From 84c57ad5d938ff28d85ac93b79c1f918a767a23e Mon Sep 17 00:00:00 2001
From: Sebastian Ott <sebott@linux.vnet.ibm.com>
Date: Mon, 28 Jan 2013 19:32:27 +0100
Subject: [PATCH] s390/cio: export vpm via sysfs
Add new attribute "vpm" to the subchannel sysfs directory of I/O
subchannels. This attribute contains a path mask indicating which
channel paths were successfully verified to be usable for I/O.
Reviewed-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
drivers/s390/cio/device.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 7cd5c6812ac7c..c6767f5a58b23 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -632,6 +632,14 @@ initiate_logging(struct device *dev, struct device_attribute *attr,
return count;
}
+static ssize_t vpm_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct subchannel *sch = to_subchannel(dev);
+
+ return sprintf(buf, "%02x\n", sch->vpm);
+}
+
static DEVICE_ATTR(chpids, 0444, chpids_show, NULL);
static DEVICE_ATTR(pimpampom, 0444, pimpampom_show, NULL);
static DEVICE_ATTR(devtype, 0444, devtype_show, NULL);
@@ -640,11 +648,13 @@ static DEVICE_ATTR(modalias, 0444, modalias_show, NULL);
static DEVICE_ATTR(online, 0644, online_show, online_store);
static DEVICE_ATTR(availability, 0444, available_show, NULL);
static DEVICE_ATTR(logging, 0200, NULL, initiate_logging);
+static DEVICE_ATTR(vpm, 0444, vpm_show, NULL);
static struct attribute *io_subchannel_attrs[] = {
&dev_attr_chpids.attr,
&dev_attr_pimpampom.attr,
&dev_attr_logging.attr,
+ &dev_attr_vpm.attr,
NULL,
};
--
GitLab