From patchwork Sat Mar 10 21:21:52 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Chen X-Patchwork-Id: 884166 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=gmail.com header.i=@gmail.com header.b="F930HI2e"; dkim-atps=neutral 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 3zzHPD5jFFzB2nD for ; Sun, 11 Mar 2018 08:26:24 +1100 (AEDT) Received: from localhost ([::1]:51984 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eum0T-0004no-Gu for incoming@patchwork.ozlabs.org; Sat, 10 Mar 2018 16:26:21 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48382) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eulwp-0002De-HX for qemu-devel@nongnu.org; Sat, 10 Mar 2018 16:22:41 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eulwo-0003I8-6q for qemu-devel@nongnu.org; Sat, 10 Mar 2018 16:22:35 -0500 Received: from mail-pg0-x242.google.com ([2607:f8b0:400e:c05::242]:38263) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1eulwn-0003I1-UF for qemu-devel@nongnu.org; Sat, 10 Mar 2018 16:22:34 -0500 Received: by mail-pg0-x242.google.com with SMTP id a15so582994pgn.5 for ; Sat, 10 Mar 2018 13:22:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=jZZL+cB7ywLrmktyU3wExkoQrmvin6i8y6BlcpE3nRg=; b=F930HI2eyiUKJQCoPkX+JBnQCeUpCjYtuSiMjifx+WXXcFhfyWY54Gfhu8DGX3BtKQ iTMuBAfpTIb9TE5YQ/mSaJlooecA2IxYiRrxs1mc1tglkbEsWlNhXX9ZC4afxgjIYG0C NIRKcP6Zz/eVEiCT0Q7oSqBZCVvJcNPcKQ07sligAdeyAuAXoHPpfER5AOUu1pH42q7V qd2Inpx2Mf0cGfWc3n0M9AyTm77+WVuJHyXw6ntCRzEIhYQPQrd/MXRQjEuZEsLZ3GPI 0XQdbemijVPaJOZgBbdSZsqf+lr6t3odZE6ppoS5keU3eAawbdmDDXVyqIlWC328qI9n F3xA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=jZZL+cB7ywLrmktyU3wExkoQrmvin6i8y6BlcpE3nRg=; b=JbLCJSliCwZpFDsM+u7tDnS3xrb3lZQK+X1ipfNEFeQhF5wSVrKkyhyIX7r37BaK7D eZo2vfRhkXtmK2gmFKbVwXJXwlieiiLewDEQNuKXGh4qtM7BNlRbo1x72lk5sWpZ3TTy koGOvUQz2vGC43w4JBiUkVsTTHR02+VPhaKlG4E2ARW+iUtKirPbRxsG0gQOgMeV2oaY kCrrwWe84xHA32p2Lg6+FRwQrVR63GsSARPJnYHsJv9GG5E+rMHkEBDPImkaMhDxSQ1X LhD+bZ6bZhlyI2tW31oLzNVn25GPIjZwLcTOUWYwnJJEoFk02UCzixmTn1qS99lG5QZu amyg== X-Gm-Message-State: AElRT7EaFaIBc848lXA3I0RUp/sb5XrHbkCcNdWtx5AwhuBm2b+/P0yG gACDHHXHs5uZjWTplVnHkQiu2+m8 X-Google-Smtp-Source: AG47ELui9DpPiIzEddp/Kx34X0FqX1/A7M4EJ/xuqZacDSbzveCsK4xTKMmxh9jpx5hXI2wVlGIOtQ== X-Received: by 10.99.0.19 with SMTP id 19mr2543078pga.25.1520716952669; Sat, 10 Mar 2018 13:22:32 -0800 (PST) Received: from localhost.localdomain (120.236.201.35.bc.googleusercontent.com. [35.201.236.120]) by smtp.gmail.com with ESMTPSA id q65sm10532191pfd.140.2018.03.10.13.22.29 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sat, 10 Mar 2018 13:22:31 -0800 (PST) From: Zhang Chen To: qemu-devel@nongnu.org Date: Sun, 11 Mar 2018 05:21:52 +0800 Message-Id: <1520716927-17068-3-git-send-email-zhangckid@gmail.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1520716927-17068-1-git-send-email-zhangckid@gmail.com> References: <1520716927-17068-1-git-send-email-zhangckid@gmail.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400e:c05::242 Subject: [Qemu-devel] [PATCH V5 02/17] colo-compare: implement the process of checkpoint 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: zhanghailiang , Li Zhijian , Juan Quintela , Jason Wang , "Dr . David Alan Gilbert" , Markus Armbruster , Zhang Chen , Paolo Bonzini Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" While do checkpoint, we need to flush all the unhandled packets, By using the filter notifier mechanism, we can easily to notify every compare object to do this process, which runs inside of compare threads as a coroutine. Signed-off-by: zhanghailiang Signed-off-by: Zhang Chen --- include/migration/colo.h | 6 ++++ net/colo-compare.c | 76 ++++++++++++++++++++++++++++++++++++++++++++++++ net/colo-compare.h | 22 ++++++++++++++ 3 files changed, 104 insertions(+) create mode 100644 net/colo-compare.h diff --git a/include/migration/colo.h b/include/migration/colo.h index 2fe48ad..fefb2fc 100644 --- a/include/migration/colo.h +++ b/include/migration/colo.h @@ -16,6 +16,12 @@ #include "qemu-common.h" #include "qapi/qapi-types-migration.h" +enum colo_event { + COLO_EVENT_NONE, + COLO_EVENT_CHECKPOINT, + COLO_EVENT_FAILOVER, +}; + void colo_info_init(void); void migrate_start_colo_process(MigrationState *s); diff --git a/net/colo-compare.c b/net/colo-compare.c index 23b2d2c..7ff3ae8 100644 --- a/net/colo-compare.c +++ b/net/colo-compare.c @@ -27,11 +27,16 @@ #include "qemu/sockets.h" #include "net/colo.h" #include "sysemu/iothread.h" +#include "net/colo-compare.h" +#include "migration/colo.h" #define TYPE_COLO_COMPARE "colo-compare" #define COLO_COMPARE(obj) \ OBJECT_CHECK(CompareState, (obj), TYPE_COLO_COMPARE) +static QTAILQ_HEAD(, CompareState) net_compares = + QTAILQ_HEAD_INITIALIZER(net_compares); + #define COMPARE_READ_LEN_MAX NET_BUFSIZE #define MAX_QUEUE_SIZE 1024 @@ -41,6 +46,10 @@ /* TODO: Should be configurable */ #define REGULAR_PACKET_CHECK_MS 3000 +static QemuMutex event_mtx; +static QemuCond event_complete_cond; +static int event_unhandled_count; + /* * + CompareState ++ * | | @@ -87,6 +96,11 @@ typedef struct CompareState { IOThread *iothread; GMainContext *worker_context; QEMUTimer *packet_check_timer; + + QEMUBH *event_bh; + enum colo_event event; + + QTAILQ_ENTRY(CompareState) next; } CompareState; typedef struct CompareClass { @@ -736,6 +750,25 @@ static void check_old_packet_regular(void *opaque) REGULAR_PACKET_CHECK_MS); } +/* Public API, Used for COLO frame to notify compare event */ +void colo_notify_compares_event(void *opaque, int event, Error **errp) +{ + CompareState *s; + + qemu_mutex_lock(&event_mtx); + QTAILQ_FOREACH(s, &net_compares, next) { + s->event = event; + qemu_bh_schedule(s->event_bh); + event_unhandled_count++; + } + /* Wait all compare threads to finish handling this event */ + while (event_unhandled_count > 0) { + qemu_cond_wait(&event_complete_cond, &event_mtx); + } + + qemu_mutex_unlock(&event_mtx); +} + static void colo_compare_timer_init(CompareState *s) { AioContext *ctx = iothread_get_aio_context(s->iothread); @@ -756,6 +789,28 @@ static void colo_compare_timer_del(CompareState *s) } } +static void colo_flush_packets(void *opaque, void *user_data); + +static void colo_compare_handle_event(void *opaque) +{ + CompareState *s = opaque; + + switch (s->event) { + case COLO_EVENT_CHECKPOINT: + g_queue_foreach(&s->conn_list, colo_flush_packets, s); + break; + case COLO_EVENT_FAILOVER: + break; + default: + break; + } + qemu_mutex_lock(&event_mtx); + assert(event_unhandled_count > 0); + event_unhandled_count--; + qemu_cond_broadcast(&event_complete_cond); + qemu_mutex_unlock(&event_mtx); +} + static void colo_compare_iothread(CompareState *s) { object_ref(OBJECT(s->iothread)); @@ -769,6 +824,7 @@ static void colo_compare_iothread(CompareState *s) s, s->worker_context, true); colo_compare_timer_init(s); + s->event_bh = qemu_bh_new(colo_compare_handle_event, s); } static char *compare_get_pri_indev(Object *obj, Error **errp) @@ -926,8 +982,13 @@ static void colo_compare_complete(UserCreatable *uc, Error **errp) net_socket_rs_init(&s->pri_rs, compare_pri_rs_finalize, s->vnet_hdr); net_socket_rs_init(&s->sec_rs, compare_sec_rs_finalize, s->vnet_hdr); + QTAILQ_INSERT_TAIL(&net_compares, s, next); + g_queue_init(&s->conn_list); + qemu_mutex_init(&event_mtx); + qemu_cond_init(&event_complete_cond); + s->connection_track_table = g_hash_table_new_full(connection_key_hash, connection_key_equal, g_free, @@ -990,6 +1051,7 @@ static void colo_compare_init(Object *obj) static void colo_compare_finalize(Object *obj) { CompareState *s = COLO_COMPARE(obj); + CompareState *tmp = NULL; qemu_chr_fe_deinit(&s->chr_pri_in, false); qemu_chr_fe_deinit(&s->chr_sec_in, false); @@ -997,6 +1059,16 @@ static void colo_compare_finalize(Object *obj) if (s->iothread) { colo_compare_timer_del(s); } + + qemu_bh_delete(s->event_bh); + + QTAILQ_FOREACH(tmp, &net_compares, next) { + if (!strcmp(tmp->outdev, s->outdev)) { + QTAILQ_REMOVE(&net_compares, s, next); + break; + } + } + /* Release all unhandled packets after compare thead exited */ g_queue_foreach(&s->conn_list, colo_flush_packets, s); @@ -1009,6 +1081,10 @@ static void colo_compare_finalize(Object *obj) if (s->iothread) { object_unref(OBJECT(s->iothread)); } + + qemu_mutex_destroy(&event_mtx); + qemu_cond_destroy(&event_complete_cond); + g_free(s->pri_indev); g_free(s->sec_indev); g_free(s->outdev); diff --git a/net/colo-compare.h b/net/colo-compare.h new file mode 100644 index 0000000..1b1ce76 --- /dev/null +++ b/net/colo-compare.h @@ -0,0 +1,22 @@ +/* + * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO) + * (a.k.a. Fault Tolerance or Continuous Replication) + * + * Copyright (c) 2017 HUAWEI TECHNOLOGIES CO., LTD. + * Copyright (c) 2017 FUJITSU LIMITED + * Copyright (c) 2017 Intel Corporation + * + * Authors: + * zhanghailiang + * Zhang Chen + * + * This work is licensed under the terms of the GNU GPL, version 2 or + * later. See the COPYING file in the top-level directory. + */ + +#ifndef QEMU_COLO_COMPARE_H +#define QEMU_COLO_COMPARE_H + +void colo_notify_compares_event(void *opaque, int event, Error **errp); + +#endif /* QEMU_COLO_COMPARE_H */