dpdk: allow interface name to be specified from startup.conf

Example:

dpdk {
    dev 0000:01:00.0 { name eth0 }
    dev 0000:02:00.0 { name eth1 }
}

Change-Id: I11e60e969a7e3548c99ac0c0c3531767819cb157
Signed-off-by: Damjan Marion <damarion@cisco.com>

3 files changed, 15 insertions, 4 deletions

diff --git a/src/plugins/dpdk/device/dpdk.h b/src/plugins/dpdk/device/dpdk.h
index 0e5851dcbc6..4c45e875933 100644
--- a/src/plugins/dpdk/device/dpdk.h
+++ b/src/plugins/dpdk/device/dpdk.h
@@ -218,6 +218,7 @@ typedef struct
   u16 nb_tx_desc;
     CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
 
+  u8 *name;
   u8 *interface_name_suffix;
 
   /* number of sub-interfaces */
@@ -332,6 +333,7 @@ void dpdk_hqos_metadata_set (dpdk_device_hqos_per_worker_thread_t * hqos,
 typedef struct
 {
   vlib_pci_addr_t pci_addr;
+  u8 *name;
   u8 is_blacklisted;
   u8 vlan_strip_offload;
 #define DPDK_DEVICE_VLAN_STRIP_DEFAULT 0
diff --git a/src/plugins/dpdk/device/format.c b/src/plugins/dpdk/device/format.c
index fdc2850e7e0..bbc61e38fc9 100644
--- a/src/plugins/dpdk/device/format.c
+++ b/src/plugins/dpdk/device/format.c
@@ -157,6 +157,9 @@ format_dpdk_device_name (u8 * s, va_list * args)
   struct rte_pci_device *pci_dev;
   u8 *ret;
 
+  if (xd->name)
+    return format (s, "%s", xd->name);
+
   if (dm->conf->interface_name_format_decimal)
     devname_format = "%s%d/%d/%d";
   else
diff --git a/src/plugins/dpdk/device/init.c b/src/plugins/dpdk/device/init.c
index c2e4d220ae2..6cde04123cc 100644
--- a/src/plugins/dpdk/device/init.c
+++ b/src/plugins/dpdk/device/init.c
@@ -320,10 +320,6 @@ dpdk_lib_init (dpdk_main_t * dm)
 			pci_addr.as_u32);
 	}
 
-      if (p)
-	devconf = pool_elt_at_index (dm->conf->dev_confs, p[0]);
-      else
-	devconf = &dm->conf->default_devconf;
 
       /* Create vnet interface */
       vec_add2_aligned (dm->devices, xd, 1, CLIB_CACHE_LINE_BYTES);
@@ -331,6 +327,14 @@ dpdk_lib_init (dpdk_main_t * dm)
       xd->nb_tx_desc = DPDK_NB_TX_DESC_DEFAULT;
       xd->cpu_socket = (i8) rte_eth_dev_socket_id (i);
 
+      if (p)
+	{
+	  devconf = pool_elt_at_index (dm->conf->dev_confs, p[0]);
+	  xd->name = devconf->name;
+	}
+      else
+	devconf = &dm->conf->default_devconf;
+
       /* Handle interface naming for devices with multiple ports sharing same PCI ID */
       if (pci_dev)
 	{
@@ -1028,6 +1032,8 @@ dpdk_device_config (dpdk_config_main_t * conf, vlib_pci_addr_t pci_addr,
 	;
       else if (unformat (input, "num-tx-desc %u", &devconf->num_tx_desc))
 	;
+      else if (unformat (input, "name %s", &devconf->name))
+	;
       else if (unformat (input, "workers %U", unformat_bitmap_list,
 			 &devconf->workers))
 	;