netdev - ethtool module info only reports hex info

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Message-ID: <CAAV7vNcRbVb00vp_u1q0f6jjqwVhx4GFAzWoP0AsRA1MhAfeBw@mail.gmail.com>
Date: Thu, 16 May 2024 09:23:05 +0200
From: Frederic TOULBOT <ftoulbot@...leway.com>
To: mkubecek@...e.cz, netdev@...r.kernel.org
Subject: ethtool module info only reports hex info

Hello, I have the impression that there is an unwanted change in the
output of the ethtool -m command with a certain QSFP type

I tested versions 6.5-1 / 5.16-1 / 5.4-1

The bug seems very close to this one
https://lists.openwall.net/netdev/2023/11/23/118

lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.4 LTS
Release: 22.04
Codename: jammy

With ethtool 6.5-1 and 5.16-1
~# ethtool -m ens1f1
Offset Values
------ ------
0x0000: 11 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0010: 00 00 00 00 00 00 1d 0e 00 00 81 85 00 00 00 00
0x0020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

And with version 5.4.1, we receive the expected result


lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04 LTS
Release: 20.04
Codename: focal

dpkg -l ethtool
ii  ethtool        1:5.4-1      amd64        display or change
Ethernet device settings
~# ethtool -m ens1f0
Identifier                                : 0x11 (QSFP28)
Extended identifier                       : 0x10
Extended identifier description           : 1.5W max. Power consumption
Extended identifier description           : No CDR in TX, No CDR in RX
Extended identifier description           : High Power Class (> 3.5 W)
not enabled
Connector                                 : 0x23 (No separable connector)
Transceiver codes                         : 0x80 0x00 0x00 0x00 0x00
0x00 0x00 0x00
Transceiver type                          : 100G Ethernet: 100G
Base-CR4 or 25G Base-CR CA-L
Encoding                                  : 0x05 (64B/66B)
BR, Nominal                               : 25500Mbps
Rate identifier                           : 0x00
Length (SMF,km)                           : 0km
Length (OM3 50um)                         : 0m
Length (OM2 50um)                         : 0m
Length (OM1 62.5um)                       : 0m
Length (Copper or Active cable)           : 2m
Transmitter technology                    : 0xa0 (Copper cable unequalized)
Attenuation at 2.5GHz                     : 7db
Attenuation at 5.0GHz                     : 10db
Attenuation at 7.0GHz                     : 13db
Attenuation at 12.9GHz                    : 18db
Vendor name                               : CISCO-PUREOPTICS
Vendor OUI                                : 00:00:00
Vendor PN                                 : QSFP-4SFP25G-CU2
Vendor rev                                : 6
Vendor SN                                 : M9BE9185
Date code                                 : 220412
Revision Compliance                       : SFF-8636 Rev 2.5/2.6/2.7
Module temperature                        : 29.05 degrees C / 84.30 degrees F
Module voltage                            : 3.3157 V
Alarm/warning flags implemented           : Yes
Laser tx ...