On Sun, Apr 05, 2015 at 07:20:19PM +0200, Pali Rohár wrote:
> This patch adds dm message commands and option strings to optionally wipe key
> from dm-crypt device before entering suspend or hibernate state.
Try to avoid 0/1 - use descriptive options instead.
E.g. key wipe_on_hibernation / key retain_on_hibernation (message)
wipe_key_on_hiberation ('dmsetup table' - don't forget the reporting interface!)
Have you tested against every state the driver might be in at the time of
suspend/hibernation?
> +static void crypt_suspend_and_wipe_key(struct crypt_config *cc)
> +{
> + dm_suspend_md(dm_table_get_md(cc->ti->table));
I'm not particularly keen on this - silently ignoring expected error states
like -EINVAL rather than checking first and not calling the function at all
when it's known not to be needed.
Alasdair
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