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* badblocks.c --- routines to manipulate the bad block structure
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* Copyright (C) 1994, 1995, 1996 Theodore Ts'o.
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* This file may be redistributed under the terms of the GNU Public
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#include <sys/types.h>
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* Helper function for making a badblocks list
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static errcode_t make_badblocks_list(int size, int num, blk_t *list,
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ext2_badblocks_list *ret)
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ext2_badblocks_list bb;
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retval = ext2fs_get_mem(sizeof(struct ext2_struct_badblocks_list),
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memset(bb, 0, sizeof(struct ext2_struct_badblocks_list));
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bb->magic = EXT2_ET_MAGIC_BADBLOCKS_LIST;
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bb->size = size ? size : 10;
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retval = ext2fs_get_mem(bb->size * sizeof(blk_t), (void **) &bb->list);
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ext2fs_free_mem((void **) &bb);
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memcpy(bb->list, list, bb->size * sizeof(blk_t));
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memset(bb->list, 0, bb->size * sizeof(blk_t));
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* This procedure creates an empty badblocks list.
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errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, int size)
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return make_badblocks_list(size, 0, 0, ret);
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* This procedure copies a badblocks list
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errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src,
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ext2_badblocks_list *dest)
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retval = make_badblocks_list(src->size, src->num, src->list,
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(*dest)->badblocks_flags = src->badblocks_flags;
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* This procedure frees a badblocks list.
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* (note: moved to closefs.c)
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* This procedure adds a block to a badblocks list.
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errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, blk_t blk)
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unsigned long old_size;
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EXT2_CHECK_MAGIC(bb, EXT2_ET_MAGIC_BADBLOCKS_LIST);
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if (bb->num >= bb->size) {
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old_size = bb->size * sizeof(blk_t);
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retval = ext2fs_resize_mem(old_size, bb->size * sizeof(blk_t),
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(void **) &bb->list);
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* Add special case code for appending to the end of the list
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if ((bb->num != 0) && (bb->list[i] == blk))
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if ((bb->num == 0) || (bb->list[i] < blk)) {
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bb->list[bb->num++] = blk;
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for (i=0; i < bb->num; i++) {
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if (bb->list[i] == blk)
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if (bb->list[i] > blk) {
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for (i=bb->num; i > j; i--)
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bb->list[i] = bb->list[i-1];
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* This procedure tests to see if a particular block is on a badblocks
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int ext2fs_badblocks_list_test(ext2_badblocks_list bb, blk_t blk)
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if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
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if (blk == bb->list[low])
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if (blk == bb->list[high])
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if (mid == low || mid == high)
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if (blk == bb->list[mid])
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if (blk < bb->list[mid])
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errcode_t ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb,
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ext2_badblocks_iterate *ret)
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ext2_badblocks_iterate iter;
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EXT2_CHECK_MAGIC(bb, EXT2_ET_MAGIC_BADBLOCKS_LIST);
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retval = ext2fs_get_mem(sizeof(struct ext2_struct_badblocks_iterate),
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iter->magic = EXT2_ET_MAGIC_BADBLOCKS_ITERATE;
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int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, blk_t *blk)
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ext2_badblocks_list bb;
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if (iter->magic != EXT2_ET_MAGIC_BADBLOCKS_ITERATE)
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if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
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if (iter->ptr < bb->num) {
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*blk = bb->list[iter->ptr++];
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void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter)
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if (!iter || (iter->magic != EXT2_ET_MAGIC_BADBLOCKS_ITERATE))
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ext2fs_free_mem((void **) &iter);
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int ext2fs_badblocks_equal(ext2_badblocks_list bb1, ext2_badblocks_list bb2)
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EXT2_CHECK_MAGIC(bb1, EXT2_ET_MAGIC_BADBLOCKS_LIST);
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EXT2_CHECK_MAGIC(bb2, EXT2_ET_MAGIC_BADBLOCKS_LIST);
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if (bb1->num != bb2->num)
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if (memcmp(bb1->list, bb2->list, bb1->num * sizeof(blk_t)) != 0)