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