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5 Commits

Author SHA1 Message Date
Tao Chen
7eab3a58ac bpf/selftests: Check errno when percpu map value size exceeds 
This test case checks the errno message when percpu map value size
exceeds PCPU_MIN_UNIT_SIZE.

root@debian:~# ./test_maps
...
test_map_percpu_stats_hash_of_maps:PASS
test_map_percpu_stats_map_value_size:PASS
test_sk_storage_map:PASS

Signed-off-by: Jinke Han <jinkehan@didiglobal.com>
Signed-off-by: Tao Chen <chen.dylane@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20240910144111.1464912-3-chen.dylane@gmail.com
 2024-09-11 13:22:45 -07:00
Hou Tao
2f553b032c selftsets/bpf: Retry map update for non-preallocated per-cpu map 
BPF CI failed due to map_percpu_stats_percpu_hash from time to time [1].
It seems that the failure reason is per-cpu bpf memory allocator may not
be able to allocate per-cpu pointer successfully and it can not refill
free llist timely, and bpf_map_update_elem() will return -ENOMEM.

So mitigate the problem by retrying the update operation for
non-preallocated per-cpu map.

[1]: https://github.com/kernel-patches/bpf/actions/runs/6713177520/job/18244865326?pr=5909

Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20231101032455.3808547-4-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
 2023-11-09 18:58:40 -08:00
Hou Tao
d79924ca57 selftests/bpf: Use value with enough-size when updating per-cpu map 
When updating per-cpu map in map_percpu_stats test, patch_map_thread()
only passes 4-bytes-sized value to bpf_map_update_elem(). The expected
size of the value is 8 * num_possible_cpus(), so fix it by passing a
value with enough-size for per-cpu map update.

Signed-off-by: Hou Tao <houtao1@huawei.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20231101032455.3808547-2-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
 2023-11-09 18:58:40 -08:00
Andrii Nakryiko
9af3775962 selftests/bpf: fix test_maps' use of bpf_map_create_opts 
Use LIBBPF_OPTS() macro to properly initialize bpf_map_create_opts in
test_maps' tests.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20231029011509.2479232-1-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
 2023-11-01 22:42:38 -07:00
Anton Protopopov
6c1b8cb6a7 selftests/bpf: test map percpu stats 
Add a new map test, map_percpu_stats.c, which is checking the correctness of
map's percpu elements counters.  For supported maps the test upserts a number
of elements, checks the correctness of the counters, then deletes all the
elements and checks again that the counters sum drops down to zero.

The following map types are tested:

    * BPF_MAP_TYPE_HASH, BPF_F_NO_PREALLOC
    * BPF_MAP_TYPE_PERCPU_HASH, BPF_F_NO_PREALLOC
    * BPF_MAP_TYPE_HASH,
    * BPF_MAP_TYPE_PERCPU_HASH,
    * BPF_MAP_TYPE_LRU_HASH
    * BPF_MAP_TYPE_LRU_PERCPU_HASH
    * BPF_MAP_TYPE_LRU_HASH, BPF_F_NO_COMMON_LRU
    * BPF_MAP_TYPE_LRU_PERCPU_HASH, BPF_F_NO_COMMON_LRU
    * BPF_MAP_TYPE_HASH_OF_MAPS

Signed-off-by: Anton Protopopov <aspsk@isovalent.com>
Acked-by: Hou Tao <houtao1@huawei.com>
Link: https://lore.kernel.org/r/20230706133932.45883-6-aspsk@isovalent.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
 2023-07-06 12:42:25 -07:00