net: sched: introduce per-block callbacks
Introduce infrastructure that allows drivers to register callbacks that are called whenever tc would offload inserted rule for a specific block. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -27,6 +27,8 @@ struct tcf_block_ext_info {
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enum tcf_block_binder_type binder_type;
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};
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struct tcf_block_cb;
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#ifdef CONFIG_NET_CLS
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struct tcf_chain *tcf_chain_get(struct tcf_block *block, u32 chain_index,
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bool create);
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@ -51,6 +53,21 @@ static inline struct net_device *tcf_block_dev(struct tcf_block *block)
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return tcf_block_q(block)->dev_queue->dev;
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}
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void *tcf_block_cb_priv(struct tcf_block_cb *block_cb);
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struct tcf_block_cb *tcf_block_cb_lookup(struct tcf_block *block,
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tc_setup_cb_t *cb, void *cb_ident);
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void tcf_block_cb_incref(struct tcf_block_cb *block_cb);
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unsigned int tcf_block_cb_decref(struct tcf_block_cb *block_cb);
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struct tcf_block_cb *__tcf_block_cb_register(struct tcf_block *block,
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tc_setup_cb_t *cb, void *cb_ident,
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void *cb_priv);
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int tcf_block_cb_register(struct tcf_block *block,
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tc_setup_cb_t *cb, void *cb_ident,
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void *cb_priv);
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void __tcf_block_cb_unregister(struct tcf_block_cb *block_cb);
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void tcf_block_cb_unregister(struct tcf_block *block,
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tc_setup_cb_t *cb, void *cb_ident);
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int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
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struct tcf_result *res, bool compat_mode);
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@ -91,6 +108,70 @@ static inline struct net_device *tcf_block_dev(struct tcf_block *block)
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return NULL;
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}
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static inline
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int tc_setup_cb_block_register(struct tcf_block *block, tc_setup_cb_t *cb,
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void *cb_priv)
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{
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return 0;
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}
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static inline
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void tc_setup_cb_block_unregister(struct tcf_block *block, tc_setup_cb_t *cb,
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void *cb_priv)
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{
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}
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static inline
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void *tcf_block_cb_priv(struct tcf_block_cb *block_cb)
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{
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return NULL;
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}
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static inline
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struct tcf_block_cb *tcf_block_cb_lookup(struct tcf_block *block,
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tc_setup_cb_t *cb, void *cb_ident)
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{
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return NULL;
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}
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static inline
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void tcf_block_cb_incref(struct tcf_block_cb *block_cb)
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{
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}
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static inline
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unsigned int tcf_block_cb_decref(struct tcf_block_cb *block_cb)
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{
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return 0;
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}
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static inline
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struct tcf_block_cb *__tcf_block_cb_register(struct tcf_block *block,
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tc_setup_cb_t *cb, void *cb_ident,
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void *cb_priv)
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{
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return NULL;
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}
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static inline
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int tcf_block_cb_register(struct tcf_block *block,
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tc_setup_cb_t *cb, void *cb_ident,
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void *cb_priv)
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{
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return 0;
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}
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static inline
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void __tcf_block_cb_unregister(struct tcf_block_cb *block_cb)
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{
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}
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static inline
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void tcf_block_cb_unregister(struct tcf_block *block,
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tc_setup_cb_t *cb, void *cb_ident)
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{
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}
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static inline int tcf_classify(struct sk_buff *skb, const struct tcf_proto *tp,
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struct tcf_result *res, bool compat_mode)
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{
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@ -272,6 +272,7 @@ struct tcf_block {
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struct list_head chain_list;
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struct net *net;
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struct Qdisc *q;
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struct list_head cb_list;
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};
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static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz)
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@ -278,6 +278,8 @@ int tcf_block_get_ext(struct tcf_block **p_block,
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if (!block)
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return -ENOMEM;
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INIT_LIST_HEAD(&block->chain_list);
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INIT_LIST_HEAD(&block->cb_list);
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/* Create chain 0 by default, it has to be always present. */
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chain = tcf_chain_create(block, 0);
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if (!chain) {
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@ -354,6 +356,109 @@ void tcf_block_put(struct tcf_block *block)
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}
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EXPORT_SYMBOL(tcf_block_put);
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struct tcf_block_cb {
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struct list_head list;
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tc_setup_cb_t *cb;
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void *cb_ident;
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void *cb_priv;
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unsigned int refcnt;
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};
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void *tcf_block_cb_priv(struct tcf_block_cb *block_cb)
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{
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return block_cb->cb_priv;
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}
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EXPORT_SYMBOL(tcf_block_cb_priv);
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struct tcf_block_cb *tcf_block_cb_lookup(struct tcf_block *block,
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tc_setup_cb_t *cb, void *cb_ident)
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{ struct tcf_block_cb *block_cb;
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list_for_each_entry(block_cb, &block->cb_list, list)
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if (block_cb->cb == cb && block_cb->cb_ident == cb_ident)
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return block_cb;
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return NULL;
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}
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EXPORT_SYMBOL(tcf_block_cb_lookup);
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void tcf_block_cb_incref(struct tcf_block_cb *block_cb)
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{
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block_cb->refcnt++;
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}
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EXPORT_SYMBOL(tcf_block_cb_incref);
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unsigned int tcf_block_cb_decref(struct tcf_block_cb *block_cb)
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{
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return --block_cb->refcnt;
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}
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EXPORT_SYMBOL(tcf_block_cb_decref);
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struct tcf_block_cb *__tcf_block_cb_register(struct tcf_block *block,
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tc_setup_cb_t *cb, void *cb_ident,
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void *cb_priv)
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{
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struct tcf_block_cb *block_cb;
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block_cb = kzalloc(sizeof(*block_cb), GFP_KERNEL);
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if (!block_cb)
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return NULL;
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block_cb->cb = cb;
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block_cb->cb_ident = cb_ident;
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block_cb->cb_priv = cb_priv;
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list_add(&block_cb->list, &block->cb_list);
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return block_cb;
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}
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EXPORT_SYMBOL(__tcf_block_cb_register);
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int tcf_block_cb_register(struct tcf_block *block,
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tc_setup_cb_t *cb, void *cb_ident,
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void *cb_priv)
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{
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struct tcf_block_cb *block_cb;
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block_cb = __tcf_block_cb_register(block, cb, cb_ident, cb_priv);
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return block_cb ? 0 : -ENOMEM;
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}
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EXPORT_SYMBOL(tcf_block_cb_register);
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void __tcf_block_cb_unregister(struct tcf_block_cb *block_cb)
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{
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list_del(&block_cb->list);
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kfree(block_cb);
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}
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EXPORT_SYMBOL(__tcf_block_cb_unregister);
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void tcf_block_cb_unregister(struct tcf_block *block,
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tc_setup_cb_t *cb, void *cb_ident)
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{
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struct tcf_block_cb *block_cb;
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block_cb = tcf_block_cb_lookup(block, cb, cb_ident);
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if (!block_cb)
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return;
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__tcf_block_cb_unregister(block_cb);
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}
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EXPORT_SYMBOL(tcf_block_cb_unregister);
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static int tcf_block_cb_call(struct tcf_block *block, enum tc_setup_type type,
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void *type_data, bool err_stop)
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{
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struct tcf_block_cb *block_cb;
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int ok_count = 0;
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int err;
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list_for_each_entry(block_cb, &block->cb_list, list) {
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err = block_cb->cb(type, type_data, block_cb->cb_priv);
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if (err) {
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if (err_stop)
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return err;
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} else {
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ok_count++;
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}
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}
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return ok_count;
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}
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/* Main classifier routine: scans classifier chain attached
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* to this qdisc, (optionally) tests for protocol and asks
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* specific classifiers.
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