[Qemu-devel] [PATCH v1] qga: Add 'guest-get-fqdn' command

[Vinzenz 'evilissimo' Feenstra <vfeenstr@redhat.com>]

From: Vinzenz Feenstra <vfeenstr@redhat.com>

Retrieving the guest OS fully qualified domain name (FQDN) is a very
useful feature for virtual management systems. This information can help
to have more user friendly VM access details, instead of an IP there
would be the FQDN. Also the FQDN reported can be used to have automated
checks for valid SSL certificates.

virsh # qemu-agent-command F25 '{ "execute": "guest-get-fqdn" }'
{"return":{"fqdn":"F25.lab.evilissimo.net"}}

Signed-off-by: Vinzenz Feenstra <vfeenstr@redhat.com>
---
 qga/commands.c       | 11 +++++++++++
 qga/qapi-schema.json | 25 +++++++++++++++++++++++++
 2 files changed, 36 insertions(+)

diff --git a/qga/commands.c b/qga/commands.c
index 4d92946..61577af 100644
--- a/qga/commands.c
+++ b/qga/commands.c
@@ -499,3 +499,14 @@ int ga_parse_whence(GuestFileWhence *whence, Error **errp)
     error_setg(errp, "invalid whence code %"PRId64, whence->u.value);
     return -1;
 }
+
+GuestFQDN *qmp_guest_get_fqdn(Error **err)
+{
+    GuestFQDN *result = NULL;
+    gchar const *hostname = g_get_host_name();
+    if (hostname != NULL) {
+        result = g_new0(GuestFQDN, 1);
+        result->fqdn = g_strdup(hostname);
+    }
+    return result;
+}
diff --git a/qga/qapi-schema.json b/qga/qapi-schema.json
index a02dbf2..0a2c0a4 100644
--- a/qga/qapi-schema.json
+++ b/qga/qapi-schema.json
@@ -1042,3 +1042,28 @@
   'data':    { 'path': 'str', '*arg': ['str'], '*env': ['str'],
                '*input-data': 'str', '*capture-output': 'bool' },
   'returns': 'GuestExec' }
+
+
+
+##
+# @GuestFQDN:
+# @fqdn: Fully qualified domain name of the guest OS
+#
+# Since: 2.10
+##
+{ 'struct': 'GuestFQDN',
+  'data':   { 'fqdn': 'str' } }
+
+
+##
+# @guest-get-fqdn:
+#
+# Request the FQDN (Fully Qualified Domain Name) of the guest operating system
+#
+# Returns: FQDN on success
+#
+# Since: 2.10
+##
+{ 'command': 'guest-get-fqdn',
+  'returns': 'GuestFQDN' }
+
-- 
2.9.3