From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.4 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BFC3DC636C9 for ; Thu, 15 Jul 2021 19:29:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AC2BB6141D for ; Thu, 15 Jul 2021 19:29:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343873AbhGOTby (ORCPT ); Thu, 15 Jul 2021 15:31:54 -0400 Received: from mail.kernel.org ([198.145.29.99]:46538 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243727AbhGOTKC (ORCPT ); Thu, 15 Jul 2021 15:10:02 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 0C1FB61403; Thu, 15 Jul 2021 19:06:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1626375984; bh=KNHNOZZ+57xbiph6fwgBKaFe7XtVUF36GtCnIH/qkvo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XlXgtBJTzatVOWecwtZ3P8XlVjzn/mDwU44Fu6CKjap3N+E3k7j7DC0E+T96fM1uN Sx8lZZvkrHSAV3EttpAy3Vvy5CZ+eyiQxHNZODiv25yEnDlXA0lO9De+WjO6IPa+dy M0o4yV4eP5joKBH2kd1vAqQvIKvsleJgWt1d6s3k= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Damien Le Moal , Mike Snitzer , Sasha Levin Subject: [PATCH 5.13 070/266] dm: Fix dm_accept_partial_bio() relative to zone management commands Date: Thu, 15 Jul 2021 20:37:05 +0200 Message-Id: <20210715182626.549566706@linuxfoundation.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210715182613.933608881@linuxfoundation.org> References: <20210715182613.933608881@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Damien Le Moal [ Upstream commit 6842d264aa5205da338b6dcc6acfa2a6732558f1 ] Fix dm_accept_partial_bio() to actually check that zone management commands are not passed as explained in the function documentation comment. Also, since a zone append operation cannot be split, add REQ_OP_ZONE_APPEND as a forbidden command. White lines are added around the group of BUG_ON() calls to make the code more legible. Signed-off-by: Damien Le Moal Signed-off-by: Mike Snitzer Signed-off-by: Sasha Levin --- drivers/md/dm.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index ca2aedd8ee7d..11af20080639 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -1237,8 +1237,8 @@ static int dm_dax_zero_page_range(struct dax_device *dax_dev, pgoff_t pgoff, /* * A target may call dm_accept_partial_bio only from the map routine. It is - * allowed for all bio types except REQ_PREFLUSH, REQ_OP_ZONE_RESET, - * REQ_OP_ZONE_OPEN, REQ_OP_ZONE_CLOSE and REQ_OP_ZONE_FINISH. + * allowed for all bio types except REQ_PREFLUSH, REQ_OP_ZONE_* zone management + * operations and REQ_OP_ZONE_APPEND (zone append writes). * * dm_accept_partial_bio informs the dm that the target only wants to process * additional n_sectors sectors of the bio and the rest of the data should be @@ -1268,9 +1268,13 @@ void dm_accept_partial_bio(struct bio *bio, unsigned n_sectors) { struct dm_target_io *tio = container_of(bio, struct dm_target_io, clone); unsigned bi_size = bio->bi_iter.bi_size >> SECTOR_SHIFT; + BUG_ON(bio->bi_opf & REQ_PREFLUSH); + BUG_ON(op_is_zone_mgmt(bio_op(bio))); + BUG_ON(bio_op(bio) == REQ_OP_ZONE_APPEND); BUG_ON(bi_size > *tio->len_ptr); BUG_ON(n_sectors > bi_size); + *tio->len_ptr -= bi_size - n_sectors; bio->bi_iter.bi_size = n_sectors << SECTOR_SHIFT; } -- 2.30.2