include/net/dropreason-core.h

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