From: Christoph Hellwig <hch@lst.de>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [PATCH 3/3] virtio-blk: tell the guest about size changes
Date: Fri, 14 Jan 2011 17:21:13 +0100 [thread overview]
Message-ID: <20110114162113.GC19184@lst.de> (raw)
In-Reply-To: <20110114162044.GA19114@lst.de>
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 <hch@lst.de>
Index: qemu/hw/virtio-blk.c
===================================================================
--- qemu.orig/hw/virtio-blk.c 2011-01-14 17:00:07.468262896 +0100
+++ qemu/hw/virtio-blk.c 2011-01-14 17:07:06.897257239 +0100
@@ -504,6 +504,16 @@ static int virtio_blk_load(QEMUFile *f,
return 0;
}
+static void virtio_blk_change_cb(void *opaque)
+{
+ VirtIOBlock *s = opaque;
+
+ if (s->bs->size_changed) {
+ virtio_notify_config(&s->vdev);
+ s->bs->size_changed = 0;
+ }
+}
+
VirtIODevice *virtio_blk_init(DeviceState *dev, BlockConf *conf)
{
VirtIOBlock *s;
@@ -546,6 +556,7 @@ VirtIODevice *virtio_blk_init(DeviceStat
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");
next prev parent reply other threads:[~2011-01-14 16:21 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-14 16:20 [Qemu-devel] [PATCH 0/3] allow online resizing of block devices Christoph Hellwig
2011-01-14 16:20 ` [Qemu-devel] [PATCH 1/3] block: add resize monitor command Christoph Hellwig
2011-01-17 11:28 ` Stefan Hajnoczi
2011-01-17 15:59 ` Christoph Hellwig
2011-01-17 17:36 ` Kevin Wolf
2011-01-18 12:28 ` Christoph Hellwig
2011-01-19 15:35 ` Christoph Hellwig
2011-01-19 15:49 ` Kevin Wolf
2011-01-19 15:52 ` Christoph Hellwig
2011-01-19 16:01 ` Kevin Wolf
2011-01-19 16:31 ` Christoph Hellwig
2011-01-14 16:21 ` [Qemu-devel] [PATCH 2/3] block: tell drivers about an image resize Christoph Hellwig
2011-01-14 21:06 ` Ryan Harper
2011-01-17 9:14 ` Christoph Hellwig
2011-01-14 16:21 ` Christoph Hellwig [this message]
2011-01-18 12:35 ` [Qemu-devel] [PATCH 0/3] allow online resizing of block devices Luiz Capitulino
2011-01-18 12:48 ` Christoph Hellwig
2011-01-18 13:17 ` Luiz Capitulino
2011-01-19 17:02 [Qemu-devel] [PATCH 0/3 v2] " Christoph Hellwig
2011-01-19 17:03 ` [Qemu-devel] [PATCH 3/3] virtio-blk: tell the guest about size changes Christoph Hellwig
2011-01-24 12:32 [Qemu-devel] [PATCH 0/3 v3] allow online resizing of block devices Christoph Hellwig
2011-01-24 12:32 ` [Qemu-devel] [PATCH 3/3] virtio-blk: tell the guest about size changes Christoph Hellwig
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