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Subject[PATCH v7 bpf-next 6/8] selftests/bpf: fix overflow tests to reflect iter size increase
Date
bpf iter size increase to PAGE_SIZE << 3 means overflow tests assuming
page size need to be bumped also.

Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
---
tools/testing/selftests/bpf/prog_tests/bpf_iter.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c
index fe1a83b9..ad9de13 100644
--- a/tools/testing/selftests/bpf/prog_tests/bpf_iter.c
+++ b/tools/testing/selftests/bpf/prog_tests/bpf_iter.c
@@ -352,7 +352,7 @@ static void test_overflow(bool test_e2big_overflow, bool ret1)
struct bpf_map_info map_info = {};
struct bpf_iter_test_kern4 *skel;
struct bpf_link *link;
- __u32 page_size;
+ __u32 iter_size;
char *buf;

skel = bpf_iter_test_kern4__open();
@@ -374,19 +374,19 @@ static void test_overflow(bool test_e2big_overflow, bool ret1)
"map_creation failed: %s\n", strerror(errno)))
goto free_map1;

- /* bpf_seq_printf kernel buffer is one page, so one map
+ /* bpf_seq_printf kernel buffer is 8 pages, so one map
* bpf_seq_write will mostly fill it, and the other map
* will partially fill and then trigger overflow and need
* bpf_seq_read restart.
*/
- page_size = sysconf(_SC_PAGE_SIZE);
+ iter_size = sysconf(_SC_PAGE_SIZE) << 3;

if (test_e2big_overflow) {
- skel->rodata->print_len = (page_size + 8) / 8;
- expected_read_len = 2 * (page_size + 8);
+ skel->rodata->print_len = (iter_size + 8) / 8;
+ expected_read_len = 2 * (iter_size + 8);
} else if (!ret1) {
- skel->rodata->print_len = (page_size - 8) / 8;
- expected_read_len = 2 * (page_size - 8);
+ skel->rodata->print_len = (iter_size - 8) / 8;
+ expected_read_len = 2 * (iter_size - 8);
} else {
skel->rodata->print_len = 1;
expected_read_len = 2 * 8;
--
1.8.3.1
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