LU-13357 lod: implement striped directory .dio_lookup

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

diff --git a/lustre/lod/lod_object.c b/lustre/lod/lod_object.c
index 316d7ff..d38bca0 100644 (file)
--- a/lustre/lod/lod_object.c
+++ b/lustre/lod/lod_object.c
@@ -367,6 +367,50 @@ static struct dt_index_operations lod_index_ops = {
 };
 
 /**
+ * Implementation of dt_index_operations::dio_lookup
+ *
+ * Used with striped directories.
+ *
+ * \see dt_index_operations::dio_lookup() in the API description for details.
+ */
+static int lod_striped_lookup(const struct lu_env *env, struct dt_object *dt,
+                     struct dt_rec *rec, const struct dt_key *key)
+{
+       struct lod_object *lo = lod_dt_obj(dt);
+       struct dt_object *next;
+       const char *name = (const char *)key;
+
+       LASSERT(lo->ldo_dir_stripe_count > 0);
+
+       if (strcmp(name, dot) == 0) {
+               struct lu_fid *fid = (struct lu_fid *)rec;
+
+               *fid = *lod_object_fid(lo);
+               return 1;
+       }
+
+       if (strcmp(name, dotdot) == 0) {
+               next = dt_object_child(dt);
+       } else {
+               int index;
+
+               index = __lmv_name_to_stripe_index(lo->ldo_dir_hash_type,
+                                                  lo->ldo_dir_stripe_count,
+                                                  lo->ldo_dir_migrate_hash,
+                                                  lo->ldo_dir_migrate_offset,
+                                                  name, strlen(name), true);
+               if (index < 0)
+                       return index;
+
+               next = lo->ldo_stripe[index];
+               if (!next || !dt_object_exists(next))
+                       return -ENODEV;
+       }
+
+       return next->do_index_ops->dio_lookup(env, next, rec, key);
+}
+
+/**
  * Implementation of dt_it_ops::init.
  *
  * Used with striped objects. Internally just initializes the iterator
@@ -744,7 +788,7 @@ static int lod_striped_it_load(const struct lu_env *env,
 }
 
 static struct dt_index_operations lod_striped_index_ops = {
-       .dio_lookup             = lod_lookup,
+       .dio_lookup             = lod_striped_lookup,
        .dio_declare_insert     = lod_declare_insert,
        .dio_insert             = lod_insert,
        .dio_declare_delete     = lod_declare_delete,