Merge tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Daniel Borkmann says:

====================
pull-request: bpf-next 2023-08-16

We've added 17 non-merge commits during the last 6 day(s) which contain
a total of 20 files changed, 1179 insertions(+), 37 deletions(-).

The main changes are:

1) Add a BPF hook in sys_socket() to change the protocol ID
   from IPPROTO_TCP to IPPROTO_MPTCP to cover migration for legacy
   applications, from Geliang Tang.

2) Follow-up/fallout fix from the SO_REUSEPORT + bpf_sk_assign work
   to fix a splat on non-fullsock sks in inet[6]_steal_sock,
   from Lorenz Bauer.

3) Improvements to struct_ops links to avoid forcing presence of
   update/validate callbacks. Also add bpf_struct_ops fields documentation,
   from David Vernet.

4) Ensure libbpf sets close-on-exec flag on gzopen, from Marco Vedovati.

5) Several new tcx selftest additions and bpftool link show support for
   tcx and xdp links, from Daniel Borkmann.

6) Fix a smatch warning on uninitialized symbol in
   bpf_perf_link_fill_kprobe, from Yafang Shao.

7) BPF selftest fixes e.g. misplaced break in kfunc_call test,
   from Yipeng Zou.

8) Small cleanup to remove unused declaration bpf_link_new_file,
   from Yue Haibing.

9) Small typo fix to bpftool's perf help message, from Daniel T. Lee.

* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next:
  selftests/bpf: Add mptcpify test
  selftests/bpf: Fix error checks of mptcp open_and_load
  selftests/bpf: Add two mptcp netns helpers
  bpf: Add update_socket_protocol hook
  bpftool: Implement link show support for xdp
  bpftool: Implement link show support for tcx
  selftests/bpf: Add selftest for fill_link_info
  bpf: Fix uninitialized symbol in bpf_perf_link_fill_kprobe()
  net: Fix slab-out-of-bounds in inet[6]_steal_sock
  bpf: Document struct bpf_struct_ops fields
  bpf: Support default .validate() and .update() behavior for struct_ops links
  selftests/bpf: Add various more tcx test cases
  selftests/bpf: Clean up fmod_ret in bench_rename test script
  selftests/bpf: Fix repeat option when kfunc_call verification fails
  libbpf: Set close-on-exec flag on gzopen
  bpftool: fix perf help message
  bpf: Remove unused declaration bpf_link_new_file()
====================

Link: https://lore.kernel.org/r/20230816212840.1539-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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