commit 6aae6b90a673b2921271c51d06a219be46ff0019
Author: Kay Sievers <[email protected]>
Date: Thu Nov 11 09:42:23 2010 +0100
block: export 'ro' sysfs attribute for partitions
We already export 'ro' for the disk. This adds the same attribute
for partitions.
Cc: Karel Zak <[email protected]>
Signed-off-by: Kay Sievers <[email protected]>
diff --git a/fs/partitions/check.c b/fs/partitions/check.c
index 0a8b0ad..12213f7 100644
--- a/fs/partitions/check.c
+++ b/fs/partitions/check.c
@@ -237,6 +237,13 @@ ssize_t part_size_show(struct device *dev,
return sprintf(buf, "%llu\n",(unsigned long long)p->nr_sects);
}
+ssize_t part_ro_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct hd_struct *p = dev_to_part(dev);
+ return sprintf(buf, "%d\n", p->policy ? 1 : 0);
+}
+
ssize_t part_alignment_offset_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -312,6 +319,7 @@ ssize_t part_fail_store(struct device *dev,
static DEVICE_ATTR(partition, S_IRUGO, part_partition_show, NULL);
static DEVICE_ATTR(start, S_IRUGO, part_start_show, NULL);
static DEVICE_ATTR(size, S_IRUGO, part_size_show, NULL);
+static DEVICE_ATTR(ro, S_IRUGO, part_ro_show, NULL);
static DEVICE_ATTR(alignment_offset, S_IRUGO, part_alignment_offset_show, NULL);
static DEVICE_ATTR(discard_alignment, S_IRUGO, part_discard_alignment_show,
NULL);
@@ -326,6 +334,7 @@ static struct attribute *part_attrs[] = {
&dev_attr_partition.attr,
&dev_attr_start.attr,
&dev_attr_size.attr,
+ &dev_attr_ro.attr,
&dev_attr_alignment_offset.attr,
&dev_attr_discard_alignment.attr,
&dev_attr_stat.attr,