Date: Sat, 31 May 2008 23:52:30 +0200
From: Robert Millan <rmh@aybabtu.com>
To: grub-devel@gnu.org
Message-ID: <20080531215230.GA19893@thorin>
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Organization: free as in freedom
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Subject: [PATCH] reiserfs & xfs UUIDs
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Reply-To: The development of GRUB 2 <grub-devel@gnu.org>


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This patch adds support for UUIDs on reiserfs and xfs.

-- 
Robert Millan

<GPLv2> I know my rights; I want my phone call!
<DRM> What good is a phone call… if you are unable to speak?
(as seen on /.)

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2008-05-31  Robert Millan  <rmh@aybabtu.com>

	* fs/reiserfs.c (grub_reiserfs_superblock): Add `uuid' field.
	(grub_reiserfs_uuid): New function.
	(grub_reiserfs_fs): Reference grub_reiserfs_uuid() in `uuid' struct
	member.
	* fs/xfs.c (grub_xfs_sblock): Add `uuid' field.
	(grub_xfs_uuid): New function.
	(grub_xfs_fs): Reference grub_reiserfs_uuid() in `uuid' struct member.

diff -x configure -x config.h.in -x CVS -x '*~' -x '*.mk' -urp ../grub2/fs/reiserfs.c ./fs/reiserfs.c
--- ../grub2/fs/reiserfs.c	2008-05-28 15:41:57.000000000 +0200
+++ ./fs/reiserfs.c	2008-05-31 23:47:45.000000000 +0200
@@ -108,6 +108,8 @@ struct grub_reiserfs_superblock
   grub_uint16_t version;
   grub_uint16_t reserved;
   grub_uint32_t inode_generation;
+  grub_uint8_t unused[4];
+  grub_uint16_t uuid[8];
 } __attribute__ ((packed));
 
 struct grub_reiserfs_journal_header
@@ -1468,6 +1470,38 @@ grub_reiserfs_label (grub_device_t devic
   return grub_errno;
 }
 
+static grub_err_t
+grub_reiserfs_uuid (grub_device_t device, char **uuid)
+{
+  struct grub_reiserfs_data *data;
+  grub_disk_t disk = device->disk;
+
+#ifndef GRUB_UTIL
+  grub_dl_ref (my_mod);
+#endif
+
+  data = grub_reiserfs_mount (disk);
+  if (data)
+    {
+      *uuid = grub_malloc (40 + sizeof ('\0'));
+      grub_sprintf (*uuid, "%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
+		    grub_be_to_cpu16 (data->superblock.uuid[0]), grub_be_to_cpu16 (data->superblock.uuid[1]),
+		    grub_be_to_cpu16 (data->superblock.uuid[2]), grub_be_to_cpu16 (data->superblock.uuid[3]),
+		    grub_be_to_cpu16 (data->superblock.uuid[4]), grub_be_to_cpu16 (data->superblock.uuid[5]),
+		    grub_be_to_cpu16 (data->superblock.uuid[6]), grub_be_to_cpu16 (data->superblock.uuid[7]));
+    }
+  else
+    *uuid = NULL;
+
+#ifndef GRUB_UTIL
+  grub_dl_unref (my_mod);
+#endif
+
+  grub_free (data);
+
+  return grub_errno;
+}
+
 static struct grub_fs grub_reiserfs_fs =
   {
     .name = "reiserfs",
@@ -1476,6 +1510,7 @@ static struct grub_fs grub_reiserfs_fs =
     .read = grub_reiserfs_read,
     .close = grub_reiserfs_close,
     .label = grub_reiserfs_label,
+    .uuid = grub_reiserfs_uuid,
     .next = 0
   };
 
diff -x configure -x config.h.in -x CVS -x '*~' -x '*.mk' -urp ../grub2/fs/xfs.c ./fs/xfs.c
--- ../grub2/fs/xfs.c	2008-05-29 15:02:13.000000000 +0200
+++ ./fs/xfs.c	2008-05-31 23:49:10.000000000 +0200
@@ -37,17 +37,19 @@ struct grub_xfs_sblock
 {
   grub_uint8_t magic[4];
   grub_uint32_t bsize;
-  grub_uint8_t unused1[48];
+  grub_uint8_t unused1[24];
+  grub_uint16_t uuid[8];
+  grub_uint8_t unused2[8];
   grub_uint64_t rootino;
-  grub_uint8_t unused2[20];
-  grub_uint32_t agsize; 
   grub_uint8_t unused3[20];
+  grub_uint32_t agsize; 
+  grub_uint8_t unused4[20];
   grub_uint8_t label[12];
   grub_uint8_t log2_bsize;
-  grub_uint8_t unused4[2];
+  grub_uint8_t unused5[2];
   grub_uint8_t log2_inop;
   grub_uint8_t log2_agblk;
-  grub_uint8_t unused5[67];
+  grub_uint8_t unused6[67];
   grub_uint8_t log2_dirblk;
 } __attribute__ ((packed));
 
@@ -763,6 +765,38 @@ grub_xfs_label (grub_device_t device, ch
   return grub_errno;
 }
 
+static grub_err_t
+grub_xfs_uuid (grub_device_t device, char **uuid)
+{
+  struct grub_xfs_data *data;
+  grub_disk_t disk = device->disk;
+
+#ifndef GRUB_UTIL
+  grub_dl_ref (my_mod);
+#endif
+
+  data = grub_xfs_mount (disk);
+  if (data)
+    {
+      *uuid = grub_malloc (40 + sizeof ('\0'));
+      grub_sprintf (*uuid, "%04x%04x-%04x-%04x-%04x-%04x%04x%04x",
+		    grub_be_to_cpu16 (data->sblock.uuid[0]), grub_be_to_cpu16 (data->sblock.uuid[1]),
+		    grub_be_to_cpu16 (data->sblock.uuid[2]), grub_be_to_cpu16 (data->sblock.uuid[3]),
+		    grub_be_to_cpu16 (data->sblock.uuid[4]), grub_be_to_cpu16 (data->sblock.uuid[5]),
+		    grub_be_to_cpu16 (data->sblock.uuid[6]), grub_be_to_cpu16 (data->sblock.uuid[7]));
+    }
+  else
+    *uuid = NULL;
+
+#ifndef GRUB_UTIL
+  grub_dl_unref (my_mod);
+#endif
+
+  grub_free (data);
+
+  return grub_errno;
+}
+
 
 
 static struct grub_fs grub_xfs_fs =
@@ -773,6 +807,7 @@ static struct grub_fs grub_xfs_fs =
     .read = grub_xfs_read,
     .close = grub_xfs_close,
     .label = grub_xfs_label,
+    .uuid = grub_xfs_uuid,
     .next = 0
   };
 

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