1997-04-26 17:21:57 +04:00
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/*
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* newdir.c --- create a new directory block
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2008-08-28 07:07:54 +04:00
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*
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1997-04-29 20:17:09 +04:00
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* Copyright (C) 1994, 1995 Theodore Ts'o.
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*
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* %Begin-Header%
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2010-05-18 05:31:56 +04:00
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* This file may be redistributed under the terms of the GNU Library
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* General Public License, version 2.
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1997-04-29 20:17:09 +04:00
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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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2011-09-19 01:34:37 +04:00
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#include "config.h"
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1997-04-26 17:21:57 +04:00
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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 17:34:30 +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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1999-10-23 04:58:54 +04:00
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#ifndef EXT2_FT_DIR
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#define EXT2_FT_DIR 2
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#endif
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1997-04-26 17:21:57 +04:00
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/*
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* Create new directory block
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*/
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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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errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,
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ext2_ino_t parent_ino, char **block)
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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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struct ext2_dir_entry *dir = NULL;
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errcode_t retval;
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char *buf;
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int rec_len;
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1999-10-23 04:58:54 +04:00
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int filetype = 0;
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2012-08-03 01:27:43 +04:00
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struct ext2_dir_entry_tail *t;
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int csum_size = 0;
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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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2003-08-01 17:41:07 +04:00
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retval = ext2fs_get_mem(fs->blocksize, &buf);
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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 17:21:57 +04:00
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memset(buf, 0, fs->blocksize);
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dir = (struct ext2_dir_entry *) buf;
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2009-06-22 05:07:38 +04:00
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2012-08-03 01:27:43 +04:00
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if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
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EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
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csum_size = sizeof(struct ext2_dir_entry_tail);
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retval = ext2fs_set_rec_len(fs, fs->blocksize - csum_size, dir);
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2013-12-11 05:21:34 +04:00
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if (retval) {
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ext2fs_free_mem(&buf);
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2009-06-22 05:07:38 +04:00
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return retval;
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2013-12-11 05:21:34 +04:00
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}
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1997-04-26 17:21:57 +04:00
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if (dir_ino) {
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2001-01-01 19:17:12 +03:00
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if (fs->super->s_feature_incompat &
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EXT2_FEATURE_INCOMPAT_FILETYPE)
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2013-06-08 19:26:14 +04:00
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filetype = EXT2_FT_DIR;
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1997-04-26 17:21:57 +04:00
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/*
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* Set up entry for '.'
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*/
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dir->inode = dir_ino;
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2013-06-08 19:26:14 +04:00
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ext2fs_dirent_set_name_len(dir, 1);
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ext2fs_dirent_set_file_type(dir, filetype);
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1997-04-26 17:21:57 +04:00
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dir->name[0] = '.';
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2012-08-03 01:27:43 +04:00
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rec_len = (fs->blocksize - csum_size) - EXT2_DIR_REC_LEN(1);
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1999-10-23 04:58:54 +04:00
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dir->rec_len = EXT2_DIR_REC_LEN(1);
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1997-04-26 17:21:57 +04:00
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/*
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* Set up entry for '..'
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*/
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dir = (struct ext2_dir_entry *) (buf + dir->rec_len);
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2009-06-22 05:07:38 +04:00
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retval = ext2fs_set_rec_len(fs, rec_len, dir);
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2013-12-11 05:21:34 +04:00
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if (retval) {
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ext2fs_free_mem(&buf);
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2009-06-22 05:07:38 +04:00
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return retval;
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2013-12-11 05:21:34 +04:00
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}
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1997-04-26 17:21:57 +04:00
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dir->inode = parent_ino;
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2013-06-08 19:26:14 +04:00
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ext2fs_dirent_set_name_len(dir, 2);
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ext2fs_dirent_set_file_type(dir, filetype);
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1997-04-26 17:21:57 +04:00
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dir->name[0] = '.';
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dir->name[1] = '.';
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2008-08-28 07:07:54 +04:00
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1997-04-26 17:21:57 +04:00
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}
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2012-08-03 01:27:43 +04:00
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if (csum_size) {
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t = EXT2_DIRENT_TAIL(buf, fs->blocksize);
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ext2fs_initialize_dirent_tail(fs, t);
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}
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1997-04-26 17:21:57 +04:00
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*block = buf;
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return 0;
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}
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