LU-3345 llapi: add user space method for lov_user_md

[fs/lustre-release.git] / lustre / include / lustre / lustre_user.h

diff --git a/lustre/include/lustre/lustre_user.h b/lustre/include/lustre/lustre_user.h
index 4b74f94..9de0815 100644 (file)
--- a/lustre/include/lustre/lustre_user.h
+++ b/lustre/include/lustre/lustre_user.h
@@ -358,6 +358,16 @@ struct lov_user_md_v3 {           /* LOV EA user data (host-endian) */
        struct lov_user_ost_data_v1 lmm_objects[0]; /* per-stripe data */
 } __attribute__((packed));
 
+static inline __u32 lov_user_md_size(__u16 stripes, __u32 lmm_magic)
+{
+       if (lmm_magic == LOV_USER_MAGIC_V3)
+               return sizeof(struct lov_user_md_v3) +
+                               stripes * sizeof(struct lov_user_ost_data_v1);
+       else
+               return sizeof(struct lov_user_md_v1) +
+                               stripes * sizeof(struct lov_user_ost_data_v1);
+}
+
 /* Compile with -D_LARGEFILE64_SOURCE or -D_GNU_SOURCE (or #define) to
  * use this.  It is unsafe to #define those values in this header as it
  * is possible the application has already #included <sys/stat.h>. */