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Message-ID: <20251001181229.1010340-1-irogers@google.com>
Date: Wed, 1 Oct 2025 11:12:27 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>,
Ian Rogers <irogers@...gle.com>, Adrian Hunter <adrian.hunter@...el.com>,
Tengda Wu <wutengda@...weicloud.com>, Gabriele Monaco <gmonaco@...hat.com>,
James Clark <james.clark@...aro.org>, Howard Chu <howardchu95@...il.com>,
Athira Rajeev <atrajeev@...ux.vnet.ibm.com>, Song Liu <songliubraving@...com>,
linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
bpf@...r.kernel.org
Subject: [PATCH v1 1/2] perf bpf_counter: Move header declarations into C code
Reduce the API surface that is in bpf_counter.h, this helps compiler
analysis like unused static function, makes it easier to set a
breakpoint and just makes it easier to see the code is self
contained. When code is shared between BPF C code, put it inside
HAVE_BPF_SKEL. Move transitively found #includes into appropriate C
files.
No functional change.
Signed-off-by: Ian Rogers <irogers@...gle.com>
---
tools/perf/util/bpf_counter.c | 62 ++++++++++++++++++++++-
tools/perf/util/bpf_counter.h | 74 +++-------------------------
tools/perf/util/bpf_counter_cgroup.c | 1 +
tools/perf/util/bpf_ftrace.c | 1 +
tools/perf/util/bpf_off_cpu.c | 1 +
5 files changed, 69 insertions(+), 70 deletions(-)
diff --git a/tools/perf/util/bpf_counter.c b/tools/perf/util/bpf_counter.c
index 73fcafbffc6a..1c6cb5ea077e 100644
--- a/tools/perf/util/bpf_counter.c
+++ b/tools/perf/util/bpf_counter.c
@@ -6,10 +6,14 @@
#include <limits.h>
#include <unistd.h>
#include <sys/file.h>
+#include <sys/resource.h>
#include <sys/time.h>
#include <linux/err.h>
+#include <linux/list.h>
#include <linux/zalloc.h>
#include <api/fs/fs.h>
+#include <bpf/bpf.h>
+#include <bpf/btf.h>
#include <perf/bpf_perf.h>
#include "bpf_counter.h"
@@ -28,13 +32,67 @@
#include "bpf_skel/bperf_leader.skel.h"
#include "bpf_skel/bperf_follower.skel.h"
+struct bpf_counter {
+ void *skel;
+ struct list_head list;
+};
+
#define ATTR_MAP_SIZE 16
-static inline void *u64_to_ptr(__u64 ptr)
+static void *u64_to_ptr(__u64 ptr)
{
return (void *)(unsigned long)ptr;
}
+
+void set_max_rlimit(void)
+{
+ struct rlimit rinf = { RLIM_INFINITY, RLIM_INFINITY };
+
+ setrlimit(RLIMIT_MEMLOCK, &rinf);
+}
+
+static __u32 bpf_link_get_id(int fd)
+{
+ struct bpf_link_info link_info = { .id = 0, };
+ __u32 link_info_len = sizeof(link_info);
+
+ bpf_obj_get_info_by_fd(fd, &link_info, &link_info_len);
+ return link_info.id;
+}
+
+static __u32 bpf_link_get_prog_id(int fd)
+{
+ struct bpf_link_info link_info = { .id = 0, };
+ __u32 link_info_len = sizeof(link_info);
+
+ bpf_obj_get_info_by_fd(fd, &link_info, &link_info_len);
+ return link_info.prog_id;
+}
+
+static __u32 bpf_map_get_id(int fd)
+{
+ struct bpf_map_info map_info = { .id = 0, };
+ __u32 map_info_len = sizeof(map_info);
+
+ bpf_obj_get_info_by_fd(fd, &map_info, &map_info_len);
+ return map_info.id;
+}
+
+/* trigger the leader program on a cpu */
+int bperf_trigger_reading(int prog_fd, int cpu)
+{
+ DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts,
+ .ctx_in = NULL,
+ .ctx_size_in = 0,
+ .flags = BPF_F_TEST_RUN_ON_CPU,
+ .cpu = cpu,
+ .retval = 0,
+ );
+
+ return bpf_prog_test_run_opts(prog_fd, &opts);
+}
+
static struct bpf_counter *bpf_counter_alloc(void)
{
struct bpf_counter *counter;
@@ -785,7 +843,7 @@ struct bpf_counter_ops bperf_ops = {
extern struct bpf_counter_ops bperf_cgrp_ops;
-static inline bool bpf_counter_skip(struct evsel *evsel)
+static bool bpf_counter_skip(struct evsel *evsel)
{
return evsel->bpf_counter_ops == NULL;
}
diff --git a/tools/perf/util/bpf_counter.h b/tools/perf/util/bpf_counter.h
index c6d21c07b14c..658d8e7d507e 100644
--- a/tools/perf/util/bpf_counter.h
+++ b/tools/perf/util/bpf_counter.h
@@ -2,18 +2,10 @@
#ifndef __PERF_BPF_COUNTER_H
#define __PERF_BPF_COUNTER_H 1
-#include <linux/list.h>
-#include <sys/resource.h>
-
-#ifdef HAVE_LIBBPF_SUPPORT
-#include <bpf/bpf.h>
-#include <bpf/btf.h>
-#include <bpf/libbpf.h>
-#endif
-
struct evsel;
struct target;
-struct bpf_counter;
+
+#ifdef HAVE_BPF_SKEL
typedef int (*bpf_counter_evsel_op)(struct evsel *evsel);
typedef int (*bpf_counter_evsel_target_op)(struct evsel *evsel,
@@ -22,6 +14,7 @@ typedef int (*bpf_counter_evsel_install_pe_op)(struct evsel *evsel,
int cpu_map_idx,
int fd);
+/* Shared ops between bpf_counter, bpf_counter_cgroup, etc. */
struct bpf_counter_ops {
bpf_counter_evsel_target_op load;
bpf_counter_evsel_op enable;
@@ -31,13 +24,6 @@ struct bpf_counter_ops {
bpf_counter_evsel_install_pe_op install_pe;
};
-struct bpf_counter {
- void *skel;
- struct list_head list;
-};
-
-#ifdef HAVE_BPF_SKEL
-
int bpf_counter__load(struct evsel *evsel, struct target *target);
int bpf_counter__enable(struct evsel *evsel);
int bpf_counter__disable(struct evsel *evsel);
@@ -45,6 +31,9 @@ int bpf_counter__read(struct evsel *evsel);
void bpf_counter__destroy(struct evsel *evsel);
int bpf_counter__install_pe(struct evsel *evsel, int cpu_map_idx, int fd);
+int bperf_trigger_reading(int prog_fd, int cpu);
+void set_max_rlimit(void);
+
#else /* HAVE_BPF_SKEL */
#include <linux/err.h>
@@ -83,55 +72,4 @@ static inline int bpf_counter__install_pe(struct evsel *evsel __maybe_unused,
#endif /* HAVE_BPF_SKEL */
-static inline void set_max_rlimit(void)
-{
- struct rlimit rinf = { RLIM_INFINITY, RLIM_INFINITY };
-
- setrlimit(RLIMIT_MEMLOCK, &rinf);
-}
-
-#ifdef HAVE_BPF_SKEL
-
-static inline __u32 bpf_link_get_id(int fd)
-{
- struct bpf_link_info link_info = { .id = 0, };
- __u32 link_info_len = sizeof(link_info);
-
- bpf_obj_get_info_by_fd(fd, &link_info, &link_info_len);
- return link_info.id;
-}
-
-static inline __u32 bpf_link_get_prog_id(int fd)
-{
- struct bpf_link_info link_info = { .id = 0, };
- __u32 link_info_len = sizeof(link_info);
-
- bpf_obj_get_info_by_fd(fd, &link_info, &link_info_len);
- return link_info.prog_id;
-}
-
-static inline __u32 bpf_map_get_id(int fd)
-{
- struct bpf_map_info map_info = { .id = 0, };
- __u32 map_info_len = sizeof(map_info);
-
- bpf_obj_get_info_by_fd(fd, &map_info, &map_info_len);
- return map_info.id;
-}
-
-/* trigger the leader program on a cpu */
-static inline int bperf_trigger_reading(int prog_fd, int cpu)
-{
- DECLARE_LIBBPF_OPTS(bpf_test_run_opts, opts,
- .ctx_in = NULL,
- .ctx_size_in = 0,
- .flags = BPF_F_TEST_RUN_ON_CPU,
- .cpu = cpu,
- .retval = 0,
- );
-
- return bpf_prog_test_run_opts(prog_fd, &opts);
-}
-#endif /* HAVE_BPF_SKEL */
-
#endif /* __PERF_BPF_COUNTER_H */
diff --git a/tools/perf/util/bpf_counter_cgroup.c b/tools/perf/util/bpf_counter_cgroup.c
index 6ff42619de12..ed6a29b106b4 100644
--- a/tools/perf/util/bpf_counter_cgroup.c
+++ b/tools/perf/util/bpf_counter_cgroup.c
@@ -13,6 +13,7 @@
#include <linux/zalloc.h>
#include <linux/perf_event.h>
#include <api/fs/fs.h>
+#include <bpf/bpf.h>
#include <perf/bpf_perf.h>
#include "affinity.h"
diff --git a/tools/perf/util/bpf_ftrace.c b/tools/perf/util/bpf_ftrace.c
index 0cb02412043c..e61a3b20be0a 100644
--- a/tools/perf/util/bpf_ftrace.c
+++ b/tools/perf/util/bpf_ftrace.c
@@ -3,6 +3,7 @@
#include <stdint.h>
#include <stdlib.h>
+#include <bpf/bpf.h>
#include <linux/err.h>
#include "util/ftrace.h"
diff --git a/tools/perf/util/bpf_off_cpu.c b/tools/perf/util/bpf_off_cpu.c
index c367fefe6ecb..88e0660c4bff 100644
--- a/tools/perf/util/bpf_off_cpu.c
+++ b/tools/perf/util/bpf_off_cpu.c
@@ -13,6 +13,7 @@
#include "util/cgroup.h"
#include "util/strlist.h"
#include <bpf/bpf.h>
+#include <bpf/btf.h>
#include <internal/xyarray.h>
#include <linux/time64.h>
--
2.51.0.618.g983fd99d29-goog
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