qemu-kvm/kvm-migration-Add-migrate_use_tls-helper.patch

From a7c6bc008fe006f005d5c15d3f883572ad5defc5 Mon Sep 17 00:00:00 2001
From: Leonardo Bras <leobras@redhat.com>
Date: Wed, 18 May 2022 02:52:25 -0300
Subject: [PATCH 20/37] migration: Add migrate_use_tls() helper
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RH-Author: Leonardo Brás <leobras@redhat.com>
RH-MergeRequest: 191: MSG_ZEROCOPY + Multifd @ rhel8.7
RH-Commit: [20/26] 02afc2e60f1abbf6db45d83e54a18b66dad52426
RH-Bugzilla: 2072049
RH-Acked-by: Peter Xu <peterx@redhat.com>
RH-Acked-by: Daniel P. Berrangé <berrange@redhat.com>
RH-Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

A lot of places check parameters.tls_creds in order to evaluate if TLS is
in use, and sometimes call migrate_get_current() just for that test.

Add new helper function migrate_use_tls() in order to simplify testing
for TLS usage.

Signed-off-by: Leonardo Bras <leobras@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20220513062836.965425-6-leobras@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
(cherry picked from commit d2fafb6a6814a8998607d0baf691265032996a0f)
Signed-off-by: Leonardo Bras <leobras@redhat.com>
---
 migration/channel.c   | 3 +--
 migration/migration.c | 9 +++++++++
 migration/migration.h | 1 +
 migration/multifd.c   | 5 +----
 4 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/migration/channel.c b/migration/channel.c
index c4fc000a1a..086b5c0d8b 100644
--- a/migration/channel.c
+++ b/migration/channel.c
@@ -38,8 +38,7 @@ void migration_channel_process_incoming(QIOChannel *ioc)
     trace_migration_set_incoming_channel(
         ioc, object_get_typename(OBJECT(ioc)));
 
-    if (s->parameters.tls_creds &&
-        *s->parameters.tls_creds &&
+    if (migrate_use_tls() &&
         !object_dynamic_cast(OBJECT(ioc),
                              TYPE_QIO_CHANNEL_TLS)) {
         migration_tls_channel_process_incoming(s, ioc, &local_err);
diff --git a/migration/migration.c b/migration/migration.c
index b0fc3f68bd..8e28f2ee41 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -2568,6 +2568,15 @@ bool migrate_use_zero_copy_send(void)
 }
 #endif
 
+int migrate_use_tls(void)
+{
+    MigrationState *s;
+
+    s = migrate_get_current();
+
+    return s->parameters.tls_creds && *s->parameters.tls_creds;
+}
+
 int migrate_use_xbzrle(void)
 {
     MigrationState *s;
diff --git a/migration/migration.h b/migration/migration.h
index 908098939f..9396b7e90a 100644
--- a/migration/migration.h
+++ b/migration/migration.h
@@ -344,6 +344,7 @@ bool migrate_use_zero_copy_send(void);
 #else
 #define migrate_use_zero_copy_send() (false)
 #endif
+int migrate_use_tls(void);
 int migrate_use_xbzrle(void);
 uint64_t migrate_xbzrle_cache_size(void);
 bool migrate_colo_enabled(void);
diff --git a/migration/multifd.c b/migration/multifd.c
index 3725226400..e53811f04a 100644
--- a/migration/multifd.c
+++ b/migration/multifd.c
@@ -789,14 +789,11 @@ static bool multifd_channel_connect(MultiFDSendParams *p,
                                     QIOChannel *ioc,
                                     Error *error)
 {
-    MigrationState *s = migrate_get_current();
-
     trace_multifd_set_outgoing_channel(
         ioc, object_get_typename(OBJECT(ioc)), p->tls_hostname, error);
 
     if (!error) {
-        if (s->parameters.tls_creds &&
-            *s->parameters.tls_creds &&
+        if (migrate_use_tls() &&
             !object_dynamic_cast(OBJECT(ioc),
                                  TYPE_QIO_CHANNEL_TLS)) {
             multifd_tls_channel_connect(p, ioc, &error);
-- 
2.35.3