From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1768099AbcHROP7 (ORCPT ); Thu, 18 Aug 2016 10:15:59 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:37485 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1768080AbcHROPz (ORCPT ); Thu, 18 Aug 2016 10:15:55 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Trond Myklebust , "J. Bruce Fields" Subject: [PATCH 4.7 173/186] SUNRPC: Dont allocate a full sockaddr_storage for tracing Date: Thu, 18 Aug 2016 15:59:50 +0200 Message-Id: <20160818135939.609696525@linuxfoundation.org> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20160818135932.219369981@linuxfoundation.org> References: <20160818135932.219369981@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.7-stable review patch. If anyone has any objections, please let me know. ------------------ From: Trond Myklebust commit db1bb44c4c7e8d49ed674dc59e5222d99c698088 upstream. We're always tracing IPv4 or IPv6 addresses, so we can save a lot of space on the ringbuffer by allocating the correct sockaddr size. Signed-off-by: Trond Myklebust Fixes: 83a712e0afef "sunrpc: add some tracepoints around ..." Signed-off-by: J. Bruce Fields Signed-off-by: Greg Kroah-Hartman --- include/trace/events/sunrpc.h | 47 ++++++++++++++++++++++++++++++------------ 1 file changed, 34 insertions(+), 13 deletions(-) --- a/include/trace/events/sunrpc.h +++ b/include/trace/events/sunrpc.h @@ -529,20 +529,27 @@ TRACE_EVENT(svc_xprt_do_enqueue, TP_STRUCT__entry( __field(struct svc_xprt *, xprt) - __field_struct(struct sockaddr_storage, ss) __field(int, pid) __field(unsigned long, flags) + __dynamic_array(unsigned char, addr, xprt != NULL ? + xprt->xpt_remotelen : 0) ), TP_fast_assign( __entry->xprt = xprt; - xprt ? memcpy(&__entry->ss, &xprt->xpt_remote, sizeof(__entry->ss)) : memset(&__entry->ss, 0, sizeof(__entry->ss)); __entry->pid = rqst? rqst->rq_task->pid : 0; - __entry->flags = xprt ? xprt->xpt_flags : 0; + if (xprt) { + memcpy(__get_dynamic_array(addr), + &xprt->xpt_remote, + xprt->xpt_remotelen); + __entry->flags = xprt->xpt_flags; + } else + __entry->flags = 0; ), TP_printk("xprt=0x%p addr=%pIScp pid=%d flags=%s", __entry->xprt, - (struct sockaddr *)&__entry->ss, + __get_dynamic_array_len(addr) != 0 ? + (struct sockaddr *)__get_dynamic_array(addr) : NULL, __entry->pid, show_svc_xprt_flags(__entry->flags)) ); @@ -553,18 +560,25 @@ TRACE_EVENT(svc_xprt_dequeue, TP_STRUCT__entry( __field(struct svc_xprt *, xprt) - __field_struct(struct sockaddr_storage, ss) __field(unsigned long, flags) + __dynamic_array(unsigned char, addr, xprt != NULL ? + xprt->xpt_remotelen : 0) ), TP_fast_assign( - __entry->xprt = xprt, - xprt ? memcpy(&__entry->ss, &xprt->xpt_remote, sizeof(__entry->ss)) : memset(&__entry->ss, 0, sizeof(__entry->ss)); - __entry->flags = xprt ? xprt->xpt_flags : 0; + __entry->xprt = xprt; + if (xprt) { + memcpy(__get_dynamic_array(addr), + &xprt->xpt_remote, + xprt->xpt_remotelen); + __entry->flags = xprt->xpt_flags; + } else + __entry->flags = 0; ), TP_printk("xprt=0x%p addr=%pIScp flags=%s", __entry->xprt, - (struct sockaddr *)&__entry->ss, + __get_dynamic_array_len(addr) != 0 ? + (struct sockaddr *)__get_dynamic_array(addr) : NULL, show_svc_xprt_flags(__entry->flags)) ); @@ -592,19 +606,26 @@ TRACE_EVENT(svc_handle_xprt, TP_STRUCT__entry( __field(struct svc_xprt *, xprt) __field(int, len) - __field_struct(struct sockaddr_storage, ss) __field(unsigned long, flags) + __dynamic_array(unsigned char, addr, xprt != NULL ? + xprt->xpt_remotelen : 0) ), TP_fast_assign( __entry->xprt = xprt; - xprt ? memcpy(&__entry->ss, &xprt->xpt_remote, sizeof(__entry->ss)) : memset(&__entry->ss, 0, sizeof(__entry->ss)); __entry->len = len; - __entry->flags = xprt ? xprt->xpt_flags : 0; + if (xprt) { + memcpy(__get_dynamic_array(addr), + &xprt->xpt_remote, + xprt->xpt_remotelen); + __entry->flags = xprt->xpt_flags; + } else + __entry->flags = 0; ), TP_printk("xprt=0x%p addr=%pIScp len=%d flags=%s", __entry->xprt, - (struct sockaddr *)&__entry->ss, + __get_dynamic_array_len(addr) != 0 ? + (struct sockaddr *)__get_dynamic_array(addr) : NULL, __entry->len, show_svc_xprt_flags(__entry->flags)) ); #endif /* _TRACE_SUNRPC_H */