diff options
| author | Hannes Reinecke <hare@suse.de> | 2015-12-01 10:16:56 +0100 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2015-12-02 16:42:13 -0500 |
| commit | 248d4fe95f232010846bc648ce92e40b07544c5d (patch) | |
| tree | 3f8402f1a3fc060ddac3f02a5edb6a018dc62e33 | |
| parent | 9983bed3907c379d1d30b7509bb0a871ed655f9d (diff) | |
scsi: export 'wwid' to sysfs
Use scsi_vpd_lun_id() to export the world-wide unique id (wwid) to
sysfs. Note that this is the 'best' wwid according to the rules in
scsi_vpd_lun_id(), not every possible wwid presented by the drive.
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
| -rw-r--r-- | drivers/scsi/scsi_sysfs.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c index d015374f8ea9..ef360533790d 100644 --- a/drivers/scsi/scsi_sysfs.c +++ b/drivers/scsi/scsi_sysfs.c @@ -905,6 +905,22 @@ sdev_show_function(queue_depth, "%d\n"); static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, sdev_store_queue_depth); +static ssize_t +sdev_show_wwid(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct scsi_device *sdev = to_scsi_device(dev); + ssize_t count; + + count = scsi_vpd_lun_id(sdev, buf, PAGE_SIZE); + if (count > 0) { + buf[count] = '\n'; + count++; + } + return count; +} +static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL); + #ifdef CONFIG_SCSI_DH static ssize_t sdev_show_dh_state(struct device *dev, struct device_attribute *attr, @@ -1028,6 +1044,7 @@ static struct attribute *scsi_sdev_attrs[] = { &dev_attr_modalias.attr, &dev_attr_queue_depth.attr, &dev_attr_queue_type.attr, + &dev_attr_wwid.attr, #ifdef CONFIG_SCSI_DH &dev_attr_dh_state.attr, #endif |