LU-13809 mdc: fix lovea for replay

[fs/lustre-release.git] / lustre / lov / lov_ea.c

diff --git a/lustre/lov/lov_ea.c b/lustre/lov/lov_ea.c
index 17a9b7e..1498c78 100644 (file)
--- a/lustre/lov/lov_ea.c
+++ b/lustre/lov/lov_ea.c
@@ -631,3 +631,34 @@ int lov_lsm_entry(const struct lov_stripe_md *lsm, __u64 offset)
 
        return -1;
 }
+
+/**
+ * lmm_layout_gen overlaps stripe_offset field, it needs to be reset back when
+ * sending to MDT for passing striping checks
+ */
+void lov_fix_ea_for_replay(void *lovea)
+{
+       struct lov_user_md *lmm = lovea;
+       struct lov_comp_md_v1 *c1;
+       int i;
+
+       switch (le32_to_cpu(lmm->lmm_magic)) {
+       case LOV_USER_MAGIC_V1:
+       case LOV_USER_MAGIC_V3:
+               lmm->lmm_stripe_offset = LOV_OFFSET_DEFAULT;
+               break;
+
+       case LOV_USER_MAGIC_COMP_V1:
+               c1 = (void *)lmm;
+               for (i = 0; i < le16_to_cpu(c1->lcm_entry_count); i++) {
+                       struct lov_comp_md_entry_v1 *ent = &c1->lcm_entries[i];
+
+                       if (le32_to_cpu(ent->lcme_flags) & LCME_FL_INIT) {
+                               lmm = (void *)((char *)c1 +
+                                     le32_to_cpu(ent->lcme_offset));
+                               lmm->lmm_stripe_offset = LOV_OFFSET_DEFAULT;
+                       }
+               }
+       }
+}
+EXPORT_SYMBOL(lov_fix_ea_for_replay);