[PATCH 17/41] hpsa: add hp_ssd_smart_path_enabled sysfs attribute

Stephen M. Cameron
2014-01-15T21:37:51Z

From: Scott Teel <scott.teel@hp.com>

Signed-off-by: Scott Teel <scott.teel@hp.com>
Acked-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
---
drivers/scsi/hpsa.c | 25 +++++++++++++++++++++++++
1 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index f88bb73..39500d6 100644
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -508,10 +508,34 @@ static ssize_t unique_id_show(struct device *dev,
sn[12], sn[13], sn[14], sn[15]);
}

+static ssize_t host_show_hp_ssd_smart_path_enabled(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct ctlr_info *h;
+ struct scsi_device *sdev;
+ struct hpsa_scsi_dev_t *hdev;
+ unsigned long flags;
+ int offload_enabled;
+
+ sdev = to_scsi_device(dev);
+ h = sdev_to_hba(sdev);
+ spin_lock_irqsave(&h->lock, flags);
+ hdev = sdev->hostdata;
+ if (!hdev) {
+ spin_unlock_irqrestore(&h->lock, flags);
+ return -ENODEV;
+ }
+ offload_enabled = hdev->offload_enabled;
+ spin_unlock_irqrestore(&h->lock, flags);
+ return snprintf(buf, 20, "%d\n", offload_enabled);
+}
+
static DEVICE_ATTR(raid_level, S_IRUGO, raid_level_show, NULL);
static DEVICE_ATTR(lunid, S_IRUGO, lunid_show, NULL);
static DEVICE_ATTR(unique_id, S_IRUGO, unique_id_show, NULL);
static DEVICE_ATTR(rescan, S_IWUSR, NULL, host_store_rescan);
+static DEVICE_ATTR(hp_ssd_smart_path_enabled, S_IRUGO,
+ host_show_hp_ssd_smart_path_enabled, NULL);
static DEVICE_ATTR(firmware_revision, S_IRUGO,
host_show_firmware_revision, NULL);
static DEVICE_ATTR(commands_outstanding, S_IRUGO,
@@ -525,6 +549,7 @@ static struct device_attribute *hpsa_sdev_attrs[] = {
&dev_attr_raid_level,
&dev_attr_lunid,
&dev_attr_unique_id,
+ &dev_attr_hp_ssd_smart_path_enabled,
NULL,
};