[libvirt] [PATCH v3 12/12] LXC: introduce virLXCControllerChown

[Gao feng]

use virLXCControllerChown to make codes clearer.

Signed-off-by: Gao feng <gaofeng at cn.fujitsu.com>
---
 src/lxc/lxc_controller.c | 81 ++++++++++++++++++------------------------------
 1 file changed, 31 insertions(+), 50 deletions(-)

diff --git a/src/lxc/lxc_controller.c b/src/lxc/lxc_controller.c
index 7d27135..1cceecf 100644
--- a/src/lxc/lxc_controller.c
+++ b/src/lxc/lxc_controller.c
@@ -1121,6 +1121,29 @@ cleanup2:
     return rc;
 }
 
+static int
+virLXCControllerChown(virLXCControllerPtr ctrl,
+                      char *path)
+{
+    uid_t uid = -1;
+    gid_t gid = -1;
+
+    if (!ctrl->def->idmap.uidmap)
+        return 0;
+
+    uid = ctrl->def->idmap.uidmap[0].target;
+    gid = ctrl->def->idmap.gidmap[0].target;
+
+    if (chown(path, uid, gid) < 0) {
+        virReportSystemError(errno,
+                             _("Failed to change owner of %s to %u:%u"),
+                             path, uid, gid);
+        return -1;
+    }
+
+    return 0;
+}
+
 
 static int
 virLXCControllerSetupUsernsMap(virDomainIdMapEntryPtr map,
@@ -1260,8 +1283,6 @@ static int virLXCControllerPopulateDevices(virLXCControllerPtr ctrl)
     size_t i;
     int ret = -1;
     char *path = NULL;
-    uid_t uid = (uid_t)-1;
-    gid_t gid = (gid_t)-1;
     const struct {
         int maj;
         int min;
@@ -1278,11 +1299,6 @@ static int virLXCControllerPopulateDevices(virLXCControllerPtr ctrl)
     if (virLXCControllerSetupDev(ctrl) < 0)
         goto out;
 
-    if (ctrl->def->idmap.uidmap) {
-        uid = ctrl->def->idmap.uidmap[0].target;
-        gid = ctrl->def->idmap.gidmap[0].target;
-    }
-
     /* Populate /dev/ with a few important bits */
     for (i = 0 ; i < ARRAY_CARDINALITY(devs) ; i++) {
         if (virAsprintf(&path, "/%s/%s.dev/%s",
@@ -1301,12 +1317,9 @@ static int virLXCControllerPopulateDevices(virLXCControllerPtr ctrl)
             goto out;
         }
 
-        if (chown(path, uid, gid) < 0) {
-            virReportSystemError(errno,
-                                 _("Failed to change owner of %s to %u:%u"),
-                                 devs[i].path, uid, gid);
+        if (virLXCControllerChown(ctrl, path) < 0)
             goto out;
-        }
+
         VIR_FREE(path);
     }
 
@@ -1506,15 +1519,8 @@ virLXCControllerSetupDevPTS(virLXCControllerPtr ctrl)
     char *opts = NULL;
     char *devpts = NULL;
     char *path = NULL;
-    uid_t uid = (uid_t)-1;
-    gid_t gid = (gid_t)-1;
     int ret = -1;
 
-    if (ctrl->def->idmap.uidmap) {
-        uid = ctrl->def->idmap.uidmap[0].target;
-        gid = ctrl->def->idmap.gidmap[0].target;
-    }
-
     VIR_DEBUG("Setting up private /dev/pts");
 
     mount_options = virSecurityManagerGetMountOptions(ctrl->securityManager,
@@ -1558,20 +1564,11 @@ virLXCControllerSetupDevPTS(virLXCControllerPtr ctrl)
         goto cleanup;
     }
 
-    if (chown(ctrl->devptmx, uid, gid) < 0) {
-        virReportSystemError(errno,
-                             _("Failed to change the owner of"
-                            "%s to %u:%u"),
-                             path, uid, gid);
+    if (virLXCControllerChown(ctrl, ctrl->devptmx) < 0)
         goto cleanup;
-    }
-    if (chown(devpts, uid, gid) < 0) {
-        virReportSystemError(errno,
-                             _("Failed to change the owner of"
-                             "%s to %u:%u"),
-                             devpts, uid, gid);
+
+    if (virLXCControllerChown(ctrl, devpts) < 0)
         goto cleanup;
-    }
 
     if (access(ctrl->devptmx, W_OK) < 0) {
         if (virAsprintf(&path, "/%s/%s.dev/ptmx",
@@ -1586,13 +1583,8 @@ virLXCControllerSetupDevPTS(virLXCControllerPtr ctrl)
             virReportSystemError(errno,  _("Failed to make device %s"), path);
             goto cleanup;
         }
-        if (chown(path, uid, gid) < 0) {
-            virReportSystemError(errno,
-                                 _("Failed to change the owner of"
-                                 "%s to %u:%u"),
-                                 path, uid, gid);
+        if (virLXCControllerChown(ctrl, path) < 0)
             goto cleanup;
-        }
     }
 
 
@@ -1619,15 +1611,8 @@ virLXCControllerSetupConsoles(virLXCControllerPtr ctrl,
 {
     size_t i;
     int ret = -1;
-    uid_t uid = (uid_t)-1;
-    gid_t gid = (gid_t)-1;
     char *ttyHostPath = NULL;
 
-    if (ctrl->def->idmap.uidmap) {
-        uid = ctrl->def->idmap.uidmap[0].target;
-        gid = ctrl->def->idmap.gidmap[0].target;
-    }
-
     for (i = 0; i < ctrl->nconsoles; i++) {
         VIR_DEBUG("Opening tty on private %s", ctrl->devptmx);
         if (lxcCreateTty(ctrl,
@@ -1639,13 +1624,9 @@ virLXCControllerSetupConsoles(virLXCControllerPtr ctrl,
         }
 
         /* Change the owner of tty device to the root user of container */
-        if (chown(ttyHostPath, uid, gid) < 0) {
-            virReportSystemError(errno,
-                                 _("Failed to change owner of tty"
-                                 " %s to %u:%u"),
-                                 ttyHostPath, uid, gid);
+        if (virLXCControllerChown(ctrl, ttyHostPath) < 0)
             goto out;
-        }
+
         VIR_FREE(ttyHostPath);
     }
 
-- 
1.8.1.4