From ed7593907d63d92a3f145e3b573228dc2056571d Mon Sep 17 00:00:00 2001
From: proski <proski@localhost>
Date: Wed, 7 May 2008 20:46:57 +0000
Subject: [PATCH] 2008-05-07  Ian Campbell  <ijc@hellion.org.uk>

	* util/biosdisk.c (get_os_disk): Recognise xvd type disks.
	* util/grub-mkdevicemap.c (get_xvd_disk_name): New function.
	(make_device_map): Output entries for xvd type disks.
---
 ChangeLog               |  6 ++++++
 util/biosdisk.c         |  8 ++++++++
 util/grub-mkdevicemap.c | 22 ++++++++++++++++++++++
 3 files changed, 36 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 7570f79b1..6a8e341c8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-05-07  Ian Campbell  <ijc@hellion.org.uk>
+
+	* util/biosdisk.c (get_os_disk): Recognise xvd type disks.
+	* util/grub-mkdevicemap.c (get_xvd_disk_name): New function.
+	(make_device_map): Output entries for xvd type disks.
+
 2008-05-07  Robert Millan  <rmh@aybabtu.com>
 
 	* util/biosdisk.c (linux_find_partition, get_os_disk): Handle CCISS
diff --git a/util/biosdisk.c b/util/biosdisk.c
index 3b8b9e089..c4ee7c14a 100644
--- a/util/biosdisk.c
+++ b/util/biosdisk.c
@@ -677,6 +677,14 @@ get_os_disk (const char *os_dev)
 	  p[3] = '\0';
 	  return path;
 	}
+
+      /* If this is a Xen virtual block device.  */
+      if ((strncmp ("xvd", p, 3) == 0) && p[3] >= 'a' && p[3] <= 'z')
+	{
+	  /* /dev/xvd[a-z][0-9]* */
+	  p[4] = '\0';
+	  return path;
+	}
     }
 
   return path;
diff --git a/util/grub-mkdevicemap.c b/util/grub-mkdevicemap.c
index 12729812a..19d6747bf 100644
--- a/util/grub-mkdevicemap.c
+++ b/util/grub-mkdevicemap.c
@@ -289,6 +289,12 @@ get_cciss_disk_name (char *name, int controller, int drive)
 {
   sprintf (name, "/dev/cciss/c%dd%d", controller, drive);
 }
+
+static void
+get_xvd_disk_name (char *name, int unit)
+{
+  sprintf (name, "/dev/xvd%c", unit + 'a');
+}
 #endif
 
 /* Check if DEVICE can be read. If an error occurs, return zero,
@@ -464,6 +470,22 @@ make_device_map (const char *device_map, int floppy_disks)
           num_hd++;
         }
     }
+
+  /* Xen virtual block devices.  */
+  for (i = 0; i < 16; i++)
+    {
+      char name[16];
+
+      get_xvd_disk_name (name, i);
+      if (check_device (name))
+	{
+	  char *p;
+	  p = grub_util_get_disk_name (num_hd, name);
+	  fprintf (fp, "(%s)\t%s\n", p, name);
+	  free (p);
+	  num_hd++;
+	}
+    }
 #endif /* __linux__ */
 
   /* The rest is SCSI disks.  */