LU-10286 mdt: deny 2.10 clients to open mirrored files

[fs/lustre-release.git] / lustre / mdt / mdt_internal.h

diff --git a/lustre/mdt/mdt_internal.h b/lustre/mdt/mdt_internal.h
index 3c2f60e..414cc81 100644 (file)
--- a/lustre/mdt/mdt_internal.h
+++ b/lustre/mdt/mdt_internal.h
@@ -666,6 +666,14 @@ static inline int mdt_lmm_dom_entry(struct lov_mds_md *lmm)
        return LMM_NO_DOM;
 }
 
+static inline bool mdt_lmm_is_flr(struct lov_mds_md *lmm)
+{
+       struct lov_comp_md_v1 *lcm = (typeof(lcm))lmm;
+
+       return le32_to_cpu(lmm->lmm_magic) == LOV_MAGIC_COMP_V1 &&
+              le16_to_cpu(lcm->lcm_mirror_count) > 0;
+}
+
 __u64 mdt_get_disposition(struct ldlm_reply *rep, __u64 op_flag);
 void mdt_set_disposition(struct mdt_thread_info *info,
                         struct ldlm_reply *rep, __u64 op_flag);