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dm: sysfs add suspended attribute

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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>
This commit is contained in:
Peter Rajnoha 2009-06-22 10:12:29 +01:00 committed by Alasdair G Kergon
parent 1b6da75459
commit 486d220fe4
1 changed files with 9 additions and 0 deletions
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9
drivers/md/dm-sysfs.c
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@ -57,12 +57,21 @@ static ssize_t dm_attr_uuid_show(struct mapped_device *md, char *buf)
return strlen(buf); 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(name);
static DM_ATTR_RO(uuid); static DM_ATTR_RO(uuid);
static DM_ATTR_RO(suspended);
static struct attribute *dm_attrs[] = { static struct attribute *dm_attrs[] = {
&dm_attr_name.attr, &dm_attr_name.attr,
&dm_attr_uuid.attr, &dm_attr_uuid.attr,
&dm_attr_suspended.attr,
NULL, NULL,
}; };