Messages in this thread | | | Subject | Re: [PATCH] xen: export device state to sysfs | From | Juergen Gross <> | Date | Tue, 28 Aug 2018 08:30:38 +0200 |
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On 27/08/18 20:44, Joe Jin wrote: > Export device state to sysfs to allow for easier get device state. > > Signed-off-by: Joe Jin <joe.jin@oracle.com> > Boris Ostrovsky <boris.ostrovsky@oracle.com> > Juergen Gross <jgross@suse.com>
Please add the related documentation to
Documentation/ABI/stable/sysfs-bus-xen-backend
Juergen
> --- > drivers/xen/xenbus/xenbus_probe.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/drivers/xen/xenbus/xenbus_probe.c b/drivers/xen/xenbus/xenbus_probe.c > index 74888cacd0b0..52f99b80a1c0 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, > }; > >
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