From 9c3b41752081295eb04b81965dbaa4272dc4e1dd Mon Sep 17 00:00:00 2001 From: Mikulas Patocka Date: Wed, 3 Aug 2011 10:43:41 +1000 Subject: [PATCH] Exactly one of name, uuid or device must be specified when referencing an existing device. This removes the ambiguity (risking the wrong device being updated) if two conflicting parameters were specified. Previously one parameter got used and any others were ignored silently. Signed-off-by: Mikulas Patocka Signed-off-by: Alasdair G Kergon --- drivers/md/dm-ioctl.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c index 4c350914f4a0..2e9a3ca37bdd 100644 --- a/drivers/md/dm-ioctl.c +++ b/drivers/md/dm-ioctl.c @@ -739,10 +739,16 @@ static struct hash_cell *__find_device_hash_cell(struct dm_ioctl *param) struct hash_cell *hc = NULL; if (*param->uuid) { + if (*param->name || param->dev) + return NULL; + hc = __get_uuid_cell(param->uuid); if (!hc) return NULL; } else if (*param->name) { + if (param->dev) + return NULL; + hc = __get_name_cell(param->name); if (!hc) return NULL; -- 2.39.5