Re: epair(4)

In message <406249F9-B0FC-4E22-9402-683531321E72@FreeBSD.org>, Kristof 
Provost
writes:
> On 15 May 2025, at 20:59, Cy Schubert wrote:
> > In message <20250515162552.9209B20E@slippy.cwsent.com>, Cy Schubert wri=
> tes:
> >> Over the last couple of days epair(4) fails to set up when an IP addre=
> ss is
> >> specified.
> >>
> >> bob# service jail onestart test2
> >> Starting jails: cannot start jail  "test2":
> >> epair0a
> >> ifconfig: ioctl (SIOCAIFADDR): Invalid argument
> >> jail: test2: /sbin/ifconfig epair0a inet 10.1.1.70 netmask 0xffffff00 =
> up:
> >> failed
> >> .
> >> bob# ifconfig epair0a inet 10.1.1.70 netmask 0xffffff00
> >> ifconfig: ioctl (SIOCAIFADDR): Invalid argument
> >> bob# ifconfig epair0a inet up
> >> bob#
> >
> > This regression is caused by b61850c4e6f6.
> >
> Is epair0a a member of a bridge? If so, that=E2=80=99s a configuration er=
> ror which is now prevented (by default).

Yes, epair0a, member of bridge0 is prevented from coming up.

My jail configuration:

test2 {
  $if                 = "0";                  # Jail ID number
  $ip_addr            = "10.1.1.71";      # Jail ipv4 address
  $netmask            = "0xffffff00";
  $ip_host            = "10.1.1.70";          # Gateway or host's ipv4 
address
  $ip_route           = "10.1.1.254";          # Gateway or host's ipv4 
address
  $ip6_addr           = "fc00:1:1:1::47";      # Jail ipv6 address
  $ip6_route          = "fc00:1:1:1::fffe";   # Gateway or host's ipv6 
address
  vnet;
  vnet.interface      = "epair${if}b";
  allow.set_hostname  = "1";
  exec.prestart       = "/sbin/sysctl kern.sugid_coredump=1";
  exec.prestart       = "ifconfig epair${if} create up";
  exec.prestart      += "ifconfig bridge0 addm epair${if}a";
  # exec.prestart      += "ifconfig bridge0 addm sk0";
  exec.prestart      += "/sbin/ifconfig epair${if}a inet ${ip_host} netmask 
${netmask} up";
  # exec.prestart      += "/sbin/route change -host ${ip_host} -iface 
epair${if}a";
  # exec.prestart      += "/sbin/route add -host ${ip_addr} -iface 
epair${if}a";
  exec.start          = "/sbin/ifconfig epair${if}b inet ${ip_addr} netmask 
${netmask} up";
  exec.start         += "/sbin/ifconfig epair${if}b inet6 ${ip6_addr} up";
  exec.start         += "/sbin/route add default -gateway ${ip_route}";
  exec.start         += "/sbin/route add -inet6 default -gateway 
${ip6_route}";
  exec.start         += "/bin/sh /etc/rc";
  exec.stop           = "/bin/sh /etc/rc.shutdown";
  exec.poststop       = "ifconfig epair${if}a destroy";
  # exec.poststop      += "ifconfig bridge0 deletem sk0";
}



-- 
Cheers,
Cy Schubert <Cy.Schubert@cschubert.com>
FreeBSD UNIX:  <cy@FreeBSD.org>   Web:  https://FreeBSD.org
NTP:           <cy@nwtime.org>    Web:  https://nwtime.org

			e^(i*pi)+1=0