Version 3: blocking vsock server, vmctl shell, GhostHTTP package - #228
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groundwater wants to merge 22 commits into
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Version 3: blocking vsock server, vmctl shell, GhostHTTP package#228groundwater wants to merge 22 commits into
groundwater wants to merge 22 commits into
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Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Deployment target: macOS 15 → 26 (project.yml, Package.swift, Makefile vtool) - Swift tools version 6.2 with strict concurrency fixes (nonisolated(unsafe) singletons, @sendable callbacks, async shutdown) - Drop KqueueVsockProbe (kqueue works with AF_VSOCK on macOS 26) - Add make debug-dmg: debug config, timestamp versioned, notarized - Sign debug dylibs in Contents/MacOS/ for notarization - cli target honors APP_SKIP_XCODE_SIGNING - Update IPSW catalog to macOS 26.4.1 (25E253) Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
NIOVsockServer (port 5000): - HTTP/1.1 + HTTP/2 auto-detection via ProtocolDetector - StreamDispatcher routes requests synchronously (no async race) - StreamingFileReceiveHandler writes uploads directly to disk - RouterBridgeHandler bridges NIO HTTP to existing Router - allowRemoteHalfClosure for vsock connections - HTTP/2 responses omit forbidden connection header - os_log tracing throughout the pipeline HealthServer (port 5002): - Writes version JSON on connect, stays open for liveness EventPushServer (port 5003): - Tracks single client channel, pushEvent() writes NDJSON via NIO TunnelServer (port 5001): - CONNECT handshake via TunnelHandshakeHandler - Bidirectional TCP bridge via paired GlueHandler instances Shared types (VsockTypes.swift): - AF_VSOCK, sockaddr_vm, VsockServerError extracted from old VsockServer Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Guest (GhostTools): - ShellWebSocketHandler spawns PTY via forkpty, bridges I/O over WebSocket binary frames, handles resize/exit via text frames - Login shell via /usr/bin/login -fp for full environment - PTY I/O on dedicated serial queue with stale fd guard - Write retry on EAGAIN, bails out when cleanup invalidates fd Host proxy (HostAPIService): - Detects /api/v1/shell and switches to bidirectional byte bridge - Validates upgrade request forwarding, aborts on failure - Write retry on all handshake and bridge writes Client (vmctl): - WebSocket handshake, raw terminal mode, SIGWINCH/SIGINT handling - Write retry on WebSocket frames and stdout output - CPty C module exposes forkpty/openpty to Swift Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Terminal toolbar dropdown: - Open Terminal: launches Terminal.app with vmctl shell via temp script - Copy vmctl Command: copies full absolute shell-escaped path vmctl.app copied into VM bundle's Helper/ directory on launch so it has a stable known path. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
New VMs use ASIF (Apple Sparse Image Format) for near-native SSD performance via diskutil image create blank --format ASIF. Migration for old VMs: - Detects raw disk format via magic bytes (DiskFormatUtilities) - Custom NSPanel prompt (avoids NSAlert SwiftUI animation crash) - NSSavePanel for destination, terminal-style progress window - diskutil image create from --format ASIF (handles sparsity) - Cancel terminates diskutil process, synchronized isCancelled - Verifies output is valid ASIF after conversion - Boot Now button with orderOut/delayed close pattern - Old VM never modified, skipHelperCopy for legacy launches - Warns that snapshots and suspend state are not migrated - GhostTools.dmg attachment non-fatal (logs error, boots without) - GhostTools.dmg uses makehybrid format for USB auto-mount Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
The old fetch path read the full file into memory on the guest, sent it
in a single response, then loaded the entire response into memory on the
host. Large files were unbounded RAM. Switch GET /api/v1/files/{path} to
a NIO streaming handler using NonBlockingFileIO, and rewrite the vsock
client to read Content-Length bytes directly to a temp file with
progress callbacks. fetchFile now takes a destination URL.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
ShellHandler previously did blocking writes to the PTY master fd on a serial queue, which stalled reads behind a slow shell. Add a separate DispatchSourceWrite that drains a write buffer only when the fd is writable, so reads and writes are fully independent. vmctl shell replaces the select()-based loop and blocking socket writes with dispatch read/write sources on a shared serial ioQueue. The write source drains a pending byte buffer; SIGINT and SIGWINCH enqueue frames through the same path. Removes the timeout-then-fatal write retry that could kill the session on transient EAGAIN. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
The Makefile debug target codesigns each binary with an entitlements-debug.plist, but the files weren't tracked. They drop the team-identifier and com.apple.vm.networking keys (which require a provisioning profile) so the export can be signed ad-hoc with "-". Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Announces vmctl shell, ASIF disks, SwiftNIO guest agent, macOS 26 / Swift 6 migration, and bridged-network resilience. Package-lock pulls in the unrelated dev:true churn from a recent npm install. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
testDisconnectErrnoClassification and testOperationalBridgeErrorClassification called tunnelIsDisconnectErrno / tunnelIsOperationalBridgeError, which no longer exist in Sources/. Marking them as XCTSkip so the suite compiles; the cases need a separate triage to either restore the helpers or delete the tests outright. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
No client speaks HTTP/2 over vsock — every existing caller in GhostClient and vmctl hand-rolls HTTP/1.1. The dual-stack support was carrying a ProtocolDetector that swapped the channel pipeline asynchronously after sniffing the first 24 bytes for the H/2 preface. That swap raced with inbound data on fast senders (large file uploads, tight vmctl loops), silently dropping the bytes that arrived between detection and the removeHandler future completing. Server bootstrap is now a single configureHTTPServerPipeline(withServerUpgrade:) call — the WS upgrader handles /api/v1/shell, everything else goes through StreamDispatcher. No detection, no pipeline swap, no race. Drops the swift-nio-http2 dependency. Tracking the host-side client migration to NIOHTTP1 in #227 (blocked on Xcode 26 SPM bug). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Setting STDIN_FILENO to O_NONBLOCK during the dispatch-source refactor
inadvertently flips STDOUT to non-blocking too — on a terminal, fd 0/1/2
share the same open file description, so O_NONBLOCK propagates between
them. Under TUI redraw bursts (vim, htop, …) the kernel terminal buffer
fills, write() returns EAGAIN with bytes still pending, and the inlined
write loop took the "else { break }" path, dropping the rest of the
frame. Output came through garbled.
The pre-refactor writeAll helper handled this with a usleep(1000) retry;
the inline loop lost that. Restore EAGAIN retry alongside EINTR.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
…ntly The streaming-fetch body-read loop had three silent-exit paths: - n == 0 (server closed mid-stream) → break, return success - n < 0 with EAGAIN/other errno → break, return success The caller saw success, ran moveItem on a half-written temp file, and either renamed garbage or hit a downstream error that left the .ghostvm-partial behind. With "Send to host" producing random partial sizes on repeated tries, we had no idea where the cut-off was happening. Now: throw GhostClientError.connectionFailed with the byte position and errno, log it via NSLog so it lands in Console, and have the batch and single-file callers remove the .ghostvm-partial temp on error. EAGAIN also retries (was already excluded for blocking fd but harmless). This makes the underlying transport bug visible; doesn't fix it yet. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Host-side read() was hanging indefinitely after receiving ~10 MB of a
13 MB GhostTools.dmg. Stack sample on the helper showed the worker
thread parked in Darwin.read called from fetchFileStreamingViaVsock,
exactly where the body-read loop expects more bytes.
Server logs confirmed all 13 MB had been pushed through readChunked and
.end had been flushed successfully — but we left the channel open with
a "let the host close after reading all data" comment. That comment was
wrong on two counts:
1. Connection: close in the response header is documentation for the
peer; NIO doesn't auto-close on it for our pipeline shape.
2. With the channel open, ~3 MB sit in NIO's outbound buffer waiting
for kernel buffer space, kernel buffer waits for the host to read,
host reads up to the kernel buffer and then blocks waiting for
more bytes — deadlock.
Always call context.close(promise: nil) after the .end's flush future
fires. NIO's graceful close drains outbound before closing the fd, so
the comment's "discards buffered outbound data" concern doesn't apply
to graceful close — only to context.close(mode: .all, …).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Pure-Darwin Swift package (zero third-party deps) that demonstrates the kernel-level data-loss bug on AF_VSOCK from a macOS guest: write() returns success for 128 MiB in 20 ms with zero EAGAINs, receiver via VZVirtioSocket gets ~5 MiB. EVFILT_WRITE never fires; close() drops pending kernel data. Documented in NOTES.md alongside the full investigation history, three suspected kernel defects, filing playbook for Feedback Assistant + TSI + Apple Developer Forums + WWDC labs, and workaround options for the GhostVM project. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
`vmctl vsock connect [--name VM | --socket path] <port>` opens a raw vsock connection to the guest at the given port and bridges it to vmctl's stdin/stdout. Useful for probing endpoints, capturing streams, scripting arbitrary protocols over vsock. vmctl vsock connect -n MyVM 5004 | dd of=/dev/null bs=1M printf 'GET / HTTP/1.1\r\nHost:x\r\n\r\n' | vmctl vsock connect -n MyVM 5000 Helper side gains /api/v1/vsock-connect endpoint that reads a Vsock-Port header, opens a vsock via connectRaw, and bridges bytes through the shared blocking-bridge helper (refactored out of handleShellProxy so both shell and generic vsock connect share the same byte-bridge code). Used as the receive side of the AF_VSOCK write-loss reproducer in bug-repros/macos-vsock-write-loss/. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
NSLog from sandboxed/codesigned helpers gets redacted to <private> in the unified log even with --info --debug. Switch to os.Logger with explicit privacy: .public annotations so we can actually see byte counts, paths, and errors in `log show` output. Added throughout fetchFileStreamingViaVsock and fetchAllGuestFiles. Also adds an early-EOF check in the body-read loop that throws and reports N/total bytes instead of silently returning a partial file. The batch caller cleans up the .ghostvm-partial temp on error. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Replace SwiftNIO-based async server with a blocking thread-per-connection design under Server/BlockingServer (VsockListener, ConnectionWorker, TunnelService, EventPushService, WebSocketShell). Extract HTTP/1.1 + WebSocket codec into a standalone GhostHTTP Swift package. Update host-side clients (GhostClient, HealthCheckService, EventStreamService, PortForwardListener, HostAPIService, vmctl) to match, and add WebSocketShellClient for the new shell transport. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Continuation frames are now buffered until FIN=1 and delivered as a single message with the original opcode. Control frames may interleave between fragments per RFC 6455. Protocol violations (fragmented control frames, unexpected continuations, new data frame mid-fragment) surface as a synthetic close. Adds WSFrameParserTests covering happy-path fragmentation, interleaved ping, and three protocol-error cases. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Superseded by #229. v3 work continues on the |
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Summary
Supersedes #215. Same v3 feature set (interactive
vmctl shell, Terminal toolbar item, streaming file transfer) but built on a blocking thread-per-connection server instead of SwiftNIO.Why we backed out NIO
swift-niorelies on non-blocking I/O +kqueue/EVFILT_WRITEfor back-pressure. On macOSAF_VSOCK,EVFILT_WRITEdoes not fire reliably once the kernel send buffer fills, and non-blockingwrite()cheerfully returns "success" for bytes the kernel never delivers. Result: any response over ~10 MiB silently truncates. Reproducer (4/4 runs, 128 MiB requested → ~4–5 MiB delivered) and full investigation notes: https://gist.github.com/groundwater/db1ae70c5a9b90e39e1143a967bc0ef7 The blocking-write path parks the thread in the kernel until bytes are actually accepted, so it sidesteps the bug entirely.What landed
Server (blocking I/O)
Server/BlockingServer/—VsockListeneraccept loop, thread-per-connectionConnectionWorker, HTTP/1.1 + WebSocket via the newGhostHTTPpackageTunnelServicefor arbitrary TCP forwardingEventPushServicefor server→client event streamsWebSocketShell— PTY-backed interactive shell with resize control messagesGhostHTTP package
Packages/GhostHTTP/Swift package: standalone HTTP/1.1 codec + WebSocket frame parser/encodervmctl shell
/usr/bin/login -fpover WebSocketHost clients
GhostClient,HealthCheckService,EventStreamService,PortForwardListener,HostAPIService,vmctlrewritten against blocking transportWebSocketShellClientinGhostVMKitvmctl vsock connect— netcat-style raw vsock pipe (debug aid)Misc
os.Loggeradopted across FileTransfer + GhostClient.gitignore:.build/,.DS_StoreTest plan
swift testinPackages/GhostHTTP— 8/8 greenswift testinmacOS/GhostTools— 23/23 green (incl. WS shell integration + fragmentation)make debug-dmg— notarized DMG built (this PR's build: GhostVM-3.0.20260511175720.dmg)vmctl— verify no truncation🤖 Generated with Claude Code