mbox series

[RFC,v2,bpf-next,0/2] bpf: Enable bpf_skc_to_* sock casting helper to networking prog type

Message ID 20200915231857.1306320-1-kafai@fb.com
Headers show
Series bpf: Enable bpf_skc_to_* sock casting helper to networking prog type | expand

Message

Martin KaFai Lau Sept. 15, 2020, 11:18 p.m. UTC 
This set allows networking prog type to directly read fields from
the in-kernel socket type, e.g. "struct tcp_sock".

Patch 2 has the details on the use case.

It is currently under RFC since it needs proper tests and it builds on
top of Lorenz's patches: 
   https://lore.kernel.org/bpf/20200910125631.225188-1-lmb@cloudflare.com/

v2:
- Add ARG_PTR_TO_SOCK_COMMON_OR_NULL (Lorenz)

Martin KaFai Lau (2):
  bpf: Move the PTR_TO_BTF_ID check to check_reg_type()
  bpf: Enable bpf_skc_to_* sock casting helper to networking prog type

 include/linux/bpf.h   |  1 +
 kernel/bpf/verifier.c | 97 +++++++++++++++++++++++++++++--------------
 net/core/filter.c     | 73 ++++++++++++++++++++++----------
 3 files changed, 117 insertions(+), 54 deletions(-)