rbd: update feature bits
There is a new rbd feature bit defined for "fancy striping." Add
it to the ones defined in the kernel client.
Change RBD_FEATURES_ALL so it represents the set of all feature
bits (rather than just the ones we support). Define a new symbol
RBD_FEATURES_SUPPORTED to indicate the supported ones.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 11b7987..503e64f 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -73,11 +73,14 @@
/* Feature bits */
-#define RBD_FEATURE_LAYERING 1
+#define RBD_FEATURE_LAYERING (1<<0)
+#define RBD_FEATURE_STRIPINGV2 (1<<1)
+#define RBD_FEATURES_ALL \
+ (RBD_FEATURE_LAYERING | RBD_FEATURE_STRIPINGV2)
/* Features supported by this (client software) implementation. */
-#define RBD_FEATURES_ALL (0)
+#define RBD_FEATURES_SUPPORTED (0)
/*
* An RBD device name will be "rbd#", where the "rbd" comes from
@@ -2843,7 +2846,7 @@
return ret;
incompat = le64_to_cpu(features_buf.incompat);
- if (incompat & ~RBD_FEATURES_ALL)
+ if (incompat & ~RBD_FEATURES_SUPPORTED)
return -ENXIO;
*snap_features = le64_to_cpu(features_buf.features);