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

[fs/lustre-release.git] / lustre / lod / lod_object.c

diff --git a/lustre/lod/lod_object.c b/lustre/lod/lod_object.c
index 1fa0ffb..fb8ea42 100644 (file)
--- a/lustre/lod/lod_object.c
+++ b/lustre/lod/lod_object.c
@@ -3236,6 +3236,7 @@ static int lod_declare_layout_merge(const struct lu_env *env,
        struct lov_comp_md_v1   *cur_lcm;
        struct lov_comp_md_v1   *merge_lcm;
        struct lov_comp_md_entry_v1     *lcme;
+       struct lov_mds_md_v1 *lmm;
        size_t size = 0;
        size_t offset;
        __u16 cur_entry_count;
@@ -3244,6 +3245,8 @@ static int lod_declare_layout_merge(const struct lu_env *env,
        __u16 mirror_id = 0;
        __u32 mirror_count;
        int     rc, i;
+       bool merge_has_dom;
+
        ENTRY;
 
        merge_lcm = mbuf->lb_buf;
@@ -3331,6 +3334,13 @@ static int lod_declare_layout_merge(const struct lu_env *env,
        }
 
        mirror_id = mirror_id_of(id) + 1;
+
+       /* check if first entry in new layout is DOM */
+       lmm = (struct lov_mds_md_v1 *)((char *)merge_lcm +
+                                       merge_lcm->lcm_entries[0].lcme_offset);
+       merge_has_dom = lov_pattern(le32_to_cpu(lmm->lmm_pattern)) ==
+                       LOV_PATTERN_MDT;
+
        for (i = 0; i < merge_entry_count; i++) {
                struct lov_comp_md_entry_v1 *merge_lcme;
 
@@ -3339,6 +3349,8 @@ static int lod_declare_layout_merge(const struct lu_env *env,
 
                *lcme = *merge_lcme;
                lcme->lcme_offset = cpu_to_le32(offset);
+               if (merge_has_dom && i == 0)
+                       lcme->lcme_flags |= cpu_to_le32(LCME_FL_STALE);
 
                id = pflr_id(mirror_id, i + 1);
                lcme->lcme_id = cpu_to_le32(id);