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-rw-r--r--fs/btrfs/hash.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/btrfs/hash.h b/fs/btrfs/hash.h
index db2ff9773b9..1d982812ab6 100644
--- a/fs/btrfs/hash.h
+++ b/fs/btrfs/hash.h
@@ -24,4 +24,14 @@ static inline u64 btrfs_name_hash(const char *name, int len)
{
return crc32c((u32)~1, name, len);
}
+
+/*
+ * Figure the key offset of an extended inode ref
+ */
+static inline u64 btrfs_extref_hash(u64 parent_objectid, const char *name,
+ int len)
+{
+ return (u64) crc32c(parent_objectid, name, len);
+}
+
#endif