From nobody Sun Feb 8 18:10:44 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1513343757082705.4699649644159; Fri, 15 Dec 2017 05:15:57 -0800 (PST) Received: from localhost ([::1]:46184 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ePppw-0002gj-Eb for importer@patchew.org; Fri, 15 Dec 2017 08:15:36 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55494) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ePpVG-0000Wl-Qa for qemu-devel@nongnu.org; Fri, 15 Dec 2017 07:54:18 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ePpVC-0003Hb-9y for qemu-devel@nongnu.org; Fri, 15 Dec 2017 07:54:14 -0500 Received: from fanzine.igalia.com ([91.117.99.155]:48104) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1ePpVA-0003CU-RS; Fri, 15 Dec 2017 07:54:10 -0500 Received: from [192.168.12.179] (helo=perseus.local) by fanzine.igalia.com with esmtpsa (Cipher TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim) id 1ePpV8-00084i-55; Fri, 15 Dec 2017 13:54:06 +0100 Received: from berto by perseus.local with local (Exim 4.89) (envelope-from ) id 1ePpV7-0004Dn-Vo; Fri, 15 Dec 2017 14:54:05 +0200 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=References:In-Reply-To:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From; bh=3spTMx+2bEmTClshxBrEMirYDuCrk3g8eUSK0e4u3mw=; b=EaoeXm3Pp+Ou7omwiSpBUyBB1tPd7zEP0ZqL+PhYTKH4juMv73mRh7mbxKNuei+QizNNzr9SFTLVhqukpSQY5AsdjzqCJAqu6ovpP/p/L7zN16wgCbz6oFQ3PDUR0PojV3ItCCGLnzu2v1efWTx/LmPS7QvPv51dzbZ6Teim89khI4xj1cmngDCJEPsEVCZx0ijo+Fy9SRRNtZo5RGO3IT6C+QJBqwogNsdKpXGsx6fHTV09+3mUjGbtpDffY6B4VZYXBvc5JnI2KHk9bWeKiowKhuy1Yh3h5zESFeNlksaqbpm2ylOcCBaWMCGiDobr/3k0rCyR9G0XbeCG5WP1WQ==; From: Alberto Garcia To: qemu-devel@nongnu.org Date: Fri, 15 Dec 2017 13:53:49 +0100 Message-Id: <976f6bac137cdbdf45e5aafe140aad5833db087f.1513342045.git.berto@igalia.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: References: In-Reply-To: References: X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x (no timestamps) [generic] [fuzzy] X-Received-From: 91.117.99.155 Subject: [Qemu-devel] [PATCH v2 21/32] qcow2: Update handle_alloc() to support L2 slices X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , "Denis V . Lunev" , Alberto Garcia , qemu-block@nongnu.org, Max Reitz Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" handle_alloc() loads an L2 table and limits the number of checked clusters to the amount that fits inside that table. Since we'll be loading L2 slices instead of full tables we need to update that limit. Apart from that, this function doesn't need any additional changes, so this patch simply updates the variable name from l2_table to l2_slice. Signed-off-by: Alberto Garcia Reviewed-by: Eric Blake --- block/qcow2-cluster.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c index 09b6dc984f..0d126581bd 100644 --- a/block/qcow2-cluster.c +++ b/block/qcow2-cluster.c @@ -1283,7 +1283,7 @@ static int handle_alloc(BlockDriverState *bs, uint64_= t guest_offset, { BDRVQcow2State *s =3D bs->opaque; int l2_index; - uint64_t *l2_table; + uint64_t *l2_slice; uint64_t entry; uint64_t nb_clusters; int ret; @@ -1296,29 +1296,29 @@ static int handle_alloc(BlockDriverState *bs, uint6= 4_t guest_offset, assert(*bytes > 0); =20 /* - * Calculate the number of clusters to look for. We stop at L2 table + * Calculate the number of clusters to look for. We stop at L2 slice * boundaries to keep things simple. */ nb_clusters =3D size_to_clusters(s, offset_into_cluster(s, guest_offset) + *bytes); =20 - l2_index =3D offset_to_l2_index(s, guest_offset); - nb_clusters =3D MIN(nb_clusters, s->l2_size - l2_index); + l2_index =3D offset_to_l2_slice_index(s, guest_offset); + nb_clusters =3D MIN(nb_clusters, s->l2_slice_size - l2_index); assert(nb_clusters <=3D INT_MAX); =20 /* Find L2 entry for the first involved cluster */ - ret =3D get_cluster_table(bs, guest_offset, &l2_table, &l2_index); + ret =3D get_cluster_table(bs, guest_offset, &l2_slice, &l2_index); if (ret < 0) { return ret; } =20 - entry =3D be64_to_cpu(l2_table[l2_index]); + entry =3D be64_to_cpu(l2_slice[l2_index]); =20 /* For the moment, overwrite compressed clusters one by one */ if (entry & QCOW_OFLAG_COMPRESSED) { nb_clusters =3D 1; } else { - nb_clusters =3D count_cow_clusters(s, nb_clusters, l2_table, l2_in= dex); + nb_clusters =3D count_cow_clusters(s, nb_clusters, l2_slice, l2_in= dex); } =20 /* This function is only called when there were no non-COW clusters, s= o if @@ -1347,7 +1347,7 @@ static int handle_alloc(BlockDriverState *bs, uint64_= t guest_offset, * nb_clusters already to a range of COW clusters */ preallocated_nb_clusters =3D count_contiguous_clusters(nb_clusters, s->cluster_size, - &l2_table[l2_index], QCOW_OFLAG_COPI= ED); + &l2_slice[l2_index], QCOW_OFLAG_COPI= ED); assert(preallocated_nb_clusters > 0); =20 nb_clusters =3D preallocated_nb_clusters; @@ -1358,7 +1358,7 @@ static int handle_alloc(BlockDriverState *bs, uint64_= t guest_offset, keep_old_clusters =3D true; } =20 - qcow2_cache_put(s->l2_table_cache, (void **) &l2_table); + qcow2_cache_put(s->l2_table_cache, (void **) &l2_slice); =20 if (!alloc_cluster_offset) { /* Allocate, if necessary at a given offset in the image file */ --=20 2.11.0