From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 14214C35242 for ; Fri, 24 Jan 2020 14:33:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DBEBB20661 for ; Fri, 24 Jan 2020 14:33:45 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=toxicpanda-com.20150623.gappssmtp.com header.i=@toxicpanda-com.20150623.gappssmtp.com header.b="Z7hImNwU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404575AbgAXOdo (ORCPT ); Fri, 24 Jan 2020 09:33:44 -0500 Received: from mail-qt1-f195.google.com ([209.85.160.195]:36559 "EHLO mail-qt1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404547AbgAXOdm (ORCPT ); Fri, 24 Jan 2020 09:33:42 -0500 Received: by mail-qt1-f195.google.com with SMTP id t13so1233975qto.3 for ; Fri, 24 Jan 2020 06:33:42 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=toxicpanda-com.20150623.gappssmtp.com; s=20150623; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=3pyxPNY94oOXrEeZK2hUi64+WTr11ylLgHcJGK8aNDE=; b=Z7hImNwUK/4FaxbLR2CvrLfaN1Il2rKZRnwcOzAE5+iRLA6Vp1+wvzL9GM+hTbD2LE v/3gpZvh2oSwttW3VmYYwyiwsFX+1qJ9VsBL+CqGp0PVoBhRiFCe9owW6/iV+HtMJyKn jtv4IVBbOMh0amtKcYyVEjh+RedMujv4ay9KIwBOAzuJl5KAk4JzxEGso/l0ROl/iaLG JVRmlDIg53V+/v79va9s3ZDidtmoqDG9IqQFb67Ghll0szP2nufQK3eS1HQKsxjNYGrP jMiHrN1Znoc6GO4/xNyoEtI4pg+RWCluq7jIQjs7zo8eb9/0CmqQ7Wh1oh2M9j0wbEUf Dp7A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=3pyxPNY94oOXrEeZK2hUi64+WTr11ylLgHcJGK8aNDE=; b=lR4qtYTl66XLhpaHgn4EXWuR1LE89sVn0l1FY5Ras1YBQH8SrEx29joqXmX0aieG3Z uGIK+jo3ItlGgQZkX6WKLi/gwQVj8njKxNEyIuA7ibACocPciJ8SQAJ/PecVK8YXvfIk vW8D5vXnwKsHDlAAb5dDFJFND+F9QNLTSKJ8dHeqLqJF8OSRiHxCBdaIOiPtnekd3xgx 8GJIi9EoXWi7ze+z1W0yRx0LcYEMwNk/wsIze/LTgjRQIj16v817hbwhinRToWNF5Y4W S4p+hZ0P11mnlyvdtT866EQZl7cpIw4zNPG4upnHjja75cjcDs48rYea+ioDD31eHgoC WKIA== X-Gm-Message-State: APjAAAVa0vTAqypNWp2qkuwo01cMkE4LXGz/zJ4Aoqd2wNOglfKe3J30 Ffh3+VuOWXuy/d/jmnNg6U6Jrw== X-Google-Smtp-Source: APXvYqwSkKoIZOC7wuy5NLmuoNKeEP96bcv4eoin5FMJ613LlFq9Md/0qNLf82/sroFUAOZlQj9mAg== X-Received: by 2002:ac8:5313:: with SMTP id t19mr2448490qtn.375.1579876421456; Fri, 24 Jan 2020 06:33:41 -0800 (PST) Received: from localhost ([107.15.81.208]) by smtp.gmail.com with ESMTPSA id l17sm3092912qkk.22.2020.01.24.06.33.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Jan 2020 06:33:40 -0800 (PST) From: Josef Bacik To: kernel-team@fb.com, linux-btrfs@vger.kernel.org Subject: [PATCH 23/44] btrfs: hold a ref on the root in merge_reloc_roots Date: Fri, 24 Jan 2020 09:32:40 -0500 Message-Id: <20200124143301.2186319-24-josef@toxicpanda.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200124143301.2186319-1-josef@toxicpanda.com> References: <20200124143301.2186319-1-josef@toxicpanda.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org We look up the corresponding root for the reloc root, we need to hold a ref while we're messing with it. Signed-off-by: Josef Bacik --- fs/btrfs/relocation.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 53df57b59bc3..79430a4245b5 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -2546,10 +2546,13 @@ void merge_reloc_roots(struct reloc_control *rc) if (btrfs_root_refs(&reloc_root->root_item) > 0) { root = read_fs_root(fs_info, reloc_root->root_key.offset); + if (!btrfs_grab_fs_root(root)) + BUG(); BUG_ON(IS_ERR(root)); BUG_ON(root->reloc_root != reloc_root); ret = merge_reloc_root(rc, root); + btrfs_put_fs_root(root); if (ret) { if (list_empty(&reloc_root->root_list)) list_add_tail(&reloc_root->root_list, -- 2.24.1