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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>
This commit is contained in:
Jon Paul Maloy 2015-11-19 14:30:42 -05:00 committed by David S. Miller
parent 5c10e97940
commit 1d7e1c2595
6 changed files with 74 additions and 67 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
net/tipc/core.h
View File

@ -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;

67
net/tipc/name_distr.c
View File

@ -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;
}

1
net/tipc/name_distr.h
View File

@ -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);

5
net/tipc/name_table.c
View File

@ -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;

60
net/tipc/node.c
View File

@ -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

3
net/tipc/node.h
View File

@ -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);