diff options
author | Jiri Olsa <jolsa@kernel.org> | 2022-02-24 18:52:38 +0300 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2022-03-05 22:11:51 +0300 |
commit | 4cee08fbd2cb160efb57f87a1e622c5248a2c22e (patch) | |
tree | 4570370673e3a0975839b928572ab2b704eae7c7 /tools/perf/util | |
parent | a3bfc0d76f63dbe406bb64e5ea14e217f97b2b24 (diff) | |
download | linux-4cee08fbd2cb160efb57f87a1e622c5248a2c22e.tar.xz |
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.
Use hashmap to replace that functionality.
Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Link: https://lore.kernel.org/r/20220224155238.714682-3-jolsa@kernel.org
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ian Rogers <irogers@google.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: bpf@vger.kernel.org
Cc: lkml <linux-kernel@vger.kernel.org>
Cc: linux-perf-users@vger.kernel.org
Diffstat (limited to 'tools/perf/util')
-rw-r--r-- | tools/perf/util/bpf-loader.c | 66 |
1 files changed, 59 insertions, 7 deletions
diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c index b9d4278895ec..4f6173756a9d 100644 --- a/tools/perf/util/bpf-loader.c +++ b/tools/perf/util/bpf-loader.c @@ -27,6 +27,7 @@ #include "llvm-utils.h" #include "c++/clang-c.h" #include "hashmap.h" +#include "asm/bug.h" #include <internal/xyarray.h> @@ -57,6 +58,7 @@ 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 +206,8 @@ 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 +218,7 @@ void bpf__clear(void) } bpf_program_hash_free(); + bpf_map_hash_free(); } static size_t ptr_hash(const void *__key, void *ctx __maybe_unused) @@ -976,7 +981,7 @@ 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; @@ -985,6 +990,53 @@ bpf_map_priv__clear(struct bpf_map *map __maybe_unused, free(priv); } +static void *map_priv(const struct bpf_map *map) +{ + void *priv; + + if (IS_ERR_OR_NULL(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 (IS_ERR_OR_NULL(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 (WARN_ON_ONCE(IS_ERR(bpf_map_hash))) + return PTR_ERR(bpf_program_hash); + + if (!bpf_map_hash) { + bpf_map_hash = hashmap__new(ptr_hash, ptr_equal, NULL); + if (IS_ERR(bpf_map_hash)) + return PTR_ERR(bpf_map_hash); + } + + 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) { @@ -1084,7 +1136,7 @@ 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); @@ -1099,7 +1151,7 @@ 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; } @@ -1440,7 +1492,7 @@ 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); @@ -1660,7 +1712,7 @@ 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); @@ -1696,7 +1748,7 @@ 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); @@ -1708,7 +1760,7 @@ 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); |