[PULL,7/7] migration: allow enabling mutilfd for specific protocol only

Commit Message

Juan Quintela Sept. 9, 2021, 10:33 a.m. UTC

From: Li Zhijian <[e-mail]>

To: <[e-mail]>, <[e-mail]>, <[e-mail]>
CC: Li Zhijian <[e-mail]>
Date: Sat, 31 Jul 2021 22:05:52 +0800 (5 weeks, 4 days, 17 hours ago)

And change the default to true so that in '-incoming defer' case, user is able
to change multifd capability.

Signed-off-by: Li Zhijian <[e-mail]>
Reviewed-by: Juan Quintela <[e-mail]>
Signed-off-by: Juan Quintela <[e-mail]>
---
 migration/migration.c | 8 ++++++++
 migration/multifd.c   | 2 +-
 2 files changed, 9 insertions(+), 1 deletion(-)

Patch

diff --git a/migration/migration.c b/migration/migration.c
index 10e7616a48..77f9a3cfd3 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -1237,6 +1237,14 @@  static bool migrate_caps_check(bool *cap_list,
         }
     }
 
+    /* incoming side only */
+    if (runstate_check(RUN_STATE_INMIGRATE) &&
+        !migrate_multifd_is_allowed() &&
+        cap_list[MIGRATION_CAPABILITY_MULTIFD]) {
+        error_setg(errp, "multifd is not supported by current protocol");
+        return false;
+    }
+
     return true;
 }
 
diff --git a/migration/multifd.c b/migration/multifd.c
index 283f672bf0..7c9deb1921 100644
--- a/migration/multifd.c
+++ b/migration/multifd.c
@@ -868,7 +868,7 @@  cleanup:
     multifd_new_send_channel_cleanup(p, sioc, local_err);
 }
 
-static bool migrate_allow_multifd;
+static bool migrate_allow_multifd = true;
 void migrate_protocol_allow_multifd(bool allow)
 {
     migrate_allow_multifd = allow;