[libvirt] [PATCH v4 7/8] qemu: Implement the driver methods
Michal Privoznik
mprivozn at redhat.com
Thu May 12 16:29:14 UTC 2011
* src/qemu/qemu_driver.c: new qemuDomainScreenshot() function
* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h,
src/qemu/qemu_monitor_json.c, src/qemu/qemu_monitor_json.h,
src/qemu/qemu_monitor_text.c, src/qemu/qemu_monitor_text.h:
Monitor command
---
src/qemu/qemu_driver.c | 90 +++++++++++++++++++++++++++++++++++++++++-
src/qemu/qemu_monitor.c | 20 +++++++++
src/qemu/qemu_monitor.h | 3 +
src/qemu/qemu_monitor_json.c | 23 +++++++++++
src/qemu/qemu_monitor_json.h | 5 ++
src/qemu/qemu_monitor_text.c | 31 ++++++++++++++
src/qemu/qemu_monitor_text.h | 3 +
7 files changed, 174 insertions(+), 1 deletions(-)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 482f177..c0cd407 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -2486,6 +2486,94 @@ cleanup:
return ret;
}
+static char *
+qemuDomainScreenshot(virDomainPtr dom,
+ virStreamPtr st,
+ unsigned int screen,
+ unsigned int flags ATTRIBUTE_UNUSED)
+{
+ struct qemud_driver *driver = dom->conn->privateData;
+ virDomainObjPtr vm;
+ qemuDomainObjPrivatePtr priv;
+ char *tmp = NULL;
+ int tmp_fd = -1;
+ char *ret = NULL;
+
+ qemuDriverLock(driver);
+ vm = virDomainFindByUUID(&driver->domains, dom->uuid);
+ qemuDriverUnlock(driver);
+
+ if (!vm) {
+ char uuidstr[VIR_UUID_STRING_BUFLEN];
+ virUUIDFormat(dom->uuid, uuidstr);
+ qemuReportError(VIR_ERR_NO_DOMAIN,
+ _("no domain matching uuid '%s'"), uuidstr);
+ goto cleanup;
+ }
+
+ priv = vm->privateData;
+
+ if (qemuDomainObjBeginJob(vm) < 0)
+ goto cleanup;
+
+ if (!virDomainObjIsActive(vm)) {
+ qemuReportError(VIR_ERR_OPERATION_INVALID,
+ "%s", _("domain is not running"));
+ goto endjob;
+ }
+
+ /* Well, even if qemu allows multiple graphic cards, heads, whatever,
+ * screenshot command does not */
+ if (screen) {
+ qemuReportError(VIR_ERR_INVALID_ARG,
+ "%s", _("currently is supported only taking "
+ "screenshots of screen ID 0"));
+ goto endjob;
+ }
+
+ if (virAsprintf(&tmp, "%s/qemu.screendump.XXXXXX", driver->cacheDir) < 0) {
+ virReportOOMError();
+ goto endjob;
+ }
+
+ if ((tmp_fd = mkstemp(tmp)) == -1) {
+ virReportSystemError(errno, _("mkstemp(\"%s\") failed"), tmp);
+ goto endjob;
+ }
+
+ qemuDomainObjEnterMonitor(vm);
+ if (qemuMonitorScreendump(priv->mon, tmp) < 0) {
+ qemuDomainObjExitMonitor(vm);
+ goto endjob;
+ }
+ qemuDomainObjExitMonitor(vm);
+
+ if (VIR_CLOSE(tmp_fd) < 0) {
+ virReportSystemError(errno, _("unable to close %s"), tmp);
+ goto endjob;
+ }
+
+ if (virFDStreamOpenFile(st, tmp, 0, 0, O_RDONLY, true) < 0) {
+ qemuReportError(VIR_ERR_OPERATION_FAILED, "%s",
+ _("unable to open stream"));
+ goto endjob;
+ }
+
+ ret = strdup("image/x-portable-pixmap; charset=binary");
+
+endjob:
+ VIR_FORCE_CLOSE(tmp_fd);
+ VIR_FREE(tmp);
+
+ if (qemuDomainObjEndJob(vm) == 0)
+ vm = NULL;
+
+cleanup:
+ if (vm)
+ virDomainObjUnlock(vm);
+ return ret;
+}
+
static void processWatchdogEvent(void *data, void *opaque)
{
int ret;
@@ -7171,7 +7259,7 @@ static virDriver qemuDriver = {
qemudDomainSave, /* domainSave */
qemuDomainRestore, /* domainRestore */
qemudDomainCoreDump, /* domainCoreDump */
- NULL, /* domainScreenshot */
+ qemuDomainScreenshot, /* domainScreenshot */
qemudDomainSetVcpus, /* domainSetVcpus */
qemudDomainSetVcpusFlags, /* domainSetVcpusFlags */
qemudDomainGetVcpusFlags, /* domainGetVcpusFlags */
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index f031514..421a81e 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -2242,3 +2242,23 @@ int qemuMonitorInjectNMI(qemuMonitorPtr mon)
ret = qemuMonitorTextInjectNMI(mon);
return ret;
}
+
+int qemuMonitorScreendump(qemuMonitorPtr mon,
+ const char *file)
+{
+ int ret;
+
+ VIR_DEBUG("mon=%p, file=%s", mon, file);
+
+ if (!mon) {
+ qemuReportError(VIR_ERR_INVALID_ARG,"%s",
+ _("monitor must not be NULL"));
+ return -1;
+ }
+
+ if (mon->json)
+ ret = qemuMonitorJSONScreendump(mon, file);
+ else
+ ret = qemuMonitorTextScreendump(mon, file);
+ return ret;
+}
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index b84e230..ee3e14d 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -425,6 +425,9 @@ int qemuMonitorArbitraryCommand(qemuMonitorPtr mon,
int qemuMonitorInjectNMI(qemuMonitorPtr mon);
+int qemuMonitorScreendump(qemuMonitorPtr mon,
+ const char *file);
+
/**
* When running two dd process and using <> redirection, we need a
* shell that will not truncate files. These two strings serve that
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 047a81f..32da893 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -2540,3 +2540,26 @@ cleanup:
virJSONValueFree(reply);
return ret;
}
+
+int qemuMonitorJSONScreendump(qemuMonitorPtr mon,
+ const char *file)
+{
+ int ret;
+ virJSONValuePtr cmd, reply = NULL;
+
+ cmd = qemuMonitorJSONMakeCommand("screendump",
+ "s:filename", file,
+ NULL);
+
+ if (!cmd)
+ return -1;
+
+ ret = qemuMonitorJSONCommand(mon, cmd, &reply);
+
+ if (ret == 0)
+ ret = qemuMonitorJSONCheckError(cmd, reply);
+
+ virJSONValueFree(cmd);
+ virJSONValueFree(reply);
+ return ret;
+}
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index f2dc4d2..3158882 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -205,4 +205,9 @@ int qemuMonitorJSONArbitraryCommand(qemuMonitorPtr mon,
bool hmp);
int qemuMonitorJSONInjectNMI(qemuMonitorPtr mon);
+
+int qemuMonitorJSONScreendump(qemuMonitorPtr mon,
+ const char *file);
+
+
#endif /* QEMU_MONITOR_JSON_H */
diff --git a/src/qemu/qemu_monitor_text.c b/src/qemu/qemu_monitor_text.c
index 1d90c1b..b83809c 100644
--- a/src/qemu/qemu_monitor_text.c
+++ b/src/qemu/qemu_monitor_text.c
@@ -2655,3 +2655,34 @@ fail:
cmd);
return -1;
}
+
+/* Returns -1 on error, -2 if not supported */
+int qemuMonitorTextScreendump(qemuMonitorPtr mon, const char *file)
+{
+ char *cmd = NULL;
+ char *reply = NULL;
+ int ret = -1;
+
+ if (virAsprintf(&cmd, "screendump %s", file) < 0){
+ virReportOOMError();
+ goto cleanup;
+ }
+
+ if (qemuMonitorHMPCommand(mon, cmd, &reply) < 0) {
+ qemuReportError(VIR_ERR_OPERATION_FAILED,
+ "%s", _("taking screenshot failed"));
+ goto cleanup;
+ }
+
+ if (strstr(reply, "unknown command:")) {
+ ret = -2;
+ goto cleanup;
+ }
+
+ ret = 0;
+
+cleanup:
+ VIR_FREE(reply);
+ VIR_FREE(cmd);
+ return ret;
+}
diff --git a/src/qemu/qemu_monitor_text.h b/src/qemu/qemu_monitor_text.h
index dbae72b..1ee1179 100644
--- a/src/qemu/qemu_monitor_text.h
+++ b/src/qemu/qemu_monitor_text.h
@@ -199,4 +199,7 @@ int qemuMonitorTextArbitraryCommand(qemuMonitorPtr mon, const char *cmd,
char **reply);
int qemuMonitorTextInjectNMI(qemuMonitorPtr mon);
+
+int qemuMonitorTextScreendump(qemuMonitorPtr mon, const char *file);
+
#endif /* QEMU_MONITOR_TEXT_H */
--
1.7.5.rc3
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