mbox series

[bpf,0/2] support SKF_NET_OFF and SKF_LL_OFF on skb frags

Message ID 20250403140846.1268564-1-willemdebruijn.kernel@gmail.com (mailing list archive)
Headers show
Series support SKF_NET_OFF and SKF_LL_OFF on skb frags | expand

Message

Willem de Bruijn April 3, 2025, 2:07 p.m. UTC 
From: Willem de Bruijn <willemb@google.com>

Address a longstanding issue that may lead to missed packets
depending on system configuration.

Ensure that reading from packet contents works regardless of skb
geometry, also when using the special SKF_.. negative offsets to
offset from L2 or L3 header.

Patch 2 is the selftest for the fix.

Willem de Bruijn (2):
  bpf: support SKF_NET_OFF and SKF_LL_OFF on skb frags
  selftests/net: test sk_filter support for SKF_NET_OFF on frags

 include/linux/filter.h                     |   3 -
 kernel/bpf/core.c                          |  21 --
 net/core/filter.c                          |  75 ++++---
 tools/testing/selftests/net/.gitignore     |   1 +
 tools/testing/selftests/net/Makefile       |   2 +
 tools/testing/selftests/net/skf_net_off.c  | 244 +++++++++++++++++++++
 tools/testing/selftests/net/skf_net_off.sh |  28 +++
 7 files changed, 317 insertions(+), 57 deletions(-)
 create mode 100644 tools/testing/selftests/net/skf_net_off.c
 create mode 100755 tools/testing/selftests/net/skf_net_off.sh