int vmm_blockdev_register(struct vmm_blockdev *bdev)
{
int rc;
struct vmm_classdev *cd;
struct vmm_blockdev_event event;
if (!bdev) {
return VMM_EFAIL;
}
if (!(bdev->flags & VMM_BLOCKDEV_RDONLY) &&
!(bdev->flags & VMM_BLOCKDEV_RW)) {
return VMM_EINVALID;
}
cd = vmm_malloc(sizeof(struct vmm_classdev));
if (!cd) {
rc = VMM_ENOMEM;
goto fail;
}
INIT_LIST_HEAD(&cd->head);
if (strlcpy(cd->name, bdev->name, sizeof(cd->name)) >=
sizeof(cd->name)) {
rc = VMM_EOVERFLOW;
goto free_classdev;
}
cd->dev = bdev->dev;
cd->priv = bdev;
rc = vmm_devdrv_register_classdev(VMM_BLOCKDEV_CLASS_NAME, cd);
if (rc) {
goto free_classdev;
}
/* Broadcast register event */
event.bdev = bdev;
event.data = NULL;
vmm_blocking_notifier_call(&bdev_notifier_chain,
VMM_BLOCKDEV_EVENT_REGISTER,
&event);
return VMM_OK;
free_classdev:
vmm_free(cd);
fail:
return rc;
}
int vmm_blockdev_unregister(struct vmm_blockdev *bdev)
{
int rc;
struct dlist *l;
struct vmm_blockdev *child_bdev;
struct vmm_blockdev_event event;
struct vmm_classdev *cd;
if (!bdev) {
return VMM_EFAIL;
}
/* Unreg & free child block devices */
vmm_mutex_lock(&bdev->child_lock);
while (!list_empty(&bdev->child_list)) {
l = list_pop(&bdev->child_list);
child_bdev = list_entry(l, struct vmm_blockdev, head);
if ((rc = vmm_blockdev_unregister(child_bdev))) {
vmm_mutex_unlock(&bdev->child_lock);
return rc;
}
__blockdev_free(child_bdev, FALSE);
}
vmm_mutex_unlock(&bdev->child_lock);
/* Broadcast unregister event */
event.bdev = bdev;
event.data = NULL;
vmm_blocking_notifier_call(&bdev_notifier_chain,
VMM_BLOCKDEV_EVENT_UNREGISTER,
&event);
cd = vmm_devdrv_find_classdev(VMM_BLOCKDEV_CLASS_NAME, bdev->name);
if (!cd) {
return VMM_EFAIL;
}
rc = vmm_devdrv_unregister_classdev(VMM_BLOCKDEV_CLASS_NAME, cd);
if (!rc) {
vmm_free(cd);
}
return rc;
}
/**
* Notify clients of fb_events
*/
int fb_notifier_call_chain(unsigned long val, void *v)
{
return vmm_blocking_notifier_call(&fb_notifier_list, val, v);
}
