static inline void fuse_update_ctime(struct inode *inode)
{
	if (!IS_NOCMTIME(inode)) {
		inode->i_ctime = current_fs_time(inode->i_sb);
		mark_inode_dirty_sync(inode);
	}
}

/*
 * Transactional inode timestamp update. Requires the inode to be locked and
 * joined to the transaction supplied. Relies on the transaction subsystem to
 * track dirty state and update/writeback the inode accordingly.
 */
void
xfs_trans_ichgtime(
	struct xfs_trans	*tp,
	struct xfs_inode	*ip,
	int			flags)
{
	struct inode		*inode = VFS_I(ip);
	timespec_t		tv;

	ASSERT(tp);
	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));

	tv = current_fs_time(inode->i_sb);

	if ((flags & XFS_ICHGTIME_MOD) &&
	    !timespec_equal(&inode->i_mtime, &tv)) {
		inode->i_mtime = tv;
		ip->i_d.di_mtime.t_sec = tv.tv_sec;
		ip->i_d.di_mtime.t_nsec = tv.tv_nsec;
	}
	if ((flags & XFS_ICHGTIME_CHG) &&
	    !timespec_equal(&inode->i_ctime, &tv)) {
		inode->i_ctime = tv;
		ip->i_d.di_ctime.t_sec = tv.tv_sec;
		ip->i_d.di_ctime.t_nsec = tv.tv_nsec;
	}
}

/*
 * @value: "" makes the attribute to empty, NULL removes it
 */
int __btrfs_setxattr(struct btrfs_trans_handle *trans,
		     struct inode *inode, const char *name,
		     const void *value, size_t size, int flags)
{
	struct btrfs_root *root = BTRFS_I(inode)->root;
	int ret;

	if (trans)
		return do_setxattr(trans, inode, name, value, size, flags);

	trans = btrfs_start_transaction(root, 2);
	if (IS_ERR(trans))
		return PTR_ERR(trans);

	ret = do_setxattr(trans, inode, name, value, size, flags);
	if (ret)
		goto out;

	inode_inc_iversion(inode);
	inode->i_ctime = current_fs_time(inode->i_sb);
	set_bit(BTRFS_INODE_COPY_EVERYTHING, &BTRFS_I(inode)->runtime_flags);
	ret = btrfs_update_inode(trans, root, inode);
	BUG_ON(ret);
out:
	btrfs_end_transaction(trans, root);
	return ret;
}

/*
 * Change the requested timestamp in the given inode.
 * We don't lock across timestamp updates, and we don't log them but
 * we do record the fact that there is dirty information in core.
 */
void
xfs_ichgtime(
	xfs_inode_t	*ip,
	int		flags)
{
	struct inode	*inode = VFS_I(ip);
	timespec_t	tv;
	int		sync_it = 0;

	tv = current_fs_time(inode->i_sb);

	if ((flags & XFS_ICHGTIME_MOD) &&
	    !timespec_equal(&inode->i_mtime, &tv)) {
		inode->i_mtime = tv;
		sync_it = 1;
	}
	if ((flags & XFS_ICHGTIME_CHG) &&
	    !timespec_equal(&inode->i_ctime, &tv)) {
		inode->i_ctime = tv;
		sync_it = 1;
	}

	/*
	 * Update complete - now make sure everyone knows that the inode
	 * is dirty.
	 */
	if (sync_it)
		xfs_mark_inode_dirty_sync(ip);
}

void make_bad_inode(struct inode *inode)
{
	remove_inode_hash(inode);

	inode->i_mode = S_IFREG;
	inode->i_atime = inode->i_mtime = inode->i_ctime =
		current_fs_time(inode->i_sb);
	inode->i_op = &bad_inode_ops;	
	inode->i_fop = &bad_file_ops;	
}

static void update_ctime(struct inode *inode)
{
	struct timespec now = current_fs_time(inode->i_sb);
	if (inode_unhashed(inode) || !inode->i_nlink ||
	    timespec_equal(&inode->i_ctime, &now))
		return;

	inode->i_ctime = CURRENT_TIME_SEC;
	mark_inode_dirty(inode);
}

static __be32
nfsd4_block_proc_layoutcommit(struct inode *inode,
		struct nfsd4_layoutcommit *lcp)
{
	loff_t new_size = lcp->lc_last_wr + 1;
	struct iattr iattr = { .ia_valid = 0 };
	struct iomap *iomaps;
	int nr_iomaps;
	int error;

	nr_iomaps = nfsd4_block_decode_layoutupdate(lcp->lc_up_layout,
			lcp->lc_up_len, &iomaps, 1 << inode->i_blkbits);
	if (nr_iomaps < 0)
		return nfserrno(nr_iomaps);

	if (lcp->lc_mtime.tv_nsec == UTIME_NOW ||
	    timespec_compare(&lcp->lc_mtime, &inode->i_mtime) < 0)
		lcp->lc_mtime = current_fs_time(inode->i_sb);
	iattr.ia_valid |= ATTR_ATIME | ATTR_CTIME | ATTR_MTIME;
	iattr.ia_atime = iattr.ia_ctime = iattr.ia_mtime = lcp->lc_mtime;

	if (new_size > i_size_read(inode)) {
		iattr.ia_valid |= ATTR_SIZE;
		iattr.ia_size = new_size;
	}

	error = inode->i_sb->s_export_op->commit_blocks(inode, iomaps,
			nr_iomaps, &iattr);
	kfree(iomaps);
	return nfserrno(error);
}

const struct nfsd4_layout_ops bl_layout_ops = {
	/*
	 * Pretend that we send notification to the client.  This is a blatant
	 * lie to force recent Linux clients to cache our device IDs.
	 * We rarely ever change the device ID, so the harm of leaking deviceids
	 * for a while isn't too bad.  Unfortunately RFC5661 is a complete mess
	 * in this regard, but I filed errata 4119 for this a while ago, and
	 * hopefully the Linux client will eventually start caching deviceids
	 * without this again.
	 */
	.notify_types		=
			NOTIFY_DEVICEID4_DELETE | NOTIFY_DEVICEID4_CHANGE,
	.proc_getdeviceinfo	= nfsd4_block_proc_getdeviceinfo,
	.encode_getdeviceinfo	= nfsd4_block_encode_getdeviceinfo,
	.proc_layoutget		= nfsd4_block_proc_layoutget,
	.encode_layoutget	= nfsd4_block_encode_layoutget,
	.proc_layoutcommit	= nfsd4_block_proc_layoutcommit,
};

/*
 * Write a page synchronously.
 * Offset is the data offset within the page.
 */
static int
smb_writepage_sync(struct inode *inode, struct page *page,
		   unsigned long pageoffset, unsigned int count)
{
	loff_t offset;
	char *buffer = kmap(page) + pageoffset;
	struct smb_sb_info *server = server_from_inode(inode);
	unsigned int wsize = smb_get_wsize(server);
	int ret = 0;

	offset = ((loff_t)page->index << PAGE_CACHE_SHIFT) + pageoffset;
	VERBOSE("file ino=%ld, fileid=%d, count=%[email protected]%Ld, wsize=%d\n",
		inode->i_ino, SMB_I(inode)->fileid, count, offset, wsize);

	do {
		int write_ret;

		if (count < wsize)
			wsize = count;

		write_ret = server->ops->write(inode, offset, wsize, buffer);
		if (write_ret < 0) {
			PARANOIA("failed write, wsize=%d, write_ret=%d\n",
				 wsize, write_ret);
			ret = write_ret;
			break;
		}
		/* N.B. what if result < wsize?? */
#ifdef SMBFS_PARANOIA
		if (write_ret < wsize)
			PARANOIA("short write, wsize=%d, write_ret=%d\n",
				 wsize, write_ret);
#endif
		buffer += wsize;
		offset += wsize;
		count -= wsize;
		/*
		 * Update the inode now rather than waiting for a refresh.
		 */
		inode->i_mtime = inode->i_atime = current_fs_time(inode->i_sb);
		SMB_I(inode)->flags |= SMB_F_LOCALWRITE;
		if (offset > inode->i_size)
			inode->i_size = offset;
	} while (count);

	kunmap(page);
	return ret;
}

int
zpl_init_acl(struct inode *ip, struct inode *dir)
{
	struct posix_acl *acl = NULL;
	int error = 0;

	if (ITOZSB(ip)->z_acl_type != ZFS_ACLTYPE_POSIXACL)
		return (0);

	if (!S_ISLNK(ip->i_mode)) {
		if (ITOZSB(ip)->z_acl_type == ZFS_ACLTYPE_POSIXACL) {
			acl = zpl_get_acl(dir, ACL_TYPE_DEFAULT);
			if (IS_ERR(acl))
				return (PTR_ERR(acl));
		}

		if (!acl) {
			ip->i_mode &= ~current_umask();
			ip->i_ctime = current_fs_time(ITOZSB(ip)->z_sb);
			mark_inode_dirty(ip);
			return (0);
		}
	}

	if ((ITOZSB(ip)->z_acl_type == ZFS_ACLTYPE_POSIXACL) && acl) {
		umode_t mode;

		if (S_ISDIR(ip->i_mode)) {
			error = zpl_set_acl(ip, ACL_TYPE_DEFAULT, acl);
			if (error)
				goto out;
		}

		mode = ip->i_mode;
		error = posix_acl_create(&acl,GFP_KERNEL, &mode);
		if (error >= 0) {
			ip->i_mode = mode;
			mark_inode_dirty(ip);
			if (error > 0)
				error = zpl_set_acl(ip, ACL_TYPE_ACCESS, acl);
		}
	}
out:
	zpl_posix_acl_release(acl);

	return (error);
}

static int
xfs_set_mode(struct inode *inode, umode_t mode)
{
	int error = 0;

	if (mode != inode->i_mode) {
		struct iattr iattr;

		iattr.ia_valid = ATTR_MODE | ATTR_CTIME;
		iattr.ia_mode = mode;
		iattr.ia_ctime = current_fs_time(inode->i_sb);

		error = -xfs_setattr_nonsize(XFS_I(inode), &iattr, XFS_ATTR_NOACL);
	}

	return error;
}

/*
 * Read a page synchronously.
 */
static int
smb_readpage_sync(struct dentry *dentry, struct page *page)
{
	char *buffer = kmap(page);
	loff_t offset = (loff_t)page->index << PAGE_CACHE_SHIFT;
	struct smb_sb_info *server = server_from_dentry(dentry);
	unsigned int rsize = smb_get_rsize(server);
	int count = PAGE_SIZE;
	int result;

	VERBOSE("file %s/%s, count=%[email protected]%Ld, rsize=%d\n",
		DENTRY_PATH(dentry), count, offset, rsize);

	result = smb_open(dentry, SMB_O_RDONLY);
	if (result < 0)
		goto io_error;

	do {
		if (count < rsize)
			rsize = count;

		result = server->ops->read(dentry->d_inode,offset,rsize,buffer);
		if (result < 0)
			goto io_error;

		count -= result;
		offset += result;
		buffer += result;
		dentry->d_inode->i_atime =
			current_fs_time(dentry->d_inode->i_sb);
		if (result < rsize)
			break;
	} while (count);

	memset(buffer, 0, count);
	flush_dcache_page(page);
	SetPageUptodate(page);
	result = 0;

io_error:
	kunmap(page);
	unlock_page(page);
	return result;
}

int cifs_rmdir(struct inode *inode, struct dentry *direntry)
{
	int rc = 0;
	int xid;
	struct cifs_sb_info *cifs_sb;
	struct cifsTconInfo *pTcon;
	char *full_path = NULL;
	struct cifsInodeInfo *cifsInode;

	cFYI(1, (" cifs_rmdir, inode = 0x%p with ", inode));

	xid = GetXid();

	cifs_sb = CIFS_SB(inode->i_sb);
	pTcon = cifs_sb->tcon;

	down(&inode->i_sb->s_vfs_rename_sem);
	full_path = build_path_from_dentry(direntry);
	up(&inode->i_sb->s_vfs_rename_sem);
	if (full_path == NULL) {
		FreeXid(xid);
		return -ENOMEM;
	}

	rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
			  cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);

	if (!rc) {
		inode->i_nlink--;
		i_size_write(direntry->d_inode,0);
		direntry->d_inode->i_nlink = 0;
	}

	cifsInode = CIFS_I(direntry->d_inode);
	cifsInode->time = 0;	/* force revalidate to go get info when
				   needed */
	direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
		current_fs_time(inode->i_sb);

	kfree(full_path);
	FreeXid(xid);
	return rc;
}

/*
 * Transactional inode timestamp update. Requires the inode to be locked and
 * joined to the transaction supplied. Relies on the transaction subsystem to
 * track dirty state and update/writeback the inode accordingly.
 */
void
xfs_trans_ichgtime(
	struct xfs_trans	*tp,
	struct xfs_inode	*ip,
	int			flags)
{
	struct inode		*inode = VFS_I(ip);
	struct timespec		tv;

	ASSERT(tp);
	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));

	tv = current_fs_time(inode->i_sb);

	if (flags & XFS_ICHGTIME_MOD)
		inode->i_mtime = tv;
	if (flags & XFS_ICHGTIME_CHG)
		inode->i_ctime = tv;
}

/* return 0 on success; non-zero otherwise */
static int orangefs_unlink(struct inode *dir, struct dentry *dentry)
{
	struct inode *inode = dentry->d_inode;
	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
	struct orangefs_kernel_op_s *new_op;
	int ret;

	gossip_debug(GOSSIP_NAME_DEBUG,
		     "%s: called on %s\n"
		     "  (inode %pU): Parent is %pU | fs_id %d\n",
		     __func__,
		     dentry->d_name.name,
		     get_khandle_from_ino(inode),
		     &parent->refn.khandle,
		     parent->refn.fs_id);

	new_op = op_alloc(ORANGEFS_VFS_OP_REMOVE);
	if (!new_op)
		return -ENOMEM;

	new_op->upcall.req.remove.parent_refn = parent->refn;
	strncpy(new_op->upcall.req.remove.d_name, dentry->d_name.name,
		ORANGEFS_NAME_MAX);

	ret = service_operation(new_op, "orangefs_unlink",
				get_interruptible_flag(inode));

	gossip_debug(GOSSIP_NAME_DEBUG,
		     "%s: service_operation returned:%d:\n",
		     __func__,
		     ret);

	op_release(new_op);

	if (!ret) {
		drop_nlink(inode);

		SetMtimeFlag(parent);
		dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
		mark_inode_dirty_sync(dir);
	}
	return ret;
}

/*
 * Change the requested timestamp in the given inode.
 * We don't lock across timestamp updates, and we don't log them but
 * we do record the fact that there is dirty information in core.
 */
void
xfs_ichgtime(
	xfs_inode_t	*ip,
	int		flags)
{
	struct inode	*inode = VFS_I(ip);
	timespec_t	tv;
	int		sync_it = 0;

	tv = current_fs_time(inode->i_sb);

	if ((flags & XFS_ICHGTIME_MOD) &&
	    !timespec_equal(&inode->i_mtime, &tv)) {
		inode->i_mtime = tv;
		ip->i_d.di_mtime.t_sec = (__int32_t)tv.tv_sec;
		ip->i_d.di_mtime.t_nsec = (__int32_t)tv.tv_nsec;
		sync_it = 1;
	}
	if ((flags & XFS_ICHGTIME_CHG) &&
	    !timespec_equal(&inode->i_ctime, &tv)) {
		inode->i_ctime = tv;
		ip->i_d.di_ctime.t_sec = (__int32_t)tv.tv_sec;
		ip->i_d.di_ctime.t_nsec = (__int32_t)tv.tv_nsec;
		sync_it = 1;
	}

	/*
	 * We update the i_update_core field _after_ changing
	 * the timestamps in order to coordinate properly with
	 * xfs_iflush() so that we don't lose timestamp updates.
	 * This keeps us from having to hold the inode lock
	 * while doing this.  We use the SYNCHRONIZE macro to
	 * ensure that the compiler does not reorder the update
	 * of i_update_core above the timestamp updates above.
	 */
	if (sync_it) {
		SYNCHRONIZE();
		ip->i_update_core = 1;
		xfs_mark_inode_dirty_sync(ip);
	}
}

static __be32
nfsd4_block_proc_layoutcommit(struct inode *inode,
		struct nfsd4_layoutcommit *lcp)
{
	loff_t new_size = lcp->lc_last_wr + 1;
	struct iattr iattr = { .ia_valid = 0 };
	struct iomap *iomaps;
	int nr_iomaps;
	int error;

	nr_iomaps = nfsd4_block_decode_layoutupdate(lcp->lc_up_layout,
			lcp->lc_up_len, &iomaps, 1 << inode->i_blkbits);
	if (nr_iomaps < 0)
		return nfserrno(nr_iomaps);

	if (lcp->lc_mtime.tv_nsec == UTIME_NOW ||
	    timespec_compare(&lcp->lc_mtime, &inode->i_mtime) < 0)
		lcp->lc_mtime = current_fs_time(inode->i_sb);
	iattr.ia_valid |= ATTR_ATIME | ATTR_CTIME | ATTR_MTIME;
	iattr.ia_atime = iattr.ia_ctime = iattr.ia_mtime = lcp->lc_mtime;

	if (new_size > i_size_read(inode)) {
		iattr.ia_valid |= ATTR_SIZE;
		iattr.ia_size = new_size;
	}

	error = inode->i_sb->s_export_op->commit_blocks(inode, iomaps,
			nr_iomaps, &iattr);
	kfree(iomaps);
	return nfserrno(error);
}

const struct nfsd4_layout_ops bl_layout_ops = {
	.proc_getdeviceinfo	= nfsd4_block_proc_getdeviceinfo,
	.encode_getdeviceinfo	= nfsd4_block_encode_getdeviceinfo,
	.proc_layoutget		= nfsd4_block_proc_layoutget,
	.encode_layoutget	= nfsd4_block_encode_layoutget,
	.proc_layoutcommit	= nfsd4_block_proc_layoutcommit,
};

/** \<\<private\>\> Read function for TTY
 * @TODO: Why is this copied here from kernel?
 *
 * @param *file   - pointer to file we wanted to read from 
 * @param *buf    - pointer to buffer in kernelspace witch will be filled with data 
 * @param count   - buffer size
 * @param *ppos - pointer to file offset
 *
 * @return Amount of bytes read or error 
 */
static ssize_t proxyfs_tty_real_file_tty_read(struct file * file, char *buf, size_t count, loff_t *ppos)
{
         int i;
         struct tty_struct * tty;
         struct inode *inode;
         struct tty_ldisc *ld = NULL;
	 int state;
 
         tty = (struct tty_struct *)file->private_data;
         inode = file->f_path.dentry->d_inode;
         //if (tty_paranoia_check(tty, inode, "tty_read"))
         //        return -EIO;
         if (!tty || (test_bit(TTY_IO_ERROR, &tty->flags)))
                 return -EIO;
 
         /* We not want to wait for the line discipline to sort out in this
            situation */
         ld = tty_ldisc_ref(tty);
	 if(ld){
	        lock_kernel();
        	if (ld->ops->read){
			state = current->state;
                	i = (ld->ops->read)(tty,file,buf,count);
			current->state = state;
		}
	        else
        	         i = -EIO;
	        tty_ldisc_deref(ld);
        	unlock_kernel();
         	if (i > 0)
                 	inode->i_atime = current_fs_time(inode->i_sb);
		return i;
	 }
	 else
		 return -EAGAIN;
}

static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
	struct orangefs_kernel_op_s *new_op;
	struct inode *inode;
	int ret;

	new_op = op_alloc(ORANGEFS_VFS_OP_MKDIR);
	if (!new_op)
		return -ENOMEM;

	new_op->upcall.req.mkdir.parent_refn = parent->refn;

	fill_default_sys_attrs(new_op->upcall.req.mkdir.attributes,
			      ORANGEFS_TYPE_DIRECTORY, mode);

	strncpy(new_op->upcall.req.mkdir.d_name,
		dentry->d_name.name, ORANGEFS_NAME_MAX);

	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));

	gossip_debug(GOSSIP_NAME_DEBUG,
		     "Mkdir Got ORANGEFS handle %pU on fsid %d\n",
		     &new_op->downcall.resp.mkdir.refn.khandle,
		     new_op->downcall.resp.mkdir.refn.fs_id);

	if (ret < 0) {
		gossip_debug(GOSSIP_NAME_DEBUG,
			     "%s: failed with error code %d\n",
			     __func__, ret);
		goto out;
	}

	inode = orangefs_new_inode(dir->i_sb, dir, S_IFDIR | mode, 0,
				&new_op->downcall.resp.mkdir.refn);
	if (IS_ERR(inode)) {
		gossip_err("*** Failed to allocate orangefs dir inode\n");
		ret = PTR_ERR(inode);
		goto out;
	}

	gossip_debug(GOSSIP_NAME_DEBUG,
		     "Assigned dir inode new number of %pU\n",
		     get_khandle_from_ino(inode));

	d_instantiate(dentry, inode);
	unlock_new_inode(inode);
	dentry->d_time = jiffies + dcache_timeout_msecs*HZ/1000;
	ORANGEFS_I(inode)->getattr_time = jiffies - 1;

	gossip_debug(GOSSIP_NAME_DEBUG,
		     "Inode (Directory) %pU -> %s\n",
		     get_khandle_from_ino(inode),
		     dentry->d_name.name);

	/*
	 * NOTE: we have no good way to keep nlink consistent for directories
	 * across clients; keep constant at 1.
	 */
	SetMtimeFlag(parent);
	dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
	mark_inode_dirty_sync(dir);
out:
	op_release(new_op);
	return ret;
}

static int orangefs_symlink(struct inode *dir,
			 struct dentry *dentry,
			 const char *symname)
{
	struct orangefs_inode_s *parent = ORANGEFS_I(dir);
	struct orangefs_kernel_op_s *new_op;
	struct inode *inode;
	int mode = 755;
	int ret;

	gossip_debug(GOSSIP_NAME_DEBUG, "%s: called\n", __func__);

	if (!symname)
		return -EINVAL;

	if (strlen(symname)+1 > ORANGEFS_NAME_MAX)
		return -ENAMETOOLONG;

	new_op = op_alloc(ORANGEFS_VFS_OP_SYMLINK);
	if (!new_op)
		return -ENOMEM;

	new_op->upcall.req.sym.parent_refn = parent->refn;

	fill_default_sys_attrs(new_op->upcall.req.sym.attributes,
			       ORANGEFS_TYPE_SYMLINK,
			       mode);

	strncpy(new_op->upcall.req.sym.entry_name,
		dentry->d_name.name,
		ORANGEFS_NAME_MAX);
	strncpy(new_op->upcall.req.sym.target, symname, ORANGEFS_NAME_MAX);

	ret = service_operation(new_op, __func__, get_interruptible_flag(dir));

	gossip_debug(GOSSIP_NAME_DEBUG,
		     "Symlink Got ORANGEFS handle %pU on fsid %d (ret=%d)\n",
		     &new_op->downcall.resp.sym.refn.khandle,
		     new_op->downcall.resp.sym.refn.fs_id, ret);

	if (ret < 0) {
		gossip_debug(GOSSIP_NAME_DEBUG,
			    "%s: failed with error code %d\n",
			    __func__, ret);
		goto out;
	}

	inode = orangefs_new_inode(dir->i_sb, dir, S_IFLNK | mode, 0,
				&new_op->downcall.resp.sym.refn);
	if (IS_ERR(inode)) {
		gossip_err
		    ("*** Failed to allocate orangefs symlink inode\n");
		ret = PTR_ERR(inode);
		goto out;
	}

	gossip_debug(GOSSIP_NAME_DEBUG,
		     "Assigned symlink inode new number of %pU\n",
		     get_khandle_from_ino(inode));

	d_instantiate(dentry, inode);
	unlock_new_inode(inode);
	dentry->d_time = jiffies + dcache_timeout_msecs*HZ/1000;
	ORANGEFS_I(inode)->getattr_time = jiffies - 1;

	gossip_debug(GOSSIP_NAME_DEBUG,
		     "Inode (Symlink) %pU -> %s\n",
		     get_khandle_from_ino(inode),
		     dentry->d_name.name);

	SetMtimeFlag(parent);
	dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
	mark_inode_dirty_sync(dir);
	ret = 0;
out:
	op_release(new_op);
	return ret;
}

//.........这里部分代码省略.........
			return error;
	}

	/*
	 * Wait for all direct I/O to complete.
	 */
	inode_dio_wait(inode);

	error = -block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks);
	if (error)
		return error;

	tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE);
	error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0);
	if (error)
		goto out_trans_cancel;

	truncate_setsize(inode, newsize);

	commit_flags = XFS_TRANS_RELEASE_LOG_RES;
	lock_flags |= XFS_ILOCK_EXCL;

	xfs_ilock(ip, XFS_ILOCK_EXCL);

	xfs_trans_ijoin(tp, ip, 0);

	/*
	 * Only change the c/mtime if we are changing the size or we are
	 * explicitly asked to change it.  This handles the semantic difference
	 * between truncate() and ftruncate() as implemented in the VFS.
	 *
	 * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
	 * special case where we need to update the times despite not having
	 * these flags set.  For all other operations the VFS set these flags
	 * explicitly if it wants a timestamp update.
	 */
	if (newsize != oldsize &&
	    !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
		iattr->ia_ctime = iattr->ia_mtime =
			current_fs_time(inode->i_sb);
		iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
	}

	/*
	 * The first thing we do is set the size to new_size permanently on
	 * disk.  This way we don't have to worry about anyone ever being able
	 * to look at the data being freed even in the face of a crash.
	 * What we're getting around here is the case where we free a block, it
	 * is allocated to another file, it is written to, and then we crash.
	 * If the new data gets written to the file but the log buffers
	 * containing the free and reallocation don't, then we'd end up with
	 * garbage in the blocks being freed.  As long as we make the new size
	 * permanent before actually freeing any blocks it doesn't matter if
	 * they get written to.
	 */
	ip->i_d.di_size = newsize;
	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);

	if (newsize <= oldsize) {
		error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
		if (error)
			goto out_trans_abort;

		/*
		 * Truncated "down", so we're removing references to old data
		 * here - if we delay flushing for a long time, we expose
		 * ourselves unduly to the notorious NULL files problem.  So,
		 * we mark this inode and flush it when the file is closed,
		 * and do not wait the usual (long) time for writeout.
		 */
		xfs_iflags_set(ip, XFS_ITRUNCATED);

		/* A truncate down always removes post-EOF blocks. */
		xfs_inode_clear_eofblocks_tag(ip);
	}

	if (iattr->ia_valid & ATTR_MODE)
		xfs_setattr_mode(ip, iattr);
	if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
		xfs_setattr_time(ip, iattr);

	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);

	XFS_STATS_INC(xs_ig_attrchg);

	if (mp->m_flags & XFS_MOUNT_WSYNC)
		xfs_trans_set_sync(tp);

	error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
out_unlock:
	if (lock_flags)
		xfs_iunlock(ip, lock_flags);
	return error;

out_trans_abort:
	commit_flags |= XFS_TRANS_ABORT;
out_trans_cancel:
	xfs_trans_cancel(tp, commit_flags);
	goto out_unlock;
}