diff options
| author | Tom Herbert <tom@herbertland.com> | 2016-06-07 16:09:44 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-06-08 00:40:34 -0700 |
| commit | 707a2ca4870fcf6b5480cdfad563b940f56f0844 (patch) | |
| tree | 1f3246877173faadbb4589af7995d2224acab189 /net/ipv6/ila/ila_common.c | |
| parent | e00431bc93bb48c650273be4a00007b2a392d32a (diff) | |
ila: Perform only one translation in forwarding path
When setting up ILA in a router we noticed that the the encapsulation
is invoked twice: once in the route input path and again upon route
output. To resolve this we add a flag set_csum_neutral for the
ila_update_ipv6_locator. If this flag is set and the checksum
neutral bit is also set we assume that checksum-neutral translation
has already been performed and take no further action. The
flag is set only in ila_output path. The flag is not set for ila_input and
ila_xlat.
Tested:
Used 3 netns to set to emulate a router and two hosts. The router
translates SIR addresses between the two destinations in other two netns.
Verified ping and netperf are functional.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ila/ila_common.c')
| -rw-r--r-- | net/ipv6/ila/ila_common.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/net/ipv6/ila/ila_common.c b/net/ipv6/ila/ila_common.c index 0e94042d1289..b3d00be484d4 100644 --- a/net/ipv6/ila/ila_common.c +++ b/net/ipv6/ila/ila_common.c @@ -103,7 +103,8 @@ static void ila_csum_adjust_transport(struct sk_buff *skb, iaddr->loc = p->locator; } -void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p) +void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p, + bool set_csum_neutral) { struct ipv6hdr *ip6h = ipv6_hdr(skb); struct ila_addr *iaddr = ila_a2i(&ip6h->daddr); @@ -114,7 +115,8 @@ void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p) * is a locator being translated to a SIR address. * Perform (receiver) checksum-neutral translation. */ - ila_csum_do_neutral(iaddr, p); + if (!set_csum_neutral) + ila_csum_do_neutral(iaddr, p); } else { switch (p->csum_mode) { case ILA_CSUM_ADJUST_TRANSPORT: |