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From: Wei Liu <wei.liu2@citrix.com>
To: Xen-devel <xen-devel@lists.xenproject.org>
Cc: Anthony PERARD <anthony.perard@citrix.com>,
	Wei Liu <wei.liu2@citrix.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	Ian Jackson <Ian.Jackson@eu.citrix.com>,
	Jan Beulich <JBeulich@suse.com>
Subject: [PATCH 2/3] libxl: introduce libxl__qmp_query_cpus
Date: Tue, 7 Jun 2016 12:24:01 +0100	[thread overview]
Message-ID: <1465298642-5356-3-git-send-email-wei.liu2@citrix.com> (raw)
In-Reply-To: <1465298642-5356-1-git-send-email-wei.liu2@citrix.com>

It interrogates QEMU for the number of cpus.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
 tools/libxl/libxl_internal.h |  3 +++
 tools/libxl/libxl_qmp.c      | 19 +++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 38ec54d..5c22b97 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -1794,6 +1794,9 @@ _hidden int libxl__qmp_set_global_dirty_log(libxl__gc *gc, int domid, bool enabl
 _hidden int libxl__qmp_insert_cdrom(libxl__gc *gc, int domid, const libxl_device_disk *disk);
 /* Add a virtual CPU */
 _hidden int libxl__qmp_cpu_add(libxl__gc *gc, int domid, int index);
+/* Query the number of CPUs */
+_hidden int libxl__qmp_query_cpus(libxl__gc *gc, int domid,
+                                  unsigned int *count);
 /* Start NBD server */
 _hidden int libxl__qmp_nbd_server_start(libxl__gc *gc, int domid,
                                         const char *host, const char *port);
diff --git a/tools/libxl/libxl_qmp.c b/tools/libxl/libxl_qmp.c
index 3eb279a..b9de867 100644
--- a/tools/libxl/libxl_qmp.c
+++ b/tools/libxl/libxl_qmp.c
@@ -979,6 +979,25 @@ int libxl__qmp_cpu_add(libxl__gc *gc, int domid, int idx)
     return qmp_run_command(gc, domid, "cpu-add", args, NULL, NULL);
 }
 
+static int query_cpus_callback(libxl__qmp_handler *qmp,
+                               const libxl__json_object *response,
+                               void *opaque)
+{
+    unsigned int *count = opaque;
+    GC_INIT(qmp->ctx);
+
+    *count = libxl__json_array_count(response);
+
+    GC_FREE;
+    return 0;
+}
+
+int libxl__qmp_query_cpus(libxl__gc *gc, int domid, unsigned int *count)
+{
+    return qmp_run_command(gc, domid, "query-cpus", NULL,
+                           query_cpus_callback, count);
+}
+
 int libxl__qmp_nbd_server_start(libxl__gc *gc, int domid,
                                 const char *host, const char *port)
 {
-- 
2.1.4


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  parent reply	other threads:[~2016-06-07 11:24 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-07 11:23 [PATCH 0/3] libxl: update available vcpus map in retrieve configuration function Wei Liu
2016-06-07 11:24 ` [PATCH 1/3] libxl: introduce libxl__json_array_count Wei Liu
2016-06-07 11:24 ` Wei Liu [this message]
2016-06-07 11:24 ` [PATCH 3/3] libxl: update vcpus bitmap in retrieved guest config Wei Liu
2016-06-07 14:45   ` Anthony PERARD
2016-06-07 16:03     ` Wei Liu
2016-06-07 16:22       ` Dario Faggioli
2016-06-07 16:46         ` Wei Liu
2016-06-07 17:05           ` Dario Faggioli
2016-06-07 16:36       ` Anthony PERARD
2016-06-07 16:39         ` Wei Liu
2016-06-14 16:31   ` Ian Jackson
2016-06-14 16:39     ` Wei Liu

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