UIO_NOCOPY in smbfs

Jonas Trollvik jontro at gmail.com
Thu Mar 24 11:58:15 PST 2005

How hard would it be to add the UIO_NOCOPY functionality in smbfs?

This is required for sendfile(2) to work

in  /usr/src/sys/vfs/smbfs/smbfs_io.c on line 183 this exists:
         * Protect against method which is not supported for now
        if (uiop->uio_segflg == UIO_NOCOPY)
                return EOPNOTSUPP;
EOPNOTSUPP is also the error that sendfile returns.

If it's not too hard, I might give it a try as a newbeginner kernel
hacker, given the right directions...
I've seen this error reported on various places since this problem
aslo exists in freebsd

Jonas Trollvik

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