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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5271BC433F5 for ; Thu, 14 Apr 2022 13:15:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242736AbiDNNR5 (ORCPT ); Thu, 14 Apr 2022 09:17:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37094 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S243758AbiDNNRY (ORCPT ); Thu, 14 Apr 2022 09:17:24 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5B9B58F98A; Thu, 14 Apr 2022 06:14:59 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id CF75BB8296A; Thu, 14 Apr 2022 13:14:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 246E8C385A5; Thu, 14 Apr 2022 13:14:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1649942096; bh=jMe3cv4kv99rOLCXIlW8C4+xmynCfB84cP/ysUHi+Nw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HR42KTW9XsAAuuBHpEsK0OuYLKzhSp/VW4G9xSOPWLXQRoFC/0RocsLNg19m+KTQ8 CCAeFMO8jq1AqUvOu3CzfmNaX7nJYJgQVOYcVUZO19MIVKGlpkrGmuiPDut5X1ta+t G28sf2T/eJ8Zx48RdbkDyXDc8cpOPMaTPaaMbu+A= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Xie Yongji , Jens Axboe , Lee Jones Subject: [PATCH 4.19 014/338] block: Add a helper to validate the block size Date: Thu, 14 Apr 2022 15:08:37 +0200 Message-Id: <20220414110839.298193727@linuxfoundation.org> X-Mailer: git-send-email 2.35.2 In-Reply-To: <20220414110838.883074566@linuxfoundation.org> References: <20220414110838.883074566@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: Xie Yongji commit 570b1cac477643cbf01a45fa5d018430a1fddbce upstream. There are some duplicated codes to validate the block size in block drivers. This limitation actually comes from block layer, so this patch tries to add a new block layer helper for that. Signed-off-by: Xie Yongji Link: https://lore.kernel.org/r/20211026144015.188-2-xieyongji@bytedance.com Signed-off-by: Jens Axboe Signed-off-by: Lee Jones Signed-off-by: Greg Kroah-Hartman --- include/linux/blkdev.h | 8 ++++++++ 1 file changed, 8 insertions(+) --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -56,6 +56,14 @@ struct blk_stat_callback; */ #define BLKCG_MAX_POLS 5 +static inline int blk_validate_block_size(unsigned int bsize) +{ + if (bsize < 512 || bsize > PAGE_SIZE || !is_power_of_2(bsize)) + return -EINVAL; + + return 0; +} + typedef void (rq_end_io_fn)(struct request *, blk_status_t); #define BLK_RL_SYNCFULL (1U << 0)