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net: flow_offload: add flow_block_cb_{priv, incref, decref}()

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This patch completes the flow block API to introduce:

* flow_block_cb_priv() to access callback private data.
* flow_block_cb_incref() to bump reference counter on this flow block.
* flow_block_cb_decref() to decrement the reference counter.

These functions are taken from the existing tcf_block_cb_priv(),
tcf_block_cb_incref() and tcf_block_cb_decref().

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pablo Neira Ayuso 2019-07-09 22:55:44 +02:00 committed by David S. Miller
parent da3eeb904f
commit 67bd0d5ea7
2 changed files with 22 additions and 0 deletions
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4
include/net/flow_offload.h
View File

@ -281,6 +281,10 @@ void flow_block_cb_free(struct flow_block_cb *block_cb);
struct flow_block_cb *flow_block_cb_lookup(struct flow_block_offload *offload,
tc_setup_cb_t *cb, void *cb_ident);
void *flow_block_cb_priv(struct flow_block_cb *block_cb);
void flow_block_cb_incref(struct flow_block_cb *block_cb);
unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb);
static inline void flow_block_cb_add(struct flow_block_cb *block_cb,
struct flow_block_offload *offload)
{

18
net/core/flow_offload.c
View File

@ -211,6 +211,24 @@ struct flow_block_cb *flow_block_cb_lookup(struct flow_block_offload *f,
}
EXPORT_SYMBOL(flow_block_cb_lookup);
void *flow_block_cb_priv(struct flow_block_cb *block_cb)
{
return block_cb->cb_priv;
}
EXPORT_SYMBOL(flow_block_cb_priv);
void flow_block_cb_incref(struct flow_block_cb *block_cb)
{
block_cb->refcnt++;
}
EXPORT_SYMBOL(flow_block_cb_incref);
unsigned int flow_block_cb_decref(struct flow_block_cb *block_cb)
{
return --block_cb->refcnt;
}
EXPORT_SYMBOL(flow_block_cb_decref);
int flow_block_cb_setup_simple(struct flow_block_offload *f,
struct list_head *driver_block_list,
tc_setup_cb_t *cb, void *cb_ident, void *cb_priv,