/*
* 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 Library
* General Public License, version 2.
* %End-Header%
*/
#include "config.h"
#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"
#include "ext2fsP.h"
#include "bmap64.h"
void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap)
{
ext2fs_free_generic_bmap(bitmap);
}
void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap)
{
ext2fs_free_generic_bmap(bitmap);
}
errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src,
ext2fs_generic_bitmap *dest)
{
return (ext2fs_copy_generic_bmap(src, dest));
}
void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map)
{
ext2fs_set_generic_bmap_padding(map);
}
errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs,
const char *descr,
ext2fs_inode_bitmap *ret)
{
__u64 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 = (__u64)EXT2_INODES_PER_GROUP(fs->super) *
fs->group_desc_count;
/* Are we permitted to use new-style bitmaps? */
if (fs->flags & EXT2_FLAG_64BITS)
return (ext2fs_alloc_generic_bmap(fs,
EXT2_ET_MAGIC_INODE_BITMAP64,
fs->default_bitmap_type,
start, end, real_end, descr, ret));
/* Otherwise, check to see if the file system is small enough
* to use old-style 32-bit bitmaps */
if ((end > ~0U) || (real_end > ~0U))
return EXT2_ET_CANT_USE_LEGACY_BITMAPS;
return (ext2fs_make_generic_bitmap(EXT2_ET_MAGIC_INODE_BITMAP, fs,
start, end, real_end,
descr, 0,
(ext2fs_generic_bitmap *) ret));
}
errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs,
const char *descr,
ext2fs_block_bitmap *ret)
{
__u64 start, end, real_end;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
fs->write_bitmaps = ext2fs_write_bitmaps;
start = EXT2FS_B2C(fs, fs->super->s_first_data_block);
end = EXT2FS_B2C(fs, ext2fs_blocks_count(fs->super)-1);
real_end = ((__u64) EXT2_CLUSTERS_PER_GROUP(fs->super)
* (__u64) fs->group_desc_count)-1 + start;
if (fs->flags & EXT2_FLAG_64BITS)
return (ext2fs_alloc_generic_bmap(fs,
EXT2_ET_MAGIC_BLOCK_BITMAP64,
fs->default_bitmap_type,
start, end, real_end, descr, ret));
if ((end > ~0U) || (real_end > ~0U))
return EXT2_ET_CANT_USE_LEGACY_BITMAPS;
return (ext2fs_make_generic_bitmap(EXT2_ET_MAGIC_BLOCK_BITMAP, fs,
start, end, real_end,
descr, 0,
(ext2fs_generic_bitmap *) ret));
}
/*
* ext2fs_allocate_block_bitmap() really allocates a per-cluster
* bitmap for backwards compatibility. This function allocates a
* block bitmap which is truly per-block, even if clusters/bigalloc
* are enabled. mke2fs and e2fsck need this for tracking the
* allocation of the file system metadata blocks.
*/
errcode_t ext2fs_allocate_subcluster_bitmap(ext2_filsys fs,
const char *descr,
ext2fs_block_bitmap *ret)
{
__u64 start, end, real_end;
ext2fs_generic_bitmap bmap;
errcode_t retval;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
fs->write_bitmaps = ext2fs_write_bitmaps;
if (!fs->cluster_ratio_bits)
return ext2fs_allocate_block_bitmap(fs, descr, ret);
if ((fs->flags & EXT2_FLAG_64BITS) == 0)
return EXT2_ET_CANT_USE_LEGACY_BITMAPS;
start = fs->super->s_first_data_block;
end = ext2fs_blocks_count(fs->super)-1;
real_end = ((__u64) EXT2_BLOCKS_PER_GROUP(fs->super)
* (__u64) fs->group_desc_count)-1 + start;
retval = ext2fs_alloc_generic_bmap(fs, EXT2_ET_MAGIC_BLOCK_BITMAP64,
fs->default_bitmap_type, start,
end, real_end, descr, &bmap);
if (retval)
return retval;
bmap->cluster_bits = 0;
*ret = bmap;
return 0;
}
int ext2fs_get_bitmap_granularity(ext2fs_block_bitmap bitmap)
{
ext2fs_generic_bitmap bmap = bitmap;
if (!EXT2FS_IS_64_BITMAP(bmap))
return 0;
return bmap->cluster_bits;
}
errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap,
ext2_ino_t end, ext2_ino_t *oend)
{
__u64 tmp_oend;
int retval;
retval = ext2fs_fudge_generic_bmap_end((ext2fs_generic_bitmap) bitmap,
EXT2_ET_FUDGE_INODE_BITMAP_END,
end, &tmp_oend);
if (oend)
*oend = tmp_oend;
return retval;
}
errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap,
blk_t end, blk_t *oend)
{
return (ext2fs_fudge_generic_bitmap_end(bitmap,
EXT2_ET_MAGIC_BLOCK_BITMAP,
EXT2_ET_FUDGE_BLOCK_BITMAP_END,
end, oend));
}
errcode_t ext2fs_fudge_block_bitmap_end2(ext2fs_block_bitmap bitmap,
blk64_t end, blk64_t *oend)
{
return (ext2fs_fudge_generic_bmap_end(bitmap,
EXT2_ET_FUDGE_BLOCK_BITMAP_END,
end, oend));
}
void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap)
{
ext2fs_clear_generic_bmap(bitmap);
}
void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap)
{
ext2fs_clear_generic_bmap(bitmap);
}
errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end,
ext2fs_inode_bitmap bmap)
{
return (ext2fs_resize_generic_bitmap(EXT2_ET_MAGIC_INODE_BITMAP,
new_end, new_real_end, bmap));
}
errcode_t ext2fs_resize_inode_bitmap2(__u64 new_end, __u64 new_real_end,
ext2fs_inode_bitmap bmap)
{
return (ext2fs_resize_generic_bmap(bmap, new_end, new_real_end));
}
errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end,
ext2fs_block_bitmap bmap)
{
return (ext2fs_resize_generic_bitmap(EXT2_ET_MAGIC_BLOCK_BITMAP,
new_end, new_real_end, bmap));
}
errcode_t ext2fs_resize_block_bitmap2(__u64 new_end, __u64 new_real_end,
ext2fs_block_bitmap bmap)
{
return (ext2fs_resize_generic_bmap(bmap, new_end, new_real_end));
}
errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1,
ext2fs_block_bitmap bm2)
{
return (ext2fs_compare_generic_bmap(EXT2_ET_NEQ_BLOCK_BITMAP,
bm1, bm2));
}
errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1,
ext2fs_inode_bitmap bm2)
{
return (ext2fs_compare_generic_bmap(EXT2_ET_NEQ_INODE_BITMAP,
bm1, bm2));
}
errcode_t ext2fs_set_inode_bitmap_range(ext2fs_inode_bitmap bmap,
ext2_ino_t start, unsigned int num,
void *in)
{
return (ext2fs_set_generic_bitmap_range(bmap,
EXT2_ET_MAGIC_INODE_BITMAP,
start, num, in));
}
errcode_t ext2fs_set_inode_bitmap_range2(ext2fs_inode_bitmap bmap,
__u64 start, size_t num,
void *in)
{
return (ext2fs_set_generic_bmap_range(bmap, start, num, in));
}
errcode_t ext2fs_get_inode_bitmap_range(ext2fs_inode_bitmap bmap,
ext2_ino_t start, unsigned int num,
void *out)
{
return (ext2fs_get_generic_bitmap_range(bmap,
EXT2_ET_MAGIC_INODE_BITMAP,
start, num, out));
}
errcode_t ext2fs_get_inode_bitmap_range2(ext2fs_inode_bitmap bmap,
__u64 start, size_t num,
void *out)
{
return (ext2fs_get_generic_bmap_range(bmap, start, num, out));
}
errcode_t ext2fs_set_block_bitmap_range(ext2fs_block_bitmap bmap,
blk_t start, unsigned int num,
void *in)
{
return (ext2fs_set_generic_bitmap_range(bmap,
EXT2_ET_MAGIC_BLOCK_BITMAP,
start, num, in));
}
errcode_t ext2fs_set_block_bitmap_range2(ext2fs_block_bitmap bmap,
blk64_t start, size_t num,
void *in)
{
return (ext2fs_set_generic_bmap_range(bmap, start, num, in));
}
errcode_t ext2fs_get_block_bitmap_range(ext2fs_block_bitmap bmap,
blk_t start, unsigned int num,
void *out)
{
return (ext2fs_get_generic_bitmap_range(bmap,
EXT2_ET_MAGIC_BLOCK_BITMAP,
start, num, out));
}
errcode_t ext2fs_get_block_bitmap_range2(ext2fs_block_bitmap bmap,
blk64_t start, size_t num,
void *out)
{
return (ext2fs_get_generic_bmap_range(bmap, start, num, out));
}