diff options
Diffstat (limited to 'drivers/target/target_core_configfs.c')
| -rw-r--r-- | drivers/target/target_core_configfs.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/target/target_core_configfs.c b/drivers/target/target_core_configfs.c index 4b2e49341ad6..102ec644bc8a 100644 --- a/drivers/target/target_core_configfs.c +++ b/drivers/target/target_core_configfs.c @@ -1479,6 +1479,54 @@ static ssize_t target_wwn_revision_store(struct config_item *item, return count; } +static ssize_t +target_wwn_company_id_show(struct config_item *item, + char *page) +{ + return snprintf(page, PAGE_SIZE, "%#08x\n", + to_t10_wwn(item)->company_id); +} + +static ssize_t +target_wwn_company_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; + u32 val; + int ret; + + /* + * The IEEE COMPANY_ID field should contain a 24-bit canonical + * form OUI assigned by the IEEE. + */ + ret = kstrtou32(page, 0, &val); + if (ret < 0) + return ret; + + if (val >= 0x1000000) + return -EOVERFLOW; + + /* + * Check to see if any active 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 Company ID while %u exports exist\n", + dev->export_count); + return -EINVAL; + } + + t10_wwn->company_id = val; + + pr_debug("Target_Core_ConfigFS: Set IEEE Company ID: %#08x\n", + t10_wwn->company_id); + + return count; +} + /* * VPD page 0x80 Unit serial */ @@ -1625,6 +1673,7 @@ DEF_DEV_WWN_ASSOC_SHOW(vpd_assoc_scsi_target_device, 0x20); CONFIGFS_ATTR(target_wwn_, vendor_id); CONFIGFS_ATTR(target_wwn_, product_id); CONFIGFS_ATTR(target_wwn_, revision); +CONFIGFS_ATTR(target_wwn_, company_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); @@ -1635,6 +1684,7 @@ static struct configfs_attribute *target_core_dev_wwn_attrs[] = { &target_wwn_attr_vendor_id, &target_wwn_attr_product_id, &target_wwn_attr_revision, + &target_wwn_attr_company_id, &target_wwn_attr_vpd_unit_serial, &target_wwn_attr_vpd_protocol_identifier, &target_wwn_attr_vpd_assoc_logical_unit, |