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minio/cmd/storage-rpc-server.go

232 lines
6.6 KiB

/*
* Minio Cloud Storage, (C) 2016 Minio, Inc.
*
* 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.
*/
package cmd
import (
"io"
"path"
"github.com/gorilla/mux"
"github.com/minio/minio/cmd/logger"
xrpc "github.com/minio/minio/cmd/rpc"
)
const storageServiceName = "Storage"
const storageServiceSubPath = "/storage"
var storageServicePath = path.Join(minioReservedBucketPath, storageServiceSubPath)
// storageRPCReceiver - Storage RPC receiver for storage RPC server
type storageRPCReceiver struct {
local *posix
}
// VolArgs - generic volume args.
type VolArgs struct {
AuthArgs
Vol string
}
/// Storage operations handlers.
// Connect - authenticates remote connection.
func (receiver *storageRPCReceiver) Connect(args *AuthArgs, reply *VoidReply) (err error) {
return args.Authenticate()
}
// DiskInfo - disk info handler is rpc wrapper for DiskInfo operation.
func (receiver *storageRPCReceiver) DiskInfo(args *AuthArgs, reply *DiskInfo) (err error) {
*reply, err = receiver.local.DiskInfo()
return err
}
/// Volume operations handlers.
// MakeVol - make vol handler is rpc wrapper for MakeVol operation.
func (receiver *storageRPCReceiver) MakeVol(args *VolArgs, reply *VoidReply) error {
return receiver.local.MakeVol(args.Vol)
}
// ListVols - list vols handler is rpc wrapper for ListVols operation.
func (receiver *storageRPCReceiver) ListVols(args *AuthArgs, reply *[]VolInfo) (err error) {
*reply, err = receiver.local.ListVols()
return err
}
// StatVol - stat vol handler is a rpc wrapper for StatVol operation.
func (receiver *storageRPCReceiver) StatVol(args *VolArgs, reply *VolInfo) (err error) {
*reply, err = receiver.local.StatVol(args.Vol)
return err
}
// DeleteVol - delete vol handler is a rpc wrapper for
// DeleteVol operation.
func (receiver *storageRPCReceiver) DeleteVol(args *VolArgs, reply *VoidReply) error {
return receiver.local.DeleteVol(args.Vol)
}
/// File operations
// StatFileArgs represents stat file RPC arguments.
type StatFileArgs struct {
AuthArgs
Vol string
Path string
}
// StatFile - stat file handler is rpc wrapper to stat file.
func (receiver *storageRPCReceiver) StatFile(args *StatFileArgs, reply *FileInfo) (err error) {
*reply, err = receiver.local.StatFile(args.Vol, args.Path)
return err
}
// ListDirArgs represents list contents RPC arguments.
type ListDirArgs struct {
AuthArgs
Vol string
Path string
Count int
}
// ListDir - list directory handler is rpc wrapper to list dir.
func (receiver *storageRPCReceiver) ListDir(args *ListDirArgs, reply *[]string) (err error) {
*reply, err = receiver.local.ListDir(args.Vol, args.Path, args.Count)
return err
}
// ReadAllArgs represents read all RPC arguments.
type ReadAllArgs struct {
AuthArgs
Vol string
Path string
}
// ReadAll - read all handler is rpc wrapper to read all storage API.
func (receiver *storageRPCReceiver) ReadAll(args *ReadAllArgs, reply *[]byte) (err error) {
*reply, err = receiver.local.ReadAll(args.Vol, args.Path)
return err
}
// ReadFileArgs represents read file RPC arguments.
type ReadFileArgs struct {
AuthArgs
Vol string
Path string
Offset int64
Buffer []byte
Algo BitrotAlgorithm
ExpectedHash []byte
Verified bool
}
// ReadFile - read file handler is rpc wrapper to read file.
func (receiver *storageRPCReceiver) ReadFile(args *ReadFileArgs, reply *[]byte) error {
var verifier *BitrotVerifier
if !args.Verified {
verifier = NewBitrotVerifier(args.Algo, args.ExpectedHash)
}
n, err := receiver.local.ReadFile(args.Vol, args.Path, args.Offset, args.Buffer, verifier)
// Ignore io.ErrEnexpectedEOF for short reads i.e. less content available than requested.
if err == io.ErrUnexpectedEOF {
err = nil
}
*reply = args.Buffer[0:n]
return err
}
// PrepareFileArgs represents append file RPC arguments.
type PrepareFileArgs struct {
AuthArgs
Vol string
Path string
Size int64
}
// PrepareFile - prepare file handler is rpc wrapper to prepare file.
func (receiver *storageRPCReceiver) PrepareFile(args *PrepareFileArgs, reply *VoidReply) error {
return receiver.local.PrepareFile(args.Vol, args.Path, args.Size)
}
// AppendFileArgs represents append file RPC arguments.
type AppendFileArgs struct {
AuthArgs
Vol string
Path string
Buffer []byte
}
// AppendFile - append file handler is rpc wrapper to append file.
func (receiver *storageRPCReceiver) AppendFile(args *AppendFileArgs, reply *VoidReply) error {
return receiver.local.AppendFile(args.Vol, args.Path, args.Buffer)
}
// DeleteFileArgs represents delete file RPC arguments.
type DeleteFileArgs struct {
AuthArgs
Vol string
Path string
}
// DeleteFile - delete file handler is rpc wrapper to delete file.
func (receiver *storageRPCReceiver) DeleteFile(args *DeleteFileArgs, reply *VoidReply) error {
return receiver.local.DeleteFile(args.Vol, args.Path)
}
// RenameFileArgs represents rename file RPC arguments.
type RenameFileArgs struct {
AuthArgs
SrcVol string
SrcPath string
DstVol string
DstPath string
}
// RenameFile - rename file handler is rpc wrapper to rename file.
func (receiver *storageRPCReceiver) RenameFile(args *RenameFileArgs, reply *VoidReply) error {
return receiver.local.RenameFile(args.SrcVol, args.SrcPath, args.DstVol, args.DstPath)
}
// NewStorageRPCServer - returns new storage RPC server.
func NewStorageRPCServer(endpointPath string) (*xrpc.Server, error) {
storage, err := newPosix(endpointPath)
if err != nil {
return nil, err
}
rpcServer := xrpc.NewServer()
if err = rpcServer.RegisterName(storageServiceName, &storageRPCReceiver{storage}); err != nil {
return nil, err
}
return rpcServer, nil
}
// registerStorageRPCRouter - register storage rpc router.
func registerStorageRPCRouters(router *mux.Router, endpoints EndpointList) {
for _, endpoint := range endpoints {
if endpoint.IsLocal {
rpcServer, err := NewStorageRPCServer(endpoint.Path)
if err != nil {
logger.Fatal(uiErrUnableToWriteInBackend(err), "Unable to configure one of server's RPC services")
}
subrouter := router.PathPrefix(minioReservedBucketPath).Subrouter()
subrouter.Path(path.Join(storageServiceSubPath, endpoint.Path)).HandlerFunc(httpTraceHdrs(rpcServer.ServeHTTP))
}
}
}