From nobody Tue Feb 10 12:57:59 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1501230395955305.75786213984395; Fri, 28 Jul 2017 01:26:35 -0700 (PDT) Received: from localhost ([::1]:46752 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1db0bS-0004wO-Lo for importer@patchew.org; Fri, 28 Jul 2017 04:26:34 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47330) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1db0Jc-0001NQ-JC for qemu-devel@nongnu.org; Fri, 28 Jul 2017 04:08:09 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1db0Jb-0001Yv-Li for qemu-devel@nongnu.org; Fri, 28 Jul 2017 04:08:08 -0400 Received: from mx1.redhat.com ([209.132.183.28]:34020) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1db0Jb-0001YC-Cy for qemu-devel@nongnu.org; Fri, 28 Jul 2017 04:08:07 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 620EE2A2D0; Fri, 28 Jul 2017 08:08:06 +0000 (UTC) Received: from pxdev.xzpeter.org.com (dhcp-15-224.nay.redhat.com [10.66.15.224]) by smtp.corp.redhat.com (Postfix) with ESMTP id 3C1315B816; Fri, 28 Jul 2017 08:08:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 620EE2A2D0 Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx03.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=peterx@redhat.com From: Peter Xu To: qemu-devel@nongnu.org Date: Fri, 28 Jul 2017 16:06:30 +0800 Message-Id: <1501229198-30588-22-git-send-email-peterx@redhat.com> In-Reply-To: <1501229198-30588-1-git-send-email-peterx@redhat.com> References: <1501229198-30588-1-git-send-email-peterx@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Fri, 28 Jul 2017 08:08:06 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [RFC 21/29] migration: new cmd MIG_CMD_RECV_BITMAP 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: Laurent Vivier , Andrea Arcangeli , Juan Quintela , Alexey Perevalov , peterx@redhat.com, "Dr . David Alan Gilbert" Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Add a new vm command MIG_CMD_RECV_BITMAP to request received bitmap for one ramblock. Signed-off-by: Peter Xu Reviewed-by: Dr. David Alan Gilbert --- migration/savevm.c | 59 ++++++++++++++++++++++++++++++++++++++++++++++= ++++ migration/savevm.h | 1 + migration/trace-events | 1 + 3 files changed, 61 insertions(+) diff --git a/migration/savevm.c b/migration/savevm.c index 386788d..0ab13c0 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -78,6 +78,7 @@ enum qemu_vm_cmd { were previously sent during precopy but are dirty. */ MIG_CMD_PACKAGED, /* Send a wrapped stream within this stream= */ + MIG_CMD_RECV_BITMAP, /* Request for recved bitmap on dst */ MIG_CMD_MAX }; =20 @@ -95,6 +96,7 @@ static struct mig_cmd_args { [MIG_CMD_POSTCOPY_RAM_DISCARD] =3D { .len =3D -1, .name =3D "POSTCOPY_RAM_DI= SCARD" }, [MIG_CMD_PACKAGED] =3D { .len =3D 4, .name =3D "PACKAGED" }, + [MIG_CMD_RECV_BITMAP] =3D { .len =3D -1, .name =3D "RECV_BITMAP" = }, [MIG_CMD_MAX] =3D { .len =3D -1, .name =3D "MAX" }, }; =20 @@ -929,6 +931,19 @@ void qemu_savevm_send_postcopy_run(QEMUFile *f) qemu_savevm_command_send(f, MIG_CMD_POSTCOPY_RUN, 0, NULL); } =20 +void qemu_savevm_send_recv_bitmap(QEMUFile *f, char *block_name) +{ + size_t len; + char buf[512]; + + trace_savevm_send_recv_bitmap(block_name); + + buf[0] =3D len =3D strlen(block_name); + memcpy(buf + 1, block_name, len); + + qemu_savevm_command_send(f, MIG_CMD_RECV_BITMAP, len + 1, (uint8_t *)b= uf); +} + bool qemu_savevm_state_blocked(Error **errp) { SaveStateEntry *se; @@ -1705,6 +1720,47 @@ static int loadvm_handle_cmd_packaged(MigrationIncom= ingState *mis) } =20 /* + * Handle request that source requests for recved_bitmap on + * destination. Payload format: + * + * len (1 byte) + ramblock_name (<255 bytes) + */ +static int loadvm_handle_recv_bitmap(MigrationIncomingState *mis, + uint16_t len) +{ + QEMUFile *file =3D mis->from_src_file; + RAMBlock *rb; + char block_name[256]; + size_t cnt; + + cnt =3D qemu_get_counted_string(file, block_name); + if (!cnt) { + error_report("%s: failed to read block name", __func__); + return -EINVAL; + } + + /* Validate before using the data */ + if (qemu_file_get_error(file)) { + return qemu_file_get_error(file); + } + + if (len !=3D cnt + 1) { + error_report("%s: invalid payload length (%d)", __func__, len); + return -EINVAL; + } + + rb =3D qemu_ram_block_by_name(block_name); + if (!rb) { + error_report("%s: block '%s' not found", __func__, block_name); + return -EINVAL; + } + + /* TODO: send the bitmap back to source */ + + return 0; +} + +/* * Process an incoming 'QEMU_VM_COMMAND' * 0 just a normal return * LOADVM_QUIT All good, but exit the loop @@ -1777,6 +1833,9 @@ static int loadvm_process_command(QEMUFile *f) =20 case MIG_CMD_POSTCOPY_RAM_DISCARD: return loadvm_postcopy_ram_handle_discard(mis, len); + + case MIG_CMD_RECV_BITMAP: + return loadvm_handle_recv_bitmap(mis, len); } =20 return 0; diff --git a/migration/savevm.h b/migration/savevm.h index 295c4a1..8126b1c 100644 --- a/migration/savevm.h +++ b/migration/savevm.h @@ -46,6 +46,7 @@ int qemu_savevm_send_packaged(QEMUFile *f, const uint8_t = *buf, size_t len); void qemu_savevm_send_postcopy_advise(QEMUFile *f); void qemu_savevm_send_postcopy_listen(QEMUFile *f); void qemu_savevm_send_postcopy_run(QEMUFile *f); +void qemu_savevm_send_recv_bitmap(QEMUFile *f, char *block_name); =20 void qemu_savevm_send_postcopy_ram_discard(QEMUFile *f, const char *name, uint16_t len, diff --git a/migration/trace-events b/migration/trace-events index dbb4971..ca7b43f 100644 --- a/migration/trace-events +++ b/migration/trace-events @@ -34,6 +34,7 @@ savevm_send_open_return_path(void) "" savevm_send_ping(uint32_t val) "%x" savevm_send_postcopy_listen(void) "" savevm_send_postcopy_run(void) "" +savevm_send_recv_bitmap(char *name) "%s" savevm_state_setup(void) "" savevm_state_header(void) "" savevm_state_iterate(void) "" --=20 2.7.4