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| author | Olaf Hering <olaf@aepfle.de> | 2016-11-23 10:39:12 +0000 |
|---|---|---|
| committer | Stefano Stabellini <sstabellini@kernel.org> | 2016-11-23 10:47:48 -0800 |
| commit | 7875efb9f641ed0e79320bf258ee69cd0bf03716 (patch) | |
| tree | 37ca801d5af3eb4eaf68f9d3988f89e59d86e00e /hw/core/loader.c | |
| parent | 00227fefd2059464cd2f59aed29944874c630e2f (diff) | |
| download | focaccia-qemu-7875efb9f641ed0e79320bf258ee69cd0bf03716.tar.gz focaccia-qemu-7875efb9f641ed0e79320bf258ee69cd0bf03716.zip | |
xen_disk: split discard input to match internal representation
The guest sends discard requests as u64 sector/count pairs, but the
block layer operates internally with s64/s32 pairs. The conversion
leads to IO errors in the guest, the discard request is not processed.
domU.cfg:
'vdev=xvda, format=qcow2, backendtype=qdisk, target=/x.qcow2'
domU:
mkfs.ext4 -F /dev/xvda
Discarding device blocks: failed - Input/output error
Fix this by splitting the request into chunks of BDRV_REQUEST_MAX_SECTORS.
Add input range checking to avoid overflow.
Fixes f313520 ("xen_disk: add discard support")
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Diffstat (limited to 'hw/core/loader.c')
0 files changed, 0 insertions, 0 deletions