diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_hash_large_key.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/test_hash_large_key.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_hash_large_key.c b/tools/testing/selftests/bpf/progs/test_hash_large_key.c new file mode 100644 index 000000000000..473a22794a62 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/test_hash_large_key.c @@ -0,0 +1,44 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <linux/bpf.h> +#include <bpf/bpf_helpers.h> + +char _license[] SEC("license") = "GPL"; + +struct { + __uint(type, BPF_MAP_TYPE_HASH); + __uint(max_entries, 2); + __type(key, struct bigelement); + __type(value, __u32); +} hash_map SEC(".maps"); + +struct { + __uint(type, BPF_MAP_TYPE_PERCPU_ARRAY); + __uint(max_entries, 1); + __type(key, __u32); + __type(value, struct bigelement); +} key_map SEC(".maps"); + +struct bigelement { + int a; + char b[4096]; + long long c; +}; + +SEC("raw_tracepoint/sys_enter") +int bpf_hash_large_key_test(void *ctx) +{ + int zero = 0, err = 1, value = 42; + struct bigelement *key; + + key = bpf_map_lookup_elem(&key_map, &zero); + if (!key) + return 0; + + key->c = 1; + if (bpf_map_update_elem(&hash_map, key, &value, BPF_ANY)) + return 0; + + return 0; +} + |