From patchwork Thu Mar 30 11:36:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ming Lei X-Patchwork-Id: 13194023 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 59089C761AF for ; Thu, 30 Mar 2023 11:39:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231377AbjC3Lja (ORCPT ); Thu, 30 Mar 2023 07:39:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48374 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231751AbjC3LjK (ORCPT ); Thu, 30 Mar 2023 07:39:10 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CF96E185 for ; Thu, 30 Mar 2023 04:37:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1680176255; 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=JNbNt4+4j7uotteDVresqW1K7F7sRH7gkel0Q5ckrba/xA+ucqprJ4/5RgDi+vdGkoZ3kB ZNmTnkYn1TD+E86CSrA19JaDnsInq7Dc1soHgL0+e0GCDbqHIIV6sws6uD3kCc4FxUX+4f jvQLDieVw7O631Z9+psW68rQMh+Of4s= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-394-d9eIhHUuNxuCqp6OWPS7FQ-1; Thu, 30 Mar 2023 07:37:31 -0400 X-MC-Unique: d9eIhHUuNxuCqp6OWPS7FQ-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 669CB3815EF1; Thu, 30 Mar 2023 11:37:29 +0000 (UTC) Received: from localhost (ovpn-8-19.pek2.redhat.com [10.72.8.19]) by smtp.corp.redhat.com (Postfix) with ESMTP id 6F3811121330; Thu, 30 Mar 2023 11:37:28 +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 V6 11/17] block: ublk_drv: cleanup 'struct ublk_map_data' Date: Thu, 30 Mar 2023 19:36:24 +0800 Message-Id: <20230330113630.1388860-12-ming.lei@redhat.com> In-Reply-To: <20230330113630.1388860-1-ming.lei@redhat.com> References: <20230330113630.1388860-1-ming.lei@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.3 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; }