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authorChristophe Grenier <grenier@cgsecurity.org>2007-10-29 22:38:52 +0100
committerChristophe Grenier <grenier@cgsecurity.org>2007-10-29 22:38:52 +0100
commit9928d99936105b4653d2d1b8ca74dc3ffba5c71e (patch)
tree06aa4f5e9f0055027c6fb54dd47a8414cf2fba32 /src/rfs.c
First version in git
Diffstat (limited to 'src/rfs.c')
-rw-r--r--src/rfs.c232
1 files changed, 232 insertions, 0 deletions
diff --git a/src/rfs.c b/src/rfs.c
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+++ 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;
+}