block: Drop unused .bdrv_has_zero_init_truncate

Now that there are no clients of bdrv_has_zero_init_truncate, none of
the drivers need to worry about providing it.

What's more, this eliminates a source of some confusion: a literal
reading of the documentation as written in ceaca56f and implemented in
commit 1dcaf527 claims that a driver which returns 0 for
bdrv_has_zero_init_truncate() must not return 1 for
bdrv_has_zero_init(); this condition was violated for parallels, qcow,
and sometimes for vdi, although in practice it did not matter since
those drivers also lacked .bdrv_co_truncate.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20200428202905.770727-10-eblake@redhat.com>
Acked-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Eric Blake 2020-04-28 15:29:05 -05:00 committed by Kevin Wolf
parent dbc636e791
commit 47e0b38a13
12 changed files with 0 additions and 45 deletions

View file

@ -414,11 +414,6 @@ static int raw_has_zero_init(BlockDriverState *bs)
return bdrv_has_zero_init(bs->file->bs);
}
static int raw_has_zero_init_truncate(BlockDriverState *bs)
{
return bdrv_has_zero_init_truncate(bs->file->bs);
}
static int coroutine_fn raw_co_create_opts(BlockDriver *drv,
const char *filename,
QemuOpts *opts,
@ -582,7 +577,6 @@ BlockDriver bdrv_raw = {
.bdrv_co_ioctl = &raw_co_ioctl,
.create_opts = &raw_create_opts,
.bdrv_has_zero_init = &raw_has_zero_init,
.bdrv_has_zero_init_truncate = &raw_has_zero_init_truncate,
.strong_runtime_opts = raw_strong_runtime_opts,
.mutable_opts = mutable_opts,
};