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[Qemu-devel] [PATCH COLO-Frame v11 02/39] migration: Introduce capabilit
From: |
zhanghailiang |
Subject: |
[Qemu-devel] [PATCH COLO-Frame v11 02/39] migration: Introduce capability 'x-colo' to migration |
Date: |
Tue, 24 Nov 2015 17:25:12 +0800 |
We add helper function colo_supported() to indicate whether
colo is supported or not, with which we use to control whether or not
showing 'x-colo' string to users, they can use qmp command
'query-migrate-capabilities' or hmp command 'info migrate_capabilities'
to learn if colo is supported.
Cc: Juan Quintela <address@hidden>
Cc: Amit Shah <address@hidden>
Cc: Eric Blake <address@hidden>
Cc: Markus Armbruster <address@hidden>
Signed-off-by: zhanghailiang <address@hidden>
Signed-off-by: Li Zhijian <address@hidden>
Signed-off-by: Gonglei <address@hidden>
Reviewed-by: Eric Blake <address@hidden>
---
v10:
- Rename capability 'colo' to experimental 'x-colo' (Eric's suggestion).
- Rename migrate_enable_colo() to migrate_colo_enabled() (Eric's suggestion).
---
include/migration/colo.h | 20 ++++++++++++++++++++
include/migration/migration.h | 1 +
migration/Makefile.objs | 1 +
migration/colo.c | 18 ++++++++++++++++++
migration/migration.c | 17 +++++++++++++++++
qapi-schema.json | 6 +++++-
qmp-commands.hx | 1 +
stubs/Makefile.objs | 1 +
stubs/migration-colo.c | 18 ++++++++++++++++++
9 files changed, 82 insertions(+), 1 deletion(-)
create mode 100644 include/migration/colo.h
create mode 100644 migration/colo.c
create mode 100644 stubs/migration-colo.c
diff --git a/include/migration/colo.h b/include/migration/colo.h
new file mode 100644
index 0000000..c60a590
--- /dev/null
+++ b/include/migration/colo.h
@@ -0,0 +1,20 @@
+/*
+ * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
+ * (a.k.a. Fault Tolerance or Continuous Replication)
+ *
+ * Copyright (c) 2015 HUAWEI TECHNOLOGIES CO., LTD.
+ * Copyright (c) 2015 FUJITSU LIMITED
+ * Copyright (c) 2015 Intel Corporation
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later. See the COPYING file in the top-level directory.
+ */
+
+#ifndef QEMU_COLO_H
+#define QEMU_COLO_H
+
+#include "qemu-common.h"
+
+bool colo_supported(void);
+
+#endif
diff --git a/include/migration/migration.h b/include/migration/migration.h
index fd018b7..1f004e4 100644
--- a/include/migration/migration.h
+++ b/include/migration/migration.h
@@ -268,6 +268,7 @@ int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t
*dst, int dlen);
int migrate_use_xbzrle(void);
int64_t migrate_xbzrle_cache_size(void);
+bool migrate_colo_enabled(void);
int64_t xbzrle_cache_resize(int64_t new_size);
diff --git a/migration/Makefile.objs b/migration/Makefile.objs
index 0cac6d7..65ecc35 100644
--- a/migration/Makefile.objs
+++ b/migration/Makefile.objs
@@ -1,4 +1,5 @@
common-obj-y += migration.o tcp.o
+common-obj-$(CONFIG_COLO) += colo.o
common-obj-y += vmstate.o
common-obj-y += qemu-file.o qemu-file-buf.o qemu-file-unix.o qemu-file-stdio.o
common-obj-y += xbzrle.o postcopy-ram.o
diff --git a/migration/colo.c b/migration/colo.c
new file mode 100644
index 0000000..2c40d2e
--- /dev/null
+++ b/migration/colo.c
@@ -0,0 +1,18 @@
+/*
+ * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
+ * (a.k.a. Fault Tolerance or Continuous Replication)
+ *
+ * Copyright (c) 2015 HUAWEI TECHNOLOGIES CO., LTD.
+ * Copyright (c) 2015 FUJITSU LIMITED
+ * Copyright (c) 2015 Intel Corporation
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later. See the COPYING file in the top-level directory.
+ */
+
+#include "migration/colo.h"
+
+bool colo_supported(void)
+{
+ return true;
+}
diff --git a/migration/migration.c b/migration/migration.c
index 1a42aee..efacf52 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -33,6 +33,7 @@
#include "qom/cpu.h"
#include "exec/memory.h"
#include "exec/address-spaces.h"
+#include "migration/colo.h"
#define MAX_THROTTLE (32 << 20) /* Migration transfer speed throttling */
@@ -480,6 +481,9 @@ MigrationCapabilityStatusList
*qmp_query_migrate_capabilities(Error **errp)
caps = NULL; /* silence compiler warning */
for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) {
+ if (i == MIGRATION_CAPABILITY_X_COLO && !colo_supported()) {
+ continue;
+ }
if (head == NULL) {
head = g_malloc0(sizeof(*caps));
caps = head;
@@ -679,6 +683,13 @@ void
qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
}
for (cap = params; cap; cap = cap->next) {
+ if (cap->value->capability == MIGRATION_CAPABILITY_X_COLO &&
+ !colo_supported()) {
+ error_setg(errp, "COLO is not currently supported, please"
+ " configure with --enable-colo option in order to"
+ " support COLO feature");
+ continue;
+ }
s->enabled_capabilities[cap->value->capability] = cap->value->state;
}
@@ -1581,6 +1592,12 @@ fail:
migrate_set_state(s, current_active_state, MIGRATION_STATUS_FAILED);
}
+bool migrate_colo_enabled(void)
+{
+ MigrationState *s = migrate_get_current();
+ return s->enabled_capabilities[MIGRATION_CAPABILITY_X_COLO];
+}
+
/*
* Master migration thread on the source VM.
* It drives the migration and pumps the data down the outgoing channel.
diff --git a/qapi-schema.json b/qapi-schema.json
index 8b1a423..d20c0ec 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -546,11 +546,15 @@
# been migrated, pulling the remaining pages along as needed. NOTE: If
# the migration fails during postcopy the VM will fail. (since 2.5)
#
+# @x-colo: If enabled, migration will never end, and the state of the VM on the
+# primary side will be migrated continuously to the VM on secondary
+# side. (since 2.6)
+#
# Since: 1.2
##
{ 'enum': 'MigrationCapability',
'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
- 'compress', 'events', 'x-postcopy-ram'] }
+ 'compress', 'events', 'x-postcopy-ram', 'x-colo'] }
##
# @MigrationCapabilityStatus
diff --git a/qmp-commands.hx b/qmp-commands.hx
index e209688..92042d8 100644
--- a/qmp-commands.hx
+++ b/qmp-commands.hx
@@ -3625,6 +3625,7 @@ Query current migration capabilities
- "rdma-pin-all" : RDMA Pin Page state (json-bool)
- "auto-converge" : Auto Converge state (json-bool)
- "zero-blocks" : Zero Blocks state (json-bool)
+ - "x-colo" : COarse-Grain LOck Stepping for Non-stop Service
(json-bool)
Arguments:
diff --git a/stubs/Makefile.objs b/stubs/Makefile.objs
index d7898a0..12eb4c6 100644
--- a/stubs/Makefile.objs
+++ b/stubs/Makefile.objs
@@ -38,3 +38,4 @@ stub-obj-y += qmp_pc_dimm_device_list.o
stub-obj-y += target-monitor-defs.o
stub-obj-y += target-get-monitor-def.o
stub-obj-y += vhost.o
+stub-obj-y += migration-colo.o
diff --git a/stubs/migration-colo.c b/stubs/migration-colo.c
new file mode 100644
index 0000000..3d817df
--- /dev/null
+++ b/stubs/migration-colo.c
@@ -0,0 +1,18 @@
+/*
+ * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
+ * (a.k.a. Fault Tolerance or Continuous Replication)
+ *
+ * Copyright (c) 2015 HUAWEI TECHNOLOGIES CO., LTD.
+ * Copyright (c) 2015 FUJITSU LIMITED
+ * Copyright (c) 2015 Intel Corporation
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later. See the COPYING file in the top-level directory.
+ */
+
+#include "migration/colo.h"
+
+bool colo_supported(void)
+{
+ return false;
+}
--
1.8.3.1
- [Qemu-devel] [PATCH COLO-Frame v11 00/39] COarse-grain LOck-stepping(COLO) Virtual Machines for Non-stop Service (FT), zhanghailiang, 2015/11/24
- [Qemu-devel] [PATCH COLO-Frame v11 04/39] migration: Export migrate_set_state(), zhanghailiang, 2015/11/24
- [Qemu-devel] [PATCH COLO-Frame v11 05/39] migration: Add state records for migration incoming, zhanghailiang, 2015/11/24
- [Qemu-devel] [PATCH COLO-Frame v11 02/39] migration: Introduce capability 'x-colo' to migration,
zhanghailiang <=
- [Qemu-devel] [PATCH COLO-Frame v11 20/39] COLO: synchronize PVM's state to SVM periodically, zhanghailiang, 2015/11/24
- [Qemu-devel] [PATCH COLO-Frame v11 28/39] COLO failover: Don't do failover during loading VM's state, zhanghailiang, 2015/11/24
- [Qemu-devel] [PATCH COLO-Frame v11 19/39] COLO: Add checkpoint-delay parameter for migrate-set-parameters, zhanghailiang, 2015/11/24
- [Qemu-devel] [PATCH COLO-Frame v11 30/39] COLO: Update the global runstate after going into colo state, zhanghailiang, 2015/11/24
- [Qemu-devel] [PATCH COLO-Frame v11 32/39] COLO: Separate the process of saving/loading ram and device state, zhanghailiang, 2015/11/24
- [Qemu-devel] [PATCH COLO-Frame v11 38/39] colo: Use default buffer-filter to buffer and release packets, zhanghailiang, 2015/11/24
- [Qemu-devel] [PATCH COLO-Frame v11 09/39] COLO/migration: Create a new communication path from destination to source, zhanghailiang, 2015/11/24