Commit 7dad9ee6 authored by Kevin Wolf's avatar Kevin Wolf
Browse files

blockdev: Use BlockBackend to resize in qmp_block_resize() 



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: default avatarKevin Wolf <kwolf@redhat.com>
Reviewed-by: default avatarMax Reitz <mreitz@redhat.com>
parent 2c3b44da

blockdev.c

+6 −1
Original line number Diff line number Diff line
@@ -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);

}