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authorJulian Anastasov <ja@ssi.bg>2013-03-22 11:46:37 +0200
committerPablo Neira Ayuso <pablo@netfilter.org>2013-04-02 00:23:47 +0200
commit6b6df46663e7aa6f7b1d82435a3488f9b81316b3 (patch)
tree72d44c02f38bbe96bc4a468da732abbd23037008 /include/net/ip_vs.h
parent71dfa982f177d7b1e51e8d48b4c69da0b0e17e3c (diff)
ipvs: preparations for using rcu in schedulers
Allow schedulers to use rcu_dereference when returning destination on lookup. The RCU read-side critical section will allow ip_vs_bind_dest to get dest refcnt as preparation for the step where destinations will be deleted without an IP_VS_WAIT_WHILE guard that holds the packet processing during update. Add new optional scheduler methods add_dest, del_dest and upd_dest. For now the methods are called together with update_service but update_service will be removed in a following change. Signed-off-by: Julian Anastasov <ja@ssi.bg> Signed-off-by: Simon Horman <horms@verge.net.au>
Diffstat (limited to 'include/net/ip_vs.h')
-rw-r--r--include/net/ip_vs.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/net/ip_vs.h b/include/net/ip_vs.h
index 43886bb282fb..d91385c1b3a2 100644
--- a/include/net/ip_vs.h
+++ b/include/net/ip_vs.h
@@ -805,6 +805,12 @@ struct ip_vs_scheduler {
int (*done_service)(struct ip_vs_service *svc);
/* scheduler updating service */
int (*update_service)(struct ip_vs_service *svc);
+ /* dest is linked */
+ int (*add_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest);
+ /* dest is unlinked */
+ int (*del_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest);
+ /* dest is updated */
+ int (*upd_dest)(struct ip_vs_service *svc, struct ip_vs_dest *dest);
/* selecting a server from the given service */
struct ip_vs_dest* (*schedule)(struct ip_vs_service *svc,