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>
26 #include <linux/ext2_fs.h>
31 * Helper function for making a badblocks list
33 static errcode_t make_badblocks_list(int size, int num, blk_t *list,
34 ext2_badblocks_list *ret)
36 ext2_badblocks_list bb;
39 retval = ext2fs_get_mem(sizeof(struct ext2_struct_badblocks_list),
43 memset(bb, 0, sizeof(struct ext2_struct_badblocks_list));
44 bb->magic = EXT2_ET_MAGIC_BADBLOCKS_LIST;
45 bb->size = size ? size : 10;
47 retval = ext2fs_get_mem(bb->size * sizeof(blk_t), (void **) &bb->list);
49 ext2fs_free_mem((void **) &bb);
53 memcpy(bb->list, list, bb->size * sizeof(blk_t));
55 memset(bb->list, 0, bb->size * sizeof(blk_t));
62 * This procedure creates an empty badblocks list.
64 errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, int size)
66 return make_badblocks_list(size, 0, 0, ret);
70 * This procedure copies a badblocks list
72 errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src,
73 ext2_badblocks_list *dest)
77 retval = make_badblocks_list(src->size, src->num, src->list,
81 (*dest)->badblocks_flags = src->badblocks_flags;
87 * This procedure frees a badblocks list.
89 * (note: moved to closefs.c)
94 * This procedure adds a block to a badblocks list.
96 errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, blk_t blk)
101 EXT2_CHECK_MAGIC(bb, EXT2_ET_MAGIC_BADBLOCKS_LIST);
103 if (bb->num >= bb->size) {
105 retval = ext2fs_resize_mem(bb->size * sizeof(blk_t),
106 (void **) &bb->list);
112 for (i=0; i < bb->num; i++) {
113 if (bb->list[i] == blk)
115 if (bb->list[i] > blk) {
120 for (i=bb->num; i > j; i--)
121 bb->list[i] = bb->list[i-1];
128 * This procedure tests to see if a particular block is on a badblocks
131 int ext2fs_badblocks_list_test(ext2_badblocks_list bb, blk_t blk)
135 if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
143 if (blk == bb->list[low])
145 if (blk == bb->list[high])
150 if (mid == low || mid == high)
152 if (blk == bb->list[mid])
154 if (blk < bb->list[mid])
162 errcode_t ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb,
163 ext2_badblocks_iterate *ret)
165 ext2_badblocks_iterate iter;
168 EXT2_CHECK_MAGIC(bb, EXT2_ET_MAGIC_BADBLOCKS_LIST);
170 retval = ext2fs_get_mem(sizeof(struct ext2_struct_badblocks_iterate),
175 iter->magic = EXT2_ET_MAGIC_BADBLOCKS_ITERATE;
182 int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, blk_t *blk)
184 ext2_badblocks_list bb;
186 if (iter->magic != EXT2_ET_MAGIC_BADBLOCKS_ITERATE)
191 if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
194 if (iter->ptr < bb->num) {
195 *blk = bb->list[iter->ptr++];
202 void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter)
204 if (!iter || (iter->magic != EXT2_ET_MAGIC_BADBLOCKS_ITERATE))
208 ext2fs_free_mem((void **) &iter);