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selftests/bpf: Fix overflow tests to reflect iter size increase

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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>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/1601292670-1616-7-git-send-email-alan.maguire@oracle.com
This commit is contained in:
Alan Maguire 2020-09-28 12:31:08 +01:00 committed by Alexei Starovoitov
parent af65320948
commit eb58bbf2e5
1 changed files with 7 additions and 7 deletions
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14
tools/testing/selftests/bpf/prog_tests/bpf_iter.c
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@ -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;