In order to be able to do permission checking and to keep working with the BdrvChild based bdrv_truncate() that this involves, we need to create a temporary BlockBackend to resize the image.
Signed-off-by: Kevin Wolf <kw...@redhat.com> Reviewed-by: Max Reitz <mre...@redhat.com> --- blockdev.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/blockdev.c b/blockdev.c index bbf9d4d..2b2f6ce 100644 --- a/blockdev.c +++ b/blockdev.c @@ -2858,6 +2858,7 @@ void qmp_block_resize(bool has_device, const char *device, int64_t size, Error **errp) { Error *local_err = NULL; + BlockBackend *blk = NULL; BlockDriverState *bs; AioContext *aio_context; int ret; @@ -2888,10 +2889,13 @@ void qmp_block_resize(bool has_device, const char *device, goto out; } + blk = blk_new(); + blk_insert_bs(blk, bs); + /* complete all in-flight operations before resizing the device */ bdrv_drain_all(); - ret = bdrv_truncate(bs, size); + ret = blk_truncate(blk, size); switch (ret) { case 0: break; @@ -2913,6 +2917,7 @@ void qmp_block_resize(bool has_device, const char *device, } out: + blk_unref(blk); aio_context_release(aio_context); } -- 1.8.3.1