diff options
author | Pablo Neira Ayuso <pablo@netfilter.org> | 2015-06-15 12:12:01 +0200 |
---|---|---|
committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2015-06-15 23:02:35 +0200 |
commit | 835b803377f5f11f9ccf234f70ed667a82605c45 (patch) | |
tree | c37020898a8d31211877daef0fc7609bc118c878 /net/netfilter/nf_tables_api.c | |
parent | d8ee8f7c56b267751f95a1f0b4a75618909c07ac (diff) |
netfilter: nf_tables_netdev: unregister hooks on net_device removal
In case the net_device is gone, we have to unregister the hooks and put back
the reference on the net_device object. Once it comes back, register them
again. This also covers the device rename case.
This patch also adds a new flag to indicate that the basechain is disabled, so
their hooks are not registered. This flag is used by the netdev family to
handle the case where the net_device object is gone. Currently this flag is not
exposed to userspace.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nf_tables_api.c')
-rw-r--r-- | net/netfilter/nf_tables_api.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index c66dc62afb46..cfe636808541 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -127,17 +127,25 @@ static void nft_trans_destroy(struct nft_trans *trans) kfree(trans); } -static int nft_register_basechain(struct nft_base_chain *basechain, - unsigned int hook_nops) +int nft_register_basechain(struct nft_base_chain *basechain, + unsigned int hook_nops) { + if (basechain->flags & NFT_BASECHAIN_DISABLED) + return 0; + return nf_register_hooks(basechain->ops, hook_nops); } +EXPORT_SYMBOL_GPL(nft_register_basechain); -static void nft_unregister_basechain(struct nft_base_chain *basechain, - unsigned int hook_nops) +void nft_unregister_basechain(struct nft_base_chain *basechain, + unsigned int hook_nops) { + if (basechain->flags & NFT_BASECHAIN_DISABLED) + return; + nf_unregister_hooks(basechain->ops, hook_nops); } +EXPORT_SYMBOL_GPL(nft_unregister_basechain); static int nf_tables_register_hooks(const struct nft_table *table, struct nft_chain *chain, |