LU-11421 dom: manual OST-to-DOM migration via mirroring

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

diff --git a/lustre/mdt/mdt_internal.h b/lustre/mdt/mdt_internal.h
index 79eaf99..5a16cec 100644 (file)
--- a/lustre/mdt/mdt_internal.h
+++ b/lustre/mdt/mdt_internal.h
@@ -676,6 +676,7 @@ static inline int mdt_lmm_dom_entry(struct lov_mds_md *lmm)
        struct lov_comp_md_v1 *comp_v1;
        struct lov_mds_md *v1;
        __u32 off;
+       bool has_dom = true;
        int i;
 
        if (le32_to_cpu(lmm->lmm_magic) != LOV_MAGIC_COMP_V1)
@@ -686,15 +687,20 @@ static inline int mdt_lmm_dom_entry(struct lov_mds_md *lmm)
        v1 = (struct lov_mds_md *)((char *)comp_v1 + off);
 
        /* DoM entry is the first entry always */
-       if (lov_pattern(le32_to_cpu(v1->lmm_pattern)) != LOV_PATTERN_MDT)
+       if (lov_pattern(le32_to_cpu(v1->lmm_pattern)) != LOV_PATTERN_MDT &&
+           le16_to_cpu(comp_v1->lcm_mirror_count) == 0)
                return LMM_NO_DOM;
 
-       for (i = 1; i < le16_to_cpu(comp_v1->lcm_entry_count); i++) {
+       for (i = 0; i < le16_to_cpu(comp_v1->lcm_entry_count); i++) {
                int j;
 
                off = le32_to_cpu(comp_v1->lcm_entries[i].lcme_offset);
                v1 = (struct lov_mds_md *)((char *)comp_v1 + off);
 
+               if (lov_pattern(le32_to_cpu(v1->lmm_pattern)) ==
+                   LOV_PATTERN_MDT)
+                       has_dom = true;
+
                for (j = 0; j < le16_to_cpu(v1->lmm_stripe_count); j++) {
                        /* if there is any object on OST */
                        if (le32_to_cpu(v1->lmm_objects[j].l_ost_idx) !=
@@ -702,7 +708,7 @@ static inline int mdt_lmm_dom_entry(struct lov_mds_md *lmm)
                                return LMM_DOM_OST;
                }
        }
-       return LMM_DOM_ONLY;
+       return has_dom ? LMM_DOM_ONLY : LMM_NO_DOM;
 }
 
 static inline bool mdt_lmm_is_flr(struct lov_mds_md *lmm)