Commit c8f6d58e authored by Kevin Wolf's avatar Kevin Wolf
Browse files

block: Assertions for resize permission 



This adds an assertion that ensures that the necessary resize permission
has been granted before bdrv_truncate() is called.

Signed-off-by: default avatarKevin Wolf <kwolf@redhat.com>
Reviewed-by: default avatarMax Reitz <mreitz@redhat.com>
Acked-by: default avatarFam Zheng <famz@redhat.com>
parent afa4b293

block.c

+3 −0
Original line number Diff line number Diff line
@@ -3122,6 +3122,9 @@ int bdrv_truncate(BdrvChild *child, int64_t offset) 
    BlockDriverState *bs = child->bs;

    BlockDriver *drv = bs->drv;

    int ret;



    assert(child->perm & BLK_PERM_RESIZE);



    if (!drv)

        return -ENOMEDIUM;

    if (!drv->bdrv_truncate)

block/io.c

+1 −0
Original line number Diff line number Diff line
@@ -1339,6 +1339,7 @@ static int coroutine_fn bdrv_aligned_pwritev(BdrvChild *child, 
    assert(req->overlap_offset <= offset);

    assert(offset + bytes <= req->overlap_offset + req->overlap_bytes);

    assert(child->perm & BLK_PERM_WRITE);

    assert(end_sector <= bs->total_sectors || child->perm & BLK_PERM_RESIZE);



    ret = notifier_with_return_list_notify(&bs->before_write_notifiers, req);