1 files changed, 139 insertions, 0 deletions
diff --git a/sys-boot/grub/files/ubuntu-upstream-1.98/956_loopback_root.diff b/sys-boot/grub/files/ubuntu-upstream-1.98/956_loopback_root.diff
new file mode 100644
index 00000000..ce54872e
--- /dev/null
+++ b/sys-boot/grub/files/ubuntu-upstream-1.98/956_loopback_root.diff
@@ -0,0 +1,139 @@
+Upstream: http://lists.gnu.org/archive/html/grub-devel/2009-09/msg00210.html
+Description: If you set root after running loopback, any attempts to open
+ files on the loopback device resolve the loopback file name relative to the
+ *new* root, not the root at the time loopback was invoked, and so the above
+ recurses until it runs out of stack. This causes problems for Wubi. I think
+ it's fairly clear that only the root that was in place when you ran
+ loopback should be relevant to the loopback file name.
+
+diff -Nur -x '*.orig' -x '*~' grub2-1.97~beta2/disk/loopback.c grub2-1.97~beta2.new/disk/loopback.c
+--- grub2-1.97~beta2/disk/loopback.c	2009-06-10 22:04:23.000000000 +0100
++++ grub2-1.97~beta2.new/disk/loopback.c	2009-09-10 21:42:56.000000000 +0100
+@@ -28,6 +28,7 @@
+ {
+   char *devname;
+   char *filename;
++  grub_file_t file;
+   int has_partitions;
+   struct grub_loopback *next;
+ };
+@@ -61,6 +62,7 @@
+   /* Remove the device from the list.  */
+   *prev = dev->next;
+ 
++  grub_file_close (dev->file);
+   grub_free (dev->devname);
+   grub_free (dev->filename);
+   grub_free (dev);
+@@ -90,9 +92,6 @@
+   if (! file)
+     return grub_errno;
+ 
+-  /* Close the file, the only reason for opening it is validation.  */
+-  grub_file_close (file);
+-
+   /* First try to replace the old device.  */
+   for (newdev = loopback_list; newdev; newdev = newdev->next)
+     if (grub_strcmp (newdev->devname, args[0]) == 0)
+@@ -102,10 +101,12 @@
+     {
+       char *newname = grub_strdup (args[1]);
+       if (! newname)
+-	return grub_errno;
++	goto fail;
+ 
+       grub_free (newdev->filename);
+       newdev->filename = newname;
++      grub_file_close (newdev->file);
++      newdev->file = file;
+ 
+       /* Set has_partitions when `--partitions' was used.  */
+       newdev->has_partitions = state[1].set;
+@@ -116,13 +117,13 @@
+   /* Unable to replace it, make a new entry.  */
+   newdev = grub_malloc (sizeof (struct grub_loopback));
+   if (! newdev)
+-    return grub_errno;
++    goto fail;
+ 
+   newdev->devname = grub_strdup (args[0]);
+   if (! newdev->devname)
+     {
+       grub_free (newdev);
+-      return grub_errno;
++      goto fail;
+     }
+ 
+   newdev->filename = grub_strdup (args[1]);
+@@ -130,9 +131,11 @@
+     {
+       grub_free (newdev->devname);
+       grub_free (newdev);
+-      return grub_errno;
++      goto fail;
+     }
+ 
++  newdev->file = file;
++
+   /* Set has_partitions when `--partitions' was used.  */
+   newdev->has_partitions = state[1].set;
+ 
+@@ -141,6 +144,10 @@
+   loopback_list = newdev;
+ 
+   return 0;
++
++fail:
++  grub_file_close (file);
++  return grub_errno;
+ }
+ 
+ 
+@@ -159,7 +166,6 @@
+ static grub_err_t
+ grub_loopback_open (const char *name, grub_disk_t disk)
+ {
+-  grub_file_t file;
+   struct grub_loopback *dev;
+ 
+   for (dev = loopback_list; dev; dev = dev->next)
+@@ -169,29 +175,17 @@
+   if (! dev)
+     return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "Can't open device");
+ 
+-  file = grub_file_open (dev->filename);
+-  if (! file)
+-    return grub_errno;
+-
+   /* Use the filesize for the disk size, round up to a complete sector.  */
+-  disk->total_sectors = ((file->size + GRUB_DISK_SECTOR_SIZE - 1)
++  disk->total_sectors = ((dev->file->size + GRUB_DISK_SECTOR_SIZE - 1)
+ 			 / GRUB_DISK_SECTOR_SIZE);
+   disk->id = (unsigned long) dev;
+ 
+   disk->has_partitions = dev->has_partitions;
+-  disk->data = file;
++  disk->data = dev->file;
+ 
+   return 0;
+ }
+ 
+-static void
+-grub_loopback_close (grub_disk_t disk)
+-{
+-  grub_file_t file = (grub_file_t) disk->data;
+-
+-  grub_file_close (file);
+-}
+-
+ static grub_err_t
+ grub_loopback_read (grub_disk_t disk, grub_disk_addr_t sector,
+ 		    grub_size_t size, char *buf)
+@@ -233,7 +227,6 @@
+     .id = GRUB_DISK_DEVICE_LOOPBACK_ID,
+     .iterate = grub_loopback_iterate,
+     .open = grub_loopback_open,
+-    .close = grub_loopback_close,
+     .read = grub_loopback_read,
+     .write = grub_loopback_write,
+     .next = 0