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