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9pfs: introduce V9fsVirtioState

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V9fsState now only contains generic fields. Introduce V9fsVirtioState
for virtio transport.  Change virtio-pci and virtio-ccw to use
V9fsVirtioState.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This commit is contained in:
Wei Liu 2016-01-11 09:29:37 +00:00 • committed by Aneesh Kumar K.V
parent 2a0c56aa4c
commit 00588a0aa2
6 changed files with 71 additions and 40 deletions
Download patch file Download diff file Expand all files Collapse all files

78
hw/9pfs/virtio-9p-device.c
View file

@ -24,33 +24,41 @@
void virtio_9p_push_and_notify(V9fsPDU *pdu)
{
V9fsState *s = pdu->s;
V9fsVirtioState *v = container_of(s, V9fsVirtioState, state);
VirtQueueElement *elem = &v->elems[pdu->idx];
/* push onto queue and notify */
virtqueue_push(s->vq, &pdu->elem, pdu->size);
virtqueue_push(v->vq, elem, pdu->size);
/* FIXME: we should batch these completions */
virtio_notify(VIRTIO_DEVICE(s), s->vq);
virtio_notify(VIRTIO_DEVICE(v), v->vq);
}
static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
{
V9fsState *s = (V9fsState *)vdev;
V9fsVirtioState *v = (V9fsVirtioState *)vdev;
V9fsState *s = &v->state;
V9fsPDU *pdu;
ssize_t len;
while ((pdu = pdu_alloc(s)) &&
(len = virtqueue_pop(vq, &pdu->elem)) != 0) {
while ((pdu = pdu_alloc(s))) {
struct {
uint32_t size_le;
uint8_t id;
uint16_t tag_le;
} QEMU_PACKED out;
int len;
VirtQueueElement *elem = &v->elems[pdu->idx];
BUG_ON(pdu->elem.out_num == 0 || pdu->elem.in_num == 0);
len = virtqueue_pop(vq, elem);
if (!len) {
pdu_free(pdu);
break;
}
BUG_ON(elem->out_num == 0 || elem->in_num == 0);
QEMU_BUILD_BUG_ON(sizeof out != 7);
len = iov_to_buf(pdu->elem.out_sg, pdu->elem.out_num, 0,
len = iov_to_buf(elem->out_sg, elem->out_num, 0,
&out, sizeof out);
BUG_ON(len != sizeof out);
@ -62,7 +70,6 @@ static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
qemu_co_queue_init(&pdu->complete);
pdu_submit(pdu);
}
pdu_free(pdu);
}
static uint64_t virtio_9p_get_features(VirtIODevice *vdev, uint64_t features,
@ -76,14 +83,15 @@ static void virtio_9p_get_config(VirtIODevice *vdev, uint8_t *config)
{
int len;
struct virtio_9p_config *cfg;
V9fsState *s = VIRTIO_9P(vdev);
V9fsVirtioState *v = VIRTIO_9P(vdev);
V9fsState *s = &v->state;
len = strlen(s->tag);
cfg = g_malloc0(sizeof(struct virtio_9p_config) + len);
virtio_stw_p(vdev, &cfg->tag_len, len);
/* We don't copy the terminating null to config space */
memcpy(cfg->tag, s->tag, len);
memcpy(config, cfg, s->config_size);
memcpy(config, cfg, v->config_size);
g_free(cfg);
}
@ -100,16 +108,17 @@ static int virtio_9p_load(QEMUFile *f, void *opaque, int version_id)
static void virtio_9p_device_realize(DeviceState *dev, Error **errp)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
V9fsState *s = VIRTIO_9P(dev);
V9fsVirtioState *v = VIRTIO_9P(dev);
V9fsState *s = &v->state;
if (v9fs_device_realize_common(s, errp)) {
goto out;
}
s->config_size = sizeof(struct virtio_9p_config) + strlen(s->fsconf.tag);
virtio_init(vdev, "virtio-9p", VIRTIO_ID_9P, s->config_size);
s->vq = virtio_add_queue(vdev, MAX_REQ, handle_9p_output);
register_savevm(dev, "virtio-9p", -1, 1, virtio_9p_save, virtio_9p_load, s);
v->config_size = sizeof(struct virtio_9p_config) + strlen(s->fsconf.tag);
virtio_init(vdev, "virtio-9p", VIRTIO_ID_9P, v->config_size);
v->vq = virtio_add_queue(vdev, MAX_REQ, handle_9p_output);
register_savevm(dev, "virtio-9p", -1, 1, virtio_9p_save, virtio_9p_load, v);
out:
return;
@ -118,44 +127,55 @@ out:
static void virtio_9p_device_unrealize(DeviceState *dev, Error **errp)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
V9fsState *s = VIRTIO_9P(dev);
V9fsVirtioState *v = VIRTIO_9P(dev);
V9fsState *s = &v->state;
virtio_cleanup(vdev);
unregister_savevm(dev, "virtio-9p", s);
unregister_savevm(dev, "virtio-9p", v);
v9fs_device_unrealize_common(s, errp);
}
ssize_t virtio_pdu_vmarshal(V9fsPDU *pdu, size_t offset,
const char *fmt, va_list ap)
{
return v9fs_iov_vmarshal(pdu->elem.in_sg, pdu->elem.in_num,
offset, 1, fmt, ap);
V9fsState *s = pdu->s;
V9fsVirtioState *v = container_of(s, V9fsVirtioState, state);
VirtQueueElement *elem = &v->elems[pdu->idx];
return v9fs_iov_vmarshal(elem->in_sg, elem->in_num, offset, 1, fmt, ap);
}
ssize_t virtio_pdu_vunmarshal(V9fsPDU *pdu, size_t offset,
const char *fmt, va_list ap)
{
return v9fs_iov_vunmarshal(pdu->elem.out_sg, pdu->elem.out_num,
offset, 1, fmt, ap);
V9fsState *s = pdu->s;
V9fsVirtioState *v = container_of(s, V9fsVirtioState, state);
VirtQueueElement *elem = &v->elems[pdu->idx];
return v9fs_iov_vunmarshal(elem->out_sg, elem->out_num, offset, 1, fmt, ap);
}
void virtio_init_iov_from_pdu(V9fsPDU *pdu, struct iovec **piov,
unsigned int *pniov, bool is_write)
{
V9fsState *s = pdu->s;
V9fsVirtioState *v = container_of(s, V9fsVirtioState, state);
VirtQueueElement *elem = &v->elems[pdu->idx];
if (is_write) {
*piov = pdu->elem.out_sg;
*pniov = pdu->elem.out_num;
*piov = elem->out_sg;
*pniov = elem->out_num;
} else {
*piov = pdu->elem.in_sg;
*pniov = pdu->elem.in_num;
*piov = elem->in_sg;
*pniov = elem->in_num;
}
}
/* virtio-9p device */
static Property virtio_9p_properties[] = {
DEFINE_PROP_STRING("mount_tag", V9fsState, fsconf.tag),
DEFINE_PROP_STRING("fsdev", V9fsState, fsconf.fsdev_id),
DEFINE_PROP_STRING("mount_tag", V9fsVirtioState, state.fsconf.tag),
DEFINE_PROP_STRING("fsdev", V9fsVirtioState, state.fsconf.fsdev_id),
DEFINE_PROP_END_OF_LIST(),
};
@ -175,7 +195,7 @@ static void virtio_9p_class_init(ObjectClass *klass, void *data)
static const TypeInfo virtio_device_info = {
.name = TYPE_VIRTIO_9P,
.parent = TYPE_VIRTIO_DEVICE,
.instance_size = sizeof(V9fsState),
.instance_size = sizeof(V9fsVirtioState),
.class_init = virtio_9p_class_init,
};