1 files changed, 29 insertions, 18 deletions

diff --git a/net/tipc/link.h b/net/tipc/link.h
index 55812e87ca1e..7aeb52092bf3 100644
--- a/net/tipc/link.h
+++ b/net/tipc/link.h
@@ -41,6 +41,10 @@
 #include "msg.h"
 #include "node.h"
 
+/* TIPC-specific error codes
+*/
+#define ELINKCONG EAGAIN        /* link congestion <=> resource unavailable */
+
 /* Out-of-range value for link sequence numbers
  */
 #define INVALID_LINK_SEQ 0x10000
@@ -99,13 +103,14 @@ struct tipc_stats {
  * @media_addr: media address to use when sending messages over link
  * @timer: link timer
  * @owner: pointer to peer node
+ * @refcnt: reference counter for permanent references (owner node & timer)
  * @flags: execution state flags for link endpoint instance
  * @checkpoint: reference point for triggering link continuity checking
  * @peer_session: link session # being used by peer end of link
  * @peer_bearer_id: bearer id used by link's peer endpoint
  * @bearer_id: local bearer id used by link
  * @tolerance: minimum link continuity loss needed to reset link [in ms]
- * @continuity_interval: link continuity testing interval [in ms]
+ * @cont_intv: link continuity testing interval
  * @abort_limit: # of unacknowledged continuity probes needed to reset link
  * @state: current state of link FSM
  * @fsm_msg_cnt: # of protocol messages link FSM has sent in current state
@@ -126,8 +131,10 @@ struct tipc_stats {
  * @next_in_no: next sequence number to expect for inbound messages
  * @deferred_queue: deferred queue saved OOS b'cast message received from node
  * @unacked_window: # of inbound messages rx'd without ack'ing back to peer
+ * @inputq: buffer queue for messages to be delivered upwards
+ * @namedq: buffer queue for name table messages to be delivered upwards
  * @next_out: ptr to first unsent outbound message in queue
- * @waiting_sks: linked list of sockets waiting for link congestion to abate
+ * @wakeupq: linked list of wakeup msgs waiting for link congestion to abate
  * @long_msg_seq_no: next identifier to use for outbound fragmented messages
  * @reasm_buf: head of partially reassembled inbound message fragments
  * @stats: collects statistics regarding link activity
@@ -138,6 +145,7 @@ struct tipc_link {
         struct tipc_media_addr media_addr;
         struct timer_list timer;
         struct tipc_node *owner;
+        struct kref ref;
 
         /* Management and link supervision data */
         unsigned int flags;
@@ -146,7 +154,7 @@ struct tipc_link {
         u32 peer_bearer_id;
         u32 bearer_id;
         u32 tolerance;
-        u32 continuity_interval;
+        unsigned long cont_intv;
         u32 abort_limit;
         int state;
         u32 fsm_msg_cnt;
@@ -178,10 +186,12 @@ struct tipc_link {
         u32 next_in_no;
         struct sk_buff_head deferred_queue;
         u32 unacked_window;
+        struct sk_buff_head inputq;
+        struct sk_buff_head namedq;
 
         /* Congestion handling */
         struct sk_buff *next_out;
-        struct sk_buff_head waiting_sks;
+        struct sk_buff_head wakeupq;
 
         /* Fragmentation/reassembly */
         u32 long_msg_seq_no;
@@ -196,28 +206,24 @@ struct tipc_port;
 struct tipc_link *tipc_link_create(struct tipc_node *n_ptr,
                               struct tipc_bearer *b_ptr,
                               const struct tipc_media_addr *media_addr);
-void tipc_link_delete_list(unsigned int bearer_id, bool shutting_down);
+void tipc_link_delete(struct tipc_link *link);
+void tipc_link_delete_list(struct net *net, unsigned int bearer_id,
+                           bool shutting_down);
 void tipc_link_failover_send_queue(struct tipc_link *l_ptr);
 void tipc_link_dup_queue_xmit(struct tipc_link *l_ptr, struct tipc_link *dest);
 void tipc_link_reset_fragments(struct tipc_link *l_ptr);
 int tipc_link_is_up(struct tipc_link *l_ptr);
 int tipc_link_is_active(struct tipc_link *l_ptr);
 void tipc_link_purge_queues(struct tipc_link *l_ptr);
-struct sk_buff *tipc_link_cmd_config(const void *req_tlv_area,
-                                     int req_tlv_space,
-                                     u16 cmd);
-struct sk_buff *tipc_link_cmd_show_stats(const void *req_tlv_area,
-                                         int req_tlv_space);
-struct sk_buff *tipc_link_cmd_reset_stats(const void *req_tlv_area,
-                                          int req_tlv_space);
 void tipc_link_reset_all(struct tipc_node *node);
 void tipc_link_reset(struct tipc_link *l_ptr);
-void tipc_link_reset_list(unsigned int bearer_id);
-int tipc_link_xmit_skb(struct sk_buff *skb, u32 dest, u32 selector);
-int tipc_link_xmit(struct sk_buff_head *list, u32 dest, u32 selector);
-int __tipc_link_xmit(struct tipc_link *link, struct sk_buff_head *list);
-u32 tipc_link_get_max_pkt(u32 dest, u32 selector);
-void tipc_link_bundle_rcv(struct sk_buff *buf);
+void tipc_link_reset_list(struct net *net, unsigned int bearer_id);
+int tipc_link_xmit_skb(struct net *net, struct sk_buff *skb, u32 dest,
+                       u32 selector);
+int tipc_link_xmit(struct net *net, struct sk_buff_head *list, u32 dest,
+                   u32 selector);
+int __tipc_link_xmit(struct net *net, struct tipc_link *link,
+                     struct sk_buff_head *list);
 void tipc_link_proto_xmit(struct tipc_link *l_ptr, u32 msg_typ, int prob,
                           u32 gap, u32 tolerance, u32 priority, u32 acked_mtu);
 void tipc_link_push_packets(struct tipc_link *l_ptr);
@@ -233,6 +239,7 @@ int tipc_nl_link_get(struct sk_buff *skb, struct genl_info *info);
 int tipc_nl_link_set(struct sk_buff *skb, struct genl_info *info);
 int tipc_nl_link_reset_stats(struct sk_buff *skb, struct genl_info *info);
 int tipc_nl_parse_link_prop(struct nlattr *prop, struct nlattr *props[]);
+void link_prepare_wakeup(struct tipc_link *l);
 
 /*
  * Link sequence number manipulation routines (uses modulo 2**16 arithmetic)
@@ -267,6 +274,10 @@ static inline u32 lesser(u32 left, u32 right)
         return less_eq(left, right) ? left : right;
 }
 
+static inline u32 link_own_addr(struct tipc_link *l)
+{
+        return msg_prevnode(l->pmsg);
+}
 
 /*
  * Link status checking routines