示例#1
0
VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf)
{
    V9fsState *s;
    int i, len;
    struct stat stat;
    FsDriverEntry *fse;
    V9fsPath path;

    s = (V9fsState *)virtio_common_init("virtio-9p",
                                    VIRTIO_ID_9P,
                                    sizeof(struct virtio_9p_config)+
                                    MAX_TAG_LEN,
                                    sizeof(V9fsState));
    /* 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);
    }

    s->vq = virtio_add_queue(&s->vdev, MAX_REQ, handle_9p_output);

    fse = get_fsdev_fsentry(conf->fsdev_id);

    if (!fse) {
        /* We don't have a fsdev identified by fsdev_id */
        fprintf(stderr, "Virtio-9p device couldn't find fsdev with the "
                "id = %s\n", conf->fsdev_id ? conf->fsdev_id : "NULL");
        exit(1);
    }

    if (!conf->tag) {
        /* we haven't specified a mount_tag */
        fprintf(stderr, "fsdev with id %s needs mount_tag arguments\n",
                conf->fsdev_id);
        exit(1);
    }

    s->ctx.export_flags = fse->export_flags;
    s->ctx.fs_root = g_strdup(fse->path);
    s->ctx.exops.get_st_gen = NULL;
    len = strlen(conf->tag);
    if (len > MAX_TAG_LEN - 1) {
        fprintf(stderr, "mount tag '%s' (%d bytes) is longer than "
                "maximum (%d bytes)", conf->tag, len, MAX_TAG_LEN - 1);
        exit(1);
    }

    s->tag = g_strdup(conf->tag);
    s->ctx.uid = -1;

    s->ops = fse->ops;
    s->vdev.get_features = virtio_9p_get_features;
    s->config_size = sizeof(struct virtio_9p_config) + len;
    s->vdev.get_config = virtio_9p_get_config;
    s->fid_list = NULL;
    qemu_co_rwlock_init(&s->rename_lock);

    if (s->ops->init(&s->ctx) < 0) {
        fprintf(stderr, "Virtio-9p Failed to initialize fs-driver with id:%s"
                " and export path:%s\n", conf->fsdev_id, s->ctx.fs_root);
        exit(1);
    }
    if (v9fs_init_worker_threads() < 0) {
        fprintf(stderr, "worker thread initialization failed\n");
        exit(1);
    }

    /*
     * 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.
     */
    v9fs_path_init(&path);
    if (s->ops->name_to_path(&s->ctx, NULL, "/", &path) < 0) {
        fprintf(stderr,
                "error in converting name to path %s", strerror(errno));
        exit(1);
    }
    if (s->ops->lstat(&s->ctx, &path, &stat)) {
        fprintf(stderr, "share path %s does not exist\n", fse->path);
        exit(1);
    } else if (!S_ISDIR(stat.st_mode)) {
        fprintf(stderr, "share path %s is not a directory\n", fse->path);
        exit(1);
    }
    v9fs_path_free(&path);

    return &s->vdev;
}
示例#2
0
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);
    }

    s->vq = virtio_add_queue(vdev, MAX_REQ, handle_9p_output);

    v9fs_path_init(&path);

    fse = get_fsdev_fsentry(s->fsconf.fsdev_id);

    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;
    }

    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;
    }

    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;
    }

    s->tag = g_strdup(s->fsconf.tag);
    s->ctx.uid = -1;

    s->ops = fse->ops;
    s->config_size = sizeof(struct virtio_9p_config) + len;
    s->fid_list = NULL;
    qemu_co_rwlock_init(&s->rename_lock);

    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;
    }

    /*
     * 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;
    }
    v9fs_path_free(&path);

    register_savevm(dev, "virtio-9p", -1, 1, virtio_9p_save, virtio_9p_load, s);
    return;
out:
    g_free(s->ctx.fs_root);
    g_free(s->tag);
    virtio_cleanup(vdev);
    v9fs_path_free(&path);
}