diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2006-11-16 02:41:18 -0800 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-12-02 21:23:41 -0800 |
| commit | f9214b2627fb8582af1986afc4aed5942086a535 (patch) | |
| tree | 13bd40def90b1bcf77e2c79a4fcabf60a4d5d444 | |
| parent | 5c78f275e696a25a9919671aa8aa3d0a3d967978 (diff) | |
[NET]: ipvs checksum annotations.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/net/ip_vs.h | 14 | ||||
| -rw-r--r-- | net/ipv4/ipvs/ip_vs_proto_tcp.c | 6 | ||||
| -rw-r--r-- | net/ipv4/ipvs/ip_vs_proto_udp.c | 6 |
3 files changed, 16 insertions, 10 deletions
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h index fedea8db156a..672564e5a81d 100644 --- a/include/net/ip_vs.h +++ b/include/net/ip_vs.h @@ -990,12 +990,18 @@ extern void ip_vs_nat_icmp(struct sk_buff *skb, struct ip_vs_protocol *pp, extern __sum16 ip_vs_checksum_complete(struct sk_buff *skb, int offset); -static inline u16 ip_vs_check_diff(u32 old, u32 new, u16 oldsum) +static inline __wsum ip_vs_check_diff4(__be32 old, __be32 new, __wsum oldsum) { - u32 diff[2] = { old, new }; + __be32 diff[2] = { ~old, new }; - return csum_fold(csum_partial((char *) diff, sizeof(diff), - oldsum ^ 0xFFFF)); + return csum_partial((char *) diff, sizeof(diff), oldsum); +} + +static inline __wsum ip_vs_check_diff2(__be16 old, __be16 new, __wsum oldsum) +{ + __be16 diff[2] = { ~old, new }; + + return csum_partial((char *) diff, sizeof(diff), oldsum); } #endif /* __KERNEL__ */ diff --git a/net/ipv4/ipvs/ip_vs_proto_tcp.c b/net/ipv4/ipvs/ip_vs_proto_tcp.c index b60a07910df7..16a9ebee2fe6 100644 --- a/net/ipv4/ipvs/ip_vs_proto_tcp.c +++ b/net/ipv4/ipvs/ip_vs_proto_tcp.c @@ -116,9 +116,9 @@ tcp_fast_csum_update(struct tcphdr *tcph, __be32 oldip, __be32 newip, __be16 oldport, __be16 newport) { tcph->check = - ip_vs_check_diff(~oldip, newip, - ip_vs_check_diff(oldport ^ htons(0xFFFF), - newport, tcph->check)); + csum_fold(ip_vs_check_diff4(oldip, newip, + ip_vs_check_diff2(oldport, newport, + ~csum_unfold(tcph->check)))); } diff --git a/net/ipv4/ipvs/ip_vs_proto_udp.c b/net/ipv4/ipvs/ip_vs_proto_udp.c index 3647397e416d..03f0a414cfa4 100644 --- a/net/ipv4/ipvs/ip_vs_proto_udp.c +++ b/net/ipv4/ipvs/ip_vs_proto_udp.c @@ -121,9 +121,9 @@ udp_fast_csum_update(struct udphdr *uhdr, __be32 oldip, __be32 newip, __be16 oldport, __be16 newport) { uhdr->check = - ip_vs_check_diff(~oldip, newip, - ip_vs_check_diff(oldport ^ htons(0xFFFF), - newport, uhdr->check)); + csum_fold(ip_vs_check_diff4(oldip, newip, + ip_vs_check_diff2(oldport, newport, + ~csum_unfold(uhdr->check)))); if (!uhdr->check) uhdr->check = CSUM_MANGLED_0; } |