Home | History | Annotate | Download | only in e2fsck 
      1 /*
      2  * badblocks.c --- replace/append bad blocks to the bad block inode
      3  *
      4  * Copyright (C) 1993, 1994 Theodore Ts'o.  This file may be
      5  * redistributed under the terms of the GNU Public License.
      6  */
      7 
      8 #include <time.h>
      9 #ifdef HAVE_ERRNO_H
     10 #include <errno.h>
     11 #endif
     12 
     13 #include <et/com_err.h>
     14 #include "e2fsck.h"
     15 
     16 static int check_bb_inode_blocks(ext2_filsys fs, blk_t *block_nr, int blockcnt,
     17 				 void *priv_data);
     18 
     19 
     20 static void invalid_block(ext2_filsys fs EXT2FS_ATTR((unused)), blk_t blk)
     21 {
     22 	printf(_("Bad block %u out of range; ignored.\n"), blk);
     23 	return;
     24 }
     25 
     26 void read_bad_blocks_file(e2fsck_t ctx, const char *bad_blocks_file,
     27 			  int replace_bad_blocks)
     28 {
     29 	ext2_filsys fs = ctx->fs;
     30 	errcode_t	retval;
     31 	badblocks_list	bb_list = 0;
     32 	FILE		*f;
     33 	char		buf[1024];
     34 
     35 	e2fsck_read_bitmaps(ctx);
     36 
     37 	/*
     38 	 * Make sure the bad block inode is sane.  If there are any
     39 	 * illegal blocks, clear them.
     40 	 */
     41 	retval = ext2fs_block_iterate(fs, EXT2_BAD_INO, 0, 0,
     42 				      check_bb_inode_blocks, 0);
     43 	if (retval) {
     44 		com_err("ext2fs_block_iterate", retval,
     45 			_("while sanity checking the bad blocks inode"));
     46 		goto fatal;
     47 	}
     48 
     49 	/*
     50 	 * If we're appending to the bad blocks inode, read in the
     51 	 * current bad blocks.
     52 	 */
     53 	if (!replace_bad_blocks) {
     54 		retval = ext2fs_read_bb_inode(fs, &bb_list);
     55 		if (retval) {
     56 			com_err("ext2fs_read_bb_inode", retval,
     57 				_("while reading the bad blocks inode"));
     58 			goto fatal;
     59 		}
     60 	}
     61 
     62 	/*
     63 	 * Now read in the bad blocks from the file; if
     64 	 * bad_blocks_file is null, then try to run the badblocks
     65 	 * command.
     66 	 */
     67 	if (bad_blocks_file) {
     68 		f = fopen(bad_blocks_file, "r");
     69 		if (!f) {
     70 			com_err("read_bad_blocks_file", errno,
     71 				_("while trying to open %s"), bad_blocks_file);
     72 			goto fatal;
     73 		}
     74 	} else {
     75 		sprintf(buf, "badblocks -b %d -X %s%s%s %d", fs->blocksize,
     76 			(ctx->options & E2F_OPT_PREEN) ? "" : "-s ",
     77 			(ctx->options & E2F_OPT_WRITECHECK) ? "-n " : "",
     78 			fs->device_name, fs->super->s_blocks_count-1);
     79 		f = popen(buf, "r");
     80 		if (!f) {
     81 			com_err("read_bad_blocks_file", errno,
     82 				_("while trying popen '%s'"), buf);
     83 			goto fatal;
     84 		}
     85 	}
     86 	retval = ext2fs_read_bb_FILE(fs, f, &bb_list, invalid_block);
     87 	if (bad_blocks_file)
     88 		fclose(f);
     89 	else
     90 		pclose(f);
     91 	if (retval) {
     92 		com_err("ext2fs_read_bb_FILE", retval,
     93 			_("while reading in list of bad blocks from file"));
     94 		goto fatal;
     95 	}
     96 
     97 	/*
     98 	 * Finally, update the bad blocks from the bad_block_map
     99 	 */
    100 	printf("%s: Updating bad block inode.\n", ctx->device_name);
    101 	retval = ext2fs_update_bb_inode(fs, bb_list);
    102 	if (retval) {
    103 		com_err("ext2fs_update_bb_inode", retval,
    104 			_("while updating bad block inode"));
    105 		goto fatal;
    106 	}
    107 
    108 	ext2fs_badblocks_list_free(bb_list);
    109 	return;
    110 
    111 fatal:
    112 	ctx->flags |= E2F_FLAG_ABORT;
    113 	return;
    114 
    115 }
    116 
    117 static int check_bb_inode_blocks(ext2_filsys fs,
    118 				 blk_t *block_nr,
    119 				 int blockcnt EXT2FS_ATTR((unused)),
    120 				 void *priv_data EXT2FS_ATTR((unused)))
    121 {
    122 	if (!*block_nr)
    123 		return 0;
    124 
    125 	/*
    126 	 * If the block number is outrageous, clear it and ignore it.
    127 	 */
    128 	if (*block_nr >= fs->super->s_blocks_count ||
    129 	    *block_nr < fs->super->s_first_data_block) {
    130 		printf(_("Warning: illegal block %u found in bad block inode.  "
    131 			 "Cleared.\n"), *block_nr);
    132 		*block_nr = 0;
    133 		return BLOCK_CHANGED;
    134 	}
    135 
    136 	return 0;
    137 }
    138 
    139