grub2/0001-Add-bootargs-parser-for-open-firmware.patch

From 0787fba15352ef47958e0c9fcc912b8bbcf8ab4e Mon Sep 17 00:00:00 2001
From: Paulo Flabiano Smorigo <pfsmorigo@linux.vnet.ibm.com>
Date: Mon, 30 Jun 2014 10:31:59 -0300
Subject: [PATCH 1/2] Add bootargs parser for open firmware.

It enables net boot even when there is no bootp/dhcp server.
---
 ChangeLog                              |  16 +++++
 grub-core/kern/ieee1275/init.c         |   7 +--
 grub-core/net/bootp.c                  |  63 +++++--------------
 grub-core/net/drivers/ieee1275/ofnet.c | 107 ++++++++++++++++++++++++++++++++-
 grub-core/net/net.c                    |  38 ++++++++++++
 include/grub/ieee1275/ieee1275.h       |   3 +-
 include/grub/net.h                     |   4 ++
 7 files changed, 185 insertions(+), 53 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 41bcebf..a659369 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,19 @@
+2014-01-24  Paulo Flabiano Smorigo  <pfsmorigo@br.ibm.com>
+
+	Add bootargs 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_bootargs
+	and call it at grub_ieee1275_net_config_real.
+
+2013-12-23  Paulo Flabiano Smorigo  <pfsmorigo@br.ibm.com>
+
+	Add grub_env_set_net_property function.
+
+	* grub-core/net/bootp.c: Remove set_env_limn_ro.
+	* grub-core/net/net.c: Add grub_env_set_net_property.
+
 2013-12-24  Vladimir Serbinenko  <phcoder@gmail.com>
 
 	* configure.ac: Set version to 2.02~beta2.
diff --git a/grub-core/kern/ieee1275/init.c b/grub-core/kern/ieee1275/init.c
index 89b2822..d5bd74d 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/bootp.c b/grub-core/net/bootp.c
index c14e9de..6310ed4 100644
--- a/grub-core/net/bootp.c
+++ b/grub-core/net/bootp.c
@@ -25,41 +25,6 @@
 #include <grub/net/udp.h>
 #include <grub/datetime.h>
 
-static char *
-grub_env_write_readonly (struct grub_env_var *var __attribute__ ((unused)),
-			 const char *val __attribute__ ((unused)))
-{
-  return NULL;
-}
-
-static void
-set_env_limn_ro (const char *intername, const char *suffix,
-		 const char *value, grub_size_t len)
-{
-  char *varname, *varvalue;
-  char *ptr;
-  varname = grub_xasprintf ("net_%s_%s", intername, suffix);
-  if (!varname)
-    return;
-  for (ptr = varname; *ptr; ptr++)
-    if (*ptr == ':')
-      *ptr = '_';
-  varvalue = grub_malloc (len + 1);
-  if (!varvalue)
-    {
-      grub_free (varname);
-      return;
-    }
-
-  grub_memcpy (varvalue, value, len);
-  varvalue[len] = 0;
-  grub_env_set (varname, varvalue);
-  grub_register_variable_hook (varname, 0, grub_env_write_readonly);
-  grub_env_export (varname);
-  grub_free (varname);
-  grub_free (varvalue);
-}
-
 static void
 parse_dhcp_vendor (const char *name, const void *vend, int limit, int *mask)
 {
@@ -136,20 +101,24 @@ parse_dhcp_vendor (const char *name, const void *vend, int limit, int *mask)
 	  }
 	  continue;
 	case GRUB_NET_BOOTP_HOSTNAME:
-	  set_env_limn_ro (name, "hostname", (const char *) ptr, taglength);
-	  break;
+          grub_env_set_net_property (name, "hostname", (const char *) ptr,
+                                     taglength);
+          break;
 
 	case GRUB_NET_BOOTP_DOMAIN:
-	  set_env_limn_ro (name, "domain", (const char *) ptr, taglength);
-	  break;
+          grub_env_set_net_property (name, "domain", (const char *) ptr,
+                                     taglength);
+          break;
 
 	case GRUB_NET_BOOTP_ROOT_PATH:
-	  set_env_limn_ro (name, "rootpath", (const char *) ptr, taglength);
-	  break;
+          grub_env_set_net_property (name, "rootpath", (const char *) ptr,
+                                     taglength);
+          break;
 
 	case GRUB_NET_BOOTP_EXTENSIONS_PATH:
-	  set_env_limn_ro (name, "extensionspath", (const char *) ptr, taglength);
-	  break;
+          grub_env_set_net_property (name, "extensionspath", (const char *) ptr,
+                                     taglength);
+          break;
 
 	  /* If you need any other options please contact GRUB
 	     development team.  */
@@ -211,8 +180,8 @@ grub_net_configure_by_dhcp_ack (const char *name,
     }
 
   if (size > OFFSET_OF (boot_file, bp))
-    set_env_limn_ro (name, "boot_file", (char *) bp->boot_file,
-		     sizeof (bp->boot_file));
+    grub_env_set_net_property (name, "boot_file", bp->boot_file,
+                               sizeof (bp->boot_file));
   if (is_def)
     grub_net_default_server = 0;
   if (is_def && !grub_net_default_server && bp->server_ip)
@@ -243,8 +212,8 @@ grub_net_configure_by_dhcp_ack (const char *name,
   if (size > OFFSET_OF (server_name, bp)
       && bp->server_name[0])
     {
-      set_env_limn_ro (name, "dhcp_server_name", (char *) bp->server_name,
-		       sizeof (bp->server_name));
+      grub_env_set_net_property (name, "dhcp_server_name", bp->server_name,
+                                 sizeof (bp->server_name));
       if (is_def && !grub_net_default_server)
 	{
 	  grub_net_default_server = grub_strdup (bp->server_name);
diff --git a/grub-core/net/drivers/ieee1275/ofnet.c b/grub-core/net/drivers/ieee1275/ofnet.c
index ceb5931..a079065 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_bootargs (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_bootargs (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/grub-core/net/net.c b/grub-core/net/net.c
index 0e57e93..8f9d183 100644
--- a/grub-core/net/net.c
+++ b/grub-core/net/net.c
@@ -1480,6 +1480,44 @@ receive_packets (struct grub_net_card *card, int *stop_condition)
   grub_print_error ();
 }
 
+static char *
+grub_env_write_readonly (struct grub_env_var *var __attribute__ ((unused)),
+			 const char *val __attribute__ ((unused)))
+{
+  return NULL;
+}
+
+grub_err_t
+grub_env_set_net_property (const char *intername, const char *suffix,
+                           const char *value, grub_size_t len)
+{
+  char *varname, *varvalue;
+  char *ptr;
+
+  varname = grub_xasprintf ("net_%s_%s", intername, suffix);
+  if (!varname)
+    return grub_errno;
+  for (ptr = varname; *ptr; ptr++)
+    if (*ptr == ':')
+      *ptr = '_';
+  varvalue = grub_malloc (len + 1);
+  if (!varvalue)
+    {
+      grub_free (varname);
+      return grub_errno;
+    }
+
+  grub_memcpy (varvalue, value, len);
+  varvalue[len] = 0;
+  grub_err_t ret = grub_env_set (varname, varvalue);
+  grub_register_variable_hook (varname, 0, grub_env_write_readonly);
+  grub_env_export (varname);
+  grub_free (varname);
+  grub_free (varvalue);
+
+  return ret;
+}
+
 void
 grub_net_poll_cards (unsigned time, int *stop_condition)
 {
diff --git a/include/grub/ieee1275/ieee1275.h b/include/grub/ieee1275/ieee1275.h
index 7fefd16..f8b3d79 100644
--- a/include/grub/ieee1275/ieee1275.h
+++ b/include/grub/ieee1275/ieee1275.h
@@ -73,7 +73,8 @@ struct grub_ieee1275_devalias
 
 extern void (*EXPORT_VAR(grub_ieee1275_net_config)) (const char *dev,
 						     char **device,
-						     char **path);
+						     char **path,
+                                                     char *bootargs);
 
 /* Maps a device alias to a pathname.  */
 extern grub_ieee1275_phandle_t EXPORT_VAR(grub_ieee1275_chosen);
diff --git a/include/grub/net.h b/include/grub/net.h
index de6259e..843f74f 100644
--- a/include/grub/net.h
+++ b/include/grub/net.h
@@ -480,6 +480,10 @@ grub_net_addr_to_str (const grub_net_network_level_address_t *target,
 void
 grub_net_hwaddr_to_str (const grub_net_link_level_address_t *addr, char *str);
 
+grub_err_t
+grub_env_set_net_property (const char *intername, const char *suffix,
+                           const char *value, grub_size_t len);
+
 void
 grub_net_poll_cards (unsigned time, int *stop_condition);
 
-- 
1.9.3