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Commit 34738452 authored by Jiri Pirko's avatar Jiri Pirko Committed by David S. Miller
Browse files

net: sched: cls_flower: propagate chain teplate creation and destruction to drivers 



Introduce a couple of flower offload commands in order to propagate
template creation/destruction events down to device drivers.
Drivers may use this information to prepare HW in an optimal way
for future filter insertions.

Signed-off-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b95ec7eb

include/net/pkt_cls.h

+2 −0
Original line number Diff line number Diff line
@@ -721,6 +721,8 @@ enum tc_fl_command { 
	TC_CLSFLOWER_REPLACE,

	TC_CLSFLOWER_DESTROY,

	TC_CLSFLOWER_STATS,

	TC_CLSFLOWER_TMPLT_CREATE,

	TC_CLSFLOWER_TMPLT_DESTROY,

};



struct tc_cls_flower_offload {

net/sched/cls_flower.c

+39 −0
Original line number Diff line number Diff line
@@ -1194,6 +1194,42 @@ static int fl_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb, 
	return 0;

}



static void fl_hw_create_tmplt(struct tcf_chain *chain,

			       struct fl_flow_tmplt *tmplt)

{

	struct tc_cls_flower_offload cls_flower = {};

	struct tcf_block *block = chain->block;

	struct tcf_exts dummy_exts = { 0, };



	cls_flower.common.chain_index = chain->index;

	cls_flower.command = TC_CLSFLOWER_TMPLT_CREATE;

	cls_flower.cookie = (unsigned long) tmplt;

	cls_flower.dissector = &tmplt->dissector;

	cls_flower.mask = &tmplt->mask;

	cls_flower.key = &tmplt->dummy_key;

	cls_flower.exts = &dummy_exts;



	/* We don't care if driver (any of them) fails to handle this

	 * call. It serves just as a hint for it.

	 */

	tc_setup_cb_call(block, NULL, TC_SETUP_CLSFLOWER,

			 &cls_flower, false);

}



static void fl_hw_destroy_tmplt(struct tcf_chain *chain,

				struct fl_flow_tmplt *tmplt)

{

	struct tc_cls_flower_offload cls_flower = {};

	struct tcf_block *block = chain->block;



	cls_flower.common.chain_index = chain->index;

	cls_flower.command = TC_CLSFLOWER_TMPLT_DESTROY;

	cls_flower.cookie = (unsigned long) tmplt;



	tc_setup_cb_call(block, NULL, TC_SETUP_CLSFLOWER,

			 &cls_flower, false);

}



static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain,

			     struct nlattr **tca,

			     struct netlink_ext_ack *extack)
@@ -1224,6 +1260,8 @@ static void *fl_tmplt_create(struct net *net, struct tcf_chain *chain, 


	fl_init_dissector(&tmplt->dissector, &tmplt->mask);



	fl_hw_create_tmplt(chain, tmplt);



	return tmplt;



errout_tmplt:
@@ -1237,6 +1275,7 @@ static void fl_tmplt_destroy(void *tmplt_priv) 
{

	struct fl_flow_tmplt *tmplt = tmplt_priv;



	fl_hw_destroy_tmplt(tmplt->chain, tmplt);

	kfree(tmplt);

}