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authorYing Xue <ying.xue@windriver.com>2014-11-26 04:41:45 +0100
committerDavid S. Miller <davem@davemloft.net>2014-11-26 18:30:16 +0100
commita8f48af587b0f257c49dce5b49a62554a4b8627e (patch)
treedd28b059961d63e1f925a5c34f05fb14a741d405 /net/tipc/name_distr.c
parentipv6: Remove unnecessary test (diff)
downloadlinux-a8f48af587b0f257c49dce5b49a62554a4b8627e.tar.xz
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tipc: remove node subscription infrastructure
The node subscribe infrastructure represents a virtual base class, so its users, such as struct tipc_port and struct publication, can derive its implemented functionalities. However, after the removal of struct tipc_port, struct publication is left as its only single user now. So defining an abstract infrastructure for one user becomes no longer reasonable. If corresponding new functions associated with the infrastructure are moved to name_table.c file, the node subscription infrastructure can be removed as well. Signed-off-by: Ying Xue <ying.xue@windriver.com> Reviewed-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc/name_distr.c')
-rw-r--r--net/tipc/name_distr.c52
1 files changed, 45 insertions, 7 deletions
diff --git a/net/tipc/name_distr.c b/net/tipc/name_distr.c
index 376d2bb51d8d..6c2638d3c659 100644
--- a/net/tipc/name_distr.c
+++ b/net/tipc/name_distr.c
@@ -250,13 +250,45 @@ void tipc_named_node_up(u32 dnode)
tipc_link_xmit(buf_chain, dnode, dnode);
}
+static void tipc_publ_subscribe(struct publication *publ, u32 addr)
+{
+ struct tipc_node *node;
+
+ if (in_own_node(addr))
+ return;
+
+ node = tipc_node_find(addr);
+ if (!node) {
+ pr_warn("Node subscription rejected, unknown node 0x%x\n",
+ addr);
+ return;
+ }
+
+ tipc_node_lock(node);
+ list_add_tail(&publ->nodesub_list, &node->publ_list);
+ tipc_node_unlock(node);
+}
+
+static void tipc_publ_unsubscribe(struct publication *publ, u32 addr)
+{
+ struct tipc_node *node;
+
+ node = tipc_node_find(addr);
+ if (!node)
+ return;
+
+ tipc_node_lock(node);
+ list_del_init(&publ->nodesub_list);
+ tipc_node_unlock(node);
+}
+
/**
- * named_purge_publ - remove publication associated with a failed node
+ * tipc_publ_purge - remove publication associated with a failed node
*
* Invoked for each publication issued by a newly failed node.
* Removes publication structure from name table & deletes it.
*/
-static void named_purge_publ(struct publication *publ)
+static void tipc_publ_purge(struct publication *publ, u32 addr)
{
struct publication *p;
@@ -264,7 +296,7 @@ static void named_purge_publ(struct publication *publ)
p = tipc_nametbl_remove_publ(publ->type, publ->lower,
publ->node, publ->ref, publ->key);
if (p)
- tipc_nodesub_unsubscribe(&p->subscr);
+ tipc_publ_unsubscribe(p, addr);
write_unlock_bh(&tipc_nametbl_lock);
if (p != publ) {
@@ -277,6 +309,14 @@ static void named_purge_publ(struct publication *publ)
kfree(p);
}
+void tipc_publ_notify(struct list_head *nsub_list, u32 addr)
+{
+ struct publication *publ, *tmp;
+
+ list_for_each_entry_safe(publ, tmp, nsub_list, nodesub_list)
+ tipc_publ_purge(publ, addr);
+}
+
/**
* tipc_update_nametbl - try to process a nametable update and notify
* subscribers
@@ -294,9 +334,7 @@ static bool tipc_update_nametbl(struct distr_item *i, u32 node, u32 dtype)
TIPC_CLUSTER_SCOPE, node,
ntohl(i->ref), ntohl(i->key));
if (publ) {
- tipc_nodesub_subscribe(&publ->subscr, node, publ,
- (net_ev_handler)
- named_purge_publ);
+ tipc_publ_subscribe(publ, node);
return true;
}
} else if (dtype == WITHDRAWAL) {
@@ -304,7 +342,7 @@ static bool tipc_update_nametbl(struct distr_item *i, u32 node, u32 dtype)
node, ntohl(i->ref),
ntohl(i->key));
if (publ) {
- tipc_nodesub_unsubscribe(&publ->subscr);
+ tipc_publ_unsubscribe(publ, node);
kfree(publ);
return true;
}