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3 Commits
Author SHA1 Message Date
Ping QiuandClaude Opus 4.6 bd73a81e00 fix: handle pipelined SCSI commands during Data-Out collection 
The Linux kernel iSCSI initiator pipelines multiple SCSI commands on
the same TCP connection (command queuing). When a write needs R2T for
data beyond the immediate portion, collectDataOut may read a pipelined
SCSI command instead of the expected Data-Out PDU.

Fix: queue non-Data-Out PDUs received during collectDataOut into a
pending buffer. The main dispatch loop drains pending PDUs before
reading from the connection. This correctly handles interleaved
commands during multi-PDU write transfers.

Bug found during WSL2 smoke test: mkfs.ext4 hangs at "Writing
superblocks" because inode table zeroing sends large writes that
exceed FirstBurstLength, triggering R2T while the kernel has already
queued the next command.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-02-28 10:08:32 -08:00
Ping QiuandClaude Opus 4.6 6546c549eb fix: iSCSI login and discovery bugs found in WSL2 smoke test 
- Skip InitiatorAlias in negotiation (was returning NotUnderstood)
- Capture TargetName in StageLoginOp direct-jump path (iscsiadm skips
  security stage, sends CSG=LoginOp directly -- nil SCSIHandler crash)
- Add portalAddr to TargetServer for discovery responses (listener on
  [::] is not routable from WSL2 clients)
- Add -portal flag to iscsi-target binary

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-02-28 10:04:41 -08:00
Ping QiuandClaude Opus 4.6 6a400f6760 feat: add BlockVol engine and iSCSI target (Phase 1 + Phase 2) 
Phase 1: Extent-mapped block storage engine with WAL, crash recovery,
dirty map, flusher, and group commit. 174 tests, zero SeaweedFS imports.

Phase 2: Pure Go iSCSI target (RFC 7143) with PDU codec, login
negotiation, SendTargets discovery, 12 SCSI opcodes, Data-In/Out/R2T
sequencing, session management, and standalone iscsi-target binary.
164 tests. IQN->BlockDevice binding via DeviceLookup interface.

Total: 338 tests, 14.6K lines.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
 2026-02-28 09:32:01 -08:00