From 076e2cedd6ea4786569c35f8725b4efdc1ecf2f2 Mon Sep 17 00:00:00 2001 From: Joe Jin Date: Tue, 28 Aug 2018 07:56:08 -0700 Subject: xen: export device state to sysfs Export device state to sysfs to allow for easier get device state. Signed-off-by: Joe Jin Reviewed-by: Boris Ostrovsky Cc: Boris Ostrovsky Cc: Juergen Gross Cc: Konrad Rzeszutek Wilk Signed-off-by: Boris Ostrovsky --- drivers/xen/xenbus/xenbus_probe.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/xen') diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c index f2088838f690..5b471889d723 100644 --- a/drivers/xen/xenbus/xenbus_probe.c +++ b/drivers/xen/xenbus/xenbus_probe.c @@ -402,10 +402,19 @@ static ssize_t modalias_show(struct device *dev, } static DEVICE_ATTR_RO(modalias); +static ssize_t state_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + return sprintf(buf, "%s\n", + xenbus_strstate(to_xenbus_device(dev)->state)); +} +static DEVICE_ATTR_RO(state); + static struct attribute *xenbus_dev_attrs[] = { &dev_attr_nodename.attr, &dev_attr_devtype.attr, &dev_attr_modalias.attr, + &dev_attr_state.attr, NULL, }; -- cgit v1.2.3