[PATCH v4 net-next 3/7] udp: Add socket lookup functions with noref
From: Tom Herbert <hidden>
Date: 2016-10-19 23:03:27
Subsystem:
networking [general], the rest, user datagram protocol (udp) · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Willem de Bruijn
Create udp4_lib_lookup_noref and udp6_lib_lookup_noref. These perfrom a socket lookup on addresses and ports without taking a reference. Signed-off-by: Tom Herbert <redacted> --- include/net/udp.h | 8 ++++++++ net/ipv4/udp.c | 8 ++++++++ net/ipv6/udp.c | 10 ++++++++++ 3 files changed, 26 insertions(+)
diff --git a/include/net/udp.h b/include/net/udp.h
index ea53a87..717a972 100644
--- a/include/net/udp.h
+++ b/include/net/udp.h@@ -275,6 +275,10 @@ struct sock *__udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport, struct udp_table *tbl, struct sk_buff *skb); struct sock *udp4_lib_lookup_skb(struct sk_buff *skb, __be16 sport, __be16 dport); +struct sock *udp4_lib_lookup_noref(struct net *net, + __be32 saddr, __be16 sport, + __be32 daddr, __be16 dport, + int dif); struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be16 sport, const struct in6_addr *daddr, __be16 dport,
@@ -286,6 +290,10 @@ struct sock *__udp6_lib_lookup(struct net *net, struct sk_buff *skb); struct sock *udp6_lib_lookup_skb(struct sk_buff *skb, __be16 sport, __be16 dport); +struct sock *udp6_lib_lookup_noref(struct net *net, + const struct in6_addr *saddr, __be16 sport, + const struct in6_addr *daddr, __be16 dport, + int dif); /* * SNMP statistics for UDP and UDP-Lite
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index 7d96dc2..7f84c51 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c@@ -595,6 +595,14 @@ struct sock *udp4_lib_lookup(struct net *net, __be32 saddr, __be16 sport, EXPORT_SYMBOL_GPL(udp4_lib_lookup); #endif +struct sock *udp4_lib_lookup_noref(struct net *net, __be32 saddr, __be16 sport, + __be32 daddr, __be16 dport, int dif) +{ + return __udp4_lib_lookup(net, saddr, sport, daddr, dport, + dif, &udp_table, NULL); +} +EXPORT_SYMBOL_GPL(udp4_lib_lookup_noref); + static inline bool __udp_is_mcast_sock(struct net *net, struct sock *sk, __be16 loc_port, __be32 loc_addr, __be16 rmt_port, __be32 rmt_addr,
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 9aa7c1c..6e382d9 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c@@ -317,6 +317,16 @@ struct sock *udp6_lib_lookup(struct net *net, const struct in6_addr *saddr, __be EXPORT_SYMBOL_GPL(udp6_lib_lookup); #endif +struct sock *udp6_lib_lookup_noref(struct net *net, + const struct in6_addr *saddr, __be16 sport, + const struct in6_addr *daddr, __be16 dport, + int dif) +{ + return __udp6_lib_lookup(net, saddr, sport, daddr, dport, + dif, &udp_table, NULL); +} +EXPORT_SYMBOL_GPL(udp6_lib_lookup_noref); + /* * This should be easy, if there is something there we * return it, otherwise we block.
--
2.9.3