From patchwork Sun Oct 2 13:24:19 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chandan Rajendra X-Patchwork-Id: 9359647 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id DA7C9600C8 for ; Sun, 2 Oct 2016 13:25:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CA14C28A46 for ; Sun, 2 Oct 2016 13:25:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BE6B528AB4; Sun, 2 Oct 2016 13:25:54 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1E84F28A46 for ; Sun, 2 Oct 2016 13:25:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751949AbcJBNZv (ORCPT ); Sun, 2 Oct 2016 09:25:51 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:51718 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751802AbcJBNZt (ORCPT ); Sun, 2 Oct 2016 09:25:49 -0400 Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.17/8.16.0.17) with SMTP id u92DNFJL005072 for ; Sun, 2 Oct 2016 09:25:48 -0400 Received: from e38.co.us.ibm.com (e38.co.us.ibm.com [32.97.110.159]) by mx0b-001b2d01.pphosted.com with ESMTP id 25tkbgw8gn-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Sun, 02 Oct 2016 09:25:48 -0400 Received: from localhost by e38.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Sun, 2 Oct 2016 07:25:44 -0600 Received: from b03cxnp08027.gho.boulder.ibm.com (b03cxnp08027.gho.boulder.ibm.com [9.17.130.19]) by d03dlp02.boulder.ibm.com (Postfix) with ESMTP id A65E53E40030; Sun, 2 Oct 2016 07:25:43 -0600 (MDT) Received: from b03ledav003.gho.boulder.ibm.com (b03ledav003.gho.boulder.ibm.com [9.17.130.234]) by b03cxnp08027.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u92DPhAJ7864756; Sun, 2 Oct 2016 06:25:43 -0700 Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 79ADF6A043; Sun, 2 Oct 2016 07:25:43 -0600 (MDT) Received: from localhost.in.ibm.com (unknown [9.79.217.200]) by b03ledav003.gho.boulder.ibm.com (Postfix) with ESMTP id 8EB546A03C; Sun, 2 Oct 2016 07:25:41 -0600 (MDT) From: Chandan Rajendra To: clm@fb.com, jbacik@fb.com, dsterba@suse.com Cc: Chandan Rajendra , linux-btrfs@vger.kernel.org Subject: [PATCH V21 10/19] Btrfs: subpage-blocksize: Allow mounting filesystems where sectorsize < PAGE_SIZE Date: Sun, 2 Oct 2016 18:54:19 +0530 X-Mailer: git-send-email 2.5.5 In-Reply-To: <1475414668-25954-1-git-send-email-chandan@linux.vnet.ibm.com> References: <1475414668-25954-1-git-send-email-chandan@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16100213-0028-0000-0000-000005B9ADBC X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00005841; HX=3.00000240; KW=3.00000007; PH=3.00000004; SC=3.00000186; SDB=6.00763599; UDB=6.00364349; IPR=6.00539010; BA=6.00004776; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009; ZB=6.00000000; ZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00012850; XFM=3.00000011; UTC=2016-10-02 13:25:45 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16100213-0029-0000-0000-00002FB51B86 Message-Id: <1475414668-25954-11-git-send-email-chandan@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-10-02_05:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=2 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1609280000 definitions=main-1610020247 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This commit allows mounting filesystem instances with sectorsize smaller than the PAGE_SIZE. Since the code assumes that the super block is either equal to or larger than sectorsize, this commit brings back the nodesize argument for btrfs_find_create_tree_block() function. This change allows us to be able to mount and use filesystems with 2048 bytes as the sectorsize. Signed-off-by: Chandan Rajendra --- fs/btrfs/disk-io.c | 21 ++++++++------------- fs/btrfs/disk-io.h | 2 +- fs/btrfs/extent-tree.c | 4 ++-- fs/btrfs/extent_io.c | 3 +-- fs/btrfs/extent_io.h | 2 +- fs/btrfs/tree-log.c | 2 +- fs/btrfs/volumes.c | 10 +++------- 7 files changed, 17 insertions(+), 27 deletions(-) diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 5663481..2684438 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -936,7 +936,7 @@ void readahead_tree_block(struct btrfs_root *root, u64 bytenr) { struct extent_buffer *buf = NULL; - buf = btrfs_find_create_tree_block(root, bytenr); + buf = btrfs_find_create_tree_block(root, bytenr, root->nodesize); if (IS_ERR(buf)) return; read_extent_buffer_pages(buf, WAIT_NONE, 0); @@ -949,7 +949,7 @@ int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, struct extent_buffer *buf = NULL; int ret; - buf = btrfs_find_create_tree_block(root, bytenr); + buf = btrfs_find_create_tree_block(root, bytenr, root->nodesize); if (IS_ERR(buf)) return 0; @@ -979,12 +979,12 @@ struct extent_buffer *btrfs_find_tree_block(struct btrfs_fs_info *fs_info, } struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, - u64 bytenr) + u64 bytenr, u32 blocksize) { if (btrfs_is_testing(root->fs_info)) return alloc_test_extent_buffer(root->fs_info->eb_info, bytenr, - root->nodesize); - return alloc_extent_buffer(root->fs_info, bytenr); + blocksize); + return alloc_extent_buffer(root->fs_info, bytenr, blocksize); } @@ -1006,7 +1006,7 @@ struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, struct extent_buffer *buf = NULL; int ret; - buf = btrfs_find_create_tree_block(root, bytenr); + buf = btrfs_find_create_tree_block(root, bytenr, root->nodesize); if (IS_ERR(buf)) return buf; @@ -3891,17 +3891,12 @@ 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_SIZE) { - printk(KERN_ERR "BTRFS: sectorsize %llu not supported yet, only support %lu\n", - sectorsize, PAGE_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); diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h index 591f078..5f6263e 100644 --- a/fs/btrfs/disk-io.h +++ b/fs/btrfs/disk-io.h @@ -50,7 +50,7 @@ void readahead_tree_block(struct btrfs_root *root, u64 bytenr); int reada_tree_block_flagged(struct btrfs_root *root, u64 bytenr, int mirror_num, struct extent_buffer **eb); struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, - u64 bytenr); + u64 bytenr, u32 blocksize); void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info, struct extent_buffer *buf); int open_ctree(struct super_block *sb, diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 03da2f6..25fbfa2 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -8238,7 +8238,7 @@ btrfs_init_new_buffer(struct btrfs_trans_handle *trans, struct btrfs_root *root, { struct extent_buffer *buf; - buf = btrfs_find_create_tree_block(root, bytenr); + buf = btrfs_find_create_tree_block(root, bytenr, root->nodesize); if (IS_ERR(buf)) return buf; @@ -8885,7 +8885,7 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans, next = btrfs_find_tree_block(root->fs_info, bytenr); if (!next) { - next = btrfs_find_create_tree_block(root, bytenr); + next = btrfs_find_create_tree_block(root, bytenr, blocksize); if (IS_ERR(next)) return PTR_ERR(next); diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 8ace367..9af8237 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -5113,9 +5113,8 @@ free_eb: #endif struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info, - u64 start) + u64 start, unsigned long len) { - unsigned long len = fs_info->tree_root->nodesize; unsigned long num_pages = num_extent_pages(start, len); unsigned long i; struct extent_buffer *eb; diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 6a02343..ad5b000 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -430,7 +430,7 @@ int clear_page_blks_state(struct page *page, unsigned long blk_states, int test_page_blks_state(struct page *page, enum blk_state blk_state, u64 start, u64 end, int check_all); struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info, - u64 start); + u64 start, unsigned long len); struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_eb_info *eb_info, u64 start, unsigned long len); struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src); diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index a25be18b..bc5e0c1 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -2421,7 +2421,7 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans, parent = path->nodes[*level]; root_owner = btrfs_header_owner(parent); - next = btrfs_find_create_tree_block(root, bytenr); + next = btrfs_find_create_tree_block(root, bytenr, blocksize); if (IS_ERR(next)) return PTR_ERR(next); diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 89dc9c7..3994ab9 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -6664,15 +6664,11 @@ int btrfs_read_sys_array(struct btrfs_root *root) u64 type; struct btrfs_key key; - ASSERT(BTRFS_SUPER_INFO_SIZE <= root->nodesize); - /* - * This will create extent buffer of nodesize, superblock size is - * fixed to BTRFS_SUPER_INFO_SIZE. If nodesize > sb size, this will - * overallocate but we can keep it as-is, only the first page is used. - */ - sb = btrfs_find_create_tree_block(root, BTRFS_SUPER_INFO_OFFSET); + sb = btrfs_find_create_tree_block(root, BTRFS_SUPER_INFO_OFFSET, + BTRFS_SUPER_INFO_SIZE); if (IS_ERR(sb)) return PTR_ERR(sb); + set_extent_buffer_uptodate(sb); btrfs_set_buffer_lockdep_class(root->root_key.objectid, sb, 0); /*