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bpf/tests: Reduce memory footprint of test suite 

The test suite used to call any fill_helper callbacks to generate eBPF
program data for all test cases at once. This caused ballooning memory
requirements as more extensive test cases were added. Now the each
fill_helper is called before the test is run and the allocated memory
released afterwards, before the next test case is processed.

Signed-off-by: Johan Almbladh <johan.almbladh@anyfinetworks.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210914091842.4186267-3-johan.almbladh@anyfinetworks.com
This commit is contained in:
Johan Almbladh 2021-09-14 11:18:30 +02:00 committed by Daniel Borkmann
parent c2a228d69c
commit 4bc354138d
1 changed files with 12 additions and 14 deletions
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26
lib/test_bpf.c
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@ -8694,8 +8694,6 @@ static __init int find_test_index(const char *test_name)
static __init int prepare_bpf_tests(void)
{
int i;
if (test_id >= 0) {
/*
* if a test_id was specified, use test_range to
@ -8739,23 +8737,11 @@ static __init int prepare_bpf_tests(void)
}
}
for (i = 0; i < ARRAY_SIZE(tests); i++) {
if (tests[i].fill_helper &&
tests[i].fill_helper(&tests[i]) < 0)
return -ENOMEM;
}
return 0;
}
static __init void destroy_bpf_tests(void)
{
int i;
for (i = 0; i < ARRAY_SIZE(tests); i++) {
if (tests[i].fill_helper)
kfree(tests[i].u.ptr.insns);
}
}
static bool exclude_test(int test_id)
@ -8960,7 +8946,19 @@ static __init int test_bpf(void)
pr_info("#%d %s ", i, tests[i].descr);
if (tests[i].fill_helper &&
tests[i].fill_helper(&tests[i]) < 0) {
pr_cont("FAIL to prog_fill\n");
continue;
}
fp = generate_filter(i, &err);
if (tests[i].fill_helper) {
kfree(tests[i].u.ptr.insns);
tests[i].u.ptr.insns = NULL;
}
if (fp == NULL) {
if (err == 0) {
pass_cnt++;