[v2,bpf-next,0/2] bpf: add a ksym BPF iterator

Message

Alan Maguire July 1, 2022, 9:26 a.m. UTC

a ksym BPF iterator would be useful as it would allow more flexible
interactions with kernel symbols than are currently supported; it could
for example create more efficient map representations for lookup,
speed up symbol resolution etc.

The idea was initially discussed here [1].

Changes since RFC [2]:

- change name of iterator (and associated structures/fields) to "ksym" 
  (Andrii, patches 1, 2)
- remove dependency on CONFIG_PROC_FS; it was used for other BPF
  iterators, and I assumed it was needed because of seq ops but I
  don't think it is required on digging futher (Andrii, patch 1)

[1] https://lore.kernel.org/all/YjRPZj6Z8vuLeEZo@krava/
[2] https://lore.kernel.org/all/[e-mail]/


Alan Maguire (2):
  bpf: add a ksym BPF iterator
  selftests/bpf: add a ksym iter subtest

 kernel/kallsyms.c                                 | 89 +++++++++++++++++++++++
 tools/testing/selftests/bpf/prog_tests/bpf_iter.c | 16 ++++
 tools/testing/selftests/bpf/progs/bpf_iter_ksym.c | 71 ++++++++++++++++++
 3 files changed, 176 insertions(+)
 create mode 100644 tools/testing/selftests/bpf/progs/bpf_iter_ksym.c