[Libvir] PATCH: Fix dir/fs storage pool when SELinux is disabled

[Daniel P. Berrange]

When SELinux is disabled  fgetfilecon() may well return -1, if a file has no
extended attribute with security context data. This causes the storage pool
to skip that file. The fix is to check whether errno is ENODATA and treat
that as an expected error case & ignore it.

Dan.

Index: src/storage_backend.c
===================================================================
RCS file: /data/cvs/libvirt/src/storage_backend.c,v
retrieving revision 1.8
diff -u -p -r1.8 storage_backend.c
--- src/storage_backend.c	27 Feb 2008 10:37:19 -0000	1.8
+++ src/storage_backend.c	14 Mar 2008 21:21:05 -0000
@@ -240,17 +240,22 @@ virStorageBackendUpdateVolInfoFD(virConn
 
 #if HAVE_SELINUX
     if (fgetfilecon(fd, &filecon) == -1) {
-        virStorageReportError(conn, VIR_ERR_INTERNAL_ERROR,
-                              _("cannot get file context of %s: %s"),
-                              vol->target.path, strerror(errno));
-        return -1;
-    }
-    vol->target.perms.label = strdup(filecon);
-    if (vol->target.perms.label == NULL) {
-        virStorageReportError(conn, VIR_ERR_NO_MEMORY, "%s", _("context"));
-        return -1;
+        if (errno != ENODATA) {
+            virStorageReportError(conn, VIR_ERR_INTERNAL_ERROR,
+                                  _("cannot get file context of %s: %s"),
+                                  vol->target.path, strerror(errno));
+            return -1;
+        } else {
+            vol->target.perms.label = NULL;
+        }
+    } else {
+        vol->target.perms.label = strdup(filecon);
+        if (vol->target.perms.label == NULL) {
+            virStorageReportError(conn, VIR_ERR_NO_MEMORY, "%s", _("context"));
+            return -1;
+        }
+        freecon(filecon);
     }
-    freecon(filecon);
 #else
     vol->target.perms.label = NULL;
 #endif


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