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net: sock: add trace for socket errors

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This patch will add tracers to trace inet socket errors only. A user
space monitor application can track connection errors indepedent from
socket lifetime and do additional handling. For example a cluster
manager can fence a node if errors occurs in a specific heuristic.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Aring 2021-06-27 18:48:22 -04:00 • committed by David S. Miller
parent e3ae2365ef
commit e6a3e44340
2 changed files with 70 additions and 0 deletions
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60
include/trace/events/sock.h
View file

@ -201,6 +201,66 @@ TRACE_EVENT(inet_sock_set_state,
show_tcp_state_name(__entry->newstate)) show_tcp_state_name(__entry->newstate))
); );
TRACE_EVENT(inet_sk_error_report,
TP_PROTO(const struct sock *sk),
TP_ARGS(sk),
TP_STRUCT__entry(
__field(int, error)
__field(__u16, sport)
__field(__u16, dport)
__field(__u16, family)
__field(__u16, protocol)
__array(__u8, saddr, 4)
__array(__u8, daddr, 4)
__array(__u8, saddr_v6, 16)
__array(__u8, daddr_v6, 16)
),
TP_fast_assign(
struct inet_sock *inet = inet_sk(sk);
struct in6_addr *pin6;
__be32 *p32;
__entry->error = sk->sk_err;
__entry->family = sk->sk_family;
__entry->protocol = sk->sk_protocol;
__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 IS_ENABLED(CONFIG_IPV6)
if (sk->sk_family == AF_INET6) {
pin6 = (struct in6_addr *)__entry->saddr_v6;
*pin6 = sk->sk_v6_rcv_saddr;
pin6 = (struct in6_addr *)__entry->daddr_v6;
*pin6 = sk->sk_v6_daddr;
} else
#endif
{
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("family=%s protocol=%s sport=%hu dport=%hu saddr=%pI4 daddr=%pI4 saddrv6=%pI6c daddrv6=%pI6c error=%d",
show_family_name(__entry->family),
show_inet_protocol_name(__entry->protocol),
__entry->sport, __entry->dport,
__entry->saddr, __entry->daddr,
__entry->saddr_v6, __entry->daddr_v6,
__entry->error)
);
#endif /* _TRACE_SOCK_H */ #endif /* _TRACE_SOCK_H */
/* This part must be outside protection */ /* This part must be outside protection */

10
net/core/sock.c
View file

@ -334,6 +334,16 @@ EXPORT_SYMBOL(__sk_backlog_rcv);
void sk_error_report(struct sock *sk) void sk_error_report(struct sock *sk)
{ {
sk->sk_error_report(sk); sk->sk_error_report(sk);
switch (sk->sk_family) {
case AF_INET:
fallthrough;
case AF_INET6:
trace_inet_sk_error_report(sk);
break;
default:
break;
}
} }
EXPORT_SYMBOL(sk_error_report); EXPORT_SYMBOL(sk_error_report);