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block/qdev: Allow configuring WCE with qdev properties

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As cache.writeback is a BlockBackend property and as such more related
to the guest device than the BlockDriverState, we already removed it
from the blockdev-add interface. This patch adds the new way to set it,
as a qdev property of the corresponding guest device.

For example: -drive if=none,file=test.img,node-name=img
             -device ide-hd,drive=img,write-cache=off

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Kevin Wolf 2016-06-23 15:12:35 +02:00
parent 8daea51095
commit f6166a06ff
7 changed files with 25 additions and 1 deletions
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16
hw/block/block.c
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@ -51,6 +51,22 @@ void blkconf_blocksizes(BlockConf *conf)
}
}
void blkconf_apply_backend_options(BlockConf *conf)
{
BlockBackend *blk = conf->blk;
bool wce;
switch (conf->wce) {
case ON_OFF_AUTO_ON: wce = true; break;
case ON_OFF_AUTO_OFF: wce = false; break;
case ON_OFF_AUTO_AUTO: wce = blk_enable_write_cache(blk); break;
default:
abort();
}
blk_set_enable_write_cache(blk, wce);
}
void blkconf_geometry(BlockConf *conf, int *ptrans,
unsigned cyls_max, unsigned heads_max, unsigned secs_max,
Error **errp)