1/* vi: set sw=4 ts=4: */ 2/* 3 * read_bb --- read the bad blocks inode 4 * 5 * Copyright (C) 1994 Theodore Ts'o. 6 * 7 * %Begin-Header% 8 * This file may be redistributed under the terms of the GNU Public 9 * License. 10 * %End-Header% 11 */ 12 13#include <stdio.h> 14#include <string.h> 15#if HAVE_UNISTD_H 16#include <unistd.h> 17#endif 18#include <fcntl.h> 19#include <time.h> 20#if HAVE_SYS_STAT_H 21#include <sys/stat.h> 22#endif 23#if HAVE_SYS_TYPES_H 24#include <sys/types.h> 25#endif 26 27#include "ext2_fs.h" 28#include "ext2fs.h" 29 30struct read_bb_record { 31 ext2_badblocks_list bb_list; 32 errcode_t err; 33}; 34 35/* 36 * Helper function for ext2fs_read_bb_inode() 37 */ 38#ifdef __TURBOC__ 39# pragma argsused 40#endif 41static int mark_bad_block(ext2_filsys fs, blk_t *block_nr, 42 e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)), 43 blk_t ref_block EXT2FS_ATTR((unused)), 44 int ref_offset EXT2FS_ATTR((unused)), 45 void *priv_data) 46{ 47 struct read_bb_record *rb = (struct read_bb_record *) priv_data; 48 49 if (blockcnt < 0) 50 return 0; 51 52 if ((*block_nr < fs->super->s_first_data_block) || 53 (*block_nr >= fs->super->s_blocks_count)) 54 return 0; /* Ignore illegal blocks */ 55 56 rb->err = ext2fs_badblocks_list_add(rb->bb_list, *block_nr); 57 if (rb->err) 58 return BLOCK_ABORT; 59 return 0; 60} 61 62/* 63 * Reads the current bad blocks from the bad blocks inode. 64 */ 65errcode_t ext2fs_read_bb_inode(ext2_filsys fs, ext2_badblocks_list *bb_list) 66{ 67 errcode_t retval; 68 struct read_bb_record rb; 69 struct ext2_inode inode; 70 blk_t numblocks; 71 72 EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); 73 74 if (!*bb_list) { 75 retval = ext2fs_read_inode(fs, EXT2_BAD_INO, &inode); 76 if (retval) 77 return retval; 78 if (inode.i_blocks < 500) 79 numblocks = (inode.i_blocks / 80 (fs->blocksize / 512)) + 20; 81 else 82 numblocks = 500; 83 retval = ext2fs_badblocks_list_create(bb_list, numblocks); 84 if (retval) 85 return retval; 86 } 87 88 rb.bb_list = *bb_list; 89 rb.err = 0; 90 retval = ext2fs_block_iterate2(fs, EXT2_BAD_INO, 0, 0, 91 mark_bad_block, &rb); 92 if (retval) 93 return retval; 94 95 return rb.err; 96} 97 98 99