diff options
| author | Kevin Wolf <kwolf@redhat.com> | 2017-01-24 13:58:00 +0100 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2017-02-28 20:40:36 +0100 |
| commit | dabd18f64c8800d441fd9fb232c2102e8409aa2e (patch) | |
| tree | 96cd8be59b9a5f045edca263974b08d26f169884 /include/hw/block | |
| parent | a17c17a274f24f0c0259f89d288f29b8ce0511aa (diff) | |
hw/block: Introduce share-rw qdev property
By default, don't allow another writer for block devices that are
attached to a guest device. For the cases where this setup is intended
(e.g. using a cluster filesystem on the disk), the new option can be
used to allow it.
This change affects only devices using DEFINE_BLOCK_PROPERTIES().
Devices directly using DEFINE_PROP_DRIVE() still accept writers
unconditionally.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Acked-by: Fam Zheng <famz@redhat.com>
Diffstat (limited to 'include/hw/block')
| -rw-r--r-- | include/hw/block/block.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/hw/block/block.h b/include/hw/block/block.h index 5d462eb6e4..f3f6e8ef02 100644 --- a/include/hw/block/block.h +++ b/include/hw/block/block.h @@ -26,6 +26,7 @@ typedef struct BlockConf { /* geometry, not all devices use this */ uint32_t cyls, heads, secs; OnOffAuto wce; + bool share_rw; BlockdevOnError rerror; BlockdevOnError werror; } BlockConf; @@ -53,7 +54,9 @@ static inline unsigned int get_physical_block_exp(BlockConf *conf) DEFINE_PROP_UINT32("opt_io_size", _state, _conf.opt_io_size, 0), \ DEFINE_PROP_UINT32("discard_granularity", _state, \ _conf.discard_granularity, -1), \ - DEFINE_PROP_ON_OFF_AUTO("write-cache", _state, _conf.wce, ON_OFF_AUTO_AUTO) + DEFINE_PROP_ON_OFF_AUTO("write-cache", _state, _conf.wce, \ + ON_OFF_AUTO_AUTO), \ + DEFINE_PROP_BOOL("share-rw", _state, _conf.share_rw, false) #define DEFINE_BLOCK_CHS_PROPERTIES(_state, _conf) \ DEFINE_PROP_UINT32("cyls", _state, _conf.cyls, 0), \ |