2 * badblocks.c --- routines to manipulate the bad block structure
4 * Copyright (C) 1994, 1995, 1996 Theodore Ts'o.
7 * This file may be redistributed under the terms of the GNU Public
23 #include <sys/types.h>
30 * Helper function for making a badblocks list
32 static errcode_t make_badblocks_list(int size, int num, blk_t *list,
33 ext2_badblocks_list *ret)
35 ext2_badblocks_list bb;
38 retval = ext2fs_get_mem(sizeof(struct ext2_struct_badblocks_list),
42 memset(bb, 0, sizeof(struct ext2_struct_badblocks_list));
43 bb->magic = EXT2_ET_MAGIC_BADBLOCKS_LIST;
44 bb->size = size ? size : 10;
46 retval = ext2fs_get_mem(bb->size * sizeof(blk_t), (void **) &bb->list);
48 ext2fs_free_mem((void **) &bb);
52 memcpy(bb->list, list, bb->size * sizeof(blk_t));
54 memset(bb->list, 0, bb->size * sizeof(blk_t));
61 * This procedure creates an empty badblocks list.
63 errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, int size)
65 return make_badblocks_list(size, 0, 0, ret);
69 * This procedure copies a badblocks list
71 errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src,
72 ext2_badblocks_list *dest)
76 retval = make_badblocks_list(src->size, src->num, src->list,
80 (*dest)->badblocks_flags = src->badblocks_flags;
86 * This procedure frees a badblocks list.
88 * (note: moved to closefs.c)
93 * This procedure adds a block to a badblocks list.
95 errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, blk_t blk)
99 unsigned long old_size;
101 EXT2_CHECK_MAGIC(bb, EXT2_ET_MAGIC_BADBLOCKS_LIST);
103 if (bb->num >= bb->size) {
104 old_size = bb->size * sizeof(blk_t);
106 retval = ext2fs_resize_mem(old_size, bb->size * sizeof(blk_t),
107 (void **) &bb->list);
115 * Add special case code for appending to the end of the list
118 if ((bb->num != 0) && (bb->list[i] == blk))
120 if ((bb->num == 0) || (bb->list[i] < blk)) {
121 bb->list[bb->num++] = blk;
126 for (i=0; i < bb->num; i++) {
127 if (bb->list[i] == blk)
129 if (bb->list[i] > blk) {
134 for (i=bb->num; i > j; i--)
135 bb->list[i] = bb->list[i-1];
142 * This procedure tests to see if a particular block is on a badblocks
145 int ext2fs_badblocks_list_test(ext2_badblocks_list bb, blk_t blk)
149 if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
157 if (blk == bb->list[low])
159 if (blk == bb->list[high])
164 if (mid == low || mid == high)
166 if (blk == bb->list[mid])
168 if (blk < bb->list[mid])
176 errcode_t ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb,
177 ext2_badblocks_iterate *ret)
179 ext2_badblocks_iterate iter;
182 EXT2_CHECK_MAGIC(bb, EXT2_ET_MAGIC_BADBLOCKS_LIST);
184 retval = ext2fs_get_mem(sizeof(struct ext2_struct_badblocks_iterate),
189 iter->magic = EXT2_ET_MAGIC_BADBLOCKS_ITERATE;
196 int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, blk_t *blk)
198 ext2_badblocks_list bb;
200 if (iter->magic != EXT2_ET_MAGIC_BADBLOCKS_ITERATE)
205 if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
208 if (iter->ptr < bb->num) {
209 *blk = bb->list[iter->ptr++];
216 void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter)
218 if (!iter || (iter->magic != EXT2_ET_MAGIC_BADBLOCKS_ITERATE))
222 ext2fs_free_mem((void **) &iter);
225 int ext2fs_badblocks_equal(ext2_badblocks_list bb1, ext2_badblocks_list bb2)
227 EXT2_CHECK_MAGIC(bb1, EXT2_ET_MAGIC_BADBLOCKS_LIST);
228 EXT2_CHECK_MAGIC(bb2, EXT2_ET_MAGIC_BADBLOCKS_LIST);
230 if (bb1->num != bb2->num)
233 if (memcmp(bb1->list, bb2->list, bb1->num * sizeof(blk_t)) != 0)