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block: sed-opal: add ioctl IOC_OPAL_SET_SID_PW

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After a SED drive is provisioned, there is no way to change the SID
password via the ioctl() interface. A new ioctl IOC_OPAL_SET_SID_PW
will allow the password to be changed. The valid current password is
required.

Signed-off-by: Greg Joyce <gjoyce@linux.ibm.com>
Reviewed-by: Daniel Wagner <dwagner@suse.de>
Link: https://lore.kernel.org/r/20240829175639.6478-2-gjoyce@linux.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Greg Joyce 2024-08-29 12:56:11 -05:00 committed by Jens Axboe
parent 69f407ee8d
commit b21d948f4c
3 changed files with 28 additions and 0 deletions
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26
block/sed-opal.c
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@ -3037,6 +3037,29 @@ static int opal_set_new_pw(struct opal_dev *dev, struct opal_new_pw *opal_pw)
return ret;
}
static int opal_set_new_sid_pw(struct opal_dev *dev, struct opal_new_pw *opal_pw)
{
int ret;
struct opal_key *newkey = &opal_pw->new_user_pw.opal_key;
struct opal_key *oldkey = &opal_pw->session.opal_key;
const struct opal_step pw_steps[] = {
{ start_SIDASP_opal_session, oldkey },
{ set_sid_cpin_pin, newkey },
{ end_opal_session, }
};
if (!dev)
return -ENODEV;
mutex_lock(&dev->dev_lock);
setup_opal_dev(dev);
ret = execute_steps(dev, pw_steps, ARRAY_SIZE(pw_steps));
mutex_unlock(&dev->dev_lock);
return ret;
}
static int opal_activate_user(struct opal_dev *dev,
struct opal_session_info *opal_session)
{
@ -3286,6 +3309,9 @@ int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *arg)
case IOC_OPAL_DISCOVERY:
ret = opal_get_discv(dev, p);
break;
case IOC_OPAL_SET_SID_PW:
ret = opal_set_new_sid_pw(dev, p);
break;
default:
break;

1
include/linux/sed-opal.h
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@ -52,6 +52,7 @@ static inline bool is_sed_ioctl(unsigned int cmd)
case IOC_OPAL_GET_GEOMETRY:
case IOC_OPAL_DISCOVERY:
case IOC_OPAL_REVERT_LSP:
case IOC_OPAL_SET_SID_PW:
return true;
}
return false;

1
include/uapi/linux/sed-opal.h
View File

@ -215,5 +215,6 @@ struct opal_revert_lsp {
#define IOC_OPAL_GET_GEOMETRY _IOR('p', 238, struct opal_geometry)
#define IOC_OPAL_DISCOVERY _IOW('p', 239, struct opal_discovery)
#define IOC_OPAL_REVERT_LSP _IOW('p', 240, struct opal_revert_lsp)
#define IOC_OPAL_SET_SID_PW _IOW('p', 241, struct opal_new_pw)
#endif /* _UAPI_SED_OPAL_H */