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;
}
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);
}