migration: Create options.c

We move there all capabilities helpers from migration.c.

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

---

Following David advise:
- looked through the history, capabilities are newer than 2012, so we
  can remove that bit of the header.
- This part is posterior to Anthony.
  Original Author is Orit. Once there,
  I put myself.  Peter Xu also did quite a bit of work here.
  Anyone else wants/needs to be there?  I didn't search too hard
  because nobody asked before to be added.

What do you think?

hw/virtio/virtio-balloon.c

@@ -32,6 +32,7 @@
 #include "qemu/error-report.h"
 #include "migration/misc.h"
 #include "migration/migration.h"
+#include "migration/options.h"
 
 #include "hw/virtio/virtio-bus.h"
 #include "hw/virtio/virtio-access.h"

migration/block-dirty-bitmap.c

@@ -79,6 +79,7 @@
 #include "qapi/qapi-visit-migration.h"
 #include "qapi/clone-visitor.h"
 #include "trace.h"
+#include "options.h"
 
 #define CHUNK_SIZE     (1 << 10)
 

migration/block.c

@@ -28,6 +28,7 @@
 #include "migration/vmstate.h"
 #include "sysemu/block-backend.h"
 #include "trace.h"
+#include "options.h"
 
 #define BLK_MIG_BLOCK_SIZE           (1ULL << 20)
 #define BDRV_SECTORS_PER_DIRTY_CHUNK (BLK_MIG_BLOCK_SIZE >> BDRV_SECTOR_BITS)

migration/colo.c

@@ -36,6 +36,7 @@
 #include "sysemu/cpus.h"
 #include "sysemu/runstate.h"
 #include "net/filter.h"
+#include "options.h"
 
 static bool vmstate_loading;
 static Notifier packets_compare_notifier;

migration/meson.build

@@ -22,6 +22,7 @@ softmmu_ss.add(files(
   'migration.c',
   'multifd.c',
   'multifd-zlib.c',
+  'options.c',
   'postcopy-ram.c',
   'savevm.c',
   'socket.c',

migration/migration.c

@@ -63,6 +63,7 @@
 #include "sysemu/cpus.h"
 #include "yank_functions.h"
 #include "sysemu/qtest.h"
+#include "options.h"
 
 #define MAX_THROTTLE  (128 << 20)      /* Migration transfer speed throttling */
 
@@ -357,15 +358,6 @@ static void migrate_generate_event(int new_state)
     }
 }
 
-static bool migrate_late_block_activate(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->capabilities[MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE];
-}
-
 /*
  * Send a message on the return channel back to the source
  * of the migration.
@@ -2525,56 +2517,11 @@ void qmp_migrate_continue(MigrationStatus state, Error **errp)
     qemu_sem_post(&s->pause_sem);
 }
 
-bool migrate_release_ram(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->capabilities[MIGRATION_CAPABILITY_RELEASE_RAM];
-}
-
-bool migrate_postcopy_ram(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM];
-}
-
 bool migrate_postcopy(void)
 {
     return migrate_postcopy_ram() || migrate_dirty_bitmaps();
 }
 
-bool migrate_auto_converge(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE];
-}
-
-bool migrate_zero_blocks(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS];
-}
-
-bool migrate_postcopy_blocktime(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME];
-}
-
 bool migrate_use_compression(void)
 {
     MigrationState *s;
@@ -2620,33 +2567,6 @@ int migrate_decompress_threads(void)
     return s->parameters.decompress_threads;
 }
 
-bool migrate_dirty_bitmaps(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS];
-}
-
-bool migrate_ignore_shared(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED];
-}
-
-bool migrate_validate_uuid(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->capabilities[MIGRATION_CAPABILITY_VALIDATE_UUID];
-}
-
 bool migrate_use_events(void)
 {
     MigrationState *s;
@@ -2665,15 +2585,6 @@ bool migrate_use_multifd(void)
     return s->capabilities[MIGRATION_CAPABILITY_MULTIFD];
 }
 
-bool migrate_pause_before_switchover(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->capabilities[MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER];
-}
-
 int migrate_multifd_channels(void)
 {
     MigrationState *s;
@@ -2785,24 +2696,6 @@ bool migrate_use_block_incremental(void)
     return s->parameters.block_incremental;
 }
 
-bool migrate_background_snapshot(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->capabilities[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT];
-}
-
-bool migrate_postcopy_preempt(void)
-{
-    MigrationState *s;
-
-    s = migrate_get_current();
-
-    return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT];
-}
-
 /* migration thread support */
 /*
  * Something bad happened to the RP stream, mark an error

migration/migration.h

@@ -449,16 +449,7 @@ MigrationState *migrate_get_current(void);
 
 bool migrate_postcopy(void);
 
-bool migrate_release_ram(void);
-bool migrate_postcopy_ram(void);
-bool migrate_zero_blocks(void);
-bool migrate_dirty_bitmaps(void);
-bool migrate_ignore_shared(void);
-bool migrate_validate_uuid(void);
-
-bool migrate_auto_converge(void);
 bool migrate_use_multifd(void);
-bool migrate_pause_before_switchover(void);
 int migrate_multifd_channels(void);
 MultiFDCompression migrate_multifd_compression(void);
 int migrate_multifd_zlib_level(void);
@@ -487,9 +478,6 @@ int migrate_compress_threads(void);
 int migrate_compress_wait_thread(void);
 int migrate_decompress_threads(void);
 bool migrate_use_events(void);
-bool migrate_postcopy_blocktime(void);
-bool migrate_background_snapshot(void);
-bool migrate_postcopy_preempt(void);
 
 /* Sending on the return path - generic and then for each message type */
 void migrate_send_rp_shut(MigrationIncomingState *mis,

migration/options.c

@@ -0,0 +1,124 @@
+/*
+ * QEMU migration capabilities
+ *
+ * Copyright (c) 2012-2023 Red Hat Inc
+ *
+ * Authors:
+ *   Orit Wasserman <owasserm@redhat.com>
+ *   Juan Quintela <quintela@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "migration.h"
+#include "options.h"
+
+bool migrate_auto_converge(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return s->capabilities[MIGRATION_CAPABILITY_AUTO_CONVERGE];
+}
+
+bool migrate_background_snapshot(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return s->capabilities[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT];
+}
+
+bool migrate_dirty_bitmaps(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return s->capabilities[MIGRATION_CAPABILITY_DIRTY_BITMAPS];
+}
+
+bool migrate_ignore_shared(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return s->capabilities[MIGRATION_CAPABILITY_X_IGNORE_SHARED];
+}
+
+bool migrate_late_block_activate(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return s->capabilities[MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE];
+}
+
+bool migrate_pause_before_switchover(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return s->capabilities[MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER];
+}
+
+bool migrate_postcopy_blocktime(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME];
+}
+
+bool migrate_postcopy_preempt(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT];
+}
+
+bool migrate_postcopy_ram(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return s->capabilities[MIGRATION_CAPABILITY_POSTCOPY_RAM];
+}
+
+bool migrate_release_ram(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return s->capabilities[MIGRATION_CAPABILITY_RELEASE_RAM];
+}
+
+bool migrate_validate_uuid(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return s->capabilities[MIGRATION_CAPABILITY_VALIDATE_UUID];
+}
+
+bool migrate_zero_blocks(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return s->capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS];
+}

migration/options.h

@@ -0,0 +1,32 @@
+/*
+ * QEMU migration capabilities
+ *
+ * Copyright (c) 2012-2023 Red Hat Inc
+ *
+ * Authors:
+ *   Orit Wasserman <owasserm@redhat.com>
+ *   Juan Quintela <quintela@redhat.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef QEMU_MIGRATION_OPTIONS_H
+#define QEMU_MIGRATION_OPTIONS_H
+
+/* capabilities */
+
+bool migrate_auto_converge(void);
+bool migrate_background_snapshot(void);
+bool migrate_dirty_bitmaps(void);
+bool migrate_ignore_shared(void);
+bool migrate_late_block_activate(void);
+bool migrate_pause_before_switchover(void);
+bool migrate_postcopy_blocktime(void);
+bool migrate_postcopy_preempt(void);
+bool migrate_postcopy_ram(void);
+bool migrate_release_ram(void);
+bool migrate_validate_uuid(void);
+bool migrate_zero_blocks(void);
+
+#endif

migration/postcopy-ram.c

@@ -37,6 +37,7 @@
 #include "tls.h"
 #include "qemu/userfaultfd.h"
 #include "qemu/mmap-alloc.h"
+#include "options.h"
 
 /* Arbitrary limit on size of each discard command,
  * keeps them around ~200 bytes

migration/ram.c

@@ -57,6 +57,7 @@
 #include "qemu/iov.h"
 #include "multifd.h"
 #include "sysemu/runstate.h"
+#include "options.h"
 
 #include "hw/boards.h" /* for machine_dump_guest_core() */
 

migration/savevm.c

@@ -67,6 +67,7 @@
 #include "qemu/yank.h"
 #include "yank_functions.h"
 #include "sysemu/qtest.h"
+#include "options.h"
 
 const unsigned int postcopy_ram_discard_version;
 

migration/socket.c

@@ -27,6 +27,7 @@
 #include "io/net-listener.h"
 #include "trace.h"
 #include "postcopy-ram.h"
+#include "options.h"
 
 struct SocketOutgoingArgs {
     SocketAddress *saddr;