Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932141AbcC2AnU (ORCPT ); Mon, 28 Mar 2016 20:43:20 -0400 Received: from mail-pf0-f196.google.com ([209.85.192.196]:33025 "EHLO mail-pf0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932111AbcC2AnT (ORCPT ); Mon, 28 Mar 2016 20:43:19 -0400 From: Taeung Song To: Arnaldo Carvalho de Melo , Namhyung Kim Cc: linux-kernel@vger.kernel.org, Jiri Olsa , Ingo Molnar , Peter Zijlstra , Taeung Song Subject: [PATCH v4 1/4] perf config: Introduce perf_config_set class Date: Tue, 29 Mar 2016 09:43:13 +0900 Message-Id: <1459212193-1095-1-git-send-email-treeze.taeung@gmail.com> X-Mailer: git-send-email 2.5.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5796 Lines: 240 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 Cc: Jiri Olsa Signed-off-by: Taeung Song --- tools/perf/util/config.c | 171 +++++++++++++++++++++++++++++++++++++++++++++++ tools/perf/util/config.h | 26 +++++++ 2 files changed, 197 insertions(+) create mode 100644 tools/perf/util/config.h diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c index 4e72763..2dbf47c 100644 --- a/tools/perf/util/config.c +++ b/tools/perf/util/config.c @@ -13,6 +13,7 @@ #include #include "util/hist.h" /* perf_hist_config */ #include "util/llvm-utils.h" /* perf_llvm_config */ +#include "config.h" #define MAXNAME (256) @@ -506,6 +507,176 @@ out: return ret; } +static struct perf_config_section *find_section(struct list_head *sections, + const char *section_name) +{ + struct perf_config_section *section; + + list_for_each_entry(section, sections, list) + if (!strcmp(section->name, section_name)) + return section; + + return NULL; +} + +static struct perf_config_item *find_config_item(const char *name, + struct perf_config_section *section) +{ + struct perf_config_item *config_item; + + list_for_each_entry(config_item, §ion->config_items, list) + if (!strcmp(config_item->name, name)) + return config_item; + + return NULL; +} + +static void find_config(struct list_head *sections, + struct perf_config_section **section, + struct perf_config_item **config_item, + const char *section_name, const char *name) +{ + *section = find_section(sections, section_name); + + if (*section != NULL) + *config_item = find_config_item(name, *section); + else + *config_item = NULL; +} + +static struct perf_config_section *add_section(struct list_head *sections, + const char *section_name) +{ + struct perf_config_section *section = zalloc(sizeof(*section)); + + if (!section) + return NULL; + + INIT_LIST_HEAD(§ion->config_items); + section->name = strdup(section_name); + if (!section->name) { + pr_err("%s: strdup failed\n", __func__); + free(section); + return NULL; + } + + list_add_tail(§ion->list, sections); + return section; +} + +static struct perf_config_item *add_config_item(struct perf_config_section *section, + const char *name) +{ + struct perf_config_item *config_item = zalloc(sizeof(*config_item)); + + if (!config_item) + return NULL; + + config_item->name = strdup(name); + if (!name) { + pr_err("%s: strdup failed\n", __func__); + goto out_err; + } + + list_add_tail(&config_item->list, §ion->config_items); + return config_item; + +out_err: + free(config_item); + return NULL; +} + +static int set_value(struct perf_config_item *config_item, const char *value) +{ + char *val = strdup(value); + + if (!val) + return -1; + + free(config_item->value); + config_item->value = val; + return 0; +} + +static int collect_config(const char *var, const char *value, + void *perf_config_set) +{ + int ret = -1; + char *ptr, *key; + char *section_name, *name; + struct perf_config_section *section = NULL; + struct perf_config_item *config_item = NULL; + struct perf_config_set *perf_configs = perf_config_set; + struct list_head *sections = &perf_configs->sections; + + key = ptr = strdup(var); + if (!key) { + pr_err("%s: strdup failed\n", __func__); + return -1; + } + + section_name = strsep(&ptr, "."); + name = ptr; + if (name == NULL || value == NULL) + goto out_free; + + find_config(sections, §ion, &config_item, section_name, name); + + if (!section) { + section = add_section(sections, section_name); + if (!section) + goto out_free; + } + if (!config_item) { + config_item = add_config_item(section, name); + if (!config_item) + goto out_free; + } + + ret = set_value(config_item, value); + return ret; + +out_free: + free(key); + perf_config_set__delete(perf_configs); + return -1; +} + +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->sections); + perf_config(collect_config, perf_configs); + + return perf_configs; +} + +void perf_config_set__delete(struct perf_config_set *perf_configs) +{ + struct perf_config_section *section, *section_tmp; + struct perf_config_item *config_item, *item_tmp; + + list_for_each_entry_safe(section, section_tmp, + &perf_configs->sections, list) { + list_for_each_entry_safe(config_item, item_tmp, + §ion->config_items, list) { + list_del(&config_item->list); + free(config_item->name); + free(config_item->value); + free(config_item); + } + list_del(§ion->list); + free(section->name); + free(section); + } + + 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..e270e51 --- /dev/null +++ b/tools/perf/util/config.h @@ -0,0 +1,26 @@ +#ifndef __PERF_CONFIG_H +#define __PERF_CONFIG_H + +#include +#include + +struct perf_config_item { + char *name; + char *value; + struct list_head list; +}; + +struct perf_config_section { + char *name; + struct list_head config_items; + struct list_head list; +}; + +struct perf_config_set { + struct list_head sections; +}; + +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