perf bpf-filter: Pass 'target' to perf_bpf_filter__prepare()

This is needed to prepare target-specific actions in the later patch.
We want to reuse the pinned BPF program and map for regular users to
profile their own processes.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <song@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20240703223035.2024586-3-namhyung@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-record.c

@@ -1389,7 +1389,7 @@ static int record__open(struct record *rec)
 "even with a suitable vmlinux or kallsyms file.\n\n");
 	}
 
-	if (evlist__apply_filters(evlist, &pos)) {
+	if (evlist__apply_filters(evlist, &pos, &opts->target)) {
 		pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
 			pos->filter ?: "BPF", evsel__name(pos), errno,
 			str_error_r(errno, msg, sizeof(msg)));

tools/perf/builtin-stat.c

@@ -833,7 +833,7 @@ static int __run_perf_stat(int argc, const char **argv, int run_idx)
 			return -1;
 	}
 
-	if (evlist__apply_filters(evsel_list, &counter)) {
+	if (evlist__apply_filters(evsel_list, &counter, &target)) {
 		pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
 			counter->filter, evsel__name(counter), errno,
 			str_error_r(errno, msg, sizeof(msg)));

tools/perf/builtin-top.c

@@ -1055,7 +1055,7 @@ static int perf_top__start_counters(struct perf_top *top)
 		}
 	}
 
-	if (evlist__apply_filters(evlist, &counter)) {
+	if (evlist__apply_filters(evlist, &counter, &opts->target)) {
 		pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
 			counter->filter ?: "BPF", evsel__name(counter), errno,
 			str_error_r(errno, msg, sizeof(msg)));

tools/perf/builtin-trace.c

@@ -4135,7 +4135,7 @@ static int trace__run(struct trace *trace, int argc, const char **argv)
 	err = trace__expand_filters(trace, &evsel);
 	if (err)
 		goto out_delete_evlist;
-	err = evlist__apply_filters(evlist, &evsel);
+	err = evlist__apply_filters(evlist, &evsel, &trace->opts.target);
 	if (err < 0)
 		goto out_error_apply_filters;
 

tools/perf/util/bpf-filter.c

@@ -91,7 +91,7 @@ static int check_sample_flags(struct evsel *evsel, struct perf_bpf_filter_expr *
 	return -1;
 }
 
-int perf_bpf_filter__prepare(struct evsel *evsel)
+int perf_bpf_filter__prepare(struct evsel *evsel, struct target *target __maybe_unused)
 {
 	int i, x, y, fd, ret;
 	struct sample_filter_bpf *skel;

tools/perf/util/bpf-filter.h

@@ -16,6 +16,7 @@ struct perf_bpf_filter_expr {
 };
 
 struct evsel;
+struct target;
 
 #ifdef HAVE_BPF_SKEL
 struct perf_bpf_filter_expr *perf_bpf_filter_expr__new(enum perf_bpf_filter_term term,
@@ -23,7 +24,7 @@ struct perf_bpf_filter_expr *perf_bpf_filter_expr__new(enum perf_bpf_filter_term
 						       enum perf_bpf_filter_op op,
 						       unsigned long val);
 int perf_bpf_filter__parse(struct list_head *expr_head, const char *str);
-int perf_bpf_filter__prepare(struct evsel *evsel);
+int perf_bpf_filter__prepare(struct evsel *evsel, struct target *target);
 int perf_bpf_filter__destroy(struct evsel *evsel);
 u64 perf_bpf_filter__lost_count(struct evsel *evsel);
 
@@ -34,7 +35,8 @@ static inline int perf_bpf_filter__parse(struct list_head *expr_head __maybe_unu
 {
 	return -EOPNOTSUPP;
 }
-static inline int perf_bpf_filter__prepare(struct evsel *evsel __maybe_unused)
+static inline int perf_bpf_filter__prepare(struct evsel *evsel __maybe_unused,
+					   struct target *target __maybe_unused)
 {
 	return -EOPNOTSUPP;
 }

tools/perf/util/evlist.c

@@ -1086,7 +1086,8 @@ int evlist__create_maps(struct evlist *evlist, struct target *target)
 	return -1;
 }
 
-int evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel)
+int evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel,
+			  struct target *target)
 {
 	struct evsel *evsel;
 	int err = 0;
@@ -1108,7 +1109,7 @@ int evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel)
 		 * non-tracepoint events can have BPF filters.
 		 */
 		if (!list_empty(&evsel->bpf_filters)) {
-			err = perf_bpf_filter__prepare(evsel);
+			err = perf_bpf_filter__prepare(evsel, target);
 			if (err) {
 				*err_evsel = evsel;
 				break;

tools/perf/util/evlist.h

@@ -20,6 +20,7 @@ struct pollfd;
 struct thread_map;
 struct perf_cpu_map;
 struct record_opts;
+struct target;
 
 /*
  * State machine of bkw_mmap_state:
@@ -212,7 +213,8 @@ void evlist__enable_non_dummy(struct evlist *evlist);
 void evlist__set_selected(struct evlist *evlist, struct evsel *evsel);
 
 int evlist__create_maps(struct evlist *evlist, struct target *target);
-int evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel);
+int evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel,
+			  struct target *target);
 
 u64 __evlist__combined_sample_type(struct evlist *evlist);
 u64 evlist__combined_sample_type(struct evlist *evlist);