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backup.c
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backup.c
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#include <stdlib.h>
#include <unistd.h>
#include "backup.h"
#include "common.h"
#include "runtime.h"
#include "myconfig.h"
#include "serial.h"
#include "base/zzmalloc.h"
#include "base/pack.h"
#include "base/logfile.h"
#include "base/utils.h"
#include "heartbeat.h"
#include "master.h"
int
switch_backup(int voteid, char *data, int datalen)
{
WThread *wt = g_runtime->wthread;
if (g_cf->role == ROLE_MASTER) {
//释放主节点上保存得备节点得信息
BackupInfo *binfo = wt->backup_info;
BackupItem *bitem;
while(binfo->item) {
bitem = binfo->item;
MBconn *mbconn = bitem->mbconn;
if (mbconn)
//mbconn->destroy((Conn *)mbconn);
mb_conn_destroy_delay((Conn *)mbconn);
bitem->mbconn = NULL;
binfo->item = bitem->next;
zz_free(bitem);
}
backup_init(voteid, data, datalen);
} else if (g_cf->role == ROLE_BACKUP) {
MasterInfo *minfo = wt->master_info;
if (minfo == NULL) {
DERROR("master info is null\n");
return -2;
}
event_del(&minfo->hb_timer_evt);
event_del(&minfo->hbevt);
if (minfo->hbsock > 0) {
close(minfo->hbsock);
minfo->hbsock = -1;
}
/*
if (minfo->conn)
minfo->conn->destroy(minfo->conn);
minfo->conn = NULL;
*/
zz_free(minfo);
wt->master_info = NULL;
backup_init(voteid, data, datalen);
} else {
DINFO("role info error: %d\n", g_cf->role);
return -1;
}
return 0;
}
int
backup_init(int voteid, char *data, int datalen)
{
//int voteid;
char ip[16] = {0};
uint16_t port;
//unpack(data, 0, "ish", &voteid, ip, &port);
//DINFO("backup init, voteid:%d, ip:%s, port:%d\n", voteid, ip, port);
//strcpy(ip, "127.0.0.1");
//port = 31002;
WThread *wt = g_runtime->wthread;
g_cf->role = ROLE_BACKUP;
DNOTE("============I am backup\n");
wt->master_info = zz_malloc(sizeof(MasterInfo));
if (wt->master_info == NULL) {
DERROR("malloc MasterInfo struct error\n");
MEMLINK_EXIT;
}
/*
if (wt->master_info == NULL) {
wt->master_info = zz_malloc(sizeof(MasterInfo));
memset(wt->master_info, 0, sizeof(MasterInfo));
// 添加heartbeat事件
}
*/
MasterInfo *mi = wt->master_info;
memset(mi, 0x0, sizeof(MasterInfo));
g_runtime->voteid = voteid;
int count;
count = unpack_votehost(data, ip, &port);
DINFO("unpack master ip: %s, write_port: %d\n", ip, port);
strcpy(mi->ip, ip);
mi->write_port = port;
//wt->vote_id = voteid;
//strncpy(mi->ip, ip, 15);
//mi->write_port = port;
//mi->hb_port = 30000;
wt->state = STATE_ALLREADY;
mi->hb_port = g_cf->heartbeat_port;
if (wt->clog == NULL) {
wt->clog = commitlog_create();
//wt->clog->state = INCOMPLETE;
}
backup_create_heartbeat(wt);
return MEMLINK_OK;
}
static int
backup_return_not_master(Conn *conn, MasterInfo *mi)
{
char *buf = conn_write_buffer(conn, 32);
int len = pack(buf, 32, "$4hsh", MEMLINK_ERR_NOT_MASTER, mi->ip, mi->write_port);
conn->wlen = len;
conn_send_buffer(conn);
return MEMLINK_REPLIED;
}
int
backup_sync()
{
WThread *wt = g_runtime->wthread;
SSlave *ss = g_runtime->slave;
wt->state = STATE_SYNC;
DINFO("start backup sync thread.\n");
if (g_runtime->slave) {
//sslave_thread(g_runtime->slave);
ss->isrunning = TRUE;
} else {
g_runtime->slave = sslave_create();
sslave_go(g_runtime->slave);
}
//g_cf->role = ROLE_SLAVE;
return 0;
}
int
backup_sync_close()
{
DINFO("close backup sync thread.\n");
SSlave *ss = g_runtime->slave;
ss->isrunning = FALSE;
return 0;
}
static int
backup_ack(Conn *conn, char cmd, short ret)
{
int count;
char *wbuf = conn_write_buffer(conn, 32);
count = pack(wbuf, 32, "$4chii", cmd, ret, g_runtime->synclog->version, g_runtime->synclog->index_pos);
conn->wlen = count;
conn_send_buffer(conn);
return 0;
}
void clean2(void *arg)
{
pthread_mutex_t *mutex = (pthread_mutex_t *)arg;
pthread_mutex_unlock(mutex);
}
static int
backup_last_do(Conn *conn, char cmd)
{
WThread *wt = g_runtime->wthread;
int ret = 0;
int cmdlen;
int lastver, lastline;
//int count;
//char *wbuf = conn_write_buffer(conn, 32);
commitlog_read(wt->clog, &lastver, &lastline);
//从已经写入binlog
if (lastver == g_runtime->synclog->version && lastline < g_runtime->synclog->index_pos) {
DNOTE("SLAVE have write to binlog...\n");
goto ack_master;
}
char *cmddata = commitlog_get_cmd(wt->clog, &cmdlen); // 有可能数据有问题
DINFO("last do, cmdlen:%d\n", cmdlen);
DINFO("=====lock\n");
pthread_cleanup_push(clean2, (void *)&g_runtime->mutex);
pthread_mutex_lock(&g_runtime->mutex);
ret = wdata_apply(cmddata, cmdlen, MEMLINK_NO_LOG, NULL);
DINFO("========ret: %d\n", ret);
if (ret == 0) {
int sret = 0;
sret = synclog_write(g_runtime->synclog, wt->clog->data, wt->clog->len);
if (sret < 0) {
DERROR("synclog_write error: %d\n", sret);
MEMLINK_EXIT;
}
char *cmd;
int cmdlen;
cmd = commitlog_get_cmd(wt->clog, &cmdlen);
sret = syncmem_write(g_runtime->syncmem, cmd, cmdlen,
g_runtime->synclog->version, g_runtime->synclog->index_pos - 1);
if (sret < 0) {
DERROR("syncmem_write error: %d\n", sret);
MEMLINK_EXIT;
}
}
pthread_mutex_unlock(&g_runtime->mutex);
pthread_cleanup_pop(0);
DINFO("=====unlock\n");
if (ret != MEMLINK_OK) {
DINFO("restart slave\n");
backup_sync();
}
// backup return
ack_master:
/*
count = pack(wbuf, 32, "$4chii", cmd, ret, g_runtime->synclog->version, g_runtime->synclog->index_pos);
conn->wlen = count;
conn_send_buffer(conn);*/
backup_ack(conn, cmd, ret);
ret = MEMLINK_REPLIED;
return ret;
}
static int
backup_write_go(Conn *conn, char *data, char cmd, int lastret)
{
int ret = MEMLINK_OK;
WThread *wt = g_runtime->wthread;
//DNOTE("wt->clog->state: %d\n", wt->clog->state);
DINFO("wt->clog->state: %d\n", wt->clog->state);
if (wt->clog->state == INCOMPLETE) { // 未完成
DINFO("last commitlog incomplete.\n");
if (lastret == COMMITED) {
DINFO("do last log.\n");
ret = backup_last_do(conn, cmd);
//return ret;
}else{
DINFO("rollback last log.\n");
/*
int count;
char *wbuf = conn_write_buffer(conn, 32);
count = pack(wbuf, 32, "$4chii", cmd, ret, g_runtime->synclog->version, g_runtime->synclog->index_pos);
conn->wlen = count;
conn_send_buffer(conn);*/
backup_ack(conn, cmd, ret);
ret = MEMLINK_REPLIED;
}
wt->clog->state = lastret;
}
/*
int cmdlen = datalen-sizeof(int)*4+sizeof(char)*2;;
DINFO("write commit log: %d\n", cmdlen);
commitlog_write_data(wt->clog, data+sizeof(int)*4+sizeof(char)*2, cmdlen);
*/
int cmdlen = 0;
DINFO("=======write to commitlog\n");
unpack(data+sizeof(int)*4+sizeof(char), 0, "i", &cmdlen);
memcpy(wt->clog->data, data+sizeof(int)*5+sizeof(char), cmdlen);
wt->clog->len = cmdlen;
wt->clog->state = INCOMPLETE;
if (lastret == 0) {
/*
int count;
char *wbuf = conn_write_buffer(conn, 32);
count = pack(wbuf, 32, "$4chii", cmd, ret, g_runtime->synclog->version, g_runtime->synclog->index_pos);
conn->wlen = count;
conn_send_buffer(conn);*/
backup_ack(conn, cmd, ret);
ret = MEMLINK_REPLIED;
}
return ret;
}
int
backup_cmd_write(Conn *conn, char cmd, char* data, int datalen)
{
WThread *wt = g_runtime->wthread;
int logver, logline, lastver, lastline, lastret;
unpack(data+sizeof(int)+sizeof(char), 0, "iii",
&lastver, &lastline, &lastret);
unpack(data+sizeof(int)*5+sizeof(char), 0, "ii", &logver, &logline);
//DNOTE("cmd write, lastver:%d, lastline:%d, lastret:%d, logver:%d, logline:%d\n",
//lastver, lastline, lastret, logver, logline);
DINFO("cmd write, lastver:%d, lastline:%d, lastret:%d, logver:%d, logline:%d\n",
lastver, lastline, lastret, logver, logline);
//DNOTE("synclog logver: %d, logline: %d\n", g_runtime->synclog->version, g_runtime->synclog->index_pos);
DINFO("synclog logver: %d, logline: %d\n", g_runtime->synclog->version, g_runtime->synclog->index_pos);
// 在SYNC状态可能切换回ALLREADY
if (wt->state == STATE_SYNC) {
if (g_runtime->synclog->version == logver && g_runtime->synclog->index_pos == logline) {
DINFO("change state from SYNC to ALLREADY.\n");
wt->state = STATE_ALLREADY;
//g_runtime->slave->is_backup_do = TRUE;
// 断开主从同步连接
backup_sync_close();
int cmdlen;
unpack(data+sizeof(int)*4+sizeof(char), 0, "i", &cmdlen);
memcpy(wt->clog->data, data+sizeof(int)*5+sizeof(char), cmdlen);
wt->clog->len = cmdlen;
wt->clog->state = INCOMPLETE;
/*int count;
char *wbuf = conn_write_buffer(conn, 32);
count = pack(wbuf, 32, "$4chii", cmd, MEMLINK_OK, g_runtime->synclog->version, g_runtime->synclog->index_pos);
conn->wlen = count;
conn_send_buffer(conn);*/
backup_ack(conn, cmd, MEMLINK_OK);
return MEMLINK_REPLIED;
} else {
/*int count;
char *wbuf = conn_write_buffer(conn, 32);
count = pack(wbuf, 32, "$4chii", cmd, MEMLINK_ERR_SYNC, g_runtime->synclog->version, g_runtime->synclog->index_pos);
conn->wlen = count;
conn_send_buffer(conn);*/
backup_ack(conn, cmd, MEMLINK_ERR_SYNC);
return MEMLINK_REPLIED;
}
}
DINFO("=============backup state: %d\n", wt->state);
DINFO("=============clog state: %d\n", wt->clog->state);
int ret = MEMLINK_OK;
if (wt->state == STATE_ALLREADY) {
int myver, myline, myret;
commitlog_read(wt->clog, &myver, &myline);
myret = wt->clog->state;
//DNOTE("my ver:%d, line:%d, ret:%d\n", myver, myline, myret);
DINFO("my ver:%d, line:%d, ret:%d\n", myver, myline, myret);
if (myver != lastver || myline != lastline) {
DINFO("logver, logline not equal, try backup sync.\n");
backup_sync();
/*int count;
char *wbuf = conn_write_buffer(conn, 32);
count = pack(wbuf, 32, "$4chii", cmd, MEMLINK_ERR_SYNC, g_runtime->synclog->version, g_runtime->synclog->index_pos);
conn->wlen = count;
conn_send_buffer(conn);*/
backup_ack(conn, cmd, MEMLINK_ERR_SYNC);
return MEMLINK_REPLIED;
//return MEMLINK_ERR_SYNC;
}
ret = backup_write_go(conn, data, cmd, lastret);
return ret;
}else{
DINFO("state error:%d\n", wt->state);
ret = MEMLINK_ERR_STATE;
}
return ret;
}
int
backup_cmd_write_result(Conn *conn, char cmd, char* data, int datalen)
{
WThread *wt = g_runtime->wthread;
//MasterInfo *mi = wt->master_info;
int lastver, lastline, lastret;
unpack(data+sizeof(int)+sizeof(char), 0, "iii", &lastret, &lastver, &lastline);
DINFO("cmd write_result, lastver:%d, lastline:%d, lastret:%d\n", lastver, lastline, lastret);
if (wt->state == STATE_ALLREADY) {
int myver, myline, myret;
commitlog_read(wt->clog, &myver, &myline);
myret = wt->clog->state;
DINFO("myver: %d, myline: %d, lastver: %d, lastline: %d\n", myver, myline, lastver, lastline);
if (myver != lastver || myline != lastline) {
DINFO("lastver, lastline not equal, try backup sync.\n");
backup_sync();
backup_ack(conn, cmd, MEMLINK_ERR_SYNC);
return MEMLINK_REPLIED;
}
int ret = 0;
if (wt->clog->state == INCOMPLETE) { // 未完成
if (lastret == COMMITED) {
DINFO("commit last log.\n");
ret = backup_last_do(conn, cmd);
//return ret;
}else{
DINFO("rollback last log.\n");
backup_ack(conn, cmd, MEMLINK_OK);
}
wt->clog->state = lastret;
} else if (wt->clog->state == COMMITED) {
/*int count;
char *wbuf = conn_write_buffer(conn, 8);
count = pack(wbuf, 8, "$4ch", cmd, ret, g_runtime->synclog->version, g_runtime->synclog->index_pos);
conn->wlen = count;
conn_send_buffer(conn);*/
backup_ack(conn, cmd, ret);
ret = MEMLINK_REPLIED;
}
return ret;
} else if (wt->state == STATE_SYNC) {
if (g_runtime->synclog->version == lastver && g_runtime->synclog->index_pos - 1 == lastline) {
DINFO("change state from SYNC to ALLREADY.\n");
wt->state = STATE_ALLREADY;
//g_runtime->slave->is_backup_do = TRUE;
// 断开主从同步连接
backup_sync_close();
int cmdlen;
unpack(data+sizeof(int)*4+sizeof(char), 0, "i", &cmdlen);
memcpy(wt->clog->data, data+sizeof(int)*5+sizeof(char), cmdlen);
wt->clog->len = cmdlen;
wt->clog->state = COMMITED;
backup_ack(conn, cmd, MEMLINK_OK);
return MEMLINK_REPLIED;
} else {
backup_ack(conn, cmd, MEMLINK_ERR_SYNC);
return MEMLINK_REPLIED;
}
}
return MEMLINK_OK;
}
int
backup_cmd_getport(Conn *conn, char* data, int datalen)
{
WThread *wt = g_runtime->wthread;
MasterInfo *mi = wt->master_info;
//mi->conn = conn;
unpack(data+sizeof(int)+sizeof(char), 0, "iiii", &mi->read_port, &mi->write_port, &mi->sync_port, &mi->hb_port);
DINFO("read_port:%d, write port:%d, sync_port:%d, hb_port:%d\n",
mi->read_port, mi->write_port, mi->sync_port, mi->hb_port);
event_del(&conn->evt);
g_cf->master_sync_port = mi->sync_port;
strcpy(g_cf->master_sync_host, mi->ip);
change_event(conn, EV_READ|EV_PERSIST, 0, 1);
return MEMLINK_REPLIED;
}
int
backup_ready(Conn *conn, char *data, int datalen)
{
WThread *wt = g_runtime->wthread;
MasterInfo *mi = wt->master_info;
DINFO("backup ready, state:%d\n", wt->state);
//mi->conn = conn;
// 不是主的连接
/*
if (strcmp(conn->client_ip, mi->ip) != 0) {
DERROR("not master ip!, client_ip: %s, maste ip: %s\n", conn->client_ip, mi->ip);
return backup_return_not_master(conn, mi);
}*/
if (wt->state == STATE_NOWRITE) {
DINFO("backup nowrite.\n");
return MEMLINK_ERR_NOWRITE;
}
char cmd;
memcpy(&cmd, data+sizeof(int), sizeof(char));
switch(cmd) {
case CMD_WRITE:
DINFO("======CMD_WRITE\n");
return backup_cmd_write(conn, cmd, data, datalen);
break;
case CMD_WRITE_RESULT:
DINFO("======CMD_WRITE_RESULT\n");
return backup_cmd_write_result(conn, cmd, data, datalen);
break;
case CMD_GETPORT:
DINFO("=====CMD_GETPORT\n");
return backup_cmd_getport(conn, data, datalen);
break;
default:
return backup_return_not_master(conn, mi);
}
return MEMLINK_ERR;
}