From nobody Sun Feb 8 20:28:25 2026 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; envelope-from=libvir-list-bounces@redhat.com; helo=mx1.redhat.com; Authentication-Results: mx.zoho.com; spf=pass (zoho.com: domain of redhat.com designates 209.132.183.28 as permitted sender) smtp.mailfrom=libvir-list-bounces@redhat.com; Return-Path: Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by mx.zohomail.com with SMTPS id 1492090339234766.1663542868354; Thu, 13 Apr 2017 06:32:19 -0700 (PDT) Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 76F03C05AA67; Thu, 13 Apr 2017 13:32:17 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.20]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 4745C7A435; Thu, 13 Apr 2017 13:32:17 +0000 (UTC) Received: from lists01.pubmisc.prod.ext.phx2.redhat.com (lists01.pubmisc.prod.ext.phx2.redhat.com [10.5.19.33]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id EE2FE18523DF; Thu, 13 Apr 2017 13:32:14 +0000 (UTC) Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) by lists01.pubmisc.prod.ext.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id v3DDW2PV012069 for ; Thu, 13 Apr 2017 09:32:02 -0400 Received: by smtp.corp.redhat.com (Postfix) id 001CC7A42E; Thu, 13 Apr 2017 13:32:02 +0000 (UTC) Received: from moe.brq.redhat.com (dhcp129-131.brq.redhat.com [10.34.129.131]) by smtp.corp.redhat.com (Postfix) with ESMTP id 7E4E67A41E for ; Thu, 13 Apr 2017 13:32:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 76F03C05AA67 Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx08.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=libvir-list-bounces@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 76F03C05AA67 From: Michal Privoznik To: libvir-list@redhat.com Date: Thu, 13 Apr 2017 15:31:20 +0200 Message-Id: In-Reply-To: References: In-Reply-To: References: X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-loop: libvir-list@redhat.com Subject: [libvirt] [PATCH 12/38] Introduce virStreamHoleSize X-BeenThere: libvir-list@redhat.com X-Mailman-Version: 2.1.12 Precedence: junk List-Id: Development discussions about the libvirt library & tools List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Sender: libvir-list-bounces@redhat.com Errors-To: libvir-list-bounces@redhat.com X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.32]); Thu, 13 Apr 2017 13:32:18 +0000 (UTC) X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Type: text/plain; charset="utf-8" This function is basically a counterpart for virStreamSkip. If one side of a stream called virStreamSkip() the other should call virStreamHoleSize() to get the size of the hole. Signed-off-by: Michal Privoznik --- include/libvirt/libvirt-stream.h | 3 +++ src/driver-stream.h | 5 +++++ src/libvirt-stream.c | 42 ++++++++++++++++++++++++++++++++++++= ++++ src/libvirt_public.syms | 1 + 4 files changed, 51 insertions(+) diff --git a/include/libvirt/libvirt-stream.h b/include/libvirt/libvirt-str= eam.h index 4e0a599..2ebda74 100644 --- a/include/libvirt/libvirt-stream.h +++ b/include/libvirt/libvirt-stream.h @@ -53,6 +53,9 @@ int virStreamRecvFlags(virStreamPtr st, int virStreamSkip(virStreamPtr st, unsigned long long length); =20 +int virStreamHoleSize(virStreamPtr, + unsigned long long *length); + =20 /** * virStreamSourceFunc: diff --git a/src/driver-stream.h b/src/driver-stream.h index 20ea13f..e196b6d 100644 --- a/src/driver-stream.h +++ b/src/driver-stream.h @@ -46,6 +46,10 @@ typedef int unsigned long long length); =20 typedef int +(*virDrvStreamHoleSize)(virStreamPtr st, + unsigned long long *length); + +typedef int (*virDrvStreamEventAddCallback)(virStreamPtr stream, int events, virStreamEventCallback cb, @@ -73,6 +77,7 @@ struct _virStreamDriver { virDrvStreamRecv streamRecv; virDrvStreamRecvFlags streamRecvFlags; virDrvStreamSkip streamSkip; + virDrvStreamHoleSize streamHoleSize; virDrvStreamEventAddCallback streamEventAddCallback; virDrvStreamEventUpdateCallback streamEventUpdateCallback; virDrvStreamEventRemoveCallback streamEventRemoveCallback; diff --git a/src/libvirt-stream.c b/src/libvirt-stream.c index 55f3ef5..3ac9e0d 100644 --- a/src/libvirt-stream.c +++ b/src/libvirt-stream.c @@ -403,6 +403,48 @@ virStreamSkip(virStreamPtr stream, =20 =20 /** + * virStreamHoleSize: + * @stream: pointer to the stream object + * @length: number of bytes to skip + * + * This function is a counterpart to virStreamSkip(). That is, if + * one side of a stream has called virStreamSkip() the other side + * of the stream should call virStreamHoleSize() to retrieve the + * size of hole. If there's currently no hole in the stream, -1 + * is returned. + * + * Returns 0 on success, + * -1 on error + */ +int +virStreamHoleSize(virStreamPtr stream, + unsigned long long *length) +{ + VIR_DEBUG("stream=3D%p, length=3D%p", stream, length); + + virResetLastError(); + + virCheckStreamReturn(stream, -1); + virCheckNonNullArgReturn(length, -1); + + if (stream->driver && + stream->driver->streamHoleSize) { + int ret; + ret =3D (stream->driver->streamHoleSize)(stream, length); + if (ret < 0) + goto error; + return ret; + } + + virReportUnsupportedError(); + + error: + virDispatchError(stream->conn); + return -1; +} + + +/** * virStreamSendAll: * @stream: pointer to the stream object * @handler: source callback for reading data from application diff --git a/src/libvirt_public.syms b/src/libvirt_public.syms index acadda8..0e34eee 100644 --- a/src/libvirt_public.syms +++ b/src/libvirt_public.syms @@ -761,6 +761,7 @@ LIBVIRT_3.1.0 { =20 LIBVIRT_3.3.0 { global: + virStreamHoleSize; virStreamRecvFlags; virStreamSkip; } LIBVIRT_3.1.0; --=20 2.10.2 -- libvir-list mailing list libvir-list@redhat.com https://www.redhat.com/mailman/listinfo/libvir-list