From patchwork Thu Dec 29 08:12:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sarthak Kukreti X-Patchwork-Id: 13083348 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 B59D0C4332F for ; Thu, 29 Dec 2022 08:13:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232749AbiL2INq (ORCPT ); Thu, 29 Dec 2022 03:13:46 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37940 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233061AbiL2INT (ORCPT ); Thu, 29 Dec 2022 03:13:19 -0500 Received: from mail-pl1-x631.google.com (mail-pl1-x631.google.com [IPv6:2607:f8b0:4864:20::631]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F12F1120A7 for ; Thu, 29 Dec 2022 00:13:08 -0800 (PST) Received: by mail-pl1-x631.google.com with SMTP id jn22so18252784plb.13 for ; Thu, 29 Dec 2022 00:13:08 -0800 (PST) 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 :message-id:reply-to; bh=fhwgSmWbUilpxRzNOrlzxGBN+MAQ1cWKROitwl2Rvss=; b=bepAnhHSak5DeT1Zsd8c8KCFewRJzufY+EE08OPJE7L1K7tKI0YHbxGeuiXkJ9d24R jMqCVu4dGIG+bmz+f7xpeMxZHGq4LMC2iLPaP3PZTpbdTFlP2lV69MQ4+mx00dOR2dJZ QBrNT195qu3kGtPChfT42OjLmjv/EVWUgBRuU= 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:message-id:reply-to; bh=fhwgSmWbUilpxRzNOrlzxGBN+MAQ1cWKROitwl2Rvss=; b=x4GBmYQbb/9ekf4HtKmRgco7dLtGfzn9z/PWx0GxSHAcuKUGSnI6NrNk8yUfVU7zY5 4+BtceXIIxe5tYshBytZwVgGwlpPdbo2xo9FdMjDrdogbWQUPGisBY9pG7XV3tuNK9Ob sVnvemam+YYoT6iUG36x2C8otH/sw96rf/8028Evb4Wsq+GNDkBw15QHzQyCqXnqDi8f uVnnpy5+zL1ofUj66YVUydsz1VYNmmzypLHqBJMxL2Q5giZWdGW5Hd8ilr61QIc7jxZv y9hYtPiJyDOvTJWQwG+2t9a033RoJv1dWpEmmvubJPFJBD57wBpJzCQhfqZQ1pCyy8oM oKBg== X-Gm-Message-State: AFqh2kogemfjH8hj0nZNBt9vK83tsY6Rr7dhbsIIvObewQZy4SYFckrl VNHKkIG7siGtJTgzlmzLPiByGQ== X-Google-Smtp-Source: AMrXdXsfxrE5D4/Xt700H4PYzZ8Ma4wkTdnT8ETSbdWhxq69HhaH3ZOTjdO9/P9vNXRG8/2E7BEx7w== X-Received: by 2002:a17:902:d192:b0:192:77df:45d9 with SMTP id m18-20020a170902d19200b0019277df45d9mr12575286plb.17.1672301588655; Thu, 29 Dec 2022 00:13:08 -0800 (PST) Received: from sarthakkukreti-glaptop.hsd1.ca.comcast.net ([2601:647:4200:b5b0:75ff:1277:3d7b:d67a]) by smtp.gmail.com with ESMTPSA id 12-20020a170902e9cc00b00192820d00d0sm6496325plk.120.2022.12.29.00.13.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Dec 2022 00:13:07 -0800 (PST) From: Sarthak Kukreti To: sarthakkukreti@google.com, dm-devel@redhat.com, linux-block@vger.kernel.org, linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Cc: Jens Axboe , "Michael S. Tsirkin" , Jason Wang , Stefan Hajnoczi , Alasdair Kergon , Mike Snitzer , Christoph Hellwig , Brian Foster , Theodore Ts'o , Andreas Dilger , Bart Van Assche , Daniil Lunev , "Darrick J. Wong" Subject: [PATCH v2 4/7] loop: Add support for provision requests Date: Thu, 29 Dec 2022 00:12:49 -0800 Message-Id: <20221229081252.452240-5-sarthakkukreti@chromium.org> X-Mailer: git-send-email 2.39.0.314.g84b9a713c41-goog In-Reply-To: <20221229081252.452240-1-sarthakkukreti@chromium.org> References: <20221229081252.452240-1-sarthakkukreti@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Add support for provision requests to loopback devices. Loop devices will configure provision support based on whether the underlying block device/file can support the provision request and upon receiving a provision bio, will map it to the backing device/storage. Signed-off-by: Sarthak Kukreti --- drivers/block/loop.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/drivers/block/loop.c b/drivers/block/loop.c index 1518a6423279..64ebb0d60c0e 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -327,6 +327,24 @@ static int lo_fallocate(struct loop_device *lo, struct request *rq, loff_t pos, return ret; } +static int lo_req_provision(struct loop_device *lo, struct request *rq, loff_t pos) +{ + struct file *file = lo->lo_backing_file; + struct request_queue *q = lo->lo_queue; + int ret; + + if (!q->limits.max_provision_sectors) { + ret = -EOPNOTSUPP; + goto out; + } + + ret = file->f_op->fallocate(file, FALLOC_FL_PROVISION, pos, blk_rq_bytes(rq)); + if (unlikely(ret && ret != -EINVAL && ret != -EOPNOTSUPP)) + ret = -EIO; + out: + return ret; +} + static int lo_req_flush(struct loop_device *lo, struct request *rq) { int ret = vfs_fsync(lo->lo_backing_file, 0); @@ -488,6 +506,8 @@ static int do_req_filebacked(struct loop_device *lo, struct request *rq) FALLOC_FL_PUNCH_HOLE); case REQ_OP_DISCARD: return lo_fallocate(lo, rq, pos, FALLOC_FL_PUNCH_HOLE); + case REQ_OP_PROVISION: + return lo_req_provision(lo, rq, pos); case REQ_OP_WRITE: if (cmd->use_aio) return lo_rw_aio(lo, cmd, pos, ITER_SOURCE); @@ -754,6 +774,25 @@ static void loop_sysfs_exit(struct loop_device *lo) &loop_attribute_group); } +static void loop_config_provision(struct loop_device *lo) +{ + struct file *file = lo->lo_backing_file; + struct inode *inode = file->f_mapping->host; + + /* + * If the backing device is a block device, mirror its provisioning + * capability. + */ + if (S_ISBLK(inode->i_mode)) { + blk_queue_max_provision_sectors(lo->lo_queue, + bdev_max_provision_sectors(I_BDEV(inode))); + } else if (file->f_op->fallocate) { + blk_queue_max_provision_sectors(lo->lo_queue, UINT_MAX >> 9); + } else { + blk_queue_max_provision_sectors(lo->lo_queue, 0); + } +} + static void loop_config_discard(struct loop_device *lo) { struct file *file = lo->lo_backing_file; @@ -1092,6 +1131,7 @@ static int loop_configure(struct loop_device *lo, fmode_t mode, blk_queue_io_min(lo->lo_queue, bsize); loop_config_discard(lo); + loop_config_provision(lo); loop_update_rotational(lo); loop_update_dio(lo); loop_sysfs_init(lo); @@ -1304,6 +1344,7 @@ loop_set_status(struct loop_device *lo, const struct loop_info64 *info) } loop_config_discard(lo); + loop_config_provision(lo); /* update dio if lo_offset or transfer is changed */ __loop_update_dio(lo, lo->use_dio); @@ -1824,6 +1865,7 @@ static blk_status_t loop_queue_rq(struct blk_mq_hw_ctx *hctx, case REQ_OP_FLUSH: case REQ_OP_DISCARD: case REQ_OP_WRITE_ZEROES: + case REQ_OP_PROVISION: cmd->use_aio = false; break; default: