void rbd_destroy(struct rbd *d)
{
vmm_host_ram_reserve(d->addr, d->size);
vmm_blockdev_unregister(d->bdev);
vmm_blockdev_free(d->bdev);
vmm_free(d);
}
static struct rbd *__rbd_create(struct vmm_device *dev,
const char *name,
physical_addr_t pa,
physical_size_t sz)
{
struct rbd *d;
if (!name) {
return NULL;
}
d = vmm_zalloc(sizeof(struct rbd));
if (!d) {
goto free_nothing;
}
d->addr = pa;
d->size = sz;
d->bdev = vmm_blockdev_alloc();
if (!d->bdev) {
goto free_rbd;
}
/* Setup block device instance */
strncpy(d->bdev->name, name, VMM_FIELD_NAME_SIZE);
strncpy(d->bdev->desc, "RAM backed block device",
VMM_FIELD_DESC_SIZE);
d->bdev->dev = dev;
d->bdev->flags = VMM_BLOCKDEV_RW;
d->bdev->start_lba = 0;
d->bdev->num_blocks = udiv64(d->size, RBD_BLOCK_SIZE);
d->bdev->block_size = RBD_BLOCK_SIZE;
/* Setup request queue for block device instance */
d->bdev->rq->make_request = rbd_make_request;
d->bdev->rq->abort_request = rbd_abort_request;
d->bdev->rq->priv = d;
/* Register block device instance */
if (vmm_blockdev_register(d->bdev)) {
goto free_bdev;
}
/* Reserve RAM space */
if (vmm_host_ram_reserve(d->addr, d->size)) {
goto unreg_bdev;
}
return d;
unreg_bdev:
vmm_blockdev_unregister(d->bdev);
free_bdev:
vmm_blockdev_free(d->bdev);
free_rbd:
vmm_free(d);
free_nothing:
return NULL;
}
static int cmd_host_ram_reserve(struct vmm_chardev *cdev, physical_addr_t paddr, int size)
{
return vmm_host_ram_reserve(paddr, size);
}