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block: consolidate blocksize properties consistency checks

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Several block device properties related to blocksize configuration must
be in certain relationship WRT each other: physical block must be no
smaller than logical block; min_io_size, opt_io_size, and
discard_granularity must be a multiple of a logical block.

To ensure these requirements are met, add corresponding consistency
checks to blkconf_blocksizes, adjusting its signature to communicate
possible error to the caller.  Also remove the now redundant consistency
checks from the specific devices.

Signed-off-by: Roman Kagan <rvkagan@yandex-team.ru>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Paul Durrant <paul@xen.org>
Message-Id: <20200528225516.1676602-3-rvkagan@yandex-team.ru>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Roman Kagan 2020-05-29 01:55:10 +03:00 • committed by Kevin Wolf
parent 6abee26085
commit c56ee92fcb
11 changed files with 57 additions and 26 deletions
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30
hw/block/block.c
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@ -61,7 +61,7 @@ bool blk_check_size_and_read_all(BlockBackend *blk, void *buf, hwaddr size,
return true;
}
void blkconf_blocksizes(BlockConf *conf)
bool blkconf_blocksizes(BlockConf *conf, Error **errp)
{
BlockBackend *blk = conf->blk;
BlockSizes blocksizes;
@ -83,6 +83,34 @@ void blkconf_blocksizes(BlockConf *conf)
conf->logical_block_size = BDRV_SECTOR_SIZE;
}
}
if (conf->logical_block_size > conf->physical_block_size) {
error_setg(errp,
"logical_block_size > physical_block_size not supported");
return false;
}
if (!QEMU_IS_ALIGNED(conf->min_io_size, conf->logical_block_size)) {
error_setg(errp,
"min_io_size must be a multiple of logical_block_size");
return false;
}
if (!QEMU_IS_ALIGNED(conf->opt_io_size, conf->logical_block_size)) {
error_setg(errp,
"opt_io_size must be a multiple of logical_block_size");
return false;
}
if (conf->discard_granularity != -1 &&
!QEMU_IS_ALIGNED(conf->discard_granularity,
conf->logical_block_size)) {
error_setg(errp, "discard_granularity must be "
"a multiple of logical_block_size");
return false;
}
return true;
}
bool blkconf_apply_backend_options(BlockConf *conf, bool readonly,