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| author | stephen hemminger <shemminger@vyatta.com> | 2010-02-22 07:57:18 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-02-22 15:45:56 -0800 |
| commit | 808f5114a9206fee855117d416440e1071ab375c (patch) | |
| tree | cec3f04220909b77c0880029b63862553ad5161c /include/net | |
| parent | 1cc523271ef0b6305c565a143e3d48f6fff826dd (diff) | |
| download | kernel_samsung_espresso10-808f5114a9206fee855117d416440e1071ab375c.zip kernel_samsung_espresso10-808f5114a9206fee855117d416440e1071ab375c.tar.gz kernel_samsung_espresso10-808f5114a9206fee855117d416440e1071ab375c.tar.bz2 | |
packet: convert socket list to RCU (v3)
Convert AF_PACKET to use RCU, eliminating one more reader/writer lock.
There is no need for a real sk_del_node_init_rcu(), because sk_del_node_init
is doing the equivalent thing to hlst_del_init_rcu already; but added
some comments to try and make that obvious.
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/netns/packet.h | 4 | ||||
| -rw-r--r-- | include/net/sock.h | 10 |
2 files changed, 12 insertions, 2 deletions
diff --git a/include/net/netns/packet.h b/include/net/netns/packet.h index 637daf6..cb4e894 100644 --- a/include/net/netns/packet.h +++ b/include/net/netns/packet.h @@ -4,11 +4,11 @@ #ifndef __NETNS_PACKET_H__ #define __NETNS_PACKET_H__ -#include <linux/list.h> +#include <linux/rculist.h> #include <linux/spinlock.h> struct netns_packet { - rwlock_t sklist_lock; + spinlock_t sklist_lock; struct hlist_head sklist; }; diff --git a/include/net/sock.h b/include/net/sock.h index 580d51f..6cb1676 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -381,6 +381,7 @@ static __inline__ void __sk_del_node(struct sock *sk) __hlist_del(&sk->sk_node); } +/* NB: equivalent to hlist_del_init_rcu */ static __inline__ int __sk_del_node_init(struct sock *sk) { if (sk_hashed(sk)) { @@ -421,6 +422,7 @@ static __inline__ int sk_del_node_init(struct sock *sk) } return rc; } +#define sk_del_node_init_rcu(sk) sk_del_node_init(sk) static __inline__ int __sk_nulls_del_node_init_rcu(struct sock *sk) { @@ -454,6 +456,12 @@ static __inline__ void sk_add_node(struct sock *sk, struct hlist_head *list) __sk_add_node(sk, list); } +static __inline__ void sk_add_node_rcu(struct sock *sk, struct hlist_head *list) +{ + sock_hold(sk); + hlist_add_head_rcu(&sk->sk_node, list); +} + static __inline__ void __sk_nulls_add_node_rcu(struct sock *sk, struct hlist_nulls_head *list) { hlist_nulls_add_head_rcu(&sk->sk_nulls_node, list); @@ -478,6 +486,8 @@ static __inline__ void sk_add_bind_node(struct sock *sk, #define sk_for_each(__sk, node, list) \ hlist_for_each_entry(__sk, node, list, sk_node) +#define sk_for_each_rcu(__sk, node, list) \ + hlist_for_each_entry_rcu(__sk, node, list, sk_node) #define sk_nulls_for_each(__sk, node, list) \ hlist_nulls_for_each_entry(__sk, node, list, sk_nulls_node) #define sk_nulls_for_each_rcu(__sk, node, list) \ |