This patch set is a result of a discussion we had around the RFC patchset from
Ilya [1]. The fix for the narrow loads from the RFC series is still relevant,
but this series does not depend on it. Nor is it required to unbreak sk_lookup
tests on BE, if this series gets applied.
To summarize the takeaways from [1]:
1) we want to make 2-byte load from ctx->remote_port portable across LE and BE,
2) we keep the 4-byte load from ctx->remote_port as it is today - result varies
on endianess of the platform.
[1] https://lore.kernel.org/bpf/20220222182559.2865596-2-iii@xxxxxxxxxxxxx/
v1 -> v2:
- Remove needless check that 4-byte load is from &ctx->remote_port offset
(Martin)
[v1]: https://lore.kernel.org/bpf/20220317165826.1099418-1-jakub@xxxxxxxxxxxxxx/
Jakub Sitnicki (3):
bpf: Treat bpf_sk_lookup remote_port as a 2-byte field
selftests/bpf: Fix u8 narrow load checks for bpf_sk_lookup remote_port
selftests/bpf: Fix test for 4-byte load from remote_port on big-endian
net/core/filter.c | 20 +++++++++++++++++--
.../selftests/bpf/progs/test_sk_lookup.c | 13 ++++++++----
2 files changed, 27 insertions(+), 6 deletions(-)
--
2.35.1
