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linux/include/trace/events/tcp.h
Steven Rostedt (VMware) d7b850a7de tcp: Export to userspace the TCP state names for the trace events 
The TCP trace events (specifically tcp_set_state), maps emums to symbol
names via __print_symbolic(). But this only works for reading trace events
from the tracefs trace files. If perf or trace-cmd were to record these
events, the event format file does not convert the enum names into numbers,
and you get something like:

__print_symbolic(REC->oldstate,
    { TCP_ESTABLISHED, "TCP_ESTABLISHED" },
    { TCP_SYN_SENT, "TCP_SYN_SENT" },
    { TCP_SYN_RECV, "TCP_SYN_RECV" },
    { TCP_FIN_WAIT1, "TCP_FIN_WAIT1" },
    { TCP_FIN_WAIT2, "TCP_FIN_WAIT2" },
    { TCP_TIME_WAIT, "TCP_TIME_WAIT" },
    { TCP_CLOSE, "TCP_CLOSE" },
    { TCP_CLOSE_WAIT, "TCP_CLOSE_WAIT" },
    { TCP_LAST_ACK, "TCP_LAST_ACK" },
    { TCP_LISTEN, "TCP_LISTEN" },
    { TCP_CLOSING, "TCP_CLOSING" },
    { TCP_NEW_SYN_RECV, "TCP_NEW_SYN_RECV" })

Where trace-cmd and perf do not know the values of those enums.

Use the TRACE_DEFINE_ENUM() macros that will have the trace events convert
the enum strings into their values at system boot. This will allow perf and
trace-cmd to see actual numbers and not enums:

__print_symbolic(REC->oldstate,
    { 1, "TCP_ESTABLISHED" },
    { 2, "TCP_SYN_SENT" },
    { 3, "TCP_SYN_RECV" },
    { 4, "TCP_FIN_WAIT1" },
    { 5, "TCP_FIN_WAIT2" },
    { 6, "TCP_TIME_WAIT" },
    { 7, "TCP_CLOSE" },
    { 8, "TCP_CLOSE_WAIT" },
    { 9, "TCP_LAST_ACK" },
    { 10, "TCP_LISTEN" },
    { 11, "TCP_CLOSING" },
    { 12, "TCP_NEW_SYN_RECV" })

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-12-20 14:00:24 -05:00

315 lines
7.4 KiB
C
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#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>
#define tcp_state_names \
EM(TCP_ESTABLISHED) \
EM(TCP_SYN_SENT) \
EM(TCP_SYN_RECV) \
EM(TCP_FIN_WAIT1) \
EM(TCP_FIN_WAIT2) \
EM(TCP_TIME_WAIT) \
EM(TCP_CLOSE) \
EM(TCP_CLOSE_WAIT) \
EM(TCP_LAST_ACK) \
EM(TCP_LISTEN) \
EM(TCP_CLOSING) \
EMe(TCP_NEW_SYN_RECV) \
/* enums need to be exported to user space */
#undef EM
#undef EMe
#define EM(a) TRACE_DEFINE_ENUM(a);
#define EMe(a) TRACE_DEFINE_ENUM(a);
tcp_state_names
#undef EM
#undef EMe
#define EM(a) tcp_state_name(a),
#define EMe(a) tcp_state_name(a)
#define tcp_state_name(state) { state, #state }
#define show_tcp_state_name(val) \
__print_symbolic(val, tcp_state_names)
/*
* tcp event with arguments sk and skb
*
* Note: this class requires a valid sk pointer; while skb pointer could
* be NULL.
*/
DECLARE_EVENT_CLASS(tcp_event_sk_skb,
TP_PROTO(const struct sock *sk, const struct sk_buff *skb),
TP_ARGS(sk, skb),
TP_STRUCT__entry(
__field(const void *, skbaddr)
__field(const 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 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 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("sport=%hu dport=%hu saddr=%pI4 daddr=%pI4 saddrv6=%pI6c daddrv6=%pI6c",
__entry->sport, __entry->dport, __entry->saddr, __entry->daddr,
__entry->saddr_v6, __entry->daddr_v6)
);
DEFINE_EVENT(tcp_event_sk_skb, tcp_retransmit_skb,
TP_PROTO(const struct sock *sk, const struct sk_buff *skb),
TP_ARGS(sk, skb)
);
/*
* skb of trace_tcp_send_reset is the skb that caused RST. In case of
* active reset, skb should be NULL
*/
DEFINE_EVENT(tcp_event_sk_skb, tcp_send_reset,
TP_PROTO(const struct sock *sk, const struct sk_buff *skb),
TP_ARGS(sk, skb)
);
/*
* tcp event with arguments sk
*
* Note: this class requires a valid sk pointer.
*/
DECLARE_EVENT_CLASS(tcp_event_sk,
TP_PROTO(const struct sock *sk),
TP_ARGS(sk),
TP_STRUCT__entry(
__field(const 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 inet_sock *inet = inet_sk(sk);
struct in6_addr *pin6;
__be32 *p32;
__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 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("sport=%hu dport=%hu saddr=%pI4 daddr=%pI4 saddrv6=%pI6c daddrv6=%pI6c",
__entry->sport, __entry->dport,
__entry->saddr, __entry->daddr,
__entry->saddr_v6, __entry->daddr_v6)
);
DEFINE_EVENT(tcp_event_sk, tcp_receive_reset,
TP_PROTO(const struct sock *sk),
TP_ARGS(sk)
);
DEFINE_EVENT(tcp_event_sk, tcp_destroy_sock,
TP_PROTO(const struct sock *sk),
TP_ARGS(sk)
);
TRACE_EVENT(tcp_set_state,
TP_PROTO(const struct sock *sk, const int oldstate, const int newstate),
TP_ARGS(sk, oldstate, newstate),
TP_STRUCT__entry(
__field(const void *, skaddr)
__field(int, oldstate)
__field(int, newstate)
__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 inet_sock *inet = inet_sk(sk);
struct in6_addr *pin6;
__be32 *p32;
__entry->skaddr = sk;
__entry->oldstate = oldstate;
__entry->newstate = newstate;
__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("sport=%hu dport=%hu saddr=%pI4 daddr=%pI4 saddrv6=%pI6c daddrv6=%pI6c oldstate=%s newstate=%s",
__entry->sport, __entry->dport,
__entry->saddr, __entry->daddr,
__entry->saddr_v6, __entry->daddr_v6,
show_tcp_state_name(__entry->oldstate),
show_tcp_state_name(__entry->newstate))
);
TRACE_EVENT(tcp_retransmit_synack,
TP_PROTO(const struct sock *sk, const struct request_sock *req),
TP_ARGS(sk, req),
TP_STRUCT__entry(
__field(const void *, skaddr)
__field(const void *, req)
__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 inet_request_sock *ireq = inet_rsk(req);
struct in6_addr *pin6;
__be32 *p32;
__entry->skaddr = sk;
__entry->req = req;
__entry->sport = ireq->ir_num;
__entry->dport = ntohs(ireq->ir_rmt_port);
p32 = (__be32 *) __entry->saddr;
*p32 = ireq->ir_loc_addr;
p32 = (__be32 *) __entry->daddr;
*p32 = ireq->ir_rmt_addr;
#if IS_ENABLED(CONFIG_IPV6)
if (sk->sk_family == AF_INET6) {
pin6 = (struct in6_addr *)__entry->saddr_v6;
*pin6 = ireq->ir_v6_loc_addr;
pin6 = (struct in6_addr *)__entry->daddr_v6;
*pin6 = ireq->ir_v6_rmt_addr;
} else
#endif
{
pin6 = (struct in6_addr *)__entry->saddr_v6;
ipv6_addr_set_v4mapped(ireq->ir_loc_addr, pin6);
pin6 = (struct in6_addr *)__entry->daddr_v6;
ipv6_addr_set_v4mapped(ireq->ir_rmt_addr, pin6);
}
),
TP_printk("sport=%hu dport=%hu saddr=%pI4 daddr=%pI4 saddrv6=%pI6c daddrv6=%pI6c",
__entry->sport, __entry->dport,
__entry->saddr, __entry->daddr,
__entry->saddr_v6, __entry->daddr_v6)
);
#endif /* _TRACE_TCP_H */
/* This part must be outside protection */
#include <trace/define_trace.h>
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