migration/postcopy: Update the bandwidth during postcopy

[qemu.git] / migration / postcopy-ram.h

diff --git a/migration/postcopy-ram.h b/migration/postcopy-ram.h
index f21eef67028976bf552b92d01640ffdfba269207..9d55536fd1ee4084d5f051d517af0a290541cc32 100644 (file)
--- a/migration/postcopy-ram.h
+++ b/migration/postcopy-ram.h
@@ -27,7 +27,7 @@ int postcopy_ram_enable_notify(MigrationIncomingState *mis);
  * postcopy later; must be called prior to any precopy.
  * called from ram.c's similarly named ram_postcopy_incoming_init
  */
-int postcopy_ram_incoming_init(MigrationIncomingState *mis, size_t ram_pages);
+int postcopy_ram_incoming_init(MigrationIncomingState *mis);
 
 /*
  * At the end of a migration where postcopy_ram_incoming_init was called.
@@ -131,6 +131,8 @@ void postcopy_infrastructure_init(void);
 enum PostcopyNotifyReason {
     POSTCOPY_NOTIFY_PROBE = 0,
     POSTCOPY_NOTIFY_INBOUND_ADVISE,
+    POSTCOPY_NOTIFY_INBOUND_LISTEN,
+    POSTCOPY_NOTIFY_INBOUND_END,
 };
 
 struct PostcopyNotifyData {
@@ -147,6 +149,10 @@ struct PostCopyFD;
 
 /* ufd is a pointer to the struct uffd_msg *TODO: more Portable! */
 typedef int (*pcfdhandler)(struct PostCopyFD *pcfd, void *ufd);
+/* Notification to wake, either on place or on reception of
+ * a fault on something that's already arrived (race)
+ */
+typedef int (*pcfdwake)(struct PostCopyFD *pcfd, RAMBlock *rb, uint64_t offset);
 
 struct PostCopyFD {
     int fd;
@@ -154,6 +160,8 @@ struct PostCopyFD {
     void *data;
     /* Handler to be called whenever we get a poll event */
     pcfdhandler handler;
+    /* Notification to wake shared client */
+    pcfdwake waker;
     /* A string to use in error messages */
     const char *idstr;
 };
@@ -163,5 +171,22 @@ struct PostCopyFD {
  */
 void postcopy_register_shared_ufd(struct PostCopyFD *pcfd);
 void postcopy_unregister_shared_ufd(struct PostCopyFD *pcfd);
+/* Call each of the shared 'waker's registerd telling them of
+ * availability of a block.
+ */
+int postcopy_notify_shared_wake(RAMBlock *rb, uint64_t offset);
+/* postcopy_wake_shared: Notify a client ufd that a page is available
+ *
+ * Returns 0 on success
+ *
+ * @pcfd: Structure with fd, handler and name as above
+ * @client_addr: Address in the client program, not QEMU
+ * @rb: The RAMBlock the page is in
+ */
+int postcopy_wake_shared(struct PostCopyFD *pcfd, uint64_t client_addr,
+                         RAMBlock *rb);
+/* Callback from shared fault handlers to ask for a page */
+int postcopy_request_shared_page(struct PostCopyFD *pcfd, RAMBlock *rb,
+                                 uint64_t client_addr, uint64_t offset);
 
 #endif