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net: flow_offload: add flow_block_cb_alloc() and flow_block_cb_free()

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Add a new helper function to allocate flow_block_cb objects.

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 22:55:42 +02:00 committed by David S. Miller
parent 32f8c4093a
commit d63db30c85
2 changed files with 42 additions and 0 deletions
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14
include/net/flow_offload.h
View file

@ -260,6 +260,20 @@ struct flow_block_offload {
struct netlink_ext_ack *extack;
};
struct flow_block_cb {
struct list_head list;
tc_setup_cb_t *cb;
void *cb_ident;
void *cb_priv;
void (*release)(void *cb_priv);
unsigned int refcnt;
};
struct flow_block_cb *flow_block_cb_alloc(struct net *net, tc_setup_cb_t *cb,
void *cb_ident, void *cb_priv,
void (*release)(void *cb_priv));
void flow_block_cb_free(struct flow_block_cb *block_cb);
int flow_block_cb_setup_simple(struct flow_block_offload *f,
struct list_head *driver_list, tc_setup_cb_t *cb,
void *cb_ident, void *cb_priv, bool ingress_only);

28
net/core/flow_offload.c
View file

@ -166,6 +166,34 @@ void flow_rule_match_enc_opts(const struct flow_rule *rule,
}
EXPORT_SYMBOL(flow_rule_match_enc_opts);
struct flow_block_cb *flow_block_cb_alloc(struct net *net, tc_setup_cb_t *cb,
void *cb_ident, void *cb_priv,
void (*release)(void *cb_priv))
{
struct flow_block_cb *block_cb;
block_cb = kzalloc(sizeof(*block_cb), GFP_KERNEL);
if (!block_cb)
return ERR_PTR(-ENOMEM);
block_cb->cb = cb;
block_cb->cb_ident = cb_ident;
block_cb->cb_priv = cb_priv;
block_cb->release = release;
return block_cb;
}
EXPORT_SYMBOL(flow_block_cb_alloc);
void flow_block_cb_free(struct flow_block_cb *block_cb)
{
if (block_cb->release)
block_cb->release(block_cb->cb_priv);
kfree(block_cb);
}
EXPORT_SYMBOL(flow_block_cb_free);
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,