From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936692AbcIRPcy (ORCPT ); Sun, 18 Sep 2016 11:32:54 -0400 Received: from mail.kernel.org ([198.145.29.136]:37866 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936627AbcIRPcm (ORCPT ); Sun, 18 Sep 2016 11:32:42 -0400 From: Chao Yu To: jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Chao Yu Subject: [PATCH 5/6] f2fs: support IO error injection Date: Sun, 18 Sep 2016 23:30:07 +0800 Message-Id: <1474212608-6930-5-git-send-email-chao@kernel.org> X-Mailer: git-send-email 2.7.2 In-Reply-To: <1474212608-6930-1-git-send-email-chao@kernel.org> References: <1474212608-6930-1-git-send-email-chao@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Chao Yu This patch adds to support IO error injection for testing IO error tolerance of f2fs. Signed-off-by: Chao Yu --- fs/f2fs/data.c | 5 +++++ fs/f2fs/f2fs.h | 3 +++ fs/f2fs/super.c | 1 + 3 files changed, 9 insertions(+) diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 120a995..251cc33 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -34,6 +34,11 @@ static void f2fs_read_end_io(struct bio *bio) struct bio_vec *bvec; int i; +#ifdef CONFIG_F2FS_FAULT_INJECTION + if (time_to_inject(FAULT_IO)) + bio->bi_error = -EIO; +#endif + if (f2fs_bio_encrypted(bio)) { if (bio->bi_error) { fscrypt_release_ctx(bio->bi_private); diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index b615f3f..a1a68bf 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -46,6 +46,7 @@ enum { FAULT_BLOCK, FAULT_DIR_DEPTH, FAULT_EVICT_INODE, + FAULT_IO, FAULT_MAX, }; @@ -77,6 +78,8 @@ static inline bool time_to_inject(int type) return false; else if (type == FAULT_EVICT_INODE && !IS_FAULT_SET(type)) return false; + else if (type == FAULT_IO && !IS_FAULT_SET(type)) + return false; atomic_inc(&f2fs_fault.inject_ops); if (atomic_read(&f2fs_fault.inject_ops) >= f2fs_fault.inject_rate) { diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index f809729..fafa34e 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -50,6 +50,7 @@ char *fault_name[FAULT_MAX] = { [FAULT_BLOCK] = "no more block", [FAULT_DIR_DEPTH] = "too big dir depth", [FAULT_EVICT_INODE] = "evict_inode fail", + [FAULT_IO] = "IO error", }; static void f2fs_build_fault_attr(unsigned int rate) -- 2.7.2