[Qemu-block] [PATCH v4 06/28] opts-visitor: Favor new visit_free() function

[Eric Blake]

Now that we have a polymorphic visit_free(), we no longer need
opts_visitor_cleanup(); which in turn means we no longer need
to return a subtype from opts_visitor_new() nor a public upcast
function.

Signed-off-by: Eric Blake <address@hidden>

---
v4: new patch
---
 include/qapi/opts-visitor.h |  4 +---
 block/crypto.c              | 30 ++++++++++++++----------------
 hmp.c                       |  8 ++++----
 hw/acpi/core.c              |  8 ++++----
 net/net.c                   |  5 ++---
 numa.c                      |  6 +++---
 qapi/opts-visitor.c         | 26 ++++++--------------------
 qom/object_interfaces.c     |  8 ++++----
 tests/test-opts-visitor.c   |  9 ++++-----
 9 files changed, 42 insertions(+), 62 deletions(-)

diff --git a/include/qapi/opts-visitor.h b/include/qapi/opts-visitor.h
index ae1bf7c..6462c96 100644
--- a/include/qapi/opts-visitor.h
+++ b/include/qapi/opts-visitor.h
@@ -35,8 +35,6 @@ typedef struct OptsVisitor OptsVisitor;
  * QTypes.  It also requires a non-null list argument to
  * visit_start_list().
  */
-OptsVisitor *opts_visitor_new(const QemuOpts *opts);
-void opts_visitor_cleanup(OptsVisitor *nv);
-Visitor *opts_get_visitor(OptsVisitor *nv);
+Visitor *opts_visitor_new(const QemuOpts *opts);

 #endif
diff --git a/block/crypto.c b/block/crypto.c
index 5f0ab4d..9bb55d3 100644
--- a/block/crypto.c
+++ b/block/crypto.c
@@ -193,17 +193,16 @@ block_crypto_open_opts_init(QCryptoBlockFormat format,
                             QemuOpts *opts,
                             Error **errp)
 {
-    OptsVisitor *ov;
+    Visitor *v;
     QCryptoBlockOpenOptions *ret = NULL;
     Error *local_err = NULL;

     ret = g_new0(QCryptoBlockOpenOptions, 1);
     ret->format = format;

-    ov = opts_visitor_new(opts);
+    v = opts_visitor_new(opts);

-    visit_start_struct(opts_get_visitor(ov),
-                       NULL, NULL, 0, &local_err);
+    visit_start_struct(v, NULL, NULL, 0, &local_err);
     if (local_err) {
         goto out;
     }
@@ -211,7 +210,7 @@ block_crypto_open_opts_init(QCryptoBlockFormat format,
     switch (format) {
     case Q_CRYPTO_BLOCK_FORMAT_LUKS:
         visit_type_QCryptoBlockOptionsLUKS_members(
-            opts_get_visitor(ov), &ret->u.luks, &local_err);
+            v, &ret->u.luks, &local_err);
         break;

     default:
@@ -219,10 +218,10 @@ block_crypto_open_opts_init(QCryptoBlockFormat format,
         break;
     }
     if (!local_err) {
-        visit_check_struct(opts_get_visitor(ov), &local_err);
+        visit_check_struct(v, &local_err);
     }

-    visit_end_struct(opts_get_visitor(ov), NULL);
+    visit_end_struct(v, NULL);

  out:
     if (local_err) {
@@ -230,7 +229,7 @@ block_crypto_open_opts_init(QCryptoBlockFormat format,
         qapi_free_QCryptoBlockOpenOptions(ret);
         ret = NULL;
     }
-    opts_visitor_cleanup(ov);
+    visit_free(v);
     return ret;
 }

@@ -240,17 +239,16 @@ block_crypto_create_opts_init(QCryptoBlockFormat format,
                               QemuOpts *opts,
                               Error **errp)
 {
-    OptsVisitor *ov;
+    Visitor *v;
     QCryptoBlockCreateOptions *ret = NULL;
     Error *local_err = NULL;

     ret = g_new0(QCryptoBlockCreateOptions, 1);
     ret->format = format;

-    ov = opts_visitor_new(opts);
+    v = opts_visitor_new(opts);

-    visit_start_struct(opts_get_visitor(ov),
-                       NULL, NULL, 0, &local_err);
+    visit_start_struct(v, NULL, NULL, 0, &local_err);
     if (local_err) {
         goto out;
     }
@@ -258,7 +256,7 @@ block_crypto_create_opts_init(QCryptoBlockFormat format,
     switch (format) {
     case Q_CRYPTO_BLOCK_FORMAT_LUKS:
         visit_type_QCryptoBlockCreateOptionsLUKS_members(
-            opts_get_visitor(ov), &ret->u.luks, &local_err);
+            v, &ret->u.luks, &local_err);
         break;

     default:
@@ -266,10 +264,10 @@ block_crypto_create_opts_init(QCryptoBlockFormat format,
         break;
     }
     if (!local_err) {
-        visit_check_struct(opts_get_visitor(ov), &local_err);
+        visit_check_struct(v, &local_err);
     }

-    visit_end_struct(opts_get_visitor(ov), NULL);
+    visit_end_struct(v, NULL);

  out:
     if (local_err) {
@@ -277,7 +275,7 @@ block_crypto_create_opts_init(QCryptoBlockFormat format,
         qapi_free_QCryptoBlockCreateOptions(ret);
         ret = NULL;
     }
-    opts_visitor_cleanup(ov);
+    visit_free(v);
     return ret;
 }

diff --git a/hmp.c b/hmp.c
index d510236..eef208c 100644
--- a/hmp.c
+++ b/hmp.c
@@ -1675,7 +1675,7 @@ void hmp_object_add(Monitor *mon, const QDict *qdict)
 {
     Error *err = NULL;
     QemuOpts *opts;
-    OptsVisitor *ov;
+    Visitor *v;
     Object *obj = NULL;

     opts = qemu_opts_from_qdict(qemu_find_opts("object"), qdict, &err);
@@ -1684,9 +1684,9 @@ void hmp_object_add(Monitor *mon, const QDict *qdict)
         return;
     }

-    ov = opts_visitor_new(opts);
-    obj = user_creatable_add(qdict, opts_get_visitor(ov), &err);
-    opts_visitor_cleanup(ov);
+    v = opts_visitor_new(opts);
+    obj = user_creatable_add(qdict, v, &err);
+    visit_free(v);
     qemu_opts_del(opts);

     if (err) {
diff --git a/hw/acpi/core.c b/hw/acpi/core.c
index 6a2f452..1303f51 100644
--- a/hw/acpi/core.c
+++ b/hw/acpi/core.c
@@ -239,11 +239,11 @@ void acpi_table_add(const QemuOpts *opts, Error **errp)
     char unsigned *blob = NULL;

     {
-        OptsVisitor *ov;
+        Visitor *v;

-        ov = opts_visitor_new(opts);
-        visit_type_AcpiTableOptions(opts_get_visitor(ov), NULL, &hdrs, &err);
-        opts_visitor_cleanup(ov);
+        v = opts_visitor_new(opts);
+        visit_type_AcpiTableOptions(v, NULL, &hdrs, &err);
+        visit_free(v);
     }

     if (err) {
diff --git a/net/net.c b/net/net.c
index 0ad6217..b411770 100644
--- a/net/net.c
+++ b/net/net.c
@@ -1026,8 +1026,7 @@ int net_client_init(QemuOpts *opts, int is_netdev, Error 
**errp)
     void *object = NULL;
     Error *err = NULL;
     int ret = -1;
-    OptsVisitor *ov = opts_visitor_new(opts);
-    Visitor *v = opts_get_visitor(ov);
+    Visitor *v = opts_visitor_new(opts);

     {
         /* Parse convenience option format ip6-net=fec0::0[/64] */
@@ -1077,7 +1076,7 @@ int net_client_init(QemuOpts *opts, int is_netdev, Error 
**errp)
     }

     error_propagate(errp, err);
-    opts_visitor_cleanup(ov);
+    visit_free(v);
     return ret;
 }

diff --git a/numa.c b/numa.c
index 572712c..cbae430 100644
--- a/numa.c
+++ b/numa.c
@@ -217,9 +217,9 @@ static int parse_numa(void *opaque, QemuOpts *opts, Error 
**errp)
     Error *err = NULL;

     {
-        OptsVisitor *ov = opts_visitor_new(opts);
-        visit_type_NumaOptions(opts_get_visitor(ov), NULL, &object, &err);
-        opts_visitor_cleanup(ov);
+        Visitor *v = opts_visitor_new(opts);
+        visit_type_NumaOptions(v, NULL, &object, &err);
+        visit_free(v);
     }

     if (err) {
diff --git a/qapi/opts-visitor.c b/qapi/opts-visitor.c
index 28d2203..6e65317 100644
--- a/qapi/opts-visitor.c
+++ b/qapi/opts-visitor.c
@@ -517,11 +517,15 @@ static void
 opts_free(Visitor *v)
 {
     OptsVisitor *ov = to_ov(v);
-    opts_visitor_cleanup(ov);
+    if (ov->unprocessed_opts != NULL) {
+        g_hash_table_destroy(ov->unprocessed_opts);
+    }
+    g_free(ov->fake_id_opt);
+    g_free(ov);
 }


-OptsVisitor *
+Visitor *
 opts_visitor_new(const QemuOpts *opts)
 {
     OptsVisitor *ov;
@@ -552,23 +556,5 @@ opts_visitor_new(const QemuOpts *opts)

     ov->opts_root = opts;

-    return ov;
-}
-
-
-void
-opts_visitor_cleanup(OptsVisitor *ov)
-{
-    if (ov->unprocessed_opts != NULL) {
-        g_hash_table_destroy(ov->unprocessed_opts);
-    }
-    g_free(ov->fake_id_opt);
-    g_free(ov);
-}
-
-
-Visitor *
-opts_get_visitor(OptsVisitor *ov)
-{
     return &ov->visitor;
 }
diff --git a/qom/object_interfaces.c b/qom/object_interfaces.c
index 926ec68..bf59846 100644
--- a/qom/object_interfaces.c
+++ b/qom/object_interfaces.c
@@ -156,15 +156,15 @@ out:

 Object *user_creatable_add_opts(QemuOpts *opts, Error **errp)
 {
-    OptsVisitor *ov;
+    Visitor *v;
     QDict *pdict;
     Object *obj = NULL;

-    ov = opts_visitor_new(opts);
+    v = opts_visitor_new(opts);
     pdict = qemu_opts_to_qdict(opts, NULL);

-    obj = user_creatable_add(pdict, opts_get_visitor(ov), errp);
-    opts_visitor_cleanup(ov);
+    obj = user_creatable_add(pdict, v, errp);
+    visit_free(v);
     QDECREF(pdict);
     return obj;
 }
diff --git a/tests/test-opts-visitor.c b/tests/test-opts-visitor.c
index 008e677..f46d902 100644
--- a/tests/test-opts-visitor.c
+++ b/tests/test-opts-visitor.c
@@ -38,16 +38,15 @@ setup_fixture(OptsVisitorFixture *f, gconstpointer 
test_data)
 {
     const char *opts_string = test_data;
     QemuOpts *opts;
-    OptsVisitor *ov;
+    Visitor *v;

     opts = qemu_opts_parse(qemu_find_opts("userdef"), opts_string, false,
                            NULL);
     g_assert(opts != NULL);

-    ov = opts_visitor_new(opts);
-    visit_type_UserDefOptions(opts_get_visitor(ov), NULL, &f->userdef,
-                              &f->err);
-    opts_visitor_cleanup(ov);
+    v = opts_visitor_new(opts);
+    visit_type_UserDefOptions(v, NULL, &f->userdef, &f->err);
+    visit_free(v);
     qemu_opts_del(opts);
 }

-- 
2.5.5