Re: [Qemu-devel] [PATCH] block/file-posix: add bdrv_attach_aio_context callback for host dev and cdrom

[John Snow <jsnow@redhat.com>]

On 07/18/2018 05:12 PM, Nishanth Aravamudan via Qemu-devel wrote:
> In ed6e2161 ("linux-aio: properly bubble up errors from initialzation"),
> I only added a bdrv_attach_aio_context callback for the bdrv_file
> driver. There are several other drivers that use the shared
> aio_plug callback, though, and they will trip the assertion added to
> aio_get_linux_aio because they did not call aio_setup_linux_aio first.
> Add the appropriate callback definition to the affected driver
> definitions.
> 
> Fixes: ed6e2161 ("linux-aio: properly bubble up errors from initialization")
> Reported-by: Farhan Ali <alifm@linux.ibm.com>
> Signed-off-by: Nishanth Aravamudan <naravamudan@digitalocean.com>
> Cc: Eric Blake <eblake@redhat.com>
> Cc: Kevin Wolf <kwolf@redhat.com>
> Cc: John Snow <jsnow@redhat.com>
> Cc: Max Reitz <mreitz@redhat.com>
> Cc: Stefan Hajnoczi <stefanha@redhat.com>
> Cc: Fam Zheng <famz@redhat.com>
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> Cc: qemu-block@nongnu.org
> Cc: qemu-devel@nongnu.org
> ---
>  block/file-posix.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/block/file-posix.c b/block/file-posix.c
> index 60af4b3d51..ad299beb38 100644
> --- a/block/file-posix.c
> +++ b/block/file-posix.c
> @@ -3158,6 +3158,7 @@ static BlockDriver bdrv_host_device = {
>      .bdrv_refresh_limits = raw_refresh_limits,
>      .bdrv_io_plug = raw_aio_plug,
>      .bdrv_io_unplug = raw_aio_unplug,
> +    .bdrv_attach_aio_context = raw_aio_attach_aio_context,
>  
>      .bdrv_co_truncate       = raw_co_truncate,
>      .bdrv_getlength	= raw_getlength,
> @@ -3280,6 +3281,7 @@ static BlockDriver bdrv_host_cdrom = {
>      .bdrv_refresh_limits = raw_refresh_limits,
>      .bdrv_io_plug = raw_aio_plug,
>      .bdrv_io_unplug = raw_aio_unplug,
> +    .bdrv_attach_aio_context = raw_aio_attach_aio_context,
>  
>      .bdrv_co_truncate    = raw_co_truncate,
>      .bdrv_getlength      = raw_getlength,
> @@ -3410,6 +3412,7 @@ static BlockDriver bdrv_host_cdrom = {
>      .bdrv_refresh_limits = raw_refresh_limits,
>      .bdrv_io_plug = raw_aio_plug,
>      .bdrv_io_unplug = raw_aio_unplug,
> +    .bdrv_attach_aio_context = raw_aio_attach_aio_context,
>  
>      .bdrv_co_truncate    = raw_co_truncate,
>      .bdrv_getlength      = raw_getlength,
> 

Seems sane to me, at a glance.

Reviewed-by: John Snow <jsnow@redhat.com>