[PATCH V4 10/19] migration: cpr channel

[Steve Sistare <steven.sistare@oracle.com>]

Add the 'cpr' channel type, and stash the incoming cpr channel for use
in a subsequent patch.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
---
 include/migration/cpr.h |  3 +++
 migration/cpr.c         | 15 +++++++++++++++
 qapi/migration.json     |  3 ++-
 system/vl.c             |  6 ++++++
 4 files changed, 26 insertions(+), 1 deletion(-)

diff --git a/include/migration/cpr.h b/include/migration/cpr.h
index 201d66d..e833fae 100644
--- a/include/migration/cpr.h
+++ b/include/migration/cpr.h
@@ -17,6 +17,9 @@ void cpr_save_fd(const char *name, int id, int fd);
 void cpr_delete_fd(const char *name, int id);
 int cpr_find_fd(const char *name, int id);
 
+void cpr_set_cpr_channel(MigrationChannel *channel);
+MigrationChannel *cpr_get_cpr_channel(void);
+
 int cpr_state_save(MigrationChannel *channel, Error **errp);
 int cpr_state_load(Error **errp);
 void cpr_state_close(void);
diff --git a/migration/cpr.c b/migration/cpr.c
index 1e2878c..f4a795f 100644
--- a/migration/cpr.c
+++ b/migration/cpr.c
@@ -116,6 +116,21 @@ QIOChannel *cpr_state_ioc(void)
     return qemu_file_get_ioc(cpr_state_file);
 }
 
+static MigrationChannel *cpr_channel;
+
+void cpr_set_cpr_channel(MigrationChannel *channel)
+{
+    if (cpr_channel) {
+        qapi_free_MigrationChannel(cpr_channel);
+    }
+    cpr_channel = channel;
+}
+
+MigrationChannel *cpr_get_cpr_channel(void)
+{
+    return cpr_channel;
+}
+
 int cpr_state_save(MigrationChannel *channel, Error **errp)
 {
     int ret;
diff --git a/qapi/migration.json b/qapi/migration.json
index a605dc2..a26960b 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -1578,11 +1578,12 @@
 # The migration channel-type request options.
 #
 # @main: Main outbound migration channel.
+# @cpr: cpr state channel.
 #
 # Since: 8.1
 ##
 { 'enum': 'MigrationChannelType',
-  'data': [ 'main' ] }
+  'data': [ 'main', 'cpr' ] }
 
 ##
 # @MigrationChannel:
diff --git a/system/vl.c b/system/vl.c
index 2c24c60..40e049e 100644
--- a/system/vl.c
+++ b/system/vl.c
@@ -77,6 +77,7 @@
 #include "hw/block/block.h"
 #include "hw/i386/x86.h"
 #include "hw/i386/pc.h"
+#include "migration/cpr.h"
 #include "migration/misc.h"
 #include "migration/snapshot.h"
 #include "sysemu/tpm.h"
@@ -1834,6 +1835,11 @@ static void incoming_option_parse(const char *str)
         qobject_unref(obj);
         visit_type_MigrationChannel(v, "channel", &channel, &error_fatal);
         visit_free(v);
+
+        if (channel->channel_type == MIGRATION_CHANNEL_TYPE_CPR) {
+            cpr_set_cpr_channel(channel);
+            return;
+        }
     } else if (!strcmp(str, "defer")) {
         channel = NULL;
     } else {
-- 
1.8.3.1