From patchwork Fri Aug 4 13:13:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Howells X-Patchwork-Id: 13341831 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 7B1E5C04E69 for ; Fri, 4 Aug 2023 13:15:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230156AbjHDNPx (ORCPT ); Fri, 4 Aug 2023 09:15:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56932 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230331AbjHDNPv (ORCPT ); Fri, 4 Aug 2023 09:15:51 -0400 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E933D49F5 for ; Fri, 4 Aug 2023 06:13:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1691154827; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/PSucnWQdCSSwhW59bqPEA79MtMmsRFldRQW3qSRU0U=; b=T65x3eauVIM8CvyeDqxQvFuL2GpfAL8pP08laawf3FyVFGJmhR2trHRDNhZN+5k+f4uNCG ysFKbQHnUD859PGFXGqXyrCyRK5MH2ihnTyQsP/tbBMg50llUemdk2P6AtiwpJ+XVp3hyc Q/g2LoWS6N6bZ8EX5xjgfDl1l5djr+g= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-644-UfFS_D__P02OO0SOFrv8qw-1; Fri, 04 Aug 2023 09:13:42 -0400 X-MC-Unique: UfFS_D__P02OO0SOFrv8qw-1 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.rdu2.redhat.com [10.11.54.5]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 950FD8022EF; Fri, 4 Aug 2023 13:13:41 +0000 (UTC) Received: from warthog.procyon.org.uk (unknown [10.42.28.131]) by smtp.corp.redhat.com (Postfix) with ESMTP id 4AE8DF7FB6; Fri, 4 Aug 2023 13:13:40 +0000 (UTC) From: David Howells To: Ilya Dryomov , Xiubo Li Cc: David Howells , Jeff Layton , Dongsheng Yang , ceph-devel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 05/18] rbd: Use ceph_databuf for rbd_obj_read_sync() Date: Fri, 4 Aug 2023 14:13:14 +0100 Message-ID: <20230804131327.2574082-6-dhowells@redhat.com> In-Reply-To: <20230804131327.2574082-1-dhowells@redhat.com> References: <20230804131327.2574082-1-dhowells@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org Supply a ceph_databuf to rbd_obj_read_sync() to convey the data. Signed-off-by: David Howells --- drivers/block/rbd.c | 45 ++++++++++++++++++++------------------------- 1 file changed, 20 insertions(+), 25 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 08d0908d0583..2a161b03dd7a 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -4762,13 +4762,10 @@ static void rbd_free_disk(struct rbd_device *rbd_dev) static int rbd_obj_read_sync(struct rbd_device *rbd_dev, struct ceph_object_id *oid, struct ceph_object_locator *oloc, - void *buf, int buf_len) - + struct ceph_databuf *dbuf, int len) { struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc; struct ceph_osd_request *req; - struct page **pages; - int num_pages = calc_pages_for(0, buf_len); int ret; req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_KERNEL); @@ -4779,15 +4776,8 @@ static int rbd_obj_read_sync(struct rbd_device *rbd_dev, ceph_oloc_copy(&req->r_base_oloc, oloc); req->r_flags = CEPH_OSD_FLAG_READ; - pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL); - if (IS_ERR(pages)) { - ret = PTR_ERR(pages); - goto out_req; - } - - osd_req_op_extent_init(req, 0, CEPH_OSD_OP_READ, 0, buf_len, 0, 0); - osd_req_op_extent_osd_data_pages(req, 0, pages, buf_len, 0, false, - true); + osd_req_op_extent_init(req, 0, CEPH_OSD_OP_READ, 0, len, 0, 0); + osd_req_op_extent_osd_databuf(req, 0, dbuf); ret = ceph_osdc_alloc_messages(req, GFP_KERNEL); if (ret) @@ -4795,9 +4785,6 @@ static int rbd_obj_read_sync(struct rbd_device *rbd_dev, ceph_osdc_start_request(osdc, req); ret = ceph_osdc_wait_request(osdc, req); - if (ret >= 0) - ceph_copy_from_page_vector(pages, buf, 0, ret); - out_req: ceph_osdc_put_request(req); return ret; @@ -4810,12 +4797,18 @@ static int rbd_obj_read_sync(struct rbd_device *rbd_dev, */ static int rbd_dev_v1_header_info(struct rbd_device *rbd_dev) { - struct rbd_image_header_ondisk *ondisk = NULL; + struct rbd_image_header_ondisk *ondisk; + struct ceph_databuf *dbuf = NULL; u32 snap_count = 0; u64 names_size = 0; u32 want_count; int ret; + dbuf = ceph_databuf_alloc(1, sizeof(*ondisk), GFP_KERNEL); + if (!dbuf) + return -ENOMEM; + ondisk = kmap_ceph_databuf_page(dbuf, 0); + /* * The complete header will include an array of its 64-bit * snapshot ids, followed by the names of those snapshots as @@ -4826,17 +4819,18 @@ static int rbd_dev_v1_header_info(struct rbd_device *rbd_dev) do { size_t size; - kfree(ondisk); - size = sizeof (*ondisk); size += snap_count * sizeof (struct rbd_image_snap_ondisk); size += names_size; - ondisk = kmalloc(size, GFP_KERNEL); - if (!ondisk) - return -ENOMEM; + + ret = -ENOMEM; + if (size > dbuf->limit && + ceph_databuf_reserve(dbuf, size - dbuf->limit, + GFP_KERNEL) < 0) + goto out; ret = rbd_obj_read_sync(rbd_dev, &rbd_dev->header_oid, - &rbd_dev->header_oloc, ondisk, size); + &rbd_dev->header_oloc, dbuf, size); if (ret < 0) goto out; if ((size_t)ret < size) { @@ -4845,6 +4839,7 @@ static int rbd_dev_v1_header_info(struct rbd_device *rbd_dev) size, ret); goto out; } + if (!rbd_dev_ondisk_valid(ondisk)) { ret = -ENXIO; rbd_warn(rbd_dev, "invalid header"); @@ -4858,8 +4853,8 @@ static int rbd_dev_v1_header_info(struct rbd_device *rbd_dev) ret = rbd_header_from_disk(rbd_dev, ondisk); out: - kfree(ondisk); - + kunmap_local(ondisk); + ceph_databuf_release(dbuf); return ret; }