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authorKay Sievers <kay.sievers@vrfy.org>2008-06-13 09:41:00 +0200
committerJens Axboe <jens.axboe@oracle.com>2008-07-03 13:21:12 +0200
commit1c9ce5276324ae566ca409491b99a2cc8d5986fa (patch)
treeeca8ad1317880de5da3f7126e746d366f699348d /block
parent02c62304e6af60f1963695c6bc1bbffe619aa585 (diff)
downloadlinux-2.6.34-ux500-1c9ce5276324ae566ca409491b99a2cc8d5986fa.tar.gz
block: export "ro" attribute
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
-rw-r--r--block/genhd.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/block/genhd.c b/block/genhd.c
index b922d4801c8..43e468ee599 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -400,6 +400,14 @@ static ssize_t disk_removable_show(struct device *dev,
(disk->flags & GENHD_FL_REMOVABLE ? 1 : 0));
}
+static ssize_t disk_ro_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct gendisk *disk = dev_to_disk(dev);
+
+ return sprintf(buf, "%d\n", disk->policy ? 1 : 0);
+}
+
static ssize_t disk_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -472,6 +480,7 @@ static ssize_t disk_fail_store(struct device *dev,
static DEVICE_ATTR(range, S_IRUGO, disk_range_show, NULL);
static DEVICE_ATTR(removable, S_IRUGO, disk_removable_show, NULL);
+static DEVICE_ATTR(ro, S_IRUGO, disk_ro_show, NULL);
static DEVICE_ATTR(size, S_IRUGO, disk_size_show, NULL);
static DEVICE_ATTR(capability, S_IRUGO, disk_capability_show, NULL);
static DEVICE_ATTR(stat, S_IRUGO, disk_stat_show, NULL);
@@ -483,6 +492,7 @@ static struct device_attribute dev_attr_fail =
static struct attribute *disk_attrs[] = {
&dev_attr_range.attr,
&dev_attr_removable.attr,
+ &dev_attr_ro.attr,
&dev_attr_size.attr,
&dev_attr_capability.attr,
&dev_attr_stat.attr,