From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=42886 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1PjvfT-0002Y3-8V for qemu-devel@nongnu.org; Mon, 31 Jan 2011 10:27:53 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1PjvfO-0003PD-EF for qemu-devel@nongnu.org; Mon, 31 Jan 2011 10:27:48 -0500 Received: from mx1.redhat.com ([209.132.183.28]:39766) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1PjvfO-0003Ox-5o for qemu-devel@nongnu.org; Mon, 31 Jan 2011 10:27:46 -0500 From: Kevin Wolf Date: Mon, 31 Jan 2011 16:28:55 +0100 Message-Id: <1296487756-12553-8-git-send-email-kwolf@redhat.com> In-Reply-To: <1296487756-12553-1-git-send-email-kwolf@redhat.com> References: <1296487756-12553-1-git-send-email-kwolf@redhat.com> Subject: [Qemu-devel] [PATCH 07/28] virtio-blk: tell the guest about size changes List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: anthony@codemonkey.ws Cc: kwolf@redhat.com, qemu-devel@nongnu.org From: Christoph Hellwig Raise a config change interrupt when the size changed. This allows virtio-blk guest drivers to read-read the information from the config space once it got the config chaged interrupt. Signed-off-by: Christoph Hellwig Signed-off-by: Kevin Wolf --- hw/virtio-blk.c | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c index 9f2a9c0..ffac5a4 100644 --- a/hw/virtio-blk.c +++ b/hw/virtio-blk.c @@ -514,6 +514,15 @@ static int virtio_blk_load(QEMUFile *f, void *opaque, int version_id) return 0; } +static void virtio_blk_change_cb(void *opaque, int reason) +{ + VirtIOBlock *s = opaque; + + if (reason & CHANGE_SIZE) { + virtio_notify_config(&s->vdev); + } +} + VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf) { VirtIOBlock *s; @@ -556,6 +565,7 @@ VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf) register_savevm(dev, "virtio-blk", virtio_blk_id++, 2, virtio_blk_save, virtio_blk_load, s); bdrv_set_removable(s->bs, 0); + bdrv_set_change_cb(s->bs, virtio_blk_change_cb, s); s->bs->buffer_alignment = conf->logical_block_size; add_boot_device_path(conf->bootindex, dev, "/disk@0,0"); -- 1.7.2.3