qemu.conf: Allow users to enable/disable label remembering

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>

src/qemu/libvirtd_qemu.aug

@@ -71,6 +71,7 @@ module Libvirtd_qemu =
                  | str_entry "user"
                  | str_entry "group"
                  | bool_entry "dynamic_ownership"
+                 | bool_entry "remember_owner"
                  | str_array_entry "cgroup_controllers"
                  | str_array_entry "cgroup_device_acl"
                  | int_entry "seccomp_sandbox"

src/qemu/qemu.conf

@@ -450,6 +450,10 @@
 # Set to 0 to disable file ownership changes.
 #dynamic_ownership = 1
 
+# Whether libvirt should remember and restore the original
+# ownership over files it is relabeling. Defaults to 1, set
+# to 0 to disable the feature.
+#remember_owner = 1
 
 # What cgroup controllers to make use of with QEMU guests
 #

src/qemu/qemu_conf.c

@@ -145,6 +145,7 @@ virQEMUDriverConfigPtr virQEMUDriverConfigNew(bool privileged)
         cfg->group = (gid_t)-1;
     }
     cfg->dynamicOwnership = privileged;
+    cfg->rememberOwner = true;
 
     cfg->cgroupControllers = -1; /* -1 == auto-detect */
 
@@ -728,6 +729,9 @@ int virQEMUDriverConfigLoadFile(virQEMUDriverConfigPtr cfg,
     if (virConfGetValueBool(conf, "dynamic_ownership", &cfg->dynamicOwnership) < 0)
         goto cleanup;
 
+    if (virConfGetValueBool(conf, "remember_owner", &cfg->rememberOwner) < 0)
+        goto cleanup;
+
     if (virConfGetValueStringList(conf,  "cgroup_controllers", false,
                                   &controllers) < 0)
         goto cleanup;

src/qemu/test_libvirtd_qemu.aug.in

@@ -43,6 +43,7 @@ module Test_libvirtd_qemu =
 { "user" = "root" }
 { "group" = "root" }
 { "dynamic_ownership" = "1" }
+{ "remember_owner" = "1" }
 { "cgroup_controllers"
     { "1" = "cpu" }
     { "2" = "devices" }