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forwarder.go
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/
forwarder.go
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//
// (C) Copyright 2019 Intel Corporation.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// GOVERNMENT LICENSE RIGHTS-OPEN SOURCE SOFTWARE
// The Government's rights to use, modify, reproduce, release, perform, display,
// or disclose this software are subject to the terms of the Apache License as
// provided in Contract No. 8F-30005.
// Any reproduction of computer software, computer software documentation, or
// portions thereof marked with this legend must also reproduce the markings.
//
package scm
import (
"context"
"encoding/json"
"github.com/pkg/errors"
"github.com/daos-stack/daos/src/control/common"
"github.com/daos-stack/daos/src/control/logging"
"github.com/daos-stack/daos/src/control/pbin"
)
type Forwarder struct {
log logging.Logger
}
func (f *Forwarder) sendReq(method string, fwdReq interface{}, fwdRes interface{}) error {
if fwdReq == nil {
return errors.New("nil request")
}
if fwdRes == nil {
return errors.New("nil response")
}
pbinPath, err := common.FindBinary(pbin.DaosAdminName)
if err != nil {
return err
}
payload, err := json.Marshal(fwdReq)
if err != nil {
return errors.Wrap(err, "failed to marshal forwarded request as payload")
}
req := &pbin.Request{
Method: method,
Payload: payload,
}
ctx := context.TODO()
res, err := pbin.ExecReq(ctx, f.log, pbinPath, req)
if err != nil {
if pbin.IsFailedRequest(err) {
return err
}
return errors.Wrap(err, "privileged binary execution failed")
}
if err := json.Unmarshal(res.Payload, fwdRes); err != nil {
return errors.Wrap(err, "failed to unmarshal forwarded response")
}
return nil
}
func (f *Forwarder) Mount(req MountRequest) (*MountResponse, error) {
req.Forwarded = true
var res MountResponse
if err := f.sendReq("ScmMount", req, &res); err != nil {
return nil, err
}
return &res, nil
}
func (f *Forwarder) Unmount(req MountRequest) (*MountResponse, error) {
req.Forwarded = true
var res MountResponse
if err := f.sendReq("ScmUnmount", req, &res); err != nil {
return nil, err
}
return &res, nil
}
func (f *Forwarder) Format(req FormatRequest) (*FormatResponse, error) {
req.Forwarded = true
var res FormatResponse
if err := f.sendReq("ScmFormat", req, &res); err != nil {
return nil, err
}
return &res, nil
}
func (f *Forwarder) CheckFormat(req FormatRequest) (*FormatResponse, error) {
req.Forwarded = true
var res FormatResponse
if err := f.sendReq("ScmCheckFormat", req, &res); err != nil {
return nil, err
}
return &res, nil
}
func (f *Forwarder) Scan(req ScanRequest) (*ScanResponse, error) {
req.Forwarded = true
var res ScanResponse
if err := f.sendReq("ScmScan", req, &res); err != nil {
return nil, err
}
return &res, nil
}
func (f *Forwarder) Prepare(req PrepareRequest) (*PrepareResponse, error) {
req.Forwarded = true
var res PrepareResponse
if err := f.sendReq("ScmPrepare", req, &res); err != nil {
return nil, err
}
return &res, nil
}