commit 85e5fcd1bb0fe91d8908e8a638e9827979b6feff Author: Luca Bruno 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 --- configure.ac | 4 - libparted/fs/Makefile.am | 3 - libparted/fs/btrfs/Makefile.am | 8 ++ libparted/fs/btrfs/btrfs.c | 110 +++++++++++++++++++++++++++++++++++++++++ libparted/libparted.c | 4 + 5 files changed, 126 insertions(+), 3 deletions(-) Index: parted-2.4/configure.ac =================================================================== @@ -626,6 +625,7 @@ libparted/Makefile libparted/labels/Makefile libparted/fs/Makefile libparted/fs/amiga/Makefile +libparted/fs/btrfs/Makefile libparted/fs/ext2/Makefile libparted/fs/fat/Makefile libparted/fs/hfs/Makefile Index: parted-2.4/libparted/fs/Makefile.am =================================================================== --- parted-2.4.orig/libparted/fs/Makefile.am +++ parted-2.4/libparted/fs/Makefile.am @@ -4,7 +4,7 @@ # This file may be modified and/or distributed without restriction. SUBDIRS = amiga ext2 ufs fat ntfs hfs linux_swap xfs jfs reiserfs \ - nilfs2 # bfs + nilfs2 btrfs # bfs partedincludedir = -I$(top_srcdir)/include noinst_LTLIBRARIES = libfs.la @@ -25,6 +25,7 @@ libfs_la_LIBADD = $(UUID_LIBS) \ xfs/libxfs.la \ jfs/libjfs.la \ reiserfs/libreiserfs.la \ + btrfs/libbtrfs.la \ nilfs2/libnilfs2.la # bfs/libbfs.la Index: parted-2.4/libparted/fs/btrfs/Makefile.am =================================================================== --- /dev/null +++ parted-2.4/libparted/fs/btrfs/Makefile.am @@ -0,0 +1,8 @@ +partedincludedir = -I$(top_srcdir)/include + +noinst_LTLIBRARIES = libbtrfs.la +libbtrfs_la_SOURCES = btrfs.c + +INCLUDES = $(partedincludedir) $(INTLINCS) + +MAINTAINERCLEANFILES = Makefile.in Index: parted-2.4/libparted/fs/btrfs/btrfs.c =================================================================== --- /dev/null +++ parted-2.4/libparted/fs/btrfs/btrfs.c @@ -0,0 +1,110 @@ +/* + 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 . +*/ + +#include + +#include +#include + +#if ENABLE_NLS +# include +# define _(String) dgettext (PACKAGE, String) +#else +# define _(String) (String) +#endif /* ENABLE_NLS */ + +#include + +#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, +#ifndef DISCOVER_ONLY + clobber: btrfs_clobber, +#else + clobber: NULL, +#endif + open: NULL, + create: NULL, + close: NULL, + check: NULL, + copy: NULL, + resize: NULL, + get_create_constraint: NULL, + get_resize_constraint: NULL, + get_copy_constraint: NULL +}; + +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-2.4/libparted/libparted.c =================================================================== --- parted-2.4.orig/libparted/libparted.c +++ parted-2.4/libparted/libparted.c @@ -110,6 +110,7 @@ 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 () @@ -125,6 +126,7 @@ init_file_system_types () ped_file_system_fat_init (); ped_file_system_ext2_init (); ped_file_system_nilfs2_init (); + ped_file_system_btrfs_init (); } #endif /* ENABLE_FS */ @@ -191,6 +193,7 @@ 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 @@ -206,6 +209,7 @@ 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 (); } #endif /* ENABLE_FS */