diff options
| author | Tom Herbert <tom@quantonium.net> | 2017-11-05 15:58:22 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-11-08 11:20:48 +0900 |
| commit | 80661e7687f202514ee5eea0e74916d3c50c2606 (patch) | |
| tree | e8d48b073ed8d7a29ad9bc2ea2d22e5e3c591afc /net/ipv6/ila | |
| parent | 3e29cd0e6563d5fefd59e7225750ee9922f2dad5 (diff) | |
ila: cleanup checksum diff
Consolidate computing checksum diff into one function.
Add get_csum_diff_iaddr that computes the checksum diff between
an address argument and locator being written. get_csum_diff
calls this using the destination address in the IP header as
the argument.
Also moved ila_init_saved_csum to be close to the checksum
diff functions.
Signed-off-by: Tom Herbert <tom@quantonium.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ila')
| -rw-r--r-- | net/ipv6/ila/ila_common.c | 39 |
1 files changed, 18 insertions, 21 deletions
diff --git a/net/ipv6/ila/ila_common.c b/net/ipv6/ila/ila_common.c index aba0998ddbfb..f1d9248d8b86 100644 --- a/net/ipv6/ila/ila_common.c +++ b/net/ipv6/ila/ila_common.c @@ -13,15 +13,28 @@ #include <uapi/linux/ila.h> #include "ila.h" -static __wsum get_csum_diff(struct ipv6hdr *ip6h, struct ila_params *p) +void ila_init_saved_csum(struct ila_params *p) { - struct ila_addr *iaddr = ila_a2i(&ip6h->daddr); + if (!p->locator_match.v64) + return; + + p->csum_diff = compute_csum_diff8( + (__be32 *)&p->locator, + (__be32 *)&p->locator_match); +} +static __wsum get_csum_diff_iaddr(struct ila_addr *iaddr, struct ila_params *p) +{ if (p->locator_match.v64) return p->csum_diff; else - return compute_csum_diff8((__be32 *)&iaddr->loc, - (__be32 *)&p->locator); + return compute_csum_diff8((__be32 *)&p->locator, + (__be32 *)&iaddr->loc); +} + +static __wsum get_csum_diff(struct ipv6hdr *ip6h, struct ila_params *p) +{ + return get_csum_diff_iaddr(ila_a2i(&ip6h->daddr), p); } static void ila_csum_do_neutral(struct ila_addr *iaddr, @@ -30,13 +43,7 @@ static void ila_csum_do_neutral(struct ila_addr *iaddr, __sum16 *adjust = (__force __sum16 *)&iaddr->ident.v16[3]; __wsum diff, fval; - /* Check if checksum adjust value has been cached */ - if (p->locator_match.v64) { - diff = p->csum_diff; - } else { - diff = compute_csum_diff8((__be32 *)&p->locator, - (__be32 *)iaddr); - } + diff = get_csum_diff_iaddr(iaddr, p); fval = (__force __wsum)(ila_csum_neutral_set(iaddr->ident) ? CSUM_NEUTRAL_FLAG : ~CSUM_NEUTRAL_FLAG); @@ -134,16 +141,6 @@ void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p, iaddr->loc = p->locator; } -void ila_init_saved_csum(struct ila_params *p) -{ - if (!p->locator_match.v64) - return; - - p->csum_diff = compute_csum_diff8( - (__be32 *)&p->locator, - (__be32 *)&p->locator_match); -} - static int __init ila_init(void) { int ret; |