Re: namei() and opening files in the kernel

Matthias Urlichs (smurf@smurf.noris.de)
Wed, 1 May 1996 09:19:30 +0100

In linux.dev.kernel, article <199604300437.AAA02592@laufey.cs.cornell.e=
du>,
Gerry Toll <gtoll@cs.cornell.edu> writes:
>=20
> I'm trying to implement a pseudo-ethernet card using a character devi=
ce-based=20
> network interface being developed here at Cornell. I am trying to acc=
ess the=20
> character device file from within the kernel. Currently, I am trying =
to use=20
> namei() to get the inode for the device. The namei() call appears to =
fail in a=20
> call to find_vma().

Possibly you forgot to call set_fs(get_ds()), to tell the kernel that y=
our
file name is in kernel space already.

This trick is used several times in the kernel; look for it.

--=20
Stockmayer's Theorem: If it looks easy, it's tough. If it looks tough=
,
it's damn near impossible.
--=20
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=20
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