Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 4dfd5c45 authored by Horst Hummel's avatar Horst Hummel Committed by Martin Schwidefsky
Browse files

[S390] dasd: Add sysfs attribute status and generate uevents. 



This patch adds a sysfs-attribute 'status' to make the DASD device-status
accessible from user-space. In addition, the DASD driver generates an
uevent(CHANGE) for the ccw-device on each device-status change.
This enables user-space applications (e.g. udev) to do related processing.

Signed-off-by: default avatarHorst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent be796285

drivers/s390/block/dasd.c

+3 −0
Original line number Diff line number Diff line
@@ -398,6 +398,9 @@ dasd_change_state(struct dasd_device *device) 


	if (device->state == device->target)

		wake_up(&dasd_init_waitq);



	/* let user-space know that the device status changed */

	kobject_uevent(&device->cdev->dev.kobj, KOBJ_CHANGE);

}



/*

drivers/s390/block/dasd_devmap.c

+41 −0
Original line number Diff line number Diff line
@@ -828,6 +828,46 @@ dasd_discipline_show(struct device *dev, struct device_attribute *attr, 


static DEVICE_ATTR(discipline, 0444, dasd_discipline_show, NULL);



static ssize_t

dasd_device_status_show(struct device *dev, struct device_attribute *attr,

		     char *buf)

{

	struct dasd_device *device;

	ssize_t len;



	device = dasd_device_from_cdev(to_ccwdev(dev));

	if (!IS_ERR(device)) {

		switch (device->state) {

		case DASD_STATE_NEW:

			len = snprintf(buf, PAGE_SIZE, "new\n");

			break;

		case DASD_STATE_KNOWN:

			len = snprintf(buf, PAGE_SIZE, "detected\n");

			break;

		case DASD_STATE_BASIC:

			len = snprintf(buf, PAGE_SIZE, "basic\n");

			break;

		case DASD_STATE_UNFMT:

			len = snprintf(buf, PAGE_SIZE, "unformatted\n");

			break;

		case DASD_STATE_READY:

			len = snprintf(buf, PAGE_SIZE, "ready\n");

			break;

		case DASD_STATE_ONLINE:

			len = snprintf(buf, PAGE_SIZE, "online\n");

			break;

		default:

			len = snprintf(buf, PAGE_SIZE, "no stat\n");

			break;

		}

		dasd_put_device(device);

	} else

		len = snprintf(buf, PAGE_SIZE, "unknown\n");

	return len;

}



static DEVICE_ATTR(status, 0444, dasd_device_status_show, NULL);



static ssize_t

dasd_alias_show(struct device *dev, struct device_attribute *attr, char *buf)

{
@@ -939,6 +979,7 @@ static DEVICE_ATTR(eer_enabled, 0644, dasd_eer_show, dasd_eer_store); 
static struct attribute * dasd_attrs[] = {

	&dev_attr_readonly.attr,

	&dev_attr_discipline.attr,

	&dev_attr_status.attr,

	&dev_attr_alias.attr,

	&dev_attr_vendor.attr,

	&dev_attr_uid.attr,