From 933df441e771bb8b39e1d90f868bfbdae2ed2b40 Mon Sep 17 00:00:00 2001 From: Thomas Richter Date: Mon, 9 Jul 2018 10:30:34 +0200 Subject: [PATCH] s390 cio: Rewrite trace point in s390_cio_tsch Tools like 'perf stat' parse the trace point format files defined in /sys/kernel/debug/tracing/events/s390/.../format to handle the print fmt: statement. The kernel provides a library in directory linux/tools/lib/traceevent/* for this reason. This library can not handle structures or unions defined in the TRACE_EVENT/TP_STRUCT__entry macros with __field_struct macro. There is no possibility to extract a structure member (which might be a bit field) since there is no packing information nor bit field offset by parsing the printf fmt line. Therefore rewrite the TRACE_EVENT macro and add the __field macro for the necessary members. Keep the __fieldstruct macro to extract the complete structure when dumps are analysed. Note that the same information is displayed, this is no interface change. Signed-off-by: Thomas Richter Reviewed-by: Peter Oberparleiter Acked-by: Sebastian Ott Signed-off-by: Martin Schwidefsky --- drivers/s390/cio/trace.h | 22 ++++++++++++++++++---- 1 file changed, 18 insertions(+), 4 deletions(-) diff --git a/drivers/s390/cio/trace.h b/drivers/s390/cio/trace.h index 4337317f64fd..137410da1e9f 100644 --- a/drivers/s390/cio/trace.h +++ b/drivers/s390/cio/trace.h @@ -89,6 +89,13 @@ TRACE_EVENT(s390_cio_tsch, __field(u8, ssid) __field(u16, schno) __field_struct(struct irb, irb) + __field(u8, scsw_dcc) + __field(u8, scsw_pno) + __field(u8, scsw_fctl) + __field(u8, scsw_actl) + __field(u8, scsw_stctl) + __field(u8, scsw_dstat) + __field(u8, scsw_cstat) __field(int, cc) ), TP_fast_assign( @@ -96,15 +103,22 @@ TRACE_EVENT(s390_cio_tsch, __entry->ssid = schid.ssid; __entry->schno = schid.sch_no; __entry->irb = *irb; + __entry->scsw_dcc = scsw_cc(&irb->scsw); + __entry->scsw_pno = scsw_pno(&irb->scsw); + __entry->scsw_fctl = scsw_fctl(&irb->scsw); + __entry->scsw_actl = scsw_actl(&irb->scsw); + __entry->scsw_stctl = scsw_stctl(&irb->scsw); + __entry->scsw_dstat = scsw_dstat(&irb->scsw); + __entry->scsw_cstat = scsw_cstat(&irb->scsw); __entry->cc = cc; ), TP_printk("schid=%x.%x.%04x cc=%d dcc=%d pno=%d fctl=0x%x actl=0x%x " "stctl=0x%x dstat=0x%x cstat=0x%x", __entry->cssid, __entry->ssid, __entry->schno, __entry->cc, - scsw_cc(&__entry->irb.scsw), scsw_pno(&__entry->irb.scsw), - scsw_fctl(&__entry->irb.scsw), scsw_actl(&__entry->irb.scsw), - scsw_stctl(&__entry->irb.scsw), - scsw_dstat(&__entry->irb.scsw), scsw_cstat(&__entry->irb.scsw) + __entry->scsw_dcc, __entry->scsw_pno, + __entry->scsw_fctl, __entry->scsw_actl, + __entry->scsw_stctl, + __entry->scsw_dstat, __entry->scsw_cstat ) ); -- 2.30.2