From patchwork Tue Sep 8 08:37:30 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Qu Wenruo X-Patchwork-Id: 7144191 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 A1D8DBEEC1 for ; Wed, 9 Sep 2015 05:09:19 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9EA5A2097D for ; Wed, 9 Sep 2015 05:09:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9167820970 for ; Wed, 9 Sep 2015 05:09:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752828AbbIIFFa (ORCPT ); Wed, 9 Sep 2015 01:05:30 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:48982 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1751793AbbIIFFZ (ORCPT ); Wed, 9 Sep 2015 01:05:25 -0400 X-IronPort-AV: E=Sophos;i="5.13,665,1427731200"; d="scan'208";a="49825039" Received: from unknown (HELO tang.cn.fujitsu.com) ([10.167.250.3]) by song.cn.fujitsu.com with ESMTP; 08 Sep 2015 16:38:32 +0800 Received: from localhost.localdomain (tang.cn.fujitsu.com [127.0.0.1]) by tang.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id t888dQvC019126 for ; Tue, 8 Sep 2015 16:39:44 +0800 From: Qu Wenruo To: linux-btrfs@vger.kernel.org Subject: [PATCH 13/19] btrfs: extent-tree: Add new verions of btrfs_check_data_free_space Date: Tue, 8 Sep 2015 16:37:30 +0800 Message-Id: <1441701456-8034-14-git-send-email-quwenruo@cn.fujitsu.com> X-Mailer: git-send-email 2.5.1 In-Reply-To: <1441701456-8034-1-git-send-email-quwenruo@cn.fujitsu.com> References: <1441701456-8034-1-git-send-email-quwenruo@cn.fujitsu.com> Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add new function __btrfs_check_data_free_space() to do precious space reservation. The new function will replace old btrfs_check_data_free_space(), but until all the change is done, let's just use the new name. Also, export internal use function btrfs_alloc_data_chunk_ondemand(), as now qgroup reserve requires precious bytes, which can only be got in later loop(like fallocate). But data space info check and data chunk allocate doesn't need to be that accurate, and can be called at the beginning. So export it for later operations. Signed-off-by: Qu Wenruo --- fs/btrfs/ctree.h | 2 ++ fs/btrfs/extent-tree.c | 50 +++++++++++++++++++++++++++++++++++++++++--------- 2 files changed, 43 insertions(+), 9 deletions(-) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index ae86025..c1a0aaf 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -3453,6 +3453,8 @@ enum btrfs_reserve_flush_enum { }; int btrfs_check_data_free_space(struct inode *inode, u64 bytes, u64 write_bytes); +int __btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len); +int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes); void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes); void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, struct btrfs_root *root); diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 402415c..61366ca 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -3907,11 +3907,7 @@ u64 btrfs_get_alloc_profile(struct btrfs_root *root, int data) return ret; } -/* - * This will check the space that the inode allocates from to make sure we have - * enough space for bytes. - */ -int btrfs_check_data_free_space(struct inode *inode, u64 bytes, u64 write_bytes) +int btrfs_alloc_data_chunk_ondemand(struct inode *inode, u64 bytes) { struct btrfs_space_info *data_sinfo; struct btrfs_root *root = BTRFS_I(inode)->root; @@ -4032,19 +4028,55 @@ commit_trans: data_sinfo->flags, bytes, 1); return -ENOSPC; } - ret = btrfs_qgroup_reserve(root, write_bytes); - if (ret) - goto out; data_sinfo->bytes_may_use += bytes; trace_btrfs_space_reservation(root->fs_info, "space_info", data_sinfo->flags, bytes, 1); -out: spin_unlock(&data_sinfo->lock); return ret; } /* + * This will check the space that the inode allocates from to make sure we have + * enough space for bytes. + */ +int btrfs_check_data_free_space(struct inode *inode, u64 bytes, u64 write_bytes) +{ + struct btrfs_root *root = BTRFS_I(inode)->root; + int ret; + + ret = btrfs_alloc_data_chunk_ondemand(inode, bytes); + if (ret < 0) + return ret; + ret = btrfs_qgroup_reserve(root, write_bytes); + return ret; +} + +/* + * New check_data_free_space() with ability for precious data reserveation + * Will replace old btrfs_check_data_free_space(), but for patch split, + * add a new function first and then replace it. + */ +int __btrfs_check_data_free_space(struct inode *inode, u64 start, u64 len) +{ + struct btrfs_root *root = BTRFS_I(inode)->root; + int ret; + + /* align the range */ + len = round_up(start + len, root->sectorsize) - + round_down(start, root->sectorsize); + start = round_down(start, root->sectorsize); + + ret = btrfs_alloc_data_chunk_ondemand(inode, len); + if (ret < 0) + return ret; + + /* Use new btrfs_qgroup_reserve_data to reserve precious data space */ + ret = btrfs_qgroup_reserve_data(inode, start, len); + return ret; +} + +/* * Called if we need to clear a data reservation for this inode. */ void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes)