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Re: [Xen-devel] [PATCH] xen-block: support feature-large-sector-size
- To: Paul Durrant <paul.durrant@xxxxxxxxxx>, qemu-devel@xxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, qemu-block@xxxxxxxxxx
- From: Max Reitz <mreitz@xxxxxxxxxx>
- Date: Wed, 26 Jun 2019 18:48:50 +0200
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- Cc: Anthony Perard <anthony.perard@xxxxxxxxxx>, Kevin Wolf <kwolf@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Stefan Hajnoczi <stefanha@xxxxxxxxxx>
- Delivery-date: Wed, 26 Jun 2019 16:49:13 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 09.04.19 18:40, Paul Durrant wrote:
> A recent Xen commit [1] clarified the semantics of sector based quantities
> used in the blkif protocol such that it is now safe to create a xen-block
> device with a logical_block_size != 512, as long as the device only
> connects to a frontend advertizing 'feature-large-block-size'.
>
> This patch modifies xen-block accordingly. It also uses a stack variable
> for the BlockBackend in xen_block_realize() to avoid repeated dereferencing
> of the BlockConf pointer, and changes the parameters of
> xen_block_dataplane_create() so that the BlockBackend pointer and sector
> size are passed expicitly rather than implicitly via the BlockConf.
>
> These modifications have been tested against a recent Windows PV XENVBD
> driver [2] using a xen-disk device with a 4kB logical block size.
>
> [1]
> http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=67e1c050e36b2c9900cca83618e56189effbad98
> [2] https://winpvdrvbuild.xenproject.org:8080/job/XENVBD-master/126
>
> Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
> ---
> Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> Cc: Anthony Perard <anthony.perard@xxxxxxxxxx>
> Cc: Stefan Hajnoczi <stefanha@xxxxxxxxxx>
> Cc: Kevin Wolf <kwolf@xxxxxxxxxx>
> Cc: Max Reitz <mreitz@xxxxxxxxxx>
> ---
> hw/block/dataplane/xen-block.c | 25 ++++++++++++----------
> hw/block/dataplane/xen-block.h | 3 ++-
> hw/block/xen-block.c | 38 +++++++++++++++++++++-------------
> 3 files changed, 40 insertions(+), 26 deletions(-)
Thanks, added “by frontend” to the error message and applied to my block
branch:
https://git.xanclic.moe/XanClic/qemu/commits/branch/block
Max
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