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ip: Move checksum convert defines to inet

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Move convert_csum from udp_sock to inet_sock. This allows the
possibility that we can use convert checksum for different types
of sockets and also allows convert checksum to be enabled from
inet layer (what we'll want to do when enabling IP_CHECKSUM cmsg).

Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Tom Herbert 2015-01-05 13:56:14 -08:00 committed by David S. Miller
parent 149118d893
commit 224d019c4f
6 changed files with 22 additions and 19 deletions
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16
include/linux/udp.h
View file

@ -49,11 +49,7 @@ 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? */
convert_csum:1;/* On receive, convert checksum
* unnecessary to checksum complete
* if possible.
*/
no_check6_rx:1;/* Allow zero UDP6 checksums on RX? */
/*
* Following member retains the information to create a UDP header
* when the socket is uncorked.
@ -102,16 +98,6 @@ 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)

17
include/net/inet_sock.h
View file

@ -184,6 +184,7 @@ struct inet_sock {
mc_all:1,
nodefrag:1;
__u8 rcv_tos;
__u8 convert_csum;
int uc_index;
int mc_index;
__be32 mc_addr;
@ -250,4 +251,20 @@ static inline __u8 inet_sk_flowi_flags(const struct sock *sk)
return flags;
}
static inline void inet_inc_convert_csum(struct sock *sk)
{
inet_sk(sk)->convert_csum++;
}
static inline void inet_dec_convert_csum(struct sock *sk)
{
if (inet_sk(sk)->convert_csum > 0)
inet_sk(sk)->convert_csum--;
}
static inline bool inet_get_convert_csum(struct sock *sk)
{
return !!inet_sk(sk)->convert_csum;
}
#endif /* _INET_SOCK_H */

2
net/ipv4/fou.c
View file

@ -490,7 +490,7 @@ static int fou_create(struct net *net, struct fou_cfg *cfg,
sk->sk_user_data = fou;
fou->sock = sock;
udp_set_convert_csum(sk, true);
inet_inc_convert_csum(sk);
sk->sk_allocation = GFP_ATOMIC;

2
net/ipv4/udp.c
View file

@ -1806,7 +1806,7 @@ int __udp4_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
if (sk != NULL) {
int ret;
if (udp_sk(sk)->convert_csum && uh->check && !IS_UDPLITE(sk))
if (inet_get_convert_csum(sk) && uh->check && !IS_UDPLITE(sk))
skb_checksum_try_convert(skb, IPPROTO_UDP, uh->check,
inet_compute_pseudo);

2
net/ipv4/udp_tunnel.c
View file

@ -63,7 +63,7 @@ void setup_udp_tunnel_sock(struct net *net, struct socket *sock,
inet_sk(sk)->mc_loop = 0;
/* Enable CHECKSUM_UNNECESSARY to CHECKSUM_COMPLETE conversion */
udp_set_convert_csum(sk, true);
inet_inc_convert_csum(sk);
rcu_assign_sk_user_data(sk, cfg->sk_user_data);

2
net/ipv6/udp.c
View file

@ -909,7 +909,7 @@ int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
goto csum_error;
}
if (udp_sk(sk)->convert_csum && uh->check && !IS_UDPLITE(sk))
if (inet_get_convert_csum(sk) && uh->check && !IS_UDPLITE(sk))
skb_checksum_try_convert(skb, IPPROTO_UDP, uh->check,
ip6_compute_pseudo);