From patchwork Wed Apr 27 10:05:05 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= X-Patchwork-Id: 8954571 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 263CE9F65D for ; Wed, 27 Apr 2016 10:14:38 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5933620259 for ; Wed, 27 Apr 2016 10:14:37 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 33D9B2011D for ; Wed, 27 Apr 2016 10:14:36 +0000 (UTC) Received: from localhost ([::1]:42298 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1avMUN-0004Wr-D4 for patchwork-qemu-devel@patchwork.kernel.org; Wed, 27 Apr 2016 06:14:35 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48566) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1avMLx-0005hA-QV for qemu-devel@nongnu.org; Wed, 27 Apr 2016 06:05:57 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1avMLr-0004YC-GH for qemu-devel@nongnu.org; Wed, 27 Apr 2016 06:05:53 -0400 Received: from mx1.redhat.com ([209.132.183.28]:59849) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1avMLr-0004Xm-16 for qemu-devel@nongnu.org; Wed, 27 Apr 2016 06:05:47 -0400 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B52632EE for ; Wed, 27 Apr 2016 10:05:46 +0000 (UTC) Received: from t530wlan.home.berrange.com.com (vpn1-6-18.ams2.redhat.com [10.36.6.18]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u3RA5MRO030816; Wed, 27 Apr 2016 06:05:45 -0400 From: "Daniel P. Berrange" To: qemu-devel@nongnu.org Date: Wed, 27 Apr 2016 11:05:05 +0100 Message-Id: <1461751518-12128-16-git-send-email-berrange@redhat.com> In-Reply-To: <1461751518-12128-1-git-send-email-berrange@redhat.com> References: <1461751518-12128-1-git-send-email-berrange@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PATCH v6 for-2.7 15/28] migration: convert fd socket protocol to use QIOChannel X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Amit Shah , "Dr. David Alan Gilbert" , Juan Quintela Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Convert the fd socket migration protocol driver to use QIOChannel and QEMUFileChannel, instead of plain sockets APIs. It can be unconditionally built because the QIOChannel APIs it uses will take care to report suitable error messages if needed. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrange --- migration/Makefile.objs | 4 +-- migration/fd.c | 75 +++++++++++++++++++------------------------------ migration/migration.c | 4 --- trace-events | 4 +++ 4 files changed, 35 insertions(+), 52 deletions(-) diff --git a/migration/Makefile.objs b/migration/Makefile.objs index 59e8c09..0987bb6 100644 --- a/migration/Makefile.objs +++ b/migration/Makefile.objs @@ -1,11 +1,11 @@ -common-obj-y += migration.o socket.o +common-obj-y += migration.o socket.o fd.o common-obj-y += vmstate.o common-obj-y += qemu-file.o qemu-file-buf.o qemu-file-unix.o qemu-file-stdio.o common-obj-y += qemu-file-channel.o common-obj-y += xbzrle.o postcopy-ram.o common-obj-$(CONFIG_RDMA) += rdma.o -common-obj-$(CONFIG_POSIX) += exec.o fd.o +common-obj-$(CONFIG_POSIX) += exec.o common-obj-y += block.o diff --git a/migration/fd.c b/migration/fd.c index 3d788bb..60a75b8 100644 --- a/migration/fd.c +++ b/migration/fd.c @@ -1,10 +1,11 @@ /* * QEMU live migration via generic fd * - * Copyright Red Hat, Inc. 2009 + * Copyright Red Hat, Inc. 2009-2016 * * Authors: * Chris Lalancette + * Daniel P. Berrange * * This work is licensed under the terms of the GNU GPL, version 2. See * the COPYING file in the top-level directory. @@ -16,75 +17,57 @@ #include "qemu/osdep.h" #include "qapi/error.h" #include "qemu-common.h" -#include "qemu/main-loop.h" -#include "qemu/sockets.h" #include "migration/migration.h" #include "monitor/monitor.h" -#include "migration/qemu-file.h" -#include "block/block.h" +#include "io/channel-util.h" +#include "trace.h" -//#define DEBUG_MIGRATION_FD - -#ifdef DEBUG_MIGRATION_FD -#define DPRINTF(fmt, ...) \ - do { printf("migration-fd: " fmt, ## __VA_ARGS__); } while (0) -#else -#define DPRINTF(fmt, ...) \ - do { } while (0) -#endif - -static bool fd_is_socket(int fd) -{ - struct stat stat; - int ret = fstat(fd, &stat); - if (ret == -1) { - /* When in doubt say no */ - return false; - } - return S_ISSOCK(stat.st_mode); -} void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp) { + QIOChannel *ioc; int fd = monitor_get_fd(cur_mon, fdname, errp); if (fd == -1) { return; } - if (fd_is_socket(fd)) { - s->to_dst_file = qemu_fopen_socket(fd, "wb"); - } else { - s->to_dst_file = qemu_fdopen(fd, "wb"); + trace_migration_fd_outgoing(fd); + ioc = qio_channel_new_fd(fd, errp); + if (!ioc) { + close(fd); + return; } - migrate_fd_connect(s); + migration_set_outgoing_channel(s, ioc); + object_unref(OBJECT(ioc)); } -static void fd_accept_incoming_migration(void *opaque) +static gboolean fd_accept_incoming_migration(QIOChannel *ioc, + GIOCondition condition, + gpointer opaque) { - QEMUFile *f = opaque; - - qemu_set_fd_handler(qemu_get_fd(f), NULL, NULL, NULL); - process_incoming_migration(f); + migration_set_incoming_channel(migrate_get_current(), ioc); + object_unref(OBJECT(ioc)); + return FALSE; /* unregister */ } void fd_start_incoming_migration(const char *infd, Error **errp) { + QIOChannel *ioc; int fd; - QEMUFile *f; - - DPRINTF("Attempting to start an incoming migration via fd\n"); fd = strtol(infd, NULL, 0); - if (fd_is_socket(fd)) { - f = qemu_fopen_socket(fd, "rb"); - } else { - f = qemu_fdopen(fd, "rb"); - } - if(f == NULL) { - error_setg_errno(errp, errno, "failed to open the source descriptor"); + trace_migration_fd_incoming(fd); + + ioc = qio_channel_new_fd(fd, errp); + if (!ioc) { + close(fd); return; } - qemu_set_fd_handler(fd, fd_accept_incoming_migration, NULL, f); + qio_channel_add_watch(ioc, + G_IO_IN, + fd_accept_incoming_migration, + NULL, + NULL); } diff --git a/migration/migration.c b/migration/migration.c index a43ab57..f4c7229 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -317,10 +317,8 @@ void qemu_start_incoming_migration(const char *uri, Error **errp) #endif } else if (strstart(uri, "unix:", &p)) { unix_start_incoming_migration(p, errp); -#if !defined(WIN32) } else if (strstart(uri, "fd:", &p)) { fd_start_incoming_migration(p, errp); -#endif } else { error_setg(errp, "unknown migration protocol: %s", uri); } @@ -1068,10 +1066,8 @@ void qmp_migrate(const char *uri, bool has_blk, bool blk, #endif } else if (strstart(uri, "unix:", &p)) { unix_start_outgoing_migration(s, p, &local_err); -#if !defined(WIN32) } else if (strstart(uri, "fd:", &p)) { fd_start_outgoing_migration(s, p, &local_err); -#endif } else { error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "uri", "a valid migration protocol"); diff --git a/trace-events b/trace-events index 5026d1a..c287738 100644 --- a/trace-events +++ b/trace-events @@ -1598,6 +1598,10 @@ postcopy_ram_incoming_cleanup_entry(void) "" postcopy_ram_incoming_cleanup_exit(void) "" postcopy_ram_incoming_cleanup_join(void) "" +# migration/fd.c +migration_fd_outgoing(int fd) "fd=%d" +migration_fd_incoming(int fd) "fd=%d" + # migration/socket.c migration_socket_incoming_accepted(void) "" migration_socket_outgoing_connected(void) ""