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authorJon Paul Maloy <jon.maloy@ericsson.com>2015-11-19 22:30:42 +0300
committerDavid S. Miller <davem@davemloft.net>2015-11-20 22:06:10 +0300
commit1d7e1c2595bd20c5274a8e49d89cf0cf483759de (patch)
tree291677f9816bfbcc47405245e5d06af4fcb23d2b
parent5c10e9794013143eec80d494603d46dcb219970a (diff)
downloadlinux-1d7e1c2595bd20c5274a8e49d89cf0cf483759de.tar.xz
tipc: reduce code dependency between binding table and node layer
The file name_distr.c currently contains three functions, named_cluster_distribute(), tipc_publ_subcscribe() and tipc_publ_unsubscribe() that all directly access fields in struct tipc_node. We want to eliminate such dependencies, so we move those functions to the file node.c and rename them to tipc_node_broadcast(), tipc_node_subscribe() and tipc_node_unsubscribe() respectively. Reviewed-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--net/tipc/core.h5
-rw-r--r--net/tipc/name_distr.c67
-rw-r--r--net/tipc/name_distr.h1
-rw-r--r--net/tipc/name_table.c5
-rw-r--r--net/tipc/node.c60
-rw-r--r--net/tipc/node.h3
6 files changed, 74 insertions, 67 deletions
diff --git a/net/tipc/core.h b/net/tipc/core.h
index 18e95a8020cd..5504d63503df 100644
--- a/net/tipc/core.h
+++ b/net/tipc/core.h
@@ -118,6 +118,11 @@ static inline int tipc_netid(struct net *net)
return tipc_net(net)->net_id;
}
+static inline struct list_head *tipc_nodes(struct net *net)
+{
+ return &tipc_net(net)->node_list;
+}
+
static inline u16 mod(u16 x)
{
return x & 0xffffu;
diff --git a/net/tipc/name_distr.c b/net/tipc/name_distr.c
index f51c8bdbea1c..ebe9d0ff6e9e 100644
--- a/net/tipc/name_distr.c
+++ b/net/tipc/name_distr.c
@@ -84,31 +84,6 @@ static struct sk_buff *named_prepare_buf(struct net *net, u32 type, u32 size,
return buf;
}
-void named_cluster_distribute(struct net *net, struct sk_buff *skb)
-{
- struct tipc_net *tn = net_generic(net, tipc_net_id);
- struct sk_buff *oskb;
- struct tipc_node *node;
- u32 dnode;
-
- rcu_read_lock();
- list_for_each_entry_rcu(node, &tn->node_list, list) {
- dnode = node->addr;
- if (in_own_node(net, dnode))
- continue;
- if (!tipc_node_is_up(node))
- continue;
- oskb = pskb_copy(skb, GFP_ATOMIC);
- if (!oskb)
- break;
- msg_set_destnode(buf_msg(oskb), dnode);
- tipc_node_xmit_skb(net, oskb, dnode, 0);
- }
- rcu_read_unlock();
-
- kfree_skb(skb);
-}
-
/**
* tipc_named_publish - tell other nodes about a new publication by this node
*/
@@ -226,42 +201,6 @@ void tipc_named_node_up(struct net *net, u32 dnode)
tipc_node_xmit(net, &head, dnode, 0);
}
-static void tipc_publ_subscribe(struct net *net, struct publication *publ,
- u32 addr)
-{
- struct tipc_node *node;
-
- if (in_own_node(net, addr))
- return;
-
- node = tipc_node_find(net, 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);
- tipc_node_put(node);
-}
-
-static void tipc_publ_unsubscribe(struct net *net, struct publication *publ,
- u32 addr)
-{
- struct tipc_node *node;
-
- node = tipc_node_find(net, addr);
- if (!node)
- return;
-
- tipc_node_lock(node);
- list_del_init(&publ->nodesub_list);
- tipc_node_unlock(node);
- tipc_node_put(node);
-}
-
/**
* tipc_publ_purge - remove publication associated with a failed node
*
@@ -277,7 +216,7 @@ static void tipc_publ_purge(struct net *net, struct publication *publ, u32 addr)
p = tipc_nametbl_remove_publ(net, publ->type, publ->lower,
publ->node, publ->ref, publ->key);
if (p)
- tipc_publ_unsubscribe(net, p, addr);
+ tipc_node_unsubscribe(net, &p->nodesub_list, addr);
spin_unlock_bh(&tn->nametbl_lock);
if (p != publ) {
@@ -317,7 +256,7 @@ static bool tipc_update_nametbl(struct net *net, struct distr_item *i,
TIPC_CLUSTER_SCOPE, node,
ntohl(i->ref), ntohl(i->key));
if (publ) {
- tipc_publ_subscribe(net, publ, node);
+ tipc_node_subscribe(net, &publ->nodesub_list, node);
return true;
}
} else if (dtype == WITHDRAWAL) {
@@ -326,7 +265,7 @@ static bool tipc_update_nametbl(struct net *net, struct distr_item *i,
node, ntohl(i->ref),
ntohl(i->key));
if (publ) {
- tipc_publ_unsubscribe(net, publ, node);
+ tipc_node_unsubscribe(net, &publ->nodesub_list, node);
kfree_rcu(publ, rcu);
return true;
}
diff --git a/net/tipc/name_distr.h b/net/tipc/name_distr.h
index dd2d9fd80da2..1264ba0af937 100644
--- a/net/tipc/name_distr.h
+++ b/net/tipc/name_distr.h
@@ -69,7 +69,6 @@ struct distr_item {
struct sk_buff *tipc_named_publish(struct net *net, struct publication *publ);
struct sk_buff *tipc_named_withdraw(struct net *net, struct publication *publ);
-void named_cluster_distribute(struct net *net, struct sk_buff *buf);
void tipc_named_node_up(struct net *net, u32 dnode);
void tipc_named_rcv(struct net *net, struct sk_buff_head *msg_queue);
void tipc_named_reinit(struct net *net);
diff --git a/net/tipc/name_table.c b/net/tipc/name_table.c
index 0f47f08bf38f..91fce70291a8 100644
--- a/net/tipc/name_table.c
+++ b/net/tipc/name_table.c
@@ -42,6 +42,7 @@
#include "subscr.h"
#include "bcast.h"
#include "addr.h"
+#include "node.h"
#include <net/genetlink.h>
#define TIPC_NAMETBL_SIZE 1024 /* must be a power of 2 */
@@ -677,7 +678,7 @@ struct publication *tipc_nametbl_publish(struct net *net, u32 type, u32 lower,
spin_unlock_bh(&tn->nametbl_lock);
if (buf)
- named_cluster_distribute(net, buf);
+ tipc_node_broadcast(net, buf);
return publ;
}
@@ -709,7 +710,7 @@ int tipc_nametbl_withdraw(struct net *net, u32 type, u32 lower, u32 ref,
spin_unlock_bh(&tn->nametbl_lock);
if (skb) {
- named_cluster_distribute(net, skb);
+ tipc_node_broadcast(net, skb);
return 1;
}
return 0;
diff --git a/net/tipc/node.c b/net/tipc/node.c
index 7756804034e2..932195258551 100644
--- a/net/tipc/node.c
+++ b/net/tipc/node.c
@@ -234,6 +234,42 @@ void tipc_node_stop(struct net *net)
spin_unlock_bh(&tn->node_list_lock);
}
+void tipc_node_subscribe(struct net *net, struct list_head *subscr, u32 addr)
+{
+ struct tipc_node *n;
+
+ if (in_own_node(net, addr))
+ return;
+
+ n = tipc_node_find(net, addr);
+ if (!n) {
+ pr_warn("Node subscribe rejected, unknown node 0x%x\n", addr);
+ return;
+ }
+ tipc_node_lock(n);
+ list_add_tail(subscr, &n->publ_list);
+ tipc_node_unlock(n);
+ tipc_node_put(n);
+}
+
+void tipc_node_unsubscribe(struct net *net, struct list_head *subscr, u32 addr)
+{
+ struct tipc_node *n;
+
+ if (in_own_node(net, addr))
+ return;
+
+ n = tipc_node_find(net, addr);
+ if (!n) {
+ pr_warn("Node unsubscribe rejected, unknown node 0x%x\n", addr);
+ return;
+ }
+ tipc_node_lock(n);
+ list_del_init(subscr);
+ tipc_node_unlock(n);
+ tipc_node_put(n);
+}
+
int tipc_node_add_conn(struct net *net, u32 dnode, u32 port, u32 peer_port)
{
struct tipc_node *node;
@@ -1075,6 +1111,30 @@ int tipc_node_xmit_skb(struct net *net, struct sk_buff *skb, u32 dnode,
return 0;
}
+void tipc_node_broadcast(struct net *net, struct sk_buff *skb)
+{
+ struct sk_buff *txskb;
+ struct tipc_node *n;
+ u32 dst;
+
+ rcu_read_lock();
+ list_for_each_entry_rcu(n, tipc_nodes(net), list) {
+ dst = n->addr;
+ if (in_own_node(net, dst))
+ continue;
+ if (!tipc_node_is_up(n))
+ continue;
+ txskb = pskb_copy(skb, GFP_ATOMIC);
+ if (!txskb)
+ break;
+ msg_set_destnode(buf_msg(txskb), dst);
+ tipc_node_xmit_skb(net, txskb, dst, 0);
+ }
+ rcu_read_unlock();
+
+ kfree_skb(skb);
+}
+
/**
* tipc_node_bc_rcv - process TIPC broadcast packet arriving from off-node
* @net: the applicable net namespace
diff --git a/net/tipc/node.h b/net/tipc/node.h
index 6734562d3c6e..dd79e9742bd6 100644
--- a/net/tipc/node.h
+++ b/net/tipc/node.h
@@ -149,6 +149,9 @@ int tipc_node_xmit(struct net *net, struct sk_buff_head *list, u32 dnode,
int selector);
int tipc_node_xmit_skb(struct net *net, struct sk_buff *skb, u32 dest,
u32 selector);
+void tipc_node_subscribe(struct net *net, struct list_head *subscr, u32 addr);
+void tipc_node_unsubscribe(struct net *net, struct list_head *subscr, u32 addr);
+void tipc_node_broadcast(struct net *net, struct sk_buff *skb);
int tipc_node_add_conn(struct net *net, u32 dnode, u32 port, u32 peer_port);
void tipc_node_remove_conn(struct net *net, u32 dnode, u32 port);
int tipc_nl_node_dump(struct sk_buff *skb, struct netlink_callback *cb);