migration: Remove MigrationState from migration_in_postcopy

We need to call for the migrate_get_current() in more that half of the
uses, so call that inside.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>

include/migration/migration.h

@@ -238,7 +238,7 @@ bool migration_is_idle(MigrationState *s);
 bool migration_has_finished(MigrationState *);
 bool migration_has_failed(MigrationState *);
 /* True if outgoing migration has entered postcopy phase */
-bool migration_in_postcopy(MigrationState *);
+bool migration_in_postcopy(void);
 /* ...and after the device transmission */
 bool migration_in_postcopy_after_devices(MigrationState *);
 MigrationState *migrate_get_current(void);

migration/migration.c

@@ -1062,14 +1062,16 @@ bool migration_has_failed(MigrationState *s)
             s->state == MIGRATION_STATUS_FAILED);
 }
 
-bool migration_in_postcopy(MigrationState *s)
+bool migration_in_postcopy(void)
 {
+    MigrationState *s = migrate_get_current();
+
     return (s->state == MIGRATION_STATUS_POSTCOPY_ACTIVE);
 }
 
 bool migration_in_postcopy_after_devices(MigrationState *s)
 {
-    return migration_in_postcopy(s) && s->postcopy_after_devices;
+    return migration_in_postcopy() && s->postcopy_after_devices;
 }
 
 bool migration_is_idle(MigrationState *s)

migration/ram.c

@@ -776,10 +776,9 @@ static int save_zero_page(RAMState *rs, RAMBlock *block, ram_addr_t offset,
     return pages;
 }
 
-static void ram_release_pages(MigrationState *ms, const char *rbname,
-                              uint64_t offset, int pages)
+static void ram_release_pages(const char *rbname, uint64_t offset, int pages)
 {
-    if (!migrate_release_ram() || !migration_in_postcopy(ms)) {
+    if (!migrate_release_ram() || !migration_in_postcopy()) {
         return;
     }
 
@@ -845,9 +844,9 @@ static int ram_save_page(RAMState *rs, MigrationState *ms,
              * page would be stale
              */
             xbzrle_cache_zero_page(rs, current_addr);
-            ram_release_pages(ms, block->idstr, pss->offset, pages);
+            ram_release_pages(block->idstr, pss->offset, pages);
         } else if (!rs->ram_bulk_stage &&
-                   !migration_in_postcopy(ms) && migrate_use_xbzrle()) {
+                   !migration_in_postcopy() && migrate_use_xbzrle()) {
             pages = save_xbzrle_page(rs, &p, current_addr, block,
                                      offset, last_stage);
             if (!last_stage) {
@@ -866,7 +865,7 @@ static int ram_save_page(RAMState *rs, MigrationState *ms,
         if (send_async) {
             qemu_put_buffer_async(rs->f, p, TARGET_PAGE_SIZE,
                                   migrate_release_ram() &
-                                  migration_in_postcopy(ms));
+                                  migration_in_postcopy());
         } else {
             qemu_put_buffer(rs->f, p, TARGET_PAGE_SIZE);
         }
@@ -896,8 +895,7 @@ static int do_compress_ram_page(QEMUFile *f, RAMBlock *block,
         error_report("compressed data failed!");
     } else {
         bytes_sent += blen;
-        ram_release_pages(migrate_get_current(), block->idstr,
-                          offset & TARGET_PAGE_MASK, 1);
+        ram_release_pages(block->idstr, offset & TARGET_PAGE_MASK, 1);
     }
 
     return bytes_sent;
@@ -1033,7 +1031,7 @@ static int ram_save_compressed_page(RAMState *rs, MigrationState *ms,
                 }
             }
             if (pages > 0) {
-                ram_release_pages(ms, block->idstr, pss->offset, pages);
+                ram_release_pages(block->idstr, pss->offset, pages);
             }
         } else {
             offset |= RAM_SAVE_FLAG_CONTINUE;
@@ -1041,7 +1039,7 @@ static int ram_save_compressed_page(RAMState *rs, MigrationState *ms,
             if (pages == -1) {
                 pages = compress_page_with_multi_thread(rs, block, offset);
             } else {
-                ram_release_pages(ms, block->idstr, pss->offset, pages);
+                ram_release_pages(block->idstr, pss->offset, pages);
             }
         }
     }
@@ -2200,7 +2198,7 @@ static int ram_save_complete(QEMUFile *f, void *opaque)
 
     rcu_read_lock();
 
-    if (!migration_in_postcopy(migrate_get_current())) {
+    if (!migration_in_postcopy()) {
         migration_bitmap_sync(rs);
     }
 
@@ -2238,7 +2236,7 @@ static void ram_save_pending(QEMUFile *f, void *opaque, uint64_t max_size,
 
     remaining_size = rs->migration_dirty_pages * TARGET_PAGE_SIZE;
 
-    if (!migration_in_postcopy(migrate_get_current()) &&
+    if (!migration_in_postcopy() &&
         remaining_size < max_size) {
         qemu_mutex_lock_iothread();
         rcu_read_lock();

migration/savevm.c

@@ -1062,7 +1062,7 @@ int qemu_savevm_state_iterate(QEMUFile *f, bool postcopy)
 static bool should_send_vmdesc(void)
 {
     MachineState *machine = MACHINE(qdev_get_machine());
-    bool in_postcopy = migration_in_postcopy(migrate_get_current());
+    bool in_postcopy = migration_in_postcopy();
     return !machine->suppress_vmdesc && !in_postcopy;
 }
 
@@ -1111,7 +1111,7 @@ void qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only)
     int vmdesc_len;
     SaveStateEntry *se;
     int ret;
-    bool in_postcopy = migration_in_postcopy(migrate_get_current());
+    bool in_postcopy = migration_in_postcopy();
 
     trace_savevm_state_complete_precopy();