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From:   Jiri Olsa <jolsa@kernel.org>
To:     Arnaldo Carvalho de Melo <acme@kernel.org>
Cc:     lkml <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Ingo Molnar <mingo@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Namhyung Kim <namhyung@kernel.org>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Michael Petlan <mpetlan@redhat.com>,
        Ian Rogers <irogers@google.com>,
        Stephane Eranian <eranian@google.com>,
        Alexei Budankov <abudankov@huawei.com>
Subject: [PATCH 02/22] perf tools: Add config set interface
Date:   Sat,  2 Jan 2021 23:04:21 +0100
Message-Id: <20210102220441.794923-3-jolsa@kernel.org>
In-Reply-To: <20210102220441.794923-1-jolsa@kernel.org>
References: <20210102220441.794923-1-jolsa@kernel.org>
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Add interface to load config set from custom file
by using perf_config_set__load_file function.

It will be used in perf daemon command to process
custom config file.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
 tools/perf/util/config.c | 28 +++++++++++++++++++++++-----
 tools/perf/util/config.h |  3 +++
 2 files changed, 26 insertions(+), 5 deletions(-)

diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index 20be0504fb95..222cb2e2de25 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -738,6 +738,18 @@ struct perf_config_set *perf_config_set__new(void)
 	return set;
 }
 
+struct perf_config_set *perf_config_set__load_file(const char *file)
+{
+	struct perf_config_set *set = zalloc(sizeof(*set));
+
+	if (set) {
+		INIT_LIST_HEAD(&set->sections);
+		perf_config_from_file(collect_config, file, set);
+	}
+
+	return set;
+}
+
 static int perf_config__init(void)
 {
 	if (config_set == NULL)
@@ -746,17 +758,15 @@ static int perf_config__init(void)
 	return config_set == NULL;
 }
 
-int perf_config(config_fn_t fn, void *data)
+int perf_config_set(struct perf_config_set *set,
+		    config_fn_t fn, void *data)
 {
 	int ret = 0;
 	char key[BUFSIZ];
 	struct perf_config_section *section;
 	struct perf_config_item *item;
 
-	if (config_set == NULL && perf_config__init())
-		return -1;
-
-	perf_config_set__for_each_entry(config_set, section, item) {
+	perf_config_set__for_each_entry(set, section, item) {
 		char *value = item->value;
 
 		if (value) {
@@ -778,6 +788,14 @@ int perf_config(config_fn_t fn, void *data)
 	return ret;
 }
 
+int perf_config(config_fn_t fn, void *data)
+{
+	if (config_set == NULL && perf_config__init())
+		return -1;
+
+	return perf_config_set(config_set, fn, data);
+}
+
 void perf_config__exit(void)
 {
 	perf_config_set__delete(config_set);
diff --git a/tools/perf/util/config.h b/tools/perf/util/config.h
index 2f753b2a034b..ee5a242446e9 100644
--- a/tools/perf/util/config.h
+++ b/tools/perf/util/config.h
@@ -29,6 +29,8 @@ typedef int (*config_fn_t)(const char *, const char *, void *);
 
 int perf_default_config(const char *, const char *, void *);
 int perf_config(config_fn_t fn, void *);
+int perf_config_set(struct perf_config_set *set,
+		    config_fn_t fn, void *data);
 int perf_config_int(int *dest, const char *, const char *);
 int perf_config_u8(u8 *dest, const char *name, const char *value);
 int perf_config_u64(u64 *dest, const char *, const char *);
@@ -37,6 +39,7 @@ int config_error_nonbool(const char *);
 const char *perf_etc_perfconfig(void);
 
 struct perf_config_set *perf_config_set__new(void);
+struct perf_config_set *perf_config_set__load_file(const char *file);
 void perf_config_set__delete(struct perf_config_set *set);
 int perf_config_set__collect(struct perf_config_set *set, const char *file_name,
 			     const char *var, const char *value);
-- 
2.26.2