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| author | Julian Anastasov <ja@ssi.bg> | 2010-10-17 16:17:20 +0300 |
|---|---|---|
| committer | Simon Horman <horms@verge.net.au> | 2010-10-21 10:50:02 +0200 |
| commit | 8b27b10f5863a5b63e46304a71aa01463d1efac4 (patch) | |
| tree | 89f5db8881b0297cda00cad3c2cdedf685e2757f /include | |
| parent | 5bc9068e9d962ca6b8bec3f0eb6f60ab4dee1d04 (diff) | |
| download | linux-8b27b10f5863a5b63e46304a71aa01463d1efac4.tar.gz linux-8b27b10f5863a5b63e46304a71aa01463d1efac4.tar.bz2 linux-8b27b10f5863a5b63e46304a71aa01463d1efac4.zip | |
ipvs: optimize checksums for apps
Avoid full checksum calculation for apps that can provide
info whether csum was broken after payload mangling. For now only
ip_vs_ftp mangles payload and it updates the csum, so the full
recalculation is avoided for all packets.
Add CHECKSUM_UNNECESSARY for snat_handler (TCP and UDP).
It is needed to support SNAT from local address for the case
when csum is fully recalculated.
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/ip_vs.h | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h index 6e8a6192e574..adcdba9dd183 100644 --- a/include/net/ip_vs.h +++ b/include/net/ip_vs.h @@ -597,11 +597,19 @@ struct ip_vs_app { __be16 port; /* port number in net order */ atomic_t usecnt; /* usage counter */ - /* output hook: return false if can't linearize. diff set for TCP. */ + /* + * output hook: Process packet in inout direction, diff set for TCP. + * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, + * 2=Mangled but checksum was not updated + */ int (*pkt_out)(struct ip_vs_app *, struct ip_vs_conn *, struct sk_buff *, int *diff); - /* input hook: return false if can't linearize. diff set for TCP. */ + /* + * input hook: Process packet in outin direction, diff set for TCP. + * Return: 0=Error, 1=Payload Not Mangled/Mangled but checksum is ok, + * 2=Mangled but checksum was not updated + */ int (*pkt_in)(struct ip_vs_app *, struct ip_vs_conn *, struct sk_buff *, int *diff); |