From 0d3a8f32b1e0eca279da1b0cc793efc7250c3daf Mon Sep 17 00:00:00 2001 From: Michal Privoznik Date: Mon, 22 Jun 2020 20:19:36 +0200 Subject: qga: Use qemu_get_host_name() instead of g_get_host_name() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Problem with g_get_host_name() is that on the first call it saves the hostname into a global variable and from then on, every subsequent call returns the saved hostname. Even if the hostname changes. This doesn't play nicely with guest agent, because if the hostname is acquired before the guest is set up (e.g. on the first boot, or before DHCP) we will report old, invalid hostname. Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1845127 Signed-off-by: Michal Privoznik Reviewed-by: Daniel P. Berrangé Cc: qemu-stable@nongnu.org Signed-off-by: Michael Roth --- qga/commands.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) (limited to 'qga') diff --git a/qga/commands.c b/qga/commands.c index efc8b90281..d3fec807c1 100644 --- a/qga/commands.c +++ b/qga/commands.c @@ -515,11 +515,20 @@ int ga_parse_whence(GuestFileWhence *whence, Error **errp) GuestHostName *qmp_guest_get_host_name(Error **errp) { GuestHostName *result = NULL; - gchar const *hostname = g_get_host_name(); - if (hostname != NULL) { - result = g_new0(GuestHostName, 1); - result->host_name = g_strdup(hostname); + g_autofree char *hostname = qemu_get_host_name(errp); + + /* + * We want to avoid using g_get_host_name() because that + * caches the result and we wouldn't reflect changes in the + * host name. + */ + + if (!hostname) { + hostname = g_strdup("localhost"); } + + result = g_new0(GuestHostName, 1); + result->host_name = g_steal_pointer(&hostname); return result; } -- cgit v1.2.3