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SubjectRe: [PATCH core v2] perf data: Adding error message if perf_data__create_dir fails
On Tue, Feb 22, 2022 at 12:14:17PM +0300, Alexey Bayduraev wrote:
> Adding proper return codes for all cases of data directory creation
> failure and adding error message output based on these codes.
>
> Signed-off-by: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>

Acked-by: Jiri Olsa <jolsa@kernel.org>

thanks,
jirka

> ---
> tools/perf/builtin-record.c | 4 +++-
> tools/perf/util/data.c | 8 ++++++--
> 2 files changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
> index 0bc6529814b2..0b4abed555d8 100644
> --- a/tools/perf/builtin-record.c
> +++ b/tools/perf/builtin-record.c
> @@ -1186,8 +1186,10 @@ static int record__mmap_evlist(struct record *rec,
>
> if (record__threads_enabled(rec)) {
> ret = perf_data__create_dir(&rec->data, evlist->core.nr_mmaps);
> - if (ret)
> + if (ret) {
> + pr_err("Failed to create data directory: %s\n", strerror(-ret));
> return ret;
> + }
> for (i = 0; i < evlist->core.nr_mmaps; i++) {
> if (evlist->mmap)
> evlist->mmap[i].file = &rec->data.dir.files[i];
> diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c
> index f5d260b1df4d..dc5d82ea1c30 100644
> --- a/tools/perf/util/data.c
> +++ b/tools/perf/util/data.c
> @@ -52,12 +52,16 @@ int perf_data__create_dir(struct perf_data *data, int nr)
> struct perf_data_file *file = &files[i];
>
> ret = asprintf(&file->path, "%s/data.%d", data->path, i);
> - if (ret < 0)
> + if (ret < 0) {
> + ret = -ENOMEM;
> goto out_err;
> + }
>
> ret = open(file->path, O_RDWR|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR);
> - if (ret < 0)
> + if (ret < 0) {
> + ret = -errno;
> goto out_err;
> + }
>
> file->fd = ret;
> }
> --
> 2.19.0
>

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