From patchwork Tue Oct 10 15:43:25 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= X-Patchwork-Id: 823906 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 3yBLyS4tQRz9tYK for ; Wed, 11 Oct 2017 02:44:32 +1100 (AEDT) Received: from localhost ([::1]:35683 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e1whq-0002hd-Kv for incoming@patchwork.ozlabs.org; Tue, 10 Oct 2017 11:44:30 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47617) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1e1whB-0002eu-1D for qemu-devel@nongnu.org; Tue, 10 Oct 2017 11:43:50 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1e1wh7-00034x-VW for qemu-devel@nongnu.org; Tue, 10 Oct 2017 11:43:49 -0400 Received: from mx1.redhat.com ([209.132.183.28]:43252) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1e1wh7-00033m-Mx for qemu-devel@nongnu.org; Tue, 10 Oct 2017 11:43:45 -0400 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id B4AAC81245 for ; Tue, 10 Oct 2017 15:43:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com B4AAC81245 Authentication-Results: ext-mx01.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx01.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=berrange@redhat.com Received: from t460.redhat.com (unknown [10.33.36.82]) by smtp.corp.redhat.com (Postfix) with ESMTP id 014F0679E8; Tue, 10 Oct 2017 15:43:43 +0000 (UTC) From: "Daniel P. Berrange" To: qemu-devel@nongnu.org Date: Tue, 10 Oct 2017 16:43:25 +0100 Message-Id: <20171010154328.8419-5-berrange@redhat.com> In-Reply-To: <20171010154328.8419-1-berrange@redhat.com> References: <20171010154328.8419-1-berrange@redhat.com> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.25]); Tue, 10 Oct 2017 15:43:44 +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] [PATCH v1 4/7] io: pass a struct iovec into qio_channel_websock_encode 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: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" Instead of requiring use of another Buffer, pass a struct iovec into qio_channel_websock_encode, which gives callers more flexibility in how they process data. Signed-off-by: Daniel P. Berrange --- io/channel-websock.c | 69 ++++++++++++++++++++++++++++++++-------------------- 1 file changed, 42 insertions(+), 27 deletions(-) diff --git a/io/channel-websock.c b/io/channel-websock.c index 17f50f5bb1..ad62dda479 100644 --- a/io/channel-websock.c +++ b/io/channel-websock.c @@ -582,11 +582,14 @@ static gboolean qio_channel_websock_handshake_io(QIOChannel *ioc, } -static void qio_channel_websock_encode_buffer(QIOChannelWebsock *ioc, - Buffer *output, - uint8_t opcode, Buffer *buffer) +static void qio_channel_websock_encode(QIOChannelWebsock *ioc, + uint8_t opcode, + const struct iovec *iov, + size_t niov, + size_t size) { size_t header_size; + size_t i; union { char buf[QIO_CHANNEL_WEBSOCK_HEADER_LEN_64_BIT]; QIOChannelWebsockHeader ws; @@ -594,25 +597,31 @@ static void qio_channel_websock_encode_buffer(QIOChannelWebsock *ioc, header.ws.b0 = QIO_CHANNEL_WEBSOCK_HEADER_FIELD_FIN | (opcode & QIO_CHANNEL_WEBSOCK_HEADER_FIELD_OPCODE); - if (buffer->offset < QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_THRESHOLD_7_BIT) { - header.ws.b1 = (uint8_t)buffer->offset; + if (size < QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_THRESHOLD_7_BIT) { + header.ws.b1 = (uint8_t)size; header_size = QIO_CHANNEL_WEBSOCK_HEADER_LEN_7_BIT; - } else if (buffer->offset < - QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_THRESHOLD_16_BIT) { + } else if (size < QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_THRESHOLD_16_BIT) { header.ws.b1 = QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_16_BIT; - header.ws.u.s16.l16 = cpu_to_be16((uint16_t)buffer->offset); + header.ws.u.s16.l16 = cpu_to_be16((uint16_t)size); header_size = QIO_CHANNEL_WEBSOCK_HEADER_LEN_16_BIT; } else { header.ws.b1 = QIO_CHANNEL_WEBSOCK_PAYLOAD_LEN_MAGIC_64_BIT; - header.ws.u.s64.l64 = cpu_to_be64(buffer->offset); + header.ws.u.s64.l64 = cpu_to_be64(size); header_size = QIO_CHANNEL_WEBSOCK_HEADER_LEN_64_BIT; } header_size -= QIO_CHANNEL_WEBSOCK_HEADER_LEN_MASK; - trace_qio_channel_websock_encode(ioc, opcode, header_size, buffer->offset); - buffer_reserve(output, header_size + buffer->offset); - buffer_append(output, header.buf, header_size); - buffer_append(output, buffer->buffer, buffer->offset); + trace_qio_channel_websock_encode(ioc, opcode, header_size, size); + buffer_reserve(&ioc->encoutput, header_size + size); + buffer_append(&ioc->encoutput, header.buf, header_size); + for (i = 0; i < niov && size != 0; i++) { + size_t want = iov->iov_len; + if (want > size) { + want = size; + } + buffer_append(&ioc->encoutput, iov->iov_base, want); + size -= want; + } } @@ -622,6 +631,7 @@ static ssize_t qio_channel_websock_write_wire(QIOChannelWebsock *, Error **); static void qio_channel_websock_write_close(QIOChannelWebsock *ioc, uint16_t code, const char *reason) { + struct iovec iov; buffer_reserve(&ioc->rawoutput, 2 + (reason ? strlen(reason) : 0)); *(uint16_t *)(ioc->rawoutput.buffer + ioc->rawoutput.offset) = cpu_to_be16(code); @@ -629,9 +639,10 @@ static void qio_channel_websock_write_close(QIOChannelWebsock *ioc, if (reason) { buffer_append(&ioc->rawoutput, reason, strlen(reason)); } - qio_channel_websock_encode_buffer( - ioc, &ioc->encoutput, QIO_CHANNEL_WEBSOCK_OPCODE_CLOSE, - &ioc->rawoutput); + iov.iov_base = ioc->rawoutput.buffer; + iov.iov_len = ioc->rawoutput.offset; + qio_channel_websock_encode(ioc, QIO_CHANNEL_WEBSOCK_OPCODE_CLOSE, + &iov, 1, iov.iov_len); buffer_reset(&ioc->rawoutput); qio_channel_websock_write_wire(ioc, NULL); qio_channel_shutdown(ioc->master, QIO_CHANNEL_SHUTDOWN_BOTH, NULL); @@ -801,9 +812,10 @@ static int qio_channel_websock_decode_payload(QIOChannelWebsock *ioc, error_setg(errp, "websocket closed by peer"); if (payload_len) { /* echo client status */ - qio_channel_websock_encode_buffer( - ioc, &ioc->encoutput, QIO_CHANNEL_WEBSOCK_OPCODE_CLOSE, - &ioc->encinput); + struct iovec iov = { .iov_base = ioc->encinput.buffer, + .iov_len = ioc->encinput.offset }; + qio_channel_websock_encode(ioc, QIO_CHANNEL_WEBSOCK_OPCODE_CLOSE, + &iov, 1, iov.iov_len); qio_channel_websock_write_wire(ioc, NULL); qio_channel_shutdown(ioc->master, QIO_CHANNEL_SHUTDOWN_BOTH, NULL); } else { @@ -816,9 +828,10 @@ static int qio_channel_websock_decode_payload(QIOChannelWebsock *ioc, /* ping frames produce an immediate reply, as long as we've not still * got a previous ping queued, in which case we drop the new pong */ if (ioc->ping_remain == 0) { - qio_channel_websock_encode_buffer( - ioc, &ioc->encoutput, QIO_CHANNEL_WEBSOCK_OPCODE_PONG, - &ioc->encinput); + struct iovec iov = { .iov_base = ioc->encinput.buffer, + .iov_len = ioc->encinput.offset }; + qio_channel_websock_encode(ioc, QIO_CHANNEL_WEBSOCK_OPCODE_PONG, + &iov, 1, iov.iov_len); ioc->ping_remain = ioc->encoutput.offset; } } /* pong frames are ignored */ @@ -1120,11 +1133,13 @@ static ssize_t qio_channel_websock_writev(QIOChannel *ioc, } done: - if (ioc->rawoutput.offset) { - qio_channel_websock_encode_buffer( - ioc, &ioc->encoutput, QIO_CHANNEL_WEBSOCK_OPCODE_BINARY_FRAME, - &ioc->rawoutput); - buffer_reset(&ioc->rawoutput); + if (wioc->rawoutput.offset) { + struct iovec iov = { .iov_base = wioc->rawoutput.buffer, + .iov_len = wioc->rawoutput.offset }; + qio_channel_websock_encode(wioc, + QIO_CHANNEL_WEBSOCK_OPCODE_BINARY_FRAME, + &iov, 1, iov.iov_len); + buffer_reset(&wioc->rawoutput); } ret = qio_channel_websock_write_wire(wioc, errp); if (ret < 0 &&