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net: sched: add block bind/unbind notif. and extended block_get/put

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Introduce new type of ndo_setup_tc message to propage binding/unbinding
of a block to driver. Call this ndo whenever qdisc gets/puts a block.
Alongside with this, there's need to propagate binder type from qdisc
code down to the notifier. So introduce extended variants of
block_get/put in order to pass this info.

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2017-10-19 15:50:29 +02:00 committed by David S. Miller
parent b65f164d37
commit 8c4083b30e
3 changed files with 94 additions and 3 deletions
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1
include/linux/netdevice.h
View File

@ -775,6 +775,7 @@ enum tc_setup_type {
TC_SETUP_CLSFLOWER,
TC_SETUP_CLSMATCHALL,
TC_SETUP_CLSBPF,
TC_SETUP_BLOCK,
};
/* These structures hold the attributes of xdp state that are being passed

40
include/net/pkt_cls.h
View File

@ -17,13 +17,27 @@ struct tcf_walker {
int register_tcf_proto_ops(struct tcf_proto_ops *ops);
int unregister_tcf_proto_ops(struct tcf_proto_ops *ops);
enum tcf_block_binder_type {
TCF_BLOCK_BINDER_TYPE_UNSPEC,
};
struct tcf_block_ext_info {
enum tcf_block_binder_type binder_type;
};
#ifdef CONFIG_NET_CLS
struct tcf_chain *tcf_chain_get(struct tcf_block *block, u32 chain_index,
bool create);
void tcf_chain_put(struct tcf_chain *chain);
int tcf_block_get(struct tcf_block **p_block,
struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q);
int tcf_block_get_ext(struct tcf_block **p_block,
struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
struct tcf_block_ext_info *ei);
void tcf_block_put(struct tcf_block *block);
void tcf_block_put_ext(struct tcf_block *block,
struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
struct tcf_block_ext_info *ei);
static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
{
@ -46,10 +60,25 @@ int tcf_block_get(struct tcf_block **p_block,
return 0;
}
static inline
int tcf_block_get_ext(struct tcf_block **p_block,
struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
struct tcf_block_ext_info *ei)
{
return 0;
}
static inline void tcf_block_put(struct tcf_block *block)
{
}
static inline
void tcf_block_put_ext(struct tcf_block *block,
struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
struct tcf_block_ext_info *ei)
{
}
static inline struct Qdisc *tcf_block_q(struct tcf_block *block)
{
return NULL;
@ -434,6 +463,17 @@ tcf_match_indev(struct sk_buff *skb, int ifindex)
int tc_setup_cb_call(struct tcf_exts *exts, enum tc_setup_type type,
void *type_data, bool err_stop);
enum tc_block_command {
TC_BLOCK_BIND,
TC_BLOCK_UNBIND,
};
struct tc_block_offload {
enum tc_block_command command;
enum tcf_block_binder_type binder_type;
struct tcf_block *block;
};
struct tc_cls_common_offload {
u32 chain_index;
__be16 protocol;

56
net/sched/cls_api.c
View File

@ -240,8 +240,36 @@ tcf_chain_filter_chain_ptr_set(struct tcf_chain *chain,
chain->p_filter_chain = p_filter_chain;
}
int tcf_block_get(struct tcf_block **p_block,
struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q)
static void tcf_block_offload_cmd(struct tcf_block *block, struct Qdisc *q,
struct tcf_block_ext_info *ei,
enum tc_block_command command)
{
struct net_device *dev = q->dev_queue->dev;
struct tc_block_offload bo = {};
if (!tc_can_offload(dev))
return;
bo.command = command;
bo.binder_type = ei->binder_type;
bo.block = block;
dev->netdev_ops->ndo_setup_tc(dev, TC_SETUP_BLOCK, &bo);
}
static void tcf_block_offload_bind(struct tcf_block *block, struct Qdisc *q,
struct tcf_block_ext_info *ei)
{
tcf_block_offload_cmd(block, q, ei, TC_BLOCK_BIND);
}
static void tcf_block_offload_unbind(struct tcf_block *block, struct Qdisc *q,
struct tcf_block_ext_info *ei)
{
tcf_block_offload_cmd(block, q, ei, TC_BLOCK_UNBIND);
}
int tcf_block_get_ext(struct tcf_block **p_block,
struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
struct tcf_block_ext_info *ei)
{
struct tcf_block *block = kzalloc(sizeof(*block), GFP_KERNEL);
struct tcf_chain *chain;
@ -259,6 +287,7 @@ int tcf_block_get(struct tcf_block **p_block,
tcf_chain_filter_chain_ptr_set(chain, p_filter_chain);
block->net = qdisc_net(q);
block->q = q;
tcf_block_offload_bind(block, q, ei);
*p_block = block;
return 0;
@ -266,15 +295,28 @@ err_chain_create:
kfree(block);
return err;
}
EXPORT_SYMBOL(tcf_block_get_ext);
int tcf_block_get(struct tcf_block **p_block,
struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q)
{
struct tcf_block_ext_info ei = {0, };
return tcf_block_get_ext(p_block, p_filter_chain, q, &ei);
}
EXPORT_SYMBOL(tcf_block_get);
void tcf_block_put(struct tcf_block *block)
void tcf_block_put_ext(struct tcf_block *block,
struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
struct tcf_block_ext_info *ei)
{
struct tcf_chain *chain, *tmp;
if (!block)
return;
tcf_block_offload_unbind(block, q, ei);
/* XXX: Standalone actions are not allowed to jump to any chain, and
* bound actions should be all removed after flushing. However,
* filters are destroyed in RCU callbacks, we have to hold the chains
@ -302,6 +344,14 @@ void tcf_block_put(struct tcf_block *block)
tcf_chain_put(chain);
kfree(block);
}
EXPORT_SYMBOL(tcf_block_put_ext);
void tcf_block_put(struct tcf_block *block)
{
struct tcf_block_ext_info ei = {0, };
tcf_block_put_ext(block, NULL, block->q, &ei);
}
EXPORT_SYMBOL(tcf_block_put);
/* Main classifier routine: scans classifier chain attached