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qapi/block-core: Add "new" qcow2 options

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qcow2 supports more than four options by now, add the new options
(overlap check mode and metadata cache size)

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 1408557576-14574-5-git-send-email-mreitz@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Max Reitz 2014-08-20 19:59:36 +02:00 committed by Stefan Hajnoczi
parent ee42b5ce0b
commit f658581130
1 changed files with 78 additions and 1 deletions
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79
qapi/block-core.json
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@ -1263,6 +1263,67 @@
'base': 'BlockdevOptionsGenericFormat',
'data': { '*backing': 'BlockdevRef' } }
##
# @Qcow2OverlapCheckMode
#
# General overlap check modes.
#
# @none: Do not perform any checks
#
# @constant: Perform only checks which can be done in constant time and
# without reading anything from disk
#
# @cached: Perform only checks which can be done without reading anything
# from disk
#
# @all: Perform all available overlap checks
#
# Since: 2.2
##
{ 'enum': 'Qcow2OverlapCheckMode',
'data': [ 'none', 'constant', 'cached', 'all' ] }
##
# @Qcow2OverlapCheckFlags
#
# Structure of flags for each metadata structure. Setting a field to 'true'
# makes qemu guard that structure against unintended overwriting. The default
# value is chosen according to the template given.
#
# @template: Specifies a template mode which can be adjusted using the other
# flags, defaults to 'cached'
#
# Since: 2.2
##
{ 'type': 'Qcow2OverlapCheckFlags',
'data': { '*template': 'Qcow2OverlapCheckMode',
'*main-header': 'bool',
'*active-l1': 'bool',
'*active-l2': 'bool',
'*refcount-table': 'bool',
'*refcount-block': 'bool',
'*snapshot-table': 'bool',
'*inactive-l1': 'bool',
'*inactive-l2': 'bool' } }
##
# @Qcow2OverlapChecks
#
# Specifies which metadata structures should be guarded against unintended
# overwriting.
#
# @flags: set of flags for separate specification of each metadata structure
# type
#
# @mode: named mode which chooses a specific set of flags
#
# Since: 2.2
##
{ 'union': 'Qcow2OverlapChecks',
'discriminator': {},
'data': { 'flags': 'Qcow2OverlapCheckFlags',
'mode': 'Qcow2OverlapCheckMode' } }
##
# @BlockdevOptionsQcow2
#
@ -1282,6 +1343,18 @@
# should be issued on other occasions where a cluster
# gets freed
#
# @overlap-check: #optional which overlap checks to perform for writes
# to the image, defaults to 'cached' (since 2.2)
#
# @cache-size: #optional the maximum total size of the L2 table and
# refcount block caches in bytes (since 2.2)
#
# @l2-cache-size: #optional the maximum size of the L2 table cache in
# bytes (since 2.2)
#
# @refcount-cache-size: #optional the maximum size of the refcount block cache
# in bytes (since 2.2)
#
# Since: 1.7
##
{ 'type': 'BlockdevOptionsQcow2',
@ -1289,7 +1362,11 @@
'data': { '*lazy-refcounts': 'bool',
'*pass-discard-request': 'bool',
'*pass-discard-snapshot': 'bool',
'*pass-discard-other': 'bool' } }
'*pass-discard-other': 'bool',
'*overlap-check': 'Qcow2OverlapChecks',
'*cache-size': 'int',
'*l2-cache-size': 'int',
'*refcount-cache-size': 'int' } }
##