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 E5954C3525B for ; Mon, 18 Apr 2022 13:11:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241666AbiDRNMr (ORCPT ); Mon, 18 Apr 2022 09:12:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41104 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241215AbiDRNG7 (ORCPT ); Mon, 18 Apr 2022 09:06:59 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B0FEA2A254; Mon, 18 Apr 2022 05:47:21 -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 dfw.source.kernel.org (Postfix) with ESMTPS id 4D4BE6101A; Mon, 18 Apr 2022 12:47:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 48FEFC385A1; Mon, 18 Apr 2022 12:47:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1650286040; bh=bDq4CJx1GKP2PLiTe4/HEQW+6US9MEefoAoHfnXwjMo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LYNJXzGGcW0VVR3BzgZ87GUrJrlUDIv56iNYMB+z3S4sP65ZWmsce7pInK1sLtNdO JksW+mT2I334I/OduF1SZvwbUXAK+kd4C+UWiW9iUgoyscvcwa0ohCB7I2RO75Abi8 j/SXBBWTp8D0sGTflukeug0kLBLj5ewINT6p6l74= 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 4.14 011/284] block: Add a helper to validate the block size Date: Mon, 18 Apr 2022 14:09:52 +0200 Message-Id: <20220418121211.018253515@linuxfoundation.org> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220418121210.689577360@linuxfoundation.org> References: <20220418121210.689577360@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: stable@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 3 +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)