[Qemu-devel] [PATCH 1/2] migration: Allow migrate_fd_connect to take an Error *

["Dr. David Alan Gilbert (git)" <dgilbert@redhat.com>]

From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Allow whatever is performing the connection to pass migrate_fd_connect
an error to indicate there was a problem during connection, an allow
us to clean up.

The caller must free the error.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 migration/channel.c   | 2 +-
 migration/migration.c | 7 ++++++-
 migration/migration.h | 2 +-
 migration/rdma.c      | 2 +-
 4 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/migration/channel.c b/migration/channel.c
index 70ec7ea3b7..fdb7ddbd17 100644
--- a/migration/channel.c
+++ b/migration/channel.c
@@ -78,6 +78,6 @@ void migration_channel_connect(MigrationState *s,
 
         s->to_dst_file = f;
 
-        migrate_fd_connect(s);
+        migrate_fd_connect(s, NULL);
     }
 }
diff --git a/migration/migration.c b/migration/migration.c
index 4de3b551fe..10a4260f27 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -2333,10 +2333,15 @@ static void *migration_thread(void *opaque)
     return NULL;
 }
 
-void migrate_fd_connect(MigrationState *s)
+void migrate_fd_connect(MigrationState *s, Error *error_in)
 {
     s->expected_downtime = s->parameters.downtime_limit;
     s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s);
+    if (error_in) {
+        migrate_fd_error(s, error_in);
+        migrate_fd_cleanup(s);
+        return;
+    }
 
     qemu_file_set_blocking(s->to_dst_file, true);
     qemu_file_set_rate_limit(s->to_dst_file,
diff --git a/migration/migration.h b/migration/migration.h
index 663415fe48..e67e5e87c2 100644
--- a/migration/migration.h
+++ b/migration/migration.h
@@ -168,7 +168,7 @@ uint64_t migrate_max_downtime(void);
 void migrate_set_error(MigrationState *s, const Error *error);
 void migrate_fd_error(MigrationState *s, const Error *error);
 
-void migrate_fd_connect(MigrationState *s);
+void migrate_fd_connect(MigrationState *s, Error *error_in);
 
 MigrationState *migrate_init(void);
 bool migration_is_blocked(Error **errp);
diff --git a/migration/rdma.c b/migration/rdma.c
index ca56594328..cc7049c594 100644
--- a/migration/rdma.c
+++ b/migration/rdma.c
@@ -3758,7 +3758,7 @@ void rdma_start_outgoing_migration(void *opaque,
     trace_rdma_start_outgoing_migration_after_rdma_connect();
 
     s->to_dst_file = qemu_fopen_rdma(rdma, "wb");
-    migrate_fd_connect(s);
+    migrate_fd_connect(s, NULL);
     return;
 err:
     g_free(rdma);
-- 
2.14.3