Signed-off-by: Wen Congyang <we...@cn.fujitsu.com> Signed-off-by: zhanghailiang <zhang.zhanghaili...@huawei.com> Signed-off-by: Gonglei <arei.gong...@huawei.com> Signed-off-by: Changlong Xie <xiecl.f...@cn.fujitsu.com> --- 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 <we...@cn.fujitsu.com> + * + * 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 <we...@cn.fujitsu.com> + * + * 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