Olaf Hering 7875efb9f6 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>

2016-11-23 10:47:48 -08:00

..

dataplane

virtio: set ISR on dataplane notifications

2016-11-18 17:29:25 +02:00

block.c

block/qdev: Allow configuring rerror/werror with qdev properties

2016-07-13 13:32:27 +02:00

cdrom.c

block: Clean up includes

2016-01-20 13:36:23 +01:00

ecc.c

block: Clean up includes

2016-01-20 13:36:23 +01:00

fdc.c

fdc: Move qdev properties to FloppyDrive

2016-10-27 16:29:13 -04:00

hd-geometry.c

qemu-common: stop including qemu/bswap.h from qemu-common.h

2016-05-19 16:42:28 +02:00

m25p80.c

block: m25p80: Fix vmstate structure name

2016-09-06 19:52:18 +01:00

Makefile.objs

block: Always compile virtio-blk dataplane

2014-09-22 11:39:51 +01:00

nand.c

nand: Switch to byte-based block access

2016-05-12 15:22:09 +02:00

nvme.c

hw/block/nvme: Simplify if-statements a little bit

2016-10-28 18:17:23 +03:00

nvme.h

util: move declarations out of qemu-common.h

2016-03-22 22:20:17 +01:00

onenand.c

onenand: Switch to byte-based block access

2016-05-12 15:22:09 +02:00

pflash_cfi01.c

pflash: make TYPE_CFI_PFLASH0{1,2} macros public

2016-06-29 14:03:46 +02:00

pflash_cfi02.c

pflash: make TYPE_CFI_PFLASH0{1,2} macros public

2016-06-29 14:03:46 +02:00

tc58128.c

block: Use DIV_ROUND_UP

2016-06-07 18:19:24 +03:00

trace-events

trace-events: fix first line comment in trace-events

2016-08-12 10:36:01 +01:00

virtio-blk.c

virtio-blk: always use dataplane path if ioeventfd is active

2016-10-30 19:51:32 +02:00

xen_blkif.h

Clean up ill-advised or unusual header guards

2016-07-12 16:20:46 +02:00

xen_disk.c

xen_disk: split discard input to match internal representation

2016-11-23 10:47:48 -08:00