Expose hardware sector size
Expose hardware sector size in sysfs queue directory.
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index d9b9afa..bc28776 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -102,6 +102,11 @@
return queue_var_show(max_sectors_kb, (page));
}
+static ssize_t queue_hw_sector_size_show(struct request_queue *q, char *page)
+{
+ return queue_var_show(q->hardsect_size, page);
+}
+
static ssize_t
queue_max_sectors_store(struct request_queue *q, const char *page, size_t count)
{
@@ -160,12 +165,18 @@
.store = elv_iosched_store,
};
+static struct queue_sysfs_entry queue_hw_sector_size_entry = {
+ .attr = {.name = "hw_sector_size", .mode = S_IRUGO },
+ .show = queue_hw_sector_size_show,
+};
+
static struct attribute *default_attrs[] = {
&queue_requests_entry.attr,
&queue_ra_entry.attr,
&queue_max_hw_sectors_entry.attr,
&queue_max_sectors_entry.attr,
&queue_iosched_entry.attr,
+ &queue_hw_sector_size_entry.attr,
NULL,
};