1997-04-26 17:21:57 +04:00
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/*
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* bitmaps.c --- routines to read, write, and manipulate the inode and
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* block bitmaps.
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*
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1997-04-29 20:15:03 +04:00
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* Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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1997-04-26 17:21:57 +04:00
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*/
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#include <stdio.h>
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#include <string.h>
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1997-08-11 03:07:40 +04:00
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#if HAVE_UNISTD_H
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1997-04-26 17:21:57 +04:00
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#include <unistd.h>
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1997-08-11 03:07:40 +04:00
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#endif
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1997-04-26 17:21:57 +04:00
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#include <fcntl.h>
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#include <time.h>
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1997-10-20 03:00:21 +04:00
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#if HAVE_SYS_STAT_H
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1997-04-26 17:21:57 +04:00
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#include <sys/stat.h>
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1997-10-20 03:00:21 +04:00
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#endif
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#if HAVE_SYS_TYPES_H
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1997-04-26 17:21:57 +04:00
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#include <sys/types.h>
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1997-10-20 03:00:21 +04:00
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#endif
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1997-04-26 17:21:57 +04:00
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Many files:
inode.c (ext2fs_open_inode_scan): Initialize the group variables
so that we don't need to call get_next_blockgroup() the first
time around. Saves a bit of time, and prevents us from
needing to assign -1 to current_group (which is an unsigned
value).
icount.c (insert_icount_el): Cast the estimated number of inodes
from a float to an ino_t.
alloc.c, alloc_tables.c, badlbocks.c, bb_compat.c, bb_inode.c,
bitmaps.c, bitops.c, block.c, bmap.c, bmove.c, brel_ma.c,
check_desc.c, closefs.c, cmp_bitmaps.c, dblist.c,
dblist_dir.c, dir_iterate.c, dirblock.c, dupfs.c, expanddir.c,
ext2fs.h, fileio.c, freefs.c, get_pathname.c, getsize.c,
icount.c, initialize.c, inline.c, inode.c, irel_ma.c,
ismounted.c, link.c, lookup.c, mkdir.c, namei.c, native.c,
newdir.c, openfs.c, read_bb.c, read_bb_file.c, rs_bitmap.c,
rw_bitmaps.c, swapfs.c, test_io.c, tst_badblocks.c,
tst_getsize.c, tst_iscan.c, unix_io.c, unlink.c, valid_blk.c,
version.c: If EXT2_FLAT_INCLUDES is defined, then assume all
of the ext2-specific header files are in a flat directory.
block.c, bmove.c, dirblock.c, fileio.c: Explicitly cast
all assignments from void * to be compatible with C++.
closefs.c (ext2fs_flush): Add a call to io_channel_flush() to
make sure the contents of the disk are flushed to disk.
dblist.c (ext2fs_add_dir_block): Change new to be new_entry to
avoid C++ namespace clash.
bitmaps.c (ext2fs_copy_bitmap): Change new to be new_map to
avoid C++ namespace clash.
ext2fs.h, bb_inode.c, block.c, bmove.c, brel.h, brel_ma.c,
irel.h, irel_ma.c, dblist.c, dblist_dir.c, dir_iterate.c,
ext2fsP.h, expanddir.c, get_pathname.c, inode.c, link.c,
unlink.c: Change private to be priv_data (to avoid C++
namespace clash)
1998-01-19 17:47:53 +03:00
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#include "ext2_fs.h"
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1997-04-26 17:21:57 +04:00
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#include "ext2fs.h"
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1997-04-30 01:26:48 +04:00
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static errcode_t make_bitmap(__u32 start, __u32 end, __u32 real_end,
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const char *descr, char *init_map,
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ext2fs_generic_bitmap *ret)
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1997-04-26 17:21:57 +04:00
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{
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1997-10-26 06:41:24 +03:00
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ext2fs_generic_bitmap bitmap;
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errcode_t retval;
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size_t size;
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1997-04-26 17:21:57 +04:00
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2003-08-01 17:41:07 +04:00
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retval = ext2fs_get_mem(sizeof(struct ext2fs_struct_generic_bitmap),
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&bitmap);
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1997-10-26 06:41:24 +03:00
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if (retval)
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return retval;
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1997-04-26 17:34:30 +04:00
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1997-04-29 18:53:37 +04:00
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bitmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP;
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bitmap->fs = NULL;
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bitmap->start = start;
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bitmap->end = end;
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bitmap->real_end = real_end;
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bitmap->base_error_code = EXT2_ET_BAD_GENERIC_MARK;
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1997-04-26 17:34:30 +04:00
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if (descr) {
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2003-08-01 17:41:07 +04:00
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retval = ext2fs_get_mem(strlen(descr)+1, &bitmap->description);
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1997-10-26 06:41:24 +03:00
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if (retval) {
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2003-08-01 17:41:07 +04:00
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ext2fs_free_mem(&bitmap);
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1997-10-26 06:41:24 +03:00
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return retval;
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1997-04-26 17:21:57 +04:00
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}
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1997-04-26 17:34:30 +04:00
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strcpy(bitmap->description, descr);
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} else
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bitmap->description = 0;
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1997-08-11 03:07:40 +04:00
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size = (size_t) (((bitmap->real_end - bitmap->start) / 8) + 1);
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2003-08-01 17:41:07 +04:00
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retval = ext2fs_get_mem(size, &bitmap->bitmap);
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1997-10-26 06:41:24 +03:00
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if (retval) {
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2003-08-01 17:41:07 +04:00
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ext2fs_free_mem(&bitmap->description);
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ext2fs_free_mem(&bitmap);
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1997-10-26 06:41:24 +03:00
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return retval;
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1997-04-26 17:21:57 +04:00
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}
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1997-04-26 17:34:30 +04:00
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1997-04-30 01:26:48 +04:00
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if (init_map)
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memcpy(bitmap->bitmap, init_map, size);
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else
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memset(bitmap->bitmap, 0, size);
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1997-04-26 17:34:30 +04:00
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*ret = bitmap;
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1997-04-26 17:21:57 +04:00
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return 0;
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}
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1997-04-30 01:26:48 +04:00
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errcode_t ext2fs_allocate_generic_bitmap(__u32 start,
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__u32 end,
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__u32 real_end,
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const char *descr,
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ext2fs_generic_bitmap *ret)
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{
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return make_bitmap(start, end, real_end, descr, 0, ret);
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}
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errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src,
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ext2fs_generic_bitmap *dest)
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{
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errcode_t retval;
|
Many files:
inode.c (ext2fs_open_inode_scan): Initialize the group variables
so that we don't need to call get_next_blockgroup() the first
time around. Saves a bit of time, and prevents us from
needing to assign -1 to current_group (which is an unsigned
value).
icount.c (insert_icount_el): Cast the estimated number of inodes
from a float to an ino_t.
alloc.c, alloc_tables.c, badlbocks.c, bb_compat.c, bb_inode.c,
bitmaps.c, bitops.c, block.c, bmap.c, bmove.c, brel_ma.c,
check_desc.c, closefs.c, cmp_bitmaps.c, dblist.c,
dblist_dir.c, dir_iterate.c, dirblock.c, dupfs.c, expanddir.c,
ext2fs.h, fileio.c, freefs.c, get_pathname.c, getsize.c,
icount.c, initialize.c, inline.c, inode.c, irel_ma.c,
ismounted.c, link.c, lookup.c, mkdir.c, namei.c, native.c,
newdir.c, openfs.c, read_bb.c, read_bb_file.c, rs_bitmap.c,
rw_bitmaps.c, swapfs.c, test_io.c, tst_badblocks.c,
tst_getsize.c, tst_iscan.c, unix_io.c, unlink.c, valid_blk.c,
version.c: If EXT2_FLAT_INCLUDES is defined, then assume all
of the ext2-specific header files are in a flat directory.
block.c, bmove.c, dirblock.c, fileio.c: Explicitly cast
all assignments from void * to be compatible with C++.
closefs.c (ext2fs_flush): Add a call to io_channel_flush() to
make sure the contents of the disk are flushed to disk.
dblist.c (ext2fs_add_dir_block): Change new to be new_entry to
avoid C++ namespace clash.
bitmaps.c (ext2fs_copy_bitmap): Change new to be new_map to
avoid C++ namespace clash.
ext2fs.h, bb_inode.c, block.c, bmove.c, brel.h, brel_ma.c,
irel.h, irel_ma.c, dblist.c, dblist_dir.c, dir_iterate.c,
ext2fsP.h, expanddir.c, get_pathname.c, inode.c, link.c,
unlink.c: Change private to be priv_data (to avoid C++
namespace clash)
1998-01-19 17:47:53 +03:00
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ext2fs_generic_bitmap new_map;
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1997-04-30 01:26:48 +04:00
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retval = make_bitmap(src->start, src->end, src->real_end,
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Many files:
inode.c (ext2fs_open_inode_scan): Initialize the group variables
so that we don't need to call get_next_blockgroup() the first
time around. Saves a bit of time, and prevents us from
needing to assign -1 to current_group (which is an unsigned
value).
icount.c (insert_icount_el): Cast the estimated number of inodes
from a float to an ino_t.
alloc.c, alloc_tables.c, badlbocks.c, bb_compat.c, bb_inode.c,
bitmaps.c, bitops.c, block.c, bmap.c, bmove.c, brel_ma.c,
check_desc.c, closefs.c, cmp_bitmaps.c, dblist.c,
dblist_dir.c, dir_iterate.c, dirblock.c, dupfs.c, expanddir.c,
ext2fs.h, fileio.c, freefs.c, get_pathname.c, getsize.c,
icount.c, initialize.c, inline.c, inode.c, irel_ma.c,
ismounted.c, link.c, lookup.c, mkdir.c, namei.c, native.c,
newdir.c, openfs.c, read_bb.c, read_bb_file.c, rs_bitmap.c,
rw_bitmaps.c, swapfs.c, test_io.c, tst_badblocks.c,
tst_getsize.c, tst_iscan.c, unix_io.c, unlink.c, valid_blk.c,
version.c: If EXT2_FLAT_INCLUDES is defined, then assume all
of the ext2-specific header files are in a flat directory.
block.c, bmove.c, dirblock.c, fileio.c: Explicitly cast
all assignments from void * to be compatible with C++.
closefs.c (ext2fs_flush): Add a call to io_channel_flush() to
make sure the contents of the disk are flushed to disk.
dblist.c (ext2fs_add_dir_block): Change new to be new_entry to
avoid C++ namespace clash.
bitmaps.c (ext2fs_copy_bitmap): Change new to be new_map to
avoid C++ namespace clash.
ext2fs.h, bb_inode.c, block.c, bmove.c, brel.h, brel_ma.c,
irel.h, irel_ma.c, dblist.c, dblist_dir.c, dir_iterate.c,
ext2fsP.h, expanddir.c, get_pathname.c, inode.c, link.c,
unlink.c: Change private to be priv_data (to avoid C++
namespace clash)
1998-01-19 17:47:53 +03:00
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src->description, src->bitmap, &new_map);
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1997-04-30 01:26:48 +04:00
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if (retval)
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return retval;
|
Many files:
inode.c (ext2fs_open_inode_scan): Initialize the group variables
so that we don't need to call get_next_blockgroup() the first
time around. Saves a bit of time, and prevents us from
needing to assign -1 to current_group (which is an unsigned
value).
icount.c (insert_icount_el): Cast the estimated number of inodes
from a float to an ino_t.
alloc.c, alloc_tables.c, badlbocks.c, bb_compat.c, bb_inode.c,
bitmaps.c, bitops.c, block.c, bmap.c, bmove.c, brel_ma.c,
check_desc.c, closefs.c, cmp_bitmaps.c, dblist.c,
dblist_dir.c, dir_iterate.c, dirblock.c, dupfs.c, expanddir.c,
ext2fs.h, fileio.c, freefs.c, get_pathname.c, getsize.c,
icount.c, initialize.c, inline.c, inode.c, irel_ma.c,
ismounted.c, link.c, lookup.c, mkdir.c, namei.c, native.c,
newdir.c, openfs.c, read_bb.c, read_bb_file.c, rs_bitmap.c,
rw_bitmaps.c, swapfs.c, test_io.c, tst_badblocks.c,
tst_getsize.c, tst_iscan.c, unix_io.c, unlink.c, valid_blk.c,
version.c: If EXT2_FLAT_INCLUDES is defined, then assume all
of the ext2-specific header files are in a flat directory.
block.c, bmove.c, dirblock.c, fileio.c: Explicitly cast
all assignments from void * to be compatible with C++.
closefs.c (ext2fs_flush): Add a call to io_channel_flush() to
make sure the contents of the disk are flushed to disk.
dblist.c (ext2fs_add_dir_block): Change new to be new_entry to
avoid C++ namespace clash.
bitmaps.c (ext2fs_copy_bitmap): Change new to be new_map to
avoid C++ namespace clash.
ext2fs.h, bb_inode.c, block.c, bmove.c, brel.h, brel_ma.c,
irel.h, irel_ma.c, dblist.c, dblist_dir.c, dir_iterate.c,
ext2fsP.h, expanddir.c, get_pathname.c, inode.c, link.c,
unlink.c: Change private to be priv_data (to avoid C++
namespace clash)
1998-01-19 17:47:53 +03:00
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new_map->magic = src->magic;
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new_map->fs = src->fs;
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new_map->base_error_code = src->base_error_code;
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*dest = new_map;
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1997-04-30 01:26:48 +04:00
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return 0;
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}
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1997-09-13 04:32:29 +04:00
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void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map)
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{
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__u32 i, j;
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2006-08-30 10:16:55 +04:00
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/* Protect loop from wrap-around if map->real_end is maxed */
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for (i=map->end+1, j = i - map->start;
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i <= map->real_end && i > map->end;
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i++, j++)
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1997-09-13 04:32:29 +04:00
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ext2fs_set_bit(j, map->bitmap);
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return;
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}
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1997-04-30 01:26:48 +04:00
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1997-04-29 18:53:37 +04:00
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errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs,
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const char *descr,
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ext2fs_inode_bitmap *ret)
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{
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ext2fs_inode_bitmap bitmap;
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errcode_t retval;
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__u32 start, end, real_end;
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EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
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fs->write_bitmaps = ext2fs_write_bitmaps;
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start = 1;
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end = fs->super->s_inodes_count;
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real_end = (EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count);
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retval = ext2fs_allocate_generic_bitmap(start, end, real_end,
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descr, &bitmap);
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if (retval)
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return retval;
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bitmap->magic = EXT2_ET_MAGIC_INODE_BITMAP;
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bitmap->fs = fs;
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bitmap->base_error_code = EXT2_ET_BAD_INODE_MARK;
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*ret = bitmap;
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return 0;
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}
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1997-04-26 17:34:30 +04:00
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errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs,
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const char *descr,
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ext2fs_block_bitmap *ret)
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1997-04-26 17:21:57 +04:00
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{
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1997-04-26 17:34:30 +04:00
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ext2fs_block_bitmap bitmap;
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1997-04-29 18:53:37 +04:00
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errcode_t retval;
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__u32 start, end, real_end;
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1997-04-26 17:21:57 +04:00
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1997-04-26 17:34:30 +04:00
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EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
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1997-04-26 17:21:57 +04:00
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1997-04-26 17:34:30 +04:00
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fs->write_bitmaps = ext2fs_write_bitmaps;
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1997-04-26 17:21:57 +04:00
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1997-04-29 18:53:37 +04:00
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start = fs->super->s_first_data_block;
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end = fs->super->s_blocks_count-1;
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real_end = (EXT2_BLOCKS_PER_GROUP(fs->super)
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* fs->group_desc_count)-1 + start;
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retval = ext2fs_allocate_generic_bitmap(start, end, real_end,
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descr, &bitmap);
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if (retval)
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return retval;
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1997-04-26 17:21:57 +04:00
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1997-04-26 17:34:30 +04:00
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bitmap->magic = EXT2_ET_MAGIC_BLOCK_BITMAP;
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bitmap->fs = fs;
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1997-04-29 18:53:37 +04:00
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bitmap->base_error_code = EXT2_ET_BAD_BLOCK_MARK;
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1997-04-26 17:34:30 +04:00
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*ret = bitmap;
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1997-04-26 17:21:57 +04:00
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return 0;
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}
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1997-04-26 17:34:30 +04:00
|
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|
errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap,
|
Many files:
alloc.c, bb_inode.c, bitmaps.c, bitops.h, block.c, bmap.c, bmove.c,
brel.h, cmp_bitmaps.c, dblist.c, dblist_dir.c, dir_iterate.c,
expanddir.c, ext2fs.h, ext2fsP.h, fileio.c, finddev.c, get_pathname.c,
icount.c, inode.c, irel.h, irel_ma.c, ismounted.c, link.c, lookup.c,
mkdir.c, mkjournal.c, namei.c, newdir.c, read_bb_file.c, test_io.c,
tst_iscan.c, unix_io.c, unlink.c: Change use of ino_t to ext2_ino_t,
to protect applications that attempt to compile
-D_FILE_OFFSET_BITS=64, since this inexplicably changes ino_t(!?). So
we use ext2_ino_t to avoid an unexpected ABI change.
2001-01-11 07:54:39 +03:00
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|
ext2_ino_t end, ext2_ino_t *oend)
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1997-04-26 17:21:57 +04:00
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{
|
1997-04-26 17:34:30 +04:00
|
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|
EXT2_CHECK_MAGIC(bitmap, EXT2_ET_MAGIC_INODE_BITMAP);
|
1997-04-26 17:21:57 +04:00
|
|
|
|
1997-04-26 17:34:30 +04:00
|
|
|
if (end > bitmap->real_end)
|
|
|
|
return EXT2_ET_FUDGE_INODE_BITMAP_END;
|
|
|
|
if (oend)
|
|
|
|
*oend = bitmap->end;
|
|
|
|
bitmap->end = end;
|
|
|
|
return 0;
|
1997-04-26 17:21:57 +04:00
|
|
|
}
|
|
|
|
|
1997-04-26 17:34:30 +04:00
|
|
|
errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap,
|
|
|
|
blk_t end, blk_t *oend)
|
1997-04-26 17:21:57 +04:00
|
|
|
{
|
1997-04-26 17:34:30 +04:00
|
|
|
EXT2_CHECK_MAGIC(bitmap, EXT2_ET_MAGIC_BLOCK_BITMAP);
|
1997-04-26 17:21:57 +04:00
|
|
|
|
1997-04-26 17:34:30 +04:00
|
|
|
if (end > bitmap->real_end)
|
|
|
|
return EXT2_ET_FUDGE_BLOCK_BITMAP_END;
|
|
|
|
if (oend)
|
|
|
|
*oend = bitmap->end;
|
|
|
|
bitmap->end = end;
|
1997-04-26 17:21:57 +04:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
1997-04-26 17:34:30 +04:00
|
|
|
void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap)
|
1997-04-26 17:21:57 +04:00
|
|
|
{
|
1997-04-26 17:34:30 +04:00
|
|
|
if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_INODE_BITMAP))
|
|
|
|
return;
|
1997-04-26 17:21:57 +04:00
|
|
|
|
1997-04-26 17:34:30 +04:00
|
|
|
memset(bitmap->bitmap, 0,
|
1997-08-11 03:07:40 +04:00
|
|
|
(size_t) (((bitmap->real_end - bitmap->start) / 8) + 1));
|
1997-04-26 17:21:57 +04:00
|
|
|
}
|
|
|
|
|
1997-04-26 17:34:30 +04:00
|
|
|
void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap)
|
1997-04-26 17:21:57 +04:00
|
|
|
{
|
1997-04-26 17:34:30 +04:00
|
|
|
if (!bitmap || (bitmap->magic != EXT2_ET_MAGIC_BLOCK_BITMAP))
|
|
|
|
return;
|
1997-04-26 17:21:57 +04:00
|
|
|
|
1997-04-26 17:34:30 +04:00
|
|
|
memset(bitmap->bitmap, 0,
|
1997-08-11 03:07:40 +04:00
|
|
|
(size_t) (((bitmap->real_end - bitmap->start) / 8) + 1));
|
1997-04-26 17:34:30 +04:00
|
|
|
}
|