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selftests/bpf: add selftest that use test_libbpf_open

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This script test_libbpf.sh will be part of the 'make run_tests'
invocation, but can also be invoked manually in this directory,
and a verbose mode can be enabled via setting the environment
variable $VERBOSE like:

 $ VERBOSE=yes ./test_libbpf.sh

The script contains some tests that are commented out, as they
currently fail.  They are reminders about what we need to improve
for the libbpf loader library.

Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Jesper Dangaard Brouer 2018-02-08 12:48:27 +01:00 committed by Daniel Borkmann
parent 864db336c6
commit f09b2e382e
2 changed files with 61 additions and 2 deletions
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14
tools/testing/selftests/bpf/Makefile
View File

@ -13,6 +13,7 @@ endif
CFLAGS += -Wall -O2 -I$(APIDIR) -I$(LIBDIR) -I$(GENDIR) $(GENFLAGS) -I../../../include
LDLIBS += -lcap -lelf -lrt -lpthread
# Order correspond to 'make run_tests' order
TEST_GEN_PROGS = test_verifier test_tag test_maps test_lru_map test_lpm_map test_progs \
test_align test_verifier_log test_dev_cgroup test_tcpbpf_user
@ -20,17 +21,26 @@ TEST_GEN_FILES = test_pkt_access.o test_xdp.o test_l4lb.o test_tcp_estats.o test
test_pkt_md_access.o test_xdp_redirect.o test_xdp_meta.o sockmap_parse_prog.o \
sockmap_verdict_prog.o dev_cgroup.o sample_ret0.o test_tracepoint.o \
test_l4lb_noinline.o test_xdp_noinline.o test_stacktrace_map.o \
sample_map_ret0.o test_tcpbpf_kern.o test_libbpf_open
sample_map_ret0.o test_tcpbpf_kern.o
TEST_PROGS := test_kmod.sh test_xdp_redirect.sh test_xdp_meta.sh \
# Order correspond to 'make run_tests' order
TEST_PROGS := test_kmod.sh \
test_libbpf.sh \
test_xdp_redirect.sh \
test_xdp_meta.sh \
test_offload.py
# Compile but not part of 'make run_tests'
TEST_GEN_PROGS_EXTENDED = test_libbpf_open
include ../lib.mk
BPFOBJ := $(OUTPUT)/libbpf.a cgroup_helpers.c
$(TEST_GEN_PROGS): $(BPFOBJ)
$(TEST_GEN_PROGS_EXTENDED): $(OUTPUT)/libbpf.a
.PHONY: force
# force a rebuild of BPFOBJ when its dependencies are updated

49
tools/testing/selftests/bpf/test_libbpf.sh Executable file
View File

@ -0,0 +1,49 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0
export TESTNAME=test_libbpf
# Determine selftest success via shell exit code
exit_handler()
{
if (( $? == 0 )); then
echo "selftests: $TESTNAME [PASS]";
else
echo "$TESTNAME: failed at file $LAST_LOADED" 1>&2
echo "selftests: $TESTNAME [FAILED]";
fi
}
libbpf_open_file()
{
LAST_LOADED=$1
if [ -n "$VERBOSE" ]; then
./test_libbpf_open $1
else
./test_libbpf_open --quiet $1
fi
}
# Exit script immediately (well catched by trap handler) if any
# program/thing exits with a non-zero status.
set -e
# (Use 'trap -l' to list meaning of numbers)
trap exit_handler 0 2 3 6 9
libbpf_open_file test_l4lb.o
# TODO: fix libbpf to load noinline functions
# [warning] libbpf: incorrect bpf_call opcode
#libbpf_open_file test_l4lb_noinline.o
# TODO: fix test_xdp_meta.c to load with libbpf
# [warning] libbpf: test_xdp_meta.o doesn't provide kernel version
#libbpf_open_file test_xdp_meta.o
# TODO: fix libbpf to handle .eh_frame
# [warning] libbpf: relocation failed: no section(10)
#libbpf_open_file ../../../../samples/bpf/tracex3_kern.o
# Success
exit 0