From 9e5ccc797249afe0c44232b6b0d2cae4ff7d8d21 Mon Sep 17 00:00:00 2001
Message-Id: <9e5ccc797249afe0c44232b6b0d2cae4ff7d8d21@dist-git>
From: Michal Privoznik <mprivozn@redhat.com>
Date: Fri, 26 Aug 2011 16:41:17 +0800
Subject: [PATCH] RHEL: screenshot: Implement multiple screen support

For https://bugzilla.redhat.com/show_bug.cgi?id=1026966
    https://bugzilla.redhat.com/show_bug.cgi?id=710489
RHEL only, requires __com.redhat_qxl_screendump

As RHEL qemu supports taking screenshot of other monitors than the
first one, we can allow libvirt to support this feature too.

Although this command allows screen specification via ID, there is
not a way to assign one to the primary monitor. Therefore, we must
stick to upstream command in case of primary monitor, and use this
new command in other cases.

(cherry picked from commit 800c9b2c1e0347585213ba6895db7cf064cda21c in
rhel-6.5 branch)

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>

Conflicts:
	src/qemu/qemu_driver.c - context
	src/qemu/qemu_monitor.c - don't return -1 without reporting an
	    error
---
 src/qemu/qemu_driver.c       | 22 +++++++++++++++-------
 src/qemu/qemu_monitor.c      | 14 ++++++++++++--
 src/qemu/qemu_monitor.h      |  3 ++-
 src/qemu/qemu_monitor_json.c | 24 ++++++++++++++++++++++++
 src/qemu/qemu_monitor_json.h |  4 ++++
 5 files changed, 57 insertions(+), 10 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 0507be8..7bdf329 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -3768,6 +3768,8 @@ qemuDomainScreenshot(virDomainPtr dom,
     char *ret = NULL;
     bool unlink_tmp = false;
     virQEMUDriverConfigPtr cfg = NULL;
+    int video_index = 0;
+    const char *video_id = NULL;
 
     virCheckFlags(0, NULL);
 
@@ -3789,12 +3791,15 @@ qemuDomainScreenshot(virDomainPtr dom,
         goto endjob;
     }
 
-    /* Well, even if qemu allows multiple graphic cards, heads, whatever,
-     * screenshot command does not */
-    if (screen) {
-        virReportError(VIR_ERR_INVALID_ARG,
-                       "%s", _("currently is supported only taking "
-                               "screenshots of screen ID 0"));
+    while (video_index < vm->def->nvideos) {
+        if (screen < vm->def->videos[video_index]->heads)
+            break;
+        screen -= vm->def->videos[video_index]->heads;
+        video_index++;
+    }
+
+    if (video_index == vm->def->nvideos) {
+        virReportError(VIR_ERR_INVALID_ARG, "%s", _("no such screen"));
         goto endjob;
     }
 
@@ -3809,8 +3814,11 @@ qemuDomainScreenshot(virDomainPtr dom,
 
     virSecurityManagerSetSavedStateLabel(qemu_driver->securityManager, vm->def, tmp);
 
+    if (video_index)
+        video_id = vm->def->videos[video_index]->info.alias;
+
     qemuDomainObjEnterMonitor(driver, vm);
-    if (qemuMonitorScreendump(priv->mon, tmp) < 0) {
+    if (qemuMonitorScreendump(priv->mon, tmp, video_id) < 0) {
         ignore_value(qemuDomainObjExitMonitor(driver, vm));
         goto endjob;
     }
diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 098e654..1e27470 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -3022,12 +3022,22 @@ qemuMonitorSendKey(qemuMonitorPtr mon,
 
 int
 qemuMonitorScreendump(qemuMonitorPtr mon,
-                      const char *file)
+                      const char *file,
+                      const char *id)
 {
-    VIR_DEBUG("file=%s", file);
+    VIR_DEBUG("file=%s, id=%s", file, id);
 
     QEMU_CHECK_MONITOR(mon);
 
+    if (id) {
+        if (!mon->json) {
+            virReportError(VIR_ERR_OPERATION_UNSUPPORTED, "%s",
+                           _("non-zero screen ID requires JSON monitor"));
+            return -1;
+        }
+        return qemuMonitorJSONScreendumpRH(mon, file, id);
+    }
+
     if (mon->json)
         return qemuMonitorJSONScreendump(mon, file);
     else
diff --git a/src/qemu/qemu_monitor.h b/src/qemu/qemu_monitor.h
index cb4cca8..6e4e09d 100644
--- a/src/qemu/qemu_monitor.h
+++ b/src/qemu/qemu_monitor.h
@@ -759,7 +759,8 @@ int qemuMonitorArbitraryCommand(qemuMonitorPtr mon,
 int qemuMonitorInjectNMI(qemuMonitorPtr mon);
 
 int qemuMonitorScreendump(qemuMonitorPtr mon,
-                          const char *file);
+                          const char *file,
+                          const char *id);
 
 int qemuMonitorSendKey(qemuMonitorPtr mon,
                        unsigned int holdtime,
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index bb426dc..35e38a9 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -4155,6 +4155,30 @@ int qemuMonitorJSONSendKey(qemuMonitorPtr mon,
     return ret;
 }
 
+int qemuMonitorJSONScreendumpRH(qemuMonitorPtr mon,
+                                const char *file,
+                                const char *id)
+{
+    int ret = -1;
+    virJSONValuePtr cmd, reply = NULL;
+
+    cmd = qemuMonitorJSONMakeCommand("__com.redhat_qxl_screendump",
+                                     "s:filename", file,
+                                     "s:id", id,
+                                     NULL);
+    if (!cmd)
+        return -1;
+
+    ret = qemuMonitorJSONCommand(mon, cmd, &reply);
+
+    if (ret == 0)
+        ret = qemuMonitorJSONCheckError(cmd, reply);
+
+    virJSONValueFree(cmd);
+    virJSONValueFree(reply);
+    return ret;
+}
+
 int qemuMonitorJSONScreendump(qemuMonitorPtr mon,
                               const char *file)
 {
diff --git a/src/qemu/qemu_monitor_json.h b/src/qemu/qemu_monitor_json.h
index 37a739e..4e6f2bc 100644
--- a/src/qemu/qemu_monitor_json.h
+++ b/src/qemu/qemu_monitor_json.h
@@ -287,6 +287,10 @@ int qemuMonitorJSONSendKey(qemuMonitorPtr mon,
                            unsigned int *keycodes,
                            unsigned int nkeycodes);
 
+int qemuMonitorJSONScreendumpRH(qemuMonitorPtr mon,
+                                const char *file,
+                                const char *id);
+
 int qemuMonitorJSONScreendump(qemuMonitorPtr mon,
                               const char *file);
 
-- 
2.9.0