[PATCH v3] tools: fix issue with virtio interfaces

This change is required to have the interface name for virtio interfaces.
When we execute the status command the for virtio inerfaces we get
Sample output without the change:
0000:00:04.0 'Virtio network device' if= drv=virtio-pci unused=virtio_pci,igb_uio
Though for other drivers this works.
Sample output with the change:
0000:00:04.0 'Virtio network device' if=eth0 drv=virtio-pci unused=virtio_pci,igb_uio

souvikdey33 (1):
  Signed-off-by: Souvik Dey [off-list ref]

 tools/dpdk-devbind.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

-- 

From 1fb8e8896ca8d5b33bdcc875231bfb5ff72550c6 Mon Sep 17 00:00:00 2001

From: souvikdey33 <redacted>
Date: Fri, 26 Aug 2016 07:27:43 -0400
Subject: [PATCH v3] Signed-off-by: Souvik Dey [off-list ref]

When we execute the status command the for virtio inerfaces the interface name is not shown.
Sample output without the change.
0000:00:04.0 'Virtio network device' if= drv=virtio-pci unused=virtio_pci,igb_uio
Though for other this works.

Fixes: e2af2c716077 ("Signed-off-by: Souvik Dey [off-list ref]")
---
 tools/dpdk-devbind.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tools/dpdk-devbind.py b/tools/dpdk-devbind.py
index b69ca2a..c0b46ee 100755
--- a/tools/dpdk-devbind.py
+++ b/tools/dpdk-devbind.py

@@ -36,6 +36,7 @@ import sys
 import os
 import getopt
 import subprocess
+
 from os.path import exists, abspath, dirname, basename
 
 # The PCI base class for NETWORK devices

@@ -222,8 +223,19 @@ def get_pci_device_details(dev_id):
         device[name] = value
     # check for a unix interface name
     sys_path = "/sys/bus/pci/devices/%s/net/" % dev_id
+    # the path for virtio devices are different, so get the correct path
+    virtio = "/sys/bus/pci/devices/%s/" % dev_id
+    ls = subprocess.Popen(['ls', virtio], stdout=subprocess.PIPE)
+    grep = subprocess.Popen('grep virt'.split(), stdin=ls.stdout,
+                            stdout=subprocess.PIPE)
+    ls.stdout.close()
+    virtio = grep.communicate()[0].rstrip()
+    ls.wait()
+    virtio_sys_path = "/sys/bus/pci/devices/%s/%s/net/" % (dev_id, virtio)
     if exists(sys_path):
         device["Interface"] = ",".join(os.listdir(sys_path))
+    elif exists(virtio_sys_path):
+        device["Interface"] = ",".join(os.listdir(virtio_sys_path))
     else:
         device["Interface"] = ""
     # check if a port is used for ssh connection

-- 
2.9.3.windows.1