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authorDavid S. Miller <davem@davemloft.net>2012-06-20 05:56:21 +0400
committerDavid S. Miller <davem@davemloft.net>2012-06-20 05:56:21 +0400
commitf9242b6b28d61295f2bf7e8adfb1060b382e5381 (patch)
treeb395670bd6ae832e9f6f87f47a1840baf3a06d0d /net/ipv4/protocol.c
parent677a3d60fb3153f786a0d28fcf0287670e7bd3c2 (diff)
downloadlinux-f9242b6b28d61295f2bf7e8adfb1060b382e5381.tar.xz
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>
Diffstat (limited to 'net/ipv4/protocol.c')
-rw-r--r--net/ipv4/protocol.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/net/ipv4/protocol.c b/net/ipv4/protocol.c
index 9ae5c01cd0b2..8918eff1426d 100644
--- a/net/ipv4/protocol.c
+++ b/net/ipv4/protocol.c
@@ -36,9 +36,7 @@ const struct net_protocol __rcu *inet_protos[MAX_INET_PROTOS] __read_mostly;
int inet_add_protocol(const struct net_protocol *prot, unsigned char protocol)
{
- int hash = protocol & (MAX_INET_PROTOS - 1);
-
- return !cmpxchg((const struct net_protocol **)&inet_protos[hash],
+ return !cmpxchg((const struct net_protocol **)&inet_protos[protocol],
NULL, prot) ? 0 : -1;
}
EXPORT_SYMBOL(inet_add_protocol);
@@ -49,9 +47,9 @@ EXPORT_SYMBOL(inet_add_protocol);
int inet_del_protocol(const struct net_protocol *prot, unsigned char protocol)
{
- int ret, hash = protocol & (MAX_INET_PROTOS - 1);
+ int ret;
- ret = (cmpxchg((const struct net_protocol **)&inet_protos[hash],
+ ret = (cmpxchg((const struct net_protocol **)&inet_protos[protocol],
prot, NULL) == prot) ? 0 : -1;
synchronize_net();