[PATCH 5/8] ch_monitor: Add pty json builder function

[William Douglas <william.douglas@xxxxxxxxx>]

Add function to build the the json structure to configure a PTY in
cloud-hypervisor. The configuration only supports a single serial or
console device.

The devices themselves still aren't allowed in configurations yet
though.

Signed-off-by: William Douglas <william.douglas@xxxxxxxxx>
---
 src/ch/ch_monitor.c | 56 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)

diff --git a/src/ch/ch_monitor.c b/src/ch/ch_monitor.c
index 28d1c213cc..1ff956b61e 100644
--- a/src/ch/ch_monitor.c
+++ b/src/ch/ch_monitor.c
@@ -89,6 +89,59 @@ virCHMonitorBuildCPUJson(virJSONValue *content, virDomainDef *vmdef)
     return -1;
 }
 
+static int
+virCHMonitorBuildPTYJson(virJSONValue *content, virDomainDef *vmdef)
+{
+    virJSONValue *ptys = virJSONValueNewObject();
+
+    if ((vmdef->nconsoles &&
+         vmdef->consoles[0]->source->type == VIR_DOMAIN_CHR_TYPE_PTY)
+        && (vmdef->nserials &&
+            vmdef->serials[0]->source->type == VIR_DOMAIN_CHR_TYPE_PTY)) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("Only a single console or serial can be configured for this domain"));
+        return -1;
+    } else if (vmdef->nconsoles > 1) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("Only a single console can be configured for this domain"));
+        return -1;
+    } else if (vmdef->nserials > 1) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("Only a single serial can be configured for this domain"));
+        return -1;
+    }
+
+    if (vmdef->nconsoles) {
+        g_autoptr(virJSONValue) pty = virJSONValueNewObject();
+        if (vmdef->consoles[0]->source->type == VIR_DOMAIN_CHR_TYPE_PTY) {
+            if (virJSONValueObjectAppendString(pty, "mode", "Pty") < 0)
+                return -1;
+            if (virJSONValueObjectAppend(content, "console", &pty) < 0)
+                return -1;
+        } else {
+            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                           _("Console can only be enabled for a PTY"));
+            return -1;
+        }
+    }
+
+    if (vmdef->nserials) {
+        g_autoptr(virJSONValue) pty = virJSONValueNewObject();
+        if (vmdef->serials[0]->source->type == VIR_DOMAIN_CHR_TYPE_PTY) {
+            if (virJSONValueObjectAppendString(ptys, "mode", "Pty") < 0)
+                return -1;
+            if (virJSONValueObjectAppend(content, "serial", &pty) < 0)
+                return -1;
+        } else {
+            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                           _("Serial can only be enabled for a PTY"));
+            return -1;
+        }
+    }
+
+    return 0;
+}
+
 static int
 virCHMonitorBuildKernelRelatedJson(virJSONValue *content, virDomainDef *vmdef)
 {
@@ -370,6 +423,9 @@ virCHMonitorBuildVMJson(virDomainDef *vmdef, char **jsonstr)
         goto cleanup;
     }
 
+    if (virCHMonitorBuildPTYJson(content, vmdef) < 0)
+        goto cleanup;
+
     if (virCHMonitorBuildCPUJson(content, vmdef) < 0)
         goto cleanup;
 
-- 
2.31.1