Paul Durrant 2bcd05cf24 xen-block: scale sector based quantities correctly ... The Xen blkif protocol requires that sector based quantities should be interpreted strictly as multiples of 512 bytes. Specifically: "first_sect and last_sect in blkif_request_segment, as well as sector_number in blkif_request, are always expressed in 512-byte units." Commit fcab2b464e "xen: add header and build dataplane/xen-block.c" incorrectly modified behaviour to use the block device logical_block_size property as the scale, instead of correctly shifting values by the hardcoded BDRV_SECTOR_BITS (and hence scaling them to 512 byte units). This patch undoes that change and restores compliance with the spec. Furthermore, this patch also restores the original xen_disk behaviour of advertizing a hardcoded 'sector-size' value of 512 in xenstore and scaling 'sectors' accordingly. The realize() method is also modified to fail if logical_block_size is set to anything other than 512. Signed-off-by: Paul Durrant <paul.durrant@citrix.com> Reviewed-by: Anthony PERARD <anthony.perard@citrix.com> Message-Id: <20190401121719.27208-1-paul.durrant@citrix.com> Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>		2019-04-04 18:00:07 +01:00
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Makefile.objs	block: fix recursion in hw/block/dataplane	2019-03-07 21:45:53 +01:00
trace-events	trace-events: Shorten file names in comments	2019-03-22 16:18:07 +00:00
virtio-blk.c
virtio-blk.h
xen-block.c	xen-block: scale sector based quantities correctly	2019-04-04 18:00:07 +01:00
xen-block.h