inet: Sanitize inet{,6} protocol demux.
Don't pretend that inet_protos[] and inet6_protos[] are hashes, thay
are just a straight arrays. Remove all unnecessary hash masking.
Document MAX_INET_PROTOS.
Use RAW_HTABLE_SIZE when appropriate.
Reported-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/protocol.c b/net/ipv6/protocol.c
index 9a7978f..053082d 100644
--- a/net/ipv6/protocol.c
+++ b/net/ipv6/protocol.c
@@ -29,9 +29,7 @@
int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char protocol)
{
- int hash = protocol & (MAX_INET_PROTOS - 1);
-
- return !cmpxchg((const struct inet6_protocol **)&inet6_protos[hash],
+ return !cmpxchg((const struct inet6_protocol **)&inet6_protos[protocol],
NULL, prot) ? 0 : -1;
}
EXPORT_SYMBOL(inet6_add_protocol);
@@ -42,9 +40,9 @@
int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char protocol)
{
- int ret, hash = protocol & (MAX_INET_PROTOS - 1);
+ int ret;
- ret = (cmpxchg((const struct inet6_protocol **)&inet6_protos[hash],
+ ret = (cmpxchg((const struct inet6_protocol **)&inet6_protos[protocol],
prot, NULL) == prot) ? 0 : -1;
synchronize_net();
