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Roman Gushchin 371e4fcc9d selftests/bpf: cgroup local storage-based network counters 
This commit adds a bpf kselftest, which demonstrates how percpu
and shared cgroup local storage can be used for efficient lookup-free
network accounting.

Cgroup local storage provides generic memory area with a very efficient
lookup free access. To avoid expensive atomic operations for each
packet, per-cpu cgroup local storage is used. Each packet is initially
charged to a per-cpu counter, and only if the counter reaches certain
value (32 in this case), the charge is moved into the global atomic
counter. This allows to amortize atomic operations, keeping reasonable
accuracy.

The test also implements a naive network traffic throttling, mostly to
demonstrate the possibility of bpf cgroup--based network bandwidth
control.

Expected output:
  ./test_netcnt
  test_netcnt:PASS

Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Song Liu <songliubraving@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
2018-10-01 16:18:33 +02:00
..
gnu selftests/bpf: get rid of -D__x86_64__ 2017-05-03 09:51:25 -04:00
include/uapi/linux License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
.gitignore selftests/bpf: test bpf flow dissection 2018-09-14 12:04:33 -07:00
bpf_endian.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
bpf_flow.c selftests/bpf: fix bpf_flow.c build 2018-09-14 12:09:05 -07:00
bpf_helpers.h selftests/bpf: Add cgroup id helpers to bpf_helpers.h 2018-08-13 01:02:39 +02:00
bpf_rand.h bpf: add ld64 imm test cases 2018-05-14 19:11:45 -07:00
bpf_rlimit.h bpf: unify rlimit handling in selftests 2018-02-26 20:11:23 -08:00
bpf_util.h bpf: Refactor ARRAY_SIZE macro to bpf_util.h 2018-08-11 01:58:46 +02:00
cgroup_helpers.c selftests/bpf: Fix const'ness in cgroup_helpers 2018-07-15 00:08:41 +02:00
cgroup_helpers.h selftests/bpf: Fix const'ness in cgroup_helpers 2018-07-15 00:08:41 +02:00
config selftests/bpf: test bpf flow dissection 2018-09-14 12:04:33 -07:00
connect4_prog.c selftests/bpf: Selftest for sys_connect hooks 2018-03-31 02:16:14 +02:00
connect6_prog.c selftests/bpf: Selftest for sys_connect hooks 2018-03-31 02:16:14 +02:00
dev_cgroup.c selftests/bpf: add a test for device cgroup controller 2017-11-05 23:26:51 +09:00
flow_dissector_load.c selftests/bpf: test bpf flow dissection 2018-09-14 12:04:33 -07:00
get_cgroup_id_kern.c tools/bpf: fix selftest get_cgroup_id_user 2018-06-08 00:10:07 +02:00
get_cgroup_id_user.c tools/bpf: fix selftest get_cgroup_id_user 2018-06-08 00:10:07 +02:00
Makefile selftests/bpf: cgroup local storage-based network counters 2018-10-01 16:18:33 +02:00
netcnt_common.h selftests/bpf: cgroup local storage-based network counters 2018-10-01 16:18:33 +02:00
netcnt_prog.c selftests/bpf: cgroup local storage-based network counters 2018-10-01 16:18:33 +02:00
sample_map_ret0.c selftest/bpf: extend the offload test with map checks 2018-01-18 22:54:26 +01:00
sample_ret0.c selftests/bpf: add offload test based on netdevsim 2017-12-03 00:27:58 +01:00
sendmsg4_prog.c selftests/bpf: Selftest for sys_sendmsg hooks 2018-05-28 17:41:05 +02:00
sendmsg6_prog.c selftests/bpf: Selftest for sys_sendmsg hooks 2018-05-28 17:41:05 +02:00
socket_cookie_prog.c selftests/bpf: Test for get_socket_cookie 2018-07-31 09:33:48 +02:00
sockmap_parse_prog.c bpf: add map tests for BPF_PROG_TYPE_SK_MSG 2018-03-19 21:14:39 +01:00
sockmap_tcp_msg_prog.c bpf: add map tests for BPF_PROG_TYPE_SK_MSG 2018-03-19 21:14:39 +01:00
sockmap_verdict_prog.c bpf: add map tests for BPF_PROG_TYPE_SK_MSG 2018-03-19 21:14:39 +01:00
tcp_client.py bpf: Add Python 3 support to selftests scripts for bpf 2018-07-25 07:46:48 +02:00
tcp_server.py bpf: Add Python 3 support to selftests scripts for bpf 2018-07-25 07:46:48 +02:00
test_adjust_tail.c bpf: adding tests for bpf_xdp_adjust_tail 2018-04-18 23:34:17 +02:00
test_align.c bpf: Refactor ARRAY_SIZE macro to bpf_util.h 2018-08-11 01:58:46 +02:00
test_btf.c tools/bpf: add bpffs percpu map pretty print tests in test_btf 2018-08-30 14:03:53 +02:00
test_btf_haskv.c bpf: Introduce BPF_ANNOTATE_KV_PAIR 2018-07-25 06:57:55 +02:00
test_btf_nokv.c bpf: btf: Add BTF tests 2018-04-19 21:47:42 +02:00
test_cgroup_storage.c selftests/bpf: extend the storage test to test per-cpu cgroup storage 2018-10-01 16:18:33 +02:00
test_dev_cgroup.c bpf: unify rlimit handling in selftests 2018-02-26 20:11:23 -08:00
test_flow_dissector.c selftests/bpf: test bpf flow dissection 2018-09-14 12:04:33 -07:00
test_flow_dissector.sh selftests/bpf: test bpf flow dissection 2018-09-14 12:04:33 -07:00
test_get_stack_rawtp.c tools/bpf: add a test for bpf_get_stack with raw tracepoint prog 2018-04-29 08:45:54 -07:00
test_iptunnel_common.h selftests/bpf: add a test for basic XDP functionality 2017-04-01 12:45:57 -07:00
test_kmod.sh selftests: bpf: notification about privilege required to run test_kmod.sh testing script 2018-06-22 00:30:02 +02:00
test_l4lb.c bpf: Move endianness BPF helpers out of bpf_util.h 2017-05-01 12:43:49 -07:00
test_l4lb_noinline.c selftests/bpf: add bpf_call test 2017-12-17 20:34:36 +01:00
test_libbpf.sh selftests/bpf: add selftest that use test_libbpf_open 2018-02-09 00:25:12 +01:00
test_libbpf_open.c selftests/bpf: add test program for loading BPF ELF files 2018-02-09 00:24:38 +01:00
test_lirc_mode2.sh selftests: bpf: notification about privilege required to run test_lirc_mode2.sh testing script 2018-06-26 12:15:28 +02:00
test_lirc_mode2_kern.c bpf: add selftest for lirc_mode2 type program 2018-05-30 12:40:14 +02:00
test_lirc_mode2_user.c bpf: add selftest for lirc_mode2 type program 2018-05-30 12:40:14 +02:00
test_lpm_map.c bpf: unify rlimit handling in selftests 2018-02-26 20:11:23 -08:00
test_lru_map.c bpf: unify rlimit handling in selftests 2018-02-26 20:11:23 -08:00
test_lwt_seg6local.c selftests/bpf: test for seg6local End.BPF action 2018-05-24 11:57:36 +02:00
test_lwt_seg6local.sh selftests/bpf: update test_lwt_seg6local.sh according to iproute2 2018-08-03 10:19:33 +02:00
test_maps.c bpf: test_maps, only support ESTABLISHED socks 2018-09-22 02:46:42 +02:00
test_netcnt.c selftests/bpf: cgroup local storage-based network counters 2018-10-01 16:18:33 +02:00
test_obj_id.c bpf: Fix test_obj_id.c for llvm 5.0 2017-06-09 15:15:11 -04:00
test_offload.py selftests/bpf: add test for sharing objects between netdevs 2018-07-18 15:10:34 +02:00
test_pkt_access.c selftests/bpf: fix broken build due to types.h 2017-05-17 18:45:14 -04:00
test_pkt_md_access.c bpf: fix selftest/bpf/test_pkt_md_access on s390x 2017-08-07 10:06:27 -07:00
test_progs.c selftests/bpf/test_progs: do not check errno == 0 2018-09-06 22:34:08 -07:00
test_section_names.c selftests/bpf: Test libbpf_{prog,attach}_type_by_name 2018-09-27 21:14:59 +02:00
test_select_reuseport.c bpf: Test BPF_PROG_TYPE_SK_REUSEPORT 2018-08-11 01:58:46 +02:00
test_select_reuseport_common.h bpf: Test BPF_PROG_TYPE_SK_REUSEPORT 2018-08-11 01:58:46 +02:00
test_select_reuseport_kern.c bpf: Test BPF_PROG_TYPE_SK_REUSEPORT 2018-08-11 01:58:46 +02:00
test_skb_cgroup_id.sh selftests/bpf: Selftest for bpf_skb_ancestor_cgroup_id 2018-08-13 01:02:40 +02:00
test_skb_cgroup_id_kern.c selftests/bpf: Selftest for bpf_skb_ancestor_cgroup_id 2018-08-13 01:02:40 +02:00
test_skb_cgroup_id_user.c selftests/bpf: Selftest for bpf_skb_ancestor_cgroup_id 2018-08-13 01:02:40 +02:00
test_sock.c bpf: Refactor ARRAY_SIZE macro to bpf_util.h 2018-08-11 01:58:46 +02:00
test_sock_addr.c bpf: Refactor ARRAY_SIZE macro to bpf_util.h 2018-08-11 01:58:46 +02:00
test_sock_addr.sh tools/bpf: fix test_sock and test_sock_addr.sh failure 2018-04-19 00:16:37 +02:00
test_socket_cookie.c selftests/bpf: Use libbpf_attach_type_by_name in test_socket_cookie 2018-09-27 21:14:59 +02:00
test_sockhash_kern.c bpf: selftest additions for SOCKHASH 2018-05-16 22:00:12 +02:00
test_sockmap.c bpf: use --cgroup in test_suite if supplied 2018-08-29 17:29:55 +02:00
test_sockmap_kern.c bpf: selftest additions for SOCKHASH 2018-05-16 22:00:12 +02:00
test_sockmap_kern.h bpf: selftest additions for SOCKHASH 2018-05-16 22:00:12 +02:00
test_stacktrace_build_id.c tools/bpf: add a test for bpf_get_stack with tracepoint prog 2018-04-29 08:45:54 -07:00
test_stacktrace_map.c tools/bpf: add a test for bpf_get_stack with tracepoint prog 2018-04-29 08:45:54 -07:00
test_tag.c bpf: unify rlimit handling in selftests 2018-02-26 20:11:23 -08:00
test_tcp_estats.c selftests/bpf: add a test case to check verifier pointer arithmetic 2017-05-03 09:51:25 -04:00
test_tcpbpf.h selftests/bpf: Test case for BPF_SOCK_OPS_TCP_LISTEN_CB 2018-07-15 00:08:41 +02:00
test_tcpbpf_kern.c bpf: add selftest for bpf's (set|get)_sockopt for SAVE_SYN 2018-09-01 01:37:00 +02:00
test_tcpbpf_user.c bpf: add selftest for bpf's (set|get)_sockopt for SAVE_SYN 2018-09-01 01:37:00 +02:00
test_tracepoint.c bpf/tracing: add a bpf test for new ioctl query interface 2017-12-12 08:46:40 -08:00
test_tunnel.sh bpf, selftests: delete xfrm tunnel when test exits. 2018-06-15 03:31:52 +02:00
test_tunnel_kern.c selftests/bpf: bpf tunnel test. 2018-04-27 00:11:14 +02:00
test_verifier.c selftests/bpf: add verifier per-cpu cgroup storage tests 2018-10-01 16:18:33 +02:00
test_verifier_log.c bpf: unify rlimit handling in selftests 2018-02-26 20:11:23 -08:00
test_xdp.c selftests: bpf: Use bpf_endian.h in test_xdp.c 2017-05-02 07:52:01 -07:00
test_xdp_meta.c bpf: improve selftests and add tests for meta pointer 2017-09-26 13:36:44 -07:00
test_xdp_meta.sh tools/bpf: fix batch-mode test failure of test_xdp_redirect.sh 2018-02-06 11:34:42 +01:00
test_xdp_noinline.c selftests/bpf: add xdp noinline test 2017-12-17 20:34:36 +01:00
test_xdp_redirect.c selftests: bpf: add a test for XDP redirect 2017-08-08 18:12:50 -07:00
test_xdp_redirect.sh tools/bpf: fix batch-mode test failure of test_xdp_redirect.sh 2018-02-06 11:34:42 +01:00
trace_helpers.c trace_helpers.c: Add helpers to poll multiple perf FDs for events 2018-06-27 11:01:03 +02:00
trace_helpers.h trace_helpers.c: Add helpers to poll multiple perf FDs for events 2018-06-27 11:01:03 +02:00
urandom_read.c bpf: add selftest for stackmap with build_id in NMI context 2018-05-14 23:29:45 +02:00
with_addr.sh selftests/bpf: test bpf flow dissection 2018-09-14 12:04:33 -07:00
with_tunnels.sh selftests/bpf: test bpf flow dissection 2018-09-14 12:04:33 -07:00