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linux/include/trace/events/tcp.h
Yafang Shao 3d97d88e80 tcp: minor optimization around tcp_hdr() usage in receive path 
This is additional to the
commit ea1627c20c ("tcp: minor optimizations around tcp_hdr() usage").
At this point, skb->data is same with tcp_hdr() as tcp header has not
been pulled yet. So use the less expensive one to get the tcp header.

Remove the third parameter of tcp_rcv_established() and put it into
the function body.

Furthermore, the local variables are listed as a reverse christmas tree :)

Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-31 13:20:47 -04:00

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/* SPDX-License-Identifier: GPL-2.0 */
#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>
#include <net/tcp.h>
#include <linux/sock_diag.h>
#define TP_STORE_V4MAPPED(__entry, saddr, daddr) \
do { \
struct in6_addr *pin6; \
\
pin6 = (struct in6_addr *)__entry->saddr_v6; \
ipv6_addr_set_v4mapped(saddr, pin6); \
pin6 = (struct in6_addr *)__entry->daddr_v6; \
ipv6_addr_set_v4mapped(daddr, pin6); \
} while (0)
#if IS_ENABLED(CONFIG_IPV6)
#define TP_STORE_ADDRS(__entry, saddr, daddr, saddr6, daddr6) \
do { \
if (sk->sk_family == AF_INET6) { \
struct in6_addr *pin6; \
\
pin6 = (struct in6_addr *)__entry->saddr_v6; \
*pin6 = saddr6; \
pin6 = (struct in6_addr *)__entry->daddr_v6; \
*pin6 = daddr6; \
} else { \
TP_STORE_V4MAPPED(__entry, saddr, daddr); \
} \
} while (0)
#else
#define TP_STORE_ADDRS(__entry, saddr, daddr, saddr6, daddr6) \
TP_STORE_V4MAPPED(__entry, saddr, daddr)
#endif
/*
* 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);
__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;
TP_STORE_ADDRS(__entry, inet->inet_saddr, inet->inet_daddr,
sk->sk_v6_rcv_saddr, sk->sk_v6_daddr);
),
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(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)
__field(__u64, sock_cookie)
),
TP_fast_assign(
struct inet_sock *inet = inet_sk(sk);
__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;
TP_STORE_ADDRS(__entry, inet->inet_saddr, inet->inet_daddr,
sk->sk_v6_rcv_saddr, sk->sk_v6_daddr);
__entry->sock_cookie = sock_gen_cookie(sk);
),
TP_printk("sport=%hu dport=%hu saddr=%pI4 daddr=%pI4 saddrv6=%pI6c daddrv6=%pI6c sock_cookie=%llx",
__entry->sport, __entry->dport,
__entry->saddr, __entry->daddr,
__entry->saddr_v6, __entry->daddr_v6,
__entry->sock_cookie)
);
DEFINE_EVENT(tcp_event_sk, tcp_receive_reset,
TP_PROTO(struct sock *sk),
TP_ARGS(sk)
);
DEFINE_EVENT(tcp_event_sk, tcp_destroy_sock,
TP_PROTO(struct sock *sk),
TP_ARGS(sk)
);
DEFINE_EVENT(tcp_event_sk, tcp_rcv_space_adjust,
TP_PROTO(struct sock *sk),
TP_ARGS(sk)
);
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);
__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;
TP_STORE_ADDRS(__entry, ireq->ir_loc_addr, ireq->ir_rmt_addr,
ireq->ir_v6_loc_addr, ireq->ir_v6_rmt_addr);
),
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)
);
#include <trace/events/net_probe_common.h>
TRACE_EVENT(tcp_probe,
TP_PROTO(struct sock *sk, struct sk_buff *skb),
TP_ARGS(sk, skb),
TP_STRUCT__entry(
/* sockaddr_in6 is always bigger than sockaddr_in */
__array(__u8, saddr, sizeof(struct sockaddr_in6))
__array(__u8, daddr, sizeof(struct sockaddr_in6))
__field(__u16, sport)
__field(__u16, dport)
__field(__u32, mark)
__field(__u16, data_len)
__field(__u32, snd_nxt)
__field(__u32, snd_una)
__field(__u32, snd_cwnd)
__field(__u32, ssthresh)
__field(__u32, snd_wnd)
__field(__u32, srtt)
__field(__u32, rcv_wnd)
__field(__u64, sock_cookie)
),
TP_fast_assign(
const struct tcphdr *th = (const struct tcphdr *)skb->data;
const struct inet_sock *inet = inet_sk(sk);
const struct tcp_sock *tp = tcp_sk(sk);
memset(__entry->saddr, 0, sizeof(struct sockaddr_in6));
memset(__entry->daddr, 0, sizeof(struct sockaddr_in6));
TP_STORE_ADDR_PORTS(__entry, inet, sk);
/* For filtering use */
__entry->sport = ntohs(inet->inet_sport);
__entry->dport = ntohs(inet->inet_dport);
__entry->mark = skb->mark;
__entry->data_len = skb->len - __tcp_hdrlen(th);
__entry->snd_nxt = tp->snd_nxt;
__entry->snd_una = tp->snd_una;
__entry->snd_cwnd = tp->snd_cwnd;
__entry->snd_wnd = tp->snd_wnd;
__entry->rcv_wnd = tp->rcv_wnd;
__entry->ssthresh = tcp_current_ssthresh(sk);
__entry->srtt = tp->srtt_us >> 3;
__entry->sock_cookie = sock_gen_cookie(sk);
),
TP_printk("src=%pISpc dest=%pISpc mark=%#x data_len=%d snd_nxt=%#x snd_una=%#x snd_cwnd=%u ssthresh=%u snd_wnd=%u srtt=%u rcv_wnd=%u sock_cookie=%llx",
__entry->saddr, __entry->daddr, __entry->mark,
__entry->data_len, __entry->snd_nxt, __entry->snd_una,
__entry->snd_cwnd, __entry->ssthresh, __entry->snd_wnd,
__entry->srtt, __entry->rcv_wnd, __entry->sock_cookie)
);
#endif /* _TRACE_TCP_H */
/* This part must be outside protection */
#include <trace/define_trace.h>
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