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[Qemu-devel] [PATCH v9 08/10] Add migration capabilites


From: Orit Wasserman
Subject: [Qemu-devel] [PATCH v9 08/10] Add migration capabilites
Date: Wed, 11 Apr 2012 21:49:11 +0300

Add migration capabiltes that can be queried by the management.
The managment can query to source and the destination in order to
verify both support some maigration capability (currently only XBZRLE).

Signed-off-by: Orit Wasserman <address@hidden>
---
 hmp.c            |   18 ++++++++++++++++++
 hmp.h            |    1 +
 migration.c      |   11 +++++++++++
 monitor.c        |    7 +++++++
 qapi-schema.json |   24 ++++++++++++++++++++++++
 qmp-commands.hx  |   24 ++++++++++++++++++++++++
 savevm.c         |    2 +-
 7 files changed, 86 insertions(+), 1 deletions(-)

diff --git a/hmp.c b/hmp.c
index 891cac6..d681bfc 100644
--- a/hmp.c
+++ b/hmp.c
@@ -156,6 +156,24 @@ void hmp_info_migrate(Monitor *mon)
     qapi_free_MigrationInfo(info);
 }
 
+void hmp_info_migration_caps(Monitor *mon)
+{
+    MigrationCapList *caps_list, *cap;
+
+    caps_list = qmp_query_migration_caps(NULL);
+    if (!caps_list) {
+        monitor_printf(mon, "No migration capabilities found\n");
+        return;
+    }
+
+    for (cap = caps_list; cap; cap = cap->next) {
+        monitor_printf(mon, "%s\n", cap->value->name);
+    }
+
+    qapi_free_MigrationCapList(caps_list);
+
+}
+
 void hmp_info_cpus(Monitor *mon)
 {
     CpuInfoList *cpu_list, *cpu;
diff --git a/hmp.h b/hmp.h
index 443b812..868bfb3 100644
--- a/hmp.h
+++ b/hmp.h
@@ -25,6 +25,7 @@ void hmp_info_uuid(Monitor *mon);
 void hmp_info_chardev(Monitor *mon);
 void hmp_info_mice(Monitor *mon);
 void hmp_info_migrate(Monitor *mon);
+void hmp_info_migration_caps(Monitor *mon);
 void hmp_info_cpus(Monitor *mon);
 void hmp_info_block(Monitor *mon);
 void hmp_info_blockstats(Monitor *mon);
diff --git a/migration.c b/migration.c
index cea75aa..7578163 100644
--- a/migration.c
+++ b/migration.c
@@ -162,6 +162,17 @@ MigrationInfo *qmp_query_migrate(Error **errp)
     return info;
 }
 
+MigrationCapList *qmp_query_migration_caps(Error **errp)
+{
+    MigrationCapList *caps_list = g_malloc0(sizeof(*caps_list));
+
+    caps_list->value = g_malloc(sizeof(*caps_list->value));
+    caps_list->value->name = g_strdup("uleb");
+    caps_list->next = NULL;
+
+    return caps_list;
+}
+
 /* shared migration helpers */
 
 static int migrate_fd_cleanup(MigrationState *s)
diff --git a/monitor.c b/monitor.c
index 8946a10..ff434e0 100644
--- a/monitor.c
+++ b/monitor.c
@@ -2558,6 +2558,13 @@ static mon_cmd_t info_cmds[] = {
         .mhandler.info = hmp_info_migrate,
     },
     {
+        .name       = "migration_caps",
+        .args_type  = "",
+        .params     = "",
+        .help       = "show migration capabilties",
+        .mhandler.info = hmp_info_migration_caps,
+    },
+    {
         .name       = "balloon",
         .args_type  = "",
         .params     = "",
diff --git a/qapi-schema.json b/qapi-schema.json
index 200e4fc..775fe56 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -276,6 +276,30 @@
 { 'command': 'query-migrate', 'returns': 'MigrationInfo' }
 
 ##
+# @MigrationCap
+#
+# Information about current migration capabilites.
+#
+# @xbzrle: true if the current migration supports xbzrle
+#
+# Since: 1.1
+##
+{ 'type': 'MigrationCap',
+  'data': { 'name': 'str'} }
+
+##
+# @query-migration-caps
+#
+# Returns information about current migration process capabilties.
+#
+# Returns: @MigrationCap
+#
+# Since: 1.1
+##
+{ 'command': 'query-migration-caps', 'returns': ['MigrationCap'] }
+
+
+##
 # @MouseInfo:
 #
 # Information about a mouse device.
diff --git a/qmp-commands.hx b/qmp-commands.hx
index f7a48de..b994951 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -2070,6 +2070,30 @@ EQMP
     },
 
 SQMP
+query-migration-caps
+-------
+
+Query migration capabilties
+
+- "xbzrle": xbzrle support
+
+Arguments:
+
+Example:
+
+-> { "execute": "query-migration-caps"}
+<- { "return": { "xbzrle" : true } }
+
+EQMP
+
+    {
+        .name       = "query_migration_caps",
+        .args_type  = "",
+       .mhandler.cmd_new = qmp_marshal_input_query_migration_caps,
+    },
+
+
+SQMP
 query-balloon
 -------------
 
diff --git a/savevm.c b/savevm.c
index fbf1903..3c0b7cc 100644
--- a/savevm.c
+++ b/savevm.c
@@ -1573,7 +1573,7 @@ int qemu_savevm_state_begin(QEMUFile *f,
        }
         se->set_params(params, se->opaque);
     }
-    
+
     qemu_put_be32(f, QEMU_VM_FILE_MAGIC);
     qemu_put_be32(f, QEMU_VM_FILE_VERSION);
 
-- 
1.7.7.6




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