385 lines
9.2 KiB
C
385 lines
9.2 KiB
C
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#include "kvstore.h"
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#include "kvs_rw_tools.h"
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#include "mem_pool/mem_pool.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <pthread.h>
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#include <errno.h>
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#include <unistd.h>
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#include <arpa/inet.h>
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#include <libxml/parser.h>
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#include "common/config.h"
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#if ENABLE_ARRAY
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extern kvs_array_t global_array;
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#endif
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#if ENABLE_RBTREE
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extern kvs_rbtree_t global_rbtree;
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#endif
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#if ENABLE_HASH
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extern kvs_hash_t global_hash;
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#endif
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#if MEMORY_SELECT_MALLOC == MEMORY_USE_MYMALLOC
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extern mp_pool_t global_mempool;
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#endif
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AppConfig cfg;
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ServerMode mode = MODE_MASTER;
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int global_cmd_log_fd = -1;
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int is_update_cmd(kvs_cmd_t op){
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if(op == KVS_CMD_SET || op == KVS_CMD_RSET || op == KVS_CMD_HSET
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|| op == KVS_CMD_MOD || op == KVS_CMD_RMOD || op == KVS_CMD_HMOD
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|| op == KVS_CMD_DEL || op == KVS_CMD_RDEL || op == KVS_CMD_HDEL){
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return 1;
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}
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return 0;
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}
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/**
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* input : request request_length
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* output : response response_length
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* return : -1 error, =0 半包, 1 成功
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*/
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// int kvs_protocol(char *request, int request_length, char *response, int *response_length){
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int kvs_protocol(struct conn* conn){
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if (!conn) return -1;
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char *request = conn->rbuffer;
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int request_length = conn->rlength;
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char *response = conn->wbuffer;
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int *response_length = &conn->wlength;
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if (!request || request_length <= 0 || !response || !response_length) return -1;
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int consumed = 0;
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int out_len = 0;
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static int i = 0;
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while(consumed < request_length ){
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if(i > 33){
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i = i+1;
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i = i-1;
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}
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if(i == 47) i = 0;
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++i;
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kvs_req_t req;
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memset(&req, 0, sizeof(kvs_req_t));
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const uint8_t *p = request+consumed;
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int remain = request_length - consumed;
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int len = kvs_parse_one_cmd(p, remain, &req);
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if(len < 0){
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// 解析失败
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kvs_free_request(&req);
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*response_length = out_len;
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return -1;
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}
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else if(len == 0){
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// 半包
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kvs_free_request(&req);
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break;
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}
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kvs_rsp_t rsp;
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memset(&rsp, 0, sizeof(kvs_rsp_t));
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// 执行失败
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if (kvs_execute_one_cmd(&req, &rsp) < 0){
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kvs_free_request(&req);
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*response_length = out_len;
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return -1;
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}else{
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// 执行成功，在这里保存到日志中。
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if(rsp.status == KVS_STATUS_OK){
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if(is_update_cmd(req.op)){
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kvs_save_cmd_to_logfile(p, len, global_cmd_log_fd);
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}
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}
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}
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if(req.op == KVS_CMD_PSYNC){
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build_thread_to_sync(req.args->data, conn);
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}
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int resp_len = kvs_build_one_rsp(&rsp, (uint8_t *)response+out_len, KVS_MAX_RESPONSE-out_len);
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// 构建响应 <0 构建失败
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kvs_free_request(&req);
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if (resp_len < 0) {
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*response_length = out_len;
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return -1;
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}
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out_len += resp_len;
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consumed += len;
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}
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// slave 暂时不需要回报，或者回一个new_offset
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if(conn->is_from_master){
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conn->wlength = 0;
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return consumed;
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}
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*response_length = out_len;
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return consumed;
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}
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extern void sync_wakeup(int fd);
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static int g_slavefd = -1;
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static uint64_t g_offset = 0;
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static void *sync_thread_main(void *arg) {
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struct conn *conn = (struct conn*) arg;
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int logfd = open(KVS_CMD_LOG_FILE, O_RDONLY);
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if (logfd < 0) {
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printf("open replaylog failed: %s\n", strerror(errno));
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return NULL;
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}
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pthread_mutex_lock(&conn->g_sync_lock);
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uint64_t off = g_offset;
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pthread_mutex_unlock(&conn->g_sync_lock);
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while (1) {
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// 单槽位：等 reactor 发完再填
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pthread_mutex_lock(&conn->g_sync_lock);
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int busy = (conn->wlength > 0);
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pthread_mutex_unlock(&conn->g_sync_lock);
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if (busy) { usleep(10 * 1000); continue; }
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size_t filled = 0;
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int records = 0;
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// 试图攒一批
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while (filled < (size_t)KVS_MAX_RESPONSE && records < 128) {
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// 读 len 头
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uint32_t nlen = 0;
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ssize_t r = pread(logfd, &nlen, sizeof(nlen), (off_t)off);
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if (r == 0) {
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// EOF：文件当前没更多数据
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break;
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}
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if (r < 0) {
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if (errno == EINTR) continue;
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printf("pread len error: %s\n", strerror(errno));
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close(logfd);
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return NULL;
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}
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if (r < (ssize_t)sizeof(nlen)) {
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// 半截 len：writer 还没写完头
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break;
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}
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uint32_t len = ntohl(nlen);
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if(len <= 0) {
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printf("sync error\n");
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}
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// 这一条放不进本批次，就先发已有的
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if (filled + len > (size_t)KVS_MAX_RESPONSE) {
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break;
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}
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// 读 payload(cmd)
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ssize_t pr = pread(logfd, conn->wbuffer + filled, len,
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(off_t)(off + sizeof(nlen)));
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if (pr == 0) {
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// payload 还没写到
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break;
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}
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if (pr < 0) {
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if (errno == EINTR) continue;
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printf("pread payload error: %s\n", strerror(errno));
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close(logfd);
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return NULL;
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}
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if (pr < (ssize_t)len) {
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// 半截 payload：writer 还没写完这一条
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break;
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}
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// 成功拿到一条完整记录：推进
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off += sizeof(nlen) + (uint64_t)len;
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filled += (size_t)len;
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records++;
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}
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if (filled > 0) {
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// 提交给 reactor 发送
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pthread_mutex_lock(&conn->g_sync_lock);
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conn->wlength = (int)filled;
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g_offset = off;
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pthread_mutex_unlock(&conn->g_sync_lock);
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// 唤醒 reactor 发
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sync_wakeup(conn->fd); // 或 g_slavefd
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continue;
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}
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// 没攒到任何完整记录：说明真到末尾/半条记录，等一会儿
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usleep(10*1000);
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}
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close(logfd);
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return NULL;
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}
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void build_thread_to_sync(const uint8_t *offset, struct conn* conn){
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uint64_t off64 = 0;
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memcpy(&off64, offset, 8);
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pthread_mutex_lock(&conn->g_sync_lock);
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g_slavefd = conn->fd;
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g_offset = (uint64_t)off64;
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printf("offset:%ld\n", off64);
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conn->wlength = 0;
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pthread_mutex_unlock(&conn->g_sync_lock);
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pthread_t tid;
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int rc = pthread_create(&tid, NULL, sync_thread_main, conn);
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if (rc != 0) {
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printf("pthread_create failed: %s\n", strerror(rc));
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return;
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}
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pthread_detach(tid);
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}
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int init_kvengine(void) {
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#if ENABLE_ARRAY
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memset(&global_array, 0, sizeof(kvs_array_t));
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kvs_array_create(&global_array);
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kvs_array_load(&global_array, KVS_ARRAY_FILE);
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#endif
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#if ENABLE_RBTREE
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memset(&global_rbtree, 0, sizeof(kvs_rbtree_t));
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kvs_rbtree_create(&global_rbtree);
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kvs_rbtree_load(&global_rbtree, KVS_RBTREE_FILE);
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#endif
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#if ENABLE_HASH
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memset(&global_hash, 0, sizeof(kvs_hash_t));
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kvs_hash_create(&global_hash);
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kvs_hash_load(&global_hash, KVS_HASH_FILE);
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#endif
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init_cmd_log(KVS_CMD_LOG_FILE, &global_cmd_log_fd);
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kvs_replay_log(KVS_CMD_LOG_FILE, global_cmd_log_fd);
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return 0;
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}
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void dest_kvengine(void) {
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#if ENABLE_ARRAY
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kvs_array_destroy(&global_array);
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#endif
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#if ENABLE_RBTREE
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kvs_rbtree_destroy(&global_rbtree);
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#endif
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#if ENABLE_HASH
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kvs_hash_destroy(&global_hash);
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#endif
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destroy_cmd_log(global_cmd_log_fd);
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}
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void init_memory_pool(void){
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#if MEMORY_SELECT_MALLOC == MEMORY_USE_MYMALLOC
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mp_init(&global_mempool);
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#endif
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}
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void dest_memory_pool(void){
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#if MEMORY_SELECT_MALLOC == MEMORY_USE_MYMALLOC
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mp_destroy(&global_mempool);
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#endif
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}
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int init_config(AppConfig *cfg){
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xmlInitParser();
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if (config_load("config/config.xml", cfg) != 0) {
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fprintf(stderr, "Failed to load config/config.xml\n");
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xmlCleanupParser();
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return -1;
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}
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printf("=== Config ===\n");
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printf("IP : %s\n", cfg->ip);
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printf("Port : %d\n", cfg->port);
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printf("Log level : %s\n", log_level_to_string(cfg->log_level));
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printf("Master IP : %s\n", cfg->master_ip);
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printf("Master Port : %d\n", cfg->master_port);
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printf("Mode : %s\n", server_mode_to_string(cfg->mode));
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printf("Persistence : %s\n", persistence_to_string(cfg->persistence));
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printf("Allocator : %s\n", allocator_to_string(cfg->allocator));
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printf("=== Config ===\n");
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xmlCleanupParser();
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return 0;
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}
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int main(int argc, char *argv[]) {
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if(-1 == init_config(&cfg)){
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printf("Init Config error");
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return -1;
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}
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int port = cfg.port;
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mode = cfg.mode;
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char *master_ip = NULL;
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int master_port = -1;
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if(mode == MODE_SLAVE){
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master_ip = cfg.master_ip;
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master_port = cfg.master_port;
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}else if(mode == MODE_MASTER){
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}
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init_memory_pool();
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init_kvengine();
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#if (NETWORK_SELECT == NETWORK_REACTOR)
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reactor_start(port, kvs_protocol, master_ip, master_port); //
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#elif (NETWORK_SELECT == NETWORK_PROACTOR)
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proactor_start(port, kvs_protocol);
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#elif (NETWORK_SELECT == NETWORK_NTYCO)
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ntyco_start(port, kvs_protocol);
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#endif
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dest_kvengine();
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dest_memory_pool();
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}
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