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- /*
- * badblocks.c --- routines to manipulate the bad block structure
- *
- * Copyright (C) 1994 Theodore Ts'o. This file may be redistributed
- * under the terms of the GNU Public License.
- */
-
- #include <stdio.h>
- #include <string.h>
- #include <unistd.h>
- #include <stdlib.h>
- #include <fcntl.h>
- #include <time.h>
- #include <errno.h>
- #include <sys/stat.h>
- #include <sys/types.h>
-
- #include <linux/ext2_fs.h>
-
- #include "ext2fs.h"
-
- /*
- * This procedure create an empty badblocks list.
- */
- errcode_t badblocks_list_create(badblocks_list *ret, int size)
- {
- badblocks_list bb;
-
- bb = malloc(sizeof(struct struct_badblocks_list));
- if (!bb)
- return ENOMEM;
- memset(bb, 0, sizeof(struct struct_badblocks_list));
- bb->magic = EXT2_ET_MAGIC_BADBLOCKS_LIST;
- bb->size = size ? size : 10;
- bb->list = malloc(bb->size * sizeof(blk_t));
- if (!bb->list) {
- free(bb);
- return ENOMEM;
- }
- *ret = bb;
- return 0;
- }
-
- /*
- * This procedure frees a badblocks list.
- */
- void badblocks_list_free(badblocks_list bb)
- {
- if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
- return;
-
- if (bb->list)
- free(bb->list);
- bb->list = 0;
- free(bb);
- }
-
- /*
- * This procedure adds a block to a badblocks list.
- */
- errcode_t badblocks_list_add(badblocks_list bb, blk_t blk)
- {
- int i;
-
- EXT2_CHECK_MAGIC(bb, EXT2_ET_MAGIC_BADBLOCKS_LIST);
-
- for (i=0; i < bb->num; i++)
- if (bb->list[i] == blk)
- return 0;
-
- if (bb->num >= bb->size) {
- bb->size += 10;
- bb->list = realloc(bb->list, bb->size * sizeof(blk_t));
- if (!bb->list) {
- bb->size = 0;
- bb->num = 0;
- return ENOMEM;
- }
- }
-
- bb->list[bb->num++] = blk;
- return 0;
- }
-
- /*
- * This procedure tests to see if a particular block is on a badblocks
- * list.
- */
- int badblocks_list_test(badblocks_list bb, blk_t blk)
- {
- int i;
-
- EXT2_CHECK_MAGIC(bb, EXT2_ET_MAGIC_BADBLOCKS_LIST);
-
- for (i=0; i < bb->num; i++)
- if (bb->list[i] == blk)
- return 1;
-
- return 0;
- }
-
- errcode_t badblocks_list_iterate_begin(badblocks_list bb,
- badblocks_iterate *ret)
- {
- badblocks_iterate iter;
-
- EXT2_CHECK_MAGIC(bb, EXT2_ET_MAGIC_BADBLOCKS_LIST);
-
- iter = malloc(sizeof(struct struct_badblocks_iterate));
- if (!iter)
- return ENOMEM;
-
- iter->magic = EXT2_ET_MAGIC_BADBLOCKS_ITERATE;
- iter->bb = bb;
- iter->ptr = 0;
- *ret = iter;
- return 0;
- }
-
- int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk)
- {
- badblocks_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;
- }
-
- void badblocks_list_iterate_end(badblocks_iterate iter)
- {
- if (!iter || (iter->magic != EXT2_ET_MAGIC_BADBLOCKS_ITERATE))
- return;
-
- iter->bb = 0;
- free(iter);
- }
-
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