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feat: P0-2a C-side plumbing for host control

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Add the full call chain for host control operations from the Go API
server through the C library to the controller:

- schema/controller.capnp: HostControl struct + hostctrlmsg @21
  in Request.body union
- include/typemap.h: xce_hostctrl_t* hostctrlmsg in body union
  (placed after @20 clrpreasonmsg, matching capnp ordinal)
- include/client.h, xceapi.h, request.h: declarations for
  xcecli_hostctrl, xce_hostctrl, xce_hostctrl_req
- lib/client.c: xcecli_hostctrl (validate + delegate to xce_hostctrl)
- lib/xceapi.c: xce_hostctrl (validate ctx state + send + wait reply)
- lib/request.c: xce_hostctrl_req (validate hostname/empty/nil,
  accept only HOST_OPEN/HOST_CLOSE, reject HOST_TAG/UNTAG)
- lib/helper.c: Request_body_hostctrlmsg cases in
  xce_request_body() and xce_request_msg_name()
- controller/cluster.c: OPCode_hostcontrol dispatch
- controller/include/cluster.h: do_hostcontrol_op declaration
- controller/worker.c: do_hostcontrol_op + fix pre-existing
  goto-clean bug in worker_ctrl that leaked write lock and
  reference on HOST_OPEN/HOST_CLOSE no-op paths

TDD: 8 xce_hostctrl_req validation tests (null ep, null ctrl,
null/empty hostname, HOST_DO_NONE no-op, HOST_TAG/UNTAG reject,
negative action reject, HOST_OPEN/CLOSE accept via xce_request).

116/116 xcelib tests pass. CGO_ENABLED=0 Go backend tests pass.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
Rongsong Shen 2026-04-17 07:46:41 +00:00
parent ac7ac99ced
commit dcb1b4fe25
15 changed files with 187 additions and 4 deletions
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6
src/schema/controller.capnp
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@ -515,6 +515,11 @@ struct QueueControl $C.mapname("xce_queuectrl_t") {
queue @1: Text $C.mapname("queue");
}
struct HostControl $C.mapname("xce_hostctrl_t") {
action @0: UInt32 $C.mapname("action");
hostname @1: Text $C.mapname("hostname");
}
struct RequestReply $C.mapname("xce_reply_t"){
seq @0: UInt64;
opcode @1: OPCode;
@ -582,6 +587,7 @@ struct Request $C.mapname("xce_request_t"){
runtaskmsg @18: RunTask;
preasonmsg @19: PendReasonSet;
clrpreasonmsg @20: ClearPReason;
hostctrlmsg @21: HostControl;
}
}