parted/parted-btrfs-support.patch

commit 85e5fcd1bb0fe91d8908e8a638e9827979b6feff
Author: Luca Bruno <lucab@debian.org>
Date:   Thu Feb 12 15:15:30 2009 +0100

    Initial btrfs support, only recognize it for now
    
    Add initial btrfs support to libparted; just discovering
    the declared magic entry at the right place to recognize
    filesystem type, for the moment.
    
    Signed-off-by: Luca Bruno <lucab@debian.org>

---
 libparted/fs/Makefile.am   |    1 
 libparted/fs/btrfs/btrfs.c |   96 ++
 libparted/libparted.c      |    4 
 4 files changed, 1933 insertions(+)

Index: parted-3.1/libparted/fs/Makefile.am
===================================================================
--- parted-3.1.orig/libparted/fs/Makefile.am
+++ parted-3.1/libparted/fs/Makefile.am
@@ -25,6 +25,7 @@ libfs_la_SOURCES =		\
   amiga/asfs.c			\
   amiga/asfs.h			\
   amiga/a-interface.c		\
+	btrfs/btrfs.c  \
   ext2/ext2.h			\
   ext2/ext2_fs.h		\
   ext2/interface.c		\
Index: parted-3.1/libparted/fs/btrfs/btrfs.c
===================================================================
--- /dev/null
+++ parted-3.1/libparted/fs/btrfs/btrfs.c
@@ -0,0 +1,96 @@
+/*
+    libparted - a library for manipulating disk partitions
+    Copyright (C) 2009 Free Software Foundation, Inc.
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <config.h>
+
+#include <parted/parted.h>
+#include <parted/endian.h>
+
+#if ENABLE_NLS
+#  include <libintl.h>
+#  define _(String) dgettext (PACKAGE, String)
+#else
+#  define _(String) (String)
+#endif /* ENABLE_NLS */
+
+#include <unistd.h>
+
+#define BTRFS_BLOCK_SIZES       ((int[2]){1024, 0})
+#define BTRFS_SUPER_INFO_SIZE 4096
+#define BTRFS_SUPER_INFO_OFFSET (64 * 1024)
+
+//Should be definitive, as of v0.18
+#define BTRFS_SIGNATURE        0x4D5F53665248425F
+
+static PedGeometry*
+btrfs_probe (PedGeometry* geom)
+{
+	char	buf[BTRFS_SUPER_INFO_SIZE];
+
+	uint64_t magic;
+
+	if (!ped_geometry_read (geom, buf,
+				(BTRFS_SUPER_INFO_OFFSET / 512),
+				(BTRFS_SUPER_INFO_SIZE / 512)))
+		return 0;
+
+	memcpy(&magic, buf + 64, sizeof(uint64_t));
+
+	if (magic == PED_CPU_TO_LE64(BTRFS_SIGNATURE))
+		return ped_geometry_new (geom->dev, geom->start, geom->length);
+	else
+		return NULL;
+}
+
+#ifndef DISCOVER_ONLY
+static int
+btrfs_clobber (PedGeometry* geom)
+{
+	char	buf[BTRFS_SUPER_INFO_SIZE];
+
+	memset (buf, 0, BTRFS_SUPER_INFO_SIZE);
+	return ped_geometry_write (geom, buf,
+				    (BTRFS_SUPER_INFO_OFFSET / 512),
+				    (BTRFS_SUPER_INFO_SIZE / 512));
+}
+#endif /* !DISCOVER_ONLY */
+
+static PedFileSystemOps btrfs_ops = {
+	probe:		btrfs_probe,
+};
+
+static PedFileSystemType btrfs_type = {
+	next:	NULL,
+	ops:	&btrfs_ops,
+	name:	"btrfs",
+	block_sizes: BTRFS_BLOCK_SIZES
+};
+
+void
+ped_file_system_btrfs_init ()
+{
+	ped_file_system_type_register (&btrfs_type);
+}
+
+void
+ped_file_system_btrfs_done ()
+{
+	ped_file_system_type_unregister (&btrfs_type);
+}
+
+
Index: parted-3.1/libparted/libparted.c
===================================================================
--- parted-3.1.orig/libparted/libparted.c
+++ parted-3.1/libparted/libparted.c
@@ -109,6 +109,7 @@ extern void ped_file_system_hfs_init (vo
 extern void ped_file_system_fat_init (void);
 extern void ped_file_system_ext2_init (void);
 extern void ped_file_system_nilfs2_init (void);
+extern void ped_file_system_btrfs_init (void);
 
 static void
 init_file_system_types ()
@@ -124,6 +125,7 @@ init_file_system_types ()
 	ped_file_system_fat_init ();
 	ped_file_system_ext2_init ();
 	ped_file_system_nilfs2_init ();
+	ped_file_system_btrfs_init ();
 }
 
 extern void ped_disk_aix_done ();
@@ -185,6 +187,7 @@ extern void ped_file_system_ntfs_done (v
 extern void ped_file_system_reiserfs_done (void);
 extern void ped_file_system_ufs_done (void);
 extern void ped_file_system_xfs_done (void);
+extern void ped_file_system_btrfs_done (void);
 extern void ped_file_system_amiga_done (void);
 
 static void
@@ -200,6 +203,7 @@ done_file_system_types ()
 	ped_file_system_reiserfs_done ();
 	ped_file_system_ufs_done ();
 	ped_file_system_xfs_done ();
+	ped_file_system_btrfs_done ();
 	ped_file_system_amiga_done ();
 }