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| author | Horst Hummel <horst.hummel@de.ibm.com> | 2007-04-27 16:01:47 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-04-27 16:01:44 +0200 |
| commit | 4dfd5c4593e69e9d399dd9e01d184dc534408f7e (patch) | |
| tree | 3f148b0c30de75b8ec3a43b247da9d06b24573bc /drivers | |
| parent | be7962856d299a0f231ac36f89f4a89cbecfe0ff (diff) | |
| download | lwn-4dfd5c4593e69e9d399dd9e01d184dc534408f7e.tar.gz lwn-4dfd5c4593e69e9d399dd9e01d184dc534408f7e.zip | |
[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: Horst Hummel <horst.hummel@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/block/dasd.c | 3 | ||||
| -rw-r--r-- | drivers/s390/block/dasd_devmap.c | 41 |
2 files changed, 44 insertions, 0 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index eb5dc62f0d9c..e71929db8b06 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -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); } /* diff --git a/drivers/s390/block/dasd_devmap.c b/drivers/s390/block/dasd_devmap.c index ed70852cc915..66958b8d7c45 100644 --- a/drivers/s390/block/dasd_devmap.c +++ b/drivers/s390/block/dasd_devmap.c @@ -829,6 +829,46 @@ 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) { struct dasd_devmap *devmap; @@ -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, |