The vendor_id attribute will allow for the modification of the T10
Vendor Identification string returned in inquiry responses. Its value
can be viewed and modified via the ConfigFS path at:
target/core/$backstore/$name/wwn/vendor_id
"LIO-ORG" remains the default value, which is set when the backstore
device is enabled.
Signed-off-by: David Disseldorp <ddiss@xxxxxxx>
---
drivers/target/target_core_configfs.c | 55 +++++++++++++++++++++++++++++++++++
include/target/target_core_base.h | 3 +-
2 files changed, 57 insertions(+), 1 deletion(-)
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c
index f6b1549f4142..64e95376d998 100644
--- a/drivers/target/target_core_configfs.c
+++ b/drivers/target/target_core_configfs.c
@@ -1211,6 +1211,59 @@ static struct t10_wwn *to_t10_wwn(struct config_item *item)
}
/*
+ * STANDARD and VPD page 0x80 T10 Vendor Identification
+ */
+static ssize_t target_wwn_vendor_id_show(struct config_item *item,
+ char *page)
+{
+ return sprintf(page, "T10 Vendor Identification: %."
+ __stringify(INQUIRY_VENDOR_IDENTIFIER_LEN) "s\n",
+ &to_t10_wwn(item)->vendor[0]);
+}
+
+static ssize_t target_wwn_vendor_id_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct t10_wwn *t10_wwn = to_t10_wwn(item);
+ struct se_device *dev = t10_wwn->t10_dev;
+ /* +1 to ensure buf is zero terminated for stripping */
+ unsigned char buf[INQUIRY_VENDOR_IDENTIFIER_LEN + 1];
+
+ if (strlen(page) > INQUIRY_VENDOR_IDENTIFIER_LEN) {
+ pr_err("Emulated T10 Vendor Identification exceeds"
+ " INQUIRY_VENDOR_IDENTIFIER_LEN: %d\n",
+ INQUIRY_VENDOR_IDENTIFIER_LEN);
+ return -EOVERFLOW;
+ }
+ strncpy(buf, page, sizeof(buf));
+ /*
+ * Check to see if any active $FABRIC_MOD exports exist. If they
+ * do exist, fail here as changing this information on the fly
+ * (underneath the initiator side OS dependent multipath code)
+ * could cause negative effects.
+ */
+ if (dev->export_count) {
+ pr_err("Unable to set T10 Vendor Identification while"
+ " active %d $FABRIC_MOD exports exist\n",
+ dev->export_count);
+ return -EINVAL;
+ }
+
+ /*
+ * Assume ASCII encoding. Strip any newline added from userspace.
+ * The result may *not* be null terminated.
+ */
+ strncpy(dev->t10_wwn.vendor, strstrip(buf),
+ INQUIRY_VENDOR_IDENTIFIER_LEN);
+
+ pr_debug("Target_Core_ConfigFS: Set emulated T10 Vendor Identification:"
+ " %." __stringify(INQUIRY_VENDOR_IDENTIFIER_LEN) "s\n",
+ dev->t10_wwn.vendor);
+
+ return count;
+}
+
+/*
* VPD page 0x80 Unit serial
*/
static ssize_t target_wwn_vpd_unit_serial_show(struct config_item *item,
@@ -1356,6 +1409,7 @@ DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_target_port, 0x10);
/* VPD page 0x83 Association: SCSI Target Device */
DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20);
+CONFIGFS_ATTR(target_wwn_, vendor_id);
CONFIGFS_ATTR(target_wwn_, vpd_unit_serial);
CONFIGFS_ATTR_RO(target_wwn_, vpd_protocol_identifier);
CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_logical_unit);
@@ -1363,6 +1417,7 @@ CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_target_port);
CONFIGFS_ATTR_RO(target_wwn_, vpd_assoc_scsi_target_device);
static struct configfs_attribute *target_core_dev_wwn_attrs[] = {
+ &target_wwn_attr_vendor_id,
&target_wwn_attr_vpd_unit_serial,
&target_wwn_attr_vpd_protocol_identifier,
&target_wwn_attr_vpd_assoc_logical_unit,
diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h
index e3bdb0550a59..45be5427326d 100644
--- a/include/target/target_core_base.h
+++ b/include/target/target_core_base.h
@@ -45,6 +45,7 @@
#define INQUIRY_VPD_SERIAL_LEN 254
/* Used by transport_get_inquiry_vpd_device_ident() */
#define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
+#define INQUIRY_VENDOR_IDENTIFIER_LEN 8
/* Attempts before moving from SHORT to LONG */
#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
@@ -314,7 +315,7 @@ struct t10_vpd {
};
struct t10_wwn {
- char vendor[8];
+ char vendor[INQUIRY_VENDOR_IDENTIFIER_LEN];
char model[16];
char revision[4];
char unit_serial[INQUIRY_VPD_SERIAL_LEN];
--
2.13.7
