From f7dcbe2f36a660140ecb286e15f502028d96ffdf Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Wed, 20 Dec 2017 16:04:18 +0100 Subject: netfilter: move checksum_partial indirection to struct nf_ipv6_ops We cannot make a direct call to nf_ip6_checksum_partial() because that would result in autoloading the 'ipv6' module because of symbol dependencies. Therefore, define checksum_partial indirection in nf_ipv6_ops where this really belongs to. For IPv4, we can indeed make a direct function call, which is faster, given IPv4 is built-in in the networking code by default. Still, CONFIG_INET=n and CONFIG_NETFILTER=y is possible, so define empty inline stub for IPv4 in such case. Signed-off-by: Pablo Neira Ayuso --- net/netfilter/utils.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) (limited to 'net/netfilter') diff --git a/net/netfilter/utils.c b/net/netfilter/utils.c index 159a9cdcfe1e..ca6d8d62496d 100644 --- a/net/netfilter/utils.c +++ b/net/netfilter/utils.c @@ -24,3 +24,27 @@ __sum16 nf_checksum(struct sk_buff *skb, unsigned int hook, return csum; } EXPORT_SYMBOL_GPL(nf_checksum); + +__sum16 nf_checksum_partial(struct sk_buff *skb, unsigned int hook, + unsigned int dataoff, unsigned int len, + u_int8_t protocol, unsigned short family) +{ + const struct nf_ipv6_ops *v6ops; + __sum16 csum = 0; + + switch (family) { + case AF_INET: + csum = nf_ip_checksum_partial(skb, hook, dataoff, len, + protocol); + break; + case AF_INET6: + v6ops = rcu_dereference(nf_ipv6_ops); + if (v6ops) + csum = v6ops->checksum_partial(skb, hook, dataoff, len, + protocol); + break; + } + + return csum; +} +EXPORT_SYMBOL_GPL(nf_checksum_partial); -- cgit v1.2.3-70-g09d2