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| author |   David S. Miller <davem@davemloft.net> | 2012-06-19 18:56:21 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-06-19 18:56:21 -0700 |
| commit | f9242b6b28d61295f2bf7e8adfb1060b382e5381 (patch) | |
| tree | b395670bd6ae832e9f6f87f47a1840baf3a06d0d /net/ipv4/protocol.c | |
| parent | net: qmi_wwan: use module_usb_driver macro (diff) | |
| download | linux-dev-f9242b6b28d61295f2bf7e8adfb1060b382e5381.tar.xz linux-dev-f9242b6b28d61295f2bf7e8adfb1060b382e5381.zip | |
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.c | 8 |
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(); |