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[Qemu-devel] [PATCH 01/11] Add migration capabilities
From: |
Juan Quintela |
Subject: |
[Qemu-devel] [PATCH 01/11] Add migration capabilities |
Date: |
Tue, 24 Jul 2012 20:19:14 +0200 |
From: Orit Wasserman <address@hidden>
Add migration capabilities that can be queried by the management.
The management can query the source QEMU and the destination QEMU in order to
verify both support some migration capability (currently only XBZRLE).
Signed-off-by: Orit Wasserman <address@hidden>
Signed-off-by: Juan Quintela <address@hidden>
---
hmp-commands.hx | 2 ++
hmp.c | 19 +++++++++++++++++++
hmp.h | 1 +
migration.c | 11 +++++++++++
monitor.c | 7 +++++++
qapi-schema.json | 39 +++++++++++++++++++++++++++++++++++++++
qmp-commands.hx | 24 ++++++++++++++++++++++++
7 files changed, 103 insertions(+)
diff --git a/hmp-commands.hx b/hmp-commands.hx
index eea8b32..8786148 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1417,6 +1417,8 @@ show CPU statistics
show user network stack connection states
@item info migrate
show migration status
address@hidden info migration_capabilities
+show migration capabilities
@item info balloon
show balloon information
@item info qtree
diff --git a/hmp.c b/hmp.c
index 6b72a64..5c7d0be 100644
--- a/hmp.c
+++ b/hmp.c
@@ -161,6 +161,25 @@ void hmp_info_migrate(Monitor *mon)
qapi_free_MigrationInfo(info);
}
+void hmp_info_migration_capabilities(Monitor *mon)
+{
+ MigrationCapabilityStatusList *caps_list, *cap;
+
+ caps_list = qmp_query_migration_capabilities(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: %s ",
+ MigrationCapability_lookup[cap->value->capability],
+ cap->value->state ? "on" : "off");
+ }
+
+ qapi_free_MigrationCapabilityStatusList(caps_list);
+}
+
void hmp_info_cpus(Monitor *mon)
{
CpuInfoList *cpu_list, *cpu;
diff --git a/hmp.h b/hmp.h
index 8d2b0d7..2fb44ca 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_capabilities(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 8db1b43..8c27347 100644
--- a/migration.c
+++ b/migration.c
@@ -166,6 +166,17 @@ MigrationInfo *qmp_query_migrate(Error **errp)
return info;
}
+MigrationCapabilityStatusList *qmp_query_migration_capabilities(Error **errp)
+{
+ MigrationCapabilityStatusList *caps_list = g_malloc0(sizeof(*caps_list));
+
+ caps_list->value = g_malloc(sizeof(*caps_list->value));
+ caps_list->value->capability = MIGRATION_CAPABILITY_XBZRLE;
+ 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 49dccfe..1d3f721 100644
--- a/monitor.c
+++ b/monitor.c
@@ -2655,6 +2655,13 @@ static mon_cmd_t info_cmds[] = {
.mhandler.info = hmp_info_migrate,
},
{
+ .name = "migration-capabilities",
+ .args_type = "",
+ .params = "",
+ .help = "show migration capabilities",
+ .mhandler.info = hmp_info_migration_capabilities,
+ },
+ {
.name = "balloon",
.args_type = "",
.params = "",
diff --git a/qapi-schema.json b/qapi-schema.json
index bc55ed2..eddb32d 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -306,6 +306,45 @@
{ 'command': 'query-migrate', 'returns': 'MigrationInfo' }
##
+# @MigrationCapability
+#
+# Migration capabilities enumeration
+#
+# @xbzrle: Migration supports xbzrle (Xor Based Zero Length Encoding).
+# This feature allows us to minimize migration traffic for certain
work
+# loads, by sending compressed difference of the pages
+#
+# Since: 1.2
+##
+{ 'enum': 'MigrationCapability',
+ 'data': ['xbzrle'] }
+
+##
+# @MigrationCapabilityStatus
+#
+# Migration capability information
+#
+# @capability: capability enum
+#
+# @state: capability state bool
+#
+# Since: 1.2
+##
+{ 'type': 'MigrationCapabilityStatus',
+ 'data': { 'capability' : 'MigrationCapability', 'state' : 'bool' } }
+
+##
+# @query-migration-capabilities
+#
+# Returns information about current migration process capabilties.
+#
+# Returns: @MigrationCapabilityStatus list
+#
+# Since: 1.2
+##
+{ 'command': 'query-migration-capabilities', 'returns':
['MigrationCapabilityStatus'] }
+
+##
# @MouseInfo:
#
# Information about a mouse device.
diff --git a/qmp-commands.hx b/qmp-commands.hx
index e3cf3c5..c0ed14c 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -2141,6 +2141,30 @@ EQMP
},
SQMP
+query-migration-capabilities
+-------
+
+Query migration capabilities
+
+- "xbzrle": xbzrle support
+
+Arguments:
+
+Example:
+
+-> { "execute": "query-migration-capabilities"}
+<- { "return": [ { "capability": "xbzrle", "state": true },
+ { "capability": "foobar", "state": false } ] }
+
+EQMP
+
+ {
+ .name = "query-migration-capabilities",
+ .args_type = "",
+ .mhandler.cmd_new = qmp_marshal_input_query_migration_capabilities,
+ },
+
+SQMP
query-balloon
-------------
--
1.7.10.4
- [Qemu-devel] [PATCH 00/11] Migration next v5, Juan Quintela, 2012/07/24
- [Qemu-devel] [PATCH 01/11] Add migration capabilities,
Juan Quintela <=
- [Qemu-devel] [PATCH 02/11] Add migrate_set_parameter command, Juan Quintela, 2012/07/24
- [Qemu-devel] [PATCH 03/11] Add XBZRLE documentation, Juan Quintela, 2012/07/24
- [Qemu-devel] [PATCH 06/11] Add xbzrle_encode_buffer and xbzrle_decode_buffer functions, Juan Quintela, 2012/07/24
- [Qemu-devel] [PATCH 05/11] Add uleb encoding/decoding functions, Juan Quintela, 2012/07/24
- [Qemu-devel] [PATCH 04/11] Add cache handling functions, Juan Quintela, 2012/07/24
- [Qemu-devel] [PATCH 07/11] Add XBZRLE to ram_save_block and ram_save_live, Juan Quintela, 2012/07/24
- [Qemu-devel] [PATCH 08/11] Add migrate_set_cachesize command, Juan Quintela, 2012/07/24
- [Qemu-devel] [PATCH 11/11] Restart optimization on stage3 update version, Juan Quintela, 2012/07/24
- [Qemu-devel] [PATCH 09/11] Add migration accounting for normal and duplicate pages, Juan Quintela, 2012/07/24
- [Qemu-devel] [PATCH 10/11] Add XBZRLE statistics, Juan Quintela, 2012/07/24