dpdk: allow configure individual VMBUS devices

[vpp.git] / src / vlib / linux / vmbus.c

diff --git a/src/vlib/linux/vmbus.c b/src/vlib/linux/vmbus.c
index 2fc438b..d50b539 100644 (file)
--- a/src/vlib/linux/vmbus.c
+++ b/src/vlib/linux/vmbus.c
@@ -118,8 +118,8 @@ linux_vmbus_main_t linux_vmbus_main;
  * "f2c086b2-ff2e-11e8-88de-7bad0a57de05" and convert
  * it to u8[16]
  */
-static uword
-unformat_vlib_vmbus_addr (unformat_input_t * input, va_list * args)
+uword
+unformat_vlib_vmbus_addr (unformat_input_t *input, va_list *args)
 {
   vlib_vmbus_addr_t *addr = va_arg (*args, vlib_vmbus_addr_t *);
   uword ret = 0;
@@ -137,8 +137,8 @@ unformat_vlib_vmbus_addr (unformat_input_t * input, va_list * args)
 }
 
 /* Convert bus address to standard UUID string */
-static u8 *
-format_vlib_vmbus_addr (u8 * s, va_list * va)
+u8 *
+format_vlib_vmbus_addr (u8 *s, va_list *va)
 {
   vlib_vmbus_addr_t *addr = va_arg (*va, vlib_vmbus_addr_t *);
   char tmp[40];
@@ -297,15 +297,21 @@ vlib_vmbus_bind_to_uio (vlib_vmbus_addr_t * addr)
       vec_reset_length (s);
       s = format (s, "%s/%s/new_id%c", sysfs_vmbus_drv_path, uio_drv_name, 0);
       error = clib_sysfs_write ((char *) s, "%s", netvsc_uuid);
-
+      /* If device already exists, we can bind/unbind/override driver */
       if (error)
        {
-         close (fd);
-         goto done;
+         if (error->code == EEXIST)
+           {
+             clib_error_free (error);
+           }
+         else
+           {
+             close (fd);
+             goto done;
+           }
        }
 
       uio_new_id_needed = 0;
-
     }
 
   error = vlib_vmbus_raise_lower (fd, ifname);