From mboxrd@z Thu Jan 1 00:00:00 1970 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 EB775C001B0 for ; Sun, 16 Jul 2023 20:32:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232204AbjGPUcN (ORCPT ); Sun, 16 Jul 2023 16:32:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53056 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232221AbjGPUcL (ORCPT ); Sun, 16 Jul 2023 16:32:11 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0A920E4F for ; Sun, 16 Jul 2023 13:32:04 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id D4AF260EBA for ; Sun, 16 Jul 2023 20:32:03 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E3FCCC433C7; Sun, 16 Jul 2023 20:32:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689539523; bh=8eZhiBiJ6y/XU/Pj/aKVLuqs6c3hzJjRGaIQ8ZBlusU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R4jgFBHjCD7VAbcpAyvsVdOI0+z9uo1hlKvF3WxwTdV87BJ/uIqDXZc3CZjlywzGB S3GhO5mqbQ2NylMBdftWAkZv0aRCQsnjWbQ2wSRYy7hK/K8Pjv27gHezgPDW24QUXI CH8zo9f/hBcfNbPonPSDFNg6h8J8dLgTnMjlZcUQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Gao Xiang , Sasha Levin Subject: [PATCH 6.1 037/591] erofs: fix compact 4B support for 16k block size Date: Sun, 16 Jul 2023 21:42:56 +0200 Message-ID: <20230716194924.840233078@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230716194923.861634455@linuxfoundation.org> References: <20230716194923.861634455@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Gao Xiang [ Upstream commit 001b8ccd0650727e54ec16ef72bf1b8eeab7168e ] In compact 4B, two adjacent lclusters are packed together as a unit to form on-disk indexes for effective random access, as below: (amortized = 4, vcnt = 2) _____________________________________________ |___@_____ encoded bits __________|_ blkaddr _| 0 . amortized * vcnt = 8 . . . . amortized * vcnt - 4 = 4 . . .____________________________. |_type (2 bits)_|_clusterofs_| Therefore, encoded bits for each pack are 32 bits (4 bytes). IOWs, since each lcluster can get 16 bits for its type and clusterofs, the maximum supported lclustersize for compact 4B format is 16k (14 bits). Fix this to enable compact 4B format for 16k lclusters (blocks), which is tested on an arm64 server with 16k page size. Fixes: 152a333a5895 ("staging: erofs: add compacted compression indexes support") Signed-off-by: Gao Xiang Link: https://lore.kernel.org/r/20230601112341.56960-1-hsiangkao@linux.alibaba.com Signed-off-by: Sasha Levin --- fs/erofs/zmap.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/fs/erofs/zmap.c b/fs/erofs/zmap.c index 3961bb55dea11..0337b70b2dac4 100644 --- a/fs/erofs/zmap.c +++ b/fs/erofs/zmap.c @@ -271,7 +271,7 @@ static int unpack_compacted_index(struct z_erofs_maprecorder *m, u8 *in, type; bool big_pcluster; - if (1 << amortizedshift == 4) + if (1 << amortizedshift == 4 && lclusterbits <= 14) vcnt = 2; else if (1 << amortizedshift == 2 && lclusterbits == 12) vcnt = 16; @@ -373,7 +373,6 @@ static int compacted_load_cluster_from_disk(struct z_erofs_maprecorder *m, { struct inode *const inode = m->inode; struct erofs_inode *const vi = EROFS_I(inode); - const unsigned int lclusterbits = vi->z_logical_clusterbits; const erofs_off_t ebase = sizeof(struct z_erofs_map_header) + ALIGN(erofs_iloc(inode) + vi->inode_isize + vi->xattr_isize, 8); const unsigned int totalidx = DIV_ROUND_UP(inode->i_size, EROFS_BLKSIZ); @@ -381,9 +380,6 @@ static int compacted_load_cluster_from_disk(struct z_erofs_maprecorder *m, unsigned int amortizedshift; erofs_off_t pos; - if (lclusterbits != 12) - return -EOPNOTSUPP; - if (lcn >= totalidx) return -EINVAL; -- 2.39.2