From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751612AbdGRE36 (ORCPT ); Tue, 18 Jul 2017 00:29:58 -0400 Received: from mail-pf0-f172.google.com ([209.85.192.172]:32780 "EHLO mail-pf0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751386AbdGRE0d (ORCPT ); Tue, 18 Jul 2017 00:26:33 -0400 From: David Carrillo-Cisneros To: linux-kernel@vger.kernel.org Cc: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Alexander Shishkin , David Ahern , Andi Kleen , Simon Que , Wang Nan , Jiri Olsa , He Kuang , Masami Hiramatsu , David Ahern , Namhyung Kim , Stephane Eranian , Paul Turner , David Carrillo-Cisneros Subject: [PATCH v6 03/16] perf header: fail on write_padded error Date: Mon, 17 Jul 2017 21:25:36 -0700 Message-Id: <20170718042549.145161-4-davidcc@google.com> X-Mailer: git-send-email 2.13.2.932.g7449e964c-goog In-Reply-To: <20170718042549.145161-1-davidcc@google.com> References: <20170718042549.145161-1-davidcc@google.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Do not proceed if write_padded error failed. Also, add comments to remind that the return value of write_* functions in util/header.c is an erro code and not the number of bytes written. Signed-off-by: David Carrillo-Cisneros --- tools/perf/util/header.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c index 3b833f06c4e7..8dda19b68ac4 100644 --- a/tools/perf/util/header.c +++ b/tools/perf/util/header.c @@ -74,6 +74,7 @@ bool perf_header__has_feat(const struct perf_header *header, int feat) return test_bit(feat, header->adds_features); } +/* Return: 0 if succeded, -ERR if failed. */ static int do_write(int fd, const void *buf, size_t size) { while (size) { @@ -89,6 +90,7 @@ static int do_write(int fd, const void *buf, size_t size) return 0; } +/* Return: 0 if succeded, -ERR if failed. */ int write_padded(int fd, const void *bf, size_t count, size_t count_aligned) { static const char zero_buf[NAME_ALIGN]; @@ -103,6 +105,7 @@ int write_padded(int fd, const void *bf, size_t count, size_t count_aligned) #define string_size(str) \ (PERF_ALIGN((strlen(str) + 1), NAME_ALIGN) + sizeof(u32)) +/* Return: 0 if succeded, -ERR if failed. */ static int do_write_string(int fd, const char *str) { u32 len, olen; @@ -3200,7 +3203,8 @@ int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, */ tracing_data_put(tdata); - write_padded(fd, NULL, 0, padding); + if (write_padded(fd, NULL, 0, padding)) + return -1; return aligned_size; } -- 2.13.2.932.g7449e964c-goog