From patchwork Wed Dec 18 02:01:16 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Juan Quintela X-Patchwork-Id: 11299343 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 605B913B6 for ; Wed, 18 Dec 2019 02:08:26 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 261CA21582 for ; Wed, 18 Dec 2019 02:08:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="g/mQBGqV" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 261CA21582 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:48476 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ihOlF-0002tG-1j for patchwork-qemu-devel@patchwork.kernel.org; Tue, 17 Dec 2019 21:08:25 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:52564) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ihOeo-00032X-FZ for qemu-devel@nongnu.org; Tue, 17 Dec 2019 21:01:48 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ihOem-0005nz-H8 for qemu-devel@nongnu.org; Tue, 17 Dec 2019 21:01:46 -0500 Received: from us-smtp-delivery-1.mimecast.com ([205.139.110.120]:21843 helo=us-smtp-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1ihOel-0005mc-U0 for qemu-devel@nongnu.org; Tue, 17 Dec 2019 21:01:44 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1576634503; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=JCF79OgkifHXkDZ6UIDSsQbkPYWximap7jUWIkoikGY=; b=g/mQBGqVjN7AU7GZau2PD7WqGQfod28jZf7gHUj2UXbAvohM8R1JP0XMSx7Se/xNeuG52V T0dcKTmUGDuHyrB5KBCS+hMSCwarxx+OzaccuXJH1hK7coe9gMTvWbrLb8Hf2DWihTcLwX FIevqRxEWsMrWynisxt0GXSDLA6wuGg= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-108-RadDFdAPPACTLQ1MIch5EA-1; Tue, 17 Dec 2019 21:01:41 -0500 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 1CD3C1809A2A for ; Wed, 18 Dec 2019 02:01:41 +0000 (UTC) Received: from secure.mitica (ovpn-116-32.ams2.redhat.com [10.36.116.32]) by smtp.corp.redhat.com (Postfix) with ESMTP id D523819C58; Wed, 18 Dec 2019 02:01:38 +0000 (UTC) From: Juan Quintela To: qemu-devel@nongnu.org Subject: [PATCH v2 07/10] migration: Make no compression operations into its own structure Date: Wed, 18 Dec 2019 03:01:16 +0100 Message-Id: <20191218020119.3776-8-quintela@redhat.com> In-Reply-To: <20191218020119.3776-1-quintela@redhat.com> References: <20191218020119.3776-1-quintela@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 X-MC-Unique: RadDFdAPPACTLQ1MIch5EA-1 X-Mimecast-Spam-Score: 0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 205.139.110.120 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , Thomas Huth , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , Eduardo Habkost , Juan Quintela , "Dr. David Alan Gilbert" , Markus Armbruster , Paolo Bonzini Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" It will be used later. Signed-off-by: Juan Quintela --- Move setup of ->ops helper to proper place (wei) Rename s/none/nocomp/ (dave) Introduce MULTIFD_FLAG_NOCOMP --- migration/migration.c | 9 ++ migration/migration.h | 1 + migration/ram.c | 194 ++++++++++++++++++++++++++++++++++++++++-- 3 files changed, 196 insertions(+), 8 deletions(-) diff --git a/migration/migration.c b/migration/migration.c index 93c6ed10a6..56203eb536 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -2213,6 +2213,15 @@ int migrate_multifd_channels(void) return s->parameters.multifd_channels; } +int migrate_multifd_method(void) +{ + MigrationState *s; + + s = migrate_get_current(); + + return s->parameters.multifd_compress; +} + int migrate_use_xbzrle(void) { MigrationState *s; diff --git a/migration/migration.h b/migration/migration.h index 545f283ae7..d3ea45e25a 100644 --- a/migration/migration.h +++ b/migration/migration.h @@ -299,6 +299,7 @@ bool migrate_auto_converge(void); bool migrate_use_multifd(void); bool migrate_pause_before_switchover(void); int migrate_multifd_channels(void); +int migrate_multifd_method(void); int migrate_use_xbzrle(void); int64_t migrate_xbzrle_cache_size(void); diff --git a/migration/ram.c b/migration/ram.c index fcf50e648a..10661e03ae 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -44,6 +44,7 @@ #include "page_cache.h" #include "qemu/error-report.h" #include "qapi/error.h" +#include "qapi/qapi-types-migration.h" #include "qapi/qapi-events-migration.h" #include "qapi/qmp/qerror.h" #include "trace.h" @@ -581,6 +582,7 @@ exit: #define MULTIFD_VERSION 1 #define MULTIFD_FLAG_SYNC (1 << 0) +#define MULTIFD_FLAG_NOCOMP (1 << 1) /* This value needs to be a multiple of qemu_target_page_size() */ #define MULTIFD_PACKET_SIZE (512 * 1024) @@ -662,6 +664,8 @@ typedef struct { uint64_t num_pages; /* syncs main thread and channels */ QemuSemaphore sem_sync; + /* used for compression methods */ + void *data; } MultiFDSendParams; typedef struct { @@ -699,8 +703,153 @@ typedef struct { uint64_t num_pages; /* syncs main thread and channels */ QemuSemaphore sem_sync; + /* used for de-compression methods */ + void *data; } MultiFDRecvParams; +typedef struct { + /* Setup for sending side */ + int (*send_setup)(MultiFDSendParams *p, Error **errp); + /* Cleanup for sending side */ + void (*send_cleanup)(MultiFDSendParams *p, Error **errp); + /* Prepare the send packet */ + int (*send_prepare)(MultiFDSendParams *p, uint32_t used, Error **errp); + /* Write the send packet */ + int (*send_write)(MultiFDSendParams *p, uint32_t used, Error **errp); + /* Setup for receiving side */ + int (*recv_setup)(MultiFDRecvParams *p, Error **errp); + /* Cleanup for receiving side */ + void (*recv_cleanup)(MultiFDRecvParams *p); + /* Read all pages */ + int (*recv_pages)(MultiFDRecvParams *p, uint32_t used, Error **errp); +} MultiFDMethods; + +/* Multifd without compression */ + +/** + * nocomp_send_setup: setup send side + * + * For no compression this function does nothing. + * + * Returns 0 for success or -1 for error + * + * @p: Params for the channel that we are using + * @errp: pointer to an error + */ +static int nocomp_send_setup(MultiFDSendParams *p, Error **errp) +{ + return 0; +} + +/** + * nocomp_send_cleanup: cleanup send side + * + * For no compression this function does nothing. + * + * @p: Params for the channel that we are using + */ +static void nocomp_send_cleanup(MultiFDSendParams *p, Error **errp) +{ + return; +} + +/** + * nocomp_send_prepare: prepare date to be able to send + * + * For no compression we just have to calculate the size of the + * packet. + * + * Returns 0 for success or -1 for error + * + * @p: Params for the channel that we are using + * @used: number of pages used + * @errp: pointer to an error + */ +static int nocomp_send_prepare(MultiFDSendParams *p, uint32_t used, + Error **errp) +{ + p->next_packet_size = used * qemu_target_page_size(); + p->flags |= MULTIFD_FLAG_NOCOMP; + return 0; +} + +/** + * nocomp_send_write: do the actual write of the data + * + * For no compression we just have to write the data. + * + * Returns 0 for success or -1 for error + * + * @p: Params for the channel that we are using + * @used: number of pages used + * @errp: pointer to an error + */ +static int nocomp_send_write(MultiFDSendParams *p, uint32_t used, Error **errp) +{ + return qio_channel_writev_all(p->c, p->pages->iov, used, errp); +} + +/** + * nocomp_recv_setup: setup receive side + * + * For no compression this function does nothing. + * + * Returns 0 for success or -1 for error + * + * @p: Params for the channel that we are using + * @errp: pointer to an error + */ +static int nocomp_recv_setup(MultiFDRecvParams *p, Error **errp) +{ + return 0; +} + +/** + * nocomp_recv_cleanup: setup receive side + * + * For no compression this function does nothing. + * + * @p: Params for the channel that we are using + */ +static void nocomp_recv_cleanup(MultiFDRecvParams *p) +{ +} + +/** + * nocomp_recv_pages: read the data from the channel into actual pages + * + * For no compression we just need to read things into the correct place. + * + * Returns 0 for success or -1 for error + * + * @p: Params for the channel that we are using + * @used: number of pages used + * @errp: pointer to an error + */ +static int nocomp_recv_pages(MultiFDRecvParams *p, uint32_t used, Error **errp) +{ + if (p->flags != MULTIFD_FLAG_NOCOMP) { + error_setg(errp, "multifd %d: flags received %x flags expected %x", + p->id, MULTIFD_FLAG_NOCOMP, p->flags); + return -1; + } + return qio_channel_readv_all(p->c, p->pages->iov, used, errp); +} + +static MultiFDMethods multifd_nocomp_ops = { + .send_setup = nocomp_send_setup, + .send_cleanup = nocomp_send_cleanup, + .send_prepare = nocomp_send_prepare, + .send_write = nocomp_send_write, + .recv_setup = nocomp_recv_setup, + .recv_cleanup = nocomp_recv_cleanup, + .recv_pages = nocomp_recv_pages +}; + +static MultiFDMethods *multifd_ops[MULTIFD_COMPRESS__MAX] = { + [MULTIFD_COMPRESS_NONE] = &multifd_nocomp_ops, +}; + static int multifd_send_initial_packet(MultiFDSendParams *p, Error **errp) { MultiFDInit_t msg; @@ -898,6 +1047,8 @@ struct { uint64_t packet_num; /* send channels ready */ QemuSemaphore channels_ready; + /* multifd ops */ + MultiFDMethods *ops; } *multifd_send_state; /* @@ -1027,6 +1178,7 @@ void multifd_save_cleanup(void) multifd_send_terminate_threads(NULL); for (i = 0; i < migrate_multifd_channels(); i++) { MultiFDSendParams *p = &multifd_send_state->params[i]; + Error *local_err = NULL; if (p->running) { qemu_thread_join(&p->thread); @@ -1043,6 +1195,10 @@ void multifd_save_cleanup(void) p->packet_len = 0; g_free(p->packet); p->packet = NULL; + multifd_send_state->ops->send_cleanup(p, &local_err); + if (local_err) { + migrate_set_error(migrate_get_current(), local_err); + } } qemu_sem_destroy(&multifd_send_state->channels_ready); g_free(multifd_send_state->params); @@ -1123,7 +1279,14 @@ static void *multifd_send_thread(void *opaque) uint64_t packet_num = p->packet_num; flags = p->flags; - p->next_packet_size = used * qemu_target_page_size(); + if (used) { + ret = multifd_send_state->ops->send_prepare(p, used, + &local_err); + if (ret != 0) { + qemu_mutex_unlock(&p->mutex); + break; + } + } multifd_send_fill_packet(p); p->flags = 0; p->num_packets++; @@ -1140,8 +1303,7 @@ static void *multifd_send_thread(void *opaque) } if (used) { - ret = qio_channel_writev_all(p->c, p->pages->iov, - used, &local_err); + ret = multifd_send_state->ops->send_write(p, used, &local_err); if (ret != 0) { break; } @@ -1212,6 +1374,7 @@ int multifd_save_setup(Error **errp) { int thread_count; uint32_t page_count = MULTIFD_PACKET_SIZE / qemu_target_page_size(); + int ret = 0; uint8_t i; if (!migrate_use_multifd()) { @@ -1222,9 +1385,11 @@ int multifd_save_setup(Error **errp) multifd_send_state->params = g_new0(MultiFDSendParams, thread_count); multifd_send_state->pages = multifd_pages_init(page_count); qemu_sem_init(&multifd_send_state->channels_ready, 0); + multifd_send_state->ops = multifd_ops[migrate_multifd_method()]; for (i = 0; i < thread_count; i++) { MultiFDSendParams *p = &multifd_send_state->params[i]; + int res; qemu_mutex_init(&p->mutex); qemu_sem_init(&p->sem, 0); @@ -1240,8 +1405,12 @@ int multifd_save_setup(Error **errp) p->packet->version = cpu_to_be32(MULTIFD_VERSION); p->name = g_strdup_printf("multifdsend_%d", i); socket_send_channel_create(multifd_new_send_channel_async, p); + res = multifd_send_state->ops->send_setup(p, errp); + if (ret == 0) { + ret = res; + } } - return 0; + return ret; } struct { @@ -1252,6 +1421,8 @@ struct { QemuSemaphore sem_sync; /* global number of generated multifd packets */ uint64_t packet_num; + /* multifd ops */ + MultiFDMethods *ops; } *multifd_recv_state; static void multifd_recv_terminate_threads(Error *err) @@ -1287,7 +1458,6 @@ static void multifd_recv_terminate_threads(Error *err) int multifd_load_cleanup(Error **errp) { int i; - int ret = 0; if (!migrate_use_multifd()) { return 0; @@ -1316,6 +1486,7 @@ int multifd_load_cleanup(Error **errp) p->packet_len = 0; g_free(p->packet); p->packet = NULL; + multifd_recv_state->ops->recv_cleanup(p); } qemu_sem_destroy(&multifd_recv_state->sem_sync); g_free(multifd_recv_state->params); @@ -1323,7 +1494,7 @@ int multifd_load_cleanup(Error **errp) g_free(multifd_recv_state); multifd_recv_state = NULL; - return ret; + return 0; } static void multifd_recv_sync_main(void) @@ -1388,6 +1559,8 @@ static void *multifd_recv_thread(void *opaque) used = p->pages->used; flags = p->flags; + /* recv methods don't know how to handle the SYNC flag */ + p->flags &= ~MULTIFD_FLAG_SYNC; trace_multifd_recv(p->id, p->packet_num, used, flags, p->next_packet_size); p->num_packets++; @@ -1395,8 +1568,7 @@ static void *multifd_recv_thread(void *opaque) qemu_mutex_unlock(&p->mutex); if (used) { - ret = qio_channel_readv_all(p->c, p->pages->iov, - used, &local_err); + ret = multifd_recv_state->ops->recv_pages(p, used, &local_err); if (ret != 0) { break; } @@ -1435,9 +1607,11 @@ int multifd_load_setup(Error **errp) multifd_recv_state->params = g_new0(MultiFDRecvParams, thread_count); atomic_set(&multifd_recv_state->count, 0); qemu_sem_init(&multifd_recv_state->sem_sync, 0); + multifd_recv_state->ops = multifd_ops[migrate_multifd_method()]; for (i = 0; i < thread_count; i++) { MultiFDRecvParams *p = &multifd_recv_state->params[i]; + int ret; qemu_mutex_init(&p->mutex); qemu_sem_init(&p->sem_sync, 0); @@ -1448,6 +1622,10 @@ int multifd_load_setup(Error **errp) + sizeof(ram_addr_t) * page_count; p->packet = g_malloc0(p->packet_len); p->name = g_strdup_printf("multifdrecv_%d", i); + ret = multifd_recv_state->ops->recv_setup(p, errp); + if (ret != 0) { + return ret; + } } return 0; }