Date: Mon, 20 Nov 2023 22:23:31 +0100 From: Franco Fichtner <franco@opnsense.org> To: Kristof Provost <kp@FreeBSD.org> Cc: Mike Karels <mike@karels.net>, =?utf-8?Q?Mina_Gali=C4=87?= <freebsd@igalic.co>, Zhenlei Huang <zlei@FreeBSD.org>, Kyle Evans <kevans@FreeBSD.org>, freebsd-net@freebsd.org Subject: Re: How to tell if a network interface was renamed (and from what) Message-ID: <12724698-9B26-4CC2-BDBE-8142675BA4A7@opnsense.org> In-Reply-To: <B514CB40-036E-442F-98E9-EFCF74EC8BCE@opnsense.org> References: <pdHC0ObBkAbx2HfFIhWYaB5-dmQDEUzNTWvVVJAuJV7FWdWWeSwybVFD-uyBUxPlqDRpAW7D1aAZsbrTxEj9kqsq7ESgO41srPmS-PcXGqw=@igalic.co> <E5F5F61E-3827-404A-A46F-BBCF45A29A82@FreeBSD.org> <9eef5488-e8da-4edd-bc00-baeb5aaf4a23@FreeBSD.org> <ptnVEMJ_x48tdYePN4iYRiEW2vWqwulbEOUJ4dQ1cKGkxNXZPPfdEVHdJKNHFfs2onxNipVZKPwDZZKlDv1peS1Xttim1VitMFsdUiTkAKE=@igalic.co> <032BADD4-0A49-42E2-BAAB-40D2F76C64B9@FreeBSD.org> <rvRLOlpJc9xIf67ZwmZ4Si6TN2VtmIuyuguoQgEk5NTOeqsqkAwB_9KvlMbW6y-npSjCC2lmLVXbD4oIqyKJdDboThcWiehF_hU0L9D6GZc=@igalic.co> <31B38FCE-0B67-4122-A202-568150E971E1@karels.net> <F2536F44-5C61-4AE3-BEDA-705DD660A8F7@FreeBSD.org> <B514CB40-036E-442F-98E9-EFCF74EC8BCE@opnsense.org>
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FWIW, here is the relevant ifinfo output of a sample machine: # ifinfo | grep ^Interface Interface igb0 (igb0): Interface igb1 (igb1): Interface igb2 (igb2): Interface igb3 (igb3): Interface enc0 (enc0): Interface lo0 (lo0): Interface pflog0 (pflog0): Interface pfsync0 (pfsync0): Interface lagg0 (lagg0): Interface igb2_vlan42 (vlan0): Interface vlan0.1.23 (vlan1): Interface vlan0.3 (vlan2): Interface vlan0.5.6.7 (vlan3): Interface vlan01. (vlan4): Interface vlan06 (vlan5): Interface vlan08 (vlan6): Interface qinq0.123 (vlan7): Interface gre2 (gre2): Interface gre0 (gre0): Interface gif4 (gif4): Interface gif1 (gif1): Interface gif0 (gif0): Interface l2tp0 (ng0): Interface bridge0 (bridge0): Interface lo1 (lo1): Interface lo2 (lo2): Interface ovpns2 (tap2): Interface ovpnc1 (tun1): Interface ovpnc3 (tun3): Interface ovpns4 (tun4): Interface wg0 (wg0): Interface wg1 (wg1): > On 20. Nov 2023, at 22:16, Franco Fichtner <franco@opnsense.org> = wrote: >=20 >=20 >> On 20. Nov 2023, at 21:56, Kristof Provost <kp@FreeBSD.org> wrote: >>=20 >> I=E2=80=99d look in the direction of just adding a field to struct = ifnet with the original interface name (likely easily done in = if_attach()), along with a new ioctl to retrieve that field. >=20 > ifconfig_get_orig_name() already exists, but apart from wlandebug > nothing is using it. >=20 > The internally used IFDATA_DRIVERNAME also appears in ifinfo > (not installed in base) and bsnmpd but that's it. >=20 > if_dname is the target and it exists in ifnet struct along with > a man page entry in inet(9). >=20 > All that is really missing is a way to print it via ifconfig command. >=20 >=20 > Cheers, > Franco
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