[RFC nf-next v2 0/2] netfilter: bpf: support prog update

D. Wythe
2023-12-18T04:23:58Z

From: "D. Wythe" <alibuda@linux.alibaba.com>

This patches attempt to implements updating of progs within
bpf netfilter link, allowing user update their ebpf netfilter
prog in hot update manner.

Besides, a corresponding test case has been added to verify
whether the update works.

--
v1:
1. remove unnecessary context, access the prog directly via rcu.
2. remove synchronize_rcu(), dealloc the nf_link via kfree_rcu.
3. check the dead flag during the update.
--
v1->v2:
1. remove unnecessary nf_prog, accessing nf_link->link.prog in direct.

D. Wythe (2):
netfilter: bpf: support prog update
selftests/bpf: Add netfilter link prog update test

net/netfilter/nf_bpf_link.c | 63 ++++++++++++----
.../bpf/prog_tests/netfilter_link_update_prog.c | 83 ++++++++++++++++++++++
.../bpf/progs/test_netfilter_link_update_prog.c | 24 +++++++
3 files changed, 155 insertions(+), 15 deletions(-)
create mode 100644 tools/testing/selftests/bpf/prog_tests/netfilter_link_update_prog.c
create mode 100644 tools/testing/selftests/bpf/progs/test_netfilter_link_update_prog.c

--
1.8.3.1