What kernel version do I need to use bind_phc

[teodly]

I'm using Linux kernel 6.9.9-100.fc39.x86_64, yet socket.so_timestamping returns EINVAL when configure_timestamping is called with Some bind_phc.

SOF_TIMESTAMPING_BIND_PHC is not documented as of Linux 6.10 (with /latest/ in the documentation URL): https://www.kernel.org/doc/html/latest/networking/timestamping.html .

# ethtool --version
ethtool version 6.9
# ethtool -T enpxxx
Time stamping parameters for enpxxx:
Capabilities:
        hardware-transmit
        software-transmit
        hardware-receive
        software-receive
        software-system-clock
        hardware-raw-clock
PTP Hardware Clock: 0
Hardware Transmit Timestamp Modes:
        off
        on
Hardware Receive Filter Modes:
        none
        all
        ptpv1-l4-sync
        ptpv1-l4-delay-req
        ptpv2-l4-sync
        ptpv2-l4-delay-req
        ptpv2-l2-sync
        ptpv2-l2-delay-req
        ptpv2-event
        ptpv2-sync
        ptpv2-delay-req

Capabilities don't include bind-phc, should they?

[davidv1992]

What configuration options were used to compile the kernel? The documentation of the kernel is spotty at best so that it is not in the documentation doesn't mean anything (unfortunately).

[teodly]

It is stock Fedora kernel.

config-6.9.9-100.fc39.x86_64

[davidv1992]

Dove into this, it is a bug on our end. bind_phc can only be done with vclocks, not with the native hardware clocks. Gonna build a fix.

[davidv1992]

Fixed in #70