3 files changed, 21 insertions, 11 deletions

diff --git a/usr/src/uts/common/fs/zfs/spa.c b/usr/src/uts/common/fs/zfs/spa.c
index 828d5e2666..9c4af11134 100644
--- a/usr/src/uts/common/fs/zfs/spa.c
+++ b/usr/src/uts/common/fs/zfs/spa.c
@@ -2149,7 +2149,7 @@ spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config,
 
 	if (spa_version(spa) >= SPA_VERSION_FEATURES) {
 		boolean_t missing_feat_read = B_FALSE;
-		nvlist_t *unsup_feat;
+		nvlist_t *unsup_feat, *enabled_feat;
 
 		if (spa_dir_prop(spa, DMU_POOL_FEATURES_FOR_READ,
 		    &spa->spa_feat_for_read_obj) != 0) {
@@ -2166,27 +2166,32 @@ spa_load_impl(spa_t *spa, uint64_t pool_guid, nvlist_t *config,
 			return (spa_vdev_err(rvd, VDEV_AUX_CORRUPT_DATA, EIO));
 		}
 
-		VERIFY(nvlist_alloc(&unsup_feat, NV_UNIQUE_NAME, KM_SLEEP) ==
-		    0);
+		enabled_feat = fnvlist_alloc();
+		unsup_feat = fnvlist_alloc();
 
 		if (!feature_is_supported(spa->spa_meta_objset,
 		    spa->spa_feat_for_read_obj, spa->spa_feat_desc_obj,
-		    unsup_feat))
+		    unsup_feat, enabled_feat))
 			missing_feat_read = B_TRUE;
 
 		if (spa_writeable(spa) || state == SPA_LOAD_TRYIMPORT) {
 			if (!feature_is_supported(spa->spa_meta_objset,
 			    spa->spa_feat_for_write_obj, spa->spa_feat_desc_obj,
-			    unsup_feat))
+			    unsup_feat, enabled_feat)) {
 				missing_feat_write = B_TRUE;
+			}
 		}
 
+		fnvlist_add_nvlist(spa->spa_load_info,
+		    ZPOOL_CONFIG_ENABLED_FEAT, enabled_feat);
+
 		if (!nvlist_empty(unsup_feat)) {
-			VERIFY(nvlist_add_nvlist(spa->spa_load_info,
-			    ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat) == 0);
+			fnvlist_add_nvlist(spa->spa_load_info,
+			    ZPOOL_CONFIG_UNSUP_FEAT, unsup_feat);
 		}
 
-		nvlist_free(unsup_feat);
+		fnvlist_free(enabled_feat);
+		fnvlist_free(unsup_feat);
 
 		if (!missing_feat_read) {
 			fnvlist_add_boolean(spa->spa_load_info,
diff --git a/usr/src/uts/common/fs/zfs/sys/zfeature.h b/usr/src/uts/common/fs/zfs/sys/zfeature.h
index 9ff1c93df7..481e85b1ba 100644
--- a/usr/src/uts/common/fs/zfs/sys/zfeature.h
+++ b/usr/src/uts/common/fs/zfs/sys/zfeature.h
@@ -35,7 +35,7 @@ extern "C" {
 #endif
 
 extern boolean_t feature_is_supported(objset_t *os, uint64_t obj,
-    uint64_t desc_obj, nvlist_t *unsup_feat);
+    uint64_t desc_obj, nvlist_t *unsup_feat, nvlist_t *enabled_feat);
 
 struct spa;
 extern void spa_feature_create_zap_objects(struct spa *, dmu_tx_t *);
diff --git a/usr/src/uts/common/fs/zfs/zfeature.c b/usr/src/uts/common/fs/zfs/zfeature.c
index ba722088a4..b9250df4a9 100644
--- a/usr/src/uts/common/fs/zfs/zfeature.c
+++ b/usr/src/uts/common/fs/zfs/zfeature.c
@@ -173,7 +173,7 @@ typedef enum {
  */
 boolean_t
 feature_is_supported(objset_t *os, uint64_t obj, uint64_t desc_obj,
-    nvlist_t *unsup_feat)
+    nvlist_t *unsup_feat, nvlist_t *enabled_feat)
 {
 	boolean_t supported;
 	zap_cursor_t zc;
@@ -186,11 +186,16 @@ feature_is_supported(objset_t *os, uint64_t obj, uint64_t desc_obj,
 		ASSERT(za.za_integer_length == sizeof (uint64_t) &&
 		    za.za_num_integers == 1);
 
+		if (NULL != enabled_feat) {
+			fnvlist_add_uint64(enabled_feat, za.za_name,
+			    za.za_first_integer);
+		}
+
 		if (za.za_first_integer != 0 &&
 		    !zfeature_is_supported(za.za_name)) {
 			supported = B_FALSE;
 
-			if (unsup_feat != NULL) {
+			if (NULL != unsup_feat) {
 				char *desc = "";
 				char buf[MAXPATHLEN];