diff options
| author | Julian Anastasov <ja@ssi.bg> | 2013-03-21 13:58:07 +0400 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2013-04-02 02:23:43 +0400 |
| commit | 363c97d7435ebba8a040f86e29bdec79ee182f0c (patch) | |
| tree | f472b8185419864ec9c1a95db2d88bbdb804fda7 /include | |
| parent | 026ace060dfe29275d2188297a62fa37d6c1a02c (diff) | |
| download | linux-363c97d7435ebba8a040f86e29bdec79ee182f0c.tar.xz | |
ipvs: convert app locks
We use locks like tcp_app_lock, udp_app_lock,
sctp_app_lock to protect access to the protocol hash tables
from readers in packet context while the application
instances (inc) are [un]registered under global mutex.
As the hash tables are mostly read when conns are
created and bound to app, use RCU for readers and reclaim
app instance after grace period.
Simplify ip_vs_app_inc_get because we use usecnt
only for statistics and rely on module refcounting.
Signed-off-by: Julian Anastasov <ja@ssi.bg>
Signed-off by: Hans Schillstrom <hans@schillstrom.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/ip_vs.h | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h index a150ff5d838c..84ca17141a44 100644 --- a/include/net/ip_vs.h +++ b/include/net/ip_vs.h @@ -823,6 +823,7 @@ struct ip_vs_app { struct ip_vs_app *app; /* its real application */ __be16 port; /* port number in net order */ atomic_t usecnt; /* usage counter */ + struct rcu_head rcu_head; /* * output hook: Process packet in inout direction, diff set for TCP. @@ -908,7 +909,6 @@ struct netns_ipvs { #define TCP_APP_TAB_SIZE (1 << TCP_APP_TAB_BITS) #define TCP_APP_TAB_MASK (TCP_APP_TAB_SIZE - 1) struct list_head tcp_apps[TCP_APP_TAB_SIZE]; - spinlock_t tcp_app_lock; #endif /* ip_vs_proto_udp */ #ifdef CONFIG_IP_VS_PROTO_UDP @@ -916,7 +916,6 @@ struct netns_ipvs { #define UDP_APP_TAB_SIZE (1 << UDP_APP_TAB_BITS) #define UDP_APP_TAB_MASK (UDP_APP_TAB_SIZE - 1) struct list_head udp_apps[UDP_APP_TAB_SIZE]; - spinlock_t udp_app_lock; #endif /* ip_vs_proto_sctp */ #ifdef CONFIG_IP_VS_PROTO_SCTP @@ -925,7 +924,6 @@ struct netns_ipvs { #define SCTP_APP_TAB_MASK (SCTP_APP_TAB_SIZE - 1) /* Hash table for SCTP application incarnations */ struct list_head sctp_apps[SCTP_APP_TAB_SIZE]; - spinlock_t sctp_app_lock; #endif /* ip_vs_conn */ atomic_t conn_count; /* connection counter */ |