@@ -337,169 +337,295 @@ struct sk_buff_head {
struct sk_buff;
+/*
+ * SKB_DROP_REASON_NOT_SPECIFIED
+ * drop reason is not specified
+ *
+ * SKB_DROP_REASON_NO_SOCKET
+ * socket not found
+ *
+ * SKB_DROP_REASON_PKT_TOO_SMALL
+ * packet size is too small
+ *
+ * SKB_DROP_REASON_TCP_CSUM
+ * TCP checksum error
+ *
+ * SKB_DROP_REASON_SOCKET_FILTER
+ * dropped by socket filter
+ *
+ * SKB_DROP_REASON_UDP_CSUM
+ * UDP checksum error
+ *
+ * SKB_DROP_REASON_NETFILTER_DROP
+ * dropped by netfilter
+ *
+ * SKB_DROP_REASON_OTHERHOST
+ * packet don't belong to current host (interface is in promisc
+ * mode)
+ *
+ * SKB_DROP_REASON_IP_CSUM
+ * IP checksum error
+ *
+ * SKB_DROP_REASON_IP_INHDR
+ * there is something wrong with IP header (see
+ * IPSTATS_MIB_INHDRERRORS)
+ *
+ * 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_UNICAST_IN_L2_MULTICAST
+ * destination address of L2 is multicast, but L3 is unicast.
+ *
+ * SKB_DROP_REASON_XFRM_POLICY
+ * xfrm policy check failed
+ *
+ * SKB_DROP_REASON_IP_NOPROTO
+ * no support for IP protocol
+ *
+ * SKB_DROP_REASON_SOCKET_RCVBUFF
+ * socket receive buff is full
+ *
+ * SKB_DROP_REASON_PROTO_MEM
+ * proto memory limition, such as udp packet drop out of
+ * udp_memory_allocated.
+ *
+ * SKB_DROP_REASON_TCP_MD5NOTFOUND
+ * no MD5 hash and one expected, corresponding to
+ * LINUX_MIB_TCPMD5NOTFOUND
+ *
+ * SKB_DROP_REASON_TCP_MD5UNEXPECTED
+ * MD5 hash and we're not expecting one, corresponding to
+ * LINUX_MIB_TCPMD5UNEXPECTED
+ *
+ * SKB_DROP_REASON_TCP_MD5FAILURE
+ * MD5 hash and its wrong, corresponding to LINUX_MIB_TCPMD5FAILURE
+ *
+ * SKB_DROP_REASON_SOCKET_BACKLOG
+ * failed to add skb to socket backlog (see LINUX_MIB_TCPBACKLOGDROP)
+ *
+ * SKB_DROP_REASON_TCP_FLAGS
+ * TCP flags invalid
+ *
+ * SKB_DROP_REASON_TCP_ZEROWINDOW
+ * TCP receive window size is zero, see LINUX_MIB_TCPZEROWINDOWDROP
+ *
+ * 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_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_OFOMERGE
+ * the data of skb is already in the ofo queue, corresponding to
+ * LINUX_MIB_TCPOFOMERGE
+ *
+ * SKB_DROP_REASON_TCP_RFC7323_PAWS
+ * PAWS check, corresponding to LINUX_MIB_PAWSESTABREJECTED
+ *
+ * SKB_DROP_REASON_TCP_INVALID_SEQUENCE
+ * Not acceptable SEQ field
+ *
+ * SKB_DROP_REASON_TCP_RESET
+ * Invalid RST packet
+ *
+ * SKB_DROP_REASON_TCP_INVALID_SYN
+ * Incoming packet has unexpected SYN flag
+ *
+ * SKB_DROP_REASON_TCP_CLOSE
+ * TCP socket in CLOSE state
+ *
+ * SKB_DROP_REASON_TCP_FASTOPEN
+ * dropped by FASTOPEN request socket
+ *
+ * SKB_DROP_REASON_TCP_OLD_ACK
+ * TCP ACK is old, but in window
+ *
+ * SKB_DROP_REASON_TCP_TOO_OLD_ACK
+ * TCP ACK is too old
+ *
+ * SKB_DROP_REASON_TCP_ACK_UNSENT_DATA
+ * TCP ACK for data we haven't sent yet
+ *
+ * SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE
+ * pruned from TCP OFO queue
+ *
+ * SKB_DROP_REASON_TCP_OFO_DROP
+ * data already in receive queue
+ *
+ * SKB_DROP_REASON_IP_OUTNOROUTES
+ * route lookup failed
+ *
+ * SKB_DROP_REASON_BPF_CGROUP_EGRESS
+ * dropped by BPF_PROG_TYPE_CGROUP_SKB eBPF program
+ *
+ * SKB_DROP_REASON_IPV6DISABLED
+ * IPv6 is disabled on the device
+ *
+ * SKB_DROP_REASON_NEIGH_CREATEFAIL
+ * failed to create neigh entry
+ *
+ * SKB_DROP_REASON_NEIGH_FAILED
+ * neigh entry in failed state
+ *
+ * SKB_DROP_REASON_NEIGH_QUEUEFULL
+ * arp_queue for neigh entry is full
+ *
+ * SKB_DROP_REASON_NEIGH_DEAD
+ * neigh entry is dead
+ *
+ * SKB_DROP_REASON_TC_EGRESS
+ * dropped in TC egress HOOK
+ *
+ * SKB_DROP_REASON_QDISC_DROP
+ * dropped by qdisc when packet outputting (failed to enqueue to
+ * current qdisc)
+ *
+ * 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_XDP
+ * dropped by XDP in input path
+ *
+ * SKB_DROP_REASON_TC_INGRESS
+ * dropped in TC ingress HOOK
+ *
+ * SKB_DROP_REASON_UNHANDLED_PROTO
+ * protocol not implemented or not supported
+ *
+ * SKB_DROP_REASON_SKB_CSUM
+ * sk_buff checksum computation error
+ *
+ * SKB_DROP_REASON_SKB_GSO_SEG
+ * gso segmentation error
+ *
+ * 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_DEV_HDR
+ * device driver specific header/metadata is invalid
+ *
+ * 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_FULL_RING
+ * ring buffer is full
+ *
+ * SKB_DROP_REASON_NOMEM
+ * error due to OOM
+ *
+ * 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_TAP_FILTER
+ * dropped by (ebpf) filter directly attached to tun/tap, e.g., via
+ * TUNSETFILTEREBPF
+ *
+ * SKB_DROP_REASON_TAP_TXFILTER
+ * dropped by tx filter implemented at tun/tap, e.g., check_filter()
+ *
+ * SKB_DROP_REASON_ICMP_CSUM
+ * ICMP checksum error
+ *
+ * SKB_DROP_REASON_INVALID_PROTO
+ * the packet doesn't follow RFC 2211, such as a broadcasts
+ * ICMP_TIMESTAMP
+ *
+ * SKB_DROP_REASON_IP_INADDRERRORS
+ * host unreachable, corresponding to IPSTATS_MIB_INADDRERRORS
+ *
+ * SKB_DROP_REASON_IP_INNOROUTES
+ * network unreachable, corresponding to IPSTATS_MIB_INADDRERRORS
+ *
+ * SKB_DROP_REASON_PKT_TOO_BIG
+ * packet size is too big (maybe exceed the MTU)
+ */
+#define __DEFINE_SKB_DROP_REASON(FN) \
+ 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(MAX)
+
/* The reason of skb drop, which is used in kfree_skb_reason().
* en...maybe they should be splited by group?
- *
- * Each item here should also be in 'TRACE_SKB_DROP_REASON', which is
- * used to translate the reason to string.
*/
enum skb_drop_reason {
SKB_NOT_DROPPED_YET = 0,
- SKB_DROP_REASON_NOT_SPECIFIED, /* drop reason is not specified */
- SKB_DROP_REASON_NO_SOCKET, /* socket not found */
- SKB_DROP_REASON_PKT_TOO_SMALL, /* packet size is too small */
- SKB_DROP_REASON_TCP_CSUM, /* TCP checksum error */
- SKB_DROP_REASON_SOCKET_FILTER, /* dropped by socket filter */
- SKB_DROP_REASON_UDP_CSUM, /* UDP checksum error */
- SKB_DROP_REASON_NETFILTER_DROP, /* dropped by netfilter */
- SKB_DROP_REASON_OTHERHOST, /* packet don't belong to current
- * host (interface is in promisc
- * mode)
- */
- SKB_DROP_REASON_IP_CSUM, /* IP checksum error */
- SKB_DROP_REASON_IP_INHDR, /* there is something wrong with
- * IP header (see
- * IPSTATS_MIB_INHDRERRORS)
- */
- 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_UNICAST_IN_L2_MULTICAST, /* destination address of L2
- * is multicast, but L3 is
- * unicast.
- */
- SKB_DROP_REASON_XFRM_POLICY, /* xfrm policy check failed */
- SKB_DROP_REASON_IP_NOPROTO, /* no support for IP protocol */
- SKB_DROP_REASON_SOCKET_RCVBUFF, /* socket receive buff is full */
- SKB_DROP_REASON_PROTO_MEM, /* proto memory limition, such as
- * udp packet drop out of
- * udp_memory_allocated.
- */
- SKB_DROP_REASON_TCP_MD5NOTFOUND, /* no MD5 hash and one
- * expected, corresponding
- * to LINUX_MIB_TCPMD5NOTFOUND
- */
- SKB_DROP_REASON_TCP_MD5UNEXPECTED, /* MD5 hash and we're not
- * expecting one, corresponding
- * to LINUX_MIB_TCPMD5UNEXPECTED
- */
- SKB_DROP_REASON_TCP_MD5FAILURE, /* MD5 hash and its wrong,
- * corresponding to
- * LINUX_MIB_TCPMD5FAILURE
- */
- SKB_DROP_REASON_SOCKET_BACKLOG, /* failed to add skb to socket
- * backlog (see
- * LINUX_MIB_TCPBACKLOGDROP)
- */
- SKB_DROP_REASON_TCP_FLAGS, /* TCP flags invalid */
- SKB_DROP_REASON_TCP_ZEROWINDOW, /* TCP receive window size is zero,
- * see LINUX_MIB_TCPZEROWINDOWDROP
- */
- 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_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_OFOMERGE, /* the data of skb is already in
- * the ofo queue, corresponding to
- * LINUX_MIB_TCPOFOMERGE
- */
- SKB_DROP_REASON_TCP_RFC7323_PAWS, /* PAWS check, corresponding to
- * LINUX_MIB_PAWSESTABREJECTED
- */
- SKB_DROP_REASON_TCP_INVALID_SEQUENCE, /* Not acceptable SEQ field */
- SKB_DROP_REASON_TCP_RESET, /* Invalid RST packet */
- SKB_DROP_REASON_TCP_INVALID_SYN, /* Incoming packet has unexpected SYN flag */
- SKB_DROP_REASON_TCP_CLOSE, /* TCP socket in CLOSE state */
- SKB_DROP_REASON_TCP_FASTOPEN, /* dropped by FASTOPEN request socket */
- SKB_DROP_REASON_TCP_OLD_ACK, /* TCP ACK is old, but in window */
- SKB_DROP_REASON_TCP_TOO_OLD_ACK, /* TCP ACK is too old */
- SKB_DROP_REASON_TCP_ACK_UNSENT_DATA, /* TCP ACK for data we haven't sent yet */
- SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE, /* pruned from TCP OFO queue */
- SKB_DROP_REASON_TCP_OFO_DROP, /* data already in receive queue */
- SKB_DROP_REASON_IP_OUTNOROUTES, /* route lookup failed */
- SKB_DROP_REASON_BPF_CGROUP_EGRESS, /* dropped by
- * BPF_PROG_TYPE_CGROUP_SKB
- * eBPF program
- */
- SKB_DROP_REASON_IPV6DISABLED, /* IPv6 is disabled on the device */
- SKB_DROP_REASON_NEIGH_CREATEFAIL, /* failed to create neigh
- * entry
- */
- SKB_DROP_REASON_NEIGH_FAILED, /* neigh entry in failed state */
- SKB_DROP_REASON_NEIGH_QUEUEFULL, /* arp_queue for neigh
- * entry is full
- */
- SKB_DROP_REASON_NEIGH_DEAD, /* neigh entry is dead */
- SKB_DROP_REASON_TC_EGRESS, /* dropped in TC egress HOOK */
- SKB_DROP_REASON_QDISC_DROP, /* dropped by qdisc when packet
- * outputting (failed to enqueue to
- * current qdisc)
- */
- 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_XDP, /* dropped by XDP in input path */
- SKB_DROP_REASON_TC_INGRESS, /* dropped in TC ingress HOOK */
- SKB_DROP_REASON_UNHANDLED_PROTO, /* protocol not implemented
- * or not supported
- */
- SKB_DROP_REASON_SKB_CSUM, /* sk_buff checksum computation
- * error
- */
- SKB_DROP_REASON_SKB_GSO_SEG, /* gso segmentation error */
- 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_DEV_HDR, /* device driver specific
- * header/metadata is invalid
- */
- /* 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_NOMEM, /* error due to OOM */
- 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_TAP_FILTER, /* dropped by (ebpf) filter directly
- * attached to tun/tap, e.g., via
- * TUNSETFILTEREBPF
- */
- SKB_DROP_REASON_TAP_TXFILTER, /* dropped by tx filter implemented
- * at tun/tap, e.g., check_filter()
- */
- SKB_DROP_REASON_ICMP_CSUM, /* ICMP checksum error */
- SKB_DROP_REASON_INVALID_PROTO, /* the packet doesn't follow RFC
- * 2211, such as a broadcasts
- * ICMP_TIMESTAMP
- */
- SKB_DROP_REASON_IP_INADDRERRORS, /* host unreachable, corresponding
- * to IPSTATS_MIB_INADDRERRORS
- */
- SKB_DROP_REASON_IP_INNOROUTES, /* network unreachable, corresponding
- * to IPSTATS_MIB_INADDRERRORS
- */
- SKB_DROP_REASON_PKT_TOO_BIG, /* packet size is too big (maybe exceed
- * the MTU)
- */
- SKB_DROP_REASON_MAX,
+
+#undef FN
+#define FN(name) SKB_DROP_REASON_##name,
+ __DEFINE_SKB_DROP_REASON(FN)
+#undef FN
};
#define SKB_DR_INIT(name, reason) \
@@ -515,6 +641,8 @@ enum skb_drop_reason {
SKB_DR_SET(name, reason); \
} while (0)
+extern const char * const drop_reasons[];
+
/* To allow 64K frame to be packed as single skb without frag_list we
* require 64K/PAGE_SIZE pages plus 1 additional page to allow for
* buffers which do not start on a page boundary.
@@ -9,92 +9,6 @@
#include <linux/netdevice.h>
#include <linux/tracepoint.h>
-#define TRACE_SKB_DROP_REASON \
- EM(SKB_DROP_REASON_NOT_SPECIFIED, NOT_SPECIFIED) \
- EM(SKB_DROP_REASON_NO_SOCKET, NO_SOCKET) \
- EM(SKB_DROP_REASON_PKT_TOO_SMALL, PKT_TOO_SMALL) \
- EM(SKB_DROP_REASON_TCP_CSUM, TCP_CSUM) \
- EM(SKB_DROP_REASON_SOCKET_FILTER, SOCKET_FILTER) \
- EM(SKB_DROP_REASON_UDP_CSUM, UDP_CSUM) \
- EM(SKB_DROP_REASON_NETFILTER_DROP, NETFILTER_DROP) \
- EM(SKB_DROP_REASON_OTHERHOST, OTHERHOST) \
- EM(SKB_DROP_REASON_IP_CSUM, IP_CSUM) \
- EM(SKB_DROP_REASON_IP_INHDR, IP_INHDR) \
- EM(SKB_DROP_REASON_IP_RPFILTER, IP_RPFILTER) \
- EM(SKB_DROP_REASON_UNICAST_IN_L2_MULTICAST, \
- UNICAST_IN_L2_MULTICAST) \
- EM(SKB_DROP_REASON_XFRM_POLICY, XFRM_POLICY) \
- EM(SKB_DROP_REASON_IP_NOPROTO, IP_NOPROTO) \
- EM(SKB_DROP_REASON_SOCKET_RCVBUFF, SOCKET_RCVBUFF) \
- EM(SKB_DROP_REASON_PROTO_MEM, PROTO_MEM) \
- EM(SKB_DROP_REASON_TCP_MD5NOTFOUND, TCP_MD5NOTFOUND) \
- EM(SKB_DROP_REASON_TCP_MD5UNEXPECTED, \
- TCP_MD5UNEXPECTED) \
- EM(SKB_DROP_REASON_TCP_MD5FAILURE, TCP_MD5FAILURE) \
- EM(SKB_DROP_REASON_SOCKET_BACKLOG, SOCKET_BACKLOG) \
- EM(SKB_DROP_REASON_TCP_FLAGS, TCP_FLAGS) \
- EM(SKB_DROP_REASON_TCP_ZEROWINDOW, TCP_ZEROWINDOW) \
- EM(SKB_DROP_REASON_TCP_OLD_DATA, TCP_OLD_DATA) \
- EM(SKB_DROP_REASON_TCP_OVERWINDOW, TCP_OVERWINDOW) \
- EM(SKB_DROP_REASON_TCP_OFOMERGE, TCP_OFOMERGE) \
- EM(SKB_DROP_REASON_TCP_OFO_DROP, TCP_OFO_DROP) \
- EM(SKB_DROP_REASON_TCP_RFC7323_PAWS, TCP_RFC7323_PAWS) \
- EM(SKB_DROP_REASON_TCP_INVALID_SEQUENCE, \
- TCP_INVALID_SEQUENCE) \
- EM(SKB_DROP_REASON_TCP_RESET, TCP_RESET) \
- EM(SKB_DROP_REASON_TCP_INVALID_SYN, TCP_INVALID_SYN) \
- EM(SKB_DROP_REASON_TCP_CLOSE, TCP_CLOSE) \
- EM(SKB_DROP_REASON_TCP_FASTOPEN, TCP_FASTOPEN) \
- EM(SKB_DROP_REASON_TCP_OLD_ACK, TCP_OLD_ACK) \
- EM(SKB_DROP_REASON_TCP_TOO_OLD_ACK, TCP_TOO_OLD_ACK) \
- EM(SKB_DROP_REASON_TCP_ACK_UNSENT_DATA, \
- TCP_ACK_UNSENT_DATA) \
- EM(SKB_DROP_REASON_TCP_OFO_QUEUE_PRUNE, \
- TCP_OFO_QUEUE_PRUNE) \
- EM(SKB_DROP_REASON_IP_OUTNOROUTES, IP_OUTNOROUTES) \
- EM(SKB_DROP_REASON_BPF_CGROUP_EGRESS, \
- BPF_CGROUP_EGRESS) \
- EM(SKB_DROP_REASON_IPV6DISABLED, IPV6DISABLED) \
- EM(SKB_DROP_REASON_NEIGH_CREATEFAIL, NEIGH_CREATEFAIL) \
- EM(SKB_DROP_REASON_NEIGH_FAILED, NEIGH_FAILED) \
- EM(SKB_DROP_REASON_NEIGH_QUEUEFULL, NEIGH_QUEUEFULL) \
- EM(SKB_DROP_REASON_NEIGH_DEAD, NEIGH_DEAD) \
- EM(SKB_DROP_REASON_TC_EGRESS, TC_EGRESS) \
- EM(SKB_DROP_REASON_QDISC_DROP, QDISC_DROP) \
- EM(SKB_DROP_REASON_CPU_BACKLOG, CPU_BACKLOG) \
- EM(SKB_DROP_REASON_XDP, XDP) \
- EM(SKB_DROP_REASON_TC_INGRESS, TC_INGRESS) \
- EM(SKB_DROP_REASON_UNHANDLED_PROTO, UNHANDLED_PROTO) \
- EM(SKB_DROP_REASON_SKB_CSUM, SKB_CSUM) \
- EM(SKB_DROP_REASON_SKB_GSO_SEG, SKB_GSO_SEG) \
- EM(SKB_DROP_REASON_SKB_UCOPY_FAULT, SKB_UCOPY_FAULT) \
- EM(SKB_DROP_REASON_DEV_HDR, DEV_HDR) \
- EM(SKB_DROP_REASON_DEV_READY, DEV_READY) \
- EM(SKB_DROP_REASON_FULL_RING, FULL_RING) \
- EM(SKB_DROP_REASON_NOMEM, NOMEM) \
- EM(SKB_DROP_REASON_HDR_TRUNC, HDR_TRUNC) \
- EM(SKB_DROP_REASON_TAP_FILTER, TAP_FILTER) \
- EM(SKB_DROP_REASON_TAP_TXFILTER, TAP_TXFILTER) \
- EM(SKB_DROP_REASON_ICMP_CSUM, ICMP_CSUM) \
- EM(SKB_DROP_REASON_INVALID_PROTO, INVALID_PROTO) \
- EM(SKB_DROP_REASON_IP_INADDRERRORS, IP_INADDRERRORS) \
- EM(SKB_DROP_REASON_IP_INNOROUTES, IP_INNOROUTES) \
- EM(SKB_DROP_REASON_PKT_TOO_BIG, PKT_TOO_BIG) \
- EMe(SKB_DROP_REASON_MAX, MAX)
-
-#undef EM
-#undef EMe
-
-#define EM(a, b) TRACE_DEFINE_ENUM(a);
-#define EMe(a, b) TRACE_DEFINE_ENUM(a);
-
-TRACE_SKB_DROP_REASON
-
-#undef EM
-#undef EMe
-#define EM(a, b) { a, #b },
-#define EMe(a, b) { a, #b }
-
/*
* Tracepoint for free an sk_buff:
*/
@@ -121,8 +35,7 @@ TRACE_EVENT(kfree_skb,
TP_printk("skbaddr=%p protocol=%u location=%p reason: %s",
__entry->skbaddr, __entry->protocol, __entry->location,
- __print_symbolic(__entry->reason,
- TRACE_SKB_DROP_REASON))
+ drop_reasons[__entry->reason])
);
TRACE_EVENT(consume_skb,
@@ -48,19 +48,6 @@
static int trace_state = TRACE_OFF;
static bool monitor_hw;
-#undef EM
-#undef EMe
-
-#define EM(a, b) [a] = #b,
-#define EMe(a, b) [a] = #b
-
-/* drop_reasons is used to translate 'enum skb_drop_reason' to string,
- * which is reported to user space.
- */
-static const char * const drop_reasons[] = {
- TRACE_SKB_DROP_REASON
-};
-
/* net_dm_mutex
*
* An overall lock guarding every operation coming from userspace.
@@ -90,6 +90,16 @@ static struct kmem_cache *skbuff_ext_cache __ro_after_init;
int sysctl_max_skb_frags __read_mostly = MAX_SKB_FRAGS;
EXPORT_SYMBOL(sysctl_max_skb_frags);
+/* drop_reasons is used to translate 'enum skb_drop_reason' to string,
+ * which is reported to user space.
+ */
+const char * const drop_reasons[] = {
+#undef FN
+#define FN(name) [SKB_DROP_REASON_##name] = #name,
+ __DEFINE_SKB_DROP_REASON(FN)
+#undef FN
+};
+
/**
* skb_panic - private function for out-of-line support
* @skb: buffer