by Taeung Song

[permalink] [raw]

Subject: Re: [PATCH v3 1/4] perf config: Introduce perf_config_set class

On 03/29/2016 06:06 AM, Arnaldo Carvalho de Melo wrote:
> Em Thu, Mar 24, 2016 at 03:46:00PM +0900, Taeung Song escreveu:
>> Hi, Namhyung
>>
>> On 03/24/2016 03:07 PM, Namhyung Kim wrote:
>>> Hi Taeung,
>>>
>>> On Thu, Mar 24, 2016 at 05:16:30AM +0900, Taeung Song wrote:
>>>> 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: Jiri Olsa <[email protected]>
>>>> Signed-off-by: Taeung Song <[email protected]>
>>>
>>> Acked-by: Namhyung Kim <[email protected]>
>>>
>>
>> Thank you!!
>>
>> But I'm so sorry for my mistake.
>> I missed perf_config_set__delete() out when the error occur in
>> collect_config().
>>
>> (If returning -1 from collect_config(), perf process die with some error
>> message at once
>> so it is needed to call perf_config_set__delete() before that moment)
>>
>> So, I'll resend this patch after fixing it as below.
>
> Ok, when resubmitting, if no changes are made to a patch that got an
> Acked-by, please add that Acked-by line,
>
> Will wait for v4 then, thanks,
>

I got it.
I hastily resent this patch after modifying it..

I'll resend the v4 patchset that contains Acked-by.

Thanks,
Taeung

>
>> diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c
>> index 725015f..3831733 100644
>> --- a/tools/perf/util/config.c
>> +++ b/tools/perf/util/config.c
>> @@ -705,14 +706,15 @@ static int set_value(struct perf_config_item
>> *config_item, const char *value)
>> }
>>
>> static int collect_config(const char *var, const char *value,
>> - void *section_list)
>> + 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 list_head *sections = section_list;
>> + struct perf_config_set *perf_configs = perf_config_set;
>> + struct list_head *sections = &perf_configs->sections;
>>
>> key = ptr = strdup(var);
>> if (!key) {
>> @@ -743,7 +745,8 @@ static int collect_config(const char *var, const char
>> *value,
>>
>> out_free:
>> free(key);
>> - return ret;
>> + perf_config_set__delete(perf_configs);
>> + return -1;
>> }
>>
>> static struct perf_config_set *perf_config_set__init(struct perf_config_set
>> *perf_configs)
>> @@ -777,7 +780,7 @@ struct perf_config_set *perf_config_set__new(void)
>> return NULL;
>>
>> perf_config_set__init(perf_configs);
>> - perf_config(collect_config, &perf_configs->sections);
>> + perf_config(collect_config, perf_configs);
>>
>> return perf_configs;
>> }
>>
>>
>> Thanks,
>> Taeung
>>
>>>
>>>
>>>> ---
>>>> tools/perf/util/config.c | 169 +++++++++++++++++++++++++++++++++++++++++++++++
>>>> tools/perf/util/config.h | 26 ++++++++
>>>> 2 files changed, 195 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..3beeceb 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 +507,174 @@ 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, &section->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(&section->config_items);
>>>> + section->name = strdup(section_name);
>>>> + if (!section->name) {
>>>> + pr_err("%s: strdup failed\n", __func__);
>>>> + free(section);
>>>> + return NULL;
>>>> + }
>>>> +
>>>> + list_add_tail(&section->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, &section->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 *section_list)
>>>> +{
>>>> + int ret = -1;
>>>> + char *ptr, *key;
>>>> + char *section_name, *name;
>>>> + struct perf_config_section *section = NULL;
>>>> + struct perf_config_item *config_item = NULL;
>>>> + struct list_head *sections = section_list;
>>>> +
>>>> + 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, &section, &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);
>>>> + 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->sections);
>>>> + perf_config(collect_config, &perf_configs->sections);
>>>> +
>>>> + 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,
>>>> + &section->config_items, list) {
>>>> + list_del(&config_item->list);
>>>> + free(config_item->name);
>>>> + free(config_item->value);
>>>> + free(config_item);
>>>> + }
>>>> + list_del(&section->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 <stdbool.h>
>>>> +#include <linux/list.h>
>>>> +
>>>> +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
>>>>