Reviewed-by: Jonathan Derrick <[email protected]>
On 8/18/2022 8:30 AM, [email protected] wrote: > From: Greg Joyce <[email protected]> > > 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 <[email protected]> > --- > block/opal_proto.h | 4 ++++ > block/sed-opal.c | 40 +++++++++++++++++++++++++++++++++++ > include/linux/sed-opal.h | 1 + > include/uapi/linux/sed-opal.h | 11 ++++++++++ > 4 files changed, 56 insertions(+) > > diff --git a/block/opal_proto.h b/block/opal_proto.h > index b486b3ec7dc4..6127c08267f8 100644 > --- a/block/opal_proto.h > +++ b/block/opal_proto.h > @@ -210,6 +210,10 @@ 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 > diff --git a/block/sed-opal.c b/block/sed-opal.c > index e4d8fbdc9dad..2916b9539b84 100644 > --- a/block/sed-opal.c > +++ b/block/sed-opal.c > @@ -1593,6 +1593,26 @@ 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; > @@ -2208,6 +2228,23 @@ 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) > { > @@ -2714,6 +2751,9 @@ int sed_ioctl(struct opal_dev *dev, unsigned int cmd, > void __user *arg) > case IOC_OPAL_GENERIC_TABLE_RW: > ret = opal_generic_read_write_table(dev, p); > break; > + case IOC_OPAL_REVERT_LSP: > + ret = opal_revertlsp(dev, p); > + break; > case IOC_OPAL_DISCOVERY: > ret = opal_get_discv(dev, p); > break; > diff --git a/include/linux/sed-opal.h b/include/linux/sed-opal.h > index 9197b7a628f2..3a6082ff97e7 100644 > --- a/include/linux/sed-opal.h > +++ b/include/linux/sed-opal.h > @@ -43,6 +43,7 @@ static inline bool is_sed_ioctl(unsigned int cmd) > case IOC_OPAL_MBR_DONE: > case IOC_OPAL_WRITE_SHADOW_MBR: > case IOC_OPAL_GENERIC_TABLE_RW: > + case IOC_OPAL_REVERT_LSP: > case IOC_OPAL_DISCOVERY: > return true; > } > diff --git a/include/uapi/linux/sed-opal.h b/include/uapi/linux/sed-opal.h > index 89dd108b426f..bc91987a6328 100644 > --- a/include/uapi/linux/sed-opal.h > +++ b/include/uapi/linux/sed-opal.h > @@ -51,6 +51,10 @@ 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; > @@ -137,6 +141,12 @@ 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) > @@ -154,5 +164,6 @@ struct opal_discovery { > #define IOC_OPAL_WRITE_SHADOW_MBR _IOW('p', 234, struct opal_shadow_mbr) > #define IOC_OPAL_GENERIC_TABLE_RW _IOW('p', 235, struct > opal_read_write_table) > #define IOC_OPAL_DISCOVERY _IOW('p', 236, struct opal_discovery) > +#define IOC_OPAL_REVERT_LSP _IOW('p', 237, struct opal_revert_lsp) > > #endif /* _UAPI_SED_OPAL_H */
