[SCSI] qla4xxx: Added support to update mtu

Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>

drivers/scsi/qla4xxx/ql4_def.h

@@ -343,6 +343,7 @@ struct ipaddress_config {
 	struct in6_addr ipv6_addr0;
 	struct in6_addr ipv6_addr1;
 	struct in6_addr ipv6_default_router_addr;
+	uint16_t eth_mtu_size;
 };
 
 #define QL4_CHAP_MAX_NAME_LEN 256

drivers/scsi/qla4xxx/ql4_mbx.c

@@ -333,6 +333,8 @@ qla4xxx_update_local_ip(struct scsi_qla_host *ha,
 	ha->ip_config.ipv4_options = le16_to_cpu(init_fw_cb->ipv4_ip_opts);
 	ha->ip_config.ipv4_addr_state =
 				le16_to_cpu(init_fw_cb->ipv4_addr_state);
+	ha->ip_config.eth_mtu_size =
+				le16_to_cpu(init_fw_cb->eth_mtu_size);
 
 	if (ha->acb_version == ACB_SUPPORTED) {
 		ha->ip_config.ipv6_options = le16_to_cpu(init_fw_cb->ipv6_opts);

drivers/scsi/qla4xxx/ql4_os.c

@@ -230,6 +230,7 @@ static mode_t ql4_attr_is_visible(int param_type, int param)
 		case ISCSI_NET_PARAM_VLAN_ID:
 		case ISCSI_NET_PARAM_VLAN_PRIORITY:
 		case ISCSI_NET_PARAM_VLAN_ENABLED:
+		case ISCSI_NET_PARAM_MTU:
 			return S_IRUGO;
 		default:
 			return 0;
@@ -335,6 +336,9 @@ static int qla4xxx_get_iface_param(struct iscsi_iface *iface,
 				       IPV6_OPT_VLAN_TAGGING_ENABLE) ?
 				       "enabled" : "disabled");
 		break;
+	case ISCSI_NET_PARAM_MTU:
+		len = sprintf(buf, "%d\n", ha->ip_config.eth_mtu_size);
+		break;
 	default:
 		len = -ENOSYS;
 	}
@@ -718,6 +722,10 @@ static void qla4xxx_set_ipv6(struct scsi_qla_host *ha,
 			init_fw_cb->ipv6_opts &=
 				cpu_to_le16(~IPV6_OPT_VLAN_TAGGING_ENABLE);
 		break;
+	case ISCSI_NET_PARAM_MTU:
+		init_fw_cb->eth_mtu_size =
+				cpu_to_le16(*(uint16_t *)iface_param->value);
+		break;
 	default:
 		ql4_printk(KERN_ERR, ha, "Unknown IPv6 param = %d\n",
 			   iface_param->param);
@@ -778,6 +786,10 @@ static void qla4xxx_set_ipv4(struct scsi_qla_host *ha,
 			init_fw_cb->ipv4_ip_opts &=
 					cpu_to_le16(~IPOPT_VLAN_TAGGING_ENABLE);
 		break;
+	case ISCSI_NET_PARAM_MTU:
+		init_fw_cb->eth_mtu_size =
+				cpu_to_le16(*(uint16_t *)iface_param->value);
+		break;
 	default:
 		ql4_printk(KERN_ERR, ha, "Unknown IPv4 param = %d\n",
 			   iface_param->param);