diff options
| author | Tom Herbert <therbert@google.com> | 2014-09-01 02:12:43 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-09-02 08:36:28 +0400 |
| commit | 2abb7cdc0dc84e99b76ef983a1ae1978922aa9b3 (patch) | |
| tree | 9bf6029678d74ef6ad12e832d48d769caf88a4ed /include | |
| parent | d96535a17dbbafd567961d14c08c0984ddda9c3c (diff) | |
| download | linux-2abb7cdc0dc84e99b76ef983a1ae1978922aa9b3.tar.xz | |
udp: Add support for doing checksum unnecessary conversion
Add support for doing CHECKSUM_UNNECESSARY to CHECKSUM_COMPLETE
conversion in UDP tunneling path.
In the normal UDP path, we call skb_checksum_try_convert after locating
the UDP socket. The check is that checksum conversion is enabled for
the socket (new flag in UDP socket) and that checksum field is
non-zero.
In the UDP GRO path, we call skb_gro_checksum_try_convert after
checksum is validated and checksum field is non-zero. Since this is
already in GRO we assume that checksum conversion is always wanted.
Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/udp.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/include/linux/udp.h b/include/linux/udp.h index 247cfdcc4b08..ee3277593222 100644 --- a/include/linux/udp.h +++ b/include/linux/udp.h @@ -49,7 +49,11 @@ struct udp_sock { unsigned int corkflag; /* Cork is required */ __u8 encap_type; /* Is this an Encapsulation socket? */ unsigned char no_check6_tx:1,/* Send zero UDP6 checksums on TX? */ - no_check6_rx:1;/* Allow zero UDP6 checksums on RX? */ + no_check6_rx:1,/* Allow zero UDP6 checksums on RX? */ + convert_csum:1;/* On receive, convert checksum + * unnecessary to checksum complete + * if possible. + */ /* * Following member retains the information to create a UDP header * when the socket is uncorked. @@ -98,6 +102,16 @@ static inline bool udp_get_no_check6_rx(struct sock *sk) return udp_sk(sk)->no_check6_rx; } +static inline void udp_set_convert_csum(struct sock *sk, bool val) +{ + udp_sk(sk)->convert_csum = val; +} + +static inline bool udp_get_convert_csum(struct sock *sk) +{ + return udp_sk(sk)->convert_csum; +} + #define udp_portaddr_for_each_entry(__sk, node, list) \ hlist_nulls_for_each_entry(__sk, node, list, __sk_common.skc_portaddr_node) |