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SUNRPC: Add tracepoints to help debug socket connection issues 

Add client side debugging to help trace socket connection/disconnection
and unexpected state change issues.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2013-09-04 12:16:23 -04:00
parent b6a85258d8
commit 40b5ea0c25
2 changed files with 143 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

131
include/trace/events/sunrpc.h
View File

@ -6,6 +6,8 @@
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/clnt.h>
#include <net/tcp_states.h>
#include <linux/net.h>
#include <linux/tracepoint.h>
DECLARE_EVENT_CLASS(rpc_task_status,
@ -172,6 +174,135 @@ DEFINE_EVENT(rpc_task_queued, rpc_task_wakeup,
);
#define rpc_show_socket_state(state) \
__print_symbolic(state, \
{ SS_FREE, "FREE" }, \
{ SS_UNCONNECTED, "UNCONNECTED" }, \
{ SS_CONNECTING, "CONNECTING," }, \
{ SS_CONNECTED, "CONNECTED," }, \
{ SS_DISCONNECTING, "DISCONNECTING" })
#define rpc_show_sock_state(state) \
__print_symbolic(state, \
{ TCP_ESTABLISHED, "ESTABLISHED" }, \
{ TCP_SYN_SENT, "SYN_SENT" }, \
{ TCP_SYN_RECV, "SYN_RECV" }, \
{ TCP_FIN_WAIT1, "FIN_WAIT1" }, \
{ TCP_FIN_WAIT2, "FIN_WAIT2" }, \
{ TCP_TIME_WAIT, "TIME_WAIT" }, \
{ TCP_CLOSE, "CLOSE" }, \
{ TCP_CLOSE_WAIT, "CLOSE_WAIT" }, \
{ TCP_LAST_ACK, "LAST_ACK" }, \
{ TCP_LISTEN, "LISTEN" }, \
{ TCP_CLOSING, "CLOSING" })
DECLARE_EVENT_CLASS(xs_socket_event,
TP_PROTO(
struct rpc_xprt *xprt,
struct socket *socket
),
TP_ARGS(xprt, socket),
TP_STRUCT__entry(
__field(unsigned int, socket_state)
__field(unsigned int, sock_state)
__field(unsigned long long, ino)
__string(dstaddr,
xprt->address_strings[RPC_DISPLAY_ADDR])
__string(dstport,
xprt->address_strings[RPC_DISPLAY_PORT])
),
TP_fast_assign(
struct inode *inode = SOCK_INODE(socket);
__entry->socket_state = socket->state;
__entry->sock_state = socket->sk->sk_state;
__entry->ino = (unsigned long long)inode->i_ino;
__assign_str(dstaddr,
xprt->address_strings[RPC_DISPLAY_ADDR]);
__assign_str(dstport,
xprt->address_strings[RPC_DISPLAY_PORT]);
),
TP_printk(
"socket:[%llu] dstaddr=%s/%s "
"state=%u (%s) sk_state=%u (%s)",
__entry->ino, __get_str(dstaddr), __get_str(dstport),
__entry->socket_state,
rpc_show_socket_state(__entry->socket_state),
__entry->sock_state,
rpc_show_sock_state(__entry->sock_state)
)
);
#define DEFINE_RPC_SOCKET_EVENT(name) \
DEFINE_EVENT(xs_socket_event, name, \
TP_PROTO( \
struct rpc_xprt *xprt, \
struct socket *socket \
), \
TP_ARGS(xprt, socket))
DECLARE_EVENT_CLASS(xs_socket_event_done,
TP_PROTO(
struct rpc_xprt *xprt,
struct socket *socket,
int error
),
TP_ARGS(xprt, socket, error),
TP_STRUCT__entry(
__field(int, error)
__field(unsigned int, socket_state)
__field(unsigned int, sock_state)
__field(unsigned long long, ino)
__string(dstaddr,
xprt->address_strings[RPC_DISPLAY_ADDR])
__string(dstport,
xprt->address_strings[RPC_DISPLAY_PORT])
),
TP_fast_assign(
struct inode *inode = SOCK_INODE(socket);
__entry->socket_state = socket->state;
__entry->sock_state = socket->sk->sk_state;
__entry->ino = (unsigned long long)inode->i_ino;
__entry->error = error;
__assign_str(dstaddr,
xprt->address_strings[RPC_DISPLAY_ADDR]);
__assign_str(dstport,
xprt->address_strings[RPC_DISPLAY_PORT]);
),
TP_printk(
"error=%d socket:[%llu] dstaddr=%s/%s "
"state=%u (%s) sk_state=%u (%s)",
__entry->error,
__entry->ino, __get_str(dstaddr), __get_str(dstport),
__entry->socket_state,
rpc_show_socket_state(__entry->socket_state),
__entry->sock_state,
rpc_show_sock_state(__entry->sock_state)
)
);
#define DEFINE_RPC_SOCKET_EVENT_DONE(name) \
DEFINE_EVENT(xs_socket_event_done, name, \
TP_PROTO( \
struct rpc_xprt *xprt, \
struct socket *socket, \
int error \
), \
TP_ARGS(xprt, socket, error))
DEFINE_RPC_SOCKET_EVENT(rpc_socket_state_change);
DEFINE_RPC_SOCKET_EVENT_DONE(rpc_socket_connect);
DEFINE_RPC_SOCKET_EVENT_DONE(rpc_socket_reset_connection);
DEFINE_RPC_SOCKET_EVENT(rpc_socket_close);
DEFINE_RPC_SOCKET_EVENT(rpc_socket_shutdown);
#endif /* _TRACE_SUNRPC_H */
#include <trace/define_trace.h>

13
net/sunrpc/xprtsock.c
View File

@ -47,6 +47,8 @@
#include <net/udp.h>
#include <net/tcp.h>
#include <trace/events/sunrpc.h>
#include "sunrpc.h"
static void xs_close(struct rpc_xprt *xprt);
@ -665,8 +667,10 @@ static void xs_tcp_shutdown(struct rpc_xprt *xprt)
struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt);
struct socket *sock = transport->sock;
if (sock != NULL)
if (sock != NULL) {
kernel_sock_shutdown(sock, SHUT_WR);
trace_rpc_socket_shutdown(xprt, sock);
}
}
/**
@ -811,6 +815,7 @@ static void xs_reset_transport(struct sock_xprt *transport)
sk->sk_no_check = 0;
trace_rpc_socket_close(&transport->xprt, sock);
sock_release(sock);
}
@ -1492,6 +1497,7 @@ static void xs_tcp_state_change(struct sock *sk)
sock_flag(sk, SOCK_ZAPPED),
sk->sk_shutdown);
trace_rpc_socket_state_change(xprt, sk->sk_socket);
switch (sk->sk_state) {
case TCP_ESTABLISHED:
spin_lock(&xprt->transport_lock);
@ -1896,6 +1902,7 @@ static int xs_local_setup_socket(struct sock_xprt *transport)
xprt, xprt->address_strings[RPC_DISPLAY_ADDR]);
status = xs_local_finish_connecting(xprt, sock);
trace_rpc_socket_connect(xprt, sock, status);
switch (status) {
case 0:
dprintk("RPC: xprt %p connected to %s\n",
@ -2039,6 +2046,7 @@ static void xs_udp_setup_socket(struct work_struct *work)
xprt->address_strings[RPC_DISPLAY_PORT]);
xs_udp_finish_connecting(xprt, sock);
trace_rpc_socket_connect(xprt, sock, 0);
status = 0;
out:
xprt_clear_connecting(xprt);
@ -2064,6 +2072,8 @@ static void xs_abort_connection(struct sock_xprt *transport)
memset(&any, 0, sizeof(any));
any.sa_family = AF_UNSPEC;
result = kernel_connect(transport->sock, &any, sizeof(any), 0);
trace_rpc_socket_reset_connection(&transport->xprt,
transport->sock, result);
if (!result)
xs_sock_reset_connection_flags(&transport->xprt);
dprintk("RPC: AF_UNSPEC connect return code %d\n", result);
@ -2194,6 +2204,7 @@ static void xs_tcp_setup_socket(struct work_struct *work)
xprt->address_strings[RPC_DISPLAY_PORT]);
status = xs_tcp_finish_connecting(xprt, sock);
trace_rpc_socket_connect(xprt, sock, status);
dprintk("RPC: %p connect status %d connected %d sock state %d\n",
xprt, -status, xprt_connected(xprt),
sock->sk->sk_state);