From patchwork Mon Mar 23 10:10:42 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lin Ma X-Patchwork-Id: 453344 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 6EE9514016B for ; Mon, 23 Mar 2015 21:11:55 +1100 (AEDT) Authentication-Results: ozlabs.org; dkim=fail reason="verification failed; unprotected key" header.d=gmail.com header.i=@gmail.com header.b=TwLF16l9; dkim-adsp=none (unprotected policy); dkim-atps=neutral Received: from localhost ([::1]:54732 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YZzKr-0006Rz-K9 for incoming@patchwork.ozlabs.org; Mon, 23 Mar 2015 06:11:53 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48805) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YZzKP-0005ru-96 for qemu-devel@nongnu.org; Mon, 23 Mar 2015 06:11:26 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YZzKJ-0007DJ-IE for qemu-devel@nongnu.org; Mon, 23 Mar 2015 06:11:25 -0400 Received: from mail-pd0-x22c.google.com ([2607:f8b0:400e:c02::22c]:35269) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YZzKJ-0007D9-As for qemu-devel@nongnu.org; Mon, 23 Mar 2015 06:11:19 -0400 Received: by pdbop1 with SMTP id op1so183117762pdb.2 for ; Mon, 23 Mar 2015 03:11:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=XvkCsNrJ7NEztW+II5JAbY79bfetScWFm5T1LHPaay0=; b=TwLF16l9G4Fzod2RGRvgpSHz5wfOQ0A9pS1i+yw8HTEVY50w39c8nDIccYxZtI4QEa WcS6412OGpPwi82HgNmWB5t0sDRGTUfGup5bx+u7t6jGKohCOSDal5kP9qLvzn4qxisl wltthkupt/eDO1wERgUH8Mk521eMQwcFWalMOEvIp5ltud4Pfup05buwZP//2hzm8Og5 Zn7FfMDsHvNqpzVbxQp8LEMwDwL+7vNxVRkNsdEsBeBBqf3eTIvZvIzrwl5yUThhboB8 DLbb2DSFmrLT/QRn1yRSMeDTUs6WbMCnm3grxOb4UC8aY9cYr2cNLC7XsfsiDcBJLiKG zH1A== X-Received: by 10.68.129.170 with SMTP id nx10mr19824979pbb.16.1427105478534; Mon, 23 Mar 2015 03:11:18 -0700 (PDT) Received: from linux-wc25.site.apac.novell.com ([203.192.156.9]) by mx.google.com with ESMTPSA id zi5sm519616pbc.39.2015.03.23.03.11.16 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 23 Mar 2015 03:11:17 -0700 (PDT) From: Lin Ma To: qemu-devel@nongnu.org, imammedo@redhat.com Date: Mon, 23 Mar 2015 18:10:42 +0800 Message-Id: <1427105442-23484-2-git-send-email-lma@suse.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1427105442-23484-1-git-send-email-lma@suse.com> References: <1427105442-23484-1-git-send-email-lma@suse.com> X-detected-operating-system: by eggs.gnu.org: Error: Malformed IPv6 address (bad octet value). X-Received-From: 2607:f8b0:400e:c02::22c Cc: pbonzini@redhat.com, Lin Ma Subject: [Qemu-devel] [PATCH 2/2] memory-backend: Add can_be_deleted impl for ram-backend and file-backend X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org The can_be_deleted callback returns false if the backend is in used, Otherwise returns true. Signed-off-by: Lin Ma --- backends/hostmem-file.c | 12 ++++++++++++ backends/hostmem-ram.c | 12 ++++++++++++ 2 files changed, 24 insertions(+) diff --git a/backends/hostmem-file.c b/backends/hostmem-file.c index 5179994..33ad8e7 100644 --- a/backends/hostmem-file.c +++ b/backends/hostmem-file.c @@ -118,10 +118,22 @@ file_backend_instance_init(Object *o) set_mem_path, NULL); } +static bool +file_backend_can_be_deleted(Object *obj) +{ + MemoryRegion *mr; + mr = host_memory_backend_get_memory(MEMORY_BACKEND(obj), &error_abort); + if (memory_region_is_mapped(mr)) + return false; + else + return true; +} + static const TypeInfo file_backend_info = { .name = TYPE_MEMORY_BACKEND_FILE, .parent = TYPE_MEMORY_BACKEND, .class_init = file_backend_class_init, + .can_be_deleted = file_backend_can_be_deleted, .instance_init = file_backend_instance_init, .instance_size = sizeof(HostMemoryBackendFile), }; diff --git a/backends/hostmem-ram.c b/backends/hostmem-ram.c index a67a134..8724ad1 100644 --- a/backends/hostmem-ram.c +++ b/backends/hostmem-ram.c @@ -39,10 +39,22 @@ ram_backend_class_init(ObjectClass *oc, void *data) bc->alloc = ram_backend_memory_alloc; } +static bool +ram_backend_can_be_deleted(Object *obj) +{ + MemoryRegion *mr; + mr = host_memory_backend_get_memory(MEMORY_BACKEND(obj), &error_abort); + if (memory_region_is_mapped(mr)) + return false; + else + return true; +} + static const TypeInfo ram_backend_info = { .name = TYPE_MEMORY_BACKEND_RAM, .parent = TYPE_MEMORY_BACKEND, .class_init = ram_backend_class_init, + .can_be_deleted = ram_backend_can_be_deleted, }; static void register_types(void)