2619 asynchronous destruction of ZFS file systems
2747 SPA versioning with zfs feature flags
Reviewed by: Matt Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <gwilson@delphix.com>
Reviewed by: Richard Lowe <richlowe@richlowe.net>
Reviewed by: Dan Kruchinin <dan.kruchinin@gmail.com>
Approved by: Dan McDonald <danmcd@nexenta.com>

*** 16,27 ****
--- 16,29 ----
   * fields enclosed by brackets "[]" replaced with your own identifying
   * information: Portions Copyright [yyyy] [name of copyright owner]
   *
   * CDDL HEADER END
   */
+ 
  /*
   * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+  * Copyright (c) 2012 by Delphix. All rights reserved.
   */
  
  /*
   * This file contains the functions which analyze the status of a pool.  This
   * include both the status of an active pool, as well as the status exported
*** 212,221 ****
--- 214,237 ----
          if (vs->vs_state == VDEV_STATE_CANT_OPEN &&
              vs->vs_aux == VDEV_AUX_VERSION_NEWER)
                  return (ZPOOL_STATUS_VERSION_NEWER);
  
          /*
+          * Unsupported feature(s).
+          */
+         if (vs->vs_state == VDEV_STATE_CANT_OPEN &&
+             vs->vs_aux == VDEV_AUX_UNSUP_FEAT) {
+                 nvlist_t *nvinfo;
+ 
+                 verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_LOAD_INFO,
+                     &nvinfo) == 0);
+                 if (nvlist_exists(nvinfo, ZPOOL_CONFIG_CAN_RDONLY))
+                         return (ZPOOL_STATUS_UNSUP_FEAT_WRITE);
+                 return (ZPOOL_STATUS_UNSUP_FEAT_READ);
+         }
+ 
+         /*
           * Check that the config is complete.
           */
          if (vs->vs_state == VDEV_STATE_CANT_OPEN &&
              vs->vs_aux == VDEV_AUX_BAD_GUID_SUM)
                  return (ZPOOL_STATUS_BAD_GUID_SUM);
*** 298,308 ****
                  return (ZPOOL_STATUS_REMOVED_DEV);
  
          /*
           * Outdated, but usable, version
           */
!         if (version < SPA_VERSION)
                  return (ZPOOL_STATUS_VERSION_OLDER);
  
          return (ZPOOL_STATUS_OK);
  }
  
--- 314,324 ----
                  return (ZPOOL_STATUS_REMOVED_DEV);
  
          /*
           * Outdated, but usable, version
           */
!         if (SPA_VERSION_IS_SUPPORTED(version) && version != SPA_VERSION)
                  return (ZPOOL_STATUS_VERSION_OLDER);
  
          return (ZPOOL_STATUS_OK);
  }