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sunrpc: Save remote presentation address in svc_xprt for trace events

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TP_printk defines a format string that is passed to user space for
converting raw trace event records to something human-readable.

My user space's printf (Oracle Linux 7), however, does not have a
%pI format specifier. The result is that what is supposed to be an
IP address in the output of "trace-cmd report" is just a string that
says the field couldn't be displayed.

To fix this, adopt the same approach as the client: maintain a pre-
formated presentation address for occasions when %pI is not
available.

The location of the trace_svc_send trace point is adjusted so that
rqst->rq_xprt is not NULL when the trace event is recorded.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
Chuck Lever
2018-03-27 10:51:00 -04:00
committed by J. Bruce Fields
parent 41f306d0c2
commit ece200ddd5
5 changed files with 43 additions and 58 deletions
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1
net/sunrpc/svcsock.c
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@@ -1310,6 +1310,7 @@ static void svc_tcp_init(struct svc_sock *svsk, struct svc_serv *serv)
set_bit(XPT_CONG_CTRL, &svsk->sk_xprt.xpt_flags);
if (sk->sk_state == TCP_LISTEN) {
dprintk("setting up TCP socket for listening\n");
strcpy(svsk->sk_xprt.xpt_remotebuf, "listener");
set_bit(XPT_LISTENER, &svsk->sk_xprt.xpt_flags);
sk->sk_data_ready = svc_tcp_listen_data_ready;
set_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags);