From nobody Fri Apr 3 08:36:09 2026 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 F278CECAAA1 for ; Thu, 15 Sep 2022 16:49:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229947AbiIOQtX (ORCPT ); Thu, 15 Sep 2022 12:49:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230021AbiIOQs6 (ORCPT ); Thu, 15 Sep 2022 12:48:58 -0400 Received: from mail-pf1-x432.google.com (mail-pf1-x432.google.com [IPv6:2607:f8b0:4864:20::432]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5DFAE9836A for ; Thu, 15 Sep 2022 09:48:48 -0700 (PDT) Received: by mail-pf1-x432.google.com with SMTP id c198so18623916pfc.13 for ; Thu, 15 Sep 2022 09:48:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=8C9PF5fV/n/yVA3OaBrI0F0iBecyk+zvR56xPQZ3IDQ=; b=j9UNt0PdafuY8eG1vCRzjZeZim0lhfvAaWOmUVbnBHmUWqdPZZ3auOQ0xlsq4Yg25G ssysjc8iJfcpwF872sxTnDKV+At5Lq1lz2NHw7y/c/HRgBxSyb3/AQ8kCSa9CzRaimvX fDowBy/9vfz+mH7HubnE6gAWlEVC/vOtMbAIU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date; bh=8C9PF5fV/n/yVA3OaBrI0F0iBecyk+zvR56xPQZ3IDQ=; b=ezsmBKlRFr4LeLYaiuMOUbxBDhLFs5HwyZbxQC5zAj7W/LvUmhfhyAP69v5r5RdLuu elfl521XM8DRMCyHXtim3ImQ4DstEUwnaVVQ4ngZJcnPCFkt9i+IlIf+/F1rOLJdcG7b mVacK3S4iWQ/7UOj9ppO6DQjSjx0PUEeu7+CowOcwnXehGv2FWdT8vijZrLgjtbh1+N2 P57Bn7quHylVx3Tw8vfXg04z4Cz/NRqk0sWbKc3VYhn3AKHJs7HSGie6aiHKdtvW+4NV s+21Y6E0eHw847PgyZ5L5RoUdHj9yzFV+mUYtygxbpGQc5qyguHWQ8/2OAHbHlzzdCCu 6oGQ== X-Gm-Message-State: ACrzQf1yPCochew+jealI1bUjRkm6xhPvDY5aUF13ZHEP8fWZwOoxaAt Lp+0K1dDh17cVFQtCZDF3JA1jA== X-Google-Smtp-Source: AMsMyM74NUJEGoCBWxXp6ovjj8HVrZVtuoYCAa5cO2wk9AivcidhyvEFeO548cRZFdt3fQKWpEtWLA== X-Received: by 2002:a05:6a00:1691:b0:53b:3f2c:3257 with SMTP id k17-20020a056a00169100b0053b3f2c3257mr882622pfc.21.1663260527748; Thu, 15 Sep 2022 09:48:47 -0700 (PDT) Received: from sarthakkukreti-glaptop.hsd1.ca.comcast.net ([2601:647:4200:b5b0:3af2:34b2:a98a:a652]) by smtp.gmail.com with ESMTPSA id o4-20020a170902bcc400b00177ee563b6dsm13174970pls.33.2022.09.15.09.48.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 15 Sep 2022 09:48:46 -0700 (PDT) From: Sarthak Kukreti X-Google-Original-From: Sarthak Kukreti To: dm-devel@redhat.com, linux-block@vger.kernel.org, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org Cc: Jens Axboe , "Michael S . Tsirkin" , Jason Wang , Paolo Bonzini , Stefan Hajnoczi , Alasdair Kergon , Mike Snitzer , Theodore Ts'o , Andreas Dilger , Bart Van Assche , Daniil Lunev , Evan Green , Gwendal Grignou , Sarthak Kukreti Subject: [PATCH RFC 4/8] fs: Introduce FALLOC_FL_PROVISION Date: Thu, 15 Sep 2022 09:48:22 -0700 Message-Id: <20220915164826.1396245-5-sarthakkukreti@google.com> X-Mailer: git-send-email 2.37.2.789.g6183377224-goog In-Reply-To: <20220915164826.1396245-1-sarthakkukreti@google.com> References: <20220915164826.1396245-1-sarthakkukreti@google.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Sarthak Kukreti FALLOC_FL_PROVISION is a new fallocate() allocation mode that sends a hint to (supported) thinly provisioned block devices to allocate space for the given range of sectors via REQ_OP_PROVISION. Signed-off-by: Sarthak Kukreti --- block/fops.c | 7 ++++++- include/linux/falloc.h | 3 ++- include/uapi/linux/falloc.h | 8 ++++++++ 3 files changed, 16 insertions(+), 2 deletions(-) diff --git a/block/fops.c b/block/fops.c index b90742595317..a436a7596508 100644 --- a/block/fops.c +++ b/block/fops.c @@ -605,7 +605,8 @@ static ssize_t blkdev_read_iter(struct kiocb *iocb, str= uct iov_iter *to) =20 #define BLKDEV_FALLOC_FL_SUPPORTED \ (FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | \ - FALLOC_FL_ZERO_RANGE | FALLOC_FL_NO_HIDE_STALE) + FALLOC_FL_ZERO_RANGE | FALLOC_FL_NO_HIDE_STALE | \ + FALLOC_FL_PROVISION) =20 static long blkdev_fallocate(struct file *file, int mode, loff_t start, loff_t len) @@ -661,6 +662,10 @@ static long blkdev_fallocate(struct file *file, int mo= de, loff_t start, error =3D blkdev_issue_discard(bdev, start >> SECTOR_SHIFT, len >> SECTOR_SHIFT, GFP_KERNEL); break; + case FALLOC_FL_PROVISION: + error =3D blkdev_issue_provision(bdev, start >> SECTOR_SHIFT, + len >> SECTOR_SHIFT, GFP_KERNEL); + break; default: error =3D -EOPNOTSUPP; } diff --git a/include/linux/falloc.h b/include/linux/falloc.h index f3f0b97b1675..a0e506255b20 100644 --- a/include/linux/falloc.h +++ b/include/linux/falloc.h @@ -30,7 +30,8 @@ struct space_resv { FALLOC_FL_COLLAPSE_RANGE | \ FALLOC_FL_ZERO_RANGE | \ FALLOC_FL_INSERT_RANGE | \ - FALLOC_FL_UNSHARE_RANGE) + FALLOC_FL_UNSHARE_RANGE | \ + FALLOC_FL_PROVISION) =20 /* on ia32 l_start is on a 32-bit boundary */ #if defined(CONFIG_X86_64) diff --git a/include/uapi/linux/falloc.h b/include/uapi/linux/falloc.h index 51398fa57f6c..2d323d113eed 100644 --- a/include/uapi/linux/falloc.h +++ b/include/uapi/linux/falloc.h @@ -77,4 +77,12 @@ */ #define FALLOC_FL_UNSHARE_RANGE 0x40 =20 +/* + * FALLOC_FL_PROVISION acts as a hint for thinly provisioned devices to al= locate + * blocks for the range/EOF. + * + * FALLOC_FL_PROVISION can only be used with allocate-mode fallocate. + */ +#define FALLOC_FL_PROVISION 0x80 + #endif /* _UAPI_FALLOC_H_ */ --=20 2.31.0