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block: sed-opal: Implement IOC_OPAL_REVERT_LSP

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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: Greg Joyce <gjoyce@linux.vnet.ibm.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jonathan Derrick <jonathan.derrick@linux.dev>
Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
Link: https://lore.kernel.org/r/20230721211534.3437070-3-gjoyce@linux.vnet.ibm.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Greg Joyce 2023-07-21 16:15:33 -05:00 committed by Jens Axboe
parent 9fb10726ec
commit 5c82efc1ae
4 changed files with 56 additions and 0 deletions
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4
block/opal_proto.h
View File

@ -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

40
block/sed-opal.c
View File

@ -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;

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

@ -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;

11
include/uapi/linux/sed-opal.h
View File

@ -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 */