From de27d001d187721de775ed9e0c485aa6f517c745 Mon Sep 17 00:00:00 2001 From: Vlad Yasevich Date: Thu, 15 Nov 2012 08:49:12 +0000 Subject: net: Add net protocol offload registration infrustructure Create a new data structure for IPv4 protocols that holds GRO/GSO callbacks and a new array to track the protocols that register GRO/GSO. Signed-off-by: Vlad Yasevich Signed-off-by: David S. Miller --- net/ipv4/protocol.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'net/ipv4/protocol.c') diff --git a/net/ipv4/protocol.c b/net/ipv4/protocol.c index 8918eff1426d..0f9d09f54bd9 100644 --- a/net/ipv4/protocol.c +++ b/net/ipv4/protocol.c @@ -29,6 +29,7 @@ #include const struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS] __read_mostly; +const struct net_offload __rcu *inet_offloads[MAX_INET_PROTOS] __read_mostly; /* * Add a protocol handler to the hash tables @@ -41,6 +42,13 @@ int inet_add_protocol(const struct net_protocol *prot, unsigned char protocol) } EXPORT_SYMBOL(inet_add_protocol); +int inet_add_offload(const struct net_offload *prot, unsigned char protocol) +{ + return !cmpxchg((const struct net_offload **)&inet_offloads[protocol], + NULL, prot) ? 0 : -1; +} +EXPORT_SYMBOL(inet_add_offload); + /* * Remove a protocol from the hash tables. */ @@ -57,3 +65,16 @@ int inet_del_protocol(const struct net_protocol *prot, unsigned char protocol) return ret; } EXPORT_SYMBOL(inet_del_protocol); + +int inet_del_offload(const struct net_offload *prot, unsigned char protocol) +{ + int ret; + + ret = (cmpxchg((const struct net_offload **)&inet_offloads[protocol], + prot, NULL) == prot) ? 0 : -1; + + synchronize_net(); + + return ret; +} +EXPORT_SYMBOL(inet_del_offload); -- cgit v1.2.3-55-g7522