From patchwork Mon Jul 12 05:48:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 12370237 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=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 51719C07E9B for ; Mon, 12 Jul 2021 05:54:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 23E116108B for ; Mon, 12 Jul 2021 05:54:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231869AbhGLF5H (ORCPT ); Mon, 12 Jul 2021 01:57:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48400 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231699AbhGLF5H (ORCPT ); Mon, 12 Jul 2021 01:57:07 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 75A37C0613DD; Sun, 11 Jul 2021 22:54:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=HlcUFEIVbEE+0Mc9Xe9q8VxtXH0SrZnAvqCb53WYPFI=; b=BlG97w4wagxCYjR5kYFZdQgc46 mFFyOot5tVj6Q6Rr/XBcJ33MHT0ZMI3gkhIoVKtpm5Lve8FypCyf0P42k4IScWDS5SzKlbzWRnpUd a/M8C/ZRpHzuP/E74JirDRwX/vKH9gEa+nw7FgeYgeuZ2yACgaqySbwBcB7GmFbHWujmjszzcqOqr aZqXgcPF5/nio6bWV5UGZLxbUMOMc7c7b3Di/seQemzHxivUBLMisR+Avmsd9DPKMuFjPl1+u4poK VDp1+K9yo7glcii7yCdzjANDyN8SEMF8+3P8bhQ7cIsWji0gYStPxtQIo4rEiR7YKGhwte0gcUsnI z4U0pvsw==; Received: from [2001:4bb8:184:8b7c:bd9:61b8:39ba:d78a] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1m2osj-00GvIz-Py; Mon, 12 Jul 2021 05:53:37 +0000 From: Christoph Hellwig To: "Martin K. Petersen" , Jens Axboe , FUJITA Tomonori Cc: Doug Gilbert , =?utf-8?q?Kai_M=C3=A4kisara?= , linux-block@vger.kernel.org, linux-scsi@vger.kernel.org Subject: [PATCH 12/24] block: add a queue_max_sectors_bytes helper Date: Mon, 12 Jul 2021 07:48:04 +0200 Message-Id: <20210712054816.4147559-13-hch@lst.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210712054816.4147559-1-hch@lst.de> References: <20210712054816.4147559-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Return the max_sectors value in bytes. Lifted from scsi_ioctl.c. Signed-off-by: Christoph Hellwig --- block/scsi_ioctl.c | 13 ++----------- include/linux/blkdev.h | 5 +++++ 2 files changed, 7 insertions(+), 11 deletions(-) diff --git a/block/scsi_ioctl.c b/block/scsi_ioctl.c index ca7b84452d9d..b46a04a40db4 100644 --- a/block/scsi_ioctl.c +++ b/block/scsi_ioctl.c @@ -68,18 +68,9 @@ static int sg_set_timeout(struct request_queue *q, int __user *p) return err; } -static int max_sectors_bytes(struct request_queue *q) -{ - unsigned int max_sectors = queue_max_sectors(q); - - max_sectors = min_t(unsigned int, max_sectors, INT_MAX >> 9); - - return max_sectors << 9; -} - static int sg_get_reserved_size(struct request_queue *q, int __user *p) { - int val = min_t(int, q->sg_reserved_size, max_sectors_bytes(q)); + int val = min_t(int, q->sg_reserved_size, queue_max_sectors_bytes(q)); return put_user(val, p); } @@ -94,7 +85,7 @@ static int sg_set_reserved_size(struct request_queue *q, int __user *p) if (size < 0) return -EINVAL; - q->sg_reserved_size = min(size, max_sectors_bytes(q)); + q->sg_reserved_size = min(size, queue_max_sectors_bytes(q)); return 0; } diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index e2b972a85012..c983cd8ecf98 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1373,6 +1373,11 @@ static inline unsigned int queue_max_sectors(const struct request_queue *q) return q->limits.max_sectors; } +static inline int queue_max_sectors_bytes(struct request_queue *q) +{ + return min_t(unsigned int, queue_max_sectors(q), INT_MAX >> 9) << 9; +} + static inline unsigned int queue_max_hw_sectors(const struct request_queue *q) { return q->limits.max_hw_sectors;