From: Greg Joyce <gjoyce@xxxxxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxxxxx>
---
block/opal_proto.h | 4 ++++
block/sed-opal.c | 42 ++++++++++++++++++++++++++++++++++-
include/linux/sed-opal.h | 1 +
include/uapi/linux/sed-opal.h | 9 ++++++++
4 files changed, 55 insertions(+), 1 deletion(-)
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 4b9a7ffbf00f..feba36e54ae0 100644
--- a/block/sed-opal.c
+++ b/block/sed-opal.c
@@ -448,7 +448,7 @@ static int opal_discovery0_end(struct opal_dev *dev, void *data)
if (discv_out) {
buf_out = (u8 __user *)(uintptr_t)discv_out->data;
- len_out = min(discv_out->size, (u64)hlen);
+ len_out = min_t(u64, discv_out->size, hlen);
if (buf_out && copy_to_user(buf_out, dev->resp, len_out)) {
return -EFAULT;
}
@@ -1592,6 +1592,26 @@ 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;
@@ -2207,6 +2227,23 @@ 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)
{
@@ -2713,6 +2750,9 @@ 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 114636c19d31..afbce867b906 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 +141,10 @@ struct opal_discovery {
__u64 size;
};
+struct opal_revert_lsp {
+ struct opal_key key;
+ __u32 options;
+};
#define IOC_OPAL_SAVE _IOW('p', 220, struct opal_lock_unlock)
#define IOC_OPAL_LOCK_UNLOCK _IOW('p', 221, struct opal_lock_unlock)
@@ -155,5 +163,6 @@ 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 */
--
2.27.0
