From patchwork Mon Mar 15 20:02:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Matteo Croce X-Patchwork-Id: 12140597 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, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 77FC3C433DB for ; Mon, 15 Mar 2021 20:04:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 389C564F50 for ; Mon, 15 Mar 2021 20:04:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233981AbhCOUDj (ORCPT ); Mon, 15 Mar 2021 16:03:39 -0400 Received: from mail-ed1-f43.google.com ([209.85.208.43]:39838 "EHLO mail-ed1-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233950AbhCOUDW (ORCPT ); Mon, 15 Mar 2021 16:03:22 -0400 Received: by mail-ed1-f43.google.com with SMTP id bf3so18797394edb.6; Mon, 15 Mar 2021 13:03:21 -0700 (PDT) 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=PkEBTQQrAWt7QcNipJG5buCi2jRQQ6g6Fca4O51wY5Q=; b=fG3Vy5Siod/fTIZnl1KkrxS7Y/WkH2sixbBJprMjoT7CRCZNGq49awjcPx/i/x48KZ +4IwUGYM797ClgX0sB2ypracyR79R9w8vRf4P/7PVoInYlplTf4wemNtSr9ohBew33KW sPJrSNyfj/zS66rkT39V9PvraBHDlns8ZVtF8cGOPnvvthcMh5bj7sJ9XNqaUnEJZmTD BvUfZ0icTBE5Nvhb2wXYzVRqk3q5wpSBJMD/oOMeRarFKOUEyODfGDo29g+nU/yXk0hw 05njmdnNfZK6w5mucmOyuere3xBxxGunNOucS02t/mOyX0FglQCkRafBdDb/n2SHbd+R YnHg== X-Gm-Message-State: AOAM532/oWlnmmcokHx3D/cOOjgXI0Ep9WlxbXxBlNrnV3iXPGb7vXas qhQp3MPAjPISArAVYO6SMe3wbNPKS1uVjA== X-Google-Smtp-Source: ABdhPJyNiNaYH6YrJrOURMkyP3WP5we/k2e2MFDLCnGL67kn/AFEzJYHBMztDjoMSyYxT/KPdK92Rw== X-Received: by 2002:a05:6402:12cf:: with SMTP id k15mr31093245edx.192.1615838601126; Mon, 15 Mar 2021 13:03:21 -0700 (PDT) Received: from msft-t490s.teknoraver.net (net-188-216-41-250.cust.vodafonedsl.it. [188.216.41.250]) by smtp.gmail.com with ESMTPSA id x21sm8551210eds.53.2021.03.15.13.03.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 15 Mar 2021 13:03:20 -0700 (PDT) From: Matteo Croce To: linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Lennart Poettering , Luca Boccassi , Jens Axboe , Alexander Viro , Damien Le Moal , Tejun Heo , =?utf-8?q?Javier_Gonz=C3=A1lez?= , Niklas Cassel , Johannes Thumshirn , Hannes Reinecke Subject: [PATCH -next 2/5] block: add ioctl to read the disk sequence number Date: Mon, 15 Mar 2021 21:02:39 +0100 Message-Id: <20210315200242.67355-3-mcroce@linux.microsoft.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210315200242.67355-1-mcroce@linux.microsoft.com> References: <20210315200242.67355-1-mcroce@linux.microsoft.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: Matteo Croce Add a new BLKGETDISKSEQ ioctl which retrieves the disk sequence number from the genhd structure. Signed-off-by: Matteo Croce --- block/ioctl.c | 2 ++ include/uapi/linux/fs.h | 1 + 2 files changed, 3 insertions(+) diff --git a/block/ioctl.c b/block/ioctl.c index ff241e663c01..266315d00942 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -467,6 +467,8 @@ static int blkdev_common_ioctl(struct block_device *bdev, fmode_t mode, BLKDEV_DISCARD_SECURE); case BLKZEROOUT: return blk_ioctl_zeroout(bdev, mode, arg); + case BLKGETDISKSEQ: + return put_u64(argp, bdev->bd_disk->diskseq); case BLKREPORTZONE: return blkdev_report_zones_ioctl(bdev, mode, cmd, arg); case BLKRESETZONE: diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index f44eb0a04afd..5dc72bbdd9b7 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -184,6 +184,7 @@ struct fsxattr { #define BLKSECDISCARD _IO(0x12,125) #define BLKROTATIONAL _IO(0x12,126) #define BLKZEROOUT _IO(0x12,127) +#define BLKGETDISKSEQ _IOR(0x12,128,__u64) /* * A jump here: 130-131 are reserved for zoned block devices * (see uapi/linux/blkzoned.h)