From: Jiri Pirko <jiri@mellanox.com>
Date: Mon, 23 Jul 2018 09:23:11 +0200
Subject: net: sched: cls_flower: propagate chain teplate creation and
destruction to drivers
Patch-mainline: v4.19-rc1
Git-commit: 34738452739069947e528123810533f28dd8332b
References: bsc#1109837
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: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
include/net/pkt_cls.h | 2 ++
net/sched/cls_flower.c | 39 +++++++++++++++++++++++++++++++++++++++
2 files changed, 41 insertions(+)
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -720,6 +720,8 @@ 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 {
--- a/net/sched/cls_flower.c
+++ b/net/sched/cls_flower.c
@@ -1194,6 +1194,42 @@ static int fl_reoffload(struct tcf_proto
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
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
{
struct fl_flow_tmplt *tmplt = tmplt_priv;
+ fl_hw_destroy_tmplt(tmplt->chain, tmplt);
kfree(tmplt);
}