tipc: Add support for customized subscription overlap handling
This patch enables TIPC's topology server code to do customized
overlap detection handling on a per-subscription basis. (This
capability is needed to support the upcoming introduction of
multi-cluster TIPC networks.)
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tipc/subscr.c b/net/tipc/subscr.c
index 8f8d0a6..81e2bd5 100644
--- a/net/tipc/subscr.c
+++ b/net/tipc/subscr.c
@@ -157,7 +157,8 @@
return;
if (!must && !(sub->filter & TIPC_SUB_PORTS))
return;
- subscr_send_event(sub, found_lower, found_upper, event, port_ref, node);
+
+ sub->event_cb(sub, found_lower, found_upper, event, port_ref, node);
}
/**
@@ -372,6 +373,7 @@
subscr_terminate(subscriber);
return;
}
+ sub->event_cb = subscr_send_event;
memcpy(&sub->evt.s, s, sizeof(struct tipc_subscr));
INIT_LIST_HEAD(&sub->subscription_list);
INIT_LIST_HEAD(&sub->nameseq_list);
diff --git a/net/tipc/subscr.h b/net/tipc/subscr.h
index 93a8e67..d955368 100644
--- a/net/tipc/subscr.h
+++ b/net/tipc/subscr.h
@@ -37,11 +37,18 @@
#ifndef _TIPC_SUBSCR_H
#define _TIPC_SUBSCR_H
+struct subscription;
+
+typedef void (*tipc_subscr_event) (struct subscription *sub,
+ u32 found_lower, u32 found_upper,
+ u32 event, u32 port_ref, u32 node);
+
/**
* struct subscription - TIPC network topology subscription object
* @seq: name sequence associated with subscription
* @timeout: duration of subscription (in ms)
* @filter: event filtering to be done for subscription
+ * @event_cb: routine invoked when a subscription event is detected
* @evt: template for events generated by subscription
* @subscription_list: adjacent subscriptions in subscriber's subscription list
* @nameseq_list: adjacent subscriptions in name sequence's subscription list
@@ -53,6 +60,7 @@
struct tipc_name_seq seq;
u32 timeout;
u32 filter;
+ tipc_subscr_event event_cb;
struct tipc_event evt;
struct list_head subscription_list;
struct list_head nameseq_list;