Merge remote-tracking branch 'net/master'

[karo-tx-linux.git] / drivers / scsi / fcoe / fcoe_transport.c

diff --git a/drivers/scsi/fcoe/fcoe_transport.c b/drivers/scsi/fcoe/fcoe_transport.c
index f6613f9f1bdb26f49bc87e932e80d970023780bf..ad8b4b855f33f0b96fecbacdaea03d6440cb837e 100644 (file)
--- a/drivers/scsi/fcoe/fcoe_transport.c
+++ b/drivers/scsi/fcoe/fcoe_transport.c
@@ -83,6 +83,78 @@ static struct notifier_block libfcoe_notifier = {
        .notifier_call = libfcoe_device_notification,
 };
 
+void fcoe_wwn_to_str(u64 wwn, char *buf, int len)
+{
+       u8 wwpn[8];
+
+       u64_to_wwn(wwn, wwpn);
+       snprintf(buf, len, "%02x%02x%02x%02x%02x%02x%02x%02x",
+                wwpn[0], wwpn[1], wwpn[2], wwpn[3],
+                wwpn[4], wwpn[5], wwpn[6], wwpn[7]);
+}
+EXPORT_SYMBOL_GPL(fcoe_wwn_to_str);
+
+/**
+ * fcoe_validate_vport_create() - Validate a vport before creating it
+ * @vport: NPIV port to be created
+ *
+ * This routine is meant to add validation for a vport before creating it
+ * via fcoe_vport_create().
+ * Current validations are:
+ *      - WWPN supplied is unique for given lport
+ */
+int fcoe_validate_vport_create(struct fc_vport *vport)
+{
+       struct Scsi_Host *shost = vport_to_shost(vport);
+       struct fc_lport *n_port = shost_priv(shost);
+       struct fc_lport *vn_port;
+       int rc = 0;
+       char buf[32];
+
+       mutex_lock(&n_port->lp_mutex);
+
+       fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
+       /* Check if the wwpn is not same as that of the lport */
+       if (!memcmp(&n_port->wwpn, &vport->port_name, sizeof(u64))) {
+               LIBFCOE_TRANSPORT_DBG("vport WWPN 0x%s is same as that of the "
+                                     "base port WWPN\n", buf);
+               rc = -EINVAL;
+               goto out;
+       }
+
+       /* Check if there is any existing vport with same wwpn */
+       list_for_each_entry(vn_port, &n_port->vports, list) {
+               if (!memcmp(&vn_port->wwpn, &vport->port_name, sizeof(u64))) {
+                       LIBFCOE_TRANSPORT_DBG("vport with given WWPN 0x%s "
+                                             "already exists\n", buf);
+                       rc = -EINVAL;
+                       break;
+               }
+       }
+out:
+       mutex_unlock(&n_port->lp_mutex);
+       return rc;
+}
+EXPORT_SYMBOL_GPL(fcoe_validate_vport_create);
+
+/**
+ * fcoe_get_wwn() - Get the world wide name from LLD if it supports it
+ * @netdev: the associated net device
+ * @wwn: the output WWN
+ * @type: the type of WWN (WWPN or WWNN)
+ *
+ * Returns: 0 for success
+ */
+int fcoe_get_wwn(struct net_device *netdev, u64 *wwn, int type)
+{
+       const struct net_device_ops *ops = netdev->netdev_ops;
+
+       if (ops->ndo_fcoe_get_wwn)
+               return ops->ndo_fcoe_get_wwn(netdev, wwn, type);
+       return -EINVAL;
+}
+EXPORT_SYMBOL_GPL(fcoe_get_wwn);
+
 /**
  * fcoe_fc_crc() - Calculates the CRC for a given frame
  * @fp: The frame to be checksumed