Imported reiserfsprogs-3.6.9
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Jeff Mahoney committed
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@@ -0,0 +1,5 @@
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sbin_PROGRAMS = reiserfs_corrupter
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@@ -0,0 +1,382 @@
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@rm -f reiserfs_corrupter$(EXEEXT)
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#include <sys/stat.h>
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||||
#include <sys/resource.h>
|
||||
#include <sys/vfs.h>
|
||||
|
||||
#include "io.h"
|
||||
#include "misc.h"
|
||||
#include "reiserfs_lib.h"
|
||||
|
||||
enum {
|
||||
USED_BLOCKS,
|
||||
ALL_BLOCKS,
|
||||
EXTERN_BITMAP
|
||||
};
|
||||
|
||||
typedef struct corrupter_options {
|
||||
int bitmap_kind;
|
||||
char * bm_name;
|
||||
reiserfs_bitmap_t * bm;
|
||||
int block_size;
|
||||
int offset;
|
||||
} corrupter_options_t;
|
||||
|
||||
#define print_usage_and_exit() {\
|
||||
printf ("\nUsage: %s [options] device\n"\
|
||||
"Options:\n"\
|
||||
" -b bitmap\t\tscan blocks marked in bitmap\n"\
|
||||
" -S\t\t\tscan-whole-partition\n"\
|
||||
" -s blocksize\t\tfs blocksize\n"\
|
||||
" -o bitmap\t\tskip offset blocks\n\n"\
|
||||
, argv[0]);\
|
||||
exit (16);\
|
||||
}
|
||||
|
||||
static char * parse_options (corrupter_options_t * options, int argc, char * argv [])
|
||||
{
|
||||
int c;
|
||||
options->bitmap_kind = USED_BLOCKS;
|
||||
options->block_size = 4096;
|
||||
options->offset = 0;
|
||||
options->bm_name = NULL;
|
||||
options->bm = NULL;
|
||||
|
||||
while (1) {
|
||||
int option_index;
|
||||
|
||||
c = getopt_long (argc, argv, "Sb:s:o:",
|
||||
NULL, &option_index);
|
||||
if (c == -1)
|
||||
break;
|
||||
|
||||
switch (c) {
|
||||
case 0:
|
||||
/* long-only options */
|
||||
|
||||
break;
|
||||
|
||||
case 'b': /* --scan-marked-in-bitmap */
|
||||
options->bitmap_kind = EXTERN_BITMAP;
|
||||
options->bm_name = optarg;
|
||||
break;
|
||||
|
||||
case 'S': /* --scan-whole-partition */
|
||||
options->bitmap_kind = ALL_BLOCKS;
|
||||
break;
|
||||
|
||||
case 'o': /* --scan-marked-in-bitmap */
|
||||
options->offset = atoi (optarg);
|
||||
break;
|
||||
|
||||
case 's': /* --scan-marked-in-bitmap */
|
||||
options->block_size = atoi (optarg);
|
||||
break;
|
||||
|
||||
default:
|
||||
print_usage_and_exit();
|
||||
}
|
||||
}
|
||||
|
||||
if (optind != argc - 1)
|
||||
print_usage_and_exit();
|
||||
|
||||
return argv[optind];
|
||||
}
|
||||
|
||||
void load_bitmap_from_file (corrupter_options_t * options) {
|
||||
FILE * fd;
|
||||
|
||||
fd = fopen (options->bm_name, "r");
|
||||
|
||||
if (!fd)
|
||||
reiserfs_panic ("%s: could not load bitmap: %s\n", __FUNCTION__, strerror(errno));
|
||||
|
||||
options->bm = reiserfs_bitmap_load (fd);
|
||||
|
||||
if (!options->bm)
|
||||
reiserfs_panic ("could not load fitmap from \"%s\"", options->bm_name);
|
||||
|
||||
fclose (fd);
|
||||
}
|
||||
|
||||
void warn_what_will_be_done (corrupter_options_t * options, char * file_name, int bl_count) {
|
||||
printf ("====================\n");
|
||||
printf ("\tprogram will corrupt %s\n", file_name);
|
||||
printf ("\tblock size is %d\n", options->block_size);
|
||||
printf ("\toffset is %d blocks\n", options->offset);
|
||||
|
||||
if (options->bitmap_kind == ALL_BLOCKS) {
|
||||
printf ("\tall formatted blocks, bitmap and journal blocks will be corrupted\n");
|
||||
} else if (options->bitmap_kind == USED_BLOCKS) {
|
||||
printf ("\tall formatted blocks, bitmap and journal blocks which are used in fs bitmap will be corrupted\n");
|
||||
} else if (options->bitmap_kind == EXTERN_BITMAP) {
|
||||
printf ("\tall formatted blocks, bitmap and journal blocks from bitmap %s will be corrupted\n", options->bm_name);
|
||||
}
|
||||
|
||||
printf ("\tblocks count %d\n", bl_count);
|
||||
printf ("====================\n");
|
||||
}
|
||||
|
||||
int main (int argc, char * argv []) {
|
||||
corrupter_options_t options;
|
||||
char * file_name;
|
||||
unsigned int block_count, i;
|
||||
reiserfs_filsys_t * fs;
|
||||
|
||||
file_name = parse_options (&options, argc, argv);
|
||||
|
||||
fs = reiserfs_open (file_name, O_RDONLY, 0, &options, 1);
|
||||
|
||||
if (no_reiserfs_found (fs))
|
||||
die ("could not open filesystem on \"%s\"", file_name);
|
||||
|
||||
/* keep SB to separate memory */
|
||||
fs->fs_ondisk_sb = getmem(fs->fs_blocksize);
|
||||
memcpy (fs->fs_ondisk_sb, fs->fs_super_bh->b_data, fs->fs_blocksize);
|
||||
|
||||
block_count = get_sb_block_count (fs->fs_ondisk_sb);
|
||||
|
||||
if (options.bm_name) {
|
||||
load_bitmap_from_file (&options);
|
||||
} else {
|
||||
if (reiserfs_open_ondisk_bitmap (fs))
|
||||
die ("could not open bitmap\n");
|
||||
|
||||
options.bm = reiserfs_create_bitmap (fs->fs_bitmap2->bm_bit_size);
|
||||
reiserfs_bitmap_copy (options.bm, fs->fs_bitmap2);
|
||||
}
|
||||
|
||||
if (options.bm && block_count > options.bm->bm_bit_size) {
|
||||
printf ("fs is larger (%d blocks) then bitmap (%ld blocks), work with %ld blocks only\n",
|
||||
block_count, options.bm->bm_bit_size, options.bm->bm_bit_size);
|
||||
block_count = options.bm->bm_bit_size;
|
||||
}
|
||||
|
||||
warn_what_will_be_done (&options, file_name, block_count);
|
||||
|
||||
for (i = options.offset; i < block_count; i++) {
|
||||
int who;
|
||||
struct buffer_head * bh;
|
||||
/* read every block and corrupt all formatted blocks */
|
||||
if (!reiserfs_bitmap_test_bit (options.bm, i))
|
||||
continue;
|
||||
|
||||
bh = bread (fs->fs_dev, i, fs->fs_blocksize);
|
||||
|
||||
who = who_is_this (bh->b_data, bh->b_size);
|
||||
|
||||
/*
|
||||
if (block of bitmap || block of journal || leaf || internal)
|
||||
take N random bytes and write them into N random place
|
||||
within the block
|
||||
*/
|
||||
if (who != THE_SUPER && who != THE_LEAF && who != THE_INTERNAL && who != THE_JDESC &&
|
||||
!block_of_bitmap (fs, i) && !block_of_journal (fs, i))
|
||||
continue;
|
||||
|
||||
printf ("\ncorrupt %d ", i);
|
||||
}
|
||||
|
||||
freemem(fs->fs_ondisk_sb);
|
||||
|
||||
reiserfs_close (fs);
|
||||
printf ("\nDone\n");
|
||||
return 0;
|
||||
}
|
||||
Reference in new issue
Block a user