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已有数据同步功能完成

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1iaan
2026-01-29 10:47:24 +00:00
parent fe257cafec
commit 2bdb48d63d
27 changed files with 1134 additions and 139 deletions
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129
dump/kvs_snapshot.c
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@@ -1,16 +1,20 @@
#include "kvstore.h"
#include "diskuring/diskuring.h"
#include <unistd.h>
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/types.h>
char global_oplog_file[256] = "kvs_oplog.default.db";
char global_array_file[256] = "kvs_array.default.db";
char global_rbtree_file[256] = "kvs_rbtree.default.db";
char global_hash_file[256] = "kvs_hash.default.db";
int kvs_create_snapshot(const char* array_file, const char* rbtree_file, const char* hash_file){
int kvs_create_snapshot(iouring_ctx_t *uring, const char* array_file, const char* rbtree_file, const char* hash_file){
int ret = 0;
int rc = 0;
#if ENABLE_ARRAY
rc = kvs_array_save(&global_array, array_file);
rc = kvs_array_save(uring, &global_array, array_file);
if(rc < 0){
printf("kvs_engine_array save error\n");
ret = -1;
@@ -18,7 +22,7 @@ int kvs_create_snapshot(const char* array_file, const char* rbtree_file, const c
#endif
#if ENABLE_RBTREE
rc = kvs_rbtree_save(&global_rbtree, rbtree_file);
rc = kvs_rbtree_save(uring, &global_rbtree, rbtree_file);
if(rc < 0){
printf("kvs_engine_rbtree save error\n");
ret = -1;
@@ -26,7 +30,7 @@ int kvs_create_snapshot(const char* array_file, const char* rbtree_file, const c
#endif
#if ENABLE_HASH
rc = kvs_hash_save(&global_hash, hash_file);
rc = kvs_hash_save(uring, &global_hash, hash_file);
if(rc < 0){
printf("kvs_engine_hash save error\n");
ret = -1;
@@ -35,44 +39,93 @@ int kvs_create_snapshot(const char* array_file, const char* rbtree_file, const c
return ret;
}
void __create_snapshot_ok(const char* array_file, const char* rbtree_file, const char* hash_file){
void __complete_snapshot(const char *ip, int port, const char *array_file, const char *rbtree_file, const char *hash_file){
}
int kvs_create_snapshot_async(const char *ip, int port){
int pipefd[2]; // 用于子进程通知主进程
if (pipe(pipefd) == -1) { perror("pipe"); return -1; }
pid_t pid = fork();
if (pid == -1) { perror("fork"); return -1; }
static int send_file_to_ipport(const char *ip, int port, const char *filename) {
int sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0) { perror("socket"); return -1; }
if (pid == 0) { // 子进程
close(pipefd[0]); // 关闭读端
// 指定临时文件路径，避免覆盖 global_xxx_file
char tmp_array[128]; // 可写缓冲区
char tmp_rbtree[128];
char tmp_hash[128];
struct sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(port);
addr.sin_addr.s_addr = inet_addr(ip);
snprintf(tmp_array, sizeof(tmp_array), "snapshot_array_%s.tmp", ip);
snprintf(tmp_rbtree, sizeof(tmp_rbtree), "snapshot_rbtree_%s.tmp", ip);
snprintf(tmp_hash, sizeof(tmp_hash), "snapshot_hash_%s.tmp", ip);
int ret = kvs_create_snapshot(tmp_array, tmp_rbtree, tmp_hash);
if (ret == 0) {
// 成功：rename 到最终路径，或直接通知
write(pipefd[1], "OK", 2); // 通知主进程
} else {
write(pipefd[1], "ERR", 3);
}
close(pipefd[1]);
_exit(0); // 子进程退出
// hook point
__create_snapshot_ok(tmp_array, tmp_rbtree, tmp_hash);
} else { // 主进程
close(pipefd[1]); // 关闭写端
// 立即返回，继续处理其他请求（不阻塞）
// 可以记录 pid，在别处 waitpid(pid, NULL, WNOHANG) 检查完成
// 或用信号：signal(SIGCHLD, handler); 在 handler 中 read(pipefd[0]) 检查 "OK"
return 0; // SYNC 响应成功，主进程继续
if (connect(sockfd, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
perror("connect"); close(sockfd); return -1;
}
FILE *fp = fopen(filename, "rb");
if (!fp) { perror("fopen"); close(sockfd); return -1; }
char buf[4096];
size_t n;
while ((n = fread(buf, 1, sizeof(buf), fp)) > 0) {
ssize_t written = 0;
while (written < n) {
ssize_t ret = write(sockfd, buf + written, n - written);
if (ret < 0) {
perror("write");
fclose(fp);
close(sockfd);
return -1;
}
written += ret;
}
}
if (ferror(fp)) {
perror("fread");
fclose(fp);
close(sockfd);
return -1;
}
fclose(fp);
shutdown(sockfd, SHUT_WR);
close(sockfd);
return 0;
}
int kvs_create_snapshot_async(const char *ip, int port){
pid_t pid = fork();
if (pid == -1) { perror("fork"); return -1; }
if (pid == 0) {
char tmp_array[128];
char tmp_rbtree[128];
char tmp_hash[128];
snprintf(tmp_array, sizeof(tmp_array), "data/snapshot_array_%s.tmp.db", ip);
snprintf(tmp_rbtree, sizeof(tmp_rbtree), "data/snapshot_rbtree_%s.tmp.db", ip);
snprintf(tmp_hash, sizeof(tmp_hash), "data/snapshot_hash_%s.tmp.db", ip);
iouring_ctx_t uring;
iouring_init(&uring, 256);
int ret = kvs_create_snapshot(&uring, tmp_array, tmp_rbtree, tmp_hash);
if (ret != 0) {
fprintf(stderr, "snapshot creation failed\n");
_exit(1);
}
// 发送快照到目标 IP:port
if (send_file_to_ipport(ip, port, tmp_array) != 0 ||
send_file_to_ipport(ip, port, tmp_rbtree) != 0 ||
send_file_to_ipport(ip, port, tmp_hash) != 0) {
fprintf(stderr, "snapshot send failed\n");
_exit(1);
}
// hook 通知 eBPF
__complete_snapshot(ip, port, tmp_array, tmp_rbtree, tmp_hash);
iouring_shutdown(&uring);
_exit(0);
} else {
return 0;
}
}