dm: sysfs add suspended attribute

Add a file named 'suspended' to each device-mapper device directory in sysfs. It holds the value 1 while the device is suspended. Otherwise it holds 0. Signed-off-by: Peter Rajnoha <prajnoha@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>

dm: sysfs add suspended attribute
Add a file named 'suspended' to each device-mapper device directory in sysfs. It holds the value 1 while the device is suspended. Otherwise it holds 0. Signed-off-by: Peter Rajnoha <prajnoha@redhat.com> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Peter Rajnoha · Alasdair G Kergon
1 parent 1b6da75459
Showing 1 changed file with 9 additions and 0 deletions Side-by-side Diff
drivers/md/dm-sysfs.c
@@ -57,12 +57,21 @@
 	return strlen(buf);
 }
  
+static ssize_t dm_attr_suspended_show(struct mapped_device *md, char *buf)
+{
+	sprintf(buf, "%d\n", dm_suspended(md));
+
+	return strlen(buf);
+}
+
 static DM_ATTR_RO(name);
 static DM_ATTR_RO(uuid);
+static DM_ATTR_RO(suspended);
  
 static struct attribute *dm_attrs[] = {
 	&dm_attr_name.attr,
 	&dm_attr_uuid.attr,
+	&dm_attr_suspended.attr,
 	NULL,
 };
...	...	@@ -57,12 +57,21 @@
57	57	return strlen(buf);
58	58	}
59	59
	60	+static ssize_t dm_attr_suspended_show(struct mapped_device md, char buf)
	61	+{
	62	+ sprintf(buf, "%d\n", dm_suspended(md));
	63	+
	64	+ return strlen(buf);
	65	+}
	66	+
60	67	static DM_ATTR_RO(name);
61	68	static DM_ATTR_RO(uuid);
	69	+static DM_ATTR_RO(suspended);
62	70
63	71	static struct attribute *dm_attrs[] = {
64	72	&dm_attr_name.attr,
65	73	&dm_attr_uuid.attr,
	74	+ &dm_attr_suspended.attr,
66	75	NULL,
67	76	};
68	77