From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33862) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d42Ux-0004f4-68 for qemu-devel@nongnu.org; Fri, 28 Apr 2017 05:47:36 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1d42Ut-0001Ti-Av for qemu-devel@nongnu.org; Fri, 28 Apr 2017 05:47:35 -0400 Received: from [59.151.112.132] (port=20529 helo=heian.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1d42Us-0001QC-Ul for qemu-devel@nongnu.org; Fri, 28 Apr 2017 05:47:31 -0400 From: Zhang Chen Date: Fri, 28 Apr 2017 17:47:14 +0800 Message-ID: <1493372840-24551-5-git-send-email-zhangchen.fnst@cn.fujitsu.com> In-Reply-To: <1493372840-24551-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> References: <1493372840-24551-1-git-send-email-zhangchen.fnst@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH V3 04/10] net/filter-mirror.c: Add filter-mirror and filter-redirector vnet support. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu devel , Jason Wang Cc: Zhang Chen , zhanghailiang , weifuqiang , "eddie . dong" , bian naimeng , Li Zhijian In this patch, we change the send packet format from struct {int size; const uint8_t buf[];} to {int size; int vnet_hdr_len; const uint8_t buf[];}. make other module(like colo-compare) know how to parse net packet correctly. Signed-off-by: Zhang Chen --- net/filter-mirror.c | 28 +++++++++++++++++++++++----- 1 file changed, 23 insertions(+), 5 deletions(-) diff --git a/net/filter-mirror.c b/net/filter-mirror.c index 72fa7c2..bb9ecf3 100644 --- a/net/filter-mirror.c +++ b/net/filter-mirror.c @@ -43,12 +43,14 @@ typedef struct MirrorState { SocketReadState rs; } MirrorState; -static int filter_mirror_send(CharBackend *chr_out, +static int filter_mirror_send(MirrorState *s, const struct iovec *iov, int iovcnt) { + NetFilterState *nf = NETFILTER(s); int ret = 0; ssize_t size = 0; + ssize_t vnet_hdr_len; uint32_t len = 0; char *buf; @@ -58,14 +60,30 @@ static int filter_mirror_send(CharBackend *chr_out, } len = htonl(size); - ret = qemu_chr_fe_write_all(chr_out, (uint8_t *)&len, sizeof(len)); + ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)&len, sizeof(len)); + if (ret != sizeof(len)) { + goto err; + } + + /* + * We send vnet header len make other module(like colo-compare) + * know how to parse net packet correctly. + */ + if (qemu_get_using_vnet_hdr(nf->netdev)) { + vnet_hdr_len = qemu_get_vnet_hdr_len(nf->netdev); + } else { + vnet_hdr_len = qemu_get_vnet_hdr_len(nf->netdev->peer); + } + + len = htonl(vnet_hdr_len); + ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)&len, sizeof(len)); if (ret != sizeof(len)) { goto err; } buf = g_malloc(size); iov_to_buf(iov, iovcnt, 0, buf, size); - ret = qemu_chr_fe_write_all(chr_out, (uint8_t *)buf, size); + ret = qemu_chr_fe_write_all(&s->chr_out, (uint8_t *)buf, size); g_free(buf); if (ret != size) { goto err; @@ -141,7 +159,7 @@ static ssize_t filter_mirror_receive_iov(NetFilterState *nf, MirrorState *s = FILTER_MIRROR(nf); int ret; - ret = filter_mirror_send(&s->chr_out, iov, iovcnt); + ret = filter_mirror_send(s, iov, iovcnt); if (ret) { error_report("filter_mirror_send failed(%s)", strerror(-ret)); } @@ -164,7 +182,7 @@ static ssize_t filter_redirector_receive_iov(NetFilterState *nf, int ret; if (qemu_chr_fe_get_driver(&s->chr_out)) { - ret = filter_mirror_send(&s->chr_out, iov, iovcnt); + ret = filter_mirror_send(s, iov, iovcnt); if (ret) { error_report("filter_mirror_send failed(%s)", strerror(-ret)); } -- 2.7.4