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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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5
include/hw/block/block.h
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@ -25,6 +25,7 @@ typedef struct BlockConf {
uint32_t discard_granularity;
/* geometry, not all devices use this */
uint32_t cyls, heads, secs;
OnOffAuto wce;
} BlockConf;
static inline unsigned int get_physical_block_exp(BlockConf *conf)
@ -49,7 +50,8 @@ static inline unsigned int get_physical_block_exp(BlockConf *conf)
DEFINE_PROP_UINT16("min_io_size", _state, _conf.min_io_size, 0), \
DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0), \
DEFINE_PROP_UINT32("discard_granularity", _state, \
_conf.discard_granularity, -1)
_conf.discard_granularity, -1), \
DEFINE_PROP_ON_OFF_AUTO("write-cache", _state, _conf.wce, ON_OFF_AUTO_AUTO)
#define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf) \
DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0), \
@ -63,6 +65,7 @@ void blkconf_geometry(BlockConf *conf, int *trans,
unsigned cyls_max, unsigned heads_max, unsigned secs_max,
Error **errp);
void blkconf_blocksizes(BlockConf *conf);
void blkconf_apply_backend_options(BlockConf *conf);
/* Hard disk geometry */