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