*
*/
+#include "qemu/osdep.h"
#include "hw/virtio/virtio.h"
-#include "hw/virtio/virtio-9p.h"
-#include "hw/i386/pc.h"
#include "qemu/sockets.h"
#include "virtio-9p.h"
#include "fsdev/qemu-fsdev.h"
-#include "virtio-9p-xattr.h"
-#include "virtio-9p-coth.h"
+#include "coth.h"
#include "hw/virtio/virtio-access.h"
+#include "qemu/iov.h"
-static uint64_t virtio_9p_get_features(VirtIODevice *vdev, uint64_t features)
+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(v->vq, elem, pdu->size);
+ g_free(elem);
+ v->elems[pdu->idx] = NULL;
+
+ /* FIXME: we should batch these completions */
+ virtio_notify(VIRTIO_DEVICE(v), v->vq);
+}
+
+static void handle_9p_output(VirtIODevice *vdev, VirtQueue *vq)
+{
+ V9fsVirtioState *v = (V9fsVirtioState *)vdev;
+ V9fsState *s = &v->state;
+ V9fsPDU *pdu;
+ ssize_t len;
+ VirtQueueElement *elem;
+
+ while ((pdu = pdu_alloc(s))) {
+ struct {
+ uint32_t size_le;
+ uint8_t id;
+ uint16_t tag_le;
+ } QEMU_PACKED out;
+
+ elem = virtqueue_pop(vq, sizeof(VirtQueueElement));
+ if (!elem) {
+ goto out_free_pdu;
+ }
+
+ if (elem->in_num == 0) {
+ virtio_error(vdev,
+ "The guest sent a VirtFS request without space for "
+ "the reply");
+ goto out_free_req;
+ }
+ QEMU_BUILD_BUG_ON(sizeof(out) != 7);
+
+ v->elems[pdu->idx] = elem;
+ len = iov_to_buf(elem->out_sg, elem->out_num, 0,
+ &out, sizeof(out));
+ if (len != sizeof(out)) {
+ virtio_error(vdev, "The guest sent a malformed VirtFS request: "
+ "header size is %zd, should be 7", len);
+ goto out_free_req;
+ }
+
+ pdu->size = le32_to_cpu(out.size_le);
+
+ pdu->id = out.id;
+ pdu->tag = le16_to_cpu(out.tag_le);
+
+ qemu_co_queue_init(&pdu->complete);
+ pdu_submit(pdu);
+ }
+
+ return;
+
+out_free_req:
+ virtqueue_detach_element(vq, elem, 0);
+ g_free(elem);
+out_free_pdu:
+ pdu_free(pdu);
+}
+
+static uint64_t virtio_9p_get_features(VirtIODevice *vdev, uint64_t features,
+ Error **errp)
{
virtio_add_feature(&features, VIRTIO_9P_MOUNT_TAG);
return features;
{
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);
}
static void virtio_9p_device_realize(DeviceState *dev, Error **errp)
{
VirtIODevice *vdev = VIRTIO_DEVICE(dev);
- V9fsState *s = VIRTIO_9P(dev);
- int i, len;
- struct stat stat;
- FsDriverEntry *fse;
- V9fsPath path;
-
- virtio_init(vdev, "virtio-9p", VIRTIO_ID_9P,
- sizeof(struct virtio_9p_config) + MAX_TAG_LEN);
-
- /* initialize pdu allocator */
- QLIST_INIT(&s->free_list);
- QLIST_INIT(&s->active_list);
- for (i = 0; i < (MAX_REQ - 1); i++) {
- QLIST_INSERT_HEAD(&s->free_list, &s->pdus[i], next);
- }
+ V9fsVirtioState *v = VIRTIO_9P(dev);
+ V9fsState *s = &v->state;
- s->vq = virtio_add_queue(vdev, MAX_REQ, handle_9p_output);
+ if (v9fs_device_realize_common(s, errp)) {
+ goto out;
+ }
- v9fs_path_init(&path);
+ 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);
- fse = get_fsdev_fsentry(s->fsconf.fsdev_id);
+out:
+ return;
+}
- if (!fse) {
- /* We don't have a fsdev identified by fsdev_id */
- error_setg(errp, "Virtio-9p device couldn't find fsdev with the "
- "id = %s",
- s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL");
- goto out;
- }
+static void virtio_9p_device_unrealize(DeviceState *dev, Error **errp)
+{
+ VirtIODevice *vdev = VIRTIO_DEVICE(dev);
+ V9fsVirtioState *v = VIRTIO_9P(dev);
+ V9fsState *s = &v->state;
- if (!s->fsconf.tag) {
- /* we haven't specified a mount_tag */
- error_setg(errp, "fsdev with id %s needs mount_tag arguments",
- s->fsconf.fsdev_id);
- goto out;
- }
+ virtio_cleanup(vdev);
+ v9fs_device_unrealize_common(s, errp);
+}
- s->ctx.export_flags = fse->export_flags;
- s->ctx.fs_root = g_strdup(fse->path);
- s->ctx.exops.get_st_gen = NULL;
- len = strlen(s->fsconf.tag);
- if (len > MAX_TAG_LEN - 1) {
- error_setg(errp, "mount tag '%s' (%d bytes) is longer than "
- "maximum (%d bytes)", s->fsconf.tag, len, MAX_TAG_LEN - 1);
- goto out;
- }
+ssize_t virtio_pdu_vmarshal(V9fsPDU *pdu, size_t offset,
+ const char *fmt, va_list ap)
+{
+ V9fsState *s = pdu->s;
+ V9fsVirtioState *v = container_of(s, V9fsVirtioState, state);
+ VirtQueueElement *elem = v->elems[pdu->idx];
- s->tag = g_strdup(s->fsconf.tag);
- s->ctx.uid = -1;
+ return v9fs_iov_vmarshal(elem->in_sg, elem->in_num, offset, 1, fmt, ap);
+}
- s->ops = fse->ops;
- s->config_size = sizeof(struct virtio_9p_config) + len;
- s->fid_list = NULL;
- qemu_co_rwlock_init(&s->rename_lock);
+ssize_t virtio_pdu_vunmarshal(V9fsPDU *pdu, size_t offset,
+ const char *fmt, va_list ap)
+{
+ V9fsState *s = pdu->s;
+ V9fsVirtioState *v = container_of(s, V9fsVirtioState, state);
+ VirtQueueElement *elem = v->elems[pdu->idx];
- if (s->ops->init(&s->ctx) < 0) {
- error_setg(errp, "Virtio-9p Failed to initialize fs-driver with id:%s"
- " and export path:%s", s->fsconf.fsdev_id, s->ctx.fs_root);
- goto out;
- }
- if (v9fs_init_worker_threads() < 0) {
- error_setg(errp, "worker thread initialization failed");
- goto out;
- }
+ return v9fs_iov_vunmarshal(elem->out_sg, elem->out_num, offset, 1, fmt, ap);
+}
- /*
- * Check details of export path, We need to use fs driver
- * call back to do that. Since we are in the init path, we don't
- * use co-routines here.
- */
- if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) {
- error_setg(errp,
- "error in converting name to path %s", strerror(errno));
- goto out;
- }
- if (s->ops->lstat(&s->ctx, &path, &stat)) {
- error_setg(errp, "share path %s does not exist", fse->path);
- goto out;
- } else if (!S_ISDIR(stat.st_mode)) {
- error_setg(errp, "share path %s is not a directory", fse->path);
- goto out;
+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 = elem->out_sg;
+ *pniov = elem->out_num;
+ } else {
+ *piov = elem->in_sg;
+ *pniov = elem->in_num;
}
- v9fs_path_free(&path);
-
- return;
-out:
- g_free(s->ctx.fs_root);
- g_free(s->tag);
- virtio_cleanup(vdev);
- v9fs_path_free(&path);
}
/* virtio-9p device */
+static const VMStateDescription vmstate_virtio_9p = {
+ .name = "virtio-9p",
+ .minimum_version_id = 1,
+ .version_id = 1,
+ .fields = (VMStateField[]) {
+ VMSTATE_VIRTIO_DEVICE,
+ VMSTATE_END_OF_LIST()
+ },
+};
+
static Property virtio_9p_properties[] = {
- DEFINE_VIRTIO_9P_PROPERTIES(V9fsState, fsconf),
+ DEFINE_PROP_STRING("mount_tag", V9fsVirtioState, state.fsconf.tag),
+ DEFINE_PROP_STRING("fsdev", V9fsVirtioState, state.fsconf.fsdev_id),
DEFINE_PROP_END_OF_LIST(),
};
VirtioDeviceClass *vdc = VIRTIO_DEVICE_CLASS(klass);
dc->props = virtio_9p_properties;
+ dc->vmsd = &vmstate_virtio_9p;
set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
vdc->realize = virtio_9p_device_realize;
+ vdc->unrealize = virtio_9p_device_unrealize;
vdc->get_features = virtio_9p_get_features;
vdc->get_config = virtio_9p_get_config;
}
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,
};
projects / mirror_qemu.git / blobdiff