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net: sched: cls_matchall: implement offload tcf_proto_op

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Add the reoffload tcf_proto_op in matchall to generate an offload message
for each filter in the given tcf_proto. Call the specified callback with
this new offload message. The function only returns an error if the
callback rejects adding a 'hardware only' rule.

Ensure matchall flags correctly report if the rule is in hw by keeping a
reference counter for the number of instances of the rule offloaded. Only
update the flag when this counter changes from or to 0.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
John Hurley 2018-06-25 14:30:07 -07:00 committed by David S. Miller
parent 31533cba43
commit 0efd1b3a13
1 changed files with 32 additions and 0 deletions
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32
net/sched/cls_matchall.c
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@ -21,6 +21,7 @@ struct cls_mall_head {
struct tcf_result res; struct tcf_result res;
u32 handle; u32 handle;
u32 flags; u32 flags;
unsigned int in_hw_count;
struct rcu_work rwork; struct rcu_work rwork;
}; };
@ -95,6 +96,7 @@ static int mall_replace_hw_filter(struct tcf_proto *tp,
mall_destroy_hw_filter(tp, head, cookie, NULL); mall_destroy_hw_filter(tp, head, cookie, NULL);
return err; return err;
} else if (err > 0) { } else if (err > 0) {
head->in_hw_count = err;
tcf_block_offload_inc(block, &head->flags); tcf_block_offload_inc(block, &head->flags);
} }
@ -235,6 +237,35 @@ skip:
arg->count++; arg->count++;
} }
static int mall_reoffload(struct tcf_proto *tp, bool add, tc_setup_cb_t *cb,
void *cb_priv, struct netlink_ext_ack *extack)
{
struct cls_mall_head *head = rtnl_dereference(tp->root);
struct tc_cls_matchall_offload cls_mall = {};
struct tcf_block *block = tp->chain->block;
int err;
if (tc_skip_hw(head->flags))
return 0;
tc_cls_common_offload_init(&cls_mall.common, tp, head->flags, extack);
cls_mall.command = add ?
TC_CLSMATCHALL_REPLACE : TC_CLSMATCHALL_DESTROY;
cls_mall.exts = &head->exts;
cls_mall.cookie = (unsigned long)head;
err = cb(TC_SETUP_CLSMATCHALL, &cls_mall, cb_priv);
if (err) {
if (add && tc_skip_sw(head->flags))
return err;
return 0;
}
tc_cls_offload_cnt_update(block, &head->in_hw_count, &head->flags, add);
return 0;
}
static int mall_dump(struct net *net, struct tcf_proto *tp, void *fh, static int mall_dump(struct net *net, struct tcf_proto *tp, void *fh,
struct sk_buff *skb, struct tcmsg *t) struct sk_buff *skb, struct tcmsg *t)
{ {
@ -289,6 +320,7 @@ static struct tcf_proto_ops cls_mall_ops __read_mostly = {
.change = mall_change, .change = mall_change,
.delete = mall_delete, .delete = mall_delete,
.walk = mall_walk, .walk = mall_walk,
.reoffload = mall_reoffload,
.dump = mall_dump, .dump = mall_dump,
.bind_class = mall_bind_class, .bind_class = mall_bind_class,
.owner = THIS_MODULE, .owner = THIS_MODULE,