diff options
Diffstat (limited to 'include/net/dropreason.h')
| -rw-r--r-- | include/net/dropreason.h | 374 |
1 files changed, 27 insertions, 347 deletions
diff --git a/include/net/dropreason.h b/include/net/dropreason.h index c0a3ea806cd5..685fb37df8e8 100644 --- a/include/net/dropreason.h +++ b/include/net/dropreason.h @@ -2,362 +2,42 @@ #ifndef _LINUX_DROPREASON_H #define _LINUX_DROPREASON_H - -#define DEFINE_DROP_REASON(FN, FNe) \ - FN(NOT_SPECIFIED) \ - FN(NO_SOCKET) \ - FN(PKT_TOO_SMALL) \ - FN(TCP_CSUM) \ - FN(SOCKET_FILTER) \ - FN(UDP_CSUM) \ - FN(NETFILTER_DROP) \ - FN(OTHERHOST) \ - FN(IP_CSUM) \ - FN(IP_INHDR) \ - FN(IP_RPFILTER) \ - FN(UNICAST_IN_L2_MULTICAST) \ - FN(XFRM_POLICY) \ - FN(IP_NOPROTO) \ - FN(SOCKET_RCVBUFF) \ - FN(PROTO_MEM) \ - FN(TCP_MD5NOTFOUND) \ - FN(TCP_MD5UNEXPECTED) \ - FN(TCP_MD5FAILURE) \ - FN(SOCKET_BACKLOG) \ - FN(TCP_FLAGS) \ - FN(TCP_ZEROWINDOW) \ - FN(TCP_OLD_DATA) \ - FN(TCP_OVERWINDOW) \ - FN(TCP_OFOMERGE) \ - FN(TCP_RFC7323_PAWS) \ - FN(TCP_INVALID_SEQUENCE) \ - FN(TCP_RESET) \ - FN(TCP_INVALID_SYN) \ - FN(TCP_CLOSE) \ - FN(TCP_FASTOPEN) \ - FN(TCP_OLD_ACK) \ - FN(TCP_TOO_OLD_ACK) \ - FN(TCP_ACK_UNSENT_DATA) \ - FN(TCP_OFO_QUEUE_PRUNE) \ - FN(TCP_OFO_DROP) \ - FN(IP_OUTNOROUTES) \ - FN(BPF_CGROUP_EGRESS) \ - FN(IPV6DISABLED) \ - FN(NEIGH_CREATEFAIL) \ - FN(NEIGH_FAILED) \ - FN(NEIGH_QUEUEFULL) \ - FN(NEIGH_DEAD) \ - FN(TC_EGRESS) \ - FN(QDISC_DROP) \ - FN(CPU_BACKLOG) \ - FN(XDP) \ - FN(TC_INGRESS) \ - FN(UNHANDLED_PROTO) \ - FN(SKB_CSUM) \ - FN(SKB_GSO_SEG) \ - FN(SKB_UCOPY_FAULT) \ - FN(DEV_HDR) \ - FN(DEV_READY) \ - FN(FULL_RING) \ - FN(NOMEM) \ - FN(HDR_TRUNC) \ - FN(TAP_FILTER) \ - FN(TAP_TXFILTER) \ - FN(ICMP_CSUM) \ - FN(INVALID_PROTO) \ - FN(IP_INADDRERRORS) \ - FN(IP_INNOROUTES) \ - FN(PKT_TOO_BIG) \ - FN(DUP_FRAG) \ - FN(FRAG_REASM_TIMEOUT) \ - FN(FRAG_TOO_FAR) \ - FN(TCP_MINTTL) \ - FN(IPV6_BAD_EXTHDR) \ - FN(IPV6_NDISC_FRAG) \ - FN(IPV6_NDISC_HOP_LIMIT) \ - FN(IPV6_NDISC_BAD_CODE) \ - FN(IPV6_NDISC_BAD_OPTIONS) \ - FN(IPV6_NDISC_NS_OTHERHOST) \ - FNe(MAX) +#include <net/dropreason-core.h> /** - * enum skb_drop_reason - the reasons of skb drops - * - * The reason of skb drop, which is used in kfree_skb_reason(). + * enum skb_drop_reason_subsys - subsystem tag for (extended) drop reasons */ -enum skb_drop_reason { - /** - * @SKB_NOT_DROPPED_YET: skb is not dropped yet (used for no-drop case) - */ - SKB_NOT_DROPPED_YET = 0, - /** @SKB_CONSUMED: packet has been consumed */ - SKB_CONSUMED, - /** @SKB_DROP_REASON_NOT_SPECIFIED: drop reason is not specified */ - SKB_DROP_REASON_NOT_SPECIFIED, - /** @SKB_DROP_REASON_NO_SOCKET: socket not found */ - SKB_DROP_REASON_NO_SOCKET, - /** @SKB_DROP_REASON_PKT_TOO_SMALL: packet size is too small */ - SKB_DROP_REASON_PKT_TOO_SMALL, - /** @SKB_DROP_REASON_TCP_CSUM: TCP checksum error */ - SKB_DROP_REASON_TCP_CSUM, - /** @SKB_DROP_REASON_SOCKET_FILTER: dropped by socket filter */ - SKB_DROP_REASON_SOCKET_FILTER, - /** @SKB_DROP_REASON_UDP_CSUM: UDP checksum error */ - SKB_DROP_REASON_UDP_CSUM, - /** @SKB_DROP_REASON_NETFILTER_DROP: dropped by netfilter */ - SKB_DROP_REASON_NETFILTER_DROP, - /** - * @SKB_DROP_REASON_OTHERHOST: packet don't belong to current host - * (interface is in promisc mode) - */ - SKB_DROP_REASON_OTHERHOST, - /** @SKB_DROP_REASON_IP_CSUM: IP checksum error */ - SKB_DROP_REASON_IP_CSUM, - /** - * @SKB_DROP_REASON_IP_INHDR: there is something wrong with IP header (see - * IPSTATS_MIB_INHDRERRORS) - */ - SKB_DROP_REASON_IP_INHDR, - /** - * @SKB_DROP_REASON_IP_RPFILTER: IP rpfilter validate failed. see the - * document for rp_filter in ip-sysctl.rst for more information - */ - SKB_DROP_REASON_IP_RPFILTER, - /** - * @SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST: destination address of L2 is - * multicast, but L3 is unicast. - */ - SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST, - /** @SKB_DROP_REASON_XFRM_POLICY: xfrm policy check failed */ - SKB_DROP_REASON_XFRM_POLICY, - /** @SKB_DROP_REASON_IP_NOPROTO: no support for IP protocol */ - SKB_DROP_REASON_IP_NOPROTO, - /** @SKB_DROP_REASON_SOCKET_RCVBUFF: socket receive buff is full */ - SKB_DROP_REASON_SOCKET_RCVBUFF, - /** - * @SKB_DROP_REASON_PROTO_MEM: proto memory limition, such as udp packet - * drop out of udp_memory_allocated. - */ - SKB_DROP_REASON_PROTO_MEM, - /** - * @SKB_DROP_REASON_TCP_MD5NOTFOUND: no MD5 hash and one expected, - * corresponding to LINUX_MIB_TCPMD5NOTFOUND - */ - SKB_DROP_REASON_TCP_MD5NOTFOUND, - /** - * @SKB_DROP_REASON_TCP_MD5UNEXPECTED: MD5 hash and we're not expecting - * one, corresponding to LINUX_MIB_TCPMD5UNEXPECTED - */ - SKB_DROP_REASON_TCP_MD5UNEXPECTED, - /** - * @SKB_DROP_REASON_TCP_MD5FAILURE: MD5 hash and its wrong, corresponding - * to LINUX_MIB_TCPMD5FAILURE - */ - SKB_DROP_REASON_TCP_MD5FAILURE, - /** - * @SKB_DROP_REASON_SOCKET_BACKLOG: failed to add skb to socket backlog ( - * see LINUX_MIB_TCPBACKLOGDROP) - */ - SKB_DROP_REASON_SOCKET_BACKLOG, - /** @SKB_DROP_REASON_TCP_FLAGS: TCP flags invalid */ - SKB_DROP_REASON_TCP_FLAGS, - /** - * @SKB_DROP_REASON_TCP_ZEROWINDOW: TCP receive window size is zero, - * see LINUX_MIB_TCPZEROWINDOWDROP - */ - SKB_DROP_REASON_TCP_ZEROWINDOW, - /** - * @SKB_DROP_REASON_TCP_OLD_DATA: the TCP data reveived is already - * received before (spurious retrans may happened), see - * LINUX_MIB_DELAYEDACKLOST - */ - SKB_DROP_REASON_TCP_OLD_DATA, - /** - * @SKB_DROP_REASON_TCP_OVERWINDOW: the TCP data is out of window, - * the seq of the first byte exceed the right edges of receive - * window - */ - SKB_DROP_REASON_TCP_OVERWINDOW, - /** - * @SKB_DROP_REASON_TCP_OFOMERGE: the data of skb is already in the ofo - * queue, corresponding to LINUX_MIB_TCPOFOMERGE - */ - SKB_DROP_REASON_TCP_OFOMERGE, - /** - * @SKB_DROP_REASON_TCP_RFC7323_PAWS: PAWS check, corresponding to - * LINUX_MIB_PAWSESTABREJECTED - */ - SKB_DROP_REASON_TCP_RFC7323_PAWS, - /** @SKB_DROP_REASON_TCP_INVALID_SEQUENCE: Not acceptable SEQ field */ - SKB_DROP_REASON_TCP_INVALID_SEQUENCE, - /** @SKB_DROP_REASON_TCP_RESET: Invalid RST packet */ - SKB_DROP_REASON_TCP_RESET, - /** - * @SKB_DROP_REASON_TCP_INVALID_SYN: Incoming packet has unexpected - * SYN flag - */ - SKB_DROP_REASON_TCP_INVALID_SYN, - /** @SKB_DROP_REASON_TCP_CLOSE: TCP socket in CLOSE state */ - SKB_DROP_REASON_TCP_CLOSE, - /** @SKB_DROP_REASON_TCP_FASTOPEN: dropped by FASTOPEN request socket */ - SKB_DROP_REASON_TCP_FASTOPEN, - /** @SKB_DROP_REASON_TCP_OLD_ACK: TCP ACK is old, but in window */ - SKB_DROP_REASON_TCP_OLD_ACK, - /** @SKB_DROP_REASON_TCP_TOO_OLD_ACK: TCP ACK is too old */ - SKB_DROP_REASON_TCP_TOO_OLD_ACK, - /** - * @SKB_DROP_REASON_TCP_ACK_UNSENT_DATA: TCP ACK for data we haven't - * sent yet - */ - SKB_DROP_REASON_TCP_ACK_UNSENT_DATA, - /** @SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE: pruned from TCP OFO queue */ - SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE, - /** @SKB_DROP_REASON_TCP_OFO_DROP: data already in receive queue */ - SKB_DROP_REASON_TCP_OFO_DROP, - /** @SKB_DROP_REASON_IP_OUTNOROUTES: route lookup failed */ - SKB_DROP_REASON_IP_OUTNOROUTES, - /** - * @SKB_DROP_REASON_BPF_CGROUP_EGRESS: dropped by BPF_PROG_TYPE_CGROUP_SKB - * eBPF program - */ - SKB_DROP_REASON_BPF_CGROUP_EGRESS, - /** @SKB_DROP_REASON_IPV6DISABLED: IPv6 is disabled on the device */ - SKB_DROP_REASON_IPV6DISABLED, - /** @SKB_DROP_REASON_NEIGH_CREATEFAIL: failed to create neigh entry */ - SKB_DROP_REASON_NEIGH_CREATEFAIL, - /** @SKB_DROP_REASON_NEIGH_FAILED: neigh entry in failed state */ - SKB_DROP_REASON_NEIGH_FAILED, - /** @SKB_DROP_REASON_NEIGH_QUEUEFULL: arp_queue for neigh entry is full */ - SKB_DROP_REASON_NEIGH_QUEUEFULL, - /** @SKB_DROP_REASON_NEIGH_DEAD: neigh entry is dead */ - SKB_DROP_REASON_NEIGH_DEAD, - /** @SKB_DROP_REASON_TC_EGRESS: dropped in TC egress HOOK */ - SKB_DROP_REASON_TC_EGRESS, - /** - * @SKB_DROP_REASON_QDISC_DROP: dropped by qdisc when packet outputting ( - * failed to enqueue to current qdisc) - */ - SKB_DROP_REASON_QDISC_DROP, - /** - * @SKB_DROP_REASON_CPU_BACKLOG: failed to enqueue the skb to the per CPU - * backlog queue. This can be caused by backlog queue full (see - * netdev_max_backlog in net.rst) or RPS flow limit - */ - SKB_DROP_REASON_CPU_BACKLOG, - /** @SKB_DROP_REASON_XDP: dropped by XDP in input path */ - SKB_DROP_REASON_XDP, - /** @SKB_DROP_REASON_TC_INGRESS: dropped in TC ingress HOOK */ - SKB_DROP_REASON_TC_INGRESS, - /** @SKB_DROP_REASON_UNHANDLED_PROTO: protocol not implemented or not supported */ - SKB_DROP_REASON_UNHANDLED_PROTO, - /** @SKB_DROP_REASON_SKB_CSUM: sk_buff checksum computation error */ - SKB_DROP_REASON_SKB_CSUM, - /** @SKB_DROP_REASON_SKB_GSO_SEG: gso segmentation error */ - SKB_DROP_REASON_SKB_GSO_SEG, - /** - * @SKB_DROP_REASON_SKB_UCOPY_FAULT: failed to copy data from user space, - * e.g., via zerocopy_sg_from_iter() or skb_orphan_frags_rx() - */ - SKB_DROP_REASON_SKB_UCOPY_FAULT, - /** @SKB_DROP_REASON_DEV_HDR: device driver specific header/metadata is invalid */ - SKB_DROP_REASON_DEV_HDR, - /** - * @SKB_DROP_REASON_DEV_READY: the device is not ready to xmit/recv due to - * any of its data structure that is not up/ready/initialized, - * e.g., the IFF_UP is not set, or driver specific tun->tfiles[txq] - * is not initialized - */ - SKB_DROP_REASON_DEV_READY, - /** @SKB_DROP_REASON_FULL_RING: ring buffer is full */ - SKB_DROP_REASON_FULL_RING, - /** @SKB_DROP_REASON_NOMEM: error due to OOM */ - SKB_DROP_REASON_NOMEM, - /** - * @SKB_DROP_REASON_HDR_TRUNC: failed to trunc/extract the header from - * networking data, e.g., failed to pull the protocol header from - * frags via pskb_may_pull() - */ - SKB_DROP_REASON_HDR_TRUNC, - /** - * @SKB_DROP_REASON_TAP_FILTER: dropped by (ebpf) filter directly attached - * to tun/tap, e.g., via TUNSETFILTEREBPF - */ - SKB_DROP_REASON_TAP_FILTER, - /** - * @SKB_DROP_REASON_TAP_TXFILTER: dropped by tx filter implemented at - * tun/tap, e.g., check_filter() - */ - SKB_DROP_REASON_TAP_TXFILTER, - /** @SKB_DROP_REASON_ICMP_CSUM: ICMP checksum error */ - SKB_DROP_REASON_ICMP_CSUM, - /** - * @SKB_DROP_REASON_INVALID_PROTO: the packet doesn't follow RFC 2211, - * such as a broadcasts ICMP_TIMESTAMP - */ - SKB_DROP_REASON_INVALID_PROTO, - /** - * @SKB_DROP_REASON_IP_INADDRERRORS: host unreachable, corresponding to - * IPSTATS_MIB_INADDRERRORS - */ - SKB_DROP_REASON_IP_INADDRERRORS, - /** - * @SKB_DROP_REASON_IP_INNOROUTES: network unreachable, corresponding to - * IPSTATS_MIB_INADDRERRORS - */ - SKB_DROP_REASON_IP_INNOROUTES, - /** - * @SKB_DROP_REASON_PKT_TOO_BIG: packet size is too big (maybe exceed the - * MTU) - */ - SKB_DROP_REASON_PKT_TOO_BIG, - /** @SKB_DROP_REASON_DUP_FRAG: duplicate fragment */ - SKB_DROP_REASON_DUP_FRAG, - /** @SKB_DROP_REASON_FRAG_REASM_TIMEOUT: fragment reassembly timeout */ - SKB_DROP_REASON_FRAG_REASM_TIMEOUT, - /** - * @SKB_DROP_REASON_FRAG_TOO_FAR: ipv4 fragment too far. - * (/proc/sys/net/ipv4/ipfrag_max_dist) - */ - SKB_DROP_REASON_FRAG_TOO_FAR, +enum skb_drop_reason_subsys { + /** @SKB_DROP_REASON_SUBSYS_CORE: core drop reasons defined above */ + SKB_DROP_REASON_SUBSYS_CORE, + /** - * @SKB_DROP_REASON_TCP_MINTTL: ipv4 ttl or ipv6 hoplimit below - * the threshold (IP_MINTTL or IPV6_MINHOPCOUNT). - */ - SKB_DROP_REASON_TCP_MINTTL, - /** @SKB_DROP_REASON_IPV6_BAD_EXTHDR: Bad IPv6 extension header. */ - SKB_DROP_REASON_IPV6_BAD_EXTHDR, - /** @SKB_DROP_REASON_IPV6_NDISC_FRAG: invalid frag (suppress_frag_ndisc). */ - SKB_DROP_REASON_IPV6_NDISC_FRAG, - /** @SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT: invalid hop limit. */ - SKB_DROP_REASON_IPV6_NDISC_HOP_LIMIT, - /** @SKB_DROP_REASON_IPV6_NDISC_BAD_CODE: invalid NDISC icmp6 code. */ - SKB_DROP_REASON_IPV6_NDISC_BAD_CODE, - /** @SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS: invalid NDISC options. */ - SKB_DROP_REASON_IPV6_NDISC_BAD_OPTIONS, - /** @SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST: NEIGHBOUR SOLICITATION - * for another host. + * @SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE: mac80211 drop reasons + * for unusable frames, see net/mac80211/drop.h */ - SKB_DROP_REASON_IPV6_NDISC_NS_OTHERHOST, + SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE, + /** - * @SKB_DROP_REASON_MAX: the maximum of drop reason, which shouldn't be - * used as a real 'reason' + * @SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR: mac80211 drop reasons + * for frames still going to monitor, see net/mac80211/drop.h */ - SKB_DROP_REASON_MAX, + SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR, + + /** @SKB_DROP_REASON_SUBSYS_NUM: number of subsystems defined */ + SKB_DROP_REASON_SUBSYS_NUM +}; + +struct drop_reason_list { + const char * const *reasons; + size_t n_reasons; }; -#define SKB_DR_INIT(name, reason) \ - enum skb_drop_reason name = SKB_DROP_REASON_##reason -#define SKB_DR(name) \ - SKB_DR_INIT(name, NOT_SPECIFIED) -#define SKB_DR_SET(name, reason) \ - (name = SKB_DROP_REASON_##reason) -#define SKB_DR_OR(name, reason) \ - do { \ - if (name == SKB_DROP_REASON_NOT_SPECIFIED || \ - name == SKB_NOT_DROPPED_YET) \ - SKB_DR_SET(name, reason); \ - } while (0) +/* Note: due to dynamic registrations, access must be under RCU */ +extern const struct drop_reason_list __rcu * +drop_reasons_by_subsys[SKB_DROP_REASON_SUBSYS_NUM]; -extern const char * const drop_reasons[]; +void drop_reasons_register_subsys(enum skb_drop_reason_subsys subsys, + const struct drop_reason_list *list); +void drop_reasons_unregister_subsys(enum skb_drop_reason_subsys subsys); #endif |