LU-13415 dom: use DoM optimization for DOM+OST 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 820b6af..3e868bd 100644 (file)
--- a/lustre/mdt/mdt_internal.h
+++ b/lustre/mdt/mdt_internal.h
@@ -658,52 +658,19 @@ static inline bool mdt_is_striped_client(struct obd_export *exp)
        return exp_connect_flags(exp) & OBD_CONNECT_DIR_STRIPE;
 }
 
-enum {
-       LMM_NO_DOM,
-       LMM_DOM_ONLY,
-       LMM_DOM_OST
-};
+__u32 mdt_lmm_dom_entry_check(struct lov_mds_md *lmm, int *dom_only);
 
-/* XXX Look into layout in MDT layer. This must be done in LOD. */
-static inline int mdt_lmm_dom_entry(struct lov_mds_md *lmm)
+static inline bool mdt_lmm_dom_only(struct lov_mds_md *lmm)
 {
-       struct lov_comp_md_v1 *comp_v1;
-       struct lov_mds_md *v1;
-       __u32 off;
-       bool has_dom = false, has_ost = false;
-       int i;
-
-       if (le32_to_cpu(lmm->lmm_magic) != LOV_MAGIC_COMP_V1)
-               return LMM_NO_DOM;
-
-       comp_v1 = (struct lov_comp_md_v1 *)lmm;
-       off = le32_to_cpu(comp_v1->lcm_entries[0].lcme_offset);
-       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 &&
-           le16_to_cpu(comp_v1->lcm_mirror_count) == 0)
-               return LMM_NO_DOM;
-
-       for (i = 0; i < le16_to_cpu(comp_v1->lcm_entry_count); i++) {
-               struct lov_comp_md_entry_v1 *lcme;
-
-               lcme = &comp_v1->lcm_entries[i];
-               if (!(le32_to_cpu(lcme->lcme_flags) & LCME_FL_INIT))
-                       continue;
+       int dom_only = 0;
 
-               off = le32_to_cpu(lcme->lcme_offset);
-               v1 = (struct lov_mds_md *)((char *)comp_v1 + off);
+       mdt_lmm_dom_entry_check(lmm, &dom_only);
+       return dom_only;
+}
 
-               if (lov_pattern(le32_to_cpu(v1->lmm_pattern)) ==
-                   LOV_PATTERN_MDT)
-                       has_dom = true;
-               else
-                       has_ost = true;
-               if (has_dom && has_ost)
-                       return LMM_DOM_OST;
-       }
-       return has_dom ? LMM_DOM_ONLY : LMM_NO_DOM;
+static inline __u32 mdt_lmm_dom_stripesize(struct lov_mds_md *lmm)
+{
+       return mdt_lmm_dom_entry_check(lmm, NULL);
 }
 
 static inline bool mdt_lmm_is_flr(struct lov_mds_md *lmm)