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Commit 076e2ced authored by Joe Jin's avatar Joe Jin Committed by Boris Ostrovsky
Browse files

xen: export device state to sysfs 



Export device state to sysfs to allow for easier get device state.

Signed-off-by: default avatarJoe Jin <joe.jin@oracle.com>
Reviewed-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: default avatarBoris Ostrovsky <boris.ostrovsky@oracle.com>
parent b2d7a075

Documentation/ABI/stable/sysfs-bus-xen-backend

+9 −0
Original line number Diff line number Diff line
@@ -73,3 +73,12 @@ KernelVersion: 3.0 
Contact:	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

Description:

                Number of sectors written by the frontend.



What:		/sys/bus/xen-backend/devices/*/state

Date:		August 2018

KernelVersion:	4.19

Contact:	Joe Jin <joe.jin@oracle.com>

Description:

                The state of the device. One of: 'Unknown',

                'Initialising', 'Initialised', 'Connected', 'Closing',

                'Closed', 'Reconfiguring', 'Reconfigured'.

drivers/xen/xenbus/xenbus_probe.c

+9 −0
Original line number Diff line number Diff line
@@ -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,

};