[PATCH RFC 4/8] golang/xenlight: Implement libxl_domain_info and libxl_domain_unpause

[Ronald Rojas <ronladred@gmail.com>]

Add calls for the following host-related functionality:
- libxl_domain_info
- libxl_domain_unpause

Include Golang version for the libxl_domain_info as
DomainInfo.

Signed-off-by: George Dunlap <george.dunlap@citrix.com>
Signed-off-by: Ronald Rojas <ronladred@gmail.com>
---
 tools/golang/xenlight/xenlight.go | 92 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 92 insertions(+)

diff --git a/tools/golang/xenlight/xenlight.go b/tools/golang/xenlight/xenlight.go
index 92410a8..dd6893c 100644
--- a/tools/golang/xenlight/xenlight.go
+++ b/tools/golang/xenlight/xenlight.go
@@ -36,6 +36,7 @@ import "C"
 import (
 	"fmt"
 	"unsafe"
+	"time"
 )
 
 /*
@@ -104,6 +105,12 @@ var errors = [...]string{
  * Types: Builtins
  */
 
+type Domid uint32
+
+type MemKB uint64
+
+type Uuid C.libxl_uuid
+
 type Context struct {
 	ctx *C.libxl_ctx
 }
@@ -165,6 +172,32 @@ type VersionInfo struct {
 	BuildId          string
 }
 
+type Dominfo struct {
+	Uuid       Uuid
+	Domid      Domid
+	Ssidref uint32
+	SsidLabel string
+	Running    bool
+	Blocked    bool
+	Paused     bool
+	Shutdown   bool
+	Dying      bool
+	NeverStop bool
+
+	ShutdownReason   int32 // FIXME shutdown_reason enumeration
+	OutstandingMemkb MemKB
+	CurrentMemkb     MemKB
+	SharedMemkb      MemKB
+	PagedMemkb       MemKB
+	MaxMemkb         MemKB
+	CpuTime          time.Duration
+	VcpuMaxId       uint32
+	VcpuOnline       uint32
+	Cpupool           uint32
+	DomainType       int32 //FIXME libxl_domain_type enumeration
+
+}
+
 /*
  * Context
  */
@@ -343,3 +376,62 @@ func (Ctx *Context) GetVersionInfo() (info *VersionInfo, err error) {
 
 	return
 }
+
+func (Ctx *Context) DomainInfo(Id Domid) (di *Dominfo, err error) {
+	err = Ctx.CheckOpen()
+	if err != nil {
+		return
+	}
+
+	var cdi C.libxl_dominfo
+
+	ret := C.libxl_domain_info(Ctx.ctx, unsafe.Pointer(&cdi), C.uint32_t(Id))
+
+	if ret != 0 {
+		err = Error(-ret)
+		return
+	}
+
+	// We could consider having this boilerplate generated by the
+	// idl, in a function like this:
+	//
+	// di = translateCdomaininfoToGoDomaininfo(cdi)
+	di = &Dominfo{}
+	di.Uuid = Uuid(cdi.uuid)
+	di.Domid = Domid(cdi.domid)
+	di.Ssidref = uint32(cdi.ssidref)
+	di.SsidLabel = C.GoString(cdi.ssid_label)
+	di.Running = bool(cdi.running)
+	di.Blocked = bool(cdi.blocked)
+	di.Paused = bool(cdi.paused)
+	di.Shutdown = bool(cdi.shutdown)
+	di.Dying = bool(cdi.dying)
+	di.NeverStop= bool(cdi.never_stop)
+	di.ShutdownReason= int32(cdi.shutdown_reason)
+	di.OutstandingMemkb= MemKB(cdi.outstanding_memkb)
+	di.CurrentMemkb = MemKB(cdi.current_memkb)
+	di.SharedMemkb = MemKB(cdi.shared_memkb)
+	di.PagedMemkb = MemKB(cdi.paged_memkb)
+	di.MaxMemkb= MemKB(cdi.max_memkb)
+	di.CpuTime= time.Duration(cdi.cpu_time)
+	di.VcpuMaxId = uint32(cdi.vcpu_max_id)
+	di.VcpuOnline = uint32(cdi.vcpu_online)
+	di.Cpupool = uint32(cdi.cpupool)
+	di.DomainType = int32(cdi.domain_type)
+
+	return
+}
+
+func (Ctx *Context) DomainUnpause(Id Domid) (err error) {
+	err = Ctx.CheckOpen()
+	if err != nil {
+		return
+	}
+
+	ret := C.libxl_domain_unpause(Ctx.ctx, C.uint32_t(Id))
+
+	if ret != 0 {
+		err = Error(-ret)
+	}
+	return
+}
-- 
2.7.4


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