From owner-freebsd-hackers  Mon Feb 11  0:40:20 2002
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Date: Mon, 11 Feb 2002 09:40:49 +0100
From: =?ISO-8859-2?Q?Pawe=B3_Jakub_Dawidek?= <nick@garage.freebsd.pl>
To: freebsd-hackers@freebsd.org
Subject: Devices and namei(9).
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Hi.

I got problem with namei(9) and some devices.
Example (catching syscall open()):
static int
n_open(register struct proc *p, register struct open_args *ea)
{
[...]
	long finode =3D 0;
	struct nameidata nd, *ndptr;
[...]
	ndptr =3D &nd;
	NDINIT(ndptr, LOOKUP, FOLLOW | SAVENAME, UIO_USERSPACE, ea->path, p);
	if (!namei(ndptr))
		if (!VOP_GETATTR(ndptr->ni_vp, &va, p->p_ucred, p))
			finode =3D va.va_fileid;
[...]
}

I use namei() coz i want file inode.
But when namei() will be called some devices are blocking.
For example if I do in this way:
[...]
	return open(p, ea);
	if (!namei(ndptr))
[...]
Everything is oke, but:
	namei(ndptr)
	return open(p, ea);
isn't.
% mpg123 some.mp3
Can't open /dev/dsp!

And /dev/dsp is completely fucked up, it is still busy even if I unload my
module. Only reboot can free it.

So what's going on?
Or maybe there is some other way to get file inode?

--=20
Pawe=B3 Jakub Dawidek
Network Administrator.
Am I Evil? Yes, I Am.

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