diff options
author | Christophe Grenier <grenier@cgsecurity.org> | 2011-03-05 18:40:22 +0100 |
---|---|---|
committer | Christophe Grenier <grenier@cgsecurity.org> | 2011-03-05 18:40:22 +0100 |
commit | f2c0943a5a5d2de868a6cfefa8b2c7386b8c5393 (patch) | |
tree | 067af5958b2777c67cc7811390d04f0cdc2e0675 /src/btrfs.c | |
parent | 237b0d53ac0d638ccbd8671293b6695436bad32c (diff) |
TestDisk: recover btrfs, a GPL-licensed copy-on-write file system for Linux.
Diffstat (limited to 'src/btrfs.c')
-rw-r--r-- | src/btrfs.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/btrfs.c b/src/btrfs.c new file mode 100644 index 0000000..d99b8f4 --- /dev/null +++ b/src/btrfs.c @@ -0,0 +1,124 @@ +/* + + File: btrfs.c + + Copyright (C) 2011 Christophe GRENIER <grenier@cgsecurity.org> + + This software 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 2 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, write the Free Software Foundation, Inc., 51 + Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + + */ +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#ifdef HAVE_STDLIB_H +#include <stdlib.h> +#endif +#ifdef HAVE_STRING_H +#include <string.h> +#endif +#include "types.h" +#include "common.h" +#include "btrfs.h" +#include "fnctdsk.h" +#include "log.h" +#include "guid_cpy.h" + +static int set_btrfs_info(const struct btrfs_super_block *sb, partition_t *partition, const int verbose); +static int test_btrfs(const struct btrfs_super_block *sb, partition_t *partition); + +int check_btrfs(disk_t *disk_car,partition_t *partition,const int verbose) +{ + unsigned char *buffer=(unsigned char*)MALLOC(BTRFS_SUPER_INFO_SIZE); + if(disk_car->pread(disk_car, buffer, BTRFS_SUPER_INFO_SIZE, partition->part_offset + BTRFS_SUPER_INFO_OFFSET) != BTRFS_SUPER_INFO_SIZE) + { + free(buffer); + return 1; + } + if(test_btrfs((struct btrfs_super_block*)buffer, partition)!=0) + { + free(buffer); + return 1; + } + set_btrfs_info((struct btrfs_super_block*)buffer, partition, verbose); + free(buffer); + return 0; +} + +static int set_btrfs_info(const struct btrfs_super_block *sb, partition_t *partition, const int verbose) +{ + set_part_name(partition, sb->label, sizeof(partition->partname)); + strncpy(partition->info,"btrfs",sizeof(partition->info)); + if(le64(sb->bytenr)!=partition->part_offset + BTRFS_SUPER_INFO_OFFSET) + { + strcat(partition->info," Backup superblock"); + } + /* last mounted => date */ + return 0; +} + +/* +Primary superblock is at 1024 (SUPERBLOCK_OFFSET) +Group 0 begin at s_first_data_block +*/ +int recover_btrfs(disk_t *disk, const struct btrfs_super_block *sb, partition_t *partition, const int verbose, const int dump_ind) +{ + if(test_btrfs(sb, partition)!=0) + return 1; + if(dump_ind!=0) + { + if(partition!=NULL && disk!=NULL) + log_info("\nbtrfs magic value at %u/%u/%u\n", + offset2cylinder(disk,partition->part_offset), + offset2head(disk,partition->part_offset), + offset2sector(disk,partition->part_offset)); + dump_log(sb, BTRFS_SUPER_INFO_SIZE); + } + if(partition==NULL) + return 0; + set_btrfs_info(sb, partition, verbose); + partition->part_type_i386=P_LINUX; + partition->part_type_mac=PMAC_LINUX; + partition->part_type_sun=PSUN_LINUX; + partition->part_type_gpt=GPT_ENT_TYPE_LINUX_DATA; + partition->part_size=(uint64_t)le64(sb->dev_item.total_bytes); + partition->blocksize=le32(sb->dev_item.sector_size); + guid_cpy(&partition->part_uuid, (const efi_guid_t *)&sb->fsid); + if(verbose>0) + { + log_info("\n"); + } + partition->sborg_offset=BTRFS_SUPER_INFO_OFFSET; + partition->sb_size=BTRFS_SUPER_INFO_SIZE; + if(verbose>0) + { + if(disk==NULL) + log_info("recover_btrfs: part_size %lu\n", (long unsigned)(partition->part_size / le32(sb->dev_item.sector_size))); + else + log_info("recover_btrfs: part_size %lu\n", (long unsigned)(partition->part_size / disk->sector_size)); + } + return 0; +} + +static int test_btrfs(const struct btrfs_super_block *sb, partition_t *partition) +{ + if(memcmp(&sb->magic, BTRFS_MAGIC, 8)!=0) + return 1; + if(le32(sb->dev_item.sector_size)==0) + return 1; + partition->upart_type=UP_BTRFS; + return 0; +} |