Integrated Edon-R hash function.

@@ -2389,10 +2389,44 @@
                         (void) zfs_ioc_userspace_upgrade(zc);
                         kmem_free(zc, sizeof (zfs_cmd_t));
                 }
                 break;
         }
+        case ZFS_PROP_CHECKSUM:
+        {
+                if (intval == ZIO_CHECKSUM_EDONR512_256) {
+                        zfeature_info_t *feature =
+                            &spa_feature_table[SPA_FEATURE_EDONR_CKSUM];
+                        spa_t *spa;
+                        dsl_pool_t *dp;
+
+                        if ((err = spa_open(dsname, &spa, FTAG)) != 0)
+                                return (err);
+
+                        dp = spa->spa_dsl_pool;
+
+                        /*
+                         * Setting the Edon-R checksum algorithm activates
+                         * the feature.
+                         */
+                        if (!spa_feature_is_active(spa, feature)) {
+                                if ((err = zfs_prop_activate_feature(dp,
+                                    feature)) != 0) {
+                                        spa_close(spa, FTAG);
+                                        return (err);
+                                }
+                        }
+
+                        spa_close(spa, FTAG);
+                }
+                /*
+                 * We still want the default set action to be performed in the
+                 * caller, we only performed zfeature settings here.
+                 */
+                err = -1;
+                break;
+        }
         case ZFS_PROP_COMPRESSION:
         {
                 if (intval == ZIO_COMPRESS_LZ4) {
                         zfeature_info_t *feature =
                             &spa_feature_table[SPA_FEATURE_LZ4_COMPRESS];

@@ -3647,10 +3681,29 @@
 
         /*
          * Check that this value is valid for this pool version
          */
         switch (prop) {
+        case ZFS_PROP_CHECKSUM:
+                if (nvpair_type(pair) == DATA_TYPE_UINT64 &&
+                    nvpair_value_uint64(pair, &intval) == 0) {
+                        if (intval == ZIO_CHECKSUM_EDONR512_256) {
+                                zfeature_info_t *feature =
+                                    &spa_feature_table[SPA_FEATURE_EDONR_CKSUM];
+                                spa_t *spa;
+
+                                if ((err = spa_open(dsname, &spa, FTAG)) != 0)
+                                        return (err);
+
+                                if (!spa_feature_is_enabled(spa, feature)) {
+                                        spa_close(spa, FTAG);
+                                        return (ENOTSUP);
+                                }
+                                spa_close(spa, FTAG);
+                        }
+                }
+                break;
         case ZFS_PROP_COMPRESSION:
                 /*
                  * If the user specified gzip compression, make sure
                  * the SPA supports it. We ignore any errors here since
                  * we'll catch them later.