From 382b55dbef6b68e3fef2fd8a438fbaff57695308 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Tue, 6 Nov 2018 15:46:27 -0300 Subject: [PATCH] perf bpf: Add defines for map insertion/lookup Starting with a helper for a basic pid_map(), a hash using a pid as a key. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: https://lkml.kernel.org/n/tip-gdwvq53wltvq6b3g5tdmh0cw@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/include/bpf/bpf.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/tools/perf/include/bpf/bpf.h b/tools/perf/include/bpf/bpf.h index 52b6d87fe822..04ecd425a237 100644 --- a/tools/perf/include/bpf/bpf.h +++ b/tools/perf/include/bpf/bpf.h @@ -18,6 +18,17 @@ struct bpf_map { unsigned int numa_node; }; +#define pid_map(name, value_type) \ +struct bpf_map SEC("maps") name = { \ + .type = BPF_MAP_TYPE_HASH, \ + .key_size = sizeof(pid_t), \ + .value_size = sizeof(value_type), \ + .max_entries = 512, \ +} + +static int (*bpf_map_update_elem)(struct bpf_map *map, void *key, void *value, u64 flags) = (void *)BPF_FUNC_map_update_elem; +static void *(*bpf_map_lookup_elem)(struct bpf_map *map, void *key) = (void *)BPF_FUNC_map_lookup_elem; + #define SEC(NAME) __attribute__((section(NAME), used)) #define probe(function, vars) \ -- 2.30.2