Commit 5c82efc1 authored by Greg Joyce's avatar Greg Joyce Committed by Jens Axboe
Browse files

block: sed-opal: Implement IOC_OPAL_REVERT_LSP 



This is used in conjunction with IOC_OPAL_REVERT_TPR to return a drive to
Original Factory State without erasing the data. If IOC_OPAL_REVERT_LSP
is called with opal_revert_lsp.options bit OPAL_PRESERVE set prior
to calling IOC_OPAL_REVERT_TPR, the drive global locking range will not
be erased.

Signed-off-by: default avatarGreg Joyce <gjoyce@linux.vnet.ibm.com>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarJonathan Derrick <jonathan.derrick@linux.dev>
Acked-by: default avatarJarkko Sakkinen <jarkko@kernel.org>
Link: https://lore.kernel.org/r/20230721211534.3437070-3-gjoyce@linux.vnet.ibm.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 9fb10726

block/opal_proto.h

+4 −0
Original line number Diff line number Diff line
@@ -225,6 +225,10 @@ enum opal_parameter { 
	OPAL_SUM_SET_LIST = 0x060000,

};



enum opal_revertlsp {

	OPAL_KEEP_GLOBAL_RANGE_KEY = 0x060000,

};



/* Packets derived from:

 * TCG_Storage_Architecture_Core_Spec_v2.01_r1.00

 * Secion: 3.2.3 ComPackets, Packets & Subpackets

block/sed-opal.c

+40 −0
Original line number Diff line number Diff line
@@ -1769,6 +1769,26 @@ static int internal_activate_user(struct opal_dev *dev, void *data) 
	return finalize_and_send(dev, parse_and_check_status);

}



static int revert_lsp(struct opal_dev *dev, void *data)

{

	struct opal_revert_lsp *rev = data;

	int err;



	err = cmd_start(dev, opaluid[OPAL_THISSP_UID],

			opalmethod[OPAL_REVERTSP]);

	add_token_u8(&err, dev, OPAL_STARTNAME);

	add_token_u64(&err, dev, OPAL_KEEP_GLOBAL_RANGE_KEY);

	add_token_u8(&err, dev, (rev->options & OPAL_PRESERVE) ?

			OPAL_TRUE : OPAL_FALSE);

	add_token_u8(&err, dev, OPAL_ENDNAME);

	if (err) {

		pr_debug("Error building REVERT SP command.\n");

		return err;

	}



	return finalize_and_send(dev, parse_and_check_status);

}



static int erase_locking_range(struct opal_dev *dev, void *data)

{

	struct opal_session_info *session = data;
@@ -2463,6 +2483,23 @@ static int opal_get_discv(struct opal_dev *dev, struct opal_discovery *discv) 
	return discv->size; /* modified to actual length of data */

}



static int opal_revertlsp(struct opal_dev *dev, struct opal_revert_lsp *rev)

{

	/* controller will terminate session */

	const struct opal_step steps[] = {

		{ start_admin1LSP_opal_session, &rev->key },

		{ revert_lsp, rev }

	};

	int ret;



	mutex_lock(&dev->dev_lock);

	setup_opal_dev(dev);

	ret = execute_steps(dev, steps, ARRAY_SIZE(steps));

	mutex_unlock(&dev->dev_lock);



	return ret;

}



static int opal_erase_locking_range(struct opal_dev *dev,

				    struct opal_session_info *opal_session)

{
@@ -3084,6 +3121,9 @@ int sed_ioctl(struct opal_dev *dev, unsigned int cmd, void __user *arg) 
	case IOC_OPAL_GET_GEOMETRY:

		ret = opal_get_geometry(dev, arg);

		break;

	case IOC_OPAL_REVERT_LSP:

		ret = opal_revertlsp(dev, p);

		break;

	case IOC_OPAL_DISCOVERY:

		ret = opal_get_discv(dev, p);

		break;

include/linux/sed-opal.h

+1 −0
Original line number Diff line number Diff line
@@ -48,6 +48,7 @@ static inline bool is_sed_ioctl(unsigned int cmd) 
	case IOC_OPAL_GET_LR_STATUS:

	case IOC_OPAL_GET_GEOMETRY:

	case IOC_OPAL_DISCOVERY:

	case IOC_OPAL_REVERT_LSP:

		return true;

	}

	return false;

include/uapi/linux/sed-opal.h

+11 −0
Original line number Diff line number Diff line
@@ -56,6 +56,10 @@ struct opal_key { 
	__u8 key[OPAL_KEY_MAX];

};



enum opal_revert_lsp_opts {

	OPAL_PRESERVE = 0x01,

};



struct opal_lr_act {

	struct opal_key key;

	__u32 sum;
@@ -178,6 +182,12 @@ struct opal_discovery { 
	__u64 size;

};



struct opal_revert_lsp {

	struct opal_key key;

	__u32 options;

	__u32 __pad;

};



#define IOC_OPAL_SAVE		    _IOW('p', 220, struct opal_lock_unlock)

#define IOC_OPAL_LOCK_UNLOCK	    _IOW('p', 221, struct opal_lock_unlock)

#define IOC_OPAL_TAKE_OWNERSHIP	    _IOW('p', 222, struct opal_key)
@@ -198,5 +208,6 @@ struct opal_discovery { 
#define IOC_OPAL_GET_LR_STATUS      _IOW('p', 237, struct opal_lr_status)

#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)



#endif /* _UAPI_SED_OPAL_H */