From patchwork Wed Jun 20 07:32:17 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Peter Xu X-Patchwork-Id: 931994 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=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com 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 419c520ZrLz9s3Z for ; Wed, 20 Jun 2018 17:33:26 +1000 (AEST) Received: from localhost ([::1]:46463 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fVXcJ-0005Ku-Mw for incoming@patchwork.ozlabs.org; Wed, 20 Jun 2018 03:33:23 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51420) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fVXbk-0005JK-VR for qemu-devel@nongnu.org; Wed, 20 Jun 2018 03:32:49 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fVXbk-0002Hb-1E for qemu-devel@nongnu.org; Wed, 20 Jun 2018 03:32:48 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:44514 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fVXbj-0002H4-Rp for qemu-devel@nongnu.org; Wed, 20 Jun 2018 03:32:47 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 5D3F14022909; Wed, 20 Jun 2018 07:32:47 +0000 (UTC) Received: from xz-mi.nay.redhat.com (dhcp-14-142.nay.redhat.com [10.66.14.142]) by smtp.corp.redhat.com (Postfix) with ESMTP id 40A741117626; Wed, 20 Jun 2018 07:32:40 +0000 (UTC) From: Peter Xu To: qemu-devel@nongnu.org Date: Wed, 20 Jun 2018 15:32:17 +0800 Message-Id: <20180620073223.31964-2-peterx@redhat.com> In-Reply-To: <20180620073223.31964-1-peterx@redhat.com> References: <20180620073223.31964-1-peterx@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Wed, 20 Jun 2018 07:32:47 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.6]); Wed, 20 Jun 2018 07:32:47 +0000 (UTC) for IP:'10.11.54.3' DOMAIN:'int-mx03.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'peterx@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [PATCH v5 1/7] chardev: comment details for CLOSED event 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: Kevin Wolf , Peter Maydell , Thomas Huth , Fam Zheng , Eric Auger , John Snow , peterx@redhat.com, Max Reitz , Christian Borntraeger , "Dr . David Alan Gilbert" , Stefan Hajnoczi , Paolo Bonzini , =?utf-8?q?Marc-Andr=C3=A9_Lureau?= , Markus Armbruster Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" It was unclear before on what does the CLOSED event mean. Meanwhile we add a TODO to fix up the CLOSED event in the future when the in/out ports are different for a chardev. CC: Paolo Bonzini CC: "Marc-André Lureau" CC: Stefan Hajnoczi CC: Markus Armbruster Reviewed-by: Stefan Hajnoczi Signed-off-by: Peter Xu --- include/chardev/char.h | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/include/chardev/char.h b/include/chardev/char.h index 04de45795e..6f0576e214 100644 --- a/include/chardev/char.h +++ b/include/chardev/char.h @@ -22,7 +22,16 @@ typedef enum { CHR_EVENT_OPENED, /* new connection established */ CHR_EVENT_MUX_IN, /* mux-focus was set to this terminal */ CHR_EVENT_MUX_OUT, /* mux-focus will move on */ - CHR_EVENT_CLOSED /* connection closed */ + CHR_EVENT_CLOSED /* connection closed. NOTE: currently this event + * is only bound to the read port of the chardev. + * Normally the read port and write port of a + * chardev should be the same, but it can be + * different, e.g., for fd chardevs, when the two + * fds are different. So when we received the + * CLOSED event it's still possible that the out + * port is still open. TODO: we should only send + * the CLOSED event when both ports are closed. + */ } QEMUChrEvent; #define CHR_READ_BUF_LEN 4096