[PATCH bpf-next 0/6] bpf: Add syscall common attrs support for xdp link_create

[Leon Hwang <leon.hwang@linux.dev>]

I'm planning to add syscall common attrs support for LINK_CREATE cmd.

This is the first series for the plan, that adds syscall common attrs
support for xdp LINK_CREATE.

Thereafter, retire the tracepoint bpf_xdp_link_attach_failed, because
the underlying driver's error can be back-propagated to user space via
the syscall common attrs.

Leon Hwang (6):
  bpf: Add syscall common attrs support for link_create
  bpf: Add syscall common attrs support for xdp link_create
  bpf: Retire tracepoint bpf_xdp_link_attach_failed
  libbpf: Factor out __bpf_sys_fd helper
  libbpf: Add bpf_link_create_log API
  selftests/bpf: Add tests to verify link_create logs

 include/linux/netdevice.h                     |   3 +-
 include/trace/events/xdp.h                    |  17 ---
 kernel/bpf/syscall.c                          |  36 +++--
 net/core/dev.c                                |   7 +-
 tools/lib/bpf/bpf.c                           |  59 +++++---
 tools/lib/bpf/bpf.h                           |   5 +
 tools/lib/bpf/libbpf.map                      |   1 +
 .../selftests/bpf/prog_tests/xdp_attach.c     |  65 ---------
 .../selftests/bpf/prog_tests/xdp_link.c       | 132 ++++++++++++++++++
 .../bpf/progs/test_xdp_attach_fail.c          |  54 -------
 10 files changed, 215 insertions(+), 164 deletions(-)
 delete mode 100644 tools/testing/selftests/bpf/progs/test_xdp_attach_fail.c

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2.55.0