219 lines
9.3 KiB
PowerShell
219 lines
9.3 KiB
PowerShell
param(
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[switch]$DirectElevated,
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[string]$ReportPath
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)
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$ErrorActionPreference = 'Stop'
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function Test-Administrator {
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$identity = [Security.Principal.WindowsIdentity]::GetCurrent()
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$principal = [Security.Principal.WindowsPrincipal]::new($identity)
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return $principal.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
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}
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if (-not $DirectElevated) {
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if (Test-Administrator) {
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$DirectElevated = $true
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} else {
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$ReportPath = Join-Path $env:TEMP ("SovereignAI-VHDQuota-{0}.json" -f [guid]::NewGuid().ToString('N'))
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$powershell = Join-Path $env:WINDIR 'System32\WindowsPowerShell\v1.0\powershell.exe'
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$scriptPath = $MyInvocation.MyCommand.Path
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$arguments = @(
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'-NoProfile',
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'-ExecutionPolicy', 'Bypass',
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'-File', ('"{0}"' -f $scriptPath),
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'-DirectElevated',
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'-ReportPath', ('"{0}"' -f $ReportPath)
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) -join ' '
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try {
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$child = Start-Process -FilePath $powershell -ArgumentList $arguments `
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-Verb RunAs -WindowStyle Hidden -PassThru -Wait
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} catch {
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Write-Error "Windows did not grant the required administrator token: $($_.Exception.Message)"
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exit 1
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}
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if (Test-Path -LiteralPath $ReportPath -PathType Leaf) {
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Get-Content -LiteralPath $ReportPath -Raw
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Remove-Item -LiteralPath $ReportPath -Force
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} else {
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Write-Error "The elevated quota probe exited $($child.ExitCode) without producing its report."
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}
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exit $child.ExitCode
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}
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}
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if (-not (Test-Administrator)) {
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throw 'The direct probe requires an elevated administrator token.'
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}
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$probeParent = Join-Path $env:LOCALAPPDATA 'SovereignAI\execution-sandbox-probes'
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$probeDirectory = Join-Path $probeParent ("vhd-quota-{0}" -f [guid]::NewGuid().ToString('N'))
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$vhdPath = Join-Path $probeDirectory 'quota-probe.vhdx'
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$mountPath = Join-Path $probeDirectory 'volume'
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$diskpartScript = Join-Path $probeDirectory 'diskpart.txt'
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$detachScript = Join-Path $probeDirectory 'detach.txt'
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$testFile = Join-Path $mountPath 'capacity-probe.bin'
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$maximumMegabytes = 64
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$report = $null
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$resultCode = 0
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$cleanupError = $null
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$mounted = $false
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try {
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$systemDrive = [System.IO.Path]::GetPathRoot($env:LOCALAPPDATA)
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$availableBytes = [System.IO.DriveInfo]::new($systemDrive).AvailableFreeSpace
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if ($availableBytes -lt 256MB) {
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throw 'Less than 256 MiB is free on the system drive; refusing to create the 64 MiB probe disk.'
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}
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New-Item -ItemType Directory -Path $probeDirectory -Force | Out-Null
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New-Item -ItemType Directory -Path $mountPath -Force | Out-Null
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$diskpartCommands = @(
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"create vdisk file=`"$vhdPath`" maximum=$maximumMegabytes type=expandable",
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"select vdisk file=`"$vhdPath`"",
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'attach vdisk',
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'create partition primary',
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'format fs=ntfs quick label=SOVEREIGNAI_PROBE',
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"assign mount=`"$mountPath`"",
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'exit'
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)
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Set-Content -LiteralPath $diskpartScript -Value $diskpartCommands -Encoding ascii
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$diskpartOutput = & "$env:WINDIR\System32\diskpart.exe" /s $diskpartScript 2>&1 | Out-String
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$diskpartExitCode = $LASTEXITCODE
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if ($diskpartExitCode -ne 0) {
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throw "DiskPart failed with exit code $diskpartExitCode. $diskpartOutput"
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}
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$deadline = (Get-Date).AddSeconds(15)
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$volumes = @(Get-Volume -FileSystemLabel 'SOVEREIGNAI_PROBE' -ErrorAction SilentlyContinue)
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while ($volumes.Count -eq 0 -and (Get-Date) -lt $deadline) {
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Start-Sleep -Milliseconds 250
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$volumes = @(Get-Volume -FileSystemLabel 'SOVEREIGNAI_PROBE' -ErrorAction SilentlyContinue)
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}
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if ($volumes.Count -ne 1) {
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$mountvolOutput = & "$env:WINDIR\System32\mountvol.exe" $mountPath /L 2>&1 | Out-String
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throw "Expected exactly one formatted probe volume. mountvol: $mountvolOutput DiskPart: $diskpartOutput"
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}
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$volume = $volumes[0]
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$mountvolOutput = (& "$env:WINDIR\System32\mountvol.exe" $mountPath /L 2>&1 | Out-String).Trim()
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if ($LASTEXITCODE -ne 0 -or
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-not $mountvolOutput.Trim().Equals($volume.Path.Trim(), [StringComparison]::OrdinalIgnoreCase)) {
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throw "The test mount path does not resolve to the formatted probe VHDX. mountvol='$mountvolOutput'; volume='$($volume.Path)'. DiskPart: $diskpartOutput"
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}
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if ($volume.Size -gt (($maximumMegabytes + 2) * 1MB) -or $volume.Size -lt (48MB)) {
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$mountvolOutput = & "$env:WINDIR\System32\mountvol.exe" $mountPath /L 2>&1 | Out-String
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throw "Unexpected probe volume capacity: $($volume.Size) bytes. mountvol: $mountvolOutput DiskPart: $diskpartOutput"
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}
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$mounted = $true
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$buffer = [byte[]]::new(1MB)
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for ($index = 0; $index -lt $buffer.Length; $index++) {
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$buffer[$index] = [byte](($index * 31 + 97) % 251)
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}
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$writtenBytes = [long]0
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$diskFullException = $null
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$stream = [System.IO.FileStream]::new(
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$testFile,
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[System.IO.FileMode]::CreateNew,
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[System.IO.FileAccess]::Write,
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[System.IO.FileShare]::None,
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$buffer.Length,
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[System.IO.FileOptions]::SequentialScan
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)
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try {
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while ($true) {
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$stream.Write($buffer, 0, $buffer.Length)
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$writtenBytes += $buffer.Length
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}
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} catch [System.IO.IOException] {
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$diskFullException = $_.Exception
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} finally {
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$stream.Dispose()
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}
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$errorCode = if ($diskFullException) { $diskFullException.HResult -band 0xffff } else { $null }
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$volume = Get-Volume -UniqueId $volume.UniqueId
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$freeAtLimit = $volume.SizeRemaining
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if (-not $diskFullException -or $errorCode -ne 112) {
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throw "The write did not stop with ERROR_DISK_FULL (112). HResult=$($diskFullException.HResult); message=$($diskFullException.Message)"
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}
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if ($freeAtLimit -gt 1MB) {
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throw "The write stopped with $freeAtLimit bytes still free; the volume-capacity boundary was not confirmed."
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}
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$vhdBytes = (Get-Item -LiteralPath $vhdPath).Length
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$report = [pscustomobject]@{
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passed = $true
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administrator_token = $true
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diskpart_exit_code = $diskpartExitCode
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volume_label = $volume.FileSystemLabel
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virtual_volume_bytes = $volume.Size
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bytes_written_before_error = $writtenBytes
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error_code = $errorCode
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error_message = $diskFullException.Message
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free_bytes_at_limit = $freeAtLimit
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dynamic_vhdx_bytes_at_limit = $vhdBytes
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probe_vhdx_max_megabytes = $maximumMegabytes
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isolation = 'temporary NTFS filesystem inside a dynamically expanding VHDX with a fixed virtual capacity'
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}
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} catch {
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$resultCode = 1
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$report = [pscustomobject]@{
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passed = $false
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administrator_token = (Test-Administrator)
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error = $_.Exception.Message
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probe_vhdx_max_megabytes = $maximumMegabytes
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}
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} finally {
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try {
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if ($stream) { $stream.Dispose() }
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if (Test-Path -LiteralPath $testFile -PathType Leaf) {
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Remove-Item -LiteralPath $testFile -Force
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}
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if (Test-Path -LiteralPath $vhdPath -PathType Leaf) {
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$mountItem = Get-Item -LiteralPath $mountPath -Force -ErrorAction SilentlyContinue
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if ($mountItem -and ($mountItem.Attributes -band [System.IO.FileAttributes]::ReparsePoint)) {
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& "$env:WINDIR\System32\mountvol.exe" $mountPath /D | Out-Null
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if ($LASTEXITCODE -ne 0) { throw "MountVol could not remove the exact temporary mount point ($LASTEXITCODE)." }
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}
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Set-Content -LiteralPath $detachScript -Value @(
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"select vdisk file=`"$vhdPath`"",
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'detach vdisk',
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'exit'
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) -Encoding ascii
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& "$env:WINDIR\System32\diskpart.exe" /s $detachScript 2>&1 | Out-Null
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if ($LASTEXITCODE -ne 0) { throw "DiskPart could not detach the temporary VHDX ($LASTEXITCODE)." }
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Remove-Item -LiteralPath $vhdPath -Force
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}
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foreach ($file in @($diskpartScript, $detachScript)) {
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if (Test-Path -LiteralPath $file -PathType Leaf) { Remove-Item -LiteralPath $file -Force }
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}
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if (Test-Path -LiteralPath $mountPath -PathType Container) {
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$mountItem = Get-Item -LiteralPath $mountPath -Force
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if (($mountItem.Attributes -band [System.IO.FileAttributes]::ReparsePoint) -eq 0 -and
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-not (Get-ChildItem -LiteralPath $mountPath -Force)) {
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Remove-Item -LiteralPath $mountPath -Force
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}
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}
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if ((Test-Path -LiteralPath $probeDirectory -PathType Container) -and
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-not (Get-ChildItem -LiteralPath $probeDirectory -Force)) {
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Remove-Item -LiteralPath $probeDirectory -Force
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}
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if ((Test-Path -LiteralPath $probeParent -PathType Container) -and
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-not (Get-ChildItem -LiteralPath $probeParent -Force)) {
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Remove-Item -LiteralPath $probeParent -Force
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}
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} catch {
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$cleanupError = $_.Exception.Message
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$resultCode = 1
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}
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if ($cleanupError) { $report | Add-Member -NotePropertyName cleanup_error -NotePropertyValue $cleanupError -Force }
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if ($ReportPath) {
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$report | ConvertTo-Json -Depth 5 | Set-Content -LiteralPath $ReportPath -Encoding utf8
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} else {
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$report | ConvertTo-Json -Depth 5
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}
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}
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exit $resultCode
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