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sed-opal: add IOC_OPAL_LR_SET_START_LEN ioctl.

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This ioctl is used to set up locking range start (offset)
and locking range length attributes only.

In Single User Mode (SUM), if the RangeStartRangeLengthPolicy parameter
is set in the 'Reactivate' method, only Admin authority maintains the
locking range length and start (offset) attributes of Locking objects
set up for SUM. All other attributes from struct opal_user_lr_setup
(RLE - read locking enabled, WLE - write locking enabled) shall
remain in possession of the User authority associated with the Locking
object set for SUM.

Therefore, we need a separate function for setting up locking range
start and locking range length because it may require two different
authorities (and sessions) if the RangeStartRangeLengthPolicy attribute
is set.

With the IOC_OPAL_LR_SET_START_LEN ioctl, the opal_user_lr_setup
members 'RLE' and 'WLE' of the ioctl argument are ignored.

Signed-off-by: Ondrej Kozina <okozina@redhat.com>
Reviewed-and-tested-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ondrej Kozina
2026-02-06 15:18:00 +01:00
committed by Jens Axboe
parent 8ff71e6b96
commit 8e3d34a7ce
3 changed files with 30 additions and 0 deletions
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28
block/sed-opal.c
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@@ -3091,6 +3091,31 @@ static int opal_setup_locking_range(struct opal_dev *dev,
return ret;
}
static int opal_setup_locking_range_start_length(struct opal_dev *dev,
struct opal_user_lr_setup *opal_lrs)
{
const struct opal_step lr_steps[] = {
{ start_auth_opal_session, &opal_lrs->session },
{ setup_locking_range_start_length, opal_lrs },
{ end_opal_session, }
};
int ret;
/* we can not set global locking range offset or length */
if (opal_lrs->session.opal_key.lr == 0)
return -EINVAL;
ret = opal_get_key(dev, &opal_lrs->session.opal_key);
if (ret)
return ret;
mutex_lock(&dev->dev_lock);
setup_opal_dev(dev);
ret = execute_steps(dev, lr_steps, ARRAY_SIZE(lr_steps));
mutex_unlock(&dev->dev_lock);
return ret;
}
static int opal_locking_range_status(struct opal_dev *dev,
struct opal_lr_status *opal_lrst,
void __user *data)
@@ -3431,6 +3456,9 @@ int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *arg)
case IOC_OPAL_REACTIVATE_LSP:
ret = opal_reactivate_lsp(dev, p);
break;
case IOC_OPAL_LR_SET_START_LEN:
ret = opal_setup_locking_range_start_length(dev, p);
break;
default:
break;