From mboxrd@z Thu Jan 1 00:00:00 1970 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) Sender: Lin Ma From: Lin Ma Date: Mon, 23 Mar 2015 18:10:42 +0800 Message-Id: <1427105442-23484-2-git-send-email-lma@suse.com> In-Reply-To: <1427105442-23484-1-git-send-email-lma@suse.com> References: <1427105442-23484-1-git-send-email-lma@suse.com> Subject: [Qemu-devel] [PATCH 2/2] memory-backend: Add can_be_deleted impl for ram-backend and file-backend List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, imammedo@redhat.com Cc: pbonzini@redhat.com, Lin Ma 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) -- 2.1.4