Re: [PATCH 20/25] perf tools: Add is_perf_data function

Arnaldo Carvalho de Melo
2020-11-26T17:51:42Z

Em Thu, Nov 26, 2020 at 06:00:21PM +0100, Jiri Olsa escreveu:
> Adding is_perf_data function that returns true if
> the given path is perf data file. It will be used
> in following patches.

Thanks, applied.

- Arnaldo

> Acked-by: Ian Rogers <irogers@google.com>
> Signed-off-by: Jiri Olsa <jolsa@kernel.org>
> ---
> tools/perf/util/data.c | 19 +++++++++++++++++++
> tools/perf/util/data.h | 1 +
> 2 files changed, 20 insertions(+)
>
> diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
> index 05bbcb663c41..f29af4fc3d09 100644
> --- a/tools/perf/util/data.c
> +++ b/tools/perf/util/data.c
> @@ -492,3 +492,22 @@ char *perf_data__kallsyms_name(struct perf_data *data)
>
> return kallsyms_name;
> }
> +
> +bool is_perf_data(const char *path)
> +{
> + bool ret = false;
> + FILE *file;
> + u64 magic;
> +
> + file = fopen(path, "r");
> + if (!file)
> + return false;
> +
> + if (fread(&magic, 1, 8, file) < 8)
> + goto out;
> +
> + ret = is_perf_magic(magic);
> +out:
> + fclose(file);
> + return ret;
> +}
> diff --git a/tools/perf/util/data.h b/tools/perf/util/data.h
> index c563fcbb0288..62a3e66fbee8 100644
> --- a/tools/perf/util/data.h
> +++ b/tools/perf/util/data.h
> @@ -98,4 +98,5 @@ int perf_data__update_dir(struct perf_data *data);
> unsigned long perf_data__size(struct perf_data *data);
> int perf_data__make_kcore_dir(struct perf_data *data, char *buf, size_t buf_sz);
> char *perf_data__kallsyms_name(struct perf_data *data);
> +bool is_perf_data(const char *path);
> #endif /* __PERF_DATA_H */
> --
> 2.26.2
>

--

- Arnaldo