diff mbox series

[2/4] block: sed-opal: Implement IOC_OPAL_REVERT_LSP

Message ID 20220718210156.1535955-3-gjoyce@linux.vnet.ibm.com (mailing list archive)
State New
Headers show
Series sed-opal: keyrings, discovery, revert and key store | expand

Commit Message

Greg Joyce July 18, 2022, 9:01 p.m. UTC 
From: Greg Joyce <gjoyce@linux.vnet.ibm.com>

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>
---
 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(-)

Comments

Christoph Hellwig July 20, 2022, 7:44 a.m. UTC | #1 
On Mon, Jul 18, 2022 at 04:01:54PM -0500, gjoyce@linux.vnet.ibm.com wrote:
> From: Greg Joyce <gjoyce@linux.vnet.ibm.com>
> 
> 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>
> ---
>  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);

This seems like it should go into the previous patch (or just dropped).

> +
>  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;

this wants a __u32 __pad at the end to avoid struct padding problems.
diff mbox series

Patch

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 */