static int ocfs2_file_open(struct inode *inode, struct file *file)
{
	int status;
	int mode = file->f_flags;
	struct ocfs2_inode_info *oi = OCFS2_I(inode);

	trace_ocfs2_file_open(inode, file, file->f_path.dentry,
			      (unsigned long long)OCFS2_I(inode)->ip_blkno,
			      file->f_path.dentry->d_name.len,
			      file->f_path.dentry->d_name.name, mode);

	if (file->f_mode & FMODE_WRITE) {
		status = dquot_initialize(inode);
		if (status)
			goto leave;
	}

	spin_lock(&oi->ip_lock);

	/* Check that the inode hasn't been wiped from disk by another
	 * node. If it hasn't then we're safe as long as we hold the
	 * spin lock until our increment of open count. */
	if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
		spin_unlock(&oi->ip_lock);

		status = -ENOENT;
		goto leave;
	}

	if (mode & O_DIRECT)
		oi->ip_flags |= OCFS2_INODE_OPEN_DIRECT;

	oi->ip_open_count++;
	spin_unlock(&oi->ip_lock);

	status = ocfs2_init_file_private(inode, file);
	if (status) {
		/*
		 * We want to set open count back if we're failing the
		 * open.
		 */
		spin_lock(&oi->ip_lock);
		oi->ip_open_count--;
		spin_unlock(&oi->ip_lock);
	}

leave:
	return status;
}

Unknown