From patchwork Fri Jan 29 05:03:17 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qu Wenruo X-Patchwork-Id: 8158951 Return-Path: X-Original-To: patchwork-linux-btrfs@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id D20FDBEEE5 for ; Fri, 29 Jan 2016 05:17:09 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C49782035D for ; Fri, 29 Jan 2016 05:17:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B3794200DE for ; Fri, 29 Jan 2016 05:17:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752064AbcA2FRD (ORCPT ); Fri, 29 Jan 2016 00:17:03 -0500 Received: from cn.fujitsu.com ([222.73.24.84]:21967 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1751867AbcA2FRC (ORCPT ); Fri, 29 Jan 2016 00:17:02 -0500 X-IronPort-AV: E=Sophos;i="5.20,367,1444665600"; d="scan'208";a="304663" Received: from unknown (HELO cn.fujitsu.com) ([10.167.250.3]) by song.cn.fujitsu.com with ESMTP; 29 Jan 2016 13:05:46 +0800 Received: from localhost.localdomain (unknown [10.167.226.34]) by cn.fujitsu.com (Postfix) with ESMTP id 9D9E44056408; Fri, 29 Jan 2016 13:05:33 +0800 (CST) From: Qu Wenruo To: linux-btrfs@vger.kernel.org Cc: dsterba@suse.cz, David Sterba Subject: [PATCH v3 07/22] btrfs-progs: Introduce function to setup temporary chunk root Date: Fri, 29 Jan 2016 13:03:17 +0800 Message-Id: <1454043812-7893-8-git-send-email-quwenruo@cn.fujitsu.com> X-Mailer: git-send-email 2.7.0 In-Reply-To: <1454043812-7893-1-git-send-email-quwenruo@cn.fujitsu.com> References: <1454043812-7893-1-git-send-email-quwenruo@cn.fujitsu.com> MIME-Version: 1.0 X-yoursite-MailScanner-ID: 9D9E44056408.AB669 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: quwenruo@cn.fujitsu.com X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Introduce new function, setup_temp_chunk_root(), to initialize temporary chunk root for make_btrfs_v2(). Signed-off-by: Qu Wenruo Signed-off-by: David Sterba --- utils.c | 171 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 171 insertions(+) diff --git a/utils.c b/utils.c index 0b5df7e..65bb11f 100644 --- a/utils.c +++ b/utils.c @@ -434,6 +434,173 @@ out: return ret; } +static int insert_temp_dev_item(int fd, struct extent_buffer *buf, + struct btrfs_mkfs_config *cfg, + int *slot, u32 *itemoff) +{ + struct btrfs_disk_key disk_key; + struct btrfs_dev_item *dev_item; + char super_buf[BTRFS_SUPER_INFO_SIZE]; + unsigned char dev_uuid[BTRFS_UUID_SIZE]; + unsigned char fsid[BTRFS_FSID_SIZE]; + struct btrfs_super_block *super = (struct btrfs_super_block *)super_buf; + int ret; + + ret = pread(fd, super_buf, BTRFS_SUPER_INFO_SIZE, cfg->super_bytenr); + if (ret < BTRFS_SUPER_INFO_SIZE) { + ret = (ret < 0 ? -errno : -EIO); + goto out; + } + + btrfs_set_header_nritems(buf, *slot + 1); + (*itemoff) -= sizeof(*dev_item); + /* setup device item 1, 0 is for replace case */ + btrfs_set_disk_key_type(&disk_key, BTRFS_DEV_ITEM_KEY); + btrfs_set_disk_key_objectid(&disk_key, BTRFS_DEV_ITEMS_OBJECTID); + btrfs_set_disk_key_offset(&disk_key, 1); + btrfs_set_item_key(buf, &disk_key, *slot); + btrfs_set_item_offset(buf, btrfs_item_nr(*slot), *itemoff); + btrfs_set_item_size(buf, btrfs_item_nr(*slot), sizeof(*dev_item)); + + dev_item = btrfs_item_ptr(buf, *slot, struct btrfs_dev_item); + /* Generate device uuid */ + uuid_generate(dev_uuid); + write_extent_buffer(buf, dev_uuid, + (unsigned long)btrfs_device_uuid(dev_item), + BTRFS_UUID_SIZE); + uuid_parse(cfg->fs_uuid, fsid); + write_extent_buffer(buf, fsid, + (unsigned long)btrfs_device_fsid(dev_item), + BTRFS_FSID_SIZE); + btrfs_set_device_id(buf, dev_item, 1); + btrfs_set_device_generation(buf, dev_item, 0); + btrfs_set_device_total_bytes(buf, dev_item, cfg->num_bytes); + /* + * The number must match the initial SYSTEM and META chunk size + */ + btrfs_set_device_bytes_used(buf, dev_item, + BTRFS_MKFS_SYSTEM_GROUP_SIZE + + BTRFS_CONVERT_META_GROUP_SIZE); + btrfs_set_device_io_align(buf, dev_item, cfg->sectorsize); + btrfs_set_device_io_width(buf, dev_item, cfg->sectorsize); + btrfs_set_device_sector_size(buf, dev_item, cfg->sectorsize); + btrfs_set_device_type(buf, dev_item, 0); + + /* Super dev_item is not complete, copy the complete one to sb */ + read_extent_buffer(buf, &super->dev_item, (unsigned long)dev_item, + sizeof(*dev_item)); + ret = write_temp_super(fd, super, cfg->super_bytenr); + (*slot)++; +out: + return ret; +} + +static int insert_temp_chunk_item(int fd, struct extent_buffer *buf, + struct btrfs_mkfs_config *cfg, + int *slot, u32 *itemoff, u64 start, u64 len, + u64 type) +{ + struct btrfs_chunk *chunk; + struct btrfs_disk_key disk_key; + char super_buf[BTRFS_SUPER_INFO_SIZE]; + struct btrfs_super_block *sb = (struct btrfs_super_block *)super_buf; + int ret = 0; + + ret = pread(fd, super_buf, BTRFS_SUPER_INFO_SIZE, + cfg->super_bytenr); + if (ret < BTRFS_SUPER_INFO_SIZE) { + ret = (ret < 0 ? ret : -EIO); + return ret; + } + + btrfs_set_header_nritems(buf, *slot + 1); + (*itemoff) -= btrfs_chunk_item_size(1); + btrfs_set_disk_key_type(&disk_key, BTRFS_CHUNK_ITEM_KEY); + btrfs_set_disk_key_objectid(&disk_key, BTRFS_FIRST_CHUNK_TREE_OBJECTID); + btrfs_set_disk_key_offset(&disk_key, start); + btrfs_set_item_key(buf, &disk_key, *slot); + btrfs_set_item_offset(buf, btrfs_item_nr(*slot), *itemoff); + btrfs_set_item_size(buf, btrfs_item_nr(*slot), + btrfs_chunk_item_size(1)); + + chunk = btrfs_item_ptr(buf, *slot, struct btrfs_chunk); + btrfs_set_chunk_length(buf, chunk, len); + btrfs_set_chunk_owner(buf, chunk, BTRFS_EXTENT_TREE_OBJECTID); + btrfs_set_chunk_stripe_len(buf, chunk, 64 * 1024); + btrfs_set_chunk_type(buf, chunk, type); + btrfs_set_chunk_io_align(buf, chunk, cfg->sectorsize); + btrfs_set_chunk_io_width(buf, chunk, cfg->sectorsize); + btrfs_set_chunk_sector_size(buf, chunk, cfg->sectorsize); + btrfs_set_chunk_num_stripes(buf, chunk, 1); + /* TODO: Support DUP profile for system chunk */ + btrfs_set_stripe_devid_nr(buf, chunk, 0, 1); + /* We are doing 1:1 mapping, so start is its dev offset */ + btrfs_set_stripe_offset_nr(buf, chunk, 0, start); + write_extent_buffer(buf, &sb->dev_item.uuid, + (unsigned long)btrfs_stripe_dev_uuid_nr(chunk, 0), + BTRFS_UUID_SIZE); + (*slot)++; + + /* + * If it's system chunk, also copy it to super block. + */ + if (type & BTRFS_BLOCK_GROUP_SYSTEM) { + char *cur; + + cur = (char *)sb->sys_chunk_array + sb->sys_chunk_array_size; + memcpy(cur, &disk_key, sizeof(disk_key)); + cur += sizeof(disk_key); + read_extent_buffer(buf, cur, (unsigned long int)chunk, + btrfs_chunk_item_size(1)); + sb->sys_chunk_array_size += btrfs_chunk_item_size(1) + + sizeof(disk_key); + + ret = write_temp_super(fd, sb, cfg->super_bytenr); + } + return ret; +} + +static int setup_temp_chunk_tree(int fd, struct btrfs_mkfs_config *cfg, + u64 sys_chunk_start, u64 meta_chunk_start, + u64 chunk_bytenr) +{ + struct extent_buffer *buf = NULL; + u32 itemoff = __BTRFS_LEAF_DATA_SIZE(cfg->nodesize); + int slot = 0; + int ret; + + /* Must ensure SYS chunk starts before META chunk */ + BUG_ON(meta_chunk_start < sys_chunk_start); + buf = malloc(sizeof(*buf) + cfg->nodesize); + if (!buf) + return -ENOMEM; + ret = setup_temp_extent_buffer(buf, cfg, chunk_bytenr, + BTRFS_CHUNK_TREE_OBJECTID); + if (ret < 0) + goto out; + + ret = insert_temp_dev_item(fd, buf, cfg, &slot, &itemoff); + if (ret < 0) + goto out; + ret = insert_temp_chunk_item(fd, buf, cfg, &slot, &itemoff, + sys_chunk_start, + BTRFS_MKFS_SYSTEM_GROUP_SIZE, + BTRFS_BLOCK_GROUP_SYSTEM); + if (ret < 0) + goto out; + ret = insert_temp_chunk_item(fd, buf, cfg, &slot, &itemoff, + meta_chunk_start, + BTRFS_CONVERT_META_GROUP_SIZE, + BTRFS_BLOCK_GROUP_METADATA); + if (ret < 0) + goto out; + ret = write_temp_extent_buffer(fd, buf, chunk_bytenr); + +out: + free(buf); + return ret; +} + /* * Improved version of make_btrfs(). * @@ -524,6 +691,10 @@ static int make_convert_btrfs(int fd, struct btrfs_mkfs_config *cfg, dev_bytenr, fs_bytenr, csum_bytenr); if (ret < 0) goto out; + ret = setup_temp_chunk_tree(fd, cfg, sys_chunk_start, meta_chunk_start, + chunk_bytenr); + if (ret < 0) + goto out; out: return ret;