Date: 24 May 2004 01:06:17 +0200 From: "Arno J. Klaassen" <arno@heho.snv.jussieu.fr> To: freebsd-hackers@freebsd.org Subject: early attaching tap0 Message-ID: <wp7jv2pwuu.fsf@heho.snv.jussieu.fr>
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--=-=-=
Hello,
ehmm, i hesitate writing to this list since I'm really
not a hacker, but I have a problem I seemingly cannot
resolve :
I would like the "device tap" entry of my kernel-config
to create and open an ethernet-device, rather
than just initialising the necessary kernel structures.
I made the following diff (needs "COPTFLAGS = -O -pipe -DTAP_INIT_ETHER"
since I do not know how to implement correctly
a kernel option ...) :
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Content-Type: text/x-patch
Content-Disposition: attachment; filename=tap.patch
Index: net/if_tap.c
===================================================================
RCS file: /home/ncvs/src/sys/net/if_tap.c,v
retrieving revision 1.42
diff -r1.42 if_tap.c
125a126,132
> #if defined (TAP_INIT_ETHER)
> #include <net/if_types.h>
> static int tap_need_init = 1;
> dev_t tap0dev;
> void tapether(void);
> #endif /* defined (TAP_INIT_ETHER) */
>
140c147
< int s;
---
> intrmask_t s;
156a164,168
> #if defined (TAP_INIT_ETHER)
> tap0dev = make_dev(&tap_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600,
> "tap0");
> tapcreate (tap0dev);
> #endif /* defined (TAP_INIT_ETHER) */
264c276
< static void
---
> void
315a328,336
> #if defined (TAP_INIT_ETHER)
> if (tap_need_init == 1) {
> ifp->if_type = IFT_ETHER;
> ifp->if_baudrate = 1200;
> tp->tap_flags |= TAP_OPEN;
> tp->tap_pid = 0; /* curproc->p_pid; */
> tap_need_init = 0;
> }
> #endif
325a347
>
892a915
>
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A kernel with this patch boots OK single user, but when going
multi-user it panics randomly
(sorry Thomas for blaming atapicam, I thouht I doublechecked
outcommenting COPTFLAGS before contacting you, I'm not sure
I did everything well ...)
I made similar changes to -stable and RELENG_5_2 which work
OK (i.e. no panics, stable system), but against -current
I am in the mist.
If ever someone has a quick idea about what I am doing wrong,
thanx a lot in advance.
Regards, Arno
--=-=-=--
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