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authorPaolo Bonzini <[email protected]>2010-04-01 19:57:12 +0200
committerAurelien Jarno <[email protected]>2010-04-09 18:55:56 +0200
commit28c289737309f0a6ea6e108b2bb5e2e93c6d7233 (patch)
treeb08de77b0948a1985d12a27943b83011424c4670 /balloon.c
parent00a1555e0cff5d710ea63145b18e2915b84b58de (diff)
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move balloon handling to balloon.c
Signed-off-by: Paolo Bonzini <[email protected]> Signed-off-by: Aurelien Jarno <[email protected]>
Diffstat (limited to 'balloon.c')
-rw-r--r--balloon.c146
1 files changed, 146 insertions, 0 deletions
diff --git a/balloon.c b/balloon.c
new file mode 100644
index 000000000..8e0b7f18d
--- /dev/null
+++ b/balloon.c
@@ -0,0 +1,146 @@
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "sysemu.h"
+#include "monitor.h"
+#include "qjson.h"
+#include "qint.h"
+#include "cpu-common.h"
+#include "kvm.h"
+#include "balloon.h"
+
+
+static QEMUBalloonEvent *qemu_balloon_event;
+void *qemu_balloon_event_opaque;
+
+void qemu_add_balloon_handler(QEMUBalloonEvent *func, void *opaque)
+{
+ qemu_balloon_event = func;
+ qemu_balloon_event_opaque = opaque;
+}
+
+int qemu_balloon(ram_addr_t target, MonitorCompletion cb, void *opaque)
+{
+ if (qemu_balloon_event) {
+ qemu_balloon_event(qemu_balloon_event_opaque, target, cb, opaque);
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+int qemu_balloon_status(MonitorCompletion cb, void *opaque)
+{
+ if (qemu_balloon_event) {
+ qemu_balloon_event(qemu_balloon_event_opaque, 0, cb, opaque);
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+static void print_balloon_stat(const char *key, QObject *obj, void *opaque)
+{
+ Monitor *mon = opaque;
+
+ if (strcmp(key, "actual"))
+ monitor_printf(mon, ",%s=%" PRId64, key,
+ qint_get_int(qobject_to_qint(obj)));
+}
+
+void monitor_print_balloon(Monitor *mon, const QObject *data)
+{
+ QDict *qdict;
+
+ qdict = qobject_to_qdict(data);
+ if (!qdict_haskey(qdict, "actual"))
+ return;
+
+ monitor_printf(mon, "balloon: actual=%" PRId64,
+ qdict_get_int(qdict, "actual") >> 20);
+ qdict_iter(qdict, print_balloon_stat, mon);
+ monitor_printf(mon, "\n");
+}
+
+/**
+ * do_info_balloon(): Balloon information
+ *
+ * Make an asynchronous request for balloon info. When the request completes
+ * a QDict will be returned according to the following specification:
+ *
+ * - "actual": current balloon value in bytes
+ * The following fields may or may not be present:
+ * - "mem_swapped_in": Amount of memory swapped in (bytes)
+ * - "mem_swapped_out": Amount of memory swapped out (bytes)
+ * - "major_page_faults": Number of major faults
+ * - "minor_page_faults": Number of minor faults
+ * - "free_mem": Total amount of free and unused memory (bytes)
+ * - "total_mem": Total amount of available memory (bytes)
+ *
+ * Example:
+ *
+ * { "actual": 1073741824, "mem_swapped_in": 0, "mem_swapped_out": 0,
+ * "major_page_faults": 142, "minor_page_faults": 239245,
+ * "free_mem": 1014185984, "total_mem": 1044668416 }
+ */
+int do_info_balloon(Monitor *mon, MonitorCompletion cb, void *opaque)
+{
+ int ret;
+
+ if (kvm_enabled() && !kvm_has_sync_mmu()) {
+ qerror_report(QERR_KVM_MISSING_CAP, "synchronous MMU", "balloon");
+ return -1;
+ }
+
+ ret = qemu_balloon_status(cb, opaque);
+ if (!ret) {
+ qerror_report(QERR_DEVICE_NOT_ACTIVE, "balloon");
+ return -1;
+ }
+
+ return 0;
+}
+
+/**
+ * do_balloon(): Request VM to change its memory allocation
+ */
+int do_balloon(Monitor *mon, const QDict *params,
+ MonitorCompletion cb, void *opaque)
+{
+ int ret;
+
+ if (kvm_enabled() && !kvm_has_sync_mmu()) {
+ qerror_report(QERR_KVM_MISSING_CAP, "synchronous MMU", "balloon");
+ return -1;
+ }
+
+ ret = qemu_balloon(qdict_get_int(params, "value"), cb, opaque);
+ if (ret == 0) {
+ qerror_report(QERR_DEVICE_NOT_ACTIVE, "balloon");
+ return -1;
+ }
+
+ cb(opaque, NULL);
+ return 0;
+}