add mtu information

grub-core/net/drivers/efi/efinet.c

@@ -136,6 +136,7 @@ grub_efinet_findcards (void)
       card->driver = &efidriver;
       card->flags = 0;
       card->default_address.type = GRUB_NET_LINK_LEVEL_PROTOCOL_ETHERNET;
+      card->mtu = net->mode->max_packet_size;
       grub_memcpy (card->default_address.mac,
 		   net->mode->current_address,
 		   sizeof (card->default_address.mac));

grub-core/net/drivers/emu/emunet.c

@@ -1,3 +1,20 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 2010,2011  Free Software Foundation, Inc.
+ *
+ *  GRUB is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  GRUB is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #include <grub/dl.h>
 #include <grub/net/netbuff.h>
@@ -52,6 +69,7 @@ static struct grub_net_card emucard =
   {
     .name = "emu0",
     .driver = &emudriver,
+    .mtu = 1500,
     .default_address = {
 			 .type = GRUB_NET_LINK_LEVEL_PROTOCOL_ETHERNET,
 			 {.mac = {0, 1, 2, 3, 4, 5}}

grub-core/net/drivers/i386/pc/pxe.c

@@ -345,6 +345,7 @@ GRUB_MOD_INIT(pxe)
   if (i == sizeof (grub_pxe_card.default_address.mac))
     grub_memcpy (grub_pxe_card.default_address.mac, ui->permanent_addr,
 		 sizeof (grub_pxe_card.default_address.mac));
+  grub_pxe_card.mtu = ui->mtu;
 
   grub_pxe_card.default_address.type = GRUB_NET_LINK_LEVEL_PROTOCOL_ETHERNET;
 

grub-core/net/drivers/ieee1275/ofnet.c

@@ -28,7 +28,6 @@ struct grub_ofnetcard_data
 {
   char *path;
   grub_ieee1275_ihandle_t handle;
-  grub_uint32_t mtu;
 };
 
 static grub_err_t
@@ -85,7 +84,7 @@ get_card_packet (const struct grub_net_card *dev, struct grub_net_buff *nb)
   grub_netbuff_clear (nb);
   start_time = grub_get_time_ms ();
   do
-    rc = grub_ieee1275_read (data->handle, nb->data, data->mtu, &actual);
+    rc = grub_ieee1275_read (data->handle, nb->data, dev->mtu, &actual);
   while ((actual <= 0 || rc < 0) && (grub_get_time_ms () - start_time < 200));
   if (actual)
     {
@@ -228,12 +227,15 @@ grub_ofnet_findcards (void)
 
 	grub_ieee1275_finddevice (ofdata->path, &devhandle);
 
-	if (grub_ieee1275_get_integer_property
+	{
-	    (devhandle, "max-frame-size", &(ofdata->mtu),
+	  grub_uint32_t t;
-	     sizeof (ofdata->mtu), 0))
+	  if (grub_ieee1275_get_integer_property (devhandle,
-	  {
+						  "max-frame-size", &t,
-	    ofdata->mtu = 1500;
+						  sizeof (t), 0))
-	  }
+	    card->mtu = 1500;
+	  else
+	    card->mtu = t;
+	}
 
 	if (grub_ieee1275_get_property (devhandle, "mac-address",
 					&(lla.mac), 6, 0)

include/grub/net.h

@@ -97,6 +97,7 @@ struct grub_net_card
   int opened;
   unsigned idle_poll_delay_ms;
   grub_uint64_t last_poll;
+  grub_size_t mtu;
   union
   {
 #ifdef GRUB_MACHINE_EFI