We need to know the rbd options for a rbd device, such as whether lock_on_read
is true or false. then this patch show the rbd options in sysfs.
Signed-off-by: Dongsheng Yang <dongsheng.yang@xxxxxxxxxxxx>
---
drivers/block/rbd.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 45 insertions(+)
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 49e227e..96657ad 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -4129,6 +4129,43 @@ static ssize_t rbd_image_refresh(struct device *dev,
return size;
}
+static ssize_t rbd_queue_depth_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct rbd_device *rbd_dev = dev_to_rbd_dev(dev);
+
+ return sprintf(buf, "%llu\n",
+ (unsigned long long)rbd_dev->opts->queue_depth);
+}
+
+
+static ssize_t rbd_read_only_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct rbd_device *rbd_dev = dev_to_rbd_dev(dev);
+
+ return sprintf(buf, "%s\n",
+ rbd_dev->opts->read_only? "true" : "false");
+}
+
+static ssize_t rbd_lock_on_read_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct rbd_device *rbd_dev = dev_to_rbd_dev(dev);
+
+ return sprintf(buf, "%s\n",
+ rbd_dev->opts->lock_on_read? "true" : "false");
+}
+
+static ssize_t rbd_exclusive_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct rbd_device *rbd_dev = dev_to_rbd_dev(dev);
+
+ return sprintf(buf, "%s\n",
+ rbd_dev->opts->exclusive? "true" : "false");
+}
+
static DEVICE_ATTR(size, S_IRUGO, rbd_size_show, NULL);
static DEVICE_ATTR(features, S_IRUGO, rbd_features_show, NULL);
static DEVICE_ATTR(major, S_IRUGO, rbd_major_show, NULL);
@@ -4145,6 +4182,10 @@ static ssize_t rbd_image_refresh(struct device *dev,
static DEVICE_ATTR(current_snap, S_IRUGO, rbd_snap_show, NULL);
static DEVICE_ATTR(snap_id, S_IRUGO, rbd_snap_id_show, NULL);
static DEVICE_ATTR(parent, S_IRUGO, rbd_parent_show, NULL);
+static DEVICE_ATTR(queue_depth, S_IRUGO, rbd_queue_depth_show, NULL);
+static DEVICE_ATTR(read_only, S_IRUGO, rbd_read_only_show, NULL);
+static DEVICE_ATTR(lock_on_read, S_IRUGO, rbd_lock_on_read_show, NULL);
+static DEVICE_ATTR(exclusive, S_IRUGO, rbd_exclusive_show, NULL);
