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authorMiroslav Rezanina <mrezanin@redhat.com>2013-02-13 09:09:39 +0100
committerKevin Wolf <kwolf@redhat.com>2013-02-22 21:21:09 +0100
commitb35b2bba5b372ff912c5fe7e5ad6c5a9d883464f (patch)
treeac58562db2b76e3a134fe82fac0430b090bb3701 /block.c
parent7d81c1413c9c9bdcc966453636e4ca7776b59861 (diff)
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block: Add synchronous wrapper for bdrv_co_is_allocated_above
There's no synchronous wrapper for bdrv_co_is_allocated_above function so it's not possible to check for sector allocation in an image with a backing file. Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'block.c')
-rw-r--r--block.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/block.c b/block.c
index 50dab8e..08039d2 100644
--- a/block.c
+++ b/block.c
@@ -2681,6 +2681,7 @@ int bdrv_has_zero_init(BlockDriverState *bs)
typedef struct BdrvCoIsAllocatedData {
BlockDriverState *bs;
+ BlockDriverState *base;
int64_t sector_num;
int nb_sectors;
int *pnum;
@@ -2813,6 +2814,44 @@ int coroutine_fn bdrv_co_is_allocated_above(BlockDriverState *top,
return 0;
}
+/* Coroutine wrapper for bdrv_is_allocated_above() */
+static void coroutine_fn bdrv_is_allocated_above_co_entry(void *opaque)
+{
+ BdrvCoIsAllocatedData *data = opaque;
+ BlockDriverState *top = data->bs;
+ BlockDriverState *base = data->base;
+
+ data->ret = bdrv_co_is_allocated_above(top, base, data->sector_num,
+ data->nb_sectors, data->pnum);
+ data->done = true;
+}
+
+/*
+ * Synchronous wrapper around bdrv_co_is_allocated_above().
+ *
+ * See bdrv_co_is_allocated_above() for details.
+ */
+int bdrv_is_allocated_above(BlockDriverState *top, BlockDriverState *base,
+ int64_t sector_num, int nb_sectors, int *pnum)
+{
+ Coroutine *co;
+ BdrvCoIsAllocatedData data = {
+ .bs = top,
+ .base = base,
+ .sector_num = sector_num,
+ .nb_sectors = nb_sectors,
+ .pnum = pnum,
+ .done = false,
+ };
+
+ co = qemu_coroutine_create(bdrv_is_allocated_above_co_entry);
+ qemu_coroutine_enter(co, &data);
+ while (!data.done) {
+ qemu_aio_wait();
+ }
+ return data.ret;
+}
+
BlockInfo *bdrv_query_info(BlockDriverState *bs)
{
BlockInfo *info = g_malloc0(sizeof(*info));