[SCSI] aacraid: add sysfs report of RAID level

Report the RAID level string for the SCSI device representing the
array. Report is in /sys/class/scsi_device/#:#:#:#/device/level.

Signed-off-by: Mark Salyzyn <aacraid@adaptec.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 25 insertions, 0 deletions

diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index b4ad9effcf50..e6bdc930d528 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -487,6 +487,30 @@ static int aac_change_queue_depth(struct scsi_device *sdev, int depth)
         return sdev->queue_depth;
 }
 
+static ssize_t aac_show_raid_level(struct device *dev, struct device_attribute *attr, char *buf)
+{
+        struct scsi_device * sdev = to_scsi_device(dev);
+        if (sdev_channel(sdev) != CONTAINER_CHANNEL)
+                return snprintf(buf, PAGE_SIZE, sdev->no_uld_attach
+                  ? "Hidden\n" : "JBOD");
+        return snprintf(buf, PAGE_SIZE, "%s\n",
+          get_container_type(((struct aac_dev *)(sdev->host->hostdata))
+            ->fsa_dev[sdev_id(sdev)].type));
+}
+
+static struct device_attribute aac_raid_level_attr = {
+        .attr = {
+                .name = "level",
+                .mode = S_IRUGO,
+        },
+        .show = aac_show_raid_level
+};
+
+static struct device_attribute *aac_dev_attrs[] = {
+        &aac_raid_level_attr,
+        NULL,
+};
+
 static int aac_ioctl(struct scsi_device *sdev, int cmd, void __user * arg)
 {
         struct aac_dev *dev = (struct aac_dev *)sdev->host->hostdata;
@@ -941,6 +965,7 @@ static struct scsi_host_template aac_driver_template = {
         .shost_attrs                    = aac_attrs,
         .slave_configure                = aac_slave_configure,
         .change_queue_depth             = aac_change_queue_depth,
+        .sdev_attrs                     = aac_dev_attrs,
         .eh_abort_handler               = aac_eh_abort,
         .eh_host_reset_handler          = aac_eh_reset,
         .can_queue                      = AAC_NUM_IO_FIB,