// 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, 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; }