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block: sed-opal: add ioctl for done-mark of shadow mbr

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Enable users to mark the shadow mbr as done without completely
deactivating the shadow mbr feature. This may be useful on reboots,
when the power to the disk is not disconnected in between and the shadow
mbr stores the required boot files. Of course, this saves also the
(few) commands required to enable the feature if it is already enabled
and one only wants to mark the shadow mbr as done.

Co-authored-by: David Kozub <[email protected]>
Signed-off-by: Jonas Rabenstein <[email protected]>
Signed-off-by: David Kozub <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed by: Scott Bauer <[email protected]>
Reviewed-by: Jon Derrick <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Jonas Rabenstein 2019-05-21 22:46:44 +02:00 • committed by Jens Axboe
commit c988844341
3 changed files with 40 additions and 0 deletions
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27
block/sed-opal.c
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@ -1989,6 +1989,30 @@ static int opal_enable_disable_shadow_mbr(struct opal_dev *dev,
return ret;
}
static int opal_set_mbr_done(struct opal_dev *dev,
struct opal_mbr_done *mbr_done)
{
u8 mbr_done_tf = mbr_done->done_flag == OPAL_MBR_DONE ?
OPAL_TRUE : OPAL_FALSE;
const struct opal_step mbr_steps[] = {
{ start_admin1LSP_opal_session, &mbr_done->key },
{ set_mbr_done, &mbr_done_tf },
{ end_opal_session, }
};
int ret;
if (mbr_done->done_flag != OPAL_MBR_DONE &&
mbr_done->done_flag != OPAL_MBR_NOT_DONE)
return -EINVAL;
mutex_lock(&dev->dev_lock);
setup_opal_dev(dev);
ret = execute_steps(dev, mbr_steps, ARRAY_SIZE(mbr_steps));
mutex_unlock(&dev->dev_lock);
return ret;
}
static int opal_save(struct opal_dev *dev, struct opal_lock_unlock *lk_unlk)
{
struct opal_suspend_data *suspend;
@ -2310,6 +2334,9 @@ int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *arg)
case IOC_OPAL_ENABLE_DISABLE_MBR:
ret = opal_enable_disable_shadow_mbr(dev, p);
break;
case IOC_OPAL_MBR_DONE:
ret = opal_set_mbr_done(dev, p);
break;
case IOC_OPAL_ERASE_LR:
ret = opal_erase_locking_range(dev, p);
break;