Em Sat, Dec 12, 2020 at 11:43:53AM +0100, Jiri Olsa escreveu:
> Add interface to load config set from custom file
> by using perf_config_set__new_file function.
>
> It will be used in perf daemon command to process
> custom config file.
The naming may be misleading, as this is not _setting_ the perf config
to be that one, but to apply a set of changes to whatever is the current
configuration, right?
Perhaps 'perf_config_set__load_file()'
There is value in _resetting_ the config to some configuration, i.e.
moving everything to the strict defaults and then loading a file that
sets the configuration to a state similar to what perf does when it
first starts.
- Arnaldo
> Signed-off-by: Jiri Olsa <jo...@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 6969f82843ee..dc3f03f8bbf5 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__new_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 8c881e3a3ec3..f58b457e7e5f 100644
> --- a/tools/perf/util/config.h
> +++ b/tools/perf/util/config.h
> @@ -30,6 +30,8 @@ typedef int (*config_fn_t)(const char *, const char *, void
> *);
> int perf_config_from_file(config_fn_t fn, const char *filename, void *data);
> 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 *);
> @@ -38,6 +40,7 @@ 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__new_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
>
--
- Arnaldo
