return list_empty(&bo->cb_list) ? -EOPNOTSUPP : 0;
}
EXPORT_SYMBOL(flow_indr_dev_setup_offload);
-
-static LIST_HEAD(block_cb_list);
-
-static struct rhashtable indr_setup_block_ht;
-
-struct flow_indr_block_cb {
- struct list_head list;
- void *cb_priv;
- flow_indr_block_bind_cb_t *cb;
- void *cb_ident;
-};
-
-struct flow_indr_block_dev {
- struct rhash_head ht_node;
- struct net_device *dev;
- unsigned int refcnt;
- struct list_head cb_list;
-};
-
-static const struct rhashtable_params flow_indr_setup_block_ht_params = {
- .key_offset = offsetof(struct flow_indr_block_dev, dev),
- .head_offset = offsetof(struct flow_indr_block_dev, ht_node),
- .key_len = sizeof(struct net_device *),
-};
-
-static struct flow_indr_block_dev *
-flow_indr_block_dev_lookup(struct net_device *dev)
-{
- return rhashtable_lookup_fast(&indr_setup_block_ht, &dev,
- flow_indr_setup_block_ht_params);
-}
-
-static struct flow_indr_block_dev *
-flow_indr_block_dev_get(struct net_device *dev)
-{
- struct flow_indr_block_dev *indr_dev;
-
- indr_dev = flow_indr_block_dev_lookup(dev);
- if (indr_dev)
- goto inc_ref;
-
- indr_dev = kzalloc(sizeof(*indr_dev), GFP_KERNEL);
- if (!indr_dev)
- return NULL;
-
- INIT_LIST_HEAD(&indr_dev->cb_list);
- indr_dev->dev = dev;
- if (rhashtable_insert_fast(&indr_setup_block_ht, &indr_dev->ht_node,
- flow_indr_setup_block_ht_params)) {
- kfree(indr_dev);
- return NULL;
- }
-
-inc_ref:
- indr_dev->refcnt++;
- return indr_dev;
-}
-
-static void flow_indr_block_dev_put(struct flow_indr_block_dev *indr_dev)
-{
- if (--indr_dev->refcnt)
- return;
-
- rhashtable_remove_fast(&indr_setup_block_ht, &indr_dev->ht_node,
- flow_indr_setup_block_ht_params);
- kfree(indr_dev);
-}
-
-static struct flow_indr_block_cb *
-flow_indr_block_cb_lookup(struct flow_indr_block_dev *indr_dev,
- flow_indr_block_bind_cb_t *cb, void *cb_ident)
-{
- struct flow_indr_block_cb *indr_block_cb;
-
- list_for_each_entry(indr_block_cb, &indr_dev->cb_list, list)
- if (indr_block_cb->cb == cb &&
- indr_block_cb->cb_ident == cb_ident)
- return indr_block_cb;
- return NULL;
-}
-
-static struct flow_indr_block_cb *
-flow_indr_block_cb_add(struct flow_indr_block_dev *indr_dev, void *cb_priv,
- flow_indr_block_bind_cb_t *cb, void *cb_ident)
-{
- struct flow_indr_block_cb *indr_block_cb;
-
- indr_block_cb = flow_indr_block_cb_lookup(indr_dev, cb, cb_ident);
- if (indr_block_cb)
- return ERR_PTR(-EEXIST);
-
- indr_block_cb = kzalloc(sizeof(*indr_block_cb), GFP_KERNEL);
- if (!indr_block_cb)
- return ERR_PTR(-ENOMEM);
-
- indr_block_cb->cb_priv = cb_priv;
- indr_block_cb->cb = cb;
- indr_block_cb->cb_ident = cb_ident;
- list_add(&indr_block_cb->list, &indr_dev->cb_list);
-
- return indr_block_cb;
-}
-
-static void flow_indr_block_cb_del(struct flow_indr_block_cb *indr_block_cb)
-{
- list_del(&indr_block_cb->list);
- kfree(indr_block_cb);
-}
-
-static DEFINE_MUTEX(flow_indr_block_cb_lock);
-
-static void flow_block_cmd(struct net_device *dev,
- flow_indr_block_bind_cb_t *cb, void *cb_priv,
- enum flow_block_command command)
-{
- struct flow_indr_block_entry *entry;
-
- mutex_lock(&flow_indr_block_cb_lock);
- list_for_each_entry(entry, &block_cb_list, list) {
- entry->cb(dev, cb, cb_priv, command);
- }
- mutex_unlock(&flow_indr_block_cb_lock);
-}
-
-int __flow_indr_block_cb_register(struct net_device *dev, void *cb_priv,
- flow_indr_block_bind_cb_t *cb,
- void *cb_ident)
-{
- struct flow_indr_block_cb *indr_block_cb;
- struct flow_indr_block_dev *indr_dev;
- int err;
-
- indr_dev = flow_indr_block_dev_get(dev);
- if (!indr_dev)
- return -ENOMEM;
-
- indr_block_cb = flow_indr_block_cb_add(indr_dev, cb_priv, cb, cb_ident);
- err = PTR_ERR_OR_ZERO(indr_block_cb);
- if (err)
- goto err_dev_put;
-
- flow_block_cmd(dev, indr_block_cb->cb, indr_block_cb->cb_priv,
- FLOW_BLOCK_BIND);
-
- return 0;
-
-err_dev_put:
- flow_indr_block_dev_put(indr_dev);
- return err;
-}
-EXPORT_SYMBOL_GPL(__flow_indr_block_cb_register);
-
-int flow_indr_block_cb_register(struct net_device *dev, void *cb_priv,
- flow_indr_block_bind_cb_t *cb,
- void *cb_ident)
-{
- int err;
-
- rtnl_lock();
- err = __flow_indr_block_cb_register(dev, cb_priv, cb, cb_ident);
- rtnl_unlock();
-
- return err;
-}
-EXPORT_SYMBOL_GPL(flow_indr_block_cb_register);
-
-void __flow_indr_block_cb_unregister(struct net_device *dev,
- flow_indr_block_bind_cb_t *cb,
- void *cb_ident)
-{
- struct flow_indr_block_cb *indr_block_cb;
- struct flow_indr_block_dev *indr_dev;
-
- indr_dev = flow_indr_block_dev_lookup(dev);
- if (!indr_dev)
- return;
-
- indr_block_cb = flow_indr_block_cb_lookup(indr_dev, cb, cb_ident);
- if (!indr_block_cb)
- return;
-
- flow_block_cmd(dev, indr_block_cb->cb, indr_block_cb->cb_priv,
- FLOW_BLOCK_UNBIND);
-
- flow_indr_block_cb_del(indr_block_cb);
- flow_indr_block_dev_put(indr_dev);
-}
-EXPORT_SYMBOL_GPL(__flow_indr_block_cb_unregister);
-
-void flow_indr_block_cb_unregister(struct net_device *dev,
- flow_indr_block_bind_cb_t *cb,
- void *cb_ident)
-{
- rtnl_lock();
- __flow_indr_block_cb_unregister(dev, cb, cb_ident);
- rtnl_unlock();
-}
-EXPORT_SYMBOL_GPL(flow_indr_block_cb_unregister);
-
-void flow_indr_block_call(struct net_device *dev,
- struct flow_block_offload *bo,
- enum flow_block_command command,
- enum tc_setup_type type)
-{
- struct flow_indr_block_cb *indr_block_cb;
- struct flow_indr_block_dev *indr_dev;
-
- indr_dev = flow_indr_block_dev_lookup(dev);
- if (!indr_dev)
- return;
-
- list_for_each_entry(indr_block_cb, &indr_dev->cb_list, list)
- indr_block_cb->cb(dev, indr_block_cb->cb_priv, type, bo);
-}
-EXPORT_SYMBOL_GPL(flow_indr_block_call);
-
-void flow_indr_add_block_cb(struct flow_indr_block_entry *entry)
-{
- mutex_lock(&flow_indr_block_cb_lock);
- list_add_tail(&entry->list, &block_cb_list);
- mutex_unlock(&flow_indr_block_cb_lock);
-}
-EXPORT_SYMBOL_GPL(flow_indr_add_block_cb);
-
-void flow_indr_del_block_cb(struct flow_indr_block_entry *entry)
-{
- mutex_lock(&flow_indr_block_cb_lock);
- list_del(&entry->list);
- mutex_unlock(&flow_indr_block_cb_lock);
-}
-EXPORT_SYMBOL_GPL(flow_indr_del_block_cb);
-
-static int __init init_flow_indr_rhashtable(void)
-{
- return rhashtable_init(&indr_setup_block_ht,
- &flow_indr_setup_block_ht_params);
-}
-subsys_initcall(init_flow_indr_rhashtable);
projects / linux-2.6-microblaze.git / blobdiff