[CONNECTOR]: async connector mode.

If input message rate from userspace is too high, do not drop them,
but try to deliver using work queue allocation.

Failing there is some kind of congestion control.

It also removes warn_on on this condition, which scares people.

Signed-off-by: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 6 deletions

diff --git a/include/linux/connector.h b/include/linux/connector.h
index 96de26301f84..86d4b0a81713 100644
--- a/include/linux/connector.h
+++ b/include/linux/connector.h
@@ -104,12 +104,19 @@ struct cn_queue_dev {
         struct sock *nls;
 };
 
-struct cn_callback {
+struct cn_callback_id {
         unsigned char name[CN_CBQ_NAMELEN];
-
         struct cb_id id;
+};
+
+struct cn_callback_data {
+        void (*destruct_data) (void *);
+        void *ddata;
+        
+        void *callback_priv;
         void (*callback) (void *);
-        void *priv;
+
+        void *free;
 };
 
 struct cn_callback_entry {
@@ -118,8 +125,8 @@ struct cn_callback_entry {
         struct work_struct work;
         struct cn_queue_dev *pdev;
 
-        void (*destruct_data) (void *);
-        void *ddata;
+        struct cn_callback_id id;
+        struct cn_callback_data data;
 
         int seq, group;
         struct sock *nls;
@@ -144,7 +151,7 @@ int cn_add_callback(struct cb_id *, char *, void (*callback) (void *));
 void cn_del_callback(struct cb_id *);
 int cn_netlink_send(struct cn_msg *, u32, int);
 
-int cn_queue_add_callback(struct cn_queue_dev *dev, struct cn_callback *cb);
+int cn_queue_add_callback(struct cn_queue_dev *dev, char *name, struct cb_id *id, void (*callback)(void *));
 void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id);
 
 struct cn_queue_dev *cn_queue_alloc_dev(char *name, struct sock *);
@@ -152,6 +159,8 @@ void cn_queue_free_dev(struct cn_queue_dev *dev);
 
 int cn_cb_equal(struct cb_id *, struct cb_id *);
 
+void cn_queue_wrapper(void *data);
+
 extern int cn_already_initialized;
 
 #endif                          /* __KERNEL__ */