From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e23smtp07.au.ibm.com ([202.81.31.140]:59767 "EHLO e23smtp07.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750885AbcBKRtU (ORCPT ); Thu, 11 Feb 2016 12:49:20 -0500 Received: from localhost by e23smtp07.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 12 Feb 2016 03:49:17 +1000 Received: from d23relay07.au.ibm.com (d23relay07.au.ibm.com [9.190.26.37]) by d23dlp03.au.ibm.com (Postfix) with ESMTP id 5CEF53578056 for ; Fri, 12 Feb 2016 04:49:15 +1100 (EST) Received: from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97]) by d23relay07.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u1BHn2lv43122824 for ; Fri, 12 Feb 2016 04:49:10 +1100 Received: from d23av03.au.ibm.com (localhost [127.0.0.1]) by d23av03.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u1BHmgCJ021343 for ; Fri, 12 Feb 2016 04:48:43 +1100 From: Chandan Rajendra To: clm@fb.com, jbacik@fb.com, bo.li.liu@oracle.com, dsterba@suse.cz Cc: Chandan Rajendra , linux-btrfs@vger.kernel.org, chandan@mykolab.com Subject: [PATCH V15 07/15] Btrfs: subpage-blocksize: Allow mounting filesystems where sectorsize != PAGE_SIZE Date: Thu, 11 Feb 2016 23:17:45 +0530 Message-Id: <1455212873-14829-8-git-send-email-chandan@linux.vnet.ibm.com> In-Reply-To: <1455212873-14829-1-git-send-email-chandan@linux.vnet.ibm.com> References: <1455212873-14829-1-git-send-email-chandan@linux.vnet.ibm.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: This patch allows mounting filesystems with blocksize smaller than the PAGE_SIZE. Signed-off-by: Chandan Rajendra --- fs/btrfs/disk-io.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index ea540ba..07ccae3 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -4095,17 +4095,12 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, * Check sectorsize and nodesize first, other check will need it. * Check all possible sectorsize(4K, 8K, 16K, 32K, 64K) here. */ - if (!is_power_of_2(sectorsize) || sectorsize < 4096 || + if (!is_power_of_2(sectorsize) || sectorsize < 2048 || sectorsize > BTRFS_MAX_METADATA_BLOCKSIZE) { printk(KERN_ERR "BTRFS: invalid sectorsize %llu\n", sectorsize); ret = -EINVAL; } - /* Only PAGE SIZE is supported yet */ - if (sectorsize != PAGE_CACHE_SIZE) { - printk(KERN_ERR "BTRFS: sectorsize %llu not supported yet, only support %lu\n", - sectorsize, PAGE_CACHE_SIZE); - ret = -EINVAL; - } + if (!is_power_of_2(nodesize) || nodesize < sectorsize || nodesize > BTRFS_MAX_METADATA_BLOCKSIZE) { printk(KERN_ERR "BTRFS: invalid nodesize %llu\n", nodesize); @@ -4129,6 +4124,7 @@ static int btrfs_check_super_valid(struct btrfs_fs_info *fs_info, btrfs_super_chunk_root(sb)); ret = -EINVAL; } + if (!IS_ALIGNED(btrfs_super_log_root(sb), sectorsize)) { printk(KERN_WARNING "BTRFS: log_root block unaligned: %llu\n", btrfs_super_log_root(sb)); -- 2.1.0