mirror of
https://github.com/qemu/qemu.git
synced 2024-12-10 20:23:35 +08:00
4f67d30b5e
The following patch will need to handle properties registration during class_init time. Let's use a device_class_set_props() setter. spatch --macro-file scripts/cocci-macro-file.h --sp-file ./scripts/coccinelle/qdev-set-props.cocci --keep-comments --in-place --dir . @@ typedef DeviceClass; DeviceClass *d; expression val; @@ - d->props = val + device_class_set_props(d, val) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20200110153039.1379601-20-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
299 lines
8.0 KiB
C
299 lines
8.0 KiB
C
/*
|
|
* 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);
|
|
}
|
|
}
|
|
|
|
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_END_OF_LIST(),
|
|
};
|
|
|
|
static void vuf_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
|
|
|
|
device_class_set_props(dc, 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)
|