From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001

From: Paulo Flabiano Smorigo <pfsmorigo@br.ibm.com>

Date: Tue, 4 Feb 2014 19:00:55 -0200

Subject: [PATCH] add bootpath parser for open firmware

It enables net boot even when there is no bootp/dhcp server.

* grub-core/net/drivers/ieee1275/ofnet.c: Add grub_ieee1275_parse_bootpath and

call it at grub_ieee1275_net_config_real.

* grub-core/kern/ieee1275/init.c: Add bootpath to grub_ieee1275_net_config.

* include/grub/ieee1275/ieee1275.h: Likewise.

---

 grub-core/kern/ieee1275/init.c         |   7 +--

 grub-core/net/drivers/ieee1275/ofnet.c | 107 ++++++++++++++++++++++++++++++++-

 include/grub/ieee1275/ieee1275.h       |   5 +-

 ChangeLog                              |  13 ++++

 4 files changed, 125 insertions(+), 7 deletions(-)

diff --git a/grub-core/kern/ieee1275/init.c b/grub-core/kern/ieee1275/init.c

index 89b2822e14d..d5bd74d3552 100644

--- a/grub-core/kern/ieee1275/init.c

+++ b/grub-core/kern/ieee1275/init.c

@@ -80,9 +80,8 @@ grub_translate_ieee1275_path (char *filepath)

     }

 }

-void (*grub_ieee1275_net_config) (const char *dev,

-				  char **device,

-				  char **path);

+void (*grub_ieee1275_net_config) (const char *dev, char **device, char **path,

+                                  char *bootpath);

 void

 grub_machine_get_bootlocation (char **device, char **path)

 {

@@ -126,7 +125,7 @@ grub_machine_get_bootlocation (char **device, char **path)

       *ptr = 0;

       if (grub_ieee1275_net_config)

-	grub_ieee1275_net_config (canon, device, path);

+	grub_ieee1275_net_config (canon, device, path, bootpath);

       grub_free (dev);

       grub_free (canon);

     }

diff --git a/grub-core/net/drivers/ieee1275/ofnet.c b/grub-core/net/drivers/ieee1275/ofnet.c

index 4483c9122f7..eea8e71d300 100644

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

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

@@ -127,8 +127,111 @@ bootp_response_properties[] =

     { .name = "bootpreply-packet", .offset = 0x2a},

   };

+enum

+{

+  BOOTARGS_SERVER_ADDR,

+  BOOTARGS_FILENAME,

+  BOOTARGS_CLIENT_ADDR,

+  BOOTARGS_GATEWAY_ADDR,

+  BOOTARGS_BOOTP_RETRIES,

+  BOOTARGS_TFTP_RETRIES,

+  BOOTARGS_SUBNET_MASK,

+  BOOTARGS_BLOCKSIZE

+};

+

+static int

+grub_ieee1275_parse_bootpath (const char *devpath, char *bootpath,

+                              char **device, struct grub_net_card **card)

+{

+  char *args;

+  char *comma_char = 0;

+  char *equal_char = 0;

+  grub_size_t field_counter = 0;

+

+  grub_net_network_level_address_t client_addr, gateway_addr, subnet_mask;

+  grub_net_link_level_address_t hw_addr;

+  grub_net_interface_flags_t flags = 0;

+  struct grub_net_network_level_interface *inter;

+

+  hw_addr.type = GRUB_NET_LINK_LEVEL_PROTOCOL_ETHERNET;

+

+  args = bootpath + grub_strlen (devpath) + 1;

+  do

+    {

+      comma_char = grub_strchr (args, ',');

+      if (comma_char != 0)

+        *comma_char = 0;

+

+      /* Check if it's an option (like speed=auto) and not a default parameter */

+      equal_char = grub_strchr (args, '=');

+      if (equal_char != 0)

+        {

+          *equal_char = 0;

+          grub_env_set_net_property ((*card)->name, args, equal_char + 1,

+                                     grub_strlen(equal_char + 1));

+          *equal_char = '=';

+        }

+      else

+        {

+          switch (field_counter++)

+            {

+            case BOOTARGS_SERVER_ADDR:

+              *device = grub_xasprintf ("tftp,%s", args);

+              if (!*device)

+                return grub_errno;

+              break;

+

+            case BOOTARGS_CLIENT_ADDR:

+              grub_net_resolve_address (args, &client_addr);

+              break;

+

+            case BOOTARGS_GATEWAY_ADDR:

+              grub_net_resolve_address (args, &gateway_addr);

+              break;

+

+            case BOOTARGS_SUBNET_MASK:

+              grub_net_resolve_address (args, &subnet_mask);

+              break;

+            }

+        }

+      args = comma_char + 1;

+      if (comma_char != 0)

+        *comma_char = ',';

+    } while (comma_char != 0);

+

+  if ((client_addr.ipv4 != 0) && (subnet_mask.ipv4 != 0))

+    {

+      grub_ieee1275_phandle_t devhandle;

+      grub_ieee1275_finddevice (devpath, &devhandle);

+      grub_ieee1275_get_property (devhandle, "mac-address",

+                                  hw_addr.mac, sizeof(hw_addr.mac), 0);

+      inter = grub_net_add_addr ((*card)->name, *card, &client_addr, &hw_addr,

+                                 flags);

+      grub_net_add_ipv4_local (inter,

+                          __builtin_ctz (~grub_le_to_cpu32 (subnet_mask.ipv4)));

+    }

+

+  if (gateway_addr.ipv4 != 0)

+    {

+      grub_net_network_level_netaddress_t target;

+      char *rname;

+

+      target.type = GRUB_NET_NETWORK_LEVEL_PROTOCOL_IPV4;

+      target.ipv4.base = 0;

+      target.ipv4.masksize = 0;

+      rname = grub_xasprintf ("%s:default", ((*card)->name));

+      if (rname)

+        grub_net_add_route_gw (rname, target, gateway_addr);

+      else

+        return grub_errno;

+    }

+

+  return 0;

+}

+

 static void

-grub_ieee1275_net_config_real (const char *devpath, char **device, char **path)

+grub_ieee1275_net_config_real (const char *devpath, char **device, char **path,

+                               char *bootpath)

 {

   struct grub_net_card *card;

@@ -158,6 +261,8 @@ grub_ieee1275_net_config_real (const char *devpath, char **device, char **path)

       }

     grub_free (canon);

+    grub_ieee1275_parse_bootpath (devpath, bootpath, device, &card;;

+

     for (i = 0; i < ARRAY_SIZE (bootp_response_properties); i++)

       if (grub_ieee1275_get_property_length (grub_ieee1275_chosen,

 					     bootp_response_properties[i].name,

diff --git a/include/grub/ieee1275/ieee1275.h b/include/grub/ieee1275/ieee1275.h

index dc54beabb4b..8e425130327 100644

--- a/include/grub/ieee1275/ieee1275.h

+++ b/include/grub/ieee1275/ieee1275.h

@@ -70,8 +70,9 @@ struct grub_ieee1275_devalias

 };

 extern void (*EXPORT_VAR(grub_ieee1275_net_config)) (const char *dev,

-						     char **device,

-						     char **path);

+                                                     char **device,

+                                                     char **path,

+                                                     char *bootargs);

 /* Maps a device alias to a pathname.  */

 extern grub_ieee1275_phandle_t EXPORT_VAR(grub_ieee1275_chosen);

diff --git a/ChangeLog b/ChangeLog

index 63f5aa322c3..5237631583a 100644

--- a/ChangeLog

+++ b/ChangeLog

@@ -1,3 +1,16 @@

+2014-02-04  Paulo Flabiano Smorigo  <pfsmorigo@br.ibm.com>

+

+	Add bootpath parser for open firmware.

+

+	It enables net boot even when there is no bootp/dhcp server.

+

+	* grub-core/net/drivers/ieee1275/ofnet.c: Add grub_ieee1275_parse_bootpath

+	and call it at grub_ieee1275_net_config_real.

+	* grub-core/kern/ieee1275/init.c: Add bootpath to

+	grub_ieee1275_net_config.

+	* include/grub/ieee1275/ieee1275.h: Likewise.

+

+

 2014-02-04  Paulo Flabiano Smorigo  <pfsmorigo@br.ibm.com>

 	Add grub_env_set_net_property function.