This implements the helper skb_adjust_room() for BPF_SKS_SK_STREAM_VERDICT
programs so we can push/pop headers from the data on recieve. One use
case is to pop TLS headers off kTLS packets.
The first patch implements the helper and the second updates test_sockmap
to use it removing some case handling we had to do earlier to account for
the TLS headers in the kTLS tests.
v1->v2:
Fix error path for TLS case (Daniel)
check mode input is 0 because we don't use it now (Daniel)
Remove incorrect/misleading comment (Lorenz)
Thanks,
John
---
John Fastabend (2):
bpf, sockmap: add skb_adjust_room to pop bytes off ingress payload
bpf, sockmap: update selftests to use skb_adjust_room
net/core/filter.c | 46 ++++++++++++++++++++
.../selftests/bpf/progs/test_sockmap_kern.h | 34 +++++++++++----
tools/testing/selftests/bpf/test_sockmap.c | 27 +++---------
3 files changed, 77 insertions(+), 30 deletions(-)
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