bcache: Add bch_btree_keys_u64s_remaining()

Helper function to explicitly check how much space is free in a btree node Signed-off-by: Kent Overstreet <kmo@daterainc.com>
2013-11-11 19:03:54 -08:00
parent a85e968e66
commit 59158fde42
3 changed files with 31 additions and 13 deletions
--- a/include/uapi/linux/bcache.h
+++ b/include/uapi/linux/bcache.h
@@ -39,6 +39,7 @@ static inline void SET_##name(struct bkey *k, unsigned i, __u64 v)	\
 }

 #define KEY_SIZE_BITS		16
+#define KEY_MAX_U64S		8

 KEY_FIELD(KEY_PTRS,	high, 60, 3)
 KEY_FIELD(HEADER_SIZE,	high, 58, 2)