Date: Sat, 7 Dec 2024 14:45:10 -0800 From: Bakul Shah <bakul@iitbombay.org> To: Thomas Laus <lausts@acm.org> Cc: freebsd-virtualization@freebsd.org Subject: Re: Tap device problem on FreeBSD 14.2-RELEASE Message-ID: <C36282E1-2586-457B-832A-E6DEFB872537@iitbombay.org> In-Reply-To: <0fc1d487-b254-4c64-9db1-a982169924e4@acm.org> References: <0fc1d487-b254-4c64-9db1-a982169924e4@acm.org>
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$ uname -v
FreeBSD 14.2-RELEASE releng/14.2-n269506-c8918d6c7412 GENERIC
$ kldstat |grep 'if_.*tap'
$ kldstat -v |grep 'if_.*tap'
388 if_tap
386 if_tuntap
$ ifconfig tap5
ifconfig: interface tap5 does not exist
$ ls -l /dev/tap5
ls: /dev/tap5: No such file or directory
$ sudo ls -l /dev/tap5
crw------- 1 uucp dialer 0x89 Dec 7 14:40 /dev/tap5
$ ifconfig tap5
tap5: flags=3D8802<BROADCAST,SIMPLEX,MULTICAST> metric 0 mtu 1500
options=3D80000<LINKSTATE>
ether 58:9c:fc:10:ff:80
groups: tap
media: Ethernet 1000baseT <full-duplex>
status: no carrier
nd6 options=3D29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
/dev/tap<n> is created on access (if you have the permission to do so)
and then ifconfig works. You may be able to trigger this by adding tap
related lines to /etc/devfs.conf such as
own tap0 $user:$group # replace with user and group you want
...
> On Dec 7, 2024, at 1:37=E2=80=AFPM, Thomas Laus <lausts@acm.org> =
wrote:
>=20
> I used FreeBSD-update to go from 14.1-RELEASE to 14.2-RELEASE and =
there is an issue with creating and using the tap device. The device =
doesn't get created during the boot process and can't be created or used =
after the system is up. The UPDATING file has just one entry concerning =
the tap device and that is change the 'tap' name in all configuration =
files with 'tuntap'. I did that and get an invalid device reply. I =
installed the latest package for vm-bhyve which did not make any =
difference. I also deleted /usr/obj/* and checked out a fresh /usr/src =
and rebuilt FreeBSD-14.2-RELEASE from source without anything working =
differently.
>=20
> If anyone has a working tap device using FreeBSD 14.2-RELEASE, I would =
appreciate you sharing your bhyve portions of /etc/rc.conf, =
/etc/sysctl.conf and /boot/loader.conf files.
>=20
> Thanks
>=20
> Tom
>=20
>=20
> --=20
> Public Keys:
> PGP KeyID =3D 0x5F22FDC1
> GnuPG KeyID =3D 0x620836CF
>=20
>=20
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