4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Ilya Dryomov <idryo...@gmail.com>

commit e573427a440fd67d3f522357d7ac901d59281948 upstream.

This feature bit restricts older clients from performing certain
maintenance operations against an image (e.g. clone, snap create).
krbd does not perform maintenance operations.

Cc: sta...@vger.kernel.org
Signed-off-by: Ilya Dryomov <idryo...@gmail.com>
Reviewed-by: Jason Dillaman <dilla...@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/block/rbd.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -124,11 +124,13 @@ static int atomic_dec_return_safe(atomic
 #define RBD_FEATURE_STRIPINGV2         (1ULL<<1)
 #define RBD_FEATURE_EXCLUSIVE_LOCK     (1ULL<<2)
 #define RBD_FEATURE_DATA_POOL          (1ULL<<7)
+#define RBD_FEATURE_OPERATIONS         (1ULL<<8)
 
 #define RBD_FEATURES_ALL       (RBD_FEATURE_LAYERING |         \
                                 RBD_FEATURE_STRIPINGV2 |       \
                                 RBD_FEATURE_EXCLUSIVE_LOCK |   \
-                                RBD_FEATURE_DATA_POOL)
+                                RBD_FEATURE_DATA_POOL |        \
+                                RBD_FEATURE_OPERATIONS)
 
 /* Features supported by this (client software) implementation. */
 


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