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Message-ID: References: <20251014080323.1660391-1-higuoxing@gmail.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20251014080323.1660391-1-higuoxing@gmail.com> On Tue, Oct 14, 2025 at 04:03:23PM +0800, Xing Guo wrote: > Recently, I noticed a selftest failure in my local environment. The > test_parse_test_list_file writes some data to > /tmp/bpf_arg_parsing_test.XXXXXX and parse_test_list_file() will read > the data back. However, after writing data to that file, we forget to > call fsync() and it's causing testing failure in my laptop. This patch > helps fix it by adding the missing fsync() call. > > Signed-off-by: Xing Guo > --- > tools/testing/selftests/bpf/prog_tests/arg_parsing.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/tools/testing/selftests/bpf/prog_tests/arg_parsing.c b/tools/testing/selftests/bpf/prog_tests/arg_parsing.c > index bb143de68875..4f071943ffb0 100644 > --- a/tools/testing/selftests/bpf/prog_tests/arg_parsing.c > +++ b/tools/testing/selftests/bpf/prog_tests/arg_parsing.c > @@ -140,6 +140,7 @@ static void test_parse_test_list_file(void) > fprintf(fp, "testA/subtest2\n"); > fprintf(fp, "testC_no_eof_newline"); > fflush(fp); > + fsync(fd); could we just close the fp stream instead flushing it twice? maybe something like below, but not sure ferror will work after the fclose call jirka --- diff --git a/tools/testing/selftests/bpf/prog_tests/arg_parsing.c b/tools/testing/selftests/bpf/prog_tests/arg_parsing.c index bb143de68875..5a4c1bca2a1e 100644 --- a/tools/testing/selftests/bpf/prog_tests/arg_parsing.c +++ b/tools/testing/selftests/bpf/prog_tests/arg_parsing.c @@ -139,10 +139,10 @@ static void test_parse_test_list_file(void) fprintf(fp, "testA/subtest # subtest duplicate\n"); fprintf(fp, "testA/subtest2\n"); fprintf(fp, "testC_no_eof_newline"); - fflush(fp); + fclose(fp); if (!ASSERT_OK(ferror(fp), "prepare tmp")) - goto out_fclose; + goto out_remove; init_test_filter_set(&set); @@ -160,8 +160,6 @@ static void test_parse_test_list_file(void) free_test_filter_set(&set); -out_fclose: - fclose(fp); out_remove: remove(tmpfile); }