static int virtio_9p_device_init(VirtIODevice *vdev) { V9fsState *s = VIRTIO_9P(vdev); int i, len; struct stat stat; FsDriverEntry *fse; V9fsPath path; virtio_init(VIRTIO_DEVICE(s), "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); fse = get_fsdev_fsentry(s->fsconf.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", s->fsconf.fsdev_id ? s->fsconf.fsdev_id : "NULL"); goto out; } if (!s->fsconf.tag) { /* we haven't specified a mount_tag */ fprintf(stderr, "fsdev with id %s needs mount_tag arguments\n", 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) { fprintf(stderr, "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) { fprintf(stderr, "Virtio-9p Failed to initialize fs-driver with id:%s" " and export path:%s\n", s->fsconf.fsdev_id, s->ctx.fs_root); goto out; } if (v9fs_init_worker_threads() < 0) { fprintf(stderr, "worker thread initialization failed\n"); 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. */ 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)); goto out; } if (s->ops->lstat(&s->ctx, &path, &stat)) { fprintf(stderr, "share path %s does not exist\n", fse->path); goto out; } else if (!S_ISDIR(stat.st_mode)) { fprintf(stderr, "share path %s is not a directory\n", fse->path); goto out; } v9fs_path_free(&path); return 0; out: g_free(s->ctx.fs_root); g_free(s->tag); virtio_cleanup(vdev); v9fs_path_free(&path); return -1; }