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Message-Id: <1457957769-3700-2-git-send-email-treeze.taeung@gmail.com>
Date: Mon, 14 Mar 2016 21:16:05 +0900
From: Taeung Song <treeze.taeung@...il.com>
To: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Ingo Molnar <mingo@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Taeung Song <treeze.taeung@...il.com>
Subject: [PATCH v2 1/5] perf config: Introduce perf_config_set class
This infrastructure code was designed for
upcoming features of perf-config.
That collect config key-value pairs from user and
system config files (i.e. user wide ~/.perfconfig
and system wide $(sysconfdir)/perfconfig)
to manage perf's configs.
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Jiri Olsa <jolsa@...nel.org>
Signed-off-by: Taeung Song <treeze.taeung@...il.com>
---
tools/perf/builtin-config.c | 1 +
tools/perf/util/config.c | 123 ++++++++++++++++++++++++++++++++++++++++++++
tools/perf/util/config.h | 21 ++++++++
3 files changed, 145 insertions(+)
create mode 100644 tools/perf/util/config.h
diff --git a/tools/perf/builtin-config.c b/tools/perf/builtin-config.c
index c42448e..412c725 100644
--- a/tools/perf/builtin-config.c
+++ b/tools/perf/builtin-config.c
@@ -12,6 +12,7 @@
#include <subcmd/parse-options.h>
#include "util/util.h"
#include "util/debug.h"
+#include "util/config.h"
static bool use_system_config, use_user_config;
diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
index 4e72763..b9660e4 100644
--- a/tools/perf/util/config.c
+++ b/tools/perf/util/config.c
@@ -13,6 +13,7 @@
#include <subcmd/exec-cmd.h>
#include "util/hist.h" /* perf_hist_config */
#include "util/llvm-utils.h" /* perf_llvm_config */
+#include "config.h"
#define MAXNAME (256)
@@ -506,6 +507,128 @@ out:
return ret;
}
+static struct perf_config_item *find_config(struct list_head *config_list,
+ const char *section,
+ const char *name)
+{
+ struct perf_config_item *config;
+
+ list_for_each_entry(config, config_list, list) {
+ if (!strcmp(config->section, section) &&
+ !strcmp(config->name, name))
+ return config;
+ }
+
+ return NULL;
+}
+
+static struct perf_config_item *add_config(struct list_head *config_list,
+ const char *section,
+ const char *name)
+{
+ struct perf_config_item *config = zalloc(sizeof(*config));
+
+ if (!config)
+ return NULL;
+
+ config->section = strdup(section);
+ if (!section)
+ goto out_err;
+
+ config->name = strdup(name);
+ if (!name) {
+ free((char *)config->section);
+ goto out_err;
+ }
+
+ list_add_tail(&config->list, config_list);
+ return config;
+
+out_err:
+ free(config);
+ pr_err("%s: strdup failed\n", __func__);
+ return NULL;
+}
+
+static int set_value(struct perf_config_item *config, const char *value)
+{
+ char *val = strdup(value);
+
+ if (!val)
+ return -1;
+ config->value = val;
+
+ return 0;
+}
+
+static int collect_config(const char *var, const char *value,
+ void *configs)
+{
+ int ret = 0;
+ char *ptr, *key;
+ char *section, *name;
+ struct perf_config_item *config;
+ struct list_head *config_list = configs;
+
+ key = ptr = strdup(var);
+ if (!key) {
+ pr_err("%s: strdup failed\n", __func__);
+ return -1;
+ }
+
+ section = strsep(&ptr, ".");
+ name = ptr;
+ if (name == NULL || value == NULL) {
+ ret = -1;
+ goto out_free;
+ }
+
+ config = find_config(config_list, section, name);
+ if (!config) {
+ config = add_config(config_list, section, name);
+ if (!config) {
+ free(config->section);
+ free(config->name);
+ ret = -1;
+ goto out_free;
+ }
+ }
+
+ ret = set_value(config, value);
+
+out_free:
+ free(key);
+ return ret;
+}
+
+struct perf_config_set *perf_config_set__new(void)
+{
+ struct perf_config_set *perf_configs = zalloc(sizeof(*perf_configs));
+
+ if (!perf_configs)
+ return NULL;
+
+ INIT_LIST_HEAD(&perf_configs->config_list);
+ perf_config(collect_config, &perf_configs->config_list);
+
+ return perf_configs;
+}
+
+void perf_config_set__delete(struct perf_config_set *perf_configs)
+{
+ struct perf_config_item *pos, *item;
+
+ list_for_each_entry_safe(pos, item, &perf_configs->config_list, list) {
+ list_del(&pos->list);
+ free(pos->section);
+ free(pos->name);
+ free(pos->value);
+ free(pos);
+ }
+
+ free(perf_configs);
+}
+
/*
* Call this to report error for your variable that should not
* get a boolean value (i.e. "[my] var" means "true").
diff --git a/tools/perf/util/config.h b/tools/perf/util/config.h
new file mode 100644
index 0000000..44c226f
--- /dev/null
+++ b/tools/perf/util/config.h
@@ -0,0 +1,21 @@
+#ifndef __PERF_CONFIG_H
+#define __PERF_CONFIG_H
+
+#include <stdbool.h>
+#include <linux/list.h>
+
+struct perf_config_item {
+ char *section;
+ char *name;
+ char *value;
+ struct list_head list;
+};
+
+struct perf_config_set {
+ struct list_head config_list;
+};
+
+struct perf_config_set *perf_config_set__new(void);
+void perf_config_set__delete(struct perf_config_set *perf_configs);
+
+#endif /* __PERF_CONFIG_H */
--
2.5.0
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