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From: "Philippe Mathieu-Daudé" <philmd@redhat.com>
To: Eric Blake <eblake@redhat.com>, qemu-devel@nongnu.org
Cc: kwolf@redhat.com, Liu Yuan <namei.unix@gmail.com>,
	"open list:Sheepdog" <sheepdog@lists.wpkg.org>,
	qemu-block@nongnu.org, mreitz@redhat.com
Subject: Re: [PATCH-for-5.0 v2 4/4] sheepdog: Consistently set bdrv_has_zero_init_truncate
Date: Wed, 25 Mar 2020 15:45:23 +0100
Message-ID: <7c58b0c7-171c-d359-6f8d-c2efaa4af16e@redhat.com> (raw)
In-Reply-To: <20200324174233.1622067-5-eblake@redhat.com>

On 3/24/20 6:42 PM, Eric Blake wrote:
> block_int.h claims that .bdrv_has_zero_init must return 0 if
> .bdrv_has_zero_init_truncate does likewise; but this is violated if
> only the former callback is provided if .bdrv_co_truncate also exists.
> When adding the latter callback, it was mistakenly added to only one
> of the three possible sheepdog instantiations.
> 
> Fixes: 1dcaf527
> Signed-off-by: Eric Blake <eblake@redhat.com>
> ---
>   block/sheepdog.c | 2 ++
>   1 file changed, 2 insertions(+)
> 
> diff --git a/block/sheepdog.c b/block/sheepdog.c
> index cfa84338a2d6..522c16a93676 100644
> --- a/block/sheepdog.c
> +++ b/block/sheepdog.c
> @@ -3269,6 +3269,7 @@ static BlockDriver bdrv_sheepdog_tcp = {
>       .bdrv_co_create               = sd_co_create,
>       .bdrv_co_create_opts          = sd_co_create_opts,
>       .bdrv_has_zero_init           = bdrv_has_zero_init_1,
> +    .bdrv_has_zero_init_truncate  = bdrv_has_zero_init_1,
>       .bdrv_getlength               = sd_getlength,
>       .bdrv_get_allocated_file_size = sd_get_allocated_file_size,
>       .bdrv_co_truncate             = sd_co_truncate,
> @@ -3307,6 +3308,7 @@ static BlockDriver bdrv_sheepdog_unix = {
>       .bdrv_co_create               = sd_co_create,
>       .bdrv_co_create_opts          = sd_co_create_opts,
>       .bdrv_has_zero_init           = bdrv_has_zero_init_1,
> +    .bdrv_has_zero_init_truncate  = bdrv_has_zero_init_1,
>       .bdrv_getlength               = sd_getlength,
>       .bdrv_get_allocated_file_size = sd_get_allocated_file_size,
>       .bdrv_co_truncate             = sd_co_truncate,
> 

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>



  parent reply index

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-24 17:42 [PATCH for-5.0 v2 0/4] bug fixes extracted from larger qcow2 zero bit work Eric Blake
2020-03-24 17:42 ` [PATCH v2 1/4] qcow2: Comment typo fixes Eric Blake
2020-03-24 17:42 ` [PATCH v2 2/4] qcow2: List autoclear bit names in header Eric Blake
2020-03-24 17:42 ` [PATCH v2 3/4] qcow2: Avoid feature name extension on small cluster size Eric Blake
2020-03-25 12:42   ` Max Reitz
2020-03-25 13:18     ` Eric Blake
2020-03-25 13:52       ` Max Reitz
2020-03-25 14:01         ` Eric Blake
2020-03-24 17:42 ` [PATCH v2 4/4] sheepdog: Consistently set bdrv_has_zero_init_truncate Eric Blake
2020-03-24 19:33   ` John Snow
2020-03-25 14:45   ` Philippe Mathieu-Daudé [this message]
2020-03-26 13:32 ` [PATCH for-5.0 v2 0/4] bug fixes extracted from larger qcow2 zero bit work Max Reitz

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