File: fuseext2.c

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fuse-umfuse-ext2 0.3-1
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/*   This is part of um-ViewOS
 *   The user-mode implementation of OSVIEW -- A Process with a View
 *
 *   fuse/umfuse module for ext2 filesystems
 *   
 *   Copyright 2005,2007 Renzo Davoli University of Bologna - Italy
 *   Modified 2005 Andrea Seraghiti
 *   
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License along
 *   with this program; if not, write to the Free Software Foundation, Inc.,
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 *   $Id: fuseext2.c 370 2007-08-03 17:43:34Z rd235 $
 *
 */

//TODO:
//fsync!?
//extended attributes
//flush is correct?!
//writepage?!
//bug ls, sometimes there aren't all file and/or directory
//
#if 0
#ifdef linux
/* For pread()/pwrite() */
#define _XOPEN_SOURCE 500
#endif
#endif
#include <config.h>
#include <fuse.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <dirent.h>
#include <errno.h>
#include <sys/statfs.h>
#include <ext2fs/ext2fs.h>
#include <ext2fs/ext2_io.h>
#include <v2fuseutils.h>

#ifdef HAVE_SETXATTR
#include <sys/xattr.h>
#endif

#define S_IRWXUGO  (S_IRWXU|S_IRWXG|S_IRWXO)
#define S_IALLUGO  (S_ISUID|S_ISGID|S_ISVTX|S_IRWXUGO)

//#define DEBUG

struct ext2_file {
	errcode_t		magic;
	ext2_filsys 		fs;
	ext2_ino_t		ino;
	struct ext2_inode	inode;
	int 			flags;
	__u64			pos;
	blk_t			blockno;
	blk_t			physblock;
	char 			*buf;
};

static int ext2_getattr(const char *path, struct stat *stbuf)
{
	ext2_ino_t ino_n;
	struct ext2_inode  ino;
	int err;

	ext2_filsys e2fs;
	struct fuse_context *mycontext = fuse_get_context();
	e2fs = (ext2_filsys) mycontext->private_data;

	#ifdef DEBUG
	printf("\text2_getattr:%s %p\n",path,e2fs);
	#endif

	err = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, path, &ino_n);
	#ifdef DEBUG
	printf("\t\text2_namei:%sERR:%d\n",path, err);
	#endif
	if(err != 0 || ino_n == 0)//change < to !=
		return -ENOENT;
	
	err = ext2fs_read_inode (e2fs, ino_n, &ino);
	#ifdef DEBUG
	printf("\t\text2_read_inodeERR:%d\n",err);
	#endif
	if(err)
		return -ENOENT;

	/* XXX workaround
	 * should be unique and != existing devices */
	stbuf->st_dev = (dev_t) ((long)e2fs);
	stbuf->st_ino = ino_n;
	stbuf->st_mode = ino.i_mode;
	stbuf->st_nlink = ino.i_links_count;
	stbuf->st_uid = ino.i_uid;
	stbuf->st_gid = ino.i_gid;
	stbuf->st_rdev = 0; /* TODO special files mgmt */
	stbuf->st_size = ino.i_size;
	stbuf->st_blksize = e2fs->blocksize;
	stbuf->st_blocks = ino.i_blocks;
	stbuf->st_atime = ino.i_atime;
	stbuf->st_mtime = ino.i_mtime;
	stbuf->st_ctime = ino.i_ctime;
	return 0;
}

static int ext2_readlink(const char *path, char *buf, size_t size)
{
	ext2_ino_t ino_n;
	struct ext2_inode  ino;
	int err;

	ext2_filsys e2fs;
	struct fuse_context *mycontext=fuse_get_context();
	e2fs=(ext2_filsys) mycontext->private_data;

	#ifdef DEBUG
	printf("\text2_readlink:%s\n",path);
	#endif
	err = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, path, &ino_n);
	if(err < 0 || ino_n == 0)
		return -ENOENT;
	
	err = ext2fs_read_inode (e2fs, ino_n, &ino);
	if(err)
		return -ENOENT;
	
	if (!LINUX_S_ISLNK(ino.i_mode))
		return -EINVAL;
	size--;
	if (ino.i_size < size)
		size = ino.i_size;
	if ( ext2fs_inode_data_blocks(e2fs, &ino) ) {
		/* slow symlink */
		char *buffer;
		err = ext2fs_get_mem(e2fs->blocksize, &buffer);
		if (err)
			return err;
		err = io_channel_read_blk(e2fs->io, ino.i_block[0], 1, buffer);
		if (err) {
			ext2fs_free_mem(&buffer);
			return err;
		}
		memcpy(buf,buffer,size);
		ext2fs_free_mem(&buffer);
	} else
		/* fast symlink */
		memcpy(buf,(char *)&(ino.i_block[0]),size);
	buf[size]=0;

	return 0;
}

struct dir_iter_data {
	fuse_dirh_t h; 
	fuse_dirfil_t filler;
};

struct dir_filliter_data {
	void *buf; 
	fuse_fill_dir_t filler;
};

static int ext2_readdir_iter(
		ext2_ino_t    dir,
		int   entry,
		struct ext2_dir_entry *dirent, int   offset,
		int   blocksize, char  *buf, void *vpsid)
{
	int res;
	unsigned char type;
	int len;
	struct dir_filliter_data *psid=(struct dir_filliter_data *)vpsid;
	struct stat st;
	memset(&st, 0, sizeof(st));

	len=dirent->name_len & 0xff;
	dirent->name[len]=0; // bug wraparound

	switch  (dirent->name_len >> 9) {
		case EXT2_FT_UNKNOWN:	type=DT_UNKNOWN;break;
		case EXT2_FT_REG_FILE:	type=DT_REG;break;
		case EXT2_FT_DIR:	type=DT_DIR;break;
		case EXT2_FT_CHRDEV:	type=DT_CHR;break;
		case EXT2_FT_BLKDEV:	type=DT_BLK;break;
		case EXT2_FT_FIFO:	type=DT_FIFO;break;
		case EXT2_FT_SOCK:	type=DT_SOCK;break;
		case EXT2_FT_SYMLINK:	type=DT_LNK;break;
		default: 		type=DT_UNKNOWN;break;
	} 
	st.st_ino=dirent->inode;
	st.st_mode=type<<12;
	res = psid->filler(psid->buf, dirent->name, &st, 0);
	return 0;
}

static int ext2_dir_iter(
		ext2_ino_t    dir,
		int   entry,
		struct ext2_dir_entry *dirent, int   offset,
		int   blocksize, char  *buf, void *vpsid)
{
	int res;
	unsigned char type;
	int len;
	struct dir_iter_data *psid=(struct dir_iter_data *)vpsid;
	len=dirent->name_len & 0xff;
	dirent->name[len]=0; // bug wraparound

	switch  (dirent->name_len >> 9) {
		case EXT2_FT_UNKNOWN:	type=DT_UNKNOWN;break;
		case EXT2_FT_REG_FILE:	type=DT_REG;break;
		case EXT2_FT_DIR:	type=DT_DIR;break;
		case EXT2_FT_CHRDEV:	type=DT_CHR;break;
		case EXT2_FT_BLKDEV:	type=DT_BLK;break;
		case EXT2_FT_FIFO:	type=DT_FIFO;break;
		case EXT2_FT_SOCK:	type=DT_SOCK;break;
		case EXT2_FT_SYMLINK:	type=DT_LNK;break;
		default: 		type=DT_UNKNOWN;break;
	} 
	res = psid->filler(psid->h, dirent->name, type, dirent->inode);
	return 0;
}

static int ext2_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
		                           off_t offset, struct fuse_file_info *fi)
{
	ext2_ino_t ino_n;
	ext2_file_t e2file;
	int err;
	struct dir_filliter_data sid;
	sid.buf=buf;
	sid.filler=filler;

	ext2_filsys e2fs;
	struct fuse_context *mycontext=fuse_get_context();
	e2fs=(ext2_filsys) mycontext->private_data;

	err=ext2fs_namei_follow(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, path, &ino_n);
#ifdef DEBUG
	printf("\text2_getdir\n\text2_namei_followERR:%d\n",err);
#endif
	if(err || ino_n == 0)
		return -ENOENT;
	err=ext2fs_file_open(e2fs, ino_n, 0, &e2file);
	if(err)
		return -ENOENT;
	err=ext2fs_dir_iterate2(e2fs,ino_n, 0, NULL, ext2_readdir_iter, &sid);
	if(err)
		return -ENOENT;
	return 0;
}

static int ext2_getdir(const char *path, fuse_dirh_t h, fuse_dirfil_t filler)
{
    ext2_ino_t ino_n;
    ext2_file_t e2file;
    int err;
    struct dir_iter_data sid;
    sid.h=h;
    sid.filler=filler;

    ext2_filsys e2fs;
    struct fuse_context *mycontext=fuse_get_context();
    e2fs=(ext2_filsys) mycontext->private_data;

    err=ext2fs_namei_follow(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, path, &ino_n);
	#ifdef DEBUG
	printf("\text2_getdir\n\text2_namei_followERR:%d\n",err);
	#endif
    if(err || ino_n == 0)
        return -ENOENT;
    err=ext2fs_file_open(e2fs, ino_n, 0, &e2file);
    if(err)
        return -ENOENT;
    err=ext2fs_dir_iterate2(e2fs,ino_n, 0, NULL, ext2_dir_iter, &sid);
    if(err)
        return -ENOENT;
    return 0;
}

static int ext2_open(const char *path, struct fuse_file_info *fi)
{
	//TODO check permission,Open should check if the operation is permitted for the given flags.
	//open must only check if the operations is permittes except the flags:
	//O_CREAT, O_EXCL, O_TRUNC
	ext2_ino_t ino_n = 0;
	ext2_file_t e2file;
	int err;

	ext2_filsys e2fs;
	struct fuse_context *mycontext = fuse_get_context();
	e2fs = (ext2_filsys) mycontext->private_data;

	#ifdef DEBUG
	printf("\text2_open:%s\n",path);
	printf("\t\tflag:%d\n",fi->flags);
	#endif
	err = ext2fs_namei_follow(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, path, &ino_n);
	#ifdef DEBUG
	printf("\t\text2_namei_followERR:%d\n",err);
	#endif
	if(err || ino_n == 0)
		return -ENOENT;
	if ((fi->flags & O_ACCMODE) != 0)
		err = ext2fs_file_open(e2fs, ino_n, EXT2_FILE_WRITE, &e2file);
	else
		err = ext2fs_file_open(e2fs, ino_n, 0, &e2file);
	#ifdef DEBUG
	printf("\t\text2_file_openERR:%d\n",err);
	#endif
	if(err) {
		if (err == EXT2_ET_RO_FILSYS) 
			return EROFS;
		else
			return -ENOENT;
	}
	fi->fh = (long) e2file;
	return 0;
}

//create a file
static int ext2_mknod(const char *path, mode_t mode, dev_t dev)
{
	char	*cp;
	ext2_ino_t	parent, newfile;
	struct ext2_inode inode;
	int retval;
	char *name;
	char *path_parent;
	ext2_filsys e2fs;
	
	struct fuse_context *mycontext = fuse_get_context();
	e2fs = (ext2_filsys) mycontext->private_data;
	/*check if the file exist, but I do it in high level?!
	retval = ext2fs_namei(current_fs, EXT2_ROOT_INO, EXT2_ROOT_INO, path, &newfile);
	if (retval == 0) {
		fprintf(stderr, "The file '%s' already exists\n", path);
		return 1;
	}*/
	#ifdef DEBUG
	printf("\text2_mknod:%s\n",path);
	#endif
	retval = ext2fs_new_inode(e2fs, EXT2_ROOT_INO, 010755, 0, &newfile);
	if (retval) {
		#ifdef DEBUG
		fprintf(stderr, "Error to allocate inode:%d\n",retval);
		#endif
		return -ENOSPC;
	}
	#ifdef DEBUG
	printf("\t\tAllocated inode: %u\n", newfile);
	#endif
	
	if (strlen(path) == 0)
		path_parent = strdup("/");
	else
		path_parent = strdup(path);
	cp = strrchr(path_parent, '/');
	*cp = 0;
	cp++;//cp point to file name
	/*name = strdup(cp); // XXX ERR: this DUP has no FREE!!!*/
	name = cp;
	retval = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, path_parent, &parent);
	#ifdef DEBUG
	printf("\t\tName of file to create:%s\n",name);
	printf("\t\tName of parent:%s\n",path_parent);
	#endif
	retval = ext2fs_link(e2fs, parent, name, newfile, EXT2_FT_REG_FILE);

	while (retval == EXT2_ET_DIR_NO_SPACE) {
		#ifdef DEBUG
		fprintf(stderr, "Expand dir space\n");
		#endif
		retval = ext2fs_expand_dir(e2fs, parent);
		if (retval) {
			fprintf(stderr, "while expanding directory\n");
			free(path_parent);
			return -ENOSPC;
		}
		retval = ext2fs_link(e2fs, parent, name, newfile, EXT2_FT_REG_FILE);
	}
	free(path_parent);
	if (ext2fs_test_inode_bitmap(e2fs->inode_map, newfile))
		fprintf(stderr, "Warning: inode already set\n");
			
	ext2fs_inode_alloc_stats2(e2fs, newfile, +1, 0);
	memset(&inode, 0, sizeof(inode));
	inode.i_mode = mode;
	inode.i_atime = inode.i_ctime = inode.i_mtime = time(NULL);
	inode.i_links_count = 1;
	inode.i_size = 0; //initial size of file
	inode.i_uid=mycontext->uid;
	inode.i_gid=mycontext->gid;
	
	retval = ext2fs_write_new_inode(e2fs, newfile, &inode);
	if (retval) {
		fprintf(stderr, "Error while creating inode %u\n", newfile);
		return -EIO;
	}
	return 0;
}


static int ext2_read(const char *path, char *buf, size_t size, off_t offset,
                    struct fuse_file_info *fi)
{
	ext2_file_t e2file;
	int err;
	unsigned int newpos;
	unsigned int got;

	ext2_filsys e2fs;
	struct fuse_context *mycontext=fuse_get_context();
	e2fs=(ext2_filsys) mycontext->private_data;

	e2file=(ext2_file_t)((long)(fi->fh));
  #ifdef DEBUG
	printf("\text2_read-file read:%lu %p\n", fi->fh, e2file);
	#endif
	err = ext2fs_file_lseek(e2file, offset, SEEK_SET, &newpos);
	if(err)
		return -ENOENT;
	err = ext2fs_file_read(e2file, buf, size, &got);
	if(err)
		return -ENOENT;
	return got;
}

static int ext2_write(const char *path, const char *buf, size_t size, off_t offset,
                    struct fuse_file_info *fi)
{
	ext2_file_t e2file;
	ext2_off_t file_size;
	unsigned int newpos;
	unsigned int got = 0;
	int retval = 0;
	const char *buftmp = buf;

	ext2_filsys e2fs;
	struct fuse_context *mycontext=fuse_get_context();
	e2fs=(ext2_filsys) mycontext->private_data;
	#ifdef DEBUG
	printf("\text2_write\n");
	printf("\t\tfiletab:%d\n",fi->fh);
	#endif
	e2file = (ext2_file_t)((long)(fi->fh));
	#ifdef DEBUG
	printf("\t\tfileflag:%d\n",e2file->flags);
	#endif
	
	//adjust the file size
	file_size = ext2fs_file_get_size(e2file);
	#ifdef DEBUG
	printf("\t\tFileSize:%d\n",file_size);
	if ((offset+size) > file_size)
		printf("ext2fs_file_set_size %lld %d  %d\n", offset,size,(offset + size) );
	#endif
	if ((offset+size) > file_size)
		retval = ext2fs_file_set_size(e2file, (offset + size) );
	#ifdef DEBUG
	printf("\t\tSize:%dErr:%d\n",offset+size, retval);
	#endif

	ext2_off_t newoffset = (ext2_off_t) offset;
	retval = ext2fs_file_lseek(e2file, offset, SEEK_SET, &newpos);
	#ifdef DEBUG
	printf("\t\toffset%d-newpos:%d\n", offset, newpos);	
	printf("\t\text2_file_lseekErr:%d\n",retval);
	#endif
	if(retval < 0)
		return -ENOENT;
	got = newpos;
	#ifdef DEBUG
	printf("\t\tbuf%d-size:%d-got:%d\n",buf,size,got);
	printf("\t\tstampa:%s-blocksize%dEND\n",buf,e2fs->blocksize);
	#endif
	retval = 0;
	while ((size > 0) && (!retval)) {
		retval = ext2fs_file_write(e2file, buftmp, size, &got);
		size -= got;
		buftmp += got;
	#ifdef DEBUG
	printf("\t\tCycle:%d %d\n",size,retval);
	#endif
		}	
	#ifdef DEBUG
	printf("\t\tbuf%d-size:%d-got:%d\n",buf,size,got);
	printf("\t\text2_file_writeERR:%d\n",retval);
	#endif
	if(retval < 0)
		return -ENOENT;
	retval = ext2fs_file_flush(e2file);
	#ifdef DEBUG
	printf("\t\tFLUSHintoWrite:%d\n",retval);
	#endif
	return got;
}

/*
 * This routine is used whenever a command needs to turn a string into
 * an inode.
 */
/*ext2_ino_t string_to_inode(char *str)
{
	ext2_ino_t	ino;
	int		len = strlen(str);
	char		*end;
	int		retval;

    ext2_filsys e2fs;
    struct fuse_context *mycontext=fuse_get_context();
    e2fs=(ext2_filsys) mycontext->private_data;

    if ((len > 2) && (str[0] == '<') && (str[len-1] == '>')) {
		ino = strtoul(str+1, &end, 0);
		if (*end=='>')
			return ino;
	}

	retval = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, str, &ino);
	printf("stringtoinoderr:%d\n",retval);
	if (retval) {
		//com_err(str, retval, "");
		return 0;
	}
	return ino;
}*/

static int ext2_mkdir(const char *path, mode_t mode)
{
	int err;
	ext2_ino_t parent;// = NULL;
	char	*name;
	char	*cp;
	char *path_parent;
	ext2_ino_t ino_n;
	struct ext2_inode  ino;

	ext2_filsys e2fs;
	struct fuse_context *mycontext=fuse_get_context();
	e2fs = (ext2_filsys) mycontext->private_data;
	#ifdef DEBUG
	printf("\text2_mkdir:%s\n",path_parent);
	#endif
	
	if (strlen(path) == 0)
		path_parent=strdup("/");
	else
		path_parent= strdup(path);
 	cp = strrchr(path_parent, '/');//point to last /
	if (cp) { 
		name = strdup(cp+1);
		*cp = 0;
		err = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, path_parent, &parent);
		if (!parent) {
			#ifdef DEBUG
			printf("Parent Inode not found\n");
			#endif
			free(path_parent);
			free(name);
			return -ENOENT;
		}

	} else {//if there isn't parent
		#ifdef DEBUG
		printf("path without /\n");
		#endif
		free(path_parent);
		free(name);
		return -ENOENT;
	}
	#ifdef DEBUG
	printf("\t\tInode_Parent:%dpath%sname:%sinodebitmap%d\n",
			parent,path_parent,name,e2fs->inode_map);
	#endif
	err = ext2fs_mkdir(e2fs, parent, 0, name);
	#ifdef DEBUG
	printf("\t\tMkdirError:%d\n",err);
	#endif
	while (err == EXT2_ET_DIR_NO_SPACE) {
		#ifdef DEBUG
		fprintf(stderr, "Expand dir space\n");
		#endif
		err = ext2fs_expand_dir(e2fs, parent);
		if (err) {
			fprintf(stderr, "Error while expanding directory\n");
			free(path_parent);
			free(name);
			return -ENOENT;
		}
#ifdef DEBUG
		printf("\t\tInode_Parent:%dpath%sname:%sinodebitmap%d\n",
				parent,path_parent,name,e2fs->inode_map);
#endif
		err = ext2fs_mkdir(e2fs, parent, 0, name);
#ifdef DEBUG
		printf("\t\tMkdirError:%d\n",err);
#endif
		free(path_parent);
		free(name);
	}
	if (err) {
		fprintf(stderr, "Mkdir error:%d\n",err);
		return -ENOENT;
	}

	err = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, path, &ino_n);
	if(err == 0 && ino_n != 0) {
		if (ext2fs_read_inode (e2fs, ino_n, &ino) == 0) {
			ino.i_uid=mycontext->uid;
			ino.i_gid=mycontext->gid;
			err = ext2fs_write_inode (e2fs, ino_n, &ino);
		}
	}

	return 0;
}
struct rd_struct {
	ext2_ino_t	parent;
	int		empty;
};

static int rmdir_proc(ext2_ino_t dir EXT2FS_ATTR((unused)),
		      int	entry EXT2FS_ATTR((unused)),
		      struct ext2_dir_entry *dirent,
		      int	offset EXT2FS_ATTR((unused)),
		      int	blocksize EXT2FS_ATTR((unused)),
		      char	*buf EXT2FS_ATTR((unused)),
		      void	*private)
{
	struct rd_struct *rds = (struct rd_struct *) private;

	if (dirent->inode == 0)
		return 0;
	if (((dirent->name_len&0xFF) == 1) && (dirent->name[0] == '.'))
		return 0;
	if (((dirent->name_len&0xFF) == 2) && (dirent->name[0] == '.') &&
	    (dirent->name[1] == '.')) {
		rds->parent = dirent->inode;
		return 0;
	}
	rds->empty = 0;
	return 0;
}

static int unlink_file_by_name(ext2_filsys e2fs,const char *filename)
{
	int		retval;
	ext2_ino_t	dir;
	char *basename;
	char *localfn=strdup(filename);
	if (!localfn)
		return -ENOMEM;
	
	basename = strrchr(localfn, '/');
	if (basename) {
		*basename++ = '\0';
		retval = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, localfn, &dir);
		if (!dir) {
			free(localfn);
			return -ENOENT;
		}
	} else {
		dir = 2;//cwd;
		basename = localfn;
	}
	retval = ext2fs_unlink(e2fs, dir, basename, 0, 0);
	if (retval)
		printf("unlink_file_by_name:%d\n", retval);
	free(localfn);
	return retval;
}

static int release_blocks_proc(ext2_filsys fs, blk_t *blocknr,
			       int blockcnt EXT2FS_ATTR((unused)), 
			       void *private EXT2FS_ATTR((unused)))
{
	blk_t	block;

	block = *blocknr;
	ext2fs_block_alloc_stats(fs, block, -1);
	return 0;
}

static int kill_file_by_inode(ext2_filsys e2fs, ext2_ino_t inode,int nlink)
{
	struct ext2_inode inode_buf;
	int retval;
	
	retval = ext2fs_read_inode(e2fs, inode, &inode_buf);
	if(retval)
		return retval;
  inode_buf.i_links_count -= nlink;
	if (inode_buf.i_links_count <= 0) {
		inode_buf.i_links_count =0;
		inode_buf.i_dtime = time(NULL);
	}
	retval = ext2fs_write_inode(e2fs, inode, &inode_buf);
	if(retval)
		return retval;

	if (inode_buf.i_links_count == 0) {

		if (ext2fs_inode_has_valid_blocks(&inode_buf)) {
			ext2fs_block_iterate(e2fs, inode, 0, NULL,
					release_blocks_proc, NULL);
		}
		ext2fs_inode_alloc_stats2(e2fs, inode, -1,
				LINUX_S_ISDIR(inode_buf.i_mode));
	}
	return 0;
}

	static int ext2_rmdir(const char *path)
{

	int retval;
	ext2_ino_t inode_num;
	struct ext2_inode inode;
	struct rd_struct rds;

	ext2_filsys e2fs;
	struct fuse_context *mycontext=fuse_get_context();
	e2fs = (ext2_filsys) mycontext->private_data;

	retval = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, path, &inode_num);
	#ifdef DEBUG
	printf("\text2_rmdir\n\t\tpath:%s\n\t\tnameiErr:%d\n",path, retval);
	#endif
	if (retval) {
		fprintf(stderr, "while trying to resolve filename %s\n",path);
		return -ENOENT;
	}
	
	retval = ext2fs_read_inode(e2fs, inode_num, &inode);

	if (!LINUX_S_ISDIR(inode.i_mode)) {
		printf("ERROR,file is not a directory\n");
		return -ENOTDIR;
	}

	rds.parent = 0;
	rds.empty = 1;

	retval = ext2fs_dir_iterate2(e2fs, inode_num, 0, 0, rmdir_proc, &rds);
	if (retval) {
		printf("while iterating over directory\n");
		return -ENOENT;
	}
	#ifdef DEBUG
	printf("\t\text2fs_dir_iterateERR:%d\n",retval);
	#endif

	if (rds.empty == 0) {
		printf("directory not empty\n");
		return -ENOTEMPTY;
	}

	unlink_file_by_name(e2fs,path);
	kill_file_by_inode(e2fs,inode_num,2);
	if (rds.parent) {
		if ( retval = ext2fs_read_inode(e2fs, rds.parent, &inode) )
			return -EIO;
		if (inode.i_links_count > 1)
			inode.i_links_count--;
		if ( retval = ext2fs_write_inode(e2fs, rds.parent, &inode) )
			return -EIO;
	}
	return 0;	
}
/*
 * Given a mode, return the ext2 file type
 */
static int ext2_file_type(unsigned int mode)
{
	if (LINUX_S_ISREG(mode))
		return EXT2_FT_REG_FILE;

	if (LINUX_S_ISDIR(mode))
		return EXT2_FT_DIR;
	
	if (LINUX_S_ISCHR(mode))
		return EXT2_FT_CHRDEV;
	
	if (LINUX_S_ISBLK(mode))
		return EXT2_FT_BLKDEV;
	
	if (LINUX_S_ISLNK(mode))
		return EXT2_FT_SYMLINK;

	if (LINUX_S_ISFIFO(mode))
		return EXT2_FT_FIFO;
	
	if (LINUX_S_ISSOCK(mode))
		return EXT2_FT_SOCK;
	
	return 0;
}

static int ext2_symlink(const char *sourcename, const char *destname)
{
	ext2_ino_t	ino;
	struct ext2_inode inode;
	int		retval;
	ext2_ino_t	dir;
	const char	*dest;
	char  *cp, *basename;

	ext2_filsys e2fs;
	struct fuse_context *mycontext=fuse_get_context();
	e2fs = (ext2_filsys) mycontext->private_data;

	#ifdef DEBUG
	printf("\text2_symlink\n");
	#endif
	/* Figure out the destination.  First see if it exists and is
	 * a directory. */
	if (! (retval=ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, destname, &dir)))
		dest = basename;
	else {
		/* OK, it doesn't exist.  See if it is '<dir>/basename' or 'basename' */
		cp = strrchr(destname, '/');
		if (cp) {
			*cp = 0;
			retval = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, destname, &dir);
			if (retval != 0 || dir == 0)
				return -ENOENT;
			dest = cp+1;
		} else {
			dir = 2; // XXX err cwd;
			dest = destname;
		}
	}

	retval = ext2fs_new_inode(e2fs, EXT2_ROOT_INO, 010755, 0, &ino);
	if (retval) {
#ifdef DEBUG
		fprintf(stderr, "Error to allocate inode:%d\n",retval);
#endif
		return -ENOSPC;
	}
  
	retval = ext2fs_link(e2fs, dir, dest, ino, EXT2_FT_SYMLINK);
	while (retval == EXT2_ET_DIR_NO_SPACE) {
#ifdef DEBUG
		fprintf(stderr, "Expand dir space\n");
#endif
		retval = ext2fs_expand_dir(e2fs, dir);
		if (retval) {
			fprintf(stderr, "while expanding directory\n");
			return -ENOSPC;
		}
		retval = ext2fs_link(e2fs, dir, dest, ino, EXT2_FT_SYMLINK);
	}

	if (ext2fs_test_inode_bitmap(e2fs->inode_map, ino))
		fprintf(stderr, "Warning: inode already set\n");

	ext2fs_inode_alloc_stats2(e2fs, ino, +1, 0);
	memset(&inode, 0, sizeof(inode));
	inode.i_mode = S_IFLNK | 0777;
	inode.i_atime = inode.i_ctime = inode.i_mtime = time(NULL);
	inode.i_links_count = 1;
	inode.i_size = strlen(sourcename); //initial size of file
	inode.i_uid=mycontext->uid;
	inode.i_gid=mycontext->gid;

	if (strlen(sourcename) <= sizeof(inode.i_block)) {
		/* fast symlink */
		strncpy((char *)&(inode.i_block[0]),sourcename,sizeof(inode.i_blocks));
	} else {
		/* slow symlink */
		char *buffer;
		int err;
		err = ext2fs_get_mem(e2fs->blocksize, &buffer);
		if (!err) {
			blk_t blk;
			strncpy(buffer,sourcename,e2fs->blocksize);
			err = ext2fs_new_block(e2fs, 0, 0, &blk);
			if (!err) {
				inode.i_block[0]=blk;
				inode.i_blocks=e2fs->blocksize / 512;
				err = io_channel_write_blk(e2fs->io, blk, 1, buffer);
				ext2fs_block_alloc_stats(e2fs, blk, +1);
			}
			ext2fs_free_mem(&buffer);
		}
	}

	retval = ext2fs_write_new_inode(e2fs, ino, &inode);

	#ifdef DEBUG
	fprintf(stderr, "\t\text2fs_symlink error:%d\n",retval);
	#endif
	return 0;
}

static int ext2_link(const char *sourcename, const char *destname)
{
	ext2_ino_t	ino;
	struct ext2_inode inode;
	int		retval;
	ext2_ino_t	dir;
	const char *dest;
	const char *basename;
	char *cp;


	ext2_filsys e2fs;
	struct fuse_context *mycontext=fuse_get_context();
	e2fs = (ext2_filsys) mycontext->private_data;

	#ifdef DEBUG
	printf("\text2_link %s %s\n",sourcename,destname);
	#endif
	/*Get the source inode*/
	retval = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, sourcename, &ino);
	if (retval != 0 || ino == 0)
		return -ENOENT; //inode with this name does not exist
	basename = strrchr(sourcename, '/');
	if (basename)
		basename++;
	else
		basename = sourcename;
	/* Figure out the destination.  First see if it exists and is
	 * a directory. */
	if (! (retval=ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, destname, &dir)))
		dest = basename;
	else {
		/* OK, it doesn't exist.  See if it is '<dir>/basename' or 'basename' */
		cp = strrchr(destname, '/');
		if (cp) {
			*cp = 0;
			retval = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, destname, &dir);
			if (retval != 0 || dir == 0)
				return -ENOENT;
			dest = cp+1;
		} else {
			dir = 2;// XXX ERR cwd;
			dest = destname;
		}
	}
	retval = ext2fs_read_inode(e2fs, ino, &inode);
	if (retval) {
		fprintf(stderr, "while reading inode %u", ino);
		return -EIO;
	}
	retval = ext2fs_link(e2fs, dir, dest, ino, ext2_file_type(inode.i_mode));
	while (retval == EXT2_ET_DIR_NO_SPACE) {
		#ifdef DEBUG
		fprintf(stderr, "Expand dir space\n");
		#endif
		retval = ext2fs_expand_dir(e2fs, dir);
		if (retval) {
			fprintf(stderr, "while expanding directory\n");
			return -ENOSPC;
		}
		retval = ext2fs_link(e2fs, dir, dest, ino, ext2_file_type(inode.i_mode));
	}
	if (retval == EXT2_ET_NO_DIRECTORY)
		return -EEXIST;

	if (retval == 0) {
		inode.i_links_count ++;
		retval =  ext2fs_write_inode(e2fs, ino, &inode);
	}
	
	#ifdef DEBUG
	fprintf(stderr, "\t\text2fs_link error:%d\n",retval);
	#endif
	return 0;
}


static int ext2_unlink(const char *path)
{
	int retval;
	ext2_ino_t inode_num;
	struct ext2_inode inode;

	ext2_filsys e2fs;
	struct fuse_context *mycontext=fuse_get_context();
	e2fs = (ext2_filsys) mycontext->private_data;

	retval = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, path, &inode_num);
	if (retval) {
		printf("while trying to resolve filename %s\n",path);
		return -ENOENT;
	}
	
	retval = ext2fs_read_inode(e2fs, inode_num, &inode);
	if (retval) {
		printf("while reading inode %u", inode_num);
		return 1;
	}

	if (LINUX_S_ISDIR(inode.i_mode)) {
		fprintf(stderr, "file is a directory");
		return -EISDIR;
	}

	unlink_file_by_name(e2fs,path);
	//if (inode.i_links_count == 0)
	kill_file_by_inode(e2fs,inode_num,1);

	return 0;
}

static int ext2_chmod(const char *path, mode_t mode)
{
	ext2_ino_t ino_n;
	struct ext2_inode  ino;
	int err;

	ext2_filsys e2fs;
	struct fuse_context *mycontext = fuse_get_context();
	e2fs = (ext2_filsys) mycontext->private_data;

	#ifdef DEBUG
	printf("\text2_chmod:%s\n",path);
	#endif

	err = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, path, &ino_n);
	#ifdef DEBUG
	printf("\t\text2_namei:%sERR:%d\n",path, err);
	#endif
	if(err != 0 || ino_n == 0)//change < to !=
		return -ENOENT;
	
	err = ext2fs_read_inode (e2fs, ino_n, &ino);
	#ifdef DEBUG
	printf("\t\text2_read_inodeERR:%d\n",err);
	#endif
	if(err)
		return -ENOENT;
	
	ino.i_mode = (mode & S_IALLUGO) | (ino.i_mode & ~S_IALLUGO);
	err = ext2fs_write_inode(e2fs, ino_n, &ino);
	if (err) {
		fprintf(stderr, "Error while writing inode %u\n", ino_n);
		return err;
	}
	return 0;
}

static int ext2_chown(const char *path, uid_t owner, gid_t group)
{
	ext2_ino_t ino_n;
	struct ext2_inode  ino;
	int err;

	ext2_filsys e2fs;
	struct fuse_context *mycontext = fuse_get_context();
	e2fs = (ext2_filsys) mycontext->private_data;

	#ifdef DEBUG
	printf("\text2_chown:%s\n",path);
	#endif

	err = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, path, &ino_n);
	#ifdef DEBUG
	printf("\t\text2_namei:%sERR:%d\n",path, err);
	#endif
	if(err != 0 || ino_n == 0)//change < to !=
		return -ENOENT;
	
	err = ext2fs_read_inode (e2fs, ino_n, &ino);
	#ifdef DEBUG
	printf("\t\text2_read_inodeERR:%d\n",err);
	#endif
	if(err)
		return -ENOENT;
	
	ino.i_uid = owner;
	ino.i_gid = group;
	err = ext2fs_write_inode(e2fs, ino_n, &ino);
	if (err) {
		fprintf(stderr, "Error while writing inode %u\n", ino_n);
		return err;
	}
	return 0;
}

static int ext2_truncate(const char *path, off_t length)
{
	ext2_ino_t ino_n;
	struct ext2_inode  ino;
	int err;

	ext2_filsys e2fs;
	struct fuse_context *mycontext = fuse_get_context();
	e2fs = (ext2_filsys) mycontext->private_data;

	#ifdef DEBUG
	printf("\text2_truncate:%s\n",path);
	#endif
	err = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, path, &ino_n);
	#ifdef DEBUG
	printf("\t\text2_namei:%sERR:%d\n",path, err);
	#endif
	if(err != 0 || ino_n == 0)//change < to !=
		return -ENOENT;
	
	err = ext2fs_read_inode (e2fs, ino_n, &ino);
	#ifdef DEBUG
	printf("\t\text2_read_inodeERR:%d\n",err);
	#endif
	if(err)
		return -ENOENT;
	
	ino.i_size = length; //size of file
	//TODO free the old space(I must change bitmap?)
	err = ext2fs_write_inode(e2fs, ino_n, &ino);
	if (err) {
		fprintf(stderr, "Error while writing inode %u\n", ino_n);
		return err;
	}
	return 0;
}

static int ext2_rename(const char *oldpath, const char *newpath)
{
	ext2_ino_t ino_old;
	ext2_ino_t ino_new=0;
	struct ext2_inode inode;
	int err;
	int retval;
	ext2_ino_t dir;
	char *cp = strrchr(newpath, '/');
	const char *dest;

	ext2_filsys e2fs;
	struct fuse_context *mycontext = fuse_get_context();
	e2fs = (ext2_filsys) mycontext->private_data;

	/*Get the source inode*/
	retval = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, oldpath, &ino_old);
	if (retval != 0 || ino_old == 0)
		return -ENOENT; //inode with this name does not exist
	retval = ext2fs_read_inode(e2fs, ino_old, &inode);
	if (retval) {
		printf("while reading inode %u", ino_old);
		return 1;
	}

	retval = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, newpath, &ino_new);

	if (cp) {
		*cp = 0;
		retval = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, newpath, &dir);
		if (retval != 0 || dir == 0)
			return -ENOENT;
		dest = cp+1;
	} else {
		dir = 2;// XXX ERR cwd;
		dest = newpath;
	}

	/*Get the destination inode*/
	if (ino_new != 0) {
		if (ino_old == ino_new) /*are the same: DO NOTHING*/
			return 0;
		else {
			struct ext2_inode newinode;
			/*newpath exists*/
#ifdef DEBUG
			fprintf(stderr, "rename existing new\n");
#endif
			retval = ext2fs_read_inode(e2fs, ino_new, &newinode);
			if (retval) {
				printf("while reading inode %u", ino_old);
				return 1;
			}

			if (LINUX_S_ISDIR(newinode.i_mode)) {
				/* oldpath can specify a directory.  In this case, newpath must either not
				 *        exist, or it must specify an empty directory. */
				if (!LINUX_S_ISDIR(inode.i_mode)) {
					return -EISDIR;
				} else {
					struct rd_struct rds;
					rds.parent = 0;
					rds.empty = 1;
					retval = ext2fs_dir_iterate2(e2fs, ino_new, 0, 0, rmdir_proc, &rds);
					if (retval) {
						printf("while iterating over directory\n");
						return -ENOENT;
					}
					if (rds.empty == 0) {
						printf("directory not empty\n");
						return -ENOTEMPTY;
					}
				}
			}

			retval = ext2fs_unlink(e2fs, dir, dest, 0, 0);
			if (retval)
				printf("unlink_file_by_name:%d\n", retval);
		}
	} 
	/* link the old to the new path */
	retval = ext2fs_link(e2fs, dir, dest, ino_old, ext2_file_type(inode.i_mode));
	while (retval == EXT2_ET_DIR_NO_SPACE) {
#ifdef DEBUG
		fprintf(stderr, "Expand dir space\n");
#endif
		retval = ext2fs_expand_dir(e2fs, dir);
		if (retval == 0) 
			retval = ext2fs_link(e2fs, dir, dest, ino_old, ext2_file_type(inode.i_mode));
	}

	if (retval == 0) {
		/* unlink the old path */
		unlink_file_by_name(e2fs,oldpath);
		if (ino_new != 0) 
			kill_file_by_inode(e2fs,ino_new,1);
	} else {
		retval=ext2fs_link(e2fs, dir, dest, ino_new, ext2_file_type(inode.i_mode));
	}
	return 0;
}

static int ext2_utime(const char *path, struct utimbuf *buf)
{
	ext2_ino_t ino_n;
	struct ext2_inode  ino;
	int err;

	ext2_filsys e2fs;
	struct fuse_context *mycontext = fuse_get_context();
	e2fs = (ext2_filsys) mycontext->private_data;

	#ifdef DEBUG
	printf("\text2_utime:%s\n",path);
	#endif

	err = ext2fs_namei(e2fs, EXT2_ROOT_INO, EXT2_ROOT_INO, path, &ino_n);
	#ifdef DEBUG
	printf("\t\text2_namei:%sERR:%d\n",path, err);
	#endif
	if(err != 0 || ino_n == 0)//change < to !=
		return -ENOENT;
	
	err = ext2fs_read_inode (e2fs, ino_n, &ino);
	#ifdef DEBUG
	printf("\t\text2_read_inodeERR:%d\n",err);
	#endif
	if(err)
		return -ENOENT;
	
	ino.i_atime = buf->actime;
	ino.i_mtime = buf->modtime;
	err = ext2fs_write_inode(e2fs, ino_n, &ino);
	if (err) {
		fprintf(stderr, "Error while writing inode %u\n", ino_n);
		return err;
	}
	return 0;
}

#if ( FUSE_MINOR_VERSION >= 5 )
static int ext2_statfs(const char *path, struct statvfs *buf)
{
	int err;

	ext2_filsys e2fs;
	struct fuse_context *mycontext = fuse_get_context();
	e2fs = (ext2_filsys) mycontext->private_data;

	buf->f_bsize = e2fs->blocksize;
	/* it does not take into account real overhead */
	buf->f_blocks = e2fs->super->s_blocks_count;
	buf->f_bfree = e2fs->super->s_free_blocks_count;
	if (e2fs->super->s_free_blocks_count < e2fs->super->s_r_blocks_count)
		buf->f_bavail = 0;
	else
		buf->f_bavail = e2fs->super->s_free_blocks_count - e2fs->super->s_r_blocks_count;
	buf->f_files=e2fs->super->s_inodes_count;
	buf->f_ffree=e2fs->super->s_free_inodes_count;
	buf->f_namemax=EXT2_NAME_LEN;

	return 0;
}
#endif

static int ext2_flush(const char *path, struct fuse_file_info *fi)
{
#ifdef DEBUG	
	printf("\text2_flush,file;%lu\n",fi->fh);
#endif

	ext2_file_t e2file;
	ext2_filsys e2fs;
	struct fuse_context *mycontext=fuse_get_context();
	e2fs = (ext2_filsys) mycontext->private_data;
	#ifdef DEBUG
	printf("\text2_flush\n");
	#endif

//	if ((e2file->flags & EXT2_FILE_BUF_VALID) || (e2file->flags & EXT2_FILE_BUF_DIRTY))
//		printf("flush needed\n");
	#ifdef DEBUG
	printf("\t\tfiletab:%d\n",fi->fh);
	#endif
	e2file = (ext2_file_t)((long)(fi->fh));
	#ifdef DEBUG
	printf("\t\tfileflag:%d\n",e2file->flags);
	#endif
	int retval = ext2fs_file_flush(e2file);
	#ifdef DEBUG
	printf("\t\tFLUSH:%d\n",retval);
	#endif
	return 0;
}

static int ext2_release(const char *path, struct fuse_file_info *fi)
{
	ext2_file_t e2file;
	int err;

	e2file = (ext2_file_t)((long)(fi->fh));
	#ifdef DEBUG
	fprintf(stderr, "\text2_Release,file:%lu\n",fi->fh);
	#endif

	#ifdef DEBUG
	if ((e2file->flags & EXT2_FILE_BUF_VALID) || (e2file->flags & EXT2_FILE_BUF_DIRTY))
		printf("La roba gli aRRIVA!!!!!!!!!!!!!!!!!\n");
	#endif
	err = ext2fs_file_close(e2file);
	#ifdef DEBUG
	printf("\t\tCLOSE ERROR:%d\n",err);
	#endif
	return 0;
}

/* temporary solution waiting for FUSE 2.6 */
#if ( FUSE_MINOR_VERSION <= 5 )
static void *init_data;

void *ext2_init(void)
{
	return init_data;
}
#else
void *ext2_init(struct fuse_conn_info *conn)
{ 
	  struct fuse_context *mycontext;
		mycontext=fuse_get_context();
#ifdef DEBUG
		printf("INIT %p\n",mycontext->private_data);
#endif
		return mycontext->private_data;
} 
#endif


static struct fuse_operations ext2_oper = {
	.init	= ext2_init,
	.getattr	= ext2_getattr,
	.readlink	= ext2_readlink,
	.readdir	= ext2_readdir,
	.mknod		= ext2_mknod,
	.mkdir		= ext2_mkdir,
	.rmdir		= ext2_rmdir,
	.open		= ext2_open,
	.read		= ext2_read,
	.write		= ext2_write, 
	.release	= ext2_release,
	.unlink		= ext2_unlink,
	.link		= ext2_link,
	.symlink	= ext2_symlink,
	.rename		= ext2_rename,
	.truncate	= ext2_truncate,
	.flush		 = ext2_flush,
	.chmod		= ext2_chmod,
	.chown		= ext2_chown,
	.utime		= ext2_utime,
#if ( FUSE_MINOR_VERSION >= 5 )
	.statfs		= ext2_statfs,
#endif
#if 0
#ifdef HAVE_SETXATTR
    .setxattr	= ext2_setxattr,
    .getxattr	= ext2_getxattr,
    .listxattr	= ext2_listxattr,
    .removexattr= ext2_removexattr,
#endif
#endif
};


static int close_filesystem(ext2_filsys current_fs)
{
	int	retval;
	
	if (current_fs->flags & EXT2_FLAG_IB_DIRTY) {
		retval = ext2fs_write_inode_bitmap(current_fs);
		if (retval)
			fprintf(stderr, "ext2fs_write_inode_bitmap_error:%d", retval);
	}
	if (current_fs->flags & EXT2_FLAG_BB_DIRTY) {
		retval = ext2fs_write_block_bitmap(current_fs);
		if (retval)
			fprintf(stderr, "ext2fs_write_block_bitmap_error:%d", retval);
	}
	retval = ext2fs_close(current_fs);
	if (retval)
		fprintf(stderr, "ext2fs_close_error:%d", retval);
	current_fs = NULL;
	return 0;
}


struct fuse *fuse;

int main(int argc, char *argv[])
{
	int err, i, retval;
	io_channel data_io = 0;
	struct fuse_context *mycontext;
	ext2_filsys e2fs;
	int nargc;
	char **nargv;
	char *source, *mountpoint;
	int rorwplus;
#if ( FUSE_MINOR_VERSION <= 5 )
	int fuse_fd;
#else
	struct fuse_chan *fuse_fd;
#endif
	//argv[0]=nome file system
#ifdef DEBUG
	printf("argc:%d\n",argc);
	for(i=0;i<argc;i++)
		printf("Argv[%d]:%s\n",i,argv[i]);
#endif
	if (argc < 3) {
		v2f_usage(argv[0],&ext2_oper);
		return -ENODEV;
	}
	v2f_rearrangeargv(argc,argv);
	source = argv[1];// image.ext2
	mountpoint = argv[2];// mountpoint
	rorwplus=v2f_checkrorwplus(argc-2,argv+2);
	if (v2f_printwarning(rorwplus))
		return -EINVAL;
	
/*	initialize_ext2_error_table();
	fprintf (stderr, "debugfs %s (data)\n", E2FSPROGS_VERSION, E2FSPROGS_DATE);
*/
	err = ext2fs_open (source, (rorwplus & FLRWPLUS)?EXT2_FLAG_RW:0
			, 0, 0, unix_io_manager, &e2fs);
//#ifdef DEBUG
	if(err) {
		printf("Open_ext2 Error:%d\n",err);
		return -ENODEV; //TODO:change umfuse if a filesystem report an error
	}
//#endif

	err = ext2fs_read_inode_bitmap(e2fs);
#ifdef DEBUG
	printf("read_inode_bitmaPerr%d\n",err);
#endif

	err = ext2fs_read_block_bitmap(e2fs);
#ifdef DEBUG
	printf("read_block_bitmaPerr%d\n",err);
	//printf("blocksize:%d\n",e2fs->blocksize);

	if(e2fs->flags & EXT2_FLAG_RW)
		printf("FileSystem Read&Write\n");
	else
		printf("FileSystem ReadOnly\n");
#endif

	if (data_io) {
#ifdef DEBUG
		printf("data_io Setting...\n");
#endif
		retval = ext2fs_set_data_io(e2fs, data_io);
		if (retval) {
			fprintf(stderr,"ERROR:while setting data source:%d\n",retval);
		}
	}

	argv[1]=argv[0];
#if ( FUSE_MINOR_VERSION <= 5 )
	init_data=e2fs;
	fuse_main(--argc,++argv,&ext2_oper);
#else
	fuse_main(--argc,++argv,&ext2_oper,e2fs);
#endif

	ext2fs_flush(e2fs);
	close_filesystem(e2fs);
	ext2fs_free(e2fs);
	return 0;
}