From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 23BDC43DA23 for ; Tue, 20 Jan 2026 14:09:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768918200; cv=none; b=eCuT/Gfueju/7QfwJ3lOLDm90YoHpZMmofoCVlLOaskrZiftgsHlxa/fR2fQ88mE/UZsmv07H6hmsNbw+aEKVvFZP1UeVutES/l5iiY/TzI2O1Je0n0WdjfgjhaVlcbrKd5tCBm+/e0Agiwdx+e0fwZd6IvIjoVcqjavqztPGzA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768918200; c=relaxed/simple; bh=V11yCnrXXgu8zsEksEHezAvtxS8/qxKhGJjPfRTOFM4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=o+FNc7x7ZT6lx9KVe4l0dL3bvtcO92vVoYSdO3nn1nH5UNhtei5zG7yj5cSqtFznzl8shm6Ry1elPMGf7ERwHeKW0fShwKm26/Z7Zt7qjumLm6MxQUCFQfe50NbOOR1+XGwfvJVb8+up8I7WWKpxc+DaR0daGDwY3UjEWM/AArM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=s73ezEPh; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="s73ezEPh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3D8A2C16AAE; Tue, 20 Jan 2026 14:09:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768918199; bh=V11yCnrXXgu8zsEksEHezAvtxS8/qxKhGJjPfRTOFM4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s73ezEPhJAdyh/rKAQDJgMD/2EhY+0Z3gMap2+l96wROJ8v34nAfDt4OzvdqW+nz1 SWor/cjT7kow5kkZJmZJBjumQBDyY14AqxenCP5mc5F3Bx8ktDIG2EN6Bitt8XC3Z+ 72Xcro7XBCL8erfnvZgCdqtzH5e1pw8SCNXXaYmQfZgU3TbGj+rvl6ona056TRRYMz ew+U14JWHmssoPcFhxj+1h7OlWnG07jQ1btjShAdJKxFIKSF0rwuQQz1eqNIbU3Uyo 8YaPrLmFrmSEC2dft0Te/0IvfKR+2y+GjN1Xah5FmSb1ywbbkByq8Pct5C1WE/hSdC ddLhuCR0olhAw== From: Chao Yu To: jaegeuk@kernel.org Cc: linux-f2fs-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, Chao Yu Subject: [PATCH v2 2/2] f2fs: introduce FAULT_SKIP_WRITE Date: Tue, 20 Jan 2026 17:12:15 +0800 Message-Id: <20260120091215.62608-2-chao@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20260120091215.62608-1-chao@kernel.org> References: <20260120091215.62608-1-chao@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit In order to simulate skipped write during enable_checkpoint(). Signed-off-by: Chao Yu --- v2: - no changes Documentation/ABI/testing/sysfs-fs-f2fs | 1 + Documentation/filesystems/f2fs.rst | 1 + fs/f2fs/data.c | 4 ++++ fs/f2fs/f2fs.h | 1 + fs/f2fs/super.c | 1 + 5 files changed, 8 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 7398b369784c..9a8ec2290f68 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -744,6 +744,7 @@ Description: Support configuring fault injection type, should be FAULT_ATOMIC_TIMEOUT 0x00400000 (1000ms) FAULT_VMALLOC 0x00800000 FAULT_LOCK_TIMEOUT 0x01000000 (1000ms) + FAULT_SKIP_WRITE 0x02000000 =========================== ========== What: /sys/fs/f2fs//discard_io_aware_gran diff --git a/Documentation/filesystems/f2fs.rst b/Documentation/filesystems/f2fs.rst index fc005f2eaf86..7e4031631286 100644 --- a/Documentation/filesystems/f2fs.rst +++ b/Documentation/filesystems/f2fs.rst @@ -218,6 +218,7 @@ fault_type=%d Support configuring fault injection type, should be FAULT_ATOMIC_TIMEOUT 0x00400000 (1000ms) FAULT_VMALLOC 0x00800000 FAULT_LOCK_TIMEOUT 0x01000000 (1000ms) + FAULT_SKIP_WRITE 0x02000000 =========================== ========== mode=%s Control block allocation mode which supports "adaptive" and "lfs". In "lfs" mode, there should be no random diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c index 25b4d3f21fa7..9ef875e7b34c 100644 --- a/fs/f2fs/data.c +++ b/fs/f2fs/data.c @@ -2921,6 +2921,10 @@ int f2fs_do_write_data_page(struct f2fs_io_info *fio) goto got_it; } + if (is_sbi_flag_set(fio->sbi, SBI_ENABLE_CHECKPOINT) && + time_to_inject(fio->sbi, FAULT_SKIP_WRITE)) + return -EINVAL; + /* Deadlock due to between page->lock and f2fs_lock_op */ if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi, &lc)) return -EAGAIN; diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index 52cec6b3ecf0..3a8e1dcdcd69 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -66,6 +66,7 @@ enum { FAULT_ATOMIC_TIMEOUT, FAULT_VMALLOC, FAULT_LOCK_TIMEOUT, + FAULT_SKIP_WRITE, FAULT_MAX, }; diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index 0afe9f829058..5d8b2e812340 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -70,6 +70,7 @@ const char *f2fs_fault_name[FAULT_MAX] = { [FAULT_ATOMIC_TIMEOUT] = "atomic timeout", [FAULT_VMALLOC] = "vmalloc", [FAULT_LOCK_TIMEOUT] = "lock timeout", + [FAULT_SKIP_WRITE] = "skip write", }; int f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned long rate, -- 2.40.1