1997-04-29 20:15:03 +04:00
|
|
|
/*
|
|
|
|
* alloc_tables.c --- Allocate tables for a newly initialized
|
|
|
|
* filesystem. Used by mke2fs when initializing a filesystem
|
|
|
|
*
|
|
|
|
* Copyright (C) 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>
|
1997-08-11 03:07:40 +04:00
|
|
|
#if HAVE_UNISTD_H
|
1997-04-29 20:15:03 +04:00
|
|
|
#include <unistd.h>
|
1997-08-11 03:07:40 +04:00
|
|
|
#endif
|
1997-04-29 20:15:03 +04:00
|
|
|
#include <fcntl.h>
|
|
|
|
#include <time.h>
|
1997-10-20 03:00:21 +04:00
|
|
|
#if HAVE_SYS_STAT_H
|
1997-04-29 20:15:03 +04:00
|
|
|
#include <sys/stat.h>
|
1997-10-20 03:00:21 +04:00
|
|
|
#endif
|
|
|
|
#if HAVE_SYS_TYPES_H
|
1997-04-29 20:15:03 +04:00
|
|
|
#include <sys/types.h>
|
1997-10-20 03:00:21 +04:00
|
|
|
#endif
|
1997-04-29 20:15:03 +04:00
|
|
|
|
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
|
|
|
#include "ext2_fs.h"
|
1997-04-29 20:15:03 +04:00
|
|
|
#include "ext2fs.h"
|
|
|
|
|
1998-09-03 05:22:57 +04:00
|
|
|
errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group,
|
1997-06-09 18:51:29 +04:00
|
|
|
ext2fs_block_bitmap bmap)
|
1997-04-29 20:15:03 +04:00
|
|
|
{
|
|
|
|
errcode_t retval;
|
1997-04-29 21:48:10 +04:00
|
|
|
blk_t group_blk, start_blk, last_blk, new_blk, blk;
|
1997-06-09 18:51:29 +04:00
|
|
|
int j;
|
1997-04-29 20:15:03 +04:00
|
|
|
|
1997-06-09 18:51:29 +04:00
|
|
|
group_blk = fs->super->s_first_data_block +
|
|
|
|
(group * fs->super->s_blocks_per_group);
|
|
|
|
|
|
|
|
last_blk = group_blk + fs->super->s_blocks_per_group;
|
|
|
|
if (last_blk >= fs->super->s_blocks_count)
|
|
|
|
last_blk = fs->super->s_blocks_count - 1;
|
1997-04-29 21:57:00 +04:00
|
|
|
|
1997-06-09 18:51:29 +04:00
|
|
|
start_blk = group_blk + 3 + fs->desc_blocks;
|
|
|
|
if (start_blk > last_blk)
|
|
|
|
start_blk = group_blk;
|
|
|
|
|
|
|
|
if (!bmap)
|
|
|
|
bmap = fs->block_map;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Allocate the inode table
|
|
|
|
*/
|
|
|
|
if (!fs->group_desc[group].bg_inode_table) {
|
1997-04-29 21:48:10 +04:00
|
|
|
retval = ext2fs_get_free_blocks(fs, start_blk, last_blk,
|
|
|
|
fs->inode_blocks_per_group,
|
1997-06-09 18:51:29 +04:00
|
|
|
bmap, &new_blk);
|
1997-04-29 20:15:03 +04:00
|
|
|
if (retval)
|
|
|
|
return retval;
|
1997-04-29 21:48:10 +04:00
|
|
|
for (j=0, blk = new_blk;
|
|
|
|
j < fs->inode_blocks_per_group;
|
|
|
|
j++, blk++)
|
1997-06-09 18:51:29 +04:00
|
|
|
ext2fs_mark_block_bitmap(bmap, blk);
|
|
|
|
fs->group_desc[group].bg_inode_table = new_blk;
|
|
|
|
}
|
1997-04-29 20:15:03 +04:00
|
|
|
|
1997-06-09 18:51:29 +04:00
|
|
|
/*
|
|
|
|
* Allocate the block and inode bitmaps, if necessary
|
|
|
|
*/
|
|
|
|
if (fs->stride) {
|
|
|
|
start_blk += fs->inode_blocks_per_group;
|
|
|
|
start_blk += ((fs->stride * group) %
|
|
|
|
(last_blk - start_blk));
|
|
|
|
if (start_blk > last_blk)
|
|
|
|
/* should never happen */
|
1997-04-30 01:26:48 +04:00
|
|
|
start_blk = group_blk;
|
1997-06-09 18:51:29 +04:00
|
|
|
} else
|
|
|
|
start_blk = group_blk;
|
|
|
|
|
|
|
|
if (!fs->group_desc[group].bg_block_bitmap) {
|
1997-04-29 21:48:10 +04:00
|
|
|
retval = ext2fs_get_free_blocks(fs, start_blk, last_blk,
|
1997-06-09 18:51:29 +04:00
|
|
|
1, bmap, &new_blk);
|
1998-06-11 00:39:43 +04:00
|
|
|
if (retval == EXT2_ET_BLOCK_ALLOC_FAIL)
|
|
|
|
retval = ext2fs_get_free_blocks(fs, group_blk,
|
|
|
|
last_blk, 1, bmap, &new_blk);
|
1997-04-29 20:15:03 +04:00
|
|
|
if (retval)
|
|
|
|
return retval;
|
1997-06-09 18:51:29 +04:00
|
|
|
ext2fs_mark_block_bitmap(bmap, new_blk);
|
|
|
|
fs->group_desc[group].bg_block_bitmap = new_blk;
|
|
|
|
}
|
1997-04-29 20:15:03 +04:00
|
|
|
|
1997-06-09 18:51:29 +04:00
|
|
|
if (!fs->group_desc[group].bg_inode_bitmap) {
|
1997-04-29 21:48:10 +04:00
|
|
|
retval = ext2fs_get_free_blocks(fs, start_blk, last_blk,
|
1997-06-09 18:51:29 +04:00
|
|
|
1, bmap, &new_blk);
|
1998-06-11 00:39:43 +04:00
|
|
|
if (retval == EXT2_ET_BLOCK_ALLOC_FAIL)
|
|
|
|
retval = ext2fs_get_free_blocks(fs, group_blk,
|
|
|
|
last_blk, 1, bmap, &new_blk);
|
1997-04-29 20:15:03 +04:00
|
|
|
if (retval)
|
|
|
|
return retval;
|
1997-06-09 18:51:29 +04:00
|
|
|
ext2fs_mark_block_bitmap(bmap, new_blk);
|
|
|
|
fs->group_desc[group].bg_inode_bitmap = new_blk;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
errcode_t ext2fs_allocate_tables(ext2_filsys fs)
|
|
|
|
{
|
|
|
|
errcode_t retval;
|
1998-09-03 05:22:57 +04:00
|
|
|
dgrp_t i;
|
1997-04-29 20:15:03 +04:00
|
|
|
|
1997-06-09 18:51:29 +04:00
|
|
|
for (i = 0; i < fs->group_desc_count; i++) {
|
|
|
|
retval = ext2fs_allocate_group_table(fs, i, fs->block_map);
|
|
|
|
if (retval)
|
|
|
|
return retval;
|
1997-04-29 20:15:03 +04:00
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|