[PULL 39/40] migration: Implement MigrateChannelList to hmp migration flow.

[Juan Quintela <quintela@redhat.com>]

From: Het Gala <het.gala@nutanix.com>

Integrate MigrateChannelList with all transport backends
(socket, exec and rdma) for both src and dest migration
endpoints for hmp migration.

Suggested-by: Aravind Retnakaran <aravind.retnakaran@nutanix.com>
Signed-off-by: Het Gala <het.gala@nutanix.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Message-ID: <20231023182053.8711-14-farosas@suse.de>
Signed-off-by: Juan Quintela <quintela@redhat.com>
---
 migration/migration.h          |  3 ++-
 migration/migration-hmp-cmds.c | 23 +++++++++++++++++++++--
 migration/migration.c          |  5 ++---
 3 files changed, 25 insertions(+), 6 deletions(-)

diff --git a/migration/migration.h b/migration/migration.h
index af8c965b7f..cf2c9c88e0 100644
--- a/migration/migration.h
+++ b/migration/migration.h
@@ -520,7 +520,8 @@ bool check_dirty_bitmap_mig_alias_map(const BitmapMigrationNodeAliasList *bbm,
                                       Error **errp);
 
 void migrate_add_address(SocketAddress *address);
-
+bool migrate_uri_parse(const char *uri, MigrationChannel **channel,
+                       Error **errp);
 int foreach_not_ignored_block(RAMBlockIterFunc func, void *opaque);
 
 #define qemu_ram_foreach_block \
diff --git a/migration/migration-hmp-cmds.c b/migration/migration-hmp-cmds.c
index 6ec778a990..86ae832176 100644
--- a/migration/migration-hmp-cmds.c
+++ b/migration/migration-hmp-cmds.c
@@ -451,9 +451,18 @@ void hmp_migrate_incoming(Monitor *mon, const QDict *qdict)
 {
     Error *err = NULL;
     const char *uri = qdict_get_str(qdict, "uri");
+    MigrationChannelList *caps = NULL;
+    g_autoptr(MigrationChannel) channel = NULL;
 
-    qmp_migrate_incoming(uri, false, NULL, &err);
+    if (!migrate_uri_parse(uri, &channel, &err)) {
+        goto end;
+    }
+    QAPI_LIST_PREPEND(caps, g_steal_pointer(&channel));
 
+    qmp_migrate_incoming(NULL, true, caps, &err);
+    qapi_free_MigrationChannelList(caps);
+
+end:
     hmp_handle_error(mon, err);
 }
 
@@ -753,6 +762,8 @@ void hmp_migrate(Monitor *mon, const QDict *qdict)
     bool resume = qdict_get_try_bool(qdict, "resume", false);
     const char *uri = qdict_get_str(qdict, "uri");
     Error *err = NULL;
+    MigrationChannelList *caps = NULL;
+    g_autoptr(MigrationChannel) channel = NULL;
 
     if (inc) {
         warn_report("option '-i' is deprecated;"
@@ -764,12 +775,20 @@ void hmp_migrate(Monitor *mon, const QDict *qdict)
                     " use blockdev-mirror with NBD instead");
     }
 
-    qmp_migrate(uri, false, NULL, !!blk, blk, !!inc, inc,
+    if (!migrate_uri_parse(uri, &channel, &err)) {
+        hmp_handle_error(mon, err);
+        return;
+    }
+    QAPI_LIST_PREPEND(caps, g_steal_pointer(&channel));
+
+    qmp_migrate(NULL, true, caps, !!blk, blk, !!inc, inc,
                  false, false, true, resume, &err);
     if (hmp_handle_error(mon, err)) {
         return;
     }
 
+    qapi_free_MigrationChannelList(caps);
+
     if (!detach) {
         HMPMigrationStatus *status;
 
diff --git a/migration/migration.c b/migration/migration.c
index 10a6f2fb12..28a34c9068 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -457,9 +457,8 @@ void migrate_add_address(SocketAddress *address)
                       QAPI_CLONE(SocketAddress, address));
 }
 
-static bool migrate_uri_parse(const char *uri,
-                              MigrationChannel **channel,
-                              Error **errp)
+bool migrate_uri_parse(const char *uri, MigrationChannel **channel,
+                       Error **errp)
 {
     g_autoptr(MigrationChannel) val = g_new0(MigrationChannel, 1);
     g_autoptr(MigrationAddress) addr = g_new0(MigrationAddress, 1);
-- 
2.41.0