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perf tools: Remove bpf_program__set_priv/bpf_program__priv usage 

Both bpf_program__set_priv/bpf_program__priv are deprecated
and will be eventually removed.

Using 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>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20220224155238.714682-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2022-02-24 16:52:37 +01:00 committed by Arnaldo Carvalho de Melo
parent d57159efde
commit a3bfc0d76f
1 changed files with 83 additions and 17 deletions
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100
tools/perf/util/bpf-loader.c
View File

@ -26,6 +26,7 @@
#include "util.h"
#include "llvm-utils.h"
#include "c++/clang-c.h"
#include "hashmap.h"
#include <internal/xyarray.h>
@ -55,6 +56,7 @@ struct bpf_perf_object {
};
static LIST_HEAD(bpf_objects_list);
static struct hashmap *bpf_program_hash;
static struct bpf_perf_object *
bpf_perf_object__next(struct bpf_perf_object *prev)
@ -173,18 +175,8 @@ struct bpf_object *bpf__prepare_load(const char *filename, bool source)
return obj;
}
void bpf__clear(void)
{
struct bpf_perf_object *perf_obj, *tmp;
bpf_perf_object__for_each(perf_obj, tmp) {
bpf__unprobe(perf_obj->obj);
bpf_perf_object__close(perf_obj);
}
}
static void
clear_prog_priv(struct bpf_program *prog __maybe_unused,
clear_prog_priv(const struct bpf_program *prog __maybe_unused,
void *_priv)
{
struct bpf_prog_priv *priv = _priv;
@ -197,6 +189,80 @@ clear_prog_priv(struct bpf_program *prog __maybe_unused,
free(priv);
}
static void bpf_program_hash_free(void)
{
struct hashmap_entry *cur;
size_t bkt;
if (IS_ERR_OR_NULL(bpf_program_hash))
return;
hashmap__for_each_entry(bpf_program_hash, cur, bkt)
clear_prog_priv(cur->key, cur->value);
hashmap__free(bpf_program_hash);
bpf_program_hash = NULL;
}
void bpf__clear(void)
{
struct bpf_perf_object *perf_obj, *tmp;
bpf_perf_object__for_each(perf_obj, tmp) {
bpf__unprobe(perf_obj->obj);
bpf_perf_object__close(perf_obj);
}
bpf_program_hash_free();
}
static size_t ptr_hash(const void *__key, void *ctx __maybe_unused)
{
return (size_t) __key;
}
static bool ptr_equal(const void *key1, const void *key2,
void *ctx __maybe_unused)
{
return key1 == key2;
}
static void *program_priv(const struct bpf_program *prog)
{
void *priv;
if (IS_ERR_OR_NULL(bpf_program_hash))
return NULL;
if (!hashmap__find(bpf_program_hash, prog, &priv))
return NULL;
return priv;
}
static int program_set_priv(struct bpf_program *prog, void *priv)
{
void *old_priv;
/*
* Should not happen, we warn about it in the
* caller function - config_bpf_program
*/
if (IS_ERR(bpf_program_hash))
return PTR_ERR(bpf_program_hash);
if (!bpf_program_hash) {
bpf_program_hash = hashmap__new(ptr_hash, ptr_equal, NULL);
if (IS_ERR(bpf_program_hash))
return PTR_ERR(bpf_program_hash);
}
old_priv = program_priv(prog);
if (old_priv) {
clear_prog_priv(prog, old_priv);
return hashmap__set(bpf_program_hash, prog, priv, NULL, NULL);
}
return hashmap__add(bpf_program_hash, prog, priv);
}
static int
prog_config__exec(const char *value, struct perf_probe_event *pev)
{
@ -438,7 +504,7 @@ config_bpf_program(struct bpf_program *prog)
pr_debug("bpf: config '%s' is ok\n", config_str);
set_priv:
err = bpf_program__set_priv(prog, priv, clear_prog_priv);
err = program_set_priv(prog, priv);
if (err) {
pr_debug("Failed to set priv for program '%s'\n", config_str);
goto errout;
@ -479,7 +545,7 @@ preproc_gen_prologue(struct bpf_program *prog, int n,
struct bpf_insn *orig_insns, int orig_insns_cnt,
struct bpf_prog_prep_result *res)
{
struct bpf_prog_priv *priv = bpf_program__priv(prog);
struct bpf_prog_priv *priv = program_priv(prog);
struct probe_trace_event *tev;
struct perf_probe_event *pev;
struct bpf_insn *buf;
@ -630,7 +696,7 @@ static int map_prologue(struct perf_probe_event *pev, int *mapping,
static int hook_load_preprocessor(struct bpf_program *prog)
{
struct bpf_prog_priv *priv = bpf_program__priv(prog);
struct bpf_prog_priv *priv = program_priv(prog);
struct perf_probe_event *pev;
bool need_prologue = false;
int err, i;
@ -706,7 +772,7 @@ int bpf__probe(struct bpf_object *obj)
if (err)
goto out;
priv = bpf_program__priv(prog);
priv = program_priv(prog);
if (IS_ERR_OR_NULL(priv)) {
if (!priv)
err = -BPF_LOADER_ERRNO__INTERNAL;
@ -758,7 +824,7 @@ int bpf__unprobe(struct bpf_object *obj)
struct bpf_program *prog;
bpf_object__for_each_program(prog, obj) {
struct bpf_prog_priv *priv = bpf_program__priv(prog);
struct bpf_prog_priv *priv = program_priv(prog);
int i;
if (IS_ERR_OR_NULL(priv) || priv->is_tp)
@ -814,7 +880,7 @@ int bpf__foreach_event(struct bpf_object *obj,
int err;
bpf_object__for_each_program(prog, obj) {
struct bpf_prog_priv *priv = bpf_program__priv(prog);
struct bpf_prog_priv *priv = program_priv(prog);
struct probe_trace_event *tev;
struct perf_probe_event *pev;
int i, fd;