| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 2 | #undef TRACE_SYSTEM |
| 3 | #define TRACE_SYSTEM net |
| 4 | |
| 5 | #if !defined(LTTNG_TRACE_NET_H) || defined(TRACE_HEADER_MULTI_READ) |
| 6 | #define LTTNG_TRACE_NET_H |
| 7 | |
| 8 | #include <probes/lttng-tracepoint-event.h> |
| 9 | #include <linux/skbuff.h> |
| 10 | #include <linux/netdevice.h> |
| 11 | #include <linux/ip.h> |
| 12 | #include <linux/ipv6.h> |
| 13 | #include <linux/tcp.h> |
| 14 | #include <linux/version.h> |
| 15 | #include <lttng-endian.h> |
| 16 | #include <net/sock.h> |
| 17 | |
| 18 | #ifndef ONCE_LTTNG_NET_H |
| 19 | #define ONCE_LTTNG_NET_H |
| 20 | |
| 21 | static inline unsigned char __has_network_hdr(struct sk_buff *skb) |
| 22 | { |
| 23 | /* |
| 24 | * If the header is not set yet, the network header will point |
| 25 | * to the head. |
| 26 | */ |
| 27 | return skb_network_header(skb) != skb->head; |
| 28 | } |
| 29 | |
| 30 | static struct lttng_event_field emptyfields[] = { |
| 31 | }; |
| 32 | |
| 33 | /* Structures for transport headers. */ |
| 34 | |
| 35 | static struct lttng_event_field tcpfields[] = { |
| 36 | [0] = { |
| 37 | .name = "source_port", |
| 38 | .type = __type_integer(uint16_t, 0, 0, 0, |
| 39 | __BIG_ENDIAN, 10, none), |
| 40 | }, |
| 41 | [1] = { |
| 42 | .name = "dest_port", |
| 43 | .type = __type_integer(uint16_t, 0, 0, 0, |
| 44 | __BIG_ENDIAN, 10, none), |
| 45 | }, |
| 46 | [2] = { |
| 47 | .name = "seq", |
| 48 | .type = __type_integer(uint32_t, 0, 0, 0, |
| 49 | __BIG_ENDIAN, 10, none), |
| 50 | }, |
| 51 | [3] = { |
| 52 | .name = "ack_seq", |
| 53 | .type = __type_integer(uint32_t, 0, 0, 0, |
| 54 | __BIG_ENDIAN, 10, none), |
| 55 | }, |
| 56 | [4] = { |
| 57 | .name = "data_offset", |
| 58 | .type = __type_integer(uint8_t, 4, 4, 0, |
| 59 | __BIG_ENDIAN, 10, none), |
| 60 | }, |
| 61 | [5] = { |
| 62 | .name = "reserved", |
| 63 | .type = __type_integer(uint8_t, 3, 1, 0, |
| 64 | __BIG_ENDIAN, 10, none), |
| 65 | }, |
| 66 | [6] = { |
| 67 | .name = "flags", |
| 68 | .type = __type_integer(uint8_t, 9, 1, 0, |
| 69 | __BIG_ENDIAN, 16, none), |
| 70 | }, |
| 71 | [7] = { |
| 72 | .name = "window_size", |
| 73 | .type = __type_integer(uint16_t, 0, 0, 0, |
| 74 | __BIG_ENDIAN, 10, none), |
| 75 | }, |
| 76 | [8] = { |
| 77 | .name = "checksum", |
| 78 | .type = __type_integer(uint16_t, 0, 0, 0, |
| 79 | __BIG_ENDIAN, 16, none), |
| 80 | }, |
| 81 | [9] = { |
| 82 | .name = "urg_ptr", |
| 83 | .type = __type_integer(uint16_t, 0, 0, 0, |
| 84 | __BIG_ENDIAN, 10, none), |
| 85 | }, |
| 86 | }; |
| 87 | |
| 88 | static struct lttng_event_field transport_fields[] = { |
| 89 | [0] = { |
| 90 | .name = "unknown", |
| 91 | .type = { |
| 92 | .atype = atype_struct, |
| 93 | .u._struct.nr_fields = ARRAY_SIZE(emptyfields), |
| 94 | .u._struct.fields = emptyfields, |
| 95 | }, |
| 96 | }, |
| 97 | [1] = { |
| 98 | .name = "tcp", |
| 99 | .type = { |
| 100 | .atype = atype_struct, |
| 101 | .u._struct.nr_fields = ARRAY_SIZE(tcpfields), |
| 102 | .u._struct.fields = tcpfields, |
| 103 | }, |
| 104 | }, |
| 105 | }; |
| 106 | |
| 107 | enum transport_header_types { |
| 108 | TH_NONE = 0, |
| 109 | TH_TCP = 1, |
| 110 | }; |
| 111 | |
| 112 | static inline enum transport_header_types __get_transport_header_type(struct sk_buff *skb) |
| 113 | { |
| 114 | if (__has_network_hdr(skb)) { |
| 115 | /* |
| 116 | * When both transport and network headers are set, |
| 117 | * transport header is greater than network header, |
| 118 | * otherwise it points to head. |
| 119 | */ |
| 120 | if (skb->transport_header > skb->network_header) { |
| 121 | /* |
| 122 | * Get the transport protocol from the network |
| 123 | * header's data. This method works both for |
| 124 | * sent and received packets. |
| 125 | */ |
| 126 | if ((skb->protocol == htons(ETH_P_IP) && |
| 127 | ip_hdr(skb)->protocol == IPPROTO_TCP) || |
| 128 | (skb->protocol == htons(ETH_P_IPV6) && |
| 129 | ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)) |
| 130 | return TH_TCP; |
| 131 | } |
| 132 | /* Fallthrough for other cases where header is not TCP. */ |
| 133 | } |
| 134 | return TH_NONE; |
| 135 | } |
| 136 | |
| 137 | static struct lttng_enum_entry proto_transport_enum_entries[] = { |
| 138 | [0] = { |
| 139 | .start = { .value = 0, .signedness = 0, }, |
| 140 | .end = { .value = IPPROTO_TCP - 1, .signedness = 0, }, |
| 141 | .string = "_unknown", |
| 142 | }, |
| 143 | [1] = { |
| 144 | .start = { .value = IPPROTO_TCP, .signedness = 0, }, |
| 145 | .end = { .value = IPPROTO_TCP, .signedness = 0, }, |
| 146 | .string = "_tcp", |
| 147 | }, |
| 148 | [2] = { |
| 149 | .start = { .value = IPPROTO_TCP + 1, .signedness = 0, }, |
| 150 | .end = { .value = 255, .signedness = 0, }, |
| 151 | .string = "_unknown", |
| 152 | }, |
| 153 | }; |
| 154 | |
| 155 | static const struct lttng_enum_desc proto_transport_header_type = { |
| 156 | .name = "proto_transport_header_type", |
| 157 | .entries = proto_transport_enum_entries, |
| 158 | .nr_entries = ARRAY_SIZE(proto_transport_enum_entries), |
| 159 | }; |
| 160 | |
| 161 | static struct lttng_enum_entry transport_enum_entries[] = { |
| 162 | [0] = { |
| 163 | .start = { .value = TH_NONE, .signedness = 0, }, |
| 164 | .end = { .value = TH_NONE, .signedness = 0, }, |
| 165 | .string = "_unknown", |
| 166 | }, |
| 167 | [1] = { |
| 168 | .start = { .value = TH_TCP, .signedness = 0, }, |
| 169 | .end = { .value = TH_TCP, .signedness = 0, }, |
| 170 | .string = "_tcp", |
| 171 | }, |
| 172 | }; |
| 173 | |
| 174 | static const struct lttng_enum_desc transport_header_type = { |
| 175 | .name = "transport_header_type", |
| 176 | .entries = transport_enum_entries, |
| 177 | .nr_entries = ARRAY_SIZE(transport_enum_entries), |
| 178 | }; |
| 179 | |
| 180 | /* Structures for network headers. */ |
| 181 | |
| 182 | static struct lttng_event_field ipv4fields[] = { |
| 183 | [0] = { |
| 184 | .name = "version", |
| 185 | .type = __type_integer(uint8_t, 4, 4, 0, |
| 186 | __BIG_ENDIAN, 10, none), |
| 187 | }, |
| 188 | [1] = { |
| 189 | .name = "ihl", |
| 190 | .type = __type_integer(uint8_t, 4, 4, 0, |
| 191 | __BIG_ENDIAN, 10, none), |
| 192 | }, |
| 193 | [2] = { |
| 194 | .name = "tos", |
| 195 | .type = __type_integer(uint8_t, 0, 0, 0, |
| 196 | __BIG_ENDIAN, 10, none), |
| 197 | }, |
| 198 | [3] = { |
| 199 | .name = "tot_len", |
| 200 | .type = __type_integer(uint16_t, 0, 0, 0, |
| 201 | __BIG_ENDIAN, 10, none), |
| 202 | }, |
| 203 | [4] = { |
| 204 | .name = "id", |
| 205 | .type = __type_integer(uint16_t, 0, 0, 0, |
| 206 | __BIG_ENDIAN, 16, none), |
| 207 | }, |
| 208 | [5] = { |
| 209 | .name = "frag_off", |
| 210 | .type = __type_integer(uint16_t, 0, 0, 0, |
| 211 | __BIG_ENDIAN, 10, none), |
| 212 | }, |
| 213 | [6] = { |
| 214 | .name = "ttl", |
| 215 | .type = __type_integer(uint8_t, 0, 0, 0, |
| 216 | __BIG_ENDIAN, 10, none), |
| 217 | }, |
| 218 | [7] = { |
| 219 | .name = "protocol", |
| 220 | .type = { |
| 221 | .atype = atype_enum, |
| 222 | .u.basic.enumeration.desc = |
| 223 | &proto_transport_header_type, |
| 224 | .u.basic.enumeration.container_type = { |
| 225 | .size = 8, |
| 226 | .alignment = 8, |
| 227 | .signedness = 0, |
| 228 | .reverse_byte_order = |
| 229 | __BIG_ENDIAN != __BYTE_ORDER, |
| 230 | .base = 10, |
| 231 | .encoding = lttng_encode_none, |
| 232 | }, |
| 233 | }, |
| 234 | }, |
| 235 | [8] = { |
| 236 | .name = "checksum", |
| 237 | .type = __type_integer(uint16_t, 0, 0, 0, |
| 238 | __BIG_ENDIAN, 16, none), |
| 239 | }, |
| 240 | [9] = { |
| 241 | .name = "saddr", |
| 242 | .type = { |
| 243 | .atype = atype_array, |
| 244 | .u.array.elem_type = |
| 245 | __type_integer(uint8_t, 0, 0, 0, |
| 246 | __BIG_ENDIAN, 10, none), |
| 247 | .u.array.length = 4, |
| 248 | .u.array.elem_alignment = lttng_alignof(uint8_t), |
| 249 | }, |
| 250 | }, |
| 251 | [10] = { |
| 252 | .name = "daddr", |
| 253 | .type = { |
| 254 | .atype = atype_array, |
| 255 | .u.array.elem_type = |
| 256 | __type_integer(uint8_t, 0, 0, 0, |
| 257 | __BIG_ENDIAN, 10, none), |
| 258 | .u.array.length = 4, |
| 259 | .u.array.elem_alignment = lttng_alignof(uint8_t), |
| 260 | }, |
| 261 | }, |
| 262 | [11] = { |
| 263 | .name = "transport_header_type", |
| 264 | .type = { |
| 265 | .atype = atype_enum, |
| 266 | .u.basic.enumeration.desc = &transport_header_type, |
| 267 | .u.basic.enumeration.container_type = { |
| 268 | .size = 8, |
| 269 | .alignment = 8, |
| 270 | .signedness = 0, |
| 271 | .reverse_byte_order = 0, |
| 272 | .base = 10, |
| 273 | .encoding = lttng_encode_none, |
| 274 | }, |
| 275 | }, |
| 276 | }, |
| 277 | [12] = { |
| 278 | .name = "transport_header", |
| 279 | .type = { |
| 280 | .atype = atype_variant, |
| 281 | .u.variant.tag_name = "transport_header_type", |
| 282 | .u.variant.choices = transport_fields, |
| 283 | .u.variant.nr_choices = ARRAY_SIZE(transport_fields), |
| 284 | }, |
| 285 | }, |
| 286 | }; |
| 287 | |
| 288 | static struct lttng_event_field ipv6fields[] = { |
| 289 | [0] = { |
| 290 | .name = "version", |
| 291 | .type = __type_integer(uint8_t, 4, 4, 0, |
| 292 | __BIG_ENDIAN, 10, none), |
| 293 | }, |
| 294 | [1] = { |
| 295 | .name = "prio", |
| 296 | .type = __type_integer(uint8_t, 4, 4, 0, |
| 297 | __BIG_ENDIAN, 10, none), |
| 298 | }, |
| 299 | [2] = { |
| 300 | .name = "flow_lbl", |
| 301 | .type = { |
| 302 | .atype = atype_array, |
| 303 | .u.array.elem_type = |
| 304 | __type_integer(uint8_t, 0, 0, 0, |
| 305 | __BIG_ENDIAN, 16, none), |
| 306 | .u.array.length = 3, |
| 307 | .u.array.elem_alignment = lttng_alignof(uint8_t), |
| 308 | }, |
| 309 | }, |
| 310 | [3] = { |
| 311 | .name = "payload_len", |
| 312 | .type = __type_integer(uint16_t, 0, 0, 0, |
| 313 | __BIG_ENDIAN, 10, none), |
| 314 | }, |
| 315 | [4] = { |
| 316 | .name = "nexthdr", |
| 317 | .type = { |
| 318 | .atype = atype_enum, |
| 319 | .u.basic.enumeration.desc = |
| 320 | &proto_transport_header_type, |
| 321 | .u.basic.enumeration.container_type = { |
| 322 | .size = 8, |
| 323 | .alignment = 8, |
| 324 | .signedness = 0, |
| 325 | .reverse_byte_order = |
| 326 | __BIG_ENDIAN != __BYTE_ORDER, |
| 327 | .base = 10, |
| 328 | .encoding = lttng_encode_none, |
| 329 | }, |
| 330 | }, |
| 331 | }, |
| 332 | [5] = { |
| 333 | .name = "hop_limit", |
| 334 | .type = __type_integer(uint8_t, 0, 0, 0, |
| 335 | __BIG_ENDIAN, 10, none), |
| 336 | }, |
| 337 | [6] = { |
| 338 | .name = "saddr", |
| 339 | .type = { |
| 340 | .atype = atype_array, |
| 341 | .u.array.elem_type = |
| 342 | __type_integer(uint16_t, 0, 0, 0, |
| 343 | __BIG_ENDIAN, 16, none), |
| 344 | .u.array.length = 8, |
| 345 | .u.array.elem_alignment = lttng_alignof(uint16_t), |
| 346 | }, |
| 347 | }, |
| 348 | [7] = { |
| 349 | .name = "daddr", |
| 350 | .type = { |
| 351 | .atype = atype_array, |
| 352 | .u.array.elem_type = |
| 353 | __type_integer(uint16_t, 0, 0, 0, |
| 354 | __BIG_ENDIAN, 16, none), |
| 355 | .u.array.length = 8, |
| 356 | .u.array.elem_alignment = lttng_alignof(uint16_t), |
| 357 | }, |
| 358 | }, |
| 359 | [8] = { |
| 360 | .name = "transport_header_type", |
| 361 | .type = { |
| 362 | .atype = atype_enum, |
| 363 | .u.basic.enumeration.desc = &transport_header_type, |
| 364 | .u.basic.enumeration.container_type = { |
| 365 | .size = 8, |
| 366 | .alignment = 8, |
| 367 | .signedness = 0, |
| 368 | .reverse_byte_order = 0, |
| 369 | .base = 10, |
| 370 | .encoding = lttng_encode_none, |
| 371 | }, |
| 372 | }, |
| 373 | }, |
| 374 | [9] = { |
| 375 | .name = "transport_header", |
| 376 | .type = { |
| 377 | .atype = atype_variant, |
| 378 | .u.variant.tag_name = "transport_header_type", |
| 379 | .u.variant.choices = transport_fields, |
| 380 | .u.variant.nr_choices = ARRAY_SIZE(transport_fields), |
| 381 | }, |
| 382 | }, |
| 383 | }; |
| 384 | |
| 385 | static struct lttng_event_field network_fields[] = { |
| 386 | [0] = { |
| 387 | .name = "unknown", |
| 388 | .type = { |
| 389 | .atype = atype_struct, |
| 390 | .u._struct.nr_fields = 0, |
| 391 | .u._struct.fields = emptyfields, |
| 392 | }, |
| 393 | }, |
| 394 | [1] = { |
| 395 | .name = "ipv4", |
| 396 | .type = { |
| 397 | .atype = atype_struct, |
| 398 | .u._struct.nr_fields = ARRAY_SIZE(ipv4fields), |
| 399 | .u._struct.fields = ipv4fields, |
| 400 | }, |
| 401 | }, |
| 402 | [2] = { |
| 403 | .name = "ipv6", |
| 404 | .type = { |
| 405 | .atype = atype_struct, |
| 406 | .u._struct.nr_fields = ARRAY_SIZE(ipv6fields), |
| 407 | .u._struct.fields = ipv6fields, |
| 408 | }, |
| 409 | }, |
| 410 | }; |
| 411 | |
| 412 | enum network_header_types { |
| 413 | NH_NONE, |
| 414 | NH_IPV4, |
| 415 | NH_IPV6, |
| 416 | }; |
| 417 | |
| 418 | static inline unsigned char __get_network_header_type(struct sk_buff *skb) |
| 419 | { |
| 420 | if (__has_network_hdr(skb)) { |
| 421 | if (skb->protocol == htons(ETH_P_IPV6)) |
| 422 | return NH_IPV6; |
| 423 | else if (skb->protocol == htons(ETH_P_IP)) |
| 424 | return NH_IPV4; |
| 425 | /* Fallthrough for other header types. */ |
| 426 | } |
| 427 | return NH_NONE; |
| 428 | } |
| 429 | |
| 430 | #endif |
| 431 | |
| 432 | LTTNG_TRACEPOINT_ENUM(net_network_header, |
| 433 | TP_ENUM_VALUES( |
| 434 | ctf_enum_value("_unknown", NH_NONE) |
| 435 | ctf_enum_value("_ipv4", NH_IPV4) |
| 436 | ctf_enum_value("_ipv6", NH_IPV6) |
| 437 | ) |
| 438 | ) |
| 439 | |
| 440 | LTTNG_TRACEPOINT_EVENT(net_dev_xmit, |
| 441 | |
| 442 | TP_PROTO(struct sk_buff *skb, |
| 443 | int rc, |
| 444 | struct net_device *dev, |
| 445 | unsigned int skb_len), |
| 446 | |
| 447 | TP_ARGS(skb, rc, dev, skb_len), |
| 448 | |
| 449 | TP_FIELDS( |
| 450 | ctf_integer_hex(void *, skbaddr, skb) |
| 451 | ctf_integer(int, rc, rc) |
| 452 | ctf_integer(unsigned int, len, skb_len) |
| 453 | ctf_string(name, dev->name) |
| 454 | ) |
| 455 | ) |
| 456 | |
| 457 | LTTNG_TRACEPOINT_EVENT_CLASS(net_dev_template, |
| 458 | |
| 459 | TP_PROTO(struct sk_buff *skb), |
| 460 | |
| 461 | TP_ARGS(skb), |
| 462 | |
| 463 | TP_FIELDS( |
| 464 | ctf_integer_hex(void *, skbaddr, skb) |
| 465 | ctf_integer(unsigned int, len, skb->len) |
| 466 | ctf_string(name, skb->dev->name) |
| 467 | ctf_enum(net_network_header, unsigned char, |
| 468 | network_header_type, __get_network_header_type(skb)) |
| 469 | ctf_custom_field( |
| 470 | ctf_custom_type( |
| 471 | .atype = atype_variant, |
| 472 | .u.variant.tag_name = "network_header_type", |
| 473 | .u.variant.choices = network_fields, |
| 474 | .u.variant.nr_choices = |
| 475 | ARRAY_SIZE(network_fields), |
| 476 | ), |
| 477 | network_header, |
| 478 | ctf_custom_code( |
| 479 | bool has_network_header = false; |
| 480 | |
| 481 | /* Copy the network header. */ |
| 482 | switch (__get_network_header_type(skb)) { |
| 483 | case NH_IPV4: { |
| 484 | ctf_align(uint16_t) |
| 485 | ctf_array_type(uint8_t, ip_hdr(skb), |
| 486 | sizeof(struct iphdr)) |
| 487 | has_network_header = true; |
| 488 | break; |
| 489 | } |
| 490 | case NH_IPV6: { |
| 491 | ctf_align(uint16_t) |
| 492 | ctf_array_type(uint8_t, ipv6_hdr(skb), |
| 493 | sizeof(struct ipv6hdr)) |
| 494 | has_network_header = true; |
| 495 | break; |
| 496 | } |
| 497 | default: |
| 498 | /* |
| 499 | * For any other network header |
| 500 | * type, there is nothing to do. |
| 501 | */ |
| 502 | break; |
| 503 | } |
| 504 | |
| 505 | if (has_network_header) { |
| 506 | enum transport_header_types th_type = |
| 507 | __get_transport_header_type(skb); |
| 508 | |
| 509 | /* Transport header type field. */ |
| 510 | ctf_integer_type(unsigned char, th_type) |
| 511 | |
| 512 | /* Copy the transport header. */ |
| 513 | if (th_type == TH_TCP) { |
| 514 | ctf_align(uint32_t) |
| 515 | ctf_array_type(uint8_t, tcp_hdr(skb), |
| 516 | sizeof(struct tcphdr)) |
| 517 | } |
| 518 | /* |
| 519 | * For any other transport header type, |
| 520 | * there is nothing to do. |
| 521 | */ |
| 522 | } |
| 523 | ) |
| 524 | ) |
| 525 | ) |
| 526 | ) |
| 527 | |
| 528 | LTTNG_TRACEPOINT_EVENT_INSTANCE(net_dev_template, net_dev_queue, |
| 529 | |
| 530 | TP_PROTO(struct sk_buff *skb), |
| 531 | |
| 532 | TP_ARGS(skb) |
| 533 | ) |
| 534 | |
| 535 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_template, |
| 536 | |
| 537 | netif_receive_skb, |
| 538 | |
| 539 | net_if_receive_skb, |
| 540 | |
| 541 | TP_PROTO(struct sk_buff *skb), |
| 542 | |
| 543 | TP_ARGS(skb) |
| 544 | ) |
| 545 | |
| 546 | LTTNG_TRACEPOINT_EVENT_INSTANCE_MAP(net_dev_template, |
| 547 | |
| 548 | netif_rx, |
| 549 | |
| 550 | net_if_rx, |
| 551 | |
| 552 | TP_PROTO(struct sk_buff *skb), |
| 553 | |
| 554 | TP_ARGS(skb) |
| 555 | ) |
| 556 | #endif /* LTTNG_TRACE_NET_H */ |
| 557 | |
| 558 | /* This part must be outside protection */ |
| 559 | #include <probes/define_trace.h> |