qga: implement qmp_guest_set_vcpus() for Linux with sysfs

Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>

1 files changed, 32 insertions, 6 deletions

diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index 17cedab..d7da850 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -1245,6 +1245,32 @@ GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
     return NULL;
 }
 
+int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
+{
+    int64_t processed;
+    Error *local_err = NULL;
+
+    processed = 0;
+    while (vcpus != NULL) {
+        transfer_vcpu(vcpus->value, false, &local_err);
+        if (local_err != NULL) {
+            break;
+        }
+        ++processed;
+        vcpus = vcpus->next;
+    }
+
+    if (local_err != NULL) {
+        if (processed == 0) {
+            error_propagate(errp, local_err);
+        } else {
+            error_free(local_err);
+        }
+    }
+
+    return processed;
+}
+
 #else /* defined(__linux__) */
 
 void qmp_guest_suspend_disk(Error **err)
@@ -1274,6 +1300,12 @@ GuestLogicalProcessorList *qmp_guest_get_vcpus(Error **errp)
     return NULL;
 }
 
+int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
+{
+    error_set(errp, QERR_UNSUPPORTED);
+    return -1;
+}
+
 #endif
 
 #if !defined(CONFIG_FSFREEZE)
@@ -1307,12 +1339,6 @@ void qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **err)
 }
 #endif
 
-int64_t qmp_guest_set_vcpus(GuestLogicalProcessorList *vcpus, Error **errp)
-{
-    error_set(errp, QERR_UNSUPPORTED);
-    return -1;
-}
-
 /* register init/cleanup routines for stateful command groups */
 void ga_command_state_init(GAState *s, GACommandState *cs)
 {