migration: Introduce interface query-migrationthreads

Introduce interface query-migrationthreads. The interface is used
to query information about migration threads and returns with
migration thread's name and its id.
Introduce threadinfo.c to manage threads with migration.

Signed-off-by: Jiang Jiacheng <jiangjiacheng@huawei.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Jiang Jiacheng 2023-02-03 15:35:18 +08:00 committed by Juan Quintela
parent ebfc578715
commit 671326201d
4 changed files with 109 additions and 0 deletions

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@ -26,6 +26,7 @@ softmmu_ss.add(files(
'savevm.c',
'socket.c',
'tls.c',
'threadinfo.c',
), gnutls)
softmmu_ss.add(when: rdma, if_true: files('rdma.c'))

51
migration/threadinfo.c Normal file
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@ -0,0 +1,51 @@
/*
* Migration Threads info
*
* Copyright (c) 2022 HUAWEI TECHNOLOGIES CO., LTD.
*
* Authors:
* Jiang Jiacheng <jiangjiacheng@huawei.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 "threadinfo.h"
static QLIST_HEAD(, MigrationThread) migration_threads;
MigrationThread *MigrationThreadAdd(const char *name, int thread_id)
{
MigrationThread *thread = g_new0(MigrationThread, 1);
thread->name = name;
thread->thread_id = thread_id;
QLIST_INSERT_HEAD(&migration_threads, thread, node);
return thread;
}
void MigrationThreadDel(MigrationThread *thread)
{
if (thread) {
QLIST_REMOVE(thread, node);
g_free(thread);
}
}
MigrationThreadInfoList *qmp_query_migrationthreads(Error **errp)
{
MigrationThreadInfoList *head = NULL;
MigrationThreadInfoList **tail = &head;
MigrationThread *thread = NULL;
QLIST_FOREACH(thread, &migration_threads, node) {
MigrationThreadInfo *info = g_new0(MigrationThreadInfo, 1);
info->name = g_strdup(thread->name);
info->thread_id = thread->thread_id;
QAPI_LIST_APPEND(tail, info);
}
return head;
}

28
migration/threadinfo.h Normal file
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@ -0,0 +1,28 @@
/*
* Migration Threads info
*
* Copyright (c) 2022 HUAWEI TECHNOLOGIES CO., LTD.
*
* Authors:
* Jiang Jiacheng <jiangjiacheng@huawei.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 "qemu/queue.h"
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qapi/qapi-commands-migration.h"
typedef struct MigrationThread MigrationThread;
struct MigrationThread {
const char *name; /* the name of migration thread */
int thread_id; /* ID of the underlying host thread */
QLIST_ENTRY(MigrationThread) node;
};
MigrationThread *MigrationThreadAdd(const char *name, int thread_id);
void MigrationThreadDel(MigrationThread *info);

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@ -1958,6 +1958,35 @@
{ 'command': 'query-vcpu-dirty-limit',
'returns': [ 'DirtyLimitInfo' ] }
##
# @MigrationThreadInfo:
#
# Information about migrationthreads
#
# @name: the name of migration thread
#
# @thread-id: ID of the underlying host thread
#
# Since: 7.2
##
{ 'struct': 'MigrationThreadInfo',
'data': {'name': 'str',
'thread-id': 'int'} }
##
# @query-migrationthreads:
#
# Returns information of migration threads
#
# data: migration thread name
#
# returns: information about migration threads
#
# Since: 7.2
##
{ 'command': 'query-migrationthreads',
'returns': ['MigrationThreadInfo'] }
##
# @snapshot-save:
#