/* * badblocks.c --- routines to manipulate the bad block structure * * Copyright (C) 1994, 1995, 1996 Theodore Ts'o. * * %Begin-Header% * This file may be redistributed under the terms of the GNU Public * License. * %End-Header% */ #include <stdio.h> #include <string.h> #if HAVE_UNISTD_H #include <unistd.h> #endif #include <fcntl.h> #include <time.h> #if HAVE_SYS_STAT_H #include <sys/stat.h> #endif #if HAVE_SYS_TYPES_H #include <sys/types.h> #endif #include "ext2_fs.h" #include "ext2fsP.h" /* * Helper function for making a badblocks list */ static errcode_t make_u32_list(int size, int num, __u32 *list, ext2_u32_list *ret) { ext2_u32_list bb; errcode_t retval; retval = ext2fs_get_mem(sizeof(struct ext2_struct_u32_list), &bb); if (retval) return retval; memset(bb, 0, sizeof(struct ext2_struct_u32_list)); bb->magic = EXT2_ET_MAGIC_BADBLOCKS_LIST; bb->size = size ? size : 10; bb->num = num; retval = ext2fs_get_mem(bb->size * sizeof(blk_t), &bb->list); if (!bb->list) { ext2fs_free_mem(&bb); return retval; } if (list) memcpy(bb->list, list, bb->size * sizeof(blk_t)); else memset(bb->list, 0, bb->size * sizeof(blk_t)); *ret = bb; return 0; } /* * This procedure creates an empty u32 list. */ errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size) { return make_u32_list(size, 0, 0, ret); } /* * This procedure creates an empty badblocks list. */ errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, int size) { return make_u32_list(size, 0, 0, (ext2_badblocks_list *) ret); } /* * This procedure copies a badblocks list */ errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest) { errcode_t retval; retval = make_u32_list(src->size, src->num, src->list, dest); if (retval) return retval; (*dest)->badblocks_flags = src->badblocks_flags; return 0; } errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src, ext2_badblocks_list *dest) { return ext2fs_u32_copy((ext2_u32_list) src, (ext2_u32_list *) dest); } /* * This procedure frees a badblocks list. * * (note: moved to closefs.c) */ /* * This procedure adds a block to a badblocks list. */ errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk) { errcode_t retval; int i, j; unsigned long old_size; EXT2_CHECK_MAGIC(bb, EXT2_ET_MAGIC_BADBLOCKS_LIST); if (bb->num >= bb->size) { old_size = bb->size * sizeof(__u32); bb->size += 100; retval = ext2fs_resize_mem(old_size, bb->size * sizeof(__u32), &bb->list); if (retval) { bb->size -= 100; return retval; } } /* * Add special case code for appending to the end of the list */ i = bb->num-1; if ((bb->num != 0) && (bb->list[i] == blk)) return 0; if ((bb->num == 0) || (bb->list[i] < blk)) { bb->list[bb->num++] = blk; return 0; } j = bb->num; for (i=0; i < bb->num; i++) { if (bb->list[i] == blk) return 0; if (bb->list[i] > blk) { j = i; break; } } for (i=bb->num; i > j; i--) bb->list[i] = bb->list[i-1]; bb->list[j] = blk; bb->num++; return 0; } errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, blk_t blk) { return ext2fs_u32_list_add((ext2_u32_list) bb, (__u32) blk); } /* * This procedure finds a particular block is on a badblocks * list. */ int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk) { int low, high, mid; if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST) return -1; if (bb->num == 0) return -1; low = 0; high = bb->num-1; if (blk == bb->list[low]) return low; if (blk == bb->list[high]) return high; while (low < high) { mid = (low+high)/2; if (mid == low || mid == high) break; if (blk == bb->list[mid]) return mid; if (blk < bb->list[mid]) high = mid; else low = mid; } return -1; } /* * This procedure tests to see if a particular block is on a badblocks * list. */ int ext2fs_u32_list_test(ext2_u32_list bb, __u32 blk) { if (ext2fs_u32_list_find(bb, blk) < 0) return 0; else return 1; } int ext2fs_badblocks_list_test(ext2_badblocks_list bb, blk_t blk) { return ext2fs_u32_list_test((ext2_u32_list) bb, (__u32) blk); } /* * Remove a block from the badblock list */ int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk) { int remloc, i; if (bb->num == 0) return -1; remloc = ext2fs_u32_list_find(bb, blk); if (remloc < 0) return -1; for (i = remloc ; i < bb->num-1; i++) bb->list[i] = bb->list[i+1]; bb->num--; return 0; } void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk) { ext2fs_u32_list_del(bb, blk); } errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb, ext2_u32_iterate *ret) { ext2_u32_iterate iter; errcode_t retval; EXT2_CHECK_MAGIC(bb, EXT2_ET_MAGIC_BADBLOCKS_LIST); retval = ext2fs_get_mem(sizeof(struct ext2_struct_u32_iterate), &iter); if (retval) return retval; iter->magic = EXT2_ET_MAGIC_BADBLOCKS_ITERATE; iter->bb = bb; iter->ptr = 0; *ret = iter; return 0; } errcode_t ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb, ext2_badblocks_iterate *ret) { return ext2fs_u32_list_iterate_begin((ext2_u32_list) bb, (ext2_u32_iterate *) ret); } int ext2fs_u32_list_iterate(ext2_u32_iterate iter, __u32 *blk) { ext2_u32_list bb; if (iter->magic != EXT2_ET_MAGIC_BADBLOCKS_ITERATE) return 0; bb = iter->bb; if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST) return 0; if (iter->ptr < bb->num) { *blk = bb->list[iter->ptr++]; return 1; } *blk = 0; return 0; } int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, blk_t *blk) { return ext2fs_u32_list_iterate((ext2_u32_iterate) iter, (__u32 *) blk); } void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter) { if (!iter || (iter->magic != EXT2_ET_MAGIC_BADBLOCKS_ITERATE)) return; iter->bb = 0; ext2fs_free_mem(&iter); } void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter) { ext2fs_u32_list_iterate_end((ext2_u32_iterate) iter); } int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2) { EXT2_CHECK_MAGIC(bb1, EXT2_ET_MAGIC_BADBLOCKS_LIST); EXT2_CHECK_MAGIC(bb2, EXT2_ET_MAGIC_BADBLOCKS_LIST); if (bb1->num != bb2->num) return 0; if (memcmp(bb1->list, bb2->list, bb1->num * sizeof(blk_t)) != 0) return 0; return 1; } int ext2fs_badblocks_equal(ext2_badblocks_list bb1, ext2_badblocks_list bb2) { return ext2fs_u32_list_equal((ext2_u32_list) bb1, (ext2_u32_list) bb2); } int ext2fs_u32_list_count(ext2_u32_list bb) { return bb->num; }