In the original sockmap implementation we got away with using an
array similar to devmap. However, unlike devmap where an ifindex
has a nice 1:1 function into the map we have found some use cases
with sockets that need to be referenced using longer keys.
This series adds support for a sockhash map reusing as much of
the sockmap code as possible. I made the decision to add sockhash
specific helpers vs trying to generalize the existing helpers
because (a) they have sockmap in the name and (b) the keys are
different types. I prefer to be explicit here rather than play
type games or do something else tricky.
To test this we duplicate all the sockmap testing except swap out
the sockmap with a sockhash.
v2: fix file stats and add v2 tag
---
John Fastabend (3):
bpf: sockmap, refactor sockmap routines to work with hashmap
bpf: sockmap, add hash map support
bpf: selftest additions for SOCKHASH
include/linux/bpf.h | 8
include/linux/bpf_types.h | 1
include/linux/filter.h | 3
include/net/tcp.h | 3
include/uapi/linux/bpf.h | 6
kernel/bpf/core.c | 1
kernel/bpf/sockmap.c | 638 +++++++++++++++++++---
kernel/bpf/verifier.c | 14
net/core/filter.c | 89 ++-
tools/bpf/bpftool/map.c | 1
tools/include/uapi/linux/bpf.h | 6
tools/testing/selftests/bpf/Makefile | 3
tools/testing/selftests/bpf/test_sockhash_kern.c | 4
tools/testing/selftests/bpf/test_sockmap.c | 27 +
tools/testing/selftests/bpf/test_sockmap_kern.c | 340 ------------
tools/testing/selftests/bpf/test_sockmap_kern.h | 340 ++++++++++++
16 files changed, 1034 insertions(+), 450 deletions(-)
create mode 100644 tools/testing/selftests/bpf/test_sockhash_kern.c
create mode 100644 tools/testing/selftests/bpf/test_sockmap_kern.h
--
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