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net: sched: cls_flower: implement offload tcf_proto_op

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Add the reoffload tcf_proto_op in flower 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.

A filter contains a flag to indicate if it is in hardware or not. To
ensure the reoffload function properly maintains this flag, keep a
reference counter for the number of instances of the filter that are in
hardware. Only update the flag when this counter changes from or to 0. Add
a generic helper function to implement this behaviour.

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 14:30:06 -07:00
committed by David S. Miller
parent e56185c78b
commit 31533cba43
2 changed files with 59 additions and 0 deletions
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15
include/net/sch_generic.h
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@@ -336,6 +336,21 @@ static inline void tcf_block_offload_dec(struct tcf_block *block, u32 *flags)
block->offloadcnt--;
}
static inline void
tc_cls_offload_cnt_update(struct tcf_block *block, unsigned int *cnt,
u32 *flags, bool add)
{
if (add) {
if (!*cnt)
tcf_block_offload_inc(block, flags);
(*cnt)++;
} else {
(*cnt)--;
if (!*cnt)
tcf_block_offload_dec(block, flags);
}
}
static inline void qdisc_cb_private_validate(const struct sk_buff *skb, int sz)
{
struct qdisc_skb_cb *qcb;