rbtree和hash的全量持久化操作。rbtree的二进制安全。

粗略测试。

kvs_cmd_log.c

@@ -0,0 +1,100 @@
+#include "kvstore.h"
+#include "kvs_rw_tools.h"
+#include <arpa/inet.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+int init_cmd_log(const char *file, int *logfd){
+	if(!file) return -1;
+	int fd = open(file, O_RDWR | O_CREAT | O_APPEND, 0644);
+	if(fd < 0) return -2;
+
+	*logfd = fd;
+	return 0;
+}
+
+int destroy_cmd_log(int logfd){
+	close(logfd);
+	return 0;
+}
+
+
+
+int kvs_save_cmd_to_logfile(const uint8_t *cmd, size_t len, int logfd){
+	if (logfd < 0 || !cmd || len == 0)
+        return -1;
+
+    if (len > UINT32_MAX)
+        return -2;
+
+    uint32_t nlen = htonl((uint32_t)len);
+
+    if (write_full(logfd, &nlen, sizeof(nlen)) < 0)
+        return -3;
+
+    if (write_full(logfd, cmd, len) < 0)
+        return -4;
+
+	if (fsync(logfd) < 0)
+        return -5;
+
+	return 0;
+}
+
+int	kvs_replay_log(const char *logfile, int logfd){
+	 if (!logfile|| logfd<0) return -1;
+
+    for (;;) {
+        uint32_t nlen = 0;
+
+        int hr = read_full(logfd, &nlen, sizeof(nlen));
+        if (hr == 0) break;          /* EOF：正常结束 */
+        if (hr < 0) { return -2; }  /* 半截头 */
+
+        uint32_t len = ntohl(nlen);
+        if (len == 0) { return -3; }
+
+        uint8_t *cmd = (uint8_t *)kvs_malloc(len);
+        if (!cmd) { return -5; }
+
+        int pr = read_full(logfd, cmd, len);
+        if (pr <= 0) { /* 半截 payload */
+            kvs_free(cmd);
+            return -6;
+        }
+
+        kvs_req_t req;
+        memset(&req, 0, sizeof(req));
+
+        int clen = kvs_parse_one_cmd(cmd, (int)len, &req);
+        if (clen <= 0 || clen != (int)len) {
+            kvs_free_request(&req);
+            kvs_free(cmd);
+            return -7;
+        }
+
+        kvs_rsp_t rsp;
+        memset(&rsp, 0, sizeof(rsp));
+
+        if (kvs_execute_one_cmd(&req, &rsp) < 0) {
+            kvs_free_request(&req);
+            kvs_free(cmd);
+            return -8;
+        }
+
+        kvs_free_request(&req);
+        kvs_free(cmd);
+    }
+
+    return 0;
+}
+
+/**
+ * clear log file not close
+ */
+int ksv_clear_log(int logfd){
+	if(logfd < 0) return -1;
+	ftruncate(logfd, 0);
+	lseek(logfd, 0, SEEK_SET);
+	return 0;
+}