[libvirt] [PATCH v3 12/20] Add a qemuMonitorGetCommands() method for QMP query-commands command
Daniel P. Berrange
berrange at redhat.com
Tue Sep 25 18:00:05 UTC 2012
From: "Daniel P. Berrange" <berrange at redhat.com>
Add a new qemuMonitorGetCPUCommands() method to support invocation
of the 'query-cpu-definitions' JSON monitor command. No HMP equivalent
is required, since this will only be used when JSON is available
The existing qemuMonitorJSONCheckCommands() method is refactored
to use this new method
Signed-off-by: Daniel P. Berrange <berrange at redhat.com>
---
src/qemu/qemu_monitor.c | 22 +++++++++
src/qemu/qemu_monitor.h | 3 ++
src/qemu/qemu_monitor_json.c | 114 +++++++++++++++++++++++++++++++------------
src/qemu/qemu_monitor_json.h | 4 ++
tests/qemumonitorjsontest.c | 62 +++++++++++++++++++++++
5 files changed, 175 insertions(+), 30 deletions(-)
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 45bb32e..172b826 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -3072,3 +3072,25 @@ int qemuMonitorGetCPUDefinitions(qemuMonitorPtr mon,
return qemuMonitorJSONGetCPUDefinitions(mon, cpus);
}
+
+
+int qemuMonitorGetCommands(qemuMonitorPtr mon,
+ char ***commands)
+{
+ VIR_DEBUG("mon=%p commands=%p",
+ mon, commands);
+
+ if (!mon) {
+ virReportError(VIR_ERR_INVALID_ARG, "%s",
+ _("monitor must not be NULL"));
+ return -1;
+ }
+
+ if (!mon->json) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("JSON monitor is required"));
+ return -1;
+ }
+
+ return qemuMonitorJSONGetCommands(mon, commands);
+}
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index fa192d4..40bce06 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -594,6 +594,9 @@ void qemuMonitorMachineInfoFree(qemuMonitorMachineInfoPtr machine);
int qemuMonitorGetCPUDefinitions(qemuMonitorPtr mon,
char ***cpus);
+int qemuMonitorGetCommands(qemuMonitorPtr mon,
+ char ***commands);
+
/**
* When running two dd process and using <> redirection, we need a
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 876188d..9b05412 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -976,32 +976,15 @@ int
qemuMonitorJSONCheckCommands(qemuMonitorPtr mon,
qemuCapsPtr caps)
{
- int ret = -1;
- virJSONValuePtr cmd = qemuMonitorJSONMakeCommand("query-commands", NULL);
- virJSONValuePtr reply = NULL;
- virJSONValuePtr data;
- int i, n;
-
- if (!cmd)
- return ret;
-
- if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0 ||
- qemuMonitorJSONCheckError(cmd, reply) < 0)
- goto cleanup;
-
- if (!(data = virJSONValueObjectGet(reply, "return")) ||
- data->type != VIR_JSON_TYPE_ARRAY ||
- (n = virJSONValueArraySize(data)) <= 0)
- goto cleanup;
-
- for (i = 0; i < n; i++) {
- virJSONValuePtr entry;
- const char *name;
+ char **commands = NULL;
+ int ncommands;
+ size_t i;
- if (!(entry = virJSONValueArrayGet(data, i)) ||
- !(name = virJSONValueObjectGetString(entry, "name")))
- goto cleanup;
+ if ((ncommands = qemuMonitorJSONGetCommands(mon, &commands)) < 0)
+ return -1;
+ for (i = 0 ; i < ncommands ; i++) {
+ char *name = commands[i];
if (STREQ(name, "system_wakeup"))
qemuCapsSet(caps, QEMU_CAPS_WAKEUP);
else if (STREQ(name, "transaction"))
@@ -1012,14 +995,11 @@ qemuMonitorJSONCheckCommands(qemuMonitorPtr mon,
qemuCapsSet(caps, QEMU_CAPS_BLOCKJOB_ASYNC);
else if (STREQ(name, "dump-guest-memory"))
qemuCapsSet(caps, QEMU_CAPS_DUMP_GUEST_MEMORY);
+ VIR_FREE(name);
}
+ VIR_FREE(commands);
- ret = 0;
-
-cleanup:
- virJSONValueFree(cmd);
- virJSONValueFree(reply);
- return ret;
+ return 0;
}
@@ -4065,3 +4045,77 @@ cleanup:
return ret;
}
+
+int qemuMonitorJSONGetCommands(qemuMonitorPtr mon,
+ char ***commands)
+{
+ int ret;
+ virJSONValuePtr cmd;
+ virJSONValuePtr reply = NULL;
+ virJSONValuePtr data;
+ char **commandlist = NULL;
+ int n = 0;
+ size_t i;
+
+ *commands = NULL;
+
+ if (!(cmd = qemuMonitorJSONMakeCommand("query-commands", NULL)))
+ return -1;
+
+ ret = qemuMonitorJSONCommand(mon, cmd, &reply);
+
+ if (ret == 0)
+ ret = qemuMonitorJSONCheckError(cmd, reply);
+
+ if (ret < 0)
+ goto cleanup;
+
+ ret = -1;
+
+ if (!(data = virJSONValueObjectGet(reply, "return"))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("query-commands reply was missing return data"));
+ goto cleanup;
+ }
+
+ if ((n = virJSONValueArraySize(data)) < 0) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("query-commands reply data was not an array"));
+ goto cleanup;
+ }
+
+ if (VIR_ALLOC_N(commandlist, n) < 0) {
+ virReportOOMError();
+ goto cleanup;
+ }
+
+ for (i = 0 ; i < n ; i++) {
+ virJSONValuePtr child = virJSONValueArrayGet(data, i);
+ const char *tmp;
+
+ if (!(tmp = virJSONValueObjectGetString(child, "name"))) {
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("query-commands reply data was missing 'name'"));
+ goto cleanup;
+ }
+
+ if (!(commandlist[i] = strdup(tmp))) {
+ virReportOOMError();
+ goto cleanup;
+ }
+ }
+
+ ret = n;
+ *commands = commandlist;
+
+cleanup:
+ if (ret < 0 && commandlist) {
+ for (i = 0 ; i < n ; i++)
+ VIR_FREE(commandlist[i]);
+ VIR_FREE(commandlist);
+ }
+ virJSONValueFree(cmd);
+ virJSONValueFree(reply);
+ return ret;
+}
+
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index 218cd02..9a64511 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -295,4 +295,8 @@ int qemuMonitorJSONGetCPUDefinitions(qemuMonitorPtr mon,
char ***cpus)
ATTRIBUTE_NONNULL(2);
+int qemuMonitorJSONGetCommands(qemuMonitorPtr mon,
+ char ***commands)
+ ATTRIBUTE_NONNULL(2);
+
#endif /* QEMU_MONITOR_JSON_H */
diff --git a/tests/qemumonitorjsontest.c b/tests/qemumonitorjsontest.c
index 1346441..fc386fe 100644
--- a/tests/qemumonitorjsontest.c
+++ b/tests/qemumonitorjsontest.c
@@ -361,6 +361,67 @@ cleanup:
static int
+testQemuMonitorJSONGetCommands(const void *data)
+{
+ virCapsPtr caps = (virCapsPtr)data;
+ qemuMonitorTestPtr test = qemuMonitorTestNew(true, caps);
+ int ret = -1;
+ char **commands = NULL;
+ int ncommands;
+
+ if (!test)
+ return -1;
+
+ if (qemuMonitorTestAddItem(test, "query-commands",
+ "{ "
+ " \"return\": [ "
+ " { "
+ " \"name\": \"system_wakeup\" "
+ " }, "
+ " { "
+ " \"name\": \"cont\" "
+ " }, "
+ " { "
+ " \"name\": \"quit\" "
+ " } "
+ " ]"
+ "}") < 0)
+ goto cleanup;
+
+ if ((ncommands = qemuMonitorGetCommands(qemuMonitorTestGetMonitor(test),
+ &commands)) < 0)
+ goto cleanup;
+
+ if (ncommands != 3) {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ "ncommands %d is not 3", ncommands);
+ goto cleanup;
+ }
+
+#define CHECK(i, wantname) \
+ do { \
+ if (STRNEQ(commands[i], (wantname))) { \
+ virReportError(VIR_ERR_INTERNAL_ERROR, \
+ "name %s is not %s", \
+ commands[i], (wantname)); \
+ goto cleanup; \
+ } \
+ } while (0)
+
+ CHECK(0, "system_wakeup");
+ CHECK(1, "cont");
+ CHECK(2, "quit");
+
+#undef CHECK
+ ret = 0;
+
+cleanup:
+ qemuMonitorTestFree(test);
+ return ret;
+}
+
+
+static int
mymain(void)
{
int ret = 0;
@@ -382,6 +443,7 @@ mymain(void)
DO_TEST(GetVersion);
DO_TEST(GetMachines);
DO_TEST(GetCPUDefinitions);
+ DO_TEST(GetCommands);
virCapabilitiesFree(caps);
--
1.7.11.4
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