diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs/bpf_iter_bpf_array_map.c')
-rw-r--r-- | tools/testing/selftests/bpf/progs/bpf_iter_bpf_array_map.c | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_bpf_array_map.c b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_array_map.c new file mode 100644 index 000000000000..c5969ca6f26b --- /dev/null +++ b/tools/testing/selftests/bpf/progs/bpf_iter_bpf_array_map.c @@ -0,0 +1,59 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2020 Facebook */ +#include "bpf_iter.h" +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_tracing.h> + +char _license[] SEC("license") = "GPL"; + +struct key_t { + int a; + int b; + int c; +}; + +struct { + __uint(type, BPF_MAP_TYPE_ARRAY); + __uint(max_entries, 3); + __type(key, __u32); + __type(value, __u64); +} arraymap1 SEC(".maps"); + +struct { + __uint(type, BPF_MAP_TYPE_HASH); + __uint(max_entries, 10); + __type(key, __u64); + __type(value, __u32); +} hashmap1 SEC(".maps"); + +__u32 key_sum = 0; +__u64 val_sum = 0; + +SEC("iter/bpf_map_elem") +int dump_bpf_array_map(struct bpf_iter__bpf_map_elem *ctx) +{ + __u32 *hmap_val, *key = ctx->key; + __u64 *val = ctx->value; + + if (key == (void *)0 || val == (void *)0) + return 0; + + bpf_seq_write(ctx->meta->seq, key, sizeof(__u32)); + bpf_seq_write(ctx->meta->seq, val, sizeof(__u64)); + key_sum += *key; + val_sum += *val; + + /* workaround - It's necessary to do this convoluted (val, key) + * write into hashmap1, instead of simply doing + * bpf_map_update_elem(&hashmap1, val, key, BPF_ANY); + * because key has MEM_RDONLY flag and bpf_map_update elem expects + * types without this flag + */ + bpf_map_update_elem(&hashmap1, val, val, BPF_ANY); + hmap_val = bpf_map_lookup_elem(&hashmap1, val); + if (hmap_val) + *hmap_val = *key; + + *val = *key; + return 0; +} |