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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dataplane	xen-block: scale sector based quantities correctly	2019-04-04 18:00:07 +01:00
block.c
cdrom.c
ecc.c
fdc.c
hd-geometry.c
Kconfig
m25p80.c
Makefile.objs
nand.c
nvme.c
nvme.h
onenand.c
pflash_cfi01.c	pflash: Bury disabled code to limit device sizes	2019-03-26 08:16:24 +01:00
pflash_cfi02.c	pflash: Bury disabled code to limit device sizes	2019-03-26 08:16:24 +01:00
tc58128.c
trace-events
vhost-user-blk.c
virtio-blk.c
xen_blkif.h	xen-block: scale sector based quantities correctly	2019-04-04 18:00:07 +01:00
xen-block.c	xen-block: scale sector based quantities correctly	2019-04-04 18:00:07 +01:00