168 lines
4.6 KiB
Diff
168 lines
4.6 KiB
Diff
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commit 85e5fcd1bb0fe91d8908e8a638e9827979b6feff
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Author: Luca Bruno <lucab@debian.org>
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Date: Thu Feb 12 15:15:30 2009 +0100
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Initial btrfs support, only recognize it for now
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Add initial btrfs support to libparted; just discovering
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the declared magic entry at the right place to recognize
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filesystem type, for the moment.
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Signed-off-by: Luca Bruno <lucab@debian.org>
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---
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libparted/fs/Makefile.am | 1
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libparted/fs/btrfs/btrfs.c | 96 ++
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libparted/libparted.c | 4
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4 files changed, 1933 insertions(+)
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Index: parted-3.1/libparted/fs/Makefile.am
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===================================================================
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--- parted-3.1.orig/libparted/fs/Makefile.am
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+++ parted-3.1/libparted/fs/Makefile.am
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@@ -25,6 +25,7 @@ libfs_la_SOURCES = \
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amiga/asfs.c \
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amiga/asfs.h \
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amiga/a-interface.c \
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+ btrfs/btrfs.c \
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ext2/ext2.h \
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ext2/ext2_fs.h \
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ext2/interface.c \
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Index: parted-3.1/libparted/fs/btrfs/btrfs.c
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===================================================================
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--- /dev/null
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+++ parted-3.1/libparted/fs/btrfs/btrfs.c
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@@ -0,0 +1,96 @@
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+/*
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+ libparted - a library for manipulating disk partitions
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+ Copyright (C) 2009 Free Software Foundation, Inc.
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+
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+ This program is free software; you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
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+ the Free Software Foundation; either version 3 of the License, or
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+ (at your option) any later version.
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+
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+ This program is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
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+
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+ You should have received a copy of the GNU General Public License
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+ along with this program. If not, see <http://www.gnu.org/licenses/>.
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+*/
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+
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+#include <config.h>
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+
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+#include <parted/parted.h>
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+#include <parted/endian.h>
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+
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+#if ENABLE_NLS
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+# include <libintl.h>
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+# define _(String) dgettext (PACKAGE, String)
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+#else
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+# define _(String) (String)
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+#endif /* ENABLE_NLS */
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+
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+#include <unistd.h>
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+
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+#define BTRFS_BLOCK_SIZES ((int[2]){1024, 0})
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+#define BTRFS_SUPER_INFO_SIZE 4096
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+#define BTRFS_SUPER_INFO_OFFSET (64 * 1024)
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+
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+//Should be definitive, as of v0.18
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+#define BTRFS_SIGNATURE 0x4D5F53665248425F
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+
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+static PedGeometry*
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+btrfs_probe (PedGeometry* geom)
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+{
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+ char buf[BTRFS_SUPER_INFO_SIZE];
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+
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+ uint64_t magic;
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+
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+ if (!ped_geometry_read (geom, buf,
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+ (BTRFS_SUPER_INFO_OFFSET / 512),
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+ (BTRFS_SUPER_INFO_SIZE / 512)))
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+ return 0;
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+
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+ memcpy(&magic, buf + 64, sizeof(uint64_t));
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+
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+ if (magic == PED_CPU_TO_LE64(BTRFS_SIGNATURE))
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+ return ped_geometry_new (geom->dev, geom->start, geom->length);
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+ else
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+ return NULL;
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+}
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+
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+#ifndef DISCOVER_ONLY
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+static int
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+btrfs_clobber (PedGeometry* geom)
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+{
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+ char buf[BTRFS_SUPER_INFO_SIZE];
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+
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+ memset (buf, 0, BTRFS_SUPER_INFO_SIZE);
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+ return ped_geometry_write (geom, buf,
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+ (BTRFS_SUPER_INFO_OFFSET / 512),
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+ (BTRFS_SUPER_INFO_SIZE / 512));
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+}
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+#endif /* !DISCOVER_ONLY */
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+
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+static PedFileSystemOps btrfs_ops = {
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+ probe: btrfs_probe,
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+};
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+
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+static PedFileSystemType btrfs_type = {
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+ next: NULL,
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+ ops: &btrfs_ops,
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+ name: "btrfs",
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+ block_sizes: BTRFS_BLOCK_SIZES
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+};
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+
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+void
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+ped_file_system_btrfs_init ()
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+{
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+ ped_file_system_type_register (&btrfs_type);
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+}
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+
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+void
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+ped_file_system_btrfs_done ()
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+{
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+ ped_file_system_type_unregister (&btrfs_type);
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+}
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+
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+
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Index: parted-3.1/libparted/libparted.c
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===================================================================
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--- parted-3.1.orig/libparted/libparted.c
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+++ parted-3.1/libparted/libparted.c
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@@ -109,6 +109,7 @@ extern void ped_file_system_hfs_init (vo
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extern void ped_file_system_fat_init (void);
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extern void ped_file_system_ext2_init (void);
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extern void ped_file_system_nilfs2_init (void);
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+extern void ped_file_system_btrfs_init (void);
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static void
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init_file_system_types ()
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@@ -124,6 +125,7 @@ init_file_system_types ()
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ped_file_system_fat_init ();
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ped_file_system_ext2_init ();
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ped_file_system_nilfs2_init ();
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+ ped_file_system_btrfs_init ();
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}
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extern void ped_disk_aix_done ();
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@@ -185,6 +187,7 @@ extern void ped_file_system_ntfs_done (v
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extern void ped_file_system_reiserfs_done (void);
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extern void ped_file_system_ufs_done (void);
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extern void ped_file_system_xfs_done (void);
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+extern void ped_file_system_btrfs_done (void);
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extern void ped_file_system_amiga_done (void);
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static void
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@@ -200,6 +203,7 @@ done_file_system_types ()
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ped_file_system_reiserfs_done ();
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ped_file_system_ufs_done ();
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ped_file_system_xfs_done ();
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+ ped_file_system_btrfs_done ();
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ped_file_system_amiga_done ();
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}
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