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Commit 23d39f63 authored by Milan Broz's avatar Milan Broz Committed by Alasdair G Kergon
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dm ioctl: allow dm_copy_name_and_uuid to return only one field 



Allow NULL buffer in dm_copy_name_and_uuid if you only want to return one of
the fields.

(Required by a following patch that adds these fields to sysfs.)

Signed-off-by: default avatarMilan Broz <mbroz@redhat.com>
Reviewed-by: default avatarAlasdair G Kergon <agk@redhat.com>
Signed-off-by: default avatarAlasdair G Kergon <agk@redhat.com>
parent ac1f0ac2

drivers/md/dm-ioctl.c

+4 −2
Original line number Diff line number Diff line
@@ -1550,7 +1550,9 @@ int dm_copy_name_and_uuid(struct mapped_device *md, char *name, char *uuid) 
		goto out;

	}



	if (name)

		strcpy(name, hc->name);

	if (uuid)

		strcpy(uuid, hc->uuid ? : "");



out: