From f74599f7c5309b21151233b98139e9b723fd1110 Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Wed, 30 Nov 2016 17:10:11 +0100 Subject: bpf: Add tests and samples for LWT-BPF Adds a series of tests to verify the functionality of attaching BPF programs at LWT hooks. Also adds a sample which collects a histogram of packet sizes which pass through an LWT hook. $ ./lwt_len_hist.sh Starting netserver with host 'IN(6)ADDR_ANY' port '12865' and family AF_UNSPEC MIGRATED TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.253.2 () port 0 AF_INET : demo Recv Send Send Socket Socket Message Elapsed Size Size Size Time Throughput bytes bytes bytes secs. 10^6bits/sec 87380 16384 16384 10.00 39857.69 1 -> 1 : 0 | | 2 -> 3 : 0 | | 4 -> 7 : 0 | | 8 -> 15 : 0 | | 16 -> 31 : 0 | | 32 -> 63 : 22 | | 64 -> 127 : 98 | | 128 -> 255 : 213 | | 256 -> 511 : 1444251 |******** | 512 -> 1023 : 660610 |*** | 1024 -> 2047 : 535241 |** | 2048 -> 4095 : 19 | | 4096 -> 8191 : 180 | | 8192 -> 16383 : 5578023 |************************************* | 16384 -> 32767 : 632099 |*** | 32768 -> 65535 : 6575 | | Signed-off-by: Thomas Graf Acked-by: Alexei Starovoitov Signed-off-by: David S. Miller --- samples/bpf/Makefile | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'samples/bpf/Makefile') diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile index 3ceb5a9d86df..44532fbe4cae 100644 --- a/samples/bpf/Makefile +++ b/samples/bpf/Makefile @@ -29,6 +29,7 @@ hostprogs-y += test_current_task_under_cgroup hostprogs-y += trace_event hostprogs-y += sampleip hostprogs-y += tc_l2_redirect +hostprogs-y += lwt_len_hist test_lru_dist-objs := test_lru_dist.o libbpf.o sock_example-objs := sock_example.o libbpf.o @@ -59,6 +60,7 @@ test_current_task_under_cgroup-objs := bpf_load.o libbpf.o \ trace_event-objs := bpf_load.o libbpf.o trace_event_user.o sampleip-objs := bpf_load.o libbpf.o sampleip_user.o tc_l2_redirect-objs := bpf_load.o libbpf.o tc_l2_redirect_user.o +lwt_len_hist-objs := bpf_load.o libbpf.o lwt_len_hist_user.o # Tell kbuild to always build the programs always := $(hostprogs-y) @@ -89,6 +91,7 @@ always += xdp2_kern.o always += test_current_task_under_cgroup_kern.o always += trace_event_kern.o always += sampleip_kern.o +always += lwt_len_hist_kern.o HOSTCFLAGS += -I$(objtree)/usr/include HOSTCFLAGS += -I$(srctree)/tools/testing/selftests/bpf/ @@ -117,6 +120,7 @@ HOSTLOADLIBES_test_current_task_under_cgroup += -lelf HOSTLOADLIBES_trace_event += -lelf HOSTLOADLIBES_sampleip += -lelf HOSTLOADLIBES_tc_l2_redirect += -l elf +HOSTLOADLIBES_lwt_len_hist += -l elf # Allows pointing LLC/CLANG to a LLVM backend with bpf support, redefine on cmdline: # make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang -- cgit v1.2.3-55-g7522