netdev - [PATCH v2 bpf-next 0/9] bpf: Network Resource Manager (NRM)

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Message-ID: <20190223010703.678070-1-brakmo@fb.com>
Date:   Fri, 22 Feb 2019 17:06:54 -0800
From:   brakmo <brakmo@...com>
To:     netdev <netdev@...r.kernel.org>
CC:     Martin Lau <kafai@...com>, Alexei Starovoitov <ast@...com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Kernel Team <Kernel-team@...com>
Subject: [PATCH v2 bpf-next 0/9] bpf: Network Resource Manager (NRM)

Network Resource Manager is a framework for limiting the bandwidth used
by v2 cgroups. It consists of 4 BPF helpers and a sample BPF program to
limit egress bandwdith as well as a sample user program and script to
simplify NRM testing.

The sample NRM BPF program is not meant to be production quality, it is
provided as proof of concept. A lot more information, including sample
runs in some cases, are provided in the commit messages of the individual
patches.

Two more BPF programs, one to limit ingress and one that limits egress
and uses fq's Earliest Departure Time feature (EDT), will be provided in an
upcomming patchset.

Changes from v1 to v2:
  * bpf_tcp_enter_cwr can only be called from a cgroup skb egress BPF
    program (otherwise load or attach will fail) where we already hold
    the sk lock. Also only applies for ESTABLISHED state.
  * bpf_skb_ecn_set_ce uses INET_ECN_set_ce()
  * bpf_tcp_check_probe_timer now uses tcp_reset_xmit_timer. Can only be
    used by egress cgroup skb programs.
  * removed load_cg_skb user program. 
  * nrm bpf egress program checks packet header in skb to determine
    ECN value. Now also works for ECN enabled UDP packets.
    Using ECN_ defines instead of integers.
  * NRM script test program now uses bpftool instead of load_cg_skb

Martin KaFai Lau (2):
  bpf: Remove const from get_func_proto
  bpf: Add bpf helper bpf_tcp_enter_cwr

brakmo (7):
  bpf: Test bpf_tcp_enter_cwr in test_verifier
  bpf: add bpf helper bpf_skb_ecn_set_ce
  bpf: Add bpf helper bpf_tcp_check_probe_timer
  bpf: sync bpf.h to tools and update bpf_helpers.h
  bpf: Sample NRM BPF program to limit egress bw
  bpf: User program for testing NRM
  bpf: NRM test script

 drivers/media/rc/bpf-lirc.c                 |   2 +-
 include/linux/bpf.h                         |   3 +-
 include/linux/filter.h                      |   3 +-
 include/uapi/linux/bpf.h                    |  27 +-
 kernel/bpf/cgroup.c                         |   2 +-
 kernel/bpf/syscall.c                        |  12 +
 kernel/bpf/verifier.c                       |   4 +
 kernel/trace/bpf_trace.c                    |  10 +-
 net/core/filter.c                           | 101 ++++-
 samples/bpf/Makefile                        |   5 +
 samples/bpf/do_nrm_test.sh                  | 437 +++++++++++++++++++
 samples/bpf/nrm.c                           | 440 ++++++++++++++++++++
 samples/bpf/nrm.h                           |  31 ++
 samples/bpf/nrm_kern.h                      | 137 ++++++
 samples/bpf/nrm_out_kern.c                  | 190 +++++++++
 tools/include/uapi/linux/bpf.h              |  27 +-
 tools/testing/selftests/bpf/bpf_helpers.h   |   6 +
 tools/testing/selftests/bpf/verifier/sock.c |  33 ++
 18 files changed, 1444 insertions(+), 26 deletions(-)
 create mode 100755 samples/bpf/do_nrm_test.sh
 create mode 100644 samples/bpf/nrm.c
 create mode 100644 samples/bpf/nrm.h
 create mode 100644 samples/bpf/nrm_kern.h
 create mode 100644 samples/bpf/nrm_out_kern.c

-- 
2.17.1