This is a counterpart to the 'file:' uri support for source migration,
now a file can also serve as the source of an incoming migration.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
---
 migration/file.c      | 15 +++++++++++++++
 migration/file.h      |  1 +
 migration/migration.c |  2 ++
 3 files changed, 18 insertions(+)

diff --git a/migration/file.c b/migration/file.c
index 02896a7cab99..93eb718aa0f4 100644
--- a/migration/file.c
+++ b/migration/file.c
@@ -21,3 +21,18 @@ void file_start_outgoing_migration(MigrationState *s, const char *fname, Error *
 }
 
 
+void file_start_incoming_migration(const char *fname, Error **errp)
+{
+	QIOChannelFile *ioc;
+
+	ioc = qio_channel_file_new_path(fname, O_RDONLY, 0, errp);
+	if (!ioc) {
+		error_report("Error creating a channel");
+		return;
+	}
+
+	qio_channel_set_name(QIO_CHANNEL(ioc), "migration-file-incoming");
+	migration_channel_process_incoming(QIO_CHANNEL(ioc));
+	object_unref(OBJECT(ioc));
+}
+
diff --git a/migration/file.h b/migration/file.h
index d476eb1157f9..cdbd291322d4 100644
--- a/migration/file.h
+++ b/migration/file.h
@@ -5,5 +5,6 @@ void file_start_outgoing_migration(MigrationState *s,
                                    const char *filename,
                                    Error **errp);
 
+void file_start_incoming_migration(const char *fname, Error **errp);
 #endif
 
diff --git a/migration/migration.c b/migration/migration.c
index 8813b78b9a6b..140b0f1a54bd 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -506,6 +506,8 @@ static void qemu_start_incoming_migration(const char *uri, Error **errp)
         exec_start_incoming_migration(p, errp);
     } else if (strstart(uri, "fd:", &p)) {
         fd_start_incoming_migration(p, errp);
+    } else if (strstart(uri, "file:", &p)) {
+	file_start_incoming_migration(p, errp);
     } else {
         error_setg(errp, "unknown migration protocol: %s", uri);
     }
-- 
2.34.1