From patchwork Wed Nov 28 03:11:38 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Su Yue X-Patchwork-Id: 10701739 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 098CD181D for ; Wed, 28 Nov 2018 03:04:31 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id EEC96289FA for ; Wed, 28 Nov 2018 03:04:30 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E35FD2C85C; Wed, 28 Nov 2018 03:04:30 +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=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, 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 94DE3289FA for ; Wed, 28 Nov 2018 03:04:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727237AbeK1OER (ORCPT ); Wed, 28 Nov 2018 09:04:17 -0500 Received: from mail.cn.fujitsu.com ([183.91.158.132]:19247 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727207AbeK1OEQ (ORCPT ); Wed, 28 Nov 2018 09:04:16 -0500 X-IronPort-AV: E=Sophos;i="5.56,289,1539619200"; d="scan'208";a="48766246" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 28 Nov 2018 11:04:14 +0800 Received: from G08CNEXCHPEKD01.g08.fujitsu.local (unknown [10.167.33.80]) by cn.fujitsu.com (Postfix) with ESMTP id 7D5FC4B7349C for ; Wed, 28 Nov 2018 11:04:11 +0800 (CST) Received: from localhost.localdomain (10.167.226.22) by G08CNEXCHPEKD01.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.408.0; Wed, 28 Nov 2018 11:04:16 +0800 From: Su Yue To: CC: Subject: [RFC PATCH 07/17] btrfs: priority alloc: add functions to remove block group from priority tree Date: Wed, 28 Nov 2018 11:11:38 +0800 Message-ID: <20181128031148.357-8-suy.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181128031148.357-1-suy.fnst@cn.fujitsu.com> References: <20181128031148.357-1-suy.fnst@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.22] X-yoursite-MailScanner-ID: 7D5FC4B7349C.AA45B X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: suy.fnst@cn.fujitsu.com 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 Introduce btrfs_remove_block_group_priority() to remove block group from priority tree. Signed-off-by: Su Yue --- fs/btrfs/extent-tree.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 5bae757786dc..b559c9a9afc6 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -11429,3 +11429,40 @@ static void add_block_group_priority(struct btrfs_block_group_cache *cache) up_write(&pt->groups_sem); BUG_ON(ret); } + +static void unlink_block_group_priority(struct btrfs_priority_tree *pt, + struct btrfs_block_group_cache *cache) +{ + rb_erase(&cache->node, &pt->block_groups); + RB_CLEAR_NODE(&cache->node); +} + +void btrfs_remove_block_group_priority(struct btrfs_block_group_cache *cache) +{ + struct btrfs_priority_tree *pt; + + if (!is_priority_alloc_enabled(cache->fs_info)) + return; + + spin_lock(&cache->lock); + if (cache->priority_tree == NULL) { + spin_unlock(&cache->lock); + return; + } + + pt = cache->priority_tree; + cache->priority = PRIORITY_BG_DELETED; + spin_unlock(&cache->lock); + + down_write(&pt->groups_sem); + spin_lock(&cache->lock); + + if (cache->priority_tree == NULL) + goto out; + + unlink_block_group_priority(pt, cache); + cache->priority_tree = NULL; +out: + spin_unlock(&cache->lock); + up_write(&pt->groups_sem); +}