Add recent socket timestamping flags for Linux and Android

[fishilico]

Description

Linux (and Android) defines 3 more flags for socket option SO_TIMESTAMPING.

Sources

• SOF_TIMESTAMPING_BIND_PHC introduced in Linux 5.14 (https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d463126e23f112629edb01594141ca437a92a108)
• SOF_TIMESTAMPING_OPT_ID_TCP introduced in Linux 6.2 (https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b534dc46c8ae0165b1b2509be24dbea4fa9c4011)
• SOF_TIMESTAMPING_OPT_RX_FILTER introduced in Linux 6.12 (https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=be8e9eb3750639aa5cffb3f764ca080caed41bd0)

These flags are defined in https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/linux/net_tstamp.h?h=v6.13

Android C library (bionic) picked this flags up: https://android.googlesource.com/platform//bionic/+/9cdc362a2f7463670a766400defcd332a9edfe19/libc/kernel/uapi/linux/net_tstamp.h

Checklist

• Relevant tests in libc-test/semver have been updated
• No placeholder or unstable values like *LAST or *MAX are
  included (see #3131)
• Tested locally (cd libc-test && cargo test --target mytarget);
  especially relevant for platforms that may not be checked in CI

[rustbot]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @tgross35 (or someone else) some time within the next two weeks.

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[rustbot]

Some changes occurred in the Android module

cc @maurer

[fishilico]

I see the CI reports:

 cargo:warning=/checkout/target/x86_64-unknown-linux-gnu/debug/build/libc-test-7132206631aec557/out/main.c:47700:89:
error: 'SOF_TIMESTAMPING_OPT_RX_FILTER' undeclared here (not in a function);
did you mean 'SOF_TIMESTAMPING_OPT_ID_TCP'?
 cargo:warning=47700 |             static const unsigned int __test_const_SOF_TIMESTAMPING_OPT_RX_FILTER_val = SOF_TIMESTAMPING_OPT_RX_FILTER;
 cargo:warning=      |                                                                                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 cargo:warning=      |                                                                                         SOF_TIMESTAMPING_OPT_ID_TCP

and I guess that's because the CI uses Ubuntu 24.10, which currently packages linux-headers-6.11.0-18. SOF_TIMESTAMPING_OPT_RX_FILTER was introduced later, in Linux 6.12.

What is the usual approach regarding kernel changes not present in the headers used by the CI yet?

[tgross35]

You can update the test crate's build.rs, there are overrides that can be set for each OS

[fishilico]

Thanks for the help! I am trying to update libc-test/build.rs to make the CI pass.

[tgross35]

Thanks!