From: "Marc-André Lureau" <marcandre.lureau@gmail.com>
To: "Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>
Cc: mszeredi@redhat.com, "Michael S. Tsirkin" <mst@redhat.com>,
Cornelia Huck <cohuck@redhat.com>, QEMU <qemu-devel@nongnu.org>,
Stefan Hajnoczi <stefanha@redhat.com>,
vgoyal@redhat.com
Subject: Re: [PATCH v4 2/3] virtio: add vhost-user-fs base device
Date: Mon, 30 Sep 2019 15:06:02 +0400 [thread overview]
Message-ID: <CAJ+F1CJ0KoFay_yddvQRZ73VNECyjzdWL8rBj9pCdWncFZhMbA@mail.gmail.com> (raw)
In-Reply-To: <20190930105135.27244-3-dgilbert@redhat.com>
Hi
On Mon, Sep 30, 2019 at 2:52 PM Dr. David Alan Gilbert (git)
<dgilbert@redhat.com> wrote:
>
> From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
>
> The virtio-fs virtio device provides shared file system access using
> the FUSE protocol carried over virtio.
> The actual file server is implemented in an external vhost-user-fs device
> backend process.
>
> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
> Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> ---
> configure | 13 ++
> hw/virtio/Makefile.objs | 1 +
> hw/virtio/vhost-user-fs.c | 299 ++++++++++++++++++++++++++++++
> include/hw/virtio/vhost-user-fs.h | 45 +++++
> 4 files changed, 358 insertions(+)
> create mode 100644 hw/virtio/vhost-user-fs.c
> create mode 100644 include/hw/virtio/vhost-user-fs.h
>
> diff --git a/configure b/configure
> index 542f6aea3f..204cbe351e 100755
> --- a/configure
> +++ b/configure
> @@ -381,6 +381,7 @@ vhost_crypto=""
> vhost_scsi=""
> vhost_vsock=""
> vhost_user=""
> +vhost_user_fs=""
> kvm="no"
> hax="no"
> hvf="no"
> @@ -1293,6 +1294,10 @@ for opt do
> ;;
> --enable-vhost-vsock) vhost_vsock="yes"
> ;;
> + --disable-vhost-user-fs) vhost_user_fs="no"
> + ;;
> + --enable-vhost-user-fs) vhost_user_fs="yes"
> + ;;
> --disable-opengl) opengl="no"
> ;;
> --enable-opengl) opengl="yes"
> @@ -2236,6 +2241,10 @@ test "$vhost_crypto" = "" && vhost_crypto=$vhost_user
> if test "$vhost_crypto" = "yes" && test "$vhost_user" = "no"; then
> error_exit "--enable-vhost-crypto requires --enable-vhost-user"
> fi
> +test "$vhost_user_fs" = "" && vhost_user_fs=$vhost_user
> +if test "$vhost_user_fs" = "yes" && test "$vhost_user" = "no"; then
> + error_exit "--enable-vhost-user-fs requires --enable-vhost-user"
> +fi
>
> # OR the vhost-kernel and vhost-user values for simplicity
> if test "$vhost_net" = ""; then
> @@ -6377,6 +6386,7 @@ echo "vhost-crypto support $vhost_crypto"
> echo "vhost-scsi support $vhost_scsi"
> echo "vhost-vsock support $vhost_vsock"
> echo "vhost-user support $vhost_user"
> +echo "vhost-user-fs support $vhost_user_fs"
> echo "Trace backends $trace_backends"
> if have_backend "simple"; then
> echo "Trace output file $trace_file-<pid>"
> @@ -6873,6 +6883,9 @@ fi
> if test "$vhost_user" = "yes" ; then
> echo "CONFIG_VHOST_USER=y" >> $config_host_mak
> fi
> +if test "$vhost_user_fs" = "yes" ; then
> + echo "CONFIG_VHOST_USER_FS=y" >> $config_host_mak
> +fi
> if test "$blobs" = "yes" ; then
> echo "INSTALL_BLOBS=yes" >> $config_host_mak
> fi
> diff --git a/hw/virtio/Makefile.objs b/hw/virtio/Makefile.objs
> index 964ce78607..47ffbf22c4 100644
> --- a/hw/virtio/Makefile.objs
> +++ b/hw/virtio/Makefile.objs
> @@ -11,6 +11,7 @@ common-obj-$(CONFIG_VIRTIO_PCI) += virtio-pci.o
> common-obj-$(CONFIG_VIRTIO_MMIO) += virtio-mmio.o
> obj-$(CONFIG_VIRTIO_BALLOON) += virtio-balloon.o
> obj-$(CONFIG_VIRTIO_CRYPTO) += virtio-crypto.o
> +obj-$(CONFIG_VHOST_USER_FS) += vhost-user-fs.o
> obj-$(call land,$(CONFIG_VIRTIO_CRYPTO),$(CONFIG_VIRTIO_PCI)) += virtio-crypto-pci.o
> obj-$(CONFIG_VIRTIO_PMEM) += virtio-pmem.o
> common-obj-$(call land,$(CONFIG_VIRTIO_PMEM),$(CONFIG_VIRTIO_PCI)) += virtio-pmem-pci.o
> diff --git a/hw/virtio/vhost-user-fs.c b/hw/virtio/vhost-user-fs.c
> new file mode 100644
> index 0000000000..f0df7f4746
> --- /dev/null
> +++ b/hw/virtio/vhost-user-fs.c
> @@ -0,0 +1,299 @@
> +/*
> + * Vhost-user filesystem virtio device
> + *
> + * Copyright 2018-2019 Red Hat, Inc.
> + *
> + * Authors:
> + * Stefan Hajnoczi <stefanha@redhat.com>
> + *
> + * This work is licensed under the terms of the GNU GPL, version 2 or
> + * (at your option) any later version. See the COPYING file in the
> + * top-level directory.
> + */
> +
> +#include "qemu/osdep.h"
> +#include <sys/ioctl.h>
> +#include "standard-headers/linux/virtio_fs.h"
> +#include "qapi/error.h"
> +#include "hw/qdev-properties.h"
> +#include "hw/virtio/virtio-bus.h"
> +#include "hw/virtio/virtio-access.h"
> +#include "qemu/error-report.h"
> +#include "hw/virtio/vhost-user-fs.h"
> +#include "monitor/monitor.h"
> +
> +static void vuf_get_config(VirtIODevice *vdev, uint8_t *config)
> +{
> + VHostUserFS *fs = VHOST_USER_FS(vdev);
> + struct virtio_fs_config fscfg = {};
> +
> + memcpy((char *)fscfg.tag, fs->conf.tag,
> + MIN(strlen(fs->conf.tag) + 1, sizeof(fscfg.tag)));
> +
> + virtio_stl_p(vdev, &fscfg.num_request_queues, fs->conf.num_request_queues);
> +
> + memcpy(config, &fscfg, sizeof(fscfg));
> +}
> +
> +static void vuf_start(VirtIODevice *vdev)
> +{
> + VHostUserFS *fs = VHOST_USER_FS(vdev);
> + BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
> + VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
> + int ret;
> + int i;
> +
> + if (!k->set_guest_notifiers) {
> + error_report("binding does not support guest notifiers");
> + return;
> + }
> +
> + ret = vhost_dev_enable_notifiers(&fs->vhost_dev, vdev);
> + if (ret < 0) {
> + error_report("Error enabling host notifiers: %d", -ret);
> + return;
> + }
> +
> + ret = k->set_guest_notifiers(qbus->parent, fs->vhost_dev.nvqs, true);
> + if (ret < 0) {
> + error_report("Error binding guest notifier: %d", -ret);
> + goto err_host_notifiers;
> + }
> +
> + fs->vhost_dev.acked_features = vdev->guest_features;
> + ret = vhost_dev_start(&fs->vhost_dev, vdev);
> + if (ret < 0) {
> + error_report("Error starting vhost: %d", -ret);
> + goto err_guest_notifiers;
> + }
> +
> + /*
> + * guest_notifier_mask/pending not used yet, so just unmask
> + * everything here. virtio-pci will do the right thing by
> + * enabling/disabling irqfd.
> + */
> + for (i = 0; i < fs->vhost_dev.nvqs; i++) {
> + vhost_virtqueue_mask(&fs->vhost_dev, vdev, i, false);
> + }
> +
> + return;
> +
> +err_guest_notifiers:
> + k->set_guest_notifiers(qbus->parent, fs->vhost_dev.nvqs, false);
> +err_host_notifiers:
> + vhost_dev_disable_notifiers(&fs->vhost_dev, vdev);
> +}
> +
> +static void vuf_stop(VirtIODevice *vdev)
> +{
> + VHostUserFS *fs = VHOST_USER_FS(vdev);
> + BusState *qbus = BUS(qdev_get_parent_bus(DEVICE(vdev)));
> + VirtioBusClass *k = VIRTIO_BUS_GET_CLASS(qbus);
> + int ret;
> +
> + if (!k->set_guest_notifiers) {
> + return;
> + }
> +
> + vhost_dev_stop(&fs->vhost_dev, vdev);
> +
> + ret = k->set_guest_notifiers(qbus->parent, fs->vhost_dev.nvqs, false);
> + if (ret < 0) {
> + error_report("vhost guest notifier cleanup failed: %d", ret);
> + return;
> + }
> +
> + vhost_dev_disable_notifiers(&fs->vhost_dev, vdev);
> +}
> +
> +static void vuf_set_status(VirtIODevice *vdev, uint8_t status)
> +{
> + VHostUserFS *fs = VHOST_USER_FS(vdev);
> + bool should_start = status & VIRTIO_CONFIG_S_DRIVER_OK;
> +
> + if (!vdev->vm_running) {
> + should_start = false;
> + }
> +
> + if (fs->vhost_dev.started == should_start) {
> + return;
> + }
> +
> + if (should_start) {
> + vuf_start(vdev);
> + } else {
> + vuf_stop(vdev);
> + }
> +}
It looks like you could have benefited from backends/vhost-user.c
This would allow to factor out some common code and properties used by
vhost-user devices (currently gpu & input, but more could be
converted).
Advantage is that if we add a new mechanism, say to start helpers
(like I propose earlier), all devices using that could benefit it more
easily (in theory).
> +
> +static uint64_t vuf_get_features(VirtIODevice *vdev,
> + uint64_t requested_features,
> + Error **errp)
> +{
> + /* No feature bits used yet */
> + return requested_features;
> +}
> +
> +static void vuf_handle_output(VirtIODevice *vdev, VirtQueue *vq)
> +{
> + /*
> + * Not normally called; it's the daemon that handles the queue;
> + * however virtio's cleanup path can call this.
> + */
> +}
> +
> +static void vuf_guest_notifier_mask(VirtIODevice *vdev, int idx,
> + bool mask)
> +{
> + VHostUserFS *fs = VHOST_USER_FS(vdev);
> +
> + vhost_virtqueue_mask(&fs->vhost_dev, vdev, idx, mask);
> +}
> +
> +static bool vuf_guest_notifier_pending(VirtIODevice *vdev, int idx)
> +{
> + VHostUserFS *fs = VHOST_USER_FS(vdev);
> +
> + return vhost_virtqueue_pending(&fs->vhost_dev, idx);
> +}
> +
> +static void vuf_device_realize(DeviceState *dev, Error **errp)
> +{
> + VirtIODevice *vdev = VIRTIO_DEVICE(dev);
> + VHostUserFS *fs = VHOST_USER_FS(dev);
> + unsigned int i;
> + size_t len;
> + int ret;
> +
> + if (!fs->conf.chardev.chr) {
> + error_setg(errp, "missing chardev");
> + return;
> + }
> +
> + if (!fs->conf.tag) {
> + error_setg(errp, "missing tag property");
> + return;
> + }
> + len = strlen(fs->conf.tag);
> + if (len == 0) {
> + error_setg(errp, "tag property cannot be empty");
> + return;
> + }
> + if (len > sizeof_field(struct virtio_fs_config, tag)) {
> + error_setg(errp, "tag property must be %zu bytes or less",
> + sizeof_field(struct virtio_fs_config, tag));
> + return;
> + }
> +
> + if (fs->conf.num_request_queues == 0) {
> + error_setg(errp, "num-request-queues property must be larger than 0");
> + return;
> + }
> +
> + if (!is_power_of_2(fs->conf.queue_size)) {
> + error_setg(errp, "queue-size property must be a power of 2");
> + return;
> + }
> +
> + if (fs->conf.queue_size > VIRTQUEUE_MAX_SIZE) {
> + error_setg(errp, "queue-size property must be %u or smaller",
> + VIRTQUEUE_MAX_SIZE);
> + return;
> + }
> +
> + if (!vhost_user_init(&fs->vhost_user, &fs->conf.chardev, errp)) {
> + return;
> + }
> +
> + virtio_init(vdev, "vhost-user-fs", VIRTIO_ID_FS,
> + sizeof(struct virtio_fs_config));
> +
> + /* Hiprio queue */
> + virtio_add_queue(vdev, fs->conf.queue_size, vuf_handle_output);
> +
> + /* Request queues */
> + for (i = 0; i < fs->conf.num_request_queues; i++) {
> + virtio_add_queue(vdev, fs->conf.queue_size, vuf_handle_output);
> + }
> +
> + /* 1 high prio queue, plus the number configured */
> + fs->vhost_dev.nvqs = 1 + fs->conf.num_request_queues;
> + fs->vhost_dev.vqs = g_new0(struct vhost_virtqueue, fs->vhost_dev.nvqs);
> + ret = vhost_dev_init(&fs->vhost_dev, &fs->vhost_user,
> + VHOST_BACKEND_TYPE_USER, 0);
> + if (ret < 0) {
> + error_setg_errno(errp, -ret, "vhost_dev_init failed");
> + goto err_virtio;
> + }
> +
> + return;
> +
> +err_virtio:
> + vhost_user_cleanup(&fs->vhost_user);
> + virtio_cleanup(vdev);
> + g_free(fs->vhost_dev.vqs);
> + return;
> +}
> +
> +static void vuf_device_unrealize(DeviceState *dev, Error **errp)
> +{
> + VirtIODevice *vdev = VIRTIO_DEVICE(dev);
> + VHostUserFS *fs = VHOST_USER_FS(dev);
> +
> + /* This will stop vhost backend if appropriate. */
> + vuf_set_status(vdev, 0);
> +
> + vhost_dev_cleanup(&fs->vhost_dev);
> +
> + vhost_user_cleanup(&fs->vhost_user);
> +
> + virtio_cleanup(vdev);
> + g_free(fs->vhost_dev.vqs);
> + fs->vhost_dev.vqs = NULL;
> +}
> +
> +static const VMStateDescription vuf_vmstate = {
> + .name = "vhost-user-fs",
> + .unmigratable = 1,
> +};
> +
> +static Property vuf_properties[] = {
> + DEFINE_PROP_CHR("chardev", VHostUserFS, conf.chardev),
> + DEFINE_PROP_STRING("tag", VHostUserFS, conf.tag),
> + DEFINE_PROP_UINT16("num-request-queues", VHostUserFS,
> + conf.num_request_queues, 1),
> + DEFINE_PROP_UINT16("queue-size", VHostUserFS, conf.queue_size, 128),
> + DEFINE_PROP_STRING("vhostfd", VHostUserFS, conf.vhostfd),
> + DEFINE_PROP_END_OF_LIST(),
> +};
> +
> +static void vuf_class_init(ObjectClass *klass, void *data)
> +{
> + DeviceClass *dc = DEVICE_CLASS(klass);
> + VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
> +
> + dc->props = vuf_properties;
> + dc->vmsd = &vuf_vmstate;
> + set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
> + vdc->realize = vuf_device_realize;
> + vdc->unrealize = vuf_device_unrealize;
> + vdc->get_features = vuf_get_features;
> + vdc->get_config = vuf_get_config;
> + vdc->set_status = vuf_set_status;
> + vdc->guest_notifier_mask = vuf_guest_notifier_mask;
> + vdc->guest_notifier_pending = vuf_guest_notifier_pending;
> +}
> +
> +static const TypeInfo vuf_info = {
> + .name = TYPE_VHOST_USER_FS,
> + .parent = TYPE_VIRTIO_DEVICE,
> + .instance_size = sizeof(VHostUserFS),
> + .class_init = vuf_class_init,
> +};
> +
> +static void vuf_register_types(void)
> +{
> + type_register_static(&vuf_info);
> +}
> +
> +type_init(vuf_register_types)
> diff --git a/include/hw/virtio/vhost-user-fs.h b/include/hw/virtio/vhost-user-fs.h
> new file mode 100644
> index 0000000000..539885b458
> --- /dev/null
> +++ b/include/hw/virtio/vhost-user-fs.h
> @@ -0,0 +1,45 @@
> +/*
> + * Vhost-user filesystem virtio device
> + *
> + * Copyright 2018-2019 Red Hat, Inc.
> + *
> + * Authors:
> + * Stefan Hajnoczi <stefanha@redhat.com>
> + *
> + * This work is licensed under the terms of the GNU GPL, version 2 or
> + * (at your option) any later version. See the COPYING file in the
> + * top-level directory.
> + */
> +
> +#ifndef _QEMU_VHOST_USER_FS_H
> +#define _QEMU_VHOST_USER_FS_H
> +
> +#include "hw/virtio/virtio.h"
> +#include "hw/virtio/vhost.h"
> +#include "hw/virtio/vhost-user.h"
> +#include "chardev/char-fe.h"
> +
> +#define TYPE_VHOST_USER_FS "vhost-user-fs-device"
> +#define VHOST_USER_FS(obj) \
> + OBJECT_CHECK(VHostUserFS, (obj), TYPE_VHOST_USER_FS)
> +
> +typedef struct {
> + CharBackend chardev;
> + char *tag;
> + uint16_t num_request_queues;
> + uint16_t queue_size;
> + char *vhostfd;
> +} VHostUserFSConf;
> +
> +typedef struct {
> + /*< private >*/
> + VirtIODevice parent;
> + VHostUserFSConf conf;
> + struct vhost_virtqueue *vhost_vqs;
> + struct vhost_dev vhost_dev;
> + VhostUserState vhost_user;
> +
> + /*< public >*/
> +} VHostUserFS;
> +
> +#endif /* _QEMU_VHOST_USER_FS_H */
> --
> 2.21.0
>
>
--
Marc-André Lureau
next prev parent reply other threads:[~2019-09-30 11:07 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-30 10:51 [PATCH v4 0/3] Add virtio-fs Dr. David Alan Gilbert (git)
2019-09-30 10:51 ` [PATCH v4 1/3] virtio: Add virtio_fs linux headers Dr. David Alan Gilbert (git)
2019-10-05 22:00 ` [PULL 17/19] " Michael S. Tsirkin
2019-09-30 10:51 ` [PATCH v4 2/3] virtio: add vhost-user-fs base device Dr. David Alan Gilbert (git)
2019-09-30 11:06 ` Marc-André Lureau [this message]
2019-10-01 17:29 ` Dr. David Alan Gilbert
2019-10-02 15:07 ` Marc-André Lureau
2019-10-05 22:00 ` [PULL 18/19] " Michael S. Tsirkin
2019-10-07 5:57 ` Igor Mammedov
2019-10-07 7:28 ` Michael S. Tsirkin
2019-09-30 10:51 ` [PATCH v4 3/3] virtio: add vhost-user-fs-pci device Dr. David Alan Gilbert (git)
2019-10-05 22:00 ` [PULL 19/19] " Michael S. Tsirkin
-- strict thread matches above, loose matches on Subject: below --
2019-10-05 21:58 [PULL 00/19] virtio, vhost, acpi: features, fixes, tests Michael S. Tsirkin
2019-09-24 16:20 ` [PATCH v3] vhost-user: save features if the char dev is closed Adrian Moreno
2019-09-25 4:14 ` Jason Wang
2019-10-05 21:58 ` [PULL 01/19] " Michael S. Tsirkin
2019-10-05 21:59 ` [PULL 12/19] tests/acpi: add empty files Michael S. Tsirkin
2019-10-05 21:59 ` [PULL 13/19] tests: allow empty expected files Michael S. Tsirkin
2019-10-05 21:59 ` [PULL 15/19] tests: document how to update acpi tables Michael S. Tsirkin
2019-10-05 21:59 ` [PULL 16/19] tests/acpi: add expected tables for arm/virt Michael S. Tsirkin
2019-10-07 16:31 ` [PULL 00/19] virtio, vhost, acpi: features, fixes, tests Peter Maydell
2019-10-15 21:03 ` Michael S. Tsirkin
2019-10-17 15:48 ` Peter Maydell
2019-09-18 13:06 [Qemu-devel] [PATCH-for-4.2 v11 00/11] ARM virt: ACPI memory hotplug support Shameer Kolothum
2019-09-18 13:06 ` [Qemu-devel] [PATCH-for-4.2 v11 01/11] hw/acpi: Make ACPI IO address space configurable Shameer Kolothum
2019-10-05 21:58 ` [PULL 02/19] " Michael S. Tsirkin
2019-09-18 13:06 ` [Qemu-devel] [PATCH-for-4.2 v11 02/11] hw/acpi: Do not create memory hotplug method when handler is not defined Shameer Kolothum
2019-10-05 21:58 ` [PULL 03/19] " Michael S. Tsirkin
2019-09-18 13:06 ` [Qemu-devel] [PATCH-for-4.2 v11 03/11] hw/acpi: Add ACPI Generic Event Device Support Shameer Kolothum
2019-09-25 15:03 ` Igor Mammedov
2019-10-05 21:58 ` [PULL 04/19] " Michael S. Tsirkin
2019-09-18 13:06 ` [Qemu-devel] [PATCH-for-4.2 v11 04/11] hw/arm/virt: Add memory hotplug framework Shameer Kolothum
2019-10-05 21:58 ` [PULL 05/19] " Michael S. Tsirkin
2019-09-18 13:06 ` [Qemu-devel] [PATCH-for-4.2 v11 05/11] hw/arm/virt: Enable device memory cold/hot plug with ACPI boot Shameer Kolothum
2019-09-25 15:06 ` Igor Mammedov
2019-10-05 21:59 ` [PULL 06/19] " Michael S. Tsirkin
2019-09-18 13:06 ` [Qemu-devel] [PATCH-for-4.2 v11 06/11] hw/arm/virt-acpi-build: Add PC-DIMM in SRAT Shameer Kolothum
2019-10-05 21:59 ` [PULL 07/19] " Michael S. Tsirkin
2019-09-18 13:06 ` [Qemu-devel] [PATCH-for-4.2 v11 07/11] hw/arm: Factor out powerdown notifier from GPIO Shameer Kolothum
2019-10-05 21:59 ` [PULL 08/19] " Michael S. Tsirkin
2019-09-18 13:06 ` [Qemu-devel] [PATCH-for-4.2 v11 08/11] hw/arm: Use GED for system_powerdown event Shameer Kolothum
2019-10-05 21:59 ` [PULL 09/19] " Michael S. Tsirkin
2019-09-18 13:06 ` [Qemu-devel] [PATCH-for-4.2 v11 09/11] docs/specs: Add ACPI GED documentation Shameer Kolothum
2019-09-25 15:09 ` Igor Mammedov
2019-10-05 21:59 ` [PULL 10/19] " Michael S. Tsirkin
2019-09-18 13:06 ` [Qemu-devel] [PATCH-for-4.2 v11 10/11] tests: Update ACPI tables list for upcoming arm/virt tests Shameer Kolothum
2019-09-25 15:11 ` Igor Mammedov
2019-10-05 21:59 ` [PULL 11/19] " Michael S. Tsirkin
2019-09-18 13:06 ` [Qemu-devel] [PATCH-for-4.2 v11 11/11] tests: Add bios tests to arm/virt Shameer Kolothum
2019-09-25 15:26 ` Michael S. Tsirkin
2019-09-25 17:36 ` Igor Mammedov
2019-10-05 21:59 ` [PULL 14/19] " Michael S. Tsirkin
2019-09-19 4:53 ` [Qemu-devel] [PATCH-for-4.2 v11 00/11] ARM virt: ACPI memory hotplug support no-reply
2019-09-19 20:36 ` no-reply
2019-09-20 15:49 ` no-reply
2019-09-25 15:28 ` Michael S. Tsirkin
2019-09-25 15:37 ` Igor Mammedov
2019-09-25 16:20 ` Michael S. Tsirkin
2019-09-27 10:37 ` Peter Maydell
2019-09-25 15:30 ` Michael S. Tsirkin
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