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vfio-ccw: Rework the io_fctl trace

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Using __field_struct for the schib is convenient, but it doesn't
appear to let us filter based on any of the schib elements.
Specifying the full schid or any element within it results
in various errors by the parser.  So, expand that out to its
component elements, so we can limit the trace to a single device.

While we are at it, rename this trace to the function name, so we
remember what is being traced instead of an abstract reference to the
function control bit of the SCSW.

Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Message-Id: <20191016142040.14132-5-farman@linux.ibm.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Eric Farman 2019-10-16 16:20:40 +02:00 committed by Cornelia Huck
parent d5950b02b7
commit 8529888070
3 changed files with 14 additions and 10 deletions
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4
drivers/s390/cio/vfio_ccw_fsm.c
View File

@ -318,8 +318,8 @@ static void fsm_io_request(struct vfio_ccw_private *private,
}
err_out:
trace_vfio_ccw_io_fctl(scsw->cmd.fctl, schid,
io_region->ret_code, errstr);
trace_vfio_ccw_fsm_io_request(scsw->cmd.fctl, schid,
io_region->ret_code, errstr);
}
/*

2
drivers/s390/cio/vfio_ccw_trace.c
View File

@ -11,4 +11,4 @@
EXPORT_TRACEPOINT_SYMBOL(vfio_ccw_fsm_async_request);
EXPORT_TRACEPOINT_SYMBOL(vfio_ccw_fsm_event);
EXPORT_TRACEPOINT_SYMBOL(vfio_ccw_io_fctl);
EXPORT_TRACEPOINT_SYMBOL(vfio_ccw_fsm_io_request);

18
drivers/s390/cio/vfio_ccw_trace.h
View File

@ -73,28 +73,32 @@ TRACE_EVENT(vfio_ccw_fsm_event,
__entry->event)
);
TRACE_EVENT(vfio_ccw_io_fctl,
TRACE_EVENT(vfio_ccw_fsm_io_request,
TP_PROTO(int fctl, struct subchannel_id schid, int errno, char *errstr),
TP_ARGS(fctl, schid, errno, errstr),
TP_STRUCT__entry(
__field(u8, cssid)
__field(u8, ssid)
__field(u16, sch_no)
__field(int, fctl)
__field_struct(struct subchannel_id, schid)
__field(int, errno)
__field(char*, errstr)
),
TP_fast_assign(
__entry->cssid = schid.cssid;
__entry->ssid = schid.ssid;
__entry->sch_no = schid.sch_no;
__entry->fctl = fctl;
__entry->schid = schid;
__entry->errno = errno;
__entry->errstr = errstr;
),
TP_printk("schid=%x.%x.%04x fctl=%x errno=%d info=%s",
__entry->schid.cssid,
__entry->schid.ssid,
__entry->schid.sch_no,
TP_printk("schid=%x.%x.%04x fctl=0x%x errno=%d info=%s",
__entry->cssid,
__entry->ssid,
__entry->sch_no,
__entry->fctl,
__entry->errno,
__entry->errstr)