[PATCH net-next 01/10] net: Add sk_lookup struct and helper
From: David Ahern <hidden>
Date: 2017-08-01 03:13:38
Subsystem:
networking [general], networking [sockets], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Kuniyuki Iwashima, Willem de Bruijn, Linus Torvalds
Consolidate the socket lookup args into a struct. Add helper that compares sk_bound_dev_if for a socket to the lookup parameters. Signed-off-by: David Ahern <redacted> --- include/net/sock.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+)
diff --git a/include/net/sock.h b/include/net/sock.h
index 7c0632c7e870..a2db5fd30192 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h@@ -491,6 +491,44 @@ enum sk_pacing { #define rcu_dereference_sk_user_data(sk) rcu_dereference(__sk_user_data((sk))) #define rcu_assign_sk_user_data(sk, ptr) rcu_assign_pointer(__sk_user_data((sk)), ptr) +/* used for socket lookups */ +struct sk_lookup { + union { + const struct in6_addr *ipv6; + __be32 ipv4; + } saddr; + union { + const struct in6_addr *ipv6; + __be32 ipv4; + } daddr; + + __be16 sport; + __be16 dport; + unsigned short hnum; + + int dif; + bool exact_dif; +}; + +/* Compare sk_bound_dev_if to socket lookup dif + * Returns: + * -1 exact dif required and not met + * 0 sk_bound_dev_if is either not set or does not match + * 1 sk_bound_dev_if is set and matches dif + */ +static inline int sk_lookup_device_cmp(const struct sock *sk, + const struct sk_lookup *params) +{ + /* exact_dif true == l3mdev case */ + if (params->exact_dif && sk->sk_bound_dev_if != params->dif) + return -1; + + if (sk->sk_bound_dev_if && sk->sk_bound_dev_if == params->dif) + return 1; + + return 0; +} + /* * SK_CAN_REUSE and SK_NO_REUSE on a socket mean that the socket is OK * or not whether his port will be reused by someone else. SK_FORCE_REUSE
--
2.1.4