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OpenCloudOS-Kernel
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tipc: move broadcast link lock to struct tipc_net 

The broadcast lock will need to be acquired outside bcast.c in a later
commit. For this reason, we move the lock to struct tipc_net. Consistent
with the changes in the previous commit, we also introducee two new
functions tipc_bcast_lock() and tipc_bcast_unlock(). The code that is
currently using tipc_bclink_lock()/unlock() will be phased out during
the coming commits in this series.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Paul Maloy 2015-10-22 08:51:34 -04:00 committed by David S. Miller
parent 6beb19a62a
commit 0043550b0a
3 changed files with 14 additions and 9 deletions
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12
net/tipc/bcast.c
View File

@ -90,7 +90,6 @@ struct tipc_bcbearer {
/**
* struct tipc_bc_base - link used for broadcast messages
* @lock: spinlock governing access to structure
* @link: (non-standard) broadcast link structure
* @node: (non-standard) node structure representing b'cast link's peer node
* @bcast_nodes: map of broadcast-capable nodes
@ -99,7 +98,6 @@ struct tipc_bcbearer {
* Handles sequence numbering, fragmentation, bundling, etc.
*/
struct tipc_bc_base {
spinlock_t lock; /* spinlock protecting broadcast structs */
struct tipc_link link;
struct tipc_node node;
struct sk_buff_head arrvq;
@ -124,16 +122,12 @@ static void tipc_nmap_add(struct tipc_node_map *nm_ptr, u32 node);
static void tipc_nmap_remove(struct tipc_node_map *nm_ptr, u32 node);
static void tipc_bclink_lock(struct net *net)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
spin_lock_bh(&tn->bcbase->lock);
tipc_bcast_lock(net);
}
static void tipc_bclink_unlock(struct net *net)
{
struct tipc_net *tn = net_generic(net, tipc_net_id);
spin_unlock_bh(&tn->bcbase->lock);
tipc_bcast_unlock(net);
}
void tipc_bclink_input(struct net *net)
@ -1031,7 +1025,7 @@ int tipc_bcast_init(struct net *net)
bcbearer->media.send_msg = tipc_bcbearer_send;
sprintf(bcbearer->media.name, "tipc-broadcast");
spin_lock_init(&bclink->lock);
spin_lock_init(&tipc_net(net)->bclock);
__skb_queue_head_init(&bcl->transmq);
__skb_queue_head_init(&bcl->backlogq);
__skb_queue_head_init(&bcl->deferdq);

10
net/tipc/bcast.h
View File

@ -69,4 +69,14 @@ int tipc_nl_bc_link_set(struct net *net, struct nlattr *attrs[]);
void tipc_bclink_input(struct net *net);
void tipc_bclink_sync_state(struct tipc_node *n, struct tipc_msg *msg);
static inline void tipc_bcast_lock(struct net *net)
{
spin_lock_bh(&tipc_net(net)->bclock);
}
static inline void tipc_bcast_unlock(struct net *net)
{
spin_unlock_bh(&tipc_net(net)->bclock);
}
#endif

1
net/tipc/core.h
View File

@ -93,6 +93,7 @@ struct tipc_net {
struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1];
/* Broadcast link */
spinlock_t bclock;
struct tipc_bcbearer *bcbearer;
struct tipc_bc_base *bcbase;
struct tipc_link *bcl;