On 10/13/17 2:03 PM, Cong Wang wrote: > diff --git a/include/trace/events/tcp.h b/include/trace/events/tcp.h > new file mode 100644 > index 000000000000..3d1cbd072b7e > --- /dev/null > +++ b/include/trace/events/tcp.h > @@ -0,0 +1,68 @@ > +#undef TRACE_SYSTEM > +#define TRACE_SYSTEM tcp > + > +#if !defined(_TRACE_TCP_H) || defined(TRACE_HEADER_MULTI_READ) > +#define _TRACE_TCP_H > + > +#include <linux/ipv6.h> > +#include <linux/tcp.h> > +#include <linux/tracepoint.h> > +#include <net/ipv6.h> > + > +TRACE_EVENT(tcp_retransmit_skb, > + > + TP_PROTO(struct sock *sk, struct sk_buff *skb), > + > + TP_ARGS(sk, skb), > + > + TP_STRUCT__entry( > + __field(void *, skbaddr) > + __field(void *, skaddr) > + __field(__u16, sport) > + __field(__u16, dport) > + __array(__u8, saddr, 4) > + __array(__u8, daddr, 4) > + __array(__u8, saddr_v6, 16) > + __array(__u8, daddr_v6, 16) > + ), > + > + TP_fast_assign( > + struct ipv6_pinfo *np = inet6_sk(sk); > + struct inet_sock *inet = inet_sk(sk); > + struct in6_addr *pin6; > + __be32 *p32; > + > + __entry->skbaddr = skb; > + __entry->skaddr = sk; > + > + __entry->sport = ntohs(inet->inet_sport); > + __entry->dport = ntohs(inet->inet_dport); > + > + p32 = (__be32 *) __entry->saddr; > + *p32 = inet->inet_saddr; > + > + p32 = (__be32 *) __entry->daddr; > + *p32 = inet->inet_daddr; > + > + if (np) { > + pin6 = (struct in6_addr *)__entry->saddr_v6; > + *pin6 = np->saddr; > + pin6 = (struct in6_addr *)__entry->daddr_v6; > + *pin6 = *(np->daddr_cache); > + } else { > + pin6 = (struct in6_addr *)__entry->saddr_v6; > + ipv6_addr_set_v4mapped(inet->inet_saddr, pin6); > + pin6 = (struct in6_addr *)__entry->daddr_v6; > + ipv6_addr_set_v4mapped(inet->inet_daddr, pin6); > + } > + ), > + > + TP_printk("sport=%hu dport=%hu saddr=%pI4 daddr=%pI4 saddrv6=%pI6 > daddrv6=%pI6",
%pI6c is more user friendly for IPv6 addresses.