| /* |
| * badblocks.c - Bad blocks checker |
| * |
| * Copyright (C) 1992, 1993, 1994 Remy Card <card@masi.ibp.fr> |
| * Laboratoire MASI, Institut Blaise Pascal |
| * Universite Pierre et Marie Curie (Paris VI) |
| * |
| * Copyright 1995, 1996, 1997 by Theodore Ts'o |
| * Copyright 1999 by David Beattie |
| * |
| * This file is based on the minix file system programs fsck and mkfs |
| * written and copyrighted by Linus Torvalds <Linus.Torvalds@cs.helsinki.fi> |
| * |
| * %Begin-Header% |
| * This file may be redistributed under the terms of the GNU Public |
| * License. |
| * %End-Header% |
| */ |
| |
| /* |
| * History: |
| * 93/05/26 - Creation from e2fsck |
| * 94/02/27 - Made a separate bad blocks checker |
| * 99/06/30...99/07/26 - Added non-destructive write-testing, |
| * and a whole host of other features. |
| */ |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #ifdef HAVE_GETOPT_H |
| #include <getopt.h> |
| #endif |
| #include <signal.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| #include <setjmp.h> |
| |
| #include <sys/ioctl.h> |
| #include <sys/types.h> |
| |
| #if HAVE_LINUX_FS_H |
| #include <linux/fd.h> |
| #include <linux/fs.h> |
| #endif |
| |
| #include "et/com_err.h" |
| #include "ext2fs/ext2_io.h" |
| #include <linux/ext2_fs.h> |
| #include "ext2fs/ext2fs.h" |
| |
| const char * program_name = "badblocks"; |
| const char * done_string = "done \n"; |
| |
| int v_flag = 0; /* verbose */ |
| int w_flag = 0; /* do r/w test: 0=no, 1=yes, 2=non-destructive */ |
| int s_flag = 0; /* show progress of test */ |
| |
| static void usage(void) |
| { |
| fprintf (stderr, "Usage: %s [-b block_size] [-i input_file] [-o output_file] [-svwn]\n [-c blocks_at_once] [-p num_passes] device blocks_count [start_count]\n", |
| program_name); |
| exit (1); |
| } |
| |
| static unsigned long currently_testing = 0; |
| static unsigned long num_blocks = 0; |
| static ext2_badblocks_list bb_list = NULL; |
| static FILE *out; |
| static blk_t next_bad = 0; |
| static ext2_badblocks_iterate bb_iter = NULL; |
| |
| static void bb_output (unsigned long bad) |
| { |
| errcode_t errcode; |
| |
| fprintf (out, "%lu\n", bad); |
| |
| errcode = ext2fs_badblocks_list_add (bb_list, bad); |
| if (errcode) { |
| com_err (program_name, errcode, "adding to in-memory bad block list"); |
| exit (1); |
| } |
| |
| /* kludge: |
| increment the iteration through the bb_list if |
| an element was just added before the current iteration |
| position. This should not cause next_bad to change. */ |
| if (bb_iter && bad < next_bad) |
| ext2fs_badblocks_list_iterate (bb_iter, &next_bad); |
| } |
| |
| static void print_status (void) |
| { |
| fprintf(stderr, "%9ld/%9ld", currently_testing, num_blocks); |
| fprintf(stderr, "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"); |
| fflush (stderr); |
| } |
| |
| static void alarm_intr (int alnum) |
| { |
| signal (SIGALRM, alarm_intr); |
| alarm(1); |
| if (!num_blocks) |
| return; |
| fprintf(stderr, "%9ld/%9ld", currently_testing, num_blocks); |
| fprintf(stderr, "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b"); |
| fflush (stderr); |
| } |
| |
| static void *terminate_addr = NULL; |
| |
| static void terminate_intr (int signo) |
| { |
| if (terminate_addr) |
| longjmp(terminate_addr,1); |
| exit(1); |
| } |
| |
| static void capture_terminate (jmp_buf term_addr) |
| { |
| terminate_addr = term_addr; |
| signal (SIGHUP, terminate_intr); |
| signal (SIGINT, terminate_intr); |
| signal (SIGPIPE, terminate_intr); |
| signal (SIGTERM, terminate_intr); |
| signal (SIGUSR1, terminate_intr); |
| signal (SIGUSR2, terminate_intr); |
| } |
| |
| /* |
| * Perform a read of a sequence of blocks; return the number of blocks |
| * successfully sequentially read. |
| */ |
| static long do_read (int dev, char * buffer, int try, unsigned long block_size, |
| unsigned long current_block) |
| { |
| long got; |
| |
| if (v_flag > 1) |
| print_status(); |
| |
| /* Seek to the correct loc. */ |
| if (ext2fs_llseek (dev, (ext2_loff_t) current_block * block_size, |
| SEEK_SET) != (ext2_loff_t) current_block * block_size) |
| com_err (program_name, errno, "during seek"); |
| |
| /* Try the read */ |
| got = read (dev, buffer, try * block_size); |
| if (got < 0) |
| got = 0; |
| if (got & 511) |
| fprintf (stderr, |
| "Weird value (%ld) in do_read\n", got); |
| got /= block_size; |
| return got; |
| } |
| |
| /* |
| * Perform a write of a sequence of blocks; return the number of blocks |
| * successfully sequentially written. |
| */ |
| static long do_write (int dev, char * buffer, int try, unsigned long block_size, |
| unsigned long current_block) |
| { |
| long got; |
| |
| if (v_flag > 1) |
| print_status(); |
| |
| /* Seek to the correct loc. */ |
| if (ext2fs_llseek (dev, (ext2_loff_t) current_block * block_size, |
| SEEK_SET) != (ext2_loff_t) current_block * block_size) |
| com_err (program_name, errno, "during seek"); |
| |
| /* Try the write */ |
| got = write (dev, buffer, try * block_size); |
| if (got < 0) |
| got = 0; |
| if (got & 511) |
| fprintf (stderr, |
| "Weird value (%ld) in do_write\n", got); |
| got /= block_size; |
| return got; |
| } |
| |
| static int host_dev; |
| |
| static void flush_bufs (int dev, int sync) |
| { |
| if (v_flag |
| #if !defined (BLKFLSBUF) && !defined (FDFLUSH) |
| && sync |
| #endif |
| ) |
| fprintf (stderr, "Flushing buffers\n"); |
| |
| if (sync && fdatasync (dev) == -1) |
| com_err (program_name, errno, "during fsync"); |
| |
| #ifdef BLKFLSBUF |
| ioctl (host_dev, BLKFLSBUF, 0); /* In case this is a HD */ |
| #endif |
| #ifdef FDFLUSH |
| ioctl (host_dev, FDFLUSH, 0); /* In case this is floppy */ |
| #endif |
| } |
| |
| static unsigned int test_ro (int dev, unsigned long blocks_count, |
| unsigned long block_size, |
| unsigned long from_count, unsigned long blocks_at_once) |
| { |
| char * blkbuf; |
| int try; |
| long got; |
| unsigned int bb_count = 0; |
| errcode_t errcode; |
| |
| errcode = ext2fs_badblocks_list_iterate_begin(bb_list,&bb_iter); |
| if (errcode) { |
| com_err (program_name, errcode, "while beginning bad block list iteration"); |
| exit (1); |
| } |
| do { |
| ext2fs_badblocks_list_iterate (bb_iter, &next_bad); |
| } while (next_bad && next_bad < from_count); |
| |
| blkbuf = malloc (blocks_at_once * block_size); |
| if (!blkbuf) |
| { |
| com_err (program_name, ENOMEM, "while allocating buffers"); |
| exit (1); |
| } |
| flush_bufs (dev, 0); |
| if (v_flag) { |
| fprintf (stderr, |
| "Checking for bad blocks in read-only mode\n"); |
| fprintf (stderr, "From block %lu to %lu\n", from_count, blocks_count); |
| } |
| try = blocks_at_once; |
| currently_testing = from_count; |
| num_blocks = blocks_count; |
| if (s_flag || v_flag > 1) { |
| fprintf(stderr, "Checking for bad blocks (read-only test): "); |
| if (v_flag <= 1) |
| alarm_intr(SIGALRM); |
| } |
| while (currently_testing < blocks_count) |
| { |
| if (next_bad) { |
| if (currently_testing == next_bad) { |
| /* fprintf (out, "%lu\n", nextbad); */ |
| ext2fs_badblocks_list_iterate (bb_iter, &next_bad); |
| currently_testing++; |
| continue; |
| } |
| else if (currently_testing + try > next_bad) |
| try = next_bad - currently_testing; |
| } |
| if (currently_testing + try > blocks_count) |
| try = blocks_count - currently_testing; |
| got = do_read (dev, blkbuf, try, block_size, currently_testing); |
| currently_testing += got; |
| if (got == try) { |
| try = blocks_at_once; |
| continue; |
| } |
| else |
| try = 1; |
| if (got == 0) { |
| bb_output (currently_testing++), ++bb_count; |
| } |
| } |
| num_blocks = 0; |
| alarm(0); |
| if (s_flag || v_flag > 1) |
| fprintf(stderr, done_string); |
| |
| fflush (stderr); |
| free (blkbuf); |
| |
| ext2fs_badblocks_list_iterate_end(bb_iter); |
| |
| return bb_count; |
| } |
| |
| static unsigned int test_rw (int dev, unsigned long blocks_count, |
| unsigned long block_size, |
| unsigned long from_count, unsigned long blocks_at_once) |
| { |
| int i; |
| char * buffer; |
| unsigned char pattern[] = {0xaa, 0x55, 0xff, 0x00}; |
| unsigned int bb_count = 0; |
| |
| buffer = malloc (2 * block_size); |
| if (!buffer) |
| { |
| com_err (program_name, ENOMEM, "while allocating buffers"); |
| exit (1); |
| } |
| |
| flush_bufs (dev, 0); |
| |
| if (v_flag) { |
| fprintf(stderr, |
| "Checking for bad blocks in read-write mode\n"); |
| fprintf(stderr, "From block %lu to %lu\n", |
| from_count, blocks_count); |
| } |
| for (i = 0; i < sizeof (pattern); i++) { |
| memset (buffer, pattern[i], block_size); |
| if (s_flag | v_flag) |
| fprintf (stderr, "Writing pattern 0x%08x: ", |
| *((int *) buffer)); |
| num_blocks = blocks_count; |
| currently_testing = from_count; |
| if (s_flag && v_flag <= 1) |
| alarm_intr(SIGALRM); |
| for (; |
| currently_testing < blocks_count; |
| currently_testing++) |
| { |
| if (ext2fs_llseek (dev, (ext2_loff_t) currently_testing * |
| block_size, SEEK_SET) != |
| (ext2_loff_t) currently_testing * block_size) |
| com_err (program_name, errno, |
| "during seek on block %d", |
| currently_testing); |
| if (v_flag > 1) |
| print_status(); |
| write (dev, buffer, block_size); |
| } |
| num_blocks = 0; |
| alarm (0); |
| if (s_flag | v_flag) |
| fprintf(stderr, done_string); |
| flush_bufs (dev, 1); |
| if (s_flag | v_flag) |
| fprintf (stderr, "Reading and comparing: "); |
| num_blocks = blocks_count; |
| currently_testing = from_count; |
| if (s_flag && v_flag <= 1) |
| alarm_intr(SIGALRM); |
| for (; |
| currently_testing < blocks_count; |
| currently_testing++) |
| { |
| if (ext2fs_llseek (dev, (ext2_loff_t) currently_testing * |
| block_size, SEEK_SET) != |
| (ext2_loff_t) currently_testing * block_size) |
| com_err (program_name, errno, |
| "during seek on block %d", |
| currently_testing); |
| if (v_flag > 1) |
| print_status(); |
| if (read (dev, buffer + block_size, block_size) < block_size) |
| |
| ext2fs_badblocks_list_test (bb_list, currently_testing) |
| || ( bb_output (currently_testing), ++bb_count ); |
| |
| else if (memcmp (buffer, buffer + block_size, block_size)) |
| |
| ext2fs_badblocks_list_test (bb_list, currently_testing) |
| || ( bb_output (currently_testing), ++bb_count ); |
| |
| } |
| num_blocks = 0; |
| alarm (0); |
| if (s_flag | v_flag) |
| fprintf(stderr, done_string); |
| flush_bufs (dev, 0); |
| } |
| |
| return bb_count; |
| } |
| |
| static unsigned int test_nd (int dev, unsigned long blocks_count, |
| unsigned long block_size, |
| unsigned long from_count, unsigned long blocks_at_once) |
| { |
| char * blkbuf; |
| char * ptr; |
| int try; |
| long got; |
| long buf_used; |
| unsigned long bufblk[blocks_at_once]; |
| unsigned long bufblks[blocks_at_once]; |
| jmp_buf terminate_env; |
| unsigned int bb_count = 0; |
| errcode_t errcode; |
| |
| errcode = ext2fs_badblocks_list_iterate_begin(bb_list,&bb_iter); |
| if (errcode) { |
| com_err (program_name, errcode, "while beginning bad block list iteration"); |
| exit (1); |
| } |
| do { |
| ext2fs_badblocks_list_iterate (bb_iter, &next_bad); |
| } while (next_bad && next_bad < from_count); |
| |
| blkbuf = malloc (3 * blocks_at_once * block_size); |
| if (!blkbuf) |
| { |
| com_err (program_name, ENOMEM, "while allocating buffers"); |
| exit (1); |
| } |
| |
| /* inititalize the test data randomly: */ |
| if (v_flag) { |
| fprintf (stderr, "Initializing random test data\n"); |
| } |
| for(ptr = blkbuf + blocks_at_once * block_size; |
| ptr < blkbuf + 2 * blocks_at_once * block_size; |
| ++ptr) { |
| (*ptr) = random() % (1 << sizeof(char)); |
| } |
| |
| flush_bufs (dev, 0); |
| if (v_flag) { |
| fprintf (stderr, |
| "Checking for bad blocks in non-destructive read-write mode\n"); |
| fprintf (stderr, "From block %lu to %lu\n", from_count, blocks_count); |
| } |
| buf_used = 0; |
| currently_testing = from_count; |
| num_blocks = blocks_count; |
| if (s_flag || v_flag > 1) { |
| fprintf (stderr, "Checking for bad blocks (non-destructive read-write test): "); |
| if (v_flag <= 1) |
| alarm_intr(SIGALRM); |
| } |
| if (! setjmp(terminate_env)) { |
| /* set up abend handler */ |
| capture_terminate(terminate_env); |
| |
| while (currently_testing < blocks_count) |
| { |
| try = blocks_at_once - buf_used; |
| if (next_bad) { |
| if (currently_testing == next_bad) { |
| /* fprintf (out, "%lu\n", nextbad); */ |
| ext2fs_badblocks_list_iterate (bb_iter, &next_bad); |
| bufblk[buf_used] = currently_testing++; |
| goto test_full_buf; |
| } |
| else if (currently_testing + try > next_bad) |
| try = next_bad - currently_testing; |
| } |
| if (currently_testing + try > blocks_count) |
| try = blocks_count - currently_testing; |
| got = do_read (dev, blkbuf + buf_used * block_size, try, |
| block_size, currently_testing); |
| |
| /* if reading succeeded, write the test data */ |
| if (got) { |
| long written; |
| |
| written = do_write (dev, blkbuf + (buf_used + blocks_at_once) * block_size, |
| got, block_size, currently_testing); |
| if (written != got) |
| com_err (program_name, errno, "during test data write, block %lu", |
| currently_testing + written); |
| } |
| |
| bufblk[buf_used] = currently_testing; |
| bufblks[buf_used] = got; |
| buf_used += got; |
| currently_testing += got; |
| if (got != try) |
| bb_output (currently_testing++), ++bb_count; |
| |
| test_full_buf: |
| |
| if (buf_used == blocks_at_once || currently_testing == blocks_count) { |
| if (s_flag || v_flag > 1) |
| fprintf(stderr, "\n"); |
| flush_bufs (dev, 1); |
| |
| for (buf_used = 0, currently_testing = bufblk[0]; |
| buf_used < blocks_at_once && |
| currently_testing < blocks_count && |
| (currently_testing = bufblk[buf_used]) < blocks_count; |
| buf_used += bufblks[buf_used]) |
| { |
| /* for each contiguous block that we read into the buffer |
| (and wrote test data into afterwards), read it back |
| (looping if necessary, to get past newly discovered |
| unreadable blocks, of which there should be none, but with |
| a hard drive which is unreliable, it has happened), and |
| compare with the test data that was written; output to |
| the bad block list if it doesn't match. */ |
| |
| int offset; |
| |
| while ((offset = currently_testing - bufblk[buf_used]) < |
| bufblks[buf_used]) { |
| int i; |
| |
| try = bufblks[buf_used] - offset; |
| got = do_read (dev, blkbuf + (2 * blocks_at_once + buf_used + offset) * block_size, |
| try, block_size, currently_testing); |
| |
| /* test the comparison between all the blocks successfully read */ |
| for (i = 0; i < got; ++i) |
| if (memcmp (blkbuf + (blocks_at_once + buf_used + offset + i) * block_size, |
| blkbuf + (2 * blocks_at_once + buf_used + offset + i) * block_size, |
| block_size)) |
| bb_output (currently_testing + i), ++bb_count; |
| |
| currently_testing += got; |
| if (got != try) |
| bb_output (currently_testing++), ++bb_count; |
| } |
| |
| /* when done, write back original data */ |
| do_write (dev, blkbuf + buf_used * block_size, |
| bufblks[buf_used], block_size, bufblk[buf_used]); |
| } |
| |
| /* empty the buffer so it can be reused */ |
| buf_used = 0; |
| } |
| } |
| num_blocks = 0; |
| alarm(0); |
| if (s_flag || v_flag > 1) |
| fprintf(stderr, "done \n"); |
| |
| } else { |
| /* abnormal termination by a signal is handled here */ |
| /* logic is: write back the data that is in the buffer, |
| so that we can maintain data integrity on disk. Then |
| abort. */ |
| long buf_written; |
| |
| fprintf(stderr, "Interrupt caught, cleaning up\n"); |
| |
| for (buf_written = 0; |
| buf_written < buf_used; |
| buf_written += bufblks[buf_written]) |
| do_write (dev, blkbuf + buf_written * block_size, |
| bufblks[buf_written], block_size, bufblk[buf_written]); |
| |
| fflush (out); |
| |
| abort (); |
| } |
| |
| fflush (stderr); |
| free (blkbuf); |
| |
| ext2fs_badblocks_list_iterate_end(bb_iter); |
| |
| return bb_count; |
| } |
| |
| int main (int argc, char ** argv) |
| { |
| int c; |
| char * tmp; |
| char * device_name; |
| char * host_device_name = NULL; |
| char * input_file = NULL; |
| char * output_file = NULL; |
| FILE * in = NULL; |
| unsigned long block_size = 1024; |
| unsigned long blocks_at_once = 16; |
| unsigned long blocks_count, from_count; |
| int num_passes = 0; |
| int passes_clean = 0; |
| int dev; |
| errcode_t errcode; |
| |
| setbuf(stdout, NULL); |
| setbuf(stderr, NULL); |
| if (argc && *argv) |
| program_name = *argv; |
| while ((c = getopt (argc, argv, "b:i:o:svwnc:p:h:")) != EOF) { |
| switch (c) { |
| case 'b': |
| block_size = strtoul (optarg, &tmp, 0); |
| if (*tmp || block_size > 4096) { |
| com_err (program_name, 0, |
| "bad block size - %s", optarg); |
| exit (1); |
| } |
| break; |
| case 'i': |
| input_file = optarg; |
| break; |
| case 'o': |
| output_file = optarg; |
| break; |
| case 's': |
| s_flag = 1; |
| break; |
| case 'v': |
| v_flag++; |
| break; |
| case 'w': |
| if (! w_flag) |
| w_flag = 1; |
| break; |
| case 'n': |
| w_flag = 2; |
| break; |
| case 'c': |
| blocks_at_once = strtoul (optarg, &tmp, 0); |
| if (*tmp) { |
| com_err (program_name, 0, |
| "bad simultaneous block count - %s", optarg); |
| exit (1); |
| } |
| break; |
| case 'p': |
| num_passes = strtoul (optarg, &tmp, 0); |
| if (*tmp) { |
| com_err (program_name, 0, |
| "bad number of clean passes - %s", optarg); |
| exit (1); |
| } |
| break; |
| case 'h': |
| host_device_name = optarg; |
| break; |
| default: |
| usage(); |
| } |
| } |
| if (optind > argc - 1) |
| usage(); |
| device_name = argv[optind++]; |
| if (optind > argc - 1) |
| usage(); |
| blocks_count = strtoul (argv[optind], &tmp, 0); |
| if (*tmp) |
| { |
| com_err (program_name, 0, "bad blocks count - %s", argv[optind]); |
| exit (1); |
| } |
| if (++optind <= argc-1) { |
| from_count = strtoul (argv[optind], &tmp, 0); |
| } else from_count = 0; |
| if (from_count >= blocks_count) { |
| com_err (program_name, 0, "bad blocks range: %lu-%lu", |
| from_count, blocks_count); |
| exit (1); |
| } |
| dev = open (device_name, w_flag ? O_RDWR : O_RDONLY); |
| if (dev == -1) |
| { |
| com_err (program_name, errno, "while trying to open %s", |
| device_name); |
| exit (1); |
| } |
| if (host_device_name) { |
| host_dev = open (host_device_name, O_RDONLY); |
| if (host_dev == -1) |
| { |
| com_err (program_name, errno, "while trying to open %s", |
| host_device_name); |
| exit (1); |
| } |
| } else |
| host_dev = dev; |
| if (input_file) |
| if (strcmp (input_file, "-") == 0) |
| in = stdin; |
| else { |
| in = fopen (input_file, "r"); |
| if (in == NULL) |
| { |
| com_err (program_name, errno,"while trying to open %s", |
| input_file); |
| exit (1); |
| } |
| } |
| if (output_file && strcmp (output_file, "-") != 0) |
| { |
| out = fopen (output_file, "w"); |
| if (out == NULL) |
| { |
| com_err (program_name, errno,"while trying to open %s", |
| output_file); |
| exit (1); |
| } |
| } |
| else |
| out = stdout; |
| |
| errcode = ext2fs_badblocks_list_create(&bb_list,0); |
| if (errcode) { |
| com_err (program_name, errcode, "creating in-memory bad blocks list"); |
| exit (1); |
| } |
| |
| if (in) { |
| for(;;) { |
| switch(fscanf (in, "%lu\n", &next_bad)) { |
| case 0: |
| com_err (program_name, 0, "input file - bad format"); |
| exit (1); |
| case EOF: |
| break; |
| default: |
| errcode = ext2fs_badblocks_list_add(bb_list,next_bad); |
| if (errcode) { |
| com_err (program_name, errcode, "adding to in-memory bad block list"); |
| exit (1); |
| } |
| continue; |
| } |
| break; |
| } |
| |
| if (in != stdin) |
| fclose (in); |
| } |
| |
| do { |
| unsigned int bb_count; |
| |
| (bb_count = |
| |
| (w_flag == 2 ? test_nd |
| : w_flag ? test_rw |
| : test_ro) |
| (dev, blocks_count, block_size, from_count, |
| blocks_at_once) |
| ) ? passes_clean = 0 : ++passes_clean; |
| |
| if (v_flag) |
| fprintf(stderr,"Pass completed, %u bad blocks found.\n", bb_count); |
| |
| } while (passes_clean < num_passes); |
| |
| close (dev); |
| if (out != stdout) |
| fclose (out); |
| return 0; |
| } |