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Bala.FA
6d10f4c19a
* Rename GenericArgs to AuthRPCArgs * Rename GenericReply to AuthRPCReply * Remove authConfig.loginMethod and add authConfig.ServiceName * Rename loginServer to AuthRPCServer * Rename RPCLoginArgs to LoginRPCArgs * Rename RPCLoginReply to LoginRPCReply * Version and RequestTime are added to LoginRPCArgs and verified by server side, not client side. * Fix data race in lockMaintainence loop.
67 lines
2.0 KiB
Go
67 lines
2.0 KiB
Go
/*
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* Minio Cloud Storage, (C) 2016 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dsync
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import "errors"
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// Number of nodes participating in the distributed locking.
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var dnodeCount int
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// List of rpc client objects, one per lock server.
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var clnts []NetLocker
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// Index into rpc client array for server running on localhost
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var ownNode int
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// Simple majority based quorum, set to dNodeCount/2+1
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var dquorum int
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// Simple quorum for read operations, set to dNodeCount/2
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var dquorumReads int
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// Init - initializes package-level global state variables such as clnts.
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// N B - This function should be called only once inside any program
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// that uses dsync.
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func Init(rpcClnts []NetLocker, rpcOwnNode int) (err error) {
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// Validate if number of nodes is within allowable range.
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if dnodeCount != 0 {
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return errors.New("Cannot reinitialize dsync package")
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}
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if len(rpcClnts) < 4 {
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return errors.New("Dsync is not designed for less than 4 nodes")
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} else if len(rpcClnts) > 16 {
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return errors.New("Dsync is not designed for more than 16 nodes")
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} else if len(rpcClnts)%2 != 0 {
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return errors.New("Dsync is not designed for an uneven number of nodes")
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}
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if rpcOwnNode > len(rpcClnts) {
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return errors.New("Index for own node is too large")
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}
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dnodeCount = len(rpcClnts)
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dquorum = dnodeCount/2 + 1
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dquorumReads = dnodeCount / 2
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// Initialize node name and rpc path for each NetLocker object.
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clnts = make([]NetLocker, dnodeCount)
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copy(clnts, rpcClnts)
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ownNode = rpcOwnNode
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return nil
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}
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