diff options
author | Christophe Grenier <grenier@cgsecurity.org> | 2007-10-29 22:38:52 +0100 |
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committer | Christophe Grenier <grenier@cgsecurity.org> | 2007-10-29 22:38:52 +0100 |
commit | 9928d99936105b4653d2d1b8ca74dc3ffba5c71e (patch) | |
tree | 06aa4f5e9f0055027c6fb54dd47a8414cf2fba32 /src/rfs.c |
First version in git
Diffstat (limited to 'src/rfs.c')
-rw-r--r-- | src/rfs.c | 232 |
1 files changed, 232 insertions, 0 deletions
diff --git a/src/rfs.c b/src/rfs.c new file mode 100644 index 0000000..9f98c1b --- /dev/null +++ b/src/rfs.c @@ -0,0 +1,232 @@ +/* + + File: rfs.c + + Copyright (C) 1998-2007 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 + +#ifdef HAVE_STDLIB_H +#include <stdlib.h> +#endif +#ifdef HAVE_STRING_H +#include <string.h> +#endif +#include "types.h" +#include "common.h" +#include "rfs.h" +#include "fnctdsk.h" +#include "log.h" +#include "guid_cpy.h" + +static int set_rfs_info(const disk_t *disk_car, const struct reiserfs_super_block *sb,partition_t *partition, const int verbose, const int dump_ind); +static int test_rfs(const disk_t *disk_car, const struct reiserfs_super_block *sb,partition_t *partition,const int verbose, const int dump_ind); + +static int test_rfs4(const disk_t *disk_car, const struct reiser4_master_sb*sb,partition_t *partition,const int verbose, const int dump_ind); +static int set_rfs4_info(const disk_t *disk_car, const struct reiser4_master_sb*sb,partition_t *partition, const int verbose, const int dump_ind); + +int check_rfs(disk_t *disk_car,partition_t *partition,const int verbose) +{ + unsigned char *buffer=(unsigned char*)MALLOC(REISERFS_SUPER_BLOCK_SIZE); + if(disk_car->read(disk_car,REISERFS_SUPER_BLOCK_SIZE, buffer, partition->part_offset+128*512)!=0) /* 64k offset */ + { + free(buffer); + return 1; + } + if(test_rfs(disk_car,(struct reiserfs_super_block*)buffer,partition,verbose,0)==0) + { + set_rfs_info(disk_car,(struct reiserfs_super_block*)buffer,partition,verbose,0); + free(buffer); + return 0; + } + if(test_rfs4(disk_car,(struct reiser4_master_sb*)buffer,partition,verbose,0)==0) + { + set_rfs4_info(disk_car,(struct reiser4_master_sb*)buffer,partition,verbose,0); + free(buffer); + return 0; + } + free(buffer); + return 1; +} + +static int test_rfs(const disk_t *disk_car, const struct reiserfs_super_block *sb,partition_t *partition,const int verbose, const int dump_ind) +{ + if (memcmp(sb->s_magic,REISERFS_SUPER_MAGIC,sizeof(REISERFS_SUPER_MAGIC)) == 0) + { + partition->upart_type = UP_RFS; + } + else + if(memcmp(sb->s_magic,REISERFS2_SUPER_MAGIC,sizeof(REISERFS2_SUPER_MAGIC)) == 0) + { + partition->upart_type = UP_RFS2; + } + else + if(memcmp(sb->s_magic,REISERFS3_SUPER_MAGIC,sizeof(REISERFS3_SUPER_MAGIC)) == 0) + { + partition->upart_type = UP_RFS3; + } + else + return 1; + if(verbose>0) + log_info("\nReiserFS Marker at %u/%u/%u\n", + offset2cylinder(disk_car,partition->part_offset), + offset2head(disk_car,partition->part_offset), + offset2sector(disk_car,partition->part_offset)); + /* + * sanity checks. + */ + + if (le32(sb->s_block_count) < le32(sb->s_free_blocks)) + return (1); + + if (le32(sb->s_block_count) < REISERFS_MIN_BLOCK_AMOUNT) + return (1); + + if ((le16(sb->s_state) != REISERFS_VALID_FS) && + (le16(sb->s_state) != REISERFS_ERROR_FS)) + return (1); + + if (le16(sb->s_oid_maxsize) % 2!=0) /* must be even */ + return (1); + + if (le16(sb->s_oid_maxsize) < le16(sb->s_oid_cursize)) + return (1); + + if ((le16(sb->s_blocksize) != 4096) && (le16(sb->s_blocksize) != 8192)) + return (1); + + return 0; +} + +static int test_rfs4(const disk_t *disk_car, const struct reiser4_master_sb *sb,partition_t *partition,const int verbose, const int dump_ind) +{ + if (memcmp(sb->magic,REISERFS4_SUPER_MAGIC,sizeof(REISERFS4_SUPER_MAGIC)) == 0) + { + partition->upart_type = UP_RFS4; + } + else + return 1; + if(verbose>0) + log_info("\nReiserFS Marker at %u/%u/%u\n", offset2cylinder(disk_car,partition->part_offset),offset2head(disk_car,partition->part_offset),offset2sector(disk_car,partition->part_offset)); + /* + * sanity checks. + */ + if (le16(sb->blocksize) != 4096) + return (1); + /* if a value > 4096 become legal, the code will break while reading the filesystem size (read out of bound) */ + return 0; +} + +int recover_rfs(disk_t *disk_car, const struct reiserfs_super_block *sb,partition_t *partition,const int verbose, const int dump_ind) +{ + const struct reiser4_master_sb *sb4=(const struct reiser4_master_sb *)sb; + if(test_rfs(disk_car,sb,partition,verbose,dump_ind)==0) + { + if(verbose>0 || dump_ind!=0) + { + log_info("\nrecover_rfs\n"); + log_info("block_count=%u\n",(unsigned int)le32(sb->s_block_count)); + log_info("block_size=%u\n",le16(sb->s_blocksize)); + if(dump_ind!=0) + { + dump_log(sb,DEFAULT_SECTOR_SIZE); + } + } + partition->part_size = (uint64_t)le32(sb->s_block_count) * le16(sb->s_blocksize); + 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; + guid_cpy(&partition->part_uuid, (const efi_guid_t *)&sb->s_uuid); + set_rfs_info(disk_car,sb,partition,verbose,dump_ind); + return 0; + } + if(test_rfs4(disk_car,sb4,partition,verbose,dump_ind)==0) + { + const struct format40_super *fmt40_super=(const struct format40_super *)((const char*)sb4+le16(sb4->blocksize)); + if(verbose>0 || dump_ind!=0) + { + log_info("\nrecover_rfs\n"); + log_info("block_count=%lu\n",(unsigned long int)le64(fmt40_super->sb_block_count)); + log_info("block_size=%u\n",le16(sb4->blocksize)); + if(dump_ind!=0) + { + dump_log(sb,DEFAULT_SECTOR_SIZE); + } + } + partition->part_size = (uint64_t)le64(fmt40_super->sb_block_count) * le16(sb4->blocksize); + 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; + guid_cpy(&partition->part_uuid, (const efi_guid_t *)&sb4->uuid); + set_rfs4_info(disk_car,sb4,partition,verbose,dump_ind); + return 0; + } + return 1; +} + +static int set_rfs_info(const disk_t *disk_car,const struct reiserfs_super_block *sb,partition_t *partition, const int verbose, const int dump_ind) +{ + partition->fsname[0]='\0'; + partition->info[0]='\0'; + switch(partition->upart_type) + { + case UP_RFS: + strncpy(partition->info,"ReiserFS 3.5 with standard journal",sizeof(partition->info)); + break; + case UP_RFS2: + strncpy(partition->info,"ReiserFS 3.6 with standard journal",sizeof(partition->info)); + set_part_name(partition,(const char*)sb->s_label,16); + break; + case UP_RFS3: + if(le16(sb->sb_version)==1) + strncpy(partition->info,"ReiserFS 3.5 with non standard journal",sizeof(partition->info)); + else if(le16(sb->sb_version)==2) + strncpy(partition->info,"ReiserFS 3.6 with non standard journal",sizeof(partition->info)); + else + strncpy(partition->info,"ReiserFS ? with non standard journal",sizeof(partition->info)); + set_part_name(partition,(const char*)sb->s_label,16); + break; + default: + return 1; + } + if (le16(sb->s_state) == REISERFS_ERROR_FS) + { + strcat(partition->info,", need recovery"); + } + return 0; +} + +static int set_rfs4_info(const disk_t *disk_car,const struct reiser4_master_sb *sb,partition_t *partition, const int verbose, const int dump_ind) +{ + partition->fsname[0]='\0'; + partition->info[0]='\0'; + switch(partition->upart_type) + { + case UP_RFS4: + strncpy(partition->info,"ReiserFS 4",sizeof(partition->info)); + break; + default: + return 1; + } + return 0; +} |