mirror of https://github.com/minio/minio.git
112 lines
3.3 KiB
Go
112 lines
3.3 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
|
|
//
|
|
// This file is part of MinIO Object Storage stack
|
|
//
|
|
// This program is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
package cmd
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
|
|
"github.com/minio/minio/internal/dsync"
|
|
"github.com/minio/minio/internal/grid"
|
|
)
|
|
|
|
// lockRESTClient is authenticable lock REST client
|
|
type lockRESTClient struct {
|
|
connection *grid.Connection
|
|
}
|
|
|
|
// IsOnline - returns whether REST client failed to connect or not.
|
|
func (c *lockRESTClient) IsOnline() bool {
|
|
return c.connection.State() == grid.StateConnected
|
|
}
|
|
|
|
// Not a local locker
|
|
func (c *lockRESTClient) IsLocal() bool {
|
|
return false
|
|
}
|
|
|
|
// Close - marks the client as closed.
|
|
func (c *lockRESTClient) Close() error {
|
|
return nil
|
|
}
|
|
|
|
// String - returns the remote host of the connection.
|
|
func (c *lockRESTClient) String() string {
|
|
return c.connection.Remote
|
|
}
|
|
|
|
func (c *lockRESTClient) call(ctx context.Context, h *grid.SingleHandler[*dsync.LockArgs, *dsync.LockResp], args *dsync.LockArgs) (ok bool, err error) {
|
|
r, err := h.Call(ctx, c.connection, args)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
defer h.PutResponse(r)
|
|
ok = r.Code == dsync.RespOK
|
|
switch r.Code {
|
|
case dsync.RespLockConflict, dsync.RespLockNotFound, dsync.RespOK:
|
|
// no error
|
|
case dsync.RespLockNotInitialized:
|
|
err = errLockNotInitialized
|
|
default:
|
|
err = errors.New(r.Err)
|
|
}
|
|
return ok, err
|
|
}
|
|
|
|
// RLock calls read lock REST API.
|
|
func (c *lockRESTClient) RLock(ctx context.Context, args dsync.LockArgs) (reply bool, err error) {
|
|
return c.call(ctx, lockRPCRLock, &args)
|
|
}
|
|
|
|
// Lock calls lock REST API.
|
|
func (c *lockRESTClient) Lock(ctx context.Context, args dsync.LockArgs) (reply bool, err error) {
|
|
return c.call(ctx, lockRPCLock, &args)
|
|
}
|
|
|
|
// RUnlock calls read unlock REST API.
|
|
func (c *lockRESTClient) RUnlock(ctx context.Context, args dsync.LockArgs) (reply bool, err error) {
|
|
return c.call(ctx, lockRPCRUnlock, &args)
|
|
}
|
|
|
|
// Refresh calls Refresh REST API.
|
|
func (c *lockRESTClient) Refresh(ctx context.Context, args dsync.LockArgs) (reply bool, err error) {
|
|
return c.call(ctx, lockRPCRefresh, &args)
|
|
}
|
|
|
|
// Unlock calls write unlock RPC.
|
|
func (c *lockRESTClient) Unlock(ctx context.Context, args dsync.LockArgs) (reply bool, err error) {
|
|
return c.call(ctx, lockRPCUnlock, &args)
|
|
}
|
|
|
|
// ForceUnlock calls force unlock handler to forcibly unlock an active lock.
|
|
func (c *lockRESTClient) ForceUnlock(ctx context.Context, args dsync.LockArgs) (reply bool, err error) {
|
|
return c.call(ctx, lockRPCForceUnlock, &args)
|
|
}
|
|
|
|
func newLockAPI(endpoint Endpoint) dsync.NetLocker {
|
|
if endpoint.IsLocal {
|
|
return globalLockServer
|
|
}
|
|
return newlockRESTClient(endpoint)
|
|
}
|
|
|
|
// Returns a lock rest client.
|
|
func newlockRESTClient(ep Endpoint) *lockRESTClient {
|
|
return &lockRESTClient{globalGrid.Load().Connection(ep.GridHost())}
|
|
}
|