diff options
Diffstat (limited to 'e2fsprogs/ext2fs/bitmaps.c')
| -rw-r--r-- | e2fsprogs/ext2fs/bitmaps.c | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/e2fsprogs/ext2fs/bitmaps.c b/e2fsprogs/ext2fs/bitmaps.c deleted file mode 100644 index 712a4a9..0000000 --- a/e2fsprogs/ext2fs/bitmaps.c +++ /dev/null @@ -1,213 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * bitmaps.c --- routines to read, write, and manipulate the inode and - * block bitmaps. - * - * Copyright (C) 1993, 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 "ext2fs.h" - -static errcode_t make_bitmap(__u32 start, __u32 end, __u32 real_end, - const char *descr, char *init_map, - ext2fs_generic_bitmap *ret) -{ - ext2fs_generic_bitmap bitmap; - errcode_t retval; - size_t size; - - retval = ext2fs_get_mem(sizeof(struct ext2fs_struct_generic_bitmap), - &bitmap); - if (retval) - return retval; - - bitmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP; - bitmap->fs = NULL; - bitmap->start = start; - bitmap->end = end; - bitmap->real_end = real_end; - bitmap->base_error_code = EXT2_ET_BAD_GENERIC_MARK; - if (descr) { - retval = ext2fs_get_mem(strlen(descr)+1, &bitmap->description); - if (retval) { - ext2fs_free_mem(&bitmap); - return retval; - } - strcpy(bitmap->description, descr); - } else - bitmap->description = 0; - - size = (size_t) (((bitmap->real_end - bitmap->start) / 8) + 1); - retval = ext2fs_get_mem(size, &bitmap->bitmap); - if (retval) { - ext2fs_free_mem(&bitmap->description); - ext2fs_free_mem(&bitmap); - return retval; - } - - if (init_map) - memcpy(bitmap->bitmap, init_map, size); - else - memset(bitmap->bitmap, 0, size); - *ret = bitmap; - return 0; -} - -errcode_t ext2fs_allocate_generic_bitmap(__u32 start, - __u32 end, - __u32 real_end, - const char *descr, - ext2fs_generic_bitmap *ret) -{ - return make_bitmap(start, end, real_end, descr, 0, ret); -} - -errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src, - ext2fs_generic_bitmap *dest) -{ - errcode_t retval; - ext2fs_generic_bitmap new_map; - - retval = make_bitmap(src->start, src->end, src->real_end, - src->description, src->bitmap, &new_map); - if (retval) - return retval; - new_map->magic = src->magic; - new_map->fs = src->fs; - new_map->base_error_code = src->base_error_code; - *dest = new_map; - return 0; -} - -void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map) -{ - __u32 i, j; - - for (i=map->end+1, j = i - map->start; i <= map->real_end; i++, j++) - ext2fs_set_bit(j, map->bitmap); - - return; -} - -errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs, - const char *descr, - ext2fs_inode_bitmap *ret) -{ - ext2fs_inode_bitmap bitmap; - errcode_t retval; - __u32 start, end, real_end; - - EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); - - fs->write_bitmaps = ext2fs_write_bitmaps; - - start = 1; - end = fs->super->s_inodes_count; - real_end = (EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count); - - retval = ext2fs_allocate_generic_bitmap(start, end, real_end, - descr, &bitmap); - if (retval) - return retval; - - bitmap->magic = EXT2_ET_MAGIC_INODE_BITMAP; - bitmap->fs = fs; - bitmap->base_error_code = EXT2_ET_BAD_INODE_MARK; - - *ret = bitmap; - return 0; -} - -errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs, - const char *descr, - ext2fs_block_bitmap *ret) -{ - ext2fs_block_bitmap bitmap; - errcode_t retval; - __u32 start, end, real_end; - - EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); - - fs->write_bitmaps = ext2fs_write_bitmaps; - - start = fs->super->s_first_data_block; - end = fs->super->s_blocks_count-1; - real_end = (EXT2_BLOCKS_PER_GROUP(fs->super) - * fs->group_desc_count)-1 + start; - - retval = ext2fs_allocate_generic_bitmap(start, end, real_end, - descr, &bitmap); - if (retval) - return retval; - - bitmap->magic = EXT2_ET_MAGIC_BLOCK_BITMAP; - bitmap->fs = fs; - bitmap->base_error_code = EXT2_ET_BAD_BLOCK_MARK; - - *ret = bitmap; - return 0; -} - -errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap, - ext2_ino_t end, ext2_ino_t *oend) -{ - EXT2_CHECK_MAGIC(bitmap, EXT2_ET_MAGIC_INODE_BITMAP); - - if (end > bitmap->real_end) - return EXT2_ET_FUDGE_INODE_BITMAP_END; - if (oend) - *oend = bitmap->end; - bitmap->end = end; - return 0; -} - -errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap, - blk_t end, blk_t *oend) -{ - EXT2_CHECK_MAGIC(bitmap, EXT2_ET_MAGIC_BLOCK_BITMAP); - - if (end > bitmap->real_end) - return EXT2_ET_FUDGE_BLOCK_BITMAP_END; - if (oend) - *oend = bitmap->end; - bitmap->end = end; - return 0; -} - -void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap) -{ - if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_INODE_BITMAP)) - return; - - memset(bitmap->bitmap, 0, - (size_t) (((bitmap->real_end - bitmap->start) / 8) + 1)); -} - -void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap) -{ - if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_BLOCK_BITMAP)) - return; - - memset(bitmap->bitmap, 0, - (size_t) (((bitmap->real_end - bitmap->start) / 8) + 1)); -} |