Documentation: create/move s390x documentation

[thirdparty/qemu.git] / block.c

diff --git a/block.c b/block.c
index 957630b1c5d5b3ac8fca92537daec7b3f7131b34..a2542c977b91a7e0c079d720f6877565a4170fc7 100644 (file)
--- a/block.c
+++ b/block.c
@@ -668,6 +668,32 @@ int bdrv_create_file(const char *filename, QemuOpts *opts, Error **errp)
     }
 }
 
+int coroutine_fn bdrv_co_delete_file(BlockDriverState *bs, Error **errp)
+{
+    Error *local_err = NULL;
+    int ret;
+
+    assert(bs != NULL);
+
+    if (!bs->drv) {
+        error_setg(errp, "Block node '%s' is not opened", bs->filename);
+        return -ENOMEDIUM;
+    }
+
+    if (!bs->drv->bdrv_co_delete_file) {
+        error_setg(errp, "Driver '%s' does not support image deletion",
+                   bs->drv->format_name);
+        return -ENOTSUP;
+    }
+
+    ret = bs->drv->bdrv_co_delete_file(bs, &local_err);
+    if (ret < 0) {
+        error_propagate(errp, local_err);
+    }
+
+    return ret;
+}
+
 /**
  * Try to get @bs's logical and physical block size.
  * On success, store them in @bsz struct and return 0.
@@ -1872,8 +1898,6 @@ static int bdrv_child_check_perm(BdrvChild *c, BlockReopenQueue *q,
                                  bool *tighten_restrictions, Error **errp);
 static void bdrv_child_abort_perm_update(BdrvChild *c);
 static void bdrv_child_set_perm(BdrvChild *c, uint64_t perm, uint64_t shared);
-static void bdrv_get_cumulative_perm(BlockDriverState *bs, uint64_t *perm,
-                                     uint64_t *shared_perm);
 
 typedef struct BlockReopenQueueEntry {
      bool prepared;
@@ -2097,8 +2121,8 @@ static void bdrv_set_perm(BlockDriverState *bs, uint64_t cumulative_perms,
     }
 }
 
-static void bdrv_get_cumulative_perm(BlockDriverState *bs, uint64_t *perm,
-                                     uint64_t *shared_perm)
+void bdrv_get_cumulative_perm(BlockDriverState *bs, uint64_t *perm,
+                              uint64_t *shared_perm)
 {
     BdrvChild *c;
     uint64_t cumulative_perms = 0;
@@ -4367,6 +4391,7 @@ void bdrv_replace_node(BlockDriverState *from, BlockDriverState *to,
     bdrv_ref(from);
 
     assert(qemu_get_current_aio_context() == qemu_get_aio_context());
+    assert(bdrv_get_aio_context(from) == bdrv_get_aio_context(to));
     bdrv_drained_begin(from);
 
     /* Put all parents into @list and calculate their cumulative permissions */