1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 3 #ifndef _LINUX_DROPREASON_CORE_H 4 #define _LINUX_DROPREASON_CORE_H 5 6 #define DEFINE_DROP_REASON(FN, FNe) \ 7 FN(NOT_SPECIFIED) \ 8 FN(NO_SOCKET) \ 9 FN(SOCKET_CLOSE) \ 10 FN(SOCKET_FILTER) \ 11 FN(SOCKET_RCVBUFF) \ 12 FN(UNIX_DISCONNECT) \ 13 FN(UNIX_SKIP_OOB) \ 14 FN(PKT_TOO_SMALL) \ 15 FN(TCP_CSUM) \ 16 FN(UDP_CSUM) \ 17 FN(NETFILTER_DROP) \ 18 FN(OTHERHOST) \ 19 FN(IP_CSUM) \ 20 FN(IP_INHDR) \ 21 FN(IP_RPFILTER) \ 22 FN(UNICAST_IN_L2_MULTICAST) \ 23 FN(XFRM_POLICY) \ 24 FN(IP_NOPROTO) \ 25 FN(PROTO_MEM) \ 26 FN(TCP_AUTH_HDR) \ 27 FN(TCP_MD5NOTFOUND) \ 28 FN(TCP_MD5UNEXPECTED) \ 29 FN(TCP_MD5FAILURE) \ 30 FN(TCP_AONOTFOUND) \ 31 FN(TCP_AOUNEXPECTED) \ 32 FN(TCP_AOKEYNOTFOUND) \ 33 FN(TCP_AOFAILURE) \ 34 FN(SOCKET_BACKLOG) \ 35 FN(TCP_FLAGS) \ 36 FN(TCP_ABORT_ON_DATA) \ 37 FN(TCP_ZEROWINDOW) \ 38 FN(TCP_OLD_DATA) \ 39 FN(TCP_OVERWINDOW) \ 40 FN(TCP_OFOMERGE) \ 41 FN(TCP_RFC7323_PAWS) \ 42 FN(TCP_RFC7323_PAWS_ACK) \ 43 FN(TCP_RFC7323_TW_PAWS) \ 44 FN(TCP_RFC7323_TSECR) \ 45 FN(TCP_LISTEN_OVERFLOW) \ 46 FN(TCP_OLD_SEQUENCE) \ 47 FN(TCP_INVALID_SEQUENCE) \ 48 FN(TCP_INVALID_END_SEQUENCE) \ 49 FN(TCP_INVALID_ACK_SEQUENCE) \ 50 FN(TCP_RESET) \ 51 FN(TCP_INVALID_SYN) \ 52 FN(TCP_CLOSE) \ 53 FN(TCP_FASTOPEN) \ 54 FN(TCP_OLD_ACK) \ 55 FN(TCP_TOO_OLD_ACK) \ 56 FN(TCP_ACK_UNSENT_DATA) \ 57 FN(TCP_OFO_QUEUE_PRUNE) \ 58 FN(TCP_OFO_DROP) \ 59 FN(IP_OUTNOROUTES) \ 60 FN(BPF_CGROUP_EGRESS) \ 61 FN(IPV6DISABLED) \ 62 FN(NEIGH_CREATEFAIL) \ 63 FN(NEIGH_FAILED) \ 64 FN(NEIGH_QUEUEFULL) \ 65 FN(NEIGH_DEAD) \ 66 FN(NEIGH_HH_FILLFAIL) \ 67 FN(TC_EGRESS) \ 68 FN(SECURITY_HOOK) \ 69 FN(QDISC_DROP) \ 70 FN(QDISC_BURST_DROP) \ 71 FN(QDISC_OVERLIMIT) \ 72 FN(QDISC_CONGESTED) \ 73 FN(CAKE_FLOOD) \ 74 FN(FQ_BAND_LIMIT) \ 75 FN(FQ_HORIZON_LIMIT) \ 76 FN(FQ_FLOW_LIMIT) \ 77 FN(CPU_BACKLOG) \ 78 FN(XDP) \ 79 FN(TC_INGRESS) \ 80 FN(UNHANDLED_PROTO) \ 81 FN(SKB_CSUM) \ 82 FN(SKB_GSO_SEG) \ 83 FN(SKB_UCOPY_FAULT) \ 84 FN(DEV_HDR) \ 85 FN(DEV_READY) \ 86 FN(FULL_RING) \ 87 FN(NOMEM) \ 88 FN(HDR_TRUNC) \ 89 FN(TAP_FILTER) \ 90 FN(TAP_TXFILTER) \ 91 FN(ICMP_CSUM) \ 92 FN(INVALID_PROTO) \ 93 FN(IP_INADDRERRORS) \ 94 FN(IP_INNOROUTES) \ 95 FN(IP_LOCAL_SOURCE) \ 96 FN(IP_INVALID_SOURCE) \ 97 FN(IP_LOCALNET) \ 98 FN(IP_INVALID_DEST) \ 99 FN(PKT_TOO_BIG) \ 100 FN(DUP_FRAG) \ 101 FN(FRAG_REASM_TIMEOUT) \ 102 FN(FRAG_TOO_FAR) \ 103 FN(TCP_MINTTL) \ 104 FN(IPV6_BAD_EXTHDR) \ 105 FN(IPV6_NDISC_FRAG) \ 106 FN(IPV6_NDISC_HOP_LIMIT) \ 107 FN(IPV6_NDISC_BAD_CODE) \ 108 FN(IPV6_NDISC_BAD_OPTIONS) \ 109 FN(IPV6_NDISC_NS_OTHERHOST) \ 110 FN(QUEUE_PURGE) \ 111 FN(TC_COOKIE_ERROR) \ 112 FN(PACKET_SOCK_ERROR) \ 113 FN(TC_CHAIN_NOTFOUND) \ 114 FN(TC_RECLASSIFY_LOOP) \ 115 FN(VXLAN_INVALID_HDR) \ 116 FN(VXLAN_VNI_NOT_FOUND) \ 117 FN(MAC_INVALID_SOURCE) \ 118 FN(VXLAN_ENTRY_EXISTS) \ 119 FN(NO_TX_TARGET) \ 120 FN(IP_TUNNEL_ECN) \ 121 FN(TUNNEL_TXINFO) \ 122 FN(LOCAL_MAC) \ 123 FN(ARP_PVLAN_DISABLE) \ 124 FN(MAC_IEEE_MAC_CONTROL) \ 125 FN(BRIDGE_INGRESS_STP_STATE) \ 126 FN(CAN_RX_INVALID_FRAME) \ 127 FN(CANFD_RX_INVALID_FRAME) \ 128 FN(CANXL_RX_INVALID_FRAME) \ 129 FN(PFMEMALLOC) \ 130 FN(DUALPI2_STEP_DROP) \ 131 FN(PSP_INPUT) \ 132 FN(PSP_OUTPUT) \ 133 FNe(MAX) 134 135 /** 136 * enum skb_drop_reason - the reasons of skb drops 137 * 138 * The reason of skb drop, which is used in kfree_skb_reason(). 139 */ 140 enum skb_drop_reason { 141 /** 142 * @SKB_NOT_DROPPED_YET: skb is not dropped yet (used for no-drop case) 143 */ 144 SKB_NOT_DROPPED_YET = 0, 145 /** @SKB_CONSUMED: packet has been consumed */ 146 SKB_CONSUMED, 147 /** @SKB_DROP_REASON_NOT_SPECIFIED: drop reason is not specified */ 148 SKB_DROP_REASON_NOT_SPECIFIED, 149 /** 150 * @SKB_DROP_REASON_NO_SOCKET: no valid socket that can be used. 151 * Reason could be one of three cases: 152 * 1) no established/listening socket found during lookup process 153 * 2) no valid request socket during 3WHS process 154 * 3) no valid child socket during 3WHS process 155 */ 156 SKB_DROP_REASON_NO_SOCKET, 157 /** @SKB_DROP_REASON_SOCKET_CLOSE: socket is close()d */ 158 SKB_DROP_REASON_SOCKET_CLOSE, 159 /** @SKB_DROP_REASON_SOCKET_FILTER: dropped by socket filter */ 160 SKB_DROP_REASON_SOCKET_FILTER, 161 /** @SKB_DROP_REASON_SOCKET_RCVBUFF: socket receive buff is full */ 162 SKB_DROP_REASON_SOCKET_RCVBUFF, 163 /** 164 * @SKB_DROP_REASON_UNIX_DISCONNECT: recv queue is purged when SOCK_DGRAM 165 * or SOCK_SEQPACKET socket re-connect()s to another socket or notices 166 * during send() that the peer has been close()d. 167 */ 168 SKB_DROP_REASON_UNIX_DISCONNECT, 169 /** 170 * @SKB_DROP_REASON_UNIX_SKIP_OOB: Out-Of-Band data is skipped by 171 * recv() without MSG_OOB so dropped. 172 */ 173 SKB_DROP_REASON_UNIX_SKIP_OOB, 174 /** @SKB_DROP_REASON_PKT_TOO_SMALL: packet size is too small */ 175 SKB_DROP_REASON_PKT_TOO_SMALL, 176 /** @SKB_DROP_REASON_TCP_CSUM: TCP checksum error */ 177 SKB_DROP_REASON_TCP_CSUM, 178 /** @SKB_DROP_REASON_UDP_CSUM: UDP checksum error */ 179 SKB_DROP_REASON_UDP_CSUM, 180 /** @SKB_DROP_REASON_NETFILTER_DROP: dropped by netfilter */ 181 SKB_DROP_REASON_NETFILTER_DROP, 182 /** 183 * @SKB_DROP_REASON_OTHERHOST: packet don't belong to current host 184 * (interface is in promisc mode) 185 */ 186 SKB_DROP_REASON_OTHERHOST, 187 /** @SKB_DROP_REASON_IP_CSUM: IP checksum error */ 188 SKB_DROP_REASON_IP_CSUM, 189 /** 190 * @SKB_DROP_REASON_IP_INHDR: there is something wrong with IP header (see 191 * IPSTATS_MIB_INHDRERRORS) 192 */ 193 SKB_DROP_REASON_IP_INHDR, 194 /** 195 * @SKB_DROP_REASON_IP_RPFILTER: IP rpfilter validate failed. see the 196 * document for rp_filter in ip-sysctl.rst for more information 197 */ 198 SKB_DROP_REASON_IP_RPFILTER, 199 /** 200 * @SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST: destination address of L2 is 201 * multicast, but L3 is unicast. 202 */ 203 SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST, 204 /** @SKB_DROP_REASON_XFRM_POLICY: xfrm policy check failed */ 205 SKB_DROP_REASON_XFRM_POLICY, 206 /** @SKB_DROP_REASON_IP_NOPROTO: no support for IP protocol */ 207 SKB_DROP_REASON_IP_NOPROTO, 208 /** 209 * @SKB_DROP_REASON_PROTO_MEM: proto memory limitation, such as 210 * udp packet drop out of udp_memory_allocated. 211 */ 212 SKB_DROP_REASON_PROTO_MEM, 213 /** 214 * @SKB_DROP_REASON_TCP_AUTH_HDR: TCP-MD5 or TCP-AO hashes are met 215 * twice or set incorrectly. 216 */ 217 SKB_DROP_REASON_TCP_AUTH_HDR, 218 /** 219 * @SKB_DROP_REASON_TCP_MD5NOTFOUND: no MD5 hash and one expected, 220 * corresponding to LINUX_MIB_TCPMD5NOTFOUND 221 */ 222 SKB_DROP_REASON_TCP_MD5NOTFOUND, 223 /** 224 * @SKB_DROP_REASON_TCP_MD5UNEXPECTED: MD5 hash and we're not expecting 225 * one, corresponding to LINUX_MIB_TCPMD5UNEXPECTED 226 */ 227 SKB_DROP_REASON_TCP_MD5UNEXPECTED, 228 /** 229 * @SKB_DROP_REASON_TCP_MD5FAILURE: MD5 hash and its wrong, corresponding 230 * to LINUX_MIB_TCPMD5FAILURE 231 */ 232 SKB_DROP_REASON_TCP_MD5FAILURE, 233 /** 234 * @SKB_DROP_REASON_TCP_AONOTFOUND: no TCP-AO hash and one was expected, 235 * corresponding to LINUX_MIB_TCPAOREQUIRED 236 */ 237 SKB_DROP_REASON_TCP_AONOTFOUND, 238 /** 239 * @SKB_DROP_REASON_TCP_AOUNEXPECTED: TCP-AO hash is present and it 240 * was not expected, corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 241 */ 242 SKB_DROP_REASON_TCP_AOUNEXPECTED, 243 /** 244 * @SKB_DROP_REASON_TCP_AOKEYNOTFOUND: TCP-AO key is unknown, 245 * corresponding to LINUX_MIB_TCPAOKEYNOTFOUND 246 */ 247 SKB_DROP_REASON_TCP_AOKEYNOTFOUND, 248 /** 249 * @SKB_DROP_REASON_TCP_AOFAILURE: TCP-AO hash is wrong, 250 * corresponding to LINUX_MIB_TCPAOBAD 251 */ 252 SKB_DROP_REASON_TCP_AOFAILURE, 253 /** 254 * @SKB_DROP_REASON_SOCKET_BACKLOG: failed to add skb to socket backlog ( 255 * see LINUX_MIB_TCPBACKLOGDROP) 256 */ 257 SKB_DROP_REASON_SOCKET_BACKLOG, 258 /** @SKB_DROP_REASON_TCP_FLAGS: TCP flags invalid */ 259 SKB_DROP_REASON_TCP_FLAGS, 260 /** 261 * @SKB_DROP_REASON_TCP_ABORT_ON_DATA: abort on data, corresponding to 262 * LINUX_MIB_TCPABORTONDATA 263 */ 264 SKB_DROP_REASON_TCP_ABORT_ON_DATA, 265 /** 266 * @SKB_DROP_REASON_TCP_ZEROWINDOW: TCP receive window size is zero, 267 * see LINUX_MIB_TCPZEROWINDOWDROP 268 */ 269 SKB_DROP_REASON_TCP_ZEROWINDOW, 270 /** 271 * @SKB_DROP_REASON_TCP_OLD_DATA: the TCP data received is already 272 * received before (spurious retrans may happened), see 273 * LINUX_MIB_DELAYEDACKLOST 274 */ 275 SKB_DROP_REASON_TCP_OLD_DATA, 276 /** 277 * @SKB_DROP_REASON_TCP_OVERWINDOW: the TCP data is out of window, 278 * the seq of the first byte exceed the right edges of receive 279 * window 280 */ 281 SKB_DROP_REASON_TCP_OVERWINDOW, 282 /** 283 * @SKB_DROP_REASON_TCP_OFOMERGE: the data of skb is already in the ofo 284 * queue, corresponding to LINUX_MIB_TCPOFOMERGE 285 */ 286 SKB_DROP_REASON_TCP_OFOMERGE, 287 /** 288 * @SKB_DROP_REASON_TCP_RFC7323_PAWS: PAWS check, corresponding to 289 * LINUX_MIB_PAWSESTABREJECTED, LINUX_MIB_PAWSACTIVEREJECTED 290 */ 291 SKB_DROP_REASON_TCP_RFC7323_PAWS, 292 /** 293 * @SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK: PAWS check, old ACK packet. 294 * Corresponds to LINUX_MIB_PAWS_OLD_ACK. 295 */ 296 SKB_DROP_REASON_TCP_RFC7323_PAWS_ACK, 297 /** 298 * @SKB_DROP_REASON_TCP_RFC7323_TW_PAWS: PAWS check, socket is in 299 * TIME_WAIT state. 300 * Corresponds to LINUX_MIB_PAWS_TW_REJECTED. 301 */ 302 SKB_DROP_REASON_TCP_RFC7323_TW_PAWS, 303 /** 304 * @SKB_DROP_REASON_TCP_RFC7323_TSECR: PAWS check, invalid TSEcr. 305 * Corresponds to LINUX_MIB_TSECRREJECTED. 306 */ 307 SKB_DROP_REASON_TCP_RFC7323_TSECR, 308 /** @SKB_DROP_REASON_TCP_LISTEN_OVERFLOW: listener queue full. */ 309 SKB_DROP_REASON_TCP_LISTEN_OVERFLOW, 310 /** @SKB_DROP_REASON_TCP_OLD_SEQUENCE: Old SEQ field (duplicate packet) */ 311 SKB_DROP_REASON_TCP_OLD_SEQUENCE, 312 /** @SKB_DROP_REASON_TCP_INVALID_SEQUENCE: Not acceptable SEQ field. */ 313 SKB_DROP_REASON_TCP_INVALID_SEQUENCE, 314 /** 315 * @SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE: 316 * Not acceptable END_SEQ field. 317 * Corresponds to LINUX_MIB_BEYOND_WINDOW. 318 */ 319 SKB_DROP_REASON_TCP_INVALID_END_SEQUENCE, 320 /** 321 * @SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE: Not acceptable ACK SEQ 322 * field because ack sequence is not in the window between snd_una 323 * and snd_nxt 324 */ 325 SKB_DROP_REASON_TCP_INVALID_ACK_SEQUENCE, 326 /** @SKB_DROP_REASON_TCP_RESET: Invalid RST packet */ 327 SKB_DROP_REASON_TCP_RESET, 328 /** 329 * @SKB_DROP_REASON_TCP_INVALID_SYN: Incoming packet has unexpected 330 * SYN flag 331 */ 332 SKB_DROP_REASON_TCP_INVALID_SYN, 333 /** @SKB_DROP_REASON_TCP_CLOSE: TCP socket in CLOSE state */ 334 SKB_DROP_REASON_TCP_CLOSE, 335 /** @SKB_DROP_REASON_TCP_FASTOPEN: dropped by FASTOPEN request socket */ 336 SKB_DROP_REASON_TCP_FASTOPEN, 337 /** @SKB_DROP_REASON_TCP_OLD_ACK: TCP ACK is old, but in window */ 338 SKB_DROP_REASON_TCP_OLD_ACK, 339 /** @SKB_DROP_REASON_TCP_TOO_OLD_ACK: TCP ACK is too old */ 340 SKB_DROP_REASON_TCP_TOO_OLD_ACK, 341 /** 342 * @SKB_DROP_REASON_TCP_ACK_UNSENT_DATA: TCP ACK for data we haven't 343 * sent yet 344 */ 345 SKB_DROP_REASON_TCP_ACK_UNSENT_DATA, 346 /** @SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE: pruned from TCP OFO queue */ 347 SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE, 348 /** @SKB_DROP_REASON_TCP_OFO_DROP: data already in receive queue */ 349 SKB_DROP_REASON_TCP_OFO_DROP, 350 /** @SKB_DROP_REASON_IP_OUTNOROUTES: route lookup failed */ 351 SKB_DROP_REASON_IP_OUTNOROUTES, 352 /** 353 * @SKB_DROP_REASON_BPF_CGROUP_EGRESS: dropped by BPF_PROG_TYPE_CGROUP_SKB 354 * eBPF program 355 */ 356 SKB_DROP_REASON_BPF_CGROUP_EGRESS, 357 /** @SKB_DROP_REASON_IPV6DISABLED: IPv6 is disabled on the device */ 358 SKB_DROP_REASON_IPV6DISABLED, 359 /** @SKB_DROP_REASON_NEIGH_CREATEFAIL: failed to create neigh entry */ 360 SKB_DROP_REASON_NEIGH_CREATEFAIL, 361 /** @SKB_DROP_REASON_NEIGH_FAILED: neigh entry in failed state */ 362 SKB_DROP_REASON_NEIGH_FAILED, 363 /** @SKB_DROP_REASON_NEIGH_QUEUEFULL: arp_queue for neigh entry is full */ 364 SKB_DROP_REASON_NEIGH_QUEUEFULL, 365 /** @SKB_DROP_REASON_NEIGH_DEAD: neigh entry is dead */ 366 SKB_DROP_REASON_NEIGH_DEAD, 367 /** @SKB_DROP_REASON_NEIGH_HH_FILLFAIL: failed to fill the device hard header */ 368 SKB_DROP_REASON_NEIGH_HH_FILLFAIL, 369 /** @SKB_DROP_REASON_TC_EGRESS: dropped in TC egress HOOK */ 370 SKB_DROP_REASON_TC_EGRESS, 371 /** @SKB_DROP_REASON_SECURITY_HOOK: dropped due to security HOOK */ 372 SKB_DROP_REASON_SECURITY_HOOK, 373 /** 374 * @SKB_DROP_REASON_QDISC_DROP: dropped by qdisc when packet outputting ( 375 * failed to enqueue to current qdisc) 376 */ 377 SKB_DROP_REASON_QDISC_DROP, 378 /** 379 * @SKB_DROP_REASON_QDISC_BURST_DROP: dropped when net.core.qdisc_max_burst 380 * limit is hit. 381 */ 382 SKB_DROP_REASON_QDISC_BURST_DROP, 383 /** 384 * @SKB_DROP_REASON_QDISC_OVERLIMIT: dropped by qdisc when a qdisc 385 * instance exceeds its total buffer size limit. 386 */ 387 SKB_DROP_REASON_QDISC_OVERLIMIT, 388 /** 389 * @SKB_DROP_REASON_QDISC_CONGESTED: dropped by a qdisc AQM algorithm 390 * due to congestion. 391 */ 392 SKB_DROP_REASON_QDISC_CONGESTED, 393 /** 394 * @SKB_DROP_REASON_CAKE_FLOOD: dropped by the flood protection part of 395 * CAKE qdisc AQM algorithm (BLUE). 396 */ 397 SKB_DROP_REASON_CAKE_FLOOD, 398 /** 399 * @SKB_DROP_REASON_FQ_BAND_LIMIT: dropped by fq qdisc when per band 400 * limit is reached. 401 */ 402 SKB_DROP_REASON_FQ_BAND_LIMIT, 403 /** 404 * @SKB_DROP_REASON_FQ_HORIZON_LIMIT: dropped by fq qdisc when packet 405 * timestamp is too far in the future. 406 */ 407 SKB_DROP_REASON_FQ_HORIZON_LIMIT, 408 /** 409 * @SKB_DROP_REASON_FQ_FLOW_LIMIT: dropped by fq qdisc when a flow 410 * exceeds its limits. 411 */ 412 SKB_DROP_REASON_FQ_FLOW_LIMIT, 413 /** 414 * @SKB_DROP_REASON_CPU_BACKLOG: failed to enqueue the skb to the per CPU 415 * backlog queue. This can be caused by backlog queue full (see 416 * netdev_max_backlog in net.rst) or RPS flow limit 417 */ 418 SKB_DROP_REASON_CPU_BACKLOG, 419 /** @SKB_DROP_REASON_XDP: dropped by XDP in input path */ 420 SKB_DROP_REASON_XDP, 421 /** @SKB_DROP_REASON_TC_INGRESS: dropped in TC ingress HOOK */ 422 SKB_DROP_REASON_TC_INGRESS, 423 /** @SKB_DROP_REASON_UNHANDLED_PROTO: protocol not implemented or not supported */ 424 SKB_DROP_REASON_UNHANDLED_PROTO, 425 /** @SKB_DROP_REASON_SKB_CSUM: sk_buff checksum computation error */ 426 SKB_DROP_REASON_SKB_CSUM, 427 /** @SKB_DROP_REASON_SKB_GSO_SEG: gso segmentation error */ 428 SKB_DROP_REASON_SKB_GSO_SEG, 429 /** 430 * @SKB_DROP_REASON_SKB_UCOPY_FAULT: failed to copy data from user space, 431 * e.g., via zerocopy_sg_from_iter() or skb_orphan_frags_rx() 432 */ 433 SKB_DROP_REASON_SKB_UCOPY_FAULT, 434 /** @SKB_DROP_REASON_DEV_HDR: device driver specific header/metadata is invalid */ 435 SKB_DROP_REASON_DEV_HDR, 436 /** 437 * @SKB_DROP_REASON_DEV_READY: the device is not ready to xmit/recv due to 438 * any of its data structure that is not up/ready/initialized, 439 * e.g., the IFF_UP is not set, or driver specific tun->tfiles[txq] 440 * is not initialized 441 */ 442 SKB_DROP_REASON_DEV_READY, 443 /** @SKB_DROP_REASON_FULL_RING: ring buffer is full */ 444 SKB_DROP_REASON_FULL_RING, 445 /** @SKB_DROP_REASON_NOMEM: error due to OOM */ 446 SKB_DROP_REASON_NOMEM, 447 /** 448 * @SKB_DROP_REASON_HDR_TRUNC: failed to trunc/extract the header from 449 * networking data, e.g., failed to pull the protocol header from 450 * frags via pskb_may_pull() 451 */ 452 SKB_DROP_REASON_HDR_TRUNC, 453 /** 454 * @SKB_DROP_REASON_TAP_FILTER: dropped by (ebpf) filter directly attached 455 * to tun/tap, e.g., via TUNSETFILTEREBPF 456 */ 457 SKB_DROP_REASON_TAP_FILTER, 458 /** 459 * @SKB_DROP_REASON_TAP_TXFILTER: dropped by tx filter implemented at 460 * tun/tap, e.g., check_filter() 461 */ 462 SKB_DROP_REASON_TAP_TXFILTER, 463 /** @SKB_DROP_REASON_ICMP_CSUM: ICMP checksum error */ 464 SKB_DROP_REASON_ICMP_CSUM, 465 /** 466 * @SKB_DROP_REASON_INVALID_PROTO: the packet doesn't follow RFC 2211, 467 * such as a broadcasts ICMP_TIMESTAMP 468 */ 469 SKB_DROP_REASON_INVALID_PROTO, 470 /** 471 * @SKB_DROP_REASON_IP_INADDRERRORS: host unreachable, corresponding to 472 * IPSTATS_MIB_INADDRERRORS 473 */ 474 SKB_DROP_REASON_IP_INADDRERRORS, 475 /** 476 * @SKB_DROP_REASON_IP_INNOROUTES: network unreachable, corresponding to 477 * IPSTATS_MIB_INADDRERRORS 478 */ 479 SKB_DROP_REASON_IP_INNOROUTES, 480 /** @SKB_DROP_REASON_IP_LOCAL_SOURCE: the source ip is local */ 481 SKB_DROP_REASON_IP_LOCAL_SOURCE, 482 /** 483 * @SKB_DROP_REASON_IP_INVALID_SOURCE: the source ip is invalid: 484 * 1) source ip is multicast or limited broadcast 485 * 2) source ip is zero and not IGMP 486 */ 487 SKB_DROP_REASON_IP_INVALID_SOURCE, 488 /** @SKB_DROP_REASON_IP_LOCALNET: source or dest ip is local net */ 489 SKB_DROP_REASON_IP_LOCALNET, 490 /** 491 * @SKB_DROP_REASON_IP_INVALID_DEST: the dest ip is invalid: 492 * 1) dest ip is 0 493 */ 494 SKB_DROP_REASON_IP_INVALID_DEST, 495 /** 496 * @SKB_DROP_REASON_PKT_TOO_BIG: packet size is too big (maybe exceed the 497 * MTU) 498 */ 499 SKB_DROP_REASON_PKT_TOO_BIG, 500 /** @SKB_DROP_REASON_DUP_FRAG: duplicate fragment */ 501 SKB_DROP_REASON_DUP_FRAG, 502 /** @SKB_DROP_REASON_FRAG_REASM_TIMEOUT: fragment reassembly timeout */ 503 SKB_DROP_REASON_FRAG_REASM_TIMEOUT, 504 /** 505 * @SKB_DROP_REASON_FRAG_TOO_FAR: ipv4 fragment too far. 506 * (/proc/sys/net/ipv4/ipfrag_max_dist) 507 */ 508 SKB_DROP_REASON_FRAG_TOO_FAR, 509 /** 510 * @SKB_DROP_REASON_TCP_MINTTL: ipv4 ttl or ipv6 hoplimit below 511 * the threshold (IP_MINTTL or IPV6_MINHOPCOUNT). 512 */ 513 SKB_DROP_REASON_TCP_MINTTL, 514 /** @SKB_DROP_REASON_IPV6_BAD_EXTHDR: Bad IPv6 extension header. */ 515 SKB_DROP_REASON_IPV6_BAD_EXTHDR, 516 /** @SKB_DROP_REASON_IPV6_NDISC_FRAG: invalid frag (suppress_frag_ndisc). */ 517 SKB_DROP_REASON_IPV6_NDISC_FRAG, 518 /** @SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT: invalid hop limit. */ 519 SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT, 520 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code. */ 521 SKB_DROP_REASON_IPV6_NDISC_BAD_CODE, 522 /** @SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS: invalid NDISC options. */ 523 SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS, 524 /** 525 * @SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST: NEIGHBOUR SOLICITATION 526 * for another host. 527 */ 528 SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST, 529 /** @SKB_DROP_REASON_QUEUE_PURGE: bulk free. */ 530 SKB_DROP_REASON_QUEUE_PURGE, 531 /** 532 * @SKB_DROP_REASON_TC_COOKIE_ERROR: An error occurred whilst 533 * processing a tc ext cookie. 534 */ 535 SKB_DROP_REASON_TC_COOKIE_ERROR, 536 /** 537 * @SKB_DROP_REASON_PACKET_SOCK_ERROR: generic packet socket errors 538 * after its filter matches an incoming packet. 539 */ 540 SKB_DROP_REASON_PACKET_SOCK_ERROR, 541 /** @SKB_DROP_REASON_TC_CHAIN_NOTFOUND: tc chain lookup failed. */ 542 SKB_DROP_REASON_TC_CHAIN_NOTFOUND, 543 /** 544 * @SKB_DROP_REASON_TC_RECLASSIFY_LOOP: tc exceeded max reclassify loop 545 * iterations. 546 */ 547 SKB_DROP_REASON_TC_RECLASSIFY_LOOP, 548 /** 549 * @SKB_DROP_REASON_VXLAN_INVALID_HDR: VXLAN header is invalid. E.g.: 550 * 1) reserved fields are not zero 551 * 2) "I" flag is not set 552 */ 553 SKB_DROP_REASON_VXLAN_INVALID_HDR, 554 /** @SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND: no VXLAN device found for VNI */ 555 SKB_DROP_REASON_VXLAN_VNI_NOT_FOUND, 556 /** @SKB_DROP_REASON_MAC_INVALID_SOURCE: source mac is invalid */ 557 SKB_DROP_REASON_MAC_INVALID_SOURCE, 558 /** 559 * @SKB_DROP_REASON_VXLAN_ENTRY_EXISTS: trying to migrate a static 560 * entry or an entry pointing to a nexthop. 561 */ 562 SKB_DROP_REASON_VXLAN_ENTRY_EXISTS, 563 /** @SKB_DROP_REASON_NO_TX_TARGET: no target found for xmit */ 564 SKB_DROP_REASON_NO_TX_TARGET, 565 /** 566 * @SKB_DROP_REASON_IP_TUNNEL_ECN: skb is dropped according to 567 * RFC 6040 4.2, see __INET_ECN_decapsulate() for detail. 568 */ 569 SKB_DROP_REASON_IP_TUNNEL_ECN, 570 /** 571 * @SKB_DROP_REASON_TUNNEL_TXINFO: packet without necessary metadata 572 * reached a device which is in "external" mode. 573 */ 574 SKB_DROP_REASON_TUNNEL_TXINFO, 575 /** 576 * @SKB_DROP_REASON_LOCAL_MAC: the source MAC address is equal to 577 * the MAC address of the local netdev. 578 */ 579 SKB_DROP_REASON_LOCAL_MAC, 580 /** 581 * @SKB_DROP_REASON_ARP_PVLAN_DISABLE: packet which is not IP is 582 * forwarded to the in_dev, and the proxy_arp_pvlan is not 583 * enabled. 584 */ 585 SKB_DROP_REASON_ARP_PVLAN_DISABLE, 586 /** 587 * @SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL: the destination MAC address 588 * is an IEEE MAC Control address. 589 */ 590 SKB_DROP_REASON_MAC_IEEE_MAC_CONTROL, 591 /** 592 * @SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE: the STP state of the 593 * ingress bridge port does not allow frames to be forwarded. 594 */ 595 SKB_DROP_REASON_BRIDGE_INGRESS_STP_STATE, 596 /** 597 * @SKB_DROP_REASON_CAN_RX_INVALID_FRAME: received 598 * non conform CAN frame (or device is unable to receive CAN frames) 599 */ 600 SKB_DROP_REASON_CAN_RX_INVALID_FRAME, 601 /** 602 * @SKB_DROP_REASON_CANFD_RX_INVALID_FRAME: received 603 * non conform CAN-FD frame (or device is unable to receive CAN frames) 604 */ 605 SKB_DROP_REASON_CANFD_RX_INVALID_FRAME, 606 /** 607 * @SKB_DROP_REASON_CANXL_RX_INVALID_FRAME: received 608 * non conform CAN-XL frame (or device is unable to receive CAN frames) 609 */ 610 SKB_DROP_REASON_CANXL_RX_INVALID_FRAME, 611 /** 612 * @SKB_DROP_REASON_PFMEMALLOC: packet allocated from memory reserve 613 * reached a path or socket not eligible for use of memory reserves 614 */ 615 SKB_DROP_REASON_PFMEMALLOC, 616 /** 617 * @SKB_DROP_REASON_DUALPI2_STEP_DROP: dropped by the step drop 618 * threshold of DualPI2 qdisc. 619 */ 620 SKB_DROP_REASON_DUALPI2_STEP_DROP, 621 /** @SKB_DROP_REASON_PSP_INPUT: PSP input checks failed */ 622 SKB_DROP_REASON_PSP_INPUT, 623 /** @SKB_DROP_REASON_PSP_OUTPUT: PSP output checks failed */ 624 SKB_DROP_REASON_PSP_OUTPUT, 625 /** 626 * @SKB_DROP_REASON_MAX: the maximum of core drop reasons, which 627 * shouldn't be used as a real 'reason' - only for tracing code gen 628 */ 629 SKB_DROP_REASON_MAX, 630 631 /** 632 * @SKB_DROP_REASON_SUBSYS_MASK: subsystem mask in drop reasons, 633 * see &enum skb_drop_reason_subsys 634 */ 635 SKB_DROP_REASON_SUBSYS_MASK = 0xffff0000, 636 }; 637 638 #define SKB_DROP_REASON_SUBSYS_SHIFT 16 639 640 #define SKB_DR_INIT(name, reason) \ 641 enum skb_drop_reason name = SKB_DROP_REASON_##reason 642 #define SKB_DR(name) \ 643 SKB_DR_INIT(name, NOT_SPECIFIED) 644 #define SKB_DR_SET(name, reason) \ 645 (name = SKB_DROP_REASON_##reason) 646 #define SKB_DR_OR(name, reason) \ 647 do { \ 648 if (name == SKB_DROP_REASON_NOT_SPECIFIED || \ 649 name == SKB_NOT_DROPPED_YET) \ 650 SKB_DR_SET(name, reason); \ 651 } while (0) 652 653 #endif 654