diff options
| author | Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> | 2020-12-16 09:16:55 +0300 |
|---|---|---|
| committer | Max Reitz <mreitz@redhat.com> | 2021-01-26 11:26:54 +0100 |
| commit | e4c8fddde79d45b061d29e69bb564ea73d027a7a (patch) | |
| tree | 37edc2592fdaf273e857a4d7e65c9c90cf24e531 /qapi | |
| parent | 880747a887a3c2ee022b7f610e54e08b84deb1af (diff) | |
qapi: copy-on-read filter: add 'bottom' option
Add an option to limit copy-on-read operations to specified sub-chain
of backing-chain, to make copy-on-read filter useful for block-stream
job.
Suggested-by: Max Reitz <mreitz@redhat.com>
Suggested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
[vsementsov: change subject, modified to freeze the chain,
do some fixes]
Message-Id: <20201216061703.70908-6-vsementsov@virtuozzo.com>
Signed-off-by: Max Reitz <mreitz@redhat.com>
Diffstat (limited to 'qapi')
| -rw-r--r-- | qapi/block-core.json | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json index b55732d802..65167ebf56 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -3959,6 +3959,24 @@ 'data': { 'throttle-group': 'str', 'file' : 'BlockdevRef' } } + +## +# @BlockdevOptionsCor: +# +# Driver specific block device options for the copy-on-read driver. +# +# @bottom: The name of a non-filter node (allocation-bearing layer) that +# limits the COR operations in the backing chain (inclusive), so +# that no data below this node will be copied by this filter. +# If option is absent, the limit is not applied, so that data +# from all backing layers may be copied. +# +# Since: 6.0 +## +{ 'struct': 'BlockdevOptionsCor', + 'base': 'BlockdevOptionsGenericFormat', + 'data': { '*bottom': 'str' } } + ## # @BlockdevOptions: # @@ -4011,7 +4029,7 @@ 'bochs': 'BlockdevOptionsGenericFormat', 'cloop': 'BlockdevOptionsGenericFormat', 'compress': 'BlockdevOptionsGenericFormat', - 'copy-on-read':'BlockdevOptionsGenericFormat', + 'copy-on-read':'BlockdevOptionsCor', 'dmg': 'BlockdevOptionsGenericFormat', 'file': 'BlockdevOptionsFile', 'ftp': 'BlockdevOptionsCurlFtp', |