[parted-devel] [PATCH] Initial btrfs support, only recognize it for now
Joel Granados
jgranado at redhat.com
Fri Feb 13 13:23:15 UTC 2009
Still a lot of work to be done I guess. Its a very good idea implment this early, this will increase btrfs testing and such. Guess this is a good candidate for the master branch
----- "Luca Bruno" <lucab at debian.org> wrote:
> 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 at debian.org>
> ---
> configure.ac | 1 +
> libparted/fs/Makefile.am | 5 +-
> libparted/fs/btrfs/Makefile.am | 8 +++
> libparted/fs/btrfs/btrfs.c | 102
> ++++++++++++++++++++++++++++++++++++++++
> libparted/libparted.c | 4 ++
> 5 files changed, 118 insertions(+), 2 deletions(-)
>
> diff --git a/configure.ac b/configure.ac
> index 65ddedc..26ce84a 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -524,6 +524,7 @@ 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
> diff --git a/libparted/fs/Makefile.am b/libparted/fs/Makefile.am
> index 96a5744..365ba7b 100644
> --- a/libparted/fs/Makefile.am
> +++ b/libparted/fs/Makefile.am
> @@ -3,7 +3,7 @@
> #
> # This file may be modified and/or distributed without restriction.
>
> -SUBDIRS = amiga ext2 ufs fat ntfs hfs linux_swap xfs jfs
> reiserfs # bfs
> +SUBDIRS = amiga ext2 ufs fat ntfs hfs linux_swap xfs jfs
> reiserfs btrfs # bfs
>
> partedincludedir = -I$(top_srcdir)/include
> noinst_LTLIBRARIES = libfs.la
> @@ -23,7 +23,8 @@ libfs_la_LIBADD = $(UUID_LIBS) \
> linux_swap/liblinuxswap.la \
> xfs/libxfs.la \
> jfs/libjfs.la \
> - reiserfs/libreiserfs.la
> + reiserfs/libreiserfs.la \
> + btrfs/libbtrfs.la
> # bfs/libbfs.la
>
> libfs_la_SOURCES =
> diff --git a/libparted/fs/btrfs/Makefile.am
> b/libparted/fs/btrfs/Makefile.am
> new file mode 100644
> index 0000000..a9428da
> --- /dev/null
> +++ b/libparted/fs/btrfs/Makefile.am
> @@ -0,0 +1,8 @@
> +partedincludedir = -I$(top_srcdir)/include
> +
> +noinst_LTLIBRARIES = libbtrfs.la
> +libbtrfs_la_SOURCES = btrfs.c
> +
> +INCLUDES = $(partedincludedir) $(INTLINCS)
> +
> +MAINTAINERCLEANFILES = Makefile.in
> diff --git a/libparted/fs/btrfs/btrfs.c b/libparted/fs/btrfs/btrfs.c
> new file mode 100644
> index 0000000..7af101f
> --- /dev/null
> +++ b/libparted/fs/btrfs/btrfs.c
> @@ -0,0 +1,102 @@
> +/*
> + libparted - a library for manipulating disk partitions
> + Copyright (C) 2000, 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 "_BHRfS_M"
> +
> +static PedGeometry*
> +btrfs_probe (PedGeometry* geom)
> +{
> + char buf[BTRFS_SUPER_INFO_SIZE];
> +
> + if (!ped_geometry_read (geom, buf, (BTRFS_SUPER_INFO_OFFSET / 512),
> (BTRFS_SUPER_INFO_SIZE / 512)))
> + return 0;
> +
> + if (strncmp (BTRFS_SIGNATURE, buf + 64, strlen (BTRFS_SIGNATURE)) ==
> 0)
> + 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);
> +}
> +
> +
> diff --git a/libparted/libparted.c b/libparted/libparted.c
> index 023153d..6384598 100644
> --- a/libparted/libparted.c
> +++ b/libparted/libparted.c
> @@ -109,6 +109,7 @@ extern void ped_file_system_jfs_init (void);
> extern void ped_file_system_hfs_init (void);
> extern void ped_file_system_fat_init (void);
> extern void ped_file_system_ext2_init (void);
> +extern void ped_file_system_btrfs_init (void);
>
> static void
> init_file_system_types ()
> @@ -123,6 +124,7 @@ init_file_system_types ()
> ped_file_system_hfs_init ();
> ped_file_system_fat_init ();
> ped_file_system_ext2_init ();
> + ped_file_system_btrfs_init ();
> }
> #endif /* ENABLE_FS */
>
> @@ -188,6 +190,7 @@ extern void ped_file_system_ntfs_done (void);
> 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
> @@ -202,6 +205,7 @@ 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 */
>
> _______________________________________________
> parted-devel mailing list
> parted-devel at lists.alioth.debian.org
> http://lists.alioth.debian.org/mailman/listinfo/parted-devel
--
Joel Andres Granados
Red Hat / Brno Czech Republic
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