From patchwork Tue Mar 28 15:09:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Lei X-Patchwork-Id: 13191206 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 58A81C6FD18 for ; Tue, 28 Mar 2023 15:15:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233919AbjC1PP0 (ORCPT ); Tue, 28 Mar 2023 11:15:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54048 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233937AbjC1PPF (ORCPT ); Tue, 28 Mar 2023 11:15:05 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E606210429 for ; Tue, 28 Mar 2023 08:13:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1680016303; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=aRW9a0ZHd+MGeZHqXvtwA5Cp/cxaEC4LxuKjGisTMi4=; b=HacB2/WvU3AVJvTFNjzw2sCnJXYnEw8ADekQjj5OPdYNWf1ulisKi/Pb9EPVlVB1pknYvy Bu57F1n+1PYRCqrH7D5WdGccyVCfU6vp1RpPMdGI2MmgbZnLOQFeyOypFwOfm4dsNDjylF vNy4us+WRtfg9TaJx3gcV/E+dKX3JzM= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-437-CwbPgIyQOWK4ebslNp_Dkg-1; Tue, 28 Mar 2023 11:11:37 -0400 X-MC-Unique: CwbPgIyQOWK4ebslNp_Dkg-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 2C00E185A791; Tue, 28 Mar 2023 15:11:37 +0000 (UTC) Received: from localhost (ovpn-8-20.pek2.redhat.com [10.72.8.20]) by smtp.corp.redhat.com (Postfix) with ESMTP id 304CC440D6; Tue, 28 Mar 2023 15:11:35 +0000 (UTC) From: Ming Lei To: Jens Axboe , io-uring@vger.kernel.org, linux-block@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Miklos Szeredi , ZiyangZhang , Xiaoguang Wang , Bernd Schubert , Pavel Begunkov , Stefan Hajnoczi , Dan Williams , Ming Lei Subject: [PATCH V5 10/16] block: ublk_drv: cleanup 'struct ublk_map_data' Date: Tue, 28 Mar 2023 23:09:52 +0800 Message-Id: <20230328150958.1253547-11-ming.lei@redhat.com> In-Reply-To: <20230328150958.1253547-1-ming.lei@redhat.com> References: <20230328150958.1253547-1-ming.lei@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org 'struct ublk_map_data' is passed to ublk_copy_user_pages() for copying data between userspace buffer and request pages. Here what matters is userspace buffer address/len and 'struct request', so replace ->io field with user buffer address, and rename max_bytes as len. Meantime remove 'ubq' field from ublk_map_data, since it isn't used any more. Then code becomes more readable. Reviewed-by: Ziyang Zhang Signed-off-by: Ming Lei --- drivers/block/ublk_drv.c | 27 ++++++++++++--------------- 1 file changed, 12 insertions(+), 15 deletions(-) diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c index 1c057003a40a..fdccbf5fdaa1 100644 --- a/drivers/block/ublk_drv.c +++ b/drivers/block/ublk_drv.c @@ -420,10 +420,9 @@ static const struct block_device_operations ub_fops = { #define UBLK_MAX_PIN_PAGES 32 struct ublk_map_data { - const struct ublk_queue *ubq; const struct request *rq; - const struct ublk_io *io; - unsigned max_bytes; + unsigned long ubuf; + unsigned int len; }; struct ublk_io_iter { @@ -483,14 +482,14 @@ static inline unsigned ublk_copy_io_pages(struct ublk_io_iter *data, static int ublk_copy_user_pages(struct ublk_map_data *data, bool to_vm) { const unsigned int gup_flags = to_vm ? FOLL_WRITE : 0; - const unsigned long start_vm = data->io->addr; + const unsigned long start_vm = data->ubuf; unsigned int done = 0; struct ublk_io_iter iter = { .pg_off = start_vm & (PAGE_SIZE - 1), .bio = data->rq->bio, .iter = data->rq->bio->bi_iter, }; - const unsigned int nr_pages = round_up(data->max_bytes + + const unsigned int nr_pages = round_up(data->len + (start_vm & (PAGE_SIZE - 1)), PAGE_SIZE) >> PAGE_SHIFT; while (done < nr_pages) { @@ -503,13 +502,13 @@ static int ublk_copy_user_pages(struct ublk_map_data *data, bool to_vm) iter.pages); if (iter.nr_pages <= 0) return done == 0 ? iter.nr_pages : done; - len = ublk_copy_io_pages(&iter, data->max_bytes, to_vm); + len = ublk_copy_io_pages(&iter, data->len, to_vm); for (i = 0; i < iter.nr_pages; i++) { if (to_vm) set_page_dirty(iter.pages[i]); put_page(iter.pages[i]); } - data->max_bytes -= len; + data->len -= len; done += iter.nr_pages; } @@ -538,15 +537,14 @@ static int ublk_map_io(const struct ublk_queue *ubq, const struct request *req, */ if (ublk_need_map_req(req)) { struct ublk_map_data data = { - .ubq = ubq, .rq = req, - .io = io, - .max_bytes = rq_bytes, + .ubuf = io->addr, + .len = rq_bytes, }; ublk_copy_user_pages(&data, true); - return rq_bytes - data.max_bytes; + return rq_bytes - data.len; } return rq_bytes; } @@ -559,17 +557,16 @@ static int ublk_unmap_io(const struct ublk_queue *ubq, if (ublk_need_unmap_req(req)) { struct ublk_map_data data = { - .ubq = ubq, .rq = req, - .io = io, - .max_bytes = io->res, + .ubuf = io->addr, + .len = io->res, }; WARN_ON_ONCE(io->res > rq_bytes); ublk_copy_user_pages(&data, false); - return io->res - data.max_bytes; + return io->res - data.len; } return rq_bytes; }