avf: check duplicate pci address upon create interface

Entering duplicate pci address when creating an avf interface causes
crash in register_node

(gdb) f 4
145	    error_exit (1);
(gdb) up
354	      clib_error ("more than one node named `%v'", n->name);
(gdb) p n
$1 = (vlib_node_t *) 0x7fffbbe55de4
(gdb) p n->name
$2 = (u8 *) 0x7fffbc410b10 "avf-0/4/a/0-tx"
(gdb)

The fix is to loop through the pci addresses in the avf interface pool
and to reject the duplicate.

Type: improvement

Signed-off-by: Steven Luong <sluong@cisco.com>
Change-Id: I4ed6fb630fb11982d85c5bb325d9f0d6beeaf023

diff --git a/src/plugins/avf/device.c b/src/plugins/avf/device.c
index d711504..32df1df 100644 (file)
--- a/src/plugins/avf/device.c
+++ b/src/plugins/avf/device.c
@@ -1469,6 +1469,19 @@ avf_create_if (vlib_main_t * vm, avf_create_if_args_t * args)
   if (avf_validate_queue_size (args) != 0)
     return;
 
+  /* *INDENT-OFF* */
+  pool_foreach (adp, am->devices, ({
+       if ((*adp)->pci_addr.as_u32 == args->addr.as_u32)
+      {
+       args->rv = VNET_API_ERROR_ADDRESS_IN_USE;
+       args->error =
+         clib_error_return (error, "%U: %s", format_vlib_pci_addr,
+                            &args->addr, "pci address in use");
+       return;
+      }
+  }));
+  /* *INDENT-ON* */
+
   pool_get (am->devices, adp);
   adp[0] = ad = clib_mem_alloc_aligned (sizeof (avf_device_t),
                                        CLIB_CACHE_LINE_BYTES);