[PULL 44/51] block: Drop child_file

[Kevin Wolf <kwolf@redhat.com>]

From: Max Reitz <mreitz@redhat.com>

Signed-off-by: Max Reitz <mreitz@redhat.com>
Message-Id: <20200513110544.176672-33-mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
---
 include/block/block_int.h |  1 -
 block.c                   | 39 ++-------------------------------------
 tests/test-bdrv-drain.c   |  8 +++-----
 3 files changed, 5 insertions(+), 43 deletions(-)

diff --git a/include/block/block_int.h b/include/block/block_int.h
index e791c40496..7fbe3206b4 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -741,7 +741,6 @@ struct BdrvChildClass {
 };
 
 extern const BdrvChildClass child_of_bds;
-extern const BdrvChildClass child_file;
 
 struct BdrvChild {
     BlockDriverState *bs;
diff --git a/block.c b/block.c
index e79fe6e07e..6a24b23d51 100644
--- a/block.c
+++ b/block.c
@@ -80,13 +80,6 @@ static BlockDriverState *bdrv_open_inherit(const char *filename,
                                            BdrvChildRole child_role,
                                            Error **errp);
 
-/* TODO: Remove when no longer needed */
-static void bdrv_inherited_options(BdrvChildRole role, bool parent_is_format,
-                                   int *child_flags, QDict *child_options,
-                                   int parent_flags, QDict *parent_options);
-static void bdrv_child_cb_attach(BdrvChild *child);
-static void bdrv_child_cb_detach(BdrvChild *child);
-
 /* If non-zero, use only whitelisted block drivers */
 static int use_bdrv_whitelist;
 
@@ -1145,33 +1138,6 @@ static void bdrv_temp_snapshot_options(int *child_flags, QDict *child_options,
     *child_flags &= ~BDRV_O_NATIVE_AIO;
 }
 
-/*
- * Returns the options and flags that bs->file should get if a protocol driver
- * is expected, based on the given options and flags for the parent BDS
- */
-static void bdrv_protocol_options(BdrvChildRole role, bool parent_is_format,
-                                  int *child_flags, QDict *child_options,
-                                  int parent_flags, QDict *parent_options)
-{
-    bdrv_inherited_options(BDRV_CHILD_IMAGE, true,
-                           child_flags, child_options,
-                           parent_flags, parent_options);
-}
-
-const BdrvChildClass child_file = {
-    .parent_is_bds   = true,
-    .get_parent_desc = bdrv_child_get_parent_desc,
-    .inherit_options = bdrv_protocol_options,
-    .drained_begin   = bdrv_child_cb_drained_begin,
-    .drained_poll    = bdrv_child_cb_drained_poll,
-    .drained_end     = bdrv_child_cb_drained_end,
-    .attach          = bdrv_child_cb_attach,
-    .detach          = bdrv_child_cb_detach,
-    .inactivate      = bdrv_child_cb_inactivate,
-    .can_set_aio_ctx = bdrv_child_cb_can_set_aio_ctx,
-    .set_aio_ctx     = bdrv_child_cb_set_aio_ctx,
-};
-
 static void bdrv_backing_attach(BdrvChild *c)
 {
     BlockDriverState *parent = c->opaque;
@@ -2444,9 +2410,8 @@ static void bdrv_default_perms_for_storage(BlockDriverState *bs, BdrvChild *c,
 {
     int flags;
 
-    assert(child_class == &child_file ||
-           (child_class == &child_of_bds &&
-            (role & (BDRV_CHILD_METADATA | BDRV_CHILD_DATA))));
+    assert(child_class == &child_of_bds &&
+           (role & (BDRV_CHILD_METADATA | BDRV_CHILD_DATA)));
 
     flags = bdrv_reopen_get_flags(reopen_queue, bs);
 
diff --git a/tests/test-bdrv-drain.c b/tests/test-bdrv-drain.c
index 0da5a3a6a1..655fd0d085 100644
--- a/tests/test-bdrv-drain.c
+++ b/tests/test-bdrv-drain.c
@@ -93,12 +93,10 @@ static void bdrv_test_child_perm(BlockDriverState *bs, BdrvChild *c,
                                  uint64_t *nperm, uint64_t *nshared)
 {
     /*
-     * bdrv_default_perms() accepts only these two, so disguise
-     * detach_by_driver_cb_parent as one of them.
+     * bdrv_default_perms() accepts nothing else, so disguise
+     * detach_by_driver_cb_parent.
      */
-    if (child_class != &child_file && child_class != &child_of_bds) {
-        child_class = &child_of_bds;
-    }
+    child_class = &child_of_bds;
 
     bdrv_default_perms(bs, c, child_class, role, reopen_queue,
                        perm, shared, nperm, nshared);
-- 
2.25.4