VirtIODevice *virtio_9p_init(DeviceState *dev, V9fsConf *conf) { V9fsState *s; int i, len; struct stat stat; FsTypeEntry *fse; 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); 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); exit(1); } if (!fse->path || !conf->tag) { /* we haven't specified a mount_tag or the path */ fprintf(stderr, "fsdev with id %s needs path " "and Virtio-9p device needs mount_tag arguments\n", conf->fsdev_id); exit(1); } if (!strcmp(fse->security_model, "passthrough")) { /* Files on the Fileserver set to client user credentials */ s->ctx.fs_sm = SM_PASSTHROUGH; } else if (!strcmp(fse->security_model, "mapped")) { /* Files on the fileserver are set to QEMU credentials. * Client user credentials are saved in extended attributes. */ s->ctx.fs_sm = SM_MAPPED; } else { /* user haven't specified a correct security option */ fprintf(stderr, "one of the following must be specified as the" "security option:\n\t security_model=passthrough \n\t " "security_model=mapped\n"); return NULL; } if (lstat(fse->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); } s->ctx.fs_root = qemu_strdup(fse->path); len = strlen(conf->tag); if (len > MAX_TAG_LEN) { len = MAX_TAG_LEN; } /* s->tag is non-NULL terminated string */ s->tag = qemu_malloc(len); memcpy(s->tag, conf->tag, len); s->tag_len = len; s->ctx.uid = -1; s->ops = fse->ops; s->vdev.get_features = virtio_9p_get_features; s->config_size = sizeof(struct virtio_9p_config) + s->tag_len; s->vdev.get_config = virtio_9p_get_config; return &s->vdev; }