From patchwork Mon Sep 26 08:08:21 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavel Dovgalyuk X-Patchwork-Id: 9350247 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id A02B3601C2 for ; Mon, 26 Sep 2016 08:09:05 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9124C28AD1 for ; Mon, 26 Sep 2016 08:09:05 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 84F9F28B4F; Mon, 26 Sep 2016 08:09:05 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id A564028AD1 for ; Mon, 26 Sep 2016 08:09:04 +0000 (UTC) Received: from localhost ([::1]:42089 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1boQyF-0002XW-MJ for patchwork-qemu-devel@patchwork.kernel.org; Mon, 26 Sep 2016 04:09:03 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:41118) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1boQxe-0002UN-Q5 for qemu-devel@nongnu.org; Mon, 26 Sep 2016 04:08:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1boQxc-0005LM-QZ for qemu-devel@nongnu.org; Mon, 26 Sep 2016 04:08:26 -0400 Received: from mail.ispras.ru ([83.149.199.45]:49574) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1boQxc-0005KP-92 for qemu-devel@nongnu.org; Mon, 26 Sep 2016 04:08:24 -0400 Received: from [10.10.150.114] (unknown [85.142.117.224]) by mail.ispras.ru (Postfix) with ESMTPSA id BA058540071; Mon, 26 Sep 2016 11:08:21 +0300 (MSK) To: qemu-devel@nongnu.org From: Pavel Dovgalyuk Date: Mon, 26 Sep 2016 11:08:21 +0300 Message-ID: <20160926080821.6992.94562.stgit@PASHA-ISP> In-Reply-To: <20160926080757.6992.74311.stgit@PASHA-ISP> References: <20160926080757.6992.74311.stgit@PASHA-ISP> User-Agent: StGit/0.16 MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 83.149.199.45 Subject: [Qemu-devel] [PATCH v5 4/9] record/replay: add network support 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, mst@redhat.com, jasowang@redhat.com, quintela@redhat.com, pbonzini@redhat.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP This patch adds support of recording and replaying network packets in irount rr mode. Record and replay for network interactions is performed with the network filter. Each backend must have its own instance of the replay filter as follows: -netdev user,id=net1 -device rtl8139,netdev=net1 -object filter-replay,id=replay,netdev=net1 Replay network filter is used to record and replay network packets. While recording the virtual machine this filter puts all packets coming from the outer world into the log. In replay mode packets from the log are injected into the network device. All interactions with network backend in replay mode are disabled. v5 changes: - using iov_to_buf function instead of loop Signed-off-by: Pavel Dovgalyuk Reviewed-by: Jason Wang --- docs/replay.txt | 14 ++++++ include/sysemu/replay.h | 12 +++++ net/Makefile.objs | 1 net/filter-replay.c | 92 +++++++++++++++++++++++++++++++++++++++++ replay/Makefile.objs | 1 replay/replay-events.c | 11 +++++ replay/replay-internal.h | 10 +++++ replay/replay-net.c | 102 ++++++++++++++++++++++++++++++++++++++++++++++ replay/replay.c | 2 - vl.c | 3 + 10 files changed, 246 insertions(+), 2 deletions(-) create mode 100644 net/filter-replay.c create mode 100644 replay/replay-net.c diff --git a/docs/replay.txt b/docs/replay.txt index 779c6c0..347b2ff 100644 --- a/docs/replay.txt +++ b/docs/replay.txt @@ -195,3 +195,17 @@ Queue is flushed at checkpoints and information about processed requests is recorded to the log. In replay phase the queue is matched with events read from the log. Therefore block devices requests are processed deterministically. + +Network devices +--------------- + +Record and replay for network interactions is performed with the network filter. +Each backend must have its own instance of the replay filter as follows: + -netdev user,id=net1 -device rtl8139,netdev=net1 + -object filter-replay,id=replay,netdev=net1 + +Replay network filter is used to record and replay network packets. While +recording the virtual machine this filter puts all packets coming from +the outer world into the log. In replay mode packets from the log are +injected into the network device. All interactions with network backend +in replay mode are disabled. diff --git a/include/sysemu/replay.h b/include/sysemu/replay.h index f80d6d2..abb35ca 100644 --- a/include/sysemu/replay.h +++ b/include/sysemu/replay.h @@ -39,6 +39,8 @@ enum ReplayCheckpoint { }; typedef enum ReplayCheckpoint ReplayCheckpoint; +typedef struct ReplayNetState ReplayNetState; + extern ReplayMode replay_mode; /* Replay process control functions */ @@ -137,4 +139,14 @@ void replay_char_read_all_save_error(int res); /*! Writes character read_all execution result into the replay log. */ void replay_char_read_all_save_buf(uint8_t *buf, int offset); +/* Network */ + +/*! Registers replay network filter attached to some backend. */ +ReplayNetState *replay_register_net(NetFilterState *nfs); +/*! Unregisters replay network filter. */ +void replay_unregister_net(ReplayNetState *rns); +/*! Called to write network packet to the replay log. */ +void replay_net_packet_event(ReplayNetState *rns, unsigned flags, + const struct iovec *iov, int iovcnt); + #endif diff --git a/net/Makefile.objs b/net/Makefile.objs index b7c22fd..f787ba4 100644 --- a/net/Makefile.objs +++ b/net/Makefile.objs @@ -16,3 +16,4 @@ common-obj-$(CONFIG_NETMAP) += netmap.o common-obj-y += filter.o common-obj-y += filter-buffer.o common-obj-y += filter-mirror.o +common-obj-y += filter-replay.o diff --git a/net/filter-replay.c b/net/filter-replay.c new file mode 100644 index 0000000..cff65f8 --- /dev/null +++ b/net/filter-replay.c @@ -0,0 +1,92 @@ +/* + * filter-replay.c + * + * Copyright (c) 2010-2016 Institute for System Programming + * of the Russian Academy of Sciences. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include "clients.h" +#include "qapi/error.h" +#include "qemu-common.h" +#include "qemu/error-report.h" +#include "qemu/iov.h" +#include "qemu/log.h" +#include "qemu/timer.h" +#include "qapi/visitor.h" +#include "net/filter.h" +#include "sysemu/replay.h" + +#define TYPE_FILTER_REPLAY "filter-replay" + +#define FILTER_REPLAY(obj) \ + OBJECT_CHECK(NetFilterReplayState, (obj), TYPE_FILTER_REPLAY) + +struct NetFilterReplayState { + NetFilterState nfs; + ReplayNetState *rns; +}; +typedef struct NetFilterReplayState NetFilterReplayState; + +static ssize_t filter_replay_receive_iov(NetFilterState *nf, + NetClientState *sndr, + unsigned flags, + const struct iovec *iov, + int iovcnt, NetPacketSent *sent_cb) +{ + NetFilterReplayState *nfrs = FILTER_REPLAY(nf); + switch (replay_mode) { + case REPLAY_MODE_RECORD: + if (nf->netdev == sndr) { + replay_net_packet_event(nfrs->rns, flags, iov, iovcnt); + return iov_size(iov, iovcnt); + } + return 0; + case REPLAY_MODE_PLAY: + /* Drop all packets in replay mode. + Packets from the log will be injected by the replay module. */ + return iov_size(iov, iovcnt); + default: + /* Pass all the packets. */ + return 0; + } +} + +static void filter_replay_instance_init(Object *obj) +{ + NetFilterReplayState *nfrs = FILTER_REPLAY(obj); + nfrs->rns = replay_register_net(&nfrs->nfs); +} + +static void filter_replay_instance_finalize(Object *obj) +{ + NetFilterReplayState *nfrs = FILTER_REPLAY(obj); + replay_unregister_net(nfrs->rns); +} + +static void filter_replay_class_init(ObjectClass *oc, void *data) +{ + NetFilterClass *nfc = NETFILTER_CLASS(oc); + + nfc->receive_iov = filter_replay_receive_iov; +} + +static const TypeInfo filter_replay_info = { + .name = TYPE_FILTER_REPLAY, + .parent = TYPE_NETFILTER, + .class_init = filter_replay_class_init, + .instance_init = filter_replay_instance_init, + .instance_finalize = filter_replay_instance_finalize, + .instance_size = sizeof(NetFilterReplayState), +}; + +static void filter_replay_register_types(void) +{ + type_register_static(&filter_replay_info); +} + +type_init(filter_replay_register_types); diff --git a/replay/Makefile.objs b/replay/Makefile.objs index c8ad3eb..b2afd40 100644 --- a/replay/Makefile.objs +++ b/replay/Makefile.objs @@ -5,3 +5,4 @@ common-obj-y += replay-time.o common-obj-y += replay-input.o common-obj-y += replay-char.o common-obj-y += replay-snapshot.o +common-obj-y += replay-net.o diff --git a/replay/replay-events.c b/replay/replay-events.c index c513913..94a6dcc 100644 --- a/replay/replay-events.c +++ b/replay/replay-events.c @@ -54,6 +54,9 @@ static void replay_run_event(Event *event) case REPLAY_ASYNC_EVENT_BLOCK: aio_bh_call(event->opaque); break; + case REPLAY_ASYNC_EVENT_NET: + replay_event_net_run(event->opaque); + break; default: error_report("Replay: invalid async event ID (%d) in the queue", event->event_kind); @@ -189,6 +192,9 @@ static void replay_save_event(Event *event, int checkpoint) case REPLAY_ASYNC_EVENT_BLOCK: replay_put_qword(event->id); break; + case REPLAY_ASYNC_EVENT_NET: + replay_event_net_save(event->opaque); + break; default: error_report("Unknown ID %" PRId64 " of replay event", event->id); exit(1); @@ -252,6 +258,11 @@ static Event *replay_read_event(int checkpoint) read_id = replay_get_qword(); } break; + case REPLAY_ASYNC_EVENT_NET: + event = g_malloc0(sizeof(Event)); + event->event_kind = read_event_kind; + event->opaque = replay_event_net_load(); + return event; default: error_report("Unknown ID %d of replay event", read_event_kind); exit(1); diff --git a/replay/replay-internal.h b/replay/replay-internal.h index 9117e44..c26d079 100644 --- a/replay/replay-internal.h +++ b/replay/replay-internal.h @@ -50,6 +50,7 @@ enum ReplayAsyncEventKind { REPLAY_ASYNC_EVENT_INPUT_SYNC, REPLAY_ASYNC_EVENT_CHAR_READ, REPLAY_ASYNC_EVENT_BLOCK, + REPLAY_ASYNC_EVENT_NET, REPLAY_ASYNC_COUNT }; @@ -161,6 +162,15 @@ void replay_event_char_read_save(void *opaque); /*! Reads char event read from the file. */ void *replay_event_char_read_load(void); +/* Network devices */ + +/*! Called to run network event. */ +void replay_event_net_run(void *opaque); +/*! Writes network event to the file. */ +void replay_event_net_save(void *opaque); +/*! Reads network from the file. */ +void *replay_event_net_load(void); + /* VMState-related functions */ /* Registers replay VMState. diff --git a/replay/replay-net.c b/replay/replay-net.c new file mode 100644 index 0000000..0838eab --- /dev/null +++ b/replay/replay-net.c @@ -0,0 +1,102 @@ +/* + * replay-net.c + * + * Copyright (c) 2010-2016 Institute for System Programming + * of the Russian Academy of Sciences. + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include "qemu/error-report.h" +#include "sysemu/replay.h" +#include "replay-internal.h" +#include "sysemu/sysemu.h" +#include "net/net.h" +#include "net/filter.h" +#include "qemu/iov.h" + +struct ReplayNetState { + NetFilterState *nfs; + int id; +}; + +typedef struct NetEvent { + uint8_t id; + uint32_t flags; + uint8_t *data; + size_t size; +} NetEvent; + +static NetFilterState **network_filters; +static int network_filters_count; + +ReplayNetState *replay_register_net(NetFilterState *nfs) +{ + ReplayNetState *rns = g_new0(ReplayNetState, 1); + rns->nfs = nfs; + rns->id = network_filters_count++; + network_filters = g_realloc(network_filters, + network_filters_count + * sizeof(*network_filters)); + network_filters[network_filters_count - 1] = nfs; + return rns; +} + +void replay_unregister_net(ReplayNetState *rns) +{ + network_filters[rns->id] = NULL; + g_free(rns); +} + +void replay_net_packet_event(ReplayNetState *rns, unsigned flags, + const struct iovec *iov, int iovcnt) +{ + NetEvent *event = g_new(NetEvent, 1); + event->flags = flags; + event->data = g_malloc(iov_size(iov, iovcnt)); + event->size = iov_size(iov, iovcnt); + event->id = rns->id; + iov_to_buf(iov, iovcnt, 0, event->data, event->size); + + replay_add_event(REPLAY_ASYNC_EVENT_NET, event, NULL, 0); +} + +void replay_event_net_run(void *opaque) +{ + NetEvent *event = opaque; + struct iovec iov = { + .iov_base = (void *)event->data, + .iov_len = event->size + }; + + assert(event->id < network_filters_count); + + qemu_netfilter_pass_to_next(network_filters[event->id]->netdev, + event->flags, &iov, 1, network_filters[event->id]); + + g_free(event->data); + g_free(event); +} + +void replay_event_net_save(void *opaque) +{ + NetEvent *event = opaque; + + replay_put_byte(event->id); + replay_put_dword(event->flags); + replay_put_array(event->data, event->size); +} + +void *replay_event_net_load(void) +{ + NetEvent *event = g_new(NetEvent, 1); + + event->id = replay_get_byte(); + event->flags = replay_get_dword(); + replay_get_array_alloc(&event->data, &event->size); + + return event; +} diff --git a/replay/replay.c b/replay/replay.c index c797aea..7f27cf1 100644 --- a/replay/replay.c +++ b/replay/replay.c @@ -21,7 +21,7 @@ /* Current version of the replay mechanism. Increase it when file format changes. */ -#define REPLAY_VERSION 0xe02004 +#define REPLAY_VERSION 0xe02005 /* Size of replay log header */ #define HEADER_SIZE (sizeof(uint32_t) + sizeof(uint64_t)) diff --git a/vl.c b/vl.c index c92e319..1298be1 100644 --- a/vl.c +++ b/vl.c @@ -2808,7 +2808,8 @@ static bool object_create_initial(const char *type) if (g_str_equal(type, "filter-buffer") || g_str_equal(type, "filter-dump") || g_str_equal(type, "filter-mirror") || - g_str_equal(type, "filter-redirector")) { + g_str_equal(type, "filter-redirector") || + g_str_equal(type, "filter-replay")) { return false; }