From patchwork Tue Mar 7 07:07:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jason Wang X-Patchwork-Id: 13162950 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id C85AFC678D4 for ; Tue, 7 Mar 2023 07:16:24 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1pZRST-00016d-Sh; Tue, 07 Mar 2023 02:10:01 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pZRSS-00012V-HN for qemu-devel@nongnu.org; Tue, 07 Mar 2023 02:10:00 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pZRSQ-0005VW-Ox for qemu-devel@nongnu.org; Tue, 07 Mar 2023 02:10:00 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1678172998; 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=qXn9/2GiqSyQmfcNr+QM084DhjBQtlYvWAtQV3RBiDo=; b=h1k4qQydKTSp+fcYL5fMmsJNTs+Ka+I/Tb9XEtpph8iqiTcd3iHHIxRcE6j8NQ4l7HpCEB DZb8w0P++JvlRf55bzrb0JU1Ppd4fkegXe0vDm9yUFdpR1hA2BOKh4/I5NWnRVMNk2iXTy 5J6J8HwUnDyXKGrLFZ6PVL8fB9tH9gw= Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-403-C-V1-gdROCWZLWBpcIw6gQ-1; Tue, 07 Mar 2023 02:09:55 -0500 X-MC-Unique: C-V1-gdROCWZLWBpcIw6gQ-1 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.rdu2.redhat.com [10.11.54.2]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id A32EF2808E60; Tue, 7 Mar 2023 07:09:54 +0000 (UTC) Received: from localhost.localdomain (ovpn-12-78.pek2.redhat.com [10.72.12.78]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9CF6D400F8FA; Tue, 7 Mar 2023 07:09:52 +0000 (UTC) From: Jason Wang To: qemu-devel@nongnu.org, peter.maydell@linaro.org Cc: Akihiko Odaki , Jason Wang Subject: [PULL 21/51] net: Strip virtio-net header when dumping Date: Tue, 7 Mar 2023 15:07:46 +0800 Message-Id: <20230307070816.34833-22-jasowang@redhat.com> In-Reply-To: <20230307070816.34833-1-jasowang@redhat.com> References: <20230307070816.34833-1-jasowang@redhat.com> MIME-Version: 1.0 Content-type: text/plain X-Scanned-By: MIMEDefang 3.1 on 10.11.54.2 Received-SPF: pass client-ip=170.10.129.124; envelope-from=jasowang@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Akihiko Odaki filter-dump specifiees Ethernet as PCAP LinkType, which does not expect virtio-net header. Having virtio-net header in such PCAP file breaks PCAP unconsumable. Unfortunately currently there is no LinkType for virtio-net so for now strip virtio-net header to convert the output to Ethernet. Signed-off-by: Akihiko Odaki Signed-off-by: Jason Wang --- include/net/net.h | 6 ++++++ net/dump.c | 11 +++++++---- net/net.c | 18 ++++++++++++++++++ net/tap.c | 16 ++++++++++++++++ 4 files changed, 47 insertions(+), 4 deletions(-) diff --git a/include/net/net.h b/include/net/net.h index 1d88621..1448d00 100644 --- a/include/net/net.h +++ b/include/net/net.h @@ -56,8 +56,10 @@ typedef RxFilterInfo *(QueryRxFilter)(NetClientState *); typedef bool (HasUfo)(NetClientState *); typedef bool (HasVnetHdr)(NetClientState *); typedef bool (HasVnetHdrLen)(NetClientState *, int); +typedef bool (GetUsingVnetHdr)(NetClientState *); typedef void (UsingVnetHdr)(NetClientState *, bool); typedef void (SetOffload)(NetClientState *, int, int, int, int, int); +typedef int (GetVnetHdrLen)(NetClientState *); typedef void (SetVnetHdrLen)(NetClientState *, int); typedef int (SetVnetLE)(NetClientState *, bool); typedef int (SetVnetBE)(NetClientState *, bool); @@ -84,8 +86,10 @@ typedef struct NetClientInfo { HasUfo *has_ufo; HasVnetHdr *has_vnet_hdr; HasVnetHdrLen *has_vnet_hdr_len; + GetUsingVnetHdr *get_using_vnet_hdr; UsingVnetHdr *using_vnet_hdr; SetOffload *set_offload; + GetVnetHdrLen *get_vnet_hdr_len; SetVnetHdrLen *set_vnet_hdr_len; SetVnetLE *set_vnet_le; SetVnetBE *set_vnet_be; @@ -185,9 +189,11 @@ void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6]); bool qemu_has_ufo(NetClientState *nc); bool qemu_has_vnet_hdr(NetClientState *nc); bool qemu_has_vnet_hdr_len(NetClientState *nc, int len); +bool qemu_get_using_vnet_hdr(NetClientState *nc); void qemu_using_vnet_hdr(NetClientState *nc, bool enable); void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6, int ecn, int ufo); +int qemu_get_vnet_hdr_len(NetClientState *nc); void qemu_set_vnet_hdr_len(NetClientState *nc, int len); int qemu_set_vnet_le(NetClientState *nc, bool is_le); int qemu_set_vnet_be(NetClientState *nc, bool is_be); diff --git a/net/dump.c b/net/dump.c index 6a63b15..7d05f16 100644 --- a/net/dump.c +++ b/net/dump.c @@ -61,12 +61,13 @@ struct pcap_sf_pkthdr { uint32_t len; }; -static ssize_t dump_receive_iov(DumpState *s, const struct iovec *iov, int cnt) +static ssize_t dump_receive_iov(DumpState *s, const struct iovec *iov, int cnt, + int offset) { struct pcap_sf_pkthdr hdr; int64_t ts; int caplen; - size_t size = iov_size(iov, cnt); + size_t size = iov_size(iov, cnt) - offset; struct iovec dumpiov[cnt + 1]; /* Early return in case of previous error. */ @@ -84,7 +85,7 @@ static ssize_t dump_receive_iov(DumpState *s, const struct iovec *iov, int cnt) dumpiov[0].iov_base = &hdr; dumpiov[0].iov_len = sizeof(hdr); - cnt = iov_copy(&dumpiov[1], cnt, iov, cnt, 0, caplen); + cnt = iov_copy(&dumpiov[1], cnt, iov, cnt, offset, caplen); if (writev(s->fd, dumpiov, cnt + 1) != sizeof(hdr) + caplen) { error_report("network dump write error - stopping dump"); @@ -153,8 +154,10 @@ static ssize_t filter_dump_receive_iov(NetFilterState *nf, NetClientState *sndr, int iovcnt, NetPacketSent *sent_cb) { NetFilterDumpState *nfds = FILTER_DUMP(nf); + int offset = qemu_get_using_vnet_hdr(nf->netdev) ? + qemu_get_vnet_hdr_len(nf->netdev) : 0; - dump_receive_iov(&nfds->ds, iov, iovcnt); + dump_receive_iov(&nfds->ds, iov, iovcnt, offset); return 0; } diff --git a/net/net.c b/net/net.c index ebc7ce0..6492ad5 100644 --- a/net/net.c +++ b/net/net.c @@ -513,6 +513,15 @@ bool qemu_has_vnet_hdr_len(NetClientState *nc, int len) return nc->info->has_vnet_hdr_len(nc, len); } +bool qemu_get_using_vnet_hdr(NetClientState *nc) +{ + if (!nc || !nc->info->get_using_vnet_hdr) { + return false; + } + + return nc->info->get_using_vnet_hdr(nc); +} + void qemu_using_vnet_hdr(NetClientState *nc, bool enable) { if (!nc || !nc->info->using_vnet_hdr) { @@ -532,6 +541,15 @@ void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6, nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo); } +int qemu_get_vnet_hdr_len(NetClientState *nc) +{ + if (!nc || !nc->info->get_vnet_hdr_len) { + return 0; + } + + return nc->info->get_vnet_hdr_len(nc); +} + void qemu_set_vnet_hdr_len(NetClientState *nc, int len) { if (!nc || !nc->info->set_vnet_hdr_len) { diff --git a/net/tap.c b/net/tap.c index 7d7bc1d..1bf085d 100644 --- a/net/tap.c +++ b/net/tap.c @@ -255,6 +255,13 @@ static bool tap_has_vnet_hdr_len(NetClientState *nc, int len) return !!tap_probe_vnet_hdr_len(s->fd, len); } +static int tap_get_vnet_hdr_len(NetClientState *nc) +{ + TAPState *s = DO_UPCAST(TAPState, nc, nc); + + return s->host_vnet_hdr_len; +} + static void tap_set_vnet_hdr_len(NetClientState *nc, int len) { TAPState *s = DO_UPCAST(TAPState, nc, nc); @@ -268,6 +275,13 @@ static void tap_set_vnet_hdr_len(NetClientState *nc, int len) s->host_vnet_hdr_len = len; } +static bool tap_get_using_vnet_hdr(NetClientState *nc) +{ + TAPState *s = DO_UPCAST(TAPState, nc, nc); + + return s->using_vnet_hdr; +} + static void tap_using_vnet_hdr(NetClientState *nc, bool using_vnet_hdr) { TAPState *s = DO_UPCAST(TAPState, nc, nc); @@ -372,8 +386,10 @@ static NetClientInfo net_tap_info = { .has_ufo = tap_has_ufo, .has_vnet_hdr = tap_has_vnet_hdr, .has_vnet_hdr_len = tap_has_vnet_hdr_len, + .get_using_vnet_hdr = tap_get_using_vnet_hdr, .using_vnet_hdr = tap_using_vnet_hdr, .set_offload = tap_set_offload, + .get_vnet_hdr_len = tap_get_vnet_hdr_len, .set_vnet_hdr_len = tap_set_vnet_hdr_len, .set_vnet_le = tap_set_vnet_le, .set_vnet_be = tap_set_vnet_be,