From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48353) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ajH5a-0001pO-TZ for qemu-devel@nongnu.org; Thu, 24 Mar 2016 22:03:03 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ajH5a-0005q9-1A for qemu-devel@nongnu.org; Thu, 24 Mar 2016 22:03:02 -0400 Date: Fri, 25 Mar 2016 10:02:55 +0800 From: Fam Zheng Message-ID: <20160325020255.GB29171@ad.usersys.redhat.com> References: <1458858840-3859-1-git-send-email-mreitz@redhat.com> <1458858840-3859-4-git-send-email-mreitz@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1458858840-3859-4-git-send-email-mreitz@redhat.com> Subject: Re: [Qemu-devel] [PATCH v2 3/4] block/null-{co, aio}: Implement get_block_status() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Max Reitz Cc: Kevin Wolf , qemu-devel@nongnu.org, qemu-block@nongnu.org On Thu, 03/24 23:33, Max Reitz wrote: > Signed-off-by: Max Reitz > --- > block/null.c | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) > > diff --git a/block/null.c b/block/null.c > index a7df386..f4b3bba 100644 > --- a/block/null.c > +++ b/block/null.c > @@ -204,6 +204,24 @@ static int null_reopen_prepare(BDRVReopenState *reopen_state, > return 0; > } > > +static int64_t coroutine_fn null_co_get_block_status(BlockDriverState *bs, > + int64_t sector_num, > + int nb_sectors, int *pnum, > + BlockDriverState **file) > +{ > + BDRVNullState *s = bs->opaque; > + off_t start = sector_num * BDRV_SECTOR_SIZE; > + > + *pnum = nb_sectors; > + *file = bs; > + > + if (s->read_zeroes) { > + return BDRV_BLOCK_OFFSET_VALID | start | BDRV_BLOCK_ZERO; > + } else { > + return BDRV_BLOCK_OFFSET_VALID | start; > + } > +} > + > static BlockDriver bdrv_null_co = { > .format_name = "null-co", > .protocol_name = "null-co", > @@ -217,6 +235,8 @@ static BlockDriver bdrv_null_co = { > .bdrv_co_writev = null_co_writev, > .bdrv_co_flush_to_disk = null_co_flush, > .bdrv_reopen_prepare = null_reopen_prepare, > + > + .bdrv_co_get_block_status = null_co_get_block_status, > }; > > static BlockDriver bdrv_null_aio = { > @@ -232,6 +252,8 @@ static BlockDriver bdrv_null_aio = { > .bdrv_aio_writev = null_aio_writev, > .bdrv_aio_flush = null_aio_flush, > .bdrv_reopen_prepare = null_reopen_prepare, > + > + .bdrv_co_get_block_status = null_co_get_block_status, > }; > > static void bdrv_null_init(void) > -- > 2.7.4 > Acked-by: Fam Zheng