Drivers: hv: vmbus: add a per-channel rescind callback

This will be used by the coming hv_sock driver.

Signed-off-by: Dexuan Cui <decui@microsoft.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index f636f91f104b..2e54e34e5feb 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -766,6 +766,12 @@ struct vmbus_channel {
         void (*sc_creation_callback)(struct vmbus_channel *new_sc);
 
         /*
+         * Channel rescind callback. Some channels (the hvsock ones), need to
+         * register a callback which is invoked in vmbus_onoffer_rescind().
+         */
+        void (*chn_rescind_callback)(struct vmbus_channel *channel);
+
+        /*
          * The spinlock to protect the structure. It is being used to protect
          * test-and-set access to various attributes of the structure as well
          * as all sc_list operations.
@@ -851,6 +857,9 @@ int vmbus_request_offers(void);
 void vmbus_set_sc_create_callback(struct vmbus_channel *primary_channel,
                         void (*sc_cr_cb)(struct vmbus_channel *new_sc));
 
+void vmbus_set_chn_rescind_callback(struct vmbus_channel *channel,
+                void (*chn_rescind_cb)(struct vmbus_channel *));
+
 /*
  * Retrieve the (sub) channel on which to send an outgoing request.
  * When a primary channel has multiple sub-channels, we choose a