[dpdk-dev] [PATCH 2.3] tools/dpdk_nic_bind.py: Verbosely warn the user on bind

[Aaron Conole <aconole@redhat.com>]

DPDK ports are only detected during the EAL initialization. After that, any
new DPDK ports which are bound will not be visible to the application.

The dpdk_nic_bind.py can be a bit more helpful to let users know that DPDK
enabled applications will not find rebound ports until after they have been
restarted.

Signed-off-by: Aaron Conole <aconole@redhat.com>
---
 tools/dpdk_nic_bind.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/dpdk_nic_bind.py b/tools/dpdk_nic_bind.py
index f02454e..ca39389 100755
--- a/tools/dpdk_nic_bind.py
+++ b/tools/dpdk_nic_bind.py
@@ -344,8 +344,10 @@ def bind_one(dev_id, driver, force):
             dev["Driver_str"] = "" # clear driver string
 
     # if we are binding to one of DPDK drivers, add PCI id's to that driver
+    bDpdkDriver = False
     if driver in dpdk_drivers:
         filename = "/sys/bus/pci/drivers/%s/new_id" % driver
+        bDpdkDriver = True
         try:
             f = open(filename, "w")
         except:
@@ -371,12 +373,18 @@ def bind_one(dev_id, driver, force):
     try:
         f.write(dev_id)
         f.close()
+        if bDpdkDriver:
+            print "Device rebound to dpdk driver."
+            print "Remember to restart any application that will use this port."
     except:
         # for some reason, closing dev_id after adding a new PCI ID to new_id
         # results in IOError. however, if the device was successfully bound,
         # we don't care for any errors and can safely ignore IOError
         tmp = get_pci_device_details(dev_id)
         if "Driver_str" in tmp and tmp["Driver_str"] == driver:
+            if bDpdkDriver:
+                print "Device rebound to dpdk driver."
+                print "Remember to restart any application that will use this port."
             return
         print "Error: bind failed for %s - Cannot bind to driver %s" % (dev_id, driver)
         if saved_driver is not None: # restore any previous driver
-- 
2.6.1.133.gf5b6079