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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2017-12-29 11:47:55 +0900 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-01-02 14:27:30 -0500 |
| commit | ee549be6f061188f306133e3a66ce3d3c6758811 (patch) | |
| tree | e7a89d34f4eea551ab552240b4dc531382dd6731 /net/dccp | |
| parent | fa4475f79251a0539e64c08b8b039be23d107dc9 (diff) | |
| download | linux-stable-ee549be6f061188f306133e3a66ce3d3c6758811.tar.gz linux-stable-ee549be6f061188f306133e3a66ce3d3c6758811.tar.bz2 linux-stable-ee549be6f061188f306133e3a66ce3d3c6758811.zip | |
net: dccp: Add DCCP sendmsg trace event
Add DCCP sendmsg trace event (dccp/dccp_probe) for
replacing dccpprobe. User can trace this event via
ftrace or perftools.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp')
| -rw-r--r-- | net/dccp/Makefile | 3 | ||||
| -rw-r--r-- | net/dccp/proto.c | 5 | ||||
| -rw-r--r-- | net/dccp/trace.h | 84 |
3 files changed, 92 insertions, 0 deletions
diff --git a/net/dccp/Makefile b/net/dccp/Makefile index 2e7b56097bc4..4215f13a63af 100644 --- a/net/dccp/Makefile +++ b/net/dccp/Makefile @@ -27,3 +27,6 @@ dccp-$(CONFIG_SYSCTL) += sysctl.o dccp_diag-y := diag.o dccp_probe-y := probe.o + +# build with local directory for trace.h +CFLAGS_proto.o := -I$(src) diff --git a/net/dccp/proto.c b/net/dccp/proto.c index 7a75a1d3568b..fa7e92e08920 100644 --- a/net/dccp/proto.c +++ b/net/dccp/proto.c @@ -38,6 +38,9 @@ #include "dccp.h" #include "feat.h" +#define CREATE_TRACE_POINTS +#include "trace.h" + DEFINE_SNMP_STAT(struct dccp_mib, dccp_statistics) __read_mostly; EXPORT_SYMBOL_GPL(dccp_statistics); @@ -761,6 +764,8 @@ int dccp_sendmsg(struct sock *sk, struct msghdr *msg, size_t len) int rc, size; long timeo; + trace_dccp_probe(sk, len); + if (len > dp->dccps_mss_cache) return -EMSGSIZE; diff --git a/net/dccp/trace.h b/net/dccp/trace.h new file mode 100644 index 000000000000..5062421beee9 --- /dev/null +++ b/net/dccp/trace.h @@ -0,0 +1,84 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM dccp + +#if !defined(_TRACE_DCCP_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_DCCP_H + +#include <net/sock.h> +#include "dccp.h" +#include "ccids/ccid3.h" +#include <linux/tracepoint.h> +#include <trace/events/net_probe_common.h> + +TRACE_EVENT(dccp_probe, + + TP_PROTO(struct sock *sk, size_t size), + + TP_ARGS(sk, size), + + 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(__u16, size) + __field(__u16, tx_s) + __field(__u32, tx_rtt) + __field(__u32, tx_p) + __field(__u32, tx_x_calc) + __field(__u64, tx_x_recv) + __field(__u64, tx_x) + __field(__u32, tx_t_ipi) + ), + + TP_fast_assign( + const struct inet_sock *inet = inet_sk(sk); + struct ccid3_hc_tx_sock *hc = NULL; + + if (ccid_get_current_tx_ccid(dccp_sk(sk)) == DCCPC_CCID3) + hc = ccid3_hc_tx_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->size = size; + if (hc) { + __entry->tx_s = hc->tx_s; + __entry->tx_rtt = hc->tx_rtt; + __entry->tx_p = hc->tx_p; + __entry->tx_x_calc = hc->tx_x_calc; + __entry->tx_x_recv = hc->tx_x_recv >> 6; + __entry->tx_x = hc->tx_x >> 6; + __entry->tx_t_ipi = hc->tx_t_ipi; + } else { + __entry->tx_s = 0; + memset(&__entry->tx_rtt, 0, (void *)&__entry->tx_t_ipi - + (void *)&__entry->tx_rtt + + sizeof(__entry->tx_t_ipi)); + } + ), + + TP_printk("src=%pISpc dest=%pISpc size=%d tx_s=%d tx_rtt=%d " + "tx_p=%d tx_x_calc=%u tx_x_recv=%llu tx_x=%llu tx_t_ipi=%d", + __entry->saddr, __entry->daddr, __entry->size, + __entry->tx_s, __entry->tx_rtt, __entry->tx_p, + __entry->tx_x_calc, __entry->tx_x_recv, __entry->tx_x, + __entry->tx_t_ipi) +); + +#endif /* _TRACE_TCP_H */ + +/* This part must be outside protection */ +#undef TRACE_INCLUDE_PATH +#define TRACE_INCLUDE_PATH . +#undef TRACE_INCLUDE_FILE +#define TRACE_INCLUDE_FILE trace +#include <trace/define_trace.h> |