1 files changed, 327 insertions, 0 deletions

diff --git a/e2fsprogs/ext2fs/badblocks.c b/e2fsprogs/ext2fs/badblocks.c
new file mode 100644
index 000000000..4b76ef032
--- /dev/null
+++ b/e2fsprogs/ext2fs/badblocks.c
@@ -0,0 +1,327 @@
+/*
+ * badblocks.c --- routines to manipulate the bad block structure
+ * 
+ * Copyright (C) 1994, 1995, 1996 Theodore Ts'o.
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Public
+ * License.
+ * %End-Header%
+ */
+
+#include <stdio.h>
+#include <string.h>
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <fcntl.h>
+#include <time.h>
+#if HAVE_SYS_STAT_H
+#include <sys/stat.h>
+#endif
+#if HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#include "ext2_fs.h"
+#include "ext2fsP.h"
+
+/*
+ * Helper function for making a badblocks list
+ */
+static errcode_t make_u32_list(int size, int num, __u32 *list,
+                               ext2_u32_list *ret)
+{
+        ext2_u32_list   bb;
+        errcode_t       retval;
+        
+        retval = ext2fs_get_mem(sizeof(struct ext2_struct_u32_list), &bb);
+        if (retval)
+                return retval;
+        memset(bb, 0, sizeof(struct ext2_struct_u32_list));
+        bb->magic = EXT2_ET_MAGIC_BADBLOCKS_LIST;
+        bb->size = size ? size : 10;
+        bb->num = num;
+        retval = ext2fs_get_mem(bb->size * sizeof(blk_t), &bb->list);
+        if (!bb->list) {
+                ext2fs_free_mem(&bb);
+                return retval;
+        }
+        if (list)
+                memcpy(bb->list, list, bb->size * sizeof(blk_t));
+        else
+                memset(bb->list, 0, bb->size * sizeof(blk_t));
+        *ret = bb;
+        return 0;
+}
+        
+
+/*
+ * This procedure creates an empty u32 list.
+ */
+errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size)
+{
+        return make_u32_list(size, 0, 0, ret);
+}
+
+/*
+ * This procedure creates an empty badblocks list.
+ */
+errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, int size)
+{
+        return make_u32_list(size, 0, 0, (ext2_badblocks_list *) ret);
+}
+
+
+/*
+ * This procedure copies a badblocks list
+ */
+errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest)
+{
+        errcode_t       retval;
+        
+        retval = make_u32_list(src->size, src->num, src->list, dest);
+        if (retval)
+                return retval;
+        (*dest)->badblocks_flags = src->badblocks_flags;
+        return 0;
+}
+
+errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src,
+                                ext2_badblocks_list *dest)
+{
+        return ext2fs_u32_copy((ext2_u32_list) src,
+                               (ext2_u32_list *) dest);
+}
+
+/*
+ * This procedure frees a badblocks list.
+ *
+ * (note: moved to closefs.c)
+ */
+
+
+/*
+ * This procedure adds a block to a badblocks list.
+ */
+errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk)
+{
+        errcode_t       retval;
+        int             i, j;
+        unsigned long   old_size;
+
+        EXT2_CHECK_MAGIC(bb, EXT2_ET_MAGIC_BADBLOCKS_LIST);
+
+        if (bb->num >= bb->size) {
+                old_size = bb->size * sizeof(__u32);
+                bb->size += 100;
+                retval = ext2fs_resize_mem(old_size, bb->size * sizeof(__u32),
+                                           &bb->list);
+                if (retval) {
+                        bb->size -= 100;
+                        return retval;
+                }
+        }
+
+        /*
+         * Add special case code for appending to the end of the list
+         */
+        i = bb->num-1;
+        if ((bb->num != 0) && (bb->list[i] == blk))
+                return 0;
+        if ((bb->num == 0) || (bb->list[i] < blk)) {
+                bb->list[bb->num++] = blk;
+                return 0;
+        }
+
+        j = bb->num;
+        for (i=0; i < bb->num; i++) {
+                if (bb->list[i] == blk)
+                        return 0;
+                if (bb->list[i] > blk) {
+                        j = i;
+                        break;
+                }
+        }
+        for (i=bb->num; i > j; i--)
+                bb->list[i] = bb->list[i-1];
+        bb->list[j] = blk;
+        bb->num++;
+        return 0;
+}
+
+errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, blk_t blk)
+{
+        return ext2fs_u32_list_add((ext2_u32_list) bb, (__u32) blk);
+}
+
+/*
+ * This procedure finds a particular block is on a badblocks
+ * list.
+ */
+int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk)
+{
+        int     low, high, mid;
+
+        if (bb->magic != EXT2_ET_MAGIC_BADBLOCKS_LIST)
+                return -1;
+
+        if (bb->num == 0)
+                return -1;
+
+        low = 0;
+        high = bb->num-1;
+        if (blk == bb->list[low])
+                return low;
+        if (blk == bb->list[high])
+                return high;
+
+        while (low < high) {
+                mid = (low+high)/2;
+                if (mid == low || mid == high)
+                        break;
+                if (blk == bb->list[mid])
+                        return mid;
+                if (blk < bb->list[mid])
+                        high = mid;
+                else
+                        low = mid;
+        }
+        return -1;
+}
+
+/*
+ * This procedure tests to see if a particular block is on a badblocks
+ * list.
+ */
+int ext2fs_u32_list_test(ext2_u32_list bb, __u32 blk)
+{
+        if (ext2fs_u32_list_find(bb, blk) < 0)
+                return 0;
+        else
+                return 1;
+}
+
+int ext2fs_badblocks_list_test(ext2_badblocks_list bb, blk_t blk)
+{
+        return ext2fs_u32_list_test((ext2_u32_list) bb, (__u32) blk);
+}
+
+
+/*
+ * Remove a block from the badblock list
+ */
+int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk)
+{
+        int     remloc, i;
+
+        if (bb->num == 0)
+                return -1;
+
+        remloc = ext2fs_u32_list_find(bb, blk);
+        if (remloc < 0)
+                return -1;
+
+        for (i = remloc ; i < bb->num-1; i++)
+                bb->list[i] = bb->list[i+1];
+        bb->num--;
+        return 0;
+}
+
+void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk)
+{
+        ext2fs_u32_list_del(bb, blk);
+}
+
+errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb,
+                                        ext2_u32_iterate *ret)
+{
+        ext2_u32_iterate iter;
+        errcode_t               retval;
+
+        EXT2_CHECK_MAGIC(bb, EXT2_ET_MAGIC_BADBLOCKS_LIST);
+
+        retval = ext2fs_get_mem(sizeof(struct ext2_struct_u32_iterate), &iter);
+        if (retval)
+                return retval;
+
+        iter->magic = EXT2_ET_MAGIC_BADBLOCKS_ITERATE;
+        iter->bb = bb;
+        iter->ptr = 0;
+        *ret = iter;
+        return 0;
+}
+
+errcode_t ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb,
+                                              ext2_badblocks_iterate *ret)
+{
+        return ext2fs_u32_list_iterate_begin((ext2_u32_list) bb,
+                                              (ext2_u32_iterate *) ret);
+}
+
+
+int ext2fs_u32_list_iterate(ext2_u32_iterate iter, __u32 *blk)
+{
+        ext2_u32_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;
+}
+
+int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, blk_t *blk)
+{
+        return ext2fs_u32_list_iterate((ext2_u32_iterate) iter,
+                                       (__u32 *) blk);
+}
+
+
+void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter)
+{
+        if (!iter || (iter->magic != EXT2_ET_MAGIC_BADBLOCKS_ITERATE))
+                return;
+
+        iter->bb = 0;
+        ext2fs_free_mem(&iter);
+}
+
+void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter)
+{
+        ext2fs_u32_list_iterate_end((ext2_u32_iterate) iter);
+}
+
+
+int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2)
+{
+        EXT2_CHECK_MAGIC(bb1, EXT2_ET_MAGIC_BADBLOCKS_LIST);
+        EXT2_CHECK_MAGIC(bb2, EXT2_ET_MAGIC_BADBLOCKS_LIST);
+
+        if (bb1->num != bb2->num)
+                return 0;
+
+        if (memcmp(bb1->list, bb2->list, bb1->num * sizeof(blk_t)) != 0)
+                return 0;
+        return 1;
+}
+
+int ext2fs_badblocks_equal(ext2_badblocks_list bb1, ext2_badblocks_list bb2)
+{
+        return ext2fs_u32_list_equal((ext2_u32_list) bb1,
+                                     (ext2_u32_list) bb2);
+}
+
+int ext2fs_u32_list_count(ext2_u32_list bb)
+{
+        return bb->num;
+}