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netfilter: nf_tables_offload: remove rules on unregistered device only 

After unbinding the list of flow_block callbacks, iterate over it to
remove the existing rules in the netdevice that has just been
unregistered.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Pablo Neira Ayuso 2019-10-16 14:30:02 +02:00
parent c5d275276f
commit bbaef955af
1 changed files with 13 additions and 13 deletions
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26
net/netfilter/nf_tables_offload.c
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@ -206,6 +206,16 @@ static int nft_flow_offload_unbind(struct flow_block_offload *bo,
struct nft_base_chain *basechain)
{
struct flow_block_cb *block_cb, *next;
struct flow_cls_offload cls_flow;
struct nft_chain *chain;
struct nft_rule *rule;
chain = &basechain->chain;
list_for_each_entry(rule, &chain->rules, list) {
nft_flow_cls_offload_setup(&cls_flow, basechain, rule, NULL,
FLOW_CLS_DESTROY);
nft_setup_cb_call(TC_SETUP_CLSFLOWER, &cls_flow, &bo->cb_list);
}
list_for_each_entry_safe(block_cb, next, &bo->cb_list, list) {
list_del(&block_cb->list);
@ -445,18 +455,6 @@ static void nft_indr_block_cb(struct net_device *dev,
mutex_unlock(&net->nft.commit_mutex);
}
static void nft_offload_chain_clean(struct nft_chain *chain)
{
struct nft_rule *rule;
list_for_each_entry(rule, &chain->rules, list) {
nft_flow_offload_rule(chain, rule,
NULL, FLOW_CLS_DESTROY);
}
nft_flow_offload_chain(chain, NULL, FLOW_BLOCK_UNBIND);
}
static int nft_offload_netdev_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
@ -467,7 +465,9 @@ static int nft_offload_netdev_event(struct notifier_block *this,
mutex_lock(&net->nft.commit_mutex);
chain = __nft_offload_get_chain(dev);
if (chain)
nft_offload_chain_clean(chain);
nft_flow_block_chain(nft_base_chain(chain), dev,
FLOW_BLOCK_UNBIND);
mutex_unlock(&net->nft.commit_mutex);
return NOTIFY_DONE;