From patchwork Fri Mar 11 16:37:50 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: 8567961 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id BA839C0553 for ; Fri, 11 Mar 2016 16:57:16 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id F37D520328 for ; Fri, 11 Mar 2016 16:57:15 +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 161742026D for ; Fri, 11 Mar 2016 16:57:15 +0000 (UTC) Received: from localhost ([::1]:56463 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aeQDf-0004B4-6N for patchwork-qemu-devel@patchwork.kernel.org; Fri, 11 Mar 2016 11:47:19 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53998) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aeQ5B-00089K-LG for qemu-devel@nongnu.org; Fri, 11 Mar 2016 11:38:34 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aeQ5A-0005PQ-5n for qemu-devel@nongnu.org; Fri, 11 Mar 2016 11:38:33 -0500 Received: from mx1.redhat.com ([209.132.183.28]:36231) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aeQ59-0005PF-Ut for qemu-devel@nongnu.org; Fri, 11 Mar 2016 11:38:32 -0500 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) by mx1.redhat.com (Postfix) with ESMTPS id 95D3E51F for ; Fri, 11 Mar 2016 16:38:31 +0000 (UTC) Received: from t530wlan.home.berrange.com.com (vpn1-6-25.ams2.redhat.com [10.36.6.25]) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u2BGc5Oq002899; Fri, 11 Mar 2016 11:38:30 -0500 From: "Daniel P. Berrange" To: qemu-devel@nongnu.org Date: Fri, 11 Mar 2016 16:37:50 +0000 Message-Id: <1457714282-6981-17-git-send-email-berrange@redhat.com> In-Reply-To: <1457714282-6981-1-git-send-email-berrange@redhat.com> References: <1457714282-6981-1-git-send-email-berrange@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Cc: Amit Shah , "Dr. David Alan Gilbert" , Juan Quintela Subject: [Qemu-devel] [PATCH v4 16/28] migration: convert exec socket protocol to use QIOChannel 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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org 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 exec socket migration protocol driver to use QIOChannel and QEMUFileChannel, instead of the stdio popen APIs. It can be unconditionally built because the QIOChannelCommand class can report suitable error messages on platforms which can't fork processes. Reviewed-by: Dr. David Alan Gilbert Signed-off-by: Daniel P. Berrange --- migration/Makefile.objs | 3 +-- migration/exec.c | 63 +++++++++++++++++++++++++------------------------ migration/migration.c | 4 ---- trace-events | 4 ++++ 4 files changed, 37 insertions(+), 37 deletions(-) diff --git a/migration/Makefile.objs b/migration/Makefile.objs index 0987bb6..86dd050 100644 --- a/migration/Makefile.objs +++ b/migration/Makefile.objs @@ -1,11 +1,10 @@ -common-obj-y += migration.o socket.o fd.o +common-obj-y += migration.o socket.o fd.o exec.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 common-obj-y += block.o diff --git a/migration/exec.c b/migration/exec.c index 62f892d..4f439b4 100644 --- a/migration/exec.c +++ b/migration/exec.c @@ -3,10 +3,12 @@ * * Copyright IBM, Corp. 2008 * Copyright Dell MessageOne 2008 + * Copyright Red Hat, Inc. 2015-2016 * * Authors: * Anthony Liguori * Charles Duffy + * 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. @@ -16,54 +18,53 @@ */ #include "qemu/osdep.h" -#include "qemu-common.h" -#include "qemu/sockets.h" -#include "qemu/main-loop.h" #include "migration/migration.h" -#include "migration/qemu-file.h" -#include "block/block.h" -#include +#include "io/channel-command.h" +#include "trace.h" -//#define DEBUG_MIGRATION_EXEC - -#ifdef DEBUG_MIGRATION_EXEC -#define DPRINTF(fmt, ...) \ - do { printf("migration-exec: " fmt, ## __VA_ARGS__); } while (0) -#else -#define DPRINTF(fmt, ...) \ - do { } while (0) -#endif void exec_start_outgoing_migration(MigrationState *s, const char *command, Error **errp) { - s->to_dst_file = qemu_popen_cmd(command, "w"); - if (s->to_dst_file == NULL) { - error_setg_errno(errp, errno, "failed to popen the migration target"); + QIOChannel *ioc; + const char *argv[] = { "/bin/sh", "-c", command, NULL }; + + trace_migration_exec_outgoing(command); + ioc = QIO_CHANNEL(qio_channel_command_new_spawn(argv, + O_WRONLY, + errp)); + if (!ioc) { return; } - migrate_fd_connect(s); + migration_set_outgoing_channel(s, ioc); + object_unref(OBJECT(ioc)); } -static void exec_accept_incoming_migration(void *opaque) +static gboolean exec_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 exec_start_incoming_migration(const char *command, Error **errp) { - QEMUFile *f; + QIOChannel *ioc; + const char *argv[] = { "/bin/sh", "-c", command, NULL }; - DPRINTF("Attempting to start an incoming migration\n"); - f = qemu_popen_cmd(command, "r"); - if(f == NULL) { - error_setg_errno(errp, errno, "failed to popen the migration source"); + trace_migration_exec_incoming(command); + ioc = QIO_CHANNEL(qio_channel_command_new_spawn(argv, + O_RDONLY, + errp)); + if (!ioc) { return; } - qemu_set_fd_handler(qemu_get_fd(f), exec_accept_incoming_migration, NULL, - f); + qio_channel_add_watch(ioc, + G_IO_IN, + exec_accept_incoming_migration, + NULL, + NULL); } diff --git a/migration/migration.c b/migration/migration.c index bf7a976..8219ea6 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -311,10 +311,8 @@ void qemu_start_incoming_migration(const char *uri, Error **errp) } else if (strstart(uri, "rdma:", &p)) { rdma_start_incoming_migration(p, errp); #endif -#if !defined(WIN32) } else if (strstart(uri, "exec:", &p)) { exec_start_incoming_migration(p, errp); -#endif } else if (strstart(uri, "unix:", &p)) { unix_start_incoming_migration(p, errp); } else if (strstart(uri, "fd:", &p)) { @@ -1060,10 +1058,8 @@ void qmp_migrate(const char *uri, bool has_blk, bool blk, } else if (strstart(uri, "rdma:", &p)) { rdma_start_outgoing_migration(s, p, &local_err); #endif -#if !defined(WIN32) } else if (strstart(uri, "exec:", &p)) { exec_start_outgoing_migration(s, p, &local_err); -#endif } else if (strstart(uri, "unix:", &p)) { unix_start_outgoing_migration(s, p, &local_err); } else if (strstart(uri, "fd:", &p)) { diff --git a/trace-events b/trace-events index 07280e5..b195602 100644 --- a/trace-events +++ b/trace-events @@ -1597,6 +1597,10 @@ postcopy_ram_incoming_cleanup_entry(void) "" postcopy_ram_incoming_cleanup_exit(void) "" postcopy_ram_incoming_cleanup_join(void) "" +# migration/exec.c +migration_exec_outgoing(const char *cmd) "cmd=%s" +migration_exec_incoming(const char *cmd) "cmd=%s" + # migration/fd.c migration_fd_outgoing(int fd) "fd=%d" migration_fd_incoming(int fd) "fd=%d"