From: Jason Dillaman <jdillama@redhat.com>
To: Peter Lieven <pl@kamp.de>
Cc: Kevin Wolf <kwolf@redhat.com>,
Christian Theune <ct@flyingcircus.io>,
qemu-devel <qemu-devel@nongnu.org>,
qemu-block <qemu-block@nongnu.org>, Max Reitz <mreitz@redhat.com>
Subject: Re: [PATCH 3/7] block/rbd: use stored image_size in qemu_rbd_getlength
Date: Thu, 14 Jan 2021 14:18:51 -0500 [thread overview]
Message-ID: <CA+aFP1DnYJjbt99Je841E_ZZi-7nKY89FF1apHF=y4bZ7fuEUw@mail.gmail.com> (raw)
In-Reply-To: <20201227164236.10143-4-pl@kamp.de>
On Sun, Dec 27, 2020 at 11:42 AM Peter Lieven <pl@kamp.de> wrote:
>
> Signed-off-by: Peter Lieven <pl@kamp.de>
> ---
> block/rbd.c | 10 +---------
> 1 file changed, 1 insertion(+), 9 deletions(-)
>
> diff --git a/block/rbd.c b/block/rbd.c
> index bc8cf8af9b..a2da70e37f 100644
> --- a/block/rbd.c
> +++ b/block/rbd.c
> @@ -956,15 +956,7 @@ static int qemu_rbd_getinfo(BlockDriverState *bs, BlockDriverInfo *bdi)
> static int64_t qemu_rbd_getlength(BlockDriverState *bs)
> {
> BDRVRBDState *s = bs->opaque;
> - rbd_image_info_t info;
> - int r;
> -
> - r = rbd_stat(s->image, &info, sizeof(info));
> - if (r < 0) {
> - return r;
> - }
> -
> - return info.size;
> + return s->image_size;
> }
>
> static int coroutine_fn qemu_rbd_co_truncate(BlockDriverState *bs,
> --
> 2.17.1
An RBD image can technically change size dynamically while in-use. The
original code would provide the most up-to-date length but this
version will always return the size of the image when it was opened.
--
Jason
next prev parent reply other threads:[~2021-01-14 19:28 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-27 16:42 [PATCH 0/7] block/rbd: migrate to coroutines and add write zeroes support Peter Lieven
2020-12-27 16:42 ` [PATCH 1/7] block/rbd: bump librbd requirement to luminous release Peter Lieven
2020-12-27 16:42 ` [PATCH 2/7] block/rbd: store object_size in BDRVRBDState Peter Lieven
2020-12-27 16:42 ` [PATCH 3/7] block/rbd: use stored image_size in qemu_rbd_getlength Peter Lieven
2021-01-14 19:18 ` Jason Dillaman [this message]
2021-01-14 19:32 ` Peter Lieven
2020-12-27 16:42 ` [PATCH 4/7] block/rbd: add bdrv_{attach,detach}_aio_context Peter Lieven
2021-01-14 19:18 ` Jason Dillaman
2021-01-14 19:49 ` Peter Lieven
2020-12-27 16:42 ` [PATCH 5/7] block/rbd: migrate from aio to coroutines Peter Lieven
2021-01-14 19:19 ` Jason Dillaman
2021-01-14 19:39 ` Peter Lieven
2020-12-27 16:42 ` [PATCH 6/7] block/rbd: add write zeroes support Peter Lieven
2021-01-14 19:19 ` Jason Dillaman
2021-01-14 19:41 ` Peter Lieven
2021-01-15 15:09 ` Jason Dillaman
2020-12-27 16:42 ` [PATCH 7/7] block/rbd: change request alignment to 1 byte Peter Lieven
2021-01-14 19:19 ` Jason Dillaman
2021-01-14 19:59 ` Peter Lieven
2021-01-15 15:27 ` Jason Dillaman
2021-01-15 15:39 ` Peter Lieven
2021-01-18 22:33 ` Jason Dillaman
2021-01-19 9:36 ` Peter Lieven
2021-01-19 14:20 ` Jason Dillaman
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