd, &idx, &val, 0); 133 ASSERT_OK(err, "Add frags program to devmap entry"); 134 135 err = bpf_map_lookup_elem(map_fd, &idx, &val); 136 ASSERT_OK(err, "Read devmap entry"); 137 ASSERT_EQ(info.id, val.bpf_prog.id, 138 "Match program id to devmap entry prog_id"); 139 140 /* Try to attach BPF_XDP program to devmap when we have 141 * already loaded a BPF_XDP program with frags on the map 142 */ 143 idx = 1; 144 val.ifindex = 1; 145 val.bpf_prog.fd = bpf_program__fd(skel->progs.xdp_dummy_dm); 146 err = bpf_map_update_elem(map_fd, &idx, &val, 0); 147 ASSERT_NEQ(err, 0, "Add BPF_XDP program to devmap entry"); 148 149 out_close: 150 test_xdp_with_devmap_frags_helpers__destroy(skel); 151 } 152 153 static void test_xdp_with_devmap_helpers_veth(void) 154 { 155 struct test_xdp_with_devmap_helpers *skel = NULL; 156 struct bpf_prog_info info = {}; 157 struct bpf_devmap_val val = {}; 158 struct nstoken *nstoken = NULL; 159 __u32 len = sizeof(info); 160 int err, dm_fd, dm_fd_redir, map_fd, ifindex_dst; 161 char data[10] = {}; 162 __u32 idx = 0; 163 164 SYS(out_close, "ip netns add %s", TEST_NS); 165 nstoken = open_netns(TEST_NS); 166 if (!ASSERT_OK_PTR(nstoken, "open_netns")) 167 goto out_close; 168 169 SYS(out_close, "ip link add veth_src type veth peer name veth_dst"); 170 SYS(out_close, "ip link set dev veth_src up"); 171 SYS(out_close, "ip link set dev veth_dst up"); 172 173 val.ifindex = if_nametoindex("veth_src"); 174 ifindex_dst = if_nametoindex("veth_dst"); 175 if (!ASSERT_NEQ(val.ifindex, 0, "val.ifindex") || 176 !ASSERT_NEQ(ifindex_dst, 0, "ifindex_dst")) 177 goto out_close; 178 179 skel = test_xdp_with_devmap_helpers__open_and_load(); 180 if (!ASSERT_OK_PTR(skel, "test_xdp_with_devmap_helpers__open_and_load")) 181 goto out_close; 182 183 dm_fd_redir = bpf_program__fd(skel->progs.xdp_redir_prog); 184 err = bpf_xdp_attach(val.ifindex, dm_fd_redir, XDP_FLAGS_DRV_MODE, NULL); 185 if (!ASSERT_OK(err, "Attach of program with 8-byte devmap")) 186 goto out_close; 187 188 dm_fd = bpf_program__fd(skel->progs.xdp_dummy_dm); 189 map_fd = bpf_map__fd(skel->maps.dm_ports); 190 err = bpf_prog_get_info_by_fd(dm_fd, &info, &len); 191 if (!ASSERT_OK(err, "bpf_prog_get_info_by_fd")) 192 goto out_close; 193 194 val.bpf_prog.fd = dm_fd; 195 err = bpf_map_update_elem(map_fd, &idx, &val, 0); 196 ASSERT_OK(err, "Add program to devmap entry"); 197 198 err = bpf_map_lookup_elem(map_fd, &idx, &val); 199 ASSERT_OK(err, "Read devmap entry"); 200 ASSERT_EQ(info.id, val.bpf_prog.id, "Match program id to devmap entry prog_id"); 201 202 /* attach dummy to other side to enable reception */ 203 dm_fd = bpf_program__fd(skel->progs.xdp_dummy_prog); 204 err = bpf_xdp_attach(ifindex_dst, dm_fd, XDP_FLAGS_DRV_MODE, NULL); 205 if (!ASSERT_OK(err, "Attach of dummy XDP")) 206 goto out_close; 207 208 /* send a packet to trigger any potential bugs in there */ 209 DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts, 210 .data_in = &data, 211 .data_size_in = 10, 212 .flags = BPF_F_TEST_XDP_LIVE_FRAMES, 213 .repeat = 1, 214 ); 215 err = bpf_prog_test_run_opts(dm_fd_redir, &opts); 216 ASSERT_OK(err, "XDP test run"); 217 218 /* wait for the packets to be flushed */ 219 kern_sync_rcu(); 220 221 err = bpf_xdp_detach(val.ifindex, XDP_FLAGS_DRV_MODE, NULL); 222 ASSERT_OK(err, "XDP program detach"); 223 224 err = bpf_xdp_detach(ifindex_dst, XDP_FLAGS_DRV_MODE, NULL); 225 ASSERT_OK(err, "XDP program detach"); 226 227 out_close: 228 close_netns(nstoken); 229 SYS_NOFAIL("ip netns del %s", TEST_NS); 230 test_xdp_with_devmap_helpers__destroy(skel); 231 } 232 233 void serial_test_xdp_devmap_attach(void) 234 { 235 if (test__start_subtest("DEVMAP with programs in entries")) 236 test_xdp_with_devmap_helpers(); 237 238 if (test__start_subtest("DEVMAP with frags programs in entries")) 239 test_xdp_with_devmap_frags_helpers(); 240 241 if (test__start_subtest("Verifier check of DEVMAP programs")) 242 test_neg_xdp_devmap_helpers(); 243 244 if (test__start_subtest("DEVMAP with programs in entries on veth")) 245 test_xdp_with_devmap_helpers_veth(); 246 } 247