From patchwork Tue Aug 16 10:25:58 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vladimir Sementsov-Ogievskiy X-Patchwork-Id: 659630 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org 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 3sD83z6HM4z9sC3 for ; Tue, 16 Aug 2016 20:39:11 +1000 (AEST) Received: from localhost ([::1]:41233 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bZbm1-0003u3-Rx for incoming@patchwork.ozlabs.org; Tue, 16 Aug 2016 06:39:09 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43104) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bZbZv-0000z5-Mb for qemu-devel@nongnu.org; Tue, 16 Aug 2016 06:26:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bZbZq-0006Md-NU for qemu-devel@nongnu.org; Tue, 16 Aug 2016 06:26:39 -0400 Received: from mailhub.sw.ru ([195.214.232.25]:43756 helo=relay.sw.ru) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bZbZh-0006GL-NR; Tue, 16 Aug 2016 06:26:26 -0400 Received: from kvm.qa.sw.ru. ([10.28.8.145]) by relay.sw.ru (8.13.4/8.13.4) with ESMTP id u7G2W6ZQ021884; Tue, 16 Aug 2016 05:32:08 +0300 (MSK) From: Vladimir Sementsov-Ogievskiy To: qemu-devel@nongnu.org, qemu-block@nongnu.org Date: Tue, 16 Aug 2016 13:25:58 +0300 Message-Id: <1471343175-14945-2-git-send-email-vsementsov@virtuozzo.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1471343175-14945-1-git-send-email-vsementsov@virtuozzo.com> References: <1471343175-14945-1-git-send-email-vsementsov@virtuozzo.com> X-detected-operating-system: by eggs.gnu.org: OpenBSD 3.x X-Received-From: 195.214.232.25 Subject: [Qemu-devel] [PATCH 01/18] migration: add has_postcopy savevm handler 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: kwolf@redhat.com, peter.maydell@linaro.org, vsementsov@virtuozzo.com, famz@redhat.com, lirans@il.ibm.com, quintela@redhat.com, jsnow@redhat.com, armbru@redhat.com, mreitz@redhat.com, stefanha@redhat.com, den@openvz.org, amit.shah@redhat.com, pbonzini@redhat.com, dgilbert@redhat.com Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Now postcopy-able states are recognized by not NULL save_live_complete_postcopy handler. But when we have several different postcopy-able states, it is not convenient. Ram postcopy may be disabled, while some other postcopy enabled, in this case Ram state should behave as it is not postcopy-able. This patch add separate has_postcopy handler to specify behaviour of savevm state. Signed-off-by: Vladimir Sementsov-Ogievskiy Reviewed-by: Juan Quintela --- include/migration/vmstate.h | 1 + migration/ram.c | 6 ++++++ migration/savevm.c | 6 ++++-- 3 files changed, 11 insertions(+), 2 deletions(-) diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h index 1638ee5..5c30ef7 100644 --- a/include/migration/vmstate.h +++ b/include/migration/vmstate.h @@ -46,6 +46,7 @@ typedef struct SaveVMHandlers { /* This runs both outside and inside the iothread lock. */ bool (*is_active)(void *opaque); + bool (*has_postcopy)(void *opaque); /* This runs outside the iothread lock in the migration case, and * within the lock in the savevm case. The callback had better only diff --git a/migration/ram.c b/migration/ram.c index 815bc0e..fa5c72b 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -2578,10 +2578,16 @@ static int ram_load(QEMUFile *f, void *opaque, int version_id) return ret; } +static bool ram_has_postcopy(void *opaque) +{ + return migrate_postcopy_ram(); +} + static SaveVMHandlers savevm_ram_handlers = { .save_live_setup = ram_save_setup, .save_live_iterate = ram_save_iterate, .save_live_complete_postcopy = ram_save_complete, + .has_postcopy = ram_has_postcopy, .save_live_complete_precopy = ram_save_complete, .save_live_pending = ram_save_pending, .load_state = ram_load, diff --git a/migration/savevm.c b/migration/savevm.c index 33a2911..d2efeeb 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -940,7 +940,8 @@ int qemu_savevm_state_iterate(QEMUFile *f, bool postcopy) * call that's already run, it might get confused if we call * iterate afterwards. */ - if (postcopy && !se->ops->save_live_complete_postcopy) { + if (postcopy && + !(se->ops->has_postcopy && se->ops->has_postcopy(se->opaque))) { continue; } if (qemu_file_rate_limit(f)) { @@ -1028,7 +1029,8 @@ void qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only) QTAILQ_FOREACH(se, &savevm_state.handlers, entry) { if (!se->ops || - (in_postcopy && se->ops->save_live_complete_postcopy) || + (in_postcopy && se->ops->has_postcopy && + se->ops->has_postcopy(se->opaque)) || (in_postcopy && !iterable_only) || !se->ops->save_live_complete_precopy) { continue;