From patchwork Fri Jan 29 05:27:25 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Congyang X-Patchwork-Id: 8159331 Return-Path: X-Original-To: patchwork-xen-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 1FD1B9FE7F for ; Fri, 29 Jan 2016 05:30:23 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 439C6201F2 for ; Fri, 29 Jan 2016 05:30:21 +0000 (UTC) Received: from lists.xen.org (lists.xenproject.org [50.57.142.19]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 05B0D20123 for ; Fri, 29 Jan 2016 05:30:20 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xen.org) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aP1av-0007i8-0o; Fri, 29 Jan 2016 05:27:41 +0000 Received: from mail6.bemta4.messagelabs.com ([85.158.143.247]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1aP1as-0007d8-CN for xen-devel@lists.xen.org; Fri, 29 Jan 2016 05:27:38 +0000 Received: from [85.158.143.35] by server-1.bemta-4.messagelabs.com id F7/4C-09708-A48FAA65; Fri, 29 Jan 2016 05:27:38 +0000 X-Env-Sender: wency@cn.fujitsu.com X-Msg-Ref: server-13.tower-21.messagelabs.com!1454045252!11153695!2 X-Originating-IP: [59.151.112.132] X-SpamReason: No, hits=0.0 required=7.0 tests= X-StarScan-Received: X-StarScan-Version: 7.35.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 62184 invoked from network); 29 Jan 2016 05:27:36 -0000 Received: from cn.fujitsu.com (HELO heian.cn.fujitsu.com) (59.151.112.132) by server-13.tower-21.messagelabs.com with SMTP; 29 Jan 2016 05:27:36 -0000 X-IronPort-AV: E=Sophos;i="5.20,346,1444665600"; d="scan'208";a="3106345" Received: from unknown (HELO cn.fujitsu.com) ([10.167.33.5]) by heian.cn.fujitsu.com with ESMTP; 29 Jan 2016 13:27:32 +0800 Received: from G08CNEXCHPEKD01.g08.fujitsu.local (unknown [10.167.33.80]) by cn.fujitsu.com (Postfix) with ESMTP id 2A954418AD66; Fri, 29 Jan 2016 13:26:31 +0800 (CST) Received: from G08FNSTD140052.g08.fujitsu.local (10.167.226.52) by G08CNEXCHPEKD01.g08.fujitsu.local (10.167.33.89) with Microsoft SMTP Server (TLS) id 14.3.181.6; Fri, 29 Jan 2016 13:27:06 +0800 From: Wen Congyang To: xen devel , Konrad Rzeszutek Wilk , Andrew Cooper , Ian Campbell , Ian Jackson , Wei Liu Date: Fri, 29 Jan 2016 13:27:25 +0800 Message-ID: <1454045254-3711-10-git-send-email-wency@cn.fujitsu.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1454045254-3711-1-git-send-email-wency@cn.fujitsu.com> References: <1454045254-3711-1-git-send-email-wency@cn.fujitsu.com> MIME-Version: 1.0 X-Originating-IP: [10.167.226.52] X-yoursite-MailScanner-ID: 2A954418AD66.A8E68 X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: wency@cn.fujitsu.com X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Cc: Lars Kurth , Changlong Xie , Wen Congyang , Gui Jianfeng , Jiang Yunhong , Dong Eddie , Shriram Rajagopalan , Yang Hongyang Subject: [Xen-devel] [PATCH v7 09/18] tools/libxl: introduce libxl__domain_common_switch_qemu_logdirty() X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.13 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Secondary vm is running in COLO mode, we need to send secondary vm's dirty page information to primary host at checkpoint, so we have to enable qemu logdirty on secondary. libxl__domain_suspend_common_switch_qemu_logdirty() is to enable qemu logdirty. But it uses libxl__domain_save_state, and calls libxl__xc_domain_saverestore_async_callback_done() before exits. This can not be used for secondary vm. Update libxl__domain_suspend_common_switch_qemu_logdirty() to introduce a new API libxl__domain_common_switch_qemu_logdirty(). This API only uses libxl__logdirty_switch, and calls lds->callback before exits. This new API will be used by the patch: secondary vm suspend/resume/checkpoint code Signed-off-by: Yang Hongyang Signed-off-by: Wen Congyang CC: Andrew Cooper Acked-by: Ian Campbell Acked-by: Wei Liu --- tools/libxl/libxl_dom_save.c | 95 ++++++++++++++++++++++++-------------------- tools/libxl/libxl_internal.h | 8 ++++ 2 files changed, 60 insertions(+), 43 deletions(-) diff --git a/tools/libxl/libxl_dom_save.c b/tools/libxl/libxl_dom_save.c index 7383d2d..8bcc3ff 100644 --- a/tools/libxl/libxl_dom_save.c +++ b/tools/libxl/libxl_dom_save.c @@ -42,7 +42,7 @@ static void switch_logdirty_timeout(libxl__egc *egc, libxl__ev_time *ev, static void switch_logdirty_xswatch(libxl__egc *egc, libxl__ev_xswatch*, const char *watch_path, const char *event_path); static void switch_logdirty_done(libxl__egc *egc, - libxl__domain_save_state *dss, int rc); + libxl__logdirty_switch *lds, int rc); static void logdirty_init(libxl__logdirty_switch *lds) { @@ -52,13 +52,10 @@ static void logdirty_init(libxl__logdirty_switch *lds) } static void domain_suspend_switch_qemu_xen_traditional_logdirty - (int domid, unsigned enable, - libxl__save_helper_state *shs) + (libxl__egc *egc, int domid, unsigned enable, + libxl__logdirty_switch *lds) { - libxl__egc *egc = shs->egc; - libxl__domain_save_state *dss = shs->caller_state; - libxl__logdirty_switch *lds = &dss->logdirty; - STATE_AO_GC(dss->ao); + STATE_AO_GC(lds->ao); int rc; xs_transaction_t t = 0; const char *got; @@ -120,26 +117,34 @@ static void domain_suspend_switch_qemu_xen_traditional_logdirty out: LOG(ERROR,"logdirty switch failed (rc=%d), abandoning suspend",rc); libxl__xs_transaction_abort(gc, &t); - switch_logdirty_done(egc,dss,rc); + switch_logdirty_done(egc,lds,rc); } static void domain_suspend_switch_qemu_xen_logdirty - (int domid, unsigned enable, - libxl__save_helper_state *shs) + (libxl__egc *egc, int domid, unsigned enable, + libxl__logdirty_switch *lds) { - libxl__egc *egc = shs->egc; - libxl__domain_save_state *dss = shs->caller_state; - STATE_AO_GC(dss->ao); + STATE_AO_GC(lds->ao); int rc; rc = libxl__qmp_set_global_dirty_log(gc, domid, enable); - if (!rc) { - libxl__xc_domain_saverestore_async_callback_done(egc, shs, 0); - } else { + if (rc) LOG(ERROR,"logdirty switch failed (rc=%d), abandoning suspend",rc); + + lds->callback(egc, lds, rc); +} + +static void domain_suspend_switch_qemu_logdirty_done + (libxl__egc *egc, libxl__logdirty_switch *lds, int rc) +{ + libxl__domain_save_state *dss = CONTAINER_OF(lds, *dss, logdirty); + + if (rc) { dss->rc = rc; - libxl__xc_domain_saverestore_async_callback_done(egc, shs, -1); - } + libxl__xc_domain_saverestore_async_callback_done(egc, + &dss->sws.shs, -1); + } else + libxl__xc_domain_saverestore_async_callback_done(egc, &dss->sws.shs, 0); } void libxl__domain_suspend_common_switch_qemu_logdirty @@ -148,42 +153,52 @@ void libxl__domain_suspend_common_switch_qemu_logdirty libxl__save_helper_state *shs = user; libxl__egc *egc = shs->egc; libxl__domain_save_state *dss = shs->caller_state; - STATE_AO_GC(dss->ao); + + /* Convenience aliases. */ + libxl__logdirty_switch *const lds = &dss->logdirty; + + lds->callback = domain_suspend_switch_qemu_logdirty_done; + libxl__domain_common_switch_qemu_logdirty(egc, domid, enable, lds); +} + +void libxl__domain_common_switch_qemu_logdirty(libxl__egc *egc, + int domid, unsigned enable, + libxl__logdirty_switch *lds) +{ + STATE_AO_GC(lds->ao); switch (libxl__device_model_version_running(gc, domid)) { case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL: - domain_suspend_switch_qemu_xen_traditional_logdirty(domid, enable, shs); + domain_suspend_switch_qemu_xen_traditional_logdirty(egc, domid, enable, + lds); break; case LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN: - domain_suspend_switch_qemu_xen_logdirty(domid, enable, shs); + domain_suspend_switch_qemu_xen_logdirty(egc, domid, enable, lds); break; case LIBXL_DEVICE_MODEL_VERSION_NONE: - libxl__xc_domain_saverestore_async_callback_done(egc, shs, 0); + lds->callback(egc, lds, 0); break; default: LOG(ERROR,"logdirty switch failed" ", no valid device model version found, abandoning suspend"); - dss->rc = ERROR_FAIL; - libxl__xc_domain_saverestore_async_callback_done(egc, shs, -1); + lds->callback(egc, lds, ERROR_FAIL); } } static void switch_logdirty_timeout(libxl__egc *egc, libxl__ev_time *ev, const struct timeval *requested_abs, int rc) { - libxl__domain_save_state *dss = CONTAINER_OF(ev, *dss, logdirty.timeout); - STATE_AO_GC(dss->ao); + libxl__logdirty_switch *lds = CONTAINER_OF(ev, *lds, timeout); + STATE_AO_GC(lds->ao); LOG(ERROR,"logdirty switch: wait for device model timed out"); - switch_logdirty_done(egc,dss,ERROR_FAIL); + switch_logdirty_done(egc,lds,ERROR_FAIL); } static void switch_logdirty_xswatch(libxl__egc *egc, libxl__ev_xswatch *watch, const char *watch_path, const char *event_path) { - libxl__domain_save_state *dss = - CONTAINER_OF(watch, *dss, logdirty.watch); - libxl__logdirty_switch *lds = &dss->logdirty; - STATE_AO_GC(dss->ao); + libxl__logdirty_switch *lds = CONTAINER_OF(watch, *lds, watch); + STATE_AO_GC(lds->ao); const char *got; xs_transaction_t t = 0; int rc; @@ -229,28 +244,20 @@ static void switch_logdirty_xswatch(libxl__egc *egc, libxl__ev_xswatch *watch, if (rc <= 0) { if (rc < 0) LOG(ERROR,"logdirty switch: failed (rc=%d)",rc); - switch_logdirty_done(egc,dss,rc); + switch_logdirty_done(egc,lds,rc); } } static void switch_logdirty_done(libxl__egc *egc, - libxl__domain_save_state *dss, + libxl__logdirty_switch *lds, int rc) { - STATE_AO_GC(dss->ao); - libxl__logdirty_switch *lds = &dss->logdirty; + STATE_AO_GC(lds->ao); libxl__ev_xswatch_deregister(gc, &lds->watch); libxl__ev_time_deregister(gc, &lds->timeout); - int broke; - if (rc) { - broke = -1; - dss->rc = rc; - } else { - broke = 0; - } - libxl__xc_domain_saverestore_async_callback_done(egc, &dss->sws.shs, broke); + lds->callback(egc, lds, rc); } /*----- callbacks, called by xc_domain_save -----*/ @@ -346,6 +353,8 @@ void libxl__domain_save(libxl__egc *egc, libxl__domain_save_state *dss) dss->rc = 0; logdirty_init(&dss->logdirty); + dss->logdirty.ao = ao; + dsps->ao = ao; dsps->domid = domid; rc = libxl__domain_suspend_init(egc, dsps, type); diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h index 896c119..dd710cc 100644 --- a/tools/libxl/libxl_internal.h +++ b/tools/libxl/libxl_internal.h @@ -3073,6 +3073,11 @@ libxl__stream_write_inuse(const libxl__stream_write_state *stream) } typedef struct libxl__logdirty_switch { + /* Set by caller of libxl__domain_common_switch_qemu_logdirty */ + libxl__ao *ao; + void (*callback)(libxl__egc *egc, struct libxl__logdirty_switch *lds, + int rc); + const char *cmd; const char *cmd_path; const char *ret_path; @@ -3490,6 +3495,9 @@ void libxl__xc_domain_saverestore_async_callback_done(libxl__egc *egc, _hidden void libxl__domain_suspend_common_switch_qemu_logdirty (int domid, unsigned int enable, void *data); +_hidden void libxl__domain_common_switch_qemu_logdirty(libxl__egc *egc, + int domid, unsigned enable, + libxl__logdirty_switch *lds); _hidden int libxl__save_emulator_xenstore_data(libxl__domain_save_state *dss, char **buf, uint32_t *len); _hidden int libxl__restore_emulator_xenstore_data