libbpf: Selftests for resizing datasec maps
authorJP Kobryn <inwardvessel@gmail.com>
Wed, 24 May 2023 00:45:37 +0000 (17:45 -0700)
committerAndrii Nakryiko <andrii@kernel.org>
Wed, 24 May 2023 18:44:17 +0000 (11:44 -0700)
commit08b0895675736c49f7b172eac7d5c042fc71c3ec
tree3ac48fe645b27d5c1e8a42bf6881760d7f0d114c
parent9d0a23313b1aa107df857e8441ea2ed74811ea17
libbpf: Selftests for resizing datasec maps

This patch adds test coverage for resizing datasec maps. The first two
subtests resize the bss and custom data sections. In both cases, an
initial array (of length one) has its element set to one. After resizing
the rest of the array is filled with ones as well. A BPF program is then
run to sum the respective arrays and back on the userspace side the sum
is checked to be equal to the number of elements.
The third subtest attempts to perform resizing under conditions that
will result in either the resize failing or the BTF info being cleared.

Signed-off-by: JP Kobryn <inwardvessel@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/bpf/20230524004537.18614-3-inwardvessel@gmail.com
tools/testing/selftests/bpf/prog_tests/global_map_resize.c [new file with mode: 0644]
tools/testing/selftests/bpf/progs/test_global_map_resize.c [new file with mode: 0644]