+
+/*
+ * Export handle<->flock hash operations.
+ */
+static unsigned
+ldlm_export_flock_hash(cfs_hash_t *hs, const void *key, unsigned mask)
+{
+ return cfs_hash_u64_hash(*(__u64 *)key, mask);
+}
+
+static void *
+ldlm_export_flock_key(cfs_hlist_node_t *hnode)
+{
+ struct ldlm_lock *lock;
+
+ lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_flock_hash);
+ return &lock->l_policy_data.l_flock.owner;
+}
+
+static int
+ldlm_export_flock_keycmp(const void *key, cfs_hlist_node_t *hnode)
+{
+ return !memcmp(ldlm_export_flock_key(hnode), key, sizeof(__u64));
+}
+
+static void *
+ldlm_export_flock_object(cfs_hlist_node_t *hnode)
+{
+ return cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_flock_hash);
+}
+
+static void
+ldlm_export_flock_get(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
+{
+ struct ldlm_lock *lock;
+ struct ldlm_flock *flock;
+
+ lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_flock_hash);
+ LDLM_LOCK_GET(lock);
+
+ flock = &lock->l_policy_data.l_flock;
+ LASSERT(flock->blocking_export != NULL);
+ class_export_get(flock->blocking_export);
+ flock->blocking_refs++;
+}
+
+static void
+ldlm_export_flock_put(cfs_hash_t *hs, cfs_hlist_node_t *hnode)
+{
+ struct ldlm_lock *lock;
+ struct ldlm_flock *flock;
+
+ lock = cfs_hlist_entry(hnode, struct ldlm_lock, l_exp_flock_hash);
+ LDLM_LOCK_RELEASE(lock);
+
+ flock = &lock->l_policy_data.l_flock;
+ LASSERT(flock->blocking_export != NULL);
+ class_export_put(flock->blocking_export);
+ if (--flock->blocking_refs == 0) {
+ flock->blocking_owner = 0;
+ flock->blocking_export = NULL;
+ }
+}
+
+static cfs_hash_ops_t ldlm_export_flock_ops = {
+ .hs_hash = ldlm_export_flock_hash,
+ .hs_key = ldlm_export_flock_key,
+ .hs_keycmp = ldlm_export_flock_keycmp,
+ .hs_object = ldlm_export_flock_object,
+ .hs_get = ldlm_export_flock_get,
+ .hs_put = ldlm_export_flock_put,
+ .hs_put_locked = ldlm_export_flock_put,
+};
+
+int ldlm_init_flock_export(struct obd_export *exp)
+{
+ exp->exp_flock_hash =
+ cfs_hash_create(obd_uuid2str(&exp->exp_client_uuid),
+ HASH_EXP_LOCK_CUR_BITS,
+ HASH_EXP_LOCK_MAX_BITS,
+ HASH_EXP_LOCK_BKT_BITS, 0,
+ CFS_HASH_MIN_THETA, CFS_HASH_MAX_THETA,
+ &ldlm_export_flock_ops,
+ CFS_HASH_DEFAULT | CFS_HASH_NBLK_CHANGE);
+ if (!exp->exp_flock_hash)
+ RETURN(-ENOMEM);
+
+ RETURN(0);
+}
+EXPORT_SYMBOL(ldlm_init_flock_export);
+
+void ldlm_destroy_flock_export(struct obd_export *exp)
+{
+ ENTRY;
+ if (exp->exp_flock_hash) {
+ cfs_hash_putref(exp->exp_flock_hash);
+ exp->exp_flock_hash = NULL;
+ }
+ EXIT;
+}
+EXPORT_SYMBOL(ldlm_destroy_flock_export);