From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from 004.mia.mailroute.net (004.mia.mailroute.net [199.89.3.7]) (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 782CB1A314E; Thu, 17 Jul 2025 20:59:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=199.89.3.7 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752785970; cv=none; b=U+jXQ5Ybzq+FaaXr3igjexJ+SAVyISswmgvocDqASqElc4l97cIYph5iL2+If2nBZcVvhaqHfSTec7Vi+A3gNslVz4s9rKEsA7+FQBkaODxp8DaSKJ1FPC/lJi9t5l8RO1IBYH2I+m7FmuSd5Vt371Oe+kbXBIjm2lkFMALLi6I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752785970; c=relaxed/simple; bh=/WqKhfmIGtCkS8uoqLL5vf/fe0UBNH9msWfjHaaNm1Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hNdUlg0wqRk16hfiPribTE8FoBTpk4DlGtQQSa//vdMMstJIQKqVRUGCsnJMQBmxEWvaK6i17HdyzhkZ+SFizEAUjexwEieogAmDNJ/ybJKoN+5T3l6KaTzqtzucpz2n7TNRAiOPs0ymKRbGFMezUHwMG7S98SUR6ace2lENaws= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org; spf=pass smtp.mailfrom=acm.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b=itxpuk7c; arc=none smtp.client-ip=199.89.3.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=acm.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=acm.org header.i=@acm.org header.b="itxpuk7c" Received: from localhost (localhost [127.0.0.1]) by 004.mia.mailroute.net (Postfix) with ESMTP id 4bjlfR4dPgzm0yVk; Thu, 17 Jul 2025 20:59:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=acm.org; h= content-transfer-encoding:mime-version:references:in-reply-to :x-mailer:message-id:date:date:subject:subject:from:from :received:received; s=mr01; t=1752785965; x=1755377966; bh=CwSAr lJZLw30AmVjBNEsetvx1z2SlVli8EnrNwnINpA=; b=itxpuk7cgzmlWEz5T45Ij b8nPVPOGUEtjCckJXafJi24oElj+QFPUp5OGSF/fj0BW4vLylYi8O4nMc6OLBDke m75PP8BzZLmFS0amuodfBikgepMnKGJHwtGr3quORd6+mEBbkX4C26Xix+wKTZfj R190JXkNNjjWzPFkpg2Q9GXzGR1FQ8XJCyArIfS38swQusvvv8y0ThriDw4JtGr3 kcUmFSA0Q0lO/rXmzCJEDkB5V+1cRWmeHV187rkoJ1KhVOJbeZtu16XgdooK10Tl 3fTCHe/hUrmvmkTM5cC1gt2zo5KGCjW+3o7R44FvndPEZwZSES2Zqa/c+jSA6Wk+ w== X-Virus-Scanned: by MailRoute Received: from 004.mia.mailroute.net ([127.0.0.1]) by localhost (004.mia [127.0.0.1]) (mroute_mailscanner, port 10029) with LMTP id Kh1ww1_0qkFv; Thu, 17 Jul 2025 20:59:25 +0000 (UTC) Received: from bvanassche.mtv.corp.google.com (unknown [104.135.204.82]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: bvanassche@acm.org) by 004.mia.mailroute.net (Postfix) with ESMTPSA id 4bjlfJ1fh7zm1742; Thu, 17 Jul 2025 20:59:19 +0000 (UTC) From: Bart Van Assche To: Jens Axboe Cc: linux-block@vger.kernel.org, linux-scsi@vger.kernel.org, Christoph Hellwig , Damien Le Moal , Bart Van Assche , Douglas Gilbert , "Martin K. Petersen" , Ming Lei Subject: [PATCH v21 11/12] scsi: scsi_debug: Support injecting unaligned write errors Date: Thu, 17 Jul 2025 13:58:07 -0700 Message-ID: <20250717205808.3292926-12-bvanassche@acm.org> X-Mailer: git-send-email 2.50.0.727.gbf7dc18ff4-goog In-Reply-To: <20250717205808.3292926-1-bvanassche@acm.org> References: <20250717205808.3292926-1-bvanassche@acm.org> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Allow user space software, e.g. a blktests test, to inject unaligned write errors. Acked-by: Douglas Gilbert Reviewed-by: Damien Le Moal Cc: Martin K. Petersen Cc: Christoph Hellwig Cc: Ming Lei Signed-off-by: Bart Van Assche --- drivers/scsi/scsi_debug.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index e970407cc7c4..959d0dc850a9 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -230,6 +230,7 @@ struct tape_block { #define SDEBUG_OPT_NO_CDB_NOISE 0x4000 #define SDEBUG_OPT_HOST_BUSY 0x8000 #define SDEBUG_OPT_CMD_ABORT 0x10000 +#define SDEBUG_OPT_UNALIGNED_WRITE 0x20000 #define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \ SDEBUG_OPT_RESET_NOISE) #define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \ @@ -237,7 +238,8 @@ struct tape_block { SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \ SDEBUG_OPT_SHORT_TRANSFER | \ SDEBUG_OPT_HOST_BUSY | \ - SDEBUG_OPT_CMD_ABORT) + SDEBUG_OPT_CMD_ABORT | \ + SDEBUG_OPT_UNALIGNED_WRITE) #define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \ SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR) =20 @@ -4915,6 +4917,14 @@ static int resp_write_dt0(struct scsi_cmnd *scp, s= truct sdebug_dev_info *devip) u8 *cmd =3D scp->cmnd; bool meta_data_locked =3D false; =20 + if (unlikely(sdebug_opts & SDEBUG_OPT_UNALIGNED_WRITE && + atomic_read(&sdeb_inject_pending))) { + atomic_set(&sdeb_inject_pending, 0); + mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, + UNALIGNED_WRITE_ASCQ); + return check_condition_result; + } + switch (cmd[0]) { case WRITE_16: ei_lba =3D 0;