[libvirt] [PATCH v2 2/3] access: Modify the VIR_ERR_ACCESS_DENIED to include driverName

[John Ferlan]

https://bugzilla.redhat.com/show_bug.cgi?id=1631606

Changes made to manage and utilize a secondary connection
driver to APIs outside the scope of the primary connection
driver have resulted in some confusion processing polkit rules
since the simple "access denied" error message doesn't provide
enough of a clue when combined with the "authentication failed:
access denied by policy" as to which connection driver refused
or failed the ACL check.

In order to provide some context, let's modify the existing
"access denied" error returned from the various vir*EnsureACL
API's to provide the connection driver name that is causing
the failure. This should provide the context for writing the
polkit rules that would allow access via the driver, but yet
still adhere to the virAccessManagerSanitizeError commentary
regarding not telling the user why access was denied.

Signed-off-by: John Ferlan <jferlan at redhat.com>
---
 src/access/viraccessmanager.c | 26 ++++++++++++++------------
 src/rpc/gendispatch.pl        |  3 ++-
 2 files changed, 16 insertions(+), 13 deletions(-)

diff --git a/src/access/viraccessmanager.c b/src/access/viraccessmanager.c
index e7b5bf38da..f5d62604cf 100644
--- a/src/access/viraccessmanager.c
+++ b/src/access/viraccessmanager.c
@@ -196,11 +196,13 @@ static void virAccessManagerDispose(void *object)
  * should the admin need to debug things
  */
 static int
-virAccessManagerSanitizeError(int ret)
+virAccessManagerSanitizeError(int ret,
+                              const char *driverName)
 {
     if (ret < 0) {
         virResetLastError();
-        virAccessError(VIR_ERR_ACCESS_DENIED, NULL);
+        virAccessError(VIR_ERR_ACCESS_DENIED,
+                       _("'%s' denied access"), driverName);
     }
 
     return ret;
@@ -217,7 +219,7 @@ int virAccessManagerCheckConnect(virAccessManagerPtr manager,
     if (manager->drv->checkConnect)
         ret = manager->drv->checkConnect(manager, driverName, perm);
 
-    return virAccessManagerSanitizeError(ret);
+    return virAccessManagerSanitizeError(ret, driverName);
 }
 
 
@@ -233,7 +235,7 @@ int virAccessManagerCheckDomain(virAccessManagerPtr manager,
     if (manager->drv->checkDomain)
         ret = manager->drv->checkDomain(manager, driverName, domain, perm);
 
-    return virAccessManagerSanitizeError(ret);
+    return virAccessManagerSanitizeError(ret, driverName);
 }
 
 int virAccessManagerCheckInterface(virAccessManagerPtr manager,
@@ -248,7 +250,7 @@ int virAccessManagerCheckInterface(virAccessManagerPtr manager,
     if (manager->drv->checkInterface)
         ret = manager->drv->checkInterface(manager, driverName, iface, perm);
 
-    return virAccessManagerSanitizeError(ret);
+    return virAccessManagerSanitizeError(ret, driverName);
 }
 
 int virAccessManagerCheckNetwork(virAccessManagerPtr manager,
@@ -263,7 +265,7 @@ int virAccessManagerCheckNetwork(virAccessManagerPtr manager,
     if (manager->drv->checkNetwork)
         ret = manager->drv->checkNetwork(manager, driverName, network, perm);
 
-    return virAccessManagerSanitizeError(ret);
+    return virAccessManagerSanitizeError(ret, driverName);
 }
 
 int virAccessManagerCheckNodeDevice(virAccessManagerPtr manager,
@@ -278,7 +280,7 @@ int virAccessManagerCheckNodeDevice(virAccessManagerPtr manager,
     if (manager->drv->checkNodeDevice)
         ret = manager->drv->checkNodeDevice(manager, driverName, nodedev, perm);
 
-    return virAccessManagerSanitizeError(ret);
+    return virAccessManagerSanitizeError(ret, driverName);
 }
 
 int virAccessManagerCheckNWFilter(virAccessManagerPtr manager,
@@ -293,7 +295,7 @@ int virAccessManagerCheckNWFilter(virAccessManagerPtr manager,
     if (manager->drv->checkNWFilter)
         ret = manager->drv->checkNWFilter(manager, driverName, nwfilter, perm);
 
-    return virAccessManagerSanitizeError(ret);
+    return virAccessManagerSanitizeError(ret, driverName);
 }
 
 int virAccessManagerCheckNWFilterBinding(virAccessManagerPtr manager,
@@ -308,7 +310,7 @@ int virAccessManagerCheckNWFilterBinding(virAccessManagerPtr manager,
     if (manager->drv->checkNWFilterBinding)
         ret = manager->drv->checkNWFilterBinding(manager, driverName, binding, perm);
 
-    return virAccessManagerSanitizeError(ret);
+    return virAccessManagerSanitizeError(ret, driverName);
 }
 
 int virAccessManagerCheckSecret(virAccessManagerPtr manager,
@@ -323,7 +325,7 @@ int virAccessManagerCheckSecret(virAccessManagerPtr manager,
     if (manager->drv->checkSecret)
         ret = manager->drv->checkSecret(manager, driverName, secret, perm);
 
-    return virAccessManagerSanitizeError(ret);
+    return virAccessManagerSanitizeError(ret, driverName);
 }
 
 int virAccessManagerCheckStoragePool(virAccessManagerPtr manager,
@@ -338,7 +340,7 @@ int virAccessManagerCheckStoragePool(virAccessManagerPtr manager,
     if (manager->drv->checkStoragePool)
         ret = manager->drv->checkStoragePool(manager, driverName, pool, perm);
 
-    return virAccessManagerSanitizeError(ret);
+    return virAccessManagerSanitizeError(ret, driverName);
 }
 
 int virAccessManagerCheckStorageVol(virAccessManagerPtr manager,
@@ -354,5 +356,5 @@ int virAccessManagerCheckStorageVol(virAccessManagerPtr manager,
     if (manager->drv->checkStorageVol)
         ret = manager->drv->checkStorageVol(manager, driverName, pool, vol, perm);
 
-    return virAccessManagerSanitizeError(ret);
+    return virAccessManagerSanitizeError(ret, driverName);
 }
diff --git a/src/rpc/gendispatch.pl b/src/rpc/gendispatch.pl
index 0c4648c0fb..a8b9f5aeca 100755
--- a/src/rpc/gendispatch.pl
+++ b/src/rpc/gendispatch.pl
@@ -2199,7 +2199,8 @@ elsif ($mode eq "client") {
                     print "        virObjectUnref(mgr);\n";
                     if ($action eq "Ensure") {
                         print "        if (rv == 0)\n";
-                        print "            virReportError(VIR_ERR_ACCESS_DENIED, NULL);\n";
+                        print "            virReportError(VIR_ERR_ACCESS_DENIED,\n";
+                        print"                            _(\"'%s' denied access\"), conn->driver->name);\n";
                         print "        return $fail;\n";
                     } else {
                         print "        virResetLastError();\n";
-- 
2.17.2