From patchwork Sun Sep 6 07:40:18 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tom Yan X-Patchwork-Id: 11759463 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2CAA714F9 for ; Sun, 6 Sep 2020 07:40:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1147C208C7 for ; Sun, 6 Sep 2020 07:40:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="BSlDNWvM" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728257AbgIFHkk (ORCPT ); Sun, 6 Sep 2020 03:40:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43134 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725306AbgIFHki (ORCPT ); Sun, 6 Sep 2020 03:40:38 -0400 Received: from mail-pf1-x444.google.com (mail-pf1-x444.google.com [IPv6:2607:f8b0:4864:20::444]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9B18EC061573; Sun, 6 Sep 2020 00:40:37 -0700 (PDT) Received: by mail-pf1-x444.google.com with SMTP id o68so6955236pfg.2; Sun, 06 Sep 2020 00:40:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=Ayb3Up2Q6+b+eLmNUc0tgAqbzpNo/tgv5jEUsoMm/U4=; b=BSlDNWvMtF3qqwSlDIoXIljkIOF60ZUstGi3KbbbT3ib8XqseezF7QEiuVJkVKq8tZ mrbgV4f03TWbqUcMPgCo326rr2KwSzb2Nwnuj2PnTyCHOACykiUvWDdCkHBRs88vhHU0 57spo2yBQyyT7xhmpUbfjZzvIPeuM9UBwQZEXgADur8oqX2au1ZIU7KIFI+lCE7MPZWn Pw3LnwnS5ezLUyyKBKGyBgz+eAY1/vRJSipHWzzFml3m4bOiHWIwy+ShT8M3oM2TqKLa h0rcMDwp5jx7QiwgWtm372VQ2lHIT6DK0UbabZ3tLWN4b3/PRNs/Dn0QEnlQ6Zxb4ych W1BA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=Ayb3Up2Q6+b+eLmNUc0tgAqbzpNo/tgv5jEUsoMm/U4=; b=MlCU8Ex6cL5xkEUXrs75jNrQ3M4Z2LDfCJcWRf60221YfhSQjAgeuX7wBT15zMfAIr fNO5kHyEDMY7M4RUAPiEbMCeOFT93QpGKJ6hhm8E1jvSoflwEemQHax0kK1Zvvf8jwx3 odKSwSVROI1CEjS4/+4sDypYfAydkprjfxI44FIMx24e0M9cet3aNZWjf95D6t1rWnjF BzJgZb9+PqQPQaHOTC1tjcXY9oWrSvEwUpJkrGW9x4MuqcVD5Xap1+/pgdYzJ4WNQoQ/ 2Jqbt6tONU3x/WoQfK/T73HEL6hOQLMKqf9sZyPWuHD1m30NluAnJs6RZR3GVv/lu8W8 5y5g== X-Gm-Message-State: AOAM53098uVMdG8EC1GaamAVgBS7Yn/geqygJS2n3cGpOwjXOMLvmfBu 3EvqSlyywBVTpjXLEu9vS+Sag0TAdEY= X-Google-Smtp-Source: ABdhPJy/+qBXn7/I6RjmouOt15BBXWpX1lP/qCQd0RXbUSttMoAoIqh0KltfvVu4tjVGD0mkZzGBzQ== X-Received: by 2002:a63:5c5c:: with SMTP id n28mr12804595pgm.198.1599378036669; Sun, 06 Sep 2020 00:40:36 -0700 (PDT) Received: from localhost.localdomain ([161.81.62.213]) by smtp.gmail.com with ESMTPSA id f28sm11634243pfq.191.2020.09.06.00.40.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 06 Sep 2020 00:40:36 -0700 (PDT) From: Tom Yan To: linux-scsi@vger.kernel.org, dgilbert@interlog.com, bvanassche@acm.org, gregkh@linuxfoundation.org Cc: stern@rowland.harvard.edu, akinobu.mita@gmail.com, hch@lst.de, linux-api@vger.kernel.org, Tom Yan Subject: [PATCH v2 4/4] block/scsi_ioctl.c: use queue_logical_sector_size() in max_sectors_bytes() Date: Sun, 6 Sep 2020 15:40:18 +0800 Message-Id: <20200906074018.2370-4-tom.ty89@gmail.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200906074018.2370-1-tom.ty89@gmail.com> References: <20200906074018.2370-1-tom.ty89@gmail.com> MIME-Version: 1.0 Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Programatically speaking it may not be necessary for us to clamp max_sectors to USHRT_MAX here, but since such clamping is used in BLKSECTGET, it's probably a good idea to have it here too, so that what the function returns is consistent to what the ioctl reports. Alternatively we can clamp (max_sectors * logical_block_size) to INT_MAX instead, or maybe even not clamping it at all. P.S. sg_reserved_size is initially set to INT_MAX by blk_mq_init_allocated_queue(). Signed-off-by: Tom Yan --- block/scsi_ioctl.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c index ef722f04f88a..ae6aae40a8b6 100644 --- a/block/scsi_ioctl.c +++ b/block/scsi_ioctl.c @@ -73,10 +73,11 @@ static int sg_set_timeout(struct request_queue *q, int __user *p) static int max_sectors_bytes(struct request_queue *q) { unsigned int max_sectors = queue_max_sectors(q); + unsigned int logical_block_size = queue_logical_block_size(q); - max_sectors = min_t(unsigned int, max_sectors, INT_MAX >> 9); + max_sectors = min_t(unsigned int, max_sectors, USHRT_MAX); - return max_sectors << 9; + return max_sectors * logical_block_size; } static int sg_get_reserved_size(struct request_queue *q, int __user *p)