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