Subject: Question regarding VFS programming
From: James D Strandboge <jstrand1@rochester.rr.com>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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Date: 07 Mar 2002 16:16:48 -0500
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I am playing around in the VFS code (fs/namei.c), and was wondering what
is the most efficient way of finding a child subdir if I already have
the mountpoint?  Currently I am doing somethine like:

        <... from_nd initialization ...>

	to =3D kmalloc(PATH_MAX,GFP_KERNEL);
        if (to =3D=3D NULL)
                goto rel_fnd;
        to[0] =3D '\0';=20

        /* build the to pathname */
        strcat (to, from_nd.dentry->d_sb->s_root->d_name.name);
        strcat (to, "/dir_to_find/");

        /* check if the directory exists */
        if (path_init(to, LOOKUP_POSITIVE, &to_nd))
                error =3D path_walk(to, &to_nd);
	if(!error)
		...

This seems totally inefficient to me, but I can't seem to find a better
method.  I do not want to go into the fs code (eg ext2, etc) for a
faster way-- I need to stay up high in VFS.

Thanks!

Jamie Strandboge

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Email:        jstrand1@rochester.rr.com
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