Re: [RFC PATCH v1 0/8] qapi: add generator for Golang interface

[Markus Armbruster]

Victor Toso <victortoso@redhat.com> writes:

> Hi,
>
> On Mon, May 02, 2022 at 10:01:41AM -0400, Andrea Bolognani wrote:
>> On Mon, May 02, 2022 at 01:46:23PM +0200, Markus Armbruster wrote:
>> > Andrea Bolognani <abologna@redhat.com> writes:
>> > >> > The wire protocol would still retain the unappealing
>> > >> > name, but at least client libraries could hide the
>> > >> > uglyness from users.
>> > >>
>> > >> At the price of mild inconsistency between the library
>> > >> interface and QMP.
>> > >
>> > > That's fine, and in fact it already happens all the time
>> > > when QAPI names (log-append) are translated to C
>> > > identifiers (log_append).
>> >
>> > There's a difference between trivial translations like
>> > "replace '-' by '_'" and arbitrary replacement like the one
>> > for enumeration constants involving 'prefix'.
>> 
>> Fair enough.
>> 
>> I still feel that 1) users of a language SDK will ideally not
>> need to look at the QAPI schema or wire chatter too often and
>
> That should be the preference, yes.
>
>> 2) even when that ends up being necessary, figuring out that
>> LogAppend and logappend are the same thing is not going to be
>> an unreasonable hurdle, especially when the status quo would be
>> to work with Logappend instead.
>
> If user really needs to leave their ecosystem in order to check
> an alias, I hope we are already considering this a corner case.
> Still, if we are thinking about multiple languages communicating
> with QEMU, it is reasonable to consider the necessity of some
> docs page where they can easily grep/search for the types, alias,
> examples, etc.  IMHO, this should be a long term goal and not a
> blocker... I can volunteer on working on that later.
>
>> > > The point is that, if we want to provide a language
>> > > interface that feels natural, we need a way to mark parts
>> > > of a QAPI symbol's name in a way that makes it possible for
>> > > the generator to know they're acronyms and treat them in an
>> > > appropriate, language-specific manner.
>> >
>> > It's not just acronyms.  Consider IAmALittleTeapot.  If you
>> > can assume that only beginning of words are capitalized, even
>> > for acronyms, you can split this into words without trouble.
>> > You can't recover correct case, though: "i am a little
>> > teapot" is wrong.
>> 
>> Is there any scenario in which we would care though? We're in
>> the business of translating identifiers from one machine
>> representation to another, so once it has been split up
>> correctly into the words that compose it (which in your example
>> above it has) then we don't really care about anything else
>> unless acronyms are involved.
>> 
>> In other words, we can obtain the list of words "i am a little
>> teapot" programmatically both from IAmALittleTeapot and
>> i-am-a-little-teapot, and in both cases we can then generate
>> IAmALittleTeapot or I_AM_A_LITTLE_TEAPOT or
>> i_am_a_little_teapot or whatever is appropriate for the context
>> and target language, but the fact that in a proper English
>> sentence "I" would have to be capitalized doesn't really enter
>> the picture.
>> 
>> > "Split before capital letter" falls apart when you have
>> > characters that cannot be capitalized: Point3d.
>> >
>> > Camel case is hopeless.
>> 
>> I would argue that it works quite well for most scenarios, but
>> there are some corner cases where it's clearly not good enough.
>> If we can define a way to clue in the generator about "Point3d"
>> having to be interpreted as "point 3d" and "VNCProps" as "vnc
>> props", then we are golden. That wouldn't be necessary for
>> simple cases that are already handled correctly.
>> 
>> A more radical idea would be to start using dash-notation for
>> types too. That'd remove the word splitting issue altogether,
>> at the cost of the schema being (possibly) harder to read and
>> more distanced from the generated code.
>> 
>> You'd still only be able to generate VncProps from vnc-props
>> though.
>> 
>> > > The obvious way to implement this would be with an
>> > > annotation along the lines of the one I proposed. Other
>> > > ideas?
>> >
>> > I'm afraid having the schema spell out names in multiple
>> > naming conventions could be onerous.  How many names will
>> > need it?
>> 
>> I don't have hard data on this. I could try extracting it, but
>> that might end up being a bigger job than I had anticipated.
>
> The only way to know is by checking /o\
> I'll give it a shot.

I append a quick hack to find names in a QAPI schema, and sort them into
buckets "lc" (lower-with-hyphen), "uc" (UPPER_WITH_UNDERSCORE), "cc"
(CamelCase where words are obvious), and "mc" (everything else, mostly
CamelCase where words aren't obvious).

Note that this ignores naming rule violations such as upper case enum
member EAX.

>> My guess is that the number of cases where the naive algorithm
>> can't split words correctly is relatively small compared to the
>> size of the entire QAPI schema. Fair warning: I have made
>> incorrect guesses in the past ;)
>> 
>> > Times how many naming conventions?
>> 
>> Yeah, I don't think requiring all possible permutations to be
>> spelled out in the schema is the way to go. That's exactly why
>> my proposal was to offer a way to inject the semantic
>> information that the parser can't figure out itself.
>> 
>> Once you have a way to inform the generator that "VNCProps" is
>> made of the two words "vnc" and "props", and that "vnc" is an
>> acronym, then it can generate an identifier appropriate for the
>> target language without having to spell out anywhere that such
>> an identifier would be VNCProps for Go and VncProps for Rust.
>> 
>> By the way, while looking around I realized that we also have
>> to take into account things like D-Bus: the QAPI type
>> ChardevDBus, for example, would probably translate verbatim to
>> Go but have to be changed to ChardevDbus for Rust. Fun :)
>> 
>> Revised proposal for the annotation:
>> 
>>   ns:word-WORD-WoRD-123Word
>
> I really like it.
>
>> Words are always separated by dashes; "regular" words are
>> entirely lowercase, while the presence of even a single
>> uppercase letter in a word denotes the fact that its case
>> should be preserved when the naming conventions of the target
>> language allow that.
>> 
>> > Another issue: the fancier the translation from schema name
>> > to language-specific name gets, the harder it becomes to find
>> > one from the other.
>> 
>> That's true, but at least to me the trade-off feels reasonable.
>
> I don't quite get the argument why it gets harder to find. We can
> simply provide the actual name as reference in the generated
> documentation, no?

Predictable name transformation can save me detours through
documentation.  Being able to guess the Go bindings just from the QMP
Reference Manual can be nice: it lets me write Go code with just the QMP
Reference manual in view.  Being able to guess the name in the QAPI
schema from the name in the Go bindings can also be nice: it lets me
look it up in the QMP Reference manual without jumping through the
bindings documentation.

Or do you envisage a Go bindings manual that fully replaces the QMP
Reference Manual for developers writing Go?

> As Kevin already pointed out that he is not planning to work on
> the Alias (reference below), any other idea besides the Andrea's
> annotation suggestion? While this is not a blocker, I agree it
> would be nice to be consistent.
>
>     https://lists.gnu.org/archive/html/qemu-devel/2021-09/msg04703.html

Let's first try to get a handle on how many schema names are
problematic.


$ git-diff
diff --git a/scripts/qapi/expr.py b/scripts/qapi/expr.py
index 5a1782b57e..804b8ab455 100644
--- a/scripts/qapi/expr.py
+++ b/scripts/qapi/expr.py
@@ -94,6 +94,7 @@ def check_name_str(name: str, info: QAPISourceInfo, source: 
str) -> str:
     """
     # Reserve the entire 'q_' namespace for c_name(), and for 'q_empty'
     # and 'q_obj_*' implicit type names.
+    print("###", name)
     match = valid_name.match(name)
     if not match or c_name(name, False).startswith('q_'):
         raise QAPISemError(info, "%s has an invalid name" % source)
$ cd bld
$ python3 ../scripts/qapi-gen.py -o qapi -b ../qapi/qapi-schema.json | sort -u 
| awk '/^### [a-z0-9-]+$/ { print "lc", $2; next } /^### [A-Z0-9_]+$/ { print 
"uc", $2; next } /^### ([A-Z][a-z]+)+/ { print "cc", $2; next } { print "mc", 
$2 }' | sort
cc Abort
cc AbortWrapper
cc AcpiTableOptions
cc ActionCompletionMode
cc AddfdInfo
cc AnnounceParameters
cc AudioFormat
cc Audiodev
cc AudiodevAlsaOptions
cc AudiodevAlsaPerDirectionOptions
cc AudiodevCoreaudioOptions
cc AudiodevCoreaudioPerDirectionOptions
cc AudiodevDriver
cc AudiodevDsoundOptions
cc AudiodevGenericOptions
cc AudiodevJackOptions
cc AudiodevJackPerDirectionOptions
cc AudiodevOssOptions
cc AudiodevOssPerDirectionOptions
cc AudiodevPaOptions
cc AudiodevPaPerDirectionOptions
cc AudiodevPerDirectionOptions
cc AudiodevSdlOptions
cc AudiodevSdlPerDirectionOptions
cc AudiodevWavOptions
cc AuthZListFileProperties
cc AuthZListProperties
cc AuthZPAMProperties
cc AuthZSimpleProperties
cc BackupCommon
cc BackupPerf
cc BalloonInfo
cc BiosAtaTranslation
cc BitmapMigrationBitmapAlias
cc BitmapMigrationBitmapAliasTransform
cc BitmapMigrationNodeAlias
cc BitmapSyncMode
cc BlkdebugEvent
cc BlkdebugIOType
cc BlkdebugInjectErrorOptions
cc BlkdebugSetStateOptions
cc BlockDeviceInfo
cc BlockDeviceIoStatus
cc BlockDeviceStats
cc BlockDeviceTimedStats
cc BlockDirtyBitmap
cc BlockDirtyBitmapAdd
cc BlockDirtyBitmapAddWrapper
cc BlockDirtyBitmapMerge
cc BlockDirtyBitmapMergeWrapper
cc BlockDirtyBitmapOrStr
cc BlockDirtyBitmapSha256
cc BlockDirtyBitmapWrapper
cc BlockDirtyInfo
cc BlockErrorAction
cc BlockExportInfo
cc BlockExportOptions
cc BlockExportOptionsFuse
cc BlockExportOptionsNbd
cc BlockExportOptionsNbdBase
cc BlockExportOptionsVhostUserBlk
cc BlockExportRemoveMode
cc BlockExportType
cc BlockIOThrottle
cc BlockInfo
cc BlockJobInfo
cc BlockLatencyHistogramInfo
cc BlockMeasureInfo
cc BlockPermission
cc BlockStats
cc BlockStatsSpecific
cc BlockStatsSpecificFile
cc BlockStatsSpecificNvme
cc BlockdevAioOptions
cc BlockdevAmendOptions
cc BlockdevAmendOptionsLUKS
cc BlockdevAmendOptionsQcow2
cc BlockdevBackup
cc BlockdevBackupWrapper
cc BlockdevCacheInfo
cc BlockdevCacheOptions
cc BlockdevChangeReadOnlyMode
cc BlockdevCreateOptions
cc BlockdevCreateOptionsFile
cc BlockdevCreateOptionsGluster
cc BlockdevCreateOptionsLUKS
cc BlockdevCreateOptionsNfs
cc BlockdevCreateOptionsParallels
cc BlockdevCreateOptionsQcow
cc BlockdevCreateOptionsQcow2
cc BlockdevCreateOptionsQed
cc BlockdevCreateOptionsRbd
cc BlockdevCreateOptionsSsh
cc BlockdevCreateOptionsVdi
cc BlockdevCreateOptionsVhdx
cc BlockdevCreateOptionsVmdk
cc BlockdevCreateOptionsVpc
cc BlockdevDetectZeroesOptions
cc BlockdevDiscardOptions
cc BlockdevDriver
cc BlockdevOnError
cc BlockdevOptions
cc BlockdevOptionsBlkdebug
cc BlockdevOptionsBlklogwrites
cc BlockdevOptionsBlkreplay
cc BlockdevOptionsBlkverify
cc BlockdevOptionsCbw
cc BlockdevOptionsCor
cc BlockdevOptionsCurlBase
cc BlockdevOptionsCurlFtp
cc BlockdevOptionsCurlFtps
cc BlockdevOptionsCurlHttp
cc BlockdevOptionsCurlHttps
cc BlockdevOptionsFile
cc BlockdevOptionsGenericCOWFormat
cc BlockdevOptionsGenericFormat
cc BlockdevOptionsGluster
cc BlockdevOptionsIscsi
cc BlockdevOptionsLUKS
cc BlockdevOptionsNVMe
cc BlockdevOptionsNbd
cc BlockdevOptionsNfs
cc BlockdevOptionsNull
cc BlockdevOptionsPreallocate
cc BlockdevOptionsQcow
cc BlockdevOptionsQcow2
cc BlockdevOptionsQuorum
cc BlockdevOptionsRaw
cc BlockdevOptionsRbd
cc BlockdevOptionsReplication
cc BlockdevOptionsSsh
cc BlockdevOptionsThrottle
cc BlockdevOptionsVVFAT
cc BlockdevQcow2Encryption
cc BlockdevQcow2EncryptionFormat
cc BlockdevQcow2Version
cc BlockdevQcowEncryption
cc BlockdevQcowEncryptionFormat
cc BlockdevRef
cc BlockdevRefOrNull
cc BlockdevSnapshot
cc BlockdevSnapshotInternal
cc BlockdevSnapshotInternalWrapper
cc BlockdevSnapshotSync
cc BlockdevSnapshotSyncWrapper
cc BlockdevSnapshotWrapper
cc BlockdevVhdxSubformat
cc BlockdevVmdkAdapterType
cc BlockdevVmdkSubformat
cc BlockdevVpcSubformat
cc CanHostSocketcanProperties
cc ChardevBackend
cc ChardevBackendInfo
cc ChardevBackendKind
cc ChardevCommon
cc ChardevCommonWrapper
cc ChardevDBus
cc ChardevDBusWrapper
cc ChardevFile
cc ChardevFileWrapper
cc ChardevHostdev
cc ChardevHostdevWrapper
cc ChardevInfo
cc ChardevMux
cc ChardevMuxWrapper
cc ChardevQemuVDAgent
cc ChardevQemuVDAgentWrapper
cc ChardevReturn
cc ChardevRingbuf
cc ChardevRingbufWrapper
cc ChardevSocket
cc ChardevSocketWrapper
cc ChardevSpiceChannel
cc ChardevSpiceChannelWrapper
cc ChardevSpicePort
cc ChardevSpicePortWrapper
cc ChardevStdio
cc ChardevStdioWrapper
cc ChardevUdp
cc ChardevUdpWrapper
cc ChardevVC
cc ChardevVCWrapper
cc ColoCompareProperties
cc CommandInfo
cc CommandLineOptionInfo
cc CommandLineParameterInfo
cc CommandLineParameterType
cc CommandNotFound
cc CompatPolicy
cc CompatPolicyInput
cc CompatPolicyOutput
cc CompressionStats
cc CpuDefinitionInfo
cc CpuInfoFast
cc CpuInfoS390
cc CpuInstanceProperties
cc CpuModelBaselineInfo
cc CpuModelCompareInfo
cc CpuModelCompareResult
cc CpuModelExpansionInfo
cc CpuModelExpansionType
cc CpuModelInfo
cc CpuS390State
cc CryptodevBackendProperties
cc CryptodevVhostUserProperties
cc CurrentMachineParams
cc DataFormat
cc DeviceNotActive
cc DeviceNotFound
cc DirtyRateInfo
cc DirtyRateMeasureMode
cc DirtyRateStatus
cc DirtyRateVcpu
cc DisplayCocoa
cc DisplayCurses
cc DisplayDBus
cc DisplayEGLHeadless
cc DisplayGLMode
cc DisplayGTK
cc DisplayOptions
cc DisplayProtocol
cc DisplayReloadOptions
cc DisplayReloadOptionsVNC
cc DisplayReloadType
cc DisplayType
cc DisplayUpdateOptions
cc DisplayUpdateOptionsVNC
cc DisplayUpdateType
cc DriveBackup
cc DriveBackupWrapper
cc DriveMirror
cc DummyForceArrays
cc DumpGuestMemoryCapability
cc DumpGuestMemoryFormat
cc DumpQueryResult
cc DumpStatus
cc EventLoopBaseProperties
cc ExpirePasswordOptions
cc ExpirePasswordOptionsVnc
cc FailoverStatus
cc FdsetFdInfo
cc FdsetInfo
cc FilterBufferProperties
cc FilterDumpProperties
cc FilterMirrorProperties
cc FilterRedirectorProperties
cc FilterRewriterProperties
cc FloppyDriveType
cc FuseExportAllowOther
cc GenericError
cc GrabToggleKeys
cc GuestPanicAction
cc GuestPanicInformation
cc GuestPanicInformationHyperV
cc GuestPanicInformationS390
cc GuestPanicInformationType
cc GuidInfo
cc HmatCacheAssociativity
cc HmatCacheWritePolicy
cc HmatLBDataType
cc HmatLBMemoryHierarchy
cc HostMemPolicy
cc HotpluggableCPU
cc HumanReadableText
cc ImageCheck
cc ImageFormat
cc ImageInfo
cc ImageInfoSpecific
cc ImageInfoSpecificKind
cc ImageInfoSpecificLUKSWrapper
cc ImageInfoSpecificQCow2
cc ImageInfoSpecificQCow2Encryption
cc ImageInfoSpecificQCow2EncryptionBase
cc ImageInfoSpecificQCow2Wrapper
cc ImageInfoSpecificRbd
cc ImageInfoSpecificRbdWrapper
cc ImageInfoSpecificVmdk
cc ImageInfoSpecificVmdkWrapper
cc InetSocketAddress
cc InetSocketAddressBase
cc InetSocketAddressWrapper
cc InputAxis
cc InputBarrierProperties
cc InputBtnEvent
cc InputBtnEventWrapper
cc InputButton
cc InputEvent
cc InputEventKind
cc InputKeyEvent
cc InputKeyEventWrapper
cc InputLinuxProperties
cc InputMoveEvent
cc InputMoveEventWrapper
cc IntWrapper
cc IoOperationType
cc IothreadProperties
cc IscsiHeaderDigest
cc IscsiTransport
cc JobInfo
cc JobStatus
cc JobType
cc JobVerb
cc KeyValue
cc KeyValueKind
cc KvmInfo
cc LostTickPolicy
cc MachineInfo
cc MainLoopProperties
cc MapEntry
cc Memdev
cc MemoryBackendEpcProperties
cc MemoryBackendFileProperties
cc MemoryBackendMemfdProperties
cc MemoryBackendProperties
cc MemoryDeviceInfo
cc MemoryDeviceInfoKind
cc MemoryFailureAction
cc MemoryFailureFlags
cc MemoryFailureRecipient
cc MemoryInfo
cc MigrateSetParameters
cc MigrationCapability
cc MigrationCapabilityStatus
cc MigrationInfo
cc MigrationParameter
cc MigrationParameters
cc MigrationStats
cc MigrationStatus
cc MirrorCopyMode
cc MirrorSyncMode
cc MonitorMode
cc MonitorOptions
cc MouseInfo
cc MultiFDCompression
cc NameInfo
cc NbdServerAddOptions
cc NbdServerOptions
cc NetClientDriver
cc NetFilterDirection
cc NetLegacyNicOptions
cc Netdev
cc NetdevBridgeOptions
cc NetdevHubPortOptions
cc NetdevL2TPv3Options
cc NetdevNetmapOptions
cc NetdevSocketOptions
cc NetdevTapOptions
cc NetdevUserOptions
cc NetdevVdeOptions
cc NetdevVhostUserOptions
cc NetdevVhostVDPAOptions
cc NetfilterInsert
cc NetfilterProperties
cc NetworkAddressFamily
cc NewImageMode
cc NumaCpuOptions
cc NumaDistOptions
cc NumaHmatCacheOptions
cc NumaHmatLBOptions
cc NumaNodeOptions
cc NumaOptions
cc NumaOptionsType
cc ObjectOptions
cc ObjectPropertyInfo
cc ObjectType
cc ObjectTypeInfo
cc OffAutoPCIBAR
cc OnOffAuto
cc OnOffSplit
cc PanicAction
cc PciBridgeInfo
cc PciBusInfo
cc PciDeviceClass
cc PciDeviceId
cc PciDeviceInfo
cc PciInfo
cc PciMemoryRange
cc PciMemoryRegion
cc PrManagerHelperProperties
cc PreallocMode
cc QapiErrorClass
cc Qcow2BitmapInfo
cc Qcow2BitmapInfoFlags
cc Qcow2CompressionType
cc Qcow2OverlapCheckFlags
cc Qcow2OverlapCheckMode
cc Qcow2OverlapChecks
cc QtestProperties
cc QuorumOpType
cc QuorumReadPattern
cc RbdAuthMode
cc RbdEncryptionCreateOptions
cc RbdEncryptionCreateOptionsLUKS
cc RbdEncryptionCreateOptionsLUKS2
cc RbdEncryptionCreateOptionsLUKSBase
cc RbdEncryptionOptions
cc RbdEncryptionOptionsLUKS
cc RbdEncryptionOptionsLUKS2
cc RbdEncryptionOptionsLUKSBase
cc RbdImageEncryptionFormat
cc RebootAction
cc RemoteObjectProperties
cc ReplayInfo
cc ReplayMode
cc ReplicationMode
cc ReplicationStatus
cc RngEgdProperties
cc RngProperties
cc RngRandomProperties
cc RockerOfDpaFlow
cc RockerOfDpaFlowAction
cc RockerOfDpaFlowKey
cc RockerOfDpaFlowMask
cc RockerOfDpaGroup
cc RockerPort
cc RockerPortAutoneg
cc RockerPortDuplex
cc RockerSwitch
cc RunState
cc RxFilterInfo
cc RxState
cc SchemaInfo
cc SchemaInfoAlternate
cc SchemaInfoAlternateMember
cc SchemaInfoArray
cc SchemaInfoBuiltin
cc SchemaInfoCommand
cc SchemaInfoEnum
cc SchemaInfoEnumMember
cc SchemaInfoEvent
cc SchemaInfoObject
cc SchemaInfoObjectMember
cc SchemaInfoObjectVariant
cc SchemaMetaType
cc SecretCommonProperties
cc SecretKeyringProperties
cc SecretProperties
cc SetPasswordAction
cc SetPasswordOptions
cc SetPasswordOptionsVnc
cc SevAttestationReport
cc SevCapability
cc SevGuestProperties
cc SevInfo
cc SevLaunchMeasureInfo
cc SevState
cc SgxEPC
cc SgxEPCDeviceInfo
cc SgxEPCDeviceInfoWrapper
cc SgxEPCProperties
cc ShutdownAction
cc ShutdownCause
cc SmbiosEntryPointType
cc SnapshotInfo
cc SocketAddress
cc SocketAddressLegacy
cc SocketAddressType
cc SpiceBasicInfo
cc SpiceChannel
cc SpiceInfo
cc SpiceQueryMouseMode
cc SpiceServerInfo
cc SshHostKeyCheck
cc SshHostKeyCheckHashType
cc SshHostKeyCheckMode
cc SshHostKeyHash
cc StatusInfo
cc StrOrNull
cc String
cc StringWrapper
cc SysEmuTarget
cc TargetInfo
cc ThrottleGroupProperties
cc ThrottleLimits
cc TlsCredsAnonProperties
cc TlsCredsProperties
cc TlsCredsPskProperties
cc TlsCredsX509Properties
cc TpmModel
cc TpmType
cc TpmTypeOptions
cc TraceEventInfo
cc TraceEventState
cc TransactionAction
cc TransactionActionKind
cc TransactionProperties
cc UnixSocketAddress
cc UnixSocketAddressWrapper
cc UuidInfo
cc VersionInfo
cc VersionTriple
cc VfioStats
cc VirtioMEMDeviceInfo
cc VirtioMEMDeviceInfoWrapper
cc VirtioPMEMDeviceInfo
cc VirtioPMEMDeviceInfoWrapper
cc VncBasicInfo
cc VncClientInfo
cc VncInfo
cc VncInfo2
cc VncPrimaryAuth
cc VncServerInfo
cc VncServerInfo2
cc VncVencryptSubAuth
cc VsockSocketAddress
cc VsockSocketAddressWrapper
cc WatchdogAction
cc YankInstance
cc YankInstanceBlockNode
cc YankInstanceChardev
cc YankInstanceType
lc a
lc aarch64
lc abort
lc aborting
lc abs
lc absolute
lc absolute-paths
lc abstract
lc accept
lc access-bandwidth
lc access-latency
lc action
lc action-required
lc actions
lc active
lc active-l1
lc active-l2
lc actual
lc actual-size
lc adapter-type
lc add-fd
lc addr
lc address
lc addresses
lc aes
lc aes-128
lc aes-192
lc aes-256
lc again
lc aio
lc aio-max-batch
lc alias
lc alias-of
lc align
lc aligned-accesses
lc all
lc allocated-clusters
lc allocation-depth
lc allow
lc allow-oob
lc allow-other
lc allow-write-only-overlay
lc alpha
lc alsa
lc alt
lc alt-alt
lc alternate
lc always
lc amend
lc amount-exceeded
lc announce-initial
lc announce-max
lc announce-rounds
lc announce-self
lc announce-step
lc api-major
lc api-minor
lc apostrophe
lc append
lc arch
lc arg-type
lc arg1
lc arg2
lc arg3
lc arg4
lc arg5
lc arm
lc array
lc associativity
lc asterisk
lc audiodev
lc audiomute
lc audionext
lc audioplay
lc audioprev
lc audiostop
lc auth
lc auth-client-required
lc authz-list
lc authz-listfile
lc authz-pam
lc authz-simple
lc auto
lc auto-converge
lc auto-dismiss
lc auto-finalize
lc auto-read-only
lc autoneg
lc avr
lc axis
lc b
lc backend
lc background
lc background-snapshot
lc backing
lc backing-file
lc backing-filename
lc backing-filename-format
lc backing-fmt
lc backing-image
lc backslash
lc backspace
lc backup
lc balloon
lc bandwidth
lc bar
lc bar0
lc bar1
lc bar2
lc bar3
lc bar4
lc bar5
lc base
lc base-memory
lc base-node
lc base64
lc before
lc begin
lc behind
lc bind
lc bins
lc bitmap
lc bitmap-directory
lc bitmap-mode
lc bitmaps
lc blk
lc blkdebug
lc blklogwrites
lc blkreplay
lc blkverify
lc block
lc block-backend
lc block-bitmap-mapping
lc block-commit
lc block-dirty-bitmap-add
lc block-dirty-bitmap-clear
lc block-dirty-bitmap-disable
lc block-dirty-bitmap-enable
lc block-dirty-bitmap-merge
lc block-dirty-bitmap-remove
lc block-driver
lc block-export-add
lc block-export-del
lc block-incremental
lc block-job
lc block-job-cancel
lc block-job-complete
lc block-job-dismiss
lc block-job-finalize
lc block-job-pause
lc block-job-resume
lc block-job-set-speed
lc block-latency-histogram-set
lc block-node
lc block-set-write-threshold
lc block-size
lc block-state-zero
lc block-status
lc block-stream
lc blockdev-add
lc blockdev-backup
lc blockdev-change-medium
lc blockdev-close-tray
lc blockdev-create
lc blockdev-del
lc blockdev-insert-medium
lc blockdev-mirror
lc blockdev-open-tray
lc blockdev-remove-medium
lc blockdev-reopen
lc blockdev-snapshot
lc blockdev-snapshot-delete-internal-sync
lc blockdev-snapshot-internal-sync
lc blockdev-snapshot-sync
lc blocked-reasons
lc bochs
lc boolean
lc bootfile
lc bottom
lc boundaries
lc boundaries-flush
lc boundaries-read
lc boundaries-write
lc bps
lc bps-read
lc bps-read-max
lc bps-read-max-length
lc bps-total
lc bps-total-max
lc bps-total-max-length
lc bps-write
lc bps-write-max
lc bps-write-max-length
lc br
lc braille
lc bridge
lc broadcast-allowed
lc btn
lc buf-size
lc buffer-count
lc buffer-length
lc build-id
lc builtin
lc bus
lc buslogic
lc busy
lc busy-rate
lc button
lc bytes
lc c
lc cache
lc cache-clean-interval
lc cache-miss
lc cache-miss-rate
lc cache-size
lc cached
lc calc-dirty-rate
lc calc-time
lc calculator
lc can-bus
lc can-host-socketcan
lc canbus
lc cancel
lc cancel-path
lc cancelled
lc cancelling
lc capabilities
lc capability
lc case
lc cast5-128
lc cbc
lc cbitpos
lc cephx
lc cert-chain
lc cert-subject
lc change-backing-file
lc change-vnc-password
lc channel-id
lc channel-type
lc channels
lc chardev
lc chardev-add
lc chardev-change
lc chardev-remove
lc chardev-send-break
lc charset
lc check-errors
lc check-stop
lc checkpoint-ready
lc checkpoint-reply
lc checkpoint-request
lc child
lc children
lc cid
lc cipher-alg
lc cipher-mode
lc class
lc client
lc client-name
lc clients
lc clipboard
lc cloop
lc closefd
lc cluster-id
lc cluster-size
lc clusters
lc cocoa
lc colo
lc colo-compare
lc cols
lc comma
lc command
lc command-line
lc commit
lc compat
lc compiled-version
lc complete
lc completed
lc completion-errors
lc completion-mode
lc complex
lc compose
lc compress
lc compress-level
lc compress-threads
lc compress-wait-thread
lc compressed
lc compressed-clusters
lc compressed-size
lc compression
lc compression-rate
lc compression-type
lc computer
lc concluded
lc conf
lc config
lc connect
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lc query-hotpluggable-cpus
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lc query-memdev
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mc ACPIOSTInfo
mc ACPISlotType
mc COLOExitReason
mc COLOMessage
mc COLOMode
mc COLOStatus
mc DBusVMStateProperties
mc GICCapability
mc IOThreadInfo
mc JSONType
mc KVMMissingCap
mc NFSServer
mc NFSTransport
mc PCDIMMDeviceInfo
mc PCDIMMDeviceInfoWrapper
mc PCIELinkSpeed
mc PCIELinkWidth
mc PRManagerInfo
mc QAuthZListFormat
mc QAuthZListPolicy
mc QAuthZListRule
mc QCryptoBlockAmendOptions
mc QCryptoBlockAmendOptionsLUKS
mc QCryptoBlockCreateOptions
mc QCryptoBlockCreateOptionsLUKS
mc QCryptoBlockFormat
mc QCryptoBlockInfo
mc QCryptoBlockInfoBase
mc QCryptoBlockInfoLUKS
mc QCryptoBlockInfoLUKSSlot
mc QCryptoBlockLUKSKeyslotState
mc QCryptoBlockOpenOptions
mc QCryptoBlockOptionsBase
mc QCryptoBlockOptionsLUKS
mc QCryptoBlockOptionsQCow
mc QCryptoCipherAlgorithm
mc QCryptoCipherMode
mc QCryptoHashAlgorithm
mc QCryptoIVGenAlgorithm
mc QCryptoSecretFormat
mc QCryptoTLSCredsEndpoint
mc QKeyCode
mc QKeyCodeWrapper
mc QMPCapability
mc S390CrashReason
mc SGXEPCSection
mc SGXInfo
mc SMPConfiguration
mc TPMEmulatorOptions
mc TPMEmulatorOptionsWrapper
mc TPMInfo
mc TPMPassthroughOptions
mc TPMPassthroughOptionsWrapper
mc X86CPUFeatureWordInfo
mc X86CPURegister32
mc XBZRLECacheStats
mc XDbgBlockGraph
mc XDbgBlockGraphEdge
mc XDbgBlockGraphNode
mc XDbgBlockGraphNodeType
mc ac_back
mc ac_bookmarks
mc ac_forward
mc ac_home
mc ac_refresh
mc account_failed
mc account_invalid
mc add_client
mc alt_r
mc asl_compiler_id
mc asl_compiler_rev
mc avg_flush_latency_ns
mc avg_rd_latency_ns
mc avg_rd_queue_depth
mc avg_wr_latency_ns
mc avg_wr_queue_depth
mc backing_file
mc backing_file_depth
mc block_resize
mc block_set_io_throttle
mc bps_max
mc bps_max_length
mc bps_rd
mc bps_rd_max
mc bps_rd_max_length
mc bps_wr
mc bps_wr_max
mc bps_wr_max_length
mc bracket_left
mc bracket_right
mc caps_lock
mc class_info
mc client_migrate_info
mc cluster_alloc
mc cluster_alloc_bytes
mc cluster_alloc_space
mc cluster_free
mc compare_timeout
mc cor_write
mc cow_read
mc cow_write
mc ctrl_r
mc d2_5
mc detect_zeroes
mc device_add
mc device_del
mc empty_image_prepare
mc expire_password
mc expired_scan_cycle
mc failed_flush_operations
mc failed_rd_operations
mc failed_unmap_operations
mc failed_wr_operations
mc flush_latency_histogram
mc flush_operations
mc flush_to_disk
mc flush_to_os
mc flush_total_time_ns
mc grab_all
mc grave_accent
mc host_cdrom
mc host_device
mc idle_time_ns
mc interval_length
mc invalid_flush_operations
mc invalid_rd_operations
mc invalid_unmap_operations
mc invalid_wr_operations
mc io_range
mc io_uring
mc iops_max
mc iops_max_length
mc iops_rd
mc iops_rd_max
mc iops_rd_max_length
mc iops_size
mc iops_wr
mc iops_wr_max
mc iops_wr_max_length
mc irq_pin
mc known_hosts
mc kp_0
mc kp_1
mc kp_2
mc kp_3
mc kp_4
mc kp_5
mc kp_6
mc kp_7
mc kp_8
mc kp_9
mc kp_add
mc kp_comma
mc kp_decimal
mc kp_divide
mc kp_enter
mc kp_equals
mc kp_multiply
mc kp_subtract
mc l1_grow_activate_table
mc l1_grow_alloc_table
mc l1_grow_write_table
mc l1_shrink_free_l2_clusters
mc l1_shrink_write_table
mc l1_update
mc l2_alloc_cow_read
mc l2_alloc_write
mc l2_load
mc l2_update
mc l2_update_compressed
mc legacyESX
mc max_flush_latency_ns
mc max_queue_size
mc max_rd_latency_ns
mc max_wr_latency_ns
mc mem_type_64
mc memory_range
mc meta_l
mc meta_r
mc migrate_cancel
mc min_flush_latency_ns
mc min_rd_latency_ns
mc min_wr_latency_ns
mc monolithicFlat
mc monolithicSparse
mc netdev_add
mc netdev_del
mc new_state
mc notify_dev
mc num_lock
mc oem_id
mc oem_rev
mc oem_table_id
mc pci_bridge
mc prefetchable_range
mc primary_in
mc pwritev_done
mc pwritev_rmw_after_head
mc pwritev_rmw_after_tail
mc pwritev_rmw_head
mc pwritev_rmw_tail
mc pwritev_zero
mc qdev_id
mc qmp_capabilities
mc rd_bytes
mc rd_latency_histogram
mc rd_merged
mc rd_operations
mc rd_total_time_ns
mc read_aio
mc read_backing_aio
mc read_compressed
mc refblock_alloc
mc refblock_alloc_hookup
mc refblock_alloc_switch_table
mc refblock_alloc_write
mc refblock_alloc_write_blocks
mc refblock_alloc_write_table
mc refblock_load
mc refblock_update
mc refblock_update_part
mc reftable_grow
mc reftable_load
mc reftable_update
mc sasl_username
mc scroll_lock
mc secondary_in
mc secret_keyring
mc set_link
mc set_password
mc shift_r
mc streamOptimized
mc system_powerdown
mc system_reset
mc system_wakeup
mc timed_stats
mc tray_open
mc twoGbMaxExtentFlat
mc twoGbMaxExtentSparse
mc unmap_bytes
mc unmap_merged
mc unmap_operations
mc unmap_total_time_ns
mc vmstate_load
mc vmstate_save
mc vnet_hdr
mc vnet_hdr_support
mc wr_bytes
mc wr_highest_offset
mc wr_latency_histogram
mc wr_merged
mc wr_operations
mc wr_total_time_ns
mc write_aio
mc write_compressed
mc write_threshold
mc x509_dname
mc x86_64
uc ACPI_DEVICE_OST
uc BALLOON_CHANGE
uc BLOCK_EXPORT_DELETED
uc BLOCK_IMAGE_CORRUPTED
uc BLOCK_IO_ERROR
uc BLOCK_JOB_CANCELLED
uc BLOCK_JOB_COMPLETED
uc BLOCK_JOB_ERROR
uc BLOCK_JOB_PENDING
uc BLOCK_JOB_READY
uc BLOCK_WRITE_THRESHOLD
uc COLO_EXIT
uc CPU
uc DEVICE_DELETED
uc DEVICE_TRAY_MOVED
uc DEVICE_UNPLUG_GUEST_ERROR
uc DIMM
uc DUMP_COMPLETED
uc EAX
uc EBP
uc EBX
uc ECX
uc EDI
uc EDX
uc ESI
uc ESP
uc FAILOVER_NEGOTIATED
uc GUEST_CRASHLOADED
uc GUEST_PANICKED
uc JOB_STATUS_CHANGE
uc MEMORY_DEVICE_SIZE_CHANGE
uc MEMORY_FAILURE
uc MEM_UNPLUG_ERROR
uc MIGRATION
uc MIGRATION_PASS
uc NIC_RX_FILTER_CHANGED
uc POWERDOWN
uc PR_MANAGER_STATUS_CHANGED
uc QUORUM_FAILURE
uc QUORUM_REPORT_BAD
uc RDMA_GID_STATUS_CHANGED
uc RESET
uc RESUME
uc RTC_CHANGE
uc SHUTDOWN
uc SPICE_CONNECTED
uc SPICE_DISCONNECTED
uc SPICE_INITIALIZED
uc SPICE_MIGRATE_COMPLETED
uc STOP
uc SUSPEND
uc SUSPEND_DISK
uc UNPLUG_PRIMARY
uc UUID
uc VNC_CONNECTED
uc VNC_DISCONNECTED
uc VNC_INITIALIZED
uc VSERPORT_CHANGE
uc WAKEUP
uc WATCHDOG