[bpf-next,0/2] Annotate kfuncs in .BTF_ids section

Message

Daniel Xu Jan. 3, 2024, 11:31 p.m. UTC

This is a bpf-treewide change that annotates all kfuncs as such inside
.BTF_ids. This annotation eventually allows us to automatically generate
kfunc prototypes from bpftool.

We store this metadata inside a yet-unused flags field inside struct
btf_id_set8 (thanks Kumar!). pahole will be taught where to look.

More details about the full chain of events are available in commit 2's
description.

Daniel Xu (2):
  bpf: btf: Support optional flags for BTF_SET8 sets
  bpf: treewide: Annotate BPF kfuncs in BTF

 drivers/hid/bpf/hid_bpf_dispatch.c              |  4 ++--
 fs/verity/measure.c                             |  2 +-
 include/linux/btf_ids.h                         | 17 ++++++++++++-----
 kernel/bpf/btf.c                                |  3 +++
 kernel/bpf/cpumask.c                            |  2 +-
 kernel/bpf/helpers.c                            |  4 ++--
 kernel/bpf/map_iter.c                           |  2 +-
 kernel/cgroup/rstat.c                           |  2 +-
 kernel/trace/bpf_trace.c                        |  4 ++--
 net/bpf/test_run.c                              |  4 ++--
 net/core/filter.c                               |  8 ++++----
 net/core/xdp.c                                  |  2 +-
 net/ipv4/bpf_tcp_ca.c                           |  2 +-
 net/ipv4/fou_bpf.c                              |  2 +-
 net/ipv4/tcp_bbr.c                              |  2 +-
 net/ipv4/tcp_cubic.c                            |  2 +-
 net/ipv4/tcp_dctcp.c                            |  2 +-
 net/netfilter/nf_conntrack_bpf.c                |  2 +-
 net/netfilter/nf_nat_bpf.c                      |  2 +-
 net/xfrm/xfrm_interface_bpf.c                   |  2 +-
 net/xfrm/xfrm_state_bpf.c                       |  2 +-
 .../selftests/bpf/bpf_testmod/bpf_testmod.c     |  2 +-
 22 files changed, 42 insertions(+), 32 deletions(-)