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/*
* mkdir.c --- make a directory in the filesystem
*
* Copyright (C) 1994, 1995 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"
#ifndef EXT2_FT_DIR
#define EXT2_FT_DIR 2
#endif
errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
const char *name)
{
ext2_extent_handle_t handle;
errcode_t retval;
struct ext2_inode parent_inode, inode;
ext2_ino_t ino = inum;
ext2_ino_t scratch_ino;
blk64_t blk;
char *block = 0;
int inline_data = 0;
int drop_refcount = 0;
EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
/*
* Create a new dir with inline data iff this feature is enabled
* and ino >= EXT2_FIRST_INO.
*/
if ((!ino || ino >= EXT2_FIRST_INO(fs->super)) &&
ext2fs_has_feature_inline_data(fs->super))
inline_data = 1;
/*
* Allocate an inode, if necessary
*/
if (!ino) {
retval = ext2fs_new_inode(fs, parent, LINUX_S_IFDIR | 0755,
0, &ino);
if (retval)
goto cleanup;
}
/*
* Allocate a data block for the directory
*/
memset(&inode, 0, sizeof(struct ext2_inode));
if (!inline_data) {
retval = ext2fs_new_block2(fs, ext2fs_find_inode_goal(fs, ino,
&inode,
0),
NULL, &blk);
if (retval)
goto cleanup;
}
/*
* Create a scratch template for the directory
*/
if (inline_data)
retval = ext2fs_new_dir_inline_data(fs, ino, parent,
inode.i_block);
else
retval = ext2fs_new_dir_block(fs, ino, parent, &block);
if (retval)
goto cleanup;
/*
* Get the parent's inode, if necessary
*/
if (parent != ino) {
retval = ext2fs_read_inode(fs, parent, &parent_inode);
if (retval)
goto cleanup;
} else
memset(&parent_inode, 0, sizeof(parent_inode));
/*
* Create the inode structure....
*/
inode.i_mode = LINUX_S_IFDIR | (0777 & ~fs->umask);
inode.i_uid = inode.i_gid = 0;
if (inline_data) {
inode.i_flags |= EXT4_INLINE_DATA_FL;
inode.i_size = EXT4_MIN_INLINE_DATA_SIZE;
} else {
if (ext2fs_has_feature_extents(fs->super))
inode.i_flags |= EXT4_EXTENTS_FL;
else
inode.i_block[0] = blk;
inode.i_size = fs->blocksize;
ext2fs_iblk_set(fs, &inode, 1);
}
inode.i_links_count = 2;
/*
* Write out the inode and inode data block. The inode generation
* number is assigned by write_new_inode, which means that the call
* to write_dir_block must come after that.
*/
retval = ext2fs_write_new_inode(fs, ino, &inode);
if (retval)
goto cleanup;
if (inline_data) {
/* init "system.data" for new dir */
retval = ext2fs_inline_data_init(fs, ino);
} else {
retval = ext2fs_write_dir_block4(fs, blk, block, 0, ino);
if (retval)
goto cleanup;
if (ext2fs_has_feature_extents(fs->super)) {
retval = ext2fs_extent_open2(fs, ino, &inode, &handle);
if (retval)
goto cleanup;
retval = ext2fs_extent_set_bmap(handle, 0, blk, 0);
ext2fs_extent_free(handle);
if (retval)
goto cleanup;
}
}
/*
* Update accounting....
*/
if (!inline_data)
ext2fs_block_alloc_stats2(fs, blk, +1);
ext2fs_inode_alloc_stats2(fs, ino, +1, 1);
drop_refcount = 1;
/*
* Link the directory into the filesystem hierarchy
*/
if (name) {
retval = ext2fs_lookup(fs, parent, name, strlen(name), 0,
&scratch_ino);
if (!retval) {
retval = EXT2_ET_DIR_EXISTS;
name = 0;
goto cleanup;
}
if (retval != EXT2_ET_FILE_NOT_FOUND)
goto cleanup;
retval = ext2fs_link(fs, parent, name, ino, EXT2_FT_DIR);
if (retval)
goto cleanup;
}
/*
* Update parent inode's counts
*/
if (parent != ino) {
/* reload parent inode due to inline data */
retval = ext2fs_read_inode(fs, parent, &parent_inode);
if (retval)
goto cleanup;
parent_inode.i_links_count++;
retval = ext2fs_write_inode(fs, parent, &parent_inode);
if (retval)
goto cleanup;
}
drop_refcount = 0;
cleanup:
if (block)
ext2fs_free_mem(&block);
if (drop_refcount) {
if (!inline_data)
ext2fs_block_alloc_stats2(fs, blk, -1);
ext2fs_inode_alloc_stats2(fs, ino, -1, 1);
}
return retval;
}
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