From patchwork Thu Nov 4 10:38:45 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hanna Czenczek X-Patchwork-Id: 12602817 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id BB864C433F5 for ; Thu, 4 Nov 2021 10:41:34 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 87247611C9 for ; Thu, 4 Nov 2021 10:41:34 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 87247611C9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:37130 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1miaBZ-0006m5-G3 for qemu-devel@archiver.kernel.org; Thu, 04 Nov 2021 06:41:33 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:56356) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mia9m-0004Zh-VL for qemu-devel@nongnu.org; Thu, 04 Nov 2021 06:39:43 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:46553) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mia9l-0006vc-25 for qemu-devel@nongnu.org; Thu, 04 Nov 2021 06:39:42 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1636022380; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=hGEGeFVzWLkPnTQJG9D/IwiYUT2c8nEAkpAE7miUqxw=; b=CGX1wtu5tZAr130vp9fpeiKdBnGBSWpEzoA3bAHnPs6Cm3Ly+bwzhtgTUbTbMUEP5MNVce lOfrc3MYft7Bd2SshITKXfcnSa7MY0xXTLeNT97cirvbMUrquRjbryTkI6gs+wiBlQIYuW rk4ElvV+vMGAOH6P8n4YRlVCapOFaWk= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-437-8DDSh_tVOn6v14WtH_AUYg-1; Thu, 04 Nov 2021 06:39:39 -0400 X-MC-Unique: 8DDSh_tVOn6v14WtH_AUYg-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 6489110A8E01; Thu, 4 Nov 2021 10:39:38 +0000 (UTC) Received: from localhost (unknown [10.39.192.248]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 00BCF607A4; Thu, 4 Nov 2021 10:39:30 +0000 (UTC) From: Hanna Reitz To: qemu-block@nongnu.org Subject: [PATCH 3/7] block: Unite remove_empty_child and child_free Date: Thu, 4 Nov 2021 11:38:45 +0100 Message-Id: <20211104103849.46855-4-hreitz@redhat.com> In-Reply-To: <20211104103849.46855-1-hreitz@redhat.com> References: <20211104103849.46855-1-hreitz@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=hreitz@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=hreitz@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.717, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Hanna Reitz , Vladimir Sementsov-Ogievskiy , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Now that bdrv_remove_empty_child() no longer removes the child from the parent's children list but only checks that it is not in such a list, it is only a wrapper around bdrv_child_free() that checks that the child is empty and unused. That should apply to all children that we free, so put those checks into bdrv_child_free() and drop bdrv_remove_empty_child(). Signed-off-by: Hanna Reitz Reviewed-by: Vladimir Sementsov-Ogievskiy --- block.c | 26 +++++++++++++------------- 1 file changed, 13 insertions(+), 13 deletions(-) diff --git a/block.c b/block.c index 243ae206b5..b95f8dcf8f 100644 --- a/block.c +++ b/block.c @@ -2740,19 +2740,19 @@ static void bdrv_replace_child_noperm(BdrvChild *child, } } -static void bdrv_child_free(void *opaque) -{ - BdrvChild *c = opaque; - - g_free(c->name); - g_free(c); -} - -static void bdrv_remove_empty_child(BdrvChild *child) +/** + * Free the given @child. + * + * The child must be empty (i.e. `child->bs == NULL`) and it must be + * unused (i.e. not in a children list). + */ +static void bdrv_child_free(BdrvChild *child) { assert(!child->bs); assert(!child->next.le_prev); /* not in children list */ - bdrv_child_free(child); + + g_free(child->name); + g_free(child); } typedef struct BdrvAttachChildCommonState { @@ -2786,7 +2786,7 @@ static void bdrv_attach_child_common_abort(void *opaque) } bdrv_unref(bs); - bdrv_remove_empty_child(child); + bdrv_child_free(child); *s->child = NULL; } @@ -2859,7 +2859,7 @@ static int bdrv_attach_child_common(BlockDriverState *child_bs, if (ret < 0) { error_propagate(errp, local_err); - bdrv_remove_empty_child(new_child); + bdrv_child_free(new_child); return ret; } } @@ -2930,7 +2930,7 @@ static void bdrv_detach_child(BdrvChild *child) BlockDriverState *old_bs = child->bs; bdrv_replace_child_noperm(child, NULL); - bdrv_remove_empty_child(child); + bdrv_child_free(child); if (old_bs) { /*