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| author |   Sebastian Ott <sebott@linux.vnet.ibm.com> | 2013-01-28 19:32:27 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2013-02-14 15:55:08 +0100 |
| commit | 84c57ad5d938ff28d85ac93b79c1f918a767a23e (patch) | |
| tree | a16bfed7f9871eba623f50b40605b22546f77534 /drivers/s390 | |
| parent | s390/cio: skip broken paths (diff) | |
| download | linux-dev-84c57ad5d938ff28d85ac93b79c1f918a767a23e.tar.xz linux-dev-84c57ad5d938ff28d85ac93b79c1f918a767a23e.zip | |
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>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/cio/device.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c index 7cd5c6812ac7..c6767f5a58b2 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, }; |