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[Qemu-block] [PATCH v15 7/9] Introduce new APIs to do replication operat
From: |
Changlong Xie |
Subject: |
[Qemu-block] [PATCH v15 7/9] Introduce new APIs to do replication operation |
Date: |
Fri, 5 Feb 2016 12:18:06 +0800 |
Signed-off-by: Wen Congyang <address@hidden>
Signed-off-by: zhanghailiang <address@hidden>
Signed-off-by: Gonglei <address@hidden>
Signed-off-by: Changlong Xie <address@hidden>
---
Makefile.objs | 1 +
qapi/block-core.json | 13 ++++++++
replication.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++++++++
replication.h | 53 +++++++++++++++++++++++++++++
4 files changed, 161 insertions(+)
create mode 100644 replication.c
create mode 100644 replication.h
diff --git a/Makefile.objs b/Makefile.objs
index 06b95c7..a8c74b7 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -15,6 +15,7 @@ block-obj-$(CONFIG_POSIX) += aio-posix.o
block-obj-$(CONFIG_WIN32) += aio-win32.o
block-obj-y += block/
block-obj-y += qemu-io-cmds.o
+block-obj-y += replication.o
block-obj-m = block/
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 7e9e8fe..12362b8 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -2002,6 +2002,19 @@
'*read-pattern': 'QuorumReadPattern' } }
##
+# @ReplicationMode
+#
+# An enumeration of replication modes.
+#
+# @primary: Primary mode, the vm's state will be sent to secondary QEMU.
+#
+# @secondary: Secondary mode, receive the vm's state from primary QEMU.
+#
+# Since: 2.6
+##
+{ 'enum' : 'ReplicationMode', 'data' : [ 'primary', 'secondary' ] }
+
+##
# @BlockdevOptions
#
# Options for creating a block device.
diff --git a/replication.c b/replication.c
new file mode 100644
index 0000000..e8ac2f0
--- /dev/null
+++ b/replication.c
@@ -0,0 +1,94 @@
+/*
+ * Replication filter
+ *
+ * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
+ * Copyright (c) 2016 Intel Corporation
+ * Copyright (c) 2016 FUJITSU LIMITED
+ *
+ * Author:
+ * Wen Congyang <address@hidden>
+ *
+ * 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 "replication.h"
+
+static QLIST_HEAD(, ReplicationState) replication_states;
+
+ReplicationState *replication_new(void *opaque, ReplicationOps *ops)
+{
+ ReplicationState *rs;
+
+ rs = g_new0(ReplicationState, 1);
+ rs->opaque = opaque;
+ rs->ops = ops;
+ QLIST_INSERT_HEAD(&replication_states, rs, node);
+
+ return rs;
+}
+
+void replication_remove(ReplicationState *rs)
+{
+ QLIST_REMOVE(rs, node);
+ g_free(rs);
+}
+
+/*
+ * The caller of the function *MUST* make sure vm stopped
+ */
+void replication_start_all(ReplicationMode mode, Error **errp)
+{
+ ReplicationState *rs, *next;
+
+ QLIST_FOREACH_SAFE(rs, &replication_states, node, next) {
+ if (rs->ops && rs->ops->start) {
+ rs->ops->start(rs, mode, errp);
+ }
+ if (*errp != NULL) {
+ return;
+ }
+ }
+}
+
+void replication_do_checkpoint_all(Error **errp)
+{
+ ReplicationState *rs, *next;
+
+ QLIST_FOREACH_SAFE(rs, &replication_states, node, next) {
+ if (rs->ops && rs->ops->checkpoint) {
+ rs->ops->checkpoint(rs, errp);
+ }
+ if (*errp != NULL) {
+ return;
+ }
+ }
+}
+
+void replication_get_error_all(Error **errp)
+{
+ ReplicationState *rs, *next;
+
+ QLIST_FOREACH_SAFE(rs, &replication_states, node, next) {
+ if (rs->ops && rs->ops->get_error) {
+ rs->ops->get_error(rs, errp);
+ }
+ if (*errp != NULL) {
+ return;
+ }
+ }
+}
+
+void replication_stop_all(bool failover, Error **errp)
+{
+ ReplicationState *rs, *next;
+
+ QLIST_FOREACH_SAFE(rs, &replication_states, node, next) {
+ if (rs->ops && rs->ops->stop) {
+ rs->ops->stop(rs, failover, errp);
+ }
+ if (*errp != NULL) {
+ return;
+ }
+ }
+}
diff --git a/replication.h b/replication.h
new file mode 100644
index 0000000..faea649
--- /dev/null
+++ b/replication.h
@@ -0,0 +1,53 @@
+/*
+ * Replication filter
+ *
+ * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
+ * Copyright (c) 2016 Intel Corporation
+ * Copyright (c) 2016 FUJITSU LIMITED
+ *
+ * Author:
+ * Wen Congyang <address@hidden>
+ *
+ * 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 REPLICATION_H
+#define REPLICATION_H
+
+#include "sysemu/sysemu.h"
+
+typedef struct ReplicationOps ReplicationOps;
+typedef struct ReplicationState ReplicationState;
+typedef void (*Start)(ReplicationState *rs, ReplicationMode mode, Error
**errp);
+typedef void (*Stop)(ReplicationState *rs, bool failover, Error **errp);
+typedef void (*Checkpoint)(ReplicationState *rs, Error **errp);
+typedef void (*GetError)(ReplicationState *rs, Error **errp);
+
+struct ReplicationState {
+ void *opaque;
+ ReplicationOps *ops;
+ QLIST_ENTRY(ReplicationState) node;
+};
+
+struct ReplicationOps{
+ Start start;
+ Checkpoint checkpoint;
+ GetError get_error;
+ Stop stop;
+};
+
+
+ReplicationState *replication_new(void *opaque, ReplicationOps *ops);
+
+void replication_remove(ReplicationState *rs);
+
+void replication_start_all(ReplicationMode mode, Error **errp);
+
+void replication_do_checkpoint_all(Error **errp);
+
+void replication_get_error_all(Error **errp);
+
+void replication_stop_all(bool failover, Error **errp);
+
+#endif /* REPLICATION_H */
--
1.9.3
- [Qemu-block] [PATCH v15 0/9] Block replication for continuous checkpoints, Changlong Xie, 2016/02/04
- [Qemu-block] [PATCH v15 4/9] Link backup into block core, Changlong Xie, 2016/02/04
- [Qemu-block] [PATCH v15 2/9] Store parent BDS in BdrvChild, Changlong Xie, 2016/02/04
- [Qemu-block] [PATCH v15 6/9] auto complete active commit, Changlong Xie, 2016/02/04
- [Qemu-block] [PATCH v15 5/9] docs: block replication's description, Changlong Xie, 2016/02/04
- [Qemu-block] [PATCH v15 1/9] unblock backup operations in backing file, Changlong Xie, 2016/02/04
- [Qemu-block] [PATCH v15 3/9] Backup: clear all bitmap when doing block checkpoint, Changlong Xie, 2016/02/04
- [Qemu-block] [PATCH v15 9/9] support replication driver in blockdev-add, Changlong Xie, 2016/02/04
- [Qemu-block] [PATCH v15 8/9] Implement new driver for block replication, Changlong Xie, 2016/02/04
- [Qemu-block] [PATCH v15 7/9] Introduce new APIs to do replication operation,
Changlong Xie <=
- Re: [Qemu-block] [PATCH v15 7/9] Introduce new APIs to do replication operation, Changlong Xie, 2016/02/14
Re: [Qemu-block] [Qemu-devel] [PATCH v15 0/9] Block replication for continuous checkpoints, Changlong Xie, 2016/02/15
Re: [Qemu-block] [PATCH v15 0/9] Block replication for continuous checkpoints, Hailiang Zhang, 2016/02/17
Re: [Qemu-block] [Qemu-devel] [PATCH v15 0/9] Block replication for continuous checkpoints, Changlong Xie, 2016/02/23