120 lines
3.8 KiB
C
120 lines
3.8 KiB
C
/*
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* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
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*
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* This program is free software: you can use, redistribute, and/or modify
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* it under the terms of the GNU Affero General Public License, version 3
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* or later ("AGPL"), as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TDENGINE_SYNC_H
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#define TDENGINE_SYNC_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define TAOS_SYNC_MAX_REPLICA 5
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typedef enum _TAOS_SYNC_ROLE {
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TAOS_SYNC_ROLE_OFFLINE,
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TAOS_SYNC_ROLE_UNSYNCED,
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TAOS_SYNC_ROLE_SLAVE,
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TAOS_SYNC_ROLE_MASTER,
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} ESyncRole;
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typedef enum _TAOS_SYNC_STATUS {
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TAOS_SYNC_STATUS_INIT,
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TAOS_SYNC_STATUS_START,
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TAOS_SYNC_STATUS_FILE,
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TAOS_SYNC_STATUS_CACHE,
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} ESyncStatus;
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typedef struct {
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uint32_t nodeId; // node ID assigned by TDengine
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uint16_t nodePort; // node sync Port
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char nodeFqdn[TSDB_FQDN_LEN]; // node FQDN
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} SNodeInfo;
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typedef struct {
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int8_t quorum; // number of confirms required, >=1
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int8_t replica; // number of replications, >=1
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SNodeInfo nodeInfo[TAOS_SYNC_MAX_REPLICA];
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} SSyncCfg;
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typedef struct {
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int selfIndex;
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uint32_t nodeId[TAOS_SYNC_MAX_REPLICA];
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int role[TAOS_SYNC_MAX_REPLICA];
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} SNodesRole;
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// if name is empty(name[0] is zero), get the file from index or after, used by master
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// if name is provided(name[0] is not zero), get the named file at the specified index, used by unsynced node
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// it returns the file magic number and size, if file not there, magic shall be 0.
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typedef uint32_t (*FGetFileInfo)(void *ahandle, char *name, uint32_t *index, int32_t *size, uint64_t *fversion);
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// get the wal file from index or after
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// return value, -1: error, 1:more wal files, 0:last WAL. if name[0]==0, no WAL file
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typedef int (*FGetWalInfo)(void *ahandle, char *name, uint32_t *index);
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// when a forward pkt is received, call this to handle data
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typedef int (*FWriteToCache)(void *ahandle, void *pHead, int type);
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// when forward is confirmed by peer, master call this API to notify app
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typedef void (*FConfirmForward)(void *ahandle, void *mhandle, int32_t code);
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// when role is changed, call this to notify app
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typedef void (*FNotifyRole)(void *ahandle, int8_t role);
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// when data file is synced successfully, notity app
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typedef void (*FNotifyFileSynced)(void *ahandle, uint64_t fversion);
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typedef struct {
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int32_t vgId; // vgroup ID
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uint64_t version; // initial version
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SSyncCfg syncCfg; // configuration from mgmt
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char path[128]; // path to the file
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void *ahandle; // handle provided by APP
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FGetFileInfo getFileInfo;
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FGetWalInfo getWalInfo;
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FWriteToCache writeToCache;
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FConfirmForward confirmForward;
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FNotifyRole notifyRole;
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FNotifyFileSynced notifyFileSynced;
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} SSyncInfo;
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typedef void* tsync_h;
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tsync_h syncStart(const SSyncInfo *);
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void syncStop(tsync_h shandle);
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int syncReconfig(tsync_h shandle, const SSyncCfg *);
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int syncForwardToPeer(tsync_h shandle, void *pHead, void *mhandle, int qtype);
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void syncConfirmForward(tsync_h shandle, uint64_t version, int32_t code);
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void syncRecover(tsync_h shandle); // recover from other nodes:
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int syncGetNodesRole(tsync_h shandle, SNodesRole *);
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extern char *syncRole[];
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//global configurable parameters
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extern int tsMaxSyncNum;
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extern int tsSyncTcpThreads;
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extern int tsMaxWatchFiles;
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extern int tsSyncTimer;
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extern int tsMaxFwdInfo;
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extern int sDebugFlag;
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extern char tsArbitrator[];
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extern uint16_t tsSyncPort;
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#ifdef __cplusplus
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}
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#endif
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#endif // TDENGINE_SYNC_H
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