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Date:      Tue, 03 Dec 2024 16:31:33 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 283102] Dumpon to network cannot handle renamed interfaces properly
Message-ID:  <bug-283102-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D283102

            Bug ID: 283102
           Summary: Dumpon to network cannot handle renamed interfaces
                    properly
           Product: Base System
           Version: 13.4-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: grembo@FreeBSD.org

This used to panic, which was fixed in #273715.

There's still an issue that the admin basically has to decide if dumpon sho=
uld
work when enabled on boot or when it's enabled on the running system, as
dumpdev is set before interface renaming happens.

Example:=20

    ifconfig_vtnet0_name=3D"uplink"
    ifconfig_uplink=3D"inet 192.168.255.3/24"
    defaultrouter=3D"192.168.255.1"

    vlans_uplink=3D"vlanone vlantwo"

    create_args_vlanone=3D"vlan 1001"
    ifconfig_vlanone=3D"inet 10.1.1.1/24"

    create_args_vlantwo=3D"vlan 1002"
    ifconfig_vlantwo=3D"inet 10.1.2.1/24"

    dumpdev=3D"uplink"
    dumpon_flags=3D"-k /root/netdump_public.pem -i 0 -c 192.168.255.3 -s
192.168.255.1 -g 192.168.255.1"

The example above will not work when started during boot (for which
dumpdev=3D"vtnet0" would be required), but will after the system is running.

Not sure if this is a "kern" issue or more of a userland rc script issue
(depending on where it is fixed). It might be possible to track renamed dev=
ices
well enough, so that dumpdev=3Dvtnet0 would always work).

I tested this last over a year ago, but I'm quite confident this is still t=
he
status quo.

--=20
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