diff options
| author | Joe Jin <[email protected]> | 2018-08-28 07:56:08 -0700 |
|---|---|---|
| committer | Boris Ostrovsky <[email protected]> | 2018-08-28 17:37:40 -0400 |
| commit | 076e2cedd6ea4786569c35f8725b4efdc1ecf2f2 (patch) | |
| tree | d5c6d2f1523f5f130b94e3b63d656d1456c2daa4 | |
| parent | b2d7a075a1ccef2fb321d595802190c8e9b39004 (diff) | |
xen: export device state to sysfs
Export device state to sysfs to allow for easier get device state.
Signed-off-by: Joe Jin <[email protected]>
Reviewed-by: Boris Ostrovsky <[email protected]>
Cc: Boris Ostrovsky <[email protected]>
Cc: Juergen Gross <[email protected]>
Cc: Konrad Rzeszutek Wilk <[email protected]>
Signed-off-by: Boris Ostrovsky <[email protected]>
| -rw-r--r-- | Documentation/ABI/stable/sysfs-bus-xen-backend | 9 | ||||
| -rw-r--r-- | drivers/xen/xenbus/xenbus_probe.c | 9 |
2 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/ABI/stable/sysfs-bus-xen-backend b/Documentation/ABI/stable/sysfs-bus-xen-backend index 3d5951c8bf5f..e8b60bd766f7 100644 --- a/Documentation/ABI/stable/sysfs-bus-xen-backend +++ b/Documentation/ABI/stable/sysfs-bus-xen-backend @@ -73,3 +73,12 @@ KernelVersion: 3.0 Contact: Konrad Rzeszutek Wilk <[email protected]> Description: Number of sectors written by the frontend. + +What: /sys/bus/xen-backend/devices/*/state +Date: August 2018 +KernelVersion: 4.19 +Contact: Joe Jin <[email protected]> +Description: + The state of the device. One of: 'Unknown', + 'Initialising', 'Initialised', 'Connected', 'Closing', + 'Closed', 'Reconfiguring', 'Reconfigured'. 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, }; |