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 Library
8 * General Public License, version 2.
24 #include <sys/types.h>
31 * Helper function for making a badblocks list
33 static errcode_t make_u32_list(int size, int num, __u32 *list,
39 retval = ext2fs_get_mem(sizeof(struct ext2_struct_u32_list), &bb);
42 memset(bb, 0, sizeof(struct ext2_struct_u32_list));
43 bb->magic = EXT2_ET_MAGIC_BADBLOCKS_LIST;
44 bb->size = size ? size : 10;
46 retval = ext2fs_get_array(bb->size, sizeof(blk_t), &bb->list);
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 u32 list.
63 errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size)
65 return make_u32_list(size, 0, 0, ret);
69 * This procedure creates an empty badblocks list.
71 errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, int size)
73 return make_u32_list(size, 0, 0, (ext2_badblocks_list *) ret);
78 * This procedure copies a badblocks list
80 errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest)
84 retval = make_u32_list(src->size, src->num, src->list, dest);
87 (*dest)->badblocks_flags = src->badblocks_flags;
91 errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src,
92 ext2_badblocks_list *dest)
94 return ext2fs_u32_copy((ext2_u32_list) src,
95 (ext2_u32_list *) dest);
99 * This procedure frees a badblocks list.
101 * (note: moved to closefs.c)
106 * This procedure adds a block to a badblocks list.
108 errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk)
112 unsigned long old_size;
114 EXT2_CHECK_MAGIC(bb, EXT2_ET_MAGIC_BADBLOCKS_LIST);
116 if (bb->num >= bb->size) {
117 old_size = bb->size * sizeof(__u32);
119 retval = ext2fs_resize_mem(old_size, bb->size * sizeof(__u32),
128 * Add special case code for appending to the end of the list
131 if ((bb->num != 0) && (bb->list[i] == blk))
133 if ((bb->num == 0) || (bb->list[i] < blk)) {
134 bb->list[bb->num++] = blk;
139 for (i=0; i < bb->num; i++) {
140 if (bb->list[i] == blk)
142 if (bb->list[i] > blk) {
147 for (i=bb->num; i > j; i--)
148 bb->list[i] = bb->list[i-1];
154 errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, blk_t blk)
156 return ext2fs_u32_list_add((ext2_u32_list) bb, (__u32) blk);
160 * This procedure finds a particular block is on a badblocks
163 int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk)
167 if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
175 if (blk == bb->list[low])
177 if (blk == bb->list[high])
181 mid = ((unsigned)low + (unsigned)high)/2;
182 if (mid == low || mid == high)
184 if (blk == bb->list[mid])
186 if (blk < bb->list[mid])
195 * This procedure tests to see if a particular block is on a badblocks
198 int ext2fs_u32_list_test(ext2_u32_list bb, __u32 blk)
200 if (ext2fs_u32_list_find(bb, blk) < 0)
206 int ext2fs_badblocks_list_test(ext2_badblocks_list bb, blk_t blk)
208 return ext2fs_u32_list_test((ext2_u32_list) bb, (__u32) blk);
213 * Remove a block from the badblock list
215 int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk)
222 remloc = ext2fs_u32_list_find(bb, blk);
226 for (i = remloc ; i < bb->num-1; i++)
227 bb->list[i] = bb->list[i+1];
232 void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk)
234 ext2fs_u32_list_del(bb, blk);
237 errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb,
238 ext2_u32_iterate *ret)
240 ext2_u32_iterate iter;
243 EXT2_CHECK_MAGIC(bb, EXT2_ET_MAGIC_BADBLOCKS_LIST);
245 retval = ext2fs_get_mem(sizeof(struct ext2_struct_u32_iterate), &iter);
249 iter->magic = EXT2_ET_MAGIC_BADBLOCKS_ITERATE;
256 errcode_t ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb,
257 ext2_badblocks_iterate *ret)
259 return ext2fs_u32_list_iterate_begin((ext2_u32_list) bb,
260 (ext2_u32_iterate *) ret);
264 int ext2fs_u32_list_iterate(ext2_u32_iterate iter, __u32 *blk)
268 if (iter->magic != EXT2_ET_MAGIC_BADBLOCKS_ITERATE)
273 if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
276 if (iter->ptr < bb->num) {
277 *blk = bb->list[iter->ptr++];
284 int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, blk_t *blk)
286 return ext2fs_u32_list_iterate((ext2_u32_iterate) iter,
291 void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter)
293 if (!iter || (iter->magic != EXT2_ET_MAGIC_BADBLOCKS_ITERATE))
297 ext2fs_free_mem(&iter);
300 void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter)
302 ext2fs_u32_list_iterate_end((ext2_u32_iterate) iter);
306 int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2)
308 EXT2_CHECK_MAGIC(bb1, EXT2_ET_MAGIC_BADBLOCKS_LIST);
309 EXT2_CHECK_MAGIC(bb2, EXT2_ET_MAGIC_BADBLOCKS_LIST);
311 if (bb1->num != bb2->num)
314 if (memcmp(bb1->list, bb2->list, bb1->num * sizeof(blk_t)) != 0)
319 int ext2fs_badblocks_equal(ext2_badblocks_list bb1, ext2_badblocks_list bb2)
321 return ext2fs_u32_list_equal((ext2_u32_list) bb1,
322 (ext2_u32_list) bb2);
325 int ext2fs_u32_list_count(ext2_u32_list bb)