diff options
| author | Tom Herbert <tom@herbertland.com> | 2016-04-23 11:46:57 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-04-26 01:27:07 -0400 |
| commit | 90bfe662db13d49cadc6714b0b8ed7e2d0535c5c (patch) | |
| tree | 1f7d7cab0c43d934ddcfa5bb008144c1f6dabf31 /net/ipv6/ila/ila.h | |
| parent | 642c2c95585dac4ea977140dbb1149fd1e2e7f7f (diff) | |
ila: add checksum neutral ILA translations
Support checksum neutral ILA as described in the ILA draft. The low
order 16 bits of the identifier are used to contain the checksum
adjustment value.
The csum-mode parameter is added to described checksum processing. There
are three values:
- adjust transport checksum (previous behavior)
- do checksum neutral mapping
- do nothing
On output the csum-mode in the ila_params is checked and acted on. If
mode is checksum neutral mapping then to mapping and set C-bit.
On input, C-bit is checked. If it is set checksum-netural mapping is
done (regardless of csum-mode in ila params) and C-bit will be cleared.
If it is not set then action in csum-mode is taken.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ila/ila.h')
| -rw-r--r-- | net/ipv6/ila/ila.h | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/net/ipv6/ila/ila.h b/net/ipv6/ila/ila.h index f532967d9ed7..d08fd2d48a78 100644 --- a/net/ipv6/ila/ila.h +++ b/net/ipv6/ila/ila.h @@ -36,11 +36,13 @@ struct ila_identifier { union { struct { #if defined(__LITTLE_ENDIAN_BITFIELD) - u8 __space:5; + u8 __space:4; + u8 csum_neutral:1; u8 type:3; #elif defined(__BIG_ENDIAN_BITFIELD) u8 type:3; - u8 __space:5; + u8 csum_neutral:1; + u8 __space:4; #else #error "Adjust your <asm/byteorder.h> defines" #endif @@ -64,6 +66,8 @@ enum { ILA_ATYPE_RSVD_3, }; +#define CSUM_NEUTRAL_FLAG htonl(0x10000000) + struct ila_addr { union { struct in6_addr addr; @@ -88,6 +92,7 @@ struct ila_params { struct ila_locator locator; struct ila_locator locator_match; __wsum csum_diff; + u8 csum_mode; }; static inline __wsum compute_csum_diff8(const __be32 *from, const __be32 *to) @@ -99,8 +104,15 @@ static inline __wsum compute_csum_diff8(const __be32 *from, const __be32 *to) return csum_partial(diff, sizeof(diff), 0); } +static inline bool ila_csum_neutral_set(struct ila_identifier ident) +{ + return !!(ident.csum_neutral); +} + void ila_update_ipv6_locator(struct sk_buff *skb, struct ila_params *p); +void ila_init_saved_csum(struct ila_params *p); + int ila_lwt_init(void); void ila_lwt_fini(void); int ila_xlat_init(void); |