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Date: Thu, 17 Feb 2022 14:19:15 +0100
From: Jiri Olsa <jolsa@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Andrii Nakryiko <andrii@...nel.org>,
lkml <linux-kernel@...r.kernel.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Ingo Molnar <mingo@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Namhyung Kim <namhyung@...nel.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Ian Rogers <irogers@...gle.com>,
linux-perf-users@...r.kernel.org, bpf@...r.kernel.org
Subject: [PATCH 2/3] perf tools: Remove bpf_map__set_priv/bpf_map__priv usage
Both bpf_map__set_priv/bpf_map__priv are deprecated
and will be eventually removed.
Using hashmap to replace that functionality.
Suggested-by: Andrii Nakryiko <andrii@...nel.org>
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
tools/perf/util/bpf-loader.c | 62 ++++++++++++++++++++++++++++++++----
1 file changed, 55 insertions(+), 7 deletions(-)
diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
index ec27aab2bd36..6f87729817ad 100644
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -57,6 +57,7 @@ struct bpf_perf_object {
static LIST_HEAD(bpf_objects_list);
static struct hashmap *bpf_program_hash;
+static struct hashmap *bpf_map_hash;
static struct bpf_perf_object *
bpf_perf_object__next(struct bpf_perf_object *prev)
@@ -204,6 +205,8 @@ static void bpf_program_hash_free(void)
bpf_program_hash = NULL;
}
+static void bpf_map_hash_free(void);
+
void bpf__clear(void)
{
struct bpf_perf_object *perf_obj, *tmp;
@@ -214,6 +217,7 @@ void bpf__clear(void)
}
bpf_program_hash_free();
+ bpf_map_hash_free();
}
static size_t ptr_hash(const void *__key, void *ctx __maybe_unused)
@@ -969,7 +973,7 @@ bpf_map_priv__purge(struct bpf_map_priv *priv)
}
static void
-bpf_map_priv__clear(struct bpf_map *map __maybe_unused,
+bpf_map_priv__clear(const struct bpf_map *map __maybe_unused,
void *_priv)
{
struct bpf_map_priv *priv = _priv;
@@ -978,6 +982,50 @@ bpf_map_priv__clear(struct bpf_map *map __maybe_unused,
free(priv);
}
+static void *map_priv(const struct bpf_map *map)
+{
+ void *priv;
+
+ if (!bpf_map_hash)
+ return NULL;
+ if (!hashmap__find(bpf_map_hash, map, &priv))
+ return NULL;
+ return priv;
+}
+
+static void bpf_map_hash_free(void)
+{
+ struct hashmap_entry *cur;
+ size_t bkt;
+
+ if (!bpf_map_hash)
+ return;
+
+ hashmap__for_each_entry(bpf_map_hash, cur, bkt)
+ bpf_map_priv__clear(cur->key, cur->value);
+
+ hashmap__free(bpf_map_hash);
+ bpf_map_hash = NULL;
+}
+
+static int map_set_priv(struct bpf_map *map, void *priv)
+{
+ void *old_priv;
+
+ if (!bpf_map_hash) {
+ bpf_map_hash = hashmap__new(ptr_hash, ptr_equal, NULL);
+ if (!bpf_map_hash)
+ return -ENOMEM;
+ }
+
+ old_priv = map_priv(map);
+ if (old_priv) {
+ bpf_map_priv__clear(map, old_priv);
+ return hashmap__set(bpf_map_hash, map, priv, NULL, NULL);
+ }
+ return hashmap__add(bpf_map_hash, map, priv);
+}
+
static int
bpf_map_op_setkey(struct bpf_map_op *op, struct parse_events_term *term)
{
@@ -1077,7 +1125,7 @@ static int
bpf_map__add_op(struct bpf_map *map, struct bpf_map_op *op)
{
const char *map_name = bpf_map__name(map);
- struct bpf_map_priv *priv = bpf_map__priv(map);
+ struct bpf_map_priv *priv = map_priv(map);
if (IS_ERR(priv)) {
pr_debug("Failed to get private from map %s\n", map_name);
@@ -1092,7 +1140,7 @@ bpf_map__add_op(struct bpf_map *map, struct bpf_map_op *op)
}
INIT_LIST_HEAD(&priv->ops_list);
- if (bpf_map__set_priv(map, priv, bpf_map_priv__clear)) {
+ if (map_set_priv(map, priv)) {
free(priv);
return -BPF_LOADER_ERRNO__INTERNAL;
}
@@ -1432,7 +1480,7 @@ bpf_map_config_foreach_key(struct bpf_map *map,
struct bpf_map_op *op;
const struct bpf_map_def *def;
const char *name = bpf_map__name(map);
- struct bpf_map_priv *priv = bpf_map__priv(map);
+ struct bpf_map_priv *priv = map_priv(map);
if (IS_ERR(priv)) {
pr_debug("ERROR: failed to get private from map %s\n", name);
@@ -1652,7 +1700,7 @@ struct evsel *bpf__setup_output_event(struct evlist *evlist, const char *name)
bool need_init = false;
bpf__perf_for_each_map_named(map, perf_obj, tmp, name) {
- struct bpf_map_priv *priv = bpf_map__priv(map);
+ struct bpf_map_priv *priv = map_priv(map);
if (IS_ERR(priv))
return ERR_PTR(-BPF_LOADER_ERRNO__INTERNAL);
@@ -1688,7 +1736,7 @@ struct evsel *bpf__setup_output_event(struct evlist *evlist, const char *name)
}
bpf__perf_for_each_map_named(map, perf_obj, tmp, name) {
- struct bpf_map_priv *priv = bpf_map__priv(map);
+ struct bpf_map_priv *priv = map_priv(map);
if (IS_ERR(priv))
return ERR_PTR(-BPF_LOADER_ERRNO__INTERNAL);
@@ -1700,7 +1748,7 @@ struct evsel *bpf__setup_output_event(struct evlist *evlist, const char *name)
if (!priv)
return ERR_PTR(-ENOMEM);
- err = bpf_map__set_priv(map, priv, bpf_map_priv__clear);
+ err = map_set_priv(map, priv);
if (err) {
bpf_map_priv__clear(map, priv);
return ERR_PTR(err);
--
2.35.1
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