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| author | Manos Pitsidianakis <el13635@mail.ntua.gr> | 2017-08-25 16:20:27 +0300 |
|---|---|---|
| committer | Kevin Wolf <kwolf@redhat.com> | 2017-09-06 10:12:02 +0200 |
| commit | d8e7d87ec49c1458f516d50d109b3f201da736a1 (patch) | |
| tree | 79513899899eac436824afc1108b64953acc0cc7 /qapi/block-core.json | |
| parent | 432d889e55e2614bd0e8bb559af18a61ac217565 (diff) | |
| download | qemu-d8e7d87ec49c1458f516d50d109b3f201da736a1.tar.gz | |
block: add throttle block filter driver
block/throttle.c uses existing I/O throttle infrastructure inside a
block filter driver. I/O operations are intercepted in the filter's
read/write coroutines, and referred to block/throttle-groups.c
The driver can be used with the syntax
-drive driver=throttle,file.filename=foo.qcow2,throttle-group=bar
which registers the throttle filter node with the ThrottleGroup 'bar'. The
given group must be created beforehand with object-add or -object.
Reviewed-by: Alberto Garcia <berto@igalia.com>
Signed-off-by: Manos Pitsidianakis <el13635@mail.ntua.gr>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qapi/block-core.json')
| -rw-r--r-- | qapi/block-core.json | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json index 60bd7ec379..bb11815608 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -2223,6 +2223,7 @@ # Drivers that are supported in block device operations. # # @vxhs: Since 2.10 +# @throttle: Since 2.11 # # Since: 2.9 ## @@ -2232,7 +2233,7 @@ 'host_device', 'http', 'https', 'iscsi', 'luks', 'nbd', 'nfs', 'null-aio', 'null-co', 'parallels', 'qcow', 'qcow2', 'qed', 'quorum', 'raw', 'rbd', 'replication', 'sheepdog', 'ssh', - 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat', 'vxhs' ] } + 'throttle', 'vdi', 'vhdx', 'vmdk', 'vpc', 'vvfat', 'vxhs' ] } ## # @BlockdevOptionsFile: @@ -3096,6 +3097,20 @@ '*tls-creds': 'str' } } ## +# @BlockdevOptionsThrottle: +# +# Driver specific block device options for the throttle driver +# +# @throttle-group: the name of the throttle-group object to use. It +# must already exist. +# @file: reference to or definition of the data source block device +# Since: 2.11 +## +{ 'struct': 'BlockdevOptionsThrottle', + 'data': { 'throttle-group': 'str', + 'file' : 'BlockdevRef' + } } +## # @BlockdevOptions: # # Options for creating a block device. Many options are available for all @@ -3156,6 +3171,7 @@ 'replication':'BlockdevOptionsReplication', 'sheepdog': 'BlockdevOptionsSheepdog', 'ssh': 'BlockdevOptionsSsh', + 'throttle': 'BlockdevOptionsThrottle', 'vdi': 'BlockdevOptionsGenericFormat', 'vhdx': 'BlockdevOptionsGenericFormat', 'vmdk': 'BlockdevOptionsGenericCOWFormat', |