diff options
author | Miroslav Rezanina <mrezanin@redhat.com> | 2013-02-13 09:09:39 +0100 |
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committer | Kevin Wolf <kwolf@redhat.com> | 2013-02-22 21:21:09 +0100 |
commit | b35b2bba5b372ff912c5fe7e5ad6c5a9d883464f (patch) | |
tree | ac58562db2b76e3a134fe82fac0430b090bb3701 /block.c | |
parent | 7d81c1413c9c9bdcc966453636e4ca7776b59861 (diff) | |
download | hqemu-b35b2bba5b372ff912c5fe7e5ad6c5a9d883464f.zip hqemu-b35b2bba5b372ff912c5fe7e5ad6c5a9d883464f.tar.gz |
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.c | 39 |
1 files changed, 39 insertions, 0 deletions
@@ -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)); |